haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

-----BEGIN PGP SIGNATURE-----

Browse source 
iQIcBAABAgAGBQJa5tx0AAoJEPMMOL0/L748ikoP+wTUVcqiIGmQYGLl6dQkIFvC
 Hr6GC/onQw7e0+73tFjfQ9eEePjQsnVGULq5Wpf9KCbgQLhzx28NiB4vQQvQcCet
 Qr6QL37HvJR5F0qo9eEKJ8q1AWe+StfzQcCGJV5ARhglMnfUkGgTUveg5ieHCSRD
 7u9cvwrH13UGq65+9055Boz8PbpDYW+FQaFANzptmHcol3FLWcEQLalm9M8AQtty
 /XCrPzFuhr0CvMAnVVpVi+AnnmDSaJwW5tdEaN4oCyV0+SRgzK4leOdMY+eCU9Ed
 fWz6awD+fVBK43Qm/3Fp5jTkTsEj6ZlT0rYbmtAy/PQ7dYPb0SihuY9gGc7fPg1I
 /tZYCjB05+mIqkDVWCqnP4Fy/TPJ0sXki37s7Mezpj8q5Do0k3490u4Flpj1BdNr
 d8JOODMoFpV7Q0V/zIpHRGrKkleFSQxOZEsxlm/FqXmm5xzoFlR8KBdq9Y8mj7PO
 Ckxf19Se5xZXxCXSmQ4H/oiW6S6+CrI6zdAohK1lDF+XqBrsMpBRKZtVV0rINbz3
 v38d3uB6xc8Cqi601eUdDe/wjOroGCr1cKaUBIYBB/yh6mdYysVOYAWZfRC9rI7c
 ymZGeJydIeqbLYMmw+e2RP6iHiOoUh9R1Mzx8/Vqv2Hx7IxOap9X+qqewnZe/4Ly
 Dpp0RkaQndIzyFQ8CZmT
 =AI6O
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-2.13-pull-request' into staging

# gpg: Signature made Mon 30 Apr 2018 10:05:56 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>"
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-2.13-pull-request: (42 commits)
  linux-user: Add ARM get_tls syscall support
  linux-user: move xtensa cpu loop to xtensa directory
  linux-user: move hppa cpu loop to hppa directory
  linux-user: move riscv cpu loop to riscv directory
  linux-user: move tilegx cpu loop to tilegx directory
  linux-user: move s390x cpu loop to s390x directory
  linux-user: move alpha cpu loop to alpha directory
  linux-user: move m68k cpu loop to m68k directory
  linux-user: move microblaze cpu loop to microblaze directory
  linux-user: move cris cpu loop to cris directory
  linux-user: move sh4 cpu loop to sh4 directory
  linux-user: move openrisc cpu loop to openrisc directory
  linux-user: move nios2 cpu loop to nios2 directory
  linux-user: move mips/mips64 cpu loop to mips directory
  linux-user: move ppc/ppc64 cpu loop to ppc directory
  linux-user: move sparc/sparc64 cpu loop to sparc directory
  linux-user: move arm cpu loop to arm directory
  linux-user: move aarch64 cpu loop to aarch64 directory
  linux-user: move i386/x86_64 cpu loop to i386 directory
  linux-user: create a dummy per arch cpu_loop.c
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-04-30 10:43:41 +01:00
parent 6f0c4706b3 62aaa51464
commit c2c768500f
71 changed files with 11888 additions and 10882 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
linux-user/Makefile.objs
View file

@ -1,6 +1,7 @@
obj-y = main.o syscall.o strace.o mmap.o signal.o \
elfload.o linuxload.o uaccess.o uname.o \
safe-syscall.o
safe-syscall.o $(TARGET_ABI_DIR)/signal.o \
$(TARGET_ABI_DIR)/cpu_loop.o
obj-$(TARGET_HAS_BFLT) += flatload.o
obj-$(TARGET_I386) += vm86.o

182
linux-user/aarch64/cpu_loop.c Normal file
View file

@ -0,0 +1,182 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
#define get_user_code_u32(x, gaddr, env) \
({ abi_long __r = get_user_u32((x), (gaddr)); \
if (!__r && bswap_code(arm_sctlr_b(env))) { \
(x) = bswap32(x); \
} \
__r; \
})
#define get_user_code_u16(x, gaddr, env) \
({ abi_long __r = get_user_u16((x), (gaddr)); \
if (!__r && bswap_code(arm_sctlr_b(env))) { \
(x) = bswap16(x); \
} \
__r; \
})
#define get_user_data_u32(x, gaddr, env) \
({ abi_long __r = get_user_u32((x), (gaddr)); \
if (!__r && arm_cpu_bswap_data(env)) { \
(x) = bswap32(x); \
} \
__r; \
})
#define get_user_data_u16(x, gaddr, env) \
({ abi_long __r = get_user_u16((x), (gaddr)); \
if (!__r && arm_cpu_bswap_data(env)) { \
(x) = bswap16(x); \
} \
__r; \
})
#define put_user_data_u32(x, gaddr, env) \
({ typeof(x) __x = (x); \
if (arm_cpu_bswap_data(env)) { \
__x = bswap32(__x); \
} \
put_user_u32(__x, (gaddr)); \
})
#define put_user_data_u16(x, gaddr, env) \
({ typeof(x) __x = (x); \
if (arm_cpu_bswap_data(env)) { \
__x = bswap16(__x); \
} \
put_user_u16(__x, (gaddr)); \
})
/* AArch64 main loop */
void cpu_loop(CPUARMState *env)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int trapnr, sig;
abi_long ret;
target_siginfo_t info;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SWI:
ret = do_syscall(env,
env->xregs[8],
env->xregs[0],
env->xregs[1],
env->xregs[2],
env->xregs[3],
env->xregs[4],
env->xregs[5],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->xregs[0] = ret;
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_UDEF:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->exception.vaddress;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_DEBUG:
case EXCP_BKPT:
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig) {
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_SEMIHOST:
env->xregs[0] = do_arm_semihosting(env);
break;
case EXCP_YIELD:
/* nothing to do here for user-mode, just resume guest code */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
abort();
}
process_pending_signals(env);
/* Exception return on AArch64 always clears the exclusive monitor,
* so any return to running guest code implies this.
*/
env->exclusive_addr = -1;
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
CPUState *cpu = ENV_GET_CPU(env);
TaskState *ts = cpu->opaque;
struct image_info *info = ts->info;
int i;
if (!(arm_feature(env, ARM_FEATURE_AARCH64))) {
fprintf(stderr,
"The selected ARM CPU does not support 64 bit mode\n");
exit(EXIT_FAILURE);
}
for (i = 0; i < 31; i++) {
env->xregs[i] = regs->regs[i];
}
env->pc = regs->pc;
env->xregs[31] = regs->sp;
#ifdef TARGET_WORDS_BIGENDIAN
env->cp15.sctlr_el[1] |= SCTLR_E0E;
for (i = 1; i < 4; ++i) {
env->cp15.sctlr_el[i] |= SCTLR_EE;
}
#endif
ts->stack_base = info->start_stack;
ts->heap_base = info->brk;
/* This will be filled in on the first SYS_HEAPINFO call. */
ts->heap_limit = 0;
}

586
linux-user/aarch64/signal.c Normal file
View file

@ -0,0 +1,586 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
uint64_t fault_address;
/* AArch64 registers */
uint64_t regs[31];
uint64_t sp;
uint64_t pc;
uint64_t pstate;
/* 4K reserved for FP/SIMD state and future expansion */
char __reserved[4096] __attribute__((__aligned__(16)));
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
target_sigset_t tuc_sigmask;
/* glibc uses a 1024-bit sigset_t */
char __unused[1024 / 8 - sizeof(target_sigset_t)];
/* last for future expansion */
struct target_sigcontext tuc_mcontext;
};
/*
* Header to be used at the beginning of structures extending the user
* context. Such structures must be placed after the rt_sigframe on the stack
* and be 16-byte aligned. The last structure must be a dummy one with the
* magic and size set to 0.
*/
struct target_aarch64_ctx {
uint32_t magic;
uint32_t size;
};
#define TARGET_FPSIMD_MAGIC 0x46508001
struct target_fpsimd_context {
struct target_aarch64_ctx head;
uint32_t fpsr;
uint32_t fpcr;
uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
};
#define TARGET_EXTRA_MAGIC 0x45585401
struct target_extra_context {
struct target_aarch64_ctx head;
uint64_t datap; /* 16-byte aligned pointer to extra space cast to __u64 */
uint32_t size; /* size in bytes of the extra space */
uint32_t reserved[3];
};
#define TARGET_SVE_MAGIC 0x53564501
struct target_sve_context {
struct target_aarch64_ctx head;
uint16_t vl;
uint16_t reserved[3];
/* The actual SVE data immediately follows. It is layed out
* according to TARGET_SVE_SIG_{Z,P}REG_OFFSET, based off of
* the original struct pointer.
*/
};
#define TARGET_SVE_VQ_BYTES 16
#define TARGET_SVE_SIG_ZREG_SIZE(VQ) ((VQ) * TARGET_SVE_VQ_BYTES)
#define TARGET_SVE_SIG_PREG_SIZE(VQ) ((VQ) * (TARGET_SVE_VQ_BYTES / 8))
#define TARGET_SVE_SIG_REGS_OFFSET \
QEMU_ALIGN_UP(sizeof(struct target_sve_context), TARGET_SVE_VQ_BYTES)
#define TARGET_SVE_SIG_ZREG_OFFSET(VQ, N) \
(TARGET_SVE_SIG_REGS_OFFSET + TARGET_SVE_SIG_ZREG_SIZE(VQ) * (N))
#define TARGET_SVE_SIG_PREG_OFFSET(VQ, N) \
(TARGET_SVE_SIG_ZREG_OFFSET(VQ, 32) + TARGET_SVE_SIG_PREG_SIZE(VQ) * (N))
#define TARGET_SVE_SIG_FFR_OFFSET(VQ) \
(TARGET_SVE_SIG_PREG_OFFSET(VQ, 16))
#define TARGET_SVE_SIG_CONTEXT_SIZE(VQ) \
(TARGET_SVE_SIG_PREG_OFFSET(VQ, 17))
struct target_rt_sigframe {
struct target_siginfo info;
struct target_ucontext uc;
};
struct target_rt_frame_record {
uint64_t fp;
uint64_t lr;
uint32_t tramp[2];
};
static void target_setup_general_frame(struct target_rt_sigframe *sf,
CPUARMState *env, target_sigset_t *set)
{
int i;
__put_user(0, &sf->uc.tuc_flags);
__put_user(0, &sf->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &sf->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->xregs[31]), &sf->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size, &sf->uc.tuc_stack.ss_size);
for (i = 0; i < 31; i++) {
__put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
}
__put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
__put_user(env->pc, &sf->uc.tuc_mcontext.pc);
__put_user(pstate_read(env), &sf->uc.tuc_mcontext.pstate);
__put_user(env->exception.vaddress, &sf->uc.tuc_mcontext.fault_address);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &sf->uc.tuc_sigmask.sig[i]);
}
}
static void target_setup_fpsimd_record(struct target_fpsimd_context *fpsimd,
CPUARMState *env)
{
int i;
__put_user(TARGET_FPSIMD_MAGIC, &fpsimd->head.magic);
__put_user(sizeof(struct target_fpsimd_context), &fpsimd->head.size);
__put_user(vfp_get_fpsr(env), &fpsimd->fpsr);
__put_user(vfp_get_fpcr(env), &fpsimd->fpcr);
for (i = 0; i < 32; i++) {
uint64_t *q = aa64_vfp_qreg(env, i);
#ifdef TARGET_WORDS_BIGENDIAN
__put_user(q[0], &fpsimd->vregs[i * 2 + 1]);
__put_user(q[1], &fpsimd->vregs[i * 2]);
#else
__put_user(q[0], &fpsimd->vregs[i * 2]);
__put_user(q[1], &fpsimd->vregs[i * 2 + 1]);
#endif
}
}
static void target_setup_extra_record(struct target_extra_context *extra,
uint64_t datap, uint32_t extra_size)
{
__put_user(TARGET_EXTRA_MAGIC, &extra->head.magic);
__put_user(sizeof(struct target_extra_context), &extra->head.size);
__put_user(datap, &extra->datap);
__put_user(extra_size, &extra->size);
}
static void target_setup_end_record(struct target_aarch64_ctx *end)
{
__put_user(0, &end->magic);
__put_user(0, &end->size);
}
static void target_setup_sve_record(struct target_sve_context *sve,
CPUARMState *env, int vq, int size)
{
int i, j;
__put_user(TARGET_SVE_MAGIC, &sve->head.magic);
__put_user(size, &sve->head.size);
__put_user(vq * TARGET_SVE_VQ_BYTES, &sve->vl);
/* Note that SVE regs are stored as a byte stream, with each byte element
* at a subsequent address. This corresponds to a little-endian store
* of our 64-bit hunks.
*/
for (i = 0; i < 32; ++i) {
uint64_t *z = (void *)sve + TARGET_SVE_SIG_ZREG_OFFSET(vq, i);
for (j = 0; j < vq * 2; ++j) {
__put_user_e(env->vfp.zregs[i].d[j], z + j, le);
}
}
for (i = 0; i <= 16; ++i) {
uint16_t *p = (void *)sve + TARGET_SVE_SIG_PREG_OFFSET(vq, i);
for (j = 0; j < vq; ++j) {
uint64_t r = env->vfp.pregs[i].p[j >> 2];
__put_user_e(r >> ((j & 3) * 16), p + j, le);
}
}
}
static void target_restore_general_frame(CPUARMState *env,
struct target_rt_sigframe *sf)
{
sigset_t set;
uint64_t pstate;
int i;
target_to_host_sigset(&set, &sf->uc.tuc_sigmask);
set_sigmask(&set);
for (i = 0; i < 31; i++) {
__get_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
}
__get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
__get_user(env->pc, &sf->uc.tuc_mcontext.pc);
__get_user(pstate, &sf->uc.tuc_mcontext.pstate);
pstate_write(env, pstate);
}
static void target_restore_fpsimd_record(CPUARMState *env,
struct target_fpsimd_context *fpsimd)
{
uint32_t fpsr, fpcr;
int i;
__get_user(fpsr, &fpsimd->fpsr);
vfp_set_fpsr(env, fpsr);
__get_user(fpcr, &fpsimd->fpcr);
vfp_set_fpcr(env, fpcr);
for (i = 0; i < 32; i++) {
uint64_t *q = aa64_vfp_qreg(env, i);
#ifdef TARGET_WORDS_BIGENDIAN
__get_user(q[0], &fpsimd->vregs[i * 2 + 1]);
__get_user(q[1], &fpsimd->vregs[i * 2]);
#else
__get_user(q[0], &fpsimd->vregs[i * 2]);
__get_user(q[1], &fpsimd->vregs[i * 2 + 1]);
#endif
}
}
static void target_restore_sve_record(CPUARMState *env,
struct target_sve_context *sve, int vq)
{
int i, j;
/* Note that SVE regs are stored as a byte stream, with each byte element
* at a subsequent address. This corresponds to a little-endian load
* of our 64-bit hunks.
*/
for (i = 0; i < 32; ++i) {
uint64_t *z = (void *)sve + TARGET_SVE_SIG_ZREG_OFFSET(vq, i);
for (j = 0; j < vq * 2; ++j) {
__get_user_e(env->vfp.zregs[i].d[j], z + j, le);
}
}
for (i = 0; i <= 16; ++i) {
uint16_t *p = (void *)sve + TARGET_SVE_SIG_PREG_OFFSET(vq, i);
for (j = 0; j < vq; ++j) {
uint16_t r;
__get_user_e(r, p + j, le);
if (j & 3) {
env->vfp.pregs[i].p[j >> 2] |= (uint64_t)r << ((j & 3) * 16);
} else {
env->vfp.pregs[i].p[j >> 2] = r;
}
}
}
}
static int target_restore_sigframe(CPUARMState *env,
struct target_rt_sigframe *sf)
{
struct target_aarch64_ctx *ctx, *extra = NULL;
struct target_fpsimd_context *fpsimd = NULL;
struct target_sve_context *sve = NULL;
uint64_t extra_datap = 0;
bool used_extra = false;
bool err = false;
int vq = 0, sve_size = 0;
target_restore_general_frame(env, sf);
ctx = (struct target_aarch64_ctx *)sf->uc.tuc_mcontext.__reserved;
while (ctx) {
uint32_t magic, size, extra_size;
__get_user(magic, &ctx->magic);
__get_user(size, &ctx->size);
switch (magic) {
case 0:
if (size != 0) {
err = true;
goto exit;
}
if (used_extra) {
ctx = NULL;
} else {
ctx = extra;
used_extra = true;
}
continue;
case TARGET_FPSIMD_MAGIC:
if (fpsimd || size != sizeof(struct target_fpsimd_context)) {
err = true;
goto exit;
}
fpsimd = (struct target_fpsimd_context *)ctx;
break;
case TARGET_SVE_MAGIC:
if (arm_feature(env, ARM_FEATURE_SVE)) {
vq = (env->vfp.zcr_el[1] & 0xf) + 1;
sve_size = QEMU_ALIGN_UP(TARGET_SVE_SIG_CONTEXT_SIZE(vq), 16);
if (!sve && size == sve_size) {
sve = (struct target_sve_context *)ctx;
break;
}
}
err = true;
goto exit;
case TARGET_EXTRA_MAGIC:
if (extra || size != sizeof(struct target_extra_context)) {
err = true;
goto exit;
}
__get_user(extra_datap,
&((struct target_extra_context *)ctx)->datap);
__get_user(extra_size,
&((struct target_extra_context *)ctx)->size);
extra = lock_user(VERIFY_READ, extra_datap, extra_size, 0);
break;
default:
/* Unknown record -- we certainly didn't generate it.
* Did we in fact get out of sync?
*/
err = true;
goto exit;
}
ctx = (void *)ctx + size;
}
/* Require FPSIMD always. */
if (fpsimd) {
target_restore_fpsimd_record(env, fpsimd);
} else {
err = true;
}
/* SVE data, if present, overwrites FPSIMD data. */
if (sve) {
target_restore_sve_record(env, sve, vq);
}
exit:
unlock_user(extra, extra_datap, 0);
return err;
}
static abi_ulong get_sigframe(struct target_sigaction *ka,
CPUARMState *env, int size)
{
abi_ulong sp;
sp = env->xregs[31];
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp = (sp - size) & ~15;
return sp;
}
typedef struct {
int total_size;
int extra_base;
int extra_size;
int std_end_ofs;
int extra_ofs;
int extra_end_ofs;
} target_sigframe_layout;
static int alloc_sigframe_space(int this_size, target_sigframe_layout *l)
{
/* Make sure there will always be space for the end marker. */
const int std_size = sizeof(struct target_rt_sigframe)
- sizeof(struct target_aarch64_ctx);
int this_loc = l->total_size;
if (l->extra_base) {
/* Once we have begun an extra space, all allocations go there. */
l->extra_size += this_size;
} else if (this_size + this_loc > std_size) {
/* This allocation does not fit in the standard space. */
/* Allocate the extra record. */
l->extra_ofs = this_loc;
l->total_size += sizeof(struct target_extra_context);
/* Allocate the standard end record. */
l->std_end_ofs = l->total_size;
l->total_size += sizeof(struct target_aarch64_ctx);
/* Allocate the requested record. */
l->extra_base = this_loc = l->total_size;
l->extra_size = this_size;
}
l->total_size += this_size;
return this_loc;
}
static void target_setup_frame(int usig, struct target_sigaction *ka,
target_siginfo_t *info, target_sigset_t *set,
CPUARMState *env)
{
target_sigframe_layout layout = {
/* Begin with the size pointing to the reserved space. */
.total_size = offsetof(struct target_rt_sigframe,
uc.tuc_mcontext.__reserved),
};
int fpsimd_ofs, fr_ofs, sve_ofs = 0, vq = 0, sve_size = 0;
struct target_rt_sigframe *frame;
struct target_rt_frame_record *fr;
abi_ulong frame_addr, return_addr;
/* FPSIMD record is always in the standard space. */
fpsimd_ofs = alloc_sigframe_space(sizeof(struct target_fpsimd_context),
&layout);
/* SVE state needs saving only if it exists. */
if (arm_feature(env, ARM_FEATURE_SVE)) {
vq = (env->vfp.zcr_el[1] & 0xf) + 1;
sve_size = QEMU_ALIGN_UP(TARGET_SVE_SIG_CONTEXT_SIZE(vq), 16);
sve_ofs = alloc_sigframe_space(sve_size, &layout);
}
if (layout.extra_ofs) {
/* Reserve space for the extra end marker. The standard end marker
* will have been allocated when we allocated the extra record.
*/
layout.extra_end_ofs
= alloc_sigframe_space(sizeof(struct target_aarch64_ctx), &layout);
} else {
/* Reserve space for the standard end marker.
* Do not use alloc_sigframe_space because we cheat
* std_size therein to reserve space for this.
*/
layout.std_end_ofs = layout.total_size;
layout.total_size += sizeof(struct target_aarch64_ctx);
}
/* We must always provide at least the standard 4K reserved space,
* even if we don't use all of it (this is part of the ABI)
*/
layout.total_size = MAX(layout.total_size,
sizeof(struct target_rt_sigframe));
/* Reserve space for the return code. On a real system this would
* be within the VDSO. So, despite the name this is not a "real"
* record within the frame.
*/
fr_ofs = layout.total_size;
layout.total_size += sizeof(struct target_rt_frame_record);
frame_addr = get_sigframe(ka, env, layout.total_size);
trace_user_setup_frame(env, frame_addr);
frame = lock_user(VERIFY_WRITE, frame_addr, layout.total_size, 0);
if (!frame) {
goto give_sigsegv;
}
target_setup_general_frame(frame, env, set);
target_setup_fpsimd_record((void *)frame + fpsimd_ofs, env);
target_setup_end_record((void *)frame + layout.std_end_ofs);
if (layout.extra_ofs) {
target_setup_extra_record((void *)frame + layout.extra_ofs,
frame_addr + layout.extra_base,
layout.extra_size);
target_setup_end_record((void *)frame + layout.extra_end_ofs);
}
if (sve_ofs) {
target_setup_sve_record((void *)frame + sve_ofs, env, vq, sve_size);
}
/* Set up the stack frame for unwinding. */
fr = (void *)frame + fr_ofs;
__put_user(env->xregs[29], &fr->fp);
__put_user(env->xregs[30], &fr->lr);
if (ka->sa_flags & TARGET_SA_RESTORER) {
return_addr = ka->sa_restorer;
} else {
/*
* mov x8,#__NR_rt_sigreturn; svc #0
* Since these are instructions they need to be put as little-endian
* regardless of target default or current CPU endianness.
*/
__put_user_e(0xd2801168, &fr->tramp[0], le);
__put_user_e(0xd4000001, &fr->tramp[1], le);
return_addr = frame_addr + fr_ofs
+ offsetof(struct target_rt_frame_record, tramp);
}
env->xregs[0] = usig;
env->xregs[31] = frame_addr;
env->xregs[29] = frame_addr + fr_ofs;
env->pc = ka->_sa_handler;
env->xregs[30] = return_addr;
if (info) {
tswap_siginfo(&frame->info, info);
env->xregs[1] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->xregs[2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
}
unlock_user(frame, frame_addr, layout.total_size);
return;
give_sigsegv:
unlock_user(frame, frame_addr, layout.total_size);
force_sigsegv(usig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info, target_sigset_t *set,
CPUARMState *env)
{
target_setup_frame(sig, ka, info, set, env);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUARMState *env)
{
target_setup_frame(sig, ka, 0, set, env);
}
long do_rt_sigreturn(CPUARMState *env)
{
struct target_rt_sigframe *frame = NULL;
abi_ulong frame_addr = env->xregs[31];
trace_user_do_rt_sigreturn(env, frame_addr);
if (frame_addr & 15) {
goto badframe;
}
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
if (target_restore_sigframe(env, frame)) {
goto badframe;
}
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_sigreturn(CPUARMState *env)
{
return do_rt_sigreturn(env);
}

1
linux-user/aarch64/target_signal.h
View file

@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
return state->xregs[31];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* AARCH64_TARGET_SIGNAL_H */

225
linux-user/alpha/cpu_loop.c Normal file
View file

@ -0,0 +1,225 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUAlphaState *env)
{
CPUState *cs = CPU(alpha_env_get_cpu(env));
int trapnr;
target_siginfo_t info;
abi_long sysret;
while (1) {
bool arch_interrupt = true;
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_RESET:
fprintf(stderr, "Reset requested. Exit\n");
exit(EXIT_FAILURE);
break;
case EXCP_MCHK:
fprintf(stderr, "Machine check exception. Exit\n");
exit(EXIT_FAILURE);
break;
case EXCP_SMP_INTERRUPT:
case EXCP_CLK_INTERRUPT:
case EXCP_DEV_INTERRUPT:
fprintf(stderr, "External interrupt. Exit\n");
exit(EXIT_FAILURE);
break;
case EXCP_MMFAULT:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = (page_get_flags(env->trap_arg0) & PAGE_VALID
? TARGET_SEGV_ACCERR : TARGET_SEGV_MAPERR);
info._sifields._sigfault._addr = env->trap_arg0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_UNALIGN:
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_ADRALN;
info._sifields._sigfault._addr = env->trap_arg0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_OPCDEC:
do_sigill:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPC;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ARITH:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_FLTINV;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_FEN:
/* No-op. Linux simply re-enables the FPU. */
break;
case EXCP_CALL_PAL:
switch (env->error_code) {
case 0x80:
/* BPT */
info.si_signo = TARGET_SIGTRAP;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case 0x81:
/* BUGCHK */
info.si_signo = TARGET_SIGTRAP;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case 0x83:
/* CALLSYS */
trapnr = env->ir[IR_V0];
sysret = do_syscall(env, trapnr,
env->ir[IR_A0], env->ir[IR_A1],
env->ir[IR_A2], env->ir[IR_A3],
env->ir[IR_A4], env->ir[IR_A5],
0, 0);
if (sysret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
break;
}
if (sysret == -TARGET_QEMU_ESIGRETURN) {
break;
}
/* Syscall writes 0 to V0 to bypass error check, similar
to how this is handled internal to Linux kernel.
(Ab)use trapnr temporarily as boolean indicating error. */
trapnr = (env->ir[IR_V0] != 0 && sysret < 0);
env->ir[IR_V0] = (trapnr ? -sysret : sysret);
env->ir[IR_A3] = trapnr;
break;
case 0x86:
/* IMB */
/* ??? We can probably elide the code using page_unprotect
that is checking for self-modifying code. Instead we
could simply call tb_flush here. Until we work out the
changes required to turn off the extra write protection,
this can be a no-op. */
break;
case 0x9E:
/* RDUNIQUE */
/* Handled in the translator for usermode. */
abort();
case 0x9F:
/* WRUNIQUE */
/* Handled in the translator for usermode. */
abort();
case 0xAA:
/* GENTRAP */
info.si_signo = TARGET_SIGFPE;
switch (env->ir[IR_A0]) {
case TARGET_GEN_INTOVF:
info.si_code = TARGET_FPE_INTOVF;
break;
case TARGET_GEN_INTDIV:
info.si_code = TARGET_FPE_INTDIV;
break;
case TARGET_GEN_FLTOVF:
info.si_code = TARGET_FPE_FLTOVF;
break;
case TARGET_GEN_FLTUND:
info.si_code = TARGET_FPE_FLTUND;
break;
case TARGET_GEN_FLTINV:
info.si_code = TARGET_FPE_FLTINV;
break;
case TARGET_GEN_FLTINE:
info.si_code = TARGET_FPE_FLTRES;
break;
case TARGET_GEN_ROPRAND:
info.si_code = 0;
break;
default:
info.si_signo = TARGET_SIGTRAP;
info.si_code = 0;
break;
}
info.si_errno = 0;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
default:
goto do_sigill;
}
break;
case EXCP_DEBUG:
info.si_signo = gdb_handlesig(cs, TARGET_SIGTRAP);
if (info.si_signo) {
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
} else {
arch_interrupt = false;
}
break;
case EXCP_INTERRUPT:
/* Just indicate that signals should be handled asap. */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
arch_interrupt = false;
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
/* Most of the traps imply a transition through PALcode, which
implies an REI instruction has been executed. Which means
that RX and LOCK_ADDR should be cleared. But there are a
few exceptions for traps internal to QEMU. */
if (arch_interrupt) {
env->flags &= ~ENV_FLAG_RX_FLAG;
env->lock_addr = -1;
}
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for(i = 0; i < 28; i++) {
env->ir[i] = ((abi_ulong *)regs)[i];
}
env->ir[IR_SP] = regs->usp;
env->pc = regs->pc;
}

280
linux-user/alpha/signal.c Normal file
View file

@ -0,0 +1,280 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_long sc_onstack;
abi_long sc_mask;
abi_long sc_pc;
abi_long sc_ps;
abi_long sc_regs[32];
abi_long sc_ownedfp;
abi_long sc_fpregs[32];
abi_ulong sc_fpcr;
abi_ulong sc_fp_control;
abi_ulong sc_reserved1;
abi_ulong sc_reserved2;
abi_ulong sc_ssize;
abi_ulong sc_sbase;
abi_ulong sc_traparg_a0;
abi_ulong sc_traparg_a1;
abi_ulong sc_traparg_a2;
abi_ulong sc_fp_trap_pc;
abi_ulong sc_fp_trigger_sum;
abi_ulong sc_fp_trigger_inst;
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
abi_ulong tuc_osf_sigmask;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask;
};
struct target_sigframe {
struct target_sigcontext sc;
unsigned int retcode[3];
};
struct target_rt_sigframe {
target_siginfo_t info;
struct target_ucontext uc;
unsigned int retcode[3];
};
#define INSN_MOV_R30_R16 0x47fe0410
#define INSN_LDI_R0 0x201f0000
#define INSN_CALLSYS 0x00000083
static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
abi_ulong frame_addr, target_sigset_t *set)
{
int i;
__put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
__put_user(set->sig[0], &sc->sc_mask);
__put_user(env->pc, &sc->sc_pc);
__put_user(8, &sc->sc_ps);
for (i = 0; i < 31; ++i) {
__put_user(env->ir[i], &sc->sc_regs[i]);
}
__put_user(0, &sc->sc_regs[31]);
for (i = 0; i < 31; ++i) {
__put_user(env->fir[i], &sc->sc_fpregs[i]);
}
__put_user(0, &sc->sc_fpregs[31]);
__put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
__put_user(0, &sc->sc_traparg_a0); /* FIXME */
__put_user(0, &sc->sc_traparg_a1); /* FIXME */
__put_user(0, &sc->sc_traparg_a2); /* FIXME */
}
static void restore_sigcontext(CPUAlphaState *env,
struct target_sigcontext *sc)
{
uint64_t fpcr;
int i;
__get_user(env->pc, &sc->sc_pc);
for (i = 0; i < 31; ++i) {
__get_user(env->ir[i], &sc->sc_regs[i]);
}
for (i = 0; i < 31; ++i) {
__get_user(env->fir[i], &sc->sc_fpregs[i]);
}
__get_user(fpcr, &sc->sc_fpcr);
cpu_alpha_store_fpcr(env, fpcr);
}
static inline abi_ulong get_sigframe(struct target_sigaction *sa,
CPUAlphaState *env,
unsigned long framesize)
{
abi_ulong sp = env->ir[IR_SP];
/* This is the X/Open sanctioned signal stack switching. */
if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return (sp - framesize) & -32;
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUAlphaState *env)
{
abi_ulong frame_addr, r26;
struct target_sigframe *frame;
int err = 0;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
setup_sigcontext(&frame->sc, env, frame_addr, set);
if (ka->sa_restorer) {
r26 = ka->sa_restorer;
} else {
__put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
__put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
&frame->retcode[1]);
__put_user(INSN_CALLSYS, &frame->retcode[2]);
/* imb() */
r26 = frame_addr + offsetof(struct target_sigframe, retcode);
}
unlock_user_struct(frame, frame_addr, 1);
if (err) {
give_sigsegv:
force_sigsegv(sig);
return;
}
env->ir[IR_RA] = r26;
env->ir[IR_PV] = env->pc = ka->_sa_handler;
env->ir[IR_A0] = sig;
env->ir[IR_A1] = 0;
env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
env->ir[IR_SP] = frame_addr;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUAlphaState *env)
{
abi_ulong frame_addr, r26;
struct target_rt_sigframe *frame;
int i, err = 0;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
tswap_siginfo(&frame->info, info);
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
__put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->ir[IR_SP]),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
if (ka->sa_restorer) {
r26 = ka->sa_restorer;
} else {
__put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
__put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
&frame->retcode[1]);
__put_user(INSN_CALLSYS, &frame->retcode[2]);
/* imb(); */
r26 = frame_addr + offsetof(struct target_sigframe, retcode);
}
if (err) {
give_sigsegv:
force_sigsegv(sig);
return;
}
env->ir[IR_RA] = r26;
env->ir[IR_PV] = env->pc = ka->_sa_handler;
env->ir[IR_A0] = sig;
env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
env->ir[IR_SP] = frame_addr;
}
long do_sigreturn(CPUAlphaState *env)
{
struct target_sigcontext *sc;
abi_ulong sc_addr = env->ir[IR_A0];
target_sigset_t target_set;
sigset_t set;
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
goto badframe;
}
target_sigemptyset(&target_set);
__get_user(target_set.sig[0], &sc->sc_mask);
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
restore_sigcontext(env, sc);
unlock_user_struct(sc, sc_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUAlphaState *env)
{
abi_ulong frame_addr = env->ir[IR_A0];
struct target_rt_sigframe *frame;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(env, &frame->uc.tuc_mcontext);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.tuc_stack),
0, env->ir[IR_SP]) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

1
linux-user/alpha/target_signal.h
View file

@ -55,4 +55,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUAlphaState *state)
#define TARGET_GEN_SUBRNG6 -24
#define TARGET_GEN_SUBRNG7 -25
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* ALPHA_TARGET_SIGNAL_H */

459
linux-user/arm/cpu_loop.c Normal file
View file

@ -0,0 +1,459 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "elf.h"
#include "cpu_loop-common.h"
#define get_user_code_u32(x, gaddr, env) \
({ abi_long __r = get_user_u32((x), (gaddr)); \
if (!__r && bswap_code(arm_sctlr_b(env))) { \
(x) = bswap32(x); \
} \
__r; \
})
#define get_user_code_u16(x, gaddr, env) \
({ abi_long __r = get_user_u16((x), (gaddr)); \
if (!__r && bswap_code(arm_sctlr_b(env))) { \
(x) = bswap16(x); \
} \
__r; \
})
#define get_user_data_u32(x, gaddr, env) \
({ abi_long __r = get_user_u32((x), (gaddr)); \
if (!__r && arm_cpu_bswap_data(env)) { \
(x) = bswap32(x); \
} \
__r; \
})
#define get_user_data_u16(x, gaddr, env) \
({ abi_long __r = get_user_u16((x), (gaddr)); \
if (!__r && arm_cpu_bswap_data(env)) { \
(x) = bswap16(x); \
} \
__r; \
})
#define put_user_data_u32(x, gaddr, env) \
({ typeof(x) __x = (x); \
if (arm_cpu_bswap_data(env)) { \
__x = bswap32(__x); \
} \
put_user_u32(__x, (gaddr)); \
})
#define put_user_data_u16(x, gaddr, env) \
({ typeof(x) __x = (x); \
if (arm_cpu_bswap_data(env)) { \
__x = bswap16(__x); \
} \
put_user_u16(__x, (gaddr)); \
})
/* Commpage handling -- there is no commpage for AArch64 */
/*
* See the Linux kernel's Documentation/arm/kernel_user_helpers.txt
* Input:
* r0 = pointer to oldval
* r1 = pointer to newval
* r2 = pointer to target value
*
* Output:
* r0 = 0 if *ptr was changed, non-0 if no exchange happened
* C set if *ptr was changed, clear if no exchange happened
*
* Note segv's in kernel helpers are a bit tricky, we can set the
* data address sensibly but the PC address is just the entry point.
*/
static void arm_kernel_cmpxchg64_helper(CPUARMState *env)
{
uint64_t oldval, newval, val;
uint32_t addr, cpsr;
target_siginfo_t info;
/* Based on the 32 bit code in do_kernel_trap */
/* XXX: This only works between threads, not between processes.
It's probably possible to implement this with native host
operations. However things like ldrex/strex are much harder so
there's not much point trying. */
start_exclusive();
cpsr = cpsr_read(env);
addr = env->regs[2];
if (get_user_u64(oldval, env->regs[0])) {
env->exception.vaddress = env->regs[0];
goto segv;
};
if (get_user_u64(newval, env->regs[1])) {
env->exception.vaddress = env->regs[1];
goto segv;
};
if (get_user_u64(val, addr)) {
env->exception.vaddress = addr;
goto segv;
}
if (val == oldval) {
val = newval;
if (put_user_u64(val, addr)) {
env->exception.vaddress = addr;
goto segv;
};
env->regs[0] = 0;
cpsr |= CPSR_C;
} else {
env->regs[0] = -1;
cpsr &= ~CPSR_C;
}
cpsr_write(env, cpsr, CPSR_C, CPSRWriteByInstr);
end_exclusive();
return;
segv:
end_exclusive();
/* We get the PC of the entry address - which is as good as anything,
on a real kernel what you get depends on which mode it uses. */
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->exception.vaddress;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
/* Handle a jump to the kernel code page. */
static int
do_kernel_trap(CPUARMState *env)
{
uint32_t addr;
uint32_t cpsr;
uint32_t val;
switch (env->regs[15]) {
case 0xffff0fa0: /* __kernel_memory_barrier */
/* ??? No-op. Will need to do better for SMP. */
break;
case 0xffff0fc0: /* __kernel_cmpxchg */
/* XXX: This only works between threads, not between processes.
It's probably possible to implement this with native host
operations. However things like ldrex/strex are much harder so
there's not much point trying. */
start_exclusive();
cpsr = cpsr_read(env);
addr = env->regs[2];
/* FIXME: This should SEGV if the access fails. */
if (get_user_u32(val, addr))
val = ~env->regs[0];
if (val == env->regs[0]) {
val = env->regs[1];
/* FIXME: Check for segfaults. */
put_user_u32(val, addr);
env->regs[0] = 0;
cpsr |= CPSR_C;
} else {
env->regs[0] = -1;
cpsr &= ~CPSR_C;
}
cpsr_write(env, cpsr, CPSR_C, CPSRWriteByInstr);
end_exclusive();
break;
case 0xffff0fe0: /* __kernel_get_tls */
env->regs[0] = cpu_get_tls(env);
break;
case 0xffff0f60: /* __kernel_cmpxchg64 */
arm_kernel_cmpxchg64_helper(env);
break;
default:
return 1;
}
/* Jump back to the caller. */
addr = env->regs[14];
if (addr & 1) {
env->thumb = 1;
addr &= ~1;
}
env->regs[15] = addr;
return 0;
}
void cpu_loop(CPUARMState *env)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int trapnr;
unsigned int n, insn;
target_siginfo_t info;
uint32_t addr;
abi_ulong ret;
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_UDEF:
case EXCP_NOCP:
case EXCP_INVSTATE:
{
TaskState *ts = cs->opaque;
uint32_t opcode;
int rc;
/* we handle the FPU emulation here, as Linux */
/* we get the opcode */
/* FIXME - what to do if get_user() fails? */
get_user_code_u32(opcode, env->regs[15], env);
rc = EmulateAll(opcode, &ts->fpa, env);
if (rc == 0) { /* illegal instruction */
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->regs[15];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
} else if (rc < 0) { /* FP exception */
int arm_fpe=0;
/* translate softfloat flags to FPSR flags */
if (-rc & float_flag_invalid)
arm_fpe |= BIT_IOC;
if (-rc & float_flag_divbyzero)
arm_fpe |= BIT_DZC;
if (-rc & float_flag_overflow)
arm_fpe |= BIT_OFC;
if (-rc & float_flag_underflow)
arm_fpe |= BIT_UFC;
if (-rc & float_flag_inexact)
arm_fpe |= BIT_IXC;
FPSR fpsr = ts->fpa.fpsr;
//printf("fpsr 0x%x, arm_fpe 0x%x\n",fpsr,arm_fpe);
if (fpsr & (arm_fpe << 16)) { /* exception enabled? */
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
/* ordered by priority, least first */
if (arm_fpe & BIT_IXC) info.si_code = TARGET_FPE_FLTRES;
if (arm_fpe & BIT_UFC) info.si_code = TARGET_FPE_FLTUND;
if (arm_fpe & BIT_OFC) info.si_code = TARGET_FPE_FLTOVF;
if (arm_fpe & BIT_DZC) info.si_code = TARGET_FPE_FLTDIV;
if (arm_fpe & BIT_IOC) info.si_code = TARGET_FPE_FLTINV;
info._sifields._sigfault._addr = env->regs[15];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
} else {
env->regs[15] += 4;
}
/* accumulate unenabled exceptions */
if ((!(fpsr & BIT_IXE)) && (arm_fpe & BIT_IXC))
fpsr |= BIT_IXC;
if ((!(fpsr & BIT_UFE)) && (arm_fpe & BIT_UFC))
fpsr |= BIT_UFC;
if ((!(fpsr & BIT_OFE)) && (arm_fpe & BIT_OFC))
fpsr |= BIT_OFC;
if ((!(fpsr & BIT_DZE)) && (arm_fpe & BIT_DZC))
fpsr |= BIT_DZC;
if ((!(fpsr & BIT_IOE)) && (arm_fpe & BIT_IOC))
fpsr |= BIT_IOC;
ts->fpa.fpsr=fpsr;
} else { /* everything OK */
/* increment PC */
env->regs[15] += 4;
}
}
break;
case EXCP_SWI:
case EXCP_BKPT:
{
env->eabi = 1;
/* system call */
if (trapnr == EXCP_BKPT) {
if (env->thumb) {
/* FIXME - what to do if get_user() fails? */
get_user_code_u16(insn, env->regs[15], env);
n = insn & 0xff;
env->regs[15] += 2;
} else {
/* FIXME - what to do if get_user() fails? */
get_user_code_u32(insn, env->regs[15], env);
n = (insn & 0xf) | ((insn >> 4) & 0xff0);
env->regs[15] += 4;
}
} else {
if (env->thumb) {
/* FIXME - what to do if get_user() fails? */
get_user_code_u16(insn, env->regs[15] - 2, env);
n = insn & 0xff;
} else {
/* FIXME - what to do if get_user() fails? */
get_user_code_u32(insn, env->regs[15] - 4, env);
n = insn & 0xffffff;
}
}
if (n == ARM_NR_cacheflush) {
/* nop */
} else if (n == ARM_NR_semihosting
|| n == ARM_NR_thumb_semihosting) {
env->regs[0] = do_arm_semihosting (env);
} else if (n == 0 || n >= ARM_SYSCALL_BASE || env->thumb) {
/* linux syscall */
if (env->thumb || n == 0) {
n = env->regs[7];
} else {
n -= ARM_SYSCALL_BASE;
env->eabi = 0;
}
if ( n > ARM_NR_BASE) {
switch (n) {
case ARM_NR_cacheflush:
/* nop */
break;
case ARM_NR_set_tls:
cpu_set_tls(env, env->regs[0]);
env->regs[0] = 0;
break;
case ARM_NR_breakpoint:
env->regs[15] -= env->thumb ? 2 : 4;
goto excp_debug;
case ARM_NR_get_tls:
env->regs[0] = cpu_get_tls(env);
break;
default:
gemu_log("qemu: Unsupported ARM syscall: 0x%x\n",
n);
env->regs[0] = -TARGET_ENOSYS;
break;
}
} else {
ret = do_syscall(env,
n,
env->regs[0],
env->regs[1],
env->regs[2],
env->regs[3],
env->regs[4],
env->regs[5],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->regs[15] -= env->thumb ? 2 : 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[0] = ret;
}
}
} else {
goto error;
}
}
break;
case EXCP_SEMIHOST:
env->regs[0] = do_arm_semihosting(env);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
addr = env->exception.vaddress;
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = addr;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_DEBUG:
excp_debug:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_KERNEL_TRAP:
if (do_kernel_trap(env))
goto error;
break;
case EXCP_YIELD:
/* nothing to do here for user-mode, just resume guest code */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
error:
EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
abort();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
CPUState *cpu = ENV_GET_CPU(env);
TaskState *ts = cpu->opaque;
struct image_info *info = ts->info;
int i;
cpsr_write(env, regs->uregs[16], CPSR_USER | CPSR_EXEC,
CPSRWriteByInstr);
for(i = 0; i < 16; i++) {
env->regs[i] = regs->uregs[i];
}
#ifdef TARGET_WORDS_BIGENDIAN
/* Enable BE8. */
if (EF_ARM_EABI_VERSION(info->elf_flags) >= EF_ARM_EABI_VER4
&& (info->elf_flags & EF_ARM_BE8)) {
env->uncached_cpsr |= CPSR_E;
env->cp15.sctlr_el[1] |= SCTLR_E0E;
} else {
env->cp15.sctlr_el[1] |= SCTLR_B;
}
#endif
ts->stack_base = info->start_stack;
ts->heap_base = info->brk;
/* This will be filled in on the first SYS_HEAPINFO call. */
ts->heap_limit = 0;
}

772
linux-user/arm/signal.c Normal file
View file

@ -0,0 +1,772 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_ulong trap_no;
abi_ulong error_code;
abi_ulong oldmask;
abi_ulong arm_r0;
abi_ulong arm_r1;
abi_ulong arm_r2;
abi_ulong arm_r3;
abi_ulong arm_r4;
abi_ulong arm_r5;
abi_ulong arm_r6;
abi_ulong arm_r7;
abi_ulong arm_r8;
abi_ulong arm_r9;
abi_ulong arm_r10;
abi_ulong arm_fp;
abi_ulong arm_ip;
abi_ulong arm_sp;
abi_ulong arm_lr;
abi_ulong arm_pc;
abi_ulong arm_cpsr;
abi_ulong fault_address;
};
struct target_ucontext_v1 {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_ucontext_v2 {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
char __unused[128 - sizeof(target_sigset_t)];
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
};
struct target_user_vfp {
uint64_t fpregs[32];
abi_ulong fpscr;
};
struct target_user_vfp_exc {
abi_ulong fpexc;
abi_ulong fpinst;
abi_ulong fpinst2;
};
struct target_vfp_sigframe {
abi_ulong magic;
abi_ulong size;
struct target_user_vfp ufp;
struct target_user_vfp_exc ufp_exc;
} __attribute__((__aligned__(8)));
struct target_iwmmxt_sigframe {
abi_ulong magic;
abi_ulong size;
uint64_t regs[16];
/* Note that not all the coprocessor control registers are stored here */
uint32_t wcssf;
uint32_t wcasf;
uint32_t wcgr0;
uint32_t wcgr1;
uint32_t wcgr2;
uint32_t wcgr3;
} __attribute__((__aligned__(8)));
#define TARGET_VFP_MAGIC 0x56465001
#define TARGET_IWMMXT_MAGIC 0x12ef842a
struct sigframe_v1
{
struct target_sigcontext sc;
abi_ulong extramask[TARGET_NSIG_WORDS-1];
abi_ulong retcode;
};
struct sigframe_v2
{
struct target_ucontext_v2 uc;
abi_ulong retcode;
};
struct rt_sigframe_v1
{
abi_ulong pinfo;
abi_ulong puc;
struct target_siginfo info;
struct target_ucontext_v1 uc;
abi_ulong retcode;
};
struct rt_sigframe_v2
{
struct target_siginfo info;
struct target_ucontext_v2 uc;
abi_ulong retcode;
};
#define TARGET_CONFIG_CPU_32 1
/*
* For ARM syscalls, we encode the syscall number into the instruction.
*/
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
/*
* For Thumb syscalls, we pass the syscall number via r7. We therefore
* need two 16-bit instructions.
*/
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
static const abi_ulong retcodes[4] = {
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
};
static inline int valid_user_regs(CPUARMState *regs)
{
return 1;
}
static void
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
CPUARMState *env, abi_ulong mask)
{
__put_user(env->regs[0], &sc->arm_r0);
__put_user(env->regs[1], &sc->arm_r1);
__put_user(env->regs[2], &sc->arm_r2);
__put_user(env->regs[3], &sc->arm_r3);
__put_user(env->regs[4], &sc->arm_r4);
__put_user(env->regs[5], &sc->arm_r5);
__put_user(env->regs[6], &sc->arm_r6);
__put_user(env->regs[7], &sc->arm_r7);
__put_user(env->regs[8], &sc->arm_r8);
__put_user(env->regs[9], &sc->arm_r9);
__put_user(env->regs[10], &sc->arm_r10);
__put_user(env->regs[11], &sc->arm_fp);
__put_user(env->regs[12], &sc->arm_ip);
__put_user(env->regs[13], &sc->arm_sp);
__put_user(env->regs[14], &sc->arm_lr);
__put_user(env->regs[15], &sc->arm_pc);
#ifdef TARGET_CONFIG_CPU_32
__put_user(cpsr_read(env), &sc->arm_cpsr);
#endif
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
__put_user(/* current->thread.error_code */ 0, &sc->error_code);
__put_user(/* current->thread.address */ 0, &sc->fault_address);
__put_user(mask, &sc->oldmask);
}
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
{
unsigned long sp = regs->regs[13];
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
/*
* ATPCS B01 mandates 8-byte alignment
*/
return (sp - framesize) & ~7;
}
static void
setup_return(CPUARMState *env, struct target_sigaction *ka,
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
{
abi_ulong handler = ka->_sa_handler;
abi_ulong retcode;
int thumb = handler & 1;
uint32_t cpsr = cpsr_read(env);
cpsr &= ~CPSR_IT;
if (thumb) {
cpsr |= CPSR_T;
} else {
cpsr &= ~CPSR_T;
}
if (ka->sa_flags & TARGET_SA_RESTORER) {
retcode = ka->sa_restorer;
} else {
unsigned int idx = thumb;
if (ka->sa_flags & TARGET_SA_SIGINFO) {
idx += 2;
}
__put_user(retcodes[idx], rc);
retcode = rc_addr + thumb;
}
env->regs[0] = usig;
env->regs[13] = frame_addr;
env->regs[14] = retcode;
env->regs[15] = handler & (thumb ? ~1 : ~3);
cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr);
}
static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
{
int i;
struct target_vfp_sigframe *vfpframe;
vfpframe = (struct target_vfp_sigframe *)regspace;
__put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
__put_user(sizeof(*vfpframe), &vfpframe->size);
for (i = 0; i < 32; i++) {
__put_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
}
__put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
__put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
__put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
__put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
return (abi_ulong*)(vfpframe+1);
}
static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
CPUARMState *env)
{
int i;
struct target_iwmmxt_sigframe *iwmmxtframe;
iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
__put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
__put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
for (i = 0; i < 16; i++) {
__put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
}
__put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
__put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
__put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
__put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
__put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
__put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
return (abi_ulong*)(iwmmxtframe+1);
}
static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
target_sigset_t *set, CPUARMState *env)
{
struct target_sigaltstack stack;
int i;
abi_ulong *regspace;
/* Clear all the bits of the ucontext we don't use. */
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
memset(&stack, 0, sizeof(stack));
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
/* Save coprocessor signal frame. */
regspace = uc->tuc_regspace;
if (arm_feature(env, ARM_FEATURE_VFP)) {
regspace = setup_sigframe_v2_vfp(regspace, env);
}
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
regspace = setup_sigframe_v2_iwmmxt(regspace, env);
}
/* Write terminating magic word */
__put_user(0, regspace);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
}
}
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
static void setup_frame_v1(int usig, struct target_sigaction *ka,
target_sigset_t *set, CPUARMState *regs)
{
struct sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
int i;
trace_user_setup_frame(regs, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto sigsegv;
}
setup_sigcontext(&frame->sc, regs, set->sig[0]);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
setup_return(regs, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct sigframe_v1, retcode));
unlock_user_struct(frame, frame_addr, 1);
return;
sigsegv:
force_sigsegv(usig);
}
static void setup_frame_v2(int usig, struct target_sigaction *ka,
target_sigset_t *set, CPUARMState *regs)
{
struct sigframe_v2 *frame;
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
trace_user_setup_frame(regs, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto sigsegv;
}
setup_sigframe_v2(&frame->uc, set, regs);
setup_return(regs, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct sigframe_v2, retcode));
unlock_user_struct(frame, frame_addr, 1);
return;
sigsegv:
force_sigsegv(usig);
}
void setup_frame(int usig, struct target_sigaction *ka,
target_sigset_t *set, CPUARMState *regs)
{
if (get_osversion() >= 0x020612) {
setup_frame_v2(usig, ka, set, regs);
} else {
setup_frame_v1(usig, ka, set, regs);
}
}
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUARMState *env)
{
struct rt_sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
struct target_sigaltstack stack;
int i;
abi_ulong info_addr, uc_addr;
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto sigsegv;
}
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
__put_user(info_addr, &frame->pinfo);
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
__put_user(uc_addr, &frame->puc);
tswap_siginfo(&frame->info, info);
/* Clear all the bits of the ucontext we don't use. */
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
memset(&stack, 0, sizeof(stack));
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
setup_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
unlock_user_struct(frame, frame_addr, 1);
return;
sigsegv:
force_sigsegv(usig);
}
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUARMState *env)
{
struct rt_sigframe_v2 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
abi_ulong info_addr, uc_addr;
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto sigsegv;
}
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
tswap_siginfo(&frame->info, info);
setup_sigframe_v2(&frame->uc, set, env);
setup_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
unlock_user_struct(frame, frame_addr, 1);
return;
sigsegv:
force_sigsegv(usig);
}
void setup_rt_frame(int usig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUARMState *env)
{
if (get_osversion() >= 0x020612) {
setup_rt_frame_v2(usig, ka, info, set, env);
} else {
setup_rt_frame_v1(usig, ka, info, set, env);
}
}
static int
restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
{
int err = 0;
uint32_t cpsr;
__get_user(env->regs[0], &sc->arm_r0);
__get_user(env->regs[1], &sc->arm_r1);
__get_user(env->regs[2], &sc->arm_r2);
__get_user(env->regs[3], &sc->arm_r3);
__get_user(env->regs[4], &sc->arm_r4);
__get_user(env->regs[5], &sc->arm_r5);
__get_user(env->regs[6], &sc->arm_r6);
__get_user(env->regs[7], &sc->arm_r7);
__get_user(env->regs[8], &sc->arm_r8);
__get_user(env->regs[9], &sc->arm_r9);
__get_user(env->regs[10], &sc->arm_r10);
__get_user(env->regs[11], &sc->arm_fp);
__get_user(env->regs[12], &sc->arm_ip);
__get_user(env->regs[13], &sc->arm_sp);
__get_user(env->regs[14], &sc->arm_lr);
__get_user(env->regs[15], &sc->arm_pc);
#ifdef TARGET_CONFIG_CPU_32
__get_user(cpsr, &sc->arm_cpsr);
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr);
#endif
err |= !valid_user_regs(env);
return err;
}
static long do_sigreturn_v1(CPUARMState *env)
{
abi_ulong frame_addr;
struct sigframe_v1 *frame = NULL;
target_sigset_t set;
sigset_t host_set;
int i;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
frame_addr = env->regs[13];
trace_user_do_sigreturn(env, frame_addr);
if (frame_addr & 7) {
goto badframe;
}
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
__get_user(set.sig[0], &frame->sc.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&host_set, &set);
set_sigmask(&host_set);
if (restore_sigcontext(env, &frame->sc)) {
goto badframe;
}
#if 0
/* Send SIGTRAP if we're single-stepping */
if (ptrace_cancel_bpt(current))
send_sig(SIGTRAP, current, 1);
#endif
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
{
int i;
abi_ulong magic, sz;
uint32_t fpscr, fpexc;
struct target_vfp_sigframe *vfpframe;
vfpframe = (struct target_vfp_sigframe *)regspace;
__get_user(magic, &vfpframe->magic);
__get_user(sz, &vfpframe->size);
if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
return 0;
}
for (i = 0; i < 32; i++) {
__get_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
}
__get_user(fpscr, &vfpframe->ufp.fpscr);
vfp_set_fpscr(env, fpscr);
__get_user(fpexc, &vfpframe->ufp_exc.fpexc);
/* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
* and the exception flag is cleared
*/
fpexc |= (1 << 30);
fpexc &= ~((1 << 31) | (1 << 28));
env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
__get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
__get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
return (abi_ulong*)(vfpframe + 1);
}
static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
abi_ulong *regspace)
{
int i;
abi_ulong magic, sz;
struct target_iwmmxt_sigframe *iwmmxtframe;
iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
__get_user(magic, &iwmmxtframe->magic);
__get_user(sz, &iwmmxtframe->size);
if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
return 0;
}
for (i = 0; i < 16; i++) {
__get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
}
__get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
__get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
__get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
__get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
__get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
__get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
return (abi_ulong*)(iwmmxtframe + 1);
}
static int do_sigframe_return_v2(CPUARMState *env,
target_ulong context_addr,
struct target_ucontext_v2 *uc)
{
sigset_t host_set;
abi_ulong *regspace;
target_to_host_sigset(&host_set, &uc->tuc_sigmask);
set_sigmask(&host_set);
if (restore_sigcontext(env, &uc->tuc_mcontext))
return 1;
/* Restore coprocessor signal frame */
regspace = uc->tuc_regspace;
if (arm_feature(env, ARM_FEATURE_VFP)) {
regspace = restore_sigframe_v2_vfp(env, regspace);
if (!regspace) {
return 1;
}
}
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
regspace = restore_sigframe_v2_iwmmxt(env, regspace);
if (!regspace) {
return 1;
}
}
if (do_sigaltstack(context_addr
+ offsetof(struct target_ucontext_v2, tuc_stack),
0, get_sp_from_cpustate(env)) == -EFAULT) {
return 1;
}
#if 0
/* Send SIGTRAP if we're single-stepping */
if (ptrace_cancel_bpt(current))
send_sig(SIGTRAP, current, 1);
#endif
return 0;
}
static long do_sigreturn_v2(CPUARMState *env)
{
abi_ulong frame_addr;
struct sigframe_v2 *frame = NULL;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
frame_addr = env->regs[13];
trace_user_do_sigreturn(env, frame_addr);
if (frame_addr & 7) {
goto badframe;
}
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
if (do_sigframe_return_v2(env,
frame_addr
+ offsetof(struct sigframe_v2, uc),
&frame->uc)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_sigreturn(CPUARMState *env)
{
if (get_osversion() >= 0x020612) {
return do_sigreturn_v2(env);
} else {
return do_sigreturn_v1(env);
}
}
static long do_rt_sigreturn_v1(CPUARMState *env)
{
abi_ulong frame_addr;
struct rt_sigframe_v1 *frame = NULL;
sigset_t host_set;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
frame_addr = env->regs[13];
trace_user_do_rt_sigreturn(env, frame_addr);
if (frame_addr & 7) {
goto badframe;
}
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
set_sigmask(&host_set);
if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
goto badframe;
}
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
#if 0
/* Send SIGTRAP if we're single-stepping */
if (ptrace_cancel_bpt(current))
send_sig(SIGTRAP, current, 1);
#endif
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
static long do_rt_sigreturn_v2(CPUARMState *env)
{
abi_ulong frame_addr;
struct rt_sigframe_v2 *frame = NULL;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
frame_addr = env->regs[13];
trace_user_do_rt_sigreturn(env, frame_addr);
if (frame_addr & 7) {
goto badframe;
}
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
if (do_sigframe_return_v2(env,
frame_addr
+ offsetof(struct rt_sigframe_v2, uc),
&frame->uc)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUARMState *env)
{
if (get_osversion() >= 0x020612) {
return do_rt_sigreturn_v2(env);
} else {
return do_rt_sigreturn_v1(env);
}
}

2
linux-user/arm/target_signal.h
View file

@ -26,5 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
return state->regs[13];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* ARM_TARGET_SIGNAL_H */

1
linux-user/arm/target_syscall.h
View file

@ -16,6 +16,7 @@ struct target_pt_regs {
#define ARM_NR_breakpoint (ARM_NR_BASE + 1)
#define ARM_NR_cacheflush (ARM_NR_BASE + 2)
#define ARM_NR_set_tls (ARM_NR_BASE + 5)
#define ARM_NR_get_tls (ARM_NR_BASE + 6)
#define ARM_NR_semihosting 0x123456
#define ARM_NR_thumb_semihosting 0xAB

37
linux-user/cpu_loop-common.h Normal file
View file

@ -0,0 +1,37 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CPU_LOOP_COMMON_H
#define CPU_LOOP_COMMON_H
#include "exec/log.h"
#define EXCP_DUMP(env, fmt, ...) \
do { \
CPUState *cs = ENV_GET_CPU(env); \
fprintf(stderr, fmt , ## __VA_ARGS__); \
cpu_dump_state(cs, stderr, fprintf, 0); \
if (qemu_log_separate()) { \
qemu_log(fmt, ## __VA_ARGS__); \
log_cpu_state(cs, 0); \
} \
} while (0)
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs);
#endif

115
linux-user/cris/cpu_loop.c Normal file
View file

@ -0,0 +1,115 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUCRISState *env)
{
CPUState *cs = CPU(cris_env_get_cpu(env));
int trapnr, ret;
target_siginfo_t info;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0xaa:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->pregs[PR_EDA];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_BREAK:
ret = do_syscall(env,
env->regs[9],
env->regs[10],
env->regs[11],
env->regs[12],
env->regs[13],
env->pregs[7],
env->pregs[11],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 2;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[10] = ret;
}
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
CPUState *cpu = ENV_GET_CPU(env);
TaskState *ts = cpu->opaque;
struct image_info *info = ts->info;
env->regs[0] = regs->r0;
env->regs[1] = regs->r1;
env->regs[2] = regs->r2;
env->regs[3] = regs->r3;
env->regs[4] = regs->r4;
env->regs[5] = regs->r5;
env->regs[6] = regs->r6;
env->regs[7] = regs->r7;
env->regs[8] = regs->r8;
env->regs[9] = regs->r9;
env->regs[10] = regs->r10;
env->regs[11] = regs->r11;
env->regs[12] = regs->r12;
env->regs[13] = regs->r13;
env->regs[14] = info->start_stack;
env->regs[15] = regs->acr;
env->pc = regs->erp;
}

189
linux-user/cris/signal.c Normal file
View file

@ -0,0 +1,189 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
struct target_pt_regs regs; /* needs to be first */
uint32_t oldmask;
uint32_t usp; /* usp before stacking this gunk on it */
};
/* Signal frames. */
struct target_signal_frame {
struct target_sigcontext sc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
uint16_t retcode[4]; /* Trampoline code. */
};
struct rt_signal_frame {
siginfo_t *pinfo;
void *puc;
siginfo_t info;
ucontext_t uc;
uint16_t retcode[4]; /* Trampoline code. */
};
static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
{
__put_user(env->regs[0], &sc->regs.r0);
__put_user(env->regs[1], &sc->regs.r1);
__put_user(env->regs[2], &sc->regs.r2);
__put_user(env->regs[3], &sc->regs.r3);
__put_user(env->regs[4], &sc->regs.r4);
__put_user(env->regs[5], &sc->regs.r5);
__put_user(env->regs[6], &sc->regs.r6);
__put_user(env->regs[7], &sc->regs.r7);
__put_user(env->regs[8], &sc->regs.r8);
__put_user(env->regs[9], &sc->regs.r9);
__put_user(env->regs[10], &sc->regs.r10);
__put_user(env->regs[11], &sc->regs.r11);
__put_user(env->regs[12], &sc->regs.r12);
__put_user(env->regs[13], &sc->regs.r13);
__put_user(env->regs[14], &sc->usp);
__put_user(env->regs[15], &sc->regs.acr);
__put_user(env->pregs[PR_MOF], &sc->regs.mof);
__put_user(env->pregs[PR_SRP], &sc->regs.srp);
__put_user(env->pc, &sc->regs.erp);
}
static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
{
__get_user(env->regs[0], &sc->regs.r0);
__get_user(env->regs[1], &sc->regs.r1);
__get_user(env->regs[2], &sc->regs.r2);
__get_user(env->regs[3], &sc->regs.r3);
__get_user(env->regs[4], &sc->regs.r4);
__get_user(env->regs[5], &sc->regs.r5);
__get_user(env->regs[6], &sc->regs.r6);
__get_user(env->regs[7], &sc->regs.r7);
__get_user(env->regs[8], &sc->regs.r8);
__get_user(env->regs[9], &sc->regs.r9);
__get_user(env->regs[10], &sc->regs.r10);
__get_user(env->regs[11], &sc->regs.r11);
__get_user(env->regs[12], &sc->regs.r12);
__get_user(env->regs[13], &sc->regs.r13);
__get_user(env->regs[14], &sc->usp);
__get_user(env->regs[15], &sc->regs.acr);
__get_user(env->pregs[PR_MOF], &sc->regs.mof);
__get_user(env->pregs[PR_SRP], &sc->regs.srp);
__get_user(env->pc, &sc->regs.erp);
}
static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
{
abi_ulong sp;
/* Align the stack downwards to 4. */
sp = (env->regs[R_SP] & ~3);
return sp - framesize;
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUCRISState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
int i;
frame_addr = get_sigframe(env, sizeof *frame);
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto badframe;
/*
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
* use this trampoline anymore but it sets it up for GDB.
* In QEMU, using the trampoline simplifies things a bit so we use it.
*
* This is movu.w __NR_sigreturn, r9; break 13;
*/
__put_user(0x9c5f, frame->retcode+0);
__put_user(TARGET_NR_sigreturn,
frame->retcode + 1);
__put_user(0xe93d, frame->retcode + 2);
/* Save the mask. */
__put_user(set->sig[0], &frame->sc.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
setup_sigcontext(&frame->sc, env);
/* Move the stack and setup the arguments for the handler. */
env->regs[R_SP] = frame_addr;
env->regs[10] = sig;
env->pc = (unsigned long) ka->_sa_handler;
/* Link SRP so the guest returns through the trampoline. */
env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
unlock_user_struct(frame, frame_addr, 1);
return;
badframe:
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUCRISState *env)
{
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
}
long do_sigreturn(CPUCRISState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
target_sigset_t target_set;
sigset_t set;
int i;
frame_addr = env->regs[R_SP];
trace_user_do_sigreturn(env, frame_addr);
/* Make sure the guest isn't playing games. */
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) {
goto badframe;
}
/* Restore blocked signals */
__get_user(target_set.sig[0], &frame->sc.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
restore_sigcontext(&frame->sc, env);
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUCRISState *env)
{
trace_user_do_rt_sigreturn(env, 0);
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}

2
linux-user/cris/target_signal.h
View file

@ -26,5 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUCRISState *state)
return state->regs[14];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* CRIS_TARGET_SIGNAL_H */

211
linux-user/hppa/cpu_loop.c Normal file
View file

@ -0,0 +1,211 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
static abi_ulong hppa_lws(CPUHPPAState *env)
{
uint32_t which = env->gr[20];
abi_ulong addr = env->gr[26];
abi_ulong old = env->gr[25];
abi_ulong new = env->gr[24];
abi_ulong size, ret;
switch (which) {
default:
return -TARGET_ENOSYS;
case 0: /* elf32 atomic 32bit cmpxchg */
if ((addr & 3) || !access_ok(VERIFY_WRITE, addr, 4)) {
return -TARGET_EFAULT;
}
old = tswap32(old);
new = tswap32(new);
ret = atomic_cmpxchg((uint32_t *)g2h(addr), old, new);
ret = tswap32(ret);
break;
case 2: /* elf32 atomic "new" cmpxchg */
size = env->gr[23];
if (size >= 4) {
return -TARGET_ENOSYS;
}
if (((addr | old | new) & ((1 << size) - 1))
|| !access_ok(VERIFY_WRITE, addr, 1 << size)
|| !access_ok(VERIFY_READ, old, 1 << size)
|| !access_ok(VERIFY_READ, new, 1 << size)) {
return -TARGET_EFAULT;
}
/* Note that below we use host-endian loads so that the cmpxchg
can be host-endian as well. */
switch (size) {
case 0:
old = *(uint8_t *)g2h(old);
new = *(uint8_t *)g2h(new);
ret = atomic_cmpxchg((uint8_t *)g2h(addr), old, new);
ret = ret != old;
break;
case 1:
old = *(uint16_t *)g2h(old);
new = *(uint16_t *)g2h(new);
ret = atomic_cmpxchg((uint16_t *)g2h(addr), old, new);
ret = ret != old;
break;
case 2:
old = *(uint32_t *)g2h(old);
new = *(uint32_t *)g2h(new);
ret = atomic_cmpxchg((uint32_t *)g2h(addr), old, new);
ret = ret != old;
break;
case 3:
{
uint64_t o64, n64, r64;
o64 = *(uint64_t *)g2h(old);
n64 = *(uint64_t *)g2h(new);
#ifdef CONFIG_ATOMIC64
r64 = atomic_cmpxchg__nocheck((uint64_t *)g2h(addr), o64, n64);
ret = r64 != o64;
#else
start_exclusive();
r64 = *(uint64_t *)g2h(addr);
ret = 1;
if (r64 == o64) {
*(uint64_t *)g2h(addr) = n64;
ret = 0;
}
end_exclusive();
#endif
}
break;
}
break;
}
env->gr[28] = ret;
return 0;
}
void cpu_loop(CPUHPPAState *env)
{
CPUState *cs = CPU(hppa_env_get_cpu(env));
target_siginfo_t info;
abi_ulong ret;
int trapnr;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SYSCALL:
ret = do_syscall(env, env->gr[20],
env->gr[26], env->gr[25],
env->gr[24], env->gr[23],
env->gr[22], env->gr[21], 0, 0);
switch (ret) {
default:
env->gr[28] = ret;
/* We arrived here by faking the gateway page. Return. */
env->iaoq_f = env->gr[31];
env->iaoq_b = env->gr[31] + 4;
break;
case -TARGET_ERESTARTSYS:
case -TARGET_QEMU_ESIGRETURN:
break;
}
break;
case EXCP_SYSCALL_LWS:
env->gr[21] = hppa_lws(env);
/* We arrived here by faking the gateway page. Return. */
env->iaoq_f = env->gr[31];
env->iaoq_b = env->gr[31] + 4;
break;
case EXCP_ITLB_MISS:
case EXCP_DTLB_MISS:
case EXCP_NA_ITLB_MISS:
case EXCP_NA_DTLB_MISS:
case EXCP_IMP:
case EXCP_DMP:
case EXCP_DMB:
case EXCP_PAGE_REF:
case EXCP_DMAR:
case EXCP_DMPI:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
info._sifields._sigfault._addr = env->cr[CR_IOR];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_UNALIGN:
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = env->cr[CR_IOR];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ILL:
case EXCP_PRIV_OPR:
case EXCP_PRIV_REG:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->iaoq_f;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_OVERFLOW:
case EXCP_COND:
case EXCP_ASSIST:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = env->iaoq_f;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_DEBUG:
trapnr = gdb_handlesig(cs, TARGET_SIGTRAP);
if (trapnr) {
info.si_signo = trapnr;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, trapnr, QEMU_SI_FAULT, &info);
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
default:
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 1; i < 32; i++) {
env->gr[i] = regs->gr[i];
}
env->iaoq_f = regs->iaoq[0];
env->iaoq_b = regs->iaoq[1];
}

210
linux-user/hppa/signal.c Normal file
View file

@ -0,0 +1,210 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_ulong sc_flags;
abi_ulong sc_gr[32];
uint64_t sc_fr[32];
abi_ulong sc_iasq[2];
abi_ulong sc_iaoq[2];
abi_ulong sc_sar;
};
struct target_ucontext {
abi_uint tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
abi_uint pad[1];
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask;
};
struct target_rt_sigframe {
abi_uint tramp[9];
target_siginfo_t info;
struct target_ucontext uc;
/* hidden location of upper halves of pa2.0 64-bit gregs */
};
static void setup_sigcontext(struct target_sigcontext *sc, CPUArchState *env)
{
int flags = 0;
int i;
/* ??? if on_sig_stack, flags |= 1 (PARISC_SC_FLAG_ONSTACK). */
if (env->iaoq_f < TARGET_PAGE_SIZE) {
/* In the gateway page, executing a syscall. */
flags |= 2; /* PARISC_SC_FLAG_IN_SYSCALL */
__put_user(env->gr[31], &sc->sc_iaoq[0]);
__put_user(env->gr[31] + 4, &sc->sc_iaoq[1]);
} else {
__put_user(env->iaoq_f, &sc->sc_iaoq[0]);
__put_user(env->iaoq_b, &sc->sc_iaoq[1]);
}
__put_user(0, &sc->sc_iasq[0]);
__put_user(0, &sc->sc_iasq[1]);
__put_user(flags, &sc->sc_flags);
__put_user(cpu_hppa_get_psw(env), &sc->sc_gr[0]);
for (i = 1; i < 32; ++i) {
__put_user(env->gr[i], &sc->sc_gr[i]);
}
__put_user((uint64_t)env->fr0_shadow << 32, &sc->sc_fr[0]);
for (i = 1; i < 32; ++i) {
__put_user(env->fr[i], &sc->sc_fr[i]);
}
__put_user(env->cr[CR_SAR], &sc->sc_sar);
}
static void restore_sigcontext(CPUArchState *env, struct target_sigcontext *sc)
{
target_ulong psw;
int i;
__get_user(psw, &sc->sc_gr[0]);
cpu_hppa_put_psw(env, psw);
for (i = 1; i < 32; ++i) {
__get_user(env->gr[i], &sc->sc_gr[i]);
}
for (i = 0; i < 32; ++i) {
__get_user(env->fr[i], &sc->sc_fr[i]);
}
cpu_hppa_loaded_fr0(env);
__get_user(env->iaoq_f, &sc->sc_iaoq[0]);
__get_user(env->iaoq_b, &sc->sc_iaoq[1]);
__get_user(env->cr[CR_SAR], &sc->sc_sar);
}
/* No, this doesn't look right, but it's copied straight from the kernel. */
#define PARISC_RT_SIGFRAME_SIZE32 \
((sizeof(struct target_rt_sigframe) + 48 + 64) & -64)
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUArchState *env)
{
abi_ulong frame_addr, sp, haddr;
struct target_rt_sigframe *frame;
int i;
sp = env->gr[30];
if (ka->sa_flags & TARGET_SA_ONSTACK) {
if (sas_ss_flags(sp) == 0) {
sp = (target_sigaltstack_used.ss_sp + 0x7f) & ~0x3f;
}
}
frame_addr = QEMU_ALIGN_UP(sp, 64);
sp = frame_addr + PARISC_RT_SIGFRAME_SIZE32;
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
tswap_siginfo(&frame->info, info);
frame->uc.tuc_flags = 0;
frame->uc.tuc_link = 0;
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
setup_sigcontext(&frame->uc.tuc_mcontext, env);
__put_user(0x34190000, frame->tramp + 0); /* ldi 0,%r25 */
__put_user(0x3414015a, frame->tramp + 1); /* ldi __NR_rt_sigreturn,%r20 */
__put_user(0xe4008200, frame->tramp + 2); /* be,l 0x100(%sr2,%r0) */
__put_user(0x08000240, frame->tramp + 3); /* nop */
unlock_user_struct(frame, frame_addr, 1);
env->gr[2] = h2g(frame->tramp);
env->gr[30] = sp;
env->gr[26] = sig;
env->gr[25] = h2g(&frame->info);
env->gr[24] = h2g(&frame->uc);
haddr = ka->_sa_handler;
if (haddr & 2) {
/* Function descriptor. */
target_ulong *fdesc, dest;
haddr &= -4;
if (!lock_user_struct(VERIFY_READ, fdesc, haddr, 1)) {
goto give_sigsegv;
}
__get_user(dest, fdesc);
__get_user(env->gr[19], fdesc + 1);
unlock_user_struct(fdesc, haddr, 1);
haddr = dest;
}
env->iaoq_f = haddr;
env->iaoq_b = haddr + 4;
return;
give_sigsegv:
force_sigsegv(sig);
}
long do_rt_sigreturn(CPUArchState *env)
{
abi_ulong frame_addr = env->gr[30] - PARISC_RT_SIGFRAME_SIZE32;
struct target_rt_sigframe *frame;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(env, &frame->uc.tuc_mcontext);
unlock_user_struct(frame, frame_addr, 0);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.tuc_stack),
0, env->gr[30]) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

1
linux-user/hppa/target_signal.h
View file

@ -25,5 +25,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUHPPAState *state)
{
return state->gr[30];
}
#endif /* HPPA_TARGET_SIGNAL_H */

369
linux-user/i386/cpu_loop.c Normal file
View file

@ -0,0 +1,369 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
/***********************************************************/
/* CPUX86 core interface */
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_host_ticks();
}
static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags)
{
unsigned int e1, e2;
uint32_t *p;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
e2 |= flags;
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
static uint64_t *idt_table;
#ifdef TARGET_X86_64
static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
uint64_t addr, unsigned int sel)
{
uint32_t *p, e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
p[2] = tswap32(addr >> 32);
p[3] = 0;
}
/* only dpl matters as we do only user space emulation */
static void set_idt(int n, unsigned int dpl)
{
set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
}
#else
static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
uint32_t addr, unsigned int sel)
{
uint32_t *p, e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
/* only dpl matters as we do only user space emulation */
static void set_idt(int n, unsigned int dpl)
{
set_gate(idt_table + n, 0, dpl, 0, 0);
}
#endif
void cpu_loop(CPUX86State *env)
{
CPUState *cs = CPU(x86_env_get_cpu(env));
int trapnr;
abi_ulong pc;
abi_ulong ret;
target_siginfo_t info;
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case 0x80:
/* linux syscall from int $0x80 */
ret = do_syscall(env,
env->regs[R_EAX],
env->regs[R_EBX],
env->regs[R_ECX],
env->regs[R_EDX],
env->regs[R_ESI],
env->regs[R_EDI],
env->regs[R_EBP],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->eip -= 2;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[R_EAX] = ret;
}
break;
#ifndef TARGET_ABI32
case EXCP_SYSCALL:
/* linux syscall from syscall instruction */
ret = do_syscall(env,
env->regs[R_EAX],
env->regs[R_EDI],
env->regs[R_ESI],
env->regs[R_EDX],
env->regs[10],
env->regs[8],
env->regs[9],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->eip -= 2;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[R_EAX] = ret;
}
break;
#endif
case EXCP0B_NOSEG:
case EXCP0C_STACK:
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP0D_GPF:
/* XXX: potential problem if ABI32 */
#ifndef TARGET_X86_64
if (env->eflags & VM_MASK) {
handle_vm86_fault(env);
} else
#endif
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP0E_PAGE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
if (!(env->error_code & 1))
info.si_code = TARGET_SEGV_MAPERR;
else
info.si_code = TARGET_SEGV_ACCERR;
info._sifields._sigfault._addr = env->cr[2];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP00_DIVZ:
#ifndef TARGET_X86_64
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else
#endif
{
/* division by zero */
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTDIV;
info._sifields._sigfault._addr = env->eip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP01_DB:
case EXCP03_INT3:
#ifndef TARGET_X86_64
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else
#endif
{
info.si_signo = TARGET_SIGTRAP;
info.si_errno = 0;
if (trapnr == EXCP01_DB) {
info.si_code = TARGET_TRAP_BRKPT;
info._sifields._sigfault._addr = env->eip;
} else {
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
}
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP04_INTO:
case EXCP05_BOUND:
#ifndef TARGET_X86_64
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else
#endif
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP06_ILLOP:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->eip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
pc = env->segs[R_CS].base + env->eip;
EXCP_DUMP(env, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
(long)pc, trapnr);
abort();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
env->hflags |= HF_PE_MASK | HF_CPL_MASK;
if (env->features[FEAT_1_EDX] & CPUID_SSE) {
env->cr[4] |= CR4_OSFXSR_MASK;
env->hflags |= HF_OSFXSR_MASK;
}
#ifndef TARGET_ABI32
/* enable 64 bit mode if possible */
if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
exit(EXIT_FAILURE);
}
env->cr[4] |= CR4_PAE_MASK;
env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
env->hflags |= HF_LMA_MASK;
#endif
/* flags setup : we activate the IRQs by default as in user mode */
env->eflags |= IF_MASK;
/* linux register setup */
#ifndef TARGET_ABI32
env->regs[R_EAX] = regs->rax;
env->regs[R_EBX] = regs->rbx;
env->regs[R_ECX] = regs->rcx;
env->regs[R_EDX] = regs->rdx;
env->regs[R_ESI] = regs->rsi;
env->regs[R_EDI] = regs->rdi;
env->regs[R_EBP] = regs->rbp;
env->regs[R_ESP] = regs->rsp;
env->eip = regs->rip;
#else
env->regs[R_EAX] = regs->eax;
env->regs[R_EBX] = regs->ebx;
env->regs[R_ECX] = regs->ecx;
env->regs[R_EDX] = regs->edx;
env->regs[R_ESI] = regs->esi;
env->regs[R_EDI] = regs->edi;
env->regs[R_EBP] = regs->ebp;
env->regs[R_ESP] = regs->esp;
env->eip = regs->eip;
#endif
/* linux interrupt setup */
#ifndef TARGET_ABI32
env->idt.limit = 511;
#else
env->idt.limit = 255;
#endif
env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
idt_table = g2h(env->idt.base);
set_idt(0, 0);
set_idt(1, 0);
set_idt(2, 0);
set_idt(3, 3);
set_idt(4, 3);
set_idt(5, 0);
set_idt(6, 0);
set_idt(7, 0);
set_idt(8, 0);
set_idt(9, 0);
set_idt(10, 0);
set_idt(11, 0);
set_idt(12, 0);
set_idt(13, 0);
set_idt(14, 0);
set_idt(15, 0);
set_idt(16, 0);
set_idt(17, 0);
set_idt(18, 0);
set_idt(19, 0);
set_idt(0x80, 3);
/* linux segment setup */
{
uint64_t *gdt_table;
env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
gdt_table = g2h(env->gdt.base);
#ifdef TARGET_ABI32
write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
#else
/* 64 bit code segment */
write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
DESC_L_MASK |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
#endif
write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
}
cpu_x86_load_seg(env, R_CS, __USER_CS);
cpu_x86_load_seg(env, R_SS, __USER_DS);
#ifdef TARGET_ABI32
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_FS, __USER_DS);
cpu_x86_load_seg(env, R_GS, __USER_DS);
/* This hack makes Wine work... */
env->segs[R_FS].selector = 0;
#else
cpu_x86_load_seg(env, R_DS, 0);
cpu_x86_load_seg(env, R_ES, 0);
cpu_x86_load_seg(env, R_FS, 0);
cpu_x86_load_seg(env, R_GS, 0);
#endif
}

602
linux-user/i386/signal.c Normal file
View file

@ -0,0 +1,602 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
/* from the Linux kernel - /arch/x86/include/uapi/asm/sigcontext.h */
struct target_fpreg {
uint16_t significand[4];
uint16_t exponent;
};
struct target_fpxreg {
uint16_t significand[4];
uint16_t exponent;
uint16_t padding[3];
};
struct target_xmmreg {
uint32_t element[4];
};
struct target_fpstate_32 {
/* Regular FPU environment */
uint32_t cw;
uint32_t sw;
uint32_t tag;
uint32_t ipoff;
uint32_t cssel;
uint32_t dataoff;
uint32_t datasel;
struct target_fpreg st[8];
uint16_t status;
uint16_t magic; /* 0xffff = regular FPU data only */
/* FXSR FPU environment */
uint32_t _fxsr_env[6]; /* FXSR FPU env is ignored */
uint32_t mxcsr;
uint32_t reserved;
struct target_fpxreg fxsr_st[8]; /* FXSR FPU reg data is ignored */
struct target_xmmreg xmm[8];
uint32_t padding[56];
};
struct target_fpstate_64 {
/* FXSAVE format */
uint16_t cw;
uint16_t sw;
uint16_t twd;
uint16_t fop;
uint64_t rip;
uint64_t rdp;
uint32_t mxcsr;
uint32_t mxcsr_mask;
uint32_t st_space[32];
uint32_t xmm_space[64];
uint32_t reserved[24];
};
#ifndef TARGET_X86_64
# define target_fpstate target_fpstate_32
#else
# define target_fpstate target_fpstate_64
#endif
struct target_sigcontext_32 {
uint16_t gs, __gsh;
uint16_t fs, __fsh;
uint16_t es, __esh;
uint16_t ds, __dsh;
uint32_t edi;
uint32_t esi;
uint32_t ebp;
uint32_t esp;
uint32_t ebx;
uint32_t edx;
uint32_t ecx;
uint32_t eax;
uint32_t trapno;
uint32_t err;
uint32_t eip;
uint16_t cs, __csh;
uint32_t eflags;
uint32_t esp_at_signal;
uint16_t ss, __ssh;
uint32_t fpstate; /* pointer */
uint32_t oldmask;
uint32_t cr2;
};
struct target_sigcontext_64 {
uint64_t r8;
uint64_t r9;
uint64_t r10;
uint64_t r11;
uint64_t r12;
uint64_t r13;
uint64_t r14;
uint64_t r15;
uint64_t rdi;
uint64_t rsi;
uint64_t rbp;
uint64_t rbx;
uint64_t rdx;
uint64_t rax;
uint64_t rcx;
uint64_t rsp;
uint64_t rip;
uint64_t eflags;
uint16_t cs;
uint16_t gs;
uint16_t fs;
uint16_t ss;
uint64_t err;
uint64_t trapno;
uint64_t oldmask;
uint64_t cr2;
uint64_t fpstate; /* pointer */
uint64_t padding[8];
};
#ifndef TARGET_X86_64
# define target_sigcontext target_sigcontext_32
#else
# define target_sigcontext target_sigcontext_64
#endif
/* see Linux/include/uapi/asm-generic/ucontext.h */
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
#ifndef TARGET_X86_64
struct sigframe {
abi_ulong pretcode;
int sig;
struct target_sigcontext sc;
struct target_fpstate fpstate;
abi_ulong extramask[TARGET_NSIG_WORDS-1];
char retcode[8];
};
struct rt_sigframe {
abi_ulong pretcode;
int sig;
abi_ulong pinfo;
abi_ulong puc;
struct target_siginfo info;
struct target_ucontext uc;
struct target_fpstate fpstate;
char retcode[8];
};
#else
struct rt_sigframe {
abi_ulong pretcode;
struct target_ucontext uc;
struct target_siginfo info;
struct target_fpstate fpstate;
};
#endif
/*
* Set up a signal frame.
*/
/* XXX: save x87 state */
static void setup_sigcontext(struct target_sigcontext *sc,
struct target_fpstate *fpstate, CPUX86State *env, abi_ulong mask,
abi_ulong fpstate_addr)
{
CPUState *cs = CPU(x86_env_get_cpu(env));
#ifndef TARGET_X86_64
uint16_t magic;
/* already locked in setup_frame() */
__put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
__put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
__put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
__put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
__put_user(env->regs[R_EDI], &sc->edi);
__put_user(env->regs[R_ESI], &sc->esi);
__put_user(env->regs[R_EBP], &sc->ebp);
__put_user(env->regs[R_ESP], &sc->esp);
__put_user(env->regs[R_EBX], &sc->ebx);
__put_user(env->regs[R_EDX], &sc->edx);
__put_user(env->regs[R_ECX], &sc->ecx);
__put_user(env->regs[R_EAX], &sc->eax);
__put_user(cs->exception_index, &sc->trapno);
__put_user(env->error_code, &sc->err);
__put_user(env->eip, &sc->eip);
__put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
__put_user(env->eflags, &sc->eflags);
__put_user(env->regs[R_ESP], &sc->esp_at_signal);
__put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
cpu_x86_fsave(env, fpstate_addr, 1);
fpstate->status = fpstate->sw;
magic = 0xffff;
__put_user(magic, &fpstate->magic);
__put_user(fpstate_addr, &sc->fpstate);
/* non-iBCS2 extensions.. */
__put_user(mask, &sc->oldmask);
__put_user(env->cr[2], &sc->cr2);
#else
__put_user(env->regs[R_EDI], &sc->rdi);
__put_user(env->regs[R_ESI], &sc->rsi);
__put_user(env->regs[R_EBP], &sc->rbp);
__put_user(env->regs[R_ESP], &sc->rsp);
__put_user(env->regs[R_EBX], &sc->rbx);
__put_user(env->regs[R_EDX], &sc->rdx);
__put_user(env->regs[R_ECX], &sc->rcx);
__put_user(env->regs[R_EAX], &sc->rax);
__put_user(env->regs[8], &sc->r8);
__put_user(env->regs[9], &sc->r9);
__put_user(env->regs[10], &sc->r10);
__put_user(env->regs[11], &sc->r11);
__put_user(env->regs[12], &sc->r12);
__put_user(env->regs[13], &sc->r13);
__put_user(env->regs[14], &sc->r14);
__put_user(env->regs[15], &sc->r15);
__put_user(cs->exception_index, &sc->trapno);
__put_user(env->error_code, &sc->err);
__put_user(env->eip, &sc->rip);
__put_user(env->eflags, &sc->eflags);
__put_user(env->segs[R_CS].selector, &sc->cs);
__put_user((uint16_t)0, &sc->gs);
__put_user((uint16_t)0, &sc->fs);
__put_user(env->segs[R_SS].selector, &sc->ss);
__put_user(mask, &sc->oldmask);
__put_user(env->cr[2], &sc->cr2);
/* fpstate_addr must be 16 byte aligned for fxsave */
assert(!(fpstate_addr & 0xf));
cpu_x86_fxsave(env, fpstate_addr);
__put_user(fpstate_addr, &sc->fpstate);
#endif
}
/*
* Determine which stack to use..
*/
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
{
unsigned long esp;
/* Default to using normal stack */
esp = env->regs[R_ESP];
#ifdef TARGET_X86_64
esp -= 128; /* this is the redzone */
#endif
/* This is the X/Open sanctioned signal stack switching. */
if (ka->sa_flags & TARGET_SA_ONSTACK) {
if (sas_ss_flags(esp) == 0) {
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
} else {
#ifndef TARGET_X86_64
/* This is the legacy signal stack switching. */
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
!(ka->sa_flags & TARGET_SA_RESTORER) &&
ka->sa_restorer) {
esp = (unsigned long) ka->sa_restorer;
}
#endif
}
#ifndef TARGET_X86_64
return (esp - frame_size) & -8ul;
#else
return ((esp - frame_size) & (~15ul)) - 8;
#endif
}
#ifndef TARGET_X86_64
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
{
abi_ulong frame_addr;
struct sigframe *frame;
int i;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
__put_user(sig, &frame->sig);
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
frame_addr + offsetof(struct sigframe, fpstate));
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa_flags & TARGET_SA_RESTORER) {
__put_user(ka->sa_restorer, &frame->pretcode);
} else {
uint16_t val16;
abi_ulong retcode_addr;
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
__put_user(retcode_addr, &frame->pretcode);
/* This is popl %eax ; movl $,%eax ; int $0x80 */
val16 = 0xb858;
__put_user(val16, (uint16_t *)(frame->retcode+0));
__put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
val16 = 0x80cd;
__put_user(val16, (uint16_t *)(frame->retcode+6));
}
/* Set up registers for signal handler */
env->regs[R_ESP] = frame_addr;
env->eip = ka->_sa_handler;
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_SS, __USER_DS);
cpu_x86_load_seg(env, R_CS, __USER_CS);
env->eflags &= ~TF_MASK;
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
#endif
/* compare linux/arch/x86/kernel/signal.c:setup_rt_frame() */
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUX86State *env)
{
abi_ulong frame_addr;
#ifndef TARGET_X86_64
abi_ulong addr;
#endif
struct rt_sigframe *frame;
int i;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
/* These fields are only in rt_sigframe on 32 bit */
#ifndef TARGET_X86_64
__put_user(sig, &frame->sig);
addr = frame_addr + offsetof(struct rt_sigframe, info);
__put_user(addr, &frame->pinfo);
addr = frame_addr + offsetof(struct rt_sigframe, uc);
__put_user(addr, &frame->puc);
#endif
if (ka->sa_flags & TARGET_SA_SIGINFO) {
tswap_siginfo(&frame->info, info);
}
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env,
set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate));
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
#ifndef TARGET_X86_64
if (ka->sa_flags & TARGET_SA_RESTORER) {
__put_user(ka->sa_restorer, &frame->pretcode);
} else {
uint16_t val16;
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
__put_user(addr, &frame->pretcode);
/* This is movl $,%eax ; int $0x80 */
__put_user(0xb8, (char *)(frame->retcode+0));
__put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
val16 = 0x80cd;
__put_user(val16, (uint16_t *)(frame->retcode+5));
}
#else
/* XXX: Would be slightly better to return -EFAULT here if test fails
assert(ka->sa_flags & TARGET_SA_RESTORER); */
__put_user(ka->sa_restorer, &frame->pretcode);
#endif
/* Set up registers for signal handler */
env->regs[R_ESP] = frame_addr;
env->eip = ka->_sa_handler;
#ifndef TARGET_X86_64
env->regs[R_EAX] = sig;
env->regs[R_EDX] = (unsigned long)&frame->info;
env->regs[R_ECX] = (unsigned long)&frame->uc;
#else
env->regs[R_EAX] = 0;
env->regs[R_EDI] = sig;
env->regs[R_ESI] = (unsigned long)&frame->info;
env->regs[R_EDX] = (unsigned long)&frame->uc;
#endif
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_CS, __USER_CS);
cpu_x86_load_seg(env, R_SS, __USER_DS);
env->eflags &= ~TF_MASK;
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
static int
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
{
unsigned int err = 0;
abi_ulong fpstate_addr;
unsigned int tmpflags;
#ifndef TARGET_X86_64
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
env->regs[R_EDI] = tswapl(sc->edi);
env->regs[R_ESI] = tswapl(sc->esi);
env->regs[R_EBP] = tswapl(sc->ebp);
env->regs[R_ESP] = tswapl(sc->esp);
env->regs[R_EBX] = tswapl(sc->ebx);
env->regs[R_EDX] = tswapl(sc->edx);
env->regs[R_ECX] = tswapl(sc->ecx);
env->regs[R_EAX] = tswapl(sc->eax);
env->eip = tswapl(sc->eip);
#else
env->regs[8] = tswapl(sc->r8);
env->regs[9] = tswapl(sc->r9);
env->regs[10] = tswapl(sc->r10);
env->regs[11] = tswapl(sc->r11);
env->regs[12] = tswapl(sc->r12);
env->regs[13] = tswapl(sc->r13);
env->regs[14] = tswapl(sc->r14);
env->regs[15] = tswapl(sc->r15);
env->regs[R_EDI] = tswapl(sc->rdi);
env->regs[R_ESI] = tswapl(sc->rsi);
env->regs[R_EBP] = tswapl(sc->rbp);
env->regs[R_EBX] = tswapl(sc->rbx);
env->regs[R_EDX] = tswapl(sc->rdx);
env->regs[R_EAX] = tswapl(sc->rax);
env->regs[R_ECX] = tswapl(sc->rcx);
env->regs[R_ESP] = tswapl(sc->rsp);
env->eip = tswapl(sc->rip);
#endif
cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
tmpflags = tswapl(sc->eflags);
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
// regs->orig_eax = -1; /* disable syscall checks */
fpstate_addr = tswapl(sc->fpstate);
if (fpstate_addr != 0) {
if (!access_ok(VERIFY_READ, fpstate_addr,
sizeof(struct target_fpstate)))
goto badframe;
#ifndef TARGET_X86_64
cpu_x86_frstor(env, fpstate_addr, 1);
#else
cpu_x86_fxrstor(env, fpstate_addr);
#endif
}
return err;
badframe:
return 1;
}
/* Note: there is no sigreturn on x86_64, there is only rt_sigreturn */
#ifndef TARGET_X86_64
long do_sigreturn(CPUX86State *env)
{
struct sigframe *frame;
abi_ulong frame_addr = env->regs[R_ESP] - 8;
target_sigset_t target_set;
sigset_t set;
int i;
trace_user_do_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
/* set blocked signals */
__get_user(target_set.sig[0], &frame->sc.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
/* restore registers */
if (restore_sigcontext(env, &frame->sc))
goto badframe;
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
#endif
long do_rt_sigreturn(CPUX86State *env)
{
abi_ulong frame_addr;
struct rt_sigframe *frame;
sigset_t set;
frame_addr = env->regs[R_ESP] - sizeof(abi_ulong);
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
goto badframe;
}
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

1
linux-user/i386/target_signal.h
View file

@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUX86State *state)
return state->regs[R_ESP];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* I386_TARGET_SIGNAL_H */

170
linux-user/m68k/cpu_loop.c Normal file
View file

@ -0,0 +1,170 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUM68KState *env)
{
CPUState *cs = CPU(m68k_env_get_cpu(env));
int trapnr;
unsigned int n;
target_siginfo_t info;
TaskState *ts = cs->opaque;
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_ILLEGAL:
{
if (ts->sim_syscalls) {
uint16_t nr;
get_user_u16(nr, env->pc + 2);
env->pc += 4;
do_m68k_simcall(env, nr);
} else {
goto do_sigill;
}
}
break;
case EXCP_HALT_INSN:
/* Semihosing syscall. */
env->pc += 4;
do_m68k_semihosting(env, env->dregs[0]);
break;
case EXCP_LINEA:
case EXCP_LINEF:
case EXCP_UNSUPPORTED:
do_sigill:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_CHK:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTOVF;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_DIV0:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTDIV;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_TRAP0:
{
abi_long ret;
ts->sim_syscalls = 0;
n = env->dregs[0];
env->pc += 2;
ret = do_syscall(env,
n,
env->dregs[1],
env->dregs[2],
env->dregs[3],
env->dregs[4],
env->dregs[5],
env->aregs[0],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 2;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->dregs[0] = ret;
}
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ACCESS:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->mmu.ar;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
abort();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
CPUState *cpu = ENV_GET_CPU(env);
TaskState *ts = cpu->opaque;
struct image_info *info = ts->info;
env->pc = regs->pc;
env->dregs[0] = regs->d0;
env->dregs[1] = regs->d1;
env->dregs[2] = regs->d2;
env->dregs[3] = regs->d3;
env->dregs[4] = regs->d4;
env->dregs[5] = regs->d5;
env->dregs[6] = regs->d6;
env->dregs[7] = regs->d7;
env->aregs[0] = regs->a0;
env->aregs[1] = regs->a1;
env->aregs[2] = regs->a2;
env->aregs[3] = regs->a3;
env->aregs[4] = regs->a4;
env->aregs[5] = regs->a5;
env->aregs[6] = regs->a6;
env->aregs[7] = regs->usp;
env->sr = regs->sr;
ts->sim_syscalls = 1;
ts->stack_base = info->start_stack;
ts->heap_base = info->brk;
/* This will be filled in on the first SYS_HEAPINFO call. */
ts->heap_limit = 0;
}

428
linux-user/m68k/signal.c Normal file
View file

@ -0,0 +1,428 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_ulong sc_mask;
abi_ulong sc_usp;
abi_ulong sc_d0;
abi_ulong sc_d1;
abi_ulong sc_a0;
abi_ulong sc_a1;
unsigned short sc_sr;
abi_ulong sc_pc;
};
struct target_sigframe
{
abi_ulong pretcode;
int sig;
int code;
abi_ulong psc;
char retcode[8];
abi_ulong extramask[TARGET_NSIG_WORDS-1];
struct target_sigcontext sc;
};
typedef int target_greg_t;
#define TARGET_NGREG 18
typedef target_greg_t target_gregset_t[TARGET_NGREG];
typedef struct target_fpregset {
int f_fpcntl[3];
int f_fpregs[8*3];
} target_fpregset_t;
struct target_mcontext {
int version;
target_gregset_t gregs;
target_fpregset_t fpregs;
};
#define TARGET_MCONTEXT_VERSION 2
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_mcontext tuc_mcontext;
abi_long tuc_filler[80];
target_sigset_t tuc_sigmask;
};
struct target_rt_sigframe
{
abi_ulong pretcode;
int sig;
abi_ulong pinfo;
abi_ulong puc;
char retcode[8];
struct target_siginfo info;
struct target_ucontext uc;
};
static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
abi_ulong mask)
{
uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);
__put_user(mask, &sc->sc_mask);
__put_user(env->aregs[7], &sc->sc_usp);
__put_user(env->dregs[0], &sc->sc_d0);
__put_user(env->dregs[1], &sc->sc_d1);
__put_user(env->aregs[0], &sc->sc_a0);
__put_user(env->aregs[1], &sc->sc_a1);
__put_user(sr, &sc->sc_sr);
__put_user(env->pc, &sc->sc_pc);
}
static void
restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc)
{
int temp;
__get_user(env->aregs[7], &sc->sc_usp);
__get_user(env->dregs[0], &sc->sc_d0);
__get_user(env->dregs[1], &sc->sc_d1);
__get_user(env->aregs[0], &sc->sc_a0);
__get_user(env->aregs[1], &sc->sc_a1);
__get_user(env->pc, &sc->sc_pc);
__get_user(temp, &sc->sc_sr);
cpu_m68k_set_ccr(env, temp);
}
/*
* Determine which stack to use..
*/
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
size_t frame_size)
{
unsigned long sp;
sp = regs->aregs[7];
/* This is the X/Open sanctioned signal stack switching. */
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return ((sp - frame_size) & -8UL);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUM68KState *env)
{
struct target_sigframe *frame;
abi_ulong frame_addr;
abi_ulong retcode_addr;
abi_ulong sc_addr;
int i;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
__put_user(sig, &frame->sig);
sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
__put_user(sc_addr, &frame->psc);
setup_sigcontext(&frame->sc, env, set->sig[0]);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
/* Set up to return from userspace. */
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
__put_user(retcode_addr, &frame->pretcode);
/* moveq #,d0; trap #0 */
__put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
(uint32_t *)(frame->retcode));
/* Set up to return from userspace */
env->aregs[7] = frame_addr;
env->pc = ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
CPUM68KState *env)
{
int i;
target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
__put_user(env->fpcr, &fpregs->f_fpcntl[0]);
__put_user(env->fpsr, &fpregs->f_fpcntl[1]);
/* fpiar is not emulated */
for (i = 0; i < 8; i++) {
uint32_t high = env->fregs[i].d.high << 16;
__put_user(high, &fpregs->f_fpregs[i * 3]);
__put_user(env->fregs[i].d.low,
(uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
}
}
static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
CPUM68KState *env)
{
target_greg_t *gregs = uc->tuc_mcontext.gregs;
uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);
__put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
__put_user(env->dregs[0], &gregs[0]);
__put_user(env->dregs[1], &gregs[1]);
__put_user(env->dregs[2], &gregs[2]);
__put_user(env->dregs[3], &gregs[3]);
__put_user(env->dregs[4], &gregs[4]);
__put_user(env->dregs[5], &gregs[5]);
__put_user(env->dregs[6], &gregs[6]);
__put_user(env->dregs[7], &gregs[7]);
__put_user(env->aregs[0], &gregs[8]);
__put_user(env->aregs[1], &gregs[9]);
__put_user(env->aregs[2], &gregs[10]);
__put_user(env->aregs[3], &gregs[11]);
__put_user(env->aregs[4], &gregs[12]);
__put_user(env->aregs[5], &gregs[13]);
__put_user(env->aregs[6], &gregs[14]);
__put_user(env->aregs[7], &gregs[15]);
__put_user(env->pc, &gregs[16]);
__put_user(sr, &gregs[17]);
target_rt_save_fpu_state(uc, env);
return 0;
}
static inline void target_rt_restore_fpu_state(CPUM68KState *env,
struct target_ucontext *uc)
{
int i;
target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
uint32_t fpcr;
__get_user(fpcr, &fpregs->f_fpcntl[0]);
cpu_m68k_set_fpcr(env, fpcr);
__get_user(env->fpsr, &fpregs->f_fpcntl[1]);
/* fpiar is not emulated */
for (i = 0; i < 8; i++) {
uint32_t high;
__get_user(high, &fpregs->f_fpregs[i * 3]);
env->fregs[i].d.high = high >> 16;
__get_user(env->fregs[i].d.low,
(uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
}
}
static inline int target_rt_restore_ucontext(CPUM68KState *env,
struct target_ucontext *uc)
{
int temp;
target_greg_t *gregs = uc->tuc_mcontext.gregs;
__get_user(temp, &uc->tuc_mcontext.version);
if (temp != TARGET_MCONTEXT_VERSION)
goto badframe;
/* restore passed registers */
__get_user(env->dregs[0], &gregs[0]);
__get_user(env->dregs[1], &gregs[1]);
__get_user(env->dregs[2], &gregs[2]);
__get_user(env->dregs[3], &gregs[3]);
__get_user(env->dregs[4], &gregs[4]);
__get_user(env->dregs[5], &gregs[5]);
__get_user(env->dregs[6], &gregs[6]);
__get_user(env->dregs[7], &gregs[7]);
__get_user(env->aregs[0], &gregs[8]);
__get_user(env->aregs[1], &gregs[9]);
__get_user(env->aregs[2], &gregs[10]);
__get_user(env->aregs[3], &gregs[11]);
__get_user(env->aregs[4], &gregs[12]);
__get_user(env->aregs[5], &gregs[13]);
__get_user(env->aregs[6], &gregs[14]);
__get_user(env->aregs[7], &gregs[15]);
__get_user(env->pc, &gregs[16]);
__get_user(temp, &gregs[17]);
cpu_m68k_set_ccr(env, temp);
target_rt_restore_fpu_state(env, uc);
return 0;
badframe:
return 1;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUM68KState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
abi_ulong retcode_addr;
abi_ulong info_addr;
abi_ulong uc_addr;
int err = 0;
int i;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
__put_user(sig, &frame->sig);
info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
__put_user(info_addr, &frame->pinfo);
uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
__put_user(uc_addr, &frame->puc);
tswap_siginfo(&frame->info, info);
/* Create the ucontext */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->aregs[7]),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
err |= target_rt_setup_ucontext(&frame->uc, env);
if (err)
goto give_sigsegv;
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
/* Set up to return from userspace. */
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
__put_user(retcode_addr, &frame->pretcode);
/* moveq #,d0; notb d0; trap #0 */
__put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
(uint32_t *)(frame->retcode + 0));
__put_user(0x4e40, (uint16_t *)(frame->retcode + 4));
if (err)
goto give_sigsegv;
/* Set up to return from userspace */
env->aregs[7] = frame_addr;
env->pc = ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
long do_sigreturn(CPUM68KState *env)
{
struct target_sigframe *frame;
abi_ulong frame_addr = env->aregs[7] - 4;
target_sigset_t target_set;
sigset_t set;
int i;
trace_user_do_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
/* set blocked signals */
__get_user(target_set.sig[0], &frame->sc.sc_mask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
/* restore registers */
restore_sigcontext(env, &frame->sc);
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUM68KState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr = env->aregs[7] - 4;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
/* restore registers */
if (target_rt_restore_ucontext(env, &frame->uc))
goto badframe;
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

2
linux-user/m68k/target_signal.h
View file

@ -26,5 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUM68KState *state)
return state->aregs[7];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* M68K_TARGET_SIGNAL_H */

4334
linux-user/main.c
View file

File diff suppressed because it is too large Load diff

176
linux-user/microblaze/cpu_loop.c Normal file
View file

@ -0,0 +1,176 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUMBState *env)
{
CPUState *cs = CPU(mb_env_get_cpu(env));
int trapnr, ret;
target_siginfo_t info;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0xaa:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_BREAK:
/* Return address is 4 bytes after the call. */
env->regs[14] += 4;
env->sregs[SR_PC] = env->regs[14];
ret = do_syscall(env,
env->regs[12],
env->regs[5],
env->regs[6],
env->regs[7],
env->regs[8],
env->regs[9],
env->regs[10],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
/* Wind back to before the syscall. */
env->sregs[SR_PC] -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[3] = ret;
}
/* All syscall exits result in guest r14 being equal to the
* PC we return to, because the kernel syscall exit "rtbd" does
* this. (This is true even for sigreturn(); note that r14 is
* not a userspace-usable register, as the kernel may clobber it
* at any point.)
*/
env->regs[14] = env->sregs[SR_PC];
break;
case EXCP_HW_EXCP:
env->regs[17] = env->sregs[SR_PC] + 4;
if (env->iflags & D_FLAG) {
env->sregs[SR_ESR] |= 1 << 12;
env->sregs[SR_PC] -= 4;
/* FIXME: if branch was immed, replay the imm as well. */
}
env->iflags &= ~(IMM_FLAG | D_FLAG);
switch (env->sregs[SR_ESR] & 31) {
case ESR_EC_DIVZERO:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_FLTDIV;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case ESR_EC_FPU:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
if (env->sregs[SR_FSR] & FSR_IO) {
info.si_code = TARGET_FPE_FLTINV;
}
if (env->sregs[SR_FSR] & FSR_DZ) {
info.si_code = TARGET_FPE_FLTDIV;
}
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
default:
printf ("Unhandled hw-exception: 0x%x\n",
env->sregs[SR_ESR] & ESR_EC_MASK);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
break;
}
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->regs[0] = regs->r0;
env->regs[1] = regs->r1;
env->regs[2] = regs->r2;
env->regs[3] = regs->r3;
env->regs[4] = regs->r4;
env->regs[5] = regs->r5;
env->regs[6] = regs->r6;
env->regs[7] = regs->r7;
env->regs[8] = regs->r8;
env->regs[9] = regs->r9;
env->regs[10] = regs->r10;
env->regs[11] = regs->r11;
env->regs[12] = regs->r12;
env->regs[13] = regs->r13;
env->regs[14] = regs->r14;
env->regs[15] = regs->r15;
env->regs[16] = regs->r16;
env->regs[17] = regs->r17;
env->regs[18] = regs->r18;
env->regs[19] = regs->r19;
env->regs[20] = regs->r20;
env->regs[21] = regs->r21;
env->regs[22] = regs->r22;
env->regs[23] = regs->r23;
env->regs[24] = regs->r24;
env->regs[25] = regs->r25;
env->regs[26] = regs->r26;
env->regs[27] = regs->r27;
env->regs[28] = regs->r28;
env->regs[29] = regs->r29;
env->regs[30] = regs->r30;
env->regs[31] = regs->r31;
env->sregs[SR_PC] = regs->pc;
}

248
linux-user/microblaze/signal.c Normal file
View file

@ -0,0 +1,248 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
struct target_pt_regs regs; /* needs to be first */
uint32_t oldmask;
};
struct target_stack_t {
abi_ulong ss_sp;
int ss_flags;
unsigned int ss_size;
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
struct target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
};
/* Signal frames. */
struct target_signal_frame {
struct target_ucontext uc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
uint32_t tramp[2];
};
struct rt_signal_frame {
siginfo_t info;
ucontext_t uc;
uint32_t tramp[2];
};
static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
{
__put_user(env->regs[0], &sc->regs.r0);
__put_user(env->regs[1], &sc->regs.r1);
__put_user(env->regs[2], &sc->regs.r2);
__put_user(env->regs[3], &sc->regs.r3);
__put_user(env->regs[4], &sc->regs.r4);
__put_user(env->regs[5], &sc->regs.r5);
__put_user(env->regs[6], &sc->regs.r6);
__put_user(env->regs[7], &sc->regs.r7);
__put_user(env->regs[8], &sc->regs.r8);
__put_user(env->regs[9], &sc->regs.r9);
__put_user(env->regs[10], &sc->regs.r10);
__put_user(env->regs[11], &sc->regs.r11);
__put_user(env->regs[12], &sc->regs.r12);
__put_user(env->regs[13], &sc->regs.r13);
__put_user(env->regs[14], &sc->regs.r14);
__put_user(env->regs[15], &sc->regs.r15);
__put_user(env->regs[16], &sc->regs.r16);
__put_user(env->regs[17], &sc->regs.r17);
__put_user(env->regs[18], &sc->regs.r18);
__put_user(env->regs[19], &sc->regs.r19);
__put_user(env->regs[20], &sc->regs.r20);
__put_user(env->regs[21], &sc->regs.r21);
__put_user(env->regs[22], &sc->regs.r22);
__put_user(env->regs[23], &sc->regs.r23);
__put_user(env->regs[24], &sc->regs.r24);
__put_user(env->regs[25], &sc->regs.r25);
__put_user(env->regs[26], &sc->regs.r26);
__put_user(env->regs[27], &sc->regs.r27);
__put_user(env->regs[28], &sc->regs.r28);
__put_user(env->regs[29], &sc->regs.r29);
__put_user(env->regs[30], &sc->regs.r30);
__put_user(env->regs[31], &sc->regs.r31);
__put_user(env->sregs[SR_PC], &sc->regs.pc);
}
static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
{
__get_user(env->regs[0], &sc->regs.r0);
__get_user(env->regs[1], &sc->regs.r1);
__get_user(env->regs[2], &sc->regs.r2);
__get_user(env->regs[3], &sc->regs.r3);
__get_user(env->regs[4], &sc->regs.r4);
__get_user(env->regs[5], &sc->regs.r5);
__get_user(env->regs[6], &sc->regs.r6);
__get_user(env->regs[7], &sc->regs.r7);
__get_user(env->regs[8], &sc->regs.r8);
__get_user(env->regs[9], &sc->regs.r9);
__get_user(env->regs[10], &sc->regs.r10);
__get_user(env->regs[11], &sc->regs.r11);
__get_user(env->regs[12], &sc->regs.r12);
__get_user(env->regs[13], &sc->regs.r13);
__get_user(env->regs[14], &sc->regs.r14);
__get_user(env->regs[15], &sc->regs.r15);
__get_user(env->regs[16], &sc->regs.r16);
__get_user(env->regs[17], &sc->regs.r17);
__get_user(env->regs[18], &sc->regs.r18);
__get_user(env->regs[19], &sc->regs.r19);
__get_user(env->regs[20], &sc->regs.r20);
__get_user(env->regs[21], &sc->regs.r21);
__get_user(env->regs[22], &sc->regs.r22);
__get_user(env->regs[23], &sc->regs.r23);
__get_user(env->regs[24], &sc->regs.r24);
__get_user(env->regs[25], &sc->regs.r25);
__get_user(env->regs[26], &sc->regs.r26);
__get_user(env->regs[27], &sc->regs.r27);
__get_user(env->regs[28], &sc->regs.r28);
__get_user(env->regs[29], &sc->regs.r29);
__get_user(env->regs[30], &sc->regs.r30);
__get_user(env->regs[31], &sc->regs.r31);
__get_user(env->sregs[SR_PC], &sc->regs.pc);
}
static abi_ulong get_sigframe(struct target_sigaction *ka,
CPUMBState *env, int frame_size)
{
abi_ulong sp = env->regs[1];
if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return ((sp - frame_size) & -8UL);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUMBState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
int i;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto badframe;
/* Save the mask. */
__put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
setup_sigcontext(&frame->uc.tuc_mcontext, env);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
/* minus 8 is offset to cater for "rtsd r15,8" offset */
if (ka->sa_flags & TARGET_SA_RESTORER) {
env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
} else {
uint32_t t;
/* Note, these encodings are _big endian_! */
/* addi r12, r0, __NR_sigreturn */
t = 0x31800000UL | TARGET_NR_sigreturn;
__put_user(t, frame->tramp + 0);
/* brki r14, 0x8 */
t = 0xb9cc0008UL;
__put_user(t, frame->tramp + 1);
/* Return from sighandler will jump to the tramp.
Negative 8 offset because return is rtsd r15, 8 */
env->regs[15] = frame_addr + offsetof(struct target_signal_frame, tramp)
- 8;
}
/* Set up registers for signal handler */
env->regs[1] = frame_addr;
/* Signal handler args: */
env->regs[5] = sig; /* Arg 0: signum */
env->regs[6] = 0;
/* arg 1: sigcontext */
env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
/* Offset of 4 to handle microblaze rtid r14, 0 */
env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
unlock_user_struct(frame, frame_addr, 1);
return;
badframe:
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUMBState *env)
{
fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
}
long do_sigreturn(CPUMBState *env)
{
struct target_signal_frame *frame;
abi_ulong frame_addr;
target_sigset_t target_set;
sigset_t set;
int i;
frame_addr = env->regs[R_SP];
trace_user_do_sigreturn(env, frame_addr);
/* Make sure the guest isn't playing games. */
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
goto badframe;
/* Restore blocked signals */
__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
restore_sigcontext(&frame->uc.tuc_mcontext, env);
/* We got here through a sigreturn syscall, our path back is via an
rtb insn so setup r14 for that. */
env->regs[14] = env->sregs[SR_PC];
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUMBState *env)
{
trace_user_do_rt_sigreturn(env, 0);
fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}

2
linux-user/microblaze/target_signal.h
View file

@ -26,5 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUMBState *state)
return state->regs[1];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* MICROBLAZE_TARGET_SIGNAL_H */

749
linux-user/mips/cpu_loop.c Normal file
View file

@ -0,0 +1,749 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
#include "elf.h"
# ifdef TARGET_ABI_MIPSO32
# define MIPS_SYS(name, args) args,
static const uint8_t mips_syscall_args[] = {
MIPS_SYS(sys_syscall , 8) /* 4000 */
MIPS_SYS(sys_exit , 1)
MIPS_SYS(sys_fork , 0)
MIPS_SYS(sys_read , 3)
MIPS_SYS(sys_write , 3)
MIPS_SYS(sys_open , 3) /* 4005 */
MIPS_SYS(sys_close , 1)
MIPS_SYS(sys_waitpid , 3)
MIPS_SYS(sys_creat , 2)
MIPS_SYS(sys_link , 2)
MIPS_SYS(sys_unlink , 1) /* 4010 */
MIPS_SYS(sys_execve , 0)
MIPS_SYS(sys_chdir , 1)
MIPS_SYS(sys_time , 1)
MIPS_SYS(sys_mknod , 3)
MIPS_SYS(sys_chmod , 2) /* 4015 */
MIPS_SYS(sys_lchown , 3)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_ni_syscall , 0) /* was sys_stat */
MIPS_SYS(sys_lseek , 3)
MIPS_SYS(sys_getpid , 0) /* 4020 */
MIPS_SYS(sys_mount , 5)
MIPS_SYS(sys_umount , 1)
MIPS_SYS(sys_setuid , 1)
MIPS_SYS(sys_getuid , 0)
MIPS_SYS(sys_stime , 1) /* 4025 */
MIPS_SYS(sys_ptrace , 4)
MIPS_SYS(sys_alarm , 1)
MIPS_SYS(sys_ni_syscall , 0) /* was sys_fstat */
MIPS_SYS(sys_pause , 0)
MIPS_SYS(sys_utime , 2) /* 4030 */
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_access , 2)
MIPS_SYS(sys_nice , 1)
MIPS_SYS(sys_ni_syscall , 0) /* 4035 */
MIPS_SYS(sys_sync , 0)
MIPS_SYS(sys_kill , 2)
MIPS_SYS(sys_rename , 2)
MIPS_SYS(sys_mkdir , 2)
MIPS_SYS(sys_rmdir , 1) /* 4040 */
MIPS_SYS(sys_dup , 1)
MIPS_SYS(sys_pipe , 0)
MIPS_SYS(sys_times , 1)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_brk , 1) /* 4045 */
MIPS_SYS(sys_setgid , 1)
MIPS_SYS(sys_getgid , 0)
MIPS_SYS(sys_ni_syscall , 0) /* was signal(2) */
MIPS_SYS(sys_geteuid , 0)
MIPS_SYS(sys_getegid , 0) /* 4050 */
MIPS_SYS(sys_acct , 0)
MIPS_SYS(sys_umount2 , 2)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_ioctl , 3)
MIPS_SYS(sys_fcntl , 3) /* 4055 */
MIPS_SYS(sys_ni_syscall , 2)
MIPS_SYS(sys_setpgid , 2)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_olduname , 1)
MIPS_SYS(sys_umask , 1) /* 4060 */
MIPS_SYS(sys_chroot , 1)
MIPS_SYS(sys_ustat , 2)
MIPS_SYS(sys_dup2 , 2)
MIPS_SYS(sys_getppid , 0)
MIPS_SYS(sys_getpgrp , 0) /* 4065 */
MIPS_SYS(sys_setsid , 0)
MIPS_SYS(sys_sigaction , 3)
MIPS_SYS(sys_sgetmask , 0)
MIPS_SYS(sys_ssetmask , 1)
MIPS_SYS(sys_setreuid , 2) /* 4070 */
MIPS_SYS(sys_setregid , 2)
MIPS_SYS(sys_sigsuspend , 0)
MIPS_SYS(sys_sigpending , 1)
MIPS_SYS(sys_sethostname , 2)
MIPS_SYS(sys_setrlimit , 2) /* 4075 */
MIPS_SYS(sys_getrlimit , 2)
MIPS_SYS(sys_getrusage , 2)
MIPS_SYS(sys_gettimeofday, 2)
MIPS_SYS(sys_settimeofday, 2)
MIPS_SYS(sys_getgroups , 2) /* 4080 */
MIPS_SYS(sys_setgroups , 2)
MIPS_SYS(sys_ni_syscall , 0) /* old_select */
MIPS_SYS(sys_symlink , 2)
MIPS_SYS(sys_ni_syscall , 0) /* was sys_lstat */
MIPS_SYS(sys_readlink , 3) /* 4085 */
MIPS_SYS(sys_uselib , 1)
MIPS_SYS(sys_swapon , 2)
MIPS_SYS(sys_reboot , 3)
MIPS_SYS(old_readdir , 3)
MIPS_SYS(old_mmap , 6) /* 4090 */
MIPS_SYS(sys_munmap , 2)
MIPS_SYS(sys_truncate , 2)
MIPS_SYS(sys_ftruncate , 2)
MIPS_SYS(sys_fchmod , 2)
MIPS_SYS(sys_fchown , 3) /* 4095 */
MIPS_SYS(sys_getpriority , 2)
MIPS_SYS(sys_setpriority , 3)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_statfs , 2)
MIPS_SYS(sys_fstatfs , 2) /* 4100 */
MIPS_SYS(sys_ni_syscall , 0) /* was ioperm(2) */
MIPS_SYS(sys_socketcall , 2)
MIPS_SYS(sys_syslog , 3)
MIPS_SYS(sys_setitimer , 3)
MIPS_SYS(sys_getitimer , 2) /* 4105 */
MIPS_SYS(sys_newstat , 2)
MIPS_SYS(sys_newlstat , 2)
MIPS_SYS(sys_newfstat , 2)
MIPS_SYS(sys_uname , 1)
MIPS_SYS(sys_ni_syscall , 0) /* 4110 was iopl(2) */
MIPS_SYS(sys_vhangup , 0)
MIPS_SYS(sys_ni_syscall , 0) /* was sys_idle() */
MIPS_SYS(sys_ni_syscall , 0) /* was sys_vm86 */
MIPS_SYS(sys_wait4 , 4)
MIPS_SYS(sys_swapoff , 1) /* 4115 */
MIPS_SYS(sys_sysinfo , 1)
MIPS_SYS(sys_ipc , 6)
MIPS_SYS(sys_fsync , 1)
MIPS_SYS(sys_sigreturn , 0)
MIPS_SYS(sys_clone , 6) /* 4120 */
MIPS_SYS(sys_setdomainname, 2)
MIPS_SYS(sys_newuname , 1)
MIPS_SYS(sys_ni_syscall , 0) /* sys_modify_ldt */
MIPS_SYS(sys_adjtimex , 1)
MIPS_SYS(sys_mprotect , 3) /* 4125 */
MIPS_SYS(sys_sigprocmask , 3)
MIPS_SYS(sys_ni_syscall , 0) /* was create_module */
MIPS_SYS(sys_init_module , 5)
MIPS_SYS(sys_delete_module, 1)
MIPS_SYS(sys_ni_syscall , 0) /* 4130 was get_kernel_syms */
MIPS_SYS(sys_quotactl , 0)
MIPS_SYS(sys_getpgid , 1)
MIPS_SYS(sys_fchdir , 1)
MIPS_SYS(sys_bdflush , 2)
MIPS_SYS(sys_sysfs , 3) /* 4135 */
MIPS_SYS(sys_personality , 1)
MIPS_SYS(sys_ni_syscall , 0) /* for afs_syscall */
MIPS_SYS(sys_setfsuid , 1)
MIPS_SYS(sys_setfsgid , 1)
MIPS_SYS(sys_llseek , 5) /* 4140 */
MIPS_SYS(sys_getdents , 3)
MIPS_SYS(sys_select , 5)
MIPS_SYS(sys_flock , 2)
MIPS_SYS(sys_msync , 3)
MIPS_SYS(sys_readv , 3) /* 4145 */
MIPS_SYS(sys_writev , 3)
MIPS_SYS(sys_cacheflush , 3)
MIPS_SYS(sys_cachectl , 3)
MIPS_SYS(sys_sysmips , 4)
MIPS_SYS(sys_ni_syscall , 0) /* 4150 */
MIPS_SYS(sys_getsid , 1)
MIPS_SYS(sys_fdatasync , 0)
MIPS_SYS(sys_sysctl , 1)
MIPS_SYS(sys_mlock , 2)
MIPS_SYS(sys_munlock , 2) /* 4155 */
MIPS_SYS(sys_mlockall , 1)
MIPS_SYS(sys_munlockall , 0)
MIPS_SYS(sys_sched_setparam, 2)
MIPS_SYS(sys_sched_getparam, 2)
MIPS_SYS(sys_sched_setscheduler, 3) /* 4160 */
MIPS_SYS(sys_sched_getscheduler, 1)
MIPS_SYS(sys_sched_yield , 0)
MIPS_SYS(sys_sched_get_priority_max, 1)
MIPS_SYS(sys_sched_get_priority_min, 1)
MIPS_SYS(sys_sched_rr_get_interval, 2) /* 4165 */
MIPS_SYS(sys_nanosleep, 2)
MIPS_SYS(sys_mremap , 5)
MIPS_SYS(sys_accept , 3)
MIPS_SYS(sys_bind , 3)
MIPS_SYS(sys_connect , 3) /* 4170 */
MIPS_SYS(sys_getpeername , 3)
MIPS_SYS(sys_getsockname , 3)
MIPS_SYS(sys_getsockopt , 5)
MIPS_SYS(sys_listen , 2)
MIPS_SYS(sys_recv , 4) /* 4175 */
MIPS_SYS(sys_recvfrom , 6)
MIPS_SYS(sys_recvmsg , 3)
MIPS_SYS(sys_send , 4)
MIPS_SYS(sys_sendmsg , 3)
MIPS_SYS(sys_sendto , 6) /* 4180 */
MIPS_SYS(sys_setsockopt , 5)
MIPS_SYS(sys_shutdown , 2)
MIPS_SYS(sys_socket , 3)
MIPS_SYS(sys_socketpair , 4)
MIPS_SYS(sys_setresuid , 3) /* 4185 */
MIPS_SYS(sys_getresuid , 3)
MIPS_SYS(sys_ni_syscall , 0) /* was sys_query_module */
MIPS_SYS(sys_poll , 3)
MIPS_SYS(sys_nfsservctl , 3)
MIPS_SYS(sys_setresgid , 3) /* 4190 */
MIPS_SYS(sys_getresgid , 3)
MIPS_SYS(sys_prctl , 5)
MIPS_SYS(sys_rt_sigreturn, 0)
MIPS_SYS(sys_rt_sigaction, 4)
MIPS_SYS(sys_rt_sigprocmask, 4) /* 4195 */
MIPS_SYS(sys_rt_sigpending, 2)
MIPS_SYS(sys_rt_sigtimedwait, 4)
MIPS_SYS(sys_rt_sigqueueinfo, 3)
MIPS_SYS(sys_rt_sigsuspend, 0)
MIPS_SYS(sys_pread64 , 6) /* 4200 */
MIPS_SYS(sys_pwrite64 , 6)
MIPS_SYS(sys_chown , 3)
MIPS_SYS(sys_getcwd , 2)
MIPS_SYS(sys_capget , 2)
MIPS_SYS(sys_capset , 2) /* 4205 */
MIPS_SYS(sys_sigaltstack , 2)
MIPS_SYS(sys_sendfile , 4)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_mmap2 , 6) /* 4210 */
MIPS_SYS(sys_truncate64 , 4)
MIPS_SYS(sys_ftruncate64 , 4)
MIPS_SYS(sys_stat64 , 2)
MIPS_SYS(sys_lstat64 , 2)
MIPS_SYS(sys_fstat64 , 2) /* 4215 */
MIPS_SYS(sys_pivot_root , 2)
MIPS_SYS(sys_mincore , 3)
MIPS_SYS(sys_madvise , 3)
MIPS_SYS(sys_getdents64 , 3)
MIPS_SYS(sys_fcntl64 , 3) /* 4220 */
MIPS_SYS(sys_ni_syscall , 0)
MIPS_SYS(sys_gettid , 0)
MIPS_SYS(sys_readahead , 5)
MIPS_SYS(sys_setxattr , 5)
MIPS_SYS(sys_lsetxattr , 5) /* 4225 */
MIPS_SYS(sys_fsetxattr , 5)
MIPS_SYS(sys_getxattr , 4)
MIPS_SYS(sys_lgetxattr , 4)
MIPS_SYS(sys_fgetxattr , 4)
MIPS_SYS(sys_listxattr , 3) /* 4230 */
MIPS_SYS(sys_llistxattr , 3)
MIPS_SYS(sys_flistxattr , 3)
MIPS_SYS(sys_removexattr , 2)
MIPS_SYS(sys_lremovexattr, 2)
MIPS_SYS(sys_fremovexattr, 2) /* 4235 */
MIPS_SYS(sys_tkill , 2)
MIPS_SYS(sys_sendfile64 , 5)
MIPS_SYS(sys_futex , 6)
MIPS_SYS(sys_sched_setaffinity, 3)
MIPS_SYS(sys_sched_getaffinity, 3) /* 4240 */
MIPS_SYS(sys_io_setup , 2)
MIPS_SYS(sys_io_destroy , 1)
MIPS_SYS(sys_io_getevents, 5)
MIPS_SYS(sys_io_submit , 3)
MIPS_SYS(sys_io_cancel , 3) /* 4245 */
MIPS_SYS(sys_exit_group , 1)
MIPS_SYS(sys_lookup_dcookie, 3)
MIPS_SYS(sys_epoll_create, 1)
MIPS_SYS(sys_epoll_ctl , 4)
MIPS_SYS(sys_epoll_wait , 3) /* 4250 */
MIPS_SYS(sys_remap_file_pages, 5)
MIPS_SYS(sys_set_tid_address, 1)
MIPS_SYS(sys_restart_syscall, 0)
MIPS_SYS(sys_fadvise64_64, 7)
MIPS_SYS(sys_statfs64 , 3) /* 4255 */
MIPS_SYS(sys_fstatfs64 , 2)
MIPS_SYS(sys_timer_create, 3)
MIPS_SYS(sys_timer_settime, 4)
MIPS_SYS(sys_timer_gettime, 2)
MIPS_SYS(sys_timer_getoverrun, 1) /* 4260 */
MIPS_SYS(sys_timer_delete, 1)
MIPS_SYS(sys_clock_settime, 2)
MIPS_SYS(sys_clock_gettime, 2)
MIPS_SYS(sys_clock_getres, 2)
MIPS_SYS(sys_clock_nanosleep, 4) /* 4265 */
MIPS_SYS(sys_tgkill , 3)
MIPS_SYS(sys_utimes , 2)
MIPS_SYS(sys_mbind , 4)
MIPS_SYS(sys_ni_syscall , 0) /* sys_get_mempolicy */
MIPS_SYS(sys_ni_syscall , 0) /* 4270 sys_set_mempolicy */
MIPS_SYS(sys_mq_open , 4)
MIPS_SYS(sys_mq_unlink , 1)
MIPS_SYS(sys_mq_timedsend, 5)
MIPS_SYS(sys_mq_timedreceive, 5)
MIPS_SYS(sys_mq_notify , 2) /* 4275 */
MIPS_SYS(sys_mq_getsetattr, 3)
MIPS_SYS(sys_ni_syscall , 0) /* sys_vserver */
MIPS_SYS(sys_waitid , 4)
MIPS_SYS(sys_ni_syscall , 0) /* available, was setaltroot */
MIPS_SYS(sys_add_key , 5)
MIPS_SYS(sys_request_key, 4)
MIPS_SYS(sys_keyctl , 5)
MIPS_SYS(sys_set_thread_area, 1)
MIPS_SYS(sys_inotify_init, 0)
MIPS_SYS(sys_inotify_add_watch, 3) /* 4285 */
MIPS_SYS(sys_inotify_rm_watch, 2)
MIPS_SYS(sys_migrate_pages, 4)
MIPS_SYS(sys_openat, 4)
MIPS_SYS(sys_mkdirat, 3)
MIPS_SYS(sys_mknodat, 4) /* 4290 */
MIPS_SYS(sys_fchownat, 5)
MIPS_SYS(sys_futimesat, 3)
MIPS_SYS(sys_fstatat64, 4)
MIPS_SYS(sys_unlinkat, 3)
MIPS_SYS(sys_renameat, 4) /* 4295 */
MIPS_SYS(sys_linkat, 5)
MIPS_SYS(sys_symlinkat, 3)
MIPS_SYS(sys_readlinkat, 4)
MIPS_SYS(sys_fchmodat, 3)
MIPS_SYS(sys_faccessat, 3) /* 4300 */
MIPS_SYS(sys_pselect6, 6)
MIPS_SYS(sys_ppoll, 5)
MIPS_SYS(sys_unshare, 1)
MIPS_SYS(sys_splice, 6)
MIPS_SYS(sys_sync_file_range, 7) /* 4305 */
MIPS_SYS(sys_tee, 4)
MIPS_SYS(sys_vmsplice, 4)
MIPS_SYS(sys_move_pages, 6)
MIPS_SYS(sys_set_robust_list, 2)
MIPS_SYS(sys_get_robust_list, 3) /* 4310 */
MIPS_SYS(sys_kexec_load, 4)
MIPS_SYS(sys_getcpu, 3)
MIPS_SYS(sys_epoll_pwait, 6)
MIPS_SYS(sys_ioprio_set, 3)
MIPS_SYS(sys_ioprio_get, 2)
MIPS_SYS(sys_utimensat, 4)
MIPS_SYS(sys_signalfd, 3)
MIPS_SYS(sys_ni_syscall, 0) /* was timerfd */
MIPS_SYS(sys_eventfd, 1)
MIPS_SYS(sys_fallocate, 6) /* 4320 */
MIPS_SYS(sys_timerfd_create, 2)
MIPS_SYS(sys_timerfd_gettime, 2)
MIPS_SYS(sys_timerfd_settime, 4)
MIPS_SYS(sys_signalfd4, 4)
MIPS_SYS(sys_eventfd2, 2) /* 4325 */
MIPS_SYS(sys_epoll_create1, 1)
MIPS_SYS(sys_dup3, 3)
MIPS_SYS(sys_pipe2, 2)
MIPS_SYS(sys_inotify_init1, 1)
MIPS_SYS(sys_preadv, 5) /* 4330 */
MIPS_SYS(sys_pwritev, 5)
MIPS_SYS(sys_rt_tgsigqueueinfo, 4)
MIPS_SYS(sys_perf_event_open, 5)
MIPS_SYS(sys_accept4, 4)
MIPS_SYS(sys_recvmmsg, 5) /* 4335 */
MIPS_SYS(sys_fanotify_init, 2)
MIPS_SYS(sys_fanotify_mark, 6)
MIPS_SYS(sys_prlimit64, 4)
MIPS_SYS(sys_name_to_handle_at, 5)
MIPS_SYS(sys_open_by_handle_at, 3) /* 4340 */
MIPS_SYS(sys_clock_adjtime, 2)
MIPS_SYS(sys_syncfs, 1)
MIPS_SYS(sys_sendmmsg, 4)
MIPS_SYS(sys_setns, 2)
MIPS_SYS(sys_process_vm_readv, 6) /* 345 */
MIPS_SYS(sys_process_vm_writev, 6)
MIPS_SYS(sys_kcmp, 5)
MIPS_SYS(sys_finit_module, 3)
MIPS_SYS(sys_sched_setattr, 2)
MIPS_SYS(sys_sched_getattr, 3) /* 350 */
MIPS_SYS(sys_renameat2, 5)
MIPS_SYS(sys_seccomp, 3)
MIPS_SYS(sys_getrandom, 3)
MIPS_SYS(sys_memfd_create, 2)
MIPS_SYS(sys_bpf, 3) /* 355 */
MIPS_SYS(sys_execveat, 5)
MIPS_SYS(sys_userfaultfd, 1)
MIPS_SYS(sys_membarrier, 2)
MIPS_SYS(sys_mlock2, 3)
MIPS_SYS(sys_copy_file_range, 6) /* 360 */
MIPS_SYS(sys_preadv2, 6)
MIPS_SYS(sys_pwritev2, 6)
};
# undef MIPS_SYS
# endif /* O32 */
static int do_store_exclusive(CPUMIPSState *env)
{
target_ulong addr;
target_ulong page_addr;
target_ulong val;
int flags;
int segv = 0;
int reg;
int d;
addr = env->lladdr;
page_addr = addr & TARGET_PAGE_MASK;
start_exclusive();
mmap_lock();
flags = page_get_flags(page_addr);
if ((flags & PAGE_READ) == 0) {
segv = 1;
} else {
reg = env->llreg & 0x1f;
d = (env->llreg & 0x20) != 0;
if (d) {
segv = get_user_s64(val, addr);
} else {
segv = get_user_s32(val, addr);
}
if (!segv) {
if (val != env->llval) {
env->active_tc.gpr[reg] = 0;
} else {
if (d) {
segv = put_user_u64(env->llnewval, addr);
} else {
segv = put_user_u32(env->llnewval, addr);
}
if (!segv) {
env->active_tc.gpr[reg] = 1;
}
}
}
}
env->lladdr = -1;
if (!segv) {
env->active_tc.PC += 4;
}
mmap_unlock();
end_exclusive();
return segv;
}
/* Break codes */
enum {
BRK_OVERFLOW = 6,
BRK_DIVZERO = 7
};
static int do_break(CPUMIPSState *env, target_siginfo_t *info,
unsigned int code)
{
int ret = -1;
switch (code) {
case BRK_OVERFLOW:
case BRK_DIVZERO:
info->si_signo = TARGET_SIGFPE;
info->si_errno = 0;
info->si_code = (code == BRK_OVERFLOW) ? FPE_INTOVF : FPE_INTDIV;
queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
ret = 0;
break;
default:
info->si_signo = TARGET_SIGTRAP;
info->si_errno = 0;
queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
ret = 0;
break;
}
return ret;
}
void cpu_loop(CPUMIPSState *env)
{
CPUState *cs = CPU(mips_env_get_cpu(env));
target_siginfo_t info;
int trapnr;
abi_long ret;
# ifdef TARGET_ABI_MIPSO32
unsigned int syscall_num;
# endif
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_SYSCALL:
env->active_tc.PC += 4;
# ifdef TARGET_ABI_MIPSO32
syscall_num = env->active_tc.gpr[2] - 4000;
if (syscall_num >= sizeof(mips_syscall_args)) {
ret = -TARGET_ENOSYS;
} else {
int nb_args;
abi_ulong sp_reg;
abi_ulong arg5 = 0, arg6 = 0, arg7 = 0, arg8 = 0;
nb_args = mips_syscall_args[syscall_num];
sp_reg = env->active_tc.gpr[29];
switch (nb_args) {
/* these arguments are taken from the stack */
case 8:
if ((ret = get_user_ual(arg8, sp_reg + 28)) != 0) {
goto done_syscall;
}
case 7:
if ((ret = get_user_ual(arg7, sp_reg + 24)) != 0) {
goto done_syscall;
}
case 6:
if ((ret = get_user_ual(arg6, sp_reg + 20)) != 0) {
goto done_syscall;
}
case 5:
if ((ret = get_user_ual(arg5, sp_reg + 16)) != 0) {
goto done_syscall;
}
default:
break;
}
ret = do_syscall(env, env->active_tc.gpr[2],
env->active_tc.gpr[4],
env->active_tc.gpr[5],
env->active_tc.gpr[6],
env->active_tc.gpr[7],
arg5, arg6, arg7, arg8);
}
done_syscall:
# else
ret = do_syscall(env, env->active_tc.gpr[2],
env->active_tc.gpr[4], env->active_tc.gpr[5],
env->active_tc.gpr[6], env->active_tc.gpr[7],
env->active_tc.gpr[8], env->active_tc.gpr[9],
env->active_tc.gpr[10], env->active_tc.gpr[11]);
# endif /* O32 */
if (ret == -TARGET_ERESTARTSYS) {
env->active_tc.PC -= 4;
break;
}
if (ret == -TARGET_QEMU_ESIGRETURN) {
/* Returning from a successful sigreturn syscall.
Avoid clobbering register state. */
break;
}
if ((abi_ulong)ret >= (abi_ulong)-1133) {
env->active_tc.gpr[7] = 1; /* error flag */
ret = -ret;
} else {
env->active_tc.gpr[7] = 0; /* error flag */
}
env->active_tc.gpr[2] = ret;
break;
case EXCP_TLBL:
case EXCP_TLBS:
case EXCP_AdEL:
case EXCP_AdES:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->CP0_BadVAddr;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_CpU:
case EXCP_RI:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_SC:
if (do_store_exclusive(env)) {
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->active_tc.PC;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_DSPDIS:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPC;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
/* The code below was inspired by the MIPS Linux kernel trap
* handling code in arch/mips/kernel/traps.c.
*/
case EXCP_BREAK:
{
abi_ulong trap_instr;
unsigned int code;
if (env->hflags & MIPS_HFLAG_M16) {
if (env->insn_flags & ASE_MICROMIPS) {
/* microMIPS mode */
ret = get_user_u16(trap_instr, env->active_tc.PC);
if (ret != 0) {
goto error;
}
if ((trap_instr >> 10) == 0x11) {
/* 16-bit instruction */
code = trap_instr & 0xf;
} else {
/* 32-bit instruction */
abi_ulong instr_lo;
ret = get_user_u16(instr_lo,
env->active_tc.PC + 2);
if (ret != 0) {
goto error;
}
trap_instr = (trap_instr << 16) | instr_lo;
code = ((trap_instr >> 6) & ((1 << 20) - 1));
/* Unfortunately, microMIPS also suffers from
the old assembler bug... */
if (code >= (1 << 10)) {
code >>= 10;
}
}
} else {
/* MIPS16e mode */
ret = get_user_u16(trap_instr, env->active_tc.PC);
if (ret != 0) {
goto error;
}
code = (trap_instr >> 6) & 0x3f;
}
} else {
ret = get_user_u32(trap_instr, env->active_tc.PC);
if (ret != 0) {
goto error;
}
/* As described in the original Linux kernel code, the
* below checks on 'code' are to work around an old
* assembly bug.
*/
code = ((trap_instr >> 6) & ((1 << 20) - 1));
if (code >= (1 << 10)) {
code >>= 10;
}
}
if (do_break(env, &info, code) != 0) {
goto error;
}
}
break;
case EXCP_TRAP:
{
abi_ulong trap_instr;
unsigned int code = 0;
if (env->hflags & MIPS_HFLAG_M16) {
/* microMIPS mode */
abi_ulong instr[2];
ret = get_user_u16(instr[0], env->active_tc.PC) ||
get_user_u16(instr[1], env->active_tc.PC + 2);
trap_instr = (instr[0] << 16) | instr[1];
} else {
ret = get_user_u32(trap_instr, env->active_tc.PC);
}
if (ret != 0) {
goto error;
}
/* The immediate versions don't provide a code. */
if (!(trap_instr & 0xFC000000)) {
if (env->hflags & MIPS_HFLAG_M16) {
/* microMIPS mode */
code = ((trap_instr >> 12) & ((1 << 4) - 1));
} else {
code = ((trap_instr >> 6) & ((1 << 10) - 1));
}
}
if (do_break(env, &info, code) != 0) {
goto error;
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
error:
EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
abort();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
CPUState *cpu = ENV_GET_CPU(env);
TaskState *ts = cpu->opaque;
struct image_info *info = ts->info;
int i;
for(i = 0; i < 32; i++) {
env->active_tc.gpr[i] = regs->regs[i];
}
env->active_tc.PC = regs->cp0_epc & ~(target_ulong)1;
if (regs->cp0_epc & 1) {
env->hflags |= MIPS_HFLAG_M16;
}
if (((info->elf_flags & EF_MIPS_NAN2008) != 0) !=
((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) != 0)) {
if ((env->active_fpu.fcr31_rw_bitmask &
(1 << FCR31_NAN2008)) == 0) {
fprintf(stderr, "ELF binary's NaN mode not supported by CPU\n");
exit(1);
}
if ((info->elf_flags & EF_MIPS_NAN2008) != 0) {
env->active_fpu.fcr31 |= (1 << FCR31_NAN2008);
} else {
env->active_fpu.fcr31 &= ~(1 << FCR31_NAN2008);
}
restore_snan_bit_mode(env);
}
}

400
linux-user/mips/signal.c Normal file
View file

@ -0,0 +1,400 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
# if defined(TARGET_ABI_MIPSO32)
struct target_sigcontext {
uint32_t sc_regmask; /* Unused */
uint32_t sc_status;
uint64_t sc_pc;
uint64_t sc_regs[32];
uint64_t sc_fpregs[32];
uint32_t sc_ownedfp; /* Unused */
uint32_t sc_fpc_csr;
uint32_t sc_fpc_eir; /* Unused */
uint32_t sc_used_math;
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
uint32_t pad0;
uint64_t sc_mdhi;
uint64_t sc_mdlo;
target_ulong sc_hi1; /* Was sc_cause */
target_ulong sc_lo1; /* Was sc_badvaddr */
target_ulong sc_hi2; /* Was sc_sigset[4] */
target_ulong sc_lo2;
target_ulong sc_hi3;
target_ulong sc_lo3;
};
# else /* N32 || N64 */
struct target_sigcontext {
uint64_t sc_regs[32];
uint64_t sc_fpregs[32];
uint64_t sc_mdhi;
uint64_t sc_hi1;
uint64_t sc_hi2;
uint64_t sc_hi3;
uint64_t sc_mdlo;
uint64_t sc_lo1;
uint64_t sc_lo2;
uint64_t sc_lo3;
uint64_t sc_pc;
uint32_t sc_fpc_csr;
uint32_t sc_used_math;
uint32_t sc_dsp;
uint32_t sc_reserved;
};
# endif /* O32 */
struct sigframe {
uint32_t sf_ass[4]; /* argument save space for o32 */
uint32_t sf_code[2]; /* signal trampoline */
struct target_sigcontext sf_sc;
target_sigset_t sf_mask;
};
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link;
target_stack_t tuc_stack;
target_ulong pad0;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask;
};
struct target_rt_sigframe {
uint32_t rs_ass[4]; /* argument save space for o32 */
uint32_t rs_code[2]; /* signal trampoline */
struct target_siginfo rs_info;
struct target_ucontext rs_uc;
};
/* Install trampoline to jump back from signal handler */
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
{
int err = 0;
/*
* Set up the return code ...
*
* li v0, __NR__foo_sigreturn
* syscall
*/
__put_user(0x24020000 + syscall, tramp + 0);
__put_user(0x0000000c , tramp + 1);
return err;
}
static inline void setup_sigcontext(CPUMIPSState *regs,
struct target_sigcontext *sc)
{
int i;
__put_user(exception_resume_pc(regs), &sc->sc_pc);
regs->hflags &= ~MIPS_HFLAG_BMASK;
__put_user(0, &sc->sc_regs[0]);
for (i = 1; i < 32; ++i) {
__put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
}
__put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
__put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
/* Rather than checking for dsp existence, always copy. The storage
would just be garbage otherwise. */
__put_user(regs->active_tc.HI[1], &sc->sc_hi1);
__put_user(regs->active_tc.HI[2], &sc->sc_hi2);
__put_user(regs->active_tc.HI[3], &sc->sc_hi3);
__put_user(regs->active_tc.LO[1], &sc->sc_lo1);
__put_user(regs->active_tc.LO[2], &sc->sc_lo2);
__put_user(regs->active_tc.LO[3], &sc->sc_lo3);
{
uint32_t dsp = cpu_rddsp(0x3ff, regs);
__put_user(dsp, &sc->sc_dsp);
}
__put_user(1, &sc->sc_used_math);
for (i = 0; i < 32; ++i) {
__put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
}
}
static inline void
restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
{
int i;
__get_user(regs->CP0_EPC, &sc->sc_pc);
__get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
__get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
for (i = 1; i < 32; ++i) {
__get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
}
__get_user(regs->active_tc.HI[1], &sc->sc_hi1);
__get_user(regs->active_tc.HI[2], &sc->sc_hi2);
__get_user(regs->active_tc.HI[3], &sc->sc_hi3);
__get_user(regs->active_tc.LO[1], &sc->sc_lo1);
__get_user(regs->active_tc.LO[2], &sc->sc_lo2);
__get_user(regs->active_tc.LO[3], &sc->sc_lo3);
{
uint32_t dsp;
__get_user(dsp, &sc->sc_dsp);
cpu_wrdsp(dsp, 0x3ff, regs);
}
for (i = 0; i < 32; ++i) {
__get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
}
}
/*
* Determine which stack to use..
*/
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
{
unsigned long sp;
/* Default to using normal stack */
sp = regs->active_tc.gpr[29];
/*
* FPU emulator may have its own trampoline active just
* above the user stack, 16-bytes before the next lowest
* 16 byte boundary. Try to avoid trashing it.
*/
sp -= 32;
/* This is the X/Open sanctioned signal stack switching. */
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return (sp - frame_size) & ~7;
}
static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
{
if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
env->hflags &= ~MIPS_HFLAG_M16;
env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
env->active_tc.PC &= ~(target_ulong) 1;
}
}
# if defined(TARGET_ABI_MIPSO32)
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
void setup_frame(int sig, struct target_sigaction * ka,
target_sigset_t *set, CPUMIPSState *regs)
{
struct sigframe *frame;
abi_ulong frame_addr;
int i;
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
trace_user_setup_frame(regs, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
setup_sigcontext(regs, &frame->sf_sc);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->sf_mask.sig[i]);
}
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = 0 (should be cause)
* a2 = pointer to struct sigcontext
*
* $25 and PC point to the signal handler, $29 points to the
* struct sigframe.
*/
regs->active_tc.gpr[ 4] = sig;
regs->active_tc.gpr[ 5] = 0;
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
regs->active_tc.gpr[29] = frame_addr;
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
/* The original kernel code sets CP0_EPC to the handler
* since it returns to userland using eret
* we cannot do this here, and we must set PC directly */
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
mips_set_hflags_isa_mode_from_pc(regs);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
long do_sigreturn(CPUMIPSState *regs)
{
struct sigframe *frame;
abi_ulong frame_addr;
sigset_t blocked;
target_sigset_t target_set;
int i;
frame_addr = regs->active_tc.gpr[29];
trace_user_do_sigreturn(regs, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->sf_mask.sig[i]);
}
target_to_host_sigset_internal(&blocked, &target_set);
set_sigmask(&blocked);
restore_sigcontext(regs, &frame->sf_sc);
#if 0
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
#endif
regs->active_tc.PC = regs->CP0_EPC;
mips_set_hflags_isa_mode_from_pc(regs);
/* I am not sure this is right, but it seems to work
* maybe a problem with nested signals ? */
regs->CP0_EPC = 0;
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
# endif /* O32 */
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUMIPSState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
int i;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
tswap_siginfo(&frame->rs_info, info);
__put_user(0, &frame->rs_uc.tuc_flags);
__put_user(0, &frame->rs_uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->rs_uc.tuc_stack.ss_flags);
setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
}
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = pointer to siginfo_t
* a2 = pointer to ucontext_t
*
* $25 and PC point to the signal handler, $29 points to the
* struct sigframe.
*/
env->active_tc.gpr[ 4] = sig;
env->active_tc.gpr[ 5] = frame_addr
+ offsetof(struct target_rt_sigframe, rs_info);
env->active_tc.gpr[ 6] = frame_addr
+ offsetof(struct target_rt_sigframe, rs_uc);
env->active_tc.gpr[29] = frame_addr;
env->active_tc.gpr[31] = frame_addr
+ offsetof(struct target_rt_sigframe, rs_code);
/* The original kernel code sets CP0_EPC to the handler
* since it returns to userland using eret
* we cannot do this here, and we must set PC directly */
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
mips_set_hflags_isa_mode_from_pc(env);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
long do_rt_sigreturn(CPUMIPSState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
sigset_t blocked;
frame_addr = env->active_tc.gpr[29];
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
set_sigmask(&blocked);
restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
env->active_tc.PC = env->CP0_EPC;
mips_set_hflags_isa_mode_from_pc(env);
/* I am not sure this is right, but it seems to work
* maybe a problem with nested signals ? */
env->CP0_EPC = 0;
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

5
linux-user/mips/target_signal.h
View file

@ -26,5 +26,8 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
return state->active_tc.gpr[29];
}
#if defined(TARGET_ABI_MIPSO32)
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif
#endif /* MIPS_TARGET_SIGNAL_H */

20
linux-user/mips64/cpu_loop.c Normal file
View file

@ -0,0 +1,20 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "../mips/cpu_loop.c"

20
linux-user/mips64/signal.c Normal file
View file

@ -0,0 +1,20 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define MIPS_TARGET_SIGNAL_H /* to only include mips64/target_signal.h */
#include "../mips/signal.c"

2
linux-user/mips64/target_signal.h
View file

@ -25,6 +25,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
{
return state->active_tc.gpr[29];
}
#endif /* MIPS64_TARGET_SIGNAL_H */

152
linux-user/nios2/cpu_loop.c Normal file
View file

@ -0,0 +1,152 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUNios2State *env)
{
CPUState *cs = ENV_GET_CPU(env);
Nios2CPU *cpu = NIOS2_CPU(cs);
target_siginfo_t info;
int trapnr, gdbsig, ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
gdbsig = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_TRAP:
if (env->regs[R_AT] == 0) {
abi_long ret;
qemu_log_mask(CPU_LOG_INT, "\nSyscall\n");
ret = do_syscall(env, env->regs[2],
env->regs[4], env->regs[5], env->regs[6],
env->regs[7], env->regs[8], env->regs[9],
0, 0);
if (env->regs[2] == 0) { /* FIXME: syscall 0 workaround */
ret = 0;
}
env->regs[2] = abs(ret);
/* Return value is 0..4096 */
env->regs[7] = (ret > 0xfffffffffffff000ULL);
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] &= ~0x3;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] += 4;
break;
} else {
qemu_log_mask(CPU_LOG_INT, "\nTrap\n");
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] &= ~0x3;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] = cpu->exception_addr;
gdbsig = TARGET_SIGTRAP;
break;
}
case 0xaa:
switch (env->regs[R_PC]) {
/*case 0x1000:*/ /* TODO:__kuser_helper_version */
case 0x1004: /* __kuser_cmpxchg */
start_exclusive();
if (env->regs[4] & 0x3) {
goto kuser_fail;
}
ret = get_user_u32(env->regs[2], env->regs[4]);
if (ret) {
end_exclusive();
goto kuser_fail;
}
env->regs[2] -= env->regs[5];
if (env->regs[2] == 0) {
put_user_u32(env->regs[6], env->regs[4]);
}
end_exclusive();
env->regs[R_PC] = env->regs[R_RA];
break;
/*case 0x1040:*/ /* TODO:__kuser_sigtramp */
default:
;
kuser_fail:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* TODO: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->regs[R_PC];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
gdbsig = TARGET_SIGILL;
break;
}
if (gdbsig) {
gdb_handlesig(cs, gdbsig);
if (gdbsig != TARGET_SIGTRAP) {
exit(EXIT_FAILURE);
}
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->regs[0] = 0;
env->regs[1] = regs->r1;
env->regs[2] = regs->r2;
env->regs[3] = regs->r3;
env->regs[4] = regs->r4;
env->regs[5] = regs->r5;
env->regs[6] = regs->r6;
env->regs[7] = regs->r7;
env->regs[8] = regs->r8;
env->regs[9] = regs->r9;
env->regs[10] = regs->r10;
env->regs[11] = regs->r11;
env->regs[12] = regs->r12;
env->regs[13] = regs->r13;
env->regs[14] = regs->r14;
env->regs[15] = regs->r15;
/* TODO: unsigned long orig_r2; */
env->regs[R_RA] = regs->ra;
env->regs[R_FP] = regs->fp;
env->regs[R_SP] = regs->sp;
env->regs[R_GP] = regs->gp;
env->regs[CR_ESTATUS] = regs->estatus;
env->regs[R_EA] = regs->ea;
/* TODO: unsigned long orig_r7; */
/* Emulate eret when starting thread. */
env->regs[R_PC] = regs->ea;
}

254
linux-user/nios2/signal.c Normal file
View file

@ -0,0 +1,254 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
#define MCONTEXT_VERSION 2
struct target_sigcontext {
int version;
unsigned long gregs[32];
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_rt_sigframe {
struct target_siginfo info;
struct target_ucontext uc;
};
static unsigned long sigsp(unsigned long sp, struct target_sigaction *ka)
{
if (unlikely((ka->sa_flags & SA_ONSTACK)) && !sas_ss_flags(sp)) {
#ifdef CONFIG_STACK_GROWSUP
return target_sigaltstack_used.ss_sp;
#else
return target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
#endif
}
return sp;
}
static int rt_setup_ucontext(struct target_ucontext *uc, CPUNios2State *env)
{
unsigned long *gregs = uc->tuc_mcontext.gregs;
__put_user(MCONTEXT_VERSION, &uc->tuc_mcontext.version);
__put_user(env->regs[1], &gregs[0]);
__put_user(env->regs[2], &gregs[1]);
__put_user(env->regs[3], &gregs[2]);
__put_user(env->regs[4], &gregs[3]);
__put_user(env->regs[5], &gregs[4]);
__put_user(env->regs[6], &gregs[5]);
__put_user(env->regs[7], &gregs[6]);
__put_user(env->regs[8], &gregs[7]);
__put_user(env->regs[9], &gregs[8]);
__put_user(env->regs[10], &gregs[9]);
__put_user(env->regs[11], &gregs[10]);
__put_user(env->regs[12], &gregs[11]);
__put_user(env->regs[13], &gregs[12]);
__put_user(env->regs[14], &gregs[13]);
__put_user(env->regs[15], &gregs[14]);
__put_user(env->regs[16], &gregs[15]);
__put_user(env->regs[17], &gregs[16]);
__put_user(env->regs[18], &gregs[17]);
__put_user(env->regs[19], &gregs[18]);
__put_user(env->regs[20], &gregs[19]);
__put_user(env->regs[21], &gregs[20]);
__put_user(env->regs[22], &gregs[21]);
__put_user(env->regs[23], &gregs[22]);
__put_user(env->regs[R_RA], &gregs[23]);
__put_user(env->regs[R_FP], &gregs[24]);
__put_user(env->regs[R_GP], &gregs[25]);
__put_user(env->regs[R_EA], &gregs[27]);
__put_user(env->regs[R_SP], &gregs[28]);
return 0;
}
static int rt_restore_ucontext(CPUNios2State *env, struct target_ucontext *uc,
int *pr2)
{
int temp;
abi_ulong off, frame_addr = env->regs[R_SP];
unsigned long *gregs = uc->tuc_mcontext.gregs;
int err;
/* Always make any pending restarted system calls return -EINTR */
/* current->restart_block.fn = do_no_restart_syscall; */
__get_user(temp, &uc->tuc_mcontext.version);
if (temp != MCONTEXT_VERSION) {
return 1;
}
/* restore passed registers */
__get_user(env->regs[1], &gregs[0]);
__get_user(env->regs[2], &gregs[1]);
__get_user(env->regs[3], &gregs[2]);
__get_user(env->regs[4], &gregs[3]);
__get_user(env->regs[5], &gregs[4]);
__get_user(env->regs[6], &gregs[5]);
__get_user(env->regs[7], &gregs[6]);
__get_user(env->regs[8], &gregs[7]);
__get_user(env->regs[9], &gregs[8]);
__get_user(env->regs[10], &gregs[9]);
__get_user(env->regs[11], &gregs[10]);
__get_user(env->regs[12], &gregs[11]);
__get_user(env->regs[13], &gregs[12]);
__get_user(env->regs[14], &gregs[13]);
__get_user(env->regs[15], &gregs[14]);
__get_user(env->regs[16], &gregs[15]);
__get_user(env->regs[17], &gregs[16]);
__get_user(env->regs[18], &gregs[17]);
__get_user(env->regs[19], &gregs[18]);
__get_user(env->regs[20], &gregs[19]);
__get_user(env->regs[21], &gregs[20]);
__get_user(env->regs[22], &gregs[21]);
__get_user(env->regs[23], &gregs[22]);
/* gregs[23] is handled below */
/* Verify, should this be settable */
__get_user(env->regs[R_FP], &gregs[24]);
/* Verify, should this be settable */
__get_user(env->regs[R_GP], &gregs[25]);
/* Not really necessary no user settable bits */
__get_user(temp, &gregs[26]);
__get_user(env->regs[R_EA], &gregs[27]);
__get_user(env->regs[R_RA], &gregs[23]);
__get_user(env->regs[R_SP], &gregs[28]);
off = offsetof(struct target_rt_sigframe, uc.tuc_stack);
err = do_sigaltstack(frame_addr + off, 0, get_sp_from_cpustate(env));
if (err == -EFAULT) {
return 1;
}
*pr2 = env->regs[2];
return 0;
}
static void *get_sigframe(struct target_sigaction *ka, CPUNios2State *env,
size_t frame_size)
{
unsigned long usp;
/* Default to using normal stack. */
usp = env->regs[R_SP];
/* This is the X/Open sanctioned signal stack switching. */
usp = sigsp(usp, ka);
/* Verify, is it 32 or 64 bit aligned */
return (void *)((usp - frame_size) & -8UL);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set,
CPUNios2State *env)
{
struct target_rt_sigframe *frame;
int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
if (ka->sa_flags & SA_SIGINFO) {
tswap_siginfo(&frame->info, info);
}
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->regs[R_SP]), &frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
err |= rt_setup_ucontext(&frame->uc, env);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user((abi_ulong)set->sig[i],
(abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
}
if (err) {
goto give_sigsegv;
}
/* Set up to return from userspace; jump to fixed address sigreturn
trampoline on kuser page. */
env->regs[R_RA] = (unsigned long) (0x1044);
/* Set up registers for signal handler */
env->regs[R_SP] = (unsigned long) frame;
env->regs[4] = (unsigned long) sig;
env->regs[5] = (unsigned long) &frame->info;
env->regs[6] = (unsigned long) &frame->uc;
env->regs[R_EA] = (unsigned long) ka->_sa_handler;
return;
give_sigsegv:
if (sig == TARGET_SIGSEGV) {
ka->_sa_handler = TARGET_SIG_DFL;
}
force_sigsegv(sig);
return;
}
long do_sigreturn(CPUNios2State *env)
{
trace_user_do_sigreturn(env, 0);
fprintf(stderr, "do_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUNios2State *env)
{
/* Verify, can we follow the stack back */
abi_ulong frame_addr = env->regs[R_SP];
struct target_rt_sigframe *frame;
sigset_t set;
int rval;
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
do_sigprocmask(SIG_SETMASK, &set, NULL);
if (rt_restore_ucontext(env, &frame->uc, &rval)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return rval;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return 0;
}

1
linux-user/nios2/target_signal.h
View file

@ -22,5 +22,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUNios2State *state)
{
return state->regs[R_SP];
}
#endif /* TARGET_SIGNAL_H */

115
linux-user/openrisc/cpu_loop.c Normal file
View file

@ -0,0 +1,115 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUOpenRISCState *env)
{
CPUState *cs = CPU(openrisc_env_get_cpu(env));
int trapnr;
abi_long ret;
target_siginfo_t info;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SYSCALL:
env->pc += 4; /* 0xc00; */
ret = do_syscall(env,
cpu_get_gpr(env, 11), /* return value */
cpu_get_gpr(env, 3), /* r3 - r7 are params */
cpu_get_gpr(env, 4),
cpu_get_gpr(env, 5),
cpu_get_gpr(env, 6),
cpu_get_gpr(env, 7),
cpu_get_gpr(env, 8), 0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
cpu_set_gpr(env, 11, ret);
}
break;
case EXCP_DPF:
case EXCP_IPF:
case EXCP_RANGE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ALIGN:
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_ADRALN;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ILLEGAL:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPC;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_FPE:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_INTERRUPT:
/* We processed the pending cpu work above. */
break;
case EXCP_DEBUG:
trapnr = gdb_handlesig(cs, TARGET_SIGTRAP);
if (trapnr) {
info.si_signo = trapnr;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < 32; i++) {
cpu_set_gpr(env, i, regs->gpr[i]);
}
env->pc = regs->pc;
cpu_set_sr(env, regs->sr);
}

231
linux-user/openrisc/signal.c Normal file
View file

@ -0,0 +1,231 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
struct target_pt_regs regs;
abi_ulong oldmask;
abi_ulong usp;
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_rt_sigframe {
abi_ulong pinfo;
uint64_t puc;
struct target_siginfo info;
struct target_sigcontext sc;
struct target_ucontext uc;
unsigned char retcode[16]; /* trampoline code */
};
/* This is the asm-generic/ucontext.h version */
#if 0
static int restore_sigcontext(CPUOpenRISCState *regs,
struct target_sigcontext *sc)
{
unsigned int err = 0;
unsigned long old_usp;
/* Alwys make any pending restarted system call return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
/* restore the regs from &sc->regs (same as sc, since regs is first)
* (sc is already checked for VERIFY_READ since the sigframe was
* checked in sys_sigreturn previously)
*/
if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
goto badframe;
}
/* make sure the U-flag is set so user-mode cannot fool us */
regs->sr &= ~SR_SM;
/* restore the old USP as it was before we stacked the sc etc.
* (we cannot just pop the sigcontext since we aligned the sp and
* stuff after pushing it)
*/
__get_user(old_usp, &sc->usp);
phx_signal("old_usp 0x%lx", old_usp);
__PHX__ REALLY /* ??? */
wrusp(old_usp);
regs->gpr[1] = old_usp;
/* TODO: the other ports use regs->orig_XX to disable syscall checks
* after this completes, but we don't use that mechanism. maybe we can
* use it now ?
*/
return err;
badframe:
return 1;
}
#endif
/* Set up a signal frame. */
static void setup_sigcontext(struct target_sigcontext *sc,
CPUOpenRISCState *regs,
unsigned long mask)
{
unsigned long usp = cpu_get_gpr(regs, 1);
/* copy the regs. they are first in sc so we can use sc directly */
/*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
/* Set the frametype to CRIS_FRAME_NORMAL for the execution of
the signal handler. The frametype will be restored to its previous
value in restore_sigcontext. */
/*regs->frametype = CRIS_FRAME_NORMAL;*/
/* then some other stuff */
__put_user(mask, &sc->oldmask);
__put_user(usp, &sc->usp);
}
static inline unsigned long align_sigframe(unsigned long sp)
{
return sp & ~3UL;
}
static inline abi_ulong get_sigframe(struct target_sigaction *ka,
CPUOpenRISCState *regs,
size_t frame_size)
{
unsigned long sp = cpu_get_gpr(regs, 1);
int onsigstack = on_sig_stack(sp);
/* redzone */
/* This is the X/Open sanctioned signal stack switching. */
if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp = align_sigframe(sp - frame_size);
/*
* If we are on the alternate signal stack and would overflow it, don't.
* Return an always-bogus address instead so we will die with SIGSEGV.
*/
if (onsigstack && !likely(on_sig_stack(sp))) {
return -1L;
}
return sp;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUOpenRISCState *env)
{
int err = 0;
abi_ulong frame_addr;
unsigned long return_ip;
struct target_rt_sigframe *frame;
abi_ulong info_addr, uc_addr;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
__put_user(info_addr, &frame->pinfo);
uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
__put_user(uc_addr, &frame->puc);
if (ka->sa_flags & SA_SIGINFO) {
tswap_siginfo(&frame->info, info);
}
/*err |= __clear_user(&frame->uc, offsetof(ucontext_t, uc_mcontext));*/
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(cpu_get_gpr(env, 1)),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
setup_sigcontext(&frame->sc, env, set->sig[0]);
/*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
/* trampoline - the desired return ip is the retcode itself */
return_ip = (unsigned long)&frame->retcode;
/* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
__put_user(0xa960, (short *)(frame->retcode + 0));
__put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
__put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
__put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
if (err) {
goto give_sigsegv;
}
/* TODO what is the current->exec_domain stuff and invmap ? */
/* Set up registers for signal handler */
env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
cpu_set_gpr(env, 9, (unsigned long)return_ip); /* what we enter LATER */
cpu_set_gpr(env, 3, (unsigned long)sig); /* arg 1: signo */
cpu_set_gpr(env, 4, (unsigned long)&frame->info); /* arg 2: (siginfo_t*) */
cpu_set_gpr(env, 5, (unsigned long)&frame->uc); /* arg 3: ucontext */
/* actually move the usp to reflect the stacked frame */
cpu_set_gpr(env, 1, (unsigned long)frame);
return;
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
long do_sigreturn(CPUOpenRISCState *env)
{
trace_user_do_sigreturn(env, 0);
fprintf(stderr, "do_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUOpenRISCState *env)
{
trace_user_do_rt_sigreturn(env, 0);
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}

2
linux-user/openrisc/target_signal.h
View file

@ -22,6 +22,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUOpenRISCState *state)
{
return cpu_get_gpr(state, 1);
}
#endif /* OPENRISC_TARGET_SIGNAL_H */

579
linux-user/ppc/cpu_loop.c Normal file
View file

@ -0,0 +1,579 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env)
{
return cpu_get_host_ticks();
}
uint64_t cpu_ppc_load_tbl(CPUPPCState *env)
{
return cpu_ppc_get_tb(env);
}
uint32_t cpu_ppc_load_tbu(CPUPPCState *env)
{
return cpu_ppc_get_tb(env) >> 32;
}
uint64_t cpu_ppc_load_atbl(CPUPPCState *env)
{
return cpu_ppc_get_tb(env);
}
uint32_t cpu_ppc_load_atbu(CPUPPCState *env)
{
return cpu_ppc_get_tb(env) >> 32;
}
uint32_t cpu_ppc601_load_rtcu(CPUPPCState *env)
__attribute__ (( alias ("cpu_ppc_load_tbu") ));
uint32_t cpu_ppc601_load_rtcl(CPUPPCState *env)
{
return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
}
/* XXX: to be fixed */
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
{
return -1;
}
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
{
return -1;
}
static int do_store_exclusive(CPUPPCState *env)
{
target_ulong addr;
target_ulong page_addr;
target_ulong val, val2 __attribute__((unused)) = 0;
int flags;
int segv = 0;
addr = env->reserve_ea;
page_addr = addr & TARGET_PAGE_MASK;
start_exclusive();
mmap_lock();
flags = page_get_flags(page_addr);
if ((flags & PAGE_READ) == 0) {
segv = 1;
} else {
int reg = env->reserve_info & 0x1f;
int size = env->reserve_info >> 5;
int stored = 0;
if (addr == env->reserve_addr) {
switch (size) {
case 1: segv = get_user_u8(val, addr); break;
case 2: segv = get_user_u16(val, addr); break;
case 4: segv = get_user_u32(val, addr); break;
#if defined(TARGET_PPC64)
case 8: segv = get_user_u64(val, addr); break;
case 16: {
segv = get_user_u64(val, addr);
if (!segv) {
segv = get_user_u64(val2, addr + 8);
}
break;
}
#endif
default: abort();
}
if (!segv && val == env->reserve_val) {
val = env->gpr[reg];
switch (size) {
case 1: segv = put_user_u8(val, addr); break;
case 2: segv = put_user_u16(val, addr); break;
case 4: segv = put_user_u32(val, addr); break;
#if defined(TARGET_PPC64)
case 8: segv = put_user_u64(val, addr); break;
case 16: {
if (val2 == env->reserve_val2) {
if (msr_le) {
val2 = val;
val = env->gpr[reg+1];
} else {
val2 = env->gpr[reg+1];
}
segv = put_user_u64(val, addr);
if (!segv) {
segv = put_user_u64(val2, addr + 8);
}
}
break;
}
#endif
default: abort();
}
if (!segv) {
stored = 1;
}
}
}
env->crf[0] = (stored << 1) | xer_so;
env->reserve_addr = (target_ulong)-1;
}
if (!segv) {
env->nip += 4;
}
mmap_unlock();
end_exclusive();
return segv;
}
void cpu_loop(CPUPPCState *env)
{
CPUState *cs = CPU(ppc_env_get_cpu(env));
target_siginfo_t info;
int trapnr;
target_ulong ret;
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case POWERPC_EXCP_NONE:
/* Just go on */
break;
case POWERPC_EXCP_CRITICAL: /* Critical input */
cpu_abort(cs, "Critical interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_MCHECK: /* Machine check exception */
cpu_abort(cs, "Machine check exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_DSI: /* Data storage exception */
/* XXX: check this. Seems bugged */
switch (env->error_code & 0xFF000000) {
case 0x40000000:
case 0x42000000:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
case 0x04000000:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLADR;
break;
case 0x08000000:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
break;
default:
/* Let's send a regular segfault... */
EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
env->error_code);
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
}
info._sifields._sigfault._addr = env->spr[SPR_DAR];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_ISI: /* Instruction storage exception */
/* XXX: check this */
switch (env->error_code & 0xFF000000) {
case 0x40000000:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
case 0x10000000:
case 0x08000000:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
break;
default:
/* Let's send a regular segfault... */
EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
env->error_code);
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
}
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_EXTERNAL: /* External input */
cpu_abort(cs, "External interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_ALIGN: /* Alignment exception */
/* XXX: check this */
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_ADRALN;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_PROGRAM: /* Program exception */
case POWERPC_EXCP_HV_EMU: /* HV emulation */
/* XXX: check this */
switch (env->error_code & ~0xF) {
case POWERPC_EXCP_FP:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case POWERPC_EXCP_FP_OX:
info.si_code = TARGET_FPE_FLTOVF;
break;
case POWERPC_EXCP_FP_UX:
info.si_code = TARGET_FPE_FLTUND;
break;
case POWERPC_EXCP_FP_ZX:
case POWERPC_EXCP_FP_VXZDZ:
info.si_code = TARGET_FPE_FLTDIV;
break;
case POWERPC_EXCP_FP_XX:
info.si_code = TARGET_FPE_FLTRES;
break;
case POWERPC_EXCP_FP_VXSOFT:
info.si_code = TARGET_FPE_FLTINV;
break;
case POWERPC_EXCP_FP_VXSNAN:
case POWERPC_EXCP_FP_VXISI:
case POWERPC_EXCP_FP_VXIDI:
case POWERPC_EXCP_FP_VXIMZ:
case POWERPC_EXCP_FP_VXVC:
case POWERPC_EXCP_FP_VXSQRT:
case POWERPC_EXCP_FP_VXCVI:
info.si_code = TARGET_FPE_FLTSUB;
break;
default:
EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
env->error_code);
break;
}
break;
case POWERPC_EXCP_INVAL:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case POWERPC_EXCP_INVAL_INVAL:
info.si_code = TARGET_ILL_ILLOPC;
break;
case POWERPC_EXCP_INVAL_LSWX:
info.si_code = TARGET_ILL_ILLOPN;
break;
case POWERPC_EXCP_INVAL_SPR:
info.si_code = TARGET_ILL_PRVREG;
break;
case POWERPC_EXCP_INVAL_FP:
info.si_code = TARGET_ILL_COPROC;
break;
default:
EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
env->error_code & 0xF);
info.si_code = TARGET_ILL_ILLADR;
break;
}
break;
case POWERPC_EXCP_PRIV:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case POWERPC_EXCP_PRIV_OPC:
info.si_code = TARGET_ILL_PRVOPC;
break;
case POWERPC_EXCP_PRIV_REG:
info.si_code = TARGET_ILL_PRVREG;
break;
default:
EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
env->error_code & 0xF);
info.si_code = TARGET_ILL_PRVOPC;
break;
}
break;
case POWERPC_EXCP_TRAP:
cpu_abort(cs, "Tried to call a TRAP\n");
break;
default:
/* Should not happen ! */
cpu_abort(cs, "Unknown program exception (%02x)\n",
env->error_code);
break;
}
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_COPROC;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_SYSCALL: /* System call exception */
cpu_abort(cs, "Syscall exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_COPROC;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_DECR: /* Decrementer exception */
cpu_abort(cs, "Decrementer interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
cpu_abort(cs, "Fix interval timer interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
cpu_abort(cs, "Watchdog timer interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_DTLB: /* Data TLB error */
cpu_abort(cs, "Data TLB exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_ITLB: /* Instruction TLB error */
cpu_abort(cs, "Instruction TLB exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_COPROC;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
cpu_abort(cs, "Embedded floating-point data IRQ not handled\n");
break;
case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
cpu_abort(cs, "Embedded floating-point round IRQ not handled\n");
break;
case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
cpu_abort(cs, "Performance monitor exception not handled\n");
break;
case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
cpu_abort(cs, "Doorbell interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
cpu_abort(cs, "Doorbell critical interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_RESET: /* System reset exception */
cpu_abort(cs, "Reset interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_DSEG: /* Data segment exception */
cpu_abort(cs, "Data segment exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_ISEG: /* Instruction segment exception */
cpu_abort(cs, "Instruction segment exception "
"while in user mode. Aborting\n");
break;
/* PowerPC 64 with hypervisor mode support */
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
cpu_abort(cs, "Hypervisor decrementer interrupt "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_TRACE: /* Trace exception */
/* Nothing to do:
* we use this exception to emulate step-by-step execution mode.
*/
break;
/* PowerPC 64 with hypervisor mode support */
case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
cpu_abort(cs, "Hypervisor data storage exception "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
cpu_abort(cs, "Hypervisor instruction storage exception "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
cpu_abort(cs, "Hypervisor data segment exception "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
cpu_abort(cs, "Hypervisor instruction segment exception "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_VPU: /* Vector unavailable exception */
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_COPROC;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
cpu_abort(cs, "Programmable interval timer interrupt "
"while in user mode. Aborting\n");
break;
case POWERPC_EXCP_IO: /* IO error exception */
cpu_abort(cs, "IO error exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_RUNM: /* Run mode exception */
cpu_abort(cs, "Run mode exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_EMUL: /* Emulation trap exception */
cpu_abort(cs, "Emulation trap exception not handled\n");
break;
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
cpu_abort(cs, "Instruction fetch TLB exception "
"while in user-mode. Aborting");
break;
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
cpu_abort(cs, "Data load TLB exception while in user-mode. "
"Aborting");
break;
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
cpu_abort(cs, "Data store TLB exception while in user-mode. "
"Aborting");
break;
case POWERPC_EXCP_FPA: /* Floating-point assist exception */
cpu_abort(cs, "Floating-point assist exception not handled\n");
break;
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
cpu_abort(cs, "Instruction address breakpoint exception "
"not handled\n");
break;
case POWERPC_EXCP_SMI: /* System management interrupt */
cpu_abort(cs, "System management interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_THERM: /* Thermal interrupt */
cpu_abort(cs, "Thermal interrupt interrupt while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
cpu_abort(cs, "Performance monitor exception not handled\n");
break;
case POWERPC_EXCP_VPUA: /* Vector assist exception */
cpu_abort(cs, "Vector assist exception not handled\n");
break;
case POWERPC_EXCP_SOFTP: /* Soft patch exception */
cpu_abort(cs, "Soft patch exception not handled\n");
break;
case POWERPC_EXCP_MAINT: /* Maintenance exception */
cpu_abort(cs, "Maintenance exception while in user mode. "
"Aborting\n");
break;
case POWERPC_EXCP_STOP: /* stop translation */
/* We did invalidate the instruction cache. Go on */
break;
case POWERPC_EXCP_BRANCH: /* branch instruction: */
/* We just stopped because of a branch. Go on */
break;
case POWERPC_EXCP_SYSCALL_USER:
/* system call in user-mode emulation */
/* WARNING:
* PPC ABI uses overflow flag in cr0 to signal an error
* in syscalls.
*/
env->crf[0] &= ~0x1;
env->nip += 4;
ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
env->gpr[5], env->gpr[6], env->gpr[7],
env->gpr[8], 0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->nip -= 4;
break;
}
if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) {
/* Returning from a successful sigreturn syscall.
Avoid corrupting register state. */
break;
}
if (ret > (target_ulong)(-515)) {
env->crf[0] |= 0x1;
ret = -ret;
}
env->gpr[3] = ret;
break;
case POWERPC_EXCP_STCX:
if (do_store_exclusive(env)) {
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->nip;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig) {
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
cpu_abort(cs, "Unknown exception 0x%x. Aborting\n", trapnr);
break;
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
#if defined(TARGET_PPC64)
int flag = (env->insns_flags2 & PPC2_BOOKE206) ? MSR_CM : MSR_SF;
#if defined(TARGET_ABI32)
env->msr &= ~((target_ulong)1 << flag);
#else
env->msr |= (target_ulong)1 << flag;
#endif
#endif
env->nip = regs->nip;
for(i = 0; i < 32; i++) {
env->gpr[i] = regs->gpr[i];
}
}

689
linux-user/ppc/signal.c Normal file
View file

@ -0,0 +1,689 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
/* Size of dummy stack frame allocated when calling signal handler.
See arch/powerpc/include/asm/ptrace.h. */
#if defined(TARGET_PPC64)
#define SIGNAL_FRAMESIZE 128
#else
#define SIGNAL_FRAMESIZE 64
#endif
/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
on 64-bit PPC, sigcontext and mcontext are one and the same. */
struct target_mcontext {
target_ulong mc_gregs[48];
/* Includes fpscr. */
uint64_t mc_fregs[33];
#if defined(TARGET_PPC64)
/* Pointer to the vector regs */
target_ulong v_regs;
#else
target_ulong mc_pad[2];
#endif
/* We need to handle Altivec and SPE at the same time, which no
kernel needs to do. Fortunately, the kernel defines this bit to
be Altivec-register-large all the time, rather than trying to
twiddle it based on the specific platform. */
union {
/* SPE vector registers. One extra for SPEFSCR. */
uint32_t spe[33];
/* Altivec vector registers. The packing of VSCR and VRSAVE
varies depending on whether we're PPC64 or not: PPC64 splits
them apart; PPC32 stuffs them together.
We also need to account for the VSX registers on PPC64
*/
#if defined(TARGET_PPC64)
#define QEMU_NVRREG (34 + 16)
/* On ppc64, this mcontext structure is naturally *unaligned*,
* or rather it is aligned on a 8 bytes boundary but not on
* a 16 bytes one. This pad fixes it up. This is also why the
* vector regs are referenced by the v_regs pointer above so
* any amount of padding can be added here
*/
target_ulong pad;
#else
/* On ppc32, we are already aligned to 16 bytes */
#define QEMU_NVRREG 33
#endif
/* We cannot use ppc_avr_t here as we do *not* want the implied
* 16-bytes alignment that would result from it. This would have
* the effect of making the whole struct target_mcontext aligned
* which breaks the layout of struct target_ucontext on ppc64.
*/
uint64_t altivec[QEMU_NVRREG][2];
#undef QEMU_NVRREG
} mc_vregs;
};
/* See arch/powerpc/include/asm/sigcontext.h. */
struct target_sigcontext {
target_ulong _unused[4];
int32_t signal;
#if defined(TARGET_PPC64)
int32_t pad0;
#endif
target_ulong handler;
target_ulong oldmask;
target_ulong regs; /* struct pt_regs __user * */
#if defined(TARGET_PPC64)
struct target_mcontext mcontext;
#endif
};
/* Indices for target_mcontext.mc_gregs, below.
See arch/powerpc/include/asm/ptrace.h for details. */
enum {
TARGET_PT_R0 = 0,
TARGET_PT_R1 = 1,
TARGET_PT_R2 = 2,
TARGET_PT_R3 = 3,
TARGET_PT_R4 = 4,
TARGET_PT_R5 = 5,
TARGET_PT_R6 = 6,
TARGET_PT_R7 = 7,
TARGET_PT_R8 = 8,
TARGET_PT_R9 = 9,
TARGET_PT_R10 = 10,
TARGET_PT_R11 = 11,
TARGET_PT_R12 = 12,
TARGET_PT_R13 = 13,
TARGET_PT_R14 = 14,
TARGET_PT_R15 = 15,
TARGET_PT_R16 = 16,
TARGET_PT_R17 = 17,
TARGET_PT_R18 = 18,
TARGET_PT_R19 = 19,
TARGET_PT_R20 = 20,
TARGET_PT_R21 = 21,
TARGET_PT_R22 = 22,
TARGET_PT_R23 = 23,
TARGET_PT_R24 = 24,
TARGET_PT_R25 = 25,
TARGET_PT_R26 = 26,
TARGET_PT_R27 = 27,
TARGET_PT_R28 = 28,
TARGET_PT_R29 = 29,
TARGET_PT_R30 = 30,
TARGET_PT_R31 = 31,
TARGET_PT_NIP = 32,
TARGET_PT_MSR = 33,
TARGET_PT_ORIG_R3 = 34,
TARGET_PT_CTR = 35,
TARGET_PT_LNK = 36,
TARGET_PT_XER = 37,
TARGET_PT_CCR = 38,
/* Yes, there are two registers with #39. One is 64-bit only. */
TARGET_PT_MQ = 39,
TARGET_PT_SOFTE = 39,
TARGET_PT_TRAP = 40,
TARGET_PT_DAR = 41,
TARGET_PT_DSISR = 42,
TARGET_PT_RESULT = 43,
TARGET_PT_REGS_COUNT = 44
};
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link; /* ucontext_t __user * */
struct target_sigaltstack tuc_stack;
#if !defined(TARGET_PPC64)
int32_t tuc_pad[7];
target_ulong tuc_regs; /* struct mcontext __user *
points to uc_mcontext field */
#endif
target_sigset_t tuc_sigmask;
#if defined(TARGET_PPC64)
target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
struct target_sigcontext tuc_sigcontext;
#else
int32_t tuc_maskext[30];
int32_t tuc_pad2[3];
struct target_mcontext tuc_mcontext;
#endif
};
/* See arch/powerpc/kernel/signal_32.c. */
struct target_sigframe {
struct target_sigcontext sctx;
struct target_mcontext mctx;
int32_t abigap[56];
};
#if defined(TARGET_PPC64)
#define TARGET_TRAMP_SIZE 6
struct target_rt_sigframe {
/* sys_rt_sigreturn requires the ucontext be the first field */
struct target_ucontext uc;
target_ulong _unused[2];
uint32_t trampoline[TARGET_TRAMP_SIZE];
target_ulong pinfo; /* struct siginfo __user * */
target_ulong puc; /* void __user * */
struct target_siginfo info;
/* 64 bit ABI allows for 288 bytes below sp before decrementing it. */
char abigap[288];
} __attribute__((aligned(16)));
#else
struct target_rt_sigframe {
struct target_siginfo info;
struct target_ucontext uc;
int32_t abigap[56];
};
#endif
#if defined(TARGET_PPC64)
struct target_func_ptr {
target_ulong entry;
target_ulong toc;
};
#endif
/* We use the mc_pad field for the signal return trampoline. */
#define tramp mc_pad
/* See arch/powerpc/kernel/signal.c. */
static target_ulong get_sigframe(struct target_sigaction *ka,
CPUPPCState *env,
int frame_size)
{
target_ulong oldsp;
oldsp = env->gpr[1];
if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
(sas_ss_flags(oldsp) == 0)) {
oldsp = (target_sigaltstack_used.ss_sp
+ target_sigaltstack_used.ss_size);
}
return (oldsp - frame_size) & ~0xFUL;
}
#if ((defined(TARGET_WORDS_BIGENDIAN) && defined(HOST_WORDS_BIGENDIAN)) || \
(!defined(HOST_WORDS_BIGENDIAN) && !defined(TARGET_WORDS_BIGENDIAN)))
#define PPC_VEC_HI 0
#define PPC_VEC_LO 1
#else
#define PPC_VEC_HI 1
#define PPC_VEC_LO 0
#endif
static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame)
{
target_ulong msr = env->msr;
int i;
target_ulong ccr = 0;
/* In general, the kernel attempts to be intelligent about what it
needs to save for Altivec/FP/SPE registers. We don't care that
much, so we just go ahead and save everything. */
/* Save general registers. */
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
__put_user(env->gpr[i], &frame->mc_gregs[i]);
}
__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
__put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
__put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
__put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
ccr |= env->crf[i] << (32 - ((i + 1) * 4));
}
__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
/* Save Altivec registers if necessary. */
if (env->insns_flags & PPC_ALTIVEC) {
uint32_t *vrsave;
for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
ppc_avr_t *avr = &env->avr[i];
ppc_avr_t *vreg = (ppc_avr_t *)&frame->mc_vregs.altivec[i];
__put_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
__put_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
}
/* Set MSR_VR in the saved MSR value to indicate that
frame->mc_vregs contains valid data. */
msr |= MSR_VR;
#if defined(TARGET_PPC64)
vrsave = (uint32_t *)&frame->mc_vregs.altivec[33];
/* 64-bit needs to put a pointer to the vectors in the frame */
__put_user(h2g(frame->mc_vregs.altivec), &frame->v_regs);
#else
vrsave = (uint32_t *)&frame->mc_vregs.altivec[32];
#endif
__put_user((uint32_t)env->spr[SPR_VRSAVE], vrsave);
}
/* Save VSX second halves */
if (env->insns_flags2 & PPC2_VSX) {
uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
__put_user(env->vsr[i], &vsregs[i]);
}
}
/* Save floating point registers. */
if (env->insns_flags & PPC_FLOAT) {
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
__put_user(env->fpr[i], &frame->mc_fregs[i]);
}
__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]);
}
/* Save SPE registers. The kernel only saves the high half. */
if (env->insns_flags & PPC_SPE) {
#if defined(TARGET_PPC64)
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i]);
}
#else
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
__put_user(env->gprh[i], &frame->mc_vregs.spe[i]);
}
#endif
/* Set MSR_SPE in the saved MSR value to indicate that
frame->mc_vregs contains valid data. */
msr |= MSR_SPE;
__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
}
/* Store MSR. */
__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
}
static void encode_trampoline(int sigret, uint32_t *tramp)
{
/* Set up the sigreturn trampoline: li r0,sigret; sc. */
if (sigret) {
__put_user(0x38000000 | sigret, &tramp[0]);
__put_user(0x44000002, &tramp[1]);
}
}
static void restore_user_regs(CPUPPCState *env,
struct target_mcontext *frame, int sig)
{
target_ulong save_r2 = 0;
target_ulong msr;
target_ulong ccr;
int i;
if (!sig) {
save_r2 = env->gpr[2];
}
/* Restore general registers. */
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
__get_user(env->gpr[i], &frame->mc_gregs[i]);
}
__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
__get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
__get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
__get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
}
if (!sig) {
env->gpr[2] = save_r2;
}
/* Restore MSR. */
__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
/* If doing signal return, restore the previous little-endian mode. */
if (sig)
env->msr = (env->msr & ~(1ull << MSR_LE)) | (msr & (1ull << MSR_LE));
/* Restore Altivec registers if necessary. */
if (env->insns_flags & PPC_ALTIVEC) {
ppc_avr_t *v_regs;
uint32_t *vrsave;
#if defined(TARGET_PPC64)
uint64_t v_addr;
/* 64-bit needs to recover the pointer to the vectors from the frame */
__get_user(v_addr, &frame->v_regs);
v_regs = g2h(v_addr);
#else
v_regs = (ppc_avr_t *)frame->mc_vregs.altivec;
#endif
for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
ppc_avr_t *avr = &env->avr[i];
ppc_avr_t *vreg = &v_regs[i];
__get_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
__get_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
}
/* Set MSR_VEC in the saved MSR value to indicate that
frame->mc_vregs contains valid data. */
#if defined(TARGET_PPC64)
vrsave = (uint32_t *)&v_regs[33];
#else
vrsave = (uint32_t *)&v_regs[32];
#endif
__get_user(env->spr[SPR_VRSAVE], vrsave);
}
/* Restore VSX second halves */
if (env->insns_flags2 & PPC2_VSX) {
uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
__get_user(env->vsr[i], &vsregs[i]);
}
}
/* Restore floating point registers. */
if (env->insns_flags & PPC_FLOAT) {
uint64_t fpscr;
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
__get_user(env->fpr[i], &frame->mc_fregs[i]);
}
__get_user(fpscr, &frame->mc_fregs[32]);
env->fpscr = (uint32_t) fpscr;
}
/* Save SPE registers. The kernel only saves the high half. */
if (env->insns_flags & PPC_SPE) {
#if defined(TARGET_PPC64)
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
uint32_t hi;
__get_user(hi, &frame->mc_vregs.spe[i]);
env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
}
#else
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
__get_user(env->gprh[i], &frame->mc_vregs.spe[i]);
}
#endif
__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
}
}
#if !defined(TARGET_PPC64)
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUPPCState *env)
{
struct target_sigframe *frame;
struct target_sigcontext *sc;
target_ulong frame_addr, newsp;
int err = 0;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
goto sigsegv;
sc = &frame->sctx;
__put_user(ka->_sa_handler, &sc->handler);
__put_user(set->sig[0], &sc->oldmask);
__put_user(set->sig[1], &sc->_unused[3]);
__put_user(h2g(&frame->mctx), &sc->regs);
__put_user(sig, &sc->signal);
/* Save user regs. */
save_user_regs(env, &frame->mctx);
/* Construct the trampoline code on the stack. */
encode_trampoline(TARGET_NR_sigreturn, (uint32_t *)&frame->mctx.tramp);
/* The kernel checks for the presence of a VDSO here. We don't
emulate a vdso, so use a sigreturn system call. */
env->lr = (target_ulong) h2g(frame->mctx.tramp);
/* Turn off all fp exceptions. */
env->fpscr = 0;
/* Create a stack frame for the caller of the handler. */
newsp = frame_addr - SIGNAL_FRAMESIZE;
err |= put_user(env->gpr[1], newsp, target_ulong);
if (err)
goto sigsegv;
/* Set up registers for signal handler. */
env->gpr[1] = newsp;
env->gpr[3] = sig;
env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
env->nip = (target_ulong) ka->_sa_handler;
/* Signal handlers are entered in big-endian mode. */
env->msr &= ~(1ull << MSR_LE);
unlock_user_struct(frame, frame_addr, 1);
return;
sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
#endif /* !defined(TARGET_PPC64) */
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUPPCState *env)
{
struct target_rt_sigframe *rt_sf;
uint32_t *trampptr = 0;
struct target_mcontext *mctx = 0;
target_ulong rt_sf_addr, newsp = 0;
int i, err = 0;
#if defined(TARGET_PPC64)
struct target_sigcontext *sc = 0;
struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
#endif
rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
goto sigsegv;
tswap_siginfo(&rt_sf->info, info);
__put_user(0, &rt_sf->uc.tuc_flags);
__put_user(0, &rt_sf->uc.tuc_link);
__put_user((target_ulong)target_sigaltstack_used.ss_sp,
&rt_sf->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->gpr[1]),
&rt_sf->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&rt_sf->uc.tuc_stack.ss_size);
#if !defined(TARGET_PPC64)
__put_user(h2g (&rt_sf->uc.tuc_mcontext),
&rt_sf->uc.tuc_regs);
#endif
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
}
#if defined(TARGET_PPC64)
mctx = &rt_sf->uc.tuc_sigcontext.mcontext;
trampptr = &rt_sf->trampoline[0];
sc = &rt_sf->uc.tuc_sigcontext;
__put_user(h2g(mctx), &sc->regs);
__put_user(sig, &sc->signal);
#else
mctx = &rt_sf->uc.tuc_mcontext;
trampptr = (uint32_t *)&rt_sf->uc.tuc_mcontext.tramp;
#endif
save_user_regs(env, mctx);
encode_trampoline(TARGET_NR_rt_sigreturn, trampptr);
/* The kernel checks for the presence of a VDSO here. We don't
emulate a vdso, so use a sigreturn system call. */
env->lr = (target_ulong) h2g(trampptr);
/* Turn off all fp exceptions. */
env->fpscr = 0;
/* Create a stack frame for the caller of the handler. */
newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
err |= put_user(env->gpr[1], newsp, target_ulong);
if (err)
goto sigsegv;
/* Set up registers for signal handler. */
env->gpr[1] = newsp;
env->gpr[3] = (target_ulong) sig;
env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
env->gpr[6] = (target_ulong) h2g(rt_sf);
#if defined(TARGET_PPC64)
if (get_ppc64_abi(image) < 2) {
/* ELFv1 PPC64 function pointers are pointers to OPD entries. */
struct target_func_ptr *handler =
(struct target_func_ptr *)g2h(ka->_sa_handler);
env->nip = tswapl(handler->entry);
env->gpr[2] = tswapl(handler->toc);
} else {
/* ELFv2 PPC64 function pointers are entry points, but R12
* must also be set */
env->nip = tswapl((target_ulong) ka->_sa_handler);
env->gpr[12] = env->nip;
}
#else
env->nip = (target_ulong) ka->_sa_handler;
#endif
/* Signal handlers are entered in big-endian mode. */
env->msr &= ~(1ull << MSR_LE);
unlock_user_struct(rt_sf, rt_sf_addr, 1);
return;
sigsegv:
unlock_user_struct(rt_sf, rt_sf_addr, 1);
force_sigsegv(sig);
}
#if !defined(TARGET_PPC64)
long do_sigreturn(CPUPPCState *env)
{
struct target_sigcontext *sc = NULL;
struct target_mcontext *sr = NULL;
target_ulong sr_addr = 0, sc_addr;
sigset_t blocked;
target_sigset_t set;
sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
goto sigsegv;
#if defined(TARGET_PPC64)
set.sig[0] = sc->oldmask + ((uint64_t)(sc->_unused[3]) << 32);
#else
__get_user(set.sig[0], &sc->oldmask);
__get_user(set.sig[1], &sc->_unused[3]);
#endif
target_to_host_sigset_internal(&blocked, &set);
set_sigmask(&blocked);
__get_user(sr_addr, &sc->regs);
if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
goto sigsegv;
restore_user_regs(env, sr, 1);
unlock_user_struct(sr, sr_addr, 1);
unlock_user_struct(sc, sc_addr, 1);
return -TARGET_QEMU_ESIGRETURN;
sigsegv:
unlock_user_struct(sr, sr_addr, 1);
unlock_user_struct(sc, sc_addr, 1);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
#endif /* !defined(TARGET_PPC64) */
/* See arch/powerpc/kernel/signal_32.c. */
static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
{
struct target_mcontext *mcp;
target_ulong mcp_addr;
sigset_t blocked;
target_sigset_t set;
if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
sizeof (set)))
return 1;
#if defined(TARGET_PPC64)
mcp_addr = h2g(ucp) +
offsetof(struct target_ucontext, tuc_sigcontext.mcontext);
#else
__get_user(mcp_addr, &ucp->tuc_regs);
#endif
if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
return 1;
target_to_host_sigset_internal(&blocked, &set);
set_sigmask(&blocked);
restore_user_regs(env, mcp, sig);
unlock_user_struct(mcp, mcp_addr, 1);
return 0;
}
long do_rt_sigreturn(CPUPPCState *env)
{
struct target_rt_sigframe *rt_sf = NULL;
target_ulong rt_sf_addr;
rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
goto sigsegv;
if (do_setcontext(&rt_sf->uc, env, 1))
goto sigsegv;
do_sigaltstack(rt_sf_addr
+ offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, env->gpr[1]);
unlock_user_struct(rt_sf, rt_sf_addr, 1);
return -TARGET_QEMU_ESIGRETURN;
sigsegv:
unlock_user_struct(rt_sf, rt_sf_addr, 1);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

4
linux-user/ppc/target_signal.h
View file

@ -26,5 +26,7 @@ static inline abi_ulong get_sp_from_cpustate(CPUPPCState *state)
return state->gpr[1];
}
#if !defined(TARGET_PPC64)
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif
#endif /* PPC_TARGET_SIGNAL_H */

118
linux-user/riscv/cpu_loop.c Normal file
View file

@ -0,0 +1,118 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPURISCVState *env)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
int trapnr, signum, sigcode;
target_ulong sigaddr;
target_ulong ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
signum = 0;
sigcode = 0;
sigaddr = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case RISCV_EXCP_U_ECALL:
env->pc += 4;
if (env->gpr[xA7] == TARGET_NR_arch_specific_syscall + 15) {
/* riscv_flush_icache_syscall is a no-op in QEMU as
self-modifying code is automatically detected */
ret = 0;
} else {
ret = do_syscall(env,
env->gpr[xA7],
env->gpr[xA0],
env->gpr[xA1],
env->gpr[xA2],
env->gpr[xA3],
env->gpr[xA4],
env->gpr[xA5],
0, 0);
}
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->gpr[xA0] = ret;
}
if (cs->singlestep_enabled) {
goto gdbstep;
}
break;
case RISCV_EXCP_ILLEGAL_INST:
signum = TARGET_SIGILL;
sigcode = TARGET_ILL_ILLOPC;
break;
case RISCV_EXCP_BREAKPOINT:
signum = TARGET_SIGTRAP;
sigcode = TARGET_TRAP_BRKPT;
sigaddr = env->pc;
break;
case RISCV_EXCP_INST_PAGE_FAULT:
case RISCV_EXCP_LOAD_PAGE_FAULT:
case RISCV_EXCP_STORE_PAGE_FAULT:
signum = TARGET_SIGSEGV;
sigcode = TARGET_SEGV_MAPERR;
break;
case EXCP_DEBUG:
gdbstep:
signum = gdb_handlesig(cs, TARGET_SIGTRAP);
sigcode = TARGET_TRAP_BRKPT;
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
exit(EXIT_FAILURE);
}
if (signum) {
target_siginfo_t info = {
.si_signo = signum,
.si_errno = 0,
.si_code = sigcode,
._sifields._sigfault._addr = sigaddr
};
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
env->pc = regs->sepc;
env->gpr[xSP] = regs->sp;
}

218
linux-user/riscv/signal.c Normal file
View file

@ -0,0 +1,218 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
/* Signal handler invocation must be transparent for the code being
interrupted. Complete CPU (hart) state is saved on entry and restored
before returning from the handler. Process sigmask is also saved to block
signals while the handler is running. The handler gets its own stack,
which also doubles as storage for the CPU state and sigmask.
The code below is qemu re-implementation of arch/riscv/kernel/signal.c */
struct target_sigcontext {
abi_long pc;
abi_long gpr[31]; /* x0 is not present, so all offsets must be -1 */
uint64_t fpr[32];
uint32_t fcsr;
}; /* cf. riscv-linux:arch/riscv/include/uapi/asm/ptrace.h */
struct target_ucontext {
unsigned long uc_flags;
struct target_ucontext *uc_link;
target_stack_t uc_stack;
struct target_sigcontext uc_mcontext;
target_sigset_t uc_sigmask;
};
struct target_rt_sigframe {
uint32_t tramp[2]; /* not in kernel, which uses VDSO instead */
struct target_siginfo info;
struct target_ucontext uc;
};
static abi_ulong get_sigframe(struct target_sigaction *ka,
CPURISCVState *regs, size_t framesize)
{
abi_ulong sp = regs->gpr[xSP];
int onsigstack = on_sig_stack(sp);
/* redzone */
/* This is the X/Open sanctioned signal stack switching. */
if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp -= framesize;
sp &= ~3UL; /* align sp on 4-byte boundary */
/* If we are on the alternate signal stack and would overflow it, don't.
Return an always-bogus address instead so we will die with SIGSEGV. */
if (onsigstack && !likely(on_sig_stack(sp))) {
return -1L;
}
return sp;
}
static void setup_sigcontext(struct target_sigcontext *sc, CPURISCVState *env)
{
int i;
__put_user(env->pc, &sc->pc);
for (i = 1; i < 32; i++) {
__put_user(env->gpr[i], &sc->gpr[i - 1]);
}
for (i = 0; i < 32; i++) {
__put_user(env->fpr[i], &sc->fpr[i]);
}
uint32_t fcsr = csr_read_helper(env, CSR_FCSR); /*riscv_get_fcsr(env);*/
__put_user(fcsr, &sc->fcsr);
}
static void setup_ucontext(struct target_ucontext *uc,
CPURISCVState *env, target_sigset_t *set)
{
abi_ulong ss_sp = (target_ulong)target_sigaltstack_used.ss_sp;
abi_ulong ss_flags = sas_ss_flags(env->gpr[xSP]);
abi_ulong ss_size = target_sigaltstack_used.ss_size;
__put_user(0, &(uc->uc_flags));
__put_user(0, &(uc->uc_link));
__put_user(ss_sp, &(uc->uc_stack.ss_sp));
__put_user(ss_flags, &(uc->uc_stack.ss_flags));
__put_user(ss_size, &(uc->uc_stack.ss_size));
int i;
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &(uc->uc_sigmask.sig[i]));
}
setup_sigcontext(&uc->uc_mcontext, env);
}
static inline void install_sigtramp(uint32_t *tramp)
{
__put_user(0x08b00893, tramp + 0); /* li a7, 139 = __NR_rt_sigreturn */
__put_user(0x00000073, tramp + 1); /* ecall */
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPURISCVState *env)
{
abi_ulong frame_addr;
struct target_rt_sigframe *frame;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto badframe;
}
setup_ucontext(&frame->uc, env, set);
tswap_siginfo(&frame->info, info);
install_sigtramp(frame->tramp);
env->pc = ka->_sa_handler;
env->gpr[xSP] = frame_addr;
env->gpr[xA0] = sig;
env->gpr[xA1] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->gpr[xA2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
env->gpr[xRA] = frame_addr + offsetof(struct target_rt_sigframe, tramp);
return;
badframe:
unlock_user_struct(frame, frame_addr, 1);
if (sig == TARGET_SIGSEGV) {
ka->_sa_handler = TARGET_SIG_DFL;
}
force_sig(TARGET_SIGSEGV);
}
static void restore_sigcontext(CPURISCVState *env, struct target_sigcontext *sc)
{
int i;
__get_user(env->pc, &sc->pc);
for (i = 1; i < 32; ++i) {
__get_user(env->gpr[i], &sc->gpr[i - 1]);
}
for (i = 0; i < 32; ++i) {
__get_user(env->fpr[i], &sc->fpr[i]);
}
uint32_t fcsr;
__get_user(fcsr, &sc->fcsr);
csr_write_helper(env, fcsr, CSR_FCSR);
}
static void restore_ucontext(CPURISCVState *env, struct target_ucontext *uc)
{
sigset_t blocked;
target_sigset_t target_set;
int i;
target_sigemptyset(&target_set);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &(uc->uc_sigmask.sig[i]));
}
target_to_host_sigset_internal(&blocked, &target_set);
set_sigmask(&blocked);
restore_sigcontext(env, &uc->uc_mcontext);
}
long do_rt_sigreturn(CPURISCVState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
frame_addr = env->gpr[xSP];
trace_user_do_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
restore_ucontext(env, &frame->uc);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.uc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return 0;
}

1
linux-user/riscv/target_signal.h
View file

@ -19,5 +19,4 @@ static inline abi_ulong get_sp_from_cpustate(CPURISCVState *state)
{
return state->gpr[xSP];
}
#endif /* TARGET_SIGNAL_H */

2
linux-user/riscv/target_syscall.h
View file

@ -45,7 +45,7 @@ struct target_pt_regs {
#else
#define UNAME_MACHINE "riscv64"
#endif
#define UNAME_MINIMUM_RELEASE "3.8.0"
#define UNAME_MINIMUM_RELEASE "4.15.0"
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MLOCKALL_MCL_CURRENT 1

165
linux-user/s390x/cpu_loop.c Normal file
View file

@ -0,0 +1,165 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
/* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */
#define S390X_FAIL_ADDR_MASK -4096LL
void cpu_loop(CPUS390XState *env)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int trapnr, n, sig;
target_siginfo_t info;
target_ulong addr;
abi_long ret;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_INTERRUPT:
/* Just indicate that signals should be handled asap. */
break;
case EXCP_SVC:
n = env->int_svc_code;
if (!n) {
/* syscalls > 255 */
n = env->regs[1];
}
env->psw.addr += env->int_svc_ilen;
ret = do_syscall(env, n, env->regs[2], env->regs[3],
env->regs[4], env->regs[5],
env->regs[6], env->regs[7], 0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->psw.addr -= env->int_svc_ilen;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[2] = ret;
}
break;
case EXCP_DEBUG:
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig) {
n = TARGET_TRAP_BRKPT;
goto do_signal_pc;
}
break;
case EXCP_PGM:
n = env->int_pgm_code;
switch (n) {
case PGM_OPERATION:
case PGM_PRIVILEGED:
sig = TARGET_SIGILL;
n = TARGET_ILL_ILLOPC;
goto do_signal_pc;
case PGM_PROTECTION:
case PGM_ADDRESSING:
sig = TARGET_SIGSEGV;
/* XXX: check env->error_code */
n = TARGET_SEGV_MAPERR;
addr = env->__excp_addr & S390X_FAIL_ADDR_MASK;
goto do_signal;
case PGM_EXECUTE:
case PGM_SPECIFICATION:
case PGM_SPECIAL_OP:
case PGM_OPERAND:
do_sigill_opn:
sig = TARGET_SIGILL;
n = TARGET_ILL_ILLOPN;
goto do_signal_pc;
case PGM_FIXPT_OVERFLOW:
sig = TARGET_SIGFPE;
n = TARGET_FPE_INTOVF;
goto do_signal_pc;
case PGM_FIXPT_DIVIDE:
sig = TARGET_SIGFPE;
n = TARGET_FPE_INTDIV;
goto do_signal_pc;
case PGM_DATA:
n = (env->fpc >> 8) & 0xff;
if (n == 0xff) {
/* compare-and-trap */
goto do_sigill_opn;
} else {
/* An IEEE exception, simulated or otherwise. */
if (n & 0x80) {
n = TARGET_FPE_FLTINV;
} else if (n & 0x40) {
n = TARGET_FPE_FLTDIV;
} else if (n & 0x20) {
n = TARGET_FPE_FLTOVF;
} else if (n & 0x10) {
n = TARGET_FPE_FLTUND;
} else if (n & 0x08) {
n = TARGET_FPE_FLTRES;
} else {
/* ??? Quantum exception; BFP, DFP error. */
goto do_sigill_opn;
}
sig = TARGET_SIGFPE;
goto do_signal_pc;
}
default:
fprintf(stderr, "Unhandled program exception: %#x\n", n);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
break;
do_signal_pc:
addr = env->psw.addr;
do_signal:
info.si_signo = sig;
info.si_errno = 0;
info.si_code = n;
info._sifields._sigfault._addr = addr;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < 16; i++) {
env->regs[i] = regs->gprs[i];
}
env->psw.mask = regs->psw.mask;
env->psw.addr = regs->psw.addr;
}

327
linux-user/s390x/signal.c Normal file
View file

@ -0,0 +1,327 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
#define __NUM_GPRS 16
#define __NUM_FPRS 16
#define __NUM_ACRS 16
#define S390_SYSCALL_SIZE 2
#define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
#define _SIGCONTEXT_NSIG 64
#define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
#define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
#define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
#define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
#define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
typedef struct {
target_psw_t psw;
target_ulong gprs[__NUM_GPRS];
unsigned int acrs[__NUM_ACRS];
} target_s390_regs_common;
typedef struct {
unsigned int fpc;
double fprs[__NUM_FPRS];
} target_s390_fp_regs;
typedef struct {
target_s390_regs_common regs;
target_s390_fp_regs fpregs;
} target_sigregs;
struct target_sigcontext {
target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
target_sigregs *sregs;
};
typedef struct {
uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
struct target_sigcontext sc;
target_sigregs sregs;
int signo;
uint8_t retcode[S390_SYSCALL_SIZE];
} sigframe;
struct target_ucontext {
target_ulong tuc_flags;
struct target_ucontext *tuc_link;
target_stack_t tuc_stack;
target_sigregs tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
typedef struct {
uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
uint8_t retcode[S390_SYSCALL_SIZE];
struct target_siginfo info;
struct target_ucontext uc;
} rt_sigframe;
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
{
abi_ulong sp;
/* Default to using normal stack */
sp = env->regs[15];
/* This is the X/Open sanctioned signal stack switching. */
if (ka->sa_flags & TARGET_SA_ONSTACK) {
if (!sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp +
target_sigaltstack_used.ss_size;
}
}
/* This is the legacy signal stack switching. */
else if (/* FIXME !user_mode(regs) */ 0 &&
!(ka->sa_flags & TARGET_SA_RESTORER) &&
ka->sa_restorer) {
sp = (abi_ulong) ka->sa_restorer;
}
return (sp - frame_size) & -8ul;
}
static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
{
int i;
//save_access_regs(current->thread.acrs); FIXME
/* Copy a 'clean' PSW mask to the user to avoid leaking
information about whether PER is currently on. */
__put_user(env->psw.mask, &sregs->regs.psw.mask);
__put_user(env->psw.addr, &sregs->regs.psw.addr);
for (i = 0; i < 16; i++) {
__put_user(env->regs[i], &sregs->regs.gprs[i]);
}
for (i = 0; i < 16; i++) {
__put_user(env->aregs[i], &sregs->regs.acrs[i]);
}
/*
* We have to store the fp registers to current->thread.fp_regs
* to merge them with the emulated registers.
*/
//save_fp_regs(&current->thread.fp_regs); FIXME
for (i = 0; i < 16; i++) {
__put_user(get_freg(env, i)->ll, &sregs->fpregs.fprs[i]);
}
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUS390XState *env)
{
sigframe *frame;
abi_ulong frame_addr;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
__put_user(set->sig[0], &frame->sc.oldmask[0]);
save_sigregs(env, &frame->sregs);
__put_user((abi_ulong)(unsigned long)&frame->sregs,
(abi_ulong *)&frame->sc.sregs);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa_flags & TARGET_SA_RESTORER) {
env->regs[14] = (unsigned long)
ka->sa_restorer | PSW_ADDR_AMODE;
} else {
env->regs[14] = (frame_addr + offsetof(sigframe, retcode))
| PSW_ADDR_AMODE;
__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
(uint16_t *)(frame->retcode));
}
/* Set up backchain. */
__put_user(env->regs[15], (abi_ulong *) frame);
/* Set up registers for signal handler */
env->regs[15] = frame_addr;
env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
env->regs[2] = sig; //map_signal(sig);
env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
/* We forgot to include these in the sigcontext.
To avoid breaking binary compatibility, they are passed as args. */
env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
/* Place signal number on stack to allow backtrace from handler. */
__put_user(env->regs[2], &frame->signo);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUS390XState *env)
{
int i;
rt_sigframe *frame;
abi_ulong frame_addr;
frame_addr = get_sigframe(ka, env, sizeof *frame);
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
tswap_siginfo(&frame->info, info);
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
save_sigregs(env, &frame->uc.tuc_mcontext);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user((abi_ulong)set->sig[i],
(abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa_flags & TARGET_SA_RESTORER) {
env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
} else {
env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
(uint16_t *)(frame->retcode));
}
/* Set up backchain. */
__put_user(env->regs[15], (abi_ulong *) frame);
/* Set up registers for signal handler */
env->regs[15] = frame_addr;
env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
env->regs[2] = sig; //map_signal(sig);
env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
return;
give_sigsegv:
force_sigsegv(sig);
}
static int
restore_sigregs(CPUS390XState *env, target_sigregs *sc)
{
int err = 0;
int i;
for (i = 0; i < 16; i++) {
__get_user(env->regs[i], &sc->regs.gprs[i]);
}
__get_user(env->psw.mask, &sc->regs.psw.mask);
trace_user_s390x_restore_sigregs(env, (unsigned long long)sc->regs.psw.addr,
(unsigned long long)env->psw.addr);
__get_user(env->psw.addr, &sc->regs.psw.addr);
/* FIXME: 31-bit -> | PSW_ADDR_AMODE */
for (i = 0; i < 16; i++) {
__get_user(env->aregs[i], &sc->regs.acrs[i]);
}
for (i = 0; i < 16; i++) {
__get_user(get_freg(env, i)->ll, &sc->fpregs.fprs[i]);
}
return err;
}
long do_sigreturn(CPUS390XState *env)
{
sigframe *frame;
abi_ulong frame_addr = env->regs[15];
target_sigset_t target_set;
sigset_t set;
trace_user_do_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
__get_user(target_set.sig[0], &frame->sc.oldmask[0]);
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set); /* ~_BLOCKABLE? */
if (restore_sigregs(env, &frame->sregs)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUS390XState *env)
{
rt_sigframe *frame;
abi_ulong frame_addr = env->regs[15];
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set); /* ~_BLOCKABLE? */
if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
goto badframe;
}
if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

2
linux-user/s390x/target_signal.h
View file

@ -23,5 +23,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUS390XState *state)
return state->regs[15];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* S390X_TARGET_SIGNAL_H */

111
linux-user/sh4/cpu_loop.c Normal file
View file

@ -0,0 +1,111 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
void cpu_loop(CPUSH4State *env)
{
CPUState *cs = CPU(sh_env_get_cpu(env));
int trapnr, ret;
target_siginfo_t info;
while (1) {
bool arch_interrupt = true;
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0x160:
env->pc += 2;
ret = do_syscall(env,
env->gregs[3],
env->gregs[4],
env->gregs[5],
env->gregs[6],
env->gregs[7],
env->gregs[0],
env->gregs[1],
0, 0);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 2;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->gregs[0] = ret;
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig) {
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
} else {
arch_interrupt = false;
}
}
break;
case 0xa0:
case 0xc0:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->tea;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
arch_interrupt = false;
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
/* Most of the traps imply an exception or interrupt, which
implies an REI instruction has been executed. Which means
that LDST (aka LOK_ADDR) should be cleared. But there are
a few exceptions for traps internal to QEMU. */
if (arch_interrupt) {
env->lock_addr = -1;
}
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for(i = 0; i < 16; i++) {
env->gregs[i] = regs->regs[i];
}
env->pc = regs->pc;
}

350
linux-user/sh4/signal.c Normal file
View file

@ -0,0 +1,350 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
/*
* code and data structures from linux kernel:
* include/asm-sh/sigcontext.h
* arch/sh/kernel/signal.c
*/
struct target_sigcontext {
target_ulong oldmask;
/* CPU registers */
target_ulong sc_gregs[16];
target_ulong sc_pc;
target_ulong sc_pr;
target_ulong sc_sr;
target_ulong sc_gbr;
target_ulong sc_mach;
target_ulong sc_macl;
/* FPU registers */
target_ulong sc_fpregs[16];
target_ulong sc_xfpregs[16];
unsigned int sc_fpscr;
unsigned int sc_fpul;
unsigned int sc_ownedfp;
};
struct target_sigframe
{
struct target_sigcontext sc;
target_ulong extramask[TARGET_NSIG_WORDS-1];
uint16_t retcode[3];
};
struct target_ucontext {
target_ulong tuc_flags;
struct target_ucontext *tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_rt_sigframe
{
struct target_siginfo info;
struct target_ucontext uc;
uint16_t retcode[3];
};
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
static abi_ulong get_sigframe(struct target_sigaction *ka,
unsigned long sp, size_t frame_size)
{
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return (sp - frame_size) & -8ul;
}
/* Notice when we're in the middle of a gUSA region and reset.
Note that this will only occur for !parallel_cpus, as we will
translate such sequences differently in a parallel context. */
static void unwind_gusa(CPUSH4State *regs)
{
/* If the stack pointer is sufficiently negative, and we haven't
completed the sequence, then reset to the entry to the region. */
/* ??? The SH4 kernel checks for and address above 0xC0000000.
However, the page mappings in qemu linux-user aren't as restricted
and we wind up with the normal stack mapped above 0xF0000000.
That said, there is no reason why the kernel should be allowing
a gUSA region that spans 1GB. Use a tighter check here, for what
can actually be enabled by the immediate move. */
if (regs->gregs[15] >= -128u && regs->pc < regs->gregs[0]) {
/* Reset the PC to before the gUSA region, as computed from
R0 = region end, SP = -(region size), plus one more for the
insn that actually initializes SP to the region size. */
regs->pc = regs->gregs[0] + regs->gregs[15] - 2;
/* Reset the SP to the saved version in R1. */
regs->gregs[15] = regs->gregs[1];
}
}
static void setup_sigcontext(struct target_sigcontext *sc,
CPUSH4State *regs, unsigned long mask)
{
int i;
#define COPY(x) __put_user(regs->x, &sc->sc_##x)
COPY(gregs[0]); COPY(gregs[1]);
COPY(gregs[2]); COPY(gregs[3]);
COPY(gregs[4]); COPY(gregs[5]);
COPY(gregs[6]); COPY(gregs[7]);
COPY(gregs[8]); COPY(gregs[9]);
COPY(gregs[10]); COPY(gregs[11]);
COPY(gregs[12]); COPY(gregs[13]);
COPY(gregs[14]); COPY(gregs[15]);
COPY(gbr); COPY(mach);
COPY(macl); COPY(pr);
COPY(sr); COPY(pc);
#undef COPY
for (i=0; i<16; i++) {
__put_user(regs->fregs[i], &sc->sc_fpregs[i]);
}
__put_user(regs->fpscr, &sc->sc_fpscr);
__put_user(regs->fpul, &sc->sc_fpul);
/* non-iBCS2 extensions.. */
__put_user(mask, &sc->oldmask);
}
static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc)
{
int i;
#define COPY(x) __get_user(regs->x, &sc->sc_##x)
COPY(gregs[0]); COPY(gregs[1]);
COPY(gregs[2]); COPY(gregs[3]);
COPY(gregs[4]); COPY(gregs[5]);
COPY(gregs[6]); COPY(gregs[7]);
COPY(gregs[8]); COPY(gregs[9]);
COPY(gregs[10]); COPY(gregs[11]);
COPY(gregs[12]); COPY(gregs[13]);
COPY(gregs[14]); COPY(gregs[15]);
COPY(gbr); COPY(mach);
COPY(macl); COPY(pr);
COPY(sr); COPY(pc);
#undef COPY
for (i=0; i<16; i++) {
__get_user(regs->fregs[i], &sc->sc_fpregs[i]);
}
__get_user(regs->fpscr, &sc->sc_fpscr);
__get_user(regs->fpul, &sc->sc_fpul);
regs->tra = -1; /* disable syscall checks */
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUSH4State *regs)
{
struct target_sigframe *frame;
abi_ulong frame_addr;
int i;
unwind_gusa(regs);
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
trace_user_setup_frame(regs, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
setup_sigcontext(&frame->sc, regs, set->sig[0]);
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
__put_user(set->sig[i + 1], &frame->extramask[i]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa_flags & TARGET_SA_RESTORER) {
regs->pr = (unsigned long) ka->sa_restorer;
} else {
/* Generate return code (system call to sigreturn) */
abi_ulong retcode_addr = frame_addr +
offsetof(struct target_sigframe, retcode);
__put_user(MOVW(2), &frame->retcode[0]);
__put_user(TRAP_NOARG, &frame->retcode[1]);
__put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
regs->pr = (unsigned long) retcode_addr;
}
/* Set up registers for signal handler */
regs->gregs[15] = frame_addr;
regs->gregs[4] = sig; /* Arg for signal handler */
regs->gregs[5] = 0;
regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
regs->pc = (unsigned long) ka->_sa_handler;
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUSH4State *regs)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
int i;
unwind_gusa(regs);
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
trace_user_setup_rt_frame(regs, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
tswap_siginfo(&frame->info, info);
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, (unsigned long *)&frame->uc.tuc_link);
__put_user((unsigned long)target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(regs->gregs[15]),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
setup_sigcontext(&frame->uc.tuc_mcontext,
regs, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa_flags & TARGET_SA_RESTORER) {
regs->pr = (unsigned long) ka->sa_restorer;
} else {
/* Generate return code (system call to sigreturn) */
abi_ulong retcode_addr = frame_addr +
offsetof(struct target_rt_sigframe, retcode);
__put_user(MOVW(2), &frame->retcode[0]);
__put_user(TRAP_NOARG, &frame->retcode[1]);
__put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
regs->pr = (unsigned long) retcode_addr;
}
/* Set up registers for signal handler */
regs->gregs[15] = frame_addr;
regs->gregs[4] = sig; /* Arg for signal handler */
regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
regs->pc = (unsigned long) ka->_sa_handler;
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
unlock_user_struct(frame, frame_addr, 1);
force_sigsegv(sig);
}
long do_sigreturn(CPUSH4State *regs)
{
struct target_sigframe *frame;
abi_ulong frame_addr;
sigset_t blocked;
target_sigset_t target_set;
int i;
int err = 0;
frame_addr = regs->gregs[15];
trace_user_do_sigreturn(regs, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
__get_user(target_set.sig[0], &frame->sc.oldmask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
}
if (err)
goto badframe;
target_to_host_sigset_internal(&blocked, &target_set);
set_sigmask(&blocked);
restore_sigcontext(regs, &frame->sc);
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUSH4State *regs)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
sigset_t blocked;
frame_addr = regs->gregs[15];
trace_user_do_rt_sigreturn(regs, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
set_sigmask(&blocked);
restore_sigcontext(regs, &frame->uc.tuc_mcontext);
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, get_sp_from_cpustate(regs)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

2
linux-user/sh4/target_signal.h
View file

@ -26,5 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSH4State *state)
return state->gregs[15];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* SH4_TARGET_SIGNAL_H */

57
linux-user/signal-common.h Normal file
View file

@ -0,0 +1,57 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SIGNAL_COMMON_H
#define SIGNAL_COMMON_H
extern struct target_sigaltstack target_sigaltstack_used;
static inline int on_sig_stack(unsigned long sp)
{
return (sp - target_sigaltstack_used.ss_sp
< target_sigaltstack_used.ss_size);
}
static inline int sas_ss_flags(unsigned long sp)
{
return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
: on_sig_stack(sp) ? SS_ONSTACK : 0);
}
static inline void target_sigemptyset(target_sigset_t *set)
{
memset(set, 0, sizeof(*set));
}
void host_to_target_sigset_internal(target_sigset_t *d,
const sigset_t *s);
void target_to_host_sigset_internal(sigset_t *d,
const target_sigset_t *s);
void tswap_siginfo(target_siginfo_t *tinfo,
const target_siginfo_t *info);
void set_sigmask(const sigset_t *set);
void force_sig(int sig);
void force_sigsegv(int oldsig);
#if defined(TARGET_ARCH_HAS_SETUP_FRAME)
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUArchState *env);
#endif
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUArchState *env);
#endif

6542
linux-user/signal.c
View file

File diff suppressed because it is too large Load diff

306
linux-user/sparc/cpu_loop.c Normal file
View file

@ -0,0 +1,306 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
#define SPARC64_STACK_BIAS 2047
//#define DEBUG_WIN
/* WARNING: dealing with register windows _is_ complicated. More info
can be found at http://www.sics.se/~psm/sparcstack.html */
static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
{
index = (index + cwp * 16) % (16 * env->nwindows);
/* wrap handling : if cwp is on the last window, then we use the
registers 'after' the end */
if (index < 8 && env->cwp == env->nwindows - 1)
index += 16 * env->nwindows;
return index;
}
/* save the register window 'cwp1' */
static inline void save_window_offset(CPUSPARCState *env, int cwp1)
{
unsigned int i;
abi_ulong sp_ptr;
sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
#ifdef TARGET_SPARC64
if (sp_ptr & 3)
sp_ptr += SPARC64_STACK_BIAS;
#endif
#if defined(DEBUG_WIN)
printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++) {
/* FIXME - what to do if put_user() fails? */
put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
sp_ptr += sizeof(abi_ulong);
}
}
static void save_window(CPUSPARCState *env)
{
#ifndef TARGET_SPARC64
unsigned int new_wim;
new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
((1LL << env->nwindows) - 1);
save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
env->wim = new_wim;
#else
save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
env->cansave++;
env->canrestore--;
#endif
}
static void restore_window(CPUSPARCState *env)
{
#ifndef TARGET_SPARC64
unsigned int new_wim;
#endif
unsigned int i, cwp1;
abi_ulong sp_ptr;
#ifndef TARGET_SPARC64
new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
((1LL << env->nwindows) - 1);
#endif
/* restore the invalid window */
cwp1 = cpu_cwp_inc(env, env->cwp + 1);
sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
#ifdef TARGET_SPARC64
if (sp_ptr & 3)
sp_ptr += SPARC64_STACK_BIAS;
#endif
#if defined(DEBUG_WIN)
printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++) {
/* FIXME - what to do if get_user() fails? */
get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
sp_ptr += sizeof(abi_ulong);
}
#ifdef TARGET_SPARC64
env->canrestore++;
if (env->cleanwin < env->nwindows - 1)
env->cleanwin++;
env->cansave--;
#else
env->wim = new_wim;
#endif
}
static void flush_windows(CPUSPARCState *env)
{
int offset, cwp1;
offset = 1;
for(;;) {
/* if restore would invoke restore_window(), then we can stop */
cwp1 = cpu_cwp_inc(env, env->cwp + offset);
#ifndef TARGET_SPARC64
if (env->wim & (1 << cwp1))
break;
#else
if (env->canrestore == 0)
break;
env->cansave++;
env->canrestore--;
#endif
save_window_offset(env, cwp1);
offset++;
}
cwp1 = cpu_cwp_inc(env, env->cwp + 1);
#ifndef TARGET_SPARC64
/* set wim so that restore will reload the registers */
env->wim = 1 << cwp1;
#endif
#if defined(DEBUG_WIN)
printf("flush_windows: nb=%d\n", offset - 1);
#endif
}
void cpu_loop (CPUSPARCState *env)
{
CPUState *cs = CPU(sparc_env_get_cpu(env));
int trapnr;
abi_long ret;
target_siginfo_t info;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
/* Compute PSR before exposing state. */
if (env->cc_op != CC_OP_FLAGS) {
cpu_get_psr(env);
}
switch (trapnr) {
#ifndef TARGET_SPARC64
case 0x88:
case 0x90:
#else
case 0x110:
case 0x16d:
#endif
ret = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1],
env->regwptr[2], env->regwptr[3],
env->regwptr[4], env->regwptr[5],
0, 0);
if (ret == -TARGET_ERESTARTSYS || ret == -TARGET_QEMU_ESIGRETURN) {
break;
}
if ((abi_ulong)ret >= (abi_ulong)(-515)) {
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
env->xcc |= PSR_CARRY;
#else
env->psr |= PSR_CARRY;
#endif
ret = -ret;
} else {
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
env->xcc &= ~PSR_CARRY;
#else
env->psr &= ~PSR_CARRY;
#endif
}
env->regwptr[0] = ret;
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
case 0x83: /* flush windows */
#ifdef TARGET_ABI32
case 0x103:
#endif
flush_windows(env);
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
#ifndef TARGET_SPARC64
case TT_WIN_OVF: /* window overflow */
save_window(env);
break;
case TT_WIN_UNF: /* window underflow */
restore_window(env);
break;
case TT_TFAULT:
case TT_DFAULT:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->mmuregs[4];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
#else
case TT_SPILL: /* window overflow */
save_window(env);
break;
case TT_FILL: /* window underflow */
restore_window(env);
break;
case TT_TFAULT:
case TT_DFAULT:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
if (trapnr == TT_DFAULT)
info._sifields._sigfault._addr = env->dmmu.mmuregs[4];
else
info._sifields._sigfault._addr = cpu_tsptr(env)->tpc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
#ifndef TARGET_ABI32
case 0x16e:
flush_windows(env);
sparc64_get_context(env);
break;
case 0x16f:
flush_windows(env);
sparc64_set_context(env);
break;
#endif
#endif
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case TT_ILL_INSN:
{
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPC;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_DEBUG:
{
int sig;
sig = gdb_handlesig(cs, TARGET_SIGTRAP);
if (sig)
{
info.si_signo = sig;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
}
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(cs, stderr, fprintf, 0);
exit(EXIT_FAILURE);
}
process_pending_signals (env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
env->pc = regs->pc;
env->npc = regs->npc;
env->y = regs->y;
for(i = 0; i < 8; i++)
env->gregs[i] = regs->u_regs[i];
for(i = 0; i < 8; i++)
env->regwptr[i] = regs->u_regs[i + 8];
}

624
linux-user/sparc/signal.c Normal file
View file

@ -0,0 +1,624 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
#define __SUNOS_MAXWIN 31
/* This is what SunOS does, so shall I. */
struct target_sigcontext {
abi_ulong sigc_onstack; /* state to restore */
abi_ulong sigc_mask; /* sigmask to restore */
abi_ulong sigc_sp; /* stack pointer */
abi_ulong sigc_pc; /* program counter */
abi_ulong sigc_npc; /* next program counter */
abi_ulong sigc_psr; /* for condition codes etc */
abi_ulong sigc_g1; /* User uses these two registers */
abi_ulong sigc_o0; /* within the trampoline code. */
/* Now comes information regarding the users window set
* at the time of the signal.
*/
abi_ulong sigc_oswins; /* outstanding windows */
/* stack ptrs for each regwin buf */
char *sigc_spbuf[__SUNOS_MAXWIN];
/* Windows to restore after signal */
struct {
abi_ulong locals[8];
abi_ulong ins[8];
} sigc_wbuf[__SUNOS_MAXWIN];
};
/* A Sparc stack frame */
struct sparc_stackf {
abi_ulong locals[8];
abi_ulong ins[8];
/* It's simpler to treat fp and callers_pc as elements of ins[]
* since we never need to access them ourselves.
*/
char *structptr;
abi_ulong xargs[6];
abi_ulong xxargs[1];
};
typedef struct {
struct {
abi_ulong psr;
abi_ulong pc;
abi_ulong npc;
abi_ulong y;
abi_ulong u_regs[16]; /* globals and ins */
} si_regs;
int si_mask;
} __siginfo_t;
typedef struct {
abi_ulong si_float_regs[32];
unsigned long si_fsr;
unsigned long si_fpqdepth;
struct {
unsigned long *insn_addr;
unsigned long insn;
} si_fpqueue [16];
} qemu_siginfo_fpu_t;
struct target_signal_frame {
struct sparc_stackf ss;
__siginfo_t info;
abi_ulong fpu_save;
abi_ulong insns[2] __attribute__ ((aligned (8)));
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
abi_ulong extra_size; /* Should be 0 */
qemu_siginfo_fpu_t fpu_state;
};
struct target_rt_signal_frame {
struct sparc_stackf ss;
siginfo_t info;
abi_ulong regs[20];
sigset_t mask;
abi_ulong fpu_save;
unsigned int insns[2];
stack_t stack;
unsigned int extra_size; /* Should be 0 */
qemu_siginfo_fpu_t fpu_state;
};
#define UREG_O0 16
#define UREG_O6 22
#define UREG_I0 0
#define UREG_I1 1
#define UREG_I2 2
#define UREG_I3 3
#define UREG_I4 4
#define UREG_I5 5
#define UREG_I6 6
#define UREG_I7 7
#define UREG_L0 8
#define UREG_FP UREG_I6
#define UREG_SP UREG_O6
static inline abi_ulong get_sigframe(struct target_sigaction *sa,
CPUSPARCState *env,
unsigned long framesize)
{
abi_ulong sp;
sp = env->regwptr[UREG_FP];
/* This is the X/Open sanctioned signal stack switching. */
if (sa->sa_flags & TARGET_SA_ONSTACK) {
if (!on_sig_stack(sp)
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
}
return sp - framesize;
}
static int
setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
{
int err = 0, i;
__put_user(env->psr, &si->si_regs.psr);
__put_user(env->pc, &si->si_regs.pc);
__put_user(env->npc, &si->si_regs.npc);
__put_user(env->y, &si->si_regs.y);
for (i=0; i < 8; i++) {
__put_user(env->gregs[i], &si->si_regs.u_regs[i]);
}
for (i=0; i < 8; i++) {
__put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
}
__put_user(mask, &si->si_mask);
return err;
}
#if 0
static int
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
CPUSPARCState *env, unsigned long mask)
{
int err = 0;
__put_user(mask, &sc->sigc_mask);
__put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
__put_user(env->pc, &sc->sigc_pc);
__put_user(env->npc, &sc->sigc_npc);
__put_user(env->psr, &sc->sigc_psr);
__put_user(env->gregs[1], &sc->sigc_g1);
__put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
return err;
}
#endif
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUSPARCState *env)
{
abi_ulong sf_addr;
struct target_signal_frame *sf;
int sigframe_size, err, i;
/* 1. Make sure everything is clean */
//synchronize_user_stack();
sigframe_size = NF_ALIGNEDSZ;
sf_addr = get_sigframe(ka, env, sigframe_size);
trace_user_setup_frame(env, sf_addr);
sf = lock_user(VERIFY_WRITE, sf_addr,
sizeof(struct target_signal_frame), 0);
if (!sf) {
goto sigsegv;
}
#if 0
if (invalid_frame_pointer(sf, sigframe_size))
goto sigill_and_return;
#endif
/* 2. Save the current process state */
err = setup___siginfo(&sf->info, env, set->sig[0]);
__put_user(0, &sf->extra_size);
//save_fpu_state(regs, &sf->fpu_state);
//__put_user(&sf->fpu_state, &sf->fpu_save);
__put_user(set->sig[0], &sf->info.si_mask);
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
__put_user(set->sig[i + 1], &sf->extramask[i]);
}
for (i = 0; i < 8; i++) {
__put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
}
for (i = 0; i < 8; i++) {
__put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
}
if (err)
goto sigsegv;
/* 3. signal handler back-trampoline and parameters */
env->regwptr[UREG_FP] = sf_addr;
env->regwptr[UREG_I0] = sig;
env->regwptr[UREG_I1] = sf_addr +
offsetof(struct target_signal_frame, info);
env->regwptr[UREG_I2] = sf_addr +
offsetof(struct target_signal_frame, info);
/* 4. signal handler */
env->pc = ka->_sa_handler;
env->npc = (env->pc + 4);
/* 5. return to kernel instructions */
if (ka->ka_restorer) {
env->regwptr[UREG_I7] = ka->ka_restorer;
} else {
uint32_t val32;
env->regwptr[UREG_I7] = sf_addr +
offsetof(struct target_signal_frame, insns) - 2 * 4;
/* mov __NR_sigreturn, %g1 */
val32 = 0x821020d8;
__put_user(val32, &sf->insns[0]);
/* t 0x10 */
val32 = 0x91d02010;
__put_user(val32, &sf->insns[1]);
if (err)
goto sigsegv;
/* Flush instruction space. */
// flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
// tb_flush(env);
}
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
return;
#if 0
sigill_and_return:
force_sig(TARGET_SIGILL);
#endif
sigsegv:
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
force_sigsegv(sig);
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUSPARCState *env)
{
fprintf(stderr, "setup_rt_frame: not implemented\n");
}
long do_sigreturn(CPUSPARCState *env)
{
abi_ulong sf_addr;
struct target_signal_frame *sf;
uint32_t up_psr, pc, npc;
target_sigset_t set;
sigset_t host_set;
int err=0, i;
sf_addr = env->regwptr[UREG_FP];
trace_user_do_sigreturn(env, sf_addr);
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
goto segv_and_exit;
}
/* 1. Make sure we are not getting garbage from the user */
if (sf_addr & 3)
goto segv_and_exit;
__get_user(pc, &sf->info.si_regs.pc);
__get_user(npc, &sf->info.si_regs.npc);
if ((pc | npc) & 3) {
goto segv_and_exit;
}
/* 2. Restore the state */
__get_user(up_psr, &sf->info.si_regs.psr);
/* User can only change condition codes and FPU enabling in %psr. */
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
env->pc = pc;
env->npc = npc;
__get_user(env->y, &sf->info.si_regs.y);
for (i=0; i < 8; i++) {
__get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
}
for (i=0; i < 8; i++) {
__get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
}
/* FIXME: implement FPU save/restore:
* __get_user(fpu_save, &sf->fpu_save);
* if (fpu_save)
* err |= restore_fpu_state(env, fpu_save);
*/
/* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways.
*/
__get_user(set.sig[0], &sf->info.si_mask);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
__get_user(set.sig[i], &sf->extramask[i - 1]);
}
target_to_host_sigset_internal(&host_set, &set);
set_sigmask(&host_set);
if (err) {
goto segv_and_exit;
}
unlock_user_struct(sf, sf_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
segv_and_exit:
unlock_user_struct(sf, sf_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
long do_rt_sigreturn(CPUSPARCState *env)
{
trace_user_do_rt_sigreturn(env, 0);
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
#define SPARC_MC_TSTATE 0
#define SPARC_MC_PC 1
#define SPARC_MC_NPC 2
#define SPARC_MC_Y 3
#define SPARC_MC_G1 4
#define SPARC_MC_G2 5
#define SPARC_MC_G3 6
#define SPARC_MC_G4 7
#define SPARC_MC_G5 8
#define SPARC_MC_G6 9
#define SPARC_MC_G7 10
#define SPARC_MC_O0 11
#define SPARC_MC_O1 12
#define SPARC_MC_O2 13
#define SPARC_MC_O3 14
#define SPARC_MC_O4 15
#define SPARC_MC_O5 16
#define SPARC_MC_O6 17
#define SPARC_MC_O7 18
#define SPARC_MC_NGREG 19
typedef abi_ulong target_mc_greg_t;
typedef target_mc_greg_t target_mc_gregset_t[SPARC_MC_NGREG];
struct target_mc_fq {
abi_ulong *mcfq_addr;
uint32_t mcfq_insn;
};
struct target_mc_fpu {
union {
uint32_t sregs[32];
uint64_t dregs[32];
//uint128_t qregs[16];
} mcfpu_fregs;
abi_ulong mcfpu_fsr;
abi_ulong mcfpu_fprs;
abi_ulong mcfpu_gsr;
struct target_mc_fq *mcfpu_fq;
unsigned char mcfpu_qcnt;
unsigned char mcfpu_qentsz;
unsigned char mcfpu_enab;
};
typedef struct target_mc_fpu target_mc_fpu_t;
typedef struct {
target_mc_gregset_t mc_gregs;
target_mc_greg_t mc_fp;
target_mc_greg_t mc_i7;
target_mc_fpu_t mc_fpregs;
} target_mcontext_t;
struct target_ucontext {
struct target_ucontext *tuc_link;
abi_ulong tuc_flags;
target_sigset_t tuc_sigmask;
target_mcontext_t tuc_mcontext;
};
/* A V9 register window */
struct target_reg_window {
abi_ulong locals[8];
abi_ulong ins[8];
};
#define TARGET_STACK_BIAS 2047
/* {set, get}context() needed for 64-bit SparcLinux userland. */
void sparc64_set_context(CPUSPARCState *env)
{
abi_ulong ucp_addr;
struct target_ucontext *ucp;
target_mc_gregset_t *grp;
abi_ulong pc, npc, tstate;
abi_ulong fp, i7, w_addr;
unsigned int i;
ucp_addr = env->regwptr[UREG_I0];
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) {
goto do_sigsegv;
}
grp = &ucp->tuc_mcontext.mc_gregs;
__get_user(pc, &((*grp)[SPARC_MC_PC]));
__get_user(npc, &((*grp)[SPARC_MC_NPC]));
if ((pc | npc) & 3) {
goto do_sigsegv;
}
if (env->regwptr[UREG_I1]) {
target_sigset_t target_set;
sigset_t set;
if (TARGET_NSIG_WORDS == 1) {
__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
} else {
abi_ulong *src, *dst;
src = ucp->tuc_sigmask.sig;
dst = target_set.sig;
for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
__get_user(*dst, src);
}
}
target_to_host_sigset_internal(&set, &target_set);
set_sigmask(&set);
}
env->pc = pc;
env->npc = npc;
__get_user(env->y, &((*grp)[SPARC_MC_Y]));
__get_user(tstate, &((*grp)[SPARC_MC_TSTATE]));
env->asi = (tstate >> 24) & 0xff;
cpu_put_ccr(env, tstate >> 32);
cpu_put_cwp64(env, tstate & 0x1f);
__get_user(env->gregs[1], (&(*grp)[SPARC_MC_G1]));
__get_user(env->gregs[2], (&(*grp)[SPARC_MC_G2]));
__get_user(env->gregs[3], (&(*grp)[SPARC_MC_G3]));
__get_user(env->gregs[4], (&(*grp)[SPARC_MC_G4]));
__get_user(env->gregs[5], (&(*grp)[SPARC_MC_G5]));
__get_user(env->gregs[6], (&(*grp)[SPARC_MC_G6]));
__get_user(env->gregs[7], (&(*grp)[SPARC_MC_G7]));
__get_user(env->regwptr[UREG_I0], (&(*grp)[SPARC_MC_O0]));
__get_user(env->regwptr[UREG_I1], (&(*grp)[SPARC_MC_O1]));
__get_user(env->regwptr[UREG_I2], (&(*grp)[SPARC_MC_O2]));
__get_user(env->regwptr[UREG_I3], (&(*grp)[SPARC_MC_O3]));
__get_user(env->regwptr[UREG_I4], (&(*grp)[SPARC_MC_O4]));
__get_user(env->regwptr[UREG_I5], (&(*grp)[SPARC_MC_O5]));
__get_user(env->regwptr[UREG_I6], (&(*grp)[SPARC_MC_O6]));
__get_user(env->regwptr[UREG_I7], (&(*grp)[SPARC_MC_O7]));
__get_user(fp, &(ucp->tuc_mcontext.mc_fp));
__get_user(i7, &(ucp->tuc_mcontext.mc_i7));
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
abi_ulong) != 0) {
goto do_sigsegv;
}
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
abi_ulong) != 0) {
goto do_sigsegv;
}
/* FIXME this does not match how the kernel handles the FPU in
* its sparc64_set_context implementation. In particular the FPU
* is only restored if fenab is non-zero in:
* __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
*/
__get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
{
uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
for (i = 0; i < 64; i++, src++) {
if (i & 1) {
__get_user(env->fpr[i/2].l.lower, src);
} else {
__get_user(env->fpr[i/2].l.upper, src);
}
}
}
__get_user(env->fsr,
&(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
__get_user(env->gsr,
&(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
unlock_user_struct(ucp, ucp_addr, 0);
return;
do_sigsegv:
unlock_user_struct(ucp, ucp_addr, 0);
force_sig(TARGET_SIGSEGV);
}
void sparc64_get_context(CPUSPARCState *env)
{
abi_ulong ucp_addr;
struct target_ucontext *ucp;
target_mc_gregset_t *grp;
target_mcontext_t *mcp;
abi_ulong fp, i7, w_addr;
int err;
unsigned int i;
target_sigset_t target_set;
sigset_t set;
ucp_addr = env->regwptr[UREG_I0];
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) {
goto do_sigsegv;
}
mcp = &ucp->tuc_mcontext;
grp = &mcp->mc_gregs;
/* Skip over the trap instruction, first. */
env->pc = env->npc;
env->npc += 4;
/* If we're only reading the signal mask then do_sigprocmask()
* is guaranteed not to fail, which is important because we don't
* have any way to signal a failure or restart this operation since
* this is not a normal syscall.
*/
err = do_sigprocmask(0, NULL, &set);
assert(err == 0);
host_to_target_sigset_internal(&target_set, &set);
if (TARGET_NSIG_WORDS == 1) {
__put_user(target_set.sig[0],
(abi_ulong *)&ucp->tuc_sigmask);
} else {
abi_ulong *src, *dst;
src = target_set.sig;
dst = ucp->tuc_sigmask.sig;
for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
__put_user(*src, dst);
}
if (err)
goto do_sigsegv;
}
/* XXX: tstate must be saved properly */
// __put_user(env->tstate, &((*grp)[SPARC_MC_TSTATE]));
__put_user(env->pc, &((*grp)[SPARC_MC_PC]));
__put_user(env->npc, &((*grp)[SPARC_MC_NPC]));
__put_user(env->y, &((*grp)[SPARC_MC_Y]));
__put_user(env->gregs[1], &((*grp)[SPARC_MC_G1]));
__put_user(env->gregs[2], &((*grp)[SPARC_MC_G2]));
__put_user(env->gregs[3], &((*grp)[SPARC_MC_G3]));
__put_user(env->gregs[4], &((*grp)[SPARC_MC_G4]));
__put_user(env->gregs[5], &((*grp)[SPARC_MC_G5]));
__put_user(env->gregs[6], &((*grp)[SPARC_MC_G6]));
__put_user(env->gregs[7], &((*grp)[SPARC_MC_G7]));
__put_user(env->regwptr[UREG_I0], &((*grp)[SPARC_MC_O0]));
__put_user(env->regwptr[UREG_I1], &((*grp)[SPARC_MC_O1]));
__put_user(env->regwptr[UREG_I2], &((*grp)[SPARC_MC_O2]));
__put_user(env->regwptr[UREG_I3], &((*grp)[SPARC_MC_O3]));
__put_user(env->regwptr[UREG_I4], &((*grp)[SPARC_MC_O4]));
__put_user(env->regwptr[UREG_I5], &((*grp)[SPARC_MC_O5]));
__put_user(env->regwptr[UREG_I6], &((*grp)[SPARC_MC_O6]));
__put_user(env->regwptr[UREG_I7], &((*grp)[SPARC_MC_O7]));
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
fp = i7 = 0;
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
abi_ulong) != 0) {
goto do_sigsegv;
}
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
abi_ulong) != 0) {
goto do_sigsegv;
}
__put_user(fp, &(mcp->mc_fp));
__put_user(i7, &(mcp->mc_i7));
{
uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
for (i = 0; i < 64; i++, dst++) {
if (i & 1) {
__put_user(env->fpr[i/2].l.lower, dst);
} else {
__put_user(env->fpr[i/2].l.upper, dst);
}
}
}
__put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
__put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
__put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
if (err)
goto do_sigsegv;
unlock_user_struct(ucp, ucp_addr, 1);
return;
do_sigsegv:
unlock_user_struct(ucp, ucp_addr, 1);
force_sig(TARGET_SIGSEGV);
}
#endif

2
linux-user/sparc/target_signal.h
View file

@ -33,5 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state)
return state->regwptr[UREG_FP];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* SPARC_TARGET_SIGNAL_H */

20
linux-user/sparc64/cpu_loop.c Normal file
View file

@ -0,0 +1,20 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "../sparc/cpu_loop.c"

20
linux-user/sparc64/signal.c Normal file
View file

@ -0,0 +1,20 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define SPARC_TARGET_SIGNAL_H /* to only include sparc64/target_signal.h */
#include "../sparc/signal.c"

2
linux-user/sparc64/target_signal.h
View file

@ -33,5 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state)
return state->regwptr[UREG_FP];
}
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif /* SPARC64_TARGET_SIGNAL_H */

18
linux-user/syscall.c
View file

@ -259,10 +259,22 @@ static int gettid(void) {
return -ENOSYS;
}
#endif
#if defined(TARGET_NR_getdents) && defined(__NR_getdents)
/* For the 64-bit guest on 32-bit host case we must emulate
* getdents using getdents64, because otherwise the host
* might hand us back more dirent records than we can fit
* into the guest buffer after structure format conversion.
* Otherwise we emulate getdents with getdents if the host has it.
*/
#if defined(__NR_getdents) && HOST_LONG_BITS >= TARGET_ABI_BITS
#define EMULATE_GETDENTS_WITH_GETDENTS
#endif
#if defined(TARGET_NR_getdents) && defined(EMULATE_GETDENTS_WITH_GETDENTS)
_syscall3(int, sys_getdents, uint, fd, struct linux_dirent *, dirp, uint, count);
#endif
#if !defined(__NR_getdents) || \
#if (defined(TARGET_NR_getdents) && \
!defined(EMULATE_GETDENTS_WITH_GETDENTS)) || \
(defined(TARGET_NR_getdents64) && defined(__NR_getdents64))
_syscall3(int, sys_getdents64, uint, fd, struct linux_dirent64 *, dirp, uint, count);
#endif
@ -10163,7 +10175,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_getdents
case TARGET_NR_getdents:
#ifdef __NR_getdents
#ifdef EMULATE_GETDENTS_WITH_GETDENTS
#if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64
{
struct target_dirent *target_dirp;

286
linux-user/tilegx/cpu_loop.c Normal file
View file

@ -0,0 +1,286 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
static void gen_sigill_reg(CPUTLGState *env)
{
target_siginfo_t info;
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_PRVREG;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
static void do_signal(CPUTLGState *env, int signo, int sigcode)
{
target_siginfo_t info;
info.si_signo = signo;
info.si_errno = 0;
info._sifields._sigfault._addr = env->pc;
if (signo == TARGET_SIGSEGV) {
/* The passed in sigcode is a dummy; check for a page mapping
and pass either MAPERR or ACCERR. */
target_ulong addr = env->excaddr;
info._sifields._sigfault._addr = addr;
if (page_check_range(addr, 1, PAGE_VALID) < 0) {
sigcode = TARGET_SEGV_MAPERR;
} else {
sigcode = TARGET_SEGV_ACCERR;
}
}
info.si_code = sigcode;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
static void gen_sigsegv_maperr(CPUTLGState *env, target_ulong addr)
{
env->excaddr = addr;
do_signal(env, TARGET_SIGSEGV, 0);
}
static void set_regval(CPUTLGState *env, uint8_t reg, uint64_t val)
{
if (unlikely(reg >= TILEGX_R_COUNT)) {
switch (reg) {
case TILEGX_R_SN:
case TILEGX_R_ZERO:
return;
case TILEGX_R_IDN0:
case TILEGX_R_IDN1:
case TILEGX_R_UDN0:
case TILEGX_R_UDN1:
case TILEGX_R_UDN2:
case TILEGX_R_UDN3:
gen_sigill_reg(env);
return;
default:
g_assert_not_reached();
}
}
env->regs[reg] = val;
}
/*
* Compare the 8-byte contents of the CmpValue SPR with the 8-byte value in
* memory at the address held in the first source register. If the values are
* not equal, then no memory operation is performed. If the values are equal,
* the 8-byte quantity from the second source register is written into memory
* at the address held in the first source register. In either case, the result
* of the instruction is the value read from memory. The compare and write to
* memory are atomic and thus can be used for synchronization purposes. This
* instruction only operates for addresses aligned to a 8-byte boundary.
* Unaligned memory access causes an Unaligned Data Reference interrupt.
*
* Functional Description (64-bit)
* uint64_t memVal = memoryReadDoubleWord (rf[SrcA]);
* rf[Dest] = memVal;
* if (memVal == SPR[CmpValueSPR])
* memoryWriteDoubleWord (rf[SrcA], rf[SrcB]);
*
* Functional Description (32-bit)
* uint64_t memVal = signExtend32 (memoryReadWord (rf[SrcA]));
* rf[Dest] = memVal;
* if (memVal == signExtend32 (SPR[CmpValueSPR]))
* memoryWriteWord (rf[SrcA], rf[SrcB]);
*
*
* This function also processes exch and exch4 which need not process SPR.
*/
static void do_exch(CPUTLGState *env, bool quad, bool cmp)
{
target_ulong addr;
target_long val, sprval;
start_exclusive();
addr = env->atomic_srca;
if (quad ? get_user_s64(val, addr) : get_user_s32(val, addr)) {
goto sigsegv_maperr;
}
if (cmp) {
if (quad) {
sprval = env->spregs[TILEGX_SPR_CMPEXCH];
} else {
sprval = sextract64(env->spregs[TILEGX_SPR_CMPEXCH], 0, 32);
}
}
if (!cmp || val == sprval) {
target_long valb = env->atomic_srcb;
if (quad ? put_user_u64(valb, addr) : put_user_u32(valb, addr)) {
goto sigsegv_maperr;
}
}
set_regval(env, env->atomic_dstr, val);
end_exclusive();
return;
sigsegv_maperr:
end_exclusive();
gen_sigsegv_maperr(env, addr);
}
static void do_fetch(CPUTLGState *env, int trapnr, bool quad)
{
int8_t write = 1;
target_ulong addr;
target_long val, valb;
start_exclusive();
addr = env->atomic_srca;
valb = env->atomic_srcb;
if (quad ? get_user_s64(val, addr) : get_user_s32(val, addr)) {
goto sigsegv_maperr;
}
switch (trapnr) {
case TILEGX_EXCP_OPCODE_FETCHADD:
case TILEGX_EXCP_OPCODE_FETCHADD4:
valb += val;
break;
case TILEGX_EXCP_OPCODE_FETCHADDGEZ:
valb += val;
if (valb < 0) {
write = 0;
}
break;
case TILEGX_EXCP_OPCODE_FETCHADDGEZ4:
valb += val;
if ((int32_t)valb < 0) {
write = 0;
}
break;
case TILEGX_EXCP_OPCODE_FETCHAND:
case TILEGX_EXCP_OPCODE_FETCHAND4:
valb &= val;
break;
case TILEGX_EXCP_OPCODE_FETCHOR:
case TILEGX_EXCP_OPCODE_FETCHOR4:
valb |= val;
break;
default:
g_assert_not_reached();
}
if (write) {
if (quad ? put_user_u64(valb, addr) : put_user_u32(valb, addr)) {
goto sigsegv_maperr;
}
}
set_regval(env, env->atomic_dstr, val);
end_exclusive();
return;
sigsegv_maperr:
end_exclusive();
gen_sigsegv_maperr(env, addr);
}
void cpu_loop(CPUTLGState *env)
{
CPUState *cs = CPU(tilegx_env_get_cpu(env));
int trapnr;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case TILEGX_EXCP_SYSCALL:
{
abi_ulong ret = do_syscall(env, env->regs[TILEGX_R_NR],
env->regs[0], env->regs[1],
env->regs[2], env->regs[3],
env->regs[4], env->regs[5],
env->regs[6], env->regs[7]);
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 8;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->regs[TILEGX_R_RE] = ret;
env->regs[TILEGX_R_ERR] = TILEGX_IS_ERRNO(ret) ? -ret : 0;
}
break;
}
case TILEGX_EXCP_OPCODE_EXCH:
do_exch(env, true, false);
break;
case TILEGX_EXCP_OPCODE_EXCH4:
do_exch(env, false, false);
break;
case TILEGX_EXCP_OPCODE_CMPEXCH:
do_exch(env, true, true);
break;
case TILEGX_EXCP_OPCODE_CMPEXCH4:
do_exch(env, false, true);
break;
case TILEGX_EXCP_OPCODE_FETCHADD:
case TILEGX_EXCP_OPCODE_FETCHADDGEZ:
case TILEGX_EXCP_OPCODE_FETCHAND:
case TILEGX_EXCP_OPCODE_FETCHOR:
do_fetch(env, trapnr, true);
break;
case TILEGX_EXCP_OPCODE_FETCHADD4:
case TILEGX_EXCP_OPCODE_FETCHADDGEZ4:
case TILEGX_EXCP_OPCODE_FETCHAND4:
case TILEGX_EXCP_OPCODE_FETCHOR4:
do_fetch(env, trapnr, false);
break;
case TILEGX_EXCP_SIGNAL:
do_signal(env, env->signo, env->sigcode);
break;
case TILEGX_EXCP_REG_IDN_ACCESS:
case TILEGX_EXCP_REG_UDN_ACCESS:
gen_sigill_reg(env);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
fprintf(stderr, "trapnr is %d[0x%x].\n", trapnr, trapnr);
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < TILEGX_R_COUNT; i++) {
env->regs[i] = regs->regs[i];
}
for (i = 0; i < TILEGX_SPR_COUNT; i++) {
env->spregs[i] = 0;
}
env->pc = regs->pc;
}

186
linux-user/tilegx/signal.c Normal file
View file

@ -0,0 +1,186 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
union {
/* General-purpose registers. */
abi_ulong gregs[56];
struct {
abi_ulong __gregs[53];
abi_ulong tp; /* Aliases gregs[TREG_TP]. */
abi_ulong sp; /* Aliases gregs[TREG_SP]. */
abi_ulong lr; /* Aliases gregs[TREG_LR]. */
};
};
abi_ulong pc; /* Program counter. */
abi_ulong ics; /* In Interrupt Critical Section? */
abi_ulong faultnum; /* Fault number. */
abi_ulong pad[5];
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_rt_sigframe {
unsigned char save_area[16]; /* caller save area */
struct target_siginfo info;
struct target_ucontext uc;
abi_ulong retcode[2];
};
#define INSN_MOVELI_R10_139 0x00045fe551483000ULL /* { moveli r10, 139 } */
#define INSN_SWINT1 0x286b180051485000ULL /* { swint1 } */
static void setup_sigcontext(struct target_sigcontext *sc,
CPUArchState *env, int signo)
{
int i;
for (i = 0; i < TILEGX_R_COUNT; ++i) {
__put_user(env->regs[i], &sc->gregs[i]);
}
__put_user(env->pc, &sc->pc);
__put_user(0, &sc->ics);
__put_user(signo, &sc->faultnum);
}
static void restore_sigcontext(CPUTLGState *env, struct target_sigcontext *sc)
{
int i;
for (i = 0; i < TILEGX_R_COUNT; ++i) {
__get_user(env->regs[i], &sc->gregs[i]);
}
__get_user(env->pc, &sc->pc);
}
static abi_ulong get_sigframe(struct target_sigaction *ka, CPUArchState *env,
size_t frame_size)
{
unsigned long sp = env->regs[TILEGX_R_SP];
if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size))) {
return -1UL;
}
if ((ka->sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp -= frame_size;
sp &= -16UL;
return sp;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUArchState *env)
{
abi_ulong frame_addr;
struct target_rt_sigframe *frame;
unsigned long restorer;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
/* Always write at least the signal number for the stack backtracer. */
if (ka->sa_flags & TARGET_SA_SIGINFO) {
/* At sigreturn time, restore the callee-save registers too. */
tswap_siginfo(&frame->info, info);
/* regs->flags |= PT_FLAGS_RESTORE_REGS; FIXME: we can skip it? */
} else {
__put_user(info->si_signo, &frame->info.si_signo);
}
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->regs[TILEGX_R_SP]),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
setup_sigcontext(&frame->uc.tuc_mcontext, env, info->si_signo);
if (ka->sa_flags & TARGET_SA_RESTORER) {
restorer = (unsigned long) ka->sa_restorer;
} else {
__put_user(INSN_MOVELI_R10_139, &frame->retcode[0]);
__put_user(INSN_SWINT1, &frame->retcode[1]);
restorer = frame_addr + offsetof(struct target_rt_sigframe, retcode);
}
env->pc = (unsigned long) ka->_sa_handler;
env->regs[TILEGX_R_SP] = (unsigned long) frame;
env->regs[TILEGX_R_LR] = restorer;
env->regs[0] = (unsigned long) sig;
env->regs[1] = (unsigned long) &frame->info;
env->regs[2] = (unsigned long) &frame->uc;
/* regs->flags |= PT_FLAGS_CALLER_SAVES; FIXME: we can skip it? */
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
}
long do_rt_sigreturn(CPUTLGState *env)
{
abi_ulong frame_addr = env->regs[TILEGX_R_SP];
struct target_rt_sigframe *frame;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(env, &frame->uc.tuc_mcontext);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.tuc_stack),
0, env->regs[TILEGX_R_SP]) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

2
linux-user/tilegx/target_signal.h
View file

@ -24,6 +24,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUTLGState *state)
{
return state->regs[TILEGX_R_SP];
}
#endif /* TILEGX_TARGET_SIGNAL_H */

20
linux-user/x86_64/cpu_loop.c Normal file
View file

@ -0,0 +1,20 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "../i386/cpu_loop.c"

20
linux-user/x86_64/signal.c Normal file
View file

@ -0,0 +1,20 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define I386_TARGET_SIGNAL_H /* to only include x86_64/target_signal.h */
#include "../i386/signal.c"

1
linux-user/x86_64/target_signal.h
View file

@ -25,5 +25,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUX86State *state)
{
return state->regs[R_ESP];
}
#endif /* X86_64_TARGET_SIGNAL_H */

267
linux-user/xtensa/cpu_loop.c Normal file
View file

@ -0,0 +1,267 @@
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "cpu_loop-common.h"
static void xtensa_rfw(CPUXtensaState *env)
{
xtensa_restore_owb(env);
env->pc = env->sregs[EPC1];
}
static void xtensa_rfwu(CPUXtensaState *env)
{
env->sregs[WINDOW_START] |= (1 << env->sregs[WINDOW_BASE]);
xtensa_rfw(env);
}
static void xtensa_rfwo(CPUXtensaState *env)
{
env->sregs[WINDOW_START] &= ~(1 << env->sregs[WINDOW_BASE]);
xtensa_rfw(env);
}
static void xtensa_overflow4(CPUXtensaState *env)
{
put_user_ual(env->regs[0], env->regs[5] - 16);
put_user_ual(env->regs[1], env->regs[5] - 12);
put_user_ual(env->regs[2], env->regs[5] - 8);
put_user_ual(env->regs[3], env->regs[5] - 4);
xtensa_rfwo(env);
}
static void xtensa_underflow4(CPUXtensaState *env)
{
get_user_ual(env->regs[0], env->regs[5] - 16);
get_user_ual(env->regs[1], env->regs[5] - 12);
get_user_ual(env->regs[2], env->regs[5] - 8);
get_user_ual(env->regs[3], env->regs[5] - 4);
xtensa_rfwu(env);
}
static void xtensa_overflow8(CPUXtensaState *env)
{
put_user_ual(env->regs[0], env->regs[9] - 16);
get_user_ual(env->regs[0], env->regs[1] - 12);
put_user_ual(env->regs[1], env->regs[9] - 12);
put_user_ual(env->regs[2], env->regs[9] - 8);
put_user_ual(env->regs[3], env->regs[9] - 4);
put_user_ual(env->regs[4], env->regs[0] - 32);
put_user_ual(env->regs[5], env->regs[0] - 28);
put_user_ual(env->regs[6], env->regs[0] - 24);
put_user_ual(env->regs[7], env->regs[0] - 20);
xtensa_rfwo(env);
}
static void xtensa_underflow8(CPUXtensaState *env)
{
get_user_ual(env->regs[0], env->regs[9] - 16);
get_user_ual(env->regs[1], env->regs[9] - 12);
get_user_ual(env->regs[2], env->regs[9] - 8);
get_user_ual(env->regs[7], env->regs[1] - 12);
get_user_ual(env->regs[3], env->regs[9] - 4);
get_user_ual(env->regs[4], env->regs[7] - 32);
get_user_ual(env->regs[5], env->regs[7] - 28);
get_user_ual(env->regs[6], env->regs[7] - 24);
get_user_ual(env->regs[7], env->regs[7] - 20);
xtensa_rfwu(env);
}
static void xtensa_overflow12(CPUXtensaState *env)
{
put_user_ual(env->regs[0], env->regs[13] - 16);
get_user_ual(env->regs[0], env->regs[1] - 12);
put_user_ual(env->regs[1], env->regs[13] - 12);
put_user_ual(env->regs[2], env->regs[13] - 8);
put_user_ual(env->regs[3], env->regs[13] - 4);
put_user_ual(env->regs[4], env->regs[0] - 48);
put_user_ual(env->regs[5], env->regs[0] - 44);
put_user_ual(env->regs[6], env->regs[0] - 40);
put_user_ual(env->regs[7], env->regs[0] - 36);
put_user_ual(env->regs[8], env->regs[0] - 32);
put_user_ual(env->regs[9], env->regs[0] - 28);
put_user_ual(env->regs[10], env->regs[0] - 24);
put_user_ual(env->regs[11], env->regs[0] - 20);
xtensa_rfwo(env);
}
static void xtensa_underflow12(CPUXtensaState *env)
{
get_user_ual(env->regs[0], env->regs[13] - 16);
get_user_ual(env->regs[1], env->regs[13] - 12);
get_user_ual(env->regs[2], env->regs[13] - 8);
get_user_ual(env->regs[11], env->regs[1] - 12);
get_user_ual(env->regs[3], env->regs[13] - 4);
get_user_ual(env->regs[4], env->regs[11] - 48);
get_user_ual(env->regs[5], env->regs[11] - 44);
get_user_ual(env->regs[6], env->regs[11] - 40);
get_user_ual(env->regs[7], env->regs[11] - 36);
get_user_ual(env->regs[8], env->regs[11] - 32);
get_user_ual(env->regs[9], env->regs[11] - 28);
get_user_ual(env->regs[10], env->regs[11] - 24);
get_user_ual(env->regs[11], env->regs[11] - 20);
xtensa_rfwu(env);
}
void cpu_loop(CPUXtensaState *env)
{
CPUState *cs = CPU(xtensa_env_get_cpu(env));
target_siginfo_t info;
abi_ulong ret;
int trapnr;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
env->sregs[PS] &= ~PS_EXCM;
switch (trapnr) {
case EXCP_INTERRUPT:
break;
case EXC_WINDOW_OVERFLOW4:
xtensa_overflow4(env);
break;
case EXC_WINDOW_UNDERFLOW4:
xtensa_underflow4(env);
break;
case EXC_WINDOW_OVERFLOW8:
xtensa_overflow8(env);
break;
case EXC_WINDOW_UNDERFLOW8:
xtensa_underflow8(env);
break;
case EXC_WINDOW_OVERFLOW12:
xtensa_overflow12(env);
break;
case EXC_WINDOW_UNDERFLOW12:
xtensa_underflow12(env);
break;
case EXC_USER:
switch (env->sregs[EXCCAUSE]) {
case ILLEGAL_INSTRUCTION_CAUSE:
case PRIVILEGED_CAUSE:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code =
env->sregs[EXCCAUSE] == ILLEGAL_INSTRUCTION_CAUSE ?
TARGET_ILL_ILLOPC : TARGET_ILL_PRVOPC;
info._sifields._sigfault._addr = env->sregs[EPC1];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case SYSCALL_CAUSE:
env->pc += 3;
ret = do_syscall(env, env->regs[2],
env->regs[6], env->regs[3],
env->regs[4], env->regs[5],
env->regs[8], env->regs[9], 0, 0);
switch (ret) {
default:
env->regs[2] = ret;
break;
case -TARGET_ERESTARTSYS:
env->pc -= 3;
break;
case -TARGET_QEMU_ESIGRETURN:
break;
}
break;
case ALLOCA_CAUSE:
env->sregs[PS] = deposit32(env->sregs[PS],
PS_OWB_SHIFT,
PS_OWB_LEN,
env->sregs[WINDOW_BASE]);
switch (env->regs[0] & 0xc0000000) {
case 0x00000000:
case 0x40000000:
xtensa_rotate_window(env, -1);
xtensa_underflow4(env);
break;
case 0x80000000:
xtensa_rotate_window(env, -2);
xtensa_underflow8(env);
break;
case 0xc0000000:
xtensa_rotate_window(env, -3);
xtensa_underflow12(env);
break;
}
break;
case INTEGER_DIVIDE_BY_ZERO_CAUSE:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTDIV;
info._sifields._sigfault._addr = env->sregs[EPC1];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case LOAD_PROHIBITED_CAUSE:
case STORE_PROHIBITED_CAUSE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
info._sifields._sigfault._addr = env->sregs[EXCVADDR];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
default:
fprintf(stderr, "exccause = %d\n", env->sregs[EXCCAUSE]);
g_assert_not_reached();
}
break;
case EXCP_DEBUG:
trapnr = gdb_handlesig(cs, TARGET_SIGTRAP);
if (trapnr) {
info.si_signo = trapnr;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, trapnr, QEMU_SI_FAULT, &info);
}
break;
case EXC_DEBUG:
default:
fprintf(stderr, "trapnr = %d\n", trapnr);
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < 16; ++i) {
env->regs[i] = regs->areg[i];
}
env->sregs[WINDOW_START] = regs->windowstart;
env->pc = regs->pc;
}

268
linux-user/xtensa/signal.c Normal file
View file

@ -0,0 +1,268 @@
/*
* Emulation of Linux signals
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu.h"
#include "target_signal.h"
#include "signal-common.h"
#include "linux-user/trace.h"
struct target_sigcontext {
abi_ulong sc_pc;
abi_ulong sc_ps;
abi_ulong sc_lbeg;
abi_ulong sc_lend;
abi_ulong sc_lcount;
abi_ulong sc_sar;
abi_ulong sc_acclo;
abi_ulong sc_acchi;
abi_ulong sc_a[16];
abi_ulong sc_xtregs;
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask;
};
struct target_rt_sigframe {
target_siginfo_t info;
struct target_ucontext uc;
/* TODO: xtregs */
uint8_t retcode[6];
abi_ulong window[4];
};
static abi_ulong get_sigframe(struct target_sigaction *sa,
CPUXtensaState *env,
unsigned long framesize)
{
abi_ulong sp = env->regs[1];
/* This is the X/Open sanctioned signal stack switching. */
if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
return (sp - framesize) & -16;
}
static int flush_window_regs(CPUXtensaState *env)
{
uint32_t wb = env->sregs[WINDOW_BASE];
uint32_t ws = xtensa_replicate_windowstart(env) >> (wb + 1);
unsigned d = ctz32(ws) + 1;
unsigned i;
int ret = 0;
for (i = d; i < env->config->nareg / 4; i += d) {
uint32_t ssp, osp;
unsigned j;
ws >>= d;
xtensa_rotate_window(env, d);
if (ws & 0x1) {
ssp = env->regs[5];
d = 1;
} else if (ws & 0x2) {
ssp = env->regs[9];
ret |= get_user_ual(osp, env->regs[1] - 12);
osp -= 32;
d = 2;
} else if (ws & 0x4) {
ssp = env->regs[13];
ret |= get_user_ual(osp, env->regs[1] - 12);
osp -= 48;
d = 3;
} else {
g_assert_not_reached();
}
for (j = 0; j < 4; ++j) {
ret |= put_user_ual(env->regs[j], ssp - 16 + j * 4);
}
for (j = 4; j < d * 4; ++j) {
ret |= put_user_ual(env->regs[j], osp - 16 + j * 4);
}
}
xtensa_rotate_window(env, d);
g_assert(env->sregs[WINDOW_BASE] == wb);
return ret == 0;
}
static int setup_sigcontext(struct target_rt_sigframe *frame,
CPUXtensaState *env)
{
struct target_sigcontext *sc = &frame->uc.tuc_mcontext;
int i;
__put_user(env->pc, &sc->sc_pc);
__put_user(env->sregs[PS], &sc->sc_ps);
__put_user(env->sregs[LBEG], &sc->sc_lbeg);
__put_user(env->sregs[LEND], &sc->sc_lend);
__put_user(env->sregs[LCOUNT], &sc->sc_lcount);
if (!flush_window_regs(env)) {
return 0;
}
for (i = 0; i < 16; ++i) {
__put_user(env->regs[i], sc->sc_a + i);
}
__put_user(0, &sc->sc_xtregs);
/* TODO: xtregs */
return 1;
}
void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUXtensaState *env)
{
abi_ulong frame_addr;
struct target_rt_sigframe *frame;
uint32_t ra;
int i;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto give_sigsegv;
}
if (ka->sa_flags & SA_SIGINFO) {
tswap_siginfo(&frame->info, info);
}
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->regs[1]),
&frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
if (!setup_sigcontext(frame, env)) {
unlock_user_struct(frame, frame_addr, 0);
goto give_sigsegv;
}
for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
if (ka->sa_flags & TARGET_SA_RESTORER) {
ra = ka->sa_restorer;
} else {
ra = frame_addr + offsetof(struct target_rt_sigframe, retcode);
#ifdef TARGET_WORDS_BIGENDIAN
/* Generate instruction: MOVI a2, __NR_rt_sigreturn */
__put_user(0x22, &frame->retcode[0]);
__put_user(0x0a, &frame->retcode[1]);
__put_user(TARGET_NR_rt_sigreturn, &frame->retcode[2]);
/* Generate instruction: SYSCALL */
__put_user(0x00, &frame->retcode[3]);
__put_user(0x05, &frame->retcode[4]);
__put_user(0x00, &frame->retcode[5]);
#else
/* Generate instruction: MOVI a2, __NR_rt_sigreturn */
__put_user(0x22, &frame->retcode[0]);
__put_user(0xa0, &frame->retcode[1]);
__put_user(TARGET_NR_rt_sigreturn, &frame->retcode[2]);
/* Generate instruction: SYSCALL */
__put_user(0x00, &frame->retcode[3]);
__put_user(0x50, &frame->retcode[4]);
__put_user(0x00, &frame->retcode[5]);
#endif
}
env->sregs[PS] = PS_UM | (3 << PS_RING_SHIFT);
if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER)) {
env->sregs[PS] |= PS_WOE | (1 << PS_CALLINC_SHIFT);
}
memset(env->regs, 0, sizeof(env->regs));
env->pc = ka->_sa_handler;
env->regs[1] = frame_addr;
env->sregs[WINDOW_BASE] = 0;
env->sregs[WINDOW_START] = 1;
env->regs[4] = (ra & 0x3fffffff) | 0x40000000;
env->regs[6] = sig;
env->regs[7] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->regs[8] = frame_addr + offsetof(struct target_rt_sigframe, uc);
unlock_user_struct(frame, frame_addr, 1);
return;
give_sigsegv:
force_sigsegv(sig);
return;
}
static void restore_sigcontext(CPUXtensaState *env,
struct target_rt_sigframe *frame)
{
struct target_sigcontext *sc = &frame->uc.tuc_mcontext;
uint32_t ps;
int i;
__get_user(env->pc, &sc->sc_pc);
__get_user(ps, &sc->sc_ps);
__get_user(env->sregs[LBEG], &sc->sc_lbeg);
__get_user(env->sregs[LEND], &sc->sc_lend);
__get_user(env->sregs[LCOUNT], &sc->sc_lcount);
env->sregs[WINDOW_BASE] = 0;
env->sregs[WINDOW_START] = 1;
env->sregs[PS] = deposit32(env->sregs[PS],
PS_CALLINC_SHIFT,
PS_CALLINC_LEN,
extract32(ps, PS_CALLINC_SHIFT,
PS_CALLINC_LEN));
for (i = 0; i < 16; ++i) {
__get_user(env->regs[i], sc->sc_a + i);
}
/* TODO: xtregs */
}
long do_rt_sigreturn(CPUXtensaState *env)
{
abi_ulong frame_addr = env->regs[1];
struct target_rt_sigframe *frame;
sigset_t set;
trace_user_do_rt_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
restore_sigcontext(env, frame);
if (do_sigaltstack(frame_addr +
offsetof(struct target_rt_sigframe, uc.tuc_stack),
0, get_sp_from_cpustate(env)) == -TARGET_EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}

1
linux-user/xtensa/target_signal.h
View file

@ -24,5 +24,4 @@ static inline abi_ulong get_sp_from_cpustate(CPUXtensaState *state)
{
return state->regs[1];
}
#endif