2021-02-08 06:46:20 +01:00
|
|
|
/*
|
|
|
|
* Emulation of Linux signals
|
|
|
|
*
|
|
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
|
|
* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
|
|
|
|
*
|
|
|
|
* 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"
|
2021-09-08 17:44:03 +02:00
|
|
|
#include "user-internals.h"
|
2021-02-08 06:46:20 +01:00
|
|
|
#include "signal-common.h"
|
|
|
|
#include "linux-user/trace.h"
|
|
|
|
|
|
|
|
struct target_sigcontext {
|
|
|
|
target_ulong r0, r1, r2, r3;
|
|
|
|
target_ulong r4, r5, r6, r7;
|
|
|
|
target_ulong r8, r9, r10, r11;
|
|
|
|
target_ulong r12, r13, r14, r15;
|
|
|
|
target_ulong r16, r17, r18, r19;
|
|
|
|
target_ulong r20, r21, r22, r23;
|
|
|
|
target_ulong r24, r25, r26, r27;
|
|
|
|
target_ulong r28, r29, r30, r31;
|
|
|
|
target_ulong sa0;
|
|
|
|
target_ulong lc0;
|
|
|
|
target_ulong sa1;
|
|
|
|
target_ulong lc1;
|
|
|
|
target_ulong m0;
|
|
|
|
target_ulong m1;
|
|
|
|
target_ulong usr;
|
|
|
|
target_ulong p3_0;
|
|
|
|
target_ulong gp;
|
|
|
|
target_ulong ugp;
|
|
|
|
target_ulong pc;
|
|
|
|
target_ulong cause;
|
|
|
|
target_ulong badva;
|
|
|
|
target_ulong pad1;
|
|
|
|
target_ulong pad2;
|
|
|
|
target_ulong pad3;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct target_ucontext {
|
|
|
|
unsigned long uc_flags;
|
|
|
|
target_ulong uc_link; /* target pointer */
|
|
|
|
target_stack_t uc_stack;
|
|
|
|
struct target_sigcontext uc_mcontext;
|
|
|
|
target_sigset_t uc_sigmask;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct target_rt_sigframe {
|
|
|
|
uint32_t tramp[2];
|
|
|
|
struct target_siginfo info;
|
|
|
|
struct target_ucontext uc;
|
|
|
|
};
|
|
|
|
|
|
|
|
static abi_ulong get_sigframe(struct target_sigaction *ka,
|
|
|
|
CPUHexagonState *regs, size_t framesize)
|
|
|
|
{
|
|
|
|
abi_ulong sp = get_sp_from_cpustate(regs);
|
|
|
|
|
|
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
|
|
|
sp = target_sigsp(sp, ka) - framesize;
|
|
|
|
|
|
|
|
sp = QEMU_ALIGN_DOWN(sp, 8);
|
|
|
|
|
|
|
|
return sp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void setup_sigcontext(struct target_sigcontext *sc, CPUHexagonState *env)
|
|
|
|
{
|
|
|
|
__put_user(env->gpr[HEX_REG_R00], &sc->r0);
|
|
|
|
__put_user(env->gpr[HEX_REG_R01], &sc->r1);
|
|
|
|
__put_user(env->gpr[HEX_REG_R02], &sc->r2);
|
|
|
|
__put_user(env->gpr[HEX_REG_R03], &sc->r3);
|
|
|
|
__put_user(env->gpr[HEX_REG_R04], &sc->r4);
|
|
|
|
__put_user(env->gpr[HEX_REG_R05], &sc->r5);
|
|
|
|
__put_user(env->gpr[HEX_REG_R06], &sc->r6);
|
|
|
|
__put_user(env->gpr[HEX_REG_R07], &sc->r7);
|
|
|
|
__put_user(env->gpr[HEX_REG_R08], &sc->r8);
|
|
|
|
__put_user(env->gpr[HEX_REG_R09], &sc->r9);
|
|
|
|
__put_user(env->gpr[HEX_REG_R10], &sc->r10);
|
|
|
|
__put_user(env->gpr[HEX_REG_R11], &sc->r11);
|
|
|
|
__put_user(env->gpr[HEX_REG_R12], &sc->r12);
|
|
|
|
__put_user(env->gpr[HEX_REG_R13], &sc->r13);
|
|
|
|
__put_user(env->gpr[HEX_REG_R14], &sc->r14);
|
|
|
|
__put_user(env->gpr[HEX_REG_R15], &sc->r15);
|
|
|
|
__put_user(env->gpr[HEX_REG_R16], &sc->r16);
|
|
|
|
__put_user(env->gpr[HEX_REG_R17], &sc->r17);
|
|
|
|
__put_user(env->gpr[HEX_REG_R18], &sc->r18);
|
|
|
|
__put_user(env->gpr[HEX_REG_R19], &sc->r19);
|
|
|
|
__put_user(env->gpr[HEX_REG_R20], &sc->r20);
|
|
|
|
__put_user(env->gpr[HEX_REG_R21], &sc->r21);
|
|
|
|
__put_user(env->gpr[HEX_REG_R22], &sc->r22);
|
|
|
|
__put_user(env->gpr[HEX_REG_R23], &sc->r23);
|
|
|
|
__put_user(env->gpr[HEX_REG_R24], &sc->r24);
|
|
|
|
__put_user(env->gpr[HEX_REG_R25], &sc->r25);
|
|
|
|
__put_user(env->gpr[HEX_REG_R26], &sc->r26);
|
|
|
|
__put_user(env->gpr[HEX_REG_R27], &sc->r27);
|
|
|
|
__put_user(env->gpr[HEX_REG_R28], &sc->r28);
|
|
|
|
__put_user(env->gpr[HEX_REG_R29], &sc->r29);
|
|
|
|
__put_user(env->gpr[HEX_REG_R30], &sc->r30);
|
|
|
|
__put_user(env->gpr[HEX_REG_R31], &sc->r31);
|
|
|
|
__put_user(env->gpr[HEX_REG_SA0], &sc->sa0);
|
|
|
|
__put_user(env->gpr[HEX_REG_LC0], &sc->lc0);
|
|
|
|
__put_user(env->gpr[HEX_REG_SA1], &sc->sa1);
|
|
|
|
__put_user(env->gpr[HEX_REG_LC1], &sc->lc1);
|
|
|
|
__put_user(env->gpr[HEX_REG_M0], &sc->m0);
|
|
|
|
__put_user(env->gpr[HEX_REG_M1], &sc->m1);
|
|
|
|
__put_user(env->gpr[HEX_REG_USR], &sc->usr);
|
|
|
|
__put_user(env->gpr[HEX_REG_P3_0], &sc->p3_0);
|
|
|
|
__put_user(env->gpr[HEX_REG_GP], &sc->gp);
|
|
|
|
__put_user(env->gpr[HEX_REG_UGP], &sc->ugp);
|
|
|
|
__put_user(env->gpr[HEX_REG_PC], &sc->pc);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void setup_ucontext(struct target_ucontext *uc,
|
|
|
|
CPUHexagonState *env, target_sigset_t *set)
|
|
|
|
{
|
|
|
|
__put_user(0, &(uc->uc_flags));
|
|
|
|
__put_user(0, &(uc->uc_link));
|
|
|
|
|
|
|
|
target_save_altstack(&uc->uc_stack, env);
|
|
|
|
|
|
|
|
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(0x7800d166, tramp + 0); /* { r6=#__NR_rt_sigreturn } */
|
|
|
|
__put_user(0x5400c004, tramp + 1); /* { trap0(#1) } */
|
|
|
|
}
|
|
|
|
|
|
|
|
void setup_rt_frame(int sig, struct target_sigaction *ka,
|
|
|
|
target_siginfo_t *info,
|
|
|
|
target_sigset_t *set, CPUHexagonState *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);
|
2021-09-29 15:05:35 +02:00
|
|
|
/*
|
|
|
|
* The on-stack signal trampoline is no longer executed;
|
|
|
|
* however, the libgcc signal frame unwinding code checks
|
|
|
|
* for the presence of these two numeric magic values.
|
|
|
|
*/
|
2021-02-08 06:46:20 +01:00
|
|
|
install_sigtramp(frame->tramp);
|
|
|
|
|
|
|
|
env->gpr[HEX_REG_PC] = ka->_sa_handler;
|
|
|
|
env->gpr[HEX_REG_SP] = frame_addr;
|
|
|
|
env->gpr[HEX_REG_R00] = sig;
|
|
|
|
env->gpr[HEX_REG_R01] =
|
|
|
|
frame_addr + offsetof(struct target_rt_sigframe, info);
|
|
|
|
env->gpr[HEX_REG_R02] =
|
|
|
|
frame_addr + offsetof(struct target_rt_sigframe, uc);
|
2021-09-29 15:05:35 +02:00
|
|
|
env->gpr[HEX_REG_LR] = default_rt_sigreturn;
|
2021-02-08 06:46:20 +01:00
|
|
|
|
|
|
|
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(CPUHexagonState *env,
|
|
|
|
struct target_sigcontext *sc)
|
|
|
|
{
|
|
|
|
__get_user(env->gpr[HEX_REG_R00], &sc->r0);
|
|
|
|
__get_user(env->gpr[HEX_REG_R01], &sc->r1);
|
|
|
|
__get_user(env->gpr[HEX_REG_R02], &sc->r2);
|
|
|
|
__get_user(env->gpr[HEX_REG_R03], &sc->r3);
|
|
|
|
__get_user(env->gpr[HEX_REG_R04], &sc->r4);
|
|
|
|
__get_user(env->gpr[HEX_REG_R05], &sc->r5);
|
|
|
|
__get_user(env->gpr[HEX_REG_R06], &sc->r6);
|
|
|
|
__get_user(env->gpr[HEX_REG_R07], &sc->r7);
|
|
|
|
__get_user(env->gpr[HEX_REG_R08], &sc->r8);
|
|
|
|
__get_user(env->gpr[HEX_REG_R09], &sc->r9);
|
|
|
|
__get_user(env->gpr[HEX_REG_R10], &sc->r10);
|
|
|
|
__get_user(env->gpr[HEX_REG_R11], &sc->r11);
|
|
|
|
__get_user(env->gpr[HEX_REG_R12], &sc->r12);
|
|
|
|
__get_user(env->gpr[HEX_REG_R13], &sc->r13);
|
|
|
|
__get_user(env->gpr[HEX_REG_R14], &sc->r14);
|
|
|
|
__get_user(env->gpr[HEX_REG_R15], &sc->r15);
|
|
|
|
__get_user(env->gpr[HEX_REG_R16], &sc->r16);
|
|
|
|
__get_user(env->gpr[HEX_REG_R17], &sc->r17);
|
|
|
|
__get_user(env->gpr[HEX_REG_R18], &sc->r18);
|
|
|
|
__get_user(env->gpr[HEX_REG_R19], &sc->r19);
|
|
|
|
__get_user(env->gpr[HEX_REG_R20], &sc->r20);
|
|
|
|
__get_user(env->gpr[HEX_REG_R21], &sc->r21);
|
|
|
|
__get_user(env->gpr[HEX_REG_R22], &sc->r22);
|
|
|
|
__get_user(env->gpr[HEX_REG_R23], &sc->r23);
|
|
|
|
__get_user(env->gpr[HEX_REG_R24], &sc->r24);
|
|
|
|
__get_user(env->gpr[HEX_REG_R25], &sc->r25);
|
|
|
|
__get_user(env->gpr[HEX_REG_R26], &sc->r26);
|
|
|
|
__get_user(env->gpr[HEX_REG_R27], &sc->r27);
|
|
|
|
__get_user(env->gpr[HEX_REG_R28], &sc->r28);
|
|
|
|
__get_user(env->gpr[HEX_REG_R29], &sc->r29);
|
|
|
|
__get_user(env->gpr[HEX_REG_R30], &sc->r30);
|
|
|
|
__get_user(env->gpr[HEX_REG_R31], &sc->r31);
|
|
|
|
__get_user(env->gpr[HEX_REG_SA0], &sc->sa0);
|
|
|
|
__get_user(env->gpr[HEX_REG_LC0], &sc->lc0);
|
|
|
|
__get_user(env->gpr[HEX_REG_SA1], &sc->sa1);
|
|
|
|
__get_user(env->gpr[HEX_REG_LC1], &sc->lc1);
|
|
|
|
__get_user(env->gpr[HEX_REG_M0], &sc->m0);
|
|
|
|
__get_user(env->gpr[HEX_REG_M1], &sc->m1);
|
|
|
|
__get_user(env->gpr[HEX_REG_USR], &sc->usr);
|
|
|
|
__get_user(env->gpr[HEX_REG_P3_0], &sc->p3_0);
|
|
|
|
__get_user(env->gpr[HEX_REG_GP], &sc->gp);
|
|
|
|
__get_user(env->gpr[HEX_REG_UGP], &sc->ugp);
|
|
|
|
__get_user(env->gpr[HEX_REG_PC], &sc->pc);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void restore_ucontext(CPUHexagonState *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(CPUHexagonState *env)
|
|
|
|
{
|
|
|
|
struct target_rt_sigframe *frame;
|
|
|
|
abi_ulong frame_addr;
|
|
|
|
|
|
|
|
frame_addr = env->gpr[HEX_REG_SP];
|
|
|
|
trace_user_do_sigreturn(env, frame_addr);
|
|
|
|
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
|
|
|
|
goto badframe;
|
|
|
|
}
|
|
|
|
|
|
|
|
restore_ucontext(env, &frame->uc);
|
2021-04-26 04:53:13 +02:00
|
|
|
target_restore_altstack(&frame->uc.uc_stack, env);
|
2021-02-08 06:46:20 +01:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
2021-09-29 15:05:35 +02:00
|
|
|
|
|
|
|
void setup_sigtramp(abi_ulong sigtramp_page)
|
|
|
|
{
|
|
|
|
uint32_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 4 * 2, 0);
|
|
|
|
assert(tramp != NULL);
|
|
|
|
|
|
|
|
default_rt_sigreturn = sigtramp_page;
|
|
|
|
install_sigtramp(tramp);
|
|
|
|
|
|
|
|
unlock_user(tramp, sigtramp_page, 4 * 2);
|
|
|
|
}
|