2018-04-24 21:26:16 +02:00
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/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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2018-04-24 21:26:18 +02:00
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#include "qemu/osdep.h"
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#include "qemu.h"
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#include "signal-common.h"
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#include "linux-user/trace.h"
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struct target_sigcontext {
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abi_ulong trap_no;
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abi_ulong error_code;
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abi_ulong oldmask;
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abi_ulong arm_r0;
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abi_ulong arm_r1;
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abi_ulong arm_r2;
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abi_ulong arm_r3;
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abi_ulong arm_r4;
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abi_ulong arm_r5;
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abi_ulong arm_r6;
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abi_ulong arm_r7;
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abi_ulong arm_r8;
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abi_ulong arm_r9;
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abi_ulong arm_r10;
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abi_ulong arm_fp;
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abi_ulong arm_ip;
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abi_ulong arm_sp;
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abi_ulong arm_lr;
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abi_ulong arm_pc;
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abi_ulong arm_cpsr;
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abi_ulong fault_address;
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};
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struct target_ucontext_v1 {
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abi_ulong tuc_flags;
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abi_ulong tuc_link;
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target_stack_t tuc_stack;
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask; /* mask last for extensibility */
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};
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struct target_ucontext_v2 {
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abi_ulong tuc_flags;
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abi_ulong tuc_link;
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target_stack_t tuc_stack;
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask; /* mask last for extensibility */
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char __unused[128 - sizeof(target_sigset_t)];
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abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
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};
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struct target_user_vfp {
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uint64_t fpregs[32];
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abi_ulong fpscr;
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};
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struct target_user_vfp_exc {
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abi_ulong fpexc;
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abi_ulong fpinst;
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abi_ulong fpinst2;
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};
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struct target_vfp_sigframe {
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abi_ulong magic;
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abi_ulong size;
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struct target_user_vfp ufp;
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struct target_user_vfp_exc ufp_exc;
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} __attribute__((__aligned__(8)));
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struct target_iwmmxt_sigframe {
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abi_ulong magic;
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abi_ulong size;
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uint64_t regs[16];
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/* Note that not all the coprocessor control registers are stored here */
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uint32_t wcssf;
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uint32_t wcasf;
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uint32_t wcgr0;
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uint32_t wcgr1;
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uint32_t wcgr2;
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uint32_t wcgr3;
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} __attribute__((__aligned__(8)));
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#define TARGET_VFP_MAGIC 0x56465001
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#define TARGET_IWMMXT_MAGIC 0x12ef842a
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struct sigframe_v1
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{
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struct target_sigcontext sc;
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abi_ulong extramask[TARGET_NSIG_WORDS-1];
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2018-04-30 10:03:44 +02:00
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abi_ulong retcode[4];
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2018-04-24 21:26:18 +02:00
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};
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struct sigframe_v2
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{
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struct target_ucontext_v2 uc;
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2018-04-30 10:03:44 +02:00
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abi_ulong retcode[4];
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2018-04-24 21:26:18 +02:00
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};
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struct rt_sigframe_v1
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{
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abi_ulong pinfo;
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abi_ulong puc;
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struct target_siginfo info;
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struct target_ucontext_v1 uc;
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2018-04-30 10:03:44 +02:00
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abi_ulong retcode[4];
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2018-04-24 21:26:18 +02:00
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};
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struct rt_sigframe_v2
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{
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struct target_siginfo info;
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struct target_ucontext_v2 uc;
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2018-04-30 10:03:44 +02:00
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abi_ulong retcode[4];
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2018-04-24 21:26:18 +02:00
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};
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#define TARGET_CONFIG_CPU_32 1
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/*
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* For ARM syscalls, we encode the syscall number into the instruction.
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*/
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#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
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#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
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/*
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* For Thumb syscalls, we pass the syscall number via r7. We therefore
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* need two 16-bit instructions.
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*/
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#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
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#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
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static const abi_ulong retcodes[4] = {
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SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
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SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
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};
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2018-04-30 10:03:44 +02:00
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/*
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* Stub needed to make sure the FD register (r9) contains the right
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* value.
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*/
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static const unsigned long sigreturn_fdpic_codes[3] = {
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0xe59fc004, /* ldr r12, [pc, #4] to read function descriptor */
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0xe59c9004, /* ldr r9, [r12, #4] to setup GOT */
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0xe59cf000 /* ldr pc, [r12] to jump into restorer */
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};
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static const unsigned long sigreturn_fdpic_thumb_codes[3] = {
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0xc008f8df, /* ldr r12, [pc, #8] to read function descriptor */
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0x9004f8dc, /* ldr r9, [r12, #4] to setup GOT */
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0xf000f8dc /* ldr pc, [r12] to jump into restorer */
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};
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2018-04-24 21:26:18 +02:00
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static inline int valid_user_regs(CPUARMState *regs)
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{
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return 1;
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}
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static void
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setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
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CPUARMState *env, abi_ulong mask)
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{
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__put_user(env->regs[0], &sc->arm_r0);
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__put_user(env->regs[1], &sc->arm_r1);
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__put_user(env->regs[2], &sc->arm_r2);
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__put_user(env->regs[3], &sc->arm_r3);
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__put_user(env->regs[4], &sc->arm_r4);
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__put_user(env->regs[5], &sc->arm_r5);
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__put_user(env->regs[6], &sc->arm_r6);
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__put_user(env->regs[7], &sc->arm_r7);
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__put_user(env->regs[8], &sc->arm_r8);
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__put_user(env->regs[9], &sc->arm_r9);
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__put_user(env->regs[10], &sc->arm_r10);
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__put_user(env->regs[11], &sc->arm_fp);
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__put_user(env->regs[12], &sc->arm_ip);
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__put_user(env->regs[13], &sc->arm_sp);
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__put_user(env->regs[14], &sc->arm_lr);
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__put_user(env->regs[15], &sc->arm_pc);
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#ifdef TARGET_CONFIG_CPU_32
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__put_user(cpsr_read(env), &sc->arm_cpsr);
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#endif
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__put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
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__put_user(/* current->thread.error_code */ 0, &sc->error_code);
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__put_user(/* current->thread.address */ 0, &sc->fault_address);
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__put_user(mask, &sc->oldmask);
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}
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static inline abi_ulong
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get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
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{
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2018-04-11 21:23:47 +02:00
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unsigned long sp;
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2018-04-24 21:26:18 +02:00
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2018-04-11 21:23:47 +02:00
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sp = target_sigsp(get_sp_from_cpustate(regs), ka);
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2018-04-24 21:26:18 +02:00
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/*
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* ATPCS B01 mandates 8-byte alignment
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*/
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return (sp - framesize) & ~7;
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}
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2018-04-30 10:03:44 +02:00
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static int
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2018-04-24 21:26:18 +02:00
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setup_return(CPUARMState *env, struct target_sigaction *ka,
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abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
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{
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2018-04-30 10:03:44 +02:00
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abi_ulong handler = 0;
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abi_ulong handler_fdpic_GOT = 0;
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2018-04-24 21:26:18 +02:00
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abi_ulong retcode;
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2018-04-30 10:03:44 +02:00
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int thumb;
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int is_fdpic = info_is_fdpic(((TaskState *)thread_cpu->opaque)->info);
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if (is_fdpic) {
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/* In FDPIC mode, ka->_sa_handler points to a function
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* descriptor (FD). The first word contains the address of the
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* handler. The second word contains the value of the PIC
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* register (r9). */
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abi_ulong funcdesc_ptr = ka->_sa_handler;
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if (get_user_ual(handler, funcdesc_ptr)
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|| get_user_ual(handler_fdpic_GOT, funcdesc_ptr + 4)) {
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return 1;
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}
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} else {
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handler = ka->_sa_handler;
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}
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thumb = handler & 1;
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2018-04-24 21:26:18 +02:00
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uint32_t cpsr = cpsr_read(env);
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cpsr &= ~CPSR_IT;
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if (thumb) {
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cpsr |= CPSR_T;
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} else {
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cpsr &= ~CPSR_T;
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}
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if (ka->sa_flags & TARGET_SA_RESTORER) {
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2018-04-30 10:03:44 +02:00
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if (is_fdpic) {
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/* For FDPIC we ensure that the restorer is called with a
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* correct r9 value. For that we need to write code on
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* the stack that sets r9 and jumps back to restorer
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* value.
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*/
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if (thumb) {
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__put_user(sigreturn_fdpic_thumb_codes[0], rc);
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__put_user(sigreturn_fdpic_thumb_codes[1], rc + 1);
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__put_user(sigreturn_fdpic_thumb_codes[2], rc + 2);
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__put_user((abi_ulong)ka->sa_restorer, rc + 3);
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} else {
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__put_user(sigreturn_fdpic_codes[0], rc);
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__put_user(sigreturn_fdpic_codes[1], rc + 1);
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__put_user(sigreturn_fdpic_codes[2], rc + 2);
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__put_user((abi_ulong)ka->sa_restorer, rc + 3);
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}
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retcode = rc_addr + thumb;
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} else {
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retcode = ka->sa_restorer;
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}
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2018-04-24 21:26:18 +02:00
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} else {
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unsigned int idx = thumb;
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if (ka->sa_flags & TARGET_SA_SIGINFO) {
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idx += 2;
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}
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__put_user(retcodes[idx], rc);
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retcode = rc_addr + thumb;
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}
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env->regs[0] = usig;
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2018-04-30 10:03:44 +02:00
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if (is_fdpic) {
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env->regs[9] = handler_fdpic_GOT;
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}
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2018-04-24 21:26:18 +02:00
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env->regs[13] = frame_addr;
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env->regs[14] = retcode;
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env->regs[15] = handler & (thumb ? ~1 : ~3);
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cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr);
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2018-04-30 10:03:44 +02:00
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return 0;
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2018-04-24 21:26:18 +02:00
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}
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static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
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{
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int i;
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struct target_vfp_sigframe *vfpframe;
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vfpframe = (struct target_vfp_sigframe *)regspace;
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__put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
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__put_user(sizeof(*vfpframe), &vfpframe->size);
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for (i = 0; i < 32; i++) {
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__put_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
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}
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__put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
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__put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
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__put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
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__put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
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return (abi_ulong*)(vfpframe+1);
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}
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static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
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CPUARMState *env)
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{
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int i;
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struct target_iwmmxt_sigframe *iwmmxtframe;
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iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
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__put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
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__put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
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for (i = 0; i < 16; i++) {
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__put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
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}
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__put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
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__put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
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__put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
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|
|
__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));
|
2018-04-11 21:23:47 +02:00
|
|
|
target_save_altstack(&stack, env);
|
2018-04-24 21:26:18 +02:00
|
|
|
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
|
|
|
|
|
|
|
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
|
|
|
/* Save coprocessor signal frame. */
|
|
|
|
regspace = uc->tuc_regspace;
|
2020-02-24 23:22:16 +01:00
|
|
|
if (cpu_isar_feature(aa32_vfp_simd, env_archcpu(env))) {
|
2018-04-24 21:26:18 +02:00
|
|
|
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]);
|
|
|
|
}
|
|
|
|
|
2018-04-30 10:03:44 +02:00
|
|
|
if (setup_return(regs, ka, frame->retcode, frame_addr, usig,
|
|
|
|
frame_addr + offsetof(struct sigframe_v1, retcode))) {
|
|
|
|
goto sigsegv;
|
|
|
|
}
|
2018-04-24 21:26:18 +02:00
|
|
|
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
sigsegv:
|
2018-04-30 10:03:44 +02:00
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
2018-04-24 21:26:18 +02:00
|
|
|
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);
|
|
|
|
|
2018-04-30 10:03:44 +02:00
|
|
|
if (setup_return(regs, ka, frame->retcode, frame_addr, usig,
|
|
|
|
frame_addr + offsetof(struct sigframe_v2, retcode))) {
|
|
|
|
goto sigsegv;
|
|
|
|
}
|
2018-04-24 21:26:18 +02:00
|
|
|
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
sigsegv:
|
2018-04-30 10:03:44 +02:00
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
2018-04-24 21:26:18 +02:00
|
|
|
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));
|
2018-04-11 21:23:47 +02:00
|
|
|
target_save_altstack(&stack, env);
|
2018-04-24 21:26:18 +02:00
|
|
|
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]);
|
|
|
|
}
|
|
|
|
|
2018-04-30 10:03:44 +02:00
|
|
|
if (setup_return(env, ka, frame->retcode, frame_addr, usig,
|
|
|
|
frame_addr + offsetof(struct rt_sigframe_v1, retcode))) {
|
|
|
|
goto sigsegv;
|
|
|
|
}
|
2018-04-24 21:26:18 +02:00
|
|
|
|
|
|
|
env->regs[1] = info_addr;
|
|
|
|
env->regs[2] = uc_addr;
|
|
|
|
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
sigsegv:
|
2018-04-30 10:03:44 +02:00
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
2018-04-24 21:26:18 +02:00
|
|
|
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);
|
|
|
|
|
2018-04-30 10:03:44 +02:00
|
|
|
if (setup_return(env, ka, frame->retcode, frame_addr, usig,
|
|
|
|
frame_addr + offsetof(struct rt_sigframe_v2, retcode))) {
|
|
|
|
goto sigsegv;
|
|
|
|
}
|
2018-04-24 21:26:18 +02:00
|
|
|
|
|
|
|
env->regs[1] = info_addr;
|
|
|
|
env->regs[2] = uc_addr;
|
|
|
|
|
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
|
|
|
return;
|
|
|
|
sigsegv:
|
2018-04-30 10:03:44 +02:00
|
|
|
unlock_user_struct(frame, frame_addr, 1);
|
2018-04-24 21:26:18 +02:00
|
|
|
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;
|
2020-02-24 23:22:16 +01:00
|
|
|
if (cpu_isar_feature(aa32_vfp_simd, env_archcpu(env))) {
|
2018-04-24 21:26:18 +02:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|