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提交 a8c33204 编写于 作者: P pbrook
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Update ARM non-rt sigframe layout. 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4385 c046a42c-6fe2-441c-8c8c-71466251a162
上级 1ffc346f
隐藏空白更改
内联 并排
Showing with 165 addition and 101 deletion
linux-user/signal.c
浏览文件 @ a8c33204
......@@ -1038,13 +1038,19 @@ struct target_ucontext_v2 {
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
};
struct sigframe
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;
......@@ -1082,7 +1088,6 @@ static const abi_ulong retcodes[4] = {
};
#define __put_user_error(x,p,e) __put_user(x, p)
#define __get_user_error(x,p,e) __get_user(x, p)
static inline int valid_user_regs(CPUState *regs)
......@@ -1090,38 +1095,34 @@ static inline int valid_user_regs(CPUState *regs)
return 1;
}
static int
static void
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
CPUState *env, abi_ulong mask)
{
int err = 0;
__put_user_error(env->regs[0], &sc->arm_r0, err);
__put_user_error(env->regs[1], &sc->arm_r1, err);
__put_user_error(env->regs[2], &sc->arm_r2, err);
__put_user_error(env->regs[3], &sc->arm_r3, err);
__put_user_error(env->regs[4], &sc->arm_r4, err);
__put_user_error(env->regs[5], &sc->arm_r5, err);
__put_user_error(env->regs[6], &sc->arm_r6, err);
__put_user_error(env->regs[7], &sc->arm_r7, err);
__put_user_error(env->regs[8], &sc->arm_r8, err);
__put_user_error(env->regs[9], &sc->arm_r9, err);
__put_user_error(env->regs[10], &sc->arm_r10, err);
__put_user_error(env->regs[11], &sc->arm_fp, err);
__put_user_error(env->regs[12], &sc->arm_ip, err);
__put_user_error(env->regs[13], &sc->arm_sp, err);
__put_user_error(env->regs[14], &sc->arm_lr, err);
__put_user_error(env->regs[15], &sc->arm_pc, err);
__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_error(cpsr_read(env), &sc->arm_cpsr, err);
__put_user(cpsr_read(env), &sc->arm_cpsr);
#endif
__put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
__put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
__put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
__put_user_error(mask, &sc->oldmask, err);
return err;
__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
......@@ -1180,31 +1181,78 @@ setup_return(CPUState *env, struct emulated_sigaction *ka,
return 0;
}
static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
target_sigset_t *set, CPUState *env)
{
struct target_sigaltstack stack;
int i;
/* 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]);
/* FIXME: Save coprocessor signal frame. */
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(int usig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *regs)
static void setup_frame_v1(int usig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *regs)
{
struct sigframe *frame;
struct sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
int i, err = 0;
int i;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return;
err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
setup_sigcontext(&frame->sc, regs, set->sig[0]);
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
if (__put_user(set->sig[i], &frame->extramask[i - 1]))
goto end;
}
if (err == 0)
err = setup_return(regs, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct sigframe, retcode));
setup_return(regs, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct sigframe_v1, retcode));
end:
unlock_user_struct(frame, frame_addr, 1);
// return err;
}
static void setup_frame_v2(int usig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *regs)
{
struct sigframe_v2 *frame;
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return;
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);
}
static void setup_frame(int usig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *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() */
......@@ -1215,17 +1263,17 @@ static void setup_rt_frame_v1(int usig, struct emulated_sigaction *ka,
struct rt_sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
struct target_sigaltstack stack;
int i, err = 0;
int i;
abi_ulong info_addr, uc_addr;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return /* 1 */;
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
__put_user_error(info_addr, &frame->pinfo, err);
__put_user(info_addr, &frame->pinfo);
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
__put_user_error(uc_addr, &frame->puc, err);
err |= copy_siginfo_to_user(&frame->info, info);
__put_user(uc_addr, &frame->puc);
copy_siginfo_to_user(&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));
......@@ -1236,26 +1284,20 @@ static void setup_rt_frame_v1(int usig, struct emulated_sigaction *ka,
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
env, set->sig[0]);
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
goto end;
}
if (err == 0)
err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
setup_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
if (err == 0) {
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
}
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
end:
unlock_user_struct(frame, frame_addr, 1);
// return err;
}
static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka,
......@@ -1264,8 +1306,6 @@ static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka,
{
struct rt_sigframe_v2 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
struct target_sigaltstack stack;
int i, err = 0;
abi_ulong info_addr, uc_addr;
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
......@@ -1273,42 +1313,17 @@ static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka,
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
err |= copy_siginfo_to_user(&frame->info, info);
copy_siginfo_to_user(&frame->info, info);
/* Clear all the bits of the ucontext we don't use. */
memset(&frame->uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
setup_sigframe_v2(&frame->uc, set, env);
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_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
env, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
goto end;
}
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
if (err == 0)
err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
if (err == 0) {
/*
* For realtime signals we must also set the second and third
* arguments for the signal handler.
* -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
*/
env->regs[1] = info_addr;
env->regs[2] = uc_addr;
}
end:
unlock_user_struct(frame, frame_addr, 1);
// return err;
}
static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
......@@ -1354,10 +1369,10 @@ restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
return err;
}
long do_sigreturn(CPUState *env)
long do_sigreturn_v1(CPUState *env)
{
abi_ulong frame_addr;
struct sigframe *frame;
struct sigframe_v1 *frame;
target_sigset_t set;
sigset_t host_set;
int i;
......@@ -1401,6 +1416,67 @@ badframe:
return 0;
}
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
struct target_ucontext_v2 *uc)
{
sigset_t host_set;
target_to_host_sigset(&host_set, &uc->tuc_sigmask);
sigprocmask(SIG_SETMASK, &host_set, NULL);
if (restore_sigcontext(env, &uc->tuc_mcontext))
return 1;
if (do_sigaltstack(frame_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;
}
long do_sigreturn_v2(CPUState *env)
{
abi_ulong frame_addr;
struct sigframe_v2 *frame;
/*
* 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.
*/
if (env->regs[13] & 7)
goto badframe;
frame_addr = env->regs[13];
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
goto badframe;
unlock_user_struct(frame, frame_addr, 0);
return env->regs[0];
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(SIGSEGV /* , current */);
return 0;
}
long do_sigreturn(CPUState *env)
{
if (get_osversion() >= 0x020612) {
return do_sigreturn_v2(env);
} else {
return do_sigreturn_v1(env);
}
}
long do_rt_sigreturn_v1(CPUState *env)
{
abi_ulong frame_addr;
......@@ -1446,7 +1522,6 @@ long do_rt_sigreturn_v2(CPUState *env)
{
abi_ulong frame_addr;
struct rt_sigframe_v2 *frame;
sigset_t host_set;
/*
* Since we stacked the signal on a 64-bit boundary,
......@@ -1460,20 +1535,9 @@ long do_rt_sigreturn_v2(CPUState *env)
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
goto badframe;
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
sigprocmask(SIG_SETMASK, &host_set, NULL);
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
goto badframe;
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v2, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
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 env->regs[0];
......
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