2 * Copyright (C) 1991, 1992 Linus Torvalds
4 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
5 * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
8 #include <linux/sched.h>
10 #include <linux/smp.h>
11 #include <linux/kernel.h>
12 #include <linux/signal.h>
13 #include <linux/errno.h>
14 #include <linux/wait.h>
15 #include <linux/ptrace.h>
16 #include <linux/tracehook.h>
17 #include <linux/unistd.h>
18 #include <linux/stddef.h>
19 #include <linux/personality.h>
20 #include <linux/uaccess.h>
22 #include <asm/processor.h>
23 #include <asm/ucontext.h>
28 #include <asm/proto.h>
29 #include <asm/ia32_unistd.h>
31 #endif /* CONFIG_X86_64 */
33 #include <asm/syscall.h>
34 #include <asm/syscalls.h>
38 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
40 #define __FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \
41 X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \
42 X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \
46 # define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF)
48 # define FIX_EFLAGS __FIX_EFLAGS
55 } __attribute__((packed
)) retcode
= {
56 0xb858, /* popl %eax; movl $..., %eax */
58 0x80cd, /* int $0x80 */
66 } __attribute__((packed
)) rt_retcode
= {
67 0xb8, /* movl $..., %eax */
69 0x80cd, /* int $0x80 */
74 err |= __get_user(regs->x, &sc->x); \
77 #define COPY_SEG(seg) { \
79 err |= __get_user(tmp, &sc->seg); \
83 #define COPY_SEG_CPL3(seg) { \
85 err |= __get_user(tmp, &sc->seg); \
86 regs->seg = tmp | 3; \
89 #define GET_SEG(seg) { \
91 err |= __get_user(tmp, &sc->seg); \
92 loadsegment(seg, tmp); \
96 restore_sigcontext(struct pt_regs
*regs
, struct sigcontext __user
*sc
,
100 unsigned int tmpflags
;
101 unsigned int err
= 0;
103 /* Always make any pending restarted system calls return -EINTR */
104 current_thread_info()->restart_block
.fn
= do_no_restart_syscall
;
111 #endif /* CONFIG_X86_32 */
113 COPY(di
); COPY(si
); COPY(bp
); COPY(sp
); COPY(bx
);
114 COPY(dx
); COPY(cx
); COPY(ip
);
125 #endif /* CONFIG_X86_64 */
130 #else /* !CONFIG_X86_32 */
131 /* Kernel saves and restores only the CS segment register on signals,
132 * which is the bare minimum needed to allow mixed 32/64-bit code.
133 * App's signal handler can save/restore other segments if needed. */
135 #endif /* CONFIG_X86_32 */
137 err
|= __get_user(tmpflags
, &sc
->flags
);
138 regs
->flags
= (regs
->flags
& ~FIX_EFLAGS
) | (tmpflags
& FIX_EFLAGS
);
139 regs
->orig_ax
= -1; /* disable syscall checks */
141 err
|= __get_user(buf
, &sc
->fpstate
);
142 err
|= restore_i387_xstate(buf
);
144 err
|= __get_user(*pax
, &sc
->ax
);
149 setup_sigcontext(struct sigcontext __user
*sc
, void __user
*fpstate
,
150 struct pt_regs
*regs
, unsigned long mask
)
158 savesegment(gs
, tmp
);
159 err
|= __put_user(tmp
, (unsigned int __user
*)&sc
->gs
);
161 err
|= __put_user(regs
->fs
, (unsigned int __user
*)&sc
->fs
);
162 err
|= __put_user(regs
->es
, (unsigned int __user
*)&sc
->es
);
163 err
|= __put_user(regs
->ds
, (unsigned int __user
*)&sc
->ds
);
164 #endif /* CONFIG_X86_32 */
166 err
|= __put_user(regs
->di
, &sc
->di
);
167 err
|= __put_user(regs
->si
, &sc
->si
);
168 err
|= __put_user(regs
->bp
, &sc
->bp
);
169 err
|= __put_user(regs
->sp
, &sc
->sp
);
170 err
|= __put_user(regs
->bx
, &sc
->bx
);
171 err
|= __put_user(regs
->dx
, &sc
->dx
);
172 err
|= __put_user(regs
->cx
, &sc
->cx
);
173 err
|= __put_user(regs
->ax
, &sc
->ax
);
175 err
|= __put_user(regs
->r8
, &sc
->r8
);
176 err
|= __put_user(regs
->r9
, &sc
->r9
);
177 err
|= __put_user(regs
->r10
, &sc
->r10
);
178 err
|= __put_user(regs
->r11
, &sc
->r11
);
179 err
|= __put_user(regs
->r12
, &sc
->r12
);
180 err
|= __put_user(regs
->r13
, &sc
->r13
);
181 err
|= __put_user(regs
->r14
, &sc
->r14
);
182 err
|= __put_user(regs
->r15
, &sc
->r15
);
183 #endif /* CONFIG_X86_64 */
185 err
|= __put_user(current
->thread
.trap_no
, &sc
->trapno
);
186 err
|= __put_user(current
->thread
.error_code
, &sc
->err
);
187 err
|= __put_user(regs
->ip
, &sc
->ip
);
189 err
|= __put_user(regs
->cs
, (unsigned int __user
*)&sc
->cs
);
190 err
|= __put_user(regs
->flags
, &sc
->flags
);
191 err
|= __put_user(regs
->sp
, &sc
->sp_at_signal
);
192 err
|= __put_user(regs
->ss
, (unsigned int __user
*)&sc
->ss
);
193 #else /* !CONFIG_X86_32 */
194 err
|= __put_user(regs
->flags
, &sc
->flags
);
195 err
|= __put_user(regs
->cs
, &sc
->cs
);
196 err
|= __put_user(0, &sc
->gs
);
197 err
|= __put_user(0, &sc
->fs
);
198 #endif /* CONFIG_X86_32 */
200 err
|= __put_user(fpstate
, &sc
->fpstate
);
202 /* non-iBCS2 extensions.. */
203 err
|= __put_user(mask
, &sc
->oldmask
);
204 err
|= __put_user(current
->thread
.cr2
, &sc
->cr2
);
210 * Atomically swap in the new signal mask, and wait for a signal.
213 sys_sigsuspend(int history0
, int history1
, old_sigset_t mask
)
216 spin_lock_irq(¤t
->sighand
->siglock
);
217 current
->saved_sigmask
= current
->blocked
;
218 siginitset(¤t
->blocked
, mask
);
220 spin_unlock_irq(¤t
->sighand
->siglock
);
222 current
->state
= TASK_INTERRUPTIBLE
;
224 set_restore_sigmask();
226 return -ERESTARTNOHAND
;
230 sys_sigaction(int sig
, const struct old_sigaction __user
*act
,
231 struct old_sigaction __user
*oact
)
233 struct k_sigaction new_ka
, old_ka
;
239 if (!access_ok(VERIFY_READ
, act
, sizeof(*act
)) ||
240 __get_user(new_ka
.sa
.sa_handler
, &act
->sa_handler
) ||
241 __get_user(new_ka
.sa
.sa_restorer
, &act
->sa_restorer
))
244 __get_user(new_ka
.sa
.sa_flags
, &act
->sa_flags
);
245 __get_user(mask
, &act
->sa_mask
);
246 siginitset(&new_ka
.sa
.sa_mask
, mask
);
249 ret
= do_sigaction(sig
, act
? &new_ka
: NULL
, oact
? &old_ka
: NULL
);
252 if (!access_ok(VERIFY_WRITE
, oact
, sizeof(*oact
)) ||
253 __put_user(old_ka
.sa
.sa_handler
, &oact
->sa_handler
) ||
254 __put_user(old_ka
.sa
.sa_restorer
, &oact
->sa_restorer
))
257 __put_user(old_ka
.sa
.sa_flags
, &oact
->sa_flags
);
258 __put_user(old_ka
.sa
.sa_mask
.sig
[0], &oact
->sa_mask
);
265 asmlinkage
int sys_sigaltstack(unsigned long bx
)
268 * This is needed to make gcc realize it doesn't own the
271 struct pt_regs
*regs
= (struct pt_regs
*)&bx
;
272 const stack_t __user
*uss
= (const stack_t __user
*)bx
;
273 stack_t __user
*uoss
= (stack_t __user
*)regs
->cx
;
275 return do_sigaltstack(uss
, uoss
, regs
->sp
);
277 #else /* !CONFIG_X86_32 */
279 sys_sigaltstack(const stack_t __user
*uss
, stack_t __user
*uoss
,
280 struct pt_regs
*regs
)
282 return do_sigaltstack(uss
, uoss
, regs
->sp
);
284 #endif /* CONFIG_X86_32 */
287 * Do a signal return; undo the signal stack.
289 asmlinkage
unsigned long sys_sigreturn(unsigned long __unused
)
291 struct sigframe __user
*frame
;
292 struct pt_regs
*regs
;
296 regs
= (struct pt_regs
*) &__unused
;
297 frame
= (struct sigframe __user
*)(regs
->sp
- 8);
299 if (!access_ok(VERIFY_READ
, frame
, sizeof(*frame
)))
301 if (__get_user(set
.sig
[0], &frame
->sc
.oldmask
) || (_NSIG_WORDS
> 1
302 && __copy_from_user(&set
.sig
[1], &frame
->extramask
,
303 sizeof(frame
->extramask
))))
306 sigdelsetmask(&set
, ~_BLOCKABLE
);
307 spin_lock_irq(¤t
->sighand
->siglock
);
308 current
->blocked
= set
;
310 spin_unlock_irq(¤t
->sighand
->siglock
);
312 if (restore_sigcontext(regs
, &frame
->sc
, &ax
))
317 if (show_unhandled_signals
&& printk_ratelimit()) {
318 printk("%s%s[%d] bad frame in sigreturn frame:"
319 "%p ip:%lx sp:%lx oeax:%lx",
320 task_pid_nr(current
) > 1 ? KERN_INFO
: KERN_EMERG
,
321 current
->comm
, task_pid_nr(current
), frame
, regs
->ip
,
322 regs
->sp
, regs
->orig_ax
);
323 print_vma_addr(" in ", regs
->ip
);
324 printk(KERN_CONT
"\n");
327 force_sig(SIGSEGV
, current
);
332 static long do_rt_sigreturn(struct pt_regs
*regs
)
334 struct rt_sigframe __user
*frame
;
338 frame
= (struct rt_sigframe __user
*)(regs
->sp
- sizeof(long));
339 if (!access_ok(VERIFY_READ
, frame
, sizeof(*frame
)))
341 if (__copy_from_user(&set
, &frame
->uc
.uc_sigmask
, sizeof(set
)))
344 sigdelsetmask(&set
, ~_BLOCKABLE
);
345 spin_lock_irq(¤t
->sighand
->siglock
);
346 current
->blocked
= set
;
348 spin_unlock_irq(¤t
->sighand
->siglock
);
350 if (restore_sigcontext(regs
, &frame
->uc
.uc_mcontext
, &ax
))
353 if (do_sigaltstack(&frame
->uc
.uc_stack
, NULL
, regs
->sp
) == -EFAULT
)
359 signal_fault(regs
, frame
, "rt_sigreturn");
364 asmlinkage
int sys_rt_sigreturn(unsigned long __unused
)
366 struct pt_regs
*regs
= (struct pt_regs
*)&__unused
;
368 return do_rt_sigreturn(regs
);
370 #else /* !CONFIG_X86_32 */
371 asmlinkage
long sys_rt_sigreturn(struct pt_regs
*regs
)
373 return do_rt_sigreturn(regs
);
375 #endif /* CONFIG_X86_32 */
378 * Set up a signal frame.
382 * Determine which stack to use..
384 static inline void __user
*
385 get_sigframe(struct k_sigaction
*ka
, struct pt_regs
*regs
, size_t frame_size
,
390 /* Default to using normal stack */
394 * If we are on the alternate signal stack and would overflow it, don't.
395 * Return an always-bogus address instead so we will die with SIGSEGV.
397 if (on_sig_stack(sp
) && !likely(on_sig_stack(sp
- frame_size
)))
398 return (void __user
*) -1L;
400 /* This is the X/Open sanctioned signal stack switching. */
401 if (ka
->sa
.sa_flags
& SA_ONSTACK
) {
402 if (sas_ss_flags(sp
) == 0)
403 sp
= current
->sas_ss_sp
+ current
->sas_ss_size
;
405 /* This is the legacy signal stack switching. */
406 if ((regs
->ss
& 0xffff) != __USER_DS
&&
407 !(ka
->sa
.sa_flags
& SA_RESTORER
) &&
409 sp
= (unsigned long) ka
->sa
.sa_restorer
;
413 sp
= sp
- sig_xstate_size
;
414 *fpstate
= (struct _fpstate
*) sp
;
415 if (save_i387_xstate(*fpstate
) < 0)
416 return (void __user
*)-1L;
421 * Align the stack pointer according to the i386 ABI,
422 * i.e. so that on function entry ((sp + 4) & 15) == 0.
424 sp
= ((sp
+ 4) & -16ul) - 4;
426 return (void __user
*) sp
;
430 __setup_frame(int sig
, struct k_sigaction
*ka
, sigset_t
*set
,
431 struct pt_regs
*regs
)
433 struct sigframe __user
*frame
;
434 void __user
*restorer
;
436 void __user
*fpstate
= NULL
;
438 frame
= get_sigframe(ka
, regs
, sizeof(*frame
), &fpstate
);
440 if (!access_ok(VERIFY_WRITE
, frame
, sizeof(*frame
)))
443 if (__put_user(sig
, &frame
->sig
))
446 if (setup_sigcontext(&frame
->sc
, fpstate
, regs
, set
->sig
[0]))
449 if (_NSIG_WORDS
> 1) {
450 if (__copy_to_user(&frame
->extramask
, &set
->sig
[1],
451 sizeof(frame
->extramask
)))
455 if (current
->mm
->context
.vdso
)
456 restorer
= VDSO32_SYMBOL(current
->mm
->context
.vdso
, sigreturn
);
458 restorer
= &frame
->retcode
;
459 if (ka
->sa
.sa_flags
& SA_RESTORER
)
460 restorer
= ka
->sa
.sa_restorer
;
462 /* Set up to return from userspace. */
463 err
|= __put_user(restorer
, &frame
->pretcode
);
466 * This is popl %eax ; movl $__NR_sigreturn, %eax ; int $0x80
468 * WE DO NOT USE IT ANY MORE! It's only left here for historical
469 * reasons and because gdb uses it as a signature to notice
470 * signal handler stack frames.
472 err
|= __put_user(*((u64
*)&retcode
), (u64
*)frame
->retcode
);
477 /* Set up registers for signal handler */
478 regs
->sp
= (unsigned long)frame
;
479 regs
->ip
= (unsigned long)ka
->sa
.sa_handler
;
480 regs
->ax
= (unsigned long)sig
;
484 regs
->ds
= __USER_DS
;
485 regs
->es
= __USER_DS
;
486 regs
->ss
= __USER_DS
;
487 regs
->cs
= __USER_CS
;
492 static int __setup_rt_frame(int sig
, struct k_sigaction
*ka
, siginfo_t
*info
,
493 sigset_t
*set
, struct pt_regs
*regs
)
495 struct rt_sigframe __user
*frame
;
496 void __user
*restorer
;
498 void __user
*fpstate
= NULL
;
500 frame
= get_sigframe(ka
, regs
, sizeof(*frame
), &fpstate
);
502 if (!access_ok(VERIFY_WRITE
, frame
, sizeof(*frame
)))
505 err
|= __put_user(sig
, &frame
->sig
);
506 err
|= __put_user(&frame
->info
, &frame
->pinfo
);
507 err
|= __put_user(&frame
->uc
, &frame
->puc
);
508 err
|= copy_siginfo_to_user(&frame
->info
, info
);
512 /* Create the ucontext. */
514 err
|= __put_user(UC_FP_XSTATE
, &frame
->uc
.uc_flags
);
516 err
|= __put_user(0, &frame
->uc
.uc_flags
);
517 err
|= __put_user(0, &frame
->uc
.uc_link
);
518 err
|= __put_user(current
->sas_ss_sp
, &frame
->uc
.uc_stack
.ss_sp
);
519 err
|= __put_user(sas_ss_flags(regs
->sp
),
520 &frame
->uc
.uc_stack
.ss_flags
);
521 err
|= __put_user(current
->sas_ss_size
, &frame
->uc
.uc_stack
.ss_size
);
522 err
|= setup_sigcontext(&frame
->uc
.uc_mcontext
, fpstate
,
524 err
|= __copy_to_user(&frame
->uc
.uc_sigmask
, set
, sizeof(*set
));
528 /* Set up to return from userspace. */
529 restorer
= VDSO32_SYMBOL(current
->mm
->context
.vdso
, rt_sigreturn
);
530 if (ka
->sa
.sa_flags
& SA_RESTORER
)
531 restorer
= ka
->sa
.sa_restorer
;
532 err
|= __put_user(restorer
, &frame
->pretcode
);
535 * This is movl $__NR_rt_sigreturn, %ax ; int $0x80
537 * WE DO NOT USE IT ANY MORE! It's only left here for historical
538 * reasons and because gdb uses it as a signature to notice
539 * signal handler stack frames.
541 err
|= __put_user(*((u64
*)&rt_retcode
), (u64
*)frame
->retcode
);
546 /* Set up registers for signal handler */
547 regs
->sp
= (unsigned long)frame
;
548 regs
->ip
= (unsigned long)ka
->sa
.sa_handler
;
549 regs
->ax
= (unsigned long)sig
;
550 regs
->dx
= (unsigned long)&frame
->info
;
551 regs
->cx
= (unsigned long)&frame
->uc
;
553 regs
->ds
= __USER_DS
;
554 regs
->es
= __USER_DS
;
555 regs
->ss
= __USER_DS
;
556 regs
->cs
= __USER_CS
;
562 * OK, we're invoking a handler:
564 static int signr_convert(int sig
)
567 struct thread_info
*info
= current_thread_info();
569 if (info
->exec_domain
&& info
->exec_domain
->signal_invmap
&& sig
< 32)
570 return info
->exec_domain
->signal_invmap
[sig
];
571 #endif /* CONFIG_X86_32 */
578 #define ia32_setup_frame __setup_frame
579 #define ia32_setup_rt_frame __setup_rt_frame
581 #else /* !CONFIG_X86_32 */
583 #ifdef CONFIG_IA32_EMULATION
584 #define is_ia32 test_thread_flag(TIF_IA32)
585 #else /* !CONFIG_IA32_EMULATION */
587 #endif /* CONFIG_IA32_EMULATION */
589 #endif /* CONFIG_X86_32 */
592 setup_rt_frame(int sig
, struct k_sigaction
*ka
, siginfo_t
*info
,
593 sigset_t
*set
, struct pt_regs
*regs
)
595 int usig
= signr_convert(sig
);
598 /* Set up the stack frame */
600 if (ka
->sa
.sa_flags
& SA_SIGINFO
)
601 ret
= ia32_setup_rt_frame(usig
, ka
, info
, set
, regs
);
603 ret
= ia32_setup_frame(usig
, ka
, set
, regs
);
605 ret
= __setup_rt_frame(sig
, ka
, info
, set
, regs
);
608 force_sigsegv(sig
, current
);
616 handle_signal(unsigned long sig
, siginfo_t
*info
, struct k_sigaction
*ka
,
617 sigset_t
*oldset
, struct pt_regs
*regs
)
621 /* Are we from a system call? */
622 if (syscall_get_nr(current
, regs
) >= 0) {
623 /* If so, check system call restarting.. */
624 switch (syscall_get_error(current
, regs
)) {
625 case -ERESTART_RESTARTBLOCK
:
626 case -ERESTARTNOHAND
:
631 if (!(ka
->sa
.sa_flags
& SA_RESTART
)) {
636 case -ERESTARTNOINTR
:
637 regs
->ax
= regs
->orig_ax
;
644 * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
645 * flag so that register information in the sigcontext is correct.
647 if (unlikely(regs
->flags
& X86_EFLAGS_TF
) &&
648 likely(test_and_clear_thread_flag(TIF_FORCED_TF
)))
649 regs
->flags
&= ~X86_EFLAGS_TF
;
651 ret
= setup_rt_frame(sig
, ka
, info
, oldset
, regs
);
658 * This has nothing to do with segment registers,
659 * despite the name. This magic affects uaccess.h
660 * macros' behavior. Reset it to the normal setting.
666 * Clear the direction flag as per the ABI for function entry.
668 regs
->flags
&= ~X86_EFLAGS_DF
;
671 * Clear TF when entering the signal handler, but
672 * notify any tracer that was single-stepping it.
673 * The tracer may want to single-step inside the
676 regs
->flags
&= ~X86_EFLAGS_TF
;
678 spin_lock_irq(¤t
->sighand
->siglock
);
679 sigorsets(¤t
->blocked
, ¤t
->blocked
, &ka
->sa
.sa_mask
);
680 if (!(ka
->sa
.sa_flags
& SA_NODEFER
))
681 sigaddset(¤t
->blocked
, sig
);
683 spin_unlock_irq(¤t
->sighand
->siglock
);
685 tracehook_signal_handler(sig
, info
, ka
, regs
,
686 test_thread_flag(TIF_SINGLESTEP
));
692 #define NR_restart_syscall __NR_restart_syscall
693 #else /* !CONFIG_X86_32 */
694 #define NR_restart_syscall \
695 test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
696 #endif /* CONFIG_X86_32 */
699 * Note that 'init' is a special process: it doesn't get signals it doesn't
700 * want to handle. Thus you cannot kill init even with a SIGKILL even by
703 static void do_signal(struct pt_regs
*regs
)
705 struct k_sigaction ka
;
711 * We want the common case to go fast, which is why we may in certain
712 * cases get here from kernel mode. Just return without doing anything
714 * X86_32: vm86 regs switched out by assembly code before reaching
715 * here, so testing against kernel CS suffices.
717 if (!user_mode(regs
))
720 if (current_thread_info()->status
& TS_RESTORE_SIGMASK
)
721 oldset
= ¤t
->saved_sigmask
;
723 oldset
= ¤t
->blocked
;
725 signr
= get_signal_to_deliver(&info
, &ka
, regs
, NULL
);
728 * Re-enable any watchpoints before delivering the
729 * signal to user space. The processor register will
730 * have been cleared if the watchpoint triggered
733 if (current
->thread
.debugreg7
)
734 set_debugreg(current
->thread
.debugreg7
, 7);
736 /* Whee! Actually deliver the signal. */
737 if (handle_signal(signr
, &info
, &ka
, oldset
, regs
) == 0) {
739 * A signal was successfully delivered; the saved
740 * sigmask will have been stored in the signal frame,
741 * and will be restored by sigreturn, so we can simply
742 * clear the TS_RESTORE_SIGMASK flag.
744 current_thread_info()->status
&= ~TS_RESTORE_SIGMASK
;
749 /* Did we come from a system call? */
750 if (syscall_get_nr(current
, regs
) >= 0) {
751 /* Restart the system call - no handlers present */
752 switch (syscall_get_error(current
, regs
)) {
753 case -ERESTARTNOHAND
:
755 case -ERESTARTNOINTR
:
756 regs
->ax
= regs
->orig_ax
;
760 case -ERESTART_RESTARTBLOCK
:
761 regs
->ax
= NR_restart_syscall
;
768 * If there's no signal to deliver, we just put the saved sigmask
771 if (current_thread_info()->status
& TS_RESTORE_SIGMASK
) {
772 current_thread_info()->status
&= ~TS_RESTORE_SIGMASK
;
773 sigprocmask(SIG_SETMASK
, ¤t
->saved_sigmask
, NULL
);
778 * notification of userspace execution resumption
779 * - triggered by the TIF_WORK_MASK flags
782 do_notify_resume(struct pt_regs
*regs
, void *unused
, __u32 thread_info_flags
)
784 #if defined(CONFIG_X86_64) && defined(CONFIG_X86_MCE)
785 /* notify userspace of pending MCEs */
786 if (thread_info_flags
& _TIF_MCE_NOTIFY
)
788 #endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
790 /* deal with pending signal delivery */
791 if (thread_info_flags
& _TIF_SIGPENDING
)
794 if (thread_info_flags
& _TIF_NOTIFY_RESUME
) {
795 clear_thread_flag(TIF_NOTIFY_RESUME
);
796 tracehook_notify_resume(regs
);
800 clear_thread_flag(TIF_IRET
);
801 #endif /* CONFIG_X86_32 */
804 void signal_fault(struct pt_regs
*regs
, void __user
*frame
, char *where
)
806 struct task_struct
*me
= current
;
808 if (show_unhandled_signals
&& printk_ratelimit()) {
810 "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
811 me
->comm
, me
->pid
, where
, frame
,
812 regs
->ip
, regs
->sp
, regs
->orig_ax
);
813 print_vma_addr(" in ", regs
->ip
);
814 printk(KERN_CONT
"\n");
817 force_sig(SIGSEGV
, me
);