2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
5 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
6 * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
7 * 2000-2002 x86-64 support by Andi Kleen
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/sched.h>
14 #include <linux/smp.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/wait.h>
18 #include <linux/tracehook.h>
19 #include <linux/unistd.h>
20 #include <linux/stddef.h>
21 #include <linux/personality.h>
22 #include <linux/uaccess.h>
23 #include <linux/user-return-notifier.h>
24 #include <linux/uprobes.h>
26 #include <asm/processor.h>
27 #include <asm/ucontext.h>
29 #include <asm/fpu-internal.h>
32 #include <asm/sighandling.h>
35 #include <asm/proto.h>
36 #include <asm/ia32_unistd.h>
37 #include <asm/sys_ia32.h>
38 #endif /* CONFIG_X86_64 */
40 #include <asm/syscall.h>
41 #include <asm/syscalls.h>
43 #include <asm/sigframe.h>
46 # define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF)
48 # define FIX_EFLAGS __FIX_EFLAGS
51 #define COPY(x) do { \
52 get_user_ex(regs->x, &sc->x); \
55 #define GET_SEG(seg) ({ \
57 get_user_ex(tmp, &sc->seg); \
61 #define COPY_SEG(seg) do { \
62 regs->seg = GET_SEG(seg); \
65 #define COPY_SEG_CPL3(seg) do { \
66 regs->seg = GET_SEG(seg) | 3; \
69 int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
73 unsigned int tmpflags;
76 /* Always make any pending restarted system calls return -EINTR */
77 current_thread_info()->restart_block.fn = do_no_restart_syscall;
82 set_user_gs(regs, GET_SEG(gs));
86 #endif /* CONFIG_X86_32 */
88 COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
89 COPY(dx); COPY(cx); COPY(ip);
100 #endif /* CONFIG_X86_64 */
105 #else /* !CONFIG_X86_32 */
106 /* Kernel saves and restores only the CS segment register on signals,
107 * which is the bare minimum needed to allow mixed 32/64-bit code.
108 * App's signal handler can save/restore other segments if needed. */
110 #endif /* CONFIG_X86_32 */
112 get_user_ex(tmpflags, &sc->flags);
113 regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
114 regs->orig_ax = -1; /* disable syscall checks */
116 get_user_ex(buf, &sc->fpstate);
117 err |= restore_xstate_sig(buf, config_enabled(CONFIG_X86_32));
119 get_user_ex(*pax, &sc->ax);
120 } get_user_catch(err);
125 int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
126 struct pt_regs *regs, unsigned long mask)
133 put_user_ex(get_user_gs(regs), (unsigned int __user *)&sc->gs);
134 put_user_ex(regs->fs, (unsigned int __user *)&sc->fs);
135 put_user_ex(regs->es, (unsigned int __user *)&sc->es);
136 put_user_ex(regs->ds, (unsigned int __user *)&sc->ds);
137 #endif /* CONFIG_X86_32 */
139 put_user_ex(regs->di, &sc->di);
140 put_user_ex(regs->si, &sc->si);
141 put_user_ex(regs->bp, &sc->bp);
142 put_user_ex(regs->sp, &sc->sp);
143 put_user_ex(regs->bx, &sc->bx);
144 put_user_ex(regs->dx, &sc->dx);
145 put_user_ex(regs->cx, &sc->cx);
146 put_user_ex(regs->ax, &sc->ax);
148 put_user_ex(regs->r8, &sc->r8);
149 put_user_ex(regs->r9, &sc->r9);
150 put_user_ex(regs->r10, &sc->r10);
151 put_user_ex(regs->r11, &sc->r11);
152 put_user_ex(regs->r12, &sc->r12);
153 put_user_ex(regs->r13, &sc->r13);
154 put_user_ex(regs->r14, &sc->r14);
155 put_user_ex(regs->r15, &sc->r15);
156 #endif /* CONFIG_X86_64 */
158 put_user_ex(current->thread.trap_nr, &sc->trapno);
159 put_user_ex(current->thread.error_code, &sc->err);
160 put_user_ex(regs->ip, &sc->ip);
162 put_user_ex(regs->cs, (unsigned int __user *)&sc->cs);
163 put_user_ex(regs->flags, &sc->flags);
164 put_user_ex(regs->sp, &sc->sp_at_signal);
165 put_user_ex(regs->ss, (unsigned int __user *)&sc->ss);
166 #else /* !CONFIG_X86_32 */
167 put_user_ex(regs->flags, &sc->flags);
168 put_user_ex(regs->cs, &sc->cs);
169 put_user_ex(0, &sc->gs);
170 put_user_ex(0, &sc->fs);
171 #endif /* CONFIG_X86_32 */
173 put_user_ex(fpstate, &sc->fpstate);
175 /* non-iBCS2 extensions.. */
176 put_user_ex(mask, &sc->oldmask);
177 put_user_ex(current->thread.cr2, &sc->cr2);
178 } put_user_catch(err);
184 * Set up a signal frame.
188 * Determine which stack to use..
190 static unsigned long align_sigframe(unsigned long sp)
194 * Align the stack pointer according to the i386 ABI,
195 * i.e. so that on function entry ((sp + 4) & 15) == 0.
197 sp = ((sp + 4) & -16ul) - 4;
198 #else /* !CONFIG_X86_32 */
199 sp = round_down(sp, 16) - 8;
204 static inline void __user *
205 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
206 void __user **fpstate)
208 /* Default to using normal stack */
209 unsigned long math_size = 0;
210 unsigned long sp = regs->sp;
211 unsigned long buf_fx = 0;
212 int onsigstack = on_sig_stack(sp);
215 if (config_enabled(CONFIG_X86_64))
219 /* This is the X/Open sanctioned signal stack switching. */
220 if (ka->sa.sa_flags & SA_ONSTACK) {
221 if (current->sas_ss_size)
222 sp = current->sas_ss_sp + current->sas_ss_size;
223 } else if (config_enabled(CONFIG_X86_32) &&
224 (regs->ss & 0xffff) != __USER_DS &&
225 !(ka->sa.sa_flags & SA_RESTORER) &&
226 ka->sa.sa_restorer) {
227 /* This is the legacy signal stack switching. */
228 sp = (unsigned long) ka->sa.sa_restorer;
233 sp = alloc_mathframe(sp, config_enabled(CONFIG_X86_32),
234 &buf_fx, &math_size);
235 *fpstate = (void __user *)sp;
238 sp = align_sigframe(sp - frame_size);
241 * If we are on the alternate signal stack and would overflow it, don't.
242 * Return an always-bogus address instead so we will die with SIGSEGV.
244 if (onsigstack && !likely(on_sig_stack(sp)))
245 return (void __user *)-1L;
247 /* save i387 and extended state */
249 save_xstate_sig(*fpstate, (void __user *)buf_fx, math_size) < 0)
250 return (void __user *)-1L;
252 return (void __user *)sp;
256 static const struct {
260 } __attribute__((packed)) retcode = {
261 0xb858, /* popl %eax; movl $..., %eax */
263 0x80cd, /* int $0x80 */
266 static const struct {
271 } __attribute__((packed)) rt_retcode = {
272 0xb8, /* movl $..., %eax */
274 0x80cd, /* int $0x80 */
279 __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
280 struct pt_regs *regs)
282 struct sigframe __user *frame;
283 void __user *restorer;
285 void __user *fpstate = NULL;
287 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
289 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
292 if (__put_user(sig, &frame->sig))
295 if (setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]))
298 if (_NSIG_WORDS > 1) {
299 if (__copy_to_user(&frame->extramask, &set->sig[1],
300 sizeof(frame->extramask)))
304 if (current->mm->context.vdso)
305 restorer = VDSO32_SYMBOL(current->mm->context.vdso, sigreturn);
307 restorer = &frame->retcode;
308 if (ka->sa.sa_flags & SA_RESTORER)
309 restorer = ka->sa.sa_restorer;
311 /* Set up to return from userspace. */
312 err |= __put_user(restorer, &frame->pretcode);
315 * This is popl %eax ; movl $__NR_sigreturn, %eax ; int $0x80
317 * WE DO NOT USE IT ANY MORE! It's only left here for historical
318 * reasons and because gdb uses it as a signature to notice
319 * signal handler stack frames.
321 err |= __put_user(*((u64 *)&retcode), (u64 *)frame->retcode);
326 /* Set up registers for signal handler */
327 regs->sp = (unsigned long)frame;
328 regs->ip = (unsigned long)ka->sa.sa_handler;
329 regs->ax = (unsigned long)sig;
333 regs->ds = __USER_DS;
334 regs->es = __USER_DS;
335 regs->ss = __USER_DS;
336 regs->cs = __USER_CS;
341 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
342 sigset_t *set, struct pt_regs *regs)
344 struct rt_sigframe __user *frame;
345 void __user *restorer;
347 void __user *fpstate = NULL;
349 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
351 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
355 put_user_ex(sig, &frame->sig);
356 put_user_ex(&frame->info, &frame->pinfo);
357 put_user_ex(&frame->uc, &frame->puc);
358 err |= copy_siginfo_to_user(&frame->info, info);
360 /* Create the ucontext. */
362 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
364 put_user_ex(0, &frame->uc.uc_flags);
365 put_user_ex(0, &frame->uc.uc_link);
366 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
367 put_user_ex(sas_ss_flags(regs->sp),
368 &frame->uc.uc_stack.ss_flags);
369 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
370 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
372 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
374 /* Set up to return from userspace. */
375 restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
376 if (ka->sa.sa_flags & SA_RESTORER)
377 restorer = ka->sa.sa_restorer;
378 put_user_ex(restorer, &frame->pretcode);
381 * This is movl $__NR_rt_sigreturn, %ax ; int $0x80
383 * WE DO NOT USE IT ANY MORE! It's only left here for historical
384 * reasons and because gdb uses it as a signature to notice
385 * signal handler stack frames.
387 put_user_ex(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
388 } put_user_catch(err);
393 /* Set up registers for signal handler */
394 regs->sp = (unsigned long)frame;
395 regs->ip = (unsigned long)ka->sa.sa_handler;
396 regs->ax = (unsigned long)sig;
397 regs->dx = (unsigned long)&frame->info;
398 regs->cx = (unsigned long)&frame->uc;
400 regs->ds = __USER_DS;
401 regs->es = __USER_DS;
402 regs->ss = __USER_DS;
403 regs->cs = __USER_CS;
407 #else /* !CONFIG_X86_32 */
408 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
409 sigset_t *set, struct pt_regs *regs)
411 struct rt_sigframe __user *frame;
412 void __user *fp = NULL;
414 struct task_struct *me = current;
416 frame = get_sigframe(ka, regs, sizeof(struct rt_sigframe), &fp);
418 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
421 if (ka->sa.sa_flags & SA_SIGINFO) {
422 if (copy_siginfo_to_user(&frame->info, info))
427 /* Create the ucontext. */
429 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
431 put_user_ex(0, &frame->uc.uc_flags);
432 put_user_ex(0, &frame->uc.uc_link);
433 put_user_ex(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
434 put_user_ex(sas_ss_flags(regs->sp),
435 &frame->uc.uc_stack.ss_flags);
436 put_user_ex(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
437 err |= setup_sigcontext(&frame->uc.uc_mcontext, fp, regs, set->sig[0]);
438 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
440 /* Set up to return from userspace. If provided, use a stub
441 already in userspace. */
442 /* x86-64 should always use SA_RESTORER. */
443 if (ka->sa.sa_flags & SA_RESTORER) {
444 put_user_ex(ka->sa.sa_restorer, &frame->pretcode);
446 /* could use a vstub here */
449 } put_user_catch(err);
454 /* Set up registers for signal handler */
456 /* In case the signal handler was declared without prototypes */
459 /* This also works for non SA_SIGINFO handlers because they expect the
460 next argument after the signal number on the stack. */
461 regs->si = (unsigned long)&frame->info;
462 regs->dx = (unsigned long)&frame->uc;
463 regs->ip = (unsigned long) ka->sa.sa_handler;
465 regs->sp = (unsigned long)frame;
467 /* Set up the CS register to run signal handlers in 64-bit mode,
468 even if the handler happens to be interrupting 32-bit code. */
469 regs->cs = __USER_CS;
473 #endif /* CONFIG_X86_32 */
475 static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
476 siginfo_t *info, compat_sigset_t *set,
477 struct pt_regs *regs)
479 #ifdef CONFIG_X86_X32_ABI
480 struct rt_sigframe_x32 __user *frame;
481 void __user *restorer;
483 void __user *fpstate = NULL;
485 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
487 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
490 if (ka->sa.sa_flags & SA_SIGINFO) {
491 if (copy_siginfo_to_user32(&frame->info, info))
496 /* Create the ucontext. */
498 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
500 put_user_ex(0, &frame->uc.uc_flags);
501 put_user_ex(0, &frame->uc.uc_link);
502 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
503 put_user_ex(sas_ss_flags(regs->sp),
504 &frame->uc.uc_stack.ss_flags);
505 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
506 put_user_ex(0, &frame->uc.uc__pad0);
507 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
509 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
511 if (ka->sa.sa_flags & SA_RESTORER) {
512 restorer = ka->sa.sa_restorer;
514 /* could use a vstub here */
518 put_user_ex(restorer, &frame->pretcode);
519 } put_user_catch(err);
524 /* Set up registers for signal handler */
525 regs->sp = (unsigned long) frame;
526 regs->ip = (unsigned long) ka->sa.sa_handler;
528 /* We use the x32 calling convention here... */
530 regs->si = (unsigned long) &frame->info;
531 regs->dx = (unsigned long) &frame->uc;
533 loadsegment(ds, __USER_DS);
534 loadsegment(es, __USER_DS);
536 regs->cs = __USER_CS;
537 regs->ss = __USER_DS;
538 #endif /* CONFIG_X86_X32_ABI */
545 * Atomically swap in the new signal mask, and wait for a signal.
548 sys_sigsuspend(int history0, int history1, old_sigset_t mask)
551 siginitset(&blocked, mask);
552 return sigsuspend(&blocked);
556 sys_sigaction(int sig, const struct old_sigaction __user *act,
557 struct old_sigaction __user *oact)
559 struct k_sigaction new_ka, old_ka;
565 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
569 get_user_ex(new_ka.sa.sa_handler, &act->sa_handler);
570 get_user_ex(new_ka.sa.sa_flags, &act->sa_flags);
571 get_user_ex(mask, &act->sa_mask);
572 get_user_ex(new_ka.sa.sa_restorer, &act->sa_restorer);
573 } get_user_catch(ret);
577 siginitset(&new_ka.sa.sa_mask, mask);
580 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
583 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
587 put_user_ex(old_ka.sa.sa_handler, &oact->sa_handler);
588 put_user_ex(old_ka.sa.sa_flags, &oact->sa_flags);
589 put_user_ex(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
590 put_user_ex(old_ka.sa.sa_restorer, &oact->sa_restorer);
591 } put_user_catch(ret);
599 #endif /* CONFIG_X86_32 */
602 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
603 struct pt_regs *regs)
605 return do_sigaltstack(uss, uoss, regs->sp);
609 * Do a signal return; undo the signal stack.
612 unsigned long sys_sigreturn(struct pt_regs *regs)
614 struct sigframe __user *frame;
618 frame = (struct sigframe __user *)(regs->sp - 8);
620 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
622 if (__get_user(set.sig[0], &frame->sc.oldmask) || (_NSIG_WORDS > 1
623 && __copy_from_user(&set.sig[1], &frame->extramask,
624 sizeof(frame->extramask))))
627 set_current_blocked(&set);
629 if (restore_sigcontext(regs, &frame->sc, &ax))
634 signal_fault(regs, frame, "sigreturn");
638 #endif /* CONFIG_X86_32 */
640 long sys_rt_sigreturn(struct pt_regs *regs)
642 struct rt_sigframe __user *frame;
646 frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
647 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
649 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
652 set_current_blocked(&set);
654 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
657 if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
663 signal_fault(regs, frame, "rt_sigreturn");
668 * OK, we're invoking a handler:
670 static int signr_convert(int sig)
673 struct thread_info *info = current_thread_info();
675 if (info->exec_domain && info->exec_domain->signal_invmap && sig < 32)
676 return info->exec_domain->signal_invmap[sig];
677 #endif /* CONFIG_X86_32 */
682 setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
683 struct pt_regs *regs)
685 int usig = signr_convert(sig);
686 sigset_t *set = sigmask_to_save();
687 compat_sigset_t *cset = (compat_sigset_t *) set;
689 /* Set up the stack frame */
690 if (is_ia32_frame()) {
691 if (ka->sa.sa_flags & SA_SIGINFO)
692 return ia32_setup_rt_frame(usig, ka, info, cset, regs);
694 return ia32_setup_frame(usig, ka, cset, regs);
695 } else if (is_x32_frame()) {
696 return x32_setup_rt_frame(usig, ka, info, cset, regs);
698 return __setup_rt_frame(sig, ka, info, set, regs);
703 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
704 struct pt_regs *regs)
706 /* Are we from a system call? */
707 if (syscall_get_nr(current, regs) >= 0) {
708 /* If so, check system call restarting.. */
709 switch (syscall_get_error(current, regs)) {
710 case -ERESTART_RESTARTBLOCK:
711 case -ERESTARTNOHAND:
716 if (!(ka->sa.sa_flags & SA_RESTART)) {
721 case -ERESTARTNOINTR:
722 regs->ax = regs->orig_ax;
729 * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
730 * flag so that register information in the sigcontext is correct.
732 if (unlikely(regs->flags & X86_EFLAGS_TF) &&
733 likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
734 regs->flags &= ~X86_EFLAGS_TF;
736 if (setup_rt_frame(sig, ka, info, regs) < 0) {
737 force_sigsegv(sig, current);
742 * Clear the direction flag as per the ABI for function entry.
744 regs->flags &= ~X86_EFLAGS_DF;
747 * Clear TF when entering the signal handler, but
748 * notify any tracer that was single-stepping it.
749 * The tracer may want to single-step inside the
752 regs->flags &= ~X86_EFLAGS_TF;
754 signal_delivered(sig, info, ka, regs,
755 test_thread_flag(TIF_SINGLESTEP));
759 #define NR_restart_syscall __NR_restart_syscall
760 #else /* !CONFIG_X86_32 */
761 #define NR_restart_syscall \
762 test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
763 #endif /* CONFIG_X86_32 */
766 * Note that 'init' is a special process: it doesn't get signals it doesn't
767 * want to handle. Thus you cannot kill init even with a SIGKILL even by
770 static void do_signal(struct pt_regs *regs)
772 struct k_sigaction ka;
776 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
778 /* Whee! Actually deliver the signal. */
779 handle_signal(signr, &info, &ka, regs);
783 /* Did we come from a system call? */
784 if (syscall_get_nr(current, regs) >= 0) {
785 /* Restart the system call - no handlers present */
786 switch (syscall_get_error(current, regs)) {
787 case -ERESTARTNOHAND:
789 case -ERESTARTNOINTR:
790 regs->ax = regs->orig_ax;
794 case -ERESTART_RESTARTBLOCK:
795 regs->ax = NR_restart_syscall;
802 * If there's no signal to deliver, we just put the saved sigmask
805 restore_saved_sigmask();
809 * notification of userspace execution resumption
810 * - triggered by the TIF_WORK_MASK flags
813 do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
817 #ifdef CONFIG_X86_MCE
818 /* notify userspace of pending MCEs */
819 if (thread_info_flags & _TIF_MCE_NOTIFY)
820 mce_notify_process();
821 #endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
823 if (thread_info_flags & _TIF_UPROBE) {
824 clear_thread_flag(TIF_UPROBE);
825 uprobe_notify_resume(regs);
828 /* deal with pending signal delivery */
829 if (thread_info_flags & _TIF_SIGPENDING)
832 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
833 clear_thread_flag(TIF_NOTIFY_RESUME);
834 tracehook_notify_resume(regs);
836 if (thread_info_flags & _TIF_USER_RETURN_NOTIFY)
837 fire_user_return_notifiers();
840 clear_thread_flag(TIF_IRET);
841 #endif /* CONFIG_X86_32 */
846 void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
848 struct task_struct *me = current;
850 if (show_unhandled_signals && printk_ratelimit()) {
852 "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
853 task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
854 me->comm, me->pid, where, frame,
855 regs->ip, regs->sp, regs->orig_ax);
856 print_vma_addr(" in ", regs->ip);
860 force_sig(SIGSEGV, me);
863 #ifdef CONFIG_X86_X32_ABI
864 asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
866 struct rt_sigframe_x32 __user *frame;
869 struct pt_regs tregs;
871 frame = (struct rt_sigframe_x32 __user *)(regs->sp - 8);
873 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
875 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
878 set_current_blocked(&set);
880 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
884 if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
890 signal_fault(regs, frame, "x32 rt_sigreturn");