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);
118 get_user_ex(*pax, &sc->ax);
119 } get_user_catch(err);
121 err |= restore_i387_xstate(buf);
126 int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
127 struct pt_regs *regs, unsigned long mask)
134 put_user_ex(get_user_gs(regs), (unsigned int __user *)&sc->gs);
135 put_user_ex(regs->fs, (unsigned int __user *)&sc->fs);
136 put_user_ex(regs->es, (unsigned int __user *)&sc->es);
137 put_user_ex(regs->ds, (unsigned int __user *)&sc->ds);
138 #endif /* CONFIG_X86_32 */
140 put_user_ex(regs->di, &sc->di);
141 put_user_ex(regs->si, &sc->si);
142 put_user_ex(regs->bp, &sc->bp);
143 put_user_ex(regs->sp, &sc->sp);
144 put_user_ex(regs->bx, &sc->bx);
145 put_user_ex(regs->dx, &sc->dx);
146 put_user_ex(regs->cx, &sc->cx);
147 put_user_ex(regs->ax, &sc->ax);
149 put_user_ex(regs->r8, &sc->r8);
150 put_user_ex(regs->r9, &sc->r9);
151 put_user_ex(regs->r10, &sc->r10);
152 put_user_ex(regs->r11, &sc->r11);
153 put_user_ex(regs->r12, &sc->r12);
154 put_user_ex(regs->r13, &sc->r13);
155 put_user_ex(regs->r14, &sc->r14);
156 put_user_ex(regs->r15, &sc->r15);
157 #endif /* CONFIG_X86_64 */
159 put_user_ex(current->thread.trap_nr, &sc->trapno);
160 put_user_ex(current->thread.error_code, &sc->err);
161 put_user_ex(regs->ip, &sc->ip);
163 put_user_ex(regs->cs, (unsigned int __user *)&sc->cs);
164 put_user_ex(regs->flags, &sc->flags);
165 put_user_ex(regs->sp, &sc->sp_at_signal);
166 put_user_ex(regs->ss, (unsigned int __user *)&sc->ss);
167 #else /* !CONFIG_X86_32 */
168 put_user_ex(regs->flags, &sc->flags);
169 put_user_ex(regs->cs, &sc->cs);
170 put_user_ex(0, &sc->gs);
171 put_user_ex(0, &sc->fs);
172 #endif /* CONFIG_X86_32 */
174 put_user_ex(fpstate, &sc->fpstate);
176 /* non-iBCS2 extensions.. */
177 put_user_ex(mask, &sc->oldmask);
178 put_user_ex(current->thread.cr2, &sc->cr2);
179 } put_user_catch(err);
185 * Set up a signal frame.
189 * Determine which stack to use..
191 static unsigned long align_sigframe(unsigned long sp)
195 * Align the stack pointer according to the i386 ABI,
196 * i.e. so that on function entry ((sp + 4) & 15) == 0.
198 sp = ((sp + 4) & -16ul) - 4;
199 #else /* !CONFIG_X86_32 */
200 sp = round_down(sp, 16) - 8;
205 static inline void __user *
206 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
207 void __user **fpstate)
209 /* Default to using normal stack */
210 unsigned long sp = regs->sp;
211 int onsigstack = on_sig_stack(sp);
216 #endif /* 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;
225 /* This is the legacy signal stack switching. */
226 if ((regs->ss & 0xffff) != __USER_DS &&
227 !(ka->sa.sa_flags & SA_RESTORER) &&
229 sp = (unsigned long) ka->sa.sa_restorer;
230 #endif /* CONFIG_X86_32 */
235 sp -= sig_xstate_size;
237 sp = round_down(sp, 64);
238 #endif /* CONFIG_X86_64 */
239 *fpstate = (void __user *)sp;
242 sp = align_sigframe(sp - frame_size);
245 * If we are on the alternate signal stack and would overflow it, don't.
246 * Return an always-bogus address instead so we will die with SIGSEGV.
248 if (onsigstack && !likely(on_sig_stack(sp)))
249 return (void __user *)-1L;
251 /* save i387 state */
252 if (used_math() && save_i387_xstate(*fpstate) < 0)
253 return (void __user *)-1L;
255 return (void __user *)sp;
259 static const struct {
263 } __attribute__((packed)) retcode = {
264 0xb858, /* popl %eax; movl $..., %eax */
266 0x80cd, /* int $0x80 */
269 static const struct {
274 } __attribute__((packed)) rt_retcode = {
275 0xb8, /* movl $..., %eax */
277 0x80cd, /* int $0x80 */
282 __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
283 struct pt_regs *regs)
285 struct sigframe __user *frame;
286 void __user *restorer;
288 void __user *fpstate = NULL;
290 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
292 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
295 if (__put_user(sig, &frame->sig))
298 if (setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]))
301 if (_NSIG_WORDS > 1) {
302 if (__copy_to_user(&frame->extramask, &set->sig[1],
303 sizeof(frame->extramask)))
307 if (current->mm->context.vdso)
308 restorer = VDSO32_SYMBOL(current->mm->context.vdso, sigreturn);
310 restorer = &frame->retcode;
311 if (ka->sa.sa_flags & SA_RESTORER)
312 restorer = ka->sa.sa_restorer;
314 /* Set up to return from userspace. */
315 err |= __put_user(restorer, &frame->pretcode);
318 * This is popl %eax ; movl $__NR_sigreturn, %eax ; int $0x80
320 * WE DO NOT USE IT ANY MORE! It's only left here for historical
321 * reasons and because gdb uses it as a signature to notice
322 * signal handler stack frames.
324 err |= __put_user(*((u64 *)&retcode), (u64 *)frame->retcode);
329 /* Set up registers for signal handler */
330 regs->sp = (unsigned long)frame;
331 regs->ip = (unsigned long)ka->sa.sa_handler;
332 regs->ax = (unsigned long)sig;
336 regs->ds = __USER_DS;
337 regs->es = __USER_DS;
338 regs->ss = __USER_DS;
339 regs->cs = __USER_CS;
344 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
345 sigset_t *set, struct pt_regs *regs)
347 struct rt_sigframe __user *frame;
348 void __user *restorer;
350 void __user *fpstate = NULL;
352 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
354 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
358 put_user_ex(sig, &frame->sig);
359 put_user_ex(&frame->info, &frame->pinfo);
360 put_user_ex(&frame->uc, &frame->puc);
362 /* Create the ucontext. */
364 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
366 put_user_ex(0, &frame->uc.uc_flags);
367 put_user_ex(0, &frame->uc.uc_link);
368 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
369 put_user_ex(sas_ss_flags(regs->sp),
370 &frame->uc.uc_stack.ss_flags);
371 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
373 /* Set up to return from userspace. */
374 restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
375 if (ka->sa.sa_flags & SA_RESTORER)
376 restorer = ka->sa.sa_restorer;
377 put_user_ex(restorer, &frame->pretcode);
380 * This is movl $__NR_rt_sigreturn, %ax ; int $0x80
382 * WE DO NOT USE IT ANY MORE! It's only left here for historical
383 * reasons and because gdb uses it as a signature to notice
384 * signal handler stack frames.
386 put_user_ex(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
387 } put_user_catch(err);
389 err |= copy_siginfo_to_user(&frame->info, info);
390 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
392 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
397 /* Set up registers for signal handler */
398 regs->sp = (unsigned long)frame;
399 regs->ip = (unsigned long)ka->sa.sa_handler;
400 regs->ax = (unsigned long)sig;
401 regs->dx = (unsigned long)&frame->info;
402 regs->cx = (unsigned long)&frame->uc;
404 regs->ds = __USER_DS;
405 regs->es = __USER_DS;
406 regs->ss = __USER_DS;
407 regs->cs = __USER_CS;
411 #else /* !CONFIG_X86_32 */
412 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
413 sigset_t *set, struct pt_regs *regs)
415 struct rt_sigframe __user *frame;
416 void __user *fp = NULL;
418 struct task_struct *me = current;
420 frame = get_sigframe(ka, regs, sizeof(struct rt_sigframe), &fp);
422 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
425 if (ka->sa.sa_flags & SA_SIGINFO) {
426 if (copy_siginfo_to_user(&frame->info, info))
431 /* Create the ucontext. */
433 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
435 put_user_ex(0, &frame->uc.uc_flags);
436 put_user_ex(0, &frame->uc.uc_link);
437 put_user_ex(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
438 put_user_ex(sas_ss_flags(regs->sp),
439 &frame->uc.uc_stack.ss_flags);
440 put_user_ex(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
442 /* Set up to return from userspace. If provided, use a stub
443 already in userspace. */
444 /* x86-64 should always use SA_RESTORER. */
445 if (ka->sa.sa_flags & SA_RESTORER) {
446 put_user_ex(ka->sa.sa_restorer, &frame->pretcode);
448 /* could use a vstub here */
451 } put_user_catch(err);
453 err |= setup_sigcontext(&frame->uc.uc_mcontext, fp, regs, set->sig[0]);
454 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
459 /* Set up registers for signal handler */
461 /* In case the signal handler was declared without prototypes */
464 /* This also works for non SA_SIGINFO handlers because they expect the
465 next argument after the signal number on the stack. */
466 regs->si = (unsigned long)&frame->info;
467 regs->dx = (unsigned long)&frame->uc;
468 regs->ip = (unsigned long) ka->sa.sa_handler;
470 regs->sp = (unsigned long)frame;
472 /* Set up the CS register to run signal handlers in 64-bit mode,
473 even if the handler happens to be interrupting 32-bit code. */
474 regs->cs = __USER_CS;
478 #endif /* CONFIG_X86_32 */
482 * Atomically swap in the new signal mask, and wait for a signal.
485 sys_sigsuspend(int history0, int history1, old_sigset_t mask)
488 siginitset(&blocked, mask);
489 return sigsuspend(&blocked);
493 sys_sigaction(int sig, const struct old_sigaction __user *act,
494 struct old_sigaction __user *oact)
496 struct k_sigaction new_ka, old_ka;
502 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
506 get_user_ex(new_ka.sa.sa_handler, &act->sa_handler);
507 get_user_ex(new_ka.sa.sa_flags, &act->sa_flags);
508 get_user_ex(mask, &act->sa_mask);
509 get_user_ex(new_ka.sa.sa_restorer, &act->sa_restorer);
510 } get_user_catch(ret);
514 siginitset(&new_ka.sa.sa_mask, mask);
517 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
520 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
524 put_user_ex(old_ka.sa.sa_handler, &oact->sa_handler);
525 put_user_ex(old_ka.sa.sa_flags, &oact->sa_flags);
526 put_user_ex(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
527 put_user_ex(old_ka.sa.sa_restorer, &oact->sa_restorer);
528 } put_user_catch(ret);
536 #endif /* CONFIG_X86_32 */
539 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
540 struct pt_regs *regs)
542 return do_sigaltstack(uss, uoss, regs->sp);
546 * Do a signal return; undo the signal stack.
549 unsigned long sys_sigreturn(struct pt_regs *regs)
551 struct sigframe __user *frame;
555 frame = (struct sigframe __user *)(regs->sp - 8);
557 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
559 if (__get_user(set.sig[0], &frame->sc.oldmask) || (_NSIG_WORDS > 1
560 && __copy_from_user(&set.sig[1], &frame->extramask,
561 sizeof(frame->extramask))))
564 set_current_blocked(&set);
566 if (restore_sigcontext(regs, &frame->sc, &ax))
571 signal_fault(regs, frame, "sigreturn");
575 #endif /* CONFIG_X86_32 */
577 long sys_rt_sigreturn(struct pt_regs *regs)
579 struct rt_sigframe __user *frame;
583 frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
584 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
586 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
589 set_current_blocked(&set);
591 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
594 if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
600 signal_fault(regs, frame, "rt_sigreturn");
605 * OK, we're invoking a handler:
607 static int signr_convert(int sig)
610 struct thread_info *info = current_thread_info();
612 if (info->exec_domain && info->exec_domain->signal_invmap && sig < 32)
613 return info->exec_domain->signal_invmap[sig];
614 #endif /* CONFIG_X86_32 */
621 #define ia32_setup_frame __setup_frame
622 #define ia32_setup_rt_frame __setup_rt_frame
624 #else /* !CONFIG_X86_32 */
626 #ifdef CONFIG_IA32_EMULATION
627 #define is_ia32 test_thread_flag(TIF_IA32)
628 #else /* !CONFIG_IA32_EMULATION */
630 #endif /* CONFIG_IA32_EMULATION */
632 #ifdef CONFIG_X86_X32_ABI
633 #define is_x32 test_thread_flag(TIF_X32)
635 static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
636 siginfo_t *info, compat_sigset_t *set,
637 struct pt_regs *regs);
638 #else /* !CONFIG_X86_X32_ABI */
640 #endif /* CONFIG_X86_X32_ABI */
642 int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
643 sigset_t *set, struct pt_regs *regs);
644 int ia32_setup_frame(int sig, struct k_sigaction *ka,
645 sigset_t *set, struct pt_regs *regs);
647 #endif /* CONFIG_X86_32 */
650 setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
651 struct pt_regs *regs)
653 int usig = signr_convert(sig);
654 sigset_t *set = sigmask_to_save();
656 /* Set up the stack frame */
658 if (ka->sa.sa_flags & SA_SIGINFO)
659 return ia32_setup_rt_frame(usig, ka, info, set, regs);
661 return ia32_setup_frame(usig, ka, set, regs);
662 #ifdef CONFIG_X86_X32_ABI
664 return x32_setup_rt_frame(usig, ka, info,
665 (compat_sigset_t *)set, regs);
668 return __setup_rt_frame(sig, ka, info, set, regs);
673 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
674 struct pt_regs *regs)
676 /* Are we from a system call? */
677 if (syscall_get_nr(current, regs) >= 0) {
678 /* If so, check system call restarting.. */
679 switch (syscall_get_error(current, regs)) {
680 case -ERESTART_RESTARTBLOCK:
681 case -ERESTARTNOHAND:
686 if (!(ka->sa.sa_flags & SA_RESTART)) {
691 case -ERESTARTNOINTR:
692 regs->ax = regs->orig_ax;
699 * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
700 * flag so that register information in the sigcontext is correct.
702 if (unlikely(regs->flags & X86_EFLAGS_TF) &&
703 likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
704 regs->flags &= ~X86_EFLAGS_TF;
706 if (setup_rt_frame(sig, ka, info, regs) < 0) {
707 force_sigsegv(sig, current);
712 * Clear the direction flag as per the ABI for function entry.
714 regs->flags &= ~X86_EFLAGS_DF;
717 * Clear TF when entering the signal handler, but
718 * notify any tracer that was single-stepping it.
719 * The tracer may want to single-step inside the
722 regs->flags &= ~X86_EFLAGS_TF;
724 signal_delivered(sig, info, ka, regs,
725 test_thread_flag(TIF_SINGLESTEP));
729 #define NR_restart_syscall __NR_restart_syscall
730 #else /* !CONFIG_X86_32 */
731 #define NR_restart_syscall \
732 test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
733 #endif /* CONFIG_X86_32 */
736 * Note that 'init' is a special process: it doesn't get signals it doesn't
737 * want to handle. Thus you cannot kill init even with a SIGKILL even by
740 static void do_signal(struct pt_regs *regs)
742 struct k_sigaction ka;
746 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
748 /* Whee! Actually deliver the signal. */
749 handle_signal(signr, &info, &ka, regs);
753 /* Did we come from a system call? */
754 if (syscall_get_nr(current, regs) >= 0) {
755 /* Restart the system call - no handlers present */
756 switch (syscall_get_error(current, regs)) {
757 case -ERESTARTNOHAND:
759 case -ERESTARTNOINTR:
760 regs->ax = regs->orig_ax;
764 case -ERESTART_RESTARTBLOCK:
765 regs->ax = NR_restart_syscall;
772 * If there's no signal to deliver, we just put the saved sigmask
775 restore_saved_sigmask();
779 * notification of userspace execution resumption
780 * - triggered by the TIF_WORK_MASK flags
783 do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
785 #ifdef CONFIG_X86_MCE
786 /* notify userspace of pending MCEs */
787 if (thread_info_flags & _TIF_MCE_NOTIFY)
788 mce_notify_process();
789 #endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
791 if (thread_info_flags & _TIF_UPROBE) {
792 clear_thread_flag(TIF_UPROBE);
793 uprobe_notify_resume(regs);
796 /* deal with pending signal delivery */
797 if (thread_info_flags & _TIF_SIGPENDING)
800 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
801 clear_thread_flag(TIF_NOTIFY_RESUME);
802 tracehook_notify_resume(regs);
804 if (thread_info_flags & _TIF_USER_RETURN_NOTIFY)
805 fire_user_return_notifiers();
808 clear_thread_flag(TIF_IRET);
809 #endif /* CONFIG_X86_32 */
812 void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
814 struct task_struct *me = current;
816 if (show_unhandled_signals && printk_ratelimit()) {
818 "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
819 task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
820 me->comm, me->pid, where, frame,
821 regs->ip, regs->sp, regs->orig_ax);
822 print_vma_addr(" in ", regs->ip);
826 force_sig(SIGSEGV, me);
829 #ifdef CONFIG_X86_X32_ABI
830 static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
831 siginfo_t *info, compat_sigset_t *set,
832 struct pt_regs *regs)
834 struct rt_sigframe_x32 __user *frame;
835 void __user *restorer;
837 void __user *fpstate = NULL;
839 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
841 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
844 if (ka->sa.sa_flags & SA_SIGINFO) {
845 if (copy_siginfo_to_user32(&frame->info, info))
850 /* Create the ucontext. */
852 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
854 put_user_ex(0, &frame->uc.uc_flags);
855 put_user_ex(0, &frame->uc.uc_link);
856 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
857 put_user_ex(sas_ss_flags(regs->sp),
858 &frame->uc.uc_stack.ss_flags);
859 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
860 put_user_ex(0, &frame->uc.uc__pad0);
862 if (ka->sa.sa_flags & SA_RESTORER) {
863 restorer = ka->sa.sa_restorer;
865 /* could use a vstub here */
869 put_user_ex(restorer, &frame->pretcode);
870 } put_user_catch(err);
872 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
874 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
879 /* Set up registers for signal handler */
880 regs->sp = (unsigned long) frame;
881 regs->ip = (unsigned long) ka->sa.sa_handler;
883 /* We use the x32 calling convention here... */
885 regs->si = (unsigned long) &frame->info;
886 regs->dx = (unsigned long) &frame->uc;
888 loadsegment(ds, __USER_DS);
889 loadsegment(es, __USER_DS);
891 regs->cs = __USER_CS;
892 regs->ss = __USER_DS;
897 asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
899 struct rt_sigframe_x32 __user *frame;
902 struct pt_regs tregs;
904 frame = (struct rt_sigframe_x32 __user *)(regs->sp - 8);
906 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
908 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
911 set_current_blocked(&set);
913 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
917 if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
923 signal_fault(regs, frame, "x32 rt_sigreturn");