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
9 #include <linux/sched.h>
11 #include <linux/smp.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/wait.h>
15 #include <linux/tracehook.h>
16 #include <linux/unistd.h>
17 #include <linux/stddef.h>
18 #include <linux/personality.h>
19 #include <linux/uaccess.h>
20 #include <linux/user-return-notifier.h>
22 #include <asm/processor.h>
23 #include <asm/ucontext.h>
27 #include <asm/sighandling.h>
30 #include <asm/proto.h>
31 #include <asm/ia32_unistd.h>
32 #include <asm/sys_ia32.h>
33 #endif /* CONFIG_X86_64 */
35 #include <asm/syscall.h>
36 #include <asm/syscalls.h>
38 #include <asm/sigframe.h>
41 # define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF)
43 # define FIX_EFLAGS __FIX_EFLAGS
46 #define COPY(x) do { \
47 get_user_ex(regs->x, &sc->x); \
50 #define GET_SEG(seg) ({ \
52 get_user_ex(tmp, &sc->seg); \
56 #define COPY_SEG(seg) do { \
57 regs->seg = GET_SEG(seg); \
60 #define COPY_SEG_CPL3(seg) do { \
61 regs->seg = GET_SEG(seg) | 3; \
64 int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
68 unsigned int tmpflags;
71 /* Always make any pending restarted system calls return -EINTR */
72 current_thread_info()->restart_block.fn = do_no_restart_syscall;
77 set_user_gs(regs, GET_SEG(gs));
81 #endif /* CONFIG_X86_32 */
83 COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
84 COPY(dx); COPY(cx); COPY(ip);
95 #endif /* CONFIG_X86_64 */
100 #else /* !CONFIG_X86_32 */
101 /* Kernel saves and restores only the CS segment register on signals,
102 * which is the bare minimum needed to allow mixed 32/64-bit code.
103 * App's signal handler can save/restore other segments if needed. */
105 #endif /* CONFIG_X86_32 */
107 get_user_ex(tmpflags, &sc->flags);
108 regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
109 regs->orig_ax = -1; /* disable syscall checks */
111 get_user_ex(buf, &sc->fpstate);
112 err |= restore_i387_xstate(buf);
114 get_user_ex(*pax, &sc->ax);
115 } get_user_catch(err);
120 int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
121 struct pt_regs *regs, unsigned long mask)
128 put_user_ex(get_user_gs(regs), (unsigned int __user *)&sc->gs);
129 put_user_ex(regs->fs, (unsigned int __user *)&sc->fs);
130 put_user_ex(regs->es, (unsigned int __user *)&sc->es);
131 put_user_ex(regs->ds, (unsigned int __user *)&sc->ds);
132 #endif /* CONFIG_X86_32 */
134 put_user_ex(regs->di, &sc->di);
135 put_user_ex(regs->si, &sc->si);
136 put_user_ex(regs->bp, &sc->bp);
137 put_user_ex(regs->sp, &sc->sp);
138 put_user_ex(regs->bx, &sc->bx);
139 put_user_ex(regs->dx, &sc->dx);
140 put_user_ex(regs->cx, &sc->cx);
141 put_user_ex(regs->ax, &sc->ax);
143 put_user_ex(regs->r8, &sc->r8);
144 put_user_ex(regs->r9, &sc->r9);
145 put_user_ex(regs->r10, &sc->r10);
146 put_user_ex(regs->r11, &sc->r11);
147 put_user_ex(regs->r12, &sc->r12);
148 put_user_ex(regs->r13, &sc->r13);
149 put_user_ex(regs->r14, &sc->r14);
150 put_user_ex(regs->r15, &sc->r15);
151 #endif /* CONFIG_X86_64 */
153 put_user_ex(current->thread.trap_nr, &sc->trapno);
154 put_user_ex(current->thread.error_code, &sc->err);
155 put_user_ex(regs->ip, &sc->ip);
157 put_user_ex(regs->cs, (unsigned int __user *)&sc->cs);
158 put_user_ex(regs->flags, &sc->flags);
159 put_user_ex(regs->sp, &sc->sp_at_signal);
160 put_user_ex(regs->ss, (unsigned int __user *)&sc->ss);
161 #else /* !CONFIG_X86_32 */
162 put_user_ex(regs->flags, &sc->flags);
163 put_user_ex(regs->cs, &sc->cs);
164 put_user_ex(0, &sc->gs);
165 put_user_ex(0, &sc->fs);
166 #endif /* CONFIG_X86_32 */
168 put_user_ex(fpstate, &sc->fpstate);
170 /* non-iBCS2 extensions.. */
171 put_user_ex(mask, &sc->oldmask);
172 put_user_ex(current->thread.cr2, &sc->cr2);
173 } put_user_catch(err);
179 * Set up a signal frame.
183 * Determine which stack to use..
185 static unsigned long align_sigframe(unsigned long sp)
189 * Align the stack pointer according to the i386 ABI,
190 * i.e. so that on function entry ((sp + 4) & 15) == 0.
192 sp = ((sp + 4) & -16ul) - 4;
193 #else /* !CONFIG_X86_32 */
194 sp = round_down(sp, 16) - 8;
199 static inline void __user *
200 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
201 void __user **fpstate)
203 /* Default to using normal stack */
204 unsigned long sp = regs->sp;
205 int onsigstack = on_sig_stack(sp);
210 #endif /* CONFIG_X86_64 */
213 /* This is the X/Open sanctioned signal stack switching. */
214 if (ka->sa.sa_flags & SA_ONSTACK) {
215 if (current->sas_ss_size)
216 sp = current->sas_ss_sp + current->sas_ss_size;
219 /* This is the legacy signal stack switching. */
220 if ((regs->ss & 0xffff) != __USER_DS &&
221 !(ka->sa.sa_flags & SA_RESTORER) &&
223 sp = (unsigned long) ka->sa.sa_restorer;
224 #endif /* CONFIG_X86_32 */
229 sp -= sig_xstate_size;
231 sp = round_down(sp, 64);
232 #endif /* CONFIG_X86_64 */
233 *fpstate = (void __user *)sp;
236 sp = align_sigframe(sp - frame_size);
239 * If we are on the alternate signal stack and would overflow it, don't.
240 * Return an always-bogus address instead so we will die with SIGSEGV.
242 if (onsigstack && !likely(on_sig_stack(sp)))
243 return (void __user *)-1L;
245 /* save i387 state */
246 if (used_math() && save_i387_xstate(*fpstate) < 0)
247 return (void __user *)-1L;
249 return (void __user *)sp;
253 static const struct {
257 } __attribute__((packed)) retcode = {
258 0xb858, /* popl %eax; movl $..., %eax */
260 0x80cd, /* int $0x80 */
263 static const struct {
268 } __attribute__((packed)) rt_retcode = {
269 0xb8, /* movl $..., %eax */
271 0x80cd, /* int $0x80 */
276 __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
277 struct pt_regs *regs)
279 struct sigframe __user *frame;
280 void __user *restorer;
282 void __user *fpstate = NULL;
284 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
286 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
289 if (__put_user(sig, &frame->sig))
292 if (setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]))
295 if (_NSIG_WORDS > 1) {
296 if (__copy_to_user(&frame->extramask, &set->sig[1],
297 sizeof(frame->extramask)))
301 if (current->mm->context.vdso)
302 restorer = VDSO32_SYMBOL(current->mm->context.vdso, sigreturn);
304 restorer = &frame->retcode;
305 if (ka->sa.sa_flags & SA_RESTORER)
306 restorer = ka->sa.sa_restorer;
308 /* Set up to return from userspace. */
309 err |= __put_user(restorer, &frame->pretcode);
312 * This is popl %eax ; movl $__NR_sigreturn, %eax ; int $0x80
314 * WE DO NOT USE IT ANY MORE! It's only left here for historical
315 * reasons and because gdb uses it as a signature to notice
316 * signal handler stack frames.
318 err |= __put_user(*((u64 *)&retcode), (u64 *)frame->retcode);
323 /* Set up registers for signal handler */
324 regs->sp = (unsigned long)frame;
325 regs->ip = (unsigned long)ka->sa.sa_handler;
326 regs->ax = (unsigned long)sig;
330 regs->ds = __USER_DS;
331 regs->es = __USER_DS;
332 regs->ss = __USER_DS;
333 regs->cs = __USER_CS;
338 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
339 sigset_t *set, struct pt_regs *regs)
341 struct rt_sigframe __user *frame;
342 void __user *restorer;
344 void __user *fpstate = NULL;
346 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
348 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
352 put_user_ex(sig, &frame->sig);
353 put_user_ex(&frame->info, &frame->pinfo);
354 put_user_ex(&frame->uc, &frame->puc);
355 err |= copy_siginfo_to_user(&frame->info, info);
357 /* Create the ucontext. */
359 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
361 put_user_ex(0, &frame->uc.uc_flags);
362 put_user_ex(0, &frame->uc.uc_link);
363 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
364 put_user_ex(sas_ss_flags(regs->sp),
365 &frame->uc.uc_stack.ss_flags);
366 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
367 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
369 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
371 /* Set up to return from userspace. */
372 restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
373 if (ka->sa.sa_flags & SA_RESTORER)
374 restorer = ka->sa.sa_restorer;
375 put_user_ex(restorer, &frame->pretcode);
378 * This is movl $__NR_rt_sigreturn, %ax ; int $0x80
380 * WE DO NOT USE IT ANY MORE! It's only left here for historical
381 * reasons and because gdb uses it as a signature to notice
382 * signal handler stack frames.
384 put_user_ex(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
385 } put_user_catch(err);
390 /* Set up registers for signal handler */
391 regs->sp = (unsigned long)frame;
392 regs->ip = (unsigned long)ka->sa.sa_handler;
393 regs->ax = (unsigned long)sig;
394 regs->dx = (unsigned long)&frame->info;
395 regs->cx = (unsigned long)&frame->uc;
397 regs->ds = __USER_DS;
398 regs->es = __USER_DS;
399 regs->ss = __USER_DS;
400 regs->cs = __USER_CS;
404 #else /* !CONFIG_X86_32 */
405 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
406 sigset_t *set, struct pt_regs *regs)
408 struct rt_sigframe __user *frame;
409 void __user *fp = NULL;
411 struct task_struct *me = current;
413 frame = get_sigframe(ka, regs, sizeof(struct rt_sigframe), &fp);
415 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
418 if (ka->sa.sa_flags & SA_SIGINFO) {
419 if (copy_siginfo_to_user(&frame->info, info))
424 /* Create the ucontext. */
426 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
428 put_user_ex(0, &frame->uc.uc_flags);
429 put_user_ex(0, &frame->uc.uc_link);
430 put_user_ex(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
431 put_user_ex(sas_ss_flags(regs->sp),
432 &frame->uc.uc_stack.ss_flags);
433 put_user_ex(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
434 err |= setup_sigcontext(&frame->uc.uc_mcontext, fp, regs, set->sig[0]);
435 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
437 /* Set up to return from userspace. If provided, use a stub
438 already in userspace. */
439 /* x86-64 should always use SA_RESTORER. */
440 if (ka->sa.sa_flags & SA_RESTORER) {
441 put_user_ex(ka->sa.sa_restorer, &frame->pretcode);
443 /* could use a vstub here */
446 } put_user_catch(err);
451 /* Set up registers for signal handler */
453 /* In case the signal handler was declared without prototypes */
456 /* This also works for non SA_SIGINFO handlers because they expect the
457 next argument after the signal number on the stack. */
458 regs->si = (unsigned long)&frame->info;
459 regs->dx = (unsigned long)&frame->uc;
460 regs->ip = (unsigned long) ka->sa.sa_handler;
462 regs->sp = (unsigned long)frame;
464 /* Set up the CS register to run signal handlers in 64-bit mode,
465 even if the handler happens to be interrupting 32-bit code. */
466 regs->cs = __USER_CS;
470 #endif /* CONFIG_X86_32 */
474 * Atomically swap in the new signal mask, and wait for a signal.
477 sys_sigsuspend(int history0, int history1, old_sigset_t mask)
481 current->saved_sigmask = current->blocked;
484 siginitset(&blocked, mask);
485 set_current_blocked(&blocked);
487 current->state = TASK_INTERRUPTIBLE;
490 set_restore_sigmask();
491 return -ERESTARTNOHAND;
495 sys_sigaction(int sig, const struct old_sigaction __user *act,
496 struct old_sigaction __user *oact)
498 struct k_sigaction new_ka, old_ka;
504 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
508 get_user_ex(new_ka.sa.sa_handler, &act->sa_handler);
509 get_user_ex(new_ka.sa.sa_flags, &act->sa_flags);
510 get_user_ex(mask, &act->sa_mask);
511 get_user_ex(new_ka.sa.sa_restorer, &act->sa_restorer);
512 } get_user_catch(ret);
516 siginitset(&new_ka.sa.sa_mask, mask);
519 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
522 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
526 put_user_ex(old_ka.sa.sa_handler, &oact->sa_handler);
527 put_user_ex(old_ka.sa.sa_flags, &oact->sa_flags);
528 put_user_ex(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
529 put_user_ex(old_ka.sa.sa_restorer, &oact->sa_restorer);
530 } put_user_catch(ret);
538 #endif /* CONFIG_X86_32 */
541 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
542 struct pt_regs *regs)
544 return do_sigaltstack(uss, uoss, regs->sp);
548 * Do a signal return; undo the signal stack.
551 unsigned long sys_sigreturn(struct pt_regs *regs)
553 struct sigframe __user *frame;
557 frame = (struct sigframe __user *)(regs->sp - 8);
559 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
561 if (__get_user(set.sig[0], &frame->sc.oldmask) || (_NSIG_WORDS > 1
562 && __copy_from_user(&set.sig[1], &frame->extramask,
563 sizeof(frame->extramask))))
566 sigdelsetmask(&set, ~_BLOCKABLE);
567 set_current_blocked(&set);
569 if (restore_sigcontext(regs, &frame->sc, &ax))
574 signal_fault(regs, frame, "sigreturn");
578 #endif /* CONFIG_X86_32 */
580 long sys_rt_sigreturn(struct pt_regs *regs)
582 struct rt_sigframe __user *frame;
586 frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
587 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
589 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
592 sigdelsetmask(&set, ~_BLOCKABLE);
593 set_current_blocked(&set);
595 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
598 if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
604 signal_fault(regs, frame, "rt_sigreturn");
609 * OK, we're invoking a handler:
611 static int signr_convert(int sig)
614 struct thread_info *info = current_thread_info();
616 if (info->exec_domain && info->exec_domain->signal_invmap && sig < 32)
617 return info->exec_domain->signal_invmap[sig];
618 #endif /* CONFIG_X86_32 */
625 #define ia32_setup_frame __setup_frame
626 #define ia32_setup_rt_frame __setup_rt_frame
628 #else /* !CONFIG_X86_32 */
630 #ifdef CONFIG_IA32_EMULATION
631 #define is_ia32 test_thread_flag(TIF_IA32)
632 #else /* !CONFIG_IA32_EMULATION */
634 #endif /* CONFIG_IA32_EMULATION */
636 #ifdef CONFIG_X86_X32_ABI
637 #define is_x32 test_thread_flag(TIF_X32)
639 static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
640 siginfo_t *info, compat_sigset_t *set,
641 struct pt_regs *regs);
642 #else /* !CONFIG_X86_X32_ABI */
644 #endif /* CONFIG_X86_X32_ABI */
646 int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
647 sigset_t *set, struct pt_regs *regs);
648 int ia32_setup_frame(int sig, struct k_sigaction *ka,
649 sigset_t *set, struct pt_regs *regs);
651 #endif /* CONFIG_X86_32 */
654 setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
655 struct pt_regs *regs)
657 int usig = signr_convert(sig);
658 sigset_t *set = ¤t->blocked;
661 if (current_thread_info()->status & TS_RESTORE_SIGMASK)
662 set = ¤t->saved_sigmask;
664 /* Set up the stack frame */
666 if (ka->sa.sa_flags & SA_SIGINFO)
667 ret = ia32_setup_rt_frame(usig, ka, info, set, regs);
669 ret = ia32_setup_frame(usig, ka, set, regs);
670 #ifdef CONFIG_X86_X32_ABI
672 ret = x32_setup_rt_frame(usig, ka, info,
673 (compat_sigset_t *)set, regs);
676 ret = __setup_rt_frame(sig, ka, info, set, regs);
680 force_sigsegv(sig, current);
684 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
689 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
690 struct pt_regs *regs)
694 /* Are we from a system call? */
695 if (syscall_get_nr(current, regs) >= 0) {
696 /* If so, check system call restarting.. */
697 switch (syscall_get_error(current, regs)) {
698 case -ERESTART_RESTARTBLOCK:
699 case -ERESTARTNOHAND:
704 if (!(ka->sa.sa_flags & SA_RESTART)) {
709 case -ERESTARTNOINTR:
710 regs->ax = regs->orig_ax;
717 * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
718 * flag so that register information in the sigcontext is correct.
720 if (unlikely(regs->flags & X86_EFLAGS_TF) &&
721 likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
722 regs->flags &= ~X86_EFLAGS_TF;
724 ret = setup_rt_frame(sig, ka, info, regs);
730 * Clear the direction flag as per the ABI for function entry.
732 regs->flags &= ~X86_EFLAGS_DF;
735 * Clear TF when entering the signal handler, but
736 * notify any tracer that was single-stepping it.
737 * The tracer may want to single-step inside the
740 regs->flags &= ~X86_EFLAGS_TF;
742 block_sigmask(ka, sig);
744 tracehook_signal_handler(sig, info, ka, regs,
745 test_thread_flag(TIF_SINGLESTEP));
751 #define NR_restart_syscall __NR_restart_syscall
752 #else /* !CONFIG_X86_32 */
753 #define NR_restart_syscall \
754 test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
755 #endif /* CONFIG_X86_32 */
758 * Note that 'init' is a special process: it doesn't get signals it doesn't
759 * want to handle. Thus you cannot kill init even with a SIGKILL even by
762 static void do_signal(struct pt_regs *regs)
764 struct k_sigaction ka;
769 * We want the common case to go fast, which is why we may in certain
770 * cases get here from kernel mode. Just return without doing anything
772 * X86_32: vm86 regs switched out by assembly code before reaching
773 * here, so testing against kernel CS suffices.
775 if (!user_mode(regs))
778 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
780 /* Whee! Actually deliver the signal. */
781 handle_signal(signr, &info, &ka, regs);
785 /* Did we come from a system call? */
786 if (syscall_get_nr(current, regs) >= 0) {
787 /* Restart the system call - no handlers present */
788 switch (syscall_get_error(current, regs)) {
789 case -ERESTARTNOHAND:
791 case -ERESTARTNOINTR:
792 regs->ax = regs->orig_ax;
796 case -ERESTART_RESTARTBLOCK:
797 regs->ax = NR_restart_syscall;
804 * If there's no signal to deliver, we just put the saved sigmask
807 if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
808 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
809 set_current_blocked(¤t->saved_sigmask);
814 * notification of userspace execution resumption
815 * - triggered by the TIF_WORK_MASK flags
818 do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
820 #ifdef CONFIG_X86_MCE
821 /* notify userspace of pending MCEs */
822 if (thread_info_flags & _TIF_MCE_NOTIFY)
823 mce_notify_process();
824 #endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
826 /* deal with pending signal delivery */
827 if (thread_info_flags & _TIF_SIGPENDING)
830 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
831 clear_thread_flag(TIF_NOTIFY_RESUME);
832 tracehook_notify_resume(regs);
833 if (current->replacement_session_keyring)
834 key_replace_session_keyring();
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 */
844 void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
846 struct task_struct *me = current;
848 if (show_unhandled_signals && printk_ratelimit()) {
850 "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
851 task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
852 me->comm, me->pid, where, frame,
853 regs->ip, regs->sp, regs->orig_ax);
854 print_vma_addr(" in ", regs->ip);
855 printk(KERN_CONT "\n");
858 force_sig(SIGSEGV, me);
861 #ifdef CONFIG_X86_X32_ABI
862 static int x32_setup_rt_frame(int sig, struct k_sigaction *ka,
863 siginfo_t *info, compat_sigset_t *set,
864 struct pt_regs *regs)
866 struct rt_sigframe_x32 __user *frame;
867 void __user *restorer;
869 void __user *fpstate = NULL;
871 frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
873 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
876 if (ka->sa.sa_flags & SA_SIGINFO) {
877 if (copy_siginfo_to_user32(&frame->info, info))
882 /* Create the ucontext. */
884 put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
886 put_user_ex(0, &frame->uc.uc_flags);
887 put_user_ex(0, &frame->uc.uc_link);
888 put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
889 put_user_ex(sas_ss_flags(regs->sp),
890 &frame->uc.uc_stack.ss_flags);
891 put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
892 put_user_ex(0, &frame->uc.uc__pad0);
893 err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
895 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
897 if (ka->sa.sa_flags & SA_RESTORER) {
898 restorer = ka->sa.sa_restorer;
900 /* could use a vstub here */
904 put_user_ex(restorer, &frame->pretcode);
905 } put_user_catch(err);
910 /* Set up registers for signal handler */
911 regs->sp = (unsigned long) frame;
912 regs->ip = (unsigned long) ka->sa.sa_handler;
914 /* We use the x32 calling convention here... */
916 regs->si = (unsigned long) &frame->info;
917 regs->dx = (unsigned long) &frame->uc;
919 loadsegment(ds, __USER_DS);
920 loadsegment(es, __USER_DS);
922 regs->cs = __USER_CS;
923 regs->ss = __USER_DS;
928 asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
930 struct rt_sigframe_x32 __user *frame;
933 struct pt_regs tregs;
935 frame = (struct rt_sigframe_x32 __user *)(regs->sp - 8);
937 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
939 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
942 sigdelsetmask(&set, ~_BLOCKABLE);
943 set_current_blocked(&set);
945 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
949 if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
955 signal_fault(regs, frame, "x32 rt_sigreturn");