2 * arch/sh/kernel/signal_64.c
4 * Copyright (C) 2000, 2001 Paolo Alberelli
5 * Copyright (C) 2003 - 2008 Paul Mundt
6 * Copyright (C) 2004 Richard Curnow
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/rwsem.h>
13 #include <linux/sched.h>
15 #include <linux/smp.h>
16 #include <linux/kernel.h>
17 #include <linux/signal.h>
18 #include <linux/errno.h>
19 #include <linux/wait.h>
20 #include <linux/personality.h>
21 #include <linux/freezer.h>
22 #include <linux/ptrace.h>
23 #include <linux/unistd.h>
24 #include <linux/stddef.h>
25 #include <linux/tracehook.h>
26 #include <asm/ucontext.h>
27 #include <asm/uaccess.h>
28 #include <asm/pgtable.h>
29 #include <asm/cacheflush.h>
38 #define REF_REG_RET regs->regs[REG_RET]
39 #define REF_REG_SP regs->regs[REG_SP]
40 #define DEREF_REG_PR regs->regs[REG_PR]
44 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
47 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
48 sigset_t *oldset, struct pt_regs * regs);
51 handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa)
53 /* If we're not from a syscall, bail out */
54 if (regs->syscall_nr < 0)
57 /* check for system call restart.. */
58 switch (regs->regs[REG_RET]) {
59 case -ERESTART_RESTARTBLOCK:
61 no_system_call_restart:
62 regs->regs[REG_RET] = -EINTR;
66 if (!(sa->sa_flags & SA_RESTART))
67 goto no_system_call_restart;
70 /* Decode syscall # */
71 regs->regs[REG_RET] = regs->syscall_nr;
78 * Note that 'init' is a special process: it doesn't get signals it doesn't
79 * want to handle. Thus you cannot kill init even with a SIGKILL even by
82 * Note that we go through the signals twice: once to check the signals that
83 * the kernel can handle, and then we build all the user-level signal handling
84 * stack-frames in one go after that.
86 static int do_signal(struct pt_regs *regs, sigset_t *oldset)
90 struct k_sigaction ka;
93 * We want the common case to go fast, which
94 * is why we may in certain cases get here from
95 * kernel mode. Just return without doing anything
104 if (test_thread_flag(TIF_RESTORE_SIGMASK))
105 oldset = ¤t->saved_sigmask;
107 oldset = ¤t->blocked;
109 signr = get_signal_to_deliver(&info, &ka, regs, 0);
111 handle_syscall_restart(regs, &ka.sa);
113 /* Whee! Actually deliver the signal. */
114 if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
116 * If a signal was successfully delivered, the
117 * saved sigmask is in its frame, and we can
118 * clear the TIF_RESTORE_SIGMASK flag.
120 if (test_thread_flag(TIF_RESTORE_SIGMASK))
121 clear_thread_flag(TIF_RESTORE_SIGMASK);
123 tracehook_signal_handler(signr, &info, &ka, regs, 0);
129 /* Did we come from a system call? */
130 if (regs->syscall_nr >= 0) {
131 /* Restart the system call - no handlers present */
132 switch (regs->regs[REG_RET]) {
133 case -ERESTARTNOHAND:
135 case -ERESTARTNOINTR:
136 /* Decode Syscall # */
137 regs->regs[REG_RET] = regs->syscall_nr;
141 case -ERESTART_RESTARTBLOCK:
142 regs->regs[REG_RET] = __NR_restart_syscall;
148 /* No signal to deliver -- put the saved sigmask back */
149 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
150 clear_thread_flag(TIF_RESTORE_SIGMASK);
151 sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
158 * Atomically swap in the new signal mask, and wait for a signal.
161 sys_sigsuspend(old_sigset_t mask,
162 unsigned long r3, unsigned long r4, unsigned long r5,
163 unsigned long r6, unsigned long r7,
164 struct pt_regs * regs)
169 spin_lock_irq(¤t->sighand->siglock);
170 saveset = current->blocked;
171 siginitset(¤t->blocked, mask);
173 spin_unlock_irq(¤t->sighand->siglock);
175 REF_REG_RET = -EINTR;
177 current->state = TASK_INTERRUPTIBLE;
179 regs->pc += 4; /* because sys_sigreturn decrements the pc */
180 if (do_signal(regs, &saveset)) {
181 /* pc now points at signal handler. Need to decrement
182 it because entry.S will increment it. */
190 sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
191 unsigned long r4, unsigned long r5, unsigned long r6,
193 struct pt_regs * regs)
195 sigset_t saveset, newset;
197 /* XXX: Don't preclude handling different sized sigset_t's. */
198 if (sigsetsize != sizeof(sigset_t))
201 if (copy_from_user(&newset, unewset, sizeof(newset)))
203 sigdelsetmask(&newset, ~_BLOCKABLE);
204 spin_lock_irq(¤t->sighand->siglock);
205 saveset = current->blocked;
206 current->blocked = newset;
208 spin_unlock_irq(¤t->sighand->siglock);
210 REF_REG_RET = -EINTR;
212 current->state = TASK_INTERRUPTIBLE;
214 regs->pc += 4; /* because sys_sigreturn decrements the pc */
215 if (do_signal(regs, &saveset)) {
216 /* pc now points at signal handler. Need to decrement
217 it because entry.S will increment it. */
225 sys_sigaction(int sig, const struct old_sigaction __user *act,
226 struct old_sigaction __user *oact)
228 struct k_sigaction new_ka, old_ka;
233 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
234 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
235 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
237 __get_user(new_ka.sa.sa_flags, &act->sa_flags);
238 __get_user(mask, &act->sa_mask);
239 siginitset(&new_ka.sa.sa_mask, mask);
242 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
245 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
246 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
247 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
249 __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
250 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
257 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
258 unsigned long r4, unsigned long r5, unsigned long r6,
260 struct pt_regs * regs)
262 return do_sigaltstack(uss, uoss, REF_REG_SP);
266 * Do a signal return; undo the signal stack.
269 struct sigcontext sc;
270 unsigned long extramask[_NSIG_WORDS-1];
271 long long retcode[2];
275 struct siginfo __user *pinfo;
279 long long retcode[2];
284 restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc)
289 err |= __get_user (fpvalid, &sc->sc_fpvalid);
290 conditional_used_math(fpvalid);
294 if (current == last_task_used_math) {
295 last_task_used_math = NULL;
299 err |= __copy_from_user(¤t->thread.fpu.hard, &sc->sc_fpregs[0],
300 (sizeof(long long) * 32) + (sizeof(int) * 1));
306 setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc)
311 fpvalid = !!used_math();
312 err |= __put_user(fpvalid, &sc->sc_fpvalid);
316 if (current == last_task_used_math) {
318 save_fpu(current, regs);
320 last_task_used_math = NULL;
324 err |= __copy_to_user(&sc->sc_fpregs[0], ¤t->thread.fpu.hard,
325 (sizeof(long long) * 32) + (sizeof(int) * 1));
332 restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc)
337 setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc)
344 restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, long long *r2_p)
346 unsigned int err = 0;
347 unsigned long long current_sr, new_sr;
348 #define SR_MASK 0xffff8cfd
350 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
352 COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]);
353 COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]);
354 COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]);
355 COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]);
356 COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]);
357 COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]);
358 COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]);
359 COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]);
360 COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]);
361 COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]);
362 COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]);
363 COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]);
364 COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]);
365 COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]);
366 COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]);
367 COPY(regs[60]); COPY(regs[61]); COPY(regs[62]);
368 COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]);
369 COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]);
371 /* Prevent the signal handler manipulating SR in a way that can
372 crash the kernel. i.e. only allow S, Q, M, PR, SZ, FR to be
374 current_sr = regs->sr;
375 err |= __get_user(new_sr, &sc->sc_sr);
377 regs->sr |= (new_sr & ~SR_MASK);
383 /* Must do this last in case it sets regs->sr.fd (i.e. after rest of sr
384 * has been restored above.) */
385 err |= restore_sigcontext_fpu(regs, sc);
387 regs->syscall_nr = -1; /* disable syscall checks */
388 err |= __get_user(*r2_p, &sc->sc_regs[REG_RET]);
392 asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3,
393 unsigned long r4, unsigned long r5,
394 unsigned long r6, unsigned long r7,
395 struct pt_regs * regs)
397 struct sigframe __user *frame = (struct sigframe __user *) (long) REF_REG_SP;
401 /* Always make any pending restarted system calls return -EINTR */
402 current_thread_info()->restart_block.fn = do_no_restart_syscall;
404 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
407 if (__get_user(set.sig[0], &frame->sc.oldmask)
409 && __copy_from_user(&set.sig[1], &frame->extramask,
410 sizeof(frame->extramask))))
413 sigdelsetmask(&set, ~_BLOCKABLE);
415 spin_lock_irq(¤t->sighand->siglock);
416 current->blocked = set;
418 spin_unlock_irq(¤t->sighand->siglock);
420 if (restore_sigcontext(regs, &frame->sc, &ret))
427 force_sig(SIGSEGV, current);
431 asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3,
432 unsigned long r4, unsigned long r5,
433 unsigned long r6, unsigned long r7,
434 struct pt_regs * regs)
436 struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (long) REF_REG_SP;
441 /* Always make any pending restarted system calls return -EINTR */
442 current_thread_info()->restart_block.fn = do_no_restart_syscall;
444 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
447 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
450 sigdelsetmask(&set, ~_BLOCKABLE);
451 spin_lock_irq(¤t->sighand->siglock);
452 current->blocked = set;
454 spin_unlock_irq(¤t->sighand->siglock);
456 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret))
460 if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
462 /* It is more difficult to avoid calling this function than to
463 call it and ignore errors. */
464 do_sigaltstack(&st, NULL, REF_REG_SP);
469 force_sig(SIGSEGV, current);
474 * Set up a signal frame.
477 setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
482 /* Do this first, otherwise is this sets sr->fd, that value isn't preserved. */
483 err |= setup_sigcontext_fpu(regs, sc);
485 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
487 COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]);
488 COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]);
489 COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]);
490 COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]);
491 COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]);
492 COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]);
493 COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]);
494 COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]);
495 COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]);
496 COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]);
497 COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]);
498 COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]);
499 COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]);
500 COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]);
501 COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]);
502 COPY(regs[60]); COPY(regs[61]); COPY(regs[62]);
503 COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]);
504 COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]);
509 err |= __put_user(mask, &sc->oldmask);
515 * Determine which stack to use..
517 static inline void __user *
518 get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
520 if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
521 sp = current->sas_ss_sp + current->sas_ss_size;
523 return (void __user *)((sp - frame_size) & -8ul);
526 void sa_default_restorer(void); /* See comments below */
527 void sa_default_rt_restorer(void); /* See comments below */
529 static int setup_frame(int sig, struct k_sigaction *ka,
530 sigset_t *set, struct pt_regs *regs)
532 struct sigframe __user *frame;
536 frame = get_sigframe(ka, regs->regs[REG_SP], sizeof(*frame));
538 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
541 signal = current_thread_info()->exec_domain
542 && current_thread_info()->exec_domain->signal_invmap
544 ? current_thread_info()->exec_domain->signal_invmap[sig]
547 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
549 /* Give up earlier as i386, in case */
553 if (_NSIG_WORDS > 1) {
554 err |= __copy_to_user(frame->extramask, &set->sig[1],
555 sizeof(frame->extramask)); }
557 /* Give up earlier as i386, in case */
561 /* Set up to return from userspace. If provided, use a stub
562 already in userspace. */
563 if (ka->sa.sa_flags & SA_RESTORER) {
564 DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1;
567 * On SH5 all edited pointers are subject to NEFF
569 DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
570 (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
573 * Different approach on SH5.
574 * . Endianness independent asm code gets placed in entry.S .
575 * This is limited to four ASM instructions corresponding
576 * to two long longs in size.
577 * . err checking is done on the else branch only
578 * . flush_icache_range() is called upon __put_user() only
579 * . all edited pointers are subject to NEFF
580 * . being code, linker turns ShMedia bit on, always
581 * dereference index -1.
583 DEREF_REG_PR = (unsigned long) frame->retcode | 0x01;
584 DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
585 (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
587 if (__copy_to_user(frame->retcode,
588 (void *)((unsigned long)sa_default_restorer & (~1)), 16) != 0)
591 /* Cohere the trampoline with the I-cache. */
592 flush_cache_sigtramp(DEREF_REG_PR-1);
596 * Set up registers for signal handler.
597 * All edited pointers are subject to NEFF.
599 regs->regs[REG_SP] = (unsigned long) frame;
600 regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ?
601 (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP];
602 regs->regs[REG_ARG1] = signal; /* Arg for signal handler */
605 The glibc profiling support for SH-5 needs to be passed a sigcontext
606 so it can retrieve the PC. At some point during 2003 the glibc
607 support was changed to receive the sigcontext through the 2nd
608 argument, but there are still versions of libc.so in use that use
609 the 3rd argument. Until libc.so is stabilised, pass the sigcontext
610 through both 2nd and 3rd arguments.
613 regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->sc;
614 regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->sc;
616 regs->pc = (unsigned long) ka->sa.sa_handler;
617 regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc;
622 pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
623 signal, current->comm, current->pid, frame,
624 regs->pc >> 32, regs->pc & 0xffffffff,
625 DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
630 force_sigsegv(sig, current);
634 static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
635 sigset_t *set, struct pt_regs *regs)
637 struct rt_sigframe __user *frame;
641 frame = get_sigframe(ka, regs->regs[REG_SP], sizeof(*frame));
643 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
646 signal = current_thread_info()->exec_domain
647 && current_thread_info()->exec_domain->signal_invmap
649 ? current_thread_info()->exec_domain->signal_invmap[sig]
652 err |= __put_user(&frame->info, &frame->pinfo);
653 err |= __put_user(&frame->uc, &frame->puc);
654 err |= copy_siginfo_to_user(&frame->info, info);
656 /* Give up earlier as i386, in case */
660 /* Create the ucontext. */
661 err |= __put_user(0, &frame->uc.uc_flags);
662 err |= __put_user(0, &frame->uc.uc_link);
663 err |= __put_user((void *)current->sas_ss_sp,
664 &frame->uc.uc_stack.ss_sp);
665 err |= __put_user(sas_ss_flags(regs->regs[REG_SP]),
666 &frame->uc.uc_stack.ss_flags);
667 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
668 err |= setup_sigcontext(&frame->uc.uc_mcontext,
670 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
672 /* Give up earlier as i386, in case */
676 /* Set up to return from userspace. If provided, use a stub
677 already in userspace. */
678 if (ka->sa.sa_flags & SA_RESTORER) {
679 DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1;
682 * On SH5 all edited pointers are subject to NEFF
684 DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
685 (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
688 * Different approach on SH5.
689 * . Endianness independent asm code gets placed in entry.S .
690 * This is limited to four ASM instructions corresponding
691 * to two long longs in size.
692 * . err checking is done on the else branch only
693 * . flush_icache_range() is called upon __put_user() only
694 * . all edited pointers are subject to NEFF
695 * . being code, linker turns ShMedia bit on, always
696 * dereference index -1.
699 DEREF_REG_PR = (unsigned long) frame->retcode | 0x01;
700 DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
701 (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
703 if (__copy_to_user(frame->retcode,
704 (void *)((unsigned long)sa_default_rt_restorer & (~1)), 16) != 0)
707 flush_icache_range(DEREF_REG_PR-1, DEREF_REG_PR-1+15);
711 * Set up registers for signal handler.
712 * All edited pointers are subject to NEFF.
714 regs->regs[REG_SP] = (unsigned long) frame;
715 regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ?
716 (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP];
717 regs->regs[REG_ARG1] = signal; /* Arg for signal handler */
718 regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->info;
719 regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->uc.uc_mcontext;
720 regs->pc = (unsigned long) ka->sa.sa_handler;
721 regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc;
725 pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n",
726 signal, current->comm, current->pid, frame,
727 regs->pc >> 32, regs->pc & 0xffffffff,
728 DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff);
733 force_sigsegv(sig, current);
738 * OK, we're invoking a handler
741 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
742 sigset_t *oldset, struct pt_regs * regs)
746 /* Set up the stack frame */
747 if (ka->sa.sa_flags & SA_SIGINFO)
748 ret = setup_rt_frame(sig, ka, info, oldset, regs);
750 ret = setup_frame(sig, ka, oldset, regs);
752 if (ka->sa.sa_flags & SA_ONESHOT)
753 ka->sa.sa_handler = SIG_DFL;
756 spin_lock_irq(¤t->sighand->siglock);
757 sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
758 if (!(ka->sa.sa_flags & SA_NODEFER))
759 sigaddset(¤t->blocked,sig);
761 spin_unlock_irq(¤t->sighand->siglock);
767 asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
769 if (thread_info_flags & _TIF_SIGPENDING)
772 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
773 clear_thread_flag(TIF_NOTIFY_RESUME);
774 tracehook_notify_resume(regs);