2 * Architecture-specific signal handling support.
4 * Copyright (C) 1999-2004 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
7 * Derived from i386 and Alpha versions.
10 #include <linux/config.h>
11 #include <linux/errno.h>
12 #include <linux/kernel.h>
14 #include <linux/ptrace.h>
15 #include <linux/sched.h>
16 #include <linux/signal.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/tty.h>
21 #include <linux/binfmts.h>
22 #include <linux/unistd.h>
23 #include <linux/wait.h>
24 #include <linux/vs_cvirt.h>
27 #include <asm/intrinsics.h>
28 #include <asm/uaccess.h>
30 #include <asm/sigcontext.h>
35 #define STACK_ALIGN 16 /* minimal alignment for stack pointer */
36 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
39 # define PUT_SIGSET(k,u) __copy_to_user((u)->sig, (k)->sig, sizeof(sigset_t))
40 # define GET_SIGSET(k,u) __copy_from_user((k)->sig, (u)->sig, sizeof(sigset_t))
42 # define PUT_SIGSET(k,u) __put_user((k)->sig[0], &(u)->sig[0])
43 # define GET_SIGSET(k,u) __get_user((k)->sig[0], &(u)->sig[0])
47 ia64_rt_sigsuspend (sigset_t __user *uset, size_t sigsetsize, struct sigscratch *scr)
51 /* XXX: Don't preclude handling different sized sigset_t's. */
52 if (sigsetsize != sizeof(sigset_t))
55 if (!access_ok(VERIFY_READ, uset, sigsetsize))
58 if (GET_SIGSET(&set, uset))
61 sigdelsetmask(&set, ~_BLOCKABLE);
63 spin_lock_irq(¤t->sighand->siglock);
65 oldset = current->blocked;
66 current->blocked = set;
69 spin_unlock_irq(¤t->sighand->siglock);
72 * The return below usually returns to the signal handler. We need to
73 * pre-set the correct error code here to ensure that the right values
74 * get saved in sigcontext by ia64_do_signal.
80 current->state = TASK_INTERRUPTIBLE;
82 if (ia64_do_signal(&oldset, scr, 1))
88 sys_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, long arg2,
89 long arg3, long arg4, long arg5, long arg6, long arg7,
92 return do_sigaltstack(uss, uoss, regs.r12);
96 restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
98 unsigned long ip, flags, nat, um, cfm, rsc;
101 /* Always make any pending restarted system calls return -EINTR */
102 current_thread_info()->restart_block.fn = do_no_restart_syscall;
104 /* restore scratch that always needs gets updated during signal delivery: */
105 err = __get_user(flags, &sc->sc_flags);
106 err |= __get_user(nat, &sc->sc_nat);
107 err |= __get_user(ip, &sc->sc_ip); /* instruction pointer */
108 err |= __get_user(cfm, &sc->sc_cfm);
109 err |= __get_user(um, &sc->sc_um); /* user mask */
110 err |= __get_user(rsc, &sc->sc_ar_rsc);
111 err |= __get_user(scr->pt.ar_unat, &sc->sc_ar_unat);
112 err |= __get_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr);
113 err |= __get_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
114 err |= __get_user(scr->pt.pr, &sc->sc_pr); /* predicates */
115 err |= __get_user(scr->pt.b0, &sc->sc_br[0]); /* b0 (rp) */
116 err |= __get_user(scr->pt.b6, &sc->sc_br[6]); /* b6 */
117 err |= __copy_from_user(&scr->pt.r1, &sc->sc_gr[1], 8); /* r1 */
118 err |= __copy_from_user(&scr->pt.r8, &sc->sc_gr[8], 4*8); /* r8-r11 */
119 err |= __copy_from_user(&scr->pt.r12, &sc->sc_gr[12], 2*8); /* r12-r13 */
120 err |= __copy_from_user(&scr->pt.r15, &sc->sc_gr[15], 8); /* r15 */
122 scr->pt.cr_ifs = cfm | (1UL << 63);
123 scr->pt.ar_rsc = rsc | (3 << 2); /* force PL3 */
125 /* establish new instruction pointer: */
126 scr->pt.cr_iip = ip & ~0x3UL;
127 ia64_psr(&scr->pt)->ri = ip & 0x3;
128 scr->pt.cr_ipsr = (scr->pt.cr_ipsr & ~IA64_PSR_UM) | (um & IA64_PSR_UM);
130 scr->scratch_unat = ia64_put_scratch_nat_bits(&scr->pt, nat);
132 if (!(flags & IA64_SC_FLAG_IN_SYSCALL)) {
133 /* Restore most scratch-state only when not in syscall. */
134 err |= __get_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */
135 err |= __get_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */
136 err |= __get_user(scr->pt.r14, &sc->sc_gr[14]); /* r14 */
137 err |= __copy_from_user(&scr->pt.ar_csd, &sc->sc_ar25, 2*8); /* ar.csd & ar.ssd */
138 err |= __copy_from_user(&scr->pt.r2, &sc->sc_gr[2], 2*8); /* r2-r3 */
139 err |= __copy_from_user(&scr->pt.r16, &sc->sc_gr[16], 16*8); /* r16-r31 */
142 if ((flags & IA64_SC_FLAG_FPH_VALID) != 0) {
143 struct ia64_psr *psr = ia64_psr(&scr->pt);
145 __copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16);
146 psr->mfh = 0; /* drop signal handler's fph contents... */
149 ia64_drop_fpu(current);
151 /* We already own the local fph, otherwise psr->dfh wouldn't be 0. */
152 __ia64_load_fpu(current->thread.fph);
153 ia64_set_local_fpu_owner(current);
161 copy_siginfo_to_user (siginfo_t __user *to, siginfo_t *from)
163 if (!access_ok(VERIFY_WRITE, to, sizeof(siginfo_t)))
165 if (from->si_code < 0) {
166 if (__copy_to_user(to, from, sizeof(siginfo_t)))
173 * If you change siginfo_t structure, please be sure this code is fixed
174 * accordingly. It should never copy any pad contained in the structure
175 * to avoid security leaks, but must copy the generic 3 ints plus the
176 * relevant union member.
178 err = __put_user(from->si_signo, &to->si_signo);
179 err |= __put_user(from->si_errno, &to->si_errno);
180 err |= __put_user((short)from->si_code, &to->si_code);
181 switch (from->si_code >> 16) {
182 case __SI_FAULT >> 16:
183 err |= __put_user(from->si_flags, &to->si_flags);
184 err |= __put_user(from->si_isr, &to->si_isr);
185 case __SI_POLL >> 16:
186 err |= __put_user(from->si_addr, &to->si_addr);
187 err |= __put_user(from->si_imm, &to->si_imm);
189 case __SI_TIMER >> 16:
190 err |= __put_user(from->si_tid, &to->si_tid);
191 err |= __put_user(from->si_overrun, &to->si_overrun);
192 err |= __put_user(from->si_ptr, &to->si_ptr);
194 case __SI_RT >> 16: /* Not generated by the kernel as of now. */
195 case __SI_MESGQ >> 16:
196 err |= __put_user(from->si_uid, &to->si_uid);
197 err |= __put_user(from->si_pid, &to->si_pid);
198 err |= __put_user(from->si_ptr, &to->si_ptr);
200 case __SI_CHLD >> 16:
201 err |= __put_user(from->si_utime, &to->si_utime);
202 err |= __put_user(from->si_stime, &to->si_stime);
203 err |= __put_user(from->si_status, &to->si_status);
205 err |= __put_user(from->si_uid, &to->si_uid);
206 err |= __put_user(from->si_pid, &to->si_pid);
214 ia64_rt_sigreturn (struct sigscratch *scr)
216 extern char ia64_strace_leave_kernel, ia64_leave_kernel;
217 struct sigcontext __user *sc;
222 sc = &((struct sigframe __user *) (scr->pt.r12 + 16))->sc;
225 * When we return to the previously executing context, r8 and r10 have already
226 * been setup the way we want them. Indeed, if the signal wasn't delivered while
227 * in a system call, we must not touch r8 or r10 as otherwise user-level state
228 * could be corrupted.
230 retval = (long) &ia64_leave_kernel;
231 if (test_thread_flag(TIF_SYSCALL_TRACE)
232 || test_thread_flag(TIF_SYSCALL_AUDIT))
234 * strace expects to be notified after sigreturn returns even though the
235 * context to which we return may not be in the middle of a syscall.
236 * Thus, the return-value that strace displays for sigreturn is
239 retval = (long) &ia64_strace_leave_kernel;
241 if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
244 if (GET_SIGSET(&set, &sc->sc_mask))
247 sigdelsetmask(&set, ~_BLOCKABLE);
249 spin_lock_irq(¤t->sighand->siglock);
251 current->blocked = set;
254 spin_unlock_irq(¤t->sighand->siglock);
256 if (restore_sigcontext(sc, scr))
260 printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
261 current->comm, current->pid, scr->pt.r12, scr->pt.cr_iip);
264 * It is more difficult to avoid calling this function than to
265 * call it and ignore errors.
267 do_sigaltstack(&sc->sc_stack, NULL, scr->pt.r12);
271 si.si_signo = SIGSEGV;
273 si.si_code = SI_KERNEL;
274 si.si_pid = current->pid;
275 si.si_uid = current->uid;
277 force_sig_info(SIGSEGV, &si, current);
282 * This does just the minimum required setup of sigcontext.
283 * Specifically, it only installs data that is either not knowable at
284 * the user-level or that gets modified before execution in the
285 * trampoline starts. Everything else is done at the user-level.
288 setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratch *scr)
290 unsigned long flags = 0, ifs, cfm, nat;
293 ifs = scr->pt.cr_ifs;
295 if (on_sig_stack((unsigned long) sc))
296 flags |= IA64_SC_FLAG_ONSTACK;
297 if ((ifs & (1UL << 63)) == 0)
298 /* if cr_ifs doesn't have the valid bit set, we got here through a syscall */
299 flags |= IA64_SC_FLAG_IN_SYSCALL;
300 cfm = ifs & ((1UL << 38) - 1);
301 ia64_flush_fph(current);
302 if ((current->thread.flags & IA64_THREAD_FPH_VALID)) {
303 flags |= IA64_SC_FLAG_FPH_VALID;
304 __copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16);
307 nat = ia64_get_scratch_nat_bits(&scr->pt, scr->scratch_unat);
309 err = __put_user(flags, &sc->sc_flags);
310 err |= __put_user(nat, &sc->sc_nat);
311 err |= PUT_SIGSET(mask, &sc->sc_mask);
312 err |= __put_user(cfm, &sc->sc_cfm);
313 err |= __put_user(scr->pt.cr_ipsr & IA64_PSR_UM, &sc->sc_um);
314 err |= __put_user(scr->pt.ar_rsc, &sc->sc_ar_rsc);
315 err |= __put_user(scr->pt.ar_unat, &sc->sc_ar_unat); /* ar.unat */
316 err |= __put_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr); /* ar.fpsr */
317 err |= __put_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
318 err |= __put_user(scr->pt.pr, &sc->sc_pr); /* predicates */
319 err |= __put_user(scr->pt.b0, &sc->sc_br[0]); /* b0 (rp) */
320 err |= __put_user(scr->pt.b6, &sc->sc_br[6]); /* b6 */
321 err |= __copy_to_user(&sc->sc_gr[1], &scr->pt.r1, 8); /* r1 */
322 err |= __copy_to_user(&sc->sc_gr[8], &scr->pt.r8, 4*8); /* r8-r11 */
323 err |= __copy_to_user(&sc->sc_gr[12], &scr->pt.r12, 2*8); /* r12-r13 */
324 err |= __copy_to_user(&sc->sc_gr[15], &scr->pt.r15, 8); /* r15 */
325 err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip);
327 if (flags & IA64_SC_FLAG_IN_SYSCALL) {
328 /* Clear scratch registers if the signal interrupted a system call. */
329 err |= __put_user(0, &sc->sc_ar_ccv); /* ar.ccv */
330 err |= __put_user(0, &sc->sc_br[7]); /* b7 */
331 err |= __put_user(0, &sc->sc_gr[14]); /* r14 */
332 err |= __clear_user(&sc->sc_ar25, 2*8); /* ar.csd & ar.ssd */
333 err |= __clear_user(&sc->sc_gr[2], 2*8); /* r2-r3 */
334 err |= __clear_user(&sc->sc_gr[16], 16*8); /* r16-r31 */
336 /* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */
337 err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */
338 err |= __put_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */
339 err |= __put_user(scr->pt.r14, &sc->sc_gr[14]); /* r14 */
340 err |= __copy_to_user(&sc->sc_ar25, &scr->pt.ar_csd, 2*8); /* ar.csd & ar.ssd */
341 err |= __copy_to_user(&sc->sc_gr[2], &scr->pt.r2, 2*8); /* r2-r3 */
342 err |= __copy_to_user(&sc->sc_gr[16], &scr->pt.r16, 16*8); /* r16-r31 */
348 * Check whether the register-backing store is already on the signal stack.
351 rbs_on_sig_stack (unsigned long bsp)
353 return (bsp - current->sas_ss_sp < current->sas_ss_size);
357 force_sigsegv_info (int sig, void __user *addr)
362 if (sig == SIGSEGV) {
364 * Acquiring siglock around the sa_handler-update is almost
365 * certainly overkill, but this isn't a
366 * performance-critical path and I'd rather play it safe
367 * here than having to debug a nasty race if and when
368 * something changes in kernel/signal.c that would make it
369 * no longer safe to modify sa_handler without holding the
372 spin_lock_irqsave(¤t->sighand->siglock, flags);
373 current->sighand->action[sig - 1].sa.sa_handler = SIG_DFL;
374 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
376 si.si_signo = SIGSEGV;
378 si.si_code = SI_KERNEL;
379 si.si_pid = current->pid;
380 si.si_uid = current->uid;
382 force_sig_info(SIGSEGV, &si, current);
387 setup_frame (int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set,
388 struct sigscratch *scr)
390 extern char __kernel_sigtramp[];
391 unsigned long tramp_addr, new_rbs = 0, new_sp;
392 struct sigframe __user *frame;
395 new_sp = scr->pt.r12;
396 tramp_addr = (unsigned long) __kernel_sigtramp;
397 if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(new_sp) == 0) {
398 new_sp = current->sas_ss_sp + current->sas_ss_size;
400 * We need to check for the register stack being on the signal stack
401 * separately, because it's switched separately (memory stack is switched
402 * in the kernel, register stack is switched in the signal trampoline).
404 if (!rbs_on_sig_stack(scr->pt.ar_bspstore))
405 new_rbs = (current->sas_ss_sp + sizeof(long) - 1) & ~(sizeof(long) - 1);
407 frame = (void __user *) ((new_sp - sizeof(*frame)) & -STACK_ALIGN);
409 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
410 return force_sigsegv_info(sig, frame);
412 err = __put_user(sig, &frame->arg0);
413 err |= __put_user(&frame->info, &frame->arg1);
414 err |= __put_user(&frame->sc, &frame->arg2);
415 err |= __put_user(new_rbs, &frame->sc.sc_rbs_base);
416 err |= __put_user(0, &frame->sc.sc_loadrs); /* initialize to zero */
417 err |= __put_user(ka->sa.sa_handler, &frame->handler);
419 err |= copy_siginfo_to_user(&frame->info, info);
421 err |= __put_user(current->sas_ss_sp, &frame->sc.sc_stack.ss_sp);
422 err |= __put_user(current->sas_ss_size, &frame->sc.sc_stack.ss_size);
423 err |= __put_user(sas_ss_flags(scr->pt.r12), &frame->sc.sc_stack.ss_flags);
424 err |= setup_sigcontext(&frame->sc, set, scr);
427 return force_sigsegv_info(sig, frame);
429 scr->pt.r12 = (unsigned long) frame - 16; /* new stack pointer */
430 scr->pt.ar_fpsr = FPSR_DEFAULT; /* reset fpsr for signal handler */
431 scr->pt.cr_iip = tramp_addr;
432 ia64_psr(&scr->pt)->ri = 0; /* start executing in first slot */
433 ia64_psr(&scr->pt)->be = 0; /* force little-endian byte-order */
435 * Force the interruption function mask to zero. This has no effect when a
436 * system-call got interrupted by a signal (since, in that case, scr->pt_cr_ifs is
437 * ignored), but it has the desirable effect of making it possible to deliver a
438 * signal with an incomplete register frame (which happens when a mandatory RSE
439 * load faults). Furthermore, it has no negative effect on the getting the user's
440 * dirty partition preserved, because that's governed by scr->pt.loadrs.
442 scr->pt.cr_ifs = (1UL << 63);
445 * Note: this affects only the NaT bits of the scratch regs (the ones saved in
446 * pt_regs), which is exactly what we want.
448 scr->scratch_unat = 0; /* ensure NaT bits of r12 is clear */
451 printk("SIG deliver (%s:%d): sig=%d sp=%lx ip=%lx handler=%p\n",
452 current->comm, current->pid, sig, scr->pt.r12, frame->sc.sc_ip, frame->handler);
458 handle_signal (unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset,
459 struct sigscratch *scr)
461 if (IS_IA32_PROCESS(&scr->pt)) {
462 /* send signal to IA-32 process */
463 if (!ia32_setup_frame1(sig, ka, info, oldset, &scr->pt))
466 /* send signal to IA-64 process */
467 if (!setup_frame(sig, ka, info, oldset, scr))
470 spin_lock_irq(¤t->sighand->siglock);
471 sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask);
472 if (!(ka->sa.sa_flags & SA_NODEFER))
473 sigaddset(¤t->blocked, sig);
475 spin_unlock_irq(¤t->sighand->siglock);
480 * Note that `init' is a special process: it doesn't get signals it doesn't want to
481 * handle. Thus you cannot kill init even with a SIGKILL even by mistake.
484 ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
486 struct k_sigaction ka;
488 long restart = in_syscall;
489 long errno = scr->pt.r8;
490 # define ERR_CODE(c) (IS_IA32_PROCESS(&scr->pt) ? -(c) : (c))
493 * In the ia64_leave_kernel code path, we want the common case to go fast, which
494 * is why we may in certain cases get here from kernel mode. Just return without
495 * doing anything if so.
497 if (!user_mode(&scr->pt))
501 oldset = ¤t->blocked;
504 * This only loops in the rare cases of handle_signal() failing, in which case we
505 * need to push through a forced SIGSEGV.
508 int signr = get_signal_to_deliver(&info, &ka, &scr->pt, NULL);
511 * get_signal_to_deliver() may have run a debugger (via notify_parent())
512 * and the debugger may have modified the state (e.g., to arrange for an
513 * inferior call), thus it's important to check for restarting _after_
514 * get_signal_to_deliver().
516 if (IS_IA32_PROCESS(&scr->pt)) {
523 } else if ((long) scr->pt.r10 != -1)
525 * A system calls has to be restarted only if one of the error codes
526 * ERESTARTNOHAND, ERESTARTSYS, or ERESTARTNOINTR is returned. If r10
527 * isn't -1 then r8 doesn't hold an error code and we don't need to
528 * restart the syscall, so we can clear the "restart" flag here.
535 if (unlikely(restart)) {
537 case ERESTART_RESTARTBLOCK:
539 scr->pt.r8 = ERR_CODE(EINTR);
540 /* note: scr->pt.r10 is already -1 */
544 if ((ka.sa.sa_flags & SA_RESTART) == 0) {
545 scr->pt.r8 = ERR_CODE(EINTR);
546 /* note: scr->pt.r10 is already -1 */
550 if (IS_IA32_PROCESS(&scr->pt)) {
551 scr->pt.r8 = scr->pt.r1;
554 ia64_decrement_ip(&scr->pt);
555 restart = 0; /* don't restart twice if handle_signal() fails... */
560 * Whee! Actually deliver the signal. If the delivery failed, we need to
561 * continue to iterate in this loop so we can deliver the SIGSEGV...
563 if (handle_signal(signr, &ka, &info, oldset, scr))
567 /* Did we come from a system call? */
569 /* Restart the system call - no handlers present */
570 if (errno == ERESTARTNOHAND || errno == ERESTARTSYS || errno == ERESTARTNOINTR
571 || errno == ERESTART_RESTARTBLOCK)
573 if (IS_IA32_PROCESS(&scr->pt)) {
574 scr->pt.r8 = scr->pt.r1;
576 if (errno == ERESTART_RESTARTBLOCK)
577 scr->pt.r8 = 0; /* x86 version of __NR_restart_syscall */
580 * Note: the syscall number is in r15 which is saved in
581 * pt_regs so all we need to do here is adjust ip so that
582 * the "break" instruction gets re-executed.
584 ia64_decrement_ip(&scr->pt);
585 if (errno == ERESTART_RESTARTBLOCK)
586 scr->pt.r15 = __NR_restart_syscall;
593 /* Set a delayed signal that was detected in MCA/INIT/NMI/PMI context where it
594 * could not be delivered. It is important that the target process is not
595 * allowed to do any more work in user space. Possible cases for the target
598 * - It is sleeping and will wake up soon. Store the data in the current task,
599 * the signal will be sent when the current task returns from the next
602 * - It is running in user context. Store the data in the current task, the
603 * signal will be sent when the current task returns from the next interrupt.
605 * - It is running in kernel context on this or another cpu and will return to
606 * user context. Store the data in the target task, the signal will be sent
607 * to itself when the target task returns to user space.
609 * - It is running in kernel context on this cpu and will sleep before
610 * returning to user context. Because this is also the current task, the
611 * signal will not get delivered and the task could sleep indefinitely.
612 * Store the data in the idle task for this cpu, the signal will be sent
613 * after the idle task processes its next interrupt.
615 * To cover all cases, store the data in the target task, the current task and
616 * the idle task on this cpu. Whatever happens, the signal will be delivered
617 * to the target task before it can do any useful user space work. Multiple
618 * deliveries have no unwanted side effects.
620 * Note: This code is executed in MCA/INIT/NMI/PMI context, with interrupts
621 * disabled. It must not take any locks nor use kernel structures or services
622 * that require locks.
625 /* To ensure that we get the right pid, check its start time. To avoid extra
626 * include files in thread_info.h, convert the task start_time to unsigned long,
627 * giving us a cycle time of > 580 years.
629 static inline unsigned long
630 start_time_ul(const struct task_struct *t)
632 return t->start_time.tv_sec * NSEC_PER_SEC + t->start_time.tv_nsec;
636 set_sigdelayed(pid_t pid, int signo, int code, void __user *addr)
638 struct task_struct *t;
639 unsigned long start_time = 0;
642 for (i = 1; i <= 3; ++i) {
645 t = find_task_by_pid(pid);
647 start_time = start_time_ul(t);
653 t = idle_task(smp_processor_id());
659 task_thread_info(t)->sigdelayed.signo = signo;
660 task_thread_info(t)->sigdelayed.code = code;
661 task_thread_info(t)->sigdelayed.addr = addr;
662 task_thread_info(t)->sigdelayed.start_time = start_time;
663 task_thread_info(t)->sigdelayed.pid = pid;
665 set_tsk_thread_flag(t, TIF_SIGDELAYED);
669 /* Called from entry.S when it detects TIF_SIGDELAYED, a delayed signal that
670 * was detected in MCA/INIT/NMI/PMI context where it could not be delivered.
676 struct siginfo siginfo;
678 struct task_struct *t;
680 clear_thread_flag(TIF_SIGDELAYED);
681 memset(&siginfo, 0, sizeof(siginfo));
682 siginfo.si_signo = current_thread_info()->sigdelayed.signo;
683 siginfo.si_code = current_thread_info()->sigdelayed.code;
684 siginfo.si_addr = current_thread_info()->sigdelayed.addr;
685 pid = current_thread_info()->sigdelayed.pid;
686 t = find_task_by_pid(pid);
689 if (current_thread_info()->sigdelayed.start_time != start_time_ul(t))
691 force_sig_info(siginfo.si_signo, &siginfo, t);