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b920de1b DH |
1 | /* MN10300 Signal handling |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/sched.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/smp.h> | |
b920de1b DH |
15 | #include <linux/kernel.h> |
16 | #include <linux/signal.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/wait.h> | |
19 | #include <linux/ptrace.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/stddef.h> | |
22 | #include <linux/tty.h> | |
23 | #include <linux/personality.h> | |
24 | #include <linux/suspend.h> | |
5d289964 | 25 | #include <linux/tracehook.h> |
b920de1b DH |
26 | #include <asm/cacheflush.h> |
27 | #include <asm/ucontext.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/fpu.h> | |
30 | #include "sigframe.h" | |
31 | ||
32 | #define DEBUG_SIG 0 | |
33 | ||
34 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
35 | ||
36 | /* | |
37 | * atomically swap in the new signal mask, and wait for a signal. | |
38 | */ | |
39 | asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask) | |
40 | { | |
41 | mask &= _BLOCKABLE; | |
42 | spin_lock_irq(¤t->sighand->siglock); | |
43 | current->saved_sigmask = current->blocked; | |
44 | siginitset(¤t->blocked, mask); | |
45 | recalc_sigpending(); | |
46 | spin_unlock_irq(¤t->sighand->siglock); | |
47 | ||
48 | current->state = TASK_INTERRUPTIBLE; | |
49 | schedule(); | |
50 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
51 | return -ERESTARTNOHAND; | |
52 | } | |
53 | ||
54 | /* | |
55 | * set signal action syscall | |
56 | */ | |
57 | asmlinkage long sys_sigaction(int sig, | |
58 | const struct old_sigaction __user *act, | |
59 | struct old_sigaction __user *oact) | |
60 | { | |
61 | struct k_sigaction new_ka, old_ka; | |
62 | int ret; | |
63 | ||
64 | if (act) { | |
65 | old_sigset_t mask; | |
66 | if (verify_area(VERIFY_READ, act, sizeof(*act)) || | |
67 | __get_user(new_ka.sa.sa_handler, &act->sa_handler) || | |
68 | __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) | |
69 | return -EFAULT; | |
70 | __get_user(new_ka.sa.sa_flags, &act->sa_flags); | |
71 | __get_user(mask, &act->sa_mask); | |
72 | siginitset(&new_ka.sa.sa_mask, mask); | |
73 | } | |
74 | ||
75 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
76 | ||
77 | if (!ret && oact) { | |
78 | if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) || | |
79 | __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || | |
80 | __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) | |
81 | return -EFAULT; | |
82 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags); | |
83 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); | |
84 | } | |
85 | ||
86 | return ret; | |
87 | } | |
88 | ||
89 | /* | |
90 | * set alternate signal stack syscall | |
91 | */ | |
92 | asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t *uoss) | |
93 | { | |
94 | return do_sigaltstack(uss, uoss, __frame->sp); | |
95 | } | |
96 | ||
97 | /* | |
98 | * do a signal return; undo the signal stack. | |
99 | */ | |
100 | static int restore_sigcontext(struct pt_regs *regs, | |
101 | struct sigcontext __user *sc, long *_d0) | |
102 | { | |
103 | unsigned int err = 0; | |
104 | ||
c05628b4 AV |
105 | /* Always make any pending restarted system calls return -EINTR */ |
106 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
107 | ||
b920de1b DH |
108 | if (is_using_fpu(current)) |
109 | fpu_kill_state(current); | |
110 | ||
111 | #define COPY(x) err |= __get_user(regs->x, &sc->x) | |
112 | COPY(d1); COPY(d2); COPY(d3); | |
113 | COPY(a0); COPY(a1); COPY(a2); COPY(a3); | |
114 | COPY(e0); COPY(e1); COPY(e2); COPY(e3); | |
115 | COPY(e4); COPY(e5); COPY(e6); COPY(e7); | |
116 | COPY(lar); COPY(lir); | |
117 | COPY(mdr); COPY(mdrq); | |
118 | COPY(mcvf); COPY(mcrl); COPY(mcrh); | |
119 | COPY(sp); COPY(pc); | |
120 | #undef COPY | |
121 | ||
122 | { | |
123 | unsigned int tmpflags; | |
124 | #ifndef CONFIG_MN10300_USING_JTAG | |
125 | #define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \ | |
126 | EPSW_T | EPSW_nAR) | |
127 | #else | |
128 | #define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \ | |
129 | EPSW_nAR) | |
130 | #endif | |
131 | err |= __get_user(tmpflags, &sc->epsw); | |
132 | regs->epsw = (regs->epsw & ~USER_EPSW) | | |
133 | (tmpflags & USER_EPSW); | |
134 | regs->orig_d0 = -1; /* disable syscall checks */ | |
135 | } | |
136 | ||
137 | { | |
138 | struct fpucontext *buf; | |
139 | err |= __get_user(buf, &sc->fpucontext); | |
140 | if (buf) { | |
141 | if (verify_area(VERIFY_READ, buf, sizeof(*buf))) | |
142 | goto badframe; | |
143 | err |= fpu_restore_sigcontext(buf); | |
144 | } | |
145 | } | |
146 | ||
147 | err |= __get_user(*_d0, &sc->d0); | |
148 | return err; | |
149 | ||
150 | badframe: | |
151 | return 1; | |
152 | } | |
153 | ||
154 | /* | |
155 | * standard signal return syscall | |
156 | */ | |
157 | asmlinkage long sys_sigreturn(void) | |
158 | { | |
159 | struct sigframe __user *frame = (struct sigframe __user *) __frame->sp; | |
160 | sigset_t set; | |
161 | long d0; | |
162 | ||
163 | if (verify_area(VERIFY_READ, frame, sizeof(*frame))) | |
164 | goto badframe; | |
165 | if (__get_user(set.sig[0], &frame->sc.oldmask)) | |
166 | goto badframe; | |
167 | ||
168 | if (_NSIG_WORDS > 1 && | |
169 | __copy_from_user(&set.sig[1], &frame->extramask, | |
170 | sizeof(frame->extramask))) | |
171 | goto badframe; | |
172 | ||
173 | sigdelsetmask(&set, ~_BLOCKABLE); | |
174 | spin_lock_irq(¤t->sighand->siglock); | |
175 | current->blocked = set; | |
176 | recalc_sigpending(); | |
177 | spin_unlock_irq(¤t->sighand->siglock); | |
178 | ||
179 | if (restore_sigcontext(__frame, &frame->sc, &d0)) | |
180 | goto badframe; | |
181 | ||
182 | return d0; | |
183 | ||
184 | badframe: | |
185 | force_sig(SIGSEGV, current); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | /* | |
190 | * realtime signal return syscall | |
191 | */ | |
192 | asmlinkage long sys_rt_sigreturn(void) | |
193 | { | |
194 | struct rt_sigframe __user *frame = | |
195 | (struct rt_sigframe __user *) __frame->sp; | |
196 | sigset_t set; | |
197 | unsigned long d0; | |
198 | ||
199 | if (verify_area(VERIFY_READ, frame, sizeof(*frame))) | |
200 | goto badframe; | |
201 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) | |
202 | goto badframe; | |
203 | ||
204 | sigdelsetmask(&set, ~_BLOCKABLE); | |
205 | spin_lock_irq(¤t->sighand->siglock); | |
206 | current->blocked = set; | |
207 | recalc_sigpending(); | |
208 | spin_unlock_irq(¤t->sighand->siglock); | |
209 | ||
210 | if (restore_sigcontext(__frame, &frame->uc.uc_mcontext, &d0)) | |
211 | goto badframe; | |
212 | ||
213 | if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT) | |
214 | goto badframe; | |
215 | ||
216 | return d0; | |
217 | ||
218 | badframe: | |
219 | force_sig(SIGSEGV, current); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /* | |
224 | * store the userspace context into a signal frame | |
225 | */ | |
226 | static int setup_sigcontext(struct sigcontext __user *sc, | |
227 | struct fpucontext *fpuctx, | |
228 | struct pt_regs *regs, | |
229 | unsigned long mask) | |
230 | { | |
231 | int tmp, err = 0; | |
232 | ||
233 | #define COPY(x) err |= __put_user(regs->x, &sc->x) | |
234 | COPY(d0); COPY(d1); COPY(d2); COPY(d3); | |
235 | COPY(a0); COPY(a1); COPY(a2); COPY(a3); | |
236 | COPY(e0); COPY(e1); COPY(e2); COPY(e3); | |
237 | COPY(e4); COPY(e5); COPY(e6); COPY(e7); | |
238 | COPY(lar); COPY(lir); | |
239 | COPY(mdr); COPY(mdrq); | |
240 | COPY(mcvf); COPY(mcrl); COPY(mcrh); | |
241 | COPY(sp); COPY(epsw); COPY(pc); | |
242 | #undef COPY | |
243 | ||
244 | tmp = fpu_setup_sigcontext(fpuctx); | |
245 | if (tmp < 0) | |
246 | err = 1; | |
247 | else | |
248 | err |= __put_user(tmp ? fpuctx : NULL, &sc->fpucontext); | |
249 | ||
250 | /* non-iBCS2 extensions.. */ | |
251 | err |= __put_user(mask, &sc->oldmask); | |
252 | ||
253 | return err; | |
254 | } | |
255 | ||
256 | /* | |
257 | * determine which stack to use.. | |
258 | */ | |
259 | static inline void __user *get_sigframe(struct k_sigaction *ka, | |
260 | struct pt_regs *regs, | |
261 | size_t frame_size) | |
262 | { | |
263 | unsigned long sp; | |
264 | ||
265 | /* default to using normal stack */ | |
266 | sp = regs->sp; | |
267 | ||
268 | /* this is the X/Open sanctioned signal stack switching. */ | |
269 | if (ka->sa.sa_flags & SA_ONSTACK) { | |
4c03ee73 | 270 | if (sas_ss_flags(sp) == 0) |
b920de1b DH |
271 | sp = current->sas_ss_sp + current->sas_ss_size; |
272 | } | |
273 | ||
274 | return (void __user *) ((sp - frame_size) & ~7UL); | |
275 | } | |
276 | ||
277 | /* | |
278 | * set up a normal signal frame | |
279 | */ | |
280 | static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, | |
281 | struct pt_regs *regs) | |
282 | { | |
283 | struct sigframe __user *frame; | |
284 | int rsig; | |
285 | ||
286 | frame = get_sigframe(ka, regs, sizeof(*frame)); | |
287 | ||
288 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
289 | goto give_sigsegv; | |
290 | ||
291 | rsig = sig; | |
292 | if (sig < 32 && | |
293 | current_thread_info()->exec_domain && | |
294 | current_thread_info()->exec_domain->signal_invmap) | |
295 | rsig = current_thread_info()->exec_domain->signal_invmap[sig]; | |
296 | ||
297 | if (__put_user(rsig, &frame->sig) < 0 || | |
298 | __put_user(&frame->sc, &frame->psc) < 0) | |
299 | goto give_sigsegv; | |
300 | ||
301 | if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0])) | |
302 | goto give_sigsegv; | |
303 | ||
304 | if (_NSIG_WORDS > 1) { | |
305 | if (__copy_to_user(frame->extramask, &set->sig[1], | |
306 | sizeof(frame->extramask))) | |
307 | goto give_sigsegv; | |
308 | } | |
309 | ||
310 | /* set up to return from userspace. If provided, use a stub already in | |
311 | * userspace */ | |
312 | if (ka->sa.sa_flags & SA_RESTORER) { | |
313 | if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) | |
314 | goto give_sigsegv; | |
315 | } else { | |
316 | if (__put_user((void (*)(void))frame->retcode, | |
317 | &frame->pretcode)) | |
318 | goto give_sigsegv; | |
319 | /* this is mov $,d0; syscall 0 */ | |
320 | if (__put_user(0x2c, (char *)(frame->retcode + 0)) || | |
321 | __put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) || | |
322 | __put_user(0x00, (char *)(frame->retcode + 2)) || | |
323 | __put_user(0xf0, (char *)(frame->retcode + 3)) || | |
324 | __put_user(0xe0, (char *)(frame->retcode + 4))) | |
325 | goto give_sigsegv; | |
326 | flush_icache_range((unsigned long) frame->retcode, | |
327 | (unsigned long) frame->retcode + 5); | |
328 | } | |
329 | ||
330 | /* set up registers for signal handler */ | |
331 | regs->sp = (unsigned long) frame; | |
332 | regs->pc = (unsigned long) ka->sa.sa_handler; | |
333 | regs->d0 = sig; | |
334 | regs->d1 = (unsigned long) &frame->sc; | |
335 | ||
336 | set_fs(USER_DS); | |
337 | ||
338 | /* the tracer may want to single-step inside the handler */ | |
339 | if (test_thread_flag(TIF_SINGLESTEP)) | |
340 | ptrace_notify(SIGTRAP); | |
341 | ||
342 | #if DEBUG_SIG | |
343 | printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n", | |
344 | sig, current->comm, current->pid, frame, regs->pc, | |
345 | frame->pretcode); | |
346 | #endif | |
347 | ||
348 | return 0; | |
349 | ||
350 | give_sigsegv: | |
e46924d2 | 351 | force_sigsegv(sig, current); |
b920de1b DH |
352 | return -EFAULT; |
353 | } | |
354 | ||
355 | /* | |
356 | * set up a realtime signal frame | |
357 | */ | |
358 | static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, | |
359 | sigset_t *set, struct pt_regs *regs) | |
360 | { | |
361 | struct rt_sigframe __user *frame; | |
362 | int rsig; | |
363 | ||
364 | frame = get_sigframe(ka, regs, sizeof(*frame)); | |
365 | ||
366 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
367 | goto give_sigsegv; | |
368 | ||
369 | rsig = sig; | |
370 | if (sig < 32 && | |
371 | current_thread_info()->exec_domain && | |
372 | current_thread_info()->exec_domain->signal_invmap) | |
373 | rsig = current_thread_info()->exec_domain->signal_invmap[sig]; | |
374 | ||
375 | if (__put_user(rsig, &frame->sig) || | |
376 | __put_user(&frame->info, &frame->pinfo) || | |
377 | __put_user(&frame->uc, &frame->puc) || | |
378 | copy_siginfo_to_user(&frame->info, info)) | |
379 | goto give_sigsegv; | |
380 | ||
381 | /* create the ucontext. */ | |
382 | if (__put_user(0, &frame->uc.uc_flags) || | |
383 | __put_user(0, &frame->uc.uc_link) || | |
384 | __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) || | |
385 | __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags) || | |
386 | __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size) || | |
387 | setup_sigcontext(&frame->uc.uc_mcontext, | |
388 | &frame->fpuctx, regs, set->sig[0]) || | |
389 | __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set))) | |
390 | goto give_sigsegv; | |
391 | ||
392 | /* set up to return from userspace. If provided, use a stub already in | |
393 | * userspace */ | |
394 | if (ka->sa.sa_flags & SA_RESTORER) { | |
395 | if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) | |
396 | goto give_sigsegv; | |
397 | } else { | |
398 | if (__put_user((void(*)(void))frame->retcode, | |
399 | &frame->pretcode) || | |
400 | /* This is mov $,d0; syscall 0 */ | |
401 | __put_user(0x2c, (char *)(frame->retcode + 0)) || | |
402 | __put_user(__NR_rt_sigreturn, | |
403 | (char *)(frame->retcode + 1)) || | |
404 | __put_user(0x00, (char *)(frame->retcode + 2)) || | |
405 | __put_user(0xf0, (char *)(frame->retcode + 3)) || | |
406 | __put_user(0xe0, (char *)(frame->retcode + 4))) | |
407 | goto give_sigsegv; | |
408 | ||
409 | flush_icache_range((u_long) frame->retcode, | |
410 | (u_long) frame->retcode + 5); | |
411 | } | |
412 | ||
413 | /* Set up registers for signal handler */ | |
414 | regs->sp = (unsigned long) frame; | |
415 | regs->pc = (unsigned long) ka->sa.sa_handler; | |
416 | regs->d0 = sig; | |
417 | regs->d1 = (long) &frame->info; | |
418 | ||
419 | set_fs(USER_DS); | |
420 | ||
421 | /* the tracer may want to single-step inside the handler */ | |
422 | if (test_thread_flag(TIF_SINGLESTEP)) | |
423 | ptrace_notify(SIGTRAP); | |
424 | ||
425 | #if DEBUG_SIG | |
426 | printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n", | |
427 | sig, current->comm, current->pid, frame, regs->pc, | |
428 | frame->pretcode); | |
429 | #endif | |
430 | ||
431 | return 0; | |
432 | ||
433 | give_sigsegv: | |
e46924d2 | 434 | force_sigsegv(sig, current); |
b920de1b DH |
435 | return -EFAULT; |
436 | } | |
437 | ||
00cbf608 AV |
438 | static inline void stepback(struct pt_regs *regs) |
439 | { | |
440 | regs->pc -= 2; | |
441 | regs->orig_d0 = -1; | |
442 | } | |
443 | ||
b920de1b DH |
444 | /* |
445 | * handle the actual delivery of a signal to userspace | |
446 | */ | |
447 | static int handle_signal(int sig, | |
448 | siginfo_t *info, struct k_sigaction *ka, | |
449 | sigset_t *oldset, struct pt_regs *regs) | |
450 | { | |
451 | int ret; | |
452 | ||
453 | /* Are we from a system call? */ | |
454 | if (regs->orig_d0 >= 0) { | |
455 | /* If so, check system call restarting.. */ | |
456 | switch (regs->d0) { | |
457 | case -ERESTART_RESTARTBLOCK: | |
458 | case -ERESTARTNOHAND: | |
459 | regs->d0 = -EINTR; | |
460 | break; | |
461 | ||
462 | case -ERESTARTSYS: | |
463 | if (!(ka->sa.sa_flags & SA_RESTART)) { | |
464 | regs->d0 = -EINTR; | |
465 | break; | |
466 | } | |
467 | ||
468 | /* fallthrough */ | |
469 | case -ERESTARTNOINTR: | |
470 | regs->d0 = regs->orig_d0; | |
00cbf608 | 471 | stepback(regs); |
b920de1b DH |
472 | } |
473 | } | |
474 | ||
475 | /* Set up the stack frame */ | |
476 | if (ka->sa.sa_flags & SA_SIGINFO) | |
477 | ret = setup_rt_frame(sig, ka, info, oldset, regs); | |
478 | else | |
479 | ret = setup_frame(sig, ka, oldset, regs); | |
480 | ||
481 | if (ret == 0) { | |
482 | spin_lock_irq(¤t->sighand->siglock); | |
483 | sigorsets(¤t->blocked, ¤t->blocked, | |
484 | &ka->sa.sa_mask); | |
485 | if (!(ka->sa.sa_flags & SA_NODEFER)) | |
486 | sigaddset(¤t->blocked, sig); | |
487 | recalc_sigpending(); | |
488 | spin_unlock_irq(¤t->sighand->siglock); | |
489 | } | |
490 | ||
491 | return ret; | |
492 | } | |
493 | ||
494 | /* | |
495 | * handle a potential signal | |
496 | */ | |
497 | static void do_signal(struct pt_regs *regs) | |
498 | { | |
499 | struct k_sigaction ka; | |
500 | siginfo_t info; | |
501 | sigset_t *oldset; | |
502 | int signr; | |
503 | ||
504 | /* we want the common case to go fast, which is why we may in certain | |
505 | * cases get here from kernel mode */ | |
506 | if (!user_mode(regs)) | |
507 | return; | |
508 | ||
509 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) | |
510 | oldset = ¤t->saved_sigmask; | |
511 | else | |
512 | oldset = ¤t->blocked; | |
513 | ||
514 | signr = get_signal_to_deliver(&info, &ka, regs, NULL); | |
515 | if (signr > 0) { | |
516 | if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { | |
517 | /* a signal was successfully delivered; the saved | |
518 | * sigmask will have been stored in the signal frame, | |
519 | * and will be restored by sigreturn, so we can simply | |
520 | * clear the TIF_RESTORE_SIGMASK flag */ | |
521 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) | |
522 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
5d289964 DH |
523 | |
524 | tracehook_signal_handler(signr, &info, &ka, regs, | |
525 | test_thread_flag(TIF_SINGLESTEP)); | |
b920de1b DH |
526 | } |
527 | ||
528 | return; | |
529 | } | |
530 | ||
531 | /* did we come from a system call? */ | |
532 | if (regs->orig_d0 >= 0) { | |
533 | /* restart the system call - no handlers present */ | |
534 | switch (regs->d0) { | |
535 | case -ERESTARTNOHAND: | |
536 | case -ERESTARTSYS: | |
537 | case -ERESTARTNOINTR: | |
538 | regs->d0 = regs->orig_d0; | |
00cbf608 | 539 | stepback(regs); |
b920de1b DH |
540 | break; |
541 | ||
542 | case -ERESTART_RESTARTBLOCK: | |
543 | regs->d0 = __NR_restart_syscall; | |
00cbf608 | 544 | stepback(regs); |
b920de1b DH |
545 | break; |
546 | } | |
547 | } | |
548 | ||
549 | /* if there's no signal to deliver, we just put the saved sigmask | |
550 | * back */ | |
551 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) { | |
552 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
553 | sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); | |
554 | } | |
555 | } | |
556 | ||
557 | /* | |
558 | * notification of userspace execution resumption | |
559 | * - triggered by current->work.notify_resume | |
560 | */ | |
561 | asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags) | |
562 | { | |
563 | /* Pending single-step? */ | |
564 | if (thread_info_flags & _TIF_SINGLESTEP) { | |
565 | #ifndef CONFIG_MN10300_USING_JTAG | |
566 | regs->epsw |= EPSW_T; | |
567 | clear_thread_flag(TIF_SINGLESTEP); | |
568 | #else | |
569 | BUG(); /* no h/w single-step if using JTAG unit */ | |
570 | #endif | |
571 | } | |
572 | ||
573 | /* deal with pending signal delivery */ | |
574 | if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)) | |
575 | do_signal(regs); | |
5d289964 DH |
576 | |
577 | if (thread_info_flags & _TIF_NOTIFY_RESUME) { | |
578 | clear_thread_flag(TIF_NOTIFY_RESUME); | |
579 | tracehook_notify_resume(__frame); | |
ee18d64c DH |
580 | if (current->replacement_session_keyring) |
581 | key_replace_session_keyring(); | |
5d289964 | 582 | } |
b920de1b | 583 | } |