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1da177e4 LT |
1 | /* signal.c: FRV specific bits of signal handling |
2 | * | |
3 | * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * - Derived from arch/m68k/kernel/signal.c | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/sched.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/smp.h> | |
16 | #include <linux/smp_lock.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/signal.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/wait.h> | |
21 | #include <linux/ptrace.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/personality.h> | |
24 | #include <linux/suspend.h> | |
25 | #include <asm/ucontext.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/cacheflush.h> | |
28 | ||
29 | #define DEBUG_SIG 0 | |
30 | ||
31 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
32 | ||
33 | struct fdpic_func_descriptor { | |
34 | unsigned long text; | |
35 | unsigned long GOT; | |
36 | }; | |
37 | ||
1da177e4 LT |
38 | /* |
39 | * Atomically swap in the new signal mask, and wait for a signal. | |
40 | */ | |
41 | asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask) | |
42 | { | |
1da177e4 LT |
43 | mask &= _BLOCKABLE; |
44 | spin_lock_irq(¤t->sighand->siglock); | |
a411aee9 | 45 | current->saved_sigmask = current->blocked; |
1da177e4 LT |
46 | siginitset(¤t->blocked, mask); |
47 | recalc_sigpending(); | |
48 | spin_unlock_irq(¤t->sighand->siglock); | |
49 | ||
a411aee9 DH |
50 | current->state = TASK_INTERRUPTIBLE; |
51 | schedule(); | |
52 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
53 | return -ERESTARTNOHAND; | |
1da177e4 LT |
54 | } |
55 | ||
56 | asmlinkage int sys_sigaction(int sig, | |
57 | const struct old_sigaction __user *act, | |
58 | struct old_sigaction __user *oact) | |
59 | { | |
60 | struct k_sigaction new_ka, old_ka; | |
61 | int ret; | |
62 | ||
63 | if (act) { | |
64 | old_sigset_t mask; | |
65 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
66 | __get_user(new_ka.sa.sa_handler, &act->sa_handler) || | |
67 | __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) | |
68 | return -EFAULT; | |
69 | __get_user(new_ka.sa.sa_flags, &act->sa_flags); | |
70 | __get_user(mask, &act->sa_mask); | |
71 | siginitset(&new_ka.sa.sa_mask, mask); | |
72 | } | |
73 | ||
74 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
75 | ||
76 | if (!ret && oact) { | |
77 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
78 | __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || | |
79 | __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) | |
80 | return -EFAULT; | |
81 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags); | |
82 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); | |
83 | } | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | asmlinkage | |
89 | int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) | |
90 | { | |
91 | return do_sigaltstack(uss, uoss, __frame->sp); | |
92 | } | |
93 | ||
94 | ||
95 | /* | |
96 | * Do a signal return; undo the signal stack. | |
97 | */ | |
98 | ||
99 | struct sigframe | |
100 | { | |
9e4d11f8 | 101 | __sigrestore_t pretcode; |
1da177e4 LT |
102 | int sig; |
103 | struct sigcontext sc; | |
104 | unsigned long extramask[_NSIG_WORDS-1]; | |
105 | uint32_t retcode[2]; | |
106 | }; | |
107 | ||
108 | struct rt_sigframe | |
109 | { | |
9e4d11f8 | 110 | __sigrestore_t pretcode; |
1da177e4 | 111 | int sig; |
9e4d11f8 AV |
112 | struct siginfo __user *pinfo; |
113 | void __user *puc; | |
1da177e4 LT |
114 | struct siginfo info; |
115 | struct ucontext uc; | |
116 | uint32_t retcode[2]; | |
117 | }; | |
118 | ||
119 | static int restore_sigcontext(struct sigcontext __user *sc, int *_gr8) | |
120 | { | |
121 | struct user_context *user = current->thread.user; | |
122 | unsigned long tbr, psr; | |
123 | ||
124 | tbr = user->i.tbr; | |
125 | psr = user->i.psr; | |
126 | if (copy_from_user(user, &sc->sc_context, sizeof(sc->sc_context))) | |
127 | goto badframe; | |
128 | user->i.tbr = tbr; | |
129 | user->i.psr = psr; | |
130 | ||
131 | restore_user_regs(user); | |
132 | ||
133 | user->i.syscallno = -1; /* disable syscall checks */ | |
134 | ||
135 | *_gr8 = user->i.gr[8]; | |
136 | return 0; | |
137 | ||
138 | badframe: | |
139 | return 1; | |
140 | } | |
141 | ||
142 | asmlinkage int sys_sigreturn(void) | |
143 | { | |
144 | struct sigframe __user *frame = (struct sigframe __user *) __frame->sp; | |
145 | sigset_t set; | |
146 | int gr8; | |
147 | ||
148 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) | |
149 | goto badframe; | |
150 | if (__get_user(set.sig[0], &frame->sc.sc_oldmask)) | |
151 | goto badframe; | |
152 | ||
153 | if (_NSIG_WORDS > 1 && | |
154 | __copy_from_user(&set.sig[1], &frame->extramask, sizeof(frame->extramask))) | |
155 | goto badframe; | |
156 | ||
157 | sigdelsetmask(&set, ~_BLOCKABLE); | |
158 | spin_lock_irq(¤t->sighand->siglock); | |
159 | current->blocked = set; | |
160 | recalc_sigpending(); | |
161 | spin_unlock_irq(¤t->sighand->siglock); | |
162 | ||
163 | if (restore_sigcontext(&frame->sc, &gr8)) | |
164 | goto badframe; | |
165 | return gr8; | |
166 | ||
167 | badframe: | |
168 | force_sig(SIGSEGV, current); | |
169 | return 0; | |
170 | } | |
171 | ||
172 | asmlinkage int sys_rt_sigreturn(void) | |
173 | { | |
174 | struct rt_sigframe __user *frame = (struct rt_sigframe __user *) __frame->sp; | |
175 | sigset_t set; | |
176 | int gr8; | |
177 | ||
178 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) | |
179 | goto badframe; | |
180 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) | |
181 | goto badframe; | |
182 | ||
183 | sigdelsetmask(&set, ~_BLOCKABLE); | |
184 | spin_lock_irq(¤t->sighand->siglock); | |
185 | current->blocked = set; | |
186 | recalc_sigpending(); | |
187 | spin_unlock_irq(¤t->sighand->siglock); | |
188 | ||
189 | if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8)) | |
190 | goto badframe; | |
191 | ||
192 | if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT) | |
193 | goto badframe; | |
194 | ||
195 | return gr8; | |
196 | ||
197 | badframe: | |
198 | force_sig(SIGSEGV, current); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Set up a signal frame | |
204 | */ | |
205 | static int setup_sigcontext(struct sigcontext __user *sc, unsigned long mask) | |
206 | { | |
207 | save_user_regs(current->thread.user); | |
208 | ||
209 | if (copy_to_user(&sc->sc_context, current->thread.user, sizeof(sc->sc_context)) != 0) | |
210 | goto badframe; | |
211 | ||
212 | /* non-iBCS2 extensions.. */ | |
213 | if (__put_user(mask, &sc->sc_oldmask) < 0) | |
214 | goto badframe; | |
215 | ||
216 | return 0; | |
217 | ||
218 | badframe: | |
219 | return 1; | |
220 | } | |
221 | ||
222 | /*****************************************************************************/ | |
223 | /* | |
224 | * Determine which stack to use.. | |
225 | */ | |
226 | static inline void __user *get_sigframe(struct k_sigaction *ka, | |
1da177e4 LT |
227 | size_t frame_size) |
228 | { | |
229 | unsigned long sp; | |
230 | ||
231 | /* Default to using normal stack */ | |
fef2b580 | 232 | sp = __frame->sp; |
1da177e4 LT |
233 | |
234 | /* This is the X/Open sanctioned signal stack switching. */ | |
235 | if (ka->sa.sa_flags & SA_ONSTACK) { | |
d09042da | 236 | if (! sas_ss_flags(sp)) |
1da177e4 LT |
237 | sp = current->sas_ss_sp + current->sas_ss_size; |
238 | } | |
239 | ||
240 | return (void __user *) ((sp - frame_size) & ~7UL); | |
fef2b580 | 241 | |
1da177e4 LT |
242 | } /* end get_sigframe() */ |
243 | ||
244 | /*****************************************************************************/ | |
245 | /* | |
246 | * | |
247 | */ | |
fef2b580 | 248 | static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set) |
1da177e4 LT |
249 | { |
250 | struct sigframe __user *frame; | |
251 | int rsig; | |
252 | ||
fef2b580 | 253 | frame = get_sigframe(ka, sizeof(*frame)); |
1da177e4 LT |
254 | |
255 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
256 | goto give_sigsegv; | |
257 | ||
258 | rsig = sig; | |
259 | if (sig < 32 && | |
260 | __current_thread_info->exec_domain && | |
261 | __current_thread_info->exec_domain->signal_invmap) | |
262 | rsig = __current_thread_info->exec_domain->signal_invmap[sig]; | |
263 | ||
264 | if (__put_user(rsig, &frame->sig) < 0) | |
265 | goto give_sigsegv; | |
266 | ||
267 | if (setup_sigcontext(&frame->sc, set->sig[0])) | |
268 | goto give_sigsegv; | |
269 | ||
270 | if (_NSIG_WORDS > 1) { | |
271 | if (__copy_to_user(frame->extramask, &set->sig[1], | |
272 | sizeof(frame->extramask))) | |
273 | goto give_sigsegv; | |
274 | } | |
275 | ||
276 | /* Set up to return from userspace. If provided, use a stub | |
277 | * already in userspace. */ | |
278 | if (ka->sa.sa_flags & SA_RESTORER) { | |
279 | if (__put_user(ka->sa.sa_restorer, &frame->pretcode) < 0) | |
280 | goto give_sigsegv; | |
281 | } | |
282 | else { | |
283 | /* Set up the following code on the stack: | |
284 | * setlos #__NR_sigreturn,gr7 | |
285 | * tira gr0,0 | |
286 | */ | |
9e4d11f8 | 287 | if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) || |
1da177e4 LT |
288 | __put_user(0x8efc0000|__NR_sigreturn, &frame->retcode[0]) || |
289 | __put_user(0xc0700000, &frame->retcode[1])) | |
290 | goto give_sigsegv; | |
291 | ||
292 | flush_icache_range((unsigned long) frame->retcode, | |
293 | (unsigned long) (frame->retcode + 2)); | |
294 | } | |
295 | ||
296 | /* set up registers for signal handler */ | |
fef2b580 DH |
297 | __frame->sp = (unsigned long) frame; |
298 | __frame->lr = (unsigned long) &frame->retcode; | |
299 | __frame->gr8 = sig; | |
1da177e4 LT |
300 | |
301 | if (get_personality & FDPIC_FUNCPTRS) { | |
302 | struct fdpic_func_descriptor __user *funcptr = | |
9e4d11f8 | 303 | (struct fdpic_func_descriptor __user *) ka->sa.sa_handler; |
fef2b580 DH |
304 | __get_user(__frame->pc, &funcptr->text); |
305 | __get_user(__frame->gr15, &funcptr->GOT); | |
1da177e4 | 306 | } else { |
fef2b580 DH |
307 | __frame->pc = (unsigned long) ka->sa.sa_handler; |
308 | __frame->gr15 = 0; | |
1da177e4 LT |
309 | } |
310 | ||
311 | set_fs(USER_DS); | |
312 | ||
8efc0ab5 DH |
313 | /* the tracer may want to single-step inside the handler */ |
314 | if (test_thread_flag(TIF_SINGLESTEP)) | |
315 | ptrace_notify(SIGTRAP); | |
316 | ||
1da177e4 LT |
317 | #if DEBUG_SIG |
318 | printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n", | |
fef2b580 | 319 | sig, current->comm, current->pid, frame, __frame->pc, |
8efc0ab5 | 320 | frame->pretcode); |
1da177e4 LT |
321 | #endif |
322 | ||
a411aee9 | 323 | return 0; |
1da177e4 LT |
324 | |
325 | give_sigsegv: | |
1da177e4 | 326 | force_sig(SIGSEGV, current); |
a411aee9 | 327 | return -EFAULT; |
8efc0ab5 | 328 | |
1da177e4 LT |
329 | } /* end setup_frame() */ |
330 | ||
331 | /*****************************************************************************/ | |
332 | /* | |
333 | * | |
334 | */ | |
8efc0ab5 | 335 | static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, |
fef2b580 | 336 | sigset_t *set) |
1da177e4 LT |
337 | { |
338 | struct rt_sigframe __user *frame; | |
339 | int rsig; | |
340 | ||
fef2b580 | 341 | frame = get_sigframe(ka, sizeof(*frame)); |
1da177e4 LT |
342 | |
343 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
344 | goto give_sigsegv; | |
345 | ||
346 | rsig = sig; | |
347 | if (sig < 32 && | |
348 | __current_thread_info->exec_domain && | |
349 | __current_thread_info->exec_domain->signal_invmap) | |
350 | rsig = __current_thread_info->exec_domain->signal_invmap[sig]; | |
351 | ||
352 | if (__put_user(rsig, &frame->sig) || | |
353 | __put_user(&frame->info, &frame->pinfo) || | |
354 | __put_user(&frame->uc, &frame->puc)) | |
355 | goto give_sigsegv; | |
356 | ||
357 | if (copy_siginfo_to_user(&frame->info, info)) | |
358 | goto give_sigsegv; | |
359 | ||
360 | /* Create the ucontext. */ | |
361 | if (__put_user(0, &frame->uc.uc_flags) || | |
9e4d11f8 AV |
362 | __put_user(NULL, &frame->uc.uc_link) || |
363 | __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) || | |
fef2b580 | 364 | __put_user(sas_ss_flags(__frame->sp), &frame->uc.uc_stack.ss_flags) || |
1da177e4 LT |
365 | __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size)) |
366 | goto give_sigsegv; | |
367 | ||
368 | if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0])) | |
369 | goto give_sigsegv; | |
370 | ||
371 | if (__copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set))) | |
372 | goto give_sigsegv; | |
373 | ||
374 | /* Set up to return from userspace. If provided, use a stub | |
375 | * already in userspace. */ | |
376 | if (ka->sa.sa_flags & SA_RESTORER) { | |
377 | if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) | |
378 | goto give_sigsegv; | |
379 | } | |
380 | else { | |
381 | /* Set up the following code on the stack: | |
382 | * setlos #__NR_sigreturn,gr7 | |
383 | * tira gr0,0 | |
384 | */ | |
9e4d11f8 | 385 | if (__put_user((__sigrestore_t)frame->retcode, &frame->pretcode) || |
1da177e4 LT |
386 | __put_user(0x8efc0000|__NR_rt_sigreturn, &frame->retcode[0]) || |
387 | __put_user(0xc0700000, &frame->retcode[1])) | |
388 | goto give_sigsegv; | |
389 | ||
390 | flush_icache_range((unsigned long) frame->retcode, | |
391 | (unsigned long) (frame->retcode + 2)); | |
392 | } | |
393 | ||
394 | /* Set up registers for signal handler */ | |
fef2b580 DH |
395 | __frame->sp = (unsigned long) frame; |
396 | __frame->lr = (unsigned long) &frame->retcode; | |
397 | __frame->gr8 = sig; | |
398 | __frame->gr9 = (unsigned long) &frame->info; | |
1da177e4 LT |
399 | |
400 | if (get_personality & FDPIC_FUNCPTRS) { | |
9e4d11f8 | 401 | struct fdpic_func_descriptor __user *funcptr = |
1da177e4 | 402 | (struct fdpic_func_descriptor __user *) ka->sa.sa_handler; |
fef2b580 DH |
403 | __get_user(__frame->pc, &funcptr->text); |
404 | __get_user(__frame->gr15, &funcptr->GOT); | |
1da177e4 | 405 | } else { |
fef2b580 DH |
406 | __frame->pc = (unsigned long) ka->sa.sa_handler; |
407 | __frame->gr15 = 0; | |
1da177e4 LT |
408 | } |
409 | ||
410 | set_fs(USER_DS); | |
411 | ||
8efc0ab5 DH |
412 | /* the tracer may want to single-step inside the handler */ |
413 | if (test_thread_flag(TIF_SINGLESTEP)) | |
414 | ptrace_notify(SIGTRAP); | |
415 | ||
1da177e4 LT |
416 | #if DEBUG_SIG |
417 | printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n", | |
fef2b580 | 418 | sig, current->comm, current->pid, frame, __frame->pc, |
8efc0ab5 | 419 | frame->pretcode); |
1da177e4 LT |
420 | #endif |
421 | ||
a411aee9 | 422 | return 0; |
1da177e4 LT |
423 | |
424 | give_sigsegv: | |
1da177e4 | 425 | force_sig(SIGSEGV, current); |
a411aee9 | 426 | return -EFAULT; |
1da177e4 LT |
427 | |
428 | } /* end setup_rt_frame() */ | |
429 | ||
430 | /*****************************************************************************/ | |
431 | /* | |
432 | * OK, we're invoking a handler | |
433 | */ | |
8efc0ab5 | 434 | static int handle_signal(unsigned long sig, siginfo_t *info, |
fef2b580 | 435 | struct k_sigaction *ka, sigset_t *oldset) |
1da177e4 | 436 | { |
8efc0ab5 DH |
437 | int ret; |
438 | ||
1da177e4 | 439 | /* Are we from a system call? */ |
fef2b580 | 440 | if (in_syscall(__frame)) { |
1da177e4 | 441 | /* If so, check system call restarting.. */ |
fef2b580 | 442 | switch (__frame->gr8) { |
1da177e4 LT |
443 | case -ERESTART_RESTARTBLOCK: |
444 | case -ERESTARTNOHAND: | |
fef2b580 | 445 | __frame->gr8 = -EINTR; |
1da177e4 LT |
446 | break; |
447 | ||
448 | case -ERESTARTSYS: | |
449 | if (!(ka->sa.sa_flags & SA_RESTART)) { | |
fef2b580 | 450 | __frame->gr8 = -EINTR; |
1da177e4 LT |
451 | break; |
452 | } | |
8efc0ab5 | 453 | |
1da177e4 LT |
454 | /* fallthrough */ |
455 | case -ERESTARTNOINTR: | |
fef2b580 DH |
456 | __frame->gr8 = __frame->orig_gr8; |
457 | __frame->pc -= 4; | |
1da177e4 LT |
458 | } |
459 | } | |
460 | ||
461 | /* Set up the stack frame */ | |
462 | if (ka->sa.sa_flags & SA_SIGINFO) | |
fef2b580 | 463 | ret = setup_rt_frame(sig, ka, info, oldset); |
1da177e4 | 464 | else |
fef2b580 | 465 | ret = setup_frame(sig, ka, oldset); |
8efc0ab5 | 466 | |
a411aee9 | 467 | if (ret == 0) { |
8efc0ab5 DH |
468 | spin_lock_irq(¤t->sighand->siglock); |
469 | sigorsets(¤t->blocked, ¤t->blocked, | |
470 | &ka->sa.sa_mask); | |
471 | if (!(ka->sa.sa_flags & SA_NODEFER)) | |
472 | sigaddset(¤t->blocked, sig); | |
473 | recalc_sigpending(); | |
474 | spin_unlock_irq(¤t->sighand->siglock); | |
475 | } | |
476 | ||
477 | return ret; | |
1da177e4 | 478 | |
1da177e4 LT |
479 | } /* end handle_signal() */ |
480 | ||
481 | /*****************************************************************************/ | |
482 | /* | |
483 | * Note that 'init' is a special process: it doesn't get signals it doesn't | |
484 | * want to handle. Thus you cannot kill init even with a SIGKILL even by | |
485 | * mistake. | |
486 | */ | |
a411aee9 | 487 | static void do_signal(void) |
1da177e4 LT |
488 | { |
489 | struct k_sigaction ka; | |
490 | siginfo_t info; | |
a411aee9 | 491 | sigset_t *oldset; |
1da177e4 LT |
492 | int signr; |
493 | ||
494 | /* | |
495 | * We want the common case to go fast, which | |
496 | * is why we may in certain cases get here from | |
497 | * kernel mode. Just return without doing anything | |
498 | * if so. | |
499 | */ | |
fef2b580 | 500 | if (!user_mode(__frame)) |
a411aee9 | 501 | return; |
1da177e4 | 502 | |
3e1d1d28 | 503 | if (try_to_freeze()) |
1da177e4 | 504 | goto no_signal; |
1da177e4 | 505 | |
a411aee9 DH |
506 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
507 | oldset = ¤t->saved_sigmask; | |
508 | else | |
1da177e4 LT |
509 | oldset = ¤t->blocked; |
510 | ||
fef2b580 | 511 | signr = get_signal_to_deliver(&info, &ka, __frame, NULL); |
a411aee9 DH |
512 | if (signr > 0) { |
513 | if (handle_signal(signr, &info, &ka, oldset) == 0) { | |
514 | /* a signal was successfully delivered; the saved | |
515 | * sigmask will have been stored in the signal frame, | |
516 | * and will be restored by sigreturn, so we can simply | |
517 | * clear the TIF_RESTORE_SIGMASK flag */ | |
518 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) | |
519 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
520 | } | |
521 | ||
522 | return; | |
523 | } | |
1da177e4 | 524 | |
8efc0ab5 | 525 | no_signal: |
1da177e4 | 526 | /* Did we come from a system call? */ |
fef2b580 | 527 | if (__frame->syscallno >= 0) { |
1da177e4 | 528 | /* Restart the system call - no handlers present */ |
a411aee9 DH |
529 | switch (__frame->gr8) { |
530 | case -ERESTARTNOHAND: | |
531 | case -ERESTARTSYS: | |
532 | case -ERESTARTNOINTR: | |
fef2b580 DH |
533 | __frame->gr8 = __frame->orig_gr8; |
534 | __frame->pc -= 4; | |
a411aee9 | 535 | break; |
1da177e4 | 536 | |
a411aee9 | 537 | case -ERESTART_RESTARTBLOCK: |
fef2b580 DH |
538 | __frame->gr8 = __NR_restart_syscall; |
539 | __frame->pc -= 4; | |
a411aee9 | 540 | break; |
1da177e4 LT |
541 | } |
542 | } | |
543 | ||
a411aee9 DH |
544 | /* if there's no signal to deliver, we just put the saved sigmask |
545 | * back */ | |
546 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) { | |
547 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
548 | sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); | |
549 | } | |
8efc0ab5 | 550 | |
1da177e4 LT |
551 | } /* end do_signal() */ |
552 | ||
553 | /*****************************************************************************/ | |
554 | /* | |
555 | * notification of userspace execution resumption | |
a411aee9 | 556 | * - triggered by the TIF_WORK_MASK flags |
1da177e4 LT |
557 | */ |
558 | asmlinkage void do_notify_resume(__u32 thread_info_flags) | |
559 | { | |
560 | /* pending single-step? */ | |
561 | if (thread_info_flags & _TIF_SINGLESTEP) | |
562 | clear_thread_flag(TIF_SINGLESTEP); | |
563 | ||
564 | /* deal with pending signal delivery */ | |
a411aee9 DH |
565 | if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)) |
566 | do_signal(); | |
1da177e4 LT |
567 | |
568 | } /* end do_notify_resume() */ |