Commit | Line | Data |
---|---|---|
5a0015d6 | 1 | /* |
29c4dfd9 | 2 | * arch/xtensa/kernel/signal.c |
5a0015d6 | 3 | * |
29c4dfd9 | 4 | * Default platform functions. |
5a0015d6 | 5 | * |
29c4dfd9 CZ |
6 | * This file is subject to the terms and conditions of the GNU General Public |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
5a0015d6 | 9 | * |
29c4dfd9 CZ |
10 | * Copyright (C) 2005, 2006 Tensilica Inc. |
11 | * Copyright (C) 1991, 1992 Linus Torvalds | |
12 | * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson | |
5a0015d6 | 13 | * |
29c4dfd9 CZ |
14 | * Chris Zankel <chris@zankel.net> |
15 | * Joe Taylor <joe@tensilica.com> | |
5a0015d6 CZ |
16 | */ |
17 | ||
5a0015d6 CZ |
18 | #include <linux/signal.h> |
19 | #include <linux/errno.h> | |
5a0015d6 | 20 | #include <linux/ptrace.h> |
5a0015d6 | 21 | #include <linux/personality.h> |
a53bb24e | 22 | #include <linux/tracehook.h> |
68db0cf1 | 23 | #include <linux/sched/task_stack.h> |
29c4dfd9 | 24 | |
5a0015d6 | 25 | #include <asm/ucontext.h> |
7c0f6ba6 | 26 | #include <linux/uaccess.h> |
5a0015d6 | 27 | #include <asm/cacheflush.h> |
29c4dfd9 CZ |
28 | #include <asm/coprocessor.h> |
29 | #include <asm/unistd.h> | |
5a0015d6 CZ |
30 | |
31 | #define DEBUG_SIG 0 | |
32 | ||
5a0015d6 CZ |
33 | extern struct task_struct *coproc_owners[]; |
34 | ||
29c4dfd9 CZ |
35 | struct rt_sigframe |
36 | { | |
37 | struct siginfo info; | |
38 | struct ucontext uc; | |
c658eac6 CZ |
39 | struct { |
40 | xtregs_opt_t opt; | |
41 | xtregs_user_t user; | |
42 | #if XTENSA_HAVE_COPROCESSORS | |
43 | xtregs_coprocessor_t cp; | |
44 | #endif | |
45 | } xtregs; | |
29c4dfd9 CZ |
46 | unsigned char retcode[6]; |
47 | unsigned int window[4]; | |
48 | }; | |
49 | ||
50 | /* | |
51 | * Flush register windows stored in pt_regs to stack. | |
52 | * Returns 1 for errors. | |
5a0015d6 CZ |
53 | */ |
54 | ||
29c4dfd9 CZ |
55 | int |
56 | flush_window_regs_user(struct pt_regs *regs) | |
5a0015d6 | 57 | { |
29c4dfd9 CZ |
58 | const unsigned long ws = regs->windowstart; |
59 | const unsigned long wb = regs->windowbase; | |
60 | unsigned long sp = 0; | |
61 | unsigned long wm; | |
62 | int err = 1; | |
63 | int base; | |
5a0015d6 | 64 | |
29c4dfd9 | 65 | /* Return if no other frames. */ |
5a0015d6 | 66 | |
29c4dfd9 CZ |
67 | if (regs->wmask == 1) |
68 | return 0; | |
5a0015d6 | 69 | |
29c4dfd9 | 70 | /* Rotate windowmask and skip empty frames. */ |
5a0015d6 | 71 | |
29c4dfd9 CZ |
72 | wm = (ws >> wb) | (ws << (XCHAL_NUM_AREGS / 4 - wb)); |
73 | base = (XCHAL_NUM_AREGS / 4) - (regs->wmask >> 4); | |
74 | ||
75 | /* For call8 or call12 frames, we need the previous stack pointer. */ | |
5a0015d6 | 76 | |
29c4dfd9 CZ |
77 | if ((regs->wmask & 2) == 0) |
78 | if (__get_user(sp, (int*)(regs->areg[base * 4 + 1] - 12))) | |
79 | goto errout; | |
5a0015d6 | 80 | |
29c4dfd9 | 81 | /* Spill frames to stack. */ |
5a0015d6 | 82 | |
29c4dfd9 | 83 | while (base < XCHAL_NUM_AREGS / 4) { |
5a0015d6 | 84 | |
29c4dfd9 CZ |
85 | int m = (wm >> base); |
86 | int inc = 0; | |
5a0015d6 | 87 | |
29c4dfd9 | 88 | /* Save registers a4..a7 (call8) or a4...a11 (call12) */ |
5a0015d6 | 89 | |
29c4dfd9 CZ |
90 | if (m & 2) { /* call4 */ |
91 | inc = 1; | |
5a0015d6 | 92 | |
29c4dfd9 CZ |
93 | } else if (m & 4) { /* call8 */ |
94 | if (copy_to_user((void*)(sp - 32), | |
95 | ®s->areg[(base + 1) * 4], 16)) | |
96 | goto errout; | |
97 | inc = 2; | |
5a0015d6 | 98 | |
29c4dfd9 CZ |
99 | } else if (m & 8) { /* call12 */ |
100 | if (copy_to_user((void*)(sp - 48), | |
101 | ®s->areg[(base + 1) * 4], 32)) | |
102 | goto errout; | |
103 | inc = 3; | |
104 | } | |
5a0015d6 | 105 | |
29c4dfd9 | 106 | /* Save current frame a0..a3 under next SP */ |
5a0015d6 | 107 | |
29c4dfd9 CZ |
108 | sp = regs->areg[((base + inc) * 4 + 1) % XCHAL_NUM_AREGS]; |
109 | if (copy_to_user((void*)(sp - 16), ®s->areg[base * 4], 16)) | |
110 | goto errout; | |
111 | ||
112 | /* Get current stack pointer for next loop iteration. */ | |
113 | ||
114 | sp = regs->areg[base * 4 + 1]; | |
115 | base += inc; | |
116 | } | |
117 | ||
3befce8f CZ |
118 | regs->wmask = 1; |
119 | regs->windowstart = 1 << wb; | |
120 | ||
29c4dfd9 | 121 | return 0; |
5a0015d6 | 122 | |
29c4dfd9 CZ |
123 | errout: |
124 | return err; | |
125 | } | |
5a0015d6 CZ |
126 | |
127 | /* | |
29c4dfd9 CZ |
128 | * Note: We don't copy double exception 'regs', we have to finish double exc. |
129 | * first before we return to signal handler! This dbl.exc.handler might cause | |
130 | * another double exception, but I think we are fine as the situation is the | |
131 | * same as if we had returned to the signal handerl and got an interrupt | |
132 | * immediately... | |
5a0015d6 CZ |
133 | */ |
134 | ||
29c4dfd9 | 135 | static int |
c658eac6 | 136 | setup_sigcontext(struct rt_sigframe __user *frame, struct pt_regs *regs) |
5a0015d6 | 137 | { |
c658eac6 CZ |
138 | struct sigcontext __user *sc = &frame->uc.uc_mcontext; |
139 | struct thread_info *ti = current_thread_info(); | |
29c4dfd9 | 140 | int err = 0; |
5a0015d6 | 141 | |
29c4dfd9 CZ |
142 | #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
143 | COPY(pc); | |
144 | COPY(ps); | |
145 | COPY(lbeg); | |
146 | COPY(lend); | |
147 | COPY(lcount); | |
148 | COPY(sar); | |
149 | #undef COPY | |
5a0015d6 | 150 | |
29c4dfd9 CZ |
151 | err |= flush_window_regs_user(regs); |
152 | err |= __copy_to_user (sc->sc_a, regs->areg, 16 * 4); | |
c658eac6 | 153 | err |= __put_user(0, &sc->sc_xtregs); |
5a0015d6 | 154 | |
c658eac6 CZ |
155 | if (err) |
156 | return err; | |
5a0015d6 | 157 | |
c658eac6 CZ |
158 | #if XTENSA_HAVE_COPROCESSORS |
159 | coprocessor_flush_all(ti); | |
160 | coprocessor_release_all(ti); | |
161 | err |= __copy_to_user(&frame->xtregs.cp, &ti->xtregs_cp, | |
162 | sizeof (frame->xtregs.cp)); | |
5a0015d6 | 163 | #endif |
c658eac6 CZ |
164 | err |= __copy_to_user(&frame->xtregs.opt, ®s->xtregs_opt, |
165 | sizeof (xtregs_opt_t)); | |
166 | err |= __copy_to_user(&frame->xtregs.user, &ti->xtregs_user, | |
167 | sizeof (xtregs_user_t)); | |
168 | ||
169 | err |= __put_user(err ? NULL : &frame->xtregs, &sc->sc_xtregs); | |
5a0015d6 | 170 | |
29c4dfd9 CZ |
171 | return err; |
172 | } | |
5a0015d6 CZ |
173 | |
174 | static int | |
c658eac6 | 175 | restore_sigcontext(struct pt_regs *regs, struct rt_sigframe __user *frame) |
5a0015d6 | 176 | { |
c658eac6 CZ |
177 | struct sigcontext __user *sc = &frame->uc.uc_mcontext; |
178 | struct thread_info *ti = current_thread_info(); | |
5a0015d6 CZ |
179 | unsigned int err = 0; |
180 | unsigned long ps; | |
5a0015d6 CZ |
181 | |
182 | #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) | |
183 | COPY(pc); | |
5a0015d6 CZ |
184 | COPY(lbeg); |
185 | COPY(lend); | |
186 | COPY(lcount); | |
187 | COPY(sar); | |
5a0015d6 CZ |
188 | #undef COPY |
189 | ||
29c4dfd9 CZ |
190 | /* All registers were flushed to stack. Start with a prestine frame. */ |
191 | ||
192 | regs->wmask = 1; | |
193 | regs->windowbase = 0; | |
194 | regs->windowstart = 1; | |
195 | ||
c658eac6 CZ |
196 | regs->syscall = -1; /* disable syscall checks */ |
197 | ||
5a0015d6 CZ |
198 | /* For PS, restore only PS.CALLINC. |
199 | * Assume that all other bits are either the same as for the signal | |
200 | * handler, or the user mode value doesn't matter (e.g. PS.OWB). | |
201 | */ | |
202 | err |= __get_user(ps, &sc->sc_ps); | |
29c4dfd9 | 203 | regs->ps = (regs->ps & ~PS_CALLINC_MASK) | (ps & PS_CALLINC_MASK); |
5a0015d6 CZ |
204 | |
205 | /* Additional corruption checks */ | |
206 | ||
5a0015d6 | 207 | if ((regs->lcount > 0) |
29c4dfd9 | 208 | && ((regs->lbeg > TASK_SIZE) || (regs->lend > TASK_SIZE)) ) |
5a0015d6 CZ |
209 | err = 1; |
210 | ||
29c4dfd9 | 211 | err |= __copy_from_user(regs->areg, sc->sc_a, 16 * 4); |
5a0015d6 | 212 | |
c658eac6 CZ |
213 | if (err) |
214 | return err; | |
215 | ||
c4c4594b | 216 | /* The signal handler may have used coprocessors in which |
29c4dfd9 CZ |
217 | * case they are still enabled. We disable them to force a |
218 | * reloading of the original task's CP state by the lazy | |
219 | * context-switching mechanisms of CP exception handling. | |
220 | * Also, we essentially discard any coprocessor state that the | |
221 | * signal handler created. */ | |
5a0015d6 | 222 | |
c658eac6 CZ |
223 | #if XTENSA_HAVE_COPROCESSORS |
224 | coprocessor_release_all(ti); | |
225 | err |= __copy_from_user(&ti->xtregs_cp, &frame->xtregs.cp, | |
226 | sizeof (frame->xtregs.cp)); | |
5a0015d6 | 227 | #endif |
c658eac6 CZ |
228 | err |= __copy_from_user(&ti->xtregs_user, &frame->xtregs.user, |
229 | sizeof (xtregs_user_t)); | |
230 | err |= __copy_from_user(®s->xtregs_opt, &frame->xtregs.opt, | |
231 | sizeof (xtregs_opt_t)); | |
5a0015d6 CZ |
232 | |
233 | return err; | |
234 | } | |
235 | ||
5a0015d6 | 236 | |
29c4dfd9 CZ |
237 | /* |
238 | * Do a signal return; undo the signal stack. | |
239 | */ | |
5a0015d6 | 240 | |
29c4dfd9 CZ |
241 | asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3, |
242 | long a4, long a5, struct pt_regs *regs) | |
5a0015d6 | 243 | { |
29c4dfd9 | 244 | struct rt_sigframe __user *frame; |
5a0015d6 | 245 | sigset_t set; |
5a0015d6 | 246 | int ret; |
29c4dfd9 | 247 | |
188f677f | 248 | /* Always make any pending restarted system calls return -EINTR */ |
f56141e3 | 249 | current->restart_block.fn = do_no_restart_syscall; |
188f677f | 250 | |
5a0015d6 | 251 | if (regs->depc > 64) |
29c4dfd9 CZ |
252 | panic("rt_sigreturn in double exception!\n"); |
253 | ||
254 | frame = (struct rt_sigframe __user *) regs->areg[1]; | |
5a0015d6 | 255 | |
b9e122c8 | 256 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
5a0015d6 CZ |
257 | goto badframe; |
258 | ||
259 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) | |
260 | goto badframe; | |
261 | ||
d12f7c4a | 262 | set_current_blocked(&set); |
5a0015d6 | 263 | |
c658eac6 | 264 | if (restore_sigcontext(regs, frame)) |
5a0015d6 | 265 | goto badframe; |
29c4dfd9 | 266 | |
5a0015d6 CZ |
267 | ret = regs->areg[2]; |
268 | ||
0430f2f2 | 269 | if (restore_altstack(&frame->uc.uc_stack)) |
5a0015d6 | 270 | goto badframe; |
5a0015d6 CZ |
271 | |
272 | return ret; | |
273 | ||
274 | badframe: | |
275 | force_sig(SIGSEGV, current); | |
276 | return 0; | |
277 | } | |
278 | ||
29c4dfd9 | 279 | |
5a0015d6 CZ |
280 | |
281 | /* | |
29c4dfd9 | 282 | * Set up a signal frame. |
5a0015d6 | 283 | */ |
5a0015d6 CZ |
284 | |
285 | static int | |
29c4dfd9 | 286 | gen_return_code(unsigned char *codemem) |
5a0015d6 | 287 | { |
5a0015d6 CZ |
288 | int err = 0; |
289 | ||
29c4dfd9 CZ |
290 | /* |
291 | * The 12-bit immediate is really split up within the 24-bit MOVI | |
292 | * instruction. As long as the above system call numbers fit within | |
293 | * 8-bits, the following code works fine. See the Xtensa ISA for | |
294 | * details. | |
5a0015d6 | 295 | */ |
5a0015d6 | 296 | |
29c4dfd9 CZ |
297 | #if __NR_rt_sigreturn > 255 |
298 | # error Generating the MOVI instruction below breaks! | |
5a0015d6 CZ |
299 | #endif |
300 | ||
5a0015d6 | 301 | #ifdef __XTENSA_EB__ /* Big Endian version */ |
29c4dfd9 CZ |
302 | /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ |
303 | err |= __put_user(0x22, &codemem[0]); | |
304 | err |= __put_user(0x0a, &codemem[1]); | |
305 | err |= __put_user(__NR_rt_sigreturn, &codemem[2]); | |
306 | /* Generate instruction: SYSCALL */ | |
307 | err |= __put_user(0x00, &codemem[3]); | |
308 | err |= __put_user(0x05, &codemem[4]); | |
309 | err |= __put_user(0x00, &codemem[5]); | |
5a0015d6 CZ |
310 | |
311 | #elif defined __XTENSA_EL__ /* Little Endian version */ | |
29c4dfd9 CZ |
312 | /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ |
313 | err |= __put_user(0x22, &codemem[0]); | |
314 | err |= __put_user(0xa0, &codemem[1]); | |
315 | err |= __put_user(__NR_rt_sigreturn, &codemem[2]); | |
316 | /* Generate instruction: SYSCALL */ | |
317 | err |= __put_user(0x00, &codemem[3]); | |
318 | err |= __put_user(0x50, &codemem[4]); | |
319 | err |= __put_user(0x00, &codemem[5]); | |
5a0015d6 | 320 | #else |
29c4dfd9 | 321 | # error Must use compiler for Xtensa processors. |
5a0015d6 | 322 | #endif |
5a0015d6 CZ |
323 | |
324 | /* Flush generated code out of the data cache */ | |
325 | ||
173d6681 CZ |
326 | if (err == 0) { |
327 | __invalidate_icache_range((unsigned long)codemem, 6UL); | |
328 | __flush_invalidate_dcache_range((unsigned long)codemem, 6UL); | |
329 | } | |
5a0015d6 CZ |
330 | |
331 | return err; | |
332 | } | |
333 | ||
5a0015d6 | 334 | |
5bdb7611 RW |
335 | static int setup_frame(struct ksignal *ksig, sigset_t *set, |
336 | struct pt_regs *regs) | |
5a0015d6 | 337 | { |
29c4dfd9 | 338 | struct rt_sigframe *frame; |
5bdb7611 | 339 | int err = 0, sig = ksig->sig; |
c50842df | 340 | unsigned long sp, ra, tp; |
5a0015d6 | 341 | |
29c4dfd9 | 342 | sp = regs->areg[1]; |
5a0015d6 | 343 | |
5bdb7611 | 344 | if ((ksig->ka.sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) { |
29c4dfd9 | 345 | sp = current->sas_ss_sp + current->sas_ss_size; |
5a0015d6 CZ |
346 | } |
347 | ||
29c4dfd9 | 348 | frame = (void *)((sp - sizeof(*frame)) & -16ul); |
5a0015d6 | 349 | |
5a0015d6 CZ |
350 | if (regs->depc > 64) |
351 | panic ("Double exception sys_sigreturn\n"); | |
352 | ||
29c4dfd9 | 353 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) { |
5bdb7611 | 354 | return -EFAULT; |
29c4dfd9 | 355 | } |
5a0015d6 | 356 | |
5bdb7611 RW |
357 | if (ksig->ka.sa.sa_flags & SA_SIGINFO) { |
358 | err |= copy_siginfo_to_user(&frame->info, &ksig->info); | |
29c4dfd9 CZ |
359 | } |
360 | ||
361 | /* Create the user context. */ | |
5a0015d6 | 362 | |
5a0015d6 CZ |
363 | err |= __put_user(0, &frame->uc.uc_flags); |
364 | err |= __put_user(0, &frame->uc.uc_link); | |
0430f2f2 | 365 | err |= __save_altstack(&frame->uc.uc_stack, regs->areg[1]); |
c658eac6 | 366 | err |= setup_sigcontext(frame, regs); |
5a0015d6 CZ |
367 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |
368 | ||
5bdb7611 RW |
369 | if (ksig->ka.sa.sa_flags & SA_RESTORER) { |
370 | ra = (unsigned long)ksig->ka.sa.sa_restorer; | |
44c64e6b | 371 | } else { |
5a0015d6 | 372 | |
44c64e6b | 373 | /* Create sys_rt_sigreturn syscall in stack frame */ |
29c4dfd9 | 374 | |
44c64e6b CZ |
375 | err |= gen_return_code(frame->retcode); |
376 | ||
377 | if (err) { | |
5bdb7611 | 378 | return -EFAULT; |
44c64e6b CZ |
379 | } |
380 | ra = (unsigned long) frame->retcode; | |
29c4dfd9 | 381 | } |
5a0015d6 | 382 | |
29c4dfd9 CZ |
383 | /* |
384 | * Create signal handler execution context. | |
5a0015d6 CZ |
385 | * Return context not modified until this point. |
386 | */ | |
29c4dfd9 | 387 | |
c50842df CZ |
388 | /* Set up registers for signal handler; preserve the threadptr */ |
389 | tp = regs->threadptr; | |
5bdb7611 | 390 | start_thread(regs, (unsigned long) ksig->ka.sa.sa_handler, |
29c4dfd9 CZ |
391 | (unsigned long) frame); |
392 | ||
393 | /* Set up a stack frame for a call4 | |
394 | * Note: PS.CALLINC is set to one by start_thread | |
395 | */ | |
29c4dfd9 | 396 | regs->areg[4] = (((unsigned long) ra) & 0x3fffffff) | 0x40000000; |
3e66701c | 397 | regs->areg[6] = (unsigned long) sig; |
29c4dfd9 CZ |
398 | regs->areg[7] = (unsigned long) &frame->info; |
399 | regs->areg[8] = (unsigned long) &frame->uc; | |
c50842df | 400 | regs->threadptr = tp; |
5a0015d6 | 401 | |
5a0015d6 CZ |
402 | #if DEBUG_SIG |
403 | printk("SIG rt deliver (%s:%d): signal=%d sp=%p pc=%08x\n", | |
3e66701c | 404 | current->comm, current->pid, sig, frame, regs->pc); |
5a0015d6 CZ |
405 | #endif |
406 | ||
3785006a | 407 | return 0; |
5a0015d6 CZ |
408 | } |
409 | ||
5a0015d6 CZ |
410 | /* |
411 | * Note that 'init' is a special process: it doesn't get signals it doesn't | |
412 | * want to handle. Thus you cannot kill init even with a SIGKILL even by | |
413 | * mistake. | |
414 | * | |
415 | * Note that we go through the signals twice: once to check the signals that | |
416 | * the kernel can handle, and then we build all the user-level signal handling | |
417 | * stack-frames in one go after that. | |
418 | */ | |
a53bb24e | 419 | static void do_signal(struct pt_regs *regs) |
5a0015d6 | 420 | { |
5bdb7611 | 421 | struct ksignal ksig; |
5a0015d6 | 422 | |
29c4dfd9 CZ |
423 | task_pt_regs(current)->icountlevel = 0; |
424 | ||
5bdb7611 | 425 | if (get_signal(&ksig)) { |
9112a6b2 | 426 | int ret; |
29c4dfd9 CZ |
427 | |
428 | /* Are we from a system call? */ | |
429 | ||
430 | if ((signed)regs->syscall >= 0) { | |
5a0015d6 | 431 | |
29c4dfd9 CZ |
432 | /* If so, check system call restarting.. */ |
433 | ||
434 | switch (regs->areg[2]) { | |
435 | case -ERESTARTNOHAND: | |
436 | case -ERESTART_RESTARTBLOCK: | |
5a0015d6 CZ |
437 | regs->areg[2] = -EINTR; |
438 | break; | |
29c4dfd9 CZ |
439 | |
440 | case -ERESTARTSYS: | |
5bdb7611 | 441 | if (!(ksig.ka.sa.sa_flags & SA_RESTART)) { |
29c4dfd9 CZ |
442 | regs->areg[2] = -EINTR; |
443 | break; | |
444 | } | |
445 | /* fallthrough */ | |
446 | case -ERESTARTNOINTR: | |
447 | regs->areg[2] = regs->syscall; | |
448 | regs->pc -= 3; | |
449 | break; | |
450 | ||
451 | default: | |
452 | /* nothing to do */ | |
453 | if (regs->areg[2] != 0) | |
454 | break; | |
455 | } | |
5a0015d6 | 456 | } |
5a0015d6 | 457 | |
29c4dfd9 CZ |
458 | /* Whee! Actually deliver the signal. */ |
459 | /* Set up the stack frame */ | |
5bdb7611 RW |
460 | ret = setup_frame(&ksig, sigmask_to_save(), regs); |
461 | signal_setup_done(ret, &ksig, 0); | |
29c4dfd9 CZ |
462 | if (current->ptrace & PT_SINGLESTEP) |
463 | task_pt_regs(current)->icountlevel = 1; | |
5a0015d6 | 464 | |
9ccc9c75 | 465 | return; |
29c4dfd9 | 466 | } |
5a0015d6 | 467 | |
29c4dfd9 CZ |
468 | /* Did we come from a system call? */ |
469 | if ((signed) regs->syscall >= 0) { | |
470 | /* Restart the system call - no handlers present */ | |
471 | switch (regs->areg[2]) { | |
472 | case -ERESTARTNOHAND: | |
473 | case -ERESTARTSYS: | |
474 | case -ERESTARTNOINTR: | |
475 | regs->areg[2] = regs->syscall; | |
476 | regs->pc -= 3; | |
477 | break; | |
478 | case -ERESTART_RESTARTBLOCK: | |
479 | regs->areg[2] = __NR_restart_syscall; | |
480 | regs->pc -= 3; | |
481 | break; | |
482 | } | |
483 | } | |
9ccc9c75 AV |
484 | |
485 | /* If there's no signal to deliver, we just restore the saved mask. */ | |
51a7b448 | 486 | restore_saved_sigmask(); |
9ccc9c75 | 487 | |
29c4dfd9 CZ |
488 | if (current->ptrace & PT_SINGLESTEP) |
489 | task_pt_regs(current)->icountlevel = 1; | |
9ccc9c75 | 490 | return; |
5a0015d6 | 491 | } |
29c4dfd9 | 492 | |
a53bb24e AV |
493 | void do_notify_resume(struct pt_regs *regs) |
494 | { | |
a53bb24e AV |
495 | if (test_thread_flag(TIF_SIGPENDING)) |
496 | do_signal(regs); | |
497 | ||
a42c6ded | 498 | if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) |
a53bb24e | 499 | tracehook_notify_resume(regs); |
a53bb24e | 500 | } |