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sparc: bury the sys_sigpause() remains
[deliverable/linux.git] / arch / sparc / kernel / signal_64.c
1 /*
2 * arch/sparc64/kernel/signal.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 */
10
11 #ifdef CONFIG_COMPAT
12 #include <linux/compat.h> /* for compat_old_sigset_t */
13 #endif
14 #include <linux/sched.h>
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/tracehook.h>
21 #include <linux/unistd.h>
22 #include <linux/mm.h>
23 #include <linux/tty.h>
24 #include <linux/binfmts.h>
25 #include <linux/bitops.h>
26
27 #include <asm/uaccess.h>
28 #include <asm/ptrace.h>
29 #include <asm/pgtable.h>
30 #include <asm/fpumacro.h>
31 #include <asm/uctx.h>
32 #include <asm/siginfo.h>
33 #include <asm/visasm.h>
34 #include <asm/switch_to.h>
35 #include <asm/cacheflush.h>
36
37 #include "entry.h"
38 #include "systbls.h"
39 #include "sigutil.h"
40
41 /* {set, get}context() needed for 64-bit SparcLinux userland. */
42 asmlinkage void sparc64_set_context(struct pt_regs *regs)
43 {
44 struct ucontext __user *ucp = (struct ucontext __user *)
45 regs->u_regs[UREG_I0];
46 mc_gregset_t __user *grp;
47 unsigned long pc, npc, tstate;
48 unsigned long fp, i7;
49 unsigned char fenab;
50 int err;
51
52 flush_user_windows();
53 if (get_thread_wsaved() ||
54 (((unsigned long)ucp) & (sizeof(unsigned long)-1)) ||
55 (!__access_ok(ucp, sizeof(*ucp))))
56 goto do_sigsegv;
57 grp = &ucp->uc_mcontext.mc_gregs;
58 err = __get_user(pc, &((*grp)[MC_PC]));
59 err |= __get_user(npc, &((*grp)[MC_NPC]));
60 if (err || ((pc | npc) & 3))
61 goto do_sigsegv;
62 if (regs->u_regs[UREG_I1]) {
63 sigset_t set;
64
65 if (_NSIG_WORDS == 1) {
66 if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
67 goto do_sigsegv;
68 } else {
69 if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
70 goto do_sigsegv;
71 }
72 set_current_blocked(&set);
73 }
74 if (test_thread_flag(TIF_32BIT)) {
75 pc &= 0xffffffff;
76 npc &= 0xffffffff;
77 }
78 regs->tpc = pc;
79 regs->tnpc = npc;
80 err |= __get_user(regs->y, &((*grp)[MC_Y]));
81 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
82 regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
83 regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
84 err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
85 err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
86 err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
87 err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
88 err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
89 err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
90
91 /* Skip %g7 as that's the thread register in userspace. */
92
93 err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
94 err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
95 err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
96 err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
97 err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
98 err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
99 err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
100 err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
101
102 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
103 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
104 err |= __put_user(fp,
105 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
106 err |= __put_user(i7,
107 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
108
109 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
110 if (fenab) {
111 unsigned long *fpregs = current_thread_info()->fpregs;
112 unsigned long fprs;
113
114 fprs_write(0);
115 err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
116 if (fprs & FPRS_DL)
117 err |= copy_from_user(fpregs,
118 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
119 (sizeof(unsigned int) * 32));
120 if (fprs & FPRS_DU)
121 err |= copy_from_user(fpregs+16,
122 ((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
123 (sizeof(unsigned int) * 32));
124 err |= __get_user(current_thread_info()->xfsr[0],
125 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
126 err |= __get_user(current_thread_info()->gsr[0],
127 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
128 regs->tstate &= ~TSTATE_PEF;
129 }
130 if (err)
131 goto do_sigsegv;
132
133 return;
134 do_sigsegv:
135 force_sig(SIGSEGV, current);
136 }
137
138 asmlinkage void sparc64_get_context(struct pt_regs *regs)
139 {
140 struct ucontext __user *ucp = (struct ucontext __user *)
141 regs->u_regs[UREG_I0];
142 mc_gregset_t __user *grp;
143 mcontext_t __user *mcp;
144 unsigned long fp, i7;
145 unsigned char fenab;
146 int err;
147
148 synchronize_user_stack();
149 if (get_thread_wsaved() || clear_user(ucp, sizeof(*ucp)))
150 goto do_sigsegv;
151
152 #if 1
153 fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */
154 #else
155 fenab = (current_thread_info()->fpsaved[0] & FPRS_FEF);
156 #endif
157
158 mcp = &ucp->uc_mcontext;
159 grp = &mcp->mc_gregs;
160
161 /* Skip over the trap instruction, first. */
162 if (test_thread_flag(TIF_32BIT)) {
163 regs->tpc = (regs->tnpc & 0xffffffff);
164 regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
165 } else {
166 regs->tpc = regs->tnpc;
167 regs->tnpc += 4;
168 }
169 err = 0;
170 if (_NSIG_WORDS == 1)
171 err |= __put_user(current->blocked.sig[0],
172 (unsigned long __user *)&ucp->uc_sigmask);
173 else
174 err |= __copy_to_user(&ucp->uc_sigmask, &current->blocked,
175 sizeof(sigset_t));
176
177 err |= __put_user(regs->tstate, &((*grp)[MC_TSTATE]));
178 err |= __put_user(regs->tpc, &((*grp)[MC_PC]));
179 err |= __put_user(regs->tnpc, &((*grp)[MC_NPC]));
180 err |= __put_user(regs->y, &((*grp)[MC_Y]));
181 err |= __put_user(regs->u_regs[UREG_G1], &((*grp)[MC_G1]));
182 err |= __put_user(regs->u_regs[UREG_G2], &((*grp)[MC_G2]));
183 err |= __put_user(regs->u_regs[UREG_G3], &((*grp)[MC_G3]));
184 err |= __put_user(regs->u_regs[UREG_G4], &((*grp)[MC_G4]));
185 err |= __put_user(regs->u_regs[UREG_G5], &((*grp)[MC_G5]));
186 err |= __put_user(regs->u_regs[UREG_G6], &((*grp)[MC_G6]));
187 err |= __put_user(regs->u_regs[UREG_G7], &((*grp)[MC_G7]));
188 err |= __put_user(regs->u_regs[UREG_I0], &((*grp)[MC_O0]));
189 err |= __put_user(regs->u_regs[UREG_I1], &((*grp)[MC_O1]));
190 err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2]));
191 err |= __put_user(regs->u_regs[UREG_I3], &((*grp)[MC_O3]));
192 err |= __put_user(regs->u_regs[UREG_I4], &((*grp)[MC_O4]));
193 err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5]));
194 err |= __put_user(regs->u_regs[UREG_I6], &((*grp)[MC_O6]));
195 err |= __put_user(regs->u_regs[UREG_I7], &((*grp)[MC_O7]));
196
197 err |= __get_user(fp,
198 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
199 err |= __get_user(i7,
200 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
201 err |= __put_user(fp, &(mcp->mc_fp));
202 err |= __put_user(i7, &(mcp->mc_i7));
203
204 err |= __put_user(fenab, &(mcp->mc_fpregs.mcfpu_enab));
205 if (fenab) {
206 unsigned long *fpregs = current_thread_info()->fpregs;
207 unsigned long fprs;
208
209 fprs = current_thread_info()->fpsaved[0];
210 if (fprs & FPRS_DL)
211 err |= copy_to_user(&(mcp->mc_fpregs.mcfpu_fregs), fpregs,
212 (sizeof(unsigned int) * 32));
213 if (fprs & FPRS_DU)
214 err |= copy_to_user(
215 ((unsigned long __user *)&(mcp->mc_fpregs.mcfpu_fregs))+16, fpregs+16,
216 (sizeof(unsigned int) * 32));
217 err |= __put_user(current_thread_info()->xfsr[0], &(mcp->mc_fpregs.mcfpu_fsr));
218 err |= __put_user(current_thread_info()->gsr[0], &(mcp->mc_fpregs.mcfpu_gsr));
219 err |= __put_user(fprs, &(mcp->mc_fpregs.mcfpu_fprs));
220 }
221 if (err)
222 goto do_sigsegv;
223
224 return;
225 do_sigsegv:
226 force_sig(SIGSEGV, current);
227 }
228
229 struct rt_signal_frame {
230 struct sparc_stackf ss;
231 siginfo_t info;
232 struct pt_regs regs;
233 __siginfo_fpu_t __user *fpu_save;
234 stack_t stack;
235 sigset_t mask;
236 __siginfo_rwin_t *rwin_save;
237 };
238
239 asmlinkage long sys_sigsuspend(old_sigset_t set)
240 {
241 sigset_t blocked;
242 siginitset(&blocked, set);
243 return sigsuspend(&blocked);
244 }
245
246 void do_rt_sigreturn(struct pt_regs *regs)
247 {
248 struct rt_signal_frame __user *sf;
249 unsigned long tpc, tnpc, tstate;
250 __siginfo_fpu_t __user *fpu_save;
251 __siginfo_rwin_t __user *rwin_save;
252 sigset_t set;
253 int err;
254
255 /* Always make any pending restarted system calls return -EINTR */
256 current_thread_info()->restart_block.fn = do_no_restart_syscall;
257
258 synchronize_user_stack ();
259 sf = (struct rt_signal_frame __user *)
260 (regs->u_regs [UREG_FP] + STACK_BIAS);
261
262 /* 1. Make sure we are not getting garbage from the user */
263 if (((unsigned long) sf) & 3)
264 goto segv;
265
266 err = get_user(tpc, &sf->regs.tpc);
267 err |= __get_user(tnpc, &sf->regs.tnpc);
268 if (test_thread_flag(TIF_32BIT)) {
269 tpc &= 0xffffffff;
270 tnpc &= 0xffffffff;
271 }
272 err |= ((tpc | tnpc) & 3);
273
274 /* 2. Restore the state */
275 err |= __get_user(regs->y, &sf->regs.y);
276 err |= __get_user(tstate, &sf->regs.tstate);
277 err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
278
279 /* User can only change condition codes and %asi in %tstate. */
280 regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
281 regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
282
283 err |= __get_user(fpu_save, &sf->fpu_save);
284 if (!err && fpu_save)
285 err |= restore_fpu_state(regs, fpu_save);
286
287 err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
288 err |= restore_altstack(&sf->stack);
289 if (err)
290 goto segv;
291
292 err |= __get_user(rwin_save, &sf->rwin_save);
293 if (!err && rwin_save) {
294 if (restore_rwin_state(rwin_save))
295 goto segv;
296 }
297
298 regs->tpc = tpc;
299 regs->tnpc = tnpc;
300
301 /* Prevent syscall restart. */
302 pt_regs_clear_syscall(regs);
303
304 set_current_blocked(&set);
305 return;
306 segv:
307 force_sig(SIGSEGV, current);
308 }
309
310 /* Checks if the fp is valid */
311 static int invalid_frame_pointer(void __user *fp)
312 {
313 if (((unsigned long) fp) & 15)
314 return 1;
315 return 0;
316 }
317
318 static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
319 {
320 unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
321
322 /*
323 * If we are on the alternate signal stack and would overflow it, don't.
324 * Return an always-bogus address instead so we will die with SIGSEGV.
325 */
326 if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
327 return (void __user *) -1L;
328
329 /* This is the X/Open sanctioned signal stack switching. */
330 if (ka->sa.sa_flags & SA_ONSTACK) {
331 if (sas_ss_flags(sp) == 0)
332 sp = current->sas_ss_sp + current->sas_ss_size;
333 }
334
335 sp -= framesize;
336
337 /* Always align the stack frame. This handles two cases. First,
338 * sigaltstack need not be mindful of platform specific stack
339 * alignment. Second, if we took this signal because the stack
340 * is not aligned properly, we'd like to take the signal cleanly
341 * and report that.
342 */
343 sp &= ~15UL;
344
345 return (void __user *) sp;
346 }
347
348 static inline int
349 setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
350 int signo, sigset_t *oldset, siginfo_t *info)
351 {
352 struct rt_signal_frame __user *sf;
353 int wsaved, err, sf_size;
354 void __user *tail;
355
356 /* 1. Make sure everything is clean */
357 synchronize_user_stack();
358 save_and_clear_fpu();
359
360 wsaved = get_thread_wsaved();
361
362 sf_size = sizeof(struct rt_signal_frame);
363 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
364 sf_size += sizeof(__siginfo_fpu_t);
365 if (wsaved)
366 sf_size += sizeof(__siginfo_rwin_t);
367 sf = (struct rt_signal_frame __user *)
368 get_sigframe(ka, regs, sf_size);
369
370 if (invalid_frame_pointer (sf))
371 goto sigill;
372
373 tail = (sf + 1);
374
375 /* 2. Save the current process state */
376 err = copy_to_user(&sf->regs, regs, sizeof (*regs));
377
378 if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
379 __siginfo_fpu_t __user *fpu_save = tail;
380 tail += sizeof(__siginfo_fpu_t);
381 err |= save_fpu_state(regs, fpu_save);
382 err |= __put_user((u64)fpu_save, &sf->fpu_save);
383 } else {
384 err |= __put_user(0, &sf->fpu_save);
385 }
386 if (wsaved) {
387 __siginfo_rwin_t __user *rwin_save = tail;
388 tail += sizeof(__siginfo_rwin_t);
389 err |= save_rwin_state(wsaved, rwin_save);
390 err |= __put_user((u64)rwin_save, &sf->rwin_save);
391 set_thread_wsaved(0);
392 } else {
393 err |= __put_user(0, &sf->rwin_save);
394 }
395
396 /* Setup sigaltstack */
397 err |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
398
399 err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
400
401 if (!wsaved) {
402 err |= copy_in_user((u64 __user *)sf,
403 (u64 __user *)(regs->u_regs[UREG_FP] +
404 STACK_BIAS),
405 sizeof(struct reg_window));
406 } else {
407 struct reg_window *rp;
408
409 rp = &current_thread_info()->reg_window[wsaved - 1];
410 err |= copy_to_user(sf, rp, sizeof(struct reg_window));
411 }
412 if (info)
413 err |= copy_siginfo_to_user(&sf->info, info);
414 else {
415 err |= __put_user(signo, &sf->info.si_signo);
416 err |= __put_user(SI_NOINFO, &sf->info.si_code);
417 }
418 if (err)
419 goto sigsegv;
420
421 /* 3. signal handler back-trampoline and parameters */
422 regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
423 regs->u_regs[UREG_I0] = signo;
424 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
425
426 /* The sigcontext is passed in this way because of how it
427 * is defined in GLIBC's /usr/include/bits/sigcontext.h
428 * for sparc64. It includes the 128 bytes of siginfo_t.
429 */
430 regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
431
432 /* 5. signal handler */
433 regs->tpc = (unsigned long) ka->sa.sa_handler;
434 regs->tnpc = (regs->tpc + 4);
435 if (test_thread_flag(TIF_32BIT)) {
436 regs->tpc &= 0xffffffff;
437 regs->tnpc &= 0xffffffff;
438 }
439 /* 4. return to kernel instructions */
440 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
441 return 0;
442
443 sigill:
444 do_exit(SIGILL);
445 return -EINVAL;
446
447 sigsegv:
448 force_sigsegv(signo, current);
449 return -EFAULT;
450 }
451
452 static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
453 siginfo_t *info,
454 sigset_t *oldset, struct pt_regs *regs)
455 {
456 int err;
457
458 err = setup_rt_frame(ka, regs, signr, oldset,
459 (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
460 if (err)
461 return;
462
463 signal_delivered(signr, info, ka, regs, 0);
464 }
465
466 static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
467 struct sigaction *sa)
468 {
469 switch (regs->u_regs[UREG_I0]) {
470 case ERESTART_RESTARTBLOCK:
471 case ERESTARTNOHAND:
472 no_system_call_restart:
473 regs->u_regs[UREG_I0] = EINTR;
474 regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
475 break;
476 case ERESTARTSYS:
477 if (!(sa->sa_flags & SA_RESTART))
478 goto no_system_call_restart;
479 /* fallthrough */
480 case ERESTARTNOINTR:
481 regs->u_regs[UREG_I0] = orig_i0;
482 regs->tpc -= 4;
483 regs->tnpc -= 4;
484 }
485 }
486
487 /* Note that 'init' is a special process: it doesn't get signals it doesn't
488 * want to handle. Thus you cannot kill init even with a SIGKILL even by
489 * mistake.
490 */
491 static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
492 {
493 struct k_sigaction ka;
494 int restart_syscall;
495 sigset_t *oldset = sigmask_to_save();
496 siginfo_t info;
497 int signr;
498
499 /* It's a lot of work and synchronization to add a new ptrace
500 * register for GDB to save and restore in order to get
501 * orig_i0 correct for syscall restarts when debugging.
502 *
503 * Although it should be the case that most of the global
504 * registers are volatile across a system call, glibc already
505 * depends upon that fact that we preserve them. So we can't
506 * just use any global register to save away the orig_i0 value.
507 *
508 * In particular %g2, %g3, %g4, and %g5 are all assumed to be
509 * preserved across a system call trap by various pieces of
510 * code in glibc.
511 *
512 * %g7 is used as the "thread register". %g6 is not used in
513 * any fixed manner. %g6 is used as a scratch register and
514 * a compiler temporary, but it's value is never used across
515 * a system call. Therefore %g6 is usable for orig_i0 storage.
516 */
517 if (pt_regs_is_syscall(regs) &&
518 (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
519 regs->u_regs[UREG_G6] = orig_i0;
520
521 #ifdef CONFIG_COMPAT
522 if (test_thread_flag(TIF_32BIT)) {
523 extern void do_signal32(sigset_t *, struct pt_regs *);
524 do_signal32(oldset, regs);
525 return;
526 }
527 #endif
528
529 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
530
531 restart_syscall = 0;
532 if (pt_regs_is_syscall(regs) &&
533 (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
534 restart_syscall = 1;
535 orig_i0 = regs->u_regs[UREG_G6];
536 }
537
538 if (signr > 0) {
539 if (restart_syscall)
540 syscall_restart(orig_i0, regs, &ka.sa);
541 handle_signal(signr, &ka, &info, oldset, regs);
542 return;
543 }
544 if (restart_syscall &&
545 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
546 regs->u_regs[UREG_I0] == ERESTARTSYS ||
547 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
548 /* replay the system call when we are done */
549 regs->u_regs[UREG_I0] = orig_i0;
550 regs->tpc -= 4;
551 regs->tnpc -= 4;
552 pt_regs_clear_syscall(regs);
553 }
554 if (restart_syscall &&
555 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
556 regs->u_regs[UREG_G1] = __NR_restart_syscall;
557 regs->tpc -= 4;
558 regs->tnpc -= 4;
559 pt_regs_clear_syscall(regs);
560 }
561
562 /* If there's no signal to deliver, we just put the saved sigmask
563 * back
564 */
565 restore_saved_sigmask();
566 }
567
568 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
569 {
570 if (thread_info_flags & _TIF_SIGPENDING)
571 do_signal(regs, orig_i0);
572 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
573 clear_thread_flag(TIF_NOTIFY_RESUME);
574 tracehook_notify_resume(regs);
575 }
576 }
577
Linux kernel - Deliverables
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