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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / arch / sparc / kernel / signal_64.c
blobc95bc7a05ac8ea12ca97dff71e4d50cf6124b5f6
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
35 #include "entry.h"
36 #include "systbls.h"
37
38 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
39
40 /* {set, get}context() needed for 64-bit SparcLinux userland. */
41 asmlinkage void sparc64_set_context(struct pt_regs *regs)
42 {
43 struct ucontext __user *ucp = (struct ucontext __user *)
44 regs->u_regs[UREG_I0];
45 mc_gregset_t __user *grp;
46 unsigned long pc, npc, tstate;
47 unsigned long fp, i7;
48 unsigned char fenab;
49 int err;
50
51 flush_user_windows();
52 if (get_thread_wsaved() ||
53 (((unsigned long)ucp) & (sizeof(unsigned long)-1)) ||
54 (!__access_ok(ucp, sizeof(*ucp))))
55 goto do_sigsegv;
56 grp = &ucp->uc_mcontext.mc_gregs;
57 err = __get_user(pc, &((*grp)[MC_PC]));
58 err |= __get_user(npc, &((*grp)[MC_NPC]));
59 if (err || ((pc | npc) & 3))
60 goto do_sigsegv;
61 if (regs->u_regs[UREG_I1]) {
62 sigset_t set;
63
64 if (_NSIG_WORDS == 1) {
65 if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
66 goto do_sigsegv;
67 } else {
68 if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
69 goto do_sigsegv;
70 }
71 sigdelsetmask(&set, ~_BLOCKABLE);
72 spin_lock_irq(&current->sighand->siglock);
73 current->blocked = set;
74 recalc_sigpending();
75 spin_unlock_irq(&current->sighand->siglock);
76 }
77 if (test_thread_flag(TIF_32BIT)) {
78 pc &= 0xffffffff;
79 npc &= 0xffffffff;
80 }
81 regs->tpc = pc;
82 regs->tnpc = npc;
83 err |= __get_user(regs->y, &((*grp)[MC_Y]));
84 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
85 regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
86 regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
87 err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
88 err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
89 err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
90 err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
91 err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
92 err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
93
94 /* Skip %g7 as that's the thread register in userspace. */
95
96 err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
97 err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
98 err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
99 err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
100 err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
101 err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
102 err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
103 err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
104
105 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
106 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
107 err |= __put_user(fp,
108 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
109 err |= __put_user(i7,
110 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
111
112 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
113 if (fenab) {
114 unsigned long *fpregs = current_thread_info()->fpregs;
115 unsigned long fprs;
116
117 fprs_write(0);
118 err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
119 if (fprs & FPRS_DL)
120 err |= copy_from_user(fpregs,
121 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
122 (sizeof(unsigned int) * 32));
123 if (fprs & FPRS_DU)
124 err |= copy_from_user(fpregs+16,
125 ((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
126 (sizeof(unsigned int) * 32));
127 err |= __get_user(current_thread_info()->xfsr[0],
128 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
129 err |= __get_user(current_thread_info()->gsr[0],
130 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
131 regs->tstate &= ~TSTATE_PEF;
132 }
133 if (err)
134 goto do_sigsegv;
135
136 return;
137 do_sigsegv:
138 force_sig(SIGSEGV, current);
139 }
140
141 asmlinkage void sparc64_get_context(struct pt_regs *regs)
142 {
143 struct ucontext __user *ucp = (struct ucontext __user *)
144 regs->u_regs[UREG_I0];
145 mc_gregset_t __user *grp;
146 mcontext_t __user *mcp;
147 unsigned long fp, i7;
148 unsigned char fenab;
149 int err;
150
151 synchronize_user_stack();
152 if (get_thread_wsaved() || clear_user(ucp, sizeof(*ucp)))
153 goto do_sigsegv;
154
155 fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */
156
157 mcp = &ucp->uc_mcontext;
158 grp = &mcp->mc_gregs;
159
160 /* Skip over the trap instruction, first. */
161 if (test_thread_flag(TIF_32BIT)) {
162 regs->tpc = (regs->tnpc & 0xffffffff);
163 regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
164 } else {
165 regs->tpc = regs->tnpc;
166 regs->tnpc += 4;
167 }
168 err = 0;
169 if (_NSIG_WORDS == 1)
170 err |= __put_user(current->blocked.sig[0],
171 (unsigned long __user *)&ucp->uc_sigmask);
172 else
173 err |= __copy_to_user(&ucp->uc_sigmask, &current->blocked,
174 sizeof(sigset_t));
175
176 err |= __put_user(regs->tstate, &((*grp)[MC_TSTATE]));
177 err |= __put_user(regs->tpc, &((*grp)[MC_PC]));
178 err |= __put_user(regs->tnpc, &((*grp)[MC_NPC]));
179 err |= __put_user(regs->y, &((*grp)[MC_Y]));
180 err |= __put_user(regs->u_regs[UREG_G1], &((*grp)[MC_G1]));
181 err |= __put_user(regs->u_regs[UREG_G2], &((*grp)[MC_G2]));
182 err |= __put_user(regs->u_regs[UREG_G3], &((*grp)[MC_G3]));
183 err |= __put_user(regs->u_regs[UREG_G4], &((*grp)[MC_G4]));
184 err |= __put_user(regs->u_regs[UREG_G5], &((*grp)[MC_G5]));
185 err |= __put_user(regs->u_regs[UREG_G6], &((*grp)[MC_G6]));
186 err |= __put_user(regs->u_regs[UREG_G7], &((*grp)[MC_G7]));
187 err |= __put_user(regs->u_regs[UREG_I0], &((*grp)[MC_O0]));
188 err |= __put_user(regs->u_regs[UREG_I1], &((*grp)[MC_O1]));
189 err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2]));
190 err |= __put_user(regs->u_regs[UREG_I3], &((*grp)[MC_O3]));
191 err |= __put_user(regs->u_regs[UREG_I4], &((*grp)[MC_O4]));
192 err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5]));
193 err |= __put_user(regs->u_regs[UREG_I6], &((*grp)[MC_O6]));
194 err |= __put_user(regs->u_regs[UREG_I7], &((*grp)[MC_O7]));
195
196 err |= __get_user(fp,
197 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
198 err |= __get_user(i7,
199 (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
200 err |= __put_user(fp, &(mcp->mc_fp));
201 err |= __put_user(i7, &(mcp->mc_i7));
202
203 err |= __put_user(fenab, &(mcp->mc_fpregs.mcfpu_enab));
204 if (fenab) {
205 unsigned long *fpregs = current_thread_info()->fpregs;
206 unsigned long fprs;
207
208 fprs = current_thread_info()->fpsaved[0];
209 if (fprs & FPRS_DL)
210 err |= copy_to_user(&(mcp->mc_fpregs.mcfpu_fregs), fpregs,
211 (sizeof(unsigned int) * 32));
212 if (fprs & FPRS_DU)
213 err |= copy_to_user(
214 ((unsigned long __user *)&(mcp->mc_fpregs.mcfpu_fregs))+16, fpregs+16,
215 (sizeof(unsigned int) * 32));
216 err |= __put_user(current_thread_info()->xfsr[0], &(mcp->mc_fpregs.mcfpu_fsr));
217 err |= __put_user(current_thread_info()->gsr[0], &(mcp->mc_fpregs.mcfpu_gsr));
218 err |= __put_user(fprs, &(mcp->mc_fpregs.mcfpu_fprs));
219 }
220 if (err)
221 goto do_sigsegv;
222
223 return;
224 do_sigsegv:
225 force_sig(SIGSEGV, current);
226 }
227
228 struct rt_signal_frame {
229 struct sparc_stackf ss;
230 siginfo_t info;
231 struct pt_regs regs;
232 __siginfo_fpu_t __user *fpu_save;
233 stack_t stack;
234 sigset_t mask;
235 __siginfo_fpu_t fpu_state;
236 };
237
238 static long _sigpause_common(old_sigset_t set)
239 {
240 set &= _BLOCKABLE;
241 spin_lock_irq(&current->sighand->siglock);
242 current->saved_sigmask = current->blocked;
243 siginitset(&current->blocked, set);
244 recalc_sigpending();
245 spin_unlock_irq(&current->sighand->siglock);
246
247 current->state = TASK_INTERRUPTIBLE;
248 schedule();
249
250 set_restore_sigmask();
251
252 return -ERESTARTNOHAND;
253 }
254
255 asmlinkage long sys_sigpause(unsigned int set)
256 {
257 return _sigpause_common(set);
258 }
259
260 asmlinkage long sys_sigsuspend(old_sigset_t set)
261 {
262 return _sigpause_common(set);
263 }
264
265 static inline int
266 restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
267 {
268 unsigned long *fpregs = current_thread_info()->fpregs;
269 unsigned long fprs;
270 int err;
271
272 err = __get_user(fprs, &fpu->si_fprs);
273 fprs_write(0);
274 regs->tstate &= ~TSTATE_PEF;
275 if (fprs & FPRS_DL)
276 err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
277 (sizeof(unsigned int) * 32));
278 if (fprs & FPRS_DU)
279 err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
280 (sizeof(unsigned int) * 32));
281 err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
282 err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
283 current_thread_info()->fpsaved[0] |= fprs;
284 return err;
285 }
286
287 void do_rt_sigreturn(struct pt_regs *regs)
288 {
289 struct rt_signal_frame __user *sf;
290 unsigned long tpc, tnpc, tstate;
291 __siginfo_fpu_t __user *fpu_save;
292 sigset_t set;
293 int err;
294
295 /* Always make any pending restarted system calls return -EINTR */
296 current_thread_info()->restart_block.fn = do_no_restart_syscall;
297
298 synchronize_user_stack ();
299 sf = (struct rt_signal_frame __user *)
300 (regs->u_regs [UREG_FP] + STACK_BIAS);
301
302 /* 1. Make sure we are not getting garbage from the user */
303 if (((unsigned long) sf) & 3)
304 goto segv;
305
306 err = get_user(tpc, &sf->regs.tpc);
307 err |= __get_user(tnpc, &sf->regs.tnpc);
308 if (test_thread_flag(TIF_32BIT)) {
309 tpc &= 0xffffffff;
310 tnpc &= 0xffffffff;
311 }
312 err |= ((tpc | tnpc) & 3);
313
314 /* 2. Restore the state */
315 err |= __get_user(regs->y, &sf->regs.y);
316 err |= __get_user(tstate, &sf->regs.tstate);
317 err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
318
319 /* User can only change condition codes and %asi in %tstate. */
320 regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
321 regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
322
323 err |= __get_user(fpu_save, &sf->fpu_save);
324 if (fpu_save)
325 err |= restore_fpu_state(regs, &sf->fpu_state);
326
327 err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
328 err |= do_sigaltstack(&sf->stack, NULL, (unsigned long)sf);
329
330 if (err)
331 goto segv;
332
333 regs->tpc = tpc;
334 regs->tnpc = tnpc;
335
336 /* Prevent syscall restart. */
337 pt_regs_clear_syscall(regs);
338
339 sigdelsetmask(&set, ~_BLOCKABLE);
340 spin_lock_irq(&current->sighand->siglock);
341 current->blocked = set;
342 recalc_sigpending();
343 spin_unlock_irq(&current->sighand->siglock);
344 return;
345 segv:
346 force_sig(SIGSEGV, current);
347 }
348
349 /* Checks if the fp is valid */
350 static int invalid_frame_pointer(void __user *fp, int fplen)
351 {
352 if (((unsigned long) fp) & 15)
353 return 1;
354 return 0;
355 }
356
357 static inline int
358 save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
359 {
360 unsigned long *fpregs = current_thread_info()->fpregs;
361 unsigned long fprs;
362 int err = 0;
363
364 fprs = current_thread_info()->fpsaved[0];
365 if (fprs & FPRS_DL)
366 err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
367 (sizeof(unsigned int) * 32));
368 if (fprs & FPRS_DU)
369 err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
370 (sizeof(unsigned int) * 32));
371 err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
372 err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
373 err |= __put_user(fprs, &fpu->si_fprs);
374
375 return err;
376 }
377
378 static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
379 {
380 unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
381
382 /*
383 * If we are on the alternate signal stack and would overflow it, don't.
384 * Return an always-bogus address instead so we will die with SIGSEGV.
385 */
386 if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
387 return (void __user *) -1L;
388
389 /* This is the X/Open sanctioned signal stack switching. */
390 if (ka->sa.sa_flags & SA_ONSTACK) {
391 if (sas_ss_flags(sp) == 0)
392 sp = current->sas_ss_sp + current->sas_ss_size;
393 }
394
395 sp -= framesize;
396
397 /* Always align the stack frame. This handles two cases. First,
398 * sigaltstack need not be mindful of platform specific stack
399 * alignment. Second, if we took this signal because the stack
400 * is not aligned properly, we'd like to take the signal cleanly
401 * and report that.
402 */
403 sp &= ~15UL;
404
405 return (void __user *) sp;
406 }
407
408 static inline int
409 setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
410 int signo, sigset_t *oldset, siginfo_t *info)
411 {
412 struct rt_signal_frame __user *sf;
413 int sigframe_size, err;
414
415 /* 1. Make sure everything is clean */
416 synchronize_user_stack();
417 save_and_clear_fpu();
418
419 sigframe_size = sizeof(struct rt_signal_frame);
420 if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
421 sigframe_size -= sizeof(__siginfo_fpu_t);
422
423 sf = (struct rt_signal_frame __user *)
424 get_sigframe(ka, regs, sigframe_size);
425
426 if (invalid_frame_pointer (sf, sigframe_size))
427 goto sigill;
428
429 if (get_thread_wsaved() != 0)
430 goto sigill;
431
432 /* 2. Save the current process state */
433 err = copy_to_user(&sf->regs, regs, sizeof (*regs));
434
435 if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
436 err |= save_fpu_state(regs, &sf->fpu_state);
437 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
438 } else {
439 err |= __put_user(0, &sf->fpu_save);
440 }
441
442 /* Setup sigaltstack */
443 err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
444 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
445 err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
446
447 err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
448
449 err |= copy_in_user((u64 __user *)sf,
450 (u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS),
451 sizeof(struct reg_window));
452
453 if (info)
454 err |= copy_siginfo_to_user(&sf->info, info);
455 else {
456 err |= __put_user(signo, &sf->info.si_signo);
457 err |= __put_user(SI_NOINFO, &sf->info.si_code);
458 }
459 if (err)
460 goto sigsegv;
461
462 /* 3. signal handler back-trampoline and parameters */
463 regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
464 regs->u_regs[UREG_I0] = signo;
465 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
466
467 /* The sigcontext is passed in this way because of how it
468 * is defined in GLIBC's /usr/include/bits/sigcontext.h
469 * for sparc64. It includes the 128 bytes of siginfo_t.
470 */
471 regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
472
473 /* 5. signal handler */
474 regs->tpc = (unsigned long) ka->sa.sa_handler;
475 regs->tnpc = (regs->tpc + 4);
476 if (test_thread_flag(TIF_32BIT)) {
477 regs->tpc &= 0xffffffff;
478 regs->tnpc &= 0xffffffff;
479 }
480 /* 4. return to kernel instructions */
481 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
482 return 0;
483
484 sigill:
485 do_exit(SIGILL);
486 return -EINVAL;
487
488 sigsegv:
489 force_sigsegv(signo, current);
490 return -EFAULT;
491 }
492
493 static inline int handle_signal(unsigned long signr, struct k_sigaction *ka,
494 siginfo_t *info,
495 sigset_t *oldset, struct pt_regs *regs)
496 {
497 int err;
498
499 err = setup_rt_frame(ka, regs, signr, oldset,
500 (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
501 if (err)
502 return err;
503 spin_lock_irq(&current->sighand->siglock);
504 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
505 if (!(ka->sa.sa_flags & SA_NOMASK))
506 sigaddset(&current->blocked,signr);
507 recalc_sigpending();
508 spin_unlock_irq(&current->sighand->siglock);
509
510 tracehook_signal_handler(signr, info, ka, regs, 0);
511
512 return 0;
513 }
514
515 static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
516 struct sigaction *sa)
517 {
518 switch (regs->u_regs[UREG_I0]) {
519 case ERESTART_RESTARTBLOCK:
520 case ERESTARTNOHAND:
521 no_system_call_restart:
522 regs->u_regs[UREG_I0] = EINTR;
523 regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
524 break;
525 case ERESTARTSYS:
526 if (!(sa->sa_flags & SA_RESTART))
527 goto no_system_call_restart;
528 /* fallthrough */
529 case ERESTARTNOINTR:
530 regs->u_regs[UREG_I0] = orig_i0;
531 regs->tpc -= 4;
532 regs->tnpc -= 4;
533 }
534 }
535
536 /* Note that 'init' is a special process: it doesn't get signals it doesn't
537 * want to handle. Thus you cannot kill init even with a SIGKILL even by
538 * mistake.
539 */
540 static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
541 {
542 struct k_sigaction ka;
543 int restart_syscall;
544 sigset_t *oldset;
545 siginfo_t info;
546 int signr;
547
548 if (pt_regs_is_syscall(regs) &&
549 (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
550 restart_syscall = 1;
551 } else
552 restart_syscall = 0;
553
554 if (current_thread_info()->status & TS_RESTORE_SIGMASK)
555 oldset = &current->saved_sigmask;
556 else
557 oldset = &current->blocked;
558
559 #ifdef CONFIG_COMPAT
560 if (test_thread_flag(TIF_32BIT)) {
561 extern void do_signal32(sigset_t *, struct pt_regs *,
562 int restart_syscall,
563 unsigned long orig_i0);
564 do_signal32(oldset, regs, restart_syscall, orig_i0);
565 return;
566 }
567 #endif
568
569 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
570
571 /* If the debugger messes with the program counter, it clears
572 * the software "in syscall" bit, directing us to not perform
573 * a syscall restart.
574 */
575 if (restart_syscall && !pt_regs_is_syscall(regs))
576 restart_syscall = 0;
577
578 if (signr > 0) {
579 if (restart_syscall)
580 syscall_restart(orig_i0, regs, &ka.sa);
581 if (handle_signal(signr, &ka, &info, oldset, regs) == 0) {
582 /* A signal was successfully delivered; the saved
583 * sigmask will have been stored in the signal frame,
584 * and will be restored by sigreturn, so we can simply
585 * clear the TS_RESTORE_SIGMASK flag.
586 */
587 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
588 }
589 return;
590 }
591 if (restart_syscall &&
592 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
593 regs->u_regs[UREG_I0] == ERESTARTSYS ||
594 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
595 /* replay the system call when we are done */
596 regs->u_regs[UREG_I0] = orig_i0;
597 regs->tpc -= 4;
598 regs->tnpc -= 4;
599 pt_regs_clear_syscall(regs);
600 }
601 if (restart_syscall &&
602 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
603 regs->u_regs[UREG_G1] = __NR_restart_syscall;
604 regs->tpc -= 4;
605 regs->tnpc -= 4;
606 pt_regs_clear_syscall(regs);
607 }
608
609 /* If there's no signal to deliver, we just put the saved sigmask
610 * back
611 */
612 if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
613 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
614 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
615 }
616 }
617
618 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
619 {
620 if (thread_info_flags & _TIF_SIGPENDING)
621 do_signal(regs, orig_i0);
622 if (thread_info_flags & _TIF_NOTIFY_RESUME) {
623 clear_thread_flag(TIF_NOTIFY_RESUME);
624 tracehook_notify_resume(regs);
625 if (current->replacement_session_keyring)
626 key_replace_session_keyring();
627 }
628 }
Tomato firmware and modifications.