Pull acpi_device_handle_cleanup into release branch
[linux-2.6] / arch / sparc64 / kernel / signal.c
1 /*  $Id: signal.c,v 1.60 2002/02/09 19:49:31 davem Exp $
2  *  arch/sparc64/kernel/signal.c
3  *
4  *  Copyright (C) 1991, 1992  Linus Torvalds
5  *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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_SPARC32_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/unistd.h>
21 #include <linux/mm.h>
22 #include <linux/tty.h>
23 #include <linux/smp_lock.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/svr4.h>
30 #include <asm/pgtable.h>
31 #include <asm/fpumacro.h>
32 #include <asm/uctx.h>
33 #include <asm/siginfo.h>
34 #include <asm/visasm.h>
35
36 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
37
38 /* {set, get}context() needed for 64-bit SparcLinux userland. */
39 asmlinkage void sparc64_set_context(struct pt_regs *regs)
40 {
41         struct ucontext __user *ucp = (struct ucontext __user *)
42                 regs->u_regs[UREG_I0];
43         mc_gregset_t __user *grp;
44         unsigned long pc, npc, tstate;
45         unsigned long fp, i7;
46         unsigned char fenab;
47         int err;
48
49         flush_user_windows();
50         if (get_thread_wsaved()                                 ||
51             (((unsigned long)ucp) & (sizeof(unsigned long)-1))  ||
52             (!__access_ok(ucp, sizeof(*ucp))))
53                 goto do_sigsegv;
54         grp  = &ucp->uc_mcontext.mc_gregs;
55         err  = __get_user(pc, &((*grp)[MC_PC]));
56         err |= __get_user(npc, &((*grp)[MC_NPC]));
57         if (err || ((pc | npc) & 3))
58                 goto do_sigsegv;
59         if (regs->u_regs[UREG_I1]) {
60                 sigset_t set;
61
62                 if (_NSIG_WORDS == 1) {
63                         if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
64                                 goto do_sigsegv;
65                 } else {
66                         if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
67                                 goto do_sigsegv;
68                 }
69                 sigdelsetmask(&set, ~_BLOCKABLE);
70                 spin_lock_irq(&current->sighand->siglock);
71                 current->blocked = set;
72                 recalc_sigpending();
73                 spin_unlock_irq(&current->sighand->siglock);
74         }
75         if (test_thread_flag(TIF_32BIT)) {
76                 pc &= 0xffffffff;
77                 npc &= 0xffffffff;
78         }
79         regs->tpc = pc;
80         regs->tnpc = npc;
81         err |= __get_user(regs->y, &((*grp)[MC_Y]));
82         err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
83         regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
84         regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
85         err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
86         err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
87         err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
88         err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
89         err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
90         err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
91         err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
92         err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
93         err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
94         err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
95         err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
96         err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
97         err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
98         err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
99         err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
100
101         err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
102         err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
103         err |= __put_user(fp,
104               (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
105         err |= __put_user(i7,
106               (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
107
108         err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
109         if (fenab) {
110                 unsigned long *fpregs = current_thread_info()->fpregs;
111                 unsigned long fprs;
112                 
113                 fprs_write(0);
114                 err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
115                 if (fprs & FPRS_DL)
116                         err |= copy_from_user(fpregs,
117                                               &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
118                                               (sizeof(unsigned int) * 32));
119                 if (fprs & FPRS_DU)
120                         err |= copy_from_user(fpregs+16,
121                          ((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
122                          (sizeof(unsigned int) * 32));
123                 err |= __get_user(current_thread_info()->xfsr[0],
124                                   &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
125                 err |= __get_user(current_thread_info()->gsr[0],
126                                   &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
127                 regs->tstate &= ~TSTATE_PEF;
128         }
129         if (err)
130                 goto do_sigsegv;
131
132         return;
133 do_sigsegv:
134         force_sig(SIGSEGV, current);
135 }
136
137 asmlinkage void sparc64_get_context(struct pt_regs *regs)
138 {
139         struct ucontext __user *ucp = (struct ucontext __user *)
140                 regs->u_regs[UREG_I0];
141         mc_gregset_t __user *grp;
142         mcontext_t __user *mcp;
143         unsigned long fp, i7;
144         unsigned char fenab;
145         int err;
146
147         synchronize_user_stack();
148         if (get_thread_wsaved() || clear_user(ucp, sizeof(*ucp)))
149                 goto do_sigsegv;
150
151 #if 1
152         fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */
153 #else
154         fenab = (current_thread_info()->fpsaved[0] & FPRS_FEF);
155 #endif
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 /* Align macros */
239 #define RT_ALIGNEDSZ  (((sizeof(struct rt_signal_frame) + 7) & (~7)))
240
241 static long _sigpause_common(old_sigset_t set)
242 {
243         set &= _BLOCKABLE;
244         spin_lock_irq(&current->sighand->siglock);
245         current->saved_sigmask = current->blocked;
246         siginitset(&current->blocked, set);
247         recalc_sigpending();
248         spin_unlock_irq(&current->sighand->siglock);
249
250         current->state = TASK_INTERRUPTIBLE;
251         schedule();
252         set_thread_flag(TIF_RESTORE_SIGMASK);
253         return -ERESTARTNOHAND;
254 }
255
256 asmlinkage long sys_sigpause(unsigned int set)
257 {
258         return _sigpause_common(set);
259 }
260
261 asmlinkage long sys_sigsuspend(old_sigset_t set)
262 {
263         return _sigpause_common(set);
264 }
265
266 static inline int
267 restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
268 {
269         unsigned long *fpregs = current_thread_info()->fpregs;
270         unsigned long fprs;
271         int err;
272
273         err = __get_user(fprs, &fpu->si_fprs);
274         fprs_write(0);
275         regs->tstate &= ~TSTATE_PEF;
276         if (fprs & FPRS_DL)
277                 err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
278                                (sizeof(unsigned int) * 32));
279         if (fprs & FPRS_DU)
280                 err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
281                                (sizeof(unsigned int) * 32));
282         err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
283         err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
284         current_thread_info()->fpsaved[0] |= fprs;
285         return err;
286 }
287
288 void do_rt_sigreturn(struct pt_regs *regs)
289 {
290         struct rt_signal_frame __user *sf;
291         unsigned long tpc, tnpc, tstate;
292         __siginfo_fpu_t __user *fpu_save;
293         mm_segment_t old_fs;
294         sigset_t set;
295         stack_t st;
296         int err;
297
298         /* Always make any pending restarted system calls return -EINTR */
299         current_thread_info()->restart_block.fn = do_no_restart_syscall;
300
301         synchronize_user_stack ();
302         sf = (struct rt_signal_frame __user *)
303                 (regs->u_regs [UREG_FP] + STACK_BIAS);
304
305         /* 1. Make sure we are not getting garbage from the user */
306         if (((unsigned long) sf) & 3)
307                 goto segv;
308
309         err = get_user(tpc, &sf->regs.tpc);
310         err |= __get_user(tnpc, &sf->regs.tnpc);
311         if (test_thread_flag(TIF_32BIT)) {
312                 tpc &= 0xffffffff;
313                 tnpc &= 0xffffffff;
314         }
315         err |= ((tpc | tnpc) & 3);
316
317         /* 2. Restore the state */
318         err |= __get_user(regs->y, &sf->regs.y);
319         err |= __get_user(tstate, &sf->regs.tstate);
320         err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
321
322         /* User can only change condition codes and %asi in %tstate. */
323         regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
324         regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
325
326         err |= __get_user(fpu_save, &sf->fpu_save);
327         if (fpu_save)
328                 err |= restore_fpu_state(regs, &sf->fpu_state);
329
330         err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
331         err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
332         
333         if (err)
334                 goto segv;
335                 
336         regs->tpc = tpc;
337         regs->tnpc = tnpc;
338         
339         /* It is more difficult to avoid calling this function than to
340            call it and ignore errors.  */
341         old_fs = get_fs();
342         set_fs(KERNEL_DS);
343         do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
344         set_fs(old_fs);
345
346         sigdelsetmask(&set, ~_BLOCKABLE);
347         spin_lock_irq(&current->sighand->siglock);
348         current->blocked = set;
349         recalc_sigpending();
350         spin_unlock_irq(&current->sighand->siglock);
351         return;
352 segv:
353         force_sig(SIGSEGV, current);
354 }
355
356 /* Checks if the fp is valid */
357 static int invalid_frame_pointer(void __user *fp, int fplen)
358 {
359         if (((unsigned long) fp) & 7)
360                 return 1;
361         return 0;
362 }
363
364 static inline int
365 save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
366 {
367         unsigned long *fpregs = (unsigned long *)(regs+1);
368         unsigned long fprs;
369         int err = 0;
370         
371         fprs = current_thread_info()->fpsaved[0];
372         if (fprs & FPRS_DL)
373                 err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
374                                     (sizeof(unsigned int) * 32));
375         if (fprs & FPRS_DU)
376                 err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
377                                     (sizeof(unsigned int) * 32));
378         err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
379         err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
380         err |= __put_user(fprs, &fpu->si_fprs);
381
382         return err;
383 }
384
385 static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
386 {
387         unsigned long sp;
388
389         sp = regs->u_regs[UREG_FP] + STACK_BIAS;
390
391         /* This is the X/Open sanctioned signal stack switching.  */
392         if (ka->sa.sa_flags & SA_ONSTACK) {
393                 if (!on_sig_stack(sp) &&
394                     !((current->sas_ss_sp + current->sas_ss_size) & 7))
395                         sp = current->sas_ss_sp + current->sas_ss_size;
396         }
397         return (void __user *)(sp - framesize);
398 }
399
400 static inline void
401 setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
402                int signo, sigset_t *oldset, siginfo_t *info)
403 {
404         struct rt_signal_frame __user *sf;
405         int sigframe_size, err;
406
407         /* 1. Make sure everything is clean */
408         synchronize_user_stack();
409         save_and_clear_fpu();
410         
411         sigframe_size = RT_ALIGNEDSZ;
412         if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
413                 sigframe_size -= sizeof(__siginfo_fpu_t);
414
415         sf = (struct rt_signal_frame __user *)
416                 get_sigframe(ka, regs, sigframe_size);
417         
418         if (invalid_frame_pointer (sf, sigframe_size))
419                 goto sigill;
420
421         if (get_thread_wsaved() != 0)
422                 goto sigill;
423
424         /* 2. Save the current process state */
425         err = copy_to_user(&sf->regs, regs, sizeof (*regs));
426
427         if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
428                 err |= save_fpu_state(regs, &sf->fpu_state);
429                 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
430         } else {
431                 err |= __put_user(0, &sf->fpu_save);
432         }
433         
434         /* Setup sigaltstack */
435         err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
436         err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
437         err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
438
439         err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
440
441         err |= copy_in_user((u64 __user *)sf,
442                             (u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS),
443                             sizeof(struct reg_window));
444
445         if (info)
446                 err |= copy_siginfo_to_user(&sf->info, info);
447         else {
448                 err |= __put_user(signo, &sf->info.si_signo);
449                 err |= __put_user(SI_NOINFO, &sf->info.si_code);
450         }
451         if (err)
452                 goto sigsegv;
453         
454         /* 3. signal handler back-trampoline and parameters */
455         regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
456         regs->u_regs[UREG_I0] = signo;
457         regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
458
459         /* The sigcontext is passed in this way because of how it
460          * is defined in GLIBC's /usr/include/bits/sigcontext.h
461          * for sparc64.  It includes the 128 bytes of siginfo_t.
462          */
463         regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
464
465         /* 5. signal handler */
466         regs->tpc = (unsigned long) ka->sa.sa_handler;
467         regs->tnpc = (regs->tpc + 4);
468         if (test_thread_flag(TIF_32BIT)) {
469                 regs->tpc &= 0xffffffff;
470                 regs->tnpc &= 0xffffffff;
471         }
472         /* 4. return to kernel instructions */
473         regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
474         return;
475
476 sigill:
477         do_exit(SIGILL);
478 sigsegv:
479         force_sigsegv(signo, current);
480 }
481
482 static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
483                                  siginfo_t *info,
484                                  sigset_t *oldset, struct pt_regs *regs)
485 {
486         setup_rt_frame(ka, regs, signr, oldset,
487                        (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
488         spin_lock_irq(&current->sighand->siglock);
489         sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
490         if (!(ka->sa.sa_flags & SA_NOMASK))
491                 sigaddset(&current->blocked,signr);
492         recalc_sigpending();
493         spin_unlock_irq(&current->sighand->siglock);
494 }
495
496 static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
497                                      struct sigaction *sa)
498 {
499         switch (regs->u_regs[UREG_I0]) {
500         case ERESTART_RESTARTBLOCK:
501         case ERESTARTNOHAND:
502         no_system_call_restart:
503                 regs->u_regs[UREG_I0] = EINTR;
504                 regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
505                 break;
506         case ERESTARTSYS:
507                 if (!(sa->sa_flags & SA_RESTART))
508                         goto no_system_call_restart;
509                 /* fallthrough */
510         case ERESTARTNOINTR:
511                 regs->u_regs[UREG_I0] = orig_i0;
512                 regs->tpc -= 4;
513                 regs->tnpc -= 4;
514         }
515 }
516
517 /* Note that 'init' is a special process: it doesn't get signals it doesn't
518  * want to handle. Thus you cannot kill init even with a SIGKILL even by
519  * mistake.
520  */
521 static void do_signal(struct pt_regs *regs, unsigned long orig_i0, int restart_syscall)
522 {
523         siginfo_t info;
524         struct signal_deliver_cookie cookie;
525         struct k_sigaction ka;
526         int signr;
527         sigset_t *oldset;
528         
529         cookie.restart_syscall = restart_syscall;
530         cookie.orig_i0 = orig_i0;
531
532         if (test_thread_flag(TIF_RESTORE_SIGMASK))
533                 oldset = &current->saved_sigmask;
534         else
535                 oldset = &current->blocked;
536
537 #ifdef CONFIG_SPARC32_COMPAT
538         if (test_thread_flag(TIF_32BIT)) {
539                 extern void do_signal32(sigset_t *, struct pt_regs *,
540                                         unsigned long, int);
541                 do_signal32(oldset, regs, orig_i0,
542                             cookie.restart_syscall);
543                 return;
544         }
545 #endif  
546
547         signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
548         if (signr > 0) {
549                 if (cookie.restart_syscall)
550                         syscall_restart(orig_i0, regs, &ka.sa);
551                 handle_signal(signr, &ka, &info, oldset, regs);
552
553                 /* a signal was successfully delivered; the saved
554                  * sigmask will have been stored in the signal frame,
555                  * and will be restored by sigreturn, so we can simply
556                  * clear the TIF_RESTORE_SIGMASK flag.
557                  */
558                 if (test_thread_flag(TIF_RESTORE_SIGMASK))
559                         clear_thread_flag(TIF_RESTORE_SIGMASK);
560                 return;
561         }
562         if (cookie.restart_syscall &&
563             (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
564              regs->u_regs[UREG_I0] == ERESTARTSYS ||
565              regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
566                 /* replay the system call when we are done */
567                 regs->u_regs[UREG_I0] = cookie.orig_i0;
568                 regs->tpc -= 4;
569                 regs->tnpc -= 4;
570         }
571         if (cookie.restart_syscall &&
572             regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
573                 regs->u_regs[UREG_G1] = __NR_restart_syscall;
574                 regs->tpc -= 4;
575                 regs->tnpc -= 4;
576         }
577
578         /* if there's no signal to deliver, we just put the saved sigmask
579          * back
580          */
581         if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
582                 clear_thread_flag(TIF_RESTORE_SIGMASK);
583                 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
584         }
585 }
586
587 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, int restart_syscall,
588                       unsigned long thread_info_flags)
589 {
590         if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
591                 do_signal(regs, orig_i0, restart_syscall);
592 }
593
594 void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
595 {
596         struct signal_deliver_cookie *cp = cookie;
597
598         if (cp->restart_syscall &&
599             (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
600              regs->u_regs[UREG_I0] == ERESTARTSYS ||
601              regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
602                 /* replay the system call when we are done */
603                 regs->u_regs[UREG_I0] = cp->orig_i0;
604                 regs->tpc -= 4;
605                 regs->tnpc -= 4;
606                 cp->restart_syscall = 0;
607         }
608         if (cp->restart_syscall &&
609             regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
610                 regs->u_regs[UREG_G1] = __NR_restart_syscall;
611                 regs->tpc -= 4;
612                 regs->tnpc -= 4;
613                 cp->restart_syscall = 0;
614         }
615 }