Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[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 #include <linux/config.h>
12 #ifdef CONFIG_SPARC32_COMPAT
13 #include <linux/compat.h>       /* for compat_old_sigset_t */
14 #endif
15 #include <linux/sched.h>
16 #include <linux/kernel.h>
17 #include <linux/signal.h>
18 #include <linux/errno.h>
19 #include <linux/wait.h>
20 #include <linux/ptrace.h>
21 #include <linux/unistd.h>
22 #include <linux/mm.h>
23 #include <linux/tty.h>
24 #include <linux/smp_lock.h>
25 #include <linux/binfmts.h>
26 #include <linux/bitops.h>
27
28 #include <asm/uaccess.h>
29 #include <asm/ptrace.h>
30 #include <asm/svr4.h>
31 #include <asm/pgtable.h>
32 #include <asm/fpumacro.h>
33 #include <asm/uctx.h>
34 #include <asm/siginfo.h>
35 #include <asm/visasm.h>
36
37 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
38
39 /* {set, get}context() needed for 64-bit SparcLinux userland. */
40 asmlinkage void sparc64_set_context(struct pt_regs *regs)
41 {
42         struct ucontext __user *ucp = (struct ucontext __user *)
43                 regs->u_regs[UREG_I0];
44         mc_gregset_t __user *grp;
45         unsigned long pc, npc, tstate;
46         unsigned long fp, i7;
47         unsigned char fenab;
48         int err;
49
50         flush_user_windows();
51         if (get_thread_wsaved()                                 ||
52             (((unsigned long)ucp) & (sizeof(unsigned long)-1))  ||
53             (!__access_ok(ucp, sizeof(*ucp))))
54                 goto do_sigsegv;
55         grp  = &ucp->uc_mcontext.mc_gregs;
56         err  = __get_user(pc, &((*grp)[MC_PC]));
57         err |= __get_user(npc, &((*grp)[MC_NPC]));
58         if (err || ((pc | npc) & 3))
59                 goto do_sigsegv;
60         if (regs->u_regs[UREG_I1]) {
61                 sigset_t set;
62
63                 if (_NSIG_WORDS == 1) {
64                         if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
65                                 goto do_sigsegv;
66                 } else {
67                         if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
68                                 goto do_sigsegv;
69                 }
70                 sigdelsetmask(&set, ~_BLOCKABLE);
71                 spin_lock_irq(&current->sighand->siglock);
72                 current->blocked = set;
73                 recalc_sigpending();
74                 spin_unlock_irq(&current->sighand->siglock);
75         }
76         if (test_thread_flag(TIF_32BIT)) {
77                 pc &= 0xffffffff;
78                 npc &= 0xffffffff;
79         }
80         regs->tpc = pc;
81         regs->tnpc = npc;
82         err |= __get_user(regs->y, &((*grp)[MC_Y]));
83         err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
84         regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
85         regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
86         err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
87         err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
88         err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
89         err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
90         err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
91         err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
92         err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
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_fpu_t         fpu_state;
237 };
238
239 /* Align macros */
240 #define RT_ALIGNEDSZ  (((sizeof(struct rt_signal_frame) + 7) & (~7)))
241
242 static long _sigpause_common(old_sigset_t set)
243 {
244         set &= _BLOCKABLE;
245         spin_lock_irq(&current->sighand->siglock);
246         current->saved_sigmask = current->blocked;
247         siginitset(&current->blocked, set);
248         recalc_sigpending();
249         spin_unlock_irq(&current->sighand->siglock);
250
251         current->state = TASK_INTERRUPTIBLE;
252         schedule();
253         set_thread_flag(TIF_RESTORE_SIGMASK);
254         return -ERESTARTNOHAND;
255 }
256
257 asmlinkage long sys_sigpause(unsigned int set)
258 {
259         return _sigpause_common(set);
260 }
261
262 asmlinkage long sys_sigsuspend(old_sigset_t set)
263 {
264         return _sigpause_common(set);
265 }
266
267 static inline int
268 restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
269 {
270         unsigned long *fpregs = current_thread_info()->fpregs;
271         unsigned long fprs;
272         int err;
273
274         err = __get_user(fprs, &fpu->si_fprs);
275         fprs_write(0);
276         regs->tstate &= ~TSTATE_PEF;
277         if (fprs & FPRS_DL)
278                 err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
279                                (sizeof(unsigned int) * 32));
280         if (fprs & FPRS_DU)
281                 err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
282                                (sizeof(unsigned int) * 32));
283         err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
284         err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
285         current_thread_info()->fpsaved[0] |= fprs;
286         return err;
287 }
288
289 void do_rt_sigreturn(struct pt_regs *regs)
290 {
291         struct rt_signal_frame __user *sf;
292         unsigned long tpc, tnpc, tstate;
293         __siginfo_fpu_t __user *fpu_save;
294         mm_segment_t old_fs;
295         sigset_t set;
296         stack_t st;
297         int err;
298
299         /* Always make any pending restarted system calls return -EINTR */
300         current_thread_info()->restart_block.fn = do_no_restart_syscall;
301
302         synchronize_user_stack ();
303         sf = (struct rt_signal_frame __user *)
304                 (regs->u_regs [UREG_FP] + STACK_BIAS);
305
306         /* 1. Make sure we are not getting garbage from the user */
307         if (((unsigned long) sf) & 3)
308                 goto segv;
309
310         err = get_user(tpc, &sf->regs.tpc);
311         err |= __get_user(tnpc, &sf->regs.tnpc);
312         if (test_thread_flag(TIF_32BIT)) {
313                 tpc &= 0xffffffff;
314                 tnpc &= 0xffffffff;
315         }
316         err |= ((tpc | tnpc) & 3);
317
318         /* 2. Restore the state */
319         err |= __get_user(regs->y, &sf->regs.y);
320         err |= __get_user(tstate, &sf->regs.tstate);
321         err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
322
323         /* User can only change condition codes and %asi in %tstate. */
324         regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
325         regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
326
327         err |= __get_user(fpu_save, &sf->fpu_save);
328         if (fpu_save)
329                 err |= restore_fpu_state(regs, &sf->fpu_state);
330
331         err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
332         err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
333         
334         if (err)
335                 goto segv;
336                 
337         regs->tpc = tpc;
338         regs->tnpc = tnpc;
339         
340         /* It is more difficult to avoid calling this function than to
341            call it and ignore errors.  */
342         old_fs = get_fs();
343         set_fs(KERNEL_DS);
344         do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
345         set_fs(old_fs);
346
347         sigdelsetmask(&set, ~_BLOCKABLE);
348         spin_lock_irq(&current->sighand->siglock);
349         current->blocked = set;
350         recalc_sigpending();
351         spin_unlock_irq(&current->sighand->siglock);
352         return;
353 segv:
354         force_sig(SIGSEGV, current);
355 }
356
357 /* Checks if the fp is valid */
358 static int invalid_frame_pointer(void __user *fp, int fplen)
359 {
360         if (((unsigned long) fp) & 7)
361                 return 1;
362         return 0;
363 }
364
365 static inline int
366 save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
367 {
368         unsigned long *fpregs = (unsigned long *)(regs+1);
369         unsigned long fprs;
370         int err = 0;
371         
372         fprs = current_thread_info()->fpsaved[0];
373         if (fprs & FPRS_DL)
374                 err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
375                                     (sizeof(unsigned int) * 32));
376         if (fprs & FPRS_DU)
377                 err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
378                                     (sizeof(unsigned int) * 32));
379         err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
380         err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
381         err |= __put_user(fprs, &fpu->si_fprs);
382
383         return err;
384 }
385
386 static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
387 {
388         unsigned long sp;
389
390         sp = regs->u_regs[UREG_FP] + STACK_BIAS;
391
392         /* This is the X/Open sanctioned signal stack switching.  */
393         if (ka->sa.sa_flags & SA_ONSTACK) {
394                 if (!on_sig_stack(sp) &&
395                     !((current->sas_ss_sp + current->sas_ss_size) & 7))
396                         sp = current->sas_ss_sp + current->sas_ss_size;
397         }
398         return (void __user *)(sp - framesize);
399 }
400
401 static inline void
402 setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
403                int signo, sigset_t *oldset, siginfo_t *info)
404 {
405         struct rt_signal_frame __user *sf;
406         int sigframe_size, err;
407
408         /* 1. Make sure everything is clean */
409         synchronize_user_stack();
410         save_and_clear_fpu();
411         
412         sigframe_size = RT_ALIGNEDSZ;
413         if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
414                 sigframe_size -= sizeof(__siginfo_fpu_t);
415
416         sf = (struct rt_signal_frame __user *)
417                 get_sigframe(ka, regs, sigframe_size);
418         
419         if (invalid_frame_pointer (sf, sigframe_size))
420                 goto sigill;
421
422         if (get_thread_wsaved() != 0)
423                 goto sigill;
424
425         /* 2. Save the current process state */
426         err = copy_to_user(&sf->regs, regs, sizeof (*regs));
427
428         if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
429                 err |= save_fpu_state(regs, &sf->fpu_state);
430                 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
431         } else {
432                 err |= __put_user(0, &sf->fpu_save);
433         }
434         
435         /* Setup sigaltstack */
436         err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
437         err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
438         err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
439
440         err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
441
442         err |= copy_in_user((u64 __user *)sf,
443                             (u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS),
444                             sizeof(struct reg_window));
445
446         if (info)
447                 err |= copy_siginfo_to_user(&sf->info, info);
448         else {
449                 err |= __put_user(signo, &sf->info.si_signo);
450                 err |= __put_user(SI_NOINFO, &sf->info.si_code);
451         }
452         if (err)
453                 goto sigsegv;
454         
455         /* 3. signal handler back-trampoline and parameters */
456         regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
457         regs->u_regs[UREG_I0] = signo;
458         regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
459
460         /* The sigcontext is passed in this way because of how it
461          * is defined in GLIBC's /usr/include/bits/sigcontext.h
462          * for sparc64.  It includes the 128 bytes of siginfo_t.
463          */
464         regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
465
466         /* 5. signal handler */
467         regs->tpc = (unsigned long) ka->sa.sa_handler;
468         regs->tnpc = (regs->tpc + 4);
469         if (test_thread_flag(TIF_32BIT)) {
470                 regs->tpc &= 0xffffffff;
471                 regs->tnpc &= 0xffffffff;
472         }
473         /* 4. return to kernel instructions */
474         regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
475         return;
476
477 sigill:
478         do_exit(SIGILL);
479 sigsegv:
480         force_sigsegv(signo, current);
481 }
482
483 static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
484                                  siginfo_t *info,
485                                  sigset_t *oldset, struct pt_regs *regs)
486 {
487         setup_rt_frame(ka, regs, signr, oldset,
488                        (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
489         spin_lock_irq(&current->sighand->siglock);
490         sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
491         if (!(ka->sa.sa_flags & SA_NOMASK))
492                 sigaddset(&current->blocked,signr);
493         recalc_sigpending();
494         spin_unlock_irq(&current->sighand->siglock);
495 }
496
497 static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
498                                      struct sigaction *sa)
499 {
500         switch (regs->u_regs[UREG_I0]) {
501         case ERESTART_RESTARTBLOCK:
502         case ERESTARTNOHAND:
503         no_system_call_restart:
504                 regs->u_regs[UREG_I0] = EINTR;
505                 regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
506                 break;
507         case ERESTARTSYS:
508                 if (!(sa->sa_flags & SA_RESTART))
509                         goto no_system_call_restart;
510                 /* fallthrough */
511         case ERESTARTNOINTR:
512                 regs->u_regs[UREG_I0] = orig_i0;
513                 regs->tpc -= 4;
514                 regs->tnpc -= 4;
515         }
516 }
517
518 /* Note that 'init' is a special process: it doesn't get signals it doesn't
519  * want to handle. Thus you cannot kill init even with a SIGKILL even by
520  * mistake.
521  */
522 static void do_signal(struct pt_regs *regs, unsigned long orig_i0, int restart_syscall)
523 {
524         siginfo_t info;
525         struct signal_deliver_cookie cookie;
526         struct k_sigaction ka;
527         int signr;
528         sigset_t *oldset;
529         
530         cookie.restart_syscall = restart_syscall;
531         cookie.orig_i0 = orig_i0;
532
533         if (test_thread_flag(TIF_RESTORE_SIGMASK))
534                 oldset = &current->saved_sigmask;
535         else
536                 oldset = &current->blocked;
537
538 #ifdef CONFIG_SPARC32_COMPAT
539         if (test_thread_flag(TIF_32BIT)) {
540                 extern void do_signal32(sigset_t *, struct pt_regs *,
541                                         unsigned long, int);
542                 do_signal32(oldset, regs, orig_i0,
543                             cookie.restart_syscall);
544                 return;
545         }
546 #endif  
547
548         signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
549         if (signr > 0) {
550                 if (cookie.restart_syscall)
551                         syscall_restart(orig_i0, regs, &ka.sa);
552                 handle_signal(signr, &ka, &info, oldset, regs);
553
554                 /* a signal was successfully delivered; the saved
555                  * sigmask will have been stored in the signal frame,
556                  * and will be restored by sigreturn, so we can simply
557                  * clear the TIF_RESTORE_SIGMASK flag.
558                  */
559                 if (test_thread_flag(TIF_RESTORE_SIGMASK))
560                         clear_thread_flag(TIF_RESTORE_SIGMASK);
561                 return;
562         }
563         if (cookie.restart_syscall &&
564             (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
565              regs->u_regs[UREG_I0] == ERESTARTSYS ||
566              regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
567                 /* replay the system call when we are done */
568                 regs->u_regs[UREG_I0] = cookie.orig_i0;
569                 regs->tpc -= 4;
570                 regs->tnpc -= 4;
571         }
572         if (cookie.restart_syscall &&
573             regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
574                 regs->u_regs[UREG_G1] = __NR_restart_syscall;
575                 regs->tpc -= 4;
576                 regs->tnpc -= 4;
577         }
578
579         /* if there's no signal to deliver, we just put the saved sigmask
580          * back
581          */
582         if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
583                 clear_thread_flag(TIF_RESTORE_SIGMASK);
584                 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
585         }
586 }
587
588 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, int restart_syscall,
589                       unsigned long thread_info_flags)
590 {
591         if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
592                 do_signal(regs, orig_i0, restart_syscall);
593 }
594
595 void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
596 {
597         struct signal_deliver_cookie *cp = cookie;
598
599         if (cp->restart_syscall &&
600             (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
601              regs->u_regs[UREG_I0] == ERESTARTSYS ||
602              regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
603                 /* replay the system call when we are done */
604                 regs->u_regs[UREG_I0] = cp->orig_i0;
605                 regs->tpc -= 4;
606                 regs->tnpc -= 4;
607                 cp->restart_syscall = 0;
608         }
609         if (cp->restart_syscall &&
610             regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
611                 regs->u_regs[UREG_G1] = __NR_restart_syscall;
612                 regs->tpc -= 4;
613                 regs->tnpc -= 4;
614                 cp->restart_syscall = 0;
615         }
616 }