Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / arch / sparc64 / kernel / ptrace.c
1 /* ptrace.c: Sparc process tracing support.
2  *
3  * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
4  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5  *
6  * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
7  * and David Mosberger.
8  *
9  * Added Linux support -miguel (weird, eh?, the original code was meant
10  * to emulate SunOS).
11  */
12
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/mm.h>
16 #include <linux/errno.h>
17 #include <linux/ptrace.h>
18 #include <linux/user.h>
19 #include <linux/smp.h>
20 #include <linux/smp_lock.h>
21 #include <linux/security.h>
22 #include <linux/seccomp.h>
23 #include <linux/audit.h>
24 #include <linux/signal.h>
25
26 #include <asm/asi.h>
27 #include <asm/pgtable.h>
28 #include <asm/system.h>
29 #include <asm/uaccess.h>
30 #include <asm/psrcompat.h>
31 #include <asm/visasm.h>
32 #include <asm/spitfire.h>
33 #include <asm/page.h>
34 #include <asm/cpudata.h>
35
36 /* Returning from ptrace is a bit tricky because the syscall return
37  * low level code assumes any value returned which is negative and
38  * is a valid errno will mean setting the condition codes to indicate
39  * an error return.  This doesn't work, so we have this hook.
40  */
41 static inline void pt_error_return(struct pt_regs *regs, unsigned long error)
42 {
43         regs->u_regs[UREG_I0] = error;
44         regs->tstate |= (TSTATE_ICARRY | TSTATE_XCARRY);
45         regs->tpc = regs->tnpc;
46         regs->tnpc += 4;
47 }
48
49 static inline void pt_succ_return(struct pt_regs *regs, unsigned long value)
50 {
51         regs->u_regs[UREG_I0] = value;
52         regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY);
53         regs->tpc = regs->tnpc;
54         regs->tnpc += 4;
55 }
56
57 static inline void
58 pt_succ_return_linux(struct pt_regs *regs, unsigned long value, void __user *addr)
59 {
60         if (test_thread_flag(TIF_32BIT)) {
61                 if (put_user(value, (unsigned int __user *) addr)) {
62                         pt_error_return(regs, EFAULT);
63                         return;
64                 }
65         } else {
66                 if (put_user(value, (long __user *) addr)) {
67                         pt_error_return(regs, EFAULT);
68                         return;
69                 }
70         }
71         regs->u_regs[UREG_I0] = 0;
72         regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY);
73         regs->tpc = regs->tnpc;
74         regs->tnpc += 4;
75 }
76
77 static void
78 pt_os_succ_return (struct pt_regs *regs, unsigned long val, void __user *addr)
79 {
80         if (current->personality == PER_SUNOS)
81                 pt_succ_return (regs, val);
82         else
83                 pt_succ_return_linux (regs, val, addr);
84 }
85
86 /* #define ALLOW_INIT_TRACING */
87 /* #define DEBUG_PTRACE */
88
89 #ifdef DEBUG_PTRACE
90 char *pt_rq [] = {
91         /* 0  */ "TRACEME", "PEEKTEXT", "PEEKDATA", "PEEKUSR",
92         /* 4  */ "POKETEXT", "POKEDATA", "POKEUSR", "CONT",
93         /* 8  */ "KILL", "SINGLESTEP", "SUNATTACH", "SUNDETACH",
94         /* 12 */ "GETREGS", "SETREGS", "GETFPREGS", "SETFPREGS",
95         /* 16 */ "READDATA", "WRITEDATA", "READTEXT", "WRITETEXT",
96         /* 20 */ "GETFPAREGS", "SETFPAREGS", "unknown", "unknown",
97         /* 24 */ "SYSCALL", ""
98 };
99 #endif
100
101 /*
102  * Called by kernel/ptrace.c when detaching..
103  *
104  * Make sure single step bits etc are not set.
105  */
106 void ptrace_disable(struct task_struct *child)
107 {
108         /* nothing to do */
109 }
110
111 /* To get the necessary page struct, access_process_vm() first calls
112  * get_user_pages().  This has done a flush_dcache_page() on the
113  * accessed page.  Then our caller (copy_{to,from}_user_page()) did
114  * to memcpy to read/write the data from that page.
115  *
116  * Now, the only thing we have to do is:
117  * 1) flush the D-cache if it's possible than an illegal alias
118  *    has been created
119  * 2) flush the I-cache if this is pre-cheetah and we did a write
120  */
121 void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
122                          unsigned long uaddr, void *kaddr,
123                          unsigned long len, int write)
124 {
125         BUG_ON(len > PAGE_SIZE);
126
127         if (tlb_type == hypervisor)
128                 return;
129
130 #ifdef DCACHE_ALIASING_POSSIBLE
131         /* If bit 13 of the kernel address we used to access the
132          * user page is the same as the virtual address that page
133          * is mapped to in the user's address space, we can skip the
134          * D-cache flush.
135          */
136         if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
137                 unsigned long start = __pa(kaddr);
138                 unsigned long end = start + len;
139                 unsigned long dcache_line_size;
140
141                 dcache_line_size = local_cpu_data().dcache_line_size;
142
143                 if (tlb_type == spitfire) {
144                         for (; start < end; start += dcache_line_size)
145                                 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
146                 } else {
147                         start &= ~(dcache_line_size - 1);
148                         for (; start < end; start += dcache_line_size)
149                                 __asm__ __volatile__(
150                                         "stxa %%g0, [%0] %1\n\t"
151                                         "membar #Sync"
152                                         : /* no outputs */
153                                         : "r" (start),
154                                         "i" (ASI_DCACHE_INVALIDATE));
155                 }
156         }
157 #endif
158         if (write && tlb_type == spitfire) {
159                 unsigned long start = (unsigned long) kaddr;
160                 unsigned long end = start + len;
161                 unsigned long icache_line_size;
162
163                 icache_line_size = local_cpu_data().icache_line_size;
164
165                 for (; start < end; start += icache_line_size)
166                         flushi(start);
167         }
168 }
169
170 asmlinkage void do_ptrace(struct pt_regs *regs)
171 {
172         int request = regs->u_regs[UREG_I0];
173         pid_t pid = regs->u_regs[UREG_I1];
174         unsigned long addr = regs->u_regs[UREG_I2];
175         unsigned long data = regs->u_regs[UREG_I3];
176         unsigned long addr2 = regs->u_regs[UREG_I4];
177         struct task_struct *child;
178         int ret;
179
180         if (test_thread_flag(TIF_32BIT)) {
181                 addr &= 0xffffffffUL;
182                 data &= 0xffffffffUL;
183                 addr2 &= 0xffffffffUL;
184         }
185         lock_kernel();
186 #ifdef DEBUG_PTRACE
187         {
188                 char *s;
189
190                 if ((request >= 0) && (request <= 24))
191                         s = pt_rq [request];
192                 else
193                         s = "unknown";
194
195                 if (request == PTRACE_POKEDATA && data == 0x91d02001){
196                         printk ("do_ptrace: breakpoint pid=%d, addr=%016lx addr2=%016lx\n",
197                                 pid, addr, addr2);
198                 } else 
199                         printk("do_ptrace: rq=%s(%d) pid=%d addr=%016lx data=%016lx addr2=%016lx\n",
200                                s, request, pid, addr, data, addr2);
201         }
202 #endif
203         if (request == PTRACE_TRACEME) {
204                 ret = ptrace_traceme();
205                 pt_succ_return(regs, 0);
206                 goto out;
207         }
208
209         child = ptrace_get_task_struct(pid);
210         if (IS_ERR(child)) {
211                 ret = PTR_ERR(child);
212                 pt_error_return(regs, -ret);
213                 goto out;
214         }
215
216         if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
217             || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
218                 if (ptrace_attach(child)) {
219                         pt_error_return(regs, EPERM);
220                         goto out_tsk;
221                 }
222                 pt_succ_return(regs, 0);
223                 goto out_tsk;
224         }
225
226         ret = ptrace_check_attach(child, request == PTRACE_KILL);
227         if (ret < 0) {
228                 pt_error_return(regs, -ret);
229                 goto out_tsk;
230         }
231
232         if (!(test_thread_flag(TIF_32BIT))      &&
233             ((request == PTRACE_READDATA64)             ||
234              (request == PTRACE_WRITEDATA64)            ||
235              (request == PTRACE_READTEXT64)             ||
236              (request == PTRACE_WRITETEXT64)            ||
237              (request == PTRACE_PEEKTEXT64)             ||
238              (request == PTRACE_POKETEXT64)             ||
239              (request == PTRACE_PEEKDATA64)             ||
240              (request == PTRACE_POKEDATA64))) {
241                 addr = regs->u_regs[UREG_G2];
242                 addr2 = regs->u_regs[UREG_G3];
243                 request -= 30; /* wheee... */
244         }
245
246         switch(request) {
247         case PTRACE_PEEKTEXT: /* read word at location addr. */ 
248         case PTRACE_PEEKDATA: {
249                 unsigned long tmp64;
250                 unsigned int tmp32;
251                 int res, copied;
252
253                 res = -EIO;
254                 if (test_thread_flag(TIF_32BIT)) {
255                         copied = access_process_vm(child, addr,
256                                                    &tmp32, sizeof(tmp32), 0);
257                         tmp64 = (unsigned long) tmp32;
258                         if (copied == sizeof(tmp32))
259                                 res = 0;
260                 } else {
261                         copied = access_process_vm(child, addr,
262                                                    &tmp64, sizeof(tmp64), 0);
263                         if (copied == sizeof(tmp64))
264                                 res = 0;
265                 }
266                 if (res < 0)
267                         pt_error_return(regs, -res);
268                 else
269                         pt_os_succ_return(regs, tmp64, (void __user *) data);
270                 goto out_tsk;
271         }
272
273         case PTRACE_POKETEXT: /* write the word at location addr. */
274         case PTRACE_POKEDATA: {
275                 unsigned long tmp64;
276                 unsigned int tmp32;
277                 int copied, res = -EIO;
278
279                 if (test_thread_flag(TIF_32BIT)) {
280                         tmp32 = data;
281                         copied = access_process_vm(child, addr,
282                                                    &tmp32, sizeof(tmp32), 1);
283                         if (copied == sizeof(tmp32))
284                                 res = 0;
285                 } else {
286                         tmp64 = data;
287                         copied = access_process_vm(child, addr,
288                                                    &tmp64, sizeof(tmp64), 1);
289                         if (copied == sizeof(tmp64))
290                                 res = 0;
291                 }
292                 if (res < 0)
293                         pt_error_return(regs, -res);
294                 else
295                         pt_succ_return(regs, res);
296                 goto out_tsk;
297         }
298
299         case PTRACE_GETREGS: {
300                 struct pt_regs32 __user *pregs =
301                         (struct pt_regs32 __user *) addr;
302                 struct pt_regs *cregs = task_pt_regs(child);
303                 int rval;
304
305                 if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
306                     __put_user(cregs->tpc, (&pregs->pc)) ||
307                     __put_user(cregs->tnpc, (&pregs->npc)) ||
308                     __put_user(cregs->y, (&pregs->y))) {
309                         pt_error_return(regs, EFAULT);
310                         goto out_tsk;
311                 }
312                 for (rval = 1; rval < 16; rval++)
313                         if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
314                                 pt_error_return(regs, EFAULT);
315                                 goto out_tsk;
316                         }
317                 pt_succ_return(regs, 0);
318 #ifdef DEBUG_PTRACE
319                 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
320 #endif
321                 goto out_tsk;
322         }
323
324         case PTRACE_GETREGS64: {
325                 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
326                 struct pt_regs *cregs = task_pt_regs(child);
327                 unsigned long tpc = cregs->tpc;
328                 int rval;
329
330                 if ((task_thread_info(child)->flags & _TIF_32BIT) != 0)
331                         tpc &= 0xffffffff;
332                 if (__put_user(cregs->tstate, (&pregs->tstate)) ||
333                     __put_user(tpc, (&pregs->tpc)) ||
334                     __put_user(cregs->tnpc, (&pregs->tnpc)) ||
335                     __put_user(cregs->y, (&pregs->y))) {
336                         pt_error_return(regs, EFAULT);
337                         goto out_tsk;
338                 }
339                 for (rval = 1; rval < 16; rval++)
340                         if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
341                                 pt_error_return(regs, EFAULT);
342                                 goto out_tsk;
343                         }
344                 pt_succ_return(regs, 0);
345 #ifdef DEBUG_PTRACE
346                 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
347 #endif
348                 goto out_tsk;
349         }
350
351         case PTRACE_SETREGS: {
352                 struct pt_regs32 __user *pregs =
353                         (struct pt_regs32 __user *) addr;
354                 struct pt_regs *cregs = task_pt_regs(child);
355                 unsigned int psr, pc, npc, y;
356                 int i;
357
358                 /* Must be careful, tracing process can only set certain
359                  * bits in the psr.
360                  */
361                 if (__get_user(psr, (&pregs->psr)) ||
362                     __get_user(pc, (&pregs->pc)) ||
363                     __get_user(npc, (&pregs->npc)) ||
364                     __get_user(y, (&pregs->y))) {
365                         pt_error_return(regs, EFAULT);
366                         goto out_tsk;
367                 }
368                 cregs->tstate &= ~(TSTATE_ICC);
369                 cregs->tstate |= psr_to_tstate_icc(psr);
370                 if (!((pc | npc) & 3)) {
371                         cregs->tpc = pc;
372                         cregs->tnpc = npc;
373                 }
374                 cregs->y = y;
375                 for (i = 1; i < 16; i++) {
376                         if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
377                                 pt_error_return(regs, EFAULT);
378                                 goto out_tsk;
379                         }
380                 }
381                 pt_succ_return(regs, 0);
382                 goto out_tsk;
383         }
384
385         case PTRACE_SETREGS64: {
386                 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
387                 struct pt_regs *cregs = task_pt_regs(child);
388                 unsigned long tstate, tpc, tnpc, y;
389                 int i;
390
391                 /* Must be careful, tracing process can only set certain
392                  * bits in the psr.
393                  */
394                 if (__get_user(tstate, (&pregs->tstate)) ||
395                     __get_user(tpc, (&pregs->tpc)) ||
396                     __get_user(tnpc, (&pregs->tnpc)) ||
397                     __get_user(y, (&pregs->y))) {
398                         pt_error_return(regs, EFAULT);
399                         goto out_tsk;
400                 }
401                 if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) {
402                         tpc &= 0xffffffff;
403                         tnpc &= 0xffffffff;
404                 }
405                 tstate &= (TSTATE_ICC | TSTATE_XCC);
406                 cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
407                 cregs->tstate |= tstate;
408                 if (!((tpc | tnpc) & 3)) {
409                         cregs->tpc = tpc;
410                         cregs->tnpc = tnpc;
411                 }
412                 cregs->y = y;
413                 for (i = 1; i < 16; i++) {
414                         if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
415                                 pt_error_return(regs, EFAULT);
416                                 goto out_tsk;
417                         }
418                 }
419                 pt_succ_return(regs, 0);
420                 goto out_tsk;
421         }
422
423         case PTRACE_GETFPREGS: {
424                 struct fps {
425                         unsigned int regs[32];
426                         unsigned int fsr;
427                         unsigned int flags;
428                         unsigned int extra;
429                         unsigned int fpqd;
430                         struct fq {
431                                 unsigned int insnaddr;
432                                 unsigned int insn;
433                         } fpq[16];
434                 };
435                 struct fps __user *fps = (struct fps __user *) addr;
436                 unsigned long *fpregs = task_thread_info(child)->fpregs;
437
438                 if (copy_to_user(&fps->regs[0], fpregs,
439                                  (32 * sizeof(unsigned int))) ||
440                     __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) ||
441                     __put_user(0, (&fps->fpqd)) ||
442                     __put_user(0, (&fps->flags)) ||
443                     __put_user(0, (&fps->extra)) ||
444                     clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) {
445                         pt_error_return(regs, EFAULT);
446                         goto out_tsk;
447                 }
448                 pt_succ_return(regs, 0);
449                 goto out_tsk;
450         }
451
452         case PTRACE_GETFPREGS64: {
453                 struct fps {
454                         unsigned int regs[64];
455                         unsigned long fsr;
456                 };
457                 struct fps __user *fps = (struct fps __user *) addr;
458                 unsigned long *fpregs = task_thread_info(child)->fpregs;
459
460                 if (copy_to_user(&fps->regs[0], fpregs,
461                                  (64 * sizeof(unsigned int))) ||
462                     __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
463                         pt_error_return(regs, EFAULT);
464                         goto out_tsk;
465                 }
466                 pt_succ_return(regs, 0);
467                 goto out_tsk;
468         }
469
470         case PTRACE_SETFPREGS: {
471                 struct fps {
472                         unsigned int regs[32];
473                         unsigned int fsr;
474                         unsigned int flags;
475                         unsigned int extra;
476                         unsigned int fpqd;
477                         struct fq {
478                                 unsigned int insnaddr;
479                                 unsigned int insn;
480                         } fpq[16];
481                 };
482                 struct fps __user *fps = (struct fps __user *) addr;
483                 unsigned long *fpregs = task_thread_info(child)->fpregs;
484                 unsigned fsr;
485
486                 if (copy_from_user(fpregs, &fps->regs[0],
487                                    (32 * sizeof(unsigned int))) ||
488                     __get_user(fsr, (&fps->fsr))) {
489                         pt_error_return(regs, EFAULT);
490                         goto out_tsk;
491                 }
492                 task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL;
493                 task_thread_info(child)->xfsr[0] |= fsr;
494                 if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
495                         task_thread_info(child)->gsr[0] = 0;
496                 task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
497                 pt_succ_return(regs, 0);
498                 goto out_tsk;
499         }
500
501         case PTRACE_SETFPREGS64: {
502                 struct fps {
503                         unsigned int regs[64];
504                         unsigned long fsr;
505                 };
506                 struct fps __user *fps = (struct fps __user *) addr;
507                 unsigned long *fpregs = task_thread_info(child)->fpregs;
508
509                 if (copy_from_user(fpregs, &fps->regs[0],
510                                    (64 * sizeof(unsigned int))) ||
511                     __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
512                         pt_error_return(regs, EFAULT);
513                         goto out_tsk;
514                 }
515                 if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
516                         task_thread_info(child)->gsr[0] = 0;
517                 task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
518                 pt_succ_return(regs, 0);
519                 goto out_tsk;
520         }
521
522         case PTRACE_READTEXT:
523         case PTRACE_READDATA: {
524                 int res = ptrace_readdata(child, addr,
525                                           (char __user *)addr2, data);
526                 if (res == data) {
527                         pt_succ_return(regs, 0);
528                         goto out_tsk;
529                 }
530                 if (res >= 0)
531                         res = -EIO;
532                 pt_error_return(regs, -res);
533                 goto out_tsk;
534         }
535
536         case PTRACE_WRITETEXT:
537         case PTRACE_WRITEDATA: {
538                 int res = ptrace_writedata(child, (char __user *) addr2,
539                                            addr, data);
540                 if (res == data) {
541                         pt_succ_return(regs, 0);
542                         goto out_tsk;
543                 }
544                 if (res >= 0)
545                         res = -EIO;
546                 pt_error_return(regs, -res);
547                 goto out_tsk;
548         }
549         case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
550                 addr = 1;
551
552         case PTRACE_CONT: { /* restart after signal. */
553                 if (!valid_signal(data)) {
554                         pt_error_return(regs, EIO);
555                         goto out_tsk;
556                 }
557
558                 if (request == PTRACE_SYSCALL) {
559                         set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
560                 } else {
561                         clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
562                 }
563
564                 child->exit_code = data;
565 #ifdef DEBUG_PTRACE
566                 printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
567                         child->pid, child->exit_code,
568                         task_pt_regs(child)->tpc,
569                         task_pt_regs(child)->tnpc);
570                        
571 #endif
572                 wake_up_process(child);
573                 pt_succ_return(regs, 0);
574                 goto out_tsk;
575         }
576
577 /*
578  * make the child exit.  Best I can do is send it a sigkill. 
579  * perhaps it should be put in the status that it wants to 
580  * exit.
581  */
582         case PTRACE_KILL: {
583                 if (child->exit_state == EXIT_ZOMBIE) { /* already dead */
584                         pt_succ_return(regs, 0);
585                         goto out_tsk;
586                 }
587                 child->exit_code = SIGKILL;
588                 wake_up_process(child);
589                 pt_succ_return(regs, 0);
590                 goto out_tsk;
591         }
592
593         case PTRACE_SUNDETACH: { /* detach a process that was attached. */
594                 int error = ptrace_detach(child, data);
595                 if (error) {
596                         pt_error_return(regs, EIO);
597                         goto out_tsk;
598                 }
599                 pt_succ_return(regs, 0);
600                 goto out_tsk;
601         }
602
603         /* PTRACE_DUMPCORE unsupported... */
604
605         default: {
606                 int err = ptrace_request(child, request, addr, data);
607                 if (err)
608                         pt_error_return(regs, -err);
609                 else
610                         pt_succ_return(regs, 0);
611                 goto out_tsk;
612         }
613         }
614 out_tsk:
615         if (child)
616                 put_task_struct(child);
617 out:
618         unlock_kernel();
619 }
620
621 asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
622 {
623         /* do the secure computing check first */
624         secure_computing(regs->u_regs[UREG_G1]);
625
626         if (unlikely(current->audit_context) && syscall_exit_p) {
627                 unsigned long tstate = regs->tstate;
628                 int result = AUDITSC_SUCCESS;
629
630                 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
631                         result = AUDITSC_FAILURE;
632
633                 audit_syscall_exit(current, result, regs->u_regs[UREG_I0]);
634         }
635
636         if (!(current->ptrace & PT_PTRACED))
637                 goto out;
638
639         if (!test_thread_flag(TIF_SYSCALL_TRACE))
640                 goto out;
641
642         ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
643                                  ? 0x80 : 0));
644
645         /*
646          * this isn't the same as continuing with a signal, but it will do
647          * for normal use.  strace only continues with a signal if the
648          * stopping signal is not SIGTRAP.  -brl
649          */
650         if (current->exit_code) {
651                 send_sig(current->exit_code, current, 1);
652                 current->exit_code = 0;
653         }
654
655 out:
656         if (unlikely(current->audit_context) && !syscall_exit_p)
657                 audit_syscall_entry(current,
658                                     (test_thread_flag(TIF_32BIT) ?
659                                      AUDIT_ARCH_SPARC :
660                                      AUDIT_ARCH_SPARC64),
661                                     regs->u_regs[UREG_G1],
662                                     regs->u_regs[UREG_I0],
663                                     regs->u_regs[UREG_I1],
664                                     regs->u_regs[UREG_I2],
665                                     regs->u_regs[UREG_I3]);
666 }