774ecbb8a0319061c909c9ad72b39d32b11a2737
[linux-2.6.git] / 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 #ifdef DCACHE_ALIASING_POSSIBLE
128         /* If bit 13 of the kernel address we used to access the
129          * user page is the same as the virtual address that page
130          * is mapped to in the user's address space, we can skip the
131          * D-cache flush.
132          */
133         if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
134                 unsigned long start = __pa(kaddr);
135                 unsigned long end = start + len;
136                 unsigned long dcache_line_size;
137
138                 dcache_line_size = local_cpu_data().dcache_line_size;
139
140                 if (tlb_type == spitfire) {
141                         for (; start < end; start += dcache_line_size)
142                                 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
143                 } else {
144                         start &= ~(dcache_line_size - 1);
145                         for (; start < end; start += dcache_line_size)
146                                 __asm__ __volatile__(
147                                         "stxa %%g0, [%0] %1\n\t"
148                                         "membar #Sync"
149                                         : /* no outputs */
150                                         : "r" (start),
151                                         "i" (ASI_DCACHE_INVALIDATE));
152                 }
153         }
154 #endif
155         if (write && tlb_type == spitfire) {
156                 unsigned long start = (unsigned long) kaddr;
157                 unsigned long end = start + len;
158                 unsigned long icache_line_size;
159
160                 icache_line_size = local_cpu_data().icache_line_size;
161
162                 for (; start < end; start += icache_line_size)
163                         flushi(start);
164         }
165 }
166
167 asmlinkage void do_ptrace(struct pt_regs *regs)
168 {
169         int request = regs->u_regs[UREG_I0];
170         pid_t pid = regs->u_regs[UREG_I1];
171         unsigned long addr = regs->u_regs[UREG_I2];
172         unsigned long data = regs->u_regs[UREG_I3];
173         unsigned long addr2 = regs->u_regs[UREG_I4];
174         struct task_struct *child;
175         int ret;
176
177         if (test_thread_flag(TIF_32BIT)) {
178                 addr &= 0xffffffffUL;
179                 data &= 0xffffffffUL;
180                 addr2 &= 0xffffffffUL;
181         }
182         lock_kernel();
183 #ifdef DEBUG_PTRACE
184         {
185                 char *s;
186
187                 if ((request >= 0) && (request <= 24))
188                         s = pt_rq [request];
189                 else
190                         s = "unknown";
191
192                 if (request == PTRACE_POKEDATA && data == 0x91d02001){
193                         printk ("do_ptrace: breakpoint pid=%d, addr=%016lx addr2=%016lx\n",
194                                 pid, addr, addr2);
195                 } else 
196                         printk("do_ptrace: rq=%s(%d) pid=%d addr=%016lx data=%016lx addr2=%016lx\n",
197                                s, request, pid, addr, data, addr2);
198         }
199 #endif
200         if (request == PTRACE_TRACEME) {
201                 int ret;
202
203                 /* are we already being traced? */
204                 if (current->ptrace & PT_PTRACED) {
205                         pt_error_return(regs, EPERM);
206                         goto out;
207                 }
208                 ret = security_ptrace(current->parent, current);
209                 if (ret) {
210                         pt_error_return(regs, -ret);
211                         goto out;
212                 }
213
214                 /* set the ptrace bit in the process flags. */
215                 current->ptrace |= PT_PTRACED;
216                 pt_succ_return(regs, 0);
217                 goto out;
218         }
219 #ifndef ALLOW_INIT_TRACING
220         if (pid == 1) {
221                 /* Can't dork with init. */
222                 pt_error_return(regs, EPERM);
223                 goto out;
224         }
225 #endif
226         read_lock(&tasklist_lock);
227         child = find_task_by_pid(pid);
228         if (child)
229                 get_task_struct(child);
230         read_unlock(&tasklist_lock);
231
232         if (!child) {
233                 pt_error_return(regs, ESRCH);
234                 goto out;
235         }
236
237         if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
238             || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
239                 if (ptrace_attach(child)) {
240                         pt_error_return(regs, EPERM);
241                         goto out_tsk;
242                 }
243                 pt_succ_return(regs, 0);
244                 goto out_tsk;
245         }
246
247         ret = ptrace_check_attach(child, request == PTRACE_KILL);
248         if (ret < 0) {
249                 pt_error_return(regs, -ret);
250                 goto out_tsk;
251         }
252
253         if (!(test_thread_flag(TIF_32BIT))      &&
254             ((request == PTRACE_READDATA64)             ||
255              (request == PTRACE_WRITEDATA64)            ||
256              (request == PTRACE_READTEXT64)             ||
257              (request == PTRACE_WRITETEXT64)            ||
258              (request == PTRACE_PEEKTEXT64)             ||
259              (request == PTRACE_POKETEXT64)             ||
260              (request == PTRACE_PEEKDATA64)             ||
261              (request == PTRACE_POKEDATA64))) {
262                 addr = regs->u_regs[UREG_G2];
263                 addr2 = regs->u_regs[UREG_G3];
264                 request -= 30; /* wheee... */
265         }
266
267         switch(request) {
268         case PTRACE_PEEKTEXT: /* read word at location addr. */ 
269         case PTRACE_PEEKDATA: {
270                 unsigned long tmp64;
271                 unsigned int tmp32;
272                 int res, copied;
273
274                 res = -EIO;
275                 if (test_thread_flag(TIF_32BIT)) {
276                         copied = access_process_vm(child, addr,
277                                                    &tmp32, sizeof(tmp32), 0);
278                         tmp64 = (unsigned long) tmp32;
279                         if (copied == sizeof(tmp32))
280                                 res = 0;
281                 } else {
282                         copied = access_process_vm(child, addr,
283                                                    &tmp64, sizeof(tmp64), 0);
284                         if (copied == sizeof(tmp64))
285                                 res = 0;
286                 }
287                 if (res < 0)
288                         pt_error_return(regs, -res);
289                 else
290                         pt_os_succ_return(regs, tmp64, (void __user *) data);
291                 goto out_tsk;
292         }
293
294         case PTRACE_POKETEXT: /* write the word at location addr. */
295         case PTRACE_POKEDATA: {
296                 unsigned long tmp64;
297                 unsigned int tmp32;
298                 int copied, res = -EIO;
299
300                 if (test_thread_flag(TIF_32BIT)) {
301                         tmp32 = data;
302                         copied = access_process_vm(child, addr,
303                                                    &tmp32, sizeof(tmp32), 1);
304                         if (copied == sizeof(tmp32))
305                                 res = 0;
306                 } else {
307                         tmp64 = data;
308                         copied = access_process_vm(child, addr,
309                                                    &tmp64, sizeof(tmp64), 1);
310                         if (copied == sizeof(tmp64))
311                                 res = 0;
312                 }
313                 if (res < 0)
314                         pt_error_return(regs, -res);
315                 else
316                         pt_succ_return(regs, res);
317                 goto out_tsk;
318         }
319
320         case PTRACE_GETREGS: {
321                 struct pt_regs32 __user *pregs =
322                         (struct pt_regs32 __user *) addr;
323                 struct pt_regs *cregs = child->thread_info->kregs;
324                 int rval;
325
326                 if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
327                     __put_user(cregs->tpc, (&pregs->pc)) ||
328                     __put_user(cregs->tnpc, (&pregs->npc)) ||
329                     __put_user(cregs->y, (&pregs->y))) {
330                         pt_error_return(regs, EFAULT);
331                         goto out_tsk;
332                 }
333                 for (rval = 1; rval < 16; rval++)
334                         if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
335                                 pt_error_return(regs, EFAULT);
336                                 goto out_tsk;
337                         }
338                 pt_succ_return(regs, 0);
339 #ifdef DEBUG_PTRACE
340                 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
341 #endif
342                 goto out_tsk;
343         }
344
345         case PTRACE_GETREGS64: {
346                 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
347                 struct pt_regs *cregs = child->thread_info->kregs;
348                 unsigned long tpc = cregs->tpc;
349                 int rval;
350
351                 if ((child->thread_info->flags & _TIF_32BIT) != 0)
352                         tpc &= 0xffffffff;
353                 if (__put_user(cregs->tstate, (&pregs->tstate)) ||
354                     __put_user(tpc, (&pregs->tpc)) ||
355                     __put_user(cregs->tnpc, (&pregs->tnpc)) ||
356                     __put_user(cregs->y, (&pregs->y))) {
357                         pt_error_return(regs, EFAULT);
358                         goto out_tsk;
359                 }
360                 for (rval = 1; rval < 16; rval++)
361                         if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
362                                 pt_error_return(regs, EFAULT);
363                                 goto out_tsk;
364                         }
365                 pt_succ_return(regs, 0);
366 #ifdef DEBUG_PTRACE
367                 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
368 #endif
369                 goto out_tsk;
370         }
371
372         case PTRACE_SETREGS: {
373                 struct pt_regs32 __user *pregs =
374                         (struct pt_regs32 __user *) addr;
375                 struct pt_regs *cregs = child->thread_info->kregs;
376                 unsigned int psr, pc, npc, y;
377                 int i;
378
379                 /* Must be careful, tracing process can only set certain
380                  * bits in the psr.
381                  */
382                 if (__get_user(psr, (&pregs->psr)) ||
383                     __get_user(pc, (&pregs->pc)) ||
384                     __get_user(npc, (&pregs->npc)) ||
385                     __get_user(y, (&pregs->y))) {
386                         pt_error_return(regs, EFAULT);
387                         goto out_tsk;
388                 }
389                 cregs->tstate &= ~(TSTATE_ICC);
390                 cregs->tstate |= psr_to_tstate_icc(psr);
391                 if (!((pc | npc) & 3)) {
392                         cregs->tpc = pc;
393                         cregs->tnpc = npc;
394                 }
395                 cregs->y = y;
396                 for (i = 1; i < 16; i++) {
397                         if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
398                                 pt_error_return(regs, EFAULT);
399                                 goto out_tsk;
400                         }
401                 }
402                 pt_succ_return(regs, 0);
403                 goto out_tsk;
404         }
405
406         case PTRACE_SETREGS64: {
407                 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
408                 struct pt_regs *cregs = child->thread_info->kregs;
409                 unsigned long tstate, tpc, tnpc, y;
410                 int i;
411
412                 /* Must be careful, tracing process can only set certain
413                  * bits in the psr.
414                  */
415                 if (__get_user(tstate, (&pregs->tstate)) ||
416                     __get_user(tpc, (&pregs->tpc)) ||
417                     __get_user(tnpc, (&pregs->tnpc)) ||
418                     __get_user(y, (&pregs->y))) {
419                         pt_error_return(regs, EFAULT);
420                         goto out_tsk;
421                 }
422                 if ((child->thread_info->flags & _TIF_32BIT) != 0) {
423                         tpc &= 0xffffffff;
424                         tnpc &= 0xffffffff;
425                 }
426                 tstate &= (TSTATE_ICC | TSTATE_XCC);
427                 cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
428                 cregs->tstate |= tstate;
429                 if (!((tpc | tnpc) & 3)) {
430                         cregs->tpc = tpc;
431                         cregs->tnpc = tnpc;
432                 }
433                 cregs->y = y;
434                 for (i = 1; i < 16; i++) {
435                         if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
436                                 pt_error_return(regs, EFAULT);
437                                 goto out_tsk;
438                         }
439                 }
440                 pt_succ_return(regs, 0);
441                 goto out_tsk;
442         }
443
444         case PTRACE_GETFPREGS: {
445                 struct fps {
446                         unsigned int regs[32];
447                         unsigned int fsr;
448                         unsigned int flags;
449                         unsigned int extra;
450                         unsigned int fpqd;
451                         struct fq {
452                                 unsigned int insnaddr;
453                                 unsigned int insn;
454                         } fpq[16];
455                 };
456                 struct fps __user *fps = (struct fps __user *) addr;
457                 unsigned long *fpregs = child->thread_info->fpregs;
458
459                 if (copy_to_user(&fps->regs[0], fpregs,
460                                  (32 * sizeof(unsigned int))) ||
461                     __put_user(child->thread_info->xfsr[0], (&fps->fsr)) ||
462                     __put_user(0, (&fps->fpqd)) ||
463                     __put_user(0, (&fps->flags)) ||
464                     __put_user(0, (&fps->extra)) ||
465                     clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) {
466                         pt_error_return(regs, EFAULT);
467                         goto out_tsk;
468                 }
469                 pt_succ_return(regs, 0);
470                 goto out_tsk;
471         }
472
473         case PTRACE_GETFPREGS64: {
474                 struct fps {
475                         unsigned int regs[64];
476                         unsigned long fsr;
477                 };
478                 struct fps __user *fps = (struct fps __user *) addr;
479                 unsigned long *fpregs = child->thread_info->fpregs;
480
481                 if (copy_to_user(&fps->regs[0], fpregs,
482                                  (64 * sizeof(unsigned int))) ||
483                     __put_user(child->thread_info->xfsr[0], (&fps->fsr))) {
484                         pt_error_return(regs, EFAULT);
485                         goto out_tsk;
486                 }
487                 pt_succ_return(regs, 0);
488                 goto out_tsk;
489         }
490
491         case PTRACE_SETFPREGS: {
492                 struct fps {
493                         unsigned int regs[32];
494                         unsigned int fsr;
495                         unsigned int flags;
496                         unsigned int extra;
497                         unsigned int fpqd;
498                         struct fq {
499                                 unsigned int insnaddr;
500                                 unsigned int insn;
501                         } fpq[16];
502                 };
503                 struct fps __user *fps = (struct fps __user *) addr;
504                 unsigned long *fpregs = child->thread_info->fpregs;
505                 unsigned fsr;
506
507                 if (copy_from_user(fpregs, &fps->regs[0],
508                                    (32 * sizeof(unsigned int))) ||
509                     __get_user(fsr, (&fps->fsr))) {
510                         pt_error_return(regs, EFAULT);
511                         goto out_tsk;
512                 }
513                 child->thread_info->xfsr[0] &= 0xffffffff00000000UL;
514                 child->thread_info->xfsr[0] |= fsr;
515                 if (!(child->thread_info->fpsaved[0] & FPRS_FEF))
516                         child->thread_info->gsr[0] = 0;
517                 child->thread_info->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
518                 pt_succ_return(regs, 0);
519                 goto out_tsk;
520         }
521
522         case PTRACE_SETFPREGS64: {
523                 struct fps {
524                         unsigned int regs[64];
525                         unsigned long fsr;
526                 };
527                 struct fps __user *fps = (struct fps __user *) addr;
528                 unsigned long *fpregs = child->thread_info->fpregs;
529
530                 if (copy_from_user(fpregs, &fps->regs[0],
531                                    (64 * sizeof(unsigned int))) ||
532                     __get_user(child->thread_info->xfsr[0], (&fps->fsr))) {
533                         pt_error_return(regs, EFAULT);
534                         goto out_tsk;
535                 }
536                 if (!(child->thread_info->fpsaved[0] & FPRS_FEF))
537                         child->thread_info->gsr[0] = 0;
538                 child->thread_info->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
539                 pt_succ_return(regs, 0);
540                 goto out_tsk;
541         }
542
543         case PTRACE_READTEXT:
544         case PTRACE_READDATA: {
545                 int res = ptrace_readdata(child, addr,
546                                           (char __user *)addr2, data);
547                 if (res == data) {
548                         pt_succ_return(regs, 0);
549                         goto out_tsk;
550                 }
551                 if (res >= 0)
552                         res = -EIO;
553                 pt_error_return(regs, -res);
554                 goto out_tsk;
555         }
556
557         case PTRACE_WRITETEXT:
558         case PTRACE_WRITEDATA: {
559                 int res = ptrace_writedata(child, (char __user *) addr2,
560                                            addr, data);
561                 if (res == data) {
562                         pt_succ_return(regs, 0);
563                         goto out_tsk;
564                 }
565                 if (res >= 0)
566                         res = -EIO;
567                 pt_error_return(regs, -res);
568                 goto out_tsk;
569         }
570         case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
571                 addr = 1;
572
573         case PTRACE_CONT: { /* restart after signal. */
574                 if (!valid_signal(data)) {
575                         pt_error_return(regs, EIO);
576                         goto out_tsk;
577                 }
578
579                 if (request == PTRACE_SYSCALL) {
580                         set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
581                 } else {
582                         clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
583                 }
584
585                 child->exit_code = data;
586 #ifdef DEBUG_PTRACE
587                 printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
588                         child->pid, child->exit_code,
589                         child->thread_info->kregs->tpc,
590                         child->thread_info->kregs->tnpc);
591                        
592 #endif
593                 wake_up_process(child);
594                 pt_succ_return(regs, 0);
595                 goto out_tsk;
596         }
597
598 /*
599  * make the child exit.  Best I can do is send it a sigkill. 
600  * perhaps it should be put in the status that it wants to 
601  * exit.
602  */
603         case PTRACE_KILL: {
604                 if (child->exit_state == EXIT_ZOMBIE) { /* already dead */
605                         pt_succ_return(regs, 0);
606                         goto out_tsk;
607                 }
608                 child->exit_code = SIGKILL;
609                 wake_up_process(child);
610                 pt_succ_return(regs, 0);
611                 goto out_tsk;
612         }
613
614         case PTRACE_SUNDETACH: { /* detach a process that was attached. */
615                 int error = ptrace_detach(child, data);
616                 if (error) {
617                         pt_error_return(regs, EIO);
618                         goto out_tsk;
619                 }
620                 pt_succ_return(regs, 0);
621                 goto out_tsk;
622         }
623
624         /* PTRACE_DUMPCORE unsupported... */
625
626         default: {
627                 int err = ptrace_request(child, request, addr, data);
628                 if (err)
629                         pt_error_return(regs, -err);
630                 else
631                         pt_succ_return(regs, 0);
632                 goto out_tsk;
633         }
634         }
635 out_tsk:
636         if (child)
637                 put_task_struct(child);
638 out:
639         unlock_kernel();
640 }
641
642 asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
643 {
644         /* do the secure computing check first */
645         secure_computing(regs->u_regs[UREG_G1]);
646
647         if (unlikely(current->audit_context) && syscall_exit_p) {
648                 unsigned long tstate = regs->tstate;
649                 int result = AUDITSC_SUCCESS;
650
651                 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
652                         result = AUDITSC_FAILURE;
653
654                 audit_syscall_exit(current, result, regs->u_regs[UREG_I0]);
655         }
656
657         if (!(current->ptrace & PT_PTRACED))
658                 goto out;
659
660         if (!test_thread_flag(TIF_SYSCALL_TRACE))
661                 goto out;
662
663         ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
664                                  ? 0x80 : 0));
665
666         /*
667          * this isn't the same as continuing with a signal, but it will do
668          * for normal use.  strace only continues with a signal if the
669          * stopping signal is not SIGTRAP.  -brl
670          */
671         if (current->exit_code) {
672                 send_sig(current->exit_code, current, 1);
673                 current->exit_code = 0;
674         }
675
676 out:
677         if (unlikely(current->audit_context) && !syscall_exit_p)
678                 audit_syscall_entry(current,
679                                     (test_thread_flag(TIF_32BIT) ?
680                                      AUDIT_ARCH_SPARC :
681                                      AUDIT_ARCH_SPARC64),
682                                     regs->u_regs[UREG_G1],
683                                     regs->u_regs[UREG_I0],
684                                     regs->u_regs[UREG_I1],
685                                     regs->u_regs[UREG_I2],
686                                     regs->u_regs[UREG_I3]);
687 }