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[PATCH] drop gfp_mask in audit_log_exit()
[deliverable/linux.git] / arch / sparc64 / kernel / ptrace.c
CommitLineData
1da177e4
LT		 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>
f7ceba36
DM		 22#include <linux/seccomp.h>
23#include <linux/audit.h>
7ed20e1a 24#include <linux/signal.h>
1da177e4
LT		 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>
6a9b490d 33#include <asm/page.h>
717463d8 34#include <asm/cpudata.h>
1da177e4
LT		 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 */
41static 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
49static 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
57static inline void
58pt_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
77static void
78pt_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
90char *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 */
106void ptrace_disable(struct task_struct *child)
107{
108 /* nothing to do */
109}
110
dadeafdf
DM		 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 */
121void 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
7adb37fe
DM		 127 if (tlb_type == hypervisor)
128 return;
129
dadeafdf
DM		 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 */
6a9b490d 136 if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
dadeafdf
DM		 137 unsigned long start = __pa(kaddr);
138 unsigned long end = start + len;
717463d8
DM		 139 unsigned long dcache_line_size;
140
141 dcache_line_size = local_cpu_data().dcache_line_size;
dadeafdf
DM		 142
143 if (tlb_type == spitfire) {
717463d8 144 for (; start < end; start += dcache_line_size)
6a9b490d 145 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
dadeafdf 146 } else {
717463d8
DM		 147 start &= ~(dcache_line_size - 1);
148 for (; start < end; start += dcache_line_size)
dadeafdf
DM		 149 __asm__ __volatile__(
150 "stxa %%g0, [%0] %1\n\t"
151 "membar #Sync"
152 : /* no outputs */
6a9b490d 153 : "r" (start),
dadeafdf
DM		 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;
717463d8
DM		 161 unsigned long icache_line_size;
162
163 icache_line_size = local_cpu_data().icache_line_size;
dadeafdf 164
717463d8 165 for (; start < end; start += icache_line_size)
dadeafdf
DM		 166 flushi(start);
167 }
168}
169
1da177e4
LT		 170asmlinkage 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) {
6b9c7ed8 204 ret = ptrace_traceme();
1da177e4
LT		 205 pt_succ_return(regs, 0);
206 goto out;
207 }
6b9c7ed8
CH		 208
209 child = ptrace_get_task_struct(pid);
210 if (IS_ERR(child)) {
211 ret = PTR_ERR(child);
212 pt_error_return(regs, -ret);
1da177e4
LT		 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) {
1759e58e
DM		 247 case PTRACE_PEEKUSR:
248 if (addr != 0)
249 pt_error_return(regs, EIO);
250 else
251 pt_succ_return(regs, 0);
252 goto out_tsk;
253
1da177e4
LT		 254 case PTRACE_PEEKTEXT: /* read word at location addr. */
255 case PTRACE_PEEKDATA: {
256 unsigned long tmp64;
257 unsigned int tmp32;
258 int res, copied;
259
260 res = -EIO;
261 if (test_thread_flag(TIF_32BIT)) {
262 copied = access_process_vm(child, addr,
263 &tmp32, sizeof(tmp32), 0);
264 tmp64 = (unsigned long) tmp32;
265 if (copied == sizeof(tmp32))
266 res = 0;
267 } else {
268 copied = access_process_vm(child, addr,
269 &tmp64, sizeof(tmp64), 0);
270 if (copied == sizeof(tmp64))
271 res = 0;
272 }
273 if (res < 0)
274 pt_error_return(regs, -res);
275 else
276 pt_os_succ_return(regs, tmp64, (void __user *) data);
dadeafdf 277 goto out_tsk;
1da177e4
LT		 278 }
279
280 case PTRACE_POKETEXT: /* write the word at location addr. */
281 case PTRACE_POKEDATA: {
282 unsigned long tmp64;
283 unsigned int tmp32;
284 int copied, res = -EIO;
285
286 if (test_thread_flag(TIF_32BIT)) {
287 tmp32 = data;
288 copied = access_process_vm(child, addr,
289 &tmp32, sizeof(tmp32), 1);
290 if (copied == sizeof(tmp32))
291 res = 0;
292 } else {
293 tmp64 = data;
294 copied = access_process_vm(child, addr,
295 &tmp64, sizeof(tmp64), 1);
296 if (copied == sizeof(tmp64))
297 res = 0;
298 }
299 if (res < 0)
300 pt_error_return(regs, -res);
301 else
302 pt_succ_return(regs, res);
dadeafdf 303 goto out_tsk;
1da177e4
LT		 304 }
305
306 case PTRACE_GETREGS: {
307 struct pt_regs32 __user *pregs =
308 (struct pt_regs32 __user *) addr;
26ecbdea 309 struct pt_regs *cregs = task_pt_regs(child);
1da177e4
LT		 310 int rval;
311
312 if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
313 __put_user(cregs->tpc, (&pregs->pc)) ||
314 __put_user(cregs->tnpc, (&pregs->npc)) ||
315 __put_user(cregs->y, (&pregs->y))) {
316 pt_error_return(regs, EFAULT);
317 goto out_tsk;
318 }
319 for (rval = 1; rval < 16; rval++)
320 if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
321 pt_error_return(regs, EFAULT);
322 goto out_tsk;
323 }
324 pt_succ_return(regs, 0);
325#ifdef DEBUG_PTRACE
326 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
327#endif
328 goto out_tsk;
329 }
330
331 case PTRACE_GETREGS64: {
332 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
26ecbdea 333 struct pt_regs *cregs = task_pt_regs(child);
1da177e4
LT		 334 unsigned long tpc = cregs->tpc;
335 int rval;
336
f3169641 337 if ((task_thread_info(child)->flags & _TIF_32BIT) != 0)
1da177e4
LT		 338 tpc &= 0xffffffff;
339 if (__put_user(cregs->tstate, (&pregs->tstate)) ||
340 __put_user(tpc, (&pregs->tpc)) ||
341 __put_user(cregs->tnpc, (&pregs->tnpc)) ||
342 __put_user(cregs->y, (&pregs->y))) {
343 pt_error_return(regs, EFAULT);
344 goto out_tsk;
345 }
346 for (rval = 1; rval < 16; rval++)
347 if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) {
348 pt_error_return(regs, EFAULT);
349 goto out_tsk;
350 }
351 pt_succ_return(regs, 0);
352#ifdef DEBUG_PTRACE
353 printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
354#endif
355 goto out_tsk;
356 }
357
358 case PTRACE_SETREGS: {
359 struct pt_regs32 __user *pregs =
360 (struct pt_regs32 __user *) addr;
26ecbdea 361 struct pt_regs *cregs = task_pt_regs(child);
1da177e4
LT		 362 unsigned int psr, pc, npc, y;
363 int i;
364
365 /* Must be careful, tracing process can only set certain
366 * bits in the psr.
367 */
368 if (__get_user(psr, (&pregs->psr)) ||
369 __get_user(pc, (&pregs->pc)) ||
370 __get_user(npc, (&pregs->npc)) ||
371 __get_user(y, (&pregs->y))) {
372 pt_error_return(regs, EFAULT);
373 goto out_tsk;
374 }
375 cregs->tstate &= ~(TSTATE_ICC);
376 cregs->tstate |= psr_to_tstate_icc(psr);
377 if (!((pc | npc) & 3)) {
378 cregs->tpc = pc;
379 cregs->tnpc = npc;
380 }
381 cregs->y = y;
382 for (i = 1; i < 16; i++) {
383 if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
384 pt_error_return(regs, EFAULT);
385 goto out_tsk;
386 }
387 }
388 pt_succ_return(regs, 0);
389 goto out_tsk;
390 }
391
392 case PTRACE_SETREGS64: {
393 struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
26ecbdea 394 struct pt_regs *cregs = task_pt_regs(child);
1da177e4
LT		 395 unsigned long tstate, tpc, tnpc, y;
396 int i;
397
398 /* Must be careful, tracing process can only set certain
399 * bits in the psr.
400 */
401 if (__get_user(tstate, (&pregs->tstate)) ||
402 __get_user(tpc, (&pregs->tpc)) ||
403 __get_user(tnpc, (&pregs->tnpc)) ||
404 __get_user(y, (&pregs->y))) {
405 pt_error_return(regs, EFAULT);
406 goto out_tsk;
407 }
f3169641 408 if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) {
1da177e4
LT		 409 tpc &= 0xffffffff;
410 tnpc &= 0xffffffff;
411 }
412 tstate &= (TSTATE_ICC | TSTATE_XCC);
413 cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
414 cregs->tstate |= tstate;
415 if (!((tpc | tnpc) & 3)) {
416 cregs->tpc = tpc;
417 cregs->tnpc = tnpc;
418 }
419 cregs->y = y;
420 for (i = 1; i < 16; i++) {
421 if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) {
422 pt_error_return(regs, EFAULT);
423 goto out_tsk;
424 }
425 }
426 pt_succ_return(regs, 0);
427 goto out_tsk;
428 }
429
430 case PTRACE_GETFPREGS: {
431 struct fps {
432 unsigned int regs[32];
433 unsigned int fsr;
434 unsigned int flags;
435 unsigned int extra;
436 unsigned int fpqd;
437 struct fq {
438 unsigned int insnaddr;
439 unsigned int insn;
440 } fpq[16];
441 };
442 struct fps __user *fps = (struct fps __user *) addr;
f3169641 443 unsigned long *fpregs = task_thread_info(child)->fpregs;
1da177e4
LT		 444
445 if (copy_to_user(&fps->regs[0], fpregs,
446 (32 * sizeof(unsigned int))) ||
f3169641 447 __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) ||
1da177e4
LT		 448 __put_user(0, (&fps->fpqd)) ||
449 __put_user(0, (&fps->flags)) ||
450 __put_user(0, (&fps->extra)) ||
451 clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) {
452 pt_error_return(regs, EFAULT);
453 goto out_tsk;
454 }
455 pt_succ_return(regs, 0);
456 goto out_tsk;
457 }
458
459 case PTRACE_GETFPREGS64: {
460 struct fps {
461 unsigned int regs[64];
462 unsigned long fsr;
463 };
464 struct fps __user *fps = (struct fps __user *) addr;
f3169641 465 unsigned long *fpregs = task_thread_info(child)->fpregs;
1da177e4
LT		 466
467 if (copy_to_user(&fps->regs[0], fpregs,
468 (64 * sizeof(unsigned int))) ||
f3169641 469 __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
1da177e4
LT		 470 pt_error_return(regs, EFAULT);
471 goto out_tsk;
472 }
473 pt_succ_return(regs, 0);
474 goto out_tsk;
475 }
476
477 case PTRACE_SETFPREGS: {
478 struct fps {
479 unsigned int regs[32];
480 unsigned int fsr;
481 unsigned int flags;
482 unsigned int extra;
483 unsigned int fpqd;
484 struct fq {
485 unsigned int insnaddr;
486 unsigned int insn;
487 } fpq[16];
488 };
489 struct fps __user *fps = (struct fps __user *) addr;
f3169641 490 unsigned long *fpregs = task_thread_info(child)->fpregs;
1da177e4
LT		 491 unsigned fsr;
492
493 if (copy_from_user(fpregs, &fps->regs[0],
494 (32 * sizeof(unsigned int))) ||
495 __get_user(fsr, (&fps->fsr))) {
496 pt_error_return(regs, EFAULT);
497 goto out_tsk;
498 }
f3169641
AV		 499 task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL;
500 task_thread_info(child)->xfsr[0] |= fsr;
501 if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
502 task_thread_info(child)->gsr[0] = 0;
503 task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
1da177e4
LT		 504 pt_succ_return(regs, 0);
505 goto out_tsk;
506 }
507
508 case PTRACE_SETFPREGS64: {
509 struct fps {
510 unsigned int regs[64];
511 unsigned long fsr;
512 };
513 struct fps __user *fps = (struct fps __user *) addr;
f3169641 514 unsigned long *fpregs = task_thread_info(child)->fpregs;
1da177e4
LT		 515
516 if (copy_from_user(fpregs, &fps->regs[0],
517 (64 * sizeof(unsigned int))) ||
f3169641 518 __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
1da177e4
LT		 519 pt_error_return(regs, EFAULT);
520 goto out_tsk;
521 }
f3169641
AV		 522 if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
523 task_thread_info(child)->gsr[0] = 0;
524 task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
1da177e4
LT		 525 pt_succ_return(regs, 0);
526 goto out_tsk;
527 }
528
529 case PTRACE_READTEXT:
530 case PTRACE_READDATA: {
531 int res = ptrace_readdata(child, addr,
532 (char __user *)addr2, data);
533 if (res == data) {
534 pt_succ_return(regs, 0);
dadeafdf 535 goto out_tsk;
1da177e4
LT		 536 }
537 if (res >= 0)
538 res = -EIO;
539 pt_error_return(regs, -res);
dadeafdf 540 goto out_tsk;
1da177e4
LT		 541 }
542
543 case PTRACE_WRITETEXT:
544 case PTRACE_WRITEDATA: {
545 int res = ptrace_writedata(child, (char __user *) addr2,
546 addr, data);
547 if (res == data) {
548 pt_succ_return(regs, 0);
dadeafdf 549 goto out_tsk;
1da177e4
LT		 550 }
551 if (res >= 0)
552 res = -EIO;
553 pt_error_return(regs, -res);
dadeafdf 554 goto out_tsk;
1da177e4
LT		 555 }
556 case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
557 addr = 1;
558
559 case PTRACE_CONT: { /* restart after signal. */
7ed20e1a 560 if (!valid_signal(data)) {
1da177e4
LT		 561 pt_error_return(regs, EIO);
562 goto out_tsk;
563 }
1da177e4
LT		 564
565 if (request == PTRACE_SYSCALL) {
566 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
567 } else {
568 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
569 }
570
571 child->exit_code = data;
572#ifdef DEBUG_PTRACE
573 printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
574 child->pid, child->exit_code,
26ecbdea
AV		 575 task_pt_regs(child)->tpc,
576 task_pt_regs(child)->tnpc);
1da177e4
LT		 577
578#endif
579 wake_up_process(child);
580 pt_succ_return(regs, 0);
581 goto out_tsk;
582 }
583
584/*
585 * make the child exit. Best I can do is send it a sigkill.
586 * perhaps it should be put in the status that it wants to
587 * exit.
588 */
589 case PTRACE_KILL: {
590 if (child->exit_state == EXIT_ZOMBIE) { /* already dead */
591 pt_succ_return(regs, 0);
592 goto out_tsk;
593 }
594 child->exit_code = SIGKILL;
595 wake_up_process(child);
596 pt_succ_return(regs, 0);
597 goto out_tsk;
598 }
599
600 case PTRACE_SUNDETACH: { /* detach a process that was attached. */
601 int error = ptrace_detach(child, data);
602 if (error) {
603 pt_error_return(regs, EIO);
604 goto out_tsk;
605 }
606 pt_succ_return(regs, 0);
607 goto out_tsk;
608 }
609
610 /* PTRACE_DUMPCORE unsupported... */
611
731bbe43
DM		 612 case PTRACE_GETEVENTMSG: {
613 int err;
614
615 if (test_thread_flag(TIF_32BIT))
616 err = put_user(child->ptrace_message,
617 (unsigned int __user *) data);
618 else
619 err = put_user(child->ptrace_message,
620 (unsigned long __user *) data);
621 if (err)
622 pt_error_return(regs, -err);
623 else
624 pt_succ_return(regs, 0);
625 break;
626 }
627
1da177e4
LT		 628 default: {
629 int err = ptrace_request(child, request, addr, data);
630 if (err)
631 pt_error_return(regs, -err);
632 else
633 pt_succ_return(regs, 0);
634 goto out_tsk;
635 }
636 }
1da177e4
LT		 637out_tsk:
638 if (child)
639 put_task_struct(child);
640out:
641 unlock_kernel();
642}
643
8d8a6479 644asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1da177e4 645{
bb49bcda 646 /* do the secure computing check first */
8d8a6479 647 secure_computing(regs->u_regs[UREG_G1]);
bb49bcda 648
f7ceba36
DM		 649 if (unlikely(current->audit_context) && syscall_exit_p) {
650 unsigned long tstate = regs->tstate;
651 int result = AUDITSC_SUCCESS;
652
653 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
654 result = AUDITSC_FAILURE;
655
656 audit_syscall_exit(current, result, regs->u_regs[UREG_I0]);
657 }
658
1da177e4 659 if (!(current->ptrace & PT_PTRACED))
f7ceba36
DM		 660 goto out;
661
662 if (!test_thread_flag(TIF_SYSCALL_TRACE))
663 goto out;
664
1da177e4
LT		 665 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
666 ? 0x80 : 0));
667
668 /*
669 * this isn't the same as continuing with a signal, but it will do
670 * for normal use. strace only continues with a signal if the
671 * stopping signal is not SIGTRAP. -brl
672 */
1da177e4 673 if (current->exit_code) {
bb49bcda 674 send_sig(current->exit_code, current, 1);
1da177e4
LT		 675 current->exit_code = 0;
676 }
f7ceba36
DM		 677
678out:
679 if (unlikely(current->audit_context) && !syscall_exit_p)
680 audit_syscall_entry(current,
681 (test_thread_flag(TIF_32BIT) ?
682 AUDIT_ARCH_SPARC :
683 AUDIT_ARCH_SPARC64),
684 regs->u_regs[UREG_G1],
685 regs->u_regs[UREG_I0],
686 regs->u_regs[UREG_I1],
687 regs->u_regs[UREG_I2],
688 regs->u_regs[UREG_I3]);
1da177e4 689}
Linux kernel - Deliverables
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