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Linux-2.6.12-rc2
[net-next-2.6.git] / arch / frv / kernel / ptrace.c
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1da177e4
LT		 1/* ptrace.c: FRV specific parts of process tracing
2 *
3 * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 * - Derived from arch/m68k/kernel/ptrace.c
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <linux/kernel.h>
14#include <linux/sched.h>
15#include <linux/mm.h>
16#include <linux/smp.h>
17#include <linux/smp_lock.h>
18#include <linux/errno.h>
19#include <linux/ptrace.h>
20#include <linux/user.h>
21#include <linux/config.h>
22#include <linux/security.h>
23
24#include <asm/uaccess.h>
25#include <asm/page.h>
26#include <asm/pgtable.h>
27#include <asm/system.h>
28#include <asm/processor.h>
29#include <asm/unistd.h>
30
31/*
32 * does not yet catch signals sent when the child dies.
33 * in exit.c or in signal.c.
34 */
35
36/*
37 * Get contents of register REGNO in task TASK.
38 */
39static inline long get_reg(struct task_struct *task, int regno)
40{
41 struct user_context *user = task->thread.user;
42
43 if (regno < 0 || regno >= PT__END)
44 return 0;
45
46 return ((unsigned long *) user)[regno];
47}
48
49/*
50 * Write contents of register REGNO in task TASK.
51 */
52static inline int put_reg(struct task_struct *task, int regno,
53 unsigned long data)
54{
55 struct user_context *user = task->thread.user;
56
57 if (regno < 0 || regno >= PT__END)
58 return -EIO;
59
60 switch (regno) {
61 case PT_GR(0):
62 return 0;
63 case PT_PSR:
64 case PT__STATUS:
65 return -EIO;
66 default:
67 ((unsigned long *) user)[regno] = data;
68 return 0;
69 }
70}
71
72/*
73 * check that an address falls within the bounds of the target process's memory mappings
74 */
75static inline int is_user_addr_valid(struct task_struct *child,
76 unsigned long start, unsigned long len)
77{
78#ifdef CONFIG_MMU
79 if (start >= PAGE_OFFSET || len > PAGE_OFFSET - start)
80 return -EIO;
81 return 0;
82#else
83 struct vm_list_struct *vml;
84
85 for (vml = child->mm->context.vmlist; vml; vml = vml->next)
86 if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end)
87 return 0;
88
89 return -EIO;
90#endif
91}
92
93/*
94 * Called by kernel/ptrace.c when detaching..
95 *
96 * Control h/w single stepping
97 */
98void ptrace_disable(struct task_struct *child)
99{
100 child->thread.frame0->__status &= ~REG__STATUS_STEP;
101}
102
103void ptrace_enable(struct task_struct *child)
104{
105 child->thread.frame0->__status |= REG__STATUS_STEP;
106}
107
108asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
109{
110 struct task_struct *child;
111 unsigned long tmp;
112 int ret;
113
114 lock_kernel();
115 ret = -EPERM;
116 if (request == PTRACE_TRACEME) {
117 /* are we already being traced? */
118 if (current->ptrace & PT_PTRACED)
119 goto out;
120 ret = security_ptrace(current->parent, current);
121 if (ret)
122 goto out;
123 /* set the ptrace bit in the process flags. */
124 current->ptrace |= PT_PTRACED;
125 ret = 0;
126 goto out;
127 }
128 ret = -ESRCH;
129 read_lock(&tasklist_lock);
130 child = find_task_by_pid(pid);
131 if (child)
132 get_task_struct(child);
133 read_unlock(&tasklist_lock);
134 if (!child)
135 goto out;
136
137 ret = -EPERM;
138 if (pid == 1) /* you may not mess with init */
139 goto out_tsk;
140
141 if (request == PTRACE_ATTACH) {
142 ret = ptrace_attach(child);
143 goto out_tsk;
144 }
145
146 ret = ptrace_check_attach(child, request == PTRACE_KILL);
147 if (ret < 0)
148 goto out_tsk;
149
150 switch (request) {
151 /* when I and D space are separate, these will need to be fixed. */
152 case PTRACE_PEEKTEXT: /* read word at location addr. */
153 case PTRACE_PEEKDATA: {
154 int copied;
155
156 ret = -EIO;
157 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
158 break;
159
160 copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
161 if (copied != sizeof(tmp))
162 break;
163
164 ret = put_user(tmp,(unsigned long *) data);
165 break;
166 }
167
168 /* read the word at location addr in the USER area. */
169 case PTRACE_PEEKUSR: {
170 tmp = 0;
171 ret = -EIO;
172 if ((addr & 3) || addr < 0)
173 break;
174
175 ret = 0;
176 switch (addr >> 2) {
177 case 0 ... PT__END - 1:
178 tmp = get_reg(child, addr >> 2);
179 break;
180
181 case PT__END + 0:
182 tmp = child->mm->end_code - child->mm->start_code;
183 break;
184
185 case PT__END + 1:
186 tmp = child->mm->end_data - child->mm->start_data;
187 break;
188
189 case PT__END + 2:
190 tmp = child->mm->start_stack - child->mm->start_brk;
191 break;
192
193 case PT__END + 3:
194 tmp = child->mm->start_code;
195 break;
196
197 case PT__END + 4:
198 tmp = child->mm->start_stack;
199 break;
200
201 default:
202 ret = -EIO;
203 break;
204 }
205
206 if (ret == 0)
207 ret = put_user(tmp, (unsigned long *) data);
208 break;
209 }
210
211 /* when I and D space are separate, this will have to be fixed. */
212 case PTRACE_POKETEXT: /* write the word at location addr. */
213 case PTRACE_POKEDATA:
214 ret = -EIO;
215 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
216 break;
217 if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
218 break;
219 ret = 0;
220 break;
221
222 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
223 ret = -EIO;
224 if ((addr & 3) || addr < 0)
225 break;
226
227 ret = 0;
228 switch (addr >> 2) {
229 case 0 ... PT__END-1:
230 ret = put_reg(child, addr >> 2, data);
231 break;
232
233 default:
234 ret = -EIO;
235 break;
236 }
237 break;
238
239 case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
240 case PTRACE_CONT: /* restart after signal. */
241 ret = -EIO;
242 if ((unsigned long) data > _NSIG)
243 break;
244 if (request == PTRACE_SYSCALL)
245 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
246 else
247 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
248 child->exit_code = data;
249 ptrace_disable(child);
250 wake_up_process(child);
251 ret = 0;
252 break;
253
254 /* make the child exit. Best I can do is send it a sigkill.
255 * perhaps it should be put in the status that it wants to
256 * exit.
257 */
258 case PTRACE_KILL:
259 ret = 0;
260 if (child->exit_state == EXIT_ZOMBIE) /* already dead */
261 break;
262 child->exit_code = SIGKILL;
263 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
264 ptrace_disable(child);
265 wake_up_process(child);
266 break;
267
268 case PTRACE_SINGLESTEP: /* set the trap flag. */
269 ret = -EIO;
270 if ((unsigned long) data > _NSIG)
271 break;
272 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
273 ptrace_enable(child);
274 child->exit_code = data;
275 wake_up_process(child);
276 ret = 0;
277 break;
278
279 case PTRACE_DETACH: /* detach a process that was attached. */
280 ret = ptrace_detach(child, data);
281 break;
282
283 case PTRACE_GETREGS: { /* Get all integer regs from the child. */
284 int i;
285 for (i = 0; i < PT__GPEND; i++) {
286 tmp = get_reg(child, i);
287 if (put_user(tmp, (unsigned long *) data)) {
288 ret = -EFAULT;
289 break;
290 }
291 data += sizeof(long);
292 }
293 ret = 0;
294 break;
295 }
296
297 case PTRACE_SETREGS: { /* Set all integer regs in the child. */
298 int i;
299 for (i = 0; i < PT__GPEND; i++) {
300 if (get_user(tmp, (unsigned long *) data)) {
301 ret = -EFAULT;
302 break;
303 }
304 put_reg(child, i, tmp);
305 data += sizeof(long);
306 }
307 ret = 0;
308 break;
309 }
310
311 case PTRACE_GETFPREGS: { /* Get the child FP/Media state. */
312 ret = 0;
313 if (copy_to_user((void *) data,
314 &child->thread.user->f,
315 sizeof(child->thread.user->f)))
316 ret = -EFAULT;
317 break;
318 }
319
320 case PTRACE_SETFPREGS: { /* Set the child FP/Media state. */
321 ret = 0;
322 if (copy_from_user(&child->thread.user->f,
323 (void *) data,
324 sizeof(child->thread.user->f)))
325 ret = -EFAULT;
326 break;
327 }
328
329 case PTRACE_GETFDPIC:
330 tmp = 0;
331 switch (addr) {
332 case PTRACE_GETFDPIC_EXEC:
333 tmp = child->mm->context.exec_fdpic_loadmap;
334 break;
335 case PTRACE_GETFDPIC_INTERP:
336 tmp = child->mm->context.interp_fdpic_loadmap;
337 break;
338 default:
339 break;
340 }
341
342 ret = 0;
343 if (put_user(tmp, (unsigned long *) data)) {
344 ret = -EFAULT;
345 break;
346 }
347 break;
348
349 default:
350 ret = -EIO;
351 break;
352 }
353out_tsk:
354 put_task_struct(child);
355out:
356 unlock_kernel();
357 return ret;
358}
359
360int __nongprelbss kstrace;
361
362static const struct {
363 const char *name;
364 unsigned argmask;
365} __syscall_name_table[NR_syscalls] = {
366 [0] = { "restart_syscall" },
367 [1] = { "exit", 0x000001 },
368 [2] = { "fork", 0xffffff },
369 [3] = { "read", 0x000141 },
370 [4] = { "write", 0x000141 },
371 [5] = { "open", 0x000235 },
372 [6] = { "close", 0x000001 },
373 [7] = { "waitpid", 0x000141 },
374 [8] = { "creat", 0x000025 },
375 [9] = { "link", 0x000055 },
376 [10] = { "unlink", 0x000005 },
377 [11] = { "execve", 0x000445 },
378 [12] = { "chdir", 0x000005 },
379 [13] = { "time", 0x000004 },
380 [14] = { "mknod", 0x000325 },
381 [15] = { "chmod", 0x000025 },
382 [16] = { "lchown", 0x000025 },
383 [17] = { "break" },
384 [18] = { "oldstat", 0x000045 },
385 [19] = { "lseek", 0x000131 },
386 [20] = { "getpid", 0xffffff },
387 [21] = { "mount", 0x043555 },
388 [22] = { "umount", 0x000005 },
389 [23] = { "setuid", 0x000001 },
390 [24] = { "getuid", 0xffffff },
391 [25] = { "stime", 0x000004 },
392 [26] = { "ptrace", 0x004413 },
393 [27] = { "alarm", 0x000001 },
394 [28] = { "oldfstat", 0x000041 },
395 [29] = { "pause", 0xffffff },
396 [30] = { "utime", 0x000045 },
397 [31] = { "stty" },
398 [32] = { "gtty" },
399 [33] = { "access", 0x000025 },
400 [34] = { "nice", 0x000001 },
401 [35] = { "ftime" },
402 [36] = { "sync", 0xffffff },
403 [37] = { "kill", 0x000011 },
404 [38] = { "rename", 0x000055 },
405 [39] = { "mkdir", 0x000025 },
406 [40] = { "rmdir", 0x000005 },
407 [41] = { "dup", 0x000001 },
408 [42] = { "pipe", 0x000004 },
409 [43] = { "times", 0x000004 },
410 [44] = { "prof" },
411 [45] = { "brk", 0x000004 },
412 [46] = { "setgid", 0x000001 },
413 [47] = { "getgid", 0xffffff },
414 [48] = { "signal", 0x000041 },
415 [49] = { "geteuid", 0xffffff },
416 [50] = { "getegid", 0xffffff },
417 [51] = { "acct", 0x000005 },
418 [52] = { "umount2", 0x000035 },
419 [53] = { "lock" },
420 [54] = { "ioctl", 0x000331 },
421 [55] = { "fcntl", 0x000331 },
422 [56] = { "mpx" },
423 [57] = { "setpgid", 0x000011 },
424 [58] = { "ulimit" },
425 [60] = { "umask", 0x000002 },
426 [61] = { "chroot", 0x000005 },
427 [62] = { "ustat", 0x000043 },
428 [63] = { "dup2", 0x000011 },
429 [64] = { "getppid", 0xffffff },
430 [65] = { "getpgrp", 0xffffff },
431 [66] = { "setsid", 0xffffff },
432 [67] = { "sigaction" },
433 [68] = { "sgetmask" },
434 [69] = { "ssetmask" },
435 [70] = { "setreuid" },
436 [71] = { "setregid" },
437 [72] = { "sigsuspend" },
438 [73] = { "sigpending" },
439 [74] = { "sethostname" },
440 [75] = { "setrlimit" },
441 [76] = { "getrlimit" },
442 [77] = { "getrusage" },
443 [78] = { "gettimeofday" },
444 [79] = { "settimeofday" },
445 [80] = { "getgroups" },
446 [81] = { "setgroups" },
447 [82] = { "select" },
448 [83] = { "symlink" },
449 [84] = { "oldlstat" },
450 [85] = { "readlink" },
451 [86] = { "uselib" },
452 [87] = { "swapon" },
453 [88] = { "reboot" },
454 [89] = { "readdir" },
455 [91] = { "munmap", 0x000034 },
456 [92] = { "truncate" },
457 [93] = { "ftruncate" },
458 [94] = { "fchmod" },
459 [95] = { "fchown" },
460 [96] = { "getpriority" },
461 [97] = { "setpriority" },
462 [99] = { "statfs" },
463 [100] = { "fstatfs" },
464 [102] = { "socketcall" },
465 [103] = { "syslog" },
466 [104] = { "setitimer" },
467 [105] = { "getitimer" },
468 [106] = { "stat" },
469 [107] = { "lstat" },
470 [108] = { "fstat" },
471 [111] = { "vhangup" },
472 [114] = { "wait4" },
473 [115] = { "swapoff" },
474 [116] = { "sysinfo" },
475 [117] = { "ipc" },
476 [118] = { "fsync" },
477 [119] = { "sigreturn" },
478 [120] = { "clone" },
479 [121] = { "setdomainname" },
480 [122] = { "uname" },
481 [123] = { "modify_ldt" },
482 [123] = { "cacheflush" },
483 [124] = { "adjtimex" },
484 [125] = { "mprotect" },
485 [126] = { "sigprocmask" },
486 [127] = { "create_module" },
487 [128] = { "init_module" },
488 [129] = { "delete_module" },
489 [130] = { "get_kernel_syms" },
490 [131] = { "quotactl" },
491 [132] = { "getpgid" },
492 [133] = { "fchdir" },
493 [134] = { "bdflush" },
494 [135] = { "sysfs" },
495 [136] = { "personality" },
496 [137] = { "afs_syscall" },
497 [138] = { "setfsuid" },
498 [139] = { "setfsgid" },
499 [140] = { "_llseek", 0x014331 },
500 [141] = { "getdents" },
501 [142] = { "_newselect", 0x000141 },
502 [143] = { "flock" },
503 [144] = { "msync" },
504 [145] = { "readv" },
505 [146] = { "writev" },
506 [147] = { "getsid", 0x000001 },
507 [148] = { "fdatasync", 0x000001 },
508 [149] = { "_sysctl", 0x000004 },
509 [150] = { "mlock" },
510 [151] = { "munlock" },
511 [152] = { "mlockall" },
512 [153] = { "munlockall" },
513 [154] = { "sched_setparam" },
514 [155] = { "sched_getparam" },
515 [156] = { "sched_setscheduler" },
516 [157] = { "sched_getscheduler" },
517 [158] = { "sched_yield" },
518 [159] = { "sched_get_priority_max" },
519 [160] = { "sched_get_priority_min" },
520 [161] = { "sched_rr_get_interval" },
521 [162] = { "nanosleep", 0x000044 },
522 [163] = { "mremap" },
523 [164] = { "setresuid" },
524 [165] = { "getresuid" },
525 [166] = { "vm86" },
526 [167] = { "query_module" },
527 [168] = { "poll" },
528 [169] = { "nfsservctl" },
529 [170] = { "setresgid" },
530 [171] = { "getresgid" },
531 [172] = { "prctl", 0x333331 },
532 [173] = { "rt_sigreturn", 0xffffff },
533 [174] = { "rt_sigaction", 0x001441 },
534 [175] = { "rt_sigprocmask", 0x001441 },
535 [176] = { "rt_sigpending", 0x000014 },
536 [177] = { "rt_sigtimedwait", 0x001444 },
537 [178] = { "rt_sigqueueinfo", 0x000411 },
538 [179] = { "rt_sigsuspend", 0x000014 },
539 [180] = { "pread", 0x003341 },
540 [181] = { "pwrite", 0x003341 },
541 [182] = { "chown", 0x000115 },
542 [183] = { "getcwd" },
543 [184] = { "capget" },
544 [185] = { "capset" },
545 [186] = { "sigaltstack" },
546 [187] = { "sendfile" },
547 [188] = { "getpmsg" },
548 [189] = { "putpmsg" },
549 [190] = { "vfork", 0xffffff },
550 [191] = { "ugetrlimit" },
551 [192] = { "mmap2", 0x313314 },
552 [193] = { "truncate64" },
553 [194] = { "ftruncate64" },
554 [195] = { "stat64", 0x000045 },
555 [196] = { "lstat64", 0x000045 },
556 [197] = { "fstat64", 0x000041 },
557 [198] = { "lchown32" },
558 [199] = { "getuid32", 0xffffff },
559 [200] = { "getgid32", 0xffffff },
560 [201] = { "geteuid32", 0xffffff },
561 [202] = { "getegid32", 0xffffff },
562 [203] = { "setreuid32" },
563 [204] = { "setregid32" },
564 [205] = { "getgroups32" },
565 [206] = { "setgroups32" },
566 [207] = { "fchown32" },
567 [208] = { "setresuid32" },
568 [209] = { "getresuid32" },
569 [210] = { "setresgid32" },
570 [211] = { "getresgid32" },
571 [212] = { "chown32" },
572 [213] = { "setuid32" },
573 [214] = { "setgid32" },
574 [215] = { "setfsuid32" },
575 [216] = { "setfsgid32" },
576 [217] = { "pivot_root" },
577 [218] = { "mincore" },
578 [219] = { "madvise" },
579 [220] = { "getdents64" },
580 [221] = { "fcntl64" },
581 [223] = { "security" },
582 [224] = { "gettid" },
583 [225] = { "readahead" },
584 [226] = { "setxattr" },
585 [227] = { "lsetxattr" },
586 [228] = { "fsetxattr" },
587 [229] = { "getxattr" },
588 [230] = { "lgetxattr" },
589 [231] = { "fgetxattr" },
590 [232] = { "listxattr" },
591 [233] = { "llistxattr" },
592 [234] = { "flistxattr" },
593 [235] = { "removexattr" },
594 [236] = { "lremovexattr" },
595 [237] = { "fremovexattr" },
596 [238] = { "tkill" },
597 [239] = { "sendfile64" },
598 [240] = { "futex" },
599 [241] = { "sched_setaffinity" },
600 [242] = { "sched_getaffinity" },
601 [243] = { "set_thread_area" },
602 [244] = { "get_thread_area" },
603 [245] = { "io_setup" },
604 [246] = { "io_destroy" },
605 [247] = { "io_getevents" },
606 [248] = { "io_submit" },
607 [249] = { "io_cancel" },
608 [250] = { "fadvise64" },
609 [252] = { "exit_group", 0x000001 },
610 [253] = { "lookup_dcookie" },
611 [254] = { "epoll_create" },
612 [255] = { "epoll_ctl" },
613 [256] = { "epoll_wait" },
614 [257] = { "remap_file_pages" },
615 [258] = { "set_tid_address" },
616 [259] = { "timer_create" },
617 [260] = { "timer_settime" },
618 [261] = { "timer_gettime" },
619 [262] = { "timer_getoverrun" },
620 [263] = { "timer_delete" },
621 [264] = { "clock_settime" },
622 [265] = { "clock_gettime" },
623 [266] = { "clock_getres" },
624 [267] = { "clock_nanosleep" },
625 [268] = { "statfs64" },
626 [269] = { "fstatfs64" },
627 [270] = { "tgkill" },
628 [271] = { "utimes" },
629 [272] = { "fadvise64_64" },
630 [273] = { "vserver" },
631 [274] = { "mbind" },
632 [275] = { "get_mempolicy" },
633 [276] = { "set_mempolicy" },
634 [277] = { "mq_open" },
635 [278] = { "mq_unlink" },
636 [279] = { "mq_timedsend" },
637 [280] = { "mq_timedreceive" },
638 [281] = { "mq_notify" },
639 [282] = { "mq_getsetattr" },
640 [283] = { "sys_kexec_load" },
641};
642
643asmlinkage void do_syscall_trace(int leaving)
644{
645#if 0
646 unsigned long *argp;
647 const char *name;
648 unsigned argmask;
649 char buffer[16];
650
651 if (!kstrace)
652 return;
653
654 if (!current->mm)
655 return;
656
657 if (__frame->gr7 == __NR_close)
658 return;
659
660#if 0
661 if (__frame->gr7 != __NR_mmap2 &&
662 __frame->gr7 != __NR_vfork &&
663 __frame->gr7 != __NR_execve &&
664 __frame->gr7 != __NR_exit)
665 return;
666#endif
667
668 argmask = 0;
669 name = NULL;
670 if (__frame->gr7 < NR_syscalls) {
671 name = __syscall_name_table[__frame->gr7].name;
672 argmask = __syscall_name_table[__frame->gr7].argmask;
673 }
674 if (!name) {
675 sprintf(buffer, "sys_%lx", __frame->gr7);
676 name = buffer;
677 }
678
679 if (!leaving) {
680 if (!argmask) {
681 printk(KERN_CRIT "[%d] %s(%lx,%lx,%lx,%lx,%lx,%lx)\n",
682 current->pid,
683 name,
684 __frame->gr8,
685 __frame->gr9,
686 __frame->gr10,
687 __frame->gr11,
688 __frame->gr12,
689 __frame->gr13);
690 }
691 else if (argmask == 0xffffff) {
692 printk(KERN_CRIT "[%d] %s()\n",
693 current->pid,
694 name);
695 }
696 else {
697 printk(KERN_CRIT "[%d] %s(",
698 current->pid,
699 name);
700
701 argp = &__frame->gr8;
702
703 do {
704 switch (argmask & 0xf) {
705 case 1:
706 printk("%ld", (long) *argp);
707 break;
708 case 2:
709 printk("%lo", *argp);
710 break;
711 case 3:
712 printk("%lx", *argp);
713 break;
714 case 4:
715 printk("%p", (void *) *argp);
716 break;
717 case 5:
718 printk("\"%s\"", (char *) *argp);
719 break;
720 }
721
722 argp++;
723 argmask >>= 4;
724 if (argmask)
725 printk(",");
726
727 } while (argmask);
728
729 printk(")\n");
730 }
731 }
732 else {
733 if ((int)__frame->gr8 > -4096 && (int)__frame->gr8 < 4096)
734 printk(KERN_CRIT "[%d] %s() = %ld\n", current->pid, name, __frame->gr8);
735 else
736 printk(KERN_CRIT "[%d] %s() = %lx\n", current->pid, name, __frame->gr8);
737 }
738 return;
739#endif
740
741 if (!test_thread_flag(TIF_SYSCALL_TRACE))
742 return;
743
744 if (!(current->ptrace & PT_PTRACED))
745 return;
746
747 /* we need to indicate entry or exit to strace */
748 if (leaving)
749 __frame->__status |= REG__STATUS_SYSC_EXIT;
750 else
751 __frame->__status |= REG__STATUS_SYSC_ENTRY;
752
753 ptrace_notify(SIGTRAP);
754
755 /*
756 * this isn't the same as continuing with a signal, but it will do
757 * for normal use. strace only continues with a signal if the
758 * stopping signal is not SIGTRAP. -brl
759 */
760 if (current->exit_code) {
761 send_sig(current->exit_code, current, 1);
762 current->exit_code = 0;
763 }
764}
Clone of davem's net-next-2.6 tree