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Linux 2.6.13-rc4
[linux-2.6/next.git] / arch / frv / kernel / ptrace.c
blobcbe03cba9f02a08dca3b7f59413df2aabf118a82
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 #include <linux/signal.h>
24
25 #include <asm/uaccess.h>
26 #include <asm/page.h>
27 #include <asm/pgtable.h>
28 #include <asm/system.h>
29 #include <asm/processor.h>
30 #include <asm/unistd.h>
31
32 /*
33 * does not yet catch signals sent when the child dies.
34 * in exit.c or in signal.c.
35 */
36
37 /*
38 * Get contents of register REGNO in task TASK.
39 */
40 static inline long get_reg(struct task_struct *task, int regno)
41 {
42 struct user_context *user = task->thread.user;
43
44 if (regno < 0 || regno >= PT__END)
45 return 0;
46
47 return ((unsigned long *) user)[regno];
48 }
49
50 /*
51 * Write contents of register REGNO in task TASK.
52 */
53 static inline int put_reg(struct task_struct *task, int regno,
54 unsigned long data)
55 {
56 struct user_context *user = task->thread.user;
57
58 if (regno < 0 || regno >= PT__END)
59 return -EIO;
60
61 switch (regno) {
62 case PT_GR(0):
63 return 0;
64 case PT_PSR:
65 case PT__STATUS:
66 return -EIO;
67 default:
68 ((unsigned long *) user)[regno] = data;
69 return 0;
70 }
71 }
72
73 /*
74 * check that an address falls within the bounds of the target process's memory mappings
75 */
76 static inline int is_user_addr_valid(struct task_struct *child,
77 unsigned long start, unsigned long len)
78 {
79 #ifdef CONFIG_MMU
80 if (start >= PAGE_OFFSET || len > PAGE_OFFSET - start)
81 return -EIO;
82 return 0;
83 #else
84 struct vm_list_struct *vml;
85
86 for (vml = child->mm->context.vmlist; vml; vml = vml->next)
87 if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end)
88 return 0;
89
90 return -EIO;
91 #endif
92 }
93
94 /*
95 * Called by kernel/ptrace.c when detaching..
96 *
97 * Control h/w single stepping
98 */
99 void ptrace_disable(struct task_struct *child)
100 {
101 child->thread.frame0->__status &= ~REG__STATUS_STEP;
102 }
103
104 void ptrace_enable(struct task_struct *child)
105 {
106 child->thread.frame0->__status |= REG__STATUS_STEP;
107 }
108
109 asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
110 {
111 struct task_struct *child;
112 unsigned long tmp;
113 int ret;
114
115 lock_kernel();
116 ret = -EPERM;
117 if (request == PTRACE_TRACEME) {
118 /* are we already being traced? */
119 if (current->ptrace & PT_PTRACED)
120 goto out;
121 ret = security_ptrace(current->parent, current);
122 if (ret)
123 goto out;
124 /* set the ptrace bit in the process flags. */
125 current->ptrace |= PT_PTRACED;
126 ret = 0;
127 goto out;
128 }
129 ret = -ESRCH;
130 read_lock(&tasklist_lock);
131 child = find_task_by_pid(pid);
132 if (child)
133 get_task_struct(child);
134 read_unlock(&tasklist_lock);
135 if (!child)
136 goto out;
137
138 ret = -EPERM;
139 if (pid == 1) /* you may not mess with init */
140 goto out_tsk;
141
142 if (request == PTRACE_ATTACH) {
143 ret = ptrace_attach(child);
144 goto out_tsk;
145 }
146
147 ret = ptrace_check_attach(child, request == PTRACE_KILL);
148 if (ret < 0)
149 goto out_tsk;
150
151 switch (request) {
152 /* when I and D space are separate, these will need to be fixed. */
153 case PTRACE_PEEKTEXT: /* read word at location addr. */
154 case PTRACE_PEEKDATA: {
155 int copied;
156
157 ret = -EIO;
158 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
159 break;
160
161 copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
162 if (copied != sizeof(tmp))
163 break;
164
165 ret = put_user(tmp,(unsigned long *) data);
166 break;
167 }
168
169 /* read the word at location addr in the USER area. */
170 case PTRACE_PEEKUSR: {
171 tmp = 0;
172 ret = -EIO;
173 if ((addr & 3) || addr < 0)
174 break;
175
176 ret = 0;
177 switch (addr >> 2) {
178 case 0 ... PT__END - 1:
179 tmp = get_reg(child, addr >> 2);
180 break;
181
182 case PT__END + 0:
183 tmp = child->mm->end_code - child->mm->start_code;
184 break;
185
186 case PT__END + 1:
187 tmp = child->mm->end_data - child->mm->start_data;
188 break;
189
190 case PT__END + 2:
191 tmp = child->mm->start_stack - child->mm->start_brk;
192 break;
193
194 case PT__END + 3:
195 tmp = child->mm->start_code;
196 break;
197
198 case PT__END + 4:
199 tmp = child->mm->start_stack;
200 break;
201
202 default:
203 ret = -EIO;
204 break;
205 }
206
207 if (ret == 0)
208 ret = put_user(tmp, (unsigned long *) data);
209 break;
210 }
211
212 /* when I and D space are separate, this will have to be fixed. */
213 case PTRACE_POKETEXT: /* write the word at location addr. */
214 case PTRACE_POKEDATA:
215 ret = -EIO;
216 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
217 break;
218 if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
219 break;
220 ret = 0;
221 break;
222
223 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
224 ret = -EIO;
225 if ((addr & 3) || addr < 0)
226 break;
227
228 ret = 0;
229 switch (addr >> 2) {
230 case 0 ... PT__END-1:
231 ret = put_reg(child, addr >> 2, data);
232 break;
233
234 default:
235 ret = -EIO;
236 break;
237 }
238 break;
239
240 case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
241 case PTRACE_CONT: /* restart after signal. */
242 ret = -EIO;
243 if (!valid_signal(data))
244 break;
245 if (request == PTRACE_SYSCALL)
246 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
247 else
248 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
249 child->exit_code = data;
250 ptrace_disable(child);
251 wake_up_process(child);
252 ret = 0;
253 break;
254
255 /* make the child exit. Best I can do is send it a sigkill.
256 * perhaps it should be put in the status that it wants to
257 * exit.
258 */
259 case PTRACE_KILL:
260 ret = 0;
261 if (child->exit_state == EXIT_ZOMBIE) /* already dead */
262 break;
263 child->exit_code = SIGKILL;
264 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
265 ptrace_disable(child);
266 wake_up_process(child);
267 break;
268
269 case PTRACE_SINGLESTEP: /* set the trap flag. */
270 ret = -EIO;
271 if (!valid_signal(data))
272 break;
273 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
274 ptrace_enable(child);
275 child->exit_code = data;
276 wake_up_process(child);
277 ret = 0;
278 break;
279
280 case PTRACE_DETACH: /* detach a process that was attached. */
281 ret = ptrace_detach(child, data);
282 break;
283
284 case PTRACE_GETREGS: { /* Get all integer regs from the child. */
285 int i;
286 for (i = 0; i < PT__GPEND; i++) {
287 tmp = get_reg(child, i);
288 if (put_user(tmp, (unsigned long *) data)) {
289 ret = -EFAULT;
290 break;
291 }
292 data += sizeof(long);
293 }
294 ret = 0;
295 break;
296 }
297
298 case PTRACE_SETREGS: { /* Set all integer regs in the child. */
299 int i;
300 for (i = 0; i < PT__GPEND; i++) {
301 if (get_user(tmp, (unsigned long *) data)) {
302 ret = -EFAULT;
303 break;
304 }
305 put_reg(child, i, tmp);
306 data += sizeof(long);
307 }
308 ret = 0;
309 break;
310 }
311
312 case PTRACE_GETFPREGS: { /* Get the child FP/Media state. */
313 ret = 0;
314 if (copy_to_user((void *) data,
315 &child->thread.user->f,
316 sizeof(child->thread.user->f)))
317 ret = -EFAULT;
318 break;
319 }
320
321 case PTRACE_SETFPREGS: { /* Set the child FP/Media state. */
322 ret = 0;
323 if (copy_from_user(&child->thread.user->f,
324 (void *) data,
325 sizeof(child->thread.user->f)))
326 ret = -EFAULT;
327 break;
328 }
329
330 case PTRACE_GETFDPIC:
331 tmp = 0;
332 switch (addr) {
333 case PTRACE_GETFDPIC_EXEC:
334 tmp = child->mm->context.exec_fdpic_loadmap;
335 break;
336 case PTRACE_GETFDPIC_INTERP:
337 tmp = child->mm->context.interp_fdpic_loadmap;
338 break;
339 default:
340 break;
341 }
342
343 ret = 0;
344 if (put_user(tmp, (unsigned long *) data)) {
345 ret = -EFAULT;
346 break;
347 }
348 break;
349
350 default:
351 ret = -EIO;
352 break;
353 }
354 out_tsk:
355 put_task_struct(child);
356 out:
357 unlock_kernel();
358 return ret;
359 }
360
361 int __nongprelbss kstrace;
362
363 static const struct {
364 const char *name;
365 unsigned argmask;
366 } __syscall_name_table[NR_syscalls] = {
367 [0] = { "restart_syscall" },
368 [1] = { "exit", 0x000001 },
369 [2] = { "fork", 0xffffff },
370 [3] = { "read", 0x000141 },
371 [4] = { "write", 0x000141 },
372 [5] = { "open", 0x000235 },
373 [6] = { "close", 0x000001 },
374 [7] = { "waitpid", 0x000141 },
375 [8] = { "creat", 0x000025 },
376 [9] = { "link", 0x000055 },
377 [10] = { "unlink", 0x000005 },
378 [11] = { "execve", 0x000445 },
379 [12] = { "chdir", 0x000005 },
380 [13] = { "time", 0x000004 },
381 [14] = { "mknod", 0x000325 },
382 [15] = { "chmod", 0x000025 },
383 [16] = { "lchown", 0x000025 },
384 [17] = { "break" },
385 [18] = { "oldstat", 0x000045 },
386 [19] = { "lseek", 0x000131 },
387 [20] = { "getpid", 0xffffff },
388 [21] = { "mount", 0x043555 },
389 [22] = { "umount", 0x000005 },
390 [23] = { "setuid", 0x000001 },
391 [24] = { "getuid", 0xffffff },
392 [25] = { "stime", 0x000004 },
393 [26] = { "ptrace", 0x004413 },
394 [27] = { "alarm", 0x000001 },
395 [28] = { "oldfstat", 0x000041 },
396 [29] = { "pause", 0xffffff },
397 [30] = { "utime", 0x000045 },
398 [31] = { "stty" },
399 [32] = { "gtty" },
400 [33] = { "access", 0x000025 },
401 [34] = { "nice", 0x000001 },
402 [35] = { "ftime" },
403 [36] = { "sync", 0xffffff },
404 [37] = { "kill", 0x000011 },
405 [38] = { "rename", 0x000055 },
406 [39] = { "mkdir", 0x000025 },
407 [40] = { "rmdir", 0x000005 },
408 [41] = { "dup", 0x000001 },
409 [42] = { "pipe", 0x000004 },
410 [43] = { "times", 0x000004 },
411 [44] = { "prof" },
412 [45] = { "brk", 0x000004 },
413 [46] = { "setgid", 0x000001 },
414 [47] = { "getgid", 0xffffff },
415 [48] = { "signal", 0x000041 },
416 [49] = { "geteuid", 0xffffff },
417 [50] = { "getegid", 0xffffff },
418 [51] = { "acct", 0x000005 },
419 [52] = { "umount2", 0x000035 },
420 [53] = { "lock" },
421 [54] = { "ioctl", 0x000331 },
422 [55] = { "fcntl", 0x000331 },
423 [56] = { "mpx" },
424 [57] = { "setpgid", 0x000011 },
425 [58] = { "ulimit" },
426 [60] = { "umask", 0x000002 },
427 [61] = { "chroot", 0x000005 },
428 [62] = { "ustat", 0x000043 },
429 [63] = { "dup2", 0x000011 },
430 [64] = { "getppid", 0xffffff },
431 [65] = { "getpgrp", 0xffffff },
432 [66] = { "setsid", 0xffffff },
433 [67] = { "sigaction" },
434 [68] = { "sgetmask" },
435 [69] = { "ssetmask" },
436 [70] = { "setreuid" },
437 [71] = { "setregid" },
438 [72] = { "sigsuspend" },
439 [73] = { "sigpending" },
440 [74] = { "sethostname" },
441 [75] = { "setrlimit" },
442 [76] = { "getrlimit" },
443 [77] = { "getrusage" },
444 [78] = { "gettimeofday" },
445 [79] = { "settimeofday" },
446 [80] = { "getgroups" },
447 [81] = { "setgroups" },
448 [82] = { "select" },
449 [83] = { "symlink" },
450 [84] = { "oldlstat" },
451 [85] = { "readlink" },
452 [86] = { "uselib" },
453 [87] = { "swapon" },
454 [88] = { "reboot" },
455 [89] = { "readdir" },
456 [91] = { "munmap", 0x000034 },
457 [92] = { "truncate" },
458 [93] = { "ftruncate" },
459 [94] = { "fchmod" },
460 [95] = { "fchown" },
461 [96] = { "getpriority" },
462 [97] = { "setpriority" },
463 [99] = { "statfs" },
464 [100] = { "fstatfs" },
465 [102] = { "socketcall" },
466 [103] = { "syslog" },
467 [104] = { "setitimer" },
468 [105] = { "getitimer" },
469 [106] = { "stat" },
470 [107] = { "lstat" },
471 [108] = { "fstat" },
472 [111] = { "vhangup" },
473 [114] = { "wait4" },
474 [115] = { "swapoff" },
475 [116] = { "sysinfo" },
476 [117] = { "ipc" },
477 [118] = { "fsync" },
478 [119] = { "sigreturn" },
479 [120] = { "clone" },
480 [121] = { "setdomainname" },
481 [122] = { "uname" },
482 [123] = { "modify_ldt" },
483 [123] = { "cacheflush" },
484 [124] = { "adjtimex" },
485 [125] = { "mprotect" },
486 [126] = { "sigprocmask" },
487 [127] = { "create_module" },
488 [128] = { "init_module" },
489 [129] = { "delete_module" },
490 [130] = { "get_kernel_syms" },
491 [131] = { "quotactl" },
492 [132] = { "getpgid" },
493 [133] = { "fchdir" },
494 [134] = { "bdflush" },
495 [135] = { "sysfs" },
496 [136] = { "personality" },
497 [137] = { "afs_syscall" },
498 [138] = { "setfsuid" },
499 [139] = { "setfsgid" },
500 [140] = { "_llseek", 0x014331 },
501 [141] = { "getdents" },
502 [142] = { "_newselect", 0x000141 },
503 [143] = { "flock" },
504 [144] = { "msync" },
505 [145] = { "readv" },
506 [146] = { "writev" },
507 [147] = { "getsid", 0x000001 },
508 [148] = { "fdatasync", 0x000001 },
509 [149] = { "_sysctl", 0x000004 },
510 [150] = { "mlock" },
511 [151] = { "munlock" },
512 [152] = { "mlockall" },
513 [153] = { "munlockall" },
514 [154] = { "sched_setparam" },
515 [155] = { "sched_getparam" },
516 [156] = { "sched_setscheduler" },
517 [157] = { "sched_getscheduler" },
518 [158] = { "sched_yield" },
519 [159] = { "sched_get_priority_max" },
520 [160] = { "sched_get_priority_min" },
521 [161] = { "sched_rr_get_interval" },
522 [162] = { "nanosleep", 0x000044 },
523 [163] = { "mremap" },
524 [164] = { "setresuid" },
525 [165] = { "getresuid" },
526 [166] = { "vm86" },
527 [167] = { "query_module" },
528 [168] = { "poll" },
529 [169] = { "nfsservctl" },
530 [170] = { "setresgid" },
531 [171] = { "getresgid" },
532 [172] = { "prctl", 0x333331 },
533 [173] = { "rt_sigreturn", 0xffffff },
534 [174] = { "rt_sigaction", 0x001441 },
535 [175] = { "rt_sigprocmask", 0x001441 },
536 [176] = { "rt_sigpending", 0x000014 },
537 [177] = { "rt_sigtimedwait", 0x001444 },
538 [178] = { "rt_sigqueueinfo", 0x000411 },
539 [179] = { "rt_sigsuspend", 0x000014 },
540 [180] = { "pread", 0x003341 },
541 [181] = { "pwrite", 0x003341 },
542 [182] = { "chown", 0x000115 },
543 [183] = { "getcwd" },
544 [184] = { "capget" },
545 [185] = { "capset" },
546 [186] = { "sigaltstack" },
547 [187] = { "sendfile" },
548 [188] = { "getpmsg" },
549 [189] = { "putpmsg" },
550 [190] = { "vfork", 0xffffff },
551 [191] = { "ugetrlimit" },
552 [192] = { "mmap2", 0x313314 },
553 [193] = { "truncate64" },
554 [194] = { "ftruncate64" },
555 [195] = { "stat64", 0x000045 },
556 [196] = { "lstat64", 0x000045 },
557 [197] = { "fstat64", 0x000041 },
558 [198] = { "lchown32" },
559 [199] = { "getuid32", 0xffffff },
560 [200] = { "getgid32", 0xffffff },
561 [201] = { "geteuid32", 0xffffff },
562 [202] = { "getegid32", 0xffffff },
563 [203] = { "setreuid32" },
564 [204] = { "setregid32" },
565 [205] = { "getgroups32" },
566 [206] = { "setgroups32" },
567 [207] = { "fchown32" },
568 [208] = { "setresuid32" },
569 [209] = { "getresuid32" },
570 [210] = { "setresgid32" },
571 [211] = { "getresgid32" },
572 [212] = { "chown32" },
573 [213] = { "setuid32" },
574 [214] = { "setgid32" },
575 [215] = { "setfsuid32" },
576 [216] = { "setfsgid32" },
577 [217] = { "pivot_root" },
578 [218] = { "mincore" },
579 [219] = { "madvise" },
580 [220] = { "getdents64" },
581 [221] = { "fcntl64" },
582 [223] = { "security" },
583 [224] = { "gettid" },
584 [225] = { "readahead" },
585 [226] = { "setxattr" },
586 [227] = { "lsetxattr" },
587 [228] = { "fsetxattr" },
588 [229] = { "getxattr" },
589 [230] = { "lgetxattr" },
590 [231] = { "fgetxattr" },
591 [232] = { "listxattr" },
592 [233] = { "llistxattr" },
593 [234] = { "flistxattr" },
594 [235] = { "removexattr" },
595 [236] = { "lremovexattr" },
596 [237] = { "fremovexattr" },
597 [238] = { "tkill" },
598 [239] = { "sendfile64" },
599 [240] = { "futex" },
600 [241] = { "sched_setaffinity" },
601 [242] = { "sched_getaffinity" },
602 [243] = { "set_thread_area" },
603 [244] = { "get_thread_area" },
604 [245] = { "io_setup" },
605 [246] = { "io_destroy" },
606 [247] = { "io_getevents" },
607 [248] = { "io_submit" },
608 [249] = { "io_cancel" },
609 [250] = { "fadvise64" },
610 [252] = { "exit_group", 0x000001 },
611 [253] = { "lookup_dcookie" },
612 [254] = { "epoll_create" },
613 [255] = { "epoll_ctl" },
614 [256] = { "epoll_wait" },
615 [257] = { "remap_file_pages" },
616 [258] = { "set_tid_address" },
617 [259] = { "timer_create" },
618 [260] = { "timer_settime" },
619 [261] = { "timer_gettime" },
620 [262] = { "timer_getoverrun" },
621 [263] = { "timer_delete" },
622 [264] = { "clock_settime" },
623 [265] = { "clock_gettime" },
624 [266] = { "clock_getres" },
625 [267] = { "clock_nanosleep" },
626 [268] = { "statfs64" },
627 [269] = { "fstatfs64" },
628 [270] = { "tgkill" },
629 [271] = { "utimes" },
630 [272] = { "fadvise64_64" },
631 [273] = { "vserver" },
632 [274] = { "mbind" },
633 [275] = { "get_mempolicy" },
634 [276] = { "set_mempolicy" },
635 [277] = { "mq_open" },
636 [278] = { "mq_unlink" },
637 [279] = { "mq_timedsend" },
638 [280] = { "mq_timedreceive" },
639 [281] = { "mq_notify" },
640 [282] = { "mq_getsetattr" },
641 [283] = { "sys_kexec_load" },
642 };
643
644 asmlinkage void do_syscall_trace(int leaving)
645 {
646 #if 0
647 unsigned long *argp;
648 const char *name;
649 unsigned argmask;
650 char buffer[16];
651
652 if (!kstrace)
653 return;
654
655 if (!current->mm)
656 return;
657
658 if (__frame->gr7 == __NR_close)
659 return;
660
661 #if 0
662 if (__frame->gr7 != __NR_mmap2 &&
663 __frame->gr7 != __NR_vfork &&
664 __frame->gr7 != __NR_execve &&
665 __frame->gr7 != __NR_exit)
666 return;
667 #endif
668
669 argmask = 0;
670 name = NULL;
671 if (__frame->gr7 < NR_syscalls) {
672 name = __syscall_name_table[__frame->gr7].name;
673 argmask = __syscall_name_table[__frame->gr7].argmask;
674 }
675 if (!name) {
676 sprintf(buffer, "sys_%lx", __frame->gr7);
677 name = buffer;
678 }
679
680 if (!leaving) {
681 if (!argmask) {
682 printk(KERN_CRIT "[%d] %s(%lx,%lx,%lx,%lx,%lx,%lx)\n",
683 current->pid,
684 name,
685 __frame->gr8,
686 __frame->gr9,
687 __frame->gr10,
688 __frame->gr11,
689 __frame->gr12,
690 __frame->gr13);
691 }
692 else if (argmask == 0xffffff) {
693 printk(KERN_CRIT "[%d] %s()\n",
694 current->pid,
695 name);
696 }
697 else {
698 printk(KERN_CRIT "[%d] %s(",
699 current->pid,
700 name);
701
702 argp = &__frame->gr8;
703
704 do {
705 switch (argmask & 0xf) {
706 case 1:
707 printk("%ld", (long) *argp);
708 break;
709 case 2:
710 printk("%lo", *argp);
711 break;
712 case 3:
713 printk("%lx", *argp);
714 break;
715 case 4:
716 printk("%p", (void *) *argp);
717 break;
718 case 5:
719 printk("\"%s\"", (char *) *argp);
720 break;
721 }
722
723 argp++;
724 argmask >>= 4;
725 if (argmask)
726 printk(",");
727
728 } while (argmask);
729
730 printk(")\n");
731 }
732 }
733 else {
734 if ((int)__frame->gr8 > -4096 && (int)__frame->gr8 < 4096)
735 printk(KERN_CRIT "[%d] %s() = %ld\n", current->pid, name, __frame->gr8);
736 else
737 printk(KERN_CRIT "[%d] %s() = %lx\n", current->pid, name, __frame->gr8);
738 }
739 return;
740 #endif
741
742 if (!test_thread_flag(TIF_SYSCALL_TRACE))
743 return;
744
745 if (!(current->ptrace & PT_PTRACED))
746 return;
747
748 /* we need to indicate entry or exit to strace */
749 if (leaving)
750 __frame->__status |= REG__STATUS_SYSC_EXIT;
751 else
752 __frame->__status |= REG__STATUS_SYSC_ENTRY;
753
754 ptrace_notify(SIGTRAP);
755
756 /*
757 * this isn't the same as continuing with a signal, but it will do
758 * for normal use. strace only continues with a signal if the
759 * stopping signal is not SIGTRAP. -brl
760 */
761 if (current->exit_code) {
762 send_sig(current->exit_code, current, 1);
763 current->exit_code = 0;
764 }
765 }
linux-next