?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[IPV4]: Correct rp_filter help text.
[linux-2.6/verdex.git] / arch / frv / kernel / ptrace.c
blobce88fb95ee59e5ce213d3c4a660e27e3fe9b4cbf
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/errno.h>
18 #include <linux/ptrace.h>
19 #include <linux/user.h>
20 #include <linux/security.h>
21 #include <linux/signal.h>
22
23 #include <asm/uaccess.h>
24 #include <asm/page.h>
25 #include <asm/pgtable.h>
26 #include <asm/system.h>
27 #include <asm/processor.h>
28 #include <asm/unistd.h>
29
30 /*
31 * does not yet catch signals sent when the child dies.
32 * in exit.c or in signal.c.
33 */
34
35 /*
36 * Get contents of register REGNO in task TASK.
37 */
38 static inline long get_reg(struct task_struct *task, int regno)
39 {
40 struct user_context *user = task->thread.user;
41
42 if (regno < 0 || regno >= PT__END)
43 return 0;
44
45 return ((unsigned long *) user)[regno];
46 }
47
48 /*
49 * Write contents of register REGNO in task TASK.
50 */
51 static inline int put_reg(struct task_struct *task, int regno,
52 unsigned long data)
53 {
54 struct user_context *user = task->thread.user;
55
56 if (regno < 0 || regno >= PT__END)
57 return -EIO;
58
59 switch (regno) {
60 case PT_GR(0):
61 return 0;
62 case PT_PSR:
63 case PT__STATUS:
64 return -EIO;
65 default:
66 ((unsigned long *) user)[regno] = data;
67 return 0;
68 }
69 }
70
71 /*
72 * check that an address falls within the bounds of the target process's memory mappings
73 */
74 static inline int is_user_addr_valid(struct task_struct *child,
75 unsigned long start, unsigned long len)
76 {
77 #ifdef CONFIG_MMU
78 if (start >= PAGE_OFFSET || len > PAGE_OFFSET - start)
79 return -EIO;
80 return 0;
81 #else
82 struct vm_list_struct *vml;
83
84 for (vml = child->mm->context.vmlist; vml; vml = vml->next)
85 if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end)
86 return 0;
87
88 return -EIO;
89 #endif
90 }
91
92 /*
93 * Called by kernel/ptrace.c when detaching..
94 *
95 * Control h/w single stepping
96 */
97 void ptrace_disable(struct task_struct *child)
98 {
99 child->thread.frame0->__status &= ~REG__STATUS_STEP;
100 }
101
102 void ptrace_enable(struct task_struct *child)
103 {
104 child->thread.frame0->__status |= REG__STATUS_STEP;
105 }
106
107 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
108 {
109 unsigned long tmp;
110 int ret;
111
112 switch (request) {
113 /* when I and D space are separate, these will need to be fixed. */
114 case PTRACE_PEEKTEXT: /* read word at location addr. */
115 case PTRACE_PEEKDATA: {
116 int copied;
117
118 ret = -EIO;
119 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
120 break;
121
122 copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
123 if (copied != sizeof(tmp))
124 break;
125
126 ret = put_user(tmp,(unsigned long *) data);
127 break;
128 }
129
130 /* read the word at location addr in the USER area. */
131 case PTRACE_PEEKUSR: {
132 tmp = 0;
133 ret = -EIO;
134 if ((addr & 3) || addr < 0)
135 break;
136
137 ret = 0;
138 switch (addr >> 2) {
139 case 0 ... PT__END - 1:
140 tmp = get_reg(child, addr >> 2);
141 break;
142
143 case PT__END + 0:
144 tmp = child->mm->end_code - child->mm->start_code;
145 break;
146
147 case PT__END + 1:
148 tmp = child->mm->end_data - child->mm->start_data;
149 break;
150
151 case PT__END + 2:
152 tmp = child->mm->start_stack - child->mm->start_brk;
153 break;
154
155 case PT__END + 3:
156 tmp = child->mm->start_code;
157 break;
158
159 case PT__END + 4:
160 tmp = child->mm->start_stack;
161 break;
162
163 default:
164 ret = -EIO;
165 break;
166 }
167
168 if (ret == 0)
169 ret = put_user(tmp, (unsigned long *) data);
170 break;
171 }
172
173 /* when I and D space are separate, this will have to be fixed. */
174 case PTRACE_POKETEXT: /* write the word at location addr. */
175 case PTRACE_POKEDATA:
176 ret = -EIO;
177 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
178 break;
179 if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
180 break;
181 ret = 0;
182 break;
183
184 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
185 ret = -EIO;
186 if ((addr & 3) || addr < 0)
187 break;
188
189 ret = 0;
190 switch (addr >> 2) {
191 case 0 ... PT__END-1:
192 ret = put_reg(child, addr >> 2, data);
193 break;
194
195 default:
196 ret = -EIO;
197 break;
198 }
199 break;
200
201 case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
202 case PTRACE_CONT: /* restart after signal. */
203 ret = -EIO;
204 if (!valid_signal(data))
205 break;
206 if (request == PTRACE_SYSCALL)
207 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
208 else
209 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
210 child->exit_code = data;
211 ptrace_disable(child);
212 wake_up_process(child);
213 ret = 0;
214 break;
215
216 /* make the child exit. Best I can do is send it a sigkill.
217 * perhaps it should be put in the status that it wants to
218 * exit.
219 */
220 case PTRACE_KILL:
221 ret = 0;
222 if (child->exit_state == EXIT_ZOMBIE) /* already dead */
223 break;
224 child->exit_code = SIGKILL;
225 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
226 ptrace_disable(child);
227 wake_up_process(child);
228 break;
229
230 case PTRACE_SINGLESTEP: /* set the trap flag. */
231 ret = -EIO;
232 if (!valid_signal(data))
233 break;
234 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
235 ptrace_enable(child);
236 child->exit_code = data;
237 wake_up_process(child);
238 ret = 0;
239 break;
240
241 case PTRACE_DETACH: /* detach a process that was attached. */
242 ret = ptrace_detach(child, data);
243 break;
244
245 case PTRACE_GETREGS: { /* Get all integer regs from the child. */
246 int i;
247 for (i = 0; i < PT__GPEND; i++) {
248 tmp = get_reg(child, i);
249 if (put_user(tmp, (unsigned long *) data)) {
250 ret = -EFAULT;
251 break;
252 }
253 data += sizeof(long);
254 }
255 ret = 0;
256 break;
257 }
258
259 case PTRACE_SETREGS: { /* Set all integer regs in the child. */
260 int i;
261 for (i = 0; i < PT__GPEND; i++) {
262 if (get_user(tmp, (unsigned long *) data)) {
263 ret = -EFAULT;
264 break;
265 }
266 put_reg(child, i, tmp);
267 data += sizeof(long);
268 }
269 ret = 0;
270 break;
271 }
272
273 case PTRACE_GETFPREGS: { /* Get the child FP/Media state. */
274 ret = 0;
275 if (copy_to_user((void *) data,
276 &child->thread.user->f,
277 sizeof(child->thread.user->f)))
278 ret = -EFAULT;
279 break;
280 }
281
282 case PTRACE_SETFPREGS: { /* Set the child FP/Media state. */
283 ret = 0;
284 if (copy_from_user(&child->thread.user->f,
285 (void *) data,
286 sizeof(child->thread.user->f)))
287 ret = -EFAULT;
288 break;
289 }
290
291 case PTRACE_GETFDPIC:
292 tmp = 0;
293 switch (addr) {
294 case PTRACE_GETFDPIC_EXEC:
295 tmp = child->mm->context.exec_fdpic_loadmap;
296 break;
297 case PTRACE_GETFDPIC_INTERP:
298 tmp = child->mm->context.interp_fdpic_loadmap;
299 break;
300 default:
301 break;
302 }
303
304 ret = 0;
305 if (put_user(tmp, (unsigned long *) data)) {
306 ret = -EFAULT;
307 break;
308 }
309 break;
310
311 default:
312 ret = -EIO;
313 break;
314 }
315 return ret;
316 }
317
318 int __nongprelbss kstrace;
319
320 static const struct {
321 const char *name;
322 unsigned argmask;
323 } __syscall_name_table[NR_syscalls] = {
324 [0] = { "restart_syscall" },
325 [1] = { "exit", 0x000001 },
326 [2] = { "fork", 0xffffff },
327 [3] = { "read", 0x000141 },
328 [4] = { "write", 0x000141 },
329 [5] = { "open", 0x000235 },
330 [6] = { "close", 0x000001 },
331 [7] = { "waitpid", 0x000141 },
332 [8] = { "creat", 0x000025 },
333 [9] = { "link", 0x000055 },
334 [10] = { "unlink", 0x000005 },
335 [11] = { "execve", 0x000445 },
336 [12] = { "chdir", 0x000005 },
337 [13] = { "time", 0x000004 },
338 [14] = { "mknod", 0x000325 },
339 [15] = { "chmod", 0x000025 },
340 [16] = { "lchown", 0x000025 },
341 [17] = { "break" },
342 [18] = { "oldstat", 0x000045 },
343 [19] = { "lseek", 0x000131 },
344 [20] = { "getpid", 0xffffff },
345 [21] = { "mount", 0x043555 },
346 [22] = { "umount", 0x000005 },
347 [23] = { "setuid", 0x000001 },
348 [24] = { "getuid", 0xffffff },
349 [25] = { "stime", 0x000004 },
350 [26] = { "ptrace", 0x004413 },
351 [27] = { "alarm", 0x000001 },
352 [28] = { "oldfstat", 0x000041 },
353 [29] = { "pause", 0xffffff },
354 [30] = { "utime", 0x000045 },
355 [31] = { "stty" },
356 [32] = { "gtty" },
357 [33] = { "access", 0x000025 },
358 [34] = { "nice", 0x000001 },
359 [35] = { "ftime" },
360 [36] = { "sync", 0xffffff },
361 [37] = { "kill", 0x000011 },
362 [38] = { "rename", 0x000055 },
363 [39] = { "mkdir", 0x000025 },
364 [40] = { "rmdir", 0x000005 },
365 [41] = { "dup", 0x000001 },
366 [42] = { "pipe", 0x000004 },
367 [43] = { "times", 0x000004 },
368 [44] = { "prof" },
369 [45] = { "brk", 0x000004 },
370 [46] = { "setgid", 0x000001 },
371 [47] = { "getgid", 0xffffff },
372 [48] = { "signal", 0x000041 },
373 [49] = { "geteuid", 0xffffff },
374 [50] = { "getegid", 0xffffff },
375 [51] = { "acct", 0x000005 },
376 [52] = { "umount2", 0x000035 },
377 [53] = { "lock" },
378 [54] = { "ioctl", 0x000331 },
379 [55] = { "fcntl", 0x000331 },
380 [56] = { "mpx" },
381 [57] = { "setpgid", 0x000011 },
382 [58] = { "ulimit" },
383 [60] = { "umask", 0x000002 },
384 [61] = { "chroot", 0x000005 },
385 [62] = { "ustat", 0x000043 },
386 [63] = { "dup2", 0x000011 },
387 [64] = { "getppid", 0xffffff },
388 [65] = { "getpgrp", 0xffffff },
389 [66] = { "setsid", 0xffffff },
390 [67] = { "sigaction" },
391 [68] = { "sgetmask" },
392 [69] = { "ssetmask" },
393 [70] = { "setreuid" },
394 [71] = { "setregid" },
395 [72] = { "sigsuspend" },
396 [73] = { "sigpending" },
397 [74] = { "sethostname" },
398 [75] = { "setrlimit" },
399 [76] = { "getrlimit" },
400 [77] = { "getrusage" },
401 [78] = { "gettimeofday" },
402 [79] = { "settimeofday" },
403 [80] = { "getgroups" },
404 [81] = { "setgroups" },
405 [82] = { "select" },
406 [83] = { "symlink" },
407 [84] = { "oldlstat" },
408 [85] = { "readlink" },
409 [86] = { "uselib" },
410 [87] = { "swapon" },
411 [88] = { "reboot" },
412 [89] = { "readdir" },
413 [91] = { "munmap", 0x000034 },
414 [92] = { "truncate" },
415 [93] = { "ftruncate" },
416 [94] = { "fchmod" },
417 [95] = { "fchown" },
418 [96] = { "getpriority" },
419 [97] = { "setpriority" },
420 [99] = { "statfs" },
421 [100] = { "fstatfs" },
422 [102] = { "socketcall" },
423 [103] = { "syslog" },
424 [104] = { "setitimer" },
425 [105] = { "getitimer" },
426 [106] = { "stat" },
427 [107] = { "lstat" },
428 [108] = { "fstat" },
429 [111] = { "vhangup" },
430 [114] = { "wait4" },
431 [115] = { "swapoff" },
432 [116] = { "sysinfo" },
433 [117] = { "ipc" },
434 [118] = { "fsync" },
435 [119] = { "sigreturn" },
436 [120] = { "clone" },
437 [121] = { "setdomainname" },
438 [122] = { "uname" },
439 [123] = { "modify_ldt" },
440 [123] = { "cacheflush" },
441 [124] = { "adjtimex" },
442 [125] = { "mprotect" },
443 [126] = { "sigprocmask" },
444 [127] = { "create_module" },
445 [128] = { "init_module" },
446 [129] = { "delete_module" },
447 [130] = { "get_kernel_syms" },
448 [131] = { "quotactl" },
449 [132] = { "getpgid" },
450 [133] = { "fchdir" },
451 [134] = { "bdflush" },
452 [135] = { "sysfs" },
453 [136] = { "personality" },
454 [137] = { "afs_syscall" },
455 [138] = { "setfsuid" },
456 [139] = { "setfsgid" },
457 [140] = { "_llseek", 0x014331 },
458 [141] = { "getdents" },
459 [142] = { "_newselect", 0x000141 },
460 [143] = { "flock" },
461 [144] = { "msync" },
462 [145] = { "readv" },
463 [146] = { "writev" },
464 [147] = { "getsid", 0x000001 },
465 [148] = { "fdatasync", 0x000001 },
466 [149] = { "_sysctl", 0x000004 },
467 [150] = { "mlock" },
468 [151] = { "munlock" },
469 [152] = { "mlockall" },
470 [153] = { "munlockall" },
471 [154] = { "sched_setparam" },
472 [155] = { "sched_getparam" },
473 [156] = { "sched_setscheduler" },
474 [157] = { "sched_getscheduler" },
475 [158] = { "sched_yield" },
476 [159] = { "sched_get_priority_max" },
477 [160] = { "sched_get_priority_min" },
478 [161] = { "sched_rr_get_interval" },
479 [162] = { "nanosleep", 0x000044 },
480 [163] = { "mremap" },
481 [164] = { "setresuid" },
482 [165] = { "getresuid" },
483 [166] = { "vm86" },
484 [167] = { "query_module" },
485 [168] = { "poll" },
486 [169] = { "nfsservctl" },
487 [170] = { "setresgid" },
488 [171] = { "getresgid" },
489 [172] = { "prctl", 0x333331 },
490 [173] = { "rt_sigreturn", 0xffffff },
491 [174] = { "rt_sigaction", 0x001441 },
492 [175] = { "rt_sigprocmask", 0x001441 },
493 [176] = { "rt_sigpending", 0x000014 },
494 [177] = { "rt_sigtimedwait", 0x001444 },
495 [178] = { "rt_sigqueueinfo", 0x000411 },
496 [179] = { "rt_sigsuspend", 0x000014 },
497 [180] = { "pread", 0x003341 },
498 [181] = { "pwrite", 0x003341 },
499 [182] = { "chown", 0x000115 },
500 [183] = { "getcwd" },
501 [184] = { "capget" },
502 [185] = { "capset" },
503 [186] = { "sigaltstack" },
504 [187] = { "sendfile" },
505 [188] = { "getpmsg" },
506 [189] = { "putpmsg" },
507 [190] = { "vfork", 0xffffff },
508 [191] = { "ugetrlimit" },
509 [192] = { "mmap2", 0x313314 },
510 [193] = { "truncate64" },
511 [194] = { "ftruncate64" },
512 [195] = { "stat64", 0x000045 },
513 [196] = { "lstat64", 0x000045 },
514 [197] = { "fstat64", 0x000041 },
515 [198] = { "lchown32" },
516 [199] = { "getuid32", 0xffffff },
517 [200] = { "getgid32", 0xffffff },
518 [201] = { "geteuid32", 0xffffff },
519 [202] = { "getegid32", 0xffffff },
520 [203] = { "setreuid32" },
521 [204] = { "setregid32" },
522 [205] = { "getgroups32" },
523 [206] = { "setgroups32" },
524 [207] = { "fchown32" },
525 [208] = { "setresuid32" },
526 [209] = { "getresuid32" },
527 [210] = { "setresgid32" },
528 [211] = { "getresgid32" },
529 [212] = { "chown32" },
530 [213] = { "setuid32" },
531 [214] = { "setgid32" },
532 [215] = { "setfsuid32" },
533 [216] = { "setfsgid32" },
534 [217] = { "pivot_root" },
535 [218] = { "mincore" },
536 [219] = { "madvise" },
537 [220] = { "getdents64" },
538 [221] = { "fcntl64" },
539 [223] = { "security" },
540 [224] = { "gettid" },
541 [225] = { "readahead" },
542 [226] = { "setxattr" },
543 [227] = { "lsetxattr" },
544 [228] = { "fsetxattr" },
545 [229] = { "getxattr" },
546 [230] = { "lgetxattr" },
547 [231] = { "fgetxattr" },
548 [232] = { "listxattr" },
549 [233] = { "llistxattr" },
550 [234] = { "flistxattr" },
551 [235] = { "removexattr" },
552 [236] = { "lremovexattr" },
553 [237] = { "fremovexattr" },
554 [238] = { "tkill" },
555 [239] = { "sendfile64" },
556 [240] = { "futex" },
557 [241] = { "sched_setaffinity" },
558 [242] = { "sched_getaffinity" },
559 [243] = { "set_thread_area" },
560 [244] = { "get_thread_area" },
561 [245] = { "io_setup" },
562 [246] = { "io_destroy" },
563 [247] = { "io_getevents" },
564 [248] = { "io_submit" },
565 [249] = { "io_cancel" },
566 [250] = { "fadvise64" },
567 [252] = { "exit_group", 0x000001 },
568 [253] = { "lookup_dcookie" },
569 [254] = { "epoll_create" },
570 [255] = { "epoll_ctl" },
571 [256] = { "epoll_wait" },
572 [257] = { "remap_file_pages" },
573 [258] = { "set_tid_address" },
574 [259] = { "timer_create" },
575 [260] = { "timer_settime" },
576 [261] = { "timer_gettime" },
577 [262] = { "timer_getoverrun" },
578 [263] = { "timer_delete" },
579 [264] = { "clock_settime" },
580 [265] = { "clock_gettime" },
581 [266] = { "clock_getres" },
582 [267] = { "clock_nanosleep" },
583 [268] = { "statfs64" },
584 [269] = { "fstatfs64" },
585 [270] = { "tgkill" },
586 [271] = { "utimes" },
587 [272] = { "fadvise64_64" },
588 [273] = { "vserver" },
589 [274] = { "mbind" },
590 [275] = { "get_mempolicy" },
591 [276] = { "set_mempolicy" },
592 [277] = { "mq_open" },
593 [278] = { "mq_unlink" },
594 [279] = { "mq_timedsend" },
595 [280] = { "mq_timedreceive" },
596 [281] = { "mq_notify" },
597 [282] = { "mq_getsetattr" },
598 [283] = { "sys_kexec_load" },
599 };
600
601 asmlinkage void do_syscall_trace(int leaving)
602 {
603 #if 0
604 unsigned long *argp;
605 const char *name;
606 unsigned argmask;
607 char buffer[16];
608
609 if (!kstrace)
610 return;
611
612 if (!current->mm)
613 return;
614
615 if (__frame->gr7 == __NR_close)
616 return;
617
618 #if 0
619 if (__frame->gr7 != __NR_mmap2 &&
620 __frame->gr7 != __NR_vfork &&
621 __frame->gr7 != __NR_execve &&
622 __frame->gr7 != __NR_exit)
623 return;
624 #endif
625
626 argmask = 0;
627 name = NULL;
628 if (__frame->gr7 < NR_syscalls) {
629 name = __syscall_name_table[__frame->gr7].name;
630 argmask = __syscall_name_table[__frame->gr7].argmask;
631 }
632 if (!name) {
633 sprintf(buffer, "sys_%lx", __frame->gr7);
634 name = buffer;
635 }
636
637 if (!leaving) {
638 if (!argmask) {
639 printk(KERN_CRIT "[%d] %s(%lx,%lx,%lx,%lx,%lx,%lx)\n",
640 current->pid,
641 name,
642 __frame->gr8,
643 __frame->gr9,
644 __frame->gr10,
645 __frame->gr11,
646 __frame->gr12,
647 __frame->gr13);
648 }
649 else if (argmask == 0xffffff) {
650 printk(KERN_CRIT "[%d] %s()\n",
651 current->pid,
652 name);
653 }
654 else {
655 printk(KERN_CRIT "[%d] %s(",
656 current->pid,
657 name);
658
659 argp = &__frame->gr8;
660
661 do {
662 switch (argmask & 0xf) {
663 case 1:
664 printk("%ld", (long) *argp);
665 break;
666 case 2:
667 printk("%lo", *argp);
668 break;
669 case 3:
670 printk("%lx", *argp);
671 break;
672 case 4:
673 printk("%p", (void *) *argp);
674 break;
675 case 5:
676 printk("\"%s\"", (char *) *argp);
677 break;
678 }
679
680 argp++;
681 argmask >>= 4;
682 if (argmask)
683 printk(",");
684
685 } while (argmask);
686
687 printk(")\n");
688 }
689 }
690 else {
691 if ((int)__frame->gr8 > -4096 && (int)__frame->gr8 < 4096)
692 printk(KERN_CRIT "[%d] %s() = %ld\n", current->pid, name, __frame->gr8);
693 else
694 printk(KERN_CRIT "[%d] %s() = %lx\n", current->pid, name, __frame->gr8);
695 }
696 return;
697 #endif
698
699 if (!test_thread_flag(TIF_SYSCALL_TRACE))
700 return;
701
702 if (!(current->ptrace & PT_PTRACED))
703 return;
704
705 /* we need to indicate entry or exit to strace */
706 if (leaving)
707 __frame->__status |= REG__STATUS_SYSC_EXIT;
708 else
709 __frame->__status |= REG__STATUS_SYSC_ENTRY;
710
711 ptrace_notify(SIGTRAP);
712
713 /*
714 * this isn't the same as continuing with a signal, but it will do
715 * for normal use. strace only continues with a signal if the
716 * stopping signal is not SIGTRAP. -brl
717 */
718 if (current->exit_code) {
719 send_sig(current->exit_code, current, 1);
720 current->exit_code = 0;
721 }
722 }
Verdex Pro support