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5d5314d6 JW |
1 | /* |
2 | * Kernel Debugger Architecture Independent Main Code | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 1999-2004 Silicon Graphics, Inc. All Rights Reserved. | |
9 | * Copyright (C) 2000 Stephane Eranian <eranian@hpl.hp.com> | |
10 | * Xscale (R) modifications copyright (C) 2003 Intel Corporation. | |
11 | * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved. | |
12 | */ | |
13 | ||
14 | #include <linux/ctype.h> | |
420c2b1b | 15 | #include <linux/types.h> |
5d5314d6 JW |
16 | #include <linux/string.h> |
17 | #include <linux/kernel.h> | |
bc792e61 | 18 | #include <linux/kmsg_dump.h> |
5d5314d6 JW |
19 | #include <linux/reboot.h> |
20 | #include <linux/sched.h> | |
21 | #include <linux/sysrq.h> | |
22 | #include <linux/smp.h> | |
23 | #include <linux/utsname.h> | |
24 | #include <linux/vmalloc.h> | |
ad394f66 | 25 | #include <linux/atomic.h> |
5d5314d6 | 26 | #include <linux/module.h> |
420c2b1b | 27 | #include <linux/moduleparam.h> |
5d5314d6 JW |
28 | #include <linux/mm.h> |
29 | #include <linux/init.h> | |
30 | #include <linux/kallsyms.h> | |
31 | #include <linux/kgdb.h> | |
32 | #include <linux/kdb.h> | |
33 | #include <linux/notifier.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/nmi.h> | |
37 | #include <linux/time.h> | |
38 | #include <linux/ptrace.h> | |
39 | #include <linux/sysctl.h> | |
40 | #include <linux/cpu.h> | |
41 | #include <linux/kdebug.h> | |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/uaccess.h> | |
44 | #include <linux/slab.h> | |
45 | #include "kdb_private.h" | |
46 | ||
420c2b1b AV |
47 | #undef MODULE_PARAM_PREFIX |
48 | #define MODULE_PARAM_PREFIX "kdb." | |
49 | ||
b8017177 | 50 | static int kdb_cmd_enabled = CONFIG_KDB_DEFAULT_ENABLE; |
420c2b1b AV |
51 | module_param_named(cmd_enable, kdb_cmd_enabled, int, 0600); |
52 | ||
5d5314d6 JW |
53 | #define GREP_LEN 256 |
54 | char kdb_grep_string[GREP_LEN]; | |
55 | int kdb_grepping_flag; | |
56 | EXPORT_SYMBOL(kdb_grepping_flag); | |
57 | int kdb_grep_leading; | |
58 | int kdb_grep_trailing; | |
59 | ||
60 | /* | |
61 | * Kernel debugger state flags | |
62 | */ | |
63 | int kdb_flags; | |
64 | atomic_t kdb_event; | |
65 | ||
66 | /* | |
67 | * kdb_lock protects updates to kdb_initial_cpu. Used to | |
68 | * single thread processors through the kernel debugger. | |
69 | */ | |
70 | int kdb_initial_cpu = -1; /* cpu number that owns kdb */ | |
71 | int kdb_nextline = 1; | |
72 | int kdb_state; /* General KDB state */ | |
73 | ||
74 | struct task_struct *kdb_current_task; | |
75 | EXPORT_SYMBOL(kdb_current_task); | |
76 | struct pt_regs *kdb_current_regs; | |
77 | ||
78 | const char *kdb_diemsg; | |
79 | static int kdb_go_count; | |
80 | #ifdef CONFIG_KDB_CONTINUE_CATASTROPHIC | |
81 | static unsigned int kdb_continue_catastrophic = | |
82 | CONFIG_KDB_CONTINUE_CATASTROPHIC; | |
83 | #else | |
84 | static unsigned int kdb_continue_catastrophic; | |
85 | #endif | |
86 | ||
87 | /* kdb_commands describes the available commands. */ | |
88 | static kdbtab_t *kdb_commands; | |
89 | #define KDB_BASE_CMD_MAX 50 | |
90 | static int kdb_max_commands = KDB_BASE_CMD_MAX; | |
27029c33 | 91 | static kdbtab_t kdb_base_commands[KDB_BASE_CMD_MAX]; |
5d5314d6 JW |
92 | #define for_each_kdbcmd(cmd, num) \ |
93 | for ((cmd) = kdb_base_commands, (num) = 0; \ | |
94 | num < kdb_max_commands; \ | |
5450d904 | 95 | num++, num == KDB_BASE_CMD_MAX ? cmd = kdb_commands : cmd++) |
5d5314d6 JW |
96 | |
97 | typedef struct _kdbmsg { | |
98 | int km_diag; /* kdb diagnostic */ | |
99 | char *km_msg; /* Corresponding message text */ | |
100 | } kdbmsg_t; | |
101 | ||
102 | #define KDBMSG(msgnum, text) \ | |
103 | { KDB_##msgnum, text } | |
104 | ||
105 | static kdbmsg_t kdbmsgs[] = { | |
106 | KDBMSG(NOTFOUND, "Command Not Found"), | |
107 | KDBMSG(ARGCOUNT, "Improper argument count, see usage."), | |
108 | KDBMSG(BADWIDTH, "Illegal value for BYTESPERWORD use 1, 2, 4 or 8, " | |
109 | "8 is only allowed on 64 bit systems"), | |
110 | KDBMSG(BADRADIX, "Illegal value for RADIX use 8, 10 or 16"), | |
111 | KDBMSG(NOTENV, "Cannot find environment variable"), | |
112 | KDBMSG(NOENVVALUE, "Environment variable should have value"), | |
113 | KDBMSG(NOTIMP, "Command not implemented"), | |
114 | KDBMSG(ENVFULL, "Environment full"), | |
115 | KDBMSG(ENVBUFFULL, "Environment buffer full"), | |
116 | KDBMSG(TOOMANYBPT, "Too many breakpoints defined"), | |
117 | #ifdef CONFIG_CPU_XSCALE | |
118 | KDBMSG(TOOMANYDBREGS, "More breakpoints than ibcr registers defined"), | |
119 | #else | |
120 | KDBMSG(TOOMANYDBREGS, "More breakpoints than db registers defined"), | |
121 | #endif | |
122 | KDBMSG(DUPBPT, "Duplicate breakpoint address"), | |
123 | KDBMSG(BPTNOTFOUND, "Breakpoint not found"), | |
124 | KDBMSG(BADMODE, "Invalid IDMODE"), | |
125 | KDBMSG(BADINT, "Illegal numeric value"), | |
126 | KDBMSG(INVADDRFMT, "Invalid symbolic address format"), | |
127 | KDBMSG(BADREG, "Invalid register name"), | |
128 | KDBMSG(BADCPUNUM, "Invalid cpu number"), | |
129 | KDBMSG(BADLENGTH, "Invalid length field"), | |
130 | KDBMSG(NOBP, "No Breakpoint exists"), | |
131 | KDBMSG(BADADDR, "Invalid address"), | |
420c2b1b | 132 | KDBMSG(NOPERM, "Permission denied"), |
5d5314d6 JW |
133 | }; |
134 | #undef KDBMSG | |
135 | ||
5f784f79 | 136 | static const int __nkdb_err = ARRAY_SIZE(kdbmsgs); |
5d5314d6 JW |
137 | |
138 | ||
139 | /* | |
140 | * Initial environment. This is all kept static and local to | |
141 | * this file. We don't want to rely on the memory allocation | |
142 | * mechanisms in the kernel, so we use a very limited allocate-only | |
143 | * heap for new and altered environment variables. The entire | |
144 | * environment is limited to a fixed number of entries (add more | |
145 | * to __env[] if required) and a fixed amount of heap (add more to | |
146 | * KDB_ENVBUFSIZE if required). | |
147 | */ | |
148 | ||
149 | static char *__env[] = { | |
150 | #if defined(CONFIG_SMP) | |
151 | "PROMPT=[%d]kdb> ", | |
5d5314d6 JW |
152 | #else |
153 | "PROMPT=kdb> ", | |
5d5314d6 | 154 | #endif |
0f26d0e0 | 155 | "MOREPROMPT=more> ", |
5d5314d6 JW |
156 | "RADIX=16", |
157 | "MDCOUNT=8", /* lines of md output */ | |
5d5314d6 JW |
158 | KDB_PLATFORM_ENV, |
159 | "DTABCOUNT=30", | |
160 | "NOSECT=1", | |
161 | (char *)0, | |
162 | (char *)0, | |
163 | (char *)0, | |
164 | (char *)0, | |
165 | (char *)0, | |
166 | (char *)0, | |
167 | (char *)0, | |
168 | (char *)0, | |
169 | (char *)0, | |
170 | (char *)0, | |
171 | (char *)0, | |
172 | (char *)0, | |
173 | (char *)0, | |
174 | (char *)0, | |
3bdb65ec | 175 | (char *)0, |
5d5314d6 JW |
176 | (char *)0, |
177 | (char *)0, | |
178 | (char *)0, | |
179 | (char *)0, | |
180 | (char *)0, | |
181 | (char *)0, | |
182 | (char *)0, | |
183 | (char *)0, | |
184 | (char *)0, | |
185 | }; | |
186 | ||
5f784f79 | 187 | static const int __nenv = ARRAY_SIZE(__env); |
5d5314d6 JW |
188 | |
189 | struct task_struct *kdb_curr_task(int cpu) | |
190 | { | |
191 | struct task_struct *p = curr_task(cpu); | |
192 | #ifdef _TIF_MCA_INIT | |
193 | if ((task_thread_info(p)->flags & _TIF_MCA_INIT) && KDB_TSK(cpu)) | |
194 | p = krp->p; | |
195 | #endif | |
196 | return p; | |
197 | } | |
198 | ||
9452e977 DT |
199 | /* |
200 | * Check whether the flags of the current command and the permissions | |
201 | * of the kdb console has allow a command to be run. | |
202 | */ | |
203 | static inline bool kdb_check_flags(kdb_cmdflags_t flags, int permissions, | |
204 | bool no_args) | |
205 | { | |
206 | /* permissions comes from userspace so needs massaging slightly */ | |
207 | permissions &= KDB_ENABLE_MASK; | |
208 | permissions |= KDB_ENABLE_ALWAYS_SAFE; | |
209 | ||
210 | /* some commands change group when launched with no arguments */ | |
211 | if (no_args) | |
212 | permissions |= permissions << KDB_ENABLE_NO_ARGS_SHIFT; | |
213 | ||
214 | flags |= KDB_ENABLE_ALL; | |
215 | ||
216 | return permissions & flags; | |
217 | } | |
218 | ||
5d5314d6 JW |
219 | /* |
220 | * kdbgetenv - This function will return the character string value of | |
221 | * an environment variable. | |
222 | * Parameters: | |
223 | * match A character string representing an environment variable. | |
224 | * Returns: | |
225 | * NULL No environment variable matches 'match' | |
226 | * char* Pointer to string value of environment variable. | |
227 | */ | |
228 | char *kdbgetenv(const char *match) | |
229 | { | |
230 | char **ep = __env; | |
231 | int matchlen = strlen(match); | |
232 | int i; | |
233 | ||
234 | for (i = 0; i < __nenv; i++) { | |
235 | char *e = *ep++; | |
236 | ||
237 | if (!e) | |
238 | continue; | |
239 | ||
240 | if ((strncmp(match, e, matchlen) == 0) | |
241 | && ((e[matchlen] == '\0') | |
242 | || (e[matchlen] == '='))) { | |
243 | char *cp = strchr(e, '='); | |
244 | return cp ? ++cp : ""; | |
245 | } | |
246 | } | |
247 | return NULL; | |
248 | } | |
249 | ||
250 | /* | |
251 | * kdballocenv - This function is used to allocate bytes for | |
252 | * environment entries. | |
253 | * Parameters: | |
254 | * match A character string representing a numeric value | |
255 | * Outputs: | |
256 | * *value the unsigned long representation of the env variable 'match' | |
257 | * Returns: | |
258 | * Zero on success, a kdb diagnostic on failure. | |
259 | * Remarks: | |
260 | * We use a static environment buffer (envbuffer) to hold the values | |
261 | * of dynamically generated environment variables (see kdb_set). Buffer | |
262 | * space once allocated is never free'd, so over time, the amount of space | |
263 | * (currently 512 bytes) will be exhausted if env variables are changed | |
264 | * frequently. | |
265 | */ | |
266 | static char *kdballocenv(size_t bytes) | |
267 | { | |
268 | #define KDB_ENVBUFSIZE 512 | |
269 | static char envbuffer[KDB_ENVBUFSIZE]; | |
270 | static int envbufsize; | |
271 | char *ep = NULL; | |
272 | ||
273 | if ((KDB_ENVBUFSIZE - envbufsize) >= bytes) { | |
274 | ep = &envbuffer[envbufsize]; | |
275 | envbufsize += bytes; | |
276 | } | |
277 | return ep; | |
278 | } | |
279 | ||
280 | /* | |
281 | * kdbgetulenv - This function will return the value of an unsigned | |
282 | * long-valued environment variable. | |
283 | * Parameters: | |
284 | * match A character string representing a numeric value | |
285 | * Outputs: | |
286 | * *value the unsigned long represntation of the env variable 'match' | |
287 | * Returns: | |
288 | * Zero on success, a kdb diagnostic on failure. | |
289 | */ | |
290 | static int kdbgetulenv(const char *match, unsigned long *value) | |
291 | { | |
292 | char *ep; | |
293 | ||
294 | ep = kdbgetenv(match); | |
295 | if (!ep) | |
296 | return KDB_NOTENV; | |
297 | if (strlen(ep) == 0) | |
298 | return KDB_NOENVVALUE; | |
299 | ||
300 | *value = simple_strtoul(ep, NULL, 0); | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | /* | |
306 | * kdbgetintenv - This function will return the value of an | |
307 | * integer-valued environment variable. | |
308 | * Parameters: | |
309 | * match A character string representing an integer-valued env variable | |
310 | * Outputs: | |
311 | * *value the integer representation of the environment variable 'match' | |
312 | * Returns: | |
313 | * Zero on success, a kdb diagnostic on failure. | |
314 | */ | |
315 | int kdbgetintenv(const char *match, int *value) | |
316 | { | |
317 | unsigned long val; | |
318 | int diag; | |
319 | ||
320 | diag = kdbgetulenv(match, &val); | |
321 | if (!diag) | |
322 | *value = (int) val; | |
323 | return diag; | |
324 | } | |
325 | ||
326 | /* | |
327 | * kdbgetularg - This function will convert a numeric string into an | |
328 | * unsigned long value. | |
329 | * Parameters: | |
330 | * arg A character string representing a numeric value | |
331 | * Outputs: | |
332 | * *value the unsigned long represntation of arg. | |
333 | * Returns: | |
334 | * Zero on success, a kdb diagnostic on failure. | |
335 | */ | |
336 | int kdbgetularg(const char *arg, unsigned long *value) | |
337 | { | |
338 | char *endp; | |
339 | unsigned long val; | |
340 | ||
341 | val = simple_strtoul(arg, &endp, 0); | |
342 | ||
343 | if (endp == arg) { | |
344 | /* | |
534af108 | 345 | * Also try base 16, for us folks too lazy to type the |
5d5314d6 JW |
346 | * leading 0x... |
347 | */ | |
348 | val = simple_strtoul(arg, &endp, 16); | |
349 | if (endp == arg) | |
350 | return KDB_BADINT; | |
351 | } | |
352 | ||
353 | *value = val; | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
534af108 JW |
358 | int kdbgetu64arg(const char *arg, u64 *value) |
359 | { | |
360 | char *endp; | |
361 | u64 val; | |
362 | ||
363 | val = simple_strtoull(arg, &endp, 0); | |
364 | ||
365 | if (endp == arg) { | |
366 | ||
367 | val = simple_strtoull(arg, &endp, 16); | |
368 | if (endp == arg) | |
369 | return KDB_BADINT; | |
370 | } | |
371 | ||
372 | *value = val; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
5d5314d6 JW |
377 | /* |
378 | * kdb_set - This function implements the 'set' command. Alter an | |
379 | * existing environment variable or create a new one. | |
380 | */ | |
381 | int kdb_set(int argc, const char **argv) | |
382 | { | |
383 | int i; | |
384 | char *ep; | |
385 | size_t varlen, vallen; | |
386 | ||
387 | /* | |
388 | * we can be invoked two ways: | |
389 | * set var=value argv[1]="var", argv[2]="value" | |
390 | * set var = value argv[1]="var", argv[2]="=", argv[3]="value" | |
391 | * - if the latter, shift 'em down. | |
392 | */ | |
393 | if (argc == 3) { | |
394 | argv[2] = argv[3]; | |
395 | argc--; | |
396 | } | |
397 | ||
398 | if (argc != 2) | |
399 | return KDB_ARGCOUNT; | |
400 | ||
401 | /* | |
402 | * Check for internal variables | |
403 | */ | |
404 | if (strcmp(argv[1], "KDBDEBUG") == 0) { | |
405 | unsigned int debugflags; | |
406 | char *cp; | |
407 | ||
408 | debugflags = simple_strtoul(argv[2], &cp, 0); | |
409 | if (cp == argv[2] || debugflags & ~KDB_DEBUG_FLAG_MASK) { | |
410 | kdb_printf("kdb: illegal debug flags '%s'\n", | |
411 | argv[2]); | |
412 | return 0; | |
413 | } | |
414 | kdb_flags = (kdb_flags & | |
415 | ~(KDB_DEBUG_FLAG_MASK << KDB_DEBUG_FLAG_SHIFT)) | |
416 | | (debugflags << KDB_DEBUG_FLAG_SHIFT); | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
421 | /* | |
422 | * Tokenizer squashed the '=' sign. argv[1] is variable | |
423 | * name, argv[2] = value. | |
424 | */ | |
425 | varlen = strlen(argv[1]); | |
426 | vallen = strlen(argv[2]); | |
427 | ep = kdballocenv(varlen + vallen + 2); | |
428 | if (ep == (char *)0) | |
429 | return KDB_ENVBUFFULL; | |
430 | ||
431 | sprintf(ep, "%s=%s", argv[1], argv[2]); | |
432 | ||
433 | ep[varlen+vallen+1] = '\0'; | |
434 | ||
435 | for (i = 0; i < __nenv; i++) { | |
436 | if (__env[i] | |
437 | && ((strncmp(__env[i], argv[1], varlen) == 0) | |
438 | && ((__env[i][varlen] == '\0') | |
439 | || (__env[i][varlen] == '=')))) { | |
440 | __env[i] = ep; | |
441 | return 0; | |
442 | } | |
443 | } | |
444 | ||
445 | /* | |
446 | * Wasn't existing variable. Fit into slot. | |
447 | */ | |
448 | for (i = 0; i < __nenv-1; i++) { | |
449 | if (__env[i] == (char *)0) { | |
450 | __env[i] = ep; | |
451 | return 0; | |
452 | } | |
453 | } | |
454 | ||
455 | return KDB_ENVFULL; | |
456 | } | |
457 | ||
458 | static int kdb_check_regs(void) | |
459 | { | |
460 | if (!kdb_current_regs) { | |
461 | kdb_printf("No current kdb registers." | |
462 | " You may need to select another task\n"); | |
463 | return KDB_BADREG; | |
464 | } | |
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * kdbgetaddrarg - This function is responsible for parsing an | |
470 | * address-expression and returning the value of the expression, | |
471 | * symbol name, and offset to the caller. | |
472 | * | |
473 | * The argument may consist of a numeric value (decimal or | |
25985edc | 474 | * hexidecimal), a symbol name, a register name (preceded by the |
5d5314d6 | 475 | * percent sign), an environment variable with a numeric value |
25985edc | 476 | * (preceded by a dollar sign) or a simple arithmetic expression |
5d5314d6 JW |
477 | * consisting of a symbol name, +/-, and a numeric constant value |
478 | * (offset). | |
479 | * Parameters: | |
480 | * argc - count of arguments in argv | |
481 | * argv - argument vector | |
482 | * *nextarg - index to next unparsed argument in argv[] | |
483 | * regs - Register state at time of KDB entry | |
484 | * Outputs: | |
485 | * *value - receives the value of the address-expression | |
486 | * *offset - receives the offset specified, if any | |
487 | * *name - receives the symbol name, if any | |
488 | * *nextarg - index to next unparsed argument in argv[] | |
489 | * Returns: | |
490 | * zero is returned on success, a kdb diagnostic code is | |
491 | * returned on error. | |
492 | */ | |
493 | int kdbgetaddrarg(int argc, const char **argv, int *nextarg, | |
494 | unsigned long *value, long *offset, | |
495 | char **name) | |
496 | { | |
497 | unsigned long addr; | |
498 | unsigned long off = 0; | |
499 | int positive; | |
500 | int diag; | |
501 | int found = 0; | |
502 | char *symname; | |
503 | char symbol = '\0'; | |
504 | char *cp; | |
505 | kdb_symtab_t symtab; | |
506 | ||
420c2b1b AV |
507 | /* |
508 | * If the enable flags prohibit both arbitrary memory access | |
509 | * and flow control then there are no reasonable grounds to | |
510 | * provide symbol lookup. | |
511 | */ | |
512 | if (!kdb_check_flags(KDB_ENABLE_MEM_READ | KDB_ENABLE_FLOW_CTRL, | |
513 | kdb_cmd_enabled, false)) | |
514 | return KDB_NOPERM; | |
515 | ||
5d5314d6 JW |
516 | /* |
517 | * Process arguments which follow the following syntax: | |
518 | * | |
519 | * symbol | numeric-address [+/- numeric-offset] | |
520 | * %register | |
521 | * $environment-variable | |
522 | */ | |
523 | ||
524 | if (*nextarg > argc) | |
525 | return KDB_ARGCOUNT; | |
526 | ||
527 | symname = (char *)argv[*nextarg]; | |
528 | ||
529 | /* | |
530 | * If there is no whitespace between the symbol | |
531 | * or address and the '+' or '-' symbols, we | |
532 | * remember the character and replace it with a | |
533 | * null so the symbol/value can be properly parsed | |
534 | */ | |
535 | cp = strpbrk(symname, "+-"); | |
536 | if (cp != NULL) { | |
537 | symbol = *cp; | |
538 | *cp++ = '\0'; | |
539 | } | |
540 | ||
541 | if (symname[0] == '$') { | |
542 | diag = kdbgetulenv(&symname[1], &addr); | |
543 | if (diag) | |
544 | return diag; | |
545 | } else if (symname[0] == '%') { | |
546 | diag = kdb_check_regs(); | |
547 | if (diag) | |
548 | return diag; | |
549 | /* Implement register values with % at a later time as it is | |
550 | * arch optional. | |
551 | */ | |
552 | return KDB_NOTIMP; | |
553 | } else { | |
554 | found = kdbgetsymval(symname, &symtab); | |
555 | if (found) { | |
556 | addr = symtab.sym_start; | |
557 | } else { | |
558 | diag = kdbgetularg(argv[*nextarg], &addr); | |
559 | if (diag) | |
560 | return diag; | |
561 | } | |
562 | } | |
563 | ||
564 | if (!found) | |
565 | found = kdbnearsym(addr, &symtab); | |
566 | ||
567 | (*nextarg)++; | |
568 | ||
569 | if (name) | |
570 | *name = symname; | |
571 | if (value) | |
572 | *value = addr; | |
573 | if (offset && name && *name) | |
574 | *offset = addr - symtab.sym_start; | |
575 | ||
576 | if ((*nextarg > argc) | |
577 | && (symbol == '\0')) | |
578 | return 0; | |
579 | ||
580 | /* | |
581 | * check for +/- and offset | |
582 | */ | |
583 | ||
584 | if (symbol == '\0') { | |
585 | if ((argv[*nextarg][0] != '+') | |
586 | && (argv[*nextarg][0] != '-')) { | |
587 | /* | |
588 | * Not our argument. Return. | |
589 | */ | |
590 | return 0; | |
591 | } else { | |
592 | positive = (argv[*nextarg][0] == '+'); | |
593 | (*nextarg)++; | |
594 | } | |
595 | } else | |
596 | positive = (symbol == '+'); | |
597 | ||
598 | /* | |
599 | * Now there must be an offset! | |
600 | */ | |
601 | if ((*nextarg > argc) | |
602 | && (symbol == '\0')) { | |
603 | return KDB_INVADDRFMT; | |
604 | } | |
605 | ||
606 | if (!symbol) { | |
607 | cp = (char *)argv[*nextarg]; | |
608 | (*nextarg)++; | |
609 | } | |
610 | ||
611 | diag = kdbgetularg(cp, &off); | |
612 | if (diag) | |
613 | return diag; | |
614 | ||
615 | if (!positive) | |
616 | off = -off; | |
617 | ||
618 | if (offset) | |
619 | *offset += off; | |
620 | ||
621 | if (value) | |
622 | *value += off; | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static void kdb_cmderror(int diag) | |
628 | { | |
629 | int i; | |
630 | ||
631 | if (diag >= 0) { | |
632 | kdb_printf("no error detected (diagnostic is %d)\n", diag); | |
633 | return; | |
634 | } | |
635 | ||
636 | for (i = 0; i < __nkdb_err; i++) { | |
637 | if (kdbmsgs[i].km_diag == diag) { | |
638 | kdb_printf("diag: %d: %s\n", diag, kdbmsgs[i].km_msg); | |
639 | return; | |
640 | } | |
641 | } | |
642 | ||
643 | kdb_printf("Unknown diag %d\n", -diag); | |
644 | } | |
645 | ||
646 | /* | |
647 | * kdb_defcmd, kdb_defcmd2 - This function implements the 'defcmd' | |
648 | * command which defines one command as a set of other commands, | |
649 | * terminated by endefcmd. kdb_defcmd processes the initial | |
650 | * 'defcmd' command, kdb_defcmd2 is invoked from kdb_parse for | |
651 | * the following commands until 'endefcmd'. | |
652 | * Inputs: | |
653 | * argc argument count | |
654 | * argv argument vector | |
655 | * Returns: | |
656 | * zero for success, a kdb diagnostic if error | |
657 | */ | |
658 | struct defcmd_set { | |
659 | int count; | |
660 | int usable; | |
661 | char *name; | |
662 | char *usage; | |
663 | char *help; | |
664 | char **command; | |
665 | }; | |
666 | static struct defcmd_set *defcmd_set; | |
667 | static int defcmd_set_count; | |
668 | static int defcmd_in_progress; | |
669 | ||
670 | /* Forward references */ | |
671 | static int kdb_exec_defcmd(int argc, const char **argv); | |
672 | ||
673 | static int kdb_defcmd2(const char *cmdstr, const char *argv0) | |
674 | { | |
675 | struct defcmd_set *s = defcmd_set + defcmd_set_count - 1; | |
676 | char **save_command = s->command; | |
677 | if (strcmp(argv0, "endefcmd") == 0) { | |
678 | defcmd_in_progress = 0; | |
679 | if (!s->count) | |
680 | s->usable = 0; | |
681 | if (s->usable) | |
9452e977 DT |
682 | /* macros are always safe because when executed each |
683 | * internal command re-enters kdb_parse() and is | |
684 | * safety checked individually. | |
685 | */ | |
686 | kdb_register_flags(s->name, kdb_exec_defcmd, s->usage, | |
687 | s->help, 0, | |
688 | KDB_ENABLE_ALWAYS_SAFE); | |
5d5314d6 JW |
689 | return 0; |
690 | } | |
691 | if (!s->usable) | |
692 | return KDB_NOTIMP; | |
5450d904 | 693 | s->command = kzalloc((s->count + 1) * sizeof(*(s->command)), GFP_KDB); |
5d5314d6 JW |
694 | if (!s->command) { |
695 | kdb_printf("Could not allocate new kdb_defcmd table for %s\n", | |
696 | cmdstr); | |
697 | s->usable = 0; | |
698 | return KDB_NOTIMP; | |
699 | } | |
700 | memcpy(s->command, save_command, s->count * sizeof(*(s->command))); | |
701 | s->command[s->count++] = kdb_strdup(cmdstr, GFP_KDB); | |
702 | kfree(save_command); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static int kdb_defcmd(int argc, const char **argv) | |
707 | { | |
708 | struct defcmd_set *save_defcmd_set = defcmd_set, *s; | |
709 | if (defcmd_in_progress) { | |
710 | kdb_printf("kdb: nested defcmd detected, assuming missing " | |
711 | "endefcmd\n"); | |
712 | kdb_defcmd2("endefcmd", "endefcmd"); | |
713 | } | |
714 | if (argc == 0) { | |
715 | int i; | |
716 | for (s = defcmd_set; s < defcmd_set + defcmd_set_count; ++s) { | |
717 | kdb_printf("defcmd %s \"%s\" \"%s\"\n", s->name, | |
718 | s->usage, s->help); | |
719 | for (i = 0; i < s->count; ++i) | |
720 | kdb_printf("%s", s->command[i]); | |
721 | kdb_printf("endefcmd\n"); | |
722 | } | |
723 | return 0; | |
724 | } | |
725 | if (argc != 3) | |
726 | return KDB_ARGCOUNT; | |
a37372f6 JW |
727 | if (in_dbg_master()) { |
728 | kdb_printf("Command only available during kdb_init()\n"); | |
729 | return KDB_NOTIMP; | |
730 | } | |
5d5314d6 JW |
731 | defcmd_set = kmalloc((defcmd_set_count + 1) * sizeof(*defcmd_set), |
732 | GFP_KDB); | |
4eb7a66d JW |
733 | if (!defcmd_set) |
734 | goto fail_defcmd; | |
5d5314d6 JW |
735 | memcpy(defcmd_set, save_defcmd_set, |
736 | defcmd_set_count * sizeof(*defcmd_set)); | |
5d5314d6 JW |
737 | s = defcmd_set + defcmd_set_count; |
738 | memset(s, 0, sizeof(*s)); | |
739 | s->usable = 1; | |
740 | s->name = kdb_strdup(argv[1], GFP_KDB); | |
4eb7a66d JW |
741 | if (!s->name) |
742 | goto fail_name; | |
5d5314d6 | 743 | s->usage = kdb_strdup(argv[2], GFP_KDB); |
4eb7a66d JW |
744 | if (!s->usage) |
745 | goto fail_usage; | |
5d5314d6 | 746 | s->help = kdb_strdup(argv[3], GFP_KDB); |
4eb7a66d JW |
747 | if (!s->help) |
748 | goto fail_help; | |
5d5314d6 | 749 | if (s->usage[0] == '"') { |
4eb7a66d | 750 | strcpy(s->usage, argv[2]+1); |
5d5314d6 JW |
751 | s->usage[strlen(s->usage)-1] = '\0'; |
752 | } | |
753 | if (s->help[0] == '"') { | |
4eb7a66d | 754 | strcpy(s->help, argv[3]+1); |
5d5314d6 JW |
755 | s->help[strlen(s->help)-1] = '\0'; |
756 | } | |
757 | ++defcmd_set_count; | |
758 | defcmd_in_progress = 1; | |
4eb7a66d | 759 | kfree(save_defcmd_set); |
5d5314d6 | 760 | return 0; |
4eb7a66d JW |
761 | fail_help: |
762 | kfree(s->usage); | |
763 | fail_usage: | |
764 | kfree(s->name); | |
765 | fail_name: | |
766 | kfree(defcmd_set); | |
767 | fail_defcmd: | |
768 | kdb_printf("Could not allocate new defcmd_set entry for %s\n", argv[1]); | |
769 | defcmd_set = save_defcmd_set; | |
770 | return KDB_NOTIMP; | |
5d5314d6 JW |
771 | } |
772 | ||
773 | /* | |
774 | * kdb_exec_defcmd - Execute the set of commands associated with this | |
775 | * defcmd name. | |
776 | * Inputs: | |
777 | * argc argument count | |
778 | * argv argument vector | |
779 | * Returns: | |
780 | * zero for success, a kdb diagnostic if error | |
781 | */ | |
782 | static int kdb_exec_defcmd(int argc, const char **argv) | |
783 | { | |
784 | int i, ret; | |
785 | struct defcmd_set *s; | |
786 | if (argc != 0) | |
787 | return KDB_ARGCOUNT; | |
788 | for (s = defcmd_set, i = 0; i < defcmd_set_count; ++i, ++s) { | |
789 | if (strcmp(s->name, argv[0]) == 0) | |
790 | break; | |
791 | } | |
792 | if (i == defcmd_set_count) { | |
793 | kdb_printf("kdb_exec_defcmd: could not find commands for %s\n", | |
794 | argv[0]); | |
795 | return KDB_NOTIMP; | |
796 | } | |
797 | for (i = 0; i < s->count; ++i) { | |
798 | /* Recursive use of kdb_parse, do not use argv after | |
799 | * this point */ | |
800 | argv = NULL; | |
801 | kdb_printf("[%s]kdb> %s\n", s->name, s->command[i]); | |
802 | ret = kdb_parse(s->command[i]); | |
803 | if (ret) | |
804 | return ret; | |
805 | } | |
806 | return 0; | |
807 | } | |
808 | ||
809 | /* Command history */ | |
810 | #define KDB_CMD_HISTORY_COUNT 32 | |
811 | #define CMD_BUFLEN 200 /* kdb_printf: max printline | |
812 | * size == 256 */ | |
813 | static unsigned int cmd_head, cmd_tail; | |
814 | static unsigned int cmdptr; | |
815 | static char cmd_hist[KDB_CMD_HISTORY_COUNT][CMD_BUFLEN]; | |
816 | static char cmd_cur[CMD_BUFLEN]; | |
817 | ||
818 | /* | |
819 | * The "str" argument may point to something like | grep xyz | |
820 | */ | |
821 | static void parse_grep(const char *str) | |
822 | { | |
823 | int len; | |
824 | char *cp = (char *)str, *cp2; | |
825 | ||
826 | /* sanity check: we should have been called with the \ first */ | |
827 | if (*cp != '|') | |
828 | return; | |
829 | cp++; | |
830 | while (isspace(*cp)) | |
831 | cp++; | |
832 | if (strncmp(cp, "grep ", 5)) { | |
833 | kdb_printf("invalid 'pipe', see grephelp\n"); | |
834 | return; | |
835 | } | |
836 | cp += 5; | |
837 | while (isspace(*cp)) | |
838 | cp++; | |
839 | cp2 = strchr(cp, '\n'); | |
840 | if (cp2) | |
841 | *cp2 = '\0'; /* remove the trailing newline */ | |
842 | len = strlen(cp); | |
843 | if (len == 0) { | |
844 | kdb_printf("invalid 'pipe', see grephelp\n"); | |
845 | return; | |
846 | } | |
847 | /* now cp points to a nonzero length search string */ | |
848 | if (*cp == '"') { | |
849 | /* allow it be "x y z" by removing the "'s - there must | |
850 | be two of them */ | |
851 | cp++; | |
852 | cp2 = strchr(cp, '"'); | |
853 | if (!cp2) { | |
854 | kdb_printf("invalid quoted string, see grephelp\n"); | |
855 | return; | |
856 | } | |
857 | *cp2 = '\0'; /* end the string where the 2nd " was */ | |
858 | } | |
859 | kdb_grep_leading = 0; | |
860 | if (*cp == '^') { | |
861 | kdb_grep_leading = 1; | |
862 | cp++; | |
863 | } | |
864 | len = strlen(cp); | |
865 | kdb_grep_trailing = 0; | |
866 | if (*(cp+len-1) == '$') { | |
867 | kdb_grep_trailing = 1; | |
868 | *(cp+len-1) = '\0'; | |
869 | } | |
870 | len = strlen(cp); | |
871 | if (!len) | |
872 | return; | |
873 | if (len >= GREP_LEN) { | |
874 | kdb_printf("search string too long\n"); | |
875 | return; | |
876 | } | |
877 | strcpy(kdb_grep_string, cp); | |
878 | kdb_grepping_flag++; | |
879 | return; | |
880 | } | |
881 | ||
882 | /* | |
883 | * kdb_parse - Parse the command line, search the command table for a | |
884 | * matching command and invoke the command function. This | |
885 | * function may be called recursively, if it is, the second call | |
886 | * will overwrite argv and cbuf. It is the caller's | |
887 | * responsibility to save their argv if they recursively call | |
888 | * kdb_parse(). | |
889 | * Parameters: | |
890 | * cmdstr The input command line to be parsed. | |
891 | * regs The registers at the time kdb was entered. | |
892 | * Returns: | |
893 | * Zero for success, a kdb diagnostic if failure. | |
894 | * Remarks: | |
895 | * Limited to 20 tokens. | |
896 | * | |
897 | * Real rudimentary tokenization. Basically only whitespace | |
898 | * is considered a token delimeter (but special consideration | |
899 | * is taken of the '=' sign as used by the 'set' command). | |
900 | * | |
901 | * The algorithm used to tokenize the input string relies on | |
902 | * there being at least one whitespace (or otherwise useless) | |
903 | * character between tokens as the character immediately following | |
904 | * the token is altered in-place to a null-byte to terminate the | |
905 | * token string. | |
906 | */ | |
907 | ||
908 | #define MAXARGC 20 | |
909 | ||
910 | int kdb_parse(const char *cmdstr) | |
911 | { | |
912 | static char *argv[MAXARGC]; | |
913 | static int argc; | |
914 | static char cbuf[CMD_BUFLEN+2]; | |
915 | char *cp; | |
916 | char *cpp, quoted; | |
917 | kdbtab_t *tp; | |
918 | int i, escaped, ignore_errors = 0, check_grep; | |
919 | ||
920 | /* | |
921 | * First tokenize the command string. | |
922 | */ | |
923 | cp = (char *)cmdstr; | |
924 | kdb_grepping_flag = check_grep = 0; | |
925 | ||
926 | if (KDB_FLAG(CMD_INTERRUPT)) { | |
927 | /* Previous command was interrupted, newline must not | |
928 | * repeat the command */ | |
929 | KDB_FLAG_CLEAR(CMD_INTERRUPT); | |
930 | KDB_STATE_SET(PAGER); | |
931 | argc = 0; /* no repeat */ | |
932 | } | |
933 | ||
934 | if (*cp != '\n' && *cp != '\0') { | |
935 | argc = 0; | |
936 | cpp = cbuf; | |
937 | while (*cp) { | |
938 | /* skip whitespace */ | |
939 | while (isspace(*cp)) | |
940 | cp++; | |
941 | if ((*cp == '\0') || (*cp == '\n') || | |
942 | (*cp == '#' && !defcmd_in_progress)) | |
943 | break; | |
944 | /* special case: check for | grep pattern */ | |
945 | if (*cp == '|') { | |
946 | check_grep++; | |
947 | break; | |
948 | } | |
949 | if (cpp >= cbuf + CMD_BUFLEN) { | |
950 | kdb_printf("kdb_parse: command buffer " | |
951 | "overflow, command ignored\n%s\n", | |
952 | cmdstr); | |
953 | return KDB_NOTFOUND; | |
954 | } | |
955 | if (argc >= MAXARGC - 1) { | |
956 | kdb_printf("kdb_parse: too many arguments, " | |
957 | "command ignored\n%s\n", cmdstr); | |
958 | return KDB_NOTFOUND; | |
959 | } | |
960 | argv[argc++] = cpp; | |
961 | escaped = 0; | |
962 | quoted = '\0'; | |
963 | /* Copy to next unquoted and unescaped | |
964 | * whitespace or '=' */ | |
965 | while (*cp && *cp != '\n' && | |
966 | (escaped || quoted || !isspace(*cp))) { | |
967 | if (cpp >= cbuf + CMD_BUFLEN) | |
968 | break; | |
969 | if (escaped) { | |
970 | escaped = 0; | |
971 | *cpp++ = *cp++; | |
972 | continue; | |
973 | } | |
974 | if (*cp == '\\') { | |
975 | escaped = 1; | |
976 | ++cp; | |
977 | continue; | |
978 | } | |
979 | if (*cp == quoted) | |
980 | quoted = '\0'; | |
981 | else if (*cp == '\'' || *cp == '"') | |
982 | quoted = *cp; | |
983 | *cpp = *cp++; | |
984 | if (*cpp == '=' && !quoted) | |
985 | break; | |
986 | ++cpp; | |
987 | } | |
988 | *cpp++ = '\0'; /* Squash a ws or '=' character */ | |
989 | } | |
990 | } | |
991 | if (!argc) | |
992 | return 0; | |
993 | if (check_grep) | |
994 | parse_grep(cp); | |
995 | if (defcmd_in_progress) { | |
996 | int result = kdb_defcmd2(cmdstr, argv[0]); | |
997 | if (!defcmd_in_progress) { | |
998 | argc = 0; /* avoid repeat on endefcmd */ | |
999 | *(argv[0]) = '\0'; | |
1000 | } | |
1001 | return result; | |
1002 | } | |
1003 | if (argv[0][0] == '-' && argv[0][1] && | |
1004 | (argv[0][1] < '0' || argv[0][1] > '9')) { | |
1005 | ignore_errors = 1; | |
1006 | ++argv[0]; | |
1007 | } | |
1008 | ||
1009 | for_each_kdbcmd(tp, i) { | |
1010 | if (tp->cmd_name) { | |
1011 | /* | |
1012 | * If this command is allowed to be abbreviated, | |
1013 | * check to see if this is it. | |
1014 | */ | |
1015 | ||
1016 | if (tp->cmd_minlen | |
1017 | && (strlen(argv[0]) <= tp->cmd_minlen)) { | |
1018 | if (strncmp(argv[0], | |
1019 | tp->cmd_name, | |
1020 | tp->cmd_minlen) == 0) { | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | if (strcmp(argv[0], tp->cmd_name) == 0) | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * If we don't find a command by this name, see if the first | |
1032 | * few characters of this match any of the known commands. | |
1033 | * e.g., md1c20 should match md. | |
1034 | */ | |
1035 | if (i == kdb_max_commands) { | |
1036 | for_each_kdbcmd(tp, i) { | |
1037 | if (tp->cmd_name) { | |
1038 | if (strncmp(argv[0], | |
1039 | tp->cmd_name, | |
1040 | strlen(tp->cmd_name)) == 0) { | |
1041 | break; | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | if (i < kdb_max_commands) { | |
1048 | int result; | |
420c2b1b AV |
1049 | |
1050 | if (!kdb_check_flags(tp->cmd_flags, kdb_cmd_enabled, argc <= 1)) | |
1051 | return KDB_NOPERM; | |
1052 | ||
5d5314d6 JW |
1053 | KDB_STATE_SET(CMD); |
1054 | result = (*tp->cmd_func)(argc-1, (const char **)argv); | |
1055 | if (result && ignore_errors && result > KDB_CMD_GO) | |
1056 | result = 0; | |
1057 | KDB_STATE_CLEAR(CMD); | |
04bb171e AV |
1058 | |
1059 | if (tp->cmd_flags & KDB_REPEAT_WITH_ARGS) | |
1060 | return result; | |
1061 | ||
1062 | argc = tp->cmd_flags & KDB_REPEAT_NO_ARGS ? 1 : 0; | |
1063 | if (argv[argc]) | |
1064 | *(argv[argc]) = '\0'; | |
5d5314d6 JW |
1065 | return result; |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * If the input with which we were presented does not | |
1070 | * map to an existing command, attempt to parse it as an | |
1071 | * address argument and display the result. Useful for | |
1072 | * obtaining the address of a variable, or the nearest symbol | |
1073 | * to an address contained in a register. | |
1074 | */ | |
1075 | { | |
1076 | unsigned long value; | |
1077 | char *name = NULL; | |
1078 | long offset; | |
1079 | int nextarg = 0; | |
1080 | ||
1081 | if (kdbgetaddrarg(0, (const char **)argv, &nextarg, | |
1082 | &value, &offset, &name)) { | |
1083 | return KDB_NOTFOUND; | |
1084 | } | |
1085 | ||
1086 | kdb_printf("%s = ", argv[0]); | |
1087 | kdb_symbol_print(value, NULL, KDB_SP_DEFAULT); | |
1088 | kdb_printf("\n"); | |
1089 | return 0; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | ||
1094 | static int handle_ctrl_cmd(char *cmd) | |
1095 | { | |
1096 | #define CTRL_P 16 | |
1097 | #define CTRL_N 14 | |
1098 | ||
1099 | /* initial situation */ | |
1100 | if (cmd_head == cmd_tail) | |
1101 | return 0; | |
1102 | switch (*cmd) { | |
1103 | case CTRL_P: | |
1104 | if (cmdptr != cmd_tail) | |
1105 | cmdptr = (cmdptr-1) % KDB_CMD_HISTORY_COUNT; | |
1106 | strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN); | |
1107 | return 1; | |
1108 | case CTRL_N: | |
1109 | if (cmdptr != cmd_head) | |
1110 | cmdptr = (cmdptr+1) % KDB_CMD_HISTORY_COUNT; | |
1111 | strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN); | |
1112 | return 1; | |
1113 | } | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | /* | |
1118 | * kdb_reboot - This function implements the 'reboot' command. Reboot | |
1119 | * the system immediately, or loop for ever on failure. | |
1120 | */ | |
1121 | static int kdb_reboot(int argc, const char **argv) | |
1122 | { | |
1123 | emergency_restart(); | |
1124 | kdb_printf("Hmm, kdb_reboot did not reboot, spinning here\n"); | |
1125 | while (1) | |
1126 | cpu_relax(); | |
1127 | /* NOTREACHED */ | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static void kdb_dumpregs(struct pt_regs *regs) | |
1132 | { | |
1133 | int old_lvl = console_loglevel; | |
a8fe19eb | 1134 | console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH; |
d37d39ae | 1135 | kdb_trap_printk++; |
5d5314d6 | 1136 | show_regs(regs); |
d37d39ae | 1137 | kdb_trap_printk--; |
5d5314d6 JW |
1138 | kdb_printf("\n"); |
1139 | console_loglevel = old_lvl; | |
1140 | } | |
1141 | ||
1142 | void kdb_set_current_task(struct task_struct *p) | |
1143 | { | |
1144 | kdb_current_task = p; | |
1145 | ||
1146 | if (kdb_task_has_cpu(p)) { | |
1147 | kdb_current_regs = KDB_TSKREGS(kdb_process_cpu(p)); | |
1148 | return; | |
1149 | } | |
1150 | kdb_current_regs = NULL; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * kdb_local - The main code for kdb. This routine is invoked on a | |
1155 | * specific processor, it is not global. The main kdb() routine | |
1156 | * ensures that only one processor at a time is in this routine. | |
1157 | * This code is called with the real reason code on the first | |
1158 | * entry to a kdb session, thereafter it is called with reason | |
1159 | * SWITCH, even if the user goes back to the original cpu. | |
1160 | * Inputs: | |
1161 | * reason The reason KDB was invoked | |
1162 | * error The hardware-defined error code | |
1163 | * regs The exception frame at time of fault/breakpoint. | |
1164 | * db_result Result code from the break or debug point. | |
1165 | * Returns: | |
1166 | * 0 KDB was invoked for an event which it wasn't responsible | |
1167 | * 1 KDB handled the event for which it was invoked. | |
1168 | * KDB_CMD_GO User typed 'go'. | |
1169 | * KDB_CMD_CPU User switched to another cpu. | |
1170 | * KDB_CMD_SS Single step. | |
5d5314d6 JW |
1171 | */ |
1172 | static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs, | |
1173 | kdb_dbtrap_t db_result) | |
1174 | { | |
1175 | char *cmdbuf; | |
1176 | int diag; | |
1177 | struct task_struct *kdb_current = | |
1178 | kdb_curr_task(raw_smp_processor_id()); | |
1179 | ||
1180 | KDB_DEBUG_STATE("kdb_local 1", reason); | |
1181 | kdb_go_count = 0; | |
1182 | if (reason == KDB_REASON_DEBUG) { | |
1183 | /* special case below */ | |
1184 | } else { | |
1185 | kdb_printf("\nEntering kdb (current=0x%p, pid %d) ", | |
578bd4df | 1186 | kdb_current, kdb_current ? kdb_current->pid : 0); |
5d5314d6 JW |
1187 | #if defined(CONFIG_SMP) |
1188 | kdb_printf("on processor %d ", raw_smp_processor_id()); | |
1189 | #endif | |
1190 | } | |
1191 | ||
1192 | switch (reason) { | |
1193 | case KDB_REASON_DEBUG: | |
1194 | { | |
1195 | /* | |
1196 | * If re-entering kdb after a single step | |
1197 | * command, don't print the message. | |
1198 | */ | |
1199 | switch (db_result) { | |
1200 | case KDB_DB_BPT: | |
1201 | kdb_printf("\nEntering kdb (0x%p, pid %d) ", | |
1202 | kdb_current, kdb_current->pid); | |
1203 | #if defined(CONFIG_SMP) | |
1204 | kdb_printf("on processor %d ", raw_smp_processor_id()); | |
1205 | #endif | |
1206 | kdb_printf("due to Debug @ " kdb_machreg_fmt "\n", | |
1207 | instruction_pointer(regs)); | |
1208 | break; | |
5d5314d6 JW |
1209 | case KDB_DB_SS: |
1210 | break; | |
1211 | case KDB_DB_SSBPT: | |
1212 | KDB_DEBUG_STATE("kdb_local 4", reason); | |
1213 | return 1; /* kdba_db_trap did the work */ | |
1214 | default: | |
1215 | kdb_printf("kdb: Bad result from kdba_db_trap: %d\n", | |
1216 | db_result); | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | } | |
1221 | break; | |
1222 | case KDB_REASON_ENTER: | |
1223 | if (KDB_STATE(KEYBOARD)) | |
1224 | kdb_printf("due to Keyboard Entry\n"); | |
1225 | else | |
1226 | kdb_printf("due to KDB_ENTER()\n"); | |
1227 | break; | |
1228 | case KDB_REASON_KEYBOARD: | |
1229 | KDB_STATE_SET(KEYBOARD); | |
1230 | kdb_printf("due to Keyboard Entry\n"); | |
1231 | break; | |
1232 | case KDB_REASON_ENTER_SLAVE: | |
1233 | /* drop through, slaves only get released via cpu switch */ | |
1234 | case KDB_REASON_SWITCH: | |
1235 | kdb_printf("due to cpu switch\n"); | |
1236 | break; | |
1237 | case KDB_REASON_OOPS: | |
1238 | kdb_printf("Oops: %s\n", kdb_diemsg); | |
1239 | kdb_printf("due to oops @ " kdb_machreg_fmt "\n", | |
1240 | instruction_pointer(regs)); | |
1241 | kdb_dumpregs(regs); | |
1242 | break; | |
8daaa5f8 MT |
1243 | case KDB_REASON_SYSTEM_NMI: |
1244 | kdb_printf("due to System NonMaskable Interrupt\n"); | |
1245 | break; | |
5d5314d6 JW |
1246 | case KDB_REASON_NMI: |
1247 | kdb_printf("due to NonMaskable Interrupt @ " | |
1248 | kdb_machreg_fmt "\n", | |
1249 | instruction_pointer(regs)); | |
1250 | kdb_dumpregs(regs); | |
1251 | break; | |
1252 | case KDB_REASON_SSTEP: | |
1253 | case KDB_REASON_BREAK: | |
1254 | kdb_printf("due to %s @ " kdb_machreg_fmt "\n", | |
1255 | reason == KDB_REASON_BREAK ? | |
1256 | "Breakpoint" : "SS trap", instruction_pointer(regs)); | |
1257 | /* | |
1258 | * Determine if this breakpoint is one that we | |
1259 | * are interested in. | |
1260 | */ | |
1261 | if (db_result != KDB_DB_BPT) { | |
1262 | kdb_printf("kdb: error return from kdba_bp_trap: %d\n", | |
1263 | db_result); | |
1264 | KDB_DEBUG_STATE("kdb_local 6", reason); | |
1265 | return 0; /* Not for us, dismiss it */ | |
1266 | } | |
1267 | break; | |
1268 | case KDB_REASON_RECURSE: | |
1269 | kdb_printf("due to Recursion @ " kdb_machreg_fmt "\n", | |
1270 | instruction_pointer(regs)); | |
1271 | break; | |
1272 | default: | |
1273 | kdb_printf("kdb: unexpected reason code: %d\n", reason); | |
1274 | KDB_DEBUG_STATE("kdb_local 8", reason); | |
1275 | return 0; /* Not for us, dismiss it */ | |
1276 | } | |
1277 | ||
1278 | while (1) { | |
1279 | /* | |
1280 | * Initialize pager context. | |
1281 | */ | |
1282 | kdb_nextline = 1; | |
1283 | KDB_STATE_CLEAR(SUPPRESS); | |
1284 | ||
1285 | cmdbuf = cmd_cur; | |
1286 | *cmdbuf = '\0'; | |
1287 | *(cmd_hist[cmd_head]) = '\0'; | |
1288 | ||
5d5314d6 JW |
1289 | do_full_getstr: |
1290 | #if defined(CONFIG_SMP) | |
1291 | snprintf(kdb_prompt_str, CMD_BUFLEN, kdbgetenv("PROMPT"), | |
1292 | raw_smp_processor_id()); | |
1293 | #else | |
1294 | snprintf(kdb_prompt_str, CMD_BUFLEN, kdbgetenv("PROMPT")); | |
1295 | #endif | |
1296 | if (defcmd_in_progress) | |
1297 | strncat(kdb_prompt_str, "[defcmd]", CMD_BUFLEN); | |
1298 | ||
1299 | /* | |
1300 | * Fetch command from keyboard | |
1301 | */ | |
1302 | cmdbuf = kdb_getstr(cmdbuf, CMD_BUFLEN, kdb_prompt_str); | |
1303 | if (*cmdbuf != '\n') { | |
1304 | if (*cmdbuf < 32) { | |
1305 | if (cmdptr == cmd_head) { | |
1306 | strncpy(cmd_hist[cmd_head], cmd_cur, | |
1307 | CMD_BUFLEN); | |
1308 | *(cmd_hist[cmd_head] + | |
1309 | strlen(cmd_hist[cmd_head])-1) = '\0'; | |
1310 | } | |
1311 | if (!handle_ctrl_cmd(cmdbuf)) | |
1312 | *(cmd_cur+strlen(cmd_cur)-1) = '\0'; | |
1313 | cmdbuf = cmd_cur; | |
1314 | goto do_full_getstr; | |
1315 | } else { | |
1316 | strncpy(cmd_hist[cmd_head], cmd_cur, | |
1317 | CMD_BUFLEN); | |
1318 | } | |
1319 | ||
1320 | cmd_head = (cmd_head+1) % KDB_CMD_HISTORY_COUNT; | |
1321 | if (cmd_head == cmd_tail) | |
1322 | cmd_tail = (cmd_tail+1) % KDB_CMD_HISTORY_COUNT; | |
1323 | } | |
1324 | ||
1325 | cmdptr = cmd_head; | |
1326 | diag = kdb_parse(cmdbuf); | |
1327 | if (diag == KDB_NOTFOUND) { | |
1328 | kdb_printf("Unknown kdb command: '%s'\n", cmdbuf); | |
1329 | diag = 0; | |
1330 | } | |
1331 | if (diag == KDB_CMD_GO | |
1332 | || diag == KDB_CMD_CPU | |
1333 | || diag == KDB_CMD_SS | |
5d5314d6 JW |
1334 | || diag == KDB_CMD_KGDB) |
1335 | break; | |
1336 | ||
1337 | if (diag) | |
1338 | kdb_cmderror(diag); | |
1339 | } | |
1340 | KDB_DEBUG_STATE("kdb_local 9", diag); | |
1341 | return diag; | |
1342 | } | |
1343 | ||
1344 | ||
1345 | /* | |
1346 | * kdb_print_state - Print the state data for the current processor | |
1347 | * for debugging. | |
1348 | * Inputs: | |
1349 | * text Identifies the debug point | |
1350 | * value Any integer value to be printed, e.g. reason code. | |
1351 | */ | |
1352 | void kdb_print_state(const char *text, int value) | |
1353 | { | |
1354 | kdb_printf("state: %s cpu %d value %d initial %d state %x\n", | |
1355 | text, raw_smp_processor_id(), value, kdb_initial_cpu, | |
1356 | kdb_state); | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * kdb_main_loop - After initial setup and assignment of the | |
1361 | * controlling cpu, all cpus are in this loop. One cpu is in | |
1362 | * control and will issue the kdb prompt, the others will spin | |
1363 | * until 'go' or cpu switch. | |
1364 | * | |
1365 | * To get a consistent view of the kernel stacks for all | |
1366 | * processes, this routine is invoked from the main kdb code via | |
1367 | * an architecture specific routine. kdba_main_loop is | |
1368 | * responsible for making the kernel stacks consistent for all | |
1369 | * processes, there should be no difference between a blocked | |
1370 | * process and a running process as far as kdb is concerned. | |
1371 | * Inputs: | |
1372 | * reason The reason KDB was invoked | |
1373 | * error The hardware-defined error code | |
1374 | * reason2 kdb's current reason code. | |
1375 | * Initially error but can change | |
25985edc | 1376 | * according to kdb state. |
5d5314d6 JW |
1377 | * db_result Result code from break or debug point. |
1378 | * regs The exception frame at time of fault/breakpoint. | |
1379 | * should always be valid. | |
1380 | * Returns: | |
1381 | * 0 KDB was invoked for an event which it wasn't responsible | |
1382 | * 1 KDB handled the event for which it was invoked. | |
1383 | */ | |
1384 | int kdb_main_loop(kdb_reason_t reason, kdb_reason_t reason2, int error, | |
1385 | kdb_dbtrap_t db_result, struct pt_regs *regs) | |
1386 | { | |
1387 | int result = 1; | |
1388 | /* Stay in kdb() until 'go', 'ss[b]' or an error */ | |
1389 | while (1) { | |
1390 | /* | |
1391 | * All processors except the one that is in control | |
1392 | * will spin here. | |
1393 | */ | |
1394 | KDB_DEBUG_STATE("kdb_main_loop 1", reason); | |
1395 | while (KDB_STATE(HOLD_CPU)) { | |
1396 | /* state KDB is turned off by kdb_cpu to see if the | |
1397 | * other cpus are still live, each cpu in this loop | |
1398 | * turns it back on. | |
1399 | */ | |
1400 | if (!KDB_STATE(KDB)) | |
1401 | KDB_STATE_SET(KDB); | |
1402 | } | |
1403 | ||
1404 | KDB_STATE_CLEAR(SUPPRESS); | |
1405 | KDB_DEBUG_STATE("kdb_main_loop 2", reason); | |
1406 | if (KDB_STATE(LEAVING)) | |
1407 | break; /* Another cpu said 'go' */ | |
1408 | /* Still using kdb, this processor is in control */ | |
1409 | result = kdb_local(reason2, error, regs, db_result); | |
1410 | KDB_DEBUG_STATE("kdb_main_loop 3", result); | |
1411 | ||
1412 | if (result == KDB_CMD_CPU) | |
1413 | break; | |
1414 | ||
1415 | if (result == KDB_CMD_SS) { | |
1416 | KDB_STATE_SET(DOING_SS); | |
1417 | break; | |
1418 | } | |
1419 | ||
5d5314d6 | 1420 | if (result == KDB_CMD_KGDB) { |
d613d828 | 1421 | if (!KDB_STATE(DOING_KGDB)) |
5d5314d6 JW |
1422 | kdb_printf("Entering please attach debugger " |
1423 | "or use $D#44+ or $3#33\n"); | |
1424 | break; | |
1425 | } | |
1426 | if (result && result != 1 && result != KDB_CMD_GO) | |
1427 | kdb_printf("\nUnexpected kdb_local return code %d\n", | |
1428 | result); | |
1429 | KDB_DEBUG_STATE("kdb_main_loop 4", reason); | |
1430 | break; | |
1431 | } | |
1432 | if (KDB_STATE(DOING_SS)) | |
1433 | KDB_STATE_CLEAR(SSBPT); | |
1434 | ||
8f30d411 AW |
1435 | /* Clean up any keyboard devices before leaving */ |
1436 | kdb_kbd_cleanup_state(); | |
1437 | ||
5d5314d6 JW |
1438 | return result; |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * kdb_mdr - This function implements the guts of the 'mdr', memory | |
1443 | * read command. | |
1444 | * mdr <addr arg>,<byte count> | |
1445 | * Inputs: | |
1446 | * addr Start address | |
1447 | * count Number of bytes | |
1448 | * Returns: | |
1449 | * Always 0. Any errors are detected and printed by kdb_getarea. | |
1450 | */ | |
1451 | static int kdb_mdr(unsigned long addr, unsigned int count) | |
1452 | { | |
1453 | unsigned char c; | |
1454 | while (count--) { | |
1455 | if (kdb_getarea(c, addr)) | |
1456 | return 0; | |
1457 | kdb_printf("%02x", c); | |
1458 | addr++; | |
1459 | } | |
1460 | kdb_printf("\n"); | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * kdb_md - This function implements the 'md', 'md1', 'md2', 'md4', | |
1466 | * 'md8' 'mdr' and 'mds' commands. | |
1467 | * | |
1468 | * md|mds [<addr arg> [<line count> [<radix>]]] | |
1469 | * mdWcN [<addr arg> [<line count> [<radix>]]] | |
1470 | * where W = is the width (1, 2, 4 or 8) and N is the count. | |
1471 | * for eg., md1c20 reads 20 bytes, 1 at a time. | |
1472 | * mdr <addr arg>,<byte count> | |
1473 | */ | |
1474 | static void kdb_md_line(const char *fmtstr, unsigned long addr, | |
1475 | int symbolic, int nosect, int bytesperword, | |
1476 | int num, int repeat, int phys) | |
1477 | { | |
1478 | /* print just one line of data */ | |
1479 | kdb_symtab_t symtab; | |
1480 | char cbuf[32]; | |
1481 | char *c = cbuf; | |
1482 | int i; | |
1483 | unsigned long word; | |
1484 | ||
1485 | memset(cbuf, '\0', sizeof(cbuf)); | |
1486 | if (phys) | |
1487 | kdb_printf("phys " kdb_machreg_fmt0 " ", addr); | |
1488 | else | |
1489 | kdb_printf(kdb_machreg_fmt0 " ", addr); | |
1490 | ||
1491 | for (i = 0; i < num && repeat--; i++) { | |
1492 | if (phys) { | |
1493 | if (kdb_getphysword(&word, addr, bytesperword)) | |
1494 | break; | |
1495 | } else if (kdb_getword(&word, addr, bytesperword)) | |
1496 | break; | |
1497 | kdb_printf(fmtstr, word); | |
1498 | if (symbolic) | |
1499 | kdbnearsym(word, &symtab); | |
1500 | else | |
1501 | memset(&symtab, 0, sizeof(symtab)); | |
1502 | if (symtab.sym_name) { | |
1503 | kdb_symbol_print(word, &symtab, 0); | |
1504 | if (!nosect) { | |
1505 | kdb_printf("\n"); | |
1506 | kdb_printf(" %s %s " | |
1507 | kdb_machreg_fmt " " | |
1508 | kdb_machreg_fmt " " | |
1509 | kdb_machreg_fmt, symtab.mod_name, | |
1510 | symtab.sec_name, symtab.sec_start, | |
1511 | symtab.sym_start, symtab.sym_end); | |
1512 | } | |
1513 | addr += bytesperword; | |
1514 | } else { | |
1515 | union { | |
1516 | u64 word; | |
1517 | unsigned char c[8]; | |
1518 | } wc; | |
1519 | unsigned char *cp; | |
1520 | #ifdef __BIG_ENDIAN | |
1521 | cp = wc.c + 8 - bytesperword; | |
1522 | #else | |
1523 | cp = wc.c; | |
1524 | #endif | |
1525 | wc.word = word; | |
1526 | #define printable_char(c) \ | |
1527 | ({unsigned char __c = c; isascii(__c) && isprint(__c) ? __c : '.'; }) | |
1528 | switch (bytesperword) { | |
1529 | case 8: | |
1530 | *c++ = printable_char(*cp++); | |
1531 | *c++ = printable_char(*cp++); | |
1532 | *c++ = printable_char(*cp++); | |
1533 | *c++ = printable_char(*cp++); | |
1534 | addr += 4; | |
1535 | case 4: | |
1536 | *c++ = printable_char(*cp++); | |
1537 | *c++ = printable_char(*cp++); | |
1538 | addr += 2; | |
1539 | case 2: | |
1540 | *c++ = printable_char(*cp++); | |
1541 | addr++; | |
1542 | case 1: | |
1543 | *c++ = printable_char(*cp++); | |
1544 | addr++; | |
1545 | break; | |
1546 | } | |
1547 | #undef printable_char | |
1548 | } | |
1549 | } | |
1550 | kdb_printf("%*s %s\n", (int)((num-i)*(2*bytesperword + 1)+1), | |
1551 | " ", cbuf); | |
1552 | } | |
1553 | ||
1554 | static int kdb_md(int argc, const char **argv) | |
1555 | { | |
1556 | static unsigned long last_addr; | |
1557 | static int last_radix, last_bytesperword, last_repeat; | |
1558 | int radix = 16, mdcount = 8, bytesperword = KDB_WORD_SIZE, repeat; | |
1559 | int nosect = 0; | |
1560 | char fmtchar, fmtstr[64]; | |
1561 | unsigned long addr; | |
1562 | unsigned long word; | |
1563 | long offset = 0; | |
1564 | int symbolic = 0; | |
1565 | int valid = 0; | |
1566 | int phys = 0; | |
1567 | ||
1568 | kdbgetintenv("MDCOUNT", &mdcount); | |
1569 | kdbgetintenv("RADIX", &radix); | |
1570 | kdbgetintenv("BYTESPERWORD", &bytesperword); | |
1571 | ||
1572 | /* Assume 'md <addr>' and start with environment values */ | |
1573 | repeat = mdcount * 16 / bytesperword; | |
1574 | ||
1575 | if (strcmp(argv[0], "mdr") == 0) { | |
1576 | if (argc != 2) | |
1577 | return KDB_ARGCOUNT; | |
1578 | valid = 1; | |
1579 | } else if (isdigit(argv[0][2])) { | |
1580 | bytesperword = (int)(argv[0][2] - '0'); | |
1581 | if (bytesperword == 0) { | |
1582 | bytesperword = last_bytesperword; | |
1583 | if (bytesperword == 0) | |
1584 | bytesperword = 4; | |
1585 | } | |
1586 | last_bytesperword = bytesperword; | |
1587 | repeat = mdcount * 16 / bytesperword; | |
1588 | if (!argv[0][3]) | |
1589 | valid = 1; | |
1590 | else if (argv[0][3] == 'c' && argv[0][4]) { | |
1591 | char *p; | |
1592 | repeat = simple_strtoul(argv[0] + 4, &p, 10); | |
1593 | mdcount = ((repeat * bytesperword) + 15) / 16; | |
1594 | valid = !*p; | |
1595 | } | |
1596 | last_repeat = repeat; | |
1597 | } else if (strcmp(argv[0], "md") == 0) | |
1598 | valid = 1; | |
1599 | else if (strcmp(argv[0], "mds") == 0) | |
1600 | valid = 1; | |
1601 | else if (strcmp(argv[0], "mdp") == 0) { | |
1602 | phys = valid = 1; | |
1603 | } | |
1604 | if (!valid) | |
1605 | return KDB_NOTFOUND; | |
1606 | ||
1607 | if (argc == 0) { | |
1608 | if (last_addr == 0) | |
1609 | return KDB_ARGCOUNT; | |
1610 | addr = last_addr; | |
1611 | radix = last_radix; | |
1612 | bytesperword = last_bytesperword; | |
1613 | repeat = last_repeat; | |
1614 | mdcount = ((repeat * bytesperword) + 15) / 16; | |
1615 | } | |
1616 | ||
1617 | if (argc) { | |
1618 | unsigned long val; | |
1619 | int diag, nextarg = 1; | |
1620 | diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, | |
1621 | &offset, NULL); | |
1622 | if (diag) | |
1623 | return diag; | |
1624 | if (argc > nextarg+2) | |
1625 | return KDB_ARGCOUNT; | |
1626 | ||
1627 | if (argc >= nextarg) { | |
1628 | diag = kdbgetularg(argv[nextarg], &val); | |
1629 | if (!diag) { | |
1630 | mdcount = (int) val; | |
1631 | repeat = mdcount * 16 / bytesperword; | |
1632 | } | |
1633 | } | |
1634 | if (argc >= nextarg+1) { | |
1635 | diag = kdbgetularg(argv[nextarg+1], &val); | |
1636 | if (!diag) | |
1637 | radix = (int) val; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | if (strcmp(argv[0], "mdr") == 0) | |
1642 | return kdb_mdr(addr, mdcount); | |
1643 | ||
1644 | switch (radix) { | |
1645 | case 10: | |
1646 | fmtchar = 'd'; | |
1647 | break; | |
1648 | case 16: | |
1649 | fmtchar = 'x'; | |
1650 | break; | |
1651 | case 8: | |
1652 | fmtchar = 'o'; | |
1653 | break; | |
1654 | default: | |
1655 | return KDB_BADRADIX; | |
1656 | } | |
1657 | ||
1658 | last_radix = radix; | |
1659 | ||
1660 | if (bytesperword > KDB_WORD_SIZE) | |
1661 | return KDB_BADWIDTH; | |
1662 | ||
1663 | switch (bytesperword) { | |
1664 | case 8: | |
1665 | sprintf(fmtstr, "%%16.16l%c ", fmtchar); | |
1666 | break; | |
1667 | case 4: | |
1668 | sprintf(fmtstr, "%%8.8l%c ", fmtchar); | |
1669 | break; | |
1670 | case 2: | |
1671 | sprintf(fmtstr, "%%4.4l%c ", fmtchar); | |
1672 | break; | |
1673 | case 1: | |
1674 | sprintf(fmtstr, "%%2.2l%c ", fmtchar); | |
1675 | break; | |
1676 | default: | |
1677 | return KDB_BADWIDTH; | |
1678 | } | |
1679 | ||
1680 | last_repeat = repeat; | |
1681 | last_bytesperword = bytesperword; | |
1682 | ||
1683 | if (strcmp(argv[0], "mds") == 0) { | |
1684 | symbolic = 1; | |
1685 | /* Do not save these changes as last_*, they are temporary mds | |
1686 | * overrides. | |
1687 | */ | |
1688 | bytesperword = KDB_WORD_SIZE; | |
1689 | repeat = mdcount; | |
1690 | kdbgetintenv("NOSECT", &nosect); | |
1691 | } | |
1692 | ||
1693 | /* Round address down modulo BYTESPERWORD */ | |
1694 | ||
1695 | addr &= ~(bytesperword-1); | |
1696 | ||
1697 | while (repeat > 0) { | |
1698 | unsigned long a; | |
1699 | int n, z, num = (symbolic ? 1 : (16 / bytesperword)); | |
1700 | ||
1701 | if (KDB_FLAG(CMD_INTERRUPT)) | |
1702 | return 0; | |
1703 | for (a = addr, z = 0; z < repeat; a += bytesperword, ++z) { | |
1704 | if (phys) { | |
1705 | if (kdb_getphysword(&word, a, bytesperword) | |
1706 | || word) | |
1707 | break; | |
1708 | } else if (kdb_getword(&word, a, bytesperword) || word) | |
1709 | break; | |
1710 | } | |
1711 | n = min(num, repeat); | |
1712 | kdb_md_line(fmtstr, addr, symbolic, nosect, bytesperword, | |
1713 | num, repeat, phys); | |
1714 | addr += bytesperword * n; | |
1715 | repeat -= n; | |
1716 | z = (z + num - 1) / num; | |
1717 | if (z > 2) { | |
1718 | int s = num * (z-2); | |
1719 | kdb_printf(kdb_machreg_fmt0 "-" kdb_machreg_fmt0 | |
1720 | " zero suppressed\n", | |
1721 | addr, addr + bytesperword * s - 1); | |
1722 | addr += bytesperword * s; | |
1723 | repeat -= s; | |
1724 | } | |
1725 | } | |
1726 | last_addr = addr; | |
1727 | ||
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * kdb_mm - This function implements the 'mm' command. | |
1733 | * mm address-expression new-value | |
1734 | * Remarks: | |
1735 | * mm works on machine words, mmW works on bytes. | |
1736 | */ | |
1737 | static int kdb_mm(int argc, const char **argv) | |
1738 | { | |
1739 | int diag; | |
1740 | unsigned long addr; | |
1741 | long offset = 0; | |
1742 | unsigned long contents; | |
1743 | int nextarg; | |
1744 | int width; | |
1745 | ||
1746 | if (argv[0][2] && !isdigit(argv[0][2])) | |
1747 | return KDB_NOTFOUND; | |
1748 | ||
1749 | if (argc < 2) | |
1750 | return KDB_ARGCOUNT; | |
1751 | ||
1752 | nextarg = 1; | |
1753 | diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL); | |
1754 | if (diag) | |
1755 | return diag; | |
1756 | ||
1757 | if (nextarg > argc) | |
1758 | return KDB_ARGCOUNT; | |
1759 | diag = kdbgetaddrarg(argc, argv, &nextarg, &contents, NULL, NULL); | |
1760 | if (diag) | |
1761 | return diag; | |
1762 | ||
1763 | if (nextarg != argc + 1) | |
1764 | return KDB_ARGCOUNT; | |
1765 | ||
1766 | width = argv[0][2] ? (argv[0][2] - '0') : (KDB_WORD_SIZE); | |
1767 | diag = kdb_putword(addr, contents, width); | |
1768 | if (diag) | |
1769 | return diag; | |
1770 | ||
1771 | kdb_printf(kdb_machreg_fmt " = " kdb_machreg_fmt "\n", addr, contents); | |
1772 | ||
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | /* | |
1777 | * kdb_go - This function implements the 'go' command. | |
1778 | * go [address-expression] | |
1779 | */ | |
1780 | static int kdb_go(int argc, const char **argv) | |
1781 | { | |
1782 | unsigned long addr; | |
1783 | int diag; | |
1784 | int nextarg; | |
1785 | long offset; | |
1786 | ||
495363d3 JW |
1787 | if (raw_smp_processor_id() != kdb_initial_cpu) { |
1788 | kdb_printf("go must execute on the entry cpu, " | |
1789 | "please use \"cpu %d\" and then execute go\n", | |
1790 | kdb_initial_cpu); | |
1791 | return KDB_BADCPUNUM; | |
1792 | } | |
5d5314d6 | 1793 | if (argc == 1) { |
5d5314d6 JW |
1794 | nextarg = 1; |
1795 | diag = kdbgetaddrarg(argc, argv, &nextarg, | |
1796 | &addr, &offset, NULL); | |
1797 | if (diag) | |
1798 | return diag; | |
1799 | } else if (argc) { | |
1800 | return KDB_ARGCOUNT; | |
1801 | } | |
1802 | ||
1803 | diag = KDB_CMD_GO; | |
1804 | if (KDB_FLAG(CATASTROPHIC)) { | |
1805 | kdb_printf("Catastrophic error detected\n"); | |
1806 | kdb_printf("kdb_continue_catastrophic=%d, ", | |
1807 | kdb_continue_catastrophic); | |
1808 | if (kdb_continue_catastrophic == 0 && kdb_go_count++ == 0) { | |
1809 | kdb_printf("type go a second time if you really want " | |
1810 | "to continue\n"); | |
1811 | return 0; | |
1812 | } | |
1813 | if (kdb_continue_catastrophic == 2) { | |
1814 | kdb_printf("forcing reboot\n"); | |
1815 | kdb_reboot(0, NULL); | |
1816 | } | |
1817 | kdb_printf("attempting to continue\n"); | |
1818 | } | |
1819 | return diag; | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * kdb_rd - This function implements the 'rd' command. | |
1824 | */ | |
1825 | static int kdb_rd(int argc, const char **argv) | |
1826 | { | |
534af108 JW |
1827 | int len = kdb_check_regs(); |
1828 | #if DBG_MAX_REG_NUM > 0 | |
1829 | int i; | |
1830 | char *rname; | |
1831 | int rsize; | |
1832 | u64 reg64; | |
1833 | u32 reg32; | |
1834 | u16 reg16; | |
1835 | u8 reg8; | |
1836 | ||
1837 | if (len) | |
1838 | return len; | |
1839 | ||
1840 | for (i = 0; i < DBG_MAX_REG_NUM; i++) { | |
1841 | rsize = dbg_reg_def[i].size * 2; | |
1842 | if (rsize > 16) | |
1843 | rsize = 2; | |
1844 | if (len + strlen(dbg_reg_def[i].name) + 4 + rsize > 80) { | |
1845 | len = 0; | |
1846 | kdb_printf("\n"); | |
1847 | } | |
1848 | if (len) | |
1849 | len += kdb_printf(" "); | |
1850 | switch(dbg_reg_def[i].size * 8) { | |
1851 | case 8: | |
1852 | rname = dbg_get_reg(i, ®8, kdb_current_regs); | |
1853 | if (!rname) | |
1854 | break; | |
1855 | len += kdb_printf("%s: %02x", rname, reg8); | |
1856 | break; | |
1857 | case 16: | |
1858 | rname = dbg_get_reg(i, ®16, kdb_current_regs); | |
1859 | if (!rname) | |
1860 | break; | |
1861 | len += kdb_printf("%s: %04x", rname, reg16); | |
1862 | break; | |
1863 | case 32: | |
1864 | rname = dbg_get_reg(i, ®32, kdb_current_regs); | |
1865 | if (!rname) | |
1866 | break; | |
1867 | len += kdb_printf("%s: %08x", rname, reg32); | |
1868 | break; | |
1869 | case 64: | |
1870 | rname = dbg_get_reg(i, ®64, kdb_current_regs); | |
1871 | if (!rname) | |
1872 | break; | |
1873 | len += kdb_printf("%s: %016llx", rname, reg64); | |
1874 | break; | |
1875 | default: | |
1876 | len += kdb_printf("%s: ??", dbg_reg_def[i].name); | |
1877 | } | |
1878 | } | |
1879 | kdb_printf("\n"); | |
1880 | #else | |
1881 | if (len) | |
1882 | return len; | |
5d5314d6 JW |
1883 | |
1884 | kdb_dumpregs(kdb_current_regs); | |
534af108 | 1885 | #endif |
5d5314d6 JW |
1886 | return 0; |
1887 | } | |
1888 | ||
1889 | /* | |
1890 | * kdb_rm - This function implements the 'rm' (register modify) command. | |
1891 | * rm register-name new-contents | |
1892 | * Remarks: | |
534af108 | 1893 | * Allows register modification with the same restrictions as gdb |
5d5314d6 JW |
1894 | */ |
1895 | static int kdb_rm(int argc, const char **argv) | |
1896 | { | |
534af108 | 1897 | #if DBG_MAX_REG_NUM > 0 |
5d5314d6 | 1898 | int diag; |
534af108 JW |
1899 | const char *rname; |
1900 | int i; | |
1901 | u64 reg64; | |
1902 | u32 reg32; | |
1903 | u16 reg16; | |
1904 | u8 reg8; | |
5d5314d6 JW |
1905 | |
1906 | if (argc != 2) | |
1907 | return KDB_ARGCOUNT; | |
1908 | /* | |
1909 | * Allow presence or absence of leading '%' symbol. | |
1910 | */ | |
534af108 JW |
1911 | rname = argv[1]; |
1912 | if (*rname == '%') | |
1913 | rname++; | |
5d5314d6 | 1914 | |
534af108 | 1915 | diag = kdbgetu64arg(argv[2], ®64); |
5d5314d6 JW |
1916 | if (diag) |
1917 | return diag; | |
1918 | ||
1919 | diag = kdb_check_regs(); | |
1920 | if (diag) | |
1921 | return diag; | |
534af108 JW |
1922 | |
1923 | diag = KDB_BADREG; | |
1924 | for (i = 0; i < DBG_MAX_REG_NUM; i++) { | |
1925 | if (strcmp(rname, dbg_reg_def[i].name) == 0) { | |
1926 | diag = 0; | |
1927 | break; | |
1928 | } | |
1929 | } | |
1930 | if (!diag) { | |
1931 | switch(dbg_reg_def[i].size * 8) { | |
1932 | case 8: | |
1933 | reg8 = reg64; | |
1934 | dbg_set_reg(i, ®8, kdb_current_regs); | |
1935 | break; | |
1936 | case 16: | |
1937 | reg16 = reg64; | |
1938 | dbg_set_reg(i, ®16, kdb_current_regs); | |
1939 | break; | |
1940 | case 32: | |
1941 | reg32 = reg64; | |
1942 | dbg_set_reg(i, ®32, kdb_current_regs); | |
1943 | break; | |
1944 | case 64: | |
1945 | dbg_set_reg(i, ®64, kdb_current_regs); | |
1946 | break; | |
1947 | } | |
1948 | } | |
1949 | return diag; | |
1950 | #else | |
5d5314d6 | 1951 | kdb_printf("ERROR: Register set currently not implemented\n"); |
534af108 JW |
1952 | return 0; |
1953 | #endif | |
5d5314d6 JW |
1954 | } |
1955 | ||
1956 | #if defined(CONFIG_MAGIC_SYSRQ) | |
1957 | /* | |
1958 | * kdb_sr - This function implements the 'sr' (SYSRQ key) command | |
1959 | * which interfaces to the soi-disant MAGIC SYSRQ functionality. | |
1960 | * sr <magic-sysrq-code> | |
1961 | */ | |
1962 | static int kdb_sr(int argc, const char **argv) | |
1963 | { | |
420c2b1b AV |
1964 | bool check_mask = |
1965 | !kdb_check_flags(KDB_ENABLE_ALL, kdb_cmd_enabled, false); | |
1966 | ||
5d5314d6 JW |
1967 | if (argc != 1) |
1968 | return KDB_ARGCOUNT; | |
420c2b1b | 1969 | |
d37d39ae | 1970 | kdb_trap_printk++; |
420c2b1b | 1971 | __handle_sysrq(*argv[1], check_mask); |
d37d39ae | 1972 | kdb_trap_printk--; |
5d5314d6 JW |
1973 | |
1974 | return 0; | |
1975 | } | |
1976 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
1977 | ||
1978 | /* | |
1979 | * kdb_ef - This function implements the 'regs' (display exception | |
1980 | * frame) command. This command takes an address and expects to | |
1981 | * find an exception frame at that address, formats and prints | |
1982 | * it. | |
1983 | * regs address-expression | |
1984 | * Remarks: | |
1985 | * Not done yet. | |
1986 | */ | |
1987 | static int kdb_ef(int argc, const char **argv) | |
1988 | { | |
1989 | int diag; | |
1990 | unsigned long addr; | |
1991 | long offset; | |
1992 | int nextarg; | |
1993 | ||
1994 | if (argc != 1) | |
1995 | return KDB_ARGCOUNT; | |
1996 | ||
1997 | nextarg = 1; | |
1998 | diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL); | |
1999 | if (diag) | |
2000 | return diag; | |
2001 | show_regs((struct pt_regs *)addr); | |
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | #if defined(CONFIG_MODULES) | |
5d5314d6 JW |
2006 | /* |
2007 | * kdb_lsmod - This function implements the 'lsmod' command. Lists | |
2008 | * currently loaded kernel modules. | |
2009 | * Mostly taken from userland lsmod. | |
2010 | */ | |
2011 | static int kdb_lsmod(int argc, const char **argv) | |
2012 | { | |
2013 | struct module *mod; | |
2014 | ||
2015 | if (argc != 0) | |
2016 | return KDB_ARGCOUNT; | |
2017 | ||
2018 | kdb_printf("Module Size modstruct Used by\n"); | |
2019 | list_for_each_entry(mod, kdb_modules, list) { | |
0d21b0e3 RR |
2020 | if (mod->state == MODULE_STATE_UNFORMED) |
2021 | continue; | |
5d5314d6 JW |
2022 | |
2023 | kdb_printf("%-20s%8u 0x%p ", mod->name, | |
2024 | mod->core_size, (void *)mod); | |
2025 | #ifdef CONFIG_MODULE_UNLOAD | |
bd77c047 | 2026 | kdb_printf("%4ld ", module_refcount(mod)); |
5d5314d6 JW |
2027 | #endif |
2028 | if (mod->state == MODULE_STATE_GOING) | |
2029 | kdb_printf(" (Unloading)"); | |
2030 | else if (mod->state == MODULE_STATE_COMING) | |
2031 | kdb_printf(" (Loading)"); | |
2032 | else | |
2033 | kdb_printf(" (Live)"); | |
9e8b624f | 2034 | kdb_printf(" 0x%p", mod->module_core); |
5d5314d6 JW |
2035 | |
2036 | #ifdef CONFIG_MODULE_UNLOAD | |
2037 | { | |
2038 | struct module_use *use; | |
2039 | kdb_printf(" [ "); | |
c8e21ced RR |
2040 | list_for_each_entry(use, &mod->source_list, |
2041 | source_list) | |
2042 | kdb_printf("%s ", use->target->name); | |
5d5314d6 JW |
2043 | kdb_printf("]\n"); |
2044 | } | |
2045 | #endif | |
2046 | } | |
2047 | ||
2048 | return 0; | |
2049 | } | |
2050 | ||
2051 | #endif /* CONFIG_MODULES */ | |
2052 | ||
2053 | /* | |
2054 | * kdb_env - This function implements the 'env' command. Display the | |
2055 | * current environment variables. | |
2056 | */ | |
2057 | ||
2058 | static int kdb_env(int argc, const char **argv) | |
2059 | { | |
2060 | int i; | |
2061 | ||
2062 | for (i = 0; i < __nenv; i++) { | |
2063 | if (__env[i]) | |
2064 | kdb_printf("%s\n", __env[i]); | |
2065 | } | |
2066 | ||
2067 | if (KDB_DEBUG(MASK)) | |
2068 | kdb_printf("KDBFLAGS=0x%x\n", kdb_flags); | |
2069 | ||
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | #ifdef CONFIG_PRINTK | |
2074 | /* | |
2075 | * kdb_dmesg - This function implements the 'dmesg' command to display | |
2076 | * the contents of the syslog buffer. | |
2077 | * dmesg [lines] [adjust] | |
2078 | */ | |
2079 | static int kdb_dmesg(int argc, const char **argv) | |
2080 | { | |
bc792e61 AV |
2081 | int diag; |
2082 | int logging; | |
2083 | int lines = 0; | |
2084 | int adjust = 0; | |
2085 | int n = 0; | |
2086 | int skip = 0; | |
2087 | struct kmsg_dumper dumper = { .active = 1 }; | |
2088 | size_t len; | |
2089 | char buf[201]; | |
5d5314d6 JW |
2090 | |
2091 | if (argc > 2) | |
2092 | return KDB_ARGCOUNT; | |
2093 | if (argc) { | |
2094 | char *cp; | |
2095 | lines = simple_strtol(argv[1], &cp, 0); | |
2096 | if (*cp) | |
2097 | lines = 0; | |
2098 | if (argc > 1) { | |
2099 | adjust = simple_strtoul(argv[2], &cp, 0); | |
2100 | if (*cp || adjust < 0) | |
2101 | adjust = 0; | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | /* disable LOGGING if set */ | |
2106 | diag = kdbgetintenv("LOGGING", &logging); | |
2107 | if (!diag && logging) { | |
2108 | const char *setargs[] = { "set", "LOGGING", "0" }; | |
2109 | kdb_set(2, setargs); | |
2110 | } | |
2111 | ||
c064da47 AV |
2112 | kmsg_dump_rewind_nolock(&dumper); |
2113 | while (kmsg_dump_get_line_nolock(&dumper, 1, NULL, 0, NULL)) | |
bc792e61 AV |
2114 | n++; |
2115 | ||
5d5314d6 JW |
2116 | if (lines < 0) { |
2117 | if (adjust >= n) | |
2118 | kdb_printf("buffer only contains %d lines, nothing " | |
2119 | "printed\n", n); | |
2120 | else if (adjust - lines >= n) | |
2121 | kdb_printf("buffer only contains %d lines, last %d " | |
2122 | "lines printed\n", n, n - adjust); | |
bc792e61 AV |
2123 | skip = adjust; |
2124 | lines = abs(lines); | |
5d5314d6 | 2125 | } else if (lines > 0) { |
bc792e61 AV |
2126 | skip = n - lines - adjust; |
2127 | lines = abs(lines); | |
5d5314d6 JW |
2128 | if (adjust >= n) { |
2129 | kdb_printf("buffer only contains %d lines, " | |
2130 | "nothing printed\n", n); | |
2131 | skip = n; | |
2132 | } else if (skip < 0) { | |
2133 | lines += skip; | |
2134 | skip = 0; | |
2135 | kdb_printf("buffer only contains %d lines, first " | |
2136 | "%d lines printed\n", n, lines); | |
2137 | } | |
bc792e61 AV |
2138 | } else { |
2139 | lines = n; | |
5d5314d6 | 2140 | } |
bc792e61 AV |
2141 | |
2142 | if (skip >= n || skip < 0) | |
2143 | return 0; | |
2144 | ||
c064da47 AV |
2145 | kmsg_dump_rewind_nolock(&dumper); |
2146 | while (kmsg_dump_get_line_nolock(&dumper, 1, buf, sizeof(buf), &len)) { | |
bc792e61 AV |
2147 | if (skip) { |
2148 | skip--; | |
2149 | continue; | |
5d5314d6 | 2150 | } |
bc792e61 AV |
2151 | if (!lines--) |
2152 | break; | |
d1871b38 JW |
2153 | if (KDB_FLAG(CMD_INTERRUPT)) |
2154 | return 0; | |
bc792e61 AV |
2155 | |
2156 | kdb_printf("%.*s\n", (int)len - 1, buf); | |
5d5314d6 | 2157 | } |
5d5314d6 JW |
2158 | |
2159 | return 0; | |
2160 | } | |
2161 | #endif /* CONFIG_PRINTK */ | |
ad394f66 AV |
2162 | |
2163 | /* Make sure we balance enable/disable calls, must disable first. */ | |
2164 | static atomic_t kdb_nmi_disabled; | |
2165 | ||
2166 | static int kdb_disable_nmi(int argc, const char *argv[]) | |
2167 | { | |
2168 | if (atomic_read(&kdb_nmi_disabled)) | |
2169 | return 0; | |
2170 | atomic_set(&kdb_nmi_disabled, 1); | |
2171 | arch_kgdb_ops.enable_nmi(0); | |
2172 | return 0; | |
2173 | } | |
2174 | ||
2175 | static int kdb_param_enable_nmi(const char *val, const struct kernel_param *kp) | |
2176 | { | |
2177 | if (!atomic_add_unless(&kdb_nmi_disabled, -1, 0)) | |
2178 | return -EINVAL; | |
2179 | arch_kgdb_ops.enable_nmi(1); | |
2180 | return 0; | |
2181 | } | |
2182 | ||
2183 | static const struct kernel_param_ops kdb_param_ops_enable_nmi = { | |
2184 | .set = kdb_param_enable_nmi, | |
2185 | }; | |
2186 | module_param_cb(enable_nmi, &kdb_param_ops_enable_nmi, NULL, 0600); | |
2187 | ||
5d5314d6 JW |
2188 | /* |
2189 | * kdb_cpu - This function implements the 'cpu' command. | |
2190 | * cpu [<cpunum>] | |
2191 | * Returns: | |
2192 | * KDB_CMD_CPU for success, a kdb diagnostic if error | |
2193 | */ | |
2194 | static void kdb_cpu_status(void) | |
2195 | { | |
2196 | int i, start_cpu, first_print = 1; | |
2197 | char state, prev_state = '?'; | |
2198 | ||
2199 | kdb_printf("Currently on cpu %d\n", raw_smp_processor_id()); | |
2200 | kdb_printf("Available cpus: "); | |
2201 | for (start_cpu = -1, i = 0; i < NR_CPUS; i++) { | |
2202 | if (!cpu_online(i)) { | |
2203 | state = 'F'; /* cpu is offline */ | |
2204 | } else { | |
2205 | state = ' '; /* cpu is responding to kdb */ | |
2206 | if (kdb_task_state_char(KDB_TSK(i)) == 'I') | |
2207 | state = 'I'; /* idle task */ | |
2208 | } | |
2209 | if (state != prev_state) { | |
2210 | if (prev_state != '?') { | |
2211 | if (!first_print) | |
2212 | kdb_printf(", "); | |
2213 | first_print = 0; | |
2214 | kdb_printf("%d", start_cpu); | |
2215 | if (start_cpu < i-1) | |
2216 | kdb_printf("-%d", i-1); | |
2217 | if (prev_state != ' ') | |
2218 | kdb_printf("(%c)", prev_state); | |
2219 | } | |
2220 | prev_state = state; | |
2221 | start_cpu = i; | |
2222 | } | |
2223 | } | |
2224 | /* print the trailing cpus, ignoring them if they are all offline */ | |
2225 | if (prev_state != 'F') { | |
2226 | if (!first_print) | |
2227 | kdb_printf(", "); | |
2228 | kdb_printf("%d", start_cpu); | |
2229 | if (start_cpu < i-1) | |
2230 | kdb_printf("-%d", i-1); | |
2231 | if (prev_state != ' ') | |
2232 | kdb_printf("(%c)", prev_state); | |
2233 | } | |
2234 | kdb_printf("\n"); | |
2235 | } | |
2236 | ||
2237 | static int kdb_cpu(int argc, const char **argv) | |
2238 | { | |
2239 | unsigned long cpunum; | |
2240 | int diag; | |
2241 | ||
2242 | if (argc == 0) { | |
2243 | kdb_cpu_status(); | |
2244 | return 0; | |
2245 | } | |
2246 | ||
2247 | if (argc != 1) | |
2248 | return KDB_ARGCOUNT; | |
2249 | ||
2250 | diag = kdbgetularg(argv[1], &cpunum); | |
2251 | if (diag) | |
2252 | return diag; | |
2253 | ||
2254 | /* | |
2255 | * Validate cpunum | |
2256 | */ | |
2257 | if ((cpunum > NR_CPUS) || !cpu_online(cpunum)) | |
2258 | return KDB_BADCPUNUM; | |
2259 | ||
2260 | dbg_switch_cpu = cpunum; | |
2261 | ||
2262 | /* | |
2263 | * Switch to other cpu | |
2264 | */ | |
2265 | return KDB_CMD_CPU; | |
2266 | } | |
2267 | ||
2268 | /* The user may not realize that ps/bta with no parameters does not print idle | |
2269 | * or sleeping system daemon processes, so tell them how many were suppressed. | |
2270 | */ | |
2271 | void kdb_ps_suppressed(void) | |
2272 | { | |
2273 | int idle = 0, daemon = 0; | |
2274 | unsigned long mask_I = kdb_task_state_string("I"), | |
2275 | mask_M = kdb_task_state_string("M"); | |
2276 | unsigned long cpu; | |
2277 | const struct task_struct *p, *g; | |
2278 | for_each_online_cpu(cpu) { | |
2279 | p = kdb_curr_task(cpu); | |
2280 | if (kdb_task_state(p, mask_I)) | |
2281 | ++idle; | |
2282 | } | |
2283 | kdb_do_each_thread(g, p) { | |
2284 | if (kdb_task_state(p, mask_M)) | |
2285 | ++daemon; | |
2286 | } kdb_while_each_thread(g, p); | |
2287 | if (idle || daemon) { | |
2288 | if (idle) | |
2289 | kdb_printf("%d idle process%s (state I)%s\n", | |
2290 | idle, idle == 1 ? "" : "es", | |
2291 | daemon ? " and " : ""); | |
2292 | if (daemon) | |
2293 | kdb_printf("%d sleeping system daemon (state M) " | |
2294 | "process%s", daemon, | |
2295 | daemon == 1 ? "" : "es"); | |
2296 | kdb_printf(" suppressed,\nuse 'ps A' to see all.\n"); | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | * kdb_ps - This function implements the 'ps' command which shows a | |
2302 | * list of the active processes. | |
2303 | * ps [DRSTCZEUIMA] All processes, optionally filtered by state | |
2304 | */ | |
2305 | void kdb_ps1(const struct task_struct *p) | |
2306 | { | |
2307 | int cpu; | |
2308 | unsigned long tmp; | |
2309 | ||
2310 | if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long))) | |
2311 | return; | |
2312 | ||
2313 | cpu = kdb_process_cpu(p); | |
2314 | kdb_printf("0x%p %8d %8d %d %4d %c 0x%p %c%s\n", | |
2315 | (void *)p, p->pid, p->parent->pid, | |
2316 | kdb_task_has_cpu(p), kdb_process_cpu(p), | |
2317 | kdb_task_state_char(p), | |
2318 | (void *)(&p->thread), | |
2319 | p == kdb_curr_task(raw_smp_processor_id()) ? '*' : ' ', | |
2320 | p->comm); | |
2321 | if (kdb_task_has_cpu(p)) { | |
2322 | if (!KDB_TSK(cpu)) { | |
2323 | kdb_printf(" Error: no saved data for this cpu\n"); | |
2324 | } else { | |
2325 | if (KDB_TSK(cpu) != p) | |
2326 | kdb_printf(" Error: does not match running " | |
2327 | "process table (0x%p)\n", KDB_TSK(cpu)); | |
2328 | } | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | static int kdb_ps(int argc, const char **argv) | |
2333 | { | |
2334 | struct task_struct *g, *p; | |
2335 | unsigned long mask, cpu; | |
2336 | ||
2337 | if (argc == 0) | |
2338 | kdb_ps_suppressed(); | |
2339 | kdb_printf("%-*s Pid Parent [*] cpu State %-*s Command\n", | |
2340 | (int)(2*sizeof(void *))+2, "Task Addr", | |
2341 | (int)(2*sizeof(void *))+2, "Thread"); | |
2342 | mask = kdb_task_state_string(argc ? argv[1] : NULL); | |
2343 | /* Run the active tasks first */ | |
2344 | for_each_online_cpu(cpu) { | |
2345 | if (KDB_FLAG(CMD_INTERRUPT)) | |
2346 | return 0; | |
2347 | p = kdb_curr_task(cpu); | |
2348 | if (kdb_task_state(p, mask)) | |
2349 | kdb_ps1(p); | |
2350 | } | |
2351 | kdb_printf("\n"); | |
2352 | /* Now the real tasks */ | |
2353 | kdb_do_each_thread(g, p) { | |
2354 | if (KDB_FLAG(CMD_INTERRUPT)) | |
2355 | return 0; | |
2356 | if (kdb_task_state(p, mask)) | |
2357 | kdb_ps1(p); | |
2358 | } kdb_while_each_thread(g, p); | |
2359 | ||
2360 | return 0; | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * kdb_pid - This function implements the 'pid' command which switches | |
2365 | * the currently active process. | |
2366 | * pid [<pid> | R] | |
2367 | */ | |
2368 | static int kdb_pid(int argc, const char **argv) | |
2369 | { | |
2370 | struct task_struct *p; | |
2371 | unsigned long val; | |
2372 | int diag; | |
2373 | ||
2374 | if (argc > 1) | |
2375 | return KDB_ARGCOUNT; | |
2376 | ||
2377 | if (argc) { | |
2378 | if (strcmp(argv[1], "R") == 0) { | |
2379 | p = KDB_TSK(kdb_initial_cpu); | |
2380 | } else { | |
2381 | diag = kdbgetularg(argv[1], &val); | |
2382 | if (diag) | |
2383 | return KDB_BADINT; | |
2384 | ||
2385 | p = find_task_by_pid_ns((pid_t)val, &init_pid_ns); | |
2386 | if (!p) { | |
2387 | kdb_printf("No task with pid=%d\n", (pid_t)val); | |
2388 | return 0; | |
2389 | } | |
2390 | } | |
2391 | kdb_set_current_task(p); | |
2392 | } | |
2393 | kdb_printf("KDB current process is %s(pid=%d)\n", | |
2394 | kdb_current_task->comm, | |
2395 | kdb_current_task->pid); | |
2396 | ||
2397 | return 0; | |
2398 | } | |
2399 | ||
5d5314d6 JW |
2400 | static int kdb_kgdb(int argc, const char **argv) |
2401 | { | |
2402 | return KDB_CMD_KGDB; | |
2403 | } | |
2404 | ||
2405 | /* | |
2406 | * kdb_help - This function implements the 'help' and '?' commands. | |
2407 | */ | |
2408 | static int kdb_help(int argc, const char **argv) | |
2409 | { | |
2410 | kdbtab_t *kt; | |
2411 | int i; | |
2412 | ||
2413 | kdb_printf("%-15.15s %-20.20s %s\n", "Command", "Usage", "Description"); | |
2414 | kdb_printf("-----------------------------" | |
2415 | "-----------------------------\n"); | |
2416 | for_each_kdbcmd(kt, i) { | |
074604af | 2417 | char *space = ""; |
5d5314d6 JW |
2418 | if (KDB_FLAG(CMD_INTERRUPT)) |
2419 | return 0; | |
074604af JW |
2420 | if (!kt->cmd_name) |
2421 | continue; | |
420c2b1b AV |
2422 | if (!kdb_check_flags(kt->cmd_flags, kdb_cmd_enabled, true)) |
2423 | continue; | |
074604af JW |
2424 | if (strlen(kt->cmd_usage) > 20) |
2425 | space = "\n "; | |
2426 | kdb_printf("%-15.15s %-20s%s%s\n", kt->cmd_name, | |
2427 | kt->cmd_usage, space, kt->cmd_help); | |
5d5314d6 JW |
2428 | } |
2429 | return 0; | |
2430 | } | |
2431 | ||
2432 | /* | |
2433 | * kdb_kill - This function implements the 'kill' commands. | |
2434 | */ | |
2435 | static int kdb_kill(int argc, const char **argv) | |
2436 | { | |
2437 | long sig, pid; | |
2438 | char *endp; | |
2439 | struct task_struct *p; | |
2440 | struct siginfo info; | |
2441 | ||
2442 | if (argc != 2) | |
2443 | return KDB_ARGCOUNT; | |
2444 | ||
2445 | sig = simple_strtol(argv[1], &endp, 0); | |
2446 | if (*endp) | |
2447 | return KDB_BADINT; | |
2448 | if (sig >= 0) { | |
2449 | kdb_printf("Invalid signal parameter.<-signal>\n"); | |
2450 | return 0; | |
2451 | } | |
2452 | sig = -sig; | |
2453 | ||
2454 | pid = simple_strtol(argv[2], &endp, 0); | |
2455 | if (*endp) | |
2456 | return KDB_BADINT; | |
2457 | if (pid <= 0) { | |
2458 | kdb_printf("Process ID must be large than 0.\n"); | |
2459 | return 0; | |
2460 | } | |
2461 | ||
2462 | /* Find the process. */ | |
2463 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
2464 | if (!p) { | |
2465 | kdb_printf("The specified process isn't found.\n"); | |
2466 | return 0; | |
2467 | } | |
2468 | p = p->group_leader; | |
2469 | info.si_signo = sig; | |
2470 | info.si_errno = 0; | |
2471 | info.si_code = SI_USER; | |
2472 | info.si_pid = pid; /* same capabilities as process being signalled */ | |
2473 | info.si_uid = 0; /* kdb has root authority */ | |
2474 | kdb_send_sig_info(p, &info); | |
2475 | return 0; | |
2476 | } | |
2477 | ||
2478 | struct kdb_tm { | |
2479 | int tm_sec; /* seconds */ | |
2480 | int tm_min; /* minutes */ | |
2481 | int tm_hour; /* hours */ | |
2482 | int tm_mday; /* day of the month */ | |
2483 | int tm_mon; /* month */ | |
2484 | int tm_year; /* year */ | |
2485 | }; | |
2486 | ||
2487 | static void kdb_gmtime(struct timespec *tv, struct kdb_tm *tm) | |
2488 | { | |
2489 | /* This will work from 1970-2099, 2100 is not a leap year */ | |
2490 | static int mon_day[] = { 31, 29, 31, 30, 31, 30, 31, | |
2491 | 31, 30, 31, 30, 31 }; | |
2492 | memset(tm, 0, sizeof(*tm)); | |
2493 | tm->tm_sec = tv->tv_sec % (24 * 60 * 60); | |
2494 | tm->tm_mday = tv->tv_sec / (24 * 60 * 60) + | |
2495 | (2 * 365 + 1); /* shift base from 1970 to 1968 */ | |
2496 | tm->tm_min = tm->tm_sec / 60 % 60; | |
2497 | tm->tm_hour = tm->tm_sec / 60 / 60; | |
2498 | tm->tm_sec = tm->tm_sec % 60; | |
2499 | tm->tm_year = 68 + 4*(tm->tm_mday / (4*365+1)); | |
2500 | tm->tm_mday %= (4*365+1); | |
2501 | mon_day[1] = 29; | |
2502 | while (tm->tm_mday >= mon_day[tm->tm_mon]) { | |
2503 | tm->tm_mday -= mon_day[tm->tm_mon]; | |
2504 | if (++tm->tm_mon == 12) { | |
2505 | tm->tm_mon = 0; | |
2506 | ++tm->tm_year; | |
2507 | mon_day[1] = 28; | |
2508 | } | |
2509 | } | |
2510 | ++tm->tm_mday; | |
2511 | } | |
2512 | ||
2513 | /* | |
2514 | * Most of this code has been lifted from kernel/timer.c::sys_sysinfo(). | |
2515 | * I cannot call that code directly from kdb, it has an unconditional | |
2516 | * cli()/sti() and calls routines that take locks which can stop the debugger. | |
2517 | */ | |
2518 | static void kdb_sysinfo(struct sysinfo *val) | |
2519 | { | |
2520 | struct timespec uptime; | |
a9821c74 | 2521 | ktime_get_ts(&uptime); |
5d5314d6 JW |
2522 | memset(val, 0, sizeof(*val)); |
2523 | val->uptime = uptime.tv_sec; | |
2524 | val->loads[0] = avenrun[0]; | |
2525 | val->loads[1] = avenrun[1]; | |
2526 | val->loads[2] = avenrun[2]; | |
2527 | val->procs = nr_threads-1; | |
2528 | si_meminfo(val); | |
2529 | ||
2530 | return; | |
2531 | } | |
2532 | ||
2533 | /* | |
2534 | * kdb_summary - This function implements the 'summary' command. | |
2535 | */ | |
2536 | static int kdb_summary(int argc, const char **argv) | |
2537 | { | |
157b1a23 | 2538 | struct timespec now; |
5d5314d6 JW |
2539 | struct kdb_tm tm; |
2540 | struct sysinfo val; | |
2541 | ||
2542 | if (argc) | |
2543 | return KDB_ARGCOUNT; | |
2544 | ||
2545 | kdb_printf("sysname %s\n", init_uts_ns.name.sysname); | |
2546 | kdb_printf("release %s\n", init_uts_ns.name.release); | |
2547 | kdb_printf("version %s\n", init_uts_ns.name.version); | |
2548 | kdb_printf("machine %s\n", init_uts_ns.name.machine); | |
2549 | kdb_printf("nodename %s\n", init_uts_ns.name.nodename); | |
2550 | kdb_printf("domainname %s\n", init_uts_ns.name.domainname); | |
2551 | kdb_printf("ccversion %s\n", __stringify(CCVERSION)); | |
2552 | ||
157b1a23 TG |
2553 | now = __current_kernel_time(); |
2554 | kdb_gmtime(&now, &tm); | |
5d5314d6 JW |
2555 | kdb_printf("date %04d-%02d-%02d %02d:%02d:%02d " |
2556 | "tz_minuteswest %d\n", | |
2557 | 1900+tm.tm_year, tm.tm_mon+1, tm.tm_mday, | |
2558 | tm.tm_hour, tm.tm_min, tm.tm_sec, | |
2559 | sys_tz.tz_minuteswest); | |
2560 | ||
2561 | kdb_sysinfo(&val); | |
2562 | kdb_printf("uptime "); | |
2563 | if (val.uptime > (24*60*60)) { | |
2564 | int days = val.uptime / (24*60*60); | |
2565 | val.uptime %= (24*60*60); | |
2566 | kdb_printf("%d day%s ", days, days == 1 ? "" : "s"); | |
2567 | } | |
2568 | kdb_printf("%02ld:%02ld\n", val.uptime/(60*60), (val.uptime/60)%60); | |
2569 | ||
2570 | /* lifted from fs/proc/proc_misc.c::loadavg_read_proc() */ | |
2571 | ||
2572 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
2573 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
2574 | kdb_printf("load avg %ld.%02ld %ld.%02ld %ld.%02ld\n", | |
2575 | LOAD_INT(val.loads[0]), LOAD_FRAC(val.loads[0]), | |
2576 | LOAD_INT(val.loads[1]), LOAD_FRAC(val.loads[1]), | |
2577 | LOAD_INT(val.loads[2]), LOAD_FRAC(val.loads[2])); | |
2578 | #undef LOAD_INT | |
2579 | #undef LOAD_FRAC | |
2580 | /* Display in kilobytes */ | |
2581 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
2582 | kdb_printf("\nMemTotal: %8lu kB\nMemFree: %8lu kB\n" | |
2583 | "Buffers: %8lu kB\n", | |
2584 | val.totalram, val.freeram, val.bufferram); | |
2585 | return 0; | |
2586 | } | |
2587 | ||
2588 | /* | |
2589 | * kdb_per_cpu - This function implements the 'per_cpu' command. | |
2590 | */ | |
2591 | static int kdb_per_cpu(int argc, const char **argv) | |
2592 | { | |
931ea248 JW |
2593 | char fmtstr[64]; |
2594 | int cpu, diag, nextarg = 1; | |
2595 | unsigned long addr, symaddr, val, bytesperword = 0, whichcpu = ~0UL; | |
5d5314d6 JW |
2596 | |
2597 | if (argc < 1 || argc > 3) | |
2598 | return KDB_ARGCOUNT; | |
2599 | ||
931ea248 JW |
2600 | diag = kdbgetaddrarg(argc, argv, &nextarg, &symaddr, NULL, NULL); |
2601 | if (diag) | |
2602 | return diag; | |
2603 | ||
5d5314d6 JW |
2604 | if (argc >= 2) { |
2605 | diag = kdbgetularg(argv[2], &bytesperword); | |
2606 | if (diag) | |
2607 | return diag; | |
2608 | } | |
2609 | if (!bytesperword) | |
2610 | bytesperword = KDB_WORD_SIZE; | |
2611 | else if (bytesperword > KDB_WORD_SIZE) | |
2612 | return KDB_BADWIDTH; | |
2613 | sprintf(fmtstr, "%%0%dlx ", (int)(2*bytesperword)); | |
2614 | if (argc >= 3) { | |
2615 | diag = kdbgetularg(argv[3], &whichcpu); | |
2616 | if (diag) | |
2617 | return diag; | |
2618 | if (!cpu_online(whichcpu)) { | |
2619 | kdb_printf("cpu %ld is not online\n", whichcpu); | |
2620 | return KDB_BADCPUNUM; | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | /* Most architectures use __per_cpu_offset[cpu], some use | |
2625 | * __per_cpu_offset(cpu), smp has no __per_cpu_offset. | |
2626 | */ | |
2627 | #ifdef __per_cpu_offset | |
2628 | #define KDB_PCU(cpu) __per_cpu_offset(cpu) | |
2629 | #else | |
2630 | #ifdef CONFIG_SMP | |
2631 | #define KDB_PCU(cpu) __per_cpu_offset[cpu] | |
2632 | #else | |
2633 | #define KDB_PCU(cpu) 0 | |
2634 | #endif | |
2635 | #endif | |
5d5314d6 | 2636 | for_each_online_cpu(cpu) { |
931ea248 JW |
2637 | if (KDB_FLAG(CMD_INTERRUPT)) |
2638 | return 0; | |
2639 | ||
5d5314d6 JW |
2640 | if (whichcpu != ~0UL && whichcpu != cpu) |
2641 | continue; | |
931ea248 | 2642 | addr = symaddr + KDB_PCU(cpu); |
5d5314d6 JW |
2643 | diag = kdb_getword(&val, addr, bytesperword); |
2644 | if (diag) { | |
2645 | kdb_printf("%5d " kdb_bfd_vma_fmt0 " - unable to " | |
2646 | "read, diag=%d\n", cpu, addr, diag); | |
2647 | continue; | |
2648 | } | |
5d5314d6 JW |
2649 | kdb_printf("%5d ", cpu); |
2650 | kdb_md_line(fmtstr, addr, | |
2651 | bytesperword == KDB_WORD_SIZE, | |
2652 | 1, bytesperword, 1, 1, 0); | |
2653 | } | |
5d5314d6 | 2654 | #undef KDB_PCU |
5d5314d6 JW |
2655 | return 0; |
2656 | } | |
2657 | ||
2658 | /* | |
2659 | * display help for the use of cmd | grep pattern | |
2660 | */ | |
2661 | static int kdb_grep_help(int argc, const char **argv) | |
2662 | { | |
2663 | kdb_printf("Usage of cmd args | grep pattern:\n"); | |
2664 | kdb_printf(" Any command's output may be filtered through an "); | |
2665 | kdb_printf("emulated 'pipe'.\n"); | |
2666 | kdb_printf(" 'grep' is just a key word.\n"); | |
2667 | kdb_printf(" The pattern may include a very limited set of " | |
2668 | "metacharacters:\n"); | |
2669 | kdb_printf(" pattern or ^pattern or pattern$ or ^pattern$\n"); | |
2670 | kdb_printf(" And if there are spaces in the pattern, you may " | |
2671 | "quote it:\n"); | |
2672 | kdb_printf(" \"pat tern\" or \"^pat tern\" or \"pat tern$\"" | |
2673 | " or \"^pat tern$\"\n"); | |
2674 | return 0; | |
2675 | } | |
2676 | ||
2677 | /* | |
42c884c1 | 2678 | * kdb_register_flags - This function is used to register a kernel |
5d5314d6 JW |
2679 | * debugger command. |
2680 | * Inputs: | |
2681 | * cmd Command name | |
2682 | * func Function to execute the command | |
2683 | * usage A simple usage string showing arguments | |
2684 | * help A simple help string describing command | |
2685 | * repeat Does the command auto repeat on enter? | |
2686 | * Returns: | |
2687 | * zero for success, one if a duplicate command. | |
2688 | */ | |
2689 | #define kdb_command_extend 50 /* arbitrary */ | |
42c884c1 AV |
2690 | int kdb_register_flags(char *cmd, |
2691 | kdb_func_t func, | |
2692 | char *usage, | |
2693 | char *help, | |
2694 | short minlen, | |
2695 | kdb_cmdflags_t flags) | |
5d5314d6 JW |
2696 | { |
2697 | int i; | |
2698 | kdbtab_t *kp; | |
2699 | ||
2700 | /* | |
2701 | * Brute force method to determine duplicates | |
2702 | */ | |
2703 | for_each_kdbcmd(kp, i) { | |
2704 | if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) { | |
2705 | kdb_printf("Duplicate kdb command registered: " | |
2706 | "%s, func %p help %s\n", cmd, func, help); | |
2707 | return 1; | |
2708 | } | |
2709 | } | |
2710 | ||
2711 | /* | |
2712 | * Insert command into first available location in table | |
2713 | */ | |
2714 | for_each_kdbcmd(kp, i) { | |
2715 | if (kp->cmd_name == NULL) | |
2716 | break; | |
2717 | } | |
2718 | ||
2719 | if (i >= kdb_max_commands) { | |
2720 | kdbtab_t *new = kmalloc((kdb_max_commands - KDB_BASE_CMD_MAX + | |
2721 | kdb_command_extend) * sizeof(*new), GFP_KDB); | |
2722 | if (!new) { | |
2723 | kdb_printf("Could not allocate new kdb_command " | |
2724 | "table\n"); | |
2725 | return 1; | |
2726 | } | |
2727 | if (kdb_commands) { | |
2728 | memcpy(new, kdb_commands, | |
5450d904 | 2729 | (kdb_max_commands - KDB_BASE_CMD_MAX) * sizeof(*new)); |
5d5314d6 JW |
2730 | kfree(kdb_commands); |
2731 | } | |
f7c82d5a | 2732 | memset(new + kdb_max_commands - KDB_BASE_CMD_MAX, 0, |
5d5314d6 JW |
2733 | kdb_command_extend * sizeof(*new)); |
2734 | kdb_commands = new; | |
5450d904 | 2735 | kp = kdb_commands + kdb_max_commands - KDB_BASE_CMD_MAX; |
5d5314d6 JW |
2736 | kdb_max_commands += kdb_command_extend; |
2737 | } | |
2738 | ||
2739 | kp->cmd_name = cmd; | |
2740 | kp->cmd_func = func; | |
2741 | kp->cmd_usage = usage; | |
2742 | kp->cmd_help = help; | |
5d5314d6 | 2743 | kp->cmd_minlen = minlen; |
15a42a9b | 2744 | kp->cmd_flags = flags; |
5d5314d6 JW |
2745 | |
2746 | return 0; | |
2747 | } | |
42c884c1 | 2748 | EXPORT_SYMBOL_GPL(kdb_register_flags); |
f7030bbc | 2749 | |
5d5314d6 JW |
2750 | |
2751 | /* | |
2752 | * kdb_register - Compatibility register function for commands that do | |
2753 | * not need to specify a repeat state. Equivalent to | |
e8ab24d9 | 2754 | * kdb_register_flags with flags set to 0. |
5d5314d6 JW |
2755 | * Inputs: |
2756 | * cmd Command name | |
2757 | * func Function to execute the command | |
2758 | * usage A simple usage string showing arguments | |
2759 | * help A simple help string describing command | |
2760 | * Returns: | |
2761 | * zero for success, one if a duplicate command. | |
2762 | */ | |
2763 | int kdb_register(char *cmd, | |
2764 | kdb_func_t func, | |
2765 | char *usage, | |
2766 | char *help, | |
2767 | short minlen) | |
2768 | { | |
e8ab24d9 | 2769 | return kdb_register_flags(cmd, func, usage, help, minlen, 0); |
5d5314d6 | 2770 | } |
f7030bbc | 2771 | EXPORT_SYMBOL_GPL(kdb_register); |
5d5314d6 JW |
2772 | |
2773 | /* | |
2774 | * kdb_unregister - This function is used to unregister a kernel | |
2775 | * debugger command. It is generally called when a module which | |
2776 | * implements kdb commands is unloaded. | |
2777 | * Inputs: | |
2778 | * cmd Command name | |
2779 | * Returns: | |
2780 | * zero for success, one command not registered. | |
2781 | */ | |
2782 | int kdb_unregister(char *cmd) | |
2783 | { | |
2784 | int i; | |
2785 | kdbtab_t *kp; | |
2786 | ||
2787 | /* | |
2788 | * find the command. | |
2789 | */ | |
75d14ede | 2790 | for_each_kdbcmd(kp, i) { |
5d5314d6 JW |
2791 | if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) { |
2792 | kp->cmd_name = NULL; | |
2793 | return 0; | |
2794 | } | |
2795 | } | |
2796 | ||
2797 | /* Couldn't find it. */ | |
2798 | return 1; | |
2799 | } | |
f7030bbc | 2800 | EXPORT_SYMBOL_GPL(kdb_unregister); |
5d5314d6 JW |
2801 | |
2802 | /* Initialize the kdb command table. */ | |
2803 | static void __init kdb_inittab(void) | |
2804 | { | |
2805 | int i; | |
2806 | kdbtab_t *kp; | |
2807 | ||
2808 | for_each_kdbcmd(kp, i) | |
2809 | kp->cmd_name = NULL; | |
2810 | ||
42c884c1 | 2811 | kdb_register_flags("md", kdb_md, "<vaddr>", |
5d5314d6 | 2812 | "Display Memory Contents, also mdWcN, e.g. md8c1", 1, |
9452e977 | 2813 | KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS); |
42c884c1 | 2814 | kdb_register_flags("mdr", kdb_md, "<vaddr> <bytes>", |
9452e977 DT |
2815 | "Display Raw Memory", 0, |
2816 | KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS); | |
42c884c1 | 2817 | kdb_register_flags("mdp", kdb_md, "<paddr> <bytes>", |
9452e977 DT |
2818 | "Display Physical Memory", 0, |
2819 | KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS); | |
42c884c1 | 2820 | kdb_register_flags("mds", kdb_md, "<vaddr>", |
9452e977 DT |
2821 | "Display Memory Symbolically", 0, |
2822 | KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS); | |
42c884c1 | 2823 | kdb_register_flags("mm", kdb_mm, "<vaddr> <contents>", |
9452e977 DT |
2824 | "Modify Memory Contents", 0, |
2825 | KDB_ENABLE_MEM_WRITE | KDB_REPEAT_NO_ARGS); | |
42c884c1 | 2826 | kdb_register_flags("go", kdb_go, "[<vaddr>]", |
9452e977 DT |
2827 | "Continue Execution", 1, |
2828 | KDB_ENABLE_REG_WRITE | KDB_ENABLE_ALWAYS_SAFE_NO_ARGS); | |
42c884c1 | 2829 | kdb_register_flags("rd", kdb_rd, "", |
9452e977 DT |
2830 | "Display Registers", 0, |
2831 | KDB_ENABLE_REG_READ); | |
42c884c1 | 2832 | kdb_register_flags("rm", kdb_rm, "<reg> <contents>", |
9452e977 DT |
2833 | "Modify Registers", 0, |
2834 | KDB_ENABLE_REG_WRITE); | |
42c884c1 | 2835 | kdb_register_flags("ef", kdb_ef, "<vaddr>", |
9452e977 DT |
2836 | "Display exception frame", 0, |
2837 | KDB_ENABLE_MEM_READ); | |
42c884c1 | 2838 | kdb_register_flags("bt", kdb_bt, "[<vaddr>]", |
9452e977 DT |
2839 | "Stack traceback", 1, |
2840 | KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS); | |
42c884c1 | 2841 | kdb_register_flags("btp", kdb_bt, "<pid>", |
9452e977 DT |
2842 | "Display stack for process <pid>", 0, |
2843 | KDB_ENABLE_INSPECT); | |
42c884c1 | 2844 | kdb_register_flags("bta", kdb_bt, "[D|R|S|T|C|Z|E|U|I|M|A]", |
9452e977 DT |
2845 | "Backtrace all processes matching state flag", 0, |
2846 | KDB_ENABLE_INSPECT); | |
42c884c1 | 2847 | kdb_register_flags("btc", kdb_bt, "", |
9452e977 DT |
2848 | "Backtrace current process on each cpu", 0, |
2849 | KDB_ENABLE_INSPECT); | |
42c884c1 | 2850 | kdb_register_flags("btt", kdb_bt, "<vaddr>", |
5d5314d6 | 2851 | "Backtrace process given its struct task address", 0, |
9452e977 | 2852 | KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS); |
42c884c1 | 2853 | kdb_register_flags("env", kdb_env, "", |
9452e977 DT |
2854 | "Show environment variables", 0, |
2855 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2856 | kdb_register_flags("set", kdb_set, "", |
9452e977 DT |
2857 | "Set environment variables", 0, |
2858 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2859 | kdb_register_flags("help", kdb_help, "", |
9452e977 DT |
2860 | "Display Help Message", 1, |
2861 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2862 | kdb_register_flags("?", kdb_help, "", |
9452e977 DT |
2863 | "Display Help Message", 0, |
2864 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2865 | kdb_register_flags("cpu", kdb_cpu, "<cpunum>", |
9452e977 DT |
2866 | "Switch to new cpu", 0, |
2867 | KDB_ENABLE_ALWAYS_SAFE_NO_ARGS); | |
42c884c1 | 2868 | kdb_register_flags("kgdb", kdb_kgdb, "", |
e8ab24d9 | 2869 | "Enter kgdb mode", 0, 0); |
42c884c1 | 2870 | kdb_register_flags("ps", kdb_ps, "[<flags>|A]", |
9452e977 DT |
2871 | "Display active task list", 0, |
2872 | KDB_ENABLE_INSPECT); | |
42c884c1 | 2873 | kdb_register_flags("pid", kdb_pid, "<pidnum>", |
9452e977 DT |
2874 | "Switch to another task", 0, |
2875 | KDB_ENABLE_INSPECT); | |
42c884c1 | 2876 | kdb_register_flags("reboot", kdb_reboot, "", |
9452e977 DT |
2877 | "Reboot the machine immediately", 0, |
2878 | KDB_ENABLE_REBOOT); | |
5d5314d6 | 2879 | #if defined(CONFIG_MODULES) |
42c884c1 | 2880 | kdb_register_flags("lsmod", kdb_lsmod, "", |
9452e977 DT |
2881 | "List loaded kernel modules", 0, |
2882 | KDB_ENABLE_INSPECT); | |
5d5314d6 JW |
2883 | #endif |
2884 | #if defined(CONFIG_MAGIC_SYSRQ) | |
42c884c1 | 2885 | kdb_register_flags("sr", kdb_sr, "<key>", |
9452e977 DT |
2886 | "Magic SysRq key", 0, |
2887 | KDB_ENABLE_ALWAYS_SAFE); | |
5d5314d6 JW |
2888 | #endif |
2889 | #if defined(CONFIG_PRINTK) | |
42c884c1 | 2890 | kdb_register_flags("dmesg", kdb_dmesg, "[lines]", |
9452e977 DT |
2891 | "Display syslog buffer", 0, |
2892 | KDB_ENABLE_ALWAYS_SAFE); | |
5d5314d6 | 2893 | #endif |
ad394f66 | 2894 | if (arch_kgdb_ops.enable_nmi) { |
42c884c1 | 2895 | kdb_register_flags("disable_nmi", kdb_disable_nmi, "", |
9452e977 DT |
2896 | "Disable NMI entry to KDB", 0, |
2897 | KDB_ENABLE_ALWAYS_SAFE); | |
ad394f66 | 2898 | } |
42c884c1 | 2899 | kdb_register_flags("defcmd", kdb_defcmd, "name \"usage\" \"help\"", |
9452e977 DT |
2900 | "Define a set of commands, down to endefcmd", 0, |
2901 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2902 | kdb_register_flags("kill", kdb_kill, "<-signal> <pid>", |
9452e977 DT |
2903 | "Send a signal to a process", 0, |
2904 | KDB_ENABLE_SIGNAL); | |
42c884c1 | 2905 | kdb_register_flags("summary", kdb_summary, "", |
9452e977 DT |
2906 | "Summarize the system", 4, |
2907 | KDB_ENABLE_ALWAYS_SAFE); | |
42c884c1 | 2908 | kdb_register_flags("per_cpu", kdb_per_cpu, "<sym> [<bytes>] [<cpu>]", |
9452e977 DT |
2909 | "Display per_cpu variables", 3, |
2910 | KDB_ENABLE_MEM_READ); | |
42c884c1 | 2911 | kdb_register_flags("grephelp", kdb_grep_help, "", |
9452e977 DT |
2912 | "Display help on | grep", 0, |
2913 | KDB_ENABLE_ALWAYS_SAFE); | |
5d5314d6 JW |
2914 | } |
2915 | ||
2916 | /* Execute any commands defined in kdb_cmds. */ | |
2917 | static void __init kdb_cmd_init(void) | |
2918 | { | |
2919 | int i, diag; | |
2920 | for (i = 0; kdb_cmds[i]; ++i) { | |
2921 | diag = kdb_parse(kdb_cmds[i]); | |
2922 | if (diag) | |
2923 | kdb_printf("kdb command %s failed, kdb diag %d\n", | |
2924 | kdb_cmds[i], diag); | |
2925 | } | |
2926 | if (defcmd_in_progress) { | |
2927 | kdb_printf("Incomplete 'defcmd' set, forcing endefcmd\n"); | |
2928 | kdb_parse("endefcmd"); | |
2929 | } | |
2930 | } | |
2931 | ||
b595076a | 2932 | /* Initialize kdb_printf, breakpoint tables and kdb state */ |
5d5314d6 JW |
2933 | void __init kdb_init(int lvl) |
2934 | { | |
2935 | static int kdb_init_lvl = KDB_NOT_INITIALIZED; | |
2936 | int i; | |
2937 | ||
2938 | if (kdb_init_lvl == KDB_INIT_FULL || lvl <= kdb_init_lvl) | |
2939 | return; | |
2940 | for (i = kdb_init_lvl; i < lvl; i++) { | |
2941 | switch (i) { | |
2942 | case KDB_NOT_INITIALIZED: | |
2943 | kdb_inittab(); /* Initialize Command Table */ | |
2944 | kdb_initbptab(); /* Initialize Breakpoints */ | |
2945 | break; | |
2946 | case KDB_INIT_EARLY: | |
2947 | kdb_cmd_init(); /* Build kdb_cmds tables */ | |
2948 | break; | |
2949 | } | |
2950 | } | |
2951 | kdb_init_lvl = lvl; | |
2952 | } |