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14#include <linux/ctype.h>
15#include <linux/string.h>
16#include <linux/kernel.h>
17#include <linux/reboot.h>
18#include <linux/sched.h>
19#include <linux/sysrq.h>
20#include <linux/smp.h>
21#include <linux/utsname.h>
22#include <linux/vmalloc.h>
23#include <linux/module.h>
24#include <linux/mm.h>
25#include <linux/init.h>
26#include <linux/kallsyms.h>
27#include <linux/kgdb.h>
28#include <linux/kdb.h>
29#include <linux/notifier.h>
30#include <linux/interrupt.h>
31#include <linux/delay.h>
32#include <linux/nmi.h>
33#include <linux/time.h>
34#include <linux/ptrace.h>
35#include <linux/sysctl.h>
36#include <linux/cpu.h>
37#include <linux/kdebug.h>
38#include <linux/proc_fs.h>
39#include <linux/uaccess.h>
40#include <linux/slab.h>
41#include "kdb_private.h"
42
43#define GREP_LEN 256
44char kdb_grep_string[GREP_LEN];
45int kdb_grepping_flag;
46EXPORT_SYMBOL(kdb_grepping_flag);
47int kdb_grep_leading;
48int kdb_grep_trailing;
49
50
51
52
53int kdb_flags;
54atomic_t kdb_event;
55
56
57
58
59
60int kdb_initial_cpu = -1;
61int kdb_nextline = 1;
62int kdb_state;
63
64struct task_struct *kdb_current_task;
65EXPORT_SYMBOL(kdb_current_task);
66struct pt_regs *kdb_current_regs;
67
68const char *kdb_diemsg;
69static int kdb_go_count;
70#ifdef CONFIG_KDB_CONTINUE_CATASTROPHIC
71static unsigned int kdb_continue_catastrophic =
72 CONFIG_KDB_CONTINUE_CATASTROPHIC;
73#else
74static unsigned int kdb_continue_catastrophic;
75#endif
76
77
78static kdbtab_t *kdb_commands;
79#define KDB_BASE_CMD_MAX 50
80static int kdb_max_commands = KDB_BASE_CMD_MAX;
81static kdbtab_t kdb_base_commands[50];
82#define for_each_kdbcmd(cmd, num) \
83 for ((cmd) = kdb_base_commands, (num) = 0; \
84 num < kdb_max_commands; \
85 num++, num == KDB_BASE_CMD_MAX ? cmd = kdb_commands : cmd++)
86
87typedef struct _kdbmsg {
88 int km_diag;
89 char *km_msg;
90} kdbmsg_t;
91
92#define KDBMSG(msgnum, text) \
93 { KDB_##msgnum, text }
94
95static kdbmsg_t kdbmsgs[] = {
96 KDBMSG(NOTFOUND, "Command Not Found"),
97 KDBMSG(ARGCOUNT, "Improper argument count, see usage."),
98 KDBMSG(BADWIDTH, "Illegal value for BYTESPERWORD use 1, 2, 4 or 8, "
99 "8 is only allowed on 64 bit systems"),
100 KDBMSG(BADRADIX, "Illegal value for RADIX use 8, 10 or 16"),
101 KDBMSG(NOTENV, "Cannot find environment variable"),
102 KDBMSG(NOENVVALUE, "Environment variable should have value"),
103 KDBMSG(NOTIMP, "Command not implemented"),
104 KDBMSG(ENVFULL, "Environment full"),
105 KDBMSG(ENVBUFFULL, "Environment buffer full"),
106 KDBMSG(TOOMANYBPT, "Too many breakpoints defined"),
107#ifdef CONFIG_CPU_XSCALE
108 KDBMSG(TOOMANYDBREGS, "More breakpoints than ibcr registers defined"),
109#else
110 KDBMSG(TOOMANYDBREGS, "More breakpoints than db registers defined"),
111#endif
112 KDBMSG(DUPBPT, "Duplicate breakpoint address"),
113 KDBMSG(BPTNOTFOUND, "Breakpoint not found"),
114 KDBMSG(BADMODE, "Invalid IDMODE"),
115 KDBMSG(BADINT, "Illegal numeric value"),
116 KDBMSG(INVADDRFMT, "Invalid symbolic address format"),
117 KDBMSG(BADREG, "Invalid register name"),
118 KDBMSG(BADCPUNUM, "Invalid cpu number"),
119 KDBMSG(BADLENGTH, "Invalid length field"),
120 KDBMSG(NOBP, "No Breakpoint exists"),
121 KDBMSG(BADADDR, "Invalid address"),
122};
123#undef KDBMSG
124
125static const int __nkdb_err = sizeof(kdbmsgs) / sizeof(kdbmsg_t);
126
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136
137
138static char *__env[] = {
139#if defined(CONFIG_SMP)
140 "PROMPT=[%d]kdb> ",
141 "MOREPROMPT=[%d]more> ",
142#else
143 "PROMPT=kdb> ",
144 "MOREPROMPT=more> ",
145#endif
146 "RADIX=16",
147 "MDCOUNT=8",
148 "BTARGS=9",
149 KDB_PLATFORM_ENV,
150 "DTABCOUNT=30",
151 "NOSECT=1",
152 (char *)0,
153 (char *)0,
154 (char *)0,
155 (char *)0,
156 (char *)0,
157 (char *)0,
158 (char *)0,
159 (char *)0,
160 (char *)0,
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,
175};
176
177static const int __nenv = (sizeof(__env) / sizeof(char *));
178
179struct task_struct *kdb_curr_task(int cpu)
180{
181 struct task_struct *p = curr_task(cpu);
182#ifdef _TIF_MCA_INIT
183 if ((task_thread_info(p)->flags & _TIF_MCA_INIT) && KDB_TSK(cpu))
184 p = krp->p;
185#endif
186 return p;
187}
188
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195
196
197
198char *kdbgetenv(const char *match)
199{
200 char **ep = __env;
201 int matchlen = strlen(match);
202 int i;
203
204 for (i = 0; i < __nenv; i++) {
205 char *e = *ep++;
206
207 if (!e)
208 continue;
209
210 if ((strncmp(match, e, matchlen) == 0)
211 && ((e[matchlen] == '\0')
212 || (e[matchlen] == '='))) {
213 char *cp = strchr(e, '=');
214 return cp ? ++cp : "";
215 }
216 }
217 return NULL;
218}
219
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234
235
236static char *kdballocenv(size_t bytes)
237{
238#define KDB_ENVBUFSIZE 512
239 static char envbuffer[KDB_ENVBUFSIZE];
240 static int envbufsize;
241 char *ep = NULL;
242
243 if ((KDB_ENVBUFSIZE - envbufsize) >= bytes) {
244 ep = &envbuffer[envbufsize];
245 envbufsize += bytes;
246 }
247 return ep;
248}
249
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259
260static int kdbgetulenv(const char *match, unsigned long *value)
261{
262 char *ep;
263
264 ep = kdbgetenv(match);
265 if (!ep)
266 return KDB_NOTENV;
267 if (strlen(ep) == 0)
268 return KDB_NOENVVALUE;
269
270 *value = simple_strtoul(ep, NULL, 0);
271
272 return 0;
273}
274
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284
285int kdbgetintenv(const char *match, int *value)
286{
287 unsigned long val;
288 int diag;
289
290 diag = kdbgetulenv(match, &val);
291 if (!diag)
292 *value = (int) val;
293 return diag;
294}
295
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304
305
306int kdbgetularg(const char *arg, unsigned long *value)
307{
308 char *endp;
309 unsigned long val;
310
311 val = simple_strtoul(arg, &endp, 0);
312
313 if (endp == arg) {
314
315
316
317
318 val = simple_strtoul(arg, &endp, 16);
319 if (endp == arg)
320 return KDB_BADINT;
321 }
322
323 *value = val;
324
325 return 0;
326}
327
328int kdbgetu64arg(const char *arg, u64 *value)
329{
330 char *endp;
331 u64 val;
332
333 val = simple_strtoull(arg, &endp, 0);
334
335 if (endp == arg) {
336
337 val = simple_strtoull(arg, &endp, 16);
338 if (endp == arg)
339 return KDB_BADINT;
340 }
341
342 *value = val;
343
344 return 0;
345}
346
347
348
349
350
351int kdb_set(int argc, const char **argv)
352{
353 int i;
354 char *ep;
355 size_t varlen, vallen;
356
357
358
359
360
361
362
363 if (argc == 3) {
364 argv[2] = argv[3];
365 argc--;
366 }
367
368 if (argc != 2)
369 return KDB_ARGCOUNT;
370
371
372
373
374 if (strcmp(argv[1], "KDBDEBUG") == 0) {
375 unsigned int debugflags;
376 char *cp;
377
378 debugflags = simple_strtoul(argv[2], &cp, 0);
379 if (cp == argv[2] || debugflags & ~KDB_DEBUG_FLAG_MASK) {
380 kdb_printf("kdb: illegal debug flags '%s'\n",
381 argv[2]);
382 return 0;
383 }
384 kdb_flags = (kdb_flags &
385 ~(KDB_DEBUG_FLAG_MASK << KDB_DEBUG_FLAG_SHIFT))
386 | (debugflags << KDB_DEBUG_FLAG_SHIFT);
387
388 return 0;
389 }
390
391
392
393
394
395 varlen = strlen(argv[1]);
396 vallen = strlen(argv[2]);
397 ep = kdballocenv(varlen + vallen + 2);
398 if (ep == (char *)0)
399 return KDB_ENVBUFFULL;
400
401 sprintf(ep, "%s=%s", argv[1], argv[2]);
402
403 ep[varlen+vallen+1] = '\0';
404
405 for (i = 0; i < __nenv; i++) {
406 if (__env[i]
407 && ((strncmp(__env[i], argv[1], varlen) == 0)
408 && ((__env[i][varlen] == '\0')
409 || (__env[i][varlen] == '=')))) {
410 __env[i] = ep;
411 return 0;
412 }
413 }
414
415
416
417
418 for (i = 0; i < __nenv-1; i++) {
419 if (__env[i] == (char *)0) {
420 __env[i] = ep;
421 return 0;
422 }
423 }
424
425 return KDB_ENVFULL;
426}
427
428static int kdb_check_regs(void)
429{
430 if (!kdb_current_regs) {
431 kdb_printf("No current kdb registers."
432 " You may need to select another task\n");
433 return KDB_BADREG;
434 }
435 return 0;
436}
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463int kdbgetaddrarg(int argc, const char **argv, int *nextarg,
464 unsigned long *value, long *offset,
465 char **name)
466{
467 unsigned long addr;
468 unsigned long off = 0;
469 int positive;
470 int diag;
471 int found = 0;
472 char *symname;
473 char symbol = '\0';
474 char *cp;
475 kdb_symtab_t symtab;
476
477
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483
484
485 if (*nextarg > argc)
486 return KDB_ARGCOUNT;
487
488 symname = (char *)argv[*nextarg];
489
490
491
492
493
494
495
496 cp = strpbrk(symname, "+-");
497 if (cp != NULL) {
498 symbol = *cp;
499 *cp++ = '\0';
500 }
501
502 if (symname[0] == '$') {
503 diag = kdbgetulenv(&symname[1], &addr);
504 if (diag)
505 return diag;
506 } else if (symname[0] == '%') {
507 diag = kdb_check_regs();
508 if (diag)
509 return diag;
510
511
512
513 return KDB_NOTIMP;
514 } else {
515 found = kdbgetsymval(symname, &symtab);
516 if (found) {
517 addr = symtab.sym_start;
518 } else {
519 diag = kdbgetularg(argv[*nextarg], &addr);
520 if (diag)
521 return diag;
522 }
523 }
524
525 if (!found)
526 found = kdbnearsym(addr, &symtab);
527
528 (*nextarg)++;
529
530 if (name)
531 *name = symname;
532 if (value)
533 *value = addr;
534 if (offset && name && *name)
535 *offset = addr - symtab.sym_start;
536
537 if ((*nextarg > argc)
538 && (symbol == '\0'))
539 return 0;
540
541
542
543
544
545 if (symbol == '\0') {
546 if ((argv[*nextarg][0] != '+')
547 && (argv[*nextarg][0] != '-')) {
548
549
550
551 return 0;
552 } else {
553 positive = (argv[*nextarg][0] == '+');
554 (*nextarg)++;
555 }
556 } else
557 positive = (symbol == '+');
558
559
560
561
562 if ((*nextarg > argc)
563 && (symbol == '\0')) {
564 return KDB_INVADDRFMT;
565 }
566
567 if (!symbol) {
568 cp = (char *)argv[*nextarg];
569 (*nextarg)++;
570 }
571
572 diag = kdbgetularg(cp, &off);
573 if (diag)
574 return diag;
575
576 if (!positive)
577 off = -off;
578
579 if (offset)
580 *offset += off;
581
582 if (value)
583 *value += off;
584
585 return 0;
586}
587
588static void kdb_cmderror(int diag)
589{
590 int i;
591
592 if (diag >= 0) {
593 kdb_printf("no error detected (diagnostic is %d)\n", diag);
594 return;
595 }
596
597 for (i = 0; i < __nkdb_err; i++) {
598 if (kdbmsgs[i].km_diag == diag) {
599 kdb_printf("diag: %d: %s\n", diag, kdbmsgs[i].km_msg);
600 return;
601 }
602 }
603
604 kdb_printf("Unknown diag %d\n", -diag);
605}
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618
619struct defcmd_set {
620 int count;
621 int usable;
622 char *name;
623 char *usage;
624 char *help;
625 char **command;
626};
627static struct defcmd_set *defcmd_set;
628static int defcmd_set_count;
629static int defcmd_in_progress;
630
631
632static int kdb_exec_defcmd(int argc, const char **argv);
633
634static int kdb_defcmd2(const char *cmdstr, const char *argv0)
635{
636 struct defcmd_set *s = defcmd_set + defcmd_set_count - 1;
637 char **save_command = s->command;
638 if (strcmp(argv0, "endefcmd") == 0) {
639 defcmd_in_progress = 0;
640 if (!s->count)
641 s->usable = 0;
642 if (s->usable)
643 kdb_register(s->name, kdb_exec_defcmd,
644 s->usage, s->help, 0);
645 return 0;
646 }
647 if (!s->usable)
648 return KDB_NOTIMP;
649 s->command = kzalloc((s->count + 1) * sizeof(*(s->command)), GFP_KDB);
650 if (!s->command) {
651 kdb_printf("Could not allocate new kdb_defcmd table for %s\n",
652 cmdstr);
653 s->usable = 0;
654 return KDB_NOTIMP;
655 }
656 memcpy(s->command, save_command, s->count * sizeof(*(s->command)));
657 s->command[s->count++] = kdb_strdup(cmdstr, GFP_KDB);
658 kfree(save_command);
659 return 0;
660}
661
662static int kdb_defcmd(int argc, const char **argv)
663{
664 struct defcmd_set *save_defcmd_set = defcmd_set, *s;
665 if (defcmd_in_progress) {
666 kdb_printf("kdb: nested defcmd detected, assuming missing "
667 "endefcmd\n");
668 kdb_defcmd2("endefcmd", "endefcmd");
669 }
670 if (argc == 0) {
671 int i;
672 for (s = defcmd_set; s < defcmd_set + defcmd_set_count; ++s) {
673 kdb_printf("defcmd %s \"%s\" \"%s\"\n", s->name,
674 s->usage, s->help);
675 for (i = 0; i < s->count; ++i)
676 kdb_printf("%s", s->command[i]);
677 kdb_printf("endefcmd\n");
678 }
679 return 0;
680 }
681 if (argc != 3)
682 return KDB_ARGCOUNT;
683 defcmd_set = kmalloc((defcmd_set_count + 1) * sizeof(*defcmd_set),
684 GFP_KDB);
685 if (!defcmd_set) {
686 kdb_printf("Could not allocate new defcmd_set entry for %s\n",
687 argv[1]);
688 defcmd_set = save_defcmd_set;
689 return KDB_NOTIMP;
690 }
691 memcpy(defcmd_set, save_defcmd_set,
692 defcmd_set_count * sizeof(*defcmd_set));
693 kfree(save_defcmd_set);
694 s = defcmd_set + defcmd_set_count;
695 memset(s, 0, sizeof(*s));
696 s->usable = 1;
697 s->name = kdb_strdup(argv[1], GFP_KDB);
698 s->usage = kdb_strdup(argv[2], GFP_KDB);
699 s->help = kdb_strdup(argv[3], GFP_KDB);
700 if (s->usage[0] == '"') {
701 strcpy(s->usage, s->usage+1);
702 s->usage[strlen(s->usage)-1] = '\0';
703 }
704 if (s->help[0] == '"') {
705 strcpy(s->help, s->help+1);
706 s->help[strlen(s->help)-1] = '\0';
707 }
708 ++defcmd_set_count;
709 defcmd_in_progress = 1;
710 return 0;
711}
712
713
714
715
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717
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719
720
721
722static int kdb_exec_defcmd(int argc, const char **argv)
723{
724 int i, ret;
725 struct defcmd_set *s;
726 if (argc != 0)
727 return KDB_ARGCOUNT;
728 for (s = defcmd_set, i = 0; i < defcmd_set_count; ++i, ++s) {
729 if (strcmp(s->name, argv[0]) == 0)
730 break;
731 }
732 if (i == defcmd_set_count) {
733 kdb_printf("kdb_exec_defcmd: could not find commands for %s\n",
734 argv[0]);
735 return KDB_NOTIMP;
736 }
737 for (i = 0; i < s->count; ++i) {
738
739
740 argv = NULL;
741 kdb_printf("[%s]kdb> %s\n", s->name, s->command[i]);
742 ret = kdb_parse(s->command[i]);
743 if (ret)
744 return ret;
745 }
746 return 0;
747}
748
749
750#define KDB_CMD_HISTORY_COUNT 32
751#define CMD_BUFLEN 200
752
753static unsigned int cmd_head, cmd_tail;
754static unsigned int cmdptr;
755static char cmd_hist[KDB_CMD_HISTORY_COUNT][CMD_BUFLEN];
756static char cmd_cur[CMD_BUFLEN];
757
758
759
760
761static void parse_grep(const char *str)
762{
763 int len;
764 char *cp = (char *)str, *cp2;
765
766
767 if (*cp != '|')
768 return;
769 cp++;
770 while (isspace(*cp))
771 cp++;
772 if (strncmp(cp, "grep ", 5)) {
773 kdb_printf("invalid 'pipe', see grephelp\n");
774 return;
775 }
776 cp += 5;
777 while (isspace(*cp))
778 cp++;
779 cp2 = strchr(cp, '\n');
780 if (cp2)
781 *cp2 = '\0';
782 len = strlen(cp);
783 if (len == 0) {
784 kdb_printf("invalid 'pipe', see grephelp\n");
785 return;
786 }
787
788 if (*cp == '"') {
789
790
791 cp++;
792 cp2 = strchr(cp, '"');
793 if (!cp2) {
794 kdb_printf("invalid quoted string, see grephelp\n");
795 return;
796 }
797 *cp2 = '\0';
798 }
799 kdb_grep_leading = 0;
800 if (*cp == '^') {
801 kdb_grep_leading = 1;
802 cp++;
803 }
804 len = strlen(cp);
805 kdb_grep_trailing = 0;
806 if (*(cp+len-1) == '$') {
807 kdb_grep_trailing = 1;
808 *(cp+len-1) = '\0';
809 }
810 len = strlen(cp);
811 if (!len)
812 return;
813 if (len >= GREP_LEN) {
814 kdb_printf("search string too long\n");
815 return;
816 }
817 strcpy(kdb_grep_string, cp);
818 kdb_grepping_flag++;
819 return;
820}
821
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847
848#define MAXARGC 20
849
850int kdb_parse(const char *cmdstr)
851{
852 static char *argv[MAXARGC];
853 static int argc;
854 static char cbuf[CMD_BUFLEN+2];
855 char *cp;
856 char *cpp, quoted;
857 kdbtab_t *tp;
858 int i, escaped, ignore_errors = 0, check_grep;
859
860
861
862
863 cp = (char *)cmdstr;
864 kdb_grepping_flag = check_grep = 0;
865
866 if (KDB_FLAG(CMD_INTERRUPT)) {
867
868
869 KDB_FLAG_CLEAR(CMD_INTERRUPT);
870 KDB_STATE_SET(PAGER);
871 argc = 0;
872 }
873
874 if (*cp != '\n' && *cp != '\0') {
875 argc = 0;
876 cpp = cbuf;
877 while (*cp) {
878
879 while (isspace(*cp))
880 cp++;
881 if ((*cp == '\0') || (*cp == '\n') ||
882 (*cp == '#' && !defcmd_in_progress))
883 break;
884
885 if (*cp == '|') {
886 check_grep++;
887 break;
888 }
889 if (cpp >= cbuf + CMD_BUFLEN) {
890 kdb_printf("kdb_parse: command buffer "
891 "overflow, command ignored\n%s\n",
892 cmdstr);
893 return KDB_NOTFOUND;
894 }
895 if (argc >= MAXARGC - 1) {
896 kdb_printf("kdb_parse: too many arguments, "
897 "command ignored\n%s\n", cmdstr);
898 return KDB_NOTFOUND;
899 }
900 argv[argc++] = cpp;
901 escaped = 0;
902 quoted = '\0';
903
904
905 while (*cp && *cp != '\n' &&
906 (escaped || quoted || !isspace(*cp))) {
907 if (cpp >= cbuf + CMD_BUFLEN)
908 break;
909 if (escaped) {
910 escaped = 0;
911 *cpp++ = *cp++;
912 continue;
913 }
914 if (*cp == '\\') {
915 escaped = 1;
916 ++cp;
917 continue;
918 }
919 if (*cp == quoted)
920 quoted = '\0';
921 else if (*cp == '\'' || *cp == '"')
922 quoted = *cp;
923 *cpp = *cp++;
924 if (*cpp == '=' && !quoted)
925 break;
926 ++cpp;
927 }
928 *cpp++ = '\0';
929 }
930 }
931 if (!argc)
932 return 0;
933 if (check_grep)
934 parse_grep(cp);
935 if (defcmd_in_progress) {
936 int result = kdb_defcmd2(cmdstr, argv[0]);
937 if (!defcmd_in_progress) {
938 argc = 0;
939 *(argv[0]) = '\0';
940 }
941 return result;
942 }
943 if (argv[0][0] == '-' && argv[0][1] &&
944 (argv[0][1] < '0' || argv[0][1] > '9')) {
945 ignore_errors = 1;
946 ++argv[0];
947 }
948
949 for_each_kdbcmd(tp, i) {
950 if (tp->cmd_name) {
951
952
953
954
955
956 if (tp->cmd_minlen
957 && (strlen(argv[0]) <= tp->cmd_minlen)) {
958 if (strncmp(argv[0],
959 tp->cmd_name,
960 tp->cmd_minlen) == 0) {
961 break;
962 }
963 }
964
965 if (strcmp(argv[0], tp->cmd_name) == 0)
966 break;
967 }
968 }
969
970
971
972
973
974
975 if (i == kdb_max_commands) {
976 for_each_kdbcmd(tp, i) {
977 if (tp->cmd_name) {
978 if (strncmp(argv[0],
979 tp->cmd_name,
980 strlen(tp->cmd_name)) == 0) {
981 break;
982 }
983 }
984 }
985 }
986
987 if (i < kdb_max_commands) {
988 int result;
989 KDB_STATE_SET(CMD);
990 result = (*tp->cmd_func)(argc-1, (const char **)argv);
991 if (result && ignore_errors && result > KDB_CMD_GO)
992 result = 0;
993 KDB_STATE_CLEAR(CMD);
994 switch (tp->cmd_repeat) {
995 case KDB_REPEAT_NONE:
996 argc = 0;
997 if (argv[0])
998 *(argv[0]) = '\0';
999 break;
1000 case KDB_REPEAT_NO_ARGS:
1001 argc = 1;
1002 if (argv[1])
1003 *(argv[1]) = '\0';
1004 break;
1005 case KDB_REPEAT_WITH_ARGS:
1006 break;
1007 }
1008 return result;
1009 }
1010
1011
1012
1013
1014
1015
1016
1017
1018 {
1019 unsigned long value;
1020 char *name = NULL;
1021 long offset;
1022 int nextarg = 0;
1023
1024 if (kdbgetaddrarg(0, (const char **)argv, &nextarg,
1025 &value, &offset, &name)) {
1026 return KDB_NOTFOUND;
1027 }
1028
1029 kdb_printf("%s = ", argv[0]);
1030 kdb_symbol_print(value, NULL, KDB_SP_DEFAULT);
1031 kdb_printf("\n");
1032 return 0;
1033 }
1034}
1035
1036
1037static int handle_ctrl_cmd(char *cmd)
1038{
1039#define CTRL_P 16
1040#define CTRL_N 14
1041
1042
1043 if (cmd_head == cmd_tail)
1044 return 0;
1045 switch (*cmd) {
1046 case CTRL_P:
1047 if (cmdptr != cmd_tail)
1048 cmdptr = (cmdptr-1) % KDB_CMD_HISTORY_COUNT;
1049 strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
1050 return 1;
1051 case CTRL_N:
1052 if (cmdptr != cmd_head)
1053 cmdptr = (cmdptr+1) % KDB_CMD_HISTORY_COUNT;
1054 strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
1055 return 1;
1056 }
1057 return 0;
1058}
1059
1060
1061
1062
1063
1064static int kdb_reboot(int argc, const char **argv)
1065{
1066 emergency_restart();
1067 kdb_printf("Hmm, kdb_reboot did not reboot, spinning here\n");
1068 while (1)
1069 cpu_relax();
1070
1071 return 0;
1072}
1073
1074static void kdb_dumpregs(struct pt_regs *regs)
1075{
1076 int old_lvl = console_loglevel;
1077 console_loglevel = 15;
1078 kdb_trap_printk++;
1079 show_regs(regs);
1080 kdb_trap_printk--;
1081 kdb_printf("\n");
1082 console_loglevel = old_lvl;
1083}
1084
1085void kdb_set_current_task(struct task_struct *p)
1086{
1087 kdb_current_task = p;
1088
1089 if (kdb_task_has_cpu(p)) {
1090 kdb_current_regs = KDB_TSKREGS(kdb_process_cpu(p));
1091 return;
1092 }
1093 kdb_current_regs = NULL;
1094}
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs,
1117 kdb_dbtrap_t db_result)
1118{
1119 char *cmdbuf;
1120 int diag;
1121 struct task_struct *kdb_current =
1122 kdb_curr_task(raw_smp_processor_id());
1123
1124 KDB_DEBUG_STATE("kdb_local 1", reason);
1125 kdb_go_count = 0;
1126 if (reason == KDB_REASON_DEBUG) {
1127
1128 } else {
1129 kdb_printf("\nEntering kdb (current=0x%p, pid %d) ",
1130 kdb_current, kdb_current ? kdb_current->pid : 0);
1131#if defined(CONFIG_SMP)
1132 kdb_printf("on processor %d ", raw_smp_processor_id());
1133#endif
1134 }
1135
1136 switch (reason) {
1137 case KDB_REASON_DEBUG:
1138 {
1139
1140
1141
1142
1143 switch (db_result) {
1144 case KDB_DB_BPT:
1145 kdb_printf("\nEntering kdb (0x%p, pid %d) ",
1146 kdb_current, kdb_current->pid);
1147#if defined(CONFIG_SMP)
1148 kdb_printf("on processor %d ", raw_smp_processor_id());
1149#endif
1150 kdb_printf("due to Debug @ " kdb_machreg_fmt "\n",
1151 instruction_pointer(regs));
1152 break;
1153 case KDB_DB_SSB:
1154
1155
1156
1157 KDB_DEBUG_STATE("kdb_local 3", reason);
1158 return KDB_CMD_SSB;
1159
1160 break;
1161 case KDB_DB_SS:
1162 break;
1163 case KDB_DB_SSBPT:
1164 KDB_DEBUG_STATE("kdb_local 4", reason);
1165 return 1;
1166 default:
1167 kdb_printf("kdb: Bad result from kdba_db_trap: %d\n",
1168 db_result);
1169 break;
1170 }
1171
1172 }
1173 break;
1174 case KDB_REASON_ENTER:
1175 if (KDB_STATE(KEYBOARD))
1176 kdb_printf("due to Keyboard Entry\n");
1177 else
1178 kdb_printf("due to KDB_ENTER()\n");
1179 break;
1180 case KDB_REASON_KEYBOARD:
1181 KDB_STATE_SET(KEYBOARD);
1182 kdb_printf("due to Keyboard Entry\n");
1183 break;
1184 case KDB_REASON_ENTER_SLAVE:
1185
1186 case KDB_REASON_SWITCH:
1187 kdb_printf("due to cpu switch\n");
1188 break;
1189 case KDB_REASON_OOPS:
1190 kdb_printf("Oops: %s\n", kdb_diemsg);
1191 kdb_printf("due to oops @ " kdb_machreg_fmt "\n",
1192 instruction_pointer(regs));
1193 kdb_dumpregs(regs);
1194 break;
1195 case KDB_REASON_NMI:
1196 kdb_printf("due to NonMaskable Interrupt @ "
1197 kdb_machreg_fmt "\n",
1198 instruction_pointer(regs));
1199 kdb_dumpregs(regs);
1200 break;
1201 case KDB_REASON_SSTEP:
1202 case KDB_REASON_BREAK:
1203 kdb_printf("due to %s @ " kdb_machreg_fmt "\n",
1204 reason == KDB_REASON_BREAK ?
1205 "Breakpoint" : "SS trap", instruction_pointer(regs));
1206
1207
1208
1209
1210 if (db_result != KDB_DB_BPT) {
1211 kdb_printf("kdb: error return from kdba_bp_trap: %d\n",
1212 db_result);
1213 KDB_DEBUG_STATE("kdb_local 6", reason);
1214 return 0;
1215 }
1216 break;
1217 case KDB_REASON_RECURSE:
1218 kdb_printf("due to Recursion @ " kdb_machreg_fmt "\n",
1219 instruction_pointer(regs));
1220 break;
1221 default:
1222 kdb_printf("kdb: unexpected reason code: %d\n", reason);
1223 KDB_DEBUG_STATE("kdb_local 8", reason);
1224 return 0;
1225 }
1226
1227 while (1) {
1228
1229
1230
1231 kdb_nextline = 1;
1232 KDB_STATE_CLEAR(SUPPRESS);
1233
1234 cmdbuf = cmd_cur;
1235 *cmdbuf = '\0';
1236 *(cmd_hist[cmd_head]) = '\0';
1237
1238 if (KDB_FLAG(ONLY_DO_DUMP)) {
1239
1240
1241
1242
1243
1244 const char *setargs[] = { "set", "LOGGING", "1" };
1245 kdb_set(2, setargs);
1246 kdb_reboot(0, NULL);
1247
1248 }
1249
1250do_full_getstr:
1251#if defined(CONFIG_SMP)
1252 snprintf(kdb_prompt_str, CMD_BUFLEN, kdbgetenv("PROMPT"),
1253 raw_smp_processor_id());
1254#else
1255 snprintf(kdb_prompt_str, CMD_BUFLEN, kdbgetenv("PROMPT"));
1256#endif
1257 if (defcmd_in_progress)
1258 strncat(kdb_prompt_str, "[defcmd]", CMD_BUFLEN);
1259
1260
1261
1262
1263 cmdbuf = kdb_getstr(cmdbuf, CMD_BUFLEN, kdb_prompt_str);
1264 if (*cmdbuf != '\n') {
1265 if (*cmdbuf < 32) {
1266 if (cmdptr == cmd_head) {
1267 strncpy(cmd_hist[cmd_head], cmd_cur,
1268 CMD_BUFLEN);
1269 *(cmd_hist[cmd_head] +
1270 strlen(cmd_hist[cmd_head])-1) = '\0';
1271 }
1272 if (!handle_ctrl_cmd(cmdbuf))
1273 *(cmd_cur+strlen(cmd_cur)-1) = '\0';
1274 cmdbuf = cmd_cur;
1275 goto do_full_getstr;
1276 } else {
1277 strncpy(cmd_hist[cmd_head], cmd_cur,
1278 CMD_BUFLEN);
1279 }
1280
1281 cmd_head = (cmd_head+1) % KDB_CMD_HISTORY_COUNT;
1282 if (cmd_head == cmd_tail)
1283 cmd_tail = (cmd_tail+1) % KDB_CMD_HISTORY_COUNT;
1284 }
1285
1286 cmdptr = cmd_head;
1287 diag = kdb_parse(cmdbuf);
1288 if (diag == KDB_NOTFOUND) {
1289 kdb_printf("Unknown kdb command: '%s'\n", cmdbuf);
1290 diag = 0;
1291 }
1292 if (diag == KDB_CMD_GO
1293 || diag == KDB_CMD_CPU
1294 || diag == KDB_CMD_SS
1295 || diag == KDB_CMD_SSB
1296 || diag == KDB_CMD_KGDB)
1297 break;
1298
1299 if (diag)
1300 kdb_cmderror(diag);
1301 }
1302 KDB_DEBUG_STATE("kdb_local 9", diag);
1303 return diag;
1304}
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314void kdb_print_state(const char *text, int value)
1315{
1316 kdb_printf("state: %s cpu %d value %d initial %d state %x\n",
1317 text, raw_smp_processor_id(), value, kdb_initial_cpu,
1318 kdb_state);
1319}
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346int kdb_main_loop(kdb_reason_t reason, kdb_reason_t reason2, int error,
1347 kdb_dbtrap_t db_result, struct pt_regs *regs)
1348{
1349 int result = 1;
1350
1351 while (1) {
1352
1353
1354
1355
1356 KDB_DEBUG_STATE("kdb_main_loop 1", reason);
1357 while (KDB_STATE(HOLD_CPU)) {
1358
1359
1360
1361
1362 if (!KDB_STATE(KDB))
1363 KDB_STATE_SET(KDB);
1364 }
1365
1366 KDB_STATE_CLEAR(SUPPRESS);
1367 KDB_DEBUG_STATE("kdb_main_loop 2", reason);
1368 if (KDB_STATE(LEAVING))
1369 break;
1370
1371 result = kdb_local(reason2, error, regs, db_result);
1372 KDB_DEBUG_STATE("kdb_main_loop 3", result);
1373
1374 if (result == KDB_CMD_CPU)
1375 break;
1376
1377 if (result == KDB_CMD_SS) {
1378 KDB_STATE_SET(DOING_SS);
1379 break;
1380 }
1381
1382 if (result == KDB_CMD_SSB) {
1383 KDB_STATE_SET(DOING_SS);
1384 KDB_STATE_SET(DOING_SSB);
1385 break;
1386 }
1387
1388 if (result == KDB_CMD_KGDB) {
1389 if (!(KDB_STATE(DOING_KGDB) || KDB_STATE(DOING_KGDB2)))
1390 kdb_printf("Entering please attach debugger "
1391 "or use $D#44+ or $3#33\n");
1392 break;
1393 }
1394 if (result && result != 1 && result != KDB_CMD_GO)
1395 kdb_printf("\nUnexpected kdb_local return code %d\n",
1396 result);
1397 KDB_DEBUG_STATE("kdb_main_loop 4", reason);
1398 break;
1399 }
1400 if (KDB_STATE(DOING_SS))
1401 KDB_STATE_CLEAR(SSBPT);
1402
1403 return result;
1404}
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416static int kdb_mdr(unsigned long addr, unsigned int count)
1417{
1418 unsigned char c;
1419 while (count--) {
1420 if (kdb_getarea(c, addr))
1421 return 0;
1422 kdb_printf("%02x", c);
1423 addr++;
1424 }
1425 kdb_printf("\n");
1426 return 0;
1427}
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439static void kdb_md_line(const char *fmtstr, unsigned long addr,
1440 int symbolic, int nosect, int bytesperword,
1441 int num, int repeat, int phys)
1442{
1443
1444 kdb_symtab_t symtab;
1445 char cbuf[32];
1446 char *c = cbuf;
1447 int i;
1448 unsigned long word;
1449
1450 memset(cbuf, '\0', sizeof(cbuf));
1451 if (phys)
1452 kdb_printf("phys " kdb_machreg_fmt0 " ", addr);
1453 else
1454 kdb_printf(kdb_machreg_fmt0 " ", addr);
1455
1456 for (i = 0; i < num && repeat--; i++) {
1457 if (phys) {
1458 if (kdb_getphysword(&word, addr, bytesperword))
1459 break;
1460 } else if (kdb_getword(&word, addr, bytesperword))
1461 break;
1462 kdb_printf(fmtstr, word);
1463 if (symbolic)
1464 kdbnearsym(word, &symtab);
1465 else
1466 memset(&symtab, 0, sizeof(symtab));
1467 if (symtab.sym_name) {
1468 kdb_symbol_print(word, &symtab, 0);
1469 if (!nosect) {
1470 kdb_printf("\n");
1471 kdb_printf(" %s %s "
1472 kdb_machreg_fmt " "
1473 kdb_machreg_fmt " "
1474 kdb_machreg_fmt, symtab.mod_name,
1475 symtab.sec_name, symtab.sec_start,
1476 symtab.sym_start, symtab.sym_end);
1477 }
1478 addr += bytesperword;
1479 } else {
1480 union {
1481 u64 word;
1482 unsigned char c[8];
1483 } wc;
1484 unsigned char *cp;
1485#ifdef __BIG_ENDIAN
1486 cp = wc.c + 8 - bytesperword;
1487#else
1488 cp = wc.c;
1489#endif
1490 wc.word = word;
1491#define printable_char(c) \
1492 ({unsigned char __c = c; isascii(__c) && isprint(__c) ? __c : '.'; })
1493 switch (bytesperword) {
1494 case 8:
1495 *c++ = printable_char(*cp++);
1496 *c++ = printable_char(*cp++);
1497 *c++ = printable_char(*cp++);
1498 *c++ = printable_char(*cp++);
1499 addr += 4;
1500 case 4:
1501 *c++ = printable_char(*cp++);
1502 *c++ = printable_char(*cp++);
1503 addr += 2;
1504 case 2:
1505 *c++ = printable_char(*cp++);
1506 addr++;
1507 case 1:
1508 *c++ = printable_char(*cp++);
1509 addr++;
1510 break;
1511 }
1512#undef printable_char
1513 }
1514 }
1515 kdb_printf("%*s %s\n", (int)((num-i)*(2*bytesperword + 1)+1),
1516 " ", cbuf);
1517}
1518
1519static int kdb_md(int argc, const char **argv)
1520{
1521 static unsigned long last_addr;
1522 static int last_radix, last_bytesperword, last_repeat;
1523 int radix = 16, mdcount = 8, bytesperword = KDB_WORD_SIZE, repeat;
1524 int nosect = 0;
1525 char fmtchar, fmtstr[64];
1526 unsigned long addr;
1527 unsigned long word;
1528 long offset = 0;
1529 int symbolic = 0;
1530 int valid = 0;
1531 int phys = 0;
1532
1533 kdbgetintenv("MDCOUNT", &mdcount);
1534 kdbgetintenv("RADIX", &radix);
1535 kdbgetintenv("BYTESPERWORD", &bytesperword);
1536
1537
1538 repeat = mdcount * 16 / bytesperword;
1539
1540 if (strcmp(argv[0], "mdr") == 0) {
1541 if (argc != 2)
1542 return KDB_ARGCOUNT;
1543 valid = 1;
1544 } else if (isdigit(argv[0][2])) {
1545 bytesperword = (int)(argv[0][2] - '0');
1546 if (bytesperword == 0) {
1547 bytesperword = last_bytesperword;
1548 if (bytesperword == 0)
1549 bytesperword = 4;
1550 }
1551 last_bytesperword = bytesperword;
1552 repeat = mdcount * 16 / bytesperword;
1553 if (!argv[0][3])
1554 valid = 1;
1555 else if (argv[0][3] == 'c' && argv[0][4]) {
1556 char *p;
1557 repeat = simple_strtoul(argv[0] + 4, &p, 10);
1558 mdcount = ((repeat * bytesperword) + 15) / 16;
1559 valid = !*p;
1560 }
1561 last_repeat = repeat;
1562 } else if (strcmp(argv[0], "md") == 0)
1563 valid = 1;
1564 else if (strcmp(argv[0], "mds") == 0)
1565 valid = 1;
1566 else if (strcmp(argv[0], "mdp") == 0) {
1567 phys = valid = 1;
1568 }
1569 if (!valid)
1570 return KDB_NOTFOUND;
1571
1572 if (argc == 0) {
1573 if (last_addr == 0)
1574 return KDB_ARGCOUNT;
1575 addr = last_addr;
1576 radix = last_radix;
1577 bytesperword = last_bytesperword;
1578 repeat = last_repeat;
1579 mdcount = ((repeat * bytesperword) + 15) / 16;
1580 }
1581
1582 if (argc) {
1583 unsigned long val;
1584 int diag, nextarg = 1;
1585 diag = kdbgetaddrarg(argc, argv, &nextarg, &addr,
1586 &offset, NULL);
1587 if (diag)
1588 return diag;
1589 if (argc > nextarg+2)
1590 return KDB_ARGCOUNT;
1591
1592 if (argc >= nextarg) {
1593 diag = kdbgetularg(argv[nextarg], &val);
1594 if (!diag) {
1595 mdcount = (int) val;
1596 repeat = mdcount * 16 / bytesperword;
1597 }
1598 }
1599 if (argc >= nextarg+1) {
1600 diag = kdbgetularg(argv[nextarg+1], &val);
1601 if (!diag)
1602 radix = (int) val;
1603 }
1604 }
1605
1606 if (strcmp(argv[0], "mdr") == 0)
1607 return kdb_mdr(addr, mdcount);
1608
1609 switch (radix) {
1610 case 10:
1611 fmtchar = 'd';
1612 break;
1613 case 16:
1614 fmtchar = 'x';
1615 break;
1616 case 8:
1617 fmtchar = 'o';
1618 break;
1619 default:
1620 return KDB_BADRADIX;
1621 }
1622
1623 last_radix = radix;
1624
1625 if (bytesperword > KDB_WORD_SIZE)
1626 return KDB_BADWIDTH;
1627
1628 switch (bytesperword) {
1629 case 8:
1630 sprintf(fmtstr, "%%16.16l%c ", fmtchar);
1631 break;
1632 case 4:
1633 sprintf(fmtstr, "%%8.8l%c ", fmtchar);
1634 break;
1635 case 2:
1636 sprintf(fmtstr, "%%4.4l%c ", fmtchar);
1637 break;
1638 case 1:
1639 sprintf(fmtstr, "%%2.2l%c ", fmtchar);
1640 break;
1641 default:
1642 return KDB_BADWIDTH;
1643 }
1644
1645 last_repeat = repeat;
1646 last_bytesperword = bytesperword;
1647
1648 if (strcmp(argv[0], "mds") == 0) {
1649 symbolic = 1;
1650
1651
1652
1653 bytesperword = KDB_WORD_SIZE;
1654 repeat = mdcount;
1655 kdbgetintenv("NOSECT", &nosect);
1656 }
1657
1658
1659
1660 addr &= ~(bytesperword-1);
1661
1662 while (repeat > 0) {
1663 unsigned long a;
1664 int n, z, num = (symbolic ? 1 : (16 / bytesperword));
1665
1666 if (KDB_FLAG(CMD_INTERRUPT))
1667 return 0;
1668 for (a = addr, z = 0; z < repeat; a += bytesperword, ++z) {
1669 if (phys) {
1670 if (kdb_getphysword(&word, a, bytesperword)
1671 || word)
1672 break;
1673 } else if (kdb_getword(&word, a, bytesperword) || word)
1674 break;
1675 }
1676 n = min(num, repeat);
1677 kdb_md_line(fmtstr, addr, symbolic, nosect, bytesperword,
1678 num, repeat, phys);
1679 addr += bytesperword * n;
1680 repeat -= n;
1681 z = (z + num - 1) / num;
1682 if (z > 2) {
1683 int s = num * (z-2);
1684 kdb_printf(kdb_machreg_fmt0 "-" kdb_machreg_fmt0
1685 " zero suppressed\n",
1686 addr, addr + bytesperword * s - 1);
1687 addr += bytesperword * s;
1688 repeat -= s;
1689 }
1690 }
1691 last_addr = addr;
1692
1693 return 0;
1694}
1695
1696
1697
1698
1699
1700
1701
1702static int kdb_mm(int argc, const char **argv)
1703{
1704 int diag;
1705 unsigned long addr;
1706 long offset = 0;
1707 unsigned long contents;
1708 int nextarg;
1709 int width;
1710
1711 if (argv[0][2] && !isdigit(argv[0][2]))
1712 return KDB_NOTFOUND;
1713
1714 if (argc < 2)
1715 return KDB_ARGCOUNT;
1716
1717 nextarg = 1;
1718 diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL);
1719 if (diag)
1720 return diag;
1721
1722 if (nextarg > argc)
1723 return KDB_ARGCOUNT;
1724 diag = kdbgetaddrarg(argc, argv, &nextarg, &contents, NULL, NULL);
1725 if (diag)
1726 return diag;
1727
1728 if (nextarg != argc + 1)
1729 return KDB_ARGCOUNT;
1730
1731 width = argv[0][2] ? (argv[0][2] - '0') : (KDB_WORD_SIZE);
1732 diag = kdb_putword(addr, contents, width);
1733 if (diag)
1734 return diag;
1735
1736 kdb_printf(kdb_machreg_fmt " = " kdb_machreg_fmt "\n", addr, contents);
1737
1738 return 0;
1739}
1740
1741
1742
1743
1744
1745static int kdb_go(int argc, const char **argv)
1746{
1747 unsigned long addr;
1748 int diag;
1749 int nextarg;
1750 long offset;
1751
1752 if (raw_smp_processor_id() != kdb_initial_cpu) {
1753 kdb_printf("go must execute on the entry cpu, "
1754 "please use \"cpu %d\" and then execute go\n",
1755 kdb_initial_cpu);
1756 return KDB_BADCPUNUM;
1757 }
1758 if (argc == 1) {
1759 nextarg = 1;
1760 diag = kdbgetaddrarg(argc, argv, &nextarg,
1761 &addr, &offset, NULL);
1762 if (diag)
1763 return diag;
1764 } else if (argc) {
1765 return KDB_ARGCOUNT;
1766 }
1767
1768 diag = KDB_CMD_GO;
1769 if (KDB_FLAG(CATASTROPHIC)) {
1770 kdb_printf("Catastrophic error detected\n");
1771 kdb_printf("kdb_continue_catastrophic=%d, ",
1772 kdb_continue_catastrophic);
1773 if (kdb_continue_catastrophic == 0 && kdb_go_count++ == 0) {
1774 kdb_printf("type go a second time if you really want "
1775 "to continue\n");
1776 return 0;
1777 }
1778 if (kdb_continue_catastrophic == 2) {
1779 kdb_printf("forcing reboot\n");
1780 kdb_reboot(0, NULL);
1781 }
1782 kdb_printf("attempting to continue\n");
1783 }
1784 return diag;
1785}
1786
1787
1788
1789
1790static int kdb_rd(int argc, const char **argv)
1791{
1792 int len = kdb_check_regs();
1793#if DBG_MAX_REG_NUM > 0
1794 int i;
1795 char *rname;
1796 int rsize;
1797 u64 reg64;
1798 u32 reg32;
1799 u16 reg16;
1800 u8 reg8;
1801
1802 if (len)
1803 return len;
1804
1805 for (i = 0; i < DBG_MAX_REG_NUM; i++) {
1806 rsize = dbg_reg_def[i].size * 2;
1807 if (rsize > 16)
1808 rsize = 2;
1809 if (len + strlen(dbg_reg_def[i].name) + 4 + rsize > 80) {
1810 len = 0;
1811 kdb_printf("\n");
1812 }
1813 if (len)
1814 len += kdb_printf(" ");
1815 switch(dbg_reg_def[i].size * 8) {
1816 case 8:
1817 rname = dbg_get_reg(i, ®8, kdb_current_regs);
1818 if (!rname)
1819 break;
1820 len += kdb_printf("%s: %02x", rname, reg8);
1821 break;
1822 case 16:
1823 rname = dbg_get_reg(i, ®16, kdb_current_regs);
1824 if (!rname)
1825 break;
1826 len += kdb_printf("%s: %04x", rname, reg16);
1827 break;
1828 case 32:
1829 rname = dbg_get_reg(i, ®32, kdb_current_regs);
1830 if (!rname)
1831 break;
1832 len += kdb_printf("%s: %08x", rname, reg32);
1833 break;
1834 case 64:
1835 rname = dbg_get_reg(i, ®64, kdb_current_regs);
1836 if (!rname)
1837 break;
1838 len += kdb_printf("%s: %016llx", rname, reg64);
1839 break;
1840 default:
1841 len += kdb_printf("%s: ??", dbg_reg_def[i].name);
1842 }
1843 }
1844 kdb_printf("\n");
1845#else
1846 if (len)
1847 return len;
1848
1849 kdb_dumpregs(kdb_current_regs);
1850#endif
1851 return 0;
1852}
1853
1854
1855
1856
1857
1858
1859
1860static int kdb_rm(int argc, const char **argv)
1861{
1862#if DBG_MAX_REG_NUM > 0
1863 int diag;
1864 const char *rname;
1865 int i;
1866 u64 reg64;
1867 u32 reg32;
1868 u16 reg16;
1869 u8 reg8;
1870
1871 if (argc != 2)
1872 return KDB_ARGCOUNT;
1873
1874
1875
1876 rname = argv[1];
1877 if (*rname == '%')
1878 rname++;
1879
1880 diag = kdbgetu64arg(argv[2], ®64);
1881 if (diag)
1882 return diag;
1883
1884 diag = kdb_check_regs();
1885 if (diag)
1886 return diag;
1887
1888 diag = KDB_BADREG;
1889 for (i = 0; i < DBG_MAX_REG_NUM; i++) {
1890 if (strcmp(rname, dbg_reg_def[i].name) == 0) {
1891 diag = 0;
1892 break;
1893 }
1894 }
1895 if (!diag) {
1896 switch(dbg_reg_def[i].size * 8) {
1897 case 8:
1898 reg8 = reg64;
1899 dbg_set_reg(i, ®8, kdb_current_regs);
1900 break;
1901 case 16:
1902 reg16 = reg64;
1903 dbg_set_reg(i, ®16, kdb_current_regs);
1904 break;
1905 case 32:
1906 reg32 = reg64;
1907 dbg_set_reg(i, ®32, kdb_current_regs);
1908 break;
1909 case 64:
1910 dbg_set_reg(i, ®64, kdb_current_regs);
1911 break;
1912 }
1913 }
1914 return diag;
1915#else
1916 kdb_printf("ERROR: Register set currently not implemented\n");
1917 return 0;
1918#endif
1919}
1920
1921#if defined(CONFIG_MAGIC_SYSRQ)
1922
1923
1924
1925
1926
1927static int kdb_sr(int argc, const char **argv)
1928{
1929 if (argc != 1)
1930 return KDB_ARGCOUNT;
1931 kdb_trap_printk++;
1932 __handle_sysrq(*argv[1], false);
1933 kdb_trap_printk--;
1934
1935 return 0;
1936}
1937#endif
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948static int kdb_ef(int argc, const char **argv)
1949{
1950 int diag;
1951 unsigned long addr;
1952 long offset;
1953 int nextarg;
1954
1955 if (argc != 1)
1956 return KDB_ARGCOUNT;
1957
1958 nextarg = 1;
1959 diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL);
1960 if (diag)
1961 return diag;
1962 show_regs((struct pt_regs *)addr);
1963 return 0;
1964}
1965
1966#if defined(CONFIG_MODULES)
1967
1968
1969
1970
1971
1972static int kdb_lsmod(int argc, const char **argv)
1973{
1974 struct module *mod;
1975
1976 if (argc != 0)
1977 return KDB_ARGCOUNT;
1978
1979 kdb_printf("Module Size modstruct Used by\n");
1980 list_for_each_entry(mod, kdb_modules, list) {
1981
1982 kdb_printf("%-20s%8u 0x%p ", mod->name,
1983 mod->core_size, (void *)mod);
1984#ifdef CONFIG_MODULE_UNLOAD
1985 kdb_printf("%4d ", module_refcount(mod));
1986#endif
1987 if (mod->state == MODULE_STATE_GOING)
1988 kdb_printf(" (Unloading)");
1989 else if (mod->state == MODULE_STATE_COMING)
1990 kdb_printf(" (Loading)");
1991 else
1992 kdb_printf(" (Live)");
1993 kdb_printf(" 0x%p", mod->module_core);
1994
1995#ifdef CONFIG_MODULE_UNLOAD
1996 {
1997 struct module_use *use;
1998 kdb_printf(" [ ");
1999 list_for_each_entry(use, &mod->source_list,
2000 source_list)
2001 kdb_printf("%s ", use->target->name);
2002 kdb_printf("]\n");
2003 }
2004#endif
2005 }
2006
2007 return 0;
2008}
2009
2010#endif
2011
2012
2013
2014
2015
2016
2017static int kdb_env(int argc, const char **argv)
2018{
2019 int i;
2020
2021 for (i = 0; i < __nenv; i++) {
2022 if (__env[i])
2023 kdb_printf("%s\n", __env[i]);
2024 }
2025
2026 if (KDB_DEBUG(MASK))
2027 kdb_printf("KDBFLAGS=0x%x\n", kdb_flags);
2028
2029 return 0;
2030}
2031
2032#ifdef CONFIG_PRINTK
2033
2034
2035
2036
2037
2038static int kdb_dmesg(int argc, const char **argv)
2039{
2040 char *syslog_data[4], *start, *end, c = '\0', *p;
2041 int diag, logging, logsize, lines = 0, adjust = 0, n;
2042
2043 if (argc > 2)
2044 return KDB_ARGCOUNT;
2045 if (argc) {
2046 char *cp;
2047 lines = simple_strtol(argv[1], &cp, 0);
2048 if (*cp)
2049 lines = 0;
2050 if (argc > 1) {
2051 adjust = simple_strtoul(argv[2], &cp, 0);
2052 if (*cp || adjust < 0)
2053 adjust = 0;
2054 }
2055 }
2056
2057
2058 diag = kdbgetintenv("LOGGING", &logging);
2059 if (!diag && logging) {
2060 const char *setargs[] = { "set", "LOGGING", "0" };
2061 kdb_set(2, setargs);
2062 }
2063
2064
2065
2066 kdb_syslog_data(syslog_data);
2067 if (syslog_data[2] == syslog_data[3])
2068 return 0;
2069 logsize = syslog_data[1] - syslog_data[0];
2070 start = syslog_data[2];
2071 end = syslog_data[3];
2072#define KDB_WRAP(p) (((p - syslog_data[0]) % logsize) + syslog_data[0])
2073 for (n = 0, p = start; p < end; ++p) {
2074 c = *KDB_WRAP(p);
2075 if (c == '\n')
2076 ++n;
2077 }
2078 if (c != '\n')
2079 ++n;
2080 if (lines < 0) {
2081 if (adjust >= n)
2082 kdb_printf("buffer only contains %d lines, nothing "
2083 "printed\n", n);
2084 else if (adjust - lines >= n)
2085 kdb_printf("buffer only contains %d lines, last %d "
2086 "lines printed\n", n, n - adjust);
2087 if (adjust) {
2088 for (; start < end && adjust; ++start) {
2089 if (*KDB_WRAP(start) == '\n')
2090 --adjust;
2091 }
2092 if (start < end)
2093 ++start;
2094 }
2095 for (p = start; p < end && lines; ++p) {
2096 if (*KDB_WRAP(p) == '\n')
2097 ++lines;
2098 }
2099 end = p;
2100 } else if (lines > 0) {
2101 int skip = n - (adjust + lines);
2102 if (adjust >= n) {
2103 kdb_printf("buffer only contains %d lines, "
2104 "nothing printed\n", n);
2105 skip = n;
2106 } else if (skip < 0) {
2107 lines += skip;
2108 skip = 0;
2109 kdb_printf("buffer only contains %d lines, first "
2110 "%d lines printed\n", n, lines);
2111 }
2112 for (; start < end && skip; ++start) {
2113 if (*KDB_WRAP(start) == '\n')
2114 --skip;
2115 }
2116 for (p = start; p < end && lines; ++p) {
2117 if (*KDB_WRAP(p) == '\n')
2118 --lines;
2119 }
2120 end = p;
2121 }
2122
2123 c = '\n';
2124 while (start != end) {
2125 char buf[201];
2126 p = buf;
2127 if (KDB_FLAG(CMD_INTERRUPT))
2128 return 0;
2129 while (start < end && (c = *KDB_WRAP(start)) &&
2130 (p - buf) < sizeof(buf)-1) {
2131 ++start;
2132 *p++ = c;
2133 if (c == '\n')
2134 break;
2135 }
2136 *p = '\0';
2137 kdb_printf("%s", buf);
2138 }
2139 if (c != '\n')
2140 kdb_printf("\n");
2141
2142 return 0;
2143}
2144#endif
2145
2146
2147
2148
2149
2150
2151static void kdb_cpu_status(void)
2152{
2153 int i, start_cpu, first_print = 1;
2154 char state, prev_state = '?';
2155
2156 kdb_printf("Currently on cpu %d\n", raw_smp_processor_id());
2157 kdb_printf("Available cpus: ");
2158 for (start_cpu = -1, i = 0; i < NR_CPUS; i++) {
2159 if (!cpu_online(i)) {
2160 state = 'F';
2161 } else {
2162 state = ' ';
2163 if (kdb_task_state_char(KDB_TSK(i)) == 'I')
2164 state = 'I';
2165 }
2166 if (state != prev_state) {
2167 if (prev_state != '?') {
2168 if (!first_print)
2169 kdb_printf(", ");
2170 first_print = 0;
2171 kdb_printf("%d", start_cpu);
2172 if (start_cpu < i-1)
2173 kdb_printf("-%d", i-1);
2174 if (prev_state != ' ')
2175 kdb_printf("(%c)", prev_state);
2176 }
2177 prev_state = state;
2178 start_cpu = i;
2179 }
2180 }
2181
2182 if (prev_state != 'F') {
2183 if (!first_print)
2184 kdb_printf(", ");
2185 kdb_printf("%d", start_cpu);
2186 if (start_cpu < i-1)
2187 kdb_printf("-%d", i-1);
2188 if (prev_state != ' ')
2189 kdb_printf("(%c)", prev_state);
2190 }
2191 kdb_printf("\n");
2192}
2193
2194static int kdb_cpu(int argc, const char **argv)
2195{
2196 unsigned long cpunum;
2197 int diag;
2198
2199 if (argc == 0) {
2200 kdb_cpu_status();
2201 return 0;
2202 }
2203
2204 if (argc != 1)
2205 return KDB_ARGCOUNT;
2206
2207 diag = kdbgetularg(argv[1], &cpunum);
2208 if (diag)
2209 return diag;
2210
2211
2212
2213
2214 if ((cpunum > NR_CPUS) || !cpu_online(cpunum))
2215 return KDB_BADCPUNUM;
2216
2217 dbg_switch_cpu = cpunum;
2218
2219
2220
2221
2222 return KDB_CMD_CPU;
2223}
2224
2225
2226
2227
2228void kdb_ps_suppressed(void)
2229{
2230 int idle = 0, daemon = 0;
2231 unsigned long mask_I = kdb_task_state_string("I"),
2232 mask_M = kdb_task_state_string("M");
2233 unsigned long cpu;
2234 const struct task_struct *p, *g;
2235 for_each_online_cpu(cpu) {
2236 p = kdb_curr_task(cpu);
2237 if (kdb_task_state(p, mask_I))
2238 ++idle;
2239 }
2240 kdb_do_each_thread(g, p) {
2241 if (kdb_task_state(p, mask_M))
2242 ++daemon;
2243 } kdb_while_each_thread(g, p);
2244 if (idle || daemon) {
2245 if (idle)
2246 kdb_printf("%d idle process%s (state I)%s\n",
2247 idle, idle == 1 ? "" : "es",
2248 daemon ? " and " : "");
2249 if (daemon)
2250 kdb_printf("%d sleeping system daemon (state M) "
2251 "process%s", daemon,
2252 daemon == 1 ? "" : "es");
2253 kdb_printf(" suppressed,\nuse 'ps A' to see all.\n");
2254 }
2255}
2256
2257
2258
2259
2260
2261
2262void kdb_ps1(const struct task_struct *p)
2263{
2264 int cpu;
2265 unsigned long tmp;
2266
2267 if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long)))
2268 return;
2269
2270 cpu = kdb_process_cpu(p);
2271 kdb_printf("0x%p %8d %8d %d %4d %c 0x%p %c%s\n",
2272 (void *)p, p->pid, p->parent->pid,
2273 kdb_task_has_cpu(p), kdb_process_cpu(p),
2274 kdb_task_state_char(p),
2275 (void *)(&p->thread),
2276 p == kdb_curr_task(raw_smp_processor_id()) ? '*' : ' ',
2277 p->comm);
2278 if (kdb_task_has_cpu(p)) {
2279 if (!KDB_TSK(cpu)) {
2280 kdb_printf(" Error: no saved data for this cpu\n");
2281 } else {
2282 if (KDB_TSK(cpu) != p)
2283 kdb_printf(" Error: does not match running "
2284 "process table (0x%p)\n", KDB_TSK(cpu));
2285 }
2286 }
2287}
2288
2289static int kdb_ps(int argc, const char **argv)
2290{
2291 struct task_struct *g, *p;
2292 unsigned long mask, cpu;
2293
2294 if (argc == 0)
2295 kdb_ps_suppressed();
2296 kdb_printf("%-*s Pid Parent [*] cpu State %-*s Command\n",
2297 (int)(2*sizeof(void *))+2, "Task Addr",
2298 (int)(2*sizeof(void *))+2, "Thread");
2299 mask = kdb_task_state_string(argc ? argv[1] : NULL);
2300
2301 for_each_online_cpu(cpu) {
2302 if (KDB_FLAG(CMD_INTERRUPT))
2303 return 0;
2304 p = kdb_curr_task(cpu);
2305 if (kdb_task_state(p, mask))
2306 kdb_ps1(p);
2307 }
2308 kdb_printf("\n");
2309
2310 kdb_do_each_thread(g, p) {
2311 if (KDB_FLAG(CMD_INTERRUPT))
2312 return 0;
2313 if (kdb_task_state(p, mask))
2314 kdb_ps1(p);
2315 } kdb_while_each_thread(g, p);
2316
2317 return 0;
2318}
2319
2320
2321
2322
2323
2324
2325static int kdb_pid(int argc, const char **argv)
2326{
2327 struct task_struct *p;
2328 unsigned long val;
2329 int diag;
2330
2331 if (argc > 1)
2332 return KDB_ARGCOUNT;
2333
2334 if (argc) {
2335 if (strcmp(argv[1], "R") == 0) {
2336 p = KDB_TSK(kdb_initial_cpu);
2337 } else {
2338 diag = kdbgetularg(argv[1], &val);
2339 if (diag)
2340 return KDB_BADINT;
2341
2342 p = find_task_by_pid_ns((pid_t)val, &init_pid_ns);
2343 if (!p) {
2344 kdb_printf("No task with pid=%d\n", (pid_t)val);
2345 return 0;
2346 }
2347 }
2348 kdb_set_current_task(p);
2349 }
2350 kdb_printf("KDB current process is %s(pid=%d)\n",
2351 kdb_current_task->comm,
2352 kdb_current_task->pid);
2353
2354 return 0;
2355}
2356
2357
2358
2359
2360
2361
2362static int kdb_ll(int argc, const char **argv)
2363{
2364 int diag = 0;
2365 unsigned long addr;
2366 long offset = 0;
2367 unsigned long va;
2368 unsigned long linkoffset;
2369 int nextarg;
2370 const char *command;
2371
2372 if (argc != 3)
2373 return KDB_ARGCOUNT;
2374
2375 nextarg = 1;
2376 diag = kdbgetaddrarg(argc, argv, &nextarg, &addr, &offset, NULL);
2377 if (diag)
2378 return diag;
2379
2380 diag = kdbgetularg(argv[2], &linkoffset);
2381 if (diag)
2382 return diag;
2383
2384
2385
2386
2387
2388
2389
2390 va = addr;
2391 command = kdb_strdup(argv[3], GFP_KDB);
2392 if (!command) {
2393 kdb_printf("%s: cannot duplicate command\n", __func__);
2394 return 0;
2395 }
2396
2397 argv = NULL;
2398
2399 while (va) {
2400 char buf[80];
2401
2402 if (KDB_FLAG(CMD_INTERRUPT))
2403 goto out;
2404
2405 sprintf(buf, "%s " kdb_machreg_fmt "\n", command, va);
2406 diag = kdb_parse(buf);
2407 if (diag)
2408 goto out;
2409
2410 addr = va + linkoffset;
2411 if (kdb_getword(&va, addr, sizeof(va)))
2412 goto out;
2413 }
2414
2415out:
2416 kfree(command);
2417 return diag;
2418}
2419
2420static int kdb_kgdb(int argc, const char **argv)
2421{
2422 return KDB_CMD_KGDB;
2423}
2424
2425
2426
2427
2428static int kdb_help(int argc, const char **argv)
2429{
2430 kdbtab_t *kt;
2431 int i;
2432
2433 kdb_printf("%-15.15s %-20.20s %s\n", "Command", "Usage", "Description");
2434 kdb_printf("-----------------------------"
2435 "-----------------------------\n");
2436 for_each_kdbcmd(kt, i) {
2437 if (kt->cmd_name)
2438 kdb_printf("%-15.15s %-20.20s %s\n", kt->cmd_name,
2439 kt->cmd_usage, kt->cmd_help);
2440 if (KDB_FLAG(CMD_INTERRUPT))
2441 return 0;
2442 }
2443 return 0;
2444}
2445
2446
2447
2448
2449static int kdb_kill(int argc, const char **argv)
2450{
2451 long sig, pid;
2452 char *endp;
2453 struct task_struct *p;
2454 struct siginfo info;
2455
2456 if (argc != 2)
2457 return KDB_ARGCOUNT;
2458
2459 sig = simple_strtol(argv[1], &endp, 0);
2460 if (*endp)
2461 return KDB_BADINT;
2462 if (sig >= 0) {
2463 kdb_printf("Invalid signal parameter.<-signal>\n");
2464 return 0;
2465 }
2466 sig = -sig;
2467
2468 pid = simple_strtol(argv[2], &endp, 0);
2469 if (*endp)
2470 return KDB_BADINT;
2471 if (pid <= 0) {
2472 kdb_printf("Process ID must be large than 0.\n");
2473 return 0;
2474 }
2475
2476
2477 p = find_task_by_pid_ns(pid, &init_pid_ns);
2478 if (!p) {
2479 kdb_printf("The specified process isn't found.\n");
2480 return 0;
2481 }
2482 p = p->group_leader;
2483 info.si_signo = sig;
2484 info.si_errno = 0;
2485 info.si_code = SI_USER;
2486 info.si_pid = pid;
2487 info.si_uid = 0;
2488 kdb_send_sig_info(p, &info);
2489 return 0;
2490}
2491
2492struct kdb_tm {
2493 int tm_sec;
2494 int tm_min;
2495 int tm_hour;
2496 int tm_mday;
2497 int tm_mon;
2498 int tm_year;
2499};
2500
2501static void kdb_gmtime(struct timespec *tv, struct kdb_tm *tm)
2502{
2503
2504 static int mon_day[] = { 31, 29, 31, 30, 31, 30, 31,
2505 31, 30, 31, 30, 31 };
2506 memset(tm, 0, sizeof(*tm));
2507 tm->tm_sec = tv->tv_sec % (24 * 60 * 60);
2508 tm->tm_mday = tv->tv_sec / (24 * 60 * 60) +
2509 (2 * 365 + 1);
2510 tm->tm_min = tm->tm_sec / 60 % 60;
2511 tm->tm_hour = tm->tm_sec / 60 / 60;
2512 tm->tm_sec = tm->tm_sec % 60;
2513 tm->tm_year = 68 + 4*(tm->tm_mday / (4*365+1));
2514 tm->tm_mday %= (4*365+1);
2515 mon_day[1] = 29;
2516 while (tm->tm_mday >= mon_day[tm->tm_mon]) {
2517 tm->tm_mday -= mon_day[tm->tm_mon];
2518 if (++tm->tm_mon == 12) {
2519 tm->tm_mon = 0;
2520 ++tm->tm_year;
2521 mon_day[1] = 28;
2522 }
2523 }
2524 ++tm->tm_mday;
2525}
2526
2527
2528
2529
2530
2531
2532static void kdb_sysinfo(struct sysinfo *val)
2533{
2534 struct timespec uptime;
2535 do_posix_clock_monotonic_gettime(&uptime);
2536 memset(val, 0, sizeof(*val));
2537 val->uptime = uptime.tv_sec;
2538 val->loads[0] = avenrun[0];
2539 val->loads[1] = avenrun[1];
2540 val->loads[2] = avenrun[2];
2541 val->procs = nr_threads-1;
2542 si_meminfo(val);
2543
2544 return;
2545}
2546
2547
2548
2549
2550static int kdb_summary(int argc, const char **argv)
2551{
2552 struct timespec now;
2553 struct kdb_tm tm;
2554 struct sysinfo val;
2555
2556 if (argc)
2557 return KDB_ARGCOUNT;
2558
2559 kdb_printf("sysname %s\n", init_uts_ns.name.sysname);
2560 kdb_printf("release %s\n", init_uts_ns.name.release);
2561 kdb_printf("version %s\n", init_uts_ns.name.version);
2562 kdb_printf("machine %s\n", init_uts_ns.name.machine);
2563 kdb_printf("nodename %s\n", init_uts_ns.name.nodename);
2564 kdb_printf("domainname %s\n", init_uts_ns.name.domainname);
2565 kdb_printf("ccversion %s\n", __stringify(CCVERSION));
2566
2567 now = __current_kernel_time();
2568 kdb_gmtime(&now, &tm);
2569 kdb_printf("date %04d-%02d-%02d %02d:%02d:%02d "
2570 "tz_minuteswest %d\n",
2571 1900+tm.tm_year, tm.tm_mon+1, tm.tm_mday,
2572 tm.tm_hour, tm.tm_min, tm.tm_sec,
2573 sys_tz.tz_minuteswest);
2574
2575 kdb_sysinfo(&val);
2576 kdb_printf("uptime ");
2577 if (val.uptime > (24*60*60)) {
2578 int days = val.uptime / (24*60*60);
2579 val.uptime %= (24*60*60);
2580 kdb_printf("%d day%s ", days, days == 1 ? "" : "s");
2581 }
2582 kdb_printf("%02ld:%02ld\n", val.uptime/(60*60), (val.uptime/60)%60);
2583
2584
2585
2586#define LOAD_INT(x) ((x) >> FSHIFT)
2587#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
2588 kdb_printf("load avg %ld.%02ld %ld.%02ld %ld.%02ld\n",
2589 LOAD_INT(val.loads[0]), LOAD_FRAC(val.loads[0]),
2590 LOAD_INT(val.loads[1]), LOAD_FRAC(val.loads[1]),
2591 LOAD_INT(val.loads[2]), LOAD_FRAC(val.loads[2]));
2592#undef LOAD_INT
2593#undef LOAD_FRAC
2594
2595#define K(x) ((x) << (PAGE_SHIFT - 10))
2596 kdb_printf("\nMemTotal: %8lu kB\nMemFree: %8lu kB\n"
2597 "Buffers: %8lu kB\n",
2598 val.totalram, val.freeram, val.bufferram);
2599 return 0;
2600}
2601
2602
2603
2604
2605static int kdb_per_cpu(int argc, const char **argv)
2606{
2607 char fmtstr[64];
2608 int cpu, diag, nextarg = 1;
2609 unsigned long addr, symaddr, val, bytesperword = 0, whichcpu = ~0UL;
2610
2611 if (argc < 1 || argc > 3)
2612 return KDB_ARGCOUNT;
2613
2614 diag = kdbgetaddrarg(argc, argv, &nextarg, &symaddr, NULL, NULL);
2615 if (diag)
2616 return diag;
2617
2618 if (argc >= 2) {
2619 diag = kdbgetularg(argv[2], &bytesperword);
2620 if (diag)
2621 return diag;
2622 }
2623 if (!bytesperword)
2624 bytesperword = KDB_WORD_SIZE;
2625 else if (bytesperword > KDB_WORD_SIZE)
2626 return KDB_BADWIDTH;
2627 sprintf(fmtstr, "%%0%dlx ", (int)(2*bytesperword));
2628 if (argc >= 3) {
2629 diag = kdbgetularg(argv[3], &whichcpu);
2630 if (diag)
2631 return diag;
2632 if (!cpu_online(whichcpu)) {
2633 kdb_printf("cpu %ld is not online\n", whichcpu);
2634 return KDB_BADCPUNUM;
2635 }
2636 }
2637
2638
2639
2640
2641#ifdef __per_cpu_offset
2642#define KDB_PCU(cpu) __per_cpu_offset(cpu)
2643#else
2644#ifdef CONFIG_SMP
2645#define KDB_PCU(cpu) __per_cpu_offset[cpu]
2646#else
2647#define KDB_PCU(cpu) 0
2648#endif
2649#endif
2650 for_each_online_cpu(cpu) {
2651 if (KDB_FLAG(CMD_INTERRUPT))
2652 return 0;
2653
2654 if (whichcpu != ~0UL && whichcpu != cpu)
2655 continue;
2656 addr = symaddr + KDB_PCU(cpu);
2657 diag = kdb_getword(&val, addr, bytesperword);
2658 if (diag) {
2659 kdb_printf("%5d " kdb_bfd_vma_fmt0 " - unable to "
2660 "read, diag=%d\n", cpu, addr, diag);
2661 continue;
2662 }
2663 kdb_printf("%5d ", cpu);
2664 kdb_md_line(fmtstr, addr,
2665 bytesperword == KDB_WORD_SIZE,
2666 1, bytesperword, 1, 1, 0);
2667 }
2668#undef KDB_PCU
2669 return 0;
2670}
2671
2672
2673
2674
2675static int kdb_grep_help(int argc, const char **argv)
2676{
2677 kdb_printf("Usage of cmd args | grep pattern:\n");
2678 kdb_printf(" Any command's output may be filtered through an ");
2679 kdb_printf("emulated 'pipe'.\n");
2680 kdb_printf(" 'grep' is just a key word.\n");
2681 kdb_printf(" The pattern may include a very limited set of "
2682 "metacharacters:\n");
2683 kdb_printf(" pattern or ^pattern or pattern$ or ^pattern$\n");
2684 kdb_printf(" And if there are spaces in the pattern, you may "
2685 "quote it:\n");
2686 kdb_printf(" \"pat tern\" or \"^pat tern\" or \"pat tern$\""
2687 " or \"^pat tern$\"\n");
2688 return 0;
2689}
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703#define kdb_command_extend 50
2704int kdb_register_repeat(char *cmd,
2705 kdb_func_t func,
2706 char *usage,
2707 char *help,
2708 short minlen,
2709 kdb_repeat_t repeat)
2710{
2711 int i;
2712 kdbtab_t *kp;
2713
2714
2715
2716
2717 for_each_kdbcmd(kp, i) {
2718 if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) {
2719 kdb_printf("Duplicate kdb command registered: "
2720 "%s, func %p help %s\n", cmd, func, help);
2721 return 1;
2722 }
2723 }
2724
2725
2726
2727
2728 for_each_kdbcmd(kp, i) {
2729 if (kp->cmd_name == NULL)
2730 break;
2731 }
2732
2733 if (i >= kdb_max_commands) {
2734 kdbtab_t *new = kmalloc((kdb_max_commands - KDB_BASE_CMD_MAX +
2735 kdb_command_extend) * sizeof(*new), GFP_KDB);
2736 if (!new) {
2737 kdb_printf("Could not allocate new kdb_command "
2738 "table\n");
2739 return 1;
2740 }
2741 if (kdb_commands) {
2742 memcpy(new, kdb_commands,
2743 (kdb_max_commands - KDB_BASE_CMD_MAX) * sizeof(*new));
2744 kfree(kdb_commands);
2745 }
2746 memset(new + kdb_max_commands, 0,
2747 kdb_command_extend * sizeof(*new));
2748 kdb_commands = new;
2749 kp = kdb_commands + kdb_max_commands - KDB_BASE_CMD_MAX;
2750 kdb_max_commands += kdb_command_extend;
2751 }
2752
2753 kp->cmd_name = cmd;
2754 kp->cmd_func = func;
2755 kp->cmd_usage = usage;
2756 kp->cmd_help = help;
2757 kp->cmd_flags = 0;
2758 kp->cmd_minlen = minlen;
2759 kp->cmd_repeat = repeat;
2760
2761 return 0;
2762}
2763EXPORT_SYMBOL_GPL(kdb_register_repeat);
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778int kdb_register(char *cmd,
2779 kdb_func_t func,
2780 char *usage,
2781 char *help,
2782 short minlen)
2783{
2784 return kdb_register_repeat(cmd, func, usage, help, minlen,
2785 KDB_REPEAT_NONE);
2786}
2787EXPORT_SYMBOL_GPL(kdb_register);
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798int kdb_unregister(char *cmd)
2799{
2800 int i;
2801 kdbtab_t *kp;
2802
2803
2804
2805
2806 for_each_kdbcmd(kp, i) {
2807 if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) {
2808 kp->cmd_name = NULL;
2809 return 0;
2810 }
2811 }
2812
2813
2814 return 1;
2815}
2816EXPORT_SYMBOL_GPL(kdb_unregister);
2817
2818
2819static void __init kdb_inittab(void)
2820{
2821 int i;
2822 kdbtab_t *kp;
2823
2824 for_each_kdbcmd(kp, i)
2825 kp->cmd_name = NULL;
2826
2827 kdb_register_repeat("md", kdb_md, "<vaddr>",
2828 "Display Memory Contents, also mdWcN, e.g. md8c1", 1,
2829 KDB_REPEAT_NO_ARGS);
2830 kdb_register_repeat("mdr", kdb_md, "<vaddr> <bytes>",
2831 "Display Raw Memory", 0, KDB_REPEAT_NO_ARGS);
2832 kdb_register_repeat("mdp", kdb_md, "<paddr> <bytes>",
2833 "Display Physical Memory", 0, KDB_REPEAT_NO_ARGS);
2834 kdb_register_repeat("mds", kdb_md, "<vaddr>",
2835 "Display Memory Symbolically", 0, KDB_REPEAT_NO_ARGS);
2836 kdb_register_repeat("mm", kdb_mm, "<vaddr> <contents>",
2837 "Modify Memory Contents", 0, KDB_REPEAT_NO_ARGS);
2838 kdb_register_repeat("go", kdb_go, "[<vaddr>]",
2839 "Continue Execution", 1, KDB_REPEAT_NONE);
2840 kdb_register_repeat("rd", kdb_rd, "",
2841 "Display Registers", 0, KDB_REPEAT_NONE);
2842 kdb_register_repeat("rm", kdb_rm, "<reg> <contents>",
2843 "Modify Registers", 0, KDB_REPEAT_NONE);
2844 kdb_register_repeat("ef", kdb_ef, "<vaddr>",
2845 "Display exception frame", 0, KDB_REPEAT_NONE);
2846 kdb_register_repeat("bt", kdb_bt, "[<vaddr>]",
2847 "Stack traceback", 1, KDB_REPEAT_NONE);
2848 kdb_register_repeat("btp", kdb_bt, "<pid>",
2849 "Display stack for process <pid>", 0, KDB_REPEAT_NONE);
2850 kdb_register_repeat("bta", kdb_bt, "[DRSTCZEUIMA]",
2851 "Display stack all processes", 0, KDB_REPEAT_NONE);
2852 kdb_register_repeat("btc", kdb_bt, "",
2853 "Backtrace current process on each cpu", 0, KDB_REPEAT_NONE);
2854 kdb_register_repeat("btt", kdb_bt, "<vaddr>",
2855 "Backtrace process given its struct task address", 0,
2856 KDB_REPEAT_NONE);
2857 kdb_register_repeat("ll", kdb_ll, "<first-element> <linkoffset> <cmd>",
2858 "Execute cmd for each element in linked list", 0, KDB_REPEAT_NONE);
2859 kdb_register_repeat("env", kdb_env, "",
2860 "Show environment variables", 0, KDB_REPEAT_NONE);
2861 kdb_register_repeat("set", kdb_set, "",
2862 "Set environment variables", 0, KDB_REPEAT_NONE);
2863 kdb_register_repeat("help", kdb_help, "",
2864 "Display Help Message", 1, KDB_REPEAT_NONE);
2865 kdb_register_repeat("?", kdb_help, "",
2866 "Display Help Message", 0, KDB_REPEAT_NONE);
2867 kdb_register_repeat("cpu", kdb_cpu, "<cpunum>",
2868 "Switch to new cpu", 0, KDB_REPEAT_NONE);
2869 kdb_register_repeat("kgdb", kdb_kgdb, "",
2870 "Enter kgdb mode", 0, KDB_REPEAT_NONE);
2871 kdb_register_repeat("ps", kdb_ps, "[<flags>|A]",
2872 "Display active task list", 0, KDB_REPEAT_NONE);
2873 kdb_register_repeat("pid", kdb_pid, "<pidnum>",
2874 "Switch to another task", 0, KDB_REPEAT_NONE);
2875 kdb_register_repeat("reboot", kdb_reboot, "",
2876 "Reboot the machine immediately", 0, KDB_REPEAT_NONE);
2877#if defined(CONFIG_MODULES)
2878 kdb_register_repeat("lsmod", kdb_lsmod, "",
2879 "List loaded kernel modules", 0, KDB_REPEAT_NONE);
2880#endif
2881#if defined(CONFIG_MAGIC_SYSRQ)
2882 kdb_register_repeat("sr", kdb_sr, "<key>",
2883 "Magic SysRq key", 0, KDB_REPEAT_NONE);
2884#endif
2885#if defined(CONFIG_PRINTK)
2886 kdb_register_repeat("dmesg", kdb_dmesg, "[lines]",
2887 "Display syslog buffer", 0, KDB_REPEAT_NONE);
2888#endif
2889 kdb_register_repeat("defcmd", kdb_defcmd, "name \"usage\" \"help\"",
2890 "Define a set of commands, down to endefcmd", 0, KDB_REPEAT_NONE);
2891 kdb_register_repeat("kill", kdb_kill, "<-signal> <pid>",
2892 "Send a signal to a process", 0, KDB_REPEAT_NONE);
2893 kdb_register_repeat("summary", kdb_summary, "",
2894 "Summarize the system", 4, KDB_REPEAT_NONE);
2895 kdb_register_repeat("per_cpu", kdb_per_cpu, "",
2896 "Display per_cpu variables", 3, KDB_REPEAT_NONE);
2897 kdb_register_repeat("grephelp", kdb_grep_help, "",
2898 "Display help on | grep", 0, KDB_REPEAT_NONE);
2899}
2900
2901
2902static void __init kdb_cmd_init(void)
2903{
2904 int i, diag;
2905 for (i = 0; kdb_cmds[i]; ++i) {
2906 diag = kdb_parse(kdb_cmds[i]);
2907 if (diag)
2908 kdb_printf("kdb command %s failed, kdb diag %d\n",
2909 kdb_cmds[i], diag);
2910 }
2911 if (defcmd_in_progress) {
2912 kdb_printf("Incomplete 'defcmd' set, forcing endefcmd\n");
2913 kdb_parse("endefcmd");
2914 }
2915}
2916
2917
2918void __init kdb_init(int lvl)
2919{
2920 static int kdb_init_lvl = KDB_NOT_INITIALIZED;
2921 int i;
2922
2923 if (kdb_init_lvl == KDB_INIT_FULL || lvl <= kdb_init_lvl)
2924 return;
2925 for (i = kdb_init_lvl; i < lvl; i++) {
2926 switch (i) {
2927 case KDB_NOT_INITIALIZED:
2928 kdb_inittab();
2929 kdb_initbptab();
2930 break;
2931 case KDB_INIT_EARLY:
2932 kdb_cmd_init();
2933 break;
2934 }
2935 }
2936 kdb_init_lvl = lvl;
2937}
2938