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1.45 ! tedu 1: /* $OpenBSD: kdump.c,v 1.44 2010/06/30 20:43:36 tedu Exp $ */
1.4 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1988, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.21 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <sys/param.h>
33: #include <sys/time.h>
34: #include <sys/uio.h>
35: #include <sys/ktrace.h>
36: #include <sys/ioctl.h>
37: #include <sys/ptrace.h>
1.28 deraadt 38: #include <sys/sysctl.h>
1.1 deraadt 39: #define _KERNEL
40: #include <sys/errno.h>
41: #undef _KERNEL
42:
1.33 tedu 43: #include <ctype.h>
1.1 deraadt 44: #include <err.h>
45: #include <signal.h>
46: #include <stdio.h>
47: #include <stdlib.h>
48: #include <string.h>
49: #include <unistd.h>
50: #include <vis.h>
51:
52: #include "ktrace.h"
1.22 deraadt 53: #include "kdump.h"
1.12 espie 54: #include "extern.h"
1.1 deraadt 55:
1.31 tedu 56: int timestamp, decimal, iohex, fancy = 1, tail, maxdata;
1.1 deraadt 57: char *tracefile = DEF_TRACEFILE;
58: struct ktr_header ktr_header;
1.17 deraadt 59: pid_t pid = -1;
1.1 deraadt 60:
61: #define eqs(s1, s2) (strcmp((s1), (s2)) == 0)
62:
63: #include <sys/syscall.h>
64:
1.25 mickey 65: #include <compat/bsdos/bsdos_syscall.h>
66: #include <compat/freebsd/freebsd_syscall.h>
67: #include <compat/linux/linux_syscall.h>
68: #include <compat/sunos/sunos_syscall.h>
69: #include <compat/svr4/svr4_syscall.h>
1.1 deraadt 70:
71: #define KTRACE
1.19 mickey 72: #define PTRACE
1.7 deraadt 73: #define NFSCLIENT
74: #define NFSSERVER
75: #define SYSVSEM
76: #define SYSVMSG
77: #define SYSVSHM
78: #define LFS
1.30 miod 79: #define RTHREADS
1.25 mickey 80: #include <kern/syscalls.c>
1.1 deraadt 81:
1.25 mickey 82: #include <compat/bsdos/bsdos_syscalls.c>
83: #include <compat/freebsd/freebsd_syscalls.c>
84: #include <compat/linux/linux_syscalls.c>
85: #include <compat/sunos/sunos_syscalls.c>
86: #include <compat/svr4/svr4_syscalls.c>
1.1 deraadt 87: #undef KTRACE
1.19 mickey 88: #undef PTRACE
1.7 deraadt 89: #undef NFSCLIENT
90: #undef NFSSERVER
91: #undef SYSVSEM
92: #undef SYSVMSG
93: #undef SYSVSHM
94: #undef LFS
1.30 miod 95: #undef RTHREADS
1.1 deraadt 96:
97: struct emulation {
98: char *name; /* Emulation name */
99: char **sysnames; /* Array of system call names */
100: int nsysnames; /* Number of */
101: };
102:
103: static struct emulation emulations[] = {
1.9 deraadt 104: { "native", syscallnames, SYS_MAXSYSCALL },
105: { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL },
106: { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL },
107: { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL },
108: { "bsdos", bsdos_syscallnames, BSDOS_SYS_MAXSYSCALL },
109: { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL },
110: { NULL, NULL, NULL }
1.1 deraadt 111: };
112:
113: struct emulation *current;
114:
115:
116: static char *ptrace_ops[] = {
117: "PT_TRACE_ME", "PT_READ_I", "PT_READ_D", "PT_READ_U",
118: "PT_WRITE_I", "PT_WRITE_D", "PT_WRITE_U", "PT_CONTINUE",
1.15 art 119: "PT_KILL", "PT_ATTACH", "PT_DETACH", "PT_IO",
1.1 deraadt 120: };
121:
1.37 tedu 122: static int fread_tail(void *, size_t, size_t);
1.13 millert 123: static void dumpheader(struct ktr_header *);
124: static void ktrcsw(struct ktr_csw *);
1.37 tedu 125: static void ktremul(char *, size_t);
126: static void ktrgenio(struct ktr_genio *, size_t);
127: static void ktrnamei(const char *, size_t);
1.13 millert 128: static void ktrpsig(struct ktr_psig *);
129: static void ktrsyscall(struct ktr_syscall *);
130: static void ktrsysret(struct ktr_sysret *);
131: static void setemul(const char *);
132: static void usage(void);
1.12 espie 133:
1.1 deraadt 134: int
1.17 deraadt 135: main(int argc, char *argv[])
1.1 deraadt 136: {
1.37 tedu 137: int ch, silent;
138: size_t ktrlen, size;
1.17 deraadt 139: int trpoints = ALL_POINTS;
1.12 espie 140: void *m;
1.1 deraadt 141:
1.3 deraadt 142: current = &emulations[0]; /* native */
1.1 deraadt 143:
1.31 tedu 144: while ((ch = getopt(argc, argv, "e:f:dlm:nRp:Tt:xX")) != -1)
1.1 deraadt 145: switch (ch) {
146: case 'e':
147: setemul(optarg);
148: break;
149: case 'f':
150: tracefile = optarg;
151: break;
152: case 'd':
153: decimal = 1;
154: break;
155: case 'l':
156: tail = 1;
157: break;
158: case 'm':
159: maxdata = atoi(optarg);
160: break;
161: case 'n':
162: fancy = 0;
163: break;
1.17 deraadt 164: case 'p':
165: pid = atoi(optarg);
166: break;
1.1 deraadt 167: case 'R':
168: timestamp = 2; /* relative timestamp */
169: break;
170: case 'T':
171: timestamp = 1;
172: break;
173: case 't':
174: trpoints = getpoints(optarg);
175: if (trpoints < 0)
176: errx(1, "unknown trace point in %s", optarg);
177: break;
1.31 tedu 178: case 'x':
179: iohex = 1;
180: break;
181: case 'X':
182: iohex = 2;
183: break;
1.1 deraadt 184: default:
185: usage();
186: }
1.5 deraadt 187: if (argc > optind)
1.1 deraadt 188: usage();
189:
1.37 tedu 190: m = malloc(size = 1025);
1.1 deraadt 191: if (m == NULL)
1.37 tedu 192: err(1, NULL);
1.1 deraadt 193: if (!freopen(tracefile, "r", stdin))
194: err(1, "%s", tracefile);
195: while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
1.17 deraadt 196: silent = 0;
197: if (pid != -1 && pid != ktr_header.ktr_pid)
198: silent = 1;
199: if (silent == 0 && trpoints & (1<<ktr_header.ktr_type))
1.1 deraadt 200: dumpheader(&ktr_header);
1.37 tedu 201: ktrlen = ktr_header.ktr_len;
1.1 deraadt 202: if (ktrlen > size) {
1.23 tedu 203: void *newm;
204:
205: newm = realloc(m, ktrlen+1);
206: if (newm == NULL)
1.37 tedu 207: err(1, NULL);
1.23 tedu 208: m = newm;
1.1 deraadt 209: size = ktrlen;
210: }
211: if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
212: errx(1, "data too short");
1.17 deraadt 213: if (silent)
214: continue;
1.1 deraadt 215: if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
216: continue;
217: switch (ktr_header.ktr_type) {
218: case KTR_SYSCALL:
219: ktrsyscall((struct ktr_syscall *)m);
220: break;
221: case KTR_SYSRET:
222: ktrsysret((struct ktr_sysret *)m);
223: break;
224: case KTR_NAMEI:
225: ktrnamei(m, ktrlen);
226: break;
227: case KTR_GENIO:
228: ktrgenio((struct ktr_genio *)m, ktrlen);
229: break;
230: case KTR_PSIG:
231: ktrpsig((struct ktr_psig *)m);
232: break;
233: case KTR_CSW:
234: ktrcsw((struct ktr_csw *)m);
235: break;
236: case KTR_EMUL:
237: ktremul(m, ktrlen);
238: break;
239: }
240: if (tail)
241: (void)fflush(stdout);
242: }
1.12 espie 243: exit(0);
1.1 deraadt 244: }
245:
1.12 espie 246: static int
1.37 tedu 247: fread_tail(void *buf, size_t size, size_t num)
1.1 deraadt 248: {
249: int i;
250:
251: while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
252: (void)sleep(1);
253: clearerr(stdin);
254: }
255: return (i);
256: }
257:
1.12 espie 258: static void
1.17 deraadt 259: dumpheader(struct ktr_header *kth)
1.1 deraadt 260: {
1.17 deraadt 261: static struct timeval prevtime;
1.1 deraadt 262: char unknown[64], *type;
263: struct timeval temp;
264:
265: switch (kth->ktr_type) {
266: case KTR_SYSCALL:
267: type = "CALL";
268: break;
269: case KTR_SYSRET:
270: type = "RET ";
271: break;
272: case KTR_NAMEI:
273: type = "NAMI";
274: break;
275: case KTR_GENIO:
276: type = "GIO ";
277: break;
278: case KTR_PSIG:
279: type = "PSIG";
280: break;
281: case KTR_CSW:
282: type = "CSW";
283: break;
284: case KTR_EMUL:
285: type = "EMUL";
286: break;
287: default:
1.17 deraadt 288: (void)snprintf(unknown, sizeof unknown, "UNKNOWN(%d)",
289: kth->ktr_type);
1.1 deraadt 290: type = unknown;
291: }
292:
1.16 mpech 293: (void)printf("%6ld %-8.*s ", (long)kth->ktr_pid, MAXCOMLEN,
294: kth->ktr_comm);
1.1 deraadt 295: if (timestamp) {
296: if (timestamp == 2) {
297: timersub(&kth->ktr_time, &prevtime, &temp);
298: prevtime = kth->ktr_time;
299: } else
300: temp = kth->ktr_time;
301: (void)printf("%ld.%06ld ", temp.tv_sec, temp.tv_usec);
302: }
303: (void)printf("%s ", type);
304: }
305:
1.12 espie 306: static void
1.17 deraadt 307: ioctldecode(u_long cmd)
1.2 deraadt 308: {
309: char dirbuf[4], *dir = dirbuf;
310:
1.6 deraadt 311: if (cmd & IOC_IN)
312: *dir++ = 'W';
1.2 deraadt 313: if (cmd & IOC_OUT)
314: *dir++ = 'R';
315: *dir = '\0';
316:
1.33 tedu 317: printf(decimal ? ",_IO%s('%c',%lu" : ",_IO%s('%c',%#lx",
318: dirbuf, (int)((cmd >> 8) & 0xff), cmd & 0xff);
1.2 deraadt 319: if ((cmd & IOC_VOID) == 0)
1.34 tedu 320: printf(decimal ? ",%lu)" : ",%#lx)", (cmd >> 16) & 0xff);
1.2 deraadt 321: else
322: printf(")");
323: }
1.1 deraadt 324:
1.12 espie 325: static void
1.17 deraadt 326: ktrsyscall(struct ktr_syscall *ktr)
1.1 deraadt 327: {
1.12 espie 328: int argsize = ktr->ktr_argsize;
329: register_t *ap;
1.1 deraadt 330:
331: if (ktr->ktr_code >= current->nsysnames || ktr->ktr_code < 0)
332: (void)printf("[%d]", ktr->ktr_code);
333: else
334: (void)printf("%s", current->sysnames[ktr->ktr_code]);
335: ap = (register_t *)((char *)ktr + sizeof(struct ktr_syscall));
1.27 mickey 336: (void)putchar('(');
1.1 deraadt 337: if (argsize) {
1.27 mickey 338: char c = '\0';
1.1 deraadt 339: if (fancy) {
340: if (ktr->ktr_code == SYS_ioctl) {
1.12 espie 341: const char *cp;
1.17 deraadt 342:
1.1 deraadt 343: if (decimal)
1.27 mickey 344: (void)printf("%ld", (long)*ap);
1.1 deraadt 345: else
1.27 mickey 346: (void)printf("%#lx", (long)*ap);
1.1 deraadt 347: ap++;
348: argsize -= sizeof(register_t);
349: if ((cp = ioctlname(*ap)) != NULL)
350: (void)printf(",%s", cp);
1.2 deraadt 351: else
352: ioctldecode(*ap);
1.1 deraadt 353: c = ',';
354: ap++;
355: argsize -= sizeof(register_t);
1.27 mickey 356: } else if (ktr->ktr_code == SYS___sysctl) {
357: int *np, n;
358:
359: n = ap[1];
1.28 deraadt 360: if (n > CTL_MAXNAME)
361: n = CTL_MAXNAME;
1.27 mickey 362: np = (int *)(ap + 6);
363: for (; n--; np++) {
364: if (c)
365: putchar(c);
366: printf("%d", *np);
367: c = '.';
368: }
369:
370: c = ',';
371: ap += 2;
372: argsize -= 2 * sizeof(register_t);
1.1 deraadt 373: } else if (ktr->ktr_code == SYS_ptrace) {
1.24 miod 374: if (*ap >= 0 && *ap <
1.1 deraadt 375: sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
1.27 mickey 376: (void)printf("%s", ptrace_ops[*ap]);
1.24 miod 377: else switch(*ap) {
378: #ifdef PT_GETFPREGS
379: case PT_GETFPREGS:
1.27 mickey 380: (void)printf("PT_GETFPREGS");
1.24 miod 381: break;
382: #endif
383: case PT_GETREGS:
1.27 mickey 384: (void)printf("PT_GETREGS");
1.24 miod 385: break;
386: #ifdef PT_SETFPREGS
387: case PT_SETFPREGS:
1.27 mickey 388: (void)printf("PT_SETFPREGS");
1.24 miod 389: break;
390: #endif
391: case PT_SETREGS:
1.27 mickey 392: (void)printf("PT_SETREGS");
1.24 miod 393: break;
394: #ifdef PT_STEP
395: case PT_STEP:
1.27 mickey 396: (void)printf("PT_STEP");
1.24 miod 397: break;
398: #endif
399: #ifdef PT_WCOOKIE
400: case PT_WCOOKIE:
1.27 mickey 401: (void)printf("PT_WCOOKIE");
1.24 miod 402: break;
403: #endif
404: default:
1.27 mickey 405: (void)printf("%ld", (long)*ap);
1.24 miod 406: break;
407: }
1.1 deraadt 408: c = ',';
409: ap++;
410: argsize -= sizeof(register_t);
411: }
412: }
413: while (argsize) {
1.27 mickey 414: if (c)
415: putchar(c);
1.1 deraadt 416: if (decimal)
1.27 mickey 417: (void)printf("%ld", (long)*ap);
1.1 deraadt 418: else
1.27 mickey 419: (void)printf("%#lx", (long)*ap);
1.1 deraadt 420: c = ',';
421: ap++;
422: argsize -= sizeof(register_t);
423: }
424: }
1.27 mickey 425: (void)printf(")\n");
1.1 deraadt 426: }
427:
1.12 espie 428: static void
1.17 deraadt 429: ktrsysret(struct ktr_sysret *ktr)
1.1 deraadt 430: {
1.12 espie 431: int ret = ktr->ktr_retval;
432: int error = ktr->ktr_error;
433: int code = ktr->ktr_code;
1.1 deraadt 434:
435: if (code >= current->nsysnames || code < 0)
436: (void)printf("[%d] ", code);
437: else
438: (void)printf("%s ", current->sysnames[code]);
439:
440: if (error == 0) {
441: if (fancy) {
442: (void)printf("%d", ret);
443: if (ret < 0 || ret > 9)
444: (void)printf("/%#x", ret);
445: } else {
446: if (decimal)
447: (void)printf("%d", ret);
448: else
449: (void)printf("%#x", ret);
450: }
451: } else if (error == ERESTART)
452: (void)printf("RESTART");
453: else if (error == EJUSTRETURN)
454: (void)printf("JUSTRETURN");
455: else {
456: (void)printf("-1 errno %d", ktr->ktr_error);
457: if (fancy)
458: (void)printf(" %s", strerror(ktr->ktr_error));
459: }
460: (void)putchar('\n');
461: }
462:
1.12 espie 463: static void
1.37 tedu 464: ktrnamei(const char *cp, size_t len)
1.1 deraadt 465: {
1.37 tedu 466: (void)printf("\"%.*s\"\n", (int)len, cp);
1.1 deraadt 467: }
468:
1.12 espie 469: static void
1.37 tedu 470: ktremul(char *cp, size_t len)
1.1 deraadt 471: {
472: char name[1024];
473:
474: if (len >= sizeof(name))
475: errx(1, "Emulation name too long");
476:
477: strncpy(name, cp, len);
478: name[len] = '\0';
479: (void)printf("\"%s\"\n", name);
480:
481: setemul(name);
482: }
483:
1.12 espie 484: static void
1.37 tedu 485: ktrgenio(struct ktr_genio *ktr, size_t len)
1.1 deraadt 486: {
1.37 tedu 487: unsigned char *dp = (unsigned char *)ktr + sizeof(struct ktr_genio);
488: int i, j;
489: size_t datalen = len - sizeof(struct ktr_genio);
1.12 espie 490: static int screenwidth = 0;
1.31 tedu 491: int col = 0, width, bpl;
1.32 tedu 492: unsigned char visbuf[5], *cp, c;
1.1 deraadt 493:
494: if (screenwidth == 0) {
495: struct winsize ws;
496:
497: if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
498: ws.ws_col > 8)
499: screenwidth = ws.ws_col;
500: else
501: screenwidth = 80;
502: }
1.37 tedu 503: printf("fd %d %s %zu bytes\n", ktr->ktr_fd,
1.1 deraadt 504: ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen);
505: if (maxdata && datalen > maxdata)
506: datalen = maxdata;
1.31 tedu 507: if (iohex && !datalen)
508: return;
509: if (iohex == 1) {
510: putchar('\t');
511: col = 8;
512: for (i = 0; i < datalen; i++) {
1.35 tedu 513: printf("%02x", dp[i]);
1.31 tedu 514: col += 3;
515: if (i < datalen - 1) {
516: if (col + 3 > screenwidth) {
517: printf("\n\t");
518: col = 8;
519: } else
520: putchar(' ');
521: }
522: }
523: putchar('\n');
524: return;
525: }
526: if (iohex == 2) {
527: bpl = (screenwidth - 13)/4;
528: if (bpl <= 0)
529: bpl = 1;
530: for (i = 0; i < datalen; i += bpl) {
531: printf(" %04x: ", i);
532: for (j = 0; j < bpl; j++) {
533: if (i+j >= datalen)
534: printf(" ");
535: else
1.35 tedu 536: printf("%02x ", dp[i+j]);
1.31 tedu 537: }
538: putchar(' ');
539: for (j = 0; j < bpl; j++) {
540: if (i+j >= datalen)
541: break;
542: c = dp[i+j];
543: if (!isprint(c))
544: c = '.';
545: putchar(c);
546: }
547: putchar('\n');
548: }
549: return;
550: }
1.1 deraadt 551: (void)printf(" \"");
552: col = 8;
553: for (; datalen > 0; datalen--, dp++) {
1.31 tedu 554: (void)vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
1.1 deraadt 555: cp = visbuf;
1.17 deraadt 556:
1.1 deraadt 557: /*
558: * Keep track of printables and
559: * space chars (like fold(1)).
560: */
561: if (col == 0) {
562: (void)putchar('\t');
563: col = 8;
564: }
1.17 deraadt 565: switch (*cp) {
1.1 deraadt 566: case '\n':
567: col = 0;
568: (void)putchar('\n');
569: continue;
570: case '\t':
571: width = 8 - (col&07);
572: break;
573: default:
574: width = strlen(cp);
575: }
576: if (col + width > (screenwidth-2)) {
577: (void)printf("\\\n\t");
578: col = 8;
579: }
580: col += width;
581: do {
582: (void)putchar(*cp++);
583: } while (*cp);
584: }
585: if (col == 0)
586: (void)printf(" ");
587: (void)printf("\"\n");
588: }
589:
1.12 espie 590: static void
1.17 deraadt 591: ktrpsig(struct ktr_psig *psig)
1.1 deraadt 592: {
593: (void)printf("SIG%s ", sys_signame[psig->signo]);
594: if (psig->action == SIG_DFL)
1.14 deraadt 595: (void)printf("SIG_DFL code %d", psig->code);
1.1 deraadt 596: else
1.14 deraadt 597: (void)printf("caught handler=0x%lx mask=0x%x",
598: (u_long)psig->action, psig->mask);
599: switch (psig->signo) {
600: case SIGSEGV:
601: case SIGILL:
602: case SIGBUS:
603: case SIGFPE:
604: printf(" addr=%p trapno=%d", psig->si.si_addr,
605: psig->si.si_trapno);
606: break;
607: default:
608: break;
609: }
610: printf("\n");
1.1 deraadt 611: }
612:
1.12 espie 613: static void
1.17 deraadt 614: ktrcsw(struct ktr_csw *cs)
1.1 deraadt 615: {
616: (void)printf("%s %s\n", cs->out ? "stop" : "resume",
617: cs->user ? "user" : "kernel");
618: }
619:
1.12 espie 620: static void
1.17 deraadt 621: usage(void)
1.1 deraadt 622: {
623:
1.19 mickey 624: extern char *__progname;
625: fprintf(stderr, "usage: %s "
1.40 sobrado 626: "[-dlnRTXx] [-e emulation] [-f file] [-m maxdata] [-p pid]\n"
627: "%*s[-t [ceinsw]]\n",
628: __progname, sizeof("usage: ") + strlen(__progname), "");
1.1 deraadt 629: exit(1);
630: }
631:
1.12 espie 632: static void
1.17 deraadt 633: setemul(const char *name)
1.1 deraadt 634: {
635: int i;
1.17 deraadt 636:
1.1 deraadt 637: for (i = 0; emulations[i].name != NULL; i++)
638: if (strcmp(emulations[i].name, name) == 0) {
639: current = &emulations[i];
640: return;
641: }
642: warnx("Emulation `%s' unknown", name);
643: }