NetBSD/usr.bin/kdump/kdump.c

643 lines
14 KiB
C

/* $NetBSD: kdump.c,v 1.40 2002/08/04 14:26:21 jdolecek Exp $ */
/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)kdump.c 8.4 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: kdump.c,v 1.40 2002/08/04 14:26:21 jdolecek Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#define _KERNEL
#include <sys/errno.h>
#undef _KERNEL
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/ktrace.h>
#include <sys/ioctl.h>
#include <sys/ptrace.h>
#include <err.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
#include "ktrace.h"
#include "setemul.h"
#include <sys/syscall.h>
int timestamp, decimal, plain, tail, maxdata;
pid_t do_pid = -1;
const char *tracefile = DEF_TRACEFILE;
struct ktr_header ktr_header;
int emul_changed = 0;
#define eqs(s1, s2) (strcmp((s1), (s2)) == 0)
static const char *ptrace_ops[] = {
"PT_TRACE_ME", "PT_READ_I", "PT_READ_D", "PT_READ_U",
"PT_WRITE_I", "PT_WRITE_D", "PT_WRITE_U", "PT_CONTINUE",
"PT_KILL", "PT_ATTACH", "PT_DETACH",
};
static const char *linux_ptrace_ops[] = {
"PTRACE_TRACEME",
"PTRACE_PEEKTEXT", "PTRACE_PEEKDATA", "PTRACE_PEEKUSER",
"PTRACE_POKETEXT", "PTRACE_POKEDATA", "PTRACE_POKEUSER",
"PTRACE_CONT", "PTRACE_KILL", "PTRACE_SINGLESTEP",
NULL, NULL,
"PTRACE_GETREGS", "PTRACE_SETREGS", "PTRACE_GETFPREGS",
"PTRACE_SETFPREGS", "PTRACE_ATTACH", "PTRACE_DETACH",
"PTRACE_SYSCALL",
};
int main __P((int, char **));
int fread_tail __P((char *, int, int));
void dumpheader __P((struct ktr_header *));
void ioctldecode __P((u_long));
void ktrsyscall __P((struct ktr_syscall *));
void ktrsysret __P((struct ktr_sysret *));
void ktrnamei __P((char *, int));
void ktremul __P((char *, int, int));
void ktrgenio __P((struct ktr_genio *, int));
void ktrpsig __P((struct ktr_psig *));
void ktrcsw __P((struct ktr_csw *));
void ktruser __P((struct ktr_user *, int));
void usage __P((void));
void eprint __P((int));
char *ioctlname __P((long));
static const char *signame __P((long, int));
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, ktrlen, size;
void *m;
int trpoints = ALL_POINTS;
const char *emul_name = "netbsd";
while ((ch = getopt(argc, argv, "e:f:dlm:np:RTt:")) != -1)
switch (ch) {
case 'e':
emul_name = strdup(optarg); /* it's safer to copy it */
break;
case 'f':
tracefile = optarg;
break;
case 'd':
decimal = 1;
break;
case 'l':
tail = 1;
break;
case 'p':
do_pid = atoi(optarg);
break;
case 'm':
maxdata = atoi(optarg);
break;
case 'n':
plain++;
break;
case 'R':
timestamp = 2; /* relative timestamp */
break;
case 'T':
timestamp = 1;
break;
case 't':
trpoints = getpoints(optarg);
if (trpoints < 0)
errx(1, "unknown trace point in %s", optarg);
break;
default:
usage();
}
argv += optind;
argc -= optind;
if (argc > 1)
usage();
setemul(emul_name, 0, 0);
m = malloc(size = 1024);
if (m == NULL)
errx(1, "malloc: %s", strerror(ENOMEM));
if (!freopen(tracefile, "r", stdin))
err(1, "%s", tracefile);
while (fread_tail((char *)&ktr_header, sizeof(struct ktr_header), 1)) {
if (trpoints & (1<<ktr_header.ktr_type))
if (do_pid == -1 || ktr_header.ktr_pid == do_pid)
dumpheader(&ktr_header);
if ((ktrlen = ktr_header.ktr_len) < 0)
errx(1, "bogus length 0x%x", ktrlen);
if (ktrlen > size) {
while(ktrlen > size) size *= 2;
m = (void *)realloc(m, size);
if (m == NULL)
errx(1, "realloc: %s", strerror(ENOMEM));
}
if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
errx(1, "data too short");
if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
continue;
/* update context to match currently processed record */
if (do_pid != -1 && ktr_header.ktr_pid != do_pid)
continue;
ectx_sanify(ktr_header.ktr_pid);
switch (ktr_header.ktr_type) {
case KTR_SYSCALL:
ktrsyscall((struct ktr_syscall *)m);
break;
case KTR_SYSRET:
ktrsysret((struct ktr_sysret *)m);
break;
case KTR_NAMEI:
ktrnamei(m, ktrlen);
break;
case KTR_GENIO:
ktrgenio((struct ktr_genio *)m, ktrlen);
break;
case KTR_PSIG:
ktrpsig((struct ktr_psig *)m);
break;
case KTR_CSW:
ktrcsw((struct ktr_csw *)m);
break;
case KTR_EMUL:
ktremul(m, ktrlen, size);
break;
case KTR_USER:
ktruser((struct ktr_user *)m, ktrlen);
break;
}
if (tail)
(void)fflush(stdout);
}
return (0);
}
int
fread_tail(buf, size, num)
char *buf;
int num, size;
{
int i;
while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
(void)sleep(1);
clearerr(stdin);
}
return (i);
}
void
dumpheader(kth)
struct ktr_header *kth;
{
char unknown[64], *type;
static struct timeval prevtime;
struct timeval temp;
switch (kth->ktr_type) {
case KTR_SYSCALL:
type = "CALL";
break;
case KTR_SYSRET:
type = "RET ";
break;
case KTR_NAMEI:
type = "NAMI";
break;
case KTR_GENIO:
type = "GIO ";
break;
case KTR_PSIG:
type = "PSIG";
break;
case KTR_CSW:
type = "CSW";
break;
case KTR_EMUL:
type = "EMUL";
break;
case KTR_USER:
type = "USER";
break;
default:
(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
type = unknown;
}
(void)printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN, kth->ktr_comm);
if (timestamp) {
if (timestamp == 2) {
timersub(&kth->ktr_time, &prevtime, &temp);
prevtime = kth->ktr_time;
} else
temp = kth->ktr_time;
(void)printf("%ld.%06ld ",
(long int)temp.tv_sec, (long int)temp.tv_usec);
}
(void)printf("%s ", type);
}
void
ioctldecode(cmd)
u_long cmd;
{
char dirbuf[4], *dir = dirbuf;
if (cmd & IOC_IN)
*dir++ = 'W';
if (cmd & IOC_OUT)
*dir++ = 'R';
*dir = '\0';
printf(decimal ? ",_IO%s('%c',%ld" : ",_IO%s('%c',%#lx",
dirbuf, (int) ((cmd >> 8) & 0xff), cmd & 0xff);
if ((cmd & IOC_VOID) == 0)
printf(decimal ? ",%ld)" : ",%#lx)", (cmd >> 16) & 0xff);
else
printf(")");
}
void
ktrsyscall(ktr)
struct ktr_syscall *ktr;
{
int argsize = ktr->ktr_argsize;
register_t *ap;
if (ktr->ktr_code >= current->nsysnames || ktr->ktr_code < 0)
(void)printf("[%d]", ktr->ktr_code);
else
(void)printf("%s", current->sysnames[ktr->ktr_code]);
ap = (register_t *)((char *)ktr + sizeof(struct ktr_syscall));
if (argsize) {
char c = '(';
if (!plain) {
char *cp;
switch (ktr->ktr_code) {
case SYS_ioctl:
if (decimal)
(void)printf("(%ld", (long)*ap);
else
(void)printf("(%#lx", (long)*ap);
ap++;
argsize -= sizeof(register_t);
if ((cp = ioctlname(*ap)) != NULL)
(void)printf(",%s", cp);
else
ioctldecode(*ap);
c = ',';
ap++;
argsize -= sizeof(register_t);
break;
case SYS_ptrace:
if (strcmp(current->name, "linux") == 0) {
if (*ap >= 0 && *ap <=
sizeof(linux_ptrace_ops) /
sizeof(linux_ptrace_ops[0]))
(void)printf("(%s",
linux_ptrace_ops[*ap]);
else
(void)printf("(%ld", (long)*ap);
} else {
if (*ap >= 0 && *ap <=
sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
(void)printf("(%s", ptrace_ops[*ap]);
else
(void)printf("(%ld", (long)*ap);
}
c = ',';
ap++;
argsize -= sizeof(register_t);
break;
case SYS_kill:
if (decimal)
(void)printf("(%ld, SIG%s",
(long)ap[0], signame(ap[1], 1));
else
(void)printf("(%#lx, SIG%s",
(long)ap[0], signame(ap[1], 1));
ap += 2;
argsize -= 2 * sizeof(register_t);
break;
default:
/* No special handling */
break;
}
}
while (argsize) {
if (decimal)
(void)printf("%c%ld", c, (long)*ap);
else
(void)printf("%c%#lx", c, (long)*ap);
c = ',';
ap++;
argsize -= sizeof(register_t);
}
(void)putchar(')');
}
(void)putchar('\n');
}
void
ktrsysret(ktr)
struct ktr_sysret *ktr;
{
const struct emulation *revelant;
register_t ret = ktr->ktr_retval;
int error = ktr->ktr_error;
int code = ktr->ktr_code;
if (emul_changed)
revelant = previous;
else
revelant = current;
emul_changed = 0;
if (code >= revelant->nsysnames || code < 0 || plain > 1)
(void)printf("[%d] ", code);
else
(void)printf("%s ", revelant->sysnames[code]);
switch (error) {
case 0:
if (!plain) {
(void)printf("%ld", (long)ret);
if (ret < 0 || ret > 9)
(void)printf("/%#lx", (long)ret);
} else {
if (decimal)
(void)printf("%ld", (long)ret);
else
(void)printf("%#lx", (long)ret);
}
break;
default:
eprint(error);
break;
}
(void)putchar('\n');
}
/*
* We print the original emulation's error numerically, but we
* translate it to netbsd to print it symbolically.
*/
void
eprint(e)
int e;
{
int i = e;
if (current->errnomap) {
/* No remapping for ERESTART and EJUSTRETURN */
/* Kludge for linux that has negative error numbers */
if (current->errnomap[2] > 0 && e < 0)
goto normal;
for (i = 0; i < current->nerrnomap; i++)
if (e == current->errnomap[i])
break;
if (i == current->nerrnomap) {
printf("-1 unknown errno %d", e);
return;
}
}
normal:
switch (i) {
case ERESTART:
(void)printf("RESTART");
break;
case EJUSTRETURN:
(void)printf("JUSTRETURN");
break;
default:
(void)printf("-1 errno %d", e);
if (!plain)
(void)printf(" %s", strerror(i));
}
}
void
ktrnamei(cp, len)
char *cp;
int len;
{
(void)printf("\"%.*s\"\n", len, cp);
}
void
ktremul(name, len, bufsize)
char *name;
int len, bufsize;
{
if (len >= bufsize)
len = bufsize - 1;
name[len] = '\0';
setemul(name, ktr_header.ktr_pid, 1);
emul_changed = 1;
(void)printf("\"%s\"\n", name);
}
void
ktrgenio(ktr, len)
struct ktr_genio *ktr;
int len;
{
int datalen = len - sizeof (struct ktr_genio);
char *dp = (char *)ktr + sizeof (struct ktr_genio);
char *cp;
int col = 0;
int width;
char visbuf[5];
static int screenwidth = 0;
if (screenwidth == 0) {
struct winsize ws;
if (!plain && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
ws.ws_col > 8)
screenwidth = ws.ws_col;
else
screenwidth = 80;
}
printf("fd %d %s %d bytes\n", ktr->ktr_fd,
ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen);
if (maxdata && datalen > maxdata)
datalen = maxdata;
(void)printf(" \"");
col = 8;
for (; datalen > 0; datalen--, dp++) {
(void) vis(visbuf, *dp, VIS_CSTYLE, datalen>1?*(dp+1):0);
cp = visbuf;
/*
* Keep track of printables and
* space chars (like fold(1)).
*/
if (col == 0) {
(void)putchar('\t');
col = 8;
}
switch(*cp) {
case '\n':
col = 0;
(void)putchar('\n');
continue;
case '\t':
width = 8 - (col&07);
break;
default:
width = strlen(cp);
}
if (col + width > (screenwidth-2)) {
(void)printf("\\\n\t");
col = 8;
}
col += width;
do {
(void)putchar(*cp++);
} while (*cp);
}
if (col == 0)
(void)printf(" ");
(void)printf("\"\n");
}
void
ktrpsig(psig)
struct ktr_psig *psig;
{
int signo, first;
(void)printf("SIG%s ", signame(psig->signo, 0));
if (psig->action == SIG_DFL)
(void)printf("SIG_DFL\n");
else {
(void)printf("caught handler=0x%lx mask=(",
(u_long)psig->action);
first = 1;
for (signo = 1; signo < NSIG; signo++) {
if (sigismember(&psig->mask, signo)) {
if (first)
first = 0;
else
(void)printf(",");
(void)printf("%d", signo);
}
}
(void)printf(") code=0x%x\n", psig->code);
}
}
void
ktrcsw(cs)
struct ktr_csw *cs;
{
(void)printf("%s %s\n", cs->out ? "stop" : "resume",
cs->user ? "user" : "kernel");
}
void
ktruser(usr, len)
struct ktr_user *usr;
int len;
{
int i;
unsigned char *dta;
printf("\"%.*s: %d, ", KTR_USER_MAXIDLEN, usr->ktr_id, len);
dta = (unsigned char *)usr;
for(i=sizeof(struct ktr_user); i < len; i++)
printf("%02x", (unsigned int) dta[i]);
printf("\"\n");
}
static const char *
signame(long sig, int xlat)
{
static char buf[64];
if (sig <= 0 || sig >= NSIG) {
(void)snprintf(buf, sizeof(buf), "*unknown %ld*", sig);
return buf;
} else
return sys_signame[(xlat && current->signalmap != NULL) ?
current->signalmap[sig] : sig];
}
void
usage()
{
(void)fprintf(stderr,
"usage: kdump [-dnlRT] [-e emulation] [-f trfile] [-m maxdata] [-t [cnis]]\n");
exit(1);
}