NetBSD/usr.bin/kdump/kdump.c

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/* $NetBSD: kdump.c,v 1.20 1998/03/30 02:26:07 mrg Exp $ */
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/*-
* 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>
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#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#ifndef lint
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#if 0
static char sccsid[] = "@(#)kdump.c 8.4 (Berkeley) 4/28/95";
#else
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__RCSID("$NetBSD: kdump.c,v 1.20 1998/03/30 02:26:07 mrg Exp $");
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#endif
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#endif /* not lint */
#include <sys/param.h>
#define _KERNEL
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#include <sys/errno.h>
#undef _KERNEL
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#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>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
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#include "ktrace.h"
int timestamp, decimal, fancy = 1, tail, maxdata;
char *tracefile = DEF_TRACEFILE;
struct ktr_header ktr_header;
#define eqs(s1, s2) (strcmp((s1), (s2)) == 0)
#include <sys/syscall.h>
#include "../../sys/compat/freebsd/freebsd_syscall.h"
#include "../../sys/compat/hpux/hpux_syscall.h"
#include "../../sys/compat/ibcs2/ibcs2_syscall.h"
#include "../../sys/compat/linux/linux_syscall.h"
#include "../../sys/compat/osf1/osf1_syscall.h"
#include "../../sys/compat/sunos/sunos_syscall.h"
#include "../../sys/compat/svr4/svr4_syscall.h"
#include "../../sys/compat/ultrix/ultrix_syscall.h"
#define KTRACE
#include "../../sys/kern/syscalls.c"
#include "../../sys/compat/freebsd/freebsd_syscalls.c"
#include "../../sys/compat/hpux/hpux_syscalls.c"
#include "../../sys/compat/ibcs2/ibcs2_syscalls.c"
#include "../../sys/compat/linux/linux_syscalls.c"
#include "../../sys/compat/osf1/osf1_syscalls.c"
#include "../../sys/compat/sunos/sunos_syscalls.c"
#include "../../sys/compat/svr4/svr4_syscalls.c"
#include "../../sys/compat/ultrix/ultrix_syscalls.c"
#undef KTRACE
struct emulation {
char *name; /* Emulation name */
char **sysnames; /* Array of system call names */
int nsysnames; /* Number of */
};
static struct emulation emulations[] = {
{ "netbsd", syscallnames, SYS_MAXSYSCALL },
{ "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL },
{ "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL },
{ "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL },
{ "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL },
{ "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL },
{ "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL },
{ "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL },
{ "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL },
{ NULL, NULL, 0 }
};
struct emulation *current;
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",
};
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));
void ktrgenio __P((struct ktr_genio *, int));
void ktrpsig __P((struct ktr_psig *));
void ktrcsw __P((struct ktr_csw *));
void usage __P((void));
void setemul __P((char *));
char *ioctlname __P((long));
int
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main(argc, argv)
int argc;
char *argv[];
{
int ch, ktrlen, size;
void *m;
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int trpoints = ALL_POINTS;
current = &emulations[0]; /* NetBSD */
while ((ch = getopt(argc, argv, "e:f:dlm:nRTt:")) != -1)
switch (ch) {
case 'e':
setemul(optarg);
break;
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case 'f':
tracefile = optarg;
break;
case 'd':
decimal = 1;
break;
case 'l':
tail = 1;
break;
case 'm':
maxdata = atoi(optarg);
break;
case 'n':
fancy = 0;
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);
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break;
default:
usage();
}
argv += optind;
argc -= optind;
if (argc > 1)
usage();
m = malloc(size = 1025);
if (m == NULL)
errx(1, "%s", strerror(ENOMEM));
if (!freopen(tracefile, "r", stdin))
err(1, "%s", tracefile);
while (fread_tail((char *)&ktr_header, sizeof(struct ktr_header), 1)) {
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if (trpoints & (1<<ktr_header.ktr_type))
dumpheader(&ktr_header);
if ((ktrlen = ktr_header.ktr_len) < 0)
errx(1, "bogus length 0x%x", ktrlen);
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if (ktrlen > size) {
m = (void *)realloc(m, ktrlen+1);
if (m == NULL)
errx(1, "%s", strerror(ENOMEM));
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size = ktrlen;
}
if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
errx(1, "data too short");
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if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
continue;
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);
break;
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}
if (tail)
(void)fflush(stdout);
}
return (0);
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}
int
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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
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dumpheader(kth)
struct ktr_header *kth;
{
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char unknown[64], *type;
static struct timeval prevtime;
struct timeval temp;
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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;
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default:
(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
type = unknown;
}
(void)printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN, kth->ktr_comm);
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if (timestamp) {
if (timestamp == 2) {
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timersub(&kth->ktr_time, &prevtime, &temp);
prevtime = kth->ktr_time;
} else
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temp = kth->ktr_time;
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(void)printf("%ld.%06ld ", temp.tv_sec, temp.tv_usec);
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}
(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, (cmd >> 8) & 0xff, cmd & 0xff);
if ((cmd & IOC_VOID) == 0)
printf(decimal ? ",%ld)" : ",%#lx)", (cmd >> 16) & 0xff);
else
printf(")");
}
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void
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ktrsyscall(ktr)
struct ktr_syscall *ktr;
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{
int argsize = ktr->ktr_argsize;
register_t *ap;
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if (ktr->ktr_code >= current->nsysnames || ktr->ktr_code < 0)
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(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) {
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char c = '(';
if (fancy) {
if (ktr->ktr_code == SYS_ioctl) {
char *cp;
if (decimal)
(void)printf("(%ld", (long)*ap);
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else
(void)printf("(%#lx", (long)*ap);
ap++;
argsize -= sizeof(register_t);
if ((cp = ioctlname(*ap)) != NULL)
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(void)printf(",%s", cp);
else
ioctldecode(*ap);
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c = ',';
ap++;
argsize -= sizeof(register_t);
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} else if (ktr->ktr_code == SYS_ptrace) {
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if (*ap >= 0 && *ap <=
sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
(void)printf("(%s", ptrace_ops[*ap]);
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else
(void)printf("(%ld", (long)*ap);
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c = ',';
ap++;
argsize -= sizeof(register_t);
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}
}
while (argsize) {
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if (decimal)
(void)printf("%c%ld", c, (long)*ap);
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else
(void)printf("%c%#lx", c, (long)*ap);
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c = ',';
ap++;
argsize -= sizeof(register_t);
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}
(void)putchar(')');
}
(void)putchar('\n');
}
void
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ktrsysret(ktr)
struct ktr_sysret *ktr;
{
int ret = ktr->ktr_retval;
int error = ktr->ktr_error;
int code = ktr->ktr_code;
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if (code >= current->nsysnames || code < 0)
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(void)printf("[%d] ", code);
else
(void)printf("%s ", current->sysnames[code]);
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if (error == 0) {
if (fancy) {
(void)printf("%d", ret);
if (ret < 0 || ret > 9)
(void)printf("/%#x", ret);
} else {
if (decimal)
(void)printf("%d", ret);
else
(void)printf("%#x", ret);
}
} else if (error == ERESTART)
(void)printf("RESTART");
else if (error == EJUSTRETURN)
(void)printf("JUSTRETURN");
else {
(void)printf("-1 errno %d", ktr->ktr_error);
if (fancy)
(void)printf(" %s", strerror(ktr->ktr_error));
}
(void)putchar('\n');
}
void
ktrnamei(cp, len)
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char *cp;
int len;
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{
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(void)printf("\"%.*s\"\n", len, cp);
}
void
ktremul(cp, len)
char *cp;
int len;
{
char name[1024];
if (len >= sizeof(name))
errx(1, "Emulation name too long");
strncpy(name, cp, len);
name[len] = '\0';
(void)printf("\"%s\"\n", name);
setemul(name);
}
void
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ktrgenio(ktr, len)
struct ktr_genio *ktr;
int len;
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{
int datalen = len - sizeof (struct ktr_genio);
char *dp = (char *)ktr + sizeof (struct ktr_genio);
char *cp;
int col = 0;
int width;
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char visbuf[5];
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static int screenwidth = 0;
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if (screenwidth == 0) {
struct winsize ws;
if (fancy && 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++) {
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(void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
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
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ktrpsig(psig)
struct ktr_psig *psig;
{
(void)printf("SIG%s ", sys_signame[psig->signo]);
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if (psig->action == SIG_DFL)
(void)printf("SIG_DFL\n");
else
(void)printf("caught handler=0x%lx mask=0x%x code=0x%x\n",
(u_long)psig->action, psig->mask, psig->code);
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}
void
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ktrcsw(cs)
struct ktr_csw *cs;
{
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(void)printf("%s %s\n", cs->out ? "stop" : "resume",
cs->user ? "user" : "kernel");
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}
void
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usage()
{
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(void)fprintf(stderr,
"usage: kdump [-dnlRT] [-e emulation] [-f trfile] [-m maxdata] [-t [cnis]]\n");
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exit(1);
}
void
setemul(name)
char *name;
{
int i;
for (i = 0; emulations[i].name != NULL; i++)
if (strcmp(emulations[i].name, name) == 0) {
current = &emulations[i];
return;
}
warnx("Emulation `%s' unknown", name);
}