/*
* getoffsets - read the magic offsets from the specified file
*/
static void
getoffsets(
off_t *tick_off,
off_t *tickadj_off,
off_t *dosync_off,
off_t *noprintf_off
)
{
#ifndef NOKMEM
# ifndef HAVE_KVM_OPEN
const char **kname;
# endif
#endif
#ifndef NOKMEM
# ifdef NLIST_NAME_UNION
# define NL_B {{
# define NL_E }}
# else
# define NL_B {
# define NL_E }
# endif
#endif
#define K_FILLER_NAME "DavidLetterman"
#ifdef NLIST_EXTRA_INDIRECTION
int i;
#endif
#ifndef NOKMEM
static struct nlist nl[] =
{
NL_B
#ifdef K_TICKADJ_NAME
#define N_TICKADJ 0
K_TICKADJ_NAME
#else
K_FILLER_NAME
#endif
NL_E,
NL_B
#ifdef K_TICK_NAME
#define N_TICK 1
K_TICK_NAME
#else
K_FILLER_NAME
#endif
NL_E,
NL_B
#ifdef K_DOSYNCTODR_NAME
#define N_DOSYNC 2
K_DOSYNCTODR_NAME
#else
K_FILLER_NAME
#endif
NL_E,
NL_B
#ifdef K_NOPRINTF_NAME
#define N_NOPRINTF 3
K_NOPRINTF_NAME
#else
K_FILLER_NAME
#endif
NL_E,
NL_B "" NL_E,
};
#ifndef HAVE_KVM_OPEN
static const char *kernels[] =
{
#ifdef HAVE_GETBOOTFILE
NULL, /* *** SEE BELOW! *** */
#endif
"/kernel/unix",
"/kernel",
"/vmunix",
"/unix",
"/mach",
"/hp-ux",
"/386bsd",
"/netbsd",
"/stand/vmunix",
"/bsd",
NULL
};
#endif /* not HAVE_KVM_OPEN */
#ifdef HAVE_KVM_OPEN
/*
* Solaris > 2.5 doesn't have a kernel file. Use the kvm_* interface
* to read the kernel name list. -- stolcke 3/4/96
*/
kvm_t *kvm_handle = kvm_open(NULL, NULL, NULL, O_RDONLY, progname);
if (kvm_handle == NULL)
{
(void) fprintf(stderr,
"%s: kvm_open failed\n",
progname);
exit(1);
}
if (kvm_nlist(kvm_handle, nl) == -1)
{
(void) fprintf(stderr,
"%s: kvm_nlist failed\n",
progname);
exit(1);
}
kvm_close(kvm_handle);
#else /* not HAVE_KVM_OPEN */
#ifdef HAVE_GETBOOTFILE /* *** SEE HERE! *** */
if (kernels[0] == NULL)
{
char * cp = (char *)getbootfile();
if (cp)
{
kernels[0] = cp;
}
else
{
kernels[0] = "/Placeholder";
}
}
#endif /* HAVE_GETBOOTFILE */
for (kname = kernels; *kname != NULL; kname++)
{
struct stat stbuf;
if (stat(*kname, &stbuf) == -1)
{
continue;
}
if (nlist(*kname, nl) >= 0)
{
break;
}
else
{
(void) fprintf(stderr,
"%s: nlist didn't find needed symbols from <%s>: %s\n",
progname, *kname, strerror(errno));
}
}
if (*kname == NULL)
{
(void) fprintf(stderr,
"%s: Couldn't find the kernel\n",
progname);
exit(1);
}
#endif /* HAVE_KVM_OPEN */
if (dokmem)
{
file = kmem;
fd = openfile(file, O_RDONLY);
#ifdef NLIST_EXTRA_INDIRECTION
/*
* Go one more round of indirection.
*/
for (i = 0; i < (sizeof(nl) / sizeof(struct nlist)); i++)
{
if ((nl[i].n_value) && (nl[i].n_sclass == 0x6b))
{
readvar(fd, nl[i].n_value, &nl[i].n_value);
}
}
#endif /* NLIST_EXTRA_INDIRECTION */
}
#endif /* not NOKMEM */
*tickadj_off = 0;
*tick_off = 0;
*dosync_off = 0;
*noprintf_off = 0;
#if defined(N_TICKADJ)
*tickadj_off = nl[N_TICKADJ].n_value;
#endif
#if defined(N_TICK)
*tick_off = nl[N_TICK].n_value;
#endif
#if defined(N_DOSYNC)
*dosync_off = nl[N_DOSYNC].n_value;
#endif
#if defined(N_NOPRINTF)
*noprintf_off = nl[N_NOPRINTF].n_value;
#endif
return;
}
static kvm_t *
_kvm_open(kvm_t *kd, const char *uf, const char *mf, int flag, char *errout)
{
struct stat st;
kd->vmfd = -1;
kd->pmfd = -1;
kd->nlfd = -1;
kd->vmst = 0;
kd->procbase = 0;
kd->argspc = 0;
kd->argv = 0;
if (uf == 0)
uf = getbootfile();
else if (strlen(uf) >= MAXPATHLEN) {
_kvm_err(kd, kd->program, "exec file name too long");
goto failed;
}
if (flag & ~O_RDWR) {
_kvm_err(kd, kd->program, "bad flags arg");
goto failed;
}
if (mf == 0)
mf = _PATH_MEM;
if ((kd->pmfd = open(mf, flag | O_CLOEXEC, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;
}
if (fstat(kd->pmfd, &st) < 0) {
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;
}
if (S_ISREG(st.st_mode) && st.st_size <= 0) {
errno = EINVAL;
_kvm_syserr(kd, kd->program, "empty file");
goto failed;
}
if (S_ISCHR(st.st_mode)) {
/*
* If this is a character special device, then check that
* it's /dev/mem. If so, open kmem too. (Maybe we should
* make it work for either /dev/mem or /dev/kmem -- in either
* case you're working with a live kernel.)
*/
if (strcmp(mf, _PATH_DEVNULL) == 0) {
kd->vmfd = open(_PATH_DEVNULL, O_RDONLY | O_CLOEXEC);
return (kd);
} else if (strcmp(mf, _PATH_MEM) == 0) {
if ((kd->vmfd = open(_PATH_KMEM, flag | O_CLOEXEC)) <
0) {
_kvm_syserr(kd, kd->program, "%s", _PATH_KMEM);
goto failed;
}
return (kd);
}
}
/*
* This is a crash dump.
* Initialize the virtual address translation machinery,
* but first setup the namelist fd.
*/
if ((kd->nlfd = open(uf, O_RDONLY | O_CLOEXEC, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (strncmp(mf, _PATH_FWMEM, strlen(_PATH_FWMEM)) == 0)
kd->rawdump = 1;
if (_kvm_initvtop(kd) < 0)
goto failed;
return (kd);
failed:
/*
* Copy out the error if doing sane error semantics.
*/
if (errout != 0)
strlcpy(errout, kd->errbuf, _POSIX2_LINE_MAX);
(void)kvm_close(kd);
return (0);
}
static void
DoFile(const char *savedir, const char *device)
{
static char *buf = NULL;
struct partinfo dpart;
struct kerneldumpheader kdhf, kdhl;
off_t mediasize, dumpsize, firsthd, lasthd, dmpcnt;
FILE *info, *fp, *fpkern;
mode_t oumask;
int fd, fdinfo, fdkernin, error, wl;
int nr, nw, hs, he = 0;
int bounds, status;
u_int sectorsize;
bounds = getbounds();
dmpcnt = 0;
mediasize = 0;
status = STATUS_UNKNOWN;
if (buf == NULL) {
buf = malloc(BUFFERSIZE);
if (buf == NULL) {
syslog(LOG_ERR, "%m");
return;
}
}
if (verbose)
printf("checking for kernel dump on device %s\n", device);
fd = open(device, O_RDWR);
if (fd < 0) {
syslog(LOG_ERR, "%s: %m", device);
return;
}
bzero(&dpart, sizeof(dpart));
error = ioctl(fd, DIOCGPART, &dpart);
if (error) {
syslog(LOG_ERR,
"couldn't find media and/or sector size of %s: %m", device);
goto closefd;
}
mediasize = dpart.media_size;
sectorsize = dpart.media_blksize;
if (verbose) {
printf("mediasize = %lld\n", (long long)mediasize);
printf("sectorsize = %u\n", sectorsize);
}
lasthd = mediasize - sectorsize;
lseek(fd, lasthd, SEEK_SET);
error = read(fd, &kdhl, sizeof kdhl);
if (error != sizeof kdhl) {
syslog(LOG_ERR,
"error reading last dump header at offset %lld in %s: %m",
(long long)lasthd, device);
goto closefd;
}
if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic)) {
if (verbose)
printf("magic mismatch on last dump header on %s\n",
device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED,
sizeof kdhl.magic) == 0) {
if (verbose)
printf("forcing magic on %s\n", device);
memcpy(kdhl.magic, KERNELDUMPMAGIC,
sizeof kdhl.magic);
} else {
syslog(LOG_ERR, "unable to force dump - bad magic");
goto closefd;
}
}
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
syslog(LOG_ERR,
"unknown version (%d) in last dump header on %s",
dtoh32(kdhl.version), device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
}
nfound++;
if (clear)
goto nuke;
if (kerneldump_parity(&kdhl)) {
syslog(LOG_ERR,
"parity error on last dump header on %s", device);
nerr++;
status = STATUS_BAD;
if (force == 0)
goto closefd;
}
dumpsize = dtoh64(kdhl.dumplength);
firsthd = lasthd - dumpsize - sizeof kdhf;
lseek(fd, firsthd, SEEK_SET);
error = read(fd, &kdhf, sizeof kdhf);
if (error != sizeof kdhf) {
syslog(LOG_ERR,
"error reading first dump header at offset %lld in %s: %m",
(long long)firsthd, device);
nerr++;
goto closefd;
}
if (verbose >= 2) {
printf("First dump headers:\n");
printheader(stdout, &kdhf, device, bounds, -1);
printf("\nLast dump headers:\n");
printheader(stdout, &kdhl, device, bounds, -1);
printf("\n");
}
if (memcmp(&kdhl, &kdhf, sizeof kdhl)) {
syslog(LOG_ERR,
"first and last dump headers disagree on %s", device);
nerr++;
status = STATUS_BAD;
if (force == 0)
goto closefd;
} else {
status = STATUS_GOOD;
}
if (checkfor) {
printf("A dump exists on %s\n", device);
close(fd);
exit(0);
}
if (kdhl.panicstring[0])
syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring);
else
syslog(LOG_ALERT, "reboot");
if (verbose)
printf("Checking for available free space\n");
if (!check_space(savedir, dumpsize)) {
nerr++;
goto closefd;
}
writebounds(bounds + 1);
/*
* Write kernel file.
*/
fdkernin = open(getbootfile(), O_RDONLY, 0);
if (fdkernin < 0) {
syslog(LOG_ERR, "%s: %m", getbootfile());
}
if (compress) {
sprintf(buf, "kern.%d.gz", bounds);
fpkern = zopen(buf, "w");
} else {
sprintf(buf, "kern.%d", bounds);
fpkern = fopen(buf, "w");
}
if (fpkern == NULL) {
syslog(LOG_ERR, "%s: %m", buf);
close(fdkernin);
}
syslog(LOG_NOTICE, "writing %skernel to %s",
compress ? "compressed " : "", buf);
while ((nr = read(fdkernin, buf, sizeof(buf))) > 0) {
nw = fwrite(buf, 1, nr, fpkern);
if (nw != nr) {
syslog(LOG_ERR, "kern.%d: %m", bounds);
syslog(LOG_WARNING,
"WARNING: kernel may be incomplete");
exit(1);
}
}
if (nr < 0) {
syslog(LOG_ERR, "%s: %m", getbootfile());
syslog(LOG_WARNING,
"WARNING: kernel may be incomplete");
exit(1);
}
fclose(fpkern);
close(fdkernin);
sprintf(buf, "info.%d", bounds);
/*
* Create or overwrite any existing dump header files.
*/
fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fdinfo < 0) {
syslog(LOG_ERR, "%s: %m", buf);
nerr++;
goto closefd;
}
oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/
if (compress) {
sprintf(buf, "vmcore.%d.gz", bounds);
fp = zopen(buf, "w");
} else {
sprintf(buf, "vmcore.%d", bounds);
fp = fopen(buf, "w");
}
if (fp == NULL) {
syslog(LOG_ERR, "%s: %m", buf);
close(fdinfo);
nerr++;
goto closefd;
}
(void)umask(oumask);
info = fdopen(fdinfo, "w");
if (info == NULL) {
syslog(LOG_ERR, "fdopen failed: %m");
nerr++;
goto closefd;
}
if (verbose)
printheader(stdout, &kdhl, device, bounds, status);
printheader(info, &kdhl, device, bounds, status);
fclose(info);
syslog(LOG_NOTICE, "writing %score to %s",
compress ? "compressed " : "", buf);
while (dumpsize > 0) {
wl = BUFFERSIZE;
if (wl > dumpsize)
wl = dumpsize;
nr = read(fd, buf, wl);
if (nr != wl) {
if (nr == 0)
syslog(LOG_WARNING,
"WARNING: EOF on dump device");
else
syslog(LOG_ERR, "read error on %s: %m", device);
nerr++;
goto closeall;
}
if (compress) {
nw = fwrite(buf, 1, wl, fp);
} else {
for (nw = 0; nw < nr; nw = he) {
/* find a contiguous block of zeroes */
for (hs = nw; hs < nr; hs += BLOCKSIZE) {
for (he = hs; he < nr && buf[he] == 0;
++he)
/* nothing */ ;
/* is the hole long enough to matter? */
if (he >= hs + BLOCKSIZE)
break;
}
/* back down to a block boundary */
he &= BLOCKMASK;
/*
* 1) Don't go beyond the end of the buffer.
* 2) If the end of the buffer is less than
* BLOCKSIZE bytes away, we're at the end
* of the file, so just grab what's left.
*/
if (hs + BLOCKSIZE > nr)
hs = he = nr;
/*
* At this point, we have a partial ordering:
* nw <= hs <= he <= nr
* If hs > nw, buf[nw..hs] contains non-zero data.
* If he > hs, buf[hs..he] is all zeroes.
*/
if (hs > nw)
if (fwrite(buf + nw, hs - nw, 1, fp)
!= 1)
break;
if (he > hs)
if (fseeko(fp, he - hs, SEEK_CUR) == -1)
break;
}
}
if (nw != wl) {
syslog(LOG_ERR,
"write error on vmcore.%d file: %m", bounds);
syslog(LOG_WARNING,
"WARNING: vmcore may be incomplete");
nerr++;
goto closeall;
}
if (verbose) {
dmpcnt += wl;
printf("%llu\r", (unsigned long long)dmpcnt);
fflush(stdout);
}
dumpsize -= wl;
}
if (verbose)
printf("\n");
if (fclose(fp) < 0) {
syslog(LOG_ERR, "error on vmcore.%d: %m", bounds);
nerr++;
goto closeall;
}
nsaved++;
if (verbose)
printf("dump saved\n");
nuke:
if (clear || !keep) {
if (verbose)
printf("clearing dump header\n");
memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic);
lseek(fd, lasthd, SEEK_SET);
error = write(fd, &kdhl, sizeof kdhl);
if (error != sizeof kdhl)
syslog(LOG_ERR,
"error while clearing the dump header: %m");
}
close(fd);
return;
closeall:
fclose(fp);
closefd:
close(fd);
}
int
main(int argc, char **argv)
{
int ch, mode, disp, accessmode;
struct kvmvars kvmvars;
const char *systemname;
char *kmemf;
if (seteuid(getuid()) != 0) {
err(1, "seteuid failed\n");
}
kmemf = NULL;
systemname = NULL;
while ((ch = getopt(argc, argv, "M:N:Bbhpr")) != -1) {
switch((char)ch) {
case 'M':
kmemf = optarg;
kflag = 1;
break;
case 'N':
systemname = optarg;
break;
case 'B':
Bflag = 1;
break;
case 'b':
bflag = 1;
break;
case 'h':
hflag = 1;
break;
case 'p':
pflag = 1;
break;
case 'r':
rflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
systemname = *argv;
if (*++argv) {
kmemf = *argv;
++kflag;
}
}
#endif
if (systemname == NULL)
systemname = getbootfile();
accessmode = openfiles(systemname, kmemf, &kvmvars);
mode = getprof(&kvmvars);
if (hflag)
disp = GMON_PROF_OFF;
else if (Bflag)
disp = GMON_PROF_HIRES;
else if (bflag)
disp = GMON_PROF_ON;
else
disp = mode;
if (pflag)
dumpstate(&kvmvars);
if (rflag)
reset(&kvmvars);
if (accessmode == O_RDWR)
setprof(&kvmvars, disp);
(void)fprintf(stdout, "kgmon: kernel profiling is %s.\n",
disp == GMON_PROF_OFF ? "off" :
disp == GMON_PROF_HIRES ? "running (high resolution)" :
disp == GMON_PROF_ON ? "running" :
disp == GMON_PROF_BUSY ? "busy" :
disp == GMON_PROF_ERROR ? "off (error)" :
"in an unknown state");
return (0);
}
int
main(int argc, char **argv)
{
int ch, i, jflag, npcbs;
const char *core, *syst;
nl[0].n_name = strdup("_tcp_debug");
nl[1].n_name = strdup("_tcp_debx");
jflag = npcbs = 0;
while ((ch = getopt(argc, argv, "afjp:st")) != -1)
switch (ch) {
case 'a':
++aflag;
break;
case 'f':
++follow;
setlinebuf(stdout);
break;
case 'j':
++jflag;
break;
case 'p':
if (npcbs >= TCP_NDEBUG)
errx(1, "too many pcb's specified");
(void)sscanf(optarg, "%x", (int *)&tcp_pcbs[npcbs++]);
break;
case 's':
++sflag;
break;
case 't':
++tflag;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
core = _PATH_KMEM;
if (argc > 0) {
syst = *argv;
argc--, argv++;
if (argc > 0) {
core = *argv;
argc--, argv++;
++kflag;
}
/*
* Discard setgid privileges if not the running kernel so that
* bad guys can't print interesting stuff from kernel memory.
*/
if (setgid(getgid()) != 0)
err(1, "setgid");
}
else
syst = getbootfile();
if (nlist(syst, nl) < 0 || !nl[0].n_value)
errx(1, "%s: no namelist", syst);
if ((memf = open(core, O_RDONLY)) < 0)
err(2, "%s", core);
if (setgid(getgid()) != 0)
err(1, "setgid");
if (kflag)
errx(1, "can't do core files yet");
(void)klseek(memf, (off_t)nl[N_TCP_DEBX].n_value, L_SET);
if (read(memf, (char *)&tcp_debx, sizeof(tcp_debx)) !=
sizeof(tcp_debx))
err(3, "tcp_debx");
(void)klseek(memf, (off_t)nl[N_TCP_DEBUG].n_value, L_SET);
if (read(memf, (char *)tcp_debug, sizeof(tcp_debug)) !=
sizeof(tcp_debug))
err(3, "tcp_debug");
/*
* If no control blocks have been specified, figure
* out how many distinct one we have and summarize
* them in tcp_pcbs for sorting the trace records
* below.
*/
if (!npcbs) {
for (i = 0; i < TCP_NDEBUG; i++) {
register struct tcp_debug *td = &tcp_debug[i];
register int j;
if (td->td_tcb == 0)
continue;
for (j = 0; j < npcbs; j++)
if (tcp_pcbs[j] == td->td_tcb)
break;
if (j >= npcbs)
tcp_pcbs[npcbs++] = td->td_tcb;
}
if (!npcbs)
exit(0);
}
qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric);
if (jflag) {
for (i = 0;;) {
printf("%p", (void *)tcp_pcbs[i]);
if (++i == npcbs)
break;
fputs(", ", stdout);
}
putchar('\n');
}
else for (i = 0; i < npcbs; i++) {
printf("\n%p:\n", tcp_pcbs[i]);
dotrace(tcp_pcbs[i]);
}
exit(0);
}
int
main(int argc, char *argv[])
{
char path[PATH_MAX];
struct stat st;
struct captured_main_args args;
char *s;
int a, ch;
dumpnr = NULL;
strlcpy(crashdir, "/var/crash", sizeof(crashdir));
s = getenv("KGDB_CRASH_DIR");
if (s != NULL)
strlcpy(crashdir, s, sizeof(crashdir));
/* Convert long options into short options. */
for (a = 1; a < argc; a++) {
s = argv[a];
if (s[0] == '-') {
s++;
/* Long options take either 1 or 2 dashes. */
if (s[0] == '-')
s++;
if (strcmp(s, "quiet") == 0)
argv[a] = "-q";
else if (strcmp(s, "fullname") == 0)
argv[a] = "-f";
}
}
kgdb_quiet = 0;
memset (&args, 0, sizeof args);
args.interpreter_p = INTERP_CONSOLE;
args.argv = malloc(sizeof(char *));
args.argv[0] = argv[0];
while ((ch = getopt(argc, argv, "ab:c:d:fn:qr:vw")) != -1) {
switch (ch) {
case 'a':
annotation_level++;
break;
case 'b': {
int i;
char *p;
i = strtol(optarg, &p, 0);
if (*p != '\0' || p == optarg)
warnx("warning: could not set baud rate to `%s'.\n",
optarg);
else
baud_rate = i;
break;
}
case 'c': /* use given core file. */
if (vmcore != NULL) {
warnx("option %c: can only be specified once",
optopt);
usage();
/* NOTREACHED */
}
vmcore = strdup(optarg);
break;
case 'd': /* lookup dumps in given directory. */
strlcpy(crashdir, optarg, sizeof(crashdir));
break;
case 'f':
annotation_level = 1;
break;
case 'n': /* use dump with given number. */
dumpnr = optarg;
break;
case 'q':
kgdb_quiet = 1;
add_arg(&args, "-q");
break;
case 'r': /* use given device for remote session. */
if (remote != NULL) {
warnx("option %c: can only be specified once",
optopt);
usage();
/* NOTREACHED */
}
remote = strdup(optarg);
break;
case 'v': /* increase verbosity. */
verbose++;
break;
case 'w': /* core file is writeable. */
add_arg(&args, "--write");
break;
case '?':
default:
usage();
}
}
if (((vmcore != NULL) ? 1 : 0) + ((dumpnr != NULL) ? 1 : 0) +
((remote != NULL) ? 1 : 0) > 1) {
warnx("options -c, -n and -r are mutually exclusive");
usage();
/* NOTREACHED */
}
if (verbose > 1)
warnx("using %s as the crash directory", crashdir);
if (argc > optind)
kernel = strdup(argv[optind++]);
if (argc > optind && (dumpnr != NULL || remote != NULL)) {
warnx("options -n and -r do not take a core file. Ignored");
optind = argc;
}
if (dumpnr != NULL) {
snprintf(path, sizeof(path), "%s/vmcore.%s", crashdir, dumpnr);
if (stat(path, &st) == -1)
err(1, "%s", path);
if (!S_ISREG(st.st_mode))
errx(1, "%s: not a regular file", path);
vmcore = strdup(path);
} else if (remote != NULL) {
verify_remote();
} else if (argc > optind) {
if (vmcore == NULL)
vmcore = strdup(argv[optind++]);
if (argc > optind)
warnx("multiple core files specified. Ignored");
} else if (vmcore == NULL && kernel == NULL) {
vmcore = strdup(_PATH_MEM);
kernel = strdup(getbootfile());
}
if (verbose) {
if (vmcore != NULL)
warnx("core file: %s", vmcore);
if (remote != NULL)
warnx("device file: %s", remote);
if (kernel != NULL)
warnx("kernel image: %s", kernel);
}
/* A remote target requires an explicit kernel argument. */
if (remote != NULL && kernel == NULL) {
warnx("remote debugging requires a kernel");
usage();
/* NOTREACHED */
}
/* If we don't have a kernel image yet, try to find one. */
if (kernel == NULL) {
if (dumpnr != NULL)
kernel_from_dumpnr(dumpnr);
if (kernel == NULL)
errx(1, "couldn't find a suitable kernel image");
if (verbose)
warnx("kernel image: %s", kernel);
}
/* Set an alternate prompt. */
add_arg(&args, "-iex");
add_arg(&args, "set prompt (kgdb) ");
/* Open the vmcore if requested. */
if (vmcore != NULL) {
add_arg(&args, "-ex");
if (asprintf(&s, "target vmcore %s", vmcore) < 0)
err(1, "couldn't build command line");
add_arg(&args, s);
}
/* Open the remote target if requested. */
if (remote != NULL) {
add_arg(&args, "-ex");
if (asprintf(&s, "target remote %s", remote) < 0)
err(1, "couldn't build command line");
add_arg(&args, s);
}
add_arg(&args, kernel);
/* The libgdb code uses optind too. Reset it... */
optind = 0;
/* Terminate argv list. */
add_arg(&args, NULL);
return (gdb_main(&args));
}