Introducing asf, a helper program for kernel debugging.
This commit is contained in:
Greg Lehey
parent
36572f4867
commit
a945d970d7
7
usr.sbin/asf/Makefile
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7
usr.sbin/asf/Makefile
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# $FreeBSD$
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PROG= asf
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SRCS= asf.c
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MAN= asf.8
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WARNS= 0
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.include <bsd.prog.mk>
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200
usr.sbin/asf/asf.c
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usr.sbin/asf/asf.c
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/* $Id: asf.c,v 1.4 2003/05/04 02:55:20 grog Exp grog $ */
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/* $FreeBSD$ */
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#define MAXLINE 1024
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/file.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <unistd.h>
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#define MAXTOKEN 10
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char *token[MAXTOKEN];
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char *modules_path; /* path relative to kernel
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* build directory */
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char *outfile; /* and where to write the output */
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/*
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* Take a blank separated list of tokens and turn it into a list of
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* individual nul-delimited strings. Build a list of pointers at
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* token, which must have enough space for the tokens. Return the
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* number of tokens, or -1 on error (typically a missing string
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* delimiter).
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*/
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int
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tokenize(char *cptr, char *token[], int maxtoken)
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{
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char delim; /* delimiter to search for */
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int tokennr; /* index of this token */
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for (tokennr = 0; tokennr < maxtoken;) {
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while (isspace(*cptr))
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cptr++; /* skip initial white space */
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if ((*cptr == '\0') || (*cptr == '\n')
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|| (*cptr == '#')) /* end of line */
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return tokennr; /* return number of tokens found */
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delim = *cptr;
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token[tokennr] = cptr; /* point to it */
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tokennr++; /* one more */
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if (tokennr == maxtoken) /* run off the end? */
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return tokennr;
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if ((delim == '\'') || (delim == '"')) { /* delimitered */
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for (;;) {
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cptr++;
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if ((*cptr == delim)
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&& (cptr[-1] != '\\')) { /* found the partner */
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cptr++; /* move on past */
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if (!isspace(*cptr)) /* no space after closing quote */
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return -1;
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*cptr++ = '\0'; /* delimit */
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} else if ((*cptr == '\0')
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|| (*cptr == '\n')) /* end of line */
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return -1;
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}
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} else { /* not quoted */
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while ((*cptr != '\0') && (!isspace(*cptr)) && (*cptr != '\n'))
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cptr++;
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if (*cptr != '\0') /* not end of the line, */
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*cptr++ = '\0'; /* delimit and move to the next */
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}
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}
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return maxtoken; /* can't get here */
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}
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void
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usage(char *myname)
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{
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fprintf(stderr,
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"Usage:\n"
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"%s [-a] [-k] [modules-path [outfile]]\n\n"
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"\t-a\tappend to outfile)\n"
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"\t-k\ttake input from kldstat(8)\n",
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"\t-x\tdon't append \".debug\" to module name\n",
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myname);
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}
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int
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main(int argc, char *argv[])
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{
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char buf[MAXLINE];
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FILE *kldstat;
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FILE *objcopy;
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FILE *out; /* output file */
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char ocbuf[MAXLINE];
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int tokens; /* number of tokens on line */
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char basetoken[MAXLINE];
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int i;
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char *filemode = "w"; /* mode for outfile */
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char cwd[MAXPATHLEN]; /* current directory */
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char *debugname = ".debug"; /* some file names end in this */
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getcwd(cwd, MAXPATHLEN); /* find where we are */
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kldstat = stdin;
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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if (strcmp(argv[i], "-k") == 0) { /* get input from kldstat(8) */
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if (!(kldstat = popen("kldstat", "r"))) {
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perror("Can't start kldstat");
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return 1;
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}
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} else if (strcmp(argv[i], "-a") == 0) /* append to outfile */
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filemode = "a";
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else if (strcmp(argv[i], "-x") == 0) /* no .debug extension */
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debugname = ""; /* nothing */
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else {
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fprintf(stderr,
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"Invalid option: %s, aborting\n",
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argv[i]);
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usage(argv[0]);
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return 1;
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}
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} else if (modules_path == NULL)
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modules_path = argv[i];
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else if (outfile == NULL)
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outfile = argv[i];
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else {
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fprintf(stderr,
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"Extraneous startup information: \"%s\", aborting\n",
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argv[i]);
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usage(argv[0]);
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return 1;
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}
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}
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if (modules_path == NULL)
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modules_path = "modules";
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if (outfile == NULL)
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outfile = ".asf";
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if ((out = fopen(outfile, filemode)) == NULL) {
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fprintf(stderr,
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"Can't open output file %s: %s (%d)\n",
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outfile,
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strerror(errno),
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errno);
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return 1;
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}
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while (fgets(buf, MAXLINE, kldstat)) {
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if ((!(strstr(buf, "kernel")))
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&& buf[0] != 'I') {
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quad_t base;
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quad_t textaddr;
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quad_t dataaddr;
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quad_t bssaddr;
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tokens = tokenize(buf, token, MAXTOKEN);
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base = strtoll(token[2], NULL, 16);
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strcpy(basetoken, token[4]);
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basetoken[strlen(basetoken) - 3] = '\0'; /* cut off the .ko */
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snprintf(ocbuf,
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MAXLINE,
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"/usr/bin/objdump --section-headers %s/%s/%s%s",
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modules_path,
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basetoken,
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token[4],
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debugname);
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if (!(objcopy = popen(ocbuf, "r"))) {
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fprintf(stderr,
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"Can't start %s: %s (%d)\n",
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ocbuf,
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strerror(errno),
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errno);
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return 1;
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}
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while (fgets(ocbuf, MAXLINE, objcopy)) {
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int octokens;
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char *octoken[MAXTOKEN];
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octokens = tokenize(ocbuf, octoken, MAXTOKEN);
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if (octokens > 1) {
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if (!strcmp(octoken[1], ".text"))
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textaddr = strtoll(octoken[3], NULL, 16) + base;
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else if (!strcmp(octoken[1], ".data"))
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dataaddr = strtoll(octoken[3], NULL, 16) + base;
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else if (!strcmp(octoken[1], ".bss"))
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bssaddr = strtoll(octoken[3], NULL, 16) + base;
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}
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}
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if (textaddr) { /* we must have a text address */
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fprintf(out,
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"add-symbol-file %s/%s/%s/%s%s 0x%llx",
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cwd,
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modules_path,
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basetoken,
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token[4],
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debugname,
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textaddr);
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if (dataaddr)
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fprintf(out, " -s .data 0x%llx", dataaddr);
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if (bssaddr)
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fprintf(out, " -s .bss 0x%llx", bssaddr);
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fprintf(out, "\n");
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}
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}
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}
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return 0;
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}
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