NetBSD-5.0.2/usr.sbin/kvm_mkdb/nlist_aout.c
/* $NetBSD: nlist_aout.c,v 1.8 2003/08/07 11:25:23 agc Exp $ */
/*-
* Copyright (c) 1990, 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. 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.
*/
/*-
* Copyright (c) 1996 Christopher G. Demetriou. 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
#if 0
static char sccsid[] = "from: @(#)nlist.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: nlist_aout.c,v 1.8 2003/08/07 11:25:23 agc Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <a.out.h>
#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
#ifdef NLIST_AOUT
typedef struct nlist NLIST;
#define _strx n_un.n_strx
#define _name n_un.n_name
#define badfmt(str) \
do { \
warnx("%s: %s: %s", kfile, str, strerror(EFTYPE)); \
punt(); \
} while (0)
static void badread __P((int, char *));
static u_long get_kerntext __P((const char *kfn));
static const char *kfile;
int
create_knlist_aout(name, db)
const char *name;
DB *db;
{
int nsyms;
struct exec ebuf;
FILE *fp;
NLIST nbuf;
DBT data, key;
int fd, nr, strsize;
u_long kerntextoff;
char *strtab, buf[1024];
kfile = name;
if ((fd = open(name, O_RDONLY, 0)) < 0) {
warn("%s", kfile);
punt();
}
/* Read in exec structure. */
nr = read(fd, &ebuf, sizeof(struct exec));
if (nr != sizeof(struct exec))
return (-1);
/* Check magic number. */
if (N_BADMAG(ebuf))
return (-1);
/*
* We've recognized it as an a.out binary. From here
* on out, all errors are fatal.
*/
/* Check symbol count. */
if (!ebuf.a_syms)
badfmt("stripped");
/* Seek to string table. */
if (lseek(fd, N_STROFF(ebuf), SEEK_SET) == -1)
badfmt("corrupted string table");
/* Read in the size of the symbol table. */
nr = read(fd, (char *)&strsize, sizeof(strsize));
if (nr != sizeof(strsize))
badread(nr, "no symbol table");
/* Read in the string table. */
strsize -= sizeof(strsize);
if (!(strtab = malloc(strsize))) {
warn("malloc");
punt();
}
if ((nr = read(fd, strtab, strsize)) != strsize)
badread(nr, "corrupted symbol table");
/* Seek to symbol table. */
if (!(fp = fdopen(fd, "r"))) {
warn("%s", name);
punt();
}
if (fseek(fp, N_SYMOFF(ebuf), SEEK_SET) == -1) {
warn("%s", name);
punt();
}
data.data = (u_char *)&nbuf;
data.size = sizeof(NLIST);
kerntextoff = get_kerntext(name);
/* Read each symbol and enter it into the database. */
nsyms = ebuf.a_syms / sizeof(struct nlist);
while (nsyms--) {
if (fread((char *)&nbuf, sizeof (NLIST), 1, fp) != 1) {
if (feof(fp))
badfmt("corrupted symbol table");
warn("%s", name);
punt();
}
if (!nbuf._strx || nbuf.n_type&N_STAB)
continue;
key.data = (u_char *)strtab + nbuf._strx - sizeof(long);
key.size = strlen((char *)key.data);
if (db->put(db, &key, &data, 0)) {
warn("record enter");
punt();
}
if (strcmp((char *)key.data, VRS_SYM) == 0) {
long cur_off, voff;
/*
* Calculate offset relative to a normal (non-kernel)
* a.out. Kerntextoff is where the kernel is really
* loaded; N_TXTADDR is where a normal file is loaded.
* From there, locate file offset in text or data.
*/
voff = nbuf.n_value - kerntextoff + N_TXTADDR(ebuf);
if ((nbuf.n_type & N_TYPE) == N_TEXT)
voff += N_TXTOFF(ebuf) - N_TXTADDR(ebuf);
else
voff += N_DATOFF(ebuf) - N_DATADDR(ebuf);
cur_off = ftell(fp);
if (fseek(fp, voff, SEEK_SET) == -1)
badfmt("corrupted string table");
/*
* Read version string up to, and including newline.
* This code assumes that a newline terminates the
* version line.
*/
if (fgets(buf, sizeof(buf), fp) == NULL)
badfmt("corrupted string table");
key.data = (u_char *)VRS_KEY;
key.size = sizeof(VRS_KEY) - 1;
data.data = (u_char *)buf;
data.size = strlen(buf);
if (db->put(db, &key, &data, 0)) {
warn("record enter");
punt();
}
/* Restore to original values. */
data.data = (u_char *)&nbuf;
data.size = sizeof(NLIST);
if (fseek(fp, cur_off, SEEK_SET) == -1)
badfmt("corrupted string table");
}
}
(void)fclose(fp);
return (0);
}
static void
badread(nr, p)
int nr;
char *p;
{
if (nr < 0) {
warn("%s", kfile);
punt();
}
badfmt(p);
}
/*
* Instead of compiling in KERNTEXTOFF or KERNBASE, try to
* determine the text start address from a standard symbol.
* For backward compatibility, use the old compiled-in way
* when the standard symbol name is not found.
*/
static u_long
get_kerntext(name)
const char *name;
{
struct nlist nl[2];
memset((caddr_t)nl, 0, sizeof(nl));
nl[0].n_un.n_name = "_kernel_text";
if (nlist(name, nl) != 0) {
warnx("%s: %s symbol missing",
name, nl[0].n_un.n_name);
punt();
}
return (nl[0].n_value);
}
#endif /* NLIST_AOUT */