164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)nlist.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <a.out.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.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 <unistd.h>
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#include "extern.h"
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typedef struct nlist NLIST;
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#define _strx n_un.n_strx
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#define _name n_un.n_name
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#define badfmt(str) errx(1, "%s: %s: %s", kfile, str, strerror(EFTYPE))
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static char *kfile;
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void
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create_knlist(name, db)
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char *name;
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DB *db;
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{
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register int nsyms;
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struct exec *ebuf;
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NLIST *nbuf;
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DBT data, key;
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int fd;
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char *strtab;
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u_char *filep;
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char *vp;
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struct stat sst;
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long cur_off, voff;
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kfile = name;
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if ((fd = open(name, O_RDONLY, 0)) < 0)
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err(1, "%s", name);
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fstat(fd,&sst);
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filep = (u_char*)mmap(0, sst.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
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/* Read in exec structure. */
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ebuf = (struct exec *) filep;
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/* Check magic number and symbol count. */
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if (N_BADMAG(*ebuf))
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badfmt("bad magic number");
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if (!ebuf->a_syms)
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badfmt("stripped");
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strtab = filep + N_STROFF(*ebuf) + sizeof (int);
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/* Seek to symbol table. */
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cur_off = N_SYMOFF(*ebuf);
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/* Read each symbol and enter it into the database. */
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nsyms = ebuf->a_syms / sizeof(struct nlist);
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while (nsyms--) {
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nbuf = (NLIST *)(filep + cur_off);
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cur_off += sizeof(NLIST);
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if (!nbuf->_strx || nbuf->n_type&N_STAB)
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continue;
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key.data = (u_char *)strtab + nbuf->_strx - sizeof(long);
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key.size = strlen((char *)key.data);
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data.data = (u_char *)nbuf;
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data.size = sizeof(NLIST);
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if (db->put(db, &key, &data, 0))
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err(1, "record enter");
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if (1 && strcmp((char *)key.data, VRS_SYM) == 0) {
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#ifndef KERNTEXTOFF
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/*
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* XXX
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* The FreeBSD bootloader loads the kernel at the a_entry address, meaning
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* that this is where the kernel starts. (not at KERNBASE)
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*
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* This may be introducing an i386 dependency.
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*/
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#if defined(__FreeBSD__)
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#define KERNTEXTOFF ebuf->a_entry
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#else
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#define KERNTEXTOFF KERNBASE
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#endif
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#endif
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/*
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* Calculate offset relative to a normal (non-kernel)
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* a.out. KERNTEXTOFF is where the kernel is really
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* loaded; N_TXTADDR is where a normal file is loaded.
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* From there, locate file offset in text or data.
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*/
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voff = nbuf->n_value - KERNTEXTOFF + N_TXTADDR(*ebuf);
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if ((nbuf->n_type & N_TYPE) == N_TEXT)
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voff += N_TXTOFF(*ebuf) - N_TXTADDR(*ebuf);
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else
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voff += N_DATOFF(*ebuf) - N_DATADDR(*ebuf);
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vp = filep + voff;
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key.data = (u_char *)VRS_KEY;
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key.size = sizeof(VRS_KEY) - 1;
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data.data = vp;
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data.size = strchr(vp, '\n') - vp + 1;
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if (db->put(db, &key, &data, 0))
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err(1, "record enter");
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/* Restore to original values. */
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data.size = sizeof(NLIST);
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}
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}
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}
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