diff options
Diffstat (limited to 'usr.sbin/kvm_mkdb/nlist.c')
| -rw-r--r-- | usr.sbin/kvm_mkdb/nlist.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/usr.sbin/kvm_mkdb/nlist.c b/usr.sbin/kvm_mkdb/nlist.c new file mode 100644 index 0000000..ad31a1a --- /dev/null +++ b/usr.sbin/kvm_mkdb/nlist.c @@ -0,0 +1,186 @@ +/*- + * 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. 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)nlist.c 8.1 (Berkeley) 6/6/93"; +#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" + +typedef struct nlist NLIST; +#define _strx n_un.n_strx +#define _name n_un.n_name + +#define badfmt(str) errx(1, "%s: %s: %s", kfile, str, strerror(EFTYPE)) + +static void badread __P((int, char *)); + +static char *kfile; + +void +create_knlist(name, db) + char *name; + DB *db; +{ + register int nsyms; + struct exec ebuf; + FILE *fp; + NLIST nbuf; + DBT data, key; + int fd, nr, strsize; + char *strtab, buf[1024]; + + kfile = name; + if ((fd = open(name, O_RDONLY, 0)) < 0) + err(1, "%s", name); + + /* Read in exec structure. */ + nr = read(fd, &ebuf, sizeof(struct exec)); + if (nr != sizeof(struct exec)) + badfmt("no exec header"); + + /* Check magic number and symbol count. */ + if (N_BADMAG(ebuf)) + badfmt("bad magic number"); + 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))) + err(1, NULL); + if ((nr = read(fd, strtab, strsize)) != strsize) + badread(nr, "corrupted symbol table"); + + /* Seek to symbol table. */ + if (!(fp = fdopen(fd, "r"))) + err(1, "%s", name); + if (fseek(fp, N_SYMOFF(ebuf), SEEK_SET) == -1) + err(1, "%s", name); + + data.data = (u_char *)&nbuf; + data.size = sizeof(NLIST); + + /* 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"); + err(1, "%s", name); + } + 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)) + err(1, "record enter"); + + if (strcmp((char *)key.data, VRS_SYM) == 0) { + long cur_off, voff; +#ifndef KERNTEXTOFF +#define KERNTEXTOFF KERNBASE +#endif + /* + * 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)) + err(1, "record enter"); + + /* 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); +} + +static void +badread(nr, p) + int nr; + char *p; +{ + if (nr < 0) + err(1, "%s", kfile); + badfmt(p); +} |
