mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
359 lines
8.5 KiB
C
359 lines
8.5 KiB
C
/*
|
|
* Copyright (c) 1980 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#ifndef lint
|
|
char const copyright[] =
|
|
"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)symorder.c 5.8 (Berkeley) 4/1/91";
|
|
#endif
|
|
|
|
/*
|
|
* symorder - reorder symbol table
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <a.out.h>
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define SPACE 500
|
|
|
|
#define OKEXIT 0
|
|
#define NOTFOUNDEXIT 1
|
|
#define ERREXIT 2
|
|
|
|
char *exclude[SPACE];
|
|
struct nlist order[SPACE];
|
|
|
|
struct exec exec;
|
|
struct stat stb;
|
|
struct nlist *newtab, *symtab;
|
|
off_t sa;
|
|
int strtabsize, symfound, symkept, small, missing, clean;
|
|
char *kfile, *newstrings, *strings, asym[BUFSIZ];
|
|
size_t nsym, nexclude;
|
|
|
|
static void badfmt(const char *);
|
|
static int excluded(struct nlist *);
|
|
static int inlist(struct nlist *);
|
|
static void reorder(struct nlist *, struct nlist *, int);
|
|
static int savesymb(struct nlist *);
|
|
static void usage(void);
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct nlist *p, *symp;
|
|
FILE *f, *xfile;
|
|
int i;
|
|
char *start, *t, *xfilename;
|
|
int ch, n, o;
|
|
|
|
xfilename = NULL;
|
|
while ((ch = getopt(argc, argv, "cmtx:")) != -1)
|
|
switch(ch) {
|
|
case 'c':
|
|
clean = 1;
|
|
break;
|
|
case 'm':
|
|
missing = 1;
|
|
break;
|
|
case 't':
|
|
small = 1;
|
|
break;
|
|
case 'x':
|
|
if (xfilename != NULL)
|
|
usage();
|
|
xfilename = optarg;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc != 2)
|
|
usage();
|
|
|
|
if ((f = fopen(argv[0], "r")) == NULL)
|
|
err(ERREXIT, "%s", argv[0]);
|
|
|
|
for (p = order; fgets(asym, sizeof(asym), f) != NULL;) {
|
|
for (t = asym; isspace(*t); ++t);
|
|
if (!*(start = t))
|
|
continue;
|
|
while (*++t);
|
|
if (*--t == '\n')
|
|
*t = '\0';
|
|
p->n_un.n_name = strdup(start);
|
|
++p;
|
|
if (++nsym >= sizeof order / sizeof order[0])
|
|
break;
|
|
}
|
|
(void)fclose(f);
|
|
|
|
if (xfilename != NULL) {
|
|
if ((xfile = fopen(xfilename, "r")) == NULL)
|
|
err(ERREXIT, "%s", xfilename);
|
|
for (; fgets(asym, sizeof(asym), xfile) != NULL;) {
|
|
for (t = asym; isspace(*t); ++t);
|
|
if (!*(start = t))
|
|
continue;
|
|
while (*++t);
|
|
if (*--t == '\n')
|
|
*t = '\0';
|
|
exclude[nexclude] = strdup(start);
|
|
if (++nexclude >= sizeof exclude / sizeof exclude[0])
|
|
break;
|
|
}
|
|
(void)fclose(xfile);
|
|
}
|
|
|
|
kfile = argv[1];
|
|
if ((f = fopen(kfile, "r")) == NULL)
|
|
err(ERREXIT, "%s", kfile);
|
|
if ((o = open(kfile, O_WRONLY)) < 0)
|
|
err(ERREXIT, "%s", kfile);
|
|
|
|
/* read exec header */
|
|
if ((fread(&exec, sizeof(exec), 1, f)) != 1)
|
|
badfmt("no exec header");
|
|
if (N_BADMAG(exec))
|
|
badfmt("bad magic number");
|
|
if (exec.a_syms == 0)
|
|
badfmt("stripped");
|
|
(void)fstat(fileno(f), &stb);
|
|
if (stb.st_size < N_STROFF(exec) + sizeof(off_t))
|
|
badfmt("no string table");
|
|
|
|
/* seek to and read the symbol table */
|
|
sa = N_SYMOFF(exec);
|
|
(void)fseek(f, sa, SEEK_SET);
|
|
n = exec.a_syms;
|
|
if (!(symtab = (struct nlist *)malloc(n)))
|
|
err(ERREXIT, NULL);
|
|
if (fread((void *)symtab, 1, n, f) != (u_char)n)
|
|
badfmt("corrupted symbol table");
|
|
|
|
/* read string table size and string table */
|
|
if (fread((void *)&strtabsize, sizeof(int), 1, f) != 1 ||
|
|
strtabsize <= 0)
|
|
badfmt("corrupted string table");
|
|
strings = malloc(strtabsize);
|
|
if (strings == NULL)
|
|
err(ERREXIT, NULL);
|
|
/*
|
|
* Subtract four from strtabsize since strtabsize includes itself,
|
|
* and we've already read it.
|
|
*/
|
|
if (fread(strings, 1, strtabsize - sizeof(int), f) !=
|
|
strtabsize - sizeof(int))
|
|
badfmt("corrupted string table");
|
|
|
|
i = n / sizeof(struct nlist);
|
|
if (!clean) {
|
|
newtab = (struct nlist *)malloc(n);
|
|
if (newtab == (struct nlist *)NULL)
|
|
err(ERREXIT, NULL);
|
|
memset(newtab, 0, n);
|
|
|
|
reorder(symtab, newtab, i);
|
|
free((void *)symtab);
|
|
symtab = newtab;
|
|
} else {
|
|
symkept = i;
|
|
}
|
|
|
|
newstrings = malloc(strtabsize);
|
|
if (newstrings == NULL)
|
|
err(ERREXIT, NULL);
|
|
t = newstrings;
|
|
for (symp = symtab; --i >= 0; symp++) {
|
|
if (symp->n_un.n_strx == 0)
|
|
continue;
|
|
if (inlist(symp) < 0) {
|
|
if (small)
|
|
continue;
|
|
if (clean && !savesymb(symp))
|
|
symp->n_type &= ~N_EXT;
|
|
} else if (clean)
|
|
symfound++;
|
|
symp->n_un.n_strx -= sizeof(int);
|
|
(void)strcpy(t, &strings[symp->n_un.n_strx]);
|
|
symp->n_un.n_strx = (t - newstrings) + sizeof(int);
|
|
t += strlen(t) + 1;
|
|
}
|
|
|
|
/* update shrunk sizes */
|
|
strtabsize = t - newstrings + sizeof(int);
|
|
n = symkept * sizeof(struct nlist);
|
|
|
|
/* fix exec sym size */
|
|
(void)lseek(o, (off_t)0, SEEK_SET);
|
|
exec.a_syms = n;
|
|
if (write(o, (void *)&exec, sizeof(exec)) != sizeof(exec))
|
|
err(ERREXIT, "%s", kfile);
|
|
|
|
(void)lseek(o, sa, SEEK_SET);
|
|
if (write(o, (void *)symtab, n) != n)
|
|
err(ERREXIT, "%s", kfile);
|
|
if (write(o, (void *)&strtabsize, sizeof(int)) != sizeof(int))
|
|
err(ERREXIT, "%s", kfile);
|
|
if ((u_char)write(o, newstrings, strtabsize - sizeof(int)) !=
|
|
strtabsize - sizeof(int))
|
|
err(ERREXIT, "%s", kfile);
|
|
|
|
ftruncate(o, lseek(o, (off_t)0, SEEK_CUR));
|
|
|
|
if ((i = nsym - symfound) > 0) {
|
|
(void)printf("symorder: %d symbol%s not found:\n",
|
|
i, i == 1 ? "" : "s");
|
|
for (i = 0; i < (int)nsym; i++)
|
|
if (order[i].n_value == 0)
|
|
printf("%s\n", order[i].n_un.n_name);
|
|
if (!missing)
|
|
exit(NOTFOUNDEXIT);
|
|
}
|
|
exit(OKEXIT);
|
|
}
|
|
|
|
int
|
|
savesymb(s)
|
|
struct nlist *s;
|
|
{
|
|
if ((s->n_type & N_EXT) != N_EXT)
|
|
return 0;
|
|
switch (s->n_type & N_TYPE) {
|
|
case N_TEXT:
|
|
case N_DATA:
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
reorder(st1, st2, entries)
|
|
struct nlist *st1, *st2;
|
|
int entries;
|
|
{
|
|
struct nlist *p;
|
|
int i, n;
|
|
|
|
for (p = st1, n = entries; --n >= 0; ++p)
|
|
if (inlist(p) != -1)
|
|
++symfound;
|
|
for (p = st2 + symfound, n = entries; --n >= 0; ++st1) {
|
|
if (excluded(st1))
|
|
continue;
|
|
i = inlist(st1);
|
|
if (i == -1)
|
|
*p++ = *st1;
|
|
else
|
|
st2[i] = *st1;
|
|
++symkept;
|
|
}
|
|
}
|
|
|
|
int
|
|
inlist(p)
|
|
struct nlist *p;
|
|
{
|
|
char *nam;
|
|
struct nlist *op;
|
|
|
|
if (p->n_type & N_STAB || p->n_un.n_strx == 0)
|
|
return (-1);
|
|
if (p->n_un.n_strx < (int)sizeof(int) || p->n_un.n_strx >= strtabsize)
|
|
badfmt("corrupted symbol table");
|
|
nam = &strings[p->n_un.n_strx - sizeof(int)];
|
|
for (op = &order[nsym]; --op >= order; ) {
|
|
if (strcmp(op->n_un.n_name, nam) != 0)
|
|
continue;
|
|
op->n_value = 1;
|
|
return (op - order);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
int
|
|
excluded(p)
|
|
struct nlist *p;
|
|
{
|
|
char *nam;
|
|
int x;
|
|
|
|
if (p->n_type & N_STAB || p->n_un.n_strx == 0)
|
|
return (0);
|
|
if (p->n_un.n_strx < (int)sizeof(int) || p->n_un.n_strx >= strtabsize)
|
|
badfmt("corrupted symbol table");
|
|
nam = &strings[p->n_un.n_strx - sizeof(int)];
|
|
for (x = nexclude; --x >= 0; )
|
|
if (strcmp(nam, exclude[x]) == 0)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
badfmt(why)
|
|
const char *why;
|
|
{
|
|
errx(ERREXIT, "%s: %s: %s", kfile, why, strerror(EFTYPE));
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: symorder [-c] [-m] [-t] [-x excludelist] symlist file\n");
|
|
exit(ERREXIT);
|
|
}
|