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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Set bits in the DT_FLAGS_1 member of the .dynamic section of an object.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <libelf.h>
#include <gelf.h>
#include <string.h>
#include <fcntl.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/link.h>
#include <util.h>
/*
* These are here because we can't be sure (yet) that the build machine has a
* sys/link.h that includes the following #defines. This tool will be executed
* on the build machine, so we have to use its headers (rather than the ones
* in $ROOT which will, by definition, be up to date). These #defines can be
* removed when we're sure that all build machines have recent copies of
* sys/link.h.
*/
#ifndef DF_1_IGNMULDEF
#define DF_1_IGNMULDEF 0x00040000
#endif
#ifndef DF_1_NOKSYMS
#define DF_1_NOKSYMS 0x00080000
#endif
struct dtflagval {
char *fv_name;
ulong_t fv_val;
};
static struct dtflagval dtflagvals[] = {
{ "DF_1_IGNMULDEF", DF_1_IGNMULDEF },
{ "DF_1_NOKSYMS", DF_1_NOKSYMS },
{ NULL }
};
const char *progname;
static void
usage(void)
{
(void) fprintf(stderr, "Usage: %s -f flag_val file\n", progname);
exit(2);
}
static void
set_flag(char *ifile, ulong_t flval)
{
Elf *elf;
Elf_Scn *scn;
Elf_Data *data;
GElf_Shdr shdr;
GElf_Dyn dyn;
int fd, secidx, nent, i;
(void) elf_version(EV_CURRENT);
if ((fd = open(ifile, O_RDWR)) < 0)
die("Can't open %s", ifile);
if ((elf = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL)
elfdie("Can't start ELF for %s", ifile);
if ((secidx = findelfsecidx(elf, ".dynamic")) == -1)
die("Can't find .dynamic section in %s\n", ifile);
if ((scn = elf_getscn(elf, secidx)) == NULL)
elfdie("elf_getscn (%d)", secidx);
if (gelf_getshdr(scn, &shdr) == NULL)
elfdie("gelf_shdr");
if ((data = elf_getdata(scn, NULL)) == NULL)
elfdie("elf_getdata");
nent = shdr.sh_size / shdr.sh_entsize;
for (i = 0; i < nent; i++) {
if (gelf_getdyn(data, i, &dyn) == NULL)
elfdie("gelf_getdyn");
if (dyn.d_tag == DT_FLAGS_1) {
dyn.d_un.d_val |= (Elf64_Xword)flval;
if (gelf_update_dyn(data, i, &dyn) == 0)
elfdie("gelf_update_dyn");
break;
}
}
if (i == nent) {
die("%s's .dynamic section doesn't have a DT_FLAGS_1 "
"field\n", ifile);
}
if (elf_update(elf, ELF_C_WRITE) == -1)
elfdie("Couldn't update %s with changes", ifile);
(void) elf_end(elf);
(void) close(fd);
}
static ulong_t
parse_flag(char *optarg)
{
ulong_t flval = 0L;
char *arg;
int i;
for (arg = strtok(optarg, ","); arg != NULL; arg = strtok(NULL, ",")) {
for (i = 0; dtflagvals[i].fv_name != NULL; i++) {
if (strcmp(dtflagvals[i].fv_name, arg) == 0)
flval |= dtflagvals[i].fv_val;
}
}
return (flval);
}
int
main(int argc, char **argv)
{
ulong_t flval = 0L;
int c;
progname = basename(argv[0]);
while ((c = getopt(argc, argv, "f:")) != EOF) {
switch (c) {
case 'f':
if ((flval = strtoul(optarg, NULL, 0)) == 0 &&
(flval = parse_flag(optarg)) == 0)
usage();
break;
default:
usage();
}
}
if (flval == 0 || argc - optind != 1)
usage();
set_flag(argv[optind], flval);
return (0);
}
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