2 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/param.h>
30 #include <sys/resident.h>
31 #include <sys/sysctl.h>
33 #include <machine/elf.h>
47 fprintf(stderr, "usage: resident [-l] [-f] [-x id] [-d] [-R] program ...\n");
54 const char *mib = "vm.resident";
55 struct xresident *buf;
56 size_t res_count, res_total, i;
59 /* get the number of resident binaries */
60 error = sysctlbyname(mib, NULL, &res_count, NULL, 0);
62 perror("sysctl: vm.resident");
67 printf("no resident binaries to list\n");
71 /* allocate memory for the list of binaries */
72 res_total = sizeof(*buf) * res_count;
73 if ((buf = malloc(res_total)) != NULL) {
74 /* retrieve entries via sysctl */
75 error = sysctlbyname(mib, buf, &res_total, NULL, 0);
77 perror("sysctl: vm.resident");
85 /* print the list of retrieved resident binary */
86 printf("%-4s\t%-15s\t%-12s\t%-30s\n","Id", "Size", "Address", "Executable");
87 for (i = 0; i < res_count; ++i) {
88 printf("%-4d\t%-15jd\t0x%-12x\t%-30s\n",
90 (intmax_t)buf[i].res_stat.st_size,
91 (int)buf[i].res_entry_addr,
95 /* free back the memory */
103 main(int argc, char *argv[])
110 while ((c = getopt(argc, argv, "Rdflx:")) != -1) {
116 rval = list_residents();
127 c = exec_sys_unregister(-2);
129 c = exec_sys_unregister(strtol(optarg, NULL, 0));
131 printf("unregister: %s\n", strerror(errno));
133 printf("unregister: success\n");
148 /* ld-elf.so magic */
150 if (setenv("LD_RESIDENT_REGISTER_NOW", "yes", 1) == -1)
151 err(1, "setenv failed");
153 if (setenv("LD_RESIDENT_UNREGISTER_NOW", "yes", 1) == -1)
154 err(1, "setenv failed");
158 for ( ; argc > 0; argc--, argv++) {
172 if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
177 if ((n = read(fd, &hdr, sizeof hdr)) == -1) {
178 warn("%s: can't read program header", *argv);
186 if ((size_t)n >= sizeof hdr.aout && !N_BADMAG(hdr.aout)) {
188 if ((N_GETFLAG(hdr.aout) & EX_DPMASK) != EX_DYNAMIC
189 #if 1 /* Compatibility */
190 || hdr.aout.a_entry < __LDPGSZ
193 warnx("%s: not a dynamic executable", *argv);
196 } else if ((size_t)n >= sizeof hdr.elf && IS_ELF(hdr.elf)) {
201 if (lseek(fd, 0, SEEK_SET) == -1 ||
202 read(fd, &ehdr, sizeof ehdr) != sizeof ehdr ||
203 lseek(fd, ehdr.e_phoff, SEEK_SET) == -1
205 warnx("%s: can't read program header", *argv);
208 for (i = 0; i < ehdr.e_phnum; i++) {
209 if (read(fd, &phdr, ehdr.e_phentsize)
211 warnx("%s: can't read program header",
216 if (phdr.p_type == PT_DYNAMIC)
221 warnx("%s: not a dynamic executable", *argv);
223 } else if (hdr.elf.e_type == ET_DYN) {
224 if (hdr.elf.e_ident[EI_OSABI] & ELFOSABI_FREEBSD) {
227 warnx("%s: not a FreeBSD ELF shared "
233 warnx("%s: not a dynamic executable", *argv);
244 warnx("%s: resident not supported on shared libraries.", *argv);
256 if (wait(&status) <= 0) {
259 } else if (WIFSIGNALED(status)) {
260 fprintf(stderr, "%s: signal %d\n",
261 *argv, WTERMSIG(status));
263 } else if (WIFEXITED(status) && WEXITSTATUS(status)) {
264 switch(WEXITSTATUS(status)) {
266 fprintf(stderr, "%s: entry not found\n",
270 fprintf(stderr, "%s: binary already resident\n",
274 fprintf(stderr, "%s: exit status %s\n",
275 *argv, strerror(WEXITSTATUS(status)));
282 execl(*argv, *argv, NULL);