1.1 --- a/src/os/solaris/add_gnu_debuglink/add_gnu_debuglink.c Fri Nov 14 07:51:50 2014 -0800
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,285 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation.
1.11 - *
1.12 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 - * version 2 for more details (a copy is included in the LICENSE file that
1.16 - * accompanied this code).
1.17 - *
1.18 - * You should have received a copy of the GNU General Public License version
1.19 - * 2 along with this work; if not, write to the Free Software Foundation,
1.20 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 - *
1.22 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 - * or visit www.oracle.com if you need additional information or have any
1.24 - * questions.
1.25 - *
1.26 - */
1.27 -
1.28 -/*
1.29 - * Name: add_gnu_debuglink.c
1.30 - *
1.31 - * Description: Add a ".gnu_debuglink" section that refers to the specified
1.32 - * debug_info_path to the specified ELF object.
1.33 - *
1.34 - * This program is adapted from the example program shown on the
1.35 - * elf(3elf) man page and from code from the Solaris compiler
1.36 - * driver.
1.37 - */
1.38 -
1.39 -/*
1.40 - * needed to define SHF_EXCLUDE
1.41 - */
1.42 -#define ELF_TARGET_ALL
1.43 -
1.44 -#include <fcntl.h>
1.45 -#include <stdio.h>
1.46 -#include <libelf.h>
1.47 -#include <stdlib.h>
1.48 -#include <string.h>
1.49 -#include <unistd.h>
1.50 -
1.51 -static void failure(void);
1.52 -static unsigned int gnu_debuglink_crc32(unsigned int crc, unsigned char *buf,
1.53 - size_t len);
1.54 -
1.55 -void
1.56 -main(int argc, char ** argv) {
1.57 - /* new ELF section name */
1.58 - static char SEC_NAME[] = ".gnu_debuglink";
1.59 -
1.60 - unsigned char buffer[8 * 1024]; /* I/O buffer */
1.61 - int buffer_len; /* buffer length */
1.62 - char * debug_info_path; /* debug info path */
1.63 - void * ehdr; /* ELF header */
1.64 - Elf * elf; /* ELF descriptor */
1.65 - char * elf_ident; /* ELF identity string */
1.66 - char * elf_obj; /* elf_obj file */
1.67 - int fd; /* descriptor for files */
1.68 - unsigned int file_crc = 0; /* CRC for debug info file */
1.69 - int is_elfclass64; /* is an ELFCLASS64 file? */
1.70 - Elf_Data * link_dat; /* ELF data for new debug info link */
1.71 - Elf_Data * name_dat; /* ELF data for new section name */
1.72 - Elf_Scn * new_scn; /* new ELF section descriptor */
1.73 - void * new_shdr; /* new ELF section header */
1.74 - Elf_Scn * scn; /* ELF section descriptor */
1.75 - void * shdr; /* ELF section header */
1.76 -
1.77 - if (argc != 3) {
1.78 - (void) fprintf(stderr, "Usage: %s debug_info_path elf_obj\n", argv[0]);
1.79 - exit(2);
1.80 - }
1.81 -
1.82 - debug_info_path = argv[1]; /* save for later */
1.83 - if ((fd = open(debug_info_path, O_RDONLY)) == -1) {
1.84 - (void) fprintf(stderr, "%s: cannot open file.\n", debug_info_path);
1.85 - exit(3);
1.86 - }
1.87 -
1.88 - (void) printf("Computing CRC for '%s'\n", debug_info_path);
1.89 - (void) fflush(stdout);
1.90 - /* compute CRC for the debug info file */
1.91 - for (;;) {
1.92 - int len = read(fd, buffer, sizeof buffer);
1.93 - if (len <= 0) {
1.94 - break;
1.95 - }
1.96 - file_crc = gnu_debuglink_crc32(file_crc, buffer, len);
1.97 - }
1.98 - (void) close(fd);
1.99 -
1.100 - /* open the elf_obj */
1.101 - elf_obj = argv[2];
1.102 - if ((fd = open(elf_obj, O_RDWR)) == -1) {
1.103 - (void) fprintf(stderr, "%s: cannot open file.\n", elf_obj);
1.104 - exit(4);
1.105 - }
1.106 -
1.107 - (void) printf("Opening '%s' for update\n", elf_obj);
1.108 - (void) fflush(stdout);
1.109 - (void) elf_version(EV_CURRENT); /* coordinate ELF versions */
1.110 -
1.111 - /* obtain the ELF descriptors from the input file */
1.112 - if ((elf = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL) {
1.113 - failure();
1.114 - }
1.115 -
1.116 - /* determine if ELFCLASS64 or not? */
1.117 - elf_ident = elf_getident(elf, NULL);
1.118 - is_elfclass64 = (elf_ident[EI_CLASS] == ELFCLASS64);
1.119 -
1.120 - /* get the ELF header */
1.121 - if (is_elfclass64) {
1.122 - ehdr = elf64_getehdr(elf);
1.123 - } else {
1.124 - ehdr = elf32_getehdr(elf);
1.125 - }
1.126 - if (ehdr == NULL) {
1.127 - failure();
1.128 - }
1.129 -
1.130 - /* get the ELF section descriptor */
1.131 - if (is_elfclass64) {
1.132 - scn = elf_getscn(elf, ((Elf64_Ehdr *) ehdr)->e_shstrndx);
1.133 - } else {
1.134 - scn = elf_getscn(elf, ((Elf32_Ehdr *) ehdr)->e_shstrndx);
1.135 - }
1.136 - if (scn == NULL) {
1.137 - failure();
1.138 - }
1.139 -
1.140 - /* get the section header */
1.141 - if (is_elfclass64) {
1.142 - shdr = elf64_getshdr(scn);
1.143 - } else {
1.144 - shdr = elf32_getshdr(scn);
1.145 - }
1.146 - if (shdr == NULL) {
1.147 - failure();
1.148 - }
1.149 -
1.150 - (void) printf("Adding ELF data for new section name\n");
1.151 - (void) fflush(stdout);
1.152 - name_dat = elf_newdata(scn);
1.153 - name_dat->d_buf = (void *) SEC_NAME;
1.154 - if (is_elfclass64) {
1.155 - name_dat->d_off = ((Elf64_Shdr *) shdr)->sh_size + 1;
1.156 - } else {
1.157 - name_dat->d_off = ((Elf32_Shdr *) shdr)->sh_size + 1;
1.158 - }
1.159 - name_dat->d_align = 1;
1.160 - name_dat->d_size = strlen(SEC_NAME) + 1;
1.161 -
1.162 - new_scn = elf_newscn(elf);
1.163 -
1.164 - if (is_elfclass64) {
1.165 - new_shdr = elf64_getshdr(new_scn);
1.166 - ((Elf64_Shdr *) new_shdr)->sh_flags = SHF_EXCLUDE;
1.167 - ((Elf64_Shdr *) new_shdr)->sh_type = SHT_PROGBITS;
1.168 - ((Elf64_Shdr *) new_shdr)->sh_name = ((Elf64_Shdr *) shdr)->sh_size;
1.169 - ((Elf64_Shdr *) new_shdr)->sh_addralign = 1;
1.170 - ((Elf64_Shdr *) shdr)->sh_size += (strlen(SEC_NAME) + 1);
1.171 - } else {
1.172 - new_shdr = elf32_getshdr(new_scn);
1.173 - ((Elf32_Shdr *) new_shdr)->sh_flags = SHF_EXCLUDE;
1.174 - ((Elf32_Shdr *) new_shdr)->sh_type = SHT_PROGBITS;
1.175 - ((Elf32_Shdr *) new_shdr)->sh_name = ((Elf32_Shdr *) shdr)->sh_size;
1.176 - ((Elf32_Shdr *) new_shdr)->sh_addralign = 1;
1.177 - ((Elf32_Shdr *) shdr)->sh_size += (strlen(SEC_NAME) + 1);
1.178 - }
1.179 -
1.180 - (void) printf("Adding ELF data for debug_info_path value\n");
1.181 - (void) fflush(stdout);
1.182 - (void) memset(buffer, 0, sizeof buffer);
1.183 - buffer_len = strlen(debug_info_path) + 1; /* +1 for NUL */
1.184 - (void) strncpy((char *) buffer, debug_info_path, buffer_len);
1.185 - if (buffer_len % 4 != 0) {
1.186 - /* not on a 4 byte boundary so pad to the next one */
1.187 - buffer_len += (4 - buffer_len % 4);
1.188 - }
1.189 - /* save the CRC */
1.190 - (void) memcpy(&buffer[buffer_len], &file_crc, sizeof file_crc);
1.191 - buffer_len += sizeof file_crc;
1.192 -
1.193 - link_dat = elf_newdata(new_scn);
1.194 - link_dat->d_type = ELF_T_BYTE;
1.195 - link_dat->d_size = buffer_len;
1.196 - link_dat->d_buf = buffer;
1.197 - link_dat->d_align = 1;
1.198 -
1.199 - (void) printf("Saving updates to '%s'\n", elf_obj);
1.200 - (void) fflush(stdout);
1.201 - (void) elf_update(elf, ELF_C_NULL); /* recalc ELF memory structures */
1.202 - (void) elf_update(elf, ELF_C_WRITE); /* write out changes to ELF obj */
1.203 - (void) elf_end(elf); /* done with ELF obj */
1.204 - (void) close(fd);
1.205 -
1.206 - (void) printf("Done updating '%s'\n", elf_obj);
1.207 - (void) fflush(stdout);
1.208 - exit(0);
1.209 -} /* end main */
1.210 -
1.211 -
1.212 -static void
1.213 -failure() {
1.214 - (void) fprintf(stderr, "%s\n", elf_errmsg(elf_errno()));
1.215 - exit(5);
1.216 -}
1.217 -
1.218 -
1.219 -/*
1.220 - * The CRC used in gnu_debuglink, retrieved from
1.221 - * http://sourceware.org/gdb/current/onlinedocs/gdb/Separate-Debug-Files.html#Separate-Debug-Files.
1.222 - */
1.223 -
1.224 -static unsigned int
1.225 -gnu_debuglink_crc32(unsigned int crc, unsigned char *buf, size_t len) {
1.226 - static const unsigned int crc32_table[256] = {
1.227 - 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
1.228 - 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
1.229 - 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
1.230 - 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
1.231 - 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
1.232 - 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
1.233 - 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
1.234 - 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
1.235 - 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
1.236 - 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
1.237 - 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
1.238 - 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
1.239 - 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
1.240 - 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
1.241 - 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
1.242 - 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
1.243 - 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
1.244 - 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
1.245 - 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
1.246 - 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
1.247 - 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
1.248 - 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
1.249 - 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
1.250 - 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
1.251 - 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
1.252 - 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
1.253 - 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
1.254 - 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
1.255 - 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
1.256 - 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
1.257 - 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
1.258 - 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
1.259 - 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
1.260 - 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
1.261 - 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
1.262 - 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
1.263 - 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
1.264 - 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
1.265 - 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
1.266 - 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
1.267 - 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
1.268 - 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
1.269 - 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
1.270 - 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
1.271 - 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
1.272 - 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
1.273 - 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
1.274 - 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
1.275 - 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
1.276 - 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
1.277 - 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
1.278 - 0x2d02ef8d
1.279 - };
1.280 -
1.281 - unsigned char *end;
1.282 -
1.283 - crc = ~crc & 0xffffffff;
1.284 - for (end = buf + len; buf < end; ++buf) {
1.285 - crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
1.286 - }
1.287 - return ~crc & 0xffffffff;
1.288 -}
