| 1 | /*- |
| 2 | * Copyright (c) 2004, The DragonFly Project. All rights reserved. |
| 3 | * Copyright (c) 1998, Peter Wemm <peter@netplex.com.au> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 | * SUCH DAMAGE. |
| 26 | * |
| 27 | * $FreeBSD: src/usr.bin/objformat/objformat.c,v 1.6 1998/10/24 02:01:30 jdp Exp $ |
| 28 | */ |
| 29 | |
| 30 | #include <sys/param.h> |
| 31 | |
| 32 | #include <err.h> |
| 33 | #include <objformat.h> |
| 34 | #include <stdio.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <string.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | #ifndef CCVER_DEFAULT |
| 40 | #define CCVER_DEFAULT "gcc47" |
| 41 | #endif |
| 42 | |
| 43 | #ifndef BINUTILSVER_DEFAULT |
| 44 | #define BINUTILSVER_DEFAULT "binutils224" |
| 45 | #endif |
| 46 | |
| 47 | #define LINKER_DEFAULT "ld.bfd" |
| 48 | #define LINKER_GOLD "ld.gold" |
| 49 | |
| 50 | #ifndef OBJFORMAT_PATH_DEFAULT |
| 51 | #define OBJFORMAT_PATH_DEFAULT "" |
| 52 | #endif |
| 53 | |
| 54 | /* Macro for array size */ |
| 55 | #ifndef NELEM |
| 56 | #define NELEM(ary) (sizeof(ary) / sizeof((ary)[0])) |
| 57 | #endif |
| 58 | |
| 59 | enum cmd_type { OBJFORMAT, COMPILER, BINUTILS, LINKER }; |
| 60 | |
| 61 | struct command { |
| 62 | const char *cmd; |
| 63 | enum cmd_type type; |
| 64 | }; |
| 65 | |
| 66 | static struct command commands[] = { |
| 67 | {"CC", COMPILER}, |
| 68 | {"c++", COMPILER}, |
| 69 | {"cc", COMPILER}, |
| 70 | {"cpp", COMPILER}, |
| 71 | {"g++", COMPILER}, |
| 72 | {"gcc", COMPILER}, |
| 73 | {"gcov", COMPILER}, |
| 74 | {"ld", LINKER}, |
| 75 | {"addr2line", BINUTILS}, |
| 76 | {"ar", BINUTILS}, |
| 77 | {"as", BINUTILS}, |
| 78 | {"c++filt", BINUTILS}, |
| 79 | {"elfedit", BINUTILS}, |
| 80 | {"gprof", BINUTILS}, |
| 81 | {"nm", BINUTILS}, |
| 82 | {"objcopy", BINUTILS}, |
| 83 | {"objdump", BINUTILS}, |
| 84 | {"ranlib", BINUTILS}, |
| 85 | {"readelf", BINUTILS}, |
| 86 | {"size", BINUTILS}, |
| 87 | {"strings", BINUTILS}, |
| 88 | {"strip", BINUTILS}, |
| 89 | {"incremental-dump", BINUTILS}, |
| 90 | {"objformat", OBJFORMAT}, |
| 91 | {"", -1} |
| 92 | }; |
| 93 | |
| 94 | int |
| 95 | main(int argc, char **argv) |
| 96 | { |
| 97 | char ld_orig[] = LINKER_DEFAULT; |
| 98 | char ld_gold[] = LINKER_GOLD; |
| 99 | struct command *cmds; |
| 100 | char objformat[32]; |
| 101 | char *path, *chunk; |
| 102 | char *cmd, *newcmd = NULL; |
| 103 | char *ldcmd = ld_orig; |
| 104 | const char *objformat_path; |
| 105 | const char *ccver; |
| 106 | const char *buver; |
| 107 | const char *ldver; |
| 108 | const char *env_value = NULL; |
| 109 | const char *base_path = NULL; |
| 110 | int use_objformat = 0; |
| 111 | |
| 112 | if (getobjformat(objformat, sizeof objformat, &argc, argv) == -1) |
| 113 | errx(1, "Invalid object format"); |
| 114 | |
| 115 | /* |
| 116 | * Get the last path element of the program name being executed |
| 117 | */ |
| 118 | cmd = strrchr(argv[0], '/'); |
| 119 | if (cmd != NULL) |
| 120 | cmd++; |
| 121 | else |
| 122 | cmd = argv[0]; |
| 123 | |
| 124 | for (cmds = commands; cmds < &commands[NELEM(commands) - 1]; ++cmds) { |
| 125 | if (strcmp(cmd, cmds->cmd) == 0) |
| 126 | break; |
| 127 | } |
| 128 | |
| 129 | if (cmds) { |
| 130 | switch (cmds->type) { |
| 131 | case COMPILER: |
| 132 | ccver = getenv("CCVER"); |
| 133 | if ((ccver == NULL) || ccver[0] == 0) |
| 134 | ccver = CCVER_DEFAULT; |
| 135 | base_path = "/usr/libexec"; |
| 136 | use_objformat = 0; |
| 137 | env_value = ccver; |
| 138 | break; |
| 139 | case BINUTILS: |
| 140 | buver = getenv("BINUTILSVER"); |
| 141 | if (buver == NULL) |
| 142 | buver = BINUTILSVER_DEFAULT; |
| 143 | base_path = "/usr/libexec"; |
| 144 | use_objformat = 1; |
| 145 | env_value = buver; |
| 146 | break; |
| 147 | case LINKER: |
| 148 | buver = getenv("BINUTILSVER"); |
| 149 | if (buver == NULL) |
| 150 | buver = BINUTILSVER_DEFAULT; |
| 151 | ldver = getenv("LDVER"); |
| 152 | if ((ldver != NULL) && (strcmp(ldver, ld_gold) == 0)) |
| 153 | ldcmd = ld_gold; |
| 154 | base_path = "/usr/libexec"; |
| 155 | use_objformat = 1; |
| 156 | env_value = buver; |
| 157 | cmd = ldcmd; |
| 158 | break; |
| 159 | case OBJFORMAT: |
| 160 | break; |
| 161 | default: |
| 162 | errx(1, "unknown command type"); |
| 163 | break; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * The objformat command itself doesn't need another exec |
| 169 | */ |
| 170 | if (cmds->type == OBJFORMAT) { |
| 171 | if (argc != 1) { |
| 172 | fprintf(stderr, "Usage: objformat\n"); |
| 173 | exit(1); |
| 174 | } |
| 175 | |
| 176 | printf("%s\n", objformat); |
| 177 | exit(0); |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * make buildworld glue and CCVER overrides. |
| 182 | */ |
| 183 | objformat_path = getenv("OBJFORMAT_PATH"); |
| 184 | if (objformat_path == NULL) |
| 185 | objformat_path = OBJFORMAT_PATH_DEFAULT; |
| 186 | |
| 187 | again: |
| 188 | path = strdup(objformat_path); |
| 189 | |
| 190 | if (setenv("OBJFORMAT", objformat, 1) == -1) |
| 191 | err(1, "setenv: cannot set OBJFORMAT=%s", objformat); |
| 192 | |
| 193 | /* |
| 194 | * objformat_path could be sequence of colon-separated paths. |
| 195 | */ |
| 196 | while ((chunk = strsep(&path, ":")) != NULL) { |
| 197 | if (newcmd != NULL) { |
| 198 | free(newcmd); |
| 199 | newcmd = NULL; |
| 200 | } |
| 201 | if (use_objformat) { |
| 202 | asprintf(&newcmd, "%s%s/%s/%s/%s", |
| 203 | chunk, base_path, env_value, objformat, cmd); |
| 204 | } else { |
| 205 | asprintf(&newcmd, "%s%s/%s/%s", |
| 206 | chunk, base_path, env_value, cmd); |
| 207 | } |
| 208 | if (newcmd == NULL) |
| 209 | err(1, "cannot allocate memory"); |
| 210 | |
| 211 | argv[0] = newcmd; |
| 212 | execv(newcmd, argv); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Fallback: if we're searching for a compiler, but didn't |
| 217 | * find any, try again using the custom compiler driver. |
| 218 | */ |
| 219 | if (cmds && cmds->type == COMPILER && |
| 220 | strcmp(env_value, "custom") != 0) { |
| 221 | env_value = "custom"; |
| 222 | goto again; |
| 223 | } |
| 224 | |
| 225 | if (use_objformat) { |
| 226 | err(1, "in path [%s]%s/%s/%s/%s", |
| 227 | objformat_path, base_path, env_value, objformat, cmd); |
| 228 | } else { |
| 229 | err(1, "in path [%s]%s/%s/%s", |
| 230 | objformat_path, base_path, env_value, cmd); |
| 231 | } |
| 232 | } |