usr.bin/objformat/objformat.c

   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 "gcc50"
  41 #endif
  42
  43 #ifndef BINUTILSVER_DEFAULT
  44 #define BINUTILSVER_DEFAULT "binutils227"
  45 #endif
  46
  47 #define LINKER_BFD     "ld.bfd"
  48 #define LINKER_GOLD    "ld.gold"
  49 #define LINKER_DEFAULT LINKER_GOLD
  50 #define LINKER_ALT     LINKER_BFD
  51
  52 #ifndef OBJFORMAT_PATH_DEFAULT
  53 #define OBJFORMAT_PATH_DEFAULT ""
  54 #endif
  55
  56 /* Macro for array size */
  57 #ifndef NELEM
  58 #define NELEM(ary)      (sizeof(ary) / sizeof((ary)[0]))
  59 #endif
  60
  61 enum cmd_type { OBJFORMAT, COMPILER, BINUTILS, LINKER };
  62
  63 struct command {
  64         const char *cmd;
  65         enum cmd_type type;
  66 };
  67
  68 static struct command commands[] = {
  69         {"CC",                  COMPILER},
  70         {"c++",                 COMPILER},
  71         {"cc",                  COMPILER},
  72         {"cpp",                 COMPILER},
  73         {"g++",                 COMPILER},
  74         {"gcc",                 COMPILER},
  75         {"gcov",                COMPILER},
  76         {"ld",                  LINKER},
  77         {"addr2line",           BINUTILS},
  78         {"ar",                  BINUTILS},
  79         {"as",                  BINUTILS},
  80         {"c++filt",             BINUTILS},
  81         {"elfedit",             BINUTILS},
  82         {"gprof",               BINUTILS},
  83         {"ld.bfd",              BINUTILS},
  84         {"ld.gold",             BINUTILS},
  85         {"nm",                  BINUTILS},
  86         {"objcopy",             BINUTILS},
  87         {"objdump",             BINUTILS},
  88         {"ranlib",              BINUTILS},
  89         {"readelf",             BINUTILS},
  90         {"size",                BINUTILS},
  91         {"strings",             BINUTILS},
  92         {"strip",               BINUTILS},
  93         {"incremental-dump",    BINUTILS},
  94         {"objformat",           OBJFORMAT},
  95         {"",                    -1}
  96 };
  97
  98 int
  99 main(int argc, char **argv)
 100 {
 101         char ld_def[] = LINKER_DEFAULT;
 102         char ld_alt[] = LINKER_ALT;
 103         struct command *cmds;
 104         char objformat[32];
 105         char *path, *chunk;
 106         char *cmd, *newcmd = NULL;
 107         char *ldcmd = ld_def;
 108         const char *objformat_path;
 109         const char *ccver;
 110         const char *buver;
 111         const char *ldver;
 112         const char *env_value = NULL;
 113         const char *base_path = NULL;
 114         int use_objformat = 0;
 115
 116         if (getobjformat(objformat, sizeof objformat, &argc, argv) == -1)
 117                 errx(1, "Invalid object format");
 118
 119         /*
 120          * Get the last path element of the program name being executed
 121          */
 122         cmd = strrchr(argv[0], '/');
 123         if (cmd != NULL)
 124                 cmd++;
 125         else
 126                 cmd = argv[0];
 127
 128         for (cmds = commands; cmds < &commands[NELEM(commands) - 1]; ++cmds) {
 129                 if (strcmp(cmd, cmds->cmd) == 0)
 130                         break;
 131         }
 132
 133         if (cmds) {
 134                 switch (cmds->type) {
 135                 case COMPILER:
 136                         ccver = getenv("CCVER");
 137                         if ((ccver == NULL) || ccver[0] == 0)
 138                             ccver = CCVER_DEFAULT;
 139                         base_path = "/usr/libexec";
 140                         use_objformat = 0;
 141                         env_value = ccver;
 142                         break;
 143                 case BINUTILS:
 144                         buver = getenv("BINUTILSVER");
 145                         if (buver == NULL)
 146                             buver = BINUTILSVER_DEFAULT;
 147                         base_path = "/usr/libexec";
 148                         use_objformat = 1;
 149                         env_value = buver;
 150                         break;
 151                 case LINKER:
 152                         buver = getenv("BINUTILSVER");
 153                         if (buver == NULL)
 154                             buver = BINUTILSVER_DEFAULT;
 155                         ldver = getenv("LDVER");
 156                         if ((ldver != NULL) && (strcmp(ldver, ld_alt) == 0))
 157                             ldcmd = ld_alt;
 158                         base_path = "/usr/libexec";
 159                         use_objformat = 1;
 160                         env_value = buver;
 161                         cmd = ldcmd;
 162                         break;
 163                 case OBJFORMAT:
 164                         break;
 165                 default:
 166                         errx(1, "unknown command type");
 167                         break;
 168                 }
 169         }
 170
 171         /*
 172          * The objformat command itself doesn't need another exec
 173          */
 174         if (cmds->type == OBJFORMAT) {
 175                 if (argc != 1) {
 176                         fprintf(stderr, "Usage: objformat\n");
 177                         exit(1);
 178                 }
 179
 180                 printf("%s\n", objformat);
 181                 exit(0);
 182         }
 183
 184         /*
 185          * make buildworld glue and CCVER overrides.
 186          */
 187         /*
 188          * CCVER=clang check temporary; only for base clang import work
 189          */
 190         if (cmds && cmds->type == COMPILER &&
 191             strcmp (env_value, "clang") == 0) {
 192                 objformat_path = "";
 193         } else {
 194                 objformat_path = getenv("OBJFORMAT_PATH");
 195                 if (objformat_path == NULL)
 196                         objformat_path = OBJFORMAT_PATH_DEFAULT;
 197         }
 198
 199 again:
 200         path = strdup(objformat_path);
 201
 202         if (setenv("OBJFORMAT", objformat, 1) == -1)
 203                 err(1, "setenv: cannot set OBJFORMAT=%s", objformat);
 204
 205         /*
 206          * objformat_path could be sequence of colon-separated paths.
 207          */
 208         while ((chunk = strsep(&path, ":")) != NULL) {
 209                 if (newcmd != NULL) {
 210                         free(newcmd);
 211                         newcmd = NULL;
 212                 }
 213                 if (use_objformat) {
 214                         asprintf(&newcmd, "%s%s/%s/%s/%s",
 215                                 chunk, base_path, env_value, objformat, cmd);
 216                 } else {
 217                         asprintf(&newcmd, "%s%s/%s/%s",
 218                                 chunk, base_path, env_value, cmd);
 219                 }
 220                 if (newcmd == NULL)
 221                         err(1, "cannot allocate memory");
 222
 223                 argv[0] = newcmd;
 224                 execv(newcmd, argv);
 225         }
 226
 227         /*
 228          * Fallback:  if we're searching for a compiler, but didn't
 229          * find any, try again using the custom compiler driver.
 230          */
 231         if (cmds && cmds->type == COMPILER &&
 232             strcmp(env_value, "custom") != 0) {
 233                 env_value = "custom";
 234                 goto again;
 235         }
 236
 237         if (use_objformat) {
 238                 err(1, "in path [%s]%s/%s/%s/%s",
 239                         objformat_path, base_path, env_value, objformat, cmd);
 240         } else {
 241                 err(1, "in path [%s]%s/%s/%s",
 242                         objformat_path, base_path, env_value, cmd);
 243         }
 244 }