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 "binutils225"
  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         {"nm",                  BINUTILS},
  84         {"objcopy",             BINUTILS},
  85         {"objdump",             BINUTILS},
  86         {"ranlib",              BINUTILS},
  87         {"readelf",             BINUTILS},
  88         {"size",                BINUTILS},
  89         {"strings",             BINUTILS},
  90         {"strip",               BINUTILS},
  91         {"incremental-dump",    BINUTILS},
  92         {"objformat",           OBJFORMAT},
  93         {"",                    -1}
  94 };
  95
  96 int
  97 main(int argc, char **argv)
  98 {
  99         char ld_def[] = LINKER_DEFAULT;
 100         char ld_alt[] = LINKER_ALT;
 101         struct command *cmds;
 102         char objformat[32];
 103         char *path, *chunk;
 104         char *cmd, *newcmd = NULL;
 105         char *ldcmd = ld_def;
 106         const char *objformat_path;
 107         const char *ccver;
 108         const char *buver;
 109         const char *ldver;
 110         const char *env_value = NULL;
 111         const char *base_path = NULL;
 112         int use_objformat = 0;
 113
 114         if (getobjformat(objformat, sizeof objformat, &argc, argv) == -1)
 115                 errx(1, "Invalid object format");
 116
 117         /*
 118          * Get the last path element of the program name being executed
 119          */
 120         cmd = strrchr(argv[0], '/');
 121         if (cmd != NULL)
 122                 cmd++;
 123         else
 124                 cmd = argv[0];
 125
 126         for (cmds = commands; cmds < &commands[NELEM(commands) - 1]; ++cmds) {
 127                 if (strcmp(cmd, cmds->cmd) == 0)
 128                         break;
 129         }
 130
 131         if (cmds) {
 132                 switch (cmds->type) {
 133                 case COMPILER:
 134                         ccver = getenv("CCVER");
 135                         if ((ccver == NULL) || ccver[0] == 0)
 136                             ccver = CCVER_DEFAULT;
 137                         base_path = "/usr/libexec";
 138                         use_objformat = 0;
 139                         env_value = ccver;
 140                         break;
 141                 case BINUTILS:
 142                         buver = getenv("BINUTILSVER");
 143                         if (buver == NULL)
 144                             buver = BINUTILSVER_DEFAULT;
 145                         base_path = "/usr/libexec";
 146                         use_objformat = 1;
 147                         env_value = buver;
 148                         break;
 149                 case LINKER:
 150                         buver = getenv("BINUTILSVER");
 151                         if (buver == NULL)
 152                             buver = BINUTILSVER_DEFAULT;
 153                         ldver = getenv("LDVER");
 154                         if ((ldver != NULL) && (strcmp(ldver, ld_alt) == 0))
 155                             ldcmd = ld_alt;
 156                         base_path = "/usr/libexec";
 157                         use_objformat = 1;
 158                         env_value = buver;
 159                         cmd = ldcmd;
 160                         break;
 161                 case OBJFORMAT:
 162                         break;
 163                 default:
 164                         errx(1, "unknown command type");
 165                         break;
 166                 }
 167         }
 168
 169         /*
 170          * The objformat command itself doesn't need another exec
 171          */
 172         if (cmds->type == OBJFORMAT) {
 173                 if (argc != 1) {
 174                         fprintf(stderr, "Usage: objformat\n");
 175                         exit(1);
 176                 }
 177
 178                 printf("%s\n", objformat);
 179                 exit(0);
 180         }
 181
 182         /*
 183          * make buildworld glue and CCVER overrides.
 184          */
 185         /*
 186          * CCVER=clang check temporary; only for base clang import work
 187          */
 188         if (cmds && cmds->type == COMPILER &&
 189             strcmp (env_value, "clang") == 0) {
 190                 objformat_path = "";
 191         } else {
 192                 objformat_path = getenv("OBJFORMAT_PATH");
 193                 if (objformat_path == NULL)
 194                         objformat_path = OBJFORMAT_PATH_DEFAULT;
 195         }
 196
 197 again:
 198         path = strdup(objformat_path);
 199
 200         if (setenv("OBJFORMAT", objformat, 1) == -1)
 201                 err(1, "setenv: cannot set OBJFORMAT=%s", objformat);
 202
 203         /*
 204          * objformat_path could be sequence of colon-separated paths.
 205          */
 206         while ((chunk = strsep(&path, ":")) != NULL) {
 207                 if (newcmd != NULL) {
 208                         free(newcmd);
 209                         newcmd = NULL;
 210                 }
 211                 if (use_objformat) {
 212                         asprintf(&newcmd, "%s%s/%s/%s/%s",
 213                                 chunk, base_path, env_value, objformat, cmd);
 214                 } else {
 215                         asprintf(&newcmd, "%s%s/%s/%s",
 216                                 chunk, base_path, env_value, cmd);
 217                 }
 218                 if (newcmd == NULL)
 219                         err(1, "cannot allocate memory");
 220
 221                 argv[0] = newcmd;
 222                 execv(newcmd, argv);
 223         }
 224
 225         /*
 226          * Fallback:  if we're searching for a compiler, but didn't
 227          * find any, try again using the custom compiler driver.
 228          */
 229         if (cmds && cmds->type == COMPILER &&
 230             strcmp(env_value, "custom") != 0) {
 231                 env_value = "custom";
 232                 goto again;
 233         }
 234
 235         if (use_objformat) {
 236                 err(1, "in path [%s]%s/%s/%s/%s",
 237                         objformat_path, base_path, env_value, objformat, cmd);
 238         } else {
 239                 err(1, "in path [%s]%s/%s/%s",
 240                         objformat_path, base_path, env_value, cmd);
 241         }
 242 }