bfd/gen-aout.c

   1 /* Generate parameters for an a.out system.
   2    Copyright (C) 1990, 91, 92, 93, 94, 98 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "/usr/include/a.out.h"
  21 #include <stdio.h>
  22
  23 int
  24 main (argc, argv)
  25      int argc; char** argv;
  26 {
  27   struct exec my_exec;
  28   int page_size;
  29   char *target = "unknown", *arch = "unknown";
  30   FILE *file = fopen("gen-aout", "r");
  31
  32   if (file == NULL) {
  33       fprintf(stderr, "Cannot open gen-aout!\n");
  34       return -1;
  35   }
  36   if (fread(&my_exec, sizeof(struct exec), 1, file) != 1) {
  37       fprintf(stderr, "Cannot read gen-aout!\n");
  38       return -1;
  39   }
  40
  41   target = argv[1];
  42   if (target == NULL) {
  43       fprintf(stderr, "Usage: gen-aout target_name\n");
  44       exit (1);
  45   }
  46
  47 #ifdef N_TXTOFF
  48   page_size = N_TXTOFF(my_exec);
  49   if (page_size == 0)
  50     printf("#define N_HEADER_IN_TEXT(x) 1\n");
  51   else
  52     printf("#define N_HEADER_IN_TEXT(x) 0\n");
  53 #endif
  54
  55   printf("#define BYTES_IN_WORD %d\n", sizeof (int));
  56   if (my_exec.a_entry == 0) {
  57       printf("#define ENTRY_CAN_BE_ZERO\n");
  58       printf("#define N_SHARED_LIB(x) 0 /* Avoids warning */\n");
  59   }
  60   else {
  61       printf("/*#define ENTRY_CAN_BE_ZERO*/\n");
  62       printf("/*#define N_SHARED_LIB(x) 0*/\n");
  63   }
  64
  65   printf("#define TEXT_START_ADDR %d\n", my_exec.a_entry);
  66
  67 #ifdef PAGSIZ
  68   if (page_size == 0)
  69     page_size = PAGSIZ;
  70 #endif
  71   if (page_size != 0)
  72     printf("#define TARGET_PAGE_SIZE %d\n", page_size);
  73   else
  74     printf("/* #define TARGET_PAGE_SIZE ??? */\n");
  75   printf("#define SEGMENT_SIZE TARGET_PAGE_SIZE\n");
  76
  77 #ifdef vax
  78   arch = "vax";
  79 #endif
  80 #ifdef m68k
  81   arch = "m68k";
  82 #endif
  83   if (arch[0] == '1')
  84     {
  85       fprintf (stderr, _("warning: preprocessor substituted architecture name inside string;"));
  86       fprintf (stderr, _("         fix DEFAULT_ARCH in the output file yourself\n"));
  87       arch = "unknown";
  88     }
  89   printf("#define DEFAULT_ARCH bfd_arch_%s\n", arch);
  90
  91   printf("\n#define MY(OP) CAT(%s_,OP)\n", target);
  92   printf("#define TARGETNAME \"a.out-%s\"\n\n", target);
  93
  94   printf("#include \"bfd.h\"\n");
  95   printf("#include \"sysdep.h\"\n");
  96   printf("#include \"libbfd.h\"\n");
  97   printf("#include \"libaout.h\"\n");
  98   printf("\n#include \"aout-target.h\"\n");
  99
 100   return 0;
 101 }