bfd/gen-aout.c

   1 /* Generate parameters for an a.out system.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 2001
   3    Free Software Foundation, Inc.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "/usr/include/a.out.h"
  22 #include <stdio.h>
  23
  24 #ifndef _
  25 #define _(X) X
  26 #endif
  27
  28 int
  29 main (argc, argv)
  30      int argc; char** argv;
  31 {
  32   struct exec my_exec;
  33   int page_size;
  34   char *target = "unknown", *arch = "unknown";
  35   FILE *file = fopen("gen-aout", "r");
  36
  37   if (file == NULL) {
  38       fprintf(stderr, "Cannot open gen-aout!\n");
  39       return -1;
  40   }
  41   if (fread(&my_exec, sizeof(struct exec), 1, file) != 1) {
  42       fprintf(stderr, "Cannot read gen-aout!\n");
  43       return -1;
  44   }
  45
  46   target = argv[1];
  47   if (target == NULL) {
  48       fprintf(stderr, "Usage: gen-aout target_name\n");
  49       exit (1);
  50   }
  51
  52 #ifdef N_TXTOFF
  53   page_size = N_TXTOFF(my_exec);
  54   if (page_size == 0)
  55     printf("#define N_HEADER_IN_TEXT(x) 1\n");
  56   else
  57     printf("#define N_HEADER_IN_TEXT(x) 0\n");
  58 #endif
  59
  60   printf("#define BYTES_IN_WORD %d\n", sizeof (int));
  61   if (my_exec.a_entry == 0) {
  62       printf("#define ENTRY_CAN_BE_ZERO\n");
  63       printf("#define N_SHARED_LIB(x) 0 /* Avoids warning */\n");
  64   }
  65   else {
  66       printf("/*#define ENTRY_CAN_BE_ZERO*/\n");
  67       printf("/*#define N_SHARED_LIB(x) 0*/\n");
  68   }
  69
  70   printf("#define TEXT_START_ADDR %d\n", my_exec.a_entry);
  71
  72 #ifdef PAGSIZ
  73   if (page_size == 0)
  74     page_size = PAGSIZ;
  75 #endif
  76   if (page_size != 0)
  77     printf("#define TARGET_PAGE_SIZE %d\n", page_size);
  78   else
  79     printf("/* #define TARGET_PAGE_SIZE ??? */\n");
  80   printf("#define SEGMENT_SIZE TARGET_PAGE_SIZE\n");
  81
  82 #ifdef vax
  83   arch = "vax";
  84 #endif
  85 #ifdef m68k
  86   arch = "m68k";
  87 #endif
  88   if (arch[0] == '1')
  89     {
  90       fprintf (stderr, _("warning: preprocessor substituted architecture name inside string;"));
  91       fprintf (stderr, _("         fix DEFAULT_ARCH in the output file yourself\n"));
  92       arch = "unknown";
  93     }
  94   printf("#define DEFAULT_ARCH bfd_arch_%s\n\n", arch);
  95
  96   printf("/* Do not \"beautify\" the CONCAT* macro args.  Traditional C will not");
  97   printf("   remove whitespace added here, and thus will fail to concatenate");
  98   printf("   the tokens.  */");
  99   printf("\n#define MY(OP) CONCAT2 (%s_,OP)\n\n", target);
 100   printf("#define TARGETNAME \"a.out-%s\"\n\n", target);
 101
 102   printf("#include \"bfd.h\"\n");
 103   printf("#include \"sysdep.h\"\n");
 104   printf("#include \"libbfd.h\"\n");
 105   printf("#include \"libaout.h\"\n");
 106   printf("\n#include \"aout-target.h\"\n");
 107
 108   return 0;
 109 }