bfd/gen-aout.c

   1 /* Generate parameters for an a.out system.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 2001, 2002, 2005, 2007
   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "/usr/include/a.out.h"
  23 #include <stdio.h>
  24
  25 #ifndef _
  26 #define _(X) X
  27 #endif
  28
  29 int
  30 main (argc, argv)
  31      int argc; char** argv;
  32 {
  33   struct exec my_exec;
  34   int page_size;
  35   char *target = "unknown", *arch = "unknown";
  36   FILE *file = fopen("gen-aout", "r");
  37
  38   if (file == NULL) {
  39       fprintf(stderr, "Cannot open gen-aout!\n");
  40       return -1;
  41   }
  42   if (fread(&my_exec, sizeof(struct exec), 1, file) != 1) {
  43       fprintf(stderr, "Cannot read gen-aout!\n");
  44       return -1;
  45   }
  46
  47   target = argv[1];
  48   if (target == NULL) {
  49       fprintf(stderr, "Usage: gen-aout target_name\n");
  50       exit (1);
  51   }
  52
  53 #ifdef N_TXTOFF
  54   page_size = N_TXTOFF(my_exec);
  55   if (page_size == 0)
  56     printf("#define N_HEADER_IN_TEXT(x) 1\n");
  57   else
  58     printf("#define N_HEADER_IN_TEXT(x) 0\n");
  59 #endif
  60
  61   printf("#define BYTES_IN_WORD %d\n", sizeof (int));
  62   if (my_exec.a_entry == 0) {
  63       printf("#define ENTRY_CAN_BE_ZERO\n");
  64       printf("#define N_SHARED_LIB(x) 0 /* Avoids warning */\n");
  65   }
  66   else {
  67       printf("/*#define ENTRY_CAN_BE_ZERO*/\n");
  68       printf("/*#define N_SHARED_LIB(x) 0*/\n");
  69   }
  70
  71   printf("#define TEXT_START_ADDR %d\n", my_exec.a_entry);
  72
  73 #ifdef PAGSIZ
  74   if (page_size == 0)
  75     page_size = PAGSIZ;
  76 #endif
  77   if (page_size != 0)
  78     printf("#define TARGET_PAGE_SIZE %d\n", page_size);
  79   else
  80     printf("/* #define TARGET_PAGE_SIZE ??? */\n");
  81   printf("#define SEGMENT_SIZE TARGET_PAGE_SIZE\n");
  82
  83 #ifdef vax
  84   arch = "vax";
  85 #endif
  86 #ifdef m68k
  87   arch = "m68k";
  88 #endif
  89   if (arch[0] == '1')
  90     {
  91       fprintf (stderr, _("warning: preprocessor substituted architecture name inside string;"));
  92       fprintf (stderr, _("         fix DEFAULT_ARCH in the output file yourself\n"));
  93       arch = "unknown";
  94     }
  95   printf("#define DEFAULT_ARCH bfd_arch_%s\n\n", arch);
  96
  97   printf("/* Do not \"beautify\" the CONCAT* macro args.  Traditional C will not");
  98   printf("   remove whitespace added here, and thus will fail to concatenate");
  99   printf("   the tokens.  */");
 100   printf("\n#define MY(OP) CONCAT2 (%s_,OP)\n\n", target);
 101   printf("#define TARGETNAME \"a.out-%s\"\n\n", target);
 102
 103   printf("#include \"sysdep.h\"\n");
 104   printf("#include \"bfd.h\"\n");
 105   printf("#include \"libbfd.h\"\n");
 106   printf("#include \"libaout.h\"\n");
 107   printf("\n#include \"aout-target.h\"\n");
 108
 109   return 0;
 110 }