1  /* Generate parameters for an a.out system.
       2     Copyright (C) 1990-2023 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
      19     MA 02110-1301, 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 (int argc, char** argv)
      30  {
      31    struct exec my_exec;
      32    int page_size;
      33    char * target;
      34    char * arch = "unknown";
      35    FILE * file;
      36  
      37    target = argv[1];
      38    if (target == NULL)
      39      {
      40        fprintf (stderr, "Usage: gen-aout target_name\n");
      41        exit (1);
      42      }
      43  
      44    file = fopen ("gen-aout", "r");
      45    if (file == NULL)
      46      {
      47        fprintf (stderr, "Cannot open gen-aout!\n");
      48        return -1;
      49      }
      50  
      51    if (fread (&my_exec, sizeof (struct exec), 1, file) != 1)
      52      {
      53        fprintf(stderr, "Cannot read gen-aout!\n");
      54        return -1;
      55      }
      56  
      57    fclose (file);
      58  
      59  #ifdef N_TXTOFF
      60    page_size = N_TXTOFF (&my_exec);
      61    if (page_size == 0)
      62      printf ("#define N_HEADER_IN_TEXT(x) 1\n");
      63    else
      64      printf ("#define N_HEADER_IN_TEXT(x) 0\n");
      65  #endif
      66  
      67    printf("#define BYTES_IN_WORD %d\n", sizeof (int));
      68    if (my_exec.a_entry == 0)
      69      {
      70        printf ("#define ENTRY_CAN_BE_ZERO\n");
      71        printf ("#define N_SHARED_LIB(x) 0 /* Avoids warning */\n");
      72      }
      73    else
      74      {
      75        printf ("/*#define ENTRY_CAN_BE_ZERO*/\n");
      76        printf ("/*#define N_SHARED_LIB(x) 0*/\n");
      77      }
      78  
      79    printf ("#define TEXT_START_ADDR %d\n", my_exec.a_entry);
      80  
      81  #ifdef PAGSIZ
      82    if (page_size == 0)
      83      page_size = PAGSIZ;
      84  #endif
      85  
      86    if (page_size != 0)
      87      printf ("#define TARGET_PAGE_SIZE %d\n", page_size);
      88    else
      89      printf ("/* #define TARGET_PAGE_SIZE ??? */\n");
      90  
      91    printf ("#define SEGMENT_SIZE TARGET_PAGE_SIZE\n");
      92  
      93  #ifdef vax
      94    arch = "vax";
      95  #endif
      96    if (arch[0] == '1')
      97      {
      98        fprintf (stderr, _("warning: preprocessor substituted architecture name inside string;"));
      99        fprintf (stderr, _("         fix DEFAULT_ARCH in the output file yourself\n"));
     100        arch = "unknown";
     101      }
     102    printf ("#define DEFAULT_ARCH bfd_arch_%s\n\n", arch);
     103  
     104    printf ("/* Do not \"beautify\" the CONCAT* macro args.  Traditional C will not");
     105    printf ("   remove whitespace added here, and thus will fail to concatenate");
     106    printf ("   the tokens.  */");
     107    printf ("\n#define MY(OP) CONCAT2 (%s_,OP)\n\n", target);
     108    printf ("#define TARGETNAME \"a.out-%s\"\n\n", target);
     109  
     110    printf ("#include \"sysdep.h\"\n");
     111    printf ("#include \"bfd.h\"\n");
     112    printf ("#include \"libbfd.h\"\n");
     113    printf ("#include \"libaout.h\"\n");
     114    printf ("\n#include \"aout-target.h\"\n");
     115  
     116    return 0;
     117  }