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1 /* Generate parameters for an a.out system.
2    Copyright (C) 1990-2014 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
main(int argc,char ** argv)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 #ifdef m68k
97   arch = "m68k";
98 #endif
99   if (arch[0] == '1')
100     {
101       fprintf (stderr, _("warning: preprocessor substituted architecture name inside string;"));
102       fprintf (stderr, _("         fix DEFAULT_ARCH in the output file yourself\n"));
103       arch = "unknown";
104     }
105   printf ("#define DEFAULT_ARCH bfd_arch_%s\n\n", arch);
106 
107   printf ("/* Do not \"beautify\" the CONCAT* macro args.  Traditional C will not");
108   printf ("   remove whitespace added here, and thus will fail to concatenate");
109   printf ("   the tokens.  */");
110   printf ("\n#define MY(OP) CONCAT2 (%s_,OP)\n\n", target);
111   printf ("#define TARGETNAME \"a.out-%s\"\n\n", target);
112 
113   printf ("#include \"sysdep.h\"\n");
114   printf ("#include \"bfd.h\"\n");
115   printf ("#include \"libbfd.h\"\n");
116   printf ("#include \"libaout.h\"\n");
117   printf ("\n#include \"aout-target.h\"\n");
118 
119   return 0;
120 }
121