bfd/i386aout.c

   1 /* BFD back-end for i386 a.out binaries.
   2    Copyright 1990, 1991, 1992, 1994, 1996, 1997
   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
  22 /* The only 386 aout system we have here is GO32 from DJ.
  23    These numbers make BFD work with that. If your aout 386 system
  24    doesn't work with these, we'll have to split them into different
  25    files.  Send me (sac@cygnus.com) the runes to make it work on your
  26    system, and I'll stick it in for the next release.  */
  27
  28 #define N_HEADER_IN_TEXT(x) 0
  29 #define BYTES_IN_WORD 4
  30
  31 #define N_TXTOFF(x) 0x20
  32 #define N_TXTADDR(x) (N_MAGIC(x)==ZMAGIC ? 0x1020 : 0)
  33
  34 #define N_TXTSIZE(x) ((x).a_text)
  35 #if 0
  36 #define N_DATADDR(x) (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) : (SEGMENT_SIZE + ((0x1020+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
  37 #define NOSUBEXECB
  38
  39 #endif
  40 #define TARGET_PAGE_SIZE 4096
  41 #define SEGMENT_SIZE 0x400000
  42 #define DEFAULT_ARCH bfd_arch_i386
  43
  44 #define MY(OP) CAT(i386aout_,OP)
  45 #define TARGETNAME "a.out-i386"
  46 #define NO_WRITE_HEADER_KLUDGE 1
  47
  48 #include "bfd.h"
  49 #include "sysdep.h"
  50 #include "libbfd.h"
  51 #include "aout/aout64.h"
  52 #include "libaout.h"
  53
  54 /* Set the machine type correctly.  */
  55
  56 static boolean
  57 i386aout_write_object_contents (abfd)
  58      bfd *abfd;
  59 {
  60   struct external_exec exec_bytes;
  61   struct internal_exec *execp = exec_hdr (abfd);
  62
  63   N_SET_MACHTYPE (*execp, M_386);
  64
  65   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  66
  67   WRITE_HEADERS (abfd, execp);
  68
  69   return true;
  70 }
  71
  72 #define MY_write_object_contents i386aout_write_object_contents
  73
  74 static boolean MY(set_sizes)();
  75 #define MY_backend_data &MY(backend_data)
  76 static CONST struct aout_backend_data MY(backend_data) = {
  77   0,                            /* zmagic contiguous */
  78   1,                            /* text incl header */
  79   0,                            /* entry is text address */
  80   0,                            /* exec_hdr_flags */
  81   0,                            /* text vma? */
  82   MY(set_sizes),
  83   1,                            /* exec header not counted */
  84   0,                            /* add_dynamic_symbols */
  85   0,                            /* add_one_symbol */
  86   0,                            /* link_dynamic_object */
  87   0,                            /* write_dynamic_symbol */
  88   0,                            /* check_dynamic_reloc */
  89   0                             /* finish_dynamic_link */
  90 };
  91
  92 #include "aout-target.h"