bfd/i386dynix.c

   1 /* BFD back-end for i386 a.out binaries under dynix.
   2    Copyright 1994, 1995, 2001, 2003 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 2 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, MA 02110-1301, USA.  */
  19
  20 /* This BFD is currently only tested with gdb, writing object files
  21    may not work.  */
  22
  23 #define TEXT_START_ADDR 4096
  24 #define TARGET_PAGE_SIZE        4096
  25 #define SEGMENT_SIZE    TARGET_PAGE_SIZE
  26
  27 #include "aout/dynix3.h"
  28
  29 #define DEFAULT_ARCH    bfd_arch_i386
  30 #define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_UNKNOWN)
  31
  32 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
  33    remove whitespace added here, and thus will fail to concatenate
  34    the tokens.  */
  35 #define MY(OP) CONCAT2 (i386dynix_,OP)
  36 #define TARGETNAME "a.out-i386-dynix"
  37 #define NAME(x,y) CONCAT3 (i386dynix,_32_,y)
  38 #define ARCH_SIZE 32
  39 #define NAME_swap_exec_header_in NAME(i386dynix_32_,swap_exec_header_in)
  40 #define MY_get_section_contents aout_32_get_section_contents
  41
  42 /* aoutx.h requires definitions for NMAGIC, BMAGIC and QMAGIC.  */
  43 #define NMAGIC 0
  44 #define BMAGIC OMAGIC
  45 #define QMAGIC XMAGIC
  46
  47 #include "aoutx.h"
  48
  49 /* (Ab)use some fields in the internal exec header to be able to read
  50    executables that contain shared data.  */
  51
  52 #define a_shdata a_tload
  53 #define a_shdrsize a_dload
  54
  55 void
  56 i386dynix_32_swap_exec_header_in (abfd, raw_bytes, execp)
  57      bfd *abfd;
  58      struct external_exec *raw_bytes;
  59      struct internal_exec *execp;
  60 {
  61   struct external_exec *bytes = (struct external_exec *)raw_bytes;
  62
  63   /* The internal_exec structure has some fields that are unused in this
  64      configuration (IE for i960), so ensure that all such uninitialized
  65      fields are zero'd out.  There are places where two of these structs
  66      are memcmp'd, and thus the contents do matter. */
  67   memset ((PTR) execp, 0, sizeof (struct internal_exec));
  68   /* Now fill in fields in the execp, from the bytes in the raw data.  */
  69   execp->a_info   = H_GET_32 (abfd, bytes->e_info);
  70   execp->a_text   = GET_WORD (abfd, bytes->e_text);
  71   execp->a_data   = GET_WORD (abfd, bytes->e_data);
  72   execp->a_bss    = GET_WORD (abfd, bytes->e_bss);
  73   execp->a_syms   = GET_WORD (abfd, bytes->e_syms);
  74   execp->a_entry  = GET_WORD (abfd, bytes->e_entry);
  75   execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
  76   execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
  77   execp->a_shdata = GET_WORD (abfd, bytes->e_shdata);
  78   execp->a_shdrsize = GET_WORD (abfd, bytes->e_shdrsize);
  79 }
  80
  81 #include "aout-target.h"