bfd/i386dynix.c

   1 /* BFD back-end for i386 a.out binaries under dynix.
   2    Copyright (C) 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* This BFD is currently only tested with gdb, writing object files
  21    may not work.  */
  22
  23 #define BYTES_IN_WORD   4
  24 #define ARCH    32
  25
  26 #define TEXT_START_ADDR 4096
  27 #define PAGE_SIZE       4096
  28 #define SEGMENT_SIZE    PAGE_SIZE
  29
  30 #include "aout/dynix3.h"
  31
  32 #define DEFAULT_ARCH    bfd_arch_i386
  33 #define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_UNKNOWN)
  34
  35 #define MY(OP) CAT(i386dynix_,OP)
  36 #define TARGETNAME "a.out-i386-dynix"
  37
  38 #include "bfd.h"
  39 #include "sysdep.h"
  40 #include "libbfd.h"
  41 #include "libaout.h"
  42
  43 /* (Ab)use some fields in the internal exec header to be able to read
  44    executables that contain shared data.  */
  45
  46 #define a_shdata a_tload
  47 #define a_shdrsize a_dload
  48 #define aout_32_swap_exec_header_in dynix_swap_exec_header_in
  49
  50 void
  51 dynix_swap_exec_header_in (abfd, raw_bytes, execp)
  52      bfd *abfd;
  53      struct external_exec *raw_bytes;
  54      struct internal_exec *execp;
  55 {
  56   struct external_exec *bytes = (struct external_exec *)raw_bytes;
  57
  58   /* The internal_exec structure has some fields that are unused in this
  59      configuration (IE for i960), so ensure that all such uninitialized
  60      fields are zero'd out.  There are places where two of these structs
  61      are memcmp'd, and thus the contents do matter. */
  62   memset ((PTR) execp, 0, sizeof (struct internal_exec));
  63   /* Now fill in fields in the execp, from the bytes in the raw data.  */
  64   execp->a_info   = bfd_h_get_32 (abfd, bytes->e_info);
  65   execp->a_text   = GET_WORD (abfd, bytes->e_text);
  66   execp->a_data   = GET_WORD (abfd, bytes->e_data);
  67   execp->a_bss    = GET_WORD (abfd, bytes->e_bss);
  68   execp->a_syms   = GET_WORD (abfd, bytes->e_syms);
  69   execp->a_entry  = GET_WORD (abfd, bytes->e_entry);
  70   execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
  71   execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
  72   execp->a_shdata = GET_WORD (abfd, bytes->e_shdata);
  73   execp->a_shdrsize = GET_WORD (abfd, bytes->e_shdrsize);
  74 }
  75
  76 #include "aout-target.h"