gnu/dist/gdb6/bfd/netbsd.h

   1 /* BFD back-end definitions used by all NetBSD targets.
   2    Copyright 1990, 1991, 1992, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2005
   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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
  20    USA.  */
  21
  22 /* Check for our machine type (part of magic number).  */
  23 #ifndef MACHTYPE_OK
  24 #define MACHTYPE_OK(m) ((m) == DEFAULT_MID || (m) == M_UNKNOWN)
  25 #endif
  26
  27 /* This is the normal load address for executables.  */
  28 #define TEXT_START_ADDR         TARGET_PAGE_SIZE
  29
  30 /* NetBSD ZMAGIC has its header in the text segment.  */
  31 #define N_HEADER_IN_TEXT(x)     1
  32
  33 /* Determine if this is a shared library using the flags.  */
  34 #define N_SHARED_LIB(x)         (N_DYNAMIC (x))
  35
  36 /* We have 6 bits of flags and 10 bits of machine ID.  */
  37 #define N_MACHTYPE(exec) \
  38         ((enum machine_type) (((exec).a_info >> 16) & 0x03ff))
  39 #define N_FLAGS(exec) \
  40         (((exec).a_info >> 26) & 0x3f)
  41
  42 #define N_SET_INFO(exec, magic, type, flags) \
  43         ((exec).a_info = ((magic) & 0xffff) \
  44          | (((int) (type) & 0x3ff) << 16) \
  45          | (((flags) & 0x3f) << 24))
  46 #define N_SET_MACHTYPE(exec, machtype) \
  47         ((exec).a_info = \
  48          ((exec).a_info & 0xfb00ffff) | ((((int) (machtype)) & 0x3ff) << 16))
  49 #define N_SET_FLAGS(exec, flags) \
  50         ((exec).a_info = \
  51          ((exec).a_info & 0x03ffffff) | ((flags & 0x03f) << 26))
  52
  53 #include "bfd.h"
  54 #include "sysdep.h"
  55 #include "libbfd.h"
  56 #include "libaout.h"
  57
  58 /* On NetBSD, the magic number is always in ntohl's "network" (big-endian)
  59    format.  */
  60 #define SWAP_MAGIC(ext) bfd_getb32 (ext)
  61
  62 /* On NetBSD, the entry point may be taken to be the start of the text
  63    section.  */
  64 #define MY_entry_is_text_address 1
  65
  66 #define MY_write_object_contents MY (write_object_contents)
  67 static bfd_boolean MY (write_object_contents) (bfd *);
  68
  69 #define MY_text_includes_header 1
  70
  71 #include "aout-target.h"
  72
  73 /* Write an object file.
  74    Section contents have already been written.  We write the
  75    file header, symbols, and relocation.  */
  76
  77 static bfd_boolean
  78 MY (write_object_contents) (bfd *abfd)
  79 {
  80   struct external_exec exec_bytes;
  81   struct internal_exec *execp = exec_hdr (abfd);
  82
  83   /* We must make certain that the magic number has been set.  This
  84      will normally have been done by set_section_contents, but only if
  85      there actually are some section contents.  */
  86   if (! abfd->output_has_begun)
  87     {
  88       bfd_size_type text_size;
  89       file_ptr text_end;
  90
  91       NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end);
  92     }
  93
  94   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  95
  96   /* Magic number, maestro, please!  */
  97   switch (bfd_get_arch(abfd))
  98     {
  99     case DEFAULT_ARCH:
 100       N_SET_MACHTYPE(*execp, DEFAULT_MID);
 101       break;
 102     default:
 103       N_SET_MACHTYPE(*execp, M_UNKNOWN);
 104       break;
 105     }
 106
 107   /* The NetBSD magic number is always big-endian */
 108 #ifndef TARGET_IS_BIG_ENDIAN_P
 109   /* XXX aren't there any macro to change byteorder of a word independent of
 110      the host's or target's endianesses?  */
 111   execp->a_info
 112     = (execp->a_info & 0xff) << 24 | (execp->a_info & 0xff00) << 8
 113       | (execp->a_info & 0xff0000) >> 8 | (execp->a_info & 0xff000000) >> 24;
 114 #endif
 115
 116   WRITE_HEADERS (abfd, execp);
 117
 118   return TRUE;
 119 }