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,
   3    2005, 2007, 2011  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 3 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,
  20    MA 02110-1301, USA.  */
  21
  22
  23 /* Check for our machine type (part of magic number).  */
  24 #ifndef MACHTYPE_OK
  25 #define MACHTYPE_OK(m) ((m) == DEFAULT_MID || (m) == M_UNKNOWN)
  26 #endif
  27
  28 /* This is the normal load address for executables.  */
  29 #define TEXT_START_ADDR         TARGET_PAGE_SIZE
  30
  31 /* NetBSD ZMAGIC has its header in the text segment.  */
  32 #define N_HEADER_IN_TEXT(x)     1
  33
  34 /* Determine if this is a shared library using the flags.  */
  35 #define N_SHARED_LIB(x)         (N_DYNAMIC (x))
  36
  37 /* We have 6 bits of flags and 10 bits of machine ID.  */
  38 #define N_MACHTYPE(exec) \
  39         ((enum machine_type) (((exec).a_info >> 16) & 0x03ff))
  40 #define N_FLAGS(exec) \
  41         (((exec).a_info >> 26) & 0x3f)
  42
  43 #define N_SET_INFO(exec, magic, type, flags) \
  44         ((exec).a_info = ((magic) & 0xffff) \
  45          | (((int) (type) & 0x3ff) << 16) \
  46          | (((flags) & 0x3f) << 24))
  47 #define N_SET_MACHTYPE(exec, machtype) \
  48         ((exec).a_info = \
  49          ((exec).a_info & 0xfb00ffff) | ((((int) (machtype)) & 0x3ff) << 16))
  50 #define N_SET_FLAGS(exec, flags) \
  51         ((exec).a_info = \
  52          ((exec).a_info & 0x03ffffff) | ((flags & 0x03f) << 26))
  53
  54 #include "sysdep.h"
  55 #include "bfd.h"
  56 #include "libbfd.h"
  57 #include "libaout.h"
  58
  59 /* On NetBSD, the magic number is always in ntohl's "network" (big-endian)
  60    format.  */
  61 #define SWAP_MAGIC(ext) bfd_getb32 (ext)
  62
  63 /* On NetBSD, the entry point may be taken to be the start of the text
  64    section.  */
  65 #define MY_entry_is_text_address 1
  66
  67 #define MY_write_object_contents MY (write_object_contents)
  68 static bfd_boolean MY (write_object_contents) (bfd *);
  69
  70 #define MY_text_includes_header 1
  71
  72 #include "aout-target.h"
  73
  74 /* Write an object file.
  75    Section contents have already been written.  We write the
  76    file header, symbols, and relocation.  */
  77
  78 static bfd_boolean
  79 MY (write_object_contents) (bfd *abfd)
  80 {
  81   struct external_exec exec_bytes;
  82   struct internal_exec *execp = exec_hdr (abfd);
  83
  84   /* We must make certain that the magic number has been set.  This
  85      will normally have been done by set_section_contents, but only if
  86      there actually are some section contents.  */
  87   if (! abfd->output_has_begun)
  88     {
  89       bfd_size_type text_size;
  90       file_ptr text_end;
  91
  92       NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end);
  93     }
  94
  95   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  96
  97   /* Magic number, maestro, please!  */
  98   switch (bfd_get_arch(abfd))
  99     {
 100     case DEFAULT_ARCH:
 101       N_SET_MACHTYPE(*execp, DEFAULT_MID);
 102       break;
 103     default:
 104       N_SET_MACHTYPE(*execp, M_UNKNOWN);
 105       break;
 106     }
 107
 108   /* The NetBSD magic number is always big-endian.  */
 109 #ifndef TARGET_IS_BIG_ENDIAN_P
 110   /* XXX aren't there any macro to change byteorder of a word independent of
 111      the host's or target's endiannesses?  */
 112   execp->a_info
 113     = (execp->a_info & 0xff) << 24 | (execp->a_info & 0xff00) << 8
 114       | (execp->a_info & 0xff0000) >> 8 | (execp->a_info & 0xff000000) >> 24;
 115 #endif
 116
 117   WRITE_HEADERS (abfd, execp);
 118
 119   return TRUE;
 120 }