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 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 "sysdep.h"
54#include "bfd.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)
67static 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
77static bfd_boolean
78MY (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}
120