1/* BFD back-end definitions used by all NetBSD targets.
2   Copyright (C) 1990-2017 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 3 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,
19   MA 02110-1301, USA.  */
20
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(execp) \
38	((enum machine_type) (((execp)->a_info >> 16) & 0x03ff))
39#define N_FLAGS(execp) \
40	(((execp)->a_info >> 26) & 0x3f)
41
42#define N_SET_INFO(execp, magic, type, flags) \
43	((execp)->a_info = ((magic) & 0xffff) \
44	 | (((int) (type) & 0x3ff) << 16) \
45	 | (((flags) & 0x3f) << 24))
46#define N_SET_MACHTYPE(execp, machtype) \
47	((execp)->a_info = \
48         ((execp)->a_info & 0xfb00ffff) | ((((int) (machtype)) & 0x3ff) << 16))
49#define N_SET_FLAGS(execp, flags) \
50	((execp)->a_info = \
51	 ((execp)->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    NAME (aout, adjust_sizes_and_vmas) (abfd);
88
89  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
90
91  /* Magic number, maestro, please!  */
92  switch (bfd_get_arch(abfd))
93    {
94    case DEFAULT_ARCH:
95      N_SET_MACHTYPE (execp, DEFAULT_MID);
96      break;
97    default:
98      N_SET_MACHTYPE (execp, M_UNKNOWN);
99      break;
100    }
101
102  /* The NetBSD magic number is always big-endian.  */
103#ifndef TARGET_IS_BIG_ENDIAN_P
104  /* XXX aren't there any macro to change byteorder of a word independent of
105     the host's or target's endiannesses?  */
106  execp->a_info
107    = (execp->a_info & 0xff) << 24 | (execp->a_info & 0xff00) << 8
108      | (execp->a_info & 0xff0000) >> 8 | (execp->a_info & 0xff000000) >> 24;
109#endif
110
111  WRITE_HEADERS (abfd, execp);
112
113  return TRUE;
114}
115