1 /* BFD back-end definitions used by all NetBSD targets.
2 Copyright (C) 1990-2021 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 & 0x3fu) << 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)
67 static bool 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 bool
MY(write_object_contents)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 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 & 0xffu) << 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