1 /* BFD back-end definitions used by all FreeBSD targets.
2 Copyright 1990, 1991, 1992, 1996, 1997, 2000, 2001, 2002, 2005, 2007
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 /* $FreeBSD: stable/10/contrib/binutils/bfd/freebsd.h 218822 2011-02-18 20:54:12Z dim $ */
23
24 /* FreeBSD QMAGIC files have the header in the text. */
25 #define N_HEADER_IN_TEXT(x) 1
26 #define MY_text_includes_header 1
27
28 #define TEXT_START_ADDR (TARGET_PAGE_SIZE + 0x20)
29
30 /*
31 * FreeBSD uses a weird mix of byte orderings for its a_info field.
32 * Its assembler emits NetBSD style object files, with a big-endian
33 * a_info. Its linker seems to accept either byte ordering, but
34 * emits a little-endian a_info.
35 *
36 * Here, we accept either byte ordering, but always produce
37 * little-endian.
38 *
39 * FIXME - Probably we should always produce the _native_ byte
40 * ordering. I.e., it should be in the architecture-specific
41 * file, not here. But in reality, there is no chance
42 * that FreeBSD will ever use a.out in a new port.
43 */
44
45 #define N_MACHTYPE(exec) \
46 ((enum machine_type) \
47 ((freebsd_swap_magic(&(exec).a_info) >> 16) & 0x3ff))
48 #define N_FLAGS(exec) \
49 ((enum machine_type) \
50 ((freebsd_swap_magic(&(exec).a_info) >> 26) & 0x3f))
51
52 #define N_SET_INFO(exec, magic, type, flags) \
53 ((exec).a_info = ((magic) & 0xffff) \
54 | (((int)(type) & 0x3ff) << 16) \
55 | (((flags) & 0x3f) << 26))
56 #define N_SET_MACHTYPE(exec, machtype) \
57 ((exec).a_info = \
58 ((exec).a_info & 0xfb00ffff) | ((((int) (machtype)) & 0x3ff) << 16))
59 #define N_SET_FLAGS(exec, flags) \
60 ((exec).a_info = \
61 ((exec).a_info & 0x03ffffff) | ((flags & 0x03f) << 26))
62
63 #include "sysdep.h"
64 #include "bfd.h"
65 #include "libbfd.h"
66 #include "libaout.h"
67
68 #define SWAP_MAGIC(ext) (freebsd_swap_magic(ext))
69
70 #define MY_bfd_final_link MY (bfd_final_link)
71 #define MY_write_object_contents MY (write_object_contents)
72 static bfd_boolean MY (bfd_final_link) (bfd *, struct bfd_link_info *);
73 static bfd_boolean MY (write_object_contents) (bfd *);
74 static long freebsd_swap_magic (void *);
75
76 #include "aout-target.h"
77
78 static bfd_boolean
MY(bfd_final_link)79 MY (bfd_final_link) (bfd *abfd, struct bfd_link_info *info)
80 {
81 obj_aout_subformat (abfd) = q_magic_format;
82 return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
83 }
84
85 /* Swap a magic number. We accept either endian, whichever looks valid. */
86
87 static long
freebsd_swap_magic(void * ext)88 freebsd_swap_magic (void *ext)
89 {
90 long linfo = bfd_getl32(ext);
91 long binfo = bfd_getb32(ext);
92 int lmagic = linfo & 0xffff;
93 int bmagic = binfo & 0xffff;
94 int lmagic_ok = lmagic == OMAGIC || lmagic == NMAGIC ||
95 lmagic == ZMAGIC || lmagic == QMAGIC;
96 int bmagic_ok = bmagic == OMAGIC || bmagic == NMAGIC ||
97 bmagic == ZMAGIC || bmagic == QMAGIC;
98
99 return bmagic_ok && !lmagic_ok ? binfo : linfo;
100 }
101
102 /* Write an object file.
103 Section contents have already been written. We write the
104 file header, symbols, and relocation. */
105
106 static bfd_boolean
MY(write_object_contents)107 MY (write_object_contents) (bfd *abfd)
108 {
109 struct external_exec exec_bytes;
110 struct internal_exec *execp = exec_hdr (abfd);
111
112 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
113
114 /* Magic number, maestro, please! */
115 switch (bfd_get_arch(abfd))
116 {
117 case bfd_arch_m68k:
118 if (strcmp (abfd->xvec->name, "a.out-m68k4k-netbsd") == 0)
119 N_SET_MACHTYPE (*execp, M_68K4K_NETBSD);
120 else
121 N_SET_MACHTYPE (*execp, M_68K_NETBSD);
122 break;
123 case bfd_arch_sparc:
124 N_SET_MACHTYPE (*execp, M_SPARC_NETBSD);
125 break;
126 case bfd_arch_i386:
127 N_SET_MACHTYPE (*execp, M_386_NETBSD);
128 break;
129 case bfd_arch_ns32k:
130 N_SET_MACHTYPE (*execp, M_532_NETBSD);
131 break;
132 default:
133 N_SET_MACHTYPE (*execp, M_UNKNOWN);
134 break;
135 }
136
137 WRITE_HEADERS(abfd, execp);
138
139 return TRUE;
140 }
141