1 /* BFD back-end for i386 a.out binaries.
2 Copyright (C) 1990, 1991 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
9 (at your option) any later version.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 #define PAGE_SIZE 4096
21 #define SEGMENT_SIZE PAGE_SIZE
22 #define TEXT_START_ADDR 0x8000
24 #define BYTES_IN_WORD 4
32 /**From: bothner@cs.wisc.edu***********************************************/
34 #define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? PAGE_SIZE : EXEC_BYTES_SIZE)
35 /**************************************************************************/
39 #include "libaout.h" /* BFD a.out internal data structures */
41 bfd_target
*aout386_callback ();
44 DEFUN(aout386_object_p
,(abfd
),
47 struct external_exec exec_bytes
;
48 struct internal_exec exec
;
50 if (bfd_read ((PTR
) &exec_bytes
, 1, EXEC_BYTES_SIZE
, abfd
)
52 bfd_error
= wrong_format
;
56 exec
.a_info
= bfd_h_get_32 (abfd
, exec_bytes
.e_info
);
58 if (N_BADMAG (exec
)) return 0;
60 NAME(aout
,swap_exec_header_in
)(abfd
, &exec_bytes
, &exec
);
61 return aout_32_some_aout_object_p (abfd
, &exec
, aout386_callback
);
64 /* Finish up the reading of the file header */
66 DEFUN(aout386_callback
,(abfd
),
69 struct internal_exec
*execp
= exec_hdr (abfd
);
71 WORK_OUT_FILE_POSITIONS(abfd
, execp
) ;
73 /* Determine the architecture and machine type of the object file. */
74 bfd_default_set_arch_mach(abfd
, bfd_arch_i386
, 0);
79 /* Write an object file.
80 Section contents have already been written. We write the
81 file header, symbols, and relocation. */
84 DEFUN(aout386_write_object_contents
,(abfd
),
87 bfd_size_type data_pad
= 0;
88 struct external_exec exec_bytes
;
89 struct internal_exec
*execp
= exec_hdr (abfd
);
91 WRITE_HEADERS(abfd
, execp
);
97 /* We use BSD archive files. */
98 #define aout386_openr_next_archived_file bfd_generic_openr_next_archived_file
99 #define aout386_generic_stat_arch_elt bfd_generic_stat_arch_elt
100 #define aout386_slurp_armap bfd_slurp_bsd_armap
101 #define aout386_slurp_extended_name_table bfd_true
102 #define aout386_write_armap bsd_write_armap
103 #define aout386_truncate_arname bfd_bsd_truncate_arname
105 /* We don't support core files here. */
106 #define aout386_core_file_failing_command _bfd_dummy_core_file_failing_command
107 #define aout386_core_file_failing_signal _bfd_dummy_core_file_failing_signal
108 #define aout386_core_file_matches_executable_p \
109 _bfd_dummy_core_file_matches_executable_p
110 #define aout386_core_file_p _bfd_dummy_target
112 #define aout386_bfd_debug_info_start bfd_void
113 #define aout386_bfd_debug_info_end bfd_void
114 #define aout386_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
116 #define aout386_mkobject aout_32_mkobject
117 #define aout386_close_and_cleanup aout_32_close_and_cleanup
118 #define aout386_set_section_contents aout_32_set_section_contents
119 #define aout386_get_section_contents aout_32_get_section_contents
120 #define aout386_new_section_hook aout_32_new_section_hook
121 #define aout386_get_symtab_upper_bound aout_32_get_symtab_upper_bound
122 #define aout386_get_symtab aout_32_get_symtab
123 #define aout386_get_reloc_upper_bound aout_32_get_reloc_upper_bound
124 #define aout386_canonicalize_reloc aout_32_canonicalize_reloc
125 #define aout386_make_empty_symbol aout_32_make_empty_symbol
126 #define aout386_print_symbol aout_32_print_symbol
127 #define aout386_get_lineno aout_32_get_lineno
128 #define aout386_set_arch_mach aout_32_set_arch_mach
129 #define aout386_find_nearest_line aout_32_find_nearest_line
130 #define aout386_sizeof_headers aout_32_sizeof_headers
132 bfd_target i386aout_vec
= /* Intel 386 running a.out, embedded. */
134 "a.out-i386", /* name */
135 bfd_target_aout_flavour
,
136 false, /* target byte order */
137 false, /* target headers byte order */
138 (HAS_RELOC
| EXEC_P
| /* object flags */
139 HAS_LINENO
| HAS_DEBUG
|
140 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
| D_PAGED
),
141 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
142 ' ', /* ar_pad_char */
143 16, /* ar_max_namelen */
144 1, /* minimum alignment */
145 /* data swap routines */
146 _do_getl64
, _do_putl64
, _do_getl32
, _do_putl32
, _do_getl16
, _do_putl16
,
147 /* header swap routines */
148 _do_getl64
, _do_putl64
, _do_getl32
, _do_putl32
, _do_getl16
, _do_putl16
,
150 {_bfd_dummy_target
, aout386_object_p
, /* bfd_check_format */
151 bfd_generic_archive_p
, aout386_core_file_p
},
152 {bfd_false
, aout386_mkobject
, /* bfd_set_format */
153 _bfd_generic_mkarchive
, bfd_false
},
154 {bfd_false
, aout386_write_object_contents
, /* bfd_write_contents */
155 _bfd_write_archive_contents
, bfd_false
},