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[binutils.git] / bfd / i386os9k.c
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1 /* BFD back-end for os9000 i386 binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002,
3 2004, 2005 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libbfd.h"
26 #include "bfdlink.h"
27 #include "libaout.h" /* BFD a.out internal data structures */
28 #include "os9k.h"
30 static const bfd_target * os9k_callback
31 PARAMS ((bfd *));
32 static const bfd_target * os9k_object_p
33 PARAMS ((bfd *));
34 static int os9k_sizeof_headers
35 PARAMS ((bfd *, bfd_boolean));
36 bfd_boolean os9k_swap_exec_header_in
37 PARAMS ((bfd *, mh_com *, struct internal_exec *));
39 /* Swaps the information in an executable header taken from a raw byte
40 stream memory image, into the internal exec_header structure. */
41 bfd_boolean
42 os9k_swap_exec_header_in (abfd, raw_bytes, execp)
43 bfd *abfd;
44 mh_com *raw_bytes;
45 struct internal_exec *execp;
47 mh_com *bytes = (mh_com *) raw_bytes;
48 unsigned int dload, dmemsize, dmemstart;
50 /* Now fill in fields in the execp, from the bytes in the raw data. */
51 execp->a_info = H_GET_16 (abfd, bytes->m_sync);
52 execp->a_syms = 0;
53 execp->a_entry = H_GET_32 (abfd, bytes->m_exec);
54 execp->a_talign = 2;
55 execp->a_dalign = 2;
56 execp->a_balign = 2;
58 dload = H_GET_32 (abfd, bytes->m_idata);
59 execp->a_data = dload + 8;
61 if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
62 || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd)
63 != sizeof (dmemstart))
64 || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd)
65 != sizeof (dmemsize)))
66 return FALSE;
68 execp->a_tload = 0;
69 execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart);
70 execp->a_text = dload - execp->a_tload;
71 execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize);
72 execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data;
74 execp->a_trsize = 0;
75 execp->a_drsize = 0;
77 return TRUE;
80 static const bfd_target *
81 os9k_object_p (abfd)
82 bfd *abfd;
84 struct internal_exec anexec;
85 mh_com exec_bytes;
87 if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd)
88 != MHCOM_BYTES_SIZE)
90 if (bfd_get_error () != bfd_error_system_call)
91 bfd_set_error (bfd_error_wrong_format);
92 return 0;
95 anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync);
96 if (N_BADMAG (anexec))
98 bfd_set_error (bfd_error_wrong_format);
99 return 0;
102 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
104 if (bfd_get_error () != bfd_error_system_call)
105 bfd_set_error (bfd_error_wrong_format);
106 return NULL;
108 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
112 /* Finish up the opening of a b.out file for reading. Fill in all the
113 fields that are not handled by common code. */
115 static const bfd_target *
116 os9k_callback (abfd)
117 bfd *abfd;
119 struct internal_exec *execp = exec_hdr (abfd);
120 unsigned long bss_start;
122 /* Architecture and machine type. */
123 bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
125 /* The positions of the string table and symbol table. */
126 obj_str_filepos (abfd) = 0;
127 obj_sym_filepos (abfd) = 0;
129 /* The alignments of the sections. */
130 obj_textsec (abfd)->alignment_power = execp->a_talign;
131 obj_datasec (abfd)->alignment_power = execp->a_dalign;
132 obj_bsssec (abfd)->alignment_power = execp->a_balign;
134 /* The starting addresses of the sections. */
135 obj_textsec (abfd)->vma = execp->a_tload;
136 obj_datasec (abfd)->vma = execp->a_dload;
138 /* And reload the sizes, since the aout module zaps them. */
139 obj_textsec (abfd)->size = execp->a_text;
141 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */
142 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
144 /* The file positions of the sections. */
145 obj_textsec (abfd)->filepos = execp->a_entry;
146 obj_datasec (abfd)->filepos = execp->a_dload;
148 /* The file positions of the relocation info ***
149 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
150 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */
152 adata (abfd).page_size = 1; /* Not applicable. */
153 adata (abfd).segment_size = 1;/* Not applicable. */
154 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
156 return abfd->xvec;
159 static int
160 os9k_sizeof_headers (ignore_abfd, ignore)
161 bfd *ignore_abfd ATTRIBUTE_UNUSED;
162 bfd_boolean ignore ATTRIBUTE_UNUSED;
164 return sizeof (struct internal_exec);
169 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
171 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
173 #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
175 #define aout_32_get_section_contents_in_window \
176 _bfd_generic_get_section_contents_in_window
178 #define os9k_bfd_get_relocated_section_contents \
179 bfd_generic_get_relocated_section_contents
180 #define os9k_bfd_relax_section bfd_generic_relax_section
181 #define os9k_bfd_gc_sections bfd_generic_gc_sections
182 #define os9k_bfd_merge_sections bfd_generic_merge_sections
183 #define os9k_bfd_is_group_section bfd_generic_is_group_section
184 #define os9k_bfd_discard_group bfd_generic_discard_group
185 #define os9k_section_already_linked \
186 _bfd_generic_section_already_linked
187 #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
188 #define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
189 #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
190 #define os9k_bfd_link_just_syms _bfd_generic_link_just_syms
191 #define os9k_bfd_final_link _bfd_generic_final_link
192 #define os9k_bfd_link_split_section _bfd_generic_link_split_section
194 const bfd_target i386os9k_vec =
196 "i386os9k", /* name */
197 bfd_target_os9k_flavour,
198 BFD_ENDIAN_LITTLE, /* data byte order is little */
199 BFD_ENDIAN_LITTLE, /* hdr byte order is little */
200 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
201 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
202 0, /* symbol leading char */
203 ' ', /* ar_pad_char */
204 16, /* ar_max_namelen */
206 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
207 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
208 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
209 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
210 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
211 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
212 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
213 bfd_generic_archive_p, _bfd_dummy_target},
214 {bfd_false, bfd_false, /* bfd_set_format */
215 _bfd_generic_mkarchive, bfd_false},
216 {bfd_false, bfd_false, /* bfd_write_contents */
217 _bfd_write_archive_contents, bfd_false},
219 BFD_JUMP_TABLE_GENERIC (aout_32),
220 BFD_JUMP_TABLE_COPY (_bfd_generic),
221 BFD_JUMP_TABLE_CORE (_bfd_nocore),
222 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
223 BFD_JUMP_TABLE_SYMBOLS (aout_32),
224 BFD_JUMP_TABLE_RELOCS (aout_32),
225 BFD_JUMP_TABLE_WRITE (aout_32),
226 BFD_JUMP_TABLE_LINK (os9k),
227 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
229 NULL,
231 (PTR) 0,