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252b5132 | 1 | /* BFD back-end for os9000 i386 binaries. |
e2d34d7d | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | Written by Cygnus Support. |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | ||
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" | |
29 | ||
e4b17274 NC |
30 | static const bfd_target * os9k_callback PARAMS ((bfd *)); |
31 | static const bfd_target * os9k_object_p PARAMS ((bfd *)); | |
32 | static int os9k_sizeof_headers PARAMS ((bfd *, boolean)); | |
33 | boolean os9k_swap_exec_header_in PARAMS ((bfd *, mh_com *, struct internal_exec *)); | |
252b5132 RH |
34 | |
35 | /* Swaps the information in an executable header taken from a raw byte | |
36 | stream memory image, into the internal exec_header structure. */ | |
37 | boolean | |
38 | os9k_swap_exec_header_in (abfd, raw_bytes, execp) | |
39 | bfd *abfd; | |
40 | mh_com *raw_bytes; | |
41 | struct internal_exec *execp; | |
42 | { | |
43 | mh_com *bytes = (mh_com *) raw_bytes; | |
44 | unsigned int dload, dmemsize, dmemstart; | |
45 | ||
46 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
dc810e39 | 47 | execp->a_info = H_GET_16 (abfd, bytes->m_sync); |
252b5132 | 48 | execp->a_syms = 0; |
dc810e39 | 49 | execp->a_entry = H_GET_32 (abfd, bytes->m_exec); |
252b5132 RH |
50 | execp->a_talign = 2; |
51 | execp->a_dalign = 2; | |
52 | execp->a_balign = 2; | |
53 | ||
dc810e39 | 54 | dload = H_GET_32 (abfd, bytes->m_idata); |
252b5132 RH |
55 | execp->a_data = dload + 8; |
56 | ||
57 | if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 | |
dc810e39 | 58 | || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd) |
252b5132 | 59 | != sizeof (dmemstart)) |
dc810e39 | 60 | || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd) |
252b5132 RH |
61 | != sizeof (dmemsize))) |
62 | return false; | |
63 | ||
64 | execp->a_tload = 0; | |
dc810e39 | 65 | execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart); |
252b5132 | 66 | execp->a_text = dload - execp->a_tload; |
dc810e39 AM |
67 | execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize); |
68 | execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data; | |
252b5132 RH |
69 | |
70 | execp->a_trsize = 0; | |
71 | execp->a_drsize = 0; | |
72 | ||
73 | return true; | |
74 | } | |
75 | ||
76 | #if 0 | |
77 | /* Swaps the information in an internal exec header structure into the | |
78 | supplied buffer ready for writing to disk. */ | |
79 | ||
dc810e39 AM |
80 | void os9k_swap_exec_header_out |
81 | PARAMS ((bfd *, struct internal_exec *, struct mh_com *)); | |
82 | ||
252b5132 RH |
83 | void |
84 | os9k_swap_exec_header_out (abfd, execp, raw_bytes) | |
85 | bfd *abfd; | |
86 | struct internal_exec *execp; | |
87 | mh_com *raw_bytes; | |
88 | { | |
89 | mh_com *bytes = (mh_com *) raw_bytes; | |
90 | ||
91 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ | |
dc810e39 AM |
92 | H_PUT_32 (abfd, execp->a_info, bytes->e_info); |
93 | H_PUT_32 (abfd, execp->a_text, bytes->e_text); | |
94 | H_PUT_32 (abfd, execp->a_data, bytes->e_data); | |
95 | H_PUT_32 (abfd, execp->a_bss, bytes->e_bss); | |
96 | H_PUT_32 (abfd, execp->a_syms, bytes->e_syms); | |
97 | H_PUT_32 (abfd, execp->a_entry, bytes->e_entry); | |
98 | H_PUT_32 (abfd, execp->a_trsize, bytes->e_trsize); | |
99 | H_PUT_32 (abfd, execp->a_drsize, bytes->e_drsize); | |
100 | H_PUT_32 (abfd, execp->a_tload, bytes->e_tload); | |
101 | H_PUT_32 (abfd, execp->a_dload, bytes->e_dload); | |
252b5132 RH |
102 | bytes->e_talign[0] = execp->a_talign; |
103 | bytes->e_dalign[0] = execp->a_dalign; | |
104 | bytes->e_balign[0] = execp->a_balign; | |
105 | bytes->e_relaxable[0] = execp->a_relaxable; | |
106 | } | |
107 | ||
108 | #endif /* 0 */ | |
109 | ||
110 | static const bfd_target * | |
111 | os9k_object_p (abfd) | |
112 | bfd *abfd; | |
113 | { | |
114 | struct internal_exec anexec; | |
115 | mh_com exec_bytes; | |
116 | ||
dc810e39 | 117 | if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd) |
252b5132 RH |
118 | != MHCOM_BYTES_SIZE) |
119 | { | |
120 | if (bfd_get_error () != bfd_error_system_call) | |
121 | bfd_set_error (bfd_error_wrong_format); | |
122 | return 0; | |
123 | } | |
124 | ||
dc810e39 | 125 | anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync); |
252b5132 RH |
126 | if (N_BADMAG (anexec)) |
127 | { | |
128 | bfd_set_error (bfd_error_wrong_format); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) | |
133 | { | |
134 | if (bfd_get_error () != bfd_error_system_call) | |
135 | bfd_set_error (bfd_error_wrong_format); | |
136 | return NULL; | |
137 | } | |
138 | return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); | |
139 | } | |
140 | ||
141 | ||
142 | /* Finish up the opening of a b.out file for reading. Fill in all the | |
143 | fields that are not handled by common code. */ | |
144 | ||
145 | static const bfd_target * | |
146 | os9k_callback (abfd) | |
147 | bfd *abfd; | |
148 | { | |
149 | struct internal_exec *execp = exec_hdr (abfd); | |
150 | unsigned long bss_start; | |
151 | ||
e4b17274 | 152 | /* Architecture and machine type. */ |
252b5132 RH |
153 | bfd_set_arch_mach (abfd, bfd_arch_i386, 0); |
154 | ||
155 | /* The positions of the string table and symbol table. */ | |
156 | obj_str_filepos (abfd) = 0; | |
157 | obj_sym_filepos (abfd) = 0; | |
158 | ||
e4b17274 | 159 | /* The alignments of the sections. */ |
252b5132 RH |
160 | obj_textsec (abfd)->alignment_power = execp->a_talign; |
161 | obj_datasec (abfd)->alignment_power = execp->a_dalign; | |
162 | obj_bsssec (abfd)->alignment_power = execp->a_balign; | |
163 | ||
164 | /* The starting addresses of the sections. */ | |
165 | obj_textsec (abfd)->vma = execp->a_tload; | |
166 | obj_datasec (abfd)->vma = execp->a_dload; | |
167 | ||
e4b17274 | 168 | /* And reload the sizes, since the aout module zaps them. */ |
252b5132 RH |
169 | obj_textsec (abfd)->_raw_size = execp->a_text; |
170 | ||
e4b17274 | 171 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ |
252b5132 RH |
172 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); |
173 | ||
e4b17274 | 174 | /* The file positions of the sections. */ |
252b5132 RH |
175 | obj_textsec (abfd)->filepos = execp->a_entry; |
176 | obj_datasec (abfd)->filepos = execp->a_dload; | |
177 | ||
178 | /* The file positions of the relocation info *** | |
179 | obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); | |
e4b17274 | 180 | obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */ |
252b5132 | 181 | |
e4b17274 NC |
182 | adata (abfd).page_size = 1; /* Not applicable. */ |
183 | adata (abfd).segment_size = 1;/* Not applicable. */ | |
252b5132 RH |
184 | adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; |
185 | ||
186 | return abfd->xvec; | |
187 | } | |
188 | ||
189 | #if 0 | |
190 | struct bout_data_struct | |
191 | { | |
192 | struct aoutdata a; | |
193 | struct internal_exec e; | |
194 | }; | |
195 | ||
196 | static boolean | |
197 | os9k_mkobject (abfd) | |
198 | bfd *abfd; | |
199 | { | |
200 | struct bout_data_struct *rawptr; | |
dc810e39 | 201 | bfd_size_type amt = sizeof (struct bout_data_struct); |
252b5132 | 202 | |
dc810e39 | 203 | rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, amt); |
252b5132 RH |
204 | if (rawptr == NULL) |
205 | return false; | |
206 | ||
207 | abfd->tdata.bout_data = rawptr; | |
208 | exec_hdr (abfd) = &rawptr->e; | |
209 | ||
210 | obj_textsec (abfd) = (asection *) NULL; | |
211 | obj_datasec (abfd) = (asection *) NULL; | |
212 | obj_bsssec (abfd) = (asection *) NULL; | |
213 | ||
214 | return true; | |
215 | } | |
216 | ||
217 | static boolean | |
218 | os9k_write_object_contents (abfd) | |
219 | bfd *abfd; | |
220 | { | |
221 | struct external_exec swapped_hdr; | |
222 | ||
223 | if (! aout_32_make_sections (abfd)) | |
224 | return false; | |
225 | ||
226 | exec_hdr (abfd)->a_info = BMAGIC; | |
227 | ||
228 | exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size; | |
229 | exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size; | |
230 | exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size; | |
231 | exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); | |
232 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
233 | exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * | |
234 | sizeof (struct relocation_info)); | |
235 | exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * | |
236 | sizeof (struct relocation_info)); | |
237 | ||
238 | exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; | |
239 | exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; | |
240 | exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; | |
241 | ||
242 | exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; | |
243 | exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; | |
244 | ||
245 | bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); | |
246 | ||
247 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
dc810e39 AM |
248 | || bfd_bwrite ((PTR) & swapped_hdr, (bfd_size_type) EXEC_BYTES_SIZE, |
249 | abfd) != EXEC_BYTES_SIZE) | |
252b5132 RH |
250 | return false; |
251 | ||
e4b17274 | 252 | /* Now write out reloc info, followed by syms and strings. */ |
252b5132 RH |
253 | if (bfd_get_symcount (abfd) != 0) |
254 | { | |
255 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET) | |
256 | != 0) | |
257 | return false; | |
258 | ||
259 | if (!aout_32_write_syms (abfd)) | |
260 | return false; | |
261 | ||
262 | if (bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET) | |
263 | != 0) | |
264 | return false; | |
265 | ||
266 | if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) | |
267 | return false; | |
268 | if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET) | |
269 | != 0) | |
270 | return false; | |
271 | ||
272 | if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) | |
273 | return false; | |
274 | } | |
275 | return true; | |
276 | } | |
277 | \f | |
278 | static boolean | |
279 | os9k_set_section_contents (abfd, section, location, offset, count) | |
280 | bfd *abfd; | |
281 | sec_ptr section; | |
282 | unsigned char *location; | |
283 | file_ptr offset; | |
284 | int count; | |
285 | { | |
286 | ||
287 | if (abfd->output_has_begun == false) | |
288 | { /* set by bfd.c handler */ | |
289 | if (! aout_32_make_sections (abfd)) | |
290 | return false; | |
291 | ||
292 | obj_textsec (abfd)->filepos = sizeof (struct internal_exec); | |
293 | obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos | |
294 | + obj_textsec (abfd)->_raw_size; | |
295 | ||
296 | } | |
e4b17274 | 297 | /* Regardless, once we know what we're doing, we might as well get going. */ |
252b5132 RH |
298 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) |
299 | return false; | |
300 | ||
301 | if (count != 0) | |
dc810e39 | 302 | return bfd_bwrite ((PTR) location, (bfd_size_type) count, abfd) == count; |
e4b17274 | 303 | |
252b5132 RH |
304 | return true; |
305 | } | |
306 | #endif /* 0 */ | |
307 | ||
308 | static int | |
309 | os9k_sizeof_headers (ignore_abfd, ignore) | |
5f771d47 ILT |
310 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
311 | boolean ignore ATTRIBUTE_UNUSED; | |
252b5132 RH |
312 | { |
313 | return sizeof (struct internal_exec); | |
314 | } | |
315 | ||
e4b17274 | 316 | \f |
252b5132 RH |
317 | |
318 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info | |
319 | ||
320 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
321 | ||
322 | #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup | |
323 | ||
324 | #define aout_32_get_section_contents_in_window \ | |
325 | _bfd_generic_get_section_contents_in_window | |
326 | ||
327 | #define os9k_bfd_get_relocated_section_contents \ | |
328 | bfd_generic_get_relocated_section_contents | |
329 | #define os9k_bfd_relax_section bfd_generic_relax_section | |
330 | #define os9k_bfd_gc_sections bfd_generic_gc_sections | |
8550eb6e | 331 | #define os9k_bfd_merge_sections bfd_generic_merge_sections |
e61463e1 | 332 | #define os9k_bfd_discard_group bfd_generic_discard_group |
252b5132 | 333 | #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
e2d34d7d | 334 | #define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free |
252b5132 | 335 | #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols |
2d653fc7 | 336 | #define os9k_bfd_link_just_syms _bfd_generic_link_just_syms |
252b5132 RH |
337 | #define os9k_bfd_final_link _bfd_generic_final_link |
338 | #define os9k_bfd_link_split_section _bfd_generic_link_split_section | |
339 | ||
340 | const bfd_target i386os9k_vec = | |
e4b17274 NC |
341 | { |
342 | "i386os9k", /* name */ | |
343 | bfd_target_os9k_flavour, | |
344 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
345 | BFD_ENDIAN_LITTLE, /* hdr byte order is little */ | |
346 | (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ | |
347 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ | |
348 | 0, /* symbol leading char */ | |
349 | ' ', /* ar_pad_char */ | |
350 | 16, /* ar_max_namelen */ | |
351 | ||
352 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
353 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
354 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
355 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
356 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
357 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
358 | {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ | |
359 | bfd_generic_archive_p, _bfd_dummy_target}, | |
360 | {bfd_false, bfd_false, /* bfd_set_format */ | |
361 | _bfd_generic_mkarchive, bfd_false}, | |
362 | {bfd_false, bfd_false, /* bfd_write_contents */ | |
363 | _bfd_write_archive_contents, bfd_false}, | |
364 | ||
365 | BFD_JUMP_TABLE_GENERIC (aout_32), | |
366 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
367 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
368 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), | |
369 | BFD_JUMP_TABLE_SYMBOLS (aout_32), | |
370 | BFD_JUMP_TABLE_RELOCS (aout_32), | |
371 | BFD_JUMP_TABLE_WRITE (aout_32), | |
372 | BFD_JUMP_TABLE_LINK (os9k), | |
373 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
dc810e39 | 374 | |
e4b17274 NC |
375 | NULL, |
376 | ||
377 | (PTR) 0, | |
378 | }; |