Commit | Line | Data |
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2f88343d | 1 | /* BFD back-end for os9000 i386 binaries. |
dfc1c006 | 2 | Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
2f88343d KH |
3 | Written by Cygnus Support. |
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | #include "bfdlink.h" | |
26 | #include "libaout.h" /* BFD a.out internal data structures */ | |
27 | #include "os9k.h" | |
28 | ||
29 | static bfd_target *os9k_callback PARAMS ((bfd *)); | |
30 | ||
31 | /* Swaps the information in an executable header taken from a raw byte | |
32 | stream memory image, into the internal exec_header structure. */ | |
2baa7d54 | 33 | boolean |
9deaaaf1 ILT |
34 | os9k_swap_exec_header_in (abfd, raw_bytes, execp) |
35 | bfd *abfd; | |
36 | mh_com *raw_bytes; | |
37 | struct internal_exec *execp; | |
2f88343d | 38 | { |
9deaaaf1 | 39 | mh_com *bytes = (mh_com *) raw_bytes; |
2f88343d KH |
40 | unsigned int dload, dmemsize, dmemstart; |
41 | ||
42 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
9deaaaf1 ILT |
43 | execp->a_info = bfd_h_get_16 (abfd, bytes->m_sync); |
44 | execp->a_syms = 0; | |
45 | execp->a_entry = bfd_h_get_32 (abfd, bytes->m_exec); | |
2f88343d KH |
46 | execp->a_talign = 2; |
47 | execp->a_dalign = 2; | |
48 | execp->a_balign = 2; | |
49 | ||
9deaaaf1 | 50 | dload = bfd_h_get_32 (abfd, bytes->m_idata); |
2f88343d KH |
51 | execp->a_data = dload + 8; |
52 | ||
2baa7d54 ILT |
53 | if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 |
54 | || (bfd_read (&dmemstart, sizeof (dmemstart), 1, abfd) | |
55 | != sizeof (dmemstart)) | |
56 | || (bfd_read (&dmemsize, sizeof (dmemsize), 1, abfd) | |
57 | != sizeof (dmemsize))) | |
58 | return false; | |
2f88343d | 59 | |
9deaaaf1 ILT |
60 | execp->a_tload = 0; |
61 | execp->a_dload = bfd_h_get_32 (abfd, (unsigned char *) &dmemstart); | |
2f88343d | 62 | execp->a_text = dload - execp->a_tload; |
9deaaaf1 | 63 | execp->a_data = bfd_h_get_32 (abfd, (unsigned char *) &dmemsize); |
2f88343d KH |
64 | execp->a_bss = bfd_h_get_32 (abfd, bytes->m_data) - execp->a_data; |
65 | ||
66 | execp->a_trsize = 0; | |
67 | execp->a_drsize = 0; | |
2baa7d54 ILT |
68 | |
69 | return true; | |
2f88343d KH |
70 | } |
71 | ||
72 | #if 0 | |
73 | /* Swaps the information in an internal exec header structure into the | |
74 | supplied buffer ready for writing to disk. */ | |
75 | ||
9deaaaf1 ILT |
76 | PROTO (void, os9k_swap_exec_header_out, |
77 | (bfd * abfd, | |
78 | struct internal_exec * execp, | |
79 | struct mh_com * raw_bytes)); | |
2f88343d | 80 | void |
9deaaaf1 ILT |
81 | os9k_swap_exec_header_out (abfd, execp, raw_bytes) |
82 | bfd *abfd; | |
83 | struct internal_exec *execp; | |
84 | mh_com *raw_bytes; | |
2f88343d | 85 | { |
9deaaaf1 | 86 | mh_com *bytes = (mh_com *) raw_bytes; |
2f88343d KH |
87 | |
88 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ | |
9deaaaf1 ILT |
89 | bfd_h_put_32 (abfd, execp->a_info, bytes->e_info); |
90 | bfd_h_put_32 (abfd, execp->a_text, bytes->e_text); | |
91 | bfd_h_put_32 (abfd, execp->a_data, bytes->e_data); | |
92 | bfd_h_put_32 (abfd, execp->a_bss, bytes->e_bss); | |
93 | bfd_h_put_32 (abfd, execp->a_syms, bytes->e_syms); | |
94 | bfd_h_put_32 (abfd, execp->a_entry, bytes->e_entry); | |
2f88343d KH |
95 | bfd_h_put_32 (abfd, execp->a_trsize, bytes->e_trsize); |
96 | bfd_h_put_32 (abfd, execp->a_drsize, bytes->e_drsize); | |
9deaaaf1 ILT |
97 | bfd_h_put_32 (abfd, execp->a_tload, bytes->e_tload); |
98 | bfd_h_put_32 (abfd, execp->a_dload, bytes->e_dload); | |
2f88343d KH |
99 | bytes->e_talign[0] = execp->a_talign; |
100 | bytes->e_dalign[0] = execp->a_dalign; | |
101 | bytes->e_balign[0] = execp->a_balign; | |
102 | bytes->e_relaxable[0] = execp->a_relaxable; | |
103 | } | |
9deaaaf1 ILT |
104 | |
105 | #endif /* 0 */ | |
2f88343d KH |
106 | |
107 | static bfd_target * | |
108 | os9k_object_p (abfd) | |
109 | bfd *abfd; | |
110 | { | |
111 | struct internal_exec anexec; | |
112 | mh_com exec_bytes; | |
113 | ||
9deaaaf1 ILT |
114 | if (bfd_read ((PTR) & exec_bytes, MHCOM_BYTES_SIZE, 1, abfd) |
115 | != MHCOM_BYTES_SIZE) | |
116 | { | |
2baa7d54 ILT |
117 | if (bfd_get_error () != bfd_error_system_call) |
118 | bfd_set_error (bfd_error_wrong_format); | |
9deaaaf1 ILT |
119 | return 0; |
120 | } | |
2f88343d KH |
121 | |
122 | anexec.a_info = bfd_h_get_16 (abfd, exec_bytes.m_sync); | |
9deaaaf1 ILT |
123 | if (N_BADMAG (anexec)) |
124 | { | |
125 | bfd_set_error (bfd_error_wrong_format); | |
126 | return 0; | |
127 | } | |
2f88343d | 128 | |
2baa7d54 ILT |
129 | if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) |
130 | { | |
131 | if (bfd_get_error () != bfd_error_system_call) | |
132 | bfd_set_error (bfd_error_wrong_format); | |
133 | return NULL; | |
134 | } | |
2f88343d KH |
135 | return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); |
136 | } | |
137 | ||
138 | ||
139 | /* Finish up the opening of a b.out file for reading. Fill in all the | |
140 | fields that are not handled by common code. */ | |
141 | ||
142 | static bfd_target * | |
143 | os9k_callback (abfd) | |
144 | bfd *abfd; | |
145 | { | |
146 | struct internal_exec *execp = exec_hdr (abfd); | |
147 | unsigned long bss_start; | |
148 | ||
149 | /* Architecture and machine type */ | |
9deaaaf1 | 150 | bfd_set_arch_mach (abfd, bfd_arch_i386, 0); |
2f88343d KH |
151 | |
152 | /* The positions of the string table and symbol table. */ | |
153 | obj_str_filepos (abfd) = 0; | |
154 | obj_sym_filepos (abfd) = 0; | |
155 | ||
156 | /* The alignments of the sections */ | |
157 | obj_textsec (abfd)->alignment_power = execp->a_talign; | |
158 | obj_datasec (abfd)->alignment_power = execp->a_dalign; | |
9deaaaf1 | 159 | obj_bsssec (abfd)->alignment_power = execp->a_balign; |
2f88343d KH |
160 | |
161 | /* The starting addresses of the sections. */ | |
162 | obj_textsec (abfd)->vma = execp->a_tload; | |
163 | obj_datasec (abfd)->vma = execp->a_dload; | |
164 | ||
165 | /* And reload the sizes, since the aout module zaps them */ | |
166 | obj_textsec (abfd)->_raw_size = execp->a_text; | |
167 | ||
9deaaaf1 | 168 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */ |
2f88343d KH |
169 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); |
170 | ||
171 | /* The file positions of the sections */ | |
172 | obj_textsec (abfd)->filepos = execp->a_entry; | |
173 | obj_datasec (abfd)->filepos = execp->a_dload; | |
174 | ||
175 | /* The file positions of the relocation info *** | |
176 | obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); | |
177 | obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); | |
178 | */ | |
179 | ||
9deaaaf1 ILT |
180 | adata (abfd).page_size = 1; /* Not applicable. */ |
181 | adata (abfd).segment_size = 1;/* Not applicable. */ | |
182 | adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; | |
2f88343d KH |
183 | |
184 | return abfd->xvec; | |
185 | } | |
186 | ||
187 | #if 0 | |
9deaaaf1 ILT |
188 | struct bout_data_struct |
189 | { | |
190 | struct aoutdata a; | |
191 | struct internal_exec e; | |
2f88343d KH |
192 | }; |
193 | ||
194 | static boolean | |
195 | os9k_mkobject (abfd) | |
196 | bfd *abfd; | |
197 | { | |
198 | struct bout_data_struct *rawptr; | |
199 | ||
200 | rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct)); | |
9deaaaf1 ILT |
201 | if (rawptr == NULL) |
202 | { | |
bb37e716 | 203 | bfd_set_error (bfd_error_no_memory); |
2f88343d KH |
204 | return false; |
205 | } | |
206 | ||
207 | abfd->tdata.bout_data = rawptr; | |
208 | exec_hdr (abfd) = &rawptr->e; | |
209 | ||
210 | /* For simplicity's sake we just make all the sections right here. */ | |
9deaaaf1 ILT |
211 | obj_textsec (abfd) = (asection *) NULL; |
212 | obj_datasec (abfd) = (asection *) NULL; | |
213 | obj_bsssec (abfd) = (asection *) NULL; | |
2f88343d KH |
214 | |
215 | bfd_make_section (abfd, ".text"); | |
216 | bfd_make_section (abfd, ".data"); | |
217 | bfd_make_section (abfd, ".bss"); | |
218 | ||
219 | return true; | |
220 | } | |
221 | ||
222 | static boolean | |
223 | os9k_write_object_contents (abfd) | |
224 | bfd *abfd; | |
225 | { | |
226 | struct external_exec swapped_hdr; | |
227 | ||
228 | exec_hdr (abfd)->a_info = BMAGIC; | |
229 | ||
230 | exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size; | |
231 | exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size; | |
232 | exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size; | |
233 | exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); | |
234 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
235 | exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * | |
9deaaaf1 | 236 | sizeof (struct relocation_info)); |
2f88343d | 237 | exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * |
9deaaaf1 | 238 | sizeof (struct relocation_info)); |
2f88343d KH |
239 | |
240 | exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; | |
241 | exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; | |
242 | exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; | |
243 | ||
244 | exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; | |
245 | exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; | |
246 | ||
247 | bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); | |
248 | ||
2baa7d54 ILT |
249 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
250 | || (bfd_write ((PTR) & swapped_hdr, 1, EXEC_BYTES_SIZE, abfd) | |
251 | != EXEC_BYTES_SIZE)) | |
252 | return false; | |
2f88343d KH |
253 | |
254 | /* Now write out reloc info, followed by syms and strings */ | |
9deaaaf1 | 255 | if (bfd_get_symcount (abfd) != 0) |
2f88343d | 256 | { |
2baa7d54 ILT |
257 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET) |
258 | != 0) | |
259 | return false; | |
2f88343d | 260 | |
9deaaaf1 | 261 | if (!aout_32_write_syms (abfd)) |
2f88343d KH |
262 | return false; |
263 | ||
2baa7d54 ILT |
264 | if (bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET) |
265 | != 0) | |
266 | return false; | |
2f88343d | 267 | |
9deaaaf1 ILT |
268 | if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) |
269 | return false; | |
2baa7d54 ILT |
270 | if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET) |
271 | != 0) | |
272 | return false; | |
2f88343d | 273 | |
9deaaaf1 ILT |
274 | if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) |
275 | return false; | |
2f88343d KH |
276 | } |
277 | return true; | |
278 | } | |
279 | \f | |
280 | static boolean | |
281 | os9k_set_section_contents (abfd, section, location, offset, count) | |
282 | bfd *abfd; | |
283 | sec_ptr section; | |
284 | unsigned char *location; | |
285 | file_ptr offset; | |
9deaaaf1 | 286 | int count; |
2f88343d KH |
287 | { |
288 | ||
9deaaaf1 ILT |
289 | if (abfd->output_has_begun == false) |
290 | { /* set by bfd.c handler */ | |
291 | if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*|| | |
292 | (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/ ) | |
293 | { | |
294 | bfd_set_error (bfd_error_invalid_operation); | |
295 | return false; | |
296 | } | |
2f88343d | 297 | |
9deaaaf1 ILT |
298 | obj_textsec (abfd)->filepos = sizeof (struct internal_exec); |
299 | obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos | |
300 | + obj_textsec (abfd)->_raw_size; | |
2f88343d | 301 | |
9deaaaf1 | 302 | } |
2f88343d | 303 | /* regardless, once we know what we're doing, we might as well get going */ |
2baa7d54 ILT |
304 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) |
305 | return false; | |
2f88343d | 306 | |
9deaaaf1 ILT |
307 | if (count != 0) |
308 | { | |
309 | return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false; | |
310 | } | |
2f88343d KH |
311 | return true; |
312 | } | |
9deaaaf1 | 313 | #endif /* 0 */ |
2f88343d | 314 | |
9deaaaf1 ILT |
315 | static int |
316 | os9k_sizeof_headers (ignore_abfd, ignore) | |
317 | bfd *ignore_abfd; | |
318 | boolean ignore; | |
2f88343d | 319 | { |
9deaaaf1 | 320 | return sizeof (struct internal_exec); |
2f88343d KH |
321 | } |
322 | ||
323 | ||
324 | /***********************************************************************/ | |
325 | ||
5c8444f8 | 326 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info |
2f88343d | 327 | |
6812b607 ILT |
328 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
329 | ||
330 | #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup | |
331 | ||
332 | #define os9k_bfd_get_relocated_section_contents \ | |
333 | bfd_generic_get_relocated_section_contents | |
334 | #define os9k_bfd_relax_section bfd_generic_relax_section | |
335 | #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
336 | #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
337 | #define os9k_bfd_final_link _bfd_generic_final_link | |
338 | ||
2f88343d KH |
339 | bfd_target i386os9k_vec = |
340 | { | |
9deaaaf1 | 341 | "i386os9k", /* name */ |
2f88343d | 342 | bfd_target_os9k_flavour, |
9deaaaf1 ILT |
343 | false, /* data byte order is little */ |
344 | false, /* hdr byte order is big */ | |
2f88343d | 345 | (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ |
9deaaaf1 ILT |
346 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ |
347 | 0, /* symbol leading char */ | |
348 | ' ', /* ar_pad_char */ | |
349 | 16, /* ar_max_namelen */ | |
350 | 2, /* minumum alignment power */ | |
2f88343d KH |
351 | |
352 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
9deaaaf1 ILT |
353 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
354 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2f88343d | 355 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
9deaaaf1 ILT |
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 */ | |
2f88343d | 359 | bfd_generic_archive_p, _bfd_dummy_target}, |
9deaaaf1 | 360 | {bfd_false, bfd_false, /* bfd_set_format */ |
2f88343d | 361 | _bfd_generic_mkarchive, bfd_false}, |
9deaaaf1 | 362 | {bfd_false, bfd_false, /* bfd_write_contents */ |
2f88343d KH |
363 | _bfd_write_archive_contents, bfd_false}, |
364 | ||
6812b607 ILT |
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), | |
dfc1c006 | 373 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
6812b607 | 374 | |
2f88343d KH |
375 | (PTR) 0, |
376 | }; |