* som.c (hppa_som_gen_reloc_type): Choose a reasonable field
[deliverable/binutils-gdb.git] / bfd / i386os9k.c
CommitLineData
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
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, 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
29static 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 33boolean
9deaaaf1
ILT
34os9k_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;
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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
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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);
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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);
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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
76PROTO (void, os9k_swap_exec_header_out,
77 (bfd * abfd,
78 struct internal_exec * execp,
79 struct mh_com * raw_bytes));
2f88343d 80void
9deaaaf1
ILT
81os9k_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;
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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);
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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);
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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
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106
107static bfd_target *
108os9k_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
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119 return 0;
120 }
2f88343d
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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
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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
142static bfd_target *
143os9k_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
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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;
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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
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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
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183
184 return abfd->xvec;
185}
186
187#if 0
9deaaaf1
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188struct bout_data_struct
189{
190 struct aoutdata a;
191 struct internal_exec e;
2f88343d
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192};
193
194static boolean
195os9k_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
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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
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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
222static boolean
223os9k_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
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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
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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
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276 }
277 return true;
278}
279\f
280static boolean
281os9k_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
315static int
316os9k_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
339bfd_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
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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};
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