Commit | Line | Data |
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cd8761e1 | 1 | /* obj-format for ieee-695 records. |
01170860 | 2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
355afbcd | 3 | |
a39116f1 | 4 | This file is part of GAS, the GNU Assembler. |
355afbcd | 5 | |
a39116f1 RP |
6 | GAS 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, or (at your option) | |
9 | any later version. | |
355afbcd | 10 | |
a39116f1 RP |
11 | GAS 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. | |
355afbcd | 15 | |
a39116f1 RP |
16 | You should have received a copy of the GNU General Public License |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
cd8761e1 SC |
19 | |
20 | ||
355afbcd | 21 | /* |
cd8761e1 | 22 | created by |
355afbcd | 23 | |
cd8761e1 | 24 | steve chamberlain steve@cygnus.com |
a39116f1 | 25 | */ |
cd8761e1 SC |
26 | |
27 | /* | |
a39116f1 RP |
28 | this will hopefully become the port through which bfd and gas talk, |
29 | for the moment, only ieee is known to work well. | |
30 | */ | |
cd8761e1 SC |
31 | |
32 | #include "bfd.h" | |
33 | #include "as.h" | |
34 | #include "subsegs.h" | |
35 | #include "output-file.h" | |
36 | #include "frags.h" | |
37 | ||
38 | bfd *abfd; | |
39 | ||
40 | /* How many addresses does the .align take? */ | |
355afbcd KR |
41 | static relax_addressT |
42 | relax_align (address, alignment) | |
43 | register relax_addressT address; /* Address now. */ | |
44 | register long alignment; /* Alignment (binary). */ | |
45 | { | |
46 | relax_addressT mask; | |
47 | relax_addressT new_address; | |
48 | ||
49 | mask = ~((~0) << alignment); | |
50 | new_address = (address + mask) & (~mask); | |
51 | return (new_address - address); | |
52 | } /* relax_align() */ | |
cd8761e1 SC |
53 | |
54 | /* calculate the size of the frag chain and create a bfd section | |
55 | to contain all of it */ | |
355afbcd KR |
56 | static void |
57 | DEFUN (size_section, (abfd, idx), | |
58 | bfd * abfd AND | |
59 | unsigned int idx) | |
60 | { | |
61 | asection *sec; | |
62 | unsigned int size = 0; | |
63 | fragS *frag = segment_info[idx].frag_root; | |
64 | while (frag) | |
65 | { | |
66 | if (frag->fr_address != size) | |
67 | { | |
68 | printf ("Out of step\n"); | |
69 | size = frag->fr_address; | |
a39116f1 | 70 | } |
355afbcd KR |
71 | size += frag->fr_fix; |
72 | switch (frag->fr_type) | |
73 | { | |
74 | case rs_fill: | |
75 | case rs_org: | |
76 | size += frag->fr_offset * frag->fr_var; | |
77 | break; | |
78 | case rs_align: | |
79 | size += relax_align (size, frag->fr_offset); | |
a39116f1 | 80 | } |
355afbcd KR |
81 | frag = frag->fr_next; |
82 | } | |
83 | if (size) | |
84 | { | |
85 | char *name = segment_info[idx].name; | |
86 | if (name == (char *) NULL) | |
87 | { | |
88 | name = ".data"; | |
89 | } | |
90 | segment_info[idx].user_stuff = (char *) (sec = bfd_make_section (abfd, name)); | |
91 | /* Make it output through itself */ | |
92 | sec->output_section = sec; | |
93 | sec->flags |= SEC_HAS_CONTENTS; | |
94 | bfd_set_section_size (abfd, sec, size); | |
95 | } | |
cd8761e1 SC |
96 | } |
97 | ||
98 | /* run through a frag chain and write out the data to go with it */ | |
355afbcd KR |
99 | static void |
100 | DEFUN (fill_section, (abfd, idx), | |
101 | bfd * abfd AND | |
102 | unsigned int idx) | |
103 | { | |
104 | asection *sec = segment_info[idx].user_stuff; | |
105 | if (sec) | |
106 | { | |
107 | fragS *frag = segment_info[idx].frag_root; | |
108 | unsigned int offset = 0; | |
109 | while (frag) | |
110 | { | |
111 | unsigned int fill_size; | |
112 | unsigned int count; | |
113 | switch (frag->fr_type) | |
114 | { | |
115 | case rs_fill: | |
116 | case rs_align: | |
117 | case rs_org: | |
118 | if (frag->fr_fix) | |
119 | { | |
120 | bfd_set_section_contents (abfd, | |
121 | sec, | |
122 | frag->fr_literal, | |
123 | frag->fr_address, | |
124 | frag->fr_fix); | |
a39116f1 | 125 | } |
355afbcd KR |
126 | offset += frag->fr_fix; |
127 | fill_size = frag->fr_var; | |
128 | if (fill_size) | |
129 | { | |
130 | unsigned int off = frag->fr_fix; | |
131 | for (count = frag->fr_offset; count; count--) | |
132 | { | |
133 | bfd_set_section_contents (abfd, sec, | |
134 | frag->fr_literal + | |
135 | frag->fr_fix, | |
136 | frag->fr_address + off, | |
137 | fill_size); | |
138 | off += fill_size; | |
139 | } | |
140 | } | |
141 | break; | |
142 | default: | |
143 | abort (); | |
144 | } | |
145 | frag = frag->fr_next; | |
a39116f1 | 146 | } |
355afbcd | 147 | } |
cd8761e1 SC |
148 | } |
149 | ||
150 | /* Count the relocations in a chain */ | |
151 | ||
355afbcd KR |
152 | static unsigned int |
153 | DEFUN (count_entries_in_chain, (idx), | |
154 | unsigned int idx) | |
cd8761e1 | 155 | { |
355afbcd KR |
156 | unsigned int nrelocs; |
157 | fixS *fixup_ptr; | |
158 | ||
159 | /* Count the relocations */ | |
160 | fixup_ptr = segment_info[idx].fix_root; | |
161 | nrelocs = 0; | |
162 | while (fixup_ptr != (fixS *) NULL) | |
163 | { | |
164 | fixup_ptr = fixup_ptr->fx_next; | |
165 | nrelocs++; | |
166 | } | |
167 | return nrelocs; | |
cd8761e1 SC |
168 | } |
169 | ||
170 | /* output all the relocations for a section */ | |
355afbcd KR |
171 | void |
172 | DEFUN (do_relocs_for, (idx), | |
173 | unsigned int idx) | |
174 | { | |
175 | unsigned int nrelocs; | |
176 | arelent **reloc_ptr_vector; | |
177 | arelent *reloc_vector; | |
178 | asymbol **ptrs; | |
179 | asection *section = (asection *) (segment_info[idx].user_stuff); | |
180 | unsigned int i; | |
181 | fixS *from; | |
182 | if (section) | |
183 | { | |
184 | nrelocs = count_entries_in_chain (idx); | |
185 | ||
186 | reloc_ptr_vector = (arelent **) malloc ((nrelocs + 1) * sizeof (arelent *)); | |
187 | reloc_vector = (arelent *) malloc (nrelocs * sizeof (arelent)); | |
188 | ptrs = (asymbol **) malloc (nrelocs * sizeof (asymbol *)); | |
189 | from = segment_info[idx].fix_root; | |
190 | for (i = 0; i < nrelocs; i++) | |
191 | { | |
192 | arelent *to = reloc_vector + i; | |
193 | asymbol *s; | |
194 | reloc_ptr_vector[i] = to; | |
195 | to->howto = (reloc_howto_type *) (from->fx_r_type); | |
196 | ||
c1b625be KR |
197 | #if 0 /* We can't represent complicated things in a reloc yet */ |
198 | if (from->fx_addsy == 0 || from->fx_subsy != 0) abort(); | |
199 | #endif | |
200 | ||
355afbcd KR |
201 | s = &(from->fx_addsy->sy_symbol.sy); |
202 | to->address = ((char *) (from->fx_frag->fr_address + | |
203 | from->fx_where)) | |
204 | - ((char *) (&(from->fx_frag->fr_literal))); | |
205 | to->addend = from->fx_offset; | |
c1b625be KR |
206 | /* If we know the symbol which we want to relocate to, turn |
207 | this reloaction into a section relative. | |
208 | ||
209 | If this relocation is pcrelative, and we know the | |
210 | destination, we still want to keep the relocation - since | |
211 | the linker might relax some of the bytes, but it stops | |
212 | being pc relative and turns into an absolute relocation. */ | |
355afbcd KR |
213 | if (s) |
214 | { | |
215 | if ((s->flags & BSF_UNDEFINED) == 0) | |
216 | { | |
217 | to->section = s->section; | |
85051959 ILT |
218 | |
219 | /* We can refer directly to the value field here, | |
220 | rather than using S_GET_VALUE, because this is | |
221 | only called after do_symbols, which sets up the | |
222 | value field. */ | |
355afbcd | 223 | to->addend += s->value; |
85051959 | 224 | |
355afbcd KR |
225 | to->sym_ptr_ptr = 0; |
226 | if (to->howto->pcrel_offset) | |
227 | { | |
228 | /* This is a pcrel relocation, the addend should be adjusted */ | |
229 | to->addend -= to->address + 1; | |
a39116f1 | 230 | } |
355afbcd KR |
231 | } |
232 | else | |
233 | { | |
234 | to->section = 0; | |
235 | *ptrs = &(from->fx_addsy->sy_symbol.sy); | |
236 | to->sym_ptr_ptr = ptrs; | |
237 | ||
238 | if (to->howto->pcrel_offset) | |
239 | { | |
240 | /* This is a pcrel relocation, the addend should be adjusted */ | |
241 | to->addend -= to->address - 1; | |
242 | } | |
243 | } | |
244 | ||
245 | } | |
246 | else | |
247 | { | |
248 | to->section = 0; | |
249 | } | |
250 | ||
251 | ptrs++; | |
252 | from = from->fx_next; | |
253 | } | |
254 | ||
255 | /* attatch to the section */ | |
256 | section->orelocation = reloc_ptr_vector; | |
257 | section->reloc_count = nrelocs; | |
258 | section->flags |= SEC_LOAD; | |
259 | } | |
cd8761e1 SC |
260 | } |
261 | ||
262 | /* do the symbols.. */ | |
355afbcd KR |
263 | static void |
264 | DEFUN (do_symbols, (abfd), | |
265 | bfd * abfd) | |
266 | { | |
267 | extern symbolS *symbol_rootP; | |
268 | symbolS *ptr; | |
269 | asymbol **symbol_ptr_vec; | |
270 | asymbol *symbol_vec; | |
271 | unsigned int count = 0; | |
272 | unsigned int index; | |
273 | ||
274 | ||
275 | for (ptr = symbol_rootP; | |
276 | ptr != (symbolS *) NULL; | |
277 | ptr = ptr->sy_next) | |
278 | { | |
279 | if (SEG_NORMAL (ptr->sy_symbol.seg)) | |
280 | { | |
281 | ptr->sy_symbol.sy.section = | |
282 | (asection *) (segment_info[ptr->sy_symbol.seg].user_stuff); | |
85051959 | 283 | S_SET_VALUE (ptr, S_GET_VALUE (ptr) + ptr->sy_frag->fr_address); |
355afbcd | 284 | if (ptr->sy_symbol.sy.flags == 0) |
cd8761e1 | 285 | { |
355afbcd | 286 | ptr->sy_symbol.sy.flags = BSF_LOCAL; |
cd8761e1 | 287 | } |
355afbcd KR |
288 | } |
289 | else | |
290 | { | |
291 | switch (ptr->sy_symbol.seg) | |
a39116f1 | 292 | { |
355afbcd KR |
293 | case SEG_ABSOLUTE: |
294 | ptr->sy_symbol.sy.flags |= BSF_ABSOLUTE; | |
295 | ptr->sy_symbol.sy.section = 0; | |
296 | break; | |
297 | case SEG_UNKNOWN: | |
298 | ptr->sy_symbol.sy.flags = BSF_UNDEFINED; | |
299 | ptr->sy_symbol.sy.section = 0; | |
300 | break; | |
301 | default: | |
302 | abort (); | |
a39116f1 | 303 | } |
355afbcd | 304 | } |
85051959 | 305 | ptr->sy_symbol.sy.value = S_GET_VALUE (ptr); |
355afbcd KR |
306 | count++; |
307 | } | |
308 | symbol_ptr_vec = (asymbol **) malloc ((count + 1) * sizeof (asymbol *)); | |
309 | ||
310 | index = 0; | |
311 | for (ptr = symbol_rootP; | |
312 | ptr != (symbolS *) NULL; | |
313 | ptr = ptr->sy_next) | |
314 | { | |
315 | symbol_ptr_vec[index] = &(ptr->sy_symbol.sy); | |
316 | index++; | |
317 | } | |
318 | symbol_ptr_vec[index] = 0; | |
319 | abfd->outsymbols = symbol_ptr_vec; | |
320 | abfd->symcount = count; | |
cd8761e1 SC |
321 | } |
322 | ||
323 | /* The generic as->bfd converter. Other backends may have special case | |
324 | code */ | |
325 | ||
355afbcd KR |
326 | void |
327 | DEFUN_VOID (bfd_as_write_hook) | |
cd8761e1 | 328 | { |
355afbcd KR |
329 | int i; |
330 | ||
331 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
332 | { | |
333 | size_section (abfd, i); | |
334 | } | |
335 | ||
336 | ||
337 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
338 | fill_section (abfd, i); | |
339 | ||
340 | do_symbols (abfd); | |
341 | ||
342 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
343 | do_relocs_for (i); | |
344 | ||
cd8761e1 SC |
345 | } |
346 | ||
355afbcd KR |
347 | S_SET_SEGMENT (x, y) |
348 | symbolS *x; | |
349 | int y; | |
350 | { | |
351 | x->sy_symbol.seg = y; | |
cd8761e1 SC |
352 | } |
353 | ||
355afbcd KR |
354 | S_IS_DEFINED (x) |
355 | symbolS *x; | |
cd8761e1 | 356 | { |
355afbcd KR |
357 | if (SEG_NORMAL (x->sy_symbol.seg)) |
358 | { | |
359 | return 1; | |
360 | } | |
361 | switch (x->sy_symbol.seg) | |
362 | { | |
363 | case SEG_UNKNOWN: | |
364 | return 0; | |
365 | default: | |
366 | abort (); | |
367 | } | |
368 | } | |
369 | ||
370 | S_IS_EXTERNAL (x) | |
371 | { | |
372 | abort (); | |
cd8761e1 SC |
373 | } |
374 | ||
355afbcd KR |
375 | S_GET_DESC (x) |
376 | { | |
377 | abort (); | |
378 | } | |
379 | ||
380 | S_GET_SEGMENT (x) | |
381 | symbolS *x; | |
382 | { | |
383 | return x->sy_symbol.seg; | |
384 | } | |
cd8761e1 | 385 | |
355afbcd KR |
386 | S_SET_EXTERNAL (x) |
387 | symbolS *x; | |
388 | { | |
389 | x->sy_symbol.sy.flags |= BSF_GLOBAL | BSF_EXPORT; | |
390 | } | |
cd8761e1 | 391 | |
355afbcd KR |
392 | S_SET_NAME (x, y) |
393 | symbolS *x; | |
394 | char *y; | |
cd8761e1 | 395 | { |
355afbcd | 396 | x->sy_symbol.sy.name = y; |
cd8761e1 SC |
397 | } |
398 | ||
355afbcd KR |
399 | S_GET_OTHER (x) |
400 | { | |
401 | abort (); | |
cd8761e1 SC |
402 | } |
403 | ||
355afbcd KR |
404 | S_IS_DEBUG (x) |
405 | { | |
406 | abort (); | |
407 | } | |
cd8761e1 | 408 | |
355afbcd KR |
409 | char * |
410 | segment_name () | |
411 | { | |
412 | abort (); | |
413 | } | |
cd8761e1 | 414 | |
355afbcd KR |
415 | void |
416 | obj_read_begin_hook () | |
417 | { | |
418 | } | |
cd8761e1 | 419 | |
355afbcd KR |
420 | static void |
421 | obj_ieee_section (ignore) | |
422 | int ignore; | |
cd8761e1 | 423 | { |
355afbcd KR |
424 | extern char *input_line_pointer; |
425 | extern char is_end_of_line[]; | |
426 | char *p = input_line_pointer; | |
427 | char *s = p; | |
428 | int i; | |
429 | /* Look up the name, if it doesn't exist, make it */ | |
430 | while (*p && *p != ' ' && *p != ',' && !is_end_of_line[*p]) | |
431 | { | |
432 | p++; | |
433 | } | |
434 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
435 | { | |
436 | if (segment_info[i].hadone) | |
437 | { | |
438 | if (strncmp (segment_info[i].name, s, p - s) == 0) | |
439 | { | |
440 | goto ok; | |
441 | ||
442 | } | |
a39116f1 | 443 | } |
355afbcd KR |
444 | else |
445 | break; | |
446 | } | |
447 | if (i == SEG_UNKNOWN) | |
448 | { | |
449 | as_bad ("too many sections"); | |
450 | return; | |
451 | } | |
452 | ||
453 | segment_info[i].hadone = 1; | |
454 | segment_info[i].name = malloc (p - s + 1); | |
455 | memcpy (segment_info[i].name, s, p - s); | |
456 | segment_info[i].name[p - s] = 0; | |
457 | ok: | |
604633ae | 458 | subseg_set (i, 0); |
355afbcd KR |
459 | while (!is_end_of_line[*p]) |
460 | p++; | |
461 | input_line_pointer = p; | |
462 | ||
cd8761e1 SC |
463 | } |
464 | ||
465 | ||
355afbcd KR |
466 | void cons (); |
467 | void s_ignore (); | |
cd8761e1 SC |
468 | |
469 | ||
355afbcd KR |
470 | void s_globl (); |
471 | const pseudo_typeS obj_pseudo_table[] = | |
472 | { | |
473 | {"section", obj_ieee_section, 0}, | |
474 | {"data.b", cons, 1}, | |
475 | {"data.w", cons, 2}, | |
476 | {"data.l", cons, 4}, | |
477 | {"export", s_globl, 0}, | |
478 | {"option", s_ignore, 0}, | |
479 | {"end", s_ignore, 0}, | |
480 | {"import", s_ignore, 0}, | |
481 | {"sdata", stringer, 0}, | |
482 | 0, | |
483 | ||
cd8761e1 SC |
484 | }; |
485 | ||
486 | ||
487 | ||
355afbcd KR |
488 | void |
489 | obj_symbol_new_hook (symbolP) | |
490 | symbolS *symbolP; | |
cd8761e1 | 491 | { |
355afbcd | 492 | symbolP->sy_symbol.sy.the_bfd = abfd; |
cd8761e1 SC |
493 | } |
494 | ||
495 | ||
496 | ||
497 | ||
498 | ||
499 | #if 1 | |
355afbcd KR |
500 | extern void |
501 | DEFUN_VOID (write_object_file) | |
502 | { | |
503 | int i; | |
504 | struct frchain *frchain_ptr; | |
505 | struct frag *frag_ptr; | |
506 | ||
507 | abfd = bfd_openw (out_file_name, "ieee"); | |
508 | ||
509 | if (abfd == 0) | |
510 | { | |
511 | as_perror ("FATAL: Can't create %s", out_file_name); | |
512 | exit (42); | |
513 | } | |
514 | bfd_set_format (abfd, bfd_object); | |
515 | bfd_set_arch_mach (abfd, bfd_arch_h8300, 0); | |
604633ae ILT |
516 | subseg_set (1, 0); |
517 | subseg_set (2, 0); | |
518 | subseg_set (3, 0); | |
355afbcd KR |
519 | for (frchain_ptr = frchain_root; |
520 | frchain_ptr != (struct frchain *) NULL; | |
521 | frchain_ptr = frchain_ptr->frch_next) | |
522 | { | |
523 | /* Run through all the sub-segments and align them up. Also close any | |
2492e118 KR |
524 | open frags. We tack a .fill onto the end of the frag chain so |
525 | that any .align's size can be worked by looking at the next | |
526 | frag. */ | |
355afbcd | 527 | |
604633ae | 528 | subseg_set (frchain_ptr->frch_seg, frchain_ptr->frch_subseg); |
3eb802b5 | 529 | #ifndef SUB_SEGMENT_ALIGN |
2492e118 | 530 | #define SUB_SEGMENT_ALIGN(SEG) 2 |
3eb802b5 | 531 | #endif |
2492e118 | 532 | frag_align (SUB_SEGMENT_ALIGN (now_seg), 0); |
355afbcd KR |
533 | frag_wane (frag_now); |
534 | frag_now->fr_fix = 0; | |
535 | know (frag_now->fr_next == NULL); | |
536 | } | |
537 | ||
538 | /* Now build one big frag chain for each segment, linked through | |
a39116f1 | 539 | fr_next. */ |
355afbcd KR |
540 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) |
541 | { | |
542 | ||
543 | fragS **prev_frag_ptr_ptr; | |
544 | struct frchain *next_frchain_ptr; | |
545 | ||
546 | /* struct frag **head_ptr = segment_info[i].frag_root;*/ | |
547 | ||
548 | segment_info[i].frag_root = segment_info[i].frchainP->frch_root; | |
cd8761e1 | 549 | #if 0 |
355afbcd KR |
550 | /* Im not sure what this is for */ |
551 | for (frchain_ptr = segment_info[i].frchainP->frch_root; | |
552 | frchain_ptr != (struct frchain *) NULL; | |
553 | frchain_ptr = frchain_ptr->frch_next) | |
554 | { | |
555 | *head_ptr = frchain_ptr; | |
556 | head_ptr = &frchain_ptr->next; | |
a39116f1 | 557 | } |
355afbcd KR |
558 | |
559 | ||
560 | #endif | |
561 | } | |
562 | ||
563 | for (i = SEG_E0; i < SEG_UNKNOWN; i++) | |
564 | { | |
565 | relax_segment (segment_info[i].frag_root, i); | |
566 | } | |
567 | ||
568 | /* Now the addresses of the frags are correct within the segment */ | |
569 | ||
570 | bfd_as_write_hook (); | |
571 | bfd_close (abfd); | |
cd8761e1 SC |
572 | } |
573 | ||
574 | #endif | |
575 | ||
355afbcd KR |
576 | H_SET_TEXT_SIZE (a, b) |
577 | { | |
578 | abort (); | |
579 | } | |
580 | ||
581 | H_GET_TEXT_SIZE () | |
582 | { | |
583 | abort (); | |
584 | } | |
585 | ||
586 | H_SET_BSS_SIZE () | |
587 | { | |
588 | abort (); | |
589 | } | |
590 | ||
591 | H_SET_STRING_SIZE () | |
592 | { | |
593 | abort (); | |
594 | } | |
595 | ||
596 | H_SET_RELOCATION_SIZE () | |
597 | { | |
598 | abort (); | |
599 | } | |
600 | ||
601 | H_SET_MAGIC_NUMBER () | |
602 | { | |
603 | abort (); | |
604 | } | |
605 | ||
606 | H_GET_FILE_SIZE () | |
607 | { | |
608 | abort (); | |
609 | } | |
610 | ||
611 | H_GET_TEXT_RELOCATION_SIZE () | |
612 | { | |
613 | abort (); | |
614 | } | |
a39116f1 RP |
615 | |
616 | /* end of obj-ieee.c */ |