Commit | Line | Data |
---|---|---|
49864cfa KR |
1 | /* ELF object file format |
2 | Copyright (C) 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as | |
8 | published by the Free Software Foundation; either version 2, | |
9 | or (at your option) any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
14 | the GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public | |
17 | License along with GAS; see the file COPYING. If not, write | |
18 | to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
49864cfa | 20 | #include "as.h" |
6e378515 | 21 | #include "subsegs.h" |
49864cfa KR |
22 | #include "obstack.h" |
23 | ||
c5953036 ILT |
24 | #ifdef ECOFF_DEBUGGING |
25 | #include "ecoff.h" | |
26 | #endif | |
27 | ||
604633ae ILT |
28 | static int obj_elf_write_symbol_p PARAMS ((symbolS *sym)); |
29 | ||
c5953036 ILT |
30 | #ifdef ECOFF_DEBUGGING |
31 | static boolean elf_get_extr PARAMS ((asymbol *, EXTR *)); | |
32 | static void elf_set_index PARAMS ((asymbol *, bfd_size_type)); | |
33 | #endif | |
34 | ||
604633ae | 35 | static void obj_elf_line PARAMS ((int)); |
604633ae ILT |
36 | void obj_elf_version PARAMS ((int)); |
37 | static void obj_elf_size PARAMS ((int)); | |
38 | static void obj_elf_type PARAMS ((int)); | |
39 | static void obj_elf_ident PARAMS ((int)); | |
40 | static void obj_elf_weak PARAMS ((int)); | |
41 | static void obj_elf_local PARAMS ((int)); | |
42 | static void obj_elf_common PARAMS ((int)); | |
13998021 ILT |
43 | static void obj_elf_data PARAMS ((int)); |
44 | static void obj_elf_text PARAMS ((int)); | |
49864cfa | 45 | |
6e378515 KR |
46 | const pseudo_typeS obj_pseudo_table[] = |
47 | { | |
d7852a33 | 48 | {"comm", obj_elf_common, 0}, |
6e378515 | 49 | {"ident", obj_elf_ident, 0}, |
d7852a33 | 50 | {"local", obj_elf_local, 0}, |
7c05f0ec | 51 | {"previous", obj_elf_previous, 0}, |
6e378515 KR |
52 | {"section", obj_elf_section, 0}, |
53 | {"size", obj_elf_size, 0}, | |
54 | {"type", obj_elf_type, 0}, | |
55 | {"version", obj_elf_version, 0}, | |
b81b8a7d | 56 | {"weak", obj_elf_weak, 0}, |
6e378515 KR |
57 | |
58 | /* These are used for stabs-in-elf configurations. */ | |
6e378515 | 59 | {"line", obj_elf_line, 0}, |
6e378515 | 60 | |
7c05f0ec KR |
61 | /* These are used for dwarf. */ |
62 | {"2byte", cons, 2}, | |
63 | {"4byte", cons, 4}, | |
b81b8a7d | 64 | {"8byte", cons, 8}, |
7c05f0ec | 65 | |
13998021 ILT |
66 | /* We need to trap the section changing calls to handle .previous. */ |
67 | {"data", obj_elf_data, 0}, | |
68 | {"text", obj_elf_text, 0}, | |
69 | ||
c5953036 ILT |
70 | #ifdef ECOFF_DEBUGGING |
71 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
72 | is used instead. */ | |
73 | { "def", ecoff_directive_def, 0 }, | |
74 | { "dim", ecoff_directive_dim, 0 }, | |
75 | { "endef", ecoff_directive_endef, 0 }, | |
76 | { "file", ecoff_directive_file, 0 }, | |
77 | { "scl", ecoff_directive_scl, 0 }, | |
78 | { "tag", ecoff_directive_tag, 0 }, | |
79 | { "val", ecoff_directive_val, 0 }, | |
80 | ||
81 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
82 | already has meanings for those. We use .esize and .etype | |
83 | instead. These are only generated by gcc anyhow. */ | |
84 | { "esize", ecoff_directive_size, 0 }, | |
85 | { "etype", ecoff_directive_type, 0 }, | |
86 | ||
87 | /* ECOFF specific debugging information. */ | |
88 | { "begin", ecoff_directive_begin, 0 }, | |
89 | { "bend", ecoff_directive_bend, 0 }, | |
90 | { "end", ecoff_directive_end, 0 }, | |
91 | { "ent", ecoff_directive_ent, 0 }, | |
92 | { "fmask", ecoff_directive_fmask, 0 }, | |
93 | { "frame", ecoff_directive_frame, 0 }, | |
94 | { "loc", ecoff_directive_loc, 0 }, | |
95 | { "mask", ecoff_directive_mask, 0 }, | |
96 | ||
97 | /* These are used on Irix. I don't know how to implement them. */ | |
98 | { "alias", s_ignore, 0 }, | |
99 | { "bgnb", s_ignore, 0 }, | |
100 | { "endb", s_ignore, 0 }, | |
101 | { "lab", s_ignore, 0 }, | |
102 | { "noalias", s_ignore, 0 }, | |
103 | { "verstamp", s_ignore, 0 }, | |
104 | { "vreg", s_ignore, 0 }, | |
105 | #endif /* ECOFF_DEBUGGING */ | |
106 | ||
6e378515 | 107 | {NULL} /* end sentinel */ |
49864cfa KR |
108 | }; |
109 | ||
b81b8a7d | 110 | #undef NO_RELOC |
6e378515 KR |
111 | #include "aout/aout64.h" |
112 | ||
113 | void | |
114 | elf_file_symbol (s) | |
115 | char *s; | |
116 | { | |
117 | symbolS *sym; | |
118 | ||
119 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
120 | sym->sy_frag = &zero_address_frag; | |
121 | sym->bsym->flags |= BSF_FILE; | |
122 | ||
123 | if (symbol_rootP != sym) | |
124 | { | |
125 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
126 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
127 | #ifdef DEBUG | |
128 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
129 | #endif | |
130 | } | |
131 | } | |
132 | ||
d7852a33 | 133 | static void |
604633ae ILT |
134 | obj_elf_common (ignore) |
135 | int ignore; | |
d7852a33 KR |
136 | { |
137 | char *name; | |
138 | char c; | |
139 | char *p; | |
140 | int temp, size; | |
141 | symbolS *symbolP; | |
fa20b8bf | 142 | int have_align; |
d7852a33 KR |
143 | |
144 | name = input_line_pointer; | |
145 | c = get_symbol_end (); | |
146 | /* just after name is now '\0' */ | |
147 | p = input_line_pointer; | |
148 | *p = c; | |
149 | SKIP_WHITESPACE (); | |
150 | if (*input_line_pointer != ',') | |
151 | { | |
152 | as_bad ("Expected comma after symbol-name"); | |
153 | ignore_rest_of_line (); | |
154 | return; | |
155 | } | |
156 | input_line_pointer++; /* skip ',' */ | |
157 | if ((temp = get_absolute_expression ()) < 0) | |
158 | { | |
159 | as_bad (".COMMon length (%d.) <0! Ignored.", temp); | |
160 | ignore_rest_of_line (); | |
161 | return; | |
162 | } | |
163 | size = temp; | |
164 | *p = 0; | |
165 | symbolP = symbol_find_or_make (name); | |
166 | *p = c; | |
167 | if (S_IS_DEFINED (symbolP)) | |
168 | { | |
169 | as_bad ("Ignoring attempt to re-define symbol"); | |
170 | ignore_rest_of_line (); | |
171 | return; | |
172 | } | |
173 | if (S_GET_VALUE (symbolP) != 0) | |
174 | { | |
175 | if (S_GET_VALUE (symbolP) != size) | |
176 | { | |
177 | as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.", | |
178 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
179 | } | |
180 | } | |
181 | know (symbolP->sy_frag == &zero_address_frag); | |
182 | if (*input_line_pointer != ',') | |
fa20b8bf ILT |
183 | have_align = 0; |
184 | else | |
d7852a33 | 185 | { |
fa20b8bf ILT |
186 | have_align = 1; |
187 | input_line_pointer++; | |
188 | SKIP_WHITESPACE (); | |
d7852a33 | 189 | } |
fa20b8bf | 190 | if (! have_align || *input_line_pointer != '"') |
d7852a33 | 191 | { |
fa20b8bf ILT |
192 | if (! have_align) |
193 | temp = 0; | |
194 | else | |
d7852a33 | 195 | { |
fa20b8bf ILT |
196 | temp = get_absolute_expression (); |
197 | if (temp < 0) | |
198 | { | |
199 | temp = 0; | |
200 | as_warn ("Common alignment negative; 0 assumed"); | |
201 | } | |
d7852a33 KR |
202 | } |
203 | if (symbolP->local) | |
204 | { | |
205 | segT old_sec; | |
206 | int old_subsec; | |
604633ae | 207 | char *pfrag; |
d7852a33 KR |
208 | int align; |
209 | ||
58d4951d | 210 | /* allocate_bss: */ |
d7852a33 KR |
211 | old_sec = now_seg; |
212 | old_subsec = now_subseg; | |
213 | align = temp; | |
214 | record_alignment (bss_section, align); | |
215 | subseg_set (bss_section, 0); | |
216 | if (align) | |
217 | frag_align (align, 0); | |
218 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
219 | symbolP->sy_frag->fr_symbol = 0; | |
220 | symbolP->sy_frag = frag_now; | |
604633ae ILT |
221 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, |
222 | (char *) 0); | |
223 | *pfrag = 0; | |
d7852a33 KR |
224 | S_SET_SEGMENT (symbolP, bss_section); |
225 | S_CLEAR_EXTERNAL (symbolP); | |
226 | subseg_set (old_sec, old_subsec); | |
227 | } | |
228 | else | |
229 | { | |
230 | allocate_common: | |
604633ae | 231 | S_SET_VALUE (symbolP, (valueT) size); |
d7852a33 KR |
232 | S_SET_EXTERNAL (symbolP); |
233 | /* should be common, but this is how gas does it for now */ | |
234 | S_SET_SEGMENT (symbolP, &bfd_und_section); | |
235 | } | |
236 | } | |
237 | else | |
238 | { | |
239 | input_line_pointer++; | |
240 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
241 | if (*input_line_pointer == '.') | |
242 | input_line_pointer++; | |
243 | /* @@ Some say data, some say bss. */ | |
244 | if (strncmp (input_line_pointer, "bss\"", 4) | |
245 | && strncmp (input_line_pointer, "data\"", 5)) | |
246 | { | |
247 | while (*--input_line_pointer != '"') | |
248 | ; | |
249 | input_line_pointer--; | |
250 | goto bad_common_segment; | |
251 | } | |
252 | while (*input_line_pointer++ != '"') | |
253 | ; | |
254 | goto allocate_common; | |
255 | } | |
256 | demand_empty_rest_of_line (); | |
257 | return; | |
258 | ||
259 | { | |
260 | bad_common_segment: | |
261 | p = input_line_pointer; | |
262 | while (*p && *p != '\n') | |
263 | p++; | |
264 | c = *p; | |
265 | *p = '\0'; | |
266 | as_bad ("bad .common segment %s", input_line_pointer + 1); | |
267 | *p = c; | |
268 | input_line_pointer = p; | |
269 | ignore_rest_of_line (); | |
270 | return; | |
271 | } | |
272 | } | |
273 | ||
274 | static void | |
604633ae ILT |
275 | obj_elf_local (ignore) |
276 | int ignore; | |
d7852a33 KR |
277 | { |
278 | char *name; | |
279 | int c; | |
280 | symbolS *symbolP; | |
281 | ||
282 | do | |
283 | { | |
284 | name = input_line_pointer; | |
285 | c = get_symbol_end (); | |
286 | symbolP = symbol_find_or_make (name); | |
287 | *input_line_pointer = c; | |
288 | SKIP_WHITESPACE (); | |
289 | S_CLEAR_EXTERNAL (symbolP); | |
290 | symbolP->local = 1; | |
291 | if (c == ',') | |
292 | { | |
293 | input_line_pointer++; | |
294 | SKIP_WHITESPACE (); | |
295 | if (*input_line_pointer == '\n') | |
296 | c = '\n'; | |
297 | } | |
298 | } | |
299 | while (c == ','); | |
300 | demand_empty_rest_of_line (); | |
301 | } | |
302 | ||
b81b8a7d | 303 | static void |
604633ae ILT |
304 | obj_elf_weak (ignore) |
305 | int ignore; | |
b81b8a7d KR |
306 | { |
307 | char *name; | |
308 | int c; | |
309 | symbolS *symbolP; | |
310 | ||
311 | do | |
312 | { | |
313 | name = input_line_pointer; | |
314 | c = get_symbol_end (); | |
315 | symbolP = symbol_find_or_make (name); | |
316 | *input_line_pointer = c; | |
317 | SKIP_WHITESPACE (); | |
318 | S_SET_WEAK (symbolP); | |
319 | symbolP->local = 1; | |
320 | if (c == ',') | |
321 | { | |
322 | input_line_pointer++; | |
323 | SKIP_WHITESPACE (); | |
324 | if (*input_line_pointer == '\n') | |
325 | c = '\n'; | |
326 | } | |
327 | } | |
328 | while (c == ','); | |
329 | demand_empty_rest_of_line (); | |
330 | } | |
331 | ||
7c05f0ec KR |
332 | static segT previous_section; |
333 | static int previous_subsection; | |
334 | ||
fa20b8bf ILT |
335 | /* Handle the .section pseudo-op. This code supports two different |
336 | syntaxes. | |
337 | ||
338 | The first is found on Solaris, and looks like | |
339 | .section ".sec1",#alloc,#execinstr,#write | |
340 | Here the names after '#' are the SHF_* flags to turn on for the | |
341 | section. I'm not sure how it determines the SHT_* type (BFD | |
342 | doesn't really give us control over the type, anyhow). | |
343 | ||
344 | The second format is found on UnixWare, and probably most SVR4 | |
345 | machines, and looks like | |
346 | .section .sec1,"a",@progbits | |
347 | The quoted string may contain any combination of a, w, x, and | |
348 | represents the SHF_* flags to turn on for the section. The string | |
349 | beginning with '@' can be progbits or nobits. There should be | |
350 | other possibilities, but I don't know what they are. In any case, | |
351 | BFD doesn't really let us set the section type. */ | |
352 | ||
693b21e7 | 353 | void |
49864cfa KR |
354 | obj_elf_section (xxx) |
355 | int xxx; | |
356 | { | |
357 | char *string; | |
13998021 | 358 | int new_sec; |
fa20b8bf ILT |
359 | segT sec; |
360 | flagword flags; | |
49864cfa | 361 | |
b81b8a7d | 362 | /* Get name of section. */ |
fa20b8bf | 363 | SKIP_WHITESPACE (); |
7c05f0ec | 364 | if (*input_line_pointer == '"') |
fa20b8bf ILT |
365 | { |
366 | string = demand_copy_C_string (&xxx); | |
367 | if (string == NULL) | |
368 | { | |
369 | ignore_rest_of_line (); | |
370 | return; | |
371 | } | |
372 | } | |
7c05f0ec KR |
373 | else |
374 | { | |
375 | char *p = input_line_pointer; | |
376 | char c; | |
377 | while (0 == strchr ("\n\t,; ", *p)) | |
378 | p++; | |
fa20b8bf ILT |
379 | if (p == input_line_pointer) |
380 | { | |
381 | as_warn ("Missing section name"); | |
382 | ignore_rest_of_line (); | |
383 | return; | |
384 | } | |
7c05f0ec KR |
385 | c = *p; |
386 | *p = 0; | |
604633ae | 387 | string = xmalloc ((unsigned long) (p - input_line_pointer + 1)); |
7c05f0ec KR |
388 | strcpy (string, input_line_pointer); |
389 | *p = c; | |
390 | input_line_pointer = p; | |
391 | } | |
fa20b8bf ILT |
392 | |
393 | /* Switch to the section, creating it if necessary. */ | |
394 | previous_section = now_seg; | |
395 | previous_subsection = now_subseg; | |
396 | ||
397 | new_sec = bfd_get_section_by_name (stdoutput, string) == NULL; | |
398 | sec = subseg_new (string, 0); | |
399 | ||
400 | /* If this section already existed, we don't bother to change the | |
401 | flag values. */ | |
402 | if (! new_sec) | |
403 | { | |
404 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
405 | ++input_line_pointer; | |
406 | ++input_line_pointer; | |
407 | return; | |
408 | } | |
b81b8a7d | 409 | |
49864cfa KR |
410 | SKIP_WHITESPACE (); |
411 | if (*input_line_pointer != ',') | |
49864cfa | 412 | { |
fa20b8bf ILT |
413 | /* No flags given. Guess at some useful defaults. */ |
414 | if (strcmp (string, ".data") == 0 | |
415 | || strcmp (string, ".data1") == 0 | |
416 | || strcmp (string, ".sdata") == 0 | |
417 | || strcmp (string, ".rodata") == 0 | |
418 | || strcmp (string, ".rodata1") == 0) | |
419 | flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_RELOC | SEC_DATA; | |
420 | else if (strcmp (string, ".text") == 0 | |
421 | || strcmp (string, ".init") == 0 | |
422 | || strcmp (string, ".fini") == 0) | |
423 | flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_RELOC | SEC_CODE; | |
424 | else if (strcmp (string, ".bss") == 0 | |
425 | || strcmp (string, ".sbss") == 0) | |
426 | flags = SEC_ALLOC; | |
427 | else | |
428 | flags = SEC_RELOC; | |
429 | } | |
430 | else | |
431 | { | |
432 | /* Skip the comma. */ | |
433 | ++input_line_pointer; | |
b81b8a7d | 434 | |
fa20b8bf | 435 | SKIP_WHITESPACE (); |
b81b8a7d KR |
436 | if (*input_line_pointer == '"') |
437 | { | |
fa20b8bf ILT |
438 | /* Pick up a string with a combination of a, w, x. */ |
439 | flags = SEC_READONLY | SEC_RELOC; | |
440 | ++input_line_pointer; | |
441 | while (*input_line_pointer != '"') | |
442 | { | |
443 | switch (*input_line_pointer) | |
444 | { | |
445 | case 'a': | |
446 | flags |= SEC_ALLOC | SEC_LOAD; | |
447 | break; | |
448 | case 'w': | |
449 | flags &=~ SEC_READONLY; | |
450 | break; | |
451 | case 'x': | |
452 | flags |= SEC_CODE; | |
453 | break; | |
454 | default: | |
455 | as_warn ("Bad .section directive: want a,w,x in string"); | |
456 | ignore_rest_of_line (); | |
457 | return; | |
458 | } | |
459 | ++input_line_pointer; | |
460 | } | |
461 | ||
462 | /* Skip the closing quote. */ | |
463 | ++input_line_pointer; | |
464 | ||
b81b8a7d | 465 | SKIP_WHITESPACE (); |
fa20b8bf ILT |
466 | if (*input_line_pointer == ',') |
467 | { | |
468 | ++input_line_pointer; | |
469 | SKIP_WHITESPACE (); | |
470 | if (*input_line_pointer == '@') | |
471 | { | |
472 | ++input_line_pointer; | |
473 | if (strncmp (input_line_pointer, "progbits", | |
474 | sizeof "progbits" - 1) == 0) | |
475 | { | |
476 | flags |= SEC_ALLOC | SEC_LOAD; | |
477 | input_line_pointer += sizeof "progbits" - 1; | |
478 | } | |
479 | else if (strncmp (input_line_pointer, "nobits", | |
480 | sizeof "nobits" - 1) == 0) | |
481 | { | |
482 | flags &=~ SEC_LOAD; | |
483 | input_line_pointer += sizeof "nobits" - 1; | |
484 | } | |
485 | else | |
486 | { | |
487 | as_warn ("Unrecognized section type"); | |
488 | ignore_rest_of_line (); | |
489 | } | |
490 | } | |
491 | } | |
b81b8a7d | 492 | } |
fa20b8bf | 493 | else |
49864cfa | 494 | { |
fa20b8bf ILT |
495 | flags = SEC_READONLY | SEC_RELOC; |
496 | do | |
497 | { | |
498 | SKIP_WHITESPACE (); | |
499 | if (*input_line_pointer != '#') | |
500 | { | |
501 | as_warn ("Bad .section directive"); | |
502 | ignore_rest_of_line (); | |
503 | return; | |
504 | } | |
505 | ++input_line_pointer; | |
506 | if (strncmp (input_line_pointer, "write", | |
507 | sizeof "write" - 1) == 0) | |
508 | { | |
509 | flags &=~ SEC_READONLY; | |
510 | input_line_pointer += sizeof "write" - 1; | |
511 | } | |
512 | else if (strncmp (input_line_pointer, "alloc", | |
513 | sizeof "alloc" - 1) == 0) | |
514 | { | |
515 | flags |= SEC_ALLOC | SEC_LOAD; | |
516 | input_line_pointer += sizeof "alloc" - 1; | |
517 | } | |
518 | else if (strncmp (input_line_pointer, "execinstr", | |
519 | sizeof "execinstr" - 1) == 0) | |
520 | { | |
521 | flags |= SEC_CODE; | |
522 | input_line_pointer += sizeof "execinstr" - 1; | |
523 | } | |
524 | else | |
525 | { | |
526 | as_warn ("Unrecognized section attribute"); | |
527 | ignore_rest_of_line (); | |
528 | return; | |
529 | } | |
530 | SKIP_WHITESPACE (); | |
531 | } | |
532 | while (*input_line_pointer++ == ','); | |
533 | --input_line_pointer; | |
49864cfa | 534 | } |
49864cfa | 535 | } |
49864cfa | 536 | |
fa20b8bf | 537 | bfd_set_section_flags (stdoutput, sec, flags); |
13998021 | 538 | |
fa20b8bf | 539 | demand_empty_rest_of_line (); |
13998021 ILT |
540 | } |
541 | ||
542 | /* Change to the .data section. */ | |
543 | ||
544 | static void | |
545 | obj_elf_data (i) | |
546 | int i; | |
547 | { | |
548 | previous_section = now_seg; | |
549 | previous_subsection = now_subseg; | |
550 | s_data (i); | |
551 | } | |
552 | ||
553 | /* Change to the .text section. */ | |
554 | ||
555 | static void | |
556 | obj_elf_text (i) | |
557 | int i; | |
558 | { | |
559 | previous_section = now_seg; | |
560 | previous_subsection = now_subseg; | |
561 | s_text (i); | |
49864cfa KR |
562 | } |
563 | ||
693b21e7 | 564 | void |
604633ae ILT |
565 | obj_elf_previous (ignore) |
566 | int ignore; | |
7c05f0ec KR |
567 | { |
568 | if (previous_section == 0) | |
569 | { | |
570 | as_bad (".previous without corresponding .section; ignored"); | |
571 | return; | |
572 | } | |
573 | subseg_set (previous_section, previous_subsection); | |
574 | previous_section = 0; | |
575 | } | |
576 | ||
604633ae | 577 | static int |
6e378515 KR |
578 | obj_elf_write_symbol_p (sym) |
579 | symbolS *sym; | |
49864cfa | 580 | { |
6e378515 KR |
581 | /* If this is a local symbol, are there any relocations for which |
582 | need this symbol? */ | |
49864cfa | 583 | |
6e378515 KR |
584 | /* To find this out, we examine all relocations in all bfd sections |
585 | that have relocations. If there is one that references this | |
586 | symbol, we need to keep this symbol. In this case, we return a | |
587 | true status. In all other cases, we return a false status. */ | |
49864cfa | 588 | |
6e378515 | 589 | if (S_IS_LOCAL (sym)) |
49864cfa | 590 | { |
6e378515 KR |
591 | asymbol *bsym = sym->bsym; |
592 | bfd *abfd = bsym->the_bfd; | |
593 | asection *bsec; | |
49864cfa | 594 | |
6e378515 KR |
595 | for (bsec = abfd->sections; bsec; bsec = bsec->next) |
596 | { | |
597 | struct reloc_cache_entry **rlocs = bsec->orelocation; | |
598 | int rcnt = bsec->reloc_count; | |
49864cfa | 599 | |
6e378515 KR |
600 | if (rlocs) |
601 | { | |
602 | int i; | |
49864cfa | 603 | |
6e378515 KR |
604 | for (i = 0; i < rcnt; i++) |
605 | if (rlocs[i]->sym_ptr_ptr | |
606 | && rlocs[i]->sym_ptr_ptr[0] == bsym) | |
607 | return 1; | |
608 | } | |
609 | else | |
610 | { | |
611 | /* No relocations for this section. Check the seg_info | |
612 | structure to see if there are any fixups for this | |
613 | section. */ | |
614 | segment_info_type *seginfo = seg_info (bsec); | |
615 | fixS *fixp; | |
616 | ||
617 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
618 | if ((fixp->fx_addsy && fixp->fx_addsy->bsym == bsym) | |
619 | || (fixp->fx_subsy && fixp->fx_subsy->bsym == bsym)) | |
620 | return 1; | |
621 | } | |
49864cfa | 622 | } |
49864cfa | 623 | } |
6e378515 | 624 | return 0; |
49864cfa KR |
625 | } |
626 | ||
6e378515 KR |
627 | int |
628 | obj_elf_write_symbol (sym) | |
629 | symbolS *sym; | |
49864cfa | 630 | { |
6e378515 | 631 | return /* obj_elf_write_symbol_p (sym) || */ !S_IS_LOCAL (sym); |
49864cfa KR |
632 | } |
633 | ||
49864cfa KR |
634 | int |
635 | obj_elf_frob_symbol (sym, punt) | |
636 | symbolS *sym; | |
637 | int *punt; | |
638 | { | |
693b21e7 KR |
639 | #if 0 /* ?? The return value is ignored. Only the value of *punt is |
640 | relevant. */ | |
6e378515 | 641 | return obj_elf_write_symbol_p (sym); |
693b21e7 | 642 | #endif |
58d4951d ILT |
643 | /* FIXME: Just return 0 until is fixed. */ |
644 | return 0; | |
49864cfa KR |
645 | } |
646 | ||
6e378515 | 647 | static void |
604633ae ILT |
648 | obj_elf_line (ignore) |
649 | int ignore; | |
6e378515 KR |
650 | { |
651 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
652 | delightful bug, so we are not being incompatible here. */ | |
653 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); | |
654 | demand_empty_rest_of_line (); | |
655 | } | |
49864cfa | 656 | |
6e378515 KR |
657 | void |
658 | obj_read_begin_hook () | |
49864cfa | 659 | { |
c5953036 ILT |
660 | #ifdef ECOFF_DEBUGGING |
661 | ecoff_read_begin_hook (); | |
662 | #endif | |
49864cfa KR |
663 | } |
664 | ||
6e378515 KR |
665 | void |
666 | obj_symbol_new_hook (symbolP) | |
667 | symbolS *symbolP; | |
49864cfa | 668 | { |
6e378515 KR |
669 | #if 0 /* BFD already takes care of this */ |
670 | elf32_symbol_type *esym = (elf32_symbol_type *) symbolP; | |
49864cfa KR |
671 | |
672 | /* There is an Elf_Internal_Sym and an Elf_External_Sym. For now, | |
673 | just zero them out. */ | |
674 | ||
6e378515 KR |
675 | bzero ((char *) &esym->internal_elf_sym, sizeof (esym->internal_elf_sym)); |
676 | bzero ((char *) &esym->native_elf_sym, sizeof (esym->native_elf_sym)); | |
677 | bzero ((char *) &esym->tc_data, sizeof (esym->tc_data)); | |
678 | #endif | |
c5953036 ILT |
679 | #ifdef ECOFF_DEBUGGING |
680 | ecoff_symbol_new_hook (symbolP); | |
681 | #endif | |
49864cfa KR |
682 | } |
683 | ||
6e378515 | 684 | void |
604633ae ILT |
685 | obj_elf_version (ignore) |
686 | int ignore; | |
49864cfa | 687 | { |
6e378515 KR |
688 | char *name; |
689 | unsigned int c; | |
690 | char ch; | |
691 | char *p; | |
692 | asection *seg = now_seg; | |
693 | subsegT subseg = now_subseg; | |
694 | Elf_Internal_Note i_note; | |
695 | Elf_External_Note e_note; | |
696 | asection *note_secp = (asection *) NULL; | |
697 | int i, len; | |
698 | ||
699 | SKIP_WHITESPACE (); | |
700 | if (*input_line_pointer == '\"') | |
701 | { | |
702 | ++input_line_pointer; /* -> 1st char of string. */ | |
49864cfa KR |
703 | name = input_line_pointer; |
704 | ||
6e378515 KR |
705 | while (is_a_char (c = next_char_of_string ())) |
706 | ; | |
49864cfa KR |
707 | c = *input_line_pointer; |
708 | *input_line_pointer = '\0'; | |
6e378515 | 709 | *(input_line_pointer - 1) = '\0'; |
49864cfa KR |
710 | *input_line_pointer = c; |
711 | ||
4f0bccc7 | 712 | /* create the .note section */ |
49864cfa | 713 | |
4f0bccc7 ILT |
714 | note_secp = subseg_new (".note", 0); |
715 | bfd_set_section_flags (stdoutput, | |
716 | note_secp, | |
717 | SEC_HAS_CONTENTS | SEC_READONLY); | |
49864cfa KR |
718 | |
719 | /* process the version string */ | |
720 | ||
6e378515 KR |
721 | len = strlen (name); |
722 | ||
693b21e7 KR |
723 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ |
724 | i_note.descsz = 0; /* no description */ | |
6e378515 KR |
725 | i_note.type = NT_VERSION; |
726 | p = frag_more (sizeof (e_note.namesz)); | |
727 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
728 | p = frag_more (sizeof (e_note.descsz)); | |
729 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
730 | p = frag_more (sizeof (e_note.type)); | |
731 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
732 | ||
733 | for (i = 0; i < len; i++) | |
734 | { | |
735 | ch = *(name + i); | |
736 | { | |
737 | FRAG_APPEND_1_CHAR (ch); | |
738 | } | |
739 | } | |
740 | frag_align (2, 0); | |
49864cfa | 741 | |
604633ae | 742 | subseg_set (seg, subseg); |
49864cfa | 743 | } |
6e378515 KR |
744 | else |
745 | { | |
693b21e7 | 746 | as_bad ("Expected quoted string"); |
49864cfa | 747 | } |
6e378515 | 748 | demand_empty_rest_of_line (); |
49864cfa KR |
749 | } |
750 | ||
751 | static void | |
604633ae ILT |
752 | obj_elf_size (ignore) |
753 | int ignore; | |
49864cfa KR |
754 | { |
755 | char *name = input_line_pointer; | |
756 | char c = get_symbol_end (); | |
757 | char *p; | |
758 | expressionS exp; | |
49864cfa KR |
759 | symbolS *sym; |
760 | ||
761 | p = input_line_pointer; | |
762 | *p = c; | |
763 | SKIP_WHITESPACE (); | |
764 | if (*input_line_pointer != ',') | |
765 | { | |
766 | *p = 0; | |
767 | as_bad ("expected comma after name `%s' in .size directive", name); | |
768 | *p = c; | |
769 | ignore_rest_of_line (); | |
770 | return; | |
771 | } | |
772 | input_line_pointer++; | |
5ac34ac3 ILT |
773 | expression (&exp); |
774 | if (exp.X_op == O_absent) | |
49864cfa KR |
775 | { |
776 | as_bad ("missing expression in .size directive"); | |
5ac34ac3 | 777 | exp.X_op = O_constant; |
49864cfa KR |
778 | exp.X_add_number = 0; |
779 | } | |
780 | *p = 0; | |
781 | sym = symbol_find_or_make (name); | |
782 | *p = c; | |
5ac34ac3 | 783 | if (exp.X_op == O_constant) |
49864cfa KR |
784 | S_SET_SIZE (sym, exp.X_add_number); |
785 | else | |
6e378515 KR |
786 | { |
787 | #if 0 | |
788 | static int warned; | |
789 | if (!warned) | |
790 | { | |
791 | as_tsktsk (".size expressions not yet supported, ignored"); | |
792 | warned++; | |
793 | } | |
794 | #endif | |
795 | } | |
49864cfa KR |
796 | demand_empty_rest_of_line (); |
797 | } | |
798 | ||
799 | static void | |
604633ae ILT |
800 | obj_elf_type (ignore) |
801 | int ignore; | |
49864cfa KR |
802 | { |
803 | char *name = input_line_pointer; | |
804 | char c = get_symbol_end (); | |
805 | char *p; | |
6e378515 | 806 | int type = 0; |
49864cfa KR |
807 | symbolS *sym; |
808 | ||
809 | p = input_line_pointer; | |
810 | *p = c; | |
811 | SKIP_WHITESPACE (); | |
812 | if (*input_line_pointer != ',') | |
813 | { | |
814 | as_bad ("expected comma after name in .type directive"); | |
815 | egress: | |
816 | ignore_rest_of_line (); | |
817 | return; | |
818 | } | |
819 | input_line_pointer++; | |
820 | SKIP_WHITESPACE (); | |
b81b8a7d | 821 | if (*input_line_pointer != '#' && *input_line_pointer != '@') |
49864cfa | 822 | { |
b81b8a7d | 823 | as_bad ("expected `#' or `@' after comma in .type directive"); |
49864cfa KR |
824 | goto egress; |
825 | } | |
826 | input_line_pointer++; | |
827 | if (!strncmp ("function", input_line_pointer, sizeof ("function") - 1)) | |
828 | { | |
829 | type = BSF_FUNCTION; | |
830 | input_line_pointer += sizeof ("function") - 1; | |
831 | } | |
6e378515 KR |
832 | else if (!strncmp ("object", input_line_pointer, sizeof ("object") - 1)) |
833 | { | |
834 | input_line_pointer += sizeof ("object") - 1; | |
835 | } | |
49864cfa KR |
836 | else |
837 | { | |
838 | as_bad ("unrecognized symbol type, ignored"); | |
839 | goto egress; | |
840 | } | |
841 | demand_empty_rest_of_line (); | |
842 | *p = 0; | |
843 | sym = symbol_find_or_make (name); | |
6e378515 | 844 | sym->bsym->flags |= type; |
49864cfa KR |
845 | } |
846 | ||
847 | static void | |
604633ae ILT |
848 | obj_elf_ident (ignore) |
849 | int ignore; | |
49864cfa | 850 | { |
6e378515 KR |
851 | static segT comment_section; |
852 | segT old_section = now_seg; | |
853 | int old_subsection = now_subseg; | |
49864cfa | 854 | |
6e378515 KR |
855 | if (!comment_section) |
856 | { | |
857 | char *p; | |
858 | comment_section = subseg_new (".comment", 0); | |
fa20b8bf ILT |
859 | bfd_set_section_flags (stdoutput, comment_section, |
860 | SEC_READONLY | SEC_HAS_CONTENTS); | |
6e378515 KR |
861 | p = frag_more (1); |
862 | *p = 0; | |
863 | } | |
864 | else | |
865 | subseg_set (comment_section, 0); | |
866 | stringer (1); | |
867 | subseg_set (old_section, old_subsection); | |
868 | } | |
869 | ||
9bd0d649 ILT |
870 | /* The first entry in a .stabs section is special. */ |
871 | ||
872 | void | |
873 | obj_elf_init_stab_section (seg) | |
874 | segT seg; | |
875 | { | |
fa20b8bf | 876 | char *file; |
9bd0d649 | 877 | char *p; |
c5953036 | 878 | char *stabstr_name; |
9bd0d649 ILT |
879 | unsigned int stroff; |
880 | ||
fa20b8bf ILT |
881 | /* Force the section to align to a longword boundary. Without this, |
882 | UnixWare ar crashes. */ | |
883 | bfd_set_section_alignment (stdoutput, seg, 2); | |
884 | ||
9bd0d649 | 885 | p = frag_more (12); |
fa20b8bf | 886 | as_where (&file, (unsigned int *) NULL); |
c5953036 ILT |
887 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); |
888 | strcpy (stabstr_name, segment_name (seg)); | |
889 | strcat (stabstr_name, "str"); | |
890 | stroff = get_stab_string_offset (file, stabstr_name); | |
9bd0d649 ILT |
891 | know (stroff == 1); |
892 | md_number_to_chars (p, stroff, 4); | |
893 | seg_info (seg)->stabu.p = p; | |
894 | } | |
895 | ||
896 | /* Fill in the counts in the first entry in a .stabs section. */ | |
897 | ||
693b21e7 KR |
898 | static void |
899 | adjust_stab_sections (abfd, sec, xxx) | |
900 | bfd *abfd; | |
901 | asection *sec; | |
902 | PTR xxx; | |
903 | { | |
904 | char *name; | |
905 | asection *strsec; | |
4f0bccc7 | 906 | char *p; |
693b21e7 KR |
907 | int strsz, nsyms; |
908 | ||
909 | if (strncmp (".stab", sec->name, 5)) | |
910 | return; | |
911 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
912 | return; | |
913 | ||
914 | name = (char *) alloca (strlen (sec->name) + 4); | |
915 | strcpy (name, sec->name); | |
916 | strcat (name, "str"); | |
917 | strsec = bfd_get_section_by_name (abfd, name); | |
918 | if (strsec) | |
919 | strsz = bfd_section_size (abfd, strsec); | |
920 | else | |
921 | strsz = 0; | |
922 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
923 | ||
4f0bccc7 ILT |
924 | p = seg_info (sec)->stabu.p; |
925 | assert (p != 0); | |
693b21e7 | 926 | |
9bd0d649 ILT |
927 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); |
928 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
693b21e7 KR |
929 | } |
930 | ||
c5953036 ILT |
931 | #ifdef ECOFF_DEBUGGING |
932 | ||
933 | /* This function is called by the ECOFF code. It is supposed to | |
934 | record the external symbol information so that the backend can | |
935 | write it out correctly. The ELF backend doesn't actually handle | |
936 | this at the moment, so we do it ourselves. We save the information | |
937 | in the symbol. */ | |
938 | ||
939 | void | |
940 | obj_ecoff_set_ext (sym, ext) | |
941 | symbolS *sym; | |
942 | EXTR *ext; | |
943 | { | |
944 | sym->bsym->udata = (PTR) ext; | |
945 | } | |
946 | ||
947 | /* This function is called by bfd_ecoff_debug_externals. It is | |
948 | supposed to *EXT to the external symbol information, and return | |
949 | whether the symbol should be used at all. */ | |
950 | ||
951 | static boolean | |
952 | elf_get_extr (sym, ext) | |
953 | asymbol *sym; | |
954 | EXTR *ext; | |
955 | { | |
956 | if (sym->udata == NULL) | |
957 | return false; | |
958 | *ext = *(EXTR *) sym->udata; | |
959 | return true; | |
960 | } | |
961 | ||
962 | /* This function is called by bfd_ecoff_debug_externals. It has | |
963 | nothing to do for ELF. */ | |
964 | ||
965 | /*ARGSUSED*/ | |
966 | static void | |
967 | elf_set_index (sym, indx) | |
968 | asymbol *sym; | |
969 | bfd_size_type indx; | |
970 | { | |
971 | } | |
972 | ||
973 | #endif /* ECOFF_DEBUGGING */ | |
974 | ||
6e378515 KR |
975 | void |
976 | elf_frob_file () | |
977 | { | |
693b21e7 KR |
978 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); |
979 | ||
6e378515 | 980 | #ifdef elf_tc_symbol |
693b21e7 KR |
981 | { |
982 | int i; | |
6e378515 | 983 | |
693b21e7 | 984 | for (i = 0; i < stdoutput->symcount; i++) |
5cf4cd1b | 985 | elf_tc_symbol (stdoutput, (PTR) (stdoutput->outsymbols[i]), |
693b21e7 KR |
986 | i + 1); |
987 | } | |
6e378515 | 988 | #endif |
693b21e7 | 989 | |
6e378515 | 990 | #ifdef elf_tc_final_processing |
5cf4cd1b | 991 | elf_tc_final_processing (); |
6e378515 KR |
992 | #endif |
993 | ||
994 | /* Finally, we must make any target-specific sections. */ | |
995 | ||
996 | #ifdef elf_tc_make_sections | |
5cf4cd1b | 997 | elf_tc_make_sections (stdoutput); |
6e378515 | 998 | #endif |
c5953036 ILT |
999 | |
1000 | #ifdef ECOFF_DEBUGGING | |
1001 | /* Generate the ECOFF debugging information. */ | |
1002 | { | |
1003 | const struct ecoff_debug_swap *debug_swap; | |
1004 | struct ecoff_debug_info debug; | |
1005 | char *buf; | |
1006 | asection *sec; | |
1007 | ||
1008 | debug_swap | |
1009 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1010 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1011 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1012 | ||
1013 | /* Set up the pointers in debug. */ | |
1014 | #define SET(ptr, offset, type) \ | |
1015 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1016 | ||
1017 | SET (line, cbLineOffset, unsigned char *); | |
1018 | SET (external_dnr, cbDnOffset, PTR); | |
1019 | SET (external_pdr, cbPdOffset, PTR); | |
1020 | SET (external_sym, cbSymOffset, PTR); | |
1021 | SET (external_opt, cbOptOffset, PTR); | |
1022 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1023 | SET (ss, cbSsOffset, char *); | |
1024 | SET (external_fdr, cbFdOffset, PTR); | |
1025 | SET (external_rfd, cbRfdOffset, PTR); | |
1026 | /* ssext and external_ext are set up just below. */ | |
1027 | ||
1028 | #undef SET | |
1029 | ||
1030 | /* Set up the external symbols. */ | |
1031 | debug.ssext = debug.ssext_end = NULL; | |
1032 | debug.external_ext = debug.external_ext_end = NULL; | |
1033 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1034 | elf_get_extr, elf_set_index)) | |
1035 | as_fatal ("Failed to set up debugging information: %s", | |
1036 | bfd_errmsg (bfd_error)); | |
1037 | ||
1038 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1039 | assert (sec != NULL); | |
1040 | ||
1041 | know (stdoutput->output_has_begun == false); | |
1042 | ||
1043 | /* We set the size of the section, call bfd_set_section_contents | |
1044 | to force the ELF backend to allocate a file position, and then | |
1045 | write out the data. FIXME: Is this really the best way to do | |
1046 | this? */ | |
1047 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1048 | ||
1049 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) NULL, | |
1050 | (file_ptr) 0, (bfd_size_type) 0)) | |
1051 | as_fatal ("Can't start writing .mdebug section: %s", | |
1052 | bfd_errmsg (bfd_error)); | |
1053 | ||
1054 | know (stdoutput->output_has_begun == true); | |
1055 | know (sec->filepos != 0); | |
1056 | ||
1057 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1058 | sec->filepos)) | |
1059 | as_fatal ("Could not write .mdebug section: %s", | |
1060 | bfd_errmsg (bfd_error)); | |
1061 | } | |
1062 | #endif /* ECOFF_DEBUGGING */ | |
49864cfa | 1063 | } |