Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF object file format |
fa306131 AM |
2 | Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99, 2000 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as | |
9 | published by the Free Software Foundation; either version 2, | |
10 | or (at your option) any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | the GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #define OBJ_HEADER "obj-elf.h" | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | #include "obstack.h" | |
26 | ||
27 | #ifndef ECOFF_DEBUGGING | |
28 | #define ECOFF_DEBUGGING 0 | |
29 | #else | |
30 | #define NEED_ECOFF_DEBUG | |
31 | #endif | |
32 | ||
33 | #ifdef NEED_ECOFF_DEBUG | |
34 | #include "ecoff.h" | |
35 | #endif | |
36 | ||
37 | #ifdef TC_ALPHA | |
38 | #include "elf/alpha.h" | |
39 | #endif | |
40 | ||
41 | #ifdef TC_MIPS | |
42 | #include "elf/mips.h" | |
43 | #endif | |
44 | ||
45 | #ifdef TC_PPC | |
46 | #include "elf/ppc.h" | |
47 | #endif | |
48 | ||
5b93d8bb AM |
49 | #ifdef TC_I370 |
50 | #include "elf/i370.h" | |
51 | #endif | |
52 | ||
252b5132 RH |
53 | static bfd_vma elf_s_get_size PARAMS ((symbolS *)); |
54 | static void elf_s_set_size PARAMS ((symbolS *, bfd_vma)); | |
55 | static bfd_vma elf_s_get_align PARAMS ((symbolS *)); | |
56 | static void elf_s_set_align PARAMS ((symbolS *, bfd_vma)); | |
5110c57e | 57 | static void elf_s_set_other PARAMS ((symbolS *, int)); |
252b5132 RH |
58 | static void elf_copy_symbol_attributes PARAMS ((symbolS *, symbolS *)); |
59 | static int elf_sec_sym_ok_for_reloc PARAMS ((asection *)); | |
60 | static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR)); | |
5110c57e HPN |
61 | static int elf_separate_stab_sections PARAMS ((void)); |
62 | static void elf_init_stab_section PARAMS ((segT)); | |
252b5132 RH |
63 | |
64 | #ifdef NEED_ECOFF_DEBUG | |
65 | static boolean elf_get_extr PARAMS ((asymbol *, EXTR *)); | |
66 | static void elf_set_index PARAMS ((asymbol *, bfd_size_type)); | |
67 | #endif | |
68 | ||
69 | static void obj_elf_line PARAMS ((int)); | |
70 | void obj_elf_version PARAMS ((int)); | |
71 | static void obj_elf_size PARAMS ((int)); | |
72 | static void obj_elf_type PARAMS ((int)); | |
73 | static void obj_elf_ident PARAMS ((int)); | |
74 | static void obj_elf_weak PARAMS ((int)); | |
75 | static void obj_elf_local PARAMS ((int)); | |
2e13b764 | 76 | static void obj_elf_visibility PARAMS ((int)); |
252b5132 | 77 | static void obj_elf_symver PARAMS ((int)); |
252b5132 | 78 | static void obj_elf_subsection PARAMS ((int)); |
9de8d8f1 | 79 | static void obj_elf_popsection PARAMS ((int)); |
252b5132 RH |
80 | |
81 | static const pseudo_typeS elf_pseudo_table[] = | |
82 | { | |
83 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 84 | {"common", obj_elf_common, 1}, |
252b5132 RH |
85 | {"ident", obj_elf_ident, 0}, |
86 | {"local", obj_elf_local, 0}, | |
87 | {"previous", obj_elf_previous, 0}, | |
88 | {"section", obj_elf_section, 0}, | |
89 | {"section.s", obj_elf_section, 0}, | |
90 | {"sect", obj_elf_section, 0}, | |
91 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
92 | {"pushsection", obj_elf_section, 1}, |
93 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
94 | {"size", obj_elf_size, 0}, |
95 | {"type", obj_elf_type, 0}, | |
96 | {"version", obj_elf_version, 0}, | |
97 | {"weak", obj_elf_weak, 0}, | |
98 | ||
2e13b764 NC |
99 | /* These define symbol visibility. */ |
100 | {"internal", obj_elf_visibility, STV_INTERNAL}, | |
101 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
102 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
103 | ||
252b5132 RH |
104 | /* These are used for stabs-in-elf configurations. */ |
105 | {"line", obj_elf_line, 0}, | |
106 | ||
107 | /* This is a GNU extension to handle symbol versions. */ | |
108 | {"symver", obj_elf_symver, 0}, | |
109 | ||
110 | /* A GNU extension to change subsection only. */ | |
111 | {"subsection", obj_elf_subsection, 0}, | |
112 | ||
113 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
904a31bf AM |
114 | {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0}, |
115 | {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0}, | |
252b5132 RH |
116 | |
117 | /* These are used for dwarf. */ | |
118 | {"2byte", cons, 2}, | |
119 | {"4byte", cons, 4}, | |
120 | {"8byte", cons, 8}, | |
121 | ||
122 | /* We need to trap the section changing calls to handle .previous. */ | |
123 | {"data", obj_elf_data, 0}, | |
124 | {"text", obj_elf_text, 0}, | |
125 | ||
126 | /* End sentinel. */ | |
ab9da554 | 127 | {NULL, NULL, 0}, |
252b5132 RH |
128 | }; |
129 | ||
130 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
131 | { | |
132 | #ifdef NEED_ECOFF_DEBUG | |
133 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
134 | is used instead. */ | |
135 | { "def", ecoff_directive_def, 0 }, | |
136 | { "dim", ecoff_directive_dim, 0 }, | |
137 | { "endef", ecoff_directive_endef, 0 }, | |
138 | { "file", ecoff_directive_file, 0 }, | |
139 | { "scl", ecoff_directive_scl, 0 }, | |
140 | { "tag", ecoff_directive_tag, 0 }, | |
141 | { "val", ecoff_directive_val, 0 }, | |
142 | ||
143 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
144 | already has meanings for those. We use .esize and .etype | |
145 | instead. These are only generated by gcc anyhow. */ | |
146 | { "esize", ecoff_directive_size, 0 }, | |
147 | { "etype", ecoff_directive_type, 0 }, | |
148 | ||
149 | /* ECOFF specific debugging information. */ | |
150 | { "begin", ecoff_directive_begin, 0 }, | |
151 | { "bend", ecoff_directive_bend, 0 }, | |
152 | { "end", ecoff_directive_end, 0 }, | |
153 | { "ent", ecoff_directive_ent, 0 }, | |
154 | { "fmask", ecoff_directive_fmask, 0 }, | |
155 | { "frame", ecoff_directive_frame, 0 }, | |
156 | { "loc", ecoff_directive_loc, 0 }, | |
157 | { "mask", ecoff_directive_mask, 0 }, | |
158 | ||
159 | /* Other ECOFF directives. */ | |
160 | { "extern", ecoff_directive_extern, 0 }, | |
161 | ||
162 | /* These are used on Irix. I don't know how to implement them. */ | |
163 | { "alias", s_ignore, 0 }, | |
164 | { "bgnb", s_ignore, 0 }, | |
165 | { "endb", s_ignore, 0 }, | |
166 | { "lab", s_ignore, 0 }, | |
167 | { "noalias", s_ignore, 0 }, | |
168 | { "verstamp", s_ignore, 0 }, | |
169 | { "vreg", s_ignore, 0 }, | |
170 | #endif | |
171 | ||
ab9da554 | 172 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
173 | }; |
174 | ||
175 | #undef NO_RELOC | |
176 | #include "aout/aout64.h" | |
177 | ||
178 | /* This is called when the assembler starts. */ | |
179 | ||
180 | void | |
181 | elf_begin () | |
182 | { | |
183 | /* Add symbols for the known sections to the symbol table. */ | |
184 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
185 | TEXT_SECTION_NAME))); | |
186 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
187 | DATA_SECTION_NAME))); | |
188 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
189 | BSS_SECTION_NAME))); | |
190 | } | |
191 | ||
192 | void | |
193 | elf_pop_insert () | |
194 | { | |
195 | pop_insert (elf_pseudo_table); | |
196 | if (ECOFF_DEBUGGING) | |
197 | pop_insert (ecoff_debug_pseudo_table); | |
198 | } | |
199 | ||
200 | static bfd_vma | |
201 | elf_s_get_size (sym) | |
202 | symbolS *sym; | |
203 | { | |
204 | return S_GET_SIZE (sym); | |
205 | } | |
206 | ||
207 | static void | |
208 | elf_s_set_size (sym, sz) | |
209 | symbolS *sym; | |
210 | bfd_vma sz; | |
211 | { | |
212 | S_SET_SIZE (sym, sz); | |
213 | } | |
214 | ||
215 | static bfd_vma | |
216 | elf_s_get_align (sym) | |
217 | symbolS *sym; | |
218 | { | |
219 | return S_GET_ALIGN (sym); | |
220 | } | |
221 | ||
222 | static void | |
223 | elf_s_set_align (sym, align) | |
224 | symbolS *sym; | |
225 | bfd_vma align; | |
226 | { | |
227 | S_SET_ALIGN (sym, align); | |
228 | } | |
229 | ||
4c63da97 AM |
230 | int |
231 | elf_s_get_other (sym) | |
232 | symbolS *sym; | |
233 | { | |
234 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
235 | } | |
236 | ||
5110c57e HPN |
237 | static void |
238 | elf_s_set_other (sym, other) | |
239 | symbolS *sym; | |
240 | int other; | |
241 | { | |
242 | S_SET_OTHER (sym, other); | |
243 | } | |
244 | ||
252b5132 RH |
245 | static void |
246 | elf_copy_symbol_attributes (dest, src) | |
247 | symbolS *dest, *src; | |
248 | { | |
249 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
250 | } | |
251 | ||
252 | static int | |
253 | elf_sec_sym_ok_for_reloc (sec) | |
254 | asection *sec; | |
255 | { | |
256 | return obj_sec_sym_ok_for_reloc (sec); | |
257 | } | |
258 | ||
259 | void | |
260 | elf_file_symbol (s) | |
5110c57e | 261 | const char *s; |
252b5132 RH |
262 | { |
263 | symbolS *sym; | |
264 | ||
265 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
49309057 ILT |
266 | symbol_set_frag (sym, &zero_address_frag); |
267 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 RH |
268 | |
269 | if (symbol_rootP != sym) | |
270 | { | |
271 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
272 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
273 | #ifdef DEBUG | |
274 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
275 | #endif | |
276 | } | |
277 | ||
278 | #ifdef NEED_ECOFF_DEBUG | |
279 | ecoff_new_file (s); | |
280 | #endif | |
281 | } | |
282 | ||
16b93d88 | 283 | void |
9be1cda6 AS |
284 | obj_elf_common (is_common) |
285 | int is_common; | |
252b5132 RH |
286 | { |
287 | char *name; | |
288 | char c; | |
289 | char *p; | |
290 | int temp, size; | |
291 | symbolS *symbolP; | |
292 | int have_align; | |
293 | ||
9be1cda6 AS |
294 | if (flag_mri && is_common) |
295 | { | |
296 | s_mri_common (0); | |
297 | return; | |
298 | } | |
299 | ||
252b5132 RH |
300 | name = input_line_pointer; |
301 | c = get_symbol_end (); | |
302 | /* just after name is now '\0' */ | |
303 | p = input_line_pointer; | |
304 | *p = c; | |
305 | SKIP_WHITESPACE (); | |
306 | if (*input_line_pointer != ',') | |
307 | { | |
308 | as_bad (_("Expected comma after symbol-name")); | |
309 | ignore_rest_of_line (); | |
310 | return; | |
311 | } | |
312 | input_line_pointer++; /* skip ',' */ | |
313 | if ((temp = get_absolute_expression ()) < 0) | |
314 | { | |
315 | as_bad (_(".COMMon length (%d.) <0! Ignored."), temp); | |
316 | ignore_rest_of_line (); | |
317 | return; | |
318 | } | |
319 | size = temp; | |
320 | *p = 0; | |
321 | symbolP = symbol_find_or_make (name); | |
322 | *p = c; | |
323 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
324 | { | |
325 | as_bad (_("Ignoring attempt to re-define symbol")); | |
326 | ignore_rest_of_line (); | |
327 | return; | |
328 | } | |
329 | if (S_GET_VALUE (symbolP) != 0) | |
330 | { | |
ab9da554 | 331 | if (S_GET_VALUE (symbolP) != (valueT) size) |
252b5132 RH |
332 | { |
333 | as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."), | |
334 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
335 | } | |
336 | } | |
337 | know (symbolP->sy_frag == &zero_address_frag); | |
338 | if (*input_line_pointer != ',') | |
339 | have_align = 0; | |
340 | else | |
341 | { | |
342 | have_align = 1; | |
343 | input_line_pointer++; | |
344 | SKIP_WHITESPACE (); | |
345 | } | |
346 | if (! have_align || *input_line_pointer != '"') | |
347 | { | |
348 | if (! have_align) | |
349 | temp = 0; | |
350 | else | |
351 | { | |
352 | temp = get_absolute_expression (); | |
353 | if (temp < 0) | |
354 | { | |
355 | temp = 0; | |
356 | as_warn (_("Common alignment negative; 0 assumed")); | |
357 | } | |
358 | } | |
49309057 | 359 | if (symbol_get_obj (symbolP)->local) |
252b5132 RH |
360 | { |
361 | segT old_sec; | |
362 | int old_subsec; | |
363 | char *pfrag; | |
364 | int align; | |
365 | ||
366 | /* allocate_bss: */ | |
367 | old_sec = now_seg; | |
368 | old_subsec = now_subseg; | |
369 | if (temp) | |
370 | { | |
371 | /* convert to a power of 2 alignment */ | |
372 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
373 | if (temp != 1) | |
374 | { | |
375 | as_bad (_("Common alignment not a power of 2")); | |
376 | ignore_rest_of_line (); | |
377 | return; | |
378 | } | |
379 | } | |
380 | else | |
381 | align = 0; | |
382 | record_alignment (bss_section, align); | |
383 | subseg_set (bss_section, 0); | |
384 | if (align) | |
385 | frag_align (align, 0, 0); | |
386 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
49309057 ILT |
387 | symbol_get_frag (symbolP)->fr_symbol = 0; |
388 | symbol_set_frag (symbolP, frag_now); | |
252b5132 RH |
389 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
390 | (offsetT) size, (char *) 0); | |
391 | *pfrag = 0; | |
392 | S_SET_SIZE (symbolP, size); | |
393 | S_SET_SEGMENT (symbolP, bss_section); | |
394 | S_CLEAR_EXTERNAL (symbolP); | |
395 | subseg_set (old_sec, old_subsec); | |
396 | } | |
397 | else | |
398 | { | |
399 | allocate_common: | |
400 | S_SET_VALUE (symbolP, (valueT) size); | |
401 | S_SET_ALIGN (symbolP, temp); | |
402 | S_SET_EXTERNAL (symbolP); | |
403 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
404 | } | |
405 | } | |
406 | else | |
407 | { | |
408 | input_line_pointer++; | |
409 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
410 | if (*input_line_pointer == '.') | |
411 | input_line_pointer++; | |
412 | /* @@ Some say data, some say bss. */ | |
413 | if (strncmp (input_line_pointer, "bss\"", 4) | |
414 | && strncmp (input_line_pointer, "data\"", 5)) | |
415 | { | |
416 | while (*--input_line_pointer != '"') | |
417 | ; | |
418 | input_line_pointer--; | |
419 | goto bad_common_segment; | |
420 | } | |
421 | while (*input_line_pointer++ != '"') | |
422 | ; | |
423 | goto allocate_common; | |
424 | } | |
425 | ||
49309057 | 426 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 RH |
427 | |
428 | demand_empty_rest_of_line (); | |
429 | return; | |
430 | ||
431 | { | |
432 | bad_common_segment: | |
433 | p = input_line_pointer; | |
434 | while (*p && *p != '\n') | |
435 | p++; | |
436 | c = *p; | |
437 | *p = '\0'; | |
438 | as_bad (_("bad .common segment %s"), input_line_pointer + 1); | |
439 | *p = c; | |
440 | input_line_pointer = p; | |
441 | ignore_rest_of_line (); | |
442 | return; | |
443 | } | |
444 | } | |
445 | ||
446 | static void | |
447 | obj_elf_local (ignore) | |
ab9da554 | 448 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
449 | { |
450 | char *name; | |
451 | int c; | |
452 | symbolS *symbolP; | |
453 | ||
454 | do | |
455 | { | |
456 | name = input_line_pointer; | |
457 | c = get_symbol_end (); | |
458 | symbolP = symbol_find_or_make (name); | |
459 | *input_line_pointer = c; | |
460 | SKIP_WHITESPACE (); | |
461 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 462 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
463 | if (c == ',') |
464 | { | |
465 | input_line_pointer++; | |
466 | SKIP_WHITESPACE (); | |
467 | if (*input_line_pointer == '\n') | |
468 | c = '\n'; | |
469 | } | |
470 | } | |
471 | while (c == ','); | |
472 | demand_empty_rest_of_line (); | |
473 | } | |
474 | ||
475 | static void | |
476 | obj_elf_weak (ignore) | |
ab9da554 | 477 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
478 | { |
479 | char *name; | |
480 | int c; | |
481 | symbolS *symbolP; | |
482 | ||
483 | do | |
484 | { | |
485 | name = input_line_pointer; | |
486 | c = get_symbol_end (); | |
487 | symbolP = symbol_find_or_make (name); | |
488 | *input_line_pointer = c; | |
489 | SKIP_WHITESPACE (); | |
490 | S_SET_WEAK (symbolP); | |
49309057 | 491 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
492 | if (c == ',') |
493 | { | |
494 | input_line_pointer++; | |
495 | SKIP_WHITESPACE (); | |
496 | if (*input_line_pointer == '\n') | |
497 | c = '\n'; | |
498 | } | |
499 | } | |
500 | while (c == ','); | |
501 | demand_empty_rest_of_line (); | |
502 | } | |
503 | ||
2e13b764 NC |
504 | static void |
505 | obj_elf_visibility (visibility) | |
506 | int visibility; | |
507 | { | |
508 | char *name; | |
509 | int c; | |
510 | symbolS *symbolP; | |
511 | asymbol *bfdsym; | |
512 | elf_symbol_type *elfsym; | |
513 | ||
514 | do | |
515 | { | |
516 | name = input_line_pointer; | |
517 | c = get_symbol_end (); | |
518 | symbolP = symbol_find_or_make (name); | |
519 | *input_line_pointer = c; | |
fa306131 | 520 | |
2e13b764 | 521 | SKIP_WHITESPACE (); |
fa306131 | 522 | |
2e13b764 NC |
523 | bfdsym = symbol_get_bfdsym (symbolP); |
524 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 525 | |
2e13b764 | 526 | assert (elfsym); |
fa306131 | 527 | |
2e13b764 | 528 | elfsym->internal_elf_sym.st_other = visibility; |
fa306131 | 529 | |
2e13b764 NC |
530 | if (c == ',') |
531 | { | |
532 | input_line_pointer ++; | |
fa306131 | 533 | |
2e13b764 | 534 | SKIP_WHITESPACE (); |
fa306131 | 535 | |
2e13b764 NC |
536 | if (*input_line_pointer == '\n') |
537 | c = '\n'; | |
538 | } | |
539 | } | |
540 | while (c == ','); | |
fa306131 | 541 | |
2e13b764 NC |
542 | demand_empty_rest_of_line (); |
543 | } | |
544 | ||
545 | ||
252b5132 RH |
546 | static segT previous_section; |
547 | static int previous_subsection; | |
548 | ||
9de8d8f1 RH |
549 | struct section_stack |
550 | { | |
551 | struct section_stack *next; | |
552 | segT seg, prev_seg; | |
553 | int subseg, prev_subseg; | |
554 | }; | |
555 | ||
556 | static struct section_stack *section_stack; | |
557 | ||
558 | ||
252b5132 RH |
559 | /* Handle the .section pseudo-op. This code supports two different |
560 | syntaxes. | |
561 | ||
562 | The first is found on Solaris, and looks like | |
563 | .section ".sec1",#alloc,#execinstr,#write | |
564 | Here the names after '#' are the SHF_* flags to turn on for the | |
565 | section. I'm not sure how it determines the SHT_* type (BFD | |
566 | doesn't really give us control over the type, anyhow). | |
567 | ||
568 | The second format is found on UnixWare, and probably most SVR4 | |
569 | machines, and looks like | |
570 | .section .sec1,"a",@progbits | |
571 | The quoted string may contain any combination of a, w, x, and | |
572 | represents the SHF_* flags to turn on for the section. The string | |
573 | beginning with '@' can be progbits or nobits. There should be | |
574 | other possibilities, but I don't know what they are. In any case, | |
575 | BFD doesn't really let us set the section type. */ | |
576 | ||
577 | /* Certain named sections have particular defined types, listed on p. | |
578 | 4-19 of the ABI. */ | |
579 | struct special_section | |
580 | { | |
581 | const char *name; | |
582 | int type; | |
583 | int attributes; | |
584 | }; | |
585 | ||
9de8d8f1 | 586 | static struct special_section const special_sections[] = |
252b5132 RH |
587 | { |
588 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
589 | { ".comment", SHT_PROGBITS, 0 }, | |
590 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
591 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
592 | { ".debug", SHT_PROGBITS, 0 }, | |
593 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
594 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
595 | { ".line", SHT_PROGBITS, 0 }, | |
596 | { ".note", SHT_NOTE, 0 }, | |
597 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
598 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
599 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
600 | ||
601 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
602 | ELF_TC_SPECIAL_SECTIONS | |
603 | #endif | |
604 | ||
605 | #if 0 | |
606 | /* The following section names are special, but they can not | |
607 | reasonably appear in assembler code. Some of the attributes are | |
608 | processor dependent. */ | |
609 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
610 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
611 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
612 | { ".got", SHT_PROGBITS, 0 }, | |
613 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
614 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
615 | { ".plt", SHT_PROGBITS, 0 }, | |
616 | { ".shstrtab",SHT_STRTAB, 0 }, | |
617 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
618 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
619 | #endif | |
620 | ||
621 | { NULL, 0, 0 } | |
622 | }; | |
623 | ||
624 | void | |
9de8d8f1 RH |
625 | obj_elf_change_section (name, type, attr, push) |
626 | char *name; | |
627 | int type, attr, push; | |
252b5132 | 628 | { |
742f45cf | 629 | asection *old_sec; |
252b5132 | 630 | segT sec; |
742f45cf AM |
631 | flagword flags; |
632 | int i; | |
252b5132 RH |
633 | |
634 | #ifdef md_flush_pending_output | |
635 | md_flush_pending_output (); | |
636 | #endif | |
637 | ||
9de8d8f1 RH |
638 | /* Switch to the section, creating it if necessary. */ |
639 | if (push) | |
640 | { | |
641 | struct section_stack *elt; | |
642 | elt = xmalloc (sizeof (struct section_stack)); | |
643 | elt->next = section_stack; | |
644 | elt->seg = now_seg; | |
645 | elt->prev_seg = previous_section; | |
646 | elt->subseg = now_subseg; | |
647 | elt->prev_subseg = previous_subsection; | |
648 | section_stack = elt; | |
649 | } | |
650 | previous_section = now_seg; | |
651 | previous_subsection = now_subseg; | |
652 | ||
742f45cf | 653 | old_sec = bfd_get_section_by_name (stdoutput, name); |
9de8d8f1 RH |
654 | sec = subseg_new (name, 0); |
655 | ||
742f45cf AM |
656 | /* See if this is one of the special sections. */ |
657 | for (i = 0; special_sections[i].name != NULL; i++) | |
658 | if (strcmp (name, special_sections[i].name) == 0) | |
659 | { | |
660 | if (type == SHT_NULL) | |
661 | type = special_sections[i].type; | |
662 | else if (type != special_sections[i].type) | |
663 | { | |
664 | if (old_sec == NULL) | |
9de8d8f1 | 665 | { |
742f45cf AM |
666 | as_warn (_("Setting incorrect section type for %s"), name); |
667 | } | |
668 | else | |
669 | { | |
670 | as_warn (_("Ignoring incorrect section type for %s"), name); | |
671 | type = special_sections[i].type; | |
9de8d8f1 | 672 | } |
9de8d8f1 | 673 | } |
742f45cf AM |
674 | if ((attr &~ special_sections[i].attributes) != 0 |
675 | && old_sec == NULL) | |
676 | { | |
677 | /* As a GNU extension, we permit a .note section to be | |
678 | allocatable. If the linker sees an allocateable .note | |
679 | section, it will create a PT_NOTE segment in the output | |
680 | file. */ | |
681 | if (strcmp (name, ".note") != 0 | |
682 | || attr != SHF_ALLOC) | |
683 | as_warn (_("Setting incorrect section attributes for %s"), | |
684 | name); | |
685 | } | |
686 | attr |= special_sections[i].attributes; | |
687 | break; | |
688 | } | |
689 | ||
690 | /* Convert ELF type and flags to BFD flags. */ | |
691 | flags = (SEC_RELOC | |
692 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
693 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
694 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
695 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)); | |
9de8d8f1 | 696 | #ifdef md_elf_section_flags |
742f45cf | 697 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
698 | #endif |
699 | ||
742f45cf AM |
700 | if (old_sec == NULL) |
701 | { | |
702 | symbolS *secsym; | |
703 | ||
9de8d8f1 RH |
704 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
705 | if (type == SHT_NOBITS) | |
706 | seg_info (sec)->bss = 1; | |
707 | ||
708 | bfd_set_section_flags (stdoutput, sec, flags); | |
709 | ||
710 | /* Add a symbol for this section to the symbol table. */ | |
711 | secsym = symbol_find (name); | |
712 | if (secsym != NULL) | |
713 | symbol_set_bfdsym (secsym, sec->symbol); | |
714 | else | |
715 | symbol_table_insert (section_symbol (sec)); | |
716 | } | |
742f45cf AM |
717 | else if (attr != 0) |
718 | { | |
719 | /* If section attributes are specified the second time we see a | |
720 | particular section, then check that they are the same as we | |
721 | saw the first time. */ | |
722 | if ((old_sec->flags ^ flags) | |
723 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
724 | | SEC_EXCLUDE | SEC_SORT_ENTRIES)) | |
725 | as_warn (_("Ignoring changed section attributes for %s"), name); | |
726 | } | |
9de8d8f1 RH |
727 | |
728 | #ifdef md_elf_section_change_hook | |
742f45cf | 729 | md_elf_section_change_hook (); |
9de8d8f1 RH |
730 | #endif |
731 | } | |
732 | ||
733 | int | |
734 | obj_elf_parse_section_letters (str, len) | |
735 | char *str; | |
736 | size_t len; | |
737 | { | |
738 | int attr = 0; | |
739 | ||
740 | while (len > 0) | |
741 | { | |
742 | switch (*str) | |
743 | { | |
744 | case 'a': | |
745 | attr |= SHF_ALLOC; | |
746 | break; | |
747 | case 'w': | |
748 | attr |= SHF_WRITE; | |
749 | break; | |
750 | case 'x': | |
751 | attr |= SHF_EXECINSTR; | |
752 | break; | |
753 | default: | |
754 | { | |
755 | char *bad_msg = _("Unrecognized .section attribute: want a,w,x"); | |
756 | #ifdef md_elf_section_letter | |
757 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
758 | if (md_attr >= 0) | |
759 | attr |= md_attr; | |
760 | else | |
761 | #endif | |
762 | { | |
4c63da97 | 763 | as_warn ("%s", bad_msg); |
9de8d8f1 RH |
764 | attr = -1; |
765 | } | |
766 | } | |
767 | break; | |
768 | } | |
769 | str++, len--; | |
770 | } | |
771 | ||
772 | return attr; | |
773 | } | |
774 | ||
775 | int | |
776 | obj_elf_section_word (str, len) | |
777 | char *str; | |
778 | size_t len; | |
779 | { | |
780 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
781 | return SHF_WRITE; | |
782 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
783 | return SHF_ALLOC; | |
784 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
785 | return SHF_EXECINSTR; | |
786 | ||
787 | #ifdef md_elf_section_word | |
788 | { | |
789 | int md_attr = md_elf_section_word (str, len); | |
790 | if (md_attr >= 0) | |
791 | return md_attr; | |
792 | } | |
793 | #endif | |
794 | ||
795 | as_warn (_("Unrecognized section attribute")); | |
796 | return 0; | |
797 | } | |
798 | ||
799 | int | |
800 | obj_elf_section_type (str, len) | |
801 | char *str; | |
802 | size_t len; | |
803 | { | |
804 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
805 | return SHT_PROGBITS; | |
806 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
807 | return SHT_NOBITS; | |
808 | ||
809 | #ifdef md_elf_section_type | |
810 | { | |
811 | int md_type = md_elf_section_type (str, len); | |
812 | if (md_type >= 0) | |
813 | return md_type; | |
814 | } | |
815 | #endif | |
816 | ||
817 | as_warn (_("Unrecognized section type")); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | void | |
822 | obj_elf_section (push) | |
823 | int push; | |
824 | { | |
825 | char *name, *beg, *end; | |
826 | int type, attr, dummy; | |
827 | ||
5b93d8bb | 828 | #ifndef TC_I370 |
252b5132 RH |
829 | if (flag_mri) |
830 | { | |
831 | char mri_type; | |
832 | ||
9de8d8f1 | 833 | #ifdef md_flush_pending_output |
60bcf0fa | 834 | md_flush_pending_output (); |
9de8d8f1 RH |
835 | #endif |
836 | ||
252b5132 RH |
837 | previous_section = now_seg; |
838 | previous_subsection = now_subseg; | |
839 | ||
840 | s_mri_sect (&mri_type); | |
841 | ||
842 | #ifdef md_elf_section_change_hook | |
843 | md_elf_section_change_hook (); | |
844 | #endif | |
845 | ||
846 | return; | |
847 | } | |
5b93d8bb | 848 | #endif /* ! defined (TC_I370) */ |
252b5132 RH |
849 | |
850 | /* Get name of section. */ | |
851 | SKIP_WHITESPACE (); | |
852 | if (*input_line_pointer == '"') | |
853 | { | |
9de8d8f1 RH |
854 | name = demand_copy_C_string (&dummy); |
855 | if (name == NULL) | |
252b5132 RH |
856 | { |
857 | ignore_rest_of_line (); | |
858 | return; | |
859 | } | |
860 | } | |
861 | else | |
862 | { | |
9de8d8f1 RH |
863 | end = input_line_pointer; |
864 | while (0 == strchr ("\n\t,; ", *end)) | |
865 | end++; | |
866 | if (end == input_line_pointer) | |
252b5132 RH |
867 | { |
868 | as_warn (_("Missing section name")); | |
869 | ignore_rest_of_line (); | |
870 | return; | |
871 | } | |
fa306131 | 872 | |
9de8d8f1 RH |
873 | name = xmalloc (end - input_line_pointer + 1); |
874 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
875 | name[end - input_line_pointer] = '\0'; | |
876 | input_line_pointer = end; | |
252b5132 | 877 | } |
252b5132 RH |
878 | SKIP_WHITESPACE (); |
879 | ||
880 | type = SHT_NULL; | |
881 | attr = 0; | |
882 | ||
883 | if (*input_line_pointer == ',') | |
884 | { | |
885 | /* Skip the comma. */ | |
886 | ++input_line_pointer; | |
252b5132 RH |
887 | SKIP_WHITESPACE (); |
888 | ||
889 | if (*input_line_pointer == '"') | |
890 | { | |
9de8d8f1 RH |
891 | beg = demand_copy_C_string (&dummy); |
892 | if (beg == NULL) | |
252b5132 | 893 | { |
9de8d8f1 RH |
894 | ignore_rest_of_line (); |
895 | return; | |
252b5132 | 896 | } |
9de8d8f1 | 897 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
898 | |
899 | SKIP_WHITESPACE (); | |
900 | if (*input_line_pointer == ',') | |
901 | { | |
9de8d8f1 | 902 | char c; |
252b5132 RH |
903 | ++input_line_pointer; |
904 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
905 | c = *input_line_pointer; |
906 | if (c == '"') | |
252b5132 | 907 | { |
9de8d8f1 RH |
908 | beg = demand_copy_C_string (&dummy); |
909 | if (beg == NULL) | |
252b5132 | 910 | { |
9de8d8f1 RH |
911 | ignore_rest_of_line (); |
912 | return; | |
252b5132 | 913 | } |
9de8d8f1 | 914 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
915 | } |
916 | else if (c == '@' || c == '%') | |
917 | { | |
918 | beg = ++input_line_pointer; | |
919 | c = get_symbol_end (); | |
920 | *input_line_pointer = c; | |
921 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 RH |
922 | } |
923 | } | |
924 | } | |
925 | else | |
926 | { | |
927 | do | |
928 | { | |
9de8d8f1 RH |
929 | char c; |
930 | ||
252b5132 RH |
931 | SKIP_WHITESPACE (); |
932 | if (*input_line_pointer != '#') | |
933 | { | |
934 | as_warn (_("Bad .section directive - character following name is not '#'")); | |
935 | ignore_rest_of_line (); | |
936 | return; | |
937 | } | |
9de8d8f1 RH |
938 | beg = ++input_line_pointer; |
939 | c = get_symbol_end (); | |
940 | *input_line_pointer = c; | |
941 | ||
942 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
943 | ||
252b5132 RH |
944 | SKIP_WHITESPACE (); |
945 | } | |
946 | while (*input_line_pointer++ == ','); | |
947 | --input_line_pointer; | |
948 | } | |
949 | } | |
950 | ||
252b5132 | 951 | demand_empty_rest_of_line (); |
9de8d8f1 RH |
952 | |
953 | obj_elf_change_section (name, type, attr, push); | |
252b5132 RH |
954 | } |
955 | ||
956 | /* Change to the .data section. */ | |
957 | ||
16b93d88 | 958 | void |
252b5132 RH |
959 | obj_elf_data (i) |
960 | int i; | |
961 | { | |
962 | #ifdef md_flush_pending_output | |
963 | md_flush_pending_output (); | |
964 | #endif | |
965 | ||
966 | previous_section = now_seg; | |
967 | previous_subsection = now_subseg; | |
968 | s_data (i); | |
969 | ||
970 | #ifdef md_elf_section_change_hook | |
971 | md_elf_section_change_hook (); | |
972 | #endif | |
973 | } | |
974 | ||
975 | /* Change to the .text section. */ | |
976 | ||
16b93d88 | 977 | void |
252b5132 RH |
978 | obj_elf_text (i) |
979 | int i; | |
980 | { | |
981 | #ifdef md_flush_pending_output | |
982 | md_flush_pending_output (); | |
983 | #endif | |
984 | ||
985 | previous_section = now_seg; | |
986 | previous_subsection = now_subseg; | |
987 | s_text (i); | |
988 | ||
989 | #ifdef md_elf_section_change_hook | |
990 | md_elf_section_change_hook (); | |
991 | #endif | |
992 | } | |
993 | ||
994 | static void | |
995 | obj_elf_subsection (ignore) | |
ab9da554 | 996 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
997 | { |
998 | register int temp; | |
999 | ||
1000 | #ifdef md_flush_pending_output | |
1001 | md_flush_pending_output (); | |
1002 | #endif | |
1003 | ||
1004 | previous_section = now_seg; | |
1005 | previous_subsection = now_subseg; | |
1006 | ||
1007 | temp = get_absolute_expression (); | |
1008 | subseg_set (now_seg, (subsegT) temp); | |
1009 | demand_empty_rest_of_line (); | |
1010 | ||
1011 | #ifdef md_elf_section_change_hook | |
1012 | md_elf_section_change_hook (); | |
1013 | #endif | |
1014 | } | |
1015 | ||
1016 | /* This can be called from the processor backends if they change | |
1017 | sections. */ | |
1018 | ||
1019 | void | |
1020 | obj_elf_section_change_hook () | |
1021 | { | |
1022 | previous_section = now_seg; | |
1023 | previous_subsection = now_subseg; | |
1024 | } | |
1025 | ||
1026 | void | |
1027 | obj_elf_previous (ignore) | |
ab9da554 | 1028 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1029 | { |
9de8d8f1 RH |
1030 | segT new_section; |
1031 | int new_subsection; | |
1032 | ||
252b5132 RH |
1033 | if (previous_section == 0) |
1034 | { | |
1035 | as_bad (_(".previous without corresponding .section; ignored")); | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | #ifdef md_flush_pending_output | |
1040 | md_flush_pending_output (); | |
1041 | #endif | |
1042 | ||
9de8d8f1 RH |
1043 | new_section = previous_section; |
1044 | new_subsection = previous_subsection; | |
1045 | previous_section = now_seg; | |
1046 | previous_subsection = now_subseg; | |
1047 | subseg_set (new_section, new_subsection); | |
1048 | ||
1049 | #ifdef md_elf_section_change_hook | |
1050 | md_elf_section_change_hook (); | |
1051 | #endif | |
1052 | } | |
1053 | ||
1054 | static void | |
1055 | obj_elf_popsection (xxx) | |
ab9da554 | 1056 | int xxx ATTRIBUTE_UNUSED; |
9de8d8f1 RH |
1057 | { |
1058 | struct section_stack *top = section_stack; | |
1059 | ||
1060 | if (top == NULL) | |
1061 | { | |
1062 | as_bad (_(".popsection without corresponding .pushsection; ignored")); | |
1063 | return; | |
1064 | } | |
1065 | ||
1066 | #ifdef md_flush_pending_output | |
1067 | md_flush_pending_output (); | |
1068 | #endif | |
1069 | ||
1070 | section_stack = top->next; | |
1071 | previous_section = top->prev_seg; | |
1072 | previous_subsection = top->prev_subseg; | |
1073 | subseg_set (top->seg, top->subseg); | |
1074 | free (top); | |
252b5132 RH |
1075 | |
1076 | #ifdef md_elf_section_change_hook | |
1077 | md_elf_section_change_hook (); | |
1078 | #endif | |
1079 | } | |
1080 | ||
1081 | static void | |
1082 | obj_elf_line (ignore) | |
ab9da554 | 1083 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1084 | { |
1085 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
1086 | delightful bug, so we are not being incompatible here. */ | |
1087 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); | |
1088 | demand_empty_rest_of_line (); | |
1089 | } | |
1090 | ||
1091 | /* This handles the .symver pseudo-op, which is used to specify a | |
1092 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1093 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1094 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1095 | with the same value as the symbol NAME. */ | |
1096 | ||
1097 | static void | |
1098 | obj_elf_symver (ignore) | |
ab9da554 | 1099 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1100 | { |
1101 | char *name; | |
1102 | char c; | |
1103 | symbolS *sym; | |
1104 | ||
1105 | name = input_line_pointer; | |
1106 | c = get_symbol_end (); | |
1107 | ||
1108 | sym = symbol_find_or_make (name); | |
1109 | ||
1110 | *input_line_pointer = c; | |
1111 | ||
49309057 | 1112 | if (symbol_get_obj (sym)->versioned_name != NULL) |
252b5132 RH |
1113 | { |
1114 | as_bad (_("multiple .symver directives for symbol `%s'"), | |
1115 | S_GET_NAME (sym)); | |
1116 | ignore_rest_of_line (); | |
1117 | return; | |
1118 | } | |
1119 | ||
1120 | SKIP_WHITESPACE (); | |
1121 | if (*input_line_pointer != ',') | |
1122 | { | |
1123 | as_bad (_("expected comma after name in .symver")); | |
1124 | ignore_rest_of_line (); | |
1125 | return; | |
1126 | } | |
1127 | ||
1128 | ++input_line_pointer; | |
1129 | name = input_line_pointer; | |
1130 | while (1) | |
1131 | { | |
1132 | c = get_symbol_end (); | |
1133 | if (c != ELF_VER_CHR) | |
1134 | break; | |
1135 | *input_line_pointer++ = c; | |
1136 | } | |
1137 | ||
49309057 | 1138 | symbol_get_obj (sym)->versioned_name = xstrdup (name); |
252b5132 RH |
1139 | |
1140 | *input_line_pointer = c; | |
1141 | ||
49309057 | 1142 | if (strchr (symbol_get_obj (sym)->versioned_name, ELF_VER_CHR) == NULL) |
252b5132 RH |
1143 | { |
1144 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
49309057 | 1145 | symbol_get_obj (sym)->versioned_name, S_GET_NAME (sym)); |
252b5132 RH |
1146 | ignore_rest_of_line (); |
1147 | return; | |
1148 | } | |
1149 | ||
1150 | demand_empty_rest_of_line (); | |
1151 | } | |
1152 | ||
1153 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1154 | to the linker the hierarchy in which a particular table resides. The | |
1155 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1156 | ||
904a31bf | 1157 | struct fix * |
252b5132 | 1158 | obj_elf_vtable_inherit (ignore) |
ab9da554 | 1159 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1160 | { |
1161 | char *cname, *pname; | |
1162 | symbolS *csym, *psym; | |
1163 | char c, bad = 0; | |
1164 | ||
1165 | if (*input_line_pointer == '#') | |
1166 | ++input_line_pointer; | |
1167 | ||
1168 | cname = input_line_pointer; | |
1169 | c = get_symbol_end (); | |
1170 | csym = symbol_find (cname); | |
1171 | ||
1172 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1173 | the same child symbol. Also, we can currently only do this if the | |
1174 | child symbol is already exists and is placed in a fragment. */ | |
1175 | ||
49309057 | 1176 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 RH |
1177 | { |
1178 | as_bad ("expected `%s' to have already been set for .vtable_inherit", | |
1179 | cname); | |
1180 | bad = 1; | |
1181 | } | |
1182 | ||
1183 | *input_line_pointer = c; | |
1184 | ||
1185 | SKIP_WHITESPACE (); | |
1186 | if (*input_line_pointer != ',') | |
1187 | { | |
1188 | as_bad ("expected comma after name in .vtable_inherit"); | |
1189 | ignore_rest_of_line (); | |
904a31bf | 1190 | return NULL; |
252b5132 RH |
1191 | } |
1192 | ||
1193 | ++input_line_pointer; | |
1194 | SKIP_WHITESPACE (); | |
1195 | ||
1196 | if (*input_line_pointer == '#') | |
1197 | ++input_line_pointer; | |
1198 | ||
1199 | if (input_line_pointer[0] == '0' | |
1200 | && (input_line_pointer[1] == '\0' | |
d9a62219 | 1201 | || isspace ((unsigned char) input_line_pointer[1]))) |
252b5132 RH |
1202 | { |
1203 | psym = section_symbol (absolute_section); | |
1204 | ++input_line_pointer; | |
1205 | } | |
1206 | else | |
1207 | { | |
1208 | pname = input_line_pointer; | |
1209 | c = get_symbol_end (); | |
1210 | psym = symbol_find_or_make (pname); | |
1211 | *input_line_pointer = c; | |
1212 | } | |
1213 | ||
1214 | demand_empty_rest_of_line (); | |
1215 | ||
1216 | if (bad) | |
904a31bf | 1217 | return NULL; |
252b5132 | 1218 | |
49309057 | 1219 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1220 | return fix_new (symbol_get_frag (csym), |
1221 | symbol_get_value_expression (csym)->X_add_number, | |
1222 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1223 | } |
fa306131 | 1224 | |
252b5132 RH |
1225 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1226 | to the linker that a vtable slot was used. The syntax is | |
1227 | ".vtable_entry tablename, offset". */ | |
1228 | ||
904a31bf | 1229 | struct fix * |
252b5132 | 1230 | obj_elf_vtable_entry (ignore) |
ab9da554 | 1231 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1232 | { |
1233 | char *name; | |
1234 | symbolS *sym; | |
1235 | offsetT offset; | |
1236 | char c; | |
1237 | ||
1238 | if (*input_line_pointer == '#') | |
1239 | ++input_line_pointer; | |
1240 | ||
1241 | name = input_line_pointer; | |
1242 | c = get_symbol_end (); | |
1243 | sym = symbol_find_or_make (name); | |
1244 | *input_line_pointer = c; | |
1245 | ||
1246 | SKIP_WHITESPACE (); | |
1247 | if (*input_line_pointer != ',') | |
1248 | { | |
1249 | as_bad ("expected comma after name in .vtable_entry"); | |
1250 | ignore_rest_of_line (); | |
904a31bf | 1251 | return NULL; |
252b5132 RH |
1252 | } |
1253 | ||
1254 | ++input_line_pointer; | |
1255 | if (*input_line_pointer == '#') | |
1256 | ++input_line_pointer; | |
1257 | ||
1258 | offset = get_absolute_expression (); | |
1259 | ||
252b5132 | 1260 | demand_empty_rest_of_line (); |
904a31bf AM |
1261 | |
1262 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1263 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1264 | } |
1265 | ||
1266 | void | |
4c63da97 | 1267 | elf_obj_read_begin_hook () |
252b5132 RH |
1268 | { |
1269 | #ifdef NEED_ECOFF_DEBUG | |
1270 | if (ECOFF_DEBUGGING) | |
1271 | ecoff_read_begin_hook (); | |
1272 | #endif | |
1273 | } | |
1274 | ||
1275 | void | |
4c63da97 | 1276 | elf_obj_symbol_new_hook (symbolP) |
252b5132 RH |
1277 | symbolS *symbolP; |
1278 | { | |
49309057 ILT |
1279 | struct elf_obj_sy *sy_obj; |
1280 | ||
1281 | sy_obj = symbol_get_obj (symbolP); | |
1282 | sy_obj->size = NULL; | |
1283 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1284 | |
1285 | #ifdef NEED_ECOFF_DEBUG | |
1286 | if (ECOFF_DEBUGGING) | |
1287 | ecoff_symbol_new_hook (symbolP); | |
1288 | #endif | |
1289 | } | |
1290 | ||
1291 | void | |
1292 | obj_elf_version (ignore) | |
ab9da554 | 1293 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1294 | { |
1295 | char *name; | |
1296 | unsigned int c; | |
1297 | char ch; | |
1298 | char *p; | |
1299 | asection *seg = now_seg; | |
1300 | subsegT subseg = now_subseg; | |
1301 | Elf_Internal_Note i_note; | |
1302 | Elf_External_Note e_note; | |
1303 | asection *note_secp = (asection *) NULL; | |
1304 | int i, len; | |
1305 | ||
1306 | SKIP_WHITESPACE (); | |
1307 | if (*input_line_pointer == '\"') | |
1308 | { | |
1309 | ++input_line_pointer; /* -> 1st char of string. */ | |
1310 | name = input_line_pointer; | |
1311 | ||
1312 | while (is_a_char (c = next_char_of_string ())) | |
1313 | ; | |
1314 | c = *input_line_pointer; | |
1315 | *input_line_pointer = '\0'; | |
1316 | *(input_line_pointer - 1) = '\0'; | |
1317 | *input_line_pointer = c; | |
1318 | ||
1319 | /* create the .note section */ | |
1320 | ||
1321 | note_secp = subseg_new (".note", 0); | |
1322 | bfd_set_section_flags (stdoutput, | |
1323 | note_secp, | |
1324 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1325 | ||
1326 | /* process the version string */ | |
1327 | ||
1328 | len = strlen (name); | |
1329 | ||
1330 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ | |
1331 | i_note.descsz = 0; /* no description */ | |
1332 | i_note.type = NT_VERSION; | |
1333 | p = frag_more (sizeof (e_note.namesz)); | |
1334 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1335 | p = frag_more (sizeof (e_note.descsz)); | |
1336 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1337 | p = frag_more (sizeof (e_note.type)); | |
1338 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1339 | ||
1340 | for (i = 0; i < len; i++) | |
1341 | { | |
1342 | ch = *(name + i); | |
1343 | { | |
1344 | FRAG_APPEND_1_CHAR (ch); | |
1345 | } | |
1346 | } | |
1347 | frag_align (2, 0, 0); | |
1348 | ||
1349 | subseg_set (seg, subseg); | |
1350 | } | |
1351 | else | |
1352 | { | |
1353 | as_bad (_("Expected quoted string")); | |
1354 | } | |
1355 | demand_empty_rest_of_line (); | |
1356 | } | |
1357 | ||
1358 | static void | |
1359 | obj_elf_size (ignore) | |
ab9da554 | 1360 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1361 | { |
1362 | char *name = input_line_pointer; | |
1363 | char c = get_symbol_end (); | |
1364 | char *p; | |
1365 | expressionS exp; | |
1366 | symbolS *sym; | |
1367 | ||
1368 | p = input_line_pointer; | |
1369 | *p = c; | |
1370 | SKIP_WHITESPACE (); | |
1371 | if (*input_line_pointer != ',') | |
1372 | { | |
1373 | *p = 0; | |
1374 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1375 | *p = c; | |
1376 | ignore_rest_of_line (); | |
1377 | return; | |
1378 | } | |
1379 | input_line_pointer++; | |
1380 | expression (&exp); | |
1381 | if (exp.X_op == O_absent) | |
1382 | { | |
1383 | as_bad (_("missing expression in .size directive")); | |
1384 | exp.X_op = O_constant; | |
1385 | exp.X_add_number = 0; | |
1386 | } | |
1387 | *p = 0; | |
1388 | sym = symbol_find_or_make (name); | |
1389 | *p = c; | |
1390 | if (exp.X_op == O_constant) | |
1391 | S_SET_SIZE (sym, exp.X_add_number); | |
1392 | else | |
1393 | { | |
49309057 ILT |
1394 | symbol_get_obj (sym)->size = |
1395 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1396 | *symbol_get_obj (sym)->size = exp; | |
252b5132 RH |
1397 | } |
1398 | demand_empty_rest_of_line (); | |
1399 | } | |
1400 | ||
1401 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1402 | There are five syntaxes: |
fa306131 | 1403 | |
252b5132 RH |
1404 | The first (used on Solaris) is |
1405 | .type SYM,#function | |
1406 | The second (used on UnixWare) is | |
1407 | .type SYM,@function | |
1408 | The third (reportedly to be used on Irix 6.0) is | |
1409 | .type SYM STT_FUNC | |
1410 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1411 | .type SYM,%function | |
aa8c34c3 JE |
1412 | The fifth (used on SVR4/860) is |
1413 | .type SYM,"function" | |
252b5132 RH |
1414 | */ |
1415 | ||
1416 | static void | |
1417 | obj_elf_type (ignore) | |
ab9da554 | 1418 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1419 | { |
1420 | char *name; | |
1421 | char c; | |
1422 | int type; | |
1423 | const char *typename; | |
1424 | symbolS *sym; | |
904a31bf | 1425 | elf_symbol_type *elfsym; |
252b5132 RH |
1426 | |
1427 | name = input_line_pointer; | |
1428 | c = get_symbol_end (); | |
1429 | sym = symbol_find_or_make (name); | |
904a31bf | 1430 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1431 | *input_line_pointer = c; |
1432 | ||
1433 | SKIP_WHITESPACE (); | |
1434 | if (*input_line_pointer == ',') | |
1435 | ++input_line_pointer; | |
1436 | ||
1437 | SKIP_WHITESPACE (); | |
1438 | if ( *input_line_pointer == '#' | |
1439 | || *input_line_pointer == '@' | |
aa8c34c3 | 1440 | || *input_line_pointer == '"' |
252b5132 RH |
1441 | || *input_line_pointer == '%') |
1442 | ++input_line_pointer; | |
1443 | ||
1444 | typename = input_line_pointer; | |
1445 | c = get_symbol_end (); | |
1446 | ||
1447 | type = 0; | |
1448 | if (strcmp (typename, "function") == 0 | |
1449 | || strcmp (typename, "STT_FUNC") == 0) | |
1450 | type = BSF_FUNCTION; | |
1451 | else if (strcmp (typename, "object") == 0 | |
1452 | || strcmp (typename, "STT_OBJECT") == 0) | |
1453 | type = BSF_OBJECT; | |
904a31bf AM |
1454 | #ifdef md_elf_symbol_type |
1455 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1456 | ; | |
1457 | #endif | |
252b5132 RH |
1458 | else |
1459 | as_bad (_("ignoring unrecognized symbol type \"%s\""), typename); | |
1460 | ||
1461 | *input_line_pointer = c; | |
1462 | ||
aa8c34c3 JE |
1463 | if (*input_line_pointer == '"') |
1464 | ++input_line_pointer; | |
1465 | ||
904a31bf | 1466 | elfsym->symbol.flags |= type; |
252b5132 RH |
1467 | |
1468 | demand_empty_rest_of_line (); | |
1469 | } | |
1470 | ||
1471 | static void | |
1472 | obj_elf_ident (ignore) | |
ab9da554 | 1473 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1474 | { |
1475 | static segT comment_section; | |
1476 | segT old_section = now_seg; | |
1477 | int old_subsection = now_subseg; | |
1478 | ||
5f91fe03 ILT |
1479 | #ifdef md_flush_pending_output |
1480 | md_flush_pending_output (); | |
1481 | #endif | |
1482 | ||
252b5132 RH |
1483 | if (!comment_section) |
1484 | { | |
1485 | char *p; | |
1486 | comment_section = subseg_new (".comment", 0); | |
1487 | bfd_set_section_flags (stdoutput, comment_section, | |
1488 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1489 | p = frag_more (1); | |
1490 | *p = 0; | |
1491 | } | |
1492 | else | |
1493 | subseg_set (comment_section, 0); | |
1494 | stringer (1); | |
1495 | subseg_set (old_section, old_subsection); | |
1496 | } | |
1497 | ||
1498 | #ifdef INIT_STAB_SECTION | |
1499 | ||
1500 | /* The first entry in a .stabs section is special. */ | |
1501 | ||
1502 | void | |
1503 | obj_elf_init_stab_section (seg) | |
1504 | segT seg; | |
1505 | { | |
1506 | char *file; | |
1507 | char *p; | |
1508 | char *stabstr_name; | |
1509 | unsigned int stroff; | |
1510 | ||
1511 | /* Force the section to align to a longword boundary. Without this, | |
1512 | UnixWare ar crashes. */ | |
1513 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1514 | ||
1515 | /* Make space for this first symbol. */ | |
1516 | p = frag_more (12); | |
1517 | /* Zero it out. */ | |
1518 | memset (p, 0, 12); | |
1519 | as_where (&file, (unsigned int *) NULL); | |
1520 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); | |
1521 | strcpy (stabstr_name, segment_name (seg)); | |
1522 | strcat (stabstr_name, "str"); | |
1523 | stroff = get_stab_string_offset (file, stabstr_name); | |
1524 | know (stroff == 1); | |
1525 | md_number_to_chars (p, stroff, 4); | |
1526 | seg_info (seg)->stabu.p = p; | |
1527 | } | |
1528 | ||
1529 | #endif | |
1530 | ||
1531 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1532 | ||
1533 | static void | |
1534 | adjust_stab_sections (abfd, sec, xxx) | |
1535 | bfd *abfd; | |
1536 | asection *sec; | |
ab9da554 | 1537 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1538 | { |
1539 | char *name; | |
1540 | asection *strsec; | |
1541 | char *p; | |
1542 | int strsz, nsyms; | |
1543 | ||
1544 | if (strncmp (".stab", sec->name, 5)) | |
1545 | return; | |
1546 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1547 | return; | |
1548 | ||
1549 | name = (char *) alloca (strlen (sec->name) + 4); | |
1550 | strcpy (name, sec->name); | |
1551 | strcat (name, "str"); | |
1552 | strsec = bfd_get_section_by_name (abfd, name); | |
1553 | if (strsec) | |
1554 | strsz = bfd_section_size (abfd, strsec); | |
1555 | else | |
1556 | strsz = 0; | |
1557 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1558 | ||
1559 | p = seg_info (sec)->stabu.p; | |
1560 | assert (p != 0); | |
1561 | ||
1562 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); | |
1563 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
1564 | } | |
1565 | ||
1566 | #ifdef NEED_ECOFF_DEBUG | |
1567 | ||
1568 | /* This function is called by the ECOFF code. It is supposed to | |
1569 | record the external symbol information so that the backend can | |
1570 | write it out correctly. The ELF backend doesn't actually handle | |
1571 | this at the moment, so we do it ourselves. We save the information | |
1572 | in the symbol. */ | |
1573 | ||
1574 | void | |
1575 | elf_ecoff_set_ext (sym, ext) | |
1576 | symbolS *sym; | |
1577 | struct ecoff_extr *ext; | |
1578 | { | |
49309057 | 1579 | symbol_get_bfdsym (sym)->udata.p = (PTR) ext; |
252b5132 RH |
1580 | } |
1581 | ||
1582 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1583 | supposed to *EXT to the external symbol information, and return | |
1584 | whether the symbol should be used at all. */ | |
1585 | ||
1586 | static boolean | |
1587 | elf_get_extr (sym, ext) | |
1588 | asymbol *sym; | |
1589 | EXTR *ext; | |
1590 | { | |
1591 | if (sym->udata.p == NULL) | |
1592 | return false; | |
1593 | *ext = *(EXTR *) sym->udata.p; | |
1594 | return true; | |
1595 | } | |
1596 | ||
1597 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1598 | nothing to do for ELF. */ | |
1599 | ||
1600 | /*ARGSUSED*/ | |
1601 | static void | |
1602 | elf_set_index (sym, indx) | |
5f91fe03 ILT |
1603 | asymbol *sym ATTRIBUTE_UNUSED; |
1604 | bfd_size_type indx ATTRIBUTE_UNUSED; | |
252b5132 RH |
1605 | { |
1606 | } | |
1607 | ||
1608 | #endif /* NEED_ECOFF_DEBUG */ | |
1609 | ||
1610 | void | |
1611 | elf_frob_symbol (symp, puntp) | |
1612 | symbolS *symp; | |
1613 | int *puntp; | |
1614 | { | |
49309057 ILT |
1615 | struct elf_obj_sy *sy_obj; |
1616 | ||
252b5132 RH |
1617 | #ifdef NEED_ECOFF_DEBUG |
1618 | if (ECOFF_DEBUGGING) | |
1619 | ecoff_frob_symbol (symp); | |
1620 | #endif | |
1621 | ||
49309057 ILT |
1622 | sy_obj = symbol_get_obj (symp); |
1623 | ||
1624 | if (sy_obj->size != NULL) | |
252b5132 | 1625 | { |
49309057 | 1626 | switch (sy_obj->size->X_op) |
252b5132 RH |
1627 | { |
1628 | case O_subtract: | |
1629 | S_SET_SIZE (symp, | |
49309057 ILT |
1630 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1631 | + sy_obj->size->X_add_number | |
1632 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1633 | break; |
1634 | case O_constant: | |
1635 | S_SET_SIZE (symp, | |
49309057 ILT |
1636 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1637 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1638 | break; |
1639 | default: | |
1640 | as_bad (_(".size expression too complicated to fix up")); | |
1641 | break; | |
1642 | } | |
49309057 ILT |
1643 | free (sy_obj->size); |
1644 | sy_obj->size = NULL; | |
252b5132 RH |
1645 | } |
1646 | ||
49309057 | 1647 | if (sy_obj->versioned_name != NULL) |
252b5132 RH |
1648 | { |
1649 | /* This symbol was given a new name with the .symver directive. | |
1650 | ||
1651 | If this is an external reference, just rename the symbol to | |
1652 | include the version string. This will make the relocs be | |
1653 | against the correct versioned symbol. | |
1654 | ||
1655 | If this is a definition, add an alias. FIXME: Using an alias | |
1656 | will permit the debugging information to refer to the right | |
1657 | symbol. However, it's not clear whether it is the best | |
1658 | approach. */ | |
1659 | ||
1660 | if (! S_IS_DEFINED (symp)) | |
1661 | { | |
1662 | char *p; | |
1663 | ||
1664 | /* Verify that the name isn't using the @@ syntax--this is | |
1665 | reserved for definitions of the default version to link | |
1666 | against. */ | |
49309057 | 1667 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); |
252b5132 RH |
1668 | know (p != NULL); |
1669 | if (p[1] == ELF_VER_CHR) | |
1670 | { | |
1671 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1672 | sy_obj->versioned_name); |
252b5132 RH |
1673 | *puntp = true; |
1674 | } | |
49309057 | 1675 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1676 | } |
1677 | else | |
1678 | { | |
1679 | symbolS *symp2; | |
1680 | ||
1681 | /* FIXME: Creating a new symbol here is risky. We're in the | |
1682 | final loop over the symbol table. We can get away with | |
1683 | it only because the symbol goes to the end of the list, | |
1684 | where the loop will still see it. It would probably be | |
1685 | better to do this in obj_frob_file_before_adjust. */ | |
1686 | ||
49309057 | 1687 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 RH |
1688 | |
1689 | /* Now we act as though we saw symp2 = sym. */ | |
1690 | ||
1691 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); | |
1692 | ||
1693 | /* Subtracting out the frag address here is a hack because | |
1694 | we are in the middle of the final loop. */ | |
49309057 ILT |
1695 | S_SET_VALUE (symp2, |
1696 | (S_GET_VALUE (symp) | |
1697 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1698 | |
49309057 | 1699 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 RH |
1700 | |
1701 | /* This will copy over the size information. */ | |
1702 | copy_symbol_attributes (symp2, symp); | |
1703 | ||
1704 | if (S_IS_WEAK (symp)) | |
1705 | S_SET_WEAK (symp2); | |
1706 | ||
1707 | if (S_IS_EXTERNAL (symp)) | |
1708 | S_SET_EXTERNAL (symp2); | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | /* Double check weak symbols. */ | |
49309057 | 1713 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1714 | { |
1715 | if (S_IS_COMMON (symp)) | |
1716 | as_bad (_("Symbol `%s' can not be both weak and common"), | |
1717 | S_GET_NAME (symp)); | |
1718 | } | |
1719 | ||
1720 | #ifdef TC_MIPS | |
1721 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1722 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1723 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1724 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1725 | because that is the only time gcc will generate the necessary | |
1726 | .global directives to mark functions. */ | |
1727 | ||
1728 | if (S_IS_COMMON (symp)) | |
49309057 | 1729 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1730 | |
1731 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1732 | && ! S_IS_DEFINED (symp) |
1733 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1734 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 RH |
1735 | #endif |
1736 | ||
c5e54cc2 ILT |
1737 | #if 0 /* TC_PPC */ |
1738 | /* If TC_PPC is defined, we used to force the type of a symbol to be | |
1739 | BSF_OBJECT if it was otherwise unset. This was required by some | |
1740 | version of VxWorks. Thomas de Lellis <tdel@windriver.com> says | |
1741 | that this is no longer needed, so it is now commented out. */ | |
49309057 ILT |
1742 | if ((symbol_get_bfdsym (symp)->flags |
1743 | & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 | |
252b5132 | 1744 | && S_IS_DEFINED (symp)) |
49309057 | 1745 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1746 | #endif |
1747 | } | |
1748 | ||
1749 | void | |
1750 | elf_frob_file () | |
1751 | { | |
1752 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); | |
1753 | ||
1754 | #ifdef elf_tc_final_processing | |
1755 | elf_tc_final_processing (); | |
1756 | #endif | |
1757 | } | |
1758 | ||
1759 | /* It is required that we let write_relocs have the opportunity to | |
1760 | optimize away fixups before output has begun, since it is possible | |
1761 | to eliminate all fixups for a section and thus we never should | |
1762 | have generated the relocation section. */ | |
1763 | ||
1764 | void | |
1765 | elf_frob_file_after_relocs () | |
1766 | { | |
1767 | #ifdef NEED_ECOFF_DEBUG | |
1768 | if (ECOFF_DEBUGGING) | |
1769 | /* Generate the ECOFF debugging information. */ | |
1770 | { | |
1771 | const struct ecoff_debug_swap *debug_swap; | |
1772 | struct ecoff_debug_info debug; | |
1773 | char *buf; | |
1774 | asection *sec; | |
1775 | ||
1776 | debug_swap | |
1777 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1778 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1779 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1780 | ||
1781 | /* Set up the pointers in debug. */ | |
1782 | #define SET(ptr, offset, type) \ | |
1783 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1784 | ||
1785 | SET (line, cbLineOffset, unsigned char *); | |
1786 | SET (external_dnr, cbDnOffset, PTR); | |
1787 | SET (external_pdr, cbPdOffset, PTR); | |
1788 | SET (external_sym, cbSymOffset, PTR); | |
1789 | SET (external_opt, cbOptOffset, PTR); | |
1790 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1791 | SET (ss, cbSsOffset, char *); | |
1792 | SET (external_fdr, cbFdOffset, PTR); | |
1793 | SET (external_rfd, cbRfdOffset, PTR); | |
1794 | /* ssext and external_ext are set up just below. */ | |
1795 | ||
1796 | #undef SET | |
1797 | ||
1798 | /* Set up the external symbols. */ | |
1799 | debug.ssext = debug.ssext_end = NULL; | |
1800 | debug.external_ext = debug.external_ext_end = NULL; | |
1801 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1802 | elf_get_extr, elf_set_index)) | |
1803 | as_fatal (_("Failed to set up debugging information: %s"), | |
1804 | bfd_errmsg (bfd_get_error ())); | |
1805 | ||
1806 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1807 | assert (sec != NULL); | |
1808 | ||
1809 | know (stdoutput->output_has_begun == false); | |
1810 | ||
1811 | /* We set the size of the section, call bfd_set_section_contents | |
1812 | to force the ELF backend to allocate a file position, and then | |
1813 | write out the data. FIXME: Is this really the best way to do | |
1814 | this? */ | |
1815 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1816 | ||
5f91fe03 ILT |
1817 | /* Pass BUF to bfd_set_section_contents because this will |
1818 | eventually become a call to fwrite, and ISO C prohibits | |
1819 | passing a NULL pointer to a stdio function even if the | |
1820 | pointer will not be used. */ | |
1821 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf, | |
252b5132 RH |
1822 | (file_ptr) 0, (bfd_size_type) 0)) |
1823 | as_fatal (_("Can't start writing .mdebug section: %s"), | |
1824 | bfd_errmsg (bfd_get_error ())); | |
1825 | ||
1826 | know (stdoutput->output_has_begun == true); | |
1827 | know (sec->filepos != 0); | |
1828 | ||
1829 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1830 | sec->filepos)) | |
1831 | as_fatal (_("Could not write .mdebug section: %s"), | |
1832 | bfd_errmsg (bfd_get_error ())); | |
1833 | } | |
1834 | #endif /* NEED_ECOFF_DEBUG */ | |
1835 | } | |
1836 | ||
1837 | #ifdef SCO_ELF | |
1838 | ||
1839 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1840 | SCO specific identifier in the .notes section to satisfy the SCO | |
1841 | linker. | |
1842 | ||
1843 | This looks more complicated than it really is. As opposed to the | |
1844 | "obvious" solution, this should handle the cross dev cases | |
1845 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1846 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1847 | should be exactly one of these sections per object module. | |
1848 | ||
1849 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
1850 | .note section. | |
1851 | ||
fa306131 AM |
1852 | int_32 namesz = 4 ; Name size |
1853 | int_32 descsz = 12 ; Descriptive information | |
1854 | int_32 type = 1 ; | |
1855 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
1856 | int_32 version = (major ver # << 16) | version of tools ; |
1857 | int_32 source = (tool_id << 16 ) | 1 ; | |
1858 | int_32 info = 0 ; These are set by the SCO tools, but we | |
fa306131 | 1859 | don't know enough about the source |
252b5132 RH |
1860 | environment to set them. SCO ld currently |
1861 | ignores them, and recommends we set them | |
1862 | to zero. */ | |
1863 | ||
1864 | #define SCO_MAJOR_VERSION 0x1 | |
1865 | #define SCO_MINOR_VERSION 0x1 | |
1866 | ||
1867 | void | |
1868 | sco_id () | |
1869 | { | |
1870 | ||
1871 | char *name; | |
1872 | unsigned int c; | |
1873 | char ch; | |
1874 | char *p; | |
1875 | asection *seg = now_seg; | |
1876 | subsegT subseg = now_subseg; | |
1877 | Elf_Internal_Note i_note; | |
1878 | Elf_External_Note e_note; | |
1879 | asection *note_secp = (asection *) NULL; | |
1880 | int i, len; | |
1881 | ||
1882 | /* create the .note section */ | |
1883 | ||
1884 | note_secp = subseg_new (".note", 0); | |
1885 | bfd_set_section_flags (stdoutput, | |
1886 | note_secp, | |
1887 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1888 | ||
1889 | /* process the version string */ | |
1890 | ||
fa306131 | 1891 | i_note.namesz = 4; |
252b5132 RH |
1892 | i_note.descsz = 12; /* 12 descriptive bytes */ |
1893 | i_note.type = NT_VERSION; /* Contains a version string */ | |
1894 | ||
1895 | p = frag_more (sizeof (i_note.namesz)); | |
1896 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1897 | ||
1898 | p = frag_more (sizeof (i_note.descsz)); | |
1899 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1900 | ||
1901 | p = frag_more (sizeof (i_note.type)); | |
1902 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1903 | ||
1904 | p = frag_more (4); | |
fa306131 | 1905 | strcpy (p, "SCO"); |
252b5132 RH |
1906 | |
1907 | /* Note: this is the version number of the ELF we're representing */ | |
1908 | p = frag_more (4); | |
1909 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
1910 | ||
1911 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
1912 | it with SCO. The bottom bit shows that we are compat with the | |
1913 | SCO ABI. */ | |
1914 | p = frag_more (4); | |
1915 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
1916 | ||
1917 | /* If we knew (or cared) what the source language options were, we'd | |
1918 | fill them in here. SCO has given us permission to ignore these | |
1919 | and just set them to zero. */ | |
1920 | p = frag_more (4); | |
1921 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 1922 | |
252b5132 RH |
1923 | frag_align (2, 0, 0); |
1924 | ||
1925 | /* We probably can't restore the current segment, for there likely | |
1926 | isn't one yet... */ | |
1927 | if (seg && subseg) | |
1928 | subseg_set (seg, subseg); | |
1929 | ||
1930 | } | |
1931 | ||
1932 | #endif /* SCO_ELF */ | |
1933 | ||
5110c57e HPN |
1934 | static int |
1935 | elf_separate_stab_sections () | |
1936 | { | |
1937 | #ifdef NEED_ECOFF_DEBUG | |
1938 | return (!ECOFF_DEBUGGING); | |
1939 | #else | |
1940 | return 1; | |
1941 | #endif | |
1942 | } | |
1943 | ||
1944 | static void | |
1945 | elf_init_stab_section (seg) | |
1946 | segT seg; | |
1947 | { | |
1948 | #ifdef NEED_ECOFF_DEBUG | |
1949 | if (!ECOFF_DEBUGGING) | |
1950 | #endif | |
1951 | obj_elf_init_stab_section (seg); | |
1952 | } | |
1953 | ||
252b5132 RH |
1954 | const struct format_ops elf_format_ops = |
1955 | { | |
1956 | bfd_target_elf_flavour, | |
4c63da97 AM |
1957 | 0, /* dfl_leading_underscore */ |
1958 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
1959 | elf_begin, |
1960 | elf_file_symbol, | |
252b5132 RH |
1961 | elf_frob_symbol, |
1962 | elf_frob_file, | |
1963 | elf_frob_file_after_relocs, | |
1964 | elf_s_get_size, elf_s_set_size, | |
1965 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 1966 | elf_s_get_other, |
5110c57e | 1967 | elf_s_set_other, |
4c63da97 | 1968 | 0, /* s_get_desc */ |
5110c57e HPN |
1969 | 0, /* s_set_desc */ |
1970 | 0, /* s_get_type */ | |
1971 | 0, /* s_set_type */ | |
252b5132 RH |
1972 | elf_copy_symbol_attributes, |
1973 | #ifdef NEED_ECOFF_DEBUG | |
1974 | ecoff_generate_asm_lineno, | |
1975 | ecoff_stab, | |
1976 | #else | |
4c63da97 AM |
1977 | 0, /* generate_asm_lineno */ |
1978 | 0, /* process_stab */ | |
252b5132 | 1979 | #endif |
5110c57e HPN |
1980 | elf_separate_stab_sections, |
1981 | elf_init_stab_section, | |
252b5132 RH |
1982 | elf_sec_sym_ok_for_reloc, |
1983 | elf_pop_insert, | |
1984 | #ifdef NEED_ECOFF_DEBUG | |
1985 | elf_ecoff_set_ext, | |
1986 | #else | |
4c63da97 | 1987 | 0, /* ecoff_set_ext */ |
252b5132 | 1988 | #endif |
4c63da97 | 1989 | elf_obj_read_begin_hook, |
5110c57e | 1990 | elf_obj_symbol_new_hook |
252b5132 | 1991 | }; |