Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF object file format |
8fd3e36b | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
fa306131 | 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 | |
bf514e21 | 20 | 02111-1307, USA. */ |
252b5132 RH |
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 int elf_sec_sym_ok_for_reloc PARAMS ((asection *)); |
59 | static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR)); | |
5110c57e HPN |
60 | static int elf_separate_stab_sections PARAMS ((void)); |
61 | static void elf_init_stab_section PARAMS ((segT)); | |
252b5132 RH |
62 | |
63 | #ifdef NEED_ECOFF_DEBUG | |
64 | static boolean elf_get_extr PARAMS ((asymbol *, EXTR *)); | |
65 | static void elf_set_index PARAMS ((asymbol *, bfd_size_type)); | |
66 | #endif | |
67 | ||
68 | static void obj_elf_line PARAMS ((int)); | |
69 | void obj_elf_version PARAMS ((int)); | |
70 | static void obj_elf_size PARAMS ((int)); | |
71 | static void obj_elf_type PARAMS ((int)); | |
72 | static void obj_elf_ident PARAMS ((int)); | |
73 | static void obj_elf_weak PARAMS ((int)); | |
74 | static void obj_elf_local PARAMS ((int)); | |
2e13b764 | 75 | static void obj_elf_visibility PARAMS ((int)); |
8d28c9d7 AM |
76 | static void obj_elf_change_section PARAMS ((char *, int, int, int, int)); |
77 | static int obj_elf_parse_section_letters PARAMS ((char *, size_t)); | |
78 | static int obj_elf_section_word PARAMS ((char *, size_t)); | |
79 | static int obj_elf_section_type PARAMS ((char *, size_t)); | |
252b5132 | 80 | static void obj_elf_symver PARAMS ((int)); |
252b5132 | 81 | static void obj_elf_subsection PARAMS ((int)); |
9de8d8f1 | 82 | static void obj_elf_popsection PARAMS ((int)); |
252b5132 RH |
83 | |
84 | static const pseudo_typeS elf_pseudo_table[] = | |
85 | { | |
86 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 87 | {"common", obj_elf_common, 1}, |
252b5132 RH |
88 | {"ident", obj_elf_ident, 0}, |
89 | {"local", obj_elf_local, 0}, | |
90 | {"previous", obj_elf_previous, 0}, | |
91 | {"section", obj_elf_section, 0}, | |
92 | {"section.s", obj_elf_section, 0}, | |
93 | {"sect", obj_elf_section, 0}, | |
94 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
95 | {"pushsection", obj_elf_section, 1}, |
96 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
97 | {"size", obj_elf_size, 0}, |
98 | {"type", obj_elf_type, 0}, | |
99 | {"version", obj_elf_version, 0}, | |
100 | {"weak", obj_elf_weak, 0}, | |
101 | ||
bf514e21 | 102 | /* These define symbol visibility. */ |
2e13b764 NC |
103 | {"internal", obj_elf_visibility, STV_INTERNAL}, |
104 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
105 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
106 | ||
252b5132 RH |
107 | /* These are used for stabs-in-elf configurations. */ |
108 | {"line", obj_elf_line, 0}, | |
109 | ||
110 | /* This is a GNU extension to handle symbol versions. */ | |
111 | {"symver", obj_elf_symver, 0}, | |
112 | ||
113 | /* A GNU extension to change subsection only. */ | |
114 | {"subsection", obj_elf_subsection, 0}, | |
115 | ||
116 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
904a31bf AM |
117 | {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0}, |
118 | {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0}, | |
252b5132 | 119 | |
bf514e21 | 120 | /* These are used for dwarf. */ |
252b5132 RH |
121 | {"2byte", cons, 2}, |
122 | {"4byte", cons, 4}, | |
123 | {"8byte", cons, 8}, | |
124 | ||
125 | /* We need to trap the section changing calls to handle .previous. */ | |
126 | {"data", obj_elf_data, 0}, | |
127 | {"text", obj_elf_text, 0}, | |
128 | ||
129 | /* End sentinel. */ | |
ab9da554 | 130 | {NULL, NULL, 0}, |
252b5132 RH |
131 | }; |
132 | ||
133 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
134 | { | |
135 | #ifdef NEED_ECOFF_DEBUG | |
136 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
137 | is used instead. */ | |
138 | { "def", ecoff_directive_def, 0 }, | |
139 | { "dim", ecoff_directive_dim, 0 }, | |
140 | { "endef", ecoff_directive_endef, 0 }, | |
141 | { "file", ecoff_directive_file, 0 }, | |
142 | { "scl", ecoff_directive_scl, 0 }, | |
143 | { "tag", ecoff_directive_tag, 0 }, | |
144 | { "val", ecoff_directive_val, 0 }, | |
145 | ||
146 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
147 | already has meanings for those. We use .esize and .etype | |
148 | instead. These are only generated by gcc anyhow. */ | |
149 | { "esize", ecoff_directive_size, 0 }, | |
150 | { "etype", ecoff_directive_type, 0 }, | |
151 | ||
152 | /* ECOFF specific debugging information. */ | |
153 | { "begin", ecoff_directive_begin, 0 }, | |
154 | { "bend", ecoff_directive_bend, 0 }, | |
155 | { "end", ecoff_directive_end, 0 }, | |
156 | { "ent", ecoff_directive_ent, 0 }, | |
157 | { "fmask", ecoff_directive_fmask, 0 }, | |
158 | { "frame", ecoff_directive_frame, 0 }, | |
159 | { "loc", ecoff_directive_loc, 0 }, | |
160 | { "mask", ecoff_directive_mask, 0 }, | |
161 | ||
162 | /* Other ECOFF directives. */ | |
163 | { "extern", ecoff_directive_extern, 0 }, | |
164 | ||
165 | /* These are used on Irix. I don't know how to implement them. */ | |
166 | { "alias", s_ignore, 0 }, | |
167 | { "bgnb", s_ignore, 0 }, | |
168 | { "endb", s_ignore, 0 }, | |
169 | { "lab", s_ignore, 0 }, | |
170 | { "noalias", s_ignore, 0 }, | |
171 | { "verstamp", s_ignore, 0 }, | |
172 | { "vreg", s_ignore, 0 }, | |
173 | #endif | |
174 | ||
ab9da554 | 175 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
176 | }; |
177 | ||
178 | #undef NO_RELOC | |
179 | #include "aout/aout64.h" | |
180 | ||
181 | /* This is called when the assembler starts. */ | |
182 | ||
183 | void | |
184 | elf_begin () | |
185 | { | |
186 | /* Add symbols for the known sections to the symbol table. */ | |
187 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
188 | TEXT_SECTION_NAME))); | |
189 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
190 | DATA_SECTION_NAME))); | |
191 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
192 | BSS_SECTION_NAME))); | |
193 | } | |
194 | ||
195 | void | |
196 | elf_pop_insert () | |
197 | { | |
198 | pop_insert (elf_pseudo_table); | |
199 | if (ECOFF_DEBUGGING) | |
200 | pop_insert (ecoff_debug_pseudo_table); | |
201 | } | |
202 | ||
203 | static bfd_vma | |
204 | elf_s_get_size (sym) | |
205 | symbolS *sym; | |
206 | { | |
207 | return S_GET_SIZE (sym); | |
208 | } | |
209 | ||
210 | static void | |
211 | elf_s_set_size (sym, sz) | |
212 | symbolS *sym; | |
213 | bfd_vma sz; | |
214 | { | |
215 | S_SET_SIZE (sym, sz); | |
216 | } | |
217 | ||
218 | static bfd_vma | |
219 | elf_s_get_align (sym) | |
220 | symbolS *sym; | |
221 | { | |
222 | return S_GET_ALIGN (sym); | |
223 | } | |
224 | ||
225 | static void | |
226 | elf_s_set_align (sym, align) | |
227 | symbolS *sym; | |
228 | bfd_vma align; | |
229 | { | |
230 | S_SET_ALIGN (sym, align); | |
231 | } | |
232 | ||
4c63da97 AM |
233 | int |
234 | elf_s_get_other (sym) | |
235 | symbolS *sym; | |
236 | { | |
237 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
238 | } | |
239 | ||
5110c57e HPN |
240 | static void |
241 | elf_s_set_other (sym, other) | |
242 | symbolS *sym; | |
243 | int other; | |
244 | { | |
245 | S_SET_OTHER (sym, other); | |
246 | } | |
247 | ||
252b5132 RH |
248 | static int |
249 | elf_sec_sym_ok_for_reloc (sec) | |
250 | asection *sec; | |
251 | { | |
252 | return obj_sec_sym_ok_for_reloc (sec); | |
253 | } | |
254 | ||
255 | void | |
256 | elf_file_symbol (s) | |
5110c57e | 257 | const char *s; |
252b5132 RH |
258 | { |
259 | symbolS *sym; | |
260 | ||
261 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
49309057 ILT |
262 | symbol_set_frag (sym, &zero_address_frag); |
263 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 RH |
264 | |
265 | if (symbol_rootP != sym) | |
266 | { | |
267 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
268 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
269 | #ifdef DEBUG | |
270 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
271 | #endif | |
272 | } | |
273 | ||
274 | #ifdef NEED_ECOFF_DEBUG | |
275 | ecoff_new_file (s); | |
276 | #endif | |
277 | } | |
278 | ||
16b93d88 | 279 | void |
9be1cda6 AS |
280 | obj_elf_common (is_common) |
281 | int is_common; | |
252b5132 RH |
282 | { |
283 | char *name; | |
284 | char c; | |
285 | char *p; | |
286 | int temp, size; | |
287 | symbolS *symbolP; | |
288 | int have_align; | |
289 | ||
9be1cda6 AS |
290 | if (flag_mri && is_common) |
291 | { | |
292 | s_mri_common (0); | |
293 | return; | |
294 | } | |
295 | ||
252b5132 RH |
296 | name = input_line_pointer; |
297 | c = get_symbol_end (); | |
298 | /* just after name is now '\0' */ | |
299 | p = input_line_pointer; | |
300 | *p = c; | |
301 | SKIP_WHITESPACE (); | |
302 | if (*input_line_pointer != ',') | |
303 | { | |
304 | as_bad (_("Expected comma after symbol-name")); | |
305 | ignore_rest_of_line (); | |
306 | return; | |
307 | } | |
308 | input_line_pointer++; /* skip ',' */ | |
309 | if ((temp = get_absolute_expression ()) < 0) | |
310 | { | |
311 | as_bad (_(".COMMon length (%d.) <0! Ignored."), temp); | |
312 | ignore_rest_of_line (); | |
313 | return; | |
314 | } | |
315 | size = temp; | |
316 | *p = 0; | |
317 | symbolP = symbol_find_or_make (name); | |
318 | *p = c; | |
319 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
320 | { | |
321 | as_bad (_("Ignoring attempt to re-define symbol")); | |
322 | ignore_rest_of_line (); | |
323 | return; | |
324 | } | |
325 | if (S_GET_VALUE (symbolP) != 0) | |
326 | { | |
ab9da554 | 327 | if (S_GET_VALUE (symbolP) != (valueT) size) |
252b5132 RH |
328 | { |
329 | as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."), | |
330 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
331 | } | |
332 | } | |
333 | know (symbolP->sy_frag == &zero_address_frag); | |
334 | if (*input_line_pointer != ',') | |
335 | have_align = 0; | |
336 | else | |
337 | { | |
338 | have_align = 1; | |
339 | input_line_pointer++; | |
340 | SKIP_WHITESPACE (); | |
341 | } | |
342 | if (! have_align || *input_line_pointer != '"') | |
343 | { | |
344 | if (! have_align) | |
345 | temp = 0; | |
346 | else | |
347 | { | |
348 | temp = get_absolute_expression (); | |
349 | if (temp < 0) | |
350 | { | |
351 | temp = 0; | |
352 | as_warn (_("Common alignment negative; 0 assumed")); | |
353 | } | |
354 | } | |
49309057 | 355 | if (symbol_get_obj (symbolP)->local) |
252b5132 RH |
356 | { |
357 | segT old_sec; | |
358 | int old_subsec; | |
359 | char *pfrag; | |
360 | int align; | |
361 | ||
362 | /* allocate_bss: */ | |
363 | old_sec = now_seg; | |
364 | old_subsec = now_subseg; | |
365 | if (temp) | |
366 | { | |
367 | /* convert to a power of 2 alignment */ | |
368 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
369 | if (temp != 1) | |
370 | { | |
371 | as_bad (_("Common alignment not a power of 2")); | |
372 | ignore_rest_of_line (); | |
373 | return; | |
374 | } | |
375 | } | |
376 | else | |
377 | align = 0; | |
378 | record_alignment (bss_section, align); | |
379 | subseg_set (bss_section, 0); | |
380 | if (align) | |
381 | frag_align (align, 0, 0); | |
382 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
49309057 ILT |
383 | symbol_get_frag (symbolP)->fr_symbol = 0; |
384 | symbol_set_frag (symbolP, frag_now); | |
252b5132 RH |
385 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
386 | (offsetT) size, (char *) 0); | |
387 | *pfrag = 0; | |
388 | S_SET_SIZE (symbolP, size); | |
389 | S_SET_SEGMENT (symbolP, bss_section); | |
390 | S_CLEAR_EXTERNAL (symbolP); | |
391 | subseg_set (old_sec, old_subsec); | |
392 | } | |
393 | else | |
394 | { | |
395 | allocate_common: | |
396 | S_SET_VALUE (symbolP, (valueT) size); | |
397 | S_SET_ALIGN (symbolP, temp); | |
398 | S_SET_EXTERNAL (symbolP); | |
399 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
400 | } | |
401 | } | |
402 | else | |
403 | { | |
404 | input_line_pointer++; | |
405 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
406 | if (*input_line_pointer == '.') | |
407 | input_line_pointer++; | |
408 | /* @@ Some say data, some say bss. */ | |
409 | if (strncmp (input_line_pointer, "bss\"", 4) | |
410 | && strncmp (input_line_pointer, "data\"", 5)) | |
411 | { | |
412 | while (*--input_line_pointer != '"') | |
413 | ; | |
414 | input_line_pointer--; | |
415 | goto bad_common_segment; | |
416 | } | |
417 | while (*input_line_pointer++ != '"') | |
418 | ; | |
419 | goto allocate_common; | |
420 | } | |
421 | ||
49309057 | 422 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 RH |
423 | |
424 | demand_empty_rest_of_line (); | |
425 | return; | |
426 | ||
427 | { | |
428 | bad_common_segment: | |
429 | p = input_line_pointer; | |
430 | while (*p && *p != '\n') | |
431 | p++; | |
432 | c = *p; | |
433 | *p = '\0'; | |
434 | as_bad (_("bad .common segment %s"), input_line_pointer + 1); | |
435 | *p = c; | |
436 | input_line_pointer = p; | |
437 | ignore_rest_of_line (); | |
438 | return; | |
439 | } | |
440 | } | |
441 | ||
442 | static void | |
443 | obj_elf_local (ignore) | |
ab9da554 | 444 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
445 | { |
446 | char *name; | |
447 | int c; | |
448 | symbolS *symbolP; | |
449 | ||
450 | do | |
451 | { | |
452 | name = input_line_pointer; | |
453 | c = get_symbol_end (); | |
454 | symbolP = symbol_find_or_make (name); | |
455 | *input_line_pointer = c; | |
456 | SKIP_WHITESPACE (); | |
457 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 458 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
459 | if (c == ',') |
460 | { | |
461 | input_line_pointer++; | |
462 | SKIP_WHITESPACE (); | |
463 | if (*input_line_pointer == '\n') | |
464 | c = '\n'; | |
465 | } | |
466 | } | |
467 | while (c == ','); | |
468 | demand_empty_rest_of_line (); | |
469 | } | |
470 | ||
471 | static void | |
472 | obj_elf_weak (ignore) | |
ab9da554 | 473 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
474 | { |
475 | char *name; | |
476 | int c; | |
477 | symbolS *symbolP; | |
478 | ||
479 | do | |
480 | { | |
481 | name = input_line_pointer; | |
482 | c = get_symbol_end (); | |
483 | symbolP = symbol_find_or_make (name); | |
484 | *input_line_pointer = c; | |
485 | SKIP_WHITESPACE (); | |
486 | S_SET_WEAK (symbolP); | |
49309057 | 487 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
488 | if (c == ',') |
489 | { | |
490 | input_line_pointer++; | |
491 | SKIP_WHITESPACE (); | |
492 | if (*input_line_pointer == '\n') | |
493 | c = '\n'; | |
494 | } | |
495 | } | |
496 | while (c == ','); | |
497 | demand_empty_rest_of_line (); | |
498 | } | |
499 | ||
2e13b764 NC |
500 | static void |
501 | obj_elf_visibility (visibility) | |
502 | int visibility; | |
503 | { | |
504 | char *name; | |
505 | int c; | |
506 | symbolS *symbolP; | |
507 | asymbol *bfdsym; | |
508 | elf_symbol_type *elfsym; | |
509 | ||
510 | do | |
511 | { | |
512 | name = input_line_pointer; | |
513 | c = get_symbol_end (); | |
514 | symbolP = symbol_find_or_make (name); | |
515 | *input_line_pointer = c; | |
fa306131 | 516 | |
2e13b764 | 517 | SKIP_WHITESPACE (); |
fa306131 | 518 | |
2e13b764 NC |
519 | bfdsym = symbol_get_bfdsym (symbolP); |
520 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 521 | |
2e13b764 | 522 | assert (elfsym); |
fa306131 | 523 | |
2e13b764 | 524 | elfsym->internal_elf_sym.st_other = visibility; |
fa306131 | 525 | |
2e13b764 NC |
526 | if (c == ',') |
527 | { | |
528 | input_line_pointer ++; | |
fa306131 | 529 | |
2e13b764 | 530 | SKIP_WHITESPACE (); |
fa306131 | 531 | |
2e13b764 NC |
532 | if (*input_line_pointer == '\n') |
533 | c = '\n'; | |
534 | } | |
535 | } | |
536 | while (c == ','); | |
fa306131 | 537 | |
2e13b764 NC |
538 | demand_empty_rest_of_line (); |
539 | } | |
540 | ||
252b5132 RH |
541 | static segT previous_section; |
542 | static int previous_subsection; | |
543 | ||
9de8d8f1 RH |
544 | struct section_stack |
545 | { | |
546 | struct section_stack *next; | |
547 | segT seg, prev_seg; | |
548 | int subseg, prev_subseg; | |
549 | }; | |
550 | ||
551 | static struct section_stack *section_stack; | |
552 | ||
252b5132 RH |
553 | /* Handle the .section pseudo-op. This code supports two different |
554 | syntaxes. | |
555 | ||
556 | The first is found on Solaris, and looks like | |
557 | .section ".sec1",#alloc,#execinstr,#write | |
558 | Here the names after '#' are the SHF_* flags to turn on for the | |
559 | section. I'm not sure how it determines the SHT_* type (BFD | |
560 | doesn't really give us control over the type, anyhow). | |
561 | ||
562 | The second format is found on UnixWare, and probably most SVR4 | |
563 | machines, and looks like | |
564 | .section .sec1,"a",@progbits | |
565 | The quoted string may contain any combination of a, w, x, and | |
566 | represents the SHF_* flags to turn on for the section. The string | |
567 | beginning with '@' can be progbits or nobits. There should be | |
568 | other possibilities, but I don't know what they are. In any case, | |
569 | BFD doesn't really let us set the section type. */ | |
570 | ||
571 | /* Certain named sections have particular defined types, listed on p. | |
572 | 4-19 of the ABI. */ | |
573 | struct special_section | |
574 | { | |
575 | const char *name; | |
576 | int type; | |
577 | int attributes; | |
578 | }; | |
579 | ||
9de8d8f1 | 580 | static struct special_section const special_sections[] = |
252b5132 RH |
581 | { |
582 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
583 | { ".comment", SHT_PROGBITS, 0 }, | |
584 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
585 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
586 | { ".debug", SHT_PROGBITS, 0 }, | |
587 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
588 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
589 | { ".line", SHT_PROGBITS, 0 }, | |
590 | { ".note", SHT_NOTE, 0 }, | |
591 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
592 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
593 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
594 | ||
595 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
596 | ELF_TC_SPECIAL_SECTIONS | |
597 | #endif | |
598 | ||
599 | #if 0 | |
600 | /* The following section names are special, but they can not | |
601 | reasonably appear in assembler code. Some of the attributes are | |
602 | processor dependent. */ | |
603 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
604 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
605 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
606 | { ".got", SHT_PROGBITS, 0 }, | |
607 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
608 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
609 | { ".plt", SHT_PROGBITS, 0 }, | |
610 | { ".shstrtab",SHT_STRTAB, 0 }, | |
611 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
612 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
613 | #endif | |
614 | ||
615 | { NULL, 0, 0 } | |
616 | }; | |
617 | ||
8d28c9d7 | 618 | static void |
f5fa8ca2 | 619 | obj_elf_change_section (name, type, attr, entsize, push) |
9de8d8f1 | 620 | char *name; |
f5fa8ca2 | 621 | int type, attr, entsize, push; |
252b5132 | 622 | { |
742f45cf | 623 | asection *old_sec; |
252b5132 | 624 | segT sec; |
742f45cf AM |
625 | flagword flags; |
626 | int i; | |
252b5132 RH |
627 | |
628 | #ifdef md_flush_pending_output | |
629 | md_flush_pending_output (); | |
630 | #endif | |
631 | ||
9de8d8f1 RH |
632 | /* Switch to the section, creating it if necessary. */ |
633 | if (push) | |
634 | { | |
635 | struct section_stack *elt; | |
636 | elt = xmalloc (sizeof (struct section_stack)); | |
637 | elt->next = section_stack; | |
638 | elt->seg = now_seg; | |
639 | elt->prev_seg = previous_section; | |
640 | elt->subseg = now_subseg; | |
641 | elt->prev_subseg = previous_subsection; | |
642 | section_stack = elt; | |
643 | } | |
644 | previous_section = now_seg; | |
645 | previous_subsection = now_subseg; | |
646 | ||
742f45cf | 647 | old_sec = bfd_get_section_by_name (stdoutput, name); |
9de8d8f1 RH |
648 | sec = subseg_new (name, 0); |
649 | ||
742f45cf AM |
650 | /* See if this is one of the special sections. */ |
651 | for (i = 0; special_sections[i].name != NULL; i++) | |
652 | if (strcmp (name, special_sections[i].name) == 0) | |
653 | { | |
654 | if (type == SHT_NULL) | |
655 | type = special_sections[i].type; | |
656 | else if (type != special_sections[i].type) | |
657 | { | |
658 | if (old_sec == NULL) | |
9de8d8f1 | 659 | { |
742f45cf AM |
660 | as_warn (_("Setting incorrect section type for %s"), name); |
661 | } | |
662 | else | |
663 | { | |
664 | as_warn (_("Ignoring incorrect section type for %s"), name); | |
665 | type = special_sections[i].type; | |
9de8d8f1 | 666 | } |
9de8d8f1 | 667 | } |
742f45cf AM |
668 | if ((attr &~ special_sections[i].attributes) != 0 |
669 | && old_sec == NULL) | |
670 | { | |
671 | /* As a GNU extension, we permit a .note section to be | |
672 | allocatable. If the linker sees an allocateable .note | |
673 | section, it will create a PT_NOTE segment in the output | |
674 | file. */ | |
675 | if (strcmp (name, ".note") != 0 | |
676 | || attr != SHF_ALLOC) | |
677 | as_warn (_("Setting incorrect section attributes for %s"), | |
678 | name); | |
679 | } | |
680 | attr |= special_sections[i].attributes; | |
681 | break; | |
682 | } | |
683 | ||
684 | /* Convert ELF type and flags to BFD flags. */ | |
685 | flags = (SEC_RELOC | |
686 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
687 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
688 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
689 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
690 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
691 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)); | |
9de8d8f1 | 692 | #ifdef md_elf_section_flags |
742f45cf | 693 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
694 | #endif |
695 | ||
742f45cf AM |
696 | if (old_sec == NULL) |
697 | { | |
698 | symbolS *secsym; | |
699 | ||
9de8d8f1 RH |
700 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
701 | if (type == SHT_NOBITS) | |
702 | seg_info (sec)->bss = 1; | |
703 | ||
704 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
705 | if (flags & SEC_MERGE) |
706 | sec->entsize = entsize; | |
9de8d8f1 RH |
707 | |
708 | /* Add a symbol for this section to the symbol table. */ | |
709 | secsym = symbol_find (name); | |
710 | if (secsym != NULL) | |
711 | symbol_set_bfdsym (secsym, sec->symbol); | |
712 | else | |
713 | symbol_table_insert (section_symbol (sec)); | |
714 | } | |
742f45cf AM |
715 | else if (attr != 0) |
716 | { | |
717 | /* If section attributes are specified the second time we see a | |
718 | particular section, then check that they are the same as we | |
719 | saw the first time. */ | |
720 | if ((old_sec->flags ^ flags) | |
721 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
f5fa8ca2 | 722 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS)) |
742f45cf | 723 | as_warn (_("Ignoring changed section attributes for %s"), name); |
f5fa8ca2 JJ |
724 | else if ((flags & SEC_MERGE) && old_sec->entsize != entsize) |
725 | as_warn (_("Ignoring changed section entity size for %s"), name); | |
742f45cf | 726 | } |
9de8d8f1 RH |
727 | |
728 | #ifdef md_elf_section_change_hook | |
742f45cf | 729 | md_elf_section_change_hook (); |
9de8d8f1 RH |
730 | #endif |
731 | } | |
732 | ||
8d28c9d7 | 733 | static int |
9de8d8f1 RH |
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; | |
f5fa8ca2 JJ |
753 | case 'm': |
754 | attr |= SHF_MERGE; | |
755 | break; | |
756 | case 's': | |
757 | attr |= SHF_STRINGS; | |
758 | break; | |
9de8d8f1 RH |
759 | default: |
760 | { | |
f5fa8ca2 | 761 | char *bad_msg = _("Unrecognized .section attribute: want a,m,s,w,x"); |
9de8d8f1 RH |
762 | #ifdef md_elf_section_letter |
763 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
764 | if (md_attr >= 0) | |
765 | attr |= md_attr; | |
766 | else | |
767 | #endif | |
768 | { | |
4c63da97 | 769 | as_warn ("%s", bad_msg); |
9de8d8f1 RH |
770 | attr = -1; |
771 | } | |
772 | } | |
773 | break; | |
774 | } | |
775 | str++, len--; | |
776 | } | |
777 | ||
778 | return attr; | |
779 | } | |
780 | ||
8d28c9d7 | 781 | static int |
9de8d8f1 RH |
782 | obj_elf_section_word (str, len) |
783 | char *str; | |
784 | size_t len; | |
785 | { | |
786 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
787 | return SHF_WRITE; | |
788 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
789 | return SHF_ALLOC; | |
790 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
791 | return SHF_EXECINSTR; | |
792 | ||
793 | #ifdef md_elf_section_word | |
794 | { | |
795 | int md_attr = md_elf_section_word (str, len); | |
796 | if (md_attr >= 0) | |
797 | return md_attr; | |
798 | } | |
799 | #endif | |
800 | ||
801 | as_warn (_("Unrecognized section attribute")); | |
802 | return 0; | |
803 | } | |
804 | ||
8d28c9d7 | 805 | static int |
9de8d8f1 RH |
806 | obj_elf_section_type (str, len) |
807 | char *str; | |
808 | size_t len; | |
809 | { | |
810 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
811 | return SHT_PROGBITS; | |
812 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
813 | return SHT_NOBITS; | |
814 | ||
815 | #ifdef md_elf_section_type | |
816 | { | |
817 | int md_type = md_elf_section_type (str, len); | |
818 | if (md_type >= 0) | |
819 | return md_type; | |
820 | } | |
821 | #endif | |
822 | ||
823 | as_warn (_("Unrecognized section type")); | |
824 | return 0; | |
825 | } | |
826 | ||
827 | void | |
828 | obj_elf_section (push) | |
829 | int push; | |
830 | { | |
831 | char *name, *beg, *end; | |
832 | int type, attr, dummy; | |
f5fa8ca2 | 833 | int entsize; |
9de8d8f1 | 834 | |
5b93d8bb | 835 | #ifndef TC_I370 |
252b5132 RH |
836 | if (flag_mri) |
837 | { | |
838 | char mri_type; | |
839 | ||
9de8d8f1 | 840 | #ifdef md_flush_pending_output |
60bcf0fa | 841 | md_flush_pending_output (); |
9de8d8f1 RH |
842 | #endif |
843 | ||
252b5132 RH |
844 | previous_section = now_seg; |
845 | previous_subsection = now_subseg; | |
846 | ||
847 | s_mri_sect (&mri_type); | |
848 | ||
849 | #ifdef md_elf_section_change_hook | |
850 | md_elf_section_change_hook (); | |
851 | #endif | |
852 | ||
853 | return; | |
854 | } | |
5b93d8bb | 855 | #endif /* ! defined (TC_I370) */ |
252b5132 RH |
856 | |
857 | /* Get name of section. */ | |
858 | SKIP_WHITESPACE (); | |
859 | if (*input_line_pointer == '"') | |
860 | { | |
9de8d8f1 RH |
861 | name = demand_copy_C_string (&dummy); |
862 | if (name == NULL) | |
252b5132 RH |
863 | { |
864 | ignore_rest_of_line (); | |
865 | return; | |
866 | } | |
867 | } | |
868 | else | |
869 | { | |
9de8d8f1 RH |
870 | end = input_line_pointer; |
871 | while (0 == strchr ("\n\t,; ", *end)) | |
872 | end++; | |
873 | if (end == input_line_pointer) | |
252b5132 RH |
874 | { |
875 | as_warn (_("Missing section name")); | |
876 | ignore_rest_of_line (); | |
877 | return; | |
878 | } | |
fa306131 | 879 | |
9de8d8f1 RH |
880 | name = xmalloc (end - input_line_pointer + 1); |
881 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
882 | name[end - input_line_pointer] = '\0'; | |
883 | input_line_pointer = end; | |
252b5132 | 884 | } |
252b5132 RH |
885 | SKIP_WHITESPACE (); |
886 | ||
887 | type = SHT_NULL; | |
888 | attr = 0; | |
f5fa8ca2 | 889 | entsize = 0; |
252b5132 RH |
890 | |
891 | if (*input_line_pointer == ',') | |
892 | { | |
893 | /* Skip the comma. */ | |
894 | ++input_line_pointer; | |
252b5132 RH |
895 | SKIP_WHITESPACE (); |
896 | ||
897 | if (*input_line_pointer == '"') | |
898 | { | |
9de8d8f1 RH |
899 | beg = demand_copy_C_string (&dummy); |
900 | if (beg == NULL) | |
252b5132 | 901 | { |
9de8d8f1 RH |
902 | ignore_rest_of_line (); |
903 | return; | |
252b5132 | 904 | } |
9de8d8f1 | 905 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
906 | |
907 | SKIP_WHITESPACE (); | |
908 | if (*input_line_pointer == ',') | |
909 | { | |
9de8d8f1 | 910 | char c; |
252b5132 RH |
911 | ++input_line_pointer; |
912 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
913 | c = *input_line_pointer; |
914 | if (c == '"') | |
252b5132 | 915 | { |
9de8d8f1 RH |
916 | beg = demand_copy_C_string (&dummy); |
917 | if (beg == NULL) | |
252b5132 | 918 | { |
9de8d8f1 RH |
919 | ignore_rest_of_line (); |
920 | return; | |
252b5132 | 921 | } |
9de8d8f1 | 922 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
923 | } |
924 | else if (c == '@' || c == '%') | |
925 | { | |
926 | beg = ++input_line_pointer; | |
927 | c = get_symbol_end (); | |
928 | *input_line_pointer = c; | |
929 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 RH |
930 | } |
931 | } | |
f5fa8ca2 JJ |
932 | |
933 | SKIP_WHITESPACE (); | |
934 | if ((attr & SHF_MERGE) && *input_line_pointer == ',') | |
935 | { | |
936 | ++input_line_pointer; | |
937 | SKIP_WHITESPACE (); | |
938 | entsize = get_absolute_expression (); | |
939 | if (entsize < 0) | |
940 | { | |
941 | as_warn (_("Bad .section directive - invalid merge entity size")); | |
942 | attr &= ~SHF_MERGE; | |
943 | entsize = 0; | |
944 | } | |
945 | } | |
252b5132 RH |
946 | } |
947 | else | |
948 | { | |
949 | do | |
950 | { | |
9de8d8f1 RH |
951 | char c; |
952 | ||
252b5132 RH |
953 | SKIP_WHITESPACE (); |
954 | if (*input_line_pointer != '#') | |
955 | { | |
956 | as_warn (_("Bad .section directive - character following name is not '#'")); | |
957 | ignore_rest_of_line (); | |
958 | return; | |
959 | } | |
9de8d8f1 RH |
960 | beg = ++input_line_pointer; |
961 | c = get_symbol_end (); | |
962 | *input_line_pointer = c; | |
963 | ||
964 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
965 | ||
252b5132 RH |
966 | SKIP_WHITESPACE (); |
967 | } | |
968 | while (*input_line_pointer++ == ','); | |
969 | --input_line_pointer; | |
970 | } | |
971 | } | |
972 | ||
252b5132 | 973 | demand_empty_rest_of_line (); |
9de8d8f1 | 974 | |
f5fa8ca2 JJ |
975 | if ((attr & SHF_MERGE) && entsize == 0) |
976 | { | |
977 | as_warn (_("Entity size for SHF_MERGE not specified.\nSpecify entity size as 4th argument")); | |
978 | attr &= SHF_MERGE; | |
979 | } | |
980 | ||
981 | obj_elf_change_section (name, type, attr, entsize, push); | |
252b5132 RH |
982 | } |
983 | ||
984 | /* Change to the .data section. */ | |
985 | ||
16b93d88 | 986 | void |
252b5132 RH |
987 | obj_elf_data (i) |
988 | int i; | |
989 | { | |
990 | #ifdef md_flush_pending_output | |
991 | md_flush_pending_output (); | |
992 | #endif | |
993 | ||
994 | previous_section = now_seg; | |
995 | previous_subsection = now_subseg; | |
996 | s_data (i); | |
997 | ||
998 | #ifdef md_elf_section_change_hook | |
999 | md_elf_section_change_hook (); | |
1000 | #endif | |
1001 | } | |
1002 | ||
1003 | /* Change to the .text section. */ | |
1004 | ||
16b93d88 | 1005 | void |
252b5132 RH |
1006 | obj_elf_text (i) |
1007 | int i; | |
1008 | { | |
1009 | #ifdef md_flush_pending_output | |
1010 | md_flush_pending_output (); | |
1011 | #endif | |
1012 | ||
1013 | previous_section = now_seg; | |
1014 | previous_subsection = now_subseg; | |
1015 | s_text (i); | |
1016 | ||
1017 | #ifdef md_elf_section_change_hook | |
1018 | md_elf_section_change_hook (); | |
1019 | #endif | |
1020 | } | |
1021 | ||
1022 | static void | |
1023 | obj_elf_subsection (ignore) | |
ab9da554 | 1024 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1025 | { |
1026 | register int temp; | |
1027 | ||
1028 | #ifdef md_flush_pending_output | |
1029 | md_flush_pending_output (); | |
1030 | #endif | |
1031 | ||
1032 | previous_section = now_seg; | |
1033 | previous_subsection = now_subseg; | |
1034 | ||
1035 | temp = get_absolute_expression (); | |
1036 | subseg_set (now_seg, (subsegT) temp); | |
1037 | demand_empty_rest_of_line (); | |
1038 | ||
1039 | #ifdef md_elf_section_change_hook | |
1040 | md_elf_section_change_hook (); | |
1041 | #endif | |
1042 | } | |
1043 | ||
1044 | /* This can be called from the processor backends if they change | |
1045 | sections. */ | |
1046 | ||
1047 | void | |
1048 | obj_elf_section_change_hook () | |
1049 | { | |
1050 | previous_section = now_seg; | |
1051 | previous_subsection = now_subseg; | |
1052 | } | |
1053 | ||
1054 | void | |
1055 | obj_elf_previous (ignore) | |
ab9da554 | 1056 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1057 | { |
9de8d8f1 RH |
1058 | segT new_section; |
1059 | int new_subsection; | |
1060 | ||
252b5132 RH |
1061 | if (previous_section == 0) |
1062 | { | |
1063 | as_bad (_(".previous without corresponding .section; ignored")); | |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | #ifdef md_flush_pending_output | |
1068 | md_flush_pending_output (); | |
1069 | #endif | |
1070 | ||
9de8d8f1 RH |
1071 | new_section = previous_section; |
1072 | new_subsection = previous_subsection; | |
1073 | previous_section = now_seg; | |
1074 | previous_subsection = now_subseg; | |
1075 | subseg_set (new_section, new_subsection); | |
1076 | ||
1077 | #ifdef md_elf_section_change_hook | |
1078 | md_elf_section_change_hook (); | |
1079 | #endif | |
1080 | } | |
1081 | ||
1082 | static void | |
1083 | obj_elf_popsection (xxx) | |
ab9da554 | 1084 | int xxx ATTRIBUTE_UNUSED; |
9de8d8f1 RH |
1085 | { |
1086 | struct section_stack *top = section_stack; | |
1087 | ||
1088 | if (top == NULL) | |
1089 | { | |
1090 | as_bad (_(".popsection without corresponding .pushsection; ignored")); | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | #ifdef md_flush_pending_output | |
1095 | md_flush_pending_output (); | |
1096 | #endif | |
1097 | ||
1098 | section_stack = top->next; | |
1099 | previous_section = top->prev_seg; | |
1100 | previous_subsection = top->prev_subseg; | |
1101 | subseg_set (top->seg, top->subseg); | |
1102 | free (top); | |
252b5132 RH |
1103 | |
1104 | #ifdef md_elf_section_change_hook | |
1105 | md_elf_section_change_hook (); | |
1106 | #endif | |
1107 | } | |
1108 | ||
1109 | static void | |
1110 | obj_elf_line (ignore) | |
ab9da554 | 1111 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1112 | { |
1113 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1114 | delightful bug, so we are not being incompatible here. */ |
252b5132 RH |
1115 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); |
1116 | demand_empty_rest_of_line (); | |
1117 | } | |
1118 | ||
1119 | /* This handles the .symver pseudo-op, which is used to specify a | |
1120 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1121 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1122 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1123 | with the same value as the symbol NAME. */ | |
1124 | ||
1125 | static void | |
1126 | obj_elf_symver (ignore) | |
ab9da554 | 1127 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1128 | { |
1129 | char *name; | |
1130 | char c; | |
468cced8 | 1131 | char old_lexat; |
252b5132 RH |
1132 | symbolS *sym; |
1133 | ||
1134 | name = input_line_pointer; | |
1135 | c = get_symbol_end (); | |
1136 | ||
1137 | sym = symbol_find_or_make (name); | |
1138 | ||
1139 | *input_line_pointer = c; | |
1140 | ||
252b5132 RH |
1141 | SKIP_WHITESPACE (); |
1142 | if (*input_line_pointer != ',') | |
1143 | { | |
1144 | as_bad (_("expected comma after name in .symver")); | |
1145 | ignore_rest_of_line (); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | ++input_line_pointer; | |
1150 | name = input_line_pointer; | |
468cced8 AM |
1151 | |
1152 | /* Temporarily include '@' in symbol names. */ | |
1153 | old_lexat = lex_type[(unsigned char) '@']; | |
1154 | lex_type[(unsigned char) '@'] |= LEX_NAME; | |
1155 | c = get_symbol_end (); | |
1156 | lex_type[(unsigned char) '@'] = old_lexat; | |
252b5132 | 1157 | |
339681c0 L |
1158 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1159 | { | |
1160 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1161 | |
339681c0 | 1162 | *input_line_pointer = c; |
252b5132 | 1163 | |
6f620856 L |
1164 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1165 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1166 | { |
1167 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1168 | symbol_get_obj (sym)->versioned_name, | |
1169 | S_GET_NAME (sym)); | |
1170 | ignore_rest_of_line (); | |
1171 | return; | |
1172 | } | |
1173 | } | |
1174 | else | |
252b5132 | 1175 | { |
339681c0 L |
1176 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1177 | { | |
1178 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1179 | name, symbol_get_obj (sym)->versioned_name, | |
1180 | S_GET_NAME (sym)); | |
1181 | ignore_rest_of_line (); | |
1182 | return; | |
1183 | } | |
1184 | ||
1185 | *input_line_pointer = c; | |
252b5132 RH |
1186 | } |
1187 | ||
1188 | demand_empty_rest_of_line (); | |
1189 | } | |
1190 | ||
1191 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1192 | to the linker the hierarchy in which a particular table resides. The | |
1193 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1194 | ||
904a31bf | 1195 | struct fix * |
252b5132 | 1196 | obj_elf_vtable_inherit (ignore) |
ab9da554 | 1197 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1198 | { |
1199 | char *cname, *pname; | |
1200 | symbolS *csym, *psym; | |
1201 | char c, bad = 0; | |
1202 | ||
1203 | if (*input_line_pointer == '#') | |
1204 | ++input_line_pointer; | |
1205 | ||
1206 | cname = input_line_pointer; | |
1207 | c = get_symbol_end (); | |
1208 | csym = symbol_find (cname); | |
1209 | ||
1210 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1211 | the same child symbol. Also, we can currently only do this if the | |
1212 | child symbol is already exists and is placed in a fragment. */ | |
1213 | ||
49309057 | 1214 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 RH |
1215 | { |
1216 | as_bad ("expected `%s' to have already been set for .vtable_inherit", | |
1217 | cname); | |
1218 | bad = 1; | |
1219 | } | |
1220 | ||
1221 | *input_line_pointer = c; | |
1222 | ||
1223 | SKIP_WHITESPACE (); | |
1224 | if (*input_line_pointer != ',') | |
1225 | { | |
1226 | as_bad ("expected comma after name in .vtable_inherit"); | |
1227 | ignore_rest_of_line (); | |
904a31bf | 1228 | return NULL; |
252b5132 RH |
1229 | } |
1230 | ||
1231 | ++input_line_pointer; | |
1232 | SKIP_WHITESPACE (); | |
1233 | ||
1234 | if (*input_line_pointer == '#') | |
1235 | ++input_line_pointer; | |
1236 | ||
1237 | if (input_line_pointer[0] == '0' | |
1238 | && (input_line_pointer[1] == '\0' | |
d9a62219 | 1239 | || isspace ((unsigned char) input_line_pointer[1]))) |
252b5132 RH |
1240 | { |
1241 | psym = section_symbol (absolute_section); | |
1242 | ++input_line_pointer; | |
1243 | } | |
1244 | else | |
1245 | { | |
1246 | pname = input_line_pointer; | |
1247 | c = get_symbol_end (); | |
1248 | psym = symbol_find_or_make (pname); | |
1249 | *input_line_pointer = c; | |
1250 | } | |
1251 | ||
1252 | demand_empty_rest_of_line (); | |
1253 | ||
1254 | if (bad) | |
904a31bf | 1255 | return NULL; |
252b5132 | 1256 | |
49309057 | 1257 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1258 | return fix_new (symbol_get_frag (csym), |
1259 | symbol_get_value_expression (csym)->X_add_number, | |
1260 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1261 | } |
fa306131 | 1262 | |
252b5132 RH |
1263 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1264 | to the linker that a vtable slot was used. The syntax is | |
1265 | ".vtable_entry tablename, offset". */ | |
1266 | ||
904a31bf | 1267 | struct fix * |
252b5132 | 1268 | obj_elf_vtable_entry (ignore) |
ab9da554 | 1269 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1270 | { |
1271 | char *name; | |
1272 | symbolS *sym; | |
1273 | offsetT offset; | |
1274 | char c; | |
1275 | ||
1276 | if (*input_line_pointer == '#') | |
1277 | ++input_line_pointer; | |
1278 | ||
1279 | name = input_line_pointer; | |
1280 | c = get_symbol_end (); | |
1281 | sym = symbol_find_or_make (name); | |
1282 | *input_line_pointer = c; | |
1283 | ||
1284 | SKIP_WHITESPACE (); | |
1285 | if (*input_line_pointer != ',') | |
1286 | { | |
1287 | as_bad ("expected comma after name in .vtable_entry"); | |
1288 | ignore_rest_of_line (); | |
904a31bf | 1289 | return NULL; |
252b5132 RH |
1290 | } |
1291 | ||
1292 | ++input_line_pointer; | |
1293 | if (*input_line_pointer == '#') | |
1294 | ++input_line_pointer; | |
1295 | ||
1296 | offset = get_absolute_expression (); | |
1297 | ||
252b5132 | 1298 | demand_empty_rest_of_line (); |
904a31bf AM |
1299 | |
1300 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1301 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1302 | } |
1303 | ||
1304 | void | |
4c63da97 | 1305 | elf_obj_read_begin_hook () |
252b5132 RH |
1306 | { |
1307 | #ifdef NEED_ECOFF_DEBUG | |
1308 | if (ECOFF_DEBUGGING) | |
1309 | ecoff_read_begin_hook (); | |
1310 | #endif | |
1311 | } | |
1312 | ||
1313 | void | |
4c63da97 | 1314 | elf_obj_symbol_new_hook (symbolP) |
252b5132 RH |
1315 | symbolS *symbolP; |
1316 | { | |
49309057 ILT |
1317 | struct elf_obj_sy *sy_obj; |
1318 | ||
1319 | sy_obj = symbol_get_obj (symbolP); | |
1320 | sy_obj->size = NULL; | |
1321 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1322 | |
1323 | #ifdef NEED_ECOFF_DEBUG | |
1324 | if (ECOFF_DEBUGGING) | |
1325 | ecoff_symbol_new_hook (symbolP); | |
1326 | #endif | |
1327 | } | |
1328 | ||
8fd3e36b AM |
1329 | /* When setting one symbol equal to another, by default we probably |
1330 | want them to have the same "size", whatever it means in the current | |
1331 | context. */ | |
1332 | ||
1333 | void | |
1334 | elf_copy_symbol_attributes (dest, src) | |
1335 | symbolS *dest, *src; | |
1336 | { | |
1337 | struct elf_obj_sy *srcelf = symbol_get_obj (src); | |
1338 | struct elf_obj_sy *destelf = symbol_get_obj (dest); | |
1339 | if (srcelf->size) | |
1340 | { | |
1341 | if (destelf->size == NULL) | |
1342 | destelf->size = | |
1343 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1344 | *destelf->size = *srcelf->size; | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | if (destelf->size != NULL) | |
1349 | free (destelf->size); | |
1350 | destelf->size = NULL; | |
1351 | } | |
1352 | S_SET_SIZE (dest, S_GET_SIZE (src)); | |
1353 | S_SET_OTHER (dest, S_GET_OTHER (src)); | |
1354 | } | |
1355 | ||
252b5132 RH |
1356 | void |
1357 | obj_elf_version (ignore) | |
ab9da554 | 1358 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1359 | { |
1360 | char *name; | |
1361 | unsigned int c; | |
1362 | char ch; | |
1363 | char *p; | |
1364 | asection *seg = now_seg; | |
1365 | subsegT subseg = now_subseg; | |
1366 | Elf_Internal_Note i_note; | |
1367 | Elf_External_Note e_note; | |
1368 | asection *note_secp = (asection *) NULL; | |
1369 | int i, len; | |
1370 | ||
1371 | SKIP_WHITESPACE (); | |
1372 | if (*input_line_pointer == '\"') | |
1373 | { | |
bf514e21 | 1374 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1375 | name = input_line_pointer; |
1376 | ||
1377 | while (is_a_char (c = next_char_of_string ())) | |
1378 | ; | |
1379 | c = *input_line_pointer; | |
1380 | *input_line_pointer = '\0'; | |
1381 | *(input_line_pointer - 1) = '\0'; | |
1382 | *input_line_pointer = c; | |
1383 | ||
1384 | /* create the .note section */ | |
1385 | ||
1386 | note_secp = subseg_new (".note", 0); | |
1387 | bfd_set_section_flags (stdoutput, | |
1388 | note_secp, | |
1389 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1390 | ||
1391 | /* process the version string */ | |
1392 | ||
1393 | len = strlen (name); | |
1394 | ||
1395 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ | |
1396 | i_note.descsz = 0; /* no description */ | |
1397 | i_note.type = NT_VERSION; | |
1398 | p = frag_more (sizeof (e_note.namesz)); | |
1399 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1400 | p = frag_more (sizeof (e_note.descsz)); | |
1401 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1402 | p = frag_more (sizeof (e_note.type)); | |
1403 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1404 | ||
1405 | for (i = 0; i < len; i++) | |
1406 | { | |
1407 | ch = *(name + i); | |
1408 | { | |
1409 | FRAG_APPEND_1_CHAR (ch); | |
1410 | } | |
1411 | } | |
1412 | frag_align (2, 0, 0); | |
1413 | ||
1414 | subseg_set (seg, subseg); | |
1415 | } | |
1416 | else | |
1417 | { | |
1418 | as_bad (_("Expected quoted string")); | |
1419 | } | |
1420 | demand_empty_rest_of_line (); | |
1421 | } | |
1422 | ||
1423 | static void | |
1424 | obj_elf_size (ignore) | |
ab9da554 | 1425 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1426 | { |
1427 | char *name = input_line_pointer; | |
1428 | char c = get_symbol_end (); | |
1429 | char *p; | |
1430 | expressionS exp; | |
1431 | symbolS *sym; | |
1432 | ||
1433 | p = input_line_pointer; | |
1434 | *p = c; | |
1435 | SKIP_WHITESPACE (); | |
1436 | if (*input_line_pointer != ',') | |
1437 | { | |
1438 | *p = 0; | |
1439 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1440 | *p = c; | |
1441 | ignore_rest_of_line (); | |
1442 | return; | |
1443 | } | |
1444 | input_line_pointer++; | |
1445 | expression (&exp); | |
1446 | if (exp.X_op == O_absent) | |
1447 | { | |
1448 | as_bad (_("missing expression in .size directive")); | |
1449 | exp.X_op = O_constant; | |
1450 | exp.X_add_number = 0; | |
1451 | } | |
1452 | *p = 0; | |
1453 | sym = symbol_find_or_make (name); | |
1454 | *p = c; | |
1455 | if (exp.X_op == O_constant) | |
c538998c JJ |
1456 | { |
1457 | S_SET_SIZE (sym, exp.X_add_number); | |
1458 | if (symbol_get_obj (sym)->size) | |
1459 | { | |
1460 | xfree (symbol_get_obj (sym)->size); | |
1461 | symbol_get_obj (sym)->size = NULL; | |
1462 | } | |
1463 | } | |
252b5132 RH |
1464 | else |
1465 | { | |
49309057 ILT |
1466 | symbol_get_obj (sym)->size = |
1467 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1468 | *symbol_get_obj (sym)->size = exp; | |
252b5132 RH |
1469 | } |
1470 | demand_empty_rest_of_line (); | |
1471 | } | |
1472 | ||
1473 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1474 | There are five syntaxes: |
fa306131 | 1475 | |
252b5132 RH |
1476 | The first (used on Solaris) is |
1477 | .type SYM,#function | |
1478 | The second (used on UnixWare) is | |
1479 | .type SYM,@function | |
1480 | The third (reportedly to be used on Irix 6.0) is | |
1481 | .type SYM STT_FUNC | |
1482 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1483 | .type SYM,%function | |
aa8c34c3 JE |
1484 | The fifth (used on SVR4/860) is |
1485 | .type SYM,"function" | |
252b5132 RH |
1486 | */ |
1487 | ||
1488 | static void | |
1489 | obj_elf_type (ignore) | |
ab9da554 | 1490 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1491 | { |
1492 | char *name; | |
1493 | char c; | |
1494 | int type; | |
1495 | const char *typename; | |
1496 | symbolS *sym; | |
904a31bf | 1497 | elf_symbol_type *elfsym; |
252b5132 RH |
1498 | |
1499 | name = input_line_pointer; | |
1500 | c = get_symbol_end (); | |
1501 | sym = symbol_find_or_make (name); | |
904a31bf | 1502 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1503 | *input_line_pointer = c; |
1504 | ||
1505 | SKIP_WHITESPACE (); | |
1506 | if (*input_line_pointer == ',') | |
1507 | ++input_line_pointer; | |
1508 | ||
1509 | SKIP_WHITESPACE (); | |
1510 | if ( *input_line_pointer == '#' | |
1511 | || *input_line_pointer == '@' | |
aa8c34c3 | 1512 | || *input_line_pointer == '"' |
252b5132 RH |
1513 | || *input_line_pointer == '%') |
1514 | ++input_line_pointer; | |
1515 | ||
1516 | typename = input_line_pointer; | |
1517 | c = get_symbol_end (); | |
1518 | ||
1519 | type = 0; | |
1520 | if (strcmp (typename, "function") == 0 | |
1521 | || strcmp (typename, "STT_FUNC") == 0) | |
1522 | type = BSF_FUNCTION; | |
1523 | else if (strcmp (typename, "object") == 0 | |
1524 | || strcmp (typename, "STT_OBJECT") == 0) | |
1525 | type = BSF_OBJECT; | |
904a31bf AM |
1526 | #ifdef md_elf_symbol_type |
1527 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1528 | ; | |
1529 | #endif | |
252b5132 RH |
1530 | else |
1531 | as_bad (_("ignoring unrecognized symbol type \"%s\""), typename); | |
1532 | ||
1533 | *input_line_pointer = c; | |
1534 | ||
aa8c34c3 JE |
1535 | if (*input_line_pointer == '"') |
1536 | ++input_line_pointer; | |
1537 | ||
904a31bf | 1538 | elfsym->symbol.flags |= type; |
252b5132 RH |
1539 | |
1540 | demand_empty_rest_of_line (); | |
1541 | } | |
1542 | ||
1543 | static void | |
1544 | obj_elf_ident (ignore) | |
ab9da554 | 1545 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1546 | { |
1547 | static segT comment_section; | |
1548 | segT old_section = now_seg; | |
1549 | int old_subsection = now_subseg; | |
1550 | ||
5f91fe03 ILT |
1551 | #ifdef md_flush_pending_output |
1552 | md_flush_pending_output (); | |
1553 | #endif | |
1554 | ||
252b5132 RH |
1555 | if (!comment_section) |
1556 | { | |
1557 | char *p; | |
1558 | comment_section = subseg_new (".comment", 0); | |
1559 | bfd_set_section_flags (stdoutput, comment_section, | |
1560 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1561 | p = frag_more (1); | |
1562 | *p = 0; | |
1563 | } | |
1564 | else | |
1565 | subseg_set (comment_section, 0); | |
1566 | stringer (1); | |
1567 | subseg_set (old_section, old_subsection); | |
1568 | } | |
1569 | ||
1570 | #ifdef INIT_STAB_SECTION | |
1571 | ||
1572 | /* The first entry in a .stabs section is special. */ | |
1573 | ||
1574 | void | |
1575 | obj_elf_init_stab_section (seg) | |
1576 | segT seg; | |
1577 | { | |
1578 | char *file; | |
1579 | char *p; | |
1580 | char *stabstr_name; | |
1581 | unsigned int stroff; | |
1582 | ||
1583 | /* Force the section to align to a longword boundary. Without this, | |
1584 | UnixWare ar crashes. */ | |
1585 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1586 | ||
bf514e21 | 1587 | /* Make space for this first symbol. */ |
252b5132 | 1588 | p = frag_more (12); |
bf514e21 | 1589 | /* Zero it out. */ |
252b5132 RH |
1590 | memset (p, 0, 12); |
1591 | as_where (&file, (unsigned int *) NULL); | |
1592 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); | |
1593 | strcpy (stabstr_name, segment_name (seg)); | |
1594 | strcat (stabstr_name, "str"); | |
1595 | stroff = get_stab_string_offset (file, stabstr_name); | |
1596 | know (stroff == 1); | |
1597 | md_number_to_chars (p, stroff, 4); | |
1598 | seg_info (seg)->stabu.p = p; | |
1599 | } | |
1600 | ||
1601 | #endif | |
1602 | ||
1603 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1604 | ||
1605 | static void | |
1606 | adjust_stab_sections (abfd, sec, xxx) | |
1607 | bfd *abfd; | |
1608 | asection *sec; | |
ab9da554 | 1609 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1610 | { |
1611 | char *name; | |
1612 | asection *strsec; | |
1613 | char *p; | |
1614 | int strsz, nsyms; | |
1615 | ||
1616 | if (strncmp (".stab", sec->name, 5)) | |
1617 | return; | |
1618 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1619 | return; | |
1620 | ||
1621 | name = (char *) alloca (strlen (sec->name) + 4); | |
1622 | strcpy (name, sec->name); | |
1623 | strcat (name, "str"); | |
1624 | strsec = bfd_get_section_by_name (abfd, name); | |
1625 | if (strsec) | |
1626 | strsz = bfd_section_size (abfd, strsec); | |
1627 | else | |
1628 | strsz = 0; | |
1629 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1630 | ||
1631 | p = seg_info (sec)->stabu.p; | |
1632 | assert (p != 0); | |
1633 | ||
1634 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); | |
1635 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
1636 | } | |
1637 | ||
1638 | #ifdef NEED_ECOFF_DEBUG | |
1639 | ||
1640 | /* This function is called by the ECOFF code. It is supposed to | |
1641 | record the external symbol information so that the backend can | |
1642 | write it out correctly. The ELF backend doesn't actually handle | |
1643 | this at the moment, so we do it ourselves. We save the information | |
1644 | in the symbol. */ | |
1645 | ||
1646 | void | |
1647 | elf_ecoff_set_ext (sym, ext) | |
1648 | symbolS *sym; | |
1649 | struct ecoff_extr *ext; | |
1650 | { | |
49309057 | 1651 | symbol_get_bfdsym (sym)->udata.p = (PTR) ext; |
252b5132 RH |
1652 | } |
1653 | ||
1654 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1655 | supposed to *EXT to the external symbol information, and return | |
1656 | whether the symbol should be used at all. */ | |
1657 | ||
1658 | static boolean | |
1659 | elf_get_extr (sym, ext) | |
1660 | asymbol *sym; | |
1661 | EXTR *ext; | |
1662 | { | |
1663 | if (sym->udata.p == NULL) | |
1664 | return false; | |
1665 | *ext = *(EXTR *) sym->udata.p; | |
1666 | return true; | |
1667 | } | |
1668 | ||
1669 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1670 | nothing to do for ELF. */ | |
1671 | ||
1672 | /*ARGSUSED*/ | |
1673 | static void | |
1674 | elf_set_index (sym, indx) | |
5f91fe03 ILT |
1675 | asymbol *sym ATTRIBUTE_UNUSED; |
1676 | bfd_size_type indx ATTRIBUTE_UNUSED; | |
252b5132 RH |
1677 | { |
1678 | } | |
1679 | ||
1680 | #endif /* NEED_ECOFF_DEBUG */ | |
1681 | ||
1682 | void | |
1683 | elf_frob_symbol (symp, puntp) | |
1684 | symbolS *symp; | |
1685 | int *puntp; | |
1686 | { | |
49309057 ILT |
1687 | struct elf_obj_sy *sy_obj; |
1688 | ||
252b5132 RH |
1689 | #ifdef NEED_ECOFF_DEBUG |
1690 | if (ECOFF_DEBUGGING) | |
1691 | ecoff_frob_symbol (symp); | |
1692 | #endif | |
1693 | ||
49309057 ILT |
1694 | sy_obj = symbol_get_obj (symp); |
1695 | ||
1696 | if (sy_obj->size != NULL) | |
252b5132 | 1697 | { |
49309057 | 1698 | switch (sy_obj->size->X_op) |
252b5132 RH |
1699 | { |
1700 | case O_subtract: | |
1701 | S_SET_SIZE (symp, | |
49309057 ILT |
1702 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1703 | + sy_obj->size->X_add_number | |
1704 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1705 | break; |
1706 | case O_constant: | |
1707 | S_SET_SIZE (symp, | |
49309057 ILT |
1708 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1709 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1710 | break; |
1711 | default: | |
1712 | as_bad (_(".size expression too complicated to fix up")); | |
1713 | break; | |
1714 | } | |
49309057 ILT |
1715 | free (sy_obj->size); |
1716 | sy_obj->size = NULL; | |
252b5132 RH |
1717 | } |
1718 | ||
49309057 | 1719 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1720 | { |
79082ff0 L |
1721 | char *p; |
1722 | ||
1723 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1724 | know (p != NULL); | |
1725 | ||
252b5132 RH |
1726 | /* This symbol was given a new name with the .symver directive. |
1727 | ||
1728 | If this is an external reference, just rename the symbol to | |
1729 | include the version string. This will make the relocs be | |
1730 | against the correct versioned symbol. | |
1731 | ||
1732 | If this is a definition, add an alias. FIXME: Using an alias | |
1733 | will permit the debugging information to refer to the right | |
1734 | symbol. However, it's not clear whether it is the best | |
1735 | approach. */ | |
1736 | ||
1737 | if (! S_IS_DEFINED (symp)) | |
1738 | { | |
252b5132 RH |
1739 | /* Verify that the name isn't using the @@ syntax--this is |
1740 | reserved for definitions of the default version to link | |
1741 | against. */ | |
252b5132 RH |
1742 | if (p[1] == ELF_VER_CHR) |
1743 | { | |
1744 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1745 | sy_obj->versioned_name); |
252b5132 RH |
1746 | *puntp = true; |
1747 | } | |
49309057 | 1748 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1749 | } |
1750 | else | |
1751 | { | |
79082ff0 L |
1752 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) |
1753 | { | |
1754 | size_t l; | |
1755 | ||
1756 | /* The @@@ syntax is a special case. It renames the | |
1757 | symbol name to versioned_name with one `@' removed. */ | |
1758 | l = strlen (&p[3]) + 1; | |
1759 | memmove (&p [2], &p[3], l); | |
1760 | S_SET_NAME (symp, sy_obj->versioned_name); | |
1761 | } | |
1762 | else | |
1763 | { | |
1764 | symbolS *symp2; | |
252b5132 | 1765 | |
79082ff0 L |
1766 | /* FIXME: Creating a new symbol here is risky. We're |
1767 | in the final loop over the symbol table. We can | |
1768 | get away with it only because the symbol goes to | |
1769 | the end of the list, where the loop will still see | |
1770 | it. It would probably be better to do this in | |
1771 | obj_frob_file_before_adjust. */ | |
252b5132 | 1772 | |
79082ff0 | 1773 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1774 | |
79082ff0 | 1775 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1776 | |
79082ff0 | 1777 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1778 | |
79082ff0 L |
1779 | /* Subtracting out the frag address here is a hack |
1780 | because we are in the middle of the final loop. */ | |
1781 | S_SET_VALUE (symp2, | |
1782 | (S_GET_VALUE (symp) | |
1783 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1784 | |
79082ff0 | 1785 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1786 | |
79082ff0 L |
1787 | /* This will copy over the size information. */ |
1788 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1789 | |
79082ff0 L |
1790 | if (S_IS_WEAK (symp)) |
1791 | S_SET_WEAK (symp2); | |
252b5132 | 1792 | |
79082ff0 L |
1793 | if (S_IS_EXTERNAL (symp)) |
1794 | S_SET_EXTERNAL (symp2); | |
1795 | } | |
252b5132 RH |
1796 | } |
1797 | } | |
1798 | ||
1799 | /* Double check weak symbols. */ | |
49309057 | 1800 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1801 | { |
1802 | if (S_IS_COMMON (symp)) | |
1803 | as_bad (_("Symbol `%s' can not be both weak and common"), | |
1804 | S_GET_NAME (symp)); | |
1805 | } | |
1806 | ||
1807 | #ifdef TC_MIPS | |
1808 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1809 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1810 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1811 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1812 | because that is the only time gcc will generate the necessary | |
1813 | .global directives to mark functions. */ | |
1814 | ||
1815 | if (S_IS_COMMON (symp)) | |
49309057 | 1816 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1817 | |
1818 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1819 | && ! S_IS_DEFINED (symp) |
1820 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1821 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 RH |
1822 | #endif |
1823 | ||
c5e54cc2 ILT |
1824 | #if 0 /* TC_PPC */ |
1825 | /* If TC_PPC is defined, we used to force the type of a symbol to be | |
1826 | BSF_OBJECT if it was otherwise unset. This was required by some | |
1827 | version of VxWorks. Thomas de Lellis <tdel@windriver.com> says | |
1828 | that this is no longer needed, so it is now commented out. */ | |
49309057 ILT |
1829 | if ((symbol_get_bfdsym (symp)->flags |
1830 | & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 | |
252b5132 | 1831 | && S_IS_DEFINED (symp)) |
49309057 | 1832 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1833 | #endif |
1834 | } | |
1835 | ||
1836 | void | |
1837 | elf_frob_file () | |
1838 | { | |
1839 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); | |
1840 | ||
1841 | #ifdef elf_tc_final_processing | |
1842 | elf_tc_final_processing (); | |
1843 | #endif | |
1844 | } | |
1845 | ||
4a1805b1 | 1846 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
1847 | |
1848 | void | |
1849 | elf_frob_file_before_adjust () | |
1850 | { | |
1851 | if (symbol_rootP) | |
1852 | { | |
1853 | symbolS *symp; | |
1854 | ||
1855 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
79082ff0 L |
1856 | if (symbol_get_obj (symp)->versioned_name) |
1857 | { | |
1858 | if (!S_IS_DEFINED (symp)) | |
1859 | { | |
1860 | char *p; | |
1861 | ||
1862 | /* The @@@ syntax is a special case. If the symbol is | |
1863 | not defined, 2 `@'s will be removed from the | |
1864 | versioned_name. */ | |
1865 | ||
1866 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
1867 | ELF_VER_CHR); | |
1868 | know (p != NULL); | |
1869 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) | |
1870 | { | |
1871 | size_t l = strlen (&p[3]) + 1; | |
1872 | memmove (&p [1], &p[3], l); | |
1873 | } | |
1874 | if (symbol_used_p (symp) == 0 | |
1875 | && symbol_used_in_reloc_p (symp) == 0) | |
1876 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1877 | } | |
1878 | } | |
339681c0 L |
1879 | } |
1880 | } | |
1881 | ||
252b5132 RH |
1882 | /* It is required that we let write_relocs have the opportunity to |
1883 | optimize away fixups before output has begun, since it is possible | |
1884 | to eliminate all fixups for a section and thus we never should | |
1885 | have generated the relocation section. */ | |
1886 | ||
1887 | void | |
1888 | elf_frob_file_after_relocs () | |
1889 | { | |
1890 | #ifdef NEED_ECOFF_DEBUG | |
1891 | if (ECOFF_DEBUGGING) | |
1892 | /* Generate the ECOFF debugging information. */ | |
1893 | { | |
1894 | const struct ecoff_debug_swap *debug_swap; | |
1895 | struct ecoff_debug_info debug; | |
1896 | char *buf; | |
1897 | asection *sec; | |
1898 | ||
1899 | debug_swap | |
1900 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1901 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1902 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1903 | ||
1904 | /* Set up the pointers in debug. */ | |
1905 | #define SET(ptr, offset, type) \ | |
1906 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1907 | ||
1908 | SET (line, cbLineOffset, unsigned char *); | |
1909 | SET (external_dnr, cbDnOffset, PTR); | |
1910 | SET (external_pdr, cbPdOffset, PTR); | |
1911 | SET (external_sym, cbSymOffset, PTR); | |
1912 | SET (external_opt, cbOptOffset, PTR); | |
1913 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1914 | SET (ss, cbSsOffset, char *); | |
1915 | SET (external_fdr, cbFdOffset, PTR); | |
1916 | SET (external_rfd, cbRfdOffset, PTR); | |
1917 | /* ssext and external_ext are set up just below. */ | |
1918 | ||
1919 | #undef SET | |
1920 | ||
1921 | /* Set up the external symbols. */ | |
1922 | debug.ssext = debug.ssext_end = NULL; | |
1923 | debug.external_ext = debug.external_ext_end = NULL; | |
1924 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1925 | elf_get_extr, elf_set_index)) | |
1926 | as_fatal (_("Failed to set up debugging information: %s"), | |
1927 | bfd_errmsg (bfd_get_error ())); | |
1928 | ||
1929 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1930 | assert (sec != NULL); | |
1931 | ||
1932 | know (stdoutput->output_has_begun == false); | |
1933 | ||
1934 | /* We set the size of the section, call bfd_set_section_contents | |
1935 | to force the ELF backend to allocate a file position, and then | |
1936 | write out the data. FIXME: Is this really the best way to do | |
1937 | this? */ | |
1938 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1939 | ||
5f91fe03 ILT |
1940 | /* Pass BUF to bfd_set_section_contents because this will |
1941 | eventually become a call to fwrite, and ISO C prohibits | |
1942 | passing a NULL pointer to a stdio function even if the | |
1943 | pointer will not be used. */ | |
1944 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf, | |
252b5132 RH |
1945 | (file_ptr) 0, (bfd_size_type) 0)) |
1946 | as_fatal (_("Can't start writing .mdebug section: %s"), | |
1947 | bfd_errmsg (bfd_get_error ())); | |
1948 | ||
1949 | know (stdoutput->output_has_begun == true); | |
1950 | know (sec->filepos != 0); | |
1951 | ||
1952 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1953 | sec->filepos)) | |
1954 | as_fatal (_("Could not write .mdebug section: %s"), | |
1955 | bfd_errmsg (bfd_get_error ())); | |
1956 | } | |
1957 | #endif /* NEED_ECOFF_DEBUG */ | |
1958 | } | |
1959 | ||
1960 | #ifdef SCO_ELF | |
1961 | ||
1962 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1963 | SCO specific identifier in the .notes section to satisfy the SCO | |
1964 | linker. | |
1965 | ||
1966 | This looks more complicated than it really is. As opposed to the | |
1967 | "obvious" solution, this should handle the cross dev cases | |
1968 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1969 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1970 | should be exactly one of these sections per object module. | |
1971 | ||
1972 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
1973 | .note section. | |
1974 | ||
fa306131 AM |
1975 | int_32 namesz = 4 ; Name size |
1976 | int_32 descsz = 12 ; Descriptive information | |
1977 | int_32 type = 1 ; | |
1978 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
1979 | int_32 version = (major ver # << 16) | version of tools ; |
1980 | int_32 source = (tool_id << 16 ) | 1 ; | |
1981 | int_32 info = 0 ; These are set by the SCO tools, but we | |
fa306131 | 1982 | don't know enough about the source |
252b5132 RH |
1983 | environment to set them. SCO ld currently |
1984 | ignores them, and recommends we set them | |
1985 | to zero. */ | |
1986 | ||
1987 | #define SCO_MAJOR_VERSION 0x1 | |
1988 | #define SCO_MINOR_VERSION 0x1 | |
1989 | ||
1990 | void | |
1991 | sco_id () | |
1992 | { | |
1993 | ||
1994 | char *name; | |
1995 | unsigned int c; | |
1996 | char ch; | |
1997 | char *p; | |
1998 | asection *seg = now_seg; | |
1999 | subsegT subseg = now_subseg; | |
2000 | Elf_Internal_Note i_note; | |
2001 | Elf_External_Note e_note; | |
2002 | asection *note_secp = (asection *) NULL; | |
2003 | int i, len; | |
2004 | ||
2005 | /* create the .note section */ | |
2006 | ||
2007 | note_secp = subseg_new (".note", 0); | |
2008 | bfd_set_section_flags (stdoutput, | |
2009 | note_secp, | |
2010 | SEC_HAS_CONTENTS | SEC_READONLY); | |
2011 | ||
2012 | /* process the version string */ | |
2013 | ||
fa306131 | 2014 | i_note.namesz = 4; |
252b5132 RH |
2015 | i_note.descsz = 12; /* 12 descriptive bytes */ |
2016 | i_note.type = NT_VERSION; /* Contains a version string */ | |
2017 | ||
2018 | p = frag_more (sizeof (i_note.namesz)); | |
2019 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
2020 | ||
2021 | p = frag_more (sizeof (i_note.descsz)); | |
2022 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
2023 | ||
2024 | p = frag_more (sizeof (i_note.type)); | |
2025 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
2026 | ||
2027 | p = frag_more (4); | |
fa306131 | 2028 | strcpy (p, "SCO"); |
252b5132 RH |
2029 | |
2030 | /* Note: this is the version number of the ELF we're representing */ | |
2031 | p = frag_more (4); | |
2032 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2033 | ||
2034 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2035 | it with SCO. The bottom bit shows that we are compat with the | |
2036 | SCO ABI. */ | |
2037 | p = frag_more (4); | |
2038 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2039 | ||
2040 | /* If we knew (or cared) what the source language options were, we'd | |
2041 | fill them in here. SCO has given us permission to ignore these | |
2042 | and just set them to zero. */ | |
2043 | p = frag_more (4); | |
2044 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2045 | |
252b5132 RH |
2046 | frag_align (2, 0, 0); |
2047 | ||
2048 | /* We probably can't restore the current segment, for there likely | |
2049 | isn't one yet... */ | |
2050 | if (seg && subseg) | |
2051 | subseg_set (seg, subseg); | |
2052 | ||
2053 | } | |
2054 | ||
2055 | #endif /* SCO_ELF */ | |
2056 | ||
5110c57e HPN |
2057 | static int |
2058 | elf_separate_stab_sections () | |
2059 | { | |
2060 | #ifdef NEED_ECOFF_DEBUG | |
2061 | return (!ECOFF_DEBUGGING); | |
2062 | #else | |
2063 | return 1; | |
2064 | #endif | |
2065 | } | |
2066 | ||
2067 | static void | |
2068 | elf_init_stab_section (seg) | |
2069 | segT seg; | |
2070 | { | |
2071 | #ifdef NEED_ECOFF_DEBUG | |
2072 | if (!ECOFF_DEBUGGING) | |
2073 | #endif | |
2074 | obj_elf_init_stab_section (seg); | |
2075 | } | |
2076 | ||
252b5132 RH |
2077 | const struct format_ops elf_format_ops = |
2078 | { | |
2079 | bfd_target_elf_flavour, | |
4c63da97 AM |
2080 | 0, /* dfl_leading_underscore */ |
2081 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2082 | elf_begin, |
2083 | elf_file_symbol, | |
252b5132 RH |
2084 | elf_frob_symbol, |
2085 | elf_frob_file, | |
339681c0 | 2086 | elf_frob_file_before_adjust, |
252b5132 RH |
2087 | elf_frob_file_after_relocs, |
2088 | elf_s_get_size, elf_s_set_size, | |
2089 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2090 | elf_s_get_other, |
5110c57e | 2091 | elf_s_set_other, |
4c63da97 | 2092 | 0, /* s_get_desc */ |
5110c57e HPN |
2093 | 0, /* s_set_desc */ |
2094 | 0, /* s_get_type */ | |
2095 | 0, /* s_set_type */ | |
252b5132 RH |
2096 | elf_copy_symbol_attributes, |
2097 | #ifdef NEED_ECOFF_DEBUG | |
2098 | ecoff_generate_asm_lineno, | |
2099 | ecoff_stab, | |
2100 | #else | |
4c63da97 AM |
2101 | 0, /* generate_asm_lineno */ |
2102 | 0, /* process_stab */ | |
252b5132 | 2103 | #endif |
5110c57e HPN |
2104 | elf_separate_stab_sections, |
2105 | elf_init_stab_section, | |
252b5132 RH |
2106 | elf_sec_sym_ok_for_reloc, |
2107 | elf_pop_insert, | |
2108 | #ifdef NEED_ECOFF_DEBUG | |
2109 | elf_ecoff_set_ext, | |
2110 | #else | |
4c63da97 | 2111 | 0, /* ecoff_set_ext */ |
252b5132 | 2112 | #endif |
4c63da97 | 2113 | elf_obj_read_begin_hook, |
5110c57e | 2114 | elf_obj_symbol_new_hook |
252b5132 | 2115 | }; |