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" | |
3882b010 | 24 | #include "safe-ctype.h" |
252b5132 RH |
25 | #include "subsegs.h" |
26 | #include "obstack.h" | |
27 | ||
28 | #ifndef ECOFF_DEBUGGING | |
29 | #define ECOFF_DEBUGGING 0 | |
30 | #else | |
31 | #define NEED_ECOFF_DEBUG | |
32 | #endif | |
33 | ||
34 | #ifdef NEED_ECOFF_DEBUG | |
35 | #include "ecoff.h" | |
36 | #endif | |
37 | ||
38 | #ifdef TC_ALPHA | |
39 | #include "elf/alpha.h" | |
40 | #endif | |
41 | ||
42 | #ifdef TC_MIPS | |
43 | #include "elf/mips.h" | |
44 | #endif | |
45 | ||
46 | #ifdef TC_PPC | |
47 | #include "elf/ppc.h" | |
48 | #endif | |
49 | ||
5b93d8bb AM |
50 | #ifdef TC_I370 |
51 | #include "elf/i370.h" | |
52 | #endif | |
53 | ||
252b5132 RH |
54 | static bfd_vma elf_s_get_size PARAMS ((symbolS *)); |
55 | static void elf_s_set_size PARAMS ((symbolS *, bfd_vma)); | |
56 | static bfd_vma elf_s_get_align PARAMS ((symbolS *)); | |
57 | static void elf_s_set_align PARAMS ((symbolS *, bfd_vma)); | |
5110c57e | 58 | static void elf_s_set_other PARAMS ((symbolS *, int)); |
252b5132 RH |
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)); |
8d28c9d7 AM |
77 | static void obj_elf_change_section PARAMS ((char *, int, int, int, int)); |
78 | static int obj_elf_parse_section_letters PARAMS ((char *, size_t)); | |
79 | static int obj_elf_section_word PARAMS ((char *, size_t)); | |
80 | static int obj_elf_section_type PARAMS ((char *, size_t)); | |
252b5132 | 81 | static void obj_elf_symver PARAMS ((int)); |
252b5132 | 82 | static void obj_elf_subsection PARAMS ((int)); |
9de8d8f1 | 83 | static void obj_elf_popsection PARAMS ((int)); |
252b5132 RH |
84 | |
85 | static const pseudo_typeS elf_pseudo_table[] = | |
86 | { | |
87 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 88 | {"common", obj_elf_common, 1}, |
252b5132 RH |
89 | {"ident", obj_elf_ident, 0}, |
90 | {"local", obj_elf_local, 0}, | |
91 | {"previous", obj_elf_previous, 0}, | |
92 | {"section", obj_elf_section, 0}, | |
93 | {"section.s", obj_elf_section, 0}, | |
94 | {"sect", obj_elf_section, 0}, | |
95 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
96 | {"pushsection", obj_elf_section, 1}, |
97 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
98 | {"size", obj_elf_size, 0}, |
99 | {"type", obj_elf_type, 0}, | |
100 | {"version", obj_elf_version, 0}, | |
101 | {"weak", obj_elf_weak, 0}, | |
102 | ||
bf514e21 | 103 | /* These define symbol visibility. */ |
2e13b764 NC |
104 | {"internal", obj_elf_visibility, STV_INTERNAL}, |
105 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
106 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
107 | ||
252b5132 RH |
108 | /* These are used for stabs-in-elf configurations. */ |
109 | {"line", obj_elf_line, 0}, | |
110 | ||
111 | /* This is a GNU extension to handle symbol versions. */ | |
112 | {"symver", obj_elf_symver, 0}, | |
113 | ||
114 | /* A GNU extension to change subsection only. */ | |
115 | {"subsection", obj_elf_subsection, 0}, | |
116 | ||
117 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
904a31bf AM |
118 | {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0}, |
119 | {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0}, | |
252b5132 | 120 | |
bf514e21 | 121 | /* These are used for dwarf. */ |
252b5132 RH |
122 | {"2byte", cons, 2}, |
123 | {"4byte", cons, 4}, | |
124 | {"8byte", cons, 8}, | |
125 | ||
126 | /* We need to trap the section changing calls to handle .previous. */ | |
127 | {"data", obj_elf_data, 0}, | |
128 | {"text", obj_elf_text, 0}, | |
129 | ||
130 | /* End sentinel. */ | |
ab9da554 | 131 | {NULL, NULL, 0}, |
252b5132 RH |
132 | }; |
133 | ||
134 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
135 | { | |
136 | #ifdef NEED_ECOFF_DEBUG | |
137 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
138 | is used instead. */ | |
139 | { "def", ecoff_directive_def, 0 }, | |
140 | { "dim", ecoff_directive_dim, 0 }, | |
141 | { "endef", ecoff_directive_endef, 0 }, | |
142 | { "file", ecoff_directive_file, 0 }, | |
143 | { "scl", ecoff_directive_scl, 0 }, | |
144 | { "tag", ecoff_directive_tag, 0 }, | |
145 | { "val", ecoff_directive_val, 0 }, | |
146 | ||
147 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
148 | already has meanings for those. We use .esize and .etype | |
149 | instead. These are only generated by gcc anyhow. */ | |
150 | { "esize", ecoff_directive_size, 0 }, | |
151 | { "etype", ecoff_directive_type, 0 }, | |
152 | ||
153 | /* ECOFF specific debugging information. */ | |
154 | { "begin", ecoff_directive_begin, 0 }, | |
155 | { "bend", ecoff_directive_bend, 0 }, | |
156 | { "end", ecoff_directive_end, 0 }, | |
157 | { "ent", ecoff_directive_ent, 0 }, | |
158 | { "fmask", ecoff_directive_fmask, 0 }, | |
159 | { "frame", ecoff_directive_frame, 0 }, | |
160 | { "loc", ecoff_directive_loc, 0 }, | |
161 | { "mask", ecoff_directive_mask, 0 }, | |
162 | ||
163 | /* Other ECOFF directives. */ | |
164 | { "extern", ecoff_directive_extern, 0 }, | |
165 | ||
166 | /* These are used on Irix. I don't know how to implement them. */ | |
167 | { "alias", s_ignore, 0 }, | |
168 | { "bgnb", s_ignore, 0 }, | |
169 | { "endb", s_ignore, 0 }, | |
170 | { "lab", s_ignore, 0 }, | |
171 | { "noalias", s_ignore, 0 }, | |
172 | { "verstamp", s_ignore, 0 }, | |
173 | { "vreg", s_ignore, 0 }, | |
174 | #endif | |
175 | ||
ab9da554 | 176 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
177 | }; |
178 | ||
179 | #undef NO_RELOC | |
180 | #include "aout/aout64.h" | |
181 | ||
182 | /* This is called when the assembler starts. */ | |
183 | ||
184 | void | |
185 | elf_begin () | |
186 | { | |
187 | /* Add symbols for the known sections to the symbol table. */ | |
188 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
189 | TEXT_SECTION_NAME))); | |
190 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
191 | DATA_SECTION_NAME))); | |
192 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
193 | BSS_SECTION_NAME))); | |
194 | } | |
195 | ||
196 | void | |
197 | elf_pop_insert () | |
198 | { | |
199 | pop_insert (elf_pseudo_table); | |
200 | if (ECOFF_DEBUGGING) | |
201 | pop_insert (ecoff_debug_pseudo_table); | |
202 | } | |
203 | ||
204 | static bfd_vma | |
205 | elf_s_get_size (sym) | |
206 | symbolS *sym; | |
207 | { | |
208 | return S_GET_SIZE (sym); | |
209 | } | |
210 | ||
211 | static void | |
212 | elf_s_set_size (sym, sz) | |
213 | symbolS *sym; | |
214 | bfd_vma sz; | |
215 | { | |
216 | S_SET_SIZE (sym, sz); | |
217 | } | |
218 | ||
219 | static bfd_vma | |
220 | elf_s_get_align (sym) | |
221 | symbolS *sym; | |
222 | { | |
223 | return S_GET_ALIGN (sym); | |
224 | } | |
225 | ||
226 | static void | |
227 | elf_s_set_align (sym, align) | |
228 | symbolS *sym; | |
229 | bfd_vma align; | |
230 | { | |
231 | S_SET_ALIGN (sym, align); | |
232 | } | |
233 | ||
4c63da97 AM |
234 | int |
235 | elf_s_get_other (sym) | |
236 | symbolS *sym; | |
237 | { | |
238 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
239 | } | |
240 | ||
5110c57e HPN |
241 | static void |
242 | elf_s_set_other (sym, other) | |
243 | symbolS *sym; | |
244 | int other; | |
245 | { | |
246 | S_SET_OTHER (sym, other); | |
247 | } | |
248 | ||
252b5132 RH |
249 | static int |
250 | elf_sec_sym_ok_for_reloc (sec) | |
251 | asection *sec; | |
252 | { | |
253 | return obj_sec_sym_ok_for_reloc (sec); | |
254 | } | |
255 | ||
256 | void | |
257 | elf_file_symbol (s) | |
5110c57e | 258 | const char *s; |
252b5132 RH |
259 | { |
260 | symbolS *sym; | |
261 | ||
262 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
49309057 ILT |
263 | symbol_set_frag (sym, &zero_address_frag); |
264 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 RH |
265 | |
266 | if (symbol_rootP != sym) | |
267 | { | |
268 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
269 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
270 | #ifdef DEBUG | |
271 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
272 | #endif | |
273 | } | |
274 | ||
275 | #ifdef NEED_ECOFF_DEBUG | |
276 | ecoff_new_file (s); | |
277 | #endif | |
278 | } | |
279 | ||
16b93d88 | 280 | void |
9be1cda6 AS |
281 | obj_elf_common (is_common) |
282 | int is_common; | |
252b5132 RH |
283 | { |
284 | char *name; | |
285 | char c; | |
286 | char *p; | |
287 | int temp, size; | |
288 | symbolS *symbolP; | |
289 | int have_align; | |
290 | ||
9be1cda6 AS |
291 | if (flag_mri && is_common) |
292 | { | |
293 | s_mri_common (0); | |
294 | return; | |
295 | } | |
296 | ||
252b5132 RH |
297 | name = input_line_pointer; |
298 | c = get_symbol_end (); | |
299 | /* just after name is now '\0' */ | |
300 | p = input_line_pointer; | |
301 | *p = c; | |
302 | SKIP_WHITESPACE (); | |
303 | if (*input_line_pointer != ',') | |
304 | { | |
305 | as_bad (_("Expected comma after symbol-name")); | |
306 | ignore_rest_of_line (); | |
307 | return; | |
308 | } | |
309 | input_line_pointer++; /* skip ',' */ | |
310 | if ((temp = get_absolute_expression ()) < 0) | |
311 | { | |
312 | as_bad (_(".COMMon length (%d.) <0! Ignored."), temp); | |
313 | ignore_rest_of_line (); | |
314 | return; | |
315 | } | |
316 | size = temp; | |
317 | *p = 0; | |
318 | symbolP = symbol_find_or_make (name); | |
319 | *p = c; | |
320 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
321 | { | |
322 | as_bad (_("Ignoring attempt to re-define symbol")); | |
323 | ignore_rest_of_line (); | |
324 | return; | |
325 | } | |
326 | if (S_GET_VALUE (symbolP) != 0) | |
327 | { | |
ab9da554 | 328 | if (S_GET_VALUE (symbolP) != (valueT) size) |
252b5132 RH |
329 | { |
330 | as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."), | |
331 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
332 | } | |
333 | } | |
334 | know (symbolP->sy_frag == &zero_address_frag); | |
335 | if (*input_line_pointer != ',') | |
336 | have_align = 0; | |
337 | else | |
338 | { | |
339 | have_align = 1; | |
340 | input_line_pointer++; | |
341 | SKIP_WHITESPACE (); | |
342 | } | |
343 | if (! have_align || *input_line_pointer != '"') | |
344 | { | |
345 | if (! have_align) | |
346 | temp = 0; | |
347 | else | |
348 | { | |
349 | temp = get_absolute_expression (); | |
350 | if (temp < 0) | |
351 | { | |
352 | temp = 0; | |
353 | as_warn (_("Common alignment negative; 0 assumed")); | |
354 | } | |
355 | } | |
49309057 | 356 | if (symbol_get_obj (symbolP)->local) |
252b5132 RH |
357 | { |
358 | segT old_sec; | |
359 | int old_subsec; | |
360 | char *pfrag; | |
361 | int align; | |
362 | ||
363 | /* allocate_bss: */ | |
364 | old_sec = now_seg; | |
365 | old_subsec = now_subseg; | |
366 | if (temp) | |
367 | { | |
368 | /* convert to a power of 2 alignment */ | |
369 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
370 | if (temp != 1) | |
371 | { | |
372 | as_bad (_("Common alignment not a power of 2")); | |
373 | ignore_rest_of_line (); | |
374 | return; | |
375 | } | |
376 | } | |
377 | else | |
378 | align = 0; | |
379 | record_alignment (bss_section, align); | |
380 | subseg_set (bss_section, 0); | |
381 | if (align) | |
382 | frag_align (align, 0, 0); | |
383 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
49309057 ILT |
384 | symbol_get_frag (symbolP)->fr_symbol = 0; |
385 | symbol_set_frag (symbolP, frag_now); | |
252b5132 RH |
386 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
387 | (offsetT) size, (char *) 0); | |
388 | *pfrag = 0; | |
389 | S_SET_SIZE (symbolP, size); | |
390 | S_SET_SEGMENT (symbolP, bss_section); | |
391 | S_CLEAR_EXTERNAL (symbolP); | |
392 | subseg_set (old_sec, old_subsec); | |
393 | } | |
394 | else | |
395 | { | |
396 | allocate_common: | |
397 | S_SET_VALUE (symbolP, (valueT) size); | |
398 | S_SET_ALIGN (symbolP, temp); | |
399 | S_SET_EXTERNAL (symbolP); | |
400 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
401 | } | |
402 | } | |
403 | else | |
404 | { | |
405 | input_line_pointer++; | |
406 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
407 | if (*input_line_pointer == '.') | |
408 | input_line_pointer++; | |
409 | /* @@ Some say data, some say bss. */ | |
410 | if (strncmp (input_line_pointer, "bss\"", 4) | |
411 | && strncmp (input_line_pointer, "data\"", 5)) | |
412 | { | |
413 | while (*--input_line_pointer != '"') | |
414 | ; | |
415 | input_line_pointer--; | |
416 | goto bad_common_segment; | |
417 | } | |
418 | while (*input_line_pointer++ != '"') | |
419 | ; | |
420 | goto allocate_common; | |
421 | } | |
422 | ||
49309057 | 423 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 RH |
424 | |
425 | demand_empty_rest_of_line (); | |
426 | return; | |
427 | ||
428 | { | |
429 | bad_common_segment: | |
430 | p = input_line_pointer; | |
431 | while (*p && *p != '\n') | |
432 | p++; | |
433 | c = *p; | |
434 | *p = '\0'; | |
435 | as_bad (_("bad .common segment %s"), input_line_pointer + 1); | |
436 | *p = c; | |
437 | input_line_pointer = p; | |
438 | ignore_rest_of_line (); | |
439 | return; | |
440 | } | |
441 | } | |
442 | ||
443 | static void | |
444 | obj_elf_local (ignore) | |
ab9da554 | 445 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
446 | { |
447 | char *name; | |
448 | int c; | |
449 | symbolS *symbolP; | |
450 | ||
451 | do | |
452 | { | |
453 | name = input_line_pointer; | |
454 | c = get_symbol_end (); | |
455 | symbolP = symbol_find_or_make (name); | |
456 | *input_line_pointer = c; | |
457 | SKIP_WHITESPACE (); | |
458 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 459 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
460 | if (c == ',') |
461 | { | |
462 | input_line_pointer++; | |
463 | SKIP_WHITESPACE (); | |
464 | if (*input_line_pointer == '\n') | |
465 | c = '\n'; | |
466 | } | |
467 | } | |
468 | while (c == ','); | |
469 | demand_empty_rest_of_line (); | |
470 | } | |
471 | ||
472 | static void | |
473 | obj_elf_weak (ignore) | |
ab9da554 | 474 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
475 | { |
476 | char *name; | |
477 | int c; | |
478 | symbolS *symbolP; | |
479 | ||
480 | do | |
481 | { | |
482 | name = input_line_pointer; | |
483 | c = get_symbol_end (); | |
484 | symbolP = symbol_find_or_make (name); | |
485 | *input_line_pointer = c; | |
486 | SKIP_WHITESPACE (); | |
487 | S_SET_WEAK (symbolP); | |
49309057 | 488 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
489 | if (c == ',') |
490 | { | |
491 | input_line_pointer++; | |
492 | SKIP_WHITESPACE (); | |
493 | if (*input_line_pointer == '\n') | |
494 | c = '\n'; | |
495 | } | |
496 | } | |
497 | while (c == ','); | |
498 | demand_empty_rest_of_line (); | |
499 | } | |
500 | ||
2e13b764 NC |
501 | static void |
502 | obj_elf_visibility (visibility) | |
503 | int visibility; | |
504 | { | |
505 | char *name; | |
506 | int c; | |
507 | symbolS *symbolP; | |
508 | asymbol *bfdsym; | |
509 | elf_symbol_type *elfsym; | |
510 | ||
511 | do | |
512 | { | |
513 | name = input_line_pointer; | |
514 | c = get_symbol_end (); | |
515 | symbolP = symbol_find_or_make (name); | |
516 | *input_line_pointer = c; | |
fa306131 | 517 | |
2e13b764 | 518 | SKIP_WHITESPACE (); |
fa306131 | 519 | |
2e13b764 NC |
520 | bfdsym = symbol_get_bfdsym (symbolP); |
521 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 522 | |
2e13b764 | 523 | assert (elfsym); |
fa306131 | 524 | |
2e13b764 | 525 | elfsym->internal_elf_sym.st_other = visibility; |
fa306131 | 526 | |
2e13b764 NC |
527 | if (c == ',') |
528 | { | |
529 | input_line_pointer ++; | |
fa306131 | 530 | |
2e13b764 | 531 | SKIP_WHITESPACE (); |
fa306131 | 532 | |
2e13b764 NC |
533 | if (*input_line_pointer == '\n') |
534 | c = '\n'; | |
535 | } | |
536 | } | |
537 | while (c == ','); | |
fa306131 | 538 | |
2e13b764 NC |
539 | demand_empty_rest_of_line (); |
540 | } | |
541 | ||
252b5132 RH |
542 | static segT previous_section; |
543 | static int previous_subsection; | |
544 | ||
9de8d8f1 RH |
545 | struct section_stack |
546 | { | |
547 | struct section_stack *next; | |
548 | segT seg, prev_seg; | |
549 | int subseg, prev_subseg; | |
550 | }; | |
551 | ||
552 | static struct section_stack *section_stack; | |
553 | ||
252b5132 RH |
554 | /* Handle the .section pseudo-op. This code supports two different |
555 | syntaxes. | |
556 | ||
557 | The first is found on Solaris, and looks like | |
558 | .section ".sec1",#alloc,#execinstr,#write | |
559 | Here the names after '#' are the SHF_* flags to turn on for the | |
560 | section. I'm not sure how it determines the SHT_* type (BFD | |
561 | doesn't really give us control over the type, anyhow). | |
562 | ||
563 | The second format is found on UnixWare, and probably most SVR4 | |
564 | machines, and looks like | |
565 | .section .sec1,"a",@progbits | |
566 | The quoted string may contain any combination of a, w, x, and | |
567 | represents the SHF_* flags to turn on for the section. The string | |
568 | beginning with '@' can be progbits or nobits. There should be | |
569 | other possibilities, but I don't know what they are. In any case, | |
570 | BFD doesn't really let us set the section type. */ | |
571 | ||
572 | /* Certain named sections have particular defined types, listed on p. | |
573 | 4-19 of the ABI. */ | |
574 | struct special_section | |
575 | { | |
576 | const char *name; | |
577 | int type; | |
578 | int attributes; | |
579 | }; | |
580 | ||
9de8d8f1 | 581 | static struct special_section const special_sections[] = |
252b5132 RH |
582 | { |
583 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
584 | { ".comment", SHT_PROGBITS, 0 }, | |
585 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
586 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
587 | { ".debug", SHT_PROGBITS, 0 }, | |
588 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
589 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
590 | { ".line", SHT_PROGBITS, 0 }, | |
591 | { ".note", SHT_NOTE, 0 }, | |
592 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
593 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
594 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
595 | ||
596 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
597 | ELF_TC_SPECIAL_SECTIONS | |
598 | #endif | |
599 | ||
600 | #if 0 | |
601 | /* The following section names are special, but they can not | |
602 | reasonably appear in assembler code. Some of the attributes are | |
603 | processor dependent. */ | |
604 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
605 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
606 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
607 | { ".got", SHT_PROGBITS, 0 }, | |
608 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
609 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
610 | { ".plt", SHT_PROGBITS, 0 }, | |
611 | { ".shstrtab",SHT_STRTAB, 0 }, | |
612 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
613 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
614 | #endif | |
615 | ||
616 | { NULL, 0, 0 } | |
617 | }; | |
618 | ||
8d28c9d7 | 619 | static void |
f5fa8ca2 | 620 | obj_elf_change_section (name, type, attr, entsize, push) |
9de8d8f1 | 621 | char *name; |
f5fa8ca2 | 622 | int type, attr, entsize, push; |
252b5132 | 623 | { |
742f45cf | 624 | asection *old_sec; |
252b5132 | 625 | segT sec; |
742f45cf AM |
626 | flagword flags; |
627 | int i; | |
252b5132 RH |
628 | |
629 | #ifdef md_flush_pending_output | |
630 | md_flush_pending_output (); | |
631 | #endif | |
632 | ||
9de8d8f1 RH |
633 | /* Switch to the section, creating it if necessary. */ |
634 | if (push) | |
635 | { | |
636 | struct section_stack *elt; | |
637 | elt = xmalloc (sizeof (struct section_stack)); | |
638 | elt->next = section_stack; | |
639 | elt->seg = now_seg; | |
640 | elt->prev_seg = previous_section; | |
641 | elt->subseg = now_subseg; | |
642 | elt->prev_subseg = previous_subsection; | |
643 | section_stack = elt; | |
644 | } | |
645 | previous_section = now_seg; | |
646 | previous_subsection = now_subseg; | |
647 | ||
742f45cf | 648 | old_sec = bfd_get_section_by_name (stdoutput, name); |
9de8d8f1 RH |
649 | sec = subseg_new (name, 0); |
650 | ||
742f45cf AM |
651 | /* See if this is one of the special sections. */ |
652 | for (i = 0; special_sections[i].name != NULL; i++) | |
653 | if (strcmp (name, special_sections[i].name) == 0) | |
654 | { | |
655 | if (type == SHT_NULL) | |
656 | type = special_sections[i].type; | |
657 | else if (type != special_sections[i].type) | |
658 | { | |
659 | if (old_sec == NULL) | |
9de8d8f1 | 660 | { |
742f45cf AM |
661 | as_warn (_("Setting incorrect section type for %s"), name); |
662 | } | |
663 | else | |
664 | { | |
665 | as_warn (_("Ignoring incorrect section type for %s"), name); | |
666 | type = special_sections[i].type; | |
9de8d8f1 | 667 | } |
9de8d8f1 | 668 | } |
742f45cf AM |
669 | if ((attr &~ special_sections[i].attributes) != 0 |
670 | && old_sec == NULL) | |
671 | { | |
672 | /* As a GNU extension, we permit a .note section to be | |
673 | allocatable. If the linker sees an allocateable .note | |
674 | section, it will create a PT_NOTE segment in the output | |
675 | file. */ | |
676 | if (strcmp (name, ".note") != 0 | |
677 | || attr != SHF_ALLOC) | |
678 | as_warn (_("Setting incorrect section attributes for %s"), | |
679 | name); | |
680 | } | |
681 | attr |= special_sections[i].attributes; | |
682 | break; | |
683 | } | |
684 | ||
685 | /* Convert ELF type and flags to BFD flags. */ | |
686 | flags = (SEC_RELOC | |
687 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
688 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
689 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
690 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
691 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
692 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)); | |
9de8d8f1 | 693 | #ifdef md_elf_section_flags |
742f45cf | 694 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
695 | #endif |
696 | ||
742f45cf AM |
697 | if (old_sec == NULL) |
698 | { | |
699 | symbolS *secsym; | |
700 | ||
9de8d8f1 RH |
701 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
702 | if (type == SHT_NOBITS) | |
703 | seg_info (sec)->bss = 1; | |
704 | ||
705 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
706 | if (flags & SEC_MERGE) |
707 | sec->entsize = entsize; | |
9de8d8f1 RH |
708 | |
709 | /* Add a symbol for this section to the symbol table. */ | |
710 | secsym = symbol_find (name); | |
711 | if (secsym != NULL) | |
712 | symbol_set_bfdsym (secsym, sec->symbol); | |
713 | else | |
714 | symbol_table_insert (section_symbol (sec)); | |
715 | } | |
742f45cf AM |
716 | else if (attr != 0) |
717 | { | |
718 | /* If section attributes are specified the second time we see a | |
719 | particular section, then check that they are the same as we | |
720 | saw the first time. */ | |
721 | if ((old_sec->flags ^ flags) | |
722 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
f5fa8ca2 | 723 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS)) |
742f45cf | 724 | as_warn (_("Ignoring changed section attributes for %s"), name); |
0e1a166b | 725 | else if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize) |
f5fa8ca2 | 726 | as_warn (_("Ignoring changed section entity size for %s"), name); |
742f45cf | 727 | } |
9de8d8f1 RH |
728 | |
729 | #ifdef md_elf_section_change_hook | |
742f45cf | 730 | md_elf_section_change_hook (); |
9de8d8f1 RH |
731 | #endif |
732 | } | |
733 | ||
8d28c9d7 | 734 | static int |
9de8d8f1 RH |
735 | obj_elf_parse_section_letters (str, len) |
736 | char *str; | |
737 | size_t len; | |
738 | { | |
739 | int attr = 0; | |
740 | ||
741 | while (len > 0) | |
742 | { | |
743 | switch (*str) | |
744 | { | |
745 | case 'a': | |
746 | attr |= SHF_ALLOC; | |
747 | break; | |
748 | case 'w': | |
749 | attr |= SHF_WRITE; | |
750 | break; | |
751 | case 'x': | |
752 | attr |= SHF_EXECINSTR; | |
753 | break; | |
9469ddf0 | 754 | case 'M': |
f5fa8ca2 JJ |
755 | attr |= SHF_MERGE; |
756 | break; | |
9469ddf0 | 757 | case 'S': |
f5fa8ca2 JJ |
758 | attr |= SHF_STRINGS; |
759 | break; | |
9de8d8f1 RH |
760 | default: |
761 | { | |
9469ddf0 | 762 | char *bad_msg = _("Unrecognized .section attribute: want a,w,x,M,S"); |
9de8d8f1 RH |
763 | #ifdef md_elf_section_letter |
764 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
765 | if (md_attr >= 0) | |
766 | attr |= md_attr; | |
767 | else | |
768 | #endif | |
769 | { | |
4c63da97 | 770 | as_warn ("%s", bad_msg); |
9de8d8f1 RH |
771 | attr = -1; |
772 | } | |
773 | } | |
774 | break; | |
775 | } | |
776 | str++, len--; | |
777 | } | |
778 | ||
779 | return attr; | |
780 | } | |
781 | ||
8d28c9d7 | 782 | static int |
9de8d8f1 RH |
783 | obj_elf_section_word (str, len) |
784 | char *str; | |
785 | size_t len; | |
786 | { | |
787 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
788 | return SHF_WRITE; | |
789 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
790 | return SHF_ALLOC; | |
791 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
792 | return SHF_EXECINSTR; | |
793 | ||
794 | #ifdef md_elf_section_word | |
795 | { | |
796 | int md_attr = md_elf_section_word (str, len); | |
797 | if (md_attr >= 0) | |
798 | return md_attr; | |
799 | } | |
800 | #endif | |
801 | ||
802 | as_warn (_("Unrecognized section attribute")); | |
803 | return 0; | |
804 | } | |
805 | ||
8d28c9d7 | 806 | static int |
9de8d8f1 RH |
807 | obj_elf_section_type (str, len) |
808 | char *str; | |
809 | size_t len; | |
810 | { | |
811 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
812 | return SHT_PROGBITS; | |
813 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
814 | return SHT_NOBITS; | |
815 | ||
816 | #ifdef md_elf_section_type | |
817 | { | |
818 | int md_type = md_elf_section_type (str, len); | |
819 | if (md_type >= 0) | |
820 | return md_type; | |
821 | } | |
822 | #endif | |
823 | ||
824 | as_warn (_("Unrecognized section type")); | |
825 | return 0; | |
826 | } | |
827 | ||
828 | void | |
829 | obj_elf_section (push) | |
830 | int push; | |
831 | { | |
832 | char *name, *beg, *end; | |
833 | int type, attr, dummy; | |
f5fa8ca2 | 834 | int entsize; |
9de8d8f1 | 835 | |
5b93d8bb | 836 | #ifndef TC_I370 |
252b5132 RH |
837 | if (flag_mri) |
838 | { | |
839 | char mri_type; | |
840 | ||
9de8d8f1 | 841 | #ifdef md_flush_pending_output |
60bcf0fa | 842 | md_flush_pending_output (); |
9de8d8f1 RH |
843 | #endif |
844 | ||
252b5132 RH |
845 | previous_section = now_seg; |
846 | previous_subsection = now_subseg; | |
847 | ||
848 | s_mri_sect (&mri_type); | |
849 | ||
850 | #ifdef md_elf_section_change_hook | |
851 | md_elf_section_change_hook (); | |
852 | #endif | |
853 | ||
854 | return; | |
855 | } | |
5b93d8bb | 856 | #endif /* ! defined (TC_I370) */ |
252b5132 RH |
857 | |
858 | /* Get name of section. */ | |
859 | SKIP_WHITESPACE (); | |
860 | if (*input_line_pointer == '"') | |
861 | { | |
9de8d8f1 RH |
862 | name = demand_copy_C_string (&dummy); |
863 | if (name == NULL) | |
252b5132 RH |
864 | { |
865 | ignore_rest_of_line (); | |
866 | return; | |
867 | } | |
868 | } | |
869 | else | |
870 | { | |
9de8d8f1 RH |
871 | end = input_line_pointer; |
872 | while (0 == strchr ("\n\t,; ", *end)) | |
873 | end++; | |
874 | if (end == input_line_pointer) | |
252b5132 RH |
875 | { |
876 | as_warn (_("Missing section name")); | |
877 | ignore_rest_of_line (); | |
878 | return; | |
879 | } | |
fa306131 | 880 | |
9de8d8f1 RH |
881 | name = xmalloc (end - input_line_pointer + 1); |
882 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
883 | name[end - input_line_pointer] = '\0'; | |
884 | input_line_pointer = end; | |
252b5132 | 885 | } |
252b5132 RH |
886 | SKIP_WHITESPACE (); |
887 | ||
888 | type = SHT_NULL; | |
889 | attr = 0; | |
f5fa8ca2 | 890 | entsize = 0; |
252b5132 RH |
891 | |
892 | if (*input_line_pointer == ',') | |
893 | { | |
894 | /* Skip the comma. */ | |
895 | ++input_line_pointer; | |
252b5132 RH |
896 | SKIP_WHITESPACE (); |
897 | ||
898 | if (*input_line_pointer == '"') | |
899 | { | |
9de8d8f1 RH |
900 | beg = demand_copy_C_string (&dummy); |
901 | if (beg == NULL) | |
252b5132 | 902 | { |
9de8d8f1 RH |
903 | ignore_rest_of_line (); |
904 | return; | |
252b5132 | 905 | } |
9de8d8f1 | 906 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
907 | |
908 | SKIP_WHITESPACE (); | |
909 | if (*input_line_pointer == ',') | |
910 | { | |
9de8d8f1 | 911 | char c; |
252b5132 RH |
912 | ++input_line_pointer; |
913 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
914 | c = *input_line_pointer; |
915 | if (c == '"') | |
252b5132 | 916 | { |
9de8d8f1 RH |
917 | beg = demand_copy_C_string (&dummy); |
918 | if (beg == NULL) | |
252b5132 | 919 | { |
9de8d8f1 RH |
920 | ignore_rest_of_line (); |
921 | return; | |
252b5132 | 922 | } |
9de8d8f1 | 923 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
924 | } |
925 | else if (c == '@' || c == '%') | |
926 | { | |
927 | beg = ++input_line_pointer; | |
928 | c = get_symbol_end (); | |
929 | *input_line_pointer = c; | |
930 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 RH |
931 | } |
932 | } | |
f5fa8ca2 JJ |
933 | |
934 | SKIP_WHITESPACE (); | |
935 | if ((attr & SHF_MERGE) && *input_line_pointer == ',') | |
936 | { | |
937 | ++input_line_pointer; | |
938 | SKIP_WHITESPACE (); | |
939 | entsize = get_absolute_expression (); | |
940 | if (entsize < 0) | |
941 | { | |
942 | as_warn (_("Bad .section directive - invalid merge entity size")); | |
943 | attr &= ~SHF_MERGE; | |
944 | entsize = 0; | |
945 | } | |
946 | } | |
252b5132 RH |
947 | } |
948 | else | |
949 | { | |
950 | do | |
951 | { | |
9de8d8f1 RH |
952 | char c; |
953 | ||
252b5132 RH |
954 | SKIP_WHITESPACE (); |
955 | if (*input_line_pointer != '#') | |
956 | { | |
957 | as_warn (_("Bad .section directive - character following name is not '#'")); | |
958 | ignore_rest_of_line (); | |
959 | return; | |
960 | } | |
9de8d8f1 RH |
961 | beg = ++input_line_pointer; |
962 | c = get_symbol_end (); | |
963 | *input_line_pointer = c; | |
964 | ||
965 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
966 | ||
252b5132 RH |
967 | SKIP_WHITESPACE (); |
968 | } | |
969 | while (*input_line_pointer++ == ','); | |
970 | --input_line_pointer; | |
971 | } | |
972 | } | |
973 | ||
252b5132 | 974 | demand_empty_rest_of_line (); |
9de8d8f1 | 975 | |
f5fa8ca2 JJ |
976 | if ((attr & SHF_MERGE) && entsize == 0) |
977 | { | |
978 | as_warn (_("Entity size for SHF_MERGE not specified.\nSpecify entity size as 4th argument")); | |
979 | attr &= SHF_MERGE; | |
980 | } | |
981 | ||
982 | obj_elf_change_section (name, type, attr, entsize, push); | |
252b5132 RH |
983 | } |
984 | ||
985 | /* Change to the .data section. */ | |
986 | ||
16b93d88 | 987 | void |
252b5132 RH |
988 | obj_elf_data (i) |
989 | int i; | |
990 | { | |
991 | #ifdef md_flush_pending_output | |
992 | md_flush_pending_output (); | |
993 | #endif | |
994 | ||
995 | previous_section = now_seg; | |
996 | previous_subsection = now_subseg; | |
997 | s_data (i); | |
998 | ||
999 | #ifdef md_elf_section_change_hook | |
1000 | md_elf_section_change_hook (); | |
1001 | #endif | |
1002 | } | |
1003 | ||
1004 | /* Change to the .text section. */ | |
1005 | ||
16b93d88 | 1006 | void |
252b5132 RH |
1007 | obj_elf_text (i) |
1008 | int i; | |
1009 | { | |
1010 | #ifdef md_flush_pending_output | |
1011 | md_flush_pending_output (); | |
1012 | #endif | |
1013 | ||
1014 | previous_section = now_seg; | |
1015 | previous_subsection = now_subseg; | |
1016 | s_text (i); | |
1017 | ||
1018 | #ifdef md_elf_section_change_hook | |
1019 | md_elf_section_change_hook (); | |
1020 | #endif | |
1021 | } | |
1022 | ||
1023 | static void | |
1024 | obj_elf_subsection (ignore) | |
ab9da554 | 1025 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1026 | { |
1027 | register int temp; | |
1028 | ||
1029 | #ifdef md_flush_pending_output | |
1030 | md_flush_pending_output (); | |
1031 | #endif | |
1032 | ||
1033 | previous_section = now_seg; | |
1034 | previous_subsection = now_subseg; | |
1035 | ||
1036 | temp = get_absolute_expression (); | |
1037 | subseg_set (now_seg, (subsegT) temp); | |
1038 | demand_empty_rest_of_line (); | |
1039 | ||
1040 | #ifdef md_elf_section_change_hook | |
1041 | md_elf_section_change_hook (); | |
1042 | #endif | |
1043 | } | |
1044 | ||
1045 | /* This can be called from the processor backends if they change | |
1046 | sections. */ | |
1047 | ||
1048 | void | |
1049 | obj_elf_section_change_hook () | |
1050 | { | |
1051 | previous_section = now_seg; | |
1052 | previous_subsection = now_subseg; | |
1053 | } | |
1054 | ||
1055 | void | |
1056 | obj_elf_previous (ignore) | |
ab9da554 | 1057 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1058 | { |
9de8d8f1 RH |
1059 | segT new_section; |
1060 | int new_subsection; | |
1061 | ||
252b5132 RH |
1062 | if (previous_section == 0) |
1063 | { | |
1064 | as_bad (_(".previous without corresponding .section; ignored")); | |
1065 | return; | |
1066 | } | |
1067 | ||
1068 | #ifdef md_flush_pending_output | |
1069 | md_flush_pending_output (); | |
1070 | #endif | |
1071 | ||
9de8d8f1 RH |
1072 | new_section = previous_section; |
1073 | new_subsection = previous_subsection; | |
1074 | previous_section = now_seg; | |
1075 | previous_subsection = now_subseg; | |
1076 | subseg_set (new_section, new_subsection); | |
1077 | ||
1078 | #ifdef md_elf_section_change_hook | |
1079 | md_elf_section_change_hook (); | |
1080 | #endif | |
1081 | } | |
1082 | ||
1083 | static void | |
1084 | obj_elf_popsection (xxx) | |
ab9da554 | 1085 | int xxx ATTRIBUTE_UNUSED; |
9de8d8f1 RH |
1086 | { |
1087 | struct section_stack *top = section_stack; | |
1088 | ||
1089 | if (top == NULL) | |
1090 | { | |
1091 | as_bad (_(".popsection without corresponding .pushsection; ignored")); | |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | #ifdef md_flush_pending_output | |
1096 | md_flush_pending_output (); | |
1097 | #endif | |
1098 | ||
1099 | section_stack = top->next; | |
1100 | previous_section = top->prev_seg; | |
1101 | previous_subsection = top->prev_subseg; | |
1102 | subseg_set (top->seg, top->subseg); | |
1103 | free (top); | |
252b5132 RH |
1104 | |
1105 | #ifdef md_elf_section_change_hook | |
1106 | md_elf_section_change_hook (); | |
1107 | #endif | |
1108 | } | |
1109 | ||
1110 | static void | |
1111 | obj_elf_line (ignore) | |
ab9da554 | 1112 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1113 | { |
1114 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1115 | delightful bug, so we are not being incompatible here. */ |
252b5132 RH |
1116 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); |
1117 | demand_empty_rest_of_line (); | |
1118 | } | |
1119 | ||
1120 | /* This handles the .symver pseudo-op, which is used to specify a | |
1121 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1122 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1123 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1124 | with the same value as the symbol NAME. */ | |
1125 | ||
1126 | static void | |
1127 | obj_elf_symver (ignore) | |
ab9da554 | 1128 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1129 | { |
1130 | char *name; | |
1131 | char c; | |
468cced8 | 1132 | char old_lexat; |
252b5132 RH |
1133 | symbolS *sym; |
1134 | ||
1135 | name = input_line_pointer; | |
1136 | c = get_symbol_end (); | |
1137 | ||
1138 | sym = symbol_find_or_make (name); | |
1139 | ||
1140 | *input_line_pointer = c; | |
1141 | ||
252b5132 RH |
1142 | SKIP_WHITESPACE (); |
1143 | if (*input_line_pointer != ',') | |
1144 | { | |
1145 | as_bad (_("expected comma after name in .symver")); | |
1146 | ignore_rest_of_line (); | |
1147 | return; | |
1148 | } | |
1149 | ||
1150 | ++input_line_pointer; | |
1151 | name = input_line_pointer; | |
468cced8 AM |
1152 | |
1153 | /* Temporarily include '@' in symbol names. */ | |
1154 | old_lexat = lex_type[(unsigned char) '@']; | |
1155 | lex_type[(unsigned char) '@'] |= LEX_NAME; | |
1156 | c = get_symbol_end (); | |
1157 | lex_type[(unsigned char) '@'] = old_lexat; | |
252b5132 | 1158 | |
339681c0 L |
1159 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1160 | { | |
1161 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1162 | |
339681c0 | 1163 | *input_line_pointer = c; |
252b5132 | 1164 | |
6f620856 L |
1165 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1166 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1167 | { |
1168 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1169 | symbol_get_obj (sym)->versioned_name, | |
1170 | S_GET_NAME (sym)); | |
1171 | ignore_rest_of_line (); | |
1172 | return; | |
1173 | } | |
1174 | } | |
1175 | else | |
252b5132 | 1176 | { |
339681c0 L |
1177 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1178 | { | |
1179 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1180 | name, symbol_get_obj (sym)->versioned_name, | |
1181 | S_GET_NAME (sym)); | |
1182 | ignore_rest_of_line (); | |
1183 | return; | |
1184 | } | |
1185 | ||
1186 | *input_line_pointer = c; | |
252b5132 RH |
1187 | } |
1188 | ||
1189 | demand_empty_rest_of_line (); | |
1190 | } | |
1191 | ||
1192 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1193 | to the linker the hierarchy in which a particular table resides. The | |
1194 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1195 | ||
904a31bf | 1196 | struct fix * |
252b5132 | 1197 | obj_elf_vtable_inherit (ignore) |
ab9da554 | 1198 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1199 | { |
1200 | char *cname, *pname; | |
1201 | symbolS *csym, *psym; | |
1202 | char c, bad = 0; | |
1203 | ||
1204 | if (*input_line_pointer == '#') | |
1205 | ++input_line_pointer; | |
1206 | ||
1207 | cname = input_line_pointer; | |
1208 | c = get_symbol_end (); | |
1209 | csym = symbol_find (cname); | |
1210 | ||
1211 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1212 | the same child symbol. Also, we can currently only do this if the | |
1213 | child symbol is already exists and is placed in a fragment. */ | |
1214 | ||
49309057 | 1215 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 RH |
1216 | { |
1217 | as_bad ("expected `%s' to have already been set for .vtable_inherit", | |
1218 | cname); | |
1219 | bad = 1; | |
1220 | } | |
1221 | ||
1222 | *input_line_pointer = c; | |
1223 | ||
1224 | SKIP_WHITESPACE (); | |
1225 | if (*input_line_pointer != ',') | |
1226 | { | |
1227 | as_bad ("expected comma after name in .vtable_inherit"); | |
1228 | ignore_rest_of_line (); | |
904a31bf | 1229 | return NULL; |
252b5132 RH |
1230 | } |
1231 | ||
1232 | ++input_line_pointer; | |
1233 | SKIP_WHITESPACE (); | |
1234 | ||
1235 | if (*input_line_pointer == '#') | |
1236 | ++input_line_pointer; | |
1237 | ||
1238 | if (input_line_pointer[0] == '0' | |
1239 | && (input_line_pointer[1] == '\0' | |
3882b010 | 1240 | || ISSPACE (input_line_pointer[1]))) |
252b5132 RH |
1241 | { |
1242 | psym = section_symbol (absolute_section); | |
1243 | ++input_line_pointer; | |
1244 | } | |
1245 | else | |
1246 | { | |
1247 | pname = input_line_pointer; | |
1248 | c = get_symbol_end (); | |
1249 | psym = symbol_find_or_make (pname); | |
1250 | *input_line_pointer = c; | |
1251 | } | |
1252 | ||
1253 | demand_empty_rest_of_line (); | |
1254 | ||
1255 | if (bad) | |
904a31bf | 1256 | return NULL; |
252b5132 | 1257 | |
49309057 | 1258 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1259 | return fix_new (symbol_get_frag (csym), |
1260 | symbol_get_value_expression (csym)->X_add_number, | |
1261 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1262 | } |
fa306131 | 1263 | |
252b5132 RH |
1264 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1265 | to the linker that a vtable slot was used. The syntax is | |
1266 | ".vtable_entry tablename, offset". */ | |
1267 | ||
904a31bf | 1268 | struct fix * |
252b5132 | 1269 | obj_elf_vtable_entry (ignore) |
ab9da554 | 1270 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1271 | { |
1272 | char *name; | |
1273 | symbolS *sym; | |
1274 | offsetT offset; | |
1275 | char c; | |
1276 | ||
1277 | if (*input_line_pointer == '#') | |
1278 | ++input_line_pointer; | |
1279 | ||
1280 | name = input_line_pointer; | |
1281 | c = get_symbol_end (); | |
1282 | sym = symbol_find_or_make (name); | |
1283 | *input_line_pointer = c; | |
1284 | ||
1285 | SKIP_WHITESPACE (); | |
1286 | if (*input_line_pointer != ',') | |
1287 | { | |
1288 | as_bad ("expected comma after name in .vtable_entry"); | |
1289 | ignore_rest_of_line (); | |
904a31bf | 1290 | return NULL; |
252b5132 RH |
1291 | } |
1292 | ||
1293 | ++input_line_pointer; | |
1294 | if (*input_line_pointer == '#') | |
1295 | ++input_line_pointer; | |
1296 | ||
1297 | offset = get_absolute_expression (); | |
1298 | ||
252b5132 | 1299 | demand_empty_rest_of_line (); |
904a31bf AM |
1300 | |
1301 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1302 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1303 | } |
1304 | ||
1305 | void | |
4c63da97 | 1306 | elf_obj_read_begin_hook () |
252b5132 RH |
1307 | { |
1308 | #ifdef NEED_ECOFF_DEBUG | |
1309 | if (ECOFF_DEBUGGING) | |
1310 | ecoff_read_begin_hook (); | |
1311 | #endif | |
1312 | } | |
1313 | ||
1314 | void | |
4c63da97 | 1315 | elf_obj_symbol_new_hook (symbolP) |
252b5132 RH |
1316 | symbolS *symbolP; |
1317 | { | |
49309057 ILT |
1318 | struct elf_obj_sy *sy_obj; |
1319 | ||
1320 | sy_obj = symbol_get_obj (symbolP); | |
1321 | sy_obj->size = NULL; | |
1322 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1323 | |
1324 | #ifdef NEED_ECOFF_DEBUG | |
1325 | if (ECOFF_DEBUGGING) | |
1326 | ecoff_symbol_new_hook (symbolP); | |
1327 | #endif | |
1328 | } | |
1329 | ||
8fd3e36b AM |
1330 | /* When setting one symbol equal to another, by default we probably |
1331 | want them to have the same "size", whatever it means in the current | |
1332 | context. */ | |
1333 | ||
1334 | void | |
1335 | elf_copy_symbol_attributes (dest, src) | |
1336 | symbolS *dest, *src; | |
1337 | { | |
1338 | struct elf_obj_sy *srcelf = symbol_get_obj (src); | |
1339 | struct elf_obj_sy *destelf = symbol_get_obj (dest); | |
1340 | if (srcelf->size) | |
1341 | { | |
1342 | if (destelf->size == NULL) | |
1343 | destelf->size = | |
1344 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1345 | *destelf->size = *srcelf->size; | |
1346 | } | |
1347 | else | |
1348 | { | |
1349 | if (destelf->size != NULL) | |
1350 | free (destelf->size); | |
1351 | destelf->size = NULL; | |
1352 | } | |
1353 | S_SET_SIZE (dest, S_GET_SIZE (src)); | |
1354 | S_SET_OTHER (dest, S_GET_OTHER (src)); | |
1355 | } | |
1356 | ||
252b5132 RH |
1357 | void |
1358 | obj_elf_version (ignore) | |
ab9da554 | 1359 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1360 | { |
1361 | char *name; | |
1362 | unsigned int c; | |
1363 | char ch; | |
1364 | char *p; | |
1365 | asection *seg = now_seg; | |
1366 | subsegT subseg = now_subseg; | |
1367 | Elf_Internal_Note i_note; | |
1368 | Elf_External_Note e_note; | |
1369 | asection *note_secp = (asection *) NULL; | |
1370 | int i, len; | |
1371 | ||
1372 | SKIP_WHITESPACE (); | |
1373 | if (*input_line_pointer == '\"') | |
1374 | { | |
bf514e21 | 1375 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1376 | name = input_line_pointer; |
1377 | ||
1378 | while (is_a_char (c = next_char_of_string ())) | |
1379 | ; | |
1380 | c = *input_line_pointer; | |
1381 | *input_line_pointer = '\0'; | |
1382 | *(input_line_pointer - 1) = '\0'; | |
1383 | *input_line_pointer = c; | |
1384 | ||
1385 | /* create the .note section */ | |
1386 | ||
1387 | note_secp = subseg_new (".note", 0); | |
1388 | bfd_set_section_flags (stdoutput, | |
1389 | note_secp, | |
1390 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1391 | ||
1392 | /* process the version string */ | |
1393 | ||
1394 | len = strlen (name); | |
1395 | ||
1396 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ | |
1397 | i_note.descsz = 0; /* no description */ | |
1398 | i_note.type = NT_VERSION; | |
1399 | p = frag_more (sizeof (e_note.namesz)); | |
1400 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1401 | p = frag_more (sizeof (e_note.descsz)); | |
1402 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1403 | p = frag_more (sizeof (e_note.type)); | |
1404 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1405 | ||
1406 | for (i = 0; i < len; i++) | |
1407 | { | |
1408 | ch = *(name + i); | |
1409 | { | |
1410 | FRAG_APPEND_1_CHAR (ch); | |
1411 | } | |
1412 | } | |
1413 | frag_align (2, 0, 0); | |
1414 | ||
1415 | subseg_set (seg, subseg); | |
1416 | } | |
1417 | else | |
1418 | { | |
1419 | as_bad (_("Expected quoted string")); | |
1420 | } | |
1421 | demand_empty_rest_of_line (); | |
1422 | } | |
1423 | ||
1424 | static void | |
1425 | obj_elf_size (ignore) | |
ab9da554 | 1426 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1427 | { |
1428 | char *name = input_line_pointer; | |
1429 | char c = get_symbol_end (); | |
1430 | char *p; | |
1431 | expressionS exp; | |
1432 | symbolS *sym; | |
1433 | ||
1434 | p = input_line_pointer; | |
1435 | *p = c; | |
1436 | SKIP_WHITESPACE (); | |
1437 | if (*input_line_pointer != ',') | |
1438 | { | |
1439 | *p = 0; | |
1440 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1441 | *p = c; | |
1442 | ignore_rest_of_line (); | |
1443 | return; | |
1444 | } | |
1445 | input_line_pointer++; | |
1446 | expression (&exp); | |
1447 | if (exp.X_op == O_absent) | |
1448 | { | |
1449 | as_bad (_("missing expression in .size directive")); | |
1450 | exp.X_op = O_constant; | |
1451 | exp.X_add_number = 0; | |
1452 | } | |
1453 | *p = 0; | |
1454 | sym = symbol_find_or_make (name); | |
1455 | *p = c; | |
1456 | if (exp.X_op == O_constant) | |
c538998c JJ |
1457 | { |
1458 | S_SET_SIZE (sym, exp.X_add_number); | |
1459 | if (symbol_get_obj (sym)->size) | |
1460 | { | |
1461 | xfree (symbol_get_obj (sym)->size); | |
1462 | symbol_get_obj (sym)->size = NULL; | |
1463 | } | |
1464 | } | |
252b5132 RH |
1465 | else |
1466 | { | |
49309057 ILT |
1467 | symbol_get_obj (sym)->size = |
1468 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1469 | *symbol_get_obj (sym)->size = exp; | |
252b5132 RH |
1470 | } |
1471 | demand_empty_rest_of_line (); | |
1472 | } | |
1473 | ||
1474 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1475 | There are five syntaxes: |
fa306131 | 1476 | |
252b5132 RH |
1477 | The first (used on Solaris) is |
1478 | .type SYM,#function | |
1479 | The second (used on UnixWare) is | |
1480 | .type SYM,@function | |
1481 | The third (reportedly to be used on Irix 6.0) is | |
1482 | .type SYM STT_FUNC | |
1483 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1484 | .type SYM,%function | |
aa8c34c3 JE |
1485 | The fifth (used on SVR4/860) is |
1486 | .type SYM,"function" | |
252b5132 RH |
1487 | */ |
1488 | ||
1489 | static void | |
1490 | obj_elf_type (ignore) | |
ab9da554 | 1491 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1492 | { |
1493 | char *name; | |
1494 | char c; | |
1495 | int type; | |
1496 | const char *typename; | |
1497 | symbolS *sym; | |
904a31bf | 1498 | elf_symbol_type *elfsym; |
252b5132 RH |
1499 | |
1500 | name = input_line_pointer; | |
1501 | c = get_symbol_end (); | |
1502 | sym = symbol_find_or_make (name); | |
904a31bf | 1503 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1504 | *input_line_pointer = c; |
1505 | ||
1506 | SKIP_WHITESPACE (); | |
1507 | if (*input_line_pointer == ',') | |
1508 | ++input_line_pointer; | |
1509 | ||
1510 | SKIP_WHITESPACE (); | |
1511 | if ( *input_line_pointer == '#' | |
1512 | || *input_line_pointer == '@' | |
aa8c34c3 | 1513 | || *input_line_pointer == '"' |
252b5132 RH |
1514 | || *input_line_pointer == '%') |
1515 | ++input_line_pointer; | |
1516 | ||
1517 | typename = input_line_pointer; | |
1518 | c = get_symbol_end (); | |
1519 | ||
1520 | type = 0; | |
1521 | if (strcmp (typename, "function") == 0 | |
1522 | || strcmp (typename, "STT_FUNC") == 0) | |
1523 | type = BSF_FUNCTION; | |
1524 | else if (strcmp (typename, "object") == 0 | |
1525 | || strcmp (typename, "STT_OBJECT") == 0) | |
1526 | type = BSF_OBJECT; | |
904a31bf AM |
1527 | #ifdef md_elf_symbol_type |
1528 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1529 | ; | |
1530 | #endif | |
252b5132 RH |
1531 | else |
1532 | as_bad (_("ignoring unrecognized symbol type \"%s\""), typename); | |
1533 | ||
1534 | *input_line_pointer = c; | |
1535 | ||
aa8c34c3 JE |
1536 | if (*input_line_pointer == '"') |
1537 | ++input_line_pointer; | |
1538 | ||
904a31bf | 1539 | elfsym->symbol.flags |= type; |
252b5132 RH |
1540 | |
1541 | demand_empty_rest_of_line (); | |
1542 | } | |
1543 | ||
1544 | static void | |
1545 | obj_elf_ident (ignore) | |
ab9da554 | 1546 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1547 | { |
1548 | static segT comment_section; | |
1549 | segT old_section = now_seg; | |
1550 | int old_subsection = now_subseg; | |
1551 | ||
5f91fe03 ILT |
1552 | #ifdef md_flush_pending_output |
1553 | md_flush_pending_output (); | |
1554 | #endif | |
1555 | ||
252b5132 RH |
1556 | if (!comment_section) |
1557 | { | |
1558 | char *p; | |
1559 | comment_section = subseg_new (".comment", 0); | |
1560 | bfd_set_section_flags (stdoutput, comment_section, | |
1561 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1562 | p = frag_more (1); | |
1563 | *p = 0; | |
1564 | } | |
1565 | else | |
1566 | subseg_set (comment_section, 0); | |
1567 | stringer (1); | |
1568 | subseg_set (old_section, old_subsection); | |
1569 | } | |
1570 | ||
1571 | #ifdef INIT_STAB_SECTION | |
1572 | ||
1573 | /* The first entry in a .stabs section is special. */ | |
1574 | ||
1575 | void | |
1576 | obj_elf_init_stab_section (seg) | |
1577 | segT seg; | |
1578 | { | |
1579 | char *file; | |
1580 | char *p; | |
1581 | char *stabstr_name; | |
1582 | unsigned int stroff; | |
1583 | ||
1584 | /* Force the section to align to a longword boundary. Without this, | |
1585 | UnixWare ar crashes. */ | |
1586 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1587 | ||
bf514e21 | 1588 | /* Make space for this first symbol. */ |
252b5132 | 1589 | p = frag_more (12); |
bf514e21 | 1590 | /* Zero it out. */ |
252b5132 RH |
1591 | memset (p, 0, 12); |
1592 | as_where (&file, (unsigned int *) NULL); | |
1593 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); | |
1594 | strcpy (stabstr_name, segment_name (seg)); | |
1595 | strcat (stabstr_name, "str"); | |
1596 | stroff = get_stab_string_offset (file, stabstr_name); | |
1597 | know (stroff == 1); | |
1598 | md_number_to_chars (p, stroff, 4); | |
1599 | seg_info (seg)->stabu.p = p; | |
1600 | } | |
1601 | ||
1602 | #endif | |
1603 | ||
1604 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1605 | ||
1606 | static void | |
1607 | adjust_stab_sections (abfd, sec, xxx) | |
1608 | bfd *abfd; | |
1609 | asection *sec; | |
ab9da554 | 1610 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1611 | { |
1612 | char *name; | |
1613 | asection *strsec; | |
1614 | char *p; | |
1615 | int strsz, nsyms; | |
1616 | ||
1617 | if (strncmp (".stab", sec->name, 5)) | |
1618 | return; | |
1619 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1620 | return; | |
1621 | ||
1622 | name = (char *) alloca (strlen (sec->name) + 4); | |
1623 | strcpy (name, sec->name); | |
1624 | strcat (name, "str"); | |
1625 | strsec = bfd_get_section_by_name (abfd, name); | |
1626 | if (strsec) | |
1627 | strsz = bfd_section_size (abfd, strsec); | |
1628 | else | |
1629 | strsz = 0; | |
1630 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1631 | ||
1632 | p = seg_info (sec)->stabu.p; | |
1633 | assert (p != 0); | |
1634 | ||
1635 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); | |
1636 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
1637 | } | |
1638 | ||
1639 | #ifdef NEED_ECOFF_DEBUG | |
1640 | ||
1641 | /* This function is called by the ECOFF code. It is supposed to | |
1642 | record the external symbol information so that the backend can | |
1643 | write it out correctly. The ELF backend doesn't actually handle | |
1644 | this at the moment, so we do it ourselves. We save the information | |
1645 | in the symbol. */ | |
1646 | ||
1647 | void | |
1648 | elf_ecoff_set_ext (sym, ext) | |
1649 | symbolS *sym; | |
1650 | struct ecoff_extr *ext; | |
1651 | { | |
49309057 | 1652 | symbol_get_bfdsym (sym)->udata.p = (PTR) ext; |
252b5132 RH |
1653 | } |
1654 | ||
1655 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1656 | supposed to *EXT to the external symbol information, and return | |
1657 | whether the symbol should be used at all. */ | |
1658 | ||
1659 | static boolean | |
1660 | elf_get_extr (sym, ext) | |
1661 | asymbol *sym; | |
1662 | EXTR *ext; | |
1663 | { | |
1664 | if (sym->udata.p == NULL) | |
1665 | return false; | |
1666 | *ext = *(EXTR *) sym->udata.p; | |
1667 | return true; | |
1668 | } | |
1669 | ||
1670 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1671 | nothing to do for ELF. */ | |
1672 | ||
1673 | /*ARGSUSED*/ | |
1674 | static void | |
1675 | elf_set_index (sym, indx) | |
5f91fe03 ILT |
1676 | asymbol *sym ATTRIBUTE_UNUSED; |
1677 | bfd_size_type indx ATTRIBUTE_UNUSED; | |
252b5132 RH |
1678 | { |
1679 | } | |
1680 | ||
1681 | #endif /* NEED_ECOFF_DEBUG */ | |
1682 | ||
1683 | void | |
1684 | elf_frob_symbol (symp, puntp) | |
1685 | symbolS *symp; | |
1686 | int *puntp; | |
1687 | { | |
49309057 ILT |
1688 | struct elf_obj_sy *sy_obj; |
1689 | ||
252b5132 RH |
1690 | #ifdef NEED_ECOFF_DEBUG |
1691 | if (ECOFF_DEBUGGING) | |
1692 | ecoff_frob_symbol (symp); | |
1693 | #endif | |
1694 | ||
49309057 ILT |
1695 | sy_obj = symbol_get_obj (symp); |
1696 | ||
1697 | if (sy_obj->size != NULL) | |
252b5132 | 1698 | { |
49309057 | 1699 | switch (sy_obj->size->X_op) |
252b5132 RH |
1700 | { |
1701 | case O_subtract: | |
1702 | S_SET_SIZE (symp, | |
49309057 ILT |
1703 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1704 | + sy_obj->size->X_add_number | |
1705 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1706 | break; |
1707 | case O_constant: | |
1708 | S_SET_SIZE (symp, | |
49309057 ILT |
1709 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1710 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1711 | break; |
1712 | default: | |
1713 | as_bad (_(".size expression too complicated to fix up")); | |
1714 | break; | |
1715 | } | |
49309057 ILT |
1716 | free (sy_obj->size); |
1717 | sy_obj->size = NULL; | |
252b5132 RH |
1718 | } |
1719 | ||
49309057 | 1720 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1721 | { |
79082ff0 L |
1722 | char *p; |
1723 | ||
1724 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1725 | know (p != NULL); | |
1726 | ||
252b5132 RH |
1727 | /* This symbol was given a new name with the .symver directive. |
1728 | ||
1729 | If this is an external reference, just rename the symbol to | |
1730 | include the version string. This will make the relocs be | |
1731 | against the correct versioned symbol. | |
1732 | ||
1733 | If this is a definition, add an alias. FIXME: Using an alias | |
1734 | will permit the debugging information to refer to the right | |
1735 | symbol. However, it's not clear whether it is the best | |
1736 | approach. */ | |
1737 | ||
1738 | if (! S_IS_DEFINED (symp)) | |
1739 | { | |
252b5132 RH |
1740 | /* Verify that the name isn't using the @@ syntax--this is |
1741 | reserved for definitions of the default version to link | |
1742 | against. */ | |
252b5132 RH |
1743 | if (p[1] == ELF_VER_CHR) |
1744 | { | |
1745 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1746 | sy_obj->versioned_name); |
252b5132 RH |
1747 | *puntp = true; |
1748 | } | |
49309057 | 1749 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1750 | } |
1751 | else | |
1752 | { | |
79082ff0 L |
1753 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) |
1754 | { | |
1755 | size_t l; | |
1756 | ||
1757 | /* The @@@ syntax is a special case. It renames the | |
1758 | symbol name to versioned_name with one `@' removed. */ | |
1759 | l = strlen (&p[3]) + 1; | |
1760 | memmove (&p [2], &p[3], l); | |
1761 | S_SET_NAME (symp, sy_obj->versioned_name); | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | symbolS *symp2; | |
252b5132 | 1766 | |
79082ff0 L |
1767 | /* FIXME: Creating a new symbol here is risky. We're |
1768 | in the final loop over the symbol table. We can | |
1769 | get away with it only because the symbol goes to | |
1770 | the end of the list, where the loop will still see | |
1771 | it. It would probably be better to do this in | |
1772 | obj_frob_file_before_adjust. */ | |
252b5132 | 1773 | |
79082ff0 | 1774 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1775 | |
79082ff0 | 1776 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1777 | |
79082ff0 | 1778 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1779 | |
79082ff0 L |
1780 | /* Subtracting out the frag address here is a hack |
1781 | because we are in the middle of the final loop. */ | |
1782 | S_SET_VALUE (symp2, | |
1783 | (S_GET_VALUE (symp) | |
1784 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1785 | |
79082ff0 | 1786 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1787 | |
79082ff0 L |
1788 | /* This will copy over the size information. */ |
1789 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1790 | |
79082ff0 L |
1791 | if (S_IS_WEAK (symp)) |
1792 | S_SET_WEAK (symp2); | |
252b5132 | 1793 | |
79082ff0 L |
1794 | if (S_IS_EXTERNAL (symp)) |
1795 | S_SET_EXTERNAL (symp2); | |
1796 | } | |
252b5132 RH |
1797 | } |
1798 | } | |
1799 | ||
1800 | /* Double check weak symbols. */ | |
49309057 | 1801 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1802 | { |
1803 | if (S_IS_COMMON (symp)) | |
1804 | as_bad (_("Symbol `%s' can not be both weak and common"), | |
1805 | S_GET_NAME (symp)); | |
1806 | } | |
1807 | ||
1808 | #ifdef TC_MIPS | |
1809 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1810 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1811 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1812 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1813 | because that is the only time gcc will generate the necessary | |
1814 | .global directives to mark functions. */ | |
1815 | ||
1816 | if (S_IS_COMMON (symp)) | |
49309057 | 1817 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1818 | |
1819 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1820 | && ! S_IS_DEFINED (symp) |
1821 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1822 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 RH |
1823 | #endif |
1824 | ||
c5e54cc2 ILT |
1825 | #if 0 /* TC_PPC */ |
1826 | /* If TC_PPC is defined, we used to force the type of a symbol to be | |
1827 | BSF_OBJECT if it was otherwise unset. This was required by some | |
1828 | version of VxWorks. Thomas de Lellis <tdel@windriver.com> says | |
1829 | that this is no longer needed, so it is now commented out. */ | |
49309057 ILT |
1830 | if ((symbol_get_bfdsym (symp)->flags |
1831 | & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 | |
252b5132 | 1832 | && S_IS_DEFINED (symp)) |
49309057 | 1833 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1834 | #endif |
1835 | } | |
1836 | ||
1837 | void | |
1838 | elf_frob_file () | |
1839 | { | |
1840 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); | |
1841 | ||
1842 | #ifdef elf_tc_final_processing | |
1843 | elf_tc_final_processing (); | |
1844 | #endif | |
1845 | } | |
1846 | ||
4a1805b1 | 1847 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
1848 | |
1849 | void | |
1850 | elf_frob_file_before_adjust () | |
1851 | { | |
1852 | if (symbol_rootP) | |
1853 | { | |
1854 | symbolS *symp; | |
1855 | ||
1856 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
79082ff0 L |
1857 | if (symbol_get_obj (symp)->versioned_name) |
1858 | { | |
1859 | if (!S_IS_DEFINED (symp)) | |
1860 | { | |
1861 | char *p; | |
1862 | ||
1863 | /* The @@@ syntax is a special case. If the symbol is | |
1864 | not defined, 2 `@'s will be removed from the | |
1865 | versioned_name. */ | |
1866 | ||
1867 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
1868 | ELF_VER_CHR); | |
1869 | know (p != NULL); | |
1870 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) | |
1871 | { | |
1872 | size_t l = strlen (&p[3]) + 1; | |
1873 | memmove (&p [1], &p[3], l); | |
1874 | } | |
1875 | if (symbol_used_p (symp) == 0 | |
1876 | && symbol_used_in_reloc_p (symp) == 0) | |
1877 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1878 | } | |
1879 | } | |
339681c0 L |
1880 | } |
1881 | } | |
1882 | ||
252b5132 RH |
1883 | /* It is required that we let write_relocs have the opportunity to |
1884 | optimize away fixups before output has begun, since it is possible | |
1885 | to eliminate all fixups for a section and thus we never should | |
1886 | have generated the relocation section. */ | |
1887 | ||
1888 | void | |
1889 | elf_frob_file_after_relocs () | |
1890 | { | |
1891 | #ifdef NEED_ECOFF_DEBUG | |
1892 | if (ECOFF_DEBUGGING) | |
1893 | /* Generate the ECOFF debugging information. */ | |
1894 | { | |
1895 | const struct ecoff_debug_swap *debug_swap; | |
1896 | struct ecoff_debug_info debug; | |
1897 | char *buf; | |
1898 | asection *sec; | |
1899 | ||
1900 | debug_swap | |
1901 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1902 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1903 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1904 | ||
1905 | /* Set up the pointers in debug. */ | |
1906 | #define SET(ptr, offset, type) \ | |
1907 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1908 | ||
1909 | SET (line, cbLineOffset, unsigned char *); | |
1910 | SET (external_dnr, cbDnOffset, PTR); | |
1911 | SET (external_pdr, cbPdOffset, PTR); | |
1912 | SET (external_sym, cbSymOffset, PTR); | |
1913 | SET (external_opt, cbOptOffset, PTR); | |
1914 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1915 | SET (ss, cbSsOffset, char *); | |
1916 | SET (external_fdr, cbFdOffset, PTR); | |
1917 | SET (external_rfd, cbRfdOffset, PTR); | |
1918 | /* ssext and external_ext are set up just below. */ | |
1919 | ||
1920 | #undef SET | |
1921 | ||
1922 | /* Set up the external symbols. */ | |
1923 | debug.ssext = debug.ssext_end = NULL; | |
1924 | debug.external_ext = debug.external_ext_end = NULL; | |
1925 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1926 | elf_get_extr, elf_set_index)) | |
1927 | as_fatal (_("Failed to set up debugging information: %s"), | |
1928 | bfd_errmsg (bfd_get_error ())); | |
1929 | ||
1930 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1931 | assert (sec != NULL); | |
1932 | ||
1933 | know (stdoutput->output_has_begun == false); | |
1934 | ||
1935 | /* We set the size of the section, call bfd_set_section_contents | |
1936 | to force the ELF backend to allocate a file position, and then | |
1937 | write out the data. FIXME: Is this really the best way to do | |
1938 | this? */ | |
1939 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1940 | ||
5f91fe03 ILT |
1941 | /* Pass BUF to bfd_set_section_contents because this will |
1942 | eventually become a call to fwrite, and ISO C prohibits | |
1943 | passing a NULL pointer to a stdio function even if the | |
1944 | pointer will not be used. */ | |
1945 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf, | |
252b5132 RH |
1946 | (file_ptr) 0, (bfd_size_type) 0)) |
1947 | as_fatal (_("Can't start writing .mdebug section: %s"), | |
1948 | bfd_errmsg (bfd_get_error ())); | |
1949 | ||
1950 | know (stdoutput->output_has_begun == true); | |
1951 | know (sec->filepos != 0); | |
1952 | ||
1953 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1954 | sec->filepos)) | |
1955 | as_fatal (_("Could not write .mdebug section: %s"), | |
1956 | bfd_errmsg (bfd_get_error ())); | |
1957 | } | |
1958 | #endif /* NEED_ECOFF_DEBUG */ | |
1959 | } | |
1960 | ||
1961 | #ifdef SCO_ELF | |
1962 | ||
1963 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1964 | SCO specific identifier in the .notes section to satisfy the SCO | |
1965 | linker. | |
1966 | ||
1967 | This looks more complicated than it really is. As opposed to the | |
1968 | "obvious" solution, this should handle the cross dev cases | |
1969 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1970 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1971 | should be exactly one of these sections per object module. | |
1972 | ||
1973 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
1974 | .note section. | |
1975 | ||
fa306131 AM |
1976 | int_32 namesz = 4 ; Name size |
1977 | int_32 descsz = 12 ; Descriptive information | |
1978 | int_32 type = 1 ; | |
1979 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
1980 | int_32 version = (major ver # << 16) | version of tools ; |
1981 | int_32 source = (tool_id << 16 ) | 1 ; | |
1982 | int_32 info = 0 ; These are set by the SCO tools, but we | |
fa306131 | 1983 | don't know enough about the source |
252b5132 RH |
1984 | environment to set them. SCO ld currently |
1985 | ignores them, and recommends we set them | |
1986 | to zero. */ | |
1987 | ||
1988 | #define SCO_MAJOR_VERSION 0x1 | |
1989 | #define SCO_MINOR_VERSION 0x1 | |
1990 | ||
1991 | void | |
1992 | sco_id () | |
1993 | { | |
1994 | ||
1995 | char *name; | |
1996 | unsigned int c; | |
1997 | char ch; | |
1998 | char *p; | |
1999 | asection *seg = now_seg; | |
2000 | subsegT subseg = now_subseg; | |
2001 | Elf_Internal_Note i_note; | |
2002 | Elf_External_Note e_note; | |
2003 | asection *note_secp = (asection *) NULL; | |
2004 | int i, len; | |
2005 | ||
2006 | /* create the .note section */ | |
2007 | ||
2008 | note_secp = subseg_new (".note", 0); | |
2009 | bfd_set_section_flags (stdoutput, | |
2010 | note_secp, | |
2011 | SEC_HAS_CONTENTS | SEC_READONLY); | |
2012 | ||
2013 | /* process the version string */ | |
2014 | ||
fa306131 | 2015 | i_note.namesz = 4; |
252b5132 RH |
2016 | i_note.descsz = 12; /* 12 descriptive bytes */ |
2017 | i_note.type = NT_VERSION; /* Contains a version string */ | |
2018 | ||
2019 | p = frag_more (sizeof (i_note.namesz)); | |
2020 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
2021 | ||
2022 | p = frag_more (sizeof (i_note.descsz)); | |
2023 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
2024 | ||
2025 | p = frag_more (sizeof (i_note.type)); | |
2026 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
2027 | ||
2028 | p = frag_more (4); | |
fa306131 | 2029 | strcpy (p, "SCO"); |
252b5132 RH |
2030 | |
2031 | /* Note: this is the version number of the ELF we're representing */ | |
2032 | p = frag_more (4); | |
2033 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2034 | ||
2035 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2036 | it with SCO. The bottom bit shows that we are compat with the | |
2037 | SCO ABI. */ | |
2038 | p = frag_more (4); | |
2039 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2040 | ||
2041 | /* If we knew (or cared) what the source language options were, we'd | |
2042 | fill them in here. SCO has given us permission to ignore these | |
2043 | and just set them to zero. */ | |
2044 | p = frag_more (4); | |
2045 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2046 | |
252b5132 RH |
2047 | frag_align (2, 0, 0); |
2048 | ||
2049 | /* We probably can't restore the current segment, for there likely | |
2050 | isn't one yet... */ | |
2051 | if (seg && subseg) | |
2052 | subseg_set (seg, subseg); | |
2053 | ||
2054 | } | |
2055 | ||
2056 | #endif /* SCO_ELF */ | |
2057 | ||
5110c57e HPN |
2058 | static int |
2059 | elf_separate_stab_sections () | |
2060 | { | |
2061 | #ifdef NEED_ECOFF_DEBUG | |
2062 | return (!ECOFF_DEBUGGING); | |
2063 | #else | |
2064 | return 1; | |
2065 | #endif | |
2066 | } | |
2067 | ||
2068 | static void | |
2069 | elf_init_stab_section (seg) | |
2070 | segT seg; | |
2071 | { | |
2072 | #ifdef NEED_ECOFF_DEBUG | |
2073 | if (!ECOFF_DEBUGGING) | |
2074 | #endif | |
2075 | obj_elf_init_stab_section (seg); | |
2076 | } | |
2077 | ||
252b5132 RH |
2078 | const struct format_ops elf_format_ops = |
2079 | { | |
2080 | bfd_target_elf_flavour, | |
4c63da97 AM |
2081 | 0, /* dfl_leading_underscore */ |
2082 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2083 | elf_begin, |
2084 | elf_file_symbol, | |
252b5132 RH |
2085 | elf_frob_symbol, |
2086 | elf_frob_file, | |
339681c0 | 2087 | elf_frob_file_before_adjust, |
252b5132 RH |
2088 | elf_frob_file_after_relocs, |
2089 | elf_s_get_size, elf_s_set_size, | |
2090 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2091 | elf_s_get_other, |
5110c57e | 2092 | elf_s_set_other, |
4c63da97 | 2093 | 0, /* s_get_desc */ |
5110c57e HPN |
2094 | 0, /* s_set_desc */ |
2095 | 0, /* s_get_type */ | |
2096 | 0, /* s_set_type */ | |
252b5132 RH |
2097 | elf_copy_symbol_attributes, |
2098 | #ifdef NEED_ECOFF_DEBUG | |
2099 | ecoff_generate_asm_lineno, | |
2100 | ecoff_stab, | |
2101 | #else | |
4c63da97 AM |
2102 | 0, /* generate_asm_lineno */ |
2103 | 0, /* process_stab */ | |
252b5132 | 2104 | #endif |
5110c57e HPN |
2105 | elf_separate_stab_sections, |
2106 | elf_init_stab_section, | |
252b5132 RH |
2107 | elf_sec_sym_ok_for_reloc, |
2108 | elf_pop_insert, | |
2109 | #ifdef NEED_ECOFF_DEBUG | |
2110 | elf_ecoff_set_ext, | |
2111 | #else | |
4c63da97 | 2112 | 0, /* ecoff_set_ext */ |
252b5132 | 2113 | #endif |
4c63da97 | 2114 | elf_obj_read_begin_hook, |
5110c57e | 2115 | elf_obj_symbol_new_hook |
252b5132 | 2116 | }; |