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)); | |
6ce8b369 | 80 | static char *obj_elf_section_name PARAMS ((void)); |
8d28c9d7 | 81 | static int obj_elf_section_type PARAMS ((char *, size_t)); |
252b5132 | 82 | static void obj_elf_symver PARAMS ((int)); |
252b5132 | 83 | static void obj_elf_subsection PARAMS ((int)); |
9de8d8f1 | 84 | static void obj_elf_popsection PARAMS ((int)); |
252b5132 RH |
85 | |
86 | static const pseudo_typeS elf_pseudo_table[] = | |
87 | { | |
88 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 89 | {"common", obj_elf_common, 1}, |
252b5132 RH |
90 | {"ident", obj_elf_ident, 0}, |
91 | {"local", obj_elf_local, 0}, | |
92 | {"previous", obj_elf_previous, 0}, | |
93 | {"section", obj_elf_section, 0}, | |
94 | {"section.s", obj_elf_section, 0}, | |
95 | {"sect", obj_elf_section, 0}, | |
96 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
97 | {"pushsection", obj_elf_section, 1}, |
98 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
99 | {"size", obj_elf_size, 0}, |
100 | {"type", obj_elf_type, 0}, | |
101 | {"version", obj_elf_version, 0}, | |
102 | {"weak", obj_elf_weak, 0}, | |
103 | ||
bf514e21 | 104 | /* These define symbol visibility. */ |
2e13b764 NC |
105 | {"internal", obj_elf_visibility, STV_INTERNAL}, |
106 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
107 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
108 | ||
252b5132 RH |
109 | /* These are used for stabs-in-elf configurations. */ |
110 | {"line", obj_elf_line, 0}, | |
111 | ||
112 | /* This is a GNU extension to handle symbol versions. */ | |
113 | {"symver", obj_elf_symver, 0}, | |
114 | ||
115 | /* A GNU extension to change subsection only. */ | |
116 | {"subsection", obj_elf_subsection, 0}, | |
117 | ||
118 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
904a31bf AM |
119 | {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0}, |
120 | {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0}, | |
252b5132 | 121 | |
bf514e21 | 122 | /* These are used for dwarf. */ |
252b5132 RH |
123 | {"2byte", cons, 2}, |
124 | {"4byte", cons, 4}, | |
125 | {"8byte", cons, 8}, | |
126 | ||
127 | /* We need to trap the section changing calls to handle .previous. */ | |
128 | {"data", obj_elf_data, 0}, | |
129 | {"text", obj_elf_text, 0}, | |
130 | ||
131 | /* End sentinel. */ | |
ab9da554 | 132 | {NULL, NULL, 0}, |
252b5132 RH |
133 | }; |
134 | ||
135 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
136 | { | |
137 | #ifdef NEED_ECOFF_DEBUG | |
138 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
139 | is used instead. */ | |
140 | { "def", ecoff_directive_def, 0 }, | |
141 | { "dim", ecoff_directive_dim, 0 }, | |
142 | { "endef", ecoff_directive_endef, 0 }, | |
143 | { "file", ecoff_directive_file, 0 }, | |
144 | { "scl", ecoff_directive_scl, 0 }, | |
145 | { "tag", ecoff_directive_tag, 0 }, | |
146 | { "val", ecoff_directive_val, 0 }, | |
147 | ||
148 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
149 | already has meanings for those. We use .esize and .etype | |
150 | instead. These are only generated by gcc anyhow. */ | |
151 | { "esize", ecoff_directive_size, 0 }, | |
152 | { "etype", ecoff_directive_type, 0 }, | |
153 | ||
154 | /* ECOFF specific debugging information. */ | |
155 | { "begin", ecoff_directive_begin, 0 }, | |
156 | { "bend", ecoff_directive_bend, 0 }, | |
157 | { "end", ecoff_directive_end, 0 }, | |
158 | { "ent", ecoff_directive_ent, 0 }, | |
159 | { "fmask", ecoff_directive_fmask, 0 }, | |
160 | { "frame", ecoff_directive_frame, 0 }, | |
161 | { "loc", ecoff_directive_loc, 0 }, | |
162 | { "mask", ecoff_directive_mask, 0 }, | |
163 | ||
164 | /* Other ECOFF directives. */ | |
165 | { "extern", ecoff_directive_extern, 0 }, | |
166 | ||
167 | /* These are used on Irix. I don't know how to implement them. */ | |
168 | { "alias", s_ignore, 0 }, | |
169 | { "bgnb", s_ignore, 0 }, | |
170 | { "endb", s_ignore, 0 }, | |
171 | { "lab", s_ignore, 0 }, | |
172 | { "noalias", s_ignore, 0 }, | |
173 | { "verstamp", s_ignore, 0 }, | |
174 | { "vreg", s_ignore, 0 }, | |
175 | #endif | |
176 | ||
ab9da554 | 177 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
178 | }; |
179 | ||
180 | #undef NO_RELOC | |
181 | #include "aout/aout64.h" | |
182 | ||
183 | /* This is called when the assembler starts. */ | |
184 | ||
185 | void | |
186 | elf_begin () | |
187 | { | |
188 | /* Add symbols for the known sections to the symbol table. */ | |
189 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
190 | TEXT_SECTION_NAME))); | |
191 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
192 | DATA_SECTION_NAME))); | |
193 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
194 | BSS_SECTION_NAME))); | |
195 | } | |
196 | ||
197 | void | |
198 | elf_pop_insert () | |
199 | { | |
200 | pop_insert (elf_pseudo_table); | |
201 | if (ECOFF_DEBUGGING) | |
202 | pop_insert (ecoff_debug_pseudo_table); | |
203 | } | |
204 | ||
205 | static bfd_vma | |
206 | elf_s_get_size (sym) | |
207 | symbolS *sym; | |
208 | { | |
209 | return S_GET_SIZE (sym); | |
210 | } | |
211 | ||
212 | static void | |
213 | elf_s_set_size (sym, sz) | |
214 | symbolS *sym; | |
215 | bfd_vma sz; | |
216 | { | |
217 | S_SET_SIZE (sym, sz); | |
218 | } | |
219 | ||
220 | static bfd_vma | |
221 | elf_s_get_align (sym) | |
222 | symbolS *sym; | |
223 | { | |
224 | return S_GET_ALIGN (sym); | |
225 | } | |
226 | ||
227 | static void | |
228 | elf_s_set_align (sym, align) | |
229 | symbolS *sym; | |
230 | bfd_vma align; | |
231 | { | |
232 | S_SET_ALIGN (sym, align); | |
233 | } | |
234 | ||
4c63da97 AM |
235 | int |
236 | elf_s_get_other (sym) | |
237 | symbolS *sym; | |
238 | { | |
239 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
240 | } | |
241 | ||
5110c57e HPN |
242 | static void |
243 | elf_s_set_other (sym, other) | |
244 | symbolS *sym; | |
245 | int other; | |
246 | { | |
247 | S_SET_OTHER (sym, other); | |
248 | } | |
249 | ||
252b5132 RH |
250 | static int |
251 | elf_sec_sym_ok_for_reloc (sec) | |
252 | asection *sec; | |
253 | { | |
254 | return obj_sec_sym_ok_for_reloc (sec); | |
255 | } | |
256 | ||
257 | void | |
258 | elf_file_symbol (s) | |
5110c57e | 259 | const char *s; |
252b5132 RH |
260 | { |
261 | symbolS *sym; | |
262 | ||
263 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
49309057 ILT |
264 | symbol_set_frag (sym, &zero_address_frag); |
265 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 RH |
266 | |
267 | if (symbol_rootP != sym) | |
268 | { | |
269 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
270 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
271 | #ifdef DEBUG | |
272 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
273 | #endif | |
274 | } | |
275 | ||
276 | #ifdef NEED_ECOFF_DEBUG | |
277 | ecoff_new_file (s); | |
278 | #endif | |
279 | } | |
280 | ||
16b93d88 | 281 | void |
9be1cda6 AS |
282 | obj_elf_common (is_common) |
283 | int is_common; | |
252b5132 RH |
284 | { |
285 | char *name; | |
286 | char c; | |
287 | char *p; | |
288 | int temp, size; | |
289 | symbolS *symbolP; | |
290 | int have_align; | |
291 | ||
9be1cda6 AS |
292 | if (flag_mri && is_common) |
293 | { | |
294 | s_mri_common (0); | |
295 | return; | |
296 | } | |
297 | ||
252b5132 RH |
298 | name = input_line_pointer; |
299 | c = get_symbol_end (); | |
300 | /* just after name is now '\0' */ | |
301 | p = input_line_pointer; | |
302 | *p = c; | |
303 | SKIP_WHITESPACE (); | |
304 | if (*input_line_pointer != ',') | |
305 | { | |
6ce8b369 | 306 | as_bad (_("expected comma after symbol-name")); |
252b5132 RH |
307 | ignore_rest_of_line (); |
308 | return; | |
309 | } | |
310 | input_line_pointer++; /* skip ',' */ | |
311 | if ((temp = get_absolute_expression ()) < 0) | |
312 | { | |
313 | as_bad (_(".COMMon length (%d.) <0! Ignored."), temp); | |
314 | ignore_rest_of_line (); | |
315 | return; | |
316 | } | |
317 | size = temp; | |
318 | *p = 0; | |
319 | symbolP = symbol_find_or_make (name); | |
320 | *p = c; | |
321 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
322 | { | |
6ce8b369 | 323 | as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP)); |
252b5132 RH |
324 | ignore_rest_of_line (); |
325 | return; | |
326 | } | |
327 | if (S_GET_VALUE (symbolP) != 0) | |
328 | { | |
ab9da554 | 329 | if (S_GET_VALUE (symbolP) != (valueT) size) |
252b5132 | 330 | { |
6ce8b369 | 331 | as_warn (_("length of .comm \"%s\" is already %ld; not changed to %d"), |
252b5132 RH |
332 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); |
333 | } | |
334 | } | |
335 | know (symbolP->sy_frag == &zero_address_frag); | |
336 | if (*input_line_pointer != ',') | |
337 | have_align = 0; | |
338 | else | |
339 | { | |
340 | have_align = 1; | |
341 | input_line_pointer++; | |
342 | SKIP_WHITESPACE (); | |
343 | } | |
344 | if (! have_align || *input_line_pointer != '"') | |
345 | { | |
346 | if (! have_align) | |
347 | temp = 0; | |
348 | else | |
349 | { | |
350 | temp = get_absolute_expression (); | |
351 | if (temp < 0) | |
352 | { | |
353 | temp = 0; | |
6ce8b369 | 354 | as_warn (_("common alignment negative; 0 assumed")); |
252b5132 RH |
355 | } |
356 | } | |
49309057 | 357 | if (symbol_get_obj (symbolP)->local) |
252b5132 RH |
358 | { |
359 | segT old_sec; | |
360 | int old_subsec; | |
361 | char *pfrag; | |
362 | int align; | |
363 | ||
364 | /* allocate_bss: */ | |
365 | old_sec = now_seg; | |
366 | old_subsec = now_subseg; | |
367 | if (temp) | |
368 | { | |
369 | /* convert to a power of 2 alignment */ | |
370 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
371 | if (temp != 1) | |
372 | { | |
6ce8b369 | 373 | as_bad (_("common alignment not a power of 2")); |
252b5132 RH |
374 | ignore_rest_of_line (); |
375 | return; | |
376 | } | |
377 | } | |
378 | else | |
379 | align = 0; | |
380 | record_alignment (bss_section, align); | |
381 | subseg_set (bss_section, 0); | |
382 | if (align) | |
383 | frag_align (align, 0, 0); | |
384 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
49309057 ILT |
385 | symbol_get_frag (symbolP)->fr_symbol = 0; |
386 | symbol_set_frag (symbolP, frag_now); | |
252b5132 RH |
387 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
388 | (offsetT) size, (char *) 0); | |
389 | *pfrag = 0; | |
390 | S_SET_SIZE (symbolP, size); | |
391 | S_SET_SEGMENT (symbolP, bss_section); | |
392 | S_CLEAR_EXTERNAL (symbolP); | |
393 | subseg_set (old_sec, old_subsec); | |
394 | } | |
395 | else | |
396 | { | |
397 | allocate_common: | |
398 | S_SET_VALUE (symbolP, (valueT) size); | |
399 | S_SET_ALIGN (symbolP, temp); | |
400 | S_SET_EXTERNAL (symbolP); | |
401 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
402 | } | |
403 | } | |
404 | else | |
405 | { | |
406 | input_line_pointer++; | |
407 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
408 | if (*input_line_pointer == '.') | |
409 | input_line_pointer++; | |
410 | /* @@ Some say data, some say bss. */ | |
411 | if (strncmp (input_line_pointer, "bss\"", 4) | |
412 | && strncmp (input_line_pointer, "data\"", 5)) | |
413 | { | |
414 | while (*--input_line_pointer != '"') | |
415 | ; | |
416 | input_line_pointer--; | |
417 | goto bad_common_segment; | |
418 | } | |
419 | while (*input_line_pointer++ != '"') | |
420 | ; | |
421 | goto allocate_common; | |
422 | } | |
423 | ||
49309057 | 424 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 RH |
425 | |
426 | demand_empty_rest_of_line (); | |
427 | return; | |
428 | ||
429 | { | |
430 | bad_common_segment: | |
431 | p = input_line_pointer; | |
432 | while (*p && *p != '\n') | |
433 | p++; | |
434 | c = *p; | |
435 | *p = '\0'; | |
436 | as_bad (_("bad .common segment %s"), input_line_pointer + 1); | |
437 | *p = c; | |
438 | input_line_pointer = p; | |
439 | ignore_rest_of_line (); | |
440 | return; | |
441 | } | |
442 | } | |
443 | ||
444 | static void | |
445 | obj_elf_local (ignore) | |
ab9da554 | 446 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
447 | { |
448 | char *name; | |
449 | int c; | |
450 | symbolS *symbolP; | |
451 | ||
452 | do | |
453 | { | |
454 | name = input_line_pointer; | |
455 | c = get_symbol_end (); | |
456 | symbolP = symbol_find_or_make (name); | |
457 | *input_line_pointer = c; | |
458 | SKIP_WHITESPACE (); | |
459 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 460 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
461 | if (c == ',') |
462 | { | |
463 | input_line_pointer++; | |
464 | SKIP_WHITESPACE (); | |
465 | if (*input_line_pointer == '\n') | |
466 | c = '\n'; | |
467 | } | |
468 | } | |
469 | while (c == ','); | |
470 | demand_empty_rest_of_line (); | |
471 | } | |
472 | ||
473 | static void | |
474 | obj_elf_weak (ignore) | |
ab9da554 | 475 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
476 | { |
477 | char *name; | |
478 | int c; | |
479 | symbolS *symbolP; | |
480 | ||
481 | do | |
482 | { | |
483 | name = input_line_pointer; | |
484 | c = get_symbol_end (); | |
485 | symbolP = symbol_find_or_make (name); | |
486 | *input_line_pointer = c; | |
487 | SKIP_WHITESPACE (); | |
488 | S_SET_WEAK (symbolP); | |
49309057 | 489 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
490 | if (c == ',') |
491 | { | |
492 | input_line_pointer++; | |
493 | SKIP_WHITESPACE (); | |
494 | if (*input_line_pointer == '\n') | |
495 | c = '\n'; | |
496 | } | |
497 | } | |
498 | while (c == ','); | |
499 | demand_empty_rest_of_line (); | |
500 | } | |
501 | ||
2e13b764 NC |
502 | static void |
503 | obj_elf_visibility (visibility) | |
504 | int visibility; | |
505 | { | |
506 | char *name; | |
507 | int c; | |
508 | symbolS *symbolP; | |
509 | asymbol *bfdsym; | |
510 | elf_symbol_type *elfsym; | |
511 | ||
512 | do | |
513 | { | |
514 | name = input_line_pointer; | |
515 | c = get_symbol_end (); | |
516 | symbolP = symbol_find_or_make (name); | |
517 | *input_line_pointer = c; | |
fa306131 | 518 | |
2e13b764 | 519 | SKIP_WHITESPACE (); |
fa306131 | 520 | |
2e13b764 NC |
521 | bfdsym = symbol_get_bfdsym (symbolP); |
522 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 523 | |
2e13b764 | 524 | assert (elfsym); |
fa306131 | 525 | |
2e13b764 | 526 | elfsym->internal_elf_sym.st_other = visibility; |
fa306131 | 527 | |
2e13b764 NC |
528 | if (c == ',') |
529 | { | |
530 | input_line_pointer ++; | |
fa306131 | 531 | |
2e13b764 | 532 | SKIP_WHITESPACE (); |
fa306131 | 533 | |
2e13b764 NC |
534 | if (*input_line_pointer == '\n') |
535 | c = '\n'; | |
536 | } | |
537 | } | |
538 | while (c == ','); | |
fa306131 | 539 | |
2e13b764 NC |
540 | demand_empty_rest_of_line (); |
541 | } | |
542 | ||
252b5132 RH |
543 | static segT previous_section; |
544 | static int previous_subsection; | |
545 | ||
9de8d8f1 RH |
546 | struct section_stack |
547 | { | |
548 | struct section_stack *next; | |
549 | segT seg, prev_seg; | |
550 | int subseg, prev_subseg; | |
551 | }; | |
552 | ||
553 | static struct section_stack *section_stack; | |
554 | ||
252b5132 RH |
555 | /* Handle the .section pseudo-op. This code supports two different |
556 | syntaxes. | |
557 | ||
558 | The first is found on Solaris, and looks like | |
559 | .section ".sec1",#alloc,#execinstr,#write | |
560 | Here the names after '#' are the SHF_* flags to turn on for the | |
561 | section. I'm not sure how it determines the SHT_* type (BFD | |
562 | doesn't really give us control over the type, anyhow). | |
563 | ||
564 | The second format is found on UnixWare, and probably most SVR4 | |
565 | machines, and looks like | |
566 | .section .sec1,"a",@progbits | |
567 | The quoted string may contain any combination of a, w, x, and | |
568 | represents the SHF_* flags to turn on for the section. The string | |
569 | beginning with '@' can be progbits or nobits. There should be | |
570 | other possibilities, but I don't know what they are. In any case, | |
571 | BFD doesn't really let us set the section type. */ | |
572 | ||
573 | /* Certain named sections have particular defined types, listed on p. | |
574 | 4-19 of the ABI. */ | |
575 | struct special_section | |
576 | { | |
577 | const char *name; | |
578 | int type; | |
579 | int attributes; | |
580 | }; | |
581 | ||
9de8d8f1 | 582 | static struct special_section const special_sections[] = |
252b5132 RH |
583 | { |
584 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
585 | { ".comment", SHT_PROGBITS, 0 }, | |
586 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
587 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
588 | { ".debug", SHT_PROGBITS, 0 }, | |
589 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
590 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
591 | { ".line", SHT_PROGBITS, 0 }, | |
592 | { ".note", SHT_NOTE, 0 }, | |
593 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
594 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
595 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
596 | ||
597 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
598 | ELF_TC_SPECIAL_SECTIONS | |
599 | #endif | |
600 | ||
601 | #if 0 | |
602 | /* The following section names are special, but they can not | |
603 | reasonably appear in assembler code. Some of the attributes are | |
604 | processor dependent. */ | |
605 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
606 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
607 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
608 | { ".got", SHT_PROGBITS, 0 }, | |
609 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
610 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
611 | { ".plt", SHT_PROGBITS, 0 }, | |
612 | { ".shstrtab",SHT_STRTAB, 0 }, | |
613 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
614 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
615 | #endif | |
616 | ||
617 | { NULL, 0, 0 } | |
618 | }; | |
619 | ||
8d28c9d7 | 620 | static void |
f5fa8ca2 | 621 | obj_elf_change_section (name, type, attr, entsize, push) |
9de8d8f1 | 622 | char *name; |
f5fa8ca2 | 623 | int type, attr, entsize, push; |
252b5132 | 624 | { |
742f45cf | 625 | asection *old_sec; |
252b5132 | 626 | segT sec; |
742f45cf AM |
627 | flagword flags; |
628 | int i; | |
252b5132 RH |
629 | |
630 | #ifdef md_flush_pending_output | |
631 | md_flush_pending_output (); | |
632 | #endif | |
633 | ||
9de8d8f1 RH |
634 | /* Switch to the section, creating it if necessary. */ |
635 | if (push) | |
636 | { | |
637 | struct section_stack *elt; | |
638 | elt = xmalloc (sizeof (struct section_stack)); | |
639 | elt->next = section_stack; | |
640 | elt->seg = now_seg; | |
641 | elt->prev_seg = previous_section; | |
642 | elt->subseg = now_subseg; | |
643 | elt->prev_subseg = previous_subsection; | |
644 | section_stack = elt; | |
645 | } | |
646 | previous_section = now_seg; | |
647 | previous_subsection = now_subseg; | |
648 | ||
742f45cf | 649 | old_sec = bfd_get_section_by_name (stdoutput, name); |
9de8d8f1 RH |
650 | sec = subseg_new (name, 0); |
651 | ||
742f45cf AM |
652 | /* See if this is one of the special sections. */ |
653 | for (i = 0; special_sections[i].name != NULL; i++) | |
654 | if (strcmp (name, special_sections[i].name) == 0) | |
655 | { | |
656 | if (type == SHT_NULL) | |
657 | type = special_sections[i].type; | |
658 | else if (type != special_sections[i].type) | |
659 | { | |
660 | if (old_sec == NULL) | |
9de8d8f1 | 661 | { |
6ce8b369 | 662 | as_warn (_("setting incorrect section type for %s"), name); |
742f45cf AM |
663 | } |
664 | else | |
665 | { | |
6ce8b369 | 666 | as_warn (_("ignoring incorrect section type for %s"), name); |
742f45cf | 667 | type = special_sections[i].type; |
9de8d8f1 | 668 | } |
9de8d8f1 | 669 | } |
742f45cf AM |
670 | if ((attr &~ special_sections[i].attributes) != 0 |
671 | && old_sec == NULL) | |
672 | { | |
673 | /* As a GNU extension, we permit a .note section to be | |
674 | allocatable. If the linker sees an allocateable .note | |
675 | section, it will create a PT_NOTE segment in the output | |
676 | file. */ | |
677 | if (strcmp (name, ".note") != 0 | |
678 | || attr != SHF_ALLOC) | |
6ce8b369 | 679 | as_warn (_("setting incorrect section attributes for %s"), |
742f45cf AM |
680 | name); |
681 | } | |
682 | attr |= special_sections[i].attributes; | |
683 | break; | |
684 | } | |
685 | ||
686 | /* Convert ELF type and flags to BFD flags. */ | |
687 | flags = (SEC_RELOC | |
688 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
689 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
690 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
691 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
692 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
693 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)); | |
9de8d8f1 | 694 | #ifdef md_elf_section_flags |
742f45cf | 695 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
696 | #endif |
697 | ||
742f45cf AM |
698 | if (old_sec == NULL) |
699 | { | |
700 | symbolS *secsym; | |
701 | ||
9de8d8f1 RH |
702 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
703 | if (type == SHT_NOBITS) | |
704 | seg_info (sec)->bss = 1; | |
705 | ||
706 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
707 | if (flags & SEC_MERGE) |
708 | sec->entsize = entsize; | |
9de8d8f1 RH |
709 | |
710 | /* Add a symbol for this section to the symbol table. */ | |
711 | secsym = symbol_find (name); | |
712 | if (secsym != NULL) | |
713 | symbol_set_bfdsym (secsym, sec->symbol); | |
714 | else | |
715 | symbol_table_insert (section_symbol (sec)); | |
716 | } | |
742f45cf AM |
717 | else if (attr != 0) |
718 | { | |
719 | /* If section attributes are specified the second time we see a | |
720 | particular section, then check that they are the same as we | |
721 | saw the first time. */ | |
722 | if ((old_sec->flags ^ flags) | |
723 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
f5fa8ca2 | 724 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS)) |
6ce8b369 | 725 | as_warn (_("ignoring changed section attributes for %s"), name); |
0e1a166b | 726 | else if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize) |
6ce8b369 | 727 | as_warn (_("ignoring changed section entity size for %s"), name); |
742f45cf | 728 | } |
9de8d8f1 RH |
729 | |
730 | #ifdef md_elf_section_change_hook | |
742f45cf | 731 | md_elf_section_change_hook (); |
9de8d8f1 RH |
732 | #endif |
733 | } | |
734 | ||
8d28c9d7 | 735 | static int |
9de8d8f1 RH |
736 | obj_elf_parse_section_letters (str, len) |
737 | char *str; | |
738 | size_t len; | |
739 | { | |
740 | int attr = 0; | |
741 | ||
742 | while (len > 0) | |
743 | { | |
744 | switch (*str) | |
745 | { | |
746 | case 'a': | |
747 | attr |= SHF_ALLOC; | |
748 | break; | |
749 | case 'w': | |
750 | attr |= SHF_WRITE; | |
751 | break; | |
752 | case 'x': | |
753 | attr |= SHF_EXECINSTR; | |
754 | break; | |
9469ddf0 | 755 | case 'M': |
f5fa8ca2 JJ |
756 | attr |= SHF_MERGE; |
757 | break; | |
9469ddf0 | 758 | case 'S': |
f5fa8ca2 JJ |
759 | attr |= SHF_STRINGS; |
760 | break; | |
34105363 L |
761 | /* Compatibility. */ |
762 | case 'm': | |
763 | if (*(str - 1) == 'a') | |
764 | { | |
765 | attr |= SHF_MERGE; | |
766 | if (len > 1 && str[1] == 's') | |
767 | { | |
768 | attr |= SHF_STRINGS; | |
769 | str++, len--; | |
770 | } | |
771 | break; | |
772 | } | |
9de8d8f1 RH |
773 | default: |
774 | { | |
6ce8b369 | 775 | char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S"); |
9de8d8f1 RH |
776 | #ifdef md_elf_section_letter |
777 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
778 | if (md_attr >= 0) | |
779 | attr |= md_attr; | |
780 | else | |
781 | #endif | |
782 | { | |
4c63da97 | 783 | as_warn ("%s", bad_msg); |
9de8d8f1 RH |
784 | attr = -1; |
785 | } | |
786 | } | |
787 | break; | |
788 | } | |
789 | str++, len--; | |
790 | } | |
791 | ||
792 | return attr; | |
793 | } | |
794 | ||
8d28c9d7 | 795 | static int |
9de8d8f1 RH |
796 | obj_elf_section_word (str, len) |
797 | char *str; | |
798 | size_t len; | |
799 | { | |
800 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
801 | return SHF_WRITE; | |
802 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
803 | return SHF_ALLOC; | |
804 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
805 | return SHF_EXECINSTR; | |
806 | ||
807 | #ifdef md_elf_section_word | |
808 | { | |
809 | int md_attr = md_elf_section_word (str, len); | |
810 | if (md_attr >= 0) | |
811 | return md_attr; | |
812 | } | |
813 | #endif | |
814 | ||
6ce8b369 | 815 | as_warn (_("unrecognized section attribute")); |
9de8d8f1 RH |
816 | return 0; |
817 | } | |
818 | ||
8d28c9d7 | 819 | static int |
9de8d8f1 RH |
820 | obj_elf_section_type (str, len) |
821 | char *str; | |
822 | size_t len; | |
823 | { | |
824 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
825 | return SHT_PROGBITS; | |
826 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
827 | return SHT_NOBITS; | |
828 | ||
829 | #ifdef md_elf_section_type | |
830 | { | |
831 | int md_type = md_elf_section_type (str, len); | |
832 | if (md_type >= 0) | |
833 | return md_type; | |
834 | } | |
835 | #endif | |
836 | ||
6ce8b369 | 837 | as_warn (_("unrecognized section type")); |
9de8d8f1 RH |
838 | return 0; |
839 | } | |
840 | ||
6ce8b369 AM |
841 | /* Get name of section. */ |
842 | static char * | |
843 | obj_elf_section_name () | |
844 | { | |
845 | char *name; | |
846 | ||
847 | SKIP_WHITESPACE (); | |
848 | if (*input_line_pointer == '"') | |
849 | { | |
850 | int dummy; | |
851 | ||
852 | name = demand_copy_C_string (&dummy); | |
853 | if (name == NULL) | |
854 | { | |
855 | ignore_rest_of_line (); | |
856 | return NULL; | |
857 | } | |
858 | } | |
859 | else | |
860 | { | |
861 | char *end = input_line_pointer; | |
862 | ||
863 | while (0 == strchr ("\n\t,; ", *end)) | |
864 | end++; | |
865 | if (end == input_line_pointer) | |
866 | { | |
867 | as_warn (_("missing name")); | |
868 | ignore_rest_of_line (); | |
869 | return NULL; | |
870 | } | |
871 | ||
872 | name = xmalloc (end - input_line_pointer + 1); | |
873 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
874 | name[end - input_line_pointer] = '\0'; | |
875 | input_line_pointer = end; | |
876 | } | |
877 | SKIP_WHITESPACE (); | |
878 | return name; | |
879 | } | |
880 | ||
9de8d8f1 RH |
881 | void |
882 | obj_elf_section (push) | |
883 | int push; | |
884 | { | |
6ce8b369 | 885 | char *name, *beg; |
9de8d8f1 | 886 | int type, attr, dummy; |
f5fa8ca2 | 887 | int entsize; |
9de8d8f1 | 888 | |
5b93d8bb | 889 | #ifndef TC_I370 |
252b5132 RH |
890 | if (flag_mri) |
891 | { | |
892 | char mri_type; | |
893 | ||
9de8d8f1 | 894 | #ifdef md_flush_pending_output |
60bcf0fa | 895 | md_flush_pending_output (); |
9de8d8f1 RH |
896 | #endif |
897 | ||
252b5132 RH |
898 | previous_section = now_seg; |
899 | previous_subsection = now_subseg; | |
900 | ||
901 | s_mri_sect (&mri_type); | |
902 | ||
903 | #ifdef md_elf_section_change_hook | |
904 | md_elf_section_change_hook (); | |
905 | #endif | |
906 | ||
907 | return; | |
908 | } | |
5b93d8bb | 909 | #endif /* ! defined (TC_I370) */ |
252b5132 | 910 | |
6ce8b369 AM |
911 | name = obj_elf_section_name (); |
912 | if (name == NULL) | |
913 | return; | |
252b5132 RH |
914 | type = SHT_NULL; |
915 | attr = 0; | |
f5fa8ca2 | 916 | entsize = 0; |
252b5132 RH |
917 | |
918 | if (*input_line_pointer == ',') | |
919 | { | |
920 | /* Skip the comma. */ | |
921 | ++input_line_pointer; | |
252b5132 RH |
922 | SKIP_WHITESPACE (); |
923 | ||
924 | if (*input_line_pointer == '"') | |
925 | { | |
9de8d8f1 RH |
926 | beg = demand_copy_C_string (&dummy); |
927 | if (beg == NULL) | |
252b5132 | 928 | { |
9de8d8f1 RH |
929 | ignore_rest_of_line (); |
930 | return; | |
252b5132 | 931 | } |
9de8d8f1 | 932 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
933 | |
934 | SKIP_WHITESPACE (); | |
935 | if (*input_line_pointer == ',') | |
936 | { | |
9de8d8f1 | 937 | char c; |
252b5132 RH |
938 | ++input_line_pointer; |
939 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
940 | c = *input_line_pointer; |
941 | if (c == '"') | |
252b5132 | 942 | { |
9de8d8f1 RH |
943 | beg = demand_copy_C_string (&dummy); |
944 | if (beg == NULL) | |
252b5132 | 945 | { |
9de8d8f1 RH |
946 | ignore_rest_of_line (); |
947 | return; | |
252b5132 | 948 | } |
9de8d8f1 | 949 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
950 | } |
951 | else if (c == '@' || c == '%') | |
952 | { | |
953 | beg = ++input_line_pointer; | |
954 | c = get_symbol_end (); | |
955 | *input_line_pointer = c; | |
956 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 RH |
957 | } |
958 | } | |
f5fa8ca2 JJ |
959 | |
960 | SKIP_WHITESPACE (); | |
6ce8b369 | 961 | if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',') |
f5fa8ca2 JJ |
962 | { |
963 | ++input_line_pointer; | |
964 | SKIP_WHITESPACE (); | |
965 | entsize = get_absolute_expression (); | |
6ce8b369 | 966 | SKIP_WHITESPACE (); |
f5fa8ca2 JJ |
967 | if (entsize < 0) |
968 | { | |
6ce8b369 | 969 | as_warn (_("invalid merge entity size")); |
f5fa8ca2 JJ |
970 | attr &= ~SHF_MERGE; |
971 | entsize = 0; | |
972 | } | |
973 | } | |
6ce8b369 AM |
974 | else if ((attr & SHF_MERGE) != 0) |
975 | { | |
976 | as_warn (_("entity size for SHF_MERGE not specified")); | |
977 | attr &= ~SHF_MERGE; | |
978 | } | |
252b5132 RH |
979 | } |
980 | else | |
981 | { | |
982 | do | |
983 | { | |
9de8d8f1 RH |
984 | char c; |
985 | ||
252b5132 RH |
986 | SKIP_WHITESPACE (); |
987 | if (*input_line_pointer != '#') | |
988 | { | |
6ce8b369 | 989 | as_warn (_("character following name is not '#'")); |
252b5132 RH |
990 | ignore_rest_of_line (); |
991 | return; | |
992 | } | |
9de8d8f1 RH |
993 | beg = ++input_line_pointer; |
994 | c = get_symbol_end (); | |
995 | *input_line_pointer = c; | |
996 | ||
997 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
998 | ||
252b5132 RH |
999 | SKIP_WHITESPACE (); |
1000 | } | |
1001 | while (*input_line_pointer++ == ','); | |
1002 | --input_line_pointer; | |
1003 | } | |
1004 | } | |
1005 | ||
252b5132 | 1006 | demand_empty_rest_of_line (); |
9de8d8f1 | 1007 | |
f5fa8ca2 | 1008 | obj_elf_change_section (name, type, attr, entsize, push); |
252b5132 RH |
1009 | } |
1010 | ||
1011 | /* Change to the .data section. */ | |
1012 | ||
16b93d88 | 1013 | void |
252b5132 RH |
1014 | obj_elf_data (i) |
1015 | int i; | |
1016 | { | |
1017 | #ifdef md_flush_pending_output | |
1018 | md_flush_pending_output (); | |
1019 | #endif | |
1020 | ||
1021 | previous_section = now_seg; | |
1022 | previous_subsection = now_subseg; | |
1023 | s_data (i); | |
1024 | ||
1025 | #ifdef md_elf_section_change_hook | |
1026 | md_elf_section_change_hook (); | |
1027 | #endif | |
1028 | } | |
1029 | ||
1030 | /* Change to the .text section. */ | |
1031 | ||
16b93d88 | 1032 | void |
252b5132 RH |
1033 | obj_elf_text (i) |
1034 | int i; | |
1035 | { | |
1036 | #ifdef md_flush_pending_output | |
1037 | md_flush_pending_output (); | |
1038 | #endif | |
1039 | ||
1040 | previous_section = now_seg; | |
1041 | previous_subsection = now_subseg; | |
1042 | s_text (i); | |
1043 | ||
1044 | #ifdef md_elf_section_change_hook | |
1045 | md_elf_section_change_hook (); | |
1046 | #endif | |
1047 | } | |
1048 | ||
1049 | static void | |
1050 | obj_elf_subsection (ignore) | |
ab9da554 | 1051 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1052 | { |
1053 | register int temp; | |
1054 | ||
1055 | #ifdef md_flush_pending_output | |
1056 | md_flush_pending_output (); | |
1057 | #endif | |
1058 | ||
1059 | previous_section = now_seg; | |
1060 | previous_subsection = now_subseg; | |
1061 | ||
1062 | temp = get_absolute_expression (); | |
1063 | subseg_set (now_seg, (subsegT) temp); | |
1064 | demand_empty_rest_of_line (); | |
1065 | ||
1066 | #ifdef md_elf_section_change_hook | |
1067 | md_elf_section_change_hook (); | |
1068 | #endif | |
1069 | } | |
1070 | ||
1071 | /* This can be called from the processor backends if they change | |
1072 | sections. */ | |
1073 | ||
1074 | void | |
1075 | obj_elf_section_change_hook () | |
1076 | { | |
1077 | previous_section = now_seg; | |
1078 | previous_subsection = now_subseg; | |
1079 | } | |
1080 | ||
1081 | void | |
1082 | obj_elf_previous (ignore) | |
ab9da554 | 1083 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1084 | { |
9de8d8f1 RH |
1085 | segT new_section; |
1086 | int new_subsection; | |
1087 | ||
252b5132 RH |
1088 | if (previous_section == 0) |
1089 | { | |
6ce8b369 | 1090 | as_warn (_(".previous without corresponding .section; ignored")); |
252b5132 RH |
1091 | return; |
1092 | } | |
1093 | ||
1094 | #ifdef md_flush_pending_output | |
1095 | md_flush_pending_output (); | |
1096 | #endif | |
1097 | ||
9de8d8f1 RH |
1098 | new_section = previous_section; |
1099 | new_subsection = previous_subsection; | |
1100 | previous_section = now_seg; | |
1101 | previous_subsection = now_subseg; | |
1102 | subseg_set (new_section, new_subsection); | |
1103 | ||
1104 | #ifdef md_elf_section_change_hook | |
1105 | md_elf_section_change_hook (); | |
1106 | #endif | |
1107 | } | |
1108 | ||
1109 | static void | |
1110 | obj_elf_popsection (xxx) | |
ab9da554 | 1111 | int xxx ATTRIBUTE_UNUSED; |
9de8d8f1 RH |
1112 | { |
1113 | struct section_stack *top = section_stack; | |
1114 | ||
1115 | if (top == NULL) | |
1116 | { | |
6ce8b369 | 1117 | as_warn (_(".popsection without corresponding .pushsection; ignored")); |
9de8d8f1 RH |
1118 | return; |
1119 | } | |
1120 | ||
1121 | #ifdef md_flush_pending_output | |
1122 | md_flush_pending_output (); | |
1123 | #endif | |
1124 | ||
1125 | section_stack = top->next; | |
1126 | previous_section = top->prev_seg; | |
1127 | previous_subsection = top->prev_subseg; | |
1128 | subseg_set (top->seg, top->subseg); | |
1129 | free (top); | |
252b5132 RH |
1130 | |
1131 | #ifdef md_elf_section_change_hook | |
1132 | md_elf_section_change_hook (); | |
1133 | #endif | |
1134 | } | |
1135 | ||
1136 | static void | |
1137 | obj_elf_line (ignore) | |
ab9da554 | 1138 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1139 | { |
1140 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1141 | delightful bug, so we are not being incompatible here. */ |
252b5132 RH |
1142 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); |
1143 | demand_empty_rest_of_line (); | |
1144 | } | |
1145 | ||
1146 | /* This handles the .symver pseudo-op, which is used to specify a | |
1147 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1148 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1149 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1150 | with the same value as the symbol NAME. */ | |
1151 | ||
1152 | static void | |
1153 | obj_elf_symver (ignore) | |
ab9da554 | 1154 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1155 | { |
1156 | char *name; | |
1157 | char c; | |
468cced8 | 1158 | char old_lexat; |
252b5132 RH |
1159 | symbolS *sym; |
1160 | ||
1161 | name = input_line_pointer; | |
1162 | c = get_symbol_end (); | |
1163 | ||
1164 | sym = symbol_find_or_make (name); | |
1165 | ||
1166 | *input_line_pointer = c; | |
1167 | ||
252b5132 RH |
1168 | SKIP_WHITESPACE (); |
1169 | if (*input_line_pointer != ',') | |
1170 | { | |
1171 | as_bad (_("expected comma after name in .symver")); | |
1172 | ignore_rest_of_line (); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | ++input_line_pointer; | |
1177 | name = input_line_pointer; | |
468cced8 AM |
1178 | |
1179 | /* Temporarily include '@' in symbol names. */ | |
1180 | old_lexat = lex_type[(unsigned char) '@']; | |
1181 | lex_type[(unsigned char) '@'] |= LEX_NAME; | |
1182 | c = get_symbol_end (); | |
1183 | lex_type[(unsigned char) '@'] = old_lexat; | |
252b5132 | 1184 | |
339681c0 L |
1185 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1186 | { | |
1187 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1188 | |
339681c0 | 1189 | *input_line_pointer = c; |
252b5132 | 1190 | |
6f620856 L |
1191 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1192 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1193 | { |
1194 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1195 | symbol_get_obj (sym)->versioned_name, | |
1196 | S_GET_NAME (sym)); | |
1197 | ignore_rest_of_line (); | |
1198 | return; | |
1199 | } | |
1200 | } | |
1201 | else | |
252b5132 | 1202 | { |
339681c0 L |
1203 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1204 | { | |
1205 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1206 | name, symbol_get_obj (sym)->versioned_name, | |
1207 | S_GET_NAME (sym)); | |
1208 | ignore_rest_of_line (); | |
1209 | return; | |
1210 | } | |
1211 | ||
1212 | *input_line_pointer = c; | |
252b5132 RH |
1213 | } |
1214 | ||
1215 | demand_empty_rest_of_line (); | |
1216 | } | |
1217 | ||
1218 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1219 | to the linker the hierarchy in which a particular table resides. The | |
1220 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1221 | ||
904a31bf | 1222 | struct fix * |
252b5132 | 1223 | obj_elf_vtable_inherit (ignore) |
ab9da554 | 1224 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1225 | { |
1226 | char *cname, *pname; | |
1227 | symbolS *csym, *psym; | |
1228 | char c, bad = 0; | |
1229 | ||
1230 | if (*input_line_pointer == '#') | |
1231 | ++input_line_pointer; | |
1232 | ||
1233 | cname = input_line_pointer; | |
1234 | c = get_symbol_end (); | |
1235 | csym = symbol_find (cname); | |
1236 | ||
1237 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1238 | the same child symbol. Also, we can currently only do this if the | |
1239 | child symbol is already exists and is placed in a fragment. */ | |
1240 | ||
49309057 | 1241 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 RH |
1242 | { |
1243 | as_bad ("expected `%s' to have already been set for .vtable_inherit", | |
1244 | cname); | |
1245 | bad = 1; | |
1246 | } | |
1247 | ||
1248 | *input_line_pointer = c; | |
1249 | ||
1250 | SKIP_WHITESPACE (); | |
1251 | if (*input_line_pointer != ',') | |
1252 | { | |
1253 | as_bad ("expected comma after name in .vtable_inherit"); | |
1254 | ignore_rest_of_line (); | |
904a31bf | 1255 | return NULL; |
252b5132 RH |
1256 | } |
1257 | ||
1258 | ++input_line_pointer; | |
1259 | SKIP_WHITESPACE (); | |
1260 | ||
1261 | if (*input_line_pointer == '#') | |
1262 | ++input_line_pointer; | |
1263 | ||
1264 | if (input_line_pointer[0] == '0' | |
1265 | && (input_line_pointer[1] == '\0' | |
3882b010 | 1266 | || ISSPACE (input_line_pointer[1]))) |
252b5132 RH |
1267 | { |
1268 | psym = section_symbol (absolute_section); | |
1269 | ++input_line_pointer; | |
1270 | } | |
1271 | else | |
1272 | { | |
1273 | pname = input_line_pointer; | |
1274 | c = get_symbol_end (); | |
1275 | psym = symbol_find_or_make (pname); | |
1276 | *input_line_pointer = c; | |
1277 | } | |
1278 | ||
1279 | demand_empty_rest_of_line (); | |
1280 | ||
1281 | if (bad) | |
904a31bf | 1282 | return NULL; |
252b5132 | 1283 | |
49309057 | 1284 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1285 | return fix_new (symbol_get_frag (csym), |
1286 | symbol_get_value_expression (csym)->X_add_number, | |
1287 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1288 | } |
fa306131 | 1289 | |
252b5132 RH |
1290 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1291 | to the linker that a vtable slot was used. The syntax is | |
1292 | ".vtable_entry tablename, offset". */ | |
1293 | ||
904a31bf | 1294 | struct fix * |
252b5132 | 1295 | obj_elf_vtable_entry (ignore) |
ab9da554 | 1296 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1297 | { |
1298 | char *name; | |
1299 | symbolS *sym; | |
1300 | offsetT offset; | |
1301 | char c; | |
1302 | ||
1303 | if (*input_line_pointer == '#') | |
1304 | ++input_line_pointer; | |
1305 | ||
1306 | name = input_line_pointer; | |
1307 | c = get_symbol_end (); | |
1308 | sym = symbol_find_or_make (name); | |
1309 | *input_line_pointer = c; | |
1310 | ||
1311 | SKIP_WHITESPACE (); | |
1312 | if (*input_line_pointer != ',') | |
1313 | { | |
1314 | as_bad ("expected comma after name in .vtable_entry"); | |
1315 | ignore_rest_of_line (); | |
904a31bf | 1316 | return NULL; |
252b5132 RH |
1317 | } |
1318 | ||
1319 | ++input_line_pointer; | |
1320 | if (*input_line_pointer == '#') | |
1321 | ++input_line_pointer; | |
1322 | ||
1323 | offset = get_absolute_expression (); | |
1324 | ||
252b5132 | 1325 | demand_empty_rest_of_line (); |
904a31bf AM |
1326 | |
1327 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1328 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1329 | } |
1330 | ||
1331 | void | |
4c63da97 | 1332 | elf_obj_read_begin_hook () |
252b5132 RH |
1333 | { |
1334 | #ifdef NEED_ECOFF_DEBUG | |
1335 | if (ECOFF_DEBUGGING) | |
1336 | ecoff_read_begin_hook (); | |
1337 | #endif | |
1338 | } | |
1339 | ||
1340 | void | |
4c63da97 | 1341 | elf_obj_symbol_new_hook (symbolP) |
252b5132 RH |
1342 | symbolS *symbolP; |
1343 | { | |
49309057 ILT |
1344 | struct elf_obj_sy *sy_obj; |
1345 | ||
1346 | sy_obj = symbol_get_obj (symbolP); | |
1347 | sy_obj->size = NULL; | |
1348 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1349 | |
1350 | #ifdef NEED_ECOFF_DEBUG | |
1351 | if (ECOFF_DEBUGGING) | |
1352 | ecoff_symbol_new_hook (symbolP); | |
1353 | #endif | |
1354 | } | |
1355 | ||
8fd3e36b AM |
1356 | /* When setting one symbol equal to another, by default we probably |
1357 | want them to have the same "size", whatever it means in the current | |
1358 | context. */ | |
1359 | ||
1360 | void | |
1361 | elf_copy_symbol_attributes (dest, src) | |
1362 | symbolS *dest, *src; | |
1363 | { | |
1364 | struct elf_obj_sy *srcelf = symbol_get_obj (src); | |
1365 | struct elf_obj_sy *destelf = symbol_get_obj (dest); | |
1366 | if (srcelf->size) | |
1367 | { | |
1368 | if (destelf->size == NULL) | |
1369 | destelf->size = | |
1370 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1371 | *destelf->size = *srcelf->size; | |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | if (destelf->size != NULL) | |
1376 | free (destelf->size); | |
1377 | destelf->size = NULL; | |
1378 | } | |
1379 | S_SET_SIZE (dest, S_GET_SIZE (src)); | |
1380 | S_SET_OTHER (dest, S_GET_OTHER (src)); | |
1381 | } | |
1382 | ||
252b5132 RH |
1383 | void |
1384 | obj_elf_version (ignore) | |
ab9da554 | 1385 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1386 | { |
1387 | char *name; | |
1388 | unsigned int c; | |
1389 | char ch; | |
1390 | char *p; | |
1391 | asection *seg = now_seg; | |
1392 | subsegT subseg = now_subseg; | |
1393 | Elf_Internal_Note i_note; | |
1394 | Elf_External_Note e_note; | |
1395 | asection *note_secp = (asection *) NULL; | |
1396 | int i, len; | |
1397 | ||
1398 | SKIP_WHITESPACE (); | |
1399 | if (*input_line_pointer == '\"') | |
1400 | { | |
bf514e21 | 1401 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1402 | name = input_line_pointer; |
1403 | ||
1404 | while (is_a_char (c = next_char_of_string ())) | |
1405 | ; | |
1406 | c = *input_line_pointer; | |
1407 | *input_line_pointer = '\0'; | |
1408 | *(input_line_pointer - 1) = '\0'; | |
1409 | *input_line_pointer = c; | |
1410 | ||
1411 | /* create the .note section */ | |
1412 | ||
1413 | note_secp = subseg_new (".note", 0); | |
1414 | bfd_set_section_flags (stdoutput, | |
1415 | note_secp, | |
1416 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1417 | ||
1418 | /* process the version string */ | |
1419 | ||
1420 | len = strlen (name); | |
1421 | ||
1422 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ | |
1423 | i_note.descsz = 0; /* no description */ | |
1424 | i_note.type = NT_VERSION; | |
1425 | p = frag_more (sizeof (e_note.namesz)); | |
1426 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1427 | p = frag_more (sizeof (e_note.descsz)); | |
1428 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1429 | p = frag_more (sizeof (e_note.type)); | |
1430 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1431 | ||
1432 | for (i = 0; i < len; i++) | |
1433 | { | |
1434 | ch = *(name + i); | |
1435 | { | |
1436 | FRAG_APPEND_1_CHAR (ch); | |
1437 | } | |
1438 | } | |
1439 | frag_align (2, 0, 0); | |
1440 | ||
1441 | subseg_set (seg, subseg); | |
1442 | } | |
1443 | else | |
1444 | { | |
6ce8b369 | 1445 | as_bad (_("expected quoted string")); |
252b5132 RH |
1446 | } |
1447 | demand_empty_rest_of_line (); | |
1448 | } | |
1449 | ||
1450 | static void | |
1451 | obj_elf_size (ignore) | |
ab9da554 | 1452 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1453 | { |
1454 | char *name = input_line_pointer; | |
1455 | char c = get_symbol_end (); | |
1456 | char *p; | |
1457 | expressionS exp; | |
1458 | symbolS *sym; | |
1459 | ||
1460 | p = input_line_pointer; | |
1461 | *p = c; | |
1462 | SKIP_WHITESPACE (); | |
1463 | if (*input_line_pointer != ',') | |
1464 | { | |
1465 | *p = 0; | |
1466 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1467 | *p = c; | |
1468 | ignore_rest_of_line (); | |
1469 | return; | |
1470 | } | |
1471 | input_line_pointer++; | |
1472 | expression (&exp); | |
1473 | if (exp.X_op == O_absent) | |
1474 | { | |
1475 | as_bad (_("missing expression in .size directive")); | |
1476 | exp.X_op = O_constant; | |
1477 | exp.X_add_number = 0; | |
1478 | } | |
1479 | *p = 0; | |
1480 | sym = symbol_find_or_make (name); | |
1481 | *p = c; | |
1482 | if (exp.X_op == O_constant) | |
c538998c JJ |
1483 | { |
1484 | S_SET_SIZE (sym, exp.X_add_number); | |
1485 | if (symbol_get_obj (sym)->size) | |
1486 | { | |
1487 | xfree (symbol_get_obj (sym)->size); | |
1488 | symbol_get_obj (sym)->size = NULL; | |
1489 | } | |
1490 | } | |
252b5132 RH |
1491 | else |
1492 | { | |
49309057 ILT |
1493 | symbol_get_obj (sym)->size = |
1494 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1495 | *symbol_get_obj (sym)->size = exp; | |
252b5132 RH |
1496 | } |
1497 | demand_empty_rest_of_line (); | |
1498 | } | |
1499 | ||
1500 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1501 | There are five syntaxes: |
fa306131 | 1502 | |
252b5132 RH |
1503 | The first (used on Solaris) is |
1504 | .type SYM,#function | |
1505 | The second (used on UnixWare) is | |
1506 | .type SYM,@function | |
1507 | The third (reportedly to be used on Irix 6.0) is | |
1508 | .type SYM STT_FUNC | |
1509 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1510 | .type SYM,%function | |
aa8c34c3 JE |
1511 | The fifth (used on SVR4/860) is |
1512 | .type SYM,"function" | |
252b5132 RH |
1513 | */ |
1514 | ||
1515 | static void | |
1516 | obj_elf_type (ignore) | |
ab9da554 | 1517 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1518 | { |
1519 | char *name; | |
1520 | char c; | |
1521 | int type; | |
1522 | const char *typename; | |
1523 | symbolS *sym; | |
904a31bf | 1524 | elf_symbol_type *elfsym; |
252b5132 RH |
1525 | |
1526 | name = input_line_pointer; | |
1527 | c = get_symbol_end (); | |
1528 | sym = symbol_find_or_make (name); | |
904a31bf | 1529 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1530 | *input_line_pointer = c; |
1531 | ||
1532 | SKIP_WHITESPACE (); | |
1533 | if (*input_line_pointer == ',') | |
1534 | ++input_line_pointer; | |
1535 | ||
1536 | SKIP_WHITESPACE (); | |
1537 | if ( *input_line_pointer == '#' | |
1538 | || *input_line_pointer == '@' | |
aa8c34c3 | 1539 | || *input_line_pointer == '"' |
252b5132 RH |
1540 | || *input_line_pointer == '%') |
1541 | ++input_line_pointer; | |
1542 | ||
1543 | typename = input_line_pointer; | |
1544 | c = get_symbol_end (); | |
1545 | ||
1546 | type = 0; | |
1547 | if (strcmp (typename, "function") == 0 | |
1548 | || strcmp (typename, "STT_FUNC") == 0) | |
1549 | type = BSF_FUNCTION; | |
1550 | else if (strcmp (typename, "object") == 0 | |
1551 | || strcmp (typename, "STT_OBJECT") == 0) | |
1552 | type = BSF_OBJECT; | |
904a31bf AM |
1553 | #ifdef md_elf_symbol_type |
1554 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1555 | ; | |
1556 | #endif | |
252b5132 | 1557 | else |
6ce8b369 | 1558 | as_bad (_("unrecognized symbol type \"%s\""), typename); |
252b5132 RH |
1559 | |
1560 | *input_line_pointer = c; | |
1561 | ||
aa8c34c3 JE |
1562 | if (*input_line_pointer == '"') |
1563 | ++input_line_pointer; | |
1564 | ||
904a31bf | 1565 | elfsym->symbol.flags |= type; |
252b5132 RH |
1566 | |
1567 | demand_empty_rest_of_line (); | |
1568 | } | |
1569 | ||
1570 | static void | |
1571 | obj_elf_ident (ignore) | |
ab9da554 | 1572 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1573 | { |
1574 | static segT comment_section; | |
1575 | segT old_section = now_seg; | |
1576 | int old_subsection = now_subseg; | |
1577 | ||
5f91fe03 ILT |
1578 | #ifdef md_flush_pending_output |
1579 | md_flush_pending_output (); | |
1580 | #endif | |
1581 | ||
252b5132 RH |
1582 | if (!comment_section) |
1583 | { | |
1584 | char *p; | |
1585 | comment_section = subseg_new (".comment", 0); | |
1586 | bfd_set_section_flags (stdoutput, comment_section, | |
1587 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1588 | p = frag_more (1); | |
1589 | *p = 0; | |
1590 | } | |
1591 | else | |
1592 | subseg_set (comment_section, 0); | |
1593 | stringer (1); | |
1594 | subseg_set (old_section, old_subsection); | |
1595 | } | |
1596 | ||
1597 | #ifdef INIT_STAB_SECTION | |
1598 | ||
1599 | /* The first entry in a .stabs section is special. */ | |
1600 | ||
1601 | void | |
1602 | obj_elf_init_stab_section (seg) | |
1603 | segT seg; | |
1604 | { | |
1605 | char *file; | |
1606 | char *p; | |
1607 | char *stabstr_name; | |
1608 | unsigned int stroff; | |
1609 | ||
1610 | /* Force the section to align to a longword boundary. Without this, | |
1611 | UnixWare ar crashes. */ | |
1612 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1613 | ||
bf514e21 | 1614 | /* Make space for this first symbol. */ |
252b5132 | 1615 | p = frag_more (12); |
bf514e21 | 1616 | /* Zero it out. */ |
252b5132 RH |
1617 | memset (p, 0, 12); |
1618 | as_where (&file, (unsigned int *) NULL); | |
1619 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); | |
1620 | strcpy (stabstr_name, segment_name (seg)); | |
1621 | strcat (stabstr_name, "str"); | |
1622 | stroff = get_stab_string_offset (file, stabstr_name); | |
1623 | know (stroff == 1); | |
1624 | md_number_to_chars (p, stroff, 4); | |
1625 | seg_info (seg)->stabu.p = p; | |
1626 | } | |
1627 | ||
1628 | #endif | |
1629 | ||
1630 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1631 | ||
1632 | static void | |
1633 | adjust_stab_sections (abfd, sec, xxx) | |
1634 | bfd *abfd; | |
1635 | asection *sec; | |
ab9da554 | 1636 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1637 | { |
1638 | char *name; | |
1639 | asection *strsec; | |
1640 | char *p; | |
1641 | int strsz, nsyms; | |
1642 | ||
1643 | if (strncmp (".stab", sec->name, 5)) | |
1644 | return; | |
1645 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1646 | return; | |
1647 | ||
1648 | name = (char *) alloca (strlen (sec->name) + 4); | |
1649 | strcpy (name, sec->name); | |
1650 | strcat (name, "str"); | |
1651 | strsec = bfd_get_section_by_name (abfd, name); | |
1652 | if (strsec) | |
1653 | strsz = bfd_section_size (abfd, strsec); | |
1654 | else | |
1655 | strsz = 0; | |
1656 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1657 | ||
1658 | p = seg_info (sec)->stabu.p; | |
1659 | assert (p != 0); | |
1660 | ||
1661 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); | |
1662 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
1663 | } | |
1664 | ||
1665 | #ifdef NEED_ECOFF_DEBUG | |
1666 | ||
1667 | /* This function is called by the ECOFF code. It is supposed to | |
1668 | record the external symbol information so that the backend can | |
1669 | write it out correctly. The ELF backend doesn't actually handle | |
1670 | this at the moment, so we do it ourselves. We save the information | |
1671 | in the symbol. */ | |
1672 | ||
1673 | void | |
1674 | elf_ecoff_set_ext (sym, ext) | |
1675 | symbolS *sym; | |
1676 | struct ecoff_extr *ext; | |
1677 | { | |
49309057 | 1678 | symbol_get_bfdsym (sym)->udata.p = (PTR) ext; |
252b5132 RH |
1679 | } |
1680 | ||
1681 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1682 | supposed to *EXT to the external symbol information, and return | |
1683 | whether the symbol should be used at all. */ | |
1684 | ||
1685 | static boolean | |
1686 | elf_get_extr (sym, ext) | |
1687 | asymbol *sym; | |
1688 | EXTR *ext; | |
1689 | { | |
1690 | if (sym->udata.p == NULL) | |
1691 | return false; | |
1692 | *ext = *(EXTR *) sym->udata.p; | |
1693 | return true; | |
1694 | } | |
1695 | ||
1696 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1697 | nothing to do for ELF. */ | |
1698 | ||
1699 | /*ARGSUSED*/ | |
1700 | static void | |
1701 | elf_set_index (sym, indx) | |
5f91fe03 ILT |
1702 | asymbol *sym ATTRIBUTE_UNUSED; |
1703 | bfd_size_type indx ATTRIBUTE_UNUSED; | |
252b5132 RH |
1704 | { |
1705 | } | |
1706 | ||
1707 | #endif /* NEED_ECOFF_DEBUG */ | |
1708 | ||
1709 | void | |
1710 | elf_frob_symbol (symp, puntp) | |
1711 | symbolS *symp; | |
1712 | int *puntp; | |
1713 | { | |
49309057 ILT |
1714 | struct elf_obj_sy *sy_obj; |
1715 | ||
252b5132 RH |
1716 | #ifdef NEED_ECOFF_DEBUG |
1717 | if (ECOFF_DEBUGGING) | |
1718 | ecoff_frob_symbol (symp); | |
1719 | #endif | |
1720 | ||
49309057 ILT |
1721 | sy_obj = symbol_get_obj (symp); |
1722 | ||
1723 | if (sy_obj->size != NULL) | |
252b5132 | 1724 | { |
49309057 | 1725 | switch (sy_obj->size->X_op) |
252b5132 RH |
1726 | { |
1727 | case O_subtract: | |
1728 | S_SET_SIZE (symp, | |
49309057 ILT |
1729 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1730 | + sy_obj->size->X_add_number | |
1731 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1732 | break; |
1733 | case O_constant: | |
1734 | S_SET_SIZE (symp, | |
49309057 ILT |
1735 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1736 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1737 | break; |
1738 | default: | |
1739 | as_bad (_(".size expression too complicated to fix up")); | |
1740 | break; | |
1741 | } | |
49309057 ILT |
1742 | free (sy_obj->size); |
1743 | sy_obj->size = NULL; | |
252b5132 RH |
1744 | } |
1745 | ||
49309057 | 1746 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1747 | { |
79082ff0 L |
1748 | char *p; |
1749 | ||
1750 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1751 | know (p != NULL); | |
1752 | ||
252b5132 RH |
1753 | /* This symbol was given a new name with the .symver directive. |
1754 | ||
1755 | If this is an external reference, just rename the symbol to | |
1756 | include the version string. This will make the relocs be | |
1757 | against the correct versioned symbol. | |
1758 | ||
1759 | If this is a definition, add an alias. FIXME: Using an alias | |
1760 | will permit the debugging information to refer to the right | |
1761 | symbol. However, it's not clear whether it is the best | |
1762 | approach. */ | |
1763 | ||
1764 | if (! S_IS_DEFINED (symp)) | |
1765 | { | |
252b5132 RH |
1766 | /* Verify that the name isn't using the @@ syntax--this is |
1767 | reserved for definitions of the default version to link | |
1768 | against. */ | |
252b5132 RH |
1769 | if (p[1] == ELF_VER_CHR) |
1770 | { | |
1771 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1772 | sy_obj->versioned_name); |
252b5132 RH |
1773 | *puntp = true; |
1774 | } | |
49309057 | 1775 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1776 | } |
1777 | else | |
1778 | { | |
79082ff0 L |
1779 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) |
1780 | { | |
1781 | size_t l; | |
1782 | ||
1783 | /* The @@@ syntax is a special case. It renames the | |
1784 | symbol name to versioned_name with one `@' removed. */ | |
1785 | l = strlen (&p[3]) + 1; | |
1786 | memmove (&p [2], &p[3], l); | |
1787 | S_SET_NAME (symp, sy_obj->versioned_name); | |
1788 | } | |
1789 | else | |
1790 | { | |
1791 | symbolS *symp2; | |
252b5132 | 1792 | |
79082ff0 L |
1793 | /* FIXME: Creating a new symbol here is risky. We're |
1794 | in the final loop over the symbol table. We can | |
1795 | get away with it only because the symbol goes to | |
1796 | the end of the list, where the loop will still see | |
1797 | it. It would probably be better to do this in | |
1798 | obj_frob_file_before_adjust. */ | |
252b5132 | 1799 | |
79082ff0 | 1800 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1801 | |
79082ff0 | 1802 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1803 | |
79082ff0 | 1804 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1805 | |
79082ff0 L |
1806 | /* Subtracting out the frag address here is a hack |
1807 | because we are in the middle of the final loop. */ | |
1808 | S_SET_VALUE (symp2, | |
1809 | (S_GET_VALUE (symp) | |
1810 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1811 | |
79082ff0 | 1812 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1813 | |
79082ff0 L |
1814 | /* This will copy over the size information. */ |
1815 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1816 | |
79082ff0 L |
1817 | if (S_IS_WEAK (symp)) |
1818 | S_SET_WEAK (symp2); | |
252b5132 | 1819 | |
79082ff0 L |
1820 | if (S_IS_EXTERNAL (symp)) |
1821 | S_SET_EXTERNAL (symp2); | |
1822 | } | |
252b5132 RH |
1823 | } |
1824 | } | |
1825 | ||
1826 | /* Double check weak symbols. */ | |
49309057 | 1827 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1828 | { |
1829 | if (S_IS_COMMON (symp)) | |
6ce8b369 | 1830 | as_bad (_("symbol `%s' can not be both weak and common"), |
252b5132 RH |
1831 | S_GET_NAME (symp)); |
1832 | } | |
1833 | ||
1834 | #ifdef TC_MIPS | |
1835 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1836 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1837 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1838 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1839 | because that is the only time gcc will generate the necessary | |
1840 | .global directives to mark functions. */ | |
1841 | ||
1842 | if (S_IS_COMMON (symp)) | |
49309057 | 1843 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1844 | |
1845 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1846 | && ! S_IS_DEFINED (symp) |
1847 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1848 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 RH |
1849 | #endif |
1850 | ||
c5e54cc2 ILT |
1851 | #if 0 /* TC_PPC */ |
1852 | /* If TC_PPC is defined, we used to force the type of a symbol to be | |
1853 | BSF_OBJECT if it was otherwise unset. This was required by some | |
1854 | version of VxWorks. Thomas de Lellis <tdel@windriver.com> says | |
1855 | that this is no longer needed, so it is now commented out. */ | |
49309057 ILT |
1856 | if ((symbol_get_bfdsym (symp)->flags |
1857 | & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 | |
252b5132 | 1858 | && S_IS_DEFINED (symp)) |
49309057 | 1859 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1860 | #endif |
1861 | } | |
1862 | ||
1863 | void | |
1864 | elf_frob_file () | |
1865 | { | |
1866 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); | |
1867 | ||
1868 | #ifdef elf_tc_final_processing | |
1869 | elf_tc_final_processing (); | |
1870 | #endif | |
1871 | } | |
1872 | ||
4a1805b1 | 1873 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
1874 | |
1875 | void | |
1876 | elf_frob_file_before_adjust () | |
1877 | { | |
1878 | if (symbol_rootP) | |
1879 | { | |
1880 | symbolS *symp; | |
1881 | ||
1882 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
79082ff0 L |
1883 | if (symbol_get_obj (symp)->versioned_name) |
1884 | { | |
1885 | if (!S_IS_DEFINED (symp)) | |
1886 | { | |
1887 | char *p; | |
1888 | ||
1889 | /* The @@@ syntax is a special case. If the symbol is | |
1890 | not defined, 2 `@'s will be removed from the | |
1891 | versioned_name. */ | |
1892 | ||
1893 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
1894 | ELF_VER_CHR); | |
1895 | know (p != NULL); | |
1896 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) | |
1897 | { | |
1898 | size_t l = strlen (&p[3]) + 1; | |
1899 | memmove (&p [1], &p[3], l); | |
1900 | } | |
1901 | if (symbol_used_p (symp) == 0 | |
1902 | && symbol_used_in_reloc_p (symp) == 0) | |
1903 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1904 | } | |
1905 | } | |
339681c0 L |
1906 | } |
1907 | } | |
1908 | ||
252b5132 RH |
1909 | /* It is required that we let write_relocs have the opportunity to |
1910 | optimize away fixups before output has begun, since it is possible | |
1911 | to eliminate all fixups for a section and thus we never should | |
1912 | have generated the relocation section. */ | |
1913 | ||
1914 | void | |
1915 | elf_frob_file_after_relocs () | |
1916 | { | |
1917 | #ifdef NEED_ECOFF_DEBUG | |
1918 | if (ECOFF_DEBUGGING) | |
1919 | /* Generate the ECOFF debugging information. */ | |
1920 | { | |
1921 | const struct ecoff_debug_swap *debug_swap; | |
1922 | struct ecoff_debug_info debug; | |
1923 | char *buf; | |
1924 | asection *sec; | |
1925 | ||
1926 | debug_swap | |
1927 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1928 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1929 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1930 | ||
1931 | /* Set up the pointers in debug. */ | |
1932 | #define SET(ptr, offset, type) \ | |
1933 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1934 | ||
1935 | SET (line, cbLineOffset, unsigned char *); | |
1936 | SET (external_dnr, cbDnOffset, PTR); | |
1937 | SET (external_pdr, cbPdOffset, PTR); | |
1938 | SET (external_sym, cbSymOffset, PTR); | |
1939 | SET (external_opt, cbOptOffset, PTR); | |
1940 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1941 | SET (ss, cbSsOffset, char *); | |
1942 | SET (external_fdr, cbFdOffset, PTR); | |
1943 | SET (external_rfd, cbRfdOffset, PTR); | |
1944 | /* ssext and external_ext are set up just below. */ | |
1945 | ||
1946 | #undef SET | |
1947 | ||
1948 | /* Set up the external symbols. */ | |
1949 | debug.ssext = debug.ssext_end = NULL; | |
1950 | debug.external_ext = debug.external_ext_end = NULL; | |
1951 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1952 | elf_get_extr, elf_set_index)) | |
6ce8b369 | 1953 | as_fatal (_("failed to set up debugging information: %s"), |
252b5132 RH |
1954 | bfd_errmsg (bfd_get_error ())); |
1955 | ||
1956 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1957 | assert (sec != NULL); | |
1958 | ||
1959 | know (stdoutput->output_has_begun == false); | |
1960 | ||
1961 | /* We set the size of the section, call bfd_set_section_contents | |
1962 | to force the ELF backend to allocate a file position, and then | |
1963 | write out the data. FIXME: Is this really the best way to do | |
1964 | this? */ | |
1965 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1966 | ||
5f91fe03 ILT |
1967 | /* Pass BUF to bfd_set_section_contents because this will |
1968 | eventually become a call to fwrite, and ISO C prohibits | |
1969 | passing a NULL pointer to a stdio function even if the | |
1970 | pointer will not be used. */ | |
1971 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf, | |
252b5132 | 1972 | (file_ptr) 0, (bfd_size_type) 0)) |
6ce8b369 | 1973 | as_fatal (_("can't start writing .mdebug section: %s"), |
252b5132 RH |
1974 | bfd_errmsg (bfd_get_error ())); |
1975 | ||
1976 | know (stdoutput->output_has_begun == true); | |
1977 | know (sec->filepos != 0); | |
1978 | ||
1979 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1980 | sec->filepos)) | |
6ce8b369 | 1981 | as_fatal (_("could not write .mdebug section: %s"), |
252b5132 RH |
1982 | bfd_errmsg (bfd_get_error ())); |
1983 | } | |
1984 | #endif /* NEED_ECOFF_DEBUG */ | |
1985 | } | |
1986 | ||
1987 | #ifdef SCO_ELF | |
1988 | ||
1989 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1990 | SCO specific identifier in the .notes section to satisfy the SCO | |
1991 | linker. | |
1992 | ||
1993 | This looks more complicated than it really is. As opposed to the | |
1994 | "obvious" solution, this should handle the cross dev cases | |
1995 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1996 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1997 | should be exactly one of these sections per object module. | |
1998 | ||
1999 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
2000 | .note section. | |
2001 | ||
fa306131 AM |
2002 | int_32 namesz = 4 ; Name size |
2003 | int_32 descsz = 12 ; Descriptive information | |
2004 | int_32 type = 1 ; | |
2005 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
2006 | int_32 version = (major ver # << 16) | version of tools ; |
2007 | int_32 source = (tool_id << 16 ) | 1 ; | |
2008 | int_32 info = 0 ; These are set by the SCO tools, but we | |
fa306131 | 2009 | don't know enough about the source |
252b5132 RH |
2010 | environment to set them. SCO ld currently |
2011 | ignores them, and recommends we set them | |
2012 | to zero. */ | |
2013 | ||
2014 | #define SCO_MAJOR_VERSION 0x1 | |
2015 | #define SCO_MINOR_VERSION 0x1 | |
2016 | ||
2017 | void | |
2018 | sco_id () | |
2019 | { | |
2020 | ||
2021 | char *name; | |
2022 | unsigned int c; | |
2023 | char ch; | |
2024 | char *p; | |
2025 | asection *seg = now_seg; | |
2026 | subsegT subseg = now_subseg; | |
2027 | Elf_Internal_Note i_note; | |
2028 | Elf_External_Note e_note; | |
2029 | asection *note_secp = (asection *) NULL; | |
2030 | int i, len; | |
2031 | ||
2032 | /* create the .note section */ | |
2033 | ||
2034 | note_secp = subseg_new (".note", 0); | |
2035 | bfd_set_section_flags (stdoutput, | |
2036 | note_secp, | |
2037 | SEC_HAS_CONTENTS | SEC_READONLY); | |
2038 | ||
2039 | /* process the version string */ | |
2040 | ||
fa306131 | 2041 | i_note.namesz = 4; |
252b5132 RH |
2042 | i_note.descsz = 12; /* 12 descriptive bytes */ |
2043 | i_note.type = NT_VERSION; /* Contains a version string */ | |
2044 | ||
2045 | p = frag_more (sizeof (i_note.namesz)); | |
2046 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
2047 | ||
2048 | p = frag_more (sizeof (i_note.descsz)); | |
2049 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
2050 | ||
2051 | p = frag_more (sizeof (i_note.type)); | |
2052 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
2053 | ||
2054 | p = frag_more (4); | |
fa306131 | 2055 | strcpy (p, "SCO"); |
252b5132 RH |
2056 | |
2057 | /* Note: this is the version number of the ELF we're representing */ | |
2058 | p = frag_more (4); | |
2059 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2060 | ||
2061 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2062 | it with SCO. The bottom bit shows that we are compat with the | |
2063 | SCO ABI. */ | |
2064 | p = frag_more (4); | |
2065 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2066 | ||
2067 | /* If we knew (or cared) what the source language options were, we'd | |
2068 | fill them in here. SCO has given us permission to ignore these | |
2069 | and just set them to zero. */ | |
2070 | p = frag_more (4); | |
2071 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2072 | |
252b5132 RH |
2073 | frag_align (2, 0, 0); |
2074 | ||
2075 | /* We probably can't restore the current segment, for there likely | |
2076 | isn't one yet... */ | |
2077 | if (seg && subseg) | |
2078 | subseg_set (seg, subseg); | |
2079 | ||
2080 | } | |
2081 | ||
2082 | #endif /* SCO_ELF */ | |
2083 | ||
5110c57e HPN |
2084 | static int |
2085 | elf_separate_stab_sections () | |
2086 | { | |
2087 | #ifdef NEED_ECOFF_DEBUG | |
2088 | return (!ECOFF_DEBUGGING); | |
2089 | #else | |
2090 | return 1; | |
2091 | #endif | |
2092 | } | |
2093 | ||
2094 | static void | |
2095 | elf_init_stab_section (seg) | |
2096 | segT seg; | |
2097 | { | |
2098 | #ifdef NEED_ECOFF_DEBUG | |
2099 | if (!ECOFF_DEBUGGING) | |
2100 | #endif | |
2101 | obj_elf_init_stab_section (seg); | |
2102 | } | |
2103 | ||
252b5132 RH |
2104 | const struct format_ops elf_format_ops = |
2105 | { | |
2106 | bfd_target_elf_flavour, | |
4c63da97 AM |
2107 | 0, /* dfl_leading_underscore */ |
2108 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2109 | elf_begin, |
2110 | elf_file_symbol, | |
252b5132 RH |
2111 | elf_frob_symbol, |
2112 | elf_frob_file, | |
339681c0 | 2113 | elf_frob_file_before_adjust, |
252b5132 RH |
2114 | elf_frob_file_after_relocs, |
2115 | elf_s_get_size, elf_s_set_size, | |
2116 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2117 | elf_s_get_other, |
5110c57e | 2118 | elf_s_set_other, |
4c63da97 | 2119 | 0, /* s_get_desc */ |
5110c57e HPN |
2120 | 0, /* s_set_desc */ |
2121 | 0, /* s_get_type */ | |
2122 | 0, /* s_set_type */ | |
252b5132 RH |
2123 | elf_copy_symbol_attributes, |
2124 | #ifdef NEED_ECOFF_DEBUG | |
2125 | ecoff_generate_asm_lineno, | |
2126 | ecoff_stab, | |
2127 | #else | |
4c63da97 AM |
2128 | 0, /* generate_asm_lineno */ |
2129 | 0, /* process_stab */ | |
252b5132 | 2130 | #endif |
5110c57e HPN |
2131 | elf_separate_stab_sections, |
2132 | elf_init_stab_section, | |
252b5132 RH |
2133 | elf_sec_sym_ok_for_reloc, |
2134 | elf_pop_insert, | |
2135 | #ifdef NEED_ECOFF_DEBUG | |
2136 | elf_ecoff_set_ext, | |
2137 | #else | |
4c63da97 | 2138 | 0, /* ecoff_set_ext */ |
252b5132 | 2139 | #endif |
4c63da97 | 2140 | elf_obj_read_begin_hook, |
5110c57e | 2141 | elf_obj_symbol_new_hook |
252b5132 | 2142 | }; |