Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF object file format |
f7e42eb4 | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
fa306131 | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as | |
9 | published by the Free Software Foundation; either version 2, | |
10 | or (at your option) any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | the GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
bf514e21 | 20 | 02111-1307, USA. */ |
252b5132 RH |
21 | |
22 | #define OBJ_HEADER "obj-elf.h" | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | #include "obstack.h" | |
26 | ||
27 | #ifndef ECOFF_DEBUGGING | |
28 | #define ECOFF_DEBUGGING 0 | |
29 | #else | |
30 | #define NEED_ECOFF_DEBUG | |
31 | #endif | |
32 | ||
33 | #ifdef NEED_ECOFF_DEBUG | |
34 | #include "ecoff.h" | |
35 | #endif | |
36 | ||
37 | #ifdef TC_ALPHA | |
38 | #include "elf/alpha.h" | |
39 | #endif | |
40 | ||
41 | #ifdef TC_MIPS | |
42 | #include "elf/mips.h" | |
43 | #endif | |
44 | ||
45 | #ifdef TC_PPC | |
46 | #include "elf/ppc.h" | |
47 | #endif | |
48 | ||
5b93d8bb AM |
49 | #ifdef TC_I370 |
50 | #include "elf/i370.h" | |
51 | #endif | |
52 | ||
252b5132 RH |
53 | static bfd_vma elf_s_get_size PARAMS ((symbolS *)); |
54 | static void elf_s_set_size PARAMS ((symbolS *, bfd_vma)); | |
55 | static bfd_vma elf_s_get_align PARAMS ((symbolS *)); | |
56 | static void elf_s_set_align PARAMS ((symbolS *, bfd_vma)); | |
5110c57e | 57 | static void elf_s_set_other PARAMS ((symbolS *, int)); |
252b5132 RH |
58 | static void elf_copy_symbol_attributes PARAMS ((symbolS *, symbolS *)); |
59 | static int elf_sec_sym_ok_for_reloc PARAMS ((asection *)); | |
60 | static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR)); | |
5110c57e HPN |
61 | static int elf_separate_stab_sections PARAMS ((void)); |
62 | static void elf_init_stab_section PARAMS ((segT)); | |
252b5132 RH |
63 | |
64 | #ifdef NEED_ECOFF_DEBUG | |
65 | static boolean elf_get_extr PARAMS ((asymbol *, EXTR *)); | |
66 | static void elf_set_index PARAMS ((asymbol *, bfd_size_type)); | |
67 | #endif | |
68 | ||
69 | static void obj_elf_line PARAMS ((int)); | |
70 | void obj_elf_version PARAMS ((int)); | |
71 | static void obj_elf_size PARAMS ((int)); | |
72 | static void obj_elf_type PARAMS ((int)); | |
73 | static void obj_elf_ident PARAMS ((int)); | |
74 | static void obj_elf_weak PARAMS ((int)); | |
75 | static void obj_elf_local PARAMS ((int)); | |
2e13b764 | 76 | static void obj_elf_visibility PARAMS ((int)); |
252b5132 | 77 | static void obj_elf_symver PARAMS ((int)); |
252b5132 | 78 | static void obj_elf_subsection PARAMS ((int)); |
9de8d8f1 | 79 | static void obj_elf_popsection PARAMS ((int)); |
252b5132 RH |
80 | |
81 | static const pseudo_typeS elf_pseudo_table[] = | |
82 | { | |
83 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 84 | {"common", obj_elf_common, 1}, |
252b5132 RH |
85 | {"ident", obj_elf_ident, 0}, |
86 | {"local", obj_elf_local, 0}, | |
87 | {"previous", obj_elf_previous, 0}, | |
88 | {"section", obj_elf_section, 0}, | |
89 | {"section.s", obj_elf_section, 0}, | |
90 | {"sect", obj_elf_section, 0}, | |
91 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
92 | {"pushsection", obj_elf_section, 1}, |
93 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
94 | {"size", obj_elf_size, 0}, |
95 | {"type", obj_elf_type, 0}, | |
96 | {"version", obj_elf_version, 0}, | |
97 | {"weak", obj_elf_weak, 0}, | |
98 | ||
bf514e21 | 99 | /* These define symbol visibility. */ |
2e13b764 NC |
100 | {"internal", obj_elf_visibility, STV_INTERNAL}, |
101 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
102 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
103 | ||
252b5132 RH |
104 | /* These are used for stabs-in-elf configurations. */ |
105 | {"line", obj_elf_line, 0}, | |
106 | ||
107 | /* This is a GNU extension to handle symbol versions. */ | |
108 | {"symver", obj_elf_symver, 0}, | |
109 | ||
110 | /* A GNU extension to change subsection only. */ | |
111 | {"subsection", obj_elf_subsection, 0}, | |
112 | ||
113 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
904a31bf AM |
114 | {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0}, |
115 | {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0}, | |
252b5132 | 116 | |
bf514e21 | 117 | /* These are used for dwarf. */ |
252b5132 RH |
118 | {"2byte", cons, 2}, |
119 | {"4byte", cons, 4}, | |
120 | {"8byte", cons, 8}, | |
121 | ||
122 | /* We need to trap the section changing calls to handle .previous. */ | |
123 | {"data", obj_elf_data, 0}, | |
124 | {"text", obj_elf_text, 0}, | |
125 | ||
126 | /* End sentinel. */ | |
ab9da554 | 127 | {NULL, NULL, 0}, |
252b5132 RH |
128 | }; |
129 | ||
130 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
131 | { | |
132 | #ifdef NEED_ECOFF_DEBUG | |
133 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
134 | is used instead. */ | |
135 | { "def", ecoff_directive_def, 0 }, | |
136 | { "dim", ecoff_directive_dim, 0 }, | |
137 | { "endef", ecoff_directive_endef, 0 }, | |
138 | { "file", ecoff_directive_file, 0 }, | |
139 | { "scl", ecoff_directive_scl, 0 }, | |
140 | { "tag", ecoff_directive_tag, 0 }, | |
141 | { "val", ecoff_directive_val, 0 }, | |
142 | ||
143 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
144 | already has meanings for those. We use .esize and .etype | |
145 | instead. These are only generated by gcc anyhow. */ | |
146 | { "esize", ecoff_directive_size, 0 }, | |
147 | { "etype", ecoff_directive_type, 0 }, | |
148 | ||
149 | /* ECOFF specific debugging information. */ | |
150 | { "begin", ecoff_directive_begin, 0 }, | |
151 | { "bend", ecoff_directive_bend, 0 }, | |
152 | { "end", ecoff_directive_end, 0 }, | |
153 | { "ent", ecoff_directive_ent, 0 }, | |
154 | { "fmask", ecoff_directive_fmask, 0 }, | |
155 | { "frame", ecoff_directive_frame, 0 }, | |
156 | { "loc", ecoff_directive_loc, 0 }, | |
157 | { "mask", ecoff_directive_mask, 0 }, | |
158 | ||
159 | /* Other ECOFF directives. */ | |
160 | { "extern", ecoff_directive_extern, 0 }, | |
161 | ||
162 | /* These are used on Irix. I don't know how to implement them. */ | |
163 | { "alias", s_ignore, 0 }, | |
164 | { "bgnb", s_ignore, 0 }, | |
165 | { "endb", s_ignore, 0 }, | |
166 | { "lab", s_ignore, 0 }, | |
167 | { "noalias", s_ignore, 0 }, | |
168 | { "verstamp", s_ignore, 0 }, | |
169 | { "vreg", s_ignore, 0 }, | |
170 | #endif | |
171 | ||
ab9da554 | 172 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
173 | }; |
174 | ||
175 | #undef NO_RELOC | |
176 | #include "aout/aout64.h" | |
177 | ||
178 | /* This is called when the assembler starts. */ | |
179 | ||
180 | void | |
181 | elf_begin () | |
182 | { | |
183 | /* Add symbols for the known sections to the symbol table. */ | |
184 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
185 | TEXT_SECTION_NAME))); | |
186 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
187 | DATA_SECTION_NAME))); | |
188 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
189 | BSS_SECTION_NAME))); | |
190 | } | |
191 | ||
192 | void | |
193 | elf_pop_insert () | |
194 | { | |
195 | pop_insert (elf_pseudo_table); | |
196 | if (ECOFF_DEBUGGING) | |
197 | pop_insert (ecoff_debug_pseudo_table); | |
198 | } | |
199 | ||
200 | static bfd_vma | |
201 | elf_s_get_size (sym) | |
202 | symbolS *sym; | |
203 | { | |
204 | return S_GET_SIZE (sym); | |
205 | } | |
206 | ||
207 | static void | |
208 | elf_s_set_size (sym, sz) | |
209 | symbolS *sym; | |
210 | bfd_vma sz; | |
211 | { | |
212 | S_SET_SIZE (sym, sz); | |
213 | } | |
214 | ||
215 | static bfd_vma | |
216 | elf_s_get_align (sym) | |
217 | symbolS *sym; | |
218 | { | |
219 | return S_GET_ALIGN (sym); | |
220 | } | |
221 | ||
222 | static void | |
223 | elf_s_set_align (sym, align) | |
224 | symbolS *sym; | |
225 | bfd_vma align; | |
226 | { | |
227 | S_SET_ALIGN (sym, align); | |
228 | } | |
229 | ||
4c63da97 AM |
230 | int |
231 | elf_s_get_other (sym) | |
232 | symbolS *sym; | |
233 | { | |
234 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
235 | } | |
236 | ||
5110c57e HPN |
237 | static void |
238 | elf_s_set_other (sym, other) | |
239 | symbolS *sym; | |
240 | int other; | |
241 | { | |
242 | S_SET_OTHER (sym, other); | |
243 | } | |
244 | ||
252b5132 RH |
245 | static void |
246 | elf_copy_symbol_attributes (dest, src) | |
247 | symbolS *dest, *src; | |
248 | { | |
249 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
250 | } | |
251 | ||
252 | static int | |
253 | elf_sec_sym_ok_for_reloc (sec) | |
254 | asection *sec; | |
255 | { | |
256 | return obj_sec_sym_ok_for_reloc (sec); | |
257 | } | |
258 | ||
259 | void | |
260 | elf_file_symbol (s) | |
5110c57e | 261 | const char *s; |
252b5132 RH |
262 | { |
263 | symbolS *sym; | |
264 | ||
265 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
49309057 ILT |
266 | symbol_set_frag (sym, &zero_address_frag); |
267 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 RH |
268 | |
269 | if (symbol_rootP != sym) | |
270 | { | |
271 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
272 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
273 | #ifdef DEBUG | |
274 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
275 | #endif | |
276 | } | |
277 | ||
278 | #ifdef NEED_ECOFF_DEBUG | |
279 | ecoff_new_file (s); | |
280 | #endif | |
281 | } | |
282 | ||
16b93d88 | 283 | void |
9be1cda6 AS |
284 | obj_elf_common (is_common) |
285 | int is_common; | |
252b5132 RH |
286 | { |
287 | char *name; | |
288 | char c; | |
289 | char *p; | |
290 | int temp, size; | |
291 | symbolS *symbolP; | |
292 | int have_align; | |
293 | ||
9be1cda6 AS |
294 | if (flag_mri && is_common) |
295 | { | |
296 | s_mri_common (0); | |
297 | return; | |
298 | } | |
299 | ||
252b5132 RH |
300 | name = input_line_pointer; |
301 | c = get_symbol_end (); | |
302 | /* just after name is now '\0' */ | |
303 | p = input_line_pointer; | |
304 | *p = c; | |
305 | SKIP_WHITESPACE (); | |
306 | if (*input_line_pointer != ',') | |
307 | { | |
308 | as_bad (_("Expected comma after symbol-name")); | |
309 | ignore_rest_of_line (); | |
310 | return; | |
311 | } | |
312 | input_line_pointer++; /* skip ',' */ | |
313 | if ((temp = get_absolute_expression ()) < 0) | |
314 | { | |
315 | as_bad (_(".COMMon length (%d.) <0! Ignored."), temp); | |
316 | ignore_rest_of_line (); | |
317 | return; | |
318 | } | |
319 | size = temp; | |
320 | *p = 0; | |
321 | symbolP = symbol_find_or_make (name); | |
322 | *p = c; | |
323 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
324 | { | |
325 | as_bad (_("Ignoring attempt to re-define symbol")); | |
326 | ignore_rest_of_line (); | |
327 | return; | |
328 | } | |
329 | if (S_GET_VALUE (symbolP) != 0) | |
330 | { | |
ab9da554 | 331 | if (S_GET_VALUE (symbolP) != (valueT) size) |
252b5132 RH |
332 | { |
333 | as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."), | |
334 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
335 | } | |
336 | } | |
337 | know (symbolP->sy_frag == &zero_address_frag); | |
338 | if (*input_line_pointer != ',') | |
339 | have_align = 0; | |
340 | else | |
341 | { | |
342 | have_align = 1; | |
343 | input_line_pointer++; | |
344 | SKIP_WHITESPACE (); | |
345 | } | |
346 | if (! have_align || *input_line_pointer != '"') | |
347 | { | |
348 | if (! have_align) | |
349 | temp = 0; | |
350 | else | |
351 | { | |
352 | temp = get_absolute_expression (); | |
353 | if (temp < 0) | |
354 | { | |
355 | temp = 0; | |
356 | as_warn (_("Common alignment negative; 0 assumed")); | |
357 | } | |
358 | } | |
49309057 | 359 | if (symbol_get_obj (symbolP)->local) |
252b5132 RH |
360 | { |
361 | segT old_sec; | |
362 | int old_subsec; | |
363 | char *pfrag; | |
364 | int align; | |
365 | ||
366 | /* allocate_bss: */ | |
367 | old_sec = now_seg; | |
368 | old_subsec = now_subseg; | |
369 | if (temp) | |
370 | { | |
371 | /* convert to a power of 2 alignment */ | |
372 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
373 | if (temp != 1) | |
374 | { | |
375 | as_bad (_("Common alignment not a power of 2")); | |
376 | ignore_rest_of_line (); | |
377 | return; | |
378 | } | |
379 | } | |
380 | else | |
381 | align = 0; | |
382 | record_alignment (bss_section, align); | |
383 | subseg_set (bss_section, 0); | |
384 | if (align) | |
385 | frag_align (align, 0, 0); | |
386 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
49309057 ILT |
387 | symbol_get_frag (symbolP)->fr_symbol = 0; |
388 | symbol_set_frag (symbolP, frag_now); | |
252b5132 RH |
389 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
390 | (offsetT) size, (char *) 0); | |
391 | *pfrag = 0; | |
392 | S_SET_SIZE (symbolP, size); | |
393 | S_SET_SEGMENT (symbolP, bss_section); | |
394 | S_CLEAR_EXTERNAL (symbolP); | |
395 | subseg_set (old_sec, old_subsec); | |
396 | } | |
397 | else | |
398 | { | |
399 | allocate_common: | |
400 | S_SET_VALUE (symbolP, (valueT) size); | |
401 | S_SET_ALIGN (symbolP, temp); | |
402 | S_SET_EXTERNAL (symbolP); | |
403 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
404 | } | |
405 | } | |
406 | else | |
407 | { | |
408 | input_line_pointer++; | |
409 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
410 | if (*input_line_pointer == '.') | |
411 | input_line_pointer++; | |
412 | /* @@ Some say data, some say bss. */ | |
413 | if (strncmp (input_line_pointer, "bss\"", 4) | |
414 | && strncmp (input_line_pointer, "data\"", 5)) | |
415 | { | |
416 | while (*--input_line_pointer != '"') | |
417 | ; | |
418 | input_line_pointer--; | |
419 | goto bad_common_segment; | |
420 | } | |
421 | while (*input_line_pointer++ != '"') | |
422 | ; | |
423 | goto allocate_common; | |
424 | } | |
425 | ||
49309057 | 426 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 RH |
427 | |
428 | demand_empty_rest_of_line (); | |
429 | return; | |
430 | ||
431 | { | |
432 | bad_common_segment: | |
433 | p = input_line_pointer; | |
434 | while (*p && *p != '\n') | |
435 | p++; | |
436 | c = *p; | |
437 | *p = '\0'; | |
438 | as_bad (_("bad .common segment %s"), input_line_pointer + 1); | |
439 | *p = c; | |
440 | input_line_pointer = p; | |
441 | ignore_rest_of_line (); | |
442 | return; | |
443 | } | |
444 | } | |
445 | ||
446 | static void | |
447 | obj_elf_local (ignore) | |
ab9da554 | 448 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
449 | { |
450 | char *name; | |
451 | int c; | |
452 | symbolS *symbolP; | |
453 | ||
454 | do | |
455 | { | |
456 | name = input_line_pointer; | |
457 | c = get_symbol_end (); | |
458 | symbolP = symbol_find_or_make (name); | |
459 | *input_line_pointer = c; | |
460 | SKIP_WHITESPACE (); | |
461 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 462 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
463 | if (c == ',') |
464 | { | |
465 | input_line_pointer++; | |
466 | SKIP_WHITESPACE (); | |
467 | if (*input_line_pointer == '\n') | |
468 | c = '\n'; | |
469 | } | |
470 | } | |
471 | while (c == ','); | |
472 | demand_empty_rest_of_line (); | |
473 | } | |
474 | ||
475 | static void | |
476 | obj_elf_weak (ignore) | |
ab9da554 | 477 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
478 | { |
479 | char *name; | |
480 | int c; | |
481 | symbolS *symbolP; | |
482 | ||
483 | do | |
484 | { | |
485 | name = input_line_pointer; | |
486 | c = get_symbol_end (); | |
487 | symbolP = symbol_find_or_make (name); | |
488 | *input_line_pointer = c; | |
489 | SKIP_WHITESPACE (); | |
490 | S_SET_WEAK (symbolP); | |
49309057 | 491 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
492 | if (c == ',') |
493 | { | |
494 | input_line_pointer++; | |
495 | SKIP_WHITESPACE (); | |
496 | if (*input_line_pointer == '\n') | |
497 | c = '\n'; | |
498 | } | |
499 | } | |
500 | while (c == ','); | |
501 | demand_empty_rest_of_line (); | |
502 | } | |
503 | ||
2e13b764 NC |
504 | static void |
505 | obj_elf_visibility (visibility) | |
506 | int visibility; | |
507 | { | |
508 | char *name; | |
509 | int c; | |
510 | symbolS *symbolP; | |
511 | asymbol *bfdsym; | |
512 | elf_symbol_type *elfsym; | |
513 | ||
514 | do | |
515 | { | |
516 | name = input_line_pointer; | |
517 | c = get_symbol_end (); | |
518 | symbolP = symbol_find_or_make (name); | |
519 | *input_line_pointer = c; | |
fa306131 | 520 | |
2e13b764 | 521 | SKIP_WHITESPACE (); |
fa306131 | 522 | |
2e13b764 NC |
523 | bfdsym = symbol_get_bfdsym (symbolP); |
524 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 525 | |
2e13b764 | 526 | assert (elfsym); |
fa306131 | 527 | |
2e13b764 | 528 | elfsym->internal_elf_sym.st_other = visibility; |
fa306131 | 529 | |
2e13b764 NC |
530 | if (c == ',') |
531 | { | |
532 | input_line_pointer ++; | |
fa306131 | 533 | |
2e13b764 | 534 | SKIP_WHITESPACE (); |
fa306131 | 535 | |
2e13b764 NC |
536 | if (*input_line_pointer == '\n') |
537 | c = '\n'; | |
538 | } | |
539 | } | |
540 | while (c == ','); | |
fa306131 | 541 | |
2e13b764 NC |
542 | demand_empty_rest_of_line (); |
543 | } | |
544 | ||
252b5132 RH |
545 | static segT previous_section; |
546 | static int previous_subsection; | |
547 | ||
9de8d8f1 RH |
548 | struct section_stack |
549 | { | |
550 | struct section_stack *next; | |
551 | segT seg, prev_seg; | |
552 | int subseg, prev_subseg; | |
553 | }; | |
554 | ||
555 | static struct section_stack *section_stack; | |
556 | ||
252b5132 RH |
557 | /* Handle the .section pseudo-op. This code supports two different |
558 | syntaxes. | |
559 | ||
560 | The first is found on Solaris, and looks like | |
561 | .section ".sec1",#alloc,#execinstr,#write | |
562 | Here the names after '#' are the SHF_* flags to turn on for the | |
563 | section. I'm not sure how it determines the SHT_* type (BFD | |
564 | doesn't really give us control over the type, anyhow). | |
565 | ||
566 | The second format is found on UnixWare, and probably most SVR4 | |
567 | machines, and looks like | |
568 | .section .sec1,"a",@progbits | |
569 | The quoted string may contain any combination of a, w, x, and | |
570 | represents the SHF_* flags to turn on for the section. The string | |
571 | beginning with '@' can be progbits or nobits. There should be | |
572 | other possibilities, but I don't know what they are. In any case, | |
573 | BFD doesn't really let us set the section type. */ | |
574 | ||
575 | /* Certain named sections have particular defined types, listed on p. | |
576 | 4-19 of the ABI. */ | |
577 | struct special_section | |
578 | { | |
579 | const char *name; | |
580 | int type; | |
581 | int attributes; | |
582 | }; | |
583 | ||
9de8d8f1 | 584 | static struct special_section const special_sections[] = |
252b5132 RH |
585 | { |
586 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
587 | { ".comment", SHT_PROGBITS, 0 }, | |
588 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
589 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
590 | { ".debug", SHT_PROGBITS, 0 }, | |
591 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
592 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
593 | { ".line", SHT_PROGBITS, 0 }, | |
594 | { ".note", SHT_NOTE, 0 }, | |
595 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
596 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
597 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
598 | ||
599 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
600 | ELF_TC_SPECIAL_SECTIONS | |
601 | #endif | |
602 | ||
603 | #if 0 | |
604 | /* The following section names are special, but they can not | |
605 | reasonably appear in assembler code. Some of the attributes are | |
606 | processor dependent. */ | |
607 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
608 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
609 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
610 | { ".got", SHT_PROGBITS, 0 }, | |
611 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
612 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
613 | { ".plt", SHT_PROGBITS, 0 }, | |
614 | { ".shstrtab",SHT_STRTAB, 0 }, | |
615 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
616 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
617 | #endif | |
618 | ||
619 | { NULL, 0, 0 } | |
620 | }; | |
621 | ||
622 | void | |
f5fa8ca2 | 623 | obj_elf_change_section (name, type, attr, entsize, push) |
9de8d8f1 | 624 | char *name; |
f5fa8ca2 | 625 | int type, attr, entsize, push; |
252b5132 | 626 | { |
742f45cf | 627 | asection *old_sec; |
252b5132 | 628 | segT sec; |
742f45cf AM |
629 | flagword flags; |
630 | int i; | |
252b5132 RH |
631 | |
632 | #ifdef md_flush_pending_output | |
633 | md_flush_pending_output (); | |
634 | #endif | |
635 | ||
9de8d8f1 RH |
636 | /* Switch to the section, creating it if necessary. */ |
637 | if (push) | |
638 | { | |
639 | struct section_stack *elt; | |
640 | elt = xmalloc (sizeof (struct section_stack)); | |
641 | elt->next = section_stack; | |
642 | elt->seg = now_seg; | |
643 | elt->prev_seg = previous_section; | |
644 | elt->subseg = now_subseg; | |
645 | elt->prev_subseg = previous_subsection; | |
646 | section_stack = elt; | |
647 | } | |
648 | previous_section = now_seg; | |
649 | previous_subsection = now_subseg; | |
650 | ||
742f45cf | 651 | old_sec = bfd_get_section_by_name (stdoutput, name); |
9de8d8f1 RH |
652 | sec = subseg_new (name, 0); |
653 | ||
742f45cf AM |
654 | /* See if this is one of the special sections. */ |
655 | for (i = 0; special_sections[i].name != NULL; i++) | |
656 | if (strcmp (name, special_sections[i].name) == 0) | |
657 | { | |
658 | if (type == SHT_NULL) | |
659 | type = special_sections[i].type; | |
660 | else if (type != special_sections[i].type) | |
661 | { | |
662 | if (old_sec == NULL) | |
9de8d8f1 | 663 | { |
742f45cf AM |
664 | as_warn (_("Setting incorrect section type for %s"), name); |
665 | } | |
666 | else | |
667 | { | |
668 | as_warn (_("Ignoring incorrect section type for %s"), name); | |
669 | type = special_sections[i].type; | |
9de8d8f1 | 670 | } |
9de8d8f1 | 671 | } |
742f45cf AM |
672 | if ((attr &~ special_sections[i].attributes) != 0 |
673 | && old_sec == NULL) | |
674 | { | |
675 | /* As a GNU extension, we permit a .note section to be | |
676 | allocatable. If the linker sees an allocateable .note | |
677 | section, it will create a PT_NOTE segment in the output | |
678 | file. */ | |
679 | if (strcmp (name, ".note") != 0 | |
680 | || attr != SHF_ALLOC) | |
681 | as_warn (_("Setting incorrect section attributes for %s"), | |
682 | name); | |
683 | } | |
684 | attr |= special_sections[i].attributes; | |
685 | break; | |
686 | } | |
687 | ||
688 | /* Convert ELF type and flags to BFD flags. */ | |
689 | flags = (SEC_RELOC | |
690 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
691 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
692 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
693 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
694 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
695 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)); | |
9de8d8f1 | 696 | #ifdef md_elf_section_flags |
742f45cf | 697 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
698 | #endif |
699 | ||
742f45cf AM |
700 | if (old_sec == NULL) |
701 | { | |
702 | symbolS *secsym; | |
703 | ||
9de8d8f1 RH |
704 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
705 | if (type == SHT_NOBITS) | |
706 | seg_info (sec)->bss = 1; | |
707 | ||
708 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
709 | if (flags & SEC_MERGE) |
710 | sec->entsize = entsize; | |
9de8d8f1 RH |
711 | |
712 | /* Add a symbol for this section to the symbol table. */ | |
713 | secsym = symbol_find (name); | |
714 | if (secsym != NULL) | |
715 | symbol_set_bfdsym (secsym, sec->symbol); | |
716 | else | |
717 | symbol_table_insert (section_symbol (sec)); | |
718 | } | |
742f45cf AM |
719 | else if (attr != 0) |
720 | { | |
721 | /* If section attributes are specified the second time we see a | |
722 | particular section, then check that they are the same as we | |
723 | saw the first time. */ | |
724 | if ((old_sec->flags ^ flags) | |
725 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
f5fa8ca2 | 726 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS)) |
742f45cf | 727 | as_warn (_("Ignoring changed section attributes for %s"), name); |
f5fa8ca2 JJ |
728 | else if ((flags & SEC_MERGE) && old_sec->entsize != entsize) |
729 | as_warn (_("Ignoring changed section entity size for %s"), name); | |
742f45cf | 730 | } |
9de8d8f1 RH |
731 | |
732 | #ifdef md_elf_section_change_hook | |
742f45cf | 733 | md_elf_section_change_hook (); |
9de8d8f1 RH |
734 | #endif |
735 | } | |
736 | ||
737 | int | |
738 | obj_elf_parse_section_letters (str, len) | |
739 | char *str; | |
740 | size_t len; | |
741 | { | |
742 | int attr = 0; | |
743 | ||
744 | while (len > 0) | |
745 | { | |
746 | switch (*str) | |
747 | { | |
748 | case 'a': | |
749 | attr |= SHF_ALLOC; | |
750 | break; | |
751 | case 'w': | |
752 | attr |= SHF_WRITE; | |
753 | break; | |
754 | case 'x': | |
755 | attr |= SHF_EXECINSTR; | |
756 | break; | |
f5fa8ca2 JJ |
757 | case 'm': |
758 | attr |= SHF_MERGE; | |
759 | break; | |
760 | case 's': | |
761 | attr |= SHF_STRINGS; | |
762 | break; | |
9de8d8f1 RH |
763 | default: |
764 | { | |
f5fa8ca2 | 765 | char *bad_msg = _("Unrecognized .section attribute: want a,m,s,w,x"); |
9de8d8f1 RH |
766 | #ifdef md_elf_section_letter |
767 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
768 | if (md_attr >= 0) | |
769 | attr |= md_attr; | |
770 | else | |
771 | #endif | |
772 | { | |
4c63da97 | 773 | as_warn ("%s", bad_msg); |
9de8d8f1 RH |
774 | attr = -1; |
775 | } | |
776 | } | |
777 | break; | |
778 | } | |
779 | str++, len--; | |
780 | } | |
781 | ||
782 | return attr; | |
783 | } | |
784 | ||
785 | int | |
786 | obj_elf_section_word (str, len) | |
787 | char *str; | |
788 | size_t len; | |
789 | { | |
790 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
791 | return SHF_WRITE; | |
792 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
793 | return SHF_ALLOC; | |
794 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
795 | return SHF_EXECINSTR; | |
796 | ||
797 | #ifdef md_elf_section_word | |
798 | { | |
799 | int md_attr = md_elf_section_word (str, len); | |
800 | if (md_attr >= 0) | |
801 | return md_attr; | |
802 | } | |
803 | #endif | |
804 | ||
805 | as_warn (_("Unrecognized section attribute")); | |
806 | return 0; | |
807 | } | |
808 | ||
809 | int | |
810 | obj_elf_section_type (str, len) | |
811 | char *str; | |
812 | size_t len; | |
813 | { | |
814 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
815 | return SHT_PROGBITS; | |
816 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
817 | return SHT_NOBITS; | |
818 | ||
819 | #ifdef md_elf_section_type | |
820 | { | |
821 | int md_type = md_elf_section_type (str, len); | |
822 | if (md_type >= 0) | |
823 | return md_type; | |
824 | } | |
825 | #endif | |
826 | ||
827 | as_warn (_("Unrecognized section type")); | |
828 | return 0; | |
829 | } | |
830 | ||
831 | void | |
832 | obj_elf_section (push) | |
833 | int push; | |
834 | { | |
835 | char *name, *beg, *end; | |
836 | int type, attr, dummy; | |
f5fa8ca2 | 837 | int entsize; |
9de8d8f1 | 838 | |
5b93d8bb | 839 | #ifndef TC_I370 |
252b5132 RH |
840 | if (flag_mri) |
841 | { | |
842 | char mri_type; | |
843 | ||
9de8d8f1 | 844 | #ifdef md_flush_pending_output |
60bcf0fa | 845 | md_flush_pending_output (); |
9de8d8f1 RH |
846 | #endif |
847 | ||
252b5132 RH |
848 | previous_section = now_seg; |
849 | previous_subsection = now_subseg; | |
850 | ||
851 | s_mri_sect (&mri_type); | |
852 | ||
853 | #ifdef md_elf_section_change_hook | |
854 | md_elf_section_change_hook (); | |
855 | #endif | |
856 | ||
857 | return; | |
858 | } | |
5b93d8bb | 859 | #endif /* ! defined (TC_I370) */ |
252b5132 RH |
860 | |
861 | /* Get name of section. */ | |
862 | SKIP_WHITESPACE (); | |
863 | if (*input_line_pointer == '"') | |
864 | { | |
9de8d8f1 RH |
865 | name = demand_copy_C_string (&dummy); |
866 | if (name == NULL) | |
252b5132 RH |
867 | { |
868 | ignore_rest_of_line (); | |
869 | return; | |
870 | } | |
871 | } | |
872 | else | |
873 | { | |
9de8d8f1 RH |
874 | end = input_line_pointer; |
875 | while (0 == strchr ("\n\t,; ", *end)) | |
876 | end++; | |
877 | if (end == input_line_pointer) | |
252b5132 RH |
878 | { |
879 | as_warn (_("Missing section name")); | |
880 | ignore_rest_of_line (); | |
881 | return; | |
882 | } | |
fa306131 | 883 | |
9de8d8f1 RH |
884 | name = xmalloc (end - input_line_pointer + 1); |
885 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
886 | name[end - input_line_pointer] = '\0'; | |
887 | input_line_pointer = end; | |
252b5132 | 888 | } |
252b5132 RH |
889 | SKIP_WHITESPACE (); |
890 | ||
891 | type = SHT_NULL; | |
892 | attr = 0; | |
f5fa8ca2 | 893 | entsize = 0; |
252b5132 RH |
894 | |
895 | if (*input_line_pointer == ',') | |
896 | { | |
897 | /* Skip the comma. */ | |
898 | ++input_line_pointer; | |
252b5132 RH |
899 | SKIP_WHITESPACE (); |
900 | ||
901 | if (*input_line_pointer == '"') | |
902 | { | |
9de8d8f1 RH |
903 | beg = demand_copy_C_string (&dummy); |
904 | if (beg == NULL) | |
252b5132 | 905 | { |
9de8d8f1 RH |
906 | ignore_rest_of_line (); |
907 | return; | |
252b5132 | 908 | } |
9de8d8f1 | 909 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
910 | |
911 | SKIP_WHITESPACE (); | |
912 | if (*input_line_pointer == ',') | |
913 | { | |
9de8d8f1 | 914 | char c; |
252b5132 RH |
915 | ++input_line_pointer; |
916 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
917 | c = *input_line_pointer; |
918 | if (c == '"') | |
252b5132 | 919 | { |
9de8d8f1 RH |
920 | beg = demand_copy_C_string (&dummy); |
921 | if (beg == NULL) | |
252b5132 | 922 | { |
9de8d8f1 RH |
923 | ignore_rest_of_line (); |
924 | return; | |
252b5132 | 925 | } |
9de8d8f1 | 926 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
927 | } |
928 | else if (c == '@' || c == '%') | |
929 | { | |
930 | beg = ++input_line_pointer; | |
931 | c = get_symbol_end (); | |
932 | *input_line_pointer = c; | |
933 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 RH |
934 | } |
935 | } | |
f5fa8ca2 JJ |
936 | |
937 | SKIP_WHITESPACE (); | |
938 | if ((attr & SHF_MERGE) && *input_line_pointer == ',') | |
939 | { | |
940 | ++input_line_pointer; | |
941 | SKIP_WHITESPACE (); | |
942 | entsize = get_absolute_expression (); | |
943 | if (entsize < 0) | |
944 | { | |
945 | as_warn (_("Bad .section directive - invalid merge entity size")); | |
946 | attr &= ~SHF_MERGE; | |
947 | entsize = 0; | |
948 | } | |
949 | } | |
252b5132 RH |
950 | } |
951 | else | |
952 | { | |
953 | do | |
954 | { | |
9de8d8f1 RH |
955 | char c; |
956 | ||
252b5132 RH |
957 | SKIP_WHITESPACE (); |
958 | if (*input_line_pointer != '#') | |
959 | { | |
960 | as_warn (_("Bad .section directive - character following name is not '#'")); | |
961 | ignore_rest_of_line (); | |
962 | return; | |
963 | } | |
9de8d8f1 RH |
964 | beg = ++input_line_pointer; |
965 | c = get_symbol_end (); | |
966 | *input_line_pointer = c; | |
967 | ||
968 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
969 | ||
252b5132 RH |
970 | SKIP_WHITESPACE (); |
971 | } | |
972 | while (*input_line_pointer++ == ','); | |
973 | --input_line_pointer; | |
974 | } | |
975 | } | |
976 | ||
252b5132 | 977 | demand_empty_rest_of_line (); |
9de8d8f1 | 978 | |
f5fa8ca2 JJ |
979 | if ((attr & SHF_MERGE) && entsize == 0) |
980 | { | |
981 | as_warn (_("Entity size for SHF_MERGE not specified.\nSpecify entity size as 4th argument")); | |
982 | attr &= SHF_MERGE; | |
983 | } | |
984 | ||
07e97ae2 JH |
985 | #ifdef md_elf_section_change_data_hook |
986 | md_elf_section_change_data_hook (name, type, attr, entsize, push); | |
987 | #endif | |
988 | ||
f5fa8ca2 | 989 | obj_elf_change_section (name, type, attr, entsize, push); |
252b5132 RH |
990 | } |
991 | ||
992 | /* Change to the .data section. */ | |
993 | ||
16b93d88 | 994 | void |
252b5132 RH |
995 | obj_elf_data (i) |
996 | int i; | |
997 | { | |
998 | #ifdef md_flush_pending_output | |
999 | md_flush_pending_output (); | |
1000 | #endif | |
1001 | ||
1002 | previous_section = now_seg; | |
1003 | previous_subsection = now_subseg; | |
1004 | s_data (i); | |
1005 | ||
1006 | #ifdef md_elf_section_change_hook | |
1007 | md_elf_section_change_hook (); | |
1008 | #endif | |
1009 | } | |
1010 | ||
1011 | /* Change to the .text section. */ | |
1012 | ||
16b93d88 | 1013 | void |
252b5132 RH |
1014 | obj_elf_text (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_text (i); | |
1024 | ||
1025 | #ifdef md_elf_section_change_hook | |
1026 | md_elf_section_change_hook (); | |
1027 | #endif | |
1028 | } | |
1029 | ||
1030 | static void | |
1031 | obj_elf_subsection (ignore) | |
ab9da554 | 1032 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1033 | { |
1034 | register int temp; | |
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 | ||
1043 | temp = get_absolute_expression (); | |
1044 | subseg_set (now_seg, (subsegT) temp); | |
1045 | demand_empty_rest_of_line (); | |
1046 | ||
1047 | #ifdef md_elf_section_change_hook | |
1048 | md_elf_section_change_hook (); | |
1049 | #endif | |
1050 | } | |
1051 | ||
1052 | /* This can be called from the processor backends if they change | |
1053 | sections. */ | |
1054 | ||
1055 | void | |
1056 | obj_elf_section_change_hook () | |
1057 | { | |
1058 | previous_section = now_seg; | |
1059 | previous_subsection = now_subseg; | |
1060 | } | |
1061 | ||
1062 | void | |
1063 | obj_elf_previous (ignore) | |
ab9da554 | 1064 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1065 | { |
9de8d8f1 RH |
1066 | segT new_section; |
1067 | int new_subsection; | |
1068 | ||
252b5132 RH |
1069 | if (previous_section == 0) |
1070 | { | |
1071 | as_bad (_(".previous without corresponding .section; ignored")); | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | #ifdef md_flush_pending_output | |
1076 | md_flush_pending_output (); | |
1077 | #endif | |
1078 | ||
9de8d8f1 RH |
1079 | new_section = previous_section; |
1080 | new_subsection = previous_subsection; | |
1081 | previous_section = now_seg; | |
1082 | previous_subsection = now_subseg; | |
1083 | subseg_set (new_section, new_subsection); | |
1084 | ||
1085 | #ifdef md_elf_section_change_hook | |
1086 | md_elf_section_change_hook (); | |
1087 | #endif | |
1088 | } | |
1089 | ||
1090 | static void | |
1091 | obj_elf_popsection (xxx) | |
ab9da554 | 1092 | int xxx ATTRIBUTE_UNUSED; |
9de8d8f1 RH |
1093 | { |
1094 | struct section_stack *top = section_stack; | |
1095 | ||
1096 | if (top == NULL) | |
1097 | { | |
1098 | as_bad (_(".popsection without corresponding .pushsection; ignored")); | |
1099 | return; | |
1100 | } | |
1101 | ||
1102 | #ifdef md_flush_pending_output | |
1103 | md_flush_pending_output (); | |
1104 | #endif | |
1105 | ||
1106 | section_stack = top->next; | |
1107 | previous_section = top->prev_seg; | |
1108 | previous_subsection = top->prev_subseg; | |
1109 | subseg_set (top->seg, top->subseg); | |
1110 | free (top); | |
252b5132 RH |
1111 | |
1112 | #ifdef md_elf_section_change_hook | |
1113 | md_elf_section_change_hook (); | |
1114 | #endif | |
1115 | } | |
1116 | ||
1117 | static void | |
1118 | obj_elf_line (ignore) | |
ab9da554 | 1119 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1120 | { |
1121 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1122 | delightful bug, so we are not being incompatible here. */ |
252b5132 RH |
1123 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); |
1124 | demand_empty_rest_of_line (); | |
1125 | } | |
1126 | ||
1127 | /* This handles the .symver pseudo-op, which is used to specify a | |
1128 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1129 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1130 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1131 | with the same value as the symbol NAME. */ | |
1132 | ||
1133 | static void | |
1134 | obj_elf_symver (ignore) | |
ab9da554 | 1135 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1136 | { |
1137 | char *name; | |
1138 | char c; | |
1139 | symbolS *sym; | |
1140 | ||
1141 | name = input_line_pointer; | |
1142 | c = get_symbol_end (); | |
1143 | ||
1144 | sym = symbol_find_or_make (name); | |
1145 | ||
1146 | *input_line_pointer = c; | |
1147 | ||
252b5132 RH |
1148 | SKIP_WHITESPACE (); |
1149 | if (*input_line_pointer != ',') | |
1150 | { | |
1151 | as_bad (_("expected comma after name in .symver")); | |
1152 | ignore_rest_of_line (); | |
1153 | return; | |
1154 | } | |
1155 | ||
1156 | ++input_line_pointer; | |
1157 | name = input_line_pointer; | |
1158 | while (1) | |
1159 | { | |
1160 | c = get_symbol_end (); | |
1161 | if (c != ELF_VER_CHR) | |
1162 | break; | |
1163 | *input_line_pointer++ = c; | |
1164 | } | |
1165 | ||
339681c0 L |
1166 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1167 | { | |
1168 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1169 | |
339681c0 | 1170 | *input_line_pointer = c; |
252b5132 | 1171 | |
6f620856 L |
1172 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1173 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1174 | { |
1175 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1176 | symbol_get_obj (sym)->versioned_name, | |
1177 | S_GET_NAME (sym)); | |
1178 | ignore_rest_of_line (); | |
1179 | return; | |
1180 | } | |
1181 | } | |
1182 | else | |
252b5132 | 1183 | { |
339681c0 L |
1184 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1185 | { | |
1186 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1187 | name, symbol_get_obj (sym)->versioned_name, | |
1188 | S_GET_NAME (sym)); | |
1189 | ignore_rest_of_line (); | |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | *input_line_pointer = c; | |
252b5132 RH |
1194 | } |
1195 | ||
1196 | demand_empty_rest_of_line (); | |
1197 | } | |
1198 | ||
1199 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1200 | to the linker the hierarchy in which a particular table resides. The | |
1201 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1202 | ||
904a31bf | 1203 | struct fix * |
252b5132 | 1204 | obj_elf_vtable_inherit (ignore) |
ab9da554 | 1205 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1206 | { |
1207 | char *cname, *pname; | |
1208 | symbolS *csym, *psym; | |
1209 | char c, bad = 0; | |
1210 | ||
1211 | if (*input_line_pointer == '#') | |
1212 | ++input_line_pointer; | |
1213 | ||
1214 | cname = input_line_pointer; | |
1215 | c = get_symbol_end (); | |
1216 | csym = symbol_find (cname); | |
1217 | ||
1218 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1219 | the same child symbol. Also, we can currently only do this if the | |
1220 | child symbol is already exists and is placed in a fragment. */ | |
1221 | ||
49309057 | 1222 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 RH |
1223 | { |
1224 | as_bad ("expected `%s' to have already been set for .vtable_inherit", | |
1225 | cname); | |
1226 | bad = 1; | |
1227 | } | |
1228 | ||
1229 | *input_line_pointer = c; | |
1230 | ||
1231 | SKIP_WHITESPACE (); | |
1232 | if (*input_line_pointer != ',') | |
1233 | { | |
1234 | as_bad ("expected comma after name in .vtable_inherit"); | |
1235 | ignore_rest_of_line (); | |
904a31bf | 1236 | return NULL; |
252b5132 RH |
1237 | } |
1238 | ||
1239 | ++input_line_pointer; | |
1240 | SKIP_WHITESPACE (); | |
1241 | ||
1242 | if (*input_line_pointer == '#') | |
1243 | ++input_line_pointer; | |
1244 | ||
1245 | if (input_line_pointer[0] == '0' | |
1246 | && (input_line_pointer[1] == '\0' | |
d9a62219 | 1247 | || isspace ((unsigned char) input_line_pointer[1]))) |
252b5132 RH |
1248 | { |
1249 | psym = section_symbol (absolute_section); | |
1250 | ++input_line_pointer; | |
1251 | } | |
1252 | else | |
1253 | { | |
1254 | pname = input_line_pointer; | |
1255 | c = get_symbol_end (); | |
1256 | psym = symbol_find_or_make (pname); | |
1257 | *input_line_pointer = c; | |
1258 | } | |
1259 | ||
1260 | demand_empty_rest_of_line (); | |
1261 | ||
1262 | if (bad) | |
904a31bf | 1263 | return NULL; |
252b5132 | 1264 | |
49309057 | 1265 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1266 | return fix_new (symbol_get_frag (csym), |
1267 | symbol_get_value_expression (csym)->X_add_number, | |
1268 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1269 | } |
fa306131 | 1270 | |
252b5132 RH |
1271 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1272 | to the linker that a vtable slot was used. The syntax is | |
1273 | ".vtable_entry tablename, offset". */ | |
1274 | ||
904a31bf | 1275 | struct fix * |
252b5132 | 1276 | obj_elf_vtable_entry (ignore) |
ab9da554 | 1277 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1278 | { |
1279 | char *name; | |
1280 | symbolS *sym; | |
1281 | offsetT offset; | |
1282 | char c; | |
1283 | ||
1284 | if (*input_line_pointer == '#') | |
1285 | ++input_line_pointer; | |
1286 | ||
1287 | name = input_line_pointer; | |
1288 | c = get_symbol_end (); | |
1289 | sym = symbol_find_or_make (name); | |
1290 | *input_line_pointer = c; | |
1291 | ||
1292 | SKIP_WHITESPACE (); | |
1293 | if (*input_line_pointer != ',') | |
1294 | { | |
1295 | as_bad ("expected comma after name in .vtable_entry"); | |
1296 | ignore_rest_of_line (); | |
904a31bf | 1297 | return NULL; |
252b5132 RH |
1298 | } |
1299 | ||
1300 | ++input_line_pointer; | |
1301 | if (*input_line_pointer == '#') | |
1302 | ++input_line_pointer; | |
1303 | ||
1304 | offset = get_absolute_expression (); | |
1305 | ||
252b5132 | 1306 | demand_empty_rest_of_line (); |
904a31bf AM |
1307 | |
1308 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1309 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1310 | } |
1311 | ||
1312 | void | |
4c63da97 | 1313 | elf_obj_read_begin_hook () |
252b5132 RH |
1314 | { |
1315 | #ifdef NEED_ECOFF_DEBUG | |
1316 | if (ECOFF_DEBUGGING) | |
1317 | ecoff_read_begin_hook (); | |
1318 | #endif | |
1319 | } | |
1320 | ||
1321 | void | |
4c63da97 | 1322 | elf_obj_symbol_new_hook (symbolP) |
252b5132 RH |
1323 | symbolS *symbolP; |
1324 | { | |
49309057 ILT |
1325 | struct elf_obj_sy *sy_obj; |
1326 | ||
1327 | sy_obj = symbol_get_obj (symbolP); | |
1328 | sy_obj->size = NULL; | |
1329 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1330 | |
1331 | #ifdef NEED_ECOFF_DEBUG | |
1332 | if (ECOFF_DEBUGGING) | |
1333 | ecoff_symbol_new_hook (symbolP); | |
1334 | #endif | |
1335 | } | |
1336 | ||
1337 | void | |
1338 | obj_elf_version (ignore) | |
ab9da554 | 1339 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1340 | { |
1341 | char *name; | |
1342 | unsigned int c; | |
1343 | char ch; | |
1344 | char *p; | |
1345 | asection *seg = now_seg; | |
1346 | subsegT subseg = now_subseg; | |
1347 | Elf_Internal_Note i_note; | |
1348 | Elf_External_Note e_note; | |
1349 | asection *note_secp = (asection *) NULL; | |
1350 | int i, len; | |
1351 | ||
1352 | SKIP_WHITESPACE (); | |
1353 | if (*input_line_pointer == '\"') | |
1354 | { | |
bf514e21 | 1355 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1356 | name = input_line_pointer; |
1357 | ||
1358 | while (is_a_char (c = next_char_of_string ())) | |
1359 | ; | |
1360 | c = *input_line_pointer; | |
1361 | *input_line_pointer = '\0'; | |
1362 | *(input_line_pointer - 1) = '\0'; | |
1363 | *input_line_pointer = c; | |
1364 | ||
1365 | /* create the .note section */ | |
1366 | ||
1367 | note_secp = subseg_new (".note", 0); | |
1368 | bfd_set_section_flags (stdoutput, | |
1369 | note_secp, | |
1370 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1371 | ||
1372 | /* process the version string */ | |
1373 | ||
1374 | len = strlen (name); | |
1375 | ||
1376 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ | |
1377 | i_note.descsz = 0; /* no description */ | |
1378 | i_note.type = NT_VERSION; | |
1379 | p = frag_more (sizeof (e_note.namesz)); | |
1380 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1381 | p = frag_more (sizeof (e_note.descsz)); | |
1382 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1383 | p = frag_more (sizeof (e_note.type)); | |
1384 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1385 | ||
1386 | for (i = 0; i < len; i++) | |
1387 | { | |
1388 | ch = *(name + i); | |
1389 | { | |
1390 | FRAG_APPEND_1_CHAR (ch); | |
1391 | } | |
1392 | } | |
1393 | frag_align (2, 0, 0); | |
1394 | ||
1395 | subseg_set (seg, subseg); | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | as_bad (_("Expected quoted string")); | |
1400 | } | |
1401 | demand_empty_rest_of_line (); | |
1402 | } | |
1403 | ||
1404 | static void | |
1405 | obj_elf_size (ignore) | |
ab9da554 | 1406 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1407 | { |
1408 | char *name = input_line_pointer; | |
1409 | char c = get_symbol_end (); | |
1410 | char *p; | |
1411 | expressionS exp; | |
1412 | symbolS *sym; | |
1413 | ||
1414 | p = input_line_pointer; | |
1415 | *p = c; | |
1416 | SKIP_WHITESPACE (); | |
1417 | if (*input_line_pointer != ',') | |
1418 | { | |
1419 | *p = 0; | |
1420 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1421 | *p = c; | |
1422 | ignore_rest_of_line (); | |
1423 | return; | |
1424 | } | |
1425 | input_line_pointer++; | |
1426 | expression (&exp); | |
1427 | if (exp.X_op == O_absent) | |
1428 | { | |
1429 | as_bad (_("missing expression in .size directive")); | |
1430 | exp.X_op = O_constant; | |
1431 | exp.X_add_number = 0; | |
1432 | } | |
1433 | *p = 0; | |
1434 | sym = symbol_find_or_make (name); | |
1435 | *p = c; | |
1436 | if (exp.X_op == O_constant) | |
1437 | S_SET_SIZE (sym, exp.X_add_number); | |
1438 | else | |
1439 | { | |
49309057 ILT |
1440 | symbol_get_obj (sym)->size = |
1441 | (expressionS *) xmalloc (sizeof (expressionS)); | |
1442 | *symbol_get_obj (sym)->size = exp; | |
252b5132 RH |
1443 | } |
1444 | demand_empty_rest_of_line (); | |
1445 | } | |
1446 | ||
1447 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1448 | There are five syntaxes: |
fa306131 | 1449 | |
252b5132 RH |
1450 | The first (used on Solaris) is |
1451 | .type SYM,#function | |
1452 | The second (used on UnixWare) is | |
1453 | .type SYM,@function | |
1454 | The third (reportedly to be used on Irix 6.0) is | |
1455 | .type SYM STT_FUNC | |
1456 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1457 | .type SYM,%function | |
aa8c34c3 JE |
1458 | The fifth (used on SVR4/860) is |
1459 | .type SYM,"function" | |
252b5132 RH |
1460 | */ |
1461 | ||
1462 | static void | |
1463 | obj_elf_type (ignore) | |
ab9da554 | 1464 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1465 | { |
1466 | char *name; | |
1467 | char c; | |
1468 | int type; | |
1469 | const char *typename; | |
1470 | symbolS *sym; | |
904a31bf | 1471 | elf_symbol_type *elfsym; |
252b5132 RH |
1472 | |
1473 | name = input_line_pointer; | |
1474 | c = get_symbol_end (); | |
1475 | sym = symbol_find_or_make (name); | |
904a31bf | 1476 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1477 | *input_line_pointer = c; |
1478 | ||
1479 | SKIP_WHITESPACE (); | |
1480 | if (*input_line_pointer == ',') | |
1481 | ++input_line_pointer; | |
1482 | ||
1483 | SKIP_WHITESPACE (); | |
1484 | if ( *input_line_pointer == '#' | |
1485 | || *input_line_pointer == '@' | |
aa8c34c3 | 1486 | || *input_line_pointer == '"' |
252b5132 RH |
1487 | || *input_line_pointer == '%') |
1488 | ++input_line_pointer; | |
1489 | ||
1490 | typename = input_line_pointer; | |
1491 | c = get_symbol_end (); | |
1492 | ||
1493 | type = 0; | |
1494 | if (strcmp (typename, "function") == 0 | |
1495 | || strcmp (typename, "STT_FUNC") == 0) | |
1496 | type = BSF_FUNCTION; | |
1497 | else if (strcmp (typename, "object") == 0 | |
1498 | || strcmp (typename, "STT_OBJECT") == 0) | |
1499 | type = BSF_OBJECT; | |
904a31bf AM |
1500 | #ifdef md_elf_symbol_type |
1501 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1502 | ; | |
1503 | #endif | |
252b5132 RH |
1504 | else |
1505 | as_bad (_("ignoring unrecognized symbol type \"%s\""), typename); | |
1506 | ||
1507 | *input_line_pointer = c; | |
1508 | ||
aa8c34c3 JE |
1509 | if (*input_line_pointer == '"') |
1510 | ++input_line_pointer; | |
1511 | ||
904a31bf | 1512 | elfsym->symbol.flags |= type; |
252b5132 RH |
1513 | |
1514 | demand_empty_rest_of_line (); | |
1515 | } | |
1516 | ||
1517 | static void | |
1518 | obj_elf_ident (ignore) | |
ab9da554 | 1519 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1520 | { |
1521 | static segT comment_section; | |
1522 | segT old_section = now_seg; | |
1523 | int old_subsection = now_subseg; | |
1524 | ||
5f91fe03 ILT |
1525 | #ifdef md_flush_pending_output |
1526 | md_flush_pending_output (); | |
1527 | #endif | |
1528 | ||
252b5132 RH |
1529 | if (!comment_section) |
1530 | { | |
1531 | char *p; | |
1532 | comment_section = subseg_new (".comment", 0); | |
1533 | bfd_set_section_flags (stdoutput, comment_section, | |
1534 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1535 | p = frag_more (1); | |
1536 | *p = 0; | |
1537 | } | |
1538 | else | |
1539 | subseg_set (comment_section, 0); | |
1540 | stringer (1); | |
1541 | subseg_set (old_section, old_subsection); | |
1542 | } | |
1543 | ||
1544 | #ifdef INIT_STAB_SECTION | |
1545 | ||
1546 | /* The first entry in a .stabs section is special. */ | |
1547 | ||
1548 | void | |
1549 | obj_elf_init_stab_section (seg) | |
1550 | segT seg; | |
1551 | { | |
1552 | char *file; | |
1553 | char *p; | |
1554 | char *stabstr_name; | |
1555 | unsigned int stroff; | |
1556 | ||
1557 | /* Force the section to align to a longword boundary. Without this, | |
1558 | UnixWare ar crashes. */ | |
1559 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1560 | ||
bf514e21 | 1561 | /* Make space for this first symbol. */ |
252b5132 | 1562 | p = frag_more (12); |
bf514e21 | 1563 | /* Zero it out. */ |
252b5132 RH |
1564 | memset (p, 0, 12); |
1565 | as_where (&file, (unsigned int *) NULL); | |
1566 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); | |
1567 | strcpy (stabstr_name, segment_name (seg)); | |
1568 | strcat (stabstr_name, "str"); | |
1569 | stroff = get_stab_string_offset (file, stabstr_name); | |
1570 | know (stroff == 1); | |
1571 | md_number_to_chars (p, stroff, 4); | |
1572 | seg_info (seg)->stabu.p = p; | |
1573 | } | |
1574 | ||
1575 | #endif | |
1576 | ||
1577 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1578 | ||
1579 | static void | |
1580 | adjust_stab_sections (abfd, sec, xxx) | |
1581 | bfd *abfd; | |
1582 | asection *sec; | |
ab9da554 | 1583 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1584 | { |
1585 | char *name; | |
1586 | asection *strsec; | |
1587 | char *p; | |
1588 | int strsz, nsyms; | |
1589 | ||
1590 | if (strncmp (".stab", sec->name, 5)) | |
1591 | return; | |
1592 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1593 | return; | |
1594 | ||
1595 | name = (char *) alloca (strlen (sec->name) + 4); | |
1596 | strcpy (name, sec->name); | |
1597 | strcat (name, "str"); | |
1598 | strsec = bfd_get_section_by_name (abfd, name); | |
1599 | if (strsec) | |
1600 | strsz = bfd_section_size (abfd, strsec); | |
1601 | else | |
1602 | strsz = 0; | |
1603 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1604 | ||
1605 | p = seg_info (sec)->stabu.p; | |
1606 | assert (p != 0); | |
1607 | ||
1608 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); | |
1609 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
1610 | } | |
1611 | ||
1612 | #ifdef NEED_ECOFF_DEBUG | |
1613 | ||
1614 | /* This function is called by the ECOFF code. It is supposed to | |
1615 | record the external symbol information so that the backend can | |
1616 | write it out correctly. The ELF backend doesn't actually handle | |
1617 | this at the moment, so we do it ourselves. We save the information | |
1618 | in the symbol. */ | |
1619 | ||
1620 | void | |
1621 | elf_ecoff_set_ext (sym, ext) | |
1622 | symbolS *sym; | |
1623 | struct ecoff_extr *ext; | |
1624 | { | |
49309057 | 1625 | symbol_get_bfdsym (sym)->udata.p = (PTR) ext; |
252b5132 RH |
1626 | } |
1627 | ||
1628 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1629 | supposed to *EXT to the external symbol information, and return | |
1630 | whether the symbol should be used at all. */ | |
1631 | ||
1632 | static boolean | |
1633 | elf_get_extr (sym, ext) | |
1634 | asymbol *sym; | |
1635 | EXTR *ext; | |
1636 | { | |
1637 | if (sym->udata.p == NULL) | |
1638 | return false; | |
1639 | *ext = *(EXTR *) sym->udata.p; | |
1640 | return true; | |
1641 | } | |
1642 | ||
1643 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1644 | nothing to do for ELF. */ | |
1645 | ||
1646 | /*ARGSUSED*/ | |
1647 | static void | |
1648 | elf_set_index (sym, indx) | |
5f91fe03 ILT |
1649 | asymbol *sym ATTRIBUTE_UNUSED; |
1650 | bfd_size_type indx ATTRIBUTE_UNUSED; | |
252b5132 RH |
1651 | { |
1652 | } | |
1653 | ||
1654 | #endif /* NEED_ECOFF_DEBUG */ | |
1655 | ||
1656 | void | |
1657 | elf_frob_symbol (symp, puntp) | |
1658 | symbolS *symp; | |
1659 | int *puntp; | |
1660 | { | |
49309057 ILT |
1661 | struct elf_obj_sy *sy_obj; |
1662 | ||
252b5132 RH |
1663 | #ifdef NEED_ECOFF_DEBUG |
1664 | if (ECOFF_DEBUGGING) | |
1665 | ecoff_frob_symbol (symp); | |
1666 | #endif | |
1667 | ||
49309057 ILT |
1668 | sy_obj = symbol_get_obj (symp); |
1669 | ||
1670 | if (sy_obj->size != NULL) | |
252b5132 | 1671 | { |
49309057 | 1672 | switch (sy_obj->size->X_op) |
252b5132 RH |
1673 | { |
1674 | case O_subtract: | |
1675 | S_SET_SIZE (symp, | |
49309057 ILT |
1676 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1677 | + sy_obj->size->X_add_number | |
1678 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1679 | break; |
1680 | case O_constant: | |
1681 | S_SET_SIZE (symp, | |
49309057 ILT |
1682 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1683 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1684 | break; |
1685 | default: | |
1686 | as_bad (_(".size expression too complicated to fix up")); | |
1687 | break; | |
1688 | } | |
49309057 ILT |
1689 | free (sy_obj->size); |
1690 | sy_obj->size = NULL; | |
252b5132 RH |
1691 | } |
1692 | ||
49309057 | 1693 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1694 | { |
79082ff0 L |
1695 | char *p; |
1696 | ||
1697 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1698 | know (p != NULL); | |
1699 | ||
252b5132 RH |
1700 | /* This symbol was given a new name with the .symver directive. |
1701 | ||
1702 | If this is an external reference, just rename the symbol to | |
1703 | include the version string. This will make the relocs be | |
1704 | against the correct versioned symbol. | |
1705 | ||
1706 | If this is a definition, add an alias. FIXME: Using an alias | |
1707 | will permit the debugging information to refer to the right | |
1708 | symbol. However, it's not clear whether it is the best | |
1709 | approach. */ | |
1710 | ||
1711 | if (! S_IS_DEFINED (symp)) | |
1712 | { | |
252b5132 RH |
1713 | /* Verify that the name isn't using the @@ syntax--this is |
1714 | reserved for definitions of the default version to link | |
1715 | against. */ | |
252b5132 RH |
1716 | if (p[1] == ELF_VER_CHR) |
1717 | { | |
1718 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1719 | sy_obj->versioned_name); |
252b5132 RH |
1720 | *puntp = true; |
1721 | } | |
49309057 | 1722 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1723 | } |
1724 | else | |
1725 | { | |
79082ff0 L |
1726 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) |
1727 | { | |
1728 | size_t l; | |
1729 | ||
1730 | /* The @@@ syntax is a special case. It renames the | |
1731 | symbol name to versioned_name with one `@' removed. */ | |
1732 | l = strlen (&p[3]) + 1; | |
1733 | memmove (&p [2], &p[3], l); | |
1734 | S_SET_NAME (symp, sy_obj->versioned_name); | |
1735 | } | |
1736 | else | |
1737 | { | |
1738 | symbolS *symp2; | |
252b5132 | 1739 | |
79082ff0 L |
1740 | /* FIXME: Creating a new symbol here is risky. We're |
1741 | in the final loop over the symbol table. We can | |
1742 | get away with it only because the symbol goes to | |
1743 | the end of the list, where the loop will still see | |
1744 | it. It would probably be better to do this in | |
1745 | obj_frob_file_before_adjust. */ | |
252b5132 | 1746 | |
79082ff0 | 1747 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1748 | |
79082ff0 | 1749 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1750 | |
79082ff0 | 1751 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1752 | |
79082ff0 L |
1753 | /* Subtracting out the frag address here is a hack |
1754 | because we are in the middle of the final loop. */ | |
1755 | S_SET_VALUE (symp2, | |
1756 | (S_GET_VALUE (symp) | |
1757 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1758 | |
79082ff0 | 1759 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1760 | |
79082ff0 L |
1761 | /* This will copy over the size information. */ |
1762 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1763 | |
79082ff0 L |
1764 | if (S_IS_WEAK (symp)) |
1765 | S_SET_WEAK (symp2); | |
252b5132 | 1766 | |
79082ff0 L |
1767 | if (S_IS_EXTERNAL (symp)) |
1768 | S_SET_EXTERNAL (symp2); | |
1769 | } | |
252b5132 RH |
1770 | } |
1771 | } | |
1772 | ||
1773 | /* Double check weak symbols. */ | |
49309057 | 1774 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1775 | { |
1776 | if (S_IS_COMMON (symp)) | |
1777 | as_bad (_("Symbol `%s' can not be both weak and common"), | |
1778 | S_GET_NAME (symp)); | |
1779 | } | |
1780 | ||
1781 | #ifdef TC_MIPS | |
1782 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1783 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1784 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1785 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1786 | because that is the only time gcc will generate the necessary | |
1787 | .global directives to mark functions. */ | |
1788 | ||
1789 | if (S_IS_COMMON (symp)) | |
49309057 | 1790 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1791 | |
1792 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1793 | && ! S_IS_DEFINED (symp) |
1794 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1795 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 RH |
1796 | #endif |
1797 | ||
c5e54cc2 ILT |
1798 | #if 0 /* TC_PPC */ |
1799 | /* If TC_PPC is defined, we used to force the type of a symbol to be | |
1800 | BSF_OBJECT if it was otherwise unset. This was required by some | |
1801 | version of VxWorks. Thomas de Lellis <tdel@windriver.com> says | |
1802 | that this is no longer needed, so it is now commented out. */ | |
49309057 ILT |
1803 | if ((symbol_get_bfdsym (symp)->flags |
1804 | & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 | |
252b5132 | 1805 | && S_IS_DEFINED (symp)) |
49309057 | 1806 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1807 | #endif |
1808 | } | |
1809 | ||
1810 | void | |
1811 | elf_frob_file () | |
1812 | { | |
1813 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); | |
1814 | ||
1815 | #ifdef elf_tc_final_processing | |
1816 | elf_tc_final_processing (); | |
1817 | #endif | |
1818 | } | |
1819 | ||
4a1805b1 | 1820 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
1821 | |
1822 | void | |
1823 | elf_frob_file_before_adjust () | |
1824 | { | |
1825 | if (symbol_rootP) | |
1826 | { | |
1827 | symbolS *symp; | |
1828 | ||
1829 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
79082ff0 L |
1830 | if (symbol_get_obj (symp)->versioned_name) |
1831 | { | |
1832 | if (!S_IS_DEFINED (symp)) | |
1833 | { | |
1834 | char *p; | |
1835 | ||
1836 | /* The @@@ syntax is a special case. If the symbol is | |
1837 | not defined, 2 `@'s will be removed from the | |
1838 | versioned_name. */ | |
1839 | ||
1840 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
1841 | ELF_VER_CHR); | |
1842 | know (p != NULL); | |
1843 | if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR) | |
1844 | { | |
1845 | size_t l = strlen (&p[3]) + 1; | |
1846 | memmove (&p [1], &p[3], l); | |
1847 | } | |
1848 | if (symbol_used_p (symp) == 0 | |
1849 | && symbol_used_in_reloc_p (symp) == 0) | |
1850 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1851 | } | |
1852 | } | |
339681c0 L |
1853 | } |
1854 | } | |
1855 | ||
252b5132 RH |
1856 | /* It is required that we let write_relocs have the opportunity to |
1857 | optimize away fixups before output has begun, since it is possible | |
1858 | to eliminate all fixups for a section and thus we never should | |
1859 | have generated the relocation section. */ | |
1860 | ||
1861 | void | |
1862 | elf_frob_file_after_relocs () | |
1863 | { | |
1864 | #ifdef NEED_ECOFF_DEBUG | |
1865 | if (ECOFF_DEBUGGING) | |
1866 | /* Generate the ECOFF debugging information. */ | |
1867 | { | |
1868 | const struct ecoff_debug_swap *debug_swap; | |
1869 | struct ecoff_debug_info debug; | |
1870 | char *buf; | |
1871 | asection *sec; | |
1872 | ||
1873 | debug_swap | |
1874 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1875 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1876 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
1877 | ||
1878 | /* Set up the pointers in debug. */ | |
1879 | #define SET(ptr, offset, type) \ | |
1880 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1881 | ||
1882 | SET (line, cbLineOffset, unsigned char *); | |
1883 | SET (external_dnr, cbDnOffset, PTR); | |
1884 | SET (external_pdr, cbPdOffset, PTR); | |
1885 | SET (external_sym, cbSymOffset, PTR); | |
1886 | SET (external_opt, cbOptOffset, PTR); | |
1887 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1888 | SET (ss, cbSsOffset, char *); | |
1889 | SET (external_fdr, cbFdOffset, PTR); | |
1890 | SET (external_rfd, cbRfdOffset, PTR); | |
1891 | /* ssext and external_ext are set up just below. */ | |
1892 | ||
1893 | #undef SET | |
1894 | ||
1895 | /* Set up the external symbols. */ | |
1896 | debug.ssext = debug.ssext_end = NULL; | |
1897 | debug.external_ext = debug.external_ext_end = NULL; | |
1898 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1899 | elf_get_extr, elf_set_index)) | |
1900 | as_fatal (_("Failed to set up debugging information: %s"), | |
1901 | bfd_errmsg (bfd_get_error ())); | |
1902 | ||
1903 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1904 | assert (sec != NULL); | |
1905 | ||
1906 | know (stdoutput->output_has_begun == false); | |
1907 | ||
1908 | /* We set the size of the section, call bfd_set_section_contents | |
1909 | to force the ELF backend to allocate a file position, and then | |
1910 | write out the data. FIXME: Is this really the best way to do | |
1911 | this? */ | |
1912 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1913 | ||
5f91fe03 ILT |
1914 | /* Pass BUF to bfd_set_section_contents because this will |
1915 | eventually become a call to fwrite, and ISO C prohibits | |
1916 | passing a NULL pointer to a stdio function even if the | |
1917 | pointer will not be used. */ | |
1918 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf, | |
252b5132 RH |
1919 | (file_ptr) 0, (bfd_size_type) 0)) |
1920 | as_fatal (_("Can't start writing .mdebug section: %s"), | |
1921 | bfd_errmsg (bfd_get_error ())); | |
1922 | ||
1923 | know (stdoutput->output_has_begun == true); | |
1924 | know (sec->filepos != 0); | |
1925 | ||
1926 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1927 | sec->filepos)) | |
1928 | as_fatal (_("Could not write .mdebug section: %s"), | |
1929 | bfd_errmsg (bfd_get_error ())); | |
1930 | } | |
1931 | #endif /* NEED_ECOFF_DEBUG */ | |
1932 | } | |
1933 | ||
1934 | #ifdef SCO_ELF | |
1935 | ||
1936 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1937 | SCO specific identifier in the .notes section to satisfy the SCO | |
1938 | linker. | |
1939 | ||
1940 | This looks more complicated than it really is. As opposed to the | |
1941 | "obvious" solution, this should handle the cross dev cases | |
1942 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1943 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1944 | should be exactly one of these sections per object module. | |
1945 | ||
1946 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
1947 | .note section. | |
1948 | ||
fa306131 AM |
1949 | int_32 namesz = 4 ; Name size |
1950 | int_32 descsz = 12 ; Descriptive information | |
1951 | int_32 type = 1 ; | |
1952 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
1953 | int_32 version = (major ver # << 16) | version of tools ; |
1954 | int_32 source = (tool_id << 16 ) | 1 ; | |
1955 | int_32 info = 0 ; These are set by the SCO tools, but we | |
fa306131 | 1956 | don't know enough about the source |
252b5132 RH |
1957 | environment to set them. SCO ld currently |
1958 | ignores them, and recommends we set them | |
1959 | to zero. */ | |
1960 | ||
1961 | #define SCO_MAJOR_VERSION 0x1 | |
1962 | #define SCO_MINOR_VERSION 0x1 | |
1963 | ||
1964 | void | |
1965 | sco_id () | |
1966 | { | |
1967 | ||
1968 | char *name; | |
1969 | unsigned int c; | |
1970 | char ch; | |
1971 | char *p; | |
1972 | asection *seg = now_seg; | |
1973 | subsegT subseg = now_subseg; | |
1974 | Elf_Internal_Note i_note; | |
1975 | Elf_External_Note e_note; | |
1976 | asection *note_secp = (asection *) NULL; | |
1977 | int i, len; | |
1978 | ||
1979 | /* create the .note section */ | |
1980 | ||
1981 | note_secp = subseg_new (".note", 0); | |
1982 | bfd_set_section_flags (stdoutput, | |
1983 | note_secp, | |
1984 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1985 | ||
1986 | /* process the version string */ | |
1987 | ||
fa306131 | 1988 | i_note.namesz = 4; |
252b5132 RH |
1989 | i_note.descsz = 12; /* 12 descriptive bytes */ |
1990 | i_note.type = NT_VERSION; /* Contains a version string */ | |
1991 | ||
1992 | p = frag_more (sizeof (i_note.namesz)); | |
1993 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1994 | ||
1995 | p = frag_more (sizeof (i_note.descsz)); | |
1996 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1997 | ||
1998 | p = frag_more (sizeof (i_note.type)); | |
1999 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
2000 | ||
2001 | p = frag_more (4); | |
fa306131 | 2002 | strcpy (p, "SCO"); |
252b5132 RH |
2003 | |
2004 | /* Note: this is the version number of the ELF we're representing */ | |
2005 | p = frag_more (4); | |
2006 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2007 | ||
2008 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2009 | it with SCO. The bottom bit shows that we are compat with the | |
2010 | SCO ABI. */ | |
2011 | p = frag_more (4); | |
2012 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2013 | ||
2014 | /* If we knew (or cared) what the source language options were, we'd | |
2015 | fill them in here. SCO has given us permission to ignore these | |
2016 | and just set them to zero. */ | |
2017 | p = frag_more (4); | |
2018 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2019 | |
252b5132 RH |
2020 | frag_align (2, 0, 0); |
2021 | ||
2022 | /* We probably can't restore the current segment, for there likely | |
2023 | isn't one yet... */ | |
2024 | if (seg && subseg) | |
2025 | subseg_set (seg, subseg); | |
2026 | ||
2027 | } | |
2028 | ||
2029 | #endif /* SCO_ELF */ | |
2030 | ||
5110c57e HPN |
2031 | static int |
2032 | elf_separate_stab_sections () | |
2033 | { | |
2034 | #ifdef NEED_ECOFF_DEBUG | |
2035 | return (!ECOFF_DEBUGGING); | |
2036 | #else | |
2037 | return 1; | |
2038 | #endif | |
2039 | } | |
2040 | ||
2041 | static void | |
2042 | elf_init_stab_section (seg) | |
2043 | segT seg; | |
2044 | { | |
2045 | #ifdef NEED_ECOFF_DEBUG | |
2046 | if (!ECOFF_DEBUGGING) | |
2047 | #endif | |
2048 | obj_elf_init_stab_section (seg); | |
2049 | } | |
2050 | ||
252b5132 RH |
2051 | const struct format_ops elf_format_ops = |
2052 | { | |
2053 | bfd_target_elf_flavour, | |
4c63da97 AM |
2054 | 0, /* dfl_leading_underscore */ |
2055 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2056 | elf_begin, |
2057 | elf_file_symbol, | |
252b5132 RH |
2058 | elf_frob_symbol, |
2059 | elf_frob_file, | |
339681c0 | 2060 | elf_frob_file_before_adjust, |
252b5132 RH |
2061 | elf_frob_file_after_relocs, |
2062 | elf_s_get_size, elf_s_set_size, | |
2063 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2064 | elf_s_get_other, |
5110c57e | 2065 | elf_s_set_other, |
4c63da97 | 2066 | 0, /* s_get_desc */ |
5110c57e HPN |
2067 | 0, /* s_set_desc */ |
2068 | 0, /* s_get_type */ | |
2069 | 0, /* s_set_type */ | |
252b5132 RH |
2070 | elf_copy_symbol_attributes, |
2071 | #ifdef NEED_ECOFF_DEBUG | |
2072 | ecoff_generate_asm_lineno, | |
2073 | ecoff_stab, | |
2074 | #else | |
4c63da97 AM |
2075 | 0, /* generate_asm_lineno */ |
2076 | 0, /* process_stab */ | |
252b5132 | 2077 | #endif |
5110c57e HPN |
2078 | elf_separate_stab_sections, |
2079 | elf_init_stab_section, | |
252b5132 RH |
2080 | elf_sec_sym_ok_for_reloc, |
2081 | elf_pop_insert, | |
2082 | #ifdef NEED_ECOFF_DEBUG | |
2083 | elf_ecoff_set_ext, | |
2084 | #else | |
4c63da97 | 2085 | 0, /* ecoff_set_ext */ |
252b5132 | 2086 | #endif |
4c63da97 | 2087 | elf_obj_read_begin_hook, |
5110c57e | 2088 | elf_obj_symbol_new_hook |
252b5132 | 2089 | }; |