Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF object file format |
cc8a6dd0 | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
ae4a729b AM |
3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
4 | Free Software Foundation, Inc. | |
252b5132 RH |
5 | |
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as | |
ec2655a6 | 10 | published by the Free Software Foundation; either version 3, |
252b5132 RH |
11 | or (at your option) any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
16 | the GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 RH |
22 | |
23 | #define OBJ_HEADER "obj-elf.h" | |
24 | #include "as.h" | |
3882b010 | 25 | #include "safe-ctype.h" |
252b5132 RH |
26 | #include "subsegs.h" |
27 | #include "obstack.h" | |
9758f3fc | 28 | #include "struc-symbol.h" |
87ccc1b0 | 29 | #include "dwarf2dbg.h" |
252b5132 RH |
30 | |
31 | #ifndef ECOFF_DEBUGGING | |
32 | #define ECOFF_DEBUGGING 0 | |
33 | #else | |
34 | #define NEED_ECOFF_DEBUG | |
35 | #endif | |
36 | ||
37 | #ifdef NEED_ECOFF_DEBUG | |
38 | #include "ecoff.h" | |
39 | #endif | |
40 | ||
41 | #ifdef TC_ALPHA | |
42 | #include "elf/alpha.h" | |
43 | #endif | |
44 | ||
45 | #ifdef TC_MIPS | |
46 | #include "elf/mips.h" | |
47 | #endif | |
48 | ||
49 | #ifdef TC_PPC | |
50 | #include "elf/ppc.h" | |
51 | #endif | |
52 | ||
5b93d8bb AM |
53 | #ifdef TC_I370 |
54 | #include "elf/i370.h" | |
55 | #endif | |
56 | ||
3b22753a L |
57 | #ifdef TC_I386 |
58 | #include "elf/x86-64.h" | |
59 | #endif | |
60 | ||
280d71bf DB |
61 | #ifdef TC_MEP |
62 | #include "elf/mep.h" | |
63 | #endif | |
64 | ||
dbe2df79 AM |
65 | static void obj_elf_line (int); |
66 | static void obj_elf_size (int); | |
67 | static void obj_elf_type (int); | |
68 | static void obj_elf_ident (int); | |
69 | static void obj_elf_weak (int); | |
70 | static void obj_elf_local (int); | |
71 | static void obj_elf_visibility (int); | |
72 | static void obj_elf_symver (int); | |
73 | static void obj_elf_subsection (int); | |
74 | static void obj_elf_popsection (int); | |
75 | static void obj_elf_tls_common (int); | |
13c56984 | 76 | static void obj_elf_lcomm (int); |
8fe53b44 | 77 | static void obj_elf_struct (int); |
252b5132 RH |
78 | |
79 | static const pseudo_typeS elf_pseudo_table[] = | |
80 | { | |
81 | {"comm", obj_elf_common, 0}, | |
9be1cda6 | 82 | {"common", obj_elf_common, 1}, |
252b5132 | 83 | {"ident", obj_elf_ident, 0}, |
13c56984 | 84 | {"lcomm", obj_elf_lcomm, 0}, |
252b5132 RH |
85 | {"local", obj_elf_local, 0}, |
86 | {"previous", obj_elf_previous, 0}, | |
87 | {"section", obj_elf_section, 0}, | |
88 | {"section.s", obj_elf_section, 0}, | |
89 | {"sect", obj_elf_section, 0}, | |
90 | {"sect.s", obj_elf_section, 0}, | |
9de8d8f1 RH |
91 | {"pushsection", obj_elf_section, 1}, |
92 | {"popsection", obj_elf_popsection, 0}, | |
252b5132 RH |
93 | {"size", obj_elf_size, 0}, |
94 | {"type", obj_elf_type, 0}, | |
95 | {"version", obj_elf_version, 0}, | |
96 | {"weak", obj_elf_weak, 0}, | |
97 | ||
bf514e21 | 98 | /* These define symbol visibility. */ |
2e13b764 NC |
99 | {"internal", obj_elf_visibility, STV_INTERNAL}, |
100 | {"hidden", obj_elf_visibility, STV_HIDDEN}, | |
101 | {"protected", obj_elf_visibility, STV_PROTECTED}, | |
102 | ||
252b5132 RH |
103 | /* These are used for stabs-in-elf configurations. */ |
104 | {"line", obj_elf_line, 0}, | |
105 | ||
106 | /* This is a GNU extension to handle symbol versions. */ | |
107 | {"symver", obj_elf_symver, 0}, | |
108 | ||
109 | /* A GNU extension to change subsection only. */ | |
110 | {"subsection", obj_elf_subsection, 0}, | |
111 | ||
112 | /* These are GNU extensions to aid in garbage collecting C++ vtables. */ | |
dbe2df79 AM |
113 | {"vtable_inherit", (void (*) (int)) &obj_elf_vtable_inherit, 0}, |
114 | {"vtable_entry", (void (*) (int)) &obj_elf_vtable_entry, 0}, | |
252b5132 | 115 | |
bf514e21 | 116 | /* These are used for dwarf. */ |
252b5132 RH |
117 | {"2byte", cons, 2}, |
118 | {"4byte", cons, 4}, | |
119 | {"8byte", cons, 8}, | |
87ccc1b0 | 120 | /* These are used for dwarf2. */ |
dbe2df79 | 121 | { "file", (void (*) (int)) dwarf2_directive_file, 0 }, |
87ccc1b0 | 122 | { "loc", dwarf2_directive_loc, 0 }, |
07a53e5c | 123 | { "loc_mark_labels", dwarf2_directive_loc_mark_labels, 0 }, |
252b5132 RH |
124 | |
125 | /* We need to trap the section changing calls to handle .previous. */ | |
126 | {"data", obj_elf_data, 0}, | |
8fe53b44 JB |
127 | {"offset", obj_elf_struct, 0}, |
128 | {"struct", obj_elf_struct, 0}, | |
252b5132 RH |
129 | {"text", obj_elf_text, 0}, |
130 | ||
13ae64f3 JJ |
131 | {"tls_common", obj_elf_tls_common, 0}, |
132 | ||
252b5132 | 133 | /* End sentinel. */ |
ab9da554 | 134 | {NULL, NULL, 0}, |
252b5132 RH |
135 | }; |
136 | ||
137 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
138 | { | |
139 | #ifdef NEED_ECOFF_DEBUG | |
140 | /* COFF style debugging information for ECOFF. .ln is not used; .loc | |
141 | is used instead. */ | |
142 | { "def", ecoff_directive_def, 0 }, | |
143 | { "dim", ecoff_directive_dim, 0 }, | |
144 | { "endef", ecoff_directive_endef, 0 }, | |
145 | { "file", ecoff_directive_file, 0 }, | |
146 | { "scl", ecoff_directive_scl, 0 }, | |
147 | { "tag", ecoff_directive_tag, 0 }, | |
148 | { "val", ecoff_directive_val, 0 }, | |
149 | ||
150 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
151 | already has meanings for those. We use .esize and .etype | |
152 | instead. These are only generated by gcc anyhow. */ | |
153 | { "esize", ecoff_directive_size, 0 }, | |
154 | { "etype", ecoff_directive_type, 0 }, | |
155 | ||
156 | /* ECOFF specific debugging information. */ | |
157 | { "begin", ecoff_directive_begin, 0 }, | |
158 | { "bend", ecoff_directive_bend, 0 }, | |
159 | { "end", ecoff_directive_end, 0 }, | |
160 | { "ent", ecoff_directive_ent, 0 }, | |
161 | { "fmask", ecoff_directive_fmask, 0 }, | |
162 | { "frame", ecoff_directive_frame, 0 }, | |
163 | { "loc", ecoff_directive_loc, 0 }, | |
164 | { "mask", ecoff_directive_mask, 0 }, | |
165 | ||
166 | /* Other ECOFF directives. */ | |
167 | { "extern", ecoff_directive_extern, 0 }, | |
168 | ||
169 | /* These are used on Irix. I don't know how to implement them. */ | |
170 | { "alias", s_ignore, 0 }, | |
171 | { "bgnb", s_ignore, 0 }, | |
172 | { "endb", s_ignore, 0 }, | |
173 | { "lab", s_ignore, 0 }, | |
174 | { "noalias", s_ignore, 0 }, | |
175 | { "verstamp", s_ignore, 0 }, | |
176 | { "vreg", s_ignore, 0 }, | |
177 | #endif | |
178 | ||
ab9da554 | 179 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
180 | }; |
181 | ||
182 | #undef NO_RELOC | |
183 | #include "aout/aout64.h" | |
184 | ||
185 | /* This is called when the assembler starts. */ | |
186 | ||
3b22753a L |
187 | asection *elf_com_section_ptr; |
188 | ||
252b5132 | 189 | void |
dbe2df79 | 190 | elf_begin (void) |
252b5132 | 191 | { |
dbe2df79 AM |
192 | asection *s; |
193 | ||
252b5132 | 194 | /* Add symbols for the known sections to the symbol table. */ |
dbe2df79 AM |
195 | s = bfd_get_section_by_name (stdoutput, TEXT_SECTION_NAME); |
196 | symbol_table_insert (section_symbol (s)); | |
197 | s = bfd_get_section_by_name (stdoutput, DATA_SECTION_NAME); | |
198 | symbol_table_insert (section_symbol (s)); | |
199 | s = bfd_get_section_by_name (stdoutput, BSS_SECTION_NAME); | |
200 | symbol_table_insert (section_symbol (s)); | |
3b22753a | 201 | elf_com_section_ptr = bfd_com_section_ptr; |
252b5132 RH |
202 | } |
203 | ||
204 | void | |
dbe2df79 | 205 | elf_pop_insert (void) |
252b5132 RH |
206 | { |
207 | pop_insert (elf_pseudo_table); | |
208 | if (ECOFF_DEBUGGING) | |
209 | pop_insert (ecoff_debug_pseudo_table); | |
210 | } | |
211 | ||
212 | static bfd_vma | |
dbe2df79 | 213 | elf_s_get_size (symbolS *sym) |
252b5132 RH |
214 | { |
215 | return S_GET_SIZE (sym); | |
216 | } | |
217 | ||
218 | static void | |
dbe2df79 | 219 | elf_s_set_size (symbolS *sym, bfd_vma sz) |
252b5132 RH |
220 | { |
221 | S_SET_SIZE (sym, sz); | |
222 | } | |
223 | ||
224 | static bfd_vma | |
dbe2df79 | 225 | elf_s_get_align (symbolS *sym) |
252b5132 RH |
226 | { |
227 | return S_GET_ALIGN (sym); | |
228 | } | |
229 | ||
230 | static void | |
dbe2df79 | 231 | elf_s_set_align (symbolS *sym, bfd_vma align) |
252b5132 RH |
232 | { |
233 | S_SET_ALIGN (sym, align); | |
234 | } | |
235 | ||
4c63da97 | 236 | int |
dbe2df79 | 237 | elf_s_get_other (symbolS *sym) |
4c63da97 AM |
238 | { |
239 | return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; | |
240 | } | |
241 | ||
5110c57e | 242 | static void |
dbe2df79 | 243 | elf_s_set_other (symbolS *sym, int other) |
5110c57e HPN |
244 | { |
245 | S_SET_OTHER (sym, other); | |
246 | } | |
247 | ||
252b5132 | 248 | static int |
dbe2df79 | 249 | elf_sec_sym_ok_for_reloc (asection *sec) |
252b5132 RH |
250 | { |
251 | return obj_sec_sym_ok_for_reloc (sec); | |
252 | } | |
253 | ||
254 | void | |
c04f5787 | 255 | elf_file_symbol (const char *s, int appfile) |
252b5132 | 256 | { |
c04f5787 AM |
257 | if (!appfile |
258 | || symbol_rootP == NULL | |
259 | || symbol_rootP->bsym == NULL | |
260 | || (symbol_rootP->bsym->flags & BSF_FILE) == 0) | |
261 | { | |
262 | symbolS *sym; | |
252b5132 | 263 | |
c04f5787 AM |
264 | sym = symbol_new (s, absolute_section, 0, NULL); |
265 | symbol_set_frag (sym, &zero_address_frag); | |
266 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; | |
252b5132 | 267 | |
c04f5787 AM |
268 | if (symbol_rootP != sym) |
269 | { | |
270 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
271 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
252b5132 | 272 | #ifdef DEBUG |
c04f5787 | 273 | verify_symbol_chain (symbol_rootP, symbol_lastP); |
252b5132 | 274 | #endif |
c04f5787 | 275 | } |
252b5132 RH |
276 | } |
277 | ||
278 | #ifdef NEED_ECOFF_DEBUG | |
f17c130b | 279 | ecoff_new_file (s, appfile); |
252b5132 RH |
280 | #endif |
281 | } | |
282 | ||
e13bab5a AM |
283 | /* Called from read.c:s_comm after we've parsed .comm symbol, size. |
284 | Parse a possible alignment value. */ | |
285 | ||
3b22753a | 286 | symbolS * |
e13bab5a | 287 | elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size) |
252b5132 | 288 | { |
e13bab5a AM |
289 | addressT align = 0; |
290 | int is_local = symbol_get_obj (symbolP)->local; | |
252b5132 | 291 | |
e13bab5a | 292 | if (*input_line_pointer == ',') |
9be1cda6 | 293 | { |
e13bab5a | 294 | char *save = input_line_pointer; |
9be1cda6 | 295 | |
252b5132 RH |
296 | input_line_pointer++; |
297 | SKIP_WHITESPACE (); | |
e13bab5a AM |
298 | |
299 | if (*input_line_pointer == '"') | |
252b5132 | 300 | { |
e13bab5a AM |
301 | /* For sparc. Accept .common symbol, length, "bss" */ |
302 | input_line_pointer++; | |
303 | /* Some use the dot, some don't. */ | |
304 | if (*input_line_pointer == '.') | |
305 | input_line_pointer++; | |
306 | /* Some say data, some say bss. */ | |
307 | if (strncmp (input_line_pointer, "bss\"", 4) == 0) | |
308 | input_line_pointer += 4; | |
309 | else if (strncmp (input_line_pointer, "data\"", 5) == 0) | |
310 | input_line_pointer += 5; | |
311 | else | |
252b5132 | 312 | { |
e13bab5a AM |
313 | char *p = input_line_pointer; |
314 | char c; | |
315 | ||
316 | while (*--p != '"') | |
317 | ; | |
318 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
319 | if (*input_line_pointer++ == '"') | |
320 | break; | |
321 | c = *input_line_pointer; | |
322 | *input_line_pointer = '\0'; | |
323 | as_bad (_("bad .common segment %s"), p); | |
324 | *input_line_pointer = c; | |
325 | ignore_rest_of_line (); | |
326 | return NULL; | |
252b5132 | 327 | } |
e13bab5a AM |
328 | /* ??? Don't ask me why these are always global. */ |
329 | is_local = 0; | |
252b5132 RH |
330 | } |
331 | else | |
332 | { | |
e13bab5a AM |
333 | input_line_pointer = save; |
334 | align = parse_align (is_local); | |
335 | if (align == (addressT) -1) | |
336 | return NULL; | |
252b5132 RH |
337 | } |
338 | } | |
e13bab5a AM |
339 | |
340 | if (is_local) | |
341 | { | |
342 | bss_alloc (symbolP, size, align); | |
343 | S_CLEAR_EXTERNAL (symbolP); | |
344 | } | |
252b5132 RH |
345 | else |
346 | { | |
e13bab5a AM |
347 | S_SET_VALUE (symbolP, size); |
348 | S_SET_ALIGN (symbolP, align); | |
349 | S_SET_EXTERNAL (symbolP); | |
3b22753a | 350 | S_SET_SEGMENT (symbolP, elf_com_section_ptr); |
252b5132 RH |
351 | } |
352 | ||
49309057 | 353 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 | 354 | |
13ae64f3 | 355 | return symbolP; |
252b5132 RH |
356 | } |
357 | ||
13ae64f3 | 358 | void |
dbe2df79 | 359 | obj_elf_common (int is_common) |
13ae64f3 | 360 | { |
e13bab5a AM |
361 | if (flag_mri && is_common) |
362 | s_mri_common (0); | |
363 | else | |
364 | s_comm_internal (0, elf_common_parse); | |
13ae64f3 JJ |
365 | } |
366 | ||
367 | static void | |
dbe2df79 | 368 | obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED) |
13ae64f3 | 369 | { |
e13bab5a | 370 | symbolS *symbolP = s_comm_internal (0, elf_common_parse); |
13ae64f3 JJ |
371 | |
372 | if (symbolP) | |
373 | symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL; | |
374 | } | |
375 | ||
13c56984 AM |
376 | static void |
377 | obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED) | |
378 | { | |
379 | symbolS *symbolP = s_comm_internal (0, s_lcomm_internal); | |
380 | ||
381 | if (symbolP) | |
382 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; | |
383 | } | |
384 | ||
252b5132 | 385 | static void |
dbe2df79 | 386 | obj_elf_local (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
387 | { |
388 | char *name; | |
389 | int c; | |
390 | symbolS *symbolP; | |
391 | ||
392 | do | |
393 | { | |
394 | name = input_line_pointer; | |
395 | c = get_symbol_end (); | |
396 | symbolP = symbol_find_or_make (name); | |
397 | *input_line_pointer = c; | |
398 | SKIP_WHITESPACE (); | |
399 | S_CLEAR_EXTERNAL (symbolP); | |
49309057 | 400 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
401 | if (c == ',') |
402 | { | |
403 | input_line_pointer++; | |
404 | SKIP_WHITESPACE (); | |
405 | if (*input_line_pointer == '\n') | |
406 | c = '\n'; | |
407 | } | |
408 | } | |
409 | while (c == ','); | |
410 | demand_empty_rest_of_line (); | |
411 | } | |
412 | ||
413 | static void | |
dbe2df79 | 414 | obj_elf_weak (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
415 | { |
416 | char *name; | |
417 | int c; | |
418 | symbolS *symbolP; | |
419 | ||
420 | do | |
421 | { | |
422 | name = input_line_pointer; | |
423 | c = get_symbol_end (); | |
424 | symbolP = symbol_find_or_make (name); | |
425 | *input_line_pointer = c; | |
426 | SKIP_WHITESPACE (); | |
427 | S_SET_WEAK (symbolP); | |
49309057 | 428 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
429 | if (c == ',') |
430 | { | |
431 | input_line_pointer++; | |
432 | SKIP_WHITESPACE (); | |
433 | if (*input_line_pointer == '\n') | |
434 | c = '\n'; | |
435 | } | |
436 | } | |
437 | while (c == ','); | |
438 | demand_empty_rest_of_line (); | |
439 | } | |
440 | ||
2e13b764 | 441 | static void |
dbe2df79 | 442 | obj_elf_visibility (int visibility) |
2e13b764 NC |
443 | { |
444 | char *name; | |
445 | int c; | |
446 | symbolS *symbolP; | |
447 | asymbol *bfdsym; | |
448 | elf_symbol_type *elfsym; | |
449 | ||
450 | do | |
451 | { | |
452 | name = input_line_pointer; | |
453 | c = get_symbol_end (); | |
454 | symbolP = symbol_find_or_make (name); | |
455 | *input_line_pointer = c; | |
fa306131 | 456 | |
2e13b764 | 457 | SKIP_WHITESPACE (); |
fa306131 | 458 | |
2e13b764 NC |
459 | bfdsym = symbol_get_bfdsym (symbolP); |
460 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 461 | |
2e13b764 | 462 | assert (elfsym); |
fa306131 | 463 | |
20e420c2 RH |
464 | elfsym->internal_elf_sym.st_other &= ~3; |
465 | elfsym->internal_elf_sym.st_other |= visibility; | |
fa306131 | 466 | |
2e13b764 NC |
467 | if (c == ',') |
468 | { | |
469 | input_line_pointer ++; | |
fa306131 | 470 | |
2e13b764 | 471 | SKIP_WHITESPACE (); |
fa306131 | 472 | |
2e13b764 NC |
473 | if (*input_line_pointer == '\n') |
474 | c = '\n'; | |
475 | } | |
476 | } | |
477 | while (c == ','); | |
fa306131 | 478 | |
2e13b764 NC |
479 | demand_empty_rest_of_line (); |
480 | } | |
481 | ||
252b5132 RH |
482 | static segT previous_section; |
483 | static int previous_subsection; | |
484 | ||
9de8d8f1 RH |
485 | struct section_stack |
486 | { | |
487 | struct section_stack *next; | |
488 | segT seg, prev_seg; | |
489 | int subseg, prev_subseg; | |
490 | }; | |
491 | ||
492 | static struct section_stack *section_stack; | |
493 | ||
fafe6678 | 494 | static bfd_boolean |
86654c12 L |
495 | get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) |
496 | { | |
fafe6678 | 497 | const char *gname = inf; |
86654c12 L |
498 | const char *group_name = elf_group_name (sec); |
499 | ||
fafe6678 | 500 | return (group_name == gname |
86654c12 | 501 | || (group_name != NULL |
fafe6678 L |
502 | && gname != NULL |
503 | && strcmp (group_name, gname) == 0)); | |
86654c12 L |
504 | } |
505 | ||
252b5132 RH |
506 | /* Handle the .section pseudo-op. This code supports two different |
507 | syntaxes. | |
508 | ||
509 | The first is found on Solaris, and looks like | |
510 | .section ".sec1",#alloc,#execinstr,#write | |
511 | Here the names after '#' are the SHF_* flags to turn on for the | |
512 | section. I'm not sure how it determines the SHT_* type (BFD | |
513 | doesn't really give us control over the type, anyhow). | |
514 | ||
515 | The second format is found on UnixWare, and probably most SVR4 | |
516 | machines, and looks like | |
517 | .section .sec1,"a",@progbits | |
518 | The quoted string may contain any combination of a, w, x, and | |
519 | represents the SHF_* flags to turn on for the section. The string | |
520 | beginning with '@' can be progbits or nobits. There should be | |
521 | other possibilities, but I don't know what they are. In any case, | |
522 | BFD doesn't really let us set the section type. */ | |
523 | ||
cca86cc8 | 524 | void |
dbe2df79 AM |
525 | obj_elf_change_section (const char *name, |
526 | int type, | |
527 | int attr, | |
528 | int entsize, | |
529 | const char *group_name, | |
530 | int linkonce, | |
531 | int push) | |
252b5132 | 532 | { |
fafe6678 | 533 | asection *old_sec; |
252b5132 | 534 | segT sec; |
742f45cf | 535 | flagword flags; |
551b43fd | 536 | const struct elf_backend_data *bed; |
f61e8019 | 537 | const struct bfd_elf_special_section *ssect; |
252b5132 RH |
538 | |
539 | #ifdef md_flush_pending_output | |
540 | md_flush_pending_output (); | |
541 | #endif | |
542 | ||
9de8d8f1 RH |
543 | /* Switch to the section, creating it if necessary. */ |
544 | if (push) | |
545 | { | |
546 | struct section_stack *elt; | |
547 | elt = xmalloc (sizeof (struct section_stack)); | |
548 | elt->next = section_stack; | |
549 | elt->seg = now_seg; | |
550 | elt->prev_seg = previous_section; | |
551 | elt->subseg = now_subseg; | |
552 | elt->prev_subseg = previous_subsection; | |
553 | section_stack = elt; | |
554 | } | |
555 | previous_section = now_seg; | |
556 | previous_subsection = now_subseg; | |
557 | ||
fafe6678 L |
558 | old_sec = bfd_get_section_by_name_if (stdoutput, name, get_section, |
559 | (void *) group_name); | |
560 | if (old_sec) | |
86654c12 | 561 | { |
fafe6678 | 562 | sec = old_sec; |
86654c12 L |
563 | subseg_set (sec, 0); |
564 | } | |
565 | else | |
566 | sec = subseg_force_new (name, 0); | |
567 | ||
551b43fd AM |
568 | bed = get_elf_backend_data (stdoutput); |
569 | ssect = (*bed->get_sec_type_attr) (stdoutput, sec); | |
9de8d8f1 | 570 | |
f61e8019 | 571 | if (ssect != NULL) |
2f89ff8d | 572 | { |
ea8f8eab L |
573 | bfd_boolean override = FALSE; |
574 | ||
2f89ff8d | 575 | if (type == SHT_NULL) |
f61e8019 AM |
576 | type = ssect->type; |
577 | else if (type != ssect->type) | |
2f89ff8d | 578 | { |
fafe6678 | 579 | if (old_sec == NULL |
2f89ff8d | 580 | /* FIXME: gcc, as of 2002-10-22, will emit |
7ed1d346 | 581 | |
2f89ff8d | 582 | .section .init_array,"aw",@progbits |
7ed1d346 | 583 | |
2f89ff8d | 584 | for __attribute__ ((section (".init_array"))). |
3b22753a L |
585 | "@progbits" is incorrect. Also for x86-64 large bss |
586 | sections, gcc, as of 2005-07-06, will emit | |
587 | ||
588 | .section .lbss,"aw",@progbits | |
589 | ||
2f89ff8d | 590 | "@progbits" is incorrect. */ |
3b22753a L |
591 | #ifdef TC_I386 |
592 | && (bed->s->arch_size != 64 | |
593 | || !(ssect->attr & SHF_X86_64_LARGE)) | |
594 | #endif | |
f61e8019 AM |
595 | && ssect->type != SHT_INIT_ARRAY |
596 | && ssect->type != SHT_FINI_ARRAY | |
597 | && ssect->type != SHT_PREINIT_ARRAY) | |
2f89ff8d L |
598 | { |
599 | /* We allow to specify any type for a .note section. */ | |
f61e8019 | 600 | if (ssect->type != SHT_NOTE) |
2f89ff8d L |
601 | as_warn (_("setting incorrect section type for %s"), |
602 | name); | |
603 | } | |
604 | else | |
605 | { | |
606 | as_warn (_("ignoring incorrect section type for %s"), | |
742f45cf | 607 | name); |
f61e8019 | 608 | type = ssect->type; |
2f89ff8d L |
609 | } |
610 | } | |
611 | ||
fafe6678 | 612 | if (old_sec == NULL && (attr & ~ssect->attr) != 0) |
2f89ff8d L |
613 | { |
614 | /* As a GNU extension, we permit a .note section to be | |
f61e8019 | 615 | allocatable. If the linker sees an allocatable .note |
2f89ff8d | 616 | section, it will create a PT_NOTE segment in the output |
92191b29 | 617 | file. We also allow "x" for .note.GNU-stack. */ |
f61e8019 AM |
618 | if (ssect->type == SHT_NOTE |
619 | && (attr == SHF_ALLOC || attr == SHF_EXECINSTR)) | |
620 | ; | |
621 | /* Allow different SHF_MERGE and SHF_STRINGS if we have | |
622 | something like .rodata.str. */ | |
623 | else if (ssect->suffix_length == -2 | |
624 | && name[ssect->prefix_length] == '.' | |
ea8f8eab L |
625 | && (attr |
626 | & ~ssect->attr | |
627 | & ~SHF_MERGE | |
628 | & ~SHF_STRINGS) == 0) | |
f61e8019 | 629 | ; |
ea8f8eab L |
630 | /* .interp, .strtab and .symtab can have SHF_ALLOC. */ |
631 | else if (attr == SHF_ALLOC | |
632 | && (strcmp (name, ".interp") == 0 | |
633 | || strcmp (name, ".strtab") == 0 | |
634 | || strcmp (name, ".symtab") == 0)) | |
635 | override = TRUE; | |
b9f18452 L |
636 | /* .note.GNU-stack can have SHF_EXECINSTR. */ |
637 | else if (attr == SHF_EXECINSTR | |
638 | && strcmp (name, ".note.GNU-stack") == 0) | |
639 | override = TRUE; | |
7f841127 L |
640 | #ifdef TC_ALPHA |
641 | /* A section on Alpha may have SHF_ALPHA_GPREL. */ | |
642 | else if ((attr & ~ssect->attr) == SHF_ALPHA_GPREL) | |
643 | override = TRUE; | |
644 | #endif | |
f61e8019 | 645 | else |
ea8f8eab | 646 | { |
86654c12 L |
647 | if (group_name == NULL) |
648 | as_warn (_("setting incorrect section attributes for %s"), | |
649 | name); | |
ea8f8eab L |
650 | override = TRUE; |
651 | } | |
2f89ff8d | 652 | } |
fafe6678 | 653 | if (!override && old_sec == NULL) |
f61e8019 | 654 | attr |= ssect->attr; |
2f89ff8d | 655 | } |
742f45cf AM |
656 | |
657 | /* Convert ELF type and flags to BFD flags. */ | |
658 | flags = (SEC_RELOC | |
659 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
660 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
661 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
662 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
663 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
13ae64f3 JJ |
664 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0) |
665 | | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0)); | |
9de8d8f1 | 666 | #ifdef md_elf_section_flags |
742f45cf | 667 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
668 | #endif |
669 | ||
86654c12 L |
670 | if (linkonce) |
671 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
672 | ||
fafe6678 | 673 | if (old_sec == NULL) |
742f45cf AM |
674 | { |
675 | symbolS *secsym; | |
676 | ||
7a6d0b32 JB |
677 | elf_section_type (sec) = type; |
678 | elf_section_flags (sec) = attr; | |
679 | ||
9de8d8f1 RH |
680 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
681 | if (type == SHT_NOBITS) | |
13c56984 | 682 | seg_info (sec)->bss = 1; |
9de8d8f1 RH |
683 | |
684 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
685 | if (flags & SEC_MERGE) |
686 | sec->entsize = entsize; | |
aa1f4858 | 687 | elf_group_name (sec) = group_name; |
9de8d8f1 RH |
688 | |
689 | /* Add a symbol for this section to the symbol table. */ | |
690 | secsym = symbol_find (name); | |
691 | if (secsym != NULL) | |
692 | symbol_set_bfdsym (secsym, sec->symbol); | |
693 | else | |
13c56984 | 694 | symbol_table_insert (section_symbol (sec)); |
9de8d8f1 | 695 | } |
7a6d0b32 | 696 | else |
742f45cf | 697 | { |
7a6d0b32 JB |
698 | if (type != SHT_NULL |
699 | && (unsigned) type != elf_section_type (old_sec)) | |
700 | as_warn (_("ignoring changed section type for %s"), name); | |
701 | ||
702 | if (attr != 0) | |
703 | { | |
704 | /* If section attributes are specified the second time we see a | |
705 | particular section, then check that they are the same as we | |
706 | saw the first time. */ | |
707 | if (((old_sec->flags ^ flags) | |
708 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
709 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS | |
710 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
711 | | SEC_THREAD_LOCAL))) | |
712 | as_warn (_("ignoring changed section attributes for %s"), name); | |
713 | if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize) | |
714 | as_warn (_("ignoring changed section entity size for %s"), name); | |
715 | } | |
742f45cf | 716 | } |
9de8d8f1 RH |
717 | |
718 | #ifdef md_elf_section_change_hook | |
742f45cf | 719 | md_elf_section_change_hook (); |
9de8d8f1 RH |
720 | #endif |
721 | } | |
722 | ||
8d28c9d7 | 723 | static int |
dbe2df79 | 724 | obj_elf_parse_section_letters (char *str, size_t len) |
9de8d8f1 RH |
725 | { |
726 | int attr = 0; | |
727 | ||
728 | while (len > 0) | |
729 | { | |
730 | switch (*str) | |
731 | { | |
732 | case 'a': | |
733 | attr |= SHF_ALLOC; | |
734 | break; | |
735 | case 'w': | |
736 | attr |= SHF_WRITE; | |
737 | break; | |
738 | case 'x': | |
739 | attr |= SHF_EXECINSTR; | |
740 | break; | |
9469ddf0 | 741 | case 'M': |
f5fa8ca2 JJ |
742 | attr |= SHF_MERGE; |
743 | break; | |
9469ddf0 | 744 | case 'S': |
f5fa8ca2 JJ |
745 | attr |= SHF_STRINGS; |
746 | break; | |
060adf0e AM |
747 | case 'G': |
748 | attr |= SHF_GROUP; | |
749 | break; | |
13ae64f3 JJ |
750 | case 'T': |
751 | attr |= SHF_TLS; | |
752 | break; | |
34105363 L |
753 | /* Compatibility. */ |
754 | case 'm': | |
755 | if (*(str - 1) == 'a') | |
756 | { | |
757 | attr |= SHF_MERGE; | |
758 | if (len > 1 && str[1] == 's') | |
759 | { | |
760 | attr |= SHF_STRINGS; | |
761 | str++, len--; | |
762 | } | |
763 | break; | |
764 | } | |
9de8d8f1 RH |
765 | default: |
766 | { | |
13ae64f3 | 767 | char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S,G,T"); |
9de8d8f1 RH |
768 | #ifdef md_elf_section_letter |
769 | int md_attr = md_elf_section_letter (*str, &bad_msg); | |
770 | if (md_attr >= 0) | |
771 | attr |= md_attr; | |
772 | else | |
773 | #endif | |
711ef82f | 774 | as_fatal ("%s", bad_msg); |
9de8d8f1 RH |
775 | } |
776 | break; | |
777 | } | |
778 | str++, len--; | |
779 | } | |
780 | ||
781 | return attr; | |
782 | } | |
783 | ||
8d28c9d7 | 784 | static int |
dbe2df79 | 785 | obj_elf_section_word (char *str, size_t len) |
9de8d8f1 RH |
786 | { |
787 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
788 | return SHF_WRITE; | |
789 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
790 | return SHF_ALLOC; | |
791 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
792 | return SHF_EXECINSTR; | |
b9734f35 JJ |
793 | if (len == 3 && strncmp (str, "tls", 3) == 0) |
794 | return SHF_TLS; | |
9de8d8f1 RH |
795 | |
796 | #ifdef md_elf_section_word | |
797 | { | |
798 | int md_attr = md_elf_section_word (str, len); | |
799 | if (md_attr >= 0) | |
800 | return md_attr; | |
801 | } | |
802 | #endif | |
803 | ||
6ce8b369 | 804 | as_warn (_("unrecognized section attribute")); |
9de8d8f1 RH |
805 | return 0; |
806 | } | |
807 | ||
8d28c9d7 | 808 | static int |
dbe2df79 | 809 | obj_elf_section_type (char *str, size_t len) |
9de8d8f1 RH |
810 | { |
811 | if (len == 8 && strncmp (str, "progbits", 8) == 0) | |
812 | return SHT_PROGBITS; | |
813 | if (len == 6 && strncmp (str, "nobits", 6) == 0) | |
814 | return SHT_NOBITS; | |
34f70875 L |
815 | if (len == 4 && strncmp (str, "note", 4) == 0) |
816 | return SHT_NOTE; | |
10b016c2 PB |
817 | if (len == 10 && strncmp (str, "init_array", 10) == 0) |
818 | return SHT_INIT_ARRAY; | |
819 | if (len == 10 && strncmp (str, "fini_array", 10) == 0) | |
820 | return SHT_FINI_ARRAY; | |
821 | if (len == 13 && strncmp (str, "preinit_array", 13) == 0) | |
822 | return SHT_PREINIT_ARRAY; | |
9de8d8f1 RH |
823 | |
824 | #ifdef md_elf_section_type | |
825 | { | |
826 | int md_type = md_elf_section_type (str, len); | |
827 | if (md_type >= 0) | |
828 | return md_type; | |
829 | } | |
830 | #endif | |
831 | ||
6ce8b369 | 832 | as_warn (_("unrecognized section type")); |
9de8d8f1 RH |
833 | return 0; |
834 | } | |
835 | ||
6ce8b369 AM |
836 | /* Get name of section. */ |
837 | static char * | |
dbe2df79 | 838 | obj_elf_section_name (void) |
6ce8b369 AM |
839 | { |
840 | char *name; | |
841 | ||
842 | SKIP_WHITESPACE (); | |
843 | if (*input_line_pointer == '"') | |
844 | { | |
845 | int dummy; | |
846 | ||
847 | name = demand_copy_C_string (&dummy); | |
848 | if (name == NULL) | |
849 | { | |
850 | ignore_rest_of_line (); | |
851 | return NULL; | |
852 | } | |
853 | } | |
854 | else | |
855 | { | |
856 | char *end = input_line_pointer; | |
857 | ||
858 | while (0 == strchr ("\n\t,; ", *end)) | |
859 | end++; | |
860 | if (end == input_line_pointer) | |
861 | { | |
c95b35a9 | 862 | as_bad (_("missing name")); |
6ce8b369 AM |
863 | ignore_rest_of_line (); |
864 | return NULL; | |
865 | } | |
866 | ||
867 | name = xmalloc (end - input_line_pointer + 1); | |
868 | memcpy (name, input_line_pointer, end - input_line_pointer); | |
869 | name[end - input_line_pointer] = '\0'; | |
612d7b83 L |
870 | #ifdef tc_canonicalize_section_name |
871 | name = tc_canonicalize_section_name (name); | |
872 | #endif | |
6ce8b369 AM |
873 | input_line_pointer = end; |
874 | } | |
875 | SKIP_WHITESPACE (); | |
876 | return name; | |
877 | } | |
878 | ||
9de8d8f1 | 879 | void |
dbe2df79 | 880 | obj_elf_section (int push) |
9de8d8f1 | 881 | { |
aa1f4858 | 882 | char *name, *group_name, *beg; |
9de8d8f1 | 883 | int type, attr, dummy; |
f5fa8ca2 | 884 | int entsize; |
d2dab548 | 885 | int linkonce; |
6f932bce | 886 | subsegT new_subsection = -1; |
9de8d8f1 | 887 | |
5b93d8bb | 888 | #ifndef TC_I370 |
252b5132 RH |
889 | if (flag_mri) |
890 | { | |
891 | char mri_type; | |
892 | ||
9de8d8f1 | 893 | #ifdef md_flush_pending_output |
60bcf0fa | 894 | md_flush_pending_output (); |
9de8d8f1 RH |
895 | #endif |
896 | ||
252b5132 RH |
897 | previous_section = now_seg; |
898 | previous_subsection = now_subseg; | |
899 | ||
900 | s_mri_sect (&mri_type); | |
901 | ||
902 | #ifdef md_elf_section_change_hook | |
903 | md_elf_section_change_hook (); | |
904 | #endif | |
905 | ||
906 | return; | |
907 | } | |
5b93d8bb | 908 | #endif /* ! defined (TC_I370) */ |
252b5132 | 909 | |
6ce8b369 AM |
910 | name = obj_elf_section_name (); |
911 | if (name == NULL) | |
912 | return; | |
252b5132 RH |
913 | type = SHT_NULL; |
914 | attr = 0; | |
aa1f4858 | 915 | group_name = NULL; |
f5fa8ca2 | 916 | entsize = 0; |
d2dab548 | 917 | linkonce = 0; |
252b5132 RH |
918 | |
919 | if (*input_line_pointer == ',') | |
920 | { | |
921 | /* Skip the comma. */ | |
922 | ++input_line_pointer; | |
252b5132 RH |
923 | SKIP_WHITESPACE (); |
924 | ||
6f932bce NC |
925 | if (push) |
926 | { | |
927 | new_subsection = (subsegT) get_absolute_expression (); | |
928 | } | |
929 | else if (*input_line_pointer == '"') | |
252b5132 | 930 | { |
9de8d8f1 RH |
931 | beg = demand_copy_C_string (&dummy); |
932 | if (beg == NULL) | |
252b5132 | 933 | { |
9de8d8f1 RH |
934 | ignore_rest_of_line (); |
935 | return; | |
252b5132 | 936 | } |
9de8d8f1 | 937 | attr |= obj_elf_parse_section_letters (beg, strlen (beg)); |
252b5132 RH |
938 | |
939 | SKIP_WHITESPACE (); | |
940 | if (*input_line_pointer == ',') | |
941 | { | |
9de8d8f1 | 942 | char c; |
060adf0e AM |
943 | char *save = input_line_pointer; |
944 | ||
252b5132 RH |
945 | ++input_line_pointer; |
946 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
947 | c = *input_line_pointer; |
948 | if (c == '"') | |
252b5132 | 949 | { |
9de8d8f1 RH |
950 | beg = demand_copy_C_string (&dummy); |
951 | if (beg == NULL) | |
252b5132 | 952 | { |
9de8d8f1 RH |
953 | ignore_rest_of_line (); |
954 | return; | |
252b5132 | 955 | } |
9de8d8f1 | 956 | type = obj_elf_section_type (beg, strlen (beg)); |
9de8d8f1 RH |
957 | } |
958 | else if (c == '@' || c == '%') | |
959 | { | |
960 | beg = ++input_line_pointer; | |
961 | c = get_symbol_end (); | |
962 | *input_line_pointer = c; | |
963 | type = obj_elf_section_type (beg, input_line_pointer - beg); | |
252b5132 | 964 | } |
060adf0e AM |
965 | else |
966 | input_line_pointer = save; | |
252b5132 | 967 | } |
f5fa8ca2 JJ |
968 | |
969 | SKIP_WHITESPACE (); | |
6ce8b369 | 970 | if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',') |
f5fa8ca2 JJ |
971 | { |
972 | ++input_line_pointer; | |
973 | SKIP_WHITESPACE (); | |
974 | entsize = get_absolute_expression (); | |
6ce8b369 | 975 | SKIP_WHITESPACE (); |
f5fa8ca2 JJ |
976 | if (entsize < 0) |
977 | { | |
6ce8b369 | 978 | as_warn (_("invalid merge entity size")); |
f5fa8ca2 JJ |
979 | attr &= ~SHF_MERGE; |
980 | entsize = 0; | |
981 | } | |
982 | } | |
6ce8b369 AM |
983 | else if ((attr & SHF_MERGE) != 0) |
984 | { | |
985 | as_warn (_("entity size for SHF_MERGE not specified")); | |
986 | attr &= ~SHF_MERGE; | |
987 | } | |
060adf0e AM |
988 | |
989 | if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',') | |
990 | { | |
991 | ++input_line_pointer; | |
aa1f4858 AM |
992 | group_name = obj_elf_section_name (); |
993 | if (group_name == NULL) | |
060adf0e | 994 | attr &= ~SHF_GROUP; |
d2dab548 AM |
995 | else if (strncmp (input_line_pointer, ",comdat", 7) == 0) |
996 | { | |
997 | input_line_pointer += 7; | |
998 | linkonce = 1; | |
999 | } | |
1000 | else if (strncmp (name, ".gnu.linkonce", 13) == 0) | |
1001 | linkonce = 1; | |
060adf0e AM |
1002 | } |
1003 | else if ((attr & SHF_GROUP) != 0) | |
1004 | { | |
1005 | as_warn (_("group name for SHF_GROUP not specified")); | |
1006 | attr &= ~SHF_GROUP; | |
1007 | } | |
252b5132 RH |
1008 | } |
1009 | else | |
1010 | { | |
1011 | do | |
1012 | { | |
9de8d8f1 RH |
1013 | char c; |
1014 | ||
252b5132 RH |
1015 | SKIP_WHITESPACE (); |
1016 | if (*input_line_pointer != '#') | |
1017 | { | |
c95b35a9 | 1018 | as_bad (_("character following name is not '#'")); |
252b5132 RH |
1019 | ignore_rest_of_line (); |
1020 | return; | |
1021 | } | |
9de8d8f1 RH |
1022 | beg = ++input_line_pointer; |
1023 | c = get_symbol_end (); | |
1024 | *input_line_pointer = c; | |
1025 | ||
1026 | attr |= obj_elf_section_word (beg, input_line_pointer - beg); | |
1027 | ||
252b5132 RH |
1028 | SKIP_WHITESPACE (); |
1029 | } | |
1030 | while (*input_line_pointer++ == ','); | |
1031 | --input_line_pointer; | |
1032 | } | |
1033 | } | |
1034 | ||
252b5132 | 1035 | demand_empty_rest_of_line (); |
9de8d8f1 | 1036 | |
d2dab548 | 1037 | obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push); |
6f932bce NC |
1038 | |
1039 | if (push && new_subsection != -1) | |
1040 | subseg_set (now_seg, new_subsection); | |
252b5132 RH |
1041 | } |
1042 | ||
1043 | /* Change to the .data section. */ | |
1044 | ||
16b93d88 | 1045 | void |
dbe2df79 | 1046 | obj_elf_data (int i) |
252b5132 RH |
1047 | { |
1048 | #ifdef md_flush_pending_output | |
1049 | md_flush_pending_output (); | |
1050 | #endif | |
1051 | ||
1052 | previous_section = now_seg; | |
1053 | previous_subsection = now_subseg; | |
1054 | s_data (i); | |
1055 | ||
1056 | #ifdef md_elf_section_change_hook | |
1057 | md_elf_section_change_hook (); | |
1058 | #endif | |
1059 | } | |
1060 | ||
1061 | /* Change to the .text section. */ | |
1062 | ||
16b93d88 | 1063 | void |
dbe2df79 | 1064 | obj_elf_text (int i) |
252b5132 RH |
1065 | { |
1066 | #ifdef md_flush_pending_output | |
1067 | md_flush_pending_output (); | |
1068 | #endif | |
1069 | ||
1070 | previous_section = now_seg; | |
1071 | previous_subsection = now_subseg; | |
1072 | s_text (i); | |
1073 | ||
1074 | #ifdef md_elf_section_change_hook | |
1075 | md_elf_section_change_hook (); | |
1076 | #endif | |
1077 | } | |
1078 | ||
8fe53b44 JB |
1079 | /* Change to the *ABS* section. */ |
1080 | ||
1081 | void | |
1082 | obj_elf_struct (int i) | |
1083 | { | |
1084 | #ifdef md_flush_pending_output | |
1085 | md_flush_pending_output (); | |
1086 | #endif | |
1087 | ||
1088 | previous_section = now_seg; | |
1089 | previous_subsection = now_subseg; | |
1090 | s_struct (i); | |
1091 | ||
1092 | #ifdef md_elf_section_change_hook | |
1093 | md_elf_section_change_hook (); | |
1094 | #endif | |
1095 | } | |
1096 | ||
252b5132 | 1097 | static void |
dbe2df79 | 1098 | obj_elf_subsection (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1099 | { |
6f932bce | 1100 | int temp; |
252b5132 RH |
1101 | |
1102 | #ifdef md_flush_pending_output | |
1103 | md_flush_pending_output (); | |
1104 | #endif | |
1105 | ||
1106 | previous_section = now_seg; | |
1107 | previous_subsection = now_subseg; | |
1108 | ||
1109 | temp = get_absolute_expression (); | |
1110 | subseg_set (now_seg, (subsegT) temp); | |
1111 | demand_empty_rest_of_line (); | |
1112 | ||
1113 | #ifdef md_elf_section_change_hook | |
1114 | md_elf_section_change_hook (); | |
1115 | #endif | |
1116 | } | |
1117 | ||
1118 | /* This can be called from the processor backends if they change | |
1119 | sections. */ | |
1120 | ||
1121 | void | |
dbe2df79 | 1122 | obj_elf_section_change_hook (void) |
252b5132 RH |
1123 | { |
1124 | previous_section = now_seg; | |
1125 | previous_subsection = now_subseg; | |
1126 | } | |
1127 | ||
1128 | void | |
dbe2df79 | 1129 | obj_elf_previous (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1130 | { |
9de8d8f1 RH |
1131 | segT new_section; |
1132 | int new_subsection; | |
1133 | ||
252b5132 RH |
1134 | if (previous_section == 0) |
1135 | { | |
6ce8b369 | 1136 | as_warn (_(".previous without corresponding .section; ignored")); |
252b5132 RH |
1137 | return; |
1138 | } | |
1139 | ||
1140 | #ifdef md_flush_pending_output | |
1141 | md_flush_pending_output (); | |
1142 | #endif | |
1143 | ||
9de8d8f1 RH |
1144 | new_section = previous_section; |
1145 | new_subsection = previous_subsection; | |
1146 | previous_section = now_seg; | |
1147 | previous_subsection = now_subseg; | |
1148 | subseg_set (new_section, new_subsection); | |
1149 | ||
1150 | #ifdef md_elf_section_change_hook | |
1151 | md_elf_section_change_hook (); | |
1152 | #endif | |
1153 | } | |
1154 | ||
1155 | static void | |
dbe2df79 | 1156 | obj_elf_popsection (int xxx ATTRIBUTE_UNUSED) |
9de8d8f1 RH |
1157 | { |
1158 | struct section_stack *top = section_stack; | |
1159 | ||
1160 | if (top == NULL) | |
1161 | { | |
6ce8b369 | 1162 | as_warn (_(".popsection without corresponding .pushsection; ignored")); |
9de8d8f1 RH |
1163 | return; |
1164 | } | |
1165 | ||
1166 | #ifdef md_flush_pending_output | |
1167 | md_flush_pending_output (); | |
1168 | #endif | |
1169 | ||
1170 | section_stack = top->next; | |
1171 | previous_section = top->prev_seg; | |
1172 | previous_subsection = top->prev_subseg; | |
1173 | subseg_set (top->seg, top->subseg); | |
1174 | free (top); | |
252b5132 RH |
1175 | |
1176 | #ifdef md_elf_section_change_hook | |
1177 | md_elf_section_change_hook (); | |
1178 | #endif | |
1179 | } | |
1180 | ||
1181 | static void | |
dbe2df79 | 1182 | obj_elf_line (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1183 | { |
1184 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1185 | delightful bug, so we are not being incompatible here. */ |
dbe2df79 | 1186 | new_logical_line (NULL, get_absolute_expression ()); |
252b5132 RH |
1187 | demand_empty_rest_of_line (); |
1188 | } | |
1189 | ||
1190 | /* This handles the .symver pseudo-op, which is used to specify a | |
1191 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1192 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1193 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1194 | with the same value as the symbol NAME. */ | |
1195 | ||
1196 | static void | |
dbe2df79 | 1197 | obj_elf_symver (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1198 | { |
1199 | char *name; | |
1200 | char c; | |
468cced8 | 1201 | char old_lexat; |
252b5132 RH |
1202 | symbolS *sym; |
1203 | ||
1204 | name = input_line_pointer; | |
1205 | c = get_symbol_end (); | |
1206 | ||
1207 | sym = symbol_find_or_make (name); | |
1208 | ||
1209 | *input_line_pointer = c; | |
1210 | ||
252b5132 RH |
1211 | SKIP_WHITESPACE (); |
1212 | if (*input_line_pointer != ',') | |
1213 | { | |
1214 | as_bad (_("expected comma after name in .symver")); | |
1215 | ignore_rest_of_line (); | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | ++input_line_pointer; | |
eba874d8 | 1220 | SKIP_WHITESPACE (); |
252b5132 | 1221 | name = input_line_pointer; |
468cced8 AM |
1222 | |
1223 | /* Temporarily include '@' in symbol names. */ | |
1224 | old_lexat = lex_type[(unsigned char) '@']; | |
1225 | lex_type[(unsigned char) '@'] |= LEX_NAME; | |
1226 | c = get_symbol_end (); | |
1227 | lex_type[(unsigned char) '@'] = old_lexat; | |
252b5132 | 1228 | |
339681c0 L |
1229 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1230 | { | |
1231 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1232 | |
339681c0 | 1233 | *input_line_pointer = c; |
252b5132 | 1234 | |
6f620856 L |
1235 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1236 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1237 | { |
1238 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1239 | symbol_get_obj (sym)->versioned_name, | |
1240 | S_GET_NAME (sym)); | |
1241 | ignore_rest_of_line (); | |
1242 | return; | |
1243 | } | |
1244 | } | |
1245 | else | |
252b5132 | 1246 | { |
339681c0 L |
1247 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1248 | { | |
1249 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1250 | name, symbol_get_obj (sym)->versioned_name, | |
1251 | S_GET_NAME (sym)); | |
1252 | ignore_rest_of_line (); | |
1253 | return; | |
1254 | } | |
1255 | ||
1256 | *input_line_pointer = c; | |
252b5132 RH |
1257 | } |
1258 | ||
1259 | demand_empty_rest_of_line (); | |
1260 | } | |
1261 | ||
1262 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1263 | to the linker the hierarchy in which a particular table resides. The | |
1264 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1265 | ||
904a31bf | 1266 | struct fix * |
dbe2df79 | 1267 | obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1268 | { |
1269 | char *cname, *pname; | |
1270 | symbolS *csym, *psym; | |
1271 | char c, bad = 0; | |
1272 | ||
1273 | if (*input_line_pointer == '#') | |
1274 | ++input_line_pointer; | |
1275 | ||
1276 | cname = input_line_pointer; | |
1277 | c = get_symbol_end (); | |
1278 | csym = symbol_find (cname); | |
1279 | ||
1280 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1281 | the same child symbol. Also, we can currently only do this if the | |
1282 | child symbol is already exists and is placed in a fragment. */ | |
1283 | ||
49309057 | 1284 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 | 1285 | { |
bd3ba5d1 | 1286 | as_bad (_("expected `%s' to have already been set for .vtable_inherit"), |
252b5132 RH |
1287 | cname); |
1288 | bad = 1; | |
1289 | } | |
1290 | ||
1291 | *input_line_pointer = c; | |
1292 | ||
1293 | SKIP_WHITESPACE (); | |
1294 | if (*input_line_pointer != ',') | |
1295 | { | |
bd3ba5d1 | 1296 | as_bad (_("expected comma after name in .vtable_inherit")); |
252b5132 | 1297 | ignore_rest_of_line (); |
904a31bf | 1298 | return NULL; |
252b5132 RH |
1299 | } |
1300 | ||
1301 | ++input_line_pointer; | |
1302 | SKIP_WHITESPACE (); | |
1303 | ||
1304 | if (*input_line_pointer == '#') | |
1305 | ++input_line_pointer; | |
1306 | ||
1307 | if (input_line_pointer[0] == '0' | |
1308 | && (input_line_pointer[1] == '\0' | |
3882b010 | 1309 | || ISSPACE (input_line_pointer[1]))) |
252b5132 RH |
1310 | { |
1311 | psym = section_symbol (absolute_section); | |
1312 | ++input_line_pointer; | |
1313 | } | |
1314 | else | |
1315 | { | |
1316 | pname = input_line_pointer; | |
1317 | c = get_symbol_end (); | |
1318 | psym = symbol_find_or_make (pname); | |
1319 | *input_line_pointer = c; | |
1320 | } | |
1321 | ||
1322 | demand_empty_rest_of_line (); | |
1323 | ||
1324 | if (bad) | |
904a31bf | 1325 | return NULL; |
252b5132 | 1326 | |
49309057 | 1327 | assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1328 | return fix_new (symbol_get_frag (csym), |
1329 | symbol_get_value_expression (csym)->X_add_number, | |
1330 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1331 | } |
fa306131 | 1332 | |
252b5132 RH |
1333 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1334 | to the linker that a vtable slot was used. The syntax is | |
1335 | ".vtable_entry tablename, offset". */ | |
1336 | ||
904a31bf | 1337 | struct fix * |
dbe2df79 | 1338 | obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1339 | { |
1340 | char *name; | |
1341 | symbolS *sym; | |
1342 | offsetT offset; | |
1343 | char c; | |
1344 | ||
1345 | if (*input_line_pointer == '#') | |
1346 | ++input_line_pointer; | |
1347 | ||
1348 | name = input_line_pointer; | |
1349 | c = get_symbol_end (); | |
1350 | sym = symbol_find_or_make (name); | |
1351 | *input_line_pointer = c; | |
1352 | ||
1353 | SKIP_WHITESPACE (); | |
1354 | if (*input_line_pointer != ',') | |
1355 | { | |
bd3ba5d1 | 1356 | as_bad (_("expected comma after name in .vtable_entry")); |
252b5132 | 1357 | ignore_rest_of_line (); |
904a31bf | 1358 | return NULL; |
252b5132 RH |
1359 | } |
1360 | ||
1361 | ++input_line_pointer; | |
1362 | if (*input_line_pointer == '#') | |
1363 | ++input_line_pointer; | |
1364 | ||
1365 | offset = get_absolute_expression (); | |
1366 | ||
252b5132 | 1367 | demand_empty_rest_of_line (); |
904a31bf AM |
1368 | |
1369 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1370 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1371 | } |
1372 | ||
1373 | void | |
dbe2df79 | 1374 | elf_obj_read_begin_hook (void) |
252b5132 RH |
1375 | { |
1376 | #ifdef NEED_ECOFF_DEBUG | |
1377 | if (ECOFF_DEBUGGING) | |
1378 | ecoff_read_begin_hook (); | |
1379 | #endif | |
1380 | } | |
1381 | ||
1382 | void | |
dbe2df79 | 1383 | elf_obj_symbol_new_hook (symbolS *symbolP) |
252b5132 | 1384 | { |
49309057 ILT |
1385 | struct elf_obj_sy *sy_obj; |
1386 | ||
1387 | sy_obj = symbol_get_obj (symbolP); | |
1388 | sy_obj->size = NULL; | |
1389 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1390 | |
1391 | #ifdef NEED_ECOFF_DEBUG | |
1392 | if (ECOFF_DEBUGGING) | |
1393 | ecoff_symbol_new_hook (symbolP); | |
1394 | #endif | |
1395 | } | |
1396 | ||
8fd3e36b AM |
1397 | /* When setting one symbol equal to another, by default we probably |
1398 | want them to have the same "size", whatever it means in the current | |
1399 | context. */ | |
1400 | ||
1401 | void | |
dbe2df79 | 1402 | elf_copy_symbol_attributes (symbolS *dest, symbolS *src) |
8fd3e36b | 1403 | { |
060adf0e AM |
1404 | struct elf_obj_sy *srcelf = symbol_get_obj (src); |
1405 | struct elf_obj_sy *destelf = symbol_get_obj (dest); | |
1406 | if (srcelf->size) | |
1407 | { | |
1408 | if (destelf->size == NULL) | |
dbe2df79 | 1409 | destelf->size = xmalloc (sizeof (expressionS)); |
060adf0e AM |
1410 | *destelf->size = *srcelf->size; |
1411 | } | |
1412 | else | |
1413 | { | |
1414 | if (destelf->size != NULL) | |
1415 | free (destelf->size); | |
1416 | destelf->size = NULL; | |
1417 | } | |
1418 | S_SET_SIZE (dest, S_GET_SIZE (src)); | |
26eb4093 JJ |
1419 | /* Don't copy visibility. */ |
1420 | S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest)) | |
1421 | | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1)))); | |
8fd3e36b AM |
1422 | } |
1423 | ||
252b5132 | 1424 | void |
dbe2df79 | 1425 | obj_elf_version (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1426 | { |
1427 | char *name; | |
1428 | unsigned int c; | |
252b5132 RH |
1429 | char *p; |
1430 | asection *seg = now_seg; | |
1431 | subsegT subseg = now_subseg; | |
1432 | Elf_Internal_Note i_note; | |
1433 | Elf_External_Note e_note; | |
dbe2df79 | 1434 | asection *note_secp = NULL; |
252b5132 RH |
1435 | |
1436 | SKIP_WHITESPACE (); | |
1437 | if (*input_line_pointer == '\"') | |
1438 | { | |
6afdfa61 NC |
1439 | unsigned int len; |
1440 | ||
bf514e21 | 1441 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1442 | name = input_line_pointer; |
1443 | ||
1444 | while (is_a_char (c = next_char_of_string ())) | |
1445 | ; | |
1446 | c = *input_line_pointer; | |
1447 | *input_line_pointer = '\0'; | |
1448 | *(input_line_pointer - 1) = '\0'; | |
1449 | *input_line_pointer = c; | |
1450 | ||
6afdfa61 | 1451 | /* Create the .note section. */ |
252b5132 RH |
1452 | note_secp = subseg_new (".note", 0); |
1453 | bfd_set_section_flags (stdoutput, | |
1454 | note_secp, | |
1455 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1456 | ||
6afdfa61 NC |
1457 | /* Process the version string. */ |
1458 | len = strlen (name) + 1; | |
252b5132 | 1459 | |
6afdfa61 NC |
1460 | /* PR 3456: Although the name field is padded out to an 4-byte |
1461 | boundary, the namesz field should not be adjusted. */ | |
1462 | i_note.namesz = len; | |
1463 | i_note.descsz = 0; /* No description. */ | |
252b5132 RH |
1464 | i_note.type = NT_VERSION; |
1465 | p = frag_more (sizeof (e_note.namesz)); | |
dbe2df79 | 1466 | md_number_to_chars (p, i_note.namesz, sizeof (e_note.namesz)); |
252b5132 | 1467 | p = frag_more (sizeof (e_note.descsz)); |
dbe2df79 | 1468 | md_number_to_chars (p, i_note.descsz, sizeof (e_note.descsz)); |
252b5132 | 1469 | p = frag_more (sizeof (e_note.type)); |
dbe2df79 | 1470 | md_number_to_chars (p, i_note.type, sizeof (e_note.type)); |
6afdfa61 | 1471 | p = frag_more (len); |
5ab504f9 | 1472 | memcpy (p, name, len); |
252b5132 | 1473 | |
252b5132 RH |
1474 | frag_align (2, 0, 0); |
1475 | ||
1476 | subseg_set (seg, subseg); | |
1477 | } | |
1478 | else | |
6afdfa61 NC |
1479 | as_bad (_("expected quoted string")); |
1480 | ||
252b5132 RH |
1481 | demand_empty_rest_of_line (); |
1482 | } | |
1483 | ||
1484 | static void | |
dbe2df79 | 1485 | obj_elf_size (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1486 | { |
1487 | char *name = input_line_pointer; | |
1488 | char c = get_symbol_end (); | |
1489 | char *p; | |
1490 | expressionS exp; | |
1491 | symbolS *sym; | |
1492 | ||
1493 | p = input_line_pointer; | |
1494 | *p = c; | |
1495 | SKIP_WHITESPACE (); | |
1496 | if (*input_line_pointer != ',') | |
1497 | { | |
1498 | *p = 0; | |
1499 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1500 | *p = c; | |
1501 | ignore_rest_of_line (); | |
1502 | return; | |
1503 | } | |
1504 | input_line_pointer++; | |
1505 | expression (&exp); | |
1506 | if (exp.X_op == O_absent) | |
1507 | { | |
1508 | as_bad (_("missing expression in .size directive")); | |
1509 | exp.X_op = O_constant; | |
1510 | exp.X_add_number = 0; | |
1511 | } | |
1512 | *p = 0; | |
1513 | sym = symbol_find_or_make (name); | |
1514 | *p = c; | |
1515 | if (exp.X_op == O_constant) | |
c538998c JJ |
1516 | { |
1517 | S_SET_SIZE (sym, exp.X_add_number); | |
1518 | if (symbol_get_obj (sym)->size) | |
1519 | { | |
1520 | xfree (symbol_get_obj (sym)->size); | |
1521 | symbol_get_obj (sym)->size = NULL; | |
1522 | } | |
1523 | } | |
252b5132 RH |
1524 | else |
1525 | { | |
dbe2df79 | 1526 | symbol_get_obj (sym)->size = xmalloc (sizeof (expressionS)); |
49309057 | 1527 | *symbol_get_obj (sym)->size = exp; |
252b5132 RH |
1528 | } |
1529 | demand_empty_rest_of_line (); | |
1530 | } | |
1531 | ||
1532 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
aa8c34c3 | 1533 | There are five syntaxes: |
fa306131 | 1534 | |
252b5132 RH |
1535 | The first (used on Solaris) is |
1536 | .type SYM,#function | |
1537 | The second (used on UnixWare) is | |
1538 | .type SYM,@function | |
1539 | The third (reportedly to be used on Irix 6.0) is | |
1540 | .type SYM STT_FUNC | |
1541 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1542 | .type SYM,%function | |
aa8c34c3 JE |
1543 | The fifth (used on SVR4/860) is |
1544 | .type SYM,"function" | |
252b5132 RH |
1545 | */ |
1546 | ||
1547 | static void | |
dbe2df79 | 1548 | obj_elf_type (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1549 | { |
1550 | char *name; | |
1551 | char c; | |
1552 | int type; | |
1553 | const char *typename; | |
1554 | symbolS *sym; | |
904a31bf | 1555 | elf_symbol_type *elfsym; |
252b5132 RH |
1556 | |
1557 | name = input_line_pointer; | |
1558 | c = get_symbol_end (); | |
1559 | sym = symbol_find_or_make (name); | |
904a31bf | 1560 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 RH |
1561 | *input_line_pointer = c; |
1562 | ||
1563 | SKIP_WHITESPACE (); | |
1564 | if (*input_line_pointer == ',') | |
1565 | ++input_line_pointer; | |
1566 | ||
1567 | SKIP_WHITESPACE (); | |
1568 | if ( *input_line_pointer == '#' | |
1569 | || *input_line_pointer == '@' | |
aa8c34c3 | 1570 | || *input_line_pointer == '"' |
252b5132 RH |
1571 | || *input_line_pointer == '%') |
1572 | ++input_line_pointer; | |
1573 | ||
1574 | typename = input_line_pointer; | |
1575 | c = get_symbol_end (); | |
1576 | ||
1577 | type = 0; | |
1578 | if (strcmp (typename, "function") == 0 | |
1579 | || strcmp (typename, "STT_FUNC") == 0) | |
1580 | type = BSF_FUNCTION; | |
1581 | else if (strcmp (typename, "object") == 0 | |
1582 | || strcmp (typename, "STT_OBJECT") == 0) | |
1583 | type = BSF_OBJECT; | |
b9734f35 JJ |
1584 | else if (strcmp (typename, "tls_object") == 0 |
1585 | || strcmp (typename, "STT_TLS") == 0) | |
1586 | type = BSF_OBJECT | BSF_THREAD_LOCAL; | |
e7b9a8c1 L |
1587 | else if (strcmp (typename, "notype") == 0 |
1588 | || strcmp (typename, "STT_NOTYPE") == 0) | |
1589 | ; | |
904a31bf AM |
1590 | #ifdef md_elf_symbol_type |
1591 | else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1) | |
1592 | ; | |
1593 | #endif | |
252b5132 | 1594 | else |
6ce8b369 | 1595 | as_bad (_("unrecognized symbol type \"%s\""), typename); |
252b5132 RH |
1596 | |
1597 | *input_line_pointer = c; | |
1598 | ||
aa8c34c3 JE |
1599 | if (*input_line_pointer == '"') |
1600 | ++input_line_pointer; | |
1601 | ||
904a31bf | 1602 | elfsym->symbol.flags |= type; |
252b5132 RH |
1603 | |
1604 | demand_empty_rest_of_line (); | |
1605 | } | |
1606 | ||
1607 | static void | |
dbe2df79 | 1608 | obj_elf_ident (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1609 | { |
1610 | static segT comment_section; | |
1611 | segT old_section = now_seg; | |
1612 | int old_subsection = now_subseg; | |
1613 | ||
5f91fe03 ILT |
1614 | #ifdef md_flush_pending_output |
1615 | md_flush_pending_output (); | |
1616 | #endif | |
1617 | ||
252b5132 RH |
1618 | if (!comment_section) |
1619 | { | |
1620 | char *p; | |
1621 | comment_section = subseg_new (".comment", 0); | |
1622 | bfd_set_section_flags (stdoutput, comment_section, | |
1623 | SEC_READONLY | SEC_HAS_CONTENTS); | |
1624 | p = frag_more (1); | |
1625 | *p = 0; | |
1626 | } | |
1627 | else | |
1628 | subseg_set (comment_section, 0); | |
38a57ae7 | 1629 | stringer (8 + 1); |
252b5132 RH |
1630 | subseg_set (old_section, old_subsection); |
1631 | } | |
1632 | ||
1633 | #ifdef INIT_STAB_SECTION | |
1634 | ||
1635 | /* The first entry in a .stabs section is special. */ | |
1636 | ||
1637 | void | |
dbe2df79 | 1638 | obj_elf_init_stab_section (segT seg) |
252b5132 RH |
1639 | { |
1640 | char *file; | |
1641 | char *p; | |
1642 | char *stabstr_name; | |
1643 | unsigned int stroff; | |
1644 | ||
1645 | /* Force the section to align to a longword boundary. Without this, | |
1646 | UnixWare ar crashes. */ | |
1647 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1648 | ||
bf514e21 | 1649 | /* Make space for this first symbol. */ |
252b5132 | 1650 | p = frag_more (12); |
bf514e21 | 1651 | /* Zero it out. */ |
252b5132 | 1652 | memset (p, 0, 12); |
dbe2df79 AM |
1653 | as_where (&file, NULL); |
1654 | stabstr_name = xmalloc (strlen (segment_name (seg)) + 4); | |
252b5132 RH |
1655 | strcpy (stabstr_name, segment_name (seg)); |
1656 | strcat (stabstr_name, "str"); | |
1657 | stroff = get_stab_string_offset (file, stabstr_name); | |
1658 | know (stroff == 1); | |
1659 | md_number_to_chars (p, stroff, 4); | |
1660 | seg_info (seg)->stabu.p = p; | |
1661 | } | |
1662 | ||
1663 | #endif | |
1664 | ||
1665 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1666 | ||
1667 | static void | |
dbe2df79 | 1668 | adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1669 | { |
1670 | char *name; | |
1671 | asection *strsec; | |
1672 | char *p; | |
1673 | int strsz, nsyms; | |
1674 | ||
1675 | if (strncmp (".stab", sec->name, 5)) | |
1676 | return; | |
1677 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1678 | return; | |
1679 | ||
dbe2df79 | 1680 | name = alloca (strlen (sec->name) + 4); |
252b5132 RH |
1681 | strcpy (name, sec->name); |
1682 | strcat (name, "str"); | |
1683 | strsec = bfd_get_section_by_name (abfd, name); | |
1684 | if (strsec) | |
1685 | strsz = bfd_section_size (abfd, strsec); | |
1686 | else | |
1687 | strsz = 0; | |
1688 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1689 | ||
1690 | p = seg_info (sec)->stabu.p; | |
1691 | assert (p != 0); | |
1692 | ||
dbe2df79 AM |
1693 | bfd_h_put_16 (abfd, nsyms, p + 6); |
1694 | bfd_h_put_32 (abfd, strsz, p + 8); | |
252b5132 RH |
1695 | } |
1696 | ||
1697 | #ifdef NEED_ECOFF_DEBUG | |
1698 | ||
1699 | /* This function is called by the ECOFF code. It is supposed to | |
1700 | record the external symbol information so that the backend can | |
1701 | write it out correctly. The ELF backend doesn't actually handle | |
1702 | this at the moment, so we do it ourselves. We save the information | |
1703 | in the symbol. */ | |
1704 | ||
ae4a729b AM |
1705 | #ifdef OBJ_MAYBE_ELF |
1706 | static | |
1707 | #endif | |
252b5132 | 1708 | void |
dbe2df79 | 1709 | elf_ecoff_set_ext (symbolS *sym, struct ecoff_extr *ext) |
252b5132 | 1710 | { |
dbe2df79 | 1711 | symbol_get_bfdsym (sym)->udata.p = ext; |
252b5132 RH |
1712 | } |
1713 | ||
1714 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1715 | supposed to *EXT to the external symbol information, and return | |
1716 | whether the symbol should be used at all. */ | |
1717 | ||
b34976b6 | 1718 | static bfd_boolean |
dbe2df79 | 1719 | elf_get_extr (asymbol *sym, EXTR *ext) |
252b5132 RH |
1720 | { |
1721 | if (sym->udata.p == NULL) | |
b34976b6 | 1722 | return FALSE; |
252b5132 | 1723 | *ext = *(EXTR *) sym->udata.p; |
b34976b6 | 1724 | return TRUE; |
252b5132 RH |
1725 | } |
1726 | ||
1727 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1728 | nothing to do for ELF. */ | |
1729 | ||
252b5132 | 1730 | static void |
dbe2df79 AM |
1731 | elf_set_index (asymbol *sym ATTRIBUTE_UNUSED, |
1732 | bfd_size_type indx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1733 | { |
1734 | } | |
1735 | ||
1736 | #endif /* NEED_ECOFF_DEBUG */ | |
1737 | ||
1738 | void | |
dbe2df79 | 1739 | elf_frob_symbol (symbolS *symp, int *puntp) |
252b5132 | 1740 | { |
49309057 ILT |
1741 | struct elf_obj_sy *sy_obj; |
1742 | ||
252b5132 RH |
1743 | #ifdef NEED_ECOFF_DEBUG |
1744 | if (ECOFF_DEBUGGING) | |
1745 | ecoff_frob_symbol (symp); | |
1746 | #endif | |
1747 | ||
49309057 ILT |
1748 | sy_obj = symbol_get_obj (symp); |
1749 | ||
1750 | if (sy_obj->size != NULL) | |
252b5132 | 1751 | { |
49309057 | 1752 | switch (sy_obj->size->X_op) |
252b5132 RH |
1753 | { |
1754 | case O_subtract: | |
1755 | S_SET_SIZE (symp, | |
49309057 ILT |
1756 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1757 | + sy_obj->size->X_add_number | |
1758 | - S_GET_VALUE (sy_obj->size->X_op_symbol))); | |
252b5132 RH |
1759 | break; |
1760 | case O_constant: | |
1761 | S_SET_SIZE (symp, | |
49309057 ILT |
1762 | (S_GET_VALUE (sy_obj->size->X_add_symbol) |
1763 | + sy_obj->size->X_add_number)); | |
252b5132 RH |
1764 | break; |
1765 | default: | |
1766 | as_bad (_(".size expression too complicated to fix up")); | |
1767 | break; | |
1768 | } | |
49309057 ILT |
1769 | free (sy_obj->size); |
1770 | sy_obj->size = NULL; | |
252b5132 RH |
1771 | } |
1772 | ||
49309057 | 1773 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1774 | { |
79082ff0 L |
1775 | char *p; |
1776 | ||
1777 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1778 | know (p != NULL); | |
1779 | ||
252b5132 RH |
1780 | /* This symbol was given a new name with the .symver directive. |
1781 | ||
13c56984 AM |
1782 | If this is an external reference, just rename the symbol to |
1783 | include the version string. This will make the relocs be | |
1784 | against the correct versioned symbol. | |
252b5132 RH |
1785 | |
1786 | If this is a definition, add an alias. FIXME: Using an alias | |
1787 | will permit the debugging information to refer to the right | |
1788 | symbol. However, it's not clear whether it is the best | |
1789 | approach. */ | |
1790 | ||
1791 | if (! S_IS_DEFINED (symp)) | |
1792 | { | |
252b5132 | 1793 | /* Verify that the name isn't using the @@ syntax--this is |
13c56984 AM |
1794 | reserved for definitions of the default version to link |
1795 | against. */ | |
252b5132 RH |
1796 | if (p[1] == ELF_VER_CHR) |
1797 | { | |
1798 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1799 | sy_obj->versioned_name); |
b34976b6 | 1800 | *puntp = TRUE; |
252b5132 | 1801 | } |
49309057 | 1802 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1803 | } |
1804 | else | |
1805 | { | |
dbe2df79 | 1806 | if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR) |
79082ff0 L |
1807 | { |
1808 | size_t l; | |
1809 | ||
1810 | /* The @@@ syntax is a special case. It renames the | |
1811 | symbol name to versioned_name with one `@' removed. */ | |
1812 | l = strlen (&p[3]) + 1; | |
dbe2df79 | 1813 | memmove (&p[2], &p[3], l); |
79082ff0 L |
1814 | S_SET_NAME (symp, sy_obj->versioned_name); |
1815 | } | |
1816 | else | |
1817 | { | |
1818 | symbolS *symp2; | |
252b5132 | 1819 | |
79082ff0 L |
1820 | /* FIXME: Creating a new symbol here is risky. We're |
1821 | in the final loop over the symbol table. We can | |
1822 | get away with it only because the symbol goes to | |
1823 | the end of the list, where the loop will still see | |
1824 | it. It would probably be better to do this in | |
1825 | obj_frob_file_before_adjust. */ | |
252b5132 | 1826 | |
79082ff0 | 1827 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1828 | |
79082ff0 | 1829 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1830 | |
79082ff0 | 1831 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1832 | |
79082ff0 L |
1833 | /* Subtracting out the frag address here is a hack |
1834 | because we are in the middle of the final loop. */ | |
1835 | S_SET_VALUE (symp2, | |
1836 | (S_GET_VALUE (symp) | |
1837 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1838 | |
79082ff0 | 1839 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1840 | |
79082ff0 L |
1841 | /* This will copy over the size information. */ |
1842 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1843 | |
26eb4093 JJ |
1844 | S_SET_OTHER (symp2, S_GET_OTHER (symp)); |
1845 | ||
79082ff0 L |
1846 | if (S_IS_WEAK (symp)) |
1847 | S_SET_WEAK (symp2); | |
252b5132 | 1848 | |
79082ff0 L |
1849 | if (S_IS_EXTERNAL (symp)) |
1850 | S_SET_EXTERNAL (symp2); | |
1851 | } | |
252b5132 RH |
1852 | } |
1853 | } | |
1854 | ||
1855 | /* Double check weak symbols. */ | |
49309057 | 1856 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1857 | { |
1858 | if (S_IS_COMMON (symp)) | |
6ce8b369 | 1859 | as_bad (_("symbol `%s' can not be both weak and common"), |
252b5132 RH |
1860 | S_GET_NAME (symp)); |
1861 | } | |
1862 | ||
1863 | #ifdef TC_MIPS | |
1864 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
1865 | any undefined non-function symbol to STT_OBJECT. We try to be | |
1866 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
1867 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
1868 | because that is the only time gcc will generate the necessary | |
1869 | .global directives to mark functions. */ | |
1870 | ||
1871 | if (S_IS_COMMON (symp)) | |
49309057 | 1872 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
1873 | |
1874 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
1875 | && ! S_IS_DEFINED (symp) |
1876 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
1877 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 | 1878 | #endif |
252b5132 RH |
1879 | } |
1880 | ||
060adf0e AM |
1881 | struct group_list |
1882 | { | |
1883 | asection **head; /* Section lists. */ | |
1884 | unsigned int *elt_count; /* Number of sections in each list. */ | |
1885 | unsigned int num_group; /* Number of lists. */ | |
1886 | }; | |
1887 | ||
1888 | /* Called via bfd_map_over_sections. If SEC is a member of a group, | |
1889 | add it to a list of sections belonging to the group. INF is a | |
1890 | pointer to a struct group_list, which is where we store the head of | |
1891 | each list. */ | |
1892 | ||
1893 | static void | |
dbe2df79 | 1894 | build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) |
060adf0e | 1895 | { |
dbe2df79 | 1896 | struct group_list *list = inf; |
aa1f4858 | 1897 | const char *group_name = elf_group_name (sec); |
060adf0e AM |
1898 | unsigned int i; |
1899 | ||
1900 | if (group_name == NULL) | |
1901 | return; | |
1902 | ||
1903 | /* If this group already has a list, add the section to the head of | |
1904 | the list. */ | |
1905 | for (i = 0; i < list->num_group; i++) | |
1906 | { | |
aa1f4858 | 1907 | if (strcmp (group_name, elf_group_name (list->head[i])) == 0) |
060adf0e | 1908 | { |
aa1f4858 | 1909 | elf_next_in_group (sec) = list->head[i]; |
060adf0e AM |
1910 | list->head[i] = sec; |
1911 | list->elt_count[i] += 1; | |
1912 | return; | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | /* New group. Make the arrays bigger in chunks to minimize calls to | |
1917 | realloc. */ | |
1918 | i = list->num_group; | |
1919 | if ((i & 127) == 0) | |
1920 | { | |
1921 | unsigned int newsize = i + 128; | |
1922 | list->head = xrealloc (list->head, newsize * sizeof (*list->head)); | |
1923 | list->elt_count = xrealloc (list->elt_count, | |
1924 | newsize * sizeof (*list->elt_count)); | |
1925 | } | |
1926 | list->head[i] = sec; | |
1927 | list->elt_count[i] = 1; | |
1928 | list->num_group += 1; | |
1929 | } | |
1930 | ||
252b5132 | 1931 | void |
dbe2df79 | 1932 | elf_frob_file (void) |
252b5132 | 1933 | { |
060adf0e AM |
1934 | struct group_list list; |
1935 | unsigned int i; | |
1936 | ||
dbe2df79 | 1937 | bfd_map_over_sections (stdoutput, adjust_stab_sections, NULL); |
252b5132 | 1938 | |
060adf0e AM |
1939 | /* Go find section groups. */ |
1940 | list.num_group = 0; | |
1941 | list.head = NULL; | |
1942 | list.elt_count = NULL; | |
dbe2df79 | 1943 | bfd_map_over_sections (stdoutput, build_group_lists, &list); |
060adf0e AM |
1944 | |
1945 | /* Make the SHT_GROUP sections that describe each section group. We | |
1946 | can't set up the section contents here yet, because elf section | |
1947 | indices have yet to be calculated. elf.c:set_group_contents does | |
1948 | the rest of the work. */ | |
1949 | for (i = 0; i < list.num_group; i++) | |
1950 | { | |
aa1f4858 | 1951 | const char *group_name = elf_group_name (list.head[i]); |
9758f3fc | 1952 | const char *sec_name; |
060adf0e AM |
1953 | asection *s; |
1954 | flagword flags; | |
9758f3fc AM |
1955 | struct symbol *sy; |
1956 | int has_sym; | |
587aac4e | 1957 | bfd_size_type size; |
060adf0e | 1958 | |
060adf0e | 1959 | flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP; |
d2dab548 | 1960 | for (s = list.head[i]; s != NULL; s = elf_next_in_group (s)) |
68bfbfcc | 1961 | if ((s->flags ^ flags) & SEC_LINK_ONCE) |
d2dab548 AM |
1962 | { |
1963 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
1964 | if (s != list.head[i]) | |
1965 | { | |
1966 | as_warn (_("assuming all members of group `%s' are COMDAT"), | |
1967 | group_name); | |
1968 | break; | |
1969 | } | |
1970 | } | |
1971 | ||
9758f3fc AM |
1972 | sec_name = group_name; |
1973 | sy = symbol_find_exact (group_name); | |
1974 | has_sym = 0; | |
1975 | if (sy != NULL | |
1976 | && (sy == symbol_lastP | |
1977 | || (sy->sy_next != NULL | |
1978 | && sy->sy_next->sy_previous == sy))) | |
1979 | { | |
1980 | has_sym = 1; | |
1981 | sec_name = ".group"; | |
1982 | } | |
1983 | s = subseg_force_new (sec_name, 0); | |
060adf0e AM |
1984 | if (s == NULL |
1985 | || !bfd_set_section_flags (stdoutput, s, flags) | |
1986 | || !bfd_set_section_alignment (stdoutput, s, 2)) | |
1987 | { | |
1988 | as_fatal (_("can't create group: %s"), | |
1989 | bfd_errmsg (bfd_get_error ())); | |
1990 | } | |
2f89ff8d | 1991 | elf_section_type (s) = SHT_GROUP; |
060adf0e | 1992 | |
aa1f4858 AM |
1993 | /* Pass a pointer to the first section in this group. */ |
1994 | elf_next_in_group (s) = list.head[i]; | |
9758f3fc AM |
1995 | if (has_sym) |
1996 | elf_group_id (s) = sy->bsym; | |
060adf0e | 1997 | |
587aac4e AM |
1998 | size = 4 * (list.elt_count[i] + 1); |
1999 | bfd_set_section_size (stdoutput, s, size); | |
b7712f8d | 2000 | s->contents = (unsigned char *) frag_more (size); |
060adf0e | 2001 | frag_now->fr_fix = frag_now_fix_octets (); |
07cb2078 | 2002 | frag_wane (frag_now); |
060adf0e AM |
2003 | } |
2004 | ||
252b5132 RH |
2005 | #ifdef elf_tc_final_processing |
2006 | elf_tc_final_processing (); | |
2007 | #endif | |
2008 | } | |
2009 | ||
4a1805b1 | 2010 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
2011 | |
2012 | void | |
dbe2df79 | 2013 | elf_frob_file_before_adjust (void) |
339681c0 L |
2014 | { |
2015 | if (symbol_rootP) | |
2016 | { | |
2017 | symbolS *symp; | |
2018 | ||
2019 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
00e6e13d | 2020 | if (!S_IS_DEFINED (symp)) |
79082ff0 | 2021 | { |
00e6e13d | 2022 | if (symbol_get_obj (symp)->versioned_name) |
79082ff0 L |
2023 | { |
2024 | char *p; | |
2025 | ||
2026 | /* The @@@ syntax is a special case. If the symbol is | |
2027 | not defined, 2 `@'s will be removed from the | |
2028 | versioned_name. */ | |
2029 | ||
2030 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
2031 | ELF_VER_CHR); | |
2032 | know (p != NULL); | |
dbe2df79 | 2033 | if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR) |
79082ff0 L |
2034 | { |
2035 | size_t l = strlen (&p[3]) + 1; | |
dbe2df79 | 2036 | memmove (&p[1], &p[3], l); |
79082ff0 L |
2037 | } |
2038 | if (symbol_used_p (symp) == 0 | |
2039 | && symbol_used_in_reloc_p (symp) == 0) | |
2040 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2041 | } | |
00e6e13d JJ |
2042 | |
2043 | /* If there was .weak foo, but foo was neither defined nor | |
2044 | used anywhere, remove it. */ | |
2045 | ||
2046 | else if (S_IS_WEAK (symp) | |
2047 | && symbol_used_p (symp) == 0 | |
2048 | && symbol_used_in_reloc_p (symp) == 0) | |
2049 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
79082ff0 | 2050 | } |
339681c0 L |
2051 | } |
2052 | } | |
2053 | ||
252b5132 RH |
2054 | /* It is required that we let write_relocs have the opportunity to |
2055 | optimize away fixups before output has begun, since it is possible | |
2056 | to eliminate all fixups for a section and thus we never should | |
2057 | have generated the relocation section. */ | |
2058 | ||
2059 | void | |
dbe2df79 | 2060 | elf_frob_file_after_relocs (void) |
252b5132 RH |
2061 | { |
2062 | #ifdef NEED_ECOFF_DEBUG | |
2063 | if (ECOFF_DEBUGGING) | |
2064 | /* Generate the ECOFF debugging information. */ | |
2065 | { | |
2066 | const struct ecoff_debug_swap *debug_swap; | |
2067 | struct ecoff_debug_info debug; | |
2068 | char *buf; | |
2069 | asection *sec; | |
2070 | ||
2071 | debug_swap | |
2072 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
dbe2df79 | 2073 | know (debug_swap != NULL); |
252b5132 RH |
2074 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); |
2075 | ||
2076 | /* Set up the pointers in debug. */ | |
2077 | #define SET(ptr, offset, type) \ | |
2078 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
2079 | ||
2080 | SET (line, cbLineOffset, unsigned char *); | |
dbe2df79 AM |
2081 | SET (external_dnr, cbDnOffset, void *); |
2082 | SET (external_pdr, cbPdOffset, void *); | |
2083 | SET (external_sym, cbSymOffset, void *); | |
2084 | SET (external_opt, cbOptOffset, void *); | |
252b5132 RH |
2085 | SET (external_aux, cbAuxOffset, union aux_ext *); |
2086 | SET (ss, cbSsOffset, char *); | |
dbe2df79 AM |
2087 | SET (external_fdr, cbFdOffset, void *); |
2088 | SET (external_rfd, cbRfdOffset, void *); | |
252b5132 RH |
2089 | /* ssext and external_ext are set up just below. */ |
2090 | ||
2091 | #undef SET | |
2092 | ||
2093 | /* Set up the external symbols. */ | |
2094 | debug.ssext = debug.ssext_end = NULL; | |
2095 | debug.external_ext = debug.external_ext_end = NULL; | |
b34976b6 | 2096 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE, |
252b5132 | 2097 | elf_get_extr, elf_set_index)) |
6ce8b369 | 2098 | as_fatal (_("failed to set up debugging information: %s"), |
252b5132 RH |
2099 | bfd_errmsg (bfd_get_error ())); |
2100 | ||
2101 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
2102 | assert (sec != NULL); | |
2103 | ||
b34976b6 | 2104 | know (!stdoutput->output_has_begun); |
252b5132 RH |
2105 | |
2106 | /* We set the size of the section, call bfd_set_section_contents | |
2107 | to force the ELF backend to allocate a file position, and then | |
2108 | write out the data. FIXME: Is this really the best way to do | |
2109 | this? */ | |
587aac4e AM |
2110 | bfd_set_section_size |
2111 | (stdoutput, sec, bfd_ecoff_debug_size (stdoutput, &debug, debug_swap)); | |
252b5132 | 2112 | |
5f91fe03 | 2113 | /* Pass BUF to bfd_set_section_contents because this will |
13c56984 AM |
2114 | eventually become a call to fwrite, and ISO C prohibits |
2115 | passing a NULL pointer to a stdio function even if the | |
2116 | pointer will not be used. */ | |
dbe2df79 | 2117 | if (! bfd_set_section_contents (stdoutput, sec, buf, 0, 0)) |
6ce8b369 | 2118 | as_fatal (_("can't start writing .mdebug section: %s"), |
252b5132 RH |
2119 | bfd_errmsg (bfd_get_error ())); |
2120 | ||
b34976b6 | 2121 | know (stdoutput->output_has_begun); |
252b5132 RH |
2122 | know (sec->filepos != 0); |
2123 | ||
2124 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
2125 | sec->filepos)) | |
6ce8b369 | 2126 | as_fatal (_("could not write .mdebug section: %s"), |
252b5132 RH |
2127 | bfd_errmsg (bfd_get_error ())); |
2128 | } | |
2129 | #endif /* NEED_ECOFF_DEBUG */ | |
2130 | } | |
2131 | ||
2132 | #ifdef SCO_ELF | |
2133 | ||
aaa2624b | 2134 | /* Heavily plagiarized from obj_elf_version. The idea is to emit the |
252b5132 RH |
2135 | SCO specific identifier in the .notes section to satisfy the SCO |
2136 | linker. | |
2137 | ||
2138 | This looks more complicated than it really is. As opposed to the | |
2139 | "obvious" solution, this should handle the cross dev cases | |
2140 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
2141 | generating SCO Elf code) Efficiency isn't a concern, as there | |
2142 | should be exactly one of these sections per object module. | |
2143 | ||
2144 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
2145 | .note section. | |
2146 | ||
fa306131 AM |
2147 | int_32 namesz = 4 ; Name size |
2148 | int_32 descsz = 12 ; Descriptive information | |
2149 | int_32 type = 1 ; | |
2150 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
2151 | int_32 version = (major ver # << 16) | version of tools ; |
2152 | int_32 source = (tool_id << 16 ) | 1 ; | |
2153 | int_32 info = 0 ; These are set by the SCO tools, but we | |
13c56984 | 2154 | don't know enough about the source |
252b5132 RH |
2155 | environment to set them. SCO ld currently |
2156 | ignores them, and recommends we set them | |
2157 | to zero. */ | |
2158 | ||
2159 | #define SCO_MAJOR_VERSION 0x1 | |
2160 | #define SCO_MINOR_VERSION 0x1 | |
2161 | ||
2162 | void | |
dbe2df79 | 2163 | sco_id (void) |
252b5132 RH |
2164 | { |
2165 | ||
2166 | char *name; | |
2167 | unsigned int c; | |
2168 | char ch; | |
2169 | char *p; | |
2170 | asection *seg = now_seg; | |
2171 | subsegT subseg = now_subseg; | |
2172 | Elf_Internal_Note i_note; | |
2173 | Elf_External_Note e_note; | |
dbe2df79 | 2174 | asection *note_secp = NULL; |
252b5132 RH |
2175 | int i, len; |
2176 | ||
2177 | /* create the .note section */ | |
2178 | ||
2179 | note_secp = subseg_new (".note", 0); | |
2180 | bfd_set_section_flags (stdoutput, | |
2181 | note_secp, | |
2182 | SEC_HAS_CONTENTS | SEC_READONLY); | |
2183 | ||
2184 | /* process the version string */ | |
2185 | ||
fa306131 | 2186 | i_note.namesz = 4; |
252b5132 RH |
2187 | i_note.descsz = 12; /* 12 descriptive bytes */ |
2188 | i_note.type = NT_VERSION; /* Contains a version string */ | |
2189 | ||
2190 | p = frag_more (sizeof (i_note.namesz)); | |
dbe2df79 | 2191 | md_number_to_chars (p, i_note.namesz, 4); |
252b5132 RH |
2192 | |
2193 | p = frag_more (sizeof (i_note.descsz)); | |
dbe2df79 | 2194 | md_number_to_chars (p, i_note.descsz, 4); |
252b5132 RH |
2195 | |
2196 | p = frag_more (sizeof (i_note.type)); | |
dbe2df79 | 2197 | md_number_to_chars (p, i_note.type, 4); |
252b5132 RH |
2198 | |
2199 | p = frag_more (4); | |
fa306131 | 2200 | strcpy (p, "SCO"); |
252b5132 RH |
2201 | |
2202 | /* Note: this is the version number of the ELF we're representing */ | |
2203 | p = frag_more (4); | |
2204 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2205 | ||
2206 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2207 | it with SCO. The bottom bit shows that we are compat with the | |
2208 | SCO ABI. */ | |
2209 | p = frag_more (4); | |
2210 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2211 | ||
2212 | /* If we knew (or cared) what the source language options were, we'd | |
2213 | fill them in here. SCO has given us permission to ignore these | |
2214 | and just set them to zero. */ | |
2215 | p = frag_more (4); | |
2216 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2217 | |
252b5132 RH |
2218 | frag_align (2, 0, 0); |
2219 | ||
2220 | /* We probably can't restore the current segment, for there likely | |
2221 | isn't one yet... */ | |
2222 | if (seg && subseg) | |
2223 | subseg_set (seg, subseg); | |
2224 | ||
2225 | } | |
2226 | ||
2227 | #endif /* SCO_ELF */ | |
2228 | ||
5110c57e | 2229 | static int |
dbe2df79 | 2230 | elf_separate_stab_sections (void) |
5110c57e HPN |
2231 | { |
2232 | #ifdef NEED_ECOFF_DEBUG | |
2233 | return (!ECOFF_DEBUGGING); | |
2234 | #else | |
2235 | return 1; | |
2236 | #endif | |
2237 | } | |
2238 | ||
2239 | static void | |
dbe2df79 | 2240 | elf_init_stab_section (segT seg) |
5110c57e HPN |
2241 | { |
2242 | #ifdef NEED_ECOFF_DEBUG | |
2243 | if (!ECOFF_DEBUGGING) | |
2244 | #endif | |
2245 | obj_elf_init_stab_section (seg); | |
2246 | } | |
2247 | ||
252b5132 RH |
2248 | const struct format_ops elf_format_ops = |
2249 | { | |
2250 | bfd_target_elf_flavour, | |
4c63da97 AM |
2251 | 0, /* dfl_leading_underscore */ |
2252 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2253 | elf_begin, |
2254 | elf_file_symbol, | |
252b5132 RH |
2255 | elf_frob_symbol, |
2256 | elf_frob_file, | |
339681c0 | 2257 | elf_frob_file_before_adjust, |
a161fe53 | 2258 | 0, /* obj_frob_file_before_fix */ |
252b5132 RH |
2259 | elf_frob_file_after_relocs, |
2260 | elf_s_get_size, elf_s_set_size, | |
2261 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2262 | elf_s_get_other, |
5110c57e | 2263 | elf_s_set_other, |
4c63da97 | 2264 | 0, /* s_get_desc */ |
5110c57e HPN |
2265 | 0, /* s_set_desc */ |
2266 | 0, /* s_get_type */ | |
2267 | 0, /* s_set_type */ | |
252b5132 RH |
2268 | elf_copy_symbol_attributes, |
2269 | #ifdef NEED_ECOFF_DEBUG | |
2270 | ecoff_generate_asm_lineno, | |
2271 | ecoff_stab, | |
2272 | #else | |
4c63da97 AM |
2273 | 0, /* generate_asm_lineno */ |
2274 | 0, /* process_stab */ | |
252b5132 | 2275 | #endif |
5110c57e HPN |
2276 | elf_separate_stab_sections, |
2277 | elf_init_stab_section, | |
252b5132 RH |
2278 | elf_sec_sym_ok_for_reloc, |
2279 | elf_pop_insert, | |
2280 | #ifdef NEED_ECOFF_DEBUG | |
2281 | elf_ecoff_set_ext, | |
2282 | #else | |
4c63da97 | 2283 | 0, /* ecoff_set_ext */ |
252b5132 | 2284 | #endif |
4c63da97 | 2285 | elf_obj_read_begin_hook, |
5110c57e | 2286 | elf_obj_symbol_new_hook |
252b5132 | 2287 | }; |