Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF object file format |
cc8a6dd0 | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
e1e90034 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
ae4a729b | 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; | |
efa19bfd | 263 | unsigned int name_length; |
252b5132 | 264 | |
c04f5787 AM |
265 | sym = symbol_new (s, absolute_section, 0, NULL); |
266 | symbol_set_frag (sym, &zero_address_frag); | |
efa19bfd JB |
267 | |
268 | name_length = strlen (s); | |
269 | if (name_length > strlen (S_GET_NAME (sym))) | |
270 | { | |
271 | obstack_grow (¬es, s, name_length + 1); | |
1e9cc1c2 | 272 | S_SET_NAME (sym, (const char *) obstack_finish (¬es)); |
efa19bfd JB |
273 | } |
274 | else | |
275 | strcpy ((char *) S_GET_NAME (sym), s); | |
276 | ||
c04f5787 | 277 | symbol_get_bfdsym (sym)->flags |= BSF_FILE; |
252b5132 | 278 | |
c04f5787 AM |
279 | if (symbol_rootP != sym) |
280 | { | |
281 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
282 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
252b5132 | 283 | #ifdef DEBUG |
c04f5787 | 284 | verify_symbol_chain (symbol_rootP, symbol_lastP); |
252b5132 | 285 | #endif |
c04f5787 | 286 | } |
252b5132 RH |
287 | } |
288 | ||
289 | #ifdef NEED_ECOFF_DEBUG | |
f17c130b | 290 | ecoff_new_file (s, appfile); |
252b5132 RH |
291 | #endif |
292 | } | |
293 | ||
e13bab5a AM |
294 | /* Called from read.c:s_comm after we've parsed .comm symbol, size. |
295 | Parse a possible alignment value. */ | |
296 | ||
3b22753a | 297 | symbolS * |
e13bab5a | 298 | elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size) |
252b5132 | 299 | { |
e13bab5a AM |
300 | addressT align = 0; |
301 | int is_local = symbol_get_obj (symbolP)->local; | |
252b5132 | 302 | |
e13bab5a | 303 | if (*input_line_pointer == ',') |
9be1cda6 | 304 | { |
e13bab5a | 305 | char *save = input_line_pointer; |
9be1cda6 | 306 | |
252b5132 RH |
307 | input_line_pointer++; |
308 | SKIP_WHITESPACE (); | |
e13bab5a AM |
309 | |
310 | if (*input_line_pointer == '"') | |
252b5132 | 311 | { |
e13bab5a AM |
312 | /* For sparc. Accept .common symbol, length, "bss" */ |
313 | input_line_pointer++; | |
314 | /* Some use the dot, some don't. */ | |
315 | if (*input_line_pointer == '.') | |
316 | input_line_pointer++; | |
317 | /* Some say data, some say bss. */ | |
318 | if (strncmp (input_line_pointer, "bss\"", 4) == 0) | |
319 | input_line_pointer += 4; | |
320 | else if (strncmp (input_line_pointer, "data\"", 5) == 0) | |
321 | input_line_pointer += 5; | |
322 | else | |
252b5132 | 323 | { |
e13bab5a AM |
324 | char *p = input_line_pointer; |
325 | char c; | |
326 | ||
327 | while (*--p != '"') | |
328 | ; | |
329 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
330 | if (*input_line_pointer++ == '"') | |
331 | break; | |
332 | c = *input_line_pointer; | |
333 | *input_line_pointer = '\0'; | |
334 | as_bad (_("bad .common segment %s"), p); | |
335 | *input_line_pointer = c; | |
336 | ignore_rest_of_line (); | |
337 | return NULL; | |
252b5132 | 338 | } |
e13bab5a AM |
339 | /* ??? Don't ask me why these are always global. */ |
340 | is_local = 0; | |
252b5132 RH |
341 | } |
342 | else | |
343 | { | |
e13bab5a AM |
344 | input_line_pointer = save; |
345 | align = parse_align (is_local); | |
346 | if (align == (addressT) -1) | |
347 | return NULL; | |
252b5132 RH |
348 | } |
349 | } | |
e13bab5a AM |
350 | |
351 | if (is_local) | |
352 | { | |
353 | bss_alloc (symbolP, size, align); | |
354 | S_CLEAR_EXTERNAL (symbolP); | |
355 | } | |
252b5132 RH |
356 | else |
357 | { | |
e13bab5a AM |
358 | S_SET_VALUE (symbolP, size); |
359 | S_SET_ALIGN (symbolP, align); | |
360 | S_SET_EXTERNAL (symbolP); | |
3b22753a | 361 | S_SET_SEGMENT (symbolP, elf_com_section_ptr); |
252b5132 RH |
362 | } |
363 | ||
49309057 | 364 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
252b5132 | 365 | |
13ae64f3 | 366 | return symbolP; |
252b5132 RH |
367 | } |
368 | ||
13ae64f3 | 369 | void |
dbe2df79 | 370 | obj_elf_common (int is_common) |
13ae64f3 | 371 | { |
e13bab5a AM |
372 | if (flag_mri && is_common) |
373 | s_mri_common (0); | |
374 | else | |
375 | s_comm_internal (0, elf_common_parse); | |
13ae64f3 JJ |
376 | } |
377 | ||
378 | static void | |
dbe2df79 | 379 | obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED) |
13ae64f3 | 380 | { |
e13bab5a | 381 | symbolS *symbolP = s_comm_internal (0, elf_common_parse); |
13ae64f3 JJ |
382 | |
383 | if (symbolP) | |
384 | symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL; | |
385 | } | |
386 | ||
13c56984 AM |
387 | static void |
388 | obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED) | |
389 | { | |
390 | symbolS *symbolP = s_comm_internal (0, s_lcomm_internal); | |
391 | ||
392 | if (symbolP) | |
393 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; | |
394 | } | |
395 | ||
6e8bd58f NS |
396 | static symbolS * |
397 | get_sym_from_input_line_and_check (void) | |
398 | { | |
399 | char *name; | |
400 | char c; | |
401 | symbolS *sym; | |
402 | ||
403 | name = input_line_pointer; | |
404 | c = get_symbol_end (); | |
405 | sym = symbol_find_or_make (name); | |
406 | *input_line_pointer = c; | |
407 | SKIP_WHITESPACE (); | |
408 | ||
409 | /* There is no symbol name if input_line_pointer has not moved. */ | |
410 | if (name == input_line_pointer) | |
411 | as_bad (_("Missing symbol name in directive")); | |
412 | return sym; | |
413 | } | |
414 | ||
252b5132 | 415 | static void |
dbe2df79 | 416 | obj_elf_local (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 417 | { |
252b5132 RH |
418 | int c; |
419 | symbolS *symbolP; | |
420 | ||
421 | do | |
422 | { | |
01642c12 | 423 | symbolP = get_sym_from_input_line_and_check (); |
6e8bd58f | 424 | c = *input_line_pointer; |
252b5132 | 425 | S_CLEAR_EXTERNAL (symbolP); |
49309057 | 426 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
427 | if (c == ',') |
428 | { | |
429 | input_line_pointer++; | |
430 | SKIP_WHITESPACE (); | |
431 | if (*input_line_pointer == '\n') | |
432 | c = '\n'; | |
433 | } | |
434 | } | |
435 | while (c == ','); | |
436 | demand_empty_rest_of_line (); | |
437 | } | |
438 | ||
439 | static void | |
dbe2df79 | 440 | obj_elf_weak (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 441 | { |
252b5132 RH |
442 | int c; |
443 | symbolS *symbolP; | |
444 | ||
445 | do | |
446 | { | |
01642c12 | 447 | symbolP = get_sym_from_input_line_and_check (); |
6e8bd58f | 448 | c = *input_line_pointer; |
252b5132 | 449 | S_SET_WEAK (symbolP); |
49309057 | 450 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
451 | if (c == ',') |
452 | { | |
453 | input_line_pointer++; | |
454 | SKIP_WHITESPACE (); | |
455 | if (*input_line_pointer == '\n') | |
456 | c = '\n'; | |
457 | } | |
458 | } | |
459 | while (c == ','); | |
460 | demand_empty_rest_of_line (); | |
461 | } | |
462 | ||
2e13b764 | 463 | static void |
dbe2df79 | 464 | obj_elf_visibility (int visibility) |
2e13b764 | 465 | { |
2e13b764 NC |
466 | int c; |
467 | symbolS *symbolP; | |
468 | asymbol *bfdsym; | |
469 | elf_symbol_type *elfsym; | |
470 | ||
471 | do | |
472 | { | |
6e8bd58f | 473 | symbolP = get_sym_from_input_line_and_check (); |
fa306131 | 474 | |
2e13b764 NC |
475 | bfdsym = symbol_get_bfdsym (symbolP); |
476 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
fa306131 | 477 | |
9c2799c2 | 478 | gas_assert (elfsym); |
fa306131 | 479 | |
20e420c2 RH |
480 | elfsym->internal_elf_sym.st_other &= ~3; |
481 | elfsym->internal_elf_sym.st_other |= visibility; | |
fa306131 | 482 | |
6e8bd58f | 483 | c = *input_line_pointer; |
2e13b764 NC |
484 | if (c == ',') |
485 | { | |
486 | input_line_pointer ++; | |
fa306131 | 487 | |
2e13b764 | 488 | SKIP_WHITESPACE (); |
fa306131 | 489 | |
2e13b764 NC |
490 | if (*input_line_pointer == '\n') |
491 | c = '\n'; | |
492 | } | |
493 | } | |
494 | while (c == ','); | |
fa306131 | 495 | |
2e13b764 NC |
496 | demand_empty_rest_of_line (); |
497 | } | |
498 | ||
252b5132 RH |
499 | static segT previous_section; |
500 | static int previous_subsection; | |
501 | ||
9de8d8f1 RH |
502 | struct section_stack |
503 | { | |
504 | struct section_stack *next; | |
505 | segT seg, prev_seg; | |
506 | int subseg, prev_subseg; | |
507 | }; | |
508 | ||
509 | static struct section_stack *section_stack; | |
510 | ||
fafe6678 | 511 | static bfd_boolean |
86654c12 L |
512 | get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) |
513 | { | |
1e9cc1c2 | 514 | const char *gname = (const char *) inf; |
86654c12 | 515 | const char *group_name = elf_group_name (sec); |
01fb1836 | 516 | |
fafe6678 | 517 | return (group_name == gname |
86654c12 | 518 | || (group_name != NULL |
fafe6678 L |
519 | && gname != NULL |
520 | && strcmp (group_name, gname) == 0)); | |
86654c12 L |
521 | } |
522 | ||
252b5132 RH |
523 | /* Handle the .section pseudo-op. This code supports two different |
524 | syntaxes. | |
525 | ||
526 | The first is found on Solaris, and looks like | |
527 | .section ".sec1",#alloc,#execinstr,#write | |
528 | Here the names after '#' are the SHF_* flags to turn on for the | |
529 | section. I'm not sure how it determines the SHT_* type (BFD | |
530 | doesn't really give us control over the type, anyhow). | |
531 | ||
532 | The second format is found on UnixWare, and probably most SVR4 | |
533 | machines, and looks like | |
534 | .section .sec1,"a",@progbits | |
535 | The quoted string may contain any combination of a, w, x, and | |
536 | represents the SHF_* flags to turn on for the section. The string | |
537 | beginning with '@' can be progbits or nobits. There should be | |
538 | other possibilities, but I don't know what they are. In any case, | |
539 | BFD doesn't really let us set the section type. */ | |
540 | ||
cca86cc8 | 541 | void |
dbe2df79 AM |
542 | obj_elf_change_section (const char *name, |
543 | int type, | |
01e1a5bc | 544 | bfd_vma attr, |
dbe2df79 AM |
545 | int entsize, |
546 | const char *group_name, | |
547 | int linkonce, | |
548 | int push) | |
252b5132 | 549 | { |
fafe6678 | 550 | asection *old_sec; |
252b5132 | 551 | segT sec; |
742f45cf | 552 | flagword flags; |
551b43fd | 553 | const struct elf_backend_data *bed; |
f61e8019 | 554 | const struct bfd_elf_special_section *ssect; |
252b5132 RH |
555 | |
556 | #ifdef md_flush_pending_output | |
557 | md_flush_pending_output (); | |
558 | #endif | |
559 | ||
9de8d8f1 RH |
560 | /* Switch to the section, creating it if necessary. */ |
561 | if (push) | |
562 | { | |
563 | struct section_stack *elt; | |
1e9cc1c2 | 564 | elt = (struct section_stack *) xmalloc (sizeof (struct section_stack)); |
9de8d8f1 RH |
565 | elt->next = section_stack; |
566 | elt->seg = now_seg; | |
567 | elt->prev_seg = previous_section; | |
568 | elt->subseg = now_subseg; | |
569 | elt->prev_subseg = previous_subsection; | |
570 | section_stack = elt; | |
571 | } | |
572 | previous_section = now_seg; | |
573 | previous_subsection = now_subseg; | |
574 | ||
fafe6678 L |
575 | old_sec = bfd_get_section_by_name_if (stdoutput, name, get_section, |
576 | (void *) group_name); | |
577 | if (old_sec) | |
86654c12 | 578 | { |
fafe6678 | 579 | sec = old_sec; |
86654c12 L |
580 | subseg_set (sec, 0); |
581 | } | |
582 | else | |
583 | sec = subseg_force_new (name, 0); | |
584 | ||
551b43fd AM |
585 | bed = get_elf_backend_data (stdoutput); |
586 | ssect = (*bed->get_sec_type_attr) (stdoutput, sec); | |
9de8d8f1 | 587 | |
f61e8019 | 588 | if (ssect != NULL) |
2f89ff8d | 589 | { |
ea8f8eab L |
590 | bfd_boolean override = FALSE; |
591 | ||
2f89ff8d | 592 | if (type == SHT_NULL) |
f61e8019 AM |
593 | type = ssect->type; |
594 | else if (type != ssect->type) | |
2f89ff8d | 595 | { |
fafe6678 | 596 | if (old_sec == NULL |
23ddb850 | 597 | /* Some older versions of gcc will emit |
7ed1d346 | 598 | |
2f89ff8d | 599 | .section .init_array,"aw",@progbits |
7ed1d346 | 600 | |
2f89ff8d | 601 | for __attribute__ ((section (".init_array"))). |
3b22753a | 602 | "@progbits" is incorrect. Also for x86-64 large bss |
23ddb850 | 603 | sections, some older versions of gcc will emit |
3b22753a L |
604 | |
605 | .section .lbss,"aw",@progbits | |
606 | ||
2f89ff8d | 607 | "@progbits" is incorrect. */ |
3b22753a L |
608 | #ifdef TC_I386 |
609 | && (bed->s->arch_size != 64 | |
610 | || !(ssect->attr & SHF_X86_64_LARGE)) | |
611 | #endif | |
f61e8019 AM |
612 | && ssect->type != SHT_INIT_ARRAY |
613 | && ssect->type != SHT_FINI_ARRAY | |
614 | && ssect->type != SHT_PREINIT_ARRAY) | |
2f89ff8d L |
615 | { |
616 | /* We allow to specify any type for a .note section. */ | |
f61e8019 | 617 | if (ssect->type != SHT_NOTE) |
2f89ff8d L |
618 | as_warn (_("setting incorrect section type for %s"), |
619 | name); | |
620 | } | |
621 | else | |
622 | { | |
623 | as_warn (_("ignoring incorrect section type for %s"), | |
742f45cf | 624 | name); |
f61e8019 | 625 | type = ssect->type; |
2f89ff8d L |
626 | } |
627 | } | |
628 | ||
fafe6678 | 629 | if (old_sec == NULL && (attr & ~ssect->attr) != 0) |
2f89ff8d L |
630 | { |
631 | /* As a GNU extension, we permit a .note section to be | |
f61e8019 | 632 | allocatable. If the linker sees an allocatable .note |
2f89ff8d | 633 | section, it will create a PT_NOTE segment in the output |
92191b29 | 634 | file. We also allow "x" for .note.GNU-stack. */ |
f61e8019 AM |
635 | if (ssect->type == SHT_NOTE |
636 | && (attr == SHF_ALLOC || attr == SHF_EXECINSTR)) | |
637 | ; | |
638 | /* Allow different SHF_MERGE and SHF_STRINGS if we have | |
639 | something like .rodata.str. */ | |
640 | else if (ssect->suffix_length == -2 | |
641 | && name[ssect->prefix_length] == '.' | |
ea8f8eab L |
642 | && (attr |
643 | & ~ssect->attr | |
644 | & ~SHF_MERGE | |
645 | & ~SHF_STRINGS) == 0) | |
f61e8019 | 646 | ; |
ea8f8eab L |
647 | /* .interp, .strtab and .symtab can have SHF_ALLOC. */ |
648 | else if (attr == SHF_ALLOC | |
649 | && (strcmp (name, ".interp") == 0 | |
650 | || strcmp (name, ".strtab") == 0 | |
651 | || strcmp (name, ".symtab") == 0)) | |
652 | override = TRUE; | |
b9f18452 L |
653 | /* .note.GNU-stack can have SHF_EXECINSTR. */ |
654 | else if (attr == SHF_EXECINSTR | |
655 | && strcmp (name, ".note.GNU-stack") == 0) | |
656 | override = TRUE; | |
7f841127 L |
657 | #ifdef TC_ALPHA |
658 | /* A section on Alpha may have SHF_ALPHA_GPREL. */ | |
659 | else if ((attr & ~ssect->attr) == SHF_ALPHA_GPREL) | |
660 | override = TRUE; | |
661 | #endif | |
f61e8019 | 662 | else |
ea8f8eab | 663 | { |
86654c12 L |
664 | if (group_name == NULL) |
665 | as_warn (_("setting incorrect section attributes for %s"), | |
666 | name); | |
ea8f8eab L |
667 | override = TRUE; |
668 | } | |
2f89ff8d | 669 | } |
fafe6678 | 670 | if (!override && old_sec == NULL) |
f61e8019 | 671 | attr |= ssect->attr; |
2f89ff8d | 672 | } |
742f45cf AM |
673 | |
674 | /* Convert ELF type and flags to BFD flags. */ | |
675 | flags = (SEC_RELOC | |
676 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
677 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) | |
678 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
f5fa8ca2 JJ |
679 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0) |
680 | | ((attr & SHF_MERGE) ? SEC_MERGE : 0) | |
13ae64f3 | 681 | | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0) |
18ae9cc1 | 682 | | ((attr & SHF_EXCLUDE) ? SEC_EXCLUDE: 0) |
13ae64f3 | 683 | | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0)); |
9de8d8f1 | 684 | #ifdef md_elf_section_flags |
742f45cf | 685 | flags = md_elf_section_flags (flags, attr, type); |
9de8d8f1 RH |
686 | #endif |
687 | ||
86654c12 L |
688 | if (linkonce) |
689 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
690 | ||
fafe6678 | 691 | if (old_sec == NULL) |
742f45cf AM |
692 | { |
693 | symbolS *secsym; | |
694 | ||
94be91de JB |
695 | if (type == SHT_NULL) |
696 | type = bfd_elf_get_default_section_type (flags); | |
7a6d0b32 JB |
697 | elf_section_type (sec) = type; |
698 | elf_section_flags (sec) = attr; | |
699 | ||
9de8d8f1 RH |
700 | /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */ |
701 | if (type == SHT_NOBITS) | |
13c56984 | 702 | seg_info (sec)->bss = 1; |
9de8d8f1 RH |
703 | |
704 | bfd_set_section_flags (stdoutput, sec, flags); | |
f5fa8ca2 JJ |
705 | if (flags & SEC_MERGE) |
706 | sec->entsize = entsize; | |
aa1f4858 | 707 | elf_group_name (sec) = group_name; |
9de8d8f1 RH |
708 | |
709 | /* Add a symbol for this section to the symbol table. */ | |
710 | secsym = symbol_find (name); | |
711 | if (secsym != NULL) | |
712 | symbol_set_bfdsym (secsym, sec->symbol); | |
713 | else | |
13c56984 | 714 | symbol_table_insert (section_symbol (sec)); |
9de8d8f1 | 715 | } |
7a6d0b32 | 716 | else |
742f45cf | 717 | { |
7a6d0b32 JB |
718 | if (type != SHT_NULL |
719 | && (unsigned) type != elf_section_type (old_sec)) | |
720 | as_warn (_("ignoring changed section type for %s"), name); | |
721 | ||
722 | if (attr != 0) | |
723 | { | |
724 | /* If section attributes are specified the second time we see a | |
725 | particular section, then check that they are the same as we | |
726 | saw the first time. */ | |
727 | if (((old_sec->flags ^ flags) | |
728 | & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
729 | | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS | |
730 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
731 | | SEC_THREAD_LOCAL))) | |
732 | as_warn (_("ignoring changed section attributes for %s"), name); | |
733 | if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize) | |
734 | as_warn (_("ignoring changed section entity size for %s"), name); | |
735 | } | |
742f45cf | 736 | } |
9de8d8f1 RH |
737 | |
738 | #ifdef md_elf_section_change_hook | |
742f45cf | 739 | md_elf_section_change_hook (); |
9de8d8f1 RH |
740 | #endif |
741 | } | |
742 | ||
01e1a5bc | 743 | static bfd_vma |
01642c12 | 744 | obj_elf_parse_section_letters (char *str, size_t len, bfd_boolean *clone) |
9de8d8f1 | 745 | { |
01e1a5bc | 746 | bfd_vma attr = 0; |
01642c12 | 747 | *clone = FALSE; |
9de8d8f1 RH |
748 | |
749 | while (len > 0) | |
750 | { | |
751 | switch (*str) | |
752 | { | |
753 | case 'a': | |
754 | attr |= SHF_ALLOC; | |
755 | break; | |
18ae9cc1 L |
756 | case 'e': |
757 | attr |= SHF_EXCLUDE; | |
758 | break; | |
9de8d8f1 RH |
759 | case 'w': |
760 | attr |= SHF_WRITE; | |
761 | break; | |
762 | case 'x': | |
763 | attr |= SHF_EXECINSTR; | |
764 | break; | |
9469ddf0 | 765 | case 'M': |
f5fa8ca2 JJ |
766 | attr |= SHF_MERGE; |
767 | break; | |
9469ddf0 | 768 | case 'S': |
f5fa8ca2 JJ |
769 | attr |= SHF_STRINGS; |
770 | break; | |
060adf0e AM |
771 | case 'G': |
772 | attr |= SHF_GROUP; | |
773 | break; | |
13ae64f3 JJ |
774 | case 'T': |
775 | attr |= SHF_TLS; | |
776 | break; | |
01642c12 RM |
777 | case '?': |
778 | *clone = TRUE; | |
779 | break; | |
34105363 L |
780 | /* Compatibility. */ |
781 | case 'm': | |
782 | if (*(str - 1) == 'a') | |
783 | { | |
784 | attr |= SHF_MERGE; | |
785 | if (len > 1 && str[1] == 's') | |
786 | { | |
787 | attr |= SHF_STRINGS; | |
788 | str++, len--; | |
789 | } | |
790 | break; | |
791 | } | |
9de8d8f1 RH |
792 | default: |
793 | { | |
18ae9cc1 | 794 | char *bad_msg = _("unrecognized .section attribute: want a,e,w,x,M,S,G,T"); |
9de8d8f1 | 795 | #ifdef md_elf_section_letter |
01e1a5bc | 796 | bfd_vma md_attr = md_elf_section_letter (*str, &bad_msg); |
8f3bae45 | 797 | if (md_attr != (bfd_vma) -1) |
9de8d8f1 RH |
798 | attr |= md_attr; |
799 | else | |
800 | #endif | |
711ef82f | 801 | as_fatal ("%s", bad_msg); |
9de8d8f1 RH |
802 | } |
803 | break; | |
804 | } | |
805 | str++, len--; | |
806 | } | |
807 | ||
808 | return attr; | |
809 | } | |
810 | ||
8d28c9d7 | 811 | static int |
44bf2362 | 812 | obj_elf_section_type (char *str, size_t len, bfd_boolean warn) |
9de8d8f1 RH |
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; | |
34f70875 L |
818 | if (len == 4 && strncmp (str, "note", 4) == 0) |
819 | return SHT_NOTE; | |
10b016c2 PB |
820 | if (len == 10 && strncmp (str, "init_array", 10) == 0) |
821 | return SHT_INIT_ARRAY; | |
822 | if (len == 10 && strncmp (str, "fini_array", 10) == 0) | |
823 | return SHT_FINI_ARRAY; | |
824 | if (len == 13 && strncmp (str, "preinit_array", 13) == 0) | |
825 | return SHT_PREINIT_ARRAY; | |
9de8d8f1 RH |
826 | |
827 | #ifdef md_elf_section_type | |
828 | { | |
829 | int md_type = md_elf_section_type (str, len); | |
830 | if (md_type >= 0) | |
831 | return md_type; | |
832 | } | |
833 | #endif | |
834 | ||
44bf2362 NC |
835 | if (warn) |
836 | as_warn (_("unrecognized section type")); | |
837 | return 0; | |
838 | } | |
839 | ||
01e1a5bc | 840 | static bfd_vma |
44bf2362 NC |
841 | obj_elf_section_word (char *str, size_t len, int *type) |
842 | { | |
843 | int ret; | |
844 | ||
845 | if (len == 5 && strncmp (str, "write", 5) == 0) | |
846 | return SHF_WRITE; | |
847 | if (len == 5 && strncmp (str, "alloc", 5) == 0) | |
848 | return SHF_ALLOC; | |
849 | if (len == 9 && strncmp (str, "execinstr", 9) == 0) | |
850 | return SHF_EXECINSTR; | |
18ae9cc1 L |
851 | if (len == 7 && strncmp (str, "exclude", 7) == 0) |
852 | return SHF_EXCLUDE; | |
44bf2362 NC |
853 | if (len == 3 && strncmp (str, "tls", 3) == 0) |
854 | return SHF_TLS; | |
855 | ||
856 | #ifdef md_elf_section_word | |
857 | { | |
01e1a5bc NC |
858 | bfd_vma md_attr = md_elf_section_word (str, len); |
859 | if (md_attr > 0) | |
44bf2362 NC |
860 | return md_attr; |
861 | } | |
862 | #endif | |
863 | ||
864 | ret = obj_elf_section_type (str, len, FALSE); | |
865 | if (ret != 0) | |
866 | *type = ret; | |
867 | else | |
868 | as_warn (_("unrecognized section attribute")); | |
869 | ||
9de8d8f1 RH |
870 | return 0; |
871 | } | |
872 | ||
6ce8b369 | 873 | /* Get name of section. */ |
52b010e4 | 874 | char * |
dbe2df79 | 875 | obj_elf_section_name (void) |
6ce8b369 AM |
876 | { |
877 | char *name; | |
878 | ||
879 | SKIP_WHITESPACE (); | |
880 | if (*input_line_pointer == '"') | |
881 | { | |
882 | int dummy; | |
883 | ||
884 | name = demand_copy_C_string (&dummy); | |
885 | if (name == NULL) | |
886 | { | |
887 | ignore_rest_of_line (); | |
888 | return NULL; | |
889 | } | |
890 | } | |
891 | else | |
892 | { | |
893 | char *end = input_line_pointer; | |
894 | ||
895 | while (0 == strchr ("\n\t,; ", *end)) | |
896 | end++; | |
897 | if (end == input_line_pointer) | |
898 | { | |
c95b35a9 | 899 | as_bad (_("missing name")); |
6ce8b369 AM |
900 | ignore_rest_of_line (); |
901 | return NULL; | |
902 | } | |
903 | ||
1e9cc1c2 | 904 | name = (char *) xmalloc (end - input_line_pointer + 1); |
6ce8b369 AM |
905 | memcpy (name, input_line_pointer, end - input_line_pointer); |
906 | name[end - input_line_pointer] = '\0'; | |
612d7b83 L |
907 | #ifdef tc_canonicalize_section_name |
908 | name = tc_canonicalize_section_name (name); | |
909 | #endif | |
6ce8b369 AM |
910 | input_line_pointer = end; |
911 | } | |
912 | SKIP_WHITESPACE (); | |
913 | return name; | |
914 | } | |
915 | ||
9de8d8f1 | 916 | void |
dbe2df79 | 917 | obj_elf_section (int push) |
9de8d8f1 | 918 | { |
aa1f4858 | 919 | char *name, *group_name, *beg; |
01e1a5bc NC |
920 | int type, dummy; |
921 | bfd_vma attr; | |
f5fa8ca2 | 922 | int entsize; |
d2dab548 | 923 | int linkonce; |
6f932bce | 924 | subsegT new_subsection = -1; |
9de8d8f1 | 925 | |
5b93d8bb | 926 | #ifndef TC_I370 |
252b5132 RH |
927 | if (flag_mri) |
928 | { | |
929 | char mri_type; | |
930 | ||
9de8d8f1 | 931 | #ifdef md_flush_pending_output |
60bcf0fa | 932 | md_flush_pending_output (); |
9de8d8f1 RH |
933 | #endif |
934 | ||
252b5132 RH |
935 | previous_section = now_seg; |
936 | previous_subsection = now_subseg; | |
937 | ||
938 | s_mri_sect (&mri_type); | |
939 | ||
940 | #ifdef md_elf_section_change_hook | |
941 | md_elf_section_change_hook (); | |
942 | #endif | |
943 | ||
944 | return; | |
945 | } | |
5b93d8bb | 946 | #endif /* ! defined (TC_I370) */ |
252b5132 | 947 | |
6ce8b369 AM |
948 | name = obj_elf_section_name (); |
949 | if (name == NULL) | |
950 | return; | |
252b5132 RH |
951 | type = SHT_NULL; |
952 | attr = 0; | |
aa1f4858 | 953 | group_name = NULL; |
f5fa8ca2 | 954 | entsize = 0; |
d2dab548 | 955 | linkonce = 0; |
252b5132 RH |
956 | |
957 | if (*input_line_pointer == ',') | |
958 | { | |
959 | /* Skip the comma. */ | |
960 | ++input_line_pointer; | |
252b5132 RH |
961 | SKIP_WHITESPACE (); |
962 | ||
9cfc3331 | 963 | if (push && ISDIGIT (*input_line_pointer)) |
6f932bce | 964 | { |
9cfc3331 | 965 | /* .pushsection has an optional subsection. */ |
6f932bce | 966 | new_subsection = (subsegT) get_absolute_expression (); |
9cfc3331 L |
967 | |
968 | SKIP_WHITESPACE (); | |
969 | ||
970 | /* Stop if we don't see a comma. */ | |
971 | if (*input_line_pointer != ',') | |
972 | goto done; | |
973 | ||
974 | /* Skip the comma. */ | |
975 | ++input_line_pointer; | |
976 | SKIP_WHITESPACE (); | |
6f932bce | 977 | } |
9cfc3331 L |
978 | |
979 | if (*input_line_pointer == '"') | |
252b5132 | 980 | { |
01642c12 RM |
981 | bfd_boolean clone; |
982 | ||
9de8d8f1 RH |
983 | beg = demand_copy_C_string (&dummy); |
984 | if (beg == NULL) | |
252b5132 | 985 | { |
9de8d8f1 RH |
986 | ignore_rest_of_line (); |
987 | return; | |
252b5132 | 988 | } |
01642c12 | 989 | attr |= obj_elf_parse_section_letters (beg, strlen (beg), &clone); |
252b5132 RH |
990 | |
991 | SKIP_WHITESPACE (); | |
992 | if (*input_line_pointer == ',') | |
993 | { | |
9de8d8f1 | 994 | char c; |
060adf0e AM |
995 | char *save = input_line_pointer; |
996 | ||
252b5132 RH |
997 | ++input_line_pointer; |
998 | SKIP_WHITESPACE (); | |
9de8d8f1 RH |
999 | c = *input_line_pointer; |
1000 | if (c == '"') | |
252b5132 | 1001 | { |
9de8d8f1 RH |
1002 | beg = demand_copy_C_string (&dummy); |
1003 | if (beg == NULL) | |
252b5132 | 1004 | { |
9de8d8f1 RH |
1005 | ignore_rest_of_line (); |
1006 | return; | |
252b5132 | 1007 | } |
44bf2362 | 1008 | type = obj_elf_section_type (beg, strlen (beg), TRUE); |
9de8d8f1 RH |
1009 | } |
1010 | else if (c == '@' || c == '%') | |
1011 | { | |
1012 | beg = ++input_line_pointer; | |
1013 | c = get_symbol_end (); | |
1014 | *input_line_pointer = c; | |
44bf2362 | 1015 | type = obj_elf_section_type (beg, input_line_pointer - beg, TRUE); |
252b5132 | 1016 | } |
060adf0e AM |
1017 | else |
1018 | input_line_pointer = save; | |
252b5132 | 1019 | } |
f5fa8ca2 JJ |
1020 | |
1021 | SKIP_WHITESPACE (); | |
6ce8b369 | 1022 | if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',') |
f5fa8ca2 JJ |
1023 | { |
1024 | ++input_line_pointer; | |
1025 | SKIP_WHITESPACE (); | |
1026 | entsize = get_absolute_expression (); | |
6ce8b369 | 1027 | SKIP_WHITESPACE (); |
f5fa8ca2 JJ |
1028 | if (entsize < 0) |
1029 | { | |
6ce8b369 | 1030 | as_warn (_("invalid merge entity size")); |
f5fa8ca2 JJ |
1031 | attr &= ~SHF_MERGE; |
1032 | entsize = 0; | |
1033 | } | |
1034 | } | |
6ce8b369 AM |
1035 | else if ((attr & SHF_MERGE) != 0) |
1036 | { | |
1037 | as_warn (_("entity size for SHF_MERGE not specified")); | |
1038 | attr &= ~SHF_MERGE; | |
1039 | } | |
060adf0e | 1040 | |
01642c12 RM |
1041 | if ((attr & SHF_GROUP) != 0 && clone) |
1042 | { | |
1043 | as_warn (_("? section flag ignored with G present")); | |
1044 | clone = FALSE; | |
1045 | } | |
060adf0e AM |
1046 | if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',') |
1047 | { | |
1048 | ++input_line_pointer; | |
aa1f4858 AM |
1049 | group_name = obj_elf_section_name (); |
1050 | if (group_name == NULL) | |
060adf0e | 1051 | attr &= ~SHF_GROUP; |
d2dab548 AM |
1052 | else if (strncmp (input_line_pointer, ",comdat", 7) == 0) |
1053 | { | |
1054 | input_line_pointer += 7; | |
1055 | linkonce = 1; | |
1056 | } | |
1057 | else if (strncmp (name, ".gnu.linkonce", 13) == 0) | |
1058 | linkonce = 1; | |
060adf0e AM |
1059 | } |
1060 | else if ((attr & SHF_GROUP) != 0) | |
1061 | { | |
1062 | as_warn (_("group name for SHF_GROUP not specified")); | |
1063 | attr &= ~SHF_GROUP; | |
1064 | } | |
01642c12 RM |
1065 | |
1066 | if (clone) | |
1067 | { | |
1068 | const char *now_group = elf_group_name (now_seg); | |
1069 | if (now_group != NULL) | |
1070 | { | |
1071 | group_name = xstrdup (now_group); | |
1072 | linkonce = (now_seg->flags & SEC_LINK_ONCE) != 0; | |
1073 | } | |
1074 | } | |
252b5132 RH |
1075 | } |
1076 | else | |
1077 | { | |
1078 | do | |
1079 | { | |
9de8d8f1 RH |
1080 | char c; |
1081 | ||
252b5132 RH |
1082 | SKIP_WHITESPACE (); |
1083 | if (*input_line_pointer != '#') | |
1084 | { | |
c95b35a9 | 1085 | as_bad (_("character following name is not '#'")); |
252b5132 RH |
1086 | ignore_rest_of_line (); |
1087 | return; | |
1088 | } | |
9de8d8f1 RH |
1089 | beg = ++input_line_pointer; |
1090 | c = get_symbol_end (); | |
1091 | *input_line_pointer = c; | |
1092 | ||
44bf2362 | 1093 | attr |= obj_elf_section_word (beg, input_line_pointer - beg, & type); |
9de8d8f1 | 1094 | |
252b5132 RH |
1095 | SKIP_WHITESPACE (); |
1096 | } | |
1097 | while (*input_line_pointer++ == ','); | |
1098 | --input_line_pointer; | |
1099 | } | |
1100 | } | |
1101 | ||
9cfc3331 | 1102 | done: |
252b5132 | 1103 | demand_empty_rest_of_line (); |
9de8d8f1 | 1104 | |
d2dab548 | 1105 | obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push); |
6f932bce NC |
1106 | |
1107 | if (push && new_subsection != -1) | |
1108 | subseg_set (now_seg, new_subsection); | |
252b5132 RH |
1109 | } |
1110 | ||
1111 | /* Change to the .data section. */ | |
1112 | ||
16b93d88 | 1113 | void |
dbe2df79 | 1114 | obj_elf_data (int i) |
252b5132 RH |
1115 | { |
1116 | #ifdef md_flush_pending_output | |
1117 | md_flush_pending_output (); | |
1118 | #endif | |
1119 | ||
1120 | previous_section = now_seg; | |
1121 | previous_subsection = now_subseg; | |
1122 | s_data (i); | |
1123 | ||
1124 | #ifdef md_elf_section_change_hook | |
1125 | md_elf_section_change_hook (); | |
1126 | #endif | |
1127 | } | |
1128 | ||
1129 | /* Change to the .text section. */ | |
1130 | ||
16b93d88 | 1131 | void |
dbe2df79 | 1132 | obj_elf_text (int i) |
252b5132 RH |
1133 | { |
1134 | #ifdef md_flush_pending_output | |
1135 | md_flush_pending_output (); | |
1136 | #endif | |
1137 | ||
1138 | previous_section = now_seg; | |
1139 | previous_subsection = now_subseg; | |
1140 | s_text (i); | |
1141 | ||
1142 | #ifdef md_elf_section_change_hook | |
1143 | md_elf_section_change_hook (); | |
1144 | #endif | |
1145 | } | |
1146 | ||
8fe53b44 JB |
1147 | /* Change to the *ABS* section. */ |
1148 | ||
1149 | void | |
1150 | obj_elf_struct (int i) | |
1151 | { | |
1152 | #ifdef md_flush_pending_output | |
1153 | md_flush_pending_output (); | |
1154 | #endif | |
1155 | ||
1156 | previous_section = now_seg; | |
1157 | previous_subsection = now_subseg; | |
1158 | s_struct (i); | |
1159 | ||
1160 | #ifdef md_elf_section_change_hook | |
1161 | md_elf_section_change_hook (); | |
1162 | #endif | |
1163 | } | |
1164 | ||
252b5132 | 1165 | static void |
dbe2df79 | 1166 | obj_elf_subsection (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1167 | { |
6f932bce | 1168 | int temp; |
252b5132 RH |
1169 | |
1170 | #ifdef md_flush_pending_output | |
1171 | md_flush_pending_output (); | |
1172 | #endif | |
1173 | ||
1174 | previous_section = now_seg; | |
1175 | previous_subsection = now_subseg; | |
1176 | ||
1177 | temp = get_absolute_expression (); | |
1178 | subseg_set (now_seg, (subsegT) temp); | |
1179 | demand_empty_rest_of_line (); | |
1180 | ||
1181 | #ifdef md_elf_section_change_hook | |
1182 | md_elf_section_change_hook (); | |
1183 | #endif | |
1184 | } | |
1185 | ||
1186 | /* This can be called from the processor backends if they change | |
1187 | sections. */ | |
1188 | ||
1189 | void | |
dbe2df79 | 1190 | obj_elf_section_change_hook (void) |
252b5132 RH |
1191 | { |
1192 | previous_section = now_seg; | |
1193 | previous_subsection = now_subseg; | |
1194 | } | |
1195 | ||
1196 | void | |
dbe2df79 | 1197 | obj_elf_previous (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1198 | { |
9de8d8f1 RH |
1199 | segT new_section; |
1200 | int new_subsection; | |
1201 | ||
252b5132 RH |
1202 | if (previous_section == 0) |
1203 | { | |
6ce8b369 | 1204 | as_warn (_(".previous without corresponding .section; ignored")); |
252b5132 RH |
1205 | return; |
1206 | } | |
1207 | ||
1208 | #ifdef md_flush_pending_output | |
1209 | md_flush_pending_output (); | |
1210 | #endif | |
1211 | ||
9de8d8f1 RH |
1212 | new_section = previous_section; |
1213 | new_subsection = previous_subsection; | |
1214 | previous_section = now_seg; | |
1215 | previous_subsection = now_subseg; | |
1216 | subseg_set (new_section, new_subsection); | |
1217 | ||
1218 | #ifdef md_elf_section_change_hook | |
1219 | md_elf_section_change_hook (); | |
1220 | #endif | |
1221 | } | |
1222 | ||
1223 | static void | |
dbe2df79 | 1224 | obj_elf_popsection (int xxx ATTRIBUTE_UNUSED) |
9de8d8f1 RH |
1225 | { |
1226 | struct section_stack *top = section_stack; | |
1227 | ||
1228 | if (top == NULL) | |
1229 | { | |
6ce8b369 | 1230 | as_warn (_(".popsection without corresponding .pushsection; ignored")); |
9de8d8f1 RH |
1231 | return; |
1232 | } | |
1233 | ||
1234 | #ifdef md_flush_pending_output | |
1235 | md_flush_pending_output (); | |
1236 | #endif | |
1237 | ||
1238 | section_stack = top->next; | |
1239 | previous_section = top->prev_seg; | |
1240 | previous_subsection = top->prev_subseg; | |
1241 | subseg_set (top->seg, top->subseg); | |
1242 | free (top); | |
252b5132 RH |
1243 | |
1244 | #ifdef md_elf_section_change_hook | |
1245 | md_elf_section_change_hook (); | |
1246 | #endif | |
1247 | } | |
1248 | ||
1249 | static void | |
dbe2df79 | 1250 | obj_elf_line (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1251 | { |
1252 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
bf514e21 | 1253 | delightful bug, so we are not being incompatible here. */ |
dbe2df79 | 1254 | new_logical_line (NULL, get_absolute_expression ()); |
252b5132 RH |
1255 | demand_empty_rest_of_line (); |
1256 | } | |
1257 | ||
1258 | /* This handles the .symver pseudo-op, which is used to specify a | |
1259 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
1260 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
1261 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
1262 | with the same value as the symbol NAME. */ | |
1263 | ||
1264 | static void | |
dbe2df79 | 1265 | obj_elf_symver (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1266 | { |
1267 | char *name; | |
1268 | char c; | |
468cced8 | 1269 | char old_lexat; |
252b5132 RH |
1270 | symbolS *sym; |
1271 | ||
6e8bd58f | 1272 | sym = get_sym_from_input_line_and_check (); |
252b5132 | 1273 | |
252b5132 RH |
1274 | if (*input_line_pointer != ',') |
1275 | { | |
1276 | as_bad (_("expected comma after name in .symver")); | |
1277 | ignore_rest_of_line (); | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | ++input_line_pointer; | |
eba874d8 | 1282 | SKIP_WHITESPACE (); |
252b5132 | 1283 | name = input_line_pointer; |
468cced8 AM |
1284 | |
1285 | /* Temporarily include '@' in symbol names. */ | |
1286 | old_lexat = lex_type[(unsigned char) '@']; | |
1287 | lex_type[(unsigned char) '@'] |= LEX_NAME; | |
1288 | c = get_symbol_end (); | |
1289 | lex_type[(unsigned char) '@'] = old_lexat; | |
252b5132 | 1290 | |
339681c0 L |
1291 | if (symbol_get_obj (sym)->versioned_name == NULL) |
1292 | { | |
1293 | symbol_get_obj (sym)->versioned_name = xstrdup (name); | |
252b5132 | 1294 | |
339681c0 | 1295 | *input_line_pointer = c; |
252b5132 | 1296 | |
6f620856 L |
1297 | if (strchr (symbol_get_obj (sym)->versioned_name, |
1298 | ELF_VER_CHR) == NULL) | |
339681c0 L |
1299 | { |
1300 | as_bad (_("missing version name in `%s' for symbol `%s'"), | |
1301 | symbol_get_obj (sym)->versioned_name, | |
1302 | S_GET_NAME (sym)); | |
1303 | ignore_rest_of_line (); | |
1304 | return; | |
1305 | } | |
1306 | } | |
1307 | else | |
252b5132 | 1308 | { |
339681c0 L |
1309 | if (strcmp (symbol_get_obj (sym)->versioned_name, name)) |
1310 | { | |
1311 | as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"), | |
1312 | name, symbol_get_obj (sym)->versioned_name, | |
1313 | S_GET_NAME (sym)); | |
1314 | ignore_rest_of_line (); | |
1315 | return; | |
1316 | } | |
1317 | ||
1318 | *input_line_pointer = c; | |
252b5132 RH |
1319 | } |
1320 | ||
1321 | demand_empty_rest_of_line (); | |
1322 | } | |
1323 | ||
1324 | /* This handles the .vtable_inherit pseudo-op, which is used to indicate | |
1325 | to the linker the hierarchy in which a particular table resides. The | |
1326 | syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */ | |
1327 | ||
904a31bf | 1328 | struct fix * |
dbe2df79 | 1329 | obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1330 | { |
1331 | char *cname, *pname; | |
1332 | symbolS *csym, *psym; | |
1333 | char c, bad = 0; | |
1334 | ||
1335 | if (*input_line_pointer == '#') | |
1336 | ++input_line_pointer; | |
1337 | ||
1338 | cname = input_line_pointer; | |
1339 | c = get_symbol_end (); | |
1340 | csym = symbol_find (cname); | |
1341 | ||
1342 | /* GCFIXME: should check that we don't have two .vtable_inherits for | |
1343 | the same child symbol. Also, we can currently only do this if the | |
1344 | child symbol is already exists and is placed in a fragment. */ | |
1345 | ||
49309057 | 1346 | if (csym == NULL || symbol_get_frag (csym) == NULL) |
252b5132 | 1347 | { |
bd3ba5d1 | 1348 | as_bad (_("expected `%s' to have already been set for .vtable_inherit"), |
252b5132 RH |
1349 | cname); |
1350 | bad = 1; | |
1351 | } | |
1352 | ||
1353 | *input_line_pointer = c; | |
1354 | ||
1355 | SKIP_WHITESPACE (); | |
1356 | if (*input_line_pointer != ',') | |
1357 | { | |
bd3ba5d1 | 1358 | as_bad (_("expected comma after name in .vtable_inherit")); |
252b5132 | 1359 | ignore_rest_of_line (); |
904a31bf | 1360 | return NULL; |
252b5132 RH |
1361 | } |
1362 | ||
1363 | ++input_line_pointer; | |
1364 | SKIP_WHITESPACE (); | |
1365 | ||
1366 | if (*input_line_pointer == '#') | |
1367 | ++input_line_pointer; | |
1368 | ||
1369 | if (input_line_pointer[0] == '0' | |
1370 | && (input_line_pointer[1] == '\0' | |
3882b010 | 1371 | || ISSPACE (input_line_pointer[1]))) |
252b5132 RH |
1372 | { |
1373 | psym = section_symbol (absolute_section); | |
1374 | ++input_line_pointer; | |
1375 | } | |
1376 | else | |
1377 | { | |
1378 | pname = input_line_pointer; | |
1379 | c = get_symbol_end (); | |
1380 | psym = symbol_find_or_make (pname); | |
1381 | *input_line_pointer = c; | |
1382 | } | |
1383 | ||
1384 | demand_empty_rest_of_line (); | |
1385 | ||
1386 | if (bad) | |
904a31bf | 1387 | return NULL; |
252b5132 | 1388 | |
9c2799c2 | 1389 | gas_assert (symbol_get_value_expression (csym)->X_op == O_constant); |
904a31bf AM |
1390 | return fix_new (symbol_get_frag (csym), |
1391 | symbol_get_value_expression (csym)->X_add_number, | |
1392 | 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT); | |
252b5132 | 1393 | } |
fa306131 | 1394 | |
252b5132 RH |
1395 | /* This handles the .vtable_entry pseudo-op, which is used to indicate |
1396 | to the linker that a vtable slot was used. The syntax is | |
1397 | ".vtable_entry tablename, offset". */ | |
1398 | ||
904a31bf | 1399 | struct fix * |
dbe2df79 | 1400 | obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1401 | { |
252b5132 RH |
1402 | symbolS *sym; |
1403 | offsetT offset; | |
252b5132 RH |
1404 | |
1405 | if (*input_line_pointer == '#') | |
1406 | ++input_line_pointer; | |
1407 | ||
6e8bd58f | 1408 | sym = get_sym_from_input_line_and_check (); |
252b5132 RH |
1409 | if (*input_line_pointer != ',') |
1410 | { | |
bd3ba5d1 | 1411 | as_bad (_("expected comma after name in .vtable_entry")); |
252b5132 | 1412 | ignore_rest_of_line (); |
904a31bf | 1413 | return NULL; |
252b5132 RH |
1414 | } |
1415 | ||
1416 | ++input_line_pointer; | |
1417 | if (*input_line_pointer == '#') | |
1418 | ++input_line_pointer; | |
1419 | ||
1420 | offset = get_absolute_expression (); | |
1421 | ||
252b5132 | 1422 | demand_empty_rest_of_line (); |
904a31bf AM |
1423 | |
1424 | return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0, | |
1425 | BFD_RELOC_VTABLE_ENTRY); | |
252b5132 RH |
1426 | } |
1427 | ||
1428 | void | |
dbe2df79 | 1429 | elf_obj_read_begin_hook (void) |
252b5132 RH |
1430 | { |
1431 | #ifdef NEED_ECOFF_DEBUG | |
1432 | if (ECOFF_DEBUGGING) | |
1433 | ecoff_read_begin_hook (); | |
1434 | #endif | |
1435 | } | |
1436 | ||
1437 | void | |
dbe2df79 | 1438 | elf_obj_symbol_new_hook (symbolS *symbolP) |
252b5132 | 1439 | { |
49309057 ILT |
1440 | struct elf_obj_sy *sy_obj; |
1441 | ||
1442 | sy_obj = symbol_get_obj (symbolP); | |
1443 | sy_obj->size = NULL; | |
1444 | sy_obj->versioned_name = NULL; | |
252b5132 RH |
1445 | |
1446 | #ifdef NEED_ECOFF_DEBUG | |
1447 | if (ECOFF_DEBUGGING) | |
1448 | ecoff_symbol_new_hook (symbolP); | |
1449 | #endif | |
1450 | } | |
1451 | ||
8fd3e36b AM |
1452 | /* When setting one symbol equal to another, by default we probably |
1453 | want them to have the same "size", whatever it means in the current | |
1454 | context. */ | |
1455 | ||
1456 | void | |
dbe2df79 | 1457 | elf_copy_symbol_attributes (symbolS *dest, symbolS *src) |
8fd3e36b | 1458 | { |
060adf0e AM |
1459 | struct elf_obj_sy *srcelf = symbol_get_obj (src); |
1460 | struct elf_obj_sy *destelf = symbol_get_obj (dest); | |
1461 | if (srcelf->size) | |
1462 | { | |
1463 | if (destelf->size == NULL) | |
1e9cc1c2 | 1464 | destelf->size = (expressionS *) xmalloc (sizeof (expressionS)); |
060adf0e AM |
1465 | *destelf->size = *srcelf->size; |
1466 | } | |
1467 | else | |
1468 | { | |
1469 | if (destelf->size != NULL) | |
1470 | free (destelf->size); | |
1471 | destelf->size = NULL; | |
1472 | } | |
1473 | S_SET_SIZE (dest, S_GET_SIZE (src)); | |
26eb4093 JJ |
1474 | /* Don't copy visibility. */ |
1475 | S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest)) | |
1476 | | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1)))); | |
8fd3e36b AM |
1477 | } |
1478 | ||
252b5132 | 1479 | void |
dbe2df79 | 1480 | obj_elf_version (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1481 | { |
1482 | char *name; | |
1483 | unsigned int c; | |
252b5132 RH |
1484 | char *p; |
1485 | asection *seg = now_seg; | |
1486 | subsegT subseg = now_subseg; | |
1487 | Elf_Internal_Note i_note; | |
1488 | Elf_External_Note e_note; | |
dbe2df79 | 1489 | asection *note_secp = NULL; |
252b5132 RH |
1490 | |
1491 | SKIP_WHITESPACE (); | |
1492 | if (*input_line_pointer == '\"') | |
1493 | { | |
6afdfa61 NC |
1494 | unsigned int len; |
1495 | ||
bf514e21 | 1496 | ++input_line_pointer; /* -> 1st char of string. */ |
252b5132 RH |
1497 | name = input_line_pointer; |
1498 | ||
1499 | while (is_a_char (c = next_char_of_string ())) | |
1500 | ; | |
1501 | c = *input_line_pointer; | |
1502 | *input_line_pointer = '\0'; | |
1503 | *(input_line_pointer - 1) = '\0'; | |
1504 | *input_line_pointer = c; | |
1505 | ||
6afdfa61 | 1506 | /* Create the .note section. */ |
252b5132 RH |
1507 | note_secp = subseg_new (".note", 0); |
1508 | bfd_set_section_flags (stdoutput, | |
1509 | note_secp, | |
1510 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1511 | ||
6afdfa61 NC |
1512 | /* Process the version string. */ |
1513 | len = strlen (name) + 1; | |
252b5132 | 1514 | |
6afdfa61 NC |
1515 | /* PR 3456: Although the name field is padded out to an 4-byte |
1516 | boundary, the namesz field should not be adjusted. */ | |
1517 | i_note.namesz = len; | |
1518 | i_note.descsz = 0; /* No description. */ | |
252b5132 RH |
1519 | i_note.type = NT_VERSION; |
1520 | p = frag_more (sizeof (e_note.namesz)); | |
dbe2df79 | 1521 | md_number_to_chars (p, i_note.namesz, sizeof (e_note.namesz)); |
252b5132 | 1522 | p = frag_more (sizeof (e_note.descsz)); |
dbe2df79 | 1523 | md_number_to_chars (p, i_note.descsz, sizeof (e_note.descsz)); |
252b5132 | 1524 | p = frag_more (sizeof (e_note.type)); |
dbe2df79 | 1525 | md_number_to_chars (p, i_note.type, sizeof (e_note.type)); |
6afdfa61 | 1526 | p = frag_more (len); |
5ab504f9 | 1527 | memcpy (p, name, len); |
252b5132 | 1528 | |
252b5132 RH |
1529 | frag_align (2, 0, 0); |
1530 | ||
1531 | subseg_set (seg, subseg); | |
1532 | } | |
1533 | else | |
6afdfa61 NC |
1534 | as_bad (_("expected quoted string")); |
1535 | ||
252b5132 RH |
1536 | demand_empty_rest_of_line (); |
1537 | } | |
1538 | ||
1539 | static void | |
dbe2df79 | 1540 | obj_elf_size (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1541 | { |
1542 | char *name = input_line_pointer; | |
1543 | char c = get_symbol_end (); | |
1544 | char *p; | |
1545 | expressionS exp; | |
1546 | symbolS *sym; | |
1547 | ||
1548 | p = input_line_pointer; | |
1549 | *p = c; | |
1550 | SKIP_WHITESPACE (); | |
1551 | if (*input_line_pointer != ',') | |
1552 | { | |
1553 | *p = 0; | |
1554 | as_bad (_("expected comma after name `%s' in .size directive"), name); | |
1555 | *p = c; | |
1556 | ignore_rest_of_line (); | |
1557 | return; | |
1558 | } | |
1559 | input_line_pointer++; | |
1560 | expression (&exp); | |
1561 | if (exp.X_op == O_absent) | |
1562 | { | |
1563 | as_bad (_("missing expression in .size directive")); | |
1564 | exp.X_op = O_constant; | |
1565 | exp.X_add_number = 0; | |
1566 | } | |
1567 | *p = 0; | |
1568 | sym = symbol_find_or_make (name); | |
1569 | *p = c; | |
1570 | if (exp.X_op == O_constant) | |
c538998c JJ |
1571 | { |
1572 | S_SET_SIZE (sym, exp.X_add_number); | |
1573 | if (symbol_get_obj (sym)->size) | |
1574 | { | |
1575 | xfree (symbol_get_obj (sym)->size); | |
1576 | symbol_get_obj (sym)->size = NULL; | |
1577 | } | |
1578 | } | |
252b5132 RH |
1579 | else |
1580 | { | |
1e9cc1c2 NC |
1581 | symbol_get_obj (sym)->size = |
1582 | (expressionS *) xmalloc (sizeof (expressionS)); | |
49309057 | 1583 | *symbol_get_obj (sym)->size = exp; |
252b5132 RH |
1584 | } |
1585 | demand_empty_rest_of_line (); | |
1586 | } | |
1587 | ||
1588 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. | |
44bf2362 | 1589 | There are six syntaxes: |
fa306131 | 1590 | |
252b5132 RH |
1591 | The first (used on Solaris) is |
1592 | .type SYM,#function | |
1593 | The second (used on UnixWare) is | |
1594 | .type SYM,@function | |
1595 | The third (reportedly to be used on Irix 6.0) is | |
1596 | .type SYM STT_FUNC | |
1597 | The fourth (used on NetBSD/Arm and Linux/ARM) is | |
1598 | .type SYM,%function | |
aa8c34c3 JE |
1599 | The fifth (used on SVR4/860) is |
1600 | .type SYM,"function" | |
44bf2362 NC |
1601 | The sixth (emitted by recent SunPRO under Solaris) is |
1602 | .type SYM,[0-9] | |
1603 | where the integer is the STT_* value. | |
252b5132 RH |
1604 | */ |
1605 | ||
44bf2362 NC |
1606 | static char * |
1607 | obj_elf_type_name (char *cp) | |
1608 | { | |
1609 | char *p; | |
1610 | ||
1611 | p = input_line_pointer; | |
1612 | if (*input_line_pointer >= '0' | |
1613 | && *input_line_pointer <= '9') | |
1614 | { | |
1615 | while (*input_line_pointer >= '0' | |
1616 | && *input_line_pointer <= '9') | |
1617 | ++input_line_pointer; | |
1618 | *cp = *input_line_pointer; | |
1619 | *input_line_pointer = '\0'; | |
1620 | } | |
1621 | else | |
1622 | *cp = get_symbol_end (); | |
1623 | ||
1624 | return p; | |
1625 | } | |
1626 | ||
252b5132 | 1627 | static void |
dbe2df79 | 1628 | obj_elf_type (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1629 | { |
252b5132 RH |
1630 | char c; |
1631 | int type; | |
1e9cc1c2 | 1632 | const char *type_name; |
252b5132 | 1633 | symbolS *sym; |
904a31bf | 1634 | elf_symbol_type *elfsym; |
252b5132 | 1635 | |
6e8bd58f NS |
1636 | sym = get_sym_from_input_line_and_check (); |
1637 | c = *input_line_pointer; | |
904a31bf | 1638 | elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym); |
252b5132 | 1639 | |
252b5132 RH |
1640 | if (*input_line_pointer == ',') |
1641 | ++input_line_pointer; | |
1642 | ||
1643 | SKIP_WHITESPACE (); | |
1644 | if ( *input_line_pointer == '#' | |
1645 | || *input_line_pointer == '@' | |
aa8c34c3 | 1646 | || *input_line_pointer == '"' |
252b5132 RH |
1647 | || *input_line_pointer == '%') |
1648 | ++input_line_pointer; | |
1649 | ||
1e9cc1c2 | 1650 | type_name = obj_elf_type_name (& c); |
252b5132 RH |
1651 | |
1652 | type = 0; | |
1e9cc1c2 NC |
1653 | if (strcmp (type_name, "function") == 0 |
1654 | || strcmp (type_name, "2") == 0 | |
1655 | || strcmp (type_name, "STT_FUNC") == 0) | |
252b5132 | 1656 | type = BSF_FUNCTION; |
1e9cc1c2 NC |
1657 | else if (strcmp (type_name, "object") == 0 |
1658 | || strcmp (type_name, "1") == 0 | |
1659 | || strcmp (type_name, "STT_OBJECT") == 0) | |
252b5132 | 1660 | type = BSF_OBJECT; |
1e9cc1c2 NC |
1661 | else if (strcmp (type_name, "tls_object") == 0 |
1662 | || strcmp (type_name, "6") == 0 | |
1663 | || strcmp (type_name, "STT_TLS") == 0) | |
b9734f35 | 1664 | type = BSF_OBJECT | BSF_THREAD_LOCAL; |
1e9cc1c2 NC |
1665 | else if (strcmp (type_name, "notype") == 0 |
1666 | || strcmp (type_name, "0") == 0 | |
1667 | || strcmp (type_name, "STT_NOTYPE") == 0) | |
e7b9a8c1 | 1668 | ; |
1e9cc1c2 NC |
1669 | else if (strcmp (type_name, "common") == 0 |
1670 | || strcmp (type_name, "5") == 0 | |
1671 | || strcmp (type_name, "STT_COMMON") == 0) | |
504b7d20 NC |
1672 | { |
1673 | type = BSF_OBJECT; | |
1674 | ||
1675 | if (! S_IS_COMMON (sym)) | |
1676 | { | |
1677 | if (S_IS_VOLATILE (sym)) | |
1678 | { | |
1679 | sym = symbol_clone (sym, 1); | |
1680 | S_SET_SEGMENT (sym, bfd_com_section_ptr); | |
1681 | S_SET_VALUE (sym, 0); | |
1682 | S_SET_EXTERNAL (sym); | |
1683 | symbol_set_frag (sym, &zero_address_frag); | |
1684 | S_CLEAR_VOLATILE (sym); | |
1685 | } | |
1686 | else if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) | |
1687 | as_bad (_("symbol '%s' is already defined"), S_GET_NAME (sym)); | |
1688 | else | |
1689 | { | |
1690 | /* FIXME: Is it safe to just change the section ? */ | |
1691 | S_SET_SEGMENT (sym, bfd_com_section_ptr); | |
1692 | S_SET_VALUE (sym, 0); | |
1693 | S_SET_EXTERNAL (sym); | |
1694 | } | |
1695 | } | |
1696 | } | |
1e9cc1c2 NC |
1697 | else if (strcmp (type_name, "gnu_indirect_function") == 0 |
1698 | || strcmp (type_name, "10") == 0 | |
1699 | || strcmp (type_name, "STT_GNU_IFUNC") == 0) | |
d8045f23 NC |
1700 | { |
1701 | const struct elf_backend_data *bed; | |
1702 | ||
1703 | bed = get_elf_backend_data (stdoutput); | |
9c55345c TS |
1704 | if (!(bed->elf_osabi == ELFOSABI_GNU |
1705 | /* GNU is still using the default value 0. */ | |
d8045f23 NC |
1706 | || bed->elf_osabi == ELFOSABI_NONE)) |
1707 | as_bad (_("symbol type \"%s\" is supported only by GNU targets"), | |
1e9cc1c2 | 1708 | type_name); |
d8045f23 NC |
1709 | type = BSF_FUNCTION | BSF_GNU_INDIRECT_FUNCTION; |
1710 | } | |
1e9cc1c2 | 1711 | else if (strcmp (type_name, "gnu_unique_object") == 0) |
3e7a7d11 | 1712 | { |
d3ce72d0 | 1713 | struct elf_backend_data *bed; |
3e7a7d11 | 1714 | |
d3ce72d0 | 1715 | bed = (struct elf_backend_data *) get_elf_backend_data (stdoutput); |
9c55345c TS |
1716 | if (!(bed->elf_osabi == ELFOSABI_GNU |
1717 | /* GNU is still using the default value 0. */ | |
3e7a7d11 NC |
1718 | || bed->elf_osabi == ELFOSABI_NONE)) |
1719 | as_bad (_("symbol type \"%s\" is supported only by GNU targets"), | |
1e9cc1c2 | 1720 | type_name); |
3e7a7d11 | 1721 | type = BSF_OBJECT | BSF_GNU_UNIQUE; |
9c55345c TS |
1722 | /* PR 10549: Always set OSABI field to GNU for objects containing unique symbols. */ |
1723 | bed->elf_osabi = ELFOSABI_GNU; | |
3e7a7d11 | 1724 | } |
904a31bf | 1725 | #ifdef md_elf_symbol_type |
1e9cc1c2 | 1726 | else if ((type = md_elf_symbol_type (type_name, sym, elfsym)) != -1) |
904a31bf AM |
1727 | ; |
1728 | #endif | |
252b5132 | 1729 | else |
1e9cc1c2 | 1730 | as_bad (_("unrecognized symbol type \"%s\""), type_name); |
252b5132 RH |
1731 | |
1732 | *input_line_pointer = c; | |
1733 | ||
aa8c34c3 JE |
1734 | if (*input_line_pointer == '"') |
1735 | ++input_line_pointer; | |
1736 | ||
904a31bf | 1737 | elfsym->symbol.flags |= type; |
252b5132 RH |
1738 | |
1739 | demand_empty_rest_of_line (); | |
1740 | } | |
1741 | ||
1742 | static void | |
dbe2df79 | 1743 | obj_elf_ident (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
1744 | { |
1745 | static segT comment_section; | |
1746 | segT old_section = now_seg; | |
1747 | int old_subsection = now_subseg; | |
1748 | ||
5f91fe03 ILT |
1749 | #ifdef md_flush_pending_output |
1750 | md_flush_pending_output (); | |
1751 | #endif | |
1752 | ||
252b5132 RH |
1753 | if (!comment_section) |
1754 | { | |
1755 | char *p; | |
1756 | comment_section = subseg_new (".comment", 0); | |
1757 | bfd_set_section_flags (stdoutput, comment_section, | |
01fb1836 RM |
1758 | SEC_READONLY | SEC_HAS_CONTENTS |
1759 | | SEC_MERGE | SEC_STRINGS); | |
1760 | comment_section->entsize = 1; | |
cd000bff DJ |
1761 | #ifdef md_elf_section_change_hook |
1762 | md_elf_section_change_hook (); | |
1763 | #endif | |
252b5132 RH |
1764 | p = frag_more (1); |
1765 | *p = 0; | |
1766 | } | |
1767 | else | |
1768 | subseg_set (comment_section, 0); | |
38a57ae7 | 1769 | stringer (8 + 1); |
252b5132 RH |
1770 | subseg_set (old_section, old_subsection); |
1771 | } | |
1772 | ||
1773 | #ifdef INIT_STAB_SECTION | |
1774 | ||
1775 | /* The first entry in a .stabs section is special. */ | |
1776 | ||
1777 | void | |
dbe2df79 | 1778 | obj_elf_init_stab_section (segT seg) |
252b5132 RH |
1779 | { |
1780 | char *file; | |
1781 | char *p; | |
1782 | char *stabstr_name; | |
1783 | unsigned int stroff; | |
1784 | ||
1785 | /* Force the section to align to a longword boundary. Without this, | |
1786 | UnixWare ar crashes. */ | |
1787 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1788 | ||
bf514e21 | 1789 | /* Make space for this first symbol. */ |
252b5132 | 1790 | p = frag_more (12); |
bf514e21 | 1791 | /* Zero it out. */ |
252b5132 | 1792 | memset (p, 0, 12); |
dbe2df79 | 1793 | as_where (&file, NULL); |
1e9cc1c2 | 1794 | stabstr_name = (char *) xmalloc (strlen (segment_name (seg)) + 4); |
252b5132 RH |
1795 | strcpy (stabstr_name, segment_name (seg)); |
1796 | strcat (stabstr_name, "str"); | |
1797 | stroff = get_stab_string_offset (file, stabstr_name); | |
91952a06 | 1798 | know (stroff == 1 || (stroff == 0 && file[0] == '\0')); |
252b5132 RH |
1799 | md_number_to_chars (p, stroff, 4); |
1800 | seg_info (seg)->stabu.p = p; | |
1801 | } | |
1802 | ||
1803 | #endif | |
1804 | ||
1805 | /* Fill in the counts in the first entry in a .stabs section. */ | |
1806 | ||
1807 | static void | |
dbe2df79 | 1808 | adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1809 | { |
1810 | char *name; | |
1811 | asection *strsec; | |
1812 | char *p; | |
1813 | int strsz, nsyms; | |
1814 | ||
1815 | if (strncmp (".stab", sec->name, 5)) | |
1816 | return; | |
1817 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1818 | return; | |
1819 | ||
1e9cc1c2 | 1820 | name = (char *) alloca (strlen (sec->name) + 4); |
252b5132 RH |
1821 | strcpy (name, sec->name); |
1822 | strcat (name, "str"); | |
1823 | strsec = bfd_get_section_by_name (abfd, name); | |
1824 | if (strsec) | |
1825 | strsz = bfd_section_size (abfd, strsec); | |
1826 | else | |
1827 | strsz = 0; | |
1828 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1829 | ||
1830 | p = seg_info (sec)->stabu.p; | |
9c2799c2 | 1831 | gas_assert (p != 0); |
252b5132 | 1832 | |
dbe2df79 AM |
1833 | bfd_h_put_16 (abfd, nsyms, p + 6); |
1834 | bfd_h_put_32 (abfd, strsz, p + 8); | |
252b5132 RH |
1835 | } |
1836 | ||
1837 | #ifdef NEED_ECOFF_DEBUG | |
1838 | ||
1839 | /* This function is called by the ECOFF code. It is supposed to | |
1840 | record the external symbol information so that the backend can | |
1841 | write it out correctly. The ELF backend doesn't actually handle | |
1842 | this at the moment, so we do it ourselves. We save the information | |
1843 | in the symbol. */ | |
1844 | ||
ae4a729b AM |
1845 | #ifdef OBJ_MAYBE_ELF |
1846 | static | |
1847 | #endif | |
252b5132 | 1848 | void |
dbe2df79 | 1849 | elf_ecoff_set_ext (symbolS *sym, struct ecoff_extr *ext) |
252b5132 | 1850 | { |
dbe2df79 | 1851 | symbol_get_bfdsym (sym)->udata.p = ext; |
252b5132 RH |
1852 | } |
1853 | ||
1854 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1855 | supposed to *EXT to the external symbol information, and return | |
1856 | whether the symbol should be used at all. */ | |
1857 | ||
b34976b6 | 1858 | static bfd_boolean |
dbe2df79 | 1859 | elf_get_extr (asymbol *sym, EXTR *ext) |
252b5132 RH |
1860 | { |
1861 | if (sym->udata.p == NULL) | |
b34976b6 | 1862 | return FALSE; |
252b5132 | 1863 | *ext = *(EXTR *) sym->udata.p; |
b34976b6 | 1864 | return TRUE; |
252b5132 RH |
1865 | } |
1866 | ||
1867 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1868 | nothing to do for ELF. */ | |
1869 | ||
252b5132 | 1870 | static void |
dbe2df79 AM |
1871 | elf_set_index (asymbol *sym ATTRIBUTE_UNUSED, |
1872 | bfd_size_type indx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1873 | { |
1874 | } | |
1875 | ||
1876 | #endif /* NEED_ECOFF_DEBUG */ | |
1877 | ||
1878 | void | |
dbe2df79 | 1879 | elf_frob_symbol (symbolS *symp, int *puntp) |
252b5132 | 1880 | { |
49309057 | 1881 | struct elf_obj_sy *sy_obj; |
49002d7f | 1882 | expressionS *size; |
49309057 | 1883 | |
252b5132 RH |
1884 | #ifdef NEED_ECOFF_DEBUG |
1885 | if (ECOFF_DEBUGGING) | |
1886 | ecoff_frob_symbol (symp); | |
1887 | #endif | |
1888 | ||
49309057 ILT |
1889 | sy_obj = symbol_get_obj (symp); |
1890 | ||
49002d7f L |
1891 | size = sy_obj->size; |
1892 | if (size != NULL) | |
252b5132 | 1893 | { |
49002d7f L |
1894 | if (resolve_expression (size) |
1895 | && size->X_op == O_constant) | |
1896 | S_SET_SIZE (symp, size->X_add_number); | |
e1e90034 | 1897 | else |
49002d7f | 1898 | { |
21be61f5 | 1899 | if (flag_size_check == size_check_error) |
869fe6ea AM |
1900 | as_bad (_(".size expression for %s " |
1901 | "does not evaluate to a constant"), S_GET_NAME (symp)); | |
21be61f5 | 1902 | else |
869fe6ea AM |
1903 | as_warn (_(".size expression for %s " |
1904 | "does not evaluate to a constant"), S_GET_NAME (symp)); | |
49002d7f | 1905 | } |
49309057 ILT |
1906 | free (sy_obj->size); |
1907 | sy_obj->size = NULL; | |
252b5132 RH |
1908 | } |
1909 | ||
49309057 | 1910 | if (sy_obj->versioned_name != NULL) |
252b5132 | 1911 | { |
79082ff0 L |
1912 | char *p; |
1913 | ||
1914 | p = strchr (sy_obj->versioned_name, ELF_VER_CHR); | |
1915 | know (p != NULL); | |
1916 | ||
252b5132 RH |
1917 | /* This symbol was given a new name with the .symver directive. |
1918 | ||
13c56984 AM |
1919 | If this is an external reference, just rename the symbol to |
1920 | include the version string. This will make the relocs be | |
1921 | against the correct versioned symbol. | |
252b5132 RH |
1922 | |
1923 | If this is a definition, add an alias. FIXME: Using an alias | |
1924 | will permit the debugging information to refer to the right | |
1925 | symbol. However, it's not clear whether it is the best | |
1926 | approach. */ | |
1927 | ||
1928 | if (! S_IS_DEFINED (symp)) | |
1929 | { | |
252b5132 | 1930 | /* Verify that the name isn't using the @@ syntax--this is |
13c56984 AM |
1931 | reserved for definitions of the default version to link |
1932 | against. */ | |
252b5132 RH |
1933 | if (p[1] == ELF_VER_CHR) |
1934 | { | |
1935 | as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"), | |
49309057 | 1936 | sy_obj->versioned_name); |
b34976b6 | 1937 | *puntp = TRUE; |
252b5132 | 1938 | } |
49309057 | 1939 | S_SET_NAME (symp, sy_obj->versioned_name); |
252b5132 RH |
1940 | } |
1941 | else | |
1942 | { | |
dbe2df79 | 1943 | if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR) |
79082ff0 L |
1944 | { |
1945 | size_t l; | |
1946 | ||
1947 | /* The @@@ syntax is a special case. It renames the | |
1948 | symbol name to versioned_name with one `@' removed. */ | |
1949 | l = strlen (&p[3]) + 1; | |
dbe2df79 | 1950 | memmove (&p[2], &p[3], l); |
79082ff0 L |
1951 | S_SET_NAME (symp, sy_obj->versioned_name); |
1952 | } | |
1953 | else | |
1954 | { | |
1955 | symbolS *symp2; | |
252b5132 | 1956 | |
79082ff0 L |
1957 | /* FIXME: Creating a new symbol here is risky. We're |
1958 | in the final loop over the symbol table. We can | |
1959 | get away with it only because the symbol goes to | |
1960 | the end of the list, where the loop will still see | |
1961 | it. It would probably be better to do this in | |
1962 | obj_frob_file_before_adjust. */ | |
252b5132 | 1963 | |
79082ff0 | 1964 | symp2 = symbol_find_or_make (sy_obj->versioned_name); |
252b5132 | 1965 | |
79082ff0 | 1966 | /* Now we act as though we saw symp2 = sym. */ |
252b5132 | 1967 | |
79082ff0 | 1968 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); |
252b5132 | 1969 | |
79082ff0 L |
1970 | /* Subtracting out the frag address here is a hack |
1971 | because we are in the middle of the final loop. */ | |
1972 | S_SET_VALUE (symp2, | |
1973 | (S_GET_VALUE (symp) | |
1974 | - symbol_get_frag (symp)->fr_address)); | |
252b5132 | 1975 | |
79082ff0 | 1976 | symbol_set_frag (symp2, symbol_get_frag (symp)); |
252b5132 | 1977 | |
79082ff0 L |
1978 | /* This will copy over the size information. */ |
1979 | copy_symbol_attributes (symp2, symp); | |
252b5132 | 1980 | |
26eb4093 JJ |
1981 | S_SET_OTHER (symp2, S_GET_OTHER (symp)); |
1982 | ||
79082ff0 L |
1983 | if (S_IS_WEAK (symp)) |
1984 | S_SET_WEAK (symp2); | |
252b5132 | 1985 | |
79082ff0 L |
1986 | if (S_IS_EXTERNAL (symp)) |
1987 | S_SET_EXTERNAL (symp2); | |
1988 | } | |
252b5132 RH |
1989 | } |
1990 | } | |
1991 | ||
1992 | /* Double check weak symbols. */ | |
49309057 | 1993 | if (S_IS_WEAK (symp)) |
252b5132 RH |
1994 | { |
1995 | if (S_IS_COMMON (symp)) | |
6ce8b369 | 1996 | as_bad (_("symbol `%s' can not be both weak and common"), |
252b5132 RH |
1997 | S_GET_NAME (symp)); |
1998 | } | |
1999 | ||
2000 | #ifdef TC_MIPS | |
2001 | /* The Irix 5 and 6 assemblers set the type of any common symbol and | |
2002 | any undefined non-function symbol to STT_OBJECT. We try to be | |
2003 | compatible, since newer Irix 5 and 6 linkers care. However, we | |
2004 | only set undefined symbols to be STT_OBJECT if we are on Irix, | |
2005 | because that is the only time gcc will generate the necessary | |
2006 | .global directives to mark functions. */ | |
2007 | ||
2008 | if (S_IS_COMMON (symp)) | |
49309057 | 2009 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; |
252b5132 RH |
2010 | |
2011 | if (strstr (TARGET_OS, "irix") != NULL | |
49309057 ILT |
2012 | && ! S_IS_DEFINED (symp) |
2013 | && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0) | |
2014 | symbol_get_bfdsym (symp)->flags |= BSF_OBJECT; | |
252b5132 | 2015 | #endif |
252b5132 RH |
2016 | } |
2017 | ||
060adf0e AM |
2018 | struct group_list |
2019 | { | |
2020 | asection **head; /* Section lists. */ | |
2021 | unsigned int *elt_count; /* Number of sections in each list. */ | |
2022 | unsigned int num_group; /* Number of lists. */ | |
1e9cc1c2 | 2023 | struct hash_control *indexes; /* Maps group name to index in head array. */ |
060adf0e AM |
2024 | }; |
2025 | ||
2026 | /* Called via bfd_map_over_sections. If SEC is a member of a group, | |
2027 | add it to a list of sections belonging to the group. INF is a | |
2028 | pointer to a struct group_list, which is where we store the head of | |
2029 | each list. */ | |
2030 | ||
2031 | static void | |
dbe2df79 | 2032 | build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) |
060adf0e | 2033 | { |
1e9cc1c2 | 2034 | struct group_list *list = (struct group_list *) inf; |
aa1f4858 | 2035 | const char *group_name = elf_group_name (sec); |
060adf0e | 2036 | unsigned int i; |
1e9cc1c2 NC |
2037 | unsigned int *elem_idx; |
2038 | unsigned int *idx_ptr; | |
060adf0e AM |
2039 | |
2040 | if (group_name == NULL) | |
2041 | return; | |
2042 | ||
2043 | /* If this group already has a list, add the section to the head of | |
2044 | the list. */ | |
1e9cc1c2 NC |
2045 | elem_idx = (unsigned int *) hash_find (list->indexes, group_name); |
2046 | if (elem_idx != NULL) | |
060adf0e | 2047 | { |
1e9cc1c2 NC |
2048 | elf_next_in_group (sec) = list->head[*elem_idx]; |
2049 | list->head[*elem_idx] = sec; | |
2050 | list->elt_count[*elem_idx] += 1; | |
2051 | return; | |
060adf0e AM |
2052 | } |
2053 | ||
2054 | /* New group. Make the arrays bigger in chunks to minimize calls to | |
2055 | realloc. */ | |
2056 | i = list->num_group; | |
2057 | if ((i & 127) == 0) | |
2058 | { | |
2059 | unsigned int newsize = i + 128; | |
1e9cc1c2 NC |
2060 | list->head = (asection **) xrealloc (list->head, |
2061 | newsize * sizeof (*list->head)); | |
2062 | list->elt_count = (unsigned int *) | |
2063 | xrealloc (list->elt_count, newsize * sizeof (*list->elt_count)); | |
060adf0e AM |
2064 | } |
2065 | list->head[i] = sec; | |
2066 | list->elt_count[i] = 1; | |
2067 | list->num_group += 1; | |
1e9cc1c2 NC |
2068 | |
2069 | /* Add index to hash. */ | |
21d799b5 | 2070 | idx_ptr = (unsigned int *) xmalloc (sizeof (unsigned int)); |
1e9cc1c2 NC |
2071 | *idx_ptr = i; |
2072 | hash_insert (list->indexes, group_name, idx_ptr); | |
2073 | } | |
2074 | ||
2075 | static void free_section_idx (const char *key ATTRIBUTE_UNUSED, void *val) | |
2076 | { | |
2077 | free ((unsigned int *) val); | |
060adf0e AM |
2078 | } |
2079 | ||
252b5132 | 2080 | void |
709001e9 | 2081 | elf_adjust_symtab (void) |
252b5132 | 2082 | { |
060adf0e AM |
2083 | struct group_list list; |
2084 | unsigned int i; | |
2085 | ||
060adf0e AM |
2086 | /* Go find section groups. */ |
2087 | list.num_group = 0; | |
2088 | list.head = NULL; | |
2089 | list.elt_count = NULL; | |
709001e9 | 2090 | list.indexes = hash_new (); |
dbe2df79 | 2091 | bfd_map_over_sections (stdoutput, build_group_lists, &list); |
709001e9 | 2092 | |
060adf0e AM |
2093 | /* Make the SHT_GROUP sections that describe each section group. We |
2094 | can't set up the section contents here yet, because elf section | |
2095 | indices have yet to be calculated. elf.c:set_group_contents does | |
2096 | the rest of the work. */ | |
709001e9 | 2097 | for (i = 0; i < list.num_group; i++) |
060adf0e | 2098 | { |
aa1f4858 | 2099 | const char *group_name = elf_group_name (list.head[i]); |
9758f3fc | 2100 | const char *sec_name; |
060adf0e AM |
2101 | asection *s; |
2102 | flagword flags; | |
9758f3fc | 2103 | struct symbol *sy; |
587aac4e | 2104 | bfd_size_type size; |
060adf0e | 2105 | |
060adf0e | 2106 | flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP; |
d2dab548 | 2107 | for (s = list.head[i]; s != NULL; s = elf_next_in_group (s)) |
68bfbfcc | 2108 | if ((s->flags ^ flags) & SEC_LINK_ONCE) |
d2dab548 AM |
2109 | { |
2110 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
2111 | if (s != list.head[i]) | |
2112 | { | |
2113 | as_warn (_("assuming all members of group `%s' are COMDAT"), | |
2114 | group_name); | |
2115 | break; | |
2116 | } | |
2117 | } | |
2118 | ||
709001e9 | 2119 | sec_name = ".group"; |
9758f3fc | 2120 | s = subseg_force_new (sec_name, 0); |
060adf0e AM |
2121 | if (s == NULL |
2122 | || !bfd_set_section_flags (stdoutput, s, flags) | |
2123 | || !bfd_set_section_alignment (stdoutput, s, 2)) | |
2124 | { | |
2125 | as_fatal (_("can't create group: %s"), | |
2126 | bfd_errmsg (bfd_get_error ())); | |
2127 | } | |
2f89ff8d | 2128 | elf_section_type (s) = SHT_GROUP; |
060adf0e | 2129 | |
aa1f4858 AM |
2130 | /* Pass a pointer to the first section in this group. */ |
2131 | elf_next_in_group (s) = list.head[i]; | |
709001e9 MM |
2132 | /* Make sure that the signature symbol for the group has the |
2133 | name of the group. */ | |
2134 | sy = symbol_find_exact (group_name); | |
2135 | if (!sy | |
2136 | || (sy != symbol_lastP | |
2137 | && (sy->sy_next == NULL | |
2138 | || sy->sy_next->sy_previous != sy))) | |
2139 | { | |
2140 | /* Create the symbol now. */ | |
2141 | sy = symbol_new (group_name, now_seg, (valueT) 0, frag_now); | |
69b70cfe RO |
2142 | #ifdef TE_SOLARIS |
2143 | /* Before Solaris 11 build 154, Sun ld rejects local group | |
2144 | signature symbols, so make them weak hidden instead. */ | |
2145 | symbol_get_bfdsym (sy)->flags |= BSF_WEAK; | |
2146 | S_SET_OTHER (sy, STV_HIDDEN); | |
2147 | #else | |
709001e9 | 2148 | symbol_get_obj (sy)->local = 1; |
69b70cfe | 2149 | #endif |
709001e9 MM |
2150 | symbol_table_insert (sy); |
2151 | } | |
2152 | elf_group_id (s) = symbol_get_bfdsym (sy); | |
060adf0e | 2153 | |
587aac4e AM |
2154 | size = 4 * (list.elt_count[i] + 1); |
2155 | bfd_set_section_size (stdoutput, s, size); | |
b7712f8d | 2156 | s->contents = (unsigned char *) frag_more (size); |
060adf0e | 2157 | frag_now->fr_fix = frag_now_fix_octets (); |
07cb2078 | 2158 | frag_wane (frag_now); |
060adf0e AM |
2159 | } |
2160 | ||
1e9cc1c2 NC |
2161 | /* Cleanup hash. */ |
2162 | hash_traverse (list.indexes, free_section_idx); | |
2163 | hash_die (list.indexes); | |
252b5132 RH |
2164 | } |
2165 | ||
709001e9 MM |
2166 | void |
2167 | elf_frob_file (void) | |
2168 | { | |
2169 | bfd_map_over_sections (stdoutput, adjust_stab_sections, NULL); | |
2170 | ||
2171 | #ifdef elf_tc_final_processing | |
2172 | elf_tc_final_processing (); | |
2173 | #endif | |
2174 | } | |
2175 | ||
4a1805b1 | 2176 | /* It removes any unneeded versioned symbols from the symbol table. */ |
339681c0 L |
2177 | |
2178 | void | |
dbe2df79 | 2179 | elf_frob_file_before_adjust (void) |
339681c0 L |
2180 | { |
2181 | if (symbol_rootP) | |
2182 | { | |
2183 | symbolS *symp; | |
2184 | ||
2185 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
00e6e13d | 2186 | if (!S_IS_DEFINED (symp)) |
79082ff0 | 2187 | { |
00e6e13d | 2188 | if (symbol_get_obj (symp)->versioned_name) |
79082ff0 L |
2189 | { |
2190 | char *p; | |
2191 | ||
2192 | /* The @@@ syntax is a special case. If the symbol is | |
2193 | not defined, 2 `@'s will be removed from the | |
2194 | versioned_name. */ | |
2195 | ||
2196 | p = strchr (symbol_get_obj (symp)->versioned_name, | |
2197 | ELF_VER_CHR); | |
2198 | know (p != NULL); | |
dbe2df79 | 2199 | if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR) |
79082ff0 L |
2200 | { |
2201 | size_t l = strlen (&p[3]) + 1; | |
dbe2df79 | 2202 | memmove (&p[1], &p[3], l); |
79082ff0 L |
2203 | } |
2204 | if (symbol_used_p (symp) == 0 | |
2205 | && symbol_used_in_reloc_p (symp) == 0) | |
2206 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2207 | } | |
00e6e13d JJ |
2208 | |
2209 | /* If there was .weak foo, but foo was neither defined nor | |
2210 | used anywhere, remove it. */ | |
2211 | ||
2212 | else if (S_IS_WEAK (symp) | |
2213 | && symbol_used_p (symp) == 0 | |
2214 | && symbol_used_in_reloc_p (symp) == 0) | |
2215 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
79082ff0 | 2216 | } |
339681c0 L |
2217 | } |
2218 | } | |
2219 | ||
252b5132 RH |
2220 | /* It is required that we let write_relocs have the opportunity to |
2221 | optimize away fixups before output has begun, since it is possible | |
2222 | to eliminate all fixups for a section and thus we never should | |
2223 | have generated the relocation section. */ | |
2224 | ||
2225 | void | |
dbe2df79 | 2226 | elf_frob_file_after_relocs (void) |
252b5132 RH |
2227 | { |
2228 | #ifdef NEED_ECOFF_DEBUG | |
2229 | if (ECOFF_DEBUGGING) | |
2230 | /* Generate the ECOFF debugging information. */ | |
2231 | { | |
2232 | const struct ecoff_debug_swap *debug_swap; | |
2233 | struct ecoff_debug_info debug; | |
2234 | char *buf; | |
2235 | asection *sec; | |
2236 | ||
2237 | debug_swap | |
2238 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
dbe2df79 | 2239 | know (debug_swap != NULL); |
252b5132 RH |
2240 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); |
2241 | ||
2242 | /* Set up the pointers in debug. */ | |
2243 | #define SET(ptr, offset, type) \ | |
2244 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
2245 | ||
2246 | SET (line, cbLineOffset, unsigned char *); | |
dbe2df79 AM |
2247 | SET (external_dnr, cbDnOffset, void *); |
2248 | SET (external_pdr, cbPdOffset, void *); | |
2249 | SET (external_sym, cbSymOffset, void *); | |
2250 | SET (external_opt, cbOptOffset, void *); | |
252b5132 RH |
2251 | SET (external_aux, cbAuxOffset, union aux_ext *); |
2252 | SET (ss, cbSsOffset, char *); | |
dbe2df79 AM |
2253 | SET (external_fdr, cbFdOffset, void *); |
2254 | SET (external_rfd, cbRfdOffset, void *); | |
252b5132 RH |
2255 | /* ssext and external_ext are set up just below. */ |
2256 | ||
2257 | #undef SET | |
2258 | ||
2259 | /* Set up the external symbols. */ | |
2260 | debug.ssext = debug.ssext_end = NULL; | |
2261 | debug.external_ext = debug.external_ext_end = NULL; | |
b34976b6 | 2262 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE, |
252b5132 | 2263 | elf_get_extr, elf_set_index)) |
6ce8b369 | 2264 | as_fatal (_("failed to set up debugging information: %s"), |
252b5132 RH |
2265 | bfd_errmsg (bfd_get_error ())); |
2266 | ||
2267 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
9c2799c2 | 2268 | gas_assert (sec != NULL); |
252b5132 | 2269 | |
b34976b6 | 2270 | know (!stdoutput->output_has_begun); |
252b5132 RH |
2271 | |
2272 | /* We set the size of the section, call bfd_set_section_contents | |
2273 | to force the ELF backend to allocate a file position, and then | |
2274 | write out the data. FIXME: Is this really the best way to do | |
2275 | this? */ | |
587aac4e AM |
2276 | bfd_set_section_size |
2277 | (stdoutput, sec, bfd_ecoff_debug_size (stdoutput, &debug, debug_swap)); | |
252b5132 | 2278 | |
5f91fe03 | 2279 | /* Pass BUF to bfd_set_section_contents because this will |
13c56984 AM |
2280 | eventually become a call to fwrite, and ISO C prohibits |
2281 | passing a NULL pointer to a stdio function even if the | |
2282 | pointer will not be used. */ | |
dbe2df79 | 2283 | if (! bfd_set_section_contents (stdoutput, sec, buf, 0, 0)) |
6ce8b369 | 2284 | as_fatal (_("can't start writing .mdebug section: %s"), |
252b5132 RH |
2285 | bfd_errmsg (bfd_get_error ())); |
2286 | ||
b34976b6 | 2287 | know (stdoutput->output_has_begun); |
252b5132 RH |
2288 | know (sec->filepos != 0); |
2289 | ||
2290 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
2291 | sec->filepos)) | |
6ce8b369 | 2292 | as_fatal (_("could not write .mdebug section: %s"), |
252b5132 RH |
2293 | bfd_errmsg (bfd_get_error ())); |
2294 | } | |
2295 | #endif /* NEED_ECOFF_DEBUG */ | |
2296 | } | |
2297 | ||
2298 | #ifdef SCO_ELF | |
2299 | ||
aaa2624b | 2300 | /* Heavily plagiarized from obj_elf_version. The idea is to emit the |
252b5132 RH |
2301 | SCO specific identifier in the .notes section to satisfy the SCO |
2302 | linker. | |
2303 | ||
2304 | This looks more complicated than it really is. As opposed to the | |
2305 | "obvious" solution, this should handle the cross dev cases | |
2306 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
2307 | generating SCO Elf code) Efficiency isn't a concern, as there | |
2308 | should be exactly one of these sections per object module. | |
2309 | ||
2310 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
2311 | .note section. | |
2312 | ||
fa306131 AM |
2313 | int_32 namesz = 4 ; Name size |
2314 | int_32 descsz = 12 ; Descriptive information | |
2315 | int_32 type = 1 ; | |
2316 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
252b5132 RH |
2317 | int_32 version = (major ver # << 16) | version of tools ; |
2318 | int_32 source = (tool_id << 16 ) | 1 ; | |
2319 | int_32 info = 0 ; These are set by the SCO tools, but we | |
13c56984 | 2320 | don't know enough about the source |
252b5132 RH |
2321 | environment to set them. SCO ld currently |
2322 | ignores them, and recommends we set them | |
2323 | to zero. */ | |
2324 | ||
2325 | #define SCO_MAJOR_VERSION 0x1 | |
2326 | #define SCO_MINOR_VERSION 0x1 | |
2327 | ||
2328 | void | |
dbe2df79 | 2329 | sco_id (void) |
252b5132 RH |
2330 | { |
2331 | ||
2332 | char *name; | |
2333 | unsigned int c; | |
2334 | char ch; | |
2335 | char *p; | |
2336 | asection *seg = now_seg; | |
2337 | subsegT subseg = now_subseg; | |
2338 | Elf_Internal_Note i_note; | |
2339 | Elf_External_Note e_note; | |
dbe2df79 | 2340 | asection *note_secp = NULL; |
252b5132 RH |
2341 | int i, len; |
2342 | ||
2343 | /* create the .note section */ | |
2344 | ||
2345 | note_secp = subseg_new (".note", 0); | |
2346 | bfd_set_section_flags (stdoutput, | |
2347 | note_secp, | |
2348 | SEC_HAS_CONTENTS | SEC_READONLY); | |
2349 | ||
2350 | /* process the version string */ | |
2351 | ||
fa306131 | 2352 | i_note.namesz = 4; |
252b5132 RH |
2353 | i_note.descsz = 12; /* 12 descriptive bytes */ |
2354 | i_note.type = NT_VERSION; /* Contains a version string */ | |
2355 | ||
2356 | p = frag_more (sizeof (i_note.namesz)); | |
dbe2df79 | 2357 | md_number_to_chars (p, i_note.namesz, 4); |
252b5132 RH |
2358 | |
2359 | p = frag_more (sizeof (i_note.descsz)); | |
dbe2df79 | 2360 | md_number_to_chars (p, i_note.descsz, 4); |
252b5132 RH |
2361 | |
2362 | p = frag_more (sizeof (i_note.type)); | |
dbe2df79 | 2363 | md_number_to_chars (p, i_note.type, 4); |
252b5132 RH |
2364 | |
2365 | p = frag_more (4); | |
fa306131 | 2366 | strcpy (p, "SCO"); |
252b5132 RH |
2367 | |
2368 | /* Note: this is the version number of the ELF we're representing */ | |
2369 | p = frag_more (4); | |
2370 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
2371 | ||
2372 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
2373 | it with SCO. The bottom bit shows that we are compat with the | |
2374 | SCO ABI. */ | |
2375 | p = frag_more (4); | |
2376 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
2377 | ||
2378 | /* If we knew (or cared) what the source language options were, we'd | |
2379 | fill them in here. SCO has given us permission to ignore these | |
2380 | and just set them to zero. */ | |
2381 | p = frag_more (4); | |
2382 | md_number_to_chars (p, 0x0000, 4); | |
fa306131 | 2383 | |
252b5132 RH |
2384 | frag_align (2, 0, 0); |
2385 | ||
2386 | /* We probably can't restore the current segment, for there likely | |
2387 | isn't one yet... */ | |
2388 | if (seg && subseg) | |
2389 | subseg_set (seg, subseg); | |
2390 | ||
2391 | } | |
2392 | ||
2393 | #endif /* SCO_ELF */ | |
2394 | ||
bc6b4acc RO |
2395 | static void |
2396 | elf_generate_asm_lineno (void) | |
2397 | { | |
2398 | #ifdef NEED_ECOFF_DEBUG | |
2399 | if (ECOFF_DEBUGGING) | |
2400 | ecoff_generate_asm_lineno (); | |
2401 | #endif | |
2402 | } | |
2403 | ||
2404 | static void | |
bd937d21 L |
2405 | elf_process_stab (segT sec ATTRIBUTE_UNUSED, |
2406 | int what ATTRIBUTE_UNUSED, | |
2407 | const char *string ATTRIBUTE_UNUSED, | |
2408 | int type ATTRIBUTE_UNUSED, | |
2409 | int other ATTRIBUTE_UNUSED, | |
2410 | int desc ATTRIBUTE_UNUSED) | |
bc6b4acc RO |
2411 | { |
2412 | #ifdef NEED_ECOFF_DEBUG | |
2413 | if (ECOFF_DEBUGGING) | |
2414 | ecoff_stab (sec, what, string, type, other, desc); | |
2415 | #endif | |
2416 | } | |
2417 | ||
5110c57e | 2418 | static int |
dbe2df79 | 2419 | elf_separate_stab_sections (void) |
5110c57e HPN |
2420 | { |
2421 | #ifdef NEED_ECOFF_DEBUG | |
2422 | return (!ECOFF_DEBUGGING); | |
2423 | #else | |
2424 | return 1; | |
2425 | #endif | |
2426 | } | |
2427 | ||
2428 | static void | |
dbe2df79 | 2429 | elf_init_stab_section (segT seg) |
5110c57e HPN |
2430 | { |
2431 | #ifdef NEED_ECOFF_DEBUG | |
2432 | if (!ECOFF_DEBUGGING) | |
2433 | #endif | |
2434 | obj_elf_init_stab_section (seg); | |
2435 | } | |
2436 | ||
252b5132 RH |
2437 | const struct format_ops elf_format_ops = |
2438 | { | |
2439 | bfd_target_elf_flavour, | |
4c63da97 AM |
2440 | 0, /* dfl_leading_underscore */ |
2441 | 1, /* emit_section_symbols */ | |
5110c57e HPN |
2442 | elf_begin, |
2443 | elf_file_symbol, | |
252b5132 RH |
2444 | elf_frob_symbol, |
2445 | elf_frob_file, | |
339681c0 | 2446 | elf_frob_file_before_adjust, |
a161fe53 | 2447 | 0, /* obj_frob_file_before_fix */ |
252b5132 RH |
2448 | elf_frob_file_after_relocs, |
2449 | elf_s_get_size, elf_s_set_size, | |
2450 | elf_s_get_align, elf_s_set_align, | |
4c63da97 | 2451 | elf_s_get_other, |
5110c57e | 2452 | elf_s_set_other, |
4c63da97 | 2453 | 0, /* s_get_desc */ |
5110c57e HPN |
2454 | 0, /* s_set_desc */ |
2455 | 0, /* s_get_type */ | |
2456 | 0, /* s_set_type */ | |
252b5132 | 2457 | elf_copy_symbol_attributes, |
bc6b4acc RO |
2458 | elf_generate_asm_lineno, |
2459 | elf_process_stab, | |
5110c57e HPN |
2460 | elf_separate_stab_sections, |
2461 | elf_init_stab_section, | |
252b5132 RH |
2462 | elf_sec_sym_ok_for_reloc, |
2463 | elf_pop_insert, | |
2464 | #ifdef NEED_ECOFF_DEBUG | |
2465 | elf_ecoff_set_ext, | |
2466 | #else | |
4c63da97 | 2467 | 0, /* ecoff_set_ext */ |
252b5132 | 2468 | #endif |
4c63da97 | 2469 | elf_obj_read_begin_hook, |
4cae74aa | 2470 | elf_obj_symbol_new_hook, |
645ea3ea AM |
2471 | 0, |
2472 | elf_adjust_symtab | |
252b5132 | 2473 | }; |