Commit | Line | Data |
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49864cfa | 1 | /* ELF object file format |
ba8f9c09 | 2 | Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. |
49864cfa KR |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as | |
8 | published by the Free Software Foundation; either version 2, | |
9 | or (at your option) any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
14 | the GNU General Public License for more details. | |
15 | ||
3e78d072 ILT |
16 | You should have received a copy of the GNU General Public License |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
49864cfa | 20 | |
e7757ad0 | 21 | #define OBJ_HEADER "obj-elf.h" |
49864cfa | 22 | #include "as.h" |
6e378515 | 23 | #include "subsegs.h" |
49864cfa KR |
24 | #include "obstack.h" |
25 | ||
e7757ad0 KR |
26 | #ifndef ECOFF_DEBUGGING |
27 | #define ECOFF_DEBUGGING 0 | |
f99d287b MM |
28 | #else |
29 | #define NEED_ECOFF_DEBUG | |
e7757ad0 KR |
30 | #endif |
31 | ||
f99d287b | 32 | #ifdef NEED_ECOFF_DEBUG |
c5953036 ILT |
33 | #include "ecoff.h" |
34 | #endif | |
35 | ||
e79cb10b DE |
36 | #ifdef TC_MIPS |
37 | #include "elf/mips.h" | |
38 | #endif | |
39 | ||
3e78d072 ILT |
40 | #ifdef TC_PPC |
41 | #include "elf/ppc.h" | |
42 | #endif | |
43 | ||
23ac3ca1 ILT |
44 | static bfd_vma elf_s_get_size PARAMS ((symbolS *)); |
45 | static void elf_s_set_size PARAMS ((symbolS *, bfd_vma)); | |
46 | static bfd_vma elf_s_get_align PARAMS ((symbolS *)); | |
47 | static void elf_s_set_align PARAMS ((symbolS *, bfd_vma)); | |
48 | static void elf_copy_symbol_attributes PARAMS ((symbolS *, symbolS *)); | |
49 | static int elf_sec_sym_ok_for_reloc PARAMS ((asection *)); | |
50 | static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR)); | |
51 | ||
f99d287b | 52 | #ifdef NEED_ECOFF_DEBUG |
c5953036 ILT |
53 | static boolean elf_get_extr PARAMS ((asymbol *, EXTR *)); |
54 | static void elf_set_index PARAMS ((asymbol *, bfd_size_type)); | |
55 | #endif | |
56 | ||
604633ae | 57 | static void obj_elf_line PARAMS ((int)); |
604633ae ILT |
58 | void obj_elf_version PARAMS ((int)); |
59 | static void obj_elf_size PARAMS ((int)); | |
60 | static void obj_elf_type PARAMS ((int)); | |
61 | static void obj_elf_ident PARAMS ((int)); | |
62 | static void obj_elf_weak PARAMS ((int)); | |
63 | static void obj_elf_local PARAMS ((int)); | |
64 | static void obj_elf_common PARAMS ((int)); | |
d88cc85d | 65 | static void obj_elf_symver PARAMS ((int)); |
13998021 ILT |
66 | static void obj_elf_data PARAMS ((int)); |
67 | static void obj_elf_text PARAMS ((int)); | |
49864cfa | 68 | |
e7757ad0 | 69 | static const pseudo_typeS elf_pseudo_table[] = |
6e378515 | 70 | { |
d7852a33 | 71 | {"comm", obj_elf_common, 0}, |
6e378515 | 72 | {"ident", obj_elf_ident, 0}, |
d7852a33 | 73 | {"local", obj_elf_local, 0}, |
7c05f0ec | 74 | {"previous", obj_elf_previous, 0}, |
6e378515 | 75 | {"section", obj_elf_section, 0}, |
f99d287b MM |
76 | {"section.s", obj_elf_section, 0}, |
77 | {"sect", obj_elf_section, 0}, | |
78 | {"sect.s", obj_elf_section, 0}, | |
6e378515 KR |
79 | {"size", obj_elf_size, 0}, |
80 | {"type", obj_elf_type, 0}, | |
81 | {"version", obj_elf_version, 0}, | |
b81b8a7d | 82 | {"weak", obj_elf_weak, 0}, |
6e378515 | 83 | |
d88cc85d | 84 | /* These are used for stabs-in-elf configurations. */ |
6e378515 | 85 | {"line", obj_elf_line, 0}, |
6e378515 | 86 | |
d88cc85d ILT |
87 | /* This is a GNU extension to handle symbol versions. */ |
88 | {"symver", obj_elf_symver, 0}, | |
89 | ||
7c05f0ec KR |
90 | /* These are used for dwarf. */ |
91 | {"2byte", cons, 2}, | |
92 | {"4byte", cons, 4}, | |
b81b8a7d | 93 | {"8byte", cons, 8}, |
7c05f0ec | 94 | |
13998021 ILT |
95 | /* We need to trap the section changing calls to handle .previous. */ |
96 | {"data", obj_elf_data, 0}, | |
97 | {"text", obj_elf_text, 0}, | |
98 | ||
e7757ad0 KR |
99 | /* End sentinel. */ |
100 | {NULL}, | |
101 | }; | |
102 | ||
103 | static const pseudo_typeS ecoff_debug_pseudo_table[] = | |
104 | { | |
f99d287b | 105 | #ifdef NEED_ECOFF_DEBUG |
c5953036 ILT |
106 | /* COFF style debugging information for ECOFF. .ln is not used; .loc |
107 | is used instead. */ | |
108 | { "def", ecoff_directive_def, 0 }, | |
109 | { "dim", ecoff_directive_dim, 0 }, | |
110 | { "endef", ecoff_directive_endef, 0 }, | |
111 | { "file", ecoff_directive_file, 0 }, | |
112 | { "scl", ecoff_directive_scl, 0 }, | |
113 | { "tag", ecoff_directive_tag, 0 }, | |
114 | { "val", ecoff_directive_val, 0 }, | |
115 | ||
116 | /* COFF debugging requires pseudo-ops .size and .type, but ELF | |
117 | already has meanings for those. We use .esize and .etype | |
118 | instead. These are only generated by gcc anyhow. */ | |
119 | { "esize", ecoff_directive_size, 0 }, | |
120 | { "etype", ecoff_directive_type, 0 }, | |
121 | ||
122 | /* ECOFF specific debugging information. */ | |
123 | { "begin", ecoff_directive_begin, 0 }, | |
124 | { "bend", ecoff_directive_bend, 0 }, | |
125 | { "end", ecoff_directive_end, 0 }, | |
126 | { "ent", ecoff_directive_ent, 0 }, | |
127 | { "fmask", ecoff_directive_fmask, 0 }, | |
128 | { "frame", ecoff_directive_frame, 0 }, | |
129 | { "loc", ecoff_directive_loc, 0 }, | |
130 | { "mask", ecoff_directive_mask, 0 }, | |
131 | ||
f99d287b MM |
132 | /* Other ECOFF directives. */ |
133 | { "extern", ecoff_directive_extern, 0 }, | |
134 | ||
c5953036 ILT |
135 | /* These are used on Irix. I don't know how to implement them. */ |
136 | { "alias", s_ignore, 0 }, | |
137 | { "bgnb", s_ignore, 0 }, | |
138 | { "endb", s_ignore, 0 }, | |
139 | { "lab", s_ignore, 0 }, | |
140 | { "noalias", s_ignore, 0 }, | |
141 | { "verstamp", s_ignore, 0 }, | |
142 | { "vreg", s_ignore, 0 }, | |
f99d287b | 143 | #endif |
c5953036 | 144 | |
6e378515 | 145 | {NULL} /* end sentinel */ |
49864cfa KR |
146 | }; |
147 | ||
b81b8a7d | 148 | #undef NO_RELOC |
6e378515 KR |
149 | #include "aout/aout64.h" |
150 | ||
0bd28bc4 ILT |
151 | /* This is called when the assembler starts. */ |
152 | ||
153 | void | |
154 | elf_begin () | |
155 | { | |
156 | /* Add symbols for the known sections to the symbol table. */ | |
157 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
158 | ".text"))); | |
159 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
160 | ".data"))); | |
161 | symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput, | |
162 | ".bss"))); | |
163 | } | |
164 | ||
e7757ad0 KR |
165 | void |
166 | elf_pop_insert () | |
167 | { | |
168 | pop_insert (elf_pseudo_table); | |
169 | if (ECOFF_DEBUGGING) | |
170 | pop_insert (ecoff_debug_pseudo_table); | |
171 | } | |
172 | ||
173 | static bfd_vma | |
174 | elf_s_get_size (sym) | |
175 | symbolS *sym; | |
176 | { | |
177 | return S_GET_SIZE (sym); | |
178 | } | |
179 | ||
180 | static void | |
181 | elf_s_set_size (sym, sz) | |
182 | symbolS *sym; | |
183 | bfd_vma sz; | |
184 | { | |
185 | S_SET_SIZE (sym, sz); | |
186 | } | |
187 | ||
188 | static bfd_vma | |
189 | elf_s_get_align (sym) | |
190 | symbolS *sym; | |
191 | { | |
192 | return S_GET_ALIGN (sym); | |
193 | } | |
194 | ||
195 | static void | |
196 | elf_s_set_align (sym, align) | |
197 | symbolS *sym; | |
198 | bfd_vma align; | |
199 | { | |
200 | S_SET_ALIGN (sym, align); | |
201 | } | |
202 | ||
203 | static void | |
204 | elf_copy_symbol_attributes (dest, src) | |
205 | symbolS *dest, *src; | |
206 | { | |
207 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
208 | } | |
209 | ||
210 | static int | |
211 | elf_sec_sym_ok_for_reloc (sec) | |
212 | asection *sec; | |
213 | { | |
214 | return obj_sec_sym_ok_for_reloc (sec); | |
215 | } | |
216 | ||
6e378515 KR |
217 | void |
218 | elf_file_symbol (s) | |
219 | char *s; | |
220 | { | |
221 | symbolS *sym; | |
222 | ||
223 | sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0); | |
224 | sym->sy_frag = &zero_address_frag; | |
225 | sym->bsym->flags |= BSF_FILE; | |
226 | ||
227 | if (symbol_rootP != sym) | |
228 | { | |
229 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
230 | symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP); | |
231 | #ifdef DEBUG | |
232 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
233 | #endif | |
234 | } | |
ba8f9c09 ILT |
235 | |
236 | #ifdef NEED_ECOFF_DEBUG | |
237 | ecoff_new_file (s); | |
238 | #endif | |
6e378515 KR |
239 | } |
240 | ||
d7852a33 | 241 | static void |
604633ae ILT |
242 | obj_elf_common (ignore) |
243 | int ignore; | |
d7852a33 KR |
244 | { |
245 | char *name; | |
246 | char c; | |
247 | char *p; | |
248 | int temp, size; | |
249 | symbolS *symbolP; | |
fa20b8bf | 250 | int have_align; |
d7852a33 KR |
251 | |
252 | name = input_line_pointer; | |
253 | c = get_symbol_end (); | |
254 | /* just after name is now '\0' */ | |
255 | p = input_line_pointer; | |
256 | *p = c; | |
257 | SKIP_WHITESPACE (); | |
258 | if (*input_line_pointer != ',') | |
259 | { | |
260 | as_bad ("Expected comma after symbol-name"); | |
261 | ignore_rest_of_line (); | |
262 | return; | |
263 | } | |
264 | input_line_pointer++; /* skip ',' */ | |
265 | if ((temp = get_absolute_expression ()) < 0) | |
266 | { | |
267 | as_bad (".COMMon length (%d.) <0! Ignored.", temp); | |
268 | ignore_rest_of_line (); | |
269 | return; | |
270 | } | |
271 | size = temp; | |
272 | *p = 0; | |
273 | symbolP = symbol_find_or_make (name); | |
274 | *p = c; | |
23ac3ca1 | 275 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) |
d7852a33 KR |
276 | { |
277 | as_bad ("Ignoring attempt to re-define symbol"); | |
278 | ignore_rest_of_line (); | |
279 | return; | |
280 | } | |
281 | if (S_GET_VALUE (symbolP) != 0) | |
282 | { | |
283 | if (S_GET_VALUE (symbolP) != size) | |
284 | { | |
285 | as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.", | |
286 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
287 | } | |
288 | } | |
289 | know (symbolP->sy_frag == &zero_address_frag); | |
290 | if (*input_line_pointer != ',') | |
fa20b8bf ILT |
291 | have_align = 0; |
292 | else | |
d7852a33 | 293 | { |
fa20b8bf ILT |
294 | have_align = 1; |
295 | input_line_pointer++; | |
296 | SKIP_WHITESPACE (); | |
d7852a33 | 297 | } |
fa20b8bf | 298 | if (! have_align || *input_line_pointer != '"') |
d7852a33 | 299 | { |
fa20b8bf ILT |
300 | if (! have_align) |
301 | temp = 0; | |
302 | else | |
d7852a33 | 303 | { |
fa20b8bf ILT |
304 | temp = get_absolute_expression (); |
305 | if (temp < 0) | |
306 | { | |
307 | temp = 0; | |
308 | as_warn ("Common alignment negative; 0 assumed"); | |
309 | } | |
d7852a33 KR |
310 | } |
311 | if (symbolP->local) | |
312 | { | |
313 | segT old_sec; | |
314 | int old_subsec; | |
604633ae | 315 | char *pfrag; |
d7852a33 KR |
316 | int align; |
317 | ||
58d4951d | 318 | /* allocate_bss: */ |
d7852a33 KR |
319 | old_sec = now_seg; |
320 | old_subsec = now_subseg; | |
f99d287b MM |
321 | if (temp) |
322 | { | |
323 | /* convert to a power of 2 alignment */ | |
324 | for (align = 0; (temp & 1) == 0; temp >>= 1, ++align); | |
325 | if (temp != 1) | |
326 | { | |
327 | as_bad ("Common alignment not a power of 2"); | |
328 | ignore_rest_of_line (); | |
329 | return; | |
330 | } | |
331 | } | |
332 | else | |
333 | align = 0; | |
d7852a33 KR |
334 | record_alignment (bss_section, align); |
335 | subseg_set (bss_section, 0); | |
336 | if (align) | |
d88cc85d | 337 | frag_align (align, 0, 0); |
d7852a33 KR |
338 | if (S_GET_SEGMENT (symbolP) == bss_section) |
339 | symbolP->sy_frag->fr_symbol = 0; | |
340 | symbolP->sy_frag = frag_now; | |
23ac3ca1 ILT |
341 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, |
342 | (offsetT) size, (char *) 0); | |
604633ae | 343 | *pfrag = 0; |
f99d287b | 344 | S_SET_SIZE (symbolP, size); |
d7852a33 KR |
345 | S_SET_SEGMENT (symbolP, bss_section); |
346 | S_CLEAR_EXTERNAL (symbolP); | |
347 | subseg_set (old_sec, old_subsec); | |
348 | } | |
349 | else | |
350 | { | |
351 | allocate_common: | |
604633ae | 352 | S_SET_VALUE (symbolP, (valueT) size); |
e7757ad0 | 353 | S_SET_ALIGN (symbolP, temp); |
d7852a33 | 354 | S_SET_EXTERNAL (symbolP); |
23ac3ca1 | 355 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); |
d7852a33 KR |
356 | } |
357 | } | |
358 | else | |
359 | { | |
360 | input_line_pointer++; | |
361 | /* @@ Some use the dot, some don't. Can we get some consistency?? */ | |
362 | if (*input_line_pointer == '.') | |
363 | input_line_pointer++; | |
364 | /* @@ Some say data, some say bss. */ | |
365 | if (strncmp (input_line_pointer, "bss\"", 4) | |
366 | && strncmp (input_line_pointer, "data\"", 5)) | |
367 | { | |
368 | while (*--input_line_pointer != '"') | |
369 | ; | |
370 | input_line_pointer--; | |
371 | goto bad_common_segment; | |
372 | } | |
373 | while (*input_line_pointer++ != '"') | |
374 | ; | |
375 | goto allocate_common; | |
376 | } | |
d88cc85d ILT |
377 | |
378 | symbolP->bsym->flags |= BSF_OBJECT; | |
379 | ||
d7852a33 KR |
380 | demand_empty_rest_of_line (); |
381 | return; | |
382 | ||
383 | { | |
384 | bad_common_segment: | |
385 | p = input_line_pointer; | |
386 | while (*p && *p != '\n') | |
387 | p++; | |
388 | c = *p; | |
389 | *p = '\0'; | |
390 | as_bad ("bad .common segment %s", input_line_pointer + 1); | |
391 | *p = c; | |
392 | input_line_pointer = p; | |
393 | ignore_rest_of_line (); | |
394 | return; | |
395 | } | |
396 | } | |
397 | ||
5d0cd0b8 | 398 | static void |
604633ae ILT |
399 | obj_elf_local (ignore) |
400 | int ignore; | |
d7852a33 KR |
401 | { |
402 | char *name; | |
403 | int c; | |
404 | symbolS *symbolP; | |
405 | ||
406 | do | |
407 | { | |
408 | name = input_line_pointer; | |
409 | c = get_symbol_end (); | |
410 | symbolP = symbol_find_or_make (name); | |
411 | *input_line_pointer = c; | |
412 | SKIP_WHITESPACE (); | |
413 | S_CLEAR_EXTERNAL (symbolP); | |
414 | symbolP->local = 1; | |
415 | if (c == ',') | |
416 | { | |
417 | input_line_pointer++; | |
418 | SKIP_WHITESPACE (); | |
419 | if (*input_line_pointer == '\n') | |
420 | c = '\n'; | |
421 | } | |
422 | } | |
423 | while (c == ','); | |
424 | demand_empty_rest_of_line (); | |
425 | } | |
426 | ||
5d0cd0b8 | 427 | static void |
604633ae ILT |
428 | obj_elf_weak (ignore) |
429 | int ignore; | |
b81b8a7d KR |
430 | { |
431 | char *name; | |
432 | int c; | |
433 | symbolS *symbolP; | |
434 | ||
435 | do | |
436 | { | |
437 | name = input_line_pointer; | |
438 | c = get_symbol_end (); | |
439 | symbolP = symbol_find_or_make (name); | |
440 | *input_line_pointer = c; | |
441 | SKIP_WHITESPACE (); | |
442 | S_SET_WEAK (symbolP); | |
443 | symbolP->local = 1; | |
444 | if (c == ',') | |
445 | { | |
446 | input_line_pointer++; | |
447 | SKIP_WHITESPACE (); | |
448 | if (*input_line_pointer == '\n') | |
449 | c = '\n'; | |
450 | } | |
451 | } | |
452 | while (c == ','); | |
453 | demand_empty_rest_of_line (); | |
454 | } | |
455 | ||
7c05f0ec KR |
456 | static segT previous_section; |
457 | static int previous_subsection; | |
458 | ||
fa20b8bf | 459 | /* Handle the .section pseudo-op. This code supports two different |
5d0cd0b8 | 460 | syntaxes. |
fa20b8bf ILT |
461 | |
462 | The first is found on Solaris, and looks like | |
463 | .section ".sec1",#alloc,#execinstr,#write | |
464 | Here the names after '#' are the SHF_* flags to turn on for the | |
465 | section. I'm not sure how it determines the SHT_* type (BFD | |
466 | doesn't really give us control over the type, anyhow). | |
467 | ||
468 | The second format is found on UnixWare, and probably most SVR4 | |
469 | machines, and looks like | |
470 | .section .sec1,"a",@progbits | |
471 | The quoted string may contain any combination of a, w, x, and | |
472 | represents the SHF_* flags to turn on for the section. The string | |
473 | beginning with '@' can be progbits or nobits. There should be | |
474 | other possibilities, but I don't know what they are. In any case, | |
475 | BFD doesn't really let us set the section type. */ | |
476 | ||
e79cb10b DE |
477 | /* Certain named sections have particular defined types, listed on p. |
478 | 4-19 of the ABI. */ | |
479 | struct special_section | |
480 | { | |
481 | const char *name; | |
482 | int type; | |
483 | int attributes; | |
484 | }; | |
485 | ||
486 | static struct special_section special_sections[] = | |
487 | { | |
488 | { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
489 | { ".comment", SHT_PROGBITS, 0 }, | |
490 | { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
491 | { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
492 | { ".debug", SHT_PROGBITS, 0 }, | |
493 | { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
494 | { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
495 | { ".line", SHT_PROGBITS, 0 }, | |
496 | { ".note", SHT_NOTE, 0 }, | |
497 | { ".rodata", SHT_PROGBITS, SHF_ALLOC }, | |
498 | { ".rodata1", SHT_PROGBITS, SHF_ALLOC }, | |
499 | { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
500 | ||
501 | #ifdef ELF_TC_SPECIAL_SECTIONS | |
502 | ELF_TC_SPECIAL_SECTIONS | |
503 | #endif | |
504 | ||
505 | #if 0 | |
506 | /* The following section names are special, but they can not | |
507 | reasonably appear in assembler code. Some of the attributes are | |
508 | processor dependent. */ | |
509 | { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ }, | |
510 | { ".dynstr", SHT_STRTAB, SHF_ALLOC }, | |
511 | { ".dynsym", SHT_DYNSYM, SHF_ALLOC }, | |
512 | { ".got", SHT_PROGBITS, 0 }, | |
513 | { ".hash", SHT_HASH, SHF_ALLOC }, | |
514 | { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ }, | |
515 | { ".plt", SHT_PROGBITS, 0 }, | |
516 | { ".shstrtab",SHT_STRTAB, 0 }, | |
517 | { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ }, | |
518 | { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ }, | |
519 | #endif | |
520 | ||
521 | { NULL, 0, 0 } | |
522 | }; | |
523 | ||
693b21e7 | 524 | void |
49864cfa KR |
525 | obj_elf_section (xxx) |
526 | int xxx; | |
527 | { | |
528 | char *string; | |
13998021 | 529 | int new_sec; |
fa20b8bf | 530 | segT sec; |
e79cb10b DE |
531 | int type, attr; |
532 | int i; | |
fa20b8bf | 533 | flagword flags; |
0bd28bc4 | 534 | symbolS *secsym; |
49864cfa | 535 | |
e7757ad0 KR |
536 | #ifdef md_flush_pending_output |
537 | md_flush_pending_output (); | |
538 | #endif | |
539 | ||
f99d287b MM |
540 | if (flag_mri) |
541 | { | |
30510276 | 542 | char mri_type; |
f99d287b MM |
543 | |
544 | previous_section = now_seg; | |
545 | previous_subsection = now_subseg; | |
546 | ||
30510276 | 547 | s_mri_sect (&mri_type); |
f99d287b MM |
548 | |
549 | #ifdef md_elf_section_change_hook | |
550 | md_elf_section_change_hook (); | |
551 | #endif | |
552 | ||
553 | return; | |
554 | } | |
555 | ||
b81b8a7d | 556 | /* Get name of section. */ |
fa20b8bf | 557 | SKIP_WHITESPACE (); |
7c05f0ec | 558 | if (*input_line_pointer == '"') |
fa20b8bf ILT |
559 | { |
560 | string = demand_copy_C_string (&xxx); | |
561 | if (string == NULL) | |
562 | { | |
563 | ignore_rest_of_line (); | |
564 | return; | |
565 | } | |
566 | } | |
7c05f0ec KR |
567 | else |
568 | { | |
569 | char *p = input_line_pointer; | |
570 | char c; | |
571 | while (0 == strchr ("\n\t,; ", *p)) | |
572 | p++; | |
fa20b8bf ILT |
573 | if (p == input_line_pointer) |
574 | { | |
575 | as_warn ("Missing section name"); | |
576 | ignore_rest_of_line (); | |
577 | return; | |
578 | } | |
7c05f0ec KR |
579 | c = *p; |
580 | *p = 0; | |
604633ae | 581 | string = xmalloc ((unsigned long) (p - input_line_pointer + 1)); |
7c05f0ec KR |
582 | strcpy (string, input_line_pointer); |
583 | *p = c; | |
584 | input_line_pointer = p; | |
585 | } | |
fa20b8bf ILT |
586 | |
587 | /* Switch to the section, creating it if necessary. */ | |
588 | previous_section = now_seg; | |
589 | previous_subsection = now_subseg; | |
590 | ||
591 | new_sec = bfd_get_section_by_name (stdoutput, string) == NULL; | |
592 | sec = subseg_new (string, 0); | |
593 | ||
594 | /* If this section already existed, we don't bother to change the | |
595 | flag values. */ | |
596 | if (! new_sec) | |
597 | { | |
598 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
599 | ++input_line_pointer; | |
600 | ++input_line_pointer; | |
e7757ad0 KR |
601 | |
602 | #ifdef md_elf_section_change_hook | |
603 | md_elf_section_change_hook (); | |
604 | #endif | |
605 | ||
fa20b8bf ILT |
606 | return; |
607 | } | |
b81b8a7d | 608 | |
49864cfa | 609 | SKIP_WHITESPACE (); |
e79cb10b DE |
610 | |
611 | type = SHT_NULL; | |
612 | attr = 0; | |
613 | ||
614 | if (*input_line_pointer == ',') | |
fa20b8bf ILT |
615 | { |
616 | /* Skip the comma. */ | |
617 | ++input_line_pointer; | |
b81b8a7d | 618 | |
fa20b8bf | 619 | SKIP_WHITESPACE (); |
b81b8a7d KR |
620 | if (*input_line_pointer == '"') |
621 | { | |
fa20b8bf | 622 | /* Pick up a string with a combination of a, w, x. */ |
fa20b8bf ILT |
623 | ++input_line_pointer; |
624 | while (*input_line_pointer != '"') | |
625 | { | |
626 | switch (*input_line_pointer) | |
627 | { | |
628 | case 'a': | |
e79cb10b | 629 | attr |= SHF_ALLOC; |
fa20b8bf ILT |
630 | break; |
631 | case 'w': | |
e79cb10b | 632 | attr |= SHF_WRITE; |
fa20b8bf ILT |
633 | break; |
634 | case 'x': | |
e79cb10b | 635 | attr |= SHF_EXECINSTR; |
fa20b8bf ILT |
636 | break; |
637 | default: | |
f99d287b MM |
638 | { |
639 | char *bad_msg = "Bad .section directive: want a,w,x in string"; | |
640 | #ifdef md_elf_section_letter | |
641 | int md_attr = md_elf_section_letter (*input_line_pointer, &bad_msg); | |
642 | if (md_attr) | |
643 | attr |= md_attr; | |
644 | else | |
645 | #endif | |
646 | { | |
647 | as_warn (bad_msg); | |
648 | ignore_rest_of_line (); | |
649 | return; | |
650 | } | |
651 | } | |
fa20b8bf ILT |
652 | } |
653 | ++input_line_pointer; | |
654 | } | |
655 | ||
656 | /* Skip the closing quote. */ | |
657 | ++input_line_pointer; | |
658 | ||
b81b8a7d | 659 | SKIP_WHITESPACE (); |
fa20b8bf ILT |
660 | if (*input_line_pointer == ',') |
661 | { | |
662 | ++input_line_pointer; | |
663 | SKIP_WHITESPACE (); | |
664 | if (*input_line_pointer == '@') | |
665 | { | |
666 | ++input_line_pointer; | |
667 | if (strncmp (input_line_pointer, "progbits", | |
668 | sizeof "progbits" - 1) == 0) | |
669 | { | |
e79cb10b | 670 | type = SHT_PROGBITS; |
fa20b8bf ILT |
671 | input_line_pointer += sizeof "progbits" - 1; |
672 | } | |
673 | else if (strncmp (input_line_pointer, "nobits", | |
674 | sizeof "nobits" - 1) == 0) | |
675 | { | |
e79cb10b | 676 | type = SHT_NOBITS; |
fa20b8bf ILT |
677 | input_line_pointer += sizeof "nobits" - 1; |
678 | } | |
679 | else | |
680 | { | |
f99d287b MM |
681 | #ifdef md_elf_section_type |
682 | int md_type = md_elf_section_type (&input_line_pointer); | |
683 | if (md_type) | |
684 | type = md_type; | |
685 | else | |
686 | #endif | |
687 | { | |
688 | as_warn ("Unrecognized section type"); | |
689 | ignore_rest_of_line (); | |
690 | } | |
fa20b8bf ILT |
691 | } |
692 | } | |
693 | } | |
b81b8a7d | 694 | } |
fa20b8bf | 695 | else |
49864cfa | 696 | { |
fa20b8bf ILT |
697 | do |
698 | { | |
699 | SKIP_WHITESPACE (); | |
700 | if (*input_line_pointer != '#') | |
701 | { | |
702 | as_warn ("Bad .section directive"); | |
703 | ignore_rest_of_line (); | |
704 | return; | |
705 | } | |
706 | ++input_line_pointer; | |
707 | if (strncmp (input_line_pointer, "write", | |
708 | sizeof "write" - 1) == 0) | |
709 | { | |
e79cb10b | 710 | attr |= SHF_WRITE; |
fa20b8bf ILT |
711 | input_line_pointer += sizeof "write" - 1; |
712 | } | |
713 | else if (strncmp (input_line_pointer, "alloc", | |
714 | sizeof "alloc" - 1) == 0) | |
715 | { | |
e79cb10b | 716 | attr |= SHF_ALLOC; |
fa20b8bf ILT |
717 | input_line_pointer += sizeof "alloc" - 1; |
718 | } | |
719 | else if (strncmp (input_line_pointer, "execinstr", | |
720 | sizeof "execinstr" - 1) == 0) | |
721 | { | |
e79cb10b | 722 | attr |= SHF_EXECINSTR; |
fa20b8bf ILT |
723 | input_line_pointer += sizeof "execinstr" - 1; |
724 | } | |
725 | else | |
726 | { | |
f99d287b MM |
727 | #ifdef md_elf_section_word |
728 | int md_attr = md_elf_section_word (&input_line_pointer); | |
729 | if (md_attr) | |
730 | attr |= md_attr; | |
731 | else | |
732 | #endif | |
733 | { | |
734 | as_warn ("Unrecognized section attribute"); | |
735 | ignore_rest_of_line (); | |
736 | return; | |
737 | } | |
fa20b8bf ILT |
738 | } |
739 | SKIP_WHITESPACE (); | |
740 | } | |
741 | while (*input_line_pointer++ == ','); | |
742 | --input_line_pointer; | |
49864cfa | 743 | } |
49864cfa | 744 | } |
49864cfa | 745 | |
e79cb10b DE |
746 | /* See if this is one of the special sections. */ |
747 | for (i = 0; special_sections[i].name != NULL; i++) | |
748 | { | |
749 | if (string[1] == special_sections[i].name[1] | |
750 | && strcmp (string, special_sections[i].name) == 0) | |
751 | { | |
752 | if (type == SHT_NULL) | |
753 | type = special_sections[i].type; | |
754 | else if (type != special_sections[i].type) | |
755 | as_warn ("Setting incorrect section type for %s", string); | |
756 | ||
757 | if ((attr &~ special_sections[i].attributes) != 0) | |
d88cc85d ILT |
758 | { |
759 | /* As a GNU extension, we permit a .note section to be | |
760 | allocatable. If the linker sees an allocateable | |
761 | .note section, it will create a PT_NOTE segment in | |
762 | the output file. */ | |
763 | if (strcmp (string, ".note") != 0 | |
764 | || attr != SHF_ALLOC) | |
765 | as_warn ("Setting incorrect section attributes for %s", | |
766 | string); | |
767 | } | |
e79cb10b DE |
768 | attr |= special_sections[i].attributes; |
769 | ||
770 | break; | |
771 | } | |
772 | } | |
773 | ||
774 | flags = (SEC_RELOC | |
775 | | ((attr & SHF_WRITE) ? 0 : SEC_READONLY) | |
0bd28bc4 ILT |
776 | | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0) |
777 | | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0) | |
e79cb10b | 778 | | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)); |
0bd28bc4 | 779 | if (special_sections[i].name == NULL) |
e79cb10b | 780 | { |
0bd28bc4 ILT |
781 | if (type == SHT_PROGBITS) |
782 | flags |= SEC_ALLOC | SEC_LOAD; | |
783 | else if (type == SHT_NOBITS) | |
784 | { | |
785 | flags |= SEC_ALLOC; | |
786 | flags &=~ SEC_LOAD; | |
787 | } | |
f99d287b MM |
788 | |
789 | #ifdef md_elf_section_flags | |
0bd28bc4 | 790 | flags = md_elf_section_flags (flags, attr, type); |
f99d287b | 791 | #endif |
0bd28bc4 | 792 | } |
e79cb10b | 793 | |
fa20b8bf | 794 | bfd_set_section_flags (stdoutput, sec, flags); |
13998021 | 795 | |
0bd28bc4 ILT |
796 | /* Add a symbol for this section to the symbol table. */ |
797 | secsym = symbol_find (string); | |
798 | if (secsym != NULL) | |
799 | secsym->bsym = sec->symbol; | |
800 | else | |
801 | symbol_table_insert (section_symbol (sec)); | |
802 | ||
e7757ad0 KR |
803 | #ifdef md_elf_section_change_hook |
804 | md_elf_section_change_hook (); | |
805 | #endif | |
806 | ||
fa20b8bf | 807 | demand_empty_rest_of_line (); |
13998021 ILT |
808 | } |
809 | ||
810 | /* Change to the .data section. */ | |
811 | ||
812 | static void | |
813 | obj_elf_data (i) | |
814 | int i; | |
815 | { | |
2e9974a4 ILT |
816 | #ifdef md_flush_pending_output |
817 | md_flush_pending_output (); | |
818 | #endif | |
819 | ||
13998021 ILT |
820 | previous_section = now_seg; |
821 | previous_subsection = now_subseg; | |
822 | s_data (i); | |
2e9974a4 ILT |
823 | |
824 | #ifdef md_elf_section_change_hook | |
825 | md_elf_section_change_hook (); | |
826 | #endif | |
13998021 ILT |
827 | } |
828 | ||
829 | /* Change to the .text section. */ | |
830 | ||
831 | static void | |
832 | obj_elf_text (i) | |
833 | int i; | |
834 | { | |
2e9974a4 ILT |
835 | #ifdef md_flush_pending_output |
836 | md_flush_pending_output (); | |
837 | #endif | |
838 | ||
13998021 ILT |
839 | previous_section = now_seg; |
840 | previous_subsection = now_subseg; | |
841 | s_text (i); | |
2e9974a4 ILT |
842 | |
843 | #ifdef md_elf_section_change_hook | |
844 | md_elf_section_change_hook (); | |
845 | #endif | |
49864cfa KR |
846 | } |
847 | ||
aff65ed9 ILT |
848 | /* This can be called from the processor backends if they change |
849 | sections. */ | |
850 | ||
851 | void | |
852 | obj_elf_section_change_hook () | |
853 | { | |
854 | previous_section = now_seg; | |
855 | previous_subsection = now_subseg; | |
856 | } | |
857 | ||
693b21e7 | 858 | void |
604633ae ILT |
859 | obj_elf_previous (ignore) |
860 | int ignore; | |
7c05f0ec KR |
861 | { |
862 | if (previous_section == 0) | |
863 | { | |
864 | as_bad (".previous without corresponding .section; ignored"); | |
865 | return; | |
866 | } | |
2e9974a4 ILT |
867 | |
868 | #ifdef md_flush_pending_output | |
869 | md_flush_pending_output (); | |
870 | #endif | |
871 | ||
7c05f0ec KR |
872 | subseg_set (previous_section, previous_subsection); |
873 | previous_section = 0; | |
2e9974a4 ILT |
874 | |
875 | #ifdef md_elf_section_change_hook | |
876 | md_elf_section_change_hook (); | |
877 | #endif | |
7c05f0ec KR |
878 | } |
879 | ||
6e378515 | 880 | static void |
604633ae ILT |
881 | obj_elf_line (ignore) |
882 | int ignore; | |
6e378515 KR |
883 | { |
884 | /* Assume delimiter is part of expression. BSD4.2 as fails with | |
885 | delightful bug, so we are not being incompatible here. */ | |
886 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); | |
887 | demand_empty_rest_of_line (); | |
888 | } | |
49864cfa | 889 | |
d88cc85d ILT |
890 | /* This handle the .symver pseudo-op, which is used to specify a |
891 | symbol version. The syntax is ``.symver NAME,SYMVERNAME''. | |
892 | SYMVERNAME may contain ELF_VER_CHR ('@') characters. This | |
893 | pseudo-op causes the assembler to emit a symbol named SYMVERNAME | |
894 | with the same value as the symbol NAME. */ | |
895 | ||
896 | static void | |
897 | obj_elf_symver (ignore) | |
898 | int ignore; | |
899 | { | |
900 | char *name; | |
901 | char c; | |
902 | symbolS *sym; | |
903 | ||
904 | name = input_line_pointer; | |
905 | c = get_symbol_end (); | |
906 | ||
907 | sym = symbol_find_or_make (name); | |
908 | ||
909 | *input_line_pointer = c; | |
2e9974a4 ILT |
910 | |
911 | if (sym->sy_obj.versioned_name != NULL) | |
912 | { | |
913 | as_bad ("multiple .symver directives for symbol `%s'", | |
914 | S_GET_NAME (sym)); | |
915 | ignore_rest_of_line (); | |
916 | return; | |
917 | } | |
918 | ||
d88cc85d ILT |
919 | SKIP_WHITESPACE (); |
920 | if (*input_line_pointer != ',') | |
921 | { | |
922 | as_bad ("expected comma after name in .symver"); | |
923 | ignore_rest_of_line (); | |
924 | return; | |
925 | } | |
926 | ||
927 | ++input_line_pointer; | |
928 | name = input_line_pointer; | |
929 | while (1) | |
930 | { | |
931 | c = get_symbol_end (); | |
932 | if (c != ELF_VER_CHR) | |
933 | break; | |
934 | *input_line_pointer++ = c; | |
935 | } | |
936 | ||
937 | sym->sy_obj.versioned_name = xstrdup (name); | |
938 | ||
939 | *input_line_pointer = c; | |
940 | ||
2e9974a4 ILT |
941 | if (strchr (sym->sy_obj.versioned_name, ELF_VER_CHR) == NULL) |
942 | { | |
943 | as_bad ("missing version name in `%s' for symbol `%s'", | |
944 | sym->sy_obj.versioned_name, S_GET_NAME (sym)); | |
945 | ignore_rest_of_line (); | |
946 | return; | |
947 | } | |
948 | ||
d88cc85d ILT |
949 | demand_empty_rest_of_line (); |
950 | } | |
951 | ||
5d0cd0b8 | 952 | void |
6e378515 | 953 | obj_read_begin_hook () |
49864cfa | 954 | { |
f99d287b | 955 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 KR |
956 | if (ECOFF_DEBUGGING) |
957 | ecoff_read_begin_hook (); | |
f99d287b | 958 | #endif |
49864cfa KR |
959 | } |
960 | ||
5d0cd0b8 | 961 | void |
6e378515 KR |
962 | obj_symbol_new_hook (symbolP) |
963 | symbolS *symbolP; | |
49864cfa | 964 | { |
d88cc85d ILT |
965 | symbolP->sy_obj.size = NULL; |
966 | symbolP->sy_obj.versioned_name = NULL; | |
49864cfa | 967 | |
f99d287b | 968 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 KR |
969 | if (ECOFF_DEBUGGING) |
970 | ecoff_symbol_new_hook (symbolP); | |
f99d287b | 971 | #endif |
49864cfa KR |
972 | } |
973 | ||
5d0cd0b8 | 974 | void |
604633ae ILT |
975 | obj_elf_version (ignore) |
976 | int ignore; | |
49864cfa | 977 | { |
6e378515 KR |
978 | char *name; |
979 | unsigned int c; | |
980 | char ch; | |
981 | char *p; | |
982 | asection *seg = now_seg; | |
983 | subsegT subseg = now_subseg; | |
984 | Elf_Internal_Note i_note; | |
985 | Elf_External_Note e_note; | |
986 | asection *note_secp = (asection *) NULL; | |
987 | int i, len; | |
988 | ||
989 | SKIP_WHITESPACE (); | |
990 | if (*input_line_pointer == '\"') | |
991 | { | |
992 | ++input_line_pointer; /* -> 1st char of string. */ | |
49864cfa KR |
993 | name = input_line_pointer; |
994 | ||
6e378515 KR |
995 | while (is_a_char (c = next_char_of_string ())) |
996 | ; | |
49864cfa KR |
997 | c = *input_line_pointer; |
998 | *input_line_pointer = '\0'; | |
6e378515 | 999 | *(input_line_pointer - 1) = '\0'; |
49864cfa KR |
1000 | *input_line_pointer = c; |
1001 | ||
4f0bccc7 | 1002 | /* create the .note section */ |
49864cfa | 1003 | |
4f0bccc7 ILT |
1004 | note_secp = subseg_new (".note", 0); |
1005 | bfd_set_section_flags (stdoutput, | |
1006 | note_secp, | |
1007 | SEC_HAS_CONTENTS | SEC_READONLY); | |
49864cfa KR |
1008 | |
1009 | /* process the version string */ | |
1010 | ||
6e378515 KR |
1011 | len = strlen (name); |
1012 | ||
693b21e7 KR |
1013 | i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */ |
1014 | i_note.descsz = 0; /* no description */ | |
6e378515 KR |
1015 | i_note.type = NT_VERSION; |
1016 | p = frag_more (sizeof (e_note.namesz)); | |
1017 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1018 | p = frag_more (sizeof (e_note.descsz)); | |
1019 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1020 | p = frag_more (sizeof (e_note.type)); | |
1021 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1022 | ||
1023 | for (i = 0; i < len; i++) | |
1024 | { | |
1025 | ch = *(name + i); | |
1026 | { | |
1027 | FRAG_APPEND_1_CHAR (ch); | |
1028 | } | |
1029 | } | |
d88cc85d | 1030 | frag_align (2, 0, 0); |
49864cfa | 1031 | |
604633ae | 1032 | subseg_set (seg, subseg); |
49864cfa | 1033 | } |
6e378515 KR |
1034 | else |
1035 | { | |
693b21e7 | 1036 | as_bad ("Expected quoted string"); |
49864cfa | 1037 | } |
6e378515 | 1038 | demand_empty_rest_of_line (); |
49864cfa KR |
1039 | } |
1040 | ||
1041 | static void | |
604633ae ILT |
1042 | obj_elf_size (ignore) |
1043 | int ignore; | |
49864cfa KR |
1044 | { |
1045 | char *name = input_line_pointer; | |
1046 | char c = get_symbol_end (); | |
1047 | char *p; | |
1048 | expressionS exp; | |
49864cfa KR |
1049 | symbolS *sym; |
1050 | ||
1051 | p = input_line_pointer; | |
1052 | *p = c; | |
1053 | SKIP_WHITESPACE (); | |
1054 | if (*input_line_pointer != ',') | |
1055 | { | |
1056 | *p = 0; | |
1057 | as_bad ("expected comma after name `%s' in .size directive", name); | |
1058 | *p = c; | |
1059 | ignore_rest_of_line (); | |
1060 | return; | |
1061 | } | |
1062 | input_line_pointer++; | |
5ac34ac3 ILT |
1063 | expression (&exp); |
1064 | if (exp.X_op == O_absent) | |
49864cfa KR |
1065 | { |
1066 | as_bad ("missing expression in .size directive"); | |
5ac34ac3 | 1067 | exp.X_op = O_constant; |
49864cfa KR |
1068 | exp.X_add_number = 0; |
1069 | } | |
1070 | *p = 0; | |
1071 | sym = symbol_find_or_make (name); | |
1072 | *p = c; | |
5ac34ac3 | 1073 | if (exp.X_op == O_constant) |
49864cfa KR |
1074 | S_SET_SIZE (sym, exp.X_add_number); |
1075 | else | |
6e378515 | 1076 | { |
d88cc85d ILT |
1077 | sym->sy_obj.size = (expressionS *) xmalloc (sizeof (expressionS)); |
1078 | *sym->sy_obj.size = exp; | |
6e378515 | 1079 | } |
49864cfa KR |
1080 | demand_empty_rest_of_line (); |
1081 | } | |
1082 | ||
e7757ad0 KR |
1083 | /* Handle the ELF .type pseudo-op. This sets the type of a symbol. |
1084 | There are three syntaxes. The first (used on Solaris) is | |
1085 | .type SYM,#function | |
1086 | The second (used on UnixWare) is | |
1087 | .type SYM,@function | |
1088 | The third (reportedly to be used on Irix 6.0) is | |
1089 | .type SYM STT_FUNC | |
3e78d072 | 1090 | */ |
e7757ad0 | 1091 | |
49864cfa | 1092 | static void |
604633ae ILT |
1093 | obj_elf_type (ignore) |
1094 | int ignore; | |
49864cfa | 1095 | { |
e7757ad0 KR |
1096 | char *name; |
1097 | char c; | |
1098 | int type; | |
1099 | const char *typename; | |
49864cfa KR |
1100 | symbolS *sym; |
1101 | ||
e7757ad0 KR |
1102 | name = input_line_pointer; |
1103 | c = get_symbol_end (); | |
1104 | sym = symbol_find_or_make (name); | |
1105 | *input_line_pointer = c; | |
1106 | ||
49864cfa | 1107 | SKIP_WHITESPACE (); |
e7757ad0 KR |
1108 | if (*input_line_pointer == ',') |
1109 | ++input_line_pointer; | |
1110 | ||
49864cfa | 1111 | SKIP_WHITESPACE (); |
e7757ad0 KR |
1112 | if (*input_line_pointer == '#' || *input_line_pointer == '@') |
1113 | ++input_line_pointer; | |
1114 | ||
1115 | typename = input_line_pointer; | |
1116 | c = get_symbol_end (); | |
1117 | ||
1118 | type = 0; | |
1119 | if (strcmp (typename, "function") == 0 | |
1120 | || strcmp (typename, "STT_FUNC") == 0) | |
1121 | type = BSF_FUNCTION; | |
1122 | else if (strcmp (typename, "object") == 0 | |
1123 | || strcmp (typename, "STT_OBJECT") == 0) | |
3e78d072 | 1124 | type = BSF_OBJECT; |
49864cfa | 1125 | else |
e7757ad0 KR |
1126 | as_bad ("ignoring unrecognized symbol type \"%s\"", typename); |
1127 | ||
1128 | *input_line_pointer = c; | |
1129 | ||
6e378515 | 1130 | sym->bsym->flags |= type; |
e7757ad0 KR |
1131 | |
1132 | demand_empty_rest_of_line (); | |
49864cfa KR |
1133 | } |
1134 | ||
1135 | static void | |
604633ae ILT |
1136 | obj_elf_ident (ignore) |
1137 | int ignore; | |
49864cfa | 1138 | { |
6e378515 KR |
1139 | static segT comment_section; |
1140 | segT old_section = now_seg; | |
1141 | int old_subsection = now_subseg; | |
49864cfa | 1142 | |
6e378515 KR |
1143 | if (!comment_section) |
1144 | { | |
1145 | char *p; | |
1146 | comment_section = subseg_new (".comment", 0); | |
fa20b8bf ILT |
1147 | bfd_set_section_flags (stdoutput, comment_section, |
1148 | SEC_READONLY | SEC_HAS_CONTENTS); | |
6e378515 KR |
1149 | p = frag_more (1); |
1150 | *p = 0; | |
1151 | } | |
1152 | else | |
1153 | subseg_set (comment_section, 0); | |
1154 | stringer (1); | |
1155 | subseg_set (old_section, old_subsection); | |
1156 | } | |
1157 | ||
e79cb10b DE |
1158 | #ifdef INIT_STAB_SECTION |
1159 | ||
9bd0d649 ILT |
1160 | /* The first entry in a .stabs section is special. */ |
1161 | ||
1162 | void | |
1163 | obj_elf_init_stab_section (seg) | |
1164 | segT seg; | |
1165 | { | |
fa20b8bf | 1166 | char *file; |
9bd0d649 | 1167 | char *p; |
c5953036 | 1168 | char *stabstr_name; |
9bd0d649 ILT |
1169 | unsigned int stroff; |
1170 | ||
fa20b8bf ILT |
1171 | /* Force the section to align to a longword boundary. Without this, |
1172 | UnixWare ar crashes. */ | |
1173 | bfd_set_section_alignment (stdoutput, seg, 2); | |
1174 | ||
e7757ad0 | 1175 | /* Make space for this first symbol. */ |
9bd0d649 | 1176 | p = frag_more (12); |
e7757ad0 KR |
1177 | /* Zero it out. */ |
1178 | memset (p, 0, 12); | |
fa20b8bf | 1179 | as_where (&file, (unsigned int *) NULL); |
c5953036 ILT |
1180 | stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4); |
1181 | strcpy (stabstr_name, segment_name (seg)); | |
1182 | strcat (stabstr_name, "str"); | |
1183 | stroff = get_stab_string_offset (file, stabstr_name); | |
9bd0d649 ILT |
1184 | know (stroff == 1); |
1185 | md_number_to_chars (p, stroff, 4); | |
1186 | seg_info (seg)->stabu.p = p; | |
1187 | } | |
1188 | ||
e79cb10b DE |
1189 | #endif |
1190 | ||
9bd0d649 ILT |
1191 | /* Fill in the counts in the first entry in a .stabs section. */ |
1192 | ||
693b21e7 KR |
1193 | static void |
1194 | adjust_stab_sections (abfd, sec, xxx) | |
1195 | bfd *abfd; | |
1196 | asection *sec; | |
1197 | PTR xxx; | |
1198 | { | |
1199 | char *name; | |
1200 | asection *strsec; | |
4f0bccc7 | 1201 | char *p; |
693b21e7 KR |
1202 | int strsz, nsyms; |
1203 | ||
1204 | if (strncmp (".stab", sec->name, 5)) | |
1205 | return; | |
1206 | if (!strcmp ("str", sec->name + strlen (sec->name) - 3)) | |
1207 | return; | |
1208 | ||
1209 | name = (char *) alloca (strlen (sec->name) + 4); | |
1210 | strcpy (name, sec->name); | |
1211 | strcat (name, "str"); | |
1212 | strsec = bfd_get_section_by_name (abfd, name); | |
1213 | if (strsec) | |
1214 | strsz = bfd_section_size (abfd, strsec); | |
1215 | else | |
1216 | strsz = 0; | |
1217 | nsyms = bfd_section_size (abfd, sec) / 12 - 1; | |
1218 | ||
4f0bccc7 ILT |
1219 | p = seg_info (sec)->stabu.p; |
1220 | assert (p != 0); | |
693b21e7 | 1221 | |
9bd0d649 ILT |
1222 | bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); |
1223 | bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); | |
693b21e7 KR |
1224 | } |
1225 | ||
f99d287b | 1226 | #ifdef NEED_ECOFF_DEBUG |
c5953036 ILT |
1227 | |
1228 | /* This function is called by the ECOFF code. It is supposed to | |
1229 | record the external symbol information so that the backend can | |
1230 | write it out correctly. The ELF backend doesn't actually handle | |
1231 | this at the moment, so we do it ourselves. We save the information | |
1232 | in the symbol. */ | |
1233 | ||
1234 | void | |
e7757ad0 | 1235 | elf_ecoff_set_ext (sym, ext) |
c5953036 | 1236 | symbolS *sym; |
e7757ad0 | 1237 | struct ecoff_extr *ext; |
c5953036 | 1238 | { |
e7757ad0 | 1239 | sym->bsym->udata.p = (PTR) ext; |
c5953036 ILT |
1240 | } |
1241 | ||
1242 | /* This function is called by bfd_ecoff_debug_externals. It is | |
1243 | supposed to *EXT to the external symbol information, and return | |
1244 | whether the symbol should be used at all. */ | |
1245 | ||
1246 | static boolean | |
1247 | elf_get_extr (sym, ext) | |
1248 | asymbol *sym; | |
1249 | EXTR *ext; | |
1250 | { | |
e7757ad0 | 1251 | if (sym->udata.p == NULL) |
c5953036 | 1252 | return false; |
e7757ad0 | 1253 | *ext = *(EXTR *) sym->udata.p; |
c5953036 ILT |
1254 | return true; |
1255 | } | |
1256 | ||
1257 | /* This function is called by bfd_ecoff_debug_externals. It has | |
1258 | nothing to do for ELF. */ | |
1259 | ||
1260 | /*ARGSUSED*/ | |
1261 | static void | |
1262 | elf_set_index (sym, indx) | |
1263 | asymbol *sym; | |
1264 | bfd_size_type indx; | |
1265 | { | |
1266 | } | |
1267 | ||
f99d287b | 1268 | #endif /* NEED_ECOFF_DEBUG */ |
e7757ad0 KR |
1269 | |
1270 | void | |
1271 | elf_frob_symbol (symp, puntp) | |
1272 | symbolS *symp; | |
1273 | int *puntp; | |
1274 | { | |
f99d287b | 1275 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 KR |
1276 | if (ECOFF_DEBUGGING) |
1277 | ecoff_frob_symbol (symp); | |
f99d287b | 1278 | #endif |
e7757ad0 | 1279 | |
d88cc85d | 1280 | if (symp->sy_obj.size != NULL) |
e7757ad0 | 1281 | { |
d88cc85d | 1282 | switch (symp->sy_obj.size->X_op) |
e7757ad0 KR |
1283 | { |
1284 | case O_subtract: | |
1285 | S_SET_SIZE (symp, | |
d88cc85d ILT |
1286 | (S_GET_VALUE (symp->sy_obj.size->X_add_symbol) |
1287 | + symp->sy_obj.size->X_add_number | |
1288 | - S_GET_VALUE (symp->sy_obj.size->X_op_symbol))); | |
e7757ad0 KR |
1289 | break; |
1290 | case O_constant: | |
1291 | S_SET_SIZE (symp, | |
d88cc85d ILT |
1292 | (S_GET_VALUE (symp->sy_obj.size->X_add_symbol) |
1293 | + symp->sy_obj.size->X_add_number)); | |
e7757ad0 KR |
1294 | break; |
1295 | default: | |
1296 | as_bad (".size expression too complicated to fix up"); | |
1297 | break; | |
1298 | } | |
d88cc85d ILT |
1299 | free (symp->sy_obj.size); |
1300 | symp->sy_obj.size = NULL; | |
1301 | } | |
1302 | ||
1303 | if (symp->sy_obj.versioned_name != NULL) | |
1304 | { | |
1305 | /* This symbol was given a new name with the .symver directive. | |
1306 | ||
1307 | If this is an external reference, just rename the symbol to | |
1308 | include the version string. This will make the relocs be | |
1309 | against the correct versioned symbol. | |
1310 | ||
1311 | If this is a definition, add an alias. FIXME: Using an alias | |
1312 | will permit the debugging information to refer to the right | |
1313 | symbol. However, it's not clear whether it is the best | |
1314 | approach. */ | |
1315 | ||
1316 | if (! S_IS_DEFINED (symp)) | |
2e9974a4 ILT |
1317 | { |
1318 | char *p; | |
1319 | ||
1320 | /* Verify that the name isn't using the @@ syntax--this is | |
1321 | reserved for definitions of the default version to link | |
1322 | against. */ | |
1323 | p = strchr (symp->sy_obj.versioned_name, ELF_VER_CHR); | |
1324 | know (p != NULL); | |
1325 | if (p[1] == ELF_VER_CHR) | |
1326 | { | |
1327 | as_bad ("invalid attempt to declare external version name as default in symbol `%s'", | |
1328 | symp->sy_obj.versioned_name); | |
1329 | *puntp = true; | |
1330 | } | |
1331 | S_SET_NAME (symp, symp->sy_obj.versioned_name); | |
1332 | } | |
d88cc85d ILT |
1333 | else |
1334 | { | |
1335 | symbolS *symp2; | |
1336 | ||
1337 | /* FIXME: Creating a new symbol here is risky. We're in the | |
1338 | final loop over the symbol table. We can get away with | |
1339 | it only because the symbol goes to the end of the list, | |
1340 | where the loop will still see it. It would probably be | |
1341 | better to do this in obj_frob_file_before_adjust. */ | |
1342 | ||
1343 | symp2 = symbol_find_or_make (symp->sy_obj.versioned_name); | |
1344 | ||
1345 | /* Now we act as though we saw symp2 = sym. */ | |
1346 | ||
1347 | S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp)); | |
1348 | ||
1349 | /* Subtracting out the frag address here is a hack because | |
1350 | we are in the middle of the final loop. */ | |
1351 | S_SET_VALUE (symp2, S_GET_VALUE (symp) - symp->sy_frag->fr_address); | |
1352 | ||
1353 | symp2->sy_frag = symp->sy_frag; | |
1354 | ||
1355 | /* This will copy over the size information. */ | |
1356 | copy_symbol_attributes (symp2, symp); | |
1357 | ||
1358 | if (S_IS_WEAK (symp)) | |
1359 | S_SET_WEAK (symp2); | |
1360 | ||
1361 | if (S_IS_EXTERNAL (symp)) | |
1362 | S_SET_EXTERNAL (symp2); | |
1363 | } | |
e7757ad0 | 1364 | } |
e7757ad0 KR |
1365 | |
1366 | /* Double check weak symbols. */ | |
1367 | if (symp->bsym->flags & BSF_WEAK) | |
1368 | { | |
1369 | if (S_IS_COMMON (symp)) | |
1370 | as_bad ("Symbol `%s' can not be both weak and common", | |
1371 | S_GET_NAME (symp)); | |
1372 | } | |
28910c57 MM |
1373 | |
1374 | #ifdef TC_MIPS | |
aff65ed9 ILT |
1375 | /* The Irix 5 and 6 assemblers set the type of any common symbol and |
1376 | any undefined non-function symbol to STT_OBJECT. We try to be compatible, | |
1377 | since newer Irix 5 and 6 linkers care. */ | |
1378 | if (S_IS_COMMON (symp) | |
1379 | || (! S_IS_DEFINED (symp) && ((symp->bsym->flags & BSF_FUNCTION) == 0))) | |
28910c57 MM |
1380 | symp->bsym->flags |= BSF_OBJECT; |
1381 | #endif | |
1382 | ||
1383 | #ifdef TC_PPC | |
1384 | /* Frob the PowerPC, so that the symbol always has object type | |
1385 | if it is not some other type. VxWorks needs this. */ | |
59011c32 MM |
1386 | if ((symp->bsym->flags & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0 |
1387 | && S_IS_DEFINED (symp)) | |
28910c57 MM |
1388 | symp->bsym->flags |= BSF_OBJECT; |
1389 | #endif | |
e7757ad0 | 1390 | } |
c5953036 | 1391 | |
5d0cd0b8 | 1392 | void |
6e378515 KR |
1393 | elf_frob_file () |
1394 | { | |
693b21e7 KR |
1395 | bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0); |
1396 | ||
6e378515 | 1397 | #ifdef elf_tc_final_processing |
5cf4cd1b | 1398 | elf_tc_final_processing (); |
6e378515 | 1399 | #endif |
5d0cd0b8 ILT |
1400 | } |
1401 | ||
1402 | /* It is required that we let write_relocs have the opportunity to | |
1403 | optimize away fixups before output has begun, since it is possible | |
1404 | to eliminate all fixups for a section and thus we never should | |
1405 | have generated the relocation section. */ | |
6e378515 | 1406 | |
5d0cd0b8 ILT |
1407 | void |
1408 | elf_frob_file_after_relocs () | |
1409 | { | |
f99d287b | 1410 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 KR |
1411 | if (ECOFF_DEBUGGING) |
1412 | /* Generate the ECOFF debugging information. */ | |
1413 | { | |
1414 | const struct ecoff_debug_swap *debug_swap; | |
1415 | struct ecoff_debug_info debug; | |
1416 | char *buf; | |
1417 | asection *sec; | |
c5953036 | 1418 | |
e7757ad0 KR |
1419 | debug_swap |
1420 | = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap; | |
1421 | know (debug_swap != (const struct ecoff_debug_swap *) NULL); | |
1422 | ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap); | |
c5953036 | 1423 | |
e7757ad0 | 1424 | /* Set up the pointers in debug. */ |
c5953036 ILT |
1425 | #define SET(ptr, offset, type) \ |
1426 | debug.ptr = (type) (buf + debug.symbolic_header.offset) | |
1427 | ||
5d0cd0b8 | 1428 | SET (line, cbLineOffset, unsigned char *); |
e7757ad0 KR |
1429 | SET (external_dnr, cbDnOffset, PTR); |
1430 | SET (external_pdr, cbPdOffset, PTR); | |
1431 | SET (external_sym, cbSymOffset, PTR); | |
1432 | SET (external_opt, cbOptOffset, PTR); | |
1433 | SET (external_aux, cbAuxOffset, union aux_ext *); | |
1434 | SET (ss, cbSsOffset, char *); | |
1435 | SET (external_fdr, cbFdOffset, PTR); | |
1436 | SET (external_rfd, cbRfdOffset, PTR); | |
1437 | /* ssext and external_ext are set up just below. */ | |
c5953036 | 1438 | |
5d0cd0b8 | 1439 | #undef SET |
c5953036 | 1440 | |
e7757ad0 KR |
1441 | /* Set up the external symbols. */ |
1442 | debug.ssext = debug.ssext_end = NULL; | |
1443 | debug.external_ext = debug.external_ext_end = NULL; | |
1444 | if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true, | |
1445 | elf_get_extr, elf_set_index)) | |
1446 | as_fatal ("Failed to set up debugging information: %s", | |
1447 | bfd_errmsg (bfd_get_error ())); | |
1448 | ||
1449 | sec = bfd_get_section_by_name (stdoutput, ".mdebug"); | |
1450 | assert (sec != NULL); | |
1451 | ||
1452 | know (stdoutput->output_has_begun == false); | |
1453 | ||
1454 | /* We set the size of the section, call bfd_set_section_contents | |
1455 | to force the ELF backend to allocate a file position, and then | |
1456 | write out the data. FIXME: Is this really the best way to do | |
1457 | this? */ | |
1458 | sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap); | |
1459 | ||
1460 | if (! bfd_set_section_contents (stdoutput, sec, (PTR) NULL, | |
1461 | (file_ptr) 0, (bfd_size_type) 0)) | |
1462 | as_fatal ("Can't start writing .mdebug section: %s", | |
1463 | bfd_errmsg (bfd_get_error ())); | |
1464 | ||
1465 | know (stdoutput->output_has_begun == true); | |
1466 | know (sec->filepos != 0); | |
1467 | ||
1468 | if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap, | |
1469 | sec->filepos)) | |
1470 | as_fatal ("Could not write .mdebug section: %s", | |
1471 | bfd_errmsg (bfd_get_error ())); | |
1472 | } | |
f99d287b | 1473 | #endif /* NEED_ECOFF_DEBUG */ |
49864cfa | 1474 | } |
e7757ad0 | 1475 | |
d88cc85d ILT |
1476 | #ifdef SCO_ELF |
1477 | ||
1478 | /* Heavily plagarized from obj_elf_version. The idea is to emit the | |
1479 | SCO specific identifier in the .notes section to satisfy the SCO | |
1480 | linker. | |
1481 | ||
1482 | This looks more complicated than it really is. As opposed to the | |
1483 | "obvious" solution, this should handle the cross dev cases | |
1484 | correctly. (i.e, hosting on a 64 bit big endian processor, but | |
1485 | generating SCO Elf code) Efficiency isn't a concern, as there | |
1486 | should be exactly one of these sections per object module. | |
1487 | ||
1488 | SCO OpenServer 5 identifies it's ELF modules with a standard ELF | |
1489 | .note section. | |
1490 | ||
1491 | int_32 namesz = 4 ; Name size | |
1492 | int_32 descsz = 12 ; Descriptive information | |
1493 | int_32 type = 1 ; | |
1494 | char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL | |
1495 | int_32 version = (major ver # << 16) | version of tools ; | |
1496 | int_32 source = (tool_id << 16 ) | 1 ; | |
1497 | int_32 info = 0 ; These are set by the SCO tools, but we | |
1498 | don't know enough about the source | |
1499 | environment to set them. SCO ld currently | |
1500 | ignores them, and recommends we set them | |
1501 | to zero. */ | |
1502 | ||
1503 | #define SCO_MAJOR_VERSION 0x1 | |
1504 | #define SCO_MINOR_VERSION 0x1 | |
1505 | ||
1506 | void | |
1507 | sco_id () | |
1508 | { | |
1509 | ||
1510 | char *name; | |
1511 | unsigned int c; | |
1512 | char ch; | |
1513 | char *p; | |
1514 | asection *seg = now_seg; | |
1515 | subsegT subseg = now_subseg; | |
1516 | Elf_Internal_Note i_note; | |
1517 | Elf_External_Note e_note; | |
1518 | asection *note_secp = (asection *) NULL; | |
1519 | int i, len; | |
1520 | ||
1521 | /* create the .note section */ | |
1522 | ||
1523 | note_secp = subseg_new (".note", 0); | |
1524 | bfd_set_section_flags (stdoutput, | |
1525 | note_secp, | |
1526 | SEC_HAS_CONTENTS | SEC_READONLY); | |
1527 | ||
1528 | /* process the version string */ | |
1529 | ||
1530 | i_note.namesz = 4; | |
1531 | i_note.descsz = 12; /* 12 descriptive bytes */ | |
1532 | i_note.type = NT_VERSION; /* Contains a version string */ | |
1533 | ||
1534 | p = frag_more (sizeof (i_note.namesz)); | |
1535 | md_number_to_chars (p, (valueT) i_note.namesz, 4); | |
1536 | ||
1537 | p = frag_more (sizeof (i_note.descsz)); | |
1538 | md_number_to_chars (p, (valueT) i_note.descsz, 4); | |
1539 | ||
1540 | p = frag_more (sizeof (i_note.type)); | |
1541 | md_number_to_chars (p, (valueT) i_note.type, 4); | |
1542 | ||
1543 | p = frag_more (4); | |
1544 | strcpy (p, "SCO"); | |
1545 | ||
1546 | /* Note: this is the version number of the ELF we're representing */ | |
1547 | p = frag_more (4); | |
1548 | md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4); | |
1549 | ||
1550 | /* Here, we pick a magic number for ourselves (yes, I "registered" | |
1551 | it with SCO. The bottom bit shows that we are compat with the | |
1552 | SCO ABI. */ | |
1553 | p = frag_more (4); | |
1554 | md_number_to_chars (p, 0x4c520000 | 0x0001, 4); | |
1555 | ||
1556 | /* If we knew (or cared) what the source language options were, we'd | |
1557 | fill them in here. SCO has given us permission to ignore these | |
1558 | and just set them to zero. */ | |
1559 | p = frag_more (4); | |
1560 | md_number_to_chars (p, 0x0000, 4); | |
1561 | ||
1562 | frag_align (2, 0, 0); | |
1563 | ||
1564 | /* We probably can't restore the current segment, for there likely | |
1565 | isn't one yet... */ | |
1566 | if (seg && subseg) | |
1567 | subseg_set (seg, subseg); | |
1568 | ||
1569 | } | |
1570 | ||
1571 | #endif /* SCO_ELF */ | |
1572 | ||
e7757ad0 KR |
1573 | const struct format_ops elf_format_ops = |
1574 | { | |
1575 | bfd_target_elf_flavour, | |
1576 | 0, | |
1577 | 1, | |
1578 | elf_frob_symbol, | |
1579 | elf_frob_file, | |
ba8f9c09 | 1580 | elf_frob_file_after_relocs, |
e7757ad0 KR |
1581 | elf_s_get_size, elf_s_set_size, |
1582 | elf_s_get_align, elf_s_set_align, | |
1583 | elf_copy_symbol_attributes, | |
f99d287b | 1584 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 | 1585 | ecoff_generate_asm_lineno, |
f99d287b | 1586 | ecoff_stab, |
e7757ad0 KR |
1587 | #else |
1588 | 0, | |
e7757ad0 | 1589 | 0, /* process_stab */ |
f99d287b | 1590 | #endif |
e7757ad0 KR |
1591 | elf_sec_sym_ok_for_reloc, |
1592 | elf_pop_insert, | |
f99d287b | 1593 | #ifdef NEED_ECOFF_DEBUG |
e7757ad0 | 1594 | elf_ecoff_set_ext, |
f99d287b MM |
1595 | #else |
1596 | 0, | |
1597 | #endif | |
e7757ad0 KR |
1598 | obj_read_begin_hook, |
1599 | obj_symbol_new_hook, | |
1600 | }; |