Commit | Line | Data |
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bd52eafb | 1 | /* yyscript.y -- linker script grammar for gold. */ |
dbe717ef | 2 | |
e5756efb | 3 | /* Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | This file is part of gold. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
22 | ||
dbe717ef ILT |
23 | /* This is a bison grammar to parse a subset of the original GNU ld |
24 | linker script language. */ | |
25 | ||
26 | %{ | |
27 | ||
28 | #include "config.h" | |
29 | ||
30 | #include <stddef.h> | |
31 | #include <stdint.h> | |
494e05f4 | 32 | #include <stdlib.h> |
1c4f3631 | 33 | #include <string.h> |
dbe717ef ILT |
34 | |
35 | #include "script-c.h" | |
36 | ||
37 | %} | |
38 | ||
39 | /* We need to use a pure parser because we might be multi-threaded. | |
40 | We pass some arguments through the parser to the lexer. */ | |
41 | ||
42 | %pure-parser | |
43 | ||
44 | %parse-param {void* closure} | |
45 | %lex-param {void* closure} | |
46 | ||
47 | /* Since we require bison anyhow, we take advantage of it. */ | |
48 | ||
49 | %error-verbose | |
50 | ||
51 | /* The values associated with tokens. */ | |
52 | ||
53 | %union { | |
e5756efb ILT |
54 | /* A string. */ |
55 | struct Parser_string string; | |
56 | /* A number. */ | |
57 | uint64_t integer; | |
58 | /* An expression. */ | |
59 | Expression_ptr expr; | |
494e05f4 ILT |
60 | /* An output section header. */ |
61 | struct Parser_output_section_header output_section_header; | |
62 | /* An output section trailer. */ | |
63 | struct Parser_output_section_trailer output_section_trailer; | |
3802b2dd ILT |
64 | /* A section constraint. */ |
65 | enum Section_constraint constraint; | |
494e05f4 ILT |
66 | /* A complete input section specification. */ |
67 | struct Input_section_spec input_section_spec; | |
68 | /* A list of wildcard specifications, with exclusions. */ | |
69 | struct Wildcard_sections wildcard_sections; | |
70 | /* A single wildcard specification. */ | |
71 | struct Wildcard_section wildcard_section; | |
72 | /* A list of strings. */ | |
73 | String_list_ptr string_list; | |
1c4f3631 ILT |
74 | /* Information for a program header. */ |
75 | struct Phdr_info phdr_info; | |
494e05f4 | 76 | /* Used for version scripts and within VERSION {}. */ |
09124467 ILT |
77 | struct Version_dependency_list* deplist; |
78 | struct Version_expression_list* versyms; | |
79 | struct Version_tree* versnode; | |
dbe717ef ILT |
80 | } |
81 | ||
82 | /* Operators, including a precedence table for expressions. */ | |
83 | ||
84 | %right PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ | |
85 | %right '?' ':' | |
86 | %left OROR | |
87 | %left ANDAND | |
88 | %left '|' | |
89 | %left '^' | |
90 | %left '&' | |
91 | %left EQ NE | |
92 | %left '<' '>' LE GE | |
93 | %left LSHIFT RSHIFT | |
94 | %left '+' '-' | |
95 | %left '*' '/' '%' | |
96 | ||
e5756efb ILT |
97 | /* A fake operator used to indicate unary operator precedence. */ |
98 | %right UNARY | |
99 | ||
dbe717ef ILT |
100 | /* Constants. */ |
101 | ||
102 | %token <string> STRING | |
10600224 | 103 | %token <string> QUOTED_STRING |
dbe717ef ILT |
104 | %token <integer> INTEGER |
105 | ||
106 | /* Keywords. This list is taken from ldgram.y and ldlex.l in the old | |
107 | GNU linker, with the keywords which only appear in MRI mode | |
108 | removed. Not all these keywords are actually used in this grammar. | |
109 | In most cases the keyword is recognized as the token name in upper | |
110 | case. The comments indicate where this is not the case. */ | |
111 | ||
112 | %token ABSOLUTE | |
113 | %token ADDR | |
114 | %token ALIGN_K /* ALIGN */ | |
e5756efb | 115 | %token ALIGNOF |
dbe717ef ILT |
116 | %token ASSERT_K /* ASSERT */ |
117 | %token AS_NEEDED | |
118 | %token AT | |
119 | %token BIND | |
120 | %token BLOCK | |
121 | %token BYTE | |
122 | %token CONSTANT | |
123 | %token CONSTRUCTORS | |
dbe717ef ILT |
124 | %token CREATE_OBJECT_SYMBOLS |
125 | %token DATA_SEGMENT_ALIGN | |
126 | %token DATA_SEGMENT_END | |
127 | %token DATA_SEGMENT_RELRO_END | |
128 | %token DEFINED | |
dbe717ef ILT |
129 | %token ENTRY |
130 | %token EXCLUDE_FILE | |
131 | %token EXTERN | |
132 | %token FILL | |
133 | %token FLOAT | |
134 | %token FORCE_COMMON_ALLOCATION | |
135 | %token GLOBAL /* global */ | |
136 | %token GROUP | |
137 | %token HLL | |
138 | %token INCLUDE | |
dbe717ef ILT |
139 | %token INHIBIT_COMMON_ALLOCATION |
140 | %token INPUT | |
141 | %token KEEP | |
142 | %token LENGTH /* LENGTH, l, len */ | |
143 | %token LOADADDR | |
144 | %token LOCAL /* local */ | |
145 | %token LONG | |
146 | %token MAP | |
147 | %token MAX_K /* MAX */ | |
148 | %token MEMORY | |
149 | %token MIN_K /* MIN */ | |
150 | %token NEXT | |
151 | %token NOCROSSREFS | |
152 | %token NOFLOAT | |
dbe717ef ILT |
153 | %token ONLY_IF_RO |
154 | %token ONLY_IF_RW | |
155 | %token ORIGIN /* ORIGIN, o, org */ | |
156 | %token OUTPUT | |
157 | %token OUTPUT_ARCH | |
158 | %token OUTPUT_FORMAT | |
159 | %token OVERLAY | |
160 | %token PHDRS | |
161 | %token PROVIDE | |
162 | %token PROVIDE_HIDDEN | |
163 | %token QUAD | |
164 | %token SEARCH_DIR | |
165 | %token SECTIONS | |
166 | %token SEGMENT_START | |
167 | %token SHORT | |
168 | %token SIZEOF | |
169 | %token SIZEOF_HEADERS /* SIZEOF_HEADERS, sizeof_headers */ | |
170 | %token SORT_BY_ALIGNMENT | |
171 | %token SORT_BY_NAME | |
172 | %token SPECIAL | |
173 | %token SQUAD | |
174 | %token STARTUP | |
175 | %token SUBALIGN | |
176 | %token SYSLIB | |
177 | %token TARGET_K /* TARGET */ | |
178 | %token TRUNCATE | |
179 | %token VERSIONK /* VERSION */ | |
180 | ||
195e7dc6 ILT |
181 | /* Keywords, part 2. These are keywords that are unique to gold, |
182 | and not present in the old GNU linker. As before, unless the | |
183 | comments say otherwise, the keyword is recognized as the token | |
184 | name in upper case. */ | |
185 | ||
186 | %token OPTION | |
187 | ||
e5756efb ILT |
188 | /* Special tokens used to tell the grammar what type of tokens we are |
189 | parsing. The token stream always begins with one of these tokens. | |
190 | We do this because version scripts can appear embedded within | |
191 | linker scripts, and because --defsym uses the expression | |
192 | parser. */ | |
193 | %token PARSING_LINKER_SCRIPT | |
194 | %token PARSING_VERSION_SCRIPT | |
195 | %token PARSING_DEFSYM | |
c82fbeee | 196 | %token PARSING_DYNAMIC_LIST |
e5756efb ILT |
197 | |
198 | /* Non-terminal types, where needed. */ | |
199 | ||
494e05f4 ILT |
200 | %type <expr> parse_exp exp opt_address_and_section_type |
201 | %type <expr> opt_at opt_align opt_subalign opt_fill | |
202 | %type <output_section_header> section_header | |
203 | %type <output_section_trailer> section_trailer | |
3802b2dd | 204 | %type <constraint> opt_constraint |
1c4f3631 | 205 | %type <string_list> opt_phdr |
494e05f4 ILT |
206 | %type <integer> data_length |
207 | %type <input_section_spec> input_section_no_keep | |
208 | %type <wildcard_sections> wildcard_sections | |
209 | %type <wildcard_section> wildcard_file wildcard_section | |
210 | %type <string_list> exclude_names | |
211 | %type <string> wildcard_name | |
1c4f3631 ILT |
212 | %type <integer> phdr_type |
213 | %type <phdr_info> phdr_info | |
09124467 ILT |
214 | %type <versyms> vers_defns |
215 | %type <versnode> vers_tag | |
216 | %type <deplist> verdep | |
10600224 | 217 | %type <string> string |
e5756efb | 218 | |
dbe717ef ILT |
219 | %% |
220 | ||
e5756efb ILT |
221 | /* Read the special token to see what to read next. */ |
222 | top: | |
223 | PARSING_LINKER_SCRIPT linker_script | |
224 | | PARSING_VERSION_SCRIPT version_script | |
225 | | PARSING_DEFSYM defsym_expr | |
c82fbeee | 226 | | PARSING_DYNAMIC_LIST dynamic_list_expr |
e5756efb ILT |
227 | ; |
228 | ||
d391083d | 229 | /* A file contains a list of commands. */ |
e5756efb ILT |
230 | linker_script: |
231 | linker_script file_cmd | |
dbe717ef ILT |
232 | | /* empty */ |
233 | ; | |
234 | ||
d391083d | 235 | /* A command which may appear at top level of a linker script. */ |
dbe717ef | 236 | file_cmd: |
0dfbdef4 ILT |
237 | FORCE_COMMON_ALLOCATION |
238 | { script_set_common_allocation(closure, 1); } | |
239 | | GROUP | |
dbe717ef ILT |
240 | { script_start_group(closure); } |
241 | '(' input_list ')' | |
242 | { script_end_group(closure); } | |
0dfbdef4 ILT |
243 | | INHIBIT_COMMON_ALLOCATION |
244 | { script_set_common_allocation(closure, 0); } | |
fbc558e1 | 245 | | INPUT '(' input_list ')' |
10600224 | 246 | | OPTION '(' string ')' |
e5756efb | 247 | { script_parse_option(closure, $3.value, $3.length); } |
15f8229b ILT |
248 | | OUTPUT_FORMAT '(' string ')' |
249 | { | |
250 | if (!script_check_output_format(closure, $3.value, $3.length, | |
251 | NULL, 0, NULL, 0)) | |
252 | YYABORT; | |
253 | } | |
254 | | OUTPUT_FORMAT '(' string ',' string ',' string ')' | |
255 | { | |
256 | if (!script_check_output_format(closure, $3.value, $3.length, | |
257 | $5.value, $5.length, | |
258 | $7.value, $7.length)) | |
259 | YYABORT; | |
260 | } | |
1c4f3631 | 261 | | PHDRS '{' phdrs_defs '}' |
3802b2dd ILT |
262 | | SEARCH_DIR '(' string ')' |
263 | { script_add_search_dir(closure, $3.value, $3.length); } | |
494e05f4 ILT |
264 | | SECTIONS '{' |
265 | { script_start_sections(closure); } | |
266 | sections_block '}' | |
267 | { script_finish_sections(closure); } | |
09124467 ILT |
268 | | VERSIONK '{' |
269 | { script_push_lex_into_version_mode(closure); } | |
270 | version_script '}' | |
271 | { script_pop_lex_mode(closure); } | |
d391083d | 272 | | file_or_sections_cmd |
2dd3e587 | 273 | | ignore_cmd |
3802b2dd | 274 | | ';' |
2dd3e587 ILT |
275 | ; |
276 | ||
277 | /* Top level commands which we ignore. The GNU linker uses these to | |
278 | select the output format, but we don't offer a choice. Ignoring | |
279 | these is more-or-less OK since most scripts simply explicitly | |
280 | choose the default. */ | |
281 | ignore_cmd: | |
15f8229b | 282 | OUTPUT_ARCH '(' string ')' |
dbe717ef ILT |
283 | ; |
284 | ||
d391083d | 285 | /* A list of input file names. */ |
dbe717ef ILT |
286 | input_list: |
287 | input_list_element | |
288 | | input_list opt_comma input_list_element | |
289 | ; | |
290 | ||
d391083d | 291 | /* An input file name. */ |
dbe717ef | 292 | input_list_element: |
10600224 | 293 | string |
e5756efb | 294 | { script_add_file(closure, $1.value, $1.length); } |
dbe717ef ILT |
295 | | AS_NEEDED |
296 | { script_start_as_needed(closure); } | |
297 | '(' input_list ')' | |
298 | { script_end_as_needed(closure); } | |
299 | ; | |
300 | ||
494e05f4 ILT |
301 | /* Commands in a SECTIONS block. */ |
302 | sections_block: | |
303 | sections_block section_block_cmd | |
304 | | /* empty */ | |
305 | ; | |
306 | ||
307 | /* A command which may appear within a SECTIONS block. */ | |
308 | section_block_cmd: | |
309 | file_or_sections_cmd | |
e4967d85 | 310 | | string section_header |
494e05f4 ILT |
311 | { script_start_output_section(closure, $1.value, $1.length, &$2); } |
312 | '{' section_cmds '}' section_trailer | |
313 | { script_finish_output_section(closure, &$7); } | |
314 | ; | |
315 | ||
316 | /* The header of an output section in a SECTIONS block--everything | |
317 | after the name. */ | |
318 | section_header: | |
319 | { script_push_lex_into_expression_mode(closure); } | |
320 | opt_address_and_section_type opt_at opt_align opt_subalign | |
3802b2dd ILT |
321 | { script_pop_lex_mode(closure); } |
322 | opt_constraint | |
494e05f4 ILT |
323 | { |
324 | $$.address = $2; | |
325 | $$.load_address = $3; | |
326 | $$.align = $4; | |
327 | $$.subalign = $5; | |
3802b2dd | 328 | $$.constraint = $7; |
494e05f4 ILT |
329 | } |
330 | ; | |
331 | ||
332 | /* The optional address followed by the optional section type. This | |
333 | is a separate nonterminal to avoid a shift/reduce conflict on | |
334 | '(' in section_header. */ | |
335 | ||
336 | opt_address_and_section_type: | |
337 | ':' | |
338 | { $$ = NULL; } | |
339 | | '(' ')' ':' | |
340 | { $$ = NULL; } | |
341 | | exp ':' | |
342 | { $$ = $1; } | |
343 | | exp '(' ')' ':' | |
344 | { $$ = $1; } | |
e4967d85 | 345 | | exp '(' string ')' ':' |
494e05f4 ILT |
346 | { |
347 | yyerror(closure, "section types are not supported"); | |
348 | $$ = $1; | |
349 | } | |
350 | ; | |
351 | ||
352 | /* The address at which an output section should be loaded. */ | |
353 | opt_at: | |
354 | /* empty */ | |
355 | { $$ = NULL; } | |
356 | | AT '(' exp ')' | |
357 | { $$ = $3; } | |
358 | ; | |
359 | ||
360 | /* The alignment of an output section. */ | |
361 | opt_align: | |
362 | /* empty */ | |
363 | { $$ = NULL; } | |
364 | | ALIGN_K '(' exp ')' | |
365 | { $$ = $3; } | |
366 | ; | |
367 | ||
368 | /* The input section alignment within an output section. */ | |
369 | opt_subalign: | |
370 | /* empty */ | |
371 | { $$ = NULL; } | |
372 | | SUBALIGN '(' exp ')' | |
373 | { $$ = $3; } | |
374 | ; | |
375 | ||
3802b2dd ILT |
376 | /* A section constraint. */ |
377 | opt_constraint: | |
378 | /* empty */ | |
379 | { $$ = CONSTRAINT_NONE; } | |
380 | | ONLY_IF_RO | |
381 | { $$ = CONSTRAINT_ONLY_IF_RO; } | |
382 | | ONLY_IF_RW | |
383 | { $$ = CONSTRAINT_ONLY_IF_RW; } | |
384 | | SPECIAL | |
385 | { $$ = CONSTRAINT_SPECIAL; } | |
386 | ; | |
387 | ||
494e05f4 ILT |
388 | /* The trailer of an output section in a SECTIONS block. */ |
389 | section_trailer: | |
494e05f4 ILT |
390 | opt_memspec opt_at_memspec opt_phdr opt_fill opt_comma |
391 | { | |
3802b2dd | 392 | $$.fill = $4; |
1c4f3631 | 393 | $$.phdrs = $3; |
494e05f4 ILT |
394 | } |
395 | ; | |
396 | ||
397 | /* A memory specification for an output section. */ | |
398 | opt_memspec: | |
e4967d85 | 399 | '>' string |
494e05f4 ILT |
400 | { yyerror(closure, "memory regions are not supported"); } |
401 | | /* empty */ | |
402 | ; | |
403 | ||
404 | /* A memory specification for where to load an output section. */ | |
405 | opt_at_memspec: | |
e4967d85 | 406 | AT '>' string |
494e05f4 ILT |
407 | { yyerror(closure, "memory regions are not supported"); } |
408 | | /* empty */ | |
409 | ; | |
410 | ||
411 | /* The program segment an output section should go into. */ | |
412 | opt_phdr: | |
e4967d85 | 413 | opt_phdr ':' string |
1c4f3631 | 414 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } |
494e05f4 | 415 | | /* empty */ |
1c4f3631 | 416 | { $$ = NULL; } |
494e05f4 ILT |
417 | ; |
418 | ||
a445fddf ILT |
419 | /* The value to use to fill an output section. FIXME: This does not |
420 | handle a string of arbitrary length. */ | |
494e05f4 | 421 | opt_fill: |
3802b2dd | 422 | '=' parse_exp |
494e05f4 ILT |
423 | { $$ = $2; } |
424 | | /* empty */ | |
425 | { $$ = NULL; } | |
426 | ; | |
427 | ||
428 | /* Commands which may appear within the description of an output | |
429 | section in a SECTIONS block. */ | |
430 | section_cmds: | |
431 | /* empty */ | |
432 | | section_cmds section_cmd | |
433 | ; | |
434 | ||
435 | /* A command which may appear within the description of an output | |
436 | section in a SECTIONS block. */ | |
437 | section_cmd: | |
438 | assignment end | |
439 | | input_section_spec | |
440 | | data_length '(' parse_exp ')' | |
441 | { script_add_data(closure, $1, $3); } | |
e4967d85 | 442 | | ASSERT_K '(' parse_exp ',' string ')' |
494e05f4 ILT |
443 | { script_add_assertion(closure, $3, $5.value, $5.length); } |
444 | | FILL '(' parse_exp ')' | |
445 | { script_add_fill(closure, $3); } | |
446 | | CONSTRUCTORS | |
447 | { | |
448 | /* The GNU linker uses CONSTRUCTORS for the a.out object | |
449 | file format. It does nothing when using ELF. Since | |
450 | some ELF linker scripts use it although it does | |
451 | nothing, we accept it and ignore it. */ | |
452 | } | |
3802b2dd | 453 | | SORT_BY_NAME '(' CONSTRUCTORS ')' |
494e05f4 ILT |
454 | | ';' |
455 | ; | |
456 | ||
457 | /* The length of data which may appear within the description of an | |
458 | output section in a SECTIONS block. */ | |
459 | data_length: | |
460 | QUAD | |
461 | { $$ = QUAD; } | |
462 | | SQUAD | |
463 | { $$ = SQUAD; } | |
464 | | LONG | |
465 | { $$ = LONG; } | |
466 | | SHORT | |
467 | { $$ = SHORT; } | |
468 | | BYTE | |
469 | { $$ = BYTE; } | |
470 | ; | |
471 | ||
472 | /* An input section specification. This may appear within the | |
473 | description of an output section in a SECTIONS block. */ | |
474 | input_section_spec: | |
475 | input_section_no_keep | |
476 | { script_add_input_section(closure, &$1, 0); } | |
477 | | KEEP '(' input_section_no_keep ')' | |
478 | { script_add_input_section(closure, &$3, 1); } | |
479 | ; | |
480 | ||
481 | /* An input section specification within a KEEP clause. */ | |
482 | input_section_no_keep: | |
e4967d85 | 483 | string |
494e05f4 ILT |
484 | { |
485 | $$.file.name = $1; | |
486 | $$.file.sort = SORT_WILDCARD_NONE; | |
487 | $$.input_sections.sections = NULL; | |
488 | $$.input_sections.exclude = NULL; | |
489 | } | |
490 | | wildcard_file '(' wildcard_sections ')' | |
491 | { | |
492 | $$.file = $1; | |
493 | $$.input_sections = $3; | |
494 | } | |
495 | ; | |
496 | ||
497 | /* A wildcard file specification. */ | |
498 | wildcard_file: | |
499 | wildcard_name | |
500 | { | |
501 | $$.name = $1; | |
502 | $$.sort = SORT_WILDCARD_NONE; | |
503 | } | |
504 | | SORT_BY_NAME '(' wildcard_name ')' | |
505 | { | |
506 | $$.name = $3; | |
507 | $$.sort = SORT_WILDCARD_BY_NAME; | |
508 | } | |
509 | ; | |
510 | ||
511 | /* A list of wild card section specifications. */ | |
512 | wildcard_sections: | |
513 | wildcard_sections opt_comma wildcard_section | |
514 | { | |
515 | $$.sections = script_string_sort_list_add($1.sections, &$3); | |
516 | $$.exclude = $1.exclude; | |
517 | } | |
518 | | wildcard_section | |
519 | { | |
520 | $$.sections = script_new_string_sort_list(&$1); | |
521 | $$.exclude = NULL; | |
522 | } | |
523 | | wildcard_sections opt_comma EXCLUDE_FILE '(' exclude_names ')' | |
524 | { | |
525 | $$.sections = $1.sections; | |
526 | $$.exclude = script_string_list_append($1.exclude, $5); | |
527 | } | |
528 | | EXCLUDE_FILE '(' exclude_names ')' | |
529 | { | |
530 | $$.sections = NULL; | |
531 | $$.exclude = $3; | |
532 | } | |
533 | ; | |
534 | ||
535 | /* A single wild card specification. */ | |
536 | wildcard_section: | |
537 | wildcard_name | |
538 | { | |
539 | $$.name = $1; | |
540 | $$.sort = SORT_WILDCARD_NONE; | |
541 | } | |
542 | | SORT_BY_NAME '(' wildcard_section ')' | |
543 | { | |
544 | $$.name = $3.name; | |
545 | switch ($3.sort) | |
546 | { | |
547 | case SORT_WILDCARD_NONE: | |
548 | $$.sort = SORT_WILDCARD_BY_NAME; | |
549 | break; | |
550 | case SORT_WILDCARD_BY_NAME: | |
551 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
552 | break; | |
553 | case SORT_WILDCARD_BY_ALIGNMENT: | |
554 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
555 | $$.sort = SORT_WILDCARD_BY_NAME_BY_ALIGNMENT; | |
556 | break; | |
557 | default: | |
558 | abort(); | |
559 | } | |
560 | } | |
561 | | SORT_BY_ALIGNMENT '(' wildcard_section ')' | |
562 | { | |
563 | $$.name = $3.name; | |
564 | switch ($3.sort) | |
565 | { | |
566 | case SORT_WILDCARD_NONE: | |
567 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT; | |
568 | break; | |
569 | case SORT_WILDCARD_BY_ALIGNMENT: | |
570 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
571 | break; | |
572 | case SORT_WILDCARD_BY_NAME: | |
573 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
574 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT_BY_NAME; | |
575 | break; | |
576 | default: | |
577 | abort(); | |
578 | } | |
579 | } | |
580 | ; | |
581 | ||
582 | /* A list of file names to exclude. */ | |
583 | exclude_names: | |
584 | exclude_names opt_comma wildcard_name | |
585 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } | |
586 | | wildcard_name | |
587 | { $$ = script_new_string_list($1.value, $1.length); } | |
588 | ; | |
589 | ||
590 | /* A single wildcard name. We recognize '*' and '?' specially since | |
591 | they are expression tokens. */ | |
592 | wildcard_name: | |
e4967d85 | 593 | string |
494e05f4 ILT |
594 | { $$ = $1; } |
595 | | '*' | |
596 | { | |
597 | $$.value = "*"; | |
598 | $$.length = 1; | |
599 | } | |
600 | | '?' | |
601 | { | |
602 | $$.value = "?"; | |
603 | $$.length = 1; | |
604 | } | |
605 | ; | |
606 | ||
d391083d ILT |
607 | /* A command which may appear at the top level of a linker script, or |
608 | within a SECTIONS block. */ | |
609 | file_or_sections_cmd: | |
10600224 | 610 | ENTRY '(' string ')' |
e5756efb ILT |
611 | { script_set_entry(closure, $3.value, $3.length); } |
612 | | assignment end | |
e4967d85 | 613 | | ASSERT_K '(' parse_exp ',' string ')' |
494e05f4 | 614 | { script_add_assertion(closure, $3, $5.value, $5.length); } |
e5756efb ILT |
615 | ; |
616 | ||
1c4f3631 ILT |
617 | /* A list of program header definitions. */ |
618 | phdrs_defs: | |
619 | phdrs_defs phdr_def | |
620 | | /* empty */ | |
621 | ; | |
622 | ||
623 | /* A program header definition. */ | |
624 | phdr_def: | |
625 | string phdr_type phdr_info ';' | |
626 | { script_add_phdr(closure, $1.value, $1.length, $2, &$3); } | |
627 | ; | |
628 | ||
629 | /* A program header type. The GNU linker accepts a general expression | |
630 | here, but that would be a pain because we would have to dig into | |
631 | the expression structure. It's unlikely that anybody uses anything | |
632 | other than a string or a number here, so that is all we expect. */ | |
633 | phdr_type: | |
634 | string | |
635 | { $$ = script_phdr_string_to_type(closure, $1.value, $1.length); } | |
636 | | INTEGER | |
637 | { $$ = $1; } | |
638 | ; | |
639 | ||
640 | /* Additional information for a program header. */ | |
641 | phdr_info: | |
642 | /* empty */ | |
643 | { memset(&$$, 0, sizeof(struct Phdr_info)); } | |
644 | | string phdr_info | |
645 | { | |
646 | $$ = $2; | |
647 | if ($1.length == 7 && strncmp($1.value, "FILEHDR", 7) == 0) | |
648 | $$.includes_filehdr = 1; | |
649 | else | |
650 | yyerror(closure, "PHDRS syntax error"); | |
651 | } | |
652 | | PHDRS phdr_info | |
653 | { | |
654 | $$ = $2; | |
655 | $$.includes_phdrs = 1; | |
656 | } | |
657 | | string '(' INTEGER ')' phdr_info | |
658 | { | |
659 | $$ = $5; | |
660 | if ($1.length == 5 && strncmp($1.value, "FLAGS", 5) == 0) | |
661 | { | |
662 | $$.is_flags_valid = 1; | |
663 | $$.flags = $3; | |
664 | } | |
665 | else | |
666 | yyerror(closure, "PHDRS syntax error"); | |
667 | } | |
668 | | AT '(' parse_exp ')' phdr_info | |
669 | { | |
670 | $$ = $5; | |
671 | $$.load_address = $3; | |
672 | } | |
673 | ; | |
674 | ||
e5756efb ILT |
675 | /* Set a symbol to a value. */ |
676 | assignment: | |
10600224 | 677 | string '=' parse_exp |
e5756efb | 678 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
10600224 | 679 | | string PLUSEQ parse_exp |
e5756efb ILT |
680 | { |
681 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
682 | Expression_ptr e = script_exp_binary_add(s, $3); | |
683 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
684 | } | |
10600224 | 685 | | string MINUSEQ parse_exp |
e5756efb ILT |
686 | { |
687 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
688 | Expression_ptr e = script_exp_binary_sub(s, $3); | |
689 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
690 | } | |
10600224 | 691 | | string MULTEQ parse_exp |
e5756efb ILT |
692 | { |
693 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
694 | Expression_ptr e = script_exp_binary_mult(s, $3); | |
695 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
696 | } | |
10600224 | 697 | | string DIVEQ parse_exp |
e5756efb ILT |
698 | { |
699 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
700 | Expression_ptr e = script_exp_binary_div(s, $3); | |
701 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
702 | } | |
10600224 | 703 | | string LSHIFTEQ parse_exp |
e5756efb ILT |
704 | { |
705 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
706 | Expression_ptr e = script_exp_binary_lshift(s, $3); | |
707 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
708 | } | |
10600224 | 709 | | string RSHIFTEQ parse_exp |
e5756efb ILT |
710 | { |
711 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
712 | Expression_ptr e = script_exp_binary_rshift(s, $3); | |
713 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
714 | } | |
10600224 | 715 | | string ANDEQ parse_exp |
e5756efb ILT |
716 | { |
717 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
718 | Expression_ptr e = script_exp_binary_bitwise_and(s, $3); | |
719 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
720 | } | |
10600224 | 721 | | string OREQ parse_exp |
e5756efb ILT |
722 | { |
723 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
724 | Expression_ptr e = script_exp_binary_bitwise_or(s, $3); | |
725 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
726 | } | |
10600224 | 727 | | PROVIDE '(' string '=' parse_exp ')' |
e5756efb | 728 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 0); } |
10600224 | 729 | | PROVIDE_HIDDEN '(' string '=' parse_exp ')' |
e5756efb ILT |
730 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 1); } |
731 | ; | |
732 | ||
733 | /* Parse an expression, putting the lexer into the right mode. */ | |
734 | parse_exp: | |
735 | { script_push_lex_into_expression_mode(closure); } | |
736 | exp | |
737 | { | |
738 | script_pop_lex_mode(closure); | |
739 | $$ = $2; | |
740 | } | |
741 | ; | |
742 | ||
743 | /* An expression. */ | |
744 | exp: | |
745 | '(' exp ')' | |
746 | { $$ = $2; } | |
747 | | '-' exp %prec UNARY | |
748 | { $$ = script_exp_unary_minus($2); } | |
749 | | '!' exp %prec UNARY | |
750 | { $$ = script_exp_unary_logical_not($2); } | |
751 | | '~' exp %prec UNARY | |
752 | { $$ = script_exp_unary_bitwise_not($2); } | |
753 | | '+' exp %prec UNARY | |
754 | { $$ = $2; } | |
755 | | exp '*' exp | |
756 | { $$ = script_exp_binary_mult($1, $3); } | |
757 | | exp '/' exp | |
758 | { $$ = script_exp_binary_div($1, $3); } | |
759 | | exp '%' exp | |
760 | { $$ = script_exp_binary_mod($1, $3); } | |
761 | | exp '+' exp | |
762 | { $$ = script_exp_binary_add($1, $3); } | |
763 | | exp '-' exp | |
764 | { $$ = script_exp_binary_sub($1, $3); } | |
765 | | exp LSHIFT exp | |
766 | { $$ = script_exp_binary_lshift($1, $3); } | |
767 | | exp RSHIFT exp | |
768 | { $$ = script_exp_binary_rshift($1, $3); } | |
769 | | exp EQ exp | |
770 | { $$ = script_exp_binary_eq($1, $3); } | |
771 | | exp NE exp | |
772 | { $$ = script_exp_binary_ne($1, $3); } | |
773 | | exp LE exp | |
774 | { $$ = script_exp_binary_le($1, $3); } | |
775 | | exp GE exp | |
776 | { $$ = script_exp_binary_ge($1, $3); } | |
777 | | exp '<' exp | |
778 | { $$ = script_exp_binary_lt($1, $3); } | |
779 | | exp '>' exp | |
780 | { $$ = script_exp_binary_gt($1, $3); } | |
781 | | exp '&' exp | |
782 | { $$ = script_exp_binary_bitwise_and($1, $3); } | |
783 | | exp '^' exp | |
784 | { $$ = script_exp_binary_bitwise_xor($1, $3); } | |
785 | | exp '|' exp | |
786 | { $$ = script_exp_binary_bitwise_or($1, $3); } | |
787 | | exp ANDAND exp | |
788 | { $$ = script_exp_binary_logical_and($1, $3); } | |
789 | | exp OROR exp | |
790 | { $$ = script_exp_binary_logical_or($1, $3); } | |
791 | | exp '?' exp ':' exp | |
792 | { $$ = script_exp_trinary_cond($1, $3, $5); } | |
793 | | INTEGER | |
794 | { $$ = script_exp_integer($1); } | |
e4967d85 | 795 | | string |
10600224 | 796 | { $$ = script_exp_string($1.value, $1.length); } |
e5756efb ILT |
797 | | MAX_K '(' exp ',' exp ')' |
798 | { $$ = script_exp_function_max($3, $5); } | |
799 | | MIN_K '(' exp ',' exp ')' | |
800 | { $$ = script_exp_function_min($3, $5); } | |
10600224 | 801 | | DEFINED '(' string ')' |
e5756efb ILT |
802 | { $$ = script_exp_function_defined($3.value, $3.length); } |
803 | | SIZEOF_HEADERS | |
804 | { $$ = script_exp_function_sizeof_headers(); } | |
10600224 | 805 | | ALIGNOF '(' string ')' |
e5756efb | 806 | { $$ = script_exp_function_alignof($3.value, $3.length); } |
10600224 | 807 | | SIZEOF '(' string ')' |
e5756efb | 808 | { $$ = script_exp_function_sizeof($3.value, $3.length); } |
10600224 | 809 | | ADDR '(' string ')' |
e5756efb | 810 | { $$ = script_exp_function_addr($3.value, $3.length); } |
10600224 | 811 | | LOADADDR '(' string ')' |
e5756efb | 812 | { $$ = script_exp_function_loadaddr($3.value, $3.length); } |
10600224 | 813 | | ORIGIN '(' string ')' |
e5756efb | 814 | { $$ = script_exp_function_origin($3.value, $3.length); } |
10600224 | 815 | | LENGTH '(' string ')' |
e5756efb | 816 | { $$ = script_exp_function_length($3.value, $3.length); } |
10600224 | 817 | | CONSTANT '(' string ')' |
e5756efb ILT |
818 | { $$ = script_exp_function_constant($3.value, $3.length); } |
819 | | ABSOLUTE '(' exp ')' | |
820 | { $$ = script_exp_function_absolute($3); } | |
821 | | ALIGN_K '(' exp ')' | |
822 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
823 | | ALIGN_K '(' exp ',' exp ')' | |
824 | { $$ = script_exp_function_align($3, $5); } | |
825 | | BLOCK '(' exp ')' | |
826 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
827 | | DATA_SEGMENT_ALIGN '(' exp ',' exp ')' | |
2d924fd9 ILT |
828 | { |
829 | script_data_segment_align(closure); | |
830 | $$ = script_exp_function_data_segment_align($3, $5); | |
831 | } | |
e5756efb | 832 | | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')' |
2d924fd9 ILT |
833 | { |
834 | script_data_segment_relro_end(closure); | |
835 | $$ = script_exp_function_data_segment_relro_end($3, $5); | |
836 | } | |
e5756efb ILT |
837 | | DATA_SEGMENT_END '(' exp ')' |
838 | { $$ = script_exp_function_data_segment_end($3); } | |
10600224 | 839 | | SEGMENT_START '(' string ',' exp ')' |
e5756efb ILT |
840 | { |
841 | $$ = script_exp_function_segment_start($3.value, $3.length, $5); | |
842 | } | |
10600224 | 843 | | ASSERT_K '(' exp ',' string ')' |
e5756efb ILT |
844 | { $$ = script_exp_function_assert($3, $5.value, $5.length); } |
845 | ; | |
846 | ||
847 | /* Handle the --defsym option. */ | |
848 | defsym_expr: | |
10600224 | 849 | string '=' parse_exp |
e5756efb ILT |
850 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
851 | ; | |
852 | ||
c82fbeee CS |
853 | /* Handle the --dynamic-list option. A dynamic list has the format |
854 | { sym1; sym2; extern "C++" { namespace::sym3 }; }; | |
855 | We store the symbol we see in the "local" list; that is where | |
856 | Command_line::in_dynamic_list() will look to do its check. | |
857 | TODO(csilvers): More than one of these brace-lists can appear, and | |
858 | should just be merged and treated as a single list. */ | |
859 | dynamic_list_expr: dynamic_list_nodes ; | |
860 | ||
861 | dynamic_list_nodes: | |
862 | dynamic_list_node | |
863 | | dynamic_list_nodes dynamic_list_node | |
864 | ; | |
865 | ||
866 | dynamic_list_node: | |
867 | '{' vers_defns ';' '}' ';' | |
868 | { script_new_vers_node (closure, NULL, $2); } | |
869 | ; | |
870 | ||
09124467 | 871 | /* A version script. */ |
e5756efb | 872 | version_script: |
09124467 ILT |
873 | vers_nodes |
874 | ; | |
875 | ||
876 | vers_nodes: | |
877 | vers_node | |
878 | | vers_nodes vers_node | |
879 | ; | |
880 | ||
881 | vers_node: | |
882 | '{' vers_tag '}' ';' | |
883 | { | |
884 | script_register_vers_node (closure, NULL, 0, $2, NULL); | |
885 | } | |
10600224 | 886 | | string '{' vers_tag '}' ';' |
09124467 ILT |
887 | { |
888 | script_register_vers_node (closure, $1.value, $1.length, $3, | |
889 | NULL); | |
890 | } | |
10600224 | 891 | | string '{' vers_tag '}' verdep ';' |
09124467 ILT |
892 | { |
893 | script_register_vers_node (closure, $1.value, $1.length, $3, $5); | |
894 | } | |
895 | ; | |
896 | ||
897 | verdep: | |
10600224 | 898 | string |
09124467 ILT |
899 | { |
900 | $$ = script_add_vers_depend (closure, NULL, $1.value, $1.length); | |
901 | } | |
10600224 | 902 | | verdep string |
09124467 ILT |
903 | { |
904 | $$ = script_add_vers_depend (closure, $1, $2.value, $2.length); | |
905 | } | |
906 | ; | |
907 | ||
908 | vers_tag: | |
909 | /* empty */ | |
910 | { $$ = script_new_vers_node (closure, NULL, NULL); } | |
911 | | vers_defns ';' | |
912 | { $$ = script_new_vers_node (closure, $1, NULL); } | |
913 | | GLOBAL ':' vers_defns ';' | |
914 | { $$ = script_new_vers_node (closure, $3, NULL); } | |
915 | | LOCAL ':' vers_defns ';' | |
916 | { $$ = script_new_vers_node (closure, NULL, $3); } | |
917 | | GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';' | |
918 | { $$ = script_new_vers_node (closure, $3, $7); } | |
919 | ; | |
920 | ||
10600224 ILT |
921 | /* Here is one of the rare places we care about the distinction |
922 | between STRING and QUOTED_STRING. For QUOTED_STRING, we do exact | |
923 | matching on the pattern, so we pass in true for the exact_match | |
924 | parameter. For STRING, we do glob matching and pass in false. */ | |
09124467 ILT |
925 | vers_defns: |
926 | STRING | |
927 | { | |
928 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
10600224 ILT |
929 | $1.length, 0); |
930 | } | |
931 | | QUOTED_STRING | |
932 | { | |
933 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
934 | $1.length, 1); | |
09124467 ILT |
935 | } |
936 | | vers_defns ';' STRING | |
937 | { | |
10600224 ILT |
938 | $$ = script_new_vers_pattern (closure, $1, $3.value, |
939 | $3.length, 0); | |
940 | } | |
941 | | vers_defns ';' QUOTED_STRING | |
942 | { | |
943 | $$ = script_new_vers_pattern (closure, $1, $3.value, | |
944 | $3.length, 1); | |
09124467 | 945 | } |
10600224 ILT |
946 | | /* Push string on the language stack. */ |
947 | EXTERN string '{' | |
948 | { version_script_push_lang (closure, $2.value, $2.length); } | |
09124467 ILT |
949 | vers_defns opt_semicolon '}' |
950 | { | |
951 | $$ = $5; | |
952 | version_script_pop_lang(closure); | |
953 | } | |
10600224 ILT |
954 | | /* Push string on the language stack. This is more complicated |
955 | than the other cases because we need to merge the linked-list | |
956 | state from the pre-EXTERN defns and the post-EXTERN defns. */ | |
957 | vers_defns ';' EXTERN string '{' | |
958 | { version_script_push_lang (closure, $4.value, $4.length); } | |
959 | vers_defns opt_semicolon '}' | |
960 | { | |
961 | $$ = script_merge_expressions ($1, $7); | |
962 | version_script_pop_lang(closure); | |
963 | } | |
09124467 ILT |
964 | | EXTERN // "extern" as a symbol name |
965 | { | |
966 | $$ = script_new_vers_pattern (closure, NULL, "extern", | |
10600224 | 967 | sizeof("extern") - 1, 1); |
09124467 ILT |
968 | } |
969 | | vers_defns ';' EXTERN | |
970 | { | |
971 | $$ = script_new_vers_pattern (closure, $1, "extern", | |
10600224 | 972 | sizeof("extern") - 1, 1); |
09124467 | 973 | } |
e5756efb ILT |
974 | ; |
975 | ||
10600224 ILT |
976 | /* A string can be either a STRING or a QUOTED_STRING. Almost all the |
977 | time we don't care, and we use this rule. */ | |
978 | string: | |
979 | STRING | |
980 | { $$ = $1; } | |
981 | | QUOTED_STRING | |
982 | { $$ = $1; } | |
983 | ; | |
984 | ||
e5756efb ILT |
985 | /* Some statements require a terminator, which may be a semicolon or a |
986 | comma. */ | |
987 | end: | |
988 | ';' | |
989 | | ',' | |
d391083d ILT |
990 | ; |
991 | ||
09124467 ILT |
992 | /* An optional semicolon. */ |
993 | opt_semicolon: | |
994 | ';' | |
995 | | /* empty */ | |
996 | ; | |
997 | ||
d391083d | 998 | /* An optional comma. */ |
dbe717ef ILT |
999 | opt_comma: |
1000 | ',' | |
1001 | | /* empty */ | |
1002 | ; | |
1003 | ||
1004 | %% |