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bd52eafb | 1 | /* yyscript.y -- linker script grammar for gold. */ |
dbe717ef | 2 | |
6f2750fe | 3 | /* Copyright (C) 2006-2016 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; | |
1e5d2fb1 | 80 | enum Script_section_type section_type; |
dbe717ef ILT |
81 | } |
82 | ||
83 | /* Operators, including a precedence table for expressions. */ | |
84 | ||
85 | %right PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ | |
86 | %right '?' ':' | |
87 | %left OROR | |
88 | %left ANDAND | |
89 | %left '|' | |
90 | %left '^' | |
91 | %left '&' | |
92 | %left EQ NE | |
93 | %left '<' '>' LE GE | |
94 | %left LSHIFT RSHIFT | |
95 | %left '+' '-' | |
96 | %left '*' '/' '%' | |
97 | ||
e5756efb ILT |
98 | /* A fake operator used to indicate unary operator precedence. */ |
99 | %right UNARY | |
100 | ||
dbe717ef ILT |
101 | /* Constants. */ |
102 | ||
103 | %token <string> STRING | |
10600224 | 104 | %token <string> QUOTED_STRING |
dbe717ef ILT |
105 | %token <integer> INTEGER |
106 | ||
107 | /* Keywords. This list is taken from ldgram.y and ldlex.l in the old | |
108 | GNU linker, with the keywords which only appear in MRI mode | |
109 | removed. Not all these keywords are actually used in this grammar. | |
110 | In most cases the keyword is recognized as the token name in upper | |
111 | case. The comments indicate where this is not the case. */ | |
112 | ||
113 | %token ABSOLUTE | |
114 | %token ADDR | |
115 | %token ALIGN_K /* ALIGN */ | |
e5756efb | 116 | %token ALIGNOF |
dbe717ef ILT |
117 | %token ASSERT_K /* ASSERT */ |
118 | %token AS_NEEDED | |
119 | %token AT | |
120 | %token BIND | |
121 | %token BLOCK | |
122 | %token BYTE | |
123 | %token CONSTANT | |
124 | %token CONSTRUCTORS | |
1e5d2fb1 | 125 | %token COPY |
dbe717ef ILT |
126 | %token CREATE_OBJECT_SYMBOLS |
127 | %token DATA_SEGMENT_ALIGN | |
128 | %token DATA_SEGMENT_END | |
129 | %token DATA_SEGMENT_RELRO_END | |
130 | %token DEFINED | |
1e5d2fb1 | 131 | %token DSECT |
dbe717ef ILT |
132 | %token ENTRY |
133 | %token EXCLUDE_FILE | |
134 | %token EXTERN | |
135 | %token FILL | |
136 | %token FLOAT | |
137 | %token FORCE_COMMON_ALLOCATION | |
138 | %token GLOBAL /* global */ | |
139 | %token GROUP | |
140 | %token HLL | |
141 | %token INCLUDE | |
dbe717ef | 142 | %token INHIBIT_COMMON_ALLOCATION |
1e5d2fb1 | 143 | %token INFO |
dbe717ef ILT |
144 | %token INPUT |
145 | %token KEEP | |
7f8cd844 | 146 | %token LEN |
dbe717ef ILT |
147 | %token LENGTH /* LENGTH, l, len */ |
148 | %token LOADADDR | |
149 | %token LOCAL /* local */ | |
150 | %token LONG | |
151 | %token MAP | |
152 | %token MAX_K /* MAX */ | |
153 | %token MEMORY | |
154 | %token MIN_K /* MIN */ | |
155 | %token NEXT | |
156 | %token NOCROSSREFS | |
157 | %token NOFLOAT | |
1e5d2fb1 | 158 | %token NOLOAD |
dbe717ef ILT |
159 | %token ONLY_IF_RO |
160 | %token ONLY_IF_RW | |
7f8cd844 | 161 | %token ORG |
dbe717ef ILT |
162 | %token ORIGIN /* ORIGIN, o, org */ |
163 | %token OUTPUT | |
164 | %token OUTPUT_ARCH | |
165 | %token OUTPUT_FORMAT | |
166 | %token OVERLAY | |
167 | %token PHDRS | |
168 | %token PROVIDE | |
169 | %token PROVIDE_HIDDEN | |
170 | %token QUAD | |
171 | %token SEARCH_DIR | |
172 | %token SECTIONS | |
173 | %token SEGMENT_START | |
174 | %token SHORT | |
175 | %token SIZEOF | |
176 | %token SIZEOF_HEADERS /* SIZEOF_HEADERS, sizeof_headers */ | |
177 | %token SORT_BY_ALIGNMENT | |
f224a3c5 | 178 | %token SORT_BY_INIT_PRIORITY |
dbe717ef ILT |
179 | %token SORT_BY_NAME |
180 | %token SPECIAL | |
181 | %token SQUAD | |
182 | %token STARTUP | |
183 | %token SUBALIGN | |
184 | %token SYSLIB | |
185 | %token TARGET_K /* TARGET */ | |
186 | %token TRUNCATE | |
187 | %token VERSIONK /* VERSION */ | |
188 | ||
195e7dc6 ILT |
189 | /* Keywords, part 2. These are keywords that are unique to gold, |
190 | and not present in the old GNU linker. As before, unless the | |
191 | comments say otherwise, the keyword is recognized as the token | |
192 | name in upper case. */ | |
193 | ||
194 | %token OPTION | |
195 | ||
e5756efb ILT |
196 | /* Special tokens used to tell the grammar what type of tokens we are |
197 | parsing. The token stream always begins with one of these tokens. | |
198 | We do this because version scripts can appear embedded within | |
199 | linker scripts, and because --defsym uses the expression | |
200 | parser. */ | |
201 | %token PARSING_LINKER_SCRIPT | |
202 | %token PARSING_VERSION_SCRIPT | |
203 | %token PARSING_DEFSYM | |
c82fbeee | 204 | %token PARSING_DYNAMIC_LIST |
410da591 CC |
205 | %token PARSING_SECTIONS_BLOCK |
206 | %token PARSING_SECTION_COMMANDS | |
207 | %token PARSING_MEMORY_DEF | |
e5756efb ILT |
208 | |
209 | /* Non-terminal types, where needed. */ | |
210 | ||
1e5d2fb1 | 211 | %type <expr> parse_exp exp |
494e05f4 | 212 | %type <expr> opt_at opt_align opt_subalign opt_fill |
1e5d2fb1 DK |
213 | %type <output_section_header> section_header opt_address_and_section_type |
214 | %type <section_type> section_type | |
494e05f4 | 215 | %type <output_section_trailer> section_trailer |
3802b2dd | 216 | %type <constraint> opt_constraint |
1c4f3631 | 217 | %type <string_list> opt_phdr |
494e05f4 ILT |
218 | %type <integer> data_length |
219 | %type <input_section_spec> input_section_no_keep | |
220 | %type <wildcard_sections> wildcard_sections | |
221 | %type <wildcard_section> wildcard_file wildcard_section | |
222 | %type <string_list> exclude_names | |
223 | %type <string> wildcard_name | |
7f8cd844 | 224 | %type <integer> phdr_type memory_attr |
1c4f3631 | 225 | %type <phdr_info> phdr_info |
09124467 ILT |
226 | %type <versyms> vers_defns |
227 | %type <versnode> vers_tag | |
228 | %type <deplist> verdep | |
10600224 | 229 | %type <string> string |
e5756efb | 230 | |
dbe717ef ILT |
231 | %% |
232 | ||
e5756efb ILT |
233 | /* Read the special token to see what to read next. */ |
234 | top: | |
235 | PARSING_LINKER_SCRIPT linker_script | |
236 | | PARSING_VERSION_SCRIPT version_script | |
237 | | PARSING_DEFSYM defsym_expr | |
c82fbeee | 238 | | PARSING_DYNAMIC_LIST dynamic_list_expr |
410da591 CC |
239 | | PARSING_SECTIONS_BLOCK sections_block |
240 | | PARSING_SECTION_COMMANDS section_cmds | |
241 | | PARSING_MEMORY_DEF memory_defs | |
e5756efb ILT |
242 | ; |
243 | ||
d391083d | 244 | /* A file contains a list of commands. */ |
e5756efb ILT |
245 | linker_script: |
246 | linker_script file_cmd | |
dbe717ef ILT |
247 | | /* empty */ |
248 | ; | |
249 | ||
d391083d | 250 | /* A command which may appear at top level of a linker script. */ |
dbe717ef | 251 | file_cmd: |
afc06bb8 ILT |
252 | EXTERN '(' extern_name_list ')' |
253 | | FORCE_COMMON_ALLOCATION | |
0dfbdef4 ILT |
254 | { script_set_common_allocation(closure, 1); } |
255 | | GROUP | |
dbe717ef ILT |
256 | { script_start_group(closure); } |
257 | '(' input_list ')' | |
258 | { script_end_group(closure); } | |
0dfbdef4 ILT |
259 | | INHIBIT_COMMON_ALLOCATION |
260 | { script_set_common_allocation(closure, 0); } | |
fbc558e1 | 261 | | INPUT '(' input_list ')' |
7f8cd844 | 262 | | MEMORY '{' memory_defs '}' |
10600224 | 263 | | OPTION '(' string ')' |
e5756efb | 264 | { script_parse_option(closure, $3.value, $3.length); } |
15f8229b ILT |
265 | | OUTPUT_FORMAT '(' string ')' |
266 | { | |
267 | if (!script_check_output_format(closure, $3.value, $3.length, | |
268 | NULL, 0, NULL, 0)) | |
269 | YYABORT; | |
270 | } | |
271 | | OUTPUT_FORMAT '(' string ',' string ',' string ')' | |
272 | { | |
273 | if (!script_check_output_format(closure, $3.value, $3.length, | |
274 | $5.value, $5.length, | |
275 | $7.value, $7.length)) | |
276 | YYABORT; | |
277 | } | |
1c4f3631 | 278 | | PHDRS '{' phdrs_defs '}' |
3802b2dd ILT |
279 | | SEARCH_DIR '(' string ')' |
280 | { script_add_search_dir(closure, $3.value, $3.length); } | |
494e05f4 ILT |
281 | | SECTIONS '{' |
282 | { script_start_sections(closure); } | |
283 | sections_block '}' | |
284 | { script_finish_sections(closure); } | |
e6a307ba ILT |
285 | | TARGET_K '(' string ')' |
286 | { script_set_target(closure, $3.value, $3.length); } | |
09124467 ILT |
287 | | VERSIONK '{' |
288 | { script_push_lex_into_version_mode(closure); } | |
289 | version_script '}' | |
290 | { script_pop_lex_mode(closure); } | |
410da591 CC |
291 | | ENTRY '(' string ')' |
292 | { script_set_entry(closure, $3.value, $3.length); } | |
293 | | assignment end | |
294 | | ASSERT_K '(' parse_exp ',' string ')' | |
295 | { script_add_assertion(closure, $3, $5.value, $5.length); } | |
296 | | INCLUDE string | |
297 | { script_include_directive(PARSING_LINKER_SCRIPT, closure, | |
298 | $2.value, $2.length); } | |
2dd3e587 | 299 | | ignore_cmd |
3802b2dd | 300 | | ';' |
2dd3e587 ILT |
301 | ; |
302 | ||
303 | /* Top level commands which we ignore. The GNU linker uses these to | |
304 | select the output format, but we don't offer a choice. Ignoring | |
305 | these is more-or-less OK since most scripts simply explicitly | |
306 | choose the default. */ | |
307 | ignore_cmd: | |
15f8229b | 308 | OUTPUT_ARCH '(' string ')' |
dbe717ef ILT |
309 | ; |
310 | ||
afc06bb8 ILT |
311 | /* A list of external undefined symbols. We put the lexer into |
312 | expression mode so that commas separate names; this is what the GNU | |
313 | linker does. */ | |
314 | ||
315 | extern_name_list: | |
316 | { script_push_lex_into_expression_mode(closure); } | |
317 | extern_name_list_body | |
318 | { script_pop_lex_mode(closure); } | |
319 | ; | |
320 | ||
321 | extern_name_list_body: | |
322 | string | |
323 | { script_add_extern(closure, $1.value, $1.length); } | |
324 | | extern_name_list_body string | |
325 | { script_add_extern(closure, $2.value, $2.length); } | |
326 | | extern_name_list_body ',' string | |
327 | { script_add_extern(closure, $3.value, $3.length); } | |
328 | ; | |
329 | ||
d391083d | 330 | /* A list of input file names. */ |
dbe717ef ILT |
331 | input_list: |
332 | input_list_element | |
333 | | input_list opt_comma input_list_element | |
334 | ; | |
335 | ||
d391083d | 336 | /* An input file name. */ |
dbe717ef | 337 | input_list_element: |
10600224 | 338 | string |
e5756efb | 339 | { script_add_file(closure, $1.value, $1.length); } |
e1df38aa NC |
340 | | '-' STRING |
341 | { script_add_library(closure, $2.value, $2.length); } | |
dbe717ef ILT |
342 | | AS_NEEDED |
343 | { script_start_as_needed(closure); } | |
344 | '(' input_list ')' | |
345 | { script_end_as_needed(closure); } | |
346 | ; | |
347 | ||
494e05f4 ILT |
348 | /* Commands in a SECTIONS block. */ |
349 | sections_block: | |
350 | sections_block section_block_cmd | |
351 | | /* empty */ | |
352 | ; | |
353 | ||
354 | /* A command which may appear within a SECTIONS block. */ | |
355 | section_block_cmd: | |
410da591 CC |
356 | ENTRY '(' string ')' |
357 | { script_set_entry(closure, $3.value, $3.length); } | |
358 | | assignment end | |
359 | | ASSERT_K '(' parse_exp ',' string ')' | |
360 | { script_add_assertion(closure, $3, $5.value, $5.length); } | |
361 | | INCLUDE string | |
362 | { script_include_directive(PARSING_SECTIONS_BLOCK, closure, | |
363 | $2.value, $2.length); } | |
e4967d85 | 364 | | string section_header |
494e05f4 ILT |
365 | { script_start_output_section(closure, $1.value, $1.length, &$2); } |
366 | '{' section_cmds '}' section_trailer | |
367 | { script_finish_output_section(closure, &$7); } | |
368 | ; | |
369 | ||
370 | /* The header of an output section in a SECTIONS block--everything | |
371 | after the name. */ | |
372 | section_header: | |
373 | { script_push_lex_into_expression_mode(closure); } | |
374 | opt_address_and_section_type opt_at opt_align opt_subalign | |
3802b2dd ILT |
375 | { script_pop_lex_mode(closure); } |
376 | opt_constraint | |
494e05f4 | 377 | { |
1e5d2fb1 DK |
378 | $$.address = $2.address; |
379 | $$.section_type = $2.section_type; | |
494e05f4 ILT |
380 | $$.load_address = $3; |
381 | $$.align = $4; | |
382 | $$.subalign = $5; | |
3802b2dd | 383 | $$.constraint = $7; |
494e05f4 ILT |
384 | } |
385 | ; | |
386 | ||
387 | /* The optional address followed by the optional section type. This | |
388 | is a separate nonterminal to avoid a shift/reduce conflict on | |
389 | '(' in section_header. */ | |
390 | ||
391 | opt_address_and_section_type: | |
1e5d2fb1 DK |
392 | ':' |
393 | { | |
394 | $$.address = NULL; | |
395 | $$.section_type = SCRIPT_SECTION_TYPE_NONE; | |
396 | } | |
494e05f4 | 397 | | '(' ')' ':' |
1e5d2fb1 DK |
398 | { |
399 | $$.address = NULL; | |
400 | $$.section_type = SCRIPT_SECTION_TYPE_NONE; | |
401 | } | |
494e05f4 | 402 | | exp ':' |
1e5d2fb1 DK |
403 | { |
404 | $$.address = $1; | |
405 | $$.section_type = SCRIPT_SECTION_TYPE_NONE; | |
406 | } | |
494e05f4 | 407 | | exp '(' ')' ':' |
494e05f4 | 408 | { |
1e5d2fb1 DK |
409 | $$.address = $1; |
410 | $$.section_type = SCRIPT_SECTION_TYPE_NONE; | |
411 | } | |
412 | | '(' section_type ')' ':' | |
413 | { | |
414 | $$.address = NULL; | |
415 | $$.section_type = $2; | |
416 | } | |
417 | | exp '(' section_type ')' ':' | |
418 | { | |
419 | $$.address = $1; | |
420 | $$.section_type = $3; | |
421 | } | |
422 | ; | |
423 | ||
424 | /* We only support NOLOAD. */ | |
425 | section_type: | |
426 | NOLOAD | |
427 | { $$ = SCRIPT_SECTION_TYPE_NOLOAD; } | |
428 | | DSECT | |
429 | { | |
430 | yyerror(closure, "DSECT section type is unsupported"); | |
431 | $$ = SCRIPT_SECTION_TYPE_DSECT; | |
432 | } | |
433 | | COPY | |
434 | { | |
435 | yyerror(closure, "COPY section type is unsupported"); | |
436 | $$ = SCRIPT_SECTION_TYPE_COPY; | |
437 | } | |
438 | | INFO | |
439 | { | |
440 | yyerror(closure, "INFO section type is unsupported"); | |
441 | $$ = SCRIPT_SECTION_TYPE_INFO; | |
442 | } | |
443 | | OVERLAY | |
444 | { | |
445 | yyerror(closure, "OVERLAY section type is unsupported"); | |
446 | $$ = SCRIPT_SECTION_TYPE_OVERLAY; | |
494e05f4 ILT |
447 | } |
448 | ; | |
449 | ||
450 | /* The address at which an output section should be loaded. */ | |
451 | opt_at: | |
452 | /* empty */ | |
453 | { $$ = NULL; } | |
454 | | AT '(' exp ')' | |
455 | { $$ = $3; } | |
456 | ; | |
457 | ||
458 | /* The alignment of an output section. */ | |
459 | opt_align: | |
460 | /* empty */ | |
461 | { $$ = NULL; } | |
462 | | ALIGN_K '(' exp ')' | |
463 | { $$ = $3; } | |
464 | ; | |
465 | ||
466 | /* The input section alignment within an output section. */ | |
467 | opt_subalign: | |
468 | /* empty */ | |
469 | { $$ = NULL; } | |
470 | | SUBALIGN '(' exp ')' | |
471 | { $$ = $3; } | |
472 | ; | |
473 | ||
3802b2dd ILT |
474 | /* A section constraint. */ |
475 | opt_constraint: | |
476 | /* empty */ | |
477 | { $$ = CONSTRAINT_NONE; } | |
478 | | ONLY_IF_RO | |
479 | { $$ = CONSTRAINT_ONLY_IF_RO; } | |
480 | | ONLY_IF_RW | |
481 | { $$ = CONSTRAINT_ONLY_IF_RW; } | |
482 | | SPECIAL | |
483 | { $$ = CONSTRAINT_SPECIAL; } | |
484 | ; | |
485 | ||
494e05f4 ILT |
486 | /* The trailer of an output section in a SECTIONS block. */ |
487 | section_trailer: | |
494e05f4 ILT |
488 | opt_memspec opt_at_memspec opt_phdr opt_fill opt_comma |
489 | { | |
3802b2dd | 490 | $$.fill = $4; |
1c4f3631 | 491 | $$.phdrs = $3; |
494e05f4 ILT |
492 | } |
493 | ; | |
494 | ||
495 | /* A memory specification for an output section. */ | |
496 | opt_memspec: | |
e4967d85 | 497 | '>' string |
7f8cd844 | 498 | { script_set_section_region(closure, $2.value, $2.length, 1); } |
494e05f4 ILT |
499 | | /* empty */ |
500 | ; | |
501 | ||
502 | /* A memory specification for where to load an output section. */ | |
503 | opt_at_memspec: | |
e4967d85 | 504 | AT '>' string |
7f8cd844 | 505 | { script_set_section_region(closure, $3.value, $3.length, 0); } |
494e05f4 ILT |
506 | | /* empty */ |
507 | ; | |
508 | ||
509 | /* The program segment an output section should go into. */ | |
510 | opt_phdr: | |
e4967d85 | 511 | opt_phdr ':' string |
1c4f3631 | 512 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } |
494e05f4 | 513 | | /* empty */ |
1c4f3631 | 514 | { $$ = NULL; } |
494e05f4 ILT |
515 | ; |
516 | ||
a445fddf ILT |
517 | /* The value to use to fill an output section. FIXME: This does not |
518 | handle a string of arbitrary length. */ | |
494e05f4 | 519 | opt_fill: |
3802b2dd | 520 | '=' parse_exp |
494e05f4 ILT |
521 | { $$ = $2; } |
522 | | /* empty */ | |
523 | { $$ = NULL; } | |
524 | ; | |
525 | ||
526 | /* Commands which may appear within the description of an output | |
527 | section in a SECTIONS block. */ | |
528 | section_cmds: | |
529 | /* empty */ | |
530 | | section_cmds section_cmd | |
531 | ; | |
532 | ||
533 | /* A command which may appear within the description of an output | |
534 | section in a SECTIONS block. */ | |
535 | section_cmd: | |
536 | assignment end | |
537 | | input_section_spec | |
538 | | data_length '(' parse_exp ')' | |
539 | { script_add_data(closure, $1, $3); } | |
e4967d85 | 540 | | ASSERT_K '(' parse_exp ',' string ')' |
494e05f4 ILT |
541 | { script_add_assertion(closure, $3, $5.value, $5.length); } |
542 | | FILL '(' parse_exp ')' | |
543 | { script_add_fill(closure, $3); } | |
544 | | CONSTRUCTORS | |
545 | { | |
546 | /* The GNU linker uses CONSTRUCTORS for the a.out object | |
547 | file format. It does nothing when using ELF. Since | |
548 | some ELF linker scripts use it although it does | |
549 | nothing, we accept it and ignore it. */ | |
550 | } | |
3802b2dd | 551 | | SORT_BY_NAME '(' CONSTRUCTORS ')' |
98ef3ea4 | 552 | | INCLUDE string |
410da591 CC |
553 | { script_include_directive(PARSING_SECTION_COMMANDS, closure, |
554 | $2.value, $2.length); } | |
494e05f4 ILT |
555 | | ';' |
556 | ; | |
557 | ||
558 | /* The length of data which may appear within the description of an | |
559 | output section in a SECTIONS block. */ | |
560 | data_length: | |
561 | QUAD | |
562 | { $$ = QUAD; } | |
563 | | SQUAD | |
564 | { $$ = SQUAD; } | |
565 | | LONG | |
566 | { $$ = LONG; } | |
567 | | SHORT | |
568 | { $$ = SHORT; } | |
569 | | BYTE | |
570 | { $$ = BYTE; } | |
571 | ; | |
572 | ||
573 | /* An input section specification. This may appear within the | |
574 | description of an output section in a SECTIONS block. */ | |
575 | input_section_spec: | |
576 | input_section_no_keep | |
577 | { script_add_input_section(closure, &$1, 0); } | |
578 | | KEEP '(' input_section_no_keep ')' | |
579 | { script_add_input_section(closure, &$3, 1); } | |
580 | ; | |
581 | ||
582 | /* An input section specification within a KEEP clause. */ | |
583 | input_section_no_keep: | |
e4967d85 | 584 | string |
494e05f4 ILT |
585 | { |
586 | $$.file.name = $1; | |
587 | $$.file.sort = SORT_WILDCARD_NONE; | |
588 | $$.input_sections.sections = NULL; | |
589 | $$.input_sections.exclude = NULL; | |
590 | } | |
591 | | wildcard_file '(' wildcard_sections ')' | |
592 | { | |
593 | $$.file = $1; | |
594 | $$.input_sections = $3; | |
595 | } | |
596 | ; | |
597 | ||
598 | /* A wildcard file specification. */ | |
599 | wildcard_file: | |
600 | wildcard_name | |
601 | { | |
602 | $$.name = $1; | |
603 | $$.sort = SORT_WILDCARD_NONE; | |
604 | } | |
605 | | SORT_BY_NAME '(' wildcard_name ')' | |
606 | { | |
607 | $$.name = $3; | |
608 | $$.sort = SORT_WILDCARD_BY_NAME; | |
609 | } | |
610 | ; | |
611 | ||
612 | /* A list of wild card section specifications. */ | |
613 | wildcard_sections: | |
614 | wildcard_sections opt_comma wildcard_section | |
615 | { | |
616 | $$.sections = script_string_sort_list_add($1.sections, &$3); | |
617 | $$.exclude = $1.exclude; | |
618 | } | |
619 | | wildcard_section | |
620 | { | |
621 | $$.sections = script_new_string_sort_list(&$1); | |
622 | $$.exclude = NULL; | |
623 | } | |
624 | | wildcard_sections opt_comma EXCLUDE_FILE '(' exclude_names ')' | |
625 | { | |
626 | $$.sections = $1.sections; | |
627 | $$.exclude = script_string_list_append($1.exclude, $5); | |
628 | } | |
629 | | EXCLUDE_FILE '(' exclude_names ')' | |
630 | { | |
631 | $$.sections = NULL; | |
632 | $$.exclude = $3; | |
633 | } | |
634 | ; | |
635 | ||
636 | /* A single wild card specification. */ | |
637 | wildcard_section: | |
638 | wildcard_name | |
639 | { | |
640 | $$.name = $1; | |
641 | $$.sort = SORT_WILDCARD_NONE; | |
642 | } | |
643 | | SORT_BY_NAME '(' wildcard_section ')' | |
644 | { | |
645 | $$.name = $3.name; | |
646 | switch ($3.sort) | |
647 | { | |
648 | case SORT_WILDCARD_NONE: | |
649 | $$.sort = SORT_WILDCARD_BY_NAME; | |
650 | break; | |
651 | case SORT_WILDCARD_BY_NAME: | |
652 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
653 | break; | |
654 | case SORT_WILDCARD_BY_ALIGNMENT: | |
655 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
656 | $$.sort = SORT_WILDCARD_BY_NAME_BY_ALIGNMENT; | |
657 | break; | |
658 | default: | |
659 | abort(); | |
660 | } | |
661 | } | |
662 | | SORT_BY_ALIGNMENT '(' wildcard_section ')' | |
663 | { | |
664 | $$.name = $3.name; | |
665 | switch ($3.sort) | |
666 | { | |
667 | case SORT_WILDCARD_NONE: | |
668 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT; | |
669 | break; | |
670 | case SORT_WILDCARD_BY_ALIGNMENT: | |
671 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
672 | break; | |
673 | case SORT_WILDCARD_BY_NAME: | |
674 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
675 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT_BY_NAME; | |
676 | break; | |
677 | default: | |
678 | abort(); | |
679 | } | |
680 | } | |
f224a3c5 IK |
681 | | SORT_BY_INIT_PRIORITY '(' wildcard_name ')' |
682 | { | |
683 | $$.name = $3; | |
684 | $$.sort = SORT_WILDCARD_BY_INIT_PRIORITY; | |
685 | } | |
494e05f4 ILT |
686 | ; |
687 | ||
688 | /* A list of file names to exclude. */ | |
689 | exclude_names: | |
690 | exclude_names opt_comma wildcard_name | |
691 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } | |
692 | | wildcard_name | |
693 | { $$ = script_new_string_list($1.value, $1.length); } | |
694 | ; | |
695 | ||
696 | /* A single wildcard name. We recognize '*' and '?' specially since | |
697 | they are expression tokens. */ | |
698 | wildcard_name: | |
e4967d85 | 699 | string |
494e05f4 ILT |
700 | { $$ = $1; } |
701 | | '*' | |
702 | { | |
703 | $$.value = "*"; | |
704 | $$.length = 1; | |
705 | } | |
706 | | '?' | |
707 | { | |
708 | $$.value = "?"; | |
709 | $$.length = 1; | |
710 | } | |
711 | ; | |
712 | ||
7f8cd844 NC |
713 | /* A list of MEMORY definitions. */ |
714 | memory_defs: | |
715 | memory_defs opt_comma memory_def | |
716 | | /* empty */ | |
717 | ; | |
718 | ||
719 | /* A single MEMORY definition. */ | |
720 | memory_def: | |
721 | string memory_attr ':' memory_origin '=' parse_exp opt_comma memory_length '=' parse_exp | |
722 | { script_add_memory(closure, $1.value, $1.length, $2, $6, $10); } | |
723 | | | |
7f8cd844 | 724 | INCLUDE string |
410da591 CC |
725 | { script_include_directive(PARSING_MEMORY_DEF, closure, |
726 | $2.value, $2.length); } | |
7f8cd844 NC |
727 | | |
728 | ; | |
729 | ||
730 | /* The (optional) attributes of a MEMORY region. */ | |
731 | memory_attr: | |
732 | '(' string ')' | |
733 | { $$ = script_parse_memory_attr(closure, $2.value, $2.length, 0); } | |
734 | | /* Inverted attributes. */ | |
735 | '(' '!' string ')' | |
736 | { $$ = script_parse_memory_attr(closure, $3.value, $3.length, 1); } | |
737 | | /* empty */ | |
738 | { $$ = 0; } | |
739 | ; | |
740 | ||
741 | memory_origin: | |
742 | ORIGIN | |
743 | | | |
744 | ORG | |
745 | | | |
746 | 'o' | |
747 | ; | |
748 | ||
749 | memory_length: | |
750 | LENGTH | |
751 | | | |
752 | LEN | |
753 | | | |
754 | 'l' | |
755 | ; | |
756 | ||
1c4f3631 ILT |
757 | /* A list of program header definitions. */ |
758 | phdrs_defs: | |
759 | phdrs_defs phdr_def | |
760 | | /* empty */ | |
761 | ; | |
762 | ||
763 | /* A program header definition. */ | |
764 | phdr_def: | |
765 | string phdr_type phdr_info ';' | |
766 | { script_add_phdr(closure, $1.value, $1.length, $2, &$3); } | |
767 | ; | |
768 | ||
769 | /* A program header type. The GNU linker accepts a general expression | |
770 | here, but that would be a pain because we would have to dig into | |
771 | the expression structure. It's unlikely that anybody uses anything | |
772 | other than a string or a number here, so that is all we expect. */ | |
773 | phdr_type: | |
774 | string | |
775 | { $$ = script_phdr_string_to_type(closure, $1.value, $1.length); } | |
776 | | INTEGER | |
777 | { $$ = $1; } | |
778 | ; | |
779 | ||
780 | /* Additional information for a program header. */ | |
781 | phdr_info: | |
782 | /* empty */ | |
783 | { memset(&$$, 0, sizeof(struct Phdr_info)); } | |
784 | | string phdr_info | |
785 | { | |
786 | $$ = $2; | |
787 | if ($1.length == 7 && strncmp($1.value, "FILEHDR", 7) == 0) | |
788 | $$.includes_filehdr = 1; | |
789 | else | |
790 | yyerror(closure, "PHDRS syntax error"); | |
791 | } | |
792 | | PHDRS phdr_info | |
793 | { | |
794 | $$ = $2; | |
795 | $$.includes_phdrs = 1; | |
796 | } | |
797 | | string '(' INTEGER ')' phdr_info | |
798 | { | |
799 | $$ = $5; | |
800 | if ($1.length == 5 && strncmp($1.value, "FLAGS", 5) == 0) | |
801 | { | |
802 | $$.is_flags_valid = 1; | |
803 | $$.flags = $3; | |
804 | } | |
805 | else | |
806 | yyerror(closure, "PHDRS syntax error"); | |
807 | } | |
808 | | AT '(' parse_exp ')' phdr_info | |
809 | { | |
810 | $$ = $5; | |
811 | $$.load_address = $3; | |
812 | } | |
813 | ; | |
814 | ||
e5756efb ILT |
815 | /* Set a symbol to a value. */ |
816 | assignment: | |
10600224 | 817 | string '=' parse_exp |
e5756efb | 818 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
10600224 | 819 | | string PLUSEQ parse_exp |
e5756efb ILT |
820 | { |
821 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
822 | Expression_ptr e = script_exp_binary_add(s, $3); | |
823 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
824 | } | |
10600224 | 825 | | string MINUSEQ parse_exp |
e5756efb ILT |
826 | { |
827 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
828 | Expression_ptr e = script_exp_binary_sub(s, $3); | |
829 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
830 | } | |
10600224 | 831 | | string MULTEQ parse_exp |
e5756efb ILT |
832 | { |
833 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
834 | Expression_ptr e = script_exp_binary_mult(s, $3); | |
835 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
836 | } | |
10600224 | 837 | | string DIVEQ parse_exp |
e5756efb ILT |
838 | { |
839 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
840 | Expression_ptr e = script_exp_binary_div(s, $3); | |
841 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
842 | } | |
10600224 | 843 | | string LSHIFTEQ parse_exp |
e5756efb ILT |
844 | { |
845 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
846 | Expression_ptr e = script_exp_binary_lshift(s, $3); | |
847 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
848 | } | |
10600224 | 849 | | string RSHIFTEQ parse_exp |
e5756efb ILT |
850 | { |
851 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
852 | Expression_ptr e = script_exp_binary_rshift(s, $3); | |
853 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
854 | } | |
10600224 | 855 | | string ANDEQ parse_exp |
e5756efb ILT |
856 | { |
857 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
858 | Expression_ptr e = script_exp_binary_bitwise_and(s, $3); | |
859 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
860 | } | |
10600224 | 861 | | string OREQ parse_exp |
e5756efb ILT |
862 | { |
863 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
864 | Expression_ptr e = script_exp_binary_bitwise_or(s, $3); | |
865 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
866 | } | |
10600224 | 867 | | PROVIDE '(' string '=' parse_exp ')' |
e5756efb | 868 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 0); } |
10600224 | 869 | | PROVIDE_HIDDEN '(' string '=' parse_exp ')' |
e5756efb ILT |
870 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 1); } |
871 | ; | |
872 | ||
873 | /* Parse an expression, putting the lexer into the right mode. */ | |
874 | parse_exp: | |
875 | { script_push_lex_into_expression_mode(closure); } | |
876 | exp | |
877 | { | |
878 | script_pop_lex_mode(closure); | |
879 | $$ = $2; | |
880 | } | |
881 | ; | |
882 | ||
883 | /* An expression. */ | |
884 | exp: | |
885 | '(' exp ')' | |
886 | { $$ = $2; } | |
887 | | '-' exp %prec UNARY | |
888 | { $$ = script_exp_unary_minus($2); } | |
889 | | '!' exp %prec UNARY | |
890 | { $$ = script_exp_unary_logical_not($2); } | |
891 | | '~' exp %prec UNARY | |
892 | { $$ = script_exp_unary_bitwise_not($2); } | |
893 | | '+' exp %prec UNARY | |
894 | { $$ = $2; } | |
895 | | exp '*' exp | |
896 | { $$ = script_exp_binary_mult($1, $3); } | |
897 | | exp '/' exp | |
898 | { $$ = script_exp_binary_div($1, $3); } | |
899 | | exp '%' exp | |
900 | { $$ = script_exp_binary_mod($1, $3); } | |
901 | | exp '+' exp | |
902 | { $$ = script_exp_binary_add($1, $3); } | |
903 | | exp '-' exp | |
904 | { $$ = script_exp_binary_sub($1, $3); } | |
905 | | exp LSHIFT exp | |
906 | { $$ = script_exp_binary_lshift($1, $3); } | |
907 | | exp RSHIFT exp | |
908 | { $$ = script_exp_binary_rshift($1, $3); } | |
909 | | exp EQ exp | |
910 | { $$ = script_exp_binary_eq($1, $3); } | |
911 | | exp NE exp | |
912 | { $$ = script_exp_binary_ne($1, $3); } | |
913 | | exp LE exp | |
914 | { $$ = script_exp_binary_le($1, $3); } | |
915 | | exp GE exp | |
916 | { $$ = script_exp_binary_ge($1, $3); } | |
917 | | exp '<' exp | |
918 | { $$ = script_exp_binary_lt($1, $3); } | |
919 | | exp '>' exp | |
920 | { $$ = script_exp_binary_gt($1, $3); } | |
921 | | exp '&' exp | |
922 | { $$ = script_exp_binary_bitwise_and($1, $3); } | |
923 | | exp '^' exp | |
924 | { $$ = script_exp_binary_bitwise_xor($1, $3); } | |
925 | | exp '|' exp | |
926 | { $$ = script_exp_binary_bitwise_or($1, $3); } | |
927 | | exp ANDAND exp | |
928 | { $$ = script_exp_binary_logical_and($1, $3); } | |
929 | | exp OROR exp | |
930 | { $$ = script_exp_binary_logical_or($1, $3); } | |
931 | | exp '?' exp ':' exp | |
932 | { $$ = script_exp_trinary_cond($1, $3, $5); } | |
933 | | INTEGER | |
934 | { $$ = script_exp_integer($1); } | |
e4967d85 | 935 | | string |
88a4108b | 936 | { $$ = script_symbol(closure, $1.value, $1.length); } |
e5756efb ILT |
937 | | MAX_K '(' exp ',' exp ')' |
938 | { $$ = script_exp_function_max($3, $5); } | |
939 | | MIN_K '(' exp ',' exp ')' | |
940 | { $$ = script_exp_function_min($3, $5); } | |
10600224 | 941 | | DEFINED '(' string ')' |
e5756efb ILT |
942 | { $$ = script_exp_function_defined($3.value, $3.length); } |
943 | | SIZEOF_HEADERS | |
944 | { $$ = script_exp_function_sizeof_headers(); } | |
10600224 | 945 | | ALIGNOF '(' string ')' |
e5756efb | 946 | { $$ = script_exp_function_alignof($3.value, $3.length); } |
10600224 | 947 | | SIZEOF '(' string ')' |
e5756efb | 948 | { $$ = script_exp_function_sizeof($3.value, $3.length); } |
10600224 | 949 | | ADDR '(' string ')' |
e5756efb | 950 | { $$ = script_exp_function_addr($3.value, $3.length); } |
10600224 | 951 | | LOADADDR '(' string ')' |
e5756efb | 952 | { $$ = script_exp_function_loadaddr($3.value, $3.length); } |
10600224 | 953 | | ORIGIN '(' string ')' |
7f8cd844 | 954 | { $$ = script_exp_function_origin(closure, $3.value, $3.length); } |
10600224 | 955 | | LENGTH '(' string ')' |
7f8cd844 | 956 | { $$ = script_exp_function_length(closure, $3.value, $3.length); } |
10600224 | 957 | | CONSTANT '(' string ')' |
e5756efb ILT |
958 | { $$ = script_exp_function_constant($3.value, $3.length); } |
959 | | ABSOLUTE '(' exp ')' | |
960 | { $$ = script_exp_function_absolute($3); } | |
961 | | ALIGN_K '(' exp ')' | |
962 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
963 | | ALIGN_K '(' exp ',' exp ')' | |
964 | { $$ = script_exp_function_align($3, $5); } | |
965 | | BLOCK '(' exp ')' | |
966 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
967 | | DATA_SEGMENT_ALIGN '(' exp ',' exp ')' | |
2d924fd9 ILT |
968 | { |
969 | script_data_segment_align(closure); | |
970 | $$ = script_exp_function_data_segment_align($3, $5); | |
971 | } | |
e5756efb | 972 | | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')' |
2d924fd9 ILT |
973 | { |
974 | script_data_segment_relro_end(closure); | |
975 | $$ = script_exp_function_data_segment_relro_end($3, $5); | |
976 | } | |
e5756efb ILT |
977 | | DATA_SEGMENT_END '(' exp ')' |
978 | { $$ = script_exp_function_data_segment_end($3); } | |
10600224 | 979 | | SEGMENT_START '(' string ',' exp ')' |
e5756efb ILT |
980 | { |
981 | $$ = script_exp_function_segment_start($3.value, $3.length, $5); | |
3c12dcdb DK |
982 | /* We need to take note of any SEGMENT_START expressions |
983 | because they change the behaviour of -Ttext, -Tdata and | |
984 | -Tbss options. */ | |
985 | script_saw_segment_start_expression(closure); | |
e5756efb | 986 | } |
10600224 | 987 | | ASSERT_K '(' exp ',' string ')' |
e5756efb ILT |
988 | { $$ = script_exp_function_assert($3, $5.value, $5.length); } |
989 | ; | |
990 | ||
991 | /* Handle the --defsym option. */ | |
992 | defsym_expr: | |
10600224 | 993 | string '=' parse_exp |
e5756efb ILT |
994 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
995 | ; | |
996 | ||
c82fbeee CS |
997 | /* Handle the --dynamic-list option. A dynamic list has the format |
998 | { sym1; sym2; extern "C++" { namespace::sym3 }; }; | |
999 | We store the symbol we see in the "local" list; that is where | |
1000 | Command_line::in_dynamic_list() will look to do its check. | |
1001 | TODO(csilvers): More than one of these brace-lists can appear, and | |
1002 | should just be merged and treated as a single list. */ | |
1003 | dynamic_list_expr: dynamic_list_nodes ; | |
1004 | ||
1005 | dynamic_list_nodes: | |
1006 | dynamic_list_node | |
1007 | | dynamic_list_nodes dynamic_list_node | |
1008 | ; | |
1009 | ||
1010 | dynamic_list_node: | |
1011 | '{' vers_defns ';' '}' ';' | |
1012 | { script_new_vers_node (closure, NULL, $2); } | |
1013 | ; | |
1014 | ||
09124467 | 1015 | /* A version script. */ |
e5756efb | 1016 | version_script: |
09124467 ILT |
1017 | vers_nodes |
1018 | ; | |
1019 | ||
1020 | vers_nodes: | |
1021 | vers_node | |
1022 | | vers_nodes vers_node | |
1023 | ; | |
1024 | ||
1025 | vers_node: | |
1026 | '{' vers_tag '}' ';' | |
1027 | { | |
1028 | script_register_vers_node (closure, NULL, 0, $2, NULL); | |
1029 | } | |
10600224 | 1030 | | string '{' vers_tag '}' ';' |
09124467 ILT |
1031 | { |
1032 | script_register_vers_node (closure, $1.value, $1.length, $3, | |
1033 | NULL); | |
1034 | } | |
10600224 | 1035 | | string '{' vers_tag '}' verdep ';' |
09124467 ILT |
1036 | { |
1037 | script_register_vers_node (closure, $1.value, $1.length, $3, $5); | |
1038 | } | |
1039 | ; | |
1040 | ||
1041 | verdep: | |
10600224 | 1042 | string |
09124467 ILT |
1043 | { |
1044 | $$ = script_add_vers_depend (closure, NULL, $1.value, $1.length); | |
1045 | } | |
10600224 | 1046 | | verdep string |
09124467 ILT |
1047 | { |
1048 | $$ = script_add_vers_depend (closure, $1, $2.value, $2.length); | |
1049 | } | |
1050 | ; | |
1051 | ||
1052 | vers_tag: | |
1053 | /* empty */ | |
1054 | { $$ = script_new_vers_node (closure, NULL, NULL); } | |
1055 | | vers_defns ';' | |
1056 | { $$ = script_new_vers_node (closure, $1, NULL); } | |
1057 | | GLOBAL ':' vers_defns ';' | |
1058 | { $$ = script_new_vers_node (closure, $3, NULL); } | |
1059 | | LOCAL ':' vers_defns ';' | |
1060 | { $$ = script_new_vers_node (closure, NULL, $3); } | |
1061 | | GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';' | |
1062 | { $$ = script_new_vers_node (closure, $3, $7); } | |
1063 | ; | |
1064 | ||
10600224 ILT |
1065 | /* Here is one of the rare places we care about the distinction |
1066 | between STRING and QUOTED_STRING. For QUOTED_STRING, we do exact | |
1067 | matching on the pattern, so we pass in true for the exact_match | |
1068 | parameter. For STRING, we do glob matching and pass in false. */ | |
09124467 ILT |
1069 | vers_defns: |
1070 | STRING | |
1071 | { | |
1072 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
10600224 ILT |
1073 | $1.length, 0); |
1074 | } | |
1075 | | QUOTED_STRING | |
1076 | { | |
1077 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
1078 | $1.length, 1); | |
09124467 ILT |
1079 | } |
1080 | | vers_defns ';' STRING | |
1081 | { | |
10600224 ILT |
1082 | $$ = script_new_vers_pattern (closure, $1, $3.value, |
1083 | $3.length, 0); | |
1084 | } | |
1085 | | vers_defns ';' QUOTED_STRING | |
1086 | { | |
1087 | $$ = script_new_vers_pattern (closure, $1, $3.value, | |
1088 | $3.length, 1); | |
09124467 | 1089 | } |
10600224 ILT |
1090 | | /* Push string on the language stack. */ |
1091 | EXTERN string '{' | |
1092 | { version_script_push_lang (closure, $2.value, $2.length); } | |
09124467 ILT |
1093 | vers_defns opt_semicolon '}' |
1094 | { | |
1095 | $$ = $5; | |
1096 | version_script_pop_lang(closure); | |
1097 | } | |
10600224 ILT |
1098 | | /* Push string on the language stack. This is more complicated |
1099 | than the other cases because we need to merge the linked-list | |
1100 | state from the pre-EXTERN defns and the post-EXTERN defns. */ | |
1101 | vers_defns ';' EXTERN string '{' | |
1102 | { version_script_push_lang (closure, $4.value, $4.length); } | |
1103 | vers_defns opt_semicolon '}' | |
1104 | { | |
1105 | $$ = script_merge_expressions ($1, $7); | |
1106 | version_script_pop_lang(closure); | |
1107 | } | |
09124467 ILT |
1108 | | EXTERN // "extern" as a symbol name |
1109 | { | |
1110 | $$ = script_new_vers_pattern (closure, NULL, "extern", | |
10600224 | 1111 | sizeof("extern") - 1, 1); |
09124467 ILT |
1112 | } |
1113 | | vers_defns ';' EXTERN | |
1114 | { | |
1115 | $$ = script_new_vers_pattern (closure, $1, "extern", | |
10600224 | 1116 | sizeof("extern") - 1, 1); |
09124467 | 1117 | } |
e5756efb ILT |
1118 | ; |
1119 | ||
10600224 ILT |
1120 | /* A string can be either a STRING or a QUOTED_STRING. Almost all the |
1121 | time we don't care, and we use this rule. */ | |
1122 | string: | |
1123 | STRING | |
1124 | { $$ = $1; } | |
1125 | | QUOTED_STRING | |
1126 | { $$ = $1; } | |
1127 | ; | |
1128 | ||
e5756efb ILT |
1129 | /* Some statements require a terminator, which may be a semicolon or a |
1130 | comma. */ | |
1131 | end: | |
1132 | ';' | |
1133 | | ',' | |
d391083d ILT |
1134 | ; |
1135 | ||
09124467 ILT |
1136 | /* An optional semicolon. */ |
1137 | opt_semicolon: | |
1138 | ';' | |
1139 | | /* empty */ | |
1140 | ; | |
1141 | ||
d391083d | 1142 | /* An optional comma. */ |
dbe717ef ILT |
1143 | opt_comma: |
1144 | ',' | |
1145 | | /* empty */ | |
1146 | ; | |
1147 | ||
1148 | %% |