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: |
afc06bb8 ILT |
237 | EXTERN '(' extern_name_list ')' |
238 | | FORCE_COMMON_ALLOCATION | |
0dfbdef4 ILT |
239 | { script_set_common_allocation(closure, 1); } |
240 | | GROUP | |
dbe717ef ILT |
241 | { script_start_group(closure); } |
242 | '(' input_list ')' | |
243 | { script_end_group(closure); } | |
0dfbdef4 ILT |
244 | | INHIBIT_COMMON_ALLOCATION |
245 | { script_set_common_allocation(closure, 0); } | |
fbc558e1 | 246 | | INPUT '(' input_list ')' |
10600224 | 247 | | OPTION '(' string ')' |
e5756efb | 248 | { script_parse_option(closure, $3.value, $3.length); } |
15f8229b ILT |
249 | | OUTPUT_FORMAT '(' string ')' |
250 | { | |
251 | if (!script_check_output_format(closure, $3.value, $3.length, | |
252 | NULL, 0, NULL, 0)) | |
253 | YYABORT; | |
254 | } | |
255 | | OUTPUT_FORMAT '(' string ',' string ',' string ')' | |
256 | { | |
257 | if (!script_check_output_format(closure, $3.value, $3.length, | |
258 | $5.value, $5.length, | |
259 | $7.value, $7.length)) | |
260 | YYABORT; | |
261 | } | |
1c4f3631 | 262 | | PHDRS '{' phdrs_defs '}' |
3802b2dd ILT |
263 | | SEARCH_DIR '(' string ')' |
264 | { script_add_search_dir(closure, $3.value, $3.length); } | |
494e05f4 ILT |
265 | | SECTIONS '{' |
266 | { script_start_sections(closure); } | |
267 | sections_block '}' | |
268 | { script_finish_sections(closure); } | |
09124467 ILT |
269 | | VERSIONK '{' |
270 | { script_push_lex_into_version_mode(closure); } | |
271 | version_script '}' | |
272 | { script_pop_lex_mode(closure); } | |
d391083d | 273 | | file_or_sections_cmd |
2dd3e587 | 274 | | ignore_cmd |
3802b2dd | 275 | | ';' |
2dd3e587 ILT |
276 | ; |
277 | ||
278 | /* Top level commands which we ignore. The GNU linker uses these to | |
279 | select the output format, but we don't offer a choice. Ignoring | |
280 | these is more-or-less OK since most scripts simply explicitly | |
281 | choose the default. */ | |
282 | ignore_cmd: | |
15f8229b | 283 | OUTPUT_ARCH '(' string ')' |
dbe717ef ILT |
284 | ; |
285 | ||
afc06bb8 ILT |
286 | /* A list of external undefined symbols. We put the lexer into |
287 | expression mode so that commas separate names; this is what the GNU | |
288 | linker does. */ | |
289 | ||
290 | extern_name_list: | |
291 | { script_push_lex_into_expression_mode(closure); } | |
292 | extern_name_list_body | |
293 | { script_pop_lex_mode(closure); } | |
294 | ; | |
295 | ||
296 | extern_name_list_body: | |
297 | string | |
298 | { script_add_extern(closure, $1.value, $1.length); } | |
299 | | extern_name_list_body string | |
300 | { script_add_extern(closure, $2.value, $2.length); } | |
301 | | extern_name_list_body ',' string | |
302 | { script_add_extern(closure, $3.value, $3.length); } | |
303 | ; | |
304 | ||
d391083d | 305 | /* A list of input file names. */ |
dbe717ef ILT |
306 | input_list: |
307 | input_list_element | |
308 | | input_list opt_comma input_list_element | |
309 | ; | |
310 | ||
d391083d | 311 | /* An input file name. */ |
dbe717ef | 312 | input_list_element: |
10600224 | 313 | string |
e5756efb | 314 | { script_add_file(closure, $1.value, $1.length); } |
dbe717ef ILT |
315 | | AS_NEEDED |
316 | { script_start_as_needed(closure); } | |
317 | '(' input_list ')' | |
318 | { script_end_as_needed(closure); } | |
319 | ; | |
320 | ||
494e05f4 ILT |
321 | /* Commands in a SECTIONS block. */ |
322 | sections_block: | |
323 | sections_block section_block_cmd | |
324 | | /* empty */ | |
325 | ; | |
326 | ||
327 | /* A command which may appear within a SECTIONS block. */ | |
328 | section_block_cmd: | |
329 | file_or_sections_cmd | |
e4967d85 | 330 | | string section_header |
494e05f4 ILT |
331 | { script_start_output_section(closure, $1.value, $1.length, &$2); } |
332 | '{' section_cmds '}' section_trailer | |
333 | { script_finish_output_section(closure, &$7); } | |
334 | ; | |
335 | ||
336 | /* The header of an output section in a SECTIONS block--everything | |
337 | after the name. */ | |
338 | section_header: | |
339 | { script_push_lex_into_expression_mode(closure); } | |
340 | opt_address_and_section_type opt_at opt_align opt_subalign | |
3802b2dd ILT |
341 | { script_pop_lex_mode(closure); } |
342 | opt_constraint | |
494e05f4 ILT |
343 | { |
344 | $$.address = $2; | |
345 | $$.load_address = $3; | |
346 | $$.align = $4; | |
347 | $$.subalign = $5; | |
3802b2dd | 348 | $$.constraint = $7; |
494e05f4 ILT |
349 | } |
350 | ; | |
351 | ||
352 | /* The optional address followed by the optional section type. This | |
353 | is a separate nonterminal to avoid a shift/reduce conflict on | |
354 | '(' in section_header. */ | |
355 | ||
356 | opt_address_and_section_type: | |
357 | ':' | |
358 | { $$ = NULL; } | |
359 | | '(' ')' ':' | |
360 | { $$ = NULL; } | |
361 | | exp ':' | |
362 | { $$ = $1; } | |
363 | | exp '(' ')' ':' | |
364 | { $$ = $1; } | |
e4967d85 | 365 | | exp '(' string ')' ':' |
494e05f4 ILT |
366 | { |
367 | yyerror(closure, "section types are not supported"); | |
368 | $$ = $1; | |
369 | } | |
370 | ; | |
371 | ||
372 | /* The address at which an output section should be loaded. */ | |
373 | opt_at: | |
374 | /* empty */ | |
375 | { $$ = NULL; } | |
376 | | AT '(' exp ')' | |
377 | { $$ = $3; } | |
378 | ; | |
379 | ||
380 | /* The alignment of an output section. */ | |
381 | opt_align: | |
382 | /* empty */ | |
383 | { $$ = NULL; } | |
384 | | ALIGN_K '(' exp ')' | |
385 | { $$ = $3; } | |
386 | ; | |
387 | ||
388 | /* The input section alignment within an output section. */ | |
389 | opt_subalign: | |
390 | /* empty */ | |
391 | { $$ = NULL; } | |
392 | | SUBALIGN '(' exp ')' | |
393 | { $$ = $3; } | |
394 | ; | |
395 | ||
3802b2dd ILT |
396 | /* A section constraint. */ |
397 | opt_constraint: | |
398 | /* empty */ | |
399 | { $$ = CONSTRAINT_NONE; } | |
400 | | ONLY_IF_RO | |
401 | { $$ = CONSTRAINT_ONLY_IF_RO; } | |
402 | | ONLY_IF_RW | |
403 | { $$ = CONSTRAINT_ONLY_IF_RW; } | |
404 | | SPECIAL | |
405 | { $$ = CONSTRAINT_SPECIAL; } | |
406 | ; | |
407 | ||
494e05f4 ILT |
408 | /* The trailer of an output section in a SECTIONS block. */ |
409 | section_trailer: | |
494e05f4 ILT |
410 | opt_memspec opt_at_memspec opt_phdr opt_fill opt_comma |
411 | { | |
3802b2dd | 412 | $$.fill = $4; |
1c4f3631 | 413 | $$.phdrs = $3; |
494e05f4 ILT |
414 | } |
415 | ; | |
416 | ||
417 | /* A memory specification for an output section. */ | |
418 | opt_memspec: | |
e4967d85 | 419 | '>' string |
494e05f4 ILT |
420 | { yyerror(closure, "memory regions are not supported"); } |
421 | | /* empty */ | |
422 | ; | |
423 | ||
424 | /* A memory specification for where to load an output section. */ | |
425 | opt_at_memspec: | |
e4967d85 | 426 | AT '>' string |
494e05f4 ILT |
427 | { yyerror(closure, "memory regions are not supported"); } |
428 | | /* empty */ | |
429 | ; | |
430 | ||
431 | /* The program segment an output section should go into. */ | |
432 | opt_phdr: | |
e4967d85 | 433 | opt_phdr ':' string |
1c4f3631 | 434 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } |
494e05f4 | 435 | | /* empty */ |
1c4f3631 | 436 | { $$ = NULL; } |
494e05f4 ILT |
437 | ; |
438 | ||
a445fddf ILT |
439 | /* The value to use to fill an output section. FIXME: This does not |
440 | handle a string of arbitrary length. */ | |
494e05f4 | 441 | opt_fill: |
3802b2dd | 442 | '=' parse_exp |
494e05f4 ILT |
443 | { $$ = $2; } |
444 | | /* empty */ | |
445 | { $$ = NULL; } | |
446 | ; | |
447 | ||
448 | /* Commands which may appear within the description of an output | |
449 | section in a SECTIONS block. */ | |
450 | section_cmds: | |
451 | /* empty */ | |
452 | | section_cmds section_cmd | |
453 | ; | |
454 | ||
455 | /* A command which may appear within the description of an output | |
456 | section in a SECTIONS block. */ | |
457 | section_cmd: | |
458 | assignment end | |
459 | | input_section_spec | |
460 | | data_length '(' parse_exp ')' | |
461 | { script_add_data(closure, $1, $3); } | |
e4967d85 | 462 | | ASSERT_K '(' parse_exp ',' string ')' |
494e05f4 ILT |
463 | { script_add_assertion(closure, $3, $5.value, $5.length); } |
464 | | FILL '(' parse_exp ')' | |
465 | { script_add_fill(closure, $3); } | |
466 | | CONSTRUCTORS | |
467 | { | |
468 | /* The GNU linker uses CONSTRUCTORS for the a.out object | |
469 | file format. It does nothing when using ELF. Since | |
470 | some ELF linker scripts use it although it does | |
471 | nothing, we accept it and ignore it. */ | |
472 | } | |
3802b2dd | 473 | | SORT_BY_NAME '(' CONSTRUCTORS ')' |
494e05f4 ILT |
474 | | ';' |
475 | ; | |
476 | ||
477 | /* The length of data which may appear within the description of an | |
478 | output section in a SECTIONS block. */ | |
479 | data_length: | |
480 | QUAD | |
481 | { $$ = QUAD; } | |
482 | | SQUAD | |
483 | { $$ = SQUAD; } | |
484 | | LONG | |
485 | { $$ = LONG; } | |
486 | | SHORT | |
487 | { $$ = SHORT; } | |
488 | | BYTE | |
489 | { $$ = BYTE; } | |
490 | ; | |
491 | ||
492 | /* An input section specification. This may appear within the | |
493 | description of an output section in a SECTIONS block. */ | |
494 | input_section_spec: | |
495 | input_section_no_keep | |
496 | { script_add_input_section(closure, &$1, 0); } | |
497 | | KEEP '(' input_section_no_keep ')' | |
498 | { script_add_input_section(closure, &$3, 1); } | |
499 | ; | |
500 | ||
501 | /* An input section specification within a KEEP clause. */ | |
502 | input_section_no_keep: | |
e4967d85 | 503 | string |
494e05f4 ILT |
504 | { |
505 | $$.file.name = $1; | |
506 | $$.file.sort = SORT_WILDCARD_NONE; | |
507 | $$.input_sections.sections = NULL; | |
508 | $$.input_sections.exclude = NULL; | |
509 | } | |
510 | | wildcard_file '(' wildcard_sections ')' | |
511 | { | |
512 | $$.file = $1; | |
513 | $$.input_sections = $3; | |
514 | } | |
515 | ; | |
516 | ||
517 | /* A wildcard file specification. */ | |
518 | wildcard_file: | |
519 | wildcard_name | |
520 | { | |
521 | $$.name = $1; | |
522 | $$.sort = SORT_WILDCARD_NONE; | |
523 | } | |
524 | | SORT_BY_NAME '(' wildcard_name ')' | |
525 | { | |
526 | $$.name = $3; | |
527 | $$.sort = SORT_WILDCARD_BY_NAME; | |
528 | } | |
529 | ; | |
530 | ||
531 | /* A list of wild card section specifications. */ | |
532 | wildcard_sections: | |
533 | wildcard_sections opt_comma wildcard_section | |
534 | { | |
535 | $$.sections = script_string_sort_list_add($1.sections, &$3); | |
536 | $$.exclude = $1.exclude; | |
537 | } | |
538 | | wildcard_section | |
539 | { | |
540 | $$.sections = script_new_string_sort_list(&$1); | |
541 | $$.exclude = NULL; | |
542 | } | |
543 | | wildcard_sections opt_comma EXCLUDE_FILE '(' exclude_names ')' | |
544 | { | |
545 | $$.sections = $1.sections; | |
546 | $$.exclude = script_string_list_append($1.exclude, $5); | |
547 | } | |
548 | | EXCLUDE_FILE '(' exclude_names ')' | |
549 | { | |
550 | $$.sections = NULL; | |
551 | $$.exclude = $3; | |
552 | } | |
553 | ; | |
554 | ||
555 | /* A single wild card specification. */ | |
556 | wildcard_section: | |
557 | wildcard_name | |
558 | { | |
559 | $$.name = $1; | |
560 | $$.sort = SORT_WILDCARD_NONE; | |
561 | } | |
562 | | SORT_BY_NAME '(' wildcard_section ')' | |
563 | { | |
564 | $$.name = $3.name; | |
565 | switch ($3.sort) | |
566 | { | |
567 | case SORT_WILDCARD_NONE: | |
568 | $$.sort = SORT_WILDCARD_BY_NAME; | |
569 | break; | |
570 | case SORT_WILDCARD_BY_NAME: | |
571 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
572 | break; | |
573 | case SORT_WILDCARD_BY_ALIGNMENT: | |
574 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
575 | $$.sort = SORT_WILDCARD_BY_NAME_BY_ALIGNMENT; | |
576 | break; | |
577 | default: | |
578 | abort(); | |
579 | } | |
580 | } | |
581 | | SORT_BY_ALIGNMENT '(' wildcard_section ')' | |
582 | { | |
583 | $$.name = $3.name; | |
584 | switch ($3.sort) | |
585 | { | |
586 | case SORT_WILDCARD_NONE: | |
587 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT; | |
588 | break; | |
589 | case SORT_WILDCARD_BY_ALIGNMENT: | |
590 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
591 | break; | |
592 | case SORT_WILDCARD_BY_NAME: | |
593 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
594 | $$.sort = SORT_WILDCARD_BY_ALIGNMENT_BY_NAME; | |
595 | break; | |
596 | default: | |
597 | abort(); | |
598 | } | |
599 | } | |
600 | ; | |
601 | ||
602 | /* A list of file names to exclude. */ | |
603 | exclude_names: | |
604 | exclude_names opt_comma wildcard_name | |
605 | { $$ = script_string_list_push_back($1, $3.value, $3.length); } | |
606 | | wildcard_name | |
607 | { $$ = script_new_string_list($1.value, $1.length); } | |
608 | ; | |
609 | ||
610 | /* A single wildcard name. We recognize '*' and '?' specially since | |
611 | they are expression tokens. */ | |
612 | wildcard_name: | |
e4967d85 | 613 | string |
494e05f4 ILT |
614 | { $$ = $1; } |
615 | | '*' | |
616 | { | |
617 | $$.value = "*"; | |
618 | $$.length = 1; | |
619 | } | |
620 | | '?' | |
621 | { | |
622 | $$.value = "?"; | |
623 | $$.length = 1; | |
624 | } | |
625 | ; | |
626 | ||
d391083d ILT |
627 | /* A command which may appear at the top level of a linker script, or |
628 | within a SECTIONS block. */ | |
629 | file_or_sections_cmd: | |
10600224 | 630 | ENTRY '(' string ')' |
e5756efb ILT |
631 | { script_set_entry(closure, $3.value, $3.length); } |
632 | | assignment end | |
e4967d85 | 633 | | ASSERT_K '(' parse_exp ',' string ')' |
494e05f4 | 634 | { script_add_assertion(closure, $3, $5.value, $5.length); } |
e5756efb ILT |
635 | ; |
636 | ||
1c4f3631 ILT |
637 | /* A list of program header definitions. */ |
638 | phdrs_defs: | |
639 | phdrs_defs phdr_def | |
640 | | /* empty */ | |
641 | ; | |
642 | ||
643 | /* A program header definition. */ | |
644 | phdr_def: | |
645 | string phdr_type phdr_info ';' | |
646 | { script_add_phdr(closure, $1.value, $1.length, $2, &$3); } | |
647 | ; | |
648 | ||
649 | /* A program header type. The GNU linker accepts a general expression | |
650 | here, but that would be a pain because we would have to dig into | |
651 | the expression structure. It's unlikely that anybody uses anything | |
652 | other than a string or a number here, so that is all we expect. */ | |
653 | phdr_type: | |
654 | string | |
655 | { $$ = script_phdr_string_to_type(closure, $1.value, $1.length); } | |
656 | | INTEGER | |
657 | { $$ = $1; } | |
658 | ; | |
659 | ||
660 | /* Additional information for a program header. */ | |
661 | phdr_info: | |
662 | /* empty */ | |
663 | { memset(&$$, 0, sizeof(struct Phdr_info)); } | |
664 | | string phdr_info | |
665 | { | |
666 | $$ = $2; | |
667 | if ($1.length == 7 && strncmp($1.value, "FILEHDR", 7) == 0) | |
668 | $$.includes_filehdr = 1; | |
669 | else | |
670 | yyerror(closure, "PHDRS syntax error"); | |
671 | } | |
672 | | PHDRS phdr_info | |
673 | { | |
674 | $$ = $2; | |
675 | $$.includes_phdrs = 1; | |
676 | } | |
677 | | string '(' INTEGER ')' phdr_info | |
678 | { | |
679 | $$ = $5; | |
680 | if ($1.length == 5 && strncmp($1.value, "FLAGS", 5) == 0) | |
681 | { | |
682 | $$.is_flags_valid = 1; | |
683 | $$.flags = $3; | |
684 | } | |
685 | else | |
686 | yyerror(closure, "PHDRS syntax error"); | |
687 | } | |
688 | | AT '(' parse_exp ')' phdr_info | |
689 | { | |
690 | $$ = $5; | |
691 | $$.load_address = $3; | |
692 | } | |
693 | ; | |
694 | ||
e5756efb ILT |
695 | /* Set a symbol to a value. */ |
696 | assignment: | |
10600224 | 697 | string '=' parse_exp |
e5756efb | 698 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
10600224 | 699 | | string PLUSEQ parse_exp |
e5756efb ILT |
700 | { |
701 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
702 | Expression_ptr e = script_exp_binary_add(s, $3); | |
703 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
704 | } | |
10600224 | 705 | | string MINUSEQ parse_exp |
e5756efb ILT |
706 | { |
707 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
708 | Expression_ptr e = script_exp_binary_sub(s, $3); | |
709 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
710 | } | |
10600224 | 711 | | string MULTEQ parse_exp |
e5756efb ILT |
712 | { |
713 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
714 | Expression_ptr e = script_exp_binary_mult(s, $3); | |
715 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
716 | } | |
10600224 | 717 | | string DIVEQ parse_exp |
e5756efb ILT |
718 | { |
719 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
720 | Expression_ptr e = script_exp_binary_div(s, $3); | |
721 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
722 | } | |
10600224 | 723 | | string LSHIFTEQ parse_exp |
e5756efb ILT |
724 | { |
725 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
726 | Expression_ptr e = script_exp_binary_lshift(s, $3); | |
727 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
728 | } | |
10600224 | 729 | | string RSHIFTEQ parse_exp |
e5756efb ILT |
730 | { |
731 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
732 | Expression_ptr e = script_exp_binary_rshift(s, $3); | |
733 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
734 | } | |
10600224 | 735 | | string ANDEQ parse_exp |
e5756efb ILT |
736 | { |
737 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
738 | Expression_ptr e = script_exp_binary_bitwise_and(s, $3); | |
739 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
740 | } | |
10600224 | 741 | | string OREQ parse_exp |
e5756efb ILT |
742 | { |
743 | Expression_ptr s = script_exp_string($1.value, $1.length); | |
744 | Expression_ptr e = script_exp_binary_bitwise_or(s, $3); | |
745 | script_set_symbol(closure, $1.value, $1.length, e, 0, 0); | |
746 | } | |
10600224 | 747 | | PROVIDE '(' string '=' parse_exp ')' |
e5756efb | 748 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 0); } |
10600224 | 749 | | PROVIDE_HIDDEN '(' string '=' parse_exp ')' |
e5756efb ILT |
750 | { script_set_symbol(closure, $3.value, $3.length, $5, 1, 1); } |
751 | ; | |
752 | ||
753 | /* Parse an expression, putting the lexer into the right mode. */ | |
754 | parse_exp: | |
755 | { script_push_lex_into_expression_mode(closure); } | |
756 | exp | |
757 | { | |
758 | script_pop_lex_mode(closure); | |
759 | $$ = $2; | |
760 | } | |
761 | ; | |
762 | ||
763 | /* An expression. */ | |
764 | exp: | |
765 | '(' exp ')' | |
766 | { $$ = $2; } | |
767 | | '-' exp %prec UNARY | |
768 | { $$ = script_exp_unary_minus($2); } | |
769 | | '!' exp %prec UNARY | |
770 | { $$ = script_exp_unary_logical_not($2); } | |
771 | | '~' exp %prec UNARY | |
772 | { $$ = script_exp_unary_bitwise_not($2); } | |
773 | | '+' exp %prec UNARY | |
774 | { $$ = $2; } | |
775 | | exp '*' exp | |
776 | { $$ = script_exp_binary_mult($1, $3); } | |
777 | | exp '/' exp | |
778 | { $$ = script_exp_binary_div($1, $3); } | |
779 | | exp '%' exp | |
780 | { $$ = script_exp_binary_mod($1, $3); } | |
781 | | exp '+' exp | |
782 | { $$ = script_exp_binary_add($1, $3); } | |
783 | | exp '-' exp | |
784 | { $$ = script_exp_binary_sub($1, $3); } | |
785 | | exp LSHIFT exp | |
786 | { $$ = script_exp_binary_lshift($1, $3); } | |
787 | | exp RSHIFT exp | |
788 | { $$ = script_exp_binary_rshift($1, $3); } | |
789 | | exp EQ exp | |
790 | { $$ = script_exp_binary_eq($1, $3); } | |
791 | | exp NE exp | |
792 | { $$ = script_exp_binary_ne($1, $3); } | |
793 | | exp LE exp | |
794 | { $$ = script_exp_binary_le($1, $3); } | |
795 | | exp GE exp | |
796 | { $$ = script_exp_binary_ge($1, $3); } | |
797 | | exp '<' exp | |
798 | { $$ = script_exp_binary_lt($1, $3); } | |
799 | | exp '>' exp | |
800 | { $$ = script_exp_binary_gt($1, $3); } | |
801 | | exp '&' exp | |
802 | { $$ = script_exp_binary_bitwise_and($1, $3); } | |
803 | | exp '^' exp | |
804 | { $$ = script_exp_binary_bitwise_xor($1, $3); } | |
805 | | exp '|' exp | |
806 | { $$ = script_exp_binary_bitwise_or($1, $3); } | |
807 | | exp ANDAND exp | |
808 | { $$ = script_exp_binary_logical_and($1, $3); } | |
809 | | exp OROR exp | |
810 | { $$ = script_exp_binary_logical_or($1, $3); } | |
811 | | exp '?' exp ':' exp | |
812 | { $$ = script_exp_trinary_cond($1, $3, $5); } | |
813 | | INTEGER | |
814 | { $$ = script_exp_integer($1); } | |
e4967d85 | 815 | | string |
10600224 | 816 | { $$ = script_exp_string($1.value, $1.length); } |
e5756efb ILT |
817 | | MAX_K '(' exp ',' exp ')' |
818 | { $$ = script_exp_function_max($3, $5); } | |
819 | | MIN_K '(' exp ',' exp ')' | |
820 | { $$ = script_exp_function_min($3, $5); } | |
10600224 | 821 | | DEFINED '(' string ')' |
e5756efb ILT |
822 | { $$ = script_exp_function_defined($3.value, $3.length); } |
823 | | SIZEOF_HEADERS | |
824 | { $$ = script_exp_function_sizeof_headers(); } | |
10600224 | 825 | | ALIGNOF '(' string ')' |
e5756efb | 826 | { $$ = script_exp_function_alignof($3.value, $3.length); } |
10600224 | 827 | | SIZEOF '(' string ')' |
e5756efb | 828 | { $$ = script_exp_function_sizeof($3.value, $3.length); } |
10600224 | 829 | | ADDR '(' string ')' |
e5756efb | 830 | { $$ = script_exp_function_addr($3.value, $3.length); } |
10600224 | 831 | | LOADADDR '(' string ')' |
e5756efb | 832 | { $$ = script_exp_function_loadaddr($3.value, $3.length); } |
10600224 | 833 | | ORIGIN '(' string ')' |
e5756efb | 834 | { $$ = script_exp_function_origin($3.value, $3.length); } |
10600224 | 835 | | LENGTH '(' string ')' |
e5756efb | 836 | { $$ = script_exp_function_length($3.value, $3.length); } |
10600224 | 837 | | CONSTANT '(' string ')' |
e5756efb ILT |
838 | { $$ = script_exp_function_constant($3.value, $3.length); } |
839 | | ABSOLUTE '(' exp ')' | |
840 | { $$ = script_exp_function_absolute($3); } | |
841 | | ALIGN_K '(' exp ')' | |
842 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
843 | | ALIGN_K '(' exp ',' exp ')' | |
844 | { $$ = script_exp_function_align($3, $5); } | |
845 | | BLOCK '(' exp ')' | |
846 | { $$ = script_exp_function_align(script_exp_string(".", 1), $3); } | |
847 | | DATA_SEGMENT_ALIGN '(' exp ',' exp ')' | |
2d924fd9 ILT |
848 | { |
849 | script_data_segment_align(closure); | |
850 | $$ = script_exp_function_data_segment_align($3, $5); | |
851 | } | |
e5756efb | 852 | | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')' |
2d924fd9 ILT |
853 | { |
854 | script_data_segment_relro_end(closure); | |
855 | $$ = script_exp_function_data_segment_relro_end($3, $5); | |
856 | } | |
e5756efb ILT |
857 | | DATA_SEGMENT_END '(' exp ')' |
858 | { $$ = script_exp_function_data_segment_end($3); } | |
10600224 | 859 | | SEGMENT_START '(' string ',' exp ')' |
e5756efb ILT |
860 | { |
861 | $$ = script_exp_function_segment_start($3.value, $3.length, $5); | |
862 | } | |
10600224 | 863 | | ASSERT_K '(' exp ',' string ')' |
e5756efb ILT |
864 | { $$ = script_exp_function_assert($3, $5.value, $5.length); } |
865 | ; | |
866 | ||
867 | /* Handle the --defsym option. */ | |
868 | defsym_expr: | |
10600224 | 869 | string '=' parse_exp |
e5756efb ILT |
870 | { script_set_symbol(closure, $1.value, $1.length, $3, 0, 0); } |
871 | ; | |
872 | ||
c82fbeee CS |
873 | /* Handle the --dynamic-list option. A dynamic list has the format |
874 | { sym1; sym2; extern "C++" { namespace::sym3 }; }; | |
875 | We store the symbol we see in the "local" list; that is where | |
876 | Command_line::in_dynamic_list() will look to do its check. | |
877 | TODO(csilvers): More than one of these brace-lists can appear, and | |
878 | should just be merged and treated as a single list. */ | |
879 | dynamic_list_expr: dynamic_list_nodes ; | |
880 | ||
881 | dynamic_list_nodes: | |
882 | dynamic_list_node | |
883 | | dynamic_list_nodes dynamic_list_node | |
884 | ; | |
885 | ||
886 | dynamic_list_node: | |
887 | '{' vers_defns ';' '}' ';' | |
888 | { script_new_vers_node (closure, NULL, $2); } | |
889 | ; | |
890 | ||
09124467 | 891 | /* A version script. */ |
e5756efb | 892 | version_script: |
09124467 ILT |
893 | vers_nodes |
894 | ; | |
895 | ||
896 | vers_nodes: | |
897 | vers_node | |
898 | | vers_nodes vers_node | |
899 | ; | |
900 | ||
901 | vers_node: | |
902 | '{' vers_tag '}' ';' | |
903 | { | |
904 | script_register_vers_node (closure, NULL, 0, $2, NULL); | |
905 | } | |
10600224 | 906 | | string '{' vers_tag '}' ';' |
09124467 ILT |
907 | { |
908 | script_register_vers_node (closure, $1.value, $1.length, $3, | |
909 | NULL); | |
910 | } | |
10600224 | 911 | | string '{' vers_tag '}' verdep ';' |
09124467 ILT |
912 | { |
913 | script_register_vers_node (closure, $1.value, $1.length, $3, $5); | |
914 | } | |
915 | ; | |
916 | ||
917 | verdep: | |
10600224 | 918 | string |
09124467 ILT |
919 | { |
920 | $$ = script_add_vers_depend (closure, NULL, $1.value, $1.length); | |
921 | } | |
10600224 | 922 | | verdep string |
09124467 ILT |
923 | { |
924 | $$ = script_add_vers_depend (closure, $1, $2.value, $2.length); | |
925 | } | |
926 | ; | |
927 | ||
928 | vers_tag: | |
929 | /* empty */ | |
930 | { $$ = script_new_vers_node (closure, NULL, NULL); } | |
931 | | vers_defns ';' | |
932 | { $$ = script_new_vers_node (closure, $1, NULL); } | |
933 | | GLOBAL ':' vers_defns ';' | |
934 | { $$ = script_new_vers_node (closure, $3, NULL); } | |
935 | | LOCAL ':' vers_defns ';' | |
936 | { $$ = script_new_vers_node (closure, NULL, $3); } | |
937 | | GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';' | |
938 | { $$ = script_new_vers_node (closure, $3, $7); } | |
939 | ; | |
940 | ||
10600224 ILT |
941 | /* Here is one of the rare places we care about the distinction |
942 | between STRING and QUOTED_STRING. For QUOTED_STRING, we do exact | |
943 | matching on the pattern, so we pass in true for the exact_match | |
944 | parameter. For STRING, we do glob matching and pass in false. */ | |
09124467 ILT |
945 | vers_defns: |
946 | STRING | |
947 | { | |
948 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
10600224 ILT |
949 | $1.length, 0); |
950 | } | |
951 | | QUOTED_STRING | |
952 | { | |
953 | $$ = script_new_vers_pattern (closure, NULL, $1.value, | |
954 | $1.length, 1); | |
09124467 ILT |
955 | } |
956 | | vers_defns ';' STRING | |
957 | { | |
10600224 ILT |
958 | $$ = script_new_vers_pattern (closure, $1, $3.value, |
959 | $3.length, 0); | |
960 | } | |
961 | | vers_defns ';' QUOTED_STRING | |
962 | { | |
963 | $$ = script_new_vers_pattern (closure, $1, $3.value, | |
964 | $3.length, 1); | |
09124467 | 965 | } |
10600224 ILT |
966 | | /* Push string on the language stack. */ |
967 | EXTERN string '{' | |
968 | { version_script_push_lang (closure, $2.value, $2.length); } | |
09124467 ILT |
969 | vers_defns opt_semicolon '}' |
970 | { | |
971 | $$ = $5; | |
972 | version_script_pop_lang(closure); | |
973 | } | |
10600224 ILT |
974 | | /* Push string on the language stack. This is more complicated |
975 | than the other cases because we need to merge the linked-list | |
976 | state from the pre-EXTERN defns and the post-EXTERN defns. */ | |
977 | vers_defns ';' EXTERN string '{' | |
978 | { version_script_push_lang (closure, $4.value, $4.length); } | |
979 | vers_defns opt_semicolon '}' | |
980 | { | |
981 | $$ = script_merge_expressions ($1, $7); | |
982 | version_script_pop_lang(closure); | |
983 | } | |
09124467 ILT |
984 | | EXTERN // "extern" as a symbol name |
985 | { | |
986 | $$ = script_new_vers_pattern (closure, NULL, "extern", | |
10600224 | 987 | sizeof("extern") - 1, 1); |
09124467 ILT |
988 | } |
989 | | vers_defns ';' EXTERN | |
990 | { | |
991 | $$ = script_new_vers_pattern (closure, $1, "extern", | |
10600224 | 992 | sizeof("extern") - 1, 1); |
09124467 | 993 | } |
e5756efb ILT |
994 | ; |
995 | ||
10600224 ILT |
996 | /* A string can be either a STRING or a QUOTED_STRING. Almost all the |
997 | time we don't care, and we use this rule. */ | |
998 | string: | |
999 | STRING | |
1000 | { $$ = $1; } | |
1001 | | QUOTED_STRING | |
1002 | { $$ = $1; } | |
1003 | ; | |
1004 | ||
e5756efb ILT |
1005 | /* Some statements require a terminator, which may be a semicolon or a |
1006 | comma. */ | |
1007 | end: | |
1008 | ';' | |
1009 | | ',' | |
d391083d ILT |
1010 | ; |
1011 | ||
09124467 ILT |
1012 | /* An optional semicolon. */ |
1013 | opt_semicolon: | |
1014 | ';' | |
1015 | | /* empty */ | |
1016 | ; | |
1017 | ||
d391083d | 1018 | /* An optional comma. */ |
dbe717ef ILT |
1019 | opt_comma: |
1020 | ',' | |
1021 | | /* empty */ | |
1022 | ; | |
1023 | ||
1024 | %% |