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