1 /* script-c.h -- C interface for linker scripts in gold. */
3 /* Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor <iant@google.com>.
6 This file is part of gold.
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.
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.
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. */
23 /* This file exists so that both the bison parser and script.cc can
24 include it, so that they can communicate back and forth. */
26 #ifndef GOLD_SCRIPT_C_H
27 #define GOLD_SCRIPT_C_H
36 // For the C++ code we declare the various supporting structures in
37 // the gold namespace. For the C code we declare it at the top level.
38 // The namespace level should not affect the layout of the structure.
44 /* A string value for the bison parser. */
52 /* The expression functions deal with pointers to Expression objects.
53 Since the bison parser generates C code, this is a hack to keep the
54 C++ code type safe. This hacks assumes that all pointers look
59 typedef Expression* Expression_ptr;
61 typedef void* Expression_ptr;
64 /* A constraint for whether to use a particular output section
67 enum Section_constraint
71 /* Only if all input sections are read-only. */
72 CONSTRAINT_ONLY_IF_RO,
73 /* Only if at least input section is writable. */
74 CONSTRAINT_ONLY_IF_RW,
75 /* Special constraint. */
79 /* The information we store for an output section header in the bison
82 struct Parser_output_section_header
84 /* The address. This may be NULL. */
85 Expression_ptr address;
86 /* The load address, from the AT specifier. This may be NULL. */
87 Expression_ptr load_address;
88 /* The alignment, from the ALIGN specifier. This may be NULL. */
90 /* The input section alignment, from the SUBALIGN specifier. This
92 Expression_ptr subalign;
93 /* A constraint on this output section. */
94 enum Section_constraint constraint;
97 /* We keep vectors of strings. In order to manage this in both C and
98 C++, we use a pointer to a vector. This assumes that all pointers
102 typedef std::vector<std::string> String_list;
103 typedef String_list* String_list_ptr;
105 typedef void* String_list_ptr;
108 /* The information we store for an output section trailer in the bison
111 struct Parser_output_section_trailer
113 /* The fill value. This may be NULL. */
115 /* The program segments this section should go into. This may be
117 String_list_ptr phdrs;
120 /* The different sorts we can find in a linker script. */
125 SORT_WILDCARD_BY_NAME,
126 SORT_WILDCARD_BY_ALIGNMENT,
127 SORT_WILDCARD_BY_NAME_BY_ALIGNMENT,
128 SORT_WILDCARD_BY_ALIGNMENT_BY_NAME
131 /* The information we build for a single wildcard specification. */
133 struct Wildcard_section
135 /* The wildcard spec itself. */
136 struct Parser_string name;
137 /* How the entries should be sorted. */
138 enum Sort_wildcard sort;
141 /* A vector of Wildcard_section entries. */
144 typedef std::vector<Wildcard_section> String_sort_list;
145 typedef String_sort_list* String_sort_list_ptr;
147 typedef void* String_sort_list_ptr;
150 /* A list of wildcard specifications, which may include EXCLUDE_FILE
153 struct Wildcard_sections
155 /* Wildcard specs. */
156 String_sort_list_ptr sections;
158 String_list_ptr exclude;
161 /* A complete input section specification. */
163 struct Input_section_spec
166 struct Wildcard_section file;
167 /* The list of sections. */
168 struct Wildcard_sections input_sections;
171 /* Information for a program header. */
175 /* A boolean value: whether to include the file header. */
176 int includes_filehdr;
177 /* A boolean value: whether to include the program headers. */
179 /* A boolean value: whether the flags field is valid. */
181 /* The value to use for the flags. */
183 /* The load address. */
184 Expression_ptr load_address;
187 struct Version_dependency_list;
188 struct Version_expression_list;
195 /* The bison parser definitions. */
197 #include "yyscript.h"
199 /* The bison parser function. */
202 yyparse(void* closure);
204 /* Called by the bison parser skeleton to return the next token. */
207 yylex(YYSTYPE*, void* closure);
209 /* Called by the bison parser skeleton to report an error. */
212 yyerror(void* closure, const char*);
214 /* Called by the bison parser to add an external symbol (a symbol in
215 an EXTERN declaration) to the link. */
218 script_add_extern(void* closure, const char*, size_t);
220 /* Called by the bison parser to add a file to the link. */
223 script_add_file(void* closure, const char*, size_t);
225 /* Called by the bison parser to start and stop a group. */
228 script_start_group(void* closure);
230 script_end_group(void* closure);
232 /* Called by the bison parser to start and end an AS_NEEDED list. */
235 script_start_as_needed(void* closure);
237 script_end_as_needed(void* closure);
239 /* Called by the bison parser to set the entry symbol. */
242 script_set_entry(void* closure, const char*, size_t);
244 /* Called by the bison parser to set whether to define common symbols. */
247 script_set_common_allocation(void* closure, int);
249 /* Called by the bison parser to parse an OPTION. */
252 script_parse_option(void* closure, const char*, size_t);
254 /* Called by the bison parser to handle OUTPUT_FORMAT. This return 0
255 if the parse should be aborted. */
258 script_check_output_format(void* closure, const char*, size_t,
259 const char*, size_t, const char*, size_t);
261 /* Called by the bison parser to handle SEARCH_DIR. */
264 script_add_search_dir(void* closure, const char*, size_t);
266 /* Called by the bison parser to push the lexer into expression
270 script_push_lex_into_expression_mode(void* closure);
272 /* Called by the bison parser to push the lexer into version
276 script_push_lex_into_version_mode(void* closure);
278 /* Called by the bison parser to pop the lexer mode. */
281 script_pop_lex_mode(void* closure);
283 /* Called by the bison parser to set a symbol to a value. PROVIDE is
284 non-zero if the symbol should be provided--only defined if there is
285 an undefined reference. HIDDEN is non-zero if the symbol should be
289 script_set_symbol(void* closure, const char*, size_t, Expression_ptr,
290 int provide, int hidden);
292 /* Called by the bison parser to add an assertion. */
295 script_add_assertion(void* closure, Expression_ptr, const char* message,
298 /* Called by the bison parser to start a SECTIONS clause. */
301 script_start_sections(void* closure);
303 /* Called by the bison parser to finish a SECTIONS clause. */
306 script_finish_sections(void* closure);
308 /* Called by the bison parser to start handling input section
309 specifications for an output section. */
312 script_start_output_section(void* closure, const char* name, size_t namelen,
313 const struct Parser_output_section_header*);
315 /* Called by the bison parser when done handling input section
316 specifications for an output section. */
319 script_finish_output_section(void* closure,
320 const struct Parser_output_section_trailer*);
322 /* Called by the bison parser to handle a data statement (LONG, BYTE,
323 etc.) in an output section. */
326 script_add_data(void* closure, int data_token, Expression_ptr val);
328 /* Called by the bison parser to set the fill value in an output
332 script_add_fill(void* closure, Expression_ptr val);
334 /* Called by the bison parser to add an input section specification to
335 an output section. The KEEP parameter is non-zero if this is
336 within a KEEP clause, meaning that the garbage collector should not
340 script_add_input_section(void* closure, const struct Input_section_spec*,
343 /* Create a new list of string and sort entries. */
345 extern String_sort_list_ptr
346 script_new_string_sort_list(const struct Wildcard_section*);
348 /* Add an entry to a list of string and sort entries. */
350 extern String_sort_list_ptr
351 script_string_sort_list_add(String_sort_list_ptr,
352 const struct Wildcard_section*);
354 /* Create a new list of strings. */
356 extern String_list_ptr
357 script_new_string_list(const char*, size_t);
359 /* Add an element to a list of strings. */
361 extern String_list_ptr
362 script_string_list_push_back(String_list_ptr, const char*, size_t);
364 /* Concatenate two string lists. */
366 extern String_list_ptr
367 script_string_list_append(String_list_ptr, String_list_ptr);
369 /* Define a new program header. */
372 script_add_phdr(void* closure, const char* name, size_t namelen,
373 unsigned int type, const struct Phdr_info*);
375 /* Convert a program header string to a type. */
378 script_phdr_string_to_type(void* closure, const char*, size_t);
380 /* Handle DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */
383 script_data_segment_align(void* closure);
386 script_data_segment_relro_end(void* closure);
388 /* Called by the bison parser for expressions. */
390 extern Expression_ptr
391 script_exp_unary_minus(Expression_ptr);
392 extern Expression_ptr
393 script_exp_unary_logical_not(Expression_ptr);
394 extern Expression_ptr
395 script_exp_unary_bitwise_not(Expression_ptr);
396 extern Expression_ptr
397 script_exp_binary_mult(Expression_ptr, Expression_ptr);
398 extern Expression_ptr
399 script_exp_binary_div(Expression_ptr, Expression_ptr);
400 extern Expression_ptr
401 script_exp_binary_mod(Expression_ptr, Expression_ptr);
402 extern Expression_ptr
403 script_exp_binary_add(Expression_ptr, Expression_ptr);
404 extern Expression_ptr
405 script_exp_binary_sub(Expression_ptr, Expression_ptr);
406 extern Expression_ptr
407 script_exp_binary_lshift(Expression_ptr, Expression_ptr);
408 extern Expression_ptr
409 script_exp_binary_rshift(Expression_ptr, Expression_ptr);
410 extern Expression_ptr
411 script_exp_binary_eq(Expression_ptr, Expression_ptr);
412 extern Expression_ptr
413 script_exp_binary_ne(Expression_ptr, Expression_ptr);
414 extern Expression_ptr
415 script_exp_binary_le(Expression_ptr, Expression_ptr);
416 extern Expression_ptr
417 script_exp_binary_ge(Expression_ptr, Expression_ptr);
418 extern Expression_ptr
419 script_exp_binary_lt(Expression_ptr, Expression_ptr);
420 extern Expression_ptr
421 script_exp_binary_gt(Expression_ptr, Expression_ptr);
422 extern Expression_ptr
423 script_exp_binary_bitwise_and(Expression_ptr, Expression_ptr);
424 extern Expression_ptr
425 script_exp_binary_bitwise_xor(Expression_ptr, Expression_ptr);
426 extern Expression_ptr
427 script_exp_binary_bitwise_or(Expression_ptr, Expression_ptr);
428 extern Expression_ptr
429 script_exp_binary_logical_and(Expression_ptr, Expression_ptr);
430 extern Expression_ptr
431 script_exp_binary_logical_or(Expression_ptr, Expression_ptr);
432 extern Expression_ptr
433 script_exp_trinary_cond(Expression_ptr, Expression_ptr, Expression_ptr);
434 extern Expression_ptr
435 script_exp_integer(uint64_t);
436 extern Expression_ptr
437 script_exp_string(const char*, size_t);
438 extern Expression_ptr
439 script_exp_function_max(Expression_ptr, Expression_ptr);
440 extern Expression_ptr
441 script_exp_function_min(Expression_ptr, Expression_ptr);
442 extern Expression_ptr
443 script_exp_function_defined(const char*, size_t);
444 extern Expression_ptr
445 script_exp_function_sizeof_headers(void);
446 extern Expression_ptr
447 script_exp_function_alignof(const char*, size_t);
448 extern Expression_ptr
449 script_exp_function_sizeof(const char*, size_t);
450 extern Expression_ptr
451 script_exp_function_addr(const char*, size_t);
452 extern Expression_ptr
453 script_exp_function_loadaddr(const char*, size_t);
454 extern Expression_ptr
455 script_exp_function_origin(const char*, size_t);
456 extern Expression_ptr
457 script_exp_function_length(const char*, size_t);
458 extern Expression_ptr
459 script_exp_function_constant(const char*, size_t);
460 extern Expression_ptr
461 script_exp_function_absolute(Expression_ptr);
462 extern Expression_ptr
463 script_exp_function_align(Expression_ptr, Expression_ptr);
464 extern Expression_ptr
465 script_exp_function_data_segment_align(Expression_ptr, Expression_ptr);
466 extern Expression_ptr
467 script_exp_function_data_segment_relro_end(Expression_ptr, Expression_ptr);
468 extern Expression_ptr
469 script_exp_function_data_segment_end(Expression_ptr);
470 extern Expression_ptr
471 script_exp_function_segment_start(const char*, size_t, Expression_ptr);
472 extern Expression_ptr
473 script_exp_function_assert(Expression_ptr, const char*, size_t);
476 script_register_vers_node(void* closure,
479 struct Version_tree *,
480 struct Version_dependency_list *);
482 extern struct Version_dependency_list *
483 script_add_vers_depend(void* closure,
484 struct Version_dependency_list *existing_dependencies,
485 const char *depend_to_add, int deplen);
487 extern struct Version_expression_list *
488 script_new_vers_pattern(void* closure,
489 struct Version_expression_list *,
490 const char *, int, int);
492 extern struct Version_expression_list *
493 script_merge_expressions(struct Version_expression_list *a,
494 struct Version_expression_list *b);
496 extern struct Version_tree *
497 script_new_vers_node(void* closure,
498 struct Version_expression_list *global,
499 struct Version_expression_list *local);
502 version_script_push_lang(void* closure, const char* lang, int langlen);
505 version_script_pop_lang(void* closure);
512 } // End namespace gold.
515 #endif /* !defined(GOLD_SCRIPT_C_H) */