File: script-c.h

package info (click to toggle)
binutils 2.28-5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 271,848 kB
  • sloc: ansic: 1,419,727; asm: 623,424; cpp: 125,042; exp: 64,226; makefile: 56,536; sh: 21,234; lisp: 15,206; yacc: 14,889; perl: 2,111; ada: 1,681; lex: 1,645; pascal: 1,438; cs: 879; sed: 195; python: 154; xml: 95; awk: 25
file content (567 lines) | stat: -rw-r--r-- 16,148 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
/* script-c.h -- C interface for linker scripts in gold.  */

/* Copyright (C) 2006-2017 Free Software Foundation, Inc.
   Written by Ian Lance Taylor <iant@google.com>.

   This file is part of gold.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

/* This file exists so that both the bison parser and script.cc can
   include it, so that they can communicate back and forth.  */

#ifndef GOLD_SCRIPT_C_H
#define GOLD_SCRIPT_C_H

#ifdef __cplusplus
#include <vector>
#include <string>
#endif

#ifdef __cplusplus

// For the C++ code we declare the various supporting structures in
// the gold namespace.  For the C code we declare it at the top level.
// The namespace level should not affect the layout of the structure.

namespace gold
{
#endif

/* A string value for the bison parser.  */

struct Parser_string
{
  const char* value;
  size_t length;
};

/* The expression functions deal with pointers to Expression objects.
   Since the bison parser generates C code, this is a hack to keep the
   C++ code type safe.  This hacks assumes that all pointers look
   alike.  */

#ifdef __cplusplus
class Expression;
typedef Expression* Expression_ptr;
#else
typedef void* Expression_ptr;
#endif

/* Script_section type.  */
enum Script_section_type
{
  /* No section type.  */
  SCRIPT_SECTION_TYPE_NONE,
  SCRIPT_SECTION_TYPE_NOLOAD,
  SCRIPT_SECTION_TYPE_DSECT,
  SCRIPT_SECTION_TYPE_COPY,
  SCRIPT_SECTION_TYPE_INFO,
  SCRIPT_SECTION_TYPE_OVERLAY
};

/* A constraint for whether to use a particular output section
   definition.  */

enum Section_constraint
{
  /* No constraint.  */
  CONSTRAINT_NONE,
  /* Only if all input sections are read-only.  */
  CONSTRAINT_ONLY_IF_RO,
  /* Only if at least input section is writable.  */
  CONSTRAINT_ONLY_IF_RW,
  /* Special constraint.  */
  CONSTRAINT_SPECIAL
};

/* The information we store for an output section header in the bison
   parser.  */

struct Parser_output_section_header
{
  /* The address.  This may be NULL.  */
  Expression_ptr address;
  /* Section type.  May be NULL string.  */ 
  enum Script_section_type section_type;
  /* The load address, from the AT specifier.  This may be NULL.  */
  Expression_ptr load_address;
  /* The alignment, from the ALIGN specifier.  This may be NULL.  */
  Expression_ptr align;
  /* The input section alignment, from the SUBALIGN specifier.  This
     may be NULL.  */
  Expression_ptr subalign;
  /* A constraint on this output section.  */
  enum Section_constraint constraint;
};

/* We keep vectors of strings.  In order to manage this in both C and
   C++, we use a pointer to a vector.  This assumes that all pointers
   look the same.  */

#ifdef __cplusplus
typedef std::vector<std::string> String_list;
typedef String_list* String_list_ptr;
#else
typedef void* String_list_ptr;
#endif

/* The information we store for an output section trailer in the bison
   parser.  */

struct Parser_output_section_trailer
{
  /* The fill value.  This may be NULL.  */
  Expression_ptr fill;
  /* The program segments this section should go into.  This may be
     NULL.  */
  String_list_ptr phdrs;
};

/* The different sorts we can find in a linker script.  */

enum Sort_wildcard
{
  SORT_WILDCARD_NONE,
  SORT_WILDCARD_BY_NAME,
  SORT_WILDCARD_BY_ALIGNMENT,
  SORT_WILDCARD_BY_NAME_BY_ALIGNMENT,
  SORT_WILDCARD_BY_ALIGNMENT_BY_NAME,
  SORT_WILDCARD_BY_INIT_PRIORITY
};

/* The information we build for a single wildcard specification.  */

struct Wildcard_section
{
  /* The wildcard spec itself.  */
  struct Parser_string name;
  /* How the entries should be sorted.  */
  enum Sort_wildcard sort;
};

/* A vector of Wildcard_section entries.  */

#ifdef __cplusplus
typedef std::vector<Wildcard_section> String_sort_list;
typedef String_sort_list* String_sort_list_ptr;
#else
typedef void* String_sort_list_ptr;
#endif

/* A list of wildcard specifications, which may include EXCLUDE_FILE
   clauses.  */

struct Wildcard_sections
{
  /* Wildcard specs.  */
  String_sort_list_ptr sections;
  /* Exclusions.  */
  String_list_ptr exclude;
};

/* A complete input section specification.  */

struct Input_section_spec
{
  /* The file name.  */
  struct Wildcard_section file;
  /* The list of sections.  */
  struct Wildcard_sections input_sections;
};

/* Information for a program header.  */

struct Phdr_info
{
  /* A boolean value: whether to include the file header.  */
  int includes_filehdr;
  /* A boolean value: whether to include the program headers.  */
  int includes_phdrs;
  /* A boolean value: whether the flags field is valid.  */
  int is_flags_valid;
  /* The value to use for the flags.  */
  unsigned int flags;
  /* The load address.  */
  Expression_ptr load_address;
};

struct Version_dependency_list;
struct Version_expression_list;
struct Version_tree;

#ifdef __cplusplus
extern "C" {
#endif

/* The bison parser definitions.  */

#include "yyscript.h"

/* The bison parser function.  */

extern int
yyparse(void* closure);

/* Called by the bison parser skeleton to return the next token.  */

extern int
yylex(YYSTYPE*, void* closure);

/* Called by the bison parser skeleton to report an error.  */

extern void
yyerror(void* closure, const char*);

/* Called by the bison parser to add an external symbol (a symbol in
   an EXTERN declaration) to the link.  */

extern void
script_add_extern(void* closure, const char*, size_t);

/* Called by the bison parser to add a file to the link.  */

extern void
script_add_file(void* closure, const char*, size_t);

/* Called by the bison parser to add a library to the link.  */

extern void
script_add_library(void* closure, const char*, size_t);

/* Called by the bison parser to start and stop a group.  */

extern void
script_start_group(void* closure);
extern void
script_end_group(void* closure);

/* Called by the bison parser to start and end an AS_NEEDED list.  */

extern void
script_start_as_needed(void* closure);
extern void
script_end_as_needed(void* closure);

/* Called by the bison parser to set the entry symbol.  */

extern void
script_set_entry(void* closure, const char*, size_t);

/* Called by the bison parser to set whether to define common symbols.  */

extern void
script_set_common_allocation(void* closure, int);

/* Called by the bison parser to parse an OPTION.  */

extern void
script_parse_option(void* closure, const char*, size_t);

/* Called by the bison parser to handle OUTPUT_FORMAT.  This return 0
   if the parse should be aborted.  */

extern int
script_check_output_format(void* closure, const char*, size_t,
			   const char*, size_t, const char*, size_t);

/* Called by the bison parser to handle TARGET.  */
extern void
script_set_target(void* closure, const char*, size_t);

/* Called by the bison parser to handle SEARCH_DIR.  */

extern void
script_add_search_dir(void* closure, const char*, size_t);

/* Called by the bison parser to push the lexer into expression
   mode.  */

extern void
script_push_lex_into_expression_mode(void* closure);

/* Called by the bison parser to push the lexer into version
   mode.  */

extern void
script_push_lex_into_version_mode(void* closure);

/* Called by the bison parser to pop the lexer mode.  */

extern void
script_pop_lex_mode(void* closure);

/* Called by the bison parser to get the value of a symbol.  This is
   called for a reference to a symbol, but is not called for something
   like "sym += 10".  Uses of the special symbol "." can just call
   script_exp_string.  */

extern Expression_ptr
script_symbol(void* closure, const char*, size_t);

/* Called by the bison parser to set a symbol to a value.  PROVIDE is
   non-zero if the symbol should be provided--only defined if there is
   an undefined reference.  HIDDEN is non-zero if the symbol should be
   hidden.  */

extern void
script_set_symbol(void* closure, const char*, size_t, Expression_ptr,
		  int provide, int hidden);

/* Called by the bison parser to add an assertion.  */

extern void
script_add_assertion(void* closure, Expression_ptr, const char* message,
		     size_t messagelen);

/* Called by the bison parser to start a SECTIONS clause.  */

extern void
script_start_sections(void* closure);

/* Called by the bison parser to finish a SECTIONS clause.  */

extern void
script_finish_sections(void* closure);

/* Called by the bison parser to start handling input section
   specifications for an output section.  */

extern void
script_start_output_section(void* closure, const char* name, size_t namelen,
			    const struct Parser_output_section_header*);

/* Called by the bison parser when done handling input section
   specifications for an output section.  */

extern void
script_finish_output_section(void* closure,
			     const struct Parser_output_section_trailer*);

/* Called by the bison parser to handle a data statement (LONG, BYTE,
   etc.) in an output section.  */

extern void
script_add_data(void* closure, int data_token, Expression_ptr val);

/* Called by the bison parser to set the fill value in an output
   section.  */

extern void
script_add_fill(void* closure, Expression_ptr val);

/* Called by the bison parser to add an input section specification to
   an output section.  The KEEP parameter is non-zero if this is
   within a KEEP clause, meaning that the garbage collector should not
   discard it.  */

extern void
script_add_input_section(void* closure, const struct Input_section_spec*,
			 int keep);

/* Create a new list of string and sort entries.  */

extern String_sort_list_ptr
script_new_string_sort_list(const struct Wildcard_section*);

/* Add an entry to a list of string and sort entries.  */

extern String_sort_list_ptr
script_string_sort_list_add(String_sort_list_ptr,
			    const struct Wildcard_section*);

/* Create a new list of strings.  */

extern String_list_ptr
script_new_string_list(const char*, size_t);

/* Add an element to a list of strings.  */

extern String_list_ptr
script_string_list_push_back(String_list_ptr, const char*, size_t);

/* Concatenate two string lists.  */

extern String_list_ptr
script_string_list_append(String_list_ptr, String_list_ptr);

/* Define a new program header.  */

extern void
script_add_phdr(void* closure, const char* name, size_t namelen,
		unsigned int type, const struct Phdr_info*);

/* Convert a program header string to a type.  */

extern unsigned int
script_phdr_string_to_type(void* closure, const char*, size_t);

/* Handle DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END.  */

extern void
script_data_segment_align(void* closure);

extern void
script_data_segment_relro_end(void* closure);

/* Record the fact that a SEGMENT_START expression is seen.  */

extern void
script_saw_segment_start_expression(void* closure);

/* Called by the bison parser for MEMORY regions.  */

extern void
script_add_memory(void*, const char*, size_t, unsigned int,
		  Expression_ptr, Expression_ptr);

extern unsigned int
script_parse_memory_attr(void*, const char*, size_t, int);

extern void
script_set_section_region(void*, const char*, size_t, int);

extern void
script_include_directive(int, void *, const char*, size_t);
  
/* Called by the bison parser for expressions.  */

extern Expression_ptr
script_exp_unary_minus(Expression_ptr);
extern Expression_ptr
script_exp_unary_logical_not(Expression_ptr);
extern Expression_ptr
script_exp_unary_bitwise_not(Expression_ptr);
extern Expression_ptr
script_exp_binary_mult(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_div(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_mod(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_add(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_sub(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_lshift(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_rshift(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_eq(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_ne(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_le(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_ge(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_lt(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_gt(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_bitwise_and(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_bitwise_xor(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_bitwise_or(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_logical_and(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_binary_logical_or(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_trinary_cond(Expression_ptr, Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_integer(uint64_t);
extern Expression_ptr
script_exp_string(const char*, size_t);
extern Expression_ptr
script_exp_function_max(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_function_min(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_function_defined(const char*, size_t);
extern Expression_ptr
script_exp_function_sizeof_headers(void);
extern Expression_ptr
script_exp_function_alignof(const char*, size_t);
extern Expression_ptr
script_exp_function_sizeof(const char*, size_t);
extern Expression_ptr
script_exp_function_addr(const char*, size_t);
extern Expression_ptr
script_exp_function_loadaddr(const char*, size_t);
extern Expression_ptr
script_exp_function_origin(void*, const char*, size_t);
extern Expression_ptr
script_exp_function_length(void*, const char*, size_t);
extern Expression_ptr
script_exp_function_constant(const char*, size_t);
extern Expression_ptr
script_exp_function_absolute(Expression_ptr);
extern Expression_ptr
script_exp_function_align(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_function_data_segment_align(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_function_data_segment_relro_end(Expression_ptr, Expression_ptr);
extern Expression_ptr
script_exp_function_data_segment_end(Expression_ptr);
extern Expression_ptr
script_exp_function_segment_start(const char*, size_t, Expression_ptr);
extern Expression_ptr
script_exp_function_assert(Expression_ptr, const char*, size_t);

extern void
script_register_vers_node(void* closure,
			  const char* tag,
			  int taglen,
			  struct Version_tree*,
			  struct Version_dependency_list*);

extern struct Version_dependency_list*
script_add_vers_depend(void* closure,
		       struct Version_dependency_list* existing_dependencies,
		       const char* depend_to_add, int deplen);

extern struct Version_expression_list*
script_new_vers_pattern(void* closure,
			struct Version_expression_list*,
			const char*, int, int);

extern struct Version_expression_list*
script_merge_expressions(struct Version_expression_list* a,
                         struct Version_expression_list* b);

extern struct Version_tree*
script_new_vers_node(void* closure,
		     struct Version_expression_list* global,
		     struct Version_expression_list* local);

extern void
version_script_push_lang(void* closure, const char* lang, int langlen);

extern void
version_script_pop_lang(void* closure);

#ifdef __cplusplus
} // End extern "C"
#endif

#ifdef __cplusplus
} // End namespace gold.
#endif

#endif /* !defined(GOLD_SCRIPT_C_H) */