aboutsummaryrefslogtreecommitdiff
path: root/ld/ldlang.h
blob: a4e3ca7e90303aa0834fb38ed5a540d96fe3c1cf (plain)
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
/* ldlang.h - linker command language support
   Copyright 1991, 1992, 1993 Free Software Foundation, Inc.
   
   This file is part of GLD, the Gnu Linker.
   
   GLD 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 1, or (at your option)
   any later version.
   
   GLD 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 GLD; see the file COPYING.  If not, write to
   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef LDLANG_H
#define LDLANG_H

typedef enum
{
  lang_input_file_is_l_enum,
  lang_input_file_is_symbols_only_enum,
  lang_input_file_is_marker_enum,
  lang_input_file_is_fake_enum,
  lang_input_file_is_search_file_enum,
  lang_input_file_is_file_enum
} lang_input_file_enum_type;

typedef unsigned int fill_type;
typedef struct statement_list
{
  union lang_statement_union *head;
  union lang_statement_union **tail;
} lang_statement_list_type;


typedef struct memory_region_struct
{
  char *name;
  struct memory_region_struct *next;
  bfd_vma origin;
  bfd_size_type length;
  bfd_vma current;
  bfd_size_type old_length;
  int flags;
  boolean had_full_message;
} lang_memory_region_type ;

typedef struct lang_statement_header_struct 
{
  union  lang_statement_union  *next;
  enum statement_enum
    {
      lang_output_section_statement_enum,
      lang_assignment_statement_enum,
      lang_input_statement_enum,
      lang_address_statement_enum,
      lang_wild_statement_enum,
      lang_input_section_enum,
      lang_object_symbols_statement_enum,
      lang_fill_statement_enum,
      lang_data_statement_enum,
      lang_reloc_statement_enum,
      lang_target_statement_enum,
      lang_output_statement_enum,
      lang_padding_statement_enum,
      
      lang_afile_asection_pair_statement_enum,
      lang_constructors_statement_enum
    } type;
} lang_statement_header_type;


typedef struct 
{
  lang_statement_header_type header;
  union etree_union *exp;
} lang_assignment_statement_type;


typedef struct lang_target_statement_struct
{
  lang_statement_header_type header;
  const char *target;
} lang_target_statement_type;


typedef struct lang_output_statement_struct
{
  lang_statement_header_type header;
  const char *name;
} lang_output_statement_type;


typedef struct lang_output_section_statement_struct 
{
  lang_statement_header_type header;
  union etree_union *addr_tree;
  lang_statement_list_type children;
  const char *memspec;
  union lang_statement_union *next;
  const char *name;

  boolean processed;
    
  asection *bfd_section;
  int flags;			/* Or together of all input sections */
  int loadable;			/* set from NOLOAD flag in script */
  struct memory_region_struct *region;
  size_t block_value;
  fill_type fill;

  int subsection_alignment;  /* alignment of components */
  int section_alignment;  /* alignment of start of section */

  union etree_union *load_base;  
} lang_output_section_statement_type;


typedef struct
{
  lang_statement_header_type header;
} lang_common_statement_type;

typedef struct
{
  lang_statement_header_type header;
} lang_object_symbols_statement_type;

typedef struct
{
  lang_statement_header_type header;
  fill_type fill;
  int size;
  asection *output_section;
} lang_fill_statement_type;

typedef struct
{
  lang_statement_header_type header;
  unsigned int type;
  union  etree_union *exp;
  bfd_vma value;
  asection *output_section;
  bfd_vma output_vma;
} lang_data_statement_type;

/* Generate a reloc in the output file.  */

typedef struct
{
  lang_statement_header_type header;

  /* Reloc to generate.  */
  bfd_reloc_code_real_type reloc;

  /* Reloc howto structure.  */
  const reloc_howto_type *howto;

  /* Section to generate reloc against.  Exactly one of section and
     name must be NULL.  */
  asection *section;

  /* Name of symbol to generate reloc against.  Exactly one of section
     and name must be NULL.  */
  const char *name;

  /* Expression for addend.  */
  union etree_union *addend_exp;

  /* Resolved addend.  */
  bfd_vma addend_value;

  /* Output section where reloc should be performed.  */
  asection *output_section;

  /* VMA within output section.  */
  bfd_vma output_vma;
} lang_reloc_statement_type;

typedef struct lang_input_statement_struct
{
  lang_statement_header_type header;
  /* Name of this file.  */
  const char *filename;
  /* Name to use for the symbol giving address of text start */
  /* Usually the same as filename, but for a file spec'd with -l
     this is the -l switch itself rather than the filename.  */
  const char *local_sym_name;
    
  bfd *the_bfd;
    
  boolean closed;
  file_ptr passive_position;
    
  /* Symbol table of the file.  */
  asymbol **asymbols;
  unsigned int symbol_count;
    
  /* Point to the next file - whatever it is, wanders up and down
     archives */
    
  union lang_statement_union  *next;
  /* Point to the next file, but skips archive contents */
  union  lang_statement_union  *next_real_file;
    
  boolean is_archive;
    
  /* 1 means search a set of directories for this file.  */
  boolean search_dirs_flag;
    
  /* 1 means this is base file of incremental load.
     Do not load this file's text or data.
     Also default text_start to after this file's bss. */
    
  boolean just_syms_flag;
    
  boolean loaded;
    
    
  /*    unsigned int globals_in_this_file;*/
  const char *target;
  boolean real;
  asection *common_section;
  asection *common_output_section;
  boolean complained;
} lang_input_statement_type;

typedef struct
{
  lang_statement_header_type header;
  asection *section;
  lang_input_statement_type *ifile;
  
} lang_input_section_type;


typedef struct
{
  lang_statement_header_type header;
  asection *section;
  union lang_statement_union *file;
} lang_afile_asection_pair_statement_type;

typedef struct lang_wild_statement_struct
{
  lang_statement_header_type header;
  const char *section_name;
  const char *filename;
  lang_statement_list_type children;
} lang_wild_statement_type;

typedef struct lang_address_statement_struct
{
  lang_statement_header_type header;
  const  char *section_name;
  union  etree_union *address;
} lang_address_statement_type;

typedef struct
{
  lang_statement_header_type header;
  bfd_vma output_offset;
  size_t size;
  asection *output_section;
  fill_type fill;
} lang_padding_statement_type;

typedef union lang_statement_union 
{
  lang_statement_header_type header;
  union lang_statement_union *next;
  lang_wild_statement_type wild_statement;
  lang_data_statement_type data_statement;
  lang_reloc_statement_type reloc_statement;
  lang_address_statement_type address_statement;
  lang_output_section_statement_type output_section_statement;
  lang_afile_asection_pair_statement_type afile_asection_pair_statement;
  lang_assignment_statement_type assignment_statement;
  lang_input_statement_type input_statement;
  lang_target_statement_type target_statement;
  lang_output_statement_type output_statement;
  lang_input_section_type input_section;
  lang_common_statement_type common_statement;
  lang_object_symbols_statement_type object_symbols_statement;
  lang_fill_statement_type fill_statement;
  lang_padding_statement_type padding_statement;
} lang_statement_union_type;

extern lang_output_section_statement_type *abs_output_section;
extern boolean lang_has_input_file;
extern etree_type *base;
extern lang_statement_list_type *stat_ptr;
extern boolean delete_output_file_on_failure;

extern void lang_init PARAMS ((void));
extern struct memory_region_struct *lang_memory_region_lookup
  PARAMS ((const char *const));
extern void lang_map PARAMS ((void));
extern void lang_set_flags PARAMS ((int *, const char *));
extern void lang_add_output PARAMS ((const char *, int from_script));
extern void lang_enter_output_section_statement
  PARAMS ((const char *output_section_statement_name,
	   etree_type * address_exp,
	   int flags,
	   bfd_vma block_value,
	   etree_type *align,
	   etree_type *subalign,
	   etree_type *));
extern void lang_final PARAMS ((void));
extern void lang_process PARAMS ((void));
extern void lang_section_start PARAMS ((const char *, union etree_union *));
extern void lang_add_entry PARAMS ((const char *, int));
extern void lang_add_target PARAMS ((const char *));
extern void lang_add_wild PARAMS ((const char *const , const char *const));
extern void lang_add_map PARAMS ((const char *));
extern void lang_add_fill PARAMS ((int));
extern void lang_add_assignment PARAMS ((union etree_union *));
extern void lang_add_attribute PARAMS ((enum statement_enum));
extern void lang_startup PARAMS ((const char *));
extern void lang_float PARAMS ((enum bfd_boolean));
extern void lang_leave_output_section_statement PARAMS ((bfd_vma,
							 const char *));
extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
						     const char *));
extern void lang_statement_append PARAMS ((struct statement_list *,
					   union lang_statement_union *,
					   union lang_statement_union **));
extern void lang_for_each_file
  PARAMS ((void (*dothis) (lang_input_statement_type *)));

#define LANG_FOR_EACH_INPUT_STATEMENT(statement)		\
  extern lang_statement_list_type file_chain;			\
  lang_input_statement_type *statement;				\
  for (statement = (lang_input_statement_type *)file_chain.head;\
       statement != (lang_input_statement_type *)NULL;		\
       statement = (lang_input_statement_type *)statement->next)\
  
extern void lang_process PARAMS ((void));
extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
extern lang_output_section_statement_type *lang_output_section_find
  PARAMS ((const char * const));
extern lang_input_statement_type *lang_add_input_file
  PARAMS ((const char *name, lang_input_file_enum_type file_type,
	   const char *target));
extern void lang_add_keepsyms_file PARAMS ((const char *filename));
extern lang_output_section_statement_type *
  lang_output_section_statement_lookup PARAMS ((const char * const name));
extern void ldlang_add_undef PARAMS ((const char *const name));
extern void lang_add_output_format PARAMS ((const char *, int from_script));
extern void lang_list_init PARAMS ((lang_statement_list_type*));
extern void lang_add_data PARAMS ((int type, union etree_union *));
extern void lang_add_reloc
  PARAMS ((bfd_reloc_code_real_type reloc, const reloc_howto_type *howto,
	   asection *section, const char *name, union etree_union *addend));
extern void lang_for_each_statement
  PARAMS ((void (*func) (lang_statement_union_type *)));
extern PTR stat_alloc PARAMS ((size_t size));
extern bfd_vma lang_size_sections
  PARAMS ((lang_statement_union_type *s,
	   lang_output_section_statement_type *output_section_statement,
	   lang_statement_union_type **prev, fill_type fill,
	   bfd_vma dot, boolean relax));

#endif