ld/ldlang.h

   1 /* ldlang.h - linker command language support
   2    Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
   3
   4    This file is part of GLD, the Gnu Linker.
   5
   6    GLD is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 1, or (at your option)
   9    any later version.
  10
  11    GLD is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GLD; see the file COPYING.  If not, write to
  18    the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef LDLANG_H
  21 #define LDLANG_H
  22
  23 typedef enum
  24 {
  25   lang_input_file_is_l_enum,
  26   lang_input_file_is_symbols_only_enum,
  27   lang_input_file_is_marker_enum,
  28   lang_input_file_is_fake_enum,
  29   lang_input_file_is_search_file_enum,
  30   lang_input_file_is_file_enum
  31 } lang_input_file_enum_type;
  32
  33 typedef unsigned int fill_type;
  34 typedef struct statement_list
  35 {
  36   union lang_statement_union *head;
  37   union lang_statement_union **tail;
  38 } lang_statement_list_type;
  39
  40
  41 typedef struct memory_region_struct
  42 {
  43   char *name;
  44   struct memory_region_struct *next;
  45   bfd_vma origin;
  46   bfd_size_type length;
  47   bfd_vma current;
  48   bfd_size_type old_length;
  49   int flags;
  50   boolean had_full_message;
  51 } lang_memory_region_type ;
  52
  53 typedef struct lang_statement_header_struct
  54 {
  55   union  lang_statement_union  *next;
  56   enum statement_enum
  57     {
  58       lang_output_section_statement_enum,
  59       lang_assignment_statement_enum,
  60       lang_input_statement_enum,
  61       lang_address_statement_enum,
  62       lang_wild_statement_enum,
  63       lang_input_section_enum,
  64       lang_object_symbols_statement_enum,
  65       lang_fill_statement_enum,
  66       lang_data_statement_enum,
  67       lang_reloc_statement_enum,
  68       lang_target_statement_enum,
  69       lang_output_statement_enum,
  70       lang_padding_statement_enum,
  71       lang_group_statement_enum,
  72
  73       lang_afile_asection_pair_statement_enum,
  74       lang_constructors_statement_enum
  75     } type;
  76 } lang_statement_header_type;
  77
  78
  79 typedef struct
  80 {
  81   lang_statement_header_type header;
  82   union etree_union *exp;
  83 } lang_assignment_statement_type;
  84
  85
  86 typedef struct lang_target_statement_struct
  87 {
  88   lang_statement_header_type header;
  89   const char *target;
  90 } lang_target_statement_type;
  91
  92
  93 typedef struct lang_output_statement_struct
  94 {
  95   lang_statement_header_type header;
  96   const char *name;
  97 } lang_output_statement_type;
  98
  99
 100 /* This structure holds a list of program headers describing segments
 101    in which this section should be placed.  */
 102
 103 struct lang_output_section_phdr_list
 104 {
 105   struct lang_output_section_phdr_list *next;
 106   const char *name;
 107   boolean used;
 108 };
 109
 110 typedef struct lang_output_section_statement_struct
 111 {
 112   lang_statement_header_type header;
 113   union etree_union *addr_tree;
 114   lang_statement_list_type children;
 115   const char *memspec;
 116   union lang_statement_union *next;
 117   const char *name;
 118
 119   boolean processed;
 120
 121   asection *bfd_section;
 122   int flags;                    /* Or together of all input sections */
 123   int loadable;                 /* set from NOLOAD flag in script */
 124   struct memory_region_struct *region;
 125   size_t block_value;
 126   fill_type fill;
 127
 128   int subsection_alignment;  /* alignment of components */
 129   int section_alignment;  /* alignment of start of section */
 130
 131   union etree_union *load_base;
 132
 133   struct lang_output_section_phdr_list *phdrs;
 134 } lang_output_section_statement_type;
 135
 136
 137 typedef struct
 138 {
 139   lang_statement_header_type header;
 140 } lang_common_statement_type;
 141
 142 typedef struct
 143 {
 144   lang_statement_header_type header;
 145 } lang_object_symbols_statement_type;
 146
 147 typedef struct
 148 {
 149   lang_statement_header_type header;
 150   fill_type fill;
 151   int size;
 152   asection *output_section;
 153 } lang_fill_statement_type;
 154
 155 typedef struct
 156 {
 157   lang_statement_header_type header;
 158   unsigned int type;
 159   union  etree_union *exp;
 160   bfd_vma value;
 161   asection *output_section;
 162   bfd_vma output_vma;
 163 } lang_data_statement_type;
 164
 165 /* Generate a reloc in the output file.  */
 166
 167 typedef struct
 168 {
 169   lang_statement_header_type header;
 170
 171   /* Reloc to generate.  */
 172   bfd_reloc_code_real_type reloc;
 173
 174   /* Reloc howto structure.  */
 175   reloc_howto_type *howto;
 176
 177   /* Section to generate reloc against.  Exactly one of section and
 178      name must be NULL.  */
 179   asection *section;
 180
 181   /* Name of symbol to generate reloc against.  Exactly one of section
 182      and name must be NULL.  */
 183   const char *name;
 184
 185   /* Expression for addend.  */
 186   union etree_union *addend_exp;
 187
 188   /* Resolved addend.  */
 189   bfd_vma addend_value;
 190
 191   /* Output section where reloc should be performed.  */
 192   asection *output_section;
 193
 194   /* VMA within output section.  */
 195   bfd_vma output_vma;
 196 } lang_reloc_statement_type;
 197
 198 typedef struct lang_input_statement_struct
 199 {
 200   lang_statement_header_type header;
 201   /* Name of this file.  */
 202   const char *filename;
 203   /* Name to use for the symbol giving address of text start */
 204   /* Usually the same as filename, but for a file spec'd with -l
 205      this is the -l switch itself rather than the filename.  */
 206   const char *local_sym_name;
 207
 208   bfd *the_bfd;
 209
 210   boolean closed;
 211   file_ptr passive_position;
 212
 213   /* Symbol table of the file.  */
 214   asymbol **asymbols;
 215   unsigned int symbol_count;
 216
 217   /* Point to the next file - whatever it is, wanders up and down
 218      archives */
 219
 220   union lang_statement_union  *next;
 221   /* Point to the next file, but skips archive contents */
 222   union  lang_statement_union  *next_real_file;
 223
 224   boolean is_archive;
 225
 226   /* 1 means search a set of directories for this file.  */
 227   boolean search_dirs_flag;
 228
 229   /* 1 means this is base file of incremental load.
 230      Do not load this file's text or data.
 231      Also default text_start to after this file's bss. */
 232
 233   boolean just_syms_flag;
 234
 235   /* Whether to search for this entry as a dynamic archive.  */
 236   boolean dynamic;
 237
 238   /* Whether to include the entire contents of an archive.  */
 239   boolean whole_archive;
 240
 241   boolean loaded;
 242
 243   /*    unsigned int globals_in_this_file;*/
 244   const char *target;
 245   boolean real;
 246   asection *common_section;
 247   asection *common_output_section;
 248   boolean complained;
 249 } lang_input_statement_type;
 250
 251 typedef struct
 252 {
 253   lang_statement_header_type header;
 254   asection *section;
 255   lang_input_statement_type *ifile;
 256
 257 } lang_input_section_type;
 258
 259
 260 typedef struct
 261 {
 262   lang_statement_header_type header;
 263   asection *section;
 264   union lang_statement_union *file;
 265 } lang_afile_asection_pair_statement_type;
 266
 267 typedef struct lang_wild_statement_struct
 268 {
 269   lang_statement_header_type header;
 270   const char *section_name;
 271   const char *filename;
 272   lang_statement_list_type children;
 273 } lang_wild_statement_type;
 274
 275 typedef struct lang_address_statement_struct
 276 {
 277   lang_statement_header_type header;
 278   const  char *section_name;
 279   union  etree_union *address;
 280 } lang_address_statement_type;
 281
 282 typedef struct
 283 {
 284   lang_statement_header_type header;
 285   bfd_vma output_offset;
 286   size_t size;
 287   asection *output_section;
 288   fill_type fill;
 289 } lang_padding_statement_type;
 290
 291 /* A group statement collects a set of libraries together.  The
 292    libraries are searched multiple times, until no new undefined
 293    symbols are found.  The effect is to search a group of libraries as
 294    though they were a single library.  */
 295
 296 typedef struct
 297 {
 298   lang_statement_header_type header;
 299   lang_statement_list_type children;
 300 } lang_group_statement_type;
 301
 302 typedef union lang_statement_union
 303 {
 304   lang_statement_header_type header;
 305   union lang_statement_union *next;
 306   lang_wild_statement_type wild_statement;
 307   lang_data_statement_type data_statement;
 308   lang_reloc_statement_type reloc_statement;
 309   lang_address_statement_type address_statement;
 310   lang_output_section_statement_type output_section_statement;
 311   lang_afile_asection_pair_statement_type afile_asection_pair_statement;
 312   lang_assignment_statement_type assignment_statement;
 313   lang_input_statement_type input_statement;
 314   lang_target_statement_type target_statement;
 315   lang_output_statement_type output_statement;
 316   lang_input_section_type input_section;
 317   lang_common_statement_type common_statement;
 318   lang_object_symbols_statement_type object_symbols_statement;
 319   lang_fill_statement_type fill_statement;
 320   lang_padding_statement_type padding_statement;
 321   lang_group_statement_type group_statement;
 322 } lang_statement_union_type;
 323
 324 /* This structure holds information about a program header, from the
 325    PHDRS command in the linker script.  */
 326
 327 struct lang_phdr
 328 {
 329   struct lang_phdr *next;
 330   const char *name;
 331   unsigned long type;
 332   boolean filehdr;
 333   boolean phdrs;
 334   etree_type *at;
 335   etree_type *flags;
 336 };
 337
 338 extern lang_output_section_statement_type *abs_output_section;
 339 extern boolean lang_has_input_file;
 340 extern etree_type *base;
 341 extern lang_statement_list_type *stat_ptr;
 342 extern boolean delete_output_file_on_failure;
 343
 344 extern const char *entry_symbol;
 345 extern boolean entry_from_cmdline;
 346
 347 extern void lang_init PARAMS ((void));
 348 extern struct memory_region_struct *lang_memory_region_lookup
 349   PARAMS ((const char *const));
 350 extern void lang_map PARAMS ((void));
 351 extern void lang_set_flags PARAMS ((int *, const char *));
 352 extern void lang_add_output PARAMS ((const char *, int from_script));
 353 extern void lang_enter_output_section_statement
 354   PARAMS ((const char *output_section_statement_name,
 355            etree_type * address_exp,
 356            int flags,
 357            bfd_vma block_value,
 358            etree_type *align,
 359            etree_type *subalign,
 360            etree_type *));
 361 extern void lang_final PARAMS ((void));
 362 extern void lang_process PARAMS ((void));
 363 extern void lang_section_start PARAMS ((const char *, union etree_union *));
 364 extern void lang_add_entry PARAMS ((const char *, boolean));
 365 extern void lang_add_target PARAMS ((const char *));
 366 extern void lang_add_wild PARAMS ((const char *const , const char *const));
 367 extern void lang_add_map PARAMS ((const char *));
 368 extern void lang_add_fill PARAMS ((int));
 369 extern void lang_add_assignment PARAMS ((union etree_union *));
 370 extern void lang_add_attribute PARAMS ((enum statement_enum));
 371 extern void lang_startup PARAMS ((const char *));
 372 extern void lang_float PARAMS ((enum bfd_boolean));
 373 extern void lang_leave_output_section_statement PARAMS ((bfd_vma,
 374                                                          const char *));
 375 extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
 376 extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
 377                                                      const char *));
 378 extern void lang_statement_append PARAMS ((struct statement_list *,
 379                                            union lang_statement_union *,
 380                                            union lang_statement_union **));
 381 extern void lang_for_each_input_file
 382   PARAMS ((void (*dothis) (lang_input_statement_type *)));
 383 extern void lang_for_each_file
 384   PARAMS ((void (*dothis) (lang_input_statement_type *)));
 385 extern bfd_vma lang_do_assignments
 386   PARAMS ((lang_statement_union_type * s,
 387            lang_output_section_statement_type *output_section_statement,
 388            fill_type fill,
 389            bfd_vma dot));
 390
 391 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                \
 392   extern lang_statement_list_type file_chain;                   \
 393   lang_input_statement_type *statement;                         \
 394   for (statement = (lang_input_statement_type *)file_chain.head;\
 395        statement != (lang_input_statement_type *)NULL;          \
 396        statement = (lang_input_statement_type *)statement->next)\
 397
 398 extern void lang_process PARAMS ((void));
 399 extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
 400 extern lang_output_section_statement_type *lang_output_section_find
 401   PARAMS ((const char * const));
 402 extern lang_input_statement_type *lang_add_input_file
 403   PARAMS ((const char *name, lang_input_file_enum_type file_type,
 404            const char *target));
 405 extern void lang_add_keepsyms_file PARAMS ((const char *filename));
 406 extern lang_output_section_statement_type *
 407   lang_output_section_statement_lookup PARAMS ((const char * const name));
 408 extern void ldlang_add_undef PARAMS ((const char *const name));
 409 extern void lang_add_output_format PARAMS ((const char *, const char *,
 410                                             const char *, int from_script));
 411 extern void lang_list_init PARAMS ((lang_statement_list_type*));
 412 extern void lang_add_data PARAMS ((int type, union etree_union *));
 413 extern void lang_add_reloc
 414   PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto,
 415            asection *section, const char *name, union etree_union *addend));
 416 extern void lang_for_each_statement
 417   PARAMS ((void (*func) (lang_statement_union_type *)));
 418 extern PTR stat_alloc PARAMS ((size_t size));
 419 extern bfd_vma lang_size_sections
 420   PARAMS ((lang_statement_union_type *s,
 421            lang_output_section_statement_type *output_section_statement,
 422            lang_statement_union_type **prev, fill_type fill,
 423            bfd_vma dot, boolean relax));
 424 extern void lang_enter_group PARAMS ((void));
 425 extern void lang_leave_group PARAMS ((void));
 426 extern void wild_doit
 427   PARAMS ((lang_statement_list_type *ptr, asection *section,
 428            lang_output_section_statement_type *output,
 429            lang_input_statement_type *file));
 430 extern void lang_new_phdr
 431   PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *,
 432            etree_type *));
 433 extern void lang_section_in_phdr PARAMS ((const char *));
 434
 435 #endif