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 typedef struct lang_output_section_statement_struct
 101 {
 102   lang_statement_header_type header;
 103   union etree_union *addr_tree;
 104   lang_statement_list_type children;
 105   const char *memspec;
 106   union lang_statement_union *next;
 107   const char *name;
 108
 109   boolean processed;
 110
 111   asection *bfd_section;
 112   int flags;                    /* Or together of all input sections */
 113   int loadable;                 /* set from NOLOAD flag in script */
 114   struct memory_region_struct *region;
 115   size_t block_value;
 116   fill_type fill;
 117
 118   int subsection_alignment;  /* alignment of components */
 119   int section_alignment;  /* alignment of start of section */
 120
 121   union etree_union *load_base;
 122 } lang_output_section_statement_type;
 123
 124
 125 typedef struct
 126 {
 127   lang_statement_header_type header;
 128 } lang_common_statement_type;
 129
 130 typedef struct
 131 {
 132   lang_statement_header_type header;
 133 } lang_object_symbols_statement_type;
 134
 135 typedef struct
 136 {
 137   lang_statement_header_type header;
 138   fill_type fill;
 139   int size;
 140   asection *output_section;
 141 } lang_fill_statement_type;
 142
 143 typedef struct
 144 {
 145   lang_statement_header_type header;
 146   unsigned int type;
 147   union  etree_union *exp;
 148   bfd_vma value;
 149   asection *output_section;
 150   bfd_vma output_vma;
 151 } lang_data_statement_type;
 152
 153 /* Generate a reloc in the output file.  */
 154
 155 typedef struct
 156 {
 157   lang_statement_header_type header;
 158
 159   /* Reloc to generate.  */
 160   bfd_reloc_code_real_type reloc;
 161
 162   /* Reloc howto structure.  */
 163   reloc_howto_type *howto;
 164
 165   /* Section to generate reloc against.  Exactly one of section and
 166      name must be NULL.  */
 167   asection *section;
 168
 169   /* Name of symbol to generate reloc against.  Exactly one of section
 170      and name must be NULL.  */
 171   const char *name;
 172
 173   /* Expression for addend.  */
 174   union etree_union *addend_exp;
 175
 176   /* Resolved addend.  */
 177   bfd_vma addend_value;
 178
 179   /* Output section where reloc should be performed.  */
 180   asection *output_section;
 181
 182   /* VMA within output section.  */
 183   bfd_vma output_vma;
 184 } lang_reloc_statement_type;
 185
 186 typedef struct lang_input_statement_struct
 187 {
 188   lang_statement_header_type header;
 189   /* Name of this file.  */
 190   const char *filename;
 191   /* Name to use for the symbol giving address of text start */
 192   /* Usually the same as filename, but for a file spec'd with -l
 193      this is the -l switch itself rather than the filename.  */
 194   const char *local_sym_name;
 195
 196   bfd *the_bfd;
 197
 198   boolean closed;
 199   file_ptr passive_position;
 200
 201   /* Symbol table of the file.  */
 202   asymbol **asymbols;
 203   unsigned int symbol_count;
 204
 205   /* Point to the next file - whatever it is, wanders up and down
 206      archives */
 207
 208   union lang_statement_union  *next;
 209   /* Point to the next file, but skips archive contents */
 210   union  lang_statement_union  *next_real_file;
 211
 212   boolean is_archive;
 213
 214   /* 1 means search a set of directories for this file.  */
 215   boolean search_dirs_flag;
 216
 217   /* 1 means this is base file of incremental load.
 218      Do not load this file's text or data.
 219      Also default text_start to after this file's bss. */
 220
 221   boolean just_syms_flag;
 222
 223   boolean loaded;
 224
 225
 226   /*    unsigned int globals_in_this_file;*/
 227   const char *target;
 228   boolean real;
 229   asection *common_section;
 230   asection *common_output_section;
 231   boolean complained;
 232 } lang_input_statement_type;
 233
 234 typedef struct
 235 {
 236   lang_statement_header_type header;
 237   asection *section;
 238   lang_input_statement_type *ifile;
 239
 240 } lang_input_section_type;
 241
 242
 243 typedef struct
 244 {
 245   lang_statement_header_type header;
 246   asection *section;
 247   union lang_statement_union *file;
 248 } lang_afile_asection_pair_statement_type;
 249
 250 typedef struct lang_wild_statement_struct
 251 {
 252   lang_statement_header_type header;
 253   const char *section_name;
 254   const char *filename;
 255   lang_statement_list_type children;
 256 } lang_wild_statement_type;
 257
 258 typedef struct lang_address_statement_struct
 259 {
 260   lang_statement_header_type header;
 261   const  char *section_name;
 262   union  etree_union *address;
 263 } lang_address_statement_type;
 264
 265 typedef struct
 266 {
 267   lang_statement_header_type header;
 268   bfd_vma output_offset;
 269   size_t size;
 270   asection *output_section;
 271   fill_type fill;
 272 } lang_padding_statement_type;
 273
 274 /* A group statement collects a set of libraries together.  The
 275    libraries are searched multiple times, until no new undefined
 276    symbols are found.  The effect is to search a group of libraries as
 277    though they were a single library.  */
 278
 279 typedef struct
 280 {
 281   lang_statement_header_type header;
 282   lang_statement_list_type children;
 283 } lang_group_statement_type;
 284
 285 typedef union lang_statement_union
 286 {
 287   lang_statement_header_type header;
 288   union lang_statement_union *next;
 289   lang_wild_statement_type wild_statement;
 290   lang_data_statement_type data_statement;
 291   lang_reloc_statement_type reloc_statement;
 292   lang_address_statement_type address_statement;
 293   lang_output_section_statement_type output_section_statement;
 294   lang_afile_asection_pair_statement_type afile_asection_pair_statement;
 295   lang_assignment_statement_type assignment_statement;
 296   lang_input_statement_type input_statement;
 297   lang_target_statement_type target_statement;
 298   lang_output_statement_type output_statement;
 299   lang_input_section_type input_section;
 300   lang_common_statement_type common_statement;
 301   lang_object_symbols_statement_type object_symbols_statement;
 302   lang_fill_statement_type fill_statement;
 303   lang_padding_statement_type padding_statement;
 304   lang_group_statement_type group_statement;
 305 } lang_statement_union_type;
 306
 307 extern lang_output_section_statement_type *abs_output_section;
 308 extern boolean lang_has_input_file;
 309 extern etree_type *base;
 310 extern lang_statement_list_type *stat_ptr;
 311 extern boolean delete_output_file_on_failure;
 312
 313 extern void lang_init PARAMS ((void));
 314 extern struct memory_region_struct *lang_memory_region_lookup
 315   PARAMS ((const char *const));
 316 extern void lang_map PARAMS ((void));
 317 extern void lang_set_flags PARAMS ((int *, const char *));
 318 extern void lang_add_output PARAMS ((const char *, int from_script));
 319 extern void lang_enter_output_section_statement
 320   PARAMS ((const char *output_section_statement_name,
 321            etree_type * address_exp,
 322            int flags,
 323            bfd_vma block_value,
 324            etree_type *align,
 325            etree_type *subalign,
 326            etree_type *));
 327 extern void lang_final PARAMS ((void));
 328 extern void lang_process PARAMS ((void));
 329 extern void lang_section_start PARAMS ((const char *, union etree_union *));
 330 extern void lang_add_entry PARAMS ((const char *, int));
 331 extern void lang_add_target PARAMS ((const char *));
 332 extern void lang_add_wild PARAMS ((const char *const , const char *const));
 333 extern void lang_add_map PARAMS ((const char *));
 334 extern void lang_add_fill PARAMS ((int));
 335 extern void lang_add_assignment PARAMS ((union etree_union *));
 336 extern void lang_add_attribute PARAMS ((enum statement_enum));
 337 extern void lang_startup PARAMS ((const char *));
 338 extern void lang_float PARAMS ((enum bfd_boolean));
 339 extern void lang_leave_output_section_statement PARAMS ((bfd_vma,
 340                                                          const char *));
 341 extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
 342 extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
 343                                                      const char *));
 344 extern void lang_statement_append PARAMS ((struct statement_list *,
 345                                            union lang_statement_union *,
 346                                            union lang_statement_union **));
 347 extern void lang_for_each_input_file
 348   PARAMS ((void (*dothis) (lang_input_statement_type *)));
 349 extern void lang_for_each_file
 350   PARAMS ((void (*dothis) (lang_input_statement_type *)));
 351 extern bfd_vma lang_do_assignments
 352   PARAMS ((lang_statement_union_type * s,
 353            lang_output_section_statement_type *output_section_statement,
 354            fill_type fill,
 355            bfd_vma dot));
 356
 357 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                \
 358   extern lang_statement_list_type file_chain;                   \
 359   lang_input_statement_type *statement;                         \
 360   for (statement = (lang_input_statement_type *)file_chain.head;\
 361        statement != (lang_input_statement_type *)NULL;          \
 362        statement = (lang_input_statement_type *)statement->next)\
 363
 364 extern void lang_process PARAMS ((void));
 365 extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
 366 extern lang_output_section_statement_type *lang_output_section_find
 367   PARAMS ((const char * const));
 368 extern lang_input_statement_type *lang_add_input_file
 369   PARAMS ((const char *name, lang_input_file_enum_type file_type,
 370            const char *target));
 371 extern void lang_add_keepsyms_file PARAMS ((const char *filename));
 372 extern lang_output_section_statement_type *
 373   lang_output_section_statement_lookup PARAMS ((const char * const name));
 374 extern void ldlang_add_undef PARAMS ((const char *const name));
 375 extern void lang_add_output_format PARAMS ((const char *, const char *,
 376                                             const char *, int from_script));
 377 extern void lang_list_init PARAMS ((lang_statement_list_type*));
 378 extern void lang_add_data PARAMS ((int type, union etree_union *));
 379 extern void lang_add_reloc
 380   PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto,
 381            asection *section, const char *name, union etree_union *addend));
 382 extern void lang_for_each_statement
 383   PARAMS ((void (*func) (lang_statement_union_type *)));
 384 extern PTR stat_alloc PARAMS ((size_t size));
 385 extern bfd_vma lang_size_sections
 386   PARAMS ((lang_statement_union_type *s,
 387            lang_output_section_statement_type *output_section_statement,
 388            lang_statement_union_type **prev, fill_type fill,
 389            bfd_vma dot, boolean relax));
 390 extern void lang_enter_group PARAMS ((void));
 391 extern void lang_leave_group PARAMS ((void));
 392 extern void wild_doit
 393   PARAMS ((lang_statement_list_type *ptr, asection *section,
 394            lang_output_section_statement_type *output,
 395            lang_input_statement_type *file));
 396
 397 #endif