ld/ldlang.h

   1 /* ldlang.h - linker command language support
   2    Copyright 1991, 1992, 1993 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, 675 Mass Ave, Cambridge, MA 02139, 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_target_statement_enum,
  68       lang_output_statement_enum,
  69       lang_padding_statement_enum,
  70
  71       lang_afile_asection_pair_statement_enum,
  72       lang_constructors_statement_enum
  73     } type;
  74 } lang_statement_header_type;
  75
  76
  77 typedef struct
  78 {
  79   lang_statement_header_type header;
  80   union etree_union *exp;
  81 } lang_assignment_statement_type;
  82
  83
  84 typedef struct lang_target_statement_struct
  85 {
  86   lang_statement_header_type header;
  87   const char *target;
  88 } lang_target_statement_type;
  89
  90
  91 typedef struct lang_output_statement_struct
  92 {
  93   lang_statement_header_type header;
  94   const char *name;
  95 } lang_output_statement_type;
  96
  97
  98 typedef struct lang_output_section_statement_struct
  99 {
 100   lang_statement_header_type header;
 101   union etree_union *addr_tree;
 102   lang_statement_list_type children;
 103   const char *memspec;
 104   union lang_statement_union *next;
 105   const char *name;
 106
 107   boolean processed;
 108
 109   asection *bfd_section;
 110   int flags;                    /* Or together of all input sections */
 111   int loadable;                 /* set from NOLOAD flag in script */
 112   struct memory_region_struct *region;
 113   size_t block_value;
 114   fill_type fill;
 115
 116   int subsection_alignment;  /* alignment of components */
 117   int section_alignment;  /* alignment of start of section */
 118
 119   union etree_union *load_base;
 120 } lang_output_section_statement_type;
 121
 122
 123 typedef struct
 124 {
 125   lang_statement_header_type header;
 126 } lang_common_statement_type;
 127
 128 typedef struct
 129 {
 130   lang_statement_header_type header;
 131 } lang_object_symbols_statement_type;
 132
 133 typedef struct
 134 {
 135   lang_statement_header_type header;
 136   fill_type fill;
 137   int size;
 138   asection *output_section;
 139 } lang_fill_statement_type;
 140
 141 typedef struct
 142 {
 143   lang_statement_header_type header;
 144   unsigned int type;
 145   union  etree_union *exp;
 146   bfd_vma value;
 147   asection *output_section;
 148   bfd_vma output_vma;
 149 } lang_data_statement_type;
 150
 151
 152
 153
 154 typedef struct lang_input_statement_struct
 155 {
 156   lang_statement_header_type header;
 157   /* Name of this file.  */
 158   const char *filename;
 159   /* Name to use for the symbol giving address of text start */
 160   /* Usually the same as filename, but for a file spec'd with -l
 161      this is the -l switch itself rather than the filename.  */
 162   const char *local_sym_name;
 163
 164   bfd *the_bfd;
 165
 166   boolean closed;
 167   file_ptr passive_position;
 168
 169   /* Symbol table of the file.  */
 170   asymbol **asymbols;
 171   unsigned int symbol_count;
 172
 173   /* For library members only */
 174
 175   /* For a library, points to chain of entries for the library members.  */
 176   struct lang_input_statement_struct *subfiles;
 177
 178   /* Size of contents of this file, if library member.  */
 179   bfd_size_type total_size;
 180
 181   /* For library member, points to the library's own entry.  */
 182   struct lang_input_statement_struct *superfile;
 183
 184   /* For library member, points to next entry for next member.  */
 185   struct lang_input_statement_struct *chain;
 186
 187   /* Point to the next file - whatever it is, wanders up and down
 188      archives */
 189
 190   union lang_statement_union  *next;
 191   /* Point to the next file, but skips archive contents */
 192   union  lang_statement_union  *next_real_file;
 193
 194   boolean is_archive;
 195
 196   /* 1 means search a set of directories for this file.  */
 197   boolean search_dirs_flag;
 198
 199   /* 1 means this is base file of incremental load.
 200      Do not load this file's text or data.
 201      Also default text_start to after this file's bss. */
 202
 203   boolean just_syms_flag;
 204
 205   boolean loaded;
 206
 207
 208   /*    unsigned int globals_in_this_file;*/
 209   const char *target;
 210   boolean real;
 211   asection *common_section;
 212   asection *common_output_section;
 213   boolean complained;
 214 } lang_input_statement_type;
 215
 216 typedef struct
 217 {
 218   lang_statement_header_type header;
 219   asection *section;
 220   lang_input_statement_type *ifile;
 221
 222 } lang_input_section_type;
 223
 224
 225 typedef struct
 226 {
 227   lang_statement_header_type header;
 228   asection *section;
 229   union lang_statement_union *file;
 230 } lang_afile_asection_pair_statement_type;
 231
 232 typedef struct lang_wild_statement_struct
 233 {
 234   lang_statement_header_type header;
 235   const char *section_name;
 236   const char *filename;
 237   lang_statement_list_type children;
 238 } lang_wild_statement_type;
 239
 240 typedef struct lang_address_statement_struct
 241 {
 242   lang_statement_header_type header;
 243   const  char *section_name;
 244   union  etree_union *address;
 245 } lang_address_statement_type;
 246
 247 typedef struct
 248 {
 249   lang_statement_header_type header;
 250   bfd_vma output_offset;
 251   size_t size;
 252   asection *output_section;
 253   fill_type fill;
 254 } lang_padding_statement_type;
 255
 256 typedef union lang_statement_union
 257 {
 258   lang_statement_header_type header;
 259   union lang_statement_union *next;
 260   lang_wild_statement_type wild_statement;
 261   lang_data_statement_type data_statement;
 262   lang_address_statement_type address_statement;
 263   lang_output_section_statement_type output_section_statement;
 264   lang_afile_asection_pair_statement_type afile_asection_pair_statement;
 265   lang_assignment_statement_type assignment_statement;
 266   lang_input_statement_type input_statement;
 267   lang_target_statement_type target_statement;
 268   lang_output_statement_type output_statement;
 269   lang_input_section_type input_section;
 270   lang_common_statement_type common_statement;
 271   lang_object_symbols_statement_type object_symbols_statement;
 272   lang_fill_statement_type fill_statement;
 273   lang_padding_statement_type padding_statement;
 274 } lang_statement_union_type;
 275
 276 extern bfd_size_type largest_section;
 277 extern lang_output_section_statement_type *abs_output_section;
 278 extern boolean lang_has_input_file;
 279 extern etree_type *base;
 280 extern lang_statement_list_type *stat_ptr;
 281 extern boolean delete_output_file_on_failure;
 282
 283 extern void lang_init PARAMS ((void));
 284 extern struct memory_region_struct *lang_memory_region_lookup
 285   PARAMS ((const char *const));
 286 extern void lang_map PARAMS ((void));
 287 extern void lang_set_flags PARAMS ((int *, const char *));
 288 extern void lang_add_output PARAMS ((const char *, int from_script));
 289 extern void lang_enter_output_section_statement
 290   PARAMS ((const char *output_section_statement_name,
 291            etree_type * address_exp,
 292            int flags,
 293            bfd_vma block_value,
 294            etree_type *align,
 295            etree_type *subalign,
 296            etree_type *));
 297 extern void lang_final PARAMS ((void));
 298 extern void lang_process PARAMS ((void));
 299 extern void lang_section_start PARAMS ((const char *, union etree_union *));
 300 extern void lang_add_entry PARAMS ((const char *));
 301 extern void lang_add_target PARAMS ((const char *));
 302 extern void lang_add_wild PARAMS ((const char *const , const char *const));
 303 extern void lang_add_map PARAMS ((const char *));
 304 extern void lang_add_fill PARAMS ((int));
 305 extern void lang_add_assignment PARAMS ((union etree_union *));
 306 extern void lang_add_attribute PARAMS ((enum statement_enum));
 307 extern void lang_startup PARAMS ((const char *));
 308 extern void lang_float PARAMS ((enum bfd_boolean));
 309 extern void lang_leave_output_section_statement PARAMS ((bfd_vma,
 310                                                          const char *));
 311 extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
 312 extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
 313                                                      const char *));
 314 extern void lang_statement_append PARAMS ((struct statement_list *,
 315                                            union lang_statement_union *,
 316                                            union lang_statement_union **));
 317 extern void lang_for_each_file
 318   PARAMS ((void (*dothis) (lang_input_statement_type *)));
 319
 320 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)                \
 321   extern lang_statement_list_type file_chain;                   \
 322   lang_input_statement_type *statement;                         \
 323   for (statement = (lang_input_statement_type *)file_chain.head;\
 324        statement != (lang_input_statement_type *)NULL;          \
 325        statement = (lang_input_statement_type *)statement->next)\
 326
 327 #define LANG_FOR_EACH_INPUT_SECTION(statement, abfd, section, x)        \
 328   {                                                                     \
 329     extern lang_statement_list_type file_chain;                         \
 330     lang_input_statement_type *statement;                               \
 331     for (statement = (lang_input_statement_type *)file_chain.head;      \
 332          statement != (lang_input_statement_type *)NULL;                \
 333          statement = (lang_input_statement_type *)statement->next)      \
 334       {                                                                 \
 335         asection *section;                                              \
 336         bfd *abfd = statement->the_bfd;                                 \
 337         for (section = abfd->sections;                                  \
 338              section != (asection *)NULL;                               \
 339              section = section->next)                                   \
 340           {                                                             \
 341             x;                                                          \
 342           }                                                             \
 343       }                                                                 \
 344   }
 345
 346 #define LANG_FOR_EACH_OUTPUT_SECTION(section, x)                \
 347   {                                                             \
 348     extern bfd *output_bfd;                                     \
 349     asection *section;                                          \
 350     for (section = output_bfd->sections;                        \
 351          section != (asection *)NULL;                           \
 352          section = section->next)                               \
 353       {                                                         \
 354         x;                                                      \
 355       }                                                         \
 356   }
 357
 358 extern void lang_process PARAMS ((void));
 359 extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
 360 extern lang_output_section_statement_type *lang_output_section_find
 361   PARAMS ((const char * const));
 362 extern lang_input_statement_type *lang_add_input_file
 363   PARAMS ((const char *name, lang_input_file_enum_type file_type,
 364            const char *target));
 365 extern void lang_add_keepsyms_file PARAMS ((const char *filename));
 366 extern lang_output_section_statement_type *
 367   lang_output_section_statement_lookup PARAMS ((const char * const name));
 368 extern void ldlang_add_undef PARAMS ((const char *const name));
 369 extern void lang_add_output_format PARAMS ((const char *, int from_script));
 370 extern void lang_list_init PARAMS ((lang_statement_list_type*));
 371 extern void lang_add_data PARAMS ((int type, union etree_union *));
 372 extern void lang_for_each_statement
 373   PARAMS ((void (*func) (lang_statement_union_type *)));
 374 extern PTR stat_alloc PARAMS ((size_t size));
 375
 376 #endif