ld/ldlang.h

   1 /* ldlang.h -
   2
   3    Copyright (C) 1991 Free Software Foundation, Inc.
   4
   5    This file is part of GLD, the Gnu Linker.
   6
   7    GLD is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 1, or (at your option)
  10    any later version.
  11
  12    GLD is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GLD; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 typedef enum {
  23   lang_input_file_is_l_enum,
  24   lang_input_file_is_symbols_only_enum,
  25   lang_input_file_is_marker_enum,
  26   lang_input_file_is_fake_enum,
  27 lang_input_file_is_search_file_enum,
  28   lang_input_file_is_file_enum } lang_input_file_enum_type;
  29
  30 typedef unsigned short fill_type;
  31 typedef struct statement_list {
  32   union lang_statement_union *head;
  33   union lang_statement_union **tail;
  34 } lang_statement_list_type;
  35
  36
  37 typedef struct {
  38   boolean flag_read;
  39   boolean flag_write;
  40   boolean flag_executable;
  41   boolean flag_loadable;
  42 } lang_section_flags_type;
  43
  44 typedef struct memory_region_struct {
  45   char *name;
  46   struct memory_region_struct *next;
  47   bfd_vma origin;
  48   bfd_offset length;
  49   bfd_vma current;
  50   lang_section_flags_type flags;
  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     lang_output_section_statement_enum,
  58     lang_assignment_statement_enum,
  59     lang_input_statement_enum,
  60     lang_address_statement_enum,
  61     lang_wild_statement_enum,
  62     lang_input_section_enum,
  63     lang_common_statement_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   } type;
  73
  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   lang_statement_header_type header;
  86   char *target;
  87 } lang_target_statement_type;
  88
  89
  90 typedef struct lang_output_statement_struct {
  91   lang_statement_header_type header;
  92   char *name;
  93 } lang_output_statement_type;
  94
  95
  96 typedef struct lang_output_section_statement_struct
  97 {
  98   lang_statement_header_type header;
  99   union etree_union *addr_tree;
 100   lang_statement_list_type children;
 101   char *memspec;
 102   union lang_statement_union *next;
 103   char *name;
 104   unsigned long subsection_alignment;
 105   boolean processed;
 106
 107   asection *bfd_section;
 108   lang_section_flags_type flags;
 109   struct memory_region_struct *region;
 110   size_t block_value;
 111   fill_type fill;
 112 } lang_output_section_statement_type;
 113
 114
 115 typedef struct {
 116   lang_statement_header_type header;
 117 } lang_common_statement_type;
 118
 119 typedef struct {
 120   lang_statement_header_type header;
 121 } lang_object_symbols_statement_type;
 122
 123 typedef struct {
 124   lang_statement_header_type header;
 125 fill_type fill;
 126 } lang_fill_statement_type;
 127
 128 typedef struct {
 129   lang_statement_header_type header;
 130   unsigned int type;
 131   union  etree_union *exp;
 132   bfd_vma value;
 133   asection *output_section;
 134   bfd_vma output_vma;
 135 } lang_data_statement_type;
 136
 137
 138
 139
 140 typedef struct lang_input_statement_struct
 141   {
 142     lang_statement_header_type header;
 143     /* Name of this file.  */
 144     char *filename;
 145     /* Name to use for the symbol giving address of text start */
 146     /* Usually the same as filename, but for a file spec'd with -l
 147        this is the -l switch itself rather than the filename.  */
 148     char *local_sym_name;
 149
 150     /* Describe the layout of the contents of the file */
 151
 152     /* The file's a.out header.  */
 153     /*  struct exec header;*/
 154     /* Offset in file of GDB symbol segment, or 0 if there is none.  */
 155     int symseg_offset;
 156
 157     /* Describe data from the file loaded into core */
 158
 159     bfd *the_bfd;
 160
 161     boolean closed;
 162     file_ptr passive_position;
 163
 164     /* Symbol table of the file.  */
 165     asymbol **asymbols;
 166     unsigned int symbol_count;
 167
 168     /* Next two used only if `relocatable_output' or if needed for */
 169     /* output of undefined reference line numbers. */
 170     /* Text reloc info saved by `write_text' for `coptxtrel'.  */
 171
 172
 173     /* Offset in bytes in the output file symbol table
 174        of the first local symbol for this file.  Set by `write_file_symbols'.  */
 175     int local_syms_offset;
 176
 177     /* For library members only */
 178
 179     /* For a library, points to chain of entries for the library members.  */
 180     struct lang_input_statement_struct *subfiles;
 181     /* For a library member, offset of the member within the archive.
 182        Zero for files that are not library members.  */
 183     /*  int starting_offset;*/
 184     /* Size of contents of this file, if library member.  */
 185     int total_size;
 186     /* For library member, points to the library's own entry.  */
 187     struct lang_input_statement_struct *superfile;
 188     /* For library member, points to next entry for next member.  */
 189     struct lang_input_statement_struct *chain;
 190     /* Point to the next file - whatever it is, wanders up and down archives */
 191     union lang_statement_union  *next;
 192     /* Point to the next file, but skips archive contents */
 193     union  lang_statement_union  *next_real_file;
 194
 195     boolean is_archive;
 196
 197     /* 1 if file's header has been read into this structure.  */
 198     boolean header_read_flag;
 199
 200     /* 1 means search a set of directories for this file.  */
 201     boolean search_dirs_flag;
 202
 203     /* 1 means this is base file of incremental load.
 204        Do not load this file's text or data.
 205        Also default text_start to after this file's bss. */
 206     boolean just_syms_flag;
 207
 208     boolean loaded;
 209
 210
 211     /*    unsigned int globals_in_this_file;*/
 212     char *target;
 213     boolean real;
 214
 215     asection *common_section;
 216     asection *common_output_section;
 217   } lang_input_statement_type;
 218
 219 typedef struct {
 220   lang_statement_header_type header;
 221   asection *section;
 222   lang_input_statement_type *ifile;
 223 } lang_input_section_type;
 224
 225
 226 typedef struct {
 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   lang_statement_header_type header;
 234   char *section_name;
 235   char *filename;
 236   lang_statement_list_type children;
 237 } lang_wild_statement_type;
 238
 239 typedef struct lang_address_statement_struct {
 240   lang_statement_header_type header;
 241   char *section_name;
 242   union  etree_union *address;
 243 } lang_address_statement_type;
 244
 245 typedef struct {
 246   lang_statement_header_type header;
 247   bfd_vma output_offset;
 248   size_t size;
 249   asection *output_section;
 250   fill_type fill;
 251 } lang_padding_statement_type;
 252
 253 typedef union lang_statement_union
 254 {
 255   lang_statement_header_type header;
 256   union lang_statement_union *next;
 257   lang_wild_statement_type wild_statement;
 258   lang_data_statement_type data_statement;
 259   lang_address_statement_type address_statement;
 260   lang_output_section_statement_type output_section_statement;
 261   lang_afile_asection_pair_statement_type afile_asection_pair_statement;
 262   lang_assignment_statement_type assignment_statement;
 263   lang_input_statement_type input_statement;
 264   lang_target_statement_type target_statement;
 265   lang_output_statement_type output_statement;
 266   lang_input_section_type input_section;
 267   lang_common_statement_type common_statement;
 268   lang_object_symbols_statement_type object_symbols_statement;
 269   lang_fill_statement_type fill_statement;
 270   lang_padding_statement_type padding_statement;
 271 } lang_statement_union_type;
 272
 273
 274
 275 PROTO(void,lang_init,(void));
 276 PROTO(struct memory_region_struct ,*lang_memory_region_lookup,(char *));
 277 PROTO(struct lang_output_section_statement_struct *,lang_output_section_find,(char *));
 278
 279 PROTO(void ,lang_map,(struct _iobuf *));
 280 PROTO(void,lang_set_flags,(lang_section_flags_type *, char *));
 281 PROTO(void,lang_add_output,(char *));
 282
 283 PROTO(void,lang_final,(void));
 284 PROTO(struct symbol_cache_entry *,create_symbol,(char *, unsigned int, struct sec_struct *));
 285 PROTO(void ,lang_process,(void));
 286 PROTO(void ,lang_section_start,(char *, union etree_union *));
 287 PROTO(void,lang_add_entry,(char *));
 288 PROTO(void,lang_add_target,(char *));
 289 PROTO(void,lang_add_wild,(char *, char *));
 290 PROTO(void,lang_add_map,(char *));
 291 PROTO(void,lang_add_fill,(int));
 292 PROTO(void,lang_add_assignment,(union etree_union *));
 293 PROTO(void,lang_add_attribute,(enum statement_enum));
 294 PROTO(void,lang_startup,(char *));
 295 PROTO(void,lang_float,(enum boolean));
 296 PROTO(void,lang_leave_output_section_statement,(bfd_vma, char *));
 297 PROTO(void,lang_abs_symbol_at_end_of,(char *, char *));
 298 PROTO(void,lang_statement_append,(struct statement_list *, union lang_statement_union *, union lang_statement_union **));
 299 PROTO(void, lang_for_each_file,(void (*dothis)(lang_input_statement_type *)));
 300
 301 #define LANG_FOR_EACH_ASYMBOL(asymbol) \
 302
 303 #define LANG_FOR_EACH_INPUT_STATEMENT(statement)               \
 304   extern lang_statement_list_type file_chain;                   \
 305   lang_input_statement_type *statement;                         \
 306   for (statement = (lang_input_statement_type *)file_chain.head;\
 307        statement != (lang_input_statement_type *)NULL;          \
 308        statement = (lang_input_statement_type *)statement->next)\
 309
 310 #define LANG_FOR_EACH_INPUT_SECTION(statement, abfd, section, x) \
 311 { extern lang_statement_list_type file_chain;                   \
 312   lang_input_statement_type *statement;                         \
 313   for (statement = (lang_input_statement_type *)file_chain.head;\
 314        statement != (lang_input_statement_type *)NULL;          \
 315        statement = (lang_input_statement_type *)statement->next)\
 316     {                                                           \
 317       asection *section;                                        \
 318       bfd *abfd = statement->the_bfd;                           \
 319       for (section = abfd->sections;                            \
 320            section != (asection *)NULL;                         \
 321            section = section->next) {                           \
 322         x;                                                      \
 323       }                                                         \
 324     }                                                           \
 325  }
 326
 327 #define LANG_FOR_EACH_OUTPUT_SECTION(section, x)                \
 328  { extern bfd *output_bfd;                                      \
 329    asection *section;                                           \
 330    for (section = output_bfd->sections;                         \
 331         section != (asection *)NULL;                            \
 332         section = section->next)                                \
 333         { x; }                                                  \
 334  }
 335
 336
 337 PROTO(void, lang_process,(void));
 338 PROTO(void, ldlang_add_file,(lang_input_statement_type *));
 339
 340 PROTO(lang_output_section_statement_type *,lang_output_section_find,());
 341
 342 PROTO(lang_input_statement_type *,
 343        lang_add_input_file,(char *name,
 344                             lang_input_file_enum_type file_type,
 345                             char *target));
 346 PROTO(lang_output_section_statement_type *,
 347 lang_output_section_statement_lookup,(char *name));