1/* BFD ECOFF object file private structure. 2 Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 5 6This file is part of BFD, the Binary File Descriptor library. 7 8This program is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2 of the License, or 11(at your option) any later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program; if not, write to the Free Software 20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21 22#include "bfdlink.h" 23 24#ifndef ECOFF_H 25#include "coff/ecoff.h" 26#endif 27 28/* This is the backend information kept for ECOFF files. This 29 structure is constant for a particular backend. The first element 30 is the COFF backend data structure, so that ECOFF targets can use 31 the generic COFF code. */ 32 33#define ecoff_backend(abfd) \ 34 ((struct ecoff_backend_data *) (abfd)->xvec->backend_data) 35 36struct ecoff_backend_data 37{ 38 /* COFF backend information. This must be the first field. */ 39 bfd_coff_backend_data coff; 40 /* Supported architecture. */ 41 enum bfd_architecture arch; 42 /* Initial portion of armap string. */ 43 const char *armap_start; 44 /* The page boundary used to align sections in a demand-paged 45 executable file. E.g., 0x1000. */ 46 bfd_vma round; 47 /* TRUE if the .rdata section is part of the text segment, as on the 48 Alpha. FALSE if .rdata is part of the data segment, as on the 49 MIPS. */ 50 bfd_boolean rdata_in_text; 51 /* Bitsize of constructor entries. */ 52 unsigned int constructor_bitsize; 53 /* Reloc to use for constructor entries. */ 54 reloc_howto_type *constructor_reloc; 55 /* How to swap debugging information. */ 56 struct ecoff_debug_swap debug_swap; 57 /* External reloc size. */ 58 bfd_size_type external_reloc_size; 59 /* Reloc swapping functions. */ 60 void (*swap_reloc_in) PARAMS ((bfd *, PTR, struct internal_reloc *)); 61 void (*swap_reloc_out) PARAMS ((bfd *, const struct internal_reloc *, PTR)); 62 /* Backend reloc tweaking. */ 63 void (*adjust_reloc_in) 64 PARAMS ((bfd *, const struct internal_reloc *, arelent *)); 65 void (*adjust_reloc_out) 66 PARAMS ((bfd *, const arelent *, struct internal_reloc *)); 67 /* Relocate section contents while linking. */ 68 bfd_boolean (*relocate_section) 69 PARAMS ((bfd *output_bfd, struct bfd_link_info *, bfd *input_bfd, 70 asection *input_section, bfd_byte *contents, 71 PTR external_relocs)); 72 /* Do final adjustments to filehdr and aouthdr. */ 73 bfd_boolean (*adjust_headers) 74 PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *)); 75 /* Read an element from an archive at a given file position. This 76 is needed because OSF/1 3.2 uses a weird archive format. */ 77 bfd *(*get_elt_at_filepos) PARAMS ((bfd *, file_ptr)); 78}; 79 80/* This is the target specific information kept for ECOFF files. */ 81 82#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data) 83 84typedef struct ecoff_tdata 85{ 86 /* The reloc file position, set by 87 ecoff_compute_section_file_positions. */ 88 file_ptr reloc_filepos; 89 90 /* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */ 91 file_ptr sym_filepos; 92 93 /* The start and end of the text segment. Only valid for an 94 existing file, not for one we are creating. */ 95 unsigned long text_start; 96 unsigned long text_end; 97 98 /* The cached gp value. This is used when relocating. */ 99 bfd_vma gp; 100 101 /* The maximum size of objects to optimize using gp. This is 102 typically set by the -G option to the compiler, assembler or 103 linker. */ 104 unsigned int gp_size; 105 106 /* The register masks. When linking, all the masks found in the 107 input files are combined into the masks of the output file. 108 These are not all used for all targets, but that's OK, because 109 the relevant ones are the only ones swapped in and out. */ 110 unsigned long gprmask; 111 unsigned long fprmask; 112 unsigned long cprmask[4]; 113 114 /* The ECOFF symbolic debugging information. */ 115 struct ecoff_debug_info debug_info; 116 117 /* The unswapped ECOFF symbolic information. */ 118 PTR raw_syments; 119 120 /* The canonical BFD symbols. */ 121 struct ecoff_symbol_struct *canonical_symbols; 122 123 /* A mapping from external symbol numbers to entries in the linker 124 hash table, used when linking. */ 125 struct ecoff_link_hash_entry **sym_hashes; 126 127 /* A mapping from reloc symbol indices to sections, used when 128 linking. */ 129 asection **symndx_to_section; 130 131 /* TRUE if this BFD was written by the backend linker. */ 132 bfd_boolean linker; 133 134 /* TRUE if a warning that multiple global pointer values are 135 needed in the output binary was issued already. */ 136 bfd_boolean issued_multiple_gp_warning; 137 138 /* Used by find_nearest_line entry point. The structure could be 139 included directly in this one, but there's no point to wasting 140 the memory just for the infrequently called find_nearest_line. */ 141 struct ecoff_find_line *find_line_info; 142 143 /* Whether the .rdata section is in the text segment for this 144 particular ECOFF file. This is not valid until 145 ecoff_compute_section_file_positions is called. */ 146 bfd_boolean rdata_in_text; 147 148} ecoff_data_type; 149 150/* Each canonical asymbol really looks like this. */ 151 152typedef struct ecoff_symbol_struct 153{ 154 /* The actual symbol which the rest of BFD works with */ 155 asymbol symbol; 156 157 /* The fdr for this symbol. */ 158 FDR *fdr; 159 160 /* TRUE if this is a local symbol rather than an external one. */ 161 bfd_boolean local; 162 163 /* A pointer to the unswapped hidden information for this symbol. 164 This is either a struct sym_ext or a struct ext_ext, depending on 165 the value of the local field above. */ 166 PTR native; 167} ecoff_symbol_type; 168 169/* We take the address of the first element of an asymbol to ensure that the 170 macro is only ever applied to an asymbol. */ 171#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd))) 172 173/* We need to save the index of an external symbol when we write it 174 out so that can set the symbol index correctly when we write out 175 the relocs. */ 176#define ecoff_get_sym_index(symbol) ((symbol)->udata.i) 177#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx)) 178 179/* A pointer to this structure is put in the used_by_bfd pointer of 180 a section to keep track of any per-section data. 181 The user_by_bfd pointer will be NULL if the information was not 182 needed. */ 183 184struct ecoff_section_tdata 185{ 186 /* When producing an executable (i.e., final, non-relocatable link) 187 on the Alpha, we may need to use multiple global pointer values 188 to span the entire .lita section. In essence, we allow each 189 input .lita section to have its own gp value. To support this, 190 we need to keep track of the gp values that we picked for each 191 input .lita section . */ 192 bfd_vma gp; 193}; 194 195/* An accessor macro for the ecoff_section_tdata structure. */ 196#define ecoff_section_data(abfd, sec) \ 197 ((struct ecoff_section_tdata *) (sec)->used_by_bfd) 198 199/* ECOFF linker hash table entries. */ 200 201struct ecoff_link_hash_entry 202{ 203 struct bfd_link_hash_entry root; 204 /* Symbol index in output file. */ 205 long indx; 206 /* BFD that ext field value came from. */ 207 bfd *abfd; 208 /* ECOFF external symbol information. */ 209 EXTR esym; 210 /* Nonzero if this symbol has been written out. */ 211 char written; 212 /* Nonzero if this symbol was referred to as small undefined. */ 213 char small; 214}; 215 216/* ECOFF linker hash table. */ 217 218struct ecoff_link_hash_table 219{ 220 struct bfd_link_hash_table root; 221}; 222 223/* Make an ECOFF object. */ 224extern bfd_boolean _bfd_ecoff_mkobject PARAMS ((bfd *)); 225 226/* Read in the ECOFF symbolic debugging information. */ 227extern bfd_boolean _bfd_ecoff_slurp_symbolic_info 228 PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); 229 230/* Generic ECOFF BFD backend vectors. */ 231 232extern bfd_boolean _bfd_ecoff_write_object_contents PARAMS ((bfd *abfd)); 233extern const bfd_target *_bfd_ecoff_archive_p PARAMS ((bfd *abfd)); 234 235#define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup 236#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 237extern bfd_boolean _bfd_ecoff_new_section_hook 238 PARAMS ((bfd *, asection *)); 239extern bfd_boolean _bfd_ecoff_get_section_contents 240 PARAMS ((bfd *, asection *, PTR location, file_ptr, bfd_size_type)); 241 242#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section 243 244extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data 245 PARAMS ((bfd *, bfd *)); 246#define _bfd_ecoff_bfd_copy_private_section_data \ 247 _bfd_generic_bfd_copy_private_section_data 248 249#define _bfd_ecoff_bfd_copy_private_symbol_data \ 250 _bfd_generic_bfd_copy_private_symbol_data 251 252#define _bfd_ecoff_bfd_copy_private_header_data \ 253 _bfd_generic_bfd_copy_private_header_data 254 255#define _bfd_ecoff_bfd_print_private_bfd_data \ 256 _bfd_generic_bfd_print_private_bfd_data 257 258#define _bfd_ecoff_bfd_merge_private_bfd_data \ 259 _bfd_generic_bfd_merge_private_bfd_data 260 261#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 262extern bfd_boolean _bfd_ecoff_slurp_armap PARAMS ((bfd *abfd)); 263#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table 264#define _bfd_ecoff_construct_extended_name_table \ 265 _bfd_archive_bsd_construct_extended_name_table 266#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname 267extern bfd_boolean _bfd_ecoff_write_armap 268 PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int)); 269#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr 270#define _bfd_ecoff_openr_next_archived_file \ 271 bfd_generic_openr_next_archived_file 272#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index 273#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt 274#define _bfd_ecoff_update_armap_timestamp bfd_true 275#define _bfd_ecoff_bfd_is_target_special_symbol \ 276 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 277 278extern long _bfd_ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd)); 279extern long _bfd_ecoff_canonicalize_symtab PARAMS ((bfd *abfd, asymbol **alocation)); 280extern asymbol *_bfd_ecoff_make_empty_symbol PARAMS ((bfd *abfd)); 281extern void _bfd_ecoff_print_symbol 282 PARAMS ((bfd *, PTR filep, asymbol *, bfd_print_symbol_type)); 283extern void _bfd_ecoff_get_symbol_info 284 PARAMS ((bfd *, asymbol *, symbol_info *)); 285extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name 286 PARAMS ((bfd *, const char *)); 287#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno 288extern bfd_boolean _bfd_ecoff_find_nearest_line 289 PARAMS ((bfd *, asection *, asymbol **, bfd_vma offset, 290 const char **filename_ptr, const char **fnname_ptr, 291 unsigned int *retline_ptr)); 292#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 293#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols 294#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 295 296#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound 297extern long _bfd_ecoff_canonicalize_reloc 298 PARAMS ((bfd *, asection *, arelent **, asymbol **symbols)); 299/* ecoff_bfd_reloc_type_lookup defined by backend. */ 300 301extern bfd_boolean _bfd_ecoff_set_arch_mach 302 PARAMS ((bfd *, enum bfd_architecture, unsigned long)); 303extern bfd_boolean _bfd_ecoff_set_section_contents 304 PARAMS ((bfd *, asection *, const PTR location, file_ptr, bfd_size_type)); 305 306extern int _bfd_ecoff_sizeof_headers PARAMS ((bfd *abfd, bfd_boolean reloc)); 307/* ecoff_bfd_get_relocated_section_contents defined by backend. */ 308/* ecoff_bfd_relax_section defined by backend. */ 309extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create 310 PARAMS ((bfd *)); 311#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 312extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols 313 PARAMS ((bfd *, struct bfd_link_info *)); 314#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms 315extern bfd_boolean _bfd_ecoff_bfd_final_link 316 PARAMS ((bfd *, struct bfd_link_info *)); 317 318/* Hook functions for the generic COFF section reading code. */ 319 320extern PTR _bfd_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); 321#define _bfd_ecoff_set_alignment_hook \ 322 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void) 323extern bfd_boolean _bfd_ecoff_set_arch_mach_hook 324 PARAMS ((bfd *abfd, PTR filehdr)); 325extern bfd_boolean _bfd_ecoff_styp_to_sec_flags 326 PARAMS ((bfd *, PTR, const char *, asection *, flagword *)); 327extern bfd_boolean _bfd_ecoff_slurp_symbol_table PARAMS ((bfd *abfd)); 328 329/* ECOFF auxiliary information swapping routines. These are the same 330 for all ECOFF targets, so they are defined in ecofflink.c. */ 331 332extern void _bfd_ecoff_swap_tir_in 333 PARAMS ((int, const struct tir_ext *, TIR *)); 334extern void _bfd_ecoff_swap_tir_out 335 PARAMS ((int, const TIR *, struct tir_ext *)); 336extern void _bfd_ecoff_swap_rndx_in 337 PARAMS ((int, const struct rndx_ext *, RNDXR *)); 338extern void _bfd_ecoff_swap_rndx_out 339 PARAMS ((int, const RNDXR *, struct rndx_ext *)); 340