| 1 | /* BFD COFF object file private structure. |
| 2 | Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program 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 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program 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 this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "bfdlink.h" |
| 22 | |
| 23 | /* Object file tdata; access macros */ |
| 24 | |
| 25 | #define coff_data(bfd) ((bfd)->tdata.coff_obj_data) |
| 26 | #define exec_hdr(bfd) (coff_data(bfd)->hdr) |
| 27 | #define obj_symbols(bfd) (coff_data(bfd)->symbols) |
| 28 | #define obj_sym_filepos(bfd) (coff_data(bfd)->sym_filepos) |
| 29 | |
| 30 | #define obj_relocbase(bfd) (coff_data(bfd)->relocbase) |
| 31 | #define obj_raw_syments(bfd) (coff_data(bfd)->raw_syments) |
| 32 | #define obj_raw_syment_count(bfd) (coff_data(bfd)->raw_syment_count) |
| 33 | #define obj_convert(bfd) (coff_data(bfd)->conversion_table) |
| 34 | #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size) |
| 35 | |
| 36 | #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms) |
| 37 | #define obj_coff_strings(bfd) (coff_data (bfd)->strings) |
| 38 | #define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes) |
| 39 | |
| 40 | /* `Tdata' information kept for COFF files. */ |
| 41 | |
| 42 | typedef struct coff_tdata |
| 43 | { |
| 44 | struct coff_symbol_struct *symbols; /* symtab for input bfd */ |
| 45 | unsigned int *conversion_table; |
| 46 | int conv_table_size; |
| 47 | file_ptr sym_filepos; |
| 48 | |
| 49 | struct coff_ptr_struct *raw_syments; |
| 50 | unsigned int raw_syment_count; |
| 51 | |
| 52 | /* These are only valid once writing has begun */ |
| 53 | long int relocbase; |
| 54 | |
| 55 | /* These members communicate important constants about the symbol table |
| 56 | to GDB's symbol-reading code. These `constants' unfortunately vary |
| 57 | from coff implementation to implementation... */ |
| 58 | unsigned local_n_btmask; |
| 59 | unsigned local_n_btshft; |
| 60 | unsigned local_n_tmask; |
| 61 | unsigned local_n_tshift; |
| 62 | unsigned local_symesz; |
| 63 | unsigned local_auxesz; |
| 64 | unsigned local_linesz; |
| 65 | |
| 66 | /* Used by the COFF backend linker. */ |
| 67 | PTR external_syms; |
| 68 | char *strings; |
| 69 | struct coff_link_hash_entry **sym_hashes; |
| 70 | } coff_data_type; |
| 71 | |
| 72 | /* We take the address of the first element of a asymbol to ensure that the |
| 73 | * macro is only ever applied to an asymbol. */ |
| 74 | #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd))) |
| 75 | |
| 76 | /* COFF linker hash table entries. */ |
| 77 | |
| 78 | struct coff_link_hash_entry |
| 79 | { |
| 80 | struct bfd_link_hash_entry root; |
| 81 | |
| 82 | /* Symbol index in output file. Set to -1 initially. Set to -2 if |
| 83 | there is a reloc against this symbol. */ |
| 84 | long indx; |
| 85 | |
| 86 | /* Symbol type. */ |
| 87 | unsigned short type; |
| 88 | |
| 89 | /* Symbol class. */ |
| 90 | unsigned char class; |
| 91 | |
| 92 | /* Number of auxiliary entries. */ |
| 93 | char numaux; |
| 94 | |
| 95 | /* BFD to take auxiliary entries from. */ |
| 96 | bfd *auxbfd; |
| 97 | |
| 98 | /* Pointer to array of auxiliary entries, if any. */ |
| 99 | union internal_auxent *aux; |
| 100 | }; |
| 101 | |
| 102 | /* COFF linker hash table. */ |
| 103 | |
| 104 | struct coff_link_hash_table |
| 105 | { |
| 106 | struct bfd_link_hash_table root; |
| 107 | }; |
| 108 | |
| 109 | /* Look up an entry in a COFF linker hash table. */ |
| 110 | |
| 111 | #define coff_link_hash_lookup(table, string, create, copy, follow) \ |
| 112 | ((struct coff_link_hash_entry *) \ |
| 113 | bfd_link_hash_lookup (&(table)->root, (string), (create), \ |
| 114 | (copy), (follow))) |
| 115 | |
| 116 | /* Traverse a COFF linker hash table. */ |
| 117 | |
| 118 | #define coff_link_hash_traverse(table, func, info) \ |
| 119 | (bfd_link_hash_traverse \ |
| 120 | (&(table)->root, \ |
| 121 | (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ |
| 122 | (info))) |
| 123 | |
| 124 | /* Get the COFF linker hash table from a link_info structure. */ |
| 125 | |
| 126 | #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash)) |
| 127 | |
| 128 | /* Functions in coffgen.c. */ |
| 129 | extern const bfd_target *coff_object_p PARAMS ((bfd *)); |
| 130 | extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int)); |
| 131 | extern long coff_get_symtab_upper_bound PARAMS ((bfd *)); |
| 132 | extern long coff_get_symtab PARAMS ((bfd *, asymbol **)); |
| 133 | extern int coff_count_linenumbers PARAMS ((bfd *)); |
| 134 | extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *)); |
| 135 | extern boolean coff_renumber_symbols PARAMS ((bfd *)); |
| 136 | extern void coff_mangle_symbols PARAMS ((bfd *)); |
| 137 | extern boolean coff_write_symbols PARAMS ((bfd *)); |
| 138 | extern boolean coff_write_linenumbers PARAMS ((bfd *)); |
| 139 | extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *)); |
| 140 | extern asymbol *coff_section_symbol PARAMS ((bfd *, char *)); |
| 141 | extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *)); |
| 142 | extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr)); |
| 143 | extern asymbol *coff_make_empty_symbol PARAMS ((bfd *)); |
| 144 | extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *, |
| 145 | bfd_print_symbol_type how)); |
| 146 | extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *, |
| 147 | symbol_info *ret)); |
| 148 | extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR, |
| 149 | unsigned long)); |
| 150 | extern boolean coff_find_nearest_line PARAMS ((bfd *, |
| 151 | asection *, |
| 152 | asymbol **, |
| 153 | bfd_vma offset, |
| 154 | CONST char **filename_ptr, |
| 155 | CONST char **functionname_ptr, |
| 156 | unsigned int *line_ptr)); |
| 157 | extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc)); |
| 158 | extern boolean bfd_coff_reloc16_relax_section |
| 159 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); |
| 160 | extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents |
| 161 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| 162 | bfd_byte *, boolean relocateable, asymbol **)); |
| 163 | extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *, |
| 164 | struct bfd_link_info *, |
| 165 | asection *)); |
| 166 | extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip, |
| 167 | asection *input_section, |
| 168 | bfd_vma val)); |
| 169 | |
| 170 | /* Functions in cofflink.c. */ |
| 171 | |
| 172 | extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create |
| 173 | PARAMS ((bfd *)); |
| 174 | extern boolean _bfd_coff_link_add_symbols |
| 175 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 176 | extern boolean _bfd_coff_final_link |
| 177 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 178 | |
| 179 | /* And more taken from the source .. */ |
| 180 | |