1 /* ELF object file format. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS 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, or (at your option) 10 any later version. 11 12 GAS 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 GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 20 02111-1307, USA. */ 21 22 /* HP PA-RISC support was contributed by the Center for Software Science 23 at the University of Utah. */ 24 25 #ifndef _OBJ_ELF_H 26 #define _OBJ_ELF_H 27 28 #define OBJ_ELF 1 29 30 /* Note that all macros in this file should be wrapped in #ifndef, for 31 sake of obj-multi.h which includes this file. */ 32 33 #ifndef OUTPUT_FLAVOR 34 #define OUTPUT_FLAVOR bfd_target_elf_flavour 35 #endif 36 37 #include "bfd.h" 38 39 #define BYTES_IN_WORD 4 /* for now */ 40 #include "bfd/elf-bfd.h" 41 42 #include "targ-cpu.h" 43 44 #ifdef TC_ALPHA 45 #define ECOFF_DEBUGGING (alpha_flag_mdebug > 0) 46 extern int alpha_flag_mdebug; 47 #endif 48 49 /* For now, always set ECOFF_DEBUGGING for a MIPS target. */ 50 #ifdef TC_MIPS 51 #define ECOFF_DEBUGGING mips_flag_mdebug 52 extern int mips_flag_mdebug; 53 #endif /* TC_MIPS */ 54 55 #ifdef OBJ_MAYBE_ECOFF 56 #ifndef ECOFF_DEBUGGING 57 #define ECOFF_DEBUGGING 1 58 #endif 59 #endif 60 61 /* Additional information we keep for each symbol. */ 62 struct elf_obj_sy 63 { 64 /* Whether the symbol has been marked as local. */ 65 int local; 66 67 /* Use this to keep track of .size expressions that involve 68 differences that we can't compute yet. */ 69 expressionS *size; 70 71 /* The name specified by the .symver directive. */ 72 char *versioned_name; 73 74 #ifdef ECOFF_DEBUGGING 75 /* If we are generating ECOFF debugging information, we need some 76 additional fields for each symbol. */ 77 struct efdr *ecoff_file; 78 struct localsym *ecoff_symbol; 79 valueT ecoff_extern_size; 80 #endif 81 }; 82 83 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy 84 85 /* Symbol fields used by the ELF back end. */ 86 #define ELF_TARGET_SYMBOL_FIELDS int local:1; 87 88 /* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead. */ 89 #ifndef TARGET_SYMBOL_FIELDS 90 #define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS 91 #endif 92 93 /* #include "targ-cpu.h" */ 94 95 #ifndef FALSE 96 #define FALSE 0 97 #define TRUE !FALSE 98 #endif 99 100 #ifndef obj_begin 101 #define obj_begin() elf_begin () 102 #endif 103 extern void elf_begin (void); 104 105 /* should be conditional on address size! */ 106 #define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd)) 107 108 #ifndef S_GET_SIZE 109 #define S_GET_SIZE(S) \ 110 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size) 111 #endif 112 #ifndef S_SET_SIZE 113 #define S_SET_SIZE(S,V) \ 114 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V)) 115 #endif 116 117 #ifndef S_GET_ALIGN 118 #define S_GET_ALIGN(S) \ 119 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value) 120 #endif 121 #ifndef S_SET_ALIGN 122 #define S_SET_ALIGN(S,V) \ 123 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V)) 124 #endif 125 126 int elf_s_get_other (symbolS *); 127 #ifndef S_GET_OTHER 128 #define S_GET_OTHER(S) (elf_s_get_other (S)) 129 #endif 130 #ifndef S_SET_OTHER 131 #define S_SET_OTHER(S,V) \ 132 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V)) 133 #endif 134 135 extern asection *gdb_section; 136 137 #ifndef obj_sec_set_private_data 138 #define obj_sec_set_private_data(B, S) \ 139 if (! BFD_SEND ((B), _new_section_hook, ((B), (S)))) \ 140 as_fatal (_("can't allocate ELF private section data: %s"), \ 141 bfd_errmsg (bfd_get_error ())) 142 #endif 143 144 #ifndef obj_frob_file 145 #define obj_frob_file elf_frob_file 146 #endif 147 extern void elf_frob_file (void); 148 149 #ifndef obj_frob_file_before_adjust 150 #define obj_frob_file_before_adjust elf_frob_file_before_adjust 151 #endif 152 extern void elf_frob_file_before_adjust (void); 153 154 #ifndef obj_frob_file_after_relocs 155 #define obj_frob_file_after_relocs elf_frob_file_after_relocs 156 #endif 157 extern void elf_frob_file_after_relocs (void); 158 159 #ifndef obj_app_file 160 #define obj_app_file elf_file_symbol 161 #endif 162 extern void elf_file_symbol (const char *); 163 164 extern void obj_elf_section_change_hook (void); 165 166 extern void obj_elf_section (int); 167 extern void obj_elf_previous (int); 168 extern void obj_elf_version (int); 169 extern void obj_elf_common (int); 170 extern void obj_elf_data (int); 171 extern void obj_elf_text (int); 172 extern void obj_elf_change_section 173 (const char *, int, int, int, const char *, int, int); 174 extern struct fix *obj_elf_vtable_inherit (int); 175 extern struct fix *obj_elf_vtable_entry (int); 176 177 /* BFD wants to write the udata field, which is a no-no for the 178 predefined section symbols in bfd/section.c. They are read-only. */ 179 #ifndef obj_sec_sym_ok_for_reloc 180 #define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0) 181 #endif 182 183 void elf_obj_read_begin_hook (void); 184 #ifndef obj_read_begin_hook 185 #define obj_read_begin_hook elf_obj_read_begin_hook 186 #endif 187 188 void elf_obj_symbol_new_hook (symbolS *); 189 #ifndef obj_symbol_new_hook 190 #define obj_symbol_new_hook elf_obj_symbol_new_hook 191 #endif 192 193 void elf_copy_symbol_attributes (symbolS *, symbolS *); 194 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES 195 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 196 (elf_copy_symbol_attributes (DEST, SRC)) 197 #endif 198 199 #ifndef SEPARATE_STAB_SECTIONS 200 /* Avoid ifndef each separate macro setting by wrapping the whole of the 201 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS 202 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS 203 and OBJ_PROCESS_STAB too, without needing the tweaks below. */ 204 205 /* Stabs go in a separate section. */ 206 #define SEPARATE_STAB_SECTIONS 1 207 208 /* We need 12 bytes at the start of the section to hold some initial 209 information. */ 210 extern void obj_elf_init_stab_section (segT); 211 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg) 212 213 #ifdef ECOFF_DEBUGGING 214 /* We smuggle stabs in ECOFF rather than using a separate section. 215 The Irix linker can not handle a separate stabs section. */ 216 217 #undef SEPARATE_STAB_SECTIONS 218 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING) 219 220 #undef INIT_STAB_SECTION 221 #define INIT_STAB_SECTION(seg) \ 222 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0))) 223 224 #undef OBJ_PROCESS_STAB 225 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \ 226 if (ECOFF_DEBUGGING) \ 227 ecoff_stab ((seg), (what), (string), (type), (other), (desc)) 228 #endif /* ECOFF_DEBUGGING */ 229 230 #endif /* SEPARATE_STAB_SECTIONS not defined. */ 231 232 extern void elf_frob_symbol (symbolS *, int *); 233 #ifndef obj_frob_symbol 234 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt) 235 #endif 236 237 extern void elf_pop_insert (void); 238 #ifndef obj_pop_insert 239 #define obj_pop_insert() elf_pop_insert() 240 #endif 241 242 #ifndef OBJ_MAYBE_ELF 243 #define obj_ecoff_set_ext elf_ecoff_set_ext 244 #ifdef ANSI_PROTOTYPES 245 struct ecoff_extr; 246 #endif 247 extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 248 #endif 249 250 #endif /* _OBJ_ELF_H */ 251