1 /* ELF object file format. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003, 2004, 2006, 2007 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, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, 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 #define BYTES_IN_WORD 4 /* for now */ 38 #include "bfd/elf-bfd.h" 39 40 #include "targ-cpu.h" 41 42 #ifdef TC_ALPHA 43 #define ECOFF_DEBUGGING (alpha_flag_mdebug > 0) 44 extern int alpha_flag_mdebug; 45 #endif 46 47 /* For now, always set ECOFF_DEBUGGING for a MIPS target. */ 48 #ifdef TC_MIPS 49 #define ECOFF_DEBUGGING mips_flag_mdebug 50 extern int mips_flag_mdebug; 51 #endif /* TC_MIPS */ 52 53 #ifdef OBJ_MAYBE_ECOFF 54 #ifndef ECOFF_DEBUGGING 55 #define ECOFF_DEBUGGING 1 56 #endif 57 #endif 58 59 /* Additional information we keep for each symbol. */ 60 struct elf_obj_sy 61 { 62 /* Whether the symbol has been marked as local. */ 63 int local; 64 65 /* Use this to keep track of .size expressions that involve 66 differences that we can't compute yet. */ 67 expressionS *size; 68 69 /* The name specified by the .symver directive. */ 70 char *versioned_name; 71 72 #ifdef ECOFF_DEBUGGING 73 /* If we are generating ECOFF debugging information, we need some 74 additional fields for each symbol. */ 75 struct efdr *ecoff_file; 76 struct localsym *ecoff_symbol; 77 valueT ecoff_extern_size; 78 #endif 79 }; 80 81 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy 82 83 /* Symbol fields used by the ELF back end. */ 84 #define ELF_TARGET_SYMBOL_FIELDS unsigned int local:1; 85 86 /* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead. */ 87 #ifndef TARGET_SYMBOL_FIELDS 88 #define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS 89 #endif 90 91 #ifndef FALSE 92 #define FALSE 0 93 #define TRUE !FALSE 94 #endif 95 96 #ifndef obj_begin 97 #define obj_begin() elf_begin () 98 #endif 99 extern void elf_begin (void); 100 101 /* should be conditional on address size! */ 102 #define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd)) 103 104 #ifndef S_GET_SIZE 105 #define S_GET_SIZE(S) \ 106 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size) 107 #endif 108 #ifndef S_SET_SIZE 109 #define S_SET_SIZE(S,V) \ 110 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V)) 111 #endif 112 113 #ifndef S_GET_ALIGN 114 #define S_GET_ALIGN(S) \ 115 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value) 116 #endif 117 #ifndef S_SET_ALIGN 118 #define S_SET_ALIGN(S,V) \ 119 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V)) 120 #endif 121 122 int elf_s_get_other (symbolS *); 123 #ifndef S_GET_OTHER 124 #define S_GET_OTHER(S) (elf_s_get_other (S)) 125 #endif 126 #ifndef S_SET_OTHER 127 #define S_SET_OTHER(S,V) \ 128 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V)) 129 #endif 130 131 extern asection *gdb_section; 132 133 #ifndef obj_frob_file 134 #define obj_frob_file elf_frob_file 135 #endif 136 extern void elf_frob_file (void); 137 138 #ifndef obj_frob_file_before_adjust 139 #define obj_frob_file_before_adjust elf_frob_file_before_adjust 140 #endif 141 extern void elf_frob_file_before_adjust (void); 142 143 #ifndef obj_frob_file_after_relocs 144 #define obj_frob_file_after_relocs elf_frob_file_after_relocs 145 #endif 146 extern void elf_frob_file_after_relocs (void); 147 148 /* If the target doesn't have special processing for labels, take care of 149 dwarf2 output at the object file level. */ 150 #ifndef tc_frob_label 151 #include "dwarf2dbg.h" 152 #define obj_frob_label dwarf2_emit_label 153 #endif 154 155 #ifndef obj_app_file 156 #define obj_app_file elf_file_symbol 157 #endif 158 extern void elf_file_symbol (const char *, int); 159 160 extern void obj_elf_section_change_hook (void); 161 162 extern void obj_elf_section (int); 163 extern void obj_elf_previous (int); 164 extern void obj_elf_version (int); 165 extern void obj_elf_common (int); 166 extern void obj_elf_data (int); 167 extern void obj_elf_text (int); 168 extern void obj_elf_change_section 169 (const char *, int, int, int, const char *, int, int); 170 extern struct fix *obj_elf_vtable_inherit (int); 171 extern struct fix *obj_elf_vtable_entry (int); 172 173 /* BFD wants to write the udata field, which is a no-no for the 174 predefined section symbols in bfd/section.c. They are read-only. */ 175 #ifndef obj_sec_sym_ok_for_reloc 176 #define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0) 177 #endif 178 179 void elf_obj_read_begin_hook (void); 180 #ifndef obj_read_begin_hook 181 #define obj_read_begin_hook elf_obj_read_begin_hook 182 #endif 183 184 void elf_obj_symbol_new_hook (symbolS *); 185 #ifndef obj_symbol_new_hook 186 #define obj_symbol_new_hook elf_obj_symbol_new_hook 187 #endif 188 189 void elf_copy_symbol_attributes (symbolS *, symbolS *); 190 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES 191 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 192 (elf_copy_symbol_attributes (DEST, SRC)) 193 #endif 194 195 #ifndef SEPARATE_STAB_SECTIONS 196 /* Avoid ifndef each separate macro setting by wrapping the whole of the 197 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS 198 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS 199 and OBJ_PROCESS_STAB too, without needing the tweaks below. */ 200 201 /* Stabs go in a separate section. */ 202 #define SEPARATE_STAB_SECTIONS 1 203 204 /* We need 12 bytes at the start of the section to hold some initial 205 information. */ 206 extern void obj_elf_init_stab_section (segT); 207 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg) 208 209 #ifdef ECOFF_DEBUGGING 210 /* We smuggle stabs in ECOFF rather than using a separate section. 211 The Irix linker can not handle a separate stabs section. */ 212 213 #undef SEPARATE_STAB_SECTIONS 214 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING) 215 216 #undef INIT_STAB_SECTION 217 #define INIT_STAB_SECTION(seg) \ 218 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0))) 219 220 #undef OBJ_PROCESS_STAB 221 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \ 222 if (ECOFF_DEBUGGING) \ 223 ecoff_stab ((seg), (what), (string), (type), (other), (desc)) 224 #endif /* ECOFF_DEBUGGING */ 225 226 #endif /* SEPARATE_STAB_SECTIONS not defined. */ 227 228 extern void elf_frob_symbol (symbolS *, int *); 229 #ifndef obj_frob_symbol 230 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt) 231 #endif 232 233 extern void elf_pop_insert (void); 234 #ifndef obj_pop_insert 235 #define obj_pop_insert() elf_pop_insert() 236 #endif 237 238 #ifndef OBJ_MAYBE_ELF 239 /* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */ 240 #define obj_ecoff_set_ext elf_ecoff_set_ext 241 struct ecoff_extr; 242 extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 243 #endif 244 extern asection *elf_com_section_ptr; 245 extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 246 addressT size); 247 248 #endif /* _OBJ_ELF_H */ 249