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) 44extern 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 50extern 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. */ 60struct 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 99extern 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 122int 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 131extern asection *gdb_section; 132 133#ifndef obj_frob_file 134#define obj_frob_file elf_frob_file 135#endif 136extern 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 141extern 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 146extern 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 158extern void elf_file_symbol (const char *, int); 159 160extern void obj_elf_section_change_hook (void); 161 162extern void obj_elf_section (int); 163extern void obj_elf_previous (int); 164extern void obj_elf_version (int); 165extern void obj_elf_common (int); 166extern void obj_elf_data (int); 167extern void obj_elf_text (int); 168extern void obj_elf_change_section 169 (const char *, int, int, int, const char *, int, int); 170extern struct fix *obj_elf_vtable_inherit (int); 171extern 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 179void 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 184void 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 189void 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. */ 206extern 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 228extern 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 233extern 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 241struct ecoff_extr; 242extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 243#endif 244extern asection *elf_com_section_ptr; 245extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 246 addressT size); 247 248#endif /* _OBJ_ELF_H */ 249