1/* ELF object file format. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 4 Free Software Foundation, Inc. 5 6 This file is part of GAS, the GNU Assembler. 7 8 GAS is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3, or (at your option) 11 any later version. 12 13 GAS is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GAS; see the file COPYING. If not, write to the Free 20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 21 02110-1301, USA. */ 22 23/* HP PA-RISC support was contributed by the Center for Software Science 24 at the University of Utah. */ 25 26#ifndef _OBJ_ELF_H 27#define _OBJ_ELF_H 28 29#define OBJ_ELF 1 30 31/* Note that all macros in this file should be wrapped in #ifndef, for 32 sake of obj-multi.h which includes this file. */ 33 34#ifndef OUTPUT_FLAVOR 35#define OUTPUT_FLAVOR bfd_target_elf_flavour 36#endif 37 38#define BYTES_IN_WORD 4 /* for now */ 39#include "bfd/elf-bfd.h" 40 41#include "targ-cpu.h" 42 43#ifdef TC_ALPHA 44#define ECOFF_DEBUGGING (alpha_flag_mdebug > 0) 45extern int alpha_flag_mdebug; 46#endif 47 48/* For now, always set ECOFF_DEBUGGING for a MIPS target. */ 49#ifdef TC_MIPS 50#define ECOFF_DEBUGGING mips_flag_mdebug 51extern int mips_flag_mdebug; 52#endif /* TC_MIPS */ 53 54#ifdef OBJ_MAYBE_ECOFF 55#ifndef ECOFF_DEBUGGING 56#define ECOFF_DEBUGGING 1 57#endif 58#endif 59 60/* Additional information we keep for each symbol. */ 61struct elf_obj_sy 62{ 63 /* Whether the symbol has been marked as local. */ 64 int local; 65 66 /* Use this to keep track of .size expressions that involve 67 differences that we can't compute yet. */ 68 expressionS *size; 69 70 /* The name specified by the .symver directive. */ 71 char *versioned_name; 72 73#ifdef ECOFF_DEBUGGING 74 /* If we are generating ECOFF debugging information, we need some 75 additional fields for each symbol. */ 76 struct efdr *ecoff_file; 77 struct localsym *ecoff_symbol; 78 valueT ecoff_extern_size; 79#endif 80}; 81 82#define OBJ_SYMFIELD_TYPE struct elf_obj_sy 83 84#ifndef FALSE 85#define FALSE 0 86#define TRUE !FALSE 87#endif 88 89#ifndef obj_begin 90#define obj_begin() elf_begin () 91#endif 92extern void elf_begin (void); 93 94#ifndef LOCAL_LABEL_PREFIX 95#define LOCAL_LABEL_PREFIX '.' 96#endif 97 98/* should be conditional on address size! */ 99#define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd)) 100 101#ifndef S_GET_SIZE 102#define S_GET_SIZE(S) \ 103 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size) 104#endif 105#ifndef S_SET_SIZE 106#define S_SET_SIZE(S,V) \ 107 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V)) 108#endif 109 110#ifndef S_GET_ALIGN 111#define S_GET_ALIGN(S) \ 112 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value) 113#endif 114#ifndef S_SET_ALIGN 115#define S_SET_ALIGN(S,V) \ 116 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V)) 117#endif 118 119int elf_s_get_other (symbolS *); 120#ifndef S_GET_OTHER 121#define S_GET_OTHER(S) (elf_s_get_other (S)) 122#endif 123#ifndef S_SET_OTHER 124#define S_SET_OTHER(S,V) \ 125 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V)) 126#endif 127 128extern asection *gdb_section; 129 130#ifndef obj_frob_file 131#define obj_frob_file elf_frob_file 132#endif 133extern void elf_frob_file (void); 134 135#ifndef obj_frob_file_before_adjust 136#define obj_frob_file_before_adjust elf_frob_file_before_adjust 137#endif 138extern void elf_frob_file_before_adjust (void); 139 140#ifndef obj_frob_file_after_relocs 141#define obj_frob_file_after_relocs elf_frob_file_after_relocs 142#endif 143extern void elf_frob_file_after_relocs (void); 144 145/* If the target doesn't have special processing for labels, take care of 146 dwarf2 output at the object file level. */ 147#ifndef tc_frob_label 148#include "dwarf2dbg.h" 149#define obj_frob_label dwarf2_emit_label 150#endif 151 152#ifndef obj_app_file 153#define obj_app_file elf_file_symbol 154#endif 155extern void elf_file_symbol (const char *, int); 156 157extern void obj_elf_section_change_hook (void); 158 159extern void obj_elf_section (int); 160extern char * obj_elf_section_name (void); 161extern void obj_elf_previous (int); 162extern void obj_elf_version (int); 163extern void obj_elf_common (int); 164extern void obj_elf_data (int); 165extern void obj_elf_text (int); 166extern void obj_elf_change_section 167 (const char *, int, bfd_vma, int, const char *, int, int); 168extern struct fix *obj_elf_vtable_inherit (int); 169extern struct fix *obj_elf_vtable_entry (int); 170 171/* BFD wants to write the udata field, which is a no-no for the 172 predefined section symbols in bfd/section.c. They are read-only. */ 173#ifndef obj_sec_sym_ok_for_reloc 174#define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0) 175#endif 176 177void elf_obj_read_begin_hook (void); 178#ifndef obj_read_begin_hook 179#define obj_read_begin_hook elf_obj_read_begin_hook 180#endif 181 182void elf_obj_symbol_new_hook (symbolS *); 183#ifndef obj_symbol_new_hook 184#define obj_symbol_new_hook elf_obj_symbol_new_hook 185#endif 186 187void elf_copy_symbol_attributes (symbolS *, symbolS *); 188#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES 189#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 190 (elf_copy_symbol_attributes (DEST, SRC)) 191#endif 192 193void elf_adjust_symtab (void); 194#ifndef obj_adjust_symtab 195#define obj_adjust_symtab elf_adjust_symtab 196#endif 197 198#ifndef SEPARATE_STAB_SECTIONS 199/* Avoid ifndef each separate macro setting by wrapping the whole of the 200 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS 201 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS 202 and OBJ_PROCESS_STAB too, without needing the tweaks below. */ 203 204/* Stabs go in a separate section. */ 205#define SEPARATE_STAB_SECTIONS 1 206 207/* We need 12 bytes at the start of the section to hold some initial 208 information. */ 209extern void obj_elf_init_stab_section (segT); 210#define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg) 211 212#ifdef ECOFF_DEBUGGING 213/* We smuggle stabs in ECOFF rather than using a separate section. 214 The Irix linker can not handle a separate stabs section. */ 215 216#undef SEPARATE_STAB_SECTIONS 217#define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING) 218 219#undef INIT_STAB_SECTION 220#define INIT_STAB_SECTION(seg) \ 221 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0))) 222 223#undef OBJ_PROCESS_STAB 224#define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \ 225 if (ECOFF_DEBUGGING) \ 226 ecoff_stab ((seg), (what), (string), (type), (other), (desc)) 227#endif /* ECOFF_DEBUGGING */ 228 229#endif /* SEPARATE_STAB_SECTIONS not defined. */ 230 231extern void elf_frob_symbol (symbolS *, int *); 232#ifndef obj_frob_symbol 233#define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt) 234#endif 235 236extern void elf_pop_insert (void); 237#ifndef obj_pop_insert 238#define obj_pop_insert() elf_pop_insert() 239#endif 240 241#ifndef OBJ_MAYBE_ELF 242/* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */ 243#define obj_ecoff_set_ext elf_ecoff_set_ext 244struct ecoff_extr; 245extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 246#endif 247extern asection *elf_com_section_ptr; 248extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 249 addressT size); 250 251#endif /* _OBJ_ELF_H */ 252