1/* ELF object file format. 2 Copyright (C) 1992-2017 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 GAS is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GAS; see the file COPYING. If not, write to the Free 18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 19 02110-1301, USA. */ 20 21/* HP PA-RISC support was contributed by the Center for Software Science 22 at the University of Utah. */ 23 24#ifndef _OBJ_ELF_H 25#define _OBJ_ELF_H 26 27#define OBJ_ELF 1 28 29/* Note that all macros in this file should be wrapped in #ifndef, for 30 sake of obj-multi.h which includes this file. */ 31 32#ifndef OUTPUT_FLAVOR 33#define OUTPUT_FLAVOR bfd_target_elf_flavour 34#endif 35 36#define BYTES_IN_WORD 4 /* for now */ 37#include "bfd/elf-bfd.h" 38 39#include "targ-cpu.h" 40 41#ifdef TC_ALPHA 42#define ECOFF_DEBUGGING (alpha_flag_mdebug > 0) 43extern int alpha_flag_mdebug; 44#endif 45 46/* For now, always set ECOFF_DEBUGGING for a MIPS target. */ 47#ifdef TC_MIPS 48#define ECOFF_DEBUGGING mips_flag_mdebug 49extern int mips_flag_mdebug; 50#endif /* TC_MIPS */ 51 52#ifdef OBJ_MAYBE_ECOFF 53#ifndef ECOFF_DEBUGGING 54#define ECOFF_DEBUGGING 1 55#endif 56#endif 57 58/* Additional information we keep for each symbol. */ 59struct elf_obj_sy 60{ 61 /* Whether the symbol has been marked as local. */ 62 int local; 63 64 /* Use this to keep track of .size expressions that involve 65 differences that we can't compute yet. */ 66 expressionS *size; 67 68 /* The name specified by the .symver directive. */ 69 char *versioned_name; 70 71#ifdef ECOFF_DEBUGGING 72 /* If we are generating ECOFF debugging information, we need some 73 additional fields for each symbol. */ 74 struct efdr *ecoff_file; 75 struct localsym *ecoff_symbol; 76 valueT ecoff_extern_size; 77#endif 78}; 79 80#define OBJ_SYMFIELD_TYPE struct elf_obj_sy 81 82#ifndef FALSE 83#define FALSE 0 84#define TRUE !FALSE 85#endif 86 87#ifndef obj_begin 88#define obj_begin() elf_begin () 89#endif 90extern void elf_begin (void); 91 92#ifndef LOCAL_LABEL_PREFIX 93#define LOCAL_LABEL_PREFIX '.' 94#endif 95 96/* should be conditional on address size! */ 97#define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd)) 98 99#ifndef S_GET_SIZE 100#define S_GET_SIZE(S) \ 101 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size) 102#endif 103#ifndef S_SET_SIZE 104#define S_SET_SIZE(S,V) \ 105 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V)) 106#endif 107 108#ifndef S_GET_ALIGN 109#define S_GET_ALIGN(S) \ 110 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value) 111#endif 112#ifndef S_SET_ALIGN 113#define S_SET_ALIGN(S,V) \ 114 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V)) 115#endif 116 117int elf_s_get_other (symbolS *); 118#ifndef S_GET_OTHER 119#define S_GET_OTHER(S) (elf_s_get_other (S)) 120#endif 121#ifndef S_SET_OTHER 122#define S_SET_OTHER(S,V) \ 123 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V)) 124#endif 125 126extern asection *gdb_section; 127 128#ifndef obj_frob_file 129#define obj_frob_file elf_frob_file 130#endif 131extern void elf_frob_file (void); 132 133#ifndef obj_frob_file_before_adjust 134#define obj_frob_file_before_adjust elf_frob_file_before_adjust 135#endif 136extern void elf_frob_file_before_adjust (void); 137 138#ifndef obj_frob_file_after_relocs 139#define obj_frob_file_after_relocs elf_frob_file_after_relocs 140#endif 141extern void elf_frob_file_after_relocs (void); 142 143/* If the target doesn't have special processing for labels, take care of 144 dwarf2 output at the object file level. */ 145#ifndef tc_frob_label 146#include "dwarf2dbg.h" 147#define obj_frob_label dwarf2_emit_label 148#endif 149 150#ifndef obj_app_file 151#define obj_app_file elf_file_symbol 152#endif 153extern void elf_file_symbol (const char *, int); 154 155extern void obj_elf_section_change_hook (void); 156 157extern void obj_elf_section (int); 158extern const char * obj_elf_section_name (void); 159extern void obj_elf_previous (int); 160extern void obj_elf_version (int); 161extern void obj_elf_common (int); 162extern void obj_elf_data (int); 163extern void obj_elf_text (int); 164extern void obj_elf_change_section 165 (const char *, unsigned int, bfd_vma, int, const char *, int, int); 166extern struct fix *obj_elf_vtable_inherit (int); 167extern struct fix *obj_elf_vtable_entry (int); 168extern bfd_boolean obj_elf_seen_attribute 169 (int, unsigned int); 170extern int obj_elf_vendor_attribute (int); 171 172/* BFD wants to write the udata field, which is a no-no for the 173 predefined section symbols in bfd/section.c. They are read-only. */ 174#ifndef obj_sec_sym_ok_for_reloc 175#define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0) 176#endif 177 178void elf_obj_read_begin_hook (void); 179#ifndef obj_read_begin_hook 180#define obj_read_begin_hook elf_obj_read_begin_hook 181#endif 182 183void elf_obj_symbol_new_hook (symbolS *); 184#ifndef obj_symbol_new_hook 185#define obj_symbol_new_hook elf_obj_symbol_new_hook 186#endif 187 188void elf_copy_symbol_attributes (symbolS *, symbolS *); 189#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES 190#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 191 (elf_copy_symbol_attributes (DEST, SRC)) 192#endif 193 194void elf_adjust_symtab (void); 195#ifndef obj_adjust_symtab 196#define obj_adjust_symtab elf_adjust_symtab 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. */ 210extern 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 232extern 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 237extern 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/* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */ 244#define obj_ecoff_set_ext elf_ecoff_set_ext 245struct ecoff_extr; 246extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 247#endif 248extern asection *elf_com_section_ptr; 249extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 250 addressT size); 251 252#endif /* _OBJ_ELF_H */ 253