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) 45 extern 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 51 extern 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. */ 61 struct 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 92 extern 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 118 119 int 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 127 128 extern asection *gdb_section; 129 130 #ifndef obj_frob_file 131 #define obj_frob_file elf_frob_file 132 #endif 133 extern 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 138 extern 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 143 extern 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 155 extern void elf_file_symbol (const char *, int); 156 157 extern void obj_elf_section_change_hook (void); 158 159 extern void obj_elf_section (int); 160 extern char * obj_elf_section_name (void); 161 extern void obj_elf_previous (int); 162 extern void obj_elf_version (int); 163 extern void obj_elf_common (int); 164 extern void obj_elf_data (int); 165 extern void obj_elf_text (int); 166 extern void obj_elf_change_section 167 (const char *, int, bfd_vma, int, const char *, int, int); 168 extern struct fix *obj_elf_vtable_inherit (int); 169 extern 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 176 177 void 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 181 182 void 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 186 187 void 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 192 193 void 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. */ 209 extern 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. */ 230 231 extern 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 235 236 extern 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 244 struct ecoff_extr; 245 extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 246 #endif 247 extern asection *elf_com_section_ptr; 248 extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 249 addressT size); 250 251 #endif /* _OBJ_ELF_H */ 252