1 /* ELF object file format. 2 Copyright (C) 1992-2020 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) 43 extern 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 49 extern 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. */ 59 struct 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 90 extern 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 116 117 int 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 125 126 extern asection *gdb_section; 127 128 #ifndef obj_frob_file 129 #define obj_frob_file elf_frob_file 130 #endif 131 extern 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 136 extern 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 141 extern 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 153 extern void elf_file_symbol (const char *, int); 154 155 extern void obj_elf_section_change_hook (void); 156 157 extern void obj_elf_section (int); 158 extern const char * obj_elf_section_name (void); 159 extern void obj_elf_previous (int); 160 extern void obj_elf_version (int); 161 extern void obj_elf_common (int); 162 extern void obj_elf_data (int); 163 extern void obj_elf_text (int); 164 extern void obj_elf_change_section 165 (const char *, unsigned int, unsigned int, bfd_vma, int, const char *, 166 int, int); 167 extern void obj_elf_vtable_inherit (int); 168 extern void obj_elf_vtable_entry (int); 169 extern struct fix * obj_elf_get_vtable_inherit (void); 170 extern struct fix * obj_elf_get_vtable_entry (void); 171 extern bfd_boolean obj_elf_seen_attribute 172 (int, unsigned int); 173 extern int obj_elf_vendor_attribute (int); 174 175 /* BFD wants to write the udata field, which is a no-no for the 176 predefined section symbols in bfd/section.c. They are read-only. */ 177 #ifndef obj_sec_sym_ok_for_reloc 178 #define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0) 179 #endif 180 181 void elf_obj_read_begin_hook (void); 182 #ifndef obj_read_begin_hook 183 #define obj_read_begin_hook elf_obj_read_begin_hook 184 #endif 185 186 void elf_obj_symbol_new_hook (symbolS *); 187 #ifndef obj_symbol_new_hook 188 #define obj_symbol_new_hook elf_obj_symbol_new_hook 189 #endif 190 191 void elf_copy_symbol_attributes (symbolS *, symbolS *); 192 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES 193 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 194 (elf_copy_symbol_attributes (DEST, SRC)) 195 #endif 196 197 void elf_adjust_symtab (void); 198 #ifndef obj_adjust_symtab 199 #define obj_adjust_symtab elf_adjust_symtab 200 #endif 201 202 #ifndef SEPARATE_STAB_SECTIONS 203 /* Avoid ifndef each separate macro setting by wrapping the whole of the 204 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS 205 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS 206 and OBJ_PROCESS_STAB too, without needing the tweaks below. */ 207 208 /* Stabs go in a separate section. */ 209 #define SEPARATE_STAB_SECTIONS 1 210 211 /* We need 12 bytes at the start of the section to hold some initial 212 information. */ 213 extern void obj_elf_init_stab_section (segT); 214 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg) 215 216 #ifdef ECOFF_DEBUGGING 217 /* We smuggle stabs in ECOFF rather than using a separate section. 218 The Irix linker can not handle a separate stabs section. */ 219 220 #undef SEPARATE_STAB_SECTIONS 221 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING) 222 223 #undef INIT_STAB_SECTION 224 #define INIT_STAB_SECTION(seg) \ 225 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0))) 226 227 #undef OBJ_PROCESS_STAB 228 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \ 229 if (ECOFF_DEBUGGING) \ 230 ecoff_stab ((seg), (what), (string), (type), (other), (desc)) 231 #endif /* ECOFF_DEBUGGING */ 232 233 #endif /* SEPARATE_STAB_SECTIONS not defined. */ 234 235 extern void elf_frob_symbol (symbolS *, int *); 236 #ifndef obj_frob_symbol 237 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt) 238 #endif 239 240 extern void elf_pop_insert (void); 241 #ifndef obj_pop_insert 242 #define obj_pop_insert() elf_pop_insert() 243 #endif 244 245 #ifndef OBJ_MAYBE_ELF 246 /* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */ 247 #define obj_ecoff_set_ext elf_ecoff_set_ext 248 struct ecoff_extr; 249 extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *); 250 #endif 251 extern asection *elf_com_section_ptr; 252 extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, 253 addressT size); 254 255 #endif /* _OBJ_ELF_H */ 256