gas/config/obj-elf.h

   1 /* ELF object file format.
   2    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   3    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, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, 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 #include "bfd.h"
  38
  39 #define BYTES_IN_WORD 4         /* for now */
  40 #include "bfd/elf-bfd.h"
  41
  42 #include "targ-cpu.h"
  43
  44 #ifdef TC_ALPHA
  45 #define ECOFF_DEBUGGING (alpha_flag_mdebug > 0)
  46 extern int alpha_flag_mdebug;
  47 #endif
  48
  49 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
  50 #ifdef TC_MIPS
  51 #define ECOFF_DEBUGGING mips_flag_mdebug
  52 extern int mips_flag_mdebug;
  53 #endif /* TC_MIPS */
  54
  55 #ifdef OBJ_MAYBE_ECOFF
  56 #ifndef ECOFF_DEBUGGING
  57 #define ECOFF_DEBUGGING 1
  58 #endif
  59 #endif
  60
  61 /* Additional information we keep for each symbol.  */
  62 struct elf_obj_sy
  63 {
  64   /* Whether the symbol has been marked as local.  */
  65   int local;
  66
  67   /* Use this to keep track of .size expressions that involve
  68      differences that we can't compute yet.  */
  69   expressionS *size;
  70
  71   /* The name specified by the .symver directive.  */
  72   char *versioned_name;
  73
  74 #ifdef ECOFF_DEBUGGING
  75   /* If we are generating ECOFF debugging information, we need some
  76      additional fields for each symbol.  */
  77   struct efdr *ecoff_file;
  78   struct localsym *ecoff_symbol;
  79   valueT ecoff_extern_size;
  80 #endif
  81 };
  82
  83 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  84
  85 /* Symbol fields used by the ELF back end.  */
  86 #define ELF_TARGET_SYMBOL_FIELDS int local:1;
  87
  88 /* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead.  */
  89 #ifndef TARGET_SYMBOL_FIELDS
  90 #define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS
  91 #endif
  92
  93 /* #include "targ-cpu.h" */
  94
  95 #ifndef FALSE
  96 #define FALSE 0
  97 #define TRUE  !FALSE
  98 #endif
  99
 100 #ifndef obj_begin
 101 #define obj_begin() elf_begin ()
 102 #endif
 103 extern void elf_begin PARAMS ((void));
 104
 105 /* should be conditional on address size! */
 106 #define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd))
 107
 108 #ifndef S_GET_SIZE
 109 #define S_GET_SIZE(S) \
 110   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
 111 #endif
 112 #ifndef S_SET_SIZE
 113 #define S_SET_SIZE(S,V) \
 114   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
 115 #endif
 116
 117 #ifndef S_GET_ALIGN
 118 #define S_GET_ALIGN(S) \
 119   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
 120 #endif
 121 #ifndef S_SET_ALIGN
 122 #define S_SET_ALIGN(S,V) \
 123   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
 124 #endif
 125
 126 int elf_s_get_other PARAMS ((symbolS *));
 127 #ifndef S_GET_OTHER
 128 #define S_GET_OTHER(S)  (elf_s_get_other (S))
 129 #endif
 130 #ifndef S_SET_OTHER
 131 #define S_SET_OTHER(S,V) \
 132   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
 133 #endif
 134
 135 extern asection *gdb_section;
 136
 137 #ifndef obj_frob_file
 138 #define obj_frob_file  elf_frob_file
 139 #endif
 140 extern void elf_frob_file PARAMS ((void));
 141
 142 #ifndef obj_frob_file_before_adjust
 143 #define obj_frob_file_before_adjust  elf_frob_file_before_adjust
 144 #endif
 145 extern void elf_frob_file_before_adjust PARAMS ((void));
 146
 147 #ifndef obj_frob_file_after_relocs
 148 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
 149 #endif
 150 extern void elf_frob_file_after_relocs PARAMS ((void));
 151
 152 #ifndef obj_app_file
 153 #define obj_app_file elf_file_symbol
 154 #endif
 155 extern void elf_file_symbol PARAMS ((const char *));
 156
 157 extern void obj_elf_section_change_hook PARAMS ((void));
 158
 159 extern void obj_elf_section PARAMS ((int));
 160 extern void obj_elf_previous PARAMS ((int));
 161 extern void obj_elf_version PARAMS ((int));
 162 extern void obj_elf_common PARAMS ((int));
 163 extern void obj_elf_data PARAMS ((int));
 164 extern void obj_elf_text PARAMS ((int));
 165 extern void obj_elf_change_section
 166   PARAMS ((const char *, int, int, int, const char *, int, int));
 167 extern struct fix *obj_elf_vtable_inherit PARAMS ((int));
 168 extern struct fix *obj_elf_vtable_entry PARAMS ((int));
 169
 170 /* BFD wants to write the udata field, which is a no-no for the
 171    predefined section symbols in bfd/section.c.  They are read-only.  */
 172 #ifndef obj_sec_sym_ok_for_reloc
 173 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 174 #endif
 175
 176 void elf_obj_read_begin_hook PARAMS ((void));
 177 #ifndef obj_read_begin_hook
 178 #define obj_read_begin_hook     elf_obj_read_begin_hook
 179 #endif
 180
 181 void elf_obj_symbol_new_hook PARAMS ((symbolS *));
 182 #ifndef obj_symbol_new_hook
 183 #define obj_symbol_new_hook     elf_obj_symbol_new_hook
 184 #endif
 185
 186 void elf_copy_symbol_attributes PARAMS ((symbolS *, symbolS *));
 187 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 188 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
 189   (elf_copy_symbol_attributes (DEST, SRC))
 190 #endif
 191
 192 #ifndef SEPARATE_STAB_SECTIONS
 193 /* Avoid ifndef each separate macro setting by wrapping the whole of the
 194    stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
 195    caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
 196    and OBJ_PROCESS_STAB too, without needing the tweaks below.  */
 197
 198 /* Stabs go in a separate section.  */
 199 #define SEPARATE_STAB_SECTIONS 1
 200
 201 /* We need 12 bytes at the start of the section to hold some initial
 202    information.  */
 203 extern void obj_elf_init_stab_section PARAMS ((segT));
 204 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 205
 206 #ifdef ECOFF_DEBUGGING
 207 /* We smuggle stabs in ECOFF rather than using a separate section.
 208    The Irix linker can not handle a separate stabs section.  */
 209
 210 #undef  SEPARATE_STAB_SECTIONS
 211 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
 212
 213 #undef  INIT_STAB_SECTION
 214 #define INIT_STAB_SECTION(seg) \
 215   ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
 216
 217 #undef OBJ_PROCESS_STAB
 218 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)          \
 219   if (ECOFF_DEBUGGING)                                                  \
 220     ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 221 #endif /* ECOFF_DEBUGGING */
 222
 223 #endif /* SEPARATE_STAB_SECTIONS not defined.  */
 224
 225 extern void elf_frob_symbol PARAMS ((symbolS *, int *));
 226 #ifndef obj_frob_symbol
 227 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 228 #endif
 229
 230 extern void elf_pop_insert PARAMS ((void));
 231 #ifndef obj_pop_insert
 232 #define obj_pop_insert()        elf_pop_insert()
 233 #endif
 234
 235 #ifndef OBJ_MAYBE_ELF
 236 #define obj_ecoff_set_ext elf_ecoff_set_ext
 237 #ifdef ANSI_PROTOTYPES
 238 struct ecoff_extr;
 239 #endif
 240 extern void elf_ecoff_set_ext PARAMS ((symbolS *, struct ecoff_extr *));
 241 #endif
 242
 243 #endif /* _OBJ_ELF_H */