gas/config/obj-elf.h

   1 /* ELF object file format.
   2    Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99, 2000
   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
  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 #ifdef MIPS_STABS_ELF
  52 #define ECOFF_DEBUGGING 0
  53 #else
  54 #define ECOFF_DEBUGGING 1
  55 #endif /* MIPS_STABS_ELF */
  56 #endif /* TC_MIPS */
  57
  58 #ifdef OBJ_MAYBE_ECOFF
  59 #ifndef ECOFF_DEBUGGING
  60 #define ECOFF_DEBUGGING 1
  61 #endif
  62 #endif
  63
  64 /* Additional information we keep for each symbol.  */
  65 struct elf_obj_sy
  66 {
  67   /* Whether the symbol has been marked as local.  */
  68   int local;
  69
  70   /* Use this to keep track of .size expressions that involve
  71      differences that we can't compute yet.  */
  72   expressionS *size;
  73
  74   /* The name specified by the .symver directive.  */
  75   char *versioned_name;
  76
  77 #ifdef ECOFF_DEBUGGING
  78   /* If we are generating ECOFF debugging information, we need some
  79      additional fields for each symbol.  */
  80   struct efdr *ecoff_file;
  81   struct localsym *ecoff_symbol;
  82   valueT ecoff_extern_size;
  83 #endif
  84 };
  85
  86 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  87
  88 #ifndef FALSE
  89 #define FALSE 0
  90 #define TRUE  !FALSE
  91 #endif
  92
  93 #ifndef obj_begin
  94 #define obj_begin() elf_begin ()
  95 #endif
  96 extern void elf_begin PARAMS ((void));
  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 PARAMS ((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 PARAMS ((void));
 134
 135 #ifndef obj_frob_file_after_relocs
 136 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
 137 #endif
 138 extern void elf_frob_file_after_relocs PARAMS ((void));
 139
 140 #ifndef obj_app_file
 141 #define obj_app_file elf_file_symbol
 142 #endif
 143 extern void elf_file_symbol PARAMS ((const char *));
 144
 145 extern void obj_elf_section_change_hook PARAMS ((void));
 146
 147 extern void obj_elf_section PARAMS ((int));
 148 extern void obj_elf_previous PARAMS ((int));
 149 extern void obj_elf_version PARAMS ((int));
 150 extern void obj_elf_common PARAMS ((int));
 151 extern void obj_elf_data PARAMS ((int));
 152 extern void obj_elf_text PARAMS ((int));
 153 extern struct fix *obj_elf_vtable_inherit PARAMS ((int));
 154 extern struct fix *obj_elf_vtable_entry PARAMS ((int));
 155
 156 /* BFD wants to write the udata field, which is a no-no for the
 157    globally defined sections.  */
 158 #ifndef obj_sec_sym_ok_for_reloc
 159 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 160 #endif
 161
 162 void elf_obj_read_begin_hook PARAMS ((void));
 163 #ifndef obj_read_begin_hook
 164 #define obj_read_begin_hook     elf_obj_read_begin_hook
 165 #endif
 166
 167 void elf_obj_symbol_new_hook PARAMS ((symbolS *));
 168 #ifndef obj_symbol_new_hook
 169 #define obj_symbol_new_hook     elf_obj_symbol_new_hook
 170 #endif
 171
 172 /* When setting one symbol equal to another, by default we probably
 173    want them to have the same "size", whatever it means in the current
 174    context.  */
 175 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 176 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)                    \
 177 do                                                              \
 178   {                                                             \
 179     struct elf_obj_sy *srcelf = symbol_get_obj (SRC);           \
 180     struct elf_obj_sy *destelf = symbol_get_obj (DEST);         \
 181     if (srcelf->size)                                           \
 182       {                                                         \
 183         if (destelf->size == NULL)                              \
 184           destelf->size =                                       \
 185             (expressionS *) xmalloc (sizeof (expressionS));     \
 186         *destelf->size = *srcelf->size;                         \
 187       }                                                         \
 188     else                                                        \
 189       {                                                         \
 190         if (destelf->size != NULL)                              \
 191           free (destelf->size);                                 \
 192         destelf->size = NULL;                                   \
 193       }                                                         \
 194     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));                      \
 195     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));                    \
 196   }                                                             \
 197 while (0)
 198 #endif
 199
 200 #ifndef SEPARATE_STAB_SECTIONS
 201 /* Avoid ifndef each separate macro setting by wrapping the whole of the
 202    stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
 203    caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
 204    and OBJ_PROCESS_STAB too, without needing the tweaks below.  */
 205
 206 /* Stabs go in a separate section.  */
 207 #define SEPARATE_STAB_SECTIONS 1
 208
 209 /* We need 12 bytes at the start of the section to hold some initial
 210    information.  */
 211 extern void obj_elf_init_stab_section PARAMS ((segT));
 212 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 213
 214 #ifdef ECOFF_DEBUGGING
 215 /* We smuggle stabs in ECOFF rather than using a separate section.
 216    The Irix linker can not handle a separate stabs section.  */
 217
 218 #undef  SEPARATE_STAB_SECTIONS
 219 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
 220
 221 #undef  INIT_STAB_SECTION
 222 #define INIT_STAB_SECTION(seg) \
 223   ((void)(ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
 224
 225 #undef OBJ_PROCESS_STAB
 226 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)          \
 227   if (ECOFF_DEBUGGING)                                                  \
 228     ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 229 #endif /* ECOFF_DEBUGGING */
 230
 231 #endif /* SEPARATE_STAB_SECTIONS not defined.  */
 232
 233 extern void elf_frob_symbol PARAMS ((symbolS *, int *));
 234 #ifndef obj_frob_symbol
 235 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 236 #endif
 237
 238 extern void elf_pop_insert PARAMS ((void));
 239 #ifndef obj_pop_insert
 240 #define obj_pop_insert()        elf_pop_insert()
 241 #endif
 242
 243 #ifndef OBJ_MAYBE_ELF
 244 #define obj_ecoff_set_ext elf_ecoff_set_ext
 245 #ifdef ANSI_PROTOTYPES
 246 struct ecoff_extr;
 247 #endif
 248 extern void elf_ecoff_set_ext PARAMS ((symbolS *, struct ecoff_extr *));
 249 #endif
 250
 251 #endif /* _OBJ_ELF_H */