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
  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 #include "bfd.h"
  39
  40 #define BYTES_IN_WORD 4         /* for now */
  41 #include "bfd/elf-bfd.h"
  42
  43 #include "targ-cpu.h"
  44
  45 #ifdef TC_ALPHA
  46 #define ECOFF_DEBUGGING alpha_flag_mdebug
  47 extern int alpha_flag_mdebug;
  48 #endif
  49
  50 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
  51 #ifdef TC_MIPS
  52 #ifdef MIPS_STABS_ELF
  53 #define ECOFF_DEBUGGING 0
  54 #else
  55 #define ECOFF_DEBUGGING 1
  56 #endif /* MIPS_STABS_ELF */
  57 #endif /* TC_MIPS */
  58
  59 #ifdef OBJ_MAYBE_ECOFF
  60 #ifndef ECOFF_DEBUGGING
  61 #define ECOFF_DEBUGGING 1
  62 #endif
  63 #endif
  64
  65 /* Additional information we keep for each symbol.  */
  66 struct elf_obj_sy
  67 {
  68   /* Whether the symbol has been marked as local.  */
  69   int local;
  70
  71   /* Use this to keep track of .size expressions that involve
  72      differences that we can't compute yet.  */
  73   expressionS *size;
  74
  75   /* The name specified by the .symver directive.  */
  76   char *versioned_name;
  77
  78 #ifdef ECOFF_DEBUGGING
  79   /* If we are generating ECOFF debugging information, we need some
  80      additional fields for each symbol.  */
  81   struct efdr *ecoff_file;
  82   struct localsym *ecoff_symbol;
  83   valueT ecoff_extern_size;
  84 #endif
  85 };
  86
  87 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  88
  89 #ifndef FALSE
  90 #define FALSE 0
  91 #define TRUE  !FALSE
  92 #endif
  93
  94 #ifndef obj_begin
  95 #define obj_begin() elf_begin ()
  96 #endif
  97 extern void elf_begin PARAMS ((void));
  98
  99 /* should be conditional on address size! */
 100 #define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))
 101
 102 #ifndef S_GET_SIZE
 103 #define S_GET_SIZE(S) \
 104   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
 105 #endif
 106 #ifndef S_SET_SIZE
 107 #define S_SET_SIZE(S,V) \
 108   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
 109 #endif
 110
 111 #ifndef S_GET_ALIGN
 112 #define S_GET_ALIGN(S) \
 113   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
 114 #endif
 115 #ifndef S_SET_ALIGN
 116 #define S_SET_ALIGN(S,V) \
 117   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
 118 #endif
 119
 120 int elf_s_get_other PARAMS ((symbolS *));
 121 #ifndef S_GET_OTHER
 122 #define S_GET_OTHER(S)  (elf_s_get_other (S))
 123 #endif
 124 #ifndef S_SET_OTHER
 125 #define S_SET_OTHER(S,V) \
 126   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
 127 #endif
 128
 129 extern asection *gdb_section;
 130
 131 #ifndef obj_frob_file
 132 #define obj_frob_file  elf_frob_file
 133 #endif
 134 extern void elf_frob_file PARAMS ((void));
 135
 136 #ifndef obj_frob_file_after_relocs
 137 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
 138 #endif
 139 extern void elf_frob_file_after_relocs PARAMS ((void));
 140
 141 #ifndef obj_app_file
 142 #define obj_app_file elf_file_symbol
 143 #endif
 144 extern void elf_file_symbol PARAMS ((const char *));
 145
 146 extern void obj_elf_section_change_hook PARAMS ((void));
 147
 148 extern void obj_elf_section PARAMS ((int));
 149 extern void obj_elf_previous PARAMS ((int));
 150 extern void obj_elf_version PARAMS ((int));
 151 extern void obj_elf_common PARAMS ((int));
 152 extern void obj_elf_data PARAMS ((int));
 153 extern void obj_elf_text PARAMS ((int));
 154
 155 /* BFD wants to write the udata field, which is a no-no for the
 156    globally defined sections.  */
 157 #ifndef obj_sec_sym_ok_for_reloc
 158 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 159 #endif
 160
 161 void elf_obj_read_begin_hook PARAMS ((void));
 162 #ifndef obj_read_begin_hook
 163 #define obj_read_begin_hook     elf_obj_read_begin_hook
 164 #endif
 165
 166 void elf_obj_symbol_new_hook PARAMS ((symbolS *));
 167 #ifndef obj_symbol_new_hook
 168 #define obj_symbol_new_hook     elf_obj_symbol_new_hook
 169 #endif
 170
 171 /* When setting one symbol equal to another, by default we probably
 172    want them to have the same "size", whatever it means in the current
 173    context.  */
 174 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 175 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)                    \
 176 do                                                              \
 177   {                                                             \
 178     struct elf_obj_sy *srcelf = symbol_get_obj (SRC);           \
 179     struct elf_obj_sy *destelf = symbol_get_obj (DEST);         \
 180     if (srcelf->size)                                           \
 181       {                                                         \
 182         if (destelf->size == NULL)                              \
 183           destelf->size =                                       \
 184             (expressionS *) xmalloc (sizeof (expressionS));     \
 185         *destelf->size = *srcelf->size;                         \
 186       }                                                         \
 187     else                                                        \
 188       {                                                         \
 189         if (destelf->size != NULL)                              \
 190           free (destelf->size);                                 \
 191         destelf->size = NULL;                                   \
 192       }                                                         \
 193     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));                      \
 194     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));                    \
 195   }                                                             \
 196 while (0)
 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.  */
 210 extern void obj_elf_init_stab_section PARAMS ((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
 232 extern void elf_frob_symbol PARAMS ((symbolS *, int *));
 233 #ifndef obj_frob_symbol
 234 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 235 #endif
 236
 237 extern void elf_pop_insert PARAMS ((void));
 238 #ifndef obj_pop_insert
 239 #define obj_pop_insert()        elf_pop_insert()
 240 #endif
 241
 242 #ifndef OBJ_MAYBE_ELF
 243 #define obj_ecoff_set_ext elf_ecoff_set_ext
 244 #ifdef ANSI_PROTOTYPES
 245 struct ecoff_extr;
 246 #endif
 247 extern void elf_ecoff_set_ext PARAMS ((symbolS *, struct ecoff_extr *));
 248 #endif
 249
 250 #endif /* _OBJ_ELF_H */