gas/config/obj-elf.h

   1 /* ELF object file format.
   2    Copyright (C) 1992, 93, 94, 95, 96, 1997 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 1, 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, 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  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 #define OUTPUT_FLAVOR bfd_target_elf_flavour
  31
  32 #include <bfd.h>
  33
  34 #define BYTES_IN_WORD 4         /* for now */
  35 #include "bfd/elf-bfd.h"
  36
  37 /* Additional information we keep for each symbol.  */
  38
  39 /* FIXME: For some reason, this structure is needed both here and in
  40    obj-multi.h.  */
  41 #ifndef OBJ_SYMFIELD_TYPE
  42 struct elf_obj_sy
  43 {
  44   /* Use this to keep track of .size expressions that involve
  45      differences that we can't compute yet.  */
  46   expressionS *size;
  47
  48   /* The name specified by the .symver directive.  */
  49   char *versioned_name;
  50 };
  51 #endif
  52
  53 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  54
  55 /* Symbol fields used by the ELF back end.  */
  56 #define ELF_TARGET_SYMBOL_FIELDS int local:1;
  57
  58 /* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead.  */
  59 #define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS
  60
  61 #include "targ-cpu.h"
  62
  63 #ifndef FALSE
  64 #define FALSE 0
  65 #define TRUE  !FALSE
  66 #endif
  67
  68 #define obj_begin() elf_begin ()
  69 extern void elf_begin PARAMS ((void));
  70
  71 /* should be conditional on address size! */
  72 #define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))
  73
  74 #define S_GET_SIZE(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_size)
  75 #define S_SET_SIZE(S,V) \
  76   (elf_symbol((S)->bsym)->internal_elf_sym.st_size = (V))
  77
  78 #define S_GET_ALIGN(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_value)
  79 #define S_SET_ALIGN(S,V) \
  80   (elf_symbol ((S)->bsym)->internal_elf_sym.st_value = (V))
  81
  82 #define S_GET_OTHER(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_other)
  83 #define S_SET_OTHER(S,V) \
  84   (elf_symbol ((S)->bsym)->internal_elf_sym.st_other = (V))
  85
  86 extern asection *gdb_section;
  87
  88 #define obj_frob_file  elf_frob_file
  89 extern void elf_frob_file PARAMS ((void));
  90
  91 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
  92 extern void elf_frob_file_after_relocs PARAMS ((void));
  93
  94 #define obj_app_file elf_file_symbol
  95 extern void elf_file_symbol PARAMS ((char *));
  96
  97 extern void obj_elf_section_change_hook PARAMS ((void));
  98
  99 extern void obj_elf_section PARAMS ((int));
 100 extern void obj_elf_previous PARAMS ((int));
 101 extern void obj_elf_version PARAMS ((int));
 102
 103 /* BFD wants to write the udata field, which is a no-no for the
 104    globally defined sections.  */
 105 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 106
 107 /* When setting one symbol equal to another, by default we probably
 108    want them to have the same "size", whatever it means in the current
 109    context.  */
 110 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)                    \
 111 do                                                              \
 112   {                                                             \
 113     if ((SRC)->sy_obj.size)                                     \
 114       {                                                         \
 115         if ((DEST)->sy_obj.size == NULL)                        \
 116           (DEST)->sy_obj.size =                                 \
 117             (expressionS *) xmalloc (sizeof (expressionS));     \
 118         *(DEST)->sy_obj.size = *(SRC)->sy_obj.size;             \
 119       }                                                         \
 120     else                                                        \
 121       {                                                         \
 122         if ((DEST)->sy_obj.size != NULL)                        \
 123           free ((DEST)->sy_obj.size);                           \
 124         (DEST)->sy_obj.size = NULL;                             \
 125       }                                                         \
 126     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));                      \
 127     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));                    \
 128   }                                                             \
 129 while (0)
 130
 131 /* Stabs go in a separate section.  */
 132 #define SEPARATE_STAB_SECTIONS 1
 133
 134 /* We need 12 bytes at the start of the section to hold some initial
 135    information.  */
 136 extern void obj_elf_init_stab_section PARAMS ((segT));
 137 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 138
 139 #ifdef TC_ALPHA
 140 #define ECOFF_DEBUGGING alpha_flag_mdebug
 141 extern int alpha_flag_mdebug;
 142 #endif
 143
 144 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
 145 #ifdef TC_MIPS
 146 #ifdef MIPS_STABS_ELF
 147 #define ECOFF_DEBUGGING 0
 148 #else
 149 #define ECOFF_DEBUGGING 1
 150 #endif /* MIPS_STABS_ELF */
 151 #endif /* TC_MIPS */
 152
 153 #ifdef ECOFF_DEBUGGING
 154 /* If we are generating ECOFF debugging information, we need some
 155    additional fields for each symbol.  */
 156 #undef TARGET_SYMBOL_FIELDS
 157 #define TARGET_SYMBOL_FIELDS \
 158   ELF_TARGET_SYMBOL_FIELDS \
 159   struct efdr *ecoff_file; \
 160   struct localsym *ecoff_symbol; \
 161   valueT ecoff_extern_size;
 162
 163 /* We smuggle stabs in ECOFF rather than using a separate section.
 164    The Irix linker can not handle a separate stabs section.  */
 165
 166 #undef  SEPARATE_STAB_SECTIONS
 167 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
 168
 169 #undef  INIT_STAB_SECTION
 170 #define INIT_STAB_SECTION(seg) \
 171   ((void)(ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
 172
 173 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)          \
 174   if (ECOFF_DEBUGGING)                                                  \
 175     ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 176 #endif /* ECOFF_DEBUGGING */
 177
 178 extern void elf_frob_symbol PARAMS ((struct symbol *, int *));
 179 #ifndef obj_frob_symbol
 180 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 181 #endif
 182
 183 extern void elf_pop_insert PARAMS ((void));
 184 #define obj_pop_insert()        elf_pop_insert()
 185
 186 #ifndef OBJ_MAYBE_ELF
 187 #define obj_ecoff_set_ext elf_ecoff_set_ext
 188 #ifdef ANSI_PROTOTYPES
 189 struct ecoff_extr;
 190 #endif
 191 extern void elf_ecoff_set_ext PARAMS ((struct symbol *, struct ecoff_extr *));
 192 #endif
 193
 194 #endif /* _OBJ_ELF_H */