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 1, 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 #ifndef OUTPUT_FLAVOR
  32 #define OUTPUT_FLAVOR bfd_target_elf_flavour
  33 #endif
  34
  35 #include "bfd.h"
  36
  37 #define BYTES_IN_WORD 4         /* for now */
  38 #include "bfd/elf-bfd.h"
  39
  40 #include "targ-cpu.h"
  41
  42 #ifdef TC_ALPHA
  43 #define ECOFF_DEBUGGING alpha_flag_mdebug
  44 extern int alpha_flag_mdebug;
  45 #endif
  46
  47 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
  48 #ifdef TC_MIPS
  49 #ifdef MIPS_STABS_ELF
  50 #define ECOFF_DEBUGGING 0
  51 #else
  52 #define ECOFF_DEBUGGING 1
  53 #endif /* MIPS_STABS_ELF */
  54 #endif /* TC_MIPS */
  55
  56 #ifdef OBJ_MAYBE_ECOFF
  57 #ifndef ECOFF_DEBUGGING
  58 #define ECOFF_DEBUGGING 1
  59 #endif
  60 #endif
  61
  62 /* Additional information we keep for each symbol.  */
  63 struct elf_obj_sy
  64 {
  65   /* Whether the symbol has been marked as local.  */
  66   int local;
  67
  68   /* Use this to keep track of .size expressions that involve
  69      differences that we can't compute yet.  */
  70   expressionS *size;
  71
  72   /* The name specified by the .symver directive.  */
  73   char *versioned_name;
  74
  75 #ifdef ECOFF_DEBUGGING
  76   /* If we are generating ECOFF debugging information, we need some
  77      additional fields for each symbol.  */
  78   struct efdr *ecoff_file;
  79   struct localsym *ecoff_symbol;
  80   valueT ecoff_extern_size;
  81 #endif
  82 };
  83
  84 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  85
  86 #ifndef FALSE
  87 #define FALSE 0
  88 #define TRUE  !FALSE
  89 #endif
  90
  91 #define obj_begin() elf_begin ()
  92 extern void elf_begin PARAMS ((void));
  93
  94 /* should be conditional on address size! */
  95 #define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))
  96
  97 #ifndef S_GET_SIZE
  98 #define S_GET_SIZE(S) \
  99   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
 100 #endif
 101 #ifndef S_SET_SIZE
 102 #define S_SET_SIZE(S,V) \
 103   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
 104 #endif
 105
 106 #ifndef S_GET_ALIGN
 107 #define S_GET_ALIGN(S) \
 108   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
 109 #endif
 110 #ifndef S_SET_ALIGN
 111 #define S_SET_ALIGN(S,V) \
 112   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
 113 #endif
 114
 115 int elf_s_get_other PARAMS ((symbolS *));
 116 #ifndef S_GET_OTHER
 117 #define S_GET_OTHER(S)  (elf_s_get_other (S))
 118 #endif
 119 #ifndef S_SET_OTHER
 120 #define S_SET_OTHER(S,V) \
 121   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
 122 #endif
 123
 124 extern asection *gdb_section;
 125
 126 #ifndef obj_frob_file
 127 #define obj_frob_file  elf_frob_file
 128 #endif
 129 extern void elf_frob_file PARAMS ((void));
 130
 131 #ifndef obj_frob_file_after_relocs
 132 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
 133 #endif
 134 extern void elf_frob_file_after_relocs PARAMS ((void));
 135
 136 #define obj_app_file elf_file_symbol
 137 extern void elf_file_symbol PARAMS ((char *));
 138
 139 extern void obj_elf_section_change_hook PARAMS ((void));
 140
 141 extern void obj_elf_section PARAMS ((int));
 142 extern void obj_elf_previous PARAMS ((int));
 143 extern void obj_elf_version PARAMS ((int));
 144 extern void obj_elf_common PARAMS ((int));
 145 extern void obj_elf_data PARAMS ((int));
 146 extern void obj_elf_text PARAMS ((int));
 147
 148 /* BFD wants to write the udata field, which is a no-no for the
 149    globally defined sections.  */
 150 #ifndef obj_sec_sym_ok_for_reloc
 151 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 152 #endif
 153
 154 void elf_obj_read_begin_hook PARAMS ((void));
 155 #ifndef obj_read_begin_hook
 156 #define obj_read_begin_hook     elf_obj_read_begin_hook
 157 #endif
 158
 159 void elf_obj_symbol_new_hook PARAMS ((symbolS *));
 160 #ifndef obj_symbol_new_hook
 161 #define obj_symbol_new_hook     elf_obj_symbol_new_hook
 162 #endif
 163
 164 /* When setting one symbol equal to another, by default we probably
 165    want them to have the same "size", whatever it means in the current
 166    context.  */
 167 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
 168 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)                    \
 169 do                                                              \
 170   {                                                             \
 171     struct elf_obj_sy *srcelf = symbol_get_obj (SRC);           \
 172     struct elf_obj_sy *destelf = symbol_get_obj (DEST);         \
 173     if (srcelf->size)                                           \
 174       {                                                         \
 175         if (destelf->size == NULL)                              \
 176           destelf->size =                                       \
 177             (expressionS *) xmalloc (sizeof (expressionS));     \
 178         *destelf->size = *srcelf->size;                         \
 179       }                                                         \
 180     else                                                        \
 181       {                                                         \
 182         if (destelf->size != NULL)                              \
 183           free (destelf->size);                                 \
 184         destelf->size = NULL;                                   \
 185       }                                                         \
 186     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));                      \
 187     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));                    \
 188   }                                                             \
 189 while (0)
 190 #endif
 191
 192 /* Stabs go in a separate section.  */
 193 #define SEPARATE_STAB_SECTIONS 1
 194
 195 /* We need 12 bytes at the start of the section to hold some initial
 196    information.  */
 197 extern void obj_elf_init_stab_section PARAMS ((segT));
 198 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 199
 200 #ifdef ECOFF_DEBUGGING
 201 /* We smuggle stabs in ECOFF rather than using a separate section.
 202    The Irix linker can not handle a separate stabs section.  */
 203
 204 #undef  SEPARATE_STAB_SECTIONS
 205 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
 206
 207 #undef  INIT_STAB_SECTION
 208 #define INIT_STAB_SECTION(seg) \
 209   ((void)(ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
 210
 211 #undef OBJ_PROCESS_STAB
 212 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)          \
 213   if (ECOFF_DEBUGGING)                                                  \
 214     ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 215 #endif /* ECOFF_DEBUGGING */
 216
 217 extern void elf_frob_symbol PARAMS ((symbolS *, int *));
 218 #ifndef obj_frob_symbol
 219 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 220 #endif
 221
 222 extern void elf_pop_insert PARAMS ((void));
 223 #ifndef obj_pop_insert
 224 #define obj_pop_insert()        elf_pop_insert()
 225 #endif
 226
 227 #ifndef OBJ_MAYBE_ELF
 228 #define obj_ecoff_set_ext elf_ecoff_set_ext
 229 #ifdef ANSI_PROTOTYPES
 230 struct ecoff_extr;
 231 #endif
 232 extern void elf_ecoff_set_ext PARAMS ((symbolS *, struct ecoff_extr *));
 233 #endif
 234
 235 #endif /* _OBJ_ELF_H */