gas/config/obj-elf.h

   1 /* ELF object file format.
   2    Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 1999
   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 #define OUTPUT_FLAVOR bfd_target_elf_flavour
  32
  33 #include <bfd.h>
  34
  35 #define BYTES_IN_WORD 4         /* for now */
  36 #include "bfd/elf-bfd.h"
  37
  38 #include "targ-cpu.h"
  39
  40 #ifdef TC_ALPHA
  41 #define ECOFF_DEBUGGING alpha_flag_mdebug
  42 extern int alpha_flag_mdebug;
  43 #endif
  44
  45 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
  46 #ifdef TC_MIPS
  47 #ifdef MIPS_STABS_ELF
  48 #define ECOFF_DEBUGGING 0
  49 #else
  50 #define ECOFF_DEBUGGING 1
  51 #endif /* MIPS_STABS_ELF */
  52 #endif /* TC_MIPS */
  53
  54 /* Additional information we keep for each symbol.  */
  55
  56 /* FIXME: For some reason, this structure is needed both here and in
  57    obj-multi.h.  */
  58 #ifndef OBJ_SYMFIELD_TYPE
  59 struct elf_obj_sy
  60 {
  61   /* Whether the symbol has been marked as local.  */
  62   int local;
  63
  64   /* Use this to keep track of .size expressions that involve
  65      differences that we can't compute yet.  */
  66   expressionS *size;
  67
  68   /* The name specified by the .symver directive.  */
  69   char *versioned_name;
  70
  71 #ifdef ECOFF_DEBUGGING
  72   /* If we are generating ECOFF debugging information, we need some
  73      additional fields for each symbol.  */
  74   struct efdr *ecoff_file;
  75   struct localsym *ecoff_symbol;
  76   valueT ecoff_extern_size;
  77 #endif
  78 };
  79 #endif
  80
  81 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  82
  83 #ifndef FALSE
  84 #define FALSE 0
  85 #define TRUE  !FALSE
  86 #endif
  87
  88 #define obj_begin() elf_begin ()
  89 extern void elf_begin PARAMS ((void));
  90
  91 /* should be conditional on address size! */
  92 #define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))
  93
  94 #define S_GET_SIZE(S) \
  95   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
  96 #define S_SET_SIZE(S,V) \
  97   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
  98
  99 #define S_GET_ALIGN(S) \
 100   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
 101 #define S_SET_ALIGN(S,V) \
 102   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
 103
 104 #define S_GET_OTHER(S) \
 105   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other)
 106 #define S_SET_OTHER(S,V) \
 107   (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
 108
 109 extern asection *gdb_section;
 110
 111 #define obj_frob_file  elf_frob_file
 112 extern void elf_frob_file PARAMS ((void));
 113
 114 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
 115 extern void elf_frob_file_after_relocs PARAMS ((void));
 116
 117 #define obj_app_file elf_file_symbol
 118 extern void elf_file_symbol PARAMS ((char *));
 119
 120 extern void obj_elf_section_change_hook PARAMS ((void));
 121
 122 extern void obj_elf_section PARAMS ((int));
 123 extern void obj_elf_previous PARAMS ((int));
 124 extern void obj_elf_version PARAMS ((int));
 125
 126 /* BFD wants to write the udata field, which is a no-no for the
 127    globally defined sections.  */
 128 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 129
 130 /* When setting one symbol equal to another, by default we probably
 131    want them to have the same "size", whatever it means in the current
 132    context.  */
 133 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)                    \
 134 do                                                              \
 135   {                                                             \
 136     struct elf_obj_sy *srcelf = symbol_get_obj (SRC);           \
 137     struct elf_obj_sy *destelf = symbol_get_obj (DEST);         \
 138     if (srcelf->size)                                           \
 139       {                                                         \
 140         if (destelf->size == NULL)                              \
 141           destelf->size =                                       \
 142             (expressionS *) xmalloc (sizeof (expressionS));     \
 143         *destelf->size = *srcelf->size;                         \
 144       }                                                         \
 145     else                                                        \
 146       {                                                         \
 147         if (destelf->size != NULL)                              \
 148           free (destelf->size);                                 \
 149         destelf->size = NULL;                                   \
 150       }                                                         \
 151     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));                      \
 152     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));                    \
 153   }                                                             \
 154 while (0)
 155
 156 /* Stabs go in a separate section.  */
 157 #define SEPARATE_STAB_SECTIONS 1
 158
 159 /* We need 12 bytes at the start of the section to hold some initial
 160    information.  */
 161 extern void obj_elf_init_stab_section PARAMS ((segT));
 162 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 163
 164 #ifdef ECOFF_DEBUGGING
 165 /* We smuggle stabs in ECOFF rather than using a separate section.
 166    The Irix linker can not handle a separate stabs section.  */
 167
 168 #undef  SEPARATE_STAB_SECTIONS
 169 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
 170
 171 #undef  INIT_STAB_SECTION
 172 #define INIT_STAB_SECTION(seg) \
 173   ((void)(ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
 174
 175 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)          \
 176   if (ECOFF_DEBUGGING)                                                  \
 177     ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 178 #endif /* ECOFF_DEBUGGING */
 179
 180 extern void elf_frob_symbol PARAMS ((symbolS *, int *));
 181 #ifndef obj_frob_symbol
 182 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 183 #endif
 184
 185 extern void elf_pop_insert PARAMS ((void));
 186 #define obj_pop_insert()        elf_pop_insert()
 187
 188 #ifndef OBJ_MAYBE_ELF
 189 #define obj_ecoff_set_ext elf_ecoff_set_ext
 190 #ifdef ANSI_PROTOTYPES
 191 struct ecoff_extr;
 192 #endif
 193 extern void elf_ecoff_set_ext PARAMS ((symbolS *, struct ecoff_extr *));
 194 #endif
 195
 196 #endif /* _OBJ_ELF_H */