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