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 struct elf_obj_sy
  40 {
  41   /* Use this to keep track of .size expressions that involve
  42      differences that we can't compute yet.  */
  43   expressionS *size;
  44
  45   /* The name specified by the .symver directive.  */
  46   char *versioned_name;
  47 };
  48
  49 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
  50
  51 /* Symbol fields used by the ELF back end.  */
  52 #define ELF_TARGET_SYMBOL_FIELDS int local:1;
  53
  54 /* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead.  */
  55 #define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS
  56
  57 #include "targ-cpu.h"
  58
  59 #ifndef FALSE
  60 #define FALSE 0
  61 #define TRUE  !FALSE
  62 #endif
  63
  64 #define obj_begin() elf_begin ()
  65 extern void elf_begin PARAMS ((void));
  66
  67 /* should be conditional on address size! */
  68 #define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))
  69
  70 #define S_GET_SIZE(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_size)
  71 #define S_SET_SIZE(S,V) \
  72   (elf_symbol((S)->bsym)->internal_elf_sym.st_size = (V))
  73
  74 #define S_GET_ALIGN(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_value)
  75 #define S_SET_ALIGN(S,V) \
  76   (elf_symbol ((S)->bsym)->internal_elf_sym.st_value = (V))
  77
  78 #define S_GET_OTHER(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_other)
  79 #define S_SET_OTHER(S,V) \
  80   (elf_symbol ((S)->bsym)->internal_elf_sym.st_other = (V))
  81
  82 extern asection *gdb_section;
  83
  84 #define obj_frob_file  elf_frob_file
  85 extern void elf_frob_file PARAMS ((void));
  86
  87 #define obj_frob_file_after_relocs  elf_frob_file_after_relocs
  88 extern void elf_frob_file_after_relocs PARAMS ((void));
  89
  90 #define obj_app_file elf_file_symbol
  91 extern void elf_file_symbol PARAMS ((char *));
  92
  93 extern void obj_elf_section PARAMS ((int));
  94 extern void obj_elf_previous PARAMS ((int));
  95 extern void obj_elf_version PARAMS ((int));
  96
  97 /* BFD wants to write the udata field, which is a no-no for the
  98    globally defined sections.  */
  99 #define obj_sec_sym_ok_for_reloc(SEC)   ((SEC)->owner != 0)
 100
 101 /* When setting one symbol equal to another, by default we probably
 102    want them to have the same "size", whatever it means in the current
 103    context.  */
 104 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)            \
 105 do                                                      \
 106   {                                                     \
 107     S_SET_SIZE ((DEST), S_GET_SIZE (SRC));              \
 108     S_SET_OTHER ((DEST), S_GET_OTHER (SRC));            \
 109   }                                                     \
 110 while (0)
 111
 112 /* Stabs go in a separate section.  */
 113 #define SEPARATE_STAB_SECTIONS 1
 114
 115 /* We need 12 bytes at the start of the section to hold some initial
 116    information.  */
 117 extern void obj_elf_init_stab_section PARAMS ((segT));
 118 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
 119
 120 /* For now, always set ECOFF_DEBUGGING for an Alpha target.  */
 121 #ifdef TC_ALPHA
 122 #define ECOFF_DEBUGGING 1
 123 #endif
 124
 125 /* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
 126 #ifdef TC_MIPS
 127 #define ECOFF_DEBUGGING 1
 128 #endif
 129
 130 #if ECOFF_DEBUGGING
 131
 132 /* If we are generating ECOFF debugging information, we need some
 133    additional fields for each symbol.  */
 134 #undef TARGET_SYMBOL_FIELDS
 135 #define TARGET_SYMBOL_FIELDS \
 136   ELF_TARGET_SYMBOL_FIELDS \
 137   struct efdr *ecoff_file; \
 138   struct localsym *ecoff_symbol; \
 139   valueT ecoff_extern_size;
 140
 141 /* We smuggle stabs in ECOFF rather than using a separate section.
 142    The Irix linker can not handle a separate stabs section.  */
 143 #undef SEPARATE_STAB_SECTIONS
 144 #undef INIT_STAB_SECTION
 145 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \
 146   ecoff_stab ((seg), (what), (string), (type), (other), (desc))
 147
 148 #define OBJ_GENERATE_ASM_LINENO(filename, lineno) \
 149   ecoff_generate_asm_lineno ((filename), (lineno))
 150
 151 #endif /* ECOFF_DEBUGGING */
 152
 153 extern void elf_frob_symbol PARAMS ((struct symbol *, int *));
 154 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
 155
 156 extern void elf_pop_insert PARAMS ((void));
 157 #define obj_pop_insert()        elf_pop_insert()
 158
 159 #ifndef OBJ_MAYBE_ELF
 160 #define obj_ecoff_set_ext elf_ecoff_set_ext
 161 extern void elf_ecoff_set_ext ();
 162 #endif
 163
 164 #endif /* _OBJ_ELF_H */