1 /* ELF object file format.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* HP PA-RISC support was contributed by the Center for Software Science
24 at the University of Utah. */
31 /* Note that all macros in this file should be wrapped in #ifndef, for
32 sake of obj-multi.h which includes this file. */
35 #define OUTPUT_FLAVOR bfd_target_elf_flavour
38 #define BYTES_IN_WORD 4 /* for now */
39 #include "bfd/elf-bfd.h"
44 #define ECOFF_DEBUGGING (alpha_flag_mdebug > 0)
45 extern int alpha_flag_mdebug
;
48 /* For now, always set ECOFF_DEBUGGING for a MIPS target. */
50 #define ECOFF_DEBUGGING mips_flag_mdebug
51 extern int mips_flag_mdebug
;
54 #ifdef OBJ_MAYBE_ECOFF
55 #ifndef ECOFF_DEBUGGING
56 #define ECOFF_DEBUGGING 1
60 /* Additional information we keep for each symbol. */
63 /* Whether the symbol has been marked as local. */
66 /* Use this to keep track of .size expressions that involve
67 differences that we can't compute yet. */
70 /* The name specified by the .symver directive. */
73 #ifdef ECOFF_DEBUGGING
74 /* If we are generating ECOFF debugging information, we need some
75 additional fields for each symbol. */
76 struct efdr
*ecoff_file
;
77 struct localsym
*ecoff_symbol
;
78 valueT ecoff_extern_size
;
82 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
90 #define obj_begin() elf_begin ()
92 extern void elf_begin (void);
94 #ifndef LOCAL_LABEL_PREFIX
95 #define LOCAL_LABEL_PREFIX '.'
98 /* should be conditional on address size! */
99 #define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd))
102 #define S_GET_SIZE(S) \
103 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
106 #define S_SET_SIZE(S,V) \
107 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
111 #define S_GET_ALIGN(S) \
112 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
115 #define S_SET_ALIGN(S,V) \
116 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
119 int elf_s_get_other (symbolS
*);
121 #define S_GET_OTHER(S) (elf_s_get_other (S))
124 #define S_SET_OTHER(S,V) \
125 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
128 extern asection
*gdb_section
;
130 #ifndef obj_frob_file
131 #define obj_frob_file elf_frob_file
133 extern void elf_frob_file (void);
135 #ifndef obj_frob_file_before_adjust
136 #define obj_frob_file_before_adjust elf_frob_file_before_adjust
138 extern void elf_frob_file_before_adjust (void);
140 #ifndef obj_frob_file_after_relocs
141 #define obj_frob_file_after_relocs elf_frob_file_after_relocs
143 extern void elf_frob_file_after_relocs (void);
145 /* If the target doesn't have special processing for labels, take care of
146 dwarf2 output at the object file level. */
147 #ifndef tc_frob_label
148 #include "dwarf2dbg.h"
149 #define obj_frob_label dwarf2_emit_label
153 #define obj_app_file elf_file_symbol
155 extern void elf_file_symbol (const char *, int);
157 extern void obj_elf_section_change_hook (void);
159 extern void obj_elf_section (int);
160 extern char * obj_elf_section_name (void);
161 extern void obj_elf_previous (int);
162 extern void obj_elf_version (int);
163 extern void obj_elf_common (int);
164 extern void obj_elf_data (int);
165 extern void obj_elf_text (int);
166 extern void obj_elf_change_section
167 (const char *, int, bfd_vma
, int, const char *, int, int);
168 extern struct fix
*obj_elf_vtable_inherit (int);
169 extern struct fix
*obj_elf_vtable_entry (int);
171 /* BFD wants to write the udata field, which is a no-no for the
172 predefined section symbols in bfd/section.c. They are read-only. */
173 #ifndef obj_sec_sym_ok_for_reloc
174 #define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0)
177 void elf_obj_read_begin_hook (void);
178 #ifndef obj_read_begin_hook
179 #define obj_read_begin_hook elf_obj_read_begin_hook
182 void elf_obj_symbol_new_hook (symbolS
*);
183 #ifndef obj_symbol_new_hook
184 #define obj_symbol_new_hook elf_obj_symbol_new_hook
187 void elf_copy_symbol_attributes (symbolS
*, symbolS
*);
188 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
189 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
190 (elf_copy_symbol_attributes (DEST, SRC))
193 void elf_adjust_symtab (void);
194 #ifndef obj_adjust_symtab
195 #define obj_adjust_symtab elf_adjust_symtab
198 #ifndef SEPARATE_STAB_SECTIONS
199 /* Avoid ifndef each separate macro setting by wrapping the whole of the
200 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
201 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
202 and OBJ_PROCESS_STAB too, without needing the tweaks below. */
204 /* Stabs go in a separate section. */
205 #define SEPARATE_STAB_SECTIONS 1
207 /* We need 12 bytes at the start of the section to hold some initial
209 extern void obj_elf_init_stab_section (segT
);
210 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
212 #ifdef ECOFF_DEBUGGING
213 /* We smuggle stabs in ECOFF rather than using a separate section.
214 The Irix linker can not handle a separate stabs section. */
216 #undef SEPARATE_STAB_SECTIONS
217 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
219 #undef INIT_STAB_SECTION
220 #define INIT_STAB_SECTION(seg) \
221 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
223 #undef OBJ_PROCESS_STAB
224 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \
225 if (ECOFF_DEBUGGING) \
226 ecoff_stab ((seg), (what), (string), (type), (other), (desc))
227 #endif /* ECOFF_DEBUGGING */
229 #endif /* SEPARATE_STAB_SECTIONS not defined. */
231 extern void elf_frob_symbol (symbolS
*, int *);
232 #ifndef obj_frob_symbol
233 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
236 extern void elf_pop_insert (void);
237 #ifndef obj_pop_insert
238 #define obj_pop_insert() elf_pop_insert()
241 #ifndef OBJ_MAYBE_ELF
242 /* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */
243 #define obj_ecoff_set_ext elf_ecoff_set_ext
245 extern void elf_ecoff_set_ext (symbolS
*, struct ecoff_extr
*);
247 extern asection
*elf_com_section_ptr
;
248 extern symbolS
* elf_common_parse (int ignore ATTRIBUTE_UNUSED
, symbolS
*symbolP
,
251 #endif /* _OBJ_ELF_H */
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