1 /* ELF object file format.
2 Copyright (C) 1992-2017 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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 3, or (at your option)
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.
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, 51 Franklin Street - Fifth Floor, Boston, MA
21 /* HP PA-RISC support was contributed by the Center for Software Science
22 at the University of Utah. */
29 /* Note that all macros in this file should be wrapped in #ifndef, for
30 sake of obj-multi.h which includes this file. */
33 #define OUTPUT_FLAVOR bfd_target_elf_flavour
36 #define BYTES_IN_WORD 4 /* for now */
37 #include "bfd/elf-bfd.h"
42 #define ECOFF_DEBUGGING (alpha_flag_mdebug > 0)
43 extern int alpha_flag_mdebug
;
46 /* For now, always set ECOFF_DEBUGGING for a MIPS target. */
48 #define ECOFF_DEBUGGING mips_flag_mdebug
49 extern int mips_flag_mdebug
;
52 #ifdef OBJ_MAYBE_ECOFF
53 #ifndef ECOFF_DEBUGGING
54 #define ECOFF_DEBUGGING 1
58 /* Additional information we keep for each symbol. */
61 /* Whether the symbol has been marked as local. */
64 /* Use this to keep track of .size expressions that involve
65 differences that we can't compute yet. */
68 /* The name specified by the .symver directive. */
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
;
80 #define OBJ_SYMFIELD_TYPE struct elf_obj_sy
88 #define obj_begin() elf_begin ()
90 extern void elf_begin (void);
92 #ifndef LOCAL_LABEL_PREFIX
93 #define LOCAL_LABEL_PREFIX '.'
96 /* should be conditional on address size! */
97 #define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd))
100 #define S_GET_SIZE(S) \
101 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
104 #define S_SET_SIZE(S,V) \
105 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
109 #define S_GET_ALIGN(S) \
110 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
113 #define S_SET_ALIGN(S,V) \
114 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
117 int elf_s_get_other (symbolS
*);
119 #define S_GET_OTHER(S) (elf_s_get_other (S))
122 #define S_SET_OTHER(S,V) \
123 (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
126 extern asection
*gdb_section
;
128 #ifndef obj_frob_file
129 #define obj_frob_file elf_frob_file
131 extern void elf_frob_file (void);
133 #ifndef obj_frob_file_before_adjust
134 #define obj_frob_file_before_adjust elf_frob_file_before_adjust
136 extern void elf_frob_file_before_adjust (void);
138 #ifndef obj_frob_file_after_relocs
139 #define obj_frob_file_after_relocs elf_frob_file_after_relocs
141 extern void elf_frob_file_after_relocs (void);
143 /* If the target doesn't have special processing for labels, take care of
144 dwarf2 output at the object file level. */
145 #ifndef tc_frob_label
146 #include "dwarf2dbg.h"
147 #define obj_frob_label dwarf2_emit_label
151 #define obj_app_file elf_file_symbol
153 extern void elf_file_symbol (const char *, int);
155 extern void obj_elf_section_change_hook (void);
157 extern void obj_elf_section (int);
158 extern const char * obj_elf_section_name (void);
159 extern void obj_elf_previous (int);
160 extern void obj_elf_version (int);
161 extern void obj_elf_common (int);
162 extern void obj_elf_data (int);
163 extern void obj_elf_text (int);
164 extern void obj_elf_change_section
165 (const char *, unsigned int, unsigned int, bfd_vma
, int, const char *,
167 extern struct fix
*obj_elf_vtable_inherit (int);
168 extern struct fix
*obj_elf_vtable_entry (int);
169 extern bfd_boolean obj_elf_seen_attribute
171 extern int obj_elf_vendor_attribute (int);
173 /* BFD wants to write the udata field, which is a no-no for the
174 predefined section symbols in bfd/section.c. They are read-only. */
175 #ifndef obj_sec_sym_ok_for_reloc
176 #define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0)
179 void elf_obj_read_begin_hook (void);
180 #ifndef obj_read_begin_hook
181 #define obj_read_begin_hook elf_obj_read_begin_hook
184 void elf_obj_symbol_new_hook (symbolS
*);
185 #ifndef obj_symbol_new_hook
186 #define obj_symbol_new_hook elf_obj_symbol_new_hook
189 void elf_copy_symbol_attributes (symbolS
*, symbolS
*);
190 #ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
191 #define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
192 (elf_copy_symbol_attributes (DEST, SRC))
195 void elf_adjust_symtab (void);
196 #ifndef obj_adjust_symtab
197 #define obj_adjust_symtab elf_adjust_symtab
200 #ifndef SEPARATE_STAB_SECTIONS
201 /* Avoid ifndef each separate macro setting by wrapping the whole of the
202 stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
203 caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
204 and OBJ_PROCESS_STAB too, without needing the tweaks below. */
206 /* Stabs go in a separate section. */
207 #define SEPARATE_STAB_SECTIONS 1
209 /* We need 12 bytes at the start of the section to hold some initial
211 extern void obj_elf_init_stab_section (segT
);
212 #define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
214 #ifdef ECOFF_DEBUGGING
215 /* We smuggle stabs in ECOFF rather than using a separate section.
216 The Irix linker can not handle a separate stabs section. */
218 #undef SEPARATE_STAB_SECTIONS
219 #define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
221 #undef INIT_STAB_SECTION
222 #define INIT_STAB_SECTION(seg) \
223 ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
225 #undef OBJ_PROCESS_STAB
226 #define OBJ_PROCESS_STAB(seg, what, string, type, other, desc) \
227 if (ECOFF_DEBUGGING) \
228 ecoff_stab ((seg), (what), (string), (type), (other), (desc))
229 #endif /* ECOFF_DEBUGGING */
231 #endif /* SEPARATE_STAB_SECTIONS not defined. */
233 extern void elf_frob_symbol (symbolS
*, int *);
234 #ifndef obj_frob_symbol
235 #define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
238 extern void elf_pop_insert (void);
239 #ifndef obj_pop_insert
240 #define obj_pop_insert() elf_pop_insert()
243 #ifndef OBJ_MAYBE_ELF
244 /* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext. */
245 #define obj_ecoff_set_ext elf_ecoff_set_ext
247 extern void elf_ecoff_set_ext (symbolS
*, struct ecoff_extr
*);
249 extern asection
*elf_com_section_ptr
;
250 extern symbolS
* elf_common_parse (int ignore ATTRIBUTE_UNUSED
, symbolS
*symbolP
,
253 #endif /* _OBJ_ELF_H */