1/* ELF object file format.
2   Copyright (C) 1992-2017 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
19   02110-1301, USA.  */
20
21/* HP PA-RISC support was contributed by the Center for Software Science
22   at the University of Utah.  */
23
24#ifndef _OBJ_ELF_H
25#define _OBJ_ELF_H
26
27#define OBJ_ELF 1
28
29/* Note that all macros in this file should be wrapped in #ifndef, for
30   sake of obj-multi.h which includes this file.  */
31
32#ifndef OUTPUT_FLAVOR
33#define OUTPUT_FLAVOR bfd_target_elf_flavour
34#endif
35
36#define BYTES_IN_WORD 4		/* for now */
37#include "bfd/elf-bfd.h"
38
39#include "targ-cpu.h"
40
41#ifdef TC_ALPHA
42#define ECOFF_DEBUGGING (alpha_flag_mdebug > 0)
43extern int alpha_flag_mdebug;
44#endif
45
46/* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
47#ifdef TC_MIPS
48#define ECOFF_DEBUGGING mips_flag_mdebug
49extern int mips_flag_mdebug;
50#endif /* TC_MIPS */
51
52#ifdef OBJ_MAYBE_ECOFF
53#ifndef ECOFF_DEBUGGING
54#define ECOFF_DEBUGGING 1
55#endif
56#endif
57
58/* Additional information we keep for each symbol.  */
59struct 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
80#define OBJ_SYMFIELD_TYPE struct elf_obj_sy
81
82#ifndef FALSE
83#define FALSE 0
84#define TRUE  !FALSE
85#endif
86
87#ifndef obj_begin
88#define obj_begin() elf_begin ()
89#endif
90extern void elf_begin (void);
91
92#ifndef LOCAL_LABEL_PREFIX
93#define LOCAL_LABEL_PREFIX '.'
94#endif
95
96/* should be conditional on address size! */
97#define elf_symbol(asymbol) ((elf_symbol_type *) (&(asymbol)->the_bfd))
98
99#ifndef S_GET_SIZE
100#define S_GET_SIZE(S) \
101  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size)
102#endif
103#ifndef S_SET_SIZE
104#define S_SET_SIZE(S,V) \
105  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_size = (V))
106#endif
107
108#ifndef S_GET_ALIGN
109#define S_GET_ALIGN(S) \
110  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value)
111#endif
112#ifndef S_SET_ALIGN
113#define S_SET_ALIGN(S,V) \
114  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_value = (V))
115#endif
116
117int elf_s_get_other (symbolS *);
118#ifndef S_GET_OTHER
119#define S_GET_OTHER(S)	(elf_s_get_other (S))
120#endif
121#ifndef S_SET_OTHER
122#define S_SET_OTHER(S,V) \
123  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
124#endif
125
126extern asection *gdb_section;
127
128#ifndef obj_frob_file
129#define obj_frob_file  elf_frob_file
130#endif
131extern void elf_frob_file (void);
132
133#ifndef obj_frob_file_before_adjust
134#define obj_frob_file_before_adjust  elf_frob_file_before_adjust
135#endif
136extern void elf_frob_file_before_adjust (void);
137
138#ifndef obj_frob_file_after_relocs
139#define obj_frob_file_after_relocs  elf_frob_file_after_relocs
140#endif
141extern void elf_frob_file_after_relocs (void);
142
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
148#endif
149
150#ifndef obj_app_file
151#define obj_app_file elf_file_symbol
152#endif
153extern void elf_file_symbol (const char *, int);
154
155extern void obj_elf_section_change_hook (void);
156
157extern void obj_elf_section (int);
158extern const char * obj_elf_section_name (void);
159extern void obj_elf_previous (int);
160extern void obj_elf_version (int);
161extern void obj_elf_common (int);
162extern void obj_elf_data (int);
163extern void obj_elf_text (int);
164extern void obj_elf_change_section
165  (const char *, unsigned int, bfd_vma, int, const char *, int, int);
166extern struct fix *obj_elf_vtable_inherit (int);
167extern struct fix *obj_elf_vtable_entry (int);
168extern bfd_boolean obj_elf_seen_attribute
169  (int, unsigned int);
170extern int obj_elf_vendor_attribute (int);
171
172/* BFD wants to write the udata field, which is a no-no for the
173   predefined section symbols in bfd/section.c.  They are read-only.  */
174#ifndef obj_sec_sym_ok_for_reloc
175#define obj_sec_sym_ok_for_reloc(SEC)	((SEC)->owner != 0)
176#endif
177
178void elf_obj_read_begin_hook (void);
179#ifndef obj_read_begin_hook
180#define obj_read_begin_hook	elf_obj_read_begin_hook
181#endif
182
183void elf_obj_symbol_new_hook (symbolS *);
184#ifndef obj_symbol_new_hook
185#define obj_symbol_new_hook	elf_obj_symbol_new_hook
186#endif
187
188void elf_copy_symbol_attributes (symbolS *, symbolS *);
189#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
190#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
191  (elf_copy_symbol_attributes (DEST, SRC))
192#endif
193
194void elf_adjust_symtab (void);
195#ifndef obj_adjust_symtab
196#define obj_adjust_symtab	elf_adjust_symtab
197#endif
198
199#ifndef SEPARATE_STAB_SECTIONS
200/* Avoid ifndef each separate macro setting by wrapping the whole of the
201   stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
202   caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
203   and OBJ_PROCESS_STAB too, without needing the tweaks below.  */
204
205/* Stabs go in a separate section.  */
206#define SEPARATE_STAB_SECTIONS 1
207
208/* We need 12 bytes at the start of the section to hold some initial
209   information.  */
210extern void obj_elf_init_stab_section (segT);
211#define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)
212
213#ifdef ECOFF_DEBUGGING
214/* We smuggle stabs in ECOFF rather than using a separate section.
215   The Irix linker can not handle a separate stabs section.  */
216
217#undef  SEPARATE_STAB_SECTIONS
218#define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)
219
220#undef  INIT_STAB_SECTION
221#define INIT_STAB_SECTION(seg) \
222  ((void) (ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))
223
224#undef OBJ_PROCESS_STAB
225#define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)		\
226  if (ECOFF_DEBUGGING)							\
227    ecoff_stab ((seg), (what), (string), (type), (other), (desc))
228#endif /* ECOFF_DEBUGGING */
229
230#endif /* SEPARATE_STAB_SECTIONS not defined.  */
231
232extern void elf_frob_symbol (symbolS *, int *);
233#ifndef obj_frob_symbol
234#define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
235#endif
236
237extern void elf_pop_insert (void);
238#ifndef obj_pop_insert
239#define obj_pop_insert()	elf_pop_insert()
240#endif
241
242#ifndef OBJ_MAYBE_ELF
243/* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext.  */
244#define obj_ecoff_set_ext elf_ecoff_set_ext
245struct ecoff_extr;
246extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *);
247#endif
248extern asection *elf_com_section_ptr;
249extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP,
250				   addressT size);
251
252#endif /* _OBJ_ELF_H */
253