1/* Mach-O object file format for gas, the assembler.
2   Copyright (C) 2009-2020 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
8   published by the Free Software Foundation; either version 3,
9   or (at your option) any later version.
10
11   GAS is distributed in the hope that it will be useful, but
12   WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
14   the 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#ifndef _OBJ_MACH_O_H
22#define _OBJ_MACH_O_H
23
24/* Tag to validate Mach-O object file format processing */
25#define OBJ_MACH_O 1
26
27#include "bfd/mach-o.h"
28
29#include "targ-cpu.h"
30
31#define OUTPUT_FLAVOR bfd_target_mach_o_flavour
32
33/* We want to control how the sections are pre-defined on startup.  */
34#define obj_begin() mach_o_begin ()
35extern void mach_o_begin (void);
36
37/* All our align expressions are power of two.  */
38#define USE_ALIGN_PTWO 1
39
40/* Common symbols can carry alignment information.  */
41#ifndef S_SET_ALIGN
42#define S_SET_ALIGN(S,V) do {\
43  bfd_mach_o_asymbol *___s = (bfd_mach_o_asymbol *) symbol_get_bfdsym (S);\
44  ___s->n_desc = (___s->n_desc & 0xf0ff) | (((V) & 0x0f) << 8);\
45} while (0)
46#endif
47
48extern const pseudo_typeS mach_o_pseudo_table[];
49
50#ifndef obj_pop_insert
51#define obj_pop_insert() pop_insert (mach_o_pseudo_table)
52#endif
53
54#define obj_sec_sym_ok_for_reloc(SEC)	1
55
56#define obj_read_begin_hook()	{;}
57#define obj_symbol_new_hook(s)	{;}
58
59#define EMIT_SECTION_SYMBOLS		0
60
61struct obj_mach_o_symbol_data
62{
63  /* If the symbol represents a subsection, this is the size of the subsection.
64     This is used to check whether a local symbol belongs to a subsection.  */
65  valueT subsection_size;
66};
67#define OBJ_SYMFIELD_TYPE struct obj_mach_o_symbol_data
68
69#define obj_frob_colon obj_mach_o_frob_colon
70extern void obj_mach_o_frob_colon (const char *);
71
72/* Called when a label is defined.  Mach-O uses this to create subsections.  */
73#define obj_frob_label obj_mach_o_frob_label
74extern void obj_mach_o_frob_label (symbolS *);
75
76#define obj_frob_symbol(s, punt) punt = obj_mach_o_frob_symbol(s)
77extern int obj_mach_o_frob_symbol (struct symbol *);
78
79#define OBJ_PROCESS_STAB(SEG,W,S,T,O,D)	obj_mach_o_process_stab(W,S,T,O,D)
80extern void obj_mach_o_process_stab (int, const char *,int, int, int);
81
82struct obj_mach_o_frag_data
83{
84  /* Symbol that corresponds to the subsection.  */
85  symbolS *subsection;
86};
87
88#define OBJ_FRAG_TYPE struct obj_mach_o_frag_data
89
90#define md_pre_output_hook obj_mach_o_pre_output_hook()
91extern void obj_mach_o_pre_output_hook(void);
92
93#define md_pre_relax_hook obj_mach_o_pre_relax_hook()
94extern void obj_mach_o_pre_relax_hook (void);
95
96#define md_post_relax_hook obj_mach_o_post_relax_hook()
97extern void obj_mach_o_post_relax_hook (void);
98
99#define obj_frob_file_after_relocs obj_mach_o_frob_file_after_relocs
100extern void obj_mach_o_frob_file_after_relocs (void);
101
102#define SET_SECTION_RELOCS(sec, relocs, n) \
103  obj_mach_o_reorder_section_relocs (sec, relocs, n)
104extern void obj_mach_o_reorder_section_relocs (asection *, arelent **,
105					       unsigned int);
106
107/* Emit relocs for local subtracts, to cater for subsections-via-symbols.  */
108#define md_allow_local_subtract(LEFT, RIGHT, SECTION) \
109 obj_mach_o_allow_local_subtract (LEFT, RIGHT, SECTION)
110extern int obj_mach_o_allow_local_subtract (expressionS *, expressionS *,
111					    segT);
112
113struct fix;
114extern int obj_mach_o_in_different_subsection (symbolS *a, symbolS *b);
115extern int obj_mach_o_force_reloc (struct fix *fix);
116extern int obj_mach_o_force_reloc_sub_same (struct fix *fix, segT seg);
117extern int obj_mach_o_force_reloc_sub_local (struct fix *fix, segT seg);
118
119#endif /* _OBJ_MACH_O_H */
120