1/* Assembler macros for x86.
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef _X86_SYSDEP_H
20#define _X86_SYSDEP_H 1
21
22#include <sysdeps/generic/sysdep.h>
23
24#ifdef __ASSEMBLER__
25
26/* Syntactic details of assembler. */
27
28/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
29#define ALIGNARG(log2) 1<<log2
30#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
31
32/* Define an entry point visible from C. */
33#define ENTRY(name) \
34 .globl C_SYMBOL_NAME(name); \
35 .type C_SYMBOL_NAME(name),@function; \
36 .align ALIGNARG(4); \
37 C_LABEL(name) \
38 cfi_startproc; \
39 CALL_MCOUNT
40
41#undef END
42#define END(name) \
43 cfi_endproc; \
44 ASM_SIZE_DIRECTIVE(name)
45
46#define ENTRY_CHK(name) ENTRY (name)
47#define END_CHK(name) END (name)
48
49/* Since C identifiers are not normally prefixed with an underscore
50 on this system, the asm identifier `syscall_error' intrudes on the
51 C name space. Make sure we use an innocuous name. */
52#define syscall_error __syscall_error
53#define mcount _mcount
54
55#undef PSEUDO_END
56#define PSEUDO_END(name) \
57 END (name)
58
59/* Local label name for asm code. */
60#ifndef L
61/* ELF-like local names start with `.L'. */
62# define L(name) .L##name
63#endif
64
65#define atom_text_section .section ".text.atom", "ax"
66
67#endif /* __ASSEMBLER__ */
68
69#endif /* _X86_SYSDEP_H */
70