Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef PERF_LINUX_LINKAGE_H_
4#define PERF_LINUX_LINKAGE_H_
5
6/* linkage.h ... for including arch/x86/lib/memcpy_64.S */
7
8/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
9#ifndef ASM_NL
10#define ASM_NL ;
11#endif
12
13#ifndef __ALIGN
14#define __ALIGN .align 4,0x90
15#define __ALIGN_STR ".align 4,0x90"
16#endif
17
18/* SYM_T_FUNC -- type used by assembler to mark functions */
19#ifndef SYM_T_FUNC
20#define SYM_T_FUNC STT_FUNC
21#endif
22
23/* SYM_A_* -- align the symbol? */
24#define SYM_A_ALIGN ALIGN
25
26/* SYM_L_* -- linkage of symbols */
27#define SYM_L_GLOBAL(name) .globl name
28#define SYM_L_LOCAL(name) /* nothing */
29
30#define ALIGN __ALIGN
31
32/* === generic annotations === */
33
34/* SYM_ENTRY -- use only if you have to for non-paired symbols */
35#ifndef SYM_ENTRY
36#define SYM_ENTRY(name, linkage, align...) \
37 linkage(name) ASM_NL \
38 align ASM_NL \
39 name:
40#endif
41
42/* SYM_START -- use only if you have to */
43#ifndef SYM_START
44#define SYM_START(name, linkage, align...) \
45 SYM_ENTRY(name, linkage, align)
46#endif
47
48/* SYM_END -- use only if you have to */
49#ifndef SYM_END
50#define SYM_END(name, sym_type) \
51 .type name sym_type ASM_NL \
52 .size name, .-name
53#endif
54
55/*
56 * SYM_FUNC_START_ALIAS -- use where there are two global names for one
57 * function
58 */
59#ifndef SYM_FUNC_START_ALIAS
60#define SYM_FUNC_START_ALIAS(name) \
61 SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
62#endif
63
64/* SYM_FUNC_START -- use for global functions */
65#ifndef SYM_FUNC_START
66/*
67 * The same as SYM_FUNC_START_ALIAS, but we will need to distinguish these two
68 * later.
69 */
70#define SYM_FUNC_START(name) \
71 SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
72#endif
73
74/* SYM_FUNC_START_LOCAL -- use for local functions */
75#ifndef SYM_FUNC_START_LOCAL
76/* the same as SYM_FUNC_START_LOCAL_ALIAS, see comment near SYM_FUNC_START */
77#define SYM_FUNC_START_LOCAL(name) \
78 SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
79#endif
80
81/* SYM_FUNC_END_ALIAS -- the end of LOCAL_ALIASed or ALIASed function */
82#ifndef SYM_FUNC_END_ALIAS
83#define SYM_FUNC_END_ALIAS(name) \
84 SYM_END(name, SYM_T_FUNC)
85#endif
86
87/*
88 * SYM_FUNC_END -- the end of SYM_FUNC_START_LOCAL, SYM_FUNC_START,
89 * SYM_FUNC_START_WEAK, ...
90 */
91#ifndef SYM_FUNC_END
92/* the same as SYM_FUNC_END_ALIAS, see comment near SYM_FUNC_START */
93#define SYM_FUNC_END(name) \
94 SYM_END(name, SYM_T_FUNC)
95#endif
96
97#endif /* PERF_LINUX_LINKAGE_H_ */