Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_GENERIC_EXPORT_H
2#define __ASM_GENERIC_EXPORT_H
3
4#ifndef KSYM_FUNC
5#define KSYM_FUNC(x) x
6#endif
7#ifdef CONFIG_64BIT
8#define __put .quad
9#ifndef KSYM_ALIGN
10#define KSYM_ALIGN 8
11#endif
12#ifndef KCRC_ALIGN
13#define KCRC_ALIGN 8
14#endif
15#else
16#define __put .long
17#ifndef KSYM_ALIGN
18#define KSYM_ALIGN 4
19#endif
20#ifndef KCRC_ALIGN
21#define KCRC_ALIGN 4
22#endif
23#endif
24
25#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
26#define KSYM(name) _##name
27#else
28#define KSYM(name) name
29#endif
30
31/*
32 * note on .section use: @progbits vs %progbits nastiness doesn't matter,
33 * since we immediately emit into those sections anyway.
34 */
35.macro ___EXPORT_SYMBOL name,val,sec
36#ifdef CONFIG_MODULES
37 .globl KSYM(__ksymtab_\name)
38 .section ___ksymtab\sec+\name,"a"
39 .balign KSYM_ALIGN
40KSYM(__ksymtab_\name):
41 __put \val, KSYM(__kstrtab_\name)
42 .previous
43 .section __ksymtab_strings,"a"
44KSYM(__kstrtab_\name):
45#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
46 .asciz "_\name"
47#else
48 .asciz "\name"
49#endif
50 .previous
51#ifdef CONFIG_MODVERSIONS
52 .section ___kcrctab\sec+\name,"a"
53 .balign KCRC_ALIGN
54KSYM(__kcrctab_\name):
55 __put KSYM(__crc_\name)
56 .weak KSYM(__crc_\name)
57 .previous
58#endif
59#endif
60.endm
61#undef __put
62
63#if defined(__KSYM_DEPS__)
64
65#define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym ===
66
67#elif defined(CONFIG_TRIM_UNUSED_KSYMS)
68
69#include <linux/kconfig.h>
70#include <generated/autoksyms.h>
71
72#define __EXPORT_SYMBOL(sym, val, sec) \
73 __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
74#define __cond_export_sym(sym, val, sec, conf) \
75 ___cond_export_sym(sym, val, sec, conf)
76#define ___cond_export_sym(sym, val, sec, enabled) \
77 __cond_export_sym_##enabled(sym, val, sec)
78#define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
79#define __cond_export_sym_0(sym, val, sec) /* nothing */
80
81#else
82#define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
83#endif
84
85#define EXPORT_SYMBOL(name) \
86 __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)),)
87#define EXPORT_SYMBOL_GPL(name) \
88 __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)), _gpl)
89#define EXPORT_DATA_SYMBOL(name) \
90 __EXPORT_SYMBOL(name, KSYM(name),)
91#define EXPORT_DATA_SYMBOL_GPL(name) \
92 __EXPORT_SYMBOL(name, KSYM(name),_gpl)
93
94#endif