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