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