1#ifndef _LINUX_EXPORT_H
2#define _LINUX_EXPORT_H
3
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11
12
13#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
14#define __VMLINUX_SYMBOL(x) _##x
15#define __VMLINUX_SYMBOL_STR(x) "_" #x
16#else
17#define __VMLINUX_SYMBOL(x) x
18#define __VMLINUX_SYMBOL_STR(x) #x
19#endif
20
21
22#define VMLINUX_SYMBOL(x) __VMLINUX_SYMBOL(x)
23#define VMLINUX_SYMBOL_STR(x) __VMLINUX_SYMBOL_STR(x)
24
25#ifndef __ASSEMBLY__
26struct kernel_symbol
27{
28 unsigned long value;
29 const char *name;
30};
31
32#ifdef MODULE
33extern struct module __this_module;
34#define THIS_MODULE (&__this_module)
35#else
36#define THIS_MODULE ((struct module *)0)
37#endif
38
39#ifdef CONFIG_MODULES
40
41#ifndef __GENKSYMS__
42#ifdef CONFIG_MODVERSIONS
43
44
45#define __CRC_SYMBOL(sym, sec) \
46 extern __visible void *__crc_##sym __attribute__((weak)); \
47 static const unsigned long __kcrctab_##sym \
48 __used \
49 __attribute__((section("___kcrctab" sec "+" #sym), unused)) \
50 = (unsigned long) &__crc_##sym;
51#else
52#define __CRC_SYMBOL(sym, sec)
53#endif
54
55
56#define __EXPORT_SYMBOL(sym, sec) \
57 extern typeof(sym) sym; \
58 __CRC_SYMBOL(sym, sec) \
59 static const char __kstrtab_##sym[] \
60 __attribute__((section("__ksymtab_strings"), aligned(1))) \
61 = VMLINUX_SYMBOL_STR(sym); \
62 extern const struct kernel_symbol __ksymtab_##sym; \
63 __visible const struct kernel_symbol __ksymtab_##sym \
64 __used \
65 __attribute__((section("___ksymtab" sec "+" #sym), unused)) \
66 = { (unsigned long)&sym, __kstrtab_##sym }
67
68#define EXPORT_SYMBOL(sym) \
69 __EXPORT_SYMBOL(sym, "")
70
71#define EXPORT_SYMBOL_GPL(sym) \
72 __EXPORT_SYMBOL(sym, "_gpl")
73
74#define EXPORT_SYMBOL_GPL_FUTURE(sym) \
75 __EXPORT_SYMBOL(sym, "_gpl_future")
76
77#ifdef CONFIG_UNUSED_SYMBOLS
78#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
79#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
80#else
81#define EXPORT_UNUSED_SYMBOL(sym)
82#define EXPORT_UNUSED_SYMBOL_GPL(sym)
83#endif
84
85#endif
86
87#else
88
89#define EXPORT_SYMBOL(sym)
90#define EXPORT_SYMBOL_GPL(sym)
91#define EXPORT_SYMBOL_GPL_FUTURE(sym)
92#define EXPORT_UNUSED_SYMBOL(sym)
93#define EXPORT_UNUSED_SYMBOL_GPL(sym)
94
95#endif
96#endif
97
98#endif
99