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_HAVE_ARCH_PREL32_RELOCATIONS
8#define KSYM_ALIGN 4
9#elif defined(CONFIG_64BIT)
10#define KSYM_ALIGN 8
11#else
12#define KSYM_ALIGN 4
13#endif
14#ifndef KCRC_ALIGN
15#define KCRC_ALIGN 4
16#endif
17
18.macro __put, val, name
19#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
20 .long \val - ., \name - ., 0
21#elif defined(CONFIG_64BIT)
22 .quad \val, \name, 0
23#else
24 .long \val, \name, 0
25#endif
26.endm
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 __ksymtab_\name
35 .section ___ksymtab\sec+\name,"a"
36 .balign KSYM_ALIGN
37__ksymtab_\name:
38 __put \val, __kstrtab_\name
39 .previous
40 .section __ksymtab_strings,"a"
41__kstrtab_\name:
42 .asciz "\name"
43 .previous
44#ifdef CONFIG_MODVERSIONS
45 .section ___kcrctab\sec+\name,"a"
46 .balign KCRC_ALIGN
47__kcrctab_\name:
48#if defined(CONFIG_MODULE_REL_CRCS)
49 .long __crc_\name - .
50#else
51 .long __crc_\name
52#endif
53 .weak __crc_\name
54 .previous
55#endif
56#endif
57.endm
58
59#if defined(CONFIG_TRIM_UNUSED_KSYMS)
60
61#include <linux/kconfig.h>
62#include <generated/autoksyms.h>
63
64.macro __ksym_marker sym
65 .section ".discard.ksym","a"
66__ksym_marker_\sym:
67 .previous
68.endm
69
70#define __EXPORT_SYMBOL(sym, val, sec) \
71 __ksym_marker sym; \
72 __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
73#define __cond_export_sym(sym, val, sec, conf) \
74 ___cond_export_sym(sym, val, sec, conf)
75#define ___cond_export_sym(sym, val, sec, enabled) \
76 __cond_export_sym_##enabled(sym, val, sec)
77#define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
78#define __cond_export_sym_0(sym, val, sec) /* nothing */
79
80#else
81#define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
82#endif
83
84#define EXPORT_SYMBOL(name) \
85 __EXPORT_SYMBOL(name, KSYM_FUNC(name),)
86#define EXPORT_SYMBOL_GPL(name) \
87 __EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl)
88#define EXPORT_DATA_SYMBOL(name) \
89 __EXPORT_SYMBOL(name, name,)
90#define EXPORT_DATA_SYMBOL_GPL(name) \
91 __EXPORT_SYMBOL(name, name,_gpl)
92
93#endif