1
2#ifndef _LINUX_LINKAGE_H
3#define _LINUX_LINKAGE_H
4
5#include <linux/compiler_types.h>
6#include <linux/stringify.h>
7#include <linux/export.h>
8#include <asm/linkage.h>
9
10
11#ifndef ASM_NL
12#define ASM_NL ;
13#endif
14
15#ifdef __cplusplus
16#define CPP_ASMLINKAGE extern "C"
17#else
18#define CPP_ASMLINKAGE
19#endif
20
21#ifndef asmlinkage
22#define asmlinkage CPP_ASMLINKAGE
23#endif
24
25#ifndef cond_syscall
26#define cond_syscall(x) asm( \
27 ".weak " __stringify(x) "\n\t" \
28 ".set " __stringify(x) "," \
29 __stringify(sys_ni_syscall))
30#endif
31
32#ifndef SYSCALL_ALIAS
33#define SYSCALL_ALIAS(alias, name) asm( \
34 ".globl " __stringify(alias) "\n\t" \
35 ".set " __stringify(alias) "," \
36 __stringify(name))
37#endif
38
39#define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE)
40#define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE)
41
42
43
44
45
46
47
48#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
49#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
50
51
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62
63
64
65#ifndef __ASSEMBLY__
66#ifndef asmlinkage_protect
67# define asmlinkage_protect(n, ret, args...) do { } while (0)
68#endif
69#endif
70
71#ifndef __ALIGN
72#define __ALIGN .align 4,0x90
73#define __ALIGN_STR ".align 4,0x90"
74#endif
75
76#ifdef __ASSEMBLY__
77
78#ifndef LINKER_SCRIPT
79#define ALIGN __ALIGN
80#define ALIGN_STR __ALIGN_STR
81
82#ifndef GLOBAL
83#define GLOBAL(name) \
84 .globl name ASM_NL \
85 name:
86#endif
87
88#ifndef ENTRY
89#define ENTRY(name) \
90 .globl name ASM_NL \
91 ALIGN ASM_NL \
92 name:
93#endif
94#endif
95
96#ifndef WEAK
97#define WEAK(name) \
98 .weak name ASM_NL \
99 ALIGN ASM_NL \
100 name:
101#endif
102
103#ifndef END
104#define END(name) \
105 .size name, .-name
106#endif
107
108
109
110
111
112#ifndef ENDPROC
113#define ENDPROC(name) \
114 .type name, @function ASM_NL \
115 END(name)
116#endif
117
118#endif
119
120#endif
121