1 #ifndef _LINUX_LINKAGE_H
2 #define _LINUX_LINKAGE_H
3
4 #include <linux/compiler.h>
5 #include <asm/linkage.h>
6
7 #ifdef __cplusplus
8 #define CPP_ASMLINKAGE extern "C"
9 #else
10 #define CPP_ASMLINKAGE
11 #endif
12
13 #ifndef asmlinkage
14 #define asmlinkage CPP_ASMLINKAGE
15 #endif
16
17 #ifndef asmregparm
18 # define asmregparm
19 #endif
20
21 #define __page_aligned_data __section(.data.page_aligned) __aligned(PAGE_SIZE)
22 #define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE)
23
24 /*
25 * For assembly routines.
26 *
27 * Note when using these that you must specify the appropriate
28 * alignment directives yourself
29 */
30 #define __PAGE_ALIGNED_DATA .section ".data.page_aligned", "aw"
31 #define __PAGE_ALIGNED_BSS .section ".bss.page_aligned", "aw"
32
33 /*
34 * This is used by architectures to keep arguments on the stack
35 * untouched by the compiler by keeping them live until the end.
36 * The argument stack may be owned by the assembly-language
37 * caller, not the callee, and gcc doesn't always understand
38 * that.
39 *
40 * We have the return value, and a maximum of six arguments.
41 *
42 * This should always be followed by a "return ret" for the
43 * protection to work (ie no more work that the compiler might
44 * end up needing stack temporaries for).
45 */
46 /* Assembly files may be compiled with -traditional .. */
47 #ifndef __ASSEMBLY__
48 #ifndef asmlinkage_protect
49 # define asmlinkage_protect(n, ret, args...) do { } while (0)
50 #endif
51 #endif
52
53 #ifndef __ALIGN
54 #define __ALIGN .align 4,0x90
55 #define __ALIGN_STR ".align 4,0x90"
56 #endif
57
58 #ifdef __ASSEMBLY__
59
60 #define ALIGN __ALIGN
61 #define ALIGN_STR __ALIGN_STR
62
63 #ifndef ENTRY
64 #define ENTRY(name) \
65 .globl name; \
66 ALIGN; \
67 name:
68 #endif
69
70 #ifndef WEAK
71 #define WEAK(name) \
72 .weak name; \
73 name:
74 #endif
75
76 #ifndef END
77 #define END(name) \
78 .size name, .-name
79 #endif
80
81 /* If symbol 'name' is treated as a subroutine (gets called, and returns)
82 * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
83 * static analysis tools such as stack depth analyzer.
84 */
85 #ifndef ENDPROC
86 #define ENDPROC(name) \
87 .type name, @function; \
88 END(name)
89 #endif
90
91 #endif
92
93 #define NORET_TYPE /**/
94 #define ATTRIB_NORET __attribute__((noreturn))
95 #define NORET_AND noreturn,
96
97 #endif
98
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