Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_LINKAGE_H |
2 | #define _LINUX_LINKAGE_H | |
3 | ||
a7bf0bd5 | 4 | #include <linux/compiler.h> |
1da177e4 LT |
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 | ||
75b13483 | 17 | #define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE) |
7c74df07 | 18 | #define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE) |
a7bf0bd5 | 19 | |
d2af12ae TA |
20 | /* |
21 | * For assembly routines. | |
22 | * | |
23 | * Note when using these that you must specify the appropriate | |
24 | * alignment directives yourself | |
25 | */ | |
75b13483 | 26 | #define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw" |
7c74df07 | 27 | #define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw" |
d2af12ae | 28 | |
d10d89ec LT |
29 | /* |
30 | * This is used by architectures to keep arguments on the stack | |
31 | * untouched by the compiler by keeping them live until the end. | |
32 | * The argument stack may be owned by the assembly-language | |
33 | * caller, not the callee, and gcc doesn't always understand | |
34 | * that. | |
35 | * | |
36 | * We have the return value, and a maximum of six arguments. | |
37 | * | |
38 | * This should always be followed by a "return ret" for the | |
39 | * protection to work (ie no more work that the compiler might | |
40 | * end up needing stack temporaries for). | |
41 | */ | |
b0fac023 HC |
42 | /* Assembly files may be compiled with -traditional .. */ |
43 | #ifndef __ASSEMBLY__ | |
54a01510 RM |
44 | #ifndef asmlinkage_protect |
45 | # define asmlinkage_protect(n, ret, args...) do { } while (0) | |
1da177e4 | 46 | #endif |
b0fac023 | 47 | #endif |
1da177e4 LT |
48 | |
49 | #ifndef __ALIGN | |
50 | #define __ALIGN .align 4,0x90 | |
51 | #define __ALIGN_STR ".align 4,0x90" | |
52 | #endif | |
53 | ||
54 | #ifdef __ASSEMBLY__ | |
55 | ||
42f29a25 | 56 | #ifndef LINKER_SCRIPT |
1da177e4 LT |
57 | #define ALIGN __ALIGN |
58 | #define ALIGN_STR __ALIGN_STR | |
59 | ||
ab7efcc9 | 60 | #ifndef ENTRY |
1da177e4 LT |
61 | #define ENTRY(name) \ |
62 | .globl name; \ | |
63 | ALIGN; \ | |
64 | name: | |
ab7efcc9 | 65 | #endif |
42f29a25 | 66 | #endif /* LINKER_SCRIPT */ |
1da177e4 | 67 | |
214541d1 RR |
68 | #ifndef WEAK |
69 | #define WEAK(name) \ | |
70 | .weak name; \ | |
71 | name: | |
72 | #endif | |
73 | ||
ab7efcc9 JB |
74 | #ifndef END |
75 | #define END(name) \ | |
76 | .size name, .-name | |
77 | #endif | |
78 | ||
6b8be6df JR |
79 | /* If symbol 'name' is treated as a subroutine (gets called, and returns) |
80 | * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of | |
81 | * static analysis tools such as stack depth analyzer. | |
82 | */ | |
ab7efcc9 JB |
83 | #ifndef ENDPROC |
84 | #define ENDPROC(name) \ | |
85 | .type name, @function; \ | |
86 | END(name) | |
87 | #endif | |
d0aaff97 | 88 | |
1da177e4 LT |
89 | #endif |
90 | ||
91 | #define NORET_TYPE /**/ | |
92 | #define ATTRIB_NORET __attribute__((noreturn)) | |
93 | #define NORET_AND noreturn, | |
94 | ||
1da177e4 | 95 | #endif |