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1da177e4 LT |
1 | #ifndef _LINUX_LINKAGE_H |
2 | #define _LINUX_LINKAGE_H | |
3 | ||
1da177e4 LT |
4 | #include <asm/linkage.h> |
5 | ||
6 | #ifdef __cplusplus | |
7 | #define CPP_ASMLINKAGE extern "C" | |
8 | #else | |
9 | #define CPP_ASMLINKAGE | |
10 | #endif | |
11 | ||
12 | #ifndef asmlinkage | |
13 | #define asmlinkage CPP_ASMLINKAGE | |
14 | #endif | |
15 | ||
d50efc6c IM |
16 | #ifndef asmregparm |
17 | # define asmregparm | |
18 | #endif | |
19 | ||
d10d89ec LT |
20 | /* |
21 | * This is used by architectures to keep arguments on the stack | |
22 | * untouched by the compiler by keeping them live until the end. | |
23 | * The argument stack may be owned by the assembly-language | |
24 | * caller, not the callee, and gcc doesn't always understand | |
25 | * that. | |
26 | * | |
27 | * We have the return value, and a maximum of six arguments. | |
28 | * | |
29 | * This should always be followed by a "return ret" for the | |
30 | * protection to work (ie no more work that the compiler might | |
31 | * end up needing stack temporaries for). | |
32 | */ | |
b0fac023 HC |
33 | /* Assembly files may be compiled with -traditional .. */ |
34 | #ifndef __ASSEMBLY__ | |
54a01510 RM |
35 | #ifndef asmlinkage_protect |
36 | # define asmlinkage_protect(n, ret, args...) do { } while (0) | |
1da177e4 | 37 | #endif |
b0fac023 | 38 | #endif |
1da177e4 LT |
39 | |
40 | #ifndef __ALIGN | |
41 | #define __ALIGN .align 4,0x90 | |
42 | #define __ALIGN_STR ".align 4,0x90" | |
43 | #endif | |
44 | ||
45 | #ifdef __ASSEMBLY__ | |
46 | ||
47 | #define ALIGN __ALIGN | |
48 | #define ALIGN_STR __ALIGN_STR | |
49 | ||
ab7efcc9 | 50 | #ifndef ENTRY |
1da177e4 LT |
51 | #define ENTRY(name) \ |
52 | .globl name; \ | |
53 | ALIGN; \ | |
54 | name: | |
ab7efcc9 | 55 | #endif |
1da177e4 | 56 | |
214541d1 RR |
57 | #ifndef WEAK |
58 | #define WEAK(name) \ | |
59 | .weak name; \ | |
60 | name: | |
61 | #endif | |
62 | ||
d0aaff97 | 63 | #define KPROBE_ENTRY(name) \ |
d28c4393 | 64 | .pushsection .kprobes.text, "ax"; \ |
ab7efcc9 | 65 | ENTRY(name) |
d0aaff97 | 66 | |
d28c4393 P |
67 | #define KPROBE_END(name) \ |
68 | END(name); \ | |
69 | .popsection | |
70 | ||
ab7efcc9 JB |
71 | #ifndef END |
72 | #define END(name) \ | |
73 | .size name, .-name | |
74 | #endif | |
75 | ||
6b8be6df JR |
76 | /* If symbol 'name' is treated as a subroutine (gets called, and returns) |
77 | * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of | |
78 | * static analysis tools such as stack depth analyzer. | |
79 | */ | |
ab7efcc9 JB |
80 | #ifndef ENDPROC |
81 | #define ENDPROC(name) \ | |
82 | .type name, @function; \ | |
83 | END(name) | |
84 | #endif | |
d0aaff97 | 85 | |
1da177e4 LT |
86 | #endif |
87 | ||
88 | #define NORET_TYPE /**/ | |
89 | #define ATTRIB_NORET __attribute__((noreturn)) | |
90 | #define NORET_AND noreturn, | |
91 | ||
1da177e4 | 92 | #endif |