diff options
Diffstat (limited to 'arch/x86/include/asm/linkage.h')
-rw-r--r-- | arch/x86/include/asm/linkage.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/x86/include/asm/linkage.h b/arch/x86/include/asm/linkage.h new file mode 100644 index 000000000000..f61ee8f937e4 --- /dev/null +++ b/arch/x86/include/asm/linkage.h | |||
@@ -0,0 +1,61 @@ | |||
1 | #ifndef _ASM_X86_LINKAGE_H | ||
2 | #define _ASM_X86_LINKAGE_H | ||
3 | |||
4 | #undef notrace | ||
5 | #define notrace __attribute__((no_instrument_function)) | ||
6 | |||
7 | #ifdef CONFIG_X86_64 | ||
8 | #define __ALIGN .p2align 4,,15 | ||
9 | #define __ALIGN_STR ".p2align 4,,15" | ||
10 | #endif | ||
11 | |||
12 | #ifdef CONFIG_X86_32 | ||
13 | #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) | ||
14 | /* | ||
15 | * For 32-bit UML - mark functions implemented in assembly that use | ||
16 | * regparm input parameters: | ||
17 | */ | ||
18 | #define asmregparm __attribute__((regparm(3))) | ||
19 | |||
20 | /* | ||
21 | * Make sure the compiler doesn't do anything stupid with the | ||
22 | * arguments on the stack - they are owned by the *caller*, not | ||
23 | * the callee. This just fools gcc into not spilling into them, | ||
24 | * and keeps it from doing tailcall recursion and/or using the | ||
25 | * stack slots for temporaries, since they are live and "used" | ||
26 | * all the way to the end of the function. | ||
27 | * | ||
28 | * NOTE! On x86-64, all the arguments are in registers, so this | ||
29 | * only matters on a 32-bit kernel. | ||
30 | */ | ||
31 | #define asmlinkage_protect(n, ret, args...) \ | ||
32 | __asmlinkage_protect##n(ret, ##args) | ||
33 | #define __asmlinkage_protect_n(ret, args...) \ | ||
34 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) | ||
35 | #define __asmlinkage_protect0(ret) \ | ||
36 | __asmlinkage_protect_n(ret) | ||
37 | #define __asmlinkage_protect1(ret, arg1) \ | ||
38 | __asmlinkage_protect_n(ret, "g" (arg1)) | ||
39 | #define __asmlinkage_protect2(ret, arg1, arg2) \ | ||
40 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2)) | ||
41 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ | ||
42 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3)) | ||
43 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ | ||
44 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | ||
45 | "g" (arg4)) | ||
46 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ | ||
47 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | ||
48 | "g" (arg4), "g" (arg5)) | ||
49 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ | ||
50 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | ||
51 | "g" (arg4), "g" (arg5), "g" (arg6)) | ||
52 | |||
53 | #endif | ||
54 | |||
55 | #ifdef CONFIG_X86_ALIGNMENT_16 | ||
56 | #define __ALIGN .align 16,0x90 | ||
57 | #define __ALIGN_STR ".align 16,0x90" | ||
58 | #endif | ||
59 | |||
60 | #endif /* _ASM_X86_LINKAGE_H */ | ||
61 | |||