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1965aae3 PA |
1 | #ifndef _ASM_X86_LINKAGE_H |
2 | #define _ASM_X86_LINKAGE_H | |
82f74e71 | 3 | |
bb7f5f6c CG |
4 | #include <linux/stringify.h> |
5 | ||
78a9909a IM |
6 | #undef notrace |
7 | #define notrace __attribute__((no_instrument_function)) | |
8 | ||
96a388de | 9 | #ifdef CONFIG_X86_32 |
82f74e71 | 10 | #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) |
54a01510 | 11 | |
d10d89ec LT |
12 | /* |
13 | * Make sure the compiler doesn't do anything stupid with the | |
14 | * arguments on the stack - they are owned by the *caller*, not | |
15 | * the callee. This just fools gcc into not spilling into them, | |
16 | * and keeps it from doing tailcall recursion and/or using the | |
17 | * stack slots for temporaries, since they are live and "used" | |
18 | * all the way to the end of the function. | |
19 | * | |
20 | * NOTE! On x86-64, all the arguments are in registers, so this | |
21 | * only matters on a 32-bit kernel. | |
22 | */ | |
54a01510 RM |
23 | #define asmlinkage_protect(n, ret, args...) \ |
24 | __asmlinkage_protect##n(ret, ##args) | |
25 | #define __asmlinkage_protect_n(ret, args...) \ | |
26 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) | |
27 | #define __asmlinkage_protect0(ret) \ | |
28 | __asmlinkage_protect_n(ret) | |
29 | #define __asmlinkage_protect1(ret, arg1) \ | |
d59fe3f1 | 30 | __asmlinkage_protect_n(ret, "m" (arg1)) |
54a01510 | 31 | #define __asmlinkage_protect2(ret, arg1, arg2) \ |
d59fe3f1 | 32 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2)) |
54a01510 | 33 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ |
d59fe3f1 | 34 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3)) |
54a01510 | 35 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ |
d59fe3f1 JB |
36 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
37 | "m" (arg4)) | |
54a01510 | 38 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ |
d59fe3f1 JB |
39 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
40 | "m" (arg4), "m" (arg5)) | |
54a01510 | 41 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ |
d59fe3f1 JB |
42 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
43 | "m" (arg4), "m" (arg5), "m" (arg6)) | |
54a01510 | 44 | |
7ab15247 CG |
45 | #endif /* CONFIG_X86_32 */ |
46 | ||
47 | #ifdef __ASSEMBLY__ | |
82f74e71 | 48 | |
95695547 CG |
49 | #define GLOBAL(name) \ |
50 | .globl name; \ | |
51 | name: | |
52 | ||
bb7f5f6c CG |
53 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16) |
54 | #define __ALIGN .p2align 4, 0x90 | |
55 | #define __ALIGN_STR __stringify(__ALIGN) | |
82f74e71 HH |
56 | #endif |
57 | ||
7ab15247 CG |
58 | #endif /* __ASSEMBLY__ */ |
59 | ||
1965aae3 | 60 | #endif /* _ASM_X86_LINKAGE_H */ |
82f74e71 | 61 |