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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __ASM_LINKAGE_H |
3 | #define __ASM_LINKAGE_H | |
4 | ||
5 | #define __ALIGN .align 4 | |
6 | #define __ALIGN_STR ".align 4" | |
7 | ||
8474ba74 AS |
8 | /* |
9 | * Make sure the compiler doesn't do anything stupid with the | |
10 | * arguments on the stack - they are owned by the *caller*, not | |
11 | * the callee. This just fools gcc into not spilling into them, | |
12 | * and keeps it from doing tailcall recursion and/or using the | |
13 | * stack slots for temporaries, since they are live and "used" | |
14 | * all the way to the end of the function. | |
15 | */ | |
16 | #define asmlinkage_protect(n, ret, args...) \ | |
17 | __asmlinkage_protect##n(ret, ##args) | |
18 | #define __asmlinkage_protect_n(ret, args...) \ | |
19 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) | |
20 | #define __asmlinkage_protect0(ret) \ | |
21 | __asmlinkage_protect_n(ret) | |
22 | #define __asmlinkage_protect1(ret, arg1) \ | |
23 | __asmlinkage_protect_n(ret, "m" (arg1)) | |
24 | #define __asmlinkage_protect2(ret, arg1, arg2) \ | |
25 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2)) | |
26 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ | |
27 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3)) | |
28 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ | |
29 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ | |
30 | "m" (arg4)) | |
31 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ | |
32 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ | |
33 | "m" (arg4), "m" (arg5)) | |
34 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ | |
35 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ | |
36 | "m" (arg4), "m" (arg5), "m" (arg6)) | |
37 | ||
1da177e4 | 38 | #endif |