| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_LINKAGE_H |
| 2 | #define __ASM_LINKAGE_H |
| 3 | |
| 4 | #define __ALIGN .align 4 |
| 5 | #define __ALIGN_STR ".align 4" |
| 6 | |
| Andreas Schwab | 8474ba7 | 2015-09-23 23:12:09 +0200 | [diff] [blame] | 7 | /* |
| 8 | * Make sure the compiler doesn't do anything stupid with the |
| 9 | * arguments on the stack - they are owned by the *caller*, not |
| 10 | * the callee. This just fools gcc into not spilling into them, |
| 11 | * and keeps it from doing tailcall recursion and/or using the |
| 12 | * stack slots for temporaries, since they are live and "used" |
| 13 | * all the way to the end of the function. |
| 14 | */ |
| 15 | #define asmlinkage_protect(n, ret, args...) \ |
| 16 | __asmlinkage_protect##n(ret, ##args) |
| 17 | #define __asmlinkage_protect_n(ret, args...) \ |
| 18 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) |
| 19 | #define __asmlinkage_protect0(ret) \ |
| 20 | __asmlinkage_protect_n(ret) |
| 21 | #define __asmlinkage_protect1(ret, arg1) \ |
| 22 | __asmlinkage_protect_n(ret, "m" (arg1)) |
| 23 | #define __asmlinkage_protect2(ret, arg1, arg2) \ |
| 24 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2)) |
| 25 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ |
| 26 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3)) |
| 27 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ |
| 28 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
| 29 | "m" (arg4)) |
| 30 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ |
| 31 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
| 32 | "m" (arg4), "m" (arg5)) |
| 33 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ |
| 34 | __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ |
| 35 | "m" (arg4), "m" (arg5), "m" (arg6)) |
| 36 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #endif |