| Harvey Harrison | 82f74e7 | 2008-01-30 13:31:07 +0100 | [diff] [blame] | 1 | #ifndef __ASM_LINKAGE_H |
| 2 | #define __ASM_LINKAGE_H |
| 3 | |
| 4 | #ifdef CONFIG_X86_64 |
| 5 | #define __ALIGN .p2align 4,,15 |
| 6 | #define __ALIGN_STR ".p2align 4,,15" |
| Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 7 | #endif |
| Harvey Harrison | 82f74e7 | 2008-01-30 13:31:07 +0100 | [diff] [blame] | 8 | |
| 9 | #ifdef CONFIG_X86_32 |
| 10 | #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) |
| Ingo Molnar | d50efc6 | 2008-01-30 13:33:00 +0100 | [diff] [blame] | 11 | /* |
| 12 | * For 32-bit UML - mark functions implemented in assembly that use |
| 13 | * regparm input parameters: |
| 14 | */ |
| 15 | #define asmregparm __attribute__((regparm(3))) |
| Roland McGrath | 54a0151 | 2008-04-10 15:37:38 -0700 | [diff] [blame] | 16 | |
| Linus Torvalds | d10d89e | 2008-04-10 17:35:23 -0700 | [diff] [blame^] | 17 | /* |
| 18 | * Make sure the compiler doesn't do anything stupid with the |
| 19 | * arguments on the stack - they are owned by the *caller*, not |
| 20 | * the callee. This just fools gcc into not spilling into them, |
| 21 | * and keeps it from doing tailcall recursion and/or using the |
| 22 | * stack slots for temporaries, since they are live and "used" |
| 23 | * all the way to the end of the function. |
| 24 | * |
| 25 | * NOTE! On x86-64, all the arguments are in registers, so this |
| 26 | * only matters on a 32-bit kernel. |
| 27 | */ |
| Roland McGrath | 54a0151 | 2008-04-10 15:37:38 -0700 | [diff] [blame] | 28 | #define asmlinkage_protect(n, ret, args...) \ |
| 29 | __asmlinkage_protect##n(ret, ##args) |
| 30 | #define __asmlinkage_protect_n(ret, args...) \ |
| 31 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) |
| 32 | #define __asmlinkage_protect0(ret) \ |
| 33 | __asmlinkage_protect_n(ret) |
| 34 | #define __asmlinkage_protect1(ret, arg1) \ |
| 35 | __asmlinkage_protect_n(ret, "g" (arg1)) |
| 36 | #define __asmlinkage_protect2(ret, arg1, arg2) \ |
| 37 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2)) |
| 38 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ |
| 39 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3)) |
| 40 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ |
| 41 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
| 42 | "g" (arg4)) |
| 43 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ |
| 44 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
| 45 | "g" (arg4), "g" (arg5)) |
| 46 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ |
| 47 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ |
| 48 | "g" (arg4), "g" (arg5), "g" (arg6)) |
| 49 | |
| Harvey Harrison | 82f74e7 | 2008-01-30 13:31:07 +0100 | [diff] [blame] | 50 | #endif |
| 51 | |
| 52 | #ifdef CONFIG_X86_ALIGNMENT_16 |
| 53 | #define __ALIGN .align 16,0x90 |
| 54 | #define __ALIGN_STR ".align 16,0x90" |
| 55 | #endif |
| 56 | |
| 57 | #endif |
| 58 | |