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 62