1 #ifndef _ASM_X86_LINKAGE_H 2 #define _ASM_X86_LINKAGE_H 3 4 #include <linux/stringify.h> 5 6 #undef notrace 7 #define notrace __attribute__((no_instrument_function)) 8 9 #ifdef CONFIG_X86_32 10 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) 11 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 */ 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) \ 30 __asmlinkage_protect_n(ret, "m" (arg1)) 31 #define __asmlinkage_protect2(ret, arg1, arg2) \ 32 __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2)) 33 #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ 34 __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3)) 35 #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ 36 __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ 37 "m" (arg4)) 38 #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ 39 __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ 40 "m" (arg4), "m" (arg5)) 41 #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ 42 __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \ 43 "m" (arg4), "m" (arg5), "m" (arg6)) 44 45 #endif /* CONFIG_X86_32 */ 46 47 #ifdef __ASSEMBLY__ 48 49 #define GLOBAL(name) \ 50 .globl name; \ 51 name: 52 53 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16) 54 #define __ALIGN .p2align 4, 0x90 55 #define __ALIGN_STR __stringify(__ALIGN) 56 #endif 57 58 #endif /* __ASSEMBLY__ */ 59 60 #endif /* _ASM_X86_LINKAGE_H */ 61 62