1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _ASM_X86_LINKAGE_H 3*4882a593Smuzhiyun #define _ASM_X86_LINKAGE_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/stringify.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #undef notrace 8*4882a593Smuzhiyun #define notrace __attribute__((no_instrument_function)) 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifdef CONFIG_X86_32 11*4882a593Smuzhiyun #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) 12*4882a593Smuzhiyun #endif /* CONFIG_X86_32 */ 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #ifdef __ASSEMBLY__ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16) 17*4882a593Smuzhiyun #define __ALIGN .p2align 4, 0x90 18*4882a593Smuzhiyun #define __ALIGN_STR __stringify(__ALIGN) 19*4882a593Smuzhiyun #endif 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #if defined(CONFIG_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO) 22*4882a593Smuzhiyun #define RET jmp __x86_return_thunk 23*4882a593Smuzhiyun #else /* CONFIG_RETPOLINE */ 24*4882a593Smuzhiyun #ifdef CONFIG_SLS 25*4882a593Smuzhiyun #define RET ret; int3 26*4882a593Smuzhiyun #else 27*4882a593Smuzhiyun #define RET ret 28*4882a593Smuzhiyun #endif 29*4882a593Smuzhiyun #endif /* CONFIG_RETPOLINE */ 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #else /* __ASSEMBLY__ */ 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #if defined(CONFIG_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO) 34*4882a593Smuzhiyun #define ASM_RET "jmp __x86_return_thunk\n\t" 35*4882a593Smuzhiyun #else /* CONFIG_RETPOLINE */ 36*4882a593Smuzhiyun #ifdef CONFIG_SLS 37*4882a593Smuzhiyun #define ASM_RET "ret; int3\n\t" 38*4882a593Smuzhiyun #else 39*4882a593Smuzhiyun #define ASM_RET "ret\n\t" 40*4882a593Smuzhiyun #endif 41*4882a593Smuzhiyun #endif /* CONFIG_RETPOLINE */ 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #endif /* _ASM_X86_LINKAGE_H */ 46*4882a593Smuzhiyun 47