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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _ASM_X86_LINKAGE_H
- #define _ASM_X86_LINKAGE_H
- #include <linux/stringify.h>
- #include <asm/ibt.h>
- #undef notrace
- #define notrace __attribute__((no_instrument_function))
- #ifdef CONFIG_64BIT
- /*
- * The generic version tends to create spurious ENDBR instructions under
- * certain conditions.
- */
- #define _THIS_IP_ ({ unsigned long __here; asm ("lea 0(%%rip), %0" : "=r" (__here)); __here; })
- #endif
- #ifdef CONFIG_X86_32
- #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
- #endif /* CONFIG_X86_32 */
- #ifdef __ASSEMBLY__
- #if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16)
- #define __ALIGN .p2align 4, 0x90
- #define __ALIGN_STR __stringify(__ALIGN)
- #endif
- #if defined(CONFIG_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO)
- #define RET jmp __x86_return_thunk
- #else /* CONFIG_RETPOLINE */
- #ifdef CONFIG_SLS
- #define RET ret; int3
- #else
- #define RET ret
- #endif
- #endif /* CONFIG_RETPOLINE */
- #else /* __ASSEMBLY__ */
- #if defined(CONFIG_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO)
- #define ASM_RET "jmp __x86_return_thunk\n\t"
- #else /* CONFIG_RETPOLINE */
- #ifdef CONFIG_SLS
- #define ASM_RET "ret; int3\n\t"
- #else
- #define ASM_RET "ret\n\t"
- #endif
- #endif /* CONFIG_RETPOLINE */
- #endif /* __ASSEMBLY__ */
- #define __CFI_TYPE(name) \
- SYM_START(__cfi_##name, SYM_L_LOCAL, SYM_A_NONE) \
- .fill 11, 1, 0x90 ASM_NL \
- .byte 0xb8 ASM_NL \
- .long __kcfi_typeid_##name ASM_NL \
- SYM_FUNC_END(__cfi_##name)
- /* SYM_TYPED_FUNC_START -- use for indirectly called globals, w/ CFI type */
- #define SYM_TYPED_FUNC_START(name) \
- SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \
- ENDBR
- /* SYM_FUNC_START -- use for global functions */
- #define SYM_FUNC_START(name) \
- SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \
- ENDBR
- /* SYM_FUNC_START_NOALIGN -- use for global functions, w/o alignment */
- #define SYM_FUNC_START_NOALIGN(name) \
- SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) \
- ENDBR
- /* SYM_FUNC_START_LOCAL -- use for local functions */
- #define SYM_FUNC_START_LOCAL(name) \
- SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN) \
- ENDBR
- /* SYM_FUNC_START_LOCAL_NOALIGN -- use for local functions, w/o alignment */
- #define SYM_FUNC_START_LOCAL_NOALIGN(name) \
- SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) \
- ENDBR
- /* SYM_FUNC_START_WEAK -- use for weak functions */
- #define SYM_FUNC_START_WEAK(name) \
- SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN) \
- ENDBR
- /* SYM_FUNC_START_WEAK_NOALIGN -- use for weak functions, w/o alignment */
- #define SYM_FUNC_START_WEAK_NOALIGN(name) \
- SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \
- ENDBR
- #endif /* _ASM_X86_LINKAGE_H */
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