98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
|
/* 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 */
|
||
|
|
|