mirror of https://gitee.com/openkylin/linux.git
49 lines
1.2 KiB
ArmAsm
49 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#include <linux/stringify.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/dwarf2.h>
|
|
#include <asm/cpufeatures.h>
|
|
#include <asm/alternative-asm.h>
|
|
#include <asm/export.h>
|
|
#include <asm/nospec-branch.h>
|
|
|
|
.macro THUNK reg
|
|
.section .text.__x86.indirect_thunk
|
|
|
|
ENTRY(__x86_indirect_thunk_\reg)
|
|
CFI_STARTPROC
|
|
JMP_NOSPEC %\reg
|
|
CFI_ENDPROC
|
|
ENDPROC(__x86_indirect_thunk_\reg)
|
|
.endm
|
|
|
|
/*
|
|
* Despite being an assembler file we can't just use .irp here
|
|
* because __KSYM_DEPS__ only uses the C preprocessor and would
|
|
* only see one instance of "__x86_indirect_thunk_\reg" rather
|
|
* than one per register with the correct names. So we do it
|
|
* the simple and nasty way...
|
|
*/
|
|
#define __EXPORT_THUNK(sym) _ASM_NOKPROBE(sym); EXPORT_SYMBOL(sym)
|
|
#define EXPORT_THUNK(reg) __EXPORT_THUNK(__x86_indirect_thunk_ ## reg)
|
|
#define GENERATE_THUNK(reg) THUNK reg ; EXPORT_THUNK(reg)
|
|
|
|
GENERATE_THUNK(_ASM_AX)
|
|
GENERATE_THUNK(_ASM_BX)
|
|
GENERATE_THUNK(_ASM_CX)
|
|
GENERATE_THUNK(_ASM_DX)
|
|
GENERATE_THUNK(_ASM_SI)
|
|
GENERATE_THUNK(_ASM_DI)
|
|
GENERATE_THUNK(_ASM_BP)
|
|
#ifdef CONFIG_64BIT
|
|
GENERATE_THUNK(r8)
|
|
GENERATE_THUNK(r9)
|
|
GENERATE_THUNK(r10)
|
|
GENERATE_THUNK(r11)
|
|
GENERATE_THUNK(r12)
|
|
GENERATE_THUNK(r13)
|
|
GENERATE_THUNK(r14)
|
|
GENERATE_THUNK(r15)
|
|
#endif
|