62 lines
1.2 KiB
ArmAsm
62 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Save registers before calling assembly functions. This avoids
|
|
* disturbance of register allocation in some inline assembly constructs.
|
|
* Copyright 2001,2002 by Andi Kleen, SuSE Labs.
|
|
*/
|
|
#include <linux/linkage.h>
|
|
#include "calling.h"
|
|
#include <asm/asm.h>
|
|
#include <asm/export.h>
|
|
|
|
/* rdi: arg1 ... normal C conventions. rax is saved/restored. */
|
|
.macro THUNK name, func, put_ret_addr_in_rdi=0
|
|
SYM_FUNC_START_NOALIGN(\name)
|
|
pushq %rbp
|
|
movq %rsp, %rbp
|
|
|
|
pushq %rdi
|
|
pushq %rsi
|
|
pushq %rdx
|
|
pushq %rcx
|
|
pushq %rax
|
|
pushq %r8
|
|
pushq %r9
|
|
pushq %r10
|
|
pushq %r11
|
|
|
|
.if \put_ret_addr_in_rdi
|
|
/* 8(%rbp) is return addr on stack */
|
|
movq 8(%rbp), %rdi
|
|
.endif
|
|
|
|
call \func
|
|
jmp .L_restore
|
|
SYM_FUNC_END(\name)
|
|
_ASM_NOKPROBE(\name)
|
|
.endm
|
|
|
|
#ifdef CONFIG_PREEMPTION
|
|
THUNK preempt_schedule_thunk, preempt_schedule
|
|
THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
|
|
EXPORT_SYMBOL(preempt_schedule_thunk)
|
|
EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
|
|
#endif
|
|
|
|
#ifdef CONFIG_PREEMPTION
|
|
SYM_CODE_START_LOCAL_NOALIGN(.L_restore)
|
|
popq %r11
|
|
popq %r10
|
|
popq %r9
|
|
popq %r8
|
|
popq %rax
|
|
popq %rcx
|
|
popq %rdx
|
|
popq %rsi
|
|
popq %rdi
|
|
popq %rbp
|
|
ret
|
|
_ASM_NOKPROBE(.L_restore)
|
|
SYM_CODE_END(.L_restore)
|
|
#endif
|