39 lines
861 B
ArmAsm
39 lines
861 B
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
|
||
|
|
* Copyright 2008 by Steven Rostedt, Red Hat, Inc
|
||
|
|
* (inspired by Andi Kleen's thunk_64.S)
|
||
|
|
*/
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/asm.h>
|
||
|
|
#include <asm/export.h>
|
||
|
|
|
||
|
|
/* put return address in eax (arg1) */
|
||
|
|
.macro THUNK name, func, put_ret_addr_in_eax=0
|
||
|
|
SYM_CODE_START_NOALIGN(\name)
|
||
|
|
pushl %eax
|
||
|
|
pushl %ecx
|
||
|
|
pushl %edx
|
||
|
|
|
||
|
|
.if \put_ret_addr_in_eax
|
||
|
|
/* Place EIP in the arg1 */
|
||
|
|
movl 3*4(%esp), %eax
|
||
|
|
.endif
|
||
|
|
|
||
|
|
call \func
|
||
|
|
popl %edx
|
||
|
|
popl %ecx
|
||
|
|
popl %eax
|
||
|
|
RET
|
||
|
|
_ASM_NOKPROBE(\name)
|
||
|
|
SYM_CODE_END(\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
|
||
|
|
|