summaryrefslogtreecommitdiff
path: root/arch/x86/entry/thunk_32.S
blob: 0103e103a6573adab040c4e41b588edcdf7a7ecd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/* 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/export.h>
	#include <linux/linkage.h>
	#include <asm/asm.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

	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)