blob: 7591bab060f700a506571dccfa1adb8232995325 (
plain)
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
37
38
|
/* 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
|
