1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
 4 * Copyright 2008 by Steven Rostedt, Red Hat, Inc
 5 *  (inspired by Andi Kleen's thunk_64.S)
 
 6 */
 7	#include <linux/linkage.h>
 8	#include <asm/asm.h>
 9	#include <asm/export.h>
10
11	/* put return address in eax (arg1) */
12	.macro THUNK name, func, put_ret_addr_in_eax=0
13SYM_CODE_START_NOALIGN(\name)
 
14	pushl %eax
15	pushl %ecx
16	pushl %edx
17
18	.if \put_ret_addr_in_eax
19	/* Place EIP in the arg1 */
20	movl 3*4(%esp), %eax
21	.endif
22
23	call \func
24	popl %edx
25	popl %ecx
26	popl %eax
27	RET
28	_ASM_NOKPROBE(\name)
29SYM_CODE_END(\name)
30	.endm
31
32	THUNK preempt_schedule_thunk, preempt_schedule
33	THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
34	EXPORT_SYMBOL(preempt_schedule_thunk)
35	EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
 
 
 
 
 
 
 
36

 
 1/*
 2 * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
 3 * Copyright 2008 by Steven Rostedt, Red Hat, Inc
 4 *  (inspired by Andi Kleen's thunk_64.S)
 5 * Subject to the GNU public license, v.2. No warranty of any kind.
 6 */
 7	#include <linux/linkage.h>
 8	#include <asm/asm.h>
 9	#include <asm/export.h>
10
11	/* put return address in eax (arg1) */
12	.macro THUNK name, func, put_ret_addr_in_eax=0
13	.globl \name
14\name:
15	pushl %eax
16	pushl %ecx
17	pushl %edx
18
19	.if \put_ret_addr_in_eax
20	/* Place EIP in the arg1 */
21	movl 3*4(%esp), %eax
22	.endif
23
24	call \func
25	popl %edx
26	popl %ecx
27	popl %eax
28	ret
29	_ASM_NOKPROBE(\name)
 
30	.endm
31
32#ifdef CONFIG_TRACE_IRQFLAGS
33	THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
34	THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
35#endif
36
37#ifdef CONFIG_PREEMPT
38	THUNK ___preempt_schedule, preempt_schedule
39	THUNK ___preempt_schedule_notrace, preempt_schedule_notrace
40	EXPORT_SYMBOL(___preempt_schedule)
41	EXPORT_SYMBOL(___preempt_schedule_notrace)
42#endif
43