GNU Linux-libre 4.14.266-gnu1
[releases.git] / arch / x86 / entry / thunk_32.S
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