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gerrit-public.fairphone.software / kernel / msm-5.4 / 0ad6e3c5199be12c9745da8f8b9e3c9f8066c235 / . / arch / x86 / lib / thunk_32.S
blob: e9acf5f4fc923caa2bd71cfa175462617130ed89 [file] [log] [blame]
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]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 */
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]7 #include <linux/linkage.h>
Masami Hiramatsu98def1d2014-04-17 17:17:26 +0900[diff] [blame]8 #include <asm/asm.h>
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]9
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]10 /* put return address in eax (arg1) */
Oleg Nesterov0ad6e3c2014-09-21 20:41:53 +0200[diff] [blame^]11 .macro THUNK name, func, put_ret_addr_in_eax=0
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]12 .globl \name
13\name:
14 pushl %eax
15 pushl %ecx
16 pushl %edx
Oleg Nesterov0ad6e3c2014-09-21 20:41:53 +0200[diff] [blame^]17
18 .if \put_ret_addr_in_eax
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]19 /* Place EIP in the arg1 */
20 movl 3*4(%esp), %eax
Oleg Nesterov0ad6e3c2014-09-21 20:41:53 +0200[diff] [blame^]21 .endif
22
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]23 call \func
24 popl %edx
25 popl %ecx
26 popl %eax
27 ret
Masami Hiramatsu98def1d2014-04-17 17:17:26 +0900[diff] [blame]28 _ASM_NOKPROBE(\name)
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]29 .endm
30
Oleg Nesterov0ad6e3c2014-09-21 20:41:53 +0200[diff] [blame^]31#ifdef CONFIG_TRACE_IRQFLAGS
32 THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
33 THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
Steven Rostedt81d68a92008-05-12 21:20:42 +0200[diff] [blame]34#endif
Oleg Nesterov0ad6e3c2014-09-21 20:41:53 +0200[diff] [blame^]35
36#ifdef CONFIG_PREEMPT
37 THUNK ___preempt_schedule, preempt_schedule
38#ifdef CONFIG_CONTEXT_TRACKING
39 THUNK ___preempt_schedule_context, preempt_schedule_context
40#endif
41#endif
42