linux/arch/x86/lib/thunk_32.S
Jan Beulich f74954f01e x86: Unwind-annotate thunk_32.S
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/542291CA0200007800038085@mail.emea.novell.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-10-08 12:31:45 +02:00

52 lines
1.1 KiB
ArmAsm

/*
* 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)
* Subject to the GNU public license, v.2. No warranty of any kind.
*/
#include <linux/linkage.h>
#include <asm/asm.h>
#include <asm/dwarf2.h>
/* put return address in eax (arg1) */
.macro THUNK name, func, put_ret_addr_in_eax=0
.globl \name
\name:
CFI_STARTPROC
pushl_cfi %eax
CFI_REL_OFFSET eax, 0
pushl_cfi %ecx
CFI_REL_OFFSET ecx, 0
pushl_cfi %edx
CFI_REL_OFFSET edx, 0
.if \put_ret_addr_in_eax
/* Place EIP in the arg1 */
movl 3*4(%esp), %eax
.endif
call \func
popl_cfi %edx
CFI_RESTORE edx
popl_cfi %ecx
CFI_RESTORE ecx
popl_cfi %eax
CFI_RESTORE eax
ret
CFI_ENDPROC
_ASM_NOKPROBE(\name)
.endm
#ifdef CONFIG_TRACE_IRQFLAGS
THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
#endif
#ifdef CONFIG_PREEMPT
THUNK ___preempt_schedule, preempt_schedule
#ifdef CONFIG_CONTEXT_TRACKING
THUNK ___preempt_schedule_context, preempt_schedule_context
#endif
#endif