thunk_32.S 1.1 KB
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/*
 * 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>
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	#include <asm/asm.h>
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	#include <asm/dwarf2.h>
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	/* put return address in eax (arg1) */
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	.macro THUNK name, func, put_ret_addr_in_eax=0
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	.globl \name
\name:
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	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
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	.if \put_ret_addr_in_eax
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	/* Place EIP in the arg1 */
	movl 3*4(%esp), %eax
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	.endif

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	call \func
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	popl_cfi %edx
	CFI_RESTORE edx
	popl_cfi %ecx
	CFI_RESTORE ecx
	popl_cfi %eax
	CFI_RESTORE eax
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	ret
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	CFI_ENDPROC
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	_ASM_NOKPROBE(\name)
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	.endm

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#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
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#endif
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#endif