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47 lines
1.4 KiB
47 lines
1.4 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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#include "asm_macros.h"
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DECLARE_FUNCTION(CheckFlags)
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.global NAME(CheckFlags)
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NAME(CheckFlags):
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BEGIN_STACK_FRAME
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push GBX_REG
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push GCX_REG
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# Set the ZF and OF flags.
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mov $0x80000000, RETURN_REG
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shl $32, RETURN_REG
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shl $1, RETURN_REG
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# Save the flags register before the analysis routine.
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pushf
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pop GBX_REG
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mov PARAM1, RETURN_REG
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mov %ebx, (RETURN_REG)
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# The tool will create an artificial RTN here and add instrumentation.
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# Save the flags register after the analysis routine.
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pushf
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pop GCX_REG
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mov PARAM2, RETURN_REG
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mov %ecx, (RETURN_REG)
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# Compare the flags before and after the analysis routine.
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cmp %ebx, %ecx
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jnz end
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# GAX is not zero since it holds a valid address on the stack. If the flags are identical, indicate success.
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mov $0, RETURN_REG
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end:
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pop GCX_REG
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pop GBX_REG
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END_STACK_FRAME
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ret
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