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67 lines
1.3 KiB
67 lines
1.3 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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.text
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.align 4
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#if defined(TARGET_MAC)
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.globl _DFSet
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.globl _DidTest
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.globl _Flags
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#define DFSet _DFSet
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#define DidTest _DidTest
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#define Flags _Flags
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.globl _SetAndClearDF
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_SetAndClearDF:
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#else
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.globl SetAndClearDF
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SetAndClearDF:
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#endif
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std
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movl $1, DFSet
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/*
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* Delay a little while to make it more likely that a signal
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* will arrive while DF is set.
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*/
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mov $0x1000, %eax
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.L3:
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dec %eax
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jne .L3
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movl $0, DFSet
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cld
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ret
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.align 4
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#if defined(TARGET_MAC)
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.globl _SignalHandler
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_SignalHandler:
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#else
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.globl SignalHandler
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SignalHandler:
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#endif
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/*
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* Save the flags in 'Flags'.
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*/
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pushf
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pop %eax
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mov %eax, Flags
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/*
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* The test is only interesting if the signal arrived while DF was
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* set (above in SetAndClearDF).
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*/
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mov DFSet, %eax
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mov %eax, DidTest
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ret
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