Chloe M.
35 lines
699 B
C
35 lines
699 B
C
/*
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* Copyright (c) 2026, Chloe M.
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* Provided under the BSD-3 clause.
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*
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* Description: Kernel entry fence
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* Author: Chloe M.
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*/
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#ifndef _MACHINE_KFENCE_H_
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#define _MACHINE_KFENCE_H_ 1
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/*
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* Kernel fence for interrupt entries that do
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* not have an error code
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*/
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#define KFENCE \
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testq $0x3, 8(%rsp) ; \
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jz 1f ; \
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lfence ; \
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swapgs ; \
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1: nop
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/*
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* Kernel fence for interrupt entries that
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* have an error code
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*/
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#define KFENCE_EC \
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testq $0x3, 16(%rsp) ; \
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jz 1f ; \
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lfence ; \
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swapgs ; \
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1: nop
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#endif /* !_MACHINE_KFENCE_H_ */
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