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b3a7db3b06
Ifuncs selectors dispatch copyin(9) family to the suitable variant, to set rflags.AC around userspace access. Rflags.AC bit is cleared in all kernel entry points unconditionally even on machines not supporting SMAP. Reviewed by: jhb Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D13838
46 lines
1.7 KiB
ArmAsm
46 lines
1.7 KiB
ArmAsm
/*-
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* Copyright (c) 2016 Microsoft Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "assym.inc"
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#include <machine/psl.h>
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#include <machine/asmacros.h>
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#include <machine/specialreg.h>
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/*
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* This is the Hyper-V vmbus channel direct callback interrupt.
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* Only used when it is running on Hyper-V.
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*/
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.text
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SUPERALIGN_TEXT
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INTR_HANDLER vmbus_isr
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FAKE_MCOUNT(TF_RIP(%rsp))
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movq %rsp, %rdi
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call vmbus_handle_intr
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MEXITCOUNT
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jmp doreti
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