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85f87cf491
Its latest version merged from: ^/vendor/processor-trace/892e12c5a27bda5806d1e63269986bb4171b5a8b Sponsored by: DARPA, AFRL
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
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* Copyright (c) 2014-2019, Intel Corporation
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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 are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "pt_asid.h"
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#include "intel-pt.h"
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#include <string.h>
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int pt_asid_from_user(struct pt_asid *asid, const struct pt_asid *user)
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{
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if (!asid)
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return -pte_internal;
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pt_asid_init(asid);
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if (user) {
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size_t size;
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size = user->size;
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/* Ignore fields in the user's asid we don't know. */
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if (sizeof(*asid) < size)
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size = sizeof(*asid);
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/* Copy (portions of) the user's asid. */
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memcpy(asid, user, size);
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/* We copied user's size - fix it. */
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asid->size = sizeof(*asid);
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}
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return 0;
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}
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int pt_asid_to_user(struct pt_asid *user, const struct pt_asid *asid,
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size_t size)
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{
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if (!user || !asid)
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return -pte_internal;
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/* We need at least space for the size field. */
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if (size < sizeof(asid->size))
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return -pte_invalid;
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/* Only provide the fields we actually have. */
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if (sizeof(*asid) < size)
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size = sizeof(*asid);
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/* Copy (portions of) our asid to the user's. */
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memcpy(user, asid, size);
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/* We copied our size - fix it. */
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user->size = size;
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return 0;
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}
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int pt_asid_match(const struct pt_asid *lhs, const struct pt_asid *rhs)
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{
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uint64_t lcr3, rcr3, lvmcs, rvmcs;
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if (!lhs || !rhs)
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return -pte_internal;
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lcr3 = lhs->cr3;
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rcr3 = rhs->cr3;
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if (lcr3 != rcr3 && lcr3 != pt_asid_no_cr3 && rcr3 != pt_asid_no_cr3)
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return 0;
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lvmcs = lhs->vmcs;
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rvmcs = rhs->vmcs;
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if (lvmcs != rvmcs && lvmcs != pt_asid_no_vmcs &&
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rvmcs != pt_asid_no_vmcs)
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return 0;
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return 1;
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}
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