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124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/* proti6.c: PROTECTION MUTATOR CONTEXT (x64)
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*
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* $Id$
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* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
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*
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* .design: See <design/prot/> for the generic design of the interface
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* which is implemented in this module, including the contracts for the
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* functions.
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*
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* .purpose: This module implements the part of the protection module
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* that implements the MutatorFaultContext type.
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*
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*
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* SOURCES
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*
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* .source.amd64: AMD64 Architecture Programmer’s Manual Volume 3:
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* General-Purpose and System Instructions
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* <http://support.amd.com/us/Processor_TechDocs/24594_APM_v3.pdf>
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*
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*
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* ASSUMPTIONS
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*
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* .assume.null: It's always safe for Prot*StepInstruction to return
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* ResUNIMPL. A null implementation of this module would be overly
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* conservative but otherwise correct.
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*
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*/
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#include "mpm.h"
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#include "prmci6.h"
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SRCID(proti6, "$Id$");
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static Bool IsSimpleMov(Size *inslenReturn,
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MRef *srcReturn,
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MRef *destReturn,
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MutatorFaultContext context)
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{
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Byte *insvec;
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MRef faultmem;
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Prmci6DecodeFaultContext(&faultmem, &insvec, context);
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/* Unimplemented */
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UNUSED(inslenReturn);
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UNUSED(srcReturn);
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UNUSED(destReturn);
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return FALSE;
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}
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Bool ProtCanStepInstruction(MutatorFaultContext context)
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{
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Size inslen;
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MRef src;
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MRef dest;
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/* .assume.null */
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if(IsSimpleMov(&inslen, &src, &dest, context)) {
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return TRUE;
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}
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return FALSE;
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}
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Res ProtStepInstruction(MutatorFaultContext context)
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{
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Size inslen;
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MRef src;
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MRef dest;
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/* .assume.null */
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if(IsSimpleMov(&inslen, &src, &dest, context)) {
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*dest = *src;
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Prmci6StepOverIns(context, inslen);
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return ResOK;
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}
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return ResUNIMPL;
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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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
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS 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
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY 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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