mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-20 04:30:55 -08:00
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/* proti6.c: PROTECTION MUTATOR CONTEXT (x64)
|
||
*
|
||
* $Id$
|
||
* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
|
||
*
|
||
* .design: See <design/prot/> for the generic design of the interface
|
||
* which is implemented in this module, including the contracts for the
|
||
* functions.
|
||
*
|
||
* .purpose: This module implements the part of the protection module
|
||
* that implements the MutatorFaultContext type.
|
||
*
|
||
*
|
||
* SOURCES
|
||
*
|
||
* .source.amd64: AMD64 Architecture Programmer’s Manual Volume 3:
|
||
* General-Purpose and System Instructions
|
||
* <http://support.amd.com/us/Processor_TechDocs/24594_APM_v3.pdf>
|
||
*
|
||
*
|
||
* ASSUMPTIONS
|
||
*
|
||
* .assume.null: It's always safe for Prot*StepInstruction to return
|
||
* ResUNIMPL. A null implementation of this module would be overly
|
||
* conservative but otherwise correct.
|
||
*
|
||
*/
|
||
|
||
#include "mpm.h"
|
||
#include "prmci6.h"
|
||
|
||
SRCID(proti6, "$Id$");
|
||
|
||
|
||
static Bool IsSimpleMov(Size *inslenReturn,
|
||
MRef *srcReturn,
|
||
MRef *destReturn,
|
||
MutatorFaultContext context)
|
||
{
|
||
Byte *insvec;
|
||
MRef faultmem;
|
||
|
||
Prmci6DecodeFaultContext(&faultmem, &insvec, context);
|
||
/* Unimplemented */
|
||
UNUSED(inslenReturn);
|
||
UNUSED(srcReturn);
|
||
UNUSED(destReturn);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
Bool ProtCanStepInstruction(MutatorFaultContext context)
|
||
{
|
||
Size inslen;
|
||
MRef src;
|
||
MRef dest;
|
||
|
||
/* .assume.null */
|
||
if(IsSimpleMov(&inslen, &src, &dest, context)) {
|
||
return TRUE;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
Res ProtStepInstruction(MutatorFaultContext context)
|
||
{
|
||
Size inslen;
|
||
MRef src;
|
||
MRef dest;
|
||
|
||
/* .assume.null */
|
||
if(IsSimpleMov(&inslen, &src, &dest, context)) {
|
||
*dest = *src;
|
||
Prmci6StepOverIns(context, inslen);
|
||
return ResOK;
|
||
}
|
||
|
||
return ResUNIMPL;
|
||
}
|
||
|
||
|
||
/* C. COPYRIGHT AND LICENSE
|
||
*
|
||
* Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
|
||
* All rights reserved. This is an open source license. Contact
|
||
* Ravenbrook for commercial licensing options.
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted provided that the following conditions are
|
||
* met:
|
||
*
|
||
* 1. Redistributions of source code must retain the above copyright
|
||
* notice, this list of conditions and the following disclaimer.
|
||
*
|
||
* 2. Redistributions in binary form must reproduce the above copyright
|
||
* notice, this list of conditions and the following disclaimer in the
|
||
* documentation and/or other materials provided with the distribution.
|
||
*
|
||
* 3. Redistributions in any form must be accompanied by information on how
|
||
* to obtain complete source code for this software and any accompanying
|
||
* software that uses this software. The source code must either be
|
||
* included in the distribution or be available for no more than the cost
|
||
* of distribution plus a nominal fee, and must be freely redistributable
|
||
* under reasonable conditions. For an executable file, complete source
|
||
* code means the source code for all modules it contains. It does not
|
||
* include source code for modules or files that typically accompany the
|
||
* major components of the operating system on which the executable file
|
||
* runs.
|
||
*
|
||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
||
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
|
||
* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
*/
|