mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-26 15:21:51 -08:00
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* prmci6.c: MUTATOR CONTEXT (x64)
|
|
*
|
|
* $Id$
|
|
* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
|
|
*
|
|
* .design: See <design/prmc> for the generic design of the interface
|
|
* which is implemented in this module, including the contracts for the
|
|
* functions.
|
|
*
|
|
* .purpose: Implement the mutator context module. <design/prmc>.
|
|
*
|
|
*
|
|
* SOURCES
|
|
*
|
|
* .source.amd64: AMD64 Architecture Programmer's Manual Volume 3:
|
|
* General-Purpose and System Instructions
|
|
* <https://www.amd.com/system/files/TechDocs/24594.pdf>
|
|
*
|
|
*
|
|
* ASSUMPTIONS
|
|
*
|
|
* .assume.null: It's always safe for MutatorContextCanStepInstruction
|
|
* to return FALSE. A null implementation of this module would be
|
|
* overly conservative but otherwise correct.
|
|
*
|
|
*/
|
|
|
|
#include "mpm.h"
|
|
#include "prmci6.h"
|
|
|
|
SRCID(prmci6, "$Id$");
|
|
|
|
#if !defined(MPS_ARCH_I6)
|
|
#error "prmci6.c is specific to MPS_ARCH_I6"
|
|
#endif
|
|
|
|
|
|
static Bool IsSimpleMov(Size *inslenReturn,
|
|
MRef *srcReturn,
|
|
MRef *destReturn,
|
|
MutatorContext context)
|
|
{
|
|
Byte *insvec;
|
|
MRef faultmem;
|
|
|
|
Prmci6DecodeFaultContext(&faultmem, &insvec, context);
|
|
/* Unimplemented */
|
|
UNUSED(inslenReturn);
|
|
UNUSED(srcReturn);
|
|
UNUSED(destReturn);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
Bool MutatorContextCanStepInstruction(MutatorContext context)
|
|
{
|
|
Size inslen;
|
|
MRef src;
|
|
MRef dest;
|
|
|
|
AVERT(MutatorContext, context);
|
|
|
|
/* .assume.null */
|
|
if(IsSimpleMov(&inslen, &src, &dest, context)) {
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
Res MutatorContextStepInstruction(MutatorContext context)
|
|
{
|
|
Size inslen;
|
|
MRef src;
|
|
MRef dest;
|
|
|
|
AVERT(MutatorContext, context);
|
|
|
|
/* .assume.null */
|
|
if(IsSimpleMov(&inslen, &src, &dest, context)) {
|
|
*dest = *src;
|
|
Prmci6StepOverIns(context, inslen);
|
|
return ResOK;
|
|
}
|
|
|
|
return ResUNIMPL;
|
|
}
|
|
|
|
|
|
/* C. COPYRIGHT AND LICENSE
|
|
*
|
|
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR 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.
|
|
*/
|