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141 lines
4.3 KiB
C
141 lines
4.3 KiB
C
/* prmcw3i6.c: MUTATOR CONTEXT INTEL x64 (Windows)
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*
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* $Id$
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* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
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*
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* PURPOSE
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*
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* .purpose: Implement the mutator context module. <design/prmc>.
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*
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* SOURCES
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*
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*
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* ASSUMPTIONS
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*
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* .assume.regref: The registers in the context can be modified by
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* storing into an MRef pointer.
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*
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* .assume.sp: The stack pointer is stored in CONTEXT.Rsp. This
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* requires CONTEXT_CONTROL to be set in ContextFlags when
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* GetThreadContext is called.
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*/
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#include "prmcw3.h"
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#include "prmci6.h"
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#include "mpm.h"
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SRCID(prmcw3i6, "$Id$");
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#if !defined(MPS_OS_W3) || !defined(MPS_ARCH_I6)
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#error "prmcw3i6.c is specific to MPS_OS_W3 and MPS_ARCH_I6"
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#endif
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/* Prmci6AddressHoldingReg -- Return an address for a given machine register */
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MRef Prmci6AddressHoldingReg(MutatorContext context, unsigned int regnum)
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{
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PCONTEXT wincont;
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AVERT(MutatorContext, context);
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AVER(context->var == MutatorContextFAULT);
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AVER(NONNEGATIVE(regnum));
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AVER(regnum <= 16);
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wincont = context->the.ep->ContextRecord;
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switch (regnum) {
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case 0: return (MRef)&wincont->Rax;
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case 1: return (MRef)&wincont->Rcx;
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case 2: return (MRef)&wincont->Rdx;
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case 3: return (MRef)&wincont->Rbx;
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case 4: return (MRef)&wincont->Rsp;
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case 5: return (MRef)&wincont->Rbp;
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case 6: return (MRef)&wincont->Rsi;
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case 7: return (MRef)&wincont->Rdi;
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case 8: return (MRef)&wincont->R8;
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case 9: return (MRef)&wincont->R9;
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case 10: return (MRef)&wincont->R10;
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case 11: return (MRef)&wincont->R11;
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case 12: return (MRef)&wincont->R12;
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case 13: return (MRef)&wincont->R13;
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case 14: return (MRef)&wincont->R14;
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case 15: return (MRef)&wincont->R15;
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default:
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NOTREACHED;
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return NULL; /* suppress warning */
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}
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}
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/* Prmci6DecodeFaultContext -- decode fault context */
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void Prmci6DecodeFaultContext(MRef *faultmemReturn, Byte **insvecReturn,
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MutatorContext context)
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{
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LPEXCEPTION_RECORD er;
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AVER(faultmemReturn != NULL);
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AVER(insvecReturn != NULL);
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AVERT(MutatorContext, context);
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AVER(context->var == MutatorContextFAULT);
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er = context->the.ep->ExceptionRecord;
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/* Assert that this is an access violation. The computation of */
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/* faultmem depends on this. */
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AVER(er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION);
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*faultmemReturn = (MRef)er->ExceptionInformation[1];
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*insvecReturn = (Byte*)context->the.ep->ContextRecord->Rip;
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}
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/* Prmci6StepOverIns -- skip an instruction by changing the context */
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void Prmci6StepOverIns(MutatorContext context, Size inslen)
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{
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AVERT(MutatorContext, context);
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AVER(context->var == MutatorContextFAULT);
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context->the.ep->ContextRecord->Rip += (DWORD64)inslen;
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}
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Addr MutatorContextSP(MutatorContext context)
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{
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AVERT(MutatorContext, context);
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AVER(context->var == MutatorContextTHREAD);
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return (Addr)context->the.context.Rsp; /* .assume.sp */
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
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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
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* distribution.
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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 AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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