mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-26 15:21:51 -08:00
142 lines
4.8 KiB
C
142 lines
4.8 KiB
C
/* prmcxci3.c: MUTATOR CONTEXT (macOS, IA-32)
|
|
*
|
|
* $Id$
|
|
* Copyright (c) 2001-2018 Ravenbrook Limited. See end of file for license.
|
|
*
|
|
* .purpose: Implement the mutator context module. See <design/prmc/>.
|
|
*
|
|
*
|
|
* SOURCES
|
|
*
|
|
* .source.i486: Intel486 Microprocessor Family Programmer's
|
|
* Reference Manual
|
|
*
|
|
*
|
|
* ASSUMPTIONS
|
|
*
|
|
* .assume.regref: The registers in the context can be modified by
|
|
* storing into an MRef pointer.
|
|
*/
|
|
|
|
#include "prmcxc.h"
|
|
#include "prmci3.h"
|
|
|
|
SRCID(prmcxci3, "$Id$");
|
|
|
|
#if !defined(MPS_OS_XC) || !defined(MPS_ARCH_I3)
|
|
#error "prmcxci3.c is specific to MPS_OS_XC and MPS_ARCH_I3"
|
|
#endif
|
|
|
|
|
|
/* Prmci3AddressHoldingReg -- return an address of a register in a context */
|
|
|
|
MRef Prmci3AddressHoldingReg(MutatorContext context, unsigned int regnum)
|
|
{
|
|
THREAD_STATE_S *threadState;
|
|
|
|
AVERT(MutatorContext, context);
|
|
AVER(NONNEGATIVE(regnum));
|
|
AVER(regnum <= 7);
|
|
|
|
threadState = context->threadState;
|
|
|
|
/* .source.i486 */
|
|
/* .assume.regref */
|
|
/* The register numbers (REG_EAX etc.) are defined in <ucontext.h>
|
|
but only if _GNU_SOURCE is defined: see .feature.li in
|
|
config.h. */
|
|
/* TODO: The current arrangement of the fix operation (taking a Ref *)
|
|
forces us to pun these registers (actually `int` on LII3GC). We can
|
|
suppress the warning by casting through `void *` and this might make
|
|
it safe, but does it really? RB 2012-09-10 */
|
|
switch (regnum) {
|
|
case 0: return (void *)&threadState->__eax;
|
|
case 1: return (void *)&threadState->__ecx;
|
|
case 2: return (void *)&threadState->__edx;
|
|
case 3: return (void *)&threadState->__ebx;
|
|
case 4: return (void *)&threadState->__esp;
|
|
case 5: return (void *)&threadState->__ebp;
|
|
case 6: return (void *)&threadState->__esi;
|
|
case 7: return (void *)&threadState->__edi;
|
|
default:
|
|
NOTREACHED;
|
|
return NULL; /* Avoids compiler warning. */
|
|
}
|
|
}
|
|
|
|
|
|
/* Prmci3DecodeFaultContext -- decode fault to find faulting address and IP */
|
|
|
|
void Prmci3DecodeFaultContext(MRef *faultmemReturn,
|
|
Byte **insvecReturn,
|
|
MutatorContext context)
|
|
{
|
|
AVER(faultmemReturn != NULL);
|
|
AVER(insvecReturn != NULL);
|
|
AVERT(MutatorContext, context);
|
|
AVER(context->var == MutatorContextFAULT);
|
|
|
|
*faultmemReturn = (MRef)context->address;
|
|
*insvecReturn = (Byte*)context->threadState->__eip;
|
|
}
|
|
|
|
|
|
/* Prmci3StepOverIns -- modify context to step over instruction */
|
|
|
|
void Prmci3StepOverIns(MutatorContext context, Size inslen)
|
|
{
|
|
AVERT(MutatorContext, context);
|
|
AVER(0 < inslen);
|
|
|
|
context->threadState->__eip += (Word)inslen;
|
|
}
|
|
|
|
|
|
Addr MutatorContextSP(MutatorContext context)
|
|
{
|
|
AVERT(MutatorContext, context);
|
|
|
|
return (Addr)context->threadState->__esp;
|
|
}
|
|
|
|
|
|
/* C. COPYRIGHT AND LICENSE
|
|
*
|
|
* Copyright (C) 2001-2018 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.
|
|
*/
|