mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-24 14:30:43 -08:00
94e3fff083
Add missing default: cases to switch statements. Copied from Perforce Change: 185226 ServerID: perforce.ravenbrook.com
148 lines
5.5 KiB
C
148 lines
5.5 KiB
C
/* prmci6xc.c: PROTECTION MUTATOR CONTEXT x64 (MAC OS X)
|
|
*
|
|
* $Id$
|
|
* Copyright (c) 2001-2014 Ravenbrook Limited. See end of file for license.
|
|
*
|
|
* .purpose: This module implements the part of the protection module
|
|
* that decodes the MutatorFaultContext.
|
|
*
|
|
*
|
|
* SOURCES
|
|
*
|
|
* .source.linux.kernel: Linux kernel source files.
|
|
*
|
|
*
|
|
* ASSUMPTIONS
|
|
*
|
|
* .context.regroots: The root regs are assumed to be recorded in the context
|
|
* at pointer-aligned boundaries.
|
|
*
|
|
* .assume.regref: The resisters in the context can be modified by
|
|
* storing into an MRef pointer.
|
|
*/
|
|
|
|
#include "prmcxc.h"
|
|
#include "prmci6.h"
|
|
|
|
SRCID(prmci6li, "$Id$");
|
|
|
|
|
|
/* Prmci6AddressHoldingReg -- return an address of a register in a context */
|
|
|
|
MRef Prmci6AddressHoldingReg(MutatorFaultContext mfc, unsigned int regnum)
|
|
{
|
|
AVER(NONNEGATIVE(regnum));
|
|
AVER(regnum <= 15);
|
|
|
|
/* .assume.regref */
|
|
/* The register numbers (REG_RAX etc.) are defined in <ucontext.h>
|
|
but only if _XOPEN_SOURCE is defined: see .feature.xc in
|
|
config.h. */
|
|
/* MRef (a Word *) is not compatible with pointers to the register
|
|
types (actually a __uint64_t). To avoid aliasing optimization
|
|
problems, The registers are cast through (char *) */
|
|
switch (regnum) {
|
|
case 0: return (MRef)((char *)&mfc->threadState->__rax);
|
|
case 1: return (MRef)((char *)&mfc->threadState->__rcx);
|
|
case 2: return (MRef)((char *)&mfc->threadState->__rdx);
|
|
case 3: return (MRef)((char *)&mfc->threadState->__rbx);
|
|
case 4: return (MRef)((char *)&mfc->threadState->__rsp);
|
|
case 5: return (MRef)((char *)&mfc->threadState->__rbp);
|
|
case 6: return (MRef)((char *)&mfc->threadState->__rsi);
|
|
case 7: return (MRef)((char *)&mfc->threadState->__rdi);
|
|
case 8: return (MRef)((char *)&mfc->threadState->__r8);
|
|
case 9: return (MRef)((char *)&mfc->threadState->__r9);
|
|
case 10: return (MRef)((char *)&mfc->threadState->__r10);
|
|
case 11: return (MRef)((char *)&mfc->threadState->__r11);
|
|
case 12: return (MRef)((char *)&mfc->threadState->__r12);
|
|
case 13: return (MRef)((char *)&mfc->threadState->__r13);
|
|
case 14: return (MRef)((char *)&mfc->threadState->__r14);
|
|
case 15: return (MRef)((char *)&mfc->threadState->__r15);
|
|
default:
|
|
NOTREACHED;
|
|
return NULL; /* Avoids compiler warning. */
|
|
}
|
|
}
|
|
|
|
|
|
/* Prmci3DecodeFaultContext -- decode fault to find faulting address and IP */
|
|
|
|
void Prmci6DecodeFaultContext(MRef *faultmemReturn,
|
|
Byte **insvecReturn,
|
|
MutatorFaultContext mfc)
|
|
{
|
|
*faultmemReturn = (MRef)mfc->address;
|
|
*insvecReturn = (Byte*)mfc->threadState->__rip;
|
|
}
|
|
|
|
|
|
/* Prmci3StepOverIns -- modify context to step over instruction */
|
|
|
|
void Prmci6StepOverIns(MutatorFaultContext mfc, Size inslen)
|
|
{
|
|
mfc->threadState->__rip += (Word)inslen;
|
|
}
|
|
|
|
|
|
Addr MutatorFaultContextSP(MutatorFaultContext mfc)
|
|
{
|
|
return (Addr)mfc->threadState->__rsp;
|
|
}
|
|
|
|
|
|
Res MutatorFaultContextScan(ScanState ss, MutatorFaultContext mfc)
|
|
{
|
|
x86_thread_state64_t *mc;
|
|
Res res;
|
|
|
|
/* This scans the root registers (.context.regroots). It also
|
|
unnecessarily scans the rest of the context. The optimisation
|
|
to scan only relevant parts would be machine dependent. */
|
|
mc = mfc->threadState;
|
|
res = TraceScanAreaTagged(ss,
|
|
(Addr *)mc,
|
|
(Addr *)((char *)mc + sizeof(*mc)));
|
|
return res;
|
|
}
|
|
|
|
|
|
/* C. COPYRIGHT AND LICENSE
|
|
*
|
|
* Copyright (C) 2001-2014 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.
|
|
*/
|