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Unifying thfr.c with generalised thix.c for Posix threads. Copied from Perforce Change: 178928 ServerID: perforce.ravenbrook.com
93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
/* prmci3fr.c: PROTECTION MUTATOR CONTEXT INTEL 386 (FREEBSD)
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*
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* $Id$
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* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
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*
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* .purpose: This module implements the part of the protection module
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* that decodes the MutatorFaultContext.
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*
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*
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* SOURCES
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*
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* .source.i486: Intel486 Microprocessor Family Programmer's
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* Reference Manual
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*
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*
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* ASSUMPTIONS
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*
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* .sp: The stack pointer in the context is ESP (x86) or RSP (x86_64).
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*
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* .context.regroots: The root regs are EDI, ESI, EBX, EDX, ECX, EAX (or
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* their x86_64 equivalents) are assumed to be recorded in the context at
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* pointer-aligned boundaries.
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*/
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#include "prmcix.h"
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#include "prmci3.h"
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SRCID(prmci3fr, "$Id$");
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Addr MutatorFaultContextSP(MutatorFaultContext mfc)
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{
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return (Addr)mfc->ucontext->uc_mcontext.mc_esp; /* .sp */
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}
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Res MutatorFaultContextScan(ScanState ss, MutatorFaultContext mfc)
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{
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Res res;
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/* This scans the root registers (.context.regroots). It also unnecessarily
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scans the rest of the context. The optimisation to scan only relevant
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parts would be machine dependent. */
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res = TraceScanAreaTagged(
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ss,
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(Addr *)mfc->ucontext,
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(Addr *)((char *)mfc->ucontext + sizeof(*(mfc->ucontext)))
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);
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return res;
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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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 distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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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, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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