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f89e49acfe
Includes hairy merging of stack manipulation code and may need further work on each platform. Copied from Perforce Change: 189545 ServerID: perforce.ravenbrook.com
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/* ssxci3.c: STACK SCANNING FOR OS X ON IA-32
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*
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* $Id$
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* Copyright (c) 2012-2014 Ravenbrook Limited. See end of file for license.
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*
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* This decodes the stack context and scans the registers which may
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* contain roots. See <design/ss/>.
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*/
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#include "mpm.h"
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SRCID(ssxci3, "$Id$");
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#if !defined(MPS_OS_XC) || !defined(MPS_ARCH_I3)
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#error "ssxci3.c is specific to MPS_OS_XC and MPS_ARCH_I3."
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#endif
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/* Offset of ESP in the jmp_buf in bytes, as defined in _setjmp.s.
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* See the implementation of _setjmp in
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* <http://www.opensource.apple.com/source/Libc/Libc-825.24/i386/sys/_setjmp.s> */
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#define JB_ESP 36
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/* StackContextStackHot -- hot end of the mutator's stack
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*
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* Retrieve the stack pointer at the point when the context was saved
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* by STACK_CONTEXT_SAVE.
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*/
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Word *StackContextStackHot(StackContext sc)
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{
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Word **p_esp = PointerAdd(&sc->jumpBuffer, JB_ESP);
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return *p_esp;
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}
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/* StackContextScan -- scan references in the stack context */
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Res StackContextScan(ScanState ss, StackContext sc,
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mps_area_scan_t scan_area, void *closure)
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{
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return TraceScanArea(ss, (void *)sc, (void *)(sc + 1),
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scan_area, closure);
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2012-2014 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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