/* ssw3i3.c: WIN32/INTEL STACK SCANNING
*
* $Id: //info.ravenbrook.com/project/mps/version/1.107/code/ssw3i3.c#1 $
* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
*
* This scans the stack and fixes the registers which may contain
* roots. See <design/thread-manager/>.
*
* The registers edi, esi, ebx are the registers defined to be preserved
* across function calls and therefore may contain roots.
* These are pushed on the stack for scanning.
*
* ASSUMPTIONS
*
* .align: The stack pointer is assumed to be aligned on a word
* boundary.
*/
#include "mpm.h"
SRCID(ssw3i3, "$Id: //info.ravenbrook.com/project/mps/version/1.107/code/ssw3i3.c#1 $");
Res StackScan(ScanState ss, Addr *stackBot)
{
Addr *stackTop;
Res res;
__asm {
push edi /* these registers are the save registers */
push esi /* and so may contain roots. They are pushed */
push ebx /* for scanning */
mov stackTop, esp /* stack pointer */
}
AVER(AddrIsAligned((Addr)stackTop, sizeof(Addr))); /* .align */
res = TraceScanArea(ss, stackTop, stackBot);
__asm {
add esp, 0xc /* pop 3 registers to restore the stack pointer */
}
return res;
}
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2001-2002 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
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