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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /*
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- /*
- * GC related routines
- *
- */
- #include "primpl.h"
-
- extern APIRET (* APIENTRY QueryThreadContext)(TID, ULONG, PCONTEXTRECORD);
-
- PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np)
- {
- CONTEXTRECORD context;
- context.ContextFlags = CONTEXT_INTEGER;
-
- if (_PR_IS_NATIVE_THREAD(t)) {
- context.ContextFlags |= CONTEXT_CONTROL;
- if (QueryThreadContext(t->md.handle, CONTEXT_CONTROL, &context)) {
- t->md.gcContext[0] = context.ctx_RegEax;
- t->md.gcContext[1] = context.ctx_RegEbx;
- t->md.gcContext[2] = context.ctx_RegEcx;
- t->md.gcContext[3] = context.ctx_RegEdx;
- t->md.gcContext[4] = context.ctx_RegEsi;
- t->md.gcContext[5] = context.ctx_RegEdi;
- t->md.gcContext[6] = context.ctx_RegEsp;
- t->md.gcContext[7] = context.ctx_RegEbp;
- *np = PR_NUM_GCREGS;
- } else {
- PR_ASSERT(0);/* XXX */
- }
- }
- return (PRWord *)&t->md.gcContext;
- }
-
- /* This function is not used right now, but is left as a reference.
- * If you ever need to get the fiberID from the currently running fiber,
- * this is it.
- */
- void *
- GetMyFiberID()
- {
- void *fiberData = 0;
-
- /* A pointer to our tib entry is found at FS:[18]
- * At offset 10h is the fiberData pointer. The context of the
- * fiber is stored in there.
- */
- #ifdef HAVE_ASM
- __asm {
- mov EDX, FS:[18h]
- mov EAX, DWORD PTR [EDX+10h]
- mov [fiberData], EAX
- }
- #endif
-
- return fiberData;
- }
-