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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* GC related routines
*
*/
#include "primpl.h"
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;
}
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