The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/nsprpub/pr/src/md/os2/os2gc.c	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,58 @@
     1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +/*
    1.10 + * GC related routines
    1.11 + *
    1.12 + */
    1.13 +#include "primpl.h"
    1.14 +
    1.15 +PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np) 
    1.16 +{
    1.17 +    CONTEXTRECORD context;
    1.18 +    context.ContextFlags = CONTEXT_INTEGER;
    1.19 +
    1.20 +    if (_PR_IS_NATIVE_THREAD(t)) {
    1.21 +        context.ContextFlags |= CONTEXT_CONTROL;
    1.22 +        if (QueryThreadContext(t->md.handle, CONTEXT_CONTROL, &context)) {
    1.23 +            t->md.gcContext[0] = context.ctx_RegEax;
    1.24 +            t->md.gcContext[1] = context.ctx_RegEbx;
    1.25 +            t->md.gcContext[2] = context.ctx_RegEcx;
    1.26 +            t->md.gcContext[3] = context.ctx_RegEdx;
    1.27 +            t->md.gcContext[4] = context.ctx_RegEsi;
    1.28 +            t->md.gcContext[5] = context.ctx_RegEdi;
    1.29 +            t->md.gcContext[6] = context.ctx_RegEsp;
    1.30 +            t->md.gcContext[7] = context.ctx_RegEbp;
    1.31 +            *np = PR_NUM_GCREGS;
    1.32 +        } else {
    1.33 +            PR_ASSERT(0);/* XXX */
    1.34 +        }
    1.35 +    }
    1.36 +    return (PRWord *)&t->md.gcContext;
    1.37 +}
    1.38 +
    1.39 +/* This function is not used right now, but is left as a reference.
    1.40 + * If you ever need to get the fiberID from the currently running fiber, 
    1.41 + * this is it.
    1.42 + */
    1.43 +void *
    1.44 +GetMyFiberID()
    1.45 +{
    1.46 +    void *fiberData = 0;
    1.47 +
    1.48 +    /* A pointer to our tib entry is found at FS:[18]
    1.49 +     * At offset 10h is the fiberData pointer.  The context of the 
    1.50 +     * fiber is stored in there.  
    1.51 +     */
    1.52 +#ifdef HAVE_ASM
    1.53 +    __asm {
    1.54 +        mov    EDX, FS:[18h]
    1.55 +        mov    EAX, DWORD PTR [EDX+10h]
    1.56 +        mov    [fiberData], EAX
    1.57 +    }
    1.58 +#endif
    1.59 +  
    1.60 +    return fiberData;
    1.61 +}