path: root/bridges/source/cpp_uno/gcc3_linux_powerpc/cpp2uno.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <string.h>

#include <com/sun/star/uno/genfunc.hxx>
#include <sal/log.hxx>
#include <uno/data.h>
#include <typelib/typedescription.hxx>

#include "bridge.hxx"
#include "cppinterfaceproxy.hxx"
#include "types.hxx"
#include "vtablefactory.hxx"

#include "share.hxx"


using namespace ::com::sun::star::uno;

namespace
{

static typelib_TypeClass cpp2uno_call(
    bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
    const typelib_TypeDescription * pMemberTypeDescr,
    typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
    sal_Int32 nParams, typelib_MethodParameter * pParams,
        void ** gpreg, void ** fpreg, void ** ovrflw,
    sal_Int64 * pRegisterReturn /* space for register return */ )
{
        int ng = 0; //number of gpr registers used
#ifndef __NO_FPRS__
        int nf = 0; //number of fpr registers used
#endif
        void ** pCppStack; //temporary stack pointer

        // gpreg:  [ret *], this, [gpr params]
        // fpreg:  [fpr params]
        // ovrflw: [gpr or fpr params (properly aligned)]

    // return
    typelib_TypeDescription * pReturnTypeDescr = 0;
    if (pReturnTypeRef)
        TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );

    void * pUnoReturn = 0;
    void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need

    if (pReturnTypeDescr)
    {
        if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
        {
            pUnoReturn = pRegisterReturn; // direct way for simple types
        }
        else // complex return via ptr (pCppReturn)
        {
            pCppReturn = *(void **)gpreg;
                        gpreg++;
                        ng++;

            pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
                          ? alloca( pReturnTypeDescr->nSize )
                          : pCppReturn); // direct way
        }
    }
    // pop this
        gpreg++;
        ng++;

    // stack space
    static_assert(sizeof(void *) == sizeof(sal_Int32), "### unexpected size!");
    // parameters
    void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
    void ** pCppArgs = pUnoArgs + nParams;
    // indices of values this have to be converted (interface conversion cpp<=>uno)
    sal_Int32 * pTempIndices = (sal_Int32 *)(pUnoArgs + (2 * nParams));
    // type descriptions for reconversions
    typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));

    sal_Int32 nTempIndices   = 0;

    for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
    {
        const typelib_MethodParameter & rParam = pParams[nPos];
        typelib_TypeDescription * pParamTypeDescr = 0;
        TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );

        if (!rParam.bOut && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
                // value
        {

            switch (pParamTypeDescr->eTypeClass)
            {

              case typelib_TypeClass_DOUBLE:
#ifndef __NO_FPRS__
               if (nf < 8) {
                  pCppArgs[nPos] = fpreg;
                  pUnoArgs[nPos] = fpreg;
                  nf++;
                  fpreg += 2;
#else
               if (ng & 1) {
                   ng++;
                   gpreg++;
               }
               if (ng < 8) {
                   pCppArgs[nPos] = gpreg;
                   pUnoArgs[nPos] = gpreg;
                   ng += 2;
                   gpreg += 2;
#endif
               } else {
                if (((long)ovrflw) & 4) ovrflw++;
                pCppArgs[nPos] = ovrflw;
                pUnoArgs[nPos] = ovrflw;
                    ovrflw += 2;
               }
               break;

               case typelib_TypeClass_FLOAT:
                // fpreg are all double values so need to
                // modify fpreg to be a single word float value
#ifndef __NO_FPRS__
                if (nf < 8) {
                   float tmp = (float) (*((double *)fpreg));
                   (*((float *) fpreg)) = tmp;
                   pCppArgs[nPos] = fpreg;
                   pUnoArgs[nPos] = fpreg;
                   nf++;
                   fpreg += 2;
#else
                if (ng < 8) {
                   pCppArgs[nPos] = gpreg;
                   pUnoArgs[nPos] = gpreg;
                   ng++;
                   gpreg++;
#endif
                } else {
#if 0 /* abi is not being followed correctly */
                  if (((long)ovrflw) & 4) ovrflw++;
                  float tmp = (float) (*((double *)ovrflw));
                  (*((float *) ovrflw)) = tmp;
                  pCppArgs[nPos] = ovrflw;
                  pUnoArgs[nPos] = ovrflw;
                  ovrflw += 2;
#else
                              pCppArgs[nPos] = ovrflw;
                  pUnoArgs[nPos] = ovrflw;
                  ovrflw += 1;
#endif
                            }
                break;

            case typelib_TypeClass_HYPER:
            case typelib_TypeClass_UNSIGNED_HYPER:
             if (ng & 1) {
                ng++;
                gpreg++;
             }
             if (ng < 8) {
                pCppArgs[nPos] = gpreg;
                pUnoArgs[nPos] = gpreg;
                ng += 2;
                gpreg += 2;
             } else {
                if (((long)ovrflw) & 4) ovrflw++;
                pCppArgs[nPos] = ovrflw;
                pUnoArgs[nPos] = ovrflw;
                ovrflw += 2;
              }
              break;

            case typelib_TypeClass_BYTE:
            case typelib_TypeClass_BOOLEAN:
             if (ng < 8) {
                  pCppArgs[nPos] = (((char *)gpreg) + 3);
                  pUnoArgs[nPos] = (((char *)gpreg) + 3);
                  ng++;
                  gpreg++;
             } else {
                  pCppArgs[nPos] = (((char *)ovrflw) + 3);
                  pUnoArgs[nPos] = (((char *)ovrflw) + 3);
                  ovrflw++;
             }
             break;


               case typelib_TypeClass_CHAR:
               case typelib_TypeClass_SHORT:
               case typelib_TypeClass_UNSIGNED_SHORT:
            if (ng < 8) {
                  pCppArgs[nPos] = (((char *)gpreg)+ 2);
                  pUnoArgs[nPos] = (((char *)gpreg)+ 2);
                  ng++;
                  gpreg++;
            } else {
                  pCppArgs[nPos] = (((char *)ovrflw) + 2);
                  pUnoArgs[nPos] = (((char *)ovrflw) + 2);
                  ovrflw++;
            }
            break;


              default:
            if (ng < 8) {
                  pCppArgs[nPos] = gpreg;
                  pUnoArgs[nPos] = gpreg;
                  ng++;
                  gpreg++;
            } else {
                  pCppArgs[nPos] = ovrflw;
                  pUnoArgs[nPos] = ovrflw;
                  ovrflw++;
            }
                        break;

                }
                // no longer needed
            TYPELIB_DANGER_RELEASE( pParamTypeDescr );
        }
        else // ptr to complex value | ref
        {

                if (ng < 8) {
                  pCppArgs[nPos] = *(void **)gpreg;
                  pCppStack = gpreg;
                  ng++;
                  gpreg++;
                } else {
                  pCppArgs[nPos] = *(void **)ovrflw;
                  pCppStack = ovrflw;
                 ovrflw++;
                }

            if (! rParam.bIn) // is pure out
            {
                // uno out is unconstructed mem!
                pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
                pTempIndices[nTempIndices] = nPos;
                // will be released at reconversion
                ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr;
            }
            // is in/inout
            else if (bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr ))
            {
                uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
                                        *(void **)pCppStack, pParamTypeDescr,
                                        pThis->getBridge()->getCpp2Uno() );
                pTempIndices[nTempIndices] = nPos; // has to be reconverted
                // will be released at reconversion
                ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr;
            }
            else // direct way
            {
                pUnoArgs[nPos] = *(void **)pCppStack;
                // no longer needed
                TYPELIB_DANGER_RELEASE( pParamTypeDescr );
            }
        }
    }

    // ExceptionHolder
    uno_Any aUnoExc; // Any will be constructed by callee
    uno_Any * pUnoExc = &aUnoExc;

    // invoke uno dispatch call
    (*pThis->getUnoI()->pDispatcher)( pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );

    // in case an exception occurred...
    if (pUnoExc)
    {
        // destruct temporary in/inout params
        for ( ; nTempIndices--; )
        {
            sal_Int32 nIndex = pTempIndices[nTempIndices];

            if (pParams[nIndex].bIn) // is in/inout => was constructed
                uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndices], 0 );
            TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndices] );
        }
        if (pReturnTypeDescr)
            TYPELIB_DANGER_RELEASE( pReturnTypeDescr );

        CPPU_CURRENT_NAMESPACE::raiseException( &aUnoExc, pThis->getBridge()->getUno2Cpp() );
                // has to destruct the any
        // is here for dummy
        return typelib_TypeClass_VOID;
    }
    else // else no exception occurred...
    {
        // temporary params
        for ( ; nTempIndices--; )
        {
            sal_Int32 nIndex = pTempIndices[nTempIndices];
            typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndices];

            if (pParams[nIndex].bOut) // inout/out
            {
                // convert and assign
                uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
                uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
                                        pThis->getBridge()->getUno2Cpp() );
            }
            // destroy temp uno param
            uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );

            TYPELIB_DANGER_RELEASE( pParamTypeDescr );
        }
        // return
        if (pCppReturn) // has complex return
        {
            if (pUnoReturn != pCppReturn) // needs reconversion
            {
                uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
                                        pThis->getBridge()->getUno2Cpp() );
                // destroy temp uno return
                uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
            }
            // complex return ptr is set to return reg
            *(void **)pRegisterReturn = pCppReturn;
        }
        if (pReturnTypeDescr)
        {
            typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
            TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
            return eRet;
        }
        else
            return typelib_TypeClass_VOID;
    }
}


static typelib_TypeClass cpp_mediate(
    sal_Int32 nFunctionIndex,
        sal_Int32 nVtableOffset,
        void ** gpreg, void ** fpreg, void ** ovrflw,
    sal_Int64 * pRegisterReturn /* space for register return */ )
{
    static_assert(sizeof(sal_Int32)==sizeof(void *), "### unexpected!");

    // gpreg:  [ret *], this, [other gpr params]
    // fpreg:  [fpr params]
    // ovrflw: [gpr or fpr params (properly aligned)]

        void * pThis;
        if (nFunctionIndex & 0x80000000 )
    {
        nFunctionIndex &= 0x7fffffff;
        pThis = gpreg[1];
    }
    else
        {
        pThis = gpreg[0];
        }

        pThis = static_cast< char * >(pThis) - nVtableOffset;
        bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
          = bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
            pThis);

    typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();

    if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
    {
        SAL_WARN(
            "bridges",
            "illegal " << OUString::unacquired(&pTypeDescr->aBase.pTypeName)
                << " vtable index " << nFunctionIndex << "/"
                << pTypeDescr->nMapFunctionIndexToMemberIndex);
        throw RuntimeException(
            ("illegal " + OUString::unacquired(&pTypeDescr->aBase.pTypeName)
             + " vtable index " + OUString::number(nFunctionIndex) + "/"
             + OUString::number(pTypeDescr->nMapFunctionIndexToMemberIndex)),
            (XInterface *)pThis);
    }

    // determine called method
    sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
    assert(nMemberPos < pTypeDescr->nAllMembers);

    TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );

    typelib_TypeClass eRet;
    switch (aMemberDescr.get()->eTypeClass)
    {
    case typelib_TypeClass_INTERFACE_ATTRIBUTE:
    {
        if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
        {
            // is GET method
            eRet = cpp2uno_call(
                pCppI, aMemberDescr.get(),
                ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
                0, 0, // no params
                gpreg, fpreg, ovrflw, pRegisterReturn );
        }
        else
        {
            // is SET method
            typelib_MethodParameter aParam;
            aParam.pTypeRef =
                ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
            aParam.bIn      = sal_True;
            aParam.bOut     = sal_False;

            eRet = cpp2uno_call(
                pCppI, aMemberDescr.get(),
                0, // indicates void return
                1, &aParam,
                gpreg, fpreg, ovrflw, pRegisterReturn );
        }
        break;
    }
    case typelib_TypeClass_INTERFACE_METHOD:
    {
        // is METHOD
        switch (nFunctionIndex)
        {
        case 1: // acquire()
            pCppI->acquireProxy(); // non virtual call!
            eRet = typelib_TypeClass_VOID;
            break;
        case 2: // release()
            pCppI->releaseProxy(); // non virtual call!
            eRet = typelib_TypeClass_VOID;
            break;
        case 0: // queryInterface() opt
        {
            typelib_TypeDescription * pTD = 0;
            TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( gpreg[2] )->getTypeLibType() );
            if (pTD)
            {
                XInterface * pInterface = 0;
                (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
                    pCppI->getBridge()->getCppEnv(),
                    (void **)&pInterface, pCppI->getOid().pData,
                    (typelib_InterfaceTypeDescription *)pTD );

                if (pInterface)
                {
                    ::uno_any_construct(
                        reinterpret_cast< uno_Any * >( gpreg[0] ),
                        &pInterface, pTD, cpp_acquire );
                    pInterface->release();
                    TYPELIB_DANGER_RELEASE( pTD );
                    *(void **)pRegisterReturn = gpreg[0];
                    eRet = typelib_TypeClass_ANY;
                    break;
                }
                TYPELIB_DANGER_RELEASE( pTD );
            }
        } // else perform queryInterface()
        default:
            eRet = cpp2uno_call(
                pCppI, aMemberDescr.get(),
                ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
                ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
                ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
                gpreg, fpreg, ovrflw, pRegisterReturn );
        }
        break;
    }
    default:
    {
        throw RuntimeException( "no member description found!", (XInterface *)pThis );
    }
    }

    return eRet;
}

/**
 * is called on incoming vtable calls
 * (called by asm snippets)
 */
static void cpp_vtable_call( int nFunctionIndex, int nVtableOffset, void** gpregptr, void** fpregptr, void** ovrflw)
{
        sal_Int32     gpreg[8];
        memcpy( gpreg, gpregptr, 32);

#ifndef __NO_FPRS__
        double        fpreg[8];
        memcpy( fpreg, fpregptr, 64);
#endif

    volatile long nRegReturn[2];

        // fprintf(stderr,"in cpp_vtable_call nFunctionIndex is %x\n",nFunctionIndex);
        // fprintf(stderr,"in cpp_vtable_call nVtableOffset is %x\n",nVtableOffset);
        // fflush(stderr);

    typelib_TypeClass aType =
             cpp_mediate( nFunctionIndex, nVtableOffset, (void**)gpreg,
#ifndef __NO_FPRS__
                 (void**)fpreg,
#else
                 NULL,
#endif
                 ovrflw, (sal_Int64*)nRegReturn );

    switch( aType )
    {

                // move return value into register space
                // (will be loaded by machine code snippet)

                case typelib_TypeClass_BOOLEAN:
                case typelib_TypeClass_BYTE:
                  __asm__( "lbz 3,%0\n\t" : :
               "m"(nRegReturn[0]) );
                  break;

                case typelib_TypeClass_CHAR:
                case typelib_TypeClass_SHORT:
                case typelib_TypeClass_UNSIGNED_SHORT:
                  __asm__( "lhz 3,%0\n\t" : :
               "m"(nRegReturn[0]) );
                  break;

        case typelib_TypeClass_FLOAT:
#ifndef __NO_FPRS__
                  __asm__( "lfs 1,%0\n\t" : :
                           "m" (*((float*)nRegReturn)) );
 #else
                  __asm__( "lwz 3,%0\n\t" : :
                           "m"(nRegReturn[0]) );
#endif
          break;

        case typelib_TypeClass_DOUBLE:
#ifndef __NO_FPRS__
          __asm__( "lfd 1,%0\n\t" : :
                           "m" (*((double*)nRegReturn)) );
#else
          __asm__( "lwz 3,%0\n\t" : :
                           "m"(nRegReturn[0]) );
          __asm__( "lwz 4,%0\n\t" : :
                           "m"(nRegReturn[1]) );
#endif
          break;

        case typelib_TypeClass_HYPER:
        case typelib_TypeClass_UNSIGNED_HYPER:
          __asm__( "lwz 4,%0\n\t" : :
                           "m"(nRegReturn[1]) );  // fall through

        default:
          __asm__( "lwz 3,%0\n\t" : :
                           "m"(nRegReturn[0]) );
          break;
    }
}


int const codeSnippetSize = 108;

unsigned char *  codeSnippet( unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset,
                              bool simpleRetType)
{

  // fprintf(stderr,"in codeSnippet functionIndex is %x\n", functionIndex);
  // fprintf(stderr,"in codeSnippet vtableOffset is %x\n", vtableOffset);
  // fflush(stderr);

    if (! simpleRetType )
        functionIndex |= 0x80000000;

    unsigned long * p = (unsigned long *) code;

    // static_assert( sizeof (long) == 4 );
    assert((((unsigned long)code) & 0x3) == 0 );  //aligned to 4 otherwise a mistake

    /* generate this code */
    // # so first save gpr 3 to gpr 10 (aligned to 4)
    //  stw r3,-2048(r1)
    //  stw r4,-2044(r1)
    //  stw r5,-2040(r1)
    //  stw r6,-2036(r1)
    //  stw r7,-2032(r1)
    //  stw r8,-2028(r1)
    //  stw r9,-2024(r1)
    //  stw r10,-2020(r1)


    // # next save fpr 1 to fpr 8 (aligned to 8)
    // if dedicated floating point registers are used
    //  stfd    f1,-2016(r1)
    //  stfd    f2,-2008(r1)
    //  stfd    f3,-2000(r1)
    //  stfd    f4,-1992(r1)
    //  stfd    f5,-1984(r1)
    //  stfd    f6,-1976(r1)
    //  stfd    f7,-1968(r1)
    //  stfd    f8,-1960(r1)

    // # now here is where cpp_vtable_call must go
    //  lis r3,-8531
    //  ori r3,r3,48879
    //  mtctr   r3

    // # now load up the functionIndex
    //  lis r3,-8531
    //  ori r3,r3,48879

    // # now load up the vtableOffset
    //  lis r4,-8531
    //  ori r4,r4,48879

    // #now load up the pointer to the saved gpr registers
    //  addi    r5,r1,-2048

    // #now load up the pointer to the saved fpr registers
    //  addi    r6,r1,-2016
    // if no dedicated floating point registers are used then we have NULL
    // pointer there
    //  li      r6, 0

    // #now load up the pointer to the overflow call stack
    //  addi    r7,r1,8
    //  bctr

      * p++ = 0x9061f800;
      * p++ = 0x9081f804;
      * p++ = 0x90a1f808;
      * p++ = 0x90c1f80c;
      * p++ = 0x90e1f810;
      * p++ = 0x9101f814;
      * p++ = 0x9121f818;
      * p++ = 0x9141f81c;
#ifndef __NO_FPRS__
      * p++ = 0xd821f820;
      * p++ = 0xd841f828;
      * p++ = 0xd861f830;
      * p++ = 0xd881f838;
      * p++ = 0xd8a1f840;
      * p++ = 0xd8c1f848;
      * p++ = 0xd8e1f850;
      * p++ = 0xd901f858;
#else
      /* these nops could be replaced with a smaller codeSnippetSize - 8 * 4 */
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
      * p++ = 0x60000000;
#endif
      * p++ = 0x3c600000 | (((unsigned long)cpp_vtable_call) >> 16);
      * p++ = 0x60630000 | (((unsigned long)cpp_vtable_call) & 0x0000FFFF);
      * p++ = 0x7c6903a6;
      * p++ = 0x3c600000 | (((unsigned long)functionIndex) >> 16);
      * p++ = 0x60630000 | (((unsigned long)functionIndex) & 0x0000FFFF);
      * p++ = 0x3c800000 | (((unsigned long)vtableOffset) >> 16);
      * p++ = 0x60840000 | (((unsigned long)vtableOffset) & 0x0000FFFF);
      * p++ = 0x38a1f800;
#ifndef __NO_FPRS__
      * p++ = 0x38c1f820;
#else
      * p++ = 0x38c00000;
#endif
      * p++ = 0x38e10008;
      * p++ = 0x4e800420;
      return (code + codeSnippetSize);

}


}

void bridges::cpp_uno::shared::VtableFactory::flushCode(unsigned char const * bptr, unsigned char const * eptr)
{
    int const lineSize = 32;
    for (unsigned char const * p = bptr; p < eptr + lineSize; p += lineSize) {
        __asm__ volatile ("dcbst 0, %0" : : "r"(p) : "memory");
    }
    __asm__ volatile ("sync" : : : "memory");
    for (unsigned char const * p = bptr; p < eptr + lineSize; p += lineSize) {
        __asm__ volatile ("icbi 0, %0" : : "r"(p) : "memory");
    }
    __asm__ volatile ("isync" : : : "memory");
}

struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };

bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
{
    return static_cast< Slot * >(block) + 2;
}

std::size_t bridges::cpp_uno::shared::VtableFactory::getBlockSize(
    sal_Int32 slotCount)
{
    return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
}

bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::initializeBlock(
    void * block, sal_Int32 slotCount, sal_Int32,
    typelib_InterfaceTypeDescription *)
{
    Slot * slots = mapBlockToVtable(block);
    slots[-2].fn = 0;
    slots[-1].fn = 0;
    return slots + slotCount;
}

unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
    Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff,
    typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
    sal_Int32 functionCount, sal_Int32 vtableOffset)
{
     (*slots) -= functionCount;
     Slot * s = *slots;
  // fprintf(stderr, "in addLocalFunctions functionOffset is %x\n",functionOffset);
  // fprintf(stderr, "in addLocalFunctions vtableOffset is %x\n",vtableOffset);
  // fflush(stderr);

    for (sal_Int32 i = 0; i < type->nMembers; ++i) {
        typelib_TypeDescription * member = 0;
        TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
        assert(member != 0);
        switch (member->eTypeClass) {
        case typelib_TypeClass_INTERFACE_ATTRIBUTE:
            // Getter:
            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet(
                code, functionOffset++, vtableOffset,
                bridges::cpp_uno::shared::isSimpleType(
                    reinterpret_cast<
                    typelib_InterfaceAttributeTypeDescription * >(
                        member)->pAttributeTypeRef));

            // Setter:
            if (!reinterpret_cast<
                typelib_InterfaceAttributeTypeDescription * >(
                    member)->bReadOnly)
            {
                (s++)->fn = code + writetoexecdiff;
                code = codeSnippet(code, functionOffset++, vtableOffset, true);
            }
            break;

        case typelib_TypeClass_INTERFACE_METHOD:
            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet(
                code, functionOffset++, vtableOffset,
                bridges::cpp_uno::shared::isSimpleType(
                    reinterpret_cast<
                    typelib_InterfaceMethodTypeDescription * >(
                        member)->pReturnTypeRef));
            break;

        default:
            assert(false);
            break;
        }
        TYPELIB_DANGER_RELEASE(member);
    }
    return code;
}

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