1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
/* -*- 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;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */