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
/* -*- 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 <stdio.h>
#include <stdlib.h>

#include <rtl/alloc.h>
#include <sal/log.hxx>

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

#include <bridge.hxx>
#include <cppinterfaceproxy.hxx>
#include <types.hxx>
#include <vtablefactory.hxx>

#include "abi.hxx"
#include "call.hxx"
#include "share.hxx"

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


// Perform the UNO call
//
// We must convert the parameters stored in gpreg, fpreg and ovrflw to UNO
// arguments and call pThis->getUnoI()->pDispatcher.
//
// gpreg:  [ret *], this, [gpr params]
// fpreg:  [fpr params]
// ovrflw: [gpr or fpr params (properly aligned)]
//
// [ret *] is present when we are returning a structure bigger than 16 bytes
// Simple types are returned in rax, rdx (int), or xmm0, xmm1 (fp).
// Similarly structures <= 16 bytes are in rax, rdx, xmm0, xmm1 as necessary.
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_uInt64 * pRegisterReturn /* space for register return */ )
{
    unsigned int nr_gpr = 0; //number of gpr registers used
    unsigned int nr_fpr = 0; //number of fpr registers used

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

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

    if ( pReturnTypeDescr )
    {
        if ( x86_64::return_in_hidden_param( pReturnTypeRef ) )
        {
            pCppReturn = *gpreg++;
            nr_gpr++;

            pUnoReturn = ( bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
                           ? alloca( pReturnTypeDescr->nSize )
                           : pCppReturn ); // direct way
        }
        else
            pUnoReturn = pRegisterReturn; // direct way for simple types
    }

    // pop this
    gpreg++;
    nr_gpr++;

    // stack space
    // parameters
    void ** pUnoArgs = static_cast<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 = reinterpret_cast<sal_Int32 *>(pUnoArgs + (2 * nParams));
    // type descriptions for reconversions
    typelib_TypeDescription ** ppTempParamTypeDescr = reinterpret_cast<typelib_TypeDescription **>(pUnoArgs + (3 * nParams));

    sal_Int32 nTempIndices = 0;

    for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
    {
        const typelib_MethodParameter & rParam = pParams[nPos];

        int nUsedGPR = 0;
        int nUsedSSE = 0;
#ifndef NDEBUG
        bool bFitsRegisters =
#endif
            x86_64::examine_argument( rParam.pTypeRef, false, nUsedGPR, nUsedSSE );
        if ( !rParam.bOut && bridges::cpp_uno::shared::isSimpleType( rParam.pTypeRef ) ) // value
        {
            // Simple types must fit exactly one register on x86_64
            assert(bFitsRegisters && ( ( nUsedSSE == 1 && nUsedGPR == 0 ) || ( nUsedSSE == 0 && nUsedGPR == 1 ) ));

            if ( nUsedSSE == 1 )
            {
                if ( nr_fpr < x86_64::MAX_SSE_REGS )
                {
                    pCppArgs[nPos] = pUnoArgs[nPos] = fpreg++;
                    nr_fpr++;
                }
                else
                    pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw++;
            }
            else if ( nUsedGPR == 1 )
            {
                if ( nr_gpr < x86_64::MAX_GPR_REGS )
                {
                    pCppArgs[nPos] = pUnoArgs[nPos] = gpreg++;
                    nr_gpr++;
                }
                else
                    pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw++;
            }
        }
        else // struct <= 16 bytes || ptr to complex value || ref
        {
            typelib_TypeDescription * pParamTypeDescr = nullptr;
            TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );

            void *pCppStack;
            if ( nr_gpr < x86_64::MAX_GPR_REGS )
            {
                pCppArgs[nPos] = pCppStack = *gpreg++;
                nr_gpr++;
            }
            else
                pCppArgs[nPos] = pCppStack = *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;
            }
            else if ( bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr ) ) // is in/inout
            {
                uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
                                        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] = 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], nullptr );
            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, nullptr );

            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, nullptr );
            }
            // complex return ptr is set to return reg
            *reinterpret_cast<void **>(pRegisterReturn) = pCppReturn;
        }
        if ( pReturnTypeDescr )
        {
            typelib_TypeClass eRet = pReturnTypeDescr->eTypeClass;
            TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
            return eRet;
        }
        else
            return typelib_TypeClass_VOID;
    }
}

typelib_TypeClass cpp_vtable_call(
    sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
    void ** gpreg, void ** fpreg, void ** ovrflw,
    sal_uInt64 * pRegisterReturn /* space for register return */ )
{
    // 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)),
            reinterpret_cast<XInterface *>( pCppI ) );
    }

    // 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:
        {
            typelib_TypeDescriptionReference *pAttrTypeRef =
                reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>( aMemberDescr.get() )->pAttributeTypeRef;

            if ( pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex )
            {
                // is GET method
                eRet = cpp2uno_call( pCppI, aMemberDescr.get(), pAttrTypeRef,
                        0, nullptr, // no params
                        gpreg, fpreg, ovrflw, pRegisterReturn );
            }
            else
            {
                // is SET method
                typelib_MethodParameter aParam;
                aParam.pTypeRef = pAttrTypeRef;
                aParam.bIn      = true;
                aParam.bOut     = false;

                eRet = cpp2uno_call( pCppI, aMemberDescr.get(),
                        nullptr, // 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 = nullptr;
                    TYPELIB_DANGER_GET( &pTD, static_cast<Type *>( gpreg[2] )->getTypeLibType() );
                    if ( pTD )
                    {
                        XInterface * pInterface = nullptr;
                        (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)
                            ( pCppI->getBridge()->getCppEnv(),
                              reinterpret_cast<void **>(&pInterface),
                              pCppI->getOid().pData,
                              reinterpret_cast<typelib_InterfaceTypeDescription *>( pTD ) );

                        if ( pInterface )
                        {
                            ::uno_any_construct( static_cast<uno_Any *>( gpreg[0] ),
                                                 &pInterface, pTD, cpp_acquire );

                            pInterface->release();
                            TYPELIB_DANGER_RELEASE( pTD );

                            reinterpret_cast<void **>( pRegisterReturn )[0] = gpreg[0];
                            eRet = typelib_TypeClass_ANY;
                            break;
                        }
                        TYPELIB_DANGER_RELEASE( pTD );
                    }
                    SAL_FALLTHROUGH; // else perform queryInterface()
                }
                default:
                {
                    typelib_InterfaceMethodTypeDescription *pMethodTD =
                        reinterpret_cast<typelib_InterfaceMethodTypeDescription *>( aMemberDescr.get() );

                    eRet = cpp2uno_call( pCppI, aMemberDescr.get(),
                                         pMethodTD->pReturnTypeRef,
                                         pMethodTD->nParams,
                                         pMethodTD->pParams,
                                         gpreg, fpreg, ovrflw, pRegisterReturn );
                }
            }
            break;
        }
        default:
        {
            throw RuntimeException("no member description found!",
                                    reinterpret_cast<XInterface *>( pCppI ) );
        }
    }

    return eRet;
}

const int codeSnippetSize = 24;

// Generate a trampoline that redirects method calls to
// privateSnippetExecutor().
//
// privateSnippetExecutor() saves all the registers that are used for
// parameter passing on x86_64, and calls the cpp_vtable_call().
// When it returns, privateSnippetExecutor() sets the return value.
//
// Note: The code snippet we build here must not create a stack frame,
// otherwise the UNO exceptions stop working thanks to non-existing
// unwinding info.
static unsigned char * codeSnippet( unsigned char * code,
        sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
        bool bHasHiddenParam )
{
    sal_uInt64 nOffsetAndIndex = ( static_cast<sal_uInt64>(nVtableOffset) << 32 ) | static_cast<sal_uInt64>(nFunctionIndex);

    if ( bHasHiddenParam )
        nOffsetAndIndex |= 0x80000000;

    // movq $<nOffsetAndIndex>, %r10
    *reinterpret_cast<sal_uInt16 *>( code ) = 0xba49;
    *reinterpret_cast<sal_uInt16 *>( code + 2 ) = nOffsetAndIndex & 0xFFFF;
    *reinterpret_cast<sal_uInt32 *>( code + 4 ) = nOffsetAndIndex >> 16;
    *reinterpret_cast<sal_uInt16 *>( code + 8 ) = nOffsetAndIndex >> 48;

    // movq $<address of the privateSnippetExecutor>, %r11
    *reinterpret_cast<sal_uInt16 *>( code + 10 ) = 0xbb49;
    *reinterpret_cast<sal_uInt32 *>( code + 12 )
        = reinterpret_cast<sal_uInt64>(privateSnippetExecutor);
    *reinterpret_cast<sal_uInt32 *>( code + 16 )
        = reinterpret_cast<sal_uInt64>(privateSnippetExecutor) >> 32;

    // jmpq *%r11
    *reinterpret_cast<sal_uInt32 *>( code + 20 ) = 0x00e3ff49;

#if OSL_DEBUG_LEVEL > 1
    fprintf(stderr,
            "==> codeSnippet, functionIndex=%d%s, vtableOffset=%d\n",
            nFunctionIndex, (bHasHiddenParam ? "|0x80000000":""), nVtableOffset);
#endif

    return code + codeSnippetSize;
}

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 = nullptr;
    slots[-1].fn = nullptr;
    return slots + slotCount;
}


unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
    Slot ** slots, unsigned char * code,
    typelib_InterfaceTypeDescription const * type, sal_Int32 nFunctionOffset,
    sal_Int32 functionCount, sal_Int32 nVtableOffset )
{
    const sal_PtrDiff writetoexecdiff = 0;
    (*slots) -= functionCount;
    Slot * s = *slots;
    for ( sal_Int32 nPos = 0; nPos < type->nMembers; ++nPos )
    {
        typelib_TypeDescription * pTD = nullptr;

        TYPELIB_DANGER_GET( &pTD, type->ppMembers[ nPos ] );
        assert(pTD);

        if ( typelib_TypeClass_INTERFACE_ATTRIBUTE == pTD->eTypeClass )
        {
            typelib_InterfaceAttributeTypeDescription *pAttrTD =
                reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>( pTD );

            // get method
            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet( code, nFunctionOffset++, nVtableOffset,
                                x86_64::return_in_hidden_param( pAttrTD->pAttributeTypeRef ) );

            if ( ! pAttrTD->bReadOnly )
            {
                // set method
                (s++)->fn = code + writetoexecdiff;
                code = codeSnippet( code, nFunctionOffset++, nVtableOffset, false );
            }
        }
        else if ( typelib_TypeClass_INTERFACE_METHOD == pTD->eTypeClass )
        {
            typelib_InterfaceMethodTypeDescription *pMethodTD =
                reinterpret_cast<typelib_InterfaceMethodTypeDescription *>( pTD );

            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet( code, nFunctionOffset++, nVtableOffset,
                                x86_64::return_in_hidden_param( pMethodTD->pReturnTypeRef ) );
        }
        else
            assert(false);

        TYPELIB_DANGER_RELEASE( pTD );
    }
    return code;
}

void bridges::cpp_uno::shared::VtableFactory::flushCode(
    SAL_UNUSED_PARAMETER unsigned char const *,
    SAL_UNUSED_PARAMETER unsigned char const * )
{}

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