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5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
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13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
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20  *************************************************************/
21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_bridges.hxx"
26 
27 #include <string.h>
28 
29 #include <com/sun/star/uno/genfunc.hxx>
30 #include <uno/data.h>
31 #include <typelib/typedescription.hxx>
32 
33 #include "bridges/cpp_uno/shared/bridge.hxx"
34 #include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
35 #include "bridges/cpp_uno/shared/types.hxx"
36 #include "bridges/cpp_uno/shared/vtablefactory.hxx"
37 
38 #include "share.hxx"
39 // #include <stdio.h>
40 
41 
42 using namespace ::com::sun::star::uno;
43 
44 namespace
45 {
46 
47 //==================================================================================================
48 static typelib_TypeClass cpp2uno_call(
49 	bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
50 	const typelib_TypeDescription * pMemberTypeDescr,
51 	typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
52 	sal_Int32 nParams, typelib_MethodParameter * pParams,
53         void ** gpreg, void ** fpreg, void ** ovrflw,
54 	sal_Int64 * pRegisterReturn /* space for register return */ )
55 {
56         int ng = 0; //number of gpr registers used
57 #ifndef __NO_FPRS__
58         int nf = 0; //number of fpr regsiters used
59 #endif
60         void ** pCppStack; //temporary stack pointer
61 
62         // gpreg:  [ret *], this, [gpr params]
63         // fpreg:  [fpr params]
64         // ovrflw: [gpr or fpr params (properly aligned)]
65 
66 	// return
67 	typelib_TypeDescription * pReturnTypeDescr = 0;
68 	if (pReturnTypeRef)
69 		TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
70 
71 	void * pUnoReturn = 0;
72 	void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
73 
74 	if (pReturnTypeDescr)
75 	{
76 		if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
77 		{
78 			pUnoReturn = pRegisterReturn; // direct way for simple types
79 		}
80 		else // complex return via ptr (pCppReturn)
81 		{
82 			pCppReturn = *(void **)gpreg;
83                         gpreg++;
84                         ng++;
85 
86 			pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
87 						  ? alloca( pReturnTypeDescr->nSize )
88 						  : pCppReturn); // direct way
89 		}
90 	}
91 	// pop this
92         gpreg++;
93         ng++;
94 
95 	// stack space
96 	OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
97 	// parameters
98 	void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
99 	void ** pCppArgs = pUnoArgs + nParams;
100 	// indizes of values this have to be converted (interface conversion cpp<=>uno)
101 	sal_Int32 * pTempIndizes = (sal_Int32 *)(pUnoArgs + (2 * nParams));
102 	// type descriptions for reconversions
103 	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
104 
105 	sal_Int32 nTempIndizes   = 0;
106 
107 	for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
108 	{
109 		const typelib_MethodParameter & rParam = pParams[nPos];
110 		typelib_TypeDescription * pParamTypeDescr = 0;
111 		TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
112 
113 		if (!rParam.bOut && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
114                 // value
115 		{
116 
117 			switch (pParamTypeDescr->eTypeClass)
118 			{
119 
120 			  case typelib_TypeClass_DOUBLE:
121 #ifndef __NO_FPRS__
122 			   if (nf < 8) {
123 			      pCppArgs[nPos] = fpreg;
124 			      pUnoArgs[nPos] = fpreg;
125 			      nf++;
126 			      fpreg += 2;
127 #else
128                if (ng & 1) {
129                    ng++;
130                    gpreg++;
131                }
132                if (ng < 8) {
133                    pCppArgs[nPos] = gpreg;
134                    pUnoArgs[nPos] = gpreg;
135                    ng += 2;
136                    gpreg += 2;
137 #endif
138 			   } else {
139 				if (((long)ovrflw) & 4) ovrflw++;
140 				pCppArgs[nPos] = ovrflw;
141 				pUnoArgs[nPos] = ovrflw;
142 			        ovrflw += 2;
143 			   }
144 			   break;
145 
146 			   case typelib_TypeClass_FLOAT:
147 			    // fpreg are all double values so need to
148 			    // modify fpreg to be a single word float value
149 #ifndef __NO_FPRS__
150 			    if (nf < 8) {
151 			       float tmp = (float) (*((double *)fpreg));
152 			       (*((float *) fpreg)) = tmp;
153 			       pCppArgs[nPos] = fpreg;
154 			       pUnoArgs[nPos] = fpreg;
155 			       nf++;
156 			       fpreg += 2;
157 #else
158                 if (ng < 8) {
159                    pCppArgs[nPos] = gpreg;
160                    pUnoArgs[nPos] = gpreg;
161                    ng++;
162                    gpreg++;
163 #endif
164 			    } else {
165 #if 0 /* abi is not being followed correctly */
166 			      if (((long)ovrflw) & 4) ovrflw++;
167 			      float tmp = (float) (*((double *)ovrflw));
168 			      (*((float *) ovrflw)) = tmp;
169 			      pCppArgs[nPos] = ovrflw;
170 			      pUnoArgs[nPos] = ovrflw;
171 			      ovrflw += 2;
172 #else
173                               pCppArgs[nPos] = ovrflw;
174 			      pUnoArgs[nPos] = ovrflw;
175 			      ovrflw += 1;
176 #endif
177                             }
178 			    break;
179 
180 			case typelib_TypeClass_HYPER:
181 			case typelib_TypeClass_UNSIGNED_HYPER:
182 			 if (ng & 1) {
183 			    ng++;
184 			    gpreg++;
185 			 }
186 			 if (ng < 8) {
187 			    pCppArgs[nPos] = gpreg;
188 			    pUnoArgs[nPos] = gpreg;
189 			    ng += 2;
190 			    gpreg += 2;
191 			 } else {
192 			    if (((long)ovrflw) & 4) ovrflw++;
193 			    pCppArgs[nPos] = ovrflw;
194 			    pUnoArgs[nPos] = ovrflw;
195 			    ovrflw += 2;
196 			  }
197 			  break;
198 
199 			case typelib_TypeClass_BYTE:
200 			case typelib_TypeClass_BOOLEAN:
201 			 if (ng < 8) {
202 			      pCppArgs[nPos] = (((char *)gpreg) + 3);
203 			      pUnoArgs[nPos] = (((char *)gpreg) + 3);
204 			      ng++;
205 			      gpreg++;
206 			 } else {
207 			      pCppArgs[nPos] = (((char *)ovrflw) + 3);
208 			      pUnoArgs[nPos] = (((char *)ovrflw) + 3);
209 			      ovrflw++;
210 			 }
211 			 break;
212 
213 
214 		       case typelib_TypeClass_CHAR:
215 		       case typelib_TypeClass_SHORT:
216 		       case typelib_TypeClass_UNSIGNED_SHORT:
217 			if (ng < 8) {
218 			      pCppArgs[nPos] = (((char *)gpreg)+ 2);
219 			      pUnoArgs[nPos] = (((char *)gpreg)+ 2);
220 			      ng++;
221 			      gpreg++;
222 			} else {
223 			      pCppArgs[nPos] = (((char *)ovrflw) + 2);
224 			      pUnoArgs[nPos] = (((char *)ovrflw) + 2);
225 			      ovrflw++;
226 			}
227 			break;
228 
229 
230 		      default:
231 			if (ng < 8) {
232 			      pCppArgs[nPos] = gpreg;
233 			      pUnoArgs[nPos] = gpreg;
234 			      ng++;
235 			      gpreg++;
236 			} else {
237 			      pCppArgs[nPos] = ovrflw;
238 			      pUnoArgs[nPos] = ovrflw;
239 			      ovrflw++;
240 			}
241                         break;
242 
243 		        }
244 		        // no longer needed
245 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
246 		}
247 		else // ptr to complex value | ref
248 		{
249 
250 		        if (ng < 8) {
251 		          pCppArgs[nPos] = *(void **)gpreg;
252 		          pCppStack = gpreg;
253 		          ng++;
254 		          gpreg++;
255 		        } else {
256 		          pCppArgs[nPos] = *(void **)ovrflw;
257 		          pCppStack = ovrflw;
258 		         ovrflw++;
259 		        }
260 
261 			if (! rParam.bIn) // is pure out
262 			{
263 				// uno out is unconstructed mem!
264 				pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
265 				pTempIndizes[nTempIndizes] = nPos;
266 				// will be released at reconversion
267 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
268 			}
269 			// is in/inout
270 			else if (bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr ))
271 			{
272 				uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
273 										*(void **)pCppStack, pParamTypeDescr,
274 										pThis->getBridge()->getCpp2Uno() );
275 				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
276 				// will be released at reconversion
277 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
278 			}
279 			else // direct way
280 			{
281 				pUnoArgs[nPos] = *(void **)pCppStack;
282 				// no longer needed
283 				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
284 			}
285 		}
286 	}
287 
288 	// ExceptionHolder
289 	uno_Any aUnoExc; // Any will be constructed by callee
290 	uno_Any * pUnoExc = &aUnoExc;
291 
292 	// invoke uno dispatch call
293 	(*pThis->getUnoI()->pDispatcher)( pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
294 
295 	// in case an exception occured...
296 	if (pUnoExc)
297 	{
298 		// destruct temporary in/inout params
299 		for ( ; nTempIndizes--; )
300 		{
301 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
302 
303 			if (pParams[nIndex].bIn) // is in/inout => was constructed
304 				uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], 0 );
305 			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
306 		}
307 		if (pReturnTypeDescr)
308 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
309 
310 		CPPU_CURRENT_NAMESPACE::raiseException( &aUnoExc, pThis->getBridge()->getUno2Cpp() );
311                 // has to destruct the any
312 		// is here for dummy
313 		return typelib_TypeClass_VOID;
314 	}
315 	else // else no exception occured...
316 	{
317 		// temporary params
318 		for ( ; nTempIndizes--; )
319 		{
320 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
321 			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
322 
323 			if (pParams[nIndex].bOut) // inout/out
324 			{
325 				// convert and assign
326 				uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
327 				uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
328 										pThis->getBridge()->getUno2Cpp() );
329 			}
330 			// destroy temp uno param
331 			uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
332 
333 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
334 		}
335 		// return
336 		if (pCppReturn) // has complex return
337 		{
338 			if (pUnoReturn != pCppReturn) // needs reconversion
339 			{
340 				uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
341 										pThis->getBridge()->getUno2Cpp() );
342 				// destroy temp uno return
343 				uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
344 			}
345 			// complex return ptr is set to return reg
346 			*(void **)pRegisterReturn = pCppReturn;
347 		}
348 		if (pReturnTypeDescr)
349 		{
350 			typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
351 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
352 			return eRet;
353 		}
354 		else
355 			return typelib_TypeClass_VOID;
356 	}
357 }
358 
359 
360 //==================================================================================================
361 static typelib_TypeClass cpp_mediate(
362 	sal_Int32 nFunctionIndex,
363         sal_Int32 nVtableOffset,
364         void ** gpreg, void ** fpreg, void ** ovrflw,
365 	sal_Int64 * pRegisterReturn /* space for register return */ )
366 {
367 	OSL_ENSURE( sizeof(sal_Int32)==sizeof(void *), "### unexpected!" );
368 
369 	// gpreg:  [ret *], this, [other gpr params]
370 	// fpreg:  [fpr params]
371 	// ovrflw: [gpr or fpr params (properly aligned)]
372 
373         void * pThis;
374         if (nFunctionIndex & 0x80000000 )
375 	{
376 		nFunctionIndex &= 0x7fffffff;
377 		pThis = gpreg[1];
378 	}
379 	else
380         {
381 		pThis = gpreg[0];
382         }
383 
384         pThis = static_cast< char * >(pThis) - nVtableOffset;
385         bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
386 		  = bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
387 			pThis);
388 
389 	typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
390 
391 	OSL_ENSURE( nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" );
392 	if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
393 	{
394 		throw RuntimeException(
395             rtl::OUString::createFromAscii("illegal vtable index!"),
396             (XInterface *)pThis );
397 	}
398 
399 	// determine called method
400 	sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
401 	OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### illegal member index!" );
402 
403 	TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
404 
405 	typelib_TypeClass eRet;
406 	switch (aMemberDescr.get()->eTypeClass)
407 	{
408 	case typelib_TypeClass_INTERFACE_ATTRIBUTE:
409 	{
410 		if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
411 		{
412 			// is GET method
413 			eRet = cpp2uno_call(
414 				pCppI, aMemberDescr.get(),
415 				((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
416 				0, 0, // no params
417 				gpreg, fpreg, ovrflw, pRegisterReturn );
418 		}
419 		else
420 		{
421 			// is SET method
422 			typelib_MethodParameter aParam;
423 			aParam.pTypeRef =
424 				((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
425 			aParam.bIn		= sal_True;
426 			aParam.bOut		= sal_False;
427 
428 			eRet = cpp2uno_call(
429 				pCppI, aMemberDescr.get(),
430 				0, // indicates void return
431 				1, &aParam,
432 				gpreg, fpreg, ovrflw, pRegisterReturn );
433 		}
434 		break;
435 	}
436 	case typelib_TypeClass_INTERFACE_METHOD:
437 	{
438 		// is METHOD
439 		switch (nFunctionIndex)
440 		{
441 		case 1: // acquire()
442 			pCppI->acquireProxy(); // non virtual call!
443 			eRet = typelib_TypeClass_VOID;
444 			break;
445 		case 2: // release()
446 			pCppI->releaseProxy(); // non virtual call!
447 			eRet = typelib_TypeClass_VOID;
448 			break;
449 		case 0: // queryInterface() opt
450 		{
451 			typelib_TypeDescription * pTD = 0;
452 			TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( gpreg[2] )->getTypeLibType() );
453 			if (pTD)
454 			{
455                 XInterface * pInterface = 0;
456                 (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
457                     pCppI->getBridge()->getCppEnv(),
458                     (void **)&pInterface, pCppI->getOid().pData,
459                     (typelib_InterfaceTypeDescription *)pTD );
460 
461                 if (pInterface)
462                 {
463                     ::uno_any_construct(
464                         reinterpret_cast< uno_Any * >( gpreg[0] ),
465                         &pInterface, pTD, cpp_acquire );
466                     pInterface->release();
467                     TYPELIB_DANGER_RELEASE( pTD );
468                     *(void **)pRegisterReturn = gpreg[0];
469                     eRet = typelib_TypeClass_ANY;
470                     break;
471                 }
472                 TYPELIB_DANGER_RELEASE( pTD );
473 			}
474 		} // else perform queryInterface()
475 		default:
476 			eRet = cpp2uno_call(
477 				pCppI, aMemberDescr.get(),
478 				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
479 				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
480 				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
481 				gpreg, fpreg, ovrflw, pRegisterReturn );
482 		}
483 		break;
484 	}
485 	default:
486 	{
487 		throw RuntimeException(
488             rtl::OUString::createFromAscii("no member description found!"),
489             (XInterface *)pThis );
490 		// is here for dummy
491 		eRet = typelib_TypeClass_VOID;
492 	}
493 	}
494 
495 	return eRet;
496 }
497 
498 //==================================================================================================
499 /**
500  * is called on incoming vtable calls
501  * (called by asm snippets)
502  */
503 static void cpp_vtable_call( int nFunctionIndex, int nVtableOffset, void** gpregptr, void** fpregptr, void** ovrflw)
504 {
505         sal_Int32     gpreg[8];
506         memcpy( gpreg, gpregptr, 32);
507 
508 #ifndef __NO_FPRS__
509         double        fpreg[8];
510         memcpy( fpreg, fpregptr, 64);
511 #endif
512 
513 	volatile long nRegReturn[2];
514 
515         // fprintf(stderr,"in cpp_vtable_call nFunctionIndex is %x\n",nFunctionIndex);
516         // fprintf(stderr,"in cpp_vtable_call nVtableOffset is %x\n",nVtableOffset);
517         // fflush(stderr);
518 
519 	typelib_TypeClass aType =
520              cpp_mediate( nFunctionIndex, nVtableOffset, (void**)gpreg,
521 #ifndef __NO_FPRS__
522                  (void**)fpreg,
523 #else
524                  NULL,
525 #endif
526                  ovrflw, (sal_Int64*)nRegReturn );
527 
528 	switch( aType )
529 	{
530 
531                 // move return value into register space
532                 // (will be loaded by machine code snippet)
533 
534                 case typelib_TypeClass_BOOLEAN:
535                 case typelib_TypeClass_BYTE:
536                   __asm__( "lbz 3,%0\n\t" : :
537 			   "m"(nRegReturn[0]) );
538                   break;
539 
540                 case typelib_TypeClass_CHAR:
541                 case typelib_TypeClass_SHORT:
542                 case typelib_TypeClass_UNSIGNED_SHORT:
543                   __asm__( "lhz 3,%0\n\t" : :
544 			   "m"(nRegReturn[0]) );
545                   break;
546 
547 		case typelib_TypeClass_FLOAT:
548 #ifndef __NO_FPRS__
549                   __asm__( "lfs 1,%0\n\t" : :
550                            "m" (*((float*)nRegReturn)) );
551  #else
552                   __asm__( "lwz 3,%0\n\t" : :
553                            "m"(nRegReturn[0]) );
554 #endif
555 		  break;
556 
557 		case typelib_TypeClass_DOUBLE:
558 #ifndef __NO_FPRS__
559 		  __asm__( "lfd 1,%0\n\t" : :
560                            "m" (*((double*)nRegReturn)) );
561 #else
562           __asm__( "lwz 3,%0\n\t" : :
563                            "m"(nRegReturn[0]) );
564           __asm__( "lwz 4,%0\n\t" : :
565                            "m"(nRegReturn[1]) );
566 #endif
567 		  break;
568 
569 		case typelib_TypeClass_HYPER:
570 		case typelib_TypeClass_UNSIGNED_HYPER:
571 		  __asm__( "lwz 4,%0\n\t" : :
572                            "m"(nRegReturn[1]) );  // fall through
573 
574 		default:
575 		  __asm__( "lwz 3,%0\n\t" : :
576                            "m"(nRegReturn[0]) );
577 		  break;
578 	}
579 }
580 
581 
582 int const codeSnippetSize = 108;
583 
584 unsigned char *  codeSnippet( unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset,
585                               bool simpleRetType)
586 {
587 
588   // fprintf(stderr,"in codeSnippet functionIndex is %x\n", functionIndex);
589   // fprintf(stderr,"in codeSnippet vtableOffset is %x\n", vtableOffset);
590   // fflush(stderr);
591 
592     if (! simpleRetType )
593         functionIndex |= 0x80000000;
594 
595     unsigned long * p = (unsigned long *) code;
596 
597     // OSL_ASSERT( sizeof (long) == 4 );
598     OSL_ASSERT((((unsigned long)code) & 0x3) == 0 );  //aligned to 4 otherwise a mistake
599 
600     /* generate this code */
601     // # so first save gpr 3 to gpr 10 (aligned to 4)
602     //	stw	r3,-2048(r1)
603     //	stw	r4,-2044(r1)
604     //	stw	r5,-2040(r1)
605     //	stw	r6,-2036(r1)
606     //	stw	r7,-2032(r1)
607     //	stw	r8,-2028(r1)
608     //	stw	r9,-2024(r1)
609     //	stw	r10,-2020(r1)
610 
611 
612     // # next save fpr 1 to fpr 8 (aligned to 8)
613     // if dedicated floating point registers are used
614     //	stfd	f1,-2016(r1)
615     //	stfd	f2,-2008(r1)
616     //	stfd	f3,-2000(r1)
617     //	stfd	f4,-1992(r1)
618     //	stfd	f5,-1984(r1)
619     //	stfd	f6,-1976(r1)
620     //	stfd	f7,-1968(r1)
621     //	stfd	f8,-1960(r1)
622 
623     // # now here is where cpp_vtable_call must go
624     //	lis	r3,-8531
625     //	ori	r3,r3,48879
626     //	mtctr	r3
627 
628     // # now load up the functionIndex
629     //	lis	r3,-8531
630     //	ori	r3,r3,48879
631 
632     // # now load up the vtableOffset
633     //	lis	r4,-8531
634     //	ori	r4,r4,48879
635 
636     // #now load up the pointer to the saved gpr registers
637     //	addi	r5,r1,-2048
638 
639     // #now load up the pointer to the saved fpr registers
640     //	addi	r6,r1,-2016
641     // if no dedicated floating point registers are used than we have NULL
642     // pointer there
643     //  li      r6, 0
644     //
645 
646     // #now load up the pointer to the overflow call stack
647     //	addi	r7,r1,8
648     //	bctr
649 
650       * p++ = 0x9061f800;
651       * p++ = 0x9081f804;
652       * p++ = 0x90a1f808;
653       * p++ = 0x90c1f80c;
654       * p++ = 0x90e1f810;
655       * p++ = 0x9101f814;
656       * p++ = 0x9121f818;
657       * p++ = 0x9141f81c;
658 #ifndef __NO_FPRS__
659       * p++ = 0xd821f820;
660       * p++ = 0xd841f828;
661       * p++ = 0xd861f830;
662       * p++ = 0xd881f838;
663       * p++ = 0xd8a1f840;
664       * p++ = 0xd8c1f848;
665       * p++ = 0xd8e1f850;
666       * p++ = 0xd901f858;
667 #else
668       /* these nops could be replaced with a smaller codeSnippetSize - 8 * 4 */
669       * p++ = 0x60000000;
670       * p++ = 0x60000000;
671       * p++ = 0x60000000;
672       * p++ = 0x60000000;
673       * p++ = 0x60000000;
674       * p++ = 0x60000000;
675       * p++ = 0x60000000;
676       * p++ = 0x60000000;
677 #endif
678       * p++ = 0x3c600000 | (((unsigned long)cpp_vtable_call) >> 16);
679       * p++ = 0x60630000 | (((unsigned long)cpp_vtable_call) & 0x0000FFFF);
680       * p++ = 0x7c6903a6;
681       * p++ = 0x3c600000 | (((unsigned long)functionIndex) >> 16);
682       * p++ = 0x60630000 | (((unsigned long)functionIndex) & 0x0000FFFF);
683       * p++ = 0x3c800000 | (((unsigned long)vtableOffset) >> 16);
684       * p++ = 0x60840000 | (((unsigned long)vtableOffset) & 0x0000FFFF);
685       * p++ = 0x38a1f800;
686 #ifndef __NO_FPRS__
687       * p++ = 0x38c1f820;
688 #else
689       * p++ = 0x38c00000;
690 #endif
691       * p++ = 0x38e10008;
692       * p++ = 0x4e800420;
693       return (code + codeSnippetSize);
694 
695 }
696 
697 
698 }
699 
700 void bridges::cpp_uno::shared::VtableFactory::flushCode(unsigned char const * bptr, unsigned char const * eptr)
701 {
702     int const lineSize = 32;
703     for (unsigned char const * p = bptr; p < eptr + lineSize; p += lineSize) {
704         __asm__ volatile ("dcbst 0, %0" : : "r"(p) : "memory");
705     }
706     __asm__ volatile ("sync" : : : "memory");
707     for (unsigned char const * p = bptr; p < eptr + lineSize; p += lineSize) {
708         __asm__ volatile ("icbi 0, %0" : : "r"(p) : "memory");
709     }
710     __asm__ volatile ("isync" : : : "memory");
711 }
712 
713 struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };
714 
715 bridges::cpp_uno::shared::VtableFactory::Slot *
716 bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
717 {
718     return static_cast< Slot * >(block) + 2;
719 }
720 
721 sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
722     sal_Int32 slotCount)
723 {
724     return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
725 }
726 
727 bridges::cpp_uno::shared::VtableFactory::Slot *
728 bridges::cpp_uno::shared::VtableFactory::initializeBlock(
729     void * block, sal_Int32 slotCount)
730 {
731     Slot * slots = mapBlockToVtable(block);
732     slots[-2].fn = 0;
733     slots[-1].fn = 0;
734     return slots + slotCount;
735 }
736 
737 unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
738     Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff,
739     typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
740     sal_Int32 functionCount, sal_Int32 vtableOffset)
741 {
742      (*slots) -= functionCount;
743      Slot * s = *slots;
744   // fprintf(stderr, "in addLocalFunctions functionOffset is %x\n",functionOffset);
745   // fprintf(stderr, "in addLocalFunctions vtableOffset is %x\n",vtableOffset);
746   // fflush(stderr);
747 
748     for (sal_Int32 i = 0; i < type->nMembers; ++i) {
749         typelib_TypeDescription * member = 0;
750         TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
751         OSL_ASSERT(member != 0);
752         switch (member->eTypeClass) {
753         case typelib_TypeClass_INTERFACE_ATTRIBUTE:
754             // Getter:
755             (s++)->fn = code + writetoexecdiff;
756             code = codeSnippet(
757                 code, functionOffset++, vtableOffset,
758                 bridges::cpp_uno::shared::isSimpleType(
759                     reinterpret_cast<
760                     typelib_InterfaceAttributeTypeDescription * >(
761                         member)->pAttributeTypeRef));
762 
763             // Setter:
764             if (!reinterpret_cast<
765                 typelib_InterfaceAttributeTypeDescription * >(
766                     member)->bReadOnly)
767             {
768                 (s++)->fn = code + writetoexecdiff;
769                 code = codeSnippet(code, functionOffset++, vtableOffset, true);
770             }
771             break;
772 
773         case typelib_TypeClass_INTERFACE_METHOD:
774             (s++)->fn = code + writetoexecdiff;
775             code = codeSnippet(
776                 code, functionOffset++, vtableOffset,
777                 bridges::cpp_uno::shared::isSimpleType(
778                     reinterpret_cast<
779                     typelib_InterfaceMethodTypeDescription * >(
780                         member)->pReturnTypeRef));
781             break;
782 
783         default:
784             OSL_ASSERT(false);
785             break;
786         }
787         TYPELIB_DANGER_RELEASE(member);
788     }
789     return code;
790 }
791 
792