1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
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.
19 *
20 *************************************************************/
21
22
23
24 #include <sal/alloca.h>
25 #include <stdio.h>
26
27 #include <com/sun/star/uno/genfunc.hxx>
28 #include "com/sun/star/uno/RuntimeException.hpp"
29 #include <uno/data.h>
30 #include <typelib/typedescription.hxx>
31
32 #include "bridges/cpp_uno/shared/bridge.hxx"
33 #include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
34 #include "bridges/cpp_uno/shared/types.hxx"
35 #include "bridges/cpp_uno/shared/vtablefactory.hxx"
36
37 #include "share.hxx"
38
39 using namespace ::com::sun::star::uno;
40
41 namespace
42 {
43
44 //==================================================================================================
cpp2uno_call(bridges::cpp_uno::shared::CppInterfaceProxy * pThis,const typelib_TypeDescription * pMemberTypeDescr,typelib_TypeDescriptionReference * pReturnTypeRef,sal_Int32 nParams,typelib_MethodParameter * pParams,void ** pCallStack,sal_Int64 * pRegisterReturn)45 static typelib_TypeClass cpp2uno_call(
46 bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
47 const typelib_TypeDescription * pMemberTypeDescr,
48 typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
49 sal_Int32 nParams, typelib_MethodParameter * pParams,
50 void ** pCallStack,
51 sal_Int64 * pRegisterReturn /* space for register return */ )
52 {
53 // pCallStack: ret, [return ptr], this, params
54 char * pCppStack = (char *)(pCallStack +1);
55
56 // return
57 typelib_TypeDescription * pReturnTypeDescr = 0;
58 if (pReturnTypeRef)
59 TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
60
61 void * pUnoReturn = 0;
62 void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
63
64 if (pReturnTypeDescr)
65 {
66 if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
67 {
68 pUnoReturn = pRegisterReturn; // direct way for simple types
69 }
70 else // complex return via ptr (pCppReturn)
71 {
72 pCppReturn = *(void **)pCppStack;
73 pCppStack += sizeof(void *);
74
75 pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType(
76 pReturnTypeDescr )
77 ? alloca( pReturnTypeDescr->nSize )
78 : pCppReturn); // direct way
79 }
80 }
81 // pop this
82 pCppStack += sizeof( void* );
83
84 // stack space
85 OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
86 // parameters
87 void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
88 void ** pCppArgs = pUnoArgs + nParams;
89 // indizes of values this have to be converted (interface conversion cpp<=>uno)
90 sal_Int32 * pTempIndizes = (sal_Int32 *)(pUnoArgs + (2 * nParams));
91 // type descriptions for reconversions
92 typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
93
94 sal_Int32 nTempIndizes = 0;
95
96 for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
97 {
98 const typelib_MethodParameter & rParam = pParams[nPos];
99 typelib_TypeDescription * pParamTypeDescr = 0;
100 TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
101
102 if (!rParam.bOut
103 && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
104 // value
105 {
106 pCppArgs[nPos] = pCppStack;
107 pUnoArgs[nPos] = pCppStack;
108 switch (pParamTypeDescr->eTypeClass)
109 {
110 case typelib_TypeClass_HYPER:
111 case typelib_TypeClass_UNSIGNED_HYPER:
112 case typelib_TypeClass_DOUBLE:
113 pCppStack += sizeof(sal_Int32); // extra long
114 }
115 // no longer needed
116 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
117 }
118 else // ptr to complex value | ref
119 {
120 pCppArgs[nPos] = *(void **)pCppStack;
121
122 if (! rParam.bIn) // is pure out
123 {
124 // uno out is unconstructed mem!
125 pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
126 pTempIndizes[nTempIndizes] = nPos;
127 // will be released at reconversion
128 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
129 }
130 // is in/inout
131 else if (bridges::cpp_uno::shared::relatesToInterfaceType(
132 pParamTypeDescr ))
133 {
134 uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
135 *(void **)pCppStack, pParamTypeDescr,
136 pThis->getBridge()->getCpp2Uno() );
137 pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
138 // will be released at reconversion
139 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
140 }
141 else // direct way
142 {
143 pUnoArgs[nPos] = *(void **)pCppStack;
144 // no longer needed
145 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
146 }
147 }
148 pCppStack += sizeof(sal_Int32); // standard parameter length
149 }
150
151 // ExceptionHolder
152 uno_Any aUnoExc = {0}; // Any will be constructed by callee
153 uno_Any * pUnoExc = &aUnoExc;
154
155 // invoke uno dispatch call
156 (*pThis->getUnoI()->pDispatcher)(
157 pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
158 #if OSL_DEBUG_LEVEL > 1
159 if (pUnoExc != NULL)
160 fprintf( stderr, ">cpp2uno_call pUnoExc %x\n", pUnoExc);
161 #endif
162
163 // in case an exception occurred...
164 if (pUnoExc)
165 {
166 // destruct temporary in/inout params
167 for ( ; nTempIndizes--; )
168 {
169 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
170
171 if (pParams[nIndex].bIn) // is in/inout => was constructed
172 uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], 0 );
173 TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
174 }
175 if (pReturnTypeDescr)
176 TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
177
178 CPPU_CURRENT_NAMESPACE::raiseException(
179 &aUnoExc, pThis->getBridge()->getUno2Cpp() );
180 // has to destruct the any
181 // is here for dummy
182 return typelib_TypeClass_VOID;
183 }
184 else // else no exception occurred...
185 {
186 // temporary params
187 for ( ; nTempIndizes--; )
188 {
189 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
190 typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
191
192 if (pParams[nIndex].bOut) // inout/out
193 {
194 // convert and assign
195 uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
196 uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
197 pThis->getBridge()->getUno2Cpp() );
198 }
199 // destroy temp uno param
200 uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
201
202 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
203 }
204 // return
205 if (pCppReturn) // has complex return
206 {
207 if (pUnoReturn != pCppReturn) // needs reconversion
208 {
209 uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
210 pThis->getBridge()->getUno2Cpp() );
211 // destroy temp uno return
212 uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
213 }
214 // complex return ptr is set to eax
215 *(void **)pRegisterReturn = pCppReturn;
216 }
217 if (pReturnTypeDescr)
218 {
219 typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
220 TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
221 return eRet;
222 }
223 else
224 return typelib_TypeClass_VOID;
225 }
226 }
227
228
229 //==================================================================================================
cpp_mediate(sal_Int32 nFunctionIndex,sal_Int32 nVtableOffset,void ** pCallStack,sal_Int64 * pRegisterReturn)230 static typelib_TypeClass cpp_mediate(
231 sal_Int32 nFunctionIndex,
232 sal_Int32 nVtableOffset,
233 void ** pCallStack,
234 sal_Int64 * pRegisterReturn /* space for register return */ )
235 {
236 OSL_ENSURE( sizeof(sal_Int32)==sizeof(void *), "### unexpected!" );
237
238 // pCallStack: ret adr, [ret *], this, params
239 void * pThis;
240 if( nFunctionIndex & 0x80000000 )
241 {
242 nFunctionIndex &= 0x7fffffff;
243 pThis = pCallStack[2];
244 }
245 else
246 {
247 pThis = pCallStack[1];
248 }
249 pThis = static_cast< char * >(pThis) - nVtableOffset;
250 bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
251 = bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
252 pThis);
253
254 typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
255
256 OSL_ENSURE( nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" );
257 if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
258 {
259 throw RuntimeException(
260 rtl::OUString::createFromAscii("illegal vtable index!"),
261 (XInterface *)pThis );
262 }
263
264 // determine called method
265 sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
266 OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### illegal member index!" );
267
268 TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
269
270 typelib_TypeClass eRet;
271 switch (aMemberDescr.get()->eTypeClass)
272 {
273 case typelib_TypeClass_INTERFACE_ATTRIBUTE:
274 {
275 if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
276 {
277 // is GET method
278 eRet = cpp2uno_call(
279 pCppI, aMemberDescr.get(),
280 ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
281 0, 0, // no params
282 pCallStack, pRegisterReturn );
283 }
284 else
285 {
286 // is SET method
287 typelib_MethodParameter aParam;
288 aParam.pTypeRef =
289 ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
290 aParam.bIn = sal_True;
291 aParam.bOut = sal_False;
292
293 eRet = cpp2uno_call(
294 pCppI, aMemberDescr.get(),
295 0, // indicates void return
296 1, &aParam,
297 pCallStack, pRegisterReturn );
298 }
299 break;
300 }
301 case typelib_TypeClass_INTERFACE_METHOD:
302 {
303 // is METHOD
304 switch (nFunctionIndex)
305 {
306 case 1: // acquire()
307 pCppI->acquireProxy(); // non virtual call!
308 eRet = typelib_TypeClass_VOID;
309 break;
310 case 2: // release()
311 pCppI->releaseProxy(); // non virtual call!
312 eRet = typelib_TypeClass_VOID;
313 break;
314 case 0: // queryInterface() opt
315 {
316 typelib_TypeDescription * pTD = 0;
317 TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pCallStack[3] )->getTypeLibType() );
318 if (pTD)
319 {
320 XInterface * pInterface = 0;
321 (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
322 pCppI->getBridge()->getCppEnv(),
323 (void **)&pInterface, pCppI->getOid().pData,
324 (typelib_InterfaceTypeDescription *)pTD );
325
326 if (pInterface)
327 {
328 ::uno_any_construct(
329 reinterpret_cast< uno_Any * >( pCallStack[1] ),
330 &pInterface, pTD, cpp_acquire );
331 pInterface->release();
332 TYPELIB_DANGER_RELEASE( pTD );
333 *(void **)pRegisterReturn = pCallStack[1];
334 eRet = typelib_TypeClass_ANY;
335 break;
336 }
337 TYPELIB_DANGER_RELEASE( pTD );
338 }
339 } // else perform queryInterface()
340 default:
341 eRet = cpp2uno_call(
342 pCppI, aMemberDescr.get(),
343 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
344 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
345 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
346 pCallStack, pRegisterReturn );
347 }
348 break;
349 }
350 default:
351 {
352 throw RuntimeException(
353 rtl::OUString::createFromAscii("no member description found!"),
354 (XInterface *)pThis );
355 // is here for dummy
356 eRet = typelib_TypeClass_VOID;
357 }
358 }
359
360 return eRet;
361 }
362
363 //==================================================================================================
364 /**
365 * is called on incoming vtable calls
366 * (called by asm snippets)
367 */
368 static void cpp_vtable_call(
369 int nFunctionIndex, int nVtableOffset, void** pCallStack )
370 __attribute__((regparm(3)));
371
cpp_vtable_call(int nFunctionIndex,int nVtableOffset,void ** pCallStack)372 void cpp_vtable_call( int nFunctionIndex, int nVtableOffset, void** pCallStack )
373 {
374 volatile long nRegReturn[2];
375 typelib_TypeClass aType = cpp_mediate(
376 nFunctionIndex, nVtableOffset, pCallStack, (sal_Int64*)nRegReturn );
377
378 switch( aType )
379 {
380 case typelib_TypeClass_HYPER:
381 case typelib_TypeClass_UNSIGNED_HYPER:
382 __asm__( "movl %1, %%edx\n\t"
383 "movl %0, %%eax\n"
384 : : "m"(nRegReturn[0]), "m"(nRegReturn[1]) );
385 break;
386 case typelib_TypeClass_FLOAT:
387 __asm__( "flds %0\n\t"
388 "fstp %%st(0)\n\t"
389 "flds %0\n"
390 : : "m"(*(float *)nRegReturn) );
391 break;
392 case typelib_TypeClass_DOUBLE:
393 __asm__( "fldl %0\n\t"
394 "fstp %%st(0)\n\t"
395 "fldl %0\n"
396 : : "m"(*(double *)nRegReturn) );
397 break;
398 // case typelib_TypeClass_UNSIGNED_SHORT:
399 // case typelib_TypeClass_SHORT:
400 // __asm__( "movswl %0, %%eax\n"
401 // : : "m"(nRegReturn) );
402 // break;
403 default:
404 __asm__( "movl %0, %%eax\n"
405 : : "m"(nRegReturn[0]) );
406 break;
407 }
408 }
409
410
411 //==================================================================================================
412 int const codeSnippetSize = 20;
413
codeSnippet(unsigned char * code,sal_Int32 functionIndex,sal_Int32 vtableOffset,bool simpleRetType)414 unsigned char * codeSnippet(
415 unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset,
416 bool simpleRetType)
417 {
418 if (!simpleRetType) {
419 functionIndex |= 0x80000000;
420 }
421 unsigned char * p = code;
422 OSL_ASSERT(sizeof (sal_Int32) == 4);
423 // mov function_index, %eax:
424 *p++ = 0xB8;
425 *reinterpret_cast< sal_Int32 * >(p) = functionIndex;
426 p += sizeof (sal_Int32);
427 // mov vtable_offset, %edx:
428 *p++ = 0xBA;
429 *reinterpret_cast< sal_Int32 * >(p) = vtableOffset;
430 p += sizeof (sal_Int32);
431 // mov %esp, %ecx:
432 *p++ = 0x89;
433 *p++ = 0xE1;
434 // jmp cpp_vtable_call:
435 *p++ = 0xE9;
436 *reinterpret_cast< sal_Int32 * >(p)
437 = ((unsigned char *) cpp_vtable_call) - p - sizeof (sal_Int32);
438 p += sizeof (sal_Int32);
439 OSL_ASSERT(p - code <= codeSnippetSize);
440 return code + codeSnippetSize;
441 }
442
443 }
444
445 struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };
446
447 bridges::cpp_uno::shared::VtableFactory::Slot *
mapBlockToVtable(void * block)448 bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
449 {
450 return static_cast< Slot * >(block) + 2;
451 }
452
getBlockSize(sal_Int32 slotCount)453 sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
454 sal_Int32 slotCount)
455 {
456 return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
457 }
458
459 bridges::cpp_uno::shared::VtableFactory::Slot *
initializeBlock(void * block,sal_Int32 slotCount)460 bridges::cpp_uno::shared::VtableFactory::initializeBlock(
461 void * block, sal_Int32 slotCount)
462 {
463 Slot * slots = mapBlockToVtable(block);
464 slots[-2].fn = 0;
465 slots[-1].fn = 0;
466 return slots + slotCount;
467 }
468
addLocalFunctions(Slot ** slots,unsigned char * code,typelib_InterfaceTypeDescription const * type,sal_Int32 functionOffset,sal_Int32 functionCount,sal_Int32 vtableOffset)469 unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
470 Slot ** slots, unsigned char * code,
471 typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
472 sal_Int32 functionCount, sal_Int32 vtableOffset)
473 {
474 (*slots) -= functionCount;
475 Slot * s = *slots;
476 for (sal_Int32 i = 0; i < type->nMembers; ++i) {
477 typelib_TypeDescription * member = 0;
478 TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
479 OSL_ASSERT(member != 0);
480 switch (member->eTypeClass) {
481 case typelib_TypeClass_INTERFACE_ATTRIBUTE:
482 // Getter:
483 (s++)->fn = code;
484 code = codeSnippet(
485 code, functionOffset++, vtableOffset,
486 bridges::cpp_uno::shared::isSimpleType(
487 reinterpret_cast<
488 typelib_InterfaceAttributeTypeDescription * >(
489 member)->pAttributeTypeRef));
490 // Setter:
491 if (!reinterpret_cast<
492 typelib_InterfaceAttributeTypeDescription * >(
493 member)->bReadOnly)
494 {
495 (s++)->fn = code;
496 code = codeSnippet(code, functionOffset++, vtableOffset, true);
497 }
498 break;
499
500 case typelib_TypeClass_INTERFACE_METHOD:
501 (s++)->fn = code;
502 code = codeSnippet(
503 code, functionOffset++, vtableOffset,
504 bridges::cpp_uno::shared::isSimpleType(
505 reinterpret_cast<
506 typelib_InterfaceMethodTypeDescription * >(
507 member)->pReturnTypeRef));
508 break;
509
510 default:
511 OSL_ASSERT(false);
512 break;
513 }
514 TYPELIB_DANGER_RELEASE(member);
515 }
516 return code;
517 }
518
flushCode(unsigned char const *,unsigned char const *)519 void bridges::cpp_uno::shared::VtableFactory::flushCode(
520 unsigned char const *, unsigned char const *)
521 {}
522