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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_bridges.hxx"
26 
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <hash_map>
30 
31 #include <rtl/alloc.h>
32 #include <osl/mutex.hxx>
33 
34 #include <com/sun/star/uno/genfunc.hxx>
35 #include "com/sun/star/uno/RuntimeException.hpp"
36 #include <uno/data.h>
37 #include <typelib/typedescription.hxx>
38 
39 #include "bridges/cpp_uno/shared/bridge.hxx"
40 #include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
41 #include "bridges/cpp_uno/shared/types.hxx"
42 #include "bridges/cpp_uno/shared/vtablefactory.hxx"
43 
44 #include "abi.hxx"
45 #include "share.hxx"
46 
47 using namespace ::osl;
48 using namespace ::rtl;
49 using namespace ::com::sun::star::uno;
50 
51 //==================================================================================================
52 
53 // Perform the UNO call
54 //
55 // We must convert the paramaters stored in gpreg, fpreg and ovrflw to UNO
56 // arguments and call pThis->getUnoI()->pDispatcher.
57 //
58 // gpreg:  [ret *], this, [gpr params]
59 // fpreg:  [fpr params]
60 // ovrflw: [gpr or fpr params (properly aligned)]
61 //
62 // [ret *] is present when we are returning a structure bigger than 16 bytes
63 // Simple types are returned in rax, rdx (int), or xmm0, xmm1 (fp).
64 // Similarly structures <= 16 bytes are in rax, rdx, xmm0, xmm1 as necessary.
65 static typelib_TypeClass cpp2uno_call(
66 	bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
67 	const typelib_TypeDescription * pMemberTypeDescr,
68 	typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
69 	sal_Int32 nParams, typelib_MethodParameter * pParams,
70 	void ** gpreg, void ** fpreg, void ** ovrflw,
71 	sal_uInt64 * pRegisterReturn /* space for register return */ )
72 {
73 	unsigned int nr_gpr = 0; //number of gpr registers used
74 	unsigned int nr_fpr = 0; //number of fpr registers used
75 
76 	// return
77 	typelib_TypeDescription * pReturnTypeDescr = 0;
78 	if (pReturnTypeRef)
79 		TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
80 
81 	void * pUnoReturn = 0;
82 	void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
83 
84 	if ( pReturnTypeDescr )
85 	{
86 		if ( x86_64::return_in_hidden_param( pReturnTypeRef ) )
87 		{
88 			pCppReturn = *gpreg++;
89 			nr_gpr++;
90 
91 			pUnoReturn = ( bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
92 						   ? alloca( pReturnTypeDescr->nSize )
93 						   : pCppReturn ); // direct way
94 		}
95 		else
96 			pUnoReturn = pRegisterReturn; // direct way for simple types
97 	}
98 
99 	// pop this
100 	gpreg++;
101 	nr_gpr++;
102 
103 	// stack space
104 	// parameters
105 	void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
106 	void ** pCppArgs = pUnoArgs + nParams;
107 	// indizes of values this have to be converted (interface conversion cpp<=>uno)
108 	sal_Int32 * pTempIndizes = (sal_Int32 *)(pUnoArgs + (2 * nParams));
109 	// type descriptions for reconversions
110 	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
111 
112 	sal_Int32 nTempIndizes = 0;
113 
114 	for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
115 	{
116 		const typelib_MethodParameter & rParam = pParams[nPos];
117 
118 		int nUsedGPR = 0;
119 		int nUsedSSE = 0;
120 #if OSL_DEBUG_LEVEL > 0
121 		bool bFitsRegisters =
122 #endif
123 			x86_64::examine_argument( rParam.pTypeRef, false, nUsedGPR, nUsedSSE );
124 		if ( !rParam.bOut && bridges::cpp_uno::shared::isSimpleType( rParam.pTypeRef ) ) // value
125 		{
126 			// Simple types must fit exactly one register on x86_64
127 			OSL_ASSERT( bFitsRegisters && ( ( nUsedSSE == 1 && nUsedGPR == 0 ) || ( nUsedSSE == 0 && nUsedGPR == 1 ) ) );
128 
129 			if ( nUsedSSE == 1 )
130 			{
131 				if ( nr_fpr < x86_64::MAX_SSE_REGS )
132 				{
133 					pCppArgs[nPos] = pUnoArgs[nPos] = fpreg++;
134 					nr_fpr++;
135 				}
136 				else
137 					pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw++;
138 			}
139 			else if ( nUsedGPR == 1 )
140 			{
141 				if ( nr_gpr < x86_64::MAX_GPR_REGS )
142 				{
143 					pCppArgs[nPos] = pUnoArgs[nPos] = gpreg++;
144 					nr_gpr++;
145 				}
146 				else
147 					pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw++;
148 			}
149 		}
150 		else // struct <= 16 bytes || ptr to complex value || ref
151 		{
152 			typelib_TypeDescription * pParamTypeDescr = 0;
153 			TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
154 
155 			void *pCppStack;
156 			if ( nr_gpr < x86_64::MAX_GPR_REGS )
157 			{
158 				pCppArgs[nPos] = pCppStack = *gpreg++;
159 				nr_gpr++;
160 			}
161 			else
162 				pCppArgs[nPos] = pCppStack = *ovrflw++;
163 
164 			if (! rParam.bIn) // is pure out
165 			{
166 				// uno out is unconstructed mem!
167 				pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
168 				pTempIndizes[nTempIndizes] = nPos;
169 				// will be released at reconversion
170 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
171 			}
172 			else if ( bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr ) ) // is in/inout
173 			{
174 				uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
175 										pCppStack, pParamTypeDescr,
176 										pThis->getBridge()->getCpp2Uno() );
177 				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
178 				// will be released at reconversion
179 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
180 			}
181 			else // direct way
182 			{
183 				pUnoArgs[nPos] = pCppStack;
184 				// no longer needed
185 				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
186 			}
187 		}
188 	}
189 
190 	// ExceptionHolder
191 	uno_Any aUnoExc; // Any will be constructed by callee
192 	uno_Any * pUnoExc = &aUnoExc;
193 
194 	// invoke uno dispatch call
195 	(*pThis->getUnoI()->pDispatcher)( pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
196 
197 	// in case an exception occurred...
198 	if ( pUnoExc )
199 	{
200 		// destruct temporary in/inout params
201 		for ( ; nTempIndizes--; )
202 		{
203 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
204 
205 			if (pParams[nIndex].bIn) // is in/inout => was constructed
206 				uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], 0 );
207 			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
208 		}
209 		if (pReturnTypeDescr)
210 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
211 
212 		CPPU_CURRENT_NAMESPACE::raiseException( &aUnoExc, pThis->getBridge()->getUno2Cpp() ); // has to destruct the any
213 		// is here for dummy
214 		return typelib_TypeClass_VOID;
215 	}
216 	else // else no exception occurred...
217 	{
218 		// temporary params
219 		for ( ; nTempIndizes--; )
220 		{
221 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
222 			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
223 
224 			if ( pParams[nIndex].bOut ) // inout/out
225 			{
226 				// convert and assign
227 				uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
228 				uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
229 										pThis->getBridge()->getUno2Cpp() );
230 			}
231 			// destroy temp uno param
232 			uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
233 
234 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
235 		}
236 		// return
237 		if ( pCppReturn ) // has complex return
238 		{
239 			if ( pUnoReturn != pCppReturn ) // needs reconversion
240 			{
241 				uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
242 										pThis->getBridge()->getUno2Cpp() );
243 				// destroy temp uno return
244 				uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
245 			}
246 			// complex return ptr is set to return reg
247 			*(void **)pRegisterReturn = pCppReturn;
248 		}
249 		if ( pReturnTypeDescr )
250 		{
251 			typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
252 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
253 			return eRet;
254 		}
255 		else
256 			return typelib_TypeClass_VOID;
257 	}
258 }
259 
260 
261 //==================================================================================================
262 extern "C" typelib_TypeClass cpp_vtable_call(
263 	sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
264 	void ** gpreg, void ** fpreg, void ** ovrflw,
265 	sal_uInt64 * pRegisterReturn /* space for register return */ )
266 {
267 	// gpreg:  [ret *], this, [other gpr params]
268 	// fpreg:  [fpr params]
269 	// ovrflw: [gpr or fpr params (properly aligned)]
270 	void * pThis;
271 	if ( nFunctionIndex & 0x80000000 )
272 	{
273 		nFunctionIndex &= 0x7fffffff;
274 		pThis = gpreg[1];
275 	}
276 	else
277 	{
278 		pThis = gpreg[0];
279 	}
280 	pThis = static_cast<char *>( pThis ) - nVtableOffset;
281 
282 	bridges::cpp_uno::shared::CppInterfaceProxy * pCppI =
283 		bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy( pThis );
284 
285 	typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
286 
287 	OSL_ENSURE( nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!\n" );
288 	if ( nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex )
289 	{
290 		throw RuntimeException( OUString::createFromAscii("illegal vtable index!"),
291 								reinterpret_cast<XInterface *>( pCppI ) );
292 	}
293 
294 	// determine called method
295 	sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
296 	OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### illegal member index!\n" );
297 
298 	TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
299 
300 	typelib_TypeClass eRet;
301 	switch ( aMemberDescr.get()->eTypeClass )
302 	{
303 		case typelib_TypeClass_INTERFACE_ATTRIBUTE:
304 		{
305 			typelib_TypeDescriptionReference *pAttrTypeRef =
306 				reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>( aMemberDescr.get() )->pAttributeTypeRef;
307 
308 			if ( pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex )
309 			{
310 				// is GET method
311 				eRet = cpp2uno_call( pCppI, aMemberDescr.get(), pAttrTypeRef,
312 						0, 0, // no params
313 						gpreg, fpreg, ovrflw, pRegisterReturn );
314 			}
315 			else
316 			{
317 				// is SET method
318 				typelib_MethodParameter aParam;
319 				aParam.pTypeRef = pAttrTypeRef;
320 				aParam.bIn		= sal_True;
321 				aParam.bOut		= sal_False;
322 
323 				eRet = cpp2uno_call( pCppI, aMemberDescr.get(),
324 						0, // indicates void return
325 						1, &aParam,
326 						gpreg, fpreg, ovrflw, pRegisterReturn );
327 			}
328 			break;
329 		}
330 		case typelib_TypeClass_INTERFACE_METHOD:
331 		{
332 			// is METHOD
333 			switch ( nFunctionIndex )
334 			{
335 				case 1: // acquire()
336 					pCppI->acquireProxy(); // non virtual call!
337 					eRet = typelib_TypeClass_VOID;
338 					break;
339 				case 2: // release()
340 					pCppI->releaseProxy(); // non virtual call!
341 					eRet = typelib_TypeClass_VOID;
342 					break;
343 				case 0: // queryInterface() opt
344 				{
345 					typelib_TypeDescription * pTD = 0;
346 					TYPELIB_DANGER_GET( &pTD, reinterpret_cast<Type *>( gpreg[2] )->getTypeLibType() );
347 					if ( pTD )
348 					{
349 						XInterface * pInterface = 0;
350 						(*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)
351 							( pCppI->getBridge()->getCppEnv(),
352 							  (void **)&pInterface,
353 							  pCppI->getOid().pData,
354 							  reinterpret_cast<typelib_InterfaceTypeDescription *>( pTD ) );
355 
356 						if ( pInterface )
357 						{
358 							::uno_any_construct( reinterpret_cast<uno_Any *>( gpreg[0] ),
359 												 &pInterface, pTD, cpp_acquire );
360 
361 							pInterface->release();
362 							TYPELIB_DANGER_RELEASE( pTD );
363 
364 							reinterpret_cast<void **>( pRegisterReturn )[0] = gpreg[0];
365 							eRet = typelib_TypeClass_ANY;
366 							break;
367 						}
368 						TYPELIB_DANGER_RELEASE( pTD );
369 					}
370 				} // else perform queryInterface()
371 				default:
372 				{
373 					typelib_InterfaceMethodTypeDescription *pMethodTD =
374 						reinterpret_cast<typelib_InterfaceMethodTypeDescription *>( aMemberDescr.get() );
375 
376 					eRet = cpp2uno_call( pCppI, aMemberDescr.get(),
377 										 pMethodTD->pReturnTypeRef,
378 										 pMethodTD->nParams,
379 										 pMethodTD->pParams,
380 										 gpreg, fpreg, ovrflw, pRegisterReturn );
381 				}
382 			}
383 			break;
384 		}
385 		default:
386 		{
387 			throw RuntimeException( OUString::createFromAscii("no member description found!"),
388 									reinterpret_cast<XInterface *>( pCppI ) );
389 			// is here for dummy
390 			eRet = typelib_TypeClass_VOID;
391 		}
392 	}
393 
394 	return eRet;
395 }
396 
397 //==================================================================================================
398 extern "C" void privateSnippetExecutor( void )
399 {
400     asm volatile
401         (
402          "    subq  $160, %rsp\n"
403          "    movq  %r10, -152(%rbp)        # Save (nVtableOffset << 32) + nFunctionIndex\n"
404 
405          "    movq  %rdi, -112(%rbp)        # Save GP registers\n"
406          "    movq  %rsi, -104(%rbp)\n"
407          "    movq  %rdx, -96(%rbp)\n"
408          "    movq  %rcx, -88(%rbp)\n"
409          "    movq  %r8 , -80(%rbp)\n"
410          "    movq  %r9 , -72(%rbp)\n"
411 
412          "    movsd %xmm0, -64(%rbp)        # Save FP registers\n"
413          "    movsd %xmm1, -56(%rbp)\n"
414          "    movsd %xmm2, -48(%rbp)\n"
415          "    movsd %xmm3, -40(%rbp)\n"
416          "    movsd %xmm4, -32(%rbp)\n"
417          "    movsd %xmm5, -24(%rbp)\n"
418          "    movsd %xmm6, -16(%rbp)\n"
419          "    movsd %xmm7, -8(%rbp)\n"
420 
421          "    leaq  -144(%rbp), %r9         # 6th param: sal_uInt64 * pRegisterReturn\n"
422          "    leaq  16(%rbp), %r8           # 5rd param: void ** ovrflw\n"
423          "    leaq  -64(%rbp), %rcx         # 4th param: void ** fpreg\n"
424          "    leaq  -112(%rbp), %rdx        # 3rd param: void ** gpreg\n"
425          "    movl  -148(%rbp), %esi        # 2nd param: sal_int32 nVtableOffset\n"
426          "    movl  -152(%rbp), %edi        # 1st param: sal_int32 nFunctionIndex\n"
427 
428          "    call  _cpp_vtable_call\n"
429 
430          "    cmp   $10, %rax               # typelib_TypeClass_FLOAT\n"
431          "    je    .Lfloat\n"
432          "    cmp   $11, %rax               # typelib_TypeClass_DOUBLE\n"
433          "    je    .Lfloat\n"
434 
435          "    movq  -144(%rbp), %rax        # Return value (int case)\n"
436          "    movq  -136(%rbp), %rdx        # Return value (int case)\n"
437          "    movq  -144(%rbp), %xmm0       # Return value (int case)\n"
438          "    movq  -136(%rbp), %xmm1       # Return value (int case)\n"
439          "    jmp   .Lfinish\n"
440 
441          ".Lfloat:\n"
442          "    movlpd    -144(%rbp), %xmm0   # Return value (float/double case)\n"
443 
444          ".Lfinish:\n"
445          "    addq  $160, %rsp\n"
446          );
447 }
448 
449 const int codeSnippetSize = 24;
450 
451 // Generate a trampoline that redirects method calls to
452 // privateSnippetExecutor().
453 //
454 // privateSnippetExecutor() saves all the registers that are used for
455 // parameter passing on x86_64, and calls the cpp_vtable_call().
456 // When it returns, privateSnippetExecutor() sets the return value.
457 //
458 // Note: The code snippet we build here must not create a stack frame,
459 // otherwise the UNO exceptions stop working thanks to non-existing
460 // unwinding info.
461 unsigned char * codeSnippet( unsigned char * code,
462         sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
463         bool bHasHiddenParam ) SAL_THROW( () )
464 {
465 	sal_uInt64 nOffsetAndIndex = ( ( (sal_uInt64) nVtableOffset ) << 32 ) | ( (sal_uInt64) nFunctionIndex );
466 
467 	if ( bHasHiddenParam )
468 		nOffsetAndIndex |= 0x80000000;
469 
470 	// movq $<nOffsetAndIndex>, %r10
471 	*reinterpret_cast<sal_uInt16 *>( code ) = 0xba49;
472 	*reinterpret_cast<sal_uInt64 *>( code + 2 ) = nOffsetAndIndex;
473 
474 	// movq $<address of the privateSnippetExecutor>, %r11
475 	*reinterpret_cast<sal_uInt16 *>( code + 10 ) = 0xbb49;
476 	*reinterpret_cast<sal_uInt64 *>( code + 12 ) = reinterpret_cast<sal_uInt64>( privateSnippetExecutor );
477 
478 	// jmpq *%r11
479 	*reinterpret_cast<sal_uInt32 *>( code + 20 ) = 0x00e3ff49;
480 
481 	return code + codeSnippetSize;
482 }
483 
484 //==================================================================================================
485 struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };
486 
487 bridges::cpp_uno::shared::VtableFactory::Slot *
488 bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
489 {
490     return static_cast< Slot * >(block) + 2;
491 }
492 
493 //==================================================================================================
494 sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
495     sal_Int32 slotCount)
496 {
497     return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
498 }
499 
500 //==================================================================================================
501 bridges::cpp_uno::shared::VtableFactory::Slot *
502 bridges::cpp_uno::shared::VtableFactory::initializeBlock(
503     void * block, sal_Int32 slotCount)
504 {
505     Slot * slots = mapBlockToVtable(block);
506     slots[-2].fn = 0;
507     slots[-1].fn = 0;
508     return slots + slotCount;
509 }
510 
511 //==================================================================================================
512 
513 unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
514 	Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff,
515 	typelib_InterfaceTypeDescription const * type, sal_Int32 nFunctionOffset,
516 	sal_Int32 functionCount, sal_Int32 nVtableOffset )
517 {
518 	(*slots) -= functionCount;
519 	Slot * s = *slots;
520 	for ( sal_Int32 nPos = 0; nPos < type->nMembers; ++nPos )
521 	{
522 		typelib_TypeDescription * pTD = 0;
523 
524 		TYPELIB_DANGER_GET( &pTD, type->ppMembers[ nPos ] );
525 		OSL_ASSERT( pTD );
526 
527 		if ( typelib_TypeClass_INTERFACE_ATTRIBUTE == pTD->eTypeClass )
528 		{
529 			typelib_InterfaceAttributeTypeDescription *pAttrTD =
530 				reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>( pTD );
531 
532 			// get method
533 			(s++)->fn = code + writetoexecdiff;
534 			code = codeSnippet( code, nFunctionOffset++, nVtableOffset,
535 								x86_64::return_in_hidden_param( pAttrTD->pAttributeTypeRef ) );
536 
537 			if ( ! pAttrTD->bReadOnly )
538 			{
539 				// set method
540 				(s++)->fn = code + writetoexecdiff;
541 				code = codeSnippet( code, nFunctionOffset++, nVtableOffset, false );
542 			}
543 		}
544 		else if ( typelib_TypeClass_INTERFACE_METHOD == pTD->eTypeClass )
545 		{
546 			typelib_InterfaceMethodTypeDescription *pMethodTD =
547 				reinterpret_cast<typelib_InterfaceMethodTypeDescription *>( pTD );
548 
549 			(s++)->fn = code + writetoexecdiff;
550 			code = codeSnippet( code, nFunctionOffset++, nVtableOffset,
551 								x86_64::return_in_hidden_param( pMethodTD->pReturnTypeRef ) );
552 		}
553 		else
554 			OSL_ASSERT( false );
555 
556 		TYPELIB_DANGER_RELEASE( pTD );
557 	}
558 	return code;
559 }
560 
561 //==================================================================================================
562 void bridges::cpp_uno::shared::VtableFactory::flushCode(
563 	unsigned char const *, unsigned char const * )
564 {
565 }
566