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libreoffice/bridges/source/cpp_uno/gcc3_linux_arm/cpp2uno.cxx
Daniel Baumann 8e63e14cf6
Adding upstream version 4:25.2.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-22 16:20:04 +02:00

593 lines
22 KiB
C++

/* -*- 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 <malloc.h>
#include <typeinfo>
#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 "share.hxx"
#include "call.hxx"
#include <dlfcn.h>
#ifdef ANDROID
#include <unistd.h>
#endif
using namespace ::osl;
using namespace ::com::sun::star::uno;
namespace
{
typelib_TypeClass 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 /* space for register return */ )
{
// pCallStack: ret, [return ptr], this, params
char * pTopStack = reinterpret_cast<char *>(pCallStack + 0);
char * pCppStack = pTopStack;
#ifdef __ARM_PCS_VFP
int dc = 0;
char * pFloatArgs = reinterpret_cast<char *>(pCppStack - 64);
#endif
// return
typelib_TypeDescription * pReturnTypeDescr = nullptr;
if (pReturnTypeRef)
TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
void * pUnoReturn = nullptr;
// complex return ptr: if != 0 && != pUnoReturn, reconversion need
void * pCppReturn = nullptr;
if (pReturnTypeDescr)
{
if (!arm::return_in_hidden_param(pReturnTypeRef))
pUnoReturn = pRegisterReturn; // direct way for simple types
else // complex return via ptr (pCppReturn)
{
pCppReturn = *reinterpret_cast<void **>(pCppStack);
pCppStack += sizeof(void *);
pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType(
pReturnTypeDescr )
? alloca( pReturnTypeDescr->nSize )
: pCppReturn); // direct way
}
}
// pop this
pCppStack += sizeof( void* );
// stack space
static_assert(sizeof(void *) == sizeof(sal_Int32),
"### unexpected size!");
// 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];
typelib_TypeDescription * pParamTypeDescr = nullptr;
TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
if (!rParam.bOut &&
bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
{
#ifdef __ARM_EABI__
switch (pParamTypeDescr->eTypeClass)
{
case typelib_TypeClass_HYPER:
case typelib_TypeClass_UNSIGNED_HYPER:
#ifndef __ARM_PCS_VFP
case typelib_TypeClass_DOUBLE:
#endif
if ((pCppStack - pTopStack) % 8) pCppStack+=sizeof(sal_Int32); //align to 8
break;
default:
break;
}
#endif
// For armhf we get the floating point arguments from a different area of the stack
#ifdef __ARM_PCS_VFP
if (pParamTypeDescr->eTypeClass == typelib_TypeClass_FLOAT)
{
pCppArgs[nPos] = pUnoArgs[nPos] = pFloatArgs;
pFloatArgs += sizeof(float);
} else
if (pParamTypeDescr->eTypeClass == typelib_TypeClass_DOUBLE)
{
if ((pFloatArgs - pTopStack) % 8) pFloatArgs+=sizeof(float); //align to 8
pCppArgs[nPos] = pUnoArgs[nPos] = pFloatArgs;
pFloatArgs += sizeof(double);
if (++dc == arm::MAX_FPR_REGS) {
if (pCppStack - pTopStack < 16)
pCppStack = pTopStack + 16;
pFloatArgs = pCppStack;
}
} else
#endif
pCppArgs[nPos] = pUnoArgs[nPos] = pCppStack;
switch (pParamTypeDescr->eTypeClass)
{
case typelib_TypeClass_HYPER:
case typelib_TypeClass_UNSIGNED_HYPER:
#ifndef __ARM_PCS_VFP
case typelib_TypeClass_DOUBLE:
#endif
pCppStack += sizeof(sal_Int32); // extra long
break;
default:
break;
}
// no longer needed
TYPELIB_DANGER_RELEASE( pParamTypeDescr );
}
else // ptr to complex value | ref
{
pCppArgs[nPos] = *reinterpret_cast<void **>(pCppStack);
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 ),
*reinterpret_cast<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] = *reinterpret_cast<void **>(pCppStack);
// no longer needed
TYPELIB_DANGER_RELEASE( pParamTypeDescr );
}
}
#ifdef __ARM_PCS_VFP
// use the stack for output parameters or non floating point values
if (rParam.bOut ||
((pParamTypeDescr->eTypeClass != typelib_TypeClass_DOUBLE)
&& (pParamTypeDescr->eTypeClass != typelib_TypeClass_FLOAT))
)
#endif
pCppStack += sizeof(sal_Int32); // standard parameter length
}
// 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 eax
*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_mediate(
sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
void ** pCallStack,
sal_Int64 * pRegisterReturn /* space for register return */ )
{
static_assert(sizeof(sal_Int32)==sizeof(void *), "### unexpected!");
// pCallStack: [ret *], this, params
// _this_ ptr is patched cppu_XInterfaceProxy object
void *pThis;
if( nFunctionIndex & 0x80000000 )
{
nFunctionIndex &= 0x7fffffff;
pThis = pCallStack[1];
}
else
{
pThis = pCallStack[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
assert(nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex);
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(),
reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>(aMemberDescr.get())->pAttributeTypeRef,
0, nullptr, // no params
pCallStack, pRegisterReturn );
}
else
{
// is SET method
typelib_MethodParameter aParam;
aParam.pTypeRef =
reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>(aMemberDescr.get())->pAttributeTypeRef;
aParam.bIn = true;
aParam.bOut = false;
eRet = cpp2uno_call(
pCppI, aMemberDescr.get(),
nullptr, // indicates void return
1, &aParam,
pCallStack, 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 *>(pCallStack[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 * >( pCallStack[0] ),
&pInterface, pTD, cpp_acquire );
pInterface->release();
TYPELIB_DANGER_RELEASE( pTD );
*reinterpret_cast<void **>(pRegisterReturn) = pCallStack[0];
eRet = typelib_TypeClass_ANY;
break;
}
TYPELIB_DANGER_RELEASE( pTD );
}
} [[fallthrough]]; // else perform queryInterface()
default:
eRet = cpp2uno_call(
pCppI, aMemberDescr.get(),
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(aMemberDescr.get())->pReturnTypeRef,
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(aMemberDescr.get())->nParams,
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(aMemberDescr.get())->pParams,
pCallStack, pRegisterReturn );
}
break;
}
default:
{
throw RuntimeException( "no member description found!", reinterpret_cast<XInterface *>(pCppI) );
}
}
return eRet;
}
}
/**
* is called on incoming vtable calls
* (called by asm snippets)
*/
sal_Int64 cpp_vtable_call( long *pFunctionAndOffset,
void **pCallStack )
{
sal_Int64 nRegReturn;
typelib_TypeClass aType = cpp_mediate( pFunctionAndOffset[0], pFunctionAndOffset[1], pCallStack,
&nRegReturn );
switch( aType )
{
case typelib_TypeClass_BOOLEAN:
case typelib_TypeClass_BYTE:
nRegReturn = static_cast<unsigned long>(*reinterpret_cast<unsigned char *>(&nRegReturn));
break;
case typelib_TypeClass_CHAR:
case typelib_TypeClass_UNSIGNED_SHORT:
case typelib_TypeClass_SHORT:
nRegReturn = static_cast<unsigned long>(*reinterpret_cast<unsigned short *>(&nRegReturn));
break;
case typelib_TypeClass_ENUM:
case typelib_TypeClass_UNSIGNED_LONG:
case typelib_TypeClass_LONG:
nRegReturn = static_cast<unsigned long>(*reinterpret_cast<unsigned int *>(&nRegReturn));
break;
case typelib_TypeClass_VOID:
default:
break;
}
return nRegReturn;
}
namespace
{
const int codeSnippetSize = 20;
unsigned char *codeSnippet(unsigned char* code, sal_Int32 functionIndex,
sal_Int32 vtableOffset, bool bHasHiddenParam)
{
if (bHasHiddenParam)
functionIndex |= 0x80000000;
unsigned long * p = reinterpret_cast<unsigned long *>(code);
// ARM (not thumb) mode instructions
// mov ip, pc
*p++ = 0xE1A0C00F;
// ldr pc, [pc, #4]
*p++ = 0xE59FF004;
*p++ = static_cast<unsigned long>(functionIndex);
*p++ = static_cast<unsigned long>(vtableOffset);
*p++ = reinterpret_cast<unsigned long>(privateSnippetExecutor);
return code + codeSnippetSize;
}
}
struct bridges::cpp_uno::shared::VtableFactory::Slot { void const * 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;
}
namespace {
// Some dummy type whose RTTI is used in the synthesized proxy vtables to make uses of dynamic_cast
// on such proxy objects not crash:
struct ProxyRtti {};
}
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 = &typeid(ProxyRtti);
return slots + slotCount;
}
unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
Slot ** slots, unsigned char * code,
#ifdef USE_DOUBLE_MMAP
sal_PtrDiff writetoexecdiff,
#endif
typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
sal_Int32 functionCount, sal_Int32 vtableOffset)
{
#ifndef USE_DOUBLE_MMAP
const sal_PtrDiff writetoexecdiff = 0;
#endif
(*slots) -= functionCount;
Slot * s = *slots;
for (sal_Int32 i = 0; i < type->nMembers; ++i)
{
typelib_TypeDescription * member = nullptr;
TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
assert(member != 0);
switch (member->eTypeClass)
{
case typelib_TypeClass_INTERFACE_ATTRIBUTE:
{
typelib_InterfaceAttributeTypeDescription *pAttrTD =
reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>( member );
// Getter:
(s++)->fn = code + writetoexecdiff;
code = codeSnippet(
code, functionOffset++, vtableOffset,
arm::return_in_hidden_param( pAttrTD->pAttributeTypeRef ));
// Setter:
if (!pAttrTD->bReadOnly)
{
(s++)->fn = code + writetoexecdiff;
code = codeSnippet(
code, functionOffset++, vtableOffset, false);
}
break;
}
case typelib_TypeClass_INTERFACE_METHOD:
{
(s++)->fn = code + writetoexecdiff;
typelib_InterfaceMethodTypeDescription *pMethodTD =
reinterpret_cast<
typelib_InterfaceMethodTypeDescription * >(member);
code = codeSnippet(code, functionOffset++, vtableOffset,
arm::return_in_hidden_param(pMethodTD->pReturnTypeRef));
break;
}
default:
assert(false);
break;
}
TYPELIB_DANGER_RELEASE(member);
}
return code;
}
void bridges::cpp_uno::shared::VtableFactory::flushCode(
unsigned char const *beg, unsigned char const *end)
{
#ifndef ANDROID
static void (*clear_cache)(unsigned char const*, unsigned char const*)
= reinterpret_cast<void (*)(unsigned char const*, unsigned char const*)>
(dlsym(RTLD_DEFAULT, "__clear_cache"));
(*clear_cache)(beg, end);
#else
cacheflush((long) beg, (long) end, 0);
#endif
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */