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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "sal/config.h"
#include <cstring>
#include "cppu/macros.hxx"
#include "sal/types.h"
#include "typelib/typeclass.h"
#include "typelib/typedescription.h"
#include "abi.hxx"
#include "callvirtualmethod.hxx"
// The call instruction within the asm block of callVirtualMethod may throw
// exceptions. At least GCC 4.7.0 with -O0 would create (unnecessary)
// .gcc_exception_table call-site table entries around all other calls in this
// function that can throw, leading to std::terminate if the asm call throws an
// exception and the unwinding C++ personality routine finds the unexpected hole
// in the .gcc_exception_table. Therefore, make sure this function explicitly
// only calls nothrow-functions (so GCC 4.7.0 with -O0 happens to not create a
// .gcc_exception_table section at all for this function). For some reason,
// this also needs to be in a source file of its own.
//
// Also, this file should be compiled with -fnon-call-exceptions, and ideally
// there would be a way to tell the compiler that the asm block contains calls
// to functions that can potentially throw; see the mail thread starting at
// <http://gcc.gnu.org/ml/gcc/2012-03/msg00454.html> "C++: Letting compiler know
// asm block can call function that can throw?"
void CPPU_CURRENT_NAMESPACE::callVirtualMethod(
void * pThis, sal_uInt32 nVtableIndex, void * pRegisterReturn,
typelib_TypeDescriptionReference * pReturnTypeRef, bool bSimpleReturn,
sal_uInt64 *pStack, sal_uInt32 nStack, sal_uInt64 *pGPR, sal_uInt32 nGPR,
double * pFPR, sal_uInt32 nFPR)
{
// Should not happen, but...
if ( nFPR > x86_64::MAX_SSE_REGS )
nFPR = x86_64::MAX_SSE_REGS;
if ( nGPR > x86_64::MAX_GPR_REGS )
nGPR = x86_64::MAX_GPR_REGS;
// Get pointer to method
sal_uInt64 pMethod = *((sal_uInt64 *)pThis);
pMethod += 8 * nVtableIndex;
pMethod = *((sal_uInt64 *)pMethod);
// Load parameters to stack, if necessary
if ( nStack )
{
// 16-bytes aligned
sal_uInt32 nStackBytes = ( ( nStack + 1 ) >> 1 ) * 16;
sal_uInt64 *pCallStack = (sal_uInt64 *) __builtin_alloca( nStackBytes );
std::memcpy( pCallStack, pStack, nStackBytes );
}
// Return values
sal_uInt64 rax;
sal_uInt64 rdx;
double xmm0;
double xmm1;
asm volatile (
// Fill the xmm registers
"movq %6, %%rax\n\t"
"movsd (%%rax), %%xmm0\n\t"
"movsd 8(%%rax), %%xmm1\n\t"
"movsd 16(%%rax), %%xmm2\n\t"
"movsd 24(%%rax), %%xmm3\n\t"
"movsd 32(%%rax), %%xmm4\n\t"
"movsd 40(%%rax), %%xmm5\n\t"
"movsd 48(%%rax), %%xmm6\n\t"
"movsd 56(%%rax), %%xmm7\n\t"
// Fill the general purpose registers
"movq %5, %%rax\n\t"
"movq (%%rax), %%rdi\n\t"
"movq 8(%%rax), %%rsi\n\t"
"movq 16(%%rax), %%rdx\n\t"
"movq 24(%%rax), %%rcx\n\t"
"movq 32(%%rax), %%r8\n\t"
"movq 40(%%rax), %%r9\n\t"
// Perform the call
"movq %4, %%r11\n\t"
"movq %7, %%rax\n\t"
"call *%%r11\n\t"
// Fill the return values
"movq %%rax, %0\n\t"
"movq %%rdx, %1\n\t"
"movsd %%xmm0, %2\n\t"
"movsd %%xmm1, %3\n\t"
: "=m" ( rax ), "=m" ( rdx ), "=m" ( xmm0 ), "=m" ( xmm1 )
: "m" ( pMethod ), "m" ( pGPR ), "m" ( pFPR ), "m" ( nFPR )
: "rax", "rdi", "rsi", "rdx", "rcx", "r8", "r9", "r10", "r11",
"xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
"xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"
);
switch (pReturnTypeRef->eTypeClass)
{
case typelib_TypeClass_HYPER:
case typelib_TypeClass_UNSIGNED_HYPER:
*reinterpret_cast<sal_uInt64 *>( pRegisterReturn ) = rax;
break;
case typelib_TypeClass_LONG:
case typelib_TypeClass_UNSIGNED_LONG:
case typelib_TypeClass_ENUM:
*reinterpret_cast<sal_uInt32 *>( pRegisterReturn ) = *reinterpret_cast<sal_uInt32*>( &rax );
break;
case typelib_TypeClass_CHAR:
case typelib_TypeClass_SHORT:
case typelib_TypeClass_UNSIGNED_SHORT:
*reinterpret_cast<sal_uInt16 *>( pRegisterReturn ) = *reinterpret_cast<sal_uInt16*>( &rax );
break;
case typelib_TypeClass_BOOLEAN:
case typelib_TypeClass_BYTE:
*reinterpret_cast<sal_uInt8 *>( pRegisterReturn ) = *reinterpret_cast<sal_uInt8*>( &rax );
break;
case typelib_TypeClass_FLOAT:
case typelib_TypeClass_DOUBLE:
*reinterpret_cast<double *>( pRegisterReturn ) = xmm0;
break;
default:
{
sal_Int32 const nRetSize = pReturnTypeRef->pType->nSize;
if (bSimpleReturn && nRetSize <= 16 && nRetSize > 0)
{
sal_uInt64 longs[2];
longs[0] = rax;
longs[1] = rdx;
double doubles[2];
doubles[0] = xmm0;
doubles[1] = xmm1;
x86_64::fill_struct( pReturnTypeRef, &longs[0], &doubles[0], pRegisterReturn);
}
break;
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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