65 lines
2.8 KiB
C++
65 lines
2.8 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#ifndef __ARCH_SPARC_SYSCALLRETURN_HH__
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#define __ARCH_SPARC_SYSCALLRETURN_HH__
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#include <inttypes.h>
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#include "sim/syscallreturn.hh"
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#include "arch/sparc/regfile.hh"
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#include "cpu/thread_context.hh"
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namespace SparcISA
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{
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static inline void setSyscallReturn(SyscallReturn return_value,
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ThreadContext * tc)
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{
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// check for error condition. SPARC syscall convention is to
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// indicate success/failure in reg the carry bit of the ccr
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// and put the return value itself in the standard return value reg ().
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if (return_value.successful()) {
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// no error, clear XCC.C
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tc->setIntReg(NumIntArchRegs + 2,
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tc->readIntReg(NumIntArchRegs + 2) & 0xEE);
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//tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) & 0xEE);
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tc->setIntReg(ReturnValueReg, return_value.value());
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} else {
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// got an error, set XCC.C
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tc->setIntReg(NumIntArchRegs + 2,
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tc->readIntReg(NumIntArchRegs + 2) | 0x11);
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//tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) | 0x11);
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tc->setIntReg(ReturnValueReg, -return_value.value());
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}
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}
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};
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#endif
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