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/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
* Ali Saidi
*/
#include "arch/sparc/utility.hh"
#if FULL_SYSTEM
#include "arch/sparc/vtophys.hh"
#include "mem/vport.hh"
#endif
namespace SparcISA {
//The caller uses %o0-%05 for the first 6 arguments even if their floating
//point. Double precision floating point values take two registers/args.
//Quads, structs, and unions are passed as pointers. All arguments beyond
//the sixth are passed on the stack past the 16 word window save area,
//space for the struct/union return pointer, and space reserved for the
//first 6 arguments which the caller may use but doesn't have to.
uint64_t getArgument(ThreadContext *tc, int number, bool fp) {
#if FULL_SYSTEM
if (number < NumArgumentRegs) {
return tc->readIntReg(ArgumentReg[number]);
} else {
Addr sp = tc->readIntReg(StackPointerReg);
VirtualPort *vp = tc->getVirtPort();
uint64_t arg = vp->read<uint64_t>(sp + 92 +
(number-NumArgumentRegs) * sizeof(uint64_t));
tc->delVirtPort(vp);
return arg;
}
#else
panic("getArgument() only implemented for FULL_SYSTEM\n");
M5_DUMMY_RETURN
#endif
}
} //namespace SPARC_ISA
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