xref: /gem5/src/arch/x86/isa/formats/syscall.isa

// -*- mode:c++ -*-

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// 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

////////////////////////////////////////////////////////////////////
//
// "Format" which describes an instruction whose only purpose is to
// call a syscall in SE mode.
//

output header {{
    class SyscallInst : public X86ISA::X86StaticInst
    {
      public:
        static const RegIndex foldOBit = 0;
        /// Constructor
        SyscallInst(const char *_mnemonic, ExtMachInst _machInst,
                OpClass __opClass) :
            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
        {
        }

        std::string generateDisassembly(Addr pc,
                const SymbolTable *symtab) const;
    };
}};

output decoder {{
    std::string SyscallInst::generateDisassembly(Addr PC,
            const SymbolTable *symtab) const
    {
        std::stringstream response;

        printMnemonic(response, mnemonic);
        ccprintf(response, " ");
        printReg(response, _srcRegIdx[0], machInst.opSize);
        return response.str();
    }
}};

def template SyscallExecute {{
    Fault %(class_name)s::execute(ExecContext *xc,
            Trace::InstRecord *traceData) const
    {
        Fault fault = NoFault;
        %(op_decl)s;
        %(op_rd)s;
        %(code)s;
        return fault;
    }
}};

def format SyscallInst(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'SyscallInst', code, opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = BasicDecode.subst(iop)
    exec_output = SyscallExecute.subst(iop)
}};