syscall.isa revision 10196:be0e1724eb39 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 The Hewlett-Packard Development Company
4// All rights reserved.
5//
6// The license below extends only to copyright in the software and shall
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9// to a hardware implementation of the functionality of the software
10// licensed hereunder.  You may use the software subject to the license
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37//
38// Authors: Gabe Black
39
40////////////////////////////////////////////////////////////////////
41//
42// "Format" which describes an instruction whose only purpose is to
43// call a syscall in SE mode.
44//
45
46output header {{
47    class SyscallInst : public X86ISA::X86StaticInst
48    {
49      public:
50        static const RegIndex foldOBit = 0;
51        /// Constructor
52        SyscallInst(const char *_mnemonic, ExtMachInst _machInst,
53                OpClass __opClass) :
54            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
55        {
56        }
57
58        std::string generateDisassembly(Addr pc,
59                const SymbolTable *symtab) const;
60    };
61}};
62
63output decoder {{
64    std::string SyscallInst::generateDisassembly(Addr PC,
65            const SymbolTable *symtab) const
66    {
67        std::stringstream response;
68
69        printMnemonic(response, mnemonic);
70        ccprintf(response, " ");
71        printReg(response, _srcRegIdx[0], machInst.opSize);
72        return response.str();
73    }
74}};
75
76def template SyscallExecute {{
77    Fault %(class_name)s::execute(CPU_EXEC_CONTEXT *xc,
78            Trace::InstRecord *traceData) const
79    {
80        Fault fault = NoFault;
81        %(op_decl)s;
82        %(op_rd)s;
83        %(code)s;
84        return fault;
85    }
86}};
87
88def format SyscallInst(code, *opt_flags) {{
89    iop = InstObjParams(name, Name, 'SyscallInst', code, opt_flags)
90    header_output = BasicDeclare.subst(iop)
91    decoder_output = BasicConstructor.subst(iop)
92    decode_block = BasicDecode.subst(iop)
93    exec_output = SyscallExecute.subst(iop)
94}};
95
96