syscall.isa revision 4712:79b4c64296ce 
1// -*- mode:c++ -*-
2
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56// Authors: Gabe Black
57
58////////////////////////////////////////////////////////////////////
59//
60// "Format" which describes an instruction whose only purpose is to
61// call a syscall in SE mode.
62//
63
64output header {{
65    class SyscallInst : public X86ISA::X86StaticInst
66    {
67      public:
68        /// Constructor
69        SyscallInst(const char *_mnemonic, ExtMachInst _machInst,
70                OpClass __opClass) :
71            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
72        {
73        }
74
75        std::string generateDisassembly(Addr pc,
76                const SymbolTable *symtab) const;
77    };
78}};
79
80output decoder {{
81    std::string SyscallInst::generateDisassembly(Addr PC,
82            const SymbolTable *symtab) const
83    {
84        std::stringstream response;
85
86        printMnemonic(response, mnemonic);
87        ccprintf(response, " ");
88        printReg(response, _srcRegIdx[0], machInst.opSize);
89        return response.str();
90    }
91}};
92
93def template SyscallExecute {{
94    Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
95            Trace::InstRecord *traceData) const
96    {
97        Fault fault = NoFault;
98        %(op_decl)s;
99        %(op_rd)s;
100        %(code)s;
101        return fault;
102    }
103}};
104
105def format SyscallInst(code, *opt_flags) {{
106    iop = InstObjParams(name, Name, 'SyscallInst', code, opt_flags)
107    header_output = BasicDeclare.subst(iop)
108    decoder_output = BasicConstructor.subst(iop)
109    decode_block = BasicDecode.subst(iop)
110    exec_output = SyscallExecute.subst(iop)
111}};
112
113