src/arch/x86/isa/formats/syscall.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2007 The Hewlett-Packard Development Company
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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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  27 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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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
  46 output 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
  63 output 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
  76 def template SyscallExecute {{
  77     Fault %(class_name)s::execute(%(CPU_exec_context)s *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
  88 def 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