isa/microops/debug.isa

// Copyright (c) 2008 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
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// modified or unmodified, in source code or in binary form.
//
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// 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
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// Authors: Gabe Black

//////////////////////////////////////////////////////////////////////////
//
// Debug Microops
//
//////////////////////////////////////////////////////////////////////////

output header {{
    class MicroDebugBase : public X86ISA::X86MicroopBase
    {
      protected:
        std::string message;
        uint8_t cc;

      public:
        MicroDebugBase(ExtMachInst _machInst, const char * mnem,
                const char * instMnem, uint64_t setFlags,
                std::string _message, uint8_t _cc);

        MicroDebugBase(ExtMachInst _machInst, const char * mnem,
                const char * instMnem, std::string _message, uint8_t _cc);

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

def template MicroDebugDeclare {{
    class %(class_name)s : public %(base_class)s
    {
      private:
        void buildMe();
      public:
        %(class_name)s(ExtMachInst _machInst, const char * instMnem,
                uint64_t setFlags, std::string _message, uint8_t _cc);

        %(class_name)s(ExtMachInst _machInst, const char * instMnem,
                std::string _message, uint8_t _cc);

        %(BasicExecDeclare)s
    };
}};

def template MicroDebugExecute {{
        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
                Trace::InstRecord *traceData) const
        {
            %(op_decl)s
            %(op_rd)s
            if (%(cond_test)s) {
                %(func)s("%s\n", message);
            }
            return NoFault;
        }
}};

output decoder {{
    inline MicroDebugBase::MicroDebugBase(
            ExtMachInst machInst, const char * mnem, const char * instMnem,
            std::string _message, uint8_t _cc) :
        X86MicroopBase(machInst, mnem, instMnem, 0, No_OpClass),
        message(_message), cc(_cc)
    {
    }

    inline MicroDebugBase::MicroDebugBase(
            ExtMachInst machInst, const char * mnem, const char * instMnem,
            uint64_t setFlags, std::string _message, uint8_t _cc) :
        X86MicroopBase(machInst, mnem, instMnem,
                setFlags, No_OpClass),
                message(_message), cc(_cc)
    {
    }
}};

def template MicroDebugConstructor {{

    inline void %(class_name)s::buildMe()
    {
        %(constructor)s;
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            std::string _message, uint8_t _cc) :
        %(base_class)s(machInst, "%(func)s", instMnem, _message, _cc)
    {
        buildMe();
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem, uint64_t setFlags,
            std::string _message, uint8_t _cc) :
        %(base_class)s(machInst, "%(func)s", instMnem,
                setFlags, _message, _cc)
    {
        buildMe();
    }
}};

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

        printMnemonic(response, instMnem, mnemonic);
        response << "\"" << message << "\"";

        return response.str();
    }
}};

let {{
    class MicroDebug(X86Microop):
        def __init__(self, message, flags=None):
            self.message = message
            if flags:
                if not isinstance(flags, (list, tuple)):
                    raise Exception, "flags must be a list or tuple of flags"
                self.cond = " | ".join(flags)
                self.className += "Flags"
            else:
                self.cond = "0"

        def getAllocator(self, microFlags):
            allocator = '''new %(class_name)s(machInst, macrocodeBlock,
                    %(flags)s, "%(message)s", %(cc)s)''' % {
                "class_name" : self.className,
                "flags" : self.microFlagsText(microFlags),
                "message" : self.message,
                "cc" : self.cond}
            return allocator

    exec_output = ""
    header_output = ""
    decoder_output = ""

    def buildDebugMicro(func):
        global exec_output, header_output, decoder_output

        iop = InstObjParams(func, "Micro%sFlags" % func.capitalize(),
                "MicroDebugBase",
                {"code": "",
                 "func": func,
                 "cond_test": "checkCondition(ccFlagBits, cc)"})
        exec_output += MicroDebugExecute.subst(iop)
        header_output += MicroDebugDeclare.subst(iop)
        decoder_output += MicroDebugConstructor.subst(iop)

        iop = InstObjParams(func, "Micro%s" % func.capitalize(),
                "MicroDebugBase",
                {"code": "",
                 "func": func,
                 "cond_test": "true"})
        exec_output += MicroDebugExecute.subst(iop)
        header_output += MicroDebugDeclare.subst(iop)
        decoder_output += MicroDebugConstructor.subst(iop)

        class MicroDebugChild(MicroDebug):
            className = "Micro%s" % func.capitalize()

        global microopClasses
        microopClasses[func] = MicroDebugChild

    buildDebugMicro("panic")
    buildDebugMicro("fatal")
    buildDebugMicro("warn")
    buildDebugMicro("warn_once")
}};