src/arch/mips/isa/formats/unknown.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2003-2005 The Regents of The University of Michigan
   4 // All rights reserved.
   5 //
   6 // Redistribution and use in source and binary forms, with or without
   7 // modification, are permitted provided that the following conditions are
   8 // met: redistributions of source code must retain the above copyright
   9 // notice, this list of conditions and the following disclaimer;
  10 // redistributions in binary form must reproduce the above copyright
  11 // notice, this list of conditions and the following disclaimer in the
  12 // documentation and/or other materials provided with the distribution;
  13 // neither the name of the copyright holders nor the names of its
  14 // contributors may be used to endorse or promote products derived from
  15 // this software without specific prior written permission.
  16 //
  17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29 // Authors: Korey Sewell
  30
  31 ////////////////////////////////////////////////////////////////////
  32 //
  33 // Unknown instructions
  34 //
  35
  36 output header {{
  37         std::string inst2string(MachInst machInst);
  38 }};
  39 output decoder {{
  40
  41 std::string inst2string(MachInst machInst)
  42 {
  43     string str = "";
  44     uint32_t mask = 0x80000000;
  45
  46     for(int i=0; i < 32; i++) {
  47         if ((machInst & mask) == 0) {
  48             str += "0";
  49         } else {
  50             str += "1";
  51         }
  52
  53         mask = mask >> 1;
  54     }
  55
  56     return str;
  57 }
  58
  59     std::string
  60     Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  61     {
  62         return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
  63                         "unknown", machInst, OPCODE, inst2string(machInst));
  64     }
  65 }};
  66
  67 output exec {{
  68     Fault
  69     Unknown::execute(%(CPU_exec_context)s *xc,
  70                      Trace::InstRecord *traceData) const
  71     {
  72         panic("attempt to execute unknown instruction "
  73               "(inst 0x%08x, opcode 0x%x, binary: %s)", machInst, OPCODE, inst2string(machInst));
  74         return new UnimplementedOpcodeFault;
  75     }
  76 }};
  77
  78 def format Unknown() {{
  79     decode_block = 'return new Unknown(machInst);\n'
  80 }};
  81