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 ////////////////////////////////////////////////////////////////////
  30 //
  31 // Unknown instructions
  32 //
  33
  34 output header {{
  35         std::string inst2string(MachInst machInst);
  36 }};
  37 output decoder {{
  38
  39 std::string inst2string(MachInst machInst)
  40 {
  41     string str = "";
  42     uint32_t mask = 0x80000000;
  43
  44     for(int i=0; i < 32; i++) {
  45         if ((machInst & mask) == 0) {
  46             str += "0";
  47         } else {
  48             str += "1";
  49         }
  50
  51         mask = mask >> 1;
  52     }
  53
  54     return str;
  55 }
  56
  57     std::string
  58     Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  59     {
  60         return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
  61                         "unknown", machInst, OPCODE, inst2string(machInst));
  62     }
  63 }};
  64
  65 output exec {{
  66     Fault
  67     Unknown::execute(%(CPU_exec_context)s *xc,
  68                      Trace::InstRecord *traceData) const
  69     {
  70         panic("attempt to execute unknown instruction "
  71               "(inst 0x%08x, opcode 0x%x, binary: %s)", machInst, OPCODE, inst2string(machInst));
  72         return new UnimplementedOpcodeFault;
  73     }
  74 }};
  75
  76 def format Unknown() {{
  77     decode_block = 'return new Unknown(machInst);\n'
  78 }};
  79