unknown.isa revision 2686:f0d591379ac3 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2005 The Regents of The University of Michigan
4// All rights reserved.
5//
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7// modification, are permitted provided that the following conditions are
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10// redistributions in binary form must reproduce the above copyright
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15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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
36output header {{
37    /**
38     * Static instruction class for unknown (illegal) instructions.
39     * These cause simulator termination if they are executed in a
40     * non-speculative mode.  This is a leaf class.
41     */
42    class Unknown : public MipsStaticInst
43    {
44      public:
45        /// Constructor
46        Unknown(MachInst _machInst)
47            : MipsStaticInst("unknown", _machInst, No_OpClass)
48        {
49            // don't call execute() (which panics) if we're on a
50            // speculative path
51            flags[IsNonSpeculative] = true;
52        }
53
54        %(BasicExecDeclare)s
55
56        std::string
57        generateDisassembly(Addr pc, const SymbolTable *symtab) const;
58    };
59}};
60
61output decoder {{
62    std::string
63    Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
64    {
65        return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
66                        "unknown", machInst, OPCODE, inst2string(machInst));
67    }
68}};
69
70output exec {{
71    Fault
72    Unknown::execute(%(CPU_exec_context)s *xc,
73                     Trace::InstRecord *traceData) const
74    {
75        panic("attempt to execute unknown instruction "
76              "(inst 0x%08x, opcode 0x%x, binary: %s)", machInst, OPCODE, inst2string(machInst));
77        return new UnimplementedOpcodeFault;
78    }
79}};
80
81def format Unknown() {{
82    decode_block = 'return new Unknown(machInst);\n'
83}};
84
85