breakpoint.isa revision 7189 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2010 ARM Limited
4// All rights reserved
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating
9// to a hardware implementation of the functionality of the software
10// licensed hereunder.  You may use the software subject to the license
11// terms below provided that you ensure that this notice is replicated
12// unmodified and in its entirety in all distributions of the software,
13// modified or unmodified, in source code or in binary form.
14//
15// Copyright (c) 2007-2008 The Florida State University
16// All rights reserved.
17//
18// Redistribution and use in source and binary forms, with or without
19// modification, are permitted provided that the following conditions are
20// met: redistributions of source code must retain the above copyright
21// notice, this list of conditions and the following disclaimer;
22// redistributions in binary form must reproduce the above copyright
23// notice, this list of conditions and the following disclaimer in the
24// documentation and/or other materials provided with the distribution;
25// neither the name of the copyright holders nor the names of its
26// contributors may be used to endorse or promote products derived from
27// this software without specific prior written permission.
28//
29// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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39// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40//
41// Authors: Stephen Hines
42
43////////////////////////////////////////////////////////////////////
44//
45// Unknown instructions
46//
47
48output header {{
49    /**
50     * Static instruction class for unknown (illegal) instructions.
51     * These cause simulator termination if they are executed in a
52     * non-speculative mode.  This is a leaf class.
53     */
54    class Unknown : public ArmStaticInst
55    {
56      public:
57        /// Constructor
58        Unknown(ExtMachInst _machInst)
59            : ArmStaticInst("unknown", _machInst, No_OpClass)
60        {
61            // don't call execute() (which panics) if we're on a
62            // speculative path
63            flags[IsNonSpeculative] = true;
64        }
65
66        %(BasicExecDeclare)s
67
68        std::string
69        generateDisassembly(Addr pc, const SymbolTable *symtab) const;
70    };
71}};
72
73output decoder {{
74    std::string
75    Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
76    {
77        return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
78                        "unknown", machInst, OPCODE, inst2string(machInst));
79    }
80}};
81
82output exec {{
83    Fault
84    Unknown::execute(%(CPU_exec_context)s *xc,
85                     Trace::InstRecord *traceData) const
86    {
87#if FULL_SYSTEM
88        return new UndefinedInstruction;
89#else
90        return new UndefinedInstruction(machInst, true);
91#endif
92    }
93}};
94
95def format Unknown() {{
96    decode_block = 'return new Unknown(machInst);\n'
97}};
98
99