1// -*- mode:c++ -*-
2
3// Copyright (c) 2007-2008 The Florida State University
4// Copyright (c) 2009 The University of Edinburgh
5// All rights reserved.
6//
7// Redistribution and use in source and binary forms, with or without
8// modification, are permitted provided that the following conditions are
9// met: redistributions of source code must retain the above copyright
10// notice, this list of conditions and the following disclaimer;
11// redistributions in binary form must reproduce the above copyright
12// notice, this list of conditions and the following disclaimer in the
13// documentation and/or other materials provided with the distribution;
14// neither the name of the copyright holders nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// Authors: Stephen Hines
31// Timothy M. Jones
32
33////////////////////////////////////////////////////////////////////
34//
35// Unknown instructions
36//
37
38output header {{
39 /**
40 * Static instruction class for unknown (illegal) instructions.
41 * These cause simulator termination if they are executed in a
42 * non-speculative mode. This is a leaf class.
43 */
44 class Unknown : public PowerStaticInst
45 {
46 public:
47 /// Constructor
48 Unknown(ExtMachInst _machInst)
49 : PowerStaticInst("unknown", _machInst, No_OpClass)
50 {
51 // don't call execute() (which panics) if we're on a
52 // speculative path
53 flags[IsNonSpeculative] = true;
54 }
55
56 %(BasicExecDeclare)s
57
58 std::string
59 generateDisassembly(Addr pc, const SymbolTable *symtab) const;
60 };
61}};
62
63output decoder {{
64 std::string
65 Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
66 {
67 return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
68 "unknown", machInst, OPCODE, inst2string(machInst));
69 }
70}};
71
72output exec {{
73 Fault
74 Unknown::execute(%(CPU_exec_context)s *xc,
75 Trace::InstRecord *traceData) const
76 {
77 panic("attempt to execute unknown instruction at %#x"
78 "(inst 0x%08x, opcode 0x%x, binary: %s)",
79 xc->readPC(), machInst, OPCODE, inst2string(machInst));
80 return new UnimplementedOpcodeFault;
81 }
82}};
83
84def format Unknown() {{
85 decode_block = 'return new Unknown(machInst);\n'
86}};
87