unknown.isa revision 2665:a124942bacb8 
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
36output header {{
37        std::string inst2string(MachInst machInst);
38}};
39output decoder {{
40
41std::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
67output 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
78def format Unknown() {{
79    decode_block = 'return new Unknown(machInst);\n'
80}};
81
82