unknown.isa revision 2649:2fb859a457a2 
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
34output header {{
35        std::string inst2string(MachInst machInst);
36}};
37output decoder {{
38
39std::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
65output 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
76def format Unknown() {{
77    decode_block = 'return new Unknown(machInst);\n'
78}};
79
80