1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (c) 2014 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2007-2008 The Florida State University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andreas Sandberg
* Stephen Hines
*/
#include "arch/arm/insts/pseudo.hh"
#include "cpu/exec_context.hh"
DecoderFaultInst::DecoderFaultInst(ExtMachInst _machInst)
: ArmStaticInst("gem5decoderFault", _machInst, No_OpClass),
faultId(static_cast<DecoderFault>(
static_cast<uint8_t>(_machInst.decoderFault)))
{
// Don't call execute() if we're on a speculative path and the
// fault is an internal panic fault.
flags[IsNonSpeculative] = (faultId == DecoderFault::PANIC);
}
Fault
DecoderFaultInst::execute(ExecContext *xc, Trace::InstRecord *traceData) const
{
const PCState pc_state(xc->pcState());
const Addr pc(pc_state.instAddr());
switch (faultId) {
case DecoderFault::UNALIGNED:
if (machInst.aarch64) {
return std::make_shared<PCAlignmentFault>(pc);
} else {
// TODO: We should check if we the receiving end is in
// aarch64 mode and raise a PCAlignment fault instead.
return std::make_shared<PrefetchAbort>(
pc, ArmFault::AlignmentFault);
}
case DecoderFault::PANIC:
panic("Internal error in instruction decoder\n");
case DecoderFault::OK:
panic("Decoder fault instruction without decoder fault.\n");
}
panic("Unhandled fault type");
}
const char *
DecoderFaultInst::faultName() const
{
switch (faultId) {
case DecoderFault::OK:
return "OK";
case DecoderFault::UNALIGNED:
return "UnalignedInstruction";
case DecoderFault::PANIC:
return "DecoderPanic";
}
panic("Unhandled fault type");
}
std::string
DecoderFaultInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
return csprintf("gem5fault %s", faultName());
}
FailUnimplemented::FailUnimplemented(const char *_mnemonic,
ExtMachInst _machInst)
: ArmStaticInst(_mnemonic, _machInst, No_OpClass)
{
// don't call execute() (which panics) if we're on a
// speculative path
flags[IsNonSpeculative] = true;
}
FailUnimplemented::FailUnimplemented(const char *_mnemonic,
ExtMachInst _machInst,
const std::string& _fullMnemonic)
: ArmStaticInst(_mnemonic, _machInst, No_OpClass),
fullMnemonic(_fullMnemonic)
{
// don't call execute() (which panics) if we're on a
// speculative path
flags[IsNonSpeculative] = true;
}
Fault
FailUnimplemented::execute(ExecContext *xc, Trace::InstRecord *traceData) const
{
return std::make_shared<UndefinedInstruction>(machInst, false, mnemonic);
}
std::string
FailUnimplemented::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
return csprintf("%-10s (unimplemented)",
fullMnemonic.size() ? fullMnemonic.c_str() : mnemonic);
}
WarnUnimplemented::WarnUnimplemented(const char *_mnemonic,
ExtMachInst _machInst)
: ArmStaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
{
// don't call execute() (which panics) if we're on a
// speculative path
flags[IsNonSpeculative] = true;
}
WarnUnimplemented::WarnUnimplemented(const char *_mnemonic,
ExtMachInst _machInst,
const std::string& _fullMnemonic)
: ArmStaticInst(_mnemonic, _machInst, No_OpClass), warned(false),
fullMnemonic(_fullMnemonic)
{
// don't call execute() (which panics) if we're on a
// speculative path
flags[IsNonSpeculative] = true;
}
Fault
WarnUnimplemented::execute(ExecContext *xc, Trace::InstRecord *traceData) const
{
if (!warned) {
warn("\tinstruction '%s' unimplemented\n",
fullMnemonic.size() ? fullMnemonic.c_str() : mnemonic);
warned = true;
}
return NoFault;
}
std::string
WarnUnimplemented::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
return csprintf("%-10s (unimplemented)",
fullMnemonic.size() ? fullMnemonic.c_str() : mnemonic);
}
FlushPipeInst::FlushPipeInst(const char *_mnemonic, ExtMachInst _machInst)
: ArmStaticInst(_mnemonic, _machInst, No_OpClass)
{
flags[IsNonSpeculative] = true;
}
Fault
FlushPipeInst::execute(ExecContext *xc, Trace::InstRecord *traceData) const
{
Fault fault = std::make_shared<FlushPipe>();
return fault;
}
std::string
FlushPipeInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
return csprintf("%-10s (pipe flush)", mnemonic);
}
|
