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