1/*
2 * Copyright (c) 2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 */
30
31#include "arch/x86/stacktrace.hh"
32
33#include <string>
34
35#include "arch/x86/isa_traits.hh"
36#include "arch/x86/vtophys.hh"
37#include "base/bitfield.hh"
38#include "base/trace.hh"
39#include "cpu/base.hh"
40#include "cpu/thread_context.hh"
41#include "mem/fs_translating_port_proxy.hh"
42#include "sim/system.hh"
43
44namespace X86ISA
45{
46
47static int32_t
48readSymbol(ThreadContext *tc, const std::string name)
49{
50 FSTranslatingPortProxy &vp = tc->getVirtProxy();
51 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
52
53 Addr addr;
54 if (!symtab->findAddress(name, addr))
55 panic("thread info not compiled into kernel\n");
56
57 return vp.read<int32_t>(addr, GuestByteOrder);
58}
59
60ProcessInfo::ProcessInfo(ThreadContext *_tc) : tc(_tc)
61{
62 thread_info_size = readSymbol(tc, "thread_info_size");
63 task_struct_size = readSymbol(tc, "task_struct_size");
64 task_off = readSymbol(tc, "thread_info_task");
65 pid_off = readSymbol(tc, "task_struct_pid");
66 name_off = readSymbol(tc, "task_struct_comm");
67}
68
69Addr
70ProcessInfo::task(Addr ksp) const
71{
72 Addr base = ksp & ~0x3fff;
73 if (base == ULL(0xfffffc0000000000))
74 return 0;
75
76 Addr tsk;
77
78 FSTranslatingPortProxy &vp = tc->getVirtProxy();
79 tsk = vp.read<Addr>(base + task_off, GuestByteOrder);
80
81 return tsk;
82}
83
84int
85ProcessInfo::pid(Addr ksp) const
86{
87 Addr task = this->task(ksp);
88 if (!task)
89 return -1;
90
91 uint16_t pd;
92
93 FSTranslatingPortProxy &vp = tc->getVirtProxy();
94 pd = vp.read<uint16_t>(task + pid_off, GuestByteOrder);
95
96 return pd;
97}
98
99std::string
100ProcessInfo::name(Addr ksp) const
101{
102 Addr task = this->task(ksp);
103 if (!task)
104 return "console";
105
106 char comm[256];
| 1/*
2 * Copyright (c) 2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 */
30
31#include "arch/x86/stacktrace.hh"
32
33#include <string>
34
35#include "arch/x86/isa_traits.hh"
36#include "arch/x86/vtophys.hh"
37#include "base/bitfield.hh"
38#include "base/trace.hh"
39#include "cpu/base.hh"
40#include "cpu/thread_context.hh"
41#include "mem/fs_translating_port_proxy.hh"
42#include "sim/system.hh"
43
44namespace X86ISA
45{
46
47static int32_t
48readSymbol(ThreadContext *tc, const std::string name)
49{
50 FSTranslatingPortProxy &vp = tc->getVirtProxy();
51 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
52
53 Addr addr;
54 if (!symtab->findAddress(name, addr))
55 panic("thread info not compiled into kernel\n");
56
57 return vp.read<int32_t>(addr, GuestByteOrder);
58}
59
60ProcessInfo::ProcessInfo(ThreadContext *_tc) : tc(_tc)
61{
62 thread_info_size = readSymbol(tc, "thread_info_size");
63 task_struct_size = readSymbol(tc, "task_struct_size");
64 task_off = readSymbol(tc, "thread_info_task");
65 pid_off = readSymbol(tc, "task_struct_pid");
66 name_off = readSymbol(tc, "task_struct_comm");
67}
68
69Addr
70ProcessInfo::task(Addr ksp) const
71{
72 Addr base = ksp & ~0x3fff;
73 if (base == ULL(0xfffffc0000000000))
74 return 0;
75
76 Addr tsk;
77
78 FSTranslatingPortProxy &vp = tc->getVirtProxy();
79 tsk = vp.read<Addr>(base + task_off, GuestByteOrder);
80
81 return tsk;
82}
83
84int
85ProcessInfo::pid(Addr ksp) const
86{
87 Addr task = this->task(ksp);
88 if (!task)
89 return -1;
90
91 uint16_t pd;
92
93 FSTranslatingPortProxy &vp = tc->getVirtProxy();
94 pd = vp.read<uint16_t>(task + pid_off, GuestByteOrder);
95
96 return pd;
97}
98
99std::string
100ProcessInfo::name(Addr ksp) const
101{
102 Addr task = this->task(ksp);
103 if (!task)
104 return "console";
105
106 char comm[256];
|
107 CopyStringOut(tc, comm, task + name_off, sizeof(comm));
| 107 tc->getVirtProxy().readString(comm, task + name_off, sizeof(comm));
|
108 if (!comm[0])
109 return "startup";
110
111 return comm;
112}
113
114StackTrace::StackTrace()
115 : tc(0), stack(64)
116{
117}
118
119StackTrace::StackTrace(ThreadContext *_tc, const StaticInstPtr &inst)
120 : tc(0), stack(64)
121{
122 trace(_tc, inst);
123}
124
125StackTrace::~StackTrace()
126{
127}
128
129void
130StackTrace::trace(ThreadContext *_tc, bool is_call)
131{
132}
133
134bool
135StackTrace::isEntry(Addr addr)
136{
137 return false;
138}
139
140bool
141StackTrace::decodeStack(MachInst inst, int &disp)
142{
143 disp = 0;
144 return true;
145}
146
147bool
148StackTrace::decodeSave(MachInst inst, int ®, int &disp)
149{
150 reg = 0;
151 disp = 0;
152 return true;
153}
154
155/*
156 * Decode the function prologue for the function we're in, and note
157 * which registers are stored where, and how large the stack frame is.
158 */
159bool
160StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
161 int &size, Addr &ra)
162{
163 size = 0;
164 ra = 0;
165
166 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
| 108 if (!comm[0])
109 return "startup";
110
111 return comm;
112}
113
114StackTrace::StackTrace()
115 : tc(0), stack(64)
116{
117}
118
119StackTrace::StackTrace(ThreadContext *_tc, const StaticInstPtr &inst)
120 : tc(0), stack(64)
121{
122 trace(_tc, inst);
123}
124
125StackTrace::~StackTrace()
126{
127}
128
129void
130StackTrace::trace(ThreadContext *_tc, bool is_call)
131{
132}
133
134bool
135StackTrace::isEntry(Addr addr)
136{
137 return false;
138}
139
140bool
141StackTrace::decodeStack(MachInst inst, int &disp)
142{
143 disp = 0;
144 return true;
145}
146
147bool
148StackTrace::decodeSave(MachInst inst, int ®, int &disp)
149{
150 reg = 0;
151 disp = 0;
152 return true;
153}
154
155/*
156 * Decode the function prologue for the function we're in, and note
157 * which registers are stored where, and how large the stack frame is.
158 */
159bool
160StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
161 int &size, Addr &ra)
162{
163 size = 0;
164 ra = 0;
165
166 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
|
167 MachInst inst;
168 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
| 167 MachInst inst = tc->getVirtProxy().read<MachInst>(pc);
|
169
170 int reg, disp;
171 if (decodeStack(inst, disp)) {
172 if (size) {
173 // panic("decoding frame size again");
174 return true;
175 }
176 size += disp;
177 } else if (decodeSave(inst, reg, disp)) {
178 if (!ra && reg == ReturnAddressReg) {
| 168
169 int reg, disp;
170 if (decodeStack(inst, disp)) {
171 if (size) {
172 // panic("decoding frame size again");
173 return true;
174 }
175 size += disp;
176 } else if (decodeSave(inst, reg, disp)) {
177 if (!ra && reg == ReturnAddressReg) {
|
179 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
| 178 ra = tc->getVirtProxy().read<Addr>(sp + disp);
|
180 if (!ra) {
181 // panic("no return address value pc=%#x\n", pc);
182 return false;
183 }
184 }
185 }
186 }
187
188 return true;
189}
190
191#if TRACING_ON
192void
193StackTrace::dump()
194{
195 StringWrap name(tc->getCpuPtr()->name());
196 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
197
198 DPRINTFN("------ Stack ------\n");
199
200 std::string symbol;
201 for (int i = 0, size = stack.size(); i < size; ++i) {
202 Addr addr = stack[size - i - 1];
203 if (addr == user)
204 symbol = "user";
205 else if (addr == console)
206 symbol = "console";
207 else if (addr == unknown)
208 symbol = "unknown";
209 else
210 symtab->findSymbol(addr, symbol);
211
212 DPRINTFN("%#x: %s\n", addr, symbol);
213 }
214}
215
216#endif
217}
| 179 if (!ra) {
180 // panic("no return address value pc=%#x\n", pc);
181 return false;
182 }
183 }
184 }
185 }
186
187 return true;
188}
189
190#if TRACING_ON
191void
192StackTrace::dump()
193{
194 StringWrap name(tc->getCpuPtr()->name());
195 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
196
197 DPRINTFN("------ Stack ------\n");
198
199 std::string symbol;
200 for (int i = 0, size = stack.size(); i < size; ++i) {
201 Addr addr = stack[size - i - 1];
202 if (addr == user)
203 symbol = "user";
204 else if (addr == console)
205 symbol = "console";
206 else if (addr == unknown)
207 symbol = "unknown";
208 else
209 symtab->findSymbol(addr, symbol);
210
211 DPRINTFN("%#x: %s\n", addr, symbol);
212 }
213}
214
215#endif
216}
|