stacktrace.cc revision 13887 
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/arm/stacktrace.hh"
32
33#include <string>
34
35#include "arch/arm/isa_traits.hh"
36#include "arch/arm/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 ArmISA
45{
46
47ProcessInfo::ProcessInfo(ThreadContext *_tc)
48    : tc(_tc)
49{
50    Addr addr = 0;
51
52    FSTranslatingPortProxy &vp = tc->getVirtProxy();
53
54    if (!tc->getSystemPtr()->kernelSymtab->findAddress(
55                "thread_info_size", addr)) {
56        panic("thread info not compiled into kernel\n");
57    }
58    thread_info_size = vp.readGtoH<int32_t>(addr);
59
60    if (!tc->getSystemPtr()->kernelSymtab->findAddress(
61                "task_struct_size", addr)) {
62        panic("thread info not compiled into kernel\n");
63    }
64    task_struct_size = vp.readGtoH<int32_t>(addr);
65
66    if (!tc->getSystemPtr()->kernelSymtab->findAddress(
67                "thread_info_task", addr)) {
68        panic("thread info not compiled into kernel\n");
69    }
70    task_off = vp.readGtoH<int32_t>(addr);
71
72    if (!tc->getSystemPtr()->kernelSymtab->findAddress(
73                "task_struct_pid", addr)) {
74        panic("thread info not compiled into kernel\n");
75    }
76    pid_off = vp.readGtoH<int32_t>(addr);
77
78    if (!tc->getSystemPtr()->kernelSymtab->findAddress(
79                "task_struct_comm", addr)) {
80        panic("thread info not compiled into kernel\n");
81    }
82    name_off = vp.readGtoH<int32_t>(addr);
83}
84
85Addr
86ProcessInfo::task(Addr ksp) const
87{
88    Addr base = ksp & ~0x1fff;
89    if (base == ULL(0xffffffffc0000000))
90        return 0;
91
92    Addr tsk;
93
94    FSTranslatingPortProxy &vp = tc->getVirtProxy();
95    tsk = vp.readGtoH<Addr>(base + task_off);
96
97    return tsk;
98}
99
100int
101ProcessInfo::pid(Addr ksp) const
102{
103    Addr task = this->task(ksp);
104    if (!task)
105        return -1;
106
107    uint16_t pd;
108
109    FSTranslatingPortProxy &vp = tc->getVirtProxy();
110    pd = vp.readGtoH<uint16_t>(task + pid_off);
111
112    return pd;
113}
114
115std::string
116ProcessInfo::name(Addr ksp) const
117{
118    Addr task = this->task(ksp);
119    if (!task)
120        return "unknown";
121
122    char comm[256];
123    CopyStringOut(tc, comm, task + name_off, sizeof(comm));
124    if (!comm[0])
125        return "startup";
126
127    return comm;
128}
129
130StackTrace::StackTrace()
131    : tc(0), stack(64)
132{
133}
134
135StackTrace::StackTrace(ThreadContext *_tc, const StaticInstPtr &inst)
136    : tc(0), stack(64)
137{
138    trace(_tc, inst);
139}
140
141StackTrace::~StackTrace()
142{
143}
144
145void
146StackTrace::trace(ThreadContext *_tc, bool is_call)
147{
148}
149
150bool
151StackTrace::isEntry(Addr addr)
152{
153    return false;
154}
155
156bool
157StackTrace::decodeStack(MachInst inst, int &disp)
158{
159    return false;
160}
161
162bool
163StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
164{
165    return false;
166}
167
168/*
169 * Decode the function prologue for the function we're in, and note
170 * which registers are stored where, and how large the stack frame is.
171 */
172bool
173StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
174                           int &size, Addr &ra)
175{
176    return false;
177}
178
179#if TRACING_ON
180void
181StackTrace::dump()
182{
183    DPRINTFN("------ Stack ------\n");
184
185    DPRINTFN(" Not implemented\n");
186}
187#endif
188}
189