stacktrace.cc revision 11793 
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
44using namespace std;
45namespace ArmISA
46{
47    ProcessInfo::ProcessInfo(ThreadContext *_tc)
48        : tc(_tc)
49    {
50        Addr addr = 0;
51
52        FSTranslatingPortProxy &vp = tc->getVirtProxy();
53
54        if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr))
55            panic("thread info not compiled into kernel\n");
56        thread_info_size = vp.readGtoH<int32_t>(addr);
57
58        if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr))
59            panic("thread info not compiled into kernel\n");
60        task_struct_size = vp.readGtoH<int32_t>(addr);
61
62        if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr))
63            panic("thread info not compiled into kernel\n");
64        task_off = vp.readGtoH<int32_t>(addr);
65
66        if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr))
67            panic("thread info not compiled into kernel\n");
68        pid_off = vp.readGtoH<int32_t>(addr);
69
70        if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr))
71            panic("thread info not compiled into kernel\n");
72        name_off = vp.readGtoH<int32_t>(addr);
73    }
74
75    Addr
76    ProcessInfo::task(Addr ksp) const
77    {
78        Addr base = ksp & ~0x1fff;
79        if (base == ULL(0xffffffffc0000000))
80            return 0;
81
82        Addr tsk;
83
84        FSTranslatingPortProxy &vp = tc->getVirtProxy();
85        tsk = vp.readGtoH<Addr>(base + task_off);
86
87        return tsk;
88    }
89
90    int
91    ProcessInfo::pid(Addr ksp) const
92    {
93        Addr task = this->task(ksp);
94        if (!task)
95            return -1;
96
97        uint16_t pd;
98
99        FSTranslatingPortProxy &vp = tc->getVirtProxy();
100        pd = vp.readGtoH<uint16_t>(task + pid_off);
101
102        return pd;
103    }
104
105    string
106    ProcessInfo::name(Addr ksp) const
107    {
108        Addr task = this->task(ksp);
109        if (!task)
110            return "unknown";
111
112        char comm[256];
113        CopyStringOut(tc, comm, task + name_off, sizeof(comm));
114        if (!comm[0])
115            return "startup";
116
117        return comm;
118    }
119
120    StackTrace::StackTrace()
121        : tc(0), stack(64)
122    {
123    }
124
125    StackTrace::StackTrace(ThreadContext *_tc, const StaticInstPtr &inst)
126        : tc(0), stack(64)
127    {
128        trace(_tc, inst);
129    }
130
131    StackTrace::~StackTrace()
132    {
133    }
134
135    void
136    StackTrace::trace(ThreadContext *_tc, bool is_call)
137    {
138    }
139
140    bool
141    StackTrace::isEntry(Addr addr)
142    {
143        return false;
144    }
145
146    bool
147    StackTrace::decodeStack(MachInst inst, int &disp)
148    {
149        return false;
150    }
151
152    bool
153    StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
154    {
155        return false;
156    }
157
158    /*
159     * Decode the function prologue for the function we're in, and note
160     * which registers are stored where, and how large the stack frame is.
161     */
162    bool
163    StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
164                               int &size, Addr &ra)
165    {
166        return false;
167    }
168
169#if TRACING_ON
170    void
171    StackTrace::dump()
172    {
173        DPRINTFN("------ Stack ------\n");
174
175        DPRINTFN(" Not implemented\n");
176    }
177#endif
178}
179