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#ifndef __ARCH_ALPHA_STACKTRACE_HH__
32#define __ARCH_ALPHA_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36#include "debug/Stack.hh"
37
38class ThreadContext;
39
40namespace AlphaISA {
41
42class StackTrace;
43
44class ProcessInfo
45{
46  private:
47    ThreadContext *tc;
48
49    int thread_info_size;
50    int task_struct_size;
51    int task_off;
52    int pid_off;
53    int name_off;
54
55  public:
56    ProcessInfo(ThreadContext *_tc);
57
58    Addr task(Addr ksp) const;
59    int pid(Addr ksp) const;
60    std::string name(Addr ksp) const;
61};
62
63class StackTrace
64{
65  private:
66    ThreadContext *tc;
67    std::vector<Addr> stack;
68
69  private:
70    bool isEntry(Addr addr);
71    bool decodePrologue(Addr sp, Addr callpc, Addr func, int &size, Addr &ra);
72    bool decodeSave(MachInst inst, int &reg, int &disp);
73    bool decodeStack(MachInst inst, int &disp);
74
75    void trace(ThreadContext *tc, bool is_call);
76
77  public:
78    StackTrace();
79    StackTrace(ThreadContext *tc, const StaticInstPtr &inst);
80    ~StackTrace();
81
82    void
83    clear()
84    {
85        tc = 0;
86        stack.clear();
87    }
88
89    bool valid() const { return tc != NULL; }
90    bool trace(ThreadContext *tc, const StaticInstPtr &inst);
91
92  public:
93    const std::vector<Addr> &getstack() const { return stack; }
94
95    enum {
96        user = 1,
97        console = 2,
98        unknown = 3
99    };
100
101#if TRACING_ON
102  private:
103    void dump();
104
105  public:
106    void dprintf() { if (DTRACE(Stack)) dump(); }
107#else
108  public:
109    void dprintf() {}
110#endif
111};
112
113inline bool
114StackTrace::trace(ThreadContext *tc, const StaticInstPtr &inst)
115{
116    if (!inst->isCall() && !inst->isReturn())
117        return false;
118
119    if (valid())
120        clear();
121
122    trace(tc, !inst->isReturn());
123    return true;
124}
125
126} // namespace AlphaISA
127
128#endif // __ARCH_ALPHA_STACKTRACE_HH__
129