1/*
2 * Copyright (c) 2004-2005 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: Ali Saidi
29 */
30
31#ifndef __ARCH_MIPS_STACKTRACE_HH__
32#define __ARCH_MIPS_STACKTRACE_HH__
33
34#include "base/trace.hh"
35#include "cpu/static_inst.hh"
36
37class ThreadContext;
38
39namespace MipsISA
40{
41
42class ProcessInfo
43{
44 private:
45 ThreadContext *tc;
46
47 int thread_info_size;
48 int task_struct_size;
49 int task_off;
50 int pid_off;
51 int name_off;
52
53 public:
54 ProcessInfo(ThreadContext *_tc);
55
56 Addr task(Addr ksp) const;
57 int pid(Addr ksp) const;
58 std::string name(Addr ksp) const;
59};
60
61class StackTrace
62{
63 protected:
64 typedef MipsISA::MachInst MachInst;
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, StaticInstPtr inst);
80 ~StackTrace();
81
82 void clear()
83 {
84 tc = 0;
85 stack.clear();
86 }
87
88 bool valid() const { return tc != NULL; }
89 bool trace(ThreadContext *tc, StaticInstPtr inst);
90
91 public:
92 const std::vector<Addr> &getstack() const { return stack; }
93
94 static const int user = 1;
95 static const int console = 2;
96 static const int unknown = 3;
97
98#if TRACING_ON
99 private:
100 void dump();
101
102 public:
103 void dprintf() { if (DTRACE(Stack)) dump(); }
104#else
105 public:
106 void dprintf() {}
107#endif
108};
109
110inline bool
111StackTrace::trace(ThreadContext *tc, StaticInstPtr inst)
112{
113 if (!inst->isCall() && !inst->isReturn())
114 return false;
115
116 if (valid())
117 clear();
118
119 trace(tc, !inst->isReturn());
120 return true;
121}
122
123}
124
125#endif // __ARCH_MIPS_STACKTRACE_HH__