1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2009 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 *          Gabe Black
42 */
43
44#ifndef TRACECHILD_ARM_HH
45#define TRACECHILD_ARM_HH
46
47#include <sys/ptrace.h>
48#include <sys/user.h>
49
50#include <cassert>
51#include <string>
52
53#include "base/tracechild.hh"
54
55class ARMTraceChild : public TraceChild
56{
57  public:
58    enum RegNum
59    {
60        // r0 - r3 argument, temp, caller save
61        // r4 - r10 callee save
62        // r11 - FP
63        // r12 - temp
64        // r13 - stack
65        // r14 - link
66        // r15 - pc
67        R0, R1, R2, R3, R4, R5, R6, R7,
68        R8, R9, R10, FP, R12, SP, LR, PC,
69        CPSR,
70        F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15,
71        F16, F17, F18, F19, F20, F21, F22, F23, F24, F25, F26, F27, F28, F29,
72        F30, F31, FPSCR,
73        numregs
74    };
75
76    struct vfp_regs {
77        uint64_t fpregs[32];
78        uint32_t fpscr;
79    };
80
81  private:
82    uint32_t getRegs(user_regs& myregs, int num);
83    uint64_t getFpRegs(vfp_regs &myfpregs, int num);
84
85    user_regs regs;
86    user_regs oldregs;
87
88    vfp_regs fpregs;
89    vfp_regs oldfpregs;
90
91    bool regDiffSinceUpdate[numregs];
92    bool foundMvn;
93
94  protected:
95    bool update(int pid);
96
97  public:
98    ARMTraceChild();
99    bool sendState(int socket);
100
101    int64_t getRegVal(int num);
102    int64_t getOldRegVal(int num);
103
104    bool step();
105
106    uint64_t
107    getPC()
108    {
109        return getRegVal(PC);
110    }
111
112    uint64_t
113    getSP()
114    {
115        return getRegVal(SP);
116    }
117
118    std::ostream & outputStartState(std::ostream & os);
119
120};
121
122#endif
123
124