util/statetrace/arch/arm/tracechild.hh

   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
  55 class 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         numregs
  71     };
  72   private:
  73     uint32_t getRegs(user_regs& myregs, int num);
  74     user_regs regs;
  75     user_regs oldregs;
  76     bool regDiffSinceUpdate[numregs];
  77     bool foundMvn;
  78
  79   protected:
  80     bool update(int pid);
  81
  82   public:
  83     ARMTraceChild();
  84     bool sendState(int socket);
  85
  86     int64_t getRegVal(int num);
  87     int64_t getOldRegVal(int num);
  88
  89     bool step();
  90
  91     uint64_t
  92     getPC()
  93     {
  94         return getRegVal(PC);
  95     }
  96
  97     uint64_t
  98     getSP()
  99     {
 100         return getRegVal(SP);
 101     }
 102
 103     std::ostream & outputStartState(std::ostream & os);
 104
 105 };
 106
 107 #endif
 108