util/statetrace/arch/tracechild_arm.hh

   1 /*
   2  * Copyright (c) 2009 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  *          Gabe Black
  30  */
  31
  32 #ifndef TRACECHILD_ARM_HH
  33 #define TRACECHILD_ARM_HH
  34
  35 #include <cassert>
  36 #include <string>
  37 #include <sys/user.h>
  38 #include <sys/ptrace.h>
  39 #include "tracechild.hh"
  40
  41
  42 class ARMTraceChild : public TraceChild
  43 {
  44   public:
  45     enum RegNum
  46     {
  47         // r0 - r3 argument, temp, caller save
  48         // r4 - r10 callee save
  49         // r11 - FP
  50         // r12 - temp
  51         // r13 - stack
  52         // r14 - link
  53         // r15 - pc
  54         R0, R1, R2, R3, R4, R5, R6, R7,
  55         R8, R9, R10, FP, R12, SP, LR, PC,
  56         CPSR,
  57         numregs
  58     };
  59   private:
  60     char printBuffer[256];
  61     static const char *regNames[numregs];
  62     uint32_t getRegs(user_regs& myregs, int num);
  63     user_regs regs;
  64     user_regs oldregs;
  65     bool regDiffSinceUpdate[numregs];
  66
  67   protected:
  68     bool update(int pid);
  69
  70   public:
  71     ARMTraceChild();
  72     bool sendState(int socket);
  73
  74     int getNumRegs()
  75     {
  76         return numregs;
  77     }
  78
  79     bool diffSinceUpdate(int num)
  80     {
  81         assert(num < numregs && num >= 0);
  82         return regDiffSinceUpdate[num];
  83     }
  84
  85     std::string getRegName(int num)
  86     {
  87         assert(num < numregs && num >= 0);
  88         return regNames[num];
  89     }
  90
  91     int64_t getRegVal(int num);
  92     int64_t getOldRegVal(int num);
  93
  94     bool step();
  95
  96     uint64_t getPC()
  97     {
  98             return getRegVal(PC);
  99     }
 100
 101     uint64_t getSP()
 102     {
 103             return getRegVal(SP);
 104     }
 105
 106     char * printReg(int num);
 107
 108     std::ostream & outputStartState(std::ostream & os);
 109
 110 };
 111
 112 #endif
 113