src/arch/mips/remote_gdb.hh

   1 /*
   2  * Copyright (c) 2007 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_MIPS_REMOTE_GDB_HH__
  32 #define __ARCH_MIPS_REMOTE_GDB_HH__
  33
  34 #include "arch/mips/registers.hh"
  35 #include "base/bitfield.hh"
  36 #include "base/remote_gdb.hh"
  37
  38 class System;
  39 class ThreadContext;
  40
  41 namespace MipsISA
  42 {
  43
  44     // The number of special regs depends on gdb.
  45     // Two 32-bit regs are packed into one 64-bit reg.
  46     const int GdbIntArchRegs = NumIntArchRegs / 2;
  47     const int GdbIntSpecialRegs = 6 / 2;
  48     const int GdbFloatArchRegs = NumFloatArchRegs / 2;
  49     const int GdbFloatSpecialRegs = 2 / 2;
  50
  51     const int GdbIntRegs = GdbIntArchRegs + GdbIntSpecialRegs;
  52     const int GdbFloatRegs = GdbFloatArchRegs + GdbFloatSpecialRegs;
  53     const int GdbNumRegs = GdbIntRegs + GdbFloatRegs;
  54
  55     class RemoteGDB : public BaseRemoteGDB
  56     {
  57       protected:
  58         Addr notTakenBkpt;
  59         Addr takenBkpt;
  60
  61       public:
  62         RemoteGDB(System *_system, ThreadContext *tc);
  63
  64       protected:
  65         bool acc(Addr addr, size_t len);
  66
  67         void getregs();
  68         void setregs();
  69
  70         void clearSingleStep();
  71         void setSingleStep();
  72
  73       private:
  74         uint64_t
  75         pack(uint32_t lo, uint32_t hi)
  76         {
  77             return static_cast<uint64_t>(hi) << 32 | lo;
  78         }
  79         uint32_t
  80         unpackLo(uint64_t val)
  81         {
  82             return bits(val, 31, 0);
  83         }
  84         uint32_t
  85         unpackHi(uint64_t val)
  86         {
  87             return bits(val, 63, 32);
  88         }
  89     };
  90 }
  91
  92 #endif /* __ARCH_MIPS_REMOTE_GDB_H__ */