src/arch/x86/process.hh

   1 /*
   2  * Copyright (c) 2007 The Hewlett-Packard Development Company
   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  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: Gabe Black
  38  */
  39
  40 #ifndef __ARCH_X86_PROCESS_HH__
  41 #define __ARCH_X86_PROCESS_HH__
  42
  43 #include <string>
  44 #include <vector>
  45
  46 #include "arch/x86/pagetable.hh"
  47 #include "mem/multi_level_page_table.hh"
  48 #include "sim/aux_vector.hh"
  49 #include "sim/process.hh"
  50
  51 class SyscallDesc;
  52
  53 namespace X86ISA
  54 {
  55     enum X86AuxiliaryVectorTypes {
  56         M5_AT_SYSINFO = 32,
  57         M5_AT_SYSINFO_EHDR = 33
  58     };
  59
  60     class X86Process : public Process
  61     {
  62       protected:
  63         Addr _gdtStart;
  64         Addr _gdtSize;
  65
  66         SyscallDesc *syscallDescs;
  67         const int numSyscallDescs;
  68
  69         X86Process(ProcessParams * params, ObjectFile *objFile,
  70                    SyscallDesc *_syscallDescs, int _numSyscallDescs);
  71
  72         template<class IntType>
  73         void argsInit(int pageSize,
  74                       std::vector<AuxVector<IntType> > extraAuxvs);
  75
  76       public:
  77         Addr gdtStart()
  78         { return _gdtStart; }
  79
  80         Addr gdtSize()
  81         { return _gdtSize; }
  82
  83         SyscallDesc* getDesc(int callnum) override;
  84
  85         void setSyscallReturn(ThreadContext *tc,
  86                               SyscallReturn return_value) override;
  87         void clone(ThreadContext *old_tc, ThreadContext *new_tc,
  88                    Process *process, RegVal flags) override;
  89
  90         X86Process &
  91         operator=(const X86Process &in)
  92         {
  93             if (this == &in)
  94                 return *this;
  95
  96             _gdtStart = in._gdtStart;
  97             _gdtSize = in._gdtSize;
  98             syscallDescs = in.syscallDescs;
  99
 100             return *this;
 101         }
 102     };
 103
 104     class X86_64Process : public X86Process
 105     {
 106       protected:
 107         X86_64Process(ProcessParams *params, ObjectFile *objFile,
 108                       SyscallDesc *_syscallDescs, int _numSyscallDescs);
 109
 110         class VSyscallPage
 111         {
 112           public:
 113             Addr base;
 114             Addr size;
 115             Addr vtimeOffset;
 116             Addr vgettimeofdayOffset;
 117
 118             VSyscallPage &
 119             operator=(const VSyscallPage &in)
 120             {
 121                 if (this == &in)
 122                     return *this;
 123
 124                 base = in.base;
 125                 size = in.size;
 126                 vtimeOffset = in.vtimeOffset;
 127                 vgettimeofdayOffset = in.vgettimeofdayOffset;
 128
 129                 return *this;
 130             }
 131         };
 132         VSyscallPage vsyscallPage;
 133
 134       public:
 135         void argsInit(int pageSize);
 136         void initState() override;
 137
 138         RegVal getSyscallArg(ThreadContext *tc, int &i) override;
 139         /// Explicitly import the otherwise hidden getSyscallArg
 140         using Process::getSyscallArg;
 141         void clone(ThreadContext *old_tc, ThreadContext *new_tc,
 142                    Process *process, RegVal flags) override;
 143     };
 144
 145     class I386Process : public X86Process
 146     {
 147       protected:
 148         I386Process(ProcessParams *params, ObjectFile *objFile,
 149                     SyscallDesc *_syscallDescs, int _numSyscallDescs);
 150
 151         class VSyscallPage
 152         {
 153           public:
 154             Addr base;
 155             Addr size;
 156             Addr vsyscallOffset;
 157             Addr vsysexitOffset;
 158
 159             VSyscallPage &
 160             operator=(const VSyscallPage &in)
 161             {
 162                 if (this == &in)
 163                     return *this;
 164
 165                 base = in.base;
 166                 size = in.size;
 167                 vsyscallOffset = in.vsyscallOffset;
 168                 vsysexitOffset = in.vsysexitOffset;
 169
 170                 return *this;
 171             }
 172         };
 173         VSyscallPage vsyscallPage;
 174
 175       public:
 176         void argsInit(int pageSize);
 177         void initState() override;
 178
 179         RegVal getSyscallArg(ThreadContext *tc, int &i) override;
 180         RegVal getSyscallArg(ThreadContext *tc, int &i, int width) override;
 181         void clone(ThreadContext *old_tc, ThreadContext *new_tc,
 182                    Process *process, RegVal flags) override;
 183     };
 184
 185 }
 186
 187 #endif // __ARCH_X86_PROCESS_HH__