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 "sim/aux_vector.hh"
  47 #include "sim/process.hh"
  48 #include "mem/multi_level_page_table.hh"
  49
  50 class SyscallDesc;
  51
  52 namespace X86ISA
  53 {
  54     enum X86AuxiliaryVectorTypes {
  55         M5_AT_SYSINFO = 32,
  56         M5_AT_SYSINFO_EHDR = 33
  57     };
  58
  59     class X86Process : public Process
  60     {
  61       protected:
  62         Addr _gdtStart;
  63         Addr _gdtSize;
  64
  65         SyscallDesc *syscallDescs;
  66         const int numSyscallDescs;
  67
  68         X86Process(ProcessParams * params, ObjectFile *objFile,
  69                    SyscallDesc *_syscallDescs, int _numSyscallDescs);
  70
  71         template<class IntType>
  72         void argsInit(int pageSize,
  73                 std::vector<AuxVector<IntType> > extraAuxvs);
  74
  75       public:
  76         Addr gdtStart()
  77         { return _gdtStart; }
  78
  79         Addr gdtSize()
  80         { return _gdtSize; }
  81
  82         SyscallDesc* getDesc(int callnum);
  83
  84         void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
  85     };
  86
  87     class X86_64Process : public X86Process
  88     {
  89       protected:
  90         X86_64Process(ProcessParams *params, ObjectFile *objFile,
  91                       SyscallDesc *_syscallDescs, int _numSyscallDescs);
  92
  93         class VSyscallPage
  94         {
  95           public:
  96             Addr base;
  97             Addr size;
  98             Addr vtimeOffset;
  99             Addr vgettimeofdayOffset;
 100         };
 101         VSyscallPage vsyscallPage;
 102
 103       public:
 104         void argsInit(int intSize, int pageSize);
 105         void initState();
 106
 107         X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
 108         /// Explicitly import the otherwise hidden getSyscallArg
 109         using Process::getSyscallArg;
 110         void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
 111     };
 112
 113     class I386Process : public X86Process
 114     {
 115       protected:
 116         I386Process(ProcessParams *params, ObjectFile *objFile,
 117                     SyscallDesc *_syscallDescs, int _numSyscallDescs);
 118
 119         class VSyscallPage
 120         {
 121           public:
 122             Addr base;
 123             Addr size;
 124             Addr vsyscallOffset;
 125             Addr vsysexitOffset;
 126         };
 127         VSyscallPage vsyscallPage;
 128
 129       public:
 130         void argsInit(int intSize, int pageSize);
 131         void initState();
 132
 133         void syscall(int64_t callnum, ThreadContext *tc, Fault *fault);
 134         X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
 135         X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width);
 136         void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
 137     };
 138
 139     /**
 140      * Declaration of architectural page table for x86.
 141      *
 142      * These page tables are stored in system memory and respect x86 specification.
 143      */
 144     typedef MultiLevelPageTable<PageTableOps> ArchPageTable;
 145
 146 }
 147
 148 #endif // __ARCH_X86_PROCESS_HH__