process.hh revision 12044:3fbbaad9c5cc 
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 "mem/multi_level_page_table.hh"
47#include "sim/aux_vector.hh"
48#include "sim/process.hh"
49
50class SyscallDesc;
51
52namespace 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        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
86                   Process *process, TheISA::IntReg flags);
87
88        X86Process &
89        operator=(const X86Process &in)
90        {
91            if (this == &in)
92                return *this;
93
94            _gdtStart = in._gdtStart;
95            _gdtSize = in._gdtSize;
96            syscallDescs = in.syscallDescs;
97
98            return *this;
99        }
100    };
101
102    class X86_64Process : public X86Process
103    {
104      protected:
105        X86_64Process(ProcessParams *params, ObjectFile *objFile,
106                      SyscallDesc *_syscallDescs, int _numSyscallDescs);
107
108        class VSyscallPage
109        {
110          public:
111            Addr base;
112            Addr size;
113            Addr vtimeOffset;
114            Addr vgettimeofdayOffset;
115
116            VSyscallPage &
117            operator=(const VSyscallPage &in)
118            {
119                if (this == &in)
120                    return *this;
121
122                base = in.base;
123                size = in.size;
124                vtimeOffset = in.vtimeOffset;
125                vgettimeofdayOffset = in.vgettimeofdayOffset;
126
127                return *this;
128            }
129        };
130        VSyscallPage vsyscallPage;
131
132      public:
133        void argsInit(int pageSize);
134        void initState();
135
136        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
137        /// Explicitly import the otherwise hidden getSyscallArg
138        using Process::getSyscallArg;
139        void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
140        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
141                   Process *process, TheISA::IntReg flags);
142    };
143
144    class I386Process : public X86Process
145    {
146      protected:
147        I386Process(ProcessParams *params, ObjectFile *objFile,
148                    SyscallDesc *_syscallDescs, int _numSyscallDescs);
149
150        class VSyscallPage
151        {
152          public:
153            Addr base;
154            Addr size;
155            Addr vsyscallOffset;
156            Addr vsysexitOffset;
157
158            VSyscallPage &
159            operator=(const VSyscallPage &in)
160            {
161                if (this == &in)
162                    return *this;
163
164                base = in.base;
165                size = in.size;
166                vsyscallOffset = in.vsyscallOffset;
167                vsysexitOffset = in.vsysexitOffset;
168
169                return *this;
170            }
171        };
172        VSyscallPage vsyscallPage;
173
174      public:
175        void argsInit(int pageSize);
176        void initState();
177
178        void syscall(int64_t callnum, ThreadContext *tc,
179                     Fault *fault) override;
180        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
181        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width);
182        void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
183        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
184                   Process *process, TheISA::IntReg flags);
185    };
186
187    /**
188     * Declaration of architectural page table for x86.
189     *
190     * These page tables are stored in system memory and respect x86
191     * specification.
192     */
193    typedef MultiLevelPageTable<PageTableOps> ArchPageTable;
194
195}
196
197#endif // __ARCH_X86_PROCESS_HH__
198