process.hh revision 12460 
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
51class SyscallDesc;
52
53namespace 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        /**
64         * Declaration of architectural page table for x86.
65         *
66         * These page tables are stored in system memory and respect x86
67         * specification.
68         */
69
70        Addr _gdtStart;
71        Addr _gdtSize;
72
73        SyscallDesc *syscallDescs;
74        const int numSyscallDescs;
75
76        X86Process(ProcessParams * params, ObjectFile *objFile,
77                   SyscallDesc *_syscallDescs, int _numSyscallDescs);
78
79        template<class IntType>
80        void argsInit(int pageSize,
81                      std::vector<AuxVector<IntType> > extraAuxvs);
82
83      public:
84        Addr gdtStart()
85        { return _gdtStart; }
86
87        Addr gdtSize()
88        { return _gdtSize; }
89
90        SyscallDesc* getDesc(int callnum) override;
91
92        void setSyscallReturn(ThreadContext *tc,
93                              SyscallReturn return_value) override;
94        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
95                   Process *process, TheISA::IntReg flags) override;
96
97        X86Process &
98        operator=(const X86Process &in)
99        {
100            if (this == &in)
101                return *this;
102
103            _gdtStart = in._gdtStart;
104            _gdtSize = in._gdtSize;
105            syscallDescs = in.syscallDescs;
106
107            return *this;
108        }
109    };
110
111    class X86_64Process : public X86Process
112    {
113      protected:
114        X86_64Process(ProcessParams *params, ObjectFile *objFile,
115                      SyscallDesc *_syscallDescs, int _numSyscallDescs);
116
117        class VSyscallPage
118        {
119          public:
120            Addr base;
121            Addr size;
122            Addr vtimeOffset;
123            Addr vgettimeofdayOffset;
124
125            VSyscallPage &
126            operator=(const VSyscallPage &in)
127            {
128                if (this == &in)
129                    return *this;
130
131                base = in.base;
132                size = in.size;
133                vtimeOffset = in.vtimeOffset;
134                vgettimeofdayOffset = in.vgettimeofdayOffset;
135
136                return *this;
137            }
138        };
139        VSyscallPage vsyscallPage;
140
141      public:
142        void argsInit(int pageSize);
143        void initState() override;
144
145        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i) override;
146        /// Explicitly import the otherwise hidden getSyscallArg
147        using Process::getSyscallArg;
148        void setSyscallArg(ThreadContext *tc, int i,
149                           X86ISA::IntReg val) override;
150        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
151                   Process *process, TheISA::IntReg flags) override;
152    };
153
154    class I386Process : public X86Process
155    {
156      protected:
157        I386Process(ProcessParams *params, ObjectFile *objFile,
158                    SyscallDesc *_syscallDescs, int _numSyscallDescs);
159
160        class VSyscallPage
161        {
162          public:
163            Addr base;
164            Addr size;
165            Addr vsyscallOffset;
166            Addr vsysexitOffset;
167
168            VSyscallPage &
169            operator=(const VSyscallPage &in)
170            {
171                if (this == &in)
172                    return *this;
173
174                base = in.base;
175                size = in.size;
176                vsyscallOffset = in.vsyscallOffset;
177                vsysexitOffset = in.vsysexitOffset;
178
179                return *this;
180            }
181        };
182        VSyscallPage vsyscallPage;
183
184      public:
185        void argsInit(int pageSize);
186        void initState() override;
187
188        void syscall(int64_t callnum, ThreadContext *tc,
189                     Fault *fault) override;
190        X86ISA::IntReg getSyscallArg(ThreadContext *tc,
191                                     int &i) override;
192        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int &i,
193                                     int width) override;
194        void setSyscallArg(ThreadContext *tc, int i,
195                           X86ISA::IntReg val) override;
196        void clone(ThreadContext *old_tc, ThreadContext *new_tc,
197                   Process *process, TheISA::IntReg flags) override;
198    };
199
200}
201
202#endif // __ARCH_X86_PROCESS_HH__
203