operatingsystem.hh revision 6215:9aed64c9f10f 
1/*
2 * Copyright (c) 2004-2005 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: Gabe Black
29 */
30
31#ifndef __KERN_OPERATINGSYSTEM_HH__
32#define __KERN_OPERATINGSYSTEM_HH__
33
34#include "base/types.hh"
35#include "config/full_system.hh"
36
37#if FULL_SYSTEM
38
39class OperatingSystem {};
40
41#else //!FULL_SYSTEM
42#include <string>
43
44class LiveProcess;
45class ThreadContext;
46
47/// This struct is used to build an target-OS-dependent table that
48/// maps the target's open() flags to the host open() flags.
49struct OpenFlagTransTable {
50    int tgtFlag;        //!< Target system flag value.
51    int hostFlag;       //!< Corresponding host system flag value.
52};
53
54
55///
56/// This class encapsulates the types, structures, constants,
57/// functions, and syscall-number mappings specific to an operating system
58/// syscall interface.
59///
60class OperatingSystem {
61
62  public:
63
64    /// Stat buffer.  Note that we can't call it 'stat' since that
65    /// gets #defined to something else on some systems. This type
66    /// can be specialized by architecture specific "Linux" classes
67    typedef void tgt_stat;
68
69    // same for stat64
70    typedef void tgt_stat64;
71
72    /// Length of strings in struct utsname (plus 1 for null char).
73    static const int _SYS_NMLN = 65;
74
75    /// Interface struct for uname().
76    typedef struct {
77        char sysname[_SYS_NMLN];        //!< System name.
78        char nodename[_SYS_NMLN];       //!< Node name.
79        char release[_SYS_NMLN];        //!< OS release.
80        char version[_SYS_NMLN];        //!< OS version.
81        char machine[_SYS_NMLN];        //!< Machine type.
82    } utsname;
83
84    /// Limit struct for getrlimit/setrlimit.
85    typedef struct {
86        uint64_t  rlim_cur;     //!< soft limit
87        uint64_t  rlim_max;     //!< hard limit
88    } rlimit;
89
90    /// For gettimeofday().
91    typedef struct {
92        int64_t tv_sec;         //!< seconds
93        int64_t tv_usec;        //!< microseconds
94    } timeval;
95
96    // For writev/readv
97    typedef struct {
98        uint64_t iov_base; // void *
99        uint64_t iov_len;
100    } tgt_iovec;
101
102
103    /// For getrusage().
104    typedef struct {
105        timeval ru_utime;       //!< user time used
106        timeval ru_stime;       //!< system time used
107        int64_t ru_maxrss;              //!< max rss
108        int64_t ru_ixrss;               //!< integral shared memory size
109        int64_t ru_idrss;               //!< integral unshared data "
110        int64_t ru_isrss;               //!< integral unshared stack "
111        int64_t ru_minflt;              //!< page reclaims - total vmfaults
112        int64_t ru_majflt;              //!< page faults
113        int64_t ru_nswap;               //!< swaps
114        int64_t ru_inblock;             //!< block input operations
115        int64_t ru_oublock;             //!< block output operations
116        int64_t ru_msgsnd;              //!< messages sent
117        int64_t ru_msgrcv;              //!< messages received
118        int64_t ru_nsignals;            //!< signals received
119        int64_t ru_nvcsw;               //!< voluntary context switches
120        int64_t ru_nivcsw;              //!< involuntary "
121    } rusage;
122
123    static int openSpecialFile(std::string path, LiveProcess *process, ThreadContext *tc);
124
125};  // class OperatingSystem
126
127
128#endif // FULL_SYSTEM
129
130#endif // __OPERATINGSYSTEM_HH__
131