operatingsystem.hh revision 5543:3af77710f397 
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 "config/full_system.hh"
35
36#include <inttypes.h>
37
38#if FULL_SYSTEM
39
40class OperatingSystem {};
41
42#else //!FULL_SYSTEM
43
44/// This struct is used to build an target-OS-dependent table that
45/// maps the target's open() flags to the host open() flags.
46struct OpenFlagTransTable {
47    int tgtFlag;        //!< Target system flag value.
48    int hostFlag;       //!< Corresponding host system flag value.
49};
50
51
52///
53/// This class encapsulates the types, structures, constants,
54/// functions, and syscall-number mappings specific to an operating system
55/// syscall interface.
56///
57class OperatingSystem {
58
59  public:
60
61    /// Stat buffer.  Note that we can't call it 'stat' since that
62    /// gets #defined to something else on some systems. This type
63    /// can be specialized by architecture specific "Linux" classes
64    typedef void tgt_stat;
65
66    // same for stat64
67    typedef void tgt_stat64;
68
69    /// Length of strings in struct utsname (plus 1 for null char).
70    static const int _SYS_NMLN = 65;
71
72    /// Interface struct for uname().
73    typedef struct {
74        char sysname[_SYS_NMLN];        //!< System name.
75        char nodename[_SYS_NMLN];       //!< Node name.
76        char release[_SYS_NMLN];        //!< OS release.
77        char version[_SYS_NMLN];        //!< OS version.
78        char machine[_SYS_NMLN];        //!< Machine type.
79    } utsname;
80
81    /// Limit struct for getrlimit/setrlimit.
82    typedef struct {
83        uint64_t  rlim_cur;     //!< soft limit
84        uint64_t  rlim_max;     //!< hard limit
85    } rlimit;
86
87    /// For gettimeofday().
88    typedef struct {
89        int64_t tv_sec;         //!< seconds
90        int64_t tv_usec;        //!< microseconds
91    } timeval;
92
93    // For writev/readv
94    typedef struct {
95        uint64_t iov_base; // void *
96        uint64_t iov_len;
97    } tgt_iovec;
98
99
100    /// For getrusage().
101    typedef struct {
102        timeval ru_utime;       //!< user time used
103        timeval ru_stime;       //!< system time used
104        int64_t ru_maxrss;              //!< max rss
105        int64_t ru_ixrss;               //!< integral shared memory size
106        int64_t ru_idrss;               //!< integral unshared data "
107        int64_t ru_isrss;               //!< integral unshared stack "
108        int64_t ru_minflt;              //!< page reclaims - total vmfaults
109        int64_t ru_majflt;              //!< page faults
110        int64_t ru_nswap;               //!< swaps
111        int64_t ru_inblock;             //!< block input operations
112        int64_t ru_oublock;             //!< block output operations
113        int64_t ru_msgsnd;              //!< messages sent
114        int64_t ru_msgrcv;              //!< messages received
115        int64_t ru_nsignals;            //!< signals received
116        int64_t ru_nvcsw;               //!< voluntary context switches
117        int64_t ru_nivcsw;              //!< involuntary "
118    } rusage;
119
120};  // class OperatingSystem
121
122
123#endif // FULL_SYSTEM
124
125#endif // __OPERATINGSYSTEM_HH__
126