linux.hh revision 11907
1/* 2 * Copyright (c) 2004-2009 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: Ali Saidi 29 */ 30 31#ifndef __LINUX_HH__ 32#define __LINUX_HH__ 33 34#include "base/types.hh" 35 36#include <string> 37 38#include "kern/operatingsystem.hh" 39#include "sim/process.hh" 40 41class ThreadContext; 42 43/// 44/// This class encapsulates the types, structures, constants, 45/// functions, and syscall-number mappings specific to the Alpha Linux 46/// syscall interface. 47/// 48class Linux : public OperatingSystem 49{ 50 51 public: 52 53 //@{ 54 /// Basic Linux types. 55 typedef uint64_t size_t; 56 typedef uint64_t off_t; 57 typedef int64_t time_t; 58 typedef int64_t clock_t; 59 typedef uint32_t uid_t; 60 typedef uint32_t gid_t; 61 //@} 62 63 /// Stat buffer. Note that we can't call it 'stat' since that 64 /// gets #defined to something else on some systems. This type 65 /// can be specialized by architecture specific "Linux" classes 66 typedef struct { 67 uint32_t st_dev; //!< device 68 uint32_t st_ino; //!< inode 69 uint32_t st_mode; //!< mode 70 uint32_t st_nlink; //!< link count 71 uint32_t st_uid; //!< owner's user ID 72 uint32_t st_gid; //!< owner's group ID 73 uint32_t st_rdev; //!< device number 74 int32_t _pad1; //!< for alignment 75 int64_t st_size; //!< file size in bytes 76 uint64_t st_atimeX; //!< time of last access 77 uint64_t st_mtimeX; //!< time of last modification 78 uint64_t st_ctimeX; //!< time of last status change 79 uint32_t st_blksize; //!< optimal I/O block size 80 int32_t st_blocks; //!< number of blocks allocated 81 uint32_t st_flags; //!< flags 82 uint32_t st_gen; //!< unknown 83 } tgt_stat; 84 85 // same for stat64 86 typedef struct { 87 uint64_t st_dev; 88 uint64_t st_ino; 89 uint64_t st_rdev; 90 int64_t st_size; 91 uint64_t st_blocks; 92 93 uint32_t st_mode; 94 uint32_t st_uid; 95 uint32_t st_gid; 96 uint32_t st_blksize; 97 uint32_t st_nlink; 98 uint32_t __pad0; 99 100 uint64_t st_atimeX; 101 uint64_t st_atime_nsec; 102 uint64_t st_mtimeX; 103 uint64_t st_mtime_nsec; 104 uint64_t st_ctimeX; 105 uint64_t st_ctime_nsec; 106 int64_t ___unused[3]; 107 } tgt_stat64; 108 109 /// Length of strings in struct utsname (plus 1 for null char). 110 static const int _SYS_NMLN = 65; 111 112 /// Interface struct for uname(). 113 struct utsname { 114 char sysname[_SYS_NMLN]; //!< System name. 115 char nodename[_SYS_NMLN]; //!< Node name. 116 char release[_SYS_NMLN]; //!< OS release. 117 char version[_SYS_NMLN]; //!< OS version. 118 char machine[_SYS_NMLN]; //!< Machine type. 119 }; 120 121 /// Limit struct for getrlimit/setrlimit. 122 struct rlimit { 123 uint64_t rlim_cur; //!< soft limit 124 uint64_t rlim_max; //!< hard limit 125 }; 126 127 /// For gettimeofday(). 128 struct timeval { 129 int64_t tv_sec; //!< seconds 130 int64_t tv_usec; //!< microseconds 131 }; 132 133 /// For clock_gettime(). 134 struct timespec { 135 time_t tv_sec; //!< seconds 136 int64_t tv_nsec; //!< nanoseconds 137 }; 138 139 /// Clock ticks per second, for times(). 140 static const int M5_SC_CLK_TCK = 100; 141 142 /// For times(). 143 struct tms { 144 int64_t tms_utime; //!< user time 145 int64_t tms_stime; //!< system time 146 int64_t tms_cutime; //!< user time of children 147 int64_t tms_cstime; //!< system time of children 148 }; 149 150 // For writev/readv 151 struct tgt_iovec { 152 uint64_t iov_base; // void * 153 uint64_t iov_len; 154 }; 155 156 //@{ 157 /// ioctl() command codes. 158 static const unsigned TGT_TCGETS = 0x5401; 159 static const unsigned TGT_TCGETA = 0x5405; 160 static const unsigned TGT_TCSETAW = 0x5407; 161 static const unsigned TGT_FIONREAD = 0x541B; 162 //@} 163 164 /// Return true for the ioctl codes for which we return ENOTTY 165 /// *without* printing a warning, since we know that ENOTTY is the 166 /// correct thing to return (and not just a sign that we don't 167 /// recognize the ioctl code. 168 static bool 169 isTtyReq(unsigned req) 170 { 171 switch (req) { 172 case TGT_FIONREAD: 173 case TGT_TCSETAW: 174 case TGT_TCGETS: 175 case TGT_TCGETA: 176 return true; 177 default: 178 return false; 179 } 180 } 181 182 183 /// Resource constants for getrlimit(). 184 static const unsigned TGT_RLIMIT_CPU = 0; 185 static const unsigned TGT_RLIMIT_FSIZE = 1; 186 static const unsigned TGT_RLIMIT_DATA = 2; 187 static const unsigned TGT_RLIMIT_STACK = 3; 188 static const unsigned TGT_RLIMIT_CORE = 4; 189 static const unsigned TGT_RLIMIT_RSS = 5; 190 static const unsigned TGT_RLIMIT_NPROC = 6; 191 static const unsigned TGT_RLIMIT_NOFILE = 7; 192 static const unsigned TGT_RLIMIT_MEMLOCK = 8; 193 static const unsigned TGT_RLIMIT_AS = 9; 194 static const unsigned TGT_RLIMIT_LOCKS = 10; 195 static const unsigned TGT_RLIMIT_SIGPENDING = 11; 196 static const unsigned TGT_RLIMIT_MSGQUEUE = 12; 197 static const unsigned TGT_RLIMIT_NICE = 13; 198 static const unsigned TGT_RLIMIT_RTPRIO = 14; 199 static const unsigned TGT_RLIMIT_RTTIME = 15; 200 static const unsigned TGT_RLIM_NLIMITS = 16; 201 202 /// For getrusage(). 203 static const int TGT_RUSAGE_SELF = 0; 204 static const int TGT_RUSAGE_CHILDREN = -1; 205 static const int TGT_RUSAGE_BOTH = -2; 206 207 struct rusage { 208 struct timeval ru_utime; //!< user time used 209 struct timeval ru_stime; //!< system time used 210 int64_t ru_maxrss; //!< max rss 211 int64_t ru_ixrss; //!< integral shared memory size 212 int64_t ru_idrss; //!< integral unshared data " 213 int64_t ru_isrss; //!< integral unshared stack " 214 int64_t ru_minflt; //!< page reclaims - total vmfaults 215 int64_t ru_majflt; //!< page faults 216 int64_t ru_nswap; //!< swaps 217 int64_t ru_inblock; //!< block input operations 218 int64_t ru_oublock; //!< block output operations 219 int64_t ru_msgsnd; //!< messages sent 220 int64_t ru_msgrcv; //!< messages received 221 int64_t ru_nsignals; //!< signals received 222 int64_t ru_nvcsw; //!< voluntary context switches 223 int64_t ru_nivcsw; //!< involuntary " 224 }; 225 226 static int openSpecialFile(std::string path, Process *process, 227 ThreadContext *tc); 228 static std::string procMeminfo(Process *process, ThreadContext *tc); 229 static std::string etcPasswd(Process *process, ThreadContext *tc); 230 231 // For futex system call 232 static const unsigned TGT_FUTEX_WAIT = 0; 233 static const unsigned TGT_FUTEX_WAKE = 1; 234 static const unsigned TGT_EAGAIN = 11; 235 static const unsigned TGT_EWOULDBLOCK = TGT_EAGAIN; 236 static const unsigned TGT_FUTEX_PRIVATE_FLAG = 128; 237 238 // for *at syscalls 239 static const int TGT_AT_FDCWD = -100; 240 241 // for MREMAP 242 static const unsigned TGT_MREMAP_MAYMOVE = 0x1; 243 static const unsigned TGT_MREMAP_FIXED = 0x2; 244 245 static const unsigned TGT_CLONE_VM = 0x00000100; 246 static const unsigned TGT_CLONE_FS = 0x00000200; 247 static const unsigned TGT_CLONE_FILES = 0x00000400; 248 static const unsigned TGT_CLONE_SIGHAND = 0x00000800; 249 static const unsigned TGT_CLONE_PTRACE = 0x00002000; 250 static const unsigned TGT_CLONE_VFORK = 0x00004000; 251 static const unsigned TGT_CLONE_PARENT = 0x00008000; 252 static const unsigned TGT_CLONE_THREAD = 0x00010000; 253 static const unsigned TGT_CLONE_NEWNS = 0x00020000; 254 static const unsigned TGT_CLONE_SYSVSEM = 0x00040000; 255 static const unsigned TGT_CLONE_SETTLS = 0x00080000; 256 static const unsigned TGT_CLONE_PARENT_SETTID = 0x00100000; 257 static const unsigned TGT_CLONE_CHILD_CLEARTID = 0x00200000; 258 static const unsigned TGT_CLONE_DETACHED = 0x00400000; 259 static const unsigned TGT_CLONE_UNTRACED = 0x00800000; 260 static const unsigned TGT_CLONE_CHILD_SETTID = 0x01000000; 261 static const unsigned TGT_CLONE_NEWUTS = 0x04000000; 262 static const unsigned TGT_CLONE_NEWIPC = 0x08000000; 263 static const unsigned TGT_CLONE_NEWUSER = 0x10000000; 264 static const unsigned TGT_CLONE_NEWPID = 0x20000000; 265 static const unsigned TGT_CLONE_NEWNET = 0x40000000; 266 static const unsigned TGT_CLONE_IO = 0x80000000; 267}; // class Linux 268 269#endif // __LINUX_HH__ 270