text: /*
   * Copyright (c) 2005 The Regents of The University of Michigan
   * Copyright (c) 2007 MIPS Technologies, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met: redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer;
   * redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution;
   * neither the name of the copyright holders nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Authors: Gabe Black
   *          Korey Sewell
   */
  
  #include "arch/mips/linux/process.hh"
  
  #include "arch/mips/isa_traits.hh"
  #include "arch/mips/linux/linux.hh"
  #include "base/loader/object_file.hh"
  #include "base/trace.hh"
  #include "cpu/thread_context.hh"
  #include "debug/SyscallVerbose.hh"
  #include "kern/linux/linux.hh"
  #include "sim/eventq.hh"
  #include "sim/process.hh"
  #include "sim/syscall_desc.hh"
  #include "sim/syscall_emul.hh"
  #include "sim/system.hh"
  
  using namespace std;
  using namespace MipsISA;
  
  namespace
  {
  
  class MipsLinuxObjectFileLoader : public Process::Loader
  {
    public:
      Process *
      load(ProcessParams *params, ObjectFile *obj_file) override
      {
          if (obj_file->getArch() != ObjectFile::Mips)
              return nullptr;
  
          auto opsys = obj_file->getOpSys();
  
          if (opsys == ObjectFile::UnknownOpSys) {
              warn("Unknown operating system; assuming Linux.");
              opsys = ObjectFile::Linux;
          }
  
          if (opsys != ObjectFile::Linux)
              return nullptr;
  
          return new MipsLinuxProcess(params, obj_file);
      }
  };
  
  MipsLinuxObjectFileLoader loader;
  
  } // anonymous namespace
  
  /// Target uname() handler.
  static SyscallReturn
  unameFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
  {
      int index = 0;
      auto process = tc->getProcessPtr();
      TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, index));
  
      strcpy(name->sysname, "Linux");
      strcpy(name->nodename,"sim.gem5.org");
      strcpy(name->release, process->release.c_str());
      strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003");
      strcpy(name->machine, "mips");
  
      name.copyOut(tc->getVirtProxy());
      return 0;
  }
  
  /// Target sys_getsysyinfo() handler.  Even though this call is
  /// borrowed from Tru64, the subcases that get used appear to be
  /// different in practice from those used by Tru64 processes.
  static SyscallReturn
  sys_getsysinfoFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
  {
      int index = 0;
      auto process = tc->getProcessPtr();
      unsigned op = process->getSyscallArg(tc, index);
      unsigned bufPtr = process->getSyscallArg(tc, index);
      // unsigned nbytes = process->getSyscallArg(tc, index);
  
      switch (op) {
        case 45:
          {
              // GSI_IEEE_FP_CONTROL
              TypedBufferArg<uint64_t> fpcr(bufPtr);
              // I don't think this exactly matches the HW FPCR
              *fpcr = 0;
              fpcr.copyOut(tc->getVirtProxy());
              return 0;
          }
        default:
          cerr << "sys_getsysinfo: unknown op " << op << endl;
          abort();
          break;
      }
  
      return 1;
  }
  
  /// Target sys_setsysinfo() handler.
  static SyscallReturn
  sys_setsysinfoFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
  {
      int index = 0;
      auto process = tc->getProcessPtr();
      unsigned op = process->getSyscallArg(tc, index);
      Addr bufPtr = process->getSyscallArg(tc, index);
      // unsigned nbytes = process->getSyscallArg(tc, index);
  
      switch (op) {
  
        case 14:
          {
              // SSI_IEEE_FP_CONTROL
              TypedBufferArg<uint64_t> fpcr(bufPtr);
              // I don't think this exactly matches the HW FPCR
              fpcr.copyIn(tc->getVirtProxy());
              DPRINTFR(SyscallVerbose, "sys_setsysinfo(SSI_IEEE_FP_CONTROL): "
                     " setting FPCR to 0x%x\n", letoh(*(uint64_t*)fpcr));
              return 0;
          }
        default:
          cerr << "sys_setsysinfo: unknown op " << op << endl;
          abort();
          break;
      }
  
      return 1;
  }
  
  static SyscallReturn
  setThreadAreaFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
  {
      int index = 0;
      auto process = tc->getProcessPtr();
      Addr addr = process->getSyscallArg(tc, index);
      tc->setMiscRegNoEffect(MISCREG_TP_VALUE, addr);
      return 0;
  }
  
  SyscallDesc MipsLinuxProcess::syscallDescs[] = {
      /*  0 */ SyscallDesc("syscall", unimplementedFunc),
      /*  1 */ SyscallDesc("exit", exitFunc),
      /*  2 */ SyscallDesc("fork", unimplementedFunc),
      /*  3 */ SyscallDesc("read", readFunc<MipsLinux>),
      /*  4 */ SyscallDesc("write", writeFunc<MipsLinux>),
      /*  5 */ SyscallDesc("open", openFunc<MipsLinux>),
      /*  6 */ SyscallDesc("close", closeFunc),
      /*  7 */ SyscallDesc("waitpid", unimplementedFunc),
      /*  8 */ SyscallDesc("creat", unimplementedFunc),
      /*  9 */ SyscallDesc("link", unimplementedFunc),
      /* 10 */ SyscallDesc("unlink", unlinkFunc),
      /* 11 */ SyscallDesc("execve", unimplementedFunc),
      /* 12 */ SyscallDesc("chdir", unimplementedFunc),
      /* 13 */ SyscallDesc("time", unimplementedFunc),
      /* 14 */ SyscallDesc("mknod", unimplementedFunc),
      /* 15 */ SyscallDesc("chmod", chmodFunc<MipsLinux>),
      /* 16 */ SyscallDesc("lchown", chownFunc),
      /* 17 */ SyscallDesc("break", brkFunc),
      /* 18 */ SyscallDesc("unused#18", unimplementedFunc),
      /* 19 */ SyscallDesc("lseek", lseekFunc),
      /* 20 */ SyscallDesc("getpid", getpidFunc),
      /* 21 */ SyscallDesc("mount", unimplementedFunc),
      /* 22 */ SyscallDesc("umount", unimplementedFunc),
      /* 23 */ SyscallDesc("setuid", setuidFunc),
      /* 24 */ SyscallDesc("getuid", getuidFunc),
      /* 25 */ SyscallDesc("stime", unimplementedFunc),
      /* 26 */ SyscallDesc("ptrace", unimplementedFunc),
      /* 27 */ SyscallDesc("alarm", unimplementedFunc),
      /* 28 */ SyscallDesc("unused#28", unimplementedFunc),
      /* 29 */ SyscallDesc("pause", unimplementedFunc),
      /* 30 */ SyscallDesc("utime", unimplementedFunc),
      /* 31 */ SyscallDesc("stty", unimplementedFunc),
      /* 32 */ SyscallDesc("gtty", unimplementedFunc),
      /* 33 */ SyscallDesc("access", unimplementedFunc),
      /* 34 */ SyscallDesc("nice", unimplementedFunc),
      /* 35 */ SyscallDesc("ftime", unimplementedFunc),
      /* 36 */ SyscallDesc("sync", unimplementedFunc),
      /* 37 */ SyscallDesc("kill", unimplementedFunc),
      /* 38 */ SyscallDesc("rename", unimplementedFunc),
      /* 39 */ SyscallDesc("mkdir", mkdirFunc),
      /* 40 */ SyscallDesc("rmdir", unimplementedFunc),
      /* 41 */ SyscallDesc("dup", unimplementedFunc),
      /* 42 */ SyscallDesc("pipe", pipePseudoFunc),
      /* 43 */ SyscallDesc("times", unimplementedFunc),
      /* 44 */ SyscallDesc("prof", unimplementedFunc),
      /* 45 */ SyscallDesc("brk", brkFunc),
      /* 46 */ SyscallDesc("setgid", unimplementedFunc),
      /* 47 */ SyscallDesc("getgid", getgidFunc),
      /* 48 */ SyscallDesc("signal", ignoreFunc),
      /* 49 */ SyscallDesc("geteuid", geteuidFunc),
      /* 50 */ SyscallDesc("getegid", getegidFunc),
      /* 51 */ SyscallDesc("acct", unimplementedFunc),
      /* 52 */ SyscallDesc("umount2", unimplementedFunc),
      /* 53 */ SyscallDesc("lock", unimplementedFunc),
      /* 54 */ SyscallDesc("ioctl", ioctlFunc<MipsLinux>),
      /* 55 */ SyscallDesc("fcntl", fcntlFunc),
      /* 56 */ SyscallDesc("mpx", unimplementedFunc),
      /* 57 */ SyscallDesc("setpgid", unimplementedFunc),
      /* 58 */ SyscallDesc("ulimit", unimplementedFunc),
      /* 59 */ SyscallDesc("unused#59", unimplementedFunc),
      /* 60 */ SyscallDesc("umask", umaskFunc),
      /* 61 */ SyscallDesc("chroot", unimplementedFunc),
      /* 62 */ SyscallDesc("ustat", unimplementedFunc),
      /* 63 */ SyscallDesc("dup2", unimplementedFunc),
      /* 64 */ SyscallDesc("getppid", getpagesizeFunc),
      /* 65 */ SyscallDesc("getpgrp", unimplementedFunc),
      /* 66 */ SyscallDesc("setsid", unimplementedFunc),
      /* 67 */ SyscallDesc("sigaction",unimplementedFunc),
      /* 68 */ SyscallDesc("sgetmask", unimplementedFunc),
      /* 69 */ SyscallDesc("ssetmask", unimplementedFunc),
      /* 70 */ SyscallDesc("setreuid", unimplementedFunc),
      /* 71 */ SyscallDesc("setregid", unimplementedFunc),
      /* 72 */ SyscallDesc("sigsuspend", unimplementedFunc),
      /* 73 */ SyscallDesc("sigpending", unimplementedFunc),
      /* 74 */ SyscallDesc("sethostname", ignoreFunc),
      /* 75 */ SyscallDesc("setrlimit", unimplementedFunc),
      /* 76 */ SyscallDesc("getrlimit", unimplementedFunc),
      /* 77 */ SyscallDesc("getrusage", getrusageFunc<MipsLinux>),
      /* 78 */ SyscallDesc("gettimeofday", unimplementedFunc),
      /* 79 */ SyscallDesc("settimeofday", unimplementedFunc),
      /* 80 */ SyscallDesc("getgroups", unimplementedFunc),
      /* 81 */ SyscallDesc("setgroups", unimplementedFunc),
      /* 82 */ SyscallDesc("reserved#82", unimplementedFunc),
      /* 83 */ SyscallDesc("symlink", unimplementedFunc),
      /* 84 */ SyscallDesc("unused#84", unimplementedFunc),
      /* 85 */ SyscallDesc("readlink", readlinkFunc),
      /* 86 */ SyscallDesc("uselib", unimplementedFunc),
      /* 87 */ SyscallDesc("swapon", gethostnameFunc),
      /* 88 */ SyscallDesc("reboot", unimplementedFunc),
      /* 89 */ SyscallDesc("readdir", unimplementedFunc),
      /* 90 */ SyscallDesc("mmap", mmapFunc<MipsLinux>),
      /* 91 */ SyscallDesc("munmap",munmapFunc),
      /* 92 */ SyscallDesc("truncate", truncateFunc),
      /* 93 */ SyscallDesc("ftruncate", ftruncateFunc),
      /* 94 */ SyscallDesc("fchmod", fchmodFunc<MipsLinux>),
      /* 95 */ SyscallDesc("fchown", fchownFunc),
      /* 96 */ SyscallDesc("getpriority", unimplementedFunc),
      /* 97 */ SyscallDesc("setpriority", unimplementedFunc),
      /* 98 */ SyscallDesc("profil", unimplementedFunc),
      /* 99 */ SyscallDesc("statfs", unimplementedFunc),
      /* 100 */ SyscallDesc("fstatfs", unimplementedFunc),
      /* 101 */ SyscallDesc("ioperm", unimplementedFunc),
      /* 102 */ SyscallDesc("socketcall", unimplementedFunc),
      /* 103 */ SyscallDesc("syslog", unimplementedFunc),
      /* 104 */ SyscallDesc("setitimer", unimplementedFunc),
      /* 105 */ SyscallDesc("getitimer", unimplementedFunc),
      /* 106 */ SyscallDesc("stat",  statFunc<MipsLinux>),
      /* 107 */ SyscallDesc("lstat", unimplementedFunc),
      /* 108 */ SyscallDesc("fstat", fstatFunc<MipsLinux>),
      /* 109 */ SyscallDesc("unused#109", unimplementedFunc),
      /* 110 */ SyscallDesc("iopl", unimplementedFunc),
      /* 111 */ SyscallDesc("vhangup", unimplementedFunc),
      /* 112 */ SyscallDesc("idle", ignoreFunc),
      /* 113 */ SyscallDesc("vm86", unimplementedFunc),
      /* 114 */ SyscallDesc("wait4", unimplementedFunc),
      /* 115 */ SyscallDesc("swapoff", unimplementedFunc),
      /* 116 */ SyscallDesc("sysinfo", sysinfoFunc<MipsLinux>),
      /* 117 */ SyscallDesc("ipc", unimplementedFunc),
      /* 118 */ SyscallDesc("fsync", unimplementedFunc),
      /* 119 */ SyscallDesc("sigreturn", unimplementedFunc),
      /* 120 */ SyscallDesc("clone", unimplementedFunc),
      /* 121 */ SyscallDesc("setdomainname", unimplementedFunc),
      /* 122 */ SyscallDesc("uname", unameFunc),
      /* 123 */ SyscallDesc("modify_ldt", unimplementedFunc),
      /* 124 */ SyscallDesc("adjtimex", unimplementedFunc),
      /* 125 */ SyscallDesc("mprotect", ignoreFunc),
      /* 126 */ SyscallDesc("sigprocmask", unimplementedFunc),
      /* 127 */ SyscallDesc("create_module", unimplementedFunc),
      /* 128 */ SyscallDesc("init_module", unimplementedFunc),
      /* 129 */ SyscallDesc("delete_module", unimplementedFunc),
      /* 130 */ SyscallDesc("get_kernel_syms", unimplementedFunc),
      /* 131 */ SyscallDesc("quotactl", unimplementedFunc),
      /* 132 */ SyscallDesc("getpgid", unimplementedFunc),
      /* 133 */ SyscallDesc("fchdir", unimplementedFunc),
      /* 134 */ SyscallDesc("bdflush", unimplementedFunc),
      /* 135 */ SyscallDesc("sysfs", unimplementedFunc),
      /* 136 */ SyscallDesc("personality", unimplementedFunc),
      /* 137 */ SyscallDesc("afs_syscall", unimplementedFunc),
      /* 138 */ SyscallDesc("setfsuid", unimplementedFunc),
      /* 139 */ SyscallDesc("setfsgid", unimplementedFunc),
      /* 140 */ SyscallDesc("llseek", unimplementedFunc),
      /* 141 */ SyscallDesc("getdents", unimplementedFunc),
      /* 142 */ SyscallDesc("newselect", unimplementedFunc),
      /* 143 */ SyscallDesc("flock", unimplementedFunc),
      /* 144 */ SyscallDesc("msync", unimplementedFunc),
      /* 145 */ SyscallDesc("readv", unimplementedFunc),
      /* 146 */ SyscallDesc("writev", writevFunc<MipsLinux>),
      /* 147 */ SyscallDesc("cacheflush", unimplementedFunc),
      /* 148 */ SyscallDesc("cachectl", unimplementedFunc),
      /* 149 */ SyscallDesc("sysmips", unimplementedFunc),
      /* 150 */ SyscallDesc("unused#150", unimplementedFunc),
      /* 151 */ SyscallDesc("getsid", unimplementedFunc),
      /* 152 */ SyscallDesc("fdatasync", unimplementedFunc),
      /* 153 */ SyscallDesc("sysctl", ignoreFunc),
      /* 154 */ SyscallDesc("mlock", unimplementedFunc),
      /* 155 */ SyscallDesc("munlock", unimplementedFunc),
      /* 156 */ SyscallDesc("mlockall", unimplementedFunc),
      /* 157 */ SyscallDesc("munlockall", unimplementedFunc),
      /* 158 */ SyscallDesc("sched_setparam", unimplementedFunc),
      /* 159 */ SyscallDesc("sched_getparam", unimplementedFunc),
      /* 160 */ SyscallDesc("sched_setscheduler", unimplementedFunc),
      /* 161 */ SyscallDesc("sched_getscheduler", unimplementedFunc),
      /* 162 */ SyscallDesc("sched_yield", unimplementedFunc),
      /* 163 */ SyscallDesc("sched_get_prioritymax", unimplementedFunc),
      /* 164 */ SyscallDesc("sched_get_priority_min", unimplementedFunc),
      /* 165 */ SyscallDesc("sched_rr_get_interval", unimplementedFunc),
      /* 166 */ SyscallDesc("nanosleep", unimplementedFunc),
      /* 167 */ SyscallDesc("mremap", mremapFunc<MipsLinux>),
      /* 168 */ SyscallDesc("accept", unimplementedFunc),
      /* 169 */ SyscallDesc("bind", unimplementedFunc),
      /* 170 */ SyscallDesc("connect", unimplementedFunc),
      /* 171 */ SyscallDesc("getpeername", unimplementedFunc),
      /* 172 */ SyscallDesc("getsockname", unimplementedFunc),
      /* 173 */ SyscallDesc("getsockopt", unimplementedFunc),
      /* 174 */ SyscallDesc("listen", unimplementedFunc),
      /* 175 */ SyscallDesc("recv", unimplementedFunc),
      /* 176 */ SyscallDesc("recvmsg", unimplementedFunc),
      /* 177 */ SyscallDesc("send", unimplementedFunc),
      /* 178 */ SyscallDesc("sendmsg", ignoreFunc),
      /* 179 */ SyscallDesc("sendto", unimplementedFunc),
      /* 180 */ SyscallDesc("setsockopt", unimplementedFunc),
      /* 181 */ SyscallDesc("shutdown", unimplementedFunc),
      /* 182 */ SyscallDesc("unknown #182", unimplementedFunc),
      /* 183 */ SyscallDesc("socket", ignoreFunc),
      /* 184 */ SyscallDesc("socketpair", unimplementedFunc),
      /* 185 */ SyscallDesc("setresuid", unimplementedFunc),
      /* 186 */ SyscallDesc("getresuid", unimplementedFunc),
      /* 187 */ SyscallDesc("query_module", unimplementedFunc),
      /* 188 */ SyscallDesc("poll", unimplementedFunc),
      /* 189 */ SyscallDesc("nfsservctl", unimplementedFunc),
      /* 190 */ SyscallDesc("setresgid", unimplementedFunc),
      /* 191 */ SyscallDesc("getresgid", unimplementedFunc),
      /* 192 */ SyscallDesc("prctl", unimplementedFunc),
      /* 193 */ SyscallDesc("rt_sigreturn", unimplementedFunc),
      /* 194 */ SyscallDesc("rt_sigaction", unimplementedFunc),
      /* 195 */ SyscallDesc("rt_sigprocmask", unimplementedFunc),
      /* 196 */ SyscallDesc("rt_sigpending", unimplementedFunc),
      /* 197 */ SyscallDesc("rt_sigtimedwait", unimplementedFunc),
      /* 198 */ SyscallDesc("rt_sigqueueinfo", ignoreFunc),
      /* 199 */ SyscallDesc("rt_sigsuspend", unimplementedFunc),
      /* 200 */ SyscallDesc("pread64", unimplementedFunc),
      /* 201 */ SyscallDesc("pwrite64", unimplementedFunc),
      /* 202 */ SyscallDesc("chown", unimplementedFunc),
      /* 203 */ SyscallDesc("getcwd", getcwdFunc),
      /* 204 */ SyscallDesc("capget", unimplementedFunc),
      /* 205 */ SyscallDesc("capset", unimplementedFunc),
      /* 206 */ SyscallDesc("sigalstack", unimplementedFunc),
      /* 207 */ SyscallDesc("sendfile", unimplementedFunc),
      /* 208 */ SyscallDesc("getpmsg", unimplementedFunc),
      /* 209 */ SyscallDesc("putpmsg", unimplementedFunc),
      /* 210 */ SyscallDesc("mmap2", unimplementedFunc),
      /* 211 */ SyscallDesc("truncate64", unimplementedFunc),
      /* 212 */ SyscallDesc("ftruncate64", unimplementedFunc),
      /* 213 */ SyscallDesc("stat64", unimplementedFunc),
      /* 214 */ SyscallDesc("lstat64", lstat64Func<MipsLinux>),
      /* 215 */ SyscallDesc("fstat64", fstat64Func<MipsLinux>),
      /* 216 */ SyscallDesc("pivot_root", unimplementedFunc),
      /* 217 */ SyscallDesc("mincore", unimplementedFunc),
      /* 218 */ SyscallDesc("madvise", unimplementedFunc),
      /* 219 */ SyscallDesc("getdents64", unimplementedFunc),
      /* 220 */ SyscallDesc("fcntl64", fcntl64Func),
      /* 221 */ SyscallDesc("reserved#221", unimplementedFunc),
      /* 222 */ SyscallDesc("gettid", unimplementedFunc),
      /* 223 */ SyscallDesc("readahead", unimplementedFunc),
      /* 224 */ SyscallDesc("setxattr", unimplementedFunc),
      /* 225 */ SyscallDesc("lsetxattr", unimplementedFunc),
      /* 226 */ SyscallDesc("fsetxattr", unimplementedFunc),
      /* 227 */ SyscallDesc("getxattr", unimplementedFunc),
      /* 228 */ SyscallDesc("lgetxattr", unimplementedFunc),
      /* 229 */ SyscallDesc("fgetxattr", unimplementedFunc),
      /* 230 */ SyscallDesc("listxattr", unimplementedFunc),
      /* 231 */ SyscallDesc("llistxattr", unimplementedFunc),
      /* 232 */ SyscallDesc("flistxattr", unimplementedFunc),
      /* 233 */ SyscallDesc("removexattr", unimplementedFunc),
      /* 234 */ SyscallDesc("lremovexattr", unimplementedFunc),
      /* 235 */ SyscallDesc("fremovexattr", ignoreFunc),
      /* 236 */ SyscallDesc("tkill", unimplementedFunc),
      /* 237 */ SyscallDesc("sendfile64", unimplementedFunc),
      /* 238 */ SyscallDesc("futex", unimplementedFunc),
      /* 239 */ SyscallDesc("sched_setaffinity", unimplementedFunc),
      /* 240 */ SyscallDesc("sched_getaffinity", unimplementedFunc),
      /* 241 */ SyscallDesc("io_setup", unimplementedFunc),
      /* 242 */ SyscallDesc("io_destroy", unimplementedFunc),
      /* 243 */ SyscallDesc("io_getevents", unimplementedFunc),
      /* 244 */ SyscallDesc("io_submit", unimplementedFunc),
      /* 245 */ SyscallDesc("io_cancel", unimplementedFunc),
      /* 246 */ SyscallDesc("exit_group", exitFunc),
      /* 247 */ SyscallDesc("lookup_dcookie", unimplementedFunc),
      /* 248 */ SyscallDesc("epoll_create", unimplementedFunc),
      /* 249 */ SyscallDesc("epoll_ctl", unimplementedFunc),
      /* 250 */ SyscallDesc("epoll_wait", unimplementedFunc),
      /* 251 */ SyscallDesc("remap_file_pages", unimplementedFunc),
      /* 252 */ SyscallDesc("set_tid_address", unimplementedFunc),
      /* 253 */ SyscallDesc("restart_syscall", unimplementedFunc),
      /* 254 */ SyscallDesc("fadvise64", unimplementedFunc),
      /* 255 */ SyscallDesc("statfs64", unimplementedFunc),
      /* 256 */ SyscallDesc("fstafs64", unimplementedFunc),
      /* 257 */ SyscallDesc("timer_create", sys_getsysinfoFunc),
      /* 258 */ SyscallDesc("timer_settime", sys_setsysinfoFunc),
      /* 259 */ SyscallDesc("timer_gettime", unimplementedFunc),
      /* 260 */ SyscallDesc("timer_getoverrun", unimplementedFunc),
      /* 261 */ SyscallDesc("timer_delete", unimplementedFunc),
      /* 262 */ SyscallDesc("clock_settime", unimplementedFunc),
      /* 263 */ SyscallDesc("clock_gettime", unimplementedFunc),
      /* 264 */ SyscallDesc("clock_getres", unimplementedFunc),
      /* 265 */ SyscallDesc("clock_nanosleep", unimplementedFunc),
      /* 266 */ SyscallDesc("tgkill", unimplementedFunc),
      /* 267 */ SyscallDesc("utimes", unimplementedFunc),
      /* 268 */ SyscallDesc("mbind", unimplementedFunc),
      /* 269 */ SyscallDesc("get_mempolicy", unimplementedFunc),
      /* 270 */ SyscallDesc("set_mempolicy", unimplementedFunc),
      /* 271 */ SyscallDesc("mq_open", unimplementedFunc),
      /* 272 */ SyscallDesc("mq_unlink", unimplementedFunc),
      /* 273 */ SyscallDesc("mq_timedsend", unimplementedFunc),
      /* 274 */ SyscallDesc("mq_timedreceive", unimplementedFunc),
      /* 275 */ SyscallDesc("mq_notify", unimplementedFunc),
      /* 276 */ SyscallDesc("mq_getsetattr", unimplementedFunc),
      /* 277 */ SyscallDesc("vserver", unimplementedFunc),
      /* 278 */ SyscallDesc("waitid", unimplementedFunc),
      /* 279 */ SyscallDesc("unknown #279", unimplementedFunc),
      /* 280 */ SyscallDesc("add_key", unimplementedFunc),
      /* 281 */ SyscallDesc("request_key", unimplementedFunc),
      /* 282 */ SyscallDesc("keyctl", unimplementedFunc),
      /* 283 */ SyscallDesc("set_thread_area", setThreadAreaFunc),
      /* 284 */ SyscallDesc("inotify_init", unimplementedFunc),
      /* 285 */ SyscallDesc("inotify_add_watch", unimplementedFunc),
      /* 286 */ SyscallDesc("inotify_rm_watch", unimplementedFunc),
      /* 287 */ SyscallDesc("migrate_pages", unimplementedFunc),
      /* 288 */ SyscallDesc("openat", unimplementedFunc),
      /* 289 */ SyscallDesc("mkdirat", unimplementedFunc),
      /* 290 */ SyscallDesc("mknodat", unimplementedFunc),
      /* 291 */ SyscallDesc("fchownat", unimplementedFunc),
      /* 292 */ SyscallDesc("futimesat", unimplementedFunc),
      /* 293 */ SyscallDesc("fstatat64", unimplementedFunc),
      /* 294 */ SyscallDesc("unlinkat", unimplementedFunc),
      /* 295 */ SyscallDesc("renameat", unimplementedFunc),
      /* 296 */ SyscallDesc("linkat", unimplementedFunc),
      /* 297 */ SyscallDesc("symlinkat", unimplementedFunc),
      /* 298 */ SyscallDesc("readlinkat", unimplementedFunc),
      /* 299 */ SyscallDesc("fchmodat", unimplementedFunc),
      /* 300 */ SyscallDesc("faccessat", unimplementedFunc),
      /* 301 */ SyscallDesc("pselect6", unimplementedFunc),
      /* 302 */ SyscallDesc("ppoll", unimplementedFunc),
      /* 303 */ SyscallDesc("unshare", unimplementedFunc),
      /* 304 */ SyscallDesc("splice", unimplementedFunc),
      /* 305 */ SyscallDesc("sync_file_range", unimplementedFunc),
      /* 306 */ SyscallDesc("tee", unimplementedFunc),
      /* 307 */ SyscallDesc("vmsplice", unimplementedFunc),
      /* 308 */ SyscallDesc("move_pages", unimplementedFunc),
      /* 309 */ SyscallDesc("set_robust_list", unimplementedFunc),
      /* 310 */ SyscallDesc("get_robust_list", unimplementedFunc),
      /* 311 */ SyscallDesc("kexec_load", unimplementedFunc),
      /* 312 */ SyscallDesc("getcpu", unimplementedFunc),
      /* 313 */ SyscallDesc("epoll_pwait", unimplementedFunc),
      /* 314 */ SyscallDesc("ioprio_set", unimplementedFunc),
      /* 315 */ SyscallDesc("ioprio_get", unimplementedFunc),
      /* 316 */ SyscallDesc("utimensat", unimplementedFunc),
      /* 317 */ SyscallDesc("signalfd", unimplementedFunc),
      /* 318 */ SyscallDesc("timerfd", unimplementedFunc),
      /* 319 */ SyscallDesc("eventfd", unimplementedFunc)
  };
  
  MipsLinuxProcess::MipsLinuxProcess(ProcessParams * params,
                                     ObjectFile *objFile)
      : MipsProcess(params, objFile),
        Num_Syscall_Descs(sizeof(syscallDescs) / sizeof(SyscallDesc))
  {  }
  
  SyscallDesc*
  MipsLinuxProcess::getDesc(int callnum)
  {
      //MIPS32 syscalls are in the range of 4000 - 4999
      int m5_sys_idx = callnum - 4000;
  
      if (m5_sys_idx < 0 || m5_sys_idx >= Num_Syscall_Descs)
          return NULL;
  
      return &syscallDescs[m5_sys_idx];
  }
  
  void
  MipsLinuxProcess::syscall(ThreadContext *tc, Fault *fault)
  {
      doSyscall(tc->readIntReg(2), tc, fault);
  }
  