src/arch/mips/linux/process.cc - public/gem5 - Git at Google

 /*
  * 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;
 }

 SyscallDescABI<DefaultSyscallABI> MipsLinuxProcess::syscallDescs[] = {
     /*  0 */ { "syscall" },
     /*  1 */ { "exit", exitFunc },
     /*  2 */ { "fork" },
     /*  3 */ { "read", readFunc<MipsLinux> },
     /*  4 */ { "write", writeFunc<MipsLinux> },
     /*  5 */ { "open", openFunc<MipsLinux> },
     /*  6 */ { "close", closeFunc },
     /*  7 */ { "waitpid" },
     /*  8 */ { "creat" },
     /*  9 */ { "link" },
     /* 10 */ { "unlink", unlinkFunc },
     /* 11 */ { "execve" },
     /* 12 */ { "chdir" },
     /* 13 */ { "time" },
     /* 14 */ { "mknod" },
     /* 15 */ { "chmod", chmodFunc<MipsLinux> },
     /* 16 */ { "lchown", chownFunc },
     /* 17 */ { "break", brkFunc },
     /* 18 */ { "unused#18" },
     /* 19 */ { "lseek", lseekFunc },
     /* 20 */ { "getpid", getpidFunc },
     /* 21 */ { "mount" },
     /* 22 */ { "umount" },
     /* 23 */ { "setuid", ignoreFunc },
     /* 24 */ { "getuid", getuidFunc },
     /* 25 */ { "stime" },
     /* 26 */ { "ptrace" },
     /* 27 */ { "alarm" },
     /* 28 */ { "unused#28" },
     /* 29 */ { "pause" },
     /* 30 */ { "utime" },
     /* 31 */ { "stty" },
     /* 32 */ { "gtty" },
     /* 33 */ { "access" },
     /* 34 */ { "nice" },
     /* 35 */ { "ftime" },
     /* 36 */ { "sync" },
     /* 37 */ { "kill" },
     /* 38 */ { "rename" },
     /* 39 */ { "mkdir", mkdirFunc },
     /* 40 */ { "rmdir" },
     /* 41 */ { "dup" },
     /* 42 */ { "pipe", pipePseudoFunc },
     /* 43 */ { "times" },
     /* 44 */ { "prof" },
     /* 45 */ { "brk", brkFunc },
     /* 46 */ { "setgid" },
     /* 47 */ { "getgid", getgidFunc },
     /* 48 */ { "signal", ignoreFunc },
     /* 49 */ { "geteuid", geteuidFunc },
     /* 50 */ { "getegid", getegidFunc },
     /* 51 */ { "acct" },
     /* 52 */ { "umount2" },
     /* 53 */ { "lock" },
     /* 54 */ { "ioctl", ioctlFunc<MipsLinux> },
     /* 55 */ { "fcntl", fcntlFunc },
     /* 56 */ { "mpx" },
     /* 57 */ { "setpgid" },
     /* 58 */ { "ulimit" },
     /* 59 */ { "unused#59" },
     /* 60 */ { "umask", umaskFunc },
     /* 61 */ { "chroot" },
     /* 62 */ { "ustat" },
     /* 63 */ { "dup2" },
     /* 64 */ { "getppid", getpagesizeFunc },
     /* 65 */ { "getpgrp" },
     /* 66 */ { "setsid" },
     /* 67 */ { "sigaction" },
     /* 68 */ { "sgetmask" },
     /* 69 */ { "ssetmask" },
     /* 70 */ { "setreuid" },
     /* 71 */ { "setregid" },
     /* 72 */ { "sigsuspend" },
     /* 73 */ { "sigpending" },
     /* 74 */ { "sethostname", ignoreFunc },
     /* 75 */ { "setrlimit" },
     /* 76 */ { "getrlimit" },
     /* 77 */ { "getrusage", getrusageFunc<MipsLinux> },
     /* 78 */ { "gettimeofday" },
     /* 79 */ { "settimeofday" },
     /* 80 */ { "getgroups" },
     /* 81 */ { "setgroups" },
     /* 82 */ { "reserved#82" },
     /* 83 */ { "symlink" },
     /* 84 */ { "unused#84" },
     /* 85 */ { "readlink", readlinkFunc },
     /* 86 */ { "uselib" },
     /* 87 */ { "swapon", gethostnameFunc },
     /* 88 */ { "reboot" },
     /* 89 */ { "readdir" },
     /* 90 */ { "mmap", mmapFunc<MipsLinux> },
     /* 91 */ { "munmap",munmapFunc },
     /* 92 */ { "truncate", truncateFunc },
     /* 93 */ { "ftruncate", ftruncateFunc },
     /* 94 */ { "fchmod", fchmodFunc<MipsLinux> },
     /* 95 */ { "fchown", fchownFunc },
     /* 96 */ { "getpriority" },
     /* 97 */ { "setpriority" },
     /* 98 */ { "profil" },
     /* 99 */ { "statfs" },
     /* 100 */ { "fstatfs" },
     /* 101 */ { "ioperm" },
     /* 102 */ { "socketcall" },
     /* 103 */ { "syslog" },
     /* 104 */ { "setitimer" },
     /* 105 */ { "getitimer" },
     /* 106 */ { "stat",  statFunc<MipsLinux> },
     /* 107 */ { "lstat" },
     /* 108 */ { "fstat", fstatFunc<MipsLinux> },
     /* 109 */ { "unused#109" },
     /* 110 */ { "iopl" },
     /* 111 */ { "vhangup" },
     /* 112 */ { "idle", ignoreFunc },
     /* 113 */ { "vm86" },
     /* 114 */ { "wait4" },
     /* 115 */ { "swapoff" },
     /* 116 */ { "sysinfo", sysinfoFunc<MipsLinux> },
     /* 117 */ { "ipc" },
     /* 118 */ { "fsync" },
     /* 119 */ { "sigreturn" },
     /* 120 */ { "clone" },
     /* 121 */ { "setdomainname" },
     /* 122 */ { "uname", unameFunc },
     /* 123 */ { "modify_ldt" },
     /* 124 */ { "adjtimex" },
     /* 125 */ { "mprotect", ignoreFunc },
     /* 126 */ { "sigprocmask" },
     /* 127 */ { "create_module" },
     /* 128 */ { "init_module" },
     /* 129 */ { "delete_module" },
     /* 130 */ { "get_kernel_syms" },
     /* 131 */ { "quotactl" },
     /* 132 */ { "getpgid" },
     /* 133 */ { "fchdir" },
     /* 134 */ { "bdflush" },
     /* 135 */ { "sysfs" },
     /* 136 */ { "personality" },
     /* 137 */ { "afs_syscall" },
     /* 138 */ { "setfsuid" },
     /* 139 */ { "setfsgid" },
     /* 140 */ { "llseek" },
     /* 141 */ { "getdents" },
     /* 142 */ { "newselect" },
     /* 143 */ { "flock" },
     /* 144 */ { "msync" },
     /* 145 */ { "readv" },
     /* 146 */ { "writev", writevFunc<MipsLinux> },
     /* 147 */ { "cacheflush" },
     /* 148 */ { "cachectl" },
     /* 149 */ { "sysmips" },
     /* 150 */ { "unused#150" },
     /* 151 */ { "getsid" },
     /* 152 */ { "fdatasync" },
     /* 153 */ { "sysctl", ignoreFunc },
     /* 154 */ { "mlock" },
     /* 155 */ { "munlock" },
     /* 156 */ { "mlockall" },
     /* 157 */ { "munlockall" },
     /* 158 */ { "sched_setparam" },
     /* 159 */ { "sched_getparam" },
     /* 160 */ { "sched_setscheduler" },
     /* 161 */ { "sched_getscheduler" },
     /* 162 */ { "sched_yield" },
     /* 163 */ { "sched_get_prioritymax" },
     /* 164 */ { "sched_get_priority_min" },
     /* 165 */ { "sched_rr_get_interval" },
     /* 166 */ { "nanosleep" },
     /* 167 */ { "mremap", mremapFunc<MipsLinux> },
     /* 168 */ { "accept" },
     /* 169 */ { "bind" },
     /* 170 */ { "connect" },
     /* 171 */ { "getpeername" },
     /* 172 */ { "getsockname" },
     /* 173 */ { "getsockopt" },
     /* 174 */ { "listen" },
     /* 175 */ { "recv" },
     /* 176 */ { "recvmsg" },
     /* 177 */ { "send" },
     /* 178 */ { "sendmsg", ignoreFunc },
     /* 179 */ { "sendto" },
     /* 180 */ { "setsockopt" },
     /* 181 */ { "shutdown" },
     /* 182 */ { "unknown #182" },
     /* 183 */ { "socket", ignoreFunc },
     /* 184 */ { "socketpair" },
     /* 185 */ { "setresuid" },
     /* 186 */ { "getresuid" },
     /* 187 */ { "query_module" },
     /* 188 */ { "poll" },
     /* 189 */ { "nfsservctl" },
     /* 190 */ { "setresgid" },
     /* 191 */ { "getresgid" },
     /* 192 */ { "prctl" },
     /* 193 */ { "rt_sigreturn" },
     /* 194 */ { "rt_sigaction" },
     /* 195 */ { "rt_sigprocmask" },
     /* 196 */ { "rt_sigpending" },
     /* 197 */ { "rt_sigtimedwait" },
     /* 198 */ { "rt_sigqueueinfo", ignoreFunc },
     /* 199 */ { "rt_sigsuspend" },
     /* 200 */ { "pread64" },
     /* 201 */ { "pwrite64" },
     /* 202 */ { "chown" },
     /* 203 */ { "getcwd", getcwdFunc },
     /* 204 */ { "capget" },
     /* 205 */ { "capset" },
     /* 206 */ { "sigalstack" },
     /* 207 */ { "sendfile" },
     /* 208 */ { "getpmsg" },
     /* 209 */ { "putpmsg" },
     /* 210 */ { "mmap2" },
     /* 211 */ { "truncate64" },
     /* 212 */ { "ftruncate64" },
     /* 213 */ { "stat64" },
     /* 214 */ { "lstat64", lstat64Func<MipsLinux> },
     /* 215 */ { "fstat64", fstat64Func<MipsLinux> },
     /* 216 */ { "pivot_root" },
     /* 217 */ { "mincore" },
     /* 218 */ { "madvise" },
     /* 219 */ { "getdents64" },
     /* 220 */ { "fcntl64", fcntl64Func },
     /* 221 */ { "reserved#221" },
     /* 222 */ { "gettid" },
     /* 223 */ { "readahead" },
     /* 224 */ { "setxattr" },
     /* 225 */ { "lsetxattr" },
     /* 226 */ { "fsetxattr" },
     /* 227 */ { "getxattr" },
     /* 228 */ { "lgetxattr" },
     /* 229 */ { "fgetxattr" },
     /* 230 */ { "listxattr" },
     /* 231 */ { "llistxattr" },
     /* 232 */ { "flistxattr" },
     /* 233 */ { "removexattr" },
     /* 234 */ { "lremovexattr" },
     /* 235 */ { "fremovexattr", ignoreFunc },
     /* 236 */ { "tkill" },
     /* 237 */ { "sendfile64" },
     /* 238 */ { "futex" },
     /* 239 */ { "sched_setaffinity" },
     /* 240 */ { "sched_getaffinity" },
     /* 241 */ { "io_setup" },
     /* 242 */ { "io_destroy" },
     /* 243 */ { "io_getevents" },
     /* 244 */ { "io_submit" },
     /* 245 */ { "io_cancel" },
     /* 246 */ { "exit_group", exitFunc },
     /* 247 */ { "lookup_dcookie" },
     /* 248 */ { "epoll_create" },
     /* 249 */ { "epoll_ctl" },
     /* 250 */ { "epoll_wait" },
     /* 251 */ { "remap_file_pages" },
     /* 252 */ { "set_tid_address" },
     /* 253 */ { "restart_syscall" },
     /* 254 */ { "fadvise64" },
     /* 255 */ { "statfs64" },
     /* 256 */ { "fstafs64" },
     /* 257 */ { "timer_create", sys_getsysinfoFunc },
     /* 258 */ { "timer_settime", sys_setsysinfoFunc },
     /* 259 */ { "timer_gettime" },
     /* 260 */ { "timer_getoverrun" },
     /* 261 */ { "timer_delete" },
     /* 262 */ { "clock_settime" },
     /* 263 */ { "clock_gettime" },
     /* 264 */ { "clock_getres" },
     /* 265 */ { "clock_nanosleep" },
     /* 266 */ { "tgkill" },
     /* 267 */ { "utimes" },
     /* 268 */ { "mbind" },
     /* 269 */ { "get_mempolicy" },
     /* 270 */ { "set_mempolicy" },
     /* 271 */ { "mq_open" },
     /* 272 */ { "mq_unlink" },
     /* 273 */ { "mq_timedsend" },
     /* 274 */ { "mq_timedreceive" },
     /* 275 */ { "mq_notify" },
     /* 276 */ { "mq_getsetattr" },
     /* 277 */ { "vserver" },
     /* 278 */ { "waitid" },
     /* 279 */ { "unknown #279" },
     /* 280 */ { "add_key" },
     /* 281 */ { "request_key" },
     /* 282 */ { "keyctl" },
     /* 283 */ { "set_thread_area", setThreadAreaFunc },
     /* 284 */ { "inotify_init" },
     /* 285 */ { "inotify_add_watch" },
     /* 286 */ { "inotify_rm_watch" },
     /* 287 */ { "migrate_pages" },
     /* 288 */ { "openat" },
     /* 289 */ { "mkdirat" },
     /* 290 */ { "mknodat" },
     /* 291 */ { "fchownat" },
     /* 292 */ { "futimesat" },
     /* 293 */ { "fstatat64" },
     /* 294 */ { "unlinkat" },
     /* 295 */ { "renameat" },
     /* 296 */ { "linkat" },
     /* 297 */ { "symlinkat" },
     /* 298 */ { "readlinkat" },
     /* 299 */ { "fchmodat" },
     /* 300 */ { "faccessat" },
     /* 301 */ { "pselect6" },
     /* 302 */ { "ppoll" },
     /* 303 */ { "unshare" },
     /* 304 */ { "splice" },
     /* 305 */ { "sync_file_range" },
     /* 306 */ { "tee" },
     /* 307 */ { "vmsplice" },
     /* 308 */ { "move_pages" },
     /* 309 */ { "set_robust_list" },
     /* 310 */ { "get_robust_list" },
     /* 311 */ { "kexec_load" },
     /* 312 */ { "getcpu" },
     /* 313 */ { "epoll_pwait" },
     /* 314 */ { "ioprio_set" },
     /* 315 */ { "ioprio_get" },
     /* 316 */ { "utimensat" },
     /* 317 */ { "signalfd" },
     /* 318 */ { "timerfd" },
     /* 319 */ { "eventfd" }
 };

 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);
 }
	/*
	* 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;
	}

	SyscallDescABI<DefaultSyscallABI> MipsLinuxProcess::syscallDescs[] = {
	/* 0 */ { "syscall" },
	/* 1 */ { "exit", exitFunc },
	/* 2 */ { "fork" },
	/* 3 */ { "read", readFunc<MipsLinux> },
	/* 4 */ { "write", writeFunc<MipsLinux> },
	/* 5 */ { "open", openFunc<MipsLinux> },
	/* 6 */ { "close", closeFunc },
	/* 7 */ { "waitpid" },
	/* 8 */ { "creat" },
	/* 9 */ { "link" },
	/* 10 */ { "unlink", unlinkFunc },
	/* 11 */ { "execve" },
	/* 12 */ { "chdir" },
	/* 13 */ { "time" },
	/* 14 */ { "mknod" },
	/* 15 */ { "chmod", chmodFunc<MipsLinux> },
	/* 16 */ { "lchown", chownFunc },
	/* 17 */ { "break", brkFunc },
	/* 18 */ { "unused#18" },
	/* 19 */ { "lseek", lseekFunc },
	/* 20 */ { "getpid", getpidFunc },
	/* 21 */ { "mount" },
	/* 22 */ { "umount" },
	/* 23 */ { "setuid", ignoreFunc },
	/* 24 */ { "getuid", getuidFunc },
	/* 25 */ { "stime" },
	/* 26 */ { "ptrace" },
	/* 27 */ { "alarm" },
	/* 28 */ { "unused#28" },
	/* 29 */ { "pause" },
	/* 30 */ { "utime" },
	/* 31 */ { "stty" },
	/* 32 */ { "gtty" },
	/* 33 */ { "access" },
	/* 34 */ { "nice" },
	/* 35 */ { "ftime" },
	/* 36 */ { "sync" },
	/* 37 */ { "kill" },
	/* 38 */ { "rename" },
	/* 39 */ { "mkdir", mkdirFunc },
	/* 40 */ { "rmdir" },
	/* 41 */ { "dup" },
	/* 42 */ { "pipe", pipePseudoFunc },
	/* 43 */ { "times" },
	/* 44 */ { "prof" },
	/* 45 */ { "brk", brkFunc },
	/* 46 */ { "setgid" },
	/* 47 */ { "getgid", getgidFunc },
	/* 48 */ { "signal", ignoreFunc },
	/* 49 */ { "geteuid", geteuidFunc },
	/* 50 */ { "getegid", getegidFunc },
	/* 51 */ { "acct" },
	/* 52 */ { "umount2" },
	/* 53 */ { "lock" },
	/* 54 */ { "ioctl", ioctlFunc<MipsLinux> },
	/* 55 */ { "fcntl", fcntlFunc },
	/* 56 */ { "mpx" },
	/* 57 */ { "setpgid" },
	/* 58 */ { "ulimit" },
	/* 59 */ { "unused#59" },
	/* 60 */ { "umask", umaskFunc },
	/* 61 */ { "chroot" },
	/* 62 */ { "ustat" },
	/* 63 */ { "dup2" },
	/* 64 */ { "getppid", getpagesizeFunc },
	/* 65 */ { "getpgrp" },
	/* 66 */ { "setsid" },
	/* 67 */ { "sigaction" },
	/* 68 */ { "sgetmask" },
	/* 69 */ { "ssetmask" },
	/* 70 */ { "setreuid" },
	/* 71 */ { "setregid" },
	/* 72 */ { "sigsuspend" },
	/* 73 */ { "sigpending" },
	/* 74 */ { "sethostname", ignoreFunc },
	/* 75 */ { "setrlimit" },
	/* 76 */ { "getrlimit" },
	/* 77 */ { "getrusage", getrusageFunc<MipsLinux> },
	/* 78 */ { "gettimeofday" },
	/* 79 */ { "settimeofday" },
	/* 80 */ { "getgroups" },
	/* 81 */ { "setgroups" },
	/* 82 */ { "reserved#82" },
	/* 83 */ { "symlink" },
	/* 84 */ { "unused#84" },
	/* 85 */ { "readlink", readlinkFunc },
	/* 86 */ { "uselib" },
	/* 87 */ { "swapon", gethostnameFunc },
	/* 88 */ { "reboot" },
	/* 89 */ { "readdir" },
	/* 90 */ { "mmap", mmapFunc<MipsLinux> },
	/* 91 */ { "munmap",munmapFunc },
	/* 92 */ { "truncate", truncateFunc },
	/* 93 */ { "ftruncate", ftruncateFunc },
	/* 94 */ { "fchmod", fchmodFunc<MipsLinux> },
	/* 95 */ { "fchown", fchownFunc },
	/* 96 */ { "getpriority" },
	/* 97 */ { "setpriority" },
	/* 98 */ { "profil" },
	/* 99 */ { "statfs" },
	/* 100 */ { "fstatfs" },
	/* 101 */ { "ioperm" },
	/* 102 */ { "socketcall" },
	/* 103 */ { "syslog" },
	/* 104 */ { "setitimer" },
	/* 105 */ { "getitimer" },
	/* 106 */ { "stat", statFunc<MipsLinux> },
	/* 107 */ { "lstat" },
	/* 108 */ { "fstat", fstatFunc<MipsLinux> },
	/* 109 */ { "unused#109" },
	/* 110 */ { "iopl" },
	/* 111 */ { "vhangup" },
	/* 112 */ { "idle", ignoreFunc },
	/* 113 */ { "vm86" },
	/* 114 */ { "wait4" },
	/* 115 */ { "swapoff" },
	/* 116 */ { "sysinfo", sysinfoFunc<MipsLinux> },
	/* 117 */ { "ipc" },
	/* 118 */ { "fsync" },
	/* 119 */ { "sigreturn" },
	/* 120 */ { "clone" },
	/* 121 */ { "setdomainname" },
	/* 122 */ { "uname", unameFunc },
	/* 123 */ { "modify_ldt" },
	/* 124 */ { "adjtimex" },
	/* 125 */ { "mprotect", ignoreFunc },
	/* 126 */ { "sigprocmask" },
	/* 127 */ { "create_module" },
	/* 128 */ { "init_module" },
	/* 129 */ { "delete_module" },
	/* 130 */ { "get_kernel_syms" },
	/* 131 */ { "quotactl" },
	/* 132 */ { "getpgid" },
	/* 133 */ { "fchdir" },
	/* 134 */ { "bdflush" },
	/* 135 */ { "sysfs" },
	/* 136 */ { "personality" },
	/* 137 */ { "afs_syscall" },
	/* 138 */ { "setfsuid" },
	/* 139 */ { "setfsgid" },
	/* 140 */ { "llseek" },
	/* 141 */ { "getdents" },
	/* 142 */ { "newselect" },
	/* 143 */ { "flock" },
	/* 144 */ { "msync" },
	/* 145 */ { "readv" },
	/* 146 */ { "writev", writevFunc<MipsLinux> },
	/* 147 */ { "cacheflush" },
	/* 148 */ { "cachectl" },
	/* 149 */ { "sysmips" },
	/* 150 */ { "unused#150" },
	/* 151 */ { "getsid" },
	/* 152 */ { "fdatasync" },
	/* 153 */ { "sysctl", ignoreFunc },
	/* 154 */ { "mlock" },
	/* 155 */ { "munlock" },
	/* 156 */ { "mlockall" },
	/* 157 */ { "munlockall" },
	/* 158 */ { "sched_setparam" },
	/* 159 */ { "sched_getparam" },
	/* 160 */ { "sched_setscheduler" },
	/* 161 */ { "sched_getscheduler" },
	/* 162 */ { "sched_yield" },
	/* 163 */ { "sched_get_prioritymax" },
	/* 164 */ { "sched_get_priority_min" },
	/* 165 */ { "sched_rr_get_interval" },
	/* 166 */ { "nanosleep" },
	/* 167 */ { "mremap", mremapFunc<MipsLinux> },
	/* 168 */ { "accept" },
	/* 169 */ { "bind" },
	/* 170 */ { "connect" },
	/* 171 */ { "getpeername" },
	/* 172 */ { "getsockname" },
	/* 173 */ { "getsockopt" },
	/* 174 */ { "listen" },
	/* 175 */ { "recv" },
	/* 176 */ { "recvmsg" },
	/* 177 */ { "send" },
	/* 178 */ { "sendmsg", ignoreFunc },
	/* 179 */ { "sendto" },
	/* 180 */ { "setsockopt" },
	/* 181 */ { "shutdown" },
	/* 182 */ { "unknown #182" },
	/* 183 */ { "socket", ignoreFunc },
	/* 184 */ { "socketpair" },
	/* 185 */ { "setresuid" },
	/* 186 */ { "getresuid" },
	/* 187 */ { "query_module" },
	/* 188 */ { "poll" },
	/* 189 */ { "nfsservctl" },
	/* 190 */ { "setresgid" },
	/* 191 */ { "getresgid" },
	/* 192 */ { "prctl" },
	/* 193 */ { "rt_sigreturn" },
	/* 194 */ { "rt_sigaction" },
	/* 195 */ { "rt_sigprocmask" },
	/* 196 */ { "rt_sigpending" },
	/* 197 */ { "rt_sigtimedwait" },
	/* 198 */ { "rt_sigqueueinfo", ignoreFunc },
	/* 199 */ { "rt_sigsuspend" },
	/* 200 */ { "pread64" },
	/* 201 */ { "pwrite64" },
	/* 202 */ { "chown" },
	/* 203 */ { "getcwd", getcwdFunc },
	/* 204 */ { "capget" },
	/* 205 */ { "capset" },
	/* 206 */ { "sigalstack" },
	/* 207 */ { "sendfile" },
	/* 208 */ { "getpmsg" },
	/* 209 */ { "putpmsg" },
	/* 210 */ { "mmap2" },
	/* 211 */ { "truncate64" },
	/* 212 */ { "ftruncate64" },
	/* 213 */ { "stat64" },
	/* 214 */ { "lstat64", lstat64Func<MipsLinux> },
	/* 215 */ { "fstat64", fstat64Func<MipsLinux> },
	/* 216 */ { "pivot_root" },
	/* 217 */ { "mincore" },
	/* 218 */ { "madvise" },
	/* 219 */ { "getdents64" },
	/* 220 */ { "fcntl64", fcntl64Func },
	/* 221 */ { "reserved#221" },
	/* 222 */ { "gettid" },
	/* 223 */ { "readahead" },
	/* 224 */ { "setxattr" },
	/* 225 */ { "lsetxattr" },
	/* 226 */ { "fsetxattr" },
	/* 227 */ { "getxattr" },
	/* 228 */ { "lgetxattr" },
	/* 229 */ { "fgetxattr" },
	/* 230 */ { "listxattr" },
	/* 231 */ { "llistxattr" },
	/* 232 */ { "flistxattr" },
	/* 233 */ { "removexattr" },
	/* 234 */ { "lremovexattr" },
	/* 235 */ { "fremovexattr", ignoreFunc },
	/* 236 */ { "tkill" },
	/* 237 */ { "sendfile64" },
	/* 238 */ { "futex" },
	/* 239 */ { "sched_setaffinity" },
	/* 240 */ { "sched_getaffinity" },
	/* 241 */ { "io_setup" },
	/* 242 */ { "io_destroy" },
	/* 243 */ { "io_getevents" },
	/* 244 */ { "io_submit" },
	/* 245 */ { "io_cancel" },
	/* 246 */ { "exit_group", exitFunc },
	/* 247 */ { "lookup_dcookie" },
	/* 248 */ { "epoll_create" },
	/* 249 */ { "epoll_ctl" },
	/* 250 */ { "epoll_wait" },
	/* 251 */ { "remap_file_pages" },
	/* 252 */ { "set_tid_address" },
	/* 253 */ { "restart_syscall" },
	/* 254 */ { "fadvise64" },
	/* 255 */ { "statfs64" },
	/* 256 */ { "fstafs64" },
	/* 257 */ { "timer_create", sys_getsysinfoFunc },
	/* 258 */ { "timer_settime", sys_setsysinfoFunc },
	/* 259 */ { "timer_gettime" },
	/* 260 */ { "timer_getoverrun" },
	/* 261 */ { "timer_delete" },
	/* 262 */ { "clock_settime" },
	/* 263 */ { "clock_gettime" },
	/* 264 */ { "clock_getres" },
	/* 265 */ { "clock_nanosleep" },
	/* 266 */ { "tgkill" },
	/* 267 */ { "utimes" },
	/* 268 */ { "mbind" },
	/* 269 */ { "get_mempolicy" },
	/* 270 */ { "set_mempolicy" },
	/* 271 */ { "mq_open" },
	/* 272 */ { "mq_unlink" },
	/* 273 */ { "mq_timedsend" },
	/* 274 */ { "mq_timedreceive" },
	/* 275 */ { "mq_notify" },
	/* 276 */ { "mq_getsetattr" },
	/* 277 */ { "vserver" },
	/* 278 */ { "waitid" },
	/* 279 */ { "unknown #279" },
	/* 280 */ { "add_key" },
	/* 281 */ { "request_key" },
	/* 282 */ { "keyctl" },
	/* 283 */ { "set_thread_area", setThreadAreaFunc },
	/* 284 */ { "inotify_init" },
	/* 285 */ { "inotify_add_watch" },
	/* 286 */ { "inotify_rm_watch" },
	/* 287 */ { "migrate_pages" },
	/* 288 */ { "openat" },
	/* 289 */ { "mkdirat" },
	/* 290 */ { "mknodat" },
	/* 291 */ { "fchownat" },
	/* 292 */ { "futimesat" },
	/* 293 */ { "fstatat64" },
	/* 294 */ { "unlinkat" },
	/* 295 */ { "renameat" },
	/* 296 */ { "linkat" },
	/* 297 */ { "symlinkat" },
	/* 298 */ { "readlinkat" },
	/* 299 */ { "fchmodat" },
	/* 300 */ { "faccessat" },
	/* 301 */ { "pselect6" },
	/* 302 */ { "ppoll" },
	/* 303 */ { "unshare" },
	/* 304 */ { "splice" },
	/* 305 */ { "sync_file_range" },
	/* 306 */ { "tee" },
	/* 307 */ { "vmsplice" },
	/* 308 */ { "move_pages" },
	/* 309 */ { "set_robust_list" },
	/* 310 */ { "get_robust_list" },
	/* 311 */ { "kexec_load" },
	/* 312 */ { "getcpu" },
	/* 313 */ { "epoll_pwait" },
	/* 314 */ { "ioprio_set" },
	/* 315 */ { "ioprio_get" },
	/* 316 */ { "utimensat" },
	/* 317 */ { "signalfd" },
	/* 318 */ { "timerfd" },
	/* 319 */ { "eventfd" }
	};

	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);
	}