src/sim/process.cc

   1 /*
   2  * Copyright (c) 2001-2005 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: Nathan Binkert
  29  *          Steve Reinhardt
  30  *          Ali Saidi
  31  */
  32
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35
  36 #include <cstdio>
  37 #include <string>
  38
  39 #include "base/loader/object_file.hh"
  40 #include "base/loader/symtab.hh"
  41 #include "base/intmath.hh"
  42 #include "base/statistics.hh"
  43 #include "config/the_isa.hh"
  44 #include "cpu/thread_context.hh"
  45 #include "mem/page_table.hh"
  46 #include "mem/physical.hh"
  47 #include "mem/translating_port.hh"
  48 #include "params/LiveProcess.hh"
  49 #include "params/Process.hh"
  50 #include "sim/debug.hh"
  51 #include "sim/process.hh"
  52 #include "sim/process_impl.hh"
  53 #include "sim/stats.hh"
  54 #include "sim/syscall_emul.hh"
  55 #include "sim/system.hh"
  56
  57 #if THE_ISA == ALPHA_ISA
  58 #include "arch/alpha/linux/process.hh"
  59 #include "arch/alpha/tru64/process.hh"
  60 #elif THE_ISA == SPARC_ISA
  61 #include "arch/sparc/linux/process.hh"
  62 #include "arch/sparc/solaris/process.hh"
  63 #elif THE_ISA == MIPS_ISA
  64 #include "arch/mips/linux/process.hh"
  65 #elif THE_ISA == ARM_ISA
  66 #include "arch/arm/linux/process.hh"
  67 #elif THE_ISA == X86_ISA
  68 #include "arch/x86/linux/process.hh"
  69 #elif THE_ISA == POWER_ISA
  70 #include "arch/power/linux/process.hh"
  71 #else
  72 #error "THE_ISA not set"
  73 #endif
  74
  75
  76 using namespace std;
  77 using namespace TheISA;
  78
  79 // current number of allocated processes
  80 int num_processes = 0;
  81
  82 template<class IntType>
  83 AuxVector<IntType>::AuxVector(IntType type, IntType val)
  84 {
  85     a_type = TheISA::htog(type);
  86     a_val = TheISA::htog(val);
  87 }
  88
  89 template class AuxVector<uint32_t>;
  90 template class AuxVector<uint64_t>;
  91
  92 Process::Process(ProcessParams * params)
  93     : SimObject(params), system(params->system),
  94       max_stack_size(params->max_stack_size)
  95 {
  96     string in = params->input;
  97     string out = params->output;
  98     string err = params->errout;
  99
 100     // initialize file descriptors to default: same as simulator
 101     int stdin_fd, stdout_fd, stderr_fd;
 102
 103     if (in == "stdin" || in == "cin")
 104         stdin_fd = STDIN_FILENO;
 105     else if (in == "None")
 106         stdin_fd = -1;
 107     else
 108         stdin_fd = Process::openInputFile(in);
 109
 110     if (out == "stdout" || out == "cout")
 111         stdout_fd = STDOUT_FILENO;
 112     else if (out == "stderr" || out == "cerr")
 113         stdout_fd = STDERR_FILENO;
 114     else if (out == "None")
 115         stdout_fd = -1;
 116     else
 117         stdout_fd = Process::openOutputFile(out);
 118
 119     if (err == "stdout" || err == "cout")
 120         stderr_fd = STDOUT_FILENO;
 121     else if (err == "stderr" || err == "cerr")
 122         stderr_fd = STDERR_FILENO;
 123     else if (err == "None")
 124         stderr_fd = -1;
 125     else if (err == out)
 126         stderr_fd = stdout_fd;
 127     else
 128         stderr_fd = Process::openOutputFile(err);
 129
 130     M5_pid = system->allocatePID();
 131     // initialize first 3 fds (stdin, stdout, stderr)
 132     Process::FdMap *fdo = &fd_map[STDIN_FILENO];
 133     fdo->fd = stdin_fd;
 134     fdo->filename = in;
 135     fdo->flags = O_RDONLY;
 136     fdo->mode = -1;
 137     fdo->fileOffset = 0;
 138
 139     fdo =  &fd_map[STDOUT_FILENO];
 140     fdo->fd = stdout_fd;
 141     fdo->filename = out;
 142     fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
 143     fdo->mode = 0774;
 144     fdo->fileOffset = 0;
 145
 146     fdo = &fd_map[STDERR_FILENO];
 147     fdo->fd = stderr_fd;
 148     fdo->filename = err;
 149     fdo->flags = O_WRONLY;
 150     fdo->mode = -1;
 151     fdo->fileOffset = 0;
 152
 153
 154     // mark remaining fds as free
 155     for (int i = 3; i <= MAX_FD; ++i) {
 156         Process::FdMap *fdo = &fd_map[i];
 157         fdo->fd = -1;
 158     }
 159
 160     mmap_start = mmap_end = 0;
 161     nxm_start = nxm_end = 0;
 162     pTable = new PageTable(this);
 163     // other parameters will be initialized when the program is loaded
 164 }
 165
 166
 167 void
 168 Process::regStats()
 169 {
 170     using namespace Stats;
 171
 172     num_syscalls
 173         .name(name() + ".num_syscalls")
 174         .desc("Number of system calls")
 175         ;
 176 }
 177
 178 //
 179 // static helper functions
 180 //
 181 int
 182 Process::openInputFile(const string &filename)
 183 {
 184     int fd = open(filename.c_str(), O_RDONLY);
 185
 186     if (fd == -1) {
 187         perror(NULL);
 188         cerr << "unable to open \"" << filename << "\" for reading\n";
 189         fatal("can't open input file");
 190     }
 191
 192     return fd;
 193 }
 194
 195
 196 int
 197 Process::openOutputFile(const string &filename)
 198 {
 199     int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
 200
 201     if (fd == -1) {
 202         perror(NULL);
 203         cerr << "unable to open \"" << filename << "\" for writing\n";
 204         fatal("can't open output file");
 205     }
 206
 207     return fd;
 208 }
 209
 210 ThreadContext *
 211 Process::findFreeContext()
 212 {
 213     int size = contextIds.size();
 214     ThreadContext *tc;
 215     for (int i = 0; i < size; ++i) {
 216         tc = system->getThreadContext(contextIds[i]);
 217         if (tc->status() == ThreadContext::Halted) {
 218             // inactive context, free to use
 219             return tc;
 220         }
 221     }
 222     return NULL;
 223 }
 224
 225 void
 226 Process::initState()
 227 {
 228     if (contextIds.empty())
 229         fatal("Process %s is not associated with any HW contexts!\n", name());
 230
 231     // first thread context for this process... initialize & enable
 232     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 233
 234     // mark this context as active so it will start ticking.
 235     tc->activate(0);
 236
 237     Port *mem_port;
 238     mem_port = system->physmem->getPort("functional");
 239     initVirtMem = new TranslatingPort("process init port", this,
 240             TranslatingPort::Always);
 241     mem_port->setPeer(initVirtMem);
 242     initVirtMem->setPeer(mem_port);
 243 }
 244
 245 // map simulator fd sim_fd to target fd tgt_fd
 246 void
 247 Process::dup_fd(int sim_fd, int tgt_fd)
 248 {
 249     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 250         panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
 251
 252     Process::FdMap *fdo = &fd_map[tgt_fd];
 253     fdo->fd = sim_fd;
 254 }
 255
 256
 257 // generate new target fd for sim_fd
 258 int
 259 Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
 260 {
 261     // in case open() returns an error, don't allocate a new fd
 262     if (sim_fd == -1)
 263         return -1;
 264
 265     // find first free target fd
 266     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 267         Process::FdMap *fdo = &fd_map[free_fd];
 268         if (fdo->fd == -1) {
 269             fdo->fd = sim_fd;
 270             fdo->filename = filename;
 271             fdo->mode = mode;
 272             fdo->fileOffset = 0;
 273             fdo->flags = flags;
 274             fdo->isPipe = pipe;
 275             fdo->readPipeSource = 0;
 276             return free_fd;
 277         }
 278     }
 279
 280     panic("Process::alloc_fd: out of file descriptors!");
 281 }
 282
 283
 284 // free target fd (e.g., after close)
 285 void
 286 Process::free_fd(int tgt_fd)
 287 {
 288     Process::FdMap *fdo = &fd_map[tgt_fd];
 289     if (fdo->fd == -1)
 290         warn("Process::free_fd: request to free unused fd %d", tgt_fd);
 291
 292     fdo->fd = -1;
 293     fdo->filename = "NULL";
 294     fdo->mode = 0;
 295     fdo->fileOffset = 0;
 296     fdo->flags = 0;
 297     fdo->isPipe = false;
 298     fdo->readPipeSource = 0;
 299 }
 300
 301
 302 // look up simulator fd for given target fd
 303 int
 304 Process::sim_fd(int tgt_fd)
 305 {
 306     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 307         return -1;
 308
 309     return fd_map[tgt_fd].fd;
 310 }
 311
 312 Process::FdMap *
 313 Process::sim_fd_obj(int tgt_fd)
 314 {
 315     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 316         return NULL;
 317
 318     return &fd_map[tgt_fd];
 319 }
 320
 321 bool
 322 Process::fixupStackFault(Addr vaddr)
 323 {
 324     // Check if this is already on the stack and there's just no page there
 325     // yet.
 326     if (vaddr >= stack_min && vaddr < stack_base) {
 327         pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
 328         return true;
 329     }
 330
 331     // We've accessed the next page of the stack, so extend it to include
 332     // this address.
 333     if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
 334         while (vaddr < stack_min) {
 335             stack_min -= TheISA::PageBytes;
 336             if (stack_base - stack_min > max_stack_size)
 337                 fatal("Maximum stack size exceeded\n");
 338             if (stack_base - stack_min > 8 * 1024 * 1024)
 339                 fatal("Over max stack size for one thread\n");
 340             pTable->allocate(stack_min, TheISA::PageBytes);
 341             inform("Increasing stack size by one page.");
 342         };
 343         return true;
 344     }
 345     warn("Not extending stack: address %#x isn't at the end of the stack.",
 346         vaddr);
 347     return false;
 348 }
 349
 350 // find all offsets for currently open files and save them
 351 void
 352 Process::fix_file_offsets()
 353 {
 354     Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
 355     Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
 356     Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
 357     string in = fdo_stdin->filename;
 358     string out = fdo_stdout->filename;
 359     string err = fdo_stderr->filename;
 360
 361     // initialize file descriptors to default: same as simulator
 362     int stdin_fd, stdout_fd, stderr_fd;
 363
 364     if (in == "stdin" || in == "cin")
 365         stdin_fd = STDIN_FILENO;
 366     else if (in == "None")
 367         stdin_fd = -1;
 368     else {
 369         // open standard in and seek to the right location
 370         stdin_fd = Process::openInputFile(in);
 371         if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
 372             panic("Unable to seek to correct location in file: %s", in);
 373     }
 374
 375     if (out == "stdout" || out == "cout")
 376         stdout_fd = STDOUT_FILENO;
 377     else if (out == "stderr" || out == "cerr")
 378         stdout_fd = STDERR_FILENO;
 379     else if (out == "None")
 380         stdout_fd = -1;
 381     else {
 382         stdout_fd = Process::openOutputFile(out);
 383         if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
 384             panic("Unable to seek to correct location in file: %s", out);
 385     }
 386
 387     if (err == "stdout" || err == "cout")
 388         stderr_fd = STDOUT_FILENO;
 389     else if (err == "stderr" || err == "cerr")
 390         stderr_fd = STDERR_FILENO;
 391     else if (err == "None")
 392         stderr_fd = -1;
 393     else if (err == out)
 394         stderr_fd = stdout_fd;
 395     else {
 396         stderr_fd = Process::openOutputFile(err);
 397         if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
 398             panic("Unable to seek to correct location in file: %s", err);
 399     }
 400
 401     fdo_stdin->fd = stdin_fd;
 402     fdo_stdout->fd = stdout_fd;
 403     fdo_stderr->fd = stderr_fd;
 404
 405
 406     for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
 407         Process::FdMap *fdo = &fd_map[free_fd];
 408         if (fdo->fd != -1) {
 409             if (fdo->isPipe){
 410                 if (fdo->filename == "PIPE-WRITE")
 411                     continue;
 412                 else {
 413                     assert (fdo->filename == "PIPE-READ");
 414                     //create a new pipe
 415                     int fds[2];
 416                     int pipe_retval = pipe(fds);
 417
 418                     if (pipe_retval < 0) {
 419                         // error
 420                         panic("Unable to create new pipe.");
 421                     }
 422                     fdo->fd = fds[0]; //set read pipe
 423                     Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
 424                     if (fdo_write->filename != "PIPE-WRITE")
 425                         panic ("Couldn't find write end of the pipe");
 426
 427                     fdo_write->fd = fds[1];//set write pipe
 428                }
 429             } else {
 430                 //Open file
 431                 int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
 432
 433                 if (fd == -1)
 434                     panic("Unable to open file: %s", fdo->filename);
 435                 fdo->fd = fd;
 436
 437                 //Seek to correct location before checkpoint
 438                 if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
 439                     panic("Unable to seek to correct location in file: %s",
 440                           fdo->filename);
 441             }
 442         }
 443     }
 444 }
 445
 446 void
 447 Process::find_file_offsets()
 448 {
 449     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 450         Process::FdMap *fdo = &fd_map[free_fd];
 451         if (fdo->fd != -1) {
 452             fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
 453         } else {
 454                 fdo->filename = "NULL";
 455                 fdo->fileOffset = 0;
 456         }
 457     }
 458 }
 459
 460 void
 461 Process::setReadPipeSource(int read_pipe_fd, int source_fd)
 462 {
 463     Process::FdMap *fdo = &fd_map[read_pipe_fd];
 464     fdo->readPipeSource = source_fd;
 465 }
 466
 467 void
 468 Process::FdMap::serialize(std::ostream &os)
 469 {
 470     SERIALIZE_SCALAR(fd);
 471     SERIALIZE_SCALAR(isPipe);
 472     SERIALIZE_SCALAR(filename);
 473     SERIALIZE_SCALAR(flags);
 474     SERIALIZE_SCALAR(readPipeSource);
 475     SERIALIZE_SCALAR(fileOffset);
 476 }
 477
 478 void
 479 Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
 480 {
 481     UNSERIALIZE_SCALAR(fd);
 482     UNSERIALIZE_SCALAR(isPipe);
 483     UNSERIALIZE_SCALAR(filename);
 484     UNSERIALIZE_SCALAR(flags);
 485     UNSERIALIZE_SCALAR(readPipeSource);
 486     UNSERIALIZE_SCALAR(fileOffset);
 487 }
 488
 489 void
 490 Process::serialize(std::ostream &os)
 491 {
 492     SERIALIZE_SCALAR(brk_point);
 493     SERIALIZE_SCALAR(stack_base);
 494     SERIALIZE_SCALAR(stack_size);
 495     SERIALIZE_SCALAR(stack_min);
 496     SERIALIZE_SCALAR(next_thread_stack_base);
 497     SERIALIZE_SCALAR(mmap_start);
 498     SERIALIZE_SCALAR(mmap_end);
 499     SERIALIZE_SCALAR(nxm_start);
 500     SERIALIZE_SCALAR(nxm_end);
 501     find_file_offsets();
 502     pTable->serialize(os);
 503     for (int x = 0; x <= MAX_FD; x++) {
 504         nameOut(os, csprintf("%s.FdMap%d", name(), x));
 505         fd_map[x].serialize(os);
 506     }
 507     SERIALIZE_SCALAR(M5_pid);
 508
 509 }
 510
 511 void
 512 Process::unserialize(Checkpoint *cp, const std::string &section)
 513 {
 514     UNSERIALIZE_SCALAR(brk_point);
 515     UNSERIALIZE_SCALAR(stack_base);
 516     UNSERIALIZE_SCALAR(stack_size);
 517     UNSERIALIZE_SCALAR(stack_min);
 518     UNSERIALIZE_SCALAR(next_thread_stack_base);
 519     UNSERIALIZE_SCALAR(mmap_start);
 520     UNSERIALIZE_SCALAR(mmap_end);
 521     UNSERIALIZE_SCALAR(nxm_start);
 522     UNSERIALIZE_SCALAR(nxm_end);
 523     pTable->unserialize(cp, section);
 524     for (int x = 0; x <= MAX_FD; x++) {
 525         fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
 526     }
 527     fix_file_offsets();
 528     UNSERIALIZE_OPT_SCALAR(M5_pid);
 529     // The above returns a bool so that you could do something if you don't
 530     // find the param in the checkpoint if you wanted to, like set a default
 531     // but in this case we'll just stick with the instantianted value if not
 532     // found.
 533 }
 534
 535
 536 ////////////////////////////////////////////////////////////////////////
 537 //
 538 // LiveProcess member definitions
 539 //
 540 ////////////////////////////////////////////////////////////////////////
 541
 542
 543 LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
 544     : Process(params), objFile(_objFile),
 545       argv(params->cmd), envp(params->env), cwd(params->cwd)
 546 {
 547     __uid = params->uid;
 548     __euid = params->euid;
 549     __gid = params->gid;
 550     __egid = params->egid;
 551     __pid = params->pid;
 552     __ppid = params->ppid;
 553
 554     prog_fname = params->cmd[0];
 555
 556     // load up symbols, if any... these may be used for debugging or
 557     // profiling.
 558     if (!debugSymbolTable) {
 559         debugSymbolTable = new SymbolTable();
 560         if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
 561             !objFile->loadLocalSymbols(debugSymbolTable)) {
 562             // didn't load any symbols
 563             delete debugSymbolTable;
 564             debugSymbolTable = NULL;
 565         }
 566     }
 567 }
 568
 569 void
 570 LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
 571 {
 572     num_syscalls++;
 573
 574     SyscallDesc *desc = getDesc(callnum);
 575     if (desc == NULL)
 576         fatal("Syscall %d out of range", callnum);
 577
 578     desc->doSyscall(callnum, this, tc);
 579 }
 580
 581 IntReg
 582 LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
 583 {
 584     return getSyscallArg(tc, i);
 585 }
 586
 587 LiveProcess *
 588 LiveProcess::create(LiveProcessParams * params)
 589 {
 590     LiveProcess *process = NULL;
 591
 592     string executable =
 593         params->executable == "" ? params->cmd[0] : params->executable;
 594     ObjectFile *objFile = createObjectFile(executable);
 595     if (objFile == NULL) {
 596         fatal("Can't load object file %s", executable);
 597     }
 598
 599     if (objFile->isDynamic())
 600        fatal("Object file is a dynamic executable however only static "
 601              "executables are supported!\n       Please recompile your "
 602              "executable as a static binary and try again.\n");
 603
 604 #if THE_ISA == ALPHA_ISA
 605     if (objFile->getArch() != ObjectFile::Alpha)
 606         fatal("Object file architecture does not match compiled ISA (Alpha).");
 607
 608     switch (objFile->getOpSys()) {
 609       case ObjectFile::Tru64:
 610         process = new AlphaTru64Process(params, objFile);
 611         break;
 612
 613       case ObjectFile::UnknownOpSys:
 614         warn("Unknown operating system; assuming Linux.");
 615         // fall through
 616       case ObjectFile::Linux:
 617         process = new AlphaLinuxProcess(params, objFile);
 618         break;
 619
 620       default:
 621         fatal("Unknown/unsupported operating system.");
 622     }
 623 #elif THE_ISA == SPARC_ISA
 624     if (objFile->getArch() != ObjectFile::SPARC64 &&
 625         objFile->getArch() != ObjectFile::SPARC32)
 626         fatal("Object file architecture does not match compiled ISA (SPARC).");
 627     switch (objFile->getOpSys()) {
 628       case ObjectFile::UnknownOpSys:
 629         warn("Unknown operating system; assuming Linux.");
 630         // fall through
 631       case ObjectFile::Linux:
 632         if (objFile->getArch() == ObjectFile::SPARC64) {
 633             process = new Sparc64LinuxProcess(params, objFile);
 634         } else {
 635             process = new Sparc32LinuxProcess(params, objFile);
 636         }
 637         break;
 638
 639
 640       case ObjectFile::Solaris:
 641         process = new SparcSolarisProcess(params, objFile);
 642         break;
 643
 644       default:
 645         fatal("Unknown/unsupported operating system.");
 646     }
 647 #elif THE_ISA == X86_ISA
 648     if (objFile->getArch() != ObjectFile::X86_64 &&
 649         objFile->getArch() != ObjectFile::I386)
 650         fatal("Object file architecture does not match compiled ISA (x86).");
 651     switch (objFile->getOpSys()) {
 652       case ObjectFile::UnknownOpSys:
 653         warn("Unknown operating system; assuming Linux.");
 654         // fall through
 655       case ObjectFile::Linux:
 656         if (objFile->getArch() == ObjectFile::X86_64) {
 657             process = new X86_64LinuxProcess(params, objFile);
 658         } else {
 659             process = new I386LinuxProcess(params, objFile);
 660         }
 661         break;
 662
 663       default:
 664         fatal("Unknown/unsupported operating system.");
 665     }
 666 #elif THE_ISA == MIPS_ISA
 667     if (objFile->getArch() != ObjectFile::Mips)
 668         fatal("Object file architecture does not match compiled ISA (MIPS).");
 669     switch (objFile->getOpSys()) {
 670       case ObjectFile::UnknownOpSys:
 671         warn("Unknown operating system; assuming Linux.");
 672         // fall through
 673       case ObjectFile::Linux:
 674         process = new MipsLinuxProcess(params, objFile);
 675         break;
 676
 677       default:
 678         fatal("Unknown/unsupported operating system.");
 679     }
 680 #elif THE_ISA == ARM_ISA
 681     if (objFile->getArch() != ObjectFile::Arm &&
 682         objFile->getArch() != ObjectFile::Thumb)
 683         fatal("Object file architecture does not match compiled ISA (ARM).");
 684     switch (objFile->getOpSys()) {
 685       case ObjectFile::UnknownOpSys:
 686         warn("Unknown operating system; assuming Linux.");
 687         // fall through
 688       case ObjectFile::Linux:
 689         process = new ArmLinuxProcess(params, objFile, objFile->getArch());
 690         break;
 691       case ObjectFile::LinuxArmOABI:
 692         fatal("M5 does not support ARM OABI binaries. Please recompile with an"
 693               " EABI compiler.");
 694       default:
 695         fatal("Unknown/unsupported operating system.");
 696     }
 697 #elif THE_ISA == POWER_ISA
 698     if (objFile->getArch() != ObjectFile::Power)
 699         fatal("Object file architecture does not match compiled ISA (Power).");
 700     switch (objFile->getOpSys()) {
 701       case ObjectFile::UnknownOpSys:
 702         warn("Unknown operating system; assuming Linux.");
 703         // fall through
 704       case ObjectFile::Linux:
 705         process = new PowerLinuxProcess(params, objFile);
 706         break;
 707
 708       default:
 709         fatal("Unknown/unsupported operating system.");
 710     }
 711 #else
 712 #error "THE_ISA not set"
 713 #endif
 714
 715     if (process == NULL)
 716         fatal("Unknown error creating process object.");
 717     return process;
 718 }
 719
 720 LiveProcess *
 721 LiveProcessParams::create()
 722 {
 723     return LiveProcess::create(this);
 724 }