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/full_system.hh"
  44 #include "config/the_isa.hh"
  45 #include "cpu/thread_context.hh"
  46 #include "mem/page_table.hh"
  47 #include "mem/physical.hh"
  48 #include "mem/translating_port.hh"
  49 #include "params/LiveProcess.hh"
  50 #include "params/Process.hh"
  51 #include "sim/debug.hh"
  52 #include "sim/process.hh"
  53 #include "sim/process_impl.hh"
  54 #include "sim/stats.hh"
  55 #include "sim/syscall_emul.hh"
  56 #include "sim/system.hh"
  57
  58 #if THE_ISA == ALPHA_ISA
  59 #include "arch/alpha/linux/process.hh"
  60 #include "arch/alpha/tru64/process.hh"
  61 #elif THE_ISA == SPARC_ISA
  62 #include "arch/sparc/linux/process.hh"
  63 #include "arch/sparc/solaris/process.hh"
  64 #elif THE_ISA == MIPS_ISA
  65 #include "arch/mips/linux/process.hh"
  66 #elif THE_ISA == ARM_ISA
  67 #include "arch/arm/linux/process.hh"
  68 #elif THE_ISA == X86_ISA
  69 #include "arch/x86/linux/process.hh"
  70 #elif THE_ISA == POWER_ISA
  71 #include "arch/power/linux/process.hh"
  72 #else
  73 #error "THE_ISA not set"
  74 #endif
  75
  76
  77 using namespace std;
  78 using namespace TheISA;
  79
  80 //
  81 // The purpose of this code is to fake the loader & syscall mechanism
  82 // when there's no OS: thus there's no resone to use it in FULL_SYSTEM
  83 // mode when we do have an OS
  84 //
  85 #if FULL_SYSTEM
  86 #error "process.cc not compatible with FULL_SYSTEM"
  87 #endif
  88
  89 // current number of allocated processes
  90 int num_processes = 0;
  91
  92 template<class IntType>
  93 AuxVector<IntType>::AuxVector(IntType type, IntType val)
  94 {
  95     a_type = TheISA::htog(type);
  96     a_val = TheISA::htog(val);
  97 }
  98
  99 template class AuxVector<uint32_t>;
 100 template class AuxVector<uint64_t>;
 101
 102 Process::Process(ProcessParams * params)
 103     : SimObject(params), system(params->system),
 104       max_stack_size(params->max_stack_size)
 105 {
 106     string in = params->input;
 107     string out = params->output;
 108     string err = params->errout;
 109
 110     // initialize file descriptors to default: same as simulator
 111     int stdin_fd, stdout_fd, stderr_fd;
 112
 113     if (in == "stdin" || in == "cin")
 114         stdin_fd = STDIN_FILENO;
 115     else if (in == "None")
 116         stdin_fd = -1;
 117     else
 118         stdin_fd = Process::openInputFile(in);
 119
 120     if (out == "stdout" || out == "cout")
 121         stdout_fd = STDOUT_FILENO;
 122     else if (out == "stderr" || out == "cerr")
 123         stdout_fd = STDERR_FILENO;
 124     else if (out == "None")
 125         stdout_fd = -1;
 126     else
 127         stdout_fd = Process::openOutputFile(out);
 128
 129     if (err == "stdout" || err == "cout")
 130         stderr_fd = STDOUT_FILENO;
 131     else if (err == "stderr" || err == "cerr")
 132         stderr_fd = STDERR_FILENO;
 133     else if (err == "None")
 134         stderr_fd = -1;
 135     else if (err == out)
 136         stderr_fd = stdout_fd;
 137     else
 138         stderr_fd = Process::openOutputFile(err);
 139
 140     M5_pid = system->allocatePID();
 141     // initialize first 3 fds (stdin, stdout, stderr)
 142     Process::FdMap *fdo = &fd_map[STDIN_FILENO];
 143     fdo->fd = stdin_fd;
 144     fdo->filename = in;
 145     fdo->flags = O_RDONLY;
 146     fdo->mode = -1;
 147     fdo->fileOffset = 0;
 148
 149     fdo =  &fd_map[STDOUT_FILENO];
 150     fdo->fd = stdout_fd;
 151     fdo->filename = out;
 152     fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
 153     fdo->mode = 0774;
 154     fdo->fileOffset = 0;
 155
 156     fdo = &fd_map[STDERR_FILENO];
 157     fdo->fd = stderr_fd;
 158     fdo->filename = err;
 159     fdo->flags = O_WRONLY;
 160     fdo->mode = -1;
 161     fdo->fileOffset = 0;
 162
 163
 164     // mark remaining fds as free
 165     for (int i = 3; i <= MAX_FD; ++i) {
 166         Process::FdMap *fdo = &fd_map[i];
 167         fdo->fd = -1;
 168     }
 169
 170     mmap_start = mmap_end = 0;
 171     nxm_start = nxm_end = 0;
 172     pTable = new PageTable(this);
 173     // other parameters will be initialized when the program is loaded
 174 }
 175
 176
 177 void
 178 Process::regStats()
 179 {
 180     using namespace Stats;
 181
 182     num_syscalls
 183         .name(name() + ".num_syscalls")
 184         .desc("Number of system calls")
 185         ;
 186 }
 187
 188 //
 189 // static helper functions
 190 //
 191 int
 192 Process::openInputFile(const string &filename)
 193 {
 194     int fd = open(filename.c_str(), O_RDONLY);
 195
 196     if (fd == -1) {
 197         perror(NULL);
 198         cerr << "unable to open \"" << filename << "\" for reading\n";
 199         fatal("can't open input file");
 200     }
 201
 202     return fd;
 203 }
 204
 205
 206 int
 207 Process::openOutputFile(const string &filename)
 208 {
 209     int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
 210
 211     if (fd == -1) {
 212         perror(NULL);
 213         cerr << "unable to open \"" << filename << "\" for writing\n";
 214         fatal("can't open output file");
 215     }
 216
 217     return fd;
 218 }
 219
 220 ThreadContext *
 221 Process::findFreeContext()
 222 {
 223     int size = contextIds.size();
 224     ThreadContext *tc;
 225     for (int i = 0; i < size; ++i) {
 226         tc = system->getThreadContext(contextIds[i]);
 227         if (tc->status() == ThreadContext::Halted) {
 228             // inactive context, free to use
 229             return tc;
 230         }
 231     }
 232     return NULL;
 233 }
 234
 235 void
 236 Process::initState()
 237 {
 238     if (contextIds.empty())
 239         fatal("Process %s is not associated with any HW contexts!\n", name());
 240
 241     // first thread context for this process... initialize & enable
 242     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 243
 244     // mark this context as active so it will start ticking.
 245     tc->activate(0);
 246
 247     Port *mem_port;
 248     mem_port = system->physmem->getPort("functional");
 249     initVirtMem = new TranslatingPort("process init port", this,
 250             TranslatingPort::Always);
 251     mem_port->setPeer(initVirtMem);
 252     initVirtMem->setPeer(mem_port);
 253 }
 254
 255 // map simulator fd sim_fd to target fd tgt_fd
 256 void
 257 Process::dup_fd(int sim_fd, int tgt_fd)
 258 {
 259     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 260         panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
 261
 262     Process::FdMap *fdo = &fd_map[tgt_fd];
 263     fdo->fd = sim_fd;
 264 }
 265
 266
 267 // generate new target fd for sim_fd
 268 int
 269 Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
 270 {
 271     // in case open() returns an error, don't allocate a new fd
 272     if (sim_fd == -1)
 273         return -1;
 274
 275     // find first free target fd
 276     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 277         Process::FdMap *fdo = &fd_map[free_fd];
 278         if (fdo->fd == -1) {
 279             fdo->fd = sim_fd;
 280             fdo->filename = filename;
 281             fdo->mode = mode;
 282             fdo->fileOffset = 0;
 283             fdo->flags = flags;
 284             fdo->isPipe = pipe;
 285             fdo->readPipeSource = 0;
 286             return free_fd;
 287         }
 288     }
 289
 290     panic("Process::alloc_fd: out of file descriptors!");
 291 }
 292
 293
 294 // free target fd (e.g., after close)
 295 void
 296 Process::free_fd(int tgt_fd)
 297 {
 298     Process::FdMap *fdo = &fd_map[tgt_fd];
 299     if (fdo->fd == -1)
 300         warn("Process::free_fd: request to free unused fd %d", tgt_fd);
 301
 302     fdo->fd = -1;
 303     fdo->filename = "NULL";
 304     fdo->mode = 0;
 305     fdo->fileOffset = 0;
 306     fdo->flags = 0;
 307     fdo->isPipe = false;
 308     fdo->readPipeSource = 0;
 309 }
 310
 311
 312 // look up simulator fd for given target fd
 313 int
 314 Process::sim_fd(int tgt_fd)
 315 {
 316     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 317         return -1;
 318
 319     return fd_map[tgt_fd].fd;
 320 }
 321
 322 Process::FdMap *
 323 Process::sim_fd_obj(int tgt_fd)
 324 {
 325     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 326         return NULL;
 327
 328     return &fd_map[tgt_fd];
 329 }
 330
 331 bool
 332 Process::fixupStackFault(Addr vaddr)
 333 {
 334     // Check if this is already on the stack and there's just no page there
 335     // yet.
 336     if (vaddr >= stack_min && vaddr < stack_base) {
 337         pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
 338         return true;
 339     }
 340
 341     // We've accessed the next page of the stack, so extend it to include
 342     // this address.
 343     if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
 344         while (vaddr < stack_min) {
 345             stack_min -= TheISA::PageBytes;
 346             if (stack_base - stack_min > max_stack_size)
 347                 fatal("Maximum stack size exceeded\n");
 348             if (stack_base - stack_min > 8 * 1024 * 1024)
 349                 fatal("Over max stack size for one thread\n");
 350             pTable->allocate(stack_min, TheISA::PageBytes);
 351             inform("Increasing stack size by one page.");
 352         };
 353         return true;
 354     }
 355     warn("Not extending stack: address %#x isn't at the end of the stack.",
 356         vaddr);
 357     return false;
 358 }
 359
 360 // find all offsets for currently open files and save them
 361 void
 362 Process::fix_file_offsets()
 363 {
 364     Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
 365     Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
 366     Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
 367     string in = fdo_stdin->filename;
 368     string out = fdo_stdout->filename;
 369     string err = fdo_stderr->filename;
 370
 371     // initialize file descriptors to default: same as simulator
 372     int stdin_fd, stdout_fd, stderr_fd;
 373
 374     if (in == "stdin" || in == "cin")
 375         stdin_fd = STDIN_FILENO;
 376     else if (in == "None")
 377         stdin_fd = -1;
 378     else {
 379         // open standard in and seek to the right location
 380         stdin_fd = Process::openInputFile(in);
 381         if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
 382             panic("Unable to seek to correct location in file: %s", in);
 383     }
 384
 385     if (out == "stdout" || out == "cout")
 386         stdout_fd = STDOUT_FILENO;
 387     else if (out == "stderr" || out == "cerr")
 388         stdout_fd = STDERR_FILENO;
 389     else if (out == "None")
 390         stdout_fd = -1;
 391     else {
 392         stdout_fd = Process::openOutputFile(out);
 393         if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
 394             panic("Unable to seek to correct location in file: %s", out);
 395     }
 396
 397     if (err == "stdout" || err == "cout")
 398         stderr_fd = STDOUT_FILENO;
 399     else if (err == "stderr" || err == "cerr")
 400         stderr_fd = STDERR_FILENO;
 401     else if (err == "None")
 402         stderr_fd = -1;
 403     else if (err == out)
 404         stderr_fd = stdout_fd;
 405     else {
 406         stderr_fd = Process::openOutputFile(err);
 407         if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
 408             panic("Unable to seek to correct location in file: %s", err);
 409     }
 410
 411     fdo_stdin->fd = stdin_fd;
 412     fdo_stdout->fd = stdout_fd;
 413     fdo_stderr->fd = stderr_fd;
 414
 415
 416     for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
 417         Process::FdMap *fdo = &fd_map[free_fd];
 418         if (fdo->fd != -1) {
 419             if (fdo->isPipe){
 420                 if (fdo->filename == "PIPE-WRITE")
 421                     continue;
 422                 else {
 423                     assert (fdo->filename == "PIPE-READ");
 424                     //create a new pipe
 425                     int fds[2];
 426                     int pipe_retval = pipe(fds);
 427
 428                     if (pipe_retval < 0) {
 429                         // error
 430                         panic("Unable to create new pipe.");
 431                     }
 432                     fdo->fd = fds[0]; //set read pipe
 433                     Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
 434                     if (fdo_write->filename != "PIPE-WRITE")
 435                         panic ("Couldn't find write end of the pipe");
 436
 437                     fdo_write->fd = fds[1];//set write pipe
 438                }
 439             } else {
 440                 //Open file
 441                 int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
 442
 443                 if (fd == -1)
 444                     panic("Unable to open file: %s", fdo->filename);
 445                 fdo->fd = fd;
 446
 447                 //Seek to correct location before checkpoint
 448                 if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
 449                     panic("Unable to seek to correct location in file: %s",
 450                           fdo->filename);
 451             }
 452         }
 453     }
 454 }
 455
 456 void
 457 Process::find_file_offsets()
 458 {
 459     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 460         Process::FdMap *fdo = &fd_map[free_fd];
 461         if (fdo->fd != -1) {
 462             fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
 463         } else {
 464                 fdo->filename = "NULL";
 465                 fdo->fileOffset = 0;
 466         }
 467     }
 468 }
 469
 470 void
 471 Process::setReadPipeSource(int read_pipe_fd, int source_fd)
 472 {
 473     Process::FdMap *fdo = &fd_map[read_pipe_fd];
 474     fdo->readPipeSource = source_fd;
 475 }
 476
 477 void
 478 Process::FdMap::serialize(std::ostream &os)
 479 {
 480     SERIALIZE_SCALAR(fd);
 481     SERIALIZE_SCALAR(isPipe);
 482     SERIALIZE_SCALAR(filename);
 483     SERIALIZE_SCALAR(flags);
 484     SERIALIZE_SCALAR(readPipeSource);
 485     SERIALIZE_SCALAR(fileOffset);
 486 }
 487
 488 void
 489 Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
 490 {
 491     UNSERIALIZE_SCALAR(fd);
 492     UNSERIALIZE_SCALAR(isPipe);
 493     UNSERIALIZE_SCALAR(filename);
 494     UNSERIALIZE_SCALAR(flags);
 495     UNSERIALIZE_SCALAR(readPipeSource);
 496     UNSERIALIZE_SCALAR(fileOffset);
 497 }
 498
 499 void
 500 Process::serialize(std::ostream &os)
 501 {
 502     SERIALIZE_SCALAR(brk_point);
 503     SERIALIZE_SCALAR(stack_base);
 504     SERIALIZE_SCALAR(stack_size);
 505     SERIALIZE_SCALAR(stack_min);
 506     SERIALIZE_SCALAR(next_thread_stack_base);
 507     SERIALIZE_SCALAR(mmap_start);
 508     SERIALIZE_SCALAR(mmap_end);
 509     SERIALIZE_SCALAR(nxm_start);
 510     SERIALIZE_SCALAR(nxm_end);
 511     find_file_offsets();
 512     pTable->serialize(os);
 513     for (int x = 0; x <= MAX_FD; x++) {
 514         nameOut(os, csprintf("%s.FdMap%d", name(), x));
 515         fd_map[x].serialize(os);
 516     }
 517     SERIALIZE_SCALAR(M5_pid);
 518
 519 }
 520
 521 void
 522 Process::unserialize(Checkpoint *cp, const std::string &section)
 523 {
 524     UNSERIALIZE_SCALAR(brk_point);
 525     UNSERIALIZE_SCALAR(stack_base);
 526     UNSERIALIZE_SCALAR(stack_size);
 527     UNSERIALIZE_SCALAR(stack_min);
 528     UNSERIALIZE_SCALAR(next_thread_stack_base);
 529     UNSERIALIZE_SCALAR(mmap_start);
 530     UNSERIALIZE_SCALAR(mmap_end);
 531     UNSERIALIZE_SCALAR(nxm_start);
 532     UNSERIALIZE_SCALAR(nxm_end);
 533     pTable->unserialize(cp, section);
 534     for (int x = 0; x <= MAX_FD; x++) {
 535         fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
 536     }
 537     fix_file_offsets();
 538     UNSERIALIZE_OPT_SCALAR(M5_pid);
 539     // The above returns a bool so that you could do something if you don't
 540     // find the param in the checkpoint if you wanted to, like set a default
 541     // but in this case we'll just stick with the instantianted value if not
 542     // found.
 543 }
 544
 545
 546 ////////////////////////////////////////////////////////////////////////
 547 //
 548 // LiveProcess member definitions
 549 //
 550 ////////////////////////////////////////////////////////////////////////
 551
 552
 553 LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
 554     : Process(params), objFile(_objFile),
 555       argv(params->cmd), envp(params->env), cwd(params->cwd)
 556 {
 557     __uid = params->uid;
 558     __euid = params->euid;
 559     __gid = params->gid;
 560     __egid = params->egid;
 561     __pid = params->pid;
 562     __ppid = params->ppid;
 563
 564     prog_fname = params->cmd[0];
 565
 566     // load up symbols, if any... these may be used for debugging or
 567     // profiling.
 568     if (!debugSymbolTable) {
 569         debugSymbolTable = new SymbolTable();
 570         if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
 571             !objFile->loadLocalSymbols(debugSymbolTable)) {
 572             // didn't load any symbols
 573             delete debugSymbolTable;
 574             debugSymbolTable = NULL;
 575         }
 576     }
 577 }
 578
 579 void
 580 LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
 581 {
 582     num_syscalls++;
 583
 584     SyscallDesc *desc = getDesc(callnum);
 585     if (desc == NULL)
 586         fatal("Syscall %d out of range", callnum);
 587
 588     desc->doSyscall(callnum, this, tc);
 589 }
 590
 591 IntReg
 592 LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
 593 {
 594     return getSyscallArg(tc, i);
 595 }
 596
 597 LiveProcess *
 598 LiveProcess::create(LiveProcessParams * params)
 599 {
 600     LiveProcess *process = NULL;
 601
 602     string executable =
 603         params->executable == "" ? params->cmd[0] : params->executable;
 604     ObjectFile *objFile = createObjectFile(executable);
 605     if (objFile == NULL) {
 606         fatal("Can't load object file %s", executable);
 607     }
 608
 609     if (objFile->isDynamic())
 610        fatal("Object file is a dynamic executable however only static "
 611              "executables are supported!\n       Please recompile your "
 612              "executable as a static binary and try again.\n");
 613
 614 #if THE_ISA == ALPHA_ISA
 615     if (objFile->getArch() != ObjectFile::Alpha)
 616         fatal("Object file architecture does not match compiled ISA (Alpha).");
 617
 618     switch (objFile->getOpSys()) {
 619       case ObjectFile::Tru64:
 620         process = new AlphaTru64Process(params, objFile);
 621         break;
 622
 623       case ObjectFile::UnknownOpSys:
 624         warn("Unknown operating system; assuming Linux.");
 625         // fall through
 626       case ObjectFile::Linux:
 627         process = new AlphaLinuxProcess(params, objFile);
 628         break;
 629
 630       default:
 631         fatal("Unknown/unsupported operating system.");
 632     }
 633 #elif THE_ISA == SPARC_ISA
 634     if (objFile->getArch() != ObjectFile::SPARC64 &&
 635         objFile->getArch() != ObjectFile::SPARC32)
 636         fatal("Object file architecture does not match compiled ISA (SPARC).");
 637     switch (objFile->getOpSys()) {
 638       case ObjectFile::UnknownOpSys:
 639         warn("Unknown operating system; assuming Linux.");
 640         // fall through
 641       case ObjectFile::Linux:
 642         if (objFile->getArch() == ObjectFile::SPARC64) {
 643             process = new Sparc64LinuxProcess(params, objFile);
 644         } else {
 645             process = new Sparc32LinuxProcess(params, objFile);
 646         }
 647         break;
 648
 649
 650       case ObjectFile::Solaris:
 651         process = new SparcSolarisProcess(params, objFile);
 652         break;
 653
 654       default:
 655         fatal("Unknown/unsupported operating system.");
 656     }
 657 #elif THE_ISA == X86_ISA
 658     if (objFile->getArch() != ObjectFile::X86_64 &&
 659         objFile->getArch() != ObjectFile::I386)
 660         fatal("Object file architecture does not match compiled ISA (x86).");
 661     switch (objFile->getOpSys()) {
 662       case ObjectFile::UnknownOpSys:
 663         warn("Unknown operating system; assuming Linux.");
 664         // fall through
 665       case ObjectFile::Linux:
 666         if (objFile->getArch() == ObjectFile::X86_64) {
 667             process = new X86_64LinuxProcess(params, objFile);
 668         } else {
 669             process = new I386LinuxProcess(params, objFile);
 670         }
 671         break;
 672
 673       default:
 674         fatal("Unknown/unsupported operating system.");
 675     }
 676 #elif THE_ISA == MIPS_ISA
 677     if (objFile->getArch() != ObjectFile::Mips)
 678         fatal("Object file architecture does not match compiled ISA (MIPS).");
 679     switch (objFile->getOpSys()) {
 680       case ObjectFile::UnknownOpSys:
 681         warn("Unknown operating system; assuming Linux.");
 682         // fall through
 683       case ObjectFile::Linux:
 684         process = new MipsLinuxProcess(params, objFile);
 685         break;
 686
 687       default:
 688         fatal("Unknown/unsupported operating system.");
 689     }
 690 #elif THE_ISA == ARM_ISA
 691     if (objFile->getArch() != ObjectFile::Arm &&
 692         objFile->getArch() != ObjectFile::Thumb)
 693         fatal("Object file architecture does not match compiled ISA (ARM).");
 694     switch (objFile->getOpSys()) {
 695       case ObjectFile::UnknownOpSys:
 696         warn("Unknown operating system; assuming Linux.");
 697         // fall through
 698       case ObjectFile::Linux:
 699         process = new ArmLinuxProcess(params, objFile, objFile->getArch());
 700         break;
 701       case ObjectFile::LinuxArmOABI:
 702         fatal("M5 does not support ARM OABI binaries. Please recompile with an"
 703               " EABI compiler.");
 704       default:
 705         fatal("Unknown/unsupported operating system.");
 706     }
 707 #elif THE_ISA == POWER_ISA
 708     if (objFile->getArch() != ObjectFile::Power)
 709         fatal("Object file architecture does not match compiled ISA (Power).");
 710     switch (objFile->getOpSys()) {
 711       case ObjectFile::UnknownOpSys:
 712         warn("Unknown operating system; assuming Linux.");
 713         // fall through
 714       case ObjectFile::Linux:
 715         process = new PowerLinuxProcess(params, objFile);
 716         break;
 717
 718       default:
 719         fatal("Unknown/unsupported operating system.");
 720     }
 721 #else
 722 #error "THE_ISA not set"
 723 #endif
 724
 725
 726     if (process == NULL)
 727         fatal("Unknown error creating process object.");
 728     return process;
 729 }
 730
 731 LiveProcess *
 732 LiveProcessParams::create()
 733 {
 734     return LiveProcess::create(this);
 735 }