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 <unistd.h>
  34 #include <fcntl.h>
  35
  36 #include <cstdio>
  37 #include <string>
  38
  39 #include "arch/remote_gdb.hh"
  40 #include "base/intmath.hh"
  41 #include "base/loader/object_file.hh"
  42 #include "base/loader/symtab.hh"
  43 #include "base/statistics.hh"
  44 #include "config/full_system.hh"
  45 #include "config/the_isa.hh"
  46 #include "cpu/thread_context.hh"
  47 #include "mem/page_table.hh"
  48 #include "mem/physical.hh"
  49 #include "mem/translating_port.hh"
  50 #include "params/Process.hh"
  51 #include "params/LiveProcess.hh"
  52 #include "sim/debug.hh"
  53 #include "sim/process.hh"
  54 #include "sim/process_impl.hh"
  55 #include "sim/stats.hh"
  56 #include "sim/syscall_emul.hh"
  57 #include "sim/system.hh"
  58
  59 #if THE_ISA == ALPHA_ISA
  60 #include "arch/alpha/linux/process.hh"
  61 #include "arch/alpha/tru64/process.hh"
  62 #elif THE_ISA == SPARC_ISA
  63 #include "arch/sparc/linux/process.hh"
  64 #include "arch/sparc/solaris/process.hh"
  65 #elif THE_ISA == MIPS_ISA
  66 #include "arch/mips/linux/process.hh"
  67 #elif THE_ISA == ARM_ISA
  68 #include "arch/arm/linux/process.hh"
  69 #elif THE_ISA == X86_ISA
  70 #include "arch/x86/linux/process.hh"
  71 #elif THE_ISA == POWER_ISA
  72 #include "arch/power/linux/process.hh"
  73 #else
  74 #error "THE_ISA not set"
  75 #endif
  76
  77
  78 using namespace std;
  79 using namespace TheISA;
  80
  81 //
  82 // The purpose of this code is to fake the loader & syscall mechanism
  83 // when there's no OS: thus there's no resone to use it in FULL_SYSTEM
  84 // mode when we do have an OS
  85 //
  86 #if FULL_SYSTEM
  87 #error "process.cc not compatible with FULL_SYSTEM"
  88 #endif
  89
  90 // current number of allocated processes
  91 int num_processes = 0;
  92
  93 template<class IntType>
  94 AuxVector<IntType>::AuxVector(IntType type, IntType val)
  95 {
  96     a_type = TheISA::htog(type);
  97     a_val = TheISA::htog(val);
  98 }
  99
 100 template class AuxVector<uint32_t>;
 101 template class AuxVector<uint64_t>;
 102
 103 Process::Process(ProcessParams * params)
 104     : SimObject(params), system(params->system), checkpointRestored(false),
 105     max_stack_size(params->max_stack_size)
 106 {
 107     string in = params->input;
 108     string out = params->output;
 109     string err = params->errout;
 110
 111     // initialize file descriptors to default: same as simulator
 112     int stdin_fd, stdout_fd, stderr_fd;
 113
 114     if (in == "stdin" || in == "cin")
 115         stdin_fd = STDIN_FILENO;
 116     else if (in == "None")
 117         stdin_fd = -1;
 118     else
 119         stdin_fd = Process::openInputFile(in);
 120
 121     if (out == "stdout" || out == "cout")
 122         stdout_fd = STDOUT_FILENO;
 123     else if (out == "stderr" || out == "cerr")
 124         stdout_fd = STDERR_FILENO;
 125     else if (out == "None")
 126         stdout_fd = -1;
 127     else
 128         stdout_fd = Process::openOutputFile(out);
 129
 130     if (err == "stdout" || err == "cout")
 131         stderr_fd = STDOUT_FILENO;
 132     else if (err == "stderr" || err == "cerr")
 133         stderr_fd = STDERR_FILENO;
 134     else if (err == "None")
 135         stderr_fd = -1;
 136     else if (err == out)
 137         stderr_fd = stdout_fd;
 138     else
 139         stderr_fd = Process::openOutputFile(err);
 140
 141     M5_pid = system->allocatePID();
 142     // initialize first 3 fds (stdin, stdout, stderr)
 143     Process::FdMap *fdo = &fd_map[STDIN_FILENO];
 144     fdo->fd = stdin_fd;
 145     fdo->filename = in;
 146     fdo->flags = O_RDONLY;
 147     fdo->mode = -1;
 148     fdo->fileOffset = 0;
 149
 150     fdo =  &fd_map[STDOUT_FILENO];
 151     fdo->fd = stdout_fd;
 152     fdo->filename = out;
 153     fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
 154     fdo->mode = 0774;
 155     fdo->fileOffset = 0;
 156
 157     fdo = &fd_map[STDERR_FILENO];
 158     fdo->fd = stderr_fd;
 159     fdo->filename = err;
 160     fdo->flags = O_WRONLY;
 161     fdo->mode = -1;
 162     fdo->fileOffset = 0;
 163
 164
 165     // mark remaining fds as free
 166     for (int i = 3; i <= MAX_FD; ++i) {
 167         Process::FdMap *fdo = &fd_map[i];
 168         fdo->fd = -1;
 169     }
 170
 171     mmap_start = mmap_end = 0;
 172     nxm_start = nxm_end = 0;
 173     pTable = new PageTable(this);
 174     // other parameters will be initialized when the program is loaded
 175 }
 176
 177
 178 void
 179 Process::regStats()
 180 {
 181     using namespace Stats;
 182
 183     num_syscalls
 184         .name(name() + ".PROG:num_syscalls")
 185         .desc("Number of system calls")
 186         ;
 187 }
 188
 189 //
 190 // static helper functions
 191 //
 192 int
 193 Process::openInputFile(const string &filename)
 194 {
 195     int fd = open(filename.c_str(), O_RDONLY);
 196
 197     if (fd == -1) {
 198         perror(NULL);
 199         cerr << "unable to open \"" << filename << "\" for reading\n";
 200         fatal("can't open input file");
 201     }
 202
 203     return fd;
 204 }
 205
 206
 207 int
 208 Process::openOutputFile(const string &filename)
 209 {
 210     int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
 211
 212     if (fd == -1) {
 213         perror(NULL);
 214         cerr << "unable to open \"" << filename << "\" for writing\n";
 215         fatal("can't open output file");
 216     }
 217
 218     return fd;
 219 }
 220
 221 ThreadContext *
 222 Process::findFreeContext()
 223 {
 224     int size = contextIds.size();
 225     ThreadContext *tc;
 226     for (int i = 0; i < size; ++i) {
 227         tc = system->getThreadContext(contextIds[i]);
 228         if (tc->status() == ThreadContext::Halted) {
 229             // inactive context, free to use
 230             return tc;
 231         }
 232     }
 233     return NULL;
 234 }
 235
 236 void
 237 Process::startup()
 238 {
 239     if (contextIds.empty())
 240         fatal("Process %s is not associated with any HW contexts!\n", name());
 241
 242     // first thread context for this process... initialize & enable
 243     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 244
 245     // mark this context as active so it will start ticking.
 246     tc->activate(0);
 247
 248     Port *mem_port;
 249     mem_port = system->physmem->getPort("functional");
 250     initVirtMem = new TranslatingPort("process init port", this,
 251             TranslatingPort::Always);
 252     mem_port->setPeer(initVirtMem);
 253     initVirtMem->setPeer(mem_port);
 254 }
 255
 256 // map simulator fd sim_fd to target fd tgt_fd
 257 void
 258 Process::dup_fd(int sim_fd, int tgt_fd)
 259 {
 260     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 261         panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
 262
 263     Process::FdMap *fdo = &fd_map[tgt_fd];
 264     fdo->fd = sim_fd;
 265 }
 266
 267
 268 // generate new target fd for sim_fd
 269 int
 270 Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
 271 {
 272     // in case open() returns an error, don't allocate a new fd
 273     if (sim_fd == -1)
 274         return -1;
 275
 276     // find first free target fd
 277     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 278         Process::FdMap *fdo = &fd_map[free_fd];
 279         if (fdo->fd == -1) {
 280             fdo->fd = sim_fd;
 281             fdo->filename = filename;
 282             fdo->mode = mode;
 283             fdo->fileOffset = 0;
 284             fdo->flags = flags;
 285             fdo->isPipe = pipe;
 286             fdo->readPipeSource = 0;
 287             return free_fd;
 288         }
 289     }
 290
 291     panic("Process::alloc_fd: out of file descriptors!");
 292 }
 293
 294
 295 // free target fd (e.g., after close)
 296 void
 297 Process::free_fd(int tgt_fd)
 298 {
 299     Process::FdMap *fdo = &fd_map[tgt_fd];
 300     if (fdo->fd == -1)
 301         warn("Process::free_fd: request to free unused fd %d", tgt_fd);
 302
 303     fdo->fd = -1;
 304     fdo->filename = "NULL";
 305     fdo->mode = 0;
 306     fdo->fileOffset = 0;
 307     fdo->flags = 0;
 308     fdo->isPipe = false;
 309     fdo->readPipeSource = 0;
 310 }
 311
 312
 313 // look up simulator fd for given target fd
 314 int
 315 Process::sim_fd(int tgt_fd)
 316 {
 317     if (tgt_fd > MAX_FD)
 318         return -1;
 319
 320     return fd_map[tgt_fd].fd;
 321 }
 322
 323 Process::FdMap *
 324 Process::sim_fd_obj(int tgt_fd)
 325 {
 326     if (tgt_fd > MAX_FD)
 327         panic("sim_fd_obj called in fd out of range.");
 328
 329     return &fd_map[tgt_fd];
 330 }
 331 bool
 332 Process::checkAndAllocNextPage(Addr vaddr)
 333 {
 334     // if this is an initial write we might not have
 335     if (vaddr >= stack_min && vaddr < stack_base) {
 336         pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
 337         return true;
 338     }
 339
 340     // We've accessed the next page of the stack, so extend the stack
 341     // to cover it.
 342     if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
 343         while (vaddr < stack_min) {
 344             stack_min -= TheISA::PageBytes;
 345             if(stack_base - stack_min > max_stack_size)
 346                 fatal("Maximum stack size exceeded\n");
 347             if(stack_base - stack_min > 8*1024*1024)
 348                 fatal("Over max stack size for one thread\n");
 349             pTable->allocate(stack_min, TheISA::PageBytes);
 350             inform("Increasing stack size by one page.");
 351         };
 352         return true;
 353     }
 354     return false;
 355 }
 356
 357  // find all offsets for currently open files and save them
 358 void
 359 Process::fix_file_offsets() {
 360     Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
 361     Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
 362     Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
 363     string in = fdo_stdin->filename;
 364     string out = fdo_stdout->filename;
 365     string err = fdo_stderr->filename;
 366
 367     // initialize file descriptors to default: same as simulator
 368     int stdin_fd, stdout_fd, stderr_fd;
 369
 370     if (in == "stdin" || in == "cin")
 371         stdin_fd = STDIN_FILENO;
 372     else if (in == "None")
 373         stdin_fd = -1;
 374     else{
 375         //OPEN standard in and seek to the right location
 376         stdin_fd = Process::openInputFile(in);
 377         if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
 378             panic("Unable to seek to correct location in file: %s", in);
 379     }
 380
 381     if (out == "stdout" || out == "cout")
 382         stdout_fd = STDOUT_FILENO;
 383     else if (out == "stderr" || out == "cerr")
 384         stdout_fd = STDERR_FILENO;
 385     else if (out == "None")
 386         stdout_fd = -1;
 387     else{
 388         stdout_fd = Process::openOutputFile(out);
 389         if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
 390             panic("Unable to seek to correct location in file: %s", out);
 391     }
 392
 393     if (err == "stdout" || err == "cout")
 394         stderr_fd = STDOUT_FILENO;
 395     else if (err == "stderr" || err == "cerr")
 396         stderr_fd = STDERR_FILENO;
 397     else if (err == "None")
 398         stderr_fd = -1;
 399     else if (err == out)
 400         stderr_fd = stdout_fd;
 401     else {
 402         stderr_fd = Process::openOutputFile(err);
 403         if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
 404             panic("Unable to seek to correct location in file: %s", err);
 405     }
 406
 407     fdo_stdin->fd = stdin_fd;
 408     fdo_stdout->fd = stdout_fd;
 409     fdo_stderr->fd = stderr_fd;
 410
 411
 412     for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
 413         Process::FdMap *fdo = &fd_map[free_fd];
 414         if (fdo->fd != -1) {
 415             if (fdo->isPipe){
 416                 if (fdo->filename == "PIPE-WRITE")
 417                     continue;
 418                 else {
 419                     assert (fdo->filename == "PIPE-READ");
 420                     //create a new pipe
 421                     int fds[2];
 422                     int pipe_retval = pipe(fds);
 423
 424                     if (pipe_retval < 0) {
 425                         // error
 426                         panic("Unable to create new pipe.");
 427                     }
 428                     fdo->fd = fds[0]; //set read pipe
 429                     Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
 430                     if (fdo_write->filename != "PIPE-WRITE")
 431                         panic ("Couldn't find write end of the pipe");
 432
 433                     fdo_write->fd = fds[1];//set write pipe
 434                }
 435             } else {
 436                 //Open file
 437                 int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
 438
 439                 if (fd == -1)
 440                     panic("Unable to open file: %s", fdo->filename);
 441                 fdo->fd = fd;
 442
 443                 //Seek to correct location before checkpoint
 444                 if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
 445                     panic("Unable to seek to correct location in file: %s", fdo->filename);
 446             }
 447         }
 448     }
 449 }
 450 void
 451 Process::find_file_offsets(){
 452     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 453         Process::FdMap *fdo = &fd_map[free_fd];
 454         if (fdo->fd != -1) {
 455             fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
 456         }  else {
 457                 fdo->filename = "NULL";
 458                 fdo->fileOffset = 0;
 459         }
 460     }
 461 }
 462
 463 void
 464 Process::setReadPipeSource(int read_pipe_fd, int source_fd){
 465     Process::FdMap *fdo = &fd_map[read_pipe_fd];
 466     fdo->readPipeSource = source_fd;
 467 }
 468
 469 void
 470 Process::FdMap::serialize(std::ostream &os)
 471 {
 472     SERIALIZE_SCALAR(fd);
 473     SERIALIZE_SCALAR(isPipe);
 474     SERIALIZE_SCALAR(filename);
 475     SERIALIZE_SCALAR(flags);
 476     SERIALIZE_SCALAR(readPipeSource);
 477     SERIALIZE_SCALAR(fileOffset);
 478 }
 479
 480 void
 481 Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
 482 {
 483     UNSERIALIZE_SCALAR(fd);
 484     UNSERIALIZE_SCALAR(isPipe);
 485     UNSERIALIZE_SCALAR(filename);
 486     UNSERIALIZE_SCALAR(flags);
 487     UNSERIALIZE_SCALAR(readPipeSource);
 488     UNSERIALIZE_SCALAR(fileOffset);
 489 }
 490
 491 void
 492 Process::serialize(std::ostream &os)
 493 {
 494     SERIALIZE_SCALAR(initialContextLoaded);
 495     SERIALIZE_SCALAR(brk_point);
 496     SERIALIZE_SCALAR(stack_base);
 497     SERIALIZE_SCALAR(stack_size);
 498     SERIALIZE_SCALAR(stack_min);
 499     SERIALIZE_SCALAR(next_thread_stack_base);
 500     SERIALIZE_SCALAR(mmap_start);
 501     SERIALIZE_SCALAR(mmap_end);
 502     SERIALIZE_SCALAR(nxm_start);
 503     SERIALIZE_SCALAR(nxm_end);
 504     find_file_offsets();
 505     pTable->serialize(os);
 506     for (int x = 0; x <= MAX_FD; x++) {
 507         nameOut(os, csprintf("%s.FdMap%d", name(), x));
 508         fd_map[x].serialize(os);
 509     }
 510     SERIALIZE_SCALAR(M5_pid);
 511
 512 }
 513
 514 void
 515 Process::unserialize(Checkpoint *cp, const std::string &section)
 516 {
 517     UNSERIALIZE_SCALAR(initialContextLoaded);
 518     UNSERIALIZE_SCALAR(brk_point);
 519     UNSERIALIZE_SCALAR(stack_base);
 520     UNSERIALIZE_SCALAR(stack_size);
 521     UNSERIALIZE_SCALAR(stack_min);
 522     UNSERIALIZE_SCALAR(next_thread_stack_base);
 523     UNSERIALIZE_SCALAR(mmap_start);
 524     UNSERIALIZE_SCALAR(mmap_end);
 525     UNSERIALIZE_SCALAR(nxm_start);
 526     UNSERIALIZE_SCALAR(nxm_end);
 527     pTable->unserialize(cp, section);
 528     for (int x = 0; x <= MAX_FD; x++) {
 529         fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
 530      }
 531     fix_file_offsets();
 532     UNSERIALIZE_OPT_SCALAR(M5_pid);
 533     // The above returns a bool so that you could do something if you don't
 534     // find the param in the checkpoint if you wanted to, like set a default
 535     // but in this case we'll just stick with the instantianted value if not
 536     // found.
 537
 538     checkpointRestored = true;
 539
 540 }
 541
 542
 543 ////////////////////////////////////////////////////////////////////////
 544 //
 545 // LiveProcess member definitions
 546 //
 547 ////////////////////////////////////////////////////////////////////////
 548
 549
 550 LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
 551     : Process(params), objFile(_objFile),
 552       argv(params->cmd), envp(params->env), cwd(params->cwd)
 553 {
 554     __uid = params->uid;
 555     __euid = params->euid;
 556     __gid = params->gid;
 557     __egid = params->egid;
 558     __pid = params->pid;
 559     __ppid = params->ppid;
 560
 561     prog_fname = params->cmd[0];
 562
 563     // load up symbols, if any... these may be used for debugging or
 564     // profiling.
 565     if (!debugSymbolTable) {
 566         debugSymbolTable = new SymbolTable();
 567         if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
 568             !objFile->loadLocalSymbols(debugSymbolTable)) {
 569             // didn't load any symbols
 570             delete debugSymbolTable;
 571             debugSymbolTable = NULL;
 572         }
 573     }
 574 }
 575
 576 void
 577 LiveProcess::argsInit(int intSize, int pageSize)
 578 {
 579     Process::startup();
 580
 581     // load object file into target memory
 582     objFile->loadSections(initVirtMem);
 583
 584     // Calculate how much space we need for arg & env arrays.
 585     int argv_array_size = intSize * (argv.size() + 1);
 586     int envp_array_size = intSize * (envp.size() + 1);
 587     int arg_data_size = 0;
 588     for (vector<string>::size_type i = 0; i < argv.size(); ++i) {
 589         arg_data_size += argv[i].size() + 1;
 590     }
 591     int env_data_size = 0;
 592     for (vector<string>::size_type i = 0; i < envp.size(); ++i) {
 593         env_data_size += envp[i].size() + 1;
 594     }
 595
 596     int space_needed =
 597         argv_array_size + envp_array_size + arg_data_size + env_data_size;
 598     if (space_needed < 32*1024)
 599         space_needed = 32*1024;
 600
 601     // set bottom of stack
 602     stack_min = stack_base - space_needed;
 603     // align it
 604     stack_min = roundDown(stack_min, pageSize);
 605     stack_size = stack_base - stack_min;
 606     // map memory
 607     pTable->allocate(stack_min, roundUp(stack_size, pageSize));
 608
 609     // map out initial stack contents
 610     Addr argv_array_base = stack_min + intSize; // room for argc
 611     Addr envp_array_base = argv_array_base + argv_array_size;
 612     Addr arg_data_base = envp_array_base + envp_array_size;
 613     Addr env_data_base = arg_data_base + arg_data_size;
 614
 615     // write contents to stack
 616     uint64_t argc = argv.size();
 617     if (intSize == 8)
 618         argc = htog((uint64_t)argc);
 619     else if (intSize == 4)
 620         argc = htog((uint32_t)argc);
 621     else
 622         panic("Unknown int size");
 623
 624     initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
 625
 626     copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
 627     copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
 628
 629     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 630
 631     setSyscallArg(tc, 0, argc);
 632     setSyscallArg(tc, 1, argv_array_base);
 633     tc->setIntReg(StackPointerReg, stack_min);
 634
 635     Addr prog_entry = objFile->entryPoint();
 636     tc->setPC(prog_entry);
 637     tc->setNextPC(prog_entry + sizeof(MachInst));
 638
 639 #if THE_ISA != ALPHA_ISA && THE_ISA != POWER_ISA //e.g. MIPS or Sparc
 640     tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
 641 #endif
 642
 643     num_processes++;
 644 }
 645
 646 void
 647 LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
 648 {
 649     num_syscalls++;
 650
 651     SyscallDesc *desc = getDesc(callnum);
 652     if (desc == NULL)
 653         fatal("Syscall %d out of range", callnum);
 654
 655     desc->doSyscall(callnum, this, tc);
 656 }
 657
 658 IntReg
 659 LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
 660 {
 661     return getSyscallArg(tc, i);
 662 }
 663
 664 LiveProcess *
 665 LiveProcess::create(LiveProcessParams * params)
 666 {
 667     LiveProcess *process = NULL;
 668
 669     string executable =
 670         params->executable == "" ? params->cmd[0] : params->executable;
 671     ObjectFile *objFile = createObjectFile(executable);
 672     if (objFile == NULL) {
 673         fatal("Can't load object file %s", executable);
 674     }
 675
 676     if (objFile->isDynamic())
 677        fatal("Object file is a dynamic executable however only static "
 678              "executables are supported!\n       Please recompile your "
 679              "executable as a static binary and try again.\n");
 680
 681 #if THE_ISA == ALPHA_ISA
 682     if (objFile->getArch() != ObjectFile::Alpha)
 683         fatal("Object file architecture does not match compiled ISA (Alpha).");
 684
 685     switch (objFile->getOpSys()) {
 686       case ObjectFile::Tru64:
 687         process = new AlphaTru64Process(params, objFile);
 688         break;
 689
 690       case ObjectFile::UnknownOpSys:
 691         warn("Unknown operating system; assuming Linux.");
 692         // fall through
 693       case ObjectFile::Linux:
 694         process = new AlphaLinuxProcess(params, objFile);
 695         break;
 696
 697       default:
 698         fatal("Unknown/unsupported operating system.");
 699     }
 700 #elif THE_ISA == SPARC_ISA
 701     if (objFile->getArch() != ObjectFile::SPARC64 &&
 702         objFile->getArch() != ObjectFile::SPARC32)
 703         fatal("Object file architecture does not match compiled ISA (SPARC).");
 704     switch (objFile->getOpSys()) {
 705       case ObjectFile::UnknownOpSys:
 706         warn("Unknown operating system; assuming Linux.");
 707         // fall through
 708       case ObjectFile::Linux:
 709         if (objFile->getArch() == ObjectFile::SPARC64) {
 710             process = new Sparc64LinuxProcess(params, objFile);
 711         } else {
 712             process = new Sparc32LinuxProcess(params, objFile);
 713         }
 714         break;
 715
 716
 717       case ObjectFile::Solaris:
 718         process = new SparcSolarisProcess(params, objFile);
 719         break;
 720
 721       default:
 722         fatal("Unknown/unsupported operating system.");
 723     }
 724 #elif THE_ISA == X86_ISA
 725     if (objFile->getArch() != ObjectFile::X86_64 &&
 726         objFile->getArch() != ObjectFile::I386)
 727         fatal("Object file architecture does not match compiled ISA (x86).");
 728     switch (objFile->getOpSys()) {
 729       case ObjectFile::UnknownOpSys:
 730         warn("Unknown operating system; assuming Linux.");
 731         // fall through
 732       case ObjectFile::Linux:
 733         if (objFile->getArch() == ObjectFile::X86_64) {
 734             process = new X86_64LinuxProcess(params, objFile);
 735         } else {
 736             process = new I386LinuxProcess(params, objFile);
 737         }
 738         break;
 739
 740       default:
 741         fatal("Unknown/unsupported operating system.");
 742     }
 743 #elif THE_ISA == MIPS_ISA
 744     if (objFile->getArch() != ObjectFile::Mips)
 745         fatal("Object file architecture does not match compiled ISA (MIPS).");
 746     switch (objFile->getOpSys()) {
 747       case ObjectFile::UnknownOpSys:
 748         warn("Unknown operating system; assuming Linux.");
 749         // fall through
 750       case ObjectFile::Linux:
 751         process = new MipsLinuxProcess(params, objFile);
 752         break;
 753
 754       default:
 755         fatal("Unknown/unsupported operating system.");
 756     }
 757 #elif THE_ISA == ARM_ISA
 758     if (objFile->getArch() != ObjectFile::Arm)
 759         fatal("Object file architecture does not match compiled ISA (ARM).");
 760     switch (objFile->getOpSys()) {
 761       case ObjectFile::UnknownOpSys:
 762         warn("Unknown operating system; assuming Linux.");
 763         // fall through
 764       case ObjectFile::Linux:
 765         process = new ArmLinuxProcess(params, objFile);
 766         break;
 767       case ObjectFile::LinuxArmOABI:
 768         fatal("M5 does not support ARM OABI binaries. Please recompile with an"
 769               " EABI compiler.");
 770       default:
 771         fatal("Unknown/unsupported operating system.");
 772     }
 773 #elif THE_ISA == POWER_ISA
 774     if (objFile->getArch() != ObjectFile::Power)
 775         fatal("Object file architecture does not match compiled ISA (Power).");
 776     switch (objFile->getOpSys()) {
 777       case ObjectFile::UnknownOpSys:
 778         warn("Unknown operating system; assuming Linux.");
 779         // fall through
 780       case ObjectFile::Linux:
 781         process = new PowerLinuxProcess(params, objFile);
 782         break;
 783
 784       default:
 785         fatal("Unknown/unsupported operating system.");
 786     }
 787 #else
 788 #error "THE_ISA not set"
 789 #endif
 790
 791
 792     if (process == NULL)
 793         fatal("Unknown error creating process object.");
 794     return process;
 795 }
 796
 797 LiveProcess *
 798 LiveProcessParams::create()
 799 {
 800     return LiveProcess::create(this);
 801 }