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 #include <string>
  36
  37 #include "arch/remote_gdb.hh"
  38 #include "base/intmath.hh"
  39 #include "base/loader/object_file.hh"
  40 #include "base/loader/symtab.hh"
  41 #include "base/statistics.hh"
  42 #include "config/full_system.hh"
  43 #include "cpu/thread_context.hh"
  44 #include "mem/page_table.hh"
  45 #include "mem/physical.hh"
  46 #include "mem/translating_port.hh"
  47 #include "params/Process.hh"
  48 #include "params/LiveProcess.hh"
  49 #include "sim/debug.hh"
  50 #include "sim/process.hh"
  51 #include "sim/process_impl.hh"
  52 #include "sim/stats.hh"
  53 #include "sim/syscall_emul.hh"
  54 #include "sim/system.hh"
  55
  56 #include "arch/isa_specific.hh"
  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 #else
  70 #error "THE_ISA not set"
  71 #endif
  72
  73
  74 using namespace std;
  75 using namespace TheISA;
  76
  77 //
  78 // The purpose of this code is to fake the loader & syscall mechanism
  79 // when there's no OS: thus there's no resone to use it in FULL_SYSTEM
  80 // mode when we do have an OS
  81 //
  82 #if FULL_SYSTEM
  83 #error "process.cc not compatible with FULL_SYSTEM"
  84 #endif
  85
  86 // current number of allocated processes
  87 int num_processes = 0;
  88
  89 Process::Process(ProcessParams * params)
  90     : SimObject(params), system(params->system), checkpointRestored(false),
  91     max_stack_size(params->max_stack_size)
  92 {
  93     string in = params->input;
  94     string out = params->output;
  95     string err = params->errout;
  96
  97     // initialize file descriptors to default: same as simulator
  98     int stdin_fd, stdout_fd, stderr_fd;
  99
 100     if (in == "stdin" || in == "cin")
 101         stdin_fd = STDIN_FILENO;
 102     else if (in == "None")
 103         stdin_fd = -1;
 104     else
 105         stdin_fd = Process::openInputFile(in);
 106
 107     if (out == "stdout" || out == "cout")
 108         stdout_fd = STDOUT_FILENO;
 109     else if (out == "stderr" || out == "cerr")
 110         stdout_fd = STDERR_FILENO;
 111     else if (out == "None")
 112         stdout_fd = -1;
 113     else
 114         stdout_fd = Process::openOutputFile(out);
 115
 116     if (err == "stdout" || err == "cout")
 117         stderr_fd = STDOUT_FILENO;
 118     else if (err == "stderr" || err == "cerr")
 119         stderr_fd = STDERR_FILENO;
 120     else if (err == "None")
 121         stderr_fd = -1;
 122     else if (err == out)
 123         stderr_fd = stdout_fd;
 124     else
 125         stderr_fd = Process::openOutputFile(err);
 126
 127     M5_pid = system->allocatePID();
 128     // initialize first 3 fds (stdin, stdout, stderr)
 129     Process::FdMap *fdo = &fd_map[STDIN_FILENO];
 130     fdo->fd = stdin_fd;
 131     fdo->filename = in;
 132     fdo->flags = O_RDONLY;
 133     fdo->mode = -1;
 134     fdo->fileOffset = 0;
 135
 136     fdo =  &fd_map[STDOUT_FILENO];
 137     fdo->fd = stdout_fd;
 138     fdo->filename = out;
 139     fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
 140     fdo->mode = 0774;
 141     fdo->fileOffset = 0;
 142
 143     fdo = &fd_map[STDERR_FILENO];
 144     fdo->fd = stderr_fd;
 145     fdo->filename = err;
 146     fdo->flags = O_WRONLY;
 147     fdo->mode = -1;
 148     fdo->fileOffset = 0;
 149
 150
 151     // mark remaining fds as free
 152     for (int i = 3; i <= MAX_FD; ++i) {
 153         Process::FdMap *fdo = &fd_map[i];
 154         fdo->fd = -1;
 155     }
 156
 157     mmap_start = mmap_end = 0;
 158     nxm_start = nxm_end = 0;
 159     pTable = new PageTable(this);
 160     // other parameters will be initialized when the program is loaded
 161 }
 162
 163
 164 void
 165 Process::regStats()
 166 {
 167     using namespace Stats;
 168
 169     num_syscalls
 170         .name(name() + ".PROG:num_syscalls")
 171         .desc("Number of system calls")
 172         ;
 173 }
 174
 175 //
 176 // static helper functions
 177 //
 178 int
 179 Process::openInputFile(const string &filename)
 180 {
 181     int fd = open(filename.c_str(), O_RDONLY);
 182
 183     if (fd == -1) {
 184         perror(NULL);
 185         cerr << "unable to open \"" << filename << "\" for reading\n";
 186         fatal("can't open input file");
 187     }
 188
 189     return fd;
 190 }
 191
 192
 193 int
 194 Process::openOutputFile(const string &filename)
 195 {
 196     int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
 197
 198     if (fd == -1) {
 199         perror(NULL);
 200         cerr << "unable to open \"" << filename << "\" for writing\n";
 201         fatal("can't open output file");
 202     }
 203
 204     return fd;
 205 }
 206
 207 ThreadContext *
 208 Process::findFreeContext()
 209 {
 210     int size = contextIds.size();
 211     ThreadContext *tc;
 212     for (int i = 0; i < size; ++i) {
 213         tc = system->getThreadContext(contextIds[i]);
 214         if (tc->status() == ThreadContext::Unallocated) {
 215             // inactive context, free to use
 216             return tc;
 217         }
 218     }
 219     return NULL;
 220 }
 221
 222 void
 223 Process::startup()
 224 {
 225     if (contextIds.empty())
 226         fatal("Process %s is not associated with any HW contexts!\n", name());
 227
 228     // first thread context for this process... initialize & enable
 229     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 230
 231     // mark this context as active so it will start ticking.
 232     tc->activate(0);
 233
 234     Port *mem_port;
 235     mem_port = system->physmem->getPort("functional");
 236     initVirtMem = new TranslatingPort("process init port", this,
 237             TranslatingPort::Always);
 238     mem_port->setPeer(initVirtMem);
 239     initVirtMem->setPeer(mem_port);
 240 }
 241
 242 // map simulator fd sim_fd to target fd tgt_fd
 243 void
 244 Process::dup_fd(int sim_fd, int tgt_fd)
 245 {
 246     if (tgt_fd < 0 || tgt_fd > MAX_FD)
 247         panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
 248
 249     Process::FdMap *fdo = &fd_map[tgt_fd];
 250     fdo->fd = sim_fd;
 251 }
 252
 253
 254 // generate new target fd for sim_fd
 255 int
 256 Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
 257 {
 258     // in case open() returns an error, don't allocate a new fd
 259     if (sim_fd == -1)
 260         return -1;
 261
 262     // find first free target fd
 263     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 264         Process::FdMap *fdo = &fd_map[free_fd];
 265         if (fdo->fd == -1) {
 266             fdo->fd = sim_fd;
 267             fdo->filename = filename;
 268             fdo->mode = mode;
 269             fdo->fileOffset = 0;
 270             fdo->flags = flags;
 271             fdo->isPipe = pipe;
 272             fdo->readPipeSource = 0;
 273             return free_fd;
 274         }
 275     }
 276
 277     panic("Process::alloc_fd: out of file descriptors!");
 278 }
 279
 280
 281 // free target fd (e.g., after close)
 282 void
 283 Process::free_fd(int tgt_fd)
 284 {
 285     Process::FdMap *fdo = &fd_map[tgt_fd];
 286     if (fdo->fd == -1)
 287         warn("Process::free_fd: request to free unused fd %d", tgt_fd);
 288
 289     fdo->fd = -1;
 290     fdo->filename = "NULL";
 291     fdo->mode = 0;
 292     fdo->fileOffset = 0;
 293     fdo->flags = 0;
 294     fdo->isPipe = false;
 295     fdo->readPipeSource = 0;
 296 }
 297
 298
 299 // look up simulator fd for given target fd
 300 int
 301 Process::sim_fd(int tgt_fd)
 302 {
 303     if (tgt_fd > MAX_FD)
 304         return -1;
 305
 306     return fd_map[tgt_fd].fd;
 307 }
 308
 309 Process::FdMap *
 310 Process::sim_fd_obj(int tgt_fd)
 311 {
 312     if (tgt_fd > MAX_FD)
 313         panic("sim_fd_obj called in fd out of range.");
 314
 315     return &fd_map[tgt_fd];
 316 }
 317 bool
 318 Process::checkAndAllocNextPage(Addr vaddr)
 319 {
 320     // if this is an initial write we might not have
 321     if (vaddr >= stack_min && vaddr < stack_base) {
 322         pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
 323         return true;
 324     }
 325
 326     // We've accessed the next page of the stack, so extend the stack
 327     // to cover it.
 328     if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
 329         while (vaddr < stack_min) {
 330             stack_min -= TheISA::PageBytes;
 331             if(stack_base - stack_min > max_stack_size)
 332                 fatal("Maximum stack size exceeded\n");
 333             if(stack_base - stack_min > 8*1024*1024)
 334                 fatal("Over max stack size for one thread\n");
 335             pTable->allocate(stack_min, TheISA::PageBytes);
 336             warn("Increasing stack size by one page.");
 337         };
 338         return true;
 339     }
 340     return false;
 341 }
 342
 343  // find all offsets for currently open files and save them
 344 void
 345 Process::fix_file_offsets() {
 346     Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
 347     Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
 348     Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
 349     string in = fdo_stdin->filename;
 350     string out = fdo_stdout->filename;
 351     string err = fdo_stderr->filename;
 352
 353     // initialize file descriptors to default: same as simulator
 354     int stdin_fd, stdout_fd, stderr_fd;
 355
 356     if (in == "stdin" || in == "cin")
 357         stdin_fd = STDIN_FILENO;
 358     else if (in == "None")
 359         stdin_fd = -1;
 360     else{
 361         //OPEN standard in and seek to the right location
 362         stdin_fd = Process::openInputFile(in);
 363         if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
 364             panic("Unable to seek to correct location in file: %s", in);
 365     }
 366
 367     if (out == "stdout" || out == "cout")
 368         stdout_fd = STDOUT_FILENO;
 369     else if (out == "stderr" || out == "cerr")
 370         stdout_fd = STDERR_FILENO;
 371     else if (out == "None")
 372         stdout_fd = -1;
 373     else{
 374         stdout_fd = Process::openOutputFile(out);
 375         if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
 376             panic("Unable to seek to correct location in file: %s", out);
 377     }
 378
 379     if (err == "stdout" || err == "cout")
 380         stderr_fd = STDOUT_FILENO;
 381     else if (err == "stderr" || err == "cerr")
 382         stderr_fd = STDERR_FILENO;
 383     else if (err == "None")
 384         stderr_fd = -1;
 385     else if (err == out)
 386         stderr_fd = stdout_fd;
 387     else {
 388         stderr_fd = Process::openOutputFile(err);
 389         if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
 390             panic("Unable to seek to correct location in file: %s", err);
 391     }
 392
 393     fdo_stdin->fd = stdin_fd;
 394     fdo_stdout->fd = stdout_fd;
 395     fdo_stderr->fd = stderr_fd;
 396
 397
 398     for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
 399         Process::FdMap *fdo = &fd_map[free_fd];
 400         if (fdo->fd != -1) {
 401             if (fdo->isPipe){
 402                 if (fdo->filename == "PIPE-WRITE")
 403                     continue;
 404                 else {
 405                     assert (fdo->filename == "PIPE-READ");
 406                     //create a new pipe
 407                     int fds[2];
 408                     int pipe_retval = pipe(fds);
 409
 410                     if (pipe_retval < 0) {
 411                         // error
 412                         panic("Unable to create new pipe.");
 413                     }
 414                     fdo->fd = fds[0]; //set read pipe
 415                     Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
 416                     if (fdo_write->filename != "PIPE-WRITE")
 417                         panic ("Couldn't find write end of the pipe");
 418
 419                     fdo_write->fd = fds[1];//set write pipe
 420                }
 421             } else {
 422                 //Open file
 423                 int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
 424
 425                 if (fd == -1)
 426                     panic("Unable to open file: %s", fdo->filename);
 427                 fdo->fd = fd;
 428
 429                 //Seek to correct location before checkpoint
 430                 if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
 431                     panic("Unable to seek to correct location in file: %s", fdo->filename);
 432             }
 433         }
 434     }
 435 }
 436 void
 437 Process::find_file_offsets(){
 438     for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
 439         Process::FdMap *fdo = &fd_map[free_fd];
 440         if (fdo->fd != -1) {
 441             fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
 442         }  else {
 443                 fdo->filename = "NULL";
 444                 fdo->fileOffset = 0;
 445         }
 446     }
 447 }
 448
 449 void
 450 Process::setReadPipeSource(int read_pipe_fd, int source_fd){
 451     Process::FdMap *fdo = &fd_map[read_pipe_fd];
 452     fdo->readPipeSource = source_fd;
 453 }
 454
 455 void
 456 Process::FdMap::serialize(std::ostream &os)
 457 {
 458     SERIALIZE_SCALAR(fd);
 459     SERIALIZE_SCALAR(isPipe);
 460     SERIALIZE_SCALAR(filename);
 461     SERIALIZE_SCALAR(flags);
 462     SERIALIZE_SCALAR(readPipeSource);
 463     SERIALIZE_SCALAR(fileOffset);
 464 }
 465
 466 void
 467 Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
 468 {
 469     UNSERIALIZE_SCALAR(fd);
 470     UNSERIALIZE_SCALAR(isPipe);
 471     UNSERIALIZE_SCALAR(filename);
 472     UNSERIALIZE_SCALAR(flags);
 473     UNSERIALIZE_SCALAR(readPipeSource);
 474     UNSERIALIZE_SCALAR(fileOffset);
 475 }
 476
 477 void
 478 Process::serialize(std::ostream &os)
 479 {
 480     SERIALIZE_SCALAR(initialContextLoaded);
 481     SERIALIZE_SCALAR(brk_point);
 482     SERIALIZE_SCALAR(stack_base);
 483     SERIALIZE_SCALAR(stack_size);
 484     SERIALIZE_SCALAR(stack_min);
 485     SERIALIZE_SCALAR(next_thread_stack_base);
 486     SERIALIZE_SCALAR(mmap_start);
 487     SERIALIZE_SCALAR(mmap_end);
 488     SERIALIZE_SCALAR(nxm_start);
 489     SERIALIZE_SCALAR(nxm_end);
 490     find_file_offsets();
 491     pTable->serialize(os);
 492     for (int x = 0; x <= MAX_FD; x++) {
 493         nameOut(os, csprintf("%s.FdMap%d", name(), x));
 494         fd_map[x].serialize(os);
 495     }
 496
 497 }
 498
 499 void
 500 Process::unserialize(Checkpoint *cp, const std::string &section)
 501 {
 502     UNSERIALIZE_SCALAR(initialContextLoaded);
 503     UNSERIALIZE_SCALAR(brk_point);
 504     UNSERIALIZE_SCALAR(stack_base);
 505     UNSERIALIZE_SCALAR(stack_size);
 506     UNSERIALIZE_SCALAR(stack_min);
 507     UNSERIALIZE_SCALAR(next_thread_stack_base);
 508     UNSERIALIZE_SCALAR(mmap_start);
 509     UNSERIALIZE_SCALAR(mmap_end);
 510     UNSERIALIZE_SCALAR(nxm_start);
 511     UNSERIALIZE_SCALAR(nxm_end);
 512     pTable->unserialize(cp, section);
 513     for (int x = 0; x <= MAX_FD; x++) {
 514         fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
 515      }
 516     fix_file_offsets();
 517
 518     checkpointRestored = true;
 519
 520 }
 521
 522
 523 ////////////////////////////////////////////////////////////////////////
 524 //
 525 // LiveProcess member definitions
 526 //
 527 ////////////////////////////////////////////////////////////////////////
 528
 529
 530 LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
 531     : Process(params), objFile(_objFile),
 532       argv(params->cmd), envp(params->env), cwd(params->cwd)
 533 {
 534     __uid = params->uid;
 535     __euid = params->euid;
 536     __gid = params->gid;
 537     __egid = params->egid;
 538     __pid = params->pid;
 539     __ppid = params->ppid;
 540
 541     prog_fname = params->cmd[0];
 542
 543     // load up symbols, if any... these may be used for debugging or
 544     // profiling.
 545     if (!debugSymbolTable) {
 546         debugSymbolTable = new SymbolTable();
 547         if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
 548             !objFile->loadLocalSymbols(debugSymbolTable)) {
 549             // didn't load any symbols
 550             delete debugSymbolTable;
 551             debugSymbolTable = NULL;
 552         }
 553     }
 554 }
 555
 556 void
 557 LiveProcess::argsInit(int intSize, int pageSize)
 558 {
 559     Process::startup();
 560
 561     // load object file into target memory
 562     objFile->loadSections(initVirtMem);
 563
 564     // Calculate how much space we need for arg & env arrays.
 565     int argv_array_size = intSize * (argv.size() + 1);
 566     int envp_array_size = intSize * (envp.size() + 1);
 567     int arg_data_size = 0;
 568     for (int i = 0; i < argv.size(); ++i) {
 569         arg_data_size += argv[i].size() + 1;
 570     }
 571     int env_data_size = 0;
 572     for (int i = 0; i < envp.size(); ++i) {
 573         env_data_size += envp[i].size() + 1;
 574     }
 575
 576     int space_needed =
 577         argv_array_size + envp_array_size + arg_data_size + env_data_size;
 578     if (space_needed < 32*1024)
 579         space_needed = 32*1024;
 580
 581     // set bottom of stack
 582     stack_min = stack_base - space_needed;
 583     // align it
 584     stack_min = roundDown(stack_min, pageSize);
 585     stack_size = stack_base - stack_min;
 586     // map memory
 587     pTable->allocate(stack_min, roundUp(stack_size, pageSize));
 588
 589     // map out initial stack contents
 590     Addr argv_array_base = stack_min + intSize; // room for argc
 591     Addr envp_array_base = argv_array_base + argv_array_size;
 592     Addr arg_data_base = envp_array_base + envp_array_size;
 593     Addr env_data_base = arg_data_base + arg_data_size;
 594
 595     // write contents to stack
 596     uint64_t argc = argv.size();
 597     if (intSize == 8)
 598         argc = htog((uint64_t)argc);
 599     else if (intSize == 4)
 600         argc = htog((uint32_t)argc);
 601     else
 602         panic("Unknown int size");
 603
 604     initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
 605
 606     copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
 607     copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
 608
 609     assert(NumArgumentRegs >= 2);
 610
 611     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 612
 613     tc->setIntReg(ArgumentReg[0], argc);
 614     tc->setIntReg(ArgumentReg[1], argv_array_base);
 615     tc->setIntReg(StackPointerReg, stack_min);
 616
 617     Addr prog_entry = objFile->entryPoint();
 618     tc->setPC(prog_entry);
 619     tc->setNextPC(prog_entry + sizeof(MachInst));
 620
 621 #if THE_ISA != ALPHA_ISA //e.g. MIPS or Sparc
 622     tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
 623 #endif
 624
 625     num_processes++;
 626 }
 627
 628 void
 629 LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
 630 {
 631     num_syscalls++;
 632
 633     SyscallDesc *desc = getDesc(callnum);
 634     if (desc == NULL)
 635         fatal("Syscall %d out of range", callnum);
 636
 637     desc->doSyscall(callnum, this, tc);
 638 }
 639
 640 LiveProcess *
 641 LiveProcess::create(LiveProcessParams * params)
 642 {
 643     LiveProcess *process = NULL;
 644
 645     string executable =
 646         params->executable == "" ? params->cmd[0] : params->executable;
 647     ObjectFile *objFile = createObjectFile(executable);
 648     if (objFile == NULL) {
 649         fatal("Can't load object file %s", executable);
 650     }
 651
 652     if (objFile->isDynamic())
 653        fatal("Object file is a dynamic executable however only static "
 654              "executables are supported!\n       Please recompile your "
 655              "executable as a static binary and try again.\n");
 656
 657 #if THE_ISA == ALPHA_ISA
 658     if (objFile->getArch() != ObjectFile::Alpha)
 659         fatal("Object file architecture does not match compiled ISA (Alpha).");
 660
 661     if (objFile->hasTLS())
 662         fatal("Object file has a TLS section and single threaded TLS is not\n"
 663               "       currently supported for Alpha! Please recompile your "
 664               "executable with \n       a non-TLS toolchain.\n");
 665
 666     switch (objFile->getOpSys()) {
 667       case ObjectFile::Tru64:
 668         process = new AlphaTru64Process(params, objFile);
 669         break;
 670
 671       case ObjectFile::UnknownOpSys:
 672         warn("Unknown operating system; assuming Linux.");
 673         // fall through
 674       case ObjectFile::Linux:
 675         process = new AlphaLinuxProcess(params, objFile);
 676         break;
 677
 678       default:
 679         fatal("Unknown/unsupported operating system.");
 680     }
 681 #elif THE_ISA == SPARC_ISA
 682     if (objFile->getArch() != ObjectFile::SPARC64 &&
 683         objFile->getArch() != ObjectFile::SPARC32)
 684         fatal("Object file architecture does not match compiled ISA (SPARC).");
 685     switch (objFile->getOpSys()) {
 686       case ObjectFile::UnknownOpSys:
 687         warn("Unknown operating system; assuming Linux.");
 688         // fall through
 689       case ObjectFile::Linux:
 690         if (objFile->getArch() == ObjectFile::SPARC64) {
 691             process = new Sparc64LinuxProcess(params, objFile);
 692         } else {
 693             process = new Sparc32LinuxProcess(params, objFile);
 694         }
 695         break;
 696
 697
 698       case ObjectFile::Solaris:
 699         process = new SparcSolarisProcess(params, objFile);
 700         break;
 701
 702       default:
 703         fatal("Unknown/unsupported operating system.");
 704     }
 705 #elif THE_ISA == X86_ISA
 706     if (objFile->getArch() != ObjectFile::X86)
 707         fatal("Object file architecture does not match compiled ISA (x86).");
 708     switch (objFile->getOpSys()) {
 709       case ObjectFile::UnknownOpSys:
 710         warn("Unknown operating system; assuming Linux.");
 711         // fall through
 712       case ObjectFile::Linux:
 713         process = new X86LinuxProcess(params, objFile);
 714         break;
 715
 716       default:
 717         fatal("Unknown/unsupported operating system.");
 718     }
 719 #elif THE_ISA == MIPS_ISA
 720     if (objFile->getArch() != ObjectFile::Mips)
 721         fatal("Object file architecture does not match compiled ISA (MIPS).");
 722     switch (objFile->getOpSys()) {
 723       case ObjectFile::UnknownOpSys:
 724         warn("Unknown operating system; assuming Linux.");
 725         // fall through
 726       case ObjectFile::Linux:
 727         process = new MipsLinuxProcess(params, objFile);
 728         break;
 729
 730       default:
 731         fatal("Unknown/unsupported operating system.");
 732     }
 733 #elif THE_ISA == ARM_ISA
 734     if (objFile->getArch() != ObjectFile::Arm)
 735         fatal("Object file architecture does not match compiled ISA (ARM).");
 736     switch (objFile->getOpSys()) {
 737       case ObjectFile::UnknownOpSys:
 738         warn("Unknown operating system; assuming Linux.");
 739         // fall through
 740       case ObjectFile::Linux:
 741         process = new ArmLinuxProcess(params, objFile);
 742         break;
 743
 744       default:
 745         fatal("Unknown/unsupported operating system.");
 746     }
 747 #else
 748 #error "THE_ISA not set"
 749 #endif
 750
 751
 752     if (process == NULL)
 753         fatal("Unknown error creating process object.");
 754     return process;
 755 }
 756
 757 LiveProcess *
 758 LiveProcessParams::create()
 759 {
 760     return LiveProcess::create(this);
 761 }