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