process.cc revision 5713 
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
74using namespace std;
75using 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
87int num_processes = 0;
88
89Process::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
164void
165Process::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//
178int
179Process::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
193int
194Process::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
207ThreadContext *
208Process::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
222void
223Process::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
243void
244Process::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
255int
256Process::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)
282void
283Process::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
300int
301Process::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
309Process::FdMap *
310Process::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}
317bool
318Process::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
344void
345Process::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}
436void
437Process::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
449void
450Process::setReadPipeSource(int read_pipe_fd, int source_fd){
451    Process::FdMap *fdo = &fd_map[read_pipe_fd];
452    fdo->readPipeSource = source_fd;
453}
454
455void
456Process::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
466void
467Process::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
477void
478Process::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
499void
500Process::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
530LiveProcess::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
556void
557LiveProcess::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
628void
629LiveProcess::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
640LiveProcess *
641LiveProcess::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->hasTLS())
659        fatal("Object file has a TLS section and single threaded TLS is not\n"
660              "       currently supported for Alpha! Please recompile your "
661              "executable with \n       a non-TLS toolchain.\n");
662
663    if (objFile->getArch() != ObjectFile::Alpha)
664        fatal("Object file architecture does not match compiled ISA (Alpha).");
665    switch (objFile->getOpSys()) {
666      case ObjectFile::Tru64:
667        process = new AlphaTru64Process(params, objFile);
668        break;
669
670      case ObjectFile::Linux:
671        process = new AlphaLinuxProcess(params, objFile);
672        break;
673
674      default:
675        fatal("Unknown/unsupported operating system.");
676    }
677#elif THE_ISA == SPARC_ISA
678    if (objFile->getArch() != ObjectFile::SPARC64 && objFile->getArch() != ObjectFile::SPARC32)
679        fatal("Object file architecture does not match compiled ISA (SPARC).");
680    switch (objFile->getOpSys()) {
681      case ObjectFile::Linux:
682        if (objFile->getArch() == ObjectFile::SPARC64) {
683            process = new Sparc64LinuxProcess(params, objFile);
684        } else {
685            process = new Sparc32LinuxProcess(params, objFile);
686        }
687        break;
688
689
690      case ObjectFile::Solaris:
691        process = new SparcSolarisProcess(params, objFile);
692        break;
693      default:
694        fatal("Unknown/unsupported operating system.");
695    }
696#elif THE_ISA == X86_ISA
697    if (objFile->getArch() != ObjectFile::X86)
698        fatal("Object file architecture does not match compiled ISA (x86).");
699    switch (objFile->getOpSys()) {
700      case ObjectFile::Linux:
701        process = new X86LinuxProcess(params, objFile);
702        break;
703      default:
704        fatal("Unknown/unsupported operating system.");
705    }
706#elif THE_ISA == MIPS_ISA
707    if (objFile->getArch() != ObjectFile::Mips)
708        fatal("Object file architecture does not match compiled ISA (MIPS).");
709    switch (objFile->getOpSys()) {
710      case ObjectFile::Linux:
711        process = new MipsLinuxProcess(params, objFile);
712        break;
713
714      default:
715        fatal("Unknown/unsupported operating system.");
716    }
717#elif THE_ISA == ARM_ISA
718    if (objFile->getArch() != ObjectFile::Arm)
719        fatal("Object file architecture does not match compiled ISA (ARM).");
720    switch (objFile->getOpSys()) {
721      case ObjectFile::Linux:
722        process = new ArmLinuxProcess(params, objFile);
723        break;
724
725      default:
726        fatal("Unknown/unsupported operating system.");
727    }
728#else
729#error "THE_ISA not set"
730#endif
731
732
733    if (process == NULL)
734        fatal("Unknown error creating process object.");
735    return process;
736}
737
738LiveProcess *
739LiveProcessParams::create()
740{
741    return LiveProcess::create(this);
742}
743