process.cc revision 10913:38dbdeea7f1f 
1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
3 * Copyright (c) 2012 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder.  You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Copyright (c) 2001-2005 The Regents of The University of Michigan
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;
22 * redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution;
25 * neither the name of the copyright holders nor the names of its
26 * contributors may be used to endorse or promote products derived from
27 * this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Nathan Binkert
42 *          Steve Reinhardt
43 *          Ali Saidi
44 */
45
46#include <fcntl.h>
47#include <unistd.h>
48
49#include <cstdio>
50#include <string>
51
52#include "base/loader/object_file.hh"
53#include "base/loader/symtab.hh"
54#include "base/intmath.hh"
55#include "base/statistics.hh"
56#include "config/the_isa.hh"
57#include "cpu/thread_context.hh"
58#include "mem/page_table.hh"
59#include "mem/multi_level_page_table.hh"
60#include "mem/se_translating_port_proxy.hh"
61#include "params/LiveProcess.hh"
62#include "params/Process.hh"
63#include "sim/debug.hh"
64#include "sim/process.hh"
65#include "sim/process_impl.hh"
66#include "sim/stats.hh"
67#include "sim/syscall_emul.hh"
68#include "sim/system.hh"
69
70#if THE_ISA == ALPHA_ISA
71#include "arch/alpha/linux/process.hh"
72#include "arch/alpha/tru64/process.hh"
73#elif THE_ISA == SPARC_ISA
74#include "arch/sparc/linux/process.hh"
75#include "arch/sparc/solaris/process.hh"
76#elif THE_ISA == MIPS_ISA
77#include "arch/mips/linux/process.hh"
78#elif THE_ISA == ARM_ISA
79#include "arch/arm/linux/process.hh"
80#include "arch/arm/freebsd/process.hh"
81#elif THE_ISA == X86_ISA
82#include "arch/x86/linux/process.hh"
83#elif THE_ISA == POWER_ISA
84#include "arch/power/linux/process.hh"
85#else
86#error "THE_ISA not set"
87#endif
88
89
90using namespace std;
91using namespace TheISA;
92
93// current number of allocated processes
94int num_processes = 0;
95
96template<class IntType>
97AuxVector<IntType>::AuxVector(IntType type, IntType val)
98{
99    a_type = TheISA::htog(type);
100    a_val = TheISA::htog(val);
101}
102
103template struct AuxVector<uint32_t>;
104template struct AuxVector<uint64_t>;
105
106Process::Process(ProcessParams * params)
107    : SimObject(params), system(params->system),
108      brk_point(0), stack_base(0), stack_size(0), stack_min(0),
109      max_stack_size(params->max_stack_size),
110      next_thread_stack_base(0),
111      M5_pid(system->allocatePID()),
112      useArchPT(params->useArchPT),
113      kvmInSE(params->kvmInSE),
114      pTable(useArchPT ?
115        static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
116        static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
117      initVirtMem(system->getSystemPort(), this,
118                  SETranslatingPortProxy::Always)
119{
120    string in = params->input;
121    string out = params->output;
122    string err = params->errout;
123
124    // initialize file descriptors to default: same as simulator
125    int stdin_fd, stdout_fd, stderr_fd;
126
127    if (in == "stdin" || in == "cin")
128        stdin_fd = STDIN_FILENO;
129    else if (in == "None")
130        stdin_fd = -1;
131    else
132        stdin_fd = Process::openInputFile(in);
133
134    if (out == "stdout" || out == "cout")
135        stdout_fd = STDOUT_FILENO;
136    else if (out == "stderr" || out == "cerr")
137        stdout_fd = STDERR_FILENO;
138    else if (out == "None")
139        stdout_fd = -1;
140    else
141        stdout_fd = Process::openOutputFile(out);
142
143    if (err == "stdout" || err == "cout")
144        stderr_fd = STDOUT_FILENO;
145    else if (err == "stderr" || err == "cerr")
146        stderr_fd = STDERR_FILENO;
147    else if (err == "None")
148        stderr_fd = -1;
149    else if (err == out)
150        stderr_fd = stdout_fd;
151    else
152        stderr_fd = Process::openOutputFile(err);
153
154    // initialize first 3 fds (stdin, stdout, stderr)
155    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
156    fdo->fd = stdin_fd;
157    fdo->filename = in;
158    fdo->flags = O_RDONLY;
159    fdo->mode = -1;
160    fdo->fileOffset = 0;
161
162    fdo =  &fd_map[STDOUT_FILENO];
163    fdo->fd = stdout_fd;
164    fdo->filename = out;
165    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
166    fdo->mode = 0774;
167    fdo->fileOffset = 0;
168
169    fdo = &fd_map[STDERR_FILENO];
170    fdo->fd = stderr_fd;
171    fdo->filename = err;
172    fdo->flags = O_WRONLY;
173    fdo->mode = -1;
174    fdo->fileOffset = 0;
175
176
177    // mark remaining fds as free
178    for (int i = 3; i <= MAX_FD; ++i) {
179        fdo = &fd_map[i];
180        fdo->fd = -1;
181    }
182
183    mmap_start = mmap_end = 0;
184    nxm_start = nxm_end = 0;
185    // other parameters will be initialized when the program is loaded
186}
187
188
189void
190Process::regStats()
191{
192    using namespace Stats;
193
194    num_syscalls
195        .name(name() + ".num_syscalls")
196        .desc("Number of system calls")
197        ;
198}
199
200//
201// static helper functions
202//
203int
204Process::openInputFile(const string &filename)
205{
206    int fd = open(filename.c_str(), O_RDONLY);
207
208    if (fd == -1) {
209        perror(NULL);
210        cerr << "unable to open \"" << filename << "\" for reading\n";
211        fatal("can't open input file");
212    }
213
214    return fd;
215}
216
217
218int
219Process::openOutputFile(const string &filename)
220{
221    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
222
223    if (fd == -1) {
224        perror(NULL);
225        cerr << "unable to open \"" << filename << "\" for writing\n";
226        fatal("can't open output file");
227    }
228
229    return fd;
230}
231
232ThreadContext *
233Process::findFreeContext()
234{
235    int size = contextIds.size();
236    ThreadContext *tc;
237    for (int i = 0; i < size; ++i) {
238        tc = system->getThreadContext(contextIds[i]);
239        if (tc->status() == ThreadContext::Halted) {
240            // inactive context, free to use
241            return tc;
242        }
243    }
244    return NULL;
245}
246
247void
248Process::initState()
249{
250    if (contextIds.empty())
251        fatal("Process %s is not associated with any HW contexts!\n", name());
252
253    // first thread context for this process... initialize & enable
254    ThreadContext *tc = system->getThreadContext(contextIds[0]);
255
256    // mark this context as active so it will start ticking.
257    tc->activate();
258
259    pTable->initState(tc);
260}
261
262DrainState
263Process::drain()
264{
265    find_file_offsets();
266    return DrainState::Drained;
267}
268
269// map simulator fd sim_fd to target fd tgt_fd
270void
271Process::dup_fd(int sim_fd, int tgt_fd)
272{
273    if (tgt_fd < 0 || tgt_fd > MAX_FD)
274        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
275
276    Process::FdMap *fdo = &fd_map[tgt_fd];
277    fdo->fd = sim_fd;
278}
279
280
281// generate new target fd for sim_fd
282int
283Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
284                  bool pipe)
285{
286    // in case open() returns an error, don't allocate a new fd
287    if (sim_fd == -1)
288        return -1;
289
290    // find first free target fd
291    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
292        Process::FdMap *fdo = &fd_map[free_fd];
293        if (fdo->fd == -1 && fdo->driver == NULL) {
294            fdo->fd = sim_fd;
295            fdo->filename = filename;
296            fdo->mode = mode;
297            fdo->fileOffset = 0;
298            fdo->flags = flags;
299            fdo->isPipe = pipe;
300            fdo->readPipeSource = 0;
301            return free_fd;
302        }
303    }
304
305    panic("Process::alloc_fd: out of file descriptors!");
306}
307
308
309// free target fd (e.g., after close)
310void
311Process::free_fd(int tgt_fd)
312{
313    Process::FdMap *fdo = &fd_map[tgt_fd];
314    if (fdo->fd == -1)
315        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
316
317    fdo->fd = -1;
318    fdo->filename = "NULL";
319    fdo->mode = 0;
320    fdo->fileOffset = 0;
321    fdo->flags = 0;
322    fdo->isPipe = false;
323    fdo->readPipeSource = 0;
324    fdo->driver = NULL;
325}
326
327
328// look up simulator fd for given target fd
329int
330Process::sim_fd(int tgt_fd)
331{
332    if (tgt_fd < 0 || tgt_fd > MAX_FD)
333        return -1;
334
335    return fd_map[tgt_fd].fd;
336}
337
338Process::FdMap *
339Process::sim_fd_obj(int tgt_fd)
340{
341    if (tgt_fd < 0 || tgt_fd > MAX_FD)
342        return NULL;
343
344    return &fd_map[tgt_fd];
345}
346
347void
348Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
349{
350    int npages = divCeil(size, (int64_t)PageBytes);
351    Addr paddr = system->allocPhysPages(npages);
352    pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
353}
354
355bool
356Process::fixupStackFault(Addr vaddr)
357{
358    // Check if this is already on the stack and there's just no page there
359    // yet.
360    if (vaddr >= stack_min && vaddr < stack_base) {
361        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
362        return true;
363    }
364
365    // We've accessed the next page of the stack, so extend it to include
366    // this address.
367    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
368        while (vaddr < stack_min) {
369            stack_min -= TheISA::PageBytes;
370            if (stack_base - stack_min > max_stack_size)
371                fatal("Maximum stack size exceeded\n");
372            allocateMem(stack_min, TheISA::PageBytes);
373            inform("Increasing stack size by one page.");
374        };
375        return true;
376    }
377    return false;
378}
379
380// find all offsets for currently open files and save them
381void
382Process::fix_file_offsets()
383{
384    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
385    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
386    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
387    string in = fdo_stdin->filename;
388    string out = fdo_stdout->filename;
389    string err = fdo_stderr->filename;
390
391    // initialize file descriptors to default: same as simulator
392    int stdin_fd, stdout_fd, stderr_fd;
393
394    if (in == "stdin" || in == "cin")
395        stdin_fd = STDIN_FILENO;
396    else if (in == "NULL")
397        stdin_fd = -1;
398    else {
399        // open standard in and seek to the right location
400        stdin_fd = Process::openInputFile(in);
401        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
402            panic("Unable to seek to correct location in file: %s", in);
403    }
404
405    if (out == "stdout" || out == "cout")
406        stdout_fd = STDOUT_FILENO;
407    else if (out == "stderr" || out == "cerr")
408        stdout_fd = STDERR_FILENO;
409    else if (out == "NULL")
410        stdout_fd = -1;
411    else {
412        stdout_fd = Process::openOutputFile(out);
413        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
414            panic("Unable to seek to correct location in file: %s", out);
415    }
416
417    if (err == "stdout" || err == "cout")
418        stderr_fd = STDOUT_FILENO;
419    else if (err == "stderr" || err == "cerr")
420        stderr_fd = STDERR_FILENO;
421    else if (err == "NULL")
422        stderr_fd = -1;
423    else if (err == out)
424        stderr_fd = stdout_fd;
425    else {
426        stderr_fd = Process::openOutputFile(err);
427        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
428            panic("Unable to seek to correct location in file: %s", err);
429    }
430
431    fdo_stdin->fd = stdin_fd;
432    fdo_stdout->fd = stdout_fd;
433    fdo_stderr->fd = stderr_fd;
434
435
436    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
437        Process::FdMap *fdo = &fd_map[free_fd];
438        if (fdo->fd != -1) {
439            if (fdo->isPipe){
440                if (fdo->filename == "PIPE-WRITE")
441                    continue;
442                else {
443                    assert (fdo->filename == "PIPE-READ");
444                    //create a new pipe
445                    int fds[2];
446                    int pipe_retval = pipe(fds);
447
448                    if (pipe_retval < 0) {
449                        // error
450                        panic("Unable to create new pipe.");
451                    }
452                    fdo->fd = fds[0]; //set read pipe
453                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
454                    if (fdo_write->filename != "PIPE-WRITE")
455                        panic ("Couldn't find write end of the pipe");
456
457                    fdo_write->fd = fds[1];//set write pipe
458               }
459            } else {
460                //Open file
461                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
462
463                if (fd == -1)
464                    panic("Unable to open file: %s", fdo->filename);
465                fdo->fd = fd;
466
467                //Seek to correct location before checkpoint
468                if (lseek(fd, fdo->fileOffset, SEEK_SET) < 0)
469                    panic("Unable to seek to correct location in file: %s",
470                          fdo->filename);
471            }
472        }
473    }
474}
475
476void
477Process::find_file_offsets()
478{
479    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
480        Process::FdMap *fdo = &fd_map[free_fd];
481        if (fdo->fd != -1) {
482            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
483        } else {
484            fdo->filename = "NULL";
485            fdo->fileOffset = 0;
486        }
487    }
488}
489
490void
491Process::setReadPipeSource(int read_pipe_fd, int source_fd)
492{
493    Process::FdMap *fdo = &fd_map[read_pipe_fd];
494    fdo->readPipeSource = source_fd;
495}
496
497void
498Process::FdMap::serialize(CheckpointOut &cp) const
499{
500    SERIALIZE_SCALAR(fd);
501    SERIALIZE_SCALAR(isPipe);
502    SERIALIZE_SCALAR(filename);
503    SERIALIZE_SCALAR(flags);
504    SERIALIZE_SCALAR(readPipeSource);
505    SERIALIZE_SCALAR(fileOffset);
506}
507
508void
509Process::FdMap::unserialize(CheckpointIn &cp)
510{
511    UNSERIALIZE_SCALAR(fd);
512    UNSERIALIZE_SCALAR(isPipe);
513    UNSERIALIZE_SCALAR(filename);
514    UNSERIALIZE_SCALAR(flags);
515    UNSERIALIZE_SCALAR(readPipeSource);
516    UNSERIALIZE_SCALAR(fileOffset);
517}
518
519void
520Process::serialize(CheckpointOut &cp) const
521{
522    SERIALIZE_SCALAR(brk_point);
523    SERIALIZE_SCALAR(stack_base);
524    SERIALIZE_SCALAR(stack_size);
525    SERIALIZE_SCALAR(stack_min);
526    SERIALIZE_SCALAR(next_thread_stack_base);
527    SERIALIZE_SCALAR(mmap_start);
528    SERIALIZE_SCALAR(mmap_end);
529    SERIALIZE_SCALAR(nxm_start);
530    SERIALIZE_SCALAR(nxm_end);
531    pTable->serialize(cp);
532    for (int x = 0; x <= MAX_FD; x++) {
533        fd_map[x].serializeSection(cp, csprintf("FdMap%d", x));
534    }
535    SERIALIZE_SCALAR(M5_pid);
536
537}
538
539void
540Process::unserialize(CheckpointIn &cp)
541{
542    UNSERIALIZE_SCALAR(brk_point);
543    UNSERIALIZE_SCALAR(stack_base);
544    UNSERIALIZE_SCALAR(stack_size);
545    UNSERIALIZE_SCALAR(stack_min);
546    UNSERIALIZE_SCALAR(next_thread_stack_base);
547    UNSERIALIZE_SCALAR(mmap_start);
548    UNSERIALIZE_SCALAR(mmap_end);
549    UNSERIALIZE_SCALAR(nxm_start);
550    UNSERIALIZE_SCALAR(nxm_end);
551    pTable->unserialize(cp);
552    for (int x = 0; x <= MAX_FD; x++) {
553        fd_map[x].unserializeSection(cp, csprintf("FdMap%d", x));
554    }
555    fix_file_offsets();
556    UNSERIALIZE_OPT_SCALAR(M5_pid);
557    // The above returns a bool so that you could do something if you don't
558    // find the param in the checkpoint if you wanted to, like set a default
559    // but in this case we'll just stick with the instantianted value if not
560    // found.
561}
562
563
564bool
565Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
566{
567    pTable->map(vaddr, paddr, size,
568                cacheable ? 0 : PageTableBase::Uncacheable);
569    return true;
570}
571
572
573////////////////////////////////////////////////////////////////////////
574//
575// LiveProcess member definitions
576//
577////////////////////////////////////////////////////////////////////////
578
579
580LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
581    : Process(params), objFile(_objFile),
582      argv(params->cmd), envp(params->env), cwd(params->cwd),
583      __uid(params->uid), __euid(params->euid),
584      __gid(params->gid), __egid(params->egid),
585      __pid(params->pid), __ppid(params->ppid),
586      drivers(params->drivers)
587{
588
589    // load up symbols, if any... these may be used for debugging or
590    // profiling.
591    if (!debugSymbolTable) {
592        debugSymbolTable = new SymbolTable();
593        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
594            !objFile->loadLocalSymbols(debugSymbolTable) ||
595            !objFile->loadWeakSymbols(debugSymbolTable)) {
596            // didn't load any symbols
597            delete debugSymbolTable;
598            debugSymbolTable = NULL;
599        }
600    }
601}
602
603void
604LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
605{
606    num_syscalls++;
607
608    SyscallDesc *desc = getDesc(callnum);
609    if (desc == NULL)
610        fatal("Syscall %d out of range", callnum);
611
612    desc->doSyscall(callnum, this, tc);
613}
614
615IntReg
616LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
617{
618    return getSyscallArg(tc, i);
619}
620
621
622EmulatedDriver *
623LiveProcess::findDriver(std::string filename)
624{
625    for (EmulatedDriver *d : drivers) {
626        if (d->match(filename))
627            return d;
628    }
629
630    return NULL;
631}
632
633
634LiveProcess *
635LiveProcess::create(LiveProcessParams * params)
636{
637    LiveProcess *process = NULL;
638
639    string executable =
640        params->executable == "" ? params->cmd[0] : params->executable;
641    ObjectFile *objFile = createObjectFile(executable);
642    if (objFile == NULL) {
643        fatal("Can't load object file %s", executable);
644    }
645
646    if (objFile->isDynamic())
647       fatal("Object file is a dynamic executable however only static "
648             "executables are supported!\n       Please recompile your "
649             "executable as a static binary and try again.\n");
650
651#if THE_ISA == ALPHA_ISA
652    if (objFile->getArch() != ObjectFile::Alpha)
653        fatal("Object file architecture does not match compiled ISA (Alpha).");
654
655    switch (objFile->getOpSys()) {
656      case ObjectFile::Tru64:
657        process = new AlphaTru64Process(params, objFile);
658        break;
659
660      case ObjectFile::UnknownOpSys:
661        warn("Unknown operating system; assuming Linux.");
662        // fall through
663      case ObjectFile::Linux:
664        process = new AlphaLinuxProcess(params, objFile);
665        break;
666
667      default:
668        fatal("Unknown/unsupported operating system.");
669    }
670#elif THE_ISA == SPARC_ISA
671    if (objFile->getArch() != ObjectFile::SPARC64 &&
672        objFile->getArch() != ObjectFile::SPARC32)
673        fatal("Object file architecture does not match compiled ISA (SPARC).");
674    switch (objFile->getOpSys()) {
675      case ObjectFile::UnknownOpSys:
676        warn("Unknown operating system; assuming Linux.");
677        // fall through
678      case ObjectFile::Linux:
679        if (objFile->getArch() == ObjectFile::SPARC64) {
680            process = new Sparc64LinuxProcess(params, objFile);
681        } else {
682            process = new Sparc32LinuxProcess(params, objFile);
683        }
684        break;
685
686
687      case ObjectFile::Solaris:
688        process = new SparcSolarisProcess(params, objFile);
689        break;
690
691      default:
692        fatal("Unknown/unsupported operating system.");
693    }
694#elif THE_ISA == X86_ISA
695    if (objFile->getArch() != ObjectFile::X86_64 &&
696        objFile->getArch() != ObjectFile::I386)
697        fatal("Object file architecture does not match compiled ISA (x86).");
698    switch (objFile->getOpSys()) {
699      case ObjectFile::UnknownOpSys:
700        warn("Unknown operating system; assuming Linux.");
701        // fall through
702      case ObjectFile::Linux:
703        if (objFile->getArch() == ObjectFile::X86_64) {
704            process = new X86_64LinuxProcess(params, objFile);
705        } else {
706            process = new I386LinuxProcess(params, objFile);
707        }
708        break;
709
710      default:
711        fatal("Unknown/unsupported operating system.");
712    }
713#elif THE_ISA == MIPS_ISA
714    if (objFile->getArch() != ObjectFile::Mips)
715        fatal("Object file architecture does not match compiled ISA (MIPS).");
716    switch (objFile->getOpSys()) {
717      case ObjectFile::UnknownOpSys:
718        warn("Unknown operating system; assuming Linux.");
719        // fall through
720      case ObjectFile::Linux:
721        process = new MipsLinuxProcess(params, objFile);
722        break;
723
724      default:
725        fatal("Unknown/unsupported operating system.");
726    }
727#elif THE_ISA == ARM_ISA
728    ObjectFile::Arch arch = objFile->getArch();
729    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
730        arch != ObjectFile::Arm64)
731        fatal("Object file architecture does not match compiled ISA (ARM).");
732    switch (objFile->getOpSys()) {
733      case ObjectFile::UnknownOpSys:
734        warn("Unknown operating system; assuming Linux.");
735        // fall through
736      case ObjectFile::Linux:
737        if (arch == ObjectFile::Arm64) {
738            process = new ArmLinuxProcess64(params, objFile,
739                                            objFile->getArch());
740        } else {
741            process = new ArmLinuxProcess32(params, objFile,
742                                            objFile->getArch());
743        }
744        break;
745      case ObjectFile::FreeBSD:
746        if (arch == ObjectFile::Arm64) {
747            process = new ArmFreebsdProcess64(params, objFile,
748                                              objFile->getArch());
749        } else {
750            process = new ArmFreebsdProcess32(params, objFile,
751                                              objFile->getArch());
752        }
753        break;
754      case ObjectFile::LinuxArmOABI:
755        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
756              " EABI compiler.");
757      default:
758        fatal("Unknown/unsupported operating system.");
759    }
760#elif THE_ISA == POWER_ISA
761    if (objFile->getArch() != ObjectFile::Power)
762        fatal("Object file architecture does not match compiled ISA (Power).");
763    switch (objFile->getOpSys()) {
764      case ObjectFile::UnknownOpSys:
765        warn("Unknown operating system; assuming Linux.");
766        // fall through
767      case ObjectFile::Linux:
768        process = new PowerLinuxProcess(params, objFile);
769        break;
770
771      default:
772        fatal("Unknown/unsupported operating system.");
773    }
774#else
775#error "THE_ISA not set"
776#endif
777
778    if (process == NULL)
779        fatal("Unknown error creating process object.");
780    return process;
781}
782
783LiveProcess *
784LiveProcessParams::create()
785{
786    return LiveProcess::create(this);
787}
788