process.cc revision 10782 
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#elif THE_ISA == X86_ISA
81#include "arch/x86/linux/process.hh"
82#elif THE_ISA == POWER_ISA
83#include "arch/power/linux/process.hh"
84#else
85#error "THE_ISA not set"
86#endif
87
88
89using namespace std;
90using namespace TheISA;
91
92// current number of allocated processes
93int num_processes = 0;
94
95template<class IntType>
96AuxVector<IntType>::AuxVector(IntType type, IntType val)
97{
98    a_type = TheISA::htog(type);
99    a_val = TheISA::htog(val);
100}
101
102template struct AuxVector<uint32_t>;
103template struct AuxVector<uint64_t>;
104
105Process::Process(ProcessParams * params)
106    : SimObject(params), system(params->system),
107      brk_point(0), stack_base(0), stack_size(0), stack_min(0),
108      max_stack_size(params->max_stack_size),
109      next_thread_stack_base(0),
110      M5_pid(system->allocatePID()),
111      useArchPT(params->useArchPT),
112      kvmInSE(params->kvmInSE),
113      pTable(useArchPT ?
114        static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
115        static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
116      initVirtMem(system->getSystemPort(), this,
117                  SETranslatingPortProxy::Always)
118{
119    string in = params->input;
120    string out = params->output;
121    string err = params->errout;
122
123    // initialize file descriptors to default: same as simulator
124    int stdin_fd, stdout_fd, stderr_fd;
125
126    if (in == "stdin" || in == "cin")
127        stdin_fd = STDIN_FILENO;
128    else if (in == "None")
129        stdin_fd = -1;
130    else
131        stdin_fd = Process::openInputFile(in);
132
133    if (out == "stdout" || out == "cout")
134        stdout_fd = STDOUT_FILENO;
135    else if (out == "stderr" || out == "cerr")
136        stdout_fd = STDERR_FILENO;
137    else if (out == "None")
138        stdout_fd = -1;
139    else
140        stdout_fd = Process::openOutputFile(out);
141
142    if (err == "stdout" || err == "cout")
143        stderr_fd = STDOUT_FILENO;
144    else if (err == "stderr" || err == "cerr")
145        stderr_fd = STDERR_FILENO;
146    else if (err == "None")
147        stderr_fd = -1;
148    else if (err == out)
149        stderr_fd = stdout_fd;
150    else
151        stderr_fd = Process::openOutputFile(err);
152
153    // initialize first 3 fds (stdin, stdout, stderr)
154    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
155    fdo->fd = stdin_fd;
156    fdo->filename = in;
157    fdo->flags = O_RDONLY;
158    fdo->mode = -1;
159    fdo->fileOffset = 0;
160
161    fdo =  &fd_map[STDOUT_FILENO];
162    fdo->fd = stdout_fd;
163    fdo->filename = out;
164    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
165    fdo->mode = 0774;
166    fdo->fileOffset = 0;
167
168    fdo = &fd_map[STDERR_FILENO];
169    fdo->fd = stderr_fd;
170    fdo->filename = err;
171    fdo->flags = O_WRONLY;
172    fdo->mode = -1;
173    fdo->fileOffset = 0;
174
175
176    // mark remaining fds as free
177    for (int i = 3; i <= MAX_FD; ++i) {
178        fdo = &fd_map[i];
179        fdo->fd = -1;
180    }
181
182    mmap_start = mmap_end = 0;
183    nxm_start = nxm_end = 0;
184    // other parameters will be initialized when the program is loaded
185}
186
187
188void
189Process::regStats()
190{
191    using namespace Stats;
192
193    num_syscalls
194        .name(name() + ".num_syscalls")
195        .desc("Number of system calls")
196        ;
197}
198
199//
200// static helper functions
201//
202int
203Process::openInputFile(const string &filename)
204{
205    int fd = open(filename.c_str(), O_RDONLY);
206
207    if (fd == -1) {
208        perror(NULL);
209        cerr << "unable to open \"" << filename << "\" for reading\n";
210        fatal("can't open input file");
211    }
212
213    return fd;
214}
215
216
217int
218Process::openOutputFile(const string &filename)
219{
220    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
221
222    if (fd == -1) {
223        perror(NULL);
224        cerr << "unable to open \"" << filename << "\" for writing\n";
225        fatal("can't open output file");
226    }
227
228    return fd;
229}
230
231ThreadContext *
232Process::findFreeContext()
233{
234    int size = contextIds.size();
235    ThreadContext *tc;
236    for (int i = 0; i < size; ++i) {
237        tc = system->getThreadContext(contextIds[i]);
238        if (tc->status() == ThreadContext::Halted) {
239            // inactive context, free to use
240            return tc;
241        }
242    }
243    return NULL;
244}
245
246void
247Process::initState()
248{
249    if (contextIds.empty())
250        fatal("Process %s is not associated with any HW contexts!\n", name());
251
252    // first thread context for this process... initialize & enable
253    ThreadContext *tc = system->getThreadContext(contextIds[0]);
254
255    // mark this context as active so it will start ticking.
256    tc->activate();
257
258    pTable->initState(tc);
259}
260
261// map simulator fd sim_fd to target fd tgt_fd
262void
263Process::dup_fd(int sim_fd, int tgt_fd)
264{
265    if (tgt_fd < 0 || tgt_fd > MAX_FD)
266        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
267
268    Process::FdMap *fdo = &fd_map[tgt_fd];
269    fdo->fd = sim_fd;
270}
271
272
273// generate new target fd for sim_fd
274int
275Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
276                  bool pipe)
277{
278    // in case open() returns an error, don't allocate a new fd
279    if (sim_fd == -1)
280        return -1;
281
282    // find first free target fd
283    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
284        Process::FdMap *fdo = &fd_map[free_fd];
285        if (fdo->fd == -1 && fdo->driver == NULL) {
286            fdo->fd = sim_fd;
287            fdo->filename = filename;
288            fdo->mode = mode;
289            fdo->fileOffset = 0;
290            fdo->flags = flags;
291            fdo->isPipe = pipe;
292            fdo->readPipeSource = 0;
293            return free_fd;
294        }
295    }
296
297    panic("Process::alloc_fd: out of file descriptors!");
298}
299
300
301// free target fd (e.g., after close)
302void
303Process::free_fd(int tgt_fd)
304{
305    Process::FdMap *fdo = &fd_map[tgt_fd];
306    if (fdo->fd == -1)
307        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
308
309    fdo->fd = -1;
310    fdo->filename = "NULL";
311    fdo->mode = 0;
312    fdo->fileOffset = 0;
313    fdo->flags = 0;
314    fdo->isPipe = false;
315    fdo->readPipeSource = 0;
316    fdo->driver = NULL;
317}
318
319
320// look up simulator fd for given target fd
321int
322Process::sim_fd(int tgt_fd)
323{
324    if (tgt_fd < 0 || tgt_fd > MAX_FD)
325        return -1;
326
327    return fd_map[tgt_fd].fd;
328}
329
330Process::FdMap *
331Process::sim_fd_obj(int tgt_fd)
332{
333    if (tgt_fd < 0 || tgt_fd > MAX_FD)
334        return NULL;
335
336    return &fd_map[tgt_fd];
337}
338
339void
340Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
341{
342    int npages = divCeil(size, (int64_t)PageBytes);
343    Addr paddr = system->allocPhysPages(npages);
344    pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
345}
346
347bool
348Process::fixupStackFault(Addr vaddr)
349{
350    // Check if this is already on the stack and there's just no page there
351    // yet.
352    if (vaddr >= stack_min && vaddr < stack_base) {
353        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
354        return true;
355    }
356
357    // We've accessed the next page of the stack, so extend it to include
358    // this address.
359    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
360        while (vaddr < stack_min) {
361            stack_min -= TheISA::PageBytes;
362            if (stack_base - stack_min > max_stack_size)
363                fatal("Maximum stack size exceeded\n");
364            allocateMem(stack_min, TheISA::PageBytes);
365            inform("Increasing stack size by one page.");
366        };
367        return true;
368    }
369    return false;
370}
371
372// find all offsets for currently open files and save them
373void
374Process::fix_file_offsets()
375{
376    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
377    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
378    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
379    string in = fdo_stdin->filename;
380    string out = fdo_stdout->filename;
381    string err = fdo_stderr->filename;
382
383    // initialize file descriptors to default: same as simulator
384    int stdin_fd, stdout_fd, stderr_fd;
385
386    if (in == "stdin" || in == "cin")
387        stdin_fd = STDIN_FILENO;
388    else if (in == "NULL")
389        stdin_fd = -1;
390    else {
391        // open standard in and seek to the right location
392        stdin_fd = Process::openInputFile(in);
393        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
394            panic("Unable to seek to correct location in file: %s", in);
395    }
396
397    if (out == "stdout" || out == "cout")
398        stdout_fd = STDOUT_FILENO;
399    else if (out == "stderr" || out == "cerr")
400        stdout_fd = STDERR_FILENO;
401    else if (out == "NULL")
402        stdout_fd = -1;
403    else {
404        stdout_fd = Process::openOutputFile(out);
405        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
406            panic("Unable to seek to correct location in file: %s", out);
407    }
408
409    if (err == "stdout" || err == "cout")
410        stderr_fd = STDOUT_FILENO;
411    else if (err == "stderr" || err == "cerr")
412        stderr_fd = STDERR_FILENO;
413    else if (err == "NULL")
414        stderr_fd = -1;
415    else if (err == out)
416        stderr_fd = stdout_fd;
417    else {
418        stderr_fd = Process::openOutputFile(err);
419        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
420            panic("Unable to seek to correct location in file: %s", err);
421    }
422
423    fdo_stdin->fd = stdin_fd;
424    fdo_stdout->fd = stdout_fd;
425    fdo_stderr->fd = stderr_fd;
426
427
428    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
429        Process::FdMap *fdo = &fd_map[free_fd];
430        if (fdo->fd != -1) {
431            if (fdo->isPipe){
432                if (fdo->filename == "PIPE-WRITE")
433                    continue;
434                else {
435                    assert (fdo->filename == "PIPE-READ");
436                    //create a new pipe
437                    int fds[2];
438                    int pipe_retval = pipe(fds);
439
440                    if (pipe_retval < 0) {
441                        // error
442                        panic("Unable to create new pipe.");
443                    }
444                    fdo->fd = fds[0]; //set read pipe
445                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
446                    if (fdo_write->filename != "PIPE-WRITE")
447                        panic ("Couldn't find write end of the pipe");
448
449                    fdo_write->fd = fds[1];//set write pipe
450               }
451            } else {
452                //Open file
453                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
454
455                if (fd == -1)
456                    panic("Unable to open file: %s", fdo->filename);
457                fdo->fd = fd;
458
459                //Seek to correct location before checkpoint
460                if (lseek(fd, fdo->fileOffset, SEEK_SET) < 0)
461                    panic("Unable to seek to correct location in file: %s",
462                          fdo->filename);
463            }
464        }
465    }
466}
467
468void
469Process::find_file_offsets()
470{
471    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
472        Process::FdMap *fdo = &fd_map[free_fd];
473        if (fdo->fd != -1) {
474            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
475        } else {
476            fdo->filename = "NULL";
477            fdo->fileOffset = 0;
478        }
479    }
480}
481
482void
483Process::setReadPipeSource(int read_pipe_fd, int source_fd)
484{
485    Process::FdMap *fdo = &fd_map[read_pipe_fd];
486    fdo->readPipeSource = source_fd;
487}
488
489void
490Process::FdMap::serialize(std::ostream &os)
491{
492    SERIALIZE_SCALAR(fd);
493    SERIALIZE_SCALAR(isPipe);
494    SERIALIZE_SCALAR(filename);
495    SERIALIZE_SCALAR(flags);
496    SERIALIZE_SCALAR(readPipeSource);
497    SERIALIZE_SCALAR(fileOffset);
498}
499
500void
501Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
502{
503    UNSERIALIZE_SCALAR(fd);
504    UNSERIALIZE_SCALAR(isPipe);
505    UNSERIALIZE_SCALAR(filename);
506    UNSERIALIZE_SCALAR(flags);
507    UNSERIALIZE_SCALAR(readPipeSource);
508    UNSERIALIZE_SCALAR(fileOffset);
509}
510
511void
512Process::serialize(std::ostream &os)
513{
514    SERIALIZE_SCALAR(brk_point);
515    SERIALIZE_SCALAR(stack_base);
516    SERIALIZE_SCALAR(stack_size);
517    SERIALIZE_SCALAR(stack_min);
518    SERIALIZE_SCALAR(next_thread_stack_base);
519    SERIALIZE_SCALAR(mmap_start);
520    SERIALIZE_SCALAR(mmap_end);
521    SERIALIZE_SCALAR(nxm_start);
522    SERIALIZE_SCALAR(nxm_end);
523    find_file_offsets();
524    pTable->serialize(os);
525    for (int x = 0; x <= MAX_FD; x++) {
526        nameOut(os, csprintf("%s.FdMap%d", name(), x));
527        fd_map[x].serialize(os);
528    }
529    SERIALIZE_SCALAR(M5_pid);
530
531}
532
533void
534Process::unserialize(Checkpoint *cp, const std::string &section)
535{
536    UNSERIALIZE_SCALAR(brk_point);
537    UNSERIALIZE_SCALAR(stack_base);
538    UNSERIALIZE_SCALAR(stack_size);
539    UNSERIALIZE_SCALAR(stack_min);
540    UNSERIALIZE_SCALAR(next_thread_stack_base);
541    UNSERIALIZE_SCALAR(mmap_start);
542    UNSERIALIZE_SCALAR(mmap_end);
543    UNSERIALIZE_SCALAR(nxm_start);
544    UNSERIALIZE_SCALAR(nxm_end);
545    pTable->unserialize(cp, section);
546    for (int x = 0; x <= MAX_FD; x++) {
547        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
548    }
549    fix_file_offsets();
550    UNSERIALIZE_OPT_SCALAR(M5_pid);
551    // The above returns a bool so that you could do something if you don't
552    // find the param in the checkpoint if you wanted to, like set a default
553    // but in this case we'll just stick with the instantianted value if not
554    // found.
555}
556
557
558bool
559Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
560{
561    pTable->map(vaddr, paddr, size,
562                cacheable ? 0 : PageTableBase::Uncacheable);
563    return true;
564}
565
566
567////////////////////////////////////////////////////////////////////////
568//
569// LiveProcess member definitions
570//
571////////////////////////////////////////////////////////////////////////
572
573
574LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
575    : Process(params), objFile(_objFile),
576      argv(params->cmd), envp(params->env), cwd(params->cwd),
577      __uid(params->uid), __euid(params->euid),
578      __gid(params->gid), __egid(params->egid),
579      __pid(params->pid), __ppid(params->ppid),
580      drivers(params->drivers)
581{
582
583    // load up symbols, if any... these may be used for debugging or
584    // profiling.
585    if (!debugSymbolTable) {
586        debugSymbolTable = new SymbolTable();
587        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
588            !objFile->loadLocalSymbols(debugSymbolTable) ||
589            !objFile->loadWeakSymbols(debugSymbolTable)) {
590            // didn't load any symbols
591            delete debugSymbolTable;
592            debugSymbolTable = NULL;
593        }
594    }
595}
596
597void
598LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
599{
600    num_syscalls++;
601
602    SyscallDesc *desc = getDesc(callnum);
603    if (desc == NULL)
604        fatal("Syscall %d out of range", callnum);
605
606    desc->doSyscall(callnum, this, tc);
607}
608
609IntReg
610LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
611{
612    return getSyscallArg(tc, i);
613}
614
615
616EmulatedDriver *
617LiveProcess::findDriver(std::string filename)
618{
619    for (EmulatedDriver *d : drivers) {
620        if (d->match(filename))
621            return d;
622    }
623
624    return NULL;
625}
626
627
628LiveProcess *
629LiveProcess::create(LiveProcessParams * params)
630{
631    LiveProcess *process = NULL;
632
633    string executable =
634        params->executable == "" ? params->cmd[0] : params->executable;
635    ObjectFile *objFile = createObjectFile(executable);
636    if (objFile == NULL) {
637        fatal("Can't load object file %s", executable);
638    }
639
640    if (objFile->isDynamic())
641       fatal("Object file is a dynamic executable however only static "
642             "executables are supported!\n       Please recompile your "
643             "executable as a static binary and try again.\n");
644
645#if THE_ISA == ALPHA_ISA
646    if (objFile->getArch() != ObjectFile::Alpha)
647        fatal("Object file architecture does not match compiled ISA (Alpha).");
648
649    switch (objFile->getOpSys()) {
650      case ObjectFile::Tru64:
651        process = new AlphaTru64Process(params, objFile);
652        break;
653
654      case ObjectFile::UnknownOpSys:
655        warn("Unknown operating system; assuming Linux.");
656        // fall through
657      case ObjectFile::Linux:
658        process = new AlphaLinuxProcess(params, objFile);
659        break;
660
661      default:
662        fatal("Unknown/unsupported operating system.");
663    }
664#elif THE_ISA == SPARC_ISA
665    if (objFile->getArch() != ObjectFile::SPARC64 &&
666        objFile->getArch() != ObjectFile::SPARC32)
667        fatal("Object file architecture does not match compiled ISA (SPARC).");
668    switch (objFile->getOpSys()) {
669      case ObjectFile::UnknownOpSys:
670        warn("Unknown operating system; assuming Linux.");
671        // fall through
672      case ObjectFile::Linux:
673        if (objFile->getArch() == ObjectFile::SPARC64) {
674            process = new Sparc64LinuxProcess(params, objFile);
675        } else {
676            process = new Sparc32LinuxProcess(params, objFile);
677        }
678        break;
679
680
681      case ObjectFile::Solaris:
682        process = new SparcSolarisProcess(params, objFile);
683        break;
684
685      default:
686        fatal("Unknown/unsupported operating system.");
687    }
688#elif THE_ISA == X86_ISA
689    if (objFile->getArch() != ObjectFile::X86_64 &&
690        objFile->getArch() != ObjectFile::I386)
691        fatal("Object file architecture does not match compiled ISA (x86).");
692    switch (objFile->getOpSys()) {
693      case ObjectFile::UnknownOpSys:
694        warn("Unknown operating system; assuming Linux.");
695        // fall through
696      case ObjectFile::Linux:
697        if (objFile->getArch() == ObjectFile::X86_64) {
698            process = new X86_64LinuxProcess(params, objFile);
699        } else {
700            process = new I386LinuxProcess(params, objFile);
701        }
702        break;
703
704      default:
705        fatal("Unknown/unsupported operating system.");
706    }
707#elif THE_ISA == MIPS_ISA
708    if (objFile->getArch() != ObjectFile::Mips)
709        fatal("Object file architecture does not match compiled ISA (MIPS).");
710    switch (objFile->getOpSys()) {
711      case ObjectFile::UnknownOpSys:
712        warn("Unknown operating system; assuming Linux.");
713        // fall through
714      case ObjectFile::Linux:
715        process = new MipsLinuxProcess(params, objFile);
716        break;
717
718      default:
719        fatal("Unknown/unsupported operating system.");
720    }
721#elif THE_ISA == ARM_ISA
722    ObjectFile::Arch arch = objFile->getArch();
723    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
724        arch != ObjectFile::Arm64)
725        fatal("Object file architecture does not match compiled ISA (ARM).");
726    switch (objFile->getOpSys()) {
727      case ObjectFile::UnknownOpSys:
728        warn("Unknown operating system; assuming Linux.");
729        // fall through
730      case ObjectFile::Linux:
731        if (arch == ObjectFile::Arm64) {
732            process = new ArmLinuxProcess64(params, objFile,
733                                            objFile->getArch());
734        } else {
735            process = new ArmLinuxProcess32(params, objFile,
736                                            objFile->getArch());
737        }
738        break;
739      case ObjectFile::LinuxArmOABI:
740        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
741              " EABI compiler.");
742      default:
743        fatal("Unknown/unsupported operating system.");
744    }
745#elif THE_ISA == POWER_ISA
746    if (objFile->getArch() != ObjectFile::Power)
747        fatal("Object file architecture does not match compiled ISA (Power).");
748    switch (objFile->getOpSys()) {
749      case ObjectFile::UnknownOpSys:
750        warn("Unknown operating system; assuming Linux.");
751        // fall through
752      case ObjectFile::Linux:
753        process = new PowerLinuxProcess(params, objFile);
754        break;
755
756      default:
757        fatal("Unknown/unsupported operating system.");
758    }
759#else
760#error "THE_ISA not set"
761#endif
762
763    if (process == NULL)
764        fatal("Unknown error creating process object.");
765    return process;
766}
767
768LiveProcess *
769LiveProcessParams::create()
770{
771    return LiveProcess::create(this);
772}
773