process.cc revision 10558:426665ec11a9 
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      max_stack_size(params->max_stack_size),
108      M5_pid(system->allocatePID()),
109      useArchPT(params->useArchPT),
110      kvmInSE(params->kvmInSE),
111      pTable(useArchPT ?
112        static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
113        static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
114      initVirtMem(system->getSystemPort(), this,
115                  SETranslatingPortProxy::Always)
116{
117    string in = params->input;
118    string out = params->output;
119    string err = params->errout;
120
121    // initialize file descriptors to default: same as simulator
122    int stdin_fd, stdout_fd, stderr_fd;
123
124    if (in == "stdin" || in == "cin")
125        stdin_fd = STDIN_FILENO;
126    else if (in == "None")
127        stdin_fd = -1;
128    else
129        stdin_fd = Process::openInputFile(in);
130
131    if (out == "stdout" || out == "cout")
132        stdout_fd = STDOUT_FILENO;
133    else if (out == "stderr" || out == "cerr")
134        stdout_fd = STDERR_FILENO;
135    else if (out == "None")
136        stdout_fd = -1;
137    else
138        stdout_fd = Process::openOutputFile(out);
139
140    if (err == "stdout" || err == "cout")
141        stderr_fd = STDOUT_FILENO;
142    else if (err == "stderr" || err == "cerr")
143        stderr_fd = STDERR_FILENO;
144    else if (err == "None")
145        stderr_fd = -1;
146    else if (err == out)
147        stderr_fd = stdout_fd;
148    else
149        stderr_fd = Process::openOutputFile(err);
150
151    // initialize first 3 fds (stdin, stdout, stderr)
152    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
153    fdo->fd = stdin_fd;
154    fdo->filename = in;
155    fdo->flags = O_RDONLY;
156    fdo->mode = -1;
157    fdo->fileOffset = 0;
158
159    fdo =  &fd_map[STDOUT_FILENO];
160    fdo->fd = stdout_fd;
161    fdo->filename = out;
162    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
163    fdo->mode = 0774;
164    fdo->fileOffset = 0;
165
166    fdo = &fd_map[STDERR_FILENO];
167    fdo->fd = stderr_fd;
168    fdo->filename = err;
169    fdo->flags = O_WRONLY;
170    fdo->mode = -1;
171    fdo->fileOffset = 0;
172
173
174    // mark remaining fds as free
175    for (int i = 3; i <= MAX_FD; ++i) {
176        fdo = &fd_map[i];
177        fdo->fd = -1;
178    }
179
180    mmap_start = mmap_end = 0;
181    nxm_start = nxm_end = 0;
182    // other parameters will be initialized when the program is loaded
183}
184
185
186void
187Process::regStats()
188{
189    using namespace Stats;
190
191    num_syscalls
192        .name(name() + ".num_syscalls")
193        .desc("Number of system calls")
194        ;
195}
196
197//
198// static helper functions
199//
200int
201Process::openInputFile(const string &filename)
202{
203    int fd = open(filename.c_str(), O_RDONLY);
204
205    if (fd == -1) {
206        perror(NULL);
207        cerr << "unable to open \"" << filename << "\" for reading\n";
208        fatal("can't open input file");
209    }
210
211    return fd;
212}
213
214
215int
216Process::openOutputFile(const string &filename)
217{
218    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
219
220    if (fd == -1) {
221        perror(NULL);
222        cerr << "unable to open \"" << filename << "\" for writing\n";
223        fatal("can't open output file");
224    }
225
226    return fd;
227}
228
229ThreadContext *
230Process::findFreeContext()
231{
232    int size = contextIds.size();
233    ThreadContext *tc;
234    for (int i = 0; i < size; ++i) {
235        tc = system->getThreadContext(contextIds[i]);
236        if (tc->status() == ThreadContext::Halted) {
237            // inactive context, free to use
238            return tc;
239        }
240    }
241    return NULL;
242}
243
244void
245Process::initState()
246{
247    if (contextIds.empty())
248        fatal("Process %s is not associated with any HW contexts!\n", name());
249
250    // first thread context for this process... initialize & enable
251    ThreadContext *tc = system->getThreadContext(contextIds[0]);
252
253    // mark this context as active so it will start ticking.
254    tc->activate();
255
256    pTable->initState(tc);
257}
258
259// map simulator fd sim_fd to target fd tgt_fd
260void
261Process::dup_fd(int sim_fd, int tgt_fd)
262{
263    if (tgt_fd < 0 || tgt_fd > MAX_FD)
264        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
265
266    Process::FdMap *fdo = &fd_map[tgt_fd];
267    fdo->fd = sim_fd;
268}
269
270
271// generate new target fd for sim_fd
272int
273Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
274{
275    // in case open() returns an error, don't allocate a new fd
276    if (sim_fd == -1)
277        return -1;
278
279    // find first free target fd
280    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
281        Process::FdMap *fdo = &fd_map[free_fd];
282        if (fdo->fd == -1 && fdo->driver == NULL) {
283            fdo->fd = sim_fd;
284            fdo->filename = filename;
285            fdo->mode = mode;
286            fdo->fileOffset = 0;
287            fdo->flags = flags;
288            fdo->isPipe = pipe;
289            fdo->readPipeSource = 0;
290            return free_fd;
291        }
292    }
293
294    panic("Process::alloc_fd: out of file descriptors!");
295}
296
297
298// free target fd (e.g., after close)
299void
300Process::free_fd(int tgt_fd)
301{
302    Process::FdMap *fdo = &fd_map[tgt_fd];
303    if (fdo->fd == -1)
304        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
305
306    fdo->fd = -1;
307    fdo->filename = "NULL";
308    fdo->mode = 0;
309    fdo->fileOffset = 0;
310    fdo->flags = 0;
311    fdo->isPipe = false;
312    fdo->readPipeSource = 0;
313    fdo->driver = NULL;
314}
315
316
317// look up simulator fd for given target fd
318int
319Process::sim_fd(int tgt_fd)
320{
321    if (tgt_fd < 0 || tgt_fd > MAX_FD)
322        return -1;
323
324    return fd_map[tgt_fd].fd;
325}
326
327Process::FdMap *
328Process::sim_fd_obj(int tgt_fd)
329{
330    if (tgt_fd < 0 || tgt_fd > MAX_FD)
331        return NULL;
332
333    return &fd_map[tgt_fd];
334}
335
336void
337Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
338{
339    int npages = divCeil(size, (int64_t)PageBytes);
340    Addr paddr = system->allocPhysPages(npages);
341    pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
342}
343
344bool
345Process::fixupStackFault(Addr vaddr)
346{
347    // Check if this is already on the stack and there's just no page there
348    // yet.
349    if (vaddr >= stack_min && vaddr < stack_base) {
350        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
351        return true;
352    }
353
354    // We've accessed the next page of the stack, so extend it to include
355    // this address.
356    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
357        while (vaddr < stack_min) {
358            stack_min -= TheISA::PageBytes;
359            if (stack_base - stack_min > max_stack_size)
360                fatal("Maximum stack size exceeded\n");
361            allocateMem(stack_min, TheISA::PageBytes);
362            inform("Increasing stack size by one page.");
363        };
364        return true;
365    }
366    return false;
367}
368
369// find all offsets for currently open files and save them
370void
371Process::fix_file_offsets()
372{
373    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
374    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
375    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
376    string in = fdo_stdin->filename;
377    string out = fdo_stdout->filename;
378    string err = fdo_stderr->filename;
379
380    // initialize file descriptors to default: same as simulator
381    int stdin_fd, stdout_fd, stderr_fd;
382
383    if (in == "stdin" || in == "cin")
384        stdin_fd = STDIN_FILENO;
385    else if (in == "None")
386        stdin_fd = -1;
387    else {
388        // open standard in and seek to the right location
389        stdin_fd = Process::openInputFile(in);
390        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
391            panic("Unable to seek to correct location in file: %s", in);
392    }
393
394    if (out == "stdout" || out == "cout")
395        stdout_fd = STDOUT_FILENO;
396    else if (out == "stderr" || out == "cerr")
397        stdout_fd = STDERR_FILENO;
398    else if (out == "None")
399        stdout_fd = -1;
400    else {
401        stdout_fd = Process::openOutputFile(out);
402        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
403            panic("Unable to seek to correct location in file: %s", out);
404    }
405
406    if (err == "stdout" || err == "cout")
407        stderr_fd = STDOUT_FILENO;
408    else if (err == "stderr" || err == "cerr")
409        stderr_fd = STDERR_FILENO;
410    else if (err == "None")
411        stderr_fd = -1;
412    else if (err == out)
413        stderr_fd = stdout_fd;
414    else {
415        stderr_fd = Process::openOutputFile(err);
416        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
417            panic("Unable to seek to correct location in file: %s", err);
418    }
419
420    fdo_stdin->fd = stdin_fd;
421    fdo_stdout->fd = stdout_fd;
422    fdo_stderr->fd = stderr_fd;
423
424
425    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
426        Process::FdMap *fdo = &fd_map[free_fd];
427        if (fdo->fd != -1) {
428            if (fdo->isPipe){
429                if (fdo->filename == "PIPE-WRITE")
430                    continue;
431                else {
432                    assert (fdo->filename == "PIPE-READ");
433                    //create a new pipe
434                    int fds[2];
435                    int pipe_retval = pipe(fds);
436
437                    if (pipe_retval < 0) {
438                        // error
439                        panic("Unable to create new pipe.");
440                    }
441                    fdo->fd = fds[0]; //set read pipe
442                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
443                    if (fdo_write->filename != "PIPE-WRITE")
444                        panic ("Couldn't find write end of the pipe");
445
446                    fdo_write->fd = fds[1];//set write pipe
447               }
448            } else {
449                //Open file
450                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
451
452                if (fd == -1)
453                    panic("Unable to open file: %s", fdo->filename);
454                fdo->fd = fd;
455
456                //Seek to correct location before checkpoint
457                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
458                    panic("Unable to seek to correct location in file: %s",
459                          fdo->filename);
460            }
461        }
462    }
463}
464
465void
466Process::find_file_offsets()
467{
468    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
469        Process::FdMap *fdo = &fd_map[free_fd];
470        if (fdo->fd != -1) {
471            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
472        } else {
473                fdo->filename = "NULL";
474                fdo->fileOffset = 0;
475        }
476    }
477}
478
479void
480Process::setReadPipeSource(int read_pipe_fd, int source_fd)
481{
482    Process::FdMap *fdo = &fd_map[read_pipe_fd];
483    fdo->readPipeSource = source_fd;
484}
485
486void
487Process::FdMap::serialize(std::ostream &os)
488{
489    SERIALIZE_SCALAR(fd);
490    SERIALIZE_SCALAR(isPipe);
491    SERIALIZE_SCALAR(filename);
492    SERIALIZE_SCALAR(flags);
493    SERIALIZE_SCALAR(readPipeSource);
494    SERIALIZE_SCALAR(fileOffset);
495}
496
497void
498Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
499{
500    UNSERIALIZE_SCALAR(fd);
501    UNSERIALIZE_SCALAR(isPipe);
502    UNSERIALIZE_SCALAR(filename);
503    UNSERIALIZE_SCALAR(flags);
504    UNSERIALIZE_SCALAR(readPipeSource);
505    UNSERIALIZE_SCALAR(fileOffset);
506}
507
508void
509Process::serialize(std::ostream &os)
510{
511    SERIALIZE_SCALAR(brk_point);
512    SERIALIZE_SCALAR(stack_base);
513    SERIALIZE_SCALAR(stack_size);
514    SERIALIZE_SCALAR(stack_min);
515    SERIALIZE_SCALAR(next_thread_stack_base);
516    SERIALIZE_SCALAR(mmap_start);
517    SERIALIZE_SCALAR(mmap_end);
518    SERIALIZE_SCALAR(nxm_start);
519    SERIALIZE_SCALAR(nxm_end);
520    find_file_offsets();
521    pTable->serialize(os);
522    for (int x = 0; x <= MAX_FD; x++) {
523        nameOut(os, csprintf("%s.FdMap%d", name(), x));
524        fd_map[x].serialize(os);
525    }
526    SERIALIZE_SCALAR(M5_pid);
527
528}
529
530void
531Process::unserialize(Checkpoint *cp, const std::string &section)
532{
533    UNSERIALIZE_SCALAR(brk_point);
534    UNSERIALIZE_SCALAR(stack_base);
535    UNSERIALIZE_SCALAR(stack_size);
536    UNSERIALIZE_SCALAR(stack_min);
537    UNSERIALIZE_SCALAR(next_thread_stack_base);
538    UNSERIALIZE_SCALAR(mmap_start);
539    UNSERIALIZE_SCALAR(mmap_end);
540    UNSERIALIZE_SCALAR(nxm_start);
541    UNSERIALIZE_SCALAR(nxm_end);
542    pTable->unserialize(cp, section);
543    for (int x = 0; x <= MAX_FD; x++) {
544        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
545    }
546    fix_file_offsets();
547    UNSERIALIZE_OPT_SCALAR(M5_pid);
548    // The above returns a bool so that you could do something if you don't
549    // find the param in the checkpoint if you wanted to, like set a default
550    // but in this case we'll just stick with the instantianted value if not
551    // found.
552}
553
554
555bool
556Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
557{
558    pTable->map(vaddr, paddr, size,
559                cacheable ? 0 : PageTableBase::Uncacheable);
560    return true;
561}
562
563
564////////////////////////////////////////////////////////////////////////
565//
566// LiveProcess member definitions
567//
568////////////////////////////////////////////////////////////////////////
569
570
571LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
572    : Process(params), objFile(_objFile),
573      argv(params->cmd), envp(params->env), cwd(params->cwd),
574      __uid(params->uid), __euid(params->euid),
575      __gid(params->gid), __egid(params->egid),
576      __pid(params->pid), __ppid(params->ppid),
577      drivers(params->drivers)
578{
579
580    // load up symbols, if any... these may be used for debugging or
581    // profiling.
582    if (!debugSymbolTable) {
583        debugSymbolTable = new SymbolTable();
584        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
585            !objFile->loadLocalSymbols(debugSymbolTable) ||
586            !objFile->loadWeakSymbols(debugSymbolTable)) {
587            // didn't load any symbols
588            delete debugSymbolTable;
589            debugSymbolTable = NULL;
590        }
591    }
592}
593
594void
595LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
596{
597    num_syscalls++;
598
599    SyscallDesc *desc = getDesc(callnum);
600    if (desc == NULL)
601        fatal("Syscall %d out of range", callnum);
602
603    desc->doSyscall(callnum, this, tc);
604}
605
606IntReg
607LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
608{
609    return getSyscallArg(tc, i);
610}
611
612
613EmulatedDriver *
614LiveProcess::findDriver(std::string filename)
615{
616    for (EmulatedDriver *d : drivers) {
617        if (d->match(filename))
618            return d;
619    }
620
621    return NULL;
622}
623
624
625LiveProcess *
626LiveProcess::create(LiveProcessParams * params)
627{
628    LiveProcess *process = NULL;
629
630    string executable =
631        params->executable == "" ? params->cmd[0] : params->executable;
632    ObjectFile *objFile = createObjectFile(executable);
633    if (objFile == NULL) {
634        fatal("Can't load object file %s", executable);
635    }
636
637    if (objFile->isDynamic())
638       fatal("Object file is a dynamic executable however only static "
639             "executables are supported!\n       Please recompile your "
640             "executable as a static binary and try again.\n");
641
642#if THE_ISA == ALPHA_ISA
643    if (objFile->getArch() != ObjectFile::Alpha)
644        fatal("Object file architecture does not match compiled ISA (Alpha).");
645
646    switch (objFile->getOpSys()) {
647      case ObjectFile::Tru64:
648        process = new AlphaTru64Process(params, objFile);
649        break;
650
651      case ObjectFile::UnknownOpSys:
652        warn("Unknown operating system; assuming Linux.");
653        // fall through
654      case ObjectFile::Linux:
655        process = new AlphaLinuxProcess(params, objFile);
656        break;
657
658      default:
659        fatal("Unknown/unsupported operating system.");
660    }
661#elif THE_ISA == SPARC_ISA
662    if (objFile->getArch() != ObjectFile::SPARC64 &&
663        objFile->getArch() != ObjectFile::SPARC32)
664        fatal("Object file architecture does not match compiled ISA (SPARC).");
665    switch (objFile->getOpSys()) {
666      case ObjectFile::UnknownOpSys:
667        warn("Unknown operating system; assuming Linux.");
668        // fall through
669      case ObjectFile::Linux:
670        if (objFile->getArch() == ObjectFile::SPARC64) {
671            process = new Sparc64LinuxProcess(params, objFile);
672        } else {
673            process = new Sparc32LinuxProcess(params, objFile);
674        }
675        break;
676
677
678      case ObjectFile::Solaris:
679        process = new SparcSolarisProcess(params, objFile);
680        break;
681
682      default:
683        fatal("Unknown/unsupported operating system.");
684    }
685#elif THE_ISA == X86_ISA
686    if (objFile->getArch() != ObjectFile::X86_64 &&
687        objFile->getArch() != ObjectFile::I386)
688        fatal("Object file architecture does not match compiled ISA (x86).");
689    switch (objFile->getOpSys()) {
690      case ObjectFile::UnknownOpSys:
691        warn("Unknown operating system; assuming Linux.");
692        // fall through
693      case ObjectFile::Linux:
694        if (objFile->getArch() == ObjectFile::X86_64) {
695            process = new X86_64LinuxProcess(params, objFile);
696        } else {
697            process = new I386LinuxProcess(params, objFile);
698        }
699        break;
700
701      default:
702        fatal("Unknown/unsupported operating system.");
703    }
704#elif THE_ISA == MIPS_ISA
705    if (objFile->getArch() != ObjectFile::Mips)
706        fatal("Object file architecture does not match compiled ISA (MIPS).");
707    switch (objFile->getOpSys()) {
708      case ObjectFile::UnknownOpSys:
709        warn("Unknown operating system; assuming Linux.");
710        // fall through
711      case ObjectFile::Linux:
712        process = new MipsLinuxProcess(params, objFile);
713        break;
714
715      default:
716        fatal("Unknown/unsupported operating system.");
717    }
718#elif THE_ISA == ARM_ISA
719    ObjectFile::Arch arch = objFile->getArch();
720    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
721        arch != ObjectFile::Arm64)
722        fatal("Object file architecture does not match compiled ISA (ARM).");
723    switch (objFile->getOpSys()) {
724      case ObjectFile::UnknownOpSys:
725        warn("Unknown operating system; assuming Linux.");
726        // fall through
727      case ObjectFile::Linux:
728        if (arch == ObjectFile::Arm64) {
729            process = new ArmLinuxProcess64(params, objFile,
730                                            objFile->getArch());
731        } else {
732            process = new ArmLinuxProcess32(params, objFile,
733                                            objFile->getArch());
734        }
735        break;
736      case ObjectFile::LinuxArmOABI:
737        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
738              " EABI compiler.");
739      default:
740        fatal("Unknown/unsupported operating system.");
741    }
742#elif THE_ISA == POWER_ISA
743    if (objFile->getArch() != ObjectFile::Power)
744        fatal("Object file architecture does not match compiled ISA (Power).");
745    switch (objFile->getOpSys()) {
746      case ObjectFile::UnknownOpSys:
747        warn("Unknown operating system; assuming Linux.");
748        // fall through
749      case ObjectFile::Linux:
750        process = new PowerLinuxProcess(params, objFile);
751        break;
752
753      default:
754        fatal("Unknown/unsupported operating system.");
755    }
756#else
757#error "THE_ISA not set"
758#endif
759
760    if (process == NULL)
761        fatal("Unknown error creating process object.");
762    return process;
763}
764
765LiveProcess *
766LiveProcessParams::create()
767{
768    return LiveProcess::create(this);
769}
770