process.cc revision 10407:a9023811bf9e 
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      pTable(useArchPT ?
111        static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
112        static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
113      initVirtMem(system->getSystemPort(), this,
114                  SETranslatingPortProxy::Always)
115{
116    string in = params->input;
117    string out = params->output;
118    string err = params->errout;
119
120    // initialize file descriptors to default: same as simulator
121    int stdin_fd, stdout_fd, stderr_fd;
122
123    if (in == "stdin" || in == "cin")
124        stdin_fd = STDIN_FILENO;
125    else if (in == "None")
126        stdin_fd = -1;
127    else
128        stdin_fd = Process::openInputFile(in);
129
130    if (out == "stdout" || out == "cout")
131        stdout_fd = STDOUT_FILENO;
132    else if (out == "stderr" || out == "cerr")
133        stdout_fd = STDERR_FILENO;
134    else if (out == "None")
135        stdout_fd = -1;
136    else
137        stdout_fd = Process::openOutputFile(out);
138
139    if (err == "stdout" || err == "cout")
140        stderr_fd = STDOUT_FILENO;
141    else if (err == "stderr" || err == "cerr")
142        stderr_fd = STDERR_FILENO;
143    else if (err == "None")
144        stderr_fd = -1;
145    else if (err == out)
146        stderr_fd = stdout_fd;
147    else
148        stderr_fd = Process::openOutputFile(err);
149
150    // initialize first 3 fds (stdin, stdout, stderr)
151    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
152    fdo->fd = stdin_fd;
153    fdo->filename = in;
154    fdo->flags = O_RDONLY;
155    fdo->mode = -1;
156    fdo->fileOffset = 0;
157
158    fdo =  &fd_map[STDOUT_FILENO];
159    fdo->fd = stdout_fd;
160    fdo->filename = out;
161    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
162    fdo->mode = 0774;
163    fdo->fileOffset = 0;
164
165    fdo = &fd_map[STDERR_FILENO];
166    fdo->fd = stderr_fd;
167    fdo->filename = err;
168    fdo->flags = O_WRONLY;
169    fdo->mode = -1;
170    fdo->fileOffset = 0;
171
172
173    // mark remaining fds as free
174    for (int i = 3; i <= MAX_FD; ++i) {
175        fdo = &fd_map[i];
176        fdo->fd = -1;
177    }
178
179    mmap_start = mmap_end = 0;
180    nxm_start = nxm_end = 0;
181    // other parameters will be initialized when the program is loaded
182}
183
184
185void
186Process::regStats()
187{
188    using namespace Stats;
189
190    num_syscalls
191        .name(name() + ".num_syscalls")
192        .desc("Number of system calls")
193        ;
194}
195
196//
197// static helper functions
198//
199int
200Process::openInputFile(const string &filename)
201{
202    int fd = open(filename.c_str(), O_RDONLY);
203
204    if (fd == -1) {
205        perror(NULL);
206        cerr << "unable to open \"" << filename << "\" for reading\n";
207        fatal("can't open input file");
208    }
209
210    return fd;
211}
212
213
214int
215Process::openOutputFile(const string &filename)
216{
217    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
218
219    if (fd == -1) {
220        perror(NULL);
221        cerr << "unable to open \"" << filename << "\" for writing\n";
222        fatal("can't open output file");
223    }
224
225    return fd;
226}
227
228ThreadContext *
229Process::findFreeContext()
230{
231    int size = contextIds.size();
232    ThreadContext *tc;
233    for (int i = 0; i < size; ++i) {
234        tc = system->getThreadContext(contextIds[i]);
235        if (tc->status() == ThreadContext::Halted) {
236            // inactive context, free to use
237            return tc;
238        }
239    }
240    return NULL;
241}
242
243void
244Process::initState()
245{
246    if (contextIds.empty())
247        fatal("Process %s is not associated with any HW contexts!\n", name());
248
249    // first thread context for this process... initialize & enable
250    ThreadContext *tc = system->getThreadContext(contextIds[0]);
251
252    // mark this context as active so it will start ticking.
253    tc->activate();
254
255    pTable->initState(tc);
256}
257
258// map simulator fd sim_fd to target fd tgt_fd
259void
260Process::dup_fd(int sim_fd, int tgt_fd)
261{
262    if (tgt_fd < 0 || tgt_fd > MAX_FD)
263        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
264
265    Process::FdMap *fdo = &fd_map[tgt_fd];
266    fdo->fd = sim_fd;
267}
268
269
270// generate new target fd for sim_fd
271int
272Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
273{
274    // in case open() returns an error, don't allocate a new fd
275    if (sim_fd == -1)
276        return -1;
277
278    // find first free target fd
279    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
280        Process::FdMap *fdo = &fd_map[free_fd];
281        if (fdo->fd == -1) {
282            fdo->fd = sim_fd;
283            fdo->filename = filename;
284            fdo->mode = mode;
285            fdo->fileOffset = 0;
286            fdo->flags = flags;
287            fdo->isPipe = pipe;
288            fdo->readPipeSource = 0;
289            return free_fd;
290        }
291    }
292
293    panic("Process::alloc_fd: out of file descriptors!");
294}
295
296
297// free target fd (e.g., after close)
298void
299Process::free_fd(int tgt_fd)
300{
301    Process::FdMap *fdo = &fd_map[tgt_fd];
302    if (fdo->fd == -1)
303        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
304
305    fdo->fd = -1;
306    fdo->filename = "NULL";
307    fdo->mode = 0;
308    fdo->fileOffset = 0;
309    fdo->flags = 0;
310    fdo->isPipe = false;
311    fdo->readPipeSource = 0;
312}
313
314
315// look up simulator fd for given target fd
316int
317Process::sim_fd(int tgt_fd)
318{
319    if (tgt_fd < 0 || tgt_fd > MAX_FD)
320        return -1;
321
322    return fd_map[tgt_fd].fd;
323}
324
325Process::FdMap *
326Process::sim_fd_obj(int tgt_fd)
327{
328    if (tgt_fd < 0 || tgt_fd > MAX_FD)
329        return NULL;
330
331    return &fd_map[tgt_fd];
332}
333
334void
335Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
336{
337    int npages = divCeil(size, (int64_t)PageBytes);
338    Addr paddr = system->allocPhysPages(npages);
339    pTable->map(vaddr, paddr, size, clobber);
340}
341
342bool
343Process::fixupStackFault(Addr vaddr)
344{
345    // Check if this is already on the stack and there's just no page there
346    // yet.
347    if (vaddr >= stack_min && vaddr < stack_base) {
348        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
349        return true;
350    }
351
352    // We've accessed the next page of the stack, so extend it to include
353    // this address.
354    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
355        while (vaddr < stack_min) {
356            stack_min -= TheISA::PageBytes;
357            if (stack_base - stack_min > max_stack_size)
358                fatal("Maximum stack size exceeded\n");
359            allocateMem(stack_min, TheISA::PageBytes);
360            inform("Increasing stack size by one page.");
361        };
362        return true;
363    }
364    return false;
365}
366
367// find all offsets for currently open files and save them
368void
369Process::fix_file_offsets()
370{
371    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
372    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
373    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
374    string in = fdo_stdin->filename;
375    string out = fdo_stdout->filename;
376    string err = fdo_stderr->filename;
377
378    // initialize file descriptors to default: same as simulator
379    int stdin_fd, stdout_fd, stderr_fd;
380
381    if (in == "stdin" || in == "cin")
382        stdin_fd = STDIN_FILENO;
383    else if (in == "None")
384        stdin_fd = -1;
385    else {
386        // open standard in and seek to the right location
387        stdin_fd = Process::openInputFile(in);
388        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
389            panic("Unable to seek to correct location in file: %s", in);
390    }
391
392    if (out == "stdout" || out == "cout")
393        stdout_fd = STDOUT_FILENO;
394    else if (out == "stderr" || out == "cerr")
395        stdout_fd = STDERR_FILENO;
396    else if (out == "None")
397        stdout_fd = -1;
398    else {
399        stdout_fd = Process::openOutputFile(out);
400        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
401            panic("Unable to seek to correct location in file: %s", out);
402    }
403
404    if (err == "stdout" || err == "cout")
405        stderr_fd = STDOUT_FILENO;
406    else if (err == "stderr" || err == "cerr")
407        stderr_fd = STDERR_FILENO;
408    else if (err == "None")
409        stderr_fd = -1;
410    else if (err == out)
411        stderr_fd = stdout_fd;
412    else {
413        stderr_fd = Process::openOutputFile(err);
414        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
415            panic("Unable to seek to correct location in file: %s", err);
416    }
417
418    fdo_stdin->fd = stdin_fd;
419    fdo_stdout->fd = stdout_fd;
420    fdo_stderr->fd = stderr_fd;
421
422
423    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
424        Process::FdMap *fdo = &fd_map[free_fd];
425        if (fdo->fd != -1) {
426            if (fdo->isPipe){
427                if (fdo->filename == "PIPE-WRITE")
428                    continue;
429                else {
430                    assert (fdo->filename == "PIPE-READ");
431                    //create a new pipe
432                    int fds[2];
433                    int pipe_retval = pipe(fds);
434
435                    if (pipe_retval < 0) {
436                        // error
437                        panic("Unable to create new pipe.");
438                    }
439                    fdo->fd = fds[0]; //set read pipe
440                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
441                    if (fdo_write->filename != "PIPE-WRITE")
442                        panic ("Couldn't find write end of the pipe");
443
444                    fdo_write->fd = fds[1];//set write pipe
445               }
446            } else {
447                //Open file
448                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
449
450                if (fd == -1)
451                    panic("Unable to open file: %s", fdo->filename);
452                fdo->fd = fd;
453
454                //Seek to correct location before checkpoint
455                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
456                    panic("Unable to seek to correct location in file: %s",
457                          fdo->filename);
458            }
459        }
460    }
461}
462
463void
464Process::find_file_offsets()
465{
466    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
467        Process::FdMap *fdo = &fd_map[free_fd];
468        if (fdo->fd != -1) {
469            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
470        } else {
471                fdo->filename = "NULL";
472                fdo->fileOffset = 0;
473        }
474    }
475}
476
477void
478Process::setReadPipeSource(int read_pipe_fd, int source_fd)
479{
480    Process::FdMap *fdo = &fd_map[read_pipe_fd];
481    fdo->readPipeSource = source_fd;
482}
483
484void
485Process::FdMap::serialize(std::ostream &os)
486{
487    SERIALIZE_SCALAR(fd);
488    SERIALIZE_SCALAR(isPipe);
489    SERIALIZE_SCALAR(filename);
490    SERIALIZE_SCALAR(flags);
491    SERIALIZE_SCALAR(readPipeSource);
492    SERIALIZE_SCALAR(fileOffset);
493}
494
495void
496Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
497{
498    UNSERIALIZE_SCALAR(fd);
499    UNSERIALIZE_SCALAR(isPipe);
500    UNSERIALIZE_SCALAR(filename);
501    UNSERIALIZE_SCALAR(flags);
502    UNSERIALIZE_SCALAR(readPipeSource);
503    UNSERIALIZE_SCALAR(fileOffset);
504}
505
506void
507Process::serialize(std::ostream &os)
508{
509    SERIALIZE_SCALAR(brk_point);
510    SERIALIZE_SCALAR(stack_base);
511    SERIALIZE_SCALAR(stack_size);
512    SERIALIZE_SCALAR(stack_min);
513    SERIALIZE_SCALAR(next_thread_stack_base);
514    SERIALIZE_SCALAR(mmap_start);
515    SERIALIZE_SCALAR(mmap_end);
516    SERIALIZE_SCALAR(nxm_start);
517    SERIALIZE_SCALAR(nxm_end);
518    find_file_offsets();
519    pTable->serialize(os);
520    for (int x = 0; x <= MAX_FD; x++) {
521        nameOut(os, csprintf("%s.FdMap%d", name(), x));
522        fd_map[x].serialize(os);
523    }
524    SERIALIZE_SCALAR(M5_pid);
525
526}
527
528void
529Process::unserialize(Checkpoint *cp, const std::string &section)
530{
531    UNSERIALIZE_SCALAR(brk_point);
532    UNSERIALIZE_SCALAR(stack_base);
533    UNSERIALIZE_SCALAR(stack_size);
534    UNSERIALIZE_SCALAR(stack_min);
535    UNSERIALIZE_SCALAR(next_thread_stack_base);
536    UNSERIALIZE_SCALAR(mmap_start);
537    UNSERIALIZE_SCALAR(mmap_end);
538    UNSERIALIZE_SCALAR(nxm_start);
539    UNSERIALIZE_SCALAR(nxm_end);
540    pTable->unserialize(cp, section);
541    for (int x = 0; x <= MAX_FD; x++) {
542        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
543    }
544    fix_file_offsets();
545    UNSERIALIZE_OPT_SCALAR(M5_pid);
546    // The above returns a bool so that you could do something if you don't
547    // find the param in the checkpoint if you wanted to, like set a default
548    // but in this case we'll just stick with the instantianted value if not
549    // found.
550}
551
552
553bool
554Process::map(Addr vaddr, Addr paddr, int size)
555{
556    pTable->map(vaddr, paddr, size);
557    return true;
558}
559
560
561////////////////////////////////////////////////////////////////////////
562//
563// LiveProcess member definitions
564//
565////////////////////////////////////////////////////////////////////////
566
567
568LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
569    : Process(params), objFile(_objFile),
570      argv(params->cmd), envp(params->env), cwd(params->cwd)
571{
572    __uid = params->uid;
573    __euid = params->euid;
574    __gid = params->gid;
575    __egid = params->egid;
576    __pid = params->pid;
577    __ppid = params->ppid;
578
579    // load up symbols, if any... these may be used for debugging or
580    // profiling.
581    if (!debugSymbolTable) {
582        debugSymbolTable = new SymbolTable();
583        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
584            !objFile->loadLocalSymbols(debugSymbolTable) ||
585            !objFile->loadWeakSymbols(debugSymbolTable)) {
586            // didn't load any symbols
587            delete debugSymbolTable;
588            debugSymbolTable = NULL;
589        }
590    }
591}
592
593void
594LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
595{
596    num_syscalls++;
597
598    SyscallDesc *desc = getDesc(callnum);
599    if (desc == NULL)
600        fatal("Syscall %d out of range", callnum);
601
602    desc->doSyscall(callnum, this, tc);
603}
604
605IntReg
606LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
607{
608    return getSyscallArg(tc, i);
609}
610
611LiveProcess *
612LiveProcess::create(LiveProcessParams * params)
613{
614    LiveProcess *process = NULL;
615
616    string executable =
617        params->executable == "" ? params->cmd[0] : params->executable;
618    ObjectFile *objFile = createObjectFile(executable);
619    if (objFile == NULL) {
620        fatal("Can't load object file %s", executable);
621    }
622
623    if (objFile->isDynamic())
624       fatal("Object file is a dynamic executable however only static "
625             "executables are supported!\n       Please recompile your "
626             "executable as a static binary and try again.\n");
627
628#if THE_ISA == ALPHA_ISA
629    if (objFile->getArch() != ObjectFile::Alpha)
630        fatal("Object file architecture does not match compiled ISA (Alpha).");
631
632    switch (objFile->getOpSys()) {
633      case ObjectFile::Tru64:
634        process = new AlphaTru64Process(params, objFile);
635        break;
636
637      case ObjectFile::UnknownOpSys:
638        warn("Unknown operating system; assuming Linux.");
639        // fall through
640      case ObjectFile::Linux:
641        process = new AlphaLinuxProcess(params, objFile);
642        break;
643
644      default:
645        fatal("Unknown/unsupported operating system.");
646    }
647#elif THE_ISA == SPARC_ISA
648    if (objFile->getArch() != ObjectFile::SPARC64 &&
649        objFile->getArch() != ObjectFile::SPARC32)
650        fatal("Object file architecture does not match compiled ISA (SPARC).");
651    switch (objFile->getOpSys()) {
652      case ObjectFile::UnknownOpSys:
653        warn("Unknown operating system; assuming Linux.");
654        // fall through
655      case ObjectFile::Linux:
656        if (objFile->getArch() == ObjectFile::SPARC64) {
657            process = new Sparc64LinuxProcess(params, objFile);
658        } else {
659            process = new Sparc32LinuxProcess(params, objFile);
660        }
661        break;
662
663
664      case ObjectFile::Solaris:
665        process = new SparcSolarisProcess(params, objFile);
666        break;
667
668      default:
669        fatal("Unknown/unsupported operating system.");
670    }
671#elif THE_ISA == X86_ISA
672    if (objFile->getArch() != ObjectFile::X86_64 &&
673        objFile->getArch() != ObjectFile::I386)
674        fatal("Object file architecture does not match compiled ISA (x86).");
675    switch (objFile->getOpSys()) {
676      case ObjectFile::UnknownOpSys:
677        warn("Unknown operating system; assuming Linux.");
678        // fall through
679      case ObjectFile::Linux:
680        if (objFile->getArch() == ObjectFile::X86_64) {
681            process = new X86_64LinuxProcess(params, objFile);
682        } else {
683            process = new I386LinuxProcess(params, objFile);
684        }
685        break;
686
687      default:
688        fatal("Unknown/unsupported operating system.");
689    }
690#elif THE_ISA == MIPS_ISA
691    if (objFile->getArch() != ObjectFile::Mips)
692        fatal("Object file architecture does not match compiled ISA (MIPS).");
693    switch (objFile->getOpSys()) {
694      case ObjectFile::UnknownOpSys:
695        warn("Unknown operating system; assuming Linux.");
696        // fall through
697      case ObjectFile::Linux:
698        process = new MipsLinuxProcess(params, objFile);
699        break;
700
701      default:
702        fatal("Unknown/unsupported operating system.");
703    }
704#elif THE_ISA == ARM_ISA
705    ObjectFile::Arch arch = objFile->getArch();
706    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
707        arch != ObjectFile::Arm64)
708        fatal("Object file architecture does not match compiled ISA (ARM).");
709    switch (objFile->getOpSys()) {
710      case ObjectFile::UnknownOpSys:
711        warn("Unknown operating system; assuming Linux.");
712        // fall through
713      case ObjectFile::Linux:
714        if (arch == ObjectFile::Arm64) {
715            process = new ArmLinuxProcess64(params, objFile,
716                                            objFile->getArch());
717        } else {
718            process = new ArmLinuxProcess32(params, objFile,
719                                            objFile->getArch());
720        }
721        break;
722      case ObjectFile::LinuxArmOABI:
723        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
724              " EABI compiler.");
725      default:
726        fatal("Unknown/unsupported operating system.");
727    }
728#elif THE_ISA == POWER_ISA
729    if (objFile->getArch() != ObjectFile::Power)
730        fatal("Object file architecture does not match compiled ISA (Power).");
731    switch (objFile->getOpSys()) {
732      case ObjectFile::UnknownOpSys:
733        warn("Unknown operating system; assuming Linux.");
734        // fall through
735      case ObjectFile::Linux:
736        process = new PowerLinuxProcess(params, objFile);
737        break;
738
739      default:
740        fatal("Unknown/unsupported operating system.");
741    }
742#else
743#error "THE_ISA not set"
744#endif
745
746    if (process == NULL)
747        fatal("Unknown error creating process object.");
748    return process;
749}
750
751LiveProcess *
752LiveProcessParams::create()
753{
754    return LiveProcess::create(this);
755}
756