process.cc revision 10037:5cac77888310 
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2001-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 *          Steve Reinhardt
42 *          Ali Saidi
43 */
44
45#include <fcntl.h>
46#include <unistd.h>
47
48#include <cstdio>
49#include <string>
50
51#include "base/loader/object_file.hh"
52#include "base/loader/symtab.hh"
53#include "base/intmath.hh"
54#include "base/statistics.hh"
55#include "config/the_isa.hh"
56#include "cpu/thread_context.hh"
57#include "mem/page_table.hh"
58#include "mem/se_translating_port_proxy.hh"
59#include "params/LiveProcess.hh"
60#include "params/Process.hh"
61#include "sim/debug.hh"
62#include "sim/process.hh"
63#include "sim/process_impl.hh"
64#include "sim/stats.hh"
65#include "sim/syscall_emul.hh"
66#include "sim/system.hh"
67
68#if THE_ISA == ALPHA_ISA
69#include "arch/alpha/linux/process.hh"
70#include "arch/alpha/tru64/process.hh"
71#elif THE_ISA == SPARC_ISA
72#include "arch/sparc/linux/process.hh"
73#include "arch/sparc/solaris/process.hh"
74#elif THE_ISA == MIPS_ISA
75#include "arch/mips/linux/process.hh"
76#elif THE_ISA == ARM_ISA
77#include "arch/arm/linux/process.hh"
78#elif THE_ISA == X86_ISA
79#include "arch/x86/linux/process.hh"
80#elif THE_ISA == POWER_ISA
81#include "arch/power/linux/process.hh"
82#else
83#error "THE_ISA not set"
84#endif
85
86
87using namespace std;
88using namespace TheISA;
89
90// current number of allocated processes
91int num_processes = 0;
92
93template<class IntType>
94AuxVector<IntType>::AuxVector(IntType type, IntType val)
95{
96    a_type = TheISA::htog(type);
97    a_val = TheISA::htog(val);
98}
99
100template struct AuxVector<uint32_t>;
101template struct AuxVector<uint64_t>;
102
103Process::Process(ProcessParams * params)
104    : SimObject(params), system(params->system),
105      max_stack_size(params->max_stack_size),
106      M5_pid(system->allocatePID()),
107      pTable(new PageTable(name(), M5_pid)),
108      initVirtMem(system->getSystemPort(), this,
109                  SETranslatingPortProxy::Always)
110{
111    string in = params->input;
112    string out = params->output;
113    string err = params->errout;
114
115    // initialize file descriptors to default: same as simulator
116    int stdin_fd, stdout_fd, stderr_fd;
117
118    if (in == "stdin" || in == "cin")
119        stdin_fd = STDIN_FILENO;
120    else if (in == "None")
121        stdin_fd = -1;
122    else
123        stdin_fd = Process::openInputFile(in);
124
125    if (out == "stdout" || out == "cout")
126        stdout_fd = STDOUT_FILENO;
127    else if (out == "stderr" || out == "cerr")
128        stdout_fd = STDERR_FILENO;
129    else if (out == "None")
130        stdout_fd = -1;
131    else
132        stdout_fd = Process::openOutputFile(out);
133
134    if (err == "stdout" || err == "cout")
135        stderr_fd = STDOUT_FILENO;
136    else if (err == "stderr" || err == "cerr")
137        stderr_fd = STDERR_FILENO;
138    else if (err == "None")
139        stderr_fd = -1;
140    else if (err == out)
141        stderr_fd = stdout_fd;
142    else
143        stderr_fd = Process::openOutputFile(err);
144
145    // initialize first 3 fds (stdin, stdout, stderr)
146    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
147    fdo->fd = stdin_fd;
148    fdo->filename = in;
149    fdo->flags = O_RDONLY;
150    fdo->mode = -1;
151    fdo->fileOffset = 0;
152
153    fdo =  &fd_map[STDOUT_FILENO];
154    fdo->fd = stdout_fd;
155    fdo->filename = out;
156    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
157    fdo->mode = 0774;
158    fdo->fileOffset = 0;
159
160    fdo = &fd_map[STDERR_FILENO];
161    fdo->fd = stderr_fd;
162    fdo->filename = err;
163    fdo->flags = O_WRONLY;
164    fdo->mode = -1;
165    fdo->fileOffset = 0;
166
167
168    // mark remaining fds as free
169    for (int i = 3; i <= MAX_FD; ++i) {
170        fdo = &fd_map[i];
171        fdo->fd = -1;
172    }
173
174    mmap_start = mmap_end = 0;
175    nxm_start = nxm_end = 0;
176    // other parameters will be initialized when the program is loaded
177}
178
179
180void
181Process::regStats()
182{
183    using namespace Stats;
184
185    num_syscalls
186        .name(name() + ".num_syscalls")
187        .desc("Number of system calls")
188        ;
189}
190
191//
192// static helper functions
193//
194int
195Process::openInputFile(const string &filename)
196{
197    int fd = open(filename.c_str(), O_RDONLY);
198
199    if (fd == -1) {
200        perror(NULL);
201        cerr << "unable to open \"" << filename << "\" for reading\n";
202        fatal("can't open input file");
203    }
204
205    return fd;
206}
207
208
209int
210Process::openOutputFile(const string &filename)
211{
212    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
213
214    if (fd == -1) {
215        perror(NULL);
216        cerr << "unable to open \"" << filename << "\" for writing\n";
217        fatal("can't open output file");
218    }
219
220    return fd;
221}
222
223ThreadContext *
224Process::findFreeContext()
225{
226    int size = contextIds.size();
227    ThreadContext *tc;
228    for (int i = 0; i < size; ++i) {
229        tc = system->getThreadContext(contextIds[i]);
230        if (tc->status() == ThreadContext::Halted) {
231            // inactive context, free to use
232            return tc;
233        }
234    }
235    return NULL;
236}
237
238void
239Process::initState()
240{
241    if (contextIds.empty())
242        fatal("Process %s is not associated with any HW contexts!\n", name());
243
244    // first thread context for this process... initialize & enable
245    ThreadContext *tc = system->getThreadContext(contextIds[0]);
246
247    // mark this context as active so it will start ticking.
248    tc->activate(Cycles(0));
249}
250
251// map simulator fd sim_fd to target fd tgt_fd
252void
253Process::dup_fd(int sim_fd, int tgt_fd)
254{
255    if (tgt_fd < 0 || tgt_fd > MAX_FD)
256        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
257
258    Process::FdMap *fdo = &fd_map[tgt_fd];
259    fdo->fd = sim_fd;
260}
261
262
263// generate new target fd for sim_fd
264int
265Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
266{
267    // in case open() returns an error, don't allocate a new fd
268    if (sim_fd == -1)
269        return -1;
270
271    // find first free target fd
272    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
273        Process::FdMap *fdo = &fd_map[free_fd];
274        if (fdo->fd == -1) {
275            fdo->fd = sim_fd;
276            fdo->filename = filename;
277            fdo->mode = mode;
278            fdo->fileOffset = 0;
279            fdo->flags = flags;
280            fdo->isPipe = pipe;
281            fdo->readPipeSource = 0;
282            return free_fd;
283        }
284    }
285
286    panic("Process::alloc_fd: out of file descriptors!");
287}
288
289
290// free target fd (e.g., after close)
291void
292Process::free_fd(int tgt_fd)
293{
294    Process::FdMap *fdo = &fd_map[tgt_fd];
295    if (fdo->fd == -1)
296        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
297
298    fdo->fd = -1;
299    fdo->filename = "NULL";
300    fdo->mode = 0;
301    fdo->fileOffset = 0;
302    fdo->flags = 0;
303    fdo->isPipe = false;
304    fdo->readPipeSource = 0;
305}
306
307
308// look up simulator fd for given target fd
309int
310Process::sim_fd(int tgt_fd)
311{
312    if (tgt_fd < 0 || tgt_fd > MAX_FD)
313        return -1;
314
315    return fd_map[tgt_fd].fd;
316}
317
318Process::FdMap *
319Process::sim_fd_obj(int tgt_fd)
320{
321    if (tgt_fd < 0 || tgt_fd > MAX_FD)
322        return NULL;
323
324    return &fd_map[tgt_fd];
325}
326
327void
328Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
329{
330    int npages = divCeil(size, (int64_t)VMPageSize);
331    Addr paddr = system->allocPhysPages(npages);
332    pTable->map(vaddr, paddr, size, clobber);
333}
334
335bool
336Process::fixupStackFault(Addr vaddr)
337{
338    // Check if this is already on the stack and there's just no page there
339    // yet.
340    if (vaddr >= stack_min && vaddr < stack_base) {
341        allocateMem(roundDown(vaddr, VMPageSize), VMPageSize);
342        return true;
343    }
344
345    // We've accessed the next page of the stack, so extend it to include
346    // this address.
347    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
348        while (vaddr < stack_min) {
349            stack_min -= TheISA::PageBytes;
350            if (stack_base - stack_min > max_stack_size)
351                fatal("Maximum stack size exceeded\n");
352            allocateMem(stack_min, TheISA::PageBytes);
353            inform("Increasing stack size by one page.");
354        };
355        return true;
356    }
357    return false;
358}
359
360// find all offsets for currently open files and save them
361void
362Process::fix_file_offsets()
363{
364    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
365    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
366    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
367    string in = fdo_stdin->filename;
368    string out = fdo_stdout->filename;
369    string err = fdo_stderr->filename;
370
371    // initialize file descriptors to default: same as simulator
372    int stdin_fd, stdout_fd, stderr_fd;
373
374    if (in == "stdin" || in == "cin")
375        stdin_fd = STDIN_FILENO;
376    else if (in == "None")
377        stdin_fd = -1;
378    else {
379        // open standard in and seek to the right location
380        stdin_fd = Process::openInputFile(in);
381        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
382            panic("Unable to seek to correct location in file: %s", in);
383    }
384
385    if (out == "stdout" || out == "cout")
386        stdout_fd = STDOUT_FILENO;
387    else if (out == "stderr" || out == "cerr")
388        stdout_fd = STDERR_FILENO;
389    else if (out == "None")
390        stdout_fd = -1;
391    else {
392        stdout_fd = Process::openOutputFile(out);
393        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
394            panic("Unable to seek to correct location in file: %s", out);
395    }
396
397    if (err == "stdout" || err == "cout")
398        stderr_fd = STDOUT_FILENO;
399    else if (err == "stderr" || err == "cerr")
400        stderr_fd = STDERR_FILENO;
401    else if (err == "None")
402        stderr_fd = -1;
403    else if (err == out)
404        stderr_fd = stdout_fd;
405    else {
406        stderr_fd = Process::openOutputFile(err);
407        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
408            panic("Unable to seek to correct location in file: %s", err);
409    }
410
411    fdo_stdin->fd = stdin_fd;
412    fdo_stdout->fd = stdout_fd;
413    fdo_stderr->fd = stderr_fd;
414
415
416    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
417        Process::FdMap *fdo = &fd_map[free_fd];
418        if (fdo->fd != -1) {
419            if (fdo->isPipe){
420                if (fdo->filename == "PIPE-WRITE")
421                    continue;
422                else {
423                    assert (fdo->filename == "PIPE-READ");
424                    //create a new pipe
425                    int fds[2];
426                    int pipe_retval = pipe(fds);
427
428                    if (pipe_retval < 0) {
429                        // error
430                        panic("Unable to create new pipe.");
431                    }
432                    fdo->fd = fds[0]; //set read pipe
433                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
434                    if (fdo_write->filename != "PIPE-WRITE")
435                        panic ("Couldn't find write end of the pipe");
436
437                    fdo_write->fd = fds[1];//set write pipe
438               }
439            } else {
440                //Open file
441                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
442
443                if (fd == -1)
444                    panic("Unable to open file: %s", fdo->filename);
445                fdo->fd = fd;
446
447                //Seek to correct location before checkpoint
448                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
449                    panic("Unable to seek to correct location in file: %s",
450                          fdo->filename);
451            }
452        }
453    }
454}
455
456void
457Process::find_file_offsets()
458{
459    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
460        Process::FdMap *fdo = &fd_map[free_fd];
461        if (fdo->fd != -1) {
462            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
463        } else {
464                fdo->filename = "NULL";
465                fdo->fileOffset = 0;
466        }
467    }
468}
469
470void
471Process::setReadPipeSource(int read_pipe_fd, int source_fd)
472{
473    Process::FdMap *fdo = &fd_map[read_pipe_fd];
474    fdo->readPipeSource = source_fd;
475}
476
477void
478Process::FdMap::serialize(std::ostream &os)
479{
480    SERIALIZE_SCALAR(fd);
481    SERIALIZE_SCALAR(isPipe);
482    SERIALIZE_SCALAR(filename);
483    SERIALIZE_SCALAR(flags);
484    SERIALIZE_SCALAR(readPipeSource);
485    SERIALIZE_SCALAR(fileOffset);
486}
487
488void
489Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
490{
491    UNSERIALIZE_SCALAR(fd);
492    UNSERIALIZE_SCALAR(isPipe);
493    UNSERIALIZE_SCALAR(filename);
494    UNSERIALIZE_SCALAR(flags);
495    UNSERIALIZE_SCALAR(readPipeSource);
496    UNSERIALIZE_SCALAR(fileOffset);
497}
498
499void
500Process::serialize(std::ostream &os)
501{
502    SERIALIZE_SCALAR(brk_point);
503    SERIALIZE_SCALAR(stack_base);
504    SERIALIZE_SCALAR(stack_size);
505    SERIALIZE_SCALAR(stack_min);
506    SERIALIZE_SCALAR(next_thread_stack_base);
507    SERIALIZE_SCALAR(mmap_start);
508    SERIALIZE_SCALAR(mmap_end);
509    SERIALIZE_SCALAR(nxm_start);
510    SERIALIZE_SCALAR(nxm_end);
511    find_file_offsets();
512    pTable->serialize(os);
513    for (int x = 0; x <= MAX_FD; x++) {
514        nameOut(os, csprintf("%s.FdMap%d", name(), x));
515        fd_map[x].serialize(os);
516    }
517    SERIALIZE_SCALAR(M5_pid);
518
519}
520
521void
522Process::unserialize(Checkpoint *cp, const std::string &section)
523{
524    UNSERIALIZE_SCALAR(brk_point);
525    UNSERIALIZE_SCALAR(stack_base);
526    UNSERIALIZE_SCALAR(stack_size);
527    UNSERIALIZE_SCALAR(stack_min);
528    UNSERIALIZE_SCALAR(next_thread_stack_base);
529    UNSERIALIZE_SCALAR(mmap_start);
530    UNSERIALIZE_SCALAR(mmap_end);
531    UNSERIALIZE_SCALAR(nxm_start);
532    UNSERIALIZE_SCALAR(nxm_end);
533    pTable->unserialize(cp, section);
534    for (int x = 0; x <= MAX_FD; x++) {
535        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
536    }
537    fix_file_offsets();
538    UNSERIALIZE_OPT_SCALAR(M5_pid);
539    // The above returns a bool so that you could do something if you don't
540    // find the param in the checkpoint if you wanted to, like set a default
541    // but in this case we'll just stick with the instantianted value if not
542    // found.
543}
544
545
546bool
547Process::map(Addr vaddr, Addr paddr, int size)
548{
549    pTable->map(vaddr, paddr, size);
550    return true;
551}
552
553
554////////////////////////////////////////////////////////////////////////
555//
556// LiveProcess member definitions
557//
558////////////////////////////////////////////////////////////////////////
559
560
561LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
562    : Process(params), objFile(_objFile),
563      argv(params->cmd), envp(params->env), cwd(params->cwd)
564{
565    __uid = params->uid;
566    __euid = params->euid;
567    __gid = params->gid;
568    __egid = params->egid;
569    __pid = params->pid;
570    __ppid = params->ppid;
571
572    // load up symbols, if any... these may be used for debugging or
573    // profiling.
574    if (!debugSymbolTable) {
575        debugSymbolTable = new SymbolTable();
576        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
577            !objFile->loadLocalSymbols(debugSymbolTable) ||
578            !objFile->loadWeakSymbols(debugSymbolTable)) {
579            // didn't load any symbols
580            delete debugSymbolTable;
581            debugSymbolTable = NULL;
582        }
583    }
584}
585
586void
587LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
588{
589    num_syscalls++;
590
591    SyscallDesc *desc = getDesc(callnum);
592    if (desc == NULL)
593        fatal("Syscall %d out of range", callnum);
594
595    desc->doSyscall(callnum, this, tc);
596}
597
598IntReg
599LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
600{
601    return getSyscallArg(tc, i);
602}
603
604LiveProcess *
605LiveProcess::create(LiveProcessParams * params)
606{
607    LiveProcess *process = NULL;
608
609    string executable =
610        params->executable == "" ? params->cmd[0] : params->executable;
611    ObjectFile *objFile = createObjectFile(executable);
612    if (objFile == NULL) {
613        fatal("Can't load object file %s", executable);
614    }
615
616    if (objFile->isDynamic())
617       fatal("Object file is a dynamic executable however only static "
618             "executables are supported!\n       Please recompile your "
619             "executable as a static binary and try again.\n");
620
621#if THE_ISA == ALPHA_ISA
622    if (objFile->getArch() != ObjectFile::Alpha)
623        fatal("Object file architecture does not match compiled ISA (Alpha).");
624
625    switch (objFile->getOpSys()) {
626      case ObjectFile::Tru64:
627        process = new AlphaTru64Process(params, objFile);
628        break;
629
630      case ObjectFile::UnknownOpSys:
631        warn("Unknown operating system; assuming Linux.");
632        // fall through
633      case ObjectFile::Linux:
634        process = new AlphaLinuxProcess(params, objFile);
635        break;
636
637      default:
638        fatal("Unknown/unsupported operating system.");
639    }
640#elif THE_ISA == SPARC_ISA
641    if (objFile->getArch() != ObjectFile::SPARC64 &&
642        objFile->getArch() != ObjectFile::SPARC32)
643        fatal("Object file architecture does not match compiled ISA (SPARC).");
644    switch (objFile->getOpSys()) {
645      case ObjectFile::UnknownOpSys:
646        warn("Unknown operating system; assuming Linux.");
647        // fall through
648      case ObjectFile::Linux:
649        if (objFile->getArch() == ObjectFile::SPARC64) {
650            process = new Sparc64LinuxProcess(params, objFile);
651        } else {
652            process = new Sparc32LinuxProcess(params, objFile);
653        }
654        break;
655
656
657      case ObjectFile::Solaris:
658        process = new SparcSolarisProcess(params, objFile);
659        break;
660
661      default:
662        fatal("Unknown/unsupported operating system.");
663    }
664#elif THE_ISA == X86_ISA
665    if (objFile->getArch() != ObjectFile::X86_64 &&
666        objFile->getArch() != ObjectFile::I386)
667        fatal("Object file architecture does not match compiled ISA (x86).");
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::X86_64) {
674            process = new X86_64LinuxProcess(params, objFile);
675        } else {
676            process = new I386LinuxProcess(params, objFile);
677        }
678        break;
679
680      default:
681        fatal("Unknown/unsupported operating system.");
682    }
683#elif THE_ISA == MIPS_ISA
684    if (objFile->getArch() != ObjectFile::Mips)
685        fatal("Object file architecture does not match compiled ISA (MIPS).");
686    switch (objFile->getOpSys()) {
687      case ObjectFile::UnknownOpSys:
688        warn("Unknown operating system; assuming Linux.");
689        // fall through
690      case ObjectFile::Linux:
691        process = new MipsLinuxProcess(params, objFile);
692        break;
693
694      default:
695        fatal("Unknown/unsupported operating system.");
696    }
697#elif THE_ISA == ARM_ISA
698    ObjectFile::Arch arch = objFile->getArch();
699    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
700        arch != ObjectFile::Arm64)
701        fatal("Object file architecture does not match compiled ISA (ARM).");
702    switch (objFile->getOpSys()) {
703      case ObjectFile::UnknownOpSys:
704        warn("Unknown operating system; assuming Linux.");
705        // fall through
706      case ObjectFile::Linux:
707        if (arch == ObjectFile::Arm64) {
708            process = new ArmLinuxProcess64(params, objFile,
709                                            objFile->getArch());
710        } else {
711            process = new ArmLinuxProcess32(params, objFile,
712                                            objFile->getArch());
713        }
714        break;
715      case ObjectFile::LinuxArmOABI:
716        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
717              " EABI compiler.");
718      default:
719        fatal("Unknown/unsupported operating system.");
720    }
721#elif THE_ISA == POWER_ISA
722    if (objFile->getArch() != ObjectFile::Power)
723        fatal("Object file architecture does not match compiled ISA (Power).");
724    switch (objFile->getOpSys()) {
725      case ObjectFile::UnknownOpSys:
726        warn("Unknown operating system; assuming Linux.");
727        // fall through
728      case ObjectFile::Linux:
729        process = new PowerLinuxProcess(params, objFile);
730        break;
731
732      default:
733        fatal("Unknown/unsupported operating system.");
734    }
735#else
736#error "THE_ISA not set"
737#endif
738
739    if (process == NULL)
740        fatal("Unknown error creating process object.");
741    return process;
742}
743
744LiveProcess *
745LiveProcessParams::create()
746{
747    return LiveProcess::create(this);
748}
749