process.cc revision 10298:77af86f37337 
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      pTable(new FuncPageTable(name(), M5_pid)),
110      initVirtMem(system->getSystemPort(), this,
111                  SETranslatingPortProxy::Always)
112{
113    string in = params->input;
114    string out = params->output;
115    string err = params->errout;
116
117    // initialize file descriptors to default: same as simulator
118    int stdin_fd, stdout_fd, stderr_fd;
119
120    if (in == "stdin" || in == "cin")
121        stdin_fd = STDIN_FILENO;
122    else if (in == "None")
123        stdin_fd = -1;
124    else
125        stdin_fd = Process::openInputFile(in);
126
127    if (out == "stdout" || out == "cout")
128        stdout_fd = STDOUT_FILENO;
129    else if (out == "stderr" || out == "cerr")
130        stdout_fd = STDERR_FILENO;
131    else if (out == "None")
132        stdout_fd = -1;
133    else
134        stdout_fd = Process::openOutputFile(out);
135
136    if (err == "stdout" || err == "cout")
137        stderr_fd = STDOUT_FILENO;
138    else if (err == "stderr" || err == "cerr")
139        stderr_fd = STDERR_FILENO;
140    else if (err == "None")
141        stderr_fd = -1;
142    else if (err == out)
143        stderr_fd = stdout_fd;
144    else
145        stderr_fd = Process::openOutputFile(err);
146
147    // initialize first 3 fds (stdin, stdout, stderr)
148    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
149    fdo->fd = stdin_fd;
150    fdo->filename = in;
151    fdo->flags = O_RDONLY;
152    fdo->mode = -1;
153    fdo->fileOffset = 0;
154
155    fdo =  &fd_map[STDOUT_FILENO];
156    fdo->fd = stdout_fd;
157    fdo->filename = out;
158    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
159    fdo->mode = 0774;
160    fdo->fileOffset = 0;
161
162    fdo = &fd_map[STDERR_FILENO];
163    fdo->fd = stderr_fd;
164    fdo->filename = err;
165    fdo->flags = O_WRONLY;
166    fdo->mode = -1;
167    fdo->fileOffset = 0;
168
169
170    // mark remaining fds as free
171    for (int i = 3; i <= MAX_FD; ++i) {
172        fdo = &fd_map[i];
173        fdo->fd = -1;
174    }
175
176    mmap_start = mmap_end = 0;
177    nxm_start = nxm_end = 0;
178    // other parameters will be initialized when the program is loaded
179}
180
181
182void
183Process::regStats()
184{
185    using namespace Stats;
186
187    num_syscalls
188        .name(name() + ".num_syscalls")
189        .desc("Number of system calls")
190        ;
191}
192
193//
194// static helper functions
195//
196int
197Process::openInputFile(const string &filename)
198{
199    int fd = open(filename.c_str(), O_RDONLY);
200
201    if (fd == -1) {
202        perror(NULL);
203        cerr << "unable to open \"" << filename << "\" for reading\n";
204        fatal("can't open input file");
205    }
206
207    return fd;
208}
209
210
211int
212Process::openOutputFile(const string &filename)
213{
214    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
215
216    if (fd == -1) {
217        perror(NULL);
218        cerr << "unable to open \"" << filename << "\" for writing\n";
219        fatal("can't open output file");
220    }
221
222    return fd;
223}
224
225ThreadContext *
226Process::findFreeContext()
227{
228    int size = contextIds.size();
229    ThreadContext *tc;
230    for (int i = 0; i < size; ++i) {
231        tc = system->getThreadContext(contextIds[i]);
232        if (tc->status() == ThreadContext::Halted) {
233            // inactive context, free to use
234            return tc;
235        }
236    }
237    return NULL;
238}
239
240void
241Process::initState()
242{
243    if (contextIds.empty())
244        fatal("Process %s is not associated with any HW contexts!\n", name());
245
246    // first thread context for this process... initialize & enable
247    ThreadContext *tc = system->getThreadContext(contextIds[0]);
248
249    // mark this context as active so it will start ticking.
250    tc->activate(Cycles(0));
251
252    pTable->initState(tc);
253}
254
255// map simulator fd sim_fd to target fd tgt_fd
256void
257Process::dup_fd(int sim_fd, int tgt_fd)
258{
259    if (tgt_fd < 0 || tgt_fd > MAX_FD)
260        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
261
262    Process::FdMap *fdo = &fd_map[tgt_fd];
263    fdo->fd = sim_fd;
264}
265
266
267// generate new target fd for sim_fd
268int
269Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
270{
271    // in case open() returns an error, don't allocate a new fd
272    if (sim_fd == -1)
273        return -1;
274
275    // find first free target fd
276    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
277        Process::FdMap *fdo = &fd_map[free_fd];
278        if (fdo->fd == -1) {
279            fdo->fd = sim_fd;
280            fdo->filename = filename;
281            fdo->mode = mode;
282            fdo->fileOffset = 0;
283            fdo->flags = flags;
284            fdo->isPipe = pipe;
285            fdo->readPipeSource = 0;
286            return free_fd;
287        }
288    }
289
290    panic("Process::alloc_fd: out of file descriptors!");
291}
292
293
294// free target fd (e.g., after close)
295void
296Process::free_fd(int tgt_fd)
297{
298    Process::FdMap *fdo = &fd_map[tgt_fd];
299    if (fdo->fd == -1)
300        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
301
302    fdo->fd = -1;
303    fdo->filename = "NULL";
304    fdo->mode = 0;
305    fdo->fileOffset = 0;
306    fdo->flags = 0;
307    fdo->isPipe = false;
308    fdo->readPipeSource = 0;
309}
310
311
312// look up simulator fd for given target fd
313int
314Process::sim_fd(int tgt_fd)
315{
316    if (tgt_fd < 0 || tgt_fd > MAX_FD)
317        return -1;
318
319    return fd_map[tgt_fd].fd;
320}
321
322Process::FdMap *
323Process::sim_fd_obj(int tgt_fd)
324{
325    if (tgt_fd < 0 || tgt_fd > MAX_FD)
326        return NULL;
327
328    return &fd_map[tgt_fd];
329}
330
331void
332Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
333{
334    int npages = divCeil(size, (int64_t)VMPageSize);
335    Addr paddr = system->allocPhysPages(npages);
336    pTable->map(vaddr, paddr, size, clobber);
337}
338
339bool
340Process::fixupStackFault(Addr vaddr)
341{
342    // Check if this is already on the stack and there's just no page there
343    // yet.
344    if (vaddr >= stack_min && vaddr < stack_base) {
345        allocateMem(roundDown(vaddr, VMPageSize), VMPageSize);
346        return true;
347    }
348
349    // We've accessed the next page of the stack, so extend it to include
350    // this address.
351    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
352        while (vaddr < stack_min) {
353            stack_min -= TheISA::PageBytes;
354            if (stack_base - stack_min > max_stack_size)
355                fatal("Maximum stack size exceeded\n");
356            allocateMem(stack_min, TheISA::PageBytes);
357            inform("Increasing stack size by one page.");
358        };
359        return true;
360    }
361    return false;
362}
363
364// find all offsets for currently open files and save them
365void
366Process::fix_file_offsets()
367{
368    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
369    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
370    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
371    string in = fdo_stdin->filename;
372    string out = fdo_stdout->filename;
373    string err = fdo_stderr->filename;
374
375    // initialize file descriptors to default: same as simulator
376    int stdin_fd, stdout_fd, stderr_fd;
377
378    if (in == "stdin" || in == "cin")
379        stdin_fd = STDIN_FILENO;
380    else if (in == "None")
381        stdin_fd = -1;
382    else {
383        // open standard in and seek to the right location
384        stdin_fd = Process::openInputFile(in);
385        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
386            panic("Unable to seek to correct location in file: %s", in);
387    }
388
389    if (out == "stdout" || out == "cout")
390        stdout_fd = STDOUT_FILENO;
391    else if (out == "stderr" || out == "cerr")
392        stdout_fd = STDERR_FILENO;
393    else if (out == "None")
394        stdout_fd = -1;
395    else {
396        stdout_fd = Process::openOutputFile(out);
397        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
398            panic("Unable to seek to correct location in file: %s", out);
399    }
400
401    if (err == "stdout" || err == "cout")
402        stderr_fd = STDOUT_FILENO;
403    else if (err == "stderr" || err == "cerr")
404        stderr_fd = STDERR_FILENO;
405    else if (err == "None")
406        stderr_fd = -1;
407    else if (err == out)
408        stderr_fd = stdout_fd;
409    else {
410        stderr_fd = Process::openOutputFile(err);
411        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
412            panic("Unable to seek to correct location in file: %s", err);
413    }
414
415    fdo_stdin->fd = stdin_fd;
416    fdo_stdout->fd = stdout_fd;
417    fdo_stderr->fd = stderr_fd;
418
419
420    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
421        Process::FdMap *fdo = &fd_map[free_fd];
422        if (fdo->fd != -1) {
423            if (fdo->isPipe){
424                if (fdo->filename == "PIPE-WRITE")
425                    continue;
426                else {
427                    assert (fdo->filename == "PIPE-READ");
428                    //create a new pipe
429                    int fds[2];
430                    int pipe_retval = pipe(fds);
431
432                    if (pipe_retval < 0) {
433                        // error
434                        panic("Unable to create new pipe.");
435                    }
436                    fdo->fd = fds[0]; //set read pipe
437                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
438                    if (fdo_write->filename != "PIPE-WRITE")
439                        panic ("Couldn't find write end of the pipe");
440
441                    fdo_write->fd = fds[1];//set write pipe
442               }
443            } else {
444                //Open file
445                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
446
447                if (fd == -1)
448                    panic("Unable to open file: %s", fdo->filename);
449                fdo->fd = fd;
450
451                //Seek to correct location before checkpoint
452                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
453                    panic("Unable to seek to correct location in file: %s",
454                          fdo->filename);
455            }
456        }
457    }
458}
459
460void
461Process::find_file_offsets()
462{
463    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
464        Process::FdMap *fdo = &fd_map[free_fd];
465        if (fdo->fd != -1) {
466            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
467        } else {
468                fdo->filename = "NULL";
469                fdo->fileOffset = 0;
470        }
471    }
472}
473
474void
475Process::setReadPipeSource(int read_pipe_fd, int source_fd)
476{
477    Process::FdMap *fdo = &fd_map[read_pipe_fd];
478    fdo->readPipeSource = source_fd;
479}
480
481void
482Process::FdMap::serialize(std::ostream &os)
483{
484    SERIALIZE_SCALAR(fd);
485    SERIALIZE_SCALAR(isPipe);
486    SERIALIZE_SCALAR(filename);
487    SERIALIZE_SCALAR(flags);
488    SERIALIZE_SCALAR(readPipeSource);
489    SERIALIZE_SCALAR(fileOffset);
490}
491
492void
493Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
494{
495    UNSERIALIZE_SCALAR(fd);
496    UNSERIALIZE_SCALAR(isPipe);
497    UNSERIALIZE_SCALAR(filename);
498    UNSERIALIZE_SCALAR(flags);
499    UNSERIALIZE_SCALAR(readPipeSource);
500    UNSERIALIZE_SCALAR(fileOffset);
501}
502
503void
504Process::serialize(std::ostream &os)
505{
506    SERIALIZE_SCALAR(brk_point);
507    SERIALIZE_SCALAR(stack_base);
508    SERIALIZE_SCALAR(stack_size);
509    SERIALIZE_SCALAR(stack_min);
510    SERIALIZE_SCALAR(next_thread_stack_base);
511    SERIALIZE_SCALAR(mmap_start);
512    SERIALIZE_SCALAR(mmap_end);
513    SERIALIZE_SCALAR(nxm_start);
514    SERIALIZE_SCALAR(nxm_end);
515    find_file_offsets();
516    pTable->serialize(os);
517    for (int x = 0; x <= MAX_FD; x++) {
518        nameOut(os, csprintf("%s.FdMap%d", name(), x));
519        fd_map[x].serialize(os);
520    }
521    SERIALIZE_SCALAR(M5_pid);
522
523}
524
525void
526Process::unserialize(Checkpoint *cp, const std::string &section)
527{
528    UNSERIALIZE_SCALAR(brk_point);
529    UNSERIALIZE_SCALAR(stack_base);
530    UNSERIALIZE_SCALAR(stack_size);
531    UNSERIALIZE_SCALAR(stack_min);
532    UNSERIALIZE_SCALAR(next_thread_stack_base);
533    UNSERIALIZE_SCALAR(mmap_start);
534    UNSERIALIZE_SCALAR(mmap_end);
535    UNSERIALIZE_SCALAR(nxm_start);
536    UNSERIALIZE_SCALAR(nxm_end);
537    pTable->unserialize(cp, section);
538    for (int x = 0; x <= MAX_FD; x++) {
539        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
540    }
541    fix_file_offsets();
542    UNSERIALIZE_OPT_SCALAR(M5_pid);
543    // The above returns a bool so that you could do something if you don't
544    // find the param in the checkpoint if you wanted to, like set a default
545    // but in this case we'll just stick with the instantianted value if not
546    // found.
547}
548
549
550bool
551Process::map(Addr vaddr, Addr paddr, int size)
552{
553    pTable->map(vaddr, paddr, size);
554    return true;
555}
556
557
558////////////////////////////////////////////////////////////////////////
559//
560// LiveProcess member definitions
561//
562////////////////////////////////////////////////////////////////////////
563
564
565LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
566    : Process(params), objFile(_objFile),
567      argv(params->cmd), envp(params->env), cwd(params->cwd)
568{
569    __uid = params->uid;
570    __euid = params->euid;
571    __gid = params->gid;
572    __egid = params->egid;
573    __pid = params->pid;
574    __ppid = params->ppid;
575
576    // load up symbols, if any... these may be used for debugging or
577    // profiling.
578    if (!debugSymbolTable) {
579        debugSymbolTable = new SymbolTable();
580        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
581            !objFile->loadLocalSymbols(debugSymbolTable) ||
582            !objFile->loadWeakSymbols(debugSymbolTable)) {
583            // didn't load any symbols
584            delete debugSymbolTable;
585            debugSymbolTable = NULL;
586        }
587    }
588}
589
590void
591LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
592{
593    num_syscalls++;
594
595    SyscallDesc *desc = getDesc(callnum);
596    if (desc == NULL)
597        fatal("Syscall %d out of range", callnum);
598
599    desc->doSyscall(callnum, this, tc);
600}
601
602IntReg
603LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
604{
605    return getSyscallArg(tc, i);
606}
607
608LiveProcess *
609LiveProcess::create(LiveProcessParams * params)
610{
611    LiveProcess *process = NULL;
612
613    string executable =
614        params->executable == "" ? params->cmd[0] : params->executable;
615    ObjectFile *objFile = createObjectFile(executable);
616    if (objFile == NULL) {
617        fatal("Can't load object file %s", executable);
618    }
619
620    if (objFile->isDynamic())
621       fatal("Object file is a dynamic executable however only static "
622             "executables are supported!\n       Please recompile your "
623             "executable as a static binary and try again.\n");
624
625#if THE_ISA == ALPHA_ISA
626    if (objFile->getArch() != ObjectFile::Alpha)
627        fatal("Object file architecture does not match compiled ISA (Alpha).");
628
629    switch (objFile->getOpSys()) {
630      case ObjectFile::Tru64:
631        process = new AlphaTru64Process(params, objFile);
632        break;
633
634      case ObjectFile::UnknownOpSys:
635        warn("Unknown operating system; assuming Linux.");
636        // fall through
637      case ObjectFile::Linux:
638        process = new AlphaLinuxProcess(params, objFile);
639        break;
640
641      default:
642        fatal("Unknown/unsupported operating system.");
643    }
644#elif THE_ISA == SPARC_ISA
645    if (objFile->getArch() != ObjectFile::SPARC64 &&
646        objFile->getArch() != ObjectFile::SPARC32)
647        fatal("Object file architecture does not match compiled ISA (SPARC).");
648    switch (objFile->getOpSys()) {
649      case ObjectFile::UnknownOpSys:
650        warn("Unknown operating system; assuming Linux.");
651        // fall through
652      case ObjectFile::Linux:
653        if (objFile->getArch() == ObjectFile::SPARC64) {
654            process = new Sparc64LinuxProcess(params, objFile);
655        } else {
656            process = new Sparc32LinuxProcess(params, objFile);
657        }
658        break;
659
660
661      case ObjectFile::Solaris:
662        process = new SparcSolarisProcess(params, objFile);
663        break;
664
665      default:
666        fatal("Unknown/unsupported operating system.");
667    }
668#elif THE_ISA == X86_ISA
669    if (objFile->getArch() != ObjectFile::X86_64 &&
670        objFile->getArch() != ObjectFile::I386)
671        fatal("Object file architecture does not match compiled ISA (x86).");
672    switch (objFile->getOpSys()) {
673      case ObjectFile::UnknownOpSys:
674        warn("Unknown operating system; assuming Linux.");
675        // fall through
676      case ObjectFile::Linux:
677        if (objFile->getArch() == ObjectFile::X86_64) {
678            process = new X86_64LinuxProcess(params, objFile);
679        } else {
680            process = new I386LinuxProcess(params, objFile);
681        }
682        break;
683
684      default:
685        fatal("Unknown/unsupported operating system.");
686    }
687#elif THE_ISA == MIPS_ISA
688    if (objFile->getArch() != ObjectFile::Mips)
689        fatal("Object file architecture does not match compiled ISA (MIPS).");
690    switch (objFile->getOpSys()) {
691      case ObjectFile::UnknownOpSys:
692        warn("Unknown operating system; assuming Linux.");
693        // fall through
694      case ObjectFile::Linux:
695        process = new MipsLinuxProcess(params, objFile);
696        break;
697
698      default:
699        fatal("Unknown/unsupported operating system.");
700    }
701#elif THE_ISA == ARM_ISA
702    ObjectFile::Arch arch = objFile->getArch();
703    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
704        arch != ObjectFile::Arm64)
705        fatal("Object file architecture does not match compiled ISA (ARM).");
706    switch (objFile->getOpSys()) {
707      case ObjectFile::UnknownOpSys:
708        warn("Unknown operating system; assuming Linux.");
709        // fall through
710      case ObjectFile::Linux:
711        if (arch == ObjectFile::Arm64) {
712            process = new ArmLinuxProcess64(params, objFile,
713                                            objFile->getArch());
714        } else {
715            process = new ArmLinuxProcess32(params, objFile,
716                                            objFile->getArch());
717        }
718        break;
719      case ObjectFile::LinuxArmOABI:
720        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
721              " EABI compiler.");
722      default:
723        fatal("Unknown/unsupported operating system.");
724    }
725#elif THE_ISA == POWER_ISA
726    if (objFile->getArch() != ObjectFile::Power)
727        fatal("Object file architecture does not match compiled ISA (Power).");
728    switch (objFile->getOpSys()) {
729      case ObjectFile::UnknownOpSys:
730        warn("Unknown operating system; assuming Linux.");
731        // fall through
732      case ObjectFile::Linux:
733        process = new PowerLinuxProcess(params, objFile);
734        break;
735
736      default:
737        fatal("Unknown/unsupported operating system.");
738    }
739#else
740#error "THE_ISA not set"
741#endif
742
743    if (process == NULL)
744        fatal("Unknown error creating process object.");
745    return process;
746}
747
748LiveProcess *
749LiveProcessParams::create()
750{
751    return LiveProcess::create(this);
752}
753