process.cc revision 10929 
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#include "arch/arm/freebsd/process.hh"
81#elif THE_ISA == X86_ISA
82#include "arch/x86/linux/process.hh"
83#elif THE_ISA == POWER_ISA
84#include "arch/power/linux/process.hh"
85#else
86#error "THE_ISA not set"
87#endif
88
89
90using namespace std;
91using namespace TheISA;
92
93// current number of allocated processes
94int num_processes = 0;
95
96template<class IntType>
97AuxVector<IntType>::AuxVector(IntType type, IntType val)
98{
99    a_type = TheISA::htog(type);
100    a_val = TheISA::htog(val);
101}
102
103template struct AuxVector<uint32_t>;
104template struct AuxVector<uint64_t>;
105
106Process::Process(ProcessParams * params)
107    : SimObject(params), system(params->system),
108      brk_point(0), stack_base(0), stack_size(0), stack_min(0),
109      max_stack_size(params->max_stack_size),
110      next_thread_stack_base(0),
111      M5_pid(system->allocatePID()),
112      useArchPT(params->useArchPT),
113      kvmInSE(params->kvmInSE),
114      pTable(useArchPT ?
115        static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
116        static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
117      initVirtMem(system->getSystemPort(), this,
118                  SETranslatingPortProxy::Always),
119      fd_map(new FdMap[NUM_FDS])
120{
121    string in = params->input;
122    string out = params->output;
123    string err = params->errout;
124
125    // initialize file descriptors to default: same as simulator
126    int stdin_fd, stdout_fd, stderr_fd;
127
128    if (in == "stdin" || in == "cin")
129        stdin_fd = STDIN_FILENO;
130    else if (in == "None")
131        stdin_fd = -1;
132    else
133        stdin_fd = Process::openInputFile(in);
134
135    if (out == "stdout" || out == "cout")
136        stdout_fd = STDOUT_FILENO;
137    else if (out == "stderr" || out == "cerr")
138        stdout_fd = STDERR_FILENO;
139    else if (out == "None")
140        stdout_fd = -1;
141    else
142        stdout_fd = Process::openOutputFile(out);
143
144    if (err == "stdout" || err == "cout")
145        stderr_fd = STDOUT_FILENO;
146    else if (err == "stderr" || err == "cerr")
147        stderr_fd = STDERR_FILENO;
148    else if (err == "None")
149        stderr_fd = -1;
150    else if (err == out)
151        stderr_fd = stdout_fd;
152    else
153        stderr_fd = Process::openOutputFile(err);
154
155    // initialize first 3 fds (stdin, stdout, stderr)
156    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
157    fdo->fd = stdin_fd;
158    fdo->filename = in;
159    fdo->flags = O_RDONLY;
160    fdo->mode = -1;
161    fdo->fileOffset = 0;
162
163    fdo =  &fd_map[STDOUT_FILENO];
164    fdo->fd = stdout_fd;
165    fdo->filename = out;
166    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
167    fdo->mode = 0774;
168    fdo->fileOffset = 0;
169
170    fdo = &fd_map[STDERR_FILENO];
171    fdo->fd = stderr_fd;
172    fdo->filename = err;
173    fdo->flags = O_WRONLY;
174    fdo->mode = -1;
175    fdo->fileOffset = 0;
176
177
178    // mark remaining fds as free
179    for (int i = 3; i < NUM_FDS; ++i) {
180        fdo = &fd_map[i];
181        fdo->fd = -1;
182    }
183
184    mmap_start = mmap_end = 0;
185    nxm_start = nxm_end = 0;
186    // other parameters will be initialized when the program is loaded
187}
188
189
190void
191Process::regStats()
192{
193    using namespace Stats;
194
195    num_syscalls
196        .name(name() + ".num_syscalls")
197        .desc("Number of system calls")
198        ;
199}
200
201//
202// static helper functions
203//
204
205int
206Process::openInputFile(const string &filename)
207{
208    int fd = open(filename.c_str(), O_RDONLY);
209
210    if (fd == -1) {
211        perror(NULL);
212        cerr << "unable to open \"" << filename << "\" for reading\n";
213        fatal("can't open input file");
214    }
215
216    return fd;
217}
218
219
220int
221Process::openOutputFile(const string &filename)
222{
223    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
224
225    if (fd == -1) {
226        perror(NULL);
227        cerr << "unable to open \"" << filename << "\" for writing\n";
228        fatal("can't open output file");
229    }
230
231    return fd;
232}
233
234ThreadContext *
235Process::findFreeContext()
236{
237    for (int id : contextIds) {
238        ThreadContext *tc = system->getThreadContext(id);
239        if (tc->status() == ThreadContext::Halted)
240            return tc;
241    }
242    return NULL;
243}
244
245void
246Process::initState()
247{
248    if (contextIds.empty())
249        fatal("Process %s is not associated with any HW contexts!\n", name());
250
251    // first thread context for this process... initialize & enable
252    ThreadContext *tc = system->getThreadContext(contextIds[0]);
253
254    // mark this context as active so it will start ticking.
255    tc->activate();
256
257    pTable->initState(tc);
258}
259
260DrainState
261Process::drain()
262{
263    find_file_offsets();
264    return DrainState::Drained;
265}
266
267int
268Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
269                  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 < NUM_FDS; ++free_fd) {
277        Process::FdMap *fdo = &fd_map[free_fd];
278        if (fdo->fd == -1 && fdo->driver == NULL) {
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
293void
294Process::free_fdmap_entry(int tgt_fd)
295{
296    Process::FdMap *fdo = &fd_map[tgt_fd];
297    assert(fd_map[tgt_fd].fd > -1);
298
299    fdo->fd = -1;
300    fdo->filename = "NULL";
301    fdo->mode = 0;
302    fdo->fileOffset = 0;
303    fdo->flags = 0;
304    fdo->isPipe = false;
305    fdo->readPipeSource = 0;
306    fdo->driver = NULL;
307}
308
309int
310Process::sim_fd(int tgt_fd)
311{
312    FdMap *obj = sim_fd_obj(tgt_fd);
313    return obj ? obj->fd : -1;
314}
315
316Process::FdMap *
317Process::sim_fd_obj(int tgt_fd)
318{
319    if (tgt_fd < 0 || tgt_fd >= NUM_FDS)
320        return NULL;
321    return &fd_map[tgt_fd];
322}
323
324int
325Process::tgt_fd(int sim_fd)
326{
327    for (int index = 0; index < NUM_FDS; ++index)
328        if (fd_map[index].fd == sim_fd)
329            return index;
330    return -1;
331}
332
333void
334Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
335{
336    int npages = divCeil(size, (int64_t)PageBytes);
337    Addr paddr = system->allocPhysPages(npages);
338    pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
339}
340
341bool
342Process::fixupStackFault(Addr vaddr)
343{
344    // Check if this is already on the stack and there's just no page there
345    // yet.
346    if (vaddr >= stack_min && vaddr < stack_base) {
347        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
348        return true;
349    }
350
351    // We've accessed the next page of the stack, so extend it to include
352    // this address.
353    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
354        while (vaddr < stack_min) {
355            stack_min -= TheISA::PageBytes;
356            if (stack_base - stack_min > max_stack_size)
357                fatal("Maximum stack size exceeded\n");
358            allocateMem(stack_min, TheISA::PageBytes);
359            inform("Increasing stack size by one page.");
360        };
361        return true;
362    }
363    return false;
364}
365
366// find all offsets for currently open files and save them
367void
368Process::fix_file_offsets()
369{
370    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
371    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
372    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
373    string in = fdo_stdin->filename;
374    string out = fdo_stdout->filename;
375    string err = fdo_stderr->filename;
376
377    // initialize file descriptors to default: same as simulator
378    int stdin_fd, stdout_fd, stderr_fd;
379
380    if (in == "stdin" || in == "cin")
381        stdin_fd = STDIN_FILENO;
382    else if (in == "NULL")
383        stdin_fd = -1;
384    else {
385        // open standard in and seek to the right location
386        stdin_fd = Process::openInputFile(in);
387        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
388            panic("Unable to seek to correct location in file: %s", in);
389    }
390
391    if (out == "stdout" || out == "cout")
392        stdout_fd = STDOUT_FILENO;
393    else if (out == "stderr" || out == "cerr")
394        stdout_fd = STDERR_FILENO;
395    else if (out == "NULL")
396        stdout_fd = -1;
397    else {
398        stdout_fd = Process::openOutputFile(out);
399        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
400            panic("Unable to seek to correct location in file: %s", out);
401    }
402
403    if (err == "stdout" || err == "cout")
404        stderr_fd = STDOUT_FILENO;
405    else if (err == "stderr" || err == "cerr")
406        stderr_fd = STDERR_FILENO;
407    else if (err == "NULL")
408        stderr_fd = -1;
409    else if (err == out)
410        stderr_fd = stdout_fd;
411    else {
412        stderr_fd = Process::openOutputFile(err);
413        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
414            panic("Unable to seek to correct location in file: %s", err);
415    }
416
417    fdo_stdin->fd = stdin_fd;
418    fdo_stdout->fd = stdout_fd;
419    fdo_stderr->fd = stderr_fd;
420
421
422    for (int free_fd = 3; free_fd < NUM_FDS; ++free_fd) {
423        Process::FdMap *fdo = &fd_map[free_fd];
424        if (fdo->fd != -1) {
425            if (fdo->isPipe){
426                if (fdo->filename == "PIPE-WRITE")
427                    continue;
428                else {
429                    assert (fdo->filename == "PIPE-READ");
430                    //create a new pipe
431                    int fds[2];
432                    int pipe_retval = pipe(fds);
433
434                    if (pipe_retval < 0) {
435                        // error
436                        panic("Unable to create new pipe.");
437                    }
438                    fdo->fd = fds[0]; //set read pipe
439                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
440                    if (fdo_write->filename != "PIPE-WRITE")
441                        panic ("Couldn't find write end of the pipe");
442
443                    fdo_write->fd = fds[1];//set write pipe
444               }
445            } else {
446                //Open file
447                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
448
449                if (fd == -1)
450                    panic("Unable to open file: %s", fdo->filename);
451                fdo->fd = fd;
452
453                //Seek to correct location before checkpoint
454                if (lseek(fd, fdo->fileOffset, SEEK_SET) < 0)
455                    panic("Unable to seek to correct location in file: %s",
456                          fdo->filename);
457            }
458        }
459    }
460}
461
462void
463Process::find_file_offsets()
464{
465    for (int free_fd = 0; free_fd < NUM_FDS; ++free_fd) {
466        Process::FdMap *fdo = &fd_map[free_fd];
467        if (fdo->fd != -1) {
468            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
469        } else {
470            fdo->filename = "NULL";
471            fdo->fileOffset = 0;
472        }
473    }
474}
475
476void
477Process::setReadPipeSource(int read_pipe_fd, int source_fd)
478{
479    Process::FdMap *fdo = &fd_map[read_pipe_fd];
480    fdo->readPipeSource = source_fd;
481}
482
483void
484Process::FdMap::serialize(CheckpointOut &cp) const
485{
486    SERIALIZE_SCALAR(fd);
487    SERIALIZE_SCALAR(isPipe);
488    SERIALIZE_SCALAR(filename);
489    SERIALIZE_SCALAR(flags);
490    SERIALIZE_SCALAR(readPipeSource);
491    SERIALIZE_SCALAR(fileOffset);
492}
493
494void
495Process::FdMap::unserialize(CheckpointIn &cp)
496{
497    UNSERIALIZE_SCALAR(fd);
498    UNSERIALIZE_SCALAR(isPipe);
499    UNSERIALIZE_SCALAR(filename);
500    UNSERIALIZE_SCALAR(flags);
501    UNSERIALIZE_SCALAR(readPipeSource);
502    UNSERIALIZE_SCALAR(fileOffset);
503}
504
505void
506Process::serialize(CheckpointOut &cp) const
507{
508    SERIALIZE_SCALAR(brk_point);
509    SERIALIZE_SCALAR(stack_base);
510    SERIALIZE_SCALAR(stack_size);
511    SERIALIZE_SCALAR(stack_min);
512    SERIALIZE_SCALAR(next_thread_stack_base);
513    SERIALIZE_SCALAR(mmap_start);
514    SERIALIZE_SCALAR(mmap_end);
515    SERIALIZE_SCALAR(nxm_start);
516    SERIALIZE_SCALAR(nxm_end);
517    pTable->serialize(cp);
518    for (int x = 0; x < NUM_FDS; x++) {
519        fd_map[x].serializeSection(cp, csprintf("FdMap%d", x));
520    }
521    SERIALIZE_SCALAR(M5_pid);
522
523}
524
525void
526Process::unserialize(CheckpointIn &cp)
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);
538    for (int x = 0; x < NUM_FDS; x++) {
539        fd_map[x].unserializeSection(cp, csprintf("FdMap%d", 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, bool cacheable)
552{
553    pTable->map(vaddr, paddr, size,
554                cacheable ? 0 : PageTableBase::Uncacheable);
555    return true;
556}
557
558
559////////////////////////////////////////////////////////////////////////
560//
561// LiveProcess member definitions
562//
563////////////////////////////////////////////////////////////////////////
564
565
566LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
567    : Process(params), objFile(_objFile),
568      argv(params->cmd), envp(params->env), cwd(params->cwd),
569      __uid(params->uid), __euid(params->euid),
570      __gid(params->gid), __egid(params->egid),
571      __pid(params->pid), __ppid(params->ppid),
572      drivers(params->drivers)
573{
574
575    // load up symbols, if any... these may be used for debugging or
576    // profiling.
577    if (!debugSymbolTable) {
578        debugSymbolTable = new SymbolTable();
579        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
580            !objFile->loadLocalSymbols(debugSymbolTable) ||
581            !objFile->loadWeakSymbols(debugSymbolTable)) {
582            // didn't load any symbols
583            delete debugSymbolTable;
584            debugSymbolTable = NULL;
585        }
586    }
587}
588
589void
590LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
591{
592    num_syscalls++;
593
594    SyscallDesc *desc = getDesc(callnum);
595    if (desc == NULL)
596        fatal("Syscall %d out of range", callnum);
597
598    desc->doSyscall(callnum, this, tc);
599}
600
601IntReg
602LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
603{
604    return getSyscallArg(tc, i);
605}
606
607
608EmulatedDriver *
609LiveProcess::findDriver(std::string filename)
610{
611    for (EmulatedDriver *d : drivers) {
612        if (d->match(filename))
613            return d;
614    }
615
616    return NULL;
617}
618
619
620LiveProcess *
621LiveProcess::create(LiveProcessParams * params)
622{
623    LiveProcess *process = NULL;
624
625    string executable =
626        params->executable == "" ? params->cmd[0] : params->executable;
627    ObjectFile *objFile = createObjectFile(executable);
628    if (objFile == NULL) {
629        fatal("Can't load object file %s", executable);
630    }
631
632    if (objFile->isDynamic())
633       fatal("Object file is a dynamic executable however only static "
634             "executables are supported!\n       Please recompile your "
635             "executable as a static binary and try again.\n");
636
637#if THE_ISA == ALPHA_ISA
638    if (objFile->getArch() != ObjectFile::Alpha)
639        fatal("Object file architecture does not match compiled ISA (Alpha).");
640
641    switch (objFile->getOpSys()) {
642      case ObjectFile::Tru64:
643        process = new AlphaTru64Process(params, objFile);
644        break;
645
646      case ObjectFile::UnknownOpSys:
647        warn("Unknown operating system; assuming Linux.");
648        // fall through
649      case ObjectFile::Linux:
650        process = new AlphaLinuxProcess(params, objFile);
651        break;
652
653      default:
654        fatal("Unknown/unsupported operating system.");
655    }
656#elif THE_ISA == SPARC_ISA
657    if (objFile->getArch() != ObjectFile::SPARC64 &&
658        objFile->getArch() != ObjectFile::SPARC32)
659        fatal("Object file architecture does not match compiled ISA (SPARC).");
660    switch (objFile->getOpSys()) {
661      case ObjectFile::UnknownOpSys:
662        warn("Unknown operating system; assuming Linux.");
663        // fall through
664      case ObjectFile::Linux:
665        if (objFile->getArch() == ObjectFile::SPARC64) {
666            process = new Sparc64LinuxProcess(params, objFile);
667        } else {
668            process = new Sparc32LinuxProcess(params, objFile);
669        }
670        break;
671
672
673      case ObjectFile::Solaris:
674        process = new SparcSolarisProcess(params, objFile);
675        break;
676
677      default:
678        fatal("Unknown/unsupported operating system.");
679    }
680#elif THE_ISA == X86_ISA
681    if (objFile->getArch() != ObjectFile::X86_64 &&
682        objFile->getArch() != ObjectFile::I386)
683        fatal("Object file architecture does not match compiled ISA (x86).");
684    switch (objFile->getOpSys()) {
685      case ObjectFile::UnknownOpSys:
686        warn("Unknown operating system; assuming Linux.");
687        // fall through
688      case ObjectFile::Linux:
689        if (objFile->getArch() == ObjectFile::X86_64) {
690            process = new X86_64LinuxProcess(params, objFile);
691        } else {
692            process = new I386LinuxProcess(params, objFile);
693        }
694        break;
695
696      default:
697        fatal("Unknown/unsupported operating system.");
698    }
699#elif THE_ISA == MIPS_ISA
700    if (objFile->getArch() != ObjectFile::Mips)
701        fatal("Object file architecture does not match compiled ISA (MIPS).");
702    switch (objFile->getOpSys()) {
703      case ObjectFile::UnknownOpSys:
704        warn("Unknown operating system; assuming Linux.");
705        // fall through
706      case ObjectFile::Linux:
707        process = new MipsLinuxProcess(params, objFile);
708        break;
709
710      default:
711        fatal("Unknown/unsupported operating system.");
712    }
713#elif THE_ISA == ARM_ISA
714    ObjectFile::Arch arch = objFile->getArch();
715    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
716        arch != ObjectFile::Arm64)
717        fatal("Object file architecture does not match compiled ISA (ARM).");
718    switch (objFile->getOpSys()) {
719      case ObjectFile::UnknownOpSys:
720        warn("Unknown operating system; assuming Linux.");
721        // fall through
722      case ObjectFile::Linux:
723        if (arch == ObjectFile::Arm64) {
724            process = new ArmLinuxProcess64(params, objFile,
725                                            objFile->getArch());
726        } else {
727            process = new ArmLinuxProcess32(params, objFile,
728                                            objFile->getArch());
729        }
730        break;
731      case ObjectFile::FreeBSD:
732        if (arch == ObjectFile::Arm64) {
733            process = new ArmFreebsdProcess64(params, objFile,
734                                              objFile->getArch());
735        } else {
736            process = new ArmFreebsdProcess32(params, objFile,
737                                              objFile->getArch());
738        }
739        break;
740      case ObjectFile::LinuxArmOABI:
741        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
742              " EABI compiler.");
743      default:
744        fatal("Unknown/unsupported operating system.");
745    }
746#elif THE_ISA == POWER_ISA
747    if (objFile->getArch() != ObjectFile::Power)
748        fatal("Object file architecture does not match compiled ISA (Power).");
749    switch (objFile->getOpSys()) {
750      case ObjectFile::UnknownOpSys:
751        warn("Unknown operating system; assuming Linux.");
752        // fall through
753      case ObjectFile::Linux:
754        process = new PowerLinuxProcess(params, objFile);
755        break;
756
757      default:
758        fatal("Unknown/unsupported operating system.");
759    }
760#else
761#error "THE_ISA not set"
762#endif
763
764    if (process == NULL)
765        fatal("Unknown error creating process object.");
766    return process;
767}
768
769LiveProcess *
770LiveProcessParams::create()
771{
772    return LiveProcess::create(this);
773}
774