process.cc revision 10810:683ab55819fd 
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{
120    string in = params->input;
121    string out = params->output;
122    string err = params->errout;
123
124    // initialize file descriptors to default: same as simulator
125    int stdin_fd, stdout_fd, stderr_fd;
126
127    if (in == "stdin" || in == "cin")
128        stdin_fd = STDIN_FILENO;
129    else if (in == "None")
130        stdin_fd = -1;
131    else
132        stdin_fd = Process::openInputFile(in);
133
134    if (out == "stdout" || out == "cout")
135        stdout_fd = STDOUT_FILENO;
136    else if (out == "stderr" || out == "cerr")
137        stdout_fd = STDERR_FILENO;
138    else if (out == "None")
139        stdout_fd = -1;
140    else
141        stdout_fd = Process::openOutputFile(out);
142
143    if (err == "stdout" || err == "cout")
144        stderr_fd = STDOUT_FILENO;
145    else if (err == "stderr" || err == "cerr")
146        stderr_fd = STDERR_FILENO;
147    else if (err == "None")
148        stderr_fd = -1;
149    else if (err == out)
150        stderr_fd = stdout_fd;
151    else
152        stderr_fd = Process::openOutputFile(err);
153
154    // initialize first 3 fds (stdin, stdout, stderr)
155    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
156    fdo->fd = stdin_fd;
157    fdo->filename = in;
158    fdo->flags = O_RDONLY;
159    fdo->mode = -1;
160    fdo->fileOffset = 0;
161
162    fdo =  &fd_map[STDOUT_FILENO];
163    fdo->fd = stdout_fd;
164    fdo->filename = out;
165    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
166    fdo->mode = 0774;
167    fdo->fileOffset = 0;
168
169    fdo = &fd_map[STDERR_FILENO];
170    fdo->fd = stderr_fd;
171    fdo->filename = err;
172    fdo->flags = O_WRONLY;
173    fdo->mode = -1;
174    fdo->fileOffset = 0;
175
176
177    // mark remaining fds as free
178    for (int i = 3; i <= MAX_FD; ++i) {
179        fdo = &fd_map[i];
180        fdo->fd = -1;
181    }
182
183    mmap_start = mmap_end = 0;
184    nxm_start = nxm_end = 0;
185    // other parameters will be initialized when the program is loaded
186}
187
188
189void
190Process::regStats()
191{
192    using namespace Stats;
193
194    num_syscalls
195        .name(name() + ".num_syscalls")
196        .desc("Number of system calls")
197        ;
198}
199
200//
201// static helper functions
202//
203int
204Process::openInputFile(const string &filename)
205{
206    int fd = open(filename.c_str(), O_RDONLY);
207
208    if (fd == -1) {
209        perror(NULL);
210        cerr << "unable to open \"" << filename << "\" for reading\n";
211        fatal("can't open input file");
212    }
213
214    return fd;
215}
216
217
218int
219Process::openOutputFile(const string &filename)
220{
221    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
222
223    if (fd == -1) {
224        perror(NULL);
225        cerr << "unable to open \"" << filename << "\" for writing\n";
226        fatal("can't open output file");
227    }
228
229    return fd;
230}
231
232ThreadContext *
233Process::findFreeContext()
234{
235    int size = contextIds.size();
236    ThreadContext *tc;
237    for (int i = 0; i < size; ++i) {
238        tc = system->getThreadContext(contextIds[i]);
239        if (tc->status() == ThreadContext::Halted) {
240            // inactive context, free to use
241            return tc;
242        }
243    }
244    return NULL;
245}
246
247void
248Process::initState()
249{
250    if (contextIds.empty())
251        fatal("Process %s is not associated with any HW contexts!\n", name());
252
253    // first thread context for this process... initialize & enable
254    ThreadContext *tc = system->getThreadContext(contextIds[0]);
255
256    // mark this context as active so it will start ticking.
257    tc->activate();
258
259    pTable->initState(tc);
260}
261
262// map simulator fd sim_fd to target fd tgt_fd
263void
264Process::dup_fd(int sim_fd, int tgt_fd)
265{
266    if (tgt_fd < 0 || tgt_fd > MAX_FD)
267        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
268
269    Process::FdMap *fdo = &fd_map[tgt_fd];
270    fdo->fd = sim_fd;
271}
272
273
274// generate new target fd for sim_fd
275int
276Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
277                  bool pipe)
278{
279    // in case open() returns an error, don't allocate a new fd
280    if (sim_fd == -1)
281        return -1;
282
283    // find first free target fd
284    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
285        Process::FdMap *fdo = &fd_map[free_fd];
286        if (fdo->fd == -1 && fdo->driver == NULL) {
287            fdo->fd = sim_fd;
288            fdo->filename = filename;
289            fdo->mode = mode;
290            fdo->fileOffset = 0;
291            fdo->flags = flags;
292            fdo->isPipe = pipe;
293            fdo->readPipeSource = 0;
294            return free_fd;
295        }
296    }
297
298    panic("Process::alloc_fd: out of file descriptors!");
299}
300
301
302// free target fd (e.g., after close)
303void
304Process::free_fd(int tgt_fd)
305{
306    Process::FdMap *fdo = &fd_map[tgt_fd];
307    if (fdo->fd == -1)
308        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
309
310    fdo->fd = -1;
311    fdo->filename = "NULL";
312    fdo->mode = 0;
313    fdo->fileOffset = 0;
314    fdo->flags = 0;
315    fdo->isPipe = false;
316    fdo->readPipeSource = 0;
317    fdo->driver = NULL;
318}
319
320
321// look up simulator fd for given target fd
322int
323Process::sim_fd(int tgt_fd)
324{
325    if (tgt_fd < 0 || tgt_fd > MAX_FD)
326        return -1;
327
328    return fd_map[tgt_fd].fd;
329}
330
331Process::FdMap *
332Process::sim_fd_obj(int tgt_fd)
333{
334    if (tgt_fd < 0 || tgt_fd > MAX_FD)
335        return NULL;
336
337    return &fd_map[tgt_fd];
338}
339
340void
341Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
342{
343    int npages = divCeil(size, (int64_t)PageBytes);
344    Addr paddr = system->allocPhysPages(npages);
345    pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
346}
347
348bool
349Process::fixupStackFault(Addr vaddr)
350{
351    // Check if this is already on the stack and there's just no page there
352    // yet.
353    if (vaddr >= stack_min && vaddr < stack_base) {
354        allocateMem(roundDown(vaddr, PageBytes), PageBytes);
355        return true;
356    }
357
358    // We've accessed the next page of the stack, so extend it to include
359    // this address.
360    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
361        while (vaddr < stack_min) {
362            stack_min -= TheISA::PageBytes;
363            if (stack_base - stack_min > max_stack_size)
364                fatal("Maximum stack size exceeded\n");
365            allocateMem(stack_min, TheISA::PageBytes);
366            inform("Increasing stack size by one page.");
367        };
368        return true;
369    }
370    return false;
371}
372
373// find all offsets for currently open files and save them
374void
375Process::fix_file_offsets()
376{
377    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
378    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
379    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
380    string in = fdo_stdin->filename;
381    string out = fdo_stdout->filename;
382    string err = fdo_stderr->filename;
383
384    // initialize file descriptors to default: same as simulator
385    int stdin_fd, stdout_fd, stderr_fd;
386
387    if (in == "stdin" || in == "cin")
388        stdin_fd = STDIN_FILENO;
389    else if (in == "NULL")
390        stdin_fd = -1;
391    else {
392        // open standard in and seek to the right location
393        stdin_fd = Process::openInputFile(in);
394        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
395            panic("Unable to seek to correct location in file: %s", in);
396    }
397
398    if (out == "stdout" || out == "cout")
399        stdout_fd = STDOUT_FILENO;
400    else if (out == "stderr" || out == "cerr")
401        stdout_fd = STDERR_FILENO;
402    else if (out == "NULL")
403        stdout_fd = -1;
404    else {
405        stdout_fd = Process::openOutputFile(out);
406        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
407            panic("Unable to seek to correct location in file: %s", out);
408    }
409
410    if (err == "stdout" || err == "cout")
411        stderr_fd = STDOUT_FILENO;
412    else if (err == "stderr" || err == "cerr")
413        stderr_fd = STDERR_FILENO;
414    else if (err == "NULL")
415        stderr_fd = -1;
416    else if (err == out)
417        stderr_fd = stdout_fd;
418    else {
419        stderr_fd = Process::openOutputFile(err);
420        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
421            panic("Unable to seek to correct location in file: %s", err);
422    }
423
424    fdo_stdin->fd = stdin_fd;
425    fdo_stdout->fd = stdout_fd;
426    fdo_stderr->fd = stderr_fd;
427
428
429    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
430        Process::FdMap *fdo = &fd_map[free_fd];
431        if (fdo->fd != -1) {
432            if (fdo->isPipe){
433                if (fdo->filename == "PIPE-WRITE")
434                    continue;
435                else {
436                    assert (fdo->filename == "PIPE-READ");
437                    //create a new pipe
438                    int fds[2];
439                    int pipe_retval = pipe(fds);
440
441                    if (pipe_retval < 0) {
442                        // error
443                        panic("Unable to create new pipe.");
444                    }
445                    fdo->fd = fds[0]; //set read pipe
446                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
447                    if (fdo_write->filename != "PIPE-WRITE")
448                        panic ("Couldn't find write end of the pipe");
449
450                    fdo_write->fd = fds[1];//set write pipe
451               }
452            } else {
453                //Open file
454                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
455
456                if (fd == -1)
457                    panic("Unable to open file: %s", fdo->filename);
458                fdo->fd = fd;
459
460                //Seek to correct location before checkpoint
461                if (lseek(fd, fdo->fileOffset, SEEK_SET) < 0)
462                    panic("Unable to seek to correct location in file: %s",
463                          fdo->filename);
464            }
465        }
466    }
467}
468
469void
470Process::find_file_offsets()
471{
472    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
473        Process::FdMap *fdo = &fd_map[free_fd];
474        if (fdo->fd != -1) {
475            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
476        } else {
477            fdo->filename = "NULL";
478            fdo->fileOffset = 0;
479        }
480    }
481}
482
483void
484Process::setReadPipeSource(int read_pipe_fd, int source_fd)
485{
486    Process::FdMap *fdo = &fd_map[read_pipe_fd];
487    fdo->readPipeSource = source_fd;
488}
489
490void
491Process::FdMap::serialize(std::ostream &os)
492{
493    SERIALIZE_SCALAR(fd);
494    SERIALIZE_SCALAR(isPipe);
495    SERIALIZE_SCALAR(filename);
496    SERIALIZE_SCALAR(flags);
497    SERIALIZE_SCALAR(readPipeSource);
498    SERIALIZE_SCALAR(fileOffset);
499}
500
501void
502Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
503{
504    UNSERIALIZE_SCALAR(fd);
505    UNSERIALIZE_SCALAR(isPipe);
506    UNSERIALIZE_SCALAR(filename);
507    UNSERIALIZE_SCALAR(flags);
508    UNSERIALIZE_SCALAR(readPipeSource);
509    UNSERIALIZE_SCALAR(fileOffset);
510}
511
512void
513Process::serialize(std::ostream &os)
514{
515    SERIALIZE_SCALAR(brk_point);
516    SERIALIZE_SCALAR(stack_base);
517    SERIALIZE_SCALAR(stack_size);
518    SERIALIZE_SCALAR(stack_min);
519    SERIALIZE_SCALAR(next_thread_stack_base);
520    SERIALIZE_SCALAR(mmap_start);
521    SERIALIZE_SCALAR(mmap_end);
522    SERIALIZE_SCALAR(nxm_start);
523    SERIALIZE_SCALAR(nxm_end);
524    find_file_offsets();
525    pTable->serialize(os);
526    for (int x = 0; x <= MAX_FD; x++) {
527        nameOut(os, csprintf("%s.FdMap%d", name(), x));
528        fd_map[x].serialize(os);
529    }
530    SERIALIZE_SCALAR(M5_pid);
531
532}
533
534void
535Process::unserialize(Checkpoint *cp, const std::string &section)
536{
537    UNSERIALIZE_SCALAR(brk_point);
538    UNSERIALIZE_SCALAR(stack_base);
539    UNSERIALIZE_SCALAR(stack_size);
540    UNSERIALIZE_SCALAR(stack_min);
541    UNSERIALIZE_SCALAR(next_thread_stack_base);
542    UNSERIALIZE_SCALAR(mmap_start);
543    UNSERIALIZE_SCALAR(mmap_end);
544    UNSERIALIZE_SCALAR(nxm_start);
545    UNSERIALIZE_SCALAR(nxm_end);
546    pTable->unserialize(cp, section);
547    for (int x = 0; x <= MAX_FD; x++) {
548        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
549    }
550    fix_file_offsets();
551    UNSERIALIZE_OPT_SCALAR(M5_pid);
552    // The above returns a bool so that you could do something if you don't
553    // find the param in the checkpoint if you wanted to, like set a default
554    // but in this case we'll just stick with the instantianted value if not
555    // found.
556}
557
558
559bool
560Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
561{
562    pTable->map(vaddr, paddr, size,
563                cacheable ? 0 : PageTableBase::Uncacheable);
564    return true;
565}
566
567
568////////////////////////////////////////////////////////////////////////
569//
570// LiveProcess member definitions
571//
572////////////////////////////////////////////////////////////////////////
573
574
575LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
576    : Process(params), objFile(_objFile),
577      argv(params->cmd), envp(params->env), cwd(params->cwd),
578      __uid(params->uid), __euid(params->euid),
579      __gid(params->gid), __egid(params->egid),
580      __pid(params->pid), __ppid(params->ppid),
581      drivers(params->drivers)
582{
583
584    // load up symbols, if any... these may be used for debugging or
585    // profiling.
586    if (!debugSymbolTable) {
587        debugSymbolTable = new SymbolTable();
588        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
589            !objFile->loadLocalSymbols(debugSymbolTable) ||
590            !objFile->loadWeakSymbols(debugSymbolTable)) {
591            // didn't load any symbols
592            delete debugSymbolTable;
593            debugSymbolTable = NULL;
594        }
595    }
596}
597
598void
599LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
600{
601    num_syscalls++;
602
603    SyscallDesc *desc = getDesc(callnum);
604    if (desc == NULL)
605        fatal("Syscall %d out of range", callnum);
606
607    desc->doSyscall(callnum, this, tc);
608}
609
610IntReg
611LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
612{
613    return getSyscallArg(tc, i);
614}
615
616
617EmulatedDriver *
618LiveProcess::findDriver(std::string filename)
619{
620    for (EmulatedDriver *d : drivers) {
621        if (d->match(filename))
622            return d;
623    }
624
625    return NULL;
626}
627
628
629LiveProcess *
630LiveProcess::create(LiveProcessParams * params)
631{
632    LiveProcess *process = NULL;
633
634    string executable =
635        params->executable == "" ? params->cmd[0] : params->executable;
636    ObjectFile *objFile = createObjectFile(executable);
637    if (objFile == NULL) {
638        fatal("Can't load object file %s", executable);
639    }
640
641    if (objFile->isDynamic())
642       fatal("Object file is a dynamic executable however only static "
643             "executables are supported!\n       Please recompile your "
644             "executable as a static binary and try again.\n");
645
646#if THE_ISA == ALPHA_ISA
647    if (objFile->getArch() != ObjectFile::Alpha)
648        fatal("Object file architecture does not match compiled ISA (Alpha).");
649
650    switch (objFile->getOpSys()) {
651      case ObjectFile::Tru64:
652        process = new AlphaTru64Process(params, objFile);
653        break;
654
655      case ObjectFile::UnknownOpSys:
656        warn("Unknown operating system; assuming Linux.");
657        // fall through
658      case ObjectFile::Linux:
659        process = new AlphaLinuxProcess(params, objFile);
660        break;
661
662      default:
663        fatal("Unknown/unsupported operating system.");
664    }
665#elif THE_ISA == SPARC_ISA
666    if (objFile->getArch() != ObjectFile::SPARC64 &&
667        objFile->getArch() != ObjectFile::SPARC32)
668        fatal("Object file architecture does not match compiled ISA (SPARC).");
669    switch (objFile->getOpSys()) {
670      case ObjectFile::UnknownOpSys:
671        warn("Unknown operating system; assuming Linux.");
672        // fall through
673      case ObjectFile::Linux:
674        if (objFile->getArch() == ObjectFile::SPARC64) {
675            process = new Sparc64LinuxProcess(params, objFile);
676        } else {
677            process = new Sparc32LinuxProcess(params, objFile);
678        }
679        break;
680
681
682      case ObjectFile::Solaris:
683        process = new SparcSolarisProcess(params, objFile);
684        break;
685
686      default:
687        fatal("Unknown/unsupported operating system.");
688    }
689#elif THE_ISA == X86_ISA
690    if (objFile->getArch() != ObjectFile::X86_64 &&
691        objFile->getArch() != ObjectFile::I386)
692        fatal("Object file architecture does not match compiled ISA (x86).");
693    switch (objFile->getOpSys()) {
694      case ObjectFile::UnknownOpSys:
695        warn("Unknown operating system; assuming Linux.");
696        // fall through
697      case ObjectFile::Linux:
698        if (objFile->getArch() == ObjectFile::X86_64) {
699            process = new X86_64LinuxProcess(params, objFile);
700        } else {
701            process = new I386LinuxProcess(params, objFile);
702        }
703        break;
704
705      default:
706        fatal("Unknown/unsupported operating system.");
707    }
708#elif THE_ISA == MIPS_ISA
709    if (objFile->getArch() != ObjectFile::Mips)
710        fatal("Object file architecture does not match compiled ISA (MIPS).");
711    switch (objFile->getOpSys()) {
712      case ObjectFile::UnknownOpSys:
713        warn("Unknown operating system; assuming Linux.");
714        // fall through
715      case ObjectFile::Linux:
716        process = new MipsLinuxProcess(params, objFile);
717        break;
718
719      default:
720        fatal("Unknown/unsupported operating system.");
721    }
722#elif THE_ISA == ARM_ISA
723    ObjectFile::Arch arch = objFile->getArch();
724    if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb &&
725        arch != ObjectFile::Arm64)
726        fatal("Object file architecture does not match compiled ISA (ARM).");
727    switch (objFile->getOpSys()) {
728      case ObjectFile::UnknownOpSys:
729        warn("Unknown operating system; assuming Linux.");
730        // fall through
731      case ObjectFile::Linux:
732        if (arch == ObjectFile::Arm64) {
733            process = new ArmLinuxProcess64(params, objFile,
734                                            objFile->getArch());
735        } else {
736            process = new ArmLinuxProcess32(params, objFile,
737                                            objFile->getArch());
738        }
739        break;
740      case ObjectFile::FreeBSD:
741        if (arch == ObjectFile::Arm64) {
742            process = new ArmFreebsdProcess64(params, objFile,
743                                              objFile->getArch());
744        } else {
745            process = new ArmFreebsdProcess32(params, objFile,
746                                              objFile->getArch());
747        }
748        break;
749      case ObjectFile::LinuxArmOABI:
750        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
751              " EABI compiler.");
752      default:
753        fatal("Unknown/unsupported operating system.");
754    }
755#elif THE_ISA == POWER_ISA
756    if (objFile->getArch() != ObjectFile::Power)
757        fatal("Object file architecture does not match compiled ISA (Power).");
758    switch (objFile->getOpSys()) {
759      case ObjectFile::UnknownOpSys:
760        warn("Unknown operating system; assuming Linux.");
761        // fall through
762      case ObjectFile::Linux:
763        process = new PowerLinuxProcess(params, objFile);
764        break;
765
766      default:
767        fatal("Unknown/unsupported operating system.");
768    }
769#else
770#error "THE_ISA not set"
771#endif
772
773    if (process == NULL)
774        fatal("Unknown error creating process object.");
775    return process;
776}
777
778LiveProcess *
779LiveProcessParams::create()
780{
781    return LiveProcess::create(this);
782}
783