process.cc revision 8601:af28085882dc 
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 *          Ali Saidi
31 */
32
33#include <fcntl.h>
34#include <unistd.h>
35
36#include <cstdio>
37#include <string>
38
39#include "base/loader/object_file.hh"
40#include "base/loader/symtab.hh"
41#include "base/intmath.hh"
42#include "base/statistics.hh"
43#include "config/full_system.hh"
44#include "config/the_isa.hh"
45#include "cpu/thread_context.hh"
46#include "mem/page_table.hh"
47#include "mem/physical.hh"
48#include "mem/translating_port.hh"
49#include "params/LiveProcess.hh"
50#include "params/Process.hh"
51#include "sim/debug.hh"
52#include "sim/process.hh"
53#include "sim/process_impl.hh"
54#include "sim/stats.hh"
55#include "sim/syscall_emul.hh"
56#include "sim/system.hh"
57
58#if THE_ISA == ALPHA_ISA
59#include "arch/alpha/linux/process.hh"
60#include "arch/alpha/tru64/process.hh"
61#elif THE_ISA == SPARC_ISA
62#include "arch/sparc/linux/process.hh"
63#include "arch/sparc/solaris/process.hh"
64#elif THE_ISA == MIPS_ISA
65#include "arch/mips/linux/process.hh"
66#elif THE_ISA == ARM_ISA
67#include "arch/arm/linux/process.hh"
68#elif THE_ISA == X86_ISA
69#include "arch/x86/linux/process.hh"
70#elif THE_ISA == POWER_ISA
71#include "arch/power/linux/process.hh"
72#else
73#error "THE_ISA not set"
74#endif
75
76
77using namespace std;
78using namespace TheISA;
79
80//
81// The purpose of this code is to fake the loader & syscall mechanism
82// when there's no OS: thus there's no resone to use it in FULL_SYSTEM
83// mode when we do have an OS
84//
85#if FULL_SYSTEM
86#error "process.cc not compatible with FULL_SYSTEM"
87#endif
88
89// current number of allocated processes
90int num_processes = 0;
91
92template<class IntType>
93AuxVector<IntType>::AuxVector(IntType type, IntType val)
94{
95    a_type = TheISA::htog(type);
96    a_val = TheISA::htog(val);
97}
98
99template class AuxVector<uint32_t>;
100template class AuxVector<uint64_t>;
101
102Process::Process(ProcessParams * params)
103    : SimObject(params), system(params->system),
104      max_stack_size(params->max_stack_size)
105{
106    string in = params->input;
107    string out = params->output;
108    string err = params->errout;
109
110    // initialize file descriptors to default: same as simulator
111    int stdin_fd, stdout_fd, stderr_fd;
112
113    if (in == "stdin" || in == "cin")
114        stdin_fd = STDIN_FILENO;
115    else if (in == "None")
116        stdin_fd = -1;
117    else
118        stdin_fd = Process::openInputFile(in);
119
120    if (out == "stdout" || out == "cout")
121        stdout_fd = STDOUT_FILENO;
122    else if (out == "stderr" || out == "cerr")
123        stdout_fd = STDERR_FILENO;
124    else if (out == "None")
125        stdout_fd = -1;
126    else
127        stdout_fd = Process::openOutputFile(out);
128
129    if (err == "stdout" || err == "cout")
130        stderr_fd = STDOUT_FILENO;
131    else if (err == "stderr" || err == "cerr")
132        stderr_fd = STDERR_FILENO;
133    else if (err == "None")
134        stderr_fd = -1;
135    else if (err == out)
136        stderr_fd = stdout_fd;
137    else
138        stderr_fd = Process::openOutputFile(err);
139
140    M5_pid = system->allocatePID();
141    // initialize first 3 fds (stdin, stdout, stderr)
142    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
143    fdo->fd = stdin_fd;
144    fdo->filename = in;
145    fdo->flags = O_RDONLY;
146    fdo->mode = -1;
147    fdo->fileOffset = 0;
148
149    fdo =  &fd_map[STDOUT_FILENO];
150    fdo->fd = stdout_fd;
151    fdo->filename = out;
152    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
153    fdo->mode = 0774;
154    fdo->fileOffset = 0;
155
156    fdo = &fd_map[STDERR_FILENO];
157    fdo->fd = stderr_fd;
158    fdo->filename = err;
159    fdo->flags = O_WRONLY;
160    fdo->mode = -1;
161    fdo->fileOffset = 0;
162
163
164    // mark remaining fds as free
165    for (int i = 3; i <= MAX_FD; ++i) {
166        Process::FdMap *fdo = &fd_map[i];
167        fdo->fd = -1;
168    }
169
170    mmap_start = mmap_end = 0;
171    nxm_start = nxm_end = 0;
172    pTable = new PageTable(name(), M5_pid);
173    // other parameters will be initialized when the program is loaded
174}
175
176
177void
178Process::regStats()
179{
180    using namespace Stats;
181
182    num_syscalls
183        .name(name() + ".num_syscalls")
184        .desc("Number of system calls")
185        ;
186}
187
188//
189// static helper functions
190//
191int
192Process::openInputFile(const string &filename)
193{
194    int fd = open(filename.c_str(), O_RDONLY);
195
196    if (fd == -1) {
197        perror(NULL);
198        cerr << "unable to open \"" << filename << "\" for reading\n";
199        fatal("can't open input file");
200    }
201
202    return fd;
203}
204
205
206int
207Process::openOutputFile(const string &filename)
208{
209    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
210
211    if (fd == -1) {
212        perror(NULL);
213        cerr << "unable to open \"" << filename << "\" for writing\n";
214        fatal("can't open output file");
215    }
216
217    return fd;
218}
219
220ThreadContext *
221Process::findFreeContext()
222{
223    int size = contextIds.size();
224    ThreadContext *tc;
225    for (int i = 0; i < size; ++i) {
226        tc = system->getThreadContext(contextIds[i]);
227        if (tc->status() == ThreadContext::Halted) {
228            // inactive context, free to use
229            return tc;
230        }
231    }
232    return NULL;
233}
234
235void
236Process::initState()
237{
238    if (contextIds.empty())
239        fatal("Process %s is not associated with any HW contexts!\n", name());
240
241    // first thread context for this process... initialize & enable
242    ThreadContext *tc = system->getThreadContext(contextIds[0]);
243
244    // mark this context as active so it will start ticking.
245    tc->activate(0);
246
247    Port *mem_port;
248    mem_port = system->physmem->getPort("functional");
249    initVirtMem = new TranslatingPort("process init port", this,
250            TranslatingPort::Always);
251    mem_port->setPeer(initVirtMem);
252    initVirtMem->setPeer(mem_port);
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            if (stack_base - stack_min > 8 * 1024 * 1024)
357                fatal("Over max stack size for one thread\n");
358            allocateMem(stack_min, TheISA::PageBytes);
359            inform("Increasing stack size by one page.");
360        };
361        return true;
362    }
363    warn("Not extending stack: address %#x isn't at the end of the stack.",
364        vaddr);
365    return false;
366}
367
368// find all offsets for currently open files and save them
369void
370Process::fix_file_offsets()
371{
372    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
373    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
374    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
375    string in = fdo_stdin->filename;
376    string out = fdo_stdout->filename;
377    string err = fdo_stderr->filename;
378
379    // initialize file descriptors to default: same as simulator
380    int stdin_fd, stdout_fd, stderr_fd;
381
382    if (in == "stdin" || in == "cin")
383        stdin_fd = STDIN_FILENO;
384    else if (in == "None")
385        stdin_fd = -1;
386    else {
387        // open standard in and seek to the right location
388        stdin_fd = Process::openInputFile(in);
389        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
390            panic("Unable to seek to correct location in file: %s", in);
391    }
392
393    if (out == "stdout" || out == "cout")
394        stdout_fd = STDOUT_FILENO;
395    else if (out == "stderr" || out == "cerr")
396        stdout_fd = STDERR_FILENO;
397    else if (out == "None")
398        stdout_fd = -1;
399    else {
400        stdout_fd = Process::openOutputFile(out);
401        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
402            panic("Unable to seek to correct location in file: %s", out);
403    }
404
405    if (err == "stdout" || err == "cout")
406        stderr_fd = STDOUT_FILENO;
407    else if (err == "stderr" || err == "cerr")
408        stderr_fd = STDERR_FILENO;
409    else if (err == "None")
410        stderr_fd = -1;
411    else if (err == out)
412        stderr_fd = stdout_fd;
413    else {
414        stderr_fd = Process::openOutputFile(err);
415        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
416            panic("Unable to seek to correct location in file: %s", err);
417    }
418
419    fdo_stdin->fd = stdin_fd;
420    fdo_stdout->fd = stdout_fd;
421    fdo_stderr->fd = stderr_fd;
422
423
424    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
425        Process::FdMap *fdo = &fd_map[free_fd];
426        if (fdo->fd != -1) {
427            if (fdo->isPipe){
428                if (fdo->filename == "PIPE-WRITE")
429                    continue;
430                else {
431                    assert (fdo->filename == "PIPE-READ");
432                    //create a new pipe
433                    int fds[2];
434                    int pipe_retval = pipe(fds);
435
436                    if (pipe_retval < 0) {
437                        // error
438                        panic("Unable to create new pipe.");
439                    }
440                    fdo->fd = fds[0]; //set read pipe
441                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
442                    if (fdo_write->filename != "PIPE-WRITE")
443                        panic ("Couldn't find write end of the pipe");
444
445                    fdo_write->fd = fds[1];//set write pipe
446               }
447            } else {
448                //Open file
449                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
450
451                if (fd == -1)
452                    panic("Unable to open file: %s", fdo->filename);
453                fdo->fd = fd;
454
455                //Seek to correct location before checkpoint
456                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
457                    panic("Unable to seek to correct location in file: %s",
458                          fdo->filename);
459            }
460        }
461    }
462}
463
464void
465Process::find_file_offsets()
466{
467    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
468        Process::FdMap *fdo = &fd_map[free_fd];
469        if (fdo->fd != -1) {
470            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
471        } else {
472                fdo->filename = "NULL";
473                fdo->fileOffset = 0;
474        }
475    }
476}
477
478void
479Process::setReadPipeSource(int read_pipe_fd, int source_fd)
480{
481    Process::FdMap *fdo = &fd_map[read_pipe_fd];
482    fdo->readPipeSource = source_fd;
483}
484
485void
486Process::FdMap::serialize(std::ostream &os)
487{
488    SERIALIZE_SCALAR(fd);
489    SERIALIZE_SCALAR(isPipe);
490    SERIALIZE_SCALAR(filename);
491    SERIALIZE_SCALAR(flags);
492    SERIALIZE_SCALAR(readPipeSource);
493    SERIALIZE_SCALAR(fileOffset);
494}
495
496void
497Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
498{
499    UNSERIALIZE_SCALAR(fd);
500    UNSERIALIZE_SCALAR(isPipe);
501    UNSERIALIZE_SCALAR(filename);
502    UNSERIALIZE_SCALAR(flags);
503    UNSERIALIZE_SCALAR(readPipeSource);
504    UNSERIALIZE_SCALAR(fileOffset);
505}
506
507void
508Process::serialize(std::ostream &os)
509{
510    SERIALIZE_SCALAR(brk_point);
511    SERIALIZE_SCALAR(stack_base);
512    SERIALIZE_SCALAR(stack_size);
513    SERIALIZE_SCALAR(stack_min);
514    SERIALIZE_SCALAR(next_thread_stack_base);
515    SERIALIZE_SCALAR(mmap_start);
516    SERIALIZE_SCALAR(mmap_end);
517    SERIALIZE_SCALAR(nxm_start);
518    SERIALIZE_SCALAR(nxm_end);
519    find_file_offsets();
520    pTable->serialize(os);
521    for (int x = 0; x <= MAX_FD; x++) {
522        nameOut(os, csprintf("%s.FdMap%d", name(), x));
523        fd_map[x].serialize(os);
524    }
525    SERIALIZE_SCALAR(M5_pid);
526
527}
528
529void
530Process::unserialize(Checkpoint *cp, const std::string &section)
531{
532    UNSERIALIZE_SCALAR(brk_point);
533    UNSERIALIZE_SCALAR(stack_base);
534    UNSERIALIZE_SCALAR(stack_size);
535    UNSERIALIZE_SCALAR(stack_min);
536    UNSERIALIZE_SCALAR(next_thread_stack_base);
537    UNSERIALIZE_SCALAR(mmap_start);
538    UNSERIALIZE_SCALAR(mmap_end);
539    UNSERIALIZE_SCALAR(nxm_start);
540    UNSERIALIZE_SCALAR(nxm_end);
541    pTable->unserialize(cp, section);
542    for (int x = 0; x <= MAX_FD; x++) {
543        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
544    }
545    fix_file_offsets();
546    UNSERIALIZE_OPT_SCALAR(M5_pid);
547    // The above returns a bool so that you could do something if you don't
548    // find the param in the checkpoint if you wanted to, like set a default
549    // but in this case we'll just stick with the instantianted value if not
550    // found.
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    prog_fname = params->cmd[0];
573
574    // load up symbols, if any... these may be used for debugging or
575    // profiling.
576    if (!debugSymbolTable) {
577        debugSymbolTable = new SymbolTable();
578        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
579            !objFile->loadLocalSymbols(debugSymbolTable)) {
580            // didn't load any symbols
581            delete debugSymbolTable;
582            debugSymbolTable = NULL;
583        }
584    }
585}
586
587void
588LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
589{
590    num_syscalls++;
591
592    SyscallDesc *desc = getDesc(callnum);
593    if (desc == NULL)
594        fatal("Syscall %d out of range", callnum);
595
596    desc->doSyscall(callnum, this, tc);
597}
598
599IntReg
600LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
601{
602    return getSyscallArg(tc, i);
603}
604
605LiveProcess *
606LiveProcess::create(LiveProcessParams * params)
607{
608    LiveProcess *process = NULL;
609
610    string executable =
611        params->executable == "" ? params->cmd[0] : params->executable;
612    ObjectFile *objFile = createObjectFile(executable);
613    if (objFile == NULL) {
614        fatal("Can't load object file %s", executable);
615    }
616
617    if (objFile->isDynamic())
618       fatal("Object file is a dynamic executable however only static "
619             "executables are supported!\n       Please recompile your "
620             "executable as a static binary and try again.\n");
621
622#if THE_ISA == ALPHA_ISA
623    if (objFile->getArch() != ObjectFile::Alpha)
624        fatal("Object file architecture does not match compiled ISA (Alpha).");
625
626    switch (objFile->getOpSys()) {
627      case ObjectFile::Tru64:
628        process = new AlphaTru64Process(params, objFile);
629        break;
630
631      case ObjectFile::UnknownOpSys:
632        warn("Unknown operating system; assuming Linux.");
633        // fall through
634      case ObjectFile::Linux:
635        process = new AlphaLinuxProcess(params, objFile);
636        break;
637
638      default:
639        fatal("Unknown/unsupported operating system.");
640    }
641#elif THE_ISA == SPARC_ISA
642    if (objFile->getArch() != ObjectFile::SPARC64 &&
643        objFile->getArch() != ObjectFile::SPARC32)
644        fatal("Object file architecture does not match compiled ISA (SPARC).");
645    switch (objFile->getOpSys()) {
646      case ObjectFile::UnknownOpSys:
647        warn("Unknown operating system; assuming Linux.");
648        // fall through
649      case ObjectFile::Linux:
650        if (objFile->getArch() == ObjectFile::SPARC64) {
651            process = new Sparc64LinuxProcess(params, objFile);
652        } else {
653            process = new Sparc32LinuxProcess(params, objFile);
654        }
655        break;
656
657
658      case ObjectFile::Solaris:
659        process = new SparcSolarisProcess(params, objFile);
660        break;
661
662      default:
663        fatal("Unknown/unsupported operating system.");
664    }
665#elif THE_ISA == X86_ISA
666    if (objFile->getArch() != ObjectFile::X86_64 &&
667        objFile->getArch() != ObjectFile::I386)
668        fatal("Object file architecture does not match compiled ISA (x86).");
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::X86_64) {
675            process = new X86_64LinuxProcess(params, objFile);
676        } else {
677            process = new I386LinuxProcess(params, objFile);
678        }
679        break;
680
681      default:
682        fatal("Unknown/unsupported operating system.");
683    }
684#elif THE_ISA == MIPS_ISA
685    if (objFile->getArch() != ObjectFile::Mips)
686        fatal("Object file architecture does not match compiled ISA (MIPS).");
687    switch (objFile->getOpSys()) {
688      case ObjectFile::UnknownOpSys:
689        warn("Unknown operating system; assuming Linux.");
690        // fall through
691      case ObjectFile::Linux:
692        process = new MipsLinuxProcess(params, objFile);
693        break;
694
695      default:
696        fatal("Unknown/unsupported operating system.");
697    }
698#elif THE_ISA == ARM_ISA
699    if (objFile->getArch() != ObjectFile::Arm &&
700        objFile->getArch() != ObjectFile::Thumb)
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        process = new ArmLinuxProcess(params, objFile, objFile->getArch());
708        break;
709      case ObjectFile::LinuxArmOABI:
710        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
711              " EABI compiler.");
712      default:
713        fatal("Unknown/unsupported operating system.");
714    }
715#elif THE_ISA == POWER_ISA
716    if (objFile->getArch() != ObjectFile::Power)
717        fatal("Object file architecture does not match compiled ISA (Power).");
718    switch (objFile->getOpSys()) {
719      case ObjectFile::UnknownOpSys:
720        warn("Unknown operating system; assuming Linux.");
721        // fall through
722      case ObjectFile::Linux:
723        process = new PowerLinuxProcess(params, objFile);
724        break;
725
726      default:
727        fatal("Unknown/unsupported operating system.");
728    }
729#else
730#error "THE_ISA not set"
731#endif
732
733
734    if (process == NULL)
735        fatal("Unknown error creating process object.");
736    return process;
737}
738
739LiveProcess *
740LiveProcessParams::create()
741{
742    return LiveProcess::create(this);
743}
744