process.cc revision 7488:cf7c4345ea82 
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 <unistd.h>
34#include <fcntl.h>
35
36#include <cstdio>
37#include <string>
38
39#include "base/intmath.hh"
40#include "base/loader/object_file.hh"
41#include "base/loader/symtab.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/Process.hh"
50#include "params/LiveProcess.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), checkpointRestored(false),
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(this);
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() + ".PROG: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::startup()
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 > 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 > MAX_FD)
326        panic("sim_fd_obj called in fd out of range.");
327
328    return &fd_map[tgt_fd];
329}
330
331bool
332Process::checkAndAllocNextPage(Addr vaddr)
333{
334    // if this is an initial write we might not have
335    if (vaddr >= stack_min && vaddr < stack_base) {
336        pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
337        return true;
338    }
339
340    // We've accessed the next page of the stack, so extend the stack
341    // to cover it.
342    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
343        while (vaddr < stack_min) {
344            stack_min -= TheISA::PageBytes;
345            if(stack_base - stack_min > max_stack_size)
346                fatal("Maximum stack size exceeded\n");
347            if(stack_base - stack_min > 8*1024*1024)
348                fatal("Over max stack size for one thread\n");
349            pTable->allocate(stack_min, TheISA::PageBytes);
350            inform("Increasing stack size by one page.");
351        };
352        return true;
353    }
354    return false;
355}
356
357// find all offsets for currently open files and save them
358void
359Process::fix_file_offsets()
360{
361    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
362    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
363    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
364    string in = fdo_stdin->filename;
365    string out = fdo_stdout->filename;
366    string err = fdo_stderr->filename;
367
368    // initialize file descriptors to default: same as simulator
369    int stdin_fd, stdout_fd, stderr_fd;
370
371    if (in == "stdin" || in == "cin")
372        stdin_fd = STDIN_FILENO;
373    else if (in == "None")
374        stdin_fd = -1;
375    else {
376        // open standard in and seek to the right location
377        stdin_fd = Process::openInputFile(in);
378        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
379            panic("Unable to seek to correct location in file: %s", in);
380    }
381
382    if (out == "stdout" || out == "cout")
383        stdout_fd = STDOUT_FILENO;
384    else if (out == "stderr" || out == "cerr")
385        stdout_fd = STDERR_FILENO;
386    else if (out == "None")
387        stdout_fd = -1;
388    else {
389        stdout_fd = Process::openOutputFile(out);
390        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
391            panic("Unable to seek to correct location in file: %s", out);
392    }
393
394    if (err == "stdout" || err == "cout")
395        stderr_fd = STDOUT_FILENO;
396    else if (err == "stderr" || err == "cerr")
397        stderr_fd = STDERR_FILENO;
398    else if (err == "None")
399        stderr_fd = -1;
400    else if (err == out)
401        stderr_fd = stdout_fd;
402    else {
403        stderr_fd = Process::openOutputFile(err);
404        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
405            panic("Unable to seek to correct location in file: %s", err);
406    }
407
408    fdo_stdin->fd = stdin_fd;
409    fdo_stdout->fd = stdout_fd;
410    fdo_stderr->fd = stderr_fd;
411
412
413    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
414        Process::FdMap *fdo = &fd_map[free_fd];
415        if (fdo->fd != -1) {
416            if (fdo->isPipe){
417                if (fdo->filename == "PIPE-WRITE")
418                    continue;
419                else {
420                    assert (fdo->filename == "PIPE-READ");
421                    //create a new pipe
422                    int fds[2];
423                    int pipe_retval = pipe(fds);
424
425                    if (pipe_retval < 0) {
426                        // error
427                        panic("Unable to create new pipe.");
428                    }
429                    fdo->fd = fds[0]; //set read pipe
430                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
431                    if (fdo_write->filename != "PIPE-WRITE")
432                        panic ("Couldn't find write end of the pipe");
433
434                    fdo_write->fd = fds[1];//set write pipe
435               }
436            } else {
437                //Open file
438                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
439
440                if (fd == -1)
441                    panic("Unable to open file: %s", fdo->filename);
442                fdo->fd = fd;
443
444                //Seek to correct location before checkpoint
445                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
446                    panic("Unable to seek to correct location in file: %s",
447                          fdo->filename);
448            }
449        }
450    }
451}
452
453void
454Process::find_file_offsets()
455{
456    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
457        Process::FdMap *fdo = &fd_map[free_fd];
458        if (fdo->fd != -1) {
459            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
460        } else {
461                fdo->filename = "NULL";
462                fdo->fileOffset = 0;
463        }
464    }
465}
466
467void
468Process::setReadPipeSource(int read_pipe_fd, int source_fd)
469{
470    Process::FdMap *fdo = &fd_map[read_pipe_fd];
471    fdo->readPipeSource = source_fd;
472}
473
474void
475Process::FdMap::serialize(std::ostream &os)
476{
477    SERIALIZE_SCALAR(fd);
478    SERIALIZE_SCALAR(isPipe);
479    SERIALIZE_SCALAR(filename);
480    SERIALIZE_SCALAR(flags);
481    SERIALIZE_SCALAR(readPipeSource);
482    SERIALIZE_SCALAR(fileOffset);
483}
484
485void
486Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
487{
488    UNSERIALIZE_SCALAR(fd);
489    UNSERIALIZE_SCALAR(isPipe);
490    UNSERIALIZE_SCALAR(filename);
491    UNSERIALIZE_SCALAR(flags);
492    UNSERIALIZE_SCALAR(readPipeSource);
493    UNSERIALIZE_SCALAR(fileOffset);
494}
495
496void
497Process::serialize(std::ostream &os)
498{
499    SERIALIZE_SCALAR(brk_point);
500    SERIALIZE_SCALAR(stack_base);
501    SERIALIZE_SCALAR(stack_size);
502    SERIALIZE_SCALAR(stack_min);
503    SERIALIZE_SCALAR(next_thread_stack_base);
504    SERIALIZE_SCALAR(mmap_start);
505    SERIALIZE_SCALAR(mmap_end);
506    SERIALIZE_SCALAR(nxm_start);
507    SERIALIZE_SCALAR(nxm_end);
508    find_file_offsets();
509    pTable->serialize(os);
510    for (int x = 0; x <= MAX_FD; x++) {
511        nameOut(os, csprintf("%s.FdMap%d", name(), x));
512        fd_map[x].serialize(os);
513    }
514    SERIALIZE_SCALAR(M5_pid);
515
516}
517
518void
519Process::unserialize(Checkpoint *cp, const std::string &section)
520{
521    UNSERIALIZE_SCALAR(brk_point);
522    UNSERIALIZE_SCALAR(stack_base);
523    UNSERIALIZE_SCALAR(stack_size);
524    UNSERIALIZE_SCALAR(stack_min);
525    UNSERIALIZE_SCALAR(next_thread_stack_base);
526    UNSERIALIZE_SCALAR(mmap_start);
527    UNSERIALIZE_SCALAR(mmap_end);
528    UNSERIALIZE_SCALAR(nxm_start);
529    UNSERIALIZE_SCALAR(nxm_end);
530    pTable->unserialize(cp, section);
531    for (int x = 0; x <= MAX_FD; x++) {
532        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
533    }
534    fix_file_offsets();
535    UNSERIALIZE_OPT_SCALAR(M5_pid);
536    // The above returns a bool so that you could do something if you don't
537    // find the param in the checkpoint if you wanted to, like set a default
538    // but in this case we'll just stick with the instantianted value if not
539    // found.
540
541    checkpointRestored = true;
542
543}
544
545
546////////////////////////////////////////////////////////////////////////
547//
548// LiveProcess member definitions
549//
550////////////////////////////////////////////////////////////////////////
551
552
553LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
554    : Process(params), objFile(_objFile),
555      argv(params->cmd), envp(params->env), cwd(params->cwd)
556{
557    __uid = params->uid;
558    __euid = params->euid;
559    __gid = params->gid;
560    __egid = params->egid;
561    __pid = params->pid;
562    __ppid = params->ppid;
563
564    prog_fname = params->cmd[0];
565
566    // load up symbols, if any... these may be used for debugging or
567    // profiling.
568    if (!debugSymbolTable) {
569        debugSymbolTable = new SymbolTable();
570        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
571            !objFile->loadLocalSymbols(debugSymbolTable)) {
572            // didn't load any symbols
573            delete debugSymbolTable;
574            debugSymbolTable = NULL;
575        }
576    }
577}
578
579void
580LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
581{
582    num_syscalls++;
583
584    SyscallDesc *desc = getDesc(callnum);
585    if (desc == NULL)
586        fatal("Syscall %d out of range", callnum);
587
588    desc->doSyscall(callnum, this, tc);
589}
590
591IntReg
592LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
593{
594    return getSyscallArg(tc, i);
595}
596
597LiveProcess *
598LiveProcess::create(LiveProcessParams * params)
599{
600    LiveProcess *process = NULL;
601
602    string executable =
603        params->executable == "" ? params->cmd[0] : params->executable;
604    ObjectFile *objFile = createObjectFile(executable);
605    if (objFile == NULL) {
606        fatal("Can't load object file %s", executable);
607    }
608
609    if (objFile->isDynamic())
610       fatal("Object file is a dynamic executable however only static "
611             "executables are supported!\n       Please recompile your "
612             "executable as a static binary and try again.\n");
613
614#if THE_ISA == ALPHA_ISA
615    if (objFile->getArch() != ObjectFile::Alpha)
616        fatal("Object file architecture does not match compiled ISA (Alpha).");
617
618    switch (objFile->getOpSys()) {
619      case ObjectFile::Tru64:
620        process = new AlphaTru64Process(params, objFile);
621        break;
622
623      case ObjectFile::UnknownOpSys:
624        warn("Unknown operating system; assuming Linux.");
625        // fall through
626      case ObjectFile::Linux:
627        process = new AlphaLinuxProcess(params, objFile);
628        break;
629
630      default:
631        fatal("Unknown/unsupported operating system.");
632    }
633#elif THE_ISA == SPARC_ISA
634    if (objFile->getArch() != ObjectFile::SPARC64 &&
635        objFile->getArch() != ObjectFile::SPARC32)
636        fatal("Object file architecture does not match compiled ISA (SPARC).");
637    switch (objFile->getOpSys()) {
638      case ObjectFile::UnknownOpSys:
639        warn("Unknown operating system; assuming Linux.");
640        // fall through
641      case ObjectFile::Linux:
642        if (objFile->getArch() == ObjectFile::SPARC64) {
643            process = new Sparc64LinuxProcess(params, objFile);
644        } else {
645            process = new Sparc32LinuxProcess(params, objFile);
646        }
647        break;
648
649
650      case ObjectFile::Solaris:
651        process = new SparcSolarisProcess(params, objFile);
652        break;
653
654      default:
655        fatal("Unknown/unsupported operating system.");
656    }
657#elif THE_ISA == X86_ISA
658    if (objFile->getArch() != ObjectFile::X86_64 &&
659        objFile->getArch() != ObjectFile::I386)
660        fatal("Object file architecture does not match compiled ISA (x86).");
661    switch (objFile->getOpSys()) {
662      case ObjectFile::UnknownOpSys:
663        warn("Unknown operating system; assuming Linux.");
664        // fall through
665      case ObjectFile::Linux:
666        if (objFile->getArch() == ObjectFile::X86_64) {
667            process = new X86_64LinuxProcess(params, objFile);
668        } else {
669            process = new I386LinuxProcess(params, objFile);
670        }
671        break;
672
673      default:
674        fatal("Unknown/unsupported operating system.");
675    }
676#elif THE_ISA == MIPS_ISA
677    if (objFile->getArch() != ObjectFile::Mips)
678        fatal("Object file architecture does not match compiled ISA (MIPS).");
679    switch (objFile->getOpSys()) {
680      case ObjectFile::UnknownOpSys:
681        warn("Unknown operating system; assuming Linux.");
682        // fall through
683      case ObjectFile::Linux:
684        process = new MipsLinuxProcess(params, objFile);
685        break;
686
687      default:
688        fatal("Unknown/unsupported operating system.");
689    }
690#elif THE_ISA == ARM_ISA
691    if (objFile->getArch() != ObjectFile::Arm &&
692        objFile->getArch() != ObjectFile::Thumb)
693        fatal("Object file architecture does not match compiled ISA (ARM).");
694    switch (objFile->getOpSys()) {
695      case ObjectFile::UnknownOpSys:
696        warn("Unknown operating system; assuming Linux.");
697        // fall through
698      case ObjectFile::Linux:
699        process = new ArmLinuxProcess(params, objFile, objFile->getArch());
700        break;
701      case ObjectFile::LinuxArmOABI:
702        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
703              " EABI compiler.");
704      default:
705        fatal("Unknown/unsupported operating system.");
706    }
707#elif THE_ISA == POWER_ISA
708    if (objFile->getArch() != ObjectFile::Power)
709        fatal("Object file architecture does not match compiled ISA (Power).");
710    switch (objFile->getOpSys()) {
711      case ObjectFile::UnknownOpSys:
712        warn("Unknown operating system; assuming Linux.");
713        // fall through
714      case ObjectFile::Linux:
715        process = new PowerLinuxProcess(params, objFile);
716        break;
717
718      default:
719        fatal("Unknown/unsupported operating system.");
720    }
721#else
722#error "THE_ISA not set"
723#endif
724
725
726    if (process == NULL)
727        fatal("Unknown error creating process object.");
728    return process;
729}
730
731LiveProcess *
732LiveProcessParams::create()
733{
734    return LiveProcess::create(this);
735}
736