process.cc revision 8706 
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/se_translating_port_proxy.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    initVirtMem = new SETranslatingPortProxy(*system->getSystemPort(), this,
248                                             SETranslatingPortProxy::Always);
249}
250
251// map simulator fd sim_fd to target fd tgt_fd
252void
253Process::dup_fd(int sim_fd, int tgt_fd)
254{
255    if (tgt_fd < 0 || tgt_fd > MAX_FD)
256        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
257
258    Process::FdMap *fdo = &fd_map[tgt_fd];
259    fdo->fd = sim_fd;
260}
261
262
263// generate new target fd for sim_fd
264int
265Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
266{
267    // in case open() returns an error, don't allocate a new fd
268    if (sim_fd == -1)
269        return -1;
270
271    // find first free target fd
272    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
273        Process::FdMap *fdo = &fd_map[free_fd];
274        if (fdo->fd == -1) {
275            fdo->fd = sim_fd;
276            fdo->filename = filename;
277            fdo->mode = mode;
278            fdo->fileOffset = 0;
279            fdo->flags = flags;
280            fdo->isPipe = pipe;
281            fdo->readPipeSource = 0;
282            return free_fd;
283        }
284    }
285
286    panic("Process::alloc_fd: out of file descriptors!");
287}
288
289
290// free target fd (e.g., after close)
291void
292Process::free_fd(int tgt_fd)
293{
294    Process::FdMap *fdo = &fd_map[tgt_fd];
295    if (fdo->fd == -1)
296        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
297
298    fdo->fd = -1;
299    fdo->filename = "NULL";
300    fdo->mode = 0;
301    fdo->fileOffset = 0;
302    fdo->flags = 0;
303    fdo->isPipe = false;
304    fdo->readPipeSource = 0;
305}
306
307
308// look up simulator fd for given target fd
309int
310Process::sim_fd(int tgt_fd)
311{
312    if (tgt_fd < 0 || tgt_fd > MAX_FD)
313        return -1;
314
315    return fd_map[tgt_fd].fd;
316}
317
318Process::FdMap *
319Process::sim_fd_obj(int tgt_fd)
320{
321    if (tgt_fd < 0 || tgt_fd > MAX_FD)
322        return NULL;
323
324    return &fd_map[tgt_fd];
325}
326
327void
328Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
329{
330    int npages = divCeil(size, (int64_t)VMPageSize);
331    Addr paddr = system->allocPhysPages(npages);
332    pTable->map(vaddr, paddr, size, clobber);
333}
334
335bool
336Process::fixupStackFault(Addr vaddr)
337{
338    // Check if this is already on the stack and there's just no page there
339    // yet.
340    if (vaddr >= stack_min && vaddr < stack_base) {
341        allocateMem(roundDown(vaddr, VMPageSize), VMPageSize);
342        return true;
343    }
344
345    // We've accessed the next page of the stack, so extend it to include
346    // this address.
347    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
348        while (vaddr < stack_min) {
349            stack_min -= TheISA::PageBytes;
350            if (stack_base - stack_min > max_stack_size)
351                fatal("Maximum stack size exceeded\n");
352            if (stack_base - stack_min > 8 * 1024 * 1024)
353                fatal("Over max stack size for one thread\n");
354            allocateMem(stack_min, TheISA::PageBytes);
355            inform("Increasing stack size by one page.");
356        };
357        return true;
358    }
359    return false;
360}
361
362// find all offsets for currently open files and save them
363void
364Process::fix_file_offsets()
365{
366    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
367    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
368    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
369    string in = fdo_stdin->filename;
370    string out = fdo_stdout->filename;
371    string err = fdo_stderr->filename;
372
373    // initialize file descriptors to default: same as simulator
374    int stdin_fd, stdout_fd, stderr_fd;
375
376    if (in == "stdin" || in == "cin")
377        stdin_fd = STDIN_FILENO;
378    else if (in == "None")
379        stdin_fd = -1;
380    else {
381        // open standard in and seek to the right location
382        stdin_fd = Process::openInputFile(in);
383        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
384            panic("Unable to seek to correct location in file: %s", in);
385    }
386
387    if (out == "stdout" || out == "cout")
388        stdout_fd = STDOUT_FILENO;
389    else if (out == "stderr" || out == "cerr")
390        stdout_fd = STDERR_FILENO;
391    else if (out == "None")
392        stdout_fd = -1;
393    else {
394        stdout_fd = Process::openOutputFile(out);
395        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
396            panic("Unable to seek to correct location in file: %s", out);
397    }
398
399    if (err == "stdout" || err == "cout")
400        stderr_fd = STDOUT_FILENO;
401    else if (err == "stderr" || err == "cerr")
402        stderr_fd = STDERR_FILENO;
403    else if (err == "None")
404        stderr_fd = -1;
405    else if (err == out)
406        stderr_fd = stdout_fd;
407    else {
408        stderr_fd = Process::openOutputFile(err);
409        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
410            panic("Unable to seek to correct location in file: %s", err);
411    }
412
413    fdo_stdin->fd = stdin_fd;
414    fdo_stdout->fd = stdout_fd;
415    fdo_stderr->fd = stderr_fd;
416
417
418    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
419        Process::FdMap *fdo = &fd_map[free_fd];
420        if (fdo->fd != -1) {
421            if (fdo->isPipe){
422                if (fdo->filename == "PIPE-WRITE")
423                    continue;
424                else {
425                    assert (fdo->filename == "PIPE-READ");
426                    //create a new pipe
427                    int fds[2];
428                    int pipe_retval = pipe(fds);
429
430                    if (pipe_retval < 0) {
431                        // error
432                        panic("Unable to create new pipe.");
433                    }
434                    fdo->fd = fds[0]; //set read pipe
435                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
436                    if (fdo_write->filename != "PIPE-WRITE")
437                        panic ("Couldn't find write end of the pipe");
438
439                    fdo_write->fd = fds[1];//set write pipe
440               }
441            } else {
442                //Open file
443                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
444
445                if (fd == -1)
446                    panic("Unable to open file: %s", fdo->filename);
447                fdo->fd = fd;
448
449                //Seek to correct location before checkpoint
450                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
451                    panic("Unable to seek to correct location in file: %s",
452                          fdo->filename);
453            }
454        }
455    }
456}
457
458void
459Process::find_file_offsets()
460{
461    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
462        Process::FdMap *fdo = &fd_map[free_fd];
463        if (fdo->fd != -1) {
464            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
465        } else {
466                fdo->filename = "NULL";
467                fdo->fileOffset = 0;
468        }
469    }
470}
471
472void
473Process::setReadPipeSource(int read_pipe_fd, int source_fd)
474{
475    Process::FdMap *fdo = &fd_map[read_pipe_fd];
476    fdo->readPipeSource = source_fd;
477}
478
479void
480Process::FdMap::serialize(std::ostream &os)
481{
482    SERIALIZE_SCALAR(fd);
483    SERIALIZE_SCALAR(isPipe);
484    SERIALIZE_SCALAR(filename);
485    SERIALIZE_SCALAR(flags);
486    SERIALIZE_SCALAR(readPipeSource);
487    SERIALIZE_SCALAR(fileOffset);
488}
489
490void
491Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
492{
493    UNSERIALIZE_SCALAR(fd);
494    UNSERIALIZE_SCALAR(isPipe);
495    UNSERIALIZE_SCALAR(filename);
496    UNSERIALIZE_SCALAR(flags);
497    UNSERIALIZE_SCALAR(readPipeSource);
498    UNSERIALIZE_SCALAR(fileOffset);
499}
500
501void
502Process::serialize(std::ostream &os)
503{
504    SERIALIZE_SCALAR(brk_point);
505    SERIALIZE_SCALAR(stack_base);
506    SERIALIZE_SCALAR(stack_size);
507    SERIALIZE_SCALAR(stack_min);
508    SERIALIZE_SCALAR(next_thread_stack_base);
509    SERIALIZE_SCALAR(mmap_start);
510    SERIALIZE_SCALAR(mmap_end);
511    SERIALIZE_SCALAR(nxm_start);
512    SERIALIZE_SCALAR(nxm_end);
513    find_file_offsets();
514    pTable->serialize(os);
515    for (int x = 0; x <= MAX_FD; x++) {
516        nameOut(os, csprintf("%s.FdMap%d", name(), x));
517        fd_map[x].serialize(os);
518    }
519    SERIALIZE_SCALAR(M5_pid);
520
521}
522
523void
524Process::unserialize(Checkpoint *cp, const std::string &section)
525{
526    UNSERIALIZE_SCALAR(brk_point);
527    UNSERIALIZE_SCALAR(stack_base);
528    UNSERIALIZE_SCALAR(stack_size);
529    UNSERIALIZE_SCALAR(stack_min);
530    UNSERIALIZE_SCALAR(next_thread_stack_base);
531    UNSERIALIZE_SCALAR(mmap_start);
532    UNSERIALIZE_SCALAR(mmap_end);
533    UNSERIALIZE_SCALAR(nxm_start);
534    UNSERIALIZE_SCALAR(nxm_end);
535    pTable->unserialize(cp, section);
536    for (int x = 0; x <= MAX_FD; x++) {
537        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
538    }
539    fix_file_offsets();
540    UNSERIALIZE_OPT_SCALAR(M5_pid);
541    // The above returns a bool so that you could do something if you don't
542    // find the param in the checkpoint if you wanted to, like set a default
543    // but in this case we'll just stick with the instantianted value if not
544    // found.
545}
546
547
548////////////////////////////////////////////////////////////////////////
549//
550// LiveProcess member definitions
551//
552////////////////////////////////////////////////////////////////////////
553
554
555LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
556    : Process(params), objFile(_objFile),
557      argv(params->cmd), envp(params->env), cwd(params->cwd)
558{
559    __uid = params->uid;
560    __euid = params->euid;
561    __gid = params->gid;
562    __egid = params->egid;
563    __pid = params->pid;
564    __ppid = params->ppid;
565
566    prog_fname = params->cmd[0];
567
568    // load up symbols, if any... these may be used for debugging or
569    // profiling.
570    if (!debugSymbolTable) {
571        debugSymbolTable = new SymbolTable();
572        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
573            !objFile->loadLocalSymbols(debugSymbolTable)) {
574            // didn't load any symbols
575            delete debugSymbolTable;
576            debugSymbolTable = NULL;
577        }
578    }
579}
580
581void
582LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
583{
584    num_syscalls++;
585
586    SyscallDesc *desc = getDesc(callnum);
587    if (desc == NULL)
588        fatal("Syscall %d out of range", callnum);
589
590    desc->doSyscall(callnum, this, tc);
591}
592
593IntReg
594LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
595{
596    return getSyscallArg(tc, i);
597}
598
599LiveProcess *
600LiveProcess::create(LiveProcessParams * params)
601{
602    LiveProcess *process = NULL;
603
604    string executable =
605        params->executable == "" ? params->cmd[0] : params->executable;
606    ObjectFile *objFile = createObjectFile(executable);
607    if (objFile == NULL) {
608        fatal("Can't load object file %s", executable);
609    }
610
611    if (objFile->isDynamic())
612       fatal("Object file is a dynamic executable however only static "
613             "executables are supported!\n       Please recompile your "
614             "executable as a static binary and try again.\n");
615
616#if THE_ISA == ALPHA_ISA
617    if (objFile->getArch() != ObjectFile::Alpha)
618        fatal("Object file architecture does not match compiled ISA (Alpha).");
619
620    switch (objFile->getOpSys()) {
621      case ObjectFile::Tru64:
622        process = new AlphaTru64Process(params, objFile);
623        break;
624
625      case ObjectFile::UnknownOpSys:
626        warn("Unknown operating system; assuming Linux.");
627        // fall through
628      case ObjectFile::Linux:
629        process = new AlphaLinuxProcess(params, objFile);
630        break;
631
632      default:
633        fatal("Unknown/unsupported operating system.");
634    }
635#elif THE_ISA == SPARC_ISA
636    if (objFile->getArch() != ObjectFile::SPARC64 &&
637        objFile->getArch() != ObjectFile::SPARC32)
638        fatal("Object file architecture does not match compiled ISA (SPARC).");
639    switch (objFile->getOpSys()) {
640      case ObjectFile::UnknownOpSys:
641        warn("Unknown operating system; assuming Linux.");
642        // fall through
643      case ObjectFile::Linux:
644        if (objFile->getArch() == ObjectFile::SPARC64) {
645            process = new Sparc64LinuxProcess(params, objFile);
646        } else {
647            process = new Sparc32LinuxProcess(params, objFile);
648        }
649        break;
650
651
652      case ObjectFile::Solaris:
653        process = new SparcSolarisProcess(params, objFile);
654        break;
655
656      default:
657        fatal("Unknown/unsupported operating system.");
658    }
659#elif THE_ISA == X86_ISA
660    if (objFile->getArch() != ObjectFile::X86_64 &&
661        objFile->getArch() != ObjectFile::I386)
662        fatal("Object file architecture does not match compiled ISA (x86).");
663    switch (objFile->getOpSys()) {
664      case ObjectFile::UnknownOpSys:
665        warn("Unknown operating system; assuming Linux.");
666        // fall through
667      case ObjectFile::Linux:
668        if (objFile->getArch() == ObjectFile::X86_64) {
669            process = new X86_64LinuxProcess(params, objFile);
670        } else {
671            process = new I386LinuxProcess(params, objFile);
672        }
673        break;
674
675      default:
676        fatal("Unknown/unsupported operating system.");
677    }
678#elif THE_ISA == MIPS_ISA
679    if (objFile->getArch() != ObjectFile::Mips)
680        fatal("Object file architecture does not match compiled ISA (MIPS).");
681    switch (objFile->getOpSys()) {
682      case ObjectFile::UnknownOpSys:
683        warn("Unknown operating system; assuming Linux.");
684        // fall through
685      case ObjectFile::Linux:
686        process = new MipsLinuxProcess(params, objFile);
687        break;
688
689      default:
690        fatal("Unknown/unsupported operating system.");
691    }
692#elif THE_ISA == ARM_ISA
693    if (objFile->getArch() != ObjectFile::Arm &&
694        objFile->getArch() != ObjectFile::Thumb)
695        fatal("Object file architecture does not match compiled ISA (ARM).");
696    switch (objFile->getOpSys()) {
697      case ObjectFile::UnknownOpSys:
698        warn("Unknown operating system; assuming Linux.");
699        // fall through
700      case ObjectFile::Linux:
701        process = new ArmLinuxProcess(params, objFile, objFile->getArch());
702        break;
703      case ObjectFile::LinuxArmOABI:
704        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
705              " EABI compiler.");
706      default:
707        fatal("Unknown/unsupported operating system.");
708    }
709#elif THE_ISA == POWER_ISA
710    if (objFile->getArch() != ObjectFile::Power)
711        fatal("Object file architecture does not match compiled ISA (Power).");
712    switch (objFile->getOpSys()) {
713      case ObjectFile::UnknownOpSys:
714        warn("Unknown operating system; assuming Linux.");
715        // fall through
716      case ObjectFile::Linux:
717        process = new PowerLinuxProcess(params, objFile);
718        break;
719
720      default:
721        fatal("Unknown/unsupported operating system.");
722    }
723#else
724#error "THE_ISA not set"
725#endif
726
727
728    if (process == NULL)
729        fatal("Unknown error creating process object.");
730    return process;
731}
732
733LiveProcess *
734LiveProcessParams::create()
735{
736    return LiveProcess::create(this);
737}
738