process.cc revision 8534:09745e0c3dd9 
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(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() + ".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
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    warn("Not increasing stack: requested vaddr is outside of stack range.");
355    return false;
356}
357
358// find all offsets for currently open files and save them
359void
360Process::fix_file_offsets()
361{
362    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
363    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
364    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
365    string in = fdo_stdin->filename;
366    string out = fdo_stdout->filename;
367    string err = fdo_stderr->filename;
368
369    // initialize file descriptors to default: same as simulator
370    int stdin_fd, stdout_fd, stderr_fd;
371
372    if (in == "stdin" || in == "cin")
373        stdin_fd = STDIN_FILENO;
374    else if (in == "None")
375        stdin_fd = -1;
376    else {
377        // open standard in and seek to the right location
378        stdin_fd = Process::openInputFile(in);
379        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
380            panic("Unable to seek to correct location in file: %s", in);
381    }
382
383    if (out == "stdout" || out == "cout")
384        stdout_fd = STDOUT_FILENO;
385    else if (out == "stderr" || out == "cerr")
386        stdout_fd = STDERR_FILENO;
387    else if (out == "None")
388        stdout_fd = -1;
389    else {
390        stdout_fd = Process::openOutputFile(out);
391        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
392            panic("Unable to seek to correct location in file: %s", out);
393    }
394
395    if (err == "stdout" || err == "cout")
396        stderr_fd = STDOUT_FILENO;
397    else if (err == "stderr" || err == "cerr")
398        stderr_fd = STDERR_FILENO;
399    else if (err == "None")
400        stderr_fd = -1;
401    else if (err == out)
402        stderr_fd = stdout_fd;
403    else {
404        stderr_fd = Process::openOutputFile(err);
405        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
406            panic("Unable to seek to correct location in file: %s", err);
407    }
408
409    fdo_stdin->fd = stdin_fd;
410    fdo_stdout->fd = stdout_fd;
411    fdo_stderr->fd = stderr_fd;
412
413
414    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
415        Process::FdMap *fdo = &fd_map[free_fd];
416        if (fdo->fd != -1) {
417            if (fdo->isPipe){
418                if (fdo->filename == "PIPE-WRITE")
419                    continue;
420                else {
421                    assert (fdo->filename == "PIPE-READ");
422                    //create a new pipe
423                    int fds[2];
424                    int pipe_retval = pipe(fds);
425
426                    if (pipe_retval < 0) {
427                        // error
428                        panic("Unable to create new pipe.");
429                    }
430                    fdo->fd = fds[0]; //set read pipe
431                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
432                    if (fdo_write->filename != "PIPE-WRITE")
433                        panic ("Couldn't find write end of the pipe");
434
435                    fdo_write->fd = fds[1];//set write pipe
436               }
437            } else {
438                //Open file
439                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
440
441                if (fd == -1)
442                    panic("Unable to open file: %s", fdo->filename);
443                fdo->fd = fd;
444
445                //Seek to correct location before checkpoint
446                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
447                    panic("Unable to seek to correct location in file: %s",
448                          fdo->filename);
449            }
450        }
451    }
452}
453
454void
455Process::find_file_offsets()
456{
457    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
458        Process::FdMap *fdo = &fd_map[free_fd];
459        if (fdo->fd != -1) {
460            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
461        } else {
462                fdo->filename = "NULL";
463                fdo->fileOffset = 0;
464        }
465    }
466}
467
468void
469Process::setReadPipeSource(int read_pipe_fd, int source_fd)
470{
471    Process::FdMap *fdo = &fd_map[read_pipe_fd];
472    fdo->readPipeSource = source_fd;
473}
474
475void
476Process::FdMap::serialize(std::ostream &os)
477{
478    SERIALIZE_SCALAR(fd);
479    SERIALIZE_SCALAR(isPipe);
480    SERIALIZE_SCALAR(filename);
481    SERIALIZE_SCALAR(flags);
482    SERIALIZE_SCALAR(readPipeSource);
483    SERIALIZE_SCALAR(fileOffset);
484}
485
486void
487Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
488{
489    UNSERIALIZE_SCALAR(fd);
490    UNSERIALIZE_SCALAR(isPipe);
491    UNSERIALIZE_SCALAR(filename);
492    UNSERIALIZE_SCALAR(flags);
493    UNSERIALIZE_SCALAR(readPipeSource);
494    UNSERIALIZE_SCALAR(fileOffset);
495}
496
497void
498Process::serialize(std::ostream &os)
499{
500    SERIALIZE_SCALAR(brk_point);
501    SERIALIZE_SCALAR(stack_base);
502    SERIALIZE_SCALAR(stack_size);
503    SERIALIZE_SCALAR(stack_min);
504    SERIALIZE_SCALAR(next_thread_stack_base);
505    SERIALIZE_SCALAR(mmap_start);
506    SERIALIZE_SCALAR(mmap_end);
507    SERIALIZE_SCALAR(nxm_start);
508    SERIALIZE_SCALAR(nxm_end);
509    find_file_offsets();
510    pTable->serialize(os);
511    for (int x = 0; x <= MAX_FD; x++) {
512        nameOut(os, csprintf("%s.FdMap%d", name(), x));
513        fd_map[x].serialize(os);
514    }
515    SERIALIZE_SCALAR(M5_pid);
516
517}
518
519void
520Process::unserialize(Checkpoint *cp, const std::string &section)
521{
522    UNSERIALIZE_SCALAR(brk_point);
523    UNSERIALIZE_SCALAR(stack_base);
524    UNSERIALIZE_SCALAR(stack_size);
525    UNSERIALIZE_SCALAR(stack_min);
526    UNSERIALIZE_SCALAR(next_thread_stack_base);
527    UNSERIALIZE_SCALAR(mmap_start);
528    UNSERIALIZE_SCALAR(mmap_end);
529    UNSERIALIZE_SCALAR(nxm_start);
530    UNSERIALIZE_SCALAR(nxm_end);
531    pTable->unserialize(cp, section);
532    for (int x = 0; x <= MAX_FD; x++) {
533        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
534    }
535    fix_file_offsets();
536    UNSERIALIZE_OPT_SCALAR(M5_pid);
537    // The above returns a bool so that you could do something if you don't
538    // find the param in the checkpoint if you wanted to, like set a default
539    // but in this case we'll just stick with the instantianted value if not
540    // found.
541}
542
543
544////////////////////////////////////////////////////////////////////////
545//
546// LiveProcess member definitions
547//
548////////////////////////////////////////////////////////////////////////
549
550
551LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
552    : Process(params), objFile(_objFile),
553      argv(params->cmd), envp(params->env), cwd(params->cwd)
554{
555    __uid = params->uid;
556    __euid = params->euid;
557    __gid = params->gid;
558    __egid = params->egid;
559    __pid = params->pid;
560    __ppid = params->ppid;
561
562    prog_fname = params->cmd[0];
563
564    // load up symbols, if any... these may be used for debugging or
565    // profiling.
566    if (!debugSymbolTable) {
567        debugSymbolTable = new SymbolTable();
568        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
569            !objFile->loadLocalSymbols(debugSymbolTable)) {
570            // didn't load any symbols
571            delete debugSymbolTable;
572            debugSymbolTable = NULL;
573        }
574    }
575}
576
577void
578LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
579{
580    num_syscalls++;
581
582    SyscallDesc *desc = getDesc(callnum);
583    if (desc == NULL)
584        fatal("Syscall %d out of range", callnum);
585
586    desc->doSyscall(callnum, this, tc);
587}
588
589IntReg
590LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
591{
592    return getSyscallArg(tc, i);
593}
594
595LiveProcess *
596LiveProcess::create(LiveProcessParams * params)
597{
598    LiveProcess *process = NULL;
599
600    string executable =
601        params->executable == "" ? params->cmd[0] : params->executable;
602    ObjectFile *objFile = createObjectFile(executable);
603    if (objFile == NULL) {
604        fatal("Can't load object file %s", executable);
605    }
606
607    if (objFile->isDynamic())
608       fatal("Object file is a dynamic executable however only static "
609             "executables are supported!\n       Please recompile your "
610             "executable as a static binary and try again.\n");
611
612#if THE_ISA == ALPHA_ISA
613    if (objFile->getArch() != ObjectFile::Alpha)
614        fatal("Object file architecture does not match compiled ISA (Alpha).");
615
616    switch (objFile->getOpSys()) {
617      case ObjectFile::Tru64:
618        process = new AlphaTru64Process(params, objFile);
619        break;
620
621      case ObjectFile::UnknownOpSys:
622        warn("Unknown operating system; assuming Linux.");
623        // fall through
624      case ObjectFile::Linux:
625        process = new AlphaLinuxProcess(params, objFile);
626        break;
627
628      default:
629        fatal("Unknown/unsupported operating system.");
630    }
631#elif THE_ISA == SPARC_ISA
632    if (objFile->getArch() != ObjectFile::SPARC64 &&
633        objFile->getArch() != ObjectFile::SPARC32)
634        fatal("Object file architecture does not match compiled ISA (SPARC).");
635    switch (objFile->getOpSys()) {
636      case ObjectFile::UnknownOpSys:
637        warn("Unknown operating system; assuming Linux.");
638        // fall through
639      case ObjectFile::Linux:
640        if (objFile->getArch() == ObjectFile::SPARC64) {
641            process = new Sparc64LinuxProcess(params, objFile);
642        } else {
643            process = new Sparc32LinuxProcess(params, objFile);
644        }
645        break;
646
647
648      case ObjectFile::Solaris:
649        process = new SparcSolarisProcess(params, objFile);
650        break;
651
652      default:
653        fatal("Unknown/unsupported operating system.");
654    }
655#elif THE_ISA == X86_ISA
656    if (objFile->getArch() != ObjectFile::X86_64 &&
657        objFile->getArch() != ObjectFile::I386)
658        fatal("Object file architecture does not match compiled ISA (x86).");
659    switch (objFile->getOpSys()) {
660      case ObjectFile::UnknownOpSys:
661        warn("Unknown operating system; assuming Linux.");
662        // fall through
663      case ObjectFile::Linux:
664        if (objFile->getArch() == ObjectFile::X86_64) {
665            process = new X86_64LinuxProcess(params, objFile);
666        } else {
667            process = new I386LinuxProcess(params, objFile);
668        }
669        break;
670
671      default:
672        fatal("Unknown/unsupported operating system.");
673    }
674#elif THE_ISA == MIPS_ISA
675    if (objFile->getArch() != ObjectFile::Mips)
676        fatal("Object file architecture does not match compiled ISA (MIPS).");
677    switch (objFile->getOpSys()) {
678      case ObjectFile::UnknownOpSys:
679        warn("Unknown operating system; assuming Linux.");
680        // fall through
681      case ObjectFile::Linux:
682        process = new MipsLinuxProcess(params, objFile);
683        break;
684
685      default:
686        fatal("Unknown/unsupported operating system.");
687    }
688#elif THE_ISA == ARM_ISA
689    if (objFile->getArch() != ObjectFile::Arm &&
690        objFile->getArch() != ObjectFile::Thumb)
691        fatal("Object file architecture does not match compiled ISA (ARM).");
692    switch (objFile->getOpSys()) {
693      case ObjectFile::UnknownOpSys:
694        warn("Unknown operating system; assuming Linux.");
695        // fall through
696      case ObjectFile::Linux:
697        process = new ArmLinuxProcess(params, objFile, objFile->getArch());
698        break;
699      case ObjectFile::LinuxArmOABI:
700        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
701              " EABI compiler.");
702      default:
703        fatal("Unknown/unsupported operating system.");
704    }
705#elif THE_ISA == POWER_ISA
706    if (objFile->getArch() != ObjectFile::Power)
707        fatal("Object file architecture does not match compiled ISA (Power).");
708    switch (objFile->getOpSys()) {
709      case ObjectFile::UnknownOpSys:
710        warn("Unknown operating system; assuming Linux.");
711        // fall through
712      case ObjectFile::Linux:
713        process = new PowerLinuxProcess(params, objFile);
714        break;
715
716      default:
717        fatal("Unknown/unsupported operating system.");
718    }
719#else
720#error "THE_ISA not set"
721#endif
722
723
724    if (process == NULL)
725        fatal("Unknown error creating process object.");
726    return process;
727}
728
729LiveProcess *
730LiveProcessParams::create()
731{
732    return LiveProcess::create(this);
733}
734