process.cc revision 5512 
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#include <string>
36
37#include "arch/remote_gdb.hh"
38#include "base/intmath.hh"
39#include "base/loader/object_file.hh"
40#include "base/loader/symtab.hh"
41#include "base/statistics.hh"
42#include "config/full_system.hh"
43#include "cpu/thread_context.hh"
44#include "mem/page_table.hh"
45#include "mem/physical.hh"
46#include "mem/translating_port.hh"
47#include "params/Process.hh"
48#include "params/LiveProcess.hh"
49#include "sim/debug.hh"
50#include "sim/process.hh"
51#include "sim/process_impl.hh"
52#include "sim/stats.hh"
53#include "sim/syscall_emul.hh"
54#include "sim/system.hh"
55
56#include "arch/isa_specific.hh"
57#if THE_ISA == ALPHA_ISA
58#include "arch/alpha/linux/process.hh"
59#include "arch/alpha/tru64/process.hh"
60#elif THE_ISA == SPARC_ISA
61#include "arch/sparc/linux/process.hh"
62#include "arch/sparc/solaris/process.hh"
63#elif THE_ISA == MIPS_ISA
64#include "arch/mips/linux/process.hh"
65#elif THE_ISA == ARM_ISA
66#include "arch/arm/linux/process.hh"
67#elif THE_ISA == X86_ISA
68#include "arch/x86/linux/process.hh"
69#else
70#error "THE_ISA not set"
71#endif
72
73
74using namespace std;
75using namespace TheISA;
76
77//
78// The purpose of this code is to fake the loader & syscall mechanism
79// when there's no OS: thus there's no resone to use it in FULL_SYSTEM
80// mode when we do have an OS
81//
82#if FULL_SYSTEM
83#error "process.cc not compatible with FULL_SYSTEM"
84#endif
85
86// current number of allocated processes
87int num_processes = 0;
88
89Process::Process(ProcessParams * params)
90    : SimObject(params), system(params->system), checkpointRestored(false),
91    max_stack_size(params->max_stack_size)
92{
93    string in = params->input;
94    string out = params->output;
95
96    // initialize file descriptors to default: same as simulator
97    int stdin_fd, stdout_fd, stderr_fd;
98
99    if (in == "stdin" || in == "cin")
100        stdin_fd = STDIN_FILENO;
101    else if (in == "None")
102        stdin_fd = -1;
103    else
104        stdin_fd = Process::openInputFile(in);
105
106    if (out == "stdout" || out == "cout")
107        stdout_fd = STDOUT_FILENO;
108    else if (out == "stderr" || out == "cerr")
109        stdout_fd = STDERR_FILENO;
110    else if (out == "None")
111        stdout_fd = -1;
112    else
113        stdout_fd = Process::openOutputFile(out);
114
115    stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO;
116
117    M5_pid = system->allocatePID();
118    // initialize first 3 fds (stdin, stdout, stderr)
119    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
120    fdo->fd = stdin_fd;
121    fdo->filename = in;
122    fdo->flags = O_RDONLY;
123    fdo->mode = -1;
124    fdo->fileOffset = 0;
125
126    fdo =  &fd_map[STDOUT_FILENO];
127    fdo->fd = stdout_fd;
128    fdo->filename = out;
129    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
130    fdo->mode = 0774;
131    fdo->fileOffset = 0;
132
133    fdo = &fd_map[STDERR_FILENO];
134    fdo->fd = stderr_fd;
135    fdo->filename = "STDERR";
136    fdo->flags = O_WRONLY;
137    fdo->mode = -1;
138    fdo->fileOffset = 0;
139
140
141    // mark remaining fds as free
142    for (int i = 3; i <= MAX_FD; ++i) {
143        Process::FdMap *fdo = &fd_map[i];
144        fdo->fd = -1;
145    }
146
147    mmap_start = mmap_end = 0;
148    nxm_start = nxm_end = 0;
149    pTable = new PageTable(this);
150    // other parameters will be initialized when the program is loaded
151}
152
153
154void
155Process::regStats()
156{
157    using namespace Stats;
158
159    num_syscalls
160        .name(name() + ".PROG:num_syscalls")
161        .desc("Number of system calls")
162        ;
163}
164
165//
166// static helper functions
167//
168int
169Process::openInputFile(const string &filename)
170{
171    int fd = open(filename.c_str(), O_RDONLY);
172
173    if (fd == -1) {
174        perror(NULL);
175        cerr << "unable to open \"" << filename << "\" for reading\n";
176        fatal("can't open input file");
177    }
178
179    return fd;
180}
181
182
183int
184Process::openOutputFile(const string &filename)
185{
186    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774);
187
188    if (fd == -1) {
189        perror(NULL);
190        cerr << "unable to open \"" << filename << "\" for writing\n";
191        fatal("can't open output file");
192    }
193
194    return fd;
195}
196
197
198int
199Process::registerThreadContext(ThreadContext *tc)
200{
201    // add to list
202    int myIndex = threadContexts.size();
203    threadContexts.push_back(tc);
204
205    int port = getRemoteGDBPort();
206    if (port) {
207        RemoteGDB *rgdb = new RemoteGDB(system, tc);
208        GDBListener *gdbl = new GDBListener(rgdb, port + myIndex);
209        gdbl->listen();
210
211        remoteGDB.push_back(rgdb);
212    }
213
214    // return CPU number to caller
215    return myIndex;
216}
217
218void
219Process::startup()
220{
221    if (threadContexts.empty())
222        fatal("Process %s is not associated with any CPUs!\n", name());
223
224    // first thread context for this process... initialize & enable
225    ThreadContext *tc = threadContexts[0];
226
227    // mark this context as active so it will start ticking.
228    tc->activate(0);
229
230    Port *mem_port;
231    mem_port = system->physmem->getPort("functional");
232    initVirtMem = new TranslatingPort("process init port", this,
233            TranslatingPort::Always);
234    mem_port->setPeer(initVirtMem);
235    initVirtMem->setPeer(mem_port);
236}
237
238void
239Process::replaceThreadContext(ThreadContext *tc, int tcIndex)
240{
241    if (tcIndex >= threadContexts.size()) {
242        panic("replaceThreadContext: bad tcIndex, %d >= %d\n",
243              tcIndex, threadContexts.size());
244    }
245
246    threadContexts[tcIndex] = tc;
247}
248
249// map simulator fd sim_fd to target fd tgt_fd
250void
251Process::dup_fd(int sim_fd, int tgt_fd)
252{
253    if (tgt_fd < 0 || tgt_fd > MAX_FD)
254        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
255
256    Process::FdMap *fdo = &fd_map[tgt_fd];
257    fdo->fd = sim_fd;
258}
259
260
261// generate new target fd for sim_fd
262int
263Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
264{
265    // in case open() returns an error, don't allocate a new fd
266    if (sim_fd == -1)
267        return -1;
268
269    // find first free target fd
270    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
271        Process::FdMap *fdo = &fd_map[free_fd];
272        if (fdo->fd == -1) {
273            fdo->fd = sim_fd;
274            fdo->filename = filename;
275            fdo->mode = mode;
276            fdo->fileOffset = 0;
277            fdo->flags = flags;
278            fdo->isPipe = pipe;
279            fdo->readPipeSource = 0;
280            return free_fd;
281        }
282    }
283
284    panic("Process::alloc_fd: out of file descriptors!");
285}
286
287
288// free target fd (e.g., after close)
289void
290Process::free_fd(int tgt_fd)
291{
292    Process::FdMap *fdo = &fd_map[tgt_fd];
293    if (fdo->fd == -1)
294        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
295
296    fdo->fd = -1;
297    fdo->filename = "NULL";
298    fdo->mode = 0;
299    fdo->fileOffset = 0;
300    fdo->flags = 0;
301    fdo->isPipe = false;
302    fdo->readPipeSource = 0;
303}
304
305
306// look up simulator fd for given target fd
307int
308Process::sim_fd(int tgt_fd)
309{
310    if (tgt_fd > MAX_FD)
311        return -1;
312
313    return fd_map[tgt_fd].fd;
314}
315
316Process::FdMap *
317Process::sim_fd_obj(int tgt_fd)
318{
319    if (tgt_fd > MAX_FD)
320        panic("sim_fd_obj called in fd out of range.");
321
322    return &fd_map[tgt_fd];
323}
324bool
325Process::checkAndAllocNextPage(Addr vaddr)
326{
327    // if this is an initial write we might not have
328    if (vaddr >= stack_min && vaddr < stack_base) {
329        pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
330        return true;
331    }
332
333    // We've accessed the next page of the stack, so extend the stack
334    // to cover it.
335    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
336        while (vaddr < stack_min) {
337            stack_min -= TheISA::PageBytes;
338            if(stack_base - stack_min > max_stack_size)
339                fatal("Maximum stack size exceeded\n");
340            if(stack_base - stack_min > 8*1024*1024)
341                fatal("Over max stack size for one thread\n");
342            pTable->allocate(stack_min, TheISA::PageBytes);
343            warn("Increasing stack size by one page.");
344        };
345        return true;
346    }
347    return false;
348}
349
350 // find all offsets for currently open files and save them
351void
352Process::fix_file_offsets() {
353    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
354    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
355    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
356    string in = fdo_stdin->filename;
357    string out = fdo_stdout->filename;
358
359    // initialize file descriptors to default: same as simulator
360    int stdin_fd, stdout_fd, stderr_fd;
361
362    if (in == "stdin" || in == "cin")
363        stdin_fd = STDIN_FILENO;
364    else if (in == "None")
365        stdin_fd = -1;
366    else{
367        //OPEN standard in and seek to the right location
368        stdin_fd = Process::openInputFile(in);
369        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
370            panic("Unable to seek to correct location in file: %s", in);
371    }
372
373    if (out == "stdout" || out == "cout")
374        stdout_fd = STDOUT_FILENO;
375    else if (out == "stderr" || out == "cerr")
376        stdout_fd = STDERR_FILENO;
377    else if (out == "None")
378        stdout_fd = -1;
379    else{
380        stdout_fd = Process::openOutputFile(out);
381        if (lseek(stdin_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
382            panic("Unable to seek to correct in file: %s", out);
383    }
384
385    stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO;
386
387    fdo_stdin->fd = stdin_fd;
388    fdo_stdout->fd = stdout_fd;
389    fdo_stderr->fd = stderr_fd;
390
391
392    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
393        Process::FdMap *fdo = &fd_map[free_fd];
394        if (fdo->fd != -1) {
395            if (fdo->isPipe){
396                if (fdo->filename == "PIPE-WRITE")
397                    continue;
398                else {
399                    assert (fdo->filename == "PIPE-READ");
400                    //create a new pipe
401                    int fds[2];
402                    int pipe_retval = pipe(fds);
403
404                    if (pipe_retval < 0) {
405                        // error
406                        panic("Unable to create new pipe.");
407                    }
408                    fdo->fd = fds[0]; //set read pipe
409                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
410                    if (fdo_write->filename != "PIPE-WRITE")
411                        panic ("Couldn't find write end of the pipe");
412
413                    fdo_write->fd = fds[1];//set write pipe
414               }
415            } else {
416                //Open file
417                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
418
419                if (fd == -1)
420                    panic("Unable to open file: %s", fdo->filename);
421                fdo->fd = fd;
422
423                //Seek to correct location before checkpoint
424                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
425                    panic("Unable to seek to correct location in file: %s", fdo->filename);
426            }
427        }
428    }
429}
430void
431Process::find_file_offsets(){
432    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
433        Process::FdMap *fdo = &fd_map[free_fd];
434        if (fdo->fd != -1) {
435            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
436        }  else {
437                fdo->filename = "NULL";
438                fdo->fileOffset = 0;
439        }
440    }
441}
442
443void
444Process::setReadPipeSource(int read_pipe_fd, int source_fd){
445    Process::FdMap *fdo = &fd_map[read_pipe_fd];
446    fdo->readPipeSource = source_fd;
447}
448
449void
450Process::FdMap::serialize(std::ostream &os)
451{
452    SERIALIZE_SCALAR(fd);
453    SERIALIZE_SCALAR(isPipe);
454    SERIALIZE_SCALAR(filename);
455    SERIALIZE_SCALAR(flags);
456    SERIALIZE_SCALAR(readPipeSource);
457    SERIALIZE_SCALAR(fileOffset);
458}
459
460void
461Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
462{
463    UNSERIALIZE_SCALAR(fd);
464    UNSERIALIZE_SCALAR(isPipe);
465    UNSERIALIZE_SCALAR(filename);
466    UNSERIALIZE_SCALAR(flags);
467    UNSERIALIZE_SCALAR(readPipeSource);
468    UNSERIALIZE_SCALAR(fileOffset);
469}
470
471void
472Process::serialize(std::ostream &os)
473{
474    SERIALIZE_SCALAR(initialContextLoaded);
475    SERIALIZE_SCALAR(brk_point);
476    SERIALIZE_SCALAR(stack_base);
477    SERIALIZE_SCALAR(stack_size);
478    SERIALIZE_SCALAR(stack_min);
479    SERIALIZE_SCALAR(next_thread_stack_base);
480    SERIALIZE_SCALAR(mmap_start);
481    SERIALIZE_SCALAR(mmap_end);
482    SERIALIZE_SCALAR(nxm_start);
483    SERIALIZE_SCALAR(nxm_end);
484    find_file_offsets();
485    pTable->serialize(os);
486    for (int x = 0; x <= MAX_FD; x++) {
487        nameOut(os, csprintf("%s.FdMap%d", name(), x));
488        fd_map[x].serialize(os);
489    }
490
491}
492
493void
494Process::unserialize(Checkpoint *cp, const std::string &section)
495{
496    UNSERIALIZE_SCALAR(initialContextLoaded);
497    UNSERIALIZE_SCALAR(brk_point);
498    UNSERIALIZE_SCALAR(stack_base);
499    UNSERIALIZE_SCALAR(stack_size);
500    UNSERIALIZE_SCALAR(stack_min);
501    UNSERIALIZE_SCALAR(next_thread_stack_base);
502    UNSERIALIZE_SCALAR(mmap_start);
503    UNSERIALIZE_SCALAR(mmap_end);
504    UNSERIALIZE_SCALAR(nxm_start);
505    UNSERIALIZE_SCALAR(nxm_end);
506    pTable->unserialize(cp, section);
507    for (int x = 0; x <= MAX_FD; x++) {
508        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
509     }
510    fix_file_offsets();
511
512    checkpointRestored = true;
513
514}
515
516
517////////////////////////////////////////////////////////////////////////
518//
519// LiveProcess member definitions
520//
521////////////////////////////////////////////////////////////////////////
522
523
524LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
525    : Process(params), objFile(_objFile),
526      argv(params->cmd), envp(params->env), cwd(params->cwd)
527{
528    __uid = params->uid;
529    __euid = params->euid;
530    __gid = params->gid;
531    __egid = params->egid;
532    __pid = params->pid;
533    __ppid = params->ppid;
534
535    prog_fname = params->cmd[0];
536
537    // load up symbols, if any... these may be used for debugging or
538    // profiling.
539    if (!debugSymbolTable) {
540        debugSymbolTable = new SymbolTable();
541        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
542            !objFile->loadLocalSymbols(debugSymbolTable)) {
543            // didn't load any symbols
544            delete debugSymbolTable;
545            debugSymbolTable = NULL;
546        }
547    }
548}
549
550void
551LiveProcess::argsInit(int intSize, int pageSize)
552{
553    Process::startup();
554
555    // load object file into target memory
556    objFile->loadSections(initVirtMem);
557
558    // Calculate how much space we need for arg & env arrays.
559    int argv_array_size = intSize * (argv.size() + 1);
560    int envp_array_size = intSize * (envp.size() + 1);
561    int arg_data_size = 0;
562    for (int i = 0; i < argv.size(); ++i) {
563        arg_data_size += argv[i].size() + 1;
564    }
565    int env_data_size = 0;
566    for (int i = 0; i < envp.size(); ++i) {
567        env_data_size += envp[i].size() + 1;
568    }
569
570    int space_needed =
571        argv_array_size + envp_array_size + arg_data_size + env_data_size;
572    if (space_needed < 32*1024)
573        space_needed = 32*1024;
574
575    // set bottom of stack
576    stack_min = stack_base - space_needed;
577    // align it
578    stack_min = roundDown(stack_min, pageSize);
579    stack_size = stack_base - stack_min;
580    // map memory
581    pTable->allocate(stack_min, roundUp(stack_size, pageSize));
582
583    // map out initial stack contents
584    Addr argv_array_base = stack_min + intSize; // room for argc
585    Addr envp_array_base = argv_array_base + argv_array_size;
586    Addr arg_data_base = envp_array_base + envp_array_size;
587    Addr env_data_base = arg_data_base + arg_data_size;
588
589    // write contents to stack
590    uint64_t argc = argv.size();
591    if (intSize == 8)
592        argc = htog((uint64_t)argc);
593    else if (intSize == 4)
594        argc = htog((uint32_t)argc);
595    else
596        panic("Unknown int size");
597
598    initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
599
600    copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
601    copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
602
603    assert(NumArgumentRegs >= 2);
604    threadContexts[0]->setIntReg(ArgumentReg[0], argc);
605    threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
606    threadContexts[0]->setIntReg(StackPointerReg, stack_min);
607
608    Addr prog_entry = objFile->entryPoint();
609    threadContexts[0]->setPC(prog_entry);
610    threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
611
612#if THE_ISA != ALPHA_ISA //e.g. MIPS or Sparc
613    threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
614#endif
615
616    num_processes++;
617}
618
619void
620LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
621{
622    num_syscalls++;
623
624    SyscallDesc *desc = getDesc(callnum);
625    if (desc == NULL)
626        fatal("Syscall %d out of range", callnum);
627
628    desc->doSyscall(callnum, this, tc);
629}
630
631LiveProcess *
632LiveProcess::create(LiveProcessParams * params)
633{
634    LiveProcess *process = NULL;
635
636    string executable =
637        params->executable == "" ? params->cmd[0] : params->executable;
638    ObjectFile *objFile = createObjectFile(executable);
639    if (objFile == NULL) {
640        fatal("Can't load object file %s", executable);
641    }
642
643    if (objFile->isDynamic())
644       fatal("Object file is a dynamic executable however only static "
645             "executables are supported!\n       Please recompile your "
646             "executable as a static binary and try again.\n");
647
648#if THE_ISA == ALPHA_ISA
649    if (objFile->hasTLS())
650        fatal("Object file has a TLS section and single threaded TLS is not\n"
651              "       currently supported for Alpha! Please recompile your "
652              "executable with \n       a non-TLS toolchain.\n");
653
654    if (objFile->getArch() != ObjectFile::Alpha)
655        fatal("Object file architecture does not match compiled ISA (Alpha).");
656    switch (objFile->getOpSys()) {
657      case ObjectFile::Tru64:
658        process = new AlphaTru64Process(params, objFile);
659        break;
660
661      case ObjectFile::Linux:
662        process = new AlphaLinuxProcess(params, objFile);
663        break;
664
665      default:
666        fatal("Unknown/unsupported operating system.");
667    }
668#elif THE_ISA == SPARC_ISA
669    if (objFile->getArch() != ObjectFile::SPARC64 && objFile->getArch() != ObjectFile::SPARC32)
670        fatal("Object file architecture does not match compiled ISA (SPARC).");
671    switch (objFile->getOpSys()) {
672      case ObjectFile::Linux:
673        if (objFile->getArch() == ObjectFile::SPARC64) {
674            process = new Sparc64LinuxProcess(params, objFile);
675        } else {
676            process = new Sparc32LinuxProcess(params, objFile);
677        }
678        break;
679
680
681      case ObjectFile::Solaris:
682        process = new SparcSolarisProcess(params, objFile);
683        break;
684      default:
685        fatal("Unknown/unsupported operating system.");
686    }
687#elif THE_ISA == X86_ISA
688    if (objFile->getArch() != ObjectFile::X86)
689        fatal("Object file architecture does not match compiled ISA (x86).");
690    switch (objFile->getOpSys()) {
691      case ObjectFile::Linux:
692        process = new X86LinuxProcess(params, objFile);
693        break;
694      default:
695        fatal("Unknown/unsupported operating system.");
696    }
697#elif THE_ISA == MIPS_ISA
698    if (objFile->getArch() != ObjectFile::Mips)
699        fatal("Object file architecture does not match compiled ISA (MIPS).");
700    switch (objFile->getOpSys()) {
701      case ObjectFile::Linux:
702        process = new MipsLinuxProcess(params, objFile);
703        break;
704
705      default:
706        fatal("Unknown/unsupported operating system.");
707    }
708#elif THE_ISA == ARM_ISA
709    if (objFile->getArch() != ObjectFile::Arm)
710        fatal("Object file architecture does not match compiled ISA (ARM).");
711    switch (objFile->getOpSys()) {
712      case ObjectFile::Linux:
713        process = new ArmLinuxProcess(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