process.cc revision 5335 
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/process.hh"
50#include "sim/process_impl.hh"
51#include "sim/stats.hh"
52#include "sim/syscall_emul.hh"
53#include "sim/system.hh"
54
55#include "arch/isa_specific.hh"
56#if THE_ISA == ALPHA_ISA
57#include "arch/alpha/linux/process.hh"
58#include "arch/alpha/tru64/process.hh"
59#elif THE_ISA == SPARC_ISA
60#include "arch/sparc/linux/process.hh"
61#include "arch/sparc/solaris/process.hh"
62#elif THE_ISA == MIPS_ISA
63#include "arch/mips/linux/process.hh"
64#elif THE_ISA == ARM_ISA
65#include "arch/arm/linux/process.hh"
66#elif THE_ISA == X86_ISA
67#include "arch/x86/linux/process.hh"
68#else
69#error "THE_ISA not set"
70#endif
71
72
73using namespace std;
74using namespace TheISA;
75
76//
77// The purpose of this code is to fake the loader & syscall mechanism
78// when there's no OS: thus there's no resone to use it in FULL_SYSTEM
79// mode when we do have an OS
80//
81#if FULL_SYSTEM
82#error "process.cc not compatible with FULL_SYSTEM"
83#endif
84
85// current number of allocated processes
86int num_processes = 0;
87
88Process::Process(ProcessParams * params)
89    : SimObject(params), system(params->system), checkpointRestored(false),
90    max_stack_size(params->max_stack_size)
91{
92    string in = params->input;
93    string out = params->output;
94
95    // initialize file descriptors to default: same as simulator
96    int stdin_fd, stdout_fd, stderr_fd;
97
98    if (in == "stdin" || in == "cin")
99        stdin_fd = STDIN_FILENO;
100    else if (in == "None")
101        stdin_fd = -1;
102    else
103        stdin_fd = Process::openInputFile(in);
104
105    if (out == "stdout" || out == "cout")
106        stdout_fd = STDOUT_FILENO;
107    else if (out == "stderr" || out == "cerr")
108        stdout_fd = STDERR_FILENO;
109    else if (out == "None")
110        stdout_fd = -1;
111    else
112        stdout_fd = Process::openOutputFile(out);
113
114    stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO;
115
116    M5_pid = system->allocatePID();
117    // initialize first 3 fds (stdin, stdout, stderr)
118    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
119    fdo->fd = stdin_fd;
120    fdo->filename = in;
121    fdo->flags = O_RDONLY;
122    fdo->mode = -1;
123    fdo->fileOffset = 0;
124
125    fdo =  &fd_map[STDOUT_FILENO];
126    fdo->fd = stdout_fd;
127    fdo->filename = out;
128    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
129    fdo->mode = 0774;
130    fdo->fileOffset = 0;
131
132    fdo = &fd_map[STDERR_FILENO];
133    fdo->fd = stderr_fd;
134    fdo->filename = "STDERR";
135    fdo->flags = O_WRONLY;
136    fdo->mode = -1;
137    fdo->fileOffset = 0;
138
139
140    // mark remaining fds as free
141    for (int i = 3; i <= MAX_FD; ++i) {
142        Process::FdMap *fdo = &fd_map[i];
143        fdo->fd = -1;
144    }
145
146    mmap_start = mmap_end = 0;
147    nxm_start = nxm_end = 0;
148    pTable = new PageTable(this);
149    // other parameters will be initialized when the program is loaded
150}
151
152
153void
154Process::regStats()
155{
156    using namespace Stats;
157
158    num_syscalls
159        .name(name() + ".PROG:num_syscalls")
160        .desc("Number of system calls")
161        ;
162}
163
164//
165// static helper functions
166//
167int
168Process::openInputFile(const string &filename)
169{
170    int fd = open(filename.c_str(), O_RDONLY);
171
172    if (fd == -1) {
173        perror(NULL);
174        cerr << "unable to open \"" << filename << "\" for reading\n";
175        fatal("can't open input file");
176    }
177
178    return fd;
179}
180
181
182int
183Process::openOutputFile(const string &filename)
184{
185    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774);
186
187    if (fd == -1) {
188        perror(NULL);
189        cerr << "unable to open \"" << filename << "\" for writing\n";
190        fatal("can't open output file");
191    }
192
193    return fd;
194}
195
196
197int
198Process::registerThreadContext(ThreadContext *tc)
199{
200    // add to list
201    int myIndex = threadContexts.size();
202    threadContexts.push_back(tc);
203
204    RemoteGDB *rgdb = new RemoteGDB(system, tc);
205    GDBListener *gdbl = new GDBListener(rgdb, 7000 + myIndex);
206    gdbl->listen();
207    //gdbl->accept();
208
209    remoteGDB.push_back(rgdb);
210
211    // return CPU number to caller
212    return myIndex;
213}
214
215void
216Process::startup()
217{
218    if (threadContexts.empty())
219        fatal("Process %s is not associated with any CPUs!\n", name());
220
221    // first thread context for this process... initialize & enable
222    ThreadContext *tc = threadContexts[0];
223
224    // mark this context as active so it will start ticking.
225    tc->activate(0);
226
227    Port *mem_port;
228    mem_port = system->physmem->getPort("functional");
229    initVirtMem = new TranslatingPort("process init port", this,
230            TranslatingPort::Always);
231    mem_port->setPeer(initVirtMem);
232    initVirtMem->setPeer(mem_port);
233}
234
235void
236Process::replaceThreadContext(ThreadContext *tc, int tcIndex)
237{
238    if (tcIndex >= threadContexts.size()) {
239        panic("replaceThreadContext: bad tcIndex, %d >= %d\n",
240              tcIndex, threadContexts.size());
241    }
242
243    threadContexts[tcIndex] = tc;
244}
245
246// map simulator fd sim_fd to target fd tgt_fd
247void
248Process::dup_fd(int sim_fd, int tgt_fd)
249{
250    if (tgt_fd < 0 || tgt_fd > MAX_FD)
251        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
252
253    Process::FdMap *fdo = &fd_map[tgt_fd];
254    fdo->fd = sim_fd;
255}
256
257
258// generate new target fd for sim_fd
259int
260Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
261{
262    // in case open() returns an error, don't allocate a new fd
263    if (sim_fd == -1)
264        return -1;
265
266    // find first free target fd
267    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
268        Process::FdMap *fdo = &fd_map[free_fd];
269        if (fdo->fd == -1) {
270            fdo->fd = sim_fd;
271            fdo->filename = filename;
272            fdo->mode = mode;
273            fdo->fileOffset = 0;
274            fdo->flags = flags;
275            fdo->isPipe = pipe;
276            fdo->readPipeSource = 0;
277            return free_fd;
278        }
279    }
280
281    panic("Process::alloc_fd: out of file descriptors!");
282}
283
284
285// free target fd (e.g., after close)
286void
287Process::free_fd(int tgt_fd)
288{
289    Process::FdMap *fdo = &fd_map[tgt_fd];
290    if (fdo->fd == -1)
291        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
292
293    fdo->fd = -1;
294    fdo->filename = "NULL";
295    fdo->mode = 0;
296    fdo->fileOffset = 0;
297    fdo->flags = 0;
298    fdo->isPipe = false;
299    fdo->readPipeSource = 0;
300}
301
302
303// look up simulator fd for given target fd
304int
305Process::sim_fd(int tgt_fd)
306{
307    if (tgt_fd > MAX_FD)
308        return -1;
309
310    return fd_map[tgt_fd].fd;
311}
312
313Process::FdMap *
314Process::sim_fd_obj(int tgt_fd)
315{
316    if (tgt_fd > MAX_FD)
317        panic("sim_fd_obj called in fd out of range.");
318
319    return &fd_map[tgt_fd];
320}
321bool
322Process::checkAndAllocNextPage(Addr vaddr)
323{
324    // if this is an initial write we might not have
325    if (vaddr >= stack_min && vaddr < stack_base) {
326        pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
327        return true;
328    }
329
330    // We've accessed the next page of the stack, so extend the stack
331    // to cover it.
332    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
333        while (vaddr < stack_min) {
334            stack_min -= TheISA::PageBytes;
335            if(stack_base - stack_min > max_stack_size)
336                fatal("Maximum stack size exceeded\n");
337            if(stack_base - stack_min > 8*1024*1024)
338                fatal("Over max stack size for one thread\n");
339            pTable->allocate(stack_min, TheISA::PageBytes);
340            warn("Increasing stack size by one page.");
341        };
342        return true;
343    }
344    return false;
345}
346
347 // find all offsets for currently open files and save them
348void
349Process::fix_file_offsets() {
350    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
351    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
352    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
353    string in = fdo_stdin->filename;
354    string out = fdo_stdout->filename;
355
356    // initialize file descriptors to default: same as simulator
357    int stdin_fd, stdout_fd, stderr_fd;
358
359    if (in == "stdin" || in == "cin")
360        stdin_fd = STDIN_FILENO;
361    else if (in == "None")
362        stdin_fd = -1;
363    else{
364        //OPEN standard in and seek to the right location
365        stdin_fd = Process::openInputFile(in);
366        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
367            panic("Unable to seek to correct location in file: %s", in);
368    }
369
370    if (out == "stdout" || out == "cout")
371        stdout_fd = STDOUT_FILENO;
372    else if (out == "stderr" || out == "cerr")
373        stdout_fd = STDERR_FILENO;
374    else if (out == "None")
375        stdout_fd = -1;
376    else{
377        stdout_fd = Process::openOutputFile(out);
378        if (lseek(stdin_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
379            panic("Unable to seek to correct in file: %s", out);
380    }
381
382    stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO;
383
384    fdo_stdin->fd = stdin_fd;
385    fdo_stdout->fd = stdout_fd;
386    fdo_stderr->fd = stderr_fd;
387
388
389    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
390        Process::FdMap *fdo = &fd_map[free_fd];
391        if (fdo->fd != -1) {
392            if (fdo->isPipe){
393                if (fdo->filename == "PIPE-WRITE")
394                    continue;
395                else {
396                    assert (fdo->filename == "PIPE-READ");
397                    //create a new pipe
398                    int fds[2];
399                    int pipe_retval = pipe(fds);
400
401                    if (pipe_retval < 0) {
402                        // error
403                        panic("Unable to create new pipe.");
404                    }
405                    fdo->fd = fds[0]; //set read pipe
406                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
407                    if (fdo_write->filename != "PIPE-WRITE")
408                        panic ("Couldn't find write end of the pipe");
409
410                    fdo_write->fd = fds[1];//set write pipe
411               }
412            } else {
413                //Open file
414                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
415
416                if (fd == -1)
417                    panic("Unable to open file: %s", fdo->filename);
418                fdo->fd = fd;
419
420                //Seek to correct location before checkpoint
421                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
422                    panic("Unable to seek to correct location in file: %s", fdo->filename);
423            }
424        }
425    }
426}
427void
428Process::find_file_offsets(){
429    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
430        Process::FdMap *fdo = &fd_map[free_fd];
431        if (fdo->fd != -1) {
432            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
433        }  else {
434                fdo->filename = "NULL";
435                fdo->fileOffset = 0;
436        }
437    }
438}
439
440void
441Process::setReadPipeSource(int read_pipe_fd, int source_fd){
442    Process::FdMap *fdo = &fd_map[read_pipe_fd];
443    fdo->readPipeSource = source_fd;
444}
445
446void
447Process::FdMap::serialize(std::ostream &os)
448{
449    SERIALIZE_SCALAR(fd);
450    SERIALIZE_SCALAR(isPipe);
451    SERIALIZE_SCALAR(filename);
452    SERIALIZE_SCALAR(flags);
453    SERIALIZE_SCALAR(readPipeSource);
454    SERIALIZE_SCALAR(fileOffset);
455}
456
457void
458Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
459{
460    UNSERIALIZE_SCALAR(fd);
461    UNSERIALIZE_SCALAR(isPipe);
462    UNSERIALIZE_SCALAR(filename);
463    UNSERIALIZE_SCALAR(flags);
464    UNSERIALIZE_SCALAR(readPipeSource);
465    UNSERIALIZE_SCALAR(fileOffset);
466}
467
468void
469Process::serialize(std::ostream &os)
470{
471    SERIALIZE_SCALAR(initialContextLoaded);
472    SERIALIZE_SCALAR(brk_point);
473    SERIALIZE_SCALAR(stack_base);
474    SERIALIZE_SCALAR(stack_size);
475    SERIALIZE_SCALAR(stack_min);
476    SERIALIZE_SCALAR(next_thread_stack_base);
477    SERIALIZE_SCALAR(mmap_start);
478    SERIALIZE_SCALAR(mmap_end);
479    SERIALIZE_SCALAR(nxm_start);
480    SERIALIZE_SCALAR(nxm_end);
481    find_file_offsets();
482    pTable->serialize(os);
483    for (int x = 0; x <= MAX_FD; x++) {
484        nameOut(os, csprintf("%s.FdMap%d", name(), x));
485        fd_map[x].serialize(os);
486    }
487
488}
489
490void
491Process::unserialize(Checkpoint *cp, const std::string &section)
492{
493    UNSERIALIZE_SCALAR(initialContextLoaded);
494    UNSERIALIZE_SCALAR(brk_point);
495    UNSERIALIZE_SCALAR(stack_base);
496    UNSERIALIZE_SCALAR(stack_size);
497    UNSERIALIZE_SCALAR(stack_min);
498    UNSERIALIZE_SCALAR(next_thread_stack_base);
499    UNSERIALIZE_SCALAR(mmap_start);
500    UNSERIALIZE_SCALAR(mmap_end);
501    UNSERIALIZE_SCALAR(nxm_start);
502    UNSERIALIZE_SCALAR(nxm_end);
503    pTable->unserialize(cp, section);
504    for (int x = 0; x <= MAX_FD; x++) {
505        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
506     }
507    fix_file_offsets();
508
509    checkpointRestored = true;
510
511}
512
513
514////////////////////////////////////////////////////////////////////////
515//
516// LiveProcess member definitions
517//
518////////////////////////////////////////////////////////////////////////
519
520
521LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
522    : Process(params), objFile(_objFile),
523      argv(params->cmd), envp(params->env), cwd(params->cwd)
524{
525    __uid = params->uid;
526    __euid = params->euid;
527    __gid = params->gid;
528    __egid = params->egid;
529    __pid = params->pid;
530    __ppid = params->ppid;
531
532    prog_fname = params->cmd[0];
533
534    // load up symbols, if any... these may be used for debugging or
535    // profiling.
536    if (!debugSymbolTable) {
537        debugSymbolTable = new SymbolTable();
538        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
539            !objFile->loadLocalSymbols(debugSymbolTable)) {
540            // didn't load any symbols
541            delete debugSymbolTable;
542            debugSymbolTable = NULL;
543        }
544    }
545}
546
547void
548LiveProcess::argsInit(int intSize, int pageSize)
549{
550    Process::startup();
551
552    // load object file into target memory
553    objFile->loadSections(initVirtMem);
554
555    // Calculate how much space we need for arg & env arrays.
556    int argv_array_size = intSize * (argv.size() + 1);
557    int envp_array_size = intSize * (envp.size() + 1);
558    int arg_data_size = 0;
559    for (int i = 0; i < argv.size(); ++i) {
560        arg_data_size += argv[i].size() + 1;
561    }
562    int env_data_size = 0;
563    for (int i = 0; i < envp.size(); ++i) {
564        env_data_size += envp[i].size() + 1;
565    }
566
567    int space_needed =
568        argv_array_size + envp_array_size + arg_data_size + env_data_size;
569    if (space_needed < 32*1024)
570        space_needed = 32*1024;
571
572    // set bottom of stack
573    stack_min = stack_base - space_needed;
574    // align it
575    stack_min = roundDown(stack_min, pageSize);
576    stack_size = stack_base - stack_min;
577    // map memory
578    pTable->allocate(stack_min, roundUp(stack_size, pageSize));
579
580    // map out initial stack contents
581    Addr argv_array_base = stack_min + intSize; // room for argc
582    Addr envp_array_base = argv_array_base + argv_array_size;
583    Addr arg_data_base = envp_array_base + envp_array_size;
584    Addr env_data_base = arg_data_base + arg_data_size;
585
586    // write contents to stack
587    uint64_t argc = argv.size();
588    if (intSize == 8)
589        argc = htog((uint64_t)argc);
590    else if (intSize == 4)
591        argc = htog((uint32_t)argc);
592    else
593        panic("Unknown int size");
594
595    initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
596
597    copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
598    copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
599
600    assert(NumArgumentRegs >= 2);
601    threadContexts[0]->setIntReg(ArgumentReg[0], argc);
602    threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
603    threadContexts[0]->setIntReg(StackPointerReg, stack_min);
604
605    Addr prog_entry = objFile->entryPoint();
606    threadContexts[0]->setPC(prog_entry);
607    threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
608
609#if THE_ISA != ALPHA_ISA //e.g. MIPS or Sparc
610    threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
611#endif
612
613    num_processes++;
614}
615
616void
617LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
618{
619    num_syscalls++;
620
621    SyscallDesc *desc = getDesc(callnum);
622    if (desc == NULL)
623        fatal("Syscall %d out of range", callnum);
624
625    desc->doSyscall(callnum, this, tc);
626}
627
628LiveProcess *
629LiveProcess::create(LiveProcessParams * params)
630{
631    LiveProcess *process = NULL;
632
633    string executable =
634        params->executable == "" ? params->cmd[0] : params->executable;
635    ObjectFile *objFile = createObjectFile(executable);
636    if (objFile == NULL) {
637        fatal("Can't load object file %s", executable);
638    }
639
640    if (objFile->isDynamic())
641       fatal("Object file is a dynamic executable however only static "
642             "executables are supported!\n       Please recompile your "
643             "executable as a static binary and try again.\n");
644
645#if THE_ISA == ALPHA_ISA
646    if (objFile->hasTLS())
647        fatal("Object file has a TLS section and single threaded TLS is not\n"
648              "       currently supported for Alpha! Please recompile your "
649              "executable with \n       a non-TLS toolchain.\n");
650
651    if (objFile->getArch() != ObjectFile::Alpha)
652        fatal("Object file architecture does not match compiled ISA (Alpha).");
653    switch (objFile->getOpSys()) {
654      case ObjectFile::Tru64:
655        process = new AlphaTru64Process(params, objFile);
656        break;
657
658      case ObjectFile::Linux:
659        process = new AlphaLinuxProcess(params, objFile);
660        break;
661
662      default:
663        fatal("Unknown/unsupported operating system.");
664    }
665#elif THE_ISA == SPARC_ISA
666    if (objFile->getArch() != ObjectFile::SPARC64 && objFile->getArch() != ObjectFile::SPARC32)
667        fatal("Object file architecture does not match compiled ISA (SPARC).");
668    switch (objFile->getOpSys()) {
669      case ObjectFile::Linux:
670        if (objFile->getArch() == ObjectFile::SPARC64) {
671            process = new Sparc64LinuxProcess(params, objFile);
672        } else {
673            process = new Sparc32LinuxProcess(params, objFile);
674        }
675        break;
676
677
678      case ObjectFile::Solaris:
679        process = new SparcSolarisProcess(params, objFile);
680        break;
681      default:
682        fatal("Unknown/unsupported operating system.");
683    }
684#elif THE_ISA == X86_ISA
685    if (objFile->getArch() != ObjectFile::X86)
686        fatal("Object file architecture does not match compiled ISA (x86).");
687    switch (objFile->getOpSys()) {
688      case ObjectFile::Linux:
689        process = new X86LinuxProcess(params, objFile);
690        break;
691      default:
692        fatal("Unknown/unsupported operating system.");
693    }
694#elif THE_ISA == MIPS_ISA
695    if (objFile->getArch() != ObjectFile::Mips)
696        fatal("Object file architecture does not match compiled ISA (MIPS).");
697    switch (objFile->getOpSys()) {
698      case ObjectFile::Linux:
699        process = new MipsLinuxProcess(params, objFile);
700        break;
701
702      default:
703        fatal("Unknown/unsupported operating system.");
704    }
705#elif THE_ISA == ARM_ISA
706    if (objFile->getArch() != ObjectFile::Arm)
707        fatal("Object file architecture does not match compiled ISA (ARM).");
708    switch (objFile->getOpSys()) {
709      case ObjectFile::Linux:
710        process = new ArmLinuxProcess(params, objFile);
711        break;
712
713      default:
714        fatal("Unknown/unsupported operating system.");
715    }
716#else
717#error "THE_ISA not set"
718#endif
719
720
721    if (process == NULL)
722        fatal("Unknown error creating process object.");
723    return process;
724}
725
726LiveProcess *
727LiveProcessParams::create()
728{
729    return LiveProcess::create(this);
730}
731