process.cc revision 6658:f4de76601762 
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 "config/the_isa.hh"
44#include "cpu/thread_context.hh"
45#include "mem/page_table.hh"
46#include "mem/physical.hh"
47#include "mem/translating_port.hh"
48#include "params/Process.hh"
49#include "params/LiveProcess.hh"
50#include "sim/debug.hh"
51#include "sim/process.hh"
52#include "sim/process_impl.hh"
53#include "sim/stats.hh"
54#include "sim/syscall_emul.hh"
55#include "sim/system.hh"
56
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
89template<class IntType>
90AuxVector<IntType>::AuxVector(IntType type, IntType val)
91{
92    a_type = TheISA::htog(type);
93    a_val = TheISA::htog(val);
94}
95
96template class AuxVector<uint32_t>;
97template class AuxVector<uint64_t>;
98
99Process::Process(ProcessParams * params)
100    : SimObject(params), system(params->system), checkpointRestored(false),
101    max_stack_size(params->max_stack_size)
102{
103    string in = params->input;
104    string out = params->output;
105    string err = params->errout;
106
107    // initialize file descriptors to default: same as simulator
108    int stdin_fd, stdout_fd, stderr_fd;
109
110    if (in == "stdin" || in == "cin")
111        stdin_fd = STDIN_FILENO;
112    else if (in == "None")
113        stdin_fd = -1;
114    else
115        stdin_fd = Process::openInputFile(in);
116
117    if (out == "stdout" || out == "cout")
118        stdout_fd = STDOUT_FILENO;
119    else if (out == "stderr" || out == "cerr")
120        stdout_fd = STDERR_FILENO;
121    else if (out == "None")
122        stdout_fd = -1;
123    else
124        stdout_fd = Process::openOutputFile(out);
125
126    if (err == "stdout" || err == "cout")
127        stderr_fd = STDOUT_FILENO;
128    else if (err == "stderr" || err == "cerr")
129        stderr_fd = STDERR_FILENO;
130    else if (err == "None")
131        stderr_fd = -1;
132    else if (err == out)
133        stderr_fd = stdout_fd;
134    else
135        stderr_fd = Process::openOutputFile(err);
136
137    M5_pid = system->allocatePID();
138    // initialize first 3 fds (stdin, stdout, stderr)
139    Process::FdMap *fdo = &fd_map[STDIN_FILENO];
140    fdo->fd = stdin_fd;
141    fdo->filename = in;
142    fdo->flags = O_RDONLY;
143    fdo->mode = -1;
144    fdo->fileOffset = 0;
145
146    fdo =  &fd_map[STDOUT_FILENO];
147    fdo->fd = stdout_fd;
148    fdo->filename = out;
149    fdo->flags =  O_WRONLY | O_CREAT | O_TRUNC;
150    fdo->mode = 0774;
151    fdo->fileOffset = 0;
152
153    fdo = &fd_map[STDERR_FILENO];
154    fdo->fd = stderr_fd;
155    fdo->filename = err;
156    fdo->flags = O_WRONLY;
157    fdo->mode = -1;
158    fdo->fileOffset = 0;
159
160
161    // mark remaining fds as free
162    for (int i = 3; i <= MAX_FD; ++i) {
163        Process::FdMap *fdo = &fd_map[i];
164        fdo->fd = -1;
165    }
166
167    mmap_start = mmap_end = 0;
168    nxm_start = nxm_end = 0;
169    pTable = new PageTable(this);
170    // other parameters will be initialized when the program is loaded
171}
172
173
174void
175Process::regStats()
176{
177    using namespace Stats;
178
179    num_syscalls
180        .name(name() + ".PROG:num_syscalls")
181        .desc("Number of system calls")
182        ;
183}
184
185//
186// static helper functions
187//
188int
189Process::openInputFile(const string &filename)
190{
191    int fd = open(filename.c_str(), O_RDONLY);
192
193    if (fd == -1) {
194        perror(NULL);
195        cerr << "unable to open \"" << filename << "\" for reading\n";
196        fatal("can't open input file");
197    }
198
199    return fd;
200}
201
202
203int
204Process::openOutputFile(const string &filename)
205{
206    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
207
208    if (fd == -1) {
209        perror(NULL);
210        cerr << "unable to open \"" << filename << "\" for writing\n";
211        fatal("can't open output file");
212    }
213
214    return fd;
215}
216
217ThreadContext *
218Process::findFreeContext()
219{
220    int size = contextIds.size();
221    ThreadContext *tc;
222    for (int i = 0; i < size; ++i) {
223        tc = system->getThreadContext(contextIds[i]);
224        if (tc->status() == ThreadContext::Halted) {
225            // inactive context, free to use
226            return tc;
227        }
228    }
229    return NULL;
230}
231
232void
233Process::startup()
234{
235    if (contextIds.empty())
236        fatal("Process %s is not associated with any HW contexts!\n", name());
237
238    // first thread context for this process... initialize & enable
239    ThreadContext *tc = system->getThreadContext(contextIds[0]);
240
241    // mark this context as active so it will start ticking.
242    tc->activate(0);
243
244    Port *mem_port;
245    mem_port = system->physmem->getPort("functional");
246    initVirtMem = new TranslatingPort("process init port", this,
247            TranslatingPort::Always);
248    mem_port->setPeer(initVirtMem);
249    initVirtMem->setPeer(mem_port);
250}
251
252// map simulator fd sim_fd to target fd tgt_fd
253void
254Process::dup_fd(int sim_fd, int tgt_fd)
255{
256    if (tgt_fd < 0 || tgt_fd > MAX_FD)
257        panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
258
259    Process::FdMap *fdo = &fd_map[tgt_fd];
260    fdo->fd = sim_fd;
261}
262
263
264// generate new target fd for sim_fd
265int
266Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
267{
268    // in case open() returns an error, don't allocate a new fd
269    if (sim_fd == -1)
270        return -1;
271
272    // find first free target fd
273    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
274        Process::FdMap *fdo = &fd_map[free_fd];
275        if (fdo->fd == -1) {
276            fdo->fd = sim_fd;
277            fdo->filename = filename;
278            fdo->mode = mode;
279            fdo->fileOffset = 0;
280            fdo->flags = flags;
281            fdo->isPipe = pipe;
282            fdo->readPipeSource = 0;
283            return free_fd;
284        }
285    }
286
287    panic("Process::alloc_fd: out of file descriptors!");
288}
289
290
291// free target fd (e.g., after close)
292void
293Process::free_fd(int tgt_fd)
294{
295    Process::FdMap *fdo = &fd_map[tgt_fd];
296    if (fdo->fd == -1)
297        warn("Process::free_fd: request to free unused fd %d", tgt_fd);
298
299    fdo->fd = -1;
300    fdo->filename = "NULL";
301    fdo->mode = 0;
302    fdo->fileOffset = 0;
303    fdo->flags = 0;
304    fdo->isPipe = false;
305    fdo->readPipeSource = 0;
306}
307
308
309// look up simulator fd for given target fd
310int
311Process::sim_fd(int tgt_fd)
312{
313    if (tgt_fd > MAX_FD)
314        return -1;
315
316    return fd_map[tgt_fd].fd;
317}
318
319Process::FdMap *
320Process::sim_fd_obj(int tgt_fd)
321{
322    if (tgt_fd > MAX_FD)
323        panic("sim_fd_obj called in fd out of range.");
324
325    return &fd_map[tgt_fd];
326}
327bool
328Process::checkAndAllocNextPage(Addr vaddr)
329{
330    // if this is an initial write we might not have
331    if (vaddr >= stack_min && vaddr < stack_base) {
332        pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
333        return true;
334    }
335
336    // We've accessed the next page of the stack, so extend the stack
337    // to cover it.
338    if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
339        while (vaddr < stack_min) {
340            stack_min -= TheISA::PageBytes;
341            if(stack_base - stack_min > max_stack_size)
342                fatal("Maximum stack size exceeded\n");
343            if(stack_base - stack_min > 8*1024*1024)
344                fatal("Over max stack size for one thread\n");
345            pTable->allocate(stack_min, TheISA::PageBytes);
346            inform("Increasing stack size by one page.");
347        };
348        return true;
349    }
350    return false;
351}
352
353 // find all offsets for currently open files and save them
354void
355Process::fix_file_offsets() {
356    Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
357    Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
358    Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
359    string in = fdo_stdin->filename;
360    string out = fdo_stdout->filename;
361    string err = fdo_stderr->filename;
362
363    // initialize file descriptors to default: same as simulator
364    int stdin_fd, stdout_fd, stderr_fd;
365
366    if (in == "stdin" || in == "cin")
367        stdin_fd = STDIN_FILENO;
368    else if (in == "None")
369        stdin_fd = -1;
370    else{
371        //OPEN standard in and seek to the right location
372        stdin_fd = Process::openInputFile(in);
373        if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
374            panic("Unable to seek to correct location in file: %s", in);
375    }
376
377    if (out == "stdout" || out == "cout")
378        stdout_fd = STDOUT_FILENO;
379    else if (out == "stderr" || out == "cerr")
380        stdout_fd = STDERR_FILENO;
381    else if (out == "None")
382        stdout_fd = -1;
383    else{
384        stdout_fd = Process::openOutputFile(out);
385        if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
386            panic("Unable to seek to correct location in file: %s", out);
387    }
388
389    if (err == "stdout" || err == "cout")
390        stderr_fd = STDOUT_FILENO;
391    else if (err == "stderr" || err == "cerr")
392        stderr_fd = STDERR_FILENO;
393    else if (err == "None")
394        stderr_fd = -1;
395    else if (err == out)
396        stderr_fd = stdout_fd;
397    else {
398        stderr_fd = Process::openOutputFile(err);
399        if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
400            panic("Unable to seek to correct location in file: %s", err);
401    }
402
403    fdo_stdin->fd = stdin_fd;
404    fdo_stdout->fd = stdout_fd;
405    fdo_stderr->fd = stderr_fd;
406
407
408    for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
409        Process::FdMap *fdo = &fd_map[free_fd];
410        if (fdo->fd != -1) {
411            if (fdo->isPipe){
412                if (fdo->filename == "PIPE-WRITE")
413                    continue;
414                else {
415                    assert (fdo->filename == "PIPE-READ");
416                    //create a new pipe
417                    int fds[2];
418                    int pipe_retval = pipe(fds);
419
420                    if (pipe_retval < 0) {
421                        // error
422                        panic("Unable to create new pipe.");
423                    }
424                    fdo->fd = fds[0]; //set read pipe
425                    Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
426                    if (fdo_write->filename != "PIPE-WRITE")
427                        panic ("Couldn't find write end of the pipe");
428
429                    fdo_write->fd = fds[1];//set write pipe
430               }
431            } else {
432                //Open file
433                int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
434
435                if (fd == -1)
436                    panic("Unable to open file: %s", fdo->filename);
437                fdo->fd = fd;
438
439                //Seek to correct location before checkpoint
440                if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
441                    panic("Unable to seek to correct location in file: %s", fdo->filename);
442            }
443        }
444    }
445}
446void
447Process::find_file_offsets(){
448    for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
449        Process::FdMap *fdo = &fd_map[free_fd];
450        if (fdo->fd != -1) {
451            fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
452        }  else {
453                fdo->filename = "NULL";
454                fdo->fileOffset = 0;
455        }
456    }
457}
458
459void
460Process::setReadPipeSource(int read_pipe_fd, int source_fd){
461    Process::FdMap *fdo = &fd_map[read_pipe_fd];
462    fdo->readPipeSource = source_fd;
463}
464
465void
466Process::FdMap::serialize(std::ostream &os)
467{
468    SERIALIZE_SCALAR(fd);
469    SERIALIZE_SCALAR(isPipe);
470    SERIALIZE_SCALAR(filename);
471    SERIALIZE_SCALAR(flags);
472    SERIALIZE_SCALAR(readPipeSource);
473    SERIALIZE_SCALAR(fileOffset);
474}
475
476void
477Process::FdMap::unserialize(Checkpoint *cp, const std::string &section)
478{
479    UNSERIALIZE_SCALAR(fd);
480    UNSERIALIZE_SCALAR(isPipe);
481    UNSERIALIZE_SCALAR(filename);
482    UNSERIALIZE_SCALAR(flags);
483    UNSERIALIZE_SCALAR(readPipeSource);
484    UNSERIALIZE_SCALAR(fileOffset);
485}
486
487void
488Process::serialize(std::ostream &os)
489{
490    SERIALIZE_SCALAR(initialContextLoaded);
491    SERIALIZE_SCALAR(brk_point);
492    SERIALIZE_SCALAR(stack_base);
493    SERIALIZE_SCALAR(stack_size);
494    SERIALIZE_SCALAR(stack_min);
495    SERIALIZE_SCALAR(next_thread_stack_base);
496    SERIALIZE_SCALAR(mmap_start);
497    SERIALIZE_SCALAR(mmap_end);
498    SERIALIZE_SCALAR(nxm_start);
499    SERIALIZE_SCALAR(nxm_end);
500    find_file_offsets();
501    pTable->serialize(os);
502    for (int x = 0; x <= MAX_FD; x++) {
503        nameOut(os, csprintf("%s.FdMap%d", name(), x));
504        fd_map[x].serialize(os);
505    }
506
507}
508
509void
510Process::unserialize(Checkpoint *cp, const std::string &section)
511{
512    UNSERIALIZE_SCALAR(initialContextLoaded);
513    UNSERIALIZE_SCALAR(brk_point);
514    UNSERIALIZE_SCALAR(stack_base);
515    UNSERIALIZE_SCALAR(stack_size);
516    UNSERIALIZE_SCALAR(stack_min);
517    UNSERIALIZE_SCALAR(next_thread_stack_base);
518    UNSERIALIZE_SCALAR(mmap_start);
519    UNSERIALIZE_SCALAR(mmap_end);
520    UNSERIALIZE_SCALAR(nxm_start);
521    UNSERIALIZE_SCALAR(nxm_end);
522    pTable->unserialize(cp, section);
523    for (int x = 0; x <= MAX_FD; x++) {
524        fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
525     }
526    fix_file_offsets();
527
528    checkpointRestored = true;
529
530}
531
532
533////////////////////////////////////////////////////////////////////////
534//
535// LiveProcess member definitions
536//
537////////////////////////////////////////////////////////////////////////
538
539
540LiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile)
541    : Process(params), objFile(_objFile),
542      argv(params->cmd), envp(params->env), cwd(params->cwd)
543{
544    __uid = params->uid;
545    __euid = params->euid;
546    __gid = params->gid;
547    __egid = params->egid;
548    __pid = params->pid;
549    __ppid = params->ppid;
550
551    prog_fname = params->cmd[0];
552
553    // load up symbols, if any... these may be used for debugging or
554    // profiling.
555    if (!debugSymbolTable) {
556        debugSymbolTable = new SymbolTable();
557        if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
558            !objFile->loadLocalSymbols(debugSymbolTable)) {
559            // didn't load any symbols
560            delete debugSymbolTable;
561            debugSymbolTable = NULL;
562        }
563    }
564}
565
566void
567LiveProcess::argsInit(int intSize, int pageSize)
568{
569    Process::startup();
570
571    // load object file into target memory
572    objFile->loadSections(initVirtMem);
573
574    // Calculate how much space we need for arg & env arrays.
575    int argv_array_size = intSize * (argv.size() + 1);
576    int envp_array_size = intSize * (envp.size() + 1);
577    int arg_data_size = 0;
578    for (vector<string>::size_type i = 0; i < argv.size(); ++i) {
579        arg_data_size += argv[i].size() + 1;
580    }
581    int env_data_size = 0;
582    for (vector<string>::size_type i = 0; i < envp.size(); ++i) {
583        env_data_size += envp[i].size() + 1;
584    }
585
586    int space_needed =
587        argv_array_size + envp_array_size + arg_data_size + env_data_size;
588    if (space_needed < 32*1024)
589        space_needed = 32*1024;
590
591    // set bottom of stack
592    stack_min = stack_base - space_needed;
593    // align it
594    stack_min = roundDown(stack_min, pageSize);
595    stack_size = stack_base - stack_min;
596    // map memory
597    pTable->allocate(stack_min, roundUp(stack_size, pageSize));
598
599    // map out initial stack contents
600    Addr argv_array_base = stack_min + intSize; // room for argc
601    Addr envp_array_base = argv_array_base + argv_array_size;
602    Addr arg_data_base = envp_array_base + envp_array_size;
603    Addr env_data_base = arg_data_base + arg_data_size;
604
605    // write contents to stack
606    uint64_t argc = argv.size();
607    if (intSize == 8)
608        argc = htog((uint64_t)argc);
609    else if (intSize == 4)
610        argc = htog((uint32_t)argc);
611    else
612        panic("Unknown int size");
613
614    initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
615
616    copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
617    copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
618
619    ThreadContext *tc = system->getThreadContext(contextIds[0]);
620
621    setSyscallArg(tc, 0, argc);
622    setSyscallArg(tc, 1, argv_array_base);
623    tc->setIntReg(StackPointerReg, stack_min);
624
625    Addr prog_entry = objFile->entryPoint();
626    tc->setPC(prog_entry);
627    tc->setNextPC(prog_entry + sizeof(MachInst));
628
629#if THE_ISA != ALPHA_ISA //e.g. MIPS or Sparc
630    tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
631#endif
632
633    num_processes++;
634}
635
636void
637LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
638{
639    num_syscalls++;
640
641    SyscallDesc *desc = getDesc(callnum);
642    if (desc == NULL)
643        fatal("Syscall %d out of range", callnum);
644
645    desc->doSyscall(callnum, this, tc);
646}
647
648LiveProcess *
649LiveProcess::create(LiveProcessParams * params)
650{
651    LiveProcess *process = NULL;
652
653    string executable =
654        params->executable == "" ? params->cmd[0] : params->executable;
655    ObjectFile *objFile = createObjectFile(executable);
656    if (objFile == NULL) {
657        fatal("Can't load object file %s", executable);
658    }
659
660    if (objFile->isDynamic())
661       fatal("Object file is a dynamic executable however only static "
662             "executables are supported!\n       Please recompile your "
663             "executable as a static binary and try again.\n");
664
665#if THE_ISA == ALPHA_ISA
666    if (objFile->getArch() != ObjectFile::Alpha)
667        fatal("Object file architecture does not match compiled ISA (Alpha).");
668
669    switch (objFile->getOpSys()) {
670      case ObjectFile::Tru64:
671        process = new AlphaTru64Process(params, objFile);
672        break;
673
674      case ObjectFile::UnknownOpSys:
675        warn("Unknown operating system; assuming Linux.");
676        // fall through
677      case ObjectFile::Linux:
678        process = new AlphaLinuxProcess(params, objFile);
679        break;
680
681      default:
682        fatal("Unknown/unsupported operating system.");
683    }
684#elif THE_ISA == SPARC_ISA
685    if (objFile->getArch() != ObjectFile::SPARC64 &&
686        objFile->getArch() != ObjectFile::SPARC32)
687        fatal("Object file architecture does not match compiled ISA (SPARC).");
688    switch (objFile->getOpSys()) {
689      case ObjectFile::UnknownOpSys:
690        warn("Unknown operating system; assuming Linux.");
691        // fall through
692      case ObjectFile::Linux:
693        if (objFile->getArch() == ObjectFile::SPARC64) {
694            process = new Sparc64LinuxProcess(params, objFile);
695        } else {
696            process = new Sparc32LinuxProcess(params, objFile);
697        }
698        break;
699
700
701      case ObjectFile::Solaris:
702        process = new SparcSolarisProcess(params, objFile);
703        break;
704
705      default:
706        fatal("Unknown/unsupported operating system.");
707    }
708#elif THE_ISA == X86_ISA
709    if (objFile->getArch() != ObjectFile::X86_64 &&
710        objFile->getArch() != ObjectFile::I386)
711        fatal("Object file architecture does not match compiled ISA (x86).");
712    switch (objFile->getOpSys()) {
713      case ObjectFile::UnknownOpSys:
714        warn("Unknown operating system; assuming Linux.");
715        // fall through
716      case ObjectFile::Linux:
717        if (objFile->getArch() == ObjectFile::X86_64) {
718            process = new X86_64LinuxProcess(params, objFile);
719        } else {
720            process = new I386LinuxProcess(params, objFile);
721        }
722        break;
723
724      default:
725        fatal("Unknown/unsupported operating system.");
726    }
727#elif THE_ISA == MIPS_ISA
728    if (objFile->getArch() != ObjectFile::Mips)
729        fatal("Object file architecture does not match compiled ISA (MIPS).");
730    switch (objFile->getOpSys()) {
731      case ObjectFile::UnknownOpSys:
732        warn("Unknown operating system; assuming Linux.");
733        // fall through
734      case ObjectFile::Linux:
735        process = new MipsLinuxProcess(params, objFile);
736        break;
737
738      default:
739        fatal("Unknown/unsupported operating system.");
740    }
741#elif THE_ISA == ARM_ISA
742    if (objFile->getArch() != ObjectFile::Arm)
743        fatal("Object file architecture does not match compiled ISA (ARM).");
744    switch (objFile->getOpSys()) {
745      case ObjectFile::UnknownOpSys:
746        warn("Unknown operating system; assuming Linux.");
747        // fall through
748      case ObjectFile::Linux:
749        process = new ArmLinuxProcess(params, objFile);
750        break;
751      case ObjectFile::LinuxArmOABI:
752        fatal("M5 does not support ARM OABI binaries. Please recompile with an"
753              " EABI compiler.");
754      default:
755        fatal("Unknown/unsupported operating system.");
756    }
757#else
758#error "THE_ISA not set"
759#endif
760
761
762    if (process == NULL)
763        fatal("Unknown error creating process object.");
764    return process;
765}
766
767LiveProcess *
768LiveProcessParams::create()
769{
770    return LiveProcess::create(this);
771}
772