142
143/// Target exit() handler: terminate current context.
144SyscallReturn exitFunc(SyscallDesc *desc, int num,
145 LiveProcess *p, ThreadContext *tc);
146
147/// Target exit_group() handler: terminate simulation. (exit all threads)
148SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
149 LiveProcess *p, ThreadContext *tc);
150
151/// Target getpagesize() handler.
152SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
153 LiveProcess *p, ThreadContext *tc);
154
155/// Target brk() handler: set brk address.
156SyscallReturn brkFunc(SyscallDesc *desc, int num,
157 LiveProcess *p, ThreadContext *tc);
158
159/// Target close() handler.
160SyscallReturn closeFunc(SyscallDesc *desc, int num,
161 LiveProcess *p, ThreadContext *tc);
162
163/// Target read() handler.
164SyscallReturn readFunc(SyscallDesc *desc, int num,
165 LiveProcess *p, ThreadContext *tc);
166
167/// Target write() handler.
168SyscallReturn writeFunc(SyscallDesc *desc, int num,
169 LiveProcess *p, ThreadContext *tc);
170
171/// Target lseek() handler.
172SyscallReturn lseekFunc(SyscallDesc *desc, int num,
173 LiveProcess *p, ThreadContext *tc);
174
175/// Target _llseek() handler.
176SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
177 LiveProcess *p, ThreadContext *tc);
178
179/// Target munmap() handler.
180SyscallReturn munmapFunc(SyscallDesc *desc, int num,
181 LiveProcess *p, ThreadContext *tc);
182
183/// Target gethostname() handler.
184SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
185 LiveProcess *p, ThreadContext *tc);
186
187/// Target getcwd() handler.
188SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
189 LiveProcess *p, ThreadContext *tc);
190
191/// Target readlink() handler.
192SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
193 LiveProcess *p, ThreadContext *tc,
194 int index = 0);
195SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
196 LiveProcess *p, ThreadContext *tc);
197
198/// Target unlink() handler.
199SyscallReturn unlinkHelper(SyscallDesc *desc, int num,
200 LiveProcess *p, ThreadContext *tc,
201 int index);
202SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
203 LiveProcess *p, ThreadContext *tc);
204
205/// Target mkdir() handler.
206SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
207 LiveProcess *p, ThreadContext *tc);
208
209/// Target rename() handler.
210SyscallReturn renameFunc(SyscallDesc *desc, int num,
211 LiveProcess *p, ThreadContext *tc);
212
213
214/// Target truncate() handler.
215SyscallReturn truncateFunc(SyscallDesc *desc, int num,
216 LiveProcess *p, ThreadContext *tc);
217
218
219/// Target ftruncate() handler.
220SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
221 LiveProcess *p, ThreadContext *tc);
222
223
224/// Target truncate64() handler.
225SyscallReturn truncate64Func(SyscallDesc *desc, int num,
226 LiveProcess *p, ThreadContext *tc);
227
228/// Target ftruncate64() handler.
229SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
230 LiveProcess *p, ThreadContext *tc);
231
232
233/// Target umask() handler.
234SyscallReturn umaskFunc(SyscallDesc *desc, int num,
235 LiveProcess *p, ThreadContext *tc);
236
237
238/// Target chown() handler.
239SyscallReturn chownFunc(SyscallDesc *desc, int num,
240 LiveProcess *p, ThreadContext *tc);
241
242
243/// Target fchown() handler.
244SyscallReturn fchownFunc(SyscallDesc *desc, int num,
245 LiveProcess *p, ThreadContext *tc);
246
247/// Target dup() handler.
248SyscallReturn dupFunc(SyscallDesc *desc, int num,
249 LiveProcess *process, ThreadContext *tc);
250
251/// Target fnctl() handler.
252SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
253 LiveProcess *process, ThreadContext *tc);
254
255/// Target fcntl64() handler.
256SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
257 LiveProcess *process, ThreadContext *tc);
258
259/// Target setuid() handler.
260SyscallReturn setuidFunc(SyscallDesc *desc, int num,
261 LiveProcess *p, ThreadContext *tc);
262
263/// Target getpid() handler.
264SyscallReturn getpidFunc(SyscallDesc *desc, int num,
265 LiveProcess *p, ThreadContext *tc);
266
267/// Target getuid() handler.
268SyscallReturn getuidFunc(SyscallDesc *desc, int num,
269 LiveProcess *p, ThreadContext *tc);
270
271/// Target getgid() handler.
272SyscallReturn getgidFunc(SyscallDesc *desc, int num,
273 LiveProcess *p, ThreadContext *tc);
274
275/// Target getppid() handler.
276SyscallReturn getppidFunc(SyscallDesc *desc, int num,
277 LiveProcess *p, ThreadContext *tc);
278
279/// Target geteuid() handler.
280SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
281 LiveProcess *p, ThreadContext *tc);
282
283/// Target getegid() handler.
284SyscallReturn getegidFunc(SyscallDesc *desc, int num,
285 LiveProcess *p, ThreadContext *tc);
286
287/// Target clone() handler.
288SyscallReturn cloneFunc(SyscallDesc *desc, int num,
289 LiveProcess *p, ThreadContext *tc);
290
291/// Target access() handler
292SyscallReturn accessFunc(SyscallDesc *desc, int num,
293 LiveProcess *p, ThreadContext *tc);
294SyscallReturn accessFunc(SyscallDesc *desc, int num,
295 LiveProcess *p, ThreadContext *tc,
296 int index);
297
298/// Futex system call
299/// Implemented by Daniel Sanchez
300/// Used by printf's in multi-threaded apps
301template <class OS>
302SyscallReturn
303futexFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
304 ThreadContext *tc)
305{
306 int index_uaddr = 0;
307 int index_op = 1;
308 int index_val = 2;
309 int index_timeout = 3;
310
311 uint64_t uaddr = process->getSyscallArg(tc, index_uaddr);
312 int op = process->getSyscallArg(tc, index_op);
313 int val = process->getSyscallArg(tc, index_val);
314 uint64_t timeout = process->getSyscallArg(tc, index_timeout);
315
316 std::map<uint64_t, std::list<ThreadContext *> * >
317 &futex_map = tc->getSystemPtr()->futexMap;
318
319 DPRINTF(SyscallVerbose, "In sys_futex: Address=%llx, op=%d, val=%d\n",
320 uaddr, op, val);
321
322 op &= ~OS::TGT_FUTEX_PRIVATE_FLAG;
323
324 if (op == OS::TGT_FUTEX_WAIT) {
325 if (timeout != 0) {
326 warn("sys_futex: FUTEX_WAIT with non-null timeout unimplemented;"
327 "we'll wait indefinitely");
328 }
329
330 uint8_t *buf = new uint8_t[sizeof(int)];
331 tc->getMemProxy().readBlob((Addr)uaddr, buf, (int)sizeof(int));
332 int mem_val = *((int *)buf);
333 delete buf;
334
335 if(val != mem_val) {
336 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, read: %d, "
337 "expected: %d\n", mem_val, val);
338 return -OS::TGT_EWOULDBLOCK;
339 }
340
341 // Queue the thread context
342 std::list<ThreadContext *> * tcWaitList;
343 if (futex_map.count(uaddr)) {
344 tcWaitList = futex_map.find(uaddr)->second;
345 } else {
346 tcWaitList = new std::list<ThreadContext *>();
347 futex_map.insert(std::pair< uint64_t,
348 std::list<ThreadContext *> * >(uaddr, tcWaitList));
349 }
350 tcWaitList->push_back(tc);
351 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAIT, suspending calling "
352 "thread context\n");
353 tc->suspend();
354 return 0;
355 } else if (op == OS::TGT_FUTEX_WAKE){
356 int wokenUp = 0;
357 std::list<ThreadContext *> * tcWaitList;
358 if (futex_map.count(uaddr)) {
359 tcWaitList = futex_map.find(uaddr)->second;
360 while (tcWaitList->size() > 0 && wokenUp < val) {
361 tcWaitList->front()->activate();
362 tcWaitList->pop_front();
363 wokenUp++;
364 }
365 if(tcWaitList->empty()) {
366 futex_map.erase(uaddr);
367 delete tcWaitList;
368 }
369 }
370 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, activated %d waiting "
371 "thread contexts\n", wokenUp);
372 return wokenUp;
373 } else {
374 warn("sys_futex: op %d is not implemented, just returning...", op);
375 return 0;
376 }
377
378}
379
380
381/// Pseudo Funcs - These functions use a different return convension,
382/// returning a second value in a register other than the normal return register
383SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
384 LiveProcess *process, ThreadContext *tc);
385
386/// Target getpidPseudo() handler.
387SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
388 LiveProcess *p, ThreadContext *tc);
389
390/// Target getuidPseudo() handler.
391SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
392 LiveProcess *p, ThreadContext *tc);
393
394/// Target getgidPseudo() handler.
395SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
396 LiveProcess *p, ThreadContext *tc);
397
398
399/// A readable name for 1,000,000, for converting microseconds to seconds.
400const int one_million = 1000000;
401/// A readable name for 1,000,000,000, for converting nanoseconds to seconds.
402const int one_billion = 1000000000;
403
404/// Approximate seconds since the epoch (1/1/1970). About a billion,
405/// by my reckoning. We want to keep this a constant (not use the
406/// real-world time) to keep simulations repeatable.
407const unsigned seconds_since_epoch = 1000000000;
408
409/// Helper function to convert current elapsed time to seconds and
410/// microseconds.
411template <class T1, class T2>
412void
413getElapsedTimeMicro(T1 &sec, T2 &usec)
414{
415 uint64_t elapsed_usecs = curTick() / SimClock::Int::us;
416 sec = elapsed_usecs / one_million;
417 usec = elapsed_usecs % one_million;
418}
419
420/// Helper function to convert current elapsed time to seconds and
421/// nanoseconds.
422template <class T1, class T2>
423void
424getElapsedTimeNano(T1 &sec, T2 &nsec)
425{
426 uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns;
427 sec = elapsed_nsecs / one_billion;
428 nsec = elapsed_nsecs % one_billion;
429}
430
431//////////////////////////////////////////////////////////////////////
432//
433// The following emulation functions are generic, but need to be
434// templated to account for differences in types, constants, etc.
435//
436//////////////////////////////////////////////////////////////////////
437
438#if NO_STAT64
439 typedef struct stat hst_stat;
440 typedef struct stat hst_stat64;
441#else
442 typedef struct stat hst_stat;
443 typedef struct stat64 hst_stat64;
444#endif
445
446//// Helper function to convert a host stat buffer to a target stat
447//// buffer. Also copies the target buffer out to the simulated
448//// memory space. Used by stat(), fstat(), and lstat().
449
450template <typename target_stat, typename host_stat>
451static void
452convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
453{
454 using namespace TheISA;
455
456 if (fakeTTY)
457 tgt->st_dev = 0xA;
458 else
459 tgt->st_dev = host->st_dev;
460 tgt->st_dev = TheISA::htog(tgt->st_dev);
461 tgt->st_ino = host->st_ino;
462 tgt->st_ino = TheISA::htog(tgt->st_ino);
463 tgt->st_mode = host->st_mode;
464 if (fakeTTY) {
465 // Claim to be a character device
466 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
467 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
468 }
469 tgt->st_mode = TheISA::htog(tgt->st_mode);
470 tgt->st_nlink = host->st_nlink;
471 tgt->st_nlink = TheISA::htog(tgt->st_nlink);
472 tgt->st_uid = host->st_uid;
473 tgt->st_uid = TheISA::htog(tgt->st_uid);
474 tgt->st_gid = host->st_gid;
475 tgt->st_gid = TheISA::htog(tgt->st_gid);
476 if (fakeTTY)
477 tgt->st_rdev = 0x880d;
478 else
479 tgt->st_rdev = host->st_rdev;
480 tgt->st_rdev = TheISA::htog(tgt->st_rdev);
481 tgt->st_size = host->st_size;
482 tgt->st_size = TheISA::htog(tgt->st_size);
483 tgt->st_atimeX = host->st_atime;
484 tgt->st_atimeX = TheISA::htog(tgt->st_atimeX);
485 tgt->st_mtimeX = host->st_mtime;
486 tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX);
487 tgt->st_ctimeX = host->st_ctime;
488 tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX);
489 // Force the block size to be 8k. This helps to ensure buffered io works
490 // consistently across different hosts.
491 tgt->st_blksize = 0x2000;
492 tgt->st_blksize = TheISA::htog(tgt->st_blksize);
493 tgt->st_blocks = host->st_blocks;
494 tgt->st_blocks = TheISA::htog(tgt->st_blocks);
495}
496
497// Same for stat64
498
499template <typename target_stat, typename host_stat64>
500static void
501convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
502{
503 using namespace TheISA;
504
505 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
506#if defined(STAT_HAVE_NSEC)
507 tgt->st_atime_nsec = host->st_atime_nsec;
508 tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec);
509 tgt->st_mtime_nsec = host->st_mtime_nsec;
510 tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec);
511 tgt->st_ctime_nsec = host->st_ctime_nsec;
512 tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec);
513#else
514 tgt->st_atime_nsec = 0;
515 tgt->st_mtime_nsec = 0;
516 tgt->st_ctime_nsec = 0;
517#endif
518}
519
520//Here are a couple convenience functions
521template<class OS>
522static void
523copyOutStatBuf(SETranslatingPortProxy &mem, Addr addr,
524 hst_stat *host, bool fakeTTY = false)
525{
526 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
527 tgt_stat_buf tgt(addr);
528 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
529 tgt.copyOut(mem);
530}
531
532template<class OS>
533static void
534copyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr,
535 hst_stat64 *host, bool fakeTTY = false)
536{
537 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
538 tgt_stat_buf tgt(addr);
539 convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
540 tgt.copyOut(mem);
541}
542
543/// Target ioctl() handler. For the most part, programs call ioctl()
544/// only to find out if their stdout is a tty, to determine whether to
545/// do line or block buffering. We always claim that output fds are
546/// not TTYs to provide repeatable results.
547template <class OS>
548SyscallReturn
549ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
550 ThreadContext *tc)
551{
552 int index = 0;
553 int fd = process->getSyscallArg(tc, index);
554 unsigned req = process->getSyscallArg(tc, index);
555
556 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
557
558 Process::FdMap *fdObj = process->sim_fd_obj(fd);
559
560 if (fdObj == NULL) {
561 // doesn't map to any simulator fd: not a valid target fd
562 return -EBADF;
563 }
564
565 if (fdObj->driver != NULL) {
566 return fdObj->driver->ioctl(process, tc, req);
567 }
568
569 if (OS::isTtyReq(req)) {
570 return -ENOTTY;
571 }
572
573 warn("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ \n",
574 fd, req, tc->pcState());
575 return -ENOTTY;
576}
577
578template <class OS>
579static SyscallReturn
580openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
581 ThreadContext *tc, int index)
582{
583 std::string path;
584
585 if (!tc->getMemProxy().tryReadString(path,
586 process->getSyscallArg(tc, index)))
587 return -EFAULT;
588
589 int tgtFlags = process->getSyscallArg(tc, index);
590 int mode = process->getSyscallArg(tc, index);
591 int hostFlags = 0;
592
593 // translate open flags
594 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
595 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
596 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
597 hostFlags |= OS::openFlagTable[i].hostFlag;
598 }
599 }
600
601 // any target flags left?
602 if (tgtFlags != 0)
603 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
604
605#ifdef __CYGWIN32__
606 hostFlags |= O_BINARY;
607#endif
608
609 // Adjust path for current working directory
610 path = process->fullPath(path);
611
612 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
613
614 if (startswith(path, "/dev/")) {
615 std::string filename = path.substr(strlen("/dev/"));
616 if (filename == "sysdev0") {
617 // This is a memory-mapped high-resolution timer device on Alpha.
618 // We don't support it, so just punt.
619 warn("Ignoring open(%s, ...)\n", path);
620 return -ENOENT;
621 }
622
623 EmulatedDriver *drv = process->findDriver(filename);
624 if (drv != NULL) {
625 // the driver's open method will allocate a fd from the
626 // process if necessary.
627 return drv->open(process, tc, mode, hostFlags);
628 }
629
630 // fall through here for pass through to host devices, such as
631 // /dev/zero
632 }
633
634 int fd;
635 int local_errno;
636 if (startswith(path, "/proc/") || startswith(path, "/system/") ||
637 startswith(path, "/platform/") || startswith(path, "/sys/")) {
638 // It's a proc/sys entry and requires special handling
639 fd = OS::openSpecialFile(path, process, tc);
640 local_errno = ENOENT;
641 } else {
642 // open the file
643 fd = open(path.c_str(), hostFlags, mode);
644 local_errno = errno;
645 }
646
647 if (fd == -1)
648 return -local_errno;
649
650 return process->alloc_fd(fd, path.c_str(), hostFlags, mode, false);
651}
652
653/// Target open() handler.
654template <class OS>
655SyscallReturn
656openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
657 ThreadContext *tc)
658{
659 return openFunc<OS>(desc, callnum, process, tc, 0);
660}
661
662/// Target openat() handler.
663template <class OS>
664SyscallReturn
665openatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
666 ThreadContext *tc)
667{
668 int index = 0;
669 int dirfd = process->getSyscallArg(tc, index);
670 if (dirfd != OS::TGT_AT_FDCWD)
671 warn("openat: first argument not AT_FDCWD; unlikely to work");
672 return openFunc<OS>(desc, callnum, process, tc, 1);
673}
674
675/// Target unlinkat() handler.
676template <class OS>
677SyscallReturn
678unlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
679 ThreadContext *tc)
680{
681 int index = 0;
682 int dirfd = process->getSyscallArg(tc, index);
683 if (dirfd != OS::TGT_AT_FDCWD)
684 warn("unlinkat: first argument not AT_FDCWD; unlikely to work");
685
686 return unlinkHelper(desc, callnum, process, tc, 1);
687}
688
689/// Target facessat() handler
690template <class OS>
691SyscallReturn
692faccessatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
693 ThreadContext *tc)
694{
695 int index = 0;
696 int dirfd = process->getSyscallArg(tc, index);
697 if (dirfd != OS::TGT_AT_FDCWD)
698 warn("faccessat: first argument not AT_FDCWD; unlikely to work");
699 return accessFunc(desc, callnum, process, tc, 1);
700}
701
702/// Target readlinkat() handler
703template <class OS>
704SyscallReturn
705readlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
706 ThreadContext *tc)
707{
708 int index = 0;
709 int dirfd = process->getSyscallArg(tc, index);
710 if (dirfd != OS::TGT_AT_FDCWD)
711 warn("openat: first argument not AT_FDCWD; unlikely to work");
712 return readlinkFunc(desc, callnum, process, tc, 1);
713}
714
715/// Target sysinfo() handler.
716template <class OS>
717SyscallReturn
718sysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
719 ThreadContext *tc)
720{
721
722 int index = 0;
723 TypedBufferArg<typename OS::tgt_sysinfo>
724 sysinfo(process->getSyscallArg(tc, index));
725
726 sysinfo->uptime=seconds_since_epoch;
727 sysinfo->totalram=process->system->memSize();
728
729 sysinfo.copyOut(tc->getMemProxy());
730
731 return 0;
732}
733
734/// Target chmod() handler.
735template <class OS>
736SyscallReturn
737chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
738 ThreadContext *tc)
739{
740 std::string path;
741
742 int index = 0;
743 if (!tc->getMemProxy().tryReadString(path,
744 process->getSyscallArg(tc, index))) {
745 return -EFAULT;
746 }
747
748 uint32_t mode = process->getSyscallArg(tc, index);
749 mode_t hostMode = 0;
750
751 // XXX translate mode flags via OS::something???
752 hostMode = mode;
753
754 // Adjust path for current working directory
755 path = process->fullPath(path);
756
757 // do the chmod
758 int result = chmod(path.c_str(), hostMode);
759 if (result < 0)
760 return -errno;
761
762 return 0;
763}
764
765
766/// Target fchmod() handler.
767template <class OS>
768SyscallReturn
769fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
770 ThreadContext *tc)
771{
772 int index = 0;
773 int fd = process->getSyscallArg(tc, index);
774 if (fd < 0 || process->sim_fd(fd) < 0) {
775 // doesn't map to any simulator fd: not a valid target fd
776 return -EBADF;
777 }
778
779 uint32_t mode = process->getSyscallArg(tc, index);
780 mode_t hostMode = 0;
781
782 // XXX translate mode flags via OS::someting???
783 hostMode = mode;
784
785 // do the fchmod
786 int result = fchmod(process->sim_fd(fd), hostMode);
787 if (result < 0)
788 return -errno;
789
790 return 0;
791}
792
793/// Target mremap() handler.
794template <class OS>
795SyscallReturn
796mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
797{
798 int index = 0;
799 Addr start = process->getSyscallArg(tc, index);
800 uint64_t old_length = process->getSyscallArg(tc, index);
801 uint64_t new_length = process->getSyscallArg(tc, index);
802 uint64_t flags = process->getSyscallArg(tc, index);
803 uint64_t provided_address = 0;
804 bool use_provided_address = flags & OS::TGT_MREMAP_FIXED;
805
806 if (use_provided_address)
807 provided_address = process->getSyscallArg(tc, index);
808
809 if ((start % TheISA::PageBytes != 0) ||
810 (provided_address % TheISA::PageBytes != 0)) {
811 warn("mremap failing: arguments not page aligned");
812 return -EINVAL;
813 }
814
815 new_length = roundUp(new_length, TheISA::PageBytes);
816
817 if (new_length > old_length) {
818 if ((start + old_length) == process->mmap_end &&
819 (!use_provided_address || provided_address == start)) {
820 uint64_t diff = new_length - old_length;
821 process->allocateMem(process->mmap_end, diff);
822 process->mmap_end += diff;
823 return start;
824 } else {
825 if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) {
826 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
827 return -ENOMEM;
828 } else {
829 uint64_t new_start = use_provided_address ?
830 provided_address : process->mmap_end;
831 process->pTable->remap(start, old_length, new_start);
832 warn("mremapping to new vaddr %08p-%08p, adding %d\n",
833 new_start, new_start + new_length,
834 new_length - old_length);
835 // add on the remaining unallocated pages
836 process->allocateMem(new_start + old_length,
837 new_length - old_length,
838 use_provided_address /* clobber */);
839 if (!use_provided_address)
840 process->mmap_end += new_length;
841 if (use_provided_address &&
842 new_start + new_length > process->mmap_end) {
843 // something fishy going on here, at least notify the user
844 // @todo: increase mmap_end?
845 warn("mmap region limit exceeded with MREMAP_FIXED\n");
846 }
847 warn("returning %08p as start\n", new_start);
848 return new_start;
849 }
850 }
851 } else {
852 if (use_provided_address && provided_address != start)
853 process->pTable->remap(start, new_length, provided_address);
854 process->pTable->unmap(start + new_length, old_length - new_length);
855 return use_provided_address ? provided_address : start;
856 }
857}
858
859/// Target stat() handler.
860template <class OS>
861SyscallReturn
862statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
863 ThreadContext *tc)
864{
865 std::string path;
866
867 int index = 0;
868 if (!tc->getMemProxy().tryReadString(path,
869 process->getSyscallArg(tc, index))) {
870 return -EFAULT;
871 }
872 Addr bufPtr = process->getSyscallArg(tc, index);
873
874 // Adjust path for current working directory
875 path = process->fullPath(path);
876
877 struct stat hostBuf;
878 int result = stat(path.c_str(), &hostBuf);
879
880 if (result < 0)
881 return -errno;
882
883 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
884
885 return 0;
886}
887
888
889/// Target stat64() handler.
890template <class OS>
891SyscallReturn
892stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
893 ThreadContext *tc)
894{
895 std::string path;
896
897 int index = 0;
898 if (!tc->getMemProxy().tryReadString(path,
899 process->getSyscallArg(tc, index)))
900 return -EFAULT;
901 Addr bufPtr = process->getSyscallArg(tc, index);
902
903 // Adjust path for current working directory
904 path = process->fullPath(path);
905
906#if NO_STAT64
907 struct stat hostBuf;
908 int result = stat(path.c_str(), &hostBuf);
909#else
910 struct stat64 hostBuf;
911 int result = stat64(path.c_str(), &hostBuf);
912#endif
913
914 if (result < 0)
915 return -errno;
916
917 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
918
919 return 0;
920}
921
922
923/// Target fstatat64() handler.
924template <class OS>
925SyscallReturn
926fstatat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
927 ThreadContext *tc)
928{
929 int index = 0;
930 int dirfd = process->getSyscallArg(tc, index);
931 if (dirfd != OS::TGT_AT_FDCWD)
932 warn("fstatat64: first argument not AT_FDCWD; unlikely to work");
933
934 std::string path;
935 if (!tc->getMemProxy().tryReadString(path,
936 process->getSyscallArg(tc, index)))
937 return -EFAULT;
938 Addr bufPtr = process->getSyscallArg(tc, index);
939
940 // Adjust path for current working directory
941 path = process->fullPath(path);
942
943#if NO_STAT64
944 struct stat hostBuf;
945 int result = stat(path.c_str(), &hostBuf);
946#else
947 struct stat64 hostBuf;
948 int result = stat64(path.c_str(), &hostBuf);
949#endif
950
951 if (result < 0)
952 return -errno;
953
954 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
955
956 return 0;
957}
958
959
960/// Target fstat64() handler.
961template <class OS>
962SyscallReturn
963fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
964 ThreadContext *tc)
965{
966 int index = 0;
967 int fd = process->getSyscallArg(tc, index);
968 Addr bufPtr = process->getSyscallArg(tc, index);
969 if (fd < 0 || process->sim_fd(fd) < 0) {
970 // doesn't map to any simulator fd: not a valid target fd
971 return -EBADF;
972 }
973
974#if NO_STAT64
975 struct stat hostBuf;
976 int result = fstat(process->sim_fd(fd), &hostBuf);
977#else
978 struct stat64 hostBuf;
979 int result = fstat64(process->sim_fd(fd), &hostBuf);
980#endif
981
982 if (result < 0)
983 return -errno;
984
985 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (fd == 1));
986
987 return 0;
988}
989
990
991/// Target lstat() handler.
992template <class OS>
993SyscallReturn
994lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
995 ThreadContext *tc)
996{
997 std::string path;
998
999 int index = 0;
1000 if (!tc->getMemProxy().tryReadString(path,
1001 process->getSyscallArg(tc, index))) {
1002 return -EFAULT;
1003 }
1004 Addr bufPtr = process->getSyscallArg(tc, index);
1005
1006 // Adjust path for current working directory
1007 path = process->fullPath(path);
1008
1009 struct stat hostBuf;
1010 int result = lstat(path.c_str(), &hostBuf);
1011
1012 if (result < 0)
1013 return -errno;
1014
1015 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
1016
1017 return 0;
1018}
1019
1020/// Target lstat64() handler.
1021template <class OS>
1022SyscallReturn
1023lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
1024 ThreadContext *tc)
1025{
1026 std::string path;
1027
1028 int index = 0;
1029 if (!tc->getMemProxy().tryReadString(path,
1030 process->getSyscallArg(tc, index))) {
1031 return -EFAULT;
1032 }
1033 Addr bufPtr = process->getSyscallArg(tc, index);
1034
1035 // Adjust path for current working directory
1036 path = process->fullPath(path);
1037
1038#if NO_STAT64
1039 struct stat hostBuf;
1040 int result = lstat(path.c_str(), &hostBuf);
1041#else
1042 struct stat64 hostBuf;
1043 int result = lstat64(path.c_str(), &hostBuf);
1044#endif
1045
1046 if (result < 0)
1047 return -errno;
1048
1049 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
1050
1051 return 0;
1052}
1053
1054/// Target fstat() handler.
1055template <class OS>
1056SyscallReturn
1057fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1058 ThreadContext *tc)
1059{
1060 int index = 0;
1061 int fd = process->sim_fd(process->getSyscallArg(tc, index));
1062 Addr bufPtr = process->getSyscallArg(tc, index);
1063
1064 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
1065
1066 if (fd < 0)
1067 return -EBADF;
1068
1069 struct stat hostBuf;
1070 int result = fstat(fd, &hostBuf);
1071
1072 if (result < 0)
1073 return -errno;
1074
1075 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (fd == 1));
1076
1077 return 0;
1078}
1079
1080
1081/// Target statfs() handler.
1082template <class OS>
1083SyscallReturn
1084statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1085 ThreadContext *tc)
1086{
1087 std::string path;
1088
1089 int index = 0;
1090 if (!tc->getMemProxy().tryReadString(path,
1091 process->getSyscallArg(tc, index))) {
1092 return -EFAULT;
1093 }
1094 Addr bufPtr = process->getSyscallArg(tc, index);
1095
1096 // Adjust path for current working directory
1097 path = process->fullPath(path);
1098
1099 struct statfs hostBuf;
1100 int result = statfs(path.c_str(), &hostBuf);
1101
1102 if (result < 0)
1103 return -errno;
1104
1105 OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
1106
1107 return 0;
1108}
1109
1110
1111/// Target fstatfs() handler.
1112template <class OS>
1113SyscallReturn
1114fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1115 ThreadContext *tc)
1116{
1117 int index = 0;
1118 int fd = process->sim_fd(process->getSyscallArg(tc, index));
1119 Addr bufPtr = process->getSyscallArg(tc, index);
1120
1121 if (fd < 0)
1122 return -EBADF;
1123
1124 struct statfs hostBuf;
1125 int result = fstatfs(fd, &hostBuf);
1126
1127 if (result < 0)
1128 return -errno;
1129
1130 OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
1131
1132 return 0;
1133}
1134
1135
1136/// Target writev() handler.
1137template <class OS>
1138SyscallReturn
1139writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1140 ThreadContext *tc)
1141{
1142 int index = 0;
1143 int fd = process->getSyscallArg(tc, index);
1144 if (fd < 0 || process->sim_fd(fd) < 0) {
1145 // doesn't map to any simulator fd: not a valid target fd
1146 return -EBADF;
1147 }
1148
1149 SETranslatingPortProxy &p = tc->getMemProxy();
1150 uint64_t tiov_base = process->getSyscallArg(tc, index);
1151 size_t count = process->getSyscallArg(tc, index);
1152 struct iovec hiov[count];
1153 for (size_t i = 0; i < count; ++i) {
1154 typename OS::tgt_iovec tiov;
1155
1156 p.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
1157 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
1158 hiov[i].iov_len = TheISA::gtoh(tiov.iov_len);
1159 hiov[i].iov_base = new char [hiov[i].iov_len];
1160 p.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
1161 hiov[i].iov_len);
1162 }
1163
1164 int result = writev(process->sim_fd(fd), hiov, count);
1165
1166 for (size_t i = 0; i < count; ++i)
1167 delete [] (char *)hiov[i].iov_base;
1168
1169 if (result < 0)
1170 return -errno;
1171
1172 return result;
1173}
1174
1175
1176/// Target mmap() handler.
1177///
1178/// We don't really handle mmap(). If the target is mmaping an
1179/// anonymous region or /dev/zero, we can get away with doing basically
1180/// nothing (since memory is initialized to zero and the simulator
1181/// doesn't really check addresses anyway).
1182///
1183template <class OS>
1184SyscallReturn
1185mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
1186{
1187 int index = 0;
1188 Addr start = p->getSyscallArg(tc, index);
1189 uint64_t length = p->getSyscallArg(tc, index);
1190 index++; // int prot = p->getSyscallArg(tc, index);
1191 int flags = p->getSyscallArg(tc, index);
1192 int tgt_fd = p->getSyscallArg(tc, index);
1193 int offset = p->getSyscallArg(tc, index);
1194
1195 if (length > 0x100000000ULL)
1196 warn("mmap length argument %#x is unreasonably large.\n", length);
1197
1198 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
1199 Process::FdMap *fd_map = p->sim_fd_obj(tgt_fd);
1200 if (!fd_map || fd_map->fd < 0) {
1201 warn("mmap failing: target fd %d is not valid\n", tgt_fd);
1202 return -EBADF;
1203 }
1204
1205 if (fd_map->filename != "/dev/zero") {
1206 // This is very likely broken, but leave a warning here
1207 // (rather than panic) in case /dev/zero is known by
1208 // another name on some platform
1209 warn("allowing mmap of file %s; mmap not supported on files"
1210 " other than /dev/zero\n", fd_map->filename);
1211 }
1212 }
1213
1214 length = roundUp(length, TheISA::PageBytes);
1215
1216 if ((start % TheISA::PageBytes) != 0 ||
1217 (offset % TheISA::PageBytes) != 0) {
1218 warn("mmap failing: arguments not page-aligned: "
1219 "start 0x%x offset 0x%x",
1220 start, offset);
1221 return -EINVAL;
1222 }
1223
1224 // are we ok with clobbering existing mappings? only set this to
1225 // true if the user has been warned.
1226 bool clobber = false;
1227
1228 // try to use the caller-provided address if there is one
1229 bool use_provided_address = (start != 0);
1230
1231 if (use_provided_address) {
1232 // check to see if the desired address is already in use
1233 if (!p->pTable->isUnmapped(start, length)) {
1234 // there are existing mappings in the desired range
1235 // whether we clobber them or not depends on whether the caller
1236 // specified MAP_FIXED
1237 if (flags & OS::TGT_MAP_FIXED) {
1238 // MAP_FIXED specified: map attempt fails
1239 return -EINVAL;
1240 } else {
1241 // MAP_FIXED not specified: ignore suggested start address
1242 warn("mmap: ignoring suggested map address 0x%x\n", start);
1243 use_provided_address = false;
1244 }
1245 }
1246 }
1247
1248 if (!use_provided_address) {
1249 // no address provided, or provided address unusable:
1250 // pick next address from our "mmap region"
1251 if (OS::mmapGrowsDown()) {
1252 start = p->mmap_end - length;
1253 p->mmap_end = start;
1254 } else {
1255 start = p->mmap_end;
1256 p->mmap_end += length;
1257 }
1258 }
1259
1260 p->allocateMem(start, length, clobber);
1261
1262 return start;
1263}
1264
1265/// Target getrlimit() handler.
1266template <class OS>
1267SyscallReturn
1268getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1269 ThreadContext *tc)
1270{
1271 int index = 0;
1272 unsigned resource = process->getSyscallArg(tc, index);
1273 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index));
1274
1275 switch (resource) {
1276 case OS::TGT_RLIMIT_STACK:
1277 // max stack size in bytes: make up a number (8MB for now)
1278 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
1279 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
1280 rlp->rlim_max = TheISA::htog(rlp->rlim_max);
1281 break;
1282
1283 case OS::TGT_RLIMIT_DATA:
1284 // max data segment size in bytes: make up a number
1285 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
1286 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
1287 rlp->rlim_max = TheISA::htog(rlp->rlim_max);
1288 break;
1289
1290 default:
1291 warn("getrlimit: unimplemented resource %d", resource);
1292 return -EINVAL;
1293 break;
1294 }
1295
1296 rlp.copyOut(tc->getMemProxy());
1297 return 0;
1298}
1299
1300/// Target clock_gettime() function.
1301template <class OS>
1302SyscallReturn
1303clock_gettimeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
1304{
1305 int index = 1;
1306 //int clk_id = p->getSyscallArg(tc, index);
1307 TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
1308
1309 getElapsedTimeNano(tp->tv_sec, tp->tv_nsec);
1310 tp->tv_sec += seconds_since_epoch;
1311 tp->tv_sec = TheISA::htog(tp->tv_sec);
1312 tp->tv_nsec = TheISA::htog(tp->tv_nsec);
1313
1314 tp.copyOut(tc->getMemProxy());
1315
1316 return 0;
1317}
1318
1319/// Target gettimeofday() handler.
1320template <class OS>
1321SyscallReturn
1322gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1323 ThreadContext *tc)
1324{
1325 int index = 0;
1326 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index));
1327
1328 getElapsedTimeMicro(tp->tv_sec, tp->tv_usec);
1329 tp->tv_sec += seconds_since_epoch;
1330 tp->tv_sec = TheISA::htog(tp->tv_sec);
1331 tp->tv_usec = TheISA::htog(tp->tv_usec);
1332
1333 tp.copyOut(tc->getMemProxy());
1334
1335 return 0;
1336}
1337
1338
1339/// Target utimes() handler.
1340template <class OS>
1341SyscallReturn
1342utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1343 ThreadContext *tc)
1344{
1345 std::string path;
1346
1347 int index = 0;
1348 if (!tc->getMemProxy().tryReadString(path,
1349 process->getSyscallArg(tc, index))) {
1350 return -EFAULT;
1351 }
1352
1353 TypedBufferArg<typename OS::timeval [2]>
1354 tp(process->getSyscallArg(tc, index));
1355 tp.copyIn(tc->getMemProxy());
1356
1357 struct timeval hostTimeval[2];
1358 for (int i = 0; i < 2; ++i)
1359 {
1360 hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec);
1361 hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec);
1362 }
1363
1364 // Adjust path for current working directory
1365 path = process->fullPath(path);
1366
1367 int result = utimes(path.c_str(), hostTimeval);
1368
1369 if (result < 0)
1370 return -errno;
1371
1372 return 0;
1373}
1374/// Target getrusage() function.
1375template <class OS>
1376SyscallReturn
1377getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1378 ThreadContext *tc)
1379{
1380 int index = 0;
1381 int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN
1382 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index));
1383
1384 rup->ru_utime.tv_sec = 0;
1385 rup->ru_utime.tv_usec = 0;
1386 rup->ru_stime.tv_sec = 0;
1387 rup->ru_stime.tv_usec = 0;
1388 rup->ru_maxrss = 0;
1389 rup->ru_ixrss = 0;
1390 rup->ru_idrss = 0;
1391 rup->ru_isrss = 0;
1392 rup->ru_minflt = 0;
1393 rup->ru_majflt = 0;
1394 rup->ru_nswap = 0;
1395 rup->ru_inblock = 0;
1396 rup->ru_oublock = 0;
1397 rup->ru_msgsnd = 0;
1398 rup->ru_msgrcv = 0;
1399 rup->ru_nsignals = 0;
1400 rup->ru_nvcsw = 0;
1401 rup->ru_nivcsw = 0;
1402
1403 switch (who) {
1404 case OS::TGT_RUSAGE_SELF:
1405 getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1406 rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec);
1407 rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec);
1408 break;
1409
1410 case OS::TGT_RUSAGE_CHILDREN:
1411 // do nothing. We have no child processes, so they take no time.
1412 break;
1413
1414 default:
1415 // don't really handle THREAD or CHILDREN, but just warn and
1416 // plow ahead
1417 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1418 who);
1419 }
1420
1421 rup.copyOut(tc->getMemProxy());
1422
1423 return 0;
1424}
1425
1426/// Target times() function.
1427template <class OS>
1428SyscallReturn
1429timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1430 ThreadContext *tc)
1431{
1432 int index = 0;
1433 TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index));
1434
1435 // Fill in the time structure (in clocks)
1436 int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s;
1437 bufp->tms_utime = clocks;
1438 bufp->tms_stime = 0;
1439 bufp->tms_cutime = 0;
1440 bufp->tms_cstime = 0;
1441
1442 // Convert to host endianness
1443 bufp->tms_utime = TheISA::htog(bufp->tms_utime);
1444
1445 // Write back
1446 bufp.copyOut(tc->getMemProxy());
1447
1448 // Return clock ticks since system boot
1449 return clocks;
1450}
1451
1452/// Target time() function.
1453template <class OS>
1454SyscallReturn
1455timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1456 ThreadContext *tc)
1457{
1458 typename OS::time_t sec, usec;
1459 getElapsedTimeMicro(sec, usec);
1460 sec += seconds_since_epoch;
1461
1462 int index = 0;
1463 Addr taddr = (Addr)process->getSyscallArg(tc, index);
1464 if(taddr != 0) {
1465 typename OS::time_t t = sec;
1466 t = TheISA::htog(t);
1467 SETranslatingPortProxy &p = tc->getMemProxy();
1468 p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t));
1469 }
1470 return sec;
1471}
1472
1473
1474#endif // __SIM_SYSCALL_EMUL_HH__
| 145
146/// Target exit() handler: terminate current context.
147SyscallReturn exitFunc(SyscallDesc *desc, int num,
148 LiveProcess *p, ThreadContext *tc);
149
150/// Target exit_group() handler: terminate simulation. (exit all threads)
151SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
152 LiveProcess *p, ThreadContext *tc);
153
154/// Target getpagesize() handler.
155SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
156 LiveProcess *p, ThreadContext *tc);
157
158/// Target brk() handler: set brk address.
159SyscallReturn brkFunc(SyscallDesc *desc, int num,
160 LiveProcess *p, ThreadContext *tc);
161
162/// Target close() handler.
163SyscallReturn closeFunc(SyscallDesc *desc, int num,
164 LiveProcess *p, ThreadContext *tc);
165
166/// Target read() handler.
167SyscallReturn readFunc(SyscallDesc *desc, int num,
168 LiveProcess *p, ThreadContext *tc);
169
170/// Target write() handler.
171SyscallReturn writeFunc(SyscallDesc *desc, int num,
172 LiveProcess *p, ThreadContext *tc);
173
174/// Target lseek() handler.
175SyscallReturn lseekFunc(SyscallDesc *desc, int num,
176 LiveProcess *p, ThreadContext *tc);
177
178/// Target _llseek() handler.
179SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
180 LiveProcess *p, ThreadContext *tc);
181
182/// Target munmap() handler.
183SyscallReturn munmapFunc(SyscallDesc *desc, int num,
184 LiveProcess *p, ThreadContext *tc);
185
186/// Target gethostname() handler.
187SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
188 LiveProcess *p, ThreadContext *tc);
189
190/// Target getcwd() handler.
191SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
192 LiveProcess *p, ThreadContext *tc);
193
194/// Target readlink() handler.
195SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
196 LiveProcess *p, ThreadContext *tc,
197 int index = 0);
198SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
199 LiveProcess *p, ThreadContext *tc);
200
201/// Target unlink() handler.
202SyscallReturn unlinkHelper(SyscallDesc *desc, int num,
203 LiveProcess *p, ThreadContext *tc,
204 int index);
205SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
206 LiveProcess *p, ThreadContext *tc);
207
208/// Target mkdir() handler.
209SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
210 LiveProcess *p, ThreadContext *tc);
211
212/// Target rename() handler.
213SyscallReturn renameFunc(SyscallDesc *desc, int num,
214 LiveProcess *p, ThreadContext *tc);
215
216
217/// Target truncate() handler.
218SyscallReturn truncateFunc(SyscallDesc *desc, int num,
219 LiveProcess *p, ThreadContext *tc);
220
221
222/// Target ftruncate() handler.
223SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
224 LiveProcess *p, ThreadContext *tc);
225
226
227/// Target truncate64() handler.
228SyscallReturn truncate64Func(SyscallDesc *desc, int num,
229 LiveProcess *p, ThreadContext *tc);
230
231/// Target ftruncate64() handler.
232SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
233 LiveProcess *p, ThreadContext *tc);
234
235
236/// Target umask() handler.
237SyscallReturn umaskFunc(SyscallDesc *desc, int num,
238 LiveProcess *p, ThreadContext *tc);
239
240
241/// Target chown() handler.
242SyscallReturn chownFunc(SyscallDesc *desc, int num,
243 LiveProcess *p, ThreadContext *tc);
244
245
246/// Target fchown() handler.
247SyscallReturn fchownFunc(SyscallDesc *desc, int num,
248 LiveProcess *p, ThreadContext *tc);
249
250/// Target dup() handler.
251SyscallReturn dupFunc(SyscallDesc *desc, int num,
252 LiveProcess *process, ThreadContext *tc);
253
254/// Target fnctl() handler.
255SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
256 LiveProcess *process, ThreadContext *tc);
257
258/// Target fcntl64() handler.
259SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
260 LiveProcess *process, ThreadContext *tc);
261
262/// Target setuid() handler.
263SyscallReturn setuidFunc(SyscallDesc *desc, int num,
264 LiveProcess *p, ThreadContext *tc);
265
266/// Target getpid() handler.
267SyscallReturn getpidFunc(SyscallDesc *desc, int num,
268 LiveProcess *p, ThreadContext *tc);
269
270/// Target getuid() handler.
271SyscallReturn getuidFunc(SyscallDesc *desc, int num,
272 LiveProcess *p, ThreadContext *tc);
273
274/// Target getgid() handler.
275SyscallReturn getgidFunc(SyscallDesc *desc, int num,
276 LiveProcess *p, ThreadContext *tc);
277
278/// Target getppid() handler.
279SyscallReturn getppidFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
281
282/// Target geteuid() handler.
283SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
284 LiveProcess *p, ThreadContext *tc);
285
286/// Target getegid() handler.
287SyscallReturn getegidFunc(SyscallDesc *desc, int num,
288 LiveProcess *p, ThreadContext *tc);
289
290/// Target clone() handler.
291SyscallReturn cloneFunc(SyscallDesc *desc, int num,
292 LiveProcess *p, ThreadContext *tc);
293
294/// Target access() handler
295SyscallReturn accessFunc(SyscallDesc *desc, int num,
296 LiveProcess *p, ThreadContext *tc);
297SyscallReturn accessFunc(SyscallDesc *desc, int num,
298 LiveProcess *p, ThreadContext *tc,
299 int index);
300
301/// Futex system call
302/// Implemented by Daniel Sanchez
303/// Used by printf's in multi-threaded apps
304template <class OS>
305SyscallReturn
306futexFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
307 ThreadContext *tc)
308{
309 int index_uaddr = 0;
310 int index_op = 1;
311 int index_val = 2;
312 int index_timeout = 3;
313
314 uint64_t uaddr = process->getSyscallArg(tc, index_uaddr);
315 int op = process->getSyscallArg(tc, index_op);
316 int val = process->getSyscallArg(tc, index_val);
317 uint64_t timeout = process->getSyscallArg(tc, index_timeout);
318
319 std::map<uint64_t, std::list<ThreadContext *> * >
320 &futex_map = tc->getSystemPtr()->futexMap;
321
322 DPRINTF(SyscallVerbose, "In sys_futex: Address=%llx, op=%d, val=%d\n",
323 uaddr, op, val);
324
325 op &= ~OS::TGT_FUTEX_PRIVATE_FLAG;
326
327 if (op == OS::TGT_FUTEX_WAIT) {
328 if (timeout != 0) {
329 warn("sys_futex: FUTEX_WAIT with non-null timeout unimplemented;"
330 "we'll wait indefinitely");
331 }
332
333 uint8_t *buf = new uint8_t[sizeof(int)];
334 tc->getMemProxy().readBlob((Addr)uaddr, buf, (int)sizeof(int));
335 int mem_val = *((int *)buf);
336 delete buf;
337
338 if(val != mem_val) {
339 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, read: %d, "
340 "expected: %d\n", mem_val, val);
341 return -OS::TGT_EWOULDBLOCK;
342 }
343
344 // Queue the thread context
345 std::list<ThreadContext *> * tcWaitList;
346 if (futex_map.count(uaddr)) {
347 tcWaitList = futex_map.find(uaddr)->second;
348 } else {
349 tcWaitList = new std::list<ThreadContext *>();
350 futex_map.insert(std::pair< uint64_t,
351 std::list<ThreadContext *> * >(uaddr, tcWaitList));
352 }
353 tcWaitList->push_back(tc);
354 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAIT, suspending calling "
355 "thread context\n");
356 tc->suspend();
357 return 0;
358 } else if (op == OS::TGT_FUTEX_WAKE){
359 int wokenUp = 0;
360 std::list<ThreadContext *> * tcWaitList;
361 if (futex_map.count(uaddr)) {
362 tcWaitList = futex_map.find(uaddr)->second;
363 while (tcWaitList->size() > 0 && wokenUp < val) {
364 tcWaitList->front()->activate();
365 tcWaitList->pop_front();
366 wokenUp++;
367 }
368 if(tcWaitList->empty()) {
369 futex_map.erase(uaddr);
370 delete tcWaitList;
371 }
372 }
373 DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, activated %d waiting "
374 "thread contexts\n", wokenUp);
375 return wokenUp;
376 } else {
377 warn("sys_futex: op %d is not implemented, just returning...", op);
378 return 0;
379 }
380
381}
382
383
384/// Pseudo Funcs - These functions use a different return convension,
385/// returning a second value in a register other than the normal return register
386SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
387 LiveProcess *process, ThreadContext *tc);
388
389/// Target getpidPseudo() handler.
390SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
391 LiveProcess *p, ThreadContext *tc);
392
393/// Target getuidPseudo() handler.
394SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
395 LiveProcess *p, ThreadContext *tc);
396
397/// Target getgidPseudo() handler.
398SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
399 LiveProcess *p, ThreadContext *tc);
400
401
402/// A readable name for 1,000,000, for converting microseconds to seconds.
403const int one_million = 1000000;
404/// A readable name for 1,000,000,000, for converting nanoseconds to seconds.
405const int one_billion = 1000000000;
406
407/// Approximate seconds since the epoch (1/1/1970). About a billion,
408/// by my reckoning. We want to keep this a constant (not use the
409/// real-world time) to keep simulations repeatable.
410const unsigned seconds_since_epoch = 1000000000;
411
412/// Helper function to convert current elapsed time to seconds and
413/// microseconds.
414template <class T1, class T2>
415void
416getElapsedTimeMicro(T1 &sec, T2 &usec)
417{
418 uint64_t elapsed_usecs = curTick() / SimClock::Int::us;
419 sec = elapsed_usecs / one_million;
420 usec = elapsed_usecs % one_million;
421}
422
423/// Helper function to convert current elapsed time to seconds and
424/// nanoseconds.
425template <class T1, class T2>
426void
427getElapsedTimeNano(T1 &sec, T2 &nsec)
428{
429 uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns;
430 sec = elapsed_nsecs / one_billion;
431 nsec = elapsed_nsecs % one_billion;
432}
433
434//////////////////////////////////////////////////////////////////////
435//
436// The following emulation functions are generic, but need to be
437// templated to account for differences in types, constants, etc.
438//
439//////////////////////////////////////////////////////////////////////
440
441#if NO_STAT64
442 typedef struct stat hst_stat;
443 typedef struct stat hst_stat64;
444#else
445 typedef struct stat hst_stat;
446 typedef struct stat64 hst_stat64;
447#endif
448
449//// Helper function to convert a host stat buffer to a target stat
450//// buffer. Also copies the target buffer out to the simulated
451//// memory space. Used by stat(), fstat(), and lstat().
452
453template <typename target_stat, typename host_stat>
454static void
455convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
456{
457 using namespace TheISA;
458
459 if (fakeTTY)
460 tgt->st_dev = 0xA;
461 else
462 tgt->st_dev = host->st_dev;
463 tgt->st_dev = TheISA::htog(tgt->st_dev);
464 tgt->st_ino = host->st_ino;
465 tgt->st_ino = TheISA::htog(tgt->st_ino);
466 tgt->st_mode = host->st_mode;
467 if (fakeTTY) {
468 // Claim to be a character device
469 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
470 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
471 }
472 tgt->st_mode = TheISA::htog(tgt->st_mode);
473 tgt->st_nlink = host->st_nlink;
474 tgt->st_nlink = TheISA::htog(tgt->st_nlink);
475 tgt->st_uid = host->st_uid;
476 tgt->st_uid = TheISA::htog(tgt->st_uid);
477 tgt->st_gid = host->st_gid;
478 tgt->st_gid = TheISA::htog(tgt->st_gid);
479 if (fakeTTY)
480 tgt->st_rdev = 0x880d;
481 else
482 tgt->st_rdev = host->st_rdev;
483 tgt->st_rdev = TheISA::htog(tgt->st_rdev);
484 tgt->st_size = host->st_size;
485 tgt->st_size = TheISA::htog(tgt->st_size);
486 tgt->st_atimeX = host->st_atime;
487 tgt->st_atimeX = TheISA::htog(tgt->st_atimeX);
488 tgt->st_mtimeX = host->st_mtime;
489 tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX);
490 tgt->st_ctimeX = host->st_ctime;
491 tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX);
492 // Force the block size to be 8k. This helps to ensure buffered io works
493 // consistently across different hosts.
494 tgt->st_blksize = 0x2000;
495 tgt->st_blksize = TheISA::htog(tgt->st_blksize);
496 tgt->st_blocks = host->st_blocks;
497 tgt->st_blocks = TheISA::htog(tgt->st_blocks);
498}
499
500// Same for stat64
501
502template <typename target_stat, typename host_stat64>
503static void
504convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
505{
506 using namespace TheISA;
507
508 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
509#if defined(STAT_HAVE_NSEC)
510 tgt->st_atime_nsec = host->st_atime_nsec;
511 tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec);
512 tgt->st_mtime_nsec = host->st_mtime_nsec;
513 tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec);
514 tgt->st_ctime_nsec = host->st_ctime_nsec;
515 tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec);
516#else
517 tgt->st_atime_nsec = 0;
518 tgt->st_mtime_nsec = 0;
519 tgt->st_ctime_nsec = 0;
520#endif
521}
522
523//Here are a couple convenience functions
524template<class OS>
525static void
526copyOutStatBuf(SETranslatingPortProxy &mem, Addr addr,
527 hst_stat *host, bool fakeTTY = false)
528{
529 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
530 tgt_stat_buf tgt(addr);
531 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
532 tgt.copyOut(mem);
533}
534
535template<class OS>
536static void
537copyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr,
538 hst_stat64 *host, bool fakeTTY = false)
539{
540 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
541 tgt_stat_buf tgt(addr);
542 convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
543 tgt.copyOut(mem);
544}
545
546/// Target ioctl() handler. For the most part, programs call ioctl()
547/// only to find out if their stdout is a tty, to determine whether to
548/// do line or block buffering. We always claim that output fds are
549/// not TTYs to provide repeatable results.
550template <class OS>
551SyscallReturn
552ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
553 ThreadContext *tc)
554{
555 int index = 0;
556 int fd = process->getSyscallArg(tc, index);
557 unsigned req = process->getSyscallArg(tc, index);
558
559 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
560
561 Process::FdMap *fdObj = process->sim_fd_obj(fd);
562
563 if (fdObj == NULL) {
564 // doesn't map to any simulator fd: not a valid target fd
565 return -EBADF;
566 }
567
568 if (fdObj->driver != NULL) {
569 return fdObj->driver->ioctl(process, tc, req);
570 }
571
572 if (OS::isTtyReq(req)) {
573 return -ENOTTY;
574 }
575
576 warn("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ \n",
577 fd, req, tc->pcState());
578 return -ENOTTY;
579}
580
581template <class OS>
582static SyscallReturn
583openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
584 ThreadContext *tc, int index)
585{
586 std::string path;
587
588 if (!tc->getMemProxy().tryReadString(path,
589 process->getSyscallArg(tc, index)))
590 return -EFAULT;
591
592 int tgtFlags = process->getSyscallArg(tc, index);
593 int mode = process->getSyscallArg(tc, index);
594 int hostFlags = 0;
595
596 // translate open flags
597 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
598 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
599 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
600 hostFlags |= OS::openFlagTable[i].hostFlag;
601 }
602 }
603
604 // any target flags left?
605 if (tgtFlags != 0)
606 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
607
608#ifdef __CYGWIN32__
609 hostFlags |= O_BINARY;
610#endif
611
612 // Adjust path for current working directory
613 path = process->fullPath(path);
614
615 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
616
617 if (startswith(path, "/dev/")) {
618 std::string filename = path.substr(strlen("/dev/"));
619 if (filename == "sysdev0") {
620 // This is a memory-mapped high-resolution timer device on Alpha.
621 // We don't support it, so just punt.
622 warn("Ignoring open(%s, ...)\n", path);
623 return -ENOENT;
624 }
625
626 EmulatedDriver *drv = process->findDriver(filename);
627 if (drv != NULL) {
628 // the driver's open method will allocate a fd from the
629 // process if necessary.
630 return drv->open(process, tc, mode, hostFlags);
631 }
632
633 // fall through here for pass through to host devices, such as
634 // /dev/zero
635 }
636
637 int fd;
638 int local_errno;
639 if (startswith(path, "/proc/") || startswith(path, "/system/") ||
640 startswith(path, "/platform/") || startswith(path, "/sys/")) {
641 // It's a proc/sys entry and requires special handling
642 fd = OS::openSpecialFile(path, process, tc);
643 local_errno = ENOENT;
644 } else {
645 // open the file
646 fd = open(path.c_str(), hostFlags, mode);
647 local_errno = errno;
648 }
649
650 if (fd == -1)
651 return -local_errno;
652
653 return process->alloc_fd(fd, path.c_str(), hostFlags, mode, false);
654}
655
656/// Target open() handler.
657template <class OS>
658SyscallReturn
659openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
660 ThreadContext *tc)
661{
662 return openFunc<OS>(desc, callnum, process, tc, 0);
663}
664
665/// Target openat() handler.
666template <class OS>
667SyscallReturn
668openatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
669 ThreadContext *tc)
670{
671 int index = 0;
672 int dirfd = process->getSyscallArg(tc, index);
673 if (dirfd != OS::TGT_AT_FDCWD)
674 warn("openat: first argument not AT_FDCWD; unlikely to work");
675 return openFunc<OS>(desc, callnum, process, tc, 1);
676}
677
678/// Target unlinkat() handler.
679template <class OS>
680SyscallReturn
681unlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
682 ThreadContext *tc)
683{
684 int index = 0;
685 int dirfd = process->getSyscallArg(tc, index);
686 if (dirfd != OS::TGT_AT_FDCWD)
687 warn("unlinkat: first argument not AT_FDCWD; unlikely to work");
688
689 return unlinkHelper(desc, callnum, process, tc, 1);
690}
691
692/// Target facessat() handler
693template <class OS>
694SyscallReturn
695faccessatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
696 ThreadContext *tc)
697{
698 int index = 0;
699 int dirfd = process->getSyscallArg(tc, index);
700 if (dirfd != OS::TGT_AT_FDCWD)
701 warn("faccessat: first argument not AT_FDCWD; unlikely to work");
702 return accessFunc(desc, callnum, process, tc, 1);
703}
704
705/// Target readlinkat() handler
706template <class OS>
707SyscallReturn
708readlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
709 ThreadContext *tc)
710{
711 int index = 0;
712 int dirfd = process->getSyscallArg(tc, index);
713 if (dirfd != OS::TGT_AT_FDCWD)
714 warn("openat: first argument not AT_FDCWD; unlikely to work");
715 return readlinkFunc(desc, callnum, process, tc, 1);
716}
717
718/// Target sysinfo() handler.
719template <class OS>
720SyscallReturn
721sysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
722 ThreadContext *tc)
723{
724
725 int index = 0;
726 TypedBufferArg<typename OS::tgt_sysinfo>
727 sysinfo(process->getSyscallArg(tc, index));
728
729 sysinfo->uptime=seconds_since_epoch;
730 sysinfo->totalram=process->system->memSize();
731
732 sysinfo.copyOut(tc->getMemProxy());
733
734 return 0;
735}
736
737/// Target chmod() handler.
738template <class OS>
739SyscallReturn
740chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
741 ThreadContext *tc)
742{
743 std::string path;
744
745 int index = 0;
746 if (!tc->getMemProxy().tryReadString(path,
747 process->getSyscallArg(tc, index))) {
748 return -EFAULT;
749 }
750
751 uint32_t mode = process->getSyscallArg(tc, index);
752 mode_t hostMode = 0;
753
754 // XXX translate mode flags via OS::something???
755 hostMode = mode;
756
757 // Adjust path for current working directory
758 path = process->fullPath(path);
759
760 // do the chmod
761 int result = chmod(path.c_str(), hostMode);
762 if (result < 0)
763 return -errno;
764
765 return 0;
766}
767
768
769/// Target fchmod() handler.
770template <class OS>
771SyscallReturn
772fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
773 ThreadContext *tc)
774{
775 int index = 0;
776 int fd = process->getSyscallArg(tc, index);
777 if (fd < 0 || process->sim_fd(fd) < 0) {
778 // doesn't map to any simulator fd: not a valid target fd
779 return -EBADF;
780 }
781
782 uint32_t mode = process->getSyscallArg(tc, index);
783 mode_t hostMode = 0;
784
785 // XXX translate mode flags via OS::someting???
786 hostMode = mode;
787
788 // do the fchmod
789 int result = fchmod(process->sim_fd(fd), hostMode);
790 if (result < 0)
791 return -errno;
792
793 return 0;
794}
795
796/// Target mremap() handler.
797template <class OS>
798SyscallReturn
799mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
800{
801 int index = 0;
802 Addr start = process->getSyscallArg(tc, index);
803 uint64_t old_length = process->getSyscallArg(tc, index);
804 uint64_t new_length = process->getSyscallArg(tc, index);
805 uint64_t flags = process->getSyscallArg(tc, index);
806 uint64_t provided_address = 0;
807 bool use_provided_address = flags & OS::TGT_MREMAP_FIXED;
808
809 if (use_provided_address)
810 provided_address = process->getSyscallArg(tc, index);
811
812 if ((start % TheISA::PageBytes != 0) ||
813 (provided_address % TheISA::PageBytes != 0)) {
814 warn("mremap failing: arguments not page aligned");
815 return -EINVAL;
816 }
817
818 new_length = roundUp(new_length, TheISA::PageBytes);
819
820 if (new_length > old_length) {
821 if ((start + old_length) == process->mmap_end &&
822 (!use_provided_address || provided_address == start)) {
823 uint64_t diff = new_length - old_length;
824 process->allocateMem(process->mmap_end, diff);
825 process->mmap_end += diff;
826 return start;
827 } else {
828 if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) {
829 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
830 return -ENOMEM;
831 } else {
832 uint64_t new_start = use_provided_address ?
833 provided_address : process->mmap_end;
834 process->pTable->remap(start, old_length, new_start);
835 warn("mremapping to new vaddr %08p-%08p, adding %d\n",
836 new_start, new_start + new_length,
837 new_length - old_length);
838 // add on the remaining unallocated pages
839 process->allocateMem(new_start + old_length,
840 new_length - old_length,
841 use_provided_address /* clobber */);
842 if (!use_provided_address)
843 process->mmap_end += new_length;
844 if (use_provided_address &&
845 new_start + new_length > process->mmap_end) {
846 // something fishy going on here, at least notify the user
847 // @todo: increase mmap_end?
848 warn("mmap region limit exceeded with MREMAP_FIXED\n");
849 }
850 warn("returning %08p as start\n", new_start);
851 return new_start;
852 }
853 }
854 } else {
855 if (use_provided_address && provided_address != start)
856 process->pTable->remap(start, new_length, provided_address);
857 process->pTable->unmap(start + new_length, old_length - new_length);
858 return use_provided_address ? provided_address : start;
859 }
860}
861
862/// Target stat() handler.
863template <class OS>
864SyscallReturn
865statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
866 ThreadContext *tc)
867{
868 std::string path;
869
870 int index = 0;
871 if (!tc->getMemProxy().tryReadString(path,
872 process->getSyscallArg(tc, index))) {
873 return -EFAULT;
874 }
875 Addr bufPtr = process->getSyscallArg(tc, index);
876
877 // Adjust path for current working directory
878 path = process->fullPath(path);
879
880 struct stat hostBuf;
881 int result = stat(path.c_str(), &hostBuf);
882
883 if (result < 0)
884 return -errno;
885
886 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
887
888 return 0;
889}
890
891
892/// Target stat64() handler.
893template <class OS>
894SyscallReturn
895stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
896 ThreadContext *tc)
897{
898 std::string path;
899
900 int index = 0;
901 if (!tc->getMemProxy().tryReadString(path,
902 process->getSyscallArg(tc, index)))
903 return -EFAULT;
904 Addr bufPtr = process->getSyscallArg(tc, index);
905
906 // Adjust path for current working directory
907 path = process->fullPath(path);
908
909#if NO_STAT64
910 struct stat hostBuf;
911 int result = stat(path.c_str(), &hostBuf);
912#else
913 struct stat64 hostBuf;
914 int result = stat64(path.c_str(), &hostBuf);
915#endif
916
917 if (result < 0)
918 return -errno;
919
920 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
921
922 return 0;
923}
924
925
926/// Target fstatat64() handler.
927template <class OS>
928SyscallReturn
929fstatat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
930 ThreadContext *tc)
931{
932 int index = 0;
933 int dirfd = process->getSyscallArg(tc, index);
934 if (dirfd != OS::TGT_AT_FDCWD)
935 warn("fstatat64: first argument not AT_FDCWD; unlikely to work");
936
937 std::string path;
938 if (!tc->getMemProxy().tryReadString(path,
939 process->getSyscallArg(tc, index)))
940 return -EFAULT;
941 Addr bufPtr = process->getSyscallArg(tc, index);
942
943 // Adjust path for current working directory
944 path = process->fullPath(path);
945
946#if NO_STAT64
947 struct stat hostBuf;
948 int result = stat(path.c_str(), &hostBuf);
949#else
950 struct stat64 hostBuf;
951 int result = stat64(path.c_str(), &hostBuf);
952#endif
953
954 if (result < 0)
955 return -errno;
956
957 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
958
959 return 0;
960}
961
962
963/// Target fstat64() handler.
964template <class OS>
965SyscallReturn
966fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
967 ThreadContext *tc)
968{
969 int index = 0;
970 int fd = process->getSyscallArg(tc, index);
971 Addr bufPtr = process->getSyscallArg(tc, index);
972 if (fd < 0 || process->sim_fd(fd) < 0) {
973 // doesn't map to any simulator fd: not a valid target fd
974 return -EBADF;
975 }
976
977#if NO_STAT64
978 struct stat hostBuf;
979 int result = fstat(process->sim_fd(fd), &hostBuf);
980#else
981 struct stat64 hostBuf;
982 int result = fstat64(process->sim_fd(fd), &hostBuf);
983#endif
984
985 if (result < 0)
986 return -errno;
987
988 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (fd == 1));
989
990 return 0;
991}
992
993
994/// Target lstat() handler.
995template <class OS>
996SyscallReturn
997lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
998 ThreadContext *tc)
999{
1000 std::string path;
1001
1002 int index = 0;
1003 if (!tc->getMemProxy().tryReadString(path,
1004 process->getSyscallArg(tc, index))) {
1005 return -EFAULT;
1006 }
1007 Addr bufPtr = process->getSyscallArg(tc, index);
1008
1009 // Adjust path for current working directory
1010 path = process->fullPath(path);
1011
1012 struct stat hostBuf;
1013 int result = lstat(path.c_str(), &hostBuf);
1014
1015 if (result < 0)
1016 return -errno;
1017
1018 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
1019
1020 return 0;
1021}
1022
1023/// Target lstat64() handler.
1024template <class OS>
1025SyscallReturn
1026lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
1027 ThreadContext *tc)
1028{
1029 std::string path;
1030
1031 int index = 0;
1032 if (!tc->getMemProxy().tryReadString(path,
1033 process->getSyscallArg(tc, index))) {
1034 return -EFAULT;
1035 }
1036 Addr bufPtr = process->getSyscallArg(tc, index);
1037
1038 // Adjust path for current working directory
1039 path = process->fullPath(path);
1040
1041#if NO_STAT64
1042 struct stat hostBuf;
1043 int result = lstat(path.c_str(), &hostBuf);
1044#else
1045 struct stat64 hostBuf;
1046 int result = lstat64(path.c_str(), &hostBuf);
1047#endif
1048
1049 if (result < 0)
1050 return -errno;
1051
1052 copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
1053
1054 return 0;
1055}
1056
1057/// Target fstat() handler.
1058template <class OS>
1059SyscallReturn
1060fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1061 ThreadContext *tc)
1062{
1063 int index = 0;
1064 int fd = process->sim_fd(process->getSyscallArg(tc, index));
1065 Addr bufPtr = process->getSyscallArg(tc, index);
1066
1067 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
1068
1069 if (fd < 0)
1070 return -EBADF;
1071
1072 struct stat hostBuf;
1073 int result = fstat(fd, &hostBuf);
1074
1075 if (result < 0)
1076 return -errno;
1077
1078 copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (fd == 1));
1079
1080 return 0;
1081}
1082
1083
1084/// Target statfs() handler.
1085template <class OS>
1086SyscallReturn
1087statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1088 ThreadContext *tc)
1089{
1090 std::string path;
1091
1092 int index = 0;
1093 if (!tc->getMemProxy().tryReadString(path,
1094 process->getSyscallArg(tc, index))) {
1095 return -EFAULT;
1096 }
1097 Addr bufPtr = process->getSyscallArg(tc, index);
1098
1099 // Adjust path for current working directory
1100 path = process->fullPath(path);
1101
1102 struct statfs hostBuf;
1103 int result = statfs(path.c_str(), &hostBuf);
1104
1105 if (result < 0)
1106 return -errno;
1107
1108 OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
1109
1110 return 0;
1111}
1112
1113
1114/// Target fstatfs() handler.
1115template <class OS>
1116SyscallReturn
1117fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1118 ThreadContext *tc)
1119{
1120 int index = 0;
1121 int fd = process->sim_fd(process->getSyscallArg(tc, index));
1122 Addr bufPtr = process->getSyscallArg(tc, index);
1123
1124 if (fd < 0)
1125 return -EBADF;
1126
1127 struct statfs hostBuf;
1128 int result = fstatfs(fd, &hostBuf);
1129
1130 if (result < 0)
1131 return -errno;
1132
1133 OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
1134
1135 return 0;
1136}
1137
1138
1139/// Target writev() handler.
1140template <class OS>
1141SyscallReturn
1142writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1143 ThreadContext *tc)
1144{
1145 int index = 0;
1146 int fd = process->getSyscallArg(tc, index);
1147 if (fd < 0 || process->sim_fd(fd) < 0) {
1148 // doesn't map to any simulator fd: not a valid target fd
1149 return -EBADF;
1150 }
1151
1152 SETranslatingPortProxy &p = tc->getMemProxy();
1153 uint64_t tiov_base = process->getSyscallArg(tc, index);
1154 size_t count = process->getSyscallArg(tc, index);
1155 struct iovec hiov[count];
1156 for (size_t i = 0; i < count; ++i) {
1157 typename OS::tgt_iovec tiov;
1158
1159 p.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
1160 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
1161 hiov[i].iov_len = TheISA::gtoh(tiov.iov_len);
1162 hiov[i].iov_base = new char [hiov[i].iov_len];
1163 p.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
1164 hiov[i].iov_len);
1165 }
1166
1167 int result = writev(process->sim_fd(fd), hiov, count);
1168
1169 for (size_t i = 0; i < count; ++i)
1170 delete [] (char *)hiov[i].iov_base;
1171
1172 if (result < 0)
1173 return -errno;
1174
1175 return result;
1176}
1177
1178
1179/// Target mmap() handler.
1180///
1181/// We don't really handle mmap(). If the target is mmaping an
1182/// anonymous region or /dev/zero, we can get away with doing basically
1183/// nothing (since memory is initialized to zero and the simulator
1184/// doesn't really check addresses anyway).
1185///
1186template <class OS>
1187SyscallReturn
1188mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
1189{
1190 int index = 0;
1191 Addr start = p->getSyscallArg(tc, index);
1192 uint64_t length = p->getSyscallArg(tc, index);
1193 index++; // int prot = p->getSyscallArg(tc, index);
1194 int flags = p->getSyscallArg(tc, index);
1195 int tgt_fd = p->getSyscallArg(tc, index);
1196 int offset = p->getSyscallArg(tc, index);
1197
1198 if (length > 0x100000000ULL)
1199 warn("mmap length argument %#x is unreasonably large.\n", length);
1200
1201 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
1202 Process::FdMap *fd_map = p->sim_fd_obj(tgt_fd);
1203 if (!fd_map || fd_map->fd < 0) {
1204 warn("mmap failing: target fd %d is not valid\n", tgt_fd);
1205 return -EBADF;
1206 }
1207
1208 if (fd_map->filename != "/dev/zero") {
1209 // This is very likely broken, but leave a warning here
1210 // (rather than panic) in case /dev/zero is known by
1211 // another name on some platform
1212 warn("allowing mmap of file %s; mmap not supported on files"
1213 " other than /dev/zero\n", fd_map->filename);
1214 }
1215 }
1216
1217 length = roundUp(length, TheISA::PageBytes);
1218
1219 if ((start % TheISA::PageBytes) != 0 ||
1220 (offset % TheISA::PageBytes) != 0) {
1221 warn("mmap failing: arguments not page-aligned: "
1222 "start 0x%x offset 0x%x",
1223 start, offset);
1224 return -EINVAL;
1225 }
1226
1227 // are we ok with clobbering existing mappings? only set this to
1228 // true if the user has been warned.
1229 bool clobber = false;
1230
1231 // try to use the caller-provided address if there is one
1232 bool use_provided_address = (start != 0);
1233
1234 if (use_provided_address) {
1235 // check to see if the desired address is already in use
1236 if (!p->pTable->isUnmapped(start, length)) {
1237 // there are existing mappings in the desired range
1238 // whether we clobber them or not depends on whether the caller
1239 // specified MAP_FIXED
1240 if (flags & OS::TGT_MAP_FIXED) {
1241 // MAP_FIXED specified: map attempt fails
1242 return -EINVAL;
1243 } else {
1244 // MAP_FIXED not specified: ignore suggested start address
1245 warn("mmap: ignoring suggested map address 0x%x\n", start);
1246 use_provided_address = false;
1247 }
1248 }
1249 }
1250
1251 if (!use_provided_address) {
1252 // no address provided, or provided address unusable:
1253 // pick next address from our "mmap region"
1254 if (OS::mmapGrowsDown()) {
1255 start = p->mmap_end - length;
1256 p->mmap_end = start;
1257 } else {
1258 start = p->mmap_end;
1259 p->mmap_end += length;
1260 }
1261 }
1262
1263 p->allocateMem(start, length, clobber);
1264
1265 return start;
1266}
1267
1268/// Target getrlimit() handler.
1269template <class OS>
1270SyscallReturn
1271getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1272 ThreadContext *tc)
1273{
1274 int index = 0;
1275 unsigned resource = process->getSyscallArg(tc, index);
1276 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index));
1277
1278 switch (resource) {
1279 case OS::TGT_RLIMIT_STACK:
1280 // max stack size in bytes: make up a number (8MB for now)
1281 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
1282 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
1283 rlp->rlim_max = TheISA::htog(rlp->rlim_max);
1284 break;
1285
1286 case OS::TGT_RLIMIT_DATA:
1287 // max data segment size in bytes: make up a number
1288 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
1289 rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
1290 rlp->rlim_max = TheISA::htog(rlp->rlim_max);
1291 break;
1292
1293 default:
1294 warn("getrlimit: unimplemented resource %d", resource);
1295 return -EINVAL;
1296 break;
1297 }
1298
1299 rlp.copyOut(tc->getMemProxy());
1300 return 0;
1301}
1302
1303/// Target clock_gettime() function.
1304template <class OS>
1305SyscallReturn
1306clock_gettimeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
1307{
1308 int index = 1;
1309 //int clk_id = p->getSyscallArg(tc, index);
1310 TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
1311
1312 getElapsedTimeNano(tp->tv_sec, tp->tv_nsec);
1313 tp->tv_sec += seconds_since_epoch;
1314 tp->tv_sec = TheISA::htog(tp->tv_sec);
1315 tp->tv_nsec = TheISA::htog(tp->tv_nsec);
1316
1317 tp.copyOut(tc->getMemProxy());
1318
1319 return 0;
1320}
1321
1322/// Target gettimeofday() handler.
1323template <class OS>
1324SyscallReturn
1325gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1326 ThreadContext *tc)
1327{
1328 int index = 0;
1329 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index));
1330
1331 getElapsedTimeMicro(tp->tv_sec, tp->tv_usec);
1332 tp->tv_sec += seconds_since_epoch;
1333 tp->tv_sec = TheISA::htog(tp->tv_sec);
1334 tp->tv_usec = TheISA::htog(tp->tv_usec);
1335
1336 tp.copyOut(tc->getMemProxy());
1337
1338 return 0;
1339}
1340
1341
1342/// Target utimes() handler.
1343template <class OS>
1344SyscallReturn
1345utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1346 ThreadContext *tc)
1347{
1348 std::string path;
1349
1350 int index = 0;
1351 if (!tc->getMemProxy().tryReadString(path,
1352 process->getSyscallArg(tc, index))) {
1353 return -EFAULT;
1354 }
1355
1356 TypedBufferArg<typename OS::timeval [2]>
1357 tp(process->getSyscallArg(tc, index));
1358 tp.copyIn(tc->getMemProxy());
1359
1360 struct timeval hostTimeval[2];
1361 for (int i = 0; i < 2; ++i)
1362 {
1363 hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec);
1364 hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec);
1365 }
1366
1367 // Adjust path for current working directory
1368 path = process->fullPath(path);
1369
1370 int result = utimes(path.c_str(), hostTimeval);
1371
1372 if (result < 0)
1373 return -errno;
1374
1375 return 0;
1376}
1377/// Target getrusage() function.
1378template <class OS>
1379SyscallReturn
1380getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1381 ThreadContext *tc)
1382{
1383 int index = 0;
1384 int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN
1385 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index));
1386
1387 rup->ru_utime.tv_sec = 0;
1388 rup->ru_utime.tv_usec = 0;
1389 rup->ru_stime.tv_sec = 0;
1390 rup->ru_stime.tv_usec = 0;
1391 rup->ru_maxrss = 0;
1392 rup->ru_ixrss = 0;
1393 rup->ru_idrss = 0;
1394 rup->ru_isrss = 0;
1395 rup->ru_minflt = 0;
1396 rup->ru_majflt = 0;
1397 rup->ru_nswap = 0;
1398 rup->ru_inblock = 0;
1399 rup->ru_oublock = 0;
1400 rup->ru_msgsnd = 0;
1401 rup->ru_msgrcv = 0;
1402 rup->ru_nsignals = 0;
1403 rup->ru_nvcsw = 0;
1404 rup->ru_nivcsw = 0;
1405
1406 switch (who) {
1407 case OS::TGT_RUSAGE_SELF:
1408 getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1409 rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec);
1410 rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec);
1411 break;
1412
1413 case OS::TGT_RUSAGE_CHILDREN:
1414 // do nothing. We have no child processes, so they take no time.
1415 break;
1416
1417 default:
1418 // don't really handle THREAD or CHILDREN, but just warn and
1419 // plow ahead
1420 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1421 who);
1422 }
1423
1424 rup.copyOut(tc->getMemProxy());
1425
1426 return 0;
1427}
1428
1429/// Target times() function.
1430template <class OS>
1431SyscallReturn
1432timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1433 ThreadContext *tc)
1434{
1435 int index = 0;
1436 TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index));
1437
1438 // Fill in the time structure (in clocks)
1439 int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s;
1440 bufp->tms_utime = clocks;
1441 bufp->tms_stime = 0;
1442 bufp->tms_cutime = 0;
1443 bufp->tms_cstime = 0;
1444
1445 // Convert to host endianness
1446 bufp->tms_utime = TheISA::htog(bufp->tms_utime);
1447
1448 // Write back
1449 bufp.copyOut(tc->getMemProxy());
1450
1451 // Return clock ticks since system boot
1452 return clocks;
1453}
1454
1455/// Target time() function.
1456template <class OS>
1457SyscallReturn
1458timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1459 ThreadContext *tc)
1460{
1461 typename OS::time_t sec, usec;
1462 getElapsedTimeMicro(sec, usec);
1463 sec += seconds_since_epoch;
1464
1465 int index = 0;
1466 Addr taddr = (Addr)process->getSyscallArg(tc, index);
1467 if(taddr != 0) {
1468 typename OS::time_t t = sec;
1469 t = TheISA::htog(t);
1470 SETranslatingPortProxy &p = tc->getMemProxy();
1471 p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t));
1472 }
1473 return sec;
1474}
1475
1476
1477#endif // __SIM_SYSCALL_EMUL_HH__
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