1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * Copyright (c) 2015 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Copyright (c) 2003-2005 The Regents of The University of Michigan
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;
22 * redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution;
25 * neither the name of the copyright holders nor the names of its
26 * contributors may be used to endorse or promote products derived from
27 * this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Steve Reinhardt
42 * Kevin Lim
43 */
44
45#ifndef __SIM_SYSCALL_EMUL_HH__
46#define __SIM_SYSCALL_EMUL_HH__
47
48#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
49 defined(__FreeBSD__) || defined(__CYGWIN__) || \
50 defined(__NetBSD__))
51
52///
53/// @file syscall_emul.hh
54///
55/// This file defines objects used to emulate syscalls from the target
56/// application on the host machine.
57
58#ifdef __CYGWIN32__
59#include <sys/fcntl.h> // for O_BINARY
60#endif
61#include <sys/stat.h>
62#include <sys/time.h>
63#include <sys/uio.h>
64#include <fcntl.h>
65
66#include <cerrno>
67#include <string>
68
69#include "base/chunk_generator.hh"
70#include "base/intmath.hh" // for RoundUp
71#include "base/misc.hh"
72#include "base/trace.hh"
73#include "base/types.hh"
74#include "config/the_isa.hh"
75#include "cpu/base.hh"
76#include "cpu/thread_context.hh"
77#include "debug/SyscallVerbose.hh"
78#include "mem/page_table.hh"
79#include "sim/byteswap.hh"
80#include "sim/emul_driver.hh"
81#include "sim/process.hh"
82#include "sim/syscall_emul_buf.hh"
83#include "sim/syscallreturn.hh"
84#include "sim/system.hh"
85
86///
87/// System call descriptor.
88///
89class SyscallDesc {
90
91 public:
92
93 /// Typedef for target syscall handler functions.
94 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
95 LiveProcess *, ThreadContext *);
96
97 const char *name; //!< Syscall name (e.g., "open").
98 FuncPtr funcPtr; //!< Pointer to emulation function.
99 int flags; //!< Flags (see Flags enum).
100 bool warned; //!< Have we warned about unimplemented syscall?
101
102 /// Flag values for controlling syscall behavior.
103 enum Flags {
104 /// Don't set return regs according to funcPtr return value.
105 /// Used for syscalls with non-standard return conventions
106 /// that explicitly set the ThreadContext regs (e.g.,
107 /// sigreturn).
108 SuppressReturnValue = 1,
109 WarnOnce = 2
110 };
111
112 /// Constructor.
113 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
114 : name(_name), funcPtr(_funcPtr), flags(_flags), warned(false)
115 {
116 }
117
118 /// Emulate the syscall. Public interface for calling through funcPtr.
119 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
120
121 /// Is the WarnOnce flag set?
122 bool warnOnce() const { return (flags & WarnOnce); }
123};
124
125
126//////////////////////////////////////////////////////////////////////
127//
128// The following emulation functions are generic enough that they
129// don't need to be recompiled for different emulated OS's. They are
130// defined in sim/syscall_emul.cc.
131//
132//////////////////////////////////////////////////////////////////////
133
134
135/// Handler for unimplemented syscalls that we haven't thought about.
136SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
137 LiveProcess *p, ThreadContext *tc);
138
139/// Handler for unimplemented syscalls that we never intend to
140/// implement (signal handling, etc.) and should not affect the correct
141/// behavior of the program. Print a warning only if the appropriate
142/// trace flag is enabled. Return success to the target program.
143SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
144 LiveProcess *p, ThreadContext *tc);
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__
2 * Copyright (c) 2012-2013 ARM Limited
3 * Copyright (c) 2015 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Copyright (c) 2003-2005 The Regents of The University of Michigan
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;
22 * redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution;
25 * neither the name of the copyright holders nor the names of its
26 * contributors may be used to endorse or promote products derived from
27 * this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Steve Reinhardt
42 * Kevin Lim
43 */
44
45#ifndef __SIM_SYSCALL_EMUL_HH__
46#define __SIM_SYSCALL_EMUL_HH__
47
48#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
49 defined(__FreeBSD__) || defined(__CYGWIN__) || \
50 defined(__NetBSD__))
51
52///
53/// @file syscall_emul.hh
54///
55/// This file defines objects used to emulate syscalls from the target
56/// application on the host machine.
57
58#ifdef __CYGWIN32__
59#include <sys/fcntl.h> // for O_BINARY
60#endif
61#include <sys/stat.h>
62#include <sys/time.h>
63#include <sys/uio.h>
64#include <fcntl.h>
65
66#include <cerrno>
67#include <string>
68
69#include "base/chunk_generator.hh"
70#include "base/intmath.hh" // for RoundUp
71#include "base/misc.hh"
72#include "base/trace.hh"
73#include "base/types.hh"
74#include "config/the_isa.hh"
75#include "cpu/base.hh"
76#include "cpu/thread_context.hh"
77#include "debug/SyscallVerbose.hh"
78#include "mem/page_table.hh"
79#include "sim/byteswap.hh"
80#include "sim/emul_driver.hh"
81#include "sim/process.hh"
82#include "sim/syscall_emul_buf.hh"
83#include "sim/syscallreturn.hh"
84#include "sim/system.hh"
85
86///
87/// System call descriptor.
88///
89class SyscallDesc {
90
91 public:
92
93 /// Typedef for target syscall handler functions.
94 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
95 LiveProcess *, ThreadContext *);
96
97 const char *name; //!< Syscall name (e.g., "open").
98 FuncPtr funcPtr; //!< Pointer to emulation function.
99 int flags; //!< Flags (see Flags enum).
100 bool warned; //!< Have we warned about unimplemented syscall?
101
102 /// Flag values for controlling syscall behavior.
103 enum Flags {
104 /// Don't set return regs according to funcPtr return value.
105 /// Used for syscalls with non-standard return conventions
106 /// that explicitly set the ThreadContext regs (e.g.,
107 /// sigreturn).
108 SuppressReturnValue = 1,
109 WarnOnce = 2
110 };
111
112 /// Constructor.
113 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
114 : name(_name), funcPtr(_funcPtr), flags(_flags), warned(false)
115 {
116 }
117
118 /// Emulate the syscall. Public interface for calling through funcPtr.
119 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
120
121 /// Is the WarnOnce flag set?
122 bool warnOnce() const { return (flags & WarnOnce); }
123};
124
125
126//////////////////////////////////////////////////////////////////////
127//
128// The following emulation functions are generic enough that they
129// don't need to be recompiled for different emulated OS's. They are
130// defined in sim/syscall_emul.cc.
131//
132//////////////////////////////////////////////////////////////////////
133
134
135/// Handler for unimplemented syscalls that we haven't thought about.
136SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
137 LiveProcess *p, ThreadContext *tc);
138
139/// Handler for unimplemented syscalls that we never intend to
140/// implement (signal handling, etc.) and should not affect the correct
141/// behavior of the program. Print a warning only if the appropriate
142/// trace flag is enabled. Return success to the target program.
143SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
144 LiveProcess *p, ThreadContext *tc);
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__