2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Steve Reinhardt
32 #ifndef __SIM_SYSCALL_EMUL_HH__
33 #define __SIM_SYSCALL_EMUL_HH__
35 #define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
36 defined(__FreeBSD__) || defined(__CYGWIN__))
39 /// @file syscall_emul.hh
41 /// This file defines objects used to emulate syscalls from the target
42 /// application on the host machine.
47 #include <sys/fcntl.h> // for O_BINARY
53 #include "sim/host.hh" // for Addr
54 #include "base/chunk_generator.hh"
55 #include "base/intmath.hh" // for RoundUp
56 #include "base/misc.hh"
57 #include "base/trace.hh"
58 #include "cpu/base.hh"
59 #include "cpu/thread_context.hh"
60 #include "mem/translating_port.hh"
61 #include "mem/page_table.hh"
62 #include "sim/process.hh"
65 /// System call descriptor.
71 /// Typedef for target syscall handler functions.
72 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
73 LiveProcess *, ThreadContext *);
75 const char *name; //!< Syscall name (e.g., "open").
76 FuncPtr funcPtr; //!< Pointer to emulation function.
77 int flags; //!< Flags (see Flags enum).
79 /// Flag values for controlling syscall behavior.
81 /// Don't set return regs according to funcPtr return value.
82 /// Used for syscalls with non-standard return conventions
83 /// that explicitly set the ThreadContext regs (e.g.,
85 SuppressReturnValue = 1
89 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
90 : name(_name), funcPtr(_funcPtr), flags(_flags)
94 /// Emulate the syscall. Public interface for calling through funcPtr.
95 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
103 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
105 bufPtr = new uint8_t[size];
106 // clear out buffer: in case we only partially populate this,
107 // and then do a copyOut(), we want to make sure we don't
108 // introduce any random junk into the simulated address space
109 memset(bufPtr, 0, size);
112 virtual ~BaseBufferArg() { delete [] bufPtr; }
115 // copy data into simulator space (read from target memory)
117 virtual bool copyIn(TranslatingPort *memport)
119 memport->readBlob(addr, bufPtr, size);
120 return true; // no EFAULT detection for now
124 // copy data out of simulator space (write to target memory)
126 virtual bool copyOut(TranslatingPort *memport)
128 memport->writeBlob(addr, bufPtr, size);
129 return true; // no EFAULT detection for now
139 class BufferArg : public BaseBufferArg
142 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
143 void *bufferPtr() { return bufPtr; }
147 class TypedBufferArg : public BaseBufferArg
150 // user can optionally specify a specific number of bytes to
151 // allocate to deal with those structs that have variable-size
153 TypedBufferArg(Addr _addr, int _size = sizeof(T))
154 : BaseBufferArg(_addr, _size)
158 operator T*() { return (T *)bufPtr; }
160 // dereference operators
161 T &operator*() { return *((T *)bufPtr); }
162 T* operator->() { return (T *)bufPtr; }
163 T &operator[](int i) { return ((T *)bufPtr)[i]; }
166 //////////////////////////////////////////////////////////////////////
168 // The following emulation functions are generic enough that they
169 // don't need to be recompiled for different emulated OS's. They are
170 // defined in sim/syscall_emul.cc.
172 //////////////////////////////////////////////////////////////////////
175 /// Handler for unimplemented syscalls that we haven't thought about.
176 SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
177 LiveProcess *p, ThreadContext *tc);
179 /// Handler for unimplemented syscalls that we never intend to
180 /// implement (signal handling, etc.) and should not affect the correct
181 /// behavior of the program. Print a warning only if the appropriate
182 /// trace flag is enabled. Return success to the target program.
183 SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
184 LiveProcess *p, ThreadContext *tc);
186 /// Target exit() handler: terminate simulation.
187 SyscallReturn exitFunc(SyscallDesc *desc, int num,
188 LiveProcess *p, ThreadContext *tc);
190 /// Target getpagesize() handler.
191 SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
192 LiveProcess *p, ThreadContext *tc);
194 /// Target obreak() handler: set brk address.
195 SyscallReturn obreakFunc(SyscallDesc *desc, int num,
196 LiveProcess *p, ThreadContext *tc);
198 /// Target close() handler.
199 SyscallReturn closeFunc(SyscallDesc *desc, int num,
200 LiveProcess *p, ThreadContext *tc);
202 /// Target read() handler.
203 SyscallReturn readFunc(SyscallDesc *desc, int num,
204 LiveProcess *p, ThreadContext *tc);
206 /// Target write() handler.
207 SyscallReturn writeFunc(SyscallDesc *desc, int num,
208 LiveProcess *p, ThreadContext *tc);
210 /// Target lseek() handler.
211 SyscallReturn lseekFunc(SyscallDesc *desc, int num,
212 LiveProcess *p, ThreadContext *tc);
214 /// Target _llseek() handler.
215 SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
216 LiveProcess *p, ThreadContext *tc);
218 /// Target munmap() handler.
219 SyscallReturn munmapFunc(SyscallDesc *desc, int num,
220 LiveProcess *p, ThreadContext *tc);
222 /// Target gethostname() handler.
223 SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
224 LiveProcess *p, ThreadContext *tc);
226 /// Target unlink() handler.
227 SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
230 /// Target rename() handler.
231 SyscallReturn renameFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
235 /// Target truncate() handler.
236 SyscallReturn truncateFunc(SyscallDesc *desc, int num,
237 LiveProcess *p, ThreadContext *tc);
240 /// Target ftruncate() handler.
241 SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
242 LiveProcess *p, ThreadContext *tc);
245 /// Target chown() handler.
246 SyscallReturn chownFunc(SyscallDesc *desc, int num,
247 LiveProcess *p, ThreadContext *tc);
250 /// Target fchown() handler.
251 SyscallReturn fchownFunc(SyscallDesc *desc, int num,
252 LiveProcess *p, ThreadContext *tc);
254 /// Target dup() handler.
255 SyscallReturn dupFunc(SyscallDesc *desc, int num,
256 LiveProcess *process, ThreadContext *tc);
258 /// Target fnctl() handler.
259 SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
260 LiveProcess *process, ThreadContext *tc);
262 /// Target fcntl64() handler.
263 SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
264 LiveProcess *process, ThreadContext *tc);
266 /// Target setuid() handler.
267 SyscallReturn setuidFunc(SyscallDesc *desc, int num,
268 LiveProcess *p, ThreadContext *tc);
270 /// Target getpid() handler.
271 SyscallReturn getpidFunc(SyscallDesc *desc, int num,
272 LiveProcess *p, ThreadContext *tc);
274 /// Target getuid() handler.
275 SyscallReturn getuidFunc(SyscallDesc *desc, int num,
276 LiveProcess *p, ThreadContext *tc);
278 /// Target getgid() handler.
279 SyscallReturn getgidFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
282 /// Target getppid() handler.
283 SyscallReturn getppidFunc(SyscallDesc *desc, int num,
284 LiveProcess *p, ThreadContext *tc);
286 /// Target geteuid() handler.
287 SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
288 LiveProcess *p, ThreadContext *tc);
290 /// Target getegid() handler.
291 SyscallReturn getegidFunc(SyscallDesc *desc, int num,
292 LiveProcess *p, ThreadContext *tc);
296 /// Pseudo Funcs - These functions use a different return convension,
297 /// returning a second value in a register other than the normal return register
298 SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
299 LiveProcess *process, ThreadContext *tc);
301 /// Target getpidPseudo() handler.
302 SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
303 LiveProcess *p, ThreadContext *tc);
305 /// Target getuidPseudo() handler.
306 SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
307 LiveProcess *p, ThreadContext *tc);
309 /// Target getgidPseudo() handler.
310 SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
311 LiveProcess *p, ThreadContext *tc);
314 /// A readable name for 1,000,000, for converting microseconds to seconds.
315 const int one_million = 1000000;
317 /// Approximate seconds since the epoch (1/1/1970). About a billion,
318 /// by my reckoning. We want to keep this a constant (not use the
319 /// real-world time) to keep simulations repeatable.
320 const unsigned seconds_since_epoch = 1000000000;
322 /// Helper function to convert current elapsed time to seconds and
324 template <class T1, class T2>
326 getElapsedTime(T1 &sec, T2 &usec)
328 int elapsed_usecs = curTick / Clock::Int::us;
329 sec = elapsed_usecs / one_million;
330 usec = elapsed_usecs % one_million;
333 //////////////////////////////////////////////////////////////////////
335 // The following emulation functions are generic, but need to be
336 // templated to account for differences in types, constants, etc.
338 //////////////////////////////////////////////////////////////////////
341 typedef struct stat hst_stat;
342 typedef struct stat hst_stat64;
344 typedef struct stat hst_stat;
345 typedef struct stat64 hst_stat64;
348 //// Helper function to convert a host stat buffer to a target stat
349 //// buffer. Also copies the target buffer out to the simulated
350 //// memory space. Used by stat(), fstat(), and lstat().
352 template <typename target_stat, typename host_stat>
354 convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
356 using namespace TheISA;
361 tgt->st_dev = host->st_dev;
362 tgt->st_dev = htog(tgt->st_dev);
363 tgt->st_ino = host->st_ino;
364 tgt->st_ino = htog(tgt->st_ino);
365 tgt->st_mode = host->st_mode;
366 tgt->st_mode = htog(tgt->st_mode);
367 tgt->st_nlink = host->st_nlink;
368 tgt->st_nlink = htog(tgt->st_nlink);
369 tgt->st_uid = host->st_uid;
370 tgt->st_uid = htog(tgt->st_uid);
371 tgt->st_gid = host->st_gid;
372 tgt->st_gid = htog(tgt->st_gid);
374 tgt->st_rdev = 0x880d;
376 tgt->st_rdev = host->st_rdev;
377 tgt->st_rdev = htog(tgt->st_rdev);
378 tgt->st_size = host->st_size;
379 tgt->st_size = htog(tgt->st_size);
380 tgt->st_atimeX = host->st_atime;
381 tgt->st_atimeX = htog(tgt->st_atimeX);
382 tgt->st_mtimeX = host->st_mtime;
383 tgt->st_mtimeX = htog(tgt->st_mtimeX);
384 tgt->st_ctimeX = host->st_ctime;
385 tgt->st_ctimeX = htog(tgt->st_ctimeX);
386 // Force the block size to be 8k. This helps to ensure buffered io works
387 // consistently across different hosts.
388 tgt->st_blksize = 0x2000;
389 tgt->st_blksize = htog(tgt->st_blksize);
390 tgt->st_blocks = host->st_blocks;
391 tgt->st_blocks = htog(tgt->st_blocks);
396 template <typename target_stat, typename host_stat64>
398 convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
400 using namespace TheISA;
402 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
403 #if defined(STAT_HAVE_NSEC)
404 tgt->st_atime_nsec = host->st_atime_nsec;
405 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
406 tgt->st_mtime_nsec = host->st_mtime_nsec;
407 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
408 tgt->st_ctime_nsec = host->st_ctime_nsec;
409 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
411 tgt->st_atime_nsec = 0;
412 tgt->st_mtime_nsec = 0;
413 tgt->st_ctime_nsec = 0;
417 //Here are a couple convenience functions
420 copyOutStatBuf(TranslatingPort * mem, Addr addr,
421 hst_stat *host, bool fakeTTY = false)
423 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
424 tgt_stat_buf tgt(addr);
425 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
431 copyOutStat64Buf(TranslatingPort * mem, Addr addr,
432 hst_stat64 *host, bool fakeTTY = false)
434 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
435 tgt_stat_buf tgt(addr);
436 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
440 /// Target ioctl() handler. For the most part, programs call ioctl()
441 /// only to find out if their stdout is a tty, to determine whether to
442 /// do line or block buffering.
445 ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
448 int fd = tc->getSyscallArg(0);
449 unsigned req = tc->getSyscallArg(1);
451 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
453 if (fd < 0 || process->sim_fd(fd) < 0) {
454 // doesn't map to any simulator fd: not a valid target fd
459 case OS::TIOCISATTY_:
470 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
471 fd, req, tc->readPC());
475 /// Target open() handler.
478 openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
483 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
486 if (path == "/dev/sysdev0") {
487 // This is a memory-mapped high-resolution timer device on Alpha.
488 // We don't support it, so just punt.
489 warn("Ignoring open(%s, ...)\n", path);
493 int tgtFlags = tc->getSyscallArg(1);
494 int mode = tc->getSyscallArg(2);
497 // translate open flags
498 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
499 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
500 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
501 hostFlags |= OS::openFlagTable[i].hostFlag;
505 // any target flags left?
507 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
510 hostFlags |= O_BINARY;
513 // Adjust path for current working directory
514 path = process->fullPath(path);
516 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
519 int fd = open(path.c_str(), hostFlags, mode);
521 return (fd == -1) ? -errno : process->alloc_fd(fd);
525 /// Target chmod() handler.
528 chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
533 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
536 uint32_t mode = tc->getSyscallArg(1);
539 // XXX translate mode flags via OS::something???
542 // Adjust path for current working directory
543 path = process->fullPath(path);
546 int result = chmod(path.c_str(), hostMode);
554 /// Target fchmod() handler.
557 fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
560 int fd = tc->getSyscallArg(0);
561 if (fd < 0 || process->sim_fd(fd) < 0) {
562 // doesn't map to any simulator fd: not a valid target fd
566 uint32_t mode = tc->getSyscallArg(1);
569 // XXX translate mode flags via OS::someting???
573 int result = fchmod(process->sim_fd(fd), hostMode);
581 /// Target stat() handler.
584 statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
589 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
592 // Adjust path for current working directory
593 path = process->fullPath(path);
596 int result = stat(path.c_str(), &hostBuf);
601 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
607 /// Target fstat64() handler.
610 fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
613 int fd = tc->getSyscallArg(0);
614 if (fd < 0 || process->sim_fd(fd) < 0) {
615 // doesn't map to any simulator fd: not a valid target fd
621 int result = fstat(process->sim_fd(fd), &hostBuf);
623 struct stat64 hostBuf;
624 int result = fstat64(process->sim_fd(fd), &hostBuf);
630 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
631 &hostBuf, (fd == 1));
637 /// Target lstat() handler.
640 lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
645 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
648 // Adjust path for current working directory
649 path = process->fullPath(path);
652 int result = lstat(path.c_str(), &hostBuf);
657 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
662 /// Target lstat64() handler.
665 lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
670 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
673 // Adjust path for current working directory
674 path = process->fullPath(path);
678 int result = lstat(path.c_str(), &hostBuf);
680 struct stat64 hostBuf;
681 int result = lstat64(path.c_str(), &hostBuf);
687 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
692 /// Target fstat() handler.
695 fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
698 int fd = process->sim_fd(tc->getSyscallArg(0));
700 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
706 int result = fstat(fd, &hostBuf);
711 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
712 &hostBuf, (fd == 1));
718 /// Target statfs() handler.
721 statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
726 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
729 // Adjust path for current working directory
730 path = process->fullPath(path);
732 struct statfs hostBuf;
733 int result = statfs(path.c_str(), &hostBuf);
738 OS::copyOutStatfsBuf(tc->getMemPort(),
739 (Addr)(tc->getSyscallArg(1)), &hostBuf);
745 /// Target fstatfs() handler.
748 fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
751 int fd = process->sim_fd(tc->getSyscallArg(0));
756 struct statfs hostBuf;
757 int result = fstatfs(fd, &hostBuf);
762 OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
769 /// Target writev() handler.
772 writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
775 int fd = tc->getSyscallArg(0);
776 if (fd < 0 || process->sim_fd(fd) < 0) {
777 // doesn't map to any simulator fd: not a valid target fd
781 TranslatingPort *p = tc->getMemPort();
782 uint64_t tiov_base = tc->getSyscallArg(1);
783 size_t count = tc->getSyscallArg(2);
784 struct iovec hiov[count];
785 for (int i = 0; i < count; ++i)
787 typename OS::tgt_iovec tiov;
789 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
790 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
791 hiov[i].iov_len = gtoh(tiov.iov_len);
792 hiov[i].iov_base = new char [hiov[i].iov_len];
793 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
797 int result = writev(process->sim_fd(fd), hiov, count);
799 for (int i = 0; i < count; ++i)
801 delete [] (char *)hiov[i].iov_base;
811 /// Target mmap() handler.
813 /// We don't really handle mmap(). If the target is mmaping an
814 /// anonymous region or /dev/zero, we can get away with doing basically
815 /// nothing (since memory is initialized to zero and the simulator
816 /// doesn't really check addresses anyway). Always print a warning,
817 /// since this could be seriously broken if we're not mapping
820 /// Someday we should explicitly check for /dev/zero in open, flag the
821 /// file descriptor, and fail (or implement!) a non-anonymous mmap to
825 mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
827 Addr start = tc->getSyscallArg(0);
828 uint64_t length = tc->getSyscallArg(1);
829 // int prot = tc->getSyscallArg(2);
830 int flags = tc->getSyscallArg(3);
831 // int fd = p->sim_fd(tc->getSyscallArg(4));
832 // int offset = tc->getSyscallArg(5);
834 if ((start % TheISA::VMPageSize) != 0 ||
835 (length % TheISA::VMPageSize) != 0) {
836 warn("mmap failing: arguments not page-aligned: "
837 "start 0x%x length 0x%x",
843 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
847 // pick next address from our "mmap region"
849 p->pTable->allocate(start, length);
850 p->mmap_end += length;
852 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
853 warn("allowing mmap of file @ fd %d. "
854 "This will break if not /dev/zero.", tc->getSyscallArg(4));
860 /// Target getrlimit() handler.
863 getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
866 unsigned resource = tc->getSyscallArg(0);
867 TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
870 case OS::TGT_RLIMIT_STACK:
871 // max stack size in bytes: make up a number (2MB for now)
872 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
873 rlp->rlim_cur = htog(rlp->rlim_cur);
874 rlp->rlim_max = htog(rlp->rlim_max);
878 std::cerr << "getrlimitFunc: unimplemented resource " << resource
884 rlp.copyOut(tc->getMemPort());
888 /// Target gettimeofday() handler.
891 gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
894 TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
896 getElapsedTime(tp->tv_sec, tp->tv_usec);
897 tp->tv_sec += seconds_since_epoch;
898 tp->tv_sec = htog(tp->tv_sec);
899 tp->tv_usec = htog(tp->tv_usec);
901 tp.copyOut(tc->getMemPort());
907 /// Target utimes() handler.
910 utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
915 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
918 TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
919 tp.copyIn(tc->getMemPort());
921 struct timeval hostTimeval[2];
922 for (int i = 0; i < 2; ++i)
924 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
925 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
928 // Adjust path for current working directory
929 path = process->fullPath(path);
931 int result = utimes(path.c_str(), hostTimeval);
938 /// Target getrusage() function.
941 getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
944 int who = tc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
945 TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
947 rup->ru_utime.tv_sec = 0;
948 rup->ru_utime.tv_usec = 0;
949 rup->ru_stime.tv_sec = 0;
950 rup->ru_stime.tv_usec = 0;
962 rup->ru_nsignals = 0;
967 case OS::TGT_RUSAGE_SELF:
968 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
969 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
970 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
973 case OS::TGT_RUSAGE_CHILDREN:
974 // do nothing. We have no child processes, so they take no time.
978 // don't really handle THREAD or CHILDREN, but just warn and
980 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
984 rup.copyOut(tc->getMemPort());
992 #endif // __SIM_SYSCALL_EMUL_HH__