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 brk() handler: set brk address.
195 SyscallReturn brkFunc(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 getcwd() handler.
227 SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
230 /// Target unlink() handler.
231 SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
234 /// Target unlink() handler.
235 SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
236 LiveProcess *p, ThreadContext *tc);
238 /// Target mkdir() handler.
239 SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
240 LiveProcess *p, ThreadContext *tc);
242 /// Target rename() handler.
243 SyscallReturn renameFunc(SyscallDesc *desc, int num,
244 LiveProcess *p, ThreadContext *tc);
247 /// Target truncate() handler.
248 SyscallReturn truncateFunc(SyscallDesc *desc, int num,
249 LiveProcess *p, ThreadContext *tc);
252 /// Target ftruncate() handler.
253 SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
254 LiveProcess *p, ThreadContext *tc);
257 /// Target umask() handler.
258 SyscallReturn umaskFunc(SyscallDesc *desc, int num,
259 LiveProcess *p, ThreadContext *tc);
262 /// Target chown() handler.
263 SyscallReturn chownFunc(SyscallDesc *desc, int num,
264 LiveProcess *p, ThreadContext *tc);
267 /// Target fchown() handler.
268 SyscallReturn fchownFunc(SyscallDesc *desc, int num,
269 LiveProcess *p, ThreadContext *tc);
271 /// Target dup() handler.
272 SyscallReturn dupFunc(SyscallDesc *desc, int num,
273 LiveProcess *process, ThreadContext *tc);
275 /// Target fnctl() handler.
276 SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
277 LiveProcess *process, ThreadContext *tc);
279 /// Target fcntl64() handler.
280 SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
281 LiveProcess *process, ThreadContext *tc);
283 /// Target setuid() handler.
284 SyscallReturn setuidFunc(SyscallDesc *desc, int num,
285 LiveProcess *p, ThreadContext *tc);
287 /// Target getpid() handler.
288 SyscallReturn getpidFunc(SyscallDesc *desc, int num,
289 LiveProcess *p, ThreadContext *tc);
291 /// Target getuid() handler.
292 SyscallReturn getuidFunc(SyscallDesc *desc, int num,
293 LiveProcess *p, ThreadContext *tc);
295 /// Target getgid() handler.
296 SyscallReturn getgidFunc(SyscallDesc *desc, int num,
297 LiveProcess *p, ThreadContext *tc);
299 /// Target getppid() handler.
300 SyscallReturn getppidFunc(SyscallDesc *desc, int num,
301 LiveProcess *p, ThreadContext *tc);
303 /// Target geteuid() handler.
304 SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
305 LiveProcess *p, ThreadContext *tc);
307 /// Target getegid() handler.
308 SyscallReturn getegidFunc(SyscallDesc *desc, int num,
309 LiveProcess *p, ThreadContext *tc);
313 /// Pseudo Funcs - These functions use a different return convension,
314 /// returning a second value in a register other than the normal return register
315 SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
316 LiveProcess *process, ThreadContext *tc);
318 /// Target getpidPseudo() handler.
319 SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
320 LiveProcess *p, ThreadContext *tc);
322 /// Target getuidPseudo() handler.
323 SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
324 LiveProcess *p, ThreadContext *tc);
326 /// Target getgidPseudo() handler.
327 SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
328 LiveProcess *p, ThreadContext *tc);
331 /// A readable name for 1,000,000, for converting microseconds to seconds.
332 const int one_million = 1000000;
334 /// Approximate seconds since the epoch (1/1/1970). About a billion,
335 /// by my reckoning. We want to keep this a constant (not use the
336 /// real-world time) to keep simulations repeatable.
337 const unsigned seconds_since_epoch = 1000000000;
339 /// Helper function to convert current elapsed time to seconds and
341 template <class T1, class T2>
343 getElapsedTime(T1 &sec, T2 &usec)
345 int elapsed_usecs = curTick / Clock::Int::us;
346 sec = elapsed_usecs / one_million;
347 usec = elapsed_usecs % one_million;
350 //////////////////////////////////////////////////////////////////////
352 // The following emulation functions are generic, but need to be
353 // templated to account for differences in types, constants, etc.
355 //////////////////////////////////////////////////////////////////////
358 typedef struct stat hst_stat;
359 typedef struct stat hst_stat64;
361 typedef struct stat hst_stat;
362 typedef struct stat64 hst_stat64;
365 //// Helper function to convert a host stat buffer to a target stat
366 //// buffer. Also copies the target buffer out to the simulated
367 //// memory space. Used by stat(), fstat(), and lstat().
369 template <typename target_stat, typename host_stat>
371 convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
373 using namespace TheISA;
378 tgt->st_dev = host->st_dev;
379 tgt->st_dev = htog(tgt->st_dev);
380 tgt->st_ino = host->st_ino;
381 tgt->st_ino = htog(tgt->st_ino);
382 tgt->st_mode = host->st_mode;
384 // Claim to be a character device
385 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
386 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
388 tgt->st_mode = htog(tgt->st_mode);
389 tgt->st_nlink = host->st_nlink;
390 tgt->st_nlink = htog(tgt->st_nlink);
391 tgt->st_uid = host->st_uid;
392 tgt->st_uid = htog(tgt->st_uid);
393 tgt->st_gid = host->st_gid;
394 tgt->st_gid = htog(tgt->st_gid);
396 tgt->st_rdev = 0x880d;
398 tgt->st_rdev = host->st_rdev;
399 tgt->st_rdev = htog(tgt->st_rdev);
400 tgt->st_size = host->st_size;
401 tgt->st_size = htog(tgt->st_size);
402 tgt->st_atimeX = host->st_atime;
403 tgt->st_atimeX = htog(tgt->st_atimeX);
404 tgt->st_mtimeX = host->st_mtime;
405 tgt->st_mtimeX = htog(tgt->st_mtimeX);
406 tgt->st_ctimeX = host->st_ctime;
407 tgt->st_ctimeX = htog(tgt->st_ctimeX);
408 // Force the block size to be 8k. This helps to ensure buffered io works
409 // consistently across different hosts.
410 tgt->st_blksize = 0x2000;
411 tgt->st_blksize = htog(tgt->st_blksize);
412 tgt->st_blocks = host->st_blocks;
413 tgt->st_blocks = htog(tgt->st_blocks);
418 template <typename target_stat, typename host_stat64>
420 convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
422 using namespace TheISA;
424 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
425 #if defined(STAT_HAVE_NSEC)
426 tgt->st_atime_nsec = host->st_atime_nsec;
427 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
428 tgt->st_mtime_nsec = host->st_mtime_nsec;
429 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
430 tgt->st_ctime_nsec = host->st_ctime_nsec;
431 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
433 tgt->st_atime_nsec = 0;
434 tgt->st_mtime_nsec = 0;
435 tgt->st_ctime_nsec = 0;
439 //Here are a couple convenience functions
442 copyOutStatBuf(TranslatingPort * mem, Addr addr,
443 hst_stat *host, bool fakeTTY = false)
445 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
446 tgt_stat_buf tgt(addr);
447 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
453 copyOutStat64Buf(TranslatingPort * mem, Addr addr,
454 hst_stat64 *host, bool fakeTTY = false)
456 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
457 tgt_stat_buf tgt(addr);
458 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
462 /// Target ioctl() handler. For the most part, programs call ioctl()
463 /// only to find out if their stdout is a tty, to determine whether to
464 /// do line or block buffering.
467 ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
470 int fd = process->getSyscallArg(tc, 0);
471 unsigned req = process->getSyscallArg(tc, 1);
473 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
475 if (fd < 0 || process->sim_fd(fd) < 0) {
476 // doesn't map to any simulator fd: not a valid target fd
481 case OS::TIOCISATTY_:
492 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
493 fd, req, tc->readPC());
497 /// Target open() handler.
500 openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
505 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
508 if (path == "/dev/sysdev0") {
509 // This is a memory-mapped high-resolution timer device on Alpha.
510 // We don't support it, so just punt.
511 warn("Ignoring open(%s, ...)\n", path);
515 int tgtFlags = process->getSyscallArg(tc, 1);
516 int mode = process->getSyscallArg(tc, 2);
519 // translate open flags
520 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
521 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
522 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
523 hostFlags |= OS::openFlagTable[i].hostFlag;
527 // any target flags left?
529 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
532 hostFlags |= O_BINARY;
535 // Adjust path for current working directory
536 path = process->fullPath(path);
538 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
541 if (!path.compare(0, 6, "/proc/") || !path.compare(0, 8, "/system/") ||
542 !path.compare(0, 10, "/platform/") || !path.compare(0, 5, "/sys/")) {
543 // It's a proc/sys entery and requires special handling
544 fd = OS::openSpecialFile(path, process, tc);
545 return (fd == -1) ? -1 : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
548 fd = open(path.c_str(), hostFlags, mode);
549 return (fd == -1) ? -errno : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
555 /// Target chmod() handler.
558 chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
563 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
566 uint32_t mode = process->getSyscallArg(tc, 1);
569 // XXX translate mode flags via OS::something???
572 // Adjust path for current working directory
573 path = process->fullPath(path);
576 int result = chmod(path.c_str(), hostMode);
584 /// Target fchmod() handler.
587 fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
590 int fd = process->getSyscallArg(tc, 0);
591 if (fd < 0 || process->sim_fd(fd) < 0) {
592 // doesn't map to any simulator fd: not a valid target fd
596 uint32_t mode = process->getSyscallArg(tc, 1);
599 // XXX translate mode flags via OS::someting???
603 int result = fchmod(process->sim_fd(fd), hostMode);
610 /// Target mremap() handler.
613 mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
615 Addr start = process->getSyscallArg(tc, 0);
616 uint64_t old_length = process->getSyscallArg(tc, 1);
617 uint64_t new_length = process->getSyscallArg(tc, 2);
618 uint64_t flags = process->getSyscallArg(tc, 3);
620 if ((start % TheISA::VMPageSize != 0) ||
621 (new_length % TheISA::VMPageSize != 0)) {
622 warn("mremap failing: arguments not page aligned");
626 if (new_length > old_length) {
627 if ((start + old_length) == process->mmap_end) {
628 uint64_t diff = new_length - old_length;
629 process->pTable->allocate(process->mmap_end, diff);
630 process->mmap_end += diff;
633 // sys/mman.h defined MREMAP_MAYMOVE
635 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
638 process->pTable->remap(start, old_length, process->mmap_end);
639 warn("mremapping to totally new vaddr %08p-%08p, adding %d\n",
640 process->mmap_end, process->mmap_end + new_length, new_length);
641 start = process->mmap_end;
642 // add on the remaining unallocated pages
643 process->pTable->allocate(start + old_length, new_length - old_length);
644 process->mmap_end += new_length;
645 warn("returning %08p as start\n", start);
650 process->pTable->deallocate(start + new_length, old_length -
656 /// Target stat() handler.
659 statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
664 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
667 // Adjust path for current working directory
668 path = process->fullPath(path);
671 int result = stat(path.c_str(), &hostBuf);
676 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
683 /// Target stat64() handler.
686 stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
691 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
694 // Adjust path for current working directory
695 path = process->fullPath(path);
699 int result = stat(path.c_str(), &hostBuf);
701 struct stat64 hostBuf;
702 int result = stat64(path.c_str(), &hostBuf);
708 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
715 /// Target fstat64() handler.
718 fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
721 int fd = process->getSyscallArg(tc, 0);
722 if (fd < 0 || process->sim_fd(fd) < 0) {
723 // doesn't map to any simulator fd: not a valid target fd
729 int result = fstat(process->sim_fd(fd), &hostBuf);
731 struct stat64 hostBuf;
732 int result = fstat64(process->sim_fd(fd), &hostBuf);
738 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
739 &hostBuf, (fd == 1));
745 /// Target lstat() handler.
748 lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
753 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
756 // Adjust path for current working directory
757 path = process->fullPath(path);
760 int result = lstat(path.c_str(), &hostBuf);
765 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
771 /// Target lstat64() handler.
774 lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
779 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
782 // Adjust path for current working directory
783 path = process->fullPath(path);
787 int result = lstat(path.c_str(), &hostBuf);
789 struct stat64 hostBuf;
790 int result = lstat64(path.c_str(), &hostBuf);
796 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
802 /// Target fstat() handler.
805 fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
808 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
810 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
816 int result = fstat(fd, &hostBuf);
821 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
822 &hostBuf, (fd == 1));
828 /// Target statfs() handler.
831 statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
836 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
839 // Adjust path for current working directory
840 path = process->fullPath(path);
842 struct statfs hostBuf;
843 int result = statfs(path.c_str(), &hostBuf);
848 OS::copyOutStatfsBuf(tc->getMemPort(),
849 (Addr)(process->getSyscallArg(tc, 1)), &hostBuf);
855 /// Target fstatfs() handler.
858 fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
861 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
866 struct statfs hostBuf;
867 int result = fstatfs(fd, &hostBuf);
872 OS::copyOutStatfsBuf(tc->getMemPort(), process->getSyscallArg(tc, 1),
879 /// Target writev() handler.
882 writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
885 int fd = process->getSyscallArg(tc, 0);
886 if (fd < 0 || process->sim_fd(fd) < 0) {
887 // doesn't map to any simulator fd: not a valid target fd
891 TranslatingPort *p = tc->getMemPort();
892 uint64_t tiov_base = process->getSyscallArg(tc, 1);
893 size_t count = process->getSyscallArg(tc, 2);
894 struct iovec hiov[count];
895 for (int i = 0; i < count; ++i)
897 typename OS::tgt_iovec tiov;
899 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
900 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
901 hiov[i].iov_len = gtoh(tiov.iov_len);
902 hiov[i].iov_base = new char [hiov[i].iov_len];
903 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
907 int result = writev(process->sim_fd(fd), hiov, count);
909 for (int i = 0; i < count; ++i)
911 delete [] (char *)hiov[i].iov_base;
921 /// Target mmap() handler.
923 /// We don't really handle mmap(). If the target is mmaping an
924 /// anonymous region or /dev/zero, we can get away with doing basically
925 /// nothing (since memory is initialized to zero and the simulator
926 /// doesn't really check addresses anyway). Always print a warning,
927 /// since this could be seriously broken if we're not mapping
930 /// Someday we should explicitly check for /dev/zero in open, flag the
931 /// file descriptor, and fail (or implement!) a non-anonymous mmap to
935 mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
937 Addr start = p->getSyscallArg(tc, 0);
938 uint64_t length = p->getSyscallArg(tc, 1);
939 // int prot = p->getSyscallArg(tc, 2);
940 int flags = p->getSyscallArg(tc, 3);
941 // int fd = p->sim_fd(p->getSyscallArg(tc, 4));
942 // int offset = p->getSyscallArg(tc, 5);
945 if ((start % TheISA::VMPageSize) != 0 ||
946 (length % TheISA::VMPageSize) != 0) {
947 warn("mmap failing: arguments not page-aligned: "
948 "start 0x%x length 0x%x",
954 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
958 // pick next address from our "mmap region"
960 p->pTable->allocate(start, length);
961 p->mmap_end += length;
963 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
964 warn("allowing mmap of file @ fd %d. "
965 "This will break if not /dev/zero.", p->getSyscallArg(tc, 4));
971 /// Target getrlimit() handler.
974 getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
977 unsigned resource = process->getSyscallArg(tc, 0);
978 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, 1));
981 case OS::TGT_RLIMIT_STACK:
982 // max stack size in bytes: make up a number (8MB for now)
983 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
984 rlp->rlim_cur = htog(rlp->rlim_cur);
985 rlp->rlim_max = htog(rlp->rlim_max);
988 case OS::TGT_RLIMIT_DATA:
989 // max data segment size in bytes: make up a number
990 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
991 rlp->rlim_cur = htog(rlp->rlim_cur);
992 rlp->rlim_max = htog(rlp->rlim_max);
996 std::cerr << "getrlimitFunc: unimplemented resource " << resource
1002 rlp.copyOut(tc->getMemPort());
1006 /// Target gettimeofday() handler.
1009 gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1012 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, 0));
1014 getElapsedTime(tp->tv_sec, tp->tv_usec);
1015 tp->tv_sec += seconds_since_epoch;
1016 tp->tv_sec = htog(tp->tv_sec);
1017 tp->tv_usec = htog(tp->tv_usec);
1019 tp.copyOut(tc->getMemPort());
1025 /// Target utimes() handler.
1028 utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1033 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
1036 TypedBufferArg<typename OS::timeval [2]> tp(process->getSyscallArg(tc, 1));
1037 tp.copyIn(tc->getMemPort());
1039 struct timeval hostTimeval[2];
1040 for (int i = 0; i < 2; ++i)
1042 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
1043 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
1046 // Adjust path for current working directory
1047 path = process->fullPath(path);
1049 int result = utimes(path.c_str(), hostTimeval);
1056 /// Target getrusage() function.
1059 getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1062 int who = process->getSyscallArg(tc, 0); // THREAD, SELF, or CHILDREN
1063 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, 1));
1065 rup->ru_utime.tv_sec = 0;
1066 rup->ru_utime.tv_usec = 0;
1067 rup->ru_stime.tv_sec = 0;
1068 rup->ru_stime.tv_usec = 0;
1076 rup->ru_inblock = 0;
1077 rup->ru_oublock = 0;
1080 rup->ru_nsignals = 0;
1085 case OS::TGT_RUSAGE_SELF:
1086 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1087 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1088 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1091 case OS::TGT_RUSAGE_CHILDREN:
1092 // do nothing. We have no child processes, so they take no time.
1096 // don't really handle THREAD or CHILDREN, but just warn and
1098 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1102 rup.copyOut(tc->getMemPort());
1110 #endif // __SIM_SYSCALL_EMUL_HH__