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syscall_emul.hh
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1/*
2 * Copyright (c) 2012-2013, 2015, 2019-2021, 2023-2024 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
42#ifndef __SIM_SYSCALL_EMUL_HH__
43#define __SIM_SYSCALL_EMUL_HH__
44
45#if (defined(__APPLE__) || defined(__OpenBSD__) || \
46 defined(__FreeBSD__) || defined(__CYGWIN__) || \
47 defined(__NetBSD__))
48#define NO_STAT64 1
49#else
50#define NO_STAT64 0
51#endif
52
58
59#if defined(__linux__)
60#include <linux/kdev_t.h>
61#include <sched.h>
62#include <sys/eventfd.h>
63#include <sys/statfs.h>
64
65#else
66#include <sys/mount.h>
67
68#endif
69
70#ifdef __CYGWIN32__
71#include <sys/fcntl.h>
72
73#endif
74#include <fcntl.h>
75#include <net/if.h>
76#include <poll.h>
77#include <sys/ioctl.h>
78#include <sys/mman.h>
79#include <sys/socket.h>
80#include <sys/stat.h>
81#include <sys/time.h>
82#include <sys/types.h>
83#include <sys/uio.h>
84#include <unistd.h>
85
86#include <cerrno>
87#include <memory>
88#include <string>
89
90#include "arch/generic/tlb.hh"
91#include "base/intmath.hh"
92#include "base/loader/object_file.hh"
93#include "base/logging.hh"
94#include "base/random.hh"
95#include "base/trace.hh"
96#include "base/types.hh"
97#include "cpu/base.hh"
98#include "cpu/thread_context.hh"
99#include "kern/linux/linux.hh"
100#include "mem/page_table.hh"
101#include "mem/se_translating_port_proxy.hh"
102#include "params/Process.hh"
103#include "sim/emul_driver.hh"
104#include "sim/futex_map.hh"
105#include "sim/guest_abi.hh"
106#include "sim/process.hh"
107#include "sim/proxy_ptr.hh"
108#include "sim/syscall_debug_macros.hh"
109#include "sim/syscall_desc.hh"
110#include "sim/syscall_emul_buf.hh"
111#include "sim/syscall_return.hh"
112
113#if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN)
114#define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1))
115#elif defined(__FreeBSD__) && !defined(CMSG_ALIGN)
116#define CMSG_ALIGN(n) _ALIGN(n)
117#endif
118
119namespace gem5
120{
121
123//
124// The following emulation functions are generic enough that they
125// don't need to be recompiled for different emulated OS's. They are
126// defined in sim/syscall_emul.cc.
127//
129
130void warnUnsupportedOS(std::string syscall_name);
131
133SyscallReturn unimplementedFunc(SyscallDesc *desc, ThreadContext *tc);
134
139SyscallReturn ignoreFunc(SyscallDesc *desc, ThreadContext *tc);
141SyscallReturn
142ignoreWarnOnceFunc(SyscallDesc *desc, ThreadContext *tc);
143
145SyscallReturn exitFunc(SyscallDesc *desc, ThreadContext *tc, int status);
146
148SyscallReturn exitGroupFunc(SyscallDesc *desc, ThreadContext *tc, int status);
149
151SyscallReturn setTidAddressFunc(SyscallDesc *desc, ThreadContext *tc,
152 VPtr<> tidPtr);
153
155SyscallReturn getpagesizeFunc(SyscallDesc *desc, ThreadContext *tc);
156
158SyscallReturn brkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> new_brk);
159
161SyscallReturn closeFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd);
162
164SyscallReturn _llseekFunc(SyscallDesc *desc, ThreadContext *tc,
165 int tgt_fd, uint32_t offset_high,
166 uint32_t offset_low, VPtr<> result_ptr, int whence);
167
169SyscallReturn shutdownFunc(SyscallDesc *desc, ThreadContext *tc,
170 int tgt_fd, int how);
171
173SyscallReturn gethostnameFunc(SyscallDesc *desc, ThreadContext *tc,
174 VPtr<> buf_ptr, int name_len);
175
177SyscallReturn unlinkFunc(SyscallDesc *desc, ThreadContext *tc,
178 VPtr<> pathname);
179SyscallReturn unlinkImpl(SyscallDesc *desc, ThreadContext *tc,
180 std::string path);
181
183SyscallReturn linkFunc(SyscallDesc *desc, ThreadContext *tc,
184 VPtr<> pathname, VPtr<> new_pathname);
185
187SyscallReturn symlinkFunc(SyscallDesc *desc, ThreadContext *tc,
188 VPtr<> pathname, VPtr<> new_pathname);
189
191SyscallReturn mkdirFunc(SyscallDesc *desc, ThreadContext *tc,
192 VPtr<> pathname, mode_t mode);
193SyscallReturn mkdirImpl(SyscallDesc *desc, ThreadContext *tc,
194 std::string path, mode_t mode);
195
197SyscallReturn mknodFunc(SyscallDesc *desc, ThreadContext *tc,
198 VPtr<> pathname, mode_t mode, dev_t dev);
199SyscallReturn mknodImpl(SyscallDesc *desc, ThreadContext *tc,
200 std::string path, mode_t mode, dev_t dev);
201
203SyscallReturn chdirFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname);
204
205// Target rmdir() handler.
206SyscallReturn rmdirFunc(SyscallDesc *desc, ThreadContext *tc,
207 VPtr<> pathname);
208SyscallReturn rmdirImpl(SyscallDesc *desc, ThreadContext *tc,
209 std::string path);
210
212SyscallReturn renameFunc(SyscallDesc *desc, ThreadContext *tc,
213 VPtr<> oldpath, VPtr<> newpath);
214SyscallReturn renameImpl(SyscallDesc *desc, ThreadContext *tc,
215 std::string oldpath, std::string newpath);
216
218SyscallReturn truncate64Func(SyscallDesc *desc, ThreadContext *tc,
219 VPtr<> pathname, int64_t length);
220
222SyscallReturn ftruncate64Func(SyscallDesc *desc, ThreadContext *tc,
223 int tgt_fd, int64_t length);
224
226SyscallReturn umaskFunc(SyscallDesc *desc, ThreadContext *tc);
227
229SyscallReturn gettidFunc(SyscallDesc *desc, ThreadContext *tc);
230
232SyscallReturn chownFunc(SyscallDesc *desc, ThreadContext *tc,
233 VPtr<> pathname, uint32_t owner, uint32_t group);
234SyscallReturn chownImpl(SyscallDesc *desc, ThreadContext *tc,
235 std::string path, uint32_t owner, uint32_t group);
236
238SyscallReturn getpgrpFunc(SyscallDesc *desc, ThreadContext *tc);
239
241SyscallReturn setpgidFunc(SyscallDesc *desc, ThreadContext *tc,
242 int pid, int pgid);
243
245SyscallReturn fchownFunc(SyscallDesc *desc, ThreadContext *tc,
246 int tgt_fd, uint32_t owner, uint32_t group);
247
249SyscallReturn dupFunc(SyscallDesc *desc, ThreadContext *tc,
250 int tgt_fd);
251
253SyscallReturn dup2Func(SyscallDesc *desc, ThreadContext *tc,
254 int old_tgt_fd, int new_tgt_fd);
255
257SyscallReturn fcntlFunc(SyscallDesc *desc, ThreadContext *tc,
258 int tgt_fd, int cmd, guest_abi::VarArgs<int> varargs);
259
261SyscallReturn fcntl64Func(SyscallDesc *desc, ThreadContext *tc,
262 int tgt_fd, int cmd);
263
265SyscallReturn pipeFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> tgt_addr);
266
268SyscallReturn pipe2Func(SyscallDesc *desc, ThreadContext *tc,
269 VPtr<> tgt_addr, int flags);
270
272SyscallReturn getpidFunc(SyscallDesc *desc, ThreadContext *tc);
273
274// Target getpeername() handler.
275SyscallReturn getpeernameFunc(SyscallDesc *desc, ThreadContext *tc,
276 int tgt_fd, VPtr<> sockAddrPtr,
277 VPtr<> addrlenPtr);
278
279// Target bind() handler.
280SyscallReturn bindFunc(SyscallDesc *desc, ThreadContext *tc,
281 int tgt_fd, VPtr<> buf_ptr, int addrlen);
282
283// Target listen() handler.
284SyscallReturn listenFunc(SyscallDesc *desc, ThreadContext *tc,
285 int tgt_fd, int backlog);
286
287// Target connect() handler.
288SyscallReturn connectFunc(SyscallDesc *desc, ThreadContext *tc,
289 int tgt_fd, VPtr<> buf_ptr, int addrlen);
290
291#if defined(SYS_getdents)
292// Target getdents() handler.
293SyscallReturn getdentsFunc(SyscallDesc *desc, ThreadContext *tc,
294 int tgt_fd, VPtr<> buf_ptr, unsigned count);
295#endif
296
297#if defined(SYS_getdents64)
298// Target getdents() handler.
299SyscallReturn getdents64Func(SyscallDesc *desc, ThreadContext *tc,
300 int tgt_fd, VPtr<> buf_ptr, unsigned count);
301#endif
302
303// Target recvmsg() handler.
304SyscallReturn recvmsgFunc(SyscallDesc *desc, ThreadContext *tc,
305 int tgt_fd, VPtr<> msgPtr, int flags);
306
307// Target sendmsg() handler.
308SyscallReturn sendmsgFunc(SyscallDesc *desc, ThreadContext *tc,
309 int tgt_fd, VPtr<> msgPtr, int flags);
310
311// Target getuid() handler.
312SyscallReturn getuidFunc(SyscallDesc *desc, ThreadContext *tc);
313
315SyscallReturn getgidFunc(SyscallDesc *desc, ThreadContext *tc);
316
318SyscallReturn getppidFunc(SyscallDesc *desc, ThreadContext *tc);
319
321SyscallReturn geteuidFunc(SyscallDesc *desc, ThreadContext *tc);
322
324SyscallReturn getegidFunc(SyscallDesc *desc, ThreadContext *tc);
325
327SyscallReturn accessFunc(SyscallDesc *desc, ThreadContext *tc,
328 VPtr<> pathname, mode_t mode);
329SyscallReturn accessImpl(SyscallDesc *desc, ThreadContext *tc,
330 std::string path, mode_t mode);
331
332// Target getsockopt() handler.
333SyscallReturn getsockoptFunc(SyscallDesc *desc, ThreadContext *tc,
334 int tgt_fd, int level, int optname,
335 VPtr<> valPtr, VPtr<> lenPtr);
336
337// Target setsockopt() handler.
338SyscallReturn setsockoptFunc(SyscallDesc *desc, ThreadContext *tc,
339 int tgt_fd, int level, int optname,
340 VPtr<> valPtr, socklen_t len);
341
342SyscallReturn getcpuFunc(SyscallDesc *desc, ThreadContext *tc,
343 VPtr<uint32_t> cpu, VPtr<uint32_t> node,
344 VPtr<uint32_t> tcache);
345
346// Target getsockname() handler.
347SyscallReturn getsocknameFunc(SyscallDesc *desc, ThreadContext *tc,
348 int tgt_fd, VPtr<> addrPtr, VPtr<> lenPtr);
349
350template <class OS>
351SyscallReturn
352atSyscallPath(ThreadContext *tc, int dirfd, std::string &path)
353{
354 // If pathname is absolute, then dirfd is ignored.
355 if (dirfd != OS::TGT_AT_FDCWD && !startswith(path, "/")) {
356 auto process = tc->getProcessPtr();
357
358 std::shared_ptr<FDEntry> fdep = ((*process->fds)[dirfd]);
359 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
360 if (!ffdp)
361 return -EBADF;
362
363 if (path.empty())
364 path = ffdp->getFileName();
365 else
366 path = ffdp->getFileName() + "/" + path;
367 }
368
369 return 0;
370}
371
375template <class OS>
376SyscallReturn
377futexFunc(SyscallDesc *desc, ThreadContext *tc,
378 VPtr<> uaddr, int op, int val, int timeout, VPtr<> uaddr2, int val3)
379{
380 auto process = tc->getProcessPtr();
381
382 /*
383 * Unsupported option that does not affect the correctness of the
384 * application. This is a performance optimization utilized by Linux.
385 */
386 op &= ~OS::TGT_FUTEX_PRIVATE_FLAG;
387 op &= ~OS::TGT_FUTEX_CLOCK_REALTIME_FLAG;
388
389 FutexMap &futex_map = tc->getSystemPtr()->futexMap;
390
391 if (OS::TGT_FUTEX_WAIT == op || OS::TGT_FUTEX_WAIT_BITSET == op) {
392 // Ensure futex system call accessed atomically.
393 BufferArg buf(uaddr, sizeof(int));
394 buf.copyIn(SETranslatingPortProxy(tc));
395 int mem_val = *(int*)buf.bufferPtr();
396
397 /*
398 * The value in memory at uaddr is not equal with the expected val
399 * (a different thread must have changed it before the system call was
400 * invoked). In this case, we need to throw an error.
401 */
402 if (val != mem_val)
403 return -OS::TGT_EWOULDBLOCK;
404
405 if (OS::TGT_FUTEX_WAIT == op) {
406 futex_map.suspend(uaddr, process->tgid(), tc);
407 } else {
408 futex_map.suspend_bitset(uaddr, process->tgid(), tc, val3);
409 }
410
411 return 0;
412 } else if (OS::TGT_FUTEX_WAKE == op) {
413 return futex_map.wakeup(uaddr, process->tgid(), val);
414 } else if (OS::TGT_FUTEX_WAKE_BITSET == op) {
415 return futex_map.wakeup_bitset(uaddr, process->tgid(), val3);
416 } else if (OS::TGT_FUTEX_REQUEUE == op ||
417 OS::TGT_FUTEX_CMP_REQUEUE == op) {
418
419 // Ensure futex system call accessed atomically.
420 BufferArg buf(uaddr, sizeof(int));
421 buf.copyIn(SETranslatingPortProxy(tc));
422 int mem_val = *(int*)buf.bufferPtr();
423 /*
424 * For CMP_REQUEUE, the whole operation is only started only if
425 * val3 is still the value of the futex pointed to by uaddr.
426 */
427 if (OS::TGT_FUTEX_CMP_REQUEUE && val3 != mem_val)
428 return -OS::TGT_EWOULDBLOCK;
429 return futex_map.requeue(uaddr, process->tgid(), val, timeout, uaddr2);
430 } else if (OS::TGT_FUTEX_WAKE_OP == op) {
431 /*
432 * The FUTEX_WAKE_OP operation is equivalent to executing the
433 * following code atomically and totally ordered with respect to
434 * other futex operations on any of the two supplied futex words:
435 *
436 * int oldval = *(int *) addr2;
437 * *(int *) addr2 = oldval op oparg;
438 * futex(addr1, FUTEX_WAKE, val, 0, 0, 0);
439 * if (oldval cmp cmparg)
440 * futex(addr2, FUTEX_WAKE, val2, 0, 0, 0);
441 *
442 * (op, oparg, cmp, cmparg are encoded in val3)
443 *
444 * +---+---+-----------+-----------+
445 * |op |cmp| oparg | cmparg |
446 * +---+---+-----------+-----------+
447 * 4 4 12 12 <== # of bits
448 *
449 * reference: http://man7.org/linux/man-pages/man2/futex.2.html
450 *
451 */
452 // get value from simulated-space
453 BufferArg buf(uaddr2, sizeof(int));
454 buf.copyIn(SETranslatingPortProxy(tc));
455 int oldval = *(int*)buf.bufferPtr();
456 int newval = oldval;
457 // extract op, oparg, cmp, cmparg from val3
458 int wake_cmparg = val3 & 0xfff;
459 int wake_oparg = (val3 & 0xfff000) >> 12;
460 int wake_cmp = (val3 & 0xf000000) >> 24;
461 int wake_op = (val3 & 0xf0000000) >> 28;
462 if ((wake_op & OS::TGT_FUTEX_OP_ARG_SHIFT) >> 3 == 1)
463 wake_oparg = (1 << wake_oparg);
464 wake_op &= ~OS::TGT_FUTEX_OP_ARG_SHIFT;
465 // perform operation on the value of the second futex
466 if (wake_op == OS::TGT_FUTEX_OP_SET)
467 newval = wake_oparg;
468 else if (wake_op == OS::TGT_FUTEX_OP_ADD)
469 newval += wake_oparg;
470 else if (wake_op == OS::TGT_FUTEX_OP_OR)
471 newval |= wake_oparg;
472 else if (wake_op == OS::TGT_FUTEX_OP_ANDN)
473 newval &= ~wake_oparg;
474 else if (wake_op == OS::TGT_FUTEX_OP_XOR)
475 newval ^= wake_oparg;
476 // copy updated value back to simulated-space
477 *(int*)buf.bufferPtr() = newval;
478 buf.copyOut(SETranslatingPortProxy(tc));
479 // perform the first wake-up
480 int woken1 = futex_map.wakeup(uaddr, process->tgid(), val);
481 int woken2 = 0;
482 // calculate the condition of the second wake-up
483 bool is_wake2 = false;
484 if (wake_cmp == OS::TGT_FUTEX_OP_CMP_EQ)
485 is_wake2 = oldval == wake_cmparg;
486 else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_NE)
487 is_wake2 = oldval != wake_cmparg;
488 else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LT)
489 is_wake2 = oldval < wake_cmparg;
490 else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_LE)
491 is_wake2 = oldval <= wake_cmparg;
492 else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GT)
493 is_wake2 = oldval > wake_cmparg;
494 else if (wake_cmp == OS::TGT_FUTEX_OP_CMP_GE)
495 is_wake2 = oldval >= wake_cmparg;
496 // perform the second wake-up
497 if (is_wake2)
498 woken2 = futex_map.wakeup(uaddr2, process->tgid(), timeout);
499
500 return woken1 + woken2;
501 }
502 warn("futex: op %d not implemented; ignoring.", op);
503 return -ENOSYS;
504}
505
508SyscallReturn pipePseudoFunc(SyscallDesc *desc, ThreadContext *tc);
509
510
514const unsigned seconds_since_epoch = 1000 * 1000 * 1000;
515
518template <class T1, class T2>
519void
520getElapsedTimeMicro(T1 &sec, T2 &usec)
521{
522 static const int OneMillion = 1000 * 1000;
523
524 uint64_t elapsed_usecs = curTick() / sim_clock::as_int::us;
525 sec = elapsed_usecs / OneMillion;
526 usec = elapsed_usecs % OneMillion;
527}
528
531template <class T1, class T2>
532void
533getElapsedTimeNano(T1 &sec, T2 &nsec)
534{
535 static const int OneBillion = 1000 * 1000 * 1000;
536
537 uint64_t elapsed_nsecs = curTick() / sim_clock::as_int::ns;
538 sec = elapsed_nsecs / OneBillion;
539 nsec = elapsed_nsecs % OneBillion;
540}
541
543//
544// The following emulation functions are generic, but need to be
545// templated to account for differences in types, constants, etc.
546//
548
549 typedef struct statfs hst_statfs;
550#if NO_STAT64
551 typedef struct stat hst_stat;
552 typedef struct stat hst_stat64;
553#else
554 typedef struct stat hst_stat;
555 typedef struct stat64 hst_stat64;
556#endif
557
561
562template <typename OS, typename TgtStatPtr, typename HostStatPtr>
563void
564copyOutStatBuf(TgtStatPtr tgt, HostStatPtr host, bool fakeTTY=false)
565{
566 constexpr ByteOrder bo = OS::byteOrder;
567
568 if (fakeTTY)
569 tgt->st_dev = 0xA;
570 else
571 tgt->st_dev = host->st_dev;
572 tgt->st_dev = htog(tgt->st_dev, bo);
573 tgt->st_ino = host->st_ino;
574 tgt->st_ino = htog(tgt->st_ino, bo);
575 tgt->st_mode = host->st_mode;
576 if (fakeTTY) {
577 // Claim to be a character device
578 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
579 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
580 }
581 tgt->st_mode = htog(tgt->st_mode, bo);
582 tgt->st_nlink = host->st_nlink;
583 tgt->st_nlink = htog(tgt->st_nlink, bo);
584 tgt->st_uid = host->st_uid;
585 tgt->st_uid = htog(tgt->st_uid, bo);
586 tgt->st_gid = host->st_gid;
587 tgt->st_gid = htog(tgt->st_gid, bo);
588 if (fakeTTY)
589 tgt->st_rdev = 0x880d;
590 else
591 tgt->st_rdev = host->st_rdev;
592 tgt->st_rdev = htog(tgt->st_rdev, bo);
593 tgt->st_size = host->st_size;
594 tgt->st_size = htog(tgt->st_size, bo);
595 tgt->st_atimeX = host->st_atime;
596 tgt->st_atimeX = htog(tgt->st_atimeX, bo);
597 tgt->st_mtimeX = host->st_mtime;
598 tgt->st_mtimeX = htog(tgt->st_mtimeX, bo);
599 tgt->st_ctimeX = host->st_ctime;
600 tgt->st_ctimeX = htog(tgt->st_ctimeX, bo);
601 // Force the block size to be 8KB. This helps to ensure buffered io works
602 // consistently across different hosts.
603 tgt->st_blksize = 0x2000;
604 tgt->st_blksize = htog(tgt->st_blksize, bo);
605 tgt->st_blocks = host->st_blocks;
606 tgt->st_blocks = htog(tgt->st_blocks, bo);
607}
608
609// Same for stat64
610
611template <typename OS, typename TgtStatPtr, typename HostStatPtr>
612void
613copyOutStat64Buf(TgtStatPtr tgt, HostStatPtr host,
614 bool fakeTTY=false)
615{
616 copyOutStatBuf<OS>(tgt, host, fakeTTY);
617#if defined(STAT_HAVE_NSEC)
618 constexpr ByteOrder bo = OS::byteOrder;
619
620 tgt->st_atime_nsec = host->st_atime_nsec;
621 tgt->st_atime_nsec = htog(tgt->st_atime_nsec, bo);
622 tgt->st_mtime_nsec = host->st_mtime_nsec;
623 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec, bo);
624 tgt->st_ctime_nsec = host->st_ctime_nsec;
625 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec, bo);
626#else
627 tgt->st_atime_nsec = 0;
628 tgt->st_mtime_nsec = 0;
629 tgt->st_ctime_nsec = 0;
630#endif
631}
632
633template <class OS, typename TgtStatPtr, typename HostStatPtr>
634void
635copyOutStatfsBuf(TgtStatPtr tgt, HostStatPtr host)
636{
637 constexpr ByteOrder bo = OS::byteOrder;
638
639 tgt->f_type = htog(host->f_type, bo);
640#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
641 tgt->f_bsize = htog(host->f_iosize, bo);
642#else
643 tgt->f_bsize = htog(host->f_bsize, bo);
644#endif
645 tgt->f_blocks = htog(host->f_blocks, bo);
646 tgt->f_bfree = htog(host->f_bfree, bo);
647 tgt->f_bavail = htog(host->f_bavail, bo);
648 tgt->f_files = htog(host->f_files, bo);
649 tgt->f_ffree = htog(host->f_ffree, bo);
650 memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid));
651#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
652 tgt->f_namelen = htog(host->f_namemax, bo);
653 tgt->f_frsize = htog(host->f_bsize, bo);
654#elif defined(__APPLE__)
655 tgt->f_namelen = 0;
656 tgt->f_frsize = 0;
657#else
658 tgt->f_namelen = htog(host->f_namelen, bo);
659 tgt->f_frsize = htog(host->f_frsize, bo);
660#endif
661#if defined(__linux__)
662 memcpy(&tgt->f_spare, &host->f_spare,
663 std::min(sizeof(host->f_spare), sizeof(tgt->f_spare)));
664#else
665 /*
666 * The fields are different sizes per OS. Don't bother with
667 * f_spare or f_reserved on non-Linux for now.
668 */
669 memset(&tgt->f_spare, 0, sizeof(tgt->f_spare));
670#endif
671}
672
673template <typename OS, typename TgtStatPtr, typename HostStatPtr>
674void
675copyOutStatxBuf(TgtStatPtr tgt, HostStatPtr host, bool fakeTTY = false)
676{
677 constexpr ByteOrder bo = OS::byteOrder;
678
679 if (fakeTTY) {
680 tgt->stx_dev_major = 0x00;
681 tgt->stx_dev_minor = 0x0A;
682 } else {
683 tgt->stx_dev_major = host->st_dev >> 8;
684 tgt->stx_dev_minor = host->st_dev & 0xFF;
685 }
686 tgt->stx_dev_major = htog(tgt->stx_dev_major, bo);
687 tgt->stx_dev_minor = htog(tgt->stx_dev_minor, bo);
688 tgt->stx_ino = host->st_ino;
689 tgt->stx_ino = htog(tgt->stx_ino, bo);
690 tgt->stx_mode = host->st_mode;
691 if (fakeTTY) {
692 // Claim to be character device.
693 tgt->stx_mode &= ~S_IFMT;
694 tgt->stx_mode |= S_IFCHR;
695 }
696 tgt->stx_mode = htog(tgt->stx_mode, bo);
697 tgt->stx_nlink = host->st_nlink;
698 tgt->stx_nlink = htog(tgt->stx_nlink, bo);
699 tgt->stx_uid = host->st_uid;
700 tgt->stx_uid = htog(tgt->stx_uid, bo);
701 tgt->stx_gid = host->st_gid;
702 tgt->stx_gid = htog(tgt->stx_gid, bo);
703 if (fakeTTY) {
704 tgt->stx_rdev_major = 0x880d >> 8;
705 tgt->stx_rdev_minor = 0x880d & 0xFF;
706 } else {
707 tgt->stx_rdev_major = host->st_rdev >> 8;
708 tgt->stx_rdev_minor = host->st_rdev & 0xFF;
709 }
710 tgt->stx_rdev_major = htog(tgt->stx_rdev_major, bo);
711 tgt->stx_rdev_minor = htog(tgt->stx_rdev_minor, bo);
712 tgt->stx_size = host->st_size;
713 tgt->stx_size = htog(tgt->stx_size, bo);
714 tgt->stx_atimeX = host->st_atime;
715 tgt->stx_atimeX = htog(tgt->stx_atimeX, bo);
716 tgt->stx_ctimeX = host->st_ctime;
717 tgt->stx_ctimeX = htog(tgt->stx_ctimeX, bo);
718 tgt->stx_mtimeX = host->st_mtime;
719 tgt->stx_mtimeX = htog(tgt->stx_mtimeX, bo);
720 // Force the block size to be 8KB. This helps to ensure buffered io works
721 // consistently across different hosts.
722 tgt->stx_blksize = 0x2000;
723 tgt->stx_blksize = htog(tgt->stx_blksize, bo);
724 tgt->stx_blocks = host->st_blocks;
725 tgt->stx_blocks = htog(tgt->stx_blocks, bo);
726 tgt->stx_mask = 0x000007ffU; // STATX_BASIC_STATS on Linux.
727 tgt->stx_mask = htog(tgt->stx_mask, bo);
728 tgt->stx_attributes = 0;
729 tgt->stx_attributes_mask = 0;
730 tgt->stx_attributes_mask = htog(tgt->stx_attributes_mask, bo);
731}
732
737template <class OS>
738SyscallReturn
739ioctlFunc(SyscallDesc *desc, ThreadContext *tc,
740 int tgt_fd, unsigned req, VPtr<> addr)
741{
742 auto p = tc->getProcessPtr();
743
744 DPRINTF_SYSCALL(Verbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req);
745
746 if (OS::isTtyReq(req))
747 return -ENOTTY;
748
749 auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>((*p->fds)[tgt_fd]);
750 if (dfdp) {
751 EmulatedDriver *emul_driver = dfdp->getDriver();
752 if (emul_driver)
753 return emul_driver->ioctl(tc, req, addr);
754 }
755
756 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
757 if (sfdp) {
758 int status;
759
760 switch (req) {
761 case SIOCGIFCONF: {
762 BufferArg conf_arg(addr, sizeof(ifconf));
763 conf_arg.copyIn(SETranslatingPortProxy(tc));
764
765 ifconf *conf = (ifconf*)conf_arg.bufferPtr();
766 Addr ifc_buf_addr = (Addr)conf->ifc_buf;
767 BufferArg ifc_buf_arg(ifc_buf_addr, conf->ifc_len);
768 ifc_buf_arg.copyIn(SETranslatingPortProxy(tc));
769
770 conf->ifc_buf = (char*)ifc_buf_arg.bufferPtr();
771
772 status = ioctl(sfdp->getSimFD(), req, conf_arg.bufferPtr());
773 if (status != -1) {
774 conf->ifc_buf = (char*)ifc_buf_addr;
775 ifc_buf_arg.copyOut(SETranslatingPortProxy(tc));
776 conf_arg.copyOut(SETranslatingPortProxy(tc));
777 }
778
779 return status;
780 }
781 case SIOCGIFFLAGS:
782#if defined(__linux__)
783 case SIOCGIFINDEX:
784#endif
785 case SIOCGIFNETMASK:
786 case SIOCGIFADDR:
787#if defined(__linux__)
788 case SIOCGIFHWADDR:
789#endif
790 case SIOCGIFMTU: {
791 BufferArg req_arg(addr, sizeof(ifreq));
792 req_arg.copyIn(SETranslatingPortProxy(tc));
793
794 status = ioctl(sfdp->getSimFD(), req, req_arg.bufferPtr());
795 if (status != -1)
796 req_arg.copyOut(SETranslatingPortProxy(tc));
797 return status;
798 }
799 }
800 }
801
806 warn("Unsupported ioctl call (return ENOTTY): ioctl(%d, 0x%x, ...) @ \n",
807 tgt_fd, req, tc->pcState());
808 return -ENOTTY;
809}
810
812template <class OS>
813SyscallReturn
814openatFunc(SyscallDesc *desc, ThreadContext *tc,
815 int tgt_dirfd, VPtr<> pathname, int tgt_flags, int mode)
816{
817 auto p = tc->getProcessPtr();
818
823 std::string path;
824 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
825 return -EFAULT;
826
827#ifdef __CYGWIN32__
828 int host_flags = O_BINARY;
829#else
830 int host_flags = 0;
831#endif
836 for (const auto &p: OS::openFlagTable) {
837 if (tgt_flags & p.first) {
838 tgt_flags &= ~p.first;
839 host_flags |= p.second;
840 }
841 }
842 warn_if(tgt_flags, "%s: cannot decode flags %#x", desc->name(), tgt_flags);
843
844#ifdef __CYGWIN32__
845 host_flags |= O_BINARY;
846#endif
847
860 std::string redir_path = path;
861 std::string abs_path = path;
862 if (tgt_dirfd == OS::TGT_AT_FDCWD) {
863 abs_path = p->absolutePath(path, true);
864 redir_path = p->checkPathRedirect(path);
865 } else if (!startswith(path, "/")) {
866 std::shared_ptr<FDEntry> fdep = ((*p->fds)[tgt_dirfd]);
867 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
868 if (!ffdp)
869 return -EBADF;
870 abs_path = ffdp->getFileName() + path;
871 redir_path = p->checkPathRedirect(abs_path);
872 }
873
880 if (startswith(abs_path, "/dev/")) {
881 std::string filename = abs_path.substr(strlen("/dev/"));
882 EmulatedDriver *drv = p->findDriver(filename);
883 if (drv) {
884 DPRINTF_SYSCALL(Verbose, "%s: passing call to "
885 "driver open with path[%s]\n",
886 desc->name(), abs_path.c_str());
887 return drv->open(tc, mode, host_flags);
888 }
893 }
894
919 int sim_fd = -1;
920 std::string used_path;
921 std::vector<std::string> special_paths =
922 { "/proc/meminfo", "/system/", "/platform/", "/etc/passwd",
923 "/proc/self/maps", "/dev/urandom",
924 "/sys/devices/system/cpu/online" };
925 for (auto entry : special_paths) {
926 if (startswith(path, entry)) {
927 sim_fd = OS::openSpecialFile(abs_path, p, tc);
928 used_path = abs_path;
929 }
930 }
931 if (sim_fd == -1) {
932 sim_fd = open(redir_path.c_str(), host_flags, mode);
933 used_path = redir_path;
934 }
935 if (sim_fd == -1) {
936 int local = -errno;
937 DPRINTF_SYSCALL(Verbose, "%s: failed -> path:%s "
938 "(inferred from:%s)\n", desc->name(),
939 used_path.c_str(), path.c_str());
940 return local;
941 }
942
951 auto ffdp = std::make_shared<FileFDEntry>(sim_fd, host_flags, path, 0);
952 // Record the file mode for checkpoint restoring
953 ffdp->setFileMode(mode);
954 int tgt_fd = p->fds->allocFD(ffdp);
955 DPRINTF_SYSCALL(Verbose, "%s: sim_fd[%d], target_fd[%d] -> path:%s\n"
956 "(inferred from:%s)\n", desc->name(),
957 sim_fd, tgt_fd, used_path.c_str(), path.c_str());
958 return tgt_fd;
959}
960
962template <class OS>
963SyscallReturn
964openFunc(SyscallDesc *desc, ThreadContext *tc,
965 VPtr<> pathname, int tgt_flags, int mode)
966{
967 return openatFunc<OS>(
968 desc, tc, OS::TGT_AT_FDCWD, pathname, tgt_flags, mode);
969}
970
972template <class OS>
973SyscallReturn
974getcwdFunc(SyscallDesc *desc, ThreadContext *tc,
975 VPtr<> buf_ptr, typename OS::size_t size)
976{
977 int result = 0;
978 auto p = tc->getProcessPtr();
979 BufferArg buf(buf_ptr, size);
980
981 // Is current working directory defined?
982 std::string cwd = p->tgtCwd;
983 if (!cwd.empty()) {
984 if (cwd.length() >= size) {
985 // Buffer too small
986 return -ERANGE;
987 }
988 strncpy((char *)buf.bufferPtr(), cwd.c_str(), size);
989 result = cwd.length();
990 } else {
991 if (getcwd((char *)buf.bufferPtr(), size)) {
992 result = strlen((char *)buf.bufferPtr());
993 } else {
994 result = -1;
995 }
996 }
997
998 buf.copyOut(SETranslatingPortProxy(tc));
999
1000 return (result == -1) ? -errno : result;
1001}
1002
1004template <class OS>
1005SyscallReturn
1006lseekFunc(SyscallDesc *desc, ThreadContext *tc,
1007 int tgt_fd, typename OS::off_t offs, int whence)
1008{
1009 auto p = tc->getProcessPtr();
1010
1011 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
1012 if (!ffdp)
1013 return -EBADF;
1014 int sim_fd = ffdp->getSimFD();
1015
1016 off_t result = lseek(sim_fd, offs, whence);
1017
1018 return (result == (off_t)-1) ? -errno : result;
1019}
1020
1022template <class OS>
1023SyscallReturn
1024unlinkatFunc(SyscallDesc *desc, ThreadContext *tc,
1025 int dirfd, VPtr<> pathname, int flags)
1026{
1027 std::string path;
1028 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1029 return -EFAULT;
1030
1031 // Modifying path from the directory descriptor
1032 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1033 return res;
1034 }
1035
1036 if (flags & OS::TGT_AT_REMOVEDIR) {
1037 return rmdirImpl(desc, tc, path);
1038 } else {
1039 return unlinkImpl(desc, tc, path);
1040 }
1041}
1042
1044template <class OS>
1045SyscallReturn
1046faccessatFunc(SyscallDesc *desc, ThreadContext *tc,
1047 int dirfd, VPtr<> pathname, int mode)
1048{
1049 std::string path;
1050 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1051 return -EFAULT;
1052
1053 // Modifying path from the directory descriptor
1054 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1055 return res;
1056 }
1057
1058 return accessImpl(desc, tc, path, mode);
1059}
1060
1062template <class OS>
1063SyscallReturn
1064readlinkatFunc(SyscallDesc *desc, ThreadContext *tc,
1065 int dirfd, VPtr<> pathname, VPtr<> buf_ptr,
1066 typename OS::size_t bufsiz)
1067{
1068 std::string path;
1069 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1070 return -EFAULT;
1071
1072 // Modifying path from the directory descriptor
1073 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1074 return res;
1075 }
1076
1077 auto p = tc->getProcessPtr();
1078
1079 // Adjust path for cwd and redirection
1080 path = p->checkPathRedirect(path);
1081
1082 BufferArg buf(buf_ptr, bufsiz);
1083
1084 int result = -1;
1085 if (path != "/proc/self/exe") {
1086 result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz);
1087 } else {
1088 // Emulate readlink() called on '/proc/self/exe' should return the
1089 // absolute path of the binary running in the simulated system (the
1090 // Process' executable). It is possible that using this path in
1091 // the simulated system will result in unexpected behavior if:
1092 // 1) One binary runs another (e.g., -c time -o "my_binary"), and
1093 // called binary calls readlink().
1094 // 2) The host's full path to the running benchmark changes from one
1095 // simulation to another. This can result in different simulated
1096 // performance since the simulated system will process the binary
1097 // path differently, even if the binary itself does not change.
1098
1099 // Get the absolute canonical path to the running application
1100 char real_path[PATH_MAX];
1101 char *check_real_path = realpath(p->progName(), real_path);
1102 if (!check_real_path) {
1103 fatal("readlink('/proc/self/exe') unable to resolve path to "
1104 "executable: %s", p->progName());
1105 }
1106 strncpy((char*)buf.bufferPtr(), real_path, bufsiz);
1107 typename OS::size_t real_path_len = strlen(real_path);
1108 if (real_path_len > bufsiz) {
1109 // readlink will truncate the contents of the
1110 // path to ensure it is no more than bufsiz
1111 result = bufsiz;
1112 } else {
1113 result = real_path_len;
1114 }
1115
1116 // Issue a warning about potential unexpected results
1117 warn_once("readlink() called on '/proc/self/exe' may yield unexpected "
1118 "results in various settings.\n Returning '%s'\n",
1119 (char*)buf.bufferPtr());
1120 }
1121
1122 buf.copyOut(SETranslatingPortProxy(tc));
1123
1124 return (result == -1) ? -errno : result;
1125}
1126
1128template <class OS>
1129SyscallReturn
1130readlinkFunc(SyscallDesc *desc, ThreadContext *tc,
1131 VPtr<> pathname, VPtr<> buf_ptr,
1132 typename OS::size_t bufsiz)
1133{
1134 return readlinkatFunc<OS>(desc, tc, OS::TGT_AT_FDCWD,
1135 pathname, buf_ptr, bufsiz);
1136}
1137
1139template <class OS>
1140SyscallReturn
1141renameatFunc(SyscallDesc *desc, ThreadContext *tc,
1142 int olddirfd, VPtr<> oldpath, int newdirfd, VPtr<> newpath)
1143{
1144 SETranslatingPortProxy proxy(tc);
1145 std::string old_name;
1146 if (!proxy.tryReadString(old_name, oldpath))
1147 return -EFAULT;
1148
1149 std::string new_name;
1150 if (!proxy.tryReadString(new_name, newpath))
1151 return -EFAULT;
1152
1153 // Modifying old_name from the directory descriptor
1154 if (auto res = atSyscallPath<OS>(tc, olddirfd, old_name); !res.successful()) {
1155 return res;
1156 }
1157
1158 // Modifying new_name from the directory descriptor
1159 if (auto res = atSyscallPath<OS>(tc, newdirfd, new_name); !res.successful()) {
1160 return res;
1161 }
1162
1163 return renameImpl(desc, tc, old_name, new_name);
1164}
1165
1167template <class OS>
1168SyscallReturn
1169fchownatFunc(SyscallDesc *desc, ThreadContext *tc,
1170 int dirfd, VPtr<> pathname, uint32_t owner, uint32_t group,
1171 int flags)
1172{
1173 std::string path;
1174 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1175 return -EFAULT;
1176
1177 // Modifying path from the directory descriptor
1178 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1179 return res;
1180 }
1181
1182 return chownImpl(desc, tc, path, owner, group);
1183}
1184
1186template <class OS>
1187SyscallReturn
1188mkdiratFunc(SyscallDesc *desc, ThreadContext *tc,
1189 int dirfd, VPtr<> pathname, mode_t mode)
1190{
1191 std::string path;
1192 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1193 return -EFAULT;
1194
1195 // Modifying path from the directory descriptor
1196 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1197 return res;
1198 }
1199
1200 return mkdirImpl(desc, tc, path, mode);
1201}
1202
1204template <class OS>
1205SyscallReturn
1206mknodatFunc(SyscallDesc *desc, ThreadContext *tc,
1207 int dirfd, VPtr<> pathname, mode_t mode, dev_t dev)
1208{
1209 std::string path;
1210 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1211 return -EFAULT;
1212
1213 // Modifying path from the directory descriptor
1214 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1215 return res;
1216 }
1217
1218 return mknodImpl(desc, tc, path, mode, dev);
1219}
1220
1222template <class OS>
1223SyscallReturn
1224sysinfoFunc(SyscallDesc *desc, ThreadContext *tc,
1225 VPtr<typename OS::tgt_sysinfo> sysinfo)
1226{
1227 auto process = tc->getProcessPtr();
1228
1229 sysinfo->uptime = seconds_since_epoch;
1230 sysinfo->totalram = process->system->memSize();
1231 sysinfo->mem_unit = 1;
1232
1233 return 0;
1234}
1235
1237template <class OS>
1238SyscallReturn
1239fchmodatFunc(SyscallDesc *desc, ThreadContext *tc,
1240 int dirfd, VPtr<> pathname, mode_t mode)
1241{
1242 std::string path;
1243 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1244 return -EFAULT;
1245
1246 // Modifying path from the directory descriptor
1247 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1248 return res;
1249 }
1250
1251 mode_t hostMode = 0;
1252
1253 // XXX translate mode flags via OS::something???
1254 hostMode = mode;
1255
1256 auto process = tc->getProcessPtr();
1257 // Adjust path for cwd and redirection
1258 path = process->checkPathRedirect(path);
1259
1260 // do the chmod
1261 int result = chmod(path.c_str(), hostMode);
1262 if (result < 0)
1263 return -errno;
1264
1265 return 0;
1266}
1267
1269template <class OS>
1270SyscallReturn
1271chmodFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, mode_t mode)
1272{
1273 return fchmodatFunc<OS>(desc, tc, OS::TGT_AT_FDCWD, pathname, mode);
1274}
1275
1276template <class OS>
1277SyscallReturn
1278pollFunc(SyscallDesc *desc, ThreadContext *tc,
1279 VPtr<> fdsPtr, int nfds, int tmout)
1280{
1281 auto p = tc->getProcessPtr();
1282
1283 BufferArg fdsBuf(fdsPtr, sizeof(struct pollfd) * nfds);
1284 fdsBuf.copyIn(SETranslatingPortProxy(tc));
1285
1292 int temp_tgt_fds[nfds];
1293 for (int index = 0; index < nfds; index++) {
1294 temp_tgt_fds[index] = ((struct pollfd *)fdsBuf.bufferPtr())[index].fd;
1295 auto tgt_fd = temp_tgt_fds[index];
1296 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
1297 if (!hbfdp)
1298 return -EBADF;
1299 auto host_fd = hbfdp->getSimFD();
1300 ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = host_fd;
1301 }
1302
1309 int status;
1310 if (tmout < 0) {
1311 status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0);
1312 if (status == 0) {
1318 System *sysh = tc->getSystemPtr();
1319 std::list<BasicSignal>::iterator it;
1320 for (it=sysh->signalList.begin(); it!=sysh->signalList.end(); it++)
1321 if (it->receiver == p)
1322 return -EINTR;
1323 return SyscallReturn::retry();
1324 }
1325 } else
1326 status = poll((struct pollfd *)fdsBuf.bufferPtr(), nfds, 0);
1327
1328 if (status == -1)
1329 return -errno;
1330
1335 for (int index = 0; index < nfds; index++) {
1336 auto tgt_fd = temp_tgt_fds[index];
1337 ((struct pollfd *)fdsBuf.bufferPtr())[index].fd = tgt_fd;
1338 }
1339
1344 fdsBuf.copyOut(SETranslatingPortProxy(tc));
1345
1346 return status;
1347}
1348
1350template <class OS>
1351SyscallReturn
1352fchmodFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, uint32_t mode)
1353{
1354 auto p = tc->getProcessPtr();
1355
1356 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
1357 if (!ffdp)
1358 return -EBADF;
1359 int sim_fd = ffdp->getSimFD();
1360
1361 mode_t hostMode = mode;
1362
1363 int result = fchmod(sim_fd, hostMode);
1364
1365 return (result < 0) ? -errno : 0;
1366}
1367
1369template <class OS>
1370SyscallReturn
1371mremapFunc(SyscallDesc *desc, ThreadContext *tc,
1372 VPtr<> start, typename OS::size_t old_length,
1373 typename OS::size_t new_length, int flags,
1374 guest_abi::VarArgs<uint64_t> varargs)
1375{
1376 auto p = tc->getProcessPtr();
1377 Addr page_bytes = p->pTable->pageSize();
1378 uint64_t provided_address = 0;
1379 bool use_provided_address = flags & OS::TGT_MREMAP_FIXED;
1380
1381 if (use_provided_address)
1382 provided_address = varargs.get<uint64_t>();
1383
1384 if ((start % page_bytes != 0) ||
1385 (provided_address % page_bytes != 0)) {
1386 warn("mremap failing: arguments not page aligned");
1387 return -EINVAL;
1388 }
1389
1390 new_length = roundUp(new_length, page_bytes);
1391
1392 if (new_length > old_length) {
1393 Addr mmap_end = p->memState->getMmapEnd();
1394
1395 if ((start + old_length) == mmap_end &&
1396 (!use_provided_address || provided_address == start)) {
1397 // This case cannot occur when growing downward, as
1398 // start is greater than or equal to mmap_end.
1399 uint64_t diff = new_length - old_length;
1400 p->memState->mapRegion(mmap_end, diff, "remapped");
1401 p->memState->setMmapEnd(mmap_end + diff);
1402 return (Addr)start;
1403 } else {
1404 if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) {
1405 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
1406 return -ENOMEM;
1407 } else {
1408 uint64_t new_start = provided_address;
1409 if (!use_provided_address) {
1410 new_start = p->mmapGrowsDown() ?
1411 mmap_end - new_length : mmap_end;
1412 mmap_end = p->mmapGrowsDown() ?
1413 new_start : mmap_end + new_length;
1414 p->memState->setMmapEnd(mmap_end);
1415 }
1416
1417 warn("mremapping to new vaddr %08p-%08p, adding %d\n",
1418 new_start, new_start + new_length,
1419 new_length - old_length);
1420
1421 // add on the remaining unallocated pages
1422 p->allocateMem(new_start + old_length,
1423 new_length - old_length,
1424 use_provided_address /* clobber */);
1425
1426 if (use_provided_address &&
1427 ((new_start + new_length > p->memState->getMmapEnd() &&
1428 !p->mmapGrowsDown()) ||
1429 (new_start < p->memState->getMmapEnd() &&
1430 p->mmapGrowsDown()))) {
1431 // something fishy going on here, at least notify the user
1432 // @todo: increase mmap_end?
1433 warn("mmap region limit exceeded with MREMAP_FIXED\n");
1434 }
1435
1436 warn("returning %08p as start\n", new_start);
1437 p->memState->remapRegion(start, new_start, old_length);
1438 return new_start;
1439 }
1440 }
1441 } else {
1442 // Shrink a region
1443 if (use_provided_address && provided_address != start)
1444 p->memState->remapRegion(start, provided_address, new_length);
1445 if (new_length != old_length)
1446 p->memState->unmapRegion(start + new_length,
1447 old_length - new_length);
1448 return use_provided_address ? provided_address : (Addr)start;
1449 }
1450}
1451
1453template <class OS>
1454SyscallReturn
1455statFunc(SyscallDesc *desc, ThreadContext *tc,
1456 VPtr<> pathname, VPtr<typename OS::tgt_stat> tgt_stat)
1457{
1458 std::string path;
1459 auto process = tc->getProcessPtr();
1460
1461 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1462 return -EFAULT;
1463
1464 // Adjust path for cwd and redirection
1465 path = process->checkPathRedirect(path);
1466
1467 struct stat hostBuf;
1468 int result = stat(path.c_str(), &hostBuf);
1469
1470 if (result < 0)
1471 return -errno;
1472
1473 copyOutStatBuf<OS>(tgt_stat, &hostBuf);
1474
1475 return 0;
1476}
1477
1479template <class OS>
1480SyscallReturn
1481newfstatatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd,
1482 VPtr<> pathname, VPtr<typename OS::tgt_stat64> tgt_stat,
1483 int flags)
1484{
1485 std::string path;
1486
1487 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1488 return -EFAULT;
1489
1490 if (path.empty() && !(flags & OS::TGT_AT_EMPTY_PATH))
1491 return -ENOENT;
1492 flags = flags & ~OS::TGT_AT_EMPTY_PATH;
1493
1494 warn_if(flags != 0, "newfstatat: Flag bits %#x not supported.", flags);
1495
1496 // Modifying path from the directory descriptor
1497 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1498 return res;
1499 }
1500
1501 auto p = tc->getProcessPtr();
1502
1503 // Adjust path for cwd and redirection
1504 path = p->checkPathRedirect(path);
1505
1506 struct stat host_buf;
1507 int result = stat(path.c_str(), &host_buf);
1508
1509 if (result < 0)
1510 return -errno;
1511
1512 copyOutStat64Buf<OS>(tgt_stat, &host_buf);
1513
1514 return 0;
1515}
1516
1518template <class OS>
1519SyscallReturn
1520fstatat64Func(SyscallDesc *desc, ThreadContext *tc,
1521 int dirfd, VPtr<> pathname,
1522 VPtr<typename OS::tgt_stat64> tgt_stat)
1523{
1524 std::string path;
1525 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1526 return -EFAULT;
1527
1528 // Modifying path from the directory descriptor
1529 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1530 return res;
1531 }
1532
1533 auto p = tc->getProcessPtr();
1534
1535 // Adjust path for cwd and redirection
1536 path = p->checkPathRedirect(path);
1537
1538#if NO_STAT64
1539 struct stat hostBuf;
1540 int result = stat(path.c_str(), &hostBuf);
1541#else
1542 struct stat64 hostBuf;
1543 int result = stat64(path.c_str(), &hostBuf);
1544#endif
1545
1546 if (result < 0)
1547 return -errno;
1548
1549 copyOutStat64Buf<OS>(tgt_stat, &hostBuf);
1550
1551 return 0;
1552}
1553
1555template <class OS>
1556SyscallReturn
1557stat64Func(SyscallDesc *desc, ThreadContext *tc,
1558 VPtr<> pathname, VPtr<typename OS::tgt_stat64> tgt_stat)
1559{
1560 return fstatat64Func<OS>(desc, tc, OS::TGT_AT_FDCWD, pathname, tgt_stat);
1561}
1562
1564template <class OS>
1565SyscallReturn
1566statxFunc(SyscallDesc *desc, ThreadContext *tc,
1567 int dirfd, VPtr<> pathname, int flags,
1568 unsigned int mask, VPtr<typename OS::tgt_statx> tgt_statx)
1569{
1570 std::string path;
1571
1572 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1573 return -EFAULT;
1574
1575 if (path.empty() && !(flags & OS::TGT_AT_EMPTY_PATH))
1576 return -ENOENT;
1577 flags = flags & ~OS::TGT_AT_EMPTY_PATH;
1578
1579 warn_if(flags != 0, "statx: Flag bits %#x not supported.", flags);
1580
1581 // Modifying path from the directory descriptor
1582 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
1583 return res;
1584 }
1585
1586 auto p = tc->getProcessPtr();
1587
1588 // Adjust path for cwd and redirection
1589 path = p->checkPathRedirect(path);
1590
1591 struct stat host_buf;
1592 int result = stat(path.c_str(), &host_buf);
1593
1594 if (result < 0)
1595 return -errno;
1596
1597 copyOutStatxBuf<OS>(tgt_statx, &host_buf);
1598
1599 return 0;
1600}
1601
1603template <class OS>
1604SyscallReturn
1605fstat64Func(SyscallDesc *desc, ThreadContext *tc,
1606 int tgt_fd, VPtr<typename OS::tgt_stat64> tgt_stat)
1607{
1608 auto p = tc->getProcessPtr();
1609
1610 auto ffdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
1611 if (!ffdp)
1612 return -EBADF;
1613 int sim_fd = ffdp->getSimFD();
1614
1615#if NO_STAT64
1616 struct stat hostBuf;
1617 int result = fstat(sim_fd, &hostBuf);
1618#else
1619 struct stat64 hostBuf;
1620 int result = fstat64(sim_fd, &hostBuf);
1621#endif
1622
1623 if (result < 0)
1624 return -errno;
1625
1626 copyOutStat64Buf<OS>(tgt_stat, &hostBuf, (sim_fd == 1));
1627
1628 return 0;
1629}
1630
1631
1633template <class OS>
1634SyscallReturn
1635lstatFunc(SyscallDesc *desc, ThreadContext *tc,
1636 VPtr<> pathname, VPtr<typename OS::tgt_stat> tgt_stat)
1637{
1638 std::string path;
1639 auto process = tc->getProcessPtr();
1640
1641 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1642 return -EFAULT;
1643
1644 // Adjust path for cwd and redirection
1645 path = process->checkPathRedirect(path);
1646
1647 struct stat hostBuf;
1648 int result = lstat(path.c_str(), &hostBuf);
1649
1650 if (result < 0)
1651 return -errno;
1652
1653 copyOutStatBuf<OS>(tgt_stat, &hostBuf);
1654
1655 return 0;
1656}
1657
1659template <class OS>
1660SyscallReturn
1661lstat64Func(SyscallDesc *desc, ThreadContext *tc,
1662 VPtr<> pathname, VPtr<typename OS::tgt_stat64> tgt_stat)
1663{
1664 std::string path;
1665 auto process = tc->getProcessPtr();
1666
1667 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1668 return -EFAULT;
1669
1670 // Adjust path for cwd and redirection
1671 path = process->checkPathRedirect(path);
1672
1673#if NO_STAT64
1674 struct stat hostBuf;
1675 int result = lstat(path.c_str(), &hostBuf);
1676#else
1677 struct stat64 hostBuf;
1678 int result = lstat64(path.c_str(), &hostBuf);
1679#endif
1680
1681 if (result < 0)
1682 return -errno;
1683
1684 copyOutStat64Buf<OS>(tgt_stat, &hostBuf);
1685
1686 return 0;
1687}
1688
1690template <class OS>
1691SyscallReturn
1692fstatFunc(SyscallDesc *desc, ThreadContext *tc,
1693 int tgt_fd, VPtr<typename OS::tgt_stat> tgt_stat)
1694{
1695 auto p = tc->getProcessPtr();
1696
1697 DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd);
1698
1699 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
1700 if (!ffdp)
1701 return -EBADF;
1702 int sim_fd = ffdp->getSimFD();
1703
1704 struct stat hostBuf;
1705 int result = fstat(sim_fd, &hostBuf);
1706
1707 if (result < 0)
1708 return -errno;
1709
1710 copyOutStatBuf<OS>(tgt_stat, &hostBuf, (sim_fd == 1));
1711
1712 return 0;
1713}
1714
1716template <class OS>
1717SyscallReturn
1718statfsFunc(SyscallDesc *desc, ThreadContext *tc,
1719 VPtr<> pathname, VPtr<typename OS::tgt_statfs> tgt_stat)
1720{
1721#if defined(__linux__)
1722 std::string path;
1723 auto process = tc->getProcessPtr();
1724
1725 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
1726 return -EFAULT;
1727
1728 // Adjust path for cwd and redirection
1729 path = process->checkPathRedirect(path);
1730
1731 struct statfs hostBuf;
1732 int result = statfs(path.c_str(), &hostBuf);
1733
1734 if (result < 0)
1735 return -errno;
1736
1737 copyOutStatfsBuf<OS>(tgt_stat, &hostBuf);
1738 return 0;
1739#else
1740 warnUnsupportedOS("statfs");
1741 return -1;
1742#endif
1743}
1744
1745template <class OS>
1746SyscallReturn
1747doClone(SyscallDesc *desc, ThreadContext *tc, RegVal flags, RegVal newStack,
1748 VPtr<> ptidPtr, VPtr<> ctidPtr, VPtr<> tlsPtr)
1749{
1750 DPRINTF(SyscallVerbose, "Doing clone. pid: %#llx, ctid: %#llx, tls: %#llx"
1751 " flags: %#llx, stack: %#llx\n",
1752 ptidPtr.addr(), ctidPtr.addr(), tlsPtr.addr(), flags, newStack);
1753 auto p = tc->getProcessPtr();
1754
1755 if (((flags & OS::TGT_CLONE_SIGHAND)&& !(flags & OS::TGT_CLONE_VM)) ||
1756 ((flags & OS::TGT_CLONE_THREAD) && !(flags & OS::TGT_CLONE_SIGHAND)) ||
1757 ((flags & OS::TGT_CLONE_FS) && (flags & OS::TGT_CLONE_NEWNS)) ||
1758 ((flags & OS::TGT_CLONE_NEWIPC) && (flags & OS::TGT_CLONE_SYSVSEM)) ||
1759 ((flags & OS::TGT_CLONE_NEWPID) && (flags & OS::TGT_CLONE_THREAD)) ||
1760 ((flags & OS::TGT_CLONE_VM) && !(newStack)))
1761 return -EINVAL;
1762
1763 ThreadContext *ctc;
1764 if (!(ctc = tc->getSystemPtr()->threads.findFree())) {
1765 DPRINTF_SYSCALL(Verbose, "clone: no spare thread context in system"
1766 "[cpu %d, thread %d]", tc->cpuId(), tc->threadId());
1767 return -EAGAIN;
1768 }
1769
1776 ProcessParams *pp = new ProcessParams();
1777 pp->executable.assign(*(new std::string(p->progName())));
1778 pp->cmd.push_back(*(new std::string(p->progName())));
1779 pp->system = p->system;
1780 pp->cwd.assign(p->tgtCwd);
1781 pp->input.assign("stdin");
1782 pp->output.assign("stdout");
1783 pp->errout.assign("stderr");
1784 pp->uid = p->uid();
1785 pp->euid = p->euid();
1786 pp->gid = p->gid();
1787 pp->egid = p->egid();
1788 pp->release = p->release;
1789
1790 /* Find the first free PID that's less than the maximum */
1791 std::set<int> const& pids = p->system->PIDs;
1792 int temp_pid = *pids.begin();
1793 do {
1794 temp_pid++;
1795 } while (pids.find(temp_pid) != pids.end());
1796 if (temp_pid >= System::maxPID)
1797 fatal("temp_pid is too large: %d", temp_pid);
1798
1799 pp->pid = temp_pid;
1800 pp->ppid = (flags & OS::TGT_CLONE_THREAD) ? p->ppid() : p->pid();
1801 pp->useArchPT = p->useArchPT;
1802 pp->kvmInSE = p->kvmInSE;
1803 Process *cp = pp->create();
1804 // TODO: there is no way to know when the Process SimObject is done with
1805 // the params pointer. Both the params pointer (pp) and the process
1806 // pointer (cp) are normally managed in python and are never cleaned up.
1807
1808 Process *owner = ctc->getProcessPtr();
1809 ctc->setProcessPtr(cp);
1810 cp->assignThreadContext(ctc->contextId());
1811 owner->revokeThreadContext(ctc->contextId());
1812
1813 if (flags & OS::TGT_CLONE_PARENT_SETTID) {
1814 BufferArg ptidBuf(ptidPtr, sizeof(long));
1815 long *ptid = (long *)ptidBuf.bufferPtr();
1816 *ptid = cp->pid();
1817 ptidBuf.copyOut(SETranslatingPortProxy(tc));
1818 }
1819
1820 if (flags & OS::TGT_CLONE_THREAD) {
1821 cp->pTable->initState();
1822 cp->pTable->shared = true;
1823 cp->useForClone = true;
1824 }
1825
1826 ctc->setUseForClone(true);
1827 cp->initState();
1828 p->clone(tc, ctc, cp, flags);
1829
1830 if (flags & OS::TGT_CLONE_THREAD) {
1831 delete cp->sigchld;
1832 cp->sigchld = p->sigchld;
1833 } else if (flags & OS::TGT_SIGCHLD) {
1834 *cp->sigchld = true;
1835 }
1836
1837 if (flags & OS::TGT_CLONE_CHILD_SETTID) {
1838 BufferArg ctidBuf(ctidPtr, sizeof(long));
1839 long *ctid = (long *)ctidBuf.bufferPtr();
1840 *ctid = cp->pid();
1841 ctidBuf.copyOut(SETranslatingPortProxy(ctc));
1842 }
1843
1844 if (flags & OS::TGT_CLONE_CHILD_CLEARTID)
1845 cp->childClearTID = (uint64_t)ctidPtr;
1846
1847 ctc->clearArchRegs();
1848
1849 OS::archClone(flags, p, cp, tc, ctc, newStack, tlsPtr);
1850
1851 desc->returnInto(ctc, 0);
1852
1853 ctc->activate();
1854
1855 if (flags & OS::TGT_CLONE_VFORK) {
1856 tc->suspend();
1857 }
1858
1859 return cp->pid();
1860}
1861
1862template <class OS>
1863SyscallReturn
1864clone3Func(SyscallDesc *desc, ThreadContext *tc,
1865 VPtr<typename OS::tgt_clone_args> cl_args, RegVal size)
1866{
1867 VPtr<uint64_t> ptidPtr((Addr)cl_args->parent_tid, tc);
1868 VPtr<uint64_t> ctidPtr((Addr)cl_args->child_tid, tc);
1869 VPtr<uint64_t> tlsPtr((Addr)cl_args->tls, tc);
1870 // Clone3 gives the stack as the *lowest* address, but clone/__clone2
1871 // expects the stack parameter to be the actual stack pointer
1872 uint64_t new_stack = cl_args->stack + cl_args->stack_size;
1873 uint64_t flags = cl_args->flags;
1874
1875 return doClone<OS>(desc, tc, flags, new_stack, ptidPtr, ctidPtr, tlsPtr);
1876}
1877
1878template <class OS>
1879SyscallReturn
1880cloneFunc(SyscallDesc *desc, ThreadContext *tc, RegVal flags, RegVal newStack,
1881 VPtr<> ptidPtr, VPtr<> ctidPtr, VPtr<> tlsPtr)
1882{
1883 return doClone<OS>(desc, tc, flags, newStack, ptidPtr, ctidPtr, tlsPtr);
1884}
1885
1886template <class OS>
1887SyscallReturn
1888cloneBackwardsFunc(SyscallDesc *desc, ThreadContext *tc, RegVal flags,
1889 RegVal newStack, VPtr<> ptidPtr, VPtr<> tlsPtr,
1890 VPtr<> ctidPtr)
1891{
1892 return cloneFunc<OS>(desc, tc, flags, newStack, ptidPtr, ctidPtr, tlsPtr);
1893}
1894
1896template <class OS>
1897SyscallReturn
1898fstatfsFunc(SyscallDesc *desc, ThreadContext *tc,
1899 int tgt_fd, VPtr<typename OS::tgt_statfs> tgt_stat)
1900{
1901 auto p = tc->getProcessPtr();
1902
1903 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
1904 if (!ffdp)
1905 return -EBADF;
1906 int sim_fd = ffdp->getSimFD();
1907
1908 struct statfs hostBuf;
1909 int result = fstatfs(sim_fd, &hostBuf);
1910
1911 if (result < 0)
1912 return -errno;
1913
1914 copyOutStatfsBuf<OS>(tgt_stat, &hostBuf);
1915
1916 return 0;
1917}
1918
1920template <class OS>
1921SyscallReturn
1922readvFunc(SyscallDesc *desc, ThreadContext *tc,
1923 int tgt_fd, VPtr<> tiov_base,
1924 typename OS::size_t count)
1925{
1926 auto p = tc->getProcessPtr();
1927
1928 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
1929 if (!ffdp)
1930 return -EBADF;
1931 int sim_fd = ffdp->getSimFD();
1932
1933 SETranslatingPortProxy prox(tc);
1934 typename OS::tgt_iovec tiov[count];
1935 struct iovec hiov[count];
1936 for (typename OS::size_t i = 0; i < count; ++i) {
1937 prox.readBlob(tiov_base + (i * sizeof(typename OS::tgt_iovec)),
1938 &tiov[i], sizeof(typename OS::tgt_iovec));
1939 hiov[i].iov_len = gtoh(tiov[i].iov_len, OS::byteOrder);
1940 hiov[i].iov_base = new char [hiov[i].iov_len];
1941 }
1942
1943 int result = readv(sim_fd, hiov, count);
1944 int local_errno = errno;
1945
1946 for (typename OS::size_t i = 0; i < count; ++i) {
1947 if (result != -1) {
1948 prox.writeBlob(htog(tiov[i].iov_base, OS::byteOrder),
1949 hiov[i].iov_base, hiov[i].iov_len);
1950 }
1951 delete [] (char *)hiov[i].iov_base;
1952 }
1953
1954 return (result == -1) ? -local_errno : result;
1955}
1956
1958template <class OS>
1959SyscallReturn
1960writevFunc(SyscallDesc *desc, ThreadContext *tc,
1961 int tgt_fd, VPtr<> tiov_base,
1962 typename OS::size_t count)
1963{
1964 auto p = tc->getProcessPtr();
1965
1966 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
1967 if (!hbfdp)
1968 return -EBADF;
1969 int sim_fd = hbfdp->getSimFD();
1970
1971 SETranslatingPortProxy prox(tc);
1972 struct iovec hiov[count];
1973 for (typename OS::size_t i = 0; i < count; ++i) {
1974 typename OS::tgt_iovec tiov;
1975
1976 prox.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
1977 &tiov, sizeof(typename OS::tgt_iovec));
1978 hiov[i].iov_len = gtoh(tiov.iov_len, OS::byteOrder);
1979 hiov[i].iov_base = new char [hiov[i].iov_len];
1980 prox.readBlob(gtoh(tiov.iov_base, OS::byteOrder), hiov[i].iov_base,
1981 hiov[i].iov_len);
1982 }
1983
1984 int result = writev(sim_fd, hiov, count);
1985
1986 for (typename OS::size_t i = 0; i < count; ++i)
1987 delete [] (char *)hiov[i].iov_base;
1988
1989 return (result == -1) ? -errno : result;
1990}
1991
1993template <class OS>
1994SyscallReturn
1995mmapFunc(SyscallDesc *desc, ThreadContext *tc,
1996 VPtr<> start, typename OS::size_t length, int prot,
1997 int tgt_flags, int tgt_fd, typename OS::off_t offset)
1998{
1999 auto p = tc->getProcessPtr();
2000 Addr page_bytes = p->pTable->pageSize();
2001
2002 if (start & (page_bytes - 1) ||
2003 offset & (page_bytes - 1) ||
2004 (tgt_flags & OS::TGT_MAP_PRIVATE &&
2005 tgt_flags & OS::TGT_MAP_SHARED) ||
2006 (!(tgt_flags & OS::TGT_MAP_PRIVATE) &&
2007 !(tgt_flags & OS::TGT_MAP_SHARED)) ||
2008 !length) {
2009 return -EINVAL;
2010 }
2011
2012 if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) {
2013 // With shared mmaps, there are two cases to consider:
2014 // 1) anonymous: writes should modify the mapping and this should be
2015 // visible to observers who share the mapping. Currently, it's
2016 // difficult to update the shared mapping because there's no
2017 // structure which maintains information about the which virtual
2018 // memory areas are shared. If that structure existed, it would be
2019 // possible to make the translations point to the same frames.
2020 // 2) file-backed: writes should modify the mapping and the file
2021 // which is backed by the mapping. The shared mapping problem is the
2022 // same as what was mentioned about the anonymous mappings. For
2023 // file-backed mappings, the writes to the file are difficult
2024 // because it requires syncing what the mapping holds with the file
2025 // that resides on the host system. So, any write on a real system
2026 // would cause the change to be propagated to the file mapping at
2027 // some point in the future (the inode is tracked along with the
2028 // mapping). This isn't guaranteed to always happen, but it usually
2029 // works well enough. The guarantee is provided by the msync system
2030 // call. We could force the change through with shared mappings with
2031 // a call to msync, but that again would require more information
2032 // than we currently maintain.
2033 warn_once("mmap: writing to shared mmap region is currently "
2034 "unsupported. The write succeeds on the target, but it "
2035 "will not be propagated to the host or shared mappings");
2036 }
2037
2038 length = roundUp(length, page_bytes);
2039
2040 int sim_fd = -1;
2041 if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) {
2042 std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd];
2043
2044 auto dfdp = std::dynamic_pointer_cast<DeviceFDEntry>(fdep);
2045 if (dfdp) {
2046 EmulatedDriver *emul_driver = dfdp->getDriver();
2047 return emul_driver->mmap(tc, start, length, prot, tgt_flags,
2048 tgt_fd, offset);
2049 }
2050
2051 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
2052 if (!ffdp)
2053 return -EBADF;
2054 sim_fd = ffdp->getSimFD();
2055
2064 if (p->interpImage.contains(tc->pcState().instAddr())) {
2065 std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd];
2066 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
2067 auto *lib = loader::createObjectFile(p->checkPathRedirect(
2068 ffdp->getFileName()));
2069 DPRINTF_SYSCALL(Verbose, "Loading symbols from %s\n",
2070 ffdp->getFileName());
2071
2072 if (lib) {
2073 Addr offset = lib->buildImage().minAddr() + start;
2074 loader::debugSymbolTable.insert(*lib->symtab().offset(offset));
2075 }
2076 }
2077 }
2078
2082 if (!(tgt_flags & OS::TGT_MAP_FIXED)) {
2090 if (!(start && p->memState->isUnmapped(start, length))) {
2094 start = p->memState->extendMmap(length);
2095 }
2096 }
2097
2098 DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n",
2099 start, start + length - 1);
2100
2106 if (tgt_flags & OS::TGT_MAP_FIXED) {
2111 p->memState->unmapRegion(start, length);
2112 }
2113
2117 std::string region_name;
2118 if (tgt_flags & OS::TGT_MAP_ANONYMOUS) {
2119 region_name = "anon";
2120 } else {
2121 std::shared_ptr<FDEntry> fdep = (*p->fds)[tgt_fd];
2122 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(fdep);
2123 region_name = ffdp->getFileName();
2124 }
2125
2130 p->memState->mapRegion(start, length, region_name, sim_fd, offset);
2131
2132 return (Addr)start;
2133}
2134
2135template <class OS>
2136SyscallReturn
2137pread64Func(SyscallDesc *desc, ThreadContext *tc,
2138 int tgt_fd, VPtr<> bufPtr, typename OS::size_t nbytes,
2139 typename OS::off_t offset)
2140{
2141 auto p = tc->getProcessPtr();
2142
2143 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
2144 if (!ffdp)
2145 return -EBADF;
2146 int sim_fd = ffdp->getSimFD();
2147
2148 BufferArg bufArg(bufPtr, nbytes);
2149
2150 int bytes_read = pread(sim_fd, bufArg.bufferPtr(), nbytes, offset);
2151
2152 bufArg.copyOut(SETranslatingPortProxy(tc));
2153
2154 return (bytes_read == -1) ? -errno : bytes_read;
2155}
2156
2157template <class OS>
2158SyscallReturn
2159pwrite64Func(SyscallDesc *desc, ThreadContext *tc,
2160 int tgt_fd, VPtr<> bufPtr, typename OS::size_t nbytes,
2161 typename OS::off_t offset)
2162{
2163 auto p = tc->getProcessPtr();
2164
2165 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
2166 if (!ffdp)
2167 return -EBADF;
2168 int sim_fd = ffdp->getSimFD();
2169
2170 BufferArg bufArg(bufPtr, nbytes);
2171 bufArg.copyIn(SETranslatingPortProxy(tc));
2172
2173 int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset);
2174
2175 return (bytes_written == -1) ? -errno : bytes_written;
2176}
2177
2179template <class OS>
2180SyscallReturn
2181mmap2Func(SyscallDesc *desc, ThreadContext *tc,
2182 VPtr<> start, typename OS::size_t length, int prot,
2183 int tgt_flags, int tgt_fd, typename OS::off_t offset)
2184{
2185 auto page_size = tc->getProcessPtr()->pTable->pageSize();
2186 return mmapFunc<OS>(desc, tc, start, length, prot, tgt_flags,
2187 tgt_fd, offset * page_size);
2188}
2189
2191template <class OS>
2192SyscallReturn
2193getrlimitFunc(SyscallDesc *desc, ThreadContext *tc,
2194 unsigned resource, VPtr<typename OS::rlimit> rlp)
2195{
2196 const ByteOrder bo = OS::byteOrder;
2197 switch (resource) {
2198 case OS::TGT_RLIMIT_STACK:
2199 // max stack size in bytes: make up a number (8MiB for now)
2200 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
2201 rlp->rlim_cur = htog(rlp->rlim_cur, bo);
2202 rlp->rlim_max = htog(rlp->rlim_max, bo);
2203 break;
2204
2205 case OS::TGT_RLIMIT_DATA:
2206 // max data segment size in bytes: make up a number
2207 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
2208 rlp->rlim_cur = htog(rlp->rlim_cur, bo);
2209 rlp->rlim_max = htog(rlp->rlim_max, bo);
2210 break;
2211
2212 case OS::TGT_RLIMIT_NPROC:
2213 rlp->rlim_cur = rlp->rlim_max = tc->getSystemPtr()->threads.size();
2214 rlp->rlim_cur = htog(rlp->rlim_cur, bo);
2215 rlp->rlim_max = htog(rlp->rlim_max, bo);
2216 break;
2217
2218 default:
2219 warn("getrlimit: unimplemented resource %d", resource);
2220 return -EINVAL;
2221 break;
2222 }
2223
2224 return 0;
2225}
2226
2227template <class OS>
2228SyscallReturn
2229prlimitFunc(SyscallDesc *desc, ThreadContext *tc,
2230 int pid, int resource, VPtr<> n, VPtr<typename OS::rlimit> rlp)
2231{
2232 if (pid != 0) {
2233 warn("prlimit: ignoring rlimits for nonzero pid");
2234 return -EPERM;
2235 }
2236 if (n)
2237 warn("prlimit: ignoring new rlimit");
2238 if (rlp) {
2239 const ByteOrder bo = OS::byteOrder;
2240 switch (resource) {
2241 case OS::TGT_RLIMIT_STACK:
2242 // max stack size in bytes: make up a number (8MiB for now)
2243 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
2244 rlp->rlim_cur = htog(rlp->rlim_cur, bo);
2245 rlp->rlim_max = htog(rlp->rlim_max, bo);
2246 break;
2247 case OS::TGT_RLIMIT_DATA:
2248 // max data segment size in bytes: make up a number
2249 rlp->rlim_cur = rlp->rlim_max = 256*1024*1024;
2250 rlp->rlim_cur = htog(rlp->rlim_cur, bo);
2251 rlp->rlim_max = htog(rlp->rlim_max, bo);
2252 break;
2253 default:
2254 warn("prlimit: unimplemented resource %d", resource);
2255 return -EINVAL;
2256 break;
2257 }
2258 }
2259 return 0;
2260}
2261
2263template <class OS>
2264SyscallReturn
2265clock_gettimeFunc(SyscallDesc *desc, ThreadContext *tc,
2266 int clk_id, VPtr<typename OS::timespec> tp)
2267{
2268 getElapsedTimeNano(tp->tv_sec, tp->tv_nsec);
2269 tp->tv_sec += seconds_since_epoch;
2270 tp->tv_sec = htog(tp->tv_sec, OS::byteOrder);
2271 tp->tv_nsec = htog(tp->tv_nsec, OS::byteOrder);
2272
2273 return 0;
2274}
2275
2277template <class OS>
2278SyscallReturn
2279clock_getresFunc(SyscallDesc *desc, ThreadContext *tc, int clk_id,
2280 VPtr<typename OS::timespec> tp)
2281{
2282 // Set resolution at ns, which is what clock_gettime() returns
2283 tp->tv_sec = 0;
2284 tp->tv_nsec = 1;
2285
2286 return 0;
2287}
2288
2290template <class OS>
2291SyscallReturn
2292gettimeofdayFunc(SyscallDesc *desc, ThreadContext *tc,
2293 VPtr<typename OS::timeval> tp, VPtr<> tz_ptr)
2294{
2295 getElapsedTimeMicro(tp->tv_sec, tp->tv_usec);
2296 tp->tv_sec += seconds_since_epoch;
2297 tp->tv_sec = htog(tp->tv_sec, OS::byteOrder);
2298 tp->tv_usec = htog(tp->tv_usec, OS::byteOrder);
2299
2300 return 0;
2301}
2302
2304template <class OS>
2305SyscallReturn
2306futimesatFunc(SyscallDesc *desc, ThreadContext *tc,
2307 int dirfd, VPtr<> pathname, VPtr<typename OS::timeval [2]> tp)
2308{
2309 std::string path;
2310 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
2311 return -EFAULT;
2312
2313 // Modifying path from the directory descriptor
2314 if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
2315 return res;
2316 }
2317
2318 struct timeval hostTimeval[2];
2319 for (int i = 0; i < 2; ++i) {
2320 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec, OS::byteOrder);
2321 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec, OS::byteOrder);
2322 }
2323
2324 // Adjust path for cwd and redirection
2325 auto process = tc->getProcessPtr();
2326 path = process->checkPathRedirect(path);
2327
2328 int result = utimes(path.c_str(), hostTimeval);
2329
2330 if (result < 0)
2331 return -errno;
2332
2333 return 0;
2334}
2335
2337template <class OS>
2338SyscallReturn
2339utimesFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname,
2340 VPtr<typename OS::timeval [2]> tp)
2341{
2342 return futimesatFunc<OS>(desc, tc, OS::TGT_AT_FDCWD, pathname, tp);
2343}
2344
2345template <class OS>
2346SyscallReturn
2347execveFunc(SyscallDesc *desc, ThreadContext *tc,
2348 VPtr<> pathname, VPtr<> argv_mem_loc, VPtr<> envp_mem_loc)
2349{
2350 auto p = tc->getProcessPtr();
2351
2352 std::string path;
2353 SETranslatingPortProxy mem_proxy(tc);
2354 if (!mem_proxy.tryReadString(path, pathname))
2355 return -EFAULT;
2356
2357 if (access(path.c_str(), F_OK) == -1)
2358 return -EACCES;
2359
2360 auto read_in = [](std::vector<std::string> &vect,
2361 PortProxy &mem_proxy, VPtr<> mem_loc)
2362 {
2363 for (int inc = 0; ; inc++) {
2364 BufferArg b((mem_loc + sizeof(Addr) * inc), sizeof(Addr));
2365 b.copyIn(mem_proxy);
2366
2367 if (!*(Addr*)b.bufferPtr())
2368 break;
2369
2370 vect.push_back(std::string());
2371 mem_proxy.tryReadString(vect[inc], *(Addr*)b.bufferPtr());
2372 }
2373 };
2374
2379 if (!p->vforkContexts.empty()) {
2380 ThreadContext *vtc = p->system->threads[p->vforkContexts.front()];
2381 assert(vtc->status() == ThreadContext::Suspended);
2382 vtc->activate();
2383 }
2384
2391 ProcessParams *pp = new ProcessParams();
2392 pp->executable = path;
2393 read_in(pp->cmd, mem_proxy, argv_mem_loc);
2394 read_in(pp->env, mem_proxy, envp_mem_loc);
2395 pp->uid = p->uid();
2396 pp->egid = p->egid();
2397 pp->euid = p->euid();
2398 pp->gid = p->gid();
2399 pp->ppid = p->ppid();
2400 pp->pid = p->pid();
2401 pp->input.assign("cin");
2402 pp->output.assign("cout");
2403 pp->errout.assign("cerr");
2404 pp->cwd.assign(p->tgtCwd);
2405 pp->system = p->system;
2406 pp->release = p->release;
2415 p->system->PIDs.erase(p->pid());
2416 Process *new_p = pp->create();
2417 // TODO: there is no way to know when the Process SimObject is done with
2418 // the params pointer. Both the params pointer (pp) and the process
2419 // pointer (p) are normally managed in python and are never cleaned up.
2420
2425 new_p->fds = p->fds;
2426 for (int i = 0; i < new_p->fds->getSize(); i++) {
2427 std::shared_ptr<FDEntry> fdep = (*new_p->fds)[i];
2428 if (fdep && fdep->getCOE())
2429 new_p->fds->closeFDEntry(i);
2430 }
2431
2432 *new_p->sigchld = true;
2433
2434 tc->clearArchRegs();
2435 tc->setProcessPtr(new_p);
2436 new_p->assignThreadContext(tc->contextId());
2437 new_p->init();
2438 new_p->initState();
2439 tc->activate();
2440
2441 return SyscallReturn();
2442}
2443
2445template <class OS>
2446SyscallReturn
2447getrusageFunc(SyscallDesc *desc, ThreadContext *tc,
2448 int who /* THREAD, SELF, or CHILDREN */,
2449 VPtr<typename OS::rusage> rup)
2450{
2451 rup->ru_utime.tv_sec = 0;
2452 rup->ru_utime.tv_usec = 0;
2453 rup->ru_stime.tv_sec = 0;
2454 rup->ru_stime.tv_usec = 0;
2455 rup->ru_maxrss = 0;
2456 rup->ru_ixrss = 0;
2457 rup->ru_idrss = 0;
2458 rup->ru_isrss = 0;
2459 rup->ru_minflt = 0;
2460 rup->ru_majflt = 0;
2461 rup->ru_nswap = 0;
2462 rup->ru_inblock = 0;
2463 rup->ru_oublock = 0;
2464 rup->ru_msgsnd = 0;
2465 rup->ru_msgrcv = 0;
2466 rup->ru_nsignals = 0;
2467 rup->ru_nvcsw = 0;
2468 rup->ru_nivcsw = 0;
2469
2470 switch (who) {
2471 case OS::TGT_RUSAGE_SELF:
2472 getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
2473 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec, OS::byteOrder);
2474 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec, OS::byteOrder);
2475 break;
2476
2477 case OS::TGT_RUSAGE_CHILDREN:
2478 // do nothing. We have no child processes, so they take no time.
2479 break;
2480
2481 default:
2482 // don't really handle THREAD or CHILDREN, but just warn and
2483 // plow ahead
2484 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
2485 who);
2486 }
2487
2488 return 0;
2489}
2490
2492template <class OS>
2493SyscallReturn
2494timesFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<typename OS::tms> bufp)
2495{
2496 // Fill in the time structure (in clocks)
2497 int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / sim_clock::as_int::s;
2498 bufp->tms_utime = clocks;
2499 bufp->tms_stime = 0;
2500 bufp->tms_cutime = 0;
2501 bufp->tms_cstime = 0;
2502
2503 // Convert to host endianness
2504 bufp->tms_utime = htog(bufp->tms_utime, OS::byteOrder);
2505
2506 // Return clock ticks since system boot
2507 return clocks;
2508}
2509
2511template <class OS>
2512SyscallReturn
2513timeFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> taddr)
2514{
2515 typename OS::time_t sec, usec;
2516 getElapsedTimeMicro(sec, usec);
2517 sec += seconds_since_epoch;
2518
2519 SETranslatingPortProxy p(tc);
2520 if (taddr != 0) {
2521 typename OS::time_t t = sec;
2522 t = htog(t, OS::byteOrder);
2523 p.writeBlob(taddr, &t, (int)sizeof(typename OS::time_t));
2524 }
2525 return sec;
2526}
2527
2528template <class OS>
2529SyscallReturn
2530tgkillFunc(SyscallDesc *desc, ThreadContext *tc, int tgid, int tid, int sig)
2531{
2547 System *sys = tc->getSystemPtr();
2548 Process *tgt_proc = nullptr;
2549 for (auto *tc: sys->threads) {
2550 Process *temp = tc->getProcessPtr();
2551 if (temp->pid() == tid) {
2552 tgt_proc = temp;
2553 break;
2554 }
2555 }
2556
2557 if (sig != 0 && sig != OS::TGT_SIGABRT)
2558 return -EINVAL;
2559
2560 if (tgt_proc == nullptr)
2561 return -ESRCH;
2562
2563 if (tgid != -1 && tgt_proc->tgid() != tgid)
2564 return -ESRCH;
2565
2566 if (sig == OS::TGT_SIGABRT)
2567 exitGroupFunc(desc, tc, 0);
2568
2569 return 0;
2570}
2571
2572template <class OS>
2573SyscallReturn
2574socketFunc(SyscallDesc *desc, ThreadContext *tc,
2575 int domain, int type, int prot)
2576{
2577 auto p = tc->getProcessPtr();
2578
2579 int sim_fd = socket(domain, type, prot);
2580 if (sim_fd == -1)
2581 return -errno;
2582
2583 auto sfdp = std::make_shared<SocketFDEntry>(sim_fd, domain, type, prot);
2584 int tgt_fd = p->fds->allocFD(sfdp);
2585
2586 return tgt_fd;
2587}
2588
2589template <class OS>
2590SyscallReturn
2591socketpairFunc(SyscallDesc *desc, ThreadContext *tc,
2592 int domain, int type, int prot, VPtr<> svPtr)
2593{
2594 auto p = tc->getProcessPtr();
2595
2596 BufferArg svBuf((Addr)svPtr, 2 * sizeof(int));
2597 int status = socketpair(domain, type, prot, (int *)svBuf.bufferPtr());
2598 if (status == -1)
2599 return -errno;
2600
2601 int *fds = (int *)svBuf.bufferPtr();
2602
2603 auto sfdp1 = std::make_shared<SocketFDEntry>(fds[0], domain, type, prot);
2604 fds[0] = p->fds->allocFD(sfdp1);
2605 auto sfdp2 = std::make_shared<SocketFDEntry>(fds[1], domain, type, prot);
2606 fds[1] = p->fds->allocFD(sfdp2);
2607 svBuf.copyOut(SETranslatingPortProxy(tc));
2608
2609 return status;
2610}
2611
2612template <class OS>
2613SyscallReturn
2614selectFunc(SyscallDesc *desc, ThreadContext *tc, int nfds,
2615 VPtr<typename OS::fd_set> readfds,
2616 VPtr<typename OS::fd_set> writefds,
2617 VPtr<typename OS::fd_set> errorfds,
2618 VPtr<typename OS::timeval> timeout)
2619{
2620 int retval;
2621
2622 auto p = tc->getProcessPtr();
2623
2629 fd_set readfds_h;
2630 FD_ZERO(&readfds_h);
2631 fd_set writefds_h;
2632 FD_ZERO(&writefds_h);
2633 fd_set errorfds_h;
2634 FD_ZERO(&errorfds_h);
2635
2645 int nfds_h = 0;
2646 std::map<int, int> trans_map;
2647 auto try_add_host_set = [&](typename OS::fd_set *tgt_set_entry,
2648 fd_set *hst_set_entry,
2649 int iter) -> bool
2650 {
2656 if (FD_ISSET(iter, (fd_set *)tgt_set_entry)) {
2662 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[iter]);
2663 if (!hbfdp)
2664 return true;
2665 auto sim_fd = hbfdp->getSimFD();
2666
2672 trans_map[sim_fd] = iter;
2673
2679 nfds_h = std::max(nfds_h - 1, sim_fd + 1);
2680
2685 FD_SET(sim_fd, hst_set_entry);
2686 }
2687 return false;
2688 };
2689
2690 for (int i = 0; i < nfds; i++) {
2691 if (readfds) {
2692 bool ebadf = try_add_host_set(readfds, &readfds_h, i);
2693 if (ebadf)
2694 return -EBADF;
2695 }
2696 if (writefds) {
2697 bool ebadf = try_add_host_set(writefds, &writefds_h, i);
2698 if (ebadf)
2699 return -EBADF;
2700 }
2701 if (errorfds) {
2702 bool ebadf = try_add_host_set(errorfds, &errorfds_h, i);
2703 if (ebadf)
2704 return -EBADF;
2705 }
2706 }
2707
2708 if (timeout) {
2716 timeout->tv_sec = 0;
2717 timeout->tv_usec = 0;
2718
2719 retval = select(nfds_h,
2720 readfds ? &readfds_h : nullptr,
2721 writefds ? &writefds_h : nullptr,
2722 errorfds ? &errorfds_h : nullptr,
2723 (timeval *)(typename OS::timeval *)timeout);
2724 } else {
2732 struct timeval tv = { 0, 0 };
2733
2734 retval = select(nfds_h,
2735 readfds ? &readfds_h : nullptr,
2736 readfds ? &writefds_h : nullptr,
2737 readfds ? &errorfds_h : nullptr,
2738 &tv);
2739
2740 if (retval == 0) {
2746 for (auto sig : tc->getSystemPtr()->signalList)
2747 if (sig.receiver == p)
2748 return -EINTR;
2749 return SyscallReturn::retry();
2750 }
2751 }
2752
2753 if (retval == -1)
2754 return -errno;
2755
2756 if (readfds) {
2757 FD_ZERO(reinterpret_cast<fd_set *>((typename OS::fd_set *)readfds));
2758 }
2759 if (writefds) {
2760 FD_ZERO(reinterpret_cast<fd_set *>((typename OS::fd_set *)writefds));
2761 }
2762 if (errorfds) {
2763 FD_ZERO(reinterpret_cast<fd_set *>((typename OS::fd_set *)errorfds));
2764 }
2765
2771 for (int i = 0; i < nfds_h; i++) {
2772 if (readfds && FD_ISSET(i, &readfds_h))
2773 FD_SET(trans_map[i],
2774 reinterpret_cast<fd_set *>(
2775 (typename OS::fd_set *)readfds));
2776
2777 if (writefds && FD_ISSET(i, &writefds_h))
2778 FD_SET(trans_map[i],
2779 reinterpret_cast<fd_set *>(
2780 (typename OS::fd_set *)writefds));
2781
2782 if (errorfds && FD_ISSET(i, &errorfds_h))
2783 FD_SET(trans_map[i],
2784 reinterpret_cast<fd_set *>(
2785 (typename OS::fd_set *)errorfds));
2786 }
2787
2788 return retval;
2789}
2790
2791template <class OS>
2792SyscallReturn
2793readFunc(SyscallDesc *desc, ThreadContext *tc,
2794 int tgt_fd, VPtr<> buf_ptr, typename OS::size_t nbytes)
2795{
2796 auto p = tc->getProcessPtr();
2797
2798 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
2799 if (!hbfdp)
2800 return -EBADF;
2801 int sim_fd = hbfdp->getSimFD();
2802
2803 struct pollfd pfd;
2804 pfd.fd = sim_fd;
2805 pfd.events = POLLIN | POLLPRI;
2806 if ((poll(&pfd, 1, 0) == 0)
2807 && !(hbfdp->getFlags() & OS::TGT_O_NONBLOCK))
2808 return SyscallReturn::retry();
2809
2810 BufferArg buf_arg(buf_ptr, nbytes);
2811 int bytes_read = read(sim_fd, buf_arg.bufferPtr(), nbytes);
2812
2813 if (bytes_read > 0)
2814 buf_arg.copyOut(SETranslatingPortProxy(tc));
2815
2816 return (bytes_read == -1) ? -errno : bytes_read;
2817}
2818
2819template <class OS>
2820SyscallReturn
2821writeFunc(SyscallDesc *desc, ThreadContext *tc,
2822 int tgt_fd, VPtr<> buf_ptr, typename OS::size_t nbytes)
2823{
2824 auto p = tc->getProcessPtr();
2825
2826 auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
2827 if (!hbfdp)
2828 return -EBADF;
2829 int sim_fd = hbfdp->getSimFD();
2830
2831 BufferArg buf_arg(buf_ptr, nbytes);
2832 buf_arg.copyIn(SETranslatingPortProxy(tc));
2833
2834 struct pollfd pfd;
2835 pfd.fd = sim_fd;
2836 pfd.events = POLLOUT;
2837
2844 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>(hbfdp);
2845 if (ffdp && (ffdp->getFileName() != "/dev/random")) {
2846 if (!poll(&pfd, 1, 0) && !(ffdp->getFlags() & OS::TGT_O_NONBLOCK))
2847 return SyscallReturn::retry();
2848 }
2849
2850 int bytes_written = write(sim_fd, buf_arg.bufferPtr(), nbytes);
2851
2852 if (bytes_written != -1)
2853 fsync(sim_fd);
2854
2855 return (bytes_written == -1) ? -errno : bytes_written;
2856}
2857
2858template <class OS>
2859SyscallReturn
2860wait4Func(SyscallDesc *desc, ThreadContext *tc,
2861 pid_t pid, VPtr<> statPtr, int options, VPtr<> rusagePtr)
2862{
2863 auto p = tc->getProcessPtr();
2864
2865 if (rusagePtr)
2866 DPRINTF_SYSCALL(Verbose, "wait4: rusage pointer provided %lx, however "
2867 "functionality not supported. Ignoring rusage pointer.\n",
2868 rusagePtr);
2869
2878 System *sysh = tc->getSystemPtr();
2879 std::list<BasicSignal>::iterator iter;
2880 for (iter=sysh->signalList.begin(); iter!=sysh->signalList.end(); iter++) {
2881 if (iter->receiver == p) {
2882 if (pid < -1) {
2883 if ((iter->sender->pgid() == -pid)
2884 && (iter->signalValue == OS::TGT_SIGCHLD))
2885 goto success;
2886 } else if (pid == -1) {
2887 if (iter->signalValue == OS::TGT_SIGCHLD)
2888 goto success;
2889 } else if (pid == 0) {
2890 if ((iter->sender->pgid() == p->pgid())
2891 && (iter->signalValue == OS::TGT_SIGCHLD))
2892 goto success;
2893 } else {
2894 if ((iter->sender->pid() == pid)
2895 && (iter->signalValue == OS::TGT_SIGCHLD))
2896 goto success;
2897 }
2898 }
2899 }
2900
2901 return (options & OS::TGT_WNOHANG) ? 0 : SyscallReturn::retry();
2902
2903success:
2904 // Set status to EXITED for WIFEXITED evaluations.
2905 const int EXITED = 0;
2906 BufferArg statusBuf(statPtr, sizeof(int));
2907 *(int *)statusBuf.bufferPtr() = EXITED;
2908 statusBuf.copyOut(SETranslatingPortProxy(tc));
2909
2910 // Return the child PID.
2911 pid_t retval = iter->sender->pid();
2912 sysh->signalList.erase(iter);
2913 return retval;
2914}
2915
2916template <class OS>
2917SyscallReturn
2918acceptFunc(SyscallDesc *desc, ThreadContext *tc,
2919 int tgt_fd, VPtr<> addrPtr, VPtr<> lenPtr)
2920{
2921 struct sockaddr sa;
2922 socklen_t addrLen;
2923 int host_fd;
2924 auto p = tc->getProcessPtr();
2925
2926 BufferArg *lenBufPtr = nullptr;
2927 BufferArg *addrBufPtr = nullptr;
2928
2929 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
2930 if (!sfdp)
2931 return -EBADF;
2932 int sim_fd = sfdp->getSimFD();
2933
2940 struct pollfd pfd;
2941 pfd.fd = sim_fd;
2942 pfd.events = POLLIN | POLLPRI;
2943 if ((poll(&pfd, 1, 0) == 0) && !(sfdp->getFlags() & OS::TGT_O_NONBLOCK))
2944 return SyscallReturn::retry();
2945
2946 if (lenPtr) {
2947 lenBufPtr = new BufferArg(lenPtr, sizeof(socklen_t));
2948 lenBufPtr->copyIn(SETranslatingPortProxy(tc));
2949 memcpy(&addrLen, (socklen_t *)lenBufPtr->bufferPtr(),
2950 sizeof(socklen_t));
2951 }
2952
2953 if (addrPtr) {
2954 addrBufPtr = new BufferArg(addrPtr, sizeof(struct sockaddr));
2955 addrBufPtr->copyIn(SETranslatingPortProxy(tc));
2956 memcpy(&sa, (struct sockaddr *)addrBufPtr->bufferPtr(),
2957 sizeof(struct sockaddr));
2958 }
2959
2960 host_fd = accept(sim_fd, &sa, &addrLen);
2961
2962 if (host_fd == -1)
2963 return -errno;
2964
2965 if (addrPtr) {
2966 memcpy(addrBufPtr->bufferPtr(), &sa, sizeof(sa));
2967 addrBufPtr->copyOut(SETranslatingPortProxy(tc));
2968 delete(addrBufPtr);
2969 }
2970
2971 if (lenPtr) {
2972 *(socklen_t *)lenBufPtr->bufferPtr() = addrLen;
2973 lenBufPtr->copyOut(SETranslatingPortProxy(tc));
2974 delete(lenBufPtr);
2975 }
2976
2977 auto afdp = std::make_shared<SocketFDEntry>(host_fd, sfdp->_domain,
2978 sfdp->_type, sfdp->_protocol);
2979 return p->fds->allocFD(afdp);
2980}
2981
2983template <class OS>
2984SyscallReturn
2985eventfdFunc(SyscallDesc *desc, ThreadContext *tc,
2986 unsigned initval, int in_flags)
2987{
2988#if defined(__linux__)
2989 auto p = tc->getProcessPtr();
2990
2991 int sim_fd = eventfd(initval, in_flags);
2992 if (sim_fd == -1)
2993 return -errno;
2994
2995 bool cloexec = in_flags & OS::TGT_O_CLOEXEC;
2996
2997 int flags = cloexec ? OS::TGT_O_CLOEXEC : 0;
2998 flags |= (in_flags & OS::TGT_O_NONBLOCK) ? OS::TGT_O_NONBLOCK : 0;
2999
3000 auto hbfdp = std::make_shared<HBFDEntry>(flags, sim_fd, cloexec);
3001 int tgt_fd = p->fds->allocFD(hbfdp);
3002 return tgt_fd;
3003#else
3004 warnUnsupportedOS("eventfd");
3005 return -1;
3006#endif
3007}
3008
3010template <class OS>
3011SyscallReturn
3012schedGetaffinityFunc(SyscallDesc *desc, ThreadContext *tc,
3013 pid_t pid, typename OS::size_t cpusetsize,
3014 VPtr<> cpu_set_mask)
3015{
3016#if defined(__linux__)
3017 if (cpusetsize < CPU_ALLOC_SIZE(tc->getSystemPtr()->threads.size()))
3018 return -EINVAL;
3019
3020 SETranslatingPortProxy proxy(tc);
3021 BufferArg maskBuf(cpu_set_mask, cpusetsize);
3022 maskBuf.copyIn(proxy);
3023 for (int i = 0; i < tc->getSystemPtr()->threads.size(); i++) {
3024 CPU_SET(i, (cpu_set_t *)maskBuf.bufferPtr());
3025 }
3026 maskBuf.copyOut(proxy);
3027 return CPU_ALLOC_SIZE(tc->getSystemPtr()->threads.size());
3028#else
3029 warnUnsupportedOS("sched_getaffinity");
3030 return -1;
3031#endif
3032}
3033
3034// Target recvfrom() handler.
3035template <class OS>
3036SyscallReturn
3037recvfromFunc(SyscallDesc *desc, ThreadContext *tc,
3038 int tgt_fd, VPtr<> buf_ptr, typename OS::size_t buf_len,
3039 int flags, VPtr<> addr_ptr, VPtr<> addrlen_ptr)
3040{
3041 auto p = tc->getProcessPtr();
3042
3043 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
3044 if (!sfdp)
3045 return -EBADF;
3046 int sim_fd = sfdp->getSimFD();
3047
3048 // Reserve buffer space.
3049 BufferArg buf(buf_ptr, buf_len);
3050
3051 SETranslatingPortProxy proxy(tc);
3052
3053 // Get address length.
3054 socklen_t addr_len = 0;
3055 if (addrlen_ptr != 0) {
3056 // Read address length parameter.
3057 BufferArg addrlen_buf(addrlen_ptr, sizeof(socklen_t));
3058 addrlen_buf.copyIn(proxy);
3059 addr_len = *((socklen_t *)addrlen_buf.bufferPtr());
3060 }
3061
3062 struct sockaddr sa, *sap = NULL;
3063 if (addr_len != 0) {
3064 BufferArg addr_buf(addr_ptr, addr_len);
3065 addr_buf.copyIn(proxy);
3066 memcpy(&sa, (struct sockaddr *)addr_buf.bufferPtr(),
3067 sizeof(struct sockaddr));
3068 sap = &sa;
3069 }
3070
3071 ssize_t recvd_size = recvfrom(sim_fd,
3072 (void *)buf.bufferPtr(),
3073 buf_len, flags, sap, (socklen_t *)&addr_len);
3074
3075 if (recvd_size == -1)
3076 return -errno;
3077
3078 // Pass the received data out.
3079 buf.copyOut(proxy);
3080
3081 // Copy address to addr_ptr and pass it on.
3082 if (sap != NULL) {
3083 BufferArg addr_buf(addr_ptr, addr_len);
3084 memcpy(addr_buf.bufferPtr(), sap, sizeof(sa));
3085 addr_buf.copyOut(proxy);
3086 }
3087
3088 // Copy len to addrlen_ptr and pass it on.
3089 if (addr_len != 0) {
3090 BufferArg addrlen_buf(addrlen_ptr, sizeof(socklen_t));
3091 *(socklen_t *)addrlen_buf.bufferPtr() = addr_len;
3092 addrlen_buf.copyOut(proxy);
3093 }
3094
3095 return recvd_size;
3096}
3097
3098// Target sendto() handler.
3099template <typename OS>
3100SyscallReturn
3101sendtoFunc(SyscallDesc *desc, ThreadContext *tc,
3102 int tgt_fd, VPtr<> buf_ptr, typename OS::size_t buf_len, int flags,
3103 VPtr<> addr_ptr, socklen_t addr_len)
3104{
3105 auto p = tc->getProcessPtr();
3106
3107 auto sfdp = std::dynamic_pointer_cast<SocketFDEntry>((*p->fds)[tgt_fd]);
3108 if (!sfdp)
3109 return -EBADF;
3110 int sim_fd = sfdp->getSimFD();
3111
3112 // Reserve buffer space.
3113 BufferArg buf(buf_ptr, buf_len);
3114 buf.copyIn(SETranslatingPortProxy(tc));
3115
3116 struct sockaddr sa, *sap = nullptr;
3117 memset(&sa, 0, sizeof(sockaddr));
3118 if (addr_len != 0) {
3119 BufferArg addr_buf(addr_ptr, addr_len);
3120 addr_buf.copyIn(SETranslatingPortProxy(tc));
3121 memcpy(&sa, (sockaddr*)addr_buf.bufferPtr(), addr_len);
3122 sap = &sa;
3123 }
3124
3125 ssize_t sent_size = sendto(sim_fd,
3126 (void *)buf.bufferPtr(),
3127 buf_len, flags, sap, (socklen_t)addr_len);
3128
3129 return (sent_size == -1) ? -errno : sent_size;
3130}
3131
3133template <typename OS>
3134SyscallReturn
3135munmapFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> start,
3136 typename OS::size_t length)
3137{
3138 // Even if the system is currently not capable of recycling physical
3139 // pages, there is no reason we can't unmap them so that we trigger
3140 // appropriate seg faults when the application mistakenly tries to
3141 // access them again.
3142 auto p = tc->getProcessPtr();
3143
3144 if (p->pTable->pageOffset(start))
3145 return -EINVAL;
3146
3147 length = roundUp(length, p->pTable->pageSize());
3148
3149 p->memState->unmapRegion(start, length);
3150
3151 return 0;
3152}
3153
3154// Target fallocate() handler.
3155template <typename OS>
3156SyscallReturn
3157fallocateFunc(SyscallDesc *desc, ThreadContext *tc,
3158 int tgt_fd, int mode, typename OS::off_t offset,
3159 typename OS::off_t len)
3160{
3161#if defined(__linux__)
3162 auto p = tc->getProcessPtr();
3163
3164 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
3165 if (!ffdp)
3166 return -EBADF;
3167 int sim_fd = ffdp->getSimFD();
3168
3169 int result = fallocate(sim_fd, mode, offset, len);
3170 if (result < 0)
3171 return -errno;
3172 return 0;
3173#else
3174 warnUnsupportedOS("fallocate");
3175 return -1;
3176#endif
3177}
3178
3180template <typename OS>
3181SyscallReturn
3182truncateFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname,
3183 typename OS::off_t length)
3184{
3185 std::string path;
3186 auto p = tc->getProcessPtr();
3187
3188 if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
3189 return -EFAULT;
3190
3191 // Adjust path for cwd and redirection
3192 path = p->checkPathRedirect(path);
3193
3194 int result = truncate(path.c_str(), length);
3195 return (result == -1) ? -errno : result;
3196}
3197
3199template <typename OS>
3200SyscallReturn
3201ftruncateFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd,
3202 typename OS::off_t length)
3203{
3204 auto p = tc->getProcessPtr();
3205
3206 auto ffdp = std::dynamic_pointer_cast<FileFDEntry>((*p->fds)[tgt_fd]);
3207 if (!ffdp)
3208 return -EBADF;
3209 int sim_fd = ffdp->getSimFD();
3210
3211 int result = ftruncate(sim_fd, length);
3212 return (result == -1) ? -errno : result;
3213}
3214
3215template <typename OS>
3216SyscallReturn
3217getrandomFunc(SyscallDesc *desc, ThreadContext *tc,
3218 VPtr<> buf_ptr, typename OS::size_t count,
3219 unsigned int flags)
3220{
3221 static Random::RandomPtr se_prng = Random::genRandom();
3222 SETranslatingPortProxy proxy(tc);
3223
3224 TypedBufferArg<uint8_t> buf(buf_ptr, count);
3225 for (int i = 0; i < count; ++i) {
3226 buf[i] = se_prng->random<uint8_t>();
3227 }
3228 buf.copyOut(proxy);
3229
3230 return count;
3231}
3232
3233} // namespace gem5
3234
3235#endif // __SIM_SYSCALL_EMUL_HH__
DPRINTF
#define DPRINTF(x,...)
Definition trace.hh:209
types.hh
Defines global host-dependent types: Counter, Tick, and (indirectly) {int,uint}{8,...
gem5::BaseBufferArg::copyIn
bool copyIn(const PortProxy &memproxy)
copy data into simulator space (read from target memory)
Definition syscall_emul_buf.hh:81
gem5::BaseBufferArg::copyOut
bool copyOut(const PortProxy &memproxy)
copy data out of simulator space (write to target memory)
Definition syscall_emul_buf.hh:91
gem5::BufferArg
BufferArg represents an untyped buffer in target user space that is passed by reference to an (emulat...
Definition syscall_emul_buf.hh:108
gem5::BufferArg::bufferPtr
void * bufferPtr()
Return a pointer to the internal simulator-space buffer.
Definition syscall_emul_buf.hh:119
gem5::ConstProxyPtr::addr
Addr addr() const
Definition proxy_ptr.hh:173
gem5::EmulatedDriver
EmulatedDriver is an abstract base class for fake SE-mode device drivers.
Definition emul_driver.hh:56
gem5::EmulatedDriver::ioctl
virtual int ioctl(ThreadContext *tc, unsigned req, Addr buf)=0
Abstract method, invoked when the user program calls ioctl() on the file descriptor returned by a pre...
gem5::EmulatedDriver::open
virtual int open(ThreadContext *tc, int mode, int flags)=0
Abstract method, invoked when the user program calls open() on the device driver.
gem5::EmulatedDriver::mmap
virtual Addr mmap(ThreadContext *tc, Addr start, uint64_t length, int prot, int tgtFlags, int tgtFd, off_t offset)
Virtual method, invoked when the user program calls mmap() on the file descriptor returned by a previ...
Definition emul_driver.hh:98
gem5::EmulationPageTable::initState
virtual void initState()
Definition page_table.hh:106
gem5::FutexMap
FutexMap class holds a map of all futexes used in the system.
Definition futex_map.hh:110
gem5::FutexMap::suspend_bitset
void suspend_bitset(Addr addr, uint64_t tgid, ThreadContext *tc, int bitmask)
Definition futex_map.cc:89
gem5::FutexMap::requeue
int requeue(Addr addr1, uint64_t tgid, int count, int count2, Addr addr2)
This operation wakes a given number (val) of waiters.
Definition futex_map.cc:141
gem5::FutexMap::suspend
void suspend(Addr addr, uint64_t tgid, ThreadContext *tc)
Inserts a futex into the map with one waiting TC.
Definition futex_map.cc:53
gem5::FutexMap::wakeup
int wakeup(Addr addr, uint64_t tgid, int count)
Wakes up at most count waiting threads on a futex.
Definition futex_map.cc:59
gem5::FutexMap::wakeup_bitset
int wakeup_bitset(Addr addr, uint64_t tgid, int bitmask)
Definition futex_map.cc:108
gem5::PCStateBase::instAddr
Addr instAddr() const
Returns the memory address of the instruction this PC points to.
Definition pcstate.hh:108
gem5::PortProxy
This object is a proxy for a port or other object which implements the functional response protocol,...
Definition port_proxy.hh:87
gem5::PortProxy::readBlob
void readBlob(Addr addr, void *p, uint64_t size) const
Higher level interfaces based on the above.
Definition port_proxy.hh:182
gem5::PortProxy::writeBlob
void writeBlob(Addr addr, const void *p, uint64_t size) const
Same as tryWriteBlob, but insists on success.
Definition port_proxy.hh:192
gem5::PortProxy::tryReadString
bool tryReadString(std::string &str, Addr addr) const
Reads the string at guest address addr into the std::string str.
Definition port_proxy.cc:115
gem5::Process::init
void init() override
init() is called after all C++ SimObjects have been created and all ports are connected.
Definition process.cc:278
gem5::Process::pid
uint64_t pid()
Definition process.hh:86
gem5::Process::fds
std::shared_ptr< FDArray > fds
Definition process.hh:286
gem5::Process::assignThreadContext
void assignThreadContext(ContextID context_id)
Definition process.hh:130
gem5::Process::useForClone
bool useForClone
Definition process.hh:182
gem5::Process::sigchld
bool * sigchld
Definition process.hh:298
gem5::Process::checkPathRedirect
std::string checkPathRedirect(const std::string &filename)
Redirect file path if it matches any keys initialized by system object.
Definition process.cc:424
gem5::Process::initState
void initState() override
initState() is called on each SimObject when not restoring from a checkpoint.
Definition process.cc:288
gem5::Process::tgid
uint64_t tgid()
Definition process.hh:90
gem5::Process::revokeThreadContext
void revokeThreadContext(int context_id)
After delegating a thread context to a child process no longer should relate to the ThreadContext.
Definition process.cc:265
gem5::Process::pTable
EmulationPageTable * pTable
Definition process.hh:184
gem5::Process::childClearTID
uint64_t childClearTID
Calls a futex wakeup at the address specified by this pointer when this process exits.
Definition process.hh:295
gem5::Random::RandomPtr
std::shared_ptr< Random > RandomPtr
Definition random.hh:65
gem5::Random::genRandom
static RandomPtr genRandom()
Definition random.hh:68
gem5::SyscallDesc
This class provides the wrapper interface for the system call implementations which are defined in th...
Definition syscall_desc.hh:70
gem5::SyscallDesc::name
std::string name() const
Definition syscall_desc.hh:80
gem5::SyscallDesc::returnInto
virtual void returnInto(ThreadContext *tc, const SyscallReturn &ret)=0
For use within the system call executor if new threads are created and need something returned into t...
gem5::SyscallReturn
This class represents the return value from an emulated system call, including any errno setting.
Definition syscall_return.hh:56
gem5::SyscallReturn::retry
static SyscallReturn retry()
Pseudo-constructor to create an instance with the retry flag set.
Definition syscall_return.hh:80
gem5::System::Threads::size
int size() const
Definition system.hh:210
gem5::System::Threads::findFree
ThreadContext * findFree()
Definition system.cc:121
gem5::System::maxPID
static const int maxPID
Definition system.hh:600
gem5::System::signalList
std::list< BasicSignal > signalList
Definition system.hh:607
gem5::System::futexMap
FutexMap futexMap
Definition system.hh:598
gem5::System::threads
Threads threads
Definition system.hh:310
gem5::ThreadContext
ThreadContext is the external interface to all thread state for anything outside of the CPU.
Definition thread_context.hh:89
gem5::ThreadContext::activate
virtual void activate()=0
Set the status to Active.
gem5::ThreadContext::getSystemPtr
virtual System * getSystemPtr()=0
gem5::ThreadContext::clearArchRegs
virtual void clearArchRegs()=0
gem5::ThreadContext::setProcessPtr
virtual void setProcessPtr(Process *p)=0
gem5::ThreadContext::Suspended
@ Suspended
Temporarily inactive.
Definition thread_context.hh:107
gem5::ThreadContext::pcState
virtual const PCStateBase & pcState() const =0
gem5::ThreadContext::threadId
virtual int threadId() const =0
gem5::ThreadContext::status
virtual Status status() const =0
gem5::ThreadContext::getProcessPtr
virtual Process * getProcessPtr()=0
gem5::ThreadContext::contextId
virtual ContextID contextId() const =0
gem5::ThreadContext::suspend
virtual void suspend()=0
Set the status to Suspended.
gem5::ThreadContext::setUseForClone
void setUseForClone(bool new_val)
Definition thread_context.hh:97
gem5::ThreadContext::cpuId
virtual int cpuId() const =0
gem5::TypedBufferArg
TypedBufferArg is a class template; instances of this template represent typed buffers in target user...
Definition syscall_emul_buf.hh:133
gem5::guest_abi::VarArgs
Definition varargs.hh:150
gem5::guest_abi::VarArgs::get
Arg get()
Definition varargs.hh:164
gem5::loader::SymbolTable::insert
bool insert(const Symbol &symbol)
Insert a new symbol in the table if it does not already exist.
Definition symtab.cc:66
std::list
STL list class.
Definition stl.hh:51
std::vector
STL vector class.
Definition stl.hh:37
thread_context.hh
emul_driver.hh
futex_map.hh
gem5::roundUp
static constexpr T roundUp(const T &val, const U &align)
This function is used to align addresses in memory.
Definition intmath.hh:260
fatal
#define fatal(...)
This implements a cprintf based fatal() function.
Definition logging.hh:200
guest_abi.hh
flags
uint8_t flags
Definition helpers.cc:87
warn
#define warn(...)
Definition logging.hh:256
warn_once
#define warn_once(...)
Definition logging.hh:260
warn_if
#define warn_if(cond,...)
Conditional warning macro that checks the supplied condition and only prints a warning if the conditi...
Definition logging.hh:283
gem5::ArmISA::sa
Bitfield< 3 > sa
Definition misc_types.hh:476
gem5::ArmISA::fd
Bitfield< 14, 12 > fd
Definition types.hh:150
gem5::ArmISA::n
Bitfield< 31 > n
Definition misc_types.hh:541
gem5::ArmISA::mask
Bitfield< 3, 0 > mask
Definition pcstate.hh:63
gem5::ArmISA::len
Bitfield< 18, 16 > len
Definition misc_types.hh:530
gem5::ArmISA::mode
Bitfield< 4, 0 > mode
Definition misc_types.hh:74
gem5::ArmISA::t
Bitfield< 5 > t
Definition misc_types.hh:71
gem5::ArmISA::b
Bitfield< 7 > b
Definition misc_types.hh:468
gem5::ArmISA::i
Bitfield< 7 > i
Definition misc_types.hh:67
gem5::ArmISA::offset
Bitfield< 23, 0 > offset
Definition types.hh:144
gem5::ArmISA::domain
Bitfield< 7, 4 > domain
Definition misc_types.hh:509
gem5::ArmISA::status
Bitfield< 5, 0 > status
Definition misc_types.hh:508
gem5::MipsISA::index
Bitfield< 30, 0 > index
Definition pra_constants.hh:47
gem5::MipsISA::p
Bitfield< 0 > p
Definition pra_constants.hh:326
gem5::PowerISA::bo
Bitfield< 25, 21 > bo
Definition types.hh:82
gem5::X86ISA::op
Bitfield< 4 > op
Definition types.hh:83
gem5::X86ISA::val
Bitfield< 63 > val
Definition misc.hh:804
gem5::X86ISA::level
Bitfield< 20 > level
Definition intmessage.hh:51
gem5::X86ISA::addr
Bitfield< 3 > addr
Definition types.hh:84
gem5::X86ISA::prot
Bitfield< 7 > prot
Definition misc.hh:597
gem5::loader::debugSymbolTable
SymbolTable debugSymbolTable
Global unified debugging symbol table (for target).
Definition symtab.cc:55
gem5::loader::createObjectFile
ObjectFile * createObjectFile(const std::string &fname, bool raw)
Definition object_file.cc:134
gem5::sim_clock::as_int::s
Tick s
second
Definition core.cc:65
gem5::sim_clock::as_int::ns
Tick ns
nanosecond
Definition core.cc:68
gem5::sim_clock::as_int::us
Tick us
microsecond
Definition core.cc:67
gem5
Copyright (c) 2024 Arm Limited All rights reserved.
Definition binary32.hh:36
gem5::linkFunc
SyscallReturn linkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr<> new_pathname)
Target link() handler.
Definition syscall_emul.cc:368
gem5::getppidFunc
SyscallReturn getppidFunc(SyscallDesc *desc, ThreadContext *tc)
Target getppid() handler.
Definition syscall_emul.cc:836
gem5::exitGroupFunc
SyscallReturn exitGroupFunc(SyscallDesc *desc, ThreadContext *tc, int status)
Target exit_group() handler: terminate simulation. (exit all threads)
Definition syscall_emul.cc:257
gem5::gettidFunc
SyscallReturn gettidFunc(SyscallDesc *desc, ThreadContext *tc)
Target gettid() handler.
Definition syscall_emul.cc:829
gem5::getrandomFunc
SyscallReturn getrandomFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> buf_ptr, typename OS::size_t count, unsigned int flags)
Definition syscall_emul.hh:3217
gem5::recvmsgFunc
SyscallReturn recvmsgFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> msgPtr, int flags)
Definition syscall_emul.cc:1117
gem5::fstat64Func
SyscallReturn fstat64Func(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr< typename OS::tgt_stat64 > tgt_stat)
Target fstat64() handler.
Definition syscall_emul.hh:1605
gem5::wait4Func
SyscallReturn wait4Func(SyscallDesc *desc, ThreadContext *tc, pid_t pid, VPtr<> statPtr, int options, VPtr<> rusagePtr)
Definition syscall_emul.hh:2860
gem5::clock_gettimeFunc
SyscallReturn clock_gettimeFunc(SyscallDesc *desc, ThreadContext *tc, int clk_id, VPtr< typename OS::timespec > tp)
Target clock_gettime() function.
Definition syscall_emul.hh:2265
gem5::warnUnsupportedOS
void warnUnsupportedOS(std::string syscall_name)
Definition syscall_emul.cc:71
gem5::brkFunc
SyscallReturn brkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> new_brk)
Target brk() handler: set brk address.
Definition syscall_emul.cc:270
gem5::mmapFunc
SyscallReturn mmapFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> start, typename OS::size_t length, int prot, int tgt_flags, int tgt_fd, typename OS::off_t offset)
Target mmap() handler.
Definition syscall_emul.hh:1995
gem5::pipe2Func
SyscallReturn pipe2Func(SyscallDesc *desc, ThreadContext *tc, VPtr<> tgt_addr, int flags)
Target pipe() handler.
Definition syscall_emul.cc:696
gem5::getpidFunc
SyscallReturn getpidFunc(SyscallDesc *desc, ThreadContext *tc)
Target getpid() handler.
Definition syscall_emul.cc:822
gem5::startswith
bool startswith(const char *s, const char *prefix)
Return true if 's' starts with the prefix string 'prefix'.
Definition str.hh:230
gem5::chdirFunc
SyscallReturn chdirFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname)
Target chdir() handler.
Definition syscall_emul.cc:916
gem5::fstatFunc
SyscallReturn fstatFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr< typename OS::tgt_stat > tgt_stat)
Target fstat() handler.
Definition syscall_emul.hh:1692
gem5::hst_stat
struct stat hst_stat
Definition syscall_emul.hh:554
gem5::truncate64Func
SyscallReturn truncate64Func(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, int64_t length)
Target truncate64() handler.
Definition syscall_emul.cc:461
gem5::getuidFunc
SyscallReturn getuidFunc(SyscallDesc *desc, ThreadContext *tc)
Definition syscall_emul.cc:843
gem5::pwrite64Func
SyscallReturn pwrite64Func(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> bufPtr, typename OS::size_t nbytes, typename OS::off_t offset)
Definition syscall_emul.hh:2159
gem5::getrusageFunc
SyscallReturn getrusageFunc(SyscallDesc *desc, ThreadContext *tc, int who, VPtr< typename OS::rusage > rup)
Target getrusage() function.
Definition syscall_emul.hh:2447
gem5::cloneFunc
SyscallReturn cloneFunc(SyscallDesc *desc, ThreadContext *tc, RegVal flags, RegVal newStack, VPtr<> ptidPtr, VPtr<> ctidPtr, VPtr<> tlsPtr)
Definition syscall_emul.hh:1880
gem5::pipePseudoFunc
SyscallReturn pipePseudoFunc(SyscallDesc *desc, ThreadContext *tc)
Pseudo Funcs - These functions use a different return convension, returning a second value in a regis...
Definition syscall_emul.cc:684
gem5::recvfromFunc
SyscallReturn recvfromFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, typename OS::size_t buf_len, int flags, VPtr<> addr_ptr, VPtr<> addrlen_ptr)
Definition syscall_emul.hh:3037
gem5::selectFunc
SyscallReturn selectFunc(SyscallDesc *desc, ThreadContext *tc, int nfds, VPtr< typename OS::fd_set > readfds, VPtr< typename OS::fd_set > writefds, VPtr< typename OS::fd_set > errorfds, VPtr< typename OS::timeval > timeout)
Definition syscall_emul.hh:2614
gem5::utimesFunc
SyscallReturn utimesFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::timeval[2]> tp)
Target utimes() handler.
Definition syscall_emul.hh:2339
gem5::socketFunc
SyscallReturn socketFunc(SyscallDesc *desc, ThreadContext *tc, int domain, int type, int prot)
Definition syscall_emul.hh:2574
gem5::chownFunc
SyscallReturn chownFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, uint32_t owner, uint32_t group)
Target chown() handler.
Definition syscall_emul.cc:512
gem5::statFunc
SyscallReturn statFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::tgt_stat > tgt_stat)
Target stat() handler.
Definition syscall_emul.hh:1455
gem5::copyOutStatBuf
void copyOutStatBuf(TgtStatPtr tgt, HostStatPtr host, bool fakeTTY=false)
Definition syscall_emul.hh:564
gem5::renameImpl
SyscallReturn renameImpl(SyscallDesc *desc, ThreadContext *tc, std::string old_name, std::string new_name)
Definition syscall_emul.cc:446
gem5::_llseekFunc
SyscallReturn _llseekFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, uint32_t offset_high, uint32_t offset_low, VPtr<> result_ptr, int whence)
Target _llseek() handler.
Definition syscall_emul.cc:309
gem5::writeFunc
SyscallReturn writeFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, typename OS::size_t nbytes)
Definition syscall_emul.hh:2821
gem5::writevFunc
SyscallReturn writevFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> tiov_base, typename OS::size_t count)
Target writev() handler.
Definition syscall_emul.hh:1960
gem5::doClone
SyscallReturn doClone(SyscallDesc *desc, ThreadContext *tc, RegVal flags, RegVal newStack, VPtr<> ptidPtr, VPtr<> ctidPtr, VPtr<> tlsPtr)
Definition syscall_emul.hh:1747
gem5::chmodFunc
SyscallReturn chmodFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, mode_t mode)
Target chmod() handler.
Definition syscall_emul.hh:1271
gem5::mknodImpl
SyscallReturn mknodImpl(SyscallDesc *desc, ThreadContext *tc, std::string path, mode_t mode, dev_t dev)
Definition syscall_emul.cc:905
gem5::renameFunc
SyscallReturn renameFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> oldpath, VPtr<> newpath)
Target rename() handler.
Definition syscall_emul.cc:430
gem5::mknodFunc
SyscallReturn mknodFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, mode_t mode, dev_t dev)
Target mknod() handler.
Definition syscall_emul.cc:894
gem5::curTick
Tick curTick()
The universal simulation clock.
Definition cur_tick.hh:46
gem5::setpgidFunc
SyscallReturn setpgidFunc(SyscallDesc *desc, ThreadContext *tc, int pid, int pgid)
Target setpgid() handler.
Definition syscall_emul.cc:788
gem5::truncateFunc
SyscallReturn truncateFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, typename OS::off_t length)
Target truncate() handler.
Definition syscall_emul.hh:3182
gem5::geteuidFunc
SyscallReturn geteuidFunc(SyscallDesc *desc, ThreadContext *tc)
Target geteuid() handler.
Definition syscall_emul.cc:850
gem5::symlinkFunc
SyscallReturn symlinkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr<> new_pathname)
Target symlink() handler.
Definition syscall_emul.cc:389
gem5::atSyscallPath
SyscallReturn atSyscallPath(ThreadContext *tc, int dirfd, std::string &path)
Definition syscall_emul.hh:352
gem5::unlinkFunc
SyscallReturn unlinkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname)
Target unlink() handler.
Definition syscall_emul.cc:348
gem5::lseekFunc
SyscallReturn lseekFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, typename OS::off_t offs, int whence)
Target lseek() handler.
Definition syscall_emul.hh:1006
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition types.hh:147
gem5::gtoh
T gtoh(T value, ByteOrder guest_byte_order)
Definition byteswap.hh:194
gem5::accessImpl
SyscallReturn accessImpl(SyscallDesc *desc, ThreadContext *tc, std::string path, mode_t mode)
Definition syscall_emul.cc:882
gem5::sysinfoFunc
SyscallReturn sysinfoFunc(SyscallDesc *desc, ThreadContext *tc, VPtr< typename OS::tgt_sysinfo > sysinfo)
Target sysinfo() handler.
Definition syscall_emul.hh:1224
gem5::fchownatFunc
SyscallReturn fchownatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, uint32_t owner, uint32_t group, int flags)
Target fchownat() handler.
Definition syscall_emul.hh:1169
gem5::chownImpl
SyscallReturn chownImpl(SyscallDesc *desc, ThreadContext *tc, std::string path, uint32_t owner, uint32_t group)
Definition syscall_emul.cc:523
gem5::gettimeofdayFunc
SyscallReturn gettimeofdayFunc(SyscallDesc *desc, ThreadContext *tc, VPtr< typename OS::timeval > tp, VPtr<> tz_ptr)
Target gettimeofday() handler.
Definition syscall_emul.hh:2292
gem5::unlinkatFunc
SyscallReturn unlinkatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, int flags)
Target unlinkat() handler.
Definition syscall_emul.hh:1024
gem5::pipeFunc
SyscallReturn pipeFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> tgt_addr)
Target pipe() handler.
Definition syscall_emul.cc:690
gem5::prlimitFunc
SyscallReturn prlimitFunc(SyscallDesc *desc, ThreadContext *tc, int pid, int resource, VPtr<> n, VPtr< typename OS::rlimit > rlp)
Definition syscall_emul.hh:2229
gem5::clock_getresFunc
SyscallReturn clock_getresFunc(SyscallDesc *desc, ThreadContext *tc, int clk_id, VPtr< typename OS::timespec > tp)
Target clock_getres() function.
Definition syscall_emul.hh:2279
gem5::copyOutStat64Buf
void copyOutStat64Buf(TgtStatPtr tgt, HostStatPtr host, bool fakeTTY=false)
Definition syscall_emul.hh:613
gem5::faccessatFunc
SyscallReturn faccessatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, int mode)
Target facessat() handler.
Definition syscall_emul.hh:1046
gem5::getsockoptFunc
SyscallReturn getsockoptFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int level, int optname, VPtr<> valPtr, VPtr<> lenPtr)
Definition syscall_emul.cc:1326
gem5::getrlimitFunc
SyscallReturn getrlimitFunc(SyscallDesc *desc, ThreadContext *tc, unsigned resource, VPtr< typename OS::rlimit > rlp)
Target getrlimit() handler.
Definition syscall_emul.hh:2193
gem5::mknodatFunc
SyscallReturn mknodatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, mode_t mode, dev_t dev)
Target mknodat() handler.
Definition syscall_emul.hh:1206
gem5::fallocateFunc
SyscallReturn fallocateFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int mode, typename OS::off_t offset, typename OS::off_t len)
Definition syscall_emul.hh:3157
gem5::fcntl64Func
SyscallReturn fcntl64Func(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int cmd)
Target fcntl64() handler.
Definition syscall_emul.cc:655
gem5::futimesatFunc
SyscallReturn futimesatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, VPtr< typename OS::timeval[2]> tp)
Target futimesat() handler.
Definition syscall_emul.hh:2306
gem5::ignoreWarnOnceFunc
SyscallReturn ignoreWarnOnceFunc(SyscallDesc *desc, ThreadContext *tc)
Like above, but only prints a warning once per syscall desc it's used with.
Definition syscall_emul.cc:91
gem5::socketpairFunc
SyscallReturn socketpairFunc(SyscallDesc *desc, ThreadContext *tc, int domain, int type, int prot, VPtr<> svPtr)
Definition syscall_emul.hh:2591
gem5::copyOutStatfsBuf
void copyOutStatfsBuf(TgtStatPtr tgt, HostStatPtr host)
Definition syscall_emul.hh:635
gem5::ftruncateFunc
SyscallReturn ftruncateFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, typename OS::off_t length)
Target ftruncate() handler.
Definition syscall_emul.hh:3201
gem5::statfsFunc
SyscallReturn statfsFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::tgt_statfs > tgt_stat)
Target statfs() handler.
Definition syscall_emul.hh:1718
gem5::setsockoptFunc
SyscallReturn setsockoptFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int level, int optname, VPtr<> valPtr, socklen_t len)
Definition syscall_emul.cc:1436
gem5::getpagesizeFunc
SyscallReturn getpagesizeFunc(SyscallDesc *desc, ThreadContext *tc)
Target getpagesize() handler.
Definition syscall_emul.cc:263
gem5::lstatFunc
SyscallReturn lstatFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::tgt_stat > tgt_stat)
Target lstat() handler.
Definition syscall_emul.hh:1635
gem5::rmdirFunc
SyscallReturn rmdirFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname)
Definition syscall_emul.cc:945
gem5::mkdirFunc
SyscallReturn mkdirFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, mode_t mode)
Target mkdir() handler.
Definition syscall_emul.cc:410
gem5::readlinkatFunc
SyscallReturn readlinkatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, VPtr<> buf_ptr, typename OS::size_t bufsiz)
Target readlinkat() handler.
Definition syscall_emul.hh:1064
gem5::getpgrpFunc
SyscallReturn getpgrpFunc(SyscallDesc *desc, ThreadContext *tc)
Target getpgrpFunc() handler.
Definition syscall_emul.cc:781
gem5::copyOutStatxBuf
void copyOutStatxBuf(TgtStatPtr tgt, HostStatPtr host, bool fakeTTY=false)
Definition syscall_emul.hh:675
gem5::eventfdFunc
SyscallReturn eventfdFunc(SyscallDesc *desc, ThreadContext *tc, unsigned initval, int in_flags)
Target eventfd() function.
Definition syscall_emul.hh:2985
gem5::unlinkImpl
SyscallReturn unlinkImpl(SyscallDesc *desc, ThreadContext *tc, std::string path)
Definition syscall_emul.cc:358
gem5::dupFunc
SyscallReturn dupFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd)
FIXME: The file description is not shared among file descriptors created with dup.
Definition syscall_emul.cc:565
gem5::listenFunc
SyscallReturn listenFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int backlog)
Definition syscall_emul.cc:1080
gem5::readvFunc
SyscallReturn readvFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> tiov_base, typename OS::size_t count)
Target readv() handler.
Definition syscall_emul.hh:1922
gem5::ftruncate64Func
SyscallReturn ftruncate64Func(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int64_t length)
Target ftruncate64() handler.
Definition syscall_emul.cc:482
gem5::getcwdFunc
SyscallReturn getcwdFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> buf_ptr, typename OS::size_t size)
Target getcwd() handler.
Definition syscall_emul.hh:974
gem5::fchmodatFunc
SyscallReturn fchmodatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, mode_t mode)
Target chmod() handler.
Definition syscall_emul.hh:1239
gem5::openatFunc
SyscallReturn openatFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_dirfd, VPtr<> pathname, int tgt_flags, int mode)
Target open() handler.
Definition syscall_emul.hh:814
gem5::fchownFunc
SyscallReturn fchownFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, uint32_t owner, uint32_t group)
Target fchown() handler.
Definition syscall_emul.cc:540
gem5::hst_statfs
struct statfs hst_statfs
Definition syscall_emul.hh:549
gem5::munmapFunc
SyscallReturn munmapFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> start, typename OS::size_t length)
Target munmap() handler.
Definition syscall_emul.hh:3135
gem5::readlinkFunc
SyscallReturn readlinkFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr<> buf_ptr, typename OS::size_t bufsiz)
Target readlink() handler.
Definition syscall_emul.hh:1130
gem5::pread64Func
SyscallReturn pread64Func(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> bufPtr, typename OS::size_t nbytes, typename OS::off_t offset)
Definition syscall_emul.hh:2137
gem5::setTidAddressFunc
SyscallReturn setTidAddressFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> tidPtr)
Target set_tid_address() handler.
Definition syscall_emul.cc:292
gem5::getElapsedTimeMicro
void getElapsedTimeMicro(T1 &sec, T2 &usec)
Helper function to convert current elapsed time to seconds and microseconds.
Definition syscall_emul.hh:520
gem5::seconds_since_epoch
const unsigned seconds_since_epoch
Approximate seconds since the epoch (1/1/1970).
Definition syscall_emul.hh:514
gem5::timesFunc
SyscallReturn timesFunc(SyscallDesc *desc, ThreadContext *tc, VPtr< typename OS::tms > bufp)
Target times() function.
Definition syscall_emul.hh:2494
gem5::fcntlFunc
SyscallReturn fcntlFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int cmd, guest_abi::VarArgs< int > varargs)
Target fcntl() handler.
Definition syscall_emul.cc:613
gem5::openFunc
SyscallReturn openFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, int tgt_flags, int mode)
Target open() handler.
Definition syscall_emul.hh:964
gem5::getElapsedTimeNano
void getElapsedTimeNano(T1 &sec, T2 &nsec)
Helper function to convert current elapsed time to seconds and nanoseconds.
Definition syscall_emul.hh:533
gem5::htog
T htog(T value, ByteOrder guest_byte_order)
Definition byteswap.hh:187
gem5::schedGetaffinityFunc
SyscallReturn schedGetaffinityFunc(SyscallDesc *desc, ThreadContext *tc, pid_t pid, typename OS::size_t cpusetsize, VPtr<> cpu_set_mask)
Target sched_getaffinity.
Definition syscall_emul.hh:3012
gem5::RegVal
uint64_t RegVal
Definition types.hh:173
gem5::bindFunc
SyscallReturn bindFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, int addrlen)
Definition syscall_emul.cc:1059
gem5::pollFunc
SyscallReturn pollFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> fdsPtr, int nfds, int tmout)
Definition syscall_emul.hh:1278
gem5::getegidFunc
SyscallReturn getegidFunc(SyscallDesc *desc, ThreadContext *tc)
Target getegid() handler.
Definition syscall_emul.cc:864
gem5::timeFunc
SyscallReturn timeFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> taddr)
Target time() function.
Definition syscall_emul.hh:2513
gem5::newfstatatFunc
SyscallReturn newfstatatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, VPtr< typename OS::tgt_stat64 > tgt_stat, int flags)
Target newfstatat() handler.
Definition syscall_emul.hh:1481
gem5::fchmodFunc
SyscallReturn fchmodFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, uint32_t mode)
Target fchmod() handler.
Definition syscall_emul.hh:1352
gem5::shutdownFunc
SyscallReturn shutdownFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, int how)
Target shutdown() handler.
Definition syscall_emul.cc:1044
gem5::renameatFunc
SyscallReturn renameatFunc(SyscallDesc *desc, ThreadContext *tc, int olddirfd, VPtr<> oldpath, int newdirfd, VPtr<> newpath)
Target renameat() handler.
Definition syscall_emul.hh:1141
gem5::getcpuFunc
SyscallReturn getcpuFunc(SyscallDesc *desc, ThreadContext *tc, VPtr< uint32_t > cpu, VPtr< uint32_t > node, VPtr< uint32_t > tcache)
Definition syscall_emul.cc:1457
gem5::getsocknameFunc
SyscallReturn getsocknameFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> addrPtr, VPtr<> lenPtr)
Definition syscall_emul.cc:1368
gem5::clone3Func
SyscallReturn clone3Func(SyscallDesc *desc, ThreadContext *tc, VPtr< typename OS::tgt_clone_args > cl_args, RegVal size)
Definition syscall_emul.hh:1864
gem5::mkdirImpl
SyscallReturn mkdirImpl(SyscallDesc *desc, ThreadContext *tc, std::string path, mode_t mode)
Definition syscall_emul.cc:420
gem5::ioctlFunc
SyscallReturn ioctlFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, unsigned req, VPtr<> addr)
Target ioctl() handler.
Definition syscall_emul.hh:739
gem5::getpeernameFunc
SyscallReturn getpeernameFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> sockAddrPtr, VPtr<> addrlenPtr)
Definition syscall_emul.cc:1407
gem5::unimplementedFunc
SyscallReturn unimplementedFunc(SyscallDesc *desc, ThreadContext *tc)
Handler for unimplemented syscalls that we haven't thought about.
Definition syscall_emul.cc:77
gem5::gethostnameFunc
SyscallReturn gethostnameFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> buf_ptr, int name_len)
Target gethostname() handler.
Definition syscall_emul.cc:338
gem5::accessFunc
SyscallReturn accessFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, mode_t mode)
Target access() handler.
Definition syscall_emul.cc:871
gem5::tgkillFunc
SyscallReturn tgkillFunc(SyscallDesc *desc, ThreadContext *tc, int tgid, int tid, int sig)
Definition syscall_emul.hh:2530
gem5::sendmsgFunc
SyscallReturn sendmsgFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> msgPtr, int flags)
Definition syscall_emul.cc:1257
gem5::cloneBackwardsFunc
SyscallReturn cloneBackwardsFunc(SyscallDesc *desc, ThreadContext *tc, RegVal flags, RegVal newStack, VPtr<> ptidPtr, VPtr<> tlsPtr, VPtr<> ctidPtr)
Definition syscall_emul.hh:1888
gem5::lstat64Func
SyscallReturn lstat64Func(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::tgt_stat64 > tgt_stat)
Target lstat64() handler.
Definition syscall_emul.hh:1661
gem5::fstatat64Func
SyscallReturn fstatat64Func(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, VPtr< typename OS::tgt_stat64 > tgt_stat)
Target fstatat64() handler.
Definition syscall_emul.hh:1520
gem5::ignoreFunc
SyscallReturn ignoreFunc(SyscallDesc *desc, ThreadContext *tc)
Handler for unimplemented syscalls that we never intend to implement (signal handling,...
Definition syscall_emul.cc:84
gem5::rmdirImpl
SyscallReturn rmdirImpl(SyscallDesc *desc, ThreadContext *tc, std::string path)
Definition syscall_emul.cc:955
gem5::acceptFunc
SyscallReturn acceptFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> addrPtr, VPtr<> lenPtr)
Definition syscall_emul.hh:2918
gem5::futexFunc
SyscallReturn futexFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> uaddr, int op, int val, int timeout, VPtr<> uaddr2, int val3)
Futex system call Implemented by Daniel Sanchez Used by printf's in multi-threaded apps.
Definition syscall_emul.hh:377
gem5::fstatfsFunc
SyscallReturn fstatfsFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr< typename OS::tgt_statfs > tgt_stat)
Target fstatfs() handler.
Definition syscall_emul.hh:1898
gem5::statxFunc
SyscallReturn statxFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, int flags, unsigned int mask, VPtr< typename OS::tgt_statx > tgt_statx)
Target statx() handler.
Definition syscall_emul.hh:1566
gem5::mremapFunc
SyscallReturn mremapFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> start, typename OS::size_t old_length, typename OS::size_t new_length, int flags, guest_abi::VarArgs< uint64_t > varargs)
Target mremap() handler.
Definition syscall_emul.hh:1371
gem5::stat64Func
SyscallReturn stat64Func(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr< typename OS::tgt_stat64 > tgt_stat)
Target stat64() handler.
Definition syscall_emul.hh:1557
gem5::hst_stat64
struct stat64 hst_stat64
Definition syscall_emul.hh:555
gem5::connectFunc
SyscallReturn connectFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, int addrlen)
Definition syscall_emul.cc:1095
gem5::execveFunc
SyscallReturn execveFunc(SyscallDesc *desc, ThreadContext *tc, VPtr<> pathname, VPtr<> argv_mem_loc, VPtr<> envp_mem_loc)
Definition syscall_emul.hh:2347
gem5::exitFunc
SyscallReturn exitFunc(SyscallDesc *desc, ThreadContext *tc, int status)
Target exit() handler: terminate current context.
Definition syscall_emul.cc:251
gem5::dup2Func
SyscallReturn dup2Func(SyscallDesc *desc, ThreadContext *tc, int old_tgt_fd, int new_tgt_fd)
Target dup2() handler.
Definition syscall_emul.cc:585
gem5::getgidFunc
SyscallReturn getgidFunc(SyscallDesc *desc, ThreadContext *tc)
Target getgid() handler.
Definition syscall_emul.cc:857
gem5::readFunc
SyscallReturn readFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, typename OS::size_t nbytes)
Definition syscall_emul.hh:2793
gem5::closeFunc
SyscallReturn closeFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd)
Target close() handler.
Definition syscall_emul.cc:301
gem5::umaskFunc
SyscallReturn umaskFunc(SyscallDesc *desc, ThreadContext *tc)
Target umask() handler.
Definition syscall_emul.cc:501
gem5::mmap2Func
SyscallReturn mmap2Func(SyscallDesc *desc, ThreadContext *tc, VPtr<> start, typename OS::size_t length, int prot, int tgt_flags, int tgt_fd, typename OS::off_t offset)
Target mmap2() handler.
Definition syscall_emul.hh:2181
gem5::sendtoFunc
SyscallReturn sendtoFunc(SyscallDesc *desc, ThreadContext *tc, int tgt_fd, VPtr<> buf_ptr, typename OS::size_t buf_len, int flags, VPtr<> addr_ptr, socklen_t addr_len)
Definition syscall_emul.hh:3101
gem5::mkdiratFunc
SyscallReturn mkdiratFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd, VPtr<> pathname, mode_t mode)
Target mkdirat() handler.
Definition syscall_emul.hh:1188
object_file.hh
page_table.hh
Declarations of a non-full system Page Table.
proxy_ptr.hh
se_translating_port_proxy.hh
syscall_debug_macros.hh
DPRINTF_SYSCALL
#define DPRINTF_SYSCALL(FLAGEXT, FMT,...)
This macro is intended to help with readability.
Definition syscall_debug_macros.hh:57
syscall_desc.hh
syscall_emul_buf.hh
This file defines buffer classes used to handle pointer arguments in emulated syscalls.
syscall_return.hh
Generated on Mon Jan 13 2025 04:28:42 for gem5 by doxygen 1.9.8