2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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accept.2, bind.2, connect.2, getpeername.2, getpriority.2, getsockname.2, getsockopt.2, ioctl.2, killpg.2, listen.2, lseek.2, readlink.2, recv.2, send.2, setpgid.2, setreuid.2, shutdown.2, socket.2, socketpair.2, syscall.2, truncate.2, alloca.3, btree.3, daemon.3, dbopen.3, err.3, exec.3, fclose.3, ferror.3, fflush.3, fopen.3, fread.3, fseek.3, fts.3, hash.3, mpool.3, popen.3, queue.3, rcmd.3, recno.3, rexec.3, scanf.3, setbuf.3, stdarg.3, stdio.3, strtod.3, hostname.7, mdoc.7, mdoc.samples.7: srcfix: LICENSE: s/BSD_4_CLAUSE_FULL/BSD_4_CLAUSE_UCB/
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 16:41:19 +00:00
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.\" %%%LICENSE_START(BSD_4_CLAUSE_UCB)
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2004-11-03 13:51:07 +00:00
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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accept.2, bind.2, connect.2, getpeername.2, getpriority.2, getsockname.2, getsockopt.2, ioctl.2, killpg.2, listen.2, lseek.2, readlink.2, recv.2, send.2, setpgid.2, setreuid.2, shutdown.2, socket.2, socketpair.2, syscall.2, truncate.2, alloca.3, btree.3, daemon.3, dbopen.3, err.3, exec.3, fclose.3, ferror.3, fflush.3, fopen.3, fread.3, fseek.3, fts.3, getloadavg.3, hash.3, mpool.3, openpty.3, popen.3, queue.3, rcmd.3, recno.3, rexec.3, scanf.3, setbuf.3, stdarg.3, stdio.3, strtod.3, hostname.7, mdoc.7, mdoc.samples.7, operator.7, symlink.7: Add LICENSE_START(BSD_[34]_CLAUSE_FULL)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:28:48 +00:00
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.\" %%%LICENSE_END
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2004-11-03 13:51:07 +00:00
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.\"
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.\" @(#)syscall.2 8.1 (Berkeley) 6/16/93
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.\"
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.\"
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.\" 2002-03-20 Christoph Hellwig <hch@infradead.org>
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.\" - adopted for Linux
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2015-01-18 07:22:04 +00:00
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.\" 2015-01-17, Kees Cook <keescook@chromium.org>
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.\" Added mips and arm64.
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2004-11-03 13:51:07 +00:00
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.\"
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getent.1, ldd.1, locale.1, localedef.1, memusage.1, memusagestat.1, mtrace.1, _exit.2, _syscall.2, accept.2, access.2, acct.2, add_key.2, adjtimex.2, alloc_hugepages.2, arch_prctl.2, bdflush.2, bind.2, bpf.2, brk.2, cacheflush.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, close_range.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fanotify_init.2, fanotify_mark.2, fcntl.2, flock.2, fork.2, fsync.2, futex.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpid.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, getxattr.2, idle.2, init_module.2, inotify_add_watch.2, inotify_rm_watch.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl.2, ioctl_console.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_fslabel.2, ioctl_getfsmap.2, ioctl_ns.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ipc.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open.2, open_by_handle_at.2, openat2.2, pause.2, pciconfig_read.2, perf_event_open.2, perfmonctl.2, personality.2, pidfd_getfd.2, pidfd_open.2, pidfd_send_signal.2, pipe.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readlink.2, readv.2, reboot.2, recv.2, remap_file_pages.2, removexattr.2, rename.2, request_key.2, restart_syscall.2, rmdir.2, rt_sigqueueinfo.2, s390_guarded_storage.2, s390_pci_mmio_write.2, s390_runtime_instr.2, s390_sthyi.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, set_thread_area.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, setup.2, setxattr.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, shutdown.2, sigaction.2, sigaltstack.2, signal.2, signalfd.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, stime.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscall.2, syscalls.2, sysctl.2, sysfs.2, sysinfo.2, syslog.2, time.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, uname.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vfork.2, vhangup.2, vm86.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, __ppc_get_timebase.3, __ppc_set_ppr_med.3, __ppc_yield.3, __setfpucw.3, a64l.3, abort.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, aio_cancel.3, aio_error.3, aio_fsync.3, aio_read.3, aio_return.3, aio_suspend.3, aio_write.3, alloca.3, argz_add.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, atof.3, atoi.3, backtrace.3, basename.3, bcmp.3, bcopy.3, bindresvport.3, bsd_signal.3, bsearch.3, bstring.3, btowc.3, byteorder.3, bzero.3, cabs.3, cacos.3, cacosh.3, canonicalize_file_name.3, carg.3, casin.3, casinh.3, catan.3, catanh.3, catgets.3, catopen.3, cbrt.3, ccos.3, ccosh.3, ceil.3, cexp.3, cexp2.3, cfree.3, cimag.3, circleq.3, clearenv.3, clock.3, clock_getcpuclockid.3, clog.3, clog10.3, clog2.3, closedir.3, cmsg.3, confstr.3, conj.3, copysign.3, cos.3, cosh.3, cpow.3, cproj.3, creal.3, crypt.3, csin.3, csinh.3, csqrt.3, ctan.3, ctanh.3, ctermid.3, ctime.3, daemon.3, des_crypt.3, difftime.3, dirfd.3, div.3, dl_iterate_phdr.3, dladdr.3, dlerror.3, dlinfo.3, dlopen.3, dlsym.3, drand48.3, drand48_r.3, duplocale.3, dysize.3, ecvt.3, ecvt_r.3, encrypt.3, endian.3, envz_add.3, erf.3, erfc.3, err.3, errno.3, error.3, ether_aton.3, euidaccess.3, exec.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fclose.3, fcloseall.3, fdim.3, fenv.3, ferror.3, fexecve.3, fflush.3, ffs.3, fgetc.3, fgetgrent.3, fgetpwent.3, fgetwc.3, fgetws.3, fileno.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fmtmsg.3, fnmatch.3, fopen.3, fopencookie.3, fpathconf.3, fpclassify.3, fpurge.3, fputwc.3, fputws.3, fread.3, frexp.3, fseek.3, fseeko.3, ftime.3, ftok.3, fts.3, ftw.3, futimes.3, fwide.3, gamma.3, gcvt.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getentropy.3, getenv.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getifaddrs.3, getipnodebyname.3, getline.3, getloadavg.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent.3, getnetent_r.3, getopt.3, getpass.3, getprotoent.3, getprotoent_r.3, getpt.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getrpcent_r.3, getrpcport.3, gets.3, getservent.3, getservent_r.3, getspnam.3, getsubopt.3, getttyent.3, getumask.3, getusershell.3, getutent.3, getutmp.3, getw.3, getwchar.3, glob.3, gnu_get_libc_version.3, grantpt.3, group_member.3, gsignal.3, hsearch.3, hypot.3, iconv.3, iconv_close.3, iconv_open.3, if_nameindex.3, if_nametoindex.3, ilogb.3, index.3, inet.3, inet_net_pton.3, inet_ntop.3, inet_pton.3, initgroups.3, insque.3, isalpha.3, isatty.3, isfdtype.3, isgreater.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, j0.3, key_setsecret.3, killpg.3, ldexp.3, lgamma.3, lio_listio.3, list.3, localeconv.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, login.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, mallinfo.3, malloc.3, malloc_get_state.3, malloc_hook.3, malloc_info.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, mallopt.3, matherr.3, mblen.3, mbrlen.3, mbrtowc.3, mbsinit.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, mcheck.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, memfrob.3, memmem.3, memmove.3, mempcpy.3, memset.3, mkdtemp.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mpool.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mq_unlink.3, mtrace.3, nan.3, newlocale.3, nextafter.3, nextup.3, nl_langinfo.3, ntp_gettime.3, on_exit.3, open_memstream.3, opendir.3, openpty.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, posix_spawn.3, pow.3, pow10.3, printf.3, profil.3, psignal.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setsigmask_np.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_mutex_consistent.3, pthread_mutexattr_getpshared.3, pthread_mutexattr_setrobust.3, pthread_rwlockattr_setkind_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_spin_init.3, pthread_spin_lock.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, ptsname.3, putenv.3, putgrent.3, putpwent.3, puts.3, putwchar.3, qecvt.3, qsort.3, raise.3, rand.3, random.3, random_r.3, rcmd.3, re_comp.3, readdir.3, readdir_r.3, realpath.3, regex.3, remainder.3, remove.3, remquo.3, resolver.3, rewinddir.3, rexec.3, rint.3, round.3, rpc.3, rpmatch.3, rtime.3, rtnetlink.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, seekdir.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_post.3, sem_unlink.3, sem_wait.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, setlocale.3, setlogmask.3, setnetgrent.3, shm_open.3, siginterrupt.3, signbit.3, significand.3, sigpause.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sincos.3, sinh.3, sleep.3, slist.3, sockatmark.3, sqrt.3, stailq.3, statvfs.3, stdarg.3, stdio.3, stdio_ext.3, stpcpy.3, stpncpy.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfmon.3, strfromd.3, strfry.3, strftime.3, string.3, strlen.3, strnlen.3, strpbrk.3, strptime.3, strsep.3, strsignal.3, strspn.3, strstr.3, strtod.3, strtoimax.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, swab.3, sysconf.3, syslog.3, system.3, sysv_signal.3, tailq.3, tan.3, tanh.3, tcgetpgrp.3, tcgetsid.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpfile.3, tmpnam.3, toascii.3, toupper.3, towctrans.3, towlower.3, towupper.3, trunc.3, tsearch.3, ttyname.3, ttyslot.3, tzset.3, ualarm.3, ulimit.3, undocumented.3, ungetwc.3, unlocked_stdio.3, unlockpt.3, updwtmp.3, uselocale.3, usleep.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscasecmp.3, wcscat.3, wcschr.3, wcscmp.3, wcscpy.3, wcscspn.3, wcsdup.3, wcslen.3, wcsncasecmp.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcspbrk.3, wcsrchr.3, wcsrtombs.3, wcsspn.3, wcsstr.3, wcstoimax.3, wcstok.3, wcstombs.3, wcswidth.3, wctob.3, wctomb.3, wctrans.3, wctype.3, wcwidth.3, wmemchr.3, wmemcmp.3, wmemcpy.3, wmemmove.3, wmemset.3, wordexp.3, wprintf.3, xcrypt.3, xdr.3, y0.3, cciss.4, console_codes.4, dsp56k.4, hpsa.4, initrd.4, loop.4, lp.4, msr.4, random.4, rtc.4, smartpqi.4, veth.4, wavelan.4, acct.5, core.5, elf.5, hosts.5, locale.5, proc.5, resolv.conf.5, rpc.5, slabinfo.5, sysfs.5, tmpfs.5, utmp.5, address_families.7, aio.7, attributes.7, bootparam.7, capabilities.7, cgroups.7, complex.7, ddp.7, environ.7, epoll.7, fanotify.7, feature_test_macros.7, hier.7, inode.7, inotify.7, ip.7, ipv6.7, keyrings.7, locale.7, man-pages.7, man.7, math_error.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, numa.7, packet.7, pkeys.7, pthreads.7, queue.7, raw.7, rtnetlink.7, sched.7, session-keyring.7, shm_overview.7, sigevent.7, signal-safety.7, signal.7, sock_diag.7, socket.7, spufs.7, symlink.7, system_data_types.7, tcp.7, time_namespaces.7, udp.7, udplite.7, unicode.7, unix.7, uri.7, user_namespaces.7, vdso.7, vsock.7, x25.7, iconvconfig.8, ld.so.8, ldconfig.8, sln.8, tzselect.8: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2021-03-21 23:15:34 +00:00
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.TH SYSCALL 2 2021-03-22 "Linux" "Linux Programmer's Manual"
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2007-05-26 14:10:51 +00:00
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.SH NAME
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syscall \- indirect system call
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.SH SYNOPSIS
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.nf
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2021-06-12 08:31:29 +00:00
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.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
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2007-05-26 14:10:51 +00:00
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.B #include <unistd.h>
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_syscall.2, clock_getres.2, clone.2, copy_file_range.2, create_module.2, delete_module.2, fallocate.2, futex.2, get_kernel_syms.2, get_robust_list.2, getcpu.2, getdents.2, gettid.2, gettimeofday.2, getunwind.2, init_module.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_userfaultfd.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, link.2, llseek.2, memfd_create.2, mmap.2, mq_getsetattr.2, msgctl.2, msgget.2, open_by_handle_at.2, outb.2, perf_event_open.2, pivot_root.2, process_vm_readv.2, query_module.2, readdir.2, recvmmsg.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_setattr.2, seccomp.2, select.2, select_tut.2, send.2, sendmmsg.2, set_thread_area.2, set_tid_address.2, sgetmask.2, shmop.2, sigaction.2, sigprocmask.2, splice.2, spu_create.2, spu_run.2, statx.2, subpage_prot.2, sync_file_range.2, syscall.2, sysctl.2, sysfs.2, tee.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, tkill.2, uselib.2, utimensat.2, vmsplice.2, wait.2, aio_init.3, asinh.3, atan2.3, atanh.3, backtrace.3, basename.3, bswap.3, bzero.3, catgets.3, catopen.3, dladdr.3, dlsym.3, endian.3, envz_add.3, erf.3, erfc.3, error.3, ferror.3, ffs.3, fgetc.3, fmemopen.3, fopen.3, fopencookie.3, fseek.3, ftw.3, futimes.3, getdate.3, getenv.3, getline.3, getlogin.3, getrpcent.3, getsubopt.3, getutmp.3, getw.3, gnu_get_libc_version.3, inet_net_pton.3, isalpha.3, lio_listio.3, makedev.3, malloc_get_state.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, matherr.3, memchr.3, nextup.3, ntp_gettime.3, posix_madvise.3, program_invocation_name.3, pthread_atfork.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cleanup_push_defer_np.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_rwlockattr_setkind_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedprio.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, puts.3, random.3, random_r.3, rpc.3, sched_getcpu.3, setnetgrent.3, sigwait.3, stdin.3, strerror.3, strfmon.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, ttyname.3, uselocale.3, xdr.3, dsp56k.4, sigevent.7, vdso.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-15 17:26:11 +00:00
|
|
|
.PP
|
2014-04-30 19:42:42 +00:00
|
|
|
.BI "long syscall(long " number ", ...);"
|
2007-05-26 14:10:51 +00:00
|
|
|
.fi
|
2020-01-09 15:46:26 +00:00
|
|
|
.PP
|
_exit.2, access.2, acct.2, brk.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, fsync.2, futimesat.2, getdomainname.2, getgroups.2, gethostname.2, getpagesize.2, getrlimit.2, getsid.2, gettimeofday.2, kill.2, link.2, madvise.2, mincore.2, mkdir.2, mknod.2, nanosleep.2, nice.2, open.2, posix_fadvise.2, pread.2, process_vm_readv.2, readlink.2, readv.2, rename.2, select.2, semop.2, seteuid.2, setpgid.2, setreuid.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigsuspend.2, sigwaitinfo.2, stat.2, stime.2, symlink.2, sync.2, syscall.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, truncate.2, unlink.2, utimensat.2, vfork.2, vhangup.2, wait.2, wait4.2, a64l.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, asin.3, asinh.3, atan.3, atan2.3, atanh.3, atoi.3, bsd_signal.3, cbrt.3, ceil.3, cfree.3, clearenv.3, clock_getcpuclockid.3, confstr.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, daemon.3, dirfd.3, div.3, drand48.3, drand48_r.3, duplocale.3, dysize.3, ecvt.3, ecvt_r.3, endian.3, erf.3, erfc.3, exec.3, exp.3, exp2.3, expm1.3, fabs.3, fdim.3, ferror.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fopen.3, fpclassify.3, frexp.3, fseeko.3, ftw.3, futimes.3, fwide.3, gamma.3, gcvt.3, getaddrinfo.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getentropy.3, getenv.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getline.3, getloadavg.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent_r.3, getopt.3, getpass.3, getprotoent_r.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent_r.3, getservent_r.3, getspnam.3, getsubopt.3, getusershell.3, getw.3, grantpt.3, group_member.3, gsignal.3, hypot.3, ilogb.3, inet.3, inet_net_pton.3, initgroups.3, insque.3, isalpha.3, isfdtype.3, isgreater.3, iswblank.3, j0.3, killpg.3, ldexp.3, lgamma.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, malloc.3, mbsnrtowcs.3, memchr.3, mkdtemp.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mq_receive.3, mq_send.3, nan.3, newlocale.3, nextafter.3, nl_langinfo.3, on_exit.3, open_memstream.3, opendir.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, pow.3, printf.3, profil.3, psignal.3, pthread_attr_setstack.3, pthread_cleanup_push_defer_np.3, pthread_kill.3, pthread_mutex_consistent.3, pthread_mutexattr_setrobust.3, pthread_rwlockattr_setkind_np.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_spin_init.3, pthread_spin_lock.3, ptsname.3, putenv.3, putpwent.3, qecvt.3, qsort.3, rand.3, random.3, random_r.3, rcmd.3, readdir_r.3, realpath.3, remainder.3, remquo.3, rint.3, round.3, rpmatch.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, seekdir.3, sem_wait.3, setbuf.3, setenv.3, setjmp.3, setnetgrent.3, siginterrupt.3, signbit.3, significand.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sockatmark.3, sqrt.3, stpcpy.3, stpncpy.3, strdup.3, strerror.3, strfromd.3, strnlen.3, strsep.3, strsignal.3, strtod.3, strtok.3, strtol.3, strtoul.3, syslog.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpnam.3, toascii.3, toupper.3, towlower.3, towupper.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, unlocked_stdio.3, unlockpt.3, uselocale.3, usleep.3, wcpcpy.3, wcpncpy.3, wcscasecmp.3, wcsdup.3, wcsncasecmp.3, wcsnlen.3, wcsnrtombs.3, wordexp.3, wprintf.3, y0.3: srcfix: use better macros in SYNOPSIS
Around the text:
"Feature Test Macro Requirements for glibc..."
replace ".in -4n/.in" with ".RS -4/.RE".
The latter form is more idiomatic use of man macros.
The nroff output is unchanged.
Reported-by: G. Branden Robinson <g.branden.robinson@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-09-29 13:06:31 +00:00
|
|
|
.RS -4
|
2020-01-09 15:46:26 +00:00
|
|
|
Feature Test Macro Requirements for glibc (see
|
|
|
|
.BR feature_test_macros (7)):
|
_exit.2, access.2, acct.2, brk.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, fsync.2, futimesat.2, getdomainname.2, getgroups.2, gethostname.2, getpagesize.2, getrlimit.2, getsid.2, gettimeofday.2, kill.2, link.2, madvise.2, mincore.2, mkdir.2, mknod.2, nanosleep.2, nice.2, open.2, posix_fadvise.2, pread.2, process_vm_readv.2, readlink.2, readv.2, rename.2, select.2, semop.2, seteuid.2, setpgid.2, setreuid.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigsuspend.2, sigwaitinfo.2, stat.2, stime.2, symlink.2, sync.2, syscall.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, truncate.2, unlink.2, utimensat.2, vfork.2, vhangup.2, wait.2, wait4.2, a64l.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, asin.3, asinh.3, atan.3, atan2.3, atanh.3, atoi.3, bsd_signal.3, cbrt.3, ceil.3, cfree.3, clearenv.3, clock_getcpuclockid.3, confstr.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, daemon.3, dirfd.3, div.3, drand48.3, drand48_r.3, duplocale.3, dysize.3, ecvt.3, ecvt_r.3, endian.3, erf.3, erfc.3, exec.3, exp.3, exp2.3, expm1.3, fabs.3, fdim.3, ferror.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fopen.3, fpclassify.3, frexp.3, fseeko.3, ftw.3, futimes.3, fwide.3, gamma.3, gcvt.3, getaddrinfo.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getentropy.3, getenv.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getline.3, getloadavg.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent_r.3, getopt.3, getpass.3, getprotoent_r.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent_r.3, getservent_r.3, getspnam.3, getsubopt.3, getusershell.3, getw.3, grantpt.3, group_member.3, gsignal.3, hypot.3, ilogb.3, inet.3, inet_net_pton.3, initgroups.3, insque.3, isalpha.3, isfdtype.3, isgreater.3, iswblank.3, j0.3, killpg.3, ldexp.3, lgamma.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, malloc.3, mbsnrtowcs.3, memchr.3, mkdtemp.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mq_receive.3, mq_send.3, nan.3, newlocale.3, nextafter.3, nl_langinfo.3, on_exit.3, open_memstream.3, opendir.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, pow.3, printf.3, profil.3, psignal.3, pthread_attr_setstack.3, pthread_cleanup_push_defer_np.3, pthread_kill.3, pthread_mutex_consistent.3, pthread_mutexattr_setrobust.3, pthread_rwlockattr_setkind_np.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_spin_init.3, pthread_spin_lock.3, ptsname.3, putenv.3, putpwent.3, qecvt.3, qsort.3, rand.3, random.3, random_r.3, rcmd.3, readdir_r.3, realpath.3, remainder.3, remquo.3, rint.3, round.3, rpmatch.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, seekdir.3, sem_wait.3, setbuf.3, setenv.3, setjmp.3, setnetgrent.3, siginterrupt.3, signbit.3, significand.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sockatmark.3, sqrt.3, stpcpy.3, stpncpy.3, strdup.3, strerror.3, strfromd.3, strnlen.3, strsep.3, strsignal.3, strtod.3, strtok.3, strtol.3, strtoul.3, syslog.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpnam.3, toascii.3, toupper.3, towlower.3, towupper.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, unlocked_stdio.3, unlockpt.3, uselocale.3, usleep.3, wcpcpy.3, wcpncpy.3, wcscasecmp.3, wcsdup.3, wcsncasecmp.3, wcsnlen.3, wcsnrtombs.3, wordexp.3, wprintf.3, y0.3: srcfix: use better macros in SYNOPSIS
Around the text:
"Feature Test Macro Requirements for glibc..."
replace ".in -4n/.in" with ".RS -4/.RE".
The latter form is more idiomatic use of man macros.
The nroff output is unchanged.
Reported-by: G. Branden Robinson <g.branden.robinson@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-09-29 13:06:31 +00:00
|
|
|
.RE
|
2020-12-31 09:48:51 +00:00
|
|
|
.PP
|
2020-01-09 15:46:26 +00:00
|
|
|
.BR syscall ():
|
2021-01-04 22:18:08 +00:00
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.nf
|
|
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|
Since glibc 2.19:
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_DEFAULT_SOURCE
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Before glibc 2.19:
|
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|
_BSD_SOURCE || _SVID_SOURCE
|
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|
|
.fi
|
2007-05-26 14:10:51 +00:00
|
|
|
.SH DESCRIPTION
|
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|
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.BR syscall ()
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2012-07-13 06:07:19 +00:00
|
|
|
is a small library function that invokes
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|
|
|
the system call whose assembly language
|
2004-11-03 13:51:07 +00:00
|
|
|
interface has the specified
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2007-05-26 14:10:51 +00:00
|
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.I number
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2004-11-03 13:51:07 +00:00
|
|
|
with the specified arguments.
|
2012-07-13 06:07:19 +00:00
|
|
|
Employing
|
|
|
|
.BR syscall ()
|
|
|
|
is useful, for example,
|
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|
|
when invoking a system call that has no wrapper function in the C library.
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2012-07-13 06:07:19 +00:00
|
|
|
.BR syscall ()
|
|
|
|
saves CPU registers before making the system call,
|
|
|
|
restores the registers upon return from the system call,
|
2020-06-08 20:59:47 +00:00
|
|
|
and stores any error returned by the system call in
|
|
|
|
.BR errno (3).
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2012-07-13 06:07:19 +00:00
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|
|
Symbolic constants for system call numbers can be found in the header file
|
2007-05-26 14:10:51 +00:00
|
|
|
.IR <sys/syscall.h> .
|
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|
.SH RETURN VALUE
|
2004-11-03 13:51:07 +00:00
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The return value is defined by the system call being invoked.
|
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|
In general, a 0 return value indicates success.
|
2005-06-15 14:10:23 +00:00
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|
A \-1 return value indicates an error,
|
2020-06-08 20:59:47 +00:00
|
|
|
and an error number is stored in
|
2007-05-26 14:10:51 +00:00
|
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|
.IR errno .
|
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|
.SH NOTES
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.BR syscall ()
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|
first appeared in
|
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|
4BSD.
|
2013-04-01 09:09:33 +00:00
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.SS Architecture-specific requirements
|
2013-04-01 06:24:53 +00:00
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Each architecture ABI has its own requirements on how
|
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system call arguments are passed to the kernel.
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For system calls that have a glibc wrapper (e.g., most system calls),
|
2013-04-01 09:09:33 +00:00
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|
glibc handles the details of copying arguments to the right registers
|
2013-04-01 06:24:53 +00:00
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in a manner suitable for the architecture.
|
2013-04-01 06:08:37 +00:00
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|
|
However, when using
|
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|
|
.BR syscall ()
|
|
|
|
to make a system call,
|
2013-04-01 09:09:33 +00:00
|
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|
the caller might need to handle architecture-dependent details;
|
|
|
|
this requirement is most commonly encountered on certain 32-bit architectures.
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2013-04-01 09:09:33 +00:00
|
|
|
For example, on the ARM architecture Embedded ABI (EABI), a
|
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|
64-bit value (e.g.,
|
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|
.IR "long long" )
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must be aligned to an even register pair.
|
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Thus, using
|
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|
|
.BR syscall ()
|
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|
|
instead of the wrapper provided by glibc,
|
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the
|
2020-05-19 05:43:21 +00:00
|
|
|
.BR readahead (2)
|
2017-03-11 19:54:22 +00:00
|
|
|
system call would be invoked as follows on the ARM architecture with the EABI
|
|
|
|
in little endian mode:
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2013-04-01 06:24:53 +00:00
|
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|
.in +4n
|
execve.2, ioctl_console.2, ioctl_iflags.2, ioctl_ns.2, ioctl_userfaultfd.2, kcmp.2, kexec_load.2, keyctl.2, link.2, listxattr.2, membarrier.2, memfd_create.2, mmap.2, modify_ldt.2, mprotect.2, msgctl.2, nanosleep.2, open_by_handle_at.2, perf_event_open.2, poll.2, posix_fadvise.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, readdir.2, readv.2, recv.2, recvmmsg.2, request_key.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setscheduler.2, seccomp.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendmmsg.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sigaltstack.2, signal.2, sigwaitinfo.2, stat.2, statfs.2, statx.2, sync_file_range.2, syscall.2, sysctl.2, sysinfo.2, tee.2, timer_create.2, timer_settime.2, timerfd_create.2, unshare.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, aio_init.3, backtrace.3, basename.3, bswap.3, btree.3, clock_getcpuclockid.3, cmsg.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlinfo.3, dlopen.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, ether_aton.3, fgetgrent.3, fgetpwent.3, fmemopen.3, frexp.3, ftime.3, fts.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, getifaddrs.3, getipnodebyname.3, getmntent.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, ntp_gettime.3, posix_openpt.3, printf.3, pthread_attr_init.3, pthread_attr_setschedparam.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_tryjoin_np.3, readdir.3, realpath.3, recno.3, regex.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, statvfs.3, strcat.3, strcpy.3, strftime.3, strtok.3, strtol.3, strverscmp.3, toupper.3, ttyslot.3, xdr.3, fuse.4, loop.4, rtc.4, st.4, acct.5, core.5, elf.5, slabinfo.5, aio.7, arp.7, capabilities.7, cgroup_namespaces.7, cgroups.7, ddp.7, fanotify.7, feature_test_macros.7, inode.7, inotify.7, ip.7, keyrings.7, locale.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, packet.7, pkeys.7, pthreads.7, sched.7, session-keyring.7, sock_diag.7, socket.7, spufs.7, udplite.7, unix.7, user_namespaces.7, vdso.7, x25.7, ld.so.8: Use consistent markup for code snippets
Change .nf/.fi to .EX/.EE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 19:52:46 +00:00
|
|
|
.EX
|
2013-04-01 09:09:33 +00:00
|
|
|
syscall(SYS_readahead, fd, 0,
|
|
|
|
(unsigned int) (offset & 0xFFFFFFFF),
|
2017-03-11 19:54:22 +00:00
|
|
|
(unsigned int) (offset >> 32),
|
2013-04-01 09:09:33 +00:00
|
|
|
count);
|
execve.2, ioctl_console.2, ioctl_iflags.2, ioctl_ns.2, ioctl_userfaultfd.2, kcmp.2, kexec_load.2, keyctl.2, link.2, listxattr.2, membarrier.2, memfd_create.2, mmap.2, modify_ldt.2, mprotect.2, msgctl.2, nanosleep.2, open_by_handle_at.2, perf_event_open.2, poll.2, posix_fadvise.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, readdir.2, readv.2, recv.2, recvmmsg.2, request_key.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setscheduler.2, seccomp.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendmmsg.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sigaltstack.2, signal.2, sigwaitinfo.2, stat.2, statfs.2, statx.2, sync_file_range.2, syscall.2, sysctl.2, sysinfo.2, tee.2, timer_create.2, timer_settime.2, timerfd_create.2, unshare.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, aio_init.3, backtrace.3, basename.3, bswap.3, btree.3, clock_getcpuclockid.3, cmsg.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlinfo.3, dlopen.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, ether_aton.3, fgetgrent.3, fgetpwent.3, fmemopen.3, frexp.3, ftime.3, fts.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, getifaddrs.3, getipnodebyname.3, getmntent.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, ntp_gettime.3, posix_openpt.3, printf.3, pthread_attr_init.3, pthread_attr_setschedparam.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_tryjoin_np.3, readdir.3, realpath.3, recno.3, regex.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, statvfs.3, strcat.3, strcpy.3, strftime.3, strtok.3, strtol.3, strverscmp.3, toupper.3, ttyslot.3, xdr.3, fuse.4, loop.4, rtc.4, st.4, acct.5, core.5, elf.5, slabinfo.5, aio.7, arp.7, capabilities.7, cgroup_namespaces.7, cgroups.7, ddp.7, fanotify.7, feature_test_macros.7, inode.7, inotify.7, ip.7, keyrings.7, locale.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, packet.7, pkeys.7, pthreads.7, sched.7, session-keyring.7, sock_diag.7, socket.7, spufs.7, udplite.7, unix.7, user_namespaces.7, vdso.7, x25.7, ld.so.8: Use consistent markup for code snippets
Change .nf/.fi to .EX/.EE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 19:52:46 +00:00
|
|
|
.EE
|
2013-04-01 06:24:53 +00:00
|
|
|
.in
|
|
|
|
.PP
|
2013-04-01 09:09:33 +00:00
|
|
|
Since the offset argument is 64 bits, and the first argument
|
|
|
|
.RI ( fd )
|
|
|
|
is passed in
|
|
|
|
.IR r0 ,
|
2013-04-02 07:08:21 +00:00
|
|
|
the caller must manually split and align the 64-bit value
|
|
|
|
so that it is passed in the
|
2013-04-01 09:09:33 +00:00
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|
|
.IR r2 / r3
|
|
|
|
register pair.
|
|
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|
That means inserting a dummy value into
|
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|
.I r1
|
|
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|
(the second argument of 0).
|
2017-03-11 19:54:22 +00:00
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|
|
Care also must be taken so that the split follows endian conventions
|
|
|
|
(according to the C ABI for the platform).
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2013-04-01 09:09:33 +00:00
|
|
|
Similar issues can occur on MIPS with the O32 ABI,
|
2018-11-06 21:39:59 +00:00
|
|
|
on PowerPC and parisc with the 32-bit ABI, and on Xtensa.
|
2013-04-01 09:09:33 +00:00
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|
.\" Mike Frysinger: this issue ends up forcing MIPS
|
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|
.\" O32 to take 7 arguments to syscall()
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2017-03-11 21:04:38 +00:00
|
|
|
.\" See arch/parisc/kernel/sys_parisc.c.
|
|
|
|
Note that while the parisc C ABI also uses aligned register pairs,
|
2018-04-27 12:44:52 +00:00
|
|
|
it uses a shim layer to hide the issue from user space.
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2013-04-01 07:33:11 +00:00
|
|
|
The affected system calls are
|
2013-04-01 09:09:33 +00:00
|
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|
.BR fadvise64_64 (2),
|
|
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|
.BR ftruncate64 (2),
|
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|
.BR posix_fadvise (2),
|
|
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|
.BR pread64 (2),
|
|
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.BR pwrite64 (2),
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.BR readahead (2),
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.BR sync_file_range (2),
|
2013-04-01 07:33:11 +00:00
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|
and
|
|
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|
.BR truncate64 (2).
|
2017-08-12 20:58:08 +00:00
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.PP
|
2017-03-11 19:54:22 +00:00
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|
.\" You need to look up the syscalls directly in the kernel source to see if
|
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.\" they should be in this list. For example, look at fs/read_write.c and
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.\" the function signatures that do:
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.\" ..., unsigned long, pos_l, unsigned long, pos_h, ...
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.\" If they use off_t, then they most likely do not belong in this list.
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This does not affect syscalls that manually split and assemble 64-bit values
|
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such as
|
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.BR _llseek (2),
|
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.BR preadv (2),
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|
.BR preadv2 (2),
|
2018-09-19 17:12:33 +00:00
|
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|
.BR pwritev (2),
|
2017-03-11 19:54:22 +00:00
|
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|
and
|
|
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|
.BR pwritev2 (2).
|
|
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|
Welcome to the wonderful world of historical baggage.
|
2013-04-08 09:16:52 +00:00
|
|
|
.SS Architecture calling conventions
|
|
|
|
Every architecture has its own way of invoking and passing arguments to the
|
|
|
|
kernel.
|
|
|
|
The details for various architectures are listed in the two tables below.
|
2017-08-12 20:58:08 +00:00
|
|
|
.PP
|
2015-12-30 10:09:33 +00:00
|
|
|
The first table lists the instruction used to transition to kernel mode
|
2013-04-08 09:16:52 +00:00
|
|
|
(which might not be the fastest or best way to transition to the kernel,
|
2014-01-01 08:29:53 +00:00
|
|
|
so you might have to refer to
|
|
|
|
.BR vdso (7)),
|
2013-04-08 09:16:52 +00:00
|
|
|
the register used to indicate the system call number,
|
2019-01-04 15:08:06 +00:00
|
|
|
the register(s) used to return the system call result,
|
2015-12-30 02:00:00 +00:00
|
|
|
and the register used to signal an error.
|
2013-04-08 09:16:52 +00:00
|
|
|
.if t \{\
|
|
|
|
.ft CW
|
|
|
|
\}
|
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|
.TS
|
2019-01-09 17:06:20 +00:00
|
|
|
l2 l2 l2 l2 l1 l2 l.
|
2019-01-09 17:16:24 +00:00
|
|
|
Arch/ABI Instruction System Ret Ret Error Notes
|
2019-01-09 17:06:20 +00:00
|
|
|
call # val val2
|
2013-04-08 09:16:52 +00:00
|
|
|
_
|
2019-01-09 17:06:20 +00:00
|
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|
alpha callsys v0 v0 a4 a3 1, 6
|
2019-01-04 15:08:06 +00:00
|
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|
arc trap0 r8 r0 - -
|
2020-05-05 15:24:39 +00:00
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|
arm/OABI swi NR - r0 - - 2
|
2019-01-04 15:08:06 +00:00
|
|
|
arm/EABI swi 0x0 r7 r0 r1 -
|
2020-05-05 15:24:40 +00:00
|
|
|
arm64 svc #0 w8 x0 x1 -
|
2019-01-04 15:08:06 +00:00
|
|
|
blackfin excpt 0x0 P0 R0 - -
|
|
|
|
i386 int $0x80 eax eax edx -
|
2019-01-09 17:06:20 +00:00
|
|
|
ia64 break 0x100000 r15 r8 r9 r10 1, 6
|
2019-01-04 15:08:06 +00:00
|
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|
m68k trap #0 d0 d0 - -
|
|
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|
microblaze brki r14,8 r12 r3 - -
|
2019-01-09 17:06:20 +00:00
|
|
|
mips syscall v0 v0 v1 a3 1, 6
|
2019-01-04 15:08:06 +00:00
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|
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nios2 trap r2 r2 - r7
|
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parisc ble 0x100(%sr2, %r0) r20 r28 - -
|
2019-01-09 17:06:20 +00:00
|
|
|
powerpc sc r0 r3 - r0 1
|
2019-09-13 06:03:26 +00:00
|
|
|
powerpc64 sc r0 r3 - cr0.SO 1
|
2019-09-09 08:50:11 +00:00
|
|
|
riscv ecall a7 a0 a1 -
|
2019-01-09 17:06:20 +00:00
|
|
|
s390 svc 0 r1 r2 r3 - 3
|
|
|
|
s390x svc 0 r1 r2 r3 - 3
|
2020-12-22 12:20:53 +00:00
|
|
|
superh trapa #31 r3 r0 r1 - 4, 6
|
2019-01-09 17:06:20 +00:00
|
|
|
sparc/32 t 0x10 g1 o0 o1 psr/csr 1, 6
|
|
|
|
sparc/64 t 0x6d g1 o0 o1 psr/csr 1, 6
|
|
|
|
tile swint1 R10 R00 - R01 1
|
|
|
|
x86-64 syscall rax rax rdx - 5
|
|
|
|
x32 syscall rax rax rdx - 5
|
2019-01-04 15:08:06 +00:00
|
|
|
xtensa syscall a2 a2 - -
|
2013-04-08 09:16:52 +00:00
|
|
|
.TE
|
2014-03-19 16:03:44 +00:00
|
|
|
.PP
|
2015-12-30 10:06:40 +00:00
|
|
|
Notes:
|
|
|
|
.IP [1] 4
|
2015-12-30 02:00:00 +00:00
|
|
|
On a few architectures,
|
2015-12-30 10:33:56 +00:00
|
|
|
a register is used as a boolean
|
|
|
|
(0 indicating no error, and \-1 indicating an error) to signal that the
|
2015-12-30 02:00:00 +00:00
|
|
|
system call failed.
|
|
|
|
The actual error value is still contained in the return register.
|
2015-12-30 10:33:56 +00:00
|
|
|
On sparc, the carry bit
|
|
|
|
.RI ( csr )
|
|
|
|
in the processor status register
|
2015-12-30 18:19:38 +00:00
|
|
|
.RI ( psr )
|
2015-12-30 10:33:56 +00:00
|
|
|
is used instead of a full register.
|
2019-09-13 06:03:26 +00:00
|
|
|
On powerpc64, the summary overflow bit
|
|
|
|
.RI ( SO )
|
|
|
|
in field 0 of the condition register
|
|
|
|
.RI ( cr0 )
|
|
|
|
is used.
|
2015-12-30 10:06:40 +00:00
|
|
|
.IP [2]
|
2015-12-30 10:33:56 +00:00
|
|
|
.I NR
|
|
|
|
is the system call number.
|
2015-12-30 10:06:40 +00:00
|
|
|
.IP [3]
|
2015-12-30 10:33:56 +00:00
|
|
|
For s390 and s390x,
|
|
|
|
.I NR
|
|
|
|
(the system call number) may be passed directly with
|
|
|
|
.I "svc\ NR"
|
|
|
|
if it is less than 256.
|
2015-12-30 10:06:40 +00:00
|
|
|
.IP [4]
|
2020-12-22 12:20:53 +00:00
|
|
|
On SuperH additional trap numbers are supported for historic reasons, but
|
|
|
|
.BR trapa #31
|
|
|
|
is the recommended "unified" ABI.
|
2015-12-30 10:06:40 +00:00
|
|
|
.IP [5]
|
2018-10-14 14:48:54 +00:00
|
|
|
The x32 ABI shares syscall table with x86-64 ABI, but there are some
|
2018-09-19 17:12:36 +00:00
|
|
|
nuances:
|
|
|
|
.RS
|
|
|
|
.IP \(bu 3
|
2018-10-14 14:48:54 +00:00
|
|
|
In order to indicate that a system call is called under the x32 ABI,
|
|
|
|
an additional bit,
|
|
|
|
.BR __X32_SYSCALL_BIT ,
|
2018-09-19 17:12:36 +00:00
|
|
|
is bitwise-ORed with the system call number.
|
2018-10-14 14:48:54 +00:00
|
|
|
The ABI used by a process affects some process behaviors,
|
|
|
|
including signal handling or system call restarting.
|
2018-09-19 17:12:36 +00:00
|
|
|
.IP \(bu
|
|
|
|
Since x32 has different sizes for
|
|
|
|
.I long
|
|
|
|
and pointer types, layouts of some (but not all;
|
2018-10-14 14:48:54 +00:00
|
|
|
.I struct timeval
|
2018-09-19 17:12:36 +00:00
|
|
|
or
|
2018-10-14 14:48:54 +00:00
|
|
|
.I struct rlimit
|
|
|
|
are 64-bit, for example) structures are different.
|
|
|
|
In order to handle this,
|
|
|
|
additional system calls are added to the system call table,
|
|
|
|
starting from number 512
|
2018-09-19 17:12:36 +00:00
|
|
|
(without the
|
2018-10-14 14:48:54 +00:00
|
|
|
.BR __X32_SYSCALL_BIT ).
|
|
|
|
For example,
|
2018-09-19 17:12:36 +00:00
|
|
|
.B __NR_readv
|
2018-10-14 14:48:54 +00:00
|
|
|
is defined as 19 for the x86-64 ABI and as
|
2018-09-19 17:12:36 +00:00
|
|
|
.IR __X32_SYSCALL_BIT " | " \fB515\fP
|
2018-10-14 14:48:54 +00:00
|
|
|
for the x32 ABI.
|
|
|
|
Most of these additional system calls are actually identical
|
|
|
|
to the system calls used for providing i386 compat.
|
|
|
|
There are some notable exceptions, however, such as
|
2018-09-19 17:12:36 +00:00
|
|
|
.BR preadv2 (2),
|
2018-10-14 14:48:54 +00:00
|
|
|
which uses
|
|
|
|
.I struct iovec
|
|
|
|
entities with 4-byte pointers and sizes ("compat_iovec" in kernel terms),
|
|
|
|
but passes an 8-byte
|
2018-09-19 17:12:36 +00:00
|
|
|
.I pos
|
2018-10-14 14:48:54 +00:00
|
|
|
argument in a single register and not two, as is done in every other ABI.
|
2015-12-30 10:06:40 +00:00
|
|
|
.RE
|
2019-01-04 15:08:06 +00:00
|
|
|
.IP [6]
|
|
|
|
Some architectures
|
2019-01-09 06:10:30 +00:00
|
|
|
(namely, Alpha, IA-64, MIPS, SuperH, sparc/32, and sparc/64)
|
|
|
|
use an additional register ("Retval2" in the above table)
|
|
|
|
to pass back a second return value from the
|
2019-01-04 15:08:06 +00:00
|
|
|
.BR pipe (2)
|
|
|
|
system call;
|
2019-01-09 06:10:30 +00:00
|
|
|
Alpha uses this technique in the architecture-specific
|
|
|
|
.BR getxpid (2),
|
|
|
|
.BR getxuid (2),
|
|
|
|
and
|
|
|
|
.BR getxgid (2)
|
2019-01-04 15:08:06 +00:00
|
|
|
system calls as well.
|
|
|
|
Other architectures do not use the second return value register
|
2019-01-09 06:10:30 +00:00
|
|
|
in the system call interface, even if it is defined in the System V ABI.
|
2013-04-08 09:16:52 +00:00
|
|
|
.if t \{\
|
|
|
|
.in
|
|
|
|
.ft P
|
|
|
|
\}
|
|
|
|
.PP
|
|
|
|
The second table shows the registers used to pass the system call arguments.
|
|
|
|
.if t \{\
|
|
|
|
.ft CW
|
|
|
|
\}
|
|
|
|
.TS
|
2015-03-29 20:28:37 +00:00
|
|
|
l l2 l2 l2 l2 l2 l2 l2 l.
|
2019-01-09 17:16:24 +00:00
|
|
|
Arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7 Notes
|
2013-04-08 09:16:52 +00:00
|
|
|
_
|
2015-12-30 02:00:00 +00:00
|
|
|
alpha a0 a1 a2 a3 a4 a5 -
|
|
|
|
arc r0 r1 r2 r3 r4 r5 -
|
2020-05-05 15:24:39 +00:00
|
|
|
arm/OABI r0 r1 r2 r3 r4 r5 r6
|
2015-03-29 20:28:37 +00:00
|
|
|
arm/EABI r0 r1 r2 r3 r4 r5 r6
|
|
|
|
arm64 x0 x1 x2 x3 x4 x5 -
|
|
|
|
blackfin R0 R1 R2 R3 R4 R5 -
|
|
|
|
i386 ebx ecx edx esi edi ebp -
|
|
|
|
ia64 out0 out1 out2 out3 out4 out5 -
|
2015-12-30 02:00:00 +00:00
|
|
|
m68k d1 d2 d3 d4 d5 a0 -
|
|
|
|
microblaze r5 r6 r7 r8 r9 r10 -
|
2019-01-09 17:09:01 +00:00
|
|
|
mips/o32 a0 a1 a2 a3 - - - 1
|
2015-03-29 20:28:37 +00:00
|
|
|
mips/n32,64 a0 a1 a2 a3 a4 a5 -
|
2015-12-30 02:00:00 +00:00
|
|
|
nios2 r4 r5 r6 r7 r8 r9 -
|
2015-03-29 20:28:37 +00:00
|
|
|
parisc r26 r25 r24 r23 r22 r21 -
|
2015-12-30 02:00:00 +00:00
|
|
|
powerpc r3 r4 r5 r6 r7 r8 r9
|
2019-09-13 06:03:26 +00:00
|
|
|
powerpc64 r3 r4 r5 r6 r7 r8 -
|
2018-02-21 01:40:15 +00:00
|
|
|
riscv a0 a1 a2 a3 a4 a5 -
|
2015-03-29 20:28:37 +00:00
|
|
|
s390 r2 r3 r4 r5 r6 r7 -
|
|
|
|
s390x r2 r3 r4 r5 r6 r7 -
|
2015-12-30 02:00:00 +00:00
|
|
|
superh r4 r5 r6 r7 r0 r1 r2
|
2015-03-29 20:28:37 +00:00
|
|
|
sparc/32 o0 o1 o2 o3 o4 o5 -
|
|
|
|
sparc/64 o0 o1 o2 o3 o4 o5 -
|
2015-12-30 02:00:00 +00:00
|
|
|
tile R00 R01 R02 R03 R04 R05 -
|
clone.2, getcpu.2, shmget.2, syscall.2, dladdr.3, proc.5, vdso.7: Consistently use "x86-64", not "x86_64"
When referring to the architecture, consistently use "x86-64",
not "x86_64". Hitherto, there was a mixture of usages, with
"x86-64" predominant.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 07:19:34 +00:00
|
|
|
x86-64 rdi rsi rdx r10 r8 r9 -
|
2015-03-29 20:28:37 +00:00
|
|
|
x32 rdi rsi rdx r10 r8 r9 -
|
2015-12-30 02:00:00 +00:00
|
|
|
xtensa a6 a3 a4 a5 a8 a9 -
|
2013-04-08 09:16:52 +00:00
|
|
|
.TE
|
2015-01-18 07:22:04 +00:00
|
|
|
.PP
|
2015-12-30 10:06:40 +00:00
|
|
|
Notes:
|
|
|
|
.IP [1] 4
|
2015-01-18 18:55:41 +00:00
|
|
|
The mips/o32 system call convention passes
|
|
|
|
arguments 5 through 8 on the user stack.
|
2013-04-08 09:16:52 +00:00
|
|
|
.if t \{\
|
|
|
|
.in
|
|
|
|
.ft P
|
|
|
|
\}
|
|
|
|
.PP
|
|
|
|
Note that these tables don't cover the entire calling convention\(emsome
|
|
|
|
architectures may indiscriminately clobber other registers not listed here.
|
2020-05-21 08:00:37 +00:00
|
|
|
.SH EXAMPLES
|
_syscall.2, shmget.2, stat.2, syscall.2, sysctl.2, utimensat.2, wait.2, CPU_SET.3, a64l.3, alloca.3, atexit.3, basename.3, cacos.3, cacosh.3, carg.3, casin.3, casinh.3, catan.3, catanh.3, ccos.3, ccosh.3, cexp.3, cimag.3, clearenv.3, clog.3, conj.3, cosh.3, creal.3, csin.3, csinh.3, ctan.3, ctanh.3, difftime.3, div.3, dl_iterate_phdr.3, encrypt.3, envz_add.3, expm1.3, fenv.3, fmtmsg.3, fopen.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getcontext.3, getline.3, getpt.3, getpwnam.3, getsubopt.3, getttyent.3, getutent.3, hsearch.3, log1p.3, malloc_hook.3, malloc_info.3, mallopt.3, matherr.3, mbsinit.3, mempcpy.3, mtrace.3, nan.3, nl_langinfo.3, printf.3, pthread_setaffinity_np.3, pthread_tryjoin_np.3, rpmatch.3, rtime.3, rtnetlink.3, scalb.3, scalbln.3, sigvec.3: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 20:48:35 +00:00
|
|
|
.EX
|
2007-05-26 14:10:51 +00:00
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <sys/syscall.h>
|
|
|
|
#include <sys/types.h>
|
2013-08-09 07:33:51 +00:00
|
|
|
#include <signal.h>
|
2007-05-26 14:10:51 +00:00
|
|
|
|
|
|
|
int
|
|
|
|
main(int argc, char *argv[])
|
|
|
|
{
|
|
|
|
pid_t tid;
|
2007-12-25 16:11:05 +00:00
|
|
|
|
2007-07-08 17:00:49 +00:00
|
|
|
tid = syscall(SYS_gettid);
|
2016-12-10 09:06:24 +00:00
|
|
|
syscall(SYS_tgkill, getpid(), tid, SIGHUP);
|
2007-05-26 14:10:51 +00:00
|
|
|
}
|
_syscall.2, shmget.2, stat.2, syscall.2, sysctl.2, utimensat.2, wait.2, CPU_SET.3, a64l.3, alloca.3, atexit.3, basename.3, cacos.3, cacosh.3, carg.3, casin.3, casinh.3, catan.3, catanh.3, ccos.3, ccosh.3, cexp.3, cimag.3, clearenv.3, clog.3, conj.3, cosh.3, creal.3, csin.3, csinh.3, ctan.3, ctanh.3, difftime.3, div.3, dl_iterate_phdr.3, encrypt.3, envz_add.3, expm1.3, fenv.3, fmtmsg.3, fopen.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getcontext.3, getline.3, getpt.3, getpwnam.3, getsubopt.3, getttyent.3, getutent.3, hsearch.3, log1p.3, malloc_hook.3, malloc_info.3, mallopt.3, matherr.3, mbsinit.3, mempcpy.3, mtrace.3, nan.3, nl_langinfo.3, printf.3, pthread_setaffinity_np.3, pthread_tryjoin_np.3, rpmatch.3, rtime.3, rtnetlink.3, scalb.3, scalbln.3, sigvec.3: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-18 20:48:35 +00:00
|
|
|
.EE
|
2007-06-25 12:57:55 +00:00
|
|
|
.SH SEE ALSO
|
2007-12-17 11:24:18 +00:00
|
|
|
.BR _syscall (2),
|
2008-07-14 15:52:21 +00:00
|
|
|
.BR intro (2),
|
2014-01-01 08:29:53 +00:00
|
|
|
.BR syscalls (2),
|
2014-11-04 07:19:25 +00:00
|
|
|
.BR errno (3),
|
2014-01-01 08:29:53 +00:00
|
|
|
.BR vdso (7)
|