5403f186a7
This effectively mirrors our libc implementation, but with minor fudging -- name needs to be copied in from userspace, so we just copy it straight into stack-allocated memfd_name into the correct position rather than allocating memory that needs to be cleaned up. The sealing-related fcntl(2) commands, F_GET_SEALS and F_ADD_SEALS, have also been implemented now that we support them. Note that this implementation is still not quite at feature parity w.r.t. the actual Linux version; some caveats, from my foggy memory: - Need to implement SHM_GROW_ON_WRITE, default for memfd (in progress) - LTP wants the memfd name exposed to fdescfs - Linux allows open() of an fdescfs fd with O_TRUNC to truncate after dup. (?) Interested parties can install and run LTP from ports (devel/linux-ltp) to confirm any fixes. PR: 240874 Reviewed by: kib, trasz Differential Revision: https://reviews.freebsd.org/D21845
169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 Dmitry Chagin
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* All rights reserved.
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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/sdt.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <arm64/linux/linux.h>
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#include <arm64/linux/linux_proto.h>
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#include <compat/linux/linux_dtrace.h>
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#include <compat/linux/linux_util.h>
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// LINUXTODO: deduplicate arm64 dummy against other archs?
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// LINUXTODO: review/update/add unimplemented syscalls
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/* DTrace init */
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LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
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UNIMPLEMENTED(afs_syscall);
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UNIMPLEMENTED(create_module); /* Added in Linux 1.0 removed in 2.6. */
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UNIMPLEMENTED(epoll_ctl_old);
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UNIMPLEMENTED(epoll_wait_old);
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UNIMPLEMENTED(get_kernel_syms); /* Added in Linux 1.0 removed in 2.6. */
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UNIMPLEMENTED(get_thread_area);
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UNIMPLEMENTED(getpmsg);
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UNIMPLEMENTED(nfsservctl); /* Added in Linux 2.2 removed in 3.1. */
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UNIMPLEMENTED(putpmsg);
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UNIMPLEMENTED(query_module); /* Added in Linux 2.2 removed in 2.6. */
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UNIMPLEMENTED(security);
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UNIMPLEMENTED(set_thread_area);
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UNIMPLEMENTED(tuxcall);
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UNIMPLEMENTED(uselib);
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UNIMPLEMENTED(vserver);
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DUMMY(setfsuid);
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DUMMY(setfsgid);
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DUMMY(vhangup);
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DUMMY(pivot_root);
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DUMMY(adjtimex);
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DUMMY(swapoff);
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DUMMY(init_module);
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DUMMY(delete_module);
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DUMMY(lookup_dcookie);
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DUMMY(remap_file_pages);
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DUMMY(semtimedop);
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DUMMY(mbind);
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DUMMY(get_mempolicy);
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DUMMY(set_mempolicy);
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DUMMY(mq_open);
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DUMMY(mq_unlink);
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DUMMY(mq_timedsend);
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DUMMY(mq_timedreceive);
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DUMMY(mq_notify);
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DUMMY(mq_getsetattr);
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DUMMY(kexec_load);
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/* Linux 2.6.11: */
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DUMMY(add_key);
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DUMMY(request_key);
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DUMMY(keyctl);
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/* Linux 2.6.13: */
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DUMMY(ioprio_set);
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DUMMY(ioprio_get);
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DUMMY(inotify_add_watch);
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DUMMY(inotify_rm_watch);
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/* Linux 2.6.16: */
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DUMMY(migrate_pages);
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DUMMY(unshare);
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/* Linux 2.6.17: */
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DUMMY(splice);
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DUMMY(tee);
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DUMMY(vmsplice);
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/* Linux 2.6.18: */
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DUMMY(move_pages);
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/* Linux 2.6.27: */
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DUMMY(signalfd4);
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DUMMY(inotify_init1);
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/* Linux 2.6.31: */
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DUMMY(perf_event_open);
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/* Linux 2.6.36: */
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DUMMY(fanotify_init);
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DUMMY(fanotify_mark);
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/* Linux 2.6.39: */
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DUMMY(name_to_handle_at);
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DUMMY(open_by_handle_at);
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DUMMY(clock_adjtime);
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/* Linux 3.0: */
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DUMMY(setns);
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/* Linux 3.2: */
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DUMMY(process_vm_readv);
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DUMMY(process_vm_writev);
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/* Linux 3.5: */
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DUMMY(kcmp);
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/* Linux 3.8: */
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DUMMY(finit_module);
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DUMMY(sched_setattr);
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DUMMY(sched_getattr);
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/* Linux 3.17: */
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DUMMY(seccomp);
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/* Linux 3.18: */
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DUMMY(bpf);
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/* Linux 3.19: */
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DUMMY(execveat);
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/* Linux 4.2: */
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DUMMY(userfaultfd);
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/* Linux 4.3: */
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DUMMY(membarrier);
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/* Linux 4.4: */
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DUMMY(mlock2);
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/* Linux 4.6: */
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DUMMY(preadv2);
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DUMMY(pwritev2);
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/* Linux 4.8: */
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DUMMY(pkey_mprotect);
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DUMMY(pkey_alloc);
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DUMMY(pkey_free);
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#define DUMMY_XATTR(s) \
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int \
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linux_ ## s ## xattr( \
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struct thread *td, struct linux_ ## s ## xattr_args *arg) \
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{ \
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\
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return (EOPNOTSUPP); \
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}
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DUMMY_XATTR(set);
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DUMMY_XATTR(lset);
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DUMMY_XATTR(fset);
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DUMMY_XATTR(get);
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DUMMY_XATTR(lget);
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DUMMY_XATTR(fget);
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DUMMY_XATTR(list);
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DUMMY_XATTR(llist);
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DUMMY_XATTR(flist);
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DUMMY_XATTR(remove);
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DUMMY_XATTR(lremove);
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DUMMY_XATTR(fremove);
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