1517 lines
38 KiB
C
1517 lines
38 KiB
C
/* $NetBSD: linux_misc.c,v 1.240 2018/09/03 16:29:29 riastradh Exp $ */
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/*-
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* Copyright (c) 1995, 1998, 1999, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe
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* of the Numerical Aerospace Simulation Facility, NASA Ames Research Center.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Linux compatibility module. Try to deal with various Linux system calls.
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*/
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/*
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* These functions have been moved to multiarch to allow
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* selection of which machines include them to be
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* determined by the individual files.linux_<arch> files.
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*
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* Function in multiarch:
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* linux_sys_break : linux_break.c
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* linux_sys_alarm : linux_misc_notalpha.c
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* linux_sys_getresgid : linux_misc_notalpha.c
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* linux_sys_nice : linux_misc_notalpha.c
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* linux_sys_readdir : linux_misc_notalpha.c
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* linux_sys_setresgid : linux_misc_notalpha.c
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* linux_sys_time : linux_misc_notalpha.c
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* linux_sys_utime : linux_misc_notalpha.c
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* linux_sys_waitpid : linux_misc_notalpha.c
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* linux_sys_old_mmap : linux_oldmmap.c
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* linux_sys_oldolduname : linux_oldolduname.c
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* linux_sys_oldselect : linux_oldselect.c
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* linux_sys_olduname : linux_olduname.c
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* linux_sys_pipe : linux_pipe.c
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.240 2018/09/03 16:29:29 riastradh Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/dirent.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/poll.h>
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#include <sys/prot.h>
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#include <sys/reboot.h>
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#include <sys/resource.h>
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#include <sys/resourcevar.h>
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#include <sys/select.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/times.h>
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#include <sys/vnode.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <sys/utsname.h>
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#include <sys/unistd.h>
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#include <sys/vfs_syscalls.h>
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#include <sys/swap.h> /* for SWAP_ON */
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#include <sys/sysctl.h> /* for KERN_DOMAINNAME */
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#include <sys/kauth.h>
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#include <sys/ptrace.h>
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#include <machine/ptrace.h>
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#include <sys/syscall.h>
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#include <sys/syscallargs.h>
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#include <compat/sys/resource.h>
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#include <compat/linux/common/linux_machdep.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_ipc.h>
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#include <compat/linux/common/linux_sem.h>
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#include <compat/linux/common/linux_fcntl.h>
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#include <compat/linux/common/linux_mmap.h>
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#include <compat/linux/common/linux_dirent.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_misc.h>
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#include <compat/linux/common/linux_statfs.h>
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#include <compat/linux/common/linux_limit.h>
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#include <compat/linux/common/linux_ptrace.h>
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#include <compat/linux/common/linux_reboot.h>
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#include <compat/linux/common/linux_emuldata.h>
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#include <compat/linux/common/linux_sched.h>
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#include <compat/linux/linux_syscallargs.h>
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const int linux_ptrace_request_map[] = {
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LINUX_PTRACE_TRACEME, PT_TRACE_ME,
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LINUX_PTRACE_PEEKTEXT, PT_READ_I,
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LINUX_PTRACE_PEEKDATA, PT_READ_D,
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LINUX_PTRACE_POKETEXT, PT_WRITE_I,
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LINUX_PTRACE_POKEDATA, PT_WRITE_D,
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LINUX_PTRACE_CONT, PT_CONTINUE,
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LINUX_PTRACE_KILL, PT_KILL,
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LINUX_PTRACE_ATTACH, PT_ATTACH,
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LINUX_PTRACE_DETACH, PT_DETACH,
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# ifdef PT_STEP
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LINUX_PTRACE_SINGLESTEP, PT_STEP,
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# endif
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LINUX_PTRACE_SYSCALL, PT_SYSCALL,
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-1
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};
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const struct linux_mnttypes linux_fstypes[] = {
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{ MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_NFS, LINUX_NFS_SUPER_MAGIC },
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{ MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC },
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{ MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC },
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{ MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC },
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{ MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC },
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{ MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC },
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{ MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_CODA, LINUX_CODA_SUPER_MAGIC },
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{ MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC },
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{ MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC },
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{ MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC },
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{ MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC }
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};
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const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]);
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# ifdef DEBUG_LINUX
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#define DPRINTF(a) uprintf a
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# else
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#define DPRINTF(a)
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# endif
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/* Local linux_misc.c functions: */
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static void linux_to_bsd_mmap_args(struct sys_mmap_args *,
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const struct linux_sys_mmap_args *);
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static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *,
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register_t *, off_t);
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/*
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* The information on a terminated (or stopped) process needs
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* to be converted in order for Linux binaries to get a valid signal
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* number out of it.
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*/
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int
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bsd_to_linux_wstat(int st)
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{
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int sig;
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if (WIFSIGNALED(st)) {
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sig = WTERMSIG(st);
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if (sig >= 0 && sig < NSIG)
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st= (st & ~0177) | native_to_linux_signo[sig];
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} else if (WIFSTOPPED(st)) {
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sig = WSTOPSIG(st);
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if (sig >= 0 && sig < NSIG)
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st = (st & ~0xff00) |
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(native_to_linux_signo[sig] << 8);
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}
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return st;
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}
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/*
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* wait4(2). Passed on to the NetBSD call, surrounded by code to
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* reserve some space for a NetBSD-style wait status, and converting
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* it to what Linux wants.
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*/
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int
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linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) pid;
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syscallarg(int *) status;
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syscallarg(int) options;
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syscallarg(struct rusage50 *) rusage;
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} */
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int error, status, options, linux_options, pid = SCARG(uap, pid);
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struct rusage50 ru50;
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struct rusage ru;
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proc_t *p;
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linux_options = SCARG(uap, options);
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if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS))
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return (EINVAL);
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options = 0;
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if (linux_options & LINUX_WAIT4_WNOHANG)
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options |= WNOHANG;
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if (linux_options & LINUX_WAIT4_WUNTRACED)
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options |= WUNTRACED;
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if (linux_options & LINUX_WAIT4_WCONTINUED)
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options |= WCONTINUED;
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if (linux_options & LINUX_WAIT4_WALL)
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options |= WALLSIG;
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if (linux_options & LINUX_WAIT4_WCLONE)
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options |= WALTSIG;
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# ifdef DIAGNOSTIC
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if (linux_options & LINUX_WAIT4_WNOTHREAD)
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printf("WARNING: %s: linux process %d.%d called "
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"waitpid with __WNOTHREAD set!",
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__FILE__, l->l_proc->p_pid, l->l_lid);
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# endif
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error = do_sys_wait(&pid, &status, options,
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SCARG(uap, rusage) != NULL ? &ru : NULL);
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retval[0] = pid;
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if (pid == 0)
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return error;
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p = curproc;
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mutex_enter(p->p_lock);
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sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */
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mutex_exit(p->p_lock);
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if (SCARG(uap, rusage) != NULL) {
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rusage_to_rusage50(&ru, &ru50);
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error = copyout(&ru, SCARG(uap, rusage), sizeof(ru));
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}
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if (error == 0 && SCARG(uap, status) != NULL) {
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status = bsd_to_linux_wstat(status);
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error = copyout(&status, SCARG(uap, status), sizeof status);
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}
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return error;
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}
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/*
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* Linux brk(2). Like native, but always return the new break value.
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*/
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int
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linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval)
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{
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/* {
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syscallarg(char *) nsize;
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} */
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struct proc *p = l->l_proc;
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struct vmspace *vm = p->p_vmspace;
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struct sys_obreak_args oba;
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SCARG(&oba, nsize) = SCARG(uap, nsize);
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(void) sys_obreak(l, &oba, retval);
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retval[0] = (register_t)((char *)vm->vm_daddr + ptoa(vm->vm_dsize));
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return 0;
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}
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/*
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* Implement the fs stat functions. Straightforward.
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*/
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int
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linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval)
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{
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/* {
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syscallarg(const char *) path;
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syscallarg(struct linux_statfs *) sp;
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} */
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struct statvfs *sb;
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struct linux_statfs ltmp;
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int error;
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sb = STATVFSBUF_GET();
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error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb);
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if (error == 0) {
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bsd_to_linux_statfs(sb, <mp);
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error = copyout(<mp, SCARG(uap, sp), sizeof ltmp);
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}
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STATVFSBUF_PUT(sb);
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return error;
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}
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int
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linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) fd;
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syscallarg(struct linux_statfs *) sp;
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} */
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struct statvfs *sb;
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struct linux_statfs ltmp;
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int error;
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sb = STATVFSBUF_GET();
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error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb);
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if (error == 0) {
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bsd_to_linux_statfs(sb, <mp);
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error = copyout(<mp, SCARG(uap, sp), sizeof ltmp);
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}
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STATVFSBUF_PUT(sb);
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return error;
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}
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/*
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* uname(). Just copy the info from the various strings stored in the
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* kernel, and put it in the Linux utsname structure. That structure
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* is almost the same as the NetBSD one, only it has fields 65 characters
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* long, and an extra domainname field.
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*/
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int
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linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval)
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{
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/* {
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syscallarg(struct linux_utsname *) up;
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} */
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struct linux_utsname luts;
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strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname));
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strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename));
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strlcpy(luts.l_release, linux_release, sizeof(luts.l_release));
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strlcpy(luts.l_version, linux_version, sizeof(luts.l_version));
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strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine));
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strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname));
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return copyout(&luts, SCARG(uap, up), sizeof(luts));
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}
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/* Used directly on: alpha, mips, ppc, sparc, sparc64 */
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/* Used indirectly on: arm, i386, m68k */
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/*
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* New type Linux mmap call.
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* Only called directly on machines with >= 6 free regs.
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*/
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int
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linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval)
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{
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/* {
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syscallarg(unsigned long) addr;
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syscallarg(size_t) len;
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syscallarg(int) prot;
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syscallarg(int) flags;
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syscallarg(int) fd;
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syscallarg(linux_off_t) offset;
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} */
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if (SCARG(uap, offset) & PAGE_MASK)
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return EINVAL;
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return linux_mmap(l, uap, retval, SCARG(uap, offset));
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}
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/*
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* Guts of most architectures' mmap64() implementations. This shares
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* its list of arguments with linux_sys_mmap().
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*
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* The difference in linux_sys_mmap2() is that "offset" is actually
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* (offset / pagesize), not an absolute byte count. This translation
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* to pagesize offsets is done inside glibc between the mmap64() call
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* point, and the actual syscall.
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*/
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int
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linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval)
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{
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/* {
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syscallarg(unsigned long) addr;
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syscallarg(size_t) len;
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syscallarg(int) prot;
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syscallarg(int) flags;
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syscallarg(int) fd;
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syscallarg(linux_off_t) offset;
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} */
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return linux_mmap(l, uap, retval,
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((off_t)SCARG(uap, offset)) << PAGE_SHIFT);
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}
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/*
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* Massage arguments and call system mmap(2).
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*/
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static int
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linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset)
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{
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struct sys_mmap_args cma;
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int error;
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size_t mmoff=0;
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linux_to_bsd_mmap_args(&cma, uap);
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SCARG(&cma, pos) = offset;
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if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) {
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/*
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* Request for stack-like memory segment. On linux, this
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* works by mmap()ping (small) segment, which is automatically
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* extended when page fault happens below the currently
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* allocated area. We emulate this by allocating (typically
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* bigger) segment sized at current stack size limit, and
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* offsetting the requested and returned address accordingly.
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* Since physical pages are only allocated on-demand, this
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* is effectively identical.
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*/
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rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur;
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if (SCARG(&cma, len) < ssl) {
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/* Compute the address offset */
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mmoff = round_page(ssl) - SCARG(uap, len);
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if (SCARG(&cma, addr))
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SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff;
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SCARG(&cma, len) = (size_t) ssl;
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}
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}
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error = sys_mmap(l, &cma, retval);
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if (error)
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return (error);
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/* Shift the returned address for stack-like segment if necessary */
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retval[0] += mmoff;
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return (0);
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}
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static void
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linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap)
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{
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int flags = MAP_TRYFIXED, fl = SCARG(uap, flags);
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|
|
flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED);
|
|
flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE);
|
|
flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED);
|
|
flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON);
|
|
flags |= cvtto_bsd_mask(fl, LINUX_MAP_LOCKED, MAP_WIRED);
|
|
/* XXX XAX ERH: Any other flags here? There are more defined... */
|
|
|
|
SCARG(cma, addr) = (void *)SCARG(uap, addr);
|
|
SCARG(cma, len) = SCARG(uap, len);
|
|
SCARG(cma, prot) = SCARG(uap, prot);
|
|
if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */
|
|
SCARG(cma, prot) |= VM_PROT_READ;
|
|
SCARG(cma, flags) = flags;
|
|
SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd);
|
|
SCARG(cma, PAD) = 0;
|
|
}
|
|
|
|
#define LINUX_MREMAP_MAYMOVE 1
|
|
#define LINUX_MREMAP_FIXED 2
|
|
|
|
int
|
|
linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(void *) old_address;
|
|
syscallarg(size_t) old_size;
|
|
syscallarg(size_t) new_size;
|
|
syscallarg(u_long) flags;
|
|
} */
|
|
|
|
struct proc *p;
|
|
struct vm_map *map;
|
|
vaddr_t oldva;
|
|
vaddr_t newva;
|
|
size_t oldsize;
|
|
size_t newsize;
|
|
int flags;
|
|
int uvmflags;
|
|
int error;
|
|
|
|
flags = SCARG(uap, flags);
|
|
oldva = (vaddr_t)SCARG(uap, old_address);
|
|
oldsize = round_page(SCARG(uap, old_size));
|
|
newsize = round_page(SCARG(uap, new_size));
|
|
if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if ((flags & LINUX_MREMAP_FIXED) != 0) {
|
|
if ((flags & LINUX_MREMAP_MAYMOVE) == 0) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
#if 0 /* notyet */
|
|
newva = SCARG(uap, new_address);
|
|
uvmflags = MAP_FIXED;
|
|
#else /* notyet */
|
|
error = EOPNOTSUPP;
|
|
goto done;
|
|
#endif /* notyet */
|
|
} else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) {
|
|
uvmflags = 0;
|
|
} else {
|
|
newva = oldva;
|
|
uvmflags = MAP_FIXED;
|
|
}
|
|
p = l->l_proc;
|
|
map = &p->p_vmspace->vm_map;
|
|
error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p,
|
|
uvmflags);
|
|
|
|
done:
|
|
*retval = (error != 0) ? 0 : (register_t)newva;
|
|
return error;
|
|
}
|
|
|
|
#ifdef USRSTACK
|
|
int
|
|
linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const void *) start;
|
|
syscallarg(unsigned long) len;
|
|
syscallarg(int) prot;
|
|
} */
|
|
struct vm_map_entry *entry;
|
|
struct vm_map *map;
|
|
struct proc *p;
|
|
vaddr_t end, start, len, stacklim;
|
|
int prot, grows;
|
|
|
|
start = (vaddr_t)SCARG(uap, start);
|
|
len = round_page(SCARG(uap, len));
|
|
prot = SCARG(uap, prot);
|
|
grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP);
|
|
prot &= ~grows;
|
|
end = start + len;
|
|
|
|
if (start & PAGE_MASK)
|
|
return EINVAL;
|
|
if (end < start)
|
|
return EINVAL;
|
|
if (end == start)
|
|
return 0;
|
|
|
|
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
|
|
return EINVAL;
|
|
if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP))
|
|
return EINVAL;
|
|
|
|
p = l->l_proc;
|
|
map = &p->p_vmspace->vm_map;
|
|
vm_map_lock(map);
|
|
# ifdef notdef
|
|
VM_MAP_RANGE_CHECK(map, start, end);
|
|
# endif
|
|
if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) {
|
|
vm_map_unlock(map);
|
|
return ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Approximate the behaviour of PROT_GROWS{DOWN,UP}.
|
|
*/
|
|
|
|
stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur;
|
|
if (grows & LINUX_PROT_GROWSDOWN) {
|
|
if (USRSTACK - stacklim <= start && start < USRSTACK) {
|
|
start = USRSTACK - stacklim;
|
|
} else {
|
|
start = entry->start;
|
|
}
|
|
} else if (grows & LINUX_PROT_GROWSUP) {
|
|
if (USRSTACK <= end && end < USRSTACK + stacklim) {
|
|
end = USRSTACK + stacklim;
|
|
} else {
|
|
end = entry->end;
|
|
}
|
|
}
|
|
vm_map_unlock(map);
|
|
return uvm_map_protect_user(l, start, end, prot);
|
|
}
|
|
#endif /* USRSTACK */
|
|
|
|
/*
|
|
* This code is partly stolen from src/lib/libc/compat-43/times.c
|
|
*/
|
|
|
|
#define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz))
|
|
|
|
int
|
|
linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(struct times *) tms;
|
|
} */
|
|
struct proc *p = l->l_proc;
|
|
struct timeval t;
|
|
int error;
|
|
|
|
if (SCARG(uap, tms)) {
|
|
struct linux_tms ltms;
|
|
struct rusage ru;
|
|
|
|
mutex_enter(p->p_lock);
|
|
calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL);
|
|
ltms.ltms_utime = CONVTCK(ru.ru_utime);
|
|
ltms.ltms_stime = CONVTCK(ru.ru_stime);
|
|
ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime);
|
|
ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime);
|
|
mutex_exit(p->p_lock);
|
|
|
|
if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms)))
|
|
return error;
|
|
}
|
|
|
|
getmicrouptime(&t);
|
|
|
|
retval[0] = ((linux_clock_t)(CONVTCK(t)));
|
|
return 0;
|
|
}
|
|
|
|
#undef CONVTCK
|
|
|
|
/*
|
|
* Linux 'readdir' call. This code is mostly taken from the
|
|
* SunOS getdents call (see compat/sunos/sunos_misc.c), though
|
|
* an attempt has been made to keep it a little cleaner (failing
|
|
* miserably, because of the cruft needed if count 1 is passed).
|
|
*
|
|
* The d_off field should contain the offset of the next valid entry,
|
|
* but in Linux it has the offset of the entry itself. We emulate
|
|
* that bug here.
|
|
*
|
|
* Read in BSD-style entries, convert them, and copy them out.
|
|
*
|
|
* Note that this doesn't handle union-mounted filesystems.
|
|
*/
|
|
int
|
|
linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct linux_dirent *) dent;
|
|
syscallarg(unsigned int) count;
|
|
} */
|
|
struct dirent *bdp;
|
|
struct vnode *vp;
|
|
char *inp, *tbuf; /* BSD-format */
|
|
int len, reclen; /* BSD-format */
|
|
char *outp; /* Linux-format */
|
|
int resid, linux_reclen = 0; /* Linux-format */
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
struct linux_dirent idb;
|
|
off_t off; /* true file offset */
|
|
int buflen, error, eofflag, nbytes, oldcall;
|
|
struct vattr va;
|
|
off_t *cookiebuf = NULL, *cookie;
|
|
int ncookies;
|
|
|
|
/* fd_getvnode() will use the descriptor for us */
|
|
if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
error = EBADF;
|
|
goto out1;
|
|
}
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out1;
|
|
}
|
|
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
error = VOP_GETATTR(vp, &va, l->l_cred);
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
goto out1;
|
|
|
|
nbytes = SCARG(uap, count);
|
|
if (nbytes == 1) { /* emulating old, broken behaviour */
|
|
nbytes = sizeof (idb);
|
|
buflen = uimax(va.va_blocksize, nbytes);
|
|
oldcall = 1;
|
|
} else {
|
|
buflen = uimin(MAXBSIZE, nbytes);
|
|
if (buflen < va.va_blocksize)
|
|
buflen = va.va_blocksize;
|
|
oldcall = 0;
|
|
}
|
|
tbuf = malloc(buflen, M_TEMP, M_WAITOK);
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
off = fp->f_offset;
|
|
again:
|
|
aiov.iov_base = tbuf;
|
|
aiov.iov_len = buflen;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_resid = buflen;
|
|
auio.uio_offset = off;
|
|
UIO_SETUP_SYSSPACE(&auio);
|
|
/*
|
|
* First we read into the malloc'ed buffer, then
|
|
* we massage it into user space, one record at a time.
|
|
*/
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf,
|
|
&ncookies);
|
|
if (error)
|
|
goto out;
|
|
|
|
inp = tbuf;
|
|
outp = (void *)SCARG(uap, dent);
|
|
resid = nbytes;
|
|
if ((len = buflen - auio.uio_resid) == 0)
|
|
goto eof;
|
|
|
|
for (cookie = cookiebuf; len > 0; len -= reclen) {
|
|
bdp = (struct dirent *)inp;
|
|
reclen = bdp->d_reclen;
|
|
if (reclen & 3) {
|
|
error = EIO;
|
|
goto out;
|
|
}
|
|
if (bdp->d_fileno == 0) {
|
|
inp += reclen; /* it is a hole; squish it out */
|
|
if (cookie)
|
|
off = *cookie++;
|
|
else
|
|
off += reclen;
|
|
continue;
|
|
}
|
|
linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen);
|
|
if (reclen > len || resid < linux_reclen) {
|
|
/* entry too big for buffer, so just stop */
|
|
outp++;
|
|
break;
|
|
}
|
|
/*
|
|
* Massage in place to make a Linux-shaped dirent (otherwise
|
|
* we have to worry about touching user memory outside of
|
|
* the copyout() call).
|
|
*/
|
|
idb.d_ino = bdp->d_fileno;
|
|
/*
|
|
* The old readdir() call misuses the offset and reclen fields.
|
|
*/
|
|
if (oldcall) {
|
|
idb.d_off = (linux_off_t)linux_reclen;
|
|
idb.d_reclen = (u_short)bdp->d_namlen;
|
|
} else {
|
|
if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) {
|
|
compat_offseterr(vp, "linux_getdents");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
idb.d_off = (linux_off_t)off;
|
|
idb.d_reclen = (u_short)linux_reclen;
|
|
/* Linux puts d_type at the end of each record */
|
|
*((char *)&idb + idb.d_reclen - 1) = bdp->d_type;
|
|
}
|
|
memcpy(idb.d_name, bdp->d_name,
|
|
MIN(sizeof(idb.d_name), bdp->d_namlen + 1));
|
|
if ((error = copyout((void *)&idb, outp, linux_reclen)))
|
|
goto out;
|
|
/* advance past this real entry */
|
|
inp += reclen;
|
|
if (cookie)
|
|
off = *cookie++; /* each entry points to itself */
|
|
else
|
|
off += reclen;
|
|
/* advance output past Linux-shaped entry */
|
|
outp += linux_reclen;
|
|
resid -= linux_reclen;
|
|
if (oldcall)
|
|
break;
|
|
}
|
|
|
|
/* if we squished out the whole block, try again */
|
|
if (outp == (void *)SCARG(uap, dent)) {
|
|
if (cookiebuf)
|
|
free(cookiebuf, M_TEMP);
|
|
cookiebuf = NULL;
|
|
goto again;
|
|
}
|
|
fp->f_offset = off; /* update the vnode offset */
|
|
|
|
if (oldcall)
|
|
nbytes = resid + linux_reclen;
|
|
|
|
eof:
|
|
*retval = nbytes - resid;
|
|
out:
|
|
VOP_UNLOCK(vp);
|
|
if (cookiebuf)
|
|
free(cookiebuf, M_TEMP);
|
|
free(tbuf, M_TEMP);
|
|
out1:
|
|
fd_putfile(SCARG(uap, fd));
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Even when just using registers to pass arguments to syscalls you can
|
|
* have 5 of them on the i386. So this newer version of select() does
|
|
* this.
|
|
*/
|
|
int
|
|
linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) nfds;
|
|
syscallarg(fd_set *) readfds;
|
|
syscallarg(fd_set *) writefds;
|
|
syscallarg(fd_set *) exceptfds;
|
|
syscallarg(struct timeval50 *) timeout;
|
|
} */
|
|
|
|
return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds),
|
|
SCARG(uap, writefds), SCARG(uap, exceptfds),
|
|
(struct linux_timeval *)SCARG(uap, timeout));
|
|
}
|
|
|
|
/*
|
|
* Common code for the old and new versions of select(). A couple of
|
|
* things are important:
|
|
* 1) return the amount of time left in the 'timeout' parameter
|
|
* 2) select never returns ERESTART on Linux, always return EINTR
|
|
*/
|
|
int
|
|
linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds,
|
|
fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout)
|
|
{
|
|
struct timespec ts0, ts1, uts, *ts = NULL;
|
|
struct linux_timeval ltv;
|
|
int error;
|
|
|
|
/*
|
|
* Store current time for computation of the amount of
|
|
* time left.
|
|
*/
|
|
if (timeout) {
|
|
if ((error = copyin(timeout, <v, sizeof(ltv))))
|
|
return error;
|
|
uts.tv_sec = ltv.tv_sec;
|
|
uts.tv_nsec = ltv.tv_usec * 1000;
|
|
if (itimespecfix(&uts)) {
|
|
/*
|
|
* The timeval was invalid. Convert it to something
|
|
* valid that will act as it does under Linux.
|
|
*/
|
|
uts.tv_sec += uts.tv_nsec / 1000000000;
|
|
uts.tv_nsec %= 1000000000;
|
|
if (uts.tv_nsec < 0) {
|
|
uts.tv_sec -= 1;
|
|
uts.tv_nsec += 1000000000;
|
|
}
|
|
if (uts.tv_sec < 0)
|
|
timespecclear(&uts);
|
|
}
|
|
ts = &uts;
|
|
nanotime(&ts0);
|
|
}
|
|
|
|
error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL);
|
|
|
|
if (error) {
|
|
/*
|
|
* See fs/select.c in the Linux kernel. Without this,
|
|
* Maelstrom doesn't work.
|
|
*/
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
return error;
|
|
}
|
|
|
|
if (timeout) {
|
|
if (*retval) {
|
|
/*
|
|
* Compute how much time was left of the timeout,
|
|
* by subtracting the current time and the time
|
|
* before we started the call, and subtracting
|
|
* that result from the user-supplied value.
|
|
*/
|
|
nanotime(&ts1);
|
|
timespecsub(&ts1, &ts0, &ts1);
|
|
timespecsub(&uts, &ts1, &uts);
|
|
if (uts.tv_sec < 0)
|
|
timespecclear(&uts);
|
|
} else
|
|
timespecclear(&uts);
|
|
ltv.tv_sec = uts.tv_sec;
|
|
ltv.tv_usec = uts.tv_nsec / 1000;
|
|
if ((error = copyout(<v, timeout, sizeof(ltv))))
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Derived from FreeBSD's sys/compat/linux/linux_misc.c:linux_pselect6()
|
|
* which was contributed by Dmitry Chagin
|
|
* https://svnweb.freebsd.org/base?view=revision&revision=283403
|
|
*/
|
|
int
|
|
linux_sys_pselect6(struct lwp *l,
|
|
const struct linux_sys_pselect6_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) nfds;
|
|
syscallarg(fd_set *) readfds;
|
|
syscallarg(fd_set *) writefds;
|
|
syscallarg(fd_set *) exceptfds;
|
|
syscallarg(struct timespec *) timeout;
|
|
syscallarg(linux_sized_sigset_t *) ss;
|
|
} */
|
|
struct timespec uts, ts0, ts1, *tsp;
|
|
linux_sized_sigset_t lsss;
|
|
struct linux_timespec lts;
|
|
linux_sigset_t lss;
|
|
sigset_t *ssp;
|
|
sigset_t ss;
|
|
int error;
|
|
|
|
ssp = NULL;
|
|
if (SCARG(uap, ss) != NULL) {
|
|
if ((error = copyin(SCARG(uap, ss), &lsss, sizeof(lsss))) != 0)
|
|
return (error);
|
|
if (lsss.ss_len != sizeof(lss))
|
|
return (EINVAL);
|
|
if (lsss.ss != NULL) {
|
|
if ((error = copyin(lsss.ss, &lss, sizeof(lss))) != 0)
|
|
return (error);
|
|
linux_to_native_sigset(&ss, &lss);
|
|
ssp = &ss;
|
|
}
|
|
}
|
|
|
|
if (SCARG(uap, timeout) != NULL) {
|
|
error = copyin(SCARG(uap, timeout), <s, sizeof(lts));
|
|
if (error != 0)
|
|
return (error);
|
|
linux_to_native_timespec(&uts, <s);
|
|
|
|
if (itimespecfix(&uts))
|
|
return (EINVAL);
|
|
|
|
nanotime(&ts0);
|
|
tsp = &uts;
|
|
} else {
|
|
tsp = NULL;
|
|
}
|
|
|
|
error = selcommon(retval, SCARG(uap, nfds), SCARG(uap, readfds),
|
|
SCARG(uap, writefds), SCARG(uap, exceptfds), tsp, ssp);
|
|
|
|
if (error == 0 && tsp != NULL) {
|
|
if (retval != 0) {
|
|
/*
|
|
* Compute how much time was left of the timeout,
|
|
* by subtracting the current time and the time
|
|
* before we started the call, and subtracting
|
|
* that result from the user-supplied value.
|
|
*/
|
|
nanotime(&ts1);
|
|
timespecsub(&ts1, &ts0, &ts1);
|
|
timespecsub(&uts, &ts1, &uts);
|
|
if (uts.tv_sec < 0)
|
|
timespecclear(&uts);
|
|
} else {
|
|
timespecclear(&uts);
|
|
}
|
|
|
|
native_to_linux_timespec(<s, &uts);
|
|
error = copyout(<s, SCARG(uap, timeout), sizeof(lts));
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_sys_ppoll(struct lwp *l,
|
|
const struct linux_sys_ppoll_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(struct pollfd *) fds;
|
|
syscallarg(u_int) nfds;
|
|
syscallarg(struct linux_timespec *) timeout;
|
|
syscallarg(linux_sigset_t *) sigset;
|
|
} */
|
|
struct linux_timespec lts0, *lts;
|
|
struct timespec ts0, *ts = NULL;
|
|
linux_sigset_t lsigmask0, *lsigmask;
|
|
sigset_t sigmask0, *sigmask = NULL;
|
|
int error;
|
|
|
|
lts = SCARG(uap, timeout);
|
|
if (lts) {
|
|
if ((error = copyin(lts, <s0, sizeof(lts0))) != 0)
|
|
return error;
|
|
linux_to_native_timespec(&ts0, <s0);
|
|
ts = &ts0;
|
|
}
|
|
|
|
lsigmask = SCARG(uap, sigset);
|
|
if (lsigmask) {
|
|
if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0))))
|
|
return error;
|
|
linux_to_native_sigset(&sigmask0, &lsigmask0);
|
|
sigmask = &sigmask0;
|
|
}
|
|
|
|
return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds),
|
|
ts, sigmask);
|
|
}
|
|
|
|
/*
|
|
* Set the 'personality' (emulation mode) for the current process. Only
|
|
* accept the Linux personality here (0). This call is needed because
|
|
* the Linux ELF crt0 issues it in an ugly kludge to make sure that
|
|
* ELF binaries run in Linux mode, not SVR4 mode.
|
|
*/
|
|
int
|
|
linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(unsigned long) per;
|
|
} */
|
|
struct linux_emuldata *led;
|
|
int per;
|
|
|
|
per = SCARG(uap, per);
|
|
led = l->l_emuldata;
|
|
if (per == LINUX_PER_QUERY) {
|
|
retval[0] = led->led_personality;
|
|
return 0;
|
|
}
|
|
|
|
switch (per & LINUX_PER_MASK) {
|
|
case LINUX_PER_LINUX:
|
|
case LINUX_PER_LINUX32:
|
|
led->led_personality = per;
|
|
break;
|
|
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
retval[0] = per;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We have nonexistent fsuid equal to uid.
|
|
* If modification is requested, refuse.
|
|
*/
|
|
int
|
|
linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(uid_t) uid;
|
|
} */
|
|
uid_t uid;
|
|
|
|
uid = SCARG(uap, uid);
|
|
if (kauth_cred_getuid(l->l_cred) != uid)
|
|
return sys_nosys(l, uap, retval);
|
|
|
|
*retval = uid;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(gid_t) gid;
|
|
} */
|
|
gid_t gid;
|
|
|
|
gid = SCARG(uap, gid);
|
|
if (kauth_cred_getgid(l->l_cred) != gid)
|
|
return sys_nosys(l, uap, retval);
|
|
|
|
*retval = gid;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(uid_t) ruid;
|
|
syscallarg(uid_t) euid;
|
|
syscallarg(uid_t) suid;
|
|
} */
|
|
|
|
/*
|
|
* Note: These checks are a little different than the NetBSD
|
|
* setreuid(2) call performs. This precisely follows the
|
|
* behavior of the Linux kernel.
|
|
*/
|
|
|
|
return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid),
|
|
SCARG(uap, suid),
|
|
ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S |
|
|
ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S |
|
|
ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S );
|
|
}
|
|
|
|
int
|
|
linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(uid_t *) ruid;
|
|
syscallarg(uid_t *) euid;
|
|
syscallarg(uid_t *) suid;
|
|
} */
|
|
kauth_cred_t pc = l->l_cred;
|
|
int error;
|
|
uid_t uid;
|
|
|
|
/*
|
|
* Linux copies these values out to userspace like so:
|
|
*
|
|
* 1. Copy out ruid.
|
|
* 2. If that succeeds, copy out euid.
|
|
* 3. If both of those succeed, copy out suid.
|
|
*/
|
|
uid = kauth_cred_getuid(pc);
|
|
if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0)
|
|
return (error);
|
|
|
|
uid = kauth_cred_geteuid(pc);
|
|
if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0)
|
|
return (error);
|
|
|
|
uid = kauth_cred_getsvuid(pc);
|
|
|
|
return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t)));
|
|
}
|
|
|
|
int
|
|
linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
i386, m68k, powerpc: T=int
|
|
alpha, amd64: T=long
|
|
syscallarg(T) request;
|
|
syscallarg(T) pid;
|
|
syscallarg(T) addr;
|
|
syscallarg(T) data;
|
|
} */
|
|
const int *ptr;
|
|
int request;
|
|
int error;
|
|
|
|
ptr = linux_ptrace_request_map;
|
|
request = SCARG(uap, request);
|
|
while (*ptr != -1)
|
|
if (*ptr++ == request) {
|
|
struct sys_ptrace_args pta;
|
|
|
|
SCARG(&pta, req) = *ptr;
|
|
SCARG(&pta, pid) = SCARG(uap, pid);
|
|
SCARG(&pta, addr) = (void *)SCARG(uap, addr);
|
|
SCARG(&pta, data) = SCARG(uap, data);
|
|
|
|
/*
|
|
* Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually
|
|
* to continue where the process left off previously.
|
|
* The same thing is achieved by addr == (void *) 1
|
|
* on NetBSD, so rewrite 'addr' appropriately.
|
|
*/
|
|
if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0)
|
|
SCARG(&pta, addr) = (void *) 1;
|
|
|
|
error = sysent[SYS_ptrace].sy_call(l, &pta, retval);
|
|
if (error)
|
|
return error;
|
|
switch (request) {
|
|
case LINUX_PTRACE_PEEKTEXT:
|
|
case LINUX_PTRACE_PEEKDATA:
|
|
error = copyout (retval,
|
|
(void *)SCARG(uap, data),
|
|
sizeof *retval);
|
|
*retval = SCARG(uap, data);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
else
|
|
ptr++;
|
|
|
|
return LINUX_SYS_PTRACE_ARCH(l, uap, retval);
|
|
}
|
|
|
|
int
|
|
linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) magic1;
|
|
syscallarg(int) magic2;
|
|
syscallarg(int) cmd;
|
|
syscallarg(void *) arg;
|
|
} */
|
|
struct sys_reboot_args /* {
|
|
syscallarg(int) opt;
|
|
syscallarg(char *) bootstr;
|
|
} */ sra;
|
|
int error;
|
|
|
|
if ((error = kauth_authorize_system(l->l_cred,
|
|
KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0)
|
|
return(error);
|
|
|
|
if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1)
|
|
return(EINVAL);
|
|
if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 &&
|
|
SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A &&
|
|
SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B)
|
|
return(EINVAL);
|
|
|
|
switch ((unsigned long)SCARG(uap, cmd)) {
|
|
case LINUX_REBOOT_CMD_RESTART:
|
|
SCARG(&sra, opt) = RB_AUTOBOOT;
|
|
break;
|
|
case LINUX_REBOOT_CMD_HALT:
|
|
SCARG(&sra, opt) = RB_HALT;
|
|
break;
|
|
case LINUX_REBOOT_CMD_POWER_OFF:
|
|
SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN;
|
|
break;
|
|
case LINUX_REBOOT_CMD_RESTART2:
|
|
/* Reboot with an argument. */
|
|
SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING;
|
|
SCARG(&sra, bootstr) = SCARG(uap, arg);
|
|
break;
|
|
case LINUX_REBOOT_CMD_CAD_ON:
|
|
return(EINVAL); /* We don't implement ctrl-alt-delete */
|
|
case LINUX_REBOOT_CMD_CAD_OFF:
|
|
return(0);
|
|
default:
|
|
return(EINVAL);
|
|
}
|
|
|
|
return(sys_reboot(l, &sra, retval));
|
|
}
|
|
|
|
/*
|
|
* Copy of compat_12_sys_swapon().
|
|
*/
|
|
int
|
|
linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) name;
|
|
} */
|
|
struct sys_swapctl_args ua;
|
|
|
|
SCARG(&ua, cmd) = SWAP_ON;
|
|
SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name));
|
|
SCARG(&ua, misc) = 0; /* priority */
|
|
return (sys_swapctl(l, &ua, retval));
|
|
}
|
|
|
|
/*
|
|
* Stop swapping to the file or block device specified by path.
|
|
*/
|
|
int
|
|
linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
} */
|
|
struct sys_swapctl_args ua;
|
|
|
|
SCARG(&ua, cmd) = SWAP_OFF;
|
|
SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/
|
|
return (sys_swapctl(l, &ua, retval));
|
|
}
|
|
|
|
/*
|
|
* Copy of compat_09_sys_setdomainname()
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(char *) domainname;
|
|
syscallarg(int) len;
|
|
} */
|
|
int name[2];
|
|
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_DOMAINNAME;
|
|
return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname),
|
|
SCARG(uap, len), l));
|
|
}
|
|
|
|
/*
|
|
* sysinfo()
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(struct linux_sysinfo *) arg;
|
|
} */
|
|
struct linux_sysinfo si;
|
|
struct loadavg *la;
|
|
|
|
si.uptime = time_uptime;
|
|
la = &averunnable;
|
|
si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
|
|
si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
|
|
si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale;
|
|
si.totalram = ctob((u_long)physmem);
|
|
si.freeram = (u_long)uvmexp.free * uvmexp.pagesize;
|
|
si.sharedram = 0; /* XXX */
|
|
si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize;
|
|
si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize;
|
|
si.freeswap =
|
|
(u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize;
|
|
si.procs = nprocs;
|
|
|
|
/* The following are only present in newer Linux kernels. */
|
|
si.totalbig = 0;
|
|
si.freebig = 0;
|
|
si.mem_unit = 1;
|
|
|
|
return (copyout(&si, SCARG(uap, arg), sizeof si));
|
|
}
|
|
|
|
int
|
|
linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) which;
|
|
# ifdef LINUX_LARGEFILE64
|
|
syscallarg(struct rlimit *) rlp;
|
|
# else
|
|
syscallarg(struct orlimit *) rlp;
|
|
# endif
|
|
} */
|
|
# ifdef LINUX_LARGEFILE64
|
|
struct rlimit orl;
|
|
# else
|
|
struct orlimit orl;
|
|
# endif
|
|
int which;
|
|
|
|
which = linux_to_bsd_limit(SCARG(uap, which));
|
|
if (which < 0)
|
|
return -which;
|
|
|
|
bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]);
|
|
|
|
return copyout(&orl, SCARG(uap, rlp), sizeof(orl));
|
|
}
|
|
|
|
int
|
|
linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) which;
|
|
# ifdef LINUX_LARGEFILE64
|
|
syscallarg(struct rlimit *) rlp;
|
|
# else
|
|
syscallarg(struct orlimit *) rlp;
|
|
# endif
|
|
} */
|
|
struct rlimit rl;
|
|
# ifdef LINUX_LARGEFILE64
|
|
struct rlimit orl;
|
|
# else
|
|
struct orlimit orl;
|
|
# endif
|
|
int error;
|
|
int which;
|
|
|
|
if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0)
|
|
return error;
|
|
|
|
which = linux_to_bsd_limit(SCARG(uap, which));
|
|
if (which < 0)
|
|
return -which;
|
|
|
|
linux_to_bsd_rlimit(&rl, &orl);
|
|
return dosetrlimit(l, l->l_proc, which, &rl);
|
|
}
|
|
|
|
# if !defined(__mips__) && !defined(__amd64__)
|
|
/* XXX: this doesn't look 100% common, at least mips doesn't have it */
|
|
int
|
|
linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval)
|
|
{
|
|
return linux_sys_getrlimit(l, (const void *)uap, retval);
|
|
}
|
|
# endif
|
|
|
|
/*
|
|
* This gets called for unsupported syscalls. The difference to sys_nosys()
|
|
* is that process does not get SIGSYS, the call just returns with ENOSYS.
|
|
* This is the way Linux does it and glibc depends on this behaviour.
|
|
*/
|
|
int
|
|
linux_sys_nosys(struct lwp *l, const void *v, register_t *retval)
|
|
{
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) which;
|
|
syscallarg(int) who;
|
|
} */
|
|
struct sys_getpriority_args bsa;
|
|
int error;
|
|
|
|
SCARG(&bsa, which) = SCARG(uap, which);
|
|
SCARG(&bsa, who) = SCARG(uap, who);
|
|
|
|
if ((error = sys_getpriority(l, &bsa, retval)))
|
|
return error;
|
|
|
|
*retval = NZERO - *retval;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_do_sys_utimensat(struct lwp *l, int fd, const char *path, struct timespec *tsp, int flags, register_t *retval)
|
|
{
|
|
int follow, error;
|
|
|
|
follow = (flags & LINUX_AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW;
|
|
|
|
if (path == NULL && fd != AT_FDCWD) {
|
|
file_t *fp;
|
|
|
|
/* fd_getvnode() will use the descriptor for us */
|
|
if ((error = fd_getvnode(fd, &fp)) != 0)
|
|
return error;
|
|
error = do_sys_utimensat(l, AT_FDCWD, fp->f_data, NULL, 0,
|
|
tsp, UIO_SYSSPACE);
|
|
fd_putfile(fd);
|
|
return error;
|
|
}
|
|
|
|
return do_sys_utimensat(l, fd, NULL, path, follow, tsp, UIO_SYSSPACE);
|
|
}
|
|
|
|
int
|
|
linux_sys_utimensat(struct lwp *l, const struct linux_sys_utimensat_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const char *) path;
|
|
syscallarg(const struct linux_timespec *) times;
|
|
syscallarg(int) flag;
|
|
} */
|
|
int error;
|
|
struct linux_timespec lts[2];
|
|
struct timespec *tsp = NULL, ts[2];
|
|
|
|
if (SCARG(uap, times)) {
|
|
error = copyin(SCARG(uap, times), <s, sizeof(lts));
|
|
if (error != 0)
|
|
return error;
|
|
linux_to_native_timespec(&ts[0], <s[0]);
|
|
linux_to_native_timespec(&ts[1], <s[1]);
|
|
tsp = ts;
|
|
}
|
|
|
|
return linux_do_sys_utimensat(l, SCARG(uap, fd), SCARG(uap, path),
|
|
tsp, SCARG(uap, flag), retval);
|
|
}
|