 @@ -1,1975 +1,1979 @@
-/*	$NetBSD: linux_misc.c,v 1.258 2023/07/28 18:19:01 christos Exp $	*/
+/*	$NetBSD: linux_misc.c,v 1.259 2023/07/29 07:00:00 rin Exp $	*/
 /*-
  * Copyright (c) 1995, 1998, 1999, 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe
  * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*
  * Linux compatibility module. Try to deal with various Linux system calls.
  */
 /*
  * These functions have been moved to multiarch to allow
  * selection of which machines include them to be
  * determined by the individual files.linux_<arch> files.
+ *
  * Function in multiarch:
  *	linux_sys_break			: linux_break.c
  *	linux_sys_alarm			: linux_misc_notalpha.c
  *	linux_sys_getresgid		: linux_misc_notalpha.c
  *	linux_sys_nice			: linux_misc_notalpha.c
  *	linux_sys_readdir		: linux_misc_notalpha.c
  *	linux_sys_setresgid		: linux_misc_notalpha.c
  *	linux_sys_time			: linux_misc_notalpha.c
  *	linux_sys_utime			: linux_misc_notalpha.c
  *	linux_sys_waitpid		: linux_misc_notalpha.c
  *	linux_sys_old_mmap		: linux_oldmmap.c
  *	linux_sys_oldolduname		: linux_oldolduname.c
  *	linux_sys_oldselect		: linux_oldselect.c
  *	linux_sys_olduname		: linux_olduname.c
  *	linux_sys_pipe			: linux_pipe.c
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.258 2023/07/28 18:19:01 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.259 2023/07/29 07:00:00 rin Exp $");
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/namei.h>
 #include <sys/proc.h>
 #include <sys/dirent.h>
 #include <sys/epoll.h>
 #include <sys/eventfd.h>
 #include <sys/file.h>
 #include <sys/stat.h>
 #include <sys/filedesc.h>
 #include <sys/ioctl.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
 #include <sys/mman.h>
 #include <sys/mount.h>
 #include <sys/poll.h>
 #include <sys/prot.h>
 #include <sys/reboot.h>
 #include <sys/resource.h>
 #include <sys/resourcevar.h>
 #include <sys/select.h>
 #include <sys/signal.h>
 #include <sys/signalvar.h>
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/times.h>
 #include <sys/vnode.h>
 #include <sys/uio.h>
 #include <sys/wait.h>
 #include <sys/utsname.h>
 #include <sys/unistd.h>
 #include <sys/vfs_syscalls.h>
 #include <sys/swap.h>		/* for SWAP_ON */
 #include <sys/sysctl.h>		/* for KERN_DOMAINNAME */
 #include <sys/kauth.h>
 #include <sys/futex.h>
 #include <sys/ptrace.h>
 #include <machine/ptrace.h>
 #include <sys/syscall.h>
 #include <sys/syscallargs.h>
 #include <compat/sys/resource.h>
 #include <compat/linux/common/linux_machdep.h>
 #include <compat/linux/common/linux_types.h>
 #include <compat/linux/common/linux_signal.h>
 #include <compat/linux/common/linux_ipc.h>
 #include <compat/linux/common/linux_sem.h>
 #include <compat/linux/common/linux_fcntl.h>
 #include <compat/linux/common/linux_mmap.h>
 #include <compat/linux/common/linux_dirent.h>
 #include <compat/linux/common/linux_util.h>
 #include <compat/linux/common/linux_misc.h>
 #include <compat/linux/common/linux_statfs.h>
 #include <compat/linux/common/linux_limit.h>
 #include <compat/linux/common/linux_ptrace.h>
 #include <compat/linux/common/linux_reboot.h>
 #include <compat/linux/common/linux_emuldata.h>
 #include <compat/linux/common/linux_sched.h>
 #include <compat/linux/linux_syscallargs.h>
 const int linux_ptrace_request_map[] = {
 	LINUX_PTRACE_TRACEME,	PT_TRACE_ME,
 	LINUX_PTRACE_PEEKTEXT,	PT_READ_I,
 	LINUX_PTRACE_PEEKDATA,	PT_READ_D,
 	LINUX_PTRACE_POKETEXT,	PT_WRITE_I,
 	LINUX_PTRACE_POKEDATA,	PT_WRITE_D,
 	LINUX_PTRACE_CONT,	PT_CONTINUE,
 	LINUX_PTRACE_KILL,	PT_KILL,
 	LINUX_PTRACE_ATTACH,	PT_ATTACH,
 	LINUX_PTRACE_DETACH,	PT_DETACH,
 # ifdef PT_STEP
 	LINUX_PTRACE_SINGLESTEP,	PT_STEP,
 # endif
 	LINUX_PTRACE_SYSCALL,	PT_SYSCALL,
 	-1
 };
 const struct linux_mnttypes linux_fstypes[] = {
 	{ MOUNT_FFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_NFS,		LINUX_NFS_SUPER_MAGIC 		},
 	{ MOUNT_MFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_MSDOS,		LINUX_MSDOS_SUPER_MAGIC		},
 	{ MOUNT_LFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_FDESC,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_NULL,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_OVERLAY,	LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_UMAP,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_KERNFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_PROCFS,		LINUX_PROC_SUPER_MAGIC		},
 	{ MOUNT_AFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_CD9660,		LINUX_ISOFS_SUPER_MAGIC		},
 	{ MOUNT_UNION,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_ADOSFS,		LINUX_ADFS_SUPER_MAGIC		},
 	{ MOUNT_EXT2FS,		LINUX_EXT2_SUPER_MAGIC		},
 	{ MOUNT_CFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_CODA,		LINUX_CODA_SUPER_MAGIC		},
 	{ MOUNT_FILECORE,	LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_NTFS,		LINUX_DEFAULT_SUPER_MAGIC	},
 	{ MOUNT_SMBFS,		LINUX_SMB_SUPER_MAGIC		},
 	{ MOUNT_PTYFS,		LINUX_DEVPTS_SUPER_MAGIC	},
 	{ MOUNT_TMPFS,		LINUX_TMPFS_SUPER_MAGIC		}
 };
 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]);
 # ifdef DEBUG_LINUX
 #define	DPRINTF(a)	uprintf a
 # else
 #define	DPRINTF(a)
 # endif
 /* Local linux_misc.c functions: */
 static void linux_to_bsd_mmap_args(struct sys_mmap_args *,
     const struct linux_sys_mmap_args *);
 static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *,
     register_t *, off_t);
 /*
  * The information on a terminated (or stopped) process needs
  * to be converted in order for Linux binaries to get a valid signal
  * number out of it.
  */
 int
 bsd_to_linux_wstat(int st)
+{
 	int sig;
 	if (WIFSIGNALED(st)) {
 		sig = WTERMSIG(st);
 		if (sig >= 0 && sig < NSIG)
 			st= (st & ~0177) | native_to_linux_signo[sig];
 	} else if (WIFSTOPPED(st)) {
 		sig = WSTOPSIG(st);
 		if (sig >= 0 && sig < NSIG)
 			st = (st & ~0xff00) |
 			    (native_to_linux_signo[sig] << 8);
+	}
 	return st;
+}
 /*
  * wait4(2).  Passed on to the NetBSD call, surrounded by code to
  * reserve some space for a NetBSD-style wait status, and converting
  * it to what Linux wants.
  */
 int
 linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) pid;
 		syscallarg(int *) status;
 		syscallarg(int) options;
 		syscallarg(struct rusage50 *) rusage;
 	} */
 	int error, status, options, linux_options, pid = SCARG(uap, pid);
 	struct rusage50 ru50;
 	struct rusage ru;
 	proc_t *p;
 	linux_options = SCARG(uap, options);
 	if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS))
 		return (EINVAL);
 	options = 0;
 	if (linux_options & LINUX_WAIT4_WNOHANG)
 		options |= WNOHANG;
 	if (linux_options & LINUX_WAIT4_WUNTRACED)
 		options |= WUNTRACED;
 	if (linux_options & LINUX_WAIT4_WCONTINUED)
 		options |= WCONTINUED;
 	if (linux_options & LINUX_WAIT4_WALL)
 		options |= WALLSIG;
 	if (linux_options & LINUX_WAIT4_WCLONE)
 		options |= WALTSIG;
 # ifdef DIAGNOSTIC
 	if (linux_options & LINUX_WAIT4_WNOTHREAD)
 		printf("WARNING: %s: linux process %d.%d called "
 		       "waitpid with __WNOTHREAD set!\n",
 		       __FILE__, l->l_proc->p_pid, l->l_lid);
 # endif
 	error = do_sys_wait(&pid, &status, options,
 	    SCARG(uap, rusage) != NULL ? &ru : NULL);
 	retval[0] = pid;
 	if (pid == 0)
 		return error;
 	p = curproc;
 	mutex_enter(p->p_lock);
 	sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */
 	mutex_exit(p->p_lock);
 	if (SCARG(uap, rusage) != NULL) {
 		rusage_to_rusage50(&ru, &ru50);
 		error = copyout(&ru, SCARG(uap, rusage), sizeof(ru));
+	}
 	if (error == 0 && SCARG(uap, status) != NULL) {
 		status = bsd_to_linux_wstat(status);
 		error = copyout(&status, SCARG(uap, status), sizeof status);
+	}
 	return error;
+}
 /*
  * Linux brk(2).  Like native, but always return the new break value.
  */
 int
 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(char *) nsize;
 	} */
 	struct proc *p = l->l_proc;
 	struct vmspace *vm = p->p_vmspace;
 	struct sys_obreak_args oba;
 	SCARG(&oba, nsize) = SCARG(uap, nsize);
 	(void) sys_obreak(l, &oba, retval);
 	retval[0] = (register_t)((char *)vm->vm_daddr + ptoa(vm->vm_dsize));
 	return 0;
+}
 /*
  * Implement the fs stat functions. Straightforward.
  */
 int
 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(const char *) path;
 		syscallarg(struct linux_statfs *) sp;
 	} */
 	struct statvfs *sb;
 	struct linux_statfs ltmp;
 	int error;
 	sb = STATVFSBUF_GET();
 	error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb);
 	if (error == 0) {
 		bsd_to_linux_statfs(sb, &ltmp);
 		error = copyout(&ltmp, SCARG(uap, sp), sizeof ltmp);
+	}
 	STATVFSBUF_PUT(sb);
 	return error;
+}
 int
 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) fd;
 		syscallarg(struct linux_statfs *) sp;
 	} */
 	struct statvfs *sb;
 	struct linux_statfs ltmp;
 	int error;
 	sb = STATVFSBUF_GET();
 	error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb);
 	if (error == 0) {
 		bsd_to_linux_statfs(sb, &ltmp);
 		error = copyout(&ltmp, SCARG(uap, sp), sizeof ltmp);
+	}
 	STATVFSBUF_PUT(sb);
 	return error;
+}
 /*
  * uname(). Just copy the info from the various strings stored in the
  * kernel, and put it in the Linux utsname structure. That structure
  * is almost the same as the NetBSD one, only it has fields 65 characters
  * long, and an extra domainname field.
  */
 int
 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(struct linux_utsname *) up;
 	} */
 	struct linux_utsname luts;
 	memset(&luts, 0, sizeof(luts));
 	strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname));
 	strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename));
 	strlcpy(luts.l_release, linux_release, sizeof(luts.l_release));
 	strlcpy(luts.l_version, linux_version, sizeof(luts.l_version));
 	strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine));
 	strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname));
 	return copyout(&luts, SCARG(uap, up), sizeof(luts));
+}
 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */
 /* Used indirectly on: arm, i386, m68k */
 /*
  * New type Linux mmap call.
  * Only called directly on machines with >= 6 free regs.
  */
 int
 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(unsigned long) addr;
 		syscallarg(size_t) len;
 		syscallarg(int) prot;
 		syscallarg(int) flags;
 		syscallarg(int) fd;
 		syscallarg(linux_off_t) offset;
 	} */
 	if (SCARG(uap, offset) & PAGE_MASK)
 		return EINVAL;
 	return linux_mmap(l, uap, retval, SCARG(uap, offset));
+}
 /*
  * Guts of most architectures' mmap64() implementations.  This shares
  * its list of arguments with linux_sys_mmap().
+ *
  * The difference in linux_sys_mmap2() is that "offset" is actually
  * (offset / pagesize), not an absolute byte count.  This translation
  * to pagesize offsets is done inside glibc between the mmap64() call
  * point, and the actual syscall.
  */
 int
 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(unsigned long) addr;
 		syscallarg(size_t) len;
 		syscallarg(int) prot;
 		syscallarg(int) flags;
 		syscallarg(int) fd;
 		syscallarg(linux_off_t) offset;
 	} */
 	return linux_mmap(l, uap, retval,
 	    ((off_t)SCARG(uap, offset)) << PAGE_SHIFT);
+}
 /*
  * Massage arguments and call system mmap(2).
  */
 static int
 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset)
+{
 	struct sys_mmap_args cma;
 	int error;
 	size_t mmoff=0;
 	linux_to_bsd_mmap_args(&cma, uap);
 	SCARG(&cma, pos) = offset;
 	if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) {
 		/*
 		 * Request for stack-like memory segment. On linux, this
 		 * works by mmap()ping (small) segment, which is automatically
 		 * extended when page fault happens below the currently
 		 * allocated area. We emulate this by allocating (typically
 		 * bigger) segment sized at current stack size limit, and
 		 * offsetting the requested and returned address accordingly.
 		 * Since physical pages are only allocated on-demand, this
 		 * is effectively identical.
 		 */
 		rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur;
 		if (SCARG(&cma, len) < ssl) {
 			/* Compute the address offset */
 			mmoff = round_page(ssl) - SCARG(uap, len);
 			if (SCARG(&cma, addr))
 				SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff;
 			SCARG(&cma, len) = (size_t) ssl;
+		}
+	}
 	error = sys_mmap(l, &cma, retval);
 	if (error)
 		return (error);
 	/* Shift the returned address for stack-like segment if necessary */
 	retval[0] += mmoff;
 	return (0);
+}
 static void
 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap)
+{
 	int flags = MAP_TRYFIXED, fl = SCARG(uap, flags);
 	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;
 		memset(&ltms, 0, sizeof(ltms));
 		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(&ltms, SCARG(uap, tms), sizeof ltms)))
 			return error;
+	}
 	getmicrouptime(&t);
 	retval[0] = ((linux_clock_t)(CONVTCK(t)));
 	return 0;
+}
 #undef CONVTCK
 #if !defined(__aarch64__)
 /*
  * 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).
 		 */
 		memset(&idb, 0, sizeof(idb));
 		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;
+}
 #endif
 #if !defined(__aarch64__)
 /*
  * 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, &ltv, sizeof(ltv))))
 			return error;
 		uts.tv_sec = ltv.tv_sec;
 		uts.tv_nsec = (long)((unsigned long)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(&ltv, timeout, sizeof(ltv))))
 			return error;
+	}
 	return 0;
+}
 #endif
 /*
  * 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), &lts, sizeof(lts));
 		if (error != 0)
 			return (error);
 		linux_to_native_timespec(&uts, &lts);
 		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(&lts, &uts);
 		error = copyout(&lts, 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, &lts0, sizeof(lts0))) != 0)
 			return error;
 		linux_to_native_timespec(&ts0, &lts0);
 		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;
 	int64_t filepg;
 	memset(&si, 0, sizeof(si));
 	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);
 	/* uvm_availmem() may sync the counters. */
 	si.freeram = (u_long)uvm_availmem(true) * uvmexp.pagesize;
 	filepg = cpu_count_get(CPU_COUNT_FILECLEAN) +
 	    cpu_count_get(CPU_COUNT_FILEDIRTY) +
 	    cpu_count_get(CPU_COUNT_FILEUNKNOWN) -
 	    cpu_count_get(CPU_COUNT_EXECPAGES);
 	si.sharedram = 0;	/* XXX */
 	si.bufferram = (u_long)(filepg * uvmexp.pagesize);
 	si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize;
 	si.freeswap =
 	    (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize;
 	si.procs = atomic_load_relaxed(&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;
 	memset(&orl, 0, sizeof(orl));
 	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(__aarch64__) && !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
 int
 linux_sys_prlimit64(struct lwp *l, const struct linux_sys_prlimit64_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(pid_t) pid;
 		syscallarg(int) witch;
 		syscallarg(struct rlimit *) new_rlp;
 		syscallarg(struct rlimit *) old_rlp;
 	}; */
 	struct rlimit rl, nrl, orl;
 	struct rlimit *p;
 	int which;
 	int error;
 	/* XXX: Cannot operate any process other than its own */
 	if (SCARG(uap, pid) != 0)
 		return EPERM;
 	which = linux_to_bsd_limit(SCARG(uap, which));
 	if (which < 0)
 		return -which;
 	p = SCARG(uap, old_rlp);
 	if (p != NULL) {
 		memset(&orl, 0, sizeof(orl));
 		bsd_to_linux_rlimit64(&orl, &l->l_proc->p_rlimit[which]);
 		if ((error = copyout(&orl, p, sizeof(orl))) != 0)
 			return error;
+	}
 	p = SCARG(uap, new_rlp);
 	if (p != NULL) {
 		if ((error = copyin(p, &nrl, sizeof(nrl))) != 0)
 			return error;
 		linux_to_bsd_rlimit(&rl, &nrl);
 		return dosetrlimit(l, l->l_proc, which, &rl);
+	}
 	return 0;
+}
 /*
  * 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), &lts, sizeof(lts));
 		if (error != 0)
 			return error;
 		linux_to_native_timespec(&ts[0], &lts[0]);
 		linux_to_native_timespec(&ts[1], &lts[1]);
 		tsp = ts;
+	}
 	return linux_do_sys_utimensat(l, SCARG(uap, fd), SCARG(uap, path),
 	    tsp, SCARG(uap, flag), retval);
+}
 int
 linux_sys_futex(struct lwp *l, const struct linux_sys_futex_args *uap,
 	register_t *retval)
+{
 	/* {
 		syscallarg(int *) uaddr;
 		syscallarg(int) op;
 		syscallarg(int) val;
 		syscallarg(const struct linux_timespec *) timeout;
 		syscallarg(int *) uaddr2;
 		syscallarg(int) val3;
 	} */
 	struct linux_timespec lts;
 	struct timespec ts, *tsp = NULL;
 	int val2 = 0;
 	int error;
 	/*
 	 * Linux overlays the "timeout" field and the "val2" field.
 	 * "timeout" is only valid for FUTEX_WAIT and FUTEX_WAIT_BITSET
 	 * on Linux.
 	 */
 	const int op = (SCARG(uap, op) & FUTEX_CMD_MASK);
 	if ((op == FUTEX_WAIT || op == FUTEX_WAIT_BITSET) &&
 	    SCARG(uap, timeout) != NULL) {
 		if ((error = copyin(SCARG(uap, timeout),
 		    &lts, sizeof(lts))) != 0) {
 			return error;
+		}
 		linux_to_native_timespec(&ts, &lts);
 		tsp = &ts;
 	} else {
 		val2 = (int)(uintptr_t)SCARG(uap, timeout);
+	}
 	return linux_do_futex(SCARG(uap, uaddr), SCARG(uap, op),
 	    SCARG(uap, val), tsp, SCARG(uap, uaddr2), val2,
 	    SCARG(uap, val3), retval);
+}
 int
 linux_do_futex(int *uaddr, int op, int val, struct timespec *timeout,
     int *uaddr2, int val2, int val3, register_t *retval)
+{
 	/*
 	 * Always clear FUTEX_PRIVATE_FLAG for Linux processes.
 	 * NetBSD-native futexes exist in different namespace
 	 * depending on FUTEX_PRIVATE_FLAG.  This appears not
 	 * to be the case in Linux, and some futex users will
 	 * mix private and non-private ops on the same futex
 	 * object.
 	 */
 	return do_futex(uaddr, op & ~FUTEX_PRIVATE_FLAG,
 			val, timeout, uaddr2, val2, val3, retval);
+}
 #define	LINUX_EFD_SEMAPHORE	0x0001
 #define	LINUX_EFD_CLOEXEC	LINUX_O_CLOEXEC
 #define	LINUX_EFD_NONBLOCK	LINUX_O_NONBLOCK
 static int
 linux_do_eventfd2(struct lwp *l, unsigned int initval, int flags,
     register_t *retval)
+{
 	int nflags = 0;
 	if (flags & ~(LINUX_EFD_SEMAPHORE | LINUX_EFD_CLOEXEC |
 		      LINUX_EFD_NONBLOCK)) {
 		return EINVAL;
+	}
 	if (flags & LINUX_EFD_SEMAPHORE) {
 		nflags |= EFD_SEMAPHORE;
+	}
 	if (flags & LINUX_EFD_CLOEXEC) {
 		nflags |= EFD_CLOEXEC;
+	}
 	if (flags & LINUX_EFD_NONBLOCK) {
 		nflags |= EFD_NONBLOCK;
+	}
 	return do_eventfd(l, initval, nflags, retval);
+}
 int
 linux_sys_eventfd(struct lwp *l, const struct linux_sys_eventfd_args *uap,
     register_t *retval)
+{
 	/* {
 		syscallarg(unsigned int) initval;
 	} */
 	return linux_do_eventfd2(l, SCARG(uap, initval), 0, retval);
+}
 int
 linux_sys_eventfd2(struct lwp *l, const struct linux_sys_eventfd2_args *uap,
     register_t *retval)
+{
 	/* {
 		syscallarg(unsigned int) initval;
 		syscallarg(int) flags;
 	} */
 	return linux_do_eventfd2(l, SCARG(uap, initval), SCARG(uap, flags),
 				 retval);
+}
 #ifndef __aarch64__
 /*
  * epoll_create(2).  Check size and call sys_epoll_create1.
  */
 int
 linux_sys_epoll_create(struct lwp *l,
     const struct linux_sys_epoll_create_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) size;
 	} */
 	struct sys_epoll_create1_args ca;
 	/*
 	 * SCARG(uap, size) is unused.  Linux just tests it and then
 	 * forgets it as well.
 	 */
 	if (SCARG(uap, size) <= 0)
 		return EINVAL;
 	SCARG(&ca, flags) = 0;
 	return sys_epoll_create1(l, &ca, retval);
+}
 #endif /* !__aarch64__ */
 /*
  * epoll_create1(2).  Translate the flags and call sys_epoll_create1.
  */
 int
 linux_sys_epoll_create1(struct lwp *l,
     const struct linux_sys_epoll_create1_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) flags;
 	} */
 	struct sys_epoll_create1_args ca;
         if ((SCARG(uap, flags) & ~(LINUX_O_CLOEXEC)) != 0)
 		return EINVAL;
 	SCARG(&ca, flags) = 0;
 	if ((SCARG(uap, flags) & LINUX_O_CLOEXEC) != 0)
 		SCARG(&ca, flags) |= O_CLOEXEC;
 	return sys_epoll_create1(l, &ca, retval);
+}
 /*
  * epoll_ctl(2).  Copyin event and translate it if necessary and then
  * call epoll_ctl_common().
  */
 int
 linux_sys_epoll_ctl(struct lwp *l, const struct linux_sys_epoll_ctl_args *uap,
     register_t *retval)
+{
 	/* {
 		syscallarg(int) epfd;
 		syscallarg(int) op;
 		syscallarg(int) fd;
 		syscallarg(struct linux_epoll_event *) event;
 	} */
 	struct linux_epoll_event lee;
 	struct epoll_event ee;
 	struct epoll_event *eep;
 	int error;
 	if (SCARG(uap, op) != EPOLL_CTL_DEL) {
 		error = copyin(SCARG(uap, event), &lee, sizeof(lee));
 		if (error != 0)
 			return error;
 		/*
 		 * On some architectures, struct linux_epoll_event and
 		 * struct epoll_event are packed differently... but otherwise
 		 * the contents are the same.
 		 */
 		ee.events = lee.events;
 		ee.data = lee.data;
 		eep = &ee;
 	} else
 		eep = NULL;
 	return epoll_ctl_common(l, retval, SCARG(uap, epfd), SCARG(uap, op),
 	    SCARG(uap, fd), eep);
+}
 #ifndef __aarch64__
 /*
  * epoll_wait(2).  Call sys_epoll_pwait().
  */
 int
 linux_sys_epoll_wait(struct lwp *l,
     const struct linux_sys_epoll_wait_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) epfd;
 		syscallarg(struct linux_epoll_event *) events;
 		syscallarg(int) maxevents;
 		syscallarg(int) timeout;
 	} */
 	struct linux_sys_epoll_pwait_args ea;
 	SCARG(&ea, epfd) = SCARG(uap, epfd);
 	SCARG(&ea, events) = SCARG(uap, events);
 	SCARG(&ea, maxevents) = SCARG(uap, maxevents);
 	SCARG(&ea, timeout) = SCARG(uap, timeout);
 	SCARG(&ea, sigmask) = NULL;
 	return linux_sys_epoll_pwait(l, &ea, retval);
+}
 #endif /* !__aarch64__ */
 /*
  * Main body of epoll_pwait2(2).  Translate timeout and sigmask and
  * call epoll_wait_common.
  */
 static int
 linux_epoll_pwait2_common(struct lwp *l, register_t *retval, int epfd,
     struct linux_epoll_event *events, int maxevents,
     struct linux_timespec *timeout, const linux_sigset_t *sigmask)
+{
 	struct timespec ts, *tsp;
 	linux_sigset_t lss;
 	sigset_t ss, *ssp;
 	struct epoll_event *eep;
 	struct linux_epoll_event *leep;
 	int i, error;
 	if (maxevents <= 0 || maxevents > EPOLL_MAX_EVENTS)
 		return EINVAL;
 	if (timeout != NULL) {
 		linux_to_native_timespec(&ts, timeout);
 		tsp = &ts;
 	} else
 		tsp = NULL;
 	if (sigmask != NULL) {
 		error = copyin(sigmask, &lss, sizeof(lss));
 		if (error != 0)
 			return error;
 		linux_to_native_sigset(&ss, &lss);
 		ssp = &ss;
 	} else
 		ssp = NULL;
 	eep = kmem_alloc(maxevents * sizeof(*eep), KM_SLEEP);
 	error = epoll_wait_common(l, retval, epfd, eep, maxevents, tsp,
 	    ssp);
 	if (error == 0 && *retval > 0) {
 		leep = kmem_alloc((*retval) * sizeof(*leep), KM_SLEEP);
 		/* Translate the events (because of packing). */
 		for (i = 0; i < *retval; i++) {
 			leep[i].events = eep[i].events;
 			leep[i].data = eep[i].data;
+		}
 		error = copyout(leep, events, (*retval) * sizeof(*leep));
 		kmem_free(leep, (*retval) * sizeof(*leep));
+	}
 	kmem_free(eep, maxevents * sizeof(*eep));
 	return error;
+}
 /*
  * epoll_pwait(2).  Translate timeout and call sys_epoll_pwait2.
  */
 int
 linux_sys_epoll_pwait(struct lwp *l,
     const struct linux_sys_epoll_pwait_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) epfd;
 		syscallarg(struct linux_epoll_event *) events;
 		syscallarg(int) maxevents;
 		syscallarg(int) timeout;
 		syscallarg(linux_sigset_t *) sigmask;
 	} */
         struct linux_timespec lts, *ltsp;
 	const int timeout = SCARG(uap, timeout);
 	if (timeout >= 0) {
 		/* Convert from milliseconds to timespec. */
 		lts.tv_sec = timeout / 1000;
 		lts.tv_nsec = (timeout % 1000) * 1000000;
 	        ltsp = &lts;
 	} else
 		ltsp = NULL;
 	return linux_epoll_pwait2_common(l, retval, SCARG(uap, epfd),
 	    SCARG(uap, events), SCARG(uap, maxevents), ltsp,
 	    SCARG(uap, sigmask));
+}
 /*
  * epoll_pwait2(2).  Copyin timeout and call linux_epoll_pwait2_common().
  */
 int
 linux_sys_epoll_pwait2(struct lwp *l,
     const struct linux_sys_epoll_pwait2_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(int) epfd;
 		syscallarg(struct linux_epoll_event *) events;
 		syscallarg(int) maxevents;
 	        syscallarg(struct linux_timespec *) timeout;
 		syscallarg(linux_sigset_t *) sigmask;
 	} */
 	struct linux_timespec lts, *ltsp;
 	int error;
 	if (SCARG(uap, timeout) != NULL) {
 		error = copyin(SCARG(uap, timeout), &lts, sizeof(lts));
 		if (error != 0)
 			return error;
 		ltsp = &lts;
 	} else
 		ltsp = NULL;
 	return linux_epoll_pwait2_common(l, retval, SCARG(uap, epfd),
 	    SCARG(uap, events), SCARG(uap, maxevents), ltsp,
 	    SCARG(uap, sigmask));
+}
 #define	LINUX_MFD_CLOEXEC	0x0001U
 #define	LINUX_MFD_ALLOW_SEALING	0x0002U
 #define	LINUX_MFD_HUGETLB	0x0004U
 #define	LINUX_MFD_NOEXEC_SEAL	0x0008U
 #define	LINUX_MFD_EXEC		0x0010U
 #define	LINUX_MFD_HUGE_FLAGS	(0x3f << 26)
 #define	LINUX_MFD_ALL_FLAGS	(LINUX_MFD_CLOEXEC|LINUX_MFD_ALLOW_SEALING \
 				|LINUX_MFD_HUGETLB|LINUX_MFD_NOEXEC_SEAL \
 				|LINUX_MFD_EXEC|LINUX_MFD_HUGE_FLAGS)
 #define	LINUX_MFD_KNOWN_FLAGS	(LINUX_MFD_CLOEXEC|LINUX_MFD_ALLOW_SEALING)
 #define LINUX_MFD_NAME_MAX	249
 /*
  * memfd_create(2).  Do some error checking and then call NetBSD's
  * version.
  */
 int
 linux_sys_memfd_create(struct lwp *l,
     const struct linux_sys_memfd_create_args *uap, register_t *retval)
+{
 	/* {
 		syscallarg(const char *) name;
 		syscallarg(unsigned int) flags;
 	} */
 	int error;
 	char *pbuf;
 	struct sys_memfd_create_args muap;
 	const unsigned int lflags = SCARG(uap, flags);
 	KASSERT(LINUX_MFD_NAME_MAX < NAME_MAX); /* sanity check */
 	if (lflags & ~LINUX_MFD_ALL_FLAGS)
 		return EINVAL;
 	if ((lflags & LINUX_MFD_HUGE_FLAGS) != 0 &&
 	    (lflags & LINUX_MFD_HUGETLB) == 0)
 		return EINVAL;
 	if ((lflags & LINUX_MFD_HUGETLB) && (lflags & LINUX_MFD_ALLOW_SEALING))
 		return EINVAL;
 	/* Linux has a stricter limit for name size */
 	pbuf = PNBUF_GET();
 	error = copyinstr(SCARG(uap, name), pbuf, LINUX_MFD_NAME_MAX+1, NULL);
 	PNBUF_PUT(pbuf);
 	pbuf = NULL;
 	if (error != 0) {
 		if (error == ENAMETOOLONG)
 			error = EINVAL;
 		return error;
+	}
 	if (lflags & ~LINUX_MFD_KNOWN_FLAGS) {
 		DPRINTF(("linux_sys_memfd_create: ignored flags %x\n",
 		    lflags & ~LINUX_MFD_KNOWN_FLAGS));
+	}
 	SCARG(&muap, name) = SCARG(uap, name);
 	SCARG(&muap, flags) = lflags & LINUX_MFD_KNOWN_FLAGS;
 	return sys_memfd_create(l, &muap, retval);
+}