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	Index: stable/8/sys/amd64/include/xen
	===================================================================
	--- stable/8/sys/amd64/include/xen (revision 219190)
	+++ stable/8/sys/amd64/include/xen (revision 219191)

	Property changes on: stable/8/sys/amd64/include/xen
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/amd64/include/xen:r218612
	Index: stable/8/sys/amd64/linux32/linux32_machdep.c
	===================================================================
	--- stable/8/sys/amd64/linux32/linux32_machdep.c (revision 219190)
	+++ stable/8/sys/amd64/linux32/linux32_machdep.c (revision 219191)
	@@ -1,1312 +1,1318 @@
	/*-
	* Copyright (c) 2004 Tim J. Robbins
	* Copyright (c) 2002 Doug Rabson
	* Copyright (c) 2000 Marcel Moolenaar
	* All rights reserved.
	*
	* 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
	* in this position and unchanged.
	* 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.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
	*/

	#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");

	#include <sys/param.h>
	#include <sys/kernel.h>
	#include <sys/systm.h>
	#include <sys/file.h>
	#include <sys/fcntl.h>
	#include <sys/clock.h>
	#include <sys/imgact.h>
	#include <sys/limits.h>
	#include <sys/lock.h>
	#include <sys/malloc.h>
	#include <sys/mman.h>
	#include <sys/mutex.h>
	#include <sys/priv.h>
	#include <sys/proc.h>
	#include <sys/resource.h>
	#include <sys/resourcevar.h>
	#include <sys/sched.h>
	#include <sys/syscallsubr.h>
	#include <sys/sysproto.h>
	#include <sys/unistd.h>
	#include <sys/wait.h>

	#include <machine/frame.h>
	#include <machine/pcb.h>
	#include <machine/psl.h>
	#include <machine/segments.h>
	#include <machine/specialreg.h>

	#include <vm/vm.h>
	#include <vm/pmap.h>
	#include <vm/vm_map.h>

	#include <compat/freebsd32/freebsd32_util.h>
	#include <amd64/linux32/linux.h>
	#include <amd64/linux32/linux32_proto.h>
	#include <compat/linux/linux_ipc.h>
	#include <compat/linux/linux_misc.h>
	#include <compat/linux/linux_signal.h>
	#include <compat/linux/linux_util.h>
	#include <compat/linux/linux_emul.h>

	struct l_old_select_argv {
	l_int nfds;
	l_uintptr_t readfds;
	l_uintptr_t writefds;
	l_uintptr_t exceptfds;
	l_uintptr_t timeout;
	} __packed;

	int
	linux_to_bsd_sigaltstack(int lsa)
	{
	int bsa = 0;

	if (lsa & LINUX_SS_DISABLE)
	bsa \|= SS_DISABLE;
	if (lsa & LINUX_SS_ONSTACK)
	bsa \|= SS_ONSTACK;
	return (bsa);
	}

	static int linux_mmap_common(struct thread *td, l_uintptr_t addr,
	l_size_t len, l_int prot, l_int flags, l_int fd,
	l_loff_t pos);

	int
	bsd_to_linux_sigaltstack(int bsa)
	{
	int lsa = 0;

	if (bsa & SS_DISABLE)
	lsa \|= LINUX_SS_DISABLE;
	if (bsa & SS_ONSTACK)
	lsa \|= LINUX_SS_ONSTACK;
	return (lsa);
	}

	static void
	bsd_to_linux_rusage(struct rusage ru, struct l_rusage lru)
	{

	lru->ru_utime.tv_sec = ru->ru_utime.tv_sec;
	lru->ru_utime.tv_usec = ru->ru_utime.tv_usec;
	lru->ru_stime.tv_sec = ru->ru_stime.tv_sec;
	lru->ru_stime.tv_usec = ru->ru_stime.tv_usec;
	lru->ru_maxrss = ru->ru_maxrss;
	lru->ru_ixrss = ru->ru_ixrss;
	lru->ru_idrss = ru->ru_idrss;
	lru->ru_isrss = ru->ru_isrss;
	lru->ru_minflt = ru->ru_minflt;
	lru->ru_majflt = ru->ru_majflt;
	lru->ru_nswap = ru->ru_nswap;
	lru->ru_inblock = ru->ru_inblock;
	lru->ru_oublock = ru->ru_oublock;
	lru->ru_msgsnd = ru->ru_msgsnd;
	lru->ru_msgrcv = ru->ru_msgrcv;
	lru->ru_nsignals = ru->ru_nsignals;
	lru->ru_nvcsw = ru->ru_nvcsw;
	lru->ru_nivcsw = ru->ru_nivcsw;
	}

	int
	linux_execve(struct thread td, struct linux_execve_args args)
	{
	struct image_args eargs;
	char *path;
	int error;

	LCONVPATHEXIST(td, args->path, &path);

	#ifdef DEBUG
	if (ldebug(execve))
	printf(ARGS(execve, "%s"), path);
	#endif

	error = freebsd32_exec_copyin_args(&eargs, path, UIO_SYSSPACE,
	args->argp, args->envp);
	free(path, M_TEMP);
	if (error == 0)
	error = kern_execve(td, &eargs, NULL);
	if (error == 0)
	/* Linux process can execute FreeBSD one, do not attempt
	* to create emuldata for such process using
	* linux_proc_init, this leads to a panic on KASSERT
	* because such process has p->p_emuldata == NULL.
	*/
	if (SV_PROC_ABI(td->td_proc) == SV_ABI_LINUX)
	error = linux_proc_init(td, 0, 0);
	return (error);
	}

	CTASSERT(sizeof(struct l_iovec32) == 8);

	static int
	linux32_copyinuio(struct l_iovec32 iovp, l_ulong iovcnt, struct uio *uiop)
	{
	struct l_iovec32 iov32;
	struct iovec *iov;
	struct uio *uio;
	uint32_t iovlen;
	int error, i;

	*uiop = NULL;
	if (iovcnt > UIO_MAXIOV)
	return (EINVAL);
	iovlen = iovcnt * sizeof(struct iovec);
	uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK);
	iov = (struct iovec *)(uio + 1);
	for (i = 0; i < iovcnt; i++) {
	error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32));
	if (error) {
	free(uio, M_IOV);
	return (error);
	}
	iov[i].iov_base = PTRIN(iov32.iov_base);
	iov[i].iov_len = iov32.iov_len;
	}
	uio->uio_iov = iov;
	uio->uio_iovcnt = iovcnt;
	uio->uio_segflg = UIO_USERSPACE;
	uio->uio_offset = -1;
	uio->uio_resid = 0;
	for (i = 0; i < iovcnt; i++) {
	if (iov->iov_len > INT_MAX - uio->uio_resid) {
	free(uio, M_IOV);
	return (EINVAL);
	}
	uio->uio_resid += iov->iov_len;
	iov++;
	}
	*uiop = uio;
	return (0);
	}

	int
	linux32_copyiniov(struct l_iovec32 iovp32, l_ulong iovcnt, struct iovec *iovp,
	int error)
	{
	struct l_iovec32 iov32;
	struct iovec *iov;
	uint32_t iovlen;
	int i;

	*iovp = NULL;
	if (iovcnt > UIO_MAXIOV)
	return (error);
	iovlen = iovcnt * sizeof(struct iovec);
	iov = malloc(iovlen, M_IOV, M_WAITOK);
	for (i = 0; i < iovcnt; i++) {
	error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32));
	if (error) {
	free(iov, M_IOV);
	return (error);
	}
	iov[i].iov_base = PTRIN(iov32.iov_base);
	iov[i].iov_len = iov32.iov_len;
	}
	*iovp = iov;
	return(0);

	}

	int
	linux_readv(struct thread td, struct linux_readv_args uap)
	{
	struct uio *auio;
	int error;

	error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
	if (error)
	return (error);
	error = kern_readv(td, uap->fd, auio);
	free(auio, M_IOV);
	return (error);
	}

	int
	linux_writev(struct thread td, struct linux_writev_args uap)
	{
	struct uio *auio;
	int error;

	error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
	if (error)
	return (error);
	error = kern_writev(td, uap->fd, auio);
	free(auio, M_IOV);
	return (error);
	}

	struct l_ipc_kludge {
	l_uintptr_t msgp;
	l_long msgtyp;
	} __packed;

	int
	linux_ipc(struct thread td, struct linux_ipc_args args)
	{

	switch (args->what & 0xFFFF) {
	case LINUX_SEMOP: {
	struct linux_semop_args a;

	a.semid = args->arg1;
	a.tsops = args->ptr;
	a.nsops = args->arg2;
	return (linux_semop(td, &a));
	}
	case LINUX_SEMGET: {
	struct linux_semget_args a;

	a.key = args->arg1;
	a.nsems = args->arg2;
	a.semflg = args->arg3;
	return (linux_semget(td, &a));
	}
	case LINUX_SEMCTL: {
	struct linux_semctl_args a;
	int error;

	a.semid = args->arg1;
	a.semnum = args->arg2;
	a.cmd = args->arg3;
	error = copyin(args->ptr, &a.arg, sizeof(a.arg));
	if (error)
	return (error);
	return (linux_semctl(td, &a));
	}
	case LINUX_MSGSND: {
	struct linux_msgsnd_args a;

	a.msqid = args->arg1;
	a.msgp = args->ptr;
	a.msgsz = args->arg2;
	a.msgflg = args->arg3;
	return (linux_msgsnd(td, &a));
	}
	case LINUX_MSGRCV: {
	struct linux_msgrcv_args a;

	a.msqid = args->arg1;
	a.msgsz = args->arg2;
	a.msgflg = args->arg3;
	if ((args->what >> 16) == 0) {
	struct l_ipc_kludge tmp;
	int error;

	if (args->ptr == 0)
	return (EINVAL);
	error = copyin(args->ptr, &tmp, sizeof(tmp));
	if (error)
	return (error);
	a.msgp = PTRIN(tmp.msgp);
	a.msgtyp = tmp.msgtyp;
	} else {
	a.msgp = args->ptr;
	a.msgtyp = args->arg5;
	}
	return (linux_msgrcv(td, &a));
	}
	case LINUX_MSGGET: {
	struct linux_msgget_args a;

	a.key = args->arg1;
	a.msgflg = args->arg2;
	return (linux_msgget(td, &a));
	}
	case LINUX_MSGCTL: {
	struct linux_msgctl_args a;

	a.msqid = args->arg1;
	a.cmd = args->arg2;
	a.buf = args->ptr;
	return (linux_msgctl(td, &a));
	}
	case LINUX_SHMAT: {
	struct linux_shmat_args a;

	a.shmid = args->arg1;
	a.shmaddr = args->ptr;
	a.shmflg = args->arg2;
	a.raddr = PTRIN((l_uint)args->arg3);
	return (linux_shmat(td, &a));
	}
	case LINUX_SHMDT: {
	struct linux_shmdt_args a;

	a.shmaddr = args->ptr;
	return (linux_shmdt(td, &a));
	}
	case LINUX_SHMGET: {
	struct linux_shmget_args a;

	a.key = args->arg1;
	a.size = args->arg2;
	a.shmflg = args->arg3;
	return (linux_shmget(td, &a));
	}
	case LINUX_SHMCTL: {
	struct linux_shmctl_args a;

	a.shmid = args->arg1;
	a.cmd = args->arg2;
	a.buf = args->ptr;
	return (linux_shmctl(td, &a));
	}
	default:
	break;
	}

	return (EINVAL);
	}

	int
	linux_old_select(struct thread td, struct linux_old_select_args args)
	{
	struct l_old_select_argv linux_args;
	struct linux_select_args newsel;
	int error;

	#ifdef DEBUG
	if (ldebug(old_select))
	printf(ARGS(old_select, "%p"), args->ptr);
	#endif

	error = copyin(args->ptr, &linux_args, sizeof(linux_args));
	if (error)
	return (error);

	newsel.nfds = linux_args.nfds;
	newsel.readfds = PTRIN(linux_args.readfds);
	newsel.writefds = PTRIN(linux_args.writefds);
	newsel.exceptfds = PTRIN(linux_args.exceptfds);
	newsel.timeout = PTRIN(linux_args.timeout);
	return (linux_select(td, &newsel));
	}

	int
	linux_fork(struct thread td, struct linux_fork_args args)
	{
	int error;
	struct proc *p2;
	struct thread *td2;

	#ifdef DEBUG
	if (ldebug(fork))
	printf(ARGS(fork, ""));
	#endif

	if ((error = fork1(td, RFFDG \| RFPROC \| RFSTOPPED, 0, &p2)) != 0)
	return (error);

	if (error == 0) {
	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;
	}

	if (td->td_retval[1] == 1)
	td->td_retval[0] = 0;
	error = linux_proc_init(td, td->td_retval[0], 0);
	if (error)
	return (error);

	td2 = FIRST_THREAD_IN_PROC(p2);

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	return (0);
	}

	int
	linux_vfork(struct thread td, struct linux_vfork_args args)
	{
	int error;
	struct proc *p2;
	struct thread *td2;

	#ifdef DEBUG
	if (ldebug(vfork))
	printf(ARGS(vfork, ""));
	#endif

	/* Exclude RFPPWAIT */
	if ((error = fork1(td, RFFDG \| RFPROC \| RFMEM \| RFSTOPPED, 0, &p2)) != 0)
	return (error);
	if (error == 0) {
	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;
	}
	/* Are we the child? */
	if (td->td_retval[1] == 1)
	td->td_retval[0] = 0;
	error = linux_proc_init(td, td->td_retval[0], 0);
	if (error)
	return (error);

	PROC_LOCK(p2);
	p2->p_flag \|= P_PPWAIT;
	PROC_UNLOCK(p2);

	td2 = FIRST_THREAD_IN_PROC(p2);

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	/* wait for the children to exit, ie. emulate vfork */
	PROC_LOCK(p2);
	while (p2->p_flag & P_PPWAIT)
	cv_wait(&p2->p_pwait, &p2->p_mtx);
	PROC_UNLOCK(p2);

	return (0);
	}

	+static int
	+linux_set_cloned_tls(struct thread td, void desc)
	+{
	+ struct user_segment_descriptor sd;
	+ struct l_user_desc info;
	+ struct pcb *pcb;
	+ int error;
	+ int a[2];
	+
	+ error = copyin(desc, &info, sizeof(struct l_user_desc));
	+ if (error) {
	+ printf(LMSG("copyin failed!"));
	+ } else {
	+ /* We might copy out the entry_number as GUGS32_SEL. */
	+ info.entry_number = GUGS32_SEL;
	+ error = copyout(&info, desc, sizeof(struct l_user_desc));
	+ if (error)
	+ printf(LMSG("copyout failed!"));
	+
	+ a[0] = LINUX_LDT_entry_a(&info);
	+ a[1] = LINUX_LDT_entry_b(&info);
	+
	+ memcpy(&sd, &a, sizeof(a));
	+#ifdef DEBUG
	+ if (ldebug(clone))
	+ printf("Segment created in clone with "
	+ "CLONE_SETTLS: lobase: %x, hibase: %x, "
	+ "lolimit: %x, hilimit: %x, type: %i, "
	+ "dpl: %i, p: %i, xx: %i, long: %i, "
	+ "def32: %i, gran: %i\n", sd.sd_lobase,
	+ sd.sd_hibase, sd.sd_lolimit, sd.sd_hilimit,
	+ sd.sd_type, sd.sd_dpl, sd.sd_p, sd.sd_xx,
	+ sd.sd_long, sd.sd_def32, sd.sd_gran);
	+#endif
	+ pcb = td->td_pcb;
	+ pcb->pcb_gsbase = (register_t)info.base_addr;
	+/* XXXKIB pcb->pcb_gs32sd = sd; */
	+ td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL);
	+ set_pcb_flags(pcb, PCB_GS32BIT \| PCB_32BIT);
	+ }
	+
	+ return (error);
	+}
	+
	int
	linux_clone(struct thread td, struct linux_clone_args args)
	{
	int error, ff = RFPROC \| RFSTOPPED;
	struct proc *p2;
	struct thread *td2;
	int exit_signal;
	struct linux_emuldata *em;

	#ifdef DEBUG
	if (ldebug(clone)) {
	printf(ARGS(clone, "flags %x, stack %p, parent tid: %p, "
	"child tid: %p"), (unsigned)args->flags,
	args->stack, args->parent_tidptr, args->child_tidptr);
	}
	#endif

	exit_signal = args->flags & 0x000000ff;
	if (LINUX_SIG_VALID(exit_signal)) {
	if (exit_signal <= LINUX_SIGTBLSZ)
	exit_signal =
	linux_to_bsd_signal[_SIG_IDX(exit_signal)];
	} else if (exit_signal != 0)
	return (EINVAL);

	if (args->flags & LINUX_CLONE_VM)
	ff \|= RFMEM;
	if (args->flags & LINUX_CLONE_SIGHAND)
	ff \|= RFSIGSHARE;
	/*
	* XXX: In Linux, sharing of fs info (chroot/cwd/umask)
	* and open files is independant. In FreeBSD, its in one
	* structure but in reality it does not cause any problems
	* because both of these flags are usually set together.
	*/
	if (!(args->flags & (LINUX_CLONE_FILES \| LINUX_CLONE_FS)))
	ff \|= RFFDG;

	/*
	* Attempt to detect when linux_clone(2) is used for creating
	* kernel threads. Unfortunately despite the existence of the
	* CLONE_THREAD flag, version of linuxthreads package used in
	* most popular distros as of beginning of 2005 doesn't make
	* any use of it. Therefore, this detection relies on
	* empirical observation that linuxthreads sets certain
	* combination of flags, so that we can make more or less
	* precise detection and notify the FreeBSD kernel that several
	* processes are in fact part of the same threading group, so
	* that special treatment is necessary for signal delivery
	* between those processes and fd locking.
	*/
	if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
	ff \|= RFTHREAD;

	if (args->flags & LINUX_CLONE_PARENT_SETTID)
	if (args->parent_tidptr == NULL)
	return (EINVAL);

	error = fork1(td, ff, 0, &p2);
	if (error)
	return (error);

	if (args->flags & (LINUX_CLONE_PARENT \| LINUX_CLONE_THREAD)) {
	sx_xlock(&proctree_lock);
	PROC_LOCK(p2);
	proc_reparent(p2, td->td_proc->p_pptr);
	PROC_UNLOCK(p2);
	sx_xunlock(&proctree_lock);
	}

	/* create the emuldata */
	error = linux_proc_init(td, p2->p_pid, args->flags);
	/* reference it - no need to check this */
	em = em_find(p2, EMUL_DOLOCK);
	KASSERT(em != NULL, ("clone: emuldata not found.\n"));
	/* and adjust it */

	if (args->flags & LINUX_CLONE_THREAD) {
	#ifdef notyet
	PROC_LOCK(p2);
	p2->p_pgrp = td->td_proc->p_pgrp;
	PROC_UNLOCK(p2);
	#endif
	exit_signal = 0;
	}

	if (args->flags & LINUX_CLONE_CHILD_SETTID)
	em->child_set_tid = args->child_tidptr;
	else
	em->child_set_tid = NULL;

	if (args->flags & LINUX_CLONE_CHILD_CLEARTID)
	em->child_clear_tid = args->child_tidptr;
	else
	em->child_clear_tid = NULL;

	EMUL_UNLOCK(&emul_lock);

	if (args->flags & LINUX_CLONE_PARENT_SETTID) {
	error = copyout(&p2->p_pid, args->parent_tidptr,
	sizeof(p2->p_pid));
	if (error)
	printf(LMSG("copyout failed!"));
	}

	PROC_LOCK(p2);
	p2->p_sigparent = exit_signal;
	PROC_UNLOCK(p2);
	td2 = FIRST_THREAD_IN_PROC(p2);
	/*
	* In a case of stack = NULL, we are supposed to COW calling process
	* stack. This is what normal fork() does, so we just keep tf_rsp arg
	* intact.
	*/
	if (args->stack)
	td2->td_frame->tf_rsp = PTROUT(args->stack);

	- if (args->flags & LINUX_CLONE_SETTLS) {
	- struct user_segment_descriptor sd;
	- struct l_user_desc info;
	- struct pcb *pcb;
	- int a[2];
	-
	- error = copyin((void *)td->td_frame->tf_rsi, &info,
	- sizeof(struct l_user_desc));
	- if (error) {
	- printf(LMSG("copyin failed!"));
	- } else {
	- /* We might copy out the entry_number as GUGS32_SEL. */
	- info.entry_number = GUGS32_SEL;
	- error = copyout(&info, (void *)td->td_frame->tf_rsi,
	- sizeof(struct l_user_desc));
	- if (error)
	- printf(LMSG("copyout failed!"));
	-
	- a[0] = LINUX_LDT_entry_a(&info);
	- a[1] = LINUX_LDT_entry_b(&info);
	-
	- memcpy(&sd, &a, sizeof(a));
	-#ifdef DEBUG
	- if (ldebug(clone))
	- printf("Segment created in clone with "
	- "CLONE_SETTLS: lobase: %x, hibase: %x, "
	- "lolimit: %x, hilimit: %x, type: %i, "
	- "dpl: %i, p: %i, xx: %i, long: %i, "
	- "def32: %i, gran: %i\n", sd.sd_lobase,
	- sd.sd_hibase, sd.sd_lolimit, sd.sd_hilimit,
	- sd.sd_type, sd.sd_dpl, sd.sd_p, sd.sd_xx,
	- sd.sd_long, sd.sd_def32, sd.sd_gran);
	-#endif
	- pcb = td2->td_pcb;
	- pcb->pcb_gsbase = (register_t)info.base_addr;
	-/* XXXKIB pcb->pcb_gs32sd = sd; */
	- td2->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL);
	- set_pcb_flags(pcb, PCB_GS32BIT \| PCB_32BIT);
	- }
	- }
	+ if (args->flags & LINUX_CLONE_SETTLS)
	+ linux_set_cloned_tls(td2, args->tls);

	#ifdef DEBUG
	if (ldebug(clone))
	printf(LMSG("clone: successful rfork to %d, "
	"stack %p sig = %d"), (int)p2->p_pid, args->stack,
	exit_signal);
	#endif
	if (args->flags & LINUX_CLONE_VFORK) {
	PROC_LOCK(p2);
	p2->p_flag \|= P_PPWAIT;
	PROC_UNLOCK(p2);
	}

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;

	if (args->flags & LINUX_CLONE_VFORK) {
	/* wait for the children to exit, ie. emulate vfork */
	PROC_LOCK(p2);
	while (p2->p_flag & P_PPWAIT)
	cv_wait(&p2->p_pwait, &p2->p_mtx);
	PROC_UNLOCK(p2);
	}

	return (0);
	}

	#define STACK_SIZE (2 * 1024 * 1024)
	#define GUARD_SIZE (4 * PAGE_SIZE)

	int
	linux_mmap2(struct thread td, struct linux_mmap2_args args)
	{

	#ifdef DEBUG
	if (ldebug(mmap2))
	printf(ARGS(mmap2, "0x%08x, %d, %d, 0x%08x, %d, %d"),
	args->addr, args->len, args->prot,
	args->flags, args->fd, args->pgoff);
	#endif

	return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot,
	args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
	PAGE_SIZE));
	}

	int
	linux_mmap(struct thread td, struct linux_mmap_args args)
	{
	int error;
	struct l_mmap_argv linux_args;

	error = copyin(args->ptr, &linux_args, sizeof(linux_args));
	if (error)
	return (error);

	#ifdef DEBUG
	if (ldebug(mmap))
	printf(ARGS(mmap, "0x%08x, %d, %d, 0x%08x, %d, %d"),
	linux_args.addr, linux_args.len, linux_args.prot,
	linux_args.flags, linux_args.fd, linux_args.pgoff);
	#endif

	return (linux_mmap_common(td, linux_args.addr, linux_args.len,
	linux_args.prot, linux_args.flags, linux_args.fd,
	(uint32_t)linux_args.pgoff));
	}

	static int
	linux_mmap_common(struct thread *td, l_uintptr_t addr, l_size_t len, l_int prot,
	l_int flags, l_int fd, l_loff_t pos)
	{
	struct proc *p = td->td_proc;
	struct mmap_args /* {
	caddr_t addr;
	size_t len;
	int prot;
	int flags;
	int fd;
	long pad;
	off_t pos;
	} */ bsd_args;
	int error;
	struct file *fp;

	error = 0;
	bsd_args.flags = 0;
	fp = NULL;

	/*
	* Linux mmap(2):
	* You must specify exactly one of MAP_SHARED and MAP_PRIVATE
	*/
	if (!((flags & LINUX_MAP_SHARED) ^ (flags & LINUX_MAP_PRIVATE)))
	return (EINVAL);

	if (flags & LINUX_MAP_SHARED)
	bsd_args.flags \|= MAP_SHARED;
	if (flags & LINUX_MAP_PRIVATE)
	bsd_args.flags \|= MAP_PRIVATE;
	if (flags & LINUX_MAP_FIXED)
	bsd_args.flags \|= MAP_FIXED;
	if (flags & LINUX_MAP_ANON) {
	/* Enforce pos to be on page boundary, then ignore. */
	if ((pos & PAGE_MASK) != 0)
	return (EINVAL);
	pos = 0;
	bsd_args.flags \|= MAP_ANON;
	} else
	bsd_args.flags \|= MAP_NOSYNC;
	if (flags & LINUX_MAP_GROWSDOWN)
	bsd_args.flags \|= MAP_STACK;

	/*
	* PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC
	* on Linux/i386. We do this to ensure maximum compatibility.
	* Linux/ia64 does the same in i386 emulation mode.
	*/
	bsd_args.prot = prot;
	if (bsd_args.prot & (PROT_READ \| PROT_WRITE \| PROT_EXEC))
	bsd_args.prot \|= PROT_READ \| PROT_EXEC;

	/* Linux does not check file descriptor when MAP_ANONYMOUS is set. */
	bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : fd;
	if (bsd_args.fd != -1) {
	/*
	* Linux follows Solaris mmap(2) description:
	* The file descriptor fildes is opened with
	* read permission, regardless of the
	* protection options specified.
	*/

	if ((error = fget(td, bsd_args.fd, &fp)) != 0)
	return (error);
	if (fp->f_type != DTYPE_VNODE) {
	fdrop(fp, td);
	return (EINVAL);
	}

	/* Linux mmap() just fails for O_WRONLY files */
	if (!(fp->f_flag & FREAD)) {
	fdrop(fp, td);
	return (EACCES);
	}

	fdrop(fp, td);
	}

	if (flags & LINUX_MAP_GROWSDOWN) {
	/*
	* The Linux MAP_GROWSDOWN option does not limit auto
	* growth of the region. Linux mmap with this option
	* takes as addr the inital BOS, and as len, the initial
	* region size. It can then grow down from addr without
	* limit. However, Linux threads has an implicit internal
	* limit to stack size of STACK_SIZE. Its just not
	* enforced explicitly in Linux. But, here we impose
	* a limit of (STACK_SIZE - GUARD_SIZE) on the stack
	* region, since we can do this with our mmap.
	*
	* Our mmap with MAP_STACK takes addr as the maximum
	* downsize limit on BOS, and as len the max size of
	* the region. It then maps the top SGROWSIZ bytes,
	* and auto grows the region down, up to the limit
	* in addr.
	*
	* If we don't use the MAP_STACK option, the effect
	* of this code is to allocate a stack region of a
	* fixed size of (STACK_SIZE - GUARD_SIZE).
	*/

	if ((caddr_t)PTRIN(addr) + len > p->p_vmspace->vm_maxsaddr) {
	/*
	* Some Linux apps will attempt to mmap
	* thread stacks near the top of their
	* address space. If their TOS is greater
	* than vm_maxsaddr, vm_map_growstack()
	* will confuse the thread stack with the
	* process stack and deliver a SEGV if they
	* attempt to grow the thread stack past their
	* current stacksize rlimit. To avoid this,
	* adjust vm_maxsaddr upwards to reflect
	* the current stacksize rlimit rather
	* than the maximum possible stacksize.
	* It would be better to adjust the
	* mmap'ed region, but some apps do not check
	* mmap's return value.
	*/
	PROC_LOCK(p);
	p->p_vmspace->vm_maxsaddr = (char *)LINUX32_USRSTACK -
	lim_cur(p, RLIMIT_STACK);
	PROC_UNLOCK(p);
	}

	/*
	* This gives us our maximum stack size and a new BOS.
	* If we're using VM_STACK, then mmap will just map
	* the top SGROWSIZ bytes, and let the stack grow down
	* to the limit at BOS. If we're not using VM_STACK
	* we map the full stack, since we don't have a way
	* to autogrow it.
	*/
	if (len > STACK_SIZE - GUARD_SIZE) {
	bsd_args.addr = (caddr_t)PTRIN(addr);
	bsd_args.len = len;
	} else {
	bsd_args.addr = (caddr_t)PTRIN(addr) -
	(STACK_SIZE - GUARD_SIZE - len);
	bsd_args.len = STACK_SIZE - GUARD_SIZE;
	}
	} else {
	bsd_args.addr = (caddr_t)PTRIN(addr);
	bsd_args.len = len;
	}
	bsd_args.pos = pos;

	#ifdef DEBUG
	if (ldebug(mmap))
	printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n",
	__func__,
	(void *)bsd_args.addr, (int)bsd_args.len, bsd_args.prot,
	bsd_args.flags, bsd_args.fd, (int)bsd_args.pos);
	#endif
	error = mmap(td, &bsd_args);
	#ifdef DEBUG
	if (ldebug(mmap))
	printf("-> %s() return: 0x%x (0x%08x)\n",
	__func__, error, (u_int)td->td_retval[0]);
	#endif
	return (error);
	}

	int
	linux_mprotect(struct thread td, struct linux_mprotect_args uap)
	{
	struct mprotect_args bsd_args;

	bsd_args.addr = uap->addr;
	bsd_args.len = uap->len;
	bsd_args.prot = uap->prot;
	if (bsd_args.prot & (PROT_READ \| PROT_WRITE \| PROT_EXEC))
	bsd_args.prot \|= PROT_READ \| PROT_EXEC;
	return (mprotect(td, &bsd_args));
	}

	int
	linux_iopl(struct thread td, struct linux_iopl_args args)
	{
	int error;

	if (args->level < 0 \|\| args->level > 3)
	return (EINVAL);
	if ((error = priv_check(td, PRIV_IO)) != 0)
	return (error);
	if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
	return (error);
	td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) \|
	(args->level * (PSL_IOPL / 3));

	return (0);
	}

	int
	linux_pipe(struct thread td, struct linux_pipe_args args)
	{
	int error;
	int fildes[2];

	#ifdef DEBUG
	if (ldebug(pipe))
	printf(ARGS(pipe, "*"));
	#endif

	error = kern_pipe(td, fildes);
	if (error)
	return (error);

	/* XXX: Close descriptors on error. */
	return (copyout(fildes, args->pipefds, sizeof fildes));
	}

	int
	linux_sigaction(struct thread td, struct linux_sigaction_args args)
	{
	l_osigaction_t osa;
	l_sigaction_t act, oact;
	int error;

	#ifdef DEBUG
	if (ldebug(sigaction))
	printf(ARGS(sigaction, "%d, %p, %p"),
	args->sig, (void )args->nsa, (void )args->osa);
	#endif

	if (args->nsa != NULL) {
	error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
	if (error)
	return (error);
	act.lsa_handler = osa.lsa_handler;
	act.lsa_flags = osa.lsa_flags;
	act.lsa_restorer = osa.lsa_restorer;
	LINUX_SIGEMPTYSET(act.lsa_mask);
	act.lsa_mask.__bits[0] = osa.lsa_mask;
	}

	error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
	args->osa ? &oact : NULL);

	if (args->osa != NULL && !error) {
	osa.lsa_handler = oact.lsa_handler;
	osa.lsa_flags = oact.lsa_flags;
	osa.lsa_restorer = oact.lsa_restorer;
	osa.lsa_mask = oact.lsa_mask.__bits[0];
	error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
	}

	return (error);
	}

	/*
	* Linux has two extra args, restart and oldmask. We don't use these,
	* but it seems that "restart" is actually a context pointer that
	* enables the signal to happen with a different register set.
	*/
	int
	linux_sigsuspend(struct thread td, struct linux_sigsuspend_args args)
	{
	sigset_t sigmask;
	l_sigset_t mask;

	#ifdef DEBUG
	if (ldebug(sigsuspend))
	printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
	#endif

	LINUX_SIGEMPTYSET(mask);
	mask.__bits[0] = args->mask;
	linux_to_bsd_sigset(&mask, &sigmask);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_rt_sigsuspend(struct thread td, struct linux_rt_sigsuspend_args uap)
	{
	l_sigset_t lmask;
	sigset_t sigmask;
	int error;

	#ifdef DEBUG
	if (ldebug(rt_sigsuspend))
	printf(ARGS(rt_sigsuspend, "%p, %d"),
	(void *)uap->newset, uap->sigsetsize);
	#endif

	if (uap->sigsetsize != sizeof(l_sigset_t))
	return (EINVAL);

	error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
	if (error)
	return (error);

	linux_to_bsd_sigset(&lmask, &sigmask);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_pause(struct thread td, struct linux_pause_args args)
	{
	struct proc *p = td->td_proc;
	sigset_t sigmask;

	#ifdef DEBUG
	if (ldebug(pause))
	printf(ARGS(pause, ""));
	#endif

	PROC_LOCK(p);
	sigmask = td->td_sigmask;
	PROC_UNLOCK(p);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_sigaltstack(struct thread td, struct linux_sigaltstack_args uap)
	{
	stack_t ss, oss;
	l_stack_t lss;
	int error;

	#ifdef DEBUG
	if (ldebug(sigaltstack))
	printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
	#endif

	if (uap->uss != NULL) {
	error = copyin(uap->uss, &lss, sizeof(l_stack_t));
	if (error)
	return (error);

	ss.ss_sp = PTRIN(lss.ss_sp);
	ss.ss_size = lss.ss_size;
	ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
	}
	error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
	(uap->uoss != NULL) ? &oss : NULL);
	if (!error && uap->uoss != NULL) {
	lss.ss_sp = PTROUT(oss.ss_sp);
	lss.ss_size = oss.ss_size;
	lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
	error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
	}

	return (error);
	}

	int
	linux_ftruncate64(struct thread td, struct linux_ftruncate64_args args)
	{
	struct ftruncate_args sa;

	#ifdef DEBUG
	if (ldebug(ftruncate64))
	printf(ARGS(ftruncate64, "%u, %jd"), args->fd,
	(intmax_t)args->length);
	#endif

	sa.fd = args->fd;
	sa.length = args->length;
	return ftruncate(td, &sa);
	}

	int
	linux_gettimeofday(struct thread td, struct linux_gettimeofday_args uap)
	{
	struct timeval atv;
	l_timeval atv32;
	struct timezone rtz;
	int error = 0;

	if (uap->tp) {
	microtime(&atv);
	atv32.tv_sec = atv.tv_sec;
	atv32.tv_usec = atv.tv_usec;
	error = copyout(&atv32, uap->tp, sizeof(atv32));
	}
	if (error == 0 && uap->tzp != NULL) {
	rtz.tz_minuteswest = tz_minuteswest;
	rtz.tz_dsttime = tz_dsttime;
	error = copyout(&rtz, uap->tzp, sizeof(rtz));
	}
	return (error);
	}

	int
	linux_settimeofday(struct thread td, struct linux_settimeofday_args uap)
	{
	l_timeval atv32;
	struct timeval atv, *tvp;
	struct timezone atz, *tzp;
	int error;

	if (uap->tp) {
	error = copyin(uap->tp, &atv32, sizeof(atv32));
	if (error)
	return (error);
	atv.tv_sec = atv32.tv_sec;
	atv.tv_usec = atv32.tv_usec;
	tvp = &atv;
	} else
	tvp = NULL;
	if (uap->tzp) {
	error = copyin(uap->tzp, &atz, sizeof(atz));
	if (error)
	return (error);
	tzp = &atz;
	} else
	tzp = NULL;
	return (kern_settimeofday(td, tvp, tzp));
	}

	int
	linux_getrusage(struct thread td, struct linux_getrusage_args uap)
	{
	struct l_rusage s32;
	struct rusage s;
	int error;

	error = kern_getrusage(td, uap->who, &s);
	if (error != 0)
	return (error);
	if (uap->rusage != NULL) {
	bsd_to_linux_rusage(&s, &s32);
	error = copyout(&s32, uap->rusage, sizeof(s32));
	}
	return (error);
	}

	int
	linux_sched_rr_get_interval(struct thread *td,
	struct linux_sched_rr_get_interval_args *uap)
	{
	struct timespec ts;
	struct l_timespec ts32;
	int error;

	error = kern_sched_rr_get_interval(td, uap->pid, &ts);
	if (error != 0)
	return (error);
	ts32.tv_sec = ts.tv_sec;
	ts32.tv_nsec = ts.tv_nsec;
	return (copyout(&ts32, uap->interval, sizeof(ts32)));
	}

	int
	linux_set_thread_area(struct thread *td,
	struct linux_set_thread_area_args *args)
	{
	struct l_user_desc info;
	struct user_segment_descriptor sd;
	struct pcb *pcb;
	int a[2];
	int error;

	error = copyin(args->desc, &info, sizeof(struct l_user_desc));
	if (error)
	return (error);

	#ifdef DEBUG
	if (ldebug(set_thread_area))
	printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, "
	"%i, %i, %i"), info.entry_number, info.base_addr,
	info.limit, info.seg_32bit, info.contents,
	info.read_exec_only, info.limit_in_pages,
	info.seg_not_present, info.useable);
	#endif

	/*
	* Semantics of Linux version: every thread in the system has array
	* of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown.
	* This syscall loads one of the selected TLS decriptors with a value
	* and also loads GDT descriptors 6, 7 and 8 with the content of
	* the per-thread descriptors.
	*
	* Semantics of FreeBSD version: I think we can ignore that Linux has
	* three per-thread descriptors and use just the first one.
	* The tls_array[] is used only in [gs]et_thread_area() syscalls and
	* for loading the GDT descriptors. We use just one GDT descriptor
	* for TLS, so we will load just one.
	*
	* XXX: This doesn't work when a user space process tries to use more
	* than one TLS segment. Comment in the Linux source says wine might
	* do this.
	*/

	/*
	* GLIBC reads current %gs and call set_thread_area() with it.
	* We should let GUDATA_SEL and GUGS32_SEL proceed as well because
	* we use these segments.
	*/
	switch (info.entry_number) {
	case GUGS32_SEL:
	case GUDATA_SEL:
	case 6:
	case -1:
	info.entry_number = GUGS32_SEL;
	break;
	default:
	return (EINVAL);
	}

	/*
	* We have to copy out the GDT entry we use.
	*
	* XXX: What if a user space program does not check the return value
	* and tries to use 6, 7 or 8?
	*/
	error = copyout(&info, args->desc, sizeof(struct l_user_desc));
	if (error)
	return (error);

	if (LINUX_LDT_empty(&info)) {
	a[0] = 0;
	a[1] = 0;
	} else {
	a[0] = LINUX_LDT_entry_a(&info);
	a[1] = LINUX_LDT_entry_b(&info);
	}

	memcpy(&sd, &a, sizeof(a));
	#ifdef DEBUG
	if (ldebug(set_thread_area))
	printf("Segment created in set_thread_area: "
	"lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, "
	"type: %i, dpl: %i, p: %i, xx: %i, long: %i, "
	"def32: %i, gran: %i\n",
	sd.sd_lobase,
	sd.sd_hibase,
	sd.sd_lolimit,
	sd.sd_hilimit,
	sd.sd_type,
	sd.sd_dpl,
	sd.sd_p,
	sd.sd_xx,
	sd.sd_long,
	sd.sd_def32,
	sd.sd_gran);
	#endif

	pcb = td->td_pcb;
	pcb->pcb_gsbase = (register_t)info.base_addr;
	set_pcb_flags(pcb, PCB_32BIT \| PCB_GS32BIT);
	update_gdt_gsbase(td, info.base_addr);

	return (0);
	}

	int
	linux_wait4(struct thread td, struct linux_wait4_args args)
	{
	int error, options;
	struct rusage ru, *rup;
	struct l_rusage lru;

	#ifdef DEBUG
	if (ldebug(wait4))
	printf(ARGS(wait4, "%d, %p, %d, %p"),
	args->pid, (void *)args->status, args->options,
	(void *)args->rusage);
	#endif

	options = (args->options & (WNOHANG \| WUNTRACED));
	/* WLINUXCLONE should be equal to __WCLONE, but we make sure */
	if (args->options & __WCLONE)
	options \|= WLINUXCLONE;

	if (args->rusage != NULL)
	rup = &ru;
	else
	rup = NULL;
	error = linux_common_wait(td, args->pid, args->status, options, rup);
	if (error)
	return (error);
	if (args->rusage != NULL) {
	bsd_to_linux_rusage(rup, &lru);
	error = copyout(&lru, args->rusage, sizeof(lru));
	}

	return (error);
	}
	Index: stable/8/sys/cddl/contrib/opensolaris
	===================================================================
	--- stable/8/sys/cddl/contrib/opensolaris (revision 219190)
	+++ stable/8/sys/cddl/contrib/opensolaris (revision 219191)

	Property changes on: stable/8/sys/cddl/contrib/opensolaris
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/cddl/contrib/opensolaris:r218612
	Index: stable/8/sys/contrib/dev/acpica
	===================================================================
	--- stable/8/sys/contrib/dev/acpica (revision 219190)
	+++ stable/8/sys/contrib/dev/acpica (revision 219191)

	Property changes on: stable/8/sys/contrib/dev/acpica
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/contrib/dev/acpica:r218612
	Index: stable/8/sys/contrib/pf
	===================================================================
	--- stable/8/sys/contrib/pf (revision 219190)
	+++ stable/8/sys/contrib/pf (revision 219191)

	Property changes on: stable/8/sys/contrib/pf
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/contrib/pf:r218612
	Index: stable/8/sys/i386/linux/linux_machdep.c
	===================================================================
	--- stable/8/sys/i386/linux/linux_machdep.c (revision 219190)
	+++ stable/8/sys/i386/linux/linux_machdep.c (revision 219191)
	@@ -1,1345 +1,1349 @@
	/*-
	* Copyright (c) 2000 Marcel Moolenaar
	* All rights reserved.
	*
	* 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
	* in this position and unchanged.
	* 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.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
	*/

	#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");

	#include <sys/param.h>
	#include <sys/systm.h>
	#include <sys/file.h>
	#include <sys/fcntl.h>
	#include <sys/imgact.h>
	#include <sys/lock.h>
	#include <sys/malloc.h>
	#include <sys/mman.h>
	#include <sys/mutex.h>
	#include <sys/sx.h>
	#include <sys/priv.h>
	#include <sys/proc.h>
	#include <sys/queue.h>
	#include <sys/resource.h>
	#include <sys/resourcevar.h>
	#include <sys/signalvar.h>
	#include <sys/syscallsubr.h>
	#include <sys/sysproto.h>
	#include <sys/unistd.h>
	#include <sys/wait.h>
	#include <sys/sched.h>

	#include <machine/frame.h>
	#include <machine/psl.h>
	#include <machine/segments.h>
	#include <machine/sysarch.h>

	#include <vm/vm.h>
	#include <vm/pmap.h>
	#include <vm/vm_map.h>

	#include <i386/linux/linux.h>
	#include <i386/linux/linux_proto.h>
	#include <compat/linux/linux_ipc.h>
	#include <compat/linux/linux_misc.h>
	#include <compat/linux/linux_signal.h>
	#include <compat/linux/linux_util.h>
	#include <compat/linux/linux_emul.h>

	#include <i386/include/pcb.h> /* needed for pcb definition in linux_set_thread_area */

	#include "opt_posix.h"

	extern struct sysentvec elf32_freebsd_sysvec; /* defined in i386/i386/elf_machdep.c */

	struct l_descriptor {
	l_uint entry_number;
	l_ulong base_addr;
	l_uint limit;
	l_uint seg_32bit:1;
	l_uint contents:2;
	l_uint read_exec_only:1;
	l_uint limit_in_pages:1;
	l_uint seg_not_present:1;
	l_uint useable:1;
	};

	struct l_old_select_argv {
	l_int nfds;
	l_fd_set *readfds;
	l_fd_set *writefds;
	l_fd_set *exceptfds;
	struct l_timeval *timeout;
	};

	static int linux_mmap_common(struct thread *td, l_uintptr_t addr,
	l_size_t len, l_int prot, l_int flags, l_int fd,
	l_loff_t pos);

	int
	linux_to_bsd_sigaltstack(int lsa)
	{
	int bsa = 0;

	if (lsa & LINUX_SS_DISABLE)
	bsa \|= SS_DISABLE;
	if (lsa & LINUX_SS_ONSTACK)
	bsa \|= SS_ONSTACK;
	return (bsa);
	}

	int
	bsd_to_linux_sigaltstack(int bsa)
	{
	int lsa = 0;

	if (bsa & SS_DISABLE)
	lsa \|= LINUX_SS_DISABLE;
	if (bsa & SS_ONSTACK)
	lsa \|= LINUX_SS_ONSTACK;
	return (lsa);
	}

	int
	linux_execve(struct thread td, struct linux_execve_args args)
	{
	int error;
	char *newpath;
	struct image_args eargs;

	LCONVPATHEXIST(td, args->path, &newpath);

	#ifdef DEBUG
	if (ldebug(execve))
	printf(ARGS(execve, "%s"), newpath);
	#endif

	error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
	args->argp, args->envp);
	free(newpath, M_TEMP);
	if (error == 0)
	error = kern_execve(td, &eargs, NULL);
	if (error == 0)
	/* linux process can exec fbsd one, dont attempt
	* to create emuldata for such process using
	* linux_proc_init, this leads to a panic on KASSERT
	* because such process has p->p_emuldata == NULL
	*/
	if (SV_PROC_ABI(td->td_proc) == SV_ABI_LINUX)
	error = linux_proc_init(td, 0, 0);
	return (error);
	}

	struct l_ipc_kludge {
	struct l_msgbuf *msgp;
	l_long msgtyp;
	};

	int
	linux_ipc(struct thread td, struct linux_ipc_args args)
	{

	switch (args->what & 0xFFFF) {
	case LINUX_SEMOP: {
	struct linux_semop_args a;

	a.semid = args->arg1;
	a.tsops = args->ptr;
	a.nsops = args->arg2;
	return (linux_semop(td, &a));
	}
	case LINUX_SEMGET: {
	struct linux_semget_args a;

	a.key = args->arg1;
	a.nsems = args->arg2;
	a.semflg = args->arg3;
	return (linux_semget(td, &a));
	}
	case LINUX_SEMCTL: {
	struct linux_semctl_args a;
	int error;

	a.semid = args->arg1;
	a.semnum = args->arg2;
	a.cmd = args->arg3;
	error = copyin(args->ptr, &a.arg, sizeof(a.arg));
	if (error)
	return (error);
	return (linux_semctl(td, &a));
	}
	case LINUX_MSGSND: {
	struct linux_msgsnd_args a;

	a.msqid = args->arg1;
	a.msgp = args->ptr;
	a.msgsz = args->arg2;
	a.msgflg = args->arg3;
	return (linux_msgsnd(td, &a));
	}
	case LINUX_MSGRCV: {
	struct linux_msgrcv_args a;

	a.msqid = args->arg1;
	a.msgsz = args->arg2;
	a.msgflg = args->arg3;
	if ((args->what >> 16) == 0) {
	struct l_ipc_kludge tmp;
	int error;

	if (args->ptr == NULL)
	return (EINVAL);
	error = copyin(args->ptr, &tmp, sizeof(tmp));
	if (error)
	return (error);
	a.msgp = tmp.msgp;
	a.msgtyp = tmp.msgtyp;
	} else {
	a.msgp = args->ptr;
	a.msgtyp = args->arg5;
	}
	return (linux_msgrcv(td, &a));
	}
	case LINUX_MSGGET: {
	struct linux_msgget_args a;

	a.key = args->arg1;
	a.msgflg = args->arg2;
	return (linux_msgget(td, &a));
	}
	case LINUX_MSGCTL: {
	struct linux_msgctl_args a;

	a.msqid = args->arg1;
	a.cmd = args->arg2;
	a.buf = args->ptr;
	return (linux_msgctl(td, &a));
	}
	case LINUX_SHMAT: {
	struct linux_shmat_args a;

	a.shmid = args->arg1;
	a.shmaddr = args->ptr;
	a.shmflg = args->arg2;
	a.raddr = (l_ulong *)args->arg3;
	return (linux_shmat(td, &a));
	}
	case LINUX_SHMDT: {
	struct linux_shmdt_args a;

	a.shmaddr = args->ptr;
	return (linux_shmdt(td, &a));
	}
	case LINUX_SHMGET: {
	struct linux_shmget_args a;

	a.key = args->arg1;
	a.size = args->arg2;
	a.shmflg = args->arg3;
	return (linux_shmget(td, &a));
	}
	case LINUX_SHMCTL: {
	struct linux_shmctl_args a;

	a.shmid = args->arg1;
	a.cmd = args->arg2;
	a.buf = args->ptr;
	return (linux_shmctl(td, &a));
	}
	default:
	break;
	}

	return (EINVAL);
	}

	int
	linux_old_select(struct thread td, struct linux_old_select_args args)
	{
	struct l_old_select_argv linux_args;
	struct linux_select_args newsel;
	int error;

	#ifdef DEBUG
	if (ldebug(old_select))
	printf(ARGS(old_select, "%p"), args->ptr);
	#endif

	error = copyin(args->ptr, &linux_args, sizeof(linux_args));
	if (error)
	return (error);

	newsel.nfds = linux_args.nfds;
	newsel.readfds = linux_args.readfds;
	newsel.writefds = linux_args.writefds;
	newsel.exceptfds = linux_args.exceptfds;
	newsel.timeout = linux_args.timeout;
	return (linux_select(td, &newsel));
	}

	int
	linux_fork(struct thread td, struct linux_fork_args args)
	{
	int error;
	struct proc *p2;
	struct thread *td2;

	#ifdef DEBUG
	if (ldebug(fork))
	printf(ARGS(fork, ""));
	#endif

	if ((error = fork1(td, RFFDG \| RFPROC \| RFSTOPPED, 0, &p2)) != 0)
	return (error);

	if (error == 0) {
	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;
	}

	if (td->td_retval[1] == 1)
	td->td_retval[0] = 0;
	error = linux_proc_init(td, td->td_retval[0], 0);
	if (error)
	return (error);

	td2 = FIRST_THREAD_IN_PROC(p2);

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	return (0);
	}

	int
	linux_vfork(struct thread td, struct linux_vfork_args args)
	{
	int error;
	struct proc *p2;
	struct thread *td2;

	#ifdef DEBUG
	if (ldebug(vfork))
	printf(ARGS(vfork, ""));
	#endif

	/* exclude RFPPWAIT */
	if ((error = fork1(td, RFFDG \| RFPROC \| RFMEM \| RFSTOPPED, 0, &p2)) != 0)
	return (error);
	if (error == 0) {
	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;
	}
	/* Are we the child? */
	if (td->td_retval[1] == 1)
	td->td_retval[0] = 0;
	error = linux_proc_init(td, td->td_retval[0], 0);
	if (error)
	return (error);

	PROC_LOCK(p2);
	p2->p_flag \|= P_PPWAIT;
	PROC_UNLOCK(p2);

	td2 = FIRST_THREAD_IN_PROC(p2);

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	/* wait for the children to exit, ie. emulate vfork */
	PROC_LOCK(p2);
	while (p2->p_flag & P_PPWAIT)
	cv_wait(&p2->p_pwait, &p2->p_mtx);
	PROC_UNLOCK(p2);

	return (0);
	}

	+static int
	+linux_set_cloned_tls(struct thread td, void desc)
	+{
	+ struct segment_descriptor sd;
	+ struct l_user_desc info;
	+ int idx, error;
	+ int a[2];
	+
	+ error = copyin(desc, &info, sizeof(struct l_user_desc));
	+ if (error) {
	+ printf(LMSG("copyin failed!"));
	+ } else {
	+ idx = info.entry_number;
	+
	+ /*
	+ * looks like we're getting the idx we returned
	+ * in the set_thread_area() syscall
	+ */
	+ if (idx != 6 && idx != 3) {
	+ printf(LMSG("resetting idx!"));
	+ idx = 3;
	+ }
	+
	+ /* this doesnt happen in practice */
	+ if (idx == 6) {
	+ /* we might copy out the entry_number as 3 */
	+ info.entry_number = 3;
	+ error = copyout(&info, desc, sizeof(struct l_user_desc));
	+ if (error)
	+ printf(LMSG("copyout failed!"));
	+ }
	+
	+ a[0] = LINUX_LDT_entry_a(&info);
	+ a[1] = LINUX_LDT_entry_b(&info);
	+
	+ memcpy(&sd, &a, sizeof(a));
	+#ifdef DEBUG
	+ if (ldebug(clone))
	+ printf("Segment created in clone with "
	+ "CLONE_SETTLS: lobase: %x, hibase: %x, "
	+ "lolimit: %x, hilimit: %x, type: %i, "
	+ "dpl: %i, p: %i, xx: %i, def32: %i, "
	+ "gran: %i\n", sd.sd_lobase, sd.sd_hibase,
	+ sd.sd_lolimit, sd.sd_hilimit, sd.sd_type,
	+ sd.sd_dpl, sd.sd_p, sd.sd_xx,
	+ sd.sd_def32, sd.sd_gran);
	+#endif
	+
	+ /* set %gs */
	+ td->td_pcb->pcb_gsd = sd;
	+ td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
	+ }
	+
	+ return (error);
	+}
	+
	int
	linux_clone(struct thread td, struct linux_clone_args args)
	{
	int error, ff = RFPROC \| RFSTOPPED;
	struct proc *p2;
	struct thread *td2;
	int exit_signal;
	struct linux_emuldata *em;

	#ifdef DEBUG
	if (ldebug(clone)) {
	printf(ARGS(clone, "flags %x, stack %x, parent tid: %x, child tid: %x"),
	(unsigned int)args->flags, (unsigned int)args->stack,
	(unsigned int)args->parent_tidptr, (unsigned int)args->child_tidptr);
	}
	#endif

	exit_signal = args->flags & 0x000000ff;
	if (LINUX_SIG_VALID(exit_signal)) {
	if (exit_signal <= LINUX_SIGTBLSZ)
	exit_signal =
	linux_to_bsd_signal[_SIG_IDX(exit_signal)];
	} else if (exit_signal != 0)
	return (EINVAL);

	if (args->flags & LINUX_CLONE_VM)
	ff \|= RFMEM;
	if (args->flags & LINUX_CLONE_SIGHAND)
	ff \|= RFSIGSHARE;
	/*
	* XXX: in linux sharing of fs info (chroot/cwd/umask)
	* and open files is independant. in fbsd its in one
	* structure but in reality it doesn't cause any problems
	* because both of these flags are usually set together.
	*/
	if (!(args->flags & (LINUX_CLONE_FILES \| LINUX_CLONE_FS)))
	ff \|= RFFDG;

	/*
	* Attempt to detect when linux_clone(2) is used for creating
	* kernel threads. Unfortunately despite the existence of the
	* CLONE_THREAD flag, version of linuxthreads package used in
	* most popular distros as of beginning of 2005 doesn't make
	* any use of it. Therefore, this detection relies on
	* empirical observation that linuxthreads sets certain
	* combination of flags, so that we can make more or less
	* precise detection and notify the FreeBSD kernel that several
	* processes are in fact part of the same threading group, so
	* that special treatment is necessary for signal delivery
	* between those processes and fd locking.
	*/
	if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
	ff \|= RFTHREAD;

	if (args->flags & LINUX_CLONE_PARENT_SETTID)
	if (args->parent_tidptr == NULL)
	return (EINVAL);

	error = fork1(td, ff, 0, &p2);
	if (error)
	return (error);

	if (args->flags & (LINUX_CLONE_PARENT \| LINUX_CLONE_THREAD)) {
	sx_xlock(&proctree_lock);
	PROC_LOCK(p2);
	proc_reparent(p2, td->td_proc->p_pptr);
	PROC_UNLOCK(p2);
	sx_xunlock(&proctree_lock);
	}

	/* create the emuldata */
	error = linux_proc_init(td, p2->p_pid, args->flags);
	/* reference it - no need to check this */
	em = em_find(p2, EMUL_DOLOCK);
	KASSERT(em != NULL, ("clone: emuldata not found.\n"));
	/* and adjust it */

	if (args->flags & LINUX_CLONE_THREAD) {
	/* XXX: linux mangles pgrp and pptr somehow
	* I think it might be this but I am not sure.
	*/
	#ifdef notyet
	PROC_LOCK(p2);
	p2->p_pgrp = td->td_proc->p_pgrp;
	PROC_UNLOCK(p2);
	#endif
	exit_signal = 0;
	}

	if (args->flags & LINUX_CLONE_CHILD_SETTID)
	em->child_set_tid = args->child_tidptr;
	else
	em->child_set_tid = NULL;

	if (args->flags & LINUX_CLONE_CHILD_CLEARTID)
	em->child_clear_tid = args->child_tidptr;
	else
	em->child_clear_tid = NULL;

	EMUL_UNLOCK(&emul_lock);

	if (args->flags & LINUX_CLONE_PARENT_SETTID) {
	error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
	if (error)
	printf(LMSG("copyout failed!"));
	}

	PROC_LOCK(p2);
	p2->p_sigparent = exit_signal;
	PROC_UNLOCK(p2);
	td2 = FIRST_THREAD_IN_PROC(p2);
	/*
	* in a case of stack = NULL we are supposed to COW calling process stack
	* this is what normal fork() does so we just keep the tf_esp arg intact
	*/
	if (args->stack)
	td2->td_frame->tf_esp = (unsigned int)args->stack;

	- if (args->flags & LINUX_CLONE_SETTLS) {
	- struct l_user_desc info;
	- int idx;
	- int a[2];
	- struct segment_descriptor sd;
	-
	- error = copyin((void *)td->td_frame->tf_esi, &info, sizeof(struct l_user_desc));
	- if (error) {
	- printf(LMSG("copyin failed!"));
	- } else {
	-
	- idx = info.entry_number;
	-
	- /*
	- * looks like we're getting the idx we returned
	- * in the set_thread_area() syscall
	- */
	- if (idx != 6 && idx != 3) {
	- printf(LMSG("resetting idx!"));
	- idx = 3;
	- }
	-
	- /* this doesnt happen in practice */
	- if (idx == 6) {
	- /* we might copy out the entry_number as 3 */
	- info.entry_number = 3;
	- error = copyout(&info, (void *) td->td_frame->tf_esi, sizeof(struct l_user_desc));
	- if (error)
	- printf(LMSG("copyout failed!"));
	- }
	-
	- a[0] = LINUX_LDT_entry_a(&info);
	- a[1] = LINUX_LDT_entry_b(&info);
	-
	- memcpy(&sd, &a, sizeof(a));
	-#ifdef DEBUG
	- if (ldebug(clone))
	- printf("Segment created in clone with CLONE_SETTLS: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
	- sd.sd_hibase,
	- sd.sd_lolimit,
	- sd.sd_hilimit,
	- sd.sd_type,
	- sd.sd_dpl,
	- sd.sd_p,
	- sd.sd_xx,
	- sd.sd_def32,
	- sd.sd_gran);
	-#endif
	-
	- /* set %gs */
	- td2->td_pcb->pcb_gsd = sd;
	- td2->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
	- }
	- }
	+ if (args->flags & LINUX_CLONE_SETTLS)
	+ linux_set_cloned_tls(td2, args->tls);

	#ifdef DEBUG
	if (ldebug(clone))
	printf(LMSG("clone: successful rfork to %ld, stack %p sig = %d"),
	(long)p2->p_pid, args->stack, exit_signal);
	#endif
	if (args->flags & LINUX_CLONE_VFORK) {
	PROC_LOCK(p2);
	p2->p_flag \|= P_PPWAIT;
	PROC_UNLOCK(p2);
	}

	/*
	* Make this runnable after we are finished with it.
	*/
	thread_lock(td2);
	TD_SET_CAN_RUN(td2);
	sched_add(td2, SRQ_BORING);
	thread_unlock(td2);

	td->td_retval[0] = p2->p_pid;
	td->td_retval[1] = 0;

	if (args->flags & LINUX_CLONE_VFORK) {
	/* wait for the children to exit, ie. emulate vfork */
	PROC_LOCK(p2);
	while (p2->p_flag & P_PPWAIT)
	cv_wait(&p2->p_pwait, &p2->p_mtx);
	PROC_UNLOCK(p2);
	}

	return (0);
	}

	#define STACK_SIZE (2 * 1024 * 1024)
	#define GUARD_SIZE (4 * PAGE_SIZE)

	int
	linux_mmap2(struct thread td, struct linux_mmap2_args args)
	{

	#ifdef DEBUG
	if (ldebug(mmap2))
	printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
	(void *)args->addr, args->len, args->prot,
	args->flags, args->fd, args->pgoff);
	#endif

	return (linux_mmap_common(td, args->addr, args->len, args->prot,
	args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
	PAGE_SIZE));
	}

	int
	linux_mmap(struct thread td, struct linux_mmap_args args)
	{
	int error;
	struct l_mmap_argv linux_args;

	error = copyin(args->ptr, &linux_args, sizeof(linux_args));
	if (error)
	return (error);

	#ifdef DEBUG
	if (ldebug(mmap))
	printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
	(void *)linux_args.addr, linux_args.len, linux_args.prot,
	linux_args.flags, linux_args.fd, linux_args.pgoff);
	#endif

	return (linux_mmap_common(td, linux_args.addr, linux_args.len,
	linux_args.prot, linux_args.flags, linux_args.fd,
	(uint32_t)linux_args.pgoff));
	}

	static int
	linux_mmap_common(struct thread *td, l_uintptr_t addr, l_size_t len, l_int prot,
	l_int flags, l_int fd, l_loff_t pos)
	{
	struct proc *p = td->td_proc;
	struct mmap_args /* {
	caddr_t addr;
	size_t len;
	int prot;
	int flags;
	int fd;
	long pad;
	off_t pos;
	} */ bsd_args;
	int error;
	struct file *fp;

	error = 0;
	bsd_args.flags = 0;
	fp = NULL;

	/*
	* Linux mmap(2):
	* You must specify exactly one of MAP_SHARED and MAP_PRIVATE
	*/
	if (!((flags & LINUX_MAP_SHARED) ^ (flags & LINUX_MAP_PRIVATE)))
	return (EINVAL);

	if (flags & LINUX_MAP_SHARED)
	bsd_args.flags \|= MAP_SHARED;
	if (flags & LINUX_MAP_PRIVATE)
	bsd_args.flags \|= MAP_PRIVATE;
	if (flags & LINUX_MAP_FIXED)
	bsd_args.flags \|= MAP_FIXED;
	if (flags & LINUX_MAP_ANON) {
	/* Enforce pos to be on page boundary, then ignore. */
	if ((pos & PAGE_MASK) != 0)
	return (EINVAL);
	pos = 0;
	bsd_args.flags \|= MAP_ANON;
	} else
	bsd_args.flags \|= MAP_NOSYNC;
	if (flags & LINUX_MAP_GROWSDOWN)
	bsd_args.flags \|= MAP_STACK;

	/*
	* PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC
	* on Linux/i386. We do this to ensure maximum compatibility.
	* Linux/ia64 does the same in i386 emulation mode.
	*/
	bsd_args.prot = prot;
	if (bsd_args.prot & (PROT_READ \| PROT_WRITE \| PROT_EXEC))
	bsd_args.prot \|= PROT_READ \| PROT_EXEC;

	/* Linux does not check file descriptor when MAP_ANONYMOUS is set. */
	bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : fd;
	if (bsd_args.fd != -1) {
	/*
	* Linux follows Solaris mmap(2) description:
	* The file descriptor fildes is opened with
	* read permission, regardless of the
	* protection options specified.
	*/

	if ((error = fget(td, bsd_args.fd, &fp)) != 0)
	return (error);
	if (fp->f_type != DTYPE_VNODE) {
	fdrop(fp, td);
	return (EINVAL);
	}

	/* Linux mmap() just fails for O_WRONLY files */
	if (!(fp->f_flag & FREAD)) {
	fdrop(fp, td);
	return (EACCES);
	}

	fdrop(fp, td);
	}

	if (flags & LINUX_MAP_GROWSDOWN) {
	/*
	* The Linux MAP_GROWSDOWN option does not limit auto
	* growth of the region. Linux mmap with this option
	* takes as addr the inital BOS, and as len, the initial
	* region size. It can then grow down from addr without
	* limit. However, linux threads has an implicit internal
	* limit to stack size of STACK_SIZE. Its just not
	* enforced explicitly in linux. But, here we impose
	* a limit of (STACK_SIZE - GUARD_SIZE) on the stack
	* region, since we can do this with our mmap.
	*
	* Our mmap with MAP_STACK takes addr as the maximum
	* downsize limit on BOS, and as len the max size of
	* the region. It them maps the top SGROWSIZ bytes,
	* and auto grows the region down, up to the limit
	* in addr.
	*
	* If we don't use the MAP_STACK option, the effect
	* of this code is to allocate a stack region of a
	* fixed size of (STACK_SIZE - GUARD_SIZE).
	*/

	if ((caddr_t)PTRIN(addr) + len > p->p_vmspace->vm_maxsaddr) {
	/*
	* Some linux apps will attempt to mmap
	* thread stacks near the top of their
	* address space. If their TOS is greater
	* than vm_maxsaddr, vm_map_growstack()
	* will confuse the thread stack with the
	* process stack and deliver a SEGV if they
	* attempt to grow the thread stack past their
	* current stacksize rlimit. To avoid this,
	* adjust vm_maxsaddr upwards to reflect
	* the current stacksize rlimit rather
	* than the maximum possible stacksize.
	* It would be better to adjust the
	* mmap'ed region, but some apps do not check
	* mmap's return value.
	*/
	PROC_LOCK(p);
	p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
	lim_cur(p, RLIMIT_STACK);
	PROC_UNLOCK(p);
	}

	/*
	* This gives us our maximum stack size and a new BOS.
	* If we're using VM_STACK, then mmap will just map
	* the top SGROWSIZ bytes, and let the stack grow down
	* to the limit at BOS. If we're not using VM_STACK
	* we map the full stack, since we don't have a way
	* to autogrow it.
	*/
	if (len > STACK_SIZE - GUARD_SIZE) {
	bsd_args.addr = (caddr_t)PTRIN(addr);
	bsd_args.len = len;
	} else {
	bsd_args.addr = (caddr_t)PTRIN(addr) -
	(STACK_SIZE - GUARD_SIZE - len);
	bsd_args.len = STACK_SIZE - GUARD_SIZE;
	}
	} else {
	bsd_args.addr = (caddr_t)PTRIN(addr);
	bsd_args.len = len;
	}
	bsd_args.pos = pos;

	#ifdef DEBUG
	if (ldebug(mmap))
	printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n",
	__func__,
	(void *)bsd_args.addr, bsd_args.len, bsd_args.prot,
	bsd_args.flags, bsd_args.fd, (int)bsd_args.pos);
	#endif
	error = mmap(td, &bsd_args);
	#ifdef DEBUG
	if (ldebug(mmap))
	printf("-> %s() return: 0x%x (0x%08x)\n",
	__func__, error, (u_int)td->td_retval[0]);
	#endif
	return (error);
	}

	int
	linux_mprotect(struct thread td, struct linux_mprotect_args uap)
	{
	struct mprotect_args bsd_args;

	bsd_args.addr = uap->addr;
	bsd_args.len = uap->len;
	bsd_args.prot = uap->prot;
	if (bsd_args.prot & (PROT_READ \| PROT_WRITE \| PROT_EXEC))
	bsd_args.prot \|= PROT_READ \| PROT_EXEC;
	return (mprotect(td, &bsd_args));
	}

	int
	linux_pipe(struct thread td, struct linux_pipe_args args)
	{
	int error;
	int fildes[2];

	#ifdef DEBUG
	if (ldebug(pipe))
	printf(ARGS(pipe, "*"));
	#endif

	error = kern_pipe(td, fildes);
	if (error)
	return (error);

	/* XXX: Close descriptors on error. */
	return (copyout(fildes, args->pipefds, sizeof fildes));
	}

	int
	linux_ioperm(struct thread td, struct linux_ioperm_args args)
	{
	int error;
	struct i386_ioperm_args iia;

	iia.start = args->start;
	iia.length = args->length;
	iia.enable = args->enable;
	error = i386_set_ioperm(td, &iia);
	return (error);
	}

	int
	linux_iopl(struct thread td, struct linux_iopl_args args)
	{
	int error;

	if (args->level < 0 \|\| args->level > 3)
	return (EINVAL);
	if ((error = priv_check(td, PRIV_IO)) != 0)
	return (error);
	if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
	return (error);
	td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) \|
	(args->level * (PSL_IOPL / 3));
	return (0);
	}

	int
	linux_modify_ldt(struct thread td, struct linux_modify_ldt_args uap)
	{
	int error;
	struct i386_ldt_args ldt;
	struct l_descriptor ld;
	union descriptor desc;
	int size, written;

	switch (uap->func) {
	case 0x00: /* read_ldt */
	ldt.start = 0;
	ldt.descs = uap->ptr;
	ldt.num = uap->bytecount / sizeof(union descriptor);
	error = i386_get_ldt(td, &ldt);
	td->td_retval[0] *= sizeof(union descriptor);
	break;
	case 0x02: /* read_default_ldt = 0 */
	size = 5*sizeof(struct l_desc_struct);
	if (size > uap->bytecount)
	size = uap->bytecount;
	for (written = error = 0; written < size && error == 0; written++)
	error = subyte((char *)uap->ptr + written, 0);
	td->td_retval[0] = written;
	break;
	case 0x01: /* write_ldt */
	case 0x11: /* write_ldt */
	if (uap->bytecount != sizeof(ld))
	return (EINVAL);

	error = copyin(uap->ptr, &ld, sizeof(ld));
	if (error)
	return (error);

	ldt.start = ld.entry_number;
	ldt.descs = &desc;
	ldt.num = 1;
	desc.sd.sd_lolimit = (ld.limit & 0x0000ffff);
	desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
	desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff);
	desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
	desc.sd.sd_type = SDT_MEMRO \| ((ld.read_exec_only ^ 1) << 1) \|
	(ld.contents << 2);
	desc.sd.sd_dpl = 3;
	desc.sd.sd_p = (ld.seg_not_present ^ 1);
	desc.sd.sd_xx = 0;
	desc.sd.sd_def32 = ld.seg_32bit;
	desc.sd.sd_gran = ld.limit_in_pages;
	error = i386_set_ldt(td, &ldt, &desc);
	break;
	default:
	error = ENOSYS;
	break;
	}

	if (error == EOPNOTSUPP) {
	printf("linux: modify_ldt needs kernel option USER_LDT\n");
	error = ENOSYS;
	}

	return (error);
	}

	int
	linux_sigaction(struct thread td, struct linux_sigaction_args args)
	{
	l_osigaction_t osa;
	l_sigaction_t act, oact;
	int error;

	#ifdef DEBUG
	if (ldebug(sigaction))
	printf(ARGS(sigaction, "%d, %p, %p"),
	args->sig, (void )args->nsa, (void )args->osa);
	#endif

	if (args->nsa != NULL) {
	error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
	if (error)
	return (error);
	act.lsa_handler = osa.lsa_handler;
	act.lsa_flags = osa.lsa_flags;
	act.lsa_restorer = osa.lsa_restorer;
	LINUX_SIGEMPTYSET(act.lsa_mask);
	act.lsa_mask.__bits[0] = osa.lsa_mask;
	}

	error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
	args->osa ? &oact : NULL);

	if (args->osa != NULL && !error) {
	osa.lsa_handler = oact.lsa_handler;
	osa.lsa_flags = oact.lsa_flags;
	osa.lsa_restorer = oact.lsa_restorer;
	osa.lsa_mask = oact.lsa_mask.__bits[0];
	error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
	}

	return (error);
	}

	/*
	* Linux has two extra args, restart and oldmask. We dont use these,
	* but it seems that "restart" is actually a context pointer that
	* enables the signal to happen with a different register set.
	*/
	int
	linux_sigsuspend(struct thread td, struct linux_sigsuspend_args args)
	{
	sigset_t sigmask;
	l_sigset_t mask;

	#ifdef DEBUG
	if (ldebug(sigsuspend))
	printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
	#endif

	LINUX_SIGEMPTYSET(mask);
	mask.__bits[0] = args->mask;
	linux_to_bsd_sigset(&mask, &sigmask);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_rt_sigsuspend(struct thread td, struct linux_rt_sigsuspend_args uap)
	{
	l_sigset_t lmask;
	sigset_t sigmask;
	int error;

	#ifdef DEBUG
	if (ldebug(rt_sigsuspend))
	printf(ARGS(rt_sigsuspend, "%p, %d"),
	(void *)uap->newset, uap->sigsetsize);
	#endif

	if (uap->sigsetsize != sizeof(l_sigset_t))
	return (EINVAL);

	error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
	if (error)
	return (error);

	linux_to_bsd_sigset(&lmask, &sigmask);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_pause(struct thread td, struct linux_pause_args args)
	{
	struct proc *p = td->td_proc;
	sigset_t sigmask;

	#ifdef DEBUG
	if (ldebug(pause))
	printf(ARGS(pause, ""));
	#endif

	PROC_LOCK(p);
	sigmask = td->td_sigmask;
	PROC_UNLOCK(p);
	return (kern_sigsuspend(td, sigmask));
	}

	int
	linux_sigaltstack(struct thread td, struct linux_sigaltstack_args uap)
	{
	stack_t ss, oss;
	l_stack_t lss;
	int error;

	#ifdef DEBUG
	if (ldebug(sigaltstack))
	printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
	#endif

	if (uap->uss != NULL) {
	error = copyin(uap->uss, &lss, sizeof(l_stack_t));
	if (error)
	return (error);

	ss.ss_sp = lss.ss_sp;
	ss.ss_size = lss.ss_size;
	ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
	}
	error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
	(uap->uoss != NULL) ? &oss : NULL);
	if (!error && uap->uoss != NULL) {
	lss.ss_sp = oss.ss_sp;
	lss.ss_size = oss.ss_size;
	lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
	error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
	}

	return (error);
	}

	int
	linux_ftruncate64(struct thread td, struct linux_ftruncate64_args args)
	{
	struct ftruncate_args sa;

	#ifdef DEBUG
	if (ldebug(ftruncate64))
	printf(ARGS(ftruncate64, "%u, %jd"), args->fd,
	(intmax_t)args->length);
	#endif

	sa.fd = args->fd;
	sa.length = args->length;
	return ftruncate(td, &sa);
	}

	int
	linux_set_thread_area(struct thread td, struct linux_set_thread_area_args args)
	{
	struct l_user_desc info;
	int error;
	int idx;
	int a[2];
	struct segment_descriptor sd;

	error = copyin(args->desc, &info, sizeof(struct l_user_desc));
	if (error)
	return (error);

	#ifdef DEBUG
	if (ldebug(set_thread_area))
	printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
	info.entry_number,
	info.base_addr,
	info.limit,
	info.seg_32bit,
	info.contents,
	info.read_exec_only,
	info.limit_in_pages,
	info.seg_not_present,
	info.useable);
	#endif

	idx = info.entry_number;
	/*
	* Semantics of linux version: every thread in the system has array of
	* 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This
	* syscall loads one of the selected tls decriptors with a value and
	* also loads GDT descriptors 6, 7 and 8 with the content of the
	* per-thread descriptors.
	*
	* Semantics of fbsd version: I think we can ignore that linux has 3
	* per-thread descriptors and use just the 1st one. The tls_array[]
	* is used only in set/get-thread_area() syscalls and for loading the
	* GDT descriptors. In fbsd we use just one GDT descriptor for TLS so
	* we will load just one.
	*
	* XXX: this doesn't work when a user space process tries to use more
	* than 1 TLS segment. Comment in the linux sources says wine might do
	* this.
	*/

	/*
	* we support just GLIBC TLS now
	* we should let 3 proceed as well because we use this segment so
	* if code does two subsequent calls it should succeed
	*/
	if (idx != 6 && idx != -1 && idx != 3)
	return (EINVAL);

	/*
	* we have to copy out the GDT entry we use
	* FreeBSD uses GDT entry #3 for storing %gs so load that
	*
	* XXX: what if a user space program doesn't check this value and tries
	* to use 6, 7 or 8?
	*/
	idx = info.entry_number = 3;
	error = copyout(&info, args->desc, sizeof(struct l_user_desc));
	if (error)
	return (error);

	if (LINUX_LDT_empty(&info)) {
	a[0] = 0;
	a[1] = 0;
	} else {
	a[0] = LINUX_LDT_entry_a(&info);
	a[1] = LINUX_LDT_entry_b(&info);
	}

	memcpy(&sd, &a, sizeof(a));
	#ifdef DEBUG
	if (ldebug(set_thread_area))
	printf("Segment created in set_thread_area: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
	sd.sd_hibase,
	sd.sd_lolimit,
	sd.sd_hilimit,
	sd.sd_type,
	sd.sd_dpl,
	sd.sd_p,
	sd.sd_xx,
	sd.sd_def32,
	sd.sd_gran);
	#endif

	/* this is taken from i386 version of cpu_set_user_tls() */
	critical_enter();
	/* set %gs */
	td->td_pcb->pcb_gsd = sd;
	PCPU_GET(fsgs_gdt)[1] = sd;
	load_gs(GSEL(GUGS_SEL, SEL_UPL));
	critical_exit();

	return (0);
	}

	int
	linux_get_thread_area(struct thread td, struct linux_get_thread_area_args args)
	{

	struct l_user_desc info;
	int error;
	int idx;
	struct l_desc_struct desc;
	struct segment_descriptor sd;

	#ifdef DEBUG
	if (ldebug(get_thread_area))
	printf(ARGS(get_thread_area, "%p"), args->desc);
	#endif

	error = copyin(args->desc, &info, sizeof(struct l_user_desc));
	if (error)
	return (error);

	idx = info.entry_number;
	/* XXX: I am not sure if we want 3 to be allowed too. */
	if (idx != 6 && idx != 3)
	return (EINVAL);

	idx = 3;

	memset(&info, 0, sizeof(info));

	sd = PCPU_GET(fsgs_gdt)[1];

	memcpy(&desc, &sd, sizeof(desc));

	info.entry_number = idx;
	info.base_addr = LINUX_GET_BASE(&desc);
	info.limit = LINUX_GET_LIMIT(&desc);
	info.seg_32bit = LINUX_GET_32BIT(&desc);
	info.contents = LINUX_GET_CONTENTS(&desc);
	info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
	info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
	info.seg_not_present = !LINUX_GET_PRESENT(&desc);
	info.useable = LINUX_GET_USEABLE(&desc);

	error = copyout(&info, args->desc, sizeof(struct l_user_desc));
	if (error)
	return (EFAULT);

	return (0);
	}

	/* copied from kern/kern_time.c */
	int
	linux_timer_create(struct thread td, struct linux_timer_create_args args)
	{
	return ktimer_create(td, (struct ktimer_create_args *) args);
	}

	int
	linux_timer_settime(struct thread td, struct linux_timer_settime_args args)
	{
	return ktimer_settime(td, (struct ktimer_settime_args *) args);
	}

	int
	linux_timer_gettime(struct thread td, struct linux_timer_gettime_args args)
	{
	return ktimer_gettime(td, (struct ktimer_gettime_args *) args);
	}

	int
	linux_timer_getoverrun(struct thread td, struct linux_timer_getoverrun_args args)
	{
	return ktimer_getoverrun(td, (struct ktimer_getoverrun_args *) args);
	}

	int
	linux_timer_delete(struct thread td, struct linux_timer_delete_args args)
	{
	return ktimer_delete(td, (struct ktimer_delete_args *) args);
	}

	/* XXX: this wont work with module - convert it */
	int
	linux_mq_open(struct thread td, struct linux_mq_open_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_open(td, (struct kmq_open_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_mq_unlink(struct thread td, struct linux_mq_unlink_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_unlink(td, (struct kmq_unlink_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_mq_timedsend(struct thread td, struct linux_mq_timedsend_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_timedsend(td, (struct kmq_timedsend_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_mq_timedreceive(struct thread td, struct linux_mq_timedreceive_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_timedreceive(td, (struct kmq_timedreceive_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_mq_notify(struct thread td, struct linux_mq_notify_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_notify(td, (struct kmq_notify_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_mq_getsetattr(struct thread td, struct linux_mq_getsetattr_args args)
	{
	#ifdef P1003_1B_MQUEUE
	return kmq_setattr(td, (struct kmq_setattr_args *) args);
	#else
	return (ENOSYS);
	#endif
	}

	int
	linux_wait4(struct thread td, struct linux_wait4_args args)
	{
	int error, options;
	struct rusage ru, *rup;

	#ifdef DEBUG
	if (ldebug(wait4))
	printf(ARGS(wait4, "%d, %p, %d, %p"),
	args->pid, (void *)args->status, args->options,
	(void *)args->rusage);
	#endif

	options = (args->options & (WNOHANG \| WUNTRACED));
	/* WLINUXCLONE should be equal to __WCLONE, but we make sure */
	if (args->options & __WCLONE)
	options \|= WLINUXCLONE;

	if (args->rusage != NULL)
	rup = &ru;
	else
	rup = NULL;
	error = linux_common_wait(td, args->pid, args->status, options, rup);
	if (error)
	return (error);
	if (args->rusage != NULL)
	error = copyout(&ru, args->rusage, sizeof(ru));

	return (error);
	}
	Index: stable/8/sys
	===================================================================
	--- stable/8/sys (revision 219190)
	+++ stable/8/sys (revision 219191)

	Property changes on: stable/8/sys
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys:r218612

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