remove the Linux emulation code, no longer referenced by anything

1 files changed, 0 insertions, 414 deletions

diff --git a/sys/compat/linux/linux_sched.c b/sys/compat/linux/linux_sched.c
deleted file mode 100644
index f71820b4818..00000000000
--- a/sys/compat/linux/linux_sched.c
+++ /dev/null
@@ -1,414 +0,0 @@
-/*	$OpenBSD: linux_sched.c,v 1.18 2014/07/09 14:42:53 guenther Exp $	*/
-/*	$NetBSD: linux_sched.c,v 1.6 2000/05/28 05:49:05 thorpej Exp $	*/
-
-/*-
- * Copyright (c) 1999 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
- * NASA Ames Research Center; by Matthias Scheler.
- *
- * 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 scheduler related syscalls.
- */
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/mount.h>
-#include <sys/proc.h>
-#include <sys/systm.h>
-#include <sys/syscallargs.h>
-#include <sys/signalvar.h>
-
-#include <machine/cpu.h>
-#include <machine/pcb.h>
-#include <machine/linux_machdep.h>
-
-#include <compat/linux/linux_emuldata.h>
-#include <compat/linux/linux_types.h>
-#include <compat/linux/linux_sched.h>
-#include <compat/linux/linux_signal.h>
-#include <compat/linux/linux_syscallargs.h>
-
-void linux_child_return(void *);
-
-int
-linux_sys_clone(struct proc *p, void *v, register_t *retval)
-{
-	struct linux_sys_clone_args *uap = v;
-	struct linux_emuldata *emul = p->p_emuldata;
-	int cflags = SCARG(uap, flags);
-	int flags = FORK_TFORK;
-	int error = 0;
-
-	/*
-	 * We only support certain bits.  The Linux crew keep adding more,
-	 * so let's test for anything outside of what we support and complain
-	 * about them.  Not everything in this list is completely supported,
-	 * they just aren't _always_ an error.
-	 */
-	if (cflags & ~(LINUX_CLONE_CSIGNAL | LINUX_CLONE_VM | LINUX_CLONE_FS |
-	    LINUX_CLONE_FILES | LINUX_CLONE_SIGHAND | LINUX_CLONE_VFORK |
-	    LINUX_CLONE_PARENT | LINUX_CLONE_THREAD | LINUX_CLONE_SYSVSEM |
-	    LINUX_CLONE_DETACHED | LINUX_CLONE_UNTRACED | LINUX_CLONE_SETTLS |
-	    LINUX_CLONE_PARENT_SETTID | LINUX_CLONE_CHILD_CLEARTID |
-	    LINUX_CLONE_CHILD_SETTID))
-		return (EINVAL);
-
-	if (cflags & LINUX_CLONE_VM)
-		flags |= FORK_SHAREVM;
-	if (cflags & LINUX_CLONE_FILES)
-		flags |= FORK_SHAREFILES;
-	if (cflags & LINUX_CLONE_SIGHAND) {
-		/* According to Linux, CLONE_SIGHAND requires CLONE_VM */
-		if ((cflags & LINUX_CLONE_VM) == 0)
-			return (EINVAL);
-		flags |= FORK_SIGHAND;
-	}
-	if (cflags & LINUX_CLONE_VFORK)
-		flags |= FORK_PPWAIT;
-	if (cflags & LINUX_CLONE_THREAD) {
-		/*
-		 * Linux agrees with us: CLONE_THREAD requires
-		 * CLONE_SIGHAND.  Unlike Linux, we also also require
-		 * CLONE_FS and CLONE_SYSVSEM.  Also, we decree it
-		 * to be incompatible with CLONE_VFORK, as I don't
-		 * want to work out whether that's 100% safe.
-		 * Requires CLONE_FILES so that the rest of the kernel
-		 * can assume that threads share an fd table.
-		 */
-#define REQUIRED	\
-	( LINUX_CLONE_SIGHAND \
-	| LINUX_CLONE_FS \
-	| LINUX_CLONE_SYSVSEM \
-	| LINUX_CLONE_FILES \
-	)
-#define BANNED		\
-	LINUX_CLONE_VFORK
-		if ((cflags & (REQUIRED | BANNED)) != REQUIRED)
-			return (EINVAL);
-		flags |= FORK_THREAD;
-	} else {
-		/*
-		 * These are only supported with CLONE_THREAD.  Arguably,
-		 * CLONE_FS should be in this list, because we don't
-		 * support sharing of working directory and root directory
-		 * (chdir + chroot) except via threads.  On the other
-		 * hand, we tie the sharing of umask to the sharing of
-		 * files, so a process that doesn't request CLONE_FS but
-		 * does ask for CLONE_FILES is going to get some of the
-		 * former's effect.  Some programs (e.g., Opera) at least
-		 * _seem_ to work if we let it through, so we'll just
-		 * cross our fingers for now and silently ignore it if
-		 * CLONE_FILES was also requested.
-		 */
-		if (cflags & (LINUX_CLONE_PARENT | LINUX_CLONE_SYSVSEM))
-			return (EINVAL);
-		if ((cflags & (LINUX_CLONE_FS | LINUX_CLONE_FILES)) ==
-		    LINUX_CLONE_FS)
-			return (EINVAL);
-
-		/* We don't support alternate exit signals. */
-		if ((cflags & LINUX_CLONE_CSIGNAL) != LINUX_SIGCHLD)
-			return (EINVAL);
-	}
-	/*
-	 * Since we don't support CLONE_PTRACE, the CLONE_UNTRACED
-	 * flag can be silently ignored.  CLONE_DETACHED is always
-	 * ignored by Linux.
-	 */
-	if (cflags & LINUX_CLONE_CHILD_SETTID)
-		emul->child_set_tid = SCARG(uap, child_tidptr);
-	else
-		emul->child_set_tid = NULL;
-
-	if (cflags & LINUX_CLONE_CHILD_CLEARTID)
-		emul->child_clear_tid = SCARG(uap, child_tidptr);
-	else
-		emul->child_clear_tid = NULL;
-
-	if (cflags & LINUX_CLONE_PARENT_SETTID)
-		if (SCARG(uap, parent_tidptr) == NULL)
-			return (EINVAL);
-
-	if (cflags & LINUX_CLONE_SETTLS) {
-		struct l_segment_descriptor ldesc;
-
-		error = copyin(SCARG(uap, tls), &ldesc, sizeof(ldesc));
-		if (error)
-			return (error);
-
-		if (ldesc.entry_number != GUGS_SEL)
-			return (EINVAL);
-		emul->child_tls_base = ldesc.base_addr;
-		emul->set_tls_base = 1;
-	}
-	else
-		emul->set_tls_base = 0;
-
-	error = fork1(p, flags, SCARG(uap, stack), 0, linux_child_return,
-	    NULL, retval, NULL);
-	if (error)
-		return error;
-
-	if (cflags & LINUX_CLONE_PARENT_SETTID) {
-		pid_t pid = retval[0];
-
-		error = copyout(&pid, SCARG(uap, parent_tidptr), sizeof(pid));
-	}
-	return (error);
-}
-
-int
-linux_sys_sched_setparam(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_setparam_args /* {
-		syscallarg(linux_pid_t) pid;
-		syscallarg(const struct linux_sched_param *) sp;
-	} */ *uap = v;
-	int error;
-	struct linux_sched_param lp;
-	struct proc *p;
-
-	/*
-	 * We only check for valid parameters and return afterwards.
-	 */
-
-	if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
-		return (EINVAL);
-
-	error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
-	if (error)
-		return (error);
-
-	if (SCARG(uap, pid) != 0) {
-		struct ucred *uc = cp->p_ucred;
-
-		if ((p = pfind(SCARG(uap, pid))) == NULL)
-			return (ESRCH);
-		if (!(cp == p ||
-		      uc->cr_uid == 0 ||
-		      uc->cr_ruid == p->p_ucred->cr_ruid ||
-		      uc->cr_uid == p->p_ucred->cr_ruid ||
-		      uc->cr_ruid == p->p_ucred->cr_uid ||
-		      uc->cr_uid == p->p_ucred->cr_uid))
-			return (EPERM);
-	}
-
-	return (0);
-}
-
-int
-linux_sys_sched_getparam(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_getparam_args /* {
-		syscallarg(linux_pid_t) pid;
-		syscallarg(struct linux_sched_param *) sp;
-	} */ *uap = v;
-	struct proc *p;
-	struct linux_sched_param lp;
-
-	/*
-	 * We only check for valid parameters and return a dummy priority
-	 * afterwards.
-	 */
-	if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
-		return (EINVAL);
-
-	if (SCARG(uap, pid) != 0) {
-		struct ucred *uc = cp->p_ucred;
-
-		if ((p = pfind(SCARG(uap, pid))) == NULL)
-			return (ESRCH);
-		if (!(cp == p ||
-		      uc->cr_uid == 0 ||
-		      uc->cr_ruid == p->p_ucred->cr_ruid ||
-		      uc->cr_uid == p->p_ucred->cr_ruid ||
-		      uc->cr_ruid == p->p_ucred->cr_uid ||
-		      uc->cr_uid == p->p_ucred->cr_uid))
-			return (EPERM);
-	}
-
-	lp.sched_priority = 0;
-	return (copyout(&lp, SCARG(uap, sp), sizeof lp));
-}
-
-int
-linux_sys_sched_setscheduler(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_setscheduler_args /* {
-		syscallarg(linux_pid_t) pid;
-		syscallarg(int) policy;
-		syscallarg(cont struct linux_sched_scheduler *) sp;
-	} */ *uap = v;
-	int error;
-	struct linux_sched_param lp;
-	struct proc *p;
-
-	/*
-	 * We only check for valid parameters and return afterwards.
-	 */
-
-	if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
-		return (EINVAL);
-
-	error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
-	if (error)
-		return (error);
-
-	if (SCARG(uap, pid) != 0) {
-		struct ucred *uc = cp->p_ucred;
-
-		if ((p = pfind(SCARG(uap, pid))) == NULL)
-			return (ESRCH);
-		if (!(cp == p ||
-		      uc->cr_uid == 0 ||
-		      uc->cr_ruid == p->p_ucred->cr_ruid ||
-		      uc->cr_uid == p->p_ucred->cr_ruid ||
-		      uc->cr_ruid == p->p_ucred->cr_uid ||
-		      uc->cr_uid == p->p_ucred->cr_uid))
-			return (EPERM);
-	}
-
-	/*
-	 * We can't emulate anything but the default scheduling policy.
-	 */
-	if (SCARG(uap, policy) != LINUX_SCHED_OTHER || lp.sched_priority != 0)
-		return (EINVAL);
-
-	return (0);
-}
-
-int
-linux_sys_sched_getscheduler(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_getscheduler_args /* {
-		syscallarg(linux_pid_t) pid;
-	} */ *uap = v;
-	struct proc *p;
-
-	*retval = -1;
-
-	/*
-	 * We only check for valid parameters and return afterwards.
-	 */
-
-	if (SCARG(uap, pid) != 0) {
-		struct ucred *uc = cp->p_ucred;
-
-		if ((p = pfind(SCARG(uap, pid))) == NULL)
-			return (ESRCH);
-		if (!(cp == p ||
-		      uc->cr_uid == 0 ||
-		      uc->cr_ruid == p->p_ucred->cr_ruid ||
-		      uc->cr_uid == p->p_ucred->cr_ruid ||
-		      uc->cr_ruid == p->p_ucred->cr_uid ||
-		      uc->cr_uid == p->p_ucred->cr_uid))
-			return (EPERM);
-	}
-
-	/*
-	 * We can't emulate anything but the default scheduling policy.
-	 */
-	*retval = LINUX_SCHED_OTHER;
-	return (0);
-}
-
-int
-linux_sys_sched_yield(struct proc *cp, void *v, register_t *retval)
-{
-	need_resched(curcpu());
-	return (0);
-}
-
-int
-linux_sys_sched_get_priority_max(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_get_priority_max_args /* {
-		syscallarg(int) policy;
-	} */ *uap = v;
-
-	/*
-	 * We can't emulate anything but the default scheduling policy.
-	 */
-	if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
-		*retval = -1;
-		return (EINVAL);
-	}
-
-	*retval = 0;
-	return (0);
-}
-
-int
-linux_sys_sched_get_priority_min(struct proc *cp, void *v, register_t *retval)
-{
-	struct linux_sys_sched_get_priority_min_args /* {
-		syscallarg(int) policy;
-	} */ *uap = v;
-
-	/*
-	 * We can't emulate anything but the default scheduling policy.
-	 */
-	if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
-		*retval = -1;
-		return (EINVAL);
-	}
-
-	*retval = 0;
-	return (0);
-}
-
-int
-linux_sys_set_tid_address(struct proc *p, void *v, register_t *retval)
-{
-	struct linux_sys_set_tid_address_args *uap = v;
-	struct linux_emuldata *emul = p->p_emuldata;
-
-	emul->my_clear_tid = SCARG(uap, tidptr);
-
-	*retval = p->p_p->ps_pid;
-	return 0;
-}
-
-void
-linux_child_return(void *arg)
-{
-	struct proc *p = (struct proc *)arg;
-	struct linux_emuldata *emul = p->p_emuldata;
-
-	if (emul->set_tls_base)
-		i386_set_threadbase(p, emul->my_tls_base, TSEG_GS);
-
-	if (emul->my_set_tid) {
-		pid_t pid = p->p_pid + THREAD_PID_OFFSET;
-
-		if (copyout(&pid, emul->my_set_tid, sizeof(pid)))
-			psignal(p, SIGSEGV);
-	}
-
-	child_return(p);
-}