aa9a60640e
structs and prototypes for syscalls. Ifdefed duplicated decentralized declarations of args structs. It's convenient to have this visible but they are hard to maintain. Some are already different from the central declarations. 4.4lite2 puts them in comments in the function headers but I wanted to avoid the large changes for that.
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: vm_unix.c 1.1 89/11/07$
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*
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* @(#)vm_unix.c 8.1 (Berkeley) 6/11/93
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* $Id: vm_unix.c,v 1.7 1995/11/11 06:40:35 bde Exp $
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*/
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/*
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* Traditional sbrk/grow interface to VM
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <vm/vm.h>
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#include <vm/swap_pager.h>
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#ifndef _SYS_SYSPROTO_H_
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struct obreak_args {
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char *nsize;
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};
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#endif
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/* ARGSUSED */
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int
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obreak(p, uap, retval)
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struct proc *p;
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struct obreak_args *uap;
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int *retval;
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{
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register struct vmspace *vm = p->p_vmspace;
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vm_offset_t new, old;
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int rv;
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register int diff;
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old = (vm_offset_t) vm->vm_daddr;
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new = round_page(uap->nsize);
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if ((int) (new - old) > p->p_rlimit[RLIMIT_DATA].rlim_cur)
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return (ENOMEM);
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old = round_page(old + ctob(vm->vm_dsize));
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diff = new - old;
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if (diff > 0) {
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if (swap_pager_full) {
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return (ENOMEM);
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}
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rv = vm_map_find(&vm->vm_map, NULL, 0, &old, diff, FALSE);
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if (rv != KERN_SUCCESS) {
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return (ENOMEM);
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}
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vm->vm_dsize += btoc(diff);
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} else if (diff < 0) {
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diff = -diff;
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rv = vm_map_remove(&vm->vm_map, new, new + diff);
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if (rv != KERN_SUCCESS) {
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return (ENOMEM);
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}
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vm->vm_dsize -= btoc(diff);
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}
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return (0);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct ovadvise_args {
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int anom;
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};
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#endif
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/* ARGSUSED */
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int
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ovadvise(p, uap, retval)
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struct proc *p;
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struct ovadvise_args *uap;
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int *retval;
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{
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return (EINVAL);
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}
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