1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: vm_unix.c 1.1 89/11/07$ 39 * 40 * @(#)vm_unix.c 8.1 (Berkeley) 6/11/93 41 * $Id: vm_unix.c,v 1.3 1994/08/02 07:55:41 davidg Exp $ 42 */ 43 44 /* 45 * Traditional sbrk/grow interface to VM 46 */ 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/proc.h> 50 #include <sys/resourcevar.h> 51 52 #include <vm/vm.h> 53 54 extern int swap_pager_full; 55 56 struct obreak_args { 57 char *nsiz; 58 }; 59 60 /* ARGSUSED */ 61 int 62 obreak(p, uap, retval) 63 struct proc *p; 64 struct obreak_args *uap; 65 int *retval; 66 { 67 register struct vmspace *vm = p->p_vmspace; 68 vm_offset_t new, old; 69 int rv; 70 register int diff; 71 72 old = (vm_offset_t) vm->vm_daddr; 73 new = round_page(uap->nsiz); 74 if ((int) (new - old) > p->p_rlimit[RLIMIT_DATA].rlim_cur) 75 return (ENOMEM); 76 old = round_page(old + ctob(vm->vm_dsize)); 77 diff = new - old; 78 if (diff > 0) { 79 if (swap_pager_full) { 80 return (ENOMEM); 81 } 82 rv = vm_allocate(&vm->vm_map, &old, diff, FALSE); 83 if (rv != KERN_SUCCESS) { 84 return (ENOMEM); 85 } 86 vm->vm_dsize += btoc(diff); 87 } else if (diff < 0) { 88 diff = -diff; 89 rv = vm_deallocate(&vm->vm_map, new, diff); 90 if (rv != KERN_SUCCESS) { 91 return (ENOMEM); 92 } 93 vm->vm_dsize -= btoc(diff); 94 } 95 return (0); 96 } 97 98 struct ovadvise_args { 99 int anom; 100 }; 101 102 /* ARGSUSED */ 103 int 104 ovadvise(p, uap, retval) 105 struct proc *p; 106 struct ovadvise_args *uap; 107 int *retval; 108 { 109 110 return (EINVAL); 111 } 112