160727d8bSWarner Losh /*- 2df8bae1dSRodney W. Grimes * Copyright (c) 1988 University of Utah. 3df8bae1dSRodney W. Grimes * Copyright (c) 1991, 1993 4df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 5df8bae1dSRodney W. Grimes * 6df8bae1dSRodney W. Grimes * This code is derived from software contributed to Berkeley by 7df8bae1dSRodney W. Grimes * the Systems Programming Group of the University of Utah Computer 8df8bae1dSRodney W. Grimes * Science Department. 9df8bae1dSRodney W. Grimes * 10df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 11df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 12df8bae1dSRodney W. Grimes * are met: 13df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 14df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 15df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 16df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 17df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 18df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 19df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 20df8bae1dSRodney W. Grimes * without specific prior written permission. 21df8bae1dSRodney W. Grimes * 22df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32df8bae1dSRodney W. Grimes * SUCH DAMAGE. 33df8bae1dSRodney W. Grimes * 34df8bae1dSRodney W. Grimes * from: Utah $Hdr: vm_unix.c 1.1 89/11/07$ 35df8bae1dSRodney W. Grimes * 36df8bae1dSRodney W. Grimes * @(#)vm_unix.c 8.1 (Berkeley) 6/11/93 37df8bae1dSRodney W. Grimes */ 38df8bae1dSRodney W. Grimes 39*5f816602SMarcel Moolenaar #include "opt_compat.h" 40*5f816602SMarcel Moolenaar 41df8bae1dSRodney W. Grimes /* 42df8bae1dSRodney W. Grimes * Traditional sbrk/grow interface to VM 43df8bae1dSRodney W. Grimes */ 44190609ddSJohn Baldwin 45874651b1SDavid E. O'Brien #include <sys/cdefs.h> 46874651b1SDavid E. O'Brien __FBSDID("$FreeBSD$"); 47874651b1SDavid E. O'Brien 48df8bae1dSRodney W. Grimes #include <sys/param.h> 49fb919e4dSMark Murray #include <sys/lock.h> 5086e92ee7SJohn Baldwin #include <sys/mutex.h> 51df8bae1dSRodney W. Grimes #include <sys/proc.h> 521ba5ad42SEdward Tomasz Napierala #include <sys/racct.h> 53df8bae1dSRodney W. Grimes #include <sys/resourcevar.h> 54*5f816602SMarcel Moolenaar #include <sys/sysent.h> 5586e92ee7SJohn Baldwin #include <sys/sysproto.h> 5623955314SAlfred Perlstein #include <sys/systm.h> 57df8bae1dSRodney W. Grimes 58df8bae1dSRodney W. Grimes #include <vm/vm.h> 59efeaf95aSDavid Greenman #include <vm/vm_param.h> 60efeaf95aSDavid Greenman #include <vm/pmap.h> 61efeaf95aSDavid Greenman #include <vm/vm_map.h> 6226f9a767SRodney W. Grimes 63d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_ 64df8bae1dSRodney W. Grimes struct obreak_args { 659ed1bde7SBruce Evans char *nsize; 66df8bae1dSRodney W. Grimes }; 67d2d3e875SBruce Evans #endif 6826f9a767SRodney W. Grimes 696a33d53cSMatthew Dillon /* 706a33d53cSMatthew Dillon * MPSAFE 716a33d53cSMatthew Dillon */ 72df8bae1dSRodney W. Grimes /* ARGSUSED */ 73df8bae1dSRodney W. Grimes int 748451d0ddSKip Macy sys_obreak(td, uap) 75b40ce416SJulian Elischer struct thread *td; 76df8bae1dSRodney W. Grimes struct obreak_args *uap; 77df8bae1dSRodney W. Grimes { 78b40ce416SJulian Elischer struct vmspace *vm = td->td_proc->p_vmspace; 79f0e2953eSJohn Dyson vm_offset_t new, old, base; 8091d5354aSJohn Baldwin rlim_t datalim, vmemlim; 81*5f816602SMarcel Moolenaar int prot, rv; 820cddd8f0SMatthew Dillon int error = 0; 83abd498aaSBruce M Simpson boolean_t do_map_wirefuture; 840cddd8f0SMatthew Dillon 8591d5354aSJohn Baldwin PROC_LOCK(td->td_proc); 8691d5354aSJohn Baldwin datalim = lim_cur(td->td_proc, RLIMIT_DATA); 8791d5354aSJohn Baldwin vmemlim = lim_cur(td->td_proc, RLIMIT_VMEM); 8891d5354aSJohn Baldwin PROC_UNLOCK(td->td_proc); 8991d5354aSJohn Baldwin 90abd498aaSBruce M Simpson do_map_wirefuture = FALSE; 915375be18SAlan Cox new = round_page((vm_offset_t)uap->nsize); 925375be18SAlan Cox vm_map_lock(&vm->vm_map); 93df8bae1dSRodney W. Grimes 94f0e2953eSJohn Dyson base = round_page((vm_offset_t) vm->vm_daddr); 95a77c9610SDavid Malone old = base + ctob(vm->vm_dsize); 96f0e2953eSJohn Dyson if (new > base) { 97a77c9610SDavid Malone /* 983d66f138SAlan Cox * Check the resource limit, but allow a process to reduce 993d66f138SAlan Cox * its usage, even if it remains over the limit. 100a77c9610SDavid Malone */ 10191d5354aSJohn Baldwin if (new - base > datalim && new > old) { 1020cddd8f0SMatthew Dillon error = ENOMEM; 1030cddd8f0SMatthew Dillon goto done; 1040cddd8f0SMatthew Dillon } 10505ba50f5SJake Burkholder if (new > vm_map_max(&vm->vm_map)) { 1060cddd8f0SMatthew Dillon error = ENOMEM; 1070cddd8f0SMatthew Dillon goto done; 1080cddd8f0SMatthew Dillon } 109f0e2953eSJohn Dyson } else if (new < base) { 110f0e2953eSJohn Dyson /* 111f0e2953eSJohn Dyson * This is simply an invalid value. If someone wants to 112f0e2953eSJohn Dyson * do fancy address space manipulations, mmap and munmap 113f0e2953eSJohn Dyson * can do most of what the user would want. 114f0e2953eSJohn Dyson */ 1150cddd8f0SMatthew Dillon error = EINVAL; 1160cddd8f0SMatthew Dillon goto done; 117f0e2953eSJohn Dyson } 118f0e2953eSJohn Dyson if (new > old) { 11991d5354aSJohn Baldwin if (vm->vm_map.size + (new - old) > vmemlim) { 120070f64feSMatthew Dillon error = ENOMEM; 121070f64feSMatthew Dillon goto done; 122070f64feSMatthew Dillon } 123afcc55f3SEdward Tomasz Napierala #ifdef RACCT 1241ba5ad42SEdward Tomasz Napierala PROC_LOCK(td->td_proc); 1251ba5ad42SEdward Tomasz Napierala error = racct_set(td->td_proc, RACCT_DATA, new - base); 1261ba5ad42SEdward Tomasz Napierala if (error != 0) { 1271ba5ad42SEdward Tomasz Napierala PROC_UNLOCK(td->td_proc); 1281ba5ad42SEdward Tomasz Napierala error = ENOMEM; 1291ba5ad42SEdward Tomasz Napierala goto done; 1301ba5ad42SEdward Tomasz Napierala } 1311ba5ad42SEdward Tomasz Napierala error = racct_set(td->td_proc, RACCT_VMEM, 1321ba5ad42SEdward Tomasz Napierala vm->vm_map.size + (new - old)); 1331ba5ad42SEdward Tomasz Napierala if (error != 0) { 1341ba5ad42SEdward Tomasz Napierala racct_set_force(td->td_proc, RACCT_DATA, old - base); 1351ba5ad42SEdward Tomasz Napierala PROC_UNLOCK(td->td_proc); 1361ba5ad42SEdward Tomasz Napierala error = ENOMEM; 1371ba5ad42SEdward Tomasz Napierala goto done; 1381ba5ad42SEdward Tomasz Napierala } 1391ba5ad42SEdward Tomasz Napierala PROC_UNLOCK(td->td_proc); 140afcc55f3SEdward Tomasz Napierala #endif 141*5f816602SMarcel Moolenaar prot = VM_PROT_RW; 142*5f816602SMarcel Moolenaar #ifdef COMPAT_FREEBSD32 143*5f816602SMarcel Moolenaar #if defined(__amd64__) || defined(__ia64__) 144*5f816602SMarcel Moolenaar if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) 145*5f816602SMarcel Moolenaar prot |= VM_PROT_EXECUTE; 146*5f816602SMarcel Moolenaar #endif 147*5f816602SMarcel Moolenaar #endif 1485375be18SAlan Cox rv = vm_map_insert(&vm->vm_map, NULL, 0, old, new, 149*5f816602SMarcel Moolenaar prot, VM_PROT_ALL, 0); 150df8bae1dSRodney W. Grimes if (rv != KERN_SUCCESS) { 151afcc55f3SEdward Tomasz Napierala #ifdef RACCT 1521ba5ad42SEdward Tomasz Napierala PROC_LOCK(td->td_proc); 1531ba5ad42SEdward Tomasz Napierala racct_set_force(td->td_proc, RACCT_DATA, old - base); 1541ba5ad42SEdward Tomasz Napierala racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size); 1551ba5ad42SEdward Tomasz Napierala PROC_UNLOCK(td->td_proc); 156afcc55f3SEdward Tomasz Napierala #endif 1570cddd8f0SMatthew Dillon error = ENOMEM; 1580cddd8f0SMatthew Dillon goto done; 159df8bae1dSRodney W. Grimes } 1605375be18SAlan Cox vm->vm_dsize += btoc(new - old); 161abd498aaSBruce M Simpson /* 162abd498aaSBruce M Simpson * Handle the MAP_WIREFUTURE case for legacy applications, 163abd498aaSBruce M Simpson * by marking the newly mapped range of pages as wired. 164abd498aaSBruce M Simpson * We are not required to perform a corresponding 165abd498aaSBruce M Simpson * vm_map_unwire() before vm_map_delete() below, as 166abd498aaSBruce M Simpson * it will forcibly unwire the pages in the range. 167abd498aaSBruce M Simpson * 168abd498aaSBruce M Simpson * XXX If the pages cannot be wired, no error is returned. 169abd498aaSBruce M Simpson */ 170abd498aaSBruce M Simpson if ((vm->vm_map.flags & MAP_WIREFUTURE) == MAP_WIREFUTURE) { 171abd498aaSBruce M Simpson if (bootverbose) 172abd498aaSBruce M Simpson printf("obreak: MAP_WIREFUTURE set\n"); 173abd498aaSBruce M Simpson do_map_wirefuture = TRUE; 174abd498aaSBruce M Simpson } 175f0e2953eSJohn Dyson } else if (new < old) { 176655c3490SKonstantin Belousov rv = vm_map_delete(&vm->vm_map, new, old); 177df8bae1dSRodney W. Grimes if (rv != KERN_SUCCESS) { 1780cddd8f0SMatthew Dillon error = ENOMEM; 1790cddd8f0SMatthew Dillon goto done; 180df8bae1dSRodney W. Grimes } 181f0e2953eSJohn Dyson vm->vm_dsize -= btoc(old - new); 182afcc55f3SEdward Tomasz Napierala #ifdef RACCT 1831ba5ad42SEdward Tomasz Napierala PROC_LOCK(td->td_proc); 1841ba5ad42SEdward Tomasz Napierala racct_set_force(td->td_proc, RACCT_DATA, new - base); 1851ba5ad42SEdward Tomasz Napierala racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size); 1861ba5ad42SEdward Tomasz Napierala PROC_UNLOCK(td->td_proc); 187afcc55f3SEdward Tomasz Napierala #endif 188bb10bb49SJohn Baldwin } 1890cddd8f0SMatthew Dillon done: 1905375be18SAlan Cox vm_map_unlock(&vm->vm_map); 191abd498aaSBruce M Simpson 192abd498aaSBruce M Simpson if (do_map_wirefuture) 193abd498aaSBruce M Simpson (void) vm_map_wire(&vm->vm_map, old, new, 194abd498aaSBruce M Simpson VM_MAP_WIRE_USER|VM_MAP_WIRE_NOHOLES); 195abd498aaSBruce M Simpson 1960cddd8f0SMatthew Dillon return (error); 197df8bae1dSRodney W. Grimes } 198df8bae1dSRodney W. Grimes 199d2d3e875SBruce Evans #ifndef _SYS_SYSPROTO_H_ 200df8bae1dSRodney W. Grimes struct ovadvise_args { 201df8bae1dSRodney W. Grimes int anom; 202df8bae1dSRodney W. Grimes }; 203d2d3e875SBruce Evans #endif 20426f9a767SRodney W. Grimes 2056a33d53cSMatthew Dillon /* 2066a33d53cSMatthew Dillon * MPSAFE 2076a33d53cSMatthew Dillon */ 208df8bae1dSRodney W. Grimes /* ARGSUSED */ 209df8bae1dSRodney W. Grimes int 2108451d0ddSKip Macy sys_ovadvise(td, uap) 211b40ce416SJulian Elischer struct thread *td; 212df8bae1dSRodney W. Grimes struct ovadvise_args *uap; 213df8bae1dSRodney W. Grimes { 2140cddd8f0SMatthew Dillon /* START_GIANT_OPTIONAL */ 2150cddd8f0SMatthew Dillon /* END_GIANT_OPTIONAL */ 216df8bae1dSRodney W. Grimes return (EINVAL); 217df8bae1dSRodney W. Grimes } 218