| vm_fault.c (94912) | vm_fault.c (94977) |
|---|---|
| 1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1994 John S. Dyson 5 * All rights reserved. 6 * Copyright (c) 1994 David Greenman 7 * All rights reserved. 8 * --- 52 unchanged lines hidden (view full) --- 61 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 62 * School of Computer Science 63 * Carnegie Mellon University 64 * Pittsburgh PA 15213-3890 65 * 66 * any improvements or extensions that they make and grant Carnegie the 67 * rights to redistribute these changes. 68 * | 1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1994 John S. Dyson 5 * All rights reserved. 6 * Copyright (c) 1994 David Greenman 7 * All rights reserved. 8 * --- 52 unchanged lines hidden (view full) --- 61 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 62 * School of Computer Science 63 * Carnegie Mellon University 64 * Pittsburgh PA 15213-3890 65 * 66 * any improvements or extensions that they make and grant Carnegie the 67 * rights to redistribute these changes. 68 * |
| 69 * $FreeBSD: head/sys/vm/vm_fault.c 94912 2002-04-17 02:23:57Z alc $ | 69 * $FreeBSD: head/sys/vm/vm_fault.c 94977 2002-04-18 03:28:27Z alc $ |
| 70 */ 71 72/* 73 * Page fault handling module. 74 */ 75#include <sys/param.h> 76#include <sys/systm.h> 77#include <sys/kernel.h> --- 120 unchanged lines hidden (view full) --- 198} 199 200static int 201vm_fault1(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 202 int fault_flags) 203{ 204 vm_prot_t prot; 205 int result; | 70 */ 71 72/* 73 * Page fault handling module. 74 */ 75#include <sys/param.h> 76#include <sys/systm.h> 77#include <sys/kernel.h> --- 120 unchanged lines hidden (view full) --- 198} 199 200static int 201vm_fault1(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, 202 int fault_flags) 203{ 204 vm_prot_t prot; 205 int result; |
| 206 boolean_t wired; | 206 boolean_t growstack, wired; |
| 207 int map_generation; 208 vm_object_t next_object; 209 vm_page_t marray[VM_FAULT_READ]; 210 int hardfault; 211 int faultcount; 212 struct faultstate fs; 213 214 GIANT_REQUIRED; 215 216 cnt.v_vm_faults++; 217 hardfault = 0; | 207 int map_generation; 208 vm_object_t next_object; 209 vm_page_t marray[VM_FAULT_READ]; 210 int hardfault; 211 int faultcount; 212 struct faultstate fs; 213 214 GIANT_REQUIRED; 215 216 cnt.v_vm_faults++; 217 hardfault = 0; |
| 218 growstack = TRUE; |
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| 218 219RetryFault:; 220 221 /* 222 * Find the backing store object and offset into it to begin the 223 * search. 224 */ 225 fs.map = map; 226 if ((result = vm_map_lookup(&fs.map, vaddr, 227 fault_type, &fs.entry, &fs.first_object, 228 &fs.first_pindex, &prot, &wired)) != KERN_SUCCESS) { 229 if ((result != KERN_PROTECTION_FAILURE) || 230 ((fault_flags & VM_FAULT_WIRE_MASK) != VM_FAULT_USER_WIRE)) { | 219 220RetryFault:; 221 222 /* 223 * Find the backing store object and offset into it to begin the 224 * search. 225 */ 226 fs.map = map; 227 if ((result = vm_map_lookup(&fs.map, vaddr, 228 fault_type, &fs.entry, &fs.first_object, 229 &fs.first_pindex, &prot, &wired)) != KERN_SUCCESS) { 230 if ((result != KERN_PROTECTION_FAILURE) || 231 ((fault_flags & VM_FAULT_WIRE_MASK) != VM_FAULT_USER_WIRE)) { |
| 232 if (growstack && result == KERN_INVALID_ADDRESS && 233 map != kernel_map && curproc != NULL) { 234 result = vm_map_growstack(curproc, vaddr); 235 if (result != KERN_SUCCESS) 236 return (KERN_FAILURE); 237 growstack = FALSE; 238 goto RetryFault; 239 } |
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| 231 return result; 232 } 233 234 /* 235 * If we are user-wiring a r/w segment, and it is COW, then 236 * we need to do the COW operation. Note that we don't COW 237 * currently RO sections now, because it is NOT desirable 238 * to COW .text. We simply keep .text from ever being COW'ed --- 999 unchanged lines hidden --- | 240 return result; 241 } 242 243 /* 244 * If we are user-wiring a r/w segment, and it is COW, then 245 * we need to do the COW operation. Note that we don't COW 246 * currently RO sections now, because it is NOT desirable 247 * to COW .text. We simply keep .text from ever being COW'ed --- 999 unchanged lines hidden --- |