1/*- 2 * Copyright (c) 1994, Sean Eric Fagan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> |
33__FBSDID("$FreeBSD: head/sys/kern/sys_process.c 253953 2013-08-05 08:55:35Z attilio $"); |
34 35#include "opt_compat.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/lock.h> 40#include <sys/mutex.h> 41#include <sys/syscallsubr.h> --- 216 unchanged lines hidden (view full) --- 258 /* 259 * If we are writing, then we request vm_fault() to create a private 260 * copy of each page. Since these copies will not be writeable by the 261 * process, we must explicity request that they be dirtied. 262 */ 263 writing = uio->uio_rw == UIO_WRITE; 264 reqprot = writing ? VM_PROT_COPY | VM_PROT_READ : VM_PROT_READ; 265 fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL; |
266 267 /* 268 * Only map in one page at a time. We don't have to, but it 269 * makes things easier. This way is trivial - right? 270 */ 271 do { 272 vm_offset_t uva; 273 u_int len; --- 8 unchanged lines hidden (view full) --- 282 page_offset = uva - pageno; 283 284 /* 285 * How many bytes to copy 286 */ 287 len = min(PAGE_SIZE - page_offset, uio->uio_resid); 288 289 /* |
290 * Fault and hold the page on behalf of the process. |
291 */ |
292 error = vm_fault_hold(map, pageno, reqprot, fault_flags, &m); |
293 if (error != KERN_SUCCESS) { 294 if (error == KERN_RESOURCE_SHORTAGE) 295 error = ENOMEM; 296 else 297 error = EFAULT; 298 break; 299 } 300 --- 9 unchanged lines hidden (view full) --- 310 PAGE_SIZE, VM_PROT_EXECUTE)) 311 vm_sync_icache(map, uva, len); 312 vm_map_unlock_read(map); 313 } 314 315 /* 316 * Release the page. 317 */ |
318 vm_page_lock(m); 319 vm_page_unhold(m); 320 vm_page_unlock(m); |
321 322 } while (error == 0 && uio->uio_resid > 0); 323 324 return (error); 325} 326 327static int 328ptrace_vm_entry(struct thread *td, struct proc *p, struct ptrace_vm_entry *pve) --- 914 unchanged lines hidden --- |