1 /*- 2 * Copyright (c) 2011 Google, Inc. 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 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 #include <stand.h> 29 30 #include "libuserboot.h" 31 32 ssize_t 33 userboot_copyin(const void *src, vm_offset_t va, size_t len) 34 { 35 36 CALLBACK(copyin, src, va, len); 37 return (len); 38 } 39 40 ssize_t 41 userboot_copyout(vm_offset_t va, void *dst, size_t len) 42 { 43 44 CALLBACK(copyout, va, dst, len); 45 return (len); 46 } 47 48 ssize_t 49 userboot_readin(readin_handle_t fd, vm_offset_t va, size_t len) 50 { 51 ssize_t res, s; 52 size_t sz; 53 char buf[4096]; 54 55 res = 0; 56 while (len > 0) { 57 sz = len; 58 if (sz > sizeof(buf)) 59 sz = sizeof(buf); 60 s = VECTX_READ(fd, buf, sz); 61 if (s == 0) 62 break; 63 if (s < 0) 64 return (s); 65 CALLBACK(copyin, buf, va, s); 66 len -= s; 67 res += s; 68 va += s; 69 } 70 return (res); 71 } 72