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 __FBSDID("$FreeBSD$"); 29 30 #include <stand.h> 31 32 #include "libuserboot.h" 33 34 ssize_t 35 userboot_copyin(const void *src, vm_offset_t va, size_t len) 36 { 37 38 CALLBACK(copyin, src, va, len); 39 return (len); 40 } 41 42 ssize_t 43 userboot_copyout(vm_offset_t va, void *dst, size_t len) 44 { 45 46 CALLBACK(copyout, va, dst, len); 47 return (len); 48 } 49 50 ssize_t 51 userboot_readin(readin_handle_t fd, vm_offset_t va, size_t len) 52 { 53 ssize_t res, s; 54 size_t sz; 55 char buf[4096]; 56 57 res = 0; 58 while (len > 0) { 59 sz = len; 60 if (sz > sizeof(buf)) 61 sz = sizeof(buf); 62 s = VECTX_READ(fd, buf, sz); 63 if (s == 0) 64 break; 65 if (s < 0) 66 return (s); 67 CALLBACK(copyin, buf, va, s); 68 len -= s; 69 res += s; 70 va += s; 71 } 72 return (res); 73 } 74