1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/boot/i386/libi386/i386_copy.c,v 1.10 2003/08/25 23:28:31 obrien Exp $ 27 * $DragonFly: src/sys/boot/pc32/libi386/i386_copy.c,v 1.3 2003/11/10 06:08:36 dillon Exp $ 28 */ 29 30 /* 31 * MD primitives supporting placement of module data 32 * 33 * XXX should check load address/size against memory top. 34 */ 35 #include <stand.h> 36 37 #include "libi386.h" 38 #include "btxv86.h" 39 40 #define READIN_BUF (16 * 1024) 41 42 ssize_t 43 i386_copyin(const void *src, vm_offset_t dest, const size_t len) 44 { 45 if (dest + len >= memtop) { 46 errno = EFBIG; 47 return(-1); 48 } 49 50 bcopy(src, PTOV(dest), len); 51 return(len); 52 } 53 54 ssize_t 55 i386_copyout(const vm_offset_t src, void *dest, const size_t len) 56 { 57 if (src + len >= memtop) { 58 errno = EFBIG; 59 return(-1); 60 } 61 62 bcopy(PTOV(src), dest, len); 63 return(len); 64 } 65 66 67 ssize_t 68 i386_readin(const int fd, vm_offset_t dest, const size_t len) 69 { 70 void *buf; 71 size_t resid, chunk, get; 72 ssize_t got; 73 74 if (dest + len >= memtop) 75 return(0); 76 77 chunk = min(READIN_BUF, len); 78 buf = malloc(chunk); 79 if (buf == NULL) 80 return(0); 81 82 for (resid = len; resid > 0; resid -= got, dest += got) { 83 get = szmin(chunk, resid); 84 got = read(fd, buf, get); 85 if (got <= 0) 86 break; 87 bcopy(buf, PTOV(dest), (size_t)got); 88 } 89 free(buf); 90 return(len - resid); 91 } 92