1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #if defined(_BOOT) 26 #include <sys/salib.h> 27 #else 28 #include <sys/systm.h> 29 #endif 30 31 /* 32 * Implementations of functions described in memory(3C). 33 * These functions match the section 3C manpages. 34 */ 35 /* 36 * The SunStudio compiler may generate calls to _memmove, _memset, 37 * and _memcpy; So we need to make sure that the correct symbols 38 * exist for these calls. We also use _memset to work around some 39 * standards namespacing challenges. 40 */ 41 #pragma weak _memmove = memmove 42 void * 43 memmove(void *s1, const void *s2, size_t n) 44 { 45 #if defined(_BOOT) 46 bcopy(s2, s1, n); 47 #else 48 ovbcopy(s2, s1, n); 49 #endif 50 return (s1); 51 } 52 53 #pragma weak _memset = memset 54 void * 55 memset(void *s, int c, size_t n) 56 { 57 unsigned char *t; 58 59 if ((unsigned char)c == '\0') 60 bzero(s, n); 61 else { 62 for (t = (unsigned char *)s; n > 0; n--) 63 *t++ = (unsigned char)c; 64 } 65 return (s); 66 } 67 68 int 69 memcmp(const void *s1, const void *s2, size_t n) 70 { 71 const uchar_t *ps1 = s1; 72 const uchar_t *ps2 = s2; 73 74 if (s1 != s2 && n != 0) { 75 do { 76 if (*ps1++ != *ps2++) 77 return (ps1[-1] - ps2[-1]); 78 } while (--n != 0); 79 } 80 81 return (0); 82 } 83 84 #pragma weak _memcpy = memcpy 85 void * 86 memcpy(void *s1, const void *s2, size_t n) 87 { 88 bcopy(s2, s1, n); 89 return (s1); 90 } 91 92 void * 93 memchr(const void *sptr, int c1, size_t n) 94 { 95 if (n != 0) { 96 unsigned char c = (unsigned char)c1; 97 const unsigned char *sp = sptr; 98 99 do { 100 if (*sp++ == c) 101 return ((void *)--sp); 102 } while (--n != 0); 103 } 104 return (NULL); 105 } 106