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 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LIBC_LINT_H 28 #define _LIBC_LINT_H 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* 35 * We must include "lint.h" as the first #include in all libc source files 36 * for the purpose of running lint over libc, else lint errors occur due to 37 * lint not knowing the details of the implementation of locales and stdio. 38 */ 39 #if defined(__lint) 40 41 #include "mbstatet.h" 42 #include "file64.h" 43 44 #else 45 46 /* 47 * Small optimization for callers of syscall() and __systemcall(). 48 * This could/should be defined elsewhere, but here is a particularly 49 * attractive place since all source files in libc include "lint.h". 50 */ 51 #define syscall _syscall6 52 #define __systemcall __systemcall6 53 54 /* 55 * Shades of the old and deprecated "synonyms.h" file. 56 * Because of the awkward relationship between these functions: 57 * memcmp() 58 * memcpy() 59 * memmove() 60 * memset() 61 * and the sparc auxiliary filters: 62 * /platform/.../lib/libc_psr.so.1 63 * we must be careful always to call the leading-underscore 64 * symbol names when calling from within libc itself. 65 * 66 * If an interposer interposes on these mem*() symbol names, 67 * and we call one of them from within a critical region in libc, 68 * we will end up in the interposer code while executing within 69 * the critical region. Chaos can ensue. 70 * 71 * We try to avoid this by calling only the leading-underscore names. 72 * We hope that no interposer will interpose on the leading-underscore 73 * versions of these functions, else all hope is lost. 74 */ 75 76 #pragma redefine_extname memcmp _memcmp 77 #pragma redefine_extname memcpy _memcpy 78 #pragma redefine_extname memmove _memmove 79 #pragma redefine_extname memset _memset 80 81 #endif 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _LIBC_LINT_H */ 88