1 /* 2 * Copyright (C) 2008 The Android Open Source Project 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 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <errno.h> 30 31 // This function is called from our assembler syscall stubs. 32 // C/C++ code should just assign 'errno' instead. 33 34 // The return type is 'long' because we use the same routine in calls 35 // that return an int as in ones that return a ssize_t. On a 32-bit 36 // system these are the same size, but on a 64-bit system they're not. 37 // 'long' gives us 32-bit on 32-bit systems, 64-bit on 64-bit systems. 38 39 // Since __set_errno was mistakenly exposed in <errno.h> in the 32-bit 40 // NDK, use a differently named internal function for the system call 41 // stubs. This avoids having the stubs .hidden directives accidentally 42 // hide __set_errno for old NDK apps. 43 44 // This one is for internal use only and used by both LP32 and LP64 assembler. 45 extern "C" __LIBC_HIDDEN__ long __set_errno_internal(int n) { 46 errno = n; 47 return -1; 48 } 49
