1 /* 2 * Copyright (C) 2012 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 /* The __dso_handle global variable is used by static 30 C++ constructors and destructors in the binary. 31 See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor 32 33 CRT_LEGACY_WORKAROUND is only defined when building this file 34 for the C library. This forces __dso_handle to be exported by 35 it. This is only required to ensure binary compatibility with 36 old NDK application machine code that contains reference to 37 the symbol, but do not have a proper definition for it. 38 39 These binaries cannot call their destructorson dlclose(), but 40 at least they will not fail to load. 41 42 When this file is built for the NDK, CRT_LEGACY_WORKAROUND 43 should never be defined. 44 */ 45 46 #ifndef CRT_LEGACY_WORKAROUND 47 __attribute__ ((visibility ("hidden"))) 48 #endif 49 __attribute__ ((section (".bss"))) 50 void *__dso_handle = (void *) 0; 51