hijackdlsym.c revision 1.2.2.2
1 1.2.2.2 bouyer /* $NetBSD: hijackdlsym.c,v 1.2.2.2 2011/03/05 15:09:23 bouyer Exp $ */ 2 1.2.2.2 bouyer 3 1.2.2.2 bouyer /*- 4 1.2.2.2 bouyer * Copyright (c) 2011 Antti Kantee. All Rights Reserved. 5 1.2.2.2 bouyer * 6 1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 7 1.2.2.2 bouyer * modification, are permitted provided that the following conditions 8 1.2.2.2 bouyer * are met: 9 1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 10 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer. 11 1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 12 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 13 1.2.2.2 bouyer * documentation and/or other materials provided with the distribution. 14 1.2.2.2 bouyer * 15 1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 1.2.2.2 bouyer * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 1.2.2.2 bouyer * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 1.2.2.2 bouyer * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 1.2.2.2 bouyer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 1.2.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 1.2.2.2 bouyer * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 1.2.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 1.2.2.2 bouyer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 1.2.2.2 bouyer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 1.2.2.2 bouyer * SUCH DAMAGE. 26 1.2.2.2 bouyer */ 27 1.2.2.2 bouyer 28 1.2.2.2 bouyer #include <sys/cdefs.h> 29 1.2.2.2 bouyer __RCSID("$NetBSD: hijackdlsym.c,v 1.2.2.2 2011/03/05 15:09:23 bouyer Exp $"); 30 1.2.2.2 bouyer 31 1.2.2.2 bouyer #include <dlfcn.h> 32 1.2.2.2 bouyer 33 1.2.2.2 bouyer #include "hijack.h" 34 1.2.2.2 bouyer 35 1.2.2.2 bouyer /* 36 1.2.2.2 bouyer * This is called from librumpclient in case of LD_PRELOAD. 37 1.2.2.2 bouyer * It ensures correct RTLD_NEXT. 38 1.2.2.2 bouyer * 39 1.2.2.2 bouyer * (note, this module is compiled with -O0 to make sure this 40 1.2.2.2 bouyer * function is not treated as a tailcall or other optimizations 41 1.2.2.2 bouyer * applied) 42 1.2.2.2 bouyer */ 43 1.2.2.2 bouyer 44 1.2.2.2 bouyer /* why is this indirection required for powerpc ???? */ 45 1.2.2.2 bouyer static void * __noinline 46 1.2.2.2 bouyer bouncer(void *handle, const char *symbol) 47 1.2.2.2 bouyer { 48 1.2.2.2 bouyer 49 1.2.2.2 bouyer return dlsym(handle, symbol); 50 1.2.2.2 bouyer } 51 1.2.2.2 bouyer 52 1.2.2.2 bouyer void * 53 1.2.2.2 bouyer rumphijack_dlsym(void *handle, const char *symbol) 54 1.2.2.2 bouyer { 55 1.2.2.2 bouyer 56 1.2.2.2 bouyer return bouncer(handle, symbol); 57 1.2.2.2 bouyer } 58
Indexes created Fri Oct 03 02:09:57 GMT 2025