61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/* $NetBSD: hijackdlsym.c,v 1.4 2013/07/18 22:58:35 pooka Exp $ */
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/*-
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* Copyright (c) 2011 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "rumpuser_port.h"
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#if !defined(lint)
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__RCSID("$NetBSD: hijackdlsym.c,v 1.4 2013/07/18 22:58:35 pooka Exp $");
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#endif
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#include <dlfcn.h>
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#include "hijack.h"
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/*
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* This is called from librumpclient in case of LD_PRELOAD.
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* It ensures correct RTLD_NEXT.
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*
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* (note, this module is compiled with -O0 to make sure this
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* function is not treated as a tailcall or other optimizations
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* applied)
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*/
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/* why is this indirection required for powerpc ???? */
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static void * __noinline
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bouncer(void *handle, const char *symbol)
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{
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return dlsym(handle, symbol);
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}
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void *
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rumphijack_dlsym(void *handle, const char *symbol)
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{
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return bouncer(handle, symbol);
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}
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