c62329f7d3
calls which are not supported on Linux and therefore cannot be handled by the rump kernel side syscall emulation (not that they'd be present in the calling binaries anyway).
60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/* $NetBSD: hijackdlsym.c,v 1.3 2012/08/25 18:00:06 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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#include <sys/cdefs.h>
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__RCSID("$NetBSD: hijackdlsym.c,v 1.3 2012/08/25 18:00:06 pooka Exp $");
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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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