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  • Committer: Bazaar Package Importer
  • Author(s): Kees Cook
  • Date: 2007-02-20 10:33:44 UTC
  • mto: This revision was merged to the branch mainline in revision 16.
  • Revision ID: james.westby@ubuntu.com-20070220103344-zgcu2psnx9d98fpa
Tags: upstream-0.90
Import upstream version 0.90

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libclamav/c++/llvm/lib/System/SearchForAddressOfSpecialSymbol.cpp
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//===- SearchForAddressOfSpecialSymbol.cpp - Function addresses -*- C++ -*-===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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//  This file pulls the addresses of certain symbols out of the linker.  It must
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//  include as few header files as possible because it declares the symbols as
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//  void*, which would conflict with the actual symbol type if any header
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//  declared it.
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//
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//===----------------------------------------------------------------------===//
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#include <string.h>
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// Must declare the symbols in the global namespace.
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static void *DoSearch(const char* symbolName) {
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#define EXPLICIT_SYMBOL(SYM) \
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   extern void *SYM; if (!strcmp(symbolName, #SYM)) return &SYM
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  // If this is darwin, it has some funky issues, try to solve them here.  Some
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  // important symbols are marked 'private external' which doesn't allow
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  // SearchForAddressOfSymbol to find them.  As such, we special case them here,
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  // there is only a small handful of them.
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#ifdef __APPLE__
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  {
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    EXPLICIT_SYMBOL(__ashldi3);
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    EXPLICIT_SYMBOL(__ashrdi3);
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    EXPLICIT_SYMBOL(__cmpdi2);
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    EXPLICIT_SYMBOL(__divdi3);
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    EXPLICIT_SYMBOL(__eprintf);
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    EXPLICIT_SYMBOL(__fixdfdi);
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    EXPLICIT_SYMBOL(__fixsfdi);
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    EXPLICIT_SYMBOL(__fixunsdfdi);
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    EXPLICIT_SYMBOL(__fixunssfdi);
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    EXPLICIT_SYMBOL(__floatdidf);
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    EXPLICIT_SYMBOL(__floatdisf);
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    EXPLICIT_SYMBOL(__lshrdi3);
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    EXPLICIT_SYMBOL(__moddi3);
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    EXPLICIT_SYMBOL(__udivdi3);
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    EXPLICIT_SYMBOL(__umoddi3);
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  }
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#endif
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#ifdef __CYGWIN__
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  {
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    EXPLICIT_SYMBOL(_alloca);
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    EXPLICIT_SYMBOL(__main);
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  }
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#endif
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#undef EXPLICIT_SYMBOL
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  return 0;
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}
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namespace llvm {
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void *SearchForAddressOfSpecialSymbol(const char* symbolName) {
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  return DoSearch(symbolName);
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}
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}  // namespace llvm