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