1 //===-- interception_linux.h ------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of AddressSanitizer, an address sanity checker. 10 // 11 // Linux-specific interception methods. 12 //===----------------------------------------------------------------------===// 13 14 #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \ 15 SANITIZER_SOLARIS 16 17 #if !defined(INCLUDED_FROM_INTERCEPTION_LIB) 18 # error interception_linux.h should be included from interception library only 19 #endif 20 21 #ifndef INTERCEPTION_LINUX_H 22 #define INTERCEPTION_LINUX_H 23 24 namespace __interception { 25 bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func, 26 uptr trampoline); 27 bool InterceptFunction(const char *name, const char *ver, uptr *ptr_to_real, 28 uptr func, uptr trampoline); 29 } // namespace __interception 30 31 // Cast func to type of REAL(func) before casting to uptr in case it is an 32 // overloaded function, which is the case for some glibc functions when 33 // _FORTIFY_SOURCE is used. This disambiguates which overload to use. 34 #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) \ 35 ::__interception::InterceptFunction( \ 36 #func, (::__interception::uptr *)&REAL(func), \ 37 (::__interception::uptr)(decltype(REAL(func)))&(func), \ 38 (::__interception::uptr) &TRAMPOLINE(func)) 39 40 // dlvsym is a GNU extension supported by some other platforms. 41 #if SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD 42 #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \ 43 ::__interception::InterceptFunction( \ 44 #func, symver, \ 45 (::__interception::uptr *)&REAL(func), \ 46 (::__interception::uptr)(decltype(REAL(func)))&(func), \ 47 (::__interception::uptr)&TRAMPOLINE(func)) 48 #else 49 #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \ 50 INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) 51 #endif // SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD 52 53 #endif // INTERCEPTION_LINUX_H 54 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || 55 // SANITIZER_SOLARIS 56