10b57cec5SDimitry Andric //===-- interception_linux.h ------------------------------------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file is a part of AddressSanitizer, an address sanity checker. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric // Linux-specific interception methods. 120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \ 15e8d8bef9SDimitry Andric SANITIZER_SOLARIS 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric #if !defined(INCLUDED_FROM_INTERCEPTION_LIB) 1806c3fb27SDimitry Andric # error interception_linux.h should be included from interception library only 190b57cec5SDimitry Andric #endif 200b57cec5SDimitry Andric 210b57cec5SDimitry Andric #ifndef INTERCEPTION_LINUX_H 220b57cec5SDimitry Andric #define INTERCEPTION_LINUX_H 230b57cec5SDimitry Andric 240b57cec5SDimitry Andric namespace __interception { 250b57cec5SDimitry Andric bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func, 2606c3fb27SDimitry Andric uptr trampoline); 270b57cec5SDimitry Andric bool InterceptFunction(const char *name, const char *ver, uptr *ptr_to_real, 2806c3fb27SDimitry Andric uptr func, uptr trampoline); 290b57cec5SDimitry Andric } // namespace __interception 300b57cec5SDimitry Andric 31*52418fc2SDimitry Andric // Cast func to type of REAL(func) before casting to uptr in case it is an 32*52418fc2SDimitry Andric // overloaded function, which is the case for some glibc functions when 33*52418fc2SDimitry Andric // _FORTIFY_SOURCE is used. This disambiguates which overload to use. 340b57cec5SDimitry Andric #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) \ 350b57cec5SDimitry Andric ::__interception::InterceptFunction( \ 36*52418fc2SDimitry Andric #func, (::__interception::uptr *)&REAL(func), \ 37*52418fc2SDimitry Andric (::__interception::uptr)(decltype(REAL(func)))&(func), \ 3806c3fb27SDimitry Andric (::__interception::uptr) &TRAMPOLINE(func)) 390b57cec5SDimitry Andric 40e8d8bef9SDimitry Andric // dlvsym is a GNU extension supported by some other platforms. 41e8d8bef9SDimitry Andric #if SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD 420b57cec5SDimitry Andric #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \ 430b57cec5SDimitry Andric ::__interception::InterceptFunction( \ 440b57cec5SDimitry Andric #func, symver, \ 450b57cec5SDimitry Andric (::__interception::uptr *)&REAL(func), \ 46*52418fc2SDimitry Andric (::__interception::uptr)(decltype(REAL(func)))&(func), \ 4706c3fb27SDimitry Andric (::__interception::uptr)&TRAMPOLINE(func)) 480b57cec5SDimitry Andric #else 490b57cec5SDimitry Andric #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \ 500b57cec5SDimitry Andric INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) 51e8d8bef9SDimitry Andric #endif // SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD 520b57cec5SDimitry Andric 530b57cec5SDimitry Andric #endif // INTERCEPTION_LINUX_H 540b57cec5SDimitry Andric #endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || 55e8d8bef9SDimitry Andric // SANITIZER_SOLARIS 56