15b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov//===-- interception_linux.cc -----------------------------------*- C++ -*-===// 25b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// 35b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// The LLVM Compiler Infrastructure 45b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// 55b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// This file is distributed under the University of Illinois Open Source 65b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// License. See LICENSE.TXT for details. 75b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// 85b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov//===----------------------------------------------------------------------===// 95b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// 105b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// This file is a part of AddressSanitizer, an address sanity checker. 115b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// 125b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov// Linux-specific interception methods. 135b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov//===----------------------------------------------------------------------===// 145b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if defined(__linux__) || defined(__FreeBSD__) 16592d3f707e02968c75fd6e90d06d24f5df99c8b9Alexey Samsonov#include "interception.h" 175b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <dlfcn.h> // for dlsym() and dlvsym() 195b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 205b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonovnamespace __interception { 21592d3f707e02968c75fd6e90d06d24f5df99c8b9Alexey Samsonovbool GetRealFunctionAddress(const char *func_name, uptr *func_addr, 22592d3f707e02968c75fd6e90d06d24f5df99c8b9Alexey Samsonov uptr real, uptr wrapper) { 23592d3f707e02968c75fd6e90d06d24f5df99c8b9Alexey Samsonov *func_addr = (uptr)dlsym(RTLD_NEXT, func_name); 24580469d7e40e39319cb2d3750edac4bccca18105Dmitry Vyukov return real == wrapper; 255b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov} 26f061554e8bbfad5e29dcd9e81feb725b75869fa0Dmitry Vyukov 272f913eef5770968386515855529e9b6244df1247Dmitry Vyukov#if !defined(__ANDROID__) // android does not have dlvsym 28f061554e8bbfad5e29dcd9e81feb725b75869fa0Dmitry Vyukovvoid *GetFuncAddrVer(const char *func_name, const char *ver) { 29f061554e8bbfad5e29dcd9e81feb725b75869fa0Dmitry Vyukov return dlvsym(RTLD_NEXT, func_name, ver); 30f061554e8bbfad5e29dcd9e81feb725b75869fa0Dmitry Vyukov} 312f913eef5770968386515855529e9b6244df1247Dmitry Vyukov#endif // !defined(__ANDROID__) 32f061554e8bbfad5e29dcd9e81feb725b75869fa0Dmitry Vyukov 335b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov} // namespace __interception 345b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 355b29018cf422e7711fb760b733c32127397a43fcAlexey Samsonov 362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif // __linux__ || __FreeBSD__ 37