//===-- interception_linux.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Linux-specific interception methods.
//===----------------------------------------------------------------------===//

#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
    SANITIZER_SOLARIS

#if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
# error interception_linux.h should be included from interception library only
#endif

#ifndef INTERCEPTION_LINUX_H
#define INTERCEPTION_LINUX_H

namespace __interception {
bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func,
                       uptr trampoline);
bool InterceptFunction(const char *name, const char *ver, uptr *ptr_to_real,
                       uptr func, uptr trampoline);
}  // namespace __interception

#define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) \
  ::__interception::InterceptFunction(            \
      #func,                                      \
      (::__interception::uptr *)&REAL(func),      \
      (::__interception::uptr)&(func),            \
      (::__interception::uptr)&TRAMPOLINE(func))

// dlvsym is a GNU extension supported by some other platforms.
#if SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD
#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
  ::__interception::InterceptFunction(                        \
      #func, symver,                                          \
      (::__interception::uptr *)&REAL(func),                  \
      (::__interception::uptr)&(func),                        \
      (::__interception::uptr)&TRAMPOLINE(func))
#else
#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
  INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
#endif  // SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD

#endif  // INTERCEPTION_LINUX_H
#endif  // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
        // SANITIZER_SOLARIS