xref: /aosp_15_r20/external/compiler-rt/lib/interception/interception_linux.h (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6)
1*7c3d14c8STreehugger Robot //===-- interception_linux.h ------------------------------------*- C++ -*-===//
2*7c3d14c8STreehugger Robot //
3*7c3d14c8STreehugger Robot //                     The LLVM Compiler Infrastructure
4*7c3d14c8STreehugger Robot //
5*7c3d14c8STreehugger Robot // This file is distributed under the University of Illinois Open Source
6*7c3d14c8STreehugger Robot // License. See LICENSE.TXT for details.
7*7c3d14c8STreehugger Robot //
8*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===//
9*7c3d14c8STreehugger Robot //
10*7c3d14c8STreehugger Robot // This file is a part of AddressSanitizer, an address sanity checker.
11*7c3d14c8STreehugger Robot //
12*7c3d14c8STreehugger Robot // Linux-specific interception methods.
13*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===//
14*7c3d14c8STreehugger Robot 
15*7c3d14c8STreehugger Robot #if defined(__linux__) || defined(__FreeBSD__)
16*7c3d14c8STreehugger Robot 
17*7c3d14c8STreehugger Robot #if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
18*7c3d14c8STreehugger Robot # error "interception_linux.h should be included from interception library only"
19*7c3d14c8STreehugger Robot #endif
20*7c3d14c8STreehugger Robot 
21*7c3d14c8STreehugger Robot #ifndef INTERCEPTION_LINUX_H
22*7c3d14c8STreehugger Robot #define INTERCEPTION_LINUX_H
23*7c3d14c8STreehugger Robot 
24*7c3d14c8STreehugger Robot namespace __interception {
25*7c3d14c8STreehugger Robot // returns true if a function with the given name was found.
26*7c3d14c8STreehugger Robot bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
27*7c3d14c8STreehugger Robot     uptr real, uptr wrapper);
28*7c3d14c8STreehugger Robot void *GetFuncAddrVer(const char *func_name, const char *ver);
29*7c3d14c8STreehugger Robot }  // namespace __interception
30*7c3d14c8STreehugger Robot 
31*7c3d14c8STreehugger Robot #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)                          \
32*7c3d14c8STreehugger Robot   ::__interception::GetRealFunctionAddress(                                \
33*7c3d14c8STreehugger Robot       #func, (::__interception::uptr *)&__interception::PTR_TO_REAL(func), \
34*7c3d14c8STreehugger Robot       (::__interception::uptr) & (func),                                   \
35*7c3d14c8STreehugger Robot       (::__interception::uptr) & WRAP(func))
36*7c3d14c8STreehugger Robot 
37*7c3d14c8STreehugger Robot #if !defined(__ANDROID__)  // android does not have dlvsym
38*7c3d14c8STreehugger Robot #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
39*7c3d14c8STreehugger Robot   (::__interception::real_##func = (func##_f)(                \
40*7c3d14c8STreehugger Robot        unsigned long)::__interception::GetFuncAddrVer(#func, symver))
41*7c3d14c8STreehugger Robot #else
42*7c3d14c8STreehugger Robot #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
43*7c3d14c8STreehugger Robot   INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
44*7c3d14c8STreehugger Robot #endif  // !defined(__ANDROID__)
45*7c3d14c8STreehugger Robot 
46*7c3d14c8STreehugger Robot #endif  // INTERCEPTION_LINUX_H
47*7c3d14c8STreehugger Robot #endif  // __linux__ || __FreeBSD__
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