1*bb722a7dSDimitry Andric //===-- Including stdio.h in overlay mode ---------------------------------===// 2*bb722a7dSDimitry Andric // 3*bb722a7dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bb722a7dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bb722a7dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bb722a7dSDimitry Andric // 7*bb722a7dSDimitry Andric //===----------------------------------------------------------------------===// 8*bb722a7dSDimitry Andric 9*bb722a7dSDimitry Andric #ifndef LLVM_LIBC_HDR_STDIO_OVERLAY_H 10*bb722a7dSDimitry Andric #define LLVM_LIBC_HDR_STDIO_OVERLAY_H 11*bb722a7dSDimitry Andric 12*bb722a7dSDimitry Andric #ifdef LIBC_FULL_BUILD 13*bb722a7dSDimitry Andric #error "This header should only be included in overlay mode" 14*bb722a7dSDimitry Andric #endif 15*bb722a7dSDimitry Andric 16*bb722a7dSDimitry Andric // Overlay mode 17*bb722a7dSDimitry Andric 18*bb722a7dSDimitry Andric // glibc <stdio.h> header might provide extern inline definitions for few 19*bb722a7dSDimitry Andric // functions, causing external alias errors. They are guarded by 20*bb722a7dSDimitry Andric // `__USE_EXTERN_INLINES` macro. We temporarily disable `__USE_EXTERN_INLINES` 21*bb722a7dSDimitry Andric // macro by defining `__NO_INLINE__` before including <stdio.h>. 22*bb722a7dSDimitry Andric // And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled 23*bb722a7dSDimitry Andric // with `_FORTIFY_SOURCE`. 24*bb722a7dSDimitry Andric 25*bb722a7dSDimitry Andric #ifdef _FORTIFY_SOURCE 26*bb722a7dSDimitry Andric #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE 27*bb722a7dSDimitry Andric #undef _FORTIFY_SOURCE 28*bb722a7dSDimitry Andric #endif 29*bb722a7dSDimitry Andric 30*bb722a7dSDimitry Andric #ifdef __USE_EXTERN_INLINES 31*bb722a7dSDimitry Andric #define LIBC_OLD_USE_EXTERN_INLINES 32*bb722a7dSDimitry Andric #undef __USE_EXTERN_INLINES 33*bb722a7dSDimitry Andric #endif 34*bb722a7dSDimitry Andric 35*bb722a7dSDimitry Andric #ifdef __USE_FORTIFY_LEVEL 36*bb722a7dSDimitry Andric #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL 37*bb722a7dSDimitry Andric #undef __USE_FORTIFY_LEVEL 38*bb722a7dSDimitry Andric #define __USE_FORTIFY_LEVEL 0 39*bb722a7dSDimitry Andric #endif 40*bb722a7dSDimitry Andric 41*bb722a7dSDimitry Andric #ifndef __NO_INLINE__ 42*bb722a7dSDimitry Andric #define __NO_INLINE__ 1 43*bb722a7dSDimitry Andric #define LIBC_SET_NO_INLINE 44*bb722a7dSDimitry Andric #endif 45*bb722a7dSDimitry Andric 46*bb722a7dSDimitry Andric #include <stdio.h> 47*bb722a7dSDimitry Andric 48*bb722a7dSDimitry Andric #ifdef LIBC_OLD_FORTIFY_SOURCE 49*bb722a7dSDimitry Andric #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE 50*bb722a7dSDimitry Andric #undef LIBC_OLD_FORTIFY_SOURCE 51*bb722a7dSDimitry Andric #endif 52*bb722a7dSDimitry Andric 53*bb722a7dSDimitry Andric #ifdef LIBC_SET_NO_INLINE 54*bb722a7dSDimitry Andric #undef __NO_INLINE__ 55*bb722a7dSDimitry Andric #undef LIBC_SET_NO_INLINE 56*bb722a7dSDimitry Andric #endif 57*bb722a7dSDimitry Andric 58*bb722a7dSDimitry Andric #ifdef LIBC_OLD_USE_FORTIFY_LEVEL 59*bb722a7dSDimitry Andric #undef __USE_FORTIFY_LEVEL 60*bb722a7dSDimitry Andric #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL 61*bb722a7dSDimitry Andric #undef LIBC_OLD_USE_FORTIFY_LEVEL 62*bb722a7dSDimitry Andric #endif 63*bb722a7dSDimitry Andric 64*bb722a7dSDimitry Andric #ifdef LIBC_OLD_USE_EXTERN_INLINES 65*bb722a7dSDimitry Andric #define __USE_EXTERN_INLINES 66*bb722a7dSDimitry Andric #undef LIBC_OLD_USE_EXTERN_INLINES 67*bb722a7dSDimitry Andric #endif 68*bb722a7dSDimitry Andric 69*bb722a7dSDimitry Andric #endif // LLVM_LIBC_HDR_STDIO_OVERLAY_H 70