1 /* 2 * Copyright 2012, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _PORTABILITY_H_ 18 #define _PORTABILITY_H_ 19 20 #include <stdint.h> 21 #include "asm-generic/portability.h" 22 /* 23 * Common portability helper routines 24 */ 25 26 /* 27 * Check a portable pointer before we access it 28 * Well behaved programs should not be passing bad pointers 29 * to the kernel but this routine can be used to check a pointer 30 * if we need to use it before calling the kernel 31 * 32 * It does not catch every possible case but it is sufficient for LTP 33 */ 34 inline static int invalid_pointer(void *p) 35 { 36 return p == 0 37 || p == (void *)-1 38 #ifdef __mips__ 39 || (intptr_t)p < 0 40 #endif 41 ; 42 } 43 44 /* 45 * Hidden functions are exposed while linking the libportable shared object 46 * but are not exposed thereafter. 47 */ 48 #define __hidden __attribute__((visibility("hidden"))) 49 50 #endif /* _PORTABILITY_H_ */ 51
