1214152Sed/* ===-- clear_cache.c - Implement __clear_cache ---------------------------=== 2214152Sed * 3214152Sed * The LLVM Compiler Infrastructure 4214152Sed * 5222656Sed * This file is dual licensed under the MIT and the University of Illinois Open 6222656Sed * Source Licenses. See LICENSE.TXT for details. 7214152Sed * 8214152Sed * ===----------------------------------------------------------------------=== 9214152Sed */ 10214152Sed 11215125Sed#include "int_lib.h" 12214152Sed 13214152Sed#if __APPLE__ 14214152Sed #include <libkern/OSCacheControl.h> 15214152Sed#endif 16214152Sed 17214152Sed/* 18214152Sed * The compiler generates calls to __clear_cache() when creating 19214152Sed * trampoline functions on the stack for use with nested functions. 20214152Sed * It is expected to invalidate the instruction cache for the 21214152Sed * specified range. 22214152Sed */ 23214152Sed 24214152Sedvoid __clear_cache(void* start, void* end) 25214152Sed{ 26214152Sed#if __i386__ || __x86_64__ 27214152Sed/* 28214152Sed * Intel processors have a unified instruction and data cache 29214152Sed * so there is nothing to do 30214152Sed */ 31214152Sed#else 32214152Sed #if __APPLE__ 33214152Sed /* On Darwin, sys_icache_invalidate() provides this functionality */ 34214152Sed sys_icache_invalidate(start, end-start); 35214152Sed #else 36214152Sed compilerrt_abort(); 37214152Sed #endif 38214152Sed#endif 39214152Sed} 40214152Sed 41