1 /* ===-- clear_cache.c - Implement __clear_cache ---------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 */ 10 11 #include "int_lib.h" 12 13 #if __APPLE__ 14 #include <libkern/OSCacheControl.h> 15 #endif 16 17 /* 18 * The compiler generates calls to __clear_cache() when creating 19 * trampoline functions on the stack for use with nested functions. 20 * It is expected to invalidate the instruction cache for the 21 * specified range. 22 */ 23 __clear_cache(void * start,void * end)24void __clear_cache(void* start, void* end) 25 { 26 #if __i386__ || __x86_64__ 27 /* 28 * Intel processors have a unified instruction and data cache 29 * so there is nothing to do 30 */ 31 #else 32 #if __APPLE__ 33 /* On Darwin, sys_icache_invalidate() provides this functionality */ 34 sys_icache_invalidate(start, end-start); 35 #else 36 compilerrt_abort(); 37 #endif 38 #endif 39 } 40 41