1/* ===-- clear_cache.c - Implement __clear_cache ---------------------------===
2 *
3 *                     The LLVM Compiler Infrastructure
4 *
5 * This file is distributed under the University of Illinois Open Source
6 * License. See LICENSE.TXT for details.
7 *
8 * ===----------------------------------------------------------------------===
9 */
10
11#include <stdlib.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
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        abort();
37    #endif
38#endif
39}
40
41