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//===-- clear_cache.c - Implement __clear_cache ---------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include <stdlib.h>

#if __APPLE__
  #include <libkern/OSCacheControl.h>
#endif

//
// The compiler generates calls to __clear_cache() when creating 
// trampoline functions on the stack for use with nested functions.
// It is expected to invalidate the instruction cache for the 
// specified range.
//
void __clear_cache(void* start, void* end)
{
#if __i386__ || __x86_64__
//
// Intel processors have a unified instruction and data cache
// so there is nothing to do
//
#else
    #if __APPLE__
        // On Darwin, sys_icache_invalidate() provides this functionality
        sys_icache_invalidate(start, end-start);
    #else
        abort();
    #endif
#endif
}