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builtins: port __clear_cache to Windows ARM 

Support __clear_cache on Windows on ARM using the `FlushInstructionCache`
library call.

llvm-svn: 263832
This commit is contained in:
Saleem Abdulrasool 2016-03-18 21:06:03 +00:00
parent 49e409068a
commit fb21509509
1 changed files with 11 additions and 0 deletions
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11
compiler-rt/lib/builtins/clear_cache.c
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@ -14,6 +14,15 @@
#if __APPLE__
#include <libkern/OSCacheControl.h>
#endif
#if defined(_WIN32)
/* Forward declare Win32 APIs since the GCC mode driver does not handle the
newer SDKs as well as needed. */
uint32_t FlushInstructionCache(uintptr_t hProcess, void *lpBaseAddress,
uintptr_t dwSize);
uintptr_t GetCurrentProcess(void);
#endif
#if (defined(__FreeBSD__) || defined(__Bitrig__)) && defined(__arm__)
#include <sys/types.h>
#include <machine/sysarch.h>
@ -109,6 +118,8 @@ void __clear_cache(void *start, void *end) {
if (start_reg != 0) {
compilerrt_abort();
}
#elif defined(_WIN32)
FlushInstructionCache(GetCurrentProcess(), start, end - start);
#else
compilerrt_abort();
#endif