diff options
Diffstat (limited to 'rts')
| -rw-r--r-- | rts/sm/Storage.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/rts/sm/Storage.c b/rts/sm/Storage.c index 4aa4b12868..e2435173c1 100644 --- a/rts/sm/Storage.c +++ b/rts/sm/Storage.c @@ -1341,6 +1341,14 @@ StgWord calcTotalCompactW (void) #include <libkern/OSCacheControl.h> #endif +#if defined(__GNUC__) +/* __clear_cache is a libgcc function. + * It existed before __builtin___clear_cache was introduced. + * See Trac #8562. + */ +extern void __clear_cache(char * begin, char * end); +#endif /* __GNUC__ */ + /* On ARM and other platforms, we need to flush the cache after writing code into memory, so the processor reliably sees it. */ void flushExec (W_ len, AdjustorExecutable exec_addr) @@ -1356,7 +1364,15 @@ void flushExec (W_ len, AdjustorExecutable exec_addr) /* For all other platforms, fall back to a libgcc builtin. */ unsigned char* begin = (unsigned char*)exec_addr; unsigned char* end = begin + len; + + /* __builtin___clear_cache is supported since GNU C 4.3.6. + * We pick 4.4 to simplify condition a bit. + */ +# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4) + __builtin___clear_cache((void*)begin, (void*)end); +# else __clear_cache((void*)begin, (void*)end); +# endif #else #error Missing support to flush the instruction cache #endif |