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Darwin/aarch64: Use Clang cache invalidation builtin

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Zachary Waldowski
2014-01-09 13:55:21 -05:00
parent 6030cdcae7
commit 1b8a8e20e3
1 changed files with 18 additions and 1 deletions
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19
src/aarch64/ffi.c
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@@ -49,6 +49,23 @@ struct call_context
} v [AARCH64_N_VREG];
};
#if defined (__clang__) && defined (__APPLE__)
extern void
sys_icache_invalidate (void *start, size_t len);
#endif
static inline void
ffi_clear_cache (void *start, void *end)
{
#if defined (__clang__) && defined (__APPLE__)
sys_icache_invalidate (start, (char *)end - (char *)start);
#elif defined (__GNUC__)
__builtin___clear_cache (start, end);
#else
#error "Missing builtin to flush instruction cache"
#endif
}
static void *
get_x_addr (struct call_context *context, unsigned n)
{
@@ -840,7 +857,7 @@ static unsigned char trampoline [] =
memcpy (__tramp + 12, &__fun, sizeof (__fun)); \
memcpy (__tramp + 20, &__ctx, sizeof (__ctx)); \
memcpy (__tramp + 28, &__flags, sizeof (__flags)); \
__clear_cache(__tramp, __tramp + FFI_TRAMPOLINE_SIZE); \
ffi_clear_cache(__tramp, __tramp + FFI_TRAMPOLINE_SIZE); \
})
ffi_status