From: Iain Sandoe <iain@sandoe.co.uk>
Date: Fri, 4 Sep 2020 13:05:12 +0000 (+0100)
Subject: Darwin, X86 : Implement __cache_clear.
X-Git-Tag: upstream/12.2.0~5493
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fc3e9f58ec18154027aadc6aa055490acb8c2920;p=platform%2Fupstream%2Fgcc.git

Darwin, X86 : Implement __cache_clear.

We had a NOP cache clear, but there is a suitable mechanism provided
by a system call.  This connects it up.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

gcc/ChangeLog:

	* config/i386/darwin.h (CLEAR_INSN_CACHE): New.
---

diff --git a/gcc/config/i386/darwin.h b/gcc/config/i386/darwin.h
index 73b06e2..da0ae5b 100644
--- a/gcc/config/i386/darwin.h
+++ b/gcc/config/i386/darwin.h
@@ -344,3 +344,8 @@ along with GCC; see the file COPYING3.  If not see
 #undef SUBTARGET_SHADOW_OFFSET
 #define SUBTARGET_SHADOW_OFFSET	\
   (TARGET_LP64 ? HOST_WIDE_INT_1 << 44 : HOST_WIDE_INT_1 << 29)
+
+#undef CLEAR_INSN_CACHE
+#define CLEAR_INSN_CACHE(beg, end)				\
+  extern void sys_icache_invalidate(void *start, size_t len);	\
+  sys_icache_invalidate ((beg), (size_t)((end)-(beg)))