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* [gcc r12-3204] Darwin, X86 : Implement __cache_clear.
@ 2021-08-29  6:51 Iain D Sandoe
  0 siblings, 0 replies; only message in thread
From: Iain D Sandoe @ 2021-08-29  6:51 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:fc3e9f58ec18154027aadc6aa055490acb8c2920

commit r12-3204-gfc3e9f58ec18154027aadc6aa055490acb8c2920
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Fri Sep 4 14:05:12 2020 +0100

    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:
---
 gcc/config/i386/darwin.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gcc/config/i386/darwin.h b/gcc/config/i386/darwin.h
index 73b06e2307d..da0ae5b3ee7 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)))


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