[PATCH] D47753: [Support] Use zx_cache_flush on Fuchsia to flush instruction cache

[Petr Hosek via Phabricator via llvm-commits]

phosek created this revision.
phosek added a reviewer: mcgrathr.
Herald added subscribers: llvm-commits, hiraditya.

Fuchsia doesn't use __clear_cache, instead it provide zx_cache_flush
system call. Use it to flush instruction cache.


Repository:
  rL LLVM

https://reviews.llvm.org/D47753

Files:
  llvm/lib/Support/Unix/Memory.inc


Index: llvm/lib/Support/Unix/Memory.inc
===================================================================
--- llvm/lib/Support/Unix/Memory.inc
+++ llvm/lib/Support/Unix/Memory.inc
@@ -25,17 +25,21 @@
 #include <mach/mach.h>
 #endif
 
+#ifdef __Fuchsia__
+#include <zircon/syscalls.h>
+#endif
+
 #if defined(__mips__)
 #  if defined(__OpenBSD__)
 #    include <mips64/sysarch.h>
 #  elif !defined(__FreeBSD__)
 #    include <sys/cachectl.h>
 #  endif
 #endif
 
-#ifdef __APPLE__
+#if defined(__APPLE__)
 extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
-#else
+#elif !defined(__Fuchsia__)
 extern "C" void __clear_cache(void *, void*);
 #endif
 
@@ -206,6 +210,11 @@
   sys_icache_invalidate(const_cast<void *>(Addr), Len);
 #  endif
 
+#elif defined(__Fuchsia__)
+
+  zx_status_t Status = zx_cache_flush(Addr, Len, ZX_CACHE_FLUSH_INSN);
+  assert(Status == ZX_OK && "cannot invalidate instruction cache");
+
 #else
 
 #  if (defined(__POWERPC__) || defined (__ppc__) || \


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