On PowerPC, the cache-flush instructions dcbf and icbi are treated as

loads. On FreeBSD, add PROT_READ page protection flag before flushing
cache.

llvm-svn: 175646

diff --git a/llvm/lib/Support/Unix/Memory.inc b/llvm/lib/Support/Unix/Memory.inc
index 40d6b3f..a66e3c7 100644 (file)
--- a/llvm/lib/Support/Unix/Memory.inc
+++ b/llvm/lib/Support/Unix/Memory.inc
@@ -51,7 +51,11 @@ int getPosixProtectionFlags(unsigned Flags) {
         llvm::sys::Memory::MF_EXEC:
     return PROT_READ | PROT_WRITE | PROT_EXEC;
   case llvm::sys::Memory::MF_EXEC:
+#if defined(__FreeBSD__)
+    return PROT_READ | PROT_EXEC;
+#else
     return PROT_EXEC;
+#endif
   default:
     llvm_unreachable("Illegal memory protection flag specified!");
   }