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

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175646 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/Unix/Memory.inc b/lib/Support/Unix/Memory.inc
index 40d6b3fefd9d37aade41a87a1b5588230d6227b0..a66e3c7aeee634623be343c20cb73f8662dd924a 100644 (file)
--- a/lib/Support/Unix/Memory.inc
+++ b/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!");
   }