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$NetBSD: patch-js_src_vm_ArrayBufferObject.cpp,v 1.2 2021/06/30 15:09:56 ryoon Exp $
PaX MPROTECT safety for NetBSD.
--- js/src/vm/ArrayBufferObject.cpp.orig 2021-05-20 21:29:34.000000000 +0000
+++ js/src/vm/ArrayBufferObject.cpp
@@ -189,9 +189,17 @@ void* js::MapBufferMemory(size_t mappedS
MOZ_ASSERT(data);
memset(data, 0, mappedSize);
#else // !XP_WIN && !__wasi__
+
+#ifdef PROT_MPROTECT
+ void* data =
+ MozTaggedAnonymousMmap(nullptr, mappedSize,
+ PROT_MPROTECT(PROT_EXEC | PROT_WRITE | PROT_READ),
+ MAP_PRIVATE | MAP_ANON, -1, 0, "wasm-reserved");
+#else
void* data =
MozTaggedAnonymousMmap(nullptr, mappedSize, PROT_NONE,
MAP_PRIVATE | MAP_ANON, -1, 0, "wasm-reserved");
+#endif
if (data == MAP_FAILED) {
return nullptr;
}
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