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locks; strict;
comment	@// @;


1.1
date	2020.11.11.11.15.38;	author nia;	state Exp;
branches;
next	;
commitid	RbtQcFmYcDloBsvC;


desc
@@


1.1
log
@firefox52: Make PaX MPROTECT safe on NetBSD. Bump PKGREVISION.

This little bit of extra security is pretty critical when using this
older Firefox release.
@
text
@$NetBSD$

PaX MPROTECT safety for NetBSD.

--- js/src/vm/ArrayBufferObject.cpp.orig	2017-04-11 02:13:21.000000000 +0000
+++ js/src/vm/ArrayBufferObject.cpp
@@@@ -648,8 +648,14 @@@@ WasmArrayRawBuffer::Allocate(uint32_t nu
         return nullptr;
     }
 # else  // XP_WIN
+#ifdef PROT_MPROTECT
+    void* data = MozTaggedAnonymousMmap(nullptr, (size_t) mappedSizeWithHeader,
+                                        PROT_NONE | PROT_MPROTECT(PROT_EXEC | PROT_WRITE | PROT_READ),
+                                        MAP_PRIVATE | MAP_ANON, -1, 0, "wasm-reserved");
+#else
     void* data = MozTaggedAnonymousMmap(nullptr, (size_t) mappedSizeWithHeader, PROT_NONE,
                                         MAP_PRIVATE | MAP_ANON, -1, 0, "wasm-reserved");
+#endif
     if (data == MAP_FAILED)
         return nullptr;
 
@