Editing NX bit (section)

===SPARC===
The SPARC Reference MMU for [[Sun Microsystems|Sun]] [[SPARC]] version 8 has permission values of Read Only, Read/Write, Read/Execute, and Read/Write/Execute in page table entries,<ref>{{cite web|url=http://sparc.org/wp-content/uploads/2014/01/v8.pdf.gz|title=The SPARC Architectural Manual, Version 8|page=244|publisher=[[SPARC International]]}}</ref> although not all SPARC processors have a SPARC Reference MMU.

A SPARC version 9 MMU may provide, but is not required to provide, any combination of read/write/execute permissions.<ref>{{cite book|url=http://www.sparc.org/standards/SPARCV9.pdf|title=The SPARC Architecture Manual, Version 9|at=F.3.2 Attributes the MMU Associates with Each Mapping, p. 284|publisher=SPARC International|year=1994|isbn=0-13-825001-4|archive-url=https://web.archive.org/web/20120118213535/http://www.sparc.org/standards/SPARCV9.pdf|archive-date=2012-01-18|url-status=dead}}</ref>  A Translation Table Entry in a Translation Storage Buffer in Oracle SPARC Architecture 2011, Draft D1.0.0 has separate Executable and Writable bits.<ref>{{cite web|url=http://www.oracle.com/technetwork/server-storage/sun-sparc-enterprise/documentation/140521-ua2011-d096-p-ext-2306580.pdf|title=Oracle SPARC Architecture 2011, Draft D1.0.0|page=452|publisher=[[Oracle Corporation]]|date=January 12, 2016}}</ref>