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STAC (protein)
STAC may refer to: Computers and electronics * stac (Set AC Flag) instruction on x86 CPUs, part of Supervisor Mode Access Prevention * Stac Electronics, a former American technology company ** Lempel–Ziv–Stac, a data compression algorithm developed by Stac Electronics * SigmaTel Audio Codec * an extended version of the Graphic Adventure Creator software * SpatioTemporal Asset Catalog, an Open standard, open specification to describe Geographic data and information, geospatial information. Education * Southern Theatre Arts Centre, a training venue in Durrington by Sea, Worthing, West Sussex, England * St. Thomas Aquinas College, Sparkill, New York * Saint Thomas Aquinas College (Sogod), Southern Leyte, Philippines * St Andrew's College, Christchurch, New Zealand Transportation * Service des transports de l'agglomération chambérienne (Stac), a transport service in Chambéry, France; part of Compagnie générale française des transports et entreprises * Service de transport a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supervisor Mode Access Prevention
Supervisor Mode Access Prevention (SMAP) is a feature of some CPU implementations such as the Intel Broadwell microarchitecture that allows supervisor mode programs to optionally set user-space memory mappings so that access to those mappings from supervisor mode will cause a trap. This makes it harder for malicious programs to "trick" the kernel into using instructions or data from a user-space program. History Supervisor Mode Access Prevention is designed to complement Supervisor Mode Execution Prevention (SMEP), which was introduced earlier. SMEP can be used to prevent supervisor mode from unintentionally executing user-space code. SMAP extends this protection to reads and writes. Benefits Without Supervisor Mode Access Prevention, supervisor code usually has full read and write access to user-space memory mappings (or has the ability to obtain full access). This has led to the development of several security exploits, including privilege escalation exploits, which ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |