Definitions for PAX
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pax, kiss of peace(noun)
(Roman Catholic Church) a greeting signifying Christian love for those assisting at the Eucharist
A painted, stamped or carved tablet with a representation of Christ or the Virgin Mary, which was kissed by the priest during the Mass ("kiss of peace") and then passed to other officiating clergy and the congregation to be kissed. See also osculatory.
A cry for peace or truce in children's games.
Origin: pax peace. See peace.
the kiss of peace; also, the embrace in the sanctuary now substituted for it at High Mass in Roman Catholic churches
a tablet or board, on which is a representation of Christ, of the Virgin Mary, or of some saint and which, in the Mass, was kissed by the priest and then by the people, in mediaeval times; an osculatory. It is still used in communities, confraternities, etc
Origin: [L. pax peace. See Peace.]
PaX is a patch for the Linux kernel that implements least privilege protections for memory pages. The least-privilege approach allows computer programs to do only what they have to do in order to be able to execute properly, and nothing more. PaX was first released in 2000. PaX flags data memory as non-executable, program memory as non-writable and randomly arranges the program memory. This effectively prevents many security exploits, such as some kinds of buffer overflows. The former prevents direct code execution absolutely, while the latter makes so-called return-to-libc attacks difficult to exploit, relying on luck to succeed, but doesn't prevent variables and pointers overwriting. PaX is maintained by The PaX Team, whose principal coder is anonymous.
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