Linux Assemblycollection of fast libraries

Memory Protection Extensions (MPX) instructions set

Memory Protection Extensions (MPX) is a new capability introduced into Intel Architecture. MPX can increase the robustness of software when it is used in conjunction with compiler changes to check memory references, for those references whose compile-time normal intentions are usurped at runtime due to buffer overflow or underflow. Two of the most important goals of MPX are to provide this capability at low performance overhead for newly compiled code, and to provide compatibility mechanisms with legacy software components. A direct benefit MPX provides is hardening software against malicious attacks designed to cause or exploit buffer overruns.

Tip: For detailed information about each instruction please read: Intel Architectures Software Developer’s Manual Volume 2: Instruction Set Reference, A-Z

InstructionMeaning
BNDMKCreate a LowerBound and a UpperBound in a register
BNDCLCheck the address of a memory reference against a LowerBound
BNDCUCheck the address of a memory reference against an UpperBound in 1’s compliment form
BNDCNCheck the address of a memory reference against an UpperBound not in 1’s compliment form
BNDMOVLoad from memory or store to memory of the LowerBound and UpperBound to a register or from a register
BNDLDXLoad bounds using address translation
BNDSTXStore bounds using address translation
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