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  • Why does Arm still support short descriptors?

    What I'm asking is ARM Architecture Reference Manual for ARMv8-A  says in AArch32 there are two translation table formats:

    • Short descriptors: 32 bit
    • Long descriptors: 64 bit

    On page G4-4726 (Issue B.b), there are various points listed that each…

  • armv7a/armv8 : Undefined Abort Exception and MMU

    Hi !

    When MMU is enabled, and a undefined abort exception is triggered, are we sure that the address stored in the `lr` / `elr_elx` registers is actually mapped by the MMU, or should I check that before trying to access the address ?

    Best,

    V.