HELPLIB.HLB  —  RTL Routines, LIB$  LIB$I64_GET_PREV_INVO_CONTEXT, Argument
 invo_context

    OpenVMS usage:invo_context_blk
    type:         structure
    access:       modify only
    mechanism:    by reference

    Address of a valid invocation context block. The given invocation
    context block is updated to represent the context of the previous
    (calling) frame.

    The LIBICB$V_BOTTOM_OF_STACK flag of the invocation context block
    is set if the target frame represents the end of the invocation
    call chain or if stack corruption is detected.
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