Companion

Segment is from a fixed VM library; used for overlap checking in the link editor

Segment is in the high part of the VM space; low part is zero-filled (used for stacks in core files)

Segment contains no relocated data and nothing relocated to it; safe to replace without relocation

All pages are protected except first page if segment starts at file offset 0

Segment becomes read-only after fixups

Creates a MachoSegmentFlag from a string

Creates a MachoSegmentFlag from its name