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git2svn
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2021-09-12T18:33:47.665115Z
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V 820
genoffset: simplify and rewrite in sh

genoffset used the fully generic ASSYM macro to generate the offsets
needed for the thread_lite structure. However, since these are offsets
into a structure, they will always be necessarily small and positive. As
such, just create a simple character array of the right size and use a
naming convention such that we can recover the field name, structure
name and type. Use nm -t d and sort -n to sort these into order, then
loop over the resutls to generate the thread_lite structure.

MFC After:		2 weeks
Reviewed by:		kib, markj (earlier versions)
Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D31203

(cherry picked from commit 824897a3aea5ca22db8cb7d5b404697a1de1210a)

Git Hash:   1f4475725f0e6a65b6a07f927a278b72a620d8ba
Git Author: imp@FreeBSD.org
END