Re: Question about inter-thread stack references

From	glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups	comp.compilers
Subject	Re: Question about inter-thread stack references
Date	2015-01-18 23:24 +0000
Organization	Aioe.org NNTP Server
Message-ID	<15-01-034@comp.compilers> (permalink)
References	<15-01-015@comp.compilers> <15-01-027@comp.compilers> <15-01-033@comp.compilers>

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glen herrmannsfeldt <gah@ugcs.caltech.edu> wrote:

(snip, I wrote)
> Yes. OS/360 and successors use a doubly-linked list for linkage and
> register saving, and for reentrant routines usually local variables,
> too.

(snip)

> I believe that OS/360 MVT subtasks run in the same protection key
> as the parent. With MVS, ordinary user tasks all run with the same
> protection key, with segment and page tables updated as needed.

(snip)

> [Yes, OS subtasks started with ATTACH all run in the same address
> space. -John]

Well, all of OS/360, OS/VS1 and OS/VS2 runs in one address space.
For OS/360 all real addresses, for OS/VS1 and OS/VS2 a single 16MB
virtual address space.  (MVS is where they started using separate
address spaces.)

Much of the OS is key zero, and readable by everyone.

But I think you are agreeing that subtasks run with the same key
as the parent.

-- glen
[Yes.  Now back to compilers. -John]

Thread

Question about inter-thread stack references Ivan Godard <ivan@ootbcomp.com> - 2015-01-15 23:54 -0800
  Re: Question about inter-thread stack references Louis Krupp <lkrupp@nospam.pssw.com.invalid> - 2015-01-16 22:28 -0700
    Re: Question about inter-thread stack references glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-01-17 18:46 +0000
  Re: Question about inter-thread stack references George Neuner <gneuner2@comcast.net> - 2015-01-18 01:58 -0500
    Re: Question about inter-thread stack references glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-01-18 21:47 +0000
      Re: Question about inter-thread stack references glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-01-18 23:24 +0000
  Re: Question about inter-thread stack references Stefan Monnier <monnier@iro.umontreal.ca> - 2015-01-18 08:35 -0500
  Re: Question about inter-thread stack references Kaz Kylheku <kaz@kylheku.com> - 2015-01-18 17:12 +0000
  Re: Question about inter-thread stack references Ivan Godard <ivan@ootbcomp.com> - 2015-01-18 12:49 -0800
  Re: Question about inter-thread stack references jgk@panix.com (Joe keane) - 2015-01-25 09:27 +0000
    Re: Question about inter-thread stack references Kaz Kylheku <kaz@kylheku.com> - 2015-01-25 18:46 +0000
      Re: Question about inter-thread stack references jgk@panix.com (Joe keane) - 2015-01-27 02:53 +0000

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