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Date: Mon, 5 May 2003 08:05:58 -0700
To: Richard Henderson <rth@twiddle.net>
Cc: David Mosberger-Tang <David.Mosberger@acm.org>,
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Subject: Re: [PATCH] fix vsyscall unwind information
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>>>>> On Mon, 5 May 2003 00:42:48 -0700, Richard Henderson <rth@twiddle.net> said:

  >> If not, could one be added?

  Richard> Why?  Certainly it isn't needed for x86.

Certain applications (such as debuggers) want to know.  Sure, you can
do symbol matching (if you have the symbol table) or code-reading
(assuming you know the exact sigreturn sequence), but having a marker
would be more reliable and faster.

	--david