Trying to get saddr, scode, and smask from ptrace

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Article #12243

#12243

From: Benson Margulies
Date: Tue, 25 Apr 1989 23:17

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I want to see the signal code and saved mask for a ptraced child stopped
on a signal.

So I coded up calls to ptrace to read the apparently appropriate slots
from the u area, via PTRACE_PEEKUSER. I used the offset of those slots in
the uarea as my "addr" argument to ptrace.

I got garbage.

Are these overwritten by this point? Is there something I don't know?

(All in Sunos4.0.1, on sun3's)
-- 
Benson I. Margulies

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: odi!benson@uunet.uu.net (Benson Margulies)
Newsgroups: comp.sys.sun
Subject: Trying to get saddr, scode, and smask from ptrace
Keywords: SunOS
Message-ID: <297@odi.UUCP>
Date: 25 Apr 89 23:17:41 GMT
Sender: usenet@rice.edu
Organization: Object Design Inc., Burlington, MA
Lines: 14
Approved: Sun-Spots@rice.edu
Original-Date: 11 Apr 89 13:22:33 GMT
X-Sun-Spots-Digest: Volume 7, Issue 248, message 11 of 13