Path: utzoo!mnetor!uunet!husc6!necntc!necis!mrst!sdti!mjy
From: mjy@sdti.UUCP (Michael J. Young)
Newsgroups: comp.unix.wizards
Subject: Re: Aliasing text and data segments of a process
Message-ID: <207@sdti.UUCP>
Date: 27 Jan 88 18:08:38 GMT
References: <11476@brl-adm.ARPA>
Reply-To: mjy@sdti.UUCP (0000-Michael J. Young)
Organization: Software Development Technologies, Sudbury MA
Lines: 15

In article <11476@brl-adm.ARPA> rbj@icst-cmr.arpa (Root Boy Jim) writes:
>(1) Text and Data glommed together with only limits protection.
> ...
>Each format has its own advantages and drawbacks. If you want to set
>breakpoints in code, you must use the first type.

Actually, setting breakpoints is no problem even with the other three types.
That's what the ptrace(2) system call is for.  I suppose you could even
use ptrace() to "poke" an entire function into the text space.  The problem
arises when you want to change the size of the text region; ptrace() doesn't
let you do that.
-- 
Mike Young - Software Development Technologies, Inc., Sudbury MA 01776
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