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- From: Stephen Usher <Stephen.Usher@earth.ox.ac.uk>
- Subject: Re: MiNT 1.10 re-sync
- Date: Sat, 18 Jun 1994 11:16:09 +0100 (BST)
- In-Reply-To: <9406172113.AA00535@jelal.north.de> from "Juergen Lock" at Jun 17, 94 11:13:50 pm
- Mime-Version: 1.0
-
- >> Hmm.. I think this is bad as many programs have code after an exec which
- >> takes alternate action if the exec fails.
- >
- > well that still works for the usual cases (bad magic, ENOMEM, ENOENT...)
- >the kill should only happen when the executable header looked ok and the
- >error is somewhere later in the file. i.e. you need a broken linker,
- >overwritten blocks, or some filesystem error for this to happen...
-
- Aha.. I see..
-
- >> The alternative, of course, is to
- >> copy the original text elsewhere before loading the new program if the new
- >> program's text is smaller or the same size as the original program. If the
- >> exec fails then it can be copied back and the process resumed.
- >
- > thats another idea but is it worth it? :)
- >
- >> If the new
- >> process being exec()ed is larger than the original program (and the memory
- >> above the current program isn't free) then exec()ing as we do now would be
- >> no problem.
- >
- > hmm but you'd still get a hole?
-
- You'd get a hole anyway as the space left behind by the original program is
- too small for the new one, so it will have to go elsewhere in memory.
-
- >> The only sure way to stop memory fragmentation is to start using paged
- >> memory management. This, of course, can only be done on the 68030 and above.
- >
- > yup
- >>
- >> > or whats on systems that demand-page text instead of loading it all at
- >> >once... do they always check the entire file before?
- >> >>
- >> >> Opinions?
- >> >
- >> > should there be some flag to turn it off? in mint.cnf?
- >
- > cheers
- > Juergen
- >--
- >J"urgen Lock / nox@jelal.north.de / UUCP: ..!uunet!unido!uniol!jelal!nox
- > ...ohne Gewehr
- >PGP public key fingerprint = 8A 18 58 54 03 7B FC 12 1F 8B 63 C7 19 27 CF DA
- >
-
- Steve
-
- --
- ---------------------------------------------------------------------------
- Computer Systems Administrator, Dept. of Earth Sciences, Oxford University.
- E-Mail: steve@uk.ac.ox.earth (JANET) steve@earth.ox.ac.uk (Internet).
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