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Article #113Re: FIX for immediate Epoch-4.0p0 "memcpy(0) crash" when using GCC 2.1
From: Simon Marshall
Date: Wed, 15 Apr 1992 12:53
Date: Wed, 15 Apr 1992 12:53
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2257 bytes
This sounds remarkably like the problem I had; I think you may have
jumped on the wrong reason.
| * Config: "s-bsd4-2.h", "m-sun3.h", and the extra "config.h" lines
|
| #define START_FILES crt0.o /lib/Mcrt1.o
| #define LIB_GCC "/usr/gnu/lib/gcc-lib/sun3-sunos3/2.1/libgcc.a" -lc
| #define LIBS_DEBUG
|
| but should apply to any system/configuration where it
| is unsafe to reference nonexisting arguments of
| function calls.
| * Solution: An investigation of message() reveals that it is
| declared with four arguments yet is not passed more
| than two in this case (!). The following fix uses the
| GCC <stdarg.h> include file to retrieve the correct
| number of arguments when GCC is used.
Aha! I think maybe that -lc which you added is pulling in a
definition for _doprnt(), which is what message() calls to do the actual
printing. Epoch intends it to be its own _doprnt(), but instead you
link in the _doprnt() in libc.a and epoch uses this. This version takes
different args. To check, see if _doprnt() is in libc.a.
My solution was to take the code I needed from libc.a (there's not
much, just a few files) and build my own libc.a to link in. No hacking
of epoch code needed.
Maybe the real answer would be to use a unique name for the function
supplied with epoch...?
Simon.
_______________________________________________________________________________
Simon Marshall, Dept. of Computer Science, University of Hull, Hull HU6 7RX, UK
"Football isn't about life and death. It's more important than that." Bill
Email: S.Marshall@Hull.ac.uk Phone: +44 482 465181 Fax: 466666 Shankley
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Newsgroups: gnu.epoch.misc Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!sequent.cc.HUll.ac.UK!S.Marshall From: S.Marshall@sequent.cc.HUll.ac.UK (Simon Marshall) Subject: Re: FIX for immediate Epoch-4.0p0 "memcpy(0) crash" when using GCC 2.1 Message-ID: <9204151156.AA12335@a.cs.uiuc.edu> Sender: daemon@cis.ohio-state.edu Organization: GNUs Not Usenet Distribution: gnu Date: Wed, 15 Apr 1992 12:53:25 GMT Lines: 37