56 lines
1.8 KiB
Plaintext
56 lines
1.8 KiB
Plaintext
Since COFF-encapsulation is obsolete, this may not be needed anymore.
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Return-Path: <jkp@sauna.hut.fi>
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Date: Mon, 10 Apr 89 10:13:45 +0300
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From: Jyrki Kuoppala <jkp@sauna.hut.fi>
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Sender: jkp@sauna.hut.fi
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To: info-gcc@prep.ai.mit.edu
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Subject: Kernel fix needed for Altos 3068 to get coff-encapsulation working right
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Organization: Helsinki University of Technology, Finland.
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Here's a description how to fix a kernel bug in Altos 3068 and get
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gcc-compiled programs working.
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Author: Jyrki Kuoppala (jkp@cs.hut.fi)
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Last modified: Mon Apr 10 09:28:40 1989
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There's a bug in the Altos 3068 kernel that causes gcc-compiled
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programs to fail in certain situations when the machine has a heavy
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load and also in some other situations. The bug exists at least in
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SVR 2.2 1.0gT1 and SVR 2.2 1.0e.
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If you have source code to your system, apply the following change to
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os/exec.c (function gethead):
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Change the lines containing
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u.u_exdata.ux_tstart = sizeof(struct naout) +
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sizeof(struct filhd) + (ep->ef.nscns * sizeof(struct scnhdr));
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to
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u.u_exdata.ux_tstart = u.u_exdata.ux_txtorg;
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If you only have binary, use sdb to find out the address of the
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previous lines (on our system it's gethead+0x140) and use your
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favourite binary editor to change the bytes '3036 0162 fffc 0002 0280
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0000' to '23f9 01fb f4ca 01fb f4c2 6016'. This may or may not work in
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your case, depending on the version of the operating system and the
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phase of the moon.
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Here's what is just before gethead+0x140 to ease finding out the right place:
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0x9224 (gethead+0x122): 23f9 01fb f4ca 01fb f4ce mov.l &0x1fbf4ca.L,&0
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x1fbf4ce.L []
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0x922e (gethead+0x12c): 23f9 01fb f4c6 01fb f4ca mov.l &0x1fbf4c6.L,&0
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x1fbf4ca.L []
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0x9238 (gethead+0x136): 23f9 01fb f4c2 01fb f4c6 mov.l &0x1fbf4c2.L,&0
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x1fbf4c6.L []
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Good luck !
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//Jyrki
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jkp@cs.hut.fi
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