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Annotation of GNUtools/cc/README.ALTOS, revision 1.1

1.1     ! root        1: Since COFF-encapsulation is obsolete, this may not be needed anymore.
        !             2: 
        !             3: Return-Path: <[email protected]>
        !             4: Date: Mon, 10 Apr 89 10:13:45 +0300
        !             5: From: Jyrki Kuoppala <[email protected]>
        !             6: Sender: [email protected]
        !             7: To: [email protected]
        !             8: Subject: Kernel fix needed for Altos 3068 to get coff-encapsulation working right
        !             9: Organization: Helsinki University of Technology, Finland.
        !            10: 
        !            11: Here's a description how to fix a kernel bug in Altos 3068 and get
        !            12: gcc-compiled programs working.
        !            13: 
        !            14: Author: Jyrki Kuoppala ([email protected])
        !            15: Last modified: Mon Apr 10 09:28:40 1989
        !            16: 
        !            17: There's a bug in the Altos 3068 kernel that causes gcc-compiled
        !            18: programs to fail in certain situations when the machine has a heavy
        !            19: load and also in some other situations.  The bug exists at least in
        !            20: SVR 2.2 1.0gT1 and SVR 2.2 1.0e.
        !            21: 
        !            22: If you have source code to your system, apply the following change to
        !            23: os/exec.c (function gethead):
        !            24: 
        !            25: Change the lines containing
        !            26: 
        !            27:                u.u_exdata.ux_tstart = sizeof(struct naout) +
        !            28:                        sizeof(struct filhd) + (ep->ef.nscns * sizeof(struct scnhdr));
        !            29: 
        !            30: to
        !            31: 
        !            32:                u.u_exdata.ux_tstart = u.u_exdata.ux_txtorg;
        !            33: 
        !            34: If you only have binary, use sdb to find out the address of the
        !            35: previous lines (on our system it's gethead+0x140) and use your
        !            36: favourite binary editor to change the bytes '3036 0162 fffc 0002 0280
        !            37: 0000' to '23f9 01fb f4ca 01fb f4c2 6016'.  This may or may not work in
        !            38: your case, depending on the version of the operating system and the
        !            39: phase of the moon.
        !            40: 
        !            41: Here's what is just before gethead+0x140 to ease finding out the right place:
        !            42: 
        !            43: 0x9224 (gethead+0x122):         23f9 01fb f4ca 01fb f4ce mov.l &0x1fbf4ca.L,&0
        !            44: x1fbf4ce.L      []
        !            45: 0x922e (gethead+0x12c):         23f9 01fb f4c6 01fb f4ca mov.l &0x1fbf4c6.L,&0
        !            46: x1fbf4ca.L      []
        !            47: 0x9238 (gethead+0x136):         23f9 01fb f4c2 01fb f4c6 mov.l &0x1fbf4c2.L,&0
        !            48: x1fbf4c6.L      []
        !            49: 
        !            50: Good luck !
        !            51: 
        !            52: //Jyrki
        !            53: 
        !            54: [email protected]
        !            55: 

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