Sun 3 Xinu 6 bug

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Article #199

#199

From: sdo
Date: Fri, 04 Dec 1987 19:48

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It has recently been discovered that the Sun Optimizing compiler has
trouble generating code in the presence of the asm("...")  statements
of the disable() and restore() macros.  This bug results in register
variables being overwritten in certain cases.  One of the places where
this occurs is in the sleep10() routine, which has the side effect of
setting register d7 to 1.  Cc uses registers d7-d2 for register
variables, when requested, in that order.

Until I hear back from Sun, I would recommend that the system be
compiled WITHOUT the -O (optimizer) option.

Shawn Ostermann

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Shawn Ostermann        ARPA:  sdo@gwen.cs.purdue.edu
                       UUCP:  ...!purdue!sdo
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From: sdo@PURDUE.EDU.UUCP
Newsgroups: comp.os.xinu
Subject: Sun 3 Xinu 6 bug
Message-ID: <8712041948.AA18660@gwen.cs.purdue.edu>
Date: Fri, 4-Dec-87 14:48:01 EST
Article-I.D.: gwen.8712041948.AA18660
Posted: Fri Dec  4 14:48:01 1987
Date-Received: Wed, 9-Dec-87 20:02:02 EST
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