From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Buck <jbuck@synopsys.com>
To: frichard@bbn.com
Cc: egcs@cygnus.com
Subject: Re: sparc64 support for Solaris
Date: Fri, 17 Oct 1997 19:06:00 -0000
Message-id: <199710180206.TAA24784@atrus.synopsys.com>
References: <199710172351.TAA30864@bbn.com>
X-SW-Source: 1997-10/msg00767.html

> I was wondering how I can enable 64 bit support and v9 instruction
> scheduling for an Ultra 1 Model 170 running Solaris2.5.  This is
> apparently not possible when the target is "sparc-sun-solaris2.5.1".

If you turned it on, your process would bomb at the first context switch.
Solaris 2.5.x does not save the 64-bit register state, so basically some
registers will come back randomized (from other processes?).

Solaris 2.6 is supposed to fix this.  Also, HAL/OS, HAL's patched
version of Solaris 2.4, fixes it.  So please don't turn it on on 2.5.1
(unless you are cross-compiling).  Very bad things will happen.