From mboxrd@z Thu Jan 1 00:00:00 1970 From: DJBARROW@de.ibm.com To: Andrew Cagney Cc: gdb-patches@sourceware.cygnus.com Subject: Re: New gdb 31 & 64 bit patches for S/390 Date: Mon, 18 Jun 2001 03:32:00 -0000 Message-id: X-SW-Source: 2001-06/msg00337.html Hi Andrew, It is a 31 bit architecture owing to an addressing mode limitation ( it never was known as a 32 bit arch though all the registers are 32 bit ). The 370 was 24 bit & a beautiful design decision was made to signify a 31 bit address to use the hi bit of a 32 bit address. After recognising their mistake the zSeries is 64 bit clean. D.J. Barrow Gnu/Linux for S/390 kernel developer eMail: djbarrow@de.ibm.com,barrow_dj@yahoo.com Phone: +49-(0)7031-16-2583 IBM Germany Lab, Schönaicherstr. 220, 71032 Böblingen Andrew Cagney on 15.06.2001 18:52:52 Please respond to Andrew Cagney To: Denis Joseph Barrow/Germany/Contr/IBM@IBMDE cc: gdb-patches@sourceware.cygnus.com, s390-patches@gnu.org, Martin Schwidefsky/Germany/IBM@IBMDE, Christoph Arenz/Germany/IBM@IBMDE Subject: Re: New gdb 31 & 64 bit patches for S/390