Re: New gdb 31 & 64 bit patches for S/390

DJBARROW
2001-06-18T03:32:00Z

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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, SchÃ¶naicherstr. 220, 71032 BÃ¶blingen

Andrew Cagney <ac131313@cygnus.com> on 15.06.2001 18:52:52

Please respond to Andrew Cagney <ac131313@cygnus.com>

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