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To: Andrew Cagney <ac131313@cygnus.com>
cc: Jim Blandy <jimb@cygnus.com>, gdb-patches@sources.redhat.com,
        Richard.Earnshaw@arm.com
Reply-To: Richard.Earnshaw@arm.com
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Subject: Re: RFA: char is unsigned on some architectures 
In-reply-to: Your message of "Wed, 19 Dec 2001 22:48:45 GMT."
             <3C21194D.4090605@cygnus.com> 
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Date: Mon, 07 Jan 2002 09:13:00 -0000
From: Richard Earnshaw <rearnsha@arm.com>
X-SW-Source: 2002-01/txt/msg00100.txt.bz2

> > ISO C specifies that `char' acts like either `signed char' or
> > `unsigned char'.  At the moment, GDB assumes that `char' is `signed
> > char'.  This patch allows the architecture to specify the correct
> > answer, and sets the value correctly for the IBM S/390 architecture.
> > 
> > 2001-12-19  Jim Blandy  <jimb@redhat.com>
> > 
> > * gdbarch.sh (TARGET_CHAR_SIGNED): New macro.
> > 	* gdbarch.c, gdbarch.h: Regenerated.
> > 	* gdbtypes.c (build_gdbtypes): If TARGET_CHAR_SIGNED is zero,
> > 	set the TYPE_FLAG_UNSIGNED bit on the type.
> > 	* s390-tdep.c (s390_gdbarch_init): On the S/390, characters
> > 	are unsigned by default.
> > 
> 
> 
> Hmm, the rs6000 and prodogy (Hmm, IBM ...) are also unsigned.  Want to 
> add that ``obvious'' tweek?
> 
> Andrew
> 

And the ARM.

R.