Re: How to disable Altivec registers in powerpc GDB ?

[Yao Qi <qiyaoltc at gmail dot com>]

James Murray <james@nscc.info> writes:

> gdb appears to think that my target has the altivec vector registers,
> although it does not. It is a Freescale MPC5xxx embedded part.
>
> e.g. when trying to debug the embedded target via Eclipse, I'm seeing
> this:
> (gdb) 
> 5624-data-list-register-names
> 5624^done,register-names=["r0","r1","r2","r3","r4","r5","r6","r7","r8","r9","r10","r11","r12","r13","r14","r15","r16","r17","r18","r19","r20","r21","r22","r23","r24","r25","r26","r27","r28","r29","r30","r31","f0","f1","f2","f3","f4","f5","f6","f7","f8","f9","f10","f11","f12","f13","f14","f15","f16","f17","f18","f19","f20","f21","f22","f23","f24","f25","f26","f27","f28","f29","f30","f31","pc","msr","cr","lr","ctr","xer","fpscr","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","vr0","vr1","vr2","vr3","vr4","vr5","vr6","vr7","vr8","vr9","vr10","vr11","vr12","vr13","vr14","vr15","vr16","vr17","vr18","vr19","vr20","vr21","vr22","vr23","vr24","vr25","vr26","vr27","vr28","vr29","vr30","vr31","vscr","vrsave","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","dl0","dl1","dl2","dl3","dl4","dl5","dl6","dl7","dl8","dl9","dl10","dl11","dl12","dl13","dl14","dl15"]
> (gdb)
>
> The target doesn't have that many registers and the remote debugger
> returns an error code and drops the gdb connection if any are accessed.
> I'd like gdb to only report the basic 32 GPRs and 8 specials.

Your debug stub/probe should return the right target description for
your processor, to tell GDB that processor doesn't have these altivec
registers.  See
https://sourceware.org/gdb/current/onlinedocs/gdb/Target-Descriptions.html

-- 
Yao (éå)