Re: G5 powermacs

[Havard Eidnes <he%NetBSD.org@localhost>]

>   >> NetBSD/macppc OpenFirmware Boot, Revision 1.12
>   5926884
>   Invalid memory access at  %SRR0: 00000000.00e0bed8  %SRR1: 10000000.00003030
>    ok
>   0 >
...
> (gdb) x/i 0xe0bed8
>    0xe0bed8:    b       0xe0ac50
> (gdb)
> (gdb) x/3i 0xe0bed0
>    0xe0bed0:    li      r10,18
>    0xe0bed4:    stw     r10,0(r31)
>    0xe0bed8:    b       0xe0ac50
> (gdb) 
>
> That all looks quite innocent, unless it halts on the "next"
> instruction and the contents of r31 makes it unhappy?
>
> I'll do a re-build of the 7.1 release bits and look at the
> unstripped ofwboot.mrg so that I can get symbols...

Did that, and the insns are a little off, and had to temporarily
remove the -s in ofwboot's Makefile to get the symbols:

(gdb) x/3i 0xe0bed0
   0xe0bed0 <inflate+4884>:     addi    r26,r26,-1
   0xe0bed4 <inflate+4888>:     addi    r25,r25,1
   0xe0bed8 <inflate+4892>:     stb     r10,-1(r25)
(gdb) 
   0xe0bedc <inflate+4896>:     li      r10,18
   0xe0bee0 <inflate+4900>:     stw     r10,0(r31)
   0xe0bee4 <inflate+4904>:     b       0xe0ac5c <inflate+160>
(gdb) 
   0xe0bee8 <inflate+4908>:     lwz     r10,8(r31)
   0xe0beec <inflate+4912>:     cmpwi   cr7,r10,0
   0xe0bef0 <inflate+4916>:     beq     cr7,0xe0bfdc <inflate+5152>
(gdb) 

Regards,

- Håvard