[Crash-utility] Is there a way to get hex immediates in ppc disassembly?

[James Washer]

Thanks Dave.. once I build up sufficient frustration, I'll have a go at
"fixing" this

 - jim

On Mon, 2008-06-23 at 09:49 -0400, Dave Anderson wrote:
> James Washer wrote:
> > I suspect crash is simply using a standard disassembler, but it's
> > driving me nuts that I get output like:
> > 0xc0000000000cbc18 <.do_sys_open+0xa8>: xori    r29,r29,16384
> > 
> > rather than hex "immediates"... Is there anyway to alter this behavior?
> > 
> > 
> > thanks
> >  - jim
> 
> Hi Jim,
> 
> Crash uses the gdb disassembly code, although each architecture has a
> filtering routine that re-translates the <function-name+offset>
> at the beginning (sometimes gdb does it incorrectly), and also
> displays the offset value depending upon the hex/dec setting
> you've got in effect at the time.  Other arches also add a
> <function-name+offset> at the end of a line when the gdb
> disassembly only displays "call 0xaddress".
> 
> But to answer your question, with respect to intermediate
> values, the x86, x86_64, and I think the ia64, all show
> intermediates in hexadecimal.  Kind of strange that the
> ppc64 does it differently.  I do tinker with gdb's output-radix
> and output-format internal variables, but they don't affect
> disassembly output at all.
> 
> Anyway, I don't know of any way to change gdb's behaviour
> although there very well may be an internal variable that
> controls it.  The real answer can be found by tracking
> the combination of the gdb-6.1/opcodes/ppc-opcodes.c,
> gdb-6.1/opcodes/ppc-opc.c, gdb-6.1/gdb/disasm.c and
> gdb-6.1/printcmd.c code -- a PITA to follow -- but the real
> answer is in there somewhere.  I do note that the address+offset
> output is hardwired to print decimal in print_address_symbolic()
> function in gdb-6.1/gdb/printcmd.c, but I haven't tracked down
> where the intermediates get printed.  If that were determined,
> then it seems that it could be tinkered with based upon
> crash's hex/dec setting.
> 
> Dave
> 
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