[Crash-utility] [PATCH 4/11] Fix percpu handling for symbols without debuginfo

[Petr Tesarik]

When trying to show a percpu symbol without debuginfo, crash fails like
this:

crash> p fcoe_percpu:0
p: gdb request failed: p *(<data variable, no debug info>*)
0xffff88011e2d4900

This is because gdb does not really fail if the type is unknown:

crash> gdb whatis fcoe_percpu
type = <data variable, no debug info>
crash> gdb info variables fcoe_percpu
All variables matching regular expression "fcoe_percpu":
 
Non-debugging symbols:
0x0000000000014900  fcoe_percpu

Of course, the actual contents cannot be shown in this case, but crash
should at least display the address:
 
crash> p fcoe_percpu:0
&per_cpu(fcoe_percpu, 0) = $1 = (void *) 0xffff88011e214900

Signed-off-by: Petr Tesarik <ptesarik at suse.cz>
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