Hi
obviously, i'll need the actual vmlinux kernel file (which i might
not have if i've simply sat down at someone else's system.)
Yes, you need vmlinux if you want the addresses to be resolved back to
the related original symbols. But see below..
also, must that kernel have been configured with DEBUG_INFO? i
realize that selecting that config option gives me access to kernel
variable names, but do i actually need that info? would i be able to
use gdb to dump what i want by address if i have a System.map file
that tells me where "jiffies" lives in kernel space instead?
This is where DEBUG_INFO needed. Without it, vmlinux is pretty useless
because it isn't equipped with symbol table. IIRC, enabling DEBUG_INFO
will compile vmlinux with -g (or maybe -ggdb).
and i'm aware that, even as root, the contents of /proc/kcore might
not be available. under what circumstances is that true?
this config item controls the presence of that --> CONFIG_PROC_KCORE
in short, what is the absolute *minimum* i would need on a system to
be able to dump the contents of some kernel values? thanks.
I think you can conclude it by your own after reading my above short
explanation.
regards,
Mulyadi
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