On 7/15/09, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote: > > i'm aware of a number of ways to debug kernel space variables from > user space, but i'm not sure there's a way to do it if you're > extremely limited in the information you have at hand. > > the scenario: a running 64-bit fedora 11 system. there is no > "vmlinux" file at hand -- all i have is the vmlinuz file representing > the running kernel. i have "gdb" installed, and there exist the files > /proc/kcore and /proc/kallsyms. but given only that, is there any way > to list the current value of, say, the kernel variable "jiffies"? > > i can see in /proc/kallsyms the entry > > ffffffffff600880 D __jiffies > > but without the vmlinux file, i don't think gdb will do me any good. > or am i misremembering? > > rday IIRC, we've talked about it around 2 years ago. In fact, I wrote it down in my blog. Is this what you're looking for? http://the-hydra.blogspot.com/2007/07/observing-kernel-variables-content-with.html PS: you might need to adapt how much byte you read since you're using 64 bit now... -- regards, Mulyadi Santosa Freelance Linux trainer blog: the-hydra.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
