On Tue, Feb 5, 2013 at 3:02 AM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> wrote:
On Tue, Feb 5, 2013 at 9:13 AM, Shraddha Kamat <sh2008ka@xxxxxxxxx> wrote:AFAIK, it's a virtual "library", which act as a "hub" when user space
> What is a kernel DSO ? I encountered it while
> I was reading perf code.
application does system call.
Specifically, when one does system call, it jumps to this DSO. Then,
IIRC, this DSO determines whether to use int 80h or sysenter/syscall
(for x86). Following it up, system call flows as usual.
You can see this DSO's address by using cat /proc/self/maps. Look for "vdso".
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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Thank you
Warm Regards
Anuz
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