On Tue, Feb 5, 2013 at 3:02 AM, Mulyadi Santosa <mulyadi.santosa@gmail.com>wrote:
On Tue, Feb 5, 2013 at 9:13 AM, Shraddha Kamat <sh2008ka@gmail.com> wrote:
What is a kernel DSO ? I encountered it while I was reading perf code.
AFAIK, it's a virtual "library", which act as a "hub" when user space 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".
Some googling http://lkml.indiana.edu/hypermail/linux/kernel/0306.2/0674.html
-- regards,
Mulyadi Santosa Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Thank you Warm Regards Anuz