-----Original Message----- From: Gaurav Dhiman [mailto:gaurav4lkg@xxxxxxxxx] Sent: Sunday, August 28, 2005 12:17 PM To: Yagnavarahan Cc: Hemant Mohapatra; kernelnewbies Subject: Re: synchronisation question >How can you get hold of a system call by modifing the IDT. AFAIK, IDT >is the entry point for interrupts routines not for system call >functions. Well, because the syscall table is no longer exported, I'm trying to catch the syscall at the trap handler level (vector 128), perform what I want to, and then transfer control to the actual int 128 vector. But does the linux kernel still use this mechanism or SYSENTER to trap into the kernel? >Well in anycase if you want to modify the IDT, do use some mechanisum >thru which you can disable the interrupts on all CPUs. Well I dont >know if there is some kernel function which can do this or not. Good point. I never gave it a thought. But for a start I guess I can support only single processor machines. Thanks, YV -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
