Looked the last few lines of this:
http://lkml.org/lkml/2003/7/10/74
I am trying to trying to understand the control path of IDT in userspace
vs kernelspace:
1. The patch mentioned NMI can returned back to userspace.....is that
correct? How and where in the kernel is this return to userspace
controlled/directed? Generally, all other interrupt will not return to
userspace right? So why? Is that because the IDT table will control
the return path? Then what happened to that of NMI handler instead?
2. When in userspace, the IDT table - which have the return address of
the functions in the kernel...cannot be used. So how is the control
path of "int 3" looked like when processes execute it? Userspace will
have exception handling etc....but I think all these processing comes
after the kernel handle the exception right? And these userspace
exception are therefore controlled by kernel - where is it?
--
To unsubscribe from this list: send an email with
"unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
Please read the FAQ at http://kernelnewbies.org/FAQ
