[PATCH 18/39] NLKD/x86-64 - INT1/INT3 handling changes

[Jan Beulich]

This
- switches the INT3 handler to run on an IST stack (to cope with
  breakpoints set by a kernel debugger on places where the kernel's
  %gs base hasn't been set up, yet); the IST stack used is shared with
  the INT1 handler's
- allows nesting of INT1/INT3 handlers so that one can, with a kernel
  debugger, debug (at least) the user-mode portions of the INT1/INT3
  handling; the nesting isn't actively enabled here since a kernel-
  debugger-free kernel doesn't need it

From: Jan Beulich <jbeulich@xxxxxxxxxx>

(actual patch attached)

Attachment: linux-2.6.14-nlkd-x86_64-debug-stack.patch
Description: Binary data