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

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 <[email protected]>

(actual patch attached)

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

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• Follow-Ups:
  • Re: [PATCH 18/39] NLKD/x86-64 - INT1/INT3 handling changes
    • From: Andi Kleen <[email protected]>
  • [PATCH 19/39] NLKD/x86-64 - stack-pointer-invalid markers
    • From: "Jan Beulich" <[email protected]>

• References:
  • [PATCH 0/39] NLKD - Novell Linux Kernel Debugger
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 1/39] NLKD - an alternative kallsyms approach
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 2/39] NLKD - an alternative early ioremap approach
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 3/39] NLKD - early/late CPU up/down notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 6/39] NLKD - early panic notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 7/39] NLKD - task create/destroy notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 8/39] NLKD - rmmod notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 9/39] NLKD - hotkey notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 10/39] NLKD - console layout change notification
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 11/39] NLKD - time adjustment
    • From: "Jan Beulich" <[email protected]>
  • [PATCH 13/39] NLKD/x86-64 - time adjustment
    • From: "Jan Beulich" <[email protected]>

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