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Commit 9b558035 authored by Kieran Bingham's avatar Kieran Bingham Committed by Linus Torvalds
Browse files

scripts/gdb: add documentation example for radix tree 

Provide a worked example for utilising the lx_radix_tree_lookup function

Link: http://lkml.kernel.org/r/e786008ac5aec4b84198812805b326d718bdeb4b.1462865983.git.jan.kiszka@siemens.com


Signed-off-by: default avatarKieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e127a73d

Documentation/gdb-kernel-debugging.txt

+21 −0
Original line number Diff line number Diff line
@@ -139,6 +139,27 @@ Examples of using the Linux-provided gdb helpers 
      start_comm = "swapper/2\000\000\000\000\000\000"

    }



 o Dig into a radix tree data structure, such as the IRQ descriptors:

    (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)

    $6 = {

      irq_common_data = {

        state_use_accessors = 67584,

        handler_data = 0x0 <__vectors_start>,

        msi_desc = 0x0 <__vectors_start>,

        affinity = {{

            bits = {65535}

          }}

      },

      irq_data = {

        mask = 0,

        irq = 18,

        hwirq = 27,

        common = 0xee803d80,

        chip = 0xc0eb0854 <gic_data>,

        domain = 0xee808000,

        parent_data = 0x0 <__vectors_start>,

        chip_data = 0xc0eb0854 <gic_data>

      } <... trimmed ...>



List of commands and functions

------------------------------