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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-01 22:45:09 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-01 22:45:09 +0400
commit31582b094d640fdab3fd29237b348a4c7c8646fb (patch)
tree52ee679e7dab9d6627d69d87470d62fef7a651d6 /Documentation
parentdf1efe6f871e2d3f83e6ad7b7a1d2b728b478fc2 (diff)
parent25fc999913839a45cbb48ac7872e67f7521e7ed9 (diff)
downloadlinux-31582b094d640fdab3fd29237b348a4c7c8646fb.tar.xz
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb: fix gdb serial thread queries kgdb: fix kgdb_validate_break_address to perform a mem write kgdb: remove the requirement for CONFIG_FRAME_POINTER
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/DocBook/kgdb.tmpl18
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl
index e8acd1f03456..372dec20c8da 100644
--- a/Documentation/DocBook/kgdb.tmpl
+++ b/Documentation/DocBook/kgdb.tmpl
@@ -98,6 +98,24 @@
"Kernel debugging" select "KGDB: kernel debugging with remote gdb".
</para>
<para>
+ It is advised, but not required that you turn on the
+ CONFIG_FRAME_POINTER kernel option. This option inserts code to
+ into the compiled executable which saves the frame information in
+ registers or on the stack at different points which will allow a
+ debugger such as gdb to more accurately construct stack back traces
+ while debugging the kernel.
+ </para>
+ <para>
+ If the architecture that you are using supports the kernel option
+ CONFIG_DEBUG_RODATA, you should consider turning it off. This
+ option will prevent the use of software breakpoints because it
+ marks certain regions of the kernel's memory space as read-only.
+ If kgdb supports it for the architecture you are using, you can
+ use hardware breakpoints if you desire to run with the
+ CONFIG_DEBUG_RODATA option turned on, else you need to turn off
+ this option.
+ </para>
+ <para>
Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be