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kgdb: remove the requirement for CONFIG_FRAME_POINTER

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There is no technical reason that the kgdb core requires frame
pointers.  It is up to the end user of KGDB to decide if they need
them or not.

[ anemo@mba.ocn.ne.jp: removed frame pointers on mips ]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2008-08-01 08:39:34 -05:00
parent 94ad374a07
commit 5f5ddfb360
2 changed files with 15 additions and 4 deletions
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8
Documentation/DocBook/kgdb.tmpl
View file

@ -98,6 +98,14 @@
"Kernel debugging" select "KGDB: kernel debugging with remote gdb". "Kernel debugging" select "KGDB: kernel debugging with remote gdb".
</para> </para>
<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>
Next you should choose one of more I/O drivers to interconnect debugging Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be I/O driver that supports early debugging and the driver must be

11
lib/Kconfig.kgdb
View file

@ -4,14 +4,17 @@ config HAVE_ARCH_KGDB
menuconfig KGDB menuconfig KGDB
bool "KGDB: kernel debugging with remote gdb" bool "KGDB: kernel debugging with remote gdb"
select FRAME_POINTER
depends on HAVE_ARCH_KGDB depends on HAVE_ARCH_KGDB
depends on DEBUG_KERNEL && EXPERIMENTAL depends on DEBUG_KERNEL && EXPERIMENTAL
help help
If you say Y here, it will be possible to remotely debug the If you say Y here, it will be possible to remotely debug the
kernel using gdb. Documentation of kernel debugger is available kernel using gdb. It is recommended but not required, that
at http://kgdb.sourceforge.net as well as in DocBook form you also turn on the kernel config option
in Documentation/DocBook/. If unsure, say N. CONFIG_FRAME_POINTER to aid in producing more reliable stack
backtraces in the external debugger. Documentation of
kernel debugger is available at http://kgdb.sourceforge.net
as well as in DocBook form in Documentation/DocBook/. If
unsure, say N.
if KGDB if KGDB