diff options
-rw-r--r-- | Documentation/DocBook/kgdb.tmpl | 8 | ||||
-rw-r--r-- | lib/Kconfig.kgdb | 11 |
2 files changed, 15 insertions, 4 deletions
diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl index e8acd1f03456..54d3b158d080 100644 --- a/Documentation/DocBook/kgdb.tmpl +++ b/Documentation/DocBook/kgdb.tmpl | |||
@@ -98,6 +98,14 @@ | |||
98 | "Kernel debugging" select "KGDB: kernel debugging with remote gdb". | 98 | "Kernel debugging" select "KGDB: kernel debugging with remote gdb". |
99 | </para> | 99 | </para> |
100 | <para> | 100 | <para> |
101 | It is advised, but not required that you turn on the | ||
102 | CONFIG_FRAME_POINTER kernel option. This option inserts code to | ||
103 | into the compiled executable which saves the frame information in | ||
104 | registers or on the stack at different points which will allow a | ||
105 | debugger such as gdb to more accurately construct stack back traces | ||
106 | while debugging the kernel. | ||
107 | </para> | ||
108 | <para> | ||
101 | Next you should choose one of more I/O drivers to interconnect debugging | 109 | Next you should choose one of more I/O drivers to interconnect debugging |
102 | host and debugged target. Early boot debugging requires a KGDB | 110 | host and debugged target. Early boot debugging requires a KGDB |
103 | I/O driver that supports early debugging and the driver must be | 111 | I/O driver that supports early debugging and the driver must be |
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb index 2cfd2721f7ed..9b5d1d7f2ef7 100644 --- a/lib/Kconfig.kgdb +++ b/lib/Kconfig.kgdb | |||
@@ -4,14 +4,17 @@ config HAVE_ARCH_KGDB | |||
4 | 4 | ||
5 | menuconfig KGDB | 5 | menuconfig KGDB |
6 | bool "KGDB: kernel debugging with remote gdb" | 6 | bool "KGDB: kernel debugging with remote gdb" |
7 | select FRAME_POINTER | ||
8 | depends on HAVE_ARCH_KGDB | 7 | depends on HAVE_ARCH_KGDB |
9 | depends on DEBUG_KERNEL && EXPERIMENTAL | 8 | depends on DEBUG_KERNEL && EXPERIMENTAL |
10 | help | 9 | help |
11 | If you say Y here, it will be possible to remotely debug the | 10 | If you say Y here, it will be possible to remotely debug the |
12 | kernel using gdb. Documentation of kernel debugger is available | 11 | kernel using gdb. It is recommended but not required, that |
13 | at http://kgdb.sourceforge.net as well as in DocBook form | 12 | you also turn on the kernel config option |
14 | in Documentation/DocBook/. If unsure, say N. | 13 | CONFIG_FRAME_POINTER to aid in producing more reliable stack |
14 | backtraces in the external debugger. Documentation of | ||
15 | kernel debugger is available at http://kgdb.sourceforge.net | ||
16 | as well as in DocBook form in Documentation/DocBook/. If | ||
17 | unsure, say N. | ||
15 | 18 | ||
16 | if KGDB | 19 | if KGDB |
17 | 20 | ||