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Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/DocBook/kgdb.tmpl | 18 |
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 @@ | |||
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> | ||
109 | If the architecture that you are using supports the kernel option | ||
110 | CONFIG_DEBUG_RODATA, you should consider turning it off. This | ||
111 | option will prevent the use of software breakpoints because it | ||
112 | marks certain regions of the kernel's memory space as read-only. | ||
113 | If kgdb supports it for the architecture you are using, you can | ||
114 | use hardware breakpoints if you desire to run with the | ||
115 | CONFIG_DEBUG_RODATA option turned on, else you need to turn off | ||
116 | this option. | ||
117 | </para> | ||
118 | <para> | ||
101 | Next you should choose one of more I/O drivers to interconnect debugging | 119 | Next you should choose one of more I/O drivers to interconnect debugging |
102 | host and debugged target. Early boot debugging requires a KGDB | 120 | host and debugged target. Early boot debugging requires a KGDB |
103 | I/O driver that supports early debugging and the driver must be | 121 | I/O driver that supports early debugging and the driver must be |