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A regression to the kgdb core was found in the case of using the
CONFIG_DEBUG_RODATA kernel option. When this option is on, a breakpoint
cannot be written into any readonly memory page. When an external
debugger requests a breakpoint to get set, the
kgdb_validate_break_address() was only checking to see if the address
to place the breakpoint was readable and lacked a write check.
This patch changes the validate routine to try reading (via the
breakpoint set request) and also to try immediately writing the break
point. If either fails, an error is correctly returned and the
debugger behaves correctly. Then an end user can make the
descision to use hardware breakpoints.
Also update the documentation to reflect that using
CONFIG_DEBUG_RODATA will inhibit the use of software breakpoints.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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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>
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kgdboe is not presently included kgdb, and there should be no
references to it.
Also fix the tcp port terminal connection example.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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Two minor fixes to the kgdb documentation.
Signed-off-by: Grzegorz Chwesewicz, Chilan <grzegorz.chwesewicz@chilan.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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Minor cleanups to kgdb docs.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Add in the kgdb documentation for kgdb.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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