kgdb: eliminate kgdb_wait(), all cpus enter the same way

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This is a kgdb architectural change to have all the cpus (master or
slave) enter the same function.

A cpu that hits an exception (wants to be the master cpu) will call
kgdb_handle_exception() from the trap handler and then invoke a
kgdb_roundup_cpu() to synchronize the other cpus and bring them into
the kgdb_handle_exception() as well.

A slave cpu will enter kgdb_handle_exception() from the
kgdb_nmicallback() and set the exception state to note that the
processor is a slave.

Previously the salve cpu would have called kgdb_wait().  This change
allows the debug core to change cpus without resuming the system in
order to inspect arch specific cpu information.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

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This commit is contained in:

Jason Wessel 2010-04-02 11:47:02 -05:00

parent cad08acebf

commit 62fae31219

1 changed files with 82 additions and 83 deletions

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kernel/kgdb.c

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