John Baldwin 756b49d46f Various fixes to kgdb. Port revision bumped since kgdb is enabled by ... default. - kgdb -n now permits any valid string to be used instead of only permitting numbers. In particular, this allows 'kgdb -n last' to be used to open the most recent vmcore. - kgdb will now try to determine the list of kernel modules even if the kernel binary does not include debug symbols. This works fine in kernels that have the changes in r290728. - Mark trapframes as "signal trampoline frames". GDB assumes that "normal" frames will never call into a NULL PC. Instead, it assumes that calling a NULL PC will result in an exception (and thus a signal being posted resulting in a signal frame). A trap for a NULL function pointer would thus stop unwinding once it hit the frame with a NULL PC. Marking the trapframes as a signal frame tells GDB it is ok to unwind past a NULL PC. One side effect is that frames in the asm handler now display as "signal handler called" instead of the raw line in assembly. Perhaps at some point it would be nice to mark these up the way ddb does with the trap number, etc. but GDB's stack code doesn't support custom frame printers. PR: 206044 Reviewed by: luca.pizzamiglio@gmail.com (maintainer) Approved by: koobs		2016-01-11 17:36:13 +00:00
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files	Various fixes to kgdb. Port revision bumped since kgdb is enabled by	2016-01-11 17:36:13 +00:00
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Makefile	Various fixes to kgdb. Port revision bumped since kgdb is enabled by	2016-01-11 17:36:13 +00:00
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