MIPS: mm: Add debug information for userland SIGSEGV signals.

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Commit 41c594ab65 ("[MIPS] MT: Improved multithreading support.")
removed useful debug information for userland segmentation faults.
This patch bring this back along with the ability to determine the
name of the object file where the EPC and RA registers point at.
Furthermore, we select the SYSCTL_EXCEPTION_TRACE symbol for MIPS
which is the de facto solution to turn userland exception logging
on and off via the /proc/sys/debug/exception-trace file.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9089/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Markos Chandras 2015-01-21 10:54:46 +00:00 • committed by Ralf Baechle

parent 9791554b45

commit d79d853df1

2 changed files with 21 additions and 9 deletions

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arch/mips/Kconfig

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29

arch/mips/mm/fault.c

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