Add flag to enable Dwarf exception handling on ARM
Previously EABI EH was disabled for NaCl but not explicitly disabled for
Non-SFI mode. Some changes upstream for better ARM EHABI support caused
EHABI unwind info to be unconditionally emitted (into the .ARM.exidx section)
which has references to aeabi_ functions which we do not include in our
compiler-rt.
Introduce a flag to fully disable EHABI support for ARM (to be used by
Non-SFI mode) and clean up the disabling of EHABI for SFI mode as well.
R=jfb@chromium.org, mseaborn@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3930
Review URL: https://codereview.chromium.org/738143002
4 files changed
