ARM: kprobes-test: Workaround GAS .align bugtracking-be_arm-ll-20140416.0tracking-be_arm-ll-20140415.0tracking-be_arm-ll-20140411.1tracking-be_arm-ll-20140411.0tracking-be_arm-ll-20140409.0tracking-be_arm-ll-20140407.0tracking-be_arm-ll-20140406.0tracking-be_arm-ll-20140401.0tracking-be_arm-ll-20140321.0tracking-be_arm-ll-20140319.0tracking-be_arm-ll-20140317.0tracking-be_arm-ll-20140314.0tracking-be_arm-ll-20140311.0tracking-be_arm-ll-20140306.0tracking-be_arm-ll-20140304.0tracking-be_arm-ll-20140228.0tracking-be_arm-ll-20140218.0tracking-be_arm-ll-20140217.0tracking-be_arm-ll-20140216.0tracking-be_arm-ll-20140213.0

By default if no fill symbol is given to .align directive in a code
section it fills gap with NOPs. If previous fragment is not
instruction-aligned, additional pre-alignment is done by zero bytes
before NOPs. These zero bytes are marked as data by special symbol $d in
symbol table. Unfortunately GAS assumes that there is only code in the
code section so it "puts back" code symbol $a at the end of this
pre-alignment. So if there is some data after alignment it will be
interpreted as code and will be swapped back to LE for BE8 system during
a final linking.

If explicit fill value is given to .align, the NOP-padding code is
skipped and symbol table does not get messed-up.

So the workaround for this issue:
Use explicit fill value if data should be aligned in the code section.

Acked-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>

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