[Bug 801727]

[Dave Martin]

Created attachment 5824
possible fix

The attached patch hooks into mapping_state() to mark the alignment
requirement on the current output section whenever we start emitting
instructions.

It might be safer to make the alignment 4 for Thumb code as well as ARM
code; the current patch gives Thumb code an alignment of 2 bytes, based
on the principles that (a) this makes the current situation no worse,
and (b) all realistic situations where a Thumb code section requires
4-byte alignment will involve an explicit .align or literal pool
somewhere, so we don't need to worry.

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https://bugs.launchpad.net/bugs/801727

Title:
  ARM: gas fails to set the proper alignment on code sections, causing
  broken output

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