tree 99db96f8cf6477e943084a4fb606f667ee284797
parent 468bc11ed059c475f974920ac3d499e6071a6b2c
author Rich Felker <dalias@aerifal.cx> 1398886331 -0400
committer Rich Felker <dalias@aerifal.cx> 1398886331 -0400

fix arm thread-pointer/atomic asm when compiling to thumb code

armv7/thumb2 provides a way to do atomics in thumb mode, but for armv6
we need a call to arm mode.

this commit is based on a patch by Stephen Thomas which fixed the
armv7 cases but not the armv6 ones.

all of this should be revisited if/when runtime selection of thread
pointer access and atomics are added.