The compiler supplied in Sourcery CodeBench Lite emits TLS Descriptor
sequences to access thread-local storage in position-independent
code. This is a new TLS access model, with a specification at
http://sourcery.mentor.com/public/publications/RFC-TLSDESC-ARM.txt.
It improves the performance of shared objects and
position-independent executables. This model requires dynamic
loader support. The loader included with Sourcery CodeBench Lite includes the
necessary support. Support for the older ARM EABI-specified
access sequence is still provided and thus object files and
executables built by EABI-compliant toolchains, including
earlier versions of Sourcery CodeBench Lite, will continue to function. If
you need to use an older dynamic loader that lacks TLS
Descriptor support, you must compile all your code with
-mtls-dialect=gnu
. This option selects the
previous TLS access method.