tree 3b78ab4bcb696d1deabcfe376c81e99730de4c9e
parent 3fd0ca63468f63b4e2fc7c2683facfa7c52a922b
author Curtis Millar <curtis.millar@data61.csiro.au> 1600650611 +1000
committer Curtis Millar <curtis.millar@data61.csiro.au> 1600650736 +1000

Force GCC to find new location of TLS base

GCC will sometimes optimise accesses to TLS across function calls
assuming that the TLS base address has not been changed and thus none of
the TLS variables have been relocated.

Given initialising musl libc explicitly creates a new TLS region,
updating __sel4_ipc_buffer requires us to force GCC to find its address
in the new TLS region rather than re-using the address it already
determined.

Signed-off-by: Curtis Millar <curtis.millar@data61.csiro.au>