Register r9 in the ARM ABI
nisse at lysator.liu.se
Fri Mar 1 08:41:20 CET 2013
I have a general ARM question, that maybe Richard or someone else on the
list can answer.
>From the ABI documentation I've read, register r9 is in some way
reserved for implementation of things like thread local storage. If I
write a leaf function (not calling anybody else, and not using thread
local storage), can a use r9 like any other callee-save register or not?
The only potential problem case I see is if my function is interupted by
a signal, and the signal handler expects the value in register r9 to be
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