Re: gcc: Thumb interworking and weakly linked functions

On Thursday 23 February 2012 07:26 PM, Richard Earnshaw wrote:

On 23/02/12 10:27, Aneesh V wrote:

...

Ok. Agree. I never used to use %function when I wrote assembly functions earlier. I am sure a lot of code will break if this was enforced.

If you've not used %function on ARM, then your code is semantically broken even if it isn't syntactically broken.

The ABI rules for dealing with interworking and and out-of-range branches all rely on %function being used correctly.

Hmm.. I learned it the hard way:)

BTW, very few assembly functions in U-Boot had %function or equivalent. I am trying to clean it up at least for armv7.

Thanks, Aneesh