Jens Wiklander

I prefer "Approach 2" as it keeps it simple without making any assumptions about the stack layout. Regarding performance I think either approach will beat the old burnstack approach.

Except that it still relies on undefined behavior.

Hi, I believe the question is answered in #3 Regards, Jens

Sorry, you compile it on the host machine.

Are you using latest from https://github.com/OP-TEE/optee_os?

It looks like you're using the host compiler instead of the cross compiler.

The `printf()` implementation doesn't support printing floating point types. Patches are welcome! :-)

No, there's no functions already available in OP-TEE for that (unless there's something under `lib/libutils/isoc/arch/arm/softfloat`, but that's not available for Aarch64).

Thanks. This project has been superseded by https://github.com/linaro-swg/hello_world, please create a pull request there if still applicable.