Hi,
(in context of testing BTI support when OP-TEE is loaded as a secure partition on top of SEL2/Hafnium)
I read through the OP-TEE documentation, and would like to confirm: CFG_CORE_BTI=y seems mandatorily required to support BTI in TAs. It means we cannot enable independently BTI for TAs and 'disable' for TEE core, is this correct?
Interestingly I noticed I can build with CFG_CORE_BTI=n and CTG_TA_BTI=y but I appreciate the end result is that the TA get BTI landpads but is not effectively leveraging the arch extension because code page aren't guarde if TEE core option isn't enabled.
I was investigating a way to omit building a specific toolchain as it appears to be required when CFG_CORE_BTI=y, but I'll go ahead if there's no way round. Out of curiosity is OP-TEE core pulling gcc libraries? And if yes, which kind? I naively thought OP-TEE core would be freestanding or be independent from toolchain libs.
Thanks & Regards, Olivier.