[PATCH 0/12] arm: Enables return address verification and branch target identification on Cortex-M

[Andrea Corallo via Gcc-patches]

Hi all,

this series enables return address verification and branch target
identification based on Armv8.1-M Pointer Authentication and Branch
Target Identification Extension [1] for Arm Cortex-M.

This feature is controlled by the newly introduced '-mbranch-protection'
option, contextually the Armv8.1-M Mainline target feature '+pacbti' is
added.

Best Regards

  Andrea

[1] 
<https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension>