Enabling PAC and BTI on AArch64 for Linux
Source code for the examples can be found at https://gitlab.arm.com/pac-and-bti-blog/blog-example and the tag will be referenced with the "Tag" keyword before source examples. Certain versions of Arm 64-bit processors have features that can help provide control flow integrity and reduce gadget space, making software more robust in the face of attack. Pointer Authentication Codes (PAC) work by signing and verifying indirect branch targets and branch target instructions (BTI) function by marking all valid branch locations. These technologies harden the control flow by ensuring that modification of control flow…