Explore intra-process memory protection techniques for ARM and x86 architectures using the ELF ABI. Delve into the challenges of isolating components within a process and learn about ELFbac, a system that leverages the Linux ELF ABI to express and enforce access control policies between program components. Discover how this approach requires no changes to the GNU build chain and operates at the level of ELF object file sections. Examine prototypes for ARM and x86, including practical applications in protecting a validating proxy firewall for DNP3 and implementing a basic policy for Nginx. Gain insights into the implementation details, performance considerations, and potential impact on software security through demonstrations and in-depth explanations of the ELFbac system.