Change Details

* Add elf_cpu_parse_dynamic() to allow MD code to do its own DYNAMIC parsing. Add stubs to all link_elf.c platforms. * Implement jump table relocation for ppc32 secure-plt LD_BIND_NOW style and add a check to ensure it is only loading secure-plt modules (using elf_cpu_parse_dynamic()) * Build kernel modules -fPIC on powerpc*. * Poison the powerpc32 runtime resolver to ensure any attempts to call it cause an appropriate panic instead of a branch-to-zero. Todo: * Figure out why dtrace is broken again. * Use elf_cpu_parse_dynamic() to make ppc64 module loading more robust.

Due to issues like https://reviews.llvm.org/D70570, clang's support for freestanding / static model code is still slightly lacking on ppc32. As such, I'm investigating building powerpc* kernel modules as PIC. * Add elf_cpu_parse_dynamic() to allow MD code to do its own DYNAMIC parsing. Add stubs to all link_elf.c platforms. * Implement jump table relocation for ppc32 secure-plt LD_BIND_NOW style and add a check to ensure it is only loading secure-plt modules (using elf_cpu_parse_dynamic()) * Build kernel modules -fPIC on powerpc*. * Poison the powerpc32 runtime resolver to ensure any attempts to call it cause an appropriate panic instead of a branch-to-zero. Todo: * Figure out why dtrace is broken again. * Use elf_cpu_parse_dynamic() to make ppc64 module loading more robust? * Document rationale behind this change

Due to issues like https://reviews.llvm.org/D70570, clang's support for freestanding / static model code is still slightly lacking on ppc32. As such, I'm investigating building powerpc* kernel modules as PIC. * Add elf_cpu_parse_dynamic() to allow MD code to do its own DYNAMIC parsing. Add stubs to all link_elf.c platforms. * Implement jump table relocation for ppc32 secure-plt LD_BIND_NOW style and add a check to ensure it is only loading secure-plt modules (using elf_cpu_parse_dynamic()) * Build kernel modules -fPIC on powerpc*. * Poison the powerpc32 runtime resolver to ensure any attempts to call it cause an appropriate panic instead of a branch-to-zero. Todo: * Figure out why dtrace is broken again. * Use elf_cpu_parse_dynamic() to make ppc64 module loading more robust.? * Document rationale behind this change