On Wed, Dec 16, 2020 at 04:40:51PM -0800, Nick Desaulniers wrote: > With newer GNU binutils, linking with BFD produces warnings for vmlinux: > aarch64-linux-gnu-ld: warning: -z norelro ignored > > BFD can produce this warning when the target emulation mode does not > support RELRO relocation types, and -z relro or -z norelro is passed. > > Alan Modra clarifies: > The default linker emulation for an aarch64-linux ld.bfd is > -maarch64linux, the default for an aarch64-elf linker is > -maarch64elf. They are not equivalent. If you choose -maarch64elf > you get an emulation that doesn't support -z relro. > > The ARCH=arm64 kernel prefers -maarch64elf, but may fall back to > -maarch64linux based on the toolchain configuration. > > LLD will always create RELRO relocation types regardless of target > emulation. > > To avoid the above warning when linking with BFD, pass -z norelro only > when linking with LLD or with -maarch64linux. Given that, prior to 3b92fa7485eb, we used to pass '-z norelro' if CONFIG_RELOCATABLE then was this already broken with the ELF toolchain? Will
