mirror of
https://github.com/flatcar/scripts.git
synced 2025-10-20 03:41:02 +02:00
706cc0eb21
It is already possible to enable kernel config `CONFIG_DEBUG_INFO_BTF` using dwarves 1.18 included in the current Flatcar SDK, as long as its arch is amd64. However, Kernel build fails in case of arm64, when Kernel version is >= 5.9 and dwarves version is <= 1.18, like the following: ``` + pahole -J .tmp_vmlinux.btf PAHOLE: Error: Found symbol of zero size when encoding btf (sym: '__kvm_nvhe_arm64_ssbd_callback_required', cu: '../source/arch/arm64/kernel/cpu_errata.c'). PAHOLE: Error: Use '-j' or '--force' to ignore such symbols and force emit the btf. ../source/scripts/link-vmlinux.sh: line 141: 1929102 Segmentation fault ``` The bug was fixed via https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=2e719cca6672, ("btf_encoder: revamp how per-CPU variables are encoded"). The fix was first included in dwarves [1.19](https://git.kernel.org/pub/scm/devel/pahole/pahole.git/tag/?h=v1.19). Thus we need to get dwarves 1.19 included in Flatcar SDK, so that the next Alpha Kernels could have `CONFIG_DEBUG_INFO_BTF` enabled.