On Sun, Jul 10, 2022 at 10:57:01PM -0700, Donald Chan wrote: > Hi, > > I am trying to enable CONFIG_DEBUG_INFO_BTF when building a > Yocto-based Linux kernel....but it is failing with this error: > > | LD .tmp_vmlinux.btf > | BTF .btf.vmlinux.bin.o > | LD .tmp_vmlinux.kallsyms1 > | KSYMS .tmp_vmlinux.kallsyms1.S > | AS .tmp_vmlinux.kallsyms1.S > | LD .tmp_vmlinux.kallsyms2 > | KSYMS .tmp_vmlinux.kallsyms2.S > | AS .tmp_vmlinux.kallsyms2.S > | LD vmlinux > | BTFIDS vmlinux > | FAILED: load BTF from vmlinux: No such file or directory > > I dug deeper and it seems that the resolve_btfids utility is not able > to find any relevant .BTF section (at btf__parse from function > symbols_resolve). > > Dumped the vmlinux and also confirmed there is only .BTF_ids section: > > [2993] .rela___ksymtab_g RELA 0000000000000000 17174de0 > 0000000000000048 0000000000000018 I 22807 2992 8 > [2994] .BTF_ids PROGBITS 0000000000000000 0105c504 > 00000000000000fc 0000000000000000 A 0 0 1 > > What could be wrong? Sample config is available at > https://gist.github.com/hoiho-amzn/964eb0cf2b4459f6775d7af1da7b4056 > > The issue exists on x86_64, I also have tried armv7 with the same > result so doesn't seem to be arch-specific. hi, do you use any special command line options? what tree/branch are you on? thanks, jirka > > Thanks > Donald
