pahole, which generates BTF, relies on elfutils to process DWARF debug info. Because kernel modules are relocatable files, elfutils needs to resolve relocations when processing the DWARF .debug sections. Hexagon is not supported in binutils or elfutils, so elfutils is unable to process relocations in kernel modules, causing pahole to crash during BTF generation. Do not allow CONFIG_DEBUG_INFO_BTF to be selected for Hexagon until it is supported in elfutils, so that there are no more cryptic build failures during BTF generation. Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202312192107.wMIKiZWw-lkp@xxxxxxxxx/ Suggested-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Acked-by: Brian Cain <bcain@xxxxxxxxxxx> Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx> --- lib/Kconfig.debug | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 4405f81248fb..1b939f5583eb 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -378,6 +378,8 @@ config DEBUG_INFO_BTF depends on !GCC_PLUGIN_RANDSTRUCT || COMPILE_TEST depends on BPF_SYSCALL depends on !DEBUG_INFO_DWARF5 || PAHOLE_VERSION >= 121 + # pahole uses elfutils, which does not have support for Hexagon relocations + depends on !HEXAGON help Generate deduplicated BTF type information from DWARF debug info. Turning this on expects presence of pahole tool, which will convert --- base-commit: 610a9b8f49fbcf1100716370d3b5f6f884a2835a change-id: 20240105-hexagon-disable-btf-1ee7cab7d5f8 Best regards, -- Nathan Chancellor <nathan@xxxxxxxxxx>
