From c1177979af9c616661a126a80dd486ad0543b836 Mon Sep 17 00:00:00 2001 From: Martin Rodriguez Reboredo Date: Wed, 11 Jan 2023 12:20:50 -0300 Subject: btf, scripts: Exclude Rust CUs with pahole Version 1.24 of pahole has the capability to exclude compilation units (CUs) of specific languages [1] [2]. Rust, as of writing, is not currently supported by pahole and if it's used with a build that has BTF debugging enabled it results in malformed kernel and module binaries [3]. So it's better for pahole to exclude Rust CUs until support for it arrives. Co-developed-by: Eric Curtin Signed-off-by: Eric Curtin Signed-off-by: Martin Rodriguez Reboredo Signed-off-by: Daniel Borkmann Tested-by: Eric Curtin Reviewed-by: Neal Gompa Acked-by: Miguel Ojeda Acked-by: Arnaldo Carvalho de Melo Link: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=49358dfe2aaae4e90b072332c3e324019826783f [1] Link: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=8ee363790b7437283c53090a85a9fec2f0b0fbc4 [2] Link: https://github.com/Rust-for-Linux/linux/issues/735 [3] Link: https://lore.kernel.org/bpf/20230111152050.559334-1-yakoyoku@gmail.com --- lib/Kconfig.debug | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 881c3f84e88a..335411ebaa1e 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -389,6 +389,15 @@ config PAHOLE_HAS_BTF_TAG btf_decl_tag) or not. Currently only clang compiler implements these attributes, so make the config depend on CC_IS_CLANG. +config PAHOLE_HAS_LANG_EXCLUDE + def_bool PAHOLE_VERSION >= 124 + help + Support for the --lang_exclude flag which makes pahole exclude + compilation units from the supplied language. Used in Kbuild to + omit Rust CUs which are not supported in version 1.24 of pahole, + otherwise it would emit malformed kernel and module binaries when + using DEBUG_INFO_BTF_MODULES. + config DEBUG_INFO_BTF_MODULES def_bool y depends on DEBUG_INFO_BTF && MODULES && PAHOLE_HAS_SPLIT_BTF -- cgit v1.2.3-70-g09d2