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| author | Martin Rodriguez Reboredo <yakoyoku@gmail.com> | 2023-01-11 18:20:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-20 13:50:10 +0300 |
| commit | 0d242f739cecfbafd1ee4798c9a5bc1362b28a31 (patch) | |
| tree | fdcc75ccf512b7a8a388227ee9a1df5c89c1bf9f | |
| parent | b9765932199ef0400c9a13ba2feba87bc3f6ed3e (diff) | |
| download | linux-0d242f739cecfbafd1ee4798c9a5bc1362b28a31.tar.xz | |
btf, scripts: Exclude Rust CUs with pahole
commit c1177979af9c616661a126a80dd486ad0543b836 upstream.
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 <ecurtin@redhat.com>
Signed-off-by: Eric Curtin <ecurtin@redhat.com>
Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | init/Kconfig | 2 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 9 | ||||
| -rwxr-xr-x | scripts/pahole-flags.sh | 4 |
3 files changed, 14 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index de255842f5d0..148704640252 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1914,7 +1914,7 @@ config RUST depends on !MODVERSIONS depends on !GCC_PLUGINS depends on !RANDSTRUCT - depends on !DEBUG_INFO_BTF + depends on !DEBUG_INFO_BTF || PAHOLE_HAS_LANG_EXCLUDE select CONSTRUCTORS help Enables Rust support in the kernel. diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 4db0199651f5..95541b99aa8e 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -364,6 +364,15 @@ 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 diff --git a/scripts/pahole-flags.sh b/scripts/pahole-flags.sh index 0d99ef17e4a5..1f1f1d397c39 100755 --- a/scripts/pahole-flags.sh +++ b/scripts/pahole-flags.sh @@ -19,5 +19,9 @@ fi if [ "${pahole_ver}" -ge "122" ]; then extra_paholeopt="${extra_paholeopt} -j" fi +if [ "${pahole_ver}" -ge "124" ]; then + # see PAHOLE_HAS_LANG_EXCLUDE + extra_paholeopt="${extra_paholeopt} --lang_exclude=rust" +fi echo ${extra_paholeopt} |