diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.btf | 7 | ||||
| -rwxr-xr-x | scripts/gen-btf.sh | 31 | ||||
| -rwxr-xr-x | scripts/link-vmlinux.sh | 8 | ||||
| -rw-r--r-- | scripts/package/kernel.spec | 10 |
4 files changed, 48 insertions, 8 deletions
diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf index a1812985a61a..98012344a81e 100644 --- a/scripts/Makefile.btf +++ b/scripts/Makefile.btf @@ -22,7 +22,14 @@ endif pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE) += --lang_exclude=rust +btf-inline := $(CONFIG_DEBUG_INFO_BTF_INLINE) +ifneq ($(btf-inline),) +btf-inline-feat := inline +pahole-flags-$(call test-ge, $(pahole-ver), 132) += --btf_features=$(btf-inline-feat) +endif + export PAHOLE_FLAGS := $(pahole-flags-y) +export BTF_INLINE := $(btf-inline) resolve-btfids-flags-y := resolve-btfids-flags-$(CONFIG_WERROR) += --fatal_warnings diff --git a/scripts/gen-btf.sh b/scripts/gen-btf.sh index 8ca96eb10a69..b17f1189298a 100755 --- a/scripts/gen-btf.sh +++ b/scripts/gen-btf.sh @@ -68,6 +68,7 @@ esac gen_btf_data() { + inline=${BTF_INLINE:+--inline} btf1="${ELF_FILE}.BTF.1" ${PAHOLE} -J ${PAHOLE_FLAGS} \ ${BTF_BASE:+--btf_base ${BTF_BASE}} \ @@ -76,6 +77,7 @@ gen_btf_data() ${RESOLVE_BTFIDS} ${RESOLVE_BTFIDS_FLAGS} \ ${BTF_BASE:+--btf_base ${BTF_BASE}} \ + ${inline} \ --btf ${btf1} "${ELF_FILE}" } @@ -83,14 +85,28 @@ gen_btf_o() { btf_data=${ELF_FILE}.btf.o - # Create ${btf_data} which contains just .BTF section but no symbols. Add + # Create ${btf_data} which contains just BTF sections but no symbols. Add # SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all # deletes all symbols including __start_BTF and __stop_BTF, which will # be redefined in the linker script. echo "" | ${CC} ${CLANG_FLAGS} ${KBUILD_CPPFLAGS} ${KBUILD_CFLAGS} -fno-lto -c -x c -o ${btf_data} - ${OBJCOPY} --add-section .BTF=${ELF_FILE}.BTF \ --set-section-flags .BTF=alloc,readonly ${btf_data} - ${OBJCOPY} --only-section=.BTF --strip-all ${btf_data} + ONLY_SEC="--only-section=.BTF" + btf_inline=${ELF_FILE}.BTF.inline + if [ "${BTF_INLINE}" = "m" ]; then + if [ -f "${btf_inline}" ]; then + cp "${btf_inline}" "${objtree}/vmlinux.BTF.inline" + else + rm -f "${objtree}/vmlinux.BTF.inline" + fi + fi + if [ "${BTF_INLINE}" = "y" ] && [ -f "${btf_inline}" ]; then + ${OBJCOPY} --add-section .BTF.inline=${btf_inline} \ + --set-section-flags .BTF.inline=alloc,readonly ${btf_data} + ONLY_SEC="${ONLY_SEC} --only-section=.BTF.inline" + fi + ${OBJCOPY} ${ONLY_SEC} --strip-all ${btf_data} # Change e_type to ET_REL so that it can be used to link final vmlinux. # GNU ld 2.35+ and lld do not allow an ET_EXEC input. @@ -111,6 +127,15 @@ embed_btf_data() if [ -f "${btf_base}" ]; then ${OBJCOPY} --add-section .BTF.base=${btf_base} ${ELF_FILE} fi + btf_inline=${ELF_FILE}.BTF.inline + case "${ELF_FILE}" in + */btf_vmlinux_inline.ko) + btf_inline=${BTF_BASE}.BTF.inline + ;; + esac + if [ -n "${BTF_INLINE}" ] && [ -f "${btf_inline}" ]; then + ${OBJCOPY} --add-section .BTF.inline=${btf_inline} ${ELF_FILE} + fi btf_ids="${ELF_FILE}.BTF_ids" if [ -f "${btf_ids}" ]; then ${RESOLVE_BTFIDS} --patch_btfids ${btf_ids} ${ELF_FILE} @@ -121,6 +146,8 @@ cleanup() { rm -f "${ELF_FILE}.BTF.1" rm -f "${ELF_FILE}.BTF" + rm -f "${ELF_FILE}.BTF.inline" + rm -f "${ELF_FILE}.BTF.inline.link" if [ "${BTFGEN_MODE}" = "module" ]; then rm -f "${ELF_FILE}.BTF.base" rm -f "${ELF_FILE}.BTF_ids" diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index ab0b8125c8cb..5424caf5135b 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -289,7 +289,13 @@ vmlinux_link "${VMLINUX}" if is_enabled CONFIG_DEBUG_INFO_BTF; then info BTFIDS ${VMLINUX} - ${RESOLVE_BTFIDS} --patch_btfids ${btfids_vmlinux} ${VMLINUX} + if [ "${BTF_INLINE}" = "m" ]; then + ${RESOLVE_BTFIDS} --patch_btfids ${btfids_vmlinux} \ + --btf_link .BTF.inline:btf_vmlinux_inline:vmlinux.BTF.inline \ + ${VMLINUX} + else + ${RESOLVE_BTFIDS} --patch_btfids ${btfids_vmlinux} ${VMLINUX} + fi fi mksysmap "${VMLINUX}" System.map diff --git a/scripts/package/kernel.spec b/scripts/package/kernel.spec index 46e80970f723..8f0933cbbe45 100644 --- a/scripts/package/kernel.spec +++ b/scripts/package/kernel.spec @@ -68,13 +68,13 @@ This package provides debug information for the kernel image and modules from th %undefine _debugsource_packages %undefine _debuginfo_subpackages -# Preserve .BTF and .BTF.base sections in kernel modules during debuginfo -# stripping. find-debuginfo.sh uses eu-strip which removes non-allocated ELF -# sections like .BTF by default. .BTF.base is required for BTF distillation -# support; without it, module BTF validation fails. +# Preserve .BTF, .BTF.base and .BTF.inline sections in kernel modules during +# debuginfo stripping. find-debuginfo.sh uses eu-strip which removes +# non-allocated ELF sections like .BTF by default. .BTF.base is required for +# BTF distillation support; without it, module BTF validation fails. %global with_keep_section %(%{__find_debuginfo} --help 2>&1 | grep -c keep-section) %if %{with_keep_section} -%global _find_debuginfo_opts -r --keep-section .BTF --keep-section .BTF.base +%global _find_debuginfo_opts -r --keep-section .BTF --keep-section .BTF.base --keep-section .BTF.inline %else %global _find_debuginfo_opts -r %endif |