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kbuild: keep .modinfo section in vmlinux.unstripped

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Keep the .modinfo section during linking, but strip it from the final
vmlinux.

Adjust scripts/mksysmap to exclude modinfo symbols from kallsyms.

This change will allow the next commit to extract the .modinfo section
from the vmlinux.unstripped intermediate.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Alexey Gladkov <legion@kernel.org>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Link: https://patch.msgid.link/aaf67c07447215463300fccaa758904bac42f992.1758182101.git.legion@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
This commit is contained in:
Masahiro Yamada
2025-09-24 09:10:44 -07:00
committed by Nathan Chancellor
parent 0ce5139fd9
commit 3e86e4d74c
3 changed files with 9 additions and 3 deletions
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scripts/Makefile.vmlinux
+5 -2
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@@ -86,11 +86,14 @@ endif
# vmlinux
# ---------------------------------------------------------------------------
remove-section-y :=
remove-section-y := .modinfo
remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*'
# To avoid warnings: "empty loadable segment detected at ..." from GNU objcopy,
# it is necessary to remove the PT_LOAD flag from the segment.
quiet_cmd_strip_relocs = OBJCOPY $@
cmd_strip_relocs = $(OBJCOPY) $(addprefix --remove-section=,$(remove-section-y)) $< $@
cmd_strip_relocs = $(OBJCOPY) $(patsubst %,--set-section-flags %=noload,$(remove-section-y)) $< $@; \
$(OBJCOPY) $(addprefix --remove-section=,$(remove-section-y)) $@
targets += vmlinux
vmlinux: vmlinux.unstripped FORCE