[PATCH v7 3/8] kbuild: keep .modinfo section in vmlinux.unstripped

Alexey Gladkov
2025-08-18T16:58:05Z

From: Masahiro Yamada <masahiroy@kernel.org>

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>
---
include/asm-generic/vmlinux.lds.h | 2 +-
scripts/Makefile.vmlinux | 2 +-
scripts/mksysmap | 3 +++
3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index ae2d2359b79e9..cfa63860dfd4c 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -831,6 +831,7 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)

/* Required sections not related to debugging. */
#define ELF_DETAILS \
+ .modinfo : { *(.modinfo) } \
.comment 0 : { *(.comment) } \
.symtab 0 : { *(.symtab) } \
.strtab 0 : { *(.strtab) } \
@@ -1044,7 +1045,6 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
*(.discard.*) \
*(.export_symbol) \
*(.no_trim_symbol) \
- *(.modinfo) \
/* ld.bfd warns about .gnu.version* even when not emitted */ \
*(.gnu.version*) \

diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux
index 4f2d4c3fb7372..e2ceeb9e168d4 100644
--- a/scripts/Makefile.vmlinux
+++ b/scripts/Makefile.vmlinux
@@ -86,7 +86,7 @@ endif
# vmlinux
# ---------------------------------------------------------------------------

-remove-section-y :=
+remove-section-y := .modinfo
remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*'

quiet_cmd_strip_relocs = OBJCOPY $@
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 3accbdb269ac7..a607a0059d119 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -79,6 +79,9 @@
/ _SDA_BASE_$/d
/ _SDA2_BASE_$/d

+# MODULE_INFO()
+/ __UNIQUE_ID_modinfo[0-9]*$/d
+
# ---------------------------------------------------------------------------
# Ignored patterns
# (symbols that contain the pattern are ignored)
--
2.50.1