linux-kernel - [PATCH v1 7/7] kbuild: Create modules.builtin.modinfo for modpost results

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Message-ID: <16dc06bb9edc122a2067a882701f5257d9c5d4e0.1745591072.git.legion@kernel.org>
Date: Sat, 26 Apr 2025 18:16:38 +0200
From: Alexey Gladkov <legion@...nel.org>
To: Luis Chamberlain <mcgrof@...nel.org>,
	Petr Pavlu <petr.pavlu@...e.com>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Daniel Gomez <da.gomez@...sung.com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas.schier@...ux.dev>
Cc: linux-kernel@...r.kernel.org,
	linux-modules@...r.kernel.org,
	linux-kbuild@...r.kernel.org,
	Alexey Gladkov <legion@...nel.org>
Subject: [PATCH v1 7/7] kbuild: Create modules.builtin.modinfo for modpost results

Create modules.builtin.modinfo as a combination of modinfo from vmlinux
and the result of generating modalias by modpost.

Signed-off-by: Alexey Gladkov <legion@...nel.org>
---
 scripts/Makefile.vmlinux | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux
index 033c22c807b5..7a3a21040c4c 100644
--- a/scripts/Makefile.vmlinux
+++ b/scripts/Makefile.vmlinux
@@ -70,6 +70,18 @@ endif
 ifdef CONFIG_MODULES
 targets += .vmlinux.export.o
 $(vmlinux-final): .vmlinux.export.o
+
+# .module.builtin.modinfo.modpost
+# ---------------------------------------------------------------------------
+__default: .modules.builtin.modinfo.modpost
+
+OBJCOPYFLAGS_.modules.builtin.modinfo.modpost := -j .modinfo -O binary
+
+targets += .modules.builtin.modinfo.modpost
+.modules.builtin.modinfo.modpost: .vmlinux.export.o FORCE
+	$(call if_changed,objcopy)
+
+modules.builtin.modinfo: .modules.builtin.modinfo.modpost
 endif
 
 ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX
@@ -97,15 +109,27 @@ ifdef CONFIG_BUILDTIME_TABLE_SORT
 vmlinux: scripts/sorttable
 endif
 
+# .module.builtin.modinfo.vmlinux
+# ---------------------------------------------------------------------------
+__default: .modules.builtin.modinfo.vmlinux
+
+OBJCOPYFLAGS_.modules.builtin.modinfo.vmlinux := -j .modinfo -O binary
+
+targets += .modules.builtin.modinfo.vmlinux
+.modules.builtin.modinfo.vmlinux: vmlinux.o FORCE
+	$(call if_changed,objcopy)
+
 # module.builtin.modinfo
 # ---------------------------------------------------------------------------
 __default: modules.builtin.modinfo
 
-OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
+quiet_cmd_modules_builtin_modinfo = GEN     $@
+      cmd_modules_builtin_modinfo = \
+	cat $< $(wildcard .modules.builtin.modinfo.modpost) > $@
 
 targets += modules.builtin.modinfo
-modules.builtin.modinfo: vmlinux.o FORCE
-	$(call if_changed,objcopy)
+modules.builtin.modinfo: .modules.builtin.modinfo.vmlinux FORCE
+	$(call if_changed,modules_builtin_modinfo)
 
 # module.builtin
 # ---------------------------------------------------------------------------
-- 
2.49.0