[RFC,1/4] Kbuild/link-vmlinux.sh: Make output file name configurable

Commit Message

Ard Biesheuvel Feb. 24, 2025, 1:21 p.m. UTC

From: Ard Biesheuvel <[e-mail]>

In order to introduce an intermediate, non-stripped vmlinux build that
can be used by other build steps as an input, pass the output file name
to link-vmlinux.sh via its command line.

Signed-off-by: Ard Biesheuvel <[e-mail]>
---
 scripts/Makefile.vmlinux |  2 +-
 scripts/link-vmlinux.sh  | 11 ++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

Patch

diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux
index 873caaa55313..3523ce3ce3dc 100644
--- a/scripts/Makefile.vmlinux
+++ b/scripts/Makefile.vmlinux
@@ -69,7 +69,7 @@  ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
 
 # Final link of vmlinux with optional arch pass after final link
 cmd_link_vmlinux =							\
-	$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";		\
+	$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)" "$@";	\
 	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
 
 targets += vmlinux
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 56a077d204cf..e55026128e05 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -31,6 +31,7 @@  set -e
 LD="$1"
 KBUILD_LDFLAGS="$2"
 LDFLAGS_vmlinux="$3"
+VMLINUX="$4"
 
 is_enabled() {
 	grep -q "^$1=y" include/config/auto.conf
@@ -278,7 +279,7 @@  fi
 
 strip_debug=
 
-vmlinux_link vmlinux
+vmlinux_link "${VMLINUX}"
 
 # fill in BTF IDs
 if is_enabled CONFIG_DEBUG_INFO_BTF; then
@@ -290,11 +291,11 @@  if is_enabled CONFIG_DEBUG_INFO_BTF; then
 	${RESOLVE_BTFIDS} ${RESOLVE_BTFIDS_ARGS} vmlinux
 fi
 
-mksysmap vmlinux System.map
+mksysmap "${VMLINUX}" System.map
 
 if is_enabled CONFIG_BUILDTIME_TABLE_SORT; then
-	info SORTTAB vmlinux
-	if ! sorttable vmlinux; then
+	info SORTTAB "${VMLINUX}"
+	if ! sorttable "${VMLINUX}"; then
 		echo >&2 Failed to sort kernel tables
 		exit 1
 	fi
@@ -310,4 +311,4 @@  if is_enabled CONFIG_KALLSYMS; then
 fi
 
 # For fixdep
-echo "vmlinux: $0" > .vmlinux.d
+echo "${VMLINUX}: $0" > ".${VMLINUX}.d"