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authorMasahiro Yamada <masahiroy@kernel.org>2021-08-19 09:57:37 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2021-09-03 08:17:20 +0900
commit8f1305124ea48943d1dd07683ed4f82c69b232ee (patch)
treeedc931cae96df457c7af9a6d53f22436e4bab1a6
parenta8390ba9ddce15242a41ca04d097b75fd54fd63f (diff)
kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
When Clang LTO is enabled, vmlinux_link() reuses vmlinux.o instead of re-linking ${KBUILD_VMLINUX_OBJS} and ${KBUILD_VMLINUX_LIBS}. That is the only difference here, so merge the similar code. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>
-rwxr-xr-xscripts/link-vmlinux.sh30
1 files changed, 14 insertions, 16 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 36ef7b37fc5d..a6c4d0bce3ba 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -154,12 +154,23 @@ vmlinux_link()
local objects
local strip_debug
local map_option
+ local objs
+ local libs
info LD ${output}
# skip output file argument
shift
+ if [ -n "${CONFIG_LTO_CLANG}" ]; then
+ # Use vmlinux.o instead of performing the slow LTO link again.
+ objs=vmlinux.o
+ libs=
+ else
+ objs="${KBUILD_VMLINUX_OBJS}"
+ libs="${KBUILD_VMLINUX_LIBS}"
+ fi
+
# The kallsyms linking does not need debug symbols included.
if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then
strip_debug=-Wl,--strip-debug
@@ -170,22 +181,9 @@ vmlinux_link()
fi
if [ "${SRCARCH}" != "um" ]; then
- if [ -n "${CONFIG_LTO_CLANG}" ]; then
- # Use vmlinux.o instead of performing the slow LTO
- # link again.
- objects="--whole-archive \
- vmlinux.o \
- --no-whole-archive \
- ${@}"
- else
- objects="--whole-archive \
- ${KBUILD_VMLINUX_OBJS} \
- --no-whole-archive \
- --start-group \
- ${KBUILD_VMLINUX_LIBS} \
- --end-group \
- ${@}"
- fi
+ objects="--whole-archive ${objs} --no-whole-archive \
+ --start-group ${libs} --end-group \
+ $@"
${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} \
${strip_debug#-Wl,} \