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-rwxr-xr-xscripts/link-vmlinux.sh37
1 files changed, 22 insertions, 15 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index f742c65108b9..c80291319cb2 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -209,15 +209,6 @@ case "${KCONFIG_CONFIG}" in
. "./${KCONFIG_CONFIG}"
esac
-archive_builtin
-
-#link vmlinux.o
-info LD vmlinux.o
-modpost_link vmlinux.o
-
-# modpost vmlinux.o to check for section mismatches
-${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
-
# Update version
info GEN .version
if [ ! -r .version ]; then
@@ -231,6 +222,15 @@ fi;
# final build of init/
${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}"
+archive_builtin
+
+#link vmlinux.o
+info LD vmlinux.o
+modpost_link vmlinux.o
+
+# modpost vmlinux.o to check for section mismatches
+${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
+
kallsymso=""
kallsyms_vmlinux=""
if [ -n "${CONFIG_KALLSYMS}" ]; then
@@ -246,10 +246,14 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
# the right size, but due to the added section, some
# addresses have shifted.
# From here, we generate a correct .tmp_kallsyms2.o
- # 2a) We may use an extra pass as this has been necessary to
- # woraround some alignment related bugs.
- # KALLSYMS_EXTRA_PASS=1 is used to trigger this.
- # 3) The correct ${kallsymso} is linked into the final vmlinux.
+ # 3) That link may have expanded the kernel image enough that
+ # more linker branch stubs / trampolines had to be added, which
+ # introduces new names, which further expands kallsyms. Do another
+ # pass if that is the case. In theory it's possible this results
+ # in even more stubs, but unlikely.
+ # KALLSYMS_EXTRA_PASS=1 may also used to debug or work around
+ # other bugs.
+ # 4) The correct ${kallsymso} is linked into the final vmlinux.
#
# a) Verify that the System.map from vmlinux matches the map from
# ${kallsymso}.
@@ -265,8 +269,11 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
- # step 2a
- if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
+ # step 3
+ size1=$(stat -c "%s" .tmp_kallsyms1.o)
+ size2=$(stat -c "%s" .tmp_kallsyms2.o)
+
+ if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
kallsymso=.tmp_kallsyms3.o
kallsyms_vmlinux=.tmp_vmlinux3