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[RFC,v2,2/3] kbuild: Sort ORC unwind tables in vmlinux link phase

Message ID 20191108071108.72132-3-shile.zhang@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series Speed booting by sorting ORC unwind tables at build time | expand

Commit Message

Shile Zhang Nov. 8, 2019, 7:11 a.m. UTC 
From: Shile Zhang <shile.zhang@linux.alibaba.com>

Sort the ORC unwind tables in vmlinux link phase, only for ORC unwinder.

Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com>
---
 scripts/link-vmlinux.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
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Patch

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 06495379fcd8..dea7797fcbdc 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -183,6 +183,11 @@  sortextable()
 	${objtree}/scripts/sortextable ${1}
 }
 
+sortorctable()
+{
+	${objtree}/scripts/sortorctable ${1}
+}
+
 # Delete output files in case of error
 cleanup()
 {
@@ -303,6 +308,15 @@  if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
 	sortextable vmlinux
 fi
 
+if [ -n "${CONFIG_UNWINDER_ORC}" ]; then
+	info SORTORC vmlinux
+	if ! sortorctable vmlinux; then
+		echo >&2 Failed to sort ORC unwind tables
+		echo >&2 Check what is wrong and try again
+		exit 1
+	fi
+fi
+
 info SYSMAP System.map
 mksysmap vmlinux System.map