linux-kernel - [RFC PATCH v2 2/3] kbuild: Sort ORC unwind tables in vmlinux link phase

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Date:   Fri,  8 Nov 2019 15:11:07 +0800
From:   shile.zhang@...ux.alibaba.com
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org
Cc:     "H . Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org,
        Shile Zhang <shile.zhang@...ux.alibaba.com>
Subject: [RFC PATCH v2 2/3] kbuild: Sort ORC unwind tables in vmlinux link phase

From: Shile Zhang <shile.zhang@...ux.alibaba.com>

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

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

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
 
-- 
2.24.0.rc2