linux-kernel - [PATCH] scripts/decode_stacktrace.sh: prefix addr2line with $CROSS

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Message-Id: <20190109144756.24202-1-manut@linutronix.de>
Date:   Wed,  9 Jan 2019 15:47:56 +0100
From:   Manuel Traut <manut@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     sasha.levin@...cle.com, Manuel Traut <manut@...utronix.de>
Subject: [PATCH] scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE

At least for ARM64 kernels compiled with the crosstoolchain from
Debian/stretch or with the toolchain from kernel.org the line number is not
decoded correctly by 'decode_stacktrace.sh':

$ echo "[  136.513051]  f1+0x0/0xc [kcrash]" | \
  CROSS_COMPILE=/opt/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux- \
 ./scripts/decode_stacktrace.sh /scratch/linux-arm64/vmlinux \
                                /scratch/linux-arm64 \
                                /nfs/debian/lib/modules/4.20.0-devel
[  136.513051] f1 (/linux/drivers/staging/kcrash/kcrash.c:68) kcrash

If addr2line from the toolchain is used the decoded line number is correct:

[  136.513051] f1 (/linux/drivers/staging/kcrash/kcrash.c:57) kcrash

Signed-off-by: Manuel Traut <manut@...utronix.de>
---
 scripts/decode_stacktrace.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 64220e36ce3b..2f8c30b5c85b 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -66,7 +66,7 @@ parse_symbol() {
 	if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then
 		local code=${cache[$module,$address]}
 	else
-		local code=$(addr2line -i -e "$objfile" "$address")
+		local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address")
 		cache[$module,$address]=$code
 	fi
 
-- 
2.20.1