Messages in this thread Patch in this message | | | From | Josh Poimboeuf <> | Subject | [PATCH v3] scripts: Create objdump-func helper script | Date | Wed, 20 Apr 2022 10:16:36 -0700 |
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Add a simple script which disassembles a single function from an object file. Comes in handy for objtool warnings and kernel stack traces.
Originally-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> --- v3: - Add usage - Fix vmlinux
scripts/objdump-func | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100755 scripts/objdump-func
diff --git a/scripts/objdump-func b/scripts/objdump-func new file mode 100755 index 000000000000..0908f9f616c3 --- /dev/null +++ b/scripts/objdump-func @@ -0,0 +1,25 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Disassemble a single function. +# +# usage: objdump-func <file> <func> + +set -o errexit +set -o nounset + +OBJDUMP="${CROSS_COMPILE:-}objdump" + +command -v gawk >/dev/null 2>&1 || die "gawk isn't installed" + +usage() { + echo "usage: objdump-func <file> <func>" >&2 + exit 1 +} + +[[ $# -ne 2 ]] && usage + +OBJ=$1; shift +FUNC=$1; shift + +${OBJDUMP} -wdr $OBJ | gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f ">:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }' -- 2.34.1
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