| Josh Poimboeuf | 21e3502 | 2022-04-21 14:56:55 -0700 | [diff] [blame^] | 1 | #!/bin/bash |
| 2 | # SPDX-License-Identifier: GPL-2.0 |
| 3 | # |
| 4 | # Disassemble a single function. |
| 5 | # |
| 6 | # usage: objdump-func <file> <func> |
| 7 | |
| 8 | set -o errexit |
| 9 | set -o nounset |
| 10 | |
| 11 | OBJDUMP="${CROSS_COMPILE:-}objdump" |
| 12 | |
| 13 | command -v gawk >/dev/null 2>&1 || die "gawk isn't installed" |
| 14 | |
| 15 | usage() { |
| 16 | echo "usage: objdump-func <file> <func>" >&2 |
| 17 | exit 1 |
| 18 | } |
| 19 | |
| 20 | [[ $# -lt 2 ]] && usage |
| 21 | |
| 22 | OBJ=$1; shift |
| 23 | FUNC=$1; shift |
| 24 | |
| 25 | # Secret feature to allow adding extra objdump args at the end |
| 26 | EXTRA_ARGS=$@ |
| 27 | |
| 28 | # Note this also matches compiler-added suffixes like ".cold", etc |
| 29 | ${OBJDUMP} -wdr $EXTRA_ARGS $OBJ | gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f "(\\..*)?>:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }' |
