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-rwxr-xr-xscripts/objdump-func45
1 files changed, 45 insertions, 0 deletions
diff --git a/scripts/objdump-func b/scripts/objdump-func
new file mode 100755
index 0000000000..7b15b873d0
--- /dev/null
+++ b/scripts/objdump-func
@@ -0,0 +1,45 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Disassemble a single function.
+#
+# usage: objdump-func <file> <func> [<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> [<func> ...]" >&2
+ exit 1
+}
+
+[[ $# -lt 2 ]] && usage
+
+OBJ=$1; shift
+FUNCS=("$@")
+
+${OBJDUMP} -wdr $OBJ | gawk -M -v _funcs="${FUNCS[*]}" '
+ BEGIN { split(_funcs, funcs); }
+ /^$/ { func_match=0; }
+ /<.*>:/ {
+ f = gensub(/.*<(.*)>:/, "\\1", 1);
+ for (i in funcs) {
+ # match compiler-added suffixes like ".cold", etc
+ if (f ~ "^" funcs[i] "(\\..*)?") {
+ func_match = 1;
+ base = strtonum("0x" $1);
+ break;
+ }
+ }
+ }
+ {
+ if (func_match) {
+ addr = strtonum("0x" $1);
+ printf("%04x ", addr - base);
+ print;
+ }
+ }'