1 files changed, 63 insertions, 0 deletions
diff --git a/build-aux/lint-bin b/build-aux/lint-bin
new file mode 100755
index 0000000..2fe8e4b
--- /dev/null
+++ b/build-aux/lint-bin
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+# build-aux/lint-bin - Lint final binary images
+#
+# Copyright (C) 2025  Luke T. Shumaker <lukeshu@lukeshu.com>
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -euE -o pipefail
+
+# Output is a series of lines in the format "symbol location size
+# source".  Whitespace may seem silly.
+objdump_globals() {
+	sed -E -n '/^ \.t?(data|bss)\./{ / 0x/{ p; D; }; N; s/\n/ /; p; }' <"$1"
+}
+
+lint_globals() {
+	local in_mapfile
+	in_mapfile=$1
+
+	local rel_base
+	rel_base=${in_mapfile#build/*/}
+	rel_base=${rel_base%/*}
+
+	local topdir
+	topdir=$PWD
+
+	{
+		echo 'Source Symbol Size'
+		objdump_globals "$in_mapfile" |
+			{
+				cd "$rel_base"
+				total=0
+				while read -r symbol addr size source; do
+					: "$addr"
+					case "$source" in
+						/*)
+							# libg.a(whatever.o) -> libg.a
+							source="${source%(*)}"
+							# resolve `..` components
+							source="$(realpath --canonicalize-missing --no-symlinks -- "$source")"
+							;;
+						CMakeFiles/*.dir/*.obj)
+							# CMakeFiles/sbc_harnes_objs.dir/...
+							source="${source#CMakeFiles/*.dir/}"
+							source="${source%.obj}"
+							source="${source//__/..}"
+							source="$(realpath --canonicalize-missing --no-symlinks --relative-to="$topdir" -- "$source")"
+							;;
+					esac
+					printf '%s %s 0x%04x\n' "$source" "$symbol" "$size"
+					total=$((total + size))
+				done
+				printf '~ Total 0x%04x\n' "$total"
+			} |
+			LC_COLLATE=C sort
+	} | column -t
+}
+
+main() {
+	echo 'Global variables:'
+	lint_globals 'build/rp2040-Release/cmd/sbc_harness/sbc_harness.elf.map' | sed 's/^/  /'
+}
+
+main "$@"