Provide a bash script to generate disasm tag files

tools/elf2tag

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+# Published under GNU General Public License, version 2 (GPL-2.0)
+# Copyright (C) 2007 Johannes Bauer <JohannesBauer@gmx.de>
+# Copyright (C) 2024 Small modifications by Stefan Rueger <stefan.rueger@urclocks.com>
+
+progname=$(basename "$0")
+if [ "$1" == "" ]; then
+cat <<END
+Syntax: $progname <file>.elf
+Function: output a tag file suitable for the terminal disasm -t=<tagfile> command
+Options: none
+END
+exit 1
+fi
+
+echo "# Automatically generated tagfile via ${progname} ${1}"
+avr-objdump -d "$1" | grep '<.*>:' | awk '{
+  ADDR = strtonum("0x" $1);
+  printf("0x%04x L     %s\n", ADDR, substr($2, 2, length($2) - 3));
+}'
+echo
+avr-nm "$1" | grep '^0080' | sort | grep -Ev '_(_bss_start|_data_end|_data_start|_bss_end|edata|DATA_REGION_ORIGIN)' | awk '
+{
+  ADDR = strtonum("0x" $1) - strtonum("0x800000");
+  if (LAST != "") {
+    STARTADDR = LAST;
+    ENDADDR = ADDR - 1;
+    SYMBOL = LASTSYM;
+    SIZE = ENDADDR - STARTADDR + 1;
+    if (SIZE == 1) {
+      printf("0x%04x M B 1 %s\n", STARTADDR, SYMBOL);
+    } else if (SIZE == 2) {
+      printf("0x%04x M W 1 %s\n", STARTADDR, SYMBOL);
+    } else {
+      printf("0x%04x M B %d %s\n", STARTADDR, SIZE, SYMBOL);
+    }
+
+  }
+  LAST = ADDR;
+  LASTSYM = $3;
+}'