1 files changed, 31 insertions, 0 deletions
diff --git a/build_helpers/splicetobootsect.sh b/build_helpers/splicetobootsect.sh
new file mode 100755
index 0000000..ac4ca0d
--- /dev/null
+++ b/build_helpers/splicetobootsect.sh
@@ -0,0 +1,31 @@
+#! /bin/bash
+set -u
+set -e
+
+if [ -z "$1" ] || [ ! -f "$1" ]; then
+  echo "Argument must be the path to a binary to splice into a bootsector"
+  exit 1
+fi
+
+INSIZE=$(stat -c%s $1)
+if [ $INSIZE -ge 510 ]; then
+  echo "Input file is greater than bootsector max size (510 bytes)"
+  exit 1
+fi
+
+OUTFILE="bootable.img"
+echo -n "[*] Creating bootsector template... "
+dd if=/dev/zero bs=510 count=1 of="$OUTFILE" >/dev/null 2>&1
+echo -ne "\x55\xaa" >> "$OUTFILE"
+dd if=/dev/zero bs=512 count=255 ibs=512 seek=1 of="$OUTFILE" >/dev/null 2>&1
+echo " OK!"
+
+echo -n "[*] Inserting bootsector... "
+dd if="$1" of="$OUTFILE" conv=notrunc >/dev/null 2>&1
+echo " OK!"
+
+echo -n "[*] Inserting kernel... "
+dd if="bin/src._kernel._main.bin" of="$OUTFILE" conv=notrunc ibs=512 seek=1 >/dev/null 2>&1
+echo " OK!"
+echo "Done. File at:"
+echo "$OUTFILE"