diff --git a/work/dot/.gitignore b/work/dot/.gitignore
new file mode 100644
index 0000000..a136337
--- /dev/null
+++ b/work/dot/.gitignore
@@ -0,0 +1 @@
+*.pdf
diff --git a/work/dot/Makefile b/work/dot/Makefile
new file mode 100644
index 0000000..170f4fc
--- /dev/null
+++ b/work/dot/Makefile
@@ -0,0 +1,12 @@
+.PHONY: clean build
+
+DOT = $(wildcard *.dot)
+PDF = $(DOT:.dot=.pdf)
+
+build: $(PDF)
+
+%.pdf: %.dot
+	dot -Tpdf $< -o $@
+
+clean:
+	rm -f $(PDF)
diff --git a/work/dot/before.dot b/work/dot/before.dot
new file mode 100644
index 0000000..63b3926
--- /dev/null
+++ b/work/dot/before.dot
@@ -0,0 +1,10 @@
+digraph G {
+  parent [
+    shape="plaintext"
+    label=<
+      <table border='1' cellborder='1'>
+        <tr><td>data1</td><td>0xFE</td><td>&lt;- SP</td></tr>
+        <tr><td>data1</td><td>0xFF</td><td>&lt;- BP</td></tr>
+      </table>
+  >];
+}
diff --git a/work/dot/call.dot b/work/dot/call.dot
new file mode 100644
index 0000000..5ddb455
--- /dev/null
+++ b/work/dot/call.dot
@@ -0,0 +1,15 @@
+digraph G {
+  parent [
+    shape="plaintext"
+    label=<
+      <table border='1' cellborder='1'>
+        <tr><td>data2</td><td>0xF9</td><td>&lt;- SP</td></tr>
+        <tr><td>data2</td><td>0xFA</td><td>&lt;- BP</td></tr>
+        <tr><td>[old IP]</td><td>0xFB</td><td></td></tr>
+        <tr><td>*0xFE</td><td>0xFC</td><td></td></tr>
+        <tr><td>*0xFF</td><td>0xFD</td><td></td></tr>
+        <tr><td>data1</td><td>0xFE</td><td></td></tr>
+        <tr><td>data1</td><td>0xFF</td><td></td></tr>
+      </table>
+  >];
+}
diff --git a/work/dot/exploit.dot b/work/dot/exploit.dot
new file mode 100644
index 0000000..6e9eb18
--- /dev/null
+++ b/work/dot/exploit.dot
@@ -0,0 +1,15 @@
+digraph G {
+  parent [
+    shape="plaintext"
+    label=<
+      <table border='1' cellborder='1'>
+        <tr><td>data2</td><td>0xF9</td><td>&lt;- SP</td></tr>
+        <tr><td>[payload]</td><td>0xFA</td><td>&lt;- BP</td></tr>
+        <tr><td>[controlled IP]</td><td>0xFB</td><td></td></tr>
+        <tr><td>*0xFE</td><td>0xFC</td><td></td></tr>
+        <tr><td>*0xFF</td><td>0xFD</td><td></td></tr>
+        <tr><td>data1</td><td>0xFE</td><td></td></tr>
+        <tr><td>data1</td><td>0xFF</td><td></td></tr>
+      </table>
+  >];
+}