4 files changed, 35 insertions, 0 deletions
diff --git a/C/HF/chap8/Makefile b/C/HF/chap8/Makefile
index df3283e..8377c1b 100644
--- a/C/HF/chap8/Makefile
+++ b/C/HF/chap8/Makefile
@@ -13,3 +13,27 @@ bin/libs/xor.o: $(INCLUDE_DIR)/libs/xor.h src/libs/xor.c
 
 bin/libs/encrypt.o: $(INCLUDE_DIR)/libs/encrypt.h src/libs/encrypt.c
 	cc -I $(INCLUDE_DIR) -c src/libs/encrypt.c -o bin/libs/encrypt.o
+
+# Create DSO and PIC versions
+#
+ecatS: bin/libs/libencrypt.a
+	cc -I $(INCLUDE_DIR) -L bin/libs -o bin/ecats src/ecat.c -lencrypts
+
+bin/libs/libencrypts.so: bin/libs/xor-pic.o bin/libs/encrypt-pic.o
+	cc -I $(INCLUDE_DIR) -shared -o bin/libs/libencrypts.so bin/libs/xor-pic.o bin/libs/encrypt-pic.o
+
+# This creates the same lib with a broken encrypt_arr call.
+# We can run the same program passing the different lib at runtime
+# and change the behavior of encrypt_arr at runtime
+bin/broken_libs/libencrypts.so: bin/libs/xor-pic.o bin/libs/encrypt2-pic.o
+	cc -I $(INCLUDE_DIR) -shared -o bin/broken_libs/libencrypts.so bin/libs/xor-pic.o bin/libs/encrypt2-pic.o
+
+
+bin/libs/xor-pic.o: $(INCLUDE_DIR)/libs/xor.h src/libs/xor.c
+	cc -fPIC -I $(INCLUDE_DIR) -c src/libs/xor.c -o bin/libs/xor-pic.o
+
+bin/libs/encrypt-pic.o: $(INCLUDE_DIR)/libs/encrypt.h src/libs/encrypt.c
+	cc -fPIC -I $(INCLUDE_DIR) -c src/libs/encrypt.c -o bin/libs/encrypt-pic.o
+
+bin/libs/encrypt2-pic.o: $(INCLUDE_DIR)/libs/encrypt.h src/libs/encrypt2.c
+	cc -fPIC -I $(INCLUDE_DIR) -c src/libs/encrypt2.c -o bin/libs/encrypt2-pic.o
diff --git a/C/HF/chap8/bin/ecat b/C/HF/chap8/bin/ecat
deleted file mode 100755
index 1167d31..0000000
--- a/C/HF/chap8/bin/ecat
+++ /dev/null
diff --git a/C/HF/chap8/bin/libs/libencrypt.a b/C/HF/chap8/bin/libs/libencrypt.a
deleted file mode 100644
index f609c17..0000000
--- a/C/HF/chap8/bin/libs/libencrypt.a
+++ /dev/null
diff --git a/C/HF/chap8/src/libs/encrypt2.c b/C/HF/chap8/src/libs/encrypt2.c
new file mode 100644
index 0000000..939df8b
--- /dev/null
+++ b/C/HF/chap8/src/libs/encrypt2.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <libs/encrypt.h>
+
+void encrypt(char *message, encrypt_fn_t encrypt_fn) {
+	encrypt_fn(message);
+}
+
+void encrypt_arr(char *message, encrypt_arr_t fn_arr, int size)
+{
+	printf("BROKEN LIB\n");
+}