tweak

fuzzer/Fuzzer.java

@@ -21,9 +21,21 @@ public class Fuzzer {
             /* We just print one instruction.
                Hint: you might want to make use of the instruction
                grammar which is effectively encoded in Instruction.java */
-            pw.println("MOV R0 0");
-            pw.println("LDR R2 R0 0");
-            pw.println("RET R2");           
+            pw.println("ADD R0 R1 R2");
+            pw.println("ADD R3 R4 R5");
+            pw.println("ADD R6 R7 R8");
+            pw.println("ADD R9 R10 R11");
+            pw.println("ADD R12 R13 R14");
+            pw.println("ADD R15 R16 R17");
+            pw.println("ADD R18 R19 R20");
+            pw.println("ADD R21 R0 R3");
+            pw.println("ADD R22 R6 R9");
+            pw.println("ADD R23 R12 R15");
+            pw.println("ADD R24 R18 R21");
+            pw.println("ADD R25 R22 R23");
+            pw.println("ADD R26 R24 R25");
+            pw.println("RET R26");
+         
             
         }catch (Exception e){
             e.printStackTrace(System.err);

src/machine-vuln1.c

@@ -55,13 +55,12 @@ unsigned int count = 0; /* counts number of instructions executed so far */
 
 
 static void machine_init(void){
-  /*Change doesn't clean all of memory, doing a read on the last memory loc vuln*/
   memory = malloc(sizeof(int32_t)*(MEMORY_SIZE));
   regs = malloc(sizeof(int32_t)*NUM_REGS);
 
   /* memset can be vulnerable - changes to this can result in dirty memory to be read*/
  // memset(memory,0,sizeof(int32_t)*MEMORY_SIZE);
-  memset(regs,0,sizeof(int32_t)*NUM_REGS);
+ // memset(regs,0,sizeof(int32_t)*NUM_REGS);
   count = 0;
 }