Update README.md

src/rewriter/README.md

@@ -30,12 +30,14 @@ Note:
  - only the ".text" section of test.o will be injected into /bin/ls
 
 ### Writing your code in C (limited support) and inject your code.
-Finish the steps in [patch](../patch/README.md) to see how to write your instrumentation code in C.
+Finish the steps in [tutorial](../patch/tutorial/README.md) to see how to write your instrumentation code in C.
 
 Instrument the binary with your instrumentation code.
 ```
-./example/inject_instrumentation.py -f /bin/ls -i instrument_code -o myls
-./myls
+src/analysis/patch-binary.sh /bin/ls your_instrument_code ./newls
+./newls
 ```
-Note:
- - Instrumentation code written in C has limited support that only local variable and constant variable definition is supported. Global variable support will be future work.
+Note that instrumentation code written in C has the following limited support:
+ - only local variable and constant variable definition is supported.
+ - only system call wrapper and PLT functions are supported for hooking.
+ - only support hooking direct jumps and direct calls.