Add peekdata and pokedata

Author: marmistrz

src/sys/ptrace.rs

@@ -204,3 +204,18 @@ pub fn traceme() -> Result<()> {
         ptr::null_mut(),
     ).map(|_| ()) // ignore the useless return value
 }
+
+/// Makes the `PTRACE_PEEKDATA` request to ptrace
+pub fn peekdata(pid: Pid, addr: c_long) -> Result<c_long> {
+    ptrace(ptrace::PTRACE_PEEKDATA, pid, addr as *mut c_void, ptr::null_mut())
+}
+
+/// Makes the `PTRACE_PEEKDATA` request to ptrace
+pub fn pokedata(pid: Pid, addr: c_long, val: c_long) -> Result<()> {
+    ptrace(
+        ptrace::PTRACE_POKEDATA,
+        pid,
+        addr as *mut c_void,
+        val as *mut c_void,
+    ).map(|_| ()) // ignore the useless return value
+}