Fix types

src/sys/ptrace.rs

@@ -191,31 +191,37 @@ type Word = usize;
 
 /// Makes the `PTRACE_SYSCALL` request to ptrace
 pub fn syscall(pid: Pid) -> Result<()> {
-    ptrace(ptrace::PTRACE_SYSCALL, pid, ptr::null_mut(), ptr::null_mut()).map(|_| ()) // ignore the useless return value
+    unsafe {
+        ptrace(ptrace::PTRACE_SYSCALL, pid, ptr::null_mut(), ptr::null_mut()).map(|_| ()) // ignore the useless return value
+    }
 }
 
 /// Makes the `PTRACE_PEEKUSER` request to ptrace
 pub fn peekuser(pid: Pid, reg: Register) -> Result<Word> {
     let reg_arg = (reg as i32) as *mut c_void;
-    ptrace(ptrace::PTRACE_PEEKUSER, pid, reg_arg, ptr::null_mut())
-}
+    unsafe {
+        ptrace(ptrace::PTRACE_PEEKUSER, pid, reg_arg, ptr::null_mut()).map(|r| r as Word)
+    }
+} 
 
 /// Sets the process as traceable with `PTRACE_TRACEME`
 pub fn traceme() -> Result<()> {
-    ptrace(
-        ptrace::PTRACE_TRACEME,
-        Pid::from_raw(0),
-        ptr::null_mut(),
-        ptr::null_mut(),
-    ).map(|_| ()) // ignore the useless return value
+    unsafe {
+        ptrace(
+            ptrace::PTRACE_TRACEME,
+            Pid::from_raw(0),
+            ptr::null_mut(),
+            ptr::null_mut(),
+        ).map(|_| ()) // ignore the useless return value
+    }
 }
 
 /// Makes the `PTRACE_PEEKDATA` request to ptrace
 /// 
 /// This function allows to access arbitrary data in the traced process
 /// and may crash the inferior if used incorrectly and is thus marked `unsafe`.
 pub unsafe fn peekdata(pid: Pid, addr: usize) -> Result<Word> {
-    ptrace(ptrace::PTRACE_PEEKDATA, pid, addr as *mut c_void, ptr::null_mut())
+    ptrace(ptrace::PTRACE_PEEKDATA, pid, addr as *mut c_void, ptr::null_mut()).map(|r| r as Word)
 }
 
 /// Makes the `PTRACE_PEEKDATA` request to ptrace