Switch PalPtrace to Rusty error handling.

src/platform/linux/ptrace.rs

@@ -1,10 +1,16 @@
 use super::{
     super::{types::*, PalPtrace},
-    e, Sys,
+    e_raw, Sys,
 };
+use crate::error::Result;
 
 impl PalPtrace for Sys {
-    fn ptrace(request: c_int, pid: pid_t, addr: *mut c_void, data: *mut c_void) -> c_int {
-        unsafe { e(syscall!(PTRACE, request, pid, addr, data)) as c_int }
+    unsafe fn ptrace(
+        request: c_int,
+        pid: pid_t,
+        addr: *mut c_void,
+        data: *mut c_void,
+    ) -> Result<c_int> {
+        Ok(unsafe { e_raw(syscall!(PTRACE, request, pid, addr, data))? as c_int })
     }
 }