diff --git a/linux-user/strace.list b/linux-user/strace.list
index 4f9c364664..cf5841af60 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1521,3 +1521,9 @@
 #ifdef TARGET_NR_pipe2
 { TARGET_NR_pipe2, "pipe2", NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_atomic_cmpxchg_32
+{ TARGET_NR_atomic_cmpxchg_32, "atomic_cmpxchg_32", NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_atomic_barrier
+{ TARGET_NR_atomic_barrier, "atomic_barrier", NULL, NULL, NULL },
+#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index aebe36dea7..b3822b32a0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9132,6 +9132,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         }
         break;
     }
+#endif
+#ifdef TARGET_NR_atomic_cmpxchg_32
+    case TARGET_NR_atomic_cmpxchg_32:
+    {
+        /* should use start_exclusive from main.c */
+        abi_ulong mem_value;
+        if (get_user_u32(mem_value, arg6)) {
+            target_siginfo_t info;
+            info.si_signo = SIGSEGV;
+            info.si_errno = 0;
+            info.si_code = TARGET_SEGV_MAPERR;
+            info._sifields._sigfault._addr = arg6;
+            queue_signal((CPUArchState *)cpu_env, info.si_signo, &info);
+            ret = 0xdeadbeef;
+
+        }
+        if (mem_value == arg2)
+            put_user_u32(arg1, arg6);
+        ret = mem_value;
+        break;
+    }
+#endif
+#ifdef TARGET_NR_atomic_barrier
+    case TARGET_NR_atomic_barrier:
+    {
+        /* Like the kernel implementation and the qemu arm barrier, no-op this? */
+        break;
+    }
 #endif
     default:
     unimplemented: