diff --git a/src/common/hos/cpu.d b/src/common/hos/cpu.d
new file mode 100644
index 0000000..536330b
--- /dev/null
+++ b/src/common/hos/cpu.d
@@ -0,0 +1,21 @@
+import ldc.llvmasm;
+
+ulong read_cr0()
+{
+    return __asm!ulong("mov %cr0, %rax", "={rax}");
+}
+
+ulong read_cr2()
+{
+    return __asm!ulong("mov %cr2, %rax", "={rax}");
+}
+
+ulong read_cr3()
+{
+    return __asm!ulong("mov %cr3, %rax", "={rax}");
+}
+
+ulong read_cr4()
+{
+    return __asm!ulong("mov %cr4, %rax", "={rax}");
+}