diff --git a/src/debugger.h b/src/debugger.h
index fb98079..322f25c 100644
--- a/src/debugger.h
+++ b/src/debugger.h
@@ -1,6 +1,7 @@
 #include <editline/readline.h>
 
 #include "breakpoint.h"
+#include "register.h"
 #include "util.h"
 
 typedef struct {
diff --git a/src/register.c b/src/register.c
new file mode 100644
index 0000000..7447eac
--- /dev/null
+++ b/src/register.c
@@ -0,0 +1,33 @@
+#include "register.h"
+
+int n_registers = 27;
+
+const reg_descriptor reg_descriptors[27] = {
+    { r15, 15, "r15" },
+    { r14, 14, "r14" },
+    { r13, 13, "r13" },
+    { r12, 12, "r12" },
+    { rbp, 6, "rbp" },
+    { rbx, 3, "rbx" },
+    { r11, 11, "r11" },
+    { r10, 10, "r10" },
+    { r9, 9, "r9" },
+    { r8, 8, "r8" },
+    { rax, 0, "rax" },
+    { rcx, 2, "rcx" },
+    { rdx, 1, "rdx" },
+    { rsi, 4, "rsi" },
+    { rdi, 5, "rdi" },
+    { orig_rax, -1, "orig_rax" },
+    { rip, -1, "rip" },
+    { cs, 51, "cs" },
+    { rflags, 49, "eflags" },
+    { rsp, 7, "rsp" },
+    { ss, 52, "ss" },
+    { fs_base, 58, "fs_base" },
+    { gs_base, 59, "gs_base" },
+    { ds, 53, "ds" },
+    { es, 50, "es" },
+    { fs, 54, "fs" },
+    { gs, 55, "gs" },
+};
diff --git a/src/register.h b/src/register.h
new file mode 100644
index 0000000..9ece69a
--- /dev/null
+++ b/src/register.h
@@ -0,0 +1,41 @@
+#pragma once
+
+typedef enum {
+  rax,
+  rbx,
+  rcx,
+  rdx,
+  rdi,
+  rsi,
+  rbp,
+  rsp,
+  r8,
+  r9,
+  r10,
+  r11,
+  r12,
+  r13,
+  r14,
+  r15,
+  rip,
+  rflags,
+  cs,
+  orig_rax,
+  fs_base,
+  gs_base,
+  fs,
+  gs,
+  ss,
+  ds,
+  es,
+} reg;
+
+
+typedef struct {
+    reg r;
+    int dwarf_r;
+    const char name[10];
+} reg_descriptor;
+
+int n_registers;
+const reg_descriptor reg_descriptors[27];