diff --git a/src/common/dwarf_cfi_to_module.cc b/src/common/dwarf_cfi_to_module.cc
index 49a6d85..611cecd 100644
--- a/src/common/dwarf_cfi_to_module.cc
+++ b/src/common/dwarf_cfi_to_module.cc
@@ -42,6 +42,59 @@
 
 using std::ostringstream;
 
+vector<string> DwarfCFIToModule::RegisterNames::MakeVector(
+    const char * const *strings,
+    size_t size) {
+  vector<string> names(strings, strings + size);
+  return names;
+}
+
+vector<string> DwarfCFIToModule::RegisterNames::I386() {
+  static const char *const names[] = {
+    "$eax", "$ecx", "$edx", "$ebx", "$esp", "$ebp", "$esi", "$edi",
+    "$eip", "$eflags", "$unused1",
+    "$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
+    "$unused2", "$unused3",
+    "$xmm0", "$xmm1", "$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
+    "$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
+    "$fcw", "$fsw", "$mxcsr",
+    "$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused4", "$unused5",
+    "$tr", "$ldtr"
+  };
+
+  return MakeVector(names, sizeof(names) / sizeof(names[0]));
+}
+
+vector<string> DwarfCFIToModule::RegisterNames::X86_64() {
+  static const char *const names[] = {
+    "$rax", "$rdx", "$rcx", "$rbx", "$rsi", "$rdi", "$rbp", "$rsp",
+    "$r8",  "$r9",  "$r10", "$r11", "$r12", "$r13", "$r14", "$r15",
+    "$rip",
+    "$xmm0","$xmm1","$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
+    "$xmm8","$xmm9","$xmm10","$xmm11","$xmm12","$xmm13","$xmm14","$xmm15",
+    "$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
+    "$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
+    "$rflags",
+    "$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused1", "$unused2",
+    "$fs.base", "$gs.base", "$unused3", "$unused4",
+    "$tr", "$ldtr",
+    "$mxcsr", "$fcw", "$fsw"
+  };
+
+  return MakeVector(names, sizeof(names) / sizeof(names[0]));
+}
+
+vector<string> DwarfCFIToModule::RegisterNames::ARM() {
+  static const char *const names[] = {
+    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
+    "r8",  "r9",  "r10", "r11", "r12", "sp",  "lr",  "pc",
+    "f0",  "f1",  "f2",  "f3",  "f4",  "f5",  "f6",  "f7",
+    "fps", "cpsr"
+  };
+
+  return MakeVector(names, sizeof(names) / sizeof(names[0]));
+}
+
 bool DwarfCFIToModule::Entry(size_t offset, uint64 address, uint64 length,
                              uint8 version, const string &augmentation,
                              unsigned return_address) {
diff --git a/src/common/dwarf_cfi_to_module.h b/src/common/dwarf_cfi_to_module.h
index 002fc90..4f4ce0a 100644
--- a/src/common/dwarf_cfi_to_module.h
+++ b/src/common/dwarf_cfi_to_module.h
@@ -91,6 +91,26 @@
     string file_, section_;
   };
 
+  // Register name tables. If TABLE is a vector returned by one of these
+  // functions, then TABLE[R] is the name of the register numbered R in
+  // DWARF call frame information.
+  class RegisterNames {
+   public:
+    // Intel's "x86" or IA-32.
+    static vector<string> I386();
+
+    // AMD x86_64, AMD64, Intel EM64T, or Intel 64
+    static vector<string> X86_64();
+
+    // ARM.
+    static vector<string> ARM();
+
+   private:
+    // Given STRINGS, an array of C strings with SIZE elements, return an
+    // equivalent vector<string>.
+    static vector<string> MakeVector(const char * const *strings, size_t size);
+  };
+
   // Create a handler for the dwarf2reader::CallFrameInfo parser that
   // records the stack unwinding information it receives in MODULE.
   //
diff --git a/src/common/dwarf_cfi_to_module_unittest.cc b/src/common/dwarf_cfi_to_module_unittest.cc
index 516b978..9477296 100644
--- a/src/common/dwarf_cfi_to_module_unittest.cc
+++ b/src/common/dwarf_cfi_to_module_unittest.cc
@@ -258,3 +258,31 @@
   EXPECT_THAT(entries[0]->rule_changes, ContainerEq(expected_changes));
 }
 
+TEST(RegisterNames, I386) {
+  vector<string> names = DwarfCFIToModule::RegisterNames::I386();
+
+  EXPECT_EQ("$eax", names[0]);
+  EXPECT_EQ("$ecx", names[1]);
+  EXPECT_EQ("$esp", names[4]);
+  EXPECT_EQ("$eip", names[8]);
+}
+
+TEST(RegisterNames, ARM) {
+  vector<string> names = DwarfCFIToModule::RegisterNames::ARM();
+
+  EXPECT_EQ("r0", names[0]);
+  EXPECT_EQ("r10", names[10]);
+  EXPECT_EQ("sp", names[13]);
+  EXPECT_EQ("lr", names[14]);
+  EXPECT_EQ("pc", names[15]);
+}
+
+TEST(RegisterNames, X86_64) {
+  vector<string> names = DwarfCFIToModule::RegisterNames::X86_64();
+
+  EXPECT_EQ("$rax", names[0]);
+  EXPECT_EQ("$rdx", names[1]);
+  EXPECT_EQ("$rbp", names[6]);
+  EXPECT_EQ("$rsp", names[7]);
+  EXPECT_EQ("$rip", names[16]);
+}
diff --git a/src/common/linux/dump_symbols.cc b/src/common/linux/dump_symbols.cc
index ea55cc7..c3648e9 100644
--- a/src/common/linux/dump_symbols.cc
+++ b/src/common/linux/dump_symbols.cc
@@ -226,56 +226,19 @@
 static bool DwarfCFIRegisterNames(const ElfW(Ehdr) *elf_header,
                                   vector<string> *register_names)
 {
-  static const char *const i386_names[] = {
-    "$eax", "$ecx", "$edx", "$ebx", "$esp", "$ebp", "$esi", "$edi",
-    "$eip", "$eflags", "$unused1",
-    "$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
-    "$unused2", "$unused3",
-    "$xmm0", "$xmm1", "$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
-    "$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
-    "$fcw", "$fsw", "$mxcsr",
-    "$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused4", "$unused5",
-    "$tr", "$ldtr",
-    NULL
-  };
-
-  static const char *const x86_64_names[] = {
-    "$rax", "$rdx", "$rcx", "$rbx", "$rsi", "$rdi", "$rbp", "$rsp",
-    "$r8",  "$r9",  "$r10", "$r11", "$r12", "$r13", "$r14", "$r15",
-    "$rip",
-    "$xmm0","$xmm1","$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
-    "$xmm8","$xmm9","$xmm10","$xmm11","$xmm12","$xmm13","$xmm14","$xmm15",
-    "$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
-    "$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
-    "$rflags",
-    "$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused1", "$unused2",
-    "$fs.base", "$gs.base", "$unused3", "$unused4",
-    "$tr", "$ldtr",
-    "$mxcsr", "$fcw", "$fsw",
-    NULL
-  };
-
-  static const char *const arm_names[] = {
-    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
-    "r8",  "r9",  "r10", "r11", "r12", "sp",  "lr",  "pc",
-    "f0",  "f1",  "f2",  "f3",  "f4",  "f5",  "f6",  "f7",
-    "fps", "cpsr",
-    NULL
-  };
-
-  const char * const *name_table;
   switch (elf_header->e_machine) {
-    case EM_386:    name_table = i386_names;   break;
-    case EM_ARM:    name_table = arm_names;    break;
-    case EM_X86_64: name_table = x86_64_names; break;
+    case EM_386:
+      *register_names = DwarfCFIToModule::RegisterNames::I386();
+      return true;
+    case EM_ARM:
+      *register_names = DwarfCFIToModule::RegisterNames::ARM();
+      return true;
+    case EM_X86_64:
+      *register_names = DwarfCFIToModule::RegisterNames::X86_64();
+      return true;
     default:
       return false;
   }
-
-  register_names->clear();
-  for (int i = 0; name_table[i]; i++)
-    register_names->push_back(name_table[i]);
-  return true;
 }
 
 static bool LoadDwarfCFI(const string &dwarf_filename,