Index: libunwind/trunk/include/__libunwind_config.h
===================================================================
--- libunwind/trunk/include/__libunwind_config.h
+++ libunwind/trunk/include/__libunwind_config.h
@@ -15,33 +15,39 @@
 #define _LIBUNWIND_ARM_EHABI
 #endif
 
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86       8
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64    32
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC       112
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64     95
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM       95
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K      31
+
 #if defined(_LIBUNWIND_IS_NATIVE_ONLY)
 # if defined(__i386__)
 #  define _LIBUNWIND_TARGET_I386
 #  define _LIBUNWIND_CONTEXT_SIZE 8
 #  define _LIBUNWIND_CURSOR_SIZE 19
-#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 8
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86
 # elif defined(__x86_64__)
 #  define _LIBUNWIND_TARGET_X86_64 1
 #  if defined(_WIN64)
 #    define _LIBUNWIND_CONTEXT_SIZE 54
 #    define _LIBUNWIND_CURSOR_SIZE 66
-#    define _LIBUNWIND_HIGHEST_DWARF_REGISTER 32
 #  else
 #    define _LIBUNWIND_CONTEXT_SIZE 21
 #    define _LIBUNWIND_CURSOR_SIZE 33
-#    define _LIBUNWIND_HIGHEST_DWARF_REGISTER 16
 #  endif
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64
 # elif defined(__ppc__)
 #  define _LIBUNWIND_TARGET_PPC 1
 #  define _LIBUNWIND_CONTEXT_SIZE 117
 #  define _LIBUNWIND_CURSOR_SIZE 128
-#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 112
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC
 # elif defined(__aarch64__)
 #  define _LIBUNWIND_TARGET_AARCH64 1
 #  define _LIBUNWIND_CONTEXT_SIZE 66
 #  define _LIBUNWIND_CURSOR_SIZE 78
-#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 95
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64
 # elif defined(__arm__)
 #  define _LIBUNWIND_TARGET_ARM 1
 #  if defined(__ARM_WMMX)
@@ -51,12 +57,12 @@
 #    define _LIBUNWIND_CONTEXT_SIZE 42
 #    define _LIBUNWIND_CURSOR_SIZE 49
 #  endif
-#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 95
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM
 # elif defined(__or1k__)
 #  define _LIBUNWIND_TARGET_OR1K 1
 #  define _LIBUNWIND_CONTEXT_SIZE 16
 #  define _LIBUNWIND_CURSOR_SIZE 28
-#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 31
+#  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K
 # else
 #  error "Unsupported architecture."
 # endif
Index: libunwind/trunk/src/Registers.hpp
===================================================================
--- libunwind/trunk/src/Registers.hpp
+++ libunwind/trunk/src/Registers.hpp
@@ -44,7 +44,7 @@
   void        setVectorRegister(int num, v128 value);
   const char *getRegisterName(int num);
   void        jumpto();
-  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER; }
+  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86; }
 
   uint32_t  getSP() const          { return _registers.__esp; }
   void      setSP(uint32_t value)  { _registers.__esp = value; }
@@ -250,7 +250,7 @@
   void        setVectorRegister(int num, v128 value);
   const char *getRegisterName(int num);
   void        jumpto();
-  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER; }
+  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64; }
 
   uint64_t  getSP() const          { return _registers.__rsp; }
   void      setSP(uint64_t value)  { _registers.__rsp = value; }
@@ -560,7 +560,7 @@
   void        setVectorRegister(int num, v128 value);
   const char *getRegisterName(int num);
   void        jumpto();
-  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER; }
+  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC; }
 
   uint64_t  getSP() const         { return _registers.__r1; }
   void      setSP(uint32_t value) { _registers.__r1 = value; }
@@ -1126,7 +1126,7 @@
   void        setVectorRegister(int num, v128 value);
   const char *getRegisterName(int num);
   void        jumpto();
-  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER; }
+  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64; }
 
   uint64_t  getSP() const         { return _registers.__sp; }
   void      setSP(uint64_t value) { _registers.__sp = value; }
@@ -1875,7 +1875,7 @@
   void        setVectorRegister(int num, v128 value);
   const char *getRegisterName(int num);
   void        jumpto();
-  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER; }
+  static int  lastDwarfRegNum() { return _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K; }
 
   uint64_t  getSP() const         { return _registers.__r[1]; }
   void      setSP(uint32_t value) { _registers.__r[1] = value; }