Index: lldb/trunk/source/Plugins/Process/Windows/Common/x64/RegisterContextWindows_x64.cpp
===================================================================
--- lldb/trunk/source/Plugins/Process/Windows/Common/x64/RegisterContextWindows_x64.cpp
+++ lldb/trunk/source/Plugins/Process/Windows/Common/x64/RegisterContextWindows_x64.cpp
@@ -74,12 +74,12 @@
      nullptr,
      nullptr},
     {DEFINE_GPR(rcx, nullptr),
-     {dwarf_rcx_x86_64, dwarf_rcx_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_rcx_x86_64, dwarf_rcx_x86_64, LLDB_REGNUM_GENERIC_ARG1,
       LLDB_INVALID_REGNUM, lldb_rcx_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(rdx, nullptr),
-     {dwarf_rdx_x86_64, dwarf_rdx_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_rdx_x86_64, dwarf_rdx_x86_64, LLDB_REGNUM_GENERIC_ARG2,
       LLDB_INVALID_REGNUM, lldb_rdx_x86_64},
      nullptr,
      nullptr},
@@ -104,22 +104,22 @@
      nullptr,
      nullptr},
     {DEFINE_GPR(r8, nullptr),
-     {dwarf_r8_x86_64, dwarf_r8_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r8_x86_64, dwarf_r8_x86_64, LLDB_REGNUM_GENERIC_ARG3,
       LLDB_INVALID_REGNUM, lldb_r8_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r9, nullptr),
-     {dwarf_r9_x86_64, dwarf_r9_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r9_x86_64, dwarf_r9_x86_64, LLDB_REGNUM_GENERIC_ARG4,
       LLDB_INVALID_REGNUM, lldb_r9_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r10, nullptr),
-     {dwarf_r10_x86_64, dwarf_r10_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r10_x86_64, dwarf_r10_x86_64, LLDB_REGNUM_GENERIC_ARG5,
       LLDB_INVALID_REGNUM, lldb_r10_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r11, nullptr),
-     {dwarf_r11_x86_64, dwarf_r11_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r11_x86_64, dwarf_r11_x86_64, LLDB_REGNUM_GENERIC_ARG6,
       LLDB_INVALID_REGNUM, lldb_r11_x86_64},
      nullptr,
      nullptr},