dbghelp: Add 2 new darf defines and implement DW_OP_stack_value.

dlls/dbghelp/dwarf.c

@@ -847,6 +847,10 @@ compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
                loc->kind = loc_dwarf2_block;
             }
             break;
+        case DW_OP_stack_value:
+            /* Expected behaviour is that this is the last instruction of this
+             * expression and just the "top of stack" value should be put to loc->offset. */
+            break;
         default:
             if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
                 FIXME("Unhandled attr op: %x\n", op);

dlls/dbghelp/dwarf.h

@@ -379,6 +379,9 @@ typedef enum dwarf_operation_e
   DW_OP_form_tls_address                = 0x9b,
   DW_OP_call_frame_cfa                  = 0x9c,
   DW_OP_bit_piece                       = 0x9d,
+  /** Dwarf4 new values */
+  DW_OP_implicit_value                  = 0x9e,
+  DW_OP_stack_value                     = 0x9f,
 
   /* Implementation defined extensions */
   DW_OP_lo_user                         = 0xe0,

dlls/dbghelp/symbol.c

@@ -724,6 +724,10 @@ static void symt_fill_sym_info(struct module_pair* pair,
                         sym_info->Register = loc.reg ? loc.reg : CV_REG_EBP;
                         sym_info->Address = loc.offset;
                         break;
+                    case loc_absolute:
+                        sym_info->Flags |= SYMFLAG_VALUEPRESENT;
+                        sym_info->Value = loc.offset;
+                        break;
                     default:
                         FIXME("Shouldn't happen (kind=%d), debug reader backend is broken\n", loc.kind);
                         assert(0);