Handle bit offset and bit size in base types

[deliverable/binutils-gdb.git] / gdb / dwarf2 / read.c

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index a339141ce0bf6144b370af85575c6006022f8857..977bdb856893b7794d4c32b1b97aef5a157aa9df 100644 (file)
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -18054,6 +18054,26 @@ read_base_type (struct die_info *die, struct dwarf2_cu *cu)
 
   type->set_endianity_is_not_default (gdbarch_byte_order (arch) != byte_order);
 
+  if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_INT)
+    {
+      attr = dwarf2_attr (die, DW_AT_bit_size, cu);
+      if (attr != nullptr && DW_UNSND (attr) <= 8 * TYPE_LENGTH (type))
+       {
+         unsigned real_bit_size = DW_UNSND (attr);
+         attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu);
+         /* Only use the attributes if they make sense together.  */
+         if (attr == nullptr
+             || DW_UNSND (attr) + real_bit_size <= 8 * TYPE_LENGTH (type))
+           {
+             TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_size
+               = real_bit_size;
+             if (attr != nullptr)
+               TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_offset
+                 = DW_UNSND (attr);
+           }
+       }
+    }
+
   return set_die_type (die, type, cu);
 }