* defs.h (enum return_value_convention): Add

RETURN_VALUE_ABI_RETURNS_ADDRESS and
RETURN_VALUE_ABI_PRESERVES_ADDRESS.
* infcmd.c (legacy_return_value): New function.
(print_return_value): Rwerite to implement
RETURN_VALUE_ABI_RETURNS_ADDRESS.
* values.c (using_struct_return): Check for inequality to
RETURN_VALUE_REGISTER_CONVENTION instead of equality to
RETURN_VALUE_STRUCT_CONVENTION.
* i386-tdep.c (i386_return_value): Implement
RETURN_VALUE_ABI_RETURNS_ADDRESS.

1 files changed, 13 insertions, 1 deletions

diff --git a/gdb/defs.h b/gdb/defs.h
index 362f4a7..9771428 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -250,7 +250,19 @@ enum return_value_convention
      should be stored.  While typically, and historically, used for
      large structs, this is convention is applied to values of many
      different types.  */
-  RETURN_VALUE_STRUCT_CONVENTION
+  RETURN_VALUE_STRUCT_CONVENTION,
+  /* Like the "struct return convention" above, but where the ABI
+     guarantees that the called function stores the address at which
+     the value being returned is stored in a well-defined location,
+     such as a register or memory slot in the stack frame.  Don't use
+     this if the ABI doesn't explicitly guarantees this.  */
+  RETURN_VALUE_ABI_RETURNS_ADDRESS,
+  /* Like the "struct return convention" above, but where the ABI
+     guarantees that the address at which the value being returned is
+     stored will be available in a well-defined location, such as a
+     register or memory slot in the stack frame.  Don't use this if
+     the ABI doesn't explicitly guarantees this.  */
+  RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 };
 
 /* the cleanup list records things that have to be undone