amd64-windows: memory args passed by pointer during function calls.

        * i386-tdep.h (gdbarch_tdep): Add field memory_args_by_pointer.
        * amd64-tdep.c (amd64_push_arguments): Add handling of architectures
        where tdep->memory_args_by_pointer is non-zero.
        * amd64-windows-tdep.c (amd64_windows_init_abi): Set
        tdep->memory_args_by_pointer to 1.

1 files changed, 9 insertions, 0 deletions

diff --git a/gdb/i386-tdep.h b/gdb/i386-tdep.h
index d5b24fa..f79a15d 100644
--- a/gdb/i386-tdep.h
+++ b/gdb/i386-tdep.h
@@ -86,6 +86,15 @@ struct gdbarch_tdep
      the result in CLASS.  Used on amd64 only.  */
   void (*classify) (struct type *type, enum amd64_reg_class class[2]);
 
+  /* Non-zero if the first few MEMORY arguments should be passed by
+     pointer.
+
+     More precisely, MEMORY arguments are passed through the stack.
+     But certain architectures require that their address be passed
+     by register as well, if there are still some integer registers
+     available for argument passing.  */
+  int memory_args_by_pointer;
+
   /* Floating-point registers.  */
   struct regset *fpregset;
   size_t sizeof_fpregset;