[PATCH 10/12] gdb: change linux gdbarch data from post to pre-init

[Simon Marchi via Gdb-patches <gdb-patches@sourceware.org>]

The following patch will need to fill a field in linux_gdbarch_data
while the gdbarch is being built.  linux_gdbarch_data is currently
allocated as a post-init gdbarch data, meaning it's not possible to fill
it before the gdbarch is completely initialized.  Change it to a
pre-init gdbarch data to allow this.

The init_linux_gdbarch_data function doesn't use the created gdbarch,
it only allocates the linux_gdbarch_data structure on the gdbarch's
obstack, so the change is trivial.

gdb/ChangeLog:

	* linux-tdep.c (init_linux_gdbarch_data): Change parameter to
	obkstack.
	(_initialize_linux_tdep): Register pre-init gdb data instead of
	post-init.

Change-Id: If35ce91b6bb5435680d43b9268d811d95661644f
---
 gdb/linux-tdep.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index f3d1ccb4d1c..767cca4afd0 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -171,9 +171,9 @@ struct linux_gdbarch_data
   };
 
 static void *
-init_linux_gdbarch_data (struct gdbarch *gdbarch)
+init_linux_gdbarch_data (struct obstack *obstack)
 {
-  return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data);
+  return obstack_zalloc<linux_gdbarch_data> (obstack);
 }
 
 static struct linux_gdbarch_data *
@@ -2673,7 +2673,7 @@ void
 _initialize_linux_tdep ()
 {
   linux_gdbarch_data_handle =
-    gdbarch_data_register_post_init (init_linux_gdbarch_data);
+    gdbarch_data_register_pre_init (init_linux_gdbarch_data);
 
   /* Observers used to invalidate the cache when needed.  */
   gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf);
-- 
2.28.0