(Ada) Add ravenscar tasking support on AArch64

This patch adds support for debugging Ravenscar tasks, similar to what
is done for ppc and sparc.

gdb/ChangeLog:

        * aarch64-ravenscar-thread.h, aarch64-ravenscar-thread.c:
        New files.
        * aarch64-tdep.c: #include "aarch64-ravenscar-thread.h".
        (aarch64_gdbarch_init): Add call to register_aarch64_ravenscar_ops.
        * Makefile.in (ALL_64_TARGET_OBS): Add aarch64-ravenscar-thread.o.
        (HFILES_NO_SRCDIR): Add aarch64-ravenscar-thread.h.
        (ALLDEPFILES): Add aarch64-ravenscar-thread.c.
        * configure.tgt (cpu_obs) [aarch64*-*-*]: Add ravenscar-thread.o
        and aarch64-ravenscar-thread.o.
        * NEWS: Add entry documenting Ravenscar tasking support
        on AArch64 ELF.

1 files changed, 27 insertions, 0 deletions

diff --git a/gdb/aarch64-ravenscar-thread.h b/gdb/aarch64-ravenscar-thread.h
new file mode 100644
index 0000000..e900233
--- /dev/null
+++ b/gdb/aarch64-ravenscar-thread.h
@@ -0,0 +1,27 @@
+/* Ravenscar Aarch64 target support.
+ 
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef AARCH64_RAVENSCAR_THREAD_H
+#define AARCH64_RAVENSCAR_THREAD_H
+
+struct gdbarch;
+
+extern void register_aarch64_ravenscar_ops (struct gdbarch *gdbarch);
+
+#endif