Re: [PATCH v2 4/5] Arm: Use read_description funcs in gdbserver

[Simon Marchi <simark@simark.ca>]

> diff --git a/gdb/gdbserver/linux-aarch32-tdesc.c b/gdb/gdbserver/linux-aarch32-tdesc.c
> new file mode 100644
> index 0000000000..3c26df1f96
> --- /dev/null
> +++ b/gdb/gdbserver/linux-aarch32-tdesc.c
> @@ -0,0 +1,46 @@
> +/* Copyright (C) 2019 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/>.  */
> +
> +#include "server.h"
> +#include "tdesc.h"
> +#include "arch/aarch32.h"
> +#include <inttypes.h>
> +
> +static struct target_desc *tdesc_aarch32;
> +
> +/* See linux-aarch32-tdesc.h.  */
> +
> +const target_desc *
> +aarch32_linux_read_description ()
> +{
> +  if (tdesc_aarch32 == nullptr)
> +    {
> +      tdesc_aarch32 = aarch32_create_target_description ();
> +
> +      static const char *expedite_regs[] = { "r11", "sp", "pc", 0 };
> +      init_target_desc (tdesc_aarch32, expedite_regs);
> +    }
> +  return tdesc_aarch32;
> +}
> +
> +/* See linux-aarch32-tdesc.h.  */
> +
> +bool
> +is_aarch32_linux_description (const target_desc *tdesc)
> +{
> +  return tdesc != nullptr && tdesc == tdesc_aarch32;
> +}

If you don't expect tdesc to ever be nullptr, use gdb_assert.

Simon