binutils-gdb/gdb/gdbserver/linux-aarch64-tdesc.c

/* GNU/Linux/aarch64 specific target description, for the remote server
   for GDB.
   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/>.  */

#include "server.h"
#include "tdesc.h"
#include "arch/aarch64.h"
#include "linux-aarch32-low.h"
#include <inttypes.h>

/* All possible aarch64 target descriptors.  */
struct target_desc *tdesc_aarch64_list[AARCH64_MAX_SVE_VQ + 1];

/* Create the aarch64 target description.  */

const target_desc *
aarch64_linux_read_description (uint64_t vq)
{
  if (vq > AARCH64_MAX_SVE_VQ)
    error (_("VQ is %" PRIu64 ", maximum supported value is %d"), vq,
	   AARCH64_MAX_SVE_VQ);

  struct target_desc *tdesc = tdesc_aarch64_list[vq];

  if (tdesc == NULL)
    {
      tdesc = aarch64_create_target_description (vq);

      static const char *expedite_regs_aarch64[] = { "x29", "sp", "pc", NULL };
      static const char *expedite_regs_aarch64_sve[] = { "x29", "sp", "pc",
							 "vg", NULL };

      if (vq == 0)
	init_target_desc (tdesc, expedite_regs_aarch64);
      else
	init_target_desc (tdesc, expedite_regs_aarch64_sve);

      tdesc_aarch64_list[vq] = tdesc;
    }

  return tdesc;
}