gdb/gdbserver/linux-aarch64-tdesc.c

   1 /* GNU/Linux/aarch64 specific target description, for the remote server
   2    for GDB.
   3    Copyright (C) 2017-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "server.h"
  21 #include "tdesc.h"
  22 #include "arch/aarch64.h"
  23 #include "linux-aarch32-low.h"
  24 #include <inttypes.h>
  25
  26 /* All possible aarch64 target descriptors.  */
  27 struct target_desc *tdesc_aarch64_list[AARCH64_MAX_SVE_VQ + 1][2/*pauth*/];
  28
  29 /* Create the aarch64 target description.  */
  30
  31 const target_desc *
  32 aarch64_linux_read_description (uint64_t vq, bool pauth_p)
  33 {
  34   if (vq > AARCH64_MAX_SVE_VQ)
  35     error (_("VQ is %" PRIu64 ", maximum supported value is %d"), vq,
  36            AARCH64_MAX_SVE_VQ);
  37
  38   struct target_desc *tdesc = tdesc_aarch64_list[vq][pauth_p];
  39
  40   if (tdesc == NULL)
  41     {
  42       tdesc = aarch64_create_target_description (vq, pauth_p);
  43
  44       static const char *expedite_regs_aarch64[] = { "x29", "sp", "pc", NULL };
  45       static const char *expedite_regs_aarch64_sve[] = { "x29", "sp", "pc",
  46                                                          "vg", NULL };
  47
  48       if (vq == 0)
  49         init_target_desc (tdesc, expedite_regs_aarch64);
  50       else
  51         init_target_desc (tdesc, expedite_regs_aarch64_sve);
  52
  53       tdesc_aarch64_list[vq][pauth_p] = tdesc;
  54     }
  55
  56   return tdesc;
  57 }