gdb/gdbserver/linux-arm-tdesc.c

   1 /* Copyright (C) 2019-2020 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "server.h"
  19 #include "tdesc.h"
  20 #include "arch/arm.h"
  21 #include <inttypes.h>
  22
  23 /* All possible Arm target descriptors.  */
  24 static struct target_desc *tdesc_arm_list[ARM_FP_TYPE_INVALID];
  25
  26 /* See linux-arm-tdesc.h.  */
  27
  28 const target_desc *
  29 arm_linux_read_description (arm_fp_type fp_type)
  30 {
  31   struct target_desc *tdesc = tdesc_arm_list[fp_type];
  32
  33   if (tdesc == nullptr)
  34     {
  35       tdesc = arm_create_target_description (fp_type);
  36
  37       static const char *expedite_regs[] = { "r11", "sp", "pc", 0 };
  38       init_target_desc (tdesc, expedite_regs);
  39
  40       tdesc_arm_list[fp_type] = tdesc;
  41     }
  42
  43   return tdesc;
  44 }
  45
  46 /* See linux-arm-tdesc.h.  */
  47
  48 arm_fp_type
  49 arm_linux_get_tdesc_fp_type (const target_desc *tdesc)
  50 {
  51   gdb_assert (tdesc != nullptr);
  52
  53   /* Many of the tdesc_arm_list entries may not have been initialised yet.  This
  54      is ok, because tdesc must be one of the initialised ones.  */
  55   for (int i = ARM_FP_TYPE_NONE; i < ARM_FP_TYPE_INVALID; i++)
  56     {
  57       if (tdesc == tdesc_arm_list[i])
  58         return (arm_fp_type) i;
  59     }
  60
  61   return ARM_FP_TYPE_INVALID;
  62 }