gdbserver/linux-arm-tdesc.cc

   1 /* Copyright (C) 2019-2024 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
  19 #include "linux-arm-tdesc.h"
  20
  21 #include "tdesc.h"
  22 #include "arch/arm.h"
  23 #include <inttypes.h>
  24
  25 /* All possible Arm target descriptors.  */
  26 static struct target_desc *tdesc_arm_list[ARM_FP_TYPE_INVALID];
  27
  28 /* See linux-arm-tdesc.h.  */
  29
  30 const target_desc *
  31 arm_linux_read_description (arm_fp_type fp_type)
  32 {
  33   struct target_desc *tdesc = tdesc_arm_list[fp_type];
  34
  35   if (tdesc == nullptr)
  36     {
  37       tdesc = arm_create_target_description (fp_type, false);
  38
  39       static const char *expedite_regs[] = { "r11", "sp", "pc", 0 };
  40       init_target_desc (tdesc, expedite_regs, GDB_OSABI_LINUX);
  41
  42       tdesc_arm_list[fp_type] = tdesc;
  43     }
  44
  45   return tdesc;
  46 }
  47
  48 /* See linux-arm-tdesc.h.  */
  49
  50 arm_fp_type
  51 arm_linux_get_tdesc_fp_type (const target_desc *tdesc)
  52 {
  53   gdb_assert (tdesc != nullptr);
  54
  55   /* Many of the tdesc_arm_list entries may not have been initialised yet.  This
  56      is ok, because tdesc must be one of the initialised ones.  */
  57   for (int i = ARM_FP_TYPE_NONE; i < ARM_FP_TYPE_INVALID; i++)
  58     {
  59       if (tdesc == tdesc_arm_list[i])
  60         return (arm_fp_type) i;
  61     }
  62
  63   return ARM_FP_TYPE_INVALID;
  64 }