gdb/arch/aarch64.c

   1 /* Copyright (C) 2017-2023 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 "gdbsupport/common-defs.h"
  19 #include "aarch64.h"
  20 #include <stdlib.h>
  21
  22 #include "../features/aarch64-core.c"
  23 #include "../features/aarch64-fpu.c"
  24 #include "../features/aarch64-sve.c"
  25 #include "../features/aarch64-pauth.c"
  26 #include "../features/aarch64-mte.c"
  27 #include "../features/aarch64-sme.c"
  28 #include "../features/aarch64-sme2.c"
  29 #include "../features/aarch64-tls.c"
  30
  31 /* See arch/aarch64.h.  */
  32
  33 target_desc *
  34 aarch64_create_target_description (const aarch64_features &features)
  35 {
  36   target_desc_up tdesc = allocate_target_description ();
  37
  38 #ifndef IN_PROCESS_AGENT
  39   set_tdesc_architecture (tdesc.get (), "aarch64");
  40 #endif
  41
  42   long regnum = 0;
  43
  44   regnum = create_feature_aarch64_core (tdesc.get (), regnum);
  45
  46   if (features.vq == 0)
  47     regnum = create_feature_aarch64_fpu (tdesc.get (), regnum);
  48   else
  49     regnum = create_feature_aarch64_sve (tdesc.get (), regnum, features.vq);
  50
  51   if (features.pauth)
  52     regnum = create_feature_aarch64_pauth (tdesc.get (), regnum);
  53
  54   /* Memory tagging extension registers.  */
  55   if (features.mte)
  56     regnum = create_feature_aarch64_mte (tdesc.get (), regnum);
  57
  58   /* TLS registers.  */
  59   if (features.tls > 0)
  60     regnum = create_feature_aarch64_tls (tdesc.get (), regnum, features.tls);
  61
  62   if (features.svq)
  63     regnum = create_feature_aarch64_sme (tdesc.get (), regnum,
  64                                          sve_vl_from_vq (features.svq));
  65
  66   if (features.sme2)
  67     regnum = create_feature_aarch64_sme2 (tdesc.get (), regnum);
  68
  69   return tdesc.release ();
  70 }
  71
  72 /* See arch/aarch64.h.  */
  73
  74 CORE_ADDR
  75 aarch64_remove_top_bits (CORE_ADDR pointer, CORE_ADDR mask)
  76 {
  77   /* The VA range select bit is 55.  This bit tells us if we have a
  78      kernel-space address or a user-space address.  */
  79   bool kernel_address = (pointer & VA_RANGE_SELECT_BIT_MASK) != 0;
  80
  81   /* Remove the top non-address bits.  */
  82   pointer &= ~mask;
  83
  84   /* Sign-extend if we have a kernel-space address.  */
  85   if (kernel_address)
  86     pointer |= mask;
  87
  88   return pointer;
  89 }
  90
  91 /* See arch/aarch64.h.  */
  92
  93 CORE_ADDR
  94 aarch64_mask_from_pac_registers (const CORE_ADDR cmask, const CORE_ADDR dmask)
  95 {
  96   /* If the masks differ, default to using the one with the most coverage.  */
  97   if (dmask != cmask)
  98     return dmask > cmask ? dmask : cmask;
  99
 100   return cmask;
 101 }