gdb/arch/aarch64.c

   1 /* Copyright (C) 2017-2024 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 #include "aarch64.h"
  19 #include <stdlib.h>
  20
  21 #include "../features/aarch64-core.c"
  22 #include "../features/aarch64-fpu.c"
  23 #include "../features/aarch64-sve.c"
  24 #include "../features/aarch64-pauth.c"
  25 #include "../features/aarch64-mte.c"
  26 #include "../features/aarch64-sme.c"
  27 #include "../features/aarch64-sme2.c"
  28 #include "../features/aarch64-tls.c"
  29
  30 /* See arch/aarch64.h.  */
  31
  32 target_desc *
  33 aarch64_create_target_description (const aarch64_features &features)
  34 {
  35   target_desc_up tdesc = allocate_target_description ();
  36
  37 #ifndef IN_PROCESS_AGENT
  38   set_tdesc_architecture (tdesc.get (), "aarch64");
  39 #endif
  40
  41   long regnum = 0;
  42
  43   regnum = create_feature_aarch64_core (tdesc.get (), regnum);
  44
  45   if (features.vq == 0)
  46     regnum = create_feature_aarch64_fpu (tdesc.get (), regnum);
  47   else
  48     regnum = create_feature_aarch64_sve (tdesc.get (), regnum, features.vq);
  49
  50   if (features.pauth)
  51     regnum = create_feature_aarch64_pauth (tdesc.get (), regnum);
  52
  53   /* Memory tagging extension registers.  */
  54   if (features.mte)
  55     regnum = create_feature_aarch64_mte (tdesc.get (), regnum);
  56
  57   /* TLS registers.  */
  58   if (features.tls > 0)
  59     regnum = create_feature_aarch64_tls (tdesc.get (), regnum, features.tls);
  60
  61   if (features.svq)
  62     regnum = create_feature_aarch64_sme (tdesc.get (), regnum,
  63                                          sve_vl_from_vq (features.svq));
  64
  65   if (features.sme2)
  66     regnum = create_feature_aarch64_sme2 (tdesc.get (), regnum);
  67
  68   return tdesc.release ();
  69 }
  70
  71 /* See arch/aarch64.h.  */
  72
  73 CORE_ADDR
  74 aarch64_remove_top_bits (CORE_ADDR pointer, CORE_ADDR mask)
  75 {
  76   /* The VA range select bit is 55.  This bit tells us if we have a
  77      kernel-space address or a user-space address.  */
  78   bool kernel_address = (pointer & VA_RANGE_SELECT_BIT_MASK) != 0;
  79
  80   /* Remove the top non-address bits.  */
  81   pointer &= ~mask;
  82
  83   /* Sign-extend if we have a kernel-space address.  */
  84   if (kernel_address)
  85     pointer |= mask;
  86
  87   return pointer;
  88 }
  89
  90 /* See arch/aarch64.h.  */
  91
  92 CORE_ADDR
  93 aarch64_mask_from_pac_registers (const CORE_ADDR cmask, const CORE_ADDR dmask)
  94 {
  95   /* If the masks differ, default to using the one with the most coverage.  */
  96   if (dmask != cmask)
  97     return dmask > cmask ? dmask : cmask;
  98
  99   return cmask;
 100 }