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-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   return tdesc.release ();
  66 }
  67
  68 /* See arch/aarch64.h.  */
  69
  70 CORE_ADDR
  71 aarch64_remove_top_bits (CORE_ADDR pointer, CORE_ADDR mask)
  72 {
  73   /* The VA range select bit is 55.  This bit tells us if we have a
  74      kernel-space address or a user-space address.  */
  75   bool kernel_address = (pointer & VA_RANGE_SELECT_BIT_MASK) != 0;
  76
  77   /* Remove the top non-address bits.  */
  78   pointer &= ~mask;
  79
  80   /* Sign-extend if we have a kernel-space address.  */
  81   if (kernel_address)
  82     pointer |= mask;
  83
  84   return pointer;
  85 }
  86
  87 /* See arch/aarch64.h.  */
  88
  89 CORE_ADDR
  90 aarch64_mask_from_pac_registers (const CORE_ADDR cmask, const CORE_ADDR dmask)
  91 {
  92   /* If the masks differ, default to using the one with the most coverage.  */
  93   if (dmask != cmask)
  94     return dmask > cmask ? dmask : cmask;
  95
  96   return cmask;
  97 }