gdb/aarch64-tdep.h

   1 /* Common target dependent code for GDB on AArch64 systems.
   2
   3    Copyright (C) 2009-2022 Free Software Foundation, Inc.
   4    Contributed by ARM Ltd.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #ifndef AARCH64_TDEP_H
  23 #define AARCH64_TDEP_H
  24
  25 #include "arch/aarch64.h"
  26 #include "displaced-stepping.h"
  27 #include "infrun.h"
  28 #include "gdbarch.h"
  29
  30 /* Forward declarations.  */
  31 struct gdbarch;
  32 struct regset;
  33
  34 /* AArch64 Dwarf register numbering.  */
  35 #define AARCH64_DWARF_X0   0
  36 #define AARCH64_DWARF_SP  31
  37 #define AARCH64_DWARF_PC  32
  38 #define AARCH64_DWARF_RA_SIGN_STATE  34
  39 #define AARCH64_DWARF_V0  64
  40 #define AARCH64_DWARF_SVE_VG   46
  41 #define AARCH64_DWARF_SVE_FFR  47
  42 #define AARCH64_DWARF_SVE_P0   48
  43 #define AARCH64_DWARF_SVE_Z0   96
  44
  45 /* Size of integer registers.  */
  46 #define X_REGISTER_SIZE  8
  47 #define B_REGISTER_SIZE  1
  48 #define H_REGISTER_SIZE  2
  49 #define S_REGISTER_SIZE  4
  50 #define D_REGISTER_SIZE  8
  51 #define Q_REGISTER_SIZE 16
  52
  53 /* Total number of general (X) registers.  */
  54 #define AARCH64_X_REGISTER_COUNT 32
  55 /* Total number of D registers.  */
  56 #define AARCH64_D_REGISTER_COUNT 32
  57
  58 /* The maximum number of modified instructions generated for one
  59    single-stepped instruction.  */
  60 #define AARCH64_DISPLACED_MODIFIED_INSNS 1
  61
  62 /* Target-dependent structure in gdbarch.  */
  63 struct aarch64_gdbarch_tdep : gdbarch_tdep
  64 {
  65   /* Lowest address at which instructions will appear.  */
  66   CORE_ADDR lowest_pc = 0;
  67
  68   /* Offset to PC value in jump buffer.  If this is negative, longjmp
  69      support will be disabled.  */
  70   int jb_pc = 0;
  71
  72   /* And the size of each entry in the buf.  */
  73   size_t jb_elt_size = 0;
  74
  75   /* Types for AdvSISD registers.  */
  76   struct type *vnq_type = nullptr;
  77   struct type *vnd_type = nullptr;
  78   struct type *vns_type = nullptr;
  79   struct type *vnh_type = nullptr;
  80   struct type *vnb_type = nullptr;
  81   struct type *vnv_type = nullptr;
  82
  83   /* syscall record.  */
  84   int (*aarch64_syscall_record) (struct regcache *regcache,
  85                                  unsigned long svc_number) = nullptr;
  86
  87   /* The VQ value for SVE targets, or zero if SVE is not supported.  */
  88   uint64_t vq = 0;
  89
  90   /* Returns true if the target supports SVE.  */
  91   bool has_sve () const
  92   {
  93     return vq != 0;
  94   }
  95
  96   int pauth_reg_base = 0;
  97   int ra_sign_state_regnum = 0;
  98
  99   /* Returns true if the target supports pauth.  */
 100   bool has_pauth () const
 101   {
 102     return pauth_reg_base != -1;
 103   }
 104
 105   /* First MTE register.  This is -1 if no MTE registers are available.  */
 106   int mte_reg_base = 0;
 107
 108   /* Returns true if the target supports MTE.  */
 109   bool has_mte () const
 110   {
 111     return mte_reg_base != -1;
 112   }
 113
 114   /* TLS register.  This is -1 if the TLS register is not available.  */
 115   int tls_regnum = 0;
 116
 117   bool has_tls() const
 118   {
 119     return tls_regnum != -1;
 120   }
 121 };
 122
 123 const target_desc *aarch64_read_description (const aarch64_features &features);
 124
 125 extern int aarch64_process_record (struct gdbarch *gdbarch,
 126                                struct regcache *regcache, CORE_ADDR addr);
 127
 128 displaced_step_copy_insn_closure_up
 129   aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
 130                                     CORE_ADDR from, CORE_ADDR to,
 131                                     struct regcache *regs);
 132
 133 void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
 134                                    displaced_step_copy_insn_closure *dsc,
 135                                    CORE_ADDR from, CORE_ADDR to,
 136                                    struct regcache *regs);
 137
 138 bool aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch);
 139
 140 #endif /* aarch64-tdep.h */