gdb/aarch64-tdep.h

   1 /* Common target dependent code for GDB on AArch64 systems.
   2
   3    Copyright (C) 2009-2021 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
  29 /* Forward declarations.  */
  30 struct gdbarch;
  31 struct regset;
  32
  33 /* AArch64 Dwarf register numbering.  */
  34 #define AARCH64_DWARF_X0   0
  35 #define AARCH64_DWARF_SP  31
  36 #define AARCH64_DWARF_PAUTH_RA_STATE  34
  37 #define AARCH64_DWARF_PAUTH_DMASK  35
  38 #define AARCH64_DWARF_PAUTH_CMASK  36
  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 gdbarch_tdep
  64 {
  65   /* Lowest address at which instructions will appear.  */
  66   CORE_ADDR lowest_pc;
  67
  68   /* Offset to PC value in jump buffer.  If this is negative, longjmp
  69      support will be disabled.  */
  70   int jb_pc;
  71
  72   /* And the size of each entry in the buf.  */
  73   size_t jb_elt_size;
  74
  75   /* Types for AdvSISD registers.  */
  76   struct type *vnq_type;
  77   struct type *vnd_type;
  78   struct type *vns_type;
  79   struct type *vnh_type;
  80   struct type *vnb_type;
  81   struct type *vnv_type;
  82
  83   /* syscall record.  */
  84   int (*aarch64_syscall_record) (struct regcache *regcache, unsigned long svc_number);
  85
  86   /* The VQ value for SVE targets, or zero if SVE is not supported.  */
  87   uint64_t vq;
  88
  89   /* Returns true if the target supports SVE.  */
  90   bool has_sve () const
  91   {
  92     return vq != 0;
  93   }
  94
  95   int pauth_reg_base;
  96   int pauth_ra_state_regnum;
  97
  98   /* Returns true if the target supports pauth.  */
  99   bool has_pauth () const
 100   {
 101     return pauth_reg_base != -1;
 102   }
 103
 104   /* First MTE register.  This is -1 if no MTE registers are available.  */
 105   int mte_reg_base;
 106
 107   /* Returns true if the target supports MTE.  */
 108   bool has_mte () const
 109   {
 110     return mte_reg_base != -1;
 111   }
 112 };
 113
 114 const target_desc *aarch64_read_description (uint64_t vq, bool pauth_p,
 115                                              bool mte_p);
 116
 117 extern int aarch64_process_record (struct gdbarch *gdbarch,
 118                                struct regcache *regcache, CORE_ADDR addr);
 119
 120 displaced_step_copy_insn_closure_up
 121   aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
 122                                     CORE_ADDR from, CORE_ADDR to,
 123                                     struct regcache *regs);
 124
 125 void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
 126                                    displaced_step_copy_insn_closure *dsc,
 127                                    CORE_ADDR from, CORE_ADDR to,
 128                                    struct regcache *regs);
 129
 130 bool aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch);
 131
 132 #endif /* aarch64-tdep.h */