gdb/aarch64-tdep.h

   1 /* Common target dependent code for GDB on AArch64 systems.
   2
   3    Copyright (C) 2009-2019 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
  27 /* Forward declarations.  */
  28 struct gdbarch;
  29 struct regset;
  30
  31 /* AArch64 Dwarf register numbering.  */
  32 #define AARCH64_DWARF_X0   0
  33 #define AARCH64_DWARF_SP  31
  34 #define AARCH64_DWARF_PAUTH_RA_STATE  34
  35 #define AARCH64_DWARF_PAUTH_DMASK  35
  36 #define AARCH64_DWARF_PAUTH_CMASK  36
  37 #define AARCH64_DWARF_V0  64
  38 #define AARCH64_DWARF_SVE_VG   46
  39 #define AARCH64_DWARF_SVE_FFR  47
  40 #define AARCH64_DWARF_SVE_P0   48
  41 #define AARCH64_DWARF_SVE_Z0   96
  42
  43 /* Size of integer registers.  */
  44 #define X_REGISTER_SIZE  8
  45 #define B_REGISTER_SIZE  1
  46 #define H_REGISTER_SIZE  2
  47 #define S_REGISTER_SIZE  4
  48 #define D_REGISTER_SIZE  8
  49 #define V_REGISTER_SIZE 16
  50 #define Q_REGISTER_SIZE 16
  51
  52 /* Total number of general (X) registers.  */
  53 #define AARCH64_X_REGISTER_COUNT 32
  54 /* Total number of D registers.  */
  55 #define AARCH64_D_REGISTER_COUNT 32
  56
  57 /* The maximum number of modified instructions generated for one
  58    single-stepped instruction.  */
  59 #define AARCH64_DISPLACED_MODIFIED_INSNS 1
  60
  61 /* Target-dependent structure in gdbarch.  */
  62 struct gdbarch_tdep
  63 {
  64   /* Lowest address at which instructions will appear.  */
  65   CORE_ADDR lowest_pc;
  66
  67   /* Offset to PC value in jump buffer.  If this is negative, longjmp
  68      support will be disabled.  */
  69   int jb_pc;
  70
  71   /* And the size of each entry in the buf.  */
  72   size_t jb_elt_size;
  73
  74   /* Types for AdvSISD registers.  */
  75   struct type *vnq_type;
  76   struct type *vnd_type;
  77   struct type *vns_type;
  78   struct type *vnh_type;
  79   struct type *vnb_type;
  80   struct type *vnv_type;
  81
  82   /* syscall record.  */
  83   int (*aarch64_syscall_record) (struct regcache *regcache, unsigned long svc_number);
  84
  85   /* The VQ value for SVE targets, or zero if SVE is not supported.  */
  86   uint64_t vq;
  87
  88   /* Returns true if the target supports SVE.  */
  89   bool has_sve () const
  90   {
  91     return vq != 0;
  92   }
  93
  94   int pauth_reg_base;
  95   int pauth_ra_state_regnum;
  96
  97   /* Returns true if the target supports pauth.  */
  98   bool has_pauth () const
  99   {
 100     return pauth_reg_base != -1;
 101   }
 102 };
 103
 104 const target_desc *aarch64_read_description (uint64_t vq, bool pauth_p);
 105
 106 extern int aarch64_process_record (struct gdbarch *gdbarch,
 107                                struct regcache *regcache, CORE_ADDR addr);
 108
 109 struct displaced_step_closure *
 110   aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
 111                                     CORE_ADDR from, CORE_ADDR to,
 112                                     struct regcache *regs);
 113
 114 void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
 115                                    struct displaced_step_closure *dsc,
 116                                    CORE_ADDR from, CORE_ADDR to,
 117                                    struct regcache *regs);
 118
 119 int aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
 120                                           struct displaced_step_closure *closure);
 121
 122 #endif /* aarch64-tdep.h */