gdb/aarch64-tdep.h

   1 /* Common target dependent code for GDB on AArch64 systems.
   2
   3    Copyright (C) 2009-2016 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 /* Forward declarations.  */
  26 struct gdbarch;
  27 struct regset;
  28
  29 /* AArch64 Dwarf register numbering.  */
  30 #define AARCH64_DWARF_X0   0
  31 #define AARCH64_DWARF_SP  31
  32 #define AARCH64_DWARF_V0  64
  33
  34 /* Register numbers of various important registers.  */
  35 enum aarch64_regnum
  36 {
  37   AARCH64_X0_REGNUM,            /* First integer register */
  38
  39   /* Frame register in AArch64 code, if used.  */
  40   AARCH64_FP_REGNUM = AARCH64_X0_REGNUM + 29,
  41   AARCH64_LR_REGNUM = AARCH64_X0_REGNUM + 30,   /* Return address */
  42   AARCH64_SP_REGNUM,            /* Stack pointer */
  43   AARCH64_PC_REGNUM,            /* Program counter */
  44   AARCH64_CPSR_REGNUM,          /* Contains status register */
  45   AARCH64_V0_REGNUM,            /* First floating point / vector register */
  46
  47   /* Last floating point / vector register */
  48   AARCH64_V31_REGNUM = AARCH64_V0_REGNUM + 31,
  49   AARCH64_FPSR_REGNUM,          /* Floating point status register */
  50   AARCH64_FPCR_REGNUM,          /* Floating point control register */
  51
  52   /* Other useful registers.  */
  53
  54   /* Last integer-like argument */
  55   AARCH64_LAST_X_ARG_REGNUM = AARCH64_X0_REGNUM + 7,
  56   AARCH64_STRUCT_RETURN_REGNUM = AARCH64_X0_REGNUM + 8,
  57   AARCH64_LAST_V_ARG_REGNUM = AARCH64_V0_REGNUM + 7
  58 };
  59
  60 /* Size of integer registers.  */
  61 #define X_REGISTER_SIZE  8
  62 #define B_REGISTER_SIZE  1
  63 #define H_REGISTER_SIZE  2
  64 #define S_REGISTER_SIZE  4
  65 #define D_REGISTER_SIZE  8
  66 #define V_REGISTER_SIZE 16
  67 #define Q_REGISTER_SIZE 16
  68
  69 /* Total number of general (X) registers.  */
  70 #define AARCH64_X_REGISTER_COUNT 32
  71 /* Total number of D registers.  */
  72 #define AARCH64_D_REGISTER_COUNT 32
  73
  74 /* The maximum number of modified instructions generated for one
  75    single-stepped instruction.  */
  76 #define DISPLACED_MODIFIED_INSNS 1
  77
  78 /* Target-dependent structure in gdbarch.  */
  79 struct gdbarch_tdep
  80 {
  81   /* Lowest address at which instructions will appear.  */
  82   CORE_ADDR lowest_pc;
  83
  84   /* Offset to PC value in jump buffer.  If this is negative, longjmp
  85      support will be disabled.  */
  86   int jb_pc;
  87
  88   /* And the size of each entry in the buf.  */
  89   size_t jb_elt_size;
  90
  91   /* Types for AdvSISD registers.  */
  92   struct type *vnq_type;
  93   struct type *vnd_type;
  94   struct type *vns_type;
  95   struct type *vnh_type;
  96   struct type *vnb_type;
  97
  98   /* syscall record.  */
  99   int (*aarch64_syscall_record) (struct regcache *regcache, unsigned long svc_number);
 100 };
 101
 102 extern struct target_desc *tdesc_aarch64;
 103
 104 extern int aarch64_process_record (struct gdbarch *gdbarch,
 105                                struct regcache *regcache, CORE_ADDR addr);
 106
 107 struct displaced_step_closure *
 108   aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
 109                                     CORE_ADDR from, CORE_ADDR to,
 110                                     struct regcache *regs);
 111
 112 void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
 113                                    struct displaced_step_closure *dsc,
 114                                    CORE_ADDR from, CORE_ADDR to,
 115                                    struct regcache *regs);
 116
 117 int aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
 118                                           struct displaced_step_closure *closure);
 119
 120 #endif /* aarch64-tdep.h */