gdbserver/netbsd-aarch64-low.cc

   1 /* Copyright (C) 2020-2024 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 <sys/types.h>
  19 #include <sys/ptrace.h>
  20 #include <limits.h>
  21
  22 #include "netbsd-low.h"
  23 #include "arch/aarch64.h"
  24 #include "arch/aarch64-insn.h"
  25 #include "tdesc.h"
  26
  27 /* The fill_function for the general-purpose register set.  */
  28
  29 static void
  30 netbsd_aarch64_fill_gregset (struct regcache *regcache, char *buf)
  31 {
  32   struct reg *r = (struct reg *) buf;
  33
  34 #define netbsd_aarch64_collect_gp(regnum, fld) do {             \
  35     collect_register (regcache, regnum, &r->fld);               \
  36   } while (0)
  37
  38   for (size_t i = 0; i < ARRAY_SIZE (r->r_reg); i++)
  39     netbsd_aarch64_collect_gp (AARCH64_X0_REGNUM + i, r_reg[i]);
  40
  41   netbsd_aarch64_collect_gp (AARCH64_SP_REGNUM, r_sp);
  42   netbsd_aarch64_collect_gp (AARCH64_PC_REGNUM, r_pc);
  43 }
  44
  45 /* The store_function for the general-purpose register set.  */
  46
  47 static void
  48 netbsd_aarch64_store_gregset (struct regcache *regcache, const char *buf)
  49 {
  50   struct reg *r = (struct reg *) buf;
  51
  52 #define netbsd_aarch64_supply_gp(regnum, fld) do {              \
  53     supply_register (regcache, regnum, &r->fld);                \
  54   } while(0)
  55
  56   for (size_t i = 0; i < ARRAY_SIZE (r->r_reg); i++)
  57     netbsd_aarch64_supply_gp (AARCH64_X0_REGNUM + i, r_reg[i]);
  58
  59   netbsd_aarch64_supply_gp (AARCH64_SP_REGNUM, r_sp);
  60   netbsd_aarch64_supply_gp (AARCH64_PC_REGNUM, r_pc);
  61 }
  62
  63 /* Description of all the aarch64-netbsd register sets.  */
  64
  65 static const struct netbsd_regset_info netbsd_target_regsets[] =
  66 {
  67   /* General Purpose Registers.  */
  68   {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
  69   netbsd_aarch64_fill_gregset, netbsd_aarch64_store_gregset},
  70   /* End of list marker.  */
  71   {0, 0, -1, NULL, NULL }
  72 };
  73
  74 /* NetBSD target op definitions for the aarch64 architecture.  */
  75
  76 class netbsd_aarch64_target : public netbsd_process_target
  77 {
  78 protected:
  79   const netbsd_regset_info *get_regs_info () override;
  80
  81   void low_arch_setup () override;
  82 };
  83
  84 /* Return the information to access registers.  */
  85
  86 const netbsd_regset_info *
  87 netbsd_aarch64_target::get_regs_info ()
  88 {
  89   return netbsd_target_regsets;
  90 }
  91
  92 /* Architecture-specific setup for the current process.  */
  93
  94 void
  95 netbsd_aarch64_target::low_arch_setup ()
  96 {
  97   target_desc *tdesc
  98     = aarch64_create_target_description ({});
  99
 100   static const char *expedite_regs_aarch64[] = { "x29", "sp", "pc", NULL };
 101   init_target_desc (tdesc, expedite_regs_aarch64, GDB_OSABI_NETBSD);
 102
 103   current_process ()->tdesc = tdesc;
 104 }
 105
 106 /* The singleton target ops object.  */
 107
 108 static netbsd_aarch64_target the_netbsd_aarch64_target;
 109
 110 /* The NetBSD target ops object.  */
 111
 112 netbsd_process_target *the_netbsd_target = &the_netbsd_aarch64_target;