gdb/sh-netbsd-nat.c

   1 /* Native-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002-2024 Free Software Foundation, Inc.
   4
   5    Contributed by Wasabi Systems, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "inferior.h"
  23
  24 #include <sys/types.h>
  25 #include <sys/ptrace.h>
  26 #include <machine/reg.h>
  27
  28 #include "sh-tdep.h"
  29 #include "inf-ptrace.h"
  30 #include "netbsd-nat.h"
  31 #include "regcache.h"
  32
  33 struct sh_nbsd_nat_target final : public nbsd_nat_target
  34 {
  35   void fetch_registers (struct regcache *, int) override;
  36   void store_registers (struct regcache *, int) override;
  37 };
  38
  39 static sh_nbsd_nat_target the_sh_nbsd_nat_target;
  40
  41 /* Determine if PT_GETREGS fetches this register.  */
  42 #define GETREGS_SUPPLIES(gdbarch, regno) \
  43   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  44 || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \
  45 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  46 || (regno) == SR_REGNUM)
  47
  48 /* Sizeof `struct reg' in <machine/reg.h>.  */
  49 #define SHNBSD_SIZEOF_GREGS     (21 * 4)
  50
  51 void
  52 sh_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regno)
  53 {
  54   pid_t pid = regcache->ptid ().pid ();
  55   int lwp = regcache->ptid ().lwp ();
  56
  57   if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno))
  58     {
  59       struct reg inferior_registers;
  60
  61       if (ptrace (PT_GETREGS, pid,
  62                   (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
  63         perror_with_name (_("Couldn't get registers"));
  64
  65       sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno,
  66                                  (char *) &inferior_registers,
  67                                  SHNBSD_SIZEOF_GREGS);
  68
  69       if (regno != -1)
  70         return;
  71     }
  72 }
  73
  74 void
  75 sh_nbsd_nat_target::store_registers (struct regcache *regcache, int regno)
  76 {
  77   pid_t pid = regcache->ptid ().pid ();
  78   int lwp = regcache->ptid ().lwp ();
  79
  80   if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno))
  81     {
  82       struct reg inferior_registers;
  83
  84       if (ptrace (PT_GETREGS, pid,
  85                   (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
  86         perror_with_name (_("Couldn't get registers"));
  87
  88       sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno,
  89                                   (char *) &inferior_registers,
  90                                   SHNBSD_SIZEOF_GREGS);
  91
  92       if (ptrace (PT_SETREGS, pid,
  93                   (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
  94         perror_with_name (_("Couldn't set registers"));
  95
  96       if (regno != -1)
  97         return;
  98     }
  99 }
 100
 101 void _initialize_shnbsd_nat ();
 102 void
 103 _initialize_shnbsd_nat ()
 104 {
 105   add_inf_child_target (&the_sh_nbsd_nat_target);
 106 }