gdb/shnbsd-nat.c

   1 /* Native-dependent code for SuperH running NetBSD, for GDB.
   2
   3    Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   4    Contributed by Wasabi Systems, Inc.
   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 2 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, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #include <sys/types.h>
  24 #include <sys/ptrace.h>
  25 #include <machine/reg.h>
  26
  27 #include "defs.h"
  28 #include "inferior.h"
  29
  30 #include "sh-tdep.h"
  31 #include "shnbsd-tdep.h"
  32
  33 /* Determine if PT_GETREGS fetches this register. */
  34 #define GETREGS_SUPPLIES(regno) \
  35   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  36 || (regno) == PC_REGNUM || (regno) == PR_REGNUM \
  37 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  38 || (regno) == SR_REGNUM)
  39
  40 void
  41 fetch_inferior_registers (int regno)
  42 {
  43   if (regno == -1 || GETREGS_SUPPLIES (regno))
  44     {
  45       struct reg inferior_registers;
  46
  47       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  48                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  49         perror_with_name (_("Couldn't get registers"));
  50
  51       shnbsd_supply_reg ((char *) &inferior_registers, regno);
  52
  53       if (regno != -1)
  54         return;
  55     }
  56 }
  57
  58 void
  59 store_inferior_registers (int regno)
  60 {
  61   if (regno == -1 || GETREGS_SUPPLIES (regno))
  62     {
  63       struct reg inferior_registers;
  64
  65       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  66                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  67         perror_with_name (_("Couldn't get registers"));
  68
  69       shnbsd_fill_reg ((char *) &inferior_registers, regno);
  70
  71       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  72                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  73         perror_with_name (_("Couldn't set registers"));
  74
  75       if (regno != -1)
  76         return;
  77     }
  78 }