gdb/shnbsd-nat.c

   1 /* Native-dependent code for SuperH running NetBSD, for GDB.
   2    Copyright 2002 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include <sys/types.h>
  23 #include <sys/ptrace.h>
  24 #include <machine/reg.h>
  25
  26 #include "defs.h"
  27 #include "inferior.h"
  28
  29 #include "shnbsd-tdep.h"
  30
  31 /* Determine if PT_GETREGS fetches this register. */
  32 #define GETREGS_SUPPLIES(regno) \
  33   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  34 || (regno) == PC_REGNUM || (regno) == PR_REGNUM \
  35 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  36 || (regno) == SR_REGNUM)
  37
  38 void
  39 fetch_inferior_registers (int regno)
  40 {
  41   if (regno == -1 || GETREGS_SUPPLIES (regno))
  42     {
  43       struct reg inferior_registers;
  44
  45       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  46                   (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
  47         perror_with_name ("Couldn't get registers");
  48
  49       shnbsd_supply_reg ((char *) &inferior_registers, regno);
  50
  51       if (regno != -1)
  52         return;
  53     }
  54 }
  55
  56 void
  57 store_inferior_registers (int regno)
  58 {
  59   if (regno == -1 || GETREGS_SUPPLIES (regno))
  60     {
  61       struct reg inferior_registers;
  62
  63       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  64                   (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
  65         perror_with_name ("Couldn't get registers");
  66
  67       shnbsd_fill_reg ((char *) &inferior_registers, regno);
  68
  69       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  70                   (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
  71         perror_with_name ("Couldn't set registers");
  72
  73       if (regno != -1)
  74         return;
  75     }
  76 }