gdb/shnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002, 2003, 2004, 2006, 2007 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 "defs.h"
  23 #include "inferior.h"
  24
  25 #include <sys/types.h>
  26 #include <sys/ptrace.h>
  27 #include <machine/reg.h>
  28
  29 #include "sh-tdep.h"
  30 #include "shnbsd-tdep.h"
  31 #include "inf-ptrace.h"
  32 #include "regcache.h"
  33
  34
  35 /* Determine if PT_GETREGS fetches this register. */
  36 #define GETREGS_SUPPLIES(regno) \
  37   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  38 || (regno) == gdbarch_pc_regnum (current_gdbarch) || (regno) == PR_REGNUM \
  39 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  40 || (regno) == SR_REGNUM)
  41
  42 static void
  43 shnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)
  44 {
  45   if (regno == -1 || GETREGS_SUPPLIES (regno))
  46     {
  47       struct reg inferior_registers;
  48
  49       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  50                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  51         perror_with_name (_("Couldn't get registers"));
  52
  53       shnbsd_supply_reg (regcache, (char *) &inferior_registers, regno);
  54
  55       if (regno != -1)
  56         return;
  57     }
  58 }
  59
  60 static void
  61 shnbsd_store_inferior_registers (struct regcache *regcache, int regno)
  62 {
  63   if (regno == -1 || GETREGS_SUPPLIES (regno))
  64     {
  65       struct reg inferior_registers;
  66
  67       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  68                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  69         perror_with_name (_("Couldn't get registers"));
  70
  71       shnbsd_fill_reg (regcache, (char *) &inferior_registers, regno);
  72
  73       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  74                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  75         perror_with_name (_("Couldn't set registers"));
  76
  77       if (regno != -1)
  78         return;
  79     }
  80 }
  81
  82 /* Provide a prototype to silence -Wmissing-prototypes.  */
  83 void _initialize_shnbsd_nat (void);
  84
  85 void
  86 _initialize_shnbsd_nat (void)
  87 {
  88   struct target_ops *t;
  89
  90   t = inf_ptrace_target ();
  91   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
  92   t->to_store_registers = shnbsd_store_inferior_registers;
  93   add_target (t);
  94 }