gdb/shnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002, 2003, 2004, 2006, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    Contributed by Wasabi Systems, Inc.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "inferior.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/ptrace.h>
  28 #include <machine/reg.h>
  29
  30 #include "sh-tdep.h"
  31 #include "shnbsd-tdep.h"
  32 #include "inf-ptrace.h"
  33 #include "regcache.h"
  34
  35
  36 /* Determine if PT_GETREGS fetches this register. */
  37 #define GETREGS_SUPPLIES(gdbarch, regno) \
  38   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  39 || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \
  40 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  41 || (regno) == SR_REGNUM)
  42
  43 static void
  44 shnbsd_fetch_inferior_registers (struct target_ops *ops,
  45                                  struct regcache *regcache, int regno)
  46 {
  47   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  48     {
  49       struct reg inferior_registers;
  50
  51       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  52                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  53         perror_with_name (_("Couldn't get registers"));
  54
  55       shnbsd_supply_reg (regcache, (char *) &inferior_registers, regno);
  56
  57       if (regno != -1)
  58         return;
  59     }
  60 }
  61
  62 static void
  63 shnbsd_store_inferior_registers (struct target_ops *ops,
  64                                  struct regcache *regcache, int regno)
  65 {
  66   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  67     {
  68       struct reg inferior_registers;
  69
  70       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  71                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  72         perror_with_name (_("Couldn't get registers"));
  73
  74       shnbsd_fill_reg (regcache, (char *) &inferior_registers, regno);
  75
  76       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  77                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  78         perror_with_name (_("Couldn't set registers"));
  79
  80       if (regno != -1)
  81         return;
  82     }
  83 }
  84
  85 /* Provide a prototype to silence -Wmissing-prototypes.  */
  86 void _initialize_shnbsd_nat (void);
  87
  88 void
  89 _initialize_shnbsd_nat (void)
  90 {
  91   struct target_ops *t;
  92
  93   t = inf_ptrace_target ();
  94   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
  95   t->to_store_registers = shnbsd_store_inferior_registers;
  96   add_target (t);
  97 }