gdb/shnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002-2013 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 "inf-ptrace.h"
  31 #include "regcache.h"
  32
  33
  34 /* Determine if PT_GETREGS fetches this register.  */
  35 #define GETREGS_SUPPLIES(gdbarch, regno) \
  36   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  37 || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \
  38 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  39 || (regno) == SR_REGNUM)
  40
  41 /* Sizeof `struct reg' in <machine/reg.h>.  */
  42 #define SHNBSD_SIZEOF_GREGS     (21 * 4)
  43
  44 static void
  45 shnbsd_fetch_inferior_registers (struct target_ops *ops,
  46                                  struct regcache *regcache, int regno)
  47 {
  48   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  49     {
  50       struct reg inferior_registers;
  51
  52       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  53                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  54         perror_with_name (_("Couldn't get registers"));
  55
  56       sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno,
  57                                  (char *) &inferior_registers,
  58                                  SHNBSD_SIZEOF_GREGS);
  59
  60       if (regno != -1)
  61         return;
  62     }
  63 }
  64
  65 static void
  66 shnbsd_store_inferior_registers (struct target_ops *ops,
  67                                  struct regcache *regcache, int regno)
  68 {
  69   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  70     {
  71       struct reg inferior_registers;
  72
  73       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  74                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  75         perror_with_name (_("Couldn't get registers"));
  76
  77       sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno,
  78                                   (char *) &inferior_registers,
  79                                   SHNBSD_SIZEOF_GREGS);
  80
  81       if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
  82                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  83         perror_with_name (_("Couldn't set registers"));
  84
  85       if (regno != -1)
  86         return;
  87     }
  88 }
  89
  90 /* Provide a prototype to silence -Wmissing-prototypes.  */
  91 void _initialize_shnbsd_nat (void);
  92
  93 void
  94 _initialize_shnbsd_nat (void)
  95 {
  96   struct target_ops *t;
  97
  98   t = inf_ptrace_target ();
  99   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
 100   t->to_store_registers = shnbsd_store_inferior_registers;
 101   add_target (t);
 102 }