gdb/shnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sh.
   2
   3    Copyright (C) 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010
   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 "inf-ptrace.h"
  32 #include "regcache.h"
  33
  34
  35 /* Determine if PT_GETREGS fetches this register. */
  36 #define GETREGS_SUPPLIES(gdbarch, regno) \
  37   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  38 || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \
  39 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  40 || (regno) == SR_REGNUM)
  41
  42 /* Sizeof `struct reg' in <machine/reg.h>.  */
  43 #define SHNBSD_SIZEOF_GREGS     (21 * 4)
  44
  45 static void
  46 shnbsd_fetch_inferior_registers (struct target_ops *ops,
  47                                  struct regcache *regcache, int regno)
  48 {
  49   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  50     {
  51       struct reg inferior_registers;
  52
  53       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  54                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  55         perror_with_name (_("Couldn't get registers"));
  56
  57       sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno,
  58                                  (char *) &inferior_registers,
  59                                  SHNBSD_SIZEOF_GREGS);
  60
  61       if (regno != -1)
  62         return;
  63     }
  64 }
  65
  66 static void
  67 shnbsd_store_inferior_registers (struct target_ops *ops,
  68                                  struct regcache *regcache, int regno)
  69 {
  70   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
  71     {
  72       struct reg inferior_registers;
  73
  74       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  75                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  76         perror_with_name (_("Couldn't get registers"));
  77
  78       sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno,
  79                                   (char *) &inferior_registers,
  80                                   SHNBSD_SIZEOF_GREGS);
  81
  82       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  83                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  84         perror_with_name (_("Couldn't set registers"));
  85
  86       if (regno != -1)
  87         return;
  88     }
  89 }
  90
  91 /* Provide a prototype to silence -Wmissing-prototypes.  */
  92 void _initialize_shnbsd_nat (void);
  93
  94 void
  95 _initialize_shnbsd_nat (void)
  96 {
  97   struct target_ops *t;
  98
  99   t = inf_ptrace_target ();
 100   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
 101   t->to_store_registers = shnbsd_store_inferior_registers;
 102   add_target (t);
 103 }