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 2 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, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, USA.  */
  23
  24 #include "defs.h"
  25 #include "inferior.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 #include "sh-tdep.h"
  32 #include "shnbsd-tdep.h"
  33 #include "inf-ptrace.h"
  34 #include "regcache.h"
  35
  36
  37 /* Determine if PT_GETREGS fetches this register. */
  38 #define GETREGS_SUPPLIES(regno) \
  39   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
  40 || (regno) == PC_REGNUM || (regno) == PR_REGNUM \
  41 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
  42 || (regno) == SR_REGNUM)
  43
  44 static void
  45 shnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)
  46 {
  47   if (regno == -1 || GETREGS_SUPPLIES (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 regcache *regcache, int regno)
  64 {
  65   if (regno == -1 || GETREGS_SUPPLIES (regno))
  66     {
  67       struct reg inferior_registers;
  68
  69       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  70                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  71         perror_with_name (_("Couldn't get registers"));
  72
  73       shnbsd_fill_reg (regcache, (char *) &inferior_registers, regno);
  74
  75       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  76                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
  77         perror_with_name (_("Couldn't set registers"));
  78
  79       if (regno != -1)
  80         return;
  81     }
  82 }
  83
  84 /* Provide a prototype to silence -Wmissing-prototypes.  */
  85 void _initialize_shnbsd_nat (void);
  86
  87 void
  88 _initialize_shnbsd_nat (void)
  89 {
  90   struct target_ops *t;
  91
  92   t = inf_ptrace_target ();
  93   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
  94   t->to_store_registers = shnbsd_store_inferior_registers;
  95   add_target (t);
  96 }