gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "inferior.h"
  23 #include "regcache.h"
  24 #include "target.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/ptrace.h>
  28 #include <machine/reg.h>
  29
  30 #include "mips-tdep.h"
  31 #include "mipsnbsd-tdep.h"
  32 #include "inf-ptrace.h"
  33
  34 /* Determine if PT_GETREGS fetches this register.  */
  35 static int
  36 getregs_supplies (struct gdbarch *gdbarch, int regno)
  37 {
  38   return ((regno) >= MIPS_ZERO_REGNUM
  39           && (regno) <= gdbarch_pc_regnum (gdbarch));
  40 }
  41
  42 static void
  43 mipsnbsd_fetch_inferior_registers (struct target_ops *ops,
  44                                    struct regcache *regcache, int regno)
  45 {
  46   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  47   if (regno == -1 || getregs_supplies (gdbarch, regno))
  48     {
  49       struct reg regs;
  50
  51       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  52                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  53         perror_with_name (_("Couldn't get registers"));
  54
  55       mipsnbsd_supply_reg (regcache, (char *) &regs, regno);
  56       if (regno != -1)
  57         return;
  58     }
  59
  60   if (regno == -1
  61       || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  62     {
  63       struct fpreg fpregs;
  64
  65       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  66                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  67         perror_with_name (_("Couldn't get floating point status"));
  68
  69       mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);
  70     }
  71 }
  72
  73 static void
  74 mipsnbsd_store_inferior_registers (struct target_ops *ops,
  75                                    struct regcache *regcache, int regno)
  76 {
  77   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  78   if (regno == -1 || getregs_supplies (gdbarch, regno))
  79     {
  80       struct reg regs;
  81
  82       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  83                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  84         perror_with_name (_("Couldn't get registers"));
  85
  86       mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
  87
  88       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  89                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  90         perror_with_name (_("Couldn't write registers"));
  91
  92       if (regno != -1)
  93         return;
  94     }
  95
  96   if (regno == -1
  97       || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  98     {
  99       struct fpreg fpregs;
 100
 101       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 102                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 103         perror_with_name (_("Couldn't get floating point status"));
 104
 105       mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
 106
 107       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 108                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 109         perror_with_name (_("Couldn't write floating point status"));
 110     }
 111 }
 112 \f
 113
 114 /* Provide a prototype to silence -Wmissing-prototypes.  */
 115 void _initialize_mipsnbsd_nat (void);
 116
 117 void
 118 _initialize_mipsnbsd_nat (void)
 119 {
 120   struct target_ops *t;
 121
 122   t = inf_ptrace_target ();
 123   t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
 124   t->to_store_registers = mipsnbsd_store_inferior_registers;
 125   add_target (t);
 126 }