gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004, 2007, 2008, 2009
   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 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  61     {
  62       struct fpreg fpregs;
  63
  64       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  65                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  66         perror_with_name (_("Couldn't get floating point status"));
  67
  68       mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);
  69     }
  70 }
  71
  72 static void
  73 mipsnbsd_store_inferior_registers (struct target_ops *ops,
  74                                    struct regcache *regcache, int regno)
  75 {
  76   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  77   if (regno == -1 || getregs_supplies (gdbarch, regno))
  78     {
  79       struct reg regs;
  80
  81       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  82                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  83         perror_with_name (_("Couldn't get registers"));
  84
  85       mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
  86
  87       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  88                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  89         perror_with_name (_("Couldn't write registers"));
  90
  91       if (regno != -1)
  92         return;
  93     }
  94
  95   if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  96     {
  97       struct fpreg fpregs;
  98
  99       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 100                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 101         perror_with_name (_("Couldn't get floating point status"));
 102
 103       mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
 104
 105       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 106                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 107         perror_with_name (_("Couldn't write floating point status"));
 108     }
 109 }
 110 \f
 111
 112 /* Provide a prototype to silence -Wmissing-prototypes.  */
 113 void _initialize_mipsnbsd_nat (void);
 114
 115 void
 116 _initialize_mipsnbsd_nat (void)
 117 {
 118   struct target_ops *t;
 119
 120   t = inf_ptrace_target ();
 121   t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
 122   t->to_store_registers = mipsnbsd_store_inferior_registers;
 123   add_target (t);
 124 }