gdb/mipsnbsd-nat.c

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