gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004, 2007, 2008
   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 (int regno)
  37 {
  38   return ((regno) >= MIPS_ZERO_REGNUM
  39           && (regno) <= gdbarch_pc_regnum (current_gdbarch));
  40 }
  41
  42 static void
  43 mipsnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)
  44 {
  45   if (regno == -1 || getregs_supplies (regno))
  46     {
  47       struct reg regs;
  48
  49       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  50                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  51         perror_with_name (_("Couldn't get registers"));
  52
  53       mipsnbsd_supply_reg (regcache, (char *) &regs, regno);
  54       if (regno != -1)
  55         return;
  56     }
  57
  58   if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  59     {
  60       struct fpreg fpregs;
  61
  62       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  63                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  64         perror_with_name (_("Couldn't get floating point status"));
  65
  66       mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);
  67     }
  68 }
  69
  70 static void
  71 mipsnbsd_store_inferior_registers (struct regcache *regcache, int regno)
  72 {
  73   if (regno == -1 || getregs_supplies (regno))
  74     {
  75       struct reg regs;
  76
  77       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  78                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  79         perror_with_name (_("Couldn't get registers"));
  80
  81       mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
  82
  83       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  84                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  85         perror_with_name (_("Couldn't write registers"));
  86
  87       if (regno != -1)
  88         return;
  89     }
  90
  91   if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  92     {
  93       struct fpreg fpregs;
  94
  95       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  96                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  97         perror_with_name (_("Couldn't get floating point status"));
  98
  99       mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
 100
 101       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 102                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 103         perror_with_name (_("Couldn't write floating point status"));
 104     }
 105 }
 106 \f
 107
 108 /* Provide a prototype to silence -Wmissing-prototypes.  */
 109 void _initialize_mipsnbsd_nat (void);
 110
 111 void
 112 _initialize_mipsnbsd_nat (void)
 113 {
 114   struct target_ops *t;
 115
 116   t = inf_ptrace_target ();
 117   t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
 118   t->to_store_registers = mipsnbsd_store_inferior_registers;
 119   add_target (t);
 120 }