gnu/dist/gdb6/gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004 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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "defs.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25 #include "target.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 #include "nbsd-nat.h"
  32 #include "mips-tdep.h"
  33 #include "mipsnbsd-tdep.h"
  34 #include "inf-ptrace.h"
  35
  36 /* Determine if PT_GETREGS fetches this register.  */
  37 static int
  38 getregs_supplies (int regno)
  39 {
  40   return ((regno) >= MIPS_ZERO_REGNUM && (regno) <= PC_REGNUM);
  41 }
  42
  43 static void
  44 mipsnbsd_fetch_inferior_registers (int regno)
  45 {
  46   if (regno == -1 || getregs_supplies (regno))
  47     {
  48       struct reg regs;
  49
  50       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  51                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  52         perror_with_name (_("Couldn't get registers"));
  53
  54       mipsnbsd_supply_reg ((char *) &regs, regno);
  55       if (regno != -1)
  56         return;
  57     }
  58
  59   if (regno == -1 || regno >= FP0_REGNUM)
  60     {
  61       struct fpreg fpregs;
  62
  63       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  64                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  65         perror_with_name (_("Couldn't get floating point status"));
  66
  67       mipsnbsd_supply_fpreg ((char *) &fpregs, regno);
  68     }
  69 }
  70
  71 static void
  72 mipsnbsd_store_inferior_registers (int regno)
  73 {
  74   if (regno == -1 || getregs_supplies (regno))
  75     {
  76       struct reg regs;
  77
  78       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  79                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  80         perror_with_name (_("Couldn't get registers"));
  81
  82       mipsnbsd_fill_reg ((char *) &regs, regno);
  83
  84       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  85                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  86         perror_with_name (_("Couldn't write registers"));
  87
  88       if (regno != -1)
  89         return;
  90     }
  91
  92   if (regno == -1 || regno >= FP0_REGNUM)
  93     {
  94       struct fpreg fpregs;
  95
  96       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  97                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  98         perror_with_name (_("Couldn't get floating point status"));
  99
 100       mipsnbsd_fill_fpreg ((char *) &fpregs, regno);
 101
 102       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 103                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 104         perror_with_name (_("Couldn't write floating point status"));
 105     }
 106 }
 107 \f
 108
 109 /* Provide a prototype to silence -Wmissing-prototypes.  */
 110 void _initialize_mipsnbsd_nat (void);
 111
 112 void
 113 _initialize_mipsnbsd_nat (void)
 114 {
 115   struct target_ops *t;
 116
 117   t = inf_ptrace_target ();
 118   t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
 119   t->to_store_registers = mipsnbsd_store_inferior_registers;
 120   t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
 121
 122   add_target (t);
 123 }