gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2    Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "inferior.h"
  23 #include "regcache.h"
  24
  25 #include "mipsnbsd-tdep.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 /* Determine if PT_GETREGS fetches this register.  */
  32 static int
  33 getregs_supplies (int regno)
  34 {
  35   return ((regno) >= ZERO_REGNUM && (regno) <= PC_REGNUM);
  36 }
  37
  38 void
  39 fetch_inferior_registers (int regno)
  40 {
  41   if (regno == -1 || getregs_supplies (regno))
  42     {
  43       struct reg regs;
  44
  45       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  46                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  47         perror_with_name ("Couldn't get registers");
  48
  49       mipsnbsd_supply_reg ((char *) &regs, regno);
  50       if (regno != -1)
  51         return;
  52     }
  53
  54   if (regno == -1 || regno >= FP0_REGNUM)
  55     {
  56       struct fpreg fpregs;
  57
  58       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  59                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  60         perror_with_name ("Couldn't get floating point status");
  61
  62       mipsnbsd_supply_fpreg ((char *) &fpregs, regno);
  63     }
  64 }
  65
  66 void
  67 store_inferior_registers (int regno)
  68 {
  69   if (regno == -1 || getregs_supplies (regno))
  70     {
  71       struct reg regs;
  72
  73       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  74                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  75         perror_with_name ("Couldn't get registers");
  76
  77       mipsnbsd_fill_reg ((char *) &regs, regno);
  78
  79       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  80                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  81         perror_with_name ("Couldn't write registers");
  82
  83       if (regno != -1)
  84         return;
  85     }
  86
  87   if (regno == -1 || regno >= FP0_REGNUM)
  88     {
  89       struct fpreg fpregs;
  90
  91       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  92                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  93         perror_with_name ("Couldn't get floating point status");
  94
  95       mipsnbsd_fill_fpreg ((char *) &fpregs, regno);
  96
  97       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
  98                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  99         perror_with_name ("Couldn't write floating point status");
 100     }
 101 }