gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright 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., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25
  26 #include "mipsnbsd-tdep.h"
  27
  28 #include <sys/types.h>
  29 #include <sys/ptrace.h>
  30 #include <machine/reg.h>
  31
  32 /* Determine if PT_GETREGS fetches this register.  */
  33 static int
  34 getregs_supplies (int regno)
  35 {
  36   return ((regno) >= ZERO_REGNUM && (regno) <= PC_REGNUM);
  37 }
  38
  39 void
  40 fetch_inferior_registers (int regno)
  41 {
  42   if (regno == -1 || getregs_supplies (regno))
  43     {
  44       struct reg regs;
  45
  46       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  47                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  48         perror_with_name ("Couldn't get registers");
  49
  50       mipsnbsd_supply_reg ((char *) &regs, regno);
  51       if (regno != -1)
  52         return;
  53     }
  54
  55   if (regno == -1 || regno >= FP0_REGNUM)
  56     {
  57       struct fpreg fpregs;
  58
  59       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  60                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  61         perror_with_name ("Couldn't get floating point status");
  62
  63       mipsnbsd_supply_fpreg ((char *) &fpregs, regno);
  64     }
  65 }
  66
  67 void
  68 store_inferior_registers (int regno)
  69 {
  70   if (regno == -1 || getregs_supplies (regno))
  71     {
  72       struct reg regs;
  73
  74       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  75                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  76         perror_with_name ("Couldn't get registers");
  77
  78       mipsnbsd_fill_reg ((char *) &regs, regno);
  79
  80       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  81                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  82         perror_with_name ("Couldn't write registers");
  83
  84       if (regno != -1)
  85         return;
  86     }
  87
  88   if (regno == -1 || regno >= FP0_REGNUM)
  89     {
  90       struct fpreg fpregs;
  91
  92       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  93                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  94         perror_with_name ("Couldn't get floating point status");
  95
  96       mipsnbsd_fill_fpreg ((char *) &fpregs, regno);
  97
  98       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
  99                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 100         perror_with_name ("Couldn't write floating point status");
 101     }
 102 }