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 "mips-tdep.h"
  27 #include "mipsnbsd-tdep.h"
  28
  29 #include <sys/types.h>
  30 #include <sys/ptrace.h>
  31 #include <machine/reg.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 && (regno) <= PC_REGNUM);
  38 }
  39
  40 void
  41 fetch_inferior_registers (int regno)
  42 {
  43   if (regno == -1 || getregs_supplies (regno))
  44     {
  45       struct reg regs;
  46
  47       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  48                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  49         perror_with_name ("Couldn't get registers");
  50
  51       mipsnbsd_supply_reg ((char *) &regs, regno);
  52       if (regno != -1)
  53         return;
  54     }
  55
  56   if (regno == -1 || regno >= FP0_REGNUM)
  57     {
  58       struct fpreg fpregs;
  59
  60       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  61                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  62         perror_with_name ("Couldn't get floating point status");
  63
  64       mipsnbsd_supply_fpreg ((char *) &fpregs, regno);
  65     }
  66 }
  67
  68 void
  69 store_inferior_registers (int regno)
  70 {
  71   if (regno == -1 || getregs_supplies (regno))
  72     {
  73       struct reg regs;
  74
  75       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  76                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  77         perror_with_name ("Couldn't get registers");
  78
  79       mipsnbsd_fill_reg ((char *) &regs, regno);
  80
  81       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  82                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  83         perror_with_name ("Couldn't write registers");
  84
  85       if (regno != -1)
  86         return;
  87     }
  88
  89   if (regno == -1 || regno >= FP0_REGNUM)
  90     {
  91       struct fpreg fpregs;
  92
  93       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  94                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  95         perror_with_name ("Couldn't get floating point status");
  96
  97       mipsnbsd_fill_fpreg ((char *) &fpregs, regno);
  98
  99       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 100                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 101         perror_with_name ("Couldn't write floating point status");
 102     }
 103 }