gdb/mipsnbsd-nat.c

   1 /* Native-dependent code for MIPS systems running NetBSD.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004, 2007, 2008, 2009
   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 (struct gdbarch *gdbarch, int regno)
  37 {
  38   return ((regno) >= MIPS_ZERO_REGNUM
  39           && (regno) <= gdbarch_pc_regnum (gdbarch));
  40 }
  41
  42 static void
  43 mipsnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)
  44 {
  45   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  46   if (regno == -1 || getregs_supplies (gdbarch, 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 (regcache, (char *) &regs, regno);
  55       if (regno != -1)
  56         return;
  57     }
  58
  59   if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  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 (regcache, (char *) &fpregs, regno);
  68     }
  69 }
  70
  71 static void
  72 mipsnbsd_store_inferior_registers (struct regcache *regcache, int regno)
  73 {
  74   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  75   if (regno == -1 || getregs_supplies (gdbarch, regno))
  76     {
  77       struct reg regs;
  78
  79       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  80                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  81         perror_with_name (_("Couldn't get registers"));
  82
  83       mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
  84
  85       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  86                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  87         perror_with_name (_("Couldn't write registers"));
  88
  89       if (regno != -1)
  90         return;
  91     }
  92
  93   if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
  94     {
  95       struct fpreg fpregs;
  96
  97       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  98                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  99         perror_with_name (_("Couldn't get floating point status"));
 100
 101       mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
 102
 103       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 104                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 105         perror_with_name (_("Couldn't write floating point status"));
 106     }
 107 }
 108 \f
 109
 110 /* Provide a prototype to silence -Wmissing-prototypes.  */
 111 void _initialize_mipsnbsd_nat (void);
 112
 113 void
 114 _initialize_mipsnbsd_nat (void)
 115 {
 116   struct target_ops *t;
 117
 118   t = inf_ptrace_target ();
 119   t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
 120   t->to_store_registers = mipsnbsd_store_inferior_registers;
 121   add_target (t);
 122 }