gdb/ppcnbsd-nat.c

   1 /* Native-dependent code for PowerPC's running NetBSD, for GDB.
   2    Copyright 2002 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, 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 <sys/types.h>
  23 #include <sys/ptrace.h>
  24 #include <machine/reg.h>
  25
  26 #include "defs.h"
  27 #include "inferior.h"
  28
  29 #include "ppc-tdep.h"
  30 #include "ppcnbsd-tdep.h"
  31
  32 /* Returns true if PT_GETREGS fetches this register.  */
  33 static int
  34 getregs_supplies (int regno)
  35 {
  36   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  37
  38   return ((regno >= 0 && regno <= 31)
  39           || regno == tdep->ppc_lr_regnum
  40           || regno == tdep->ppc_cr_regnum
  41           || regno == tdep->ppc_xer_regnum
  42           || regno == tdep->ppc_ctr_regnum
  43           || regno == PC_REGNUM);
  44 }
  45
  46 /* Like above, but for PT_GETFPREGS.  */
  47 static int
  48 getfpregs_supplies (int regno)
  49 {
  50   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  51
  52   return ((regno >= tdep->ppc_fp0_regnum
  53            && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
  54           || regno == tdep->ppc_fpscr_regnum);
  55 }
  56
  57 void
  58 fetch_inferior_registers (int regno)
  59 {
  60   if (regno == -1 || getregs_supplies (regno))
  61     {
  62       struct reg regs;
  63
  64       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  65                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  66         perror_with_name ("Couldn't get registers");
  67
  68       ppcnbsd_supply_reg ((char *) &regs, regno);
  69       if (regno != -1)
  70         return;
  71     }
  72
  73   if (regno == -1 || getfpregs_supplies (regno))
  74     {
  75       struct fpreg fpregs;
  76
  77       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  78                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  79         perror_with_name ("Couldn't get FP registers");
  80
  81       ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
  82       if (regno != -1)
  83         return;
  84     }
  85 }
  86
  87 void
  88 store_inferior_registers (int regno)
  89 {
  90   if (regno == -1 || getregs_supplies (regno))
  91     {
  92       struct reg regs;
  93
  94       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  95                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  96         perror_with_name ("Couldn't get registers");
  97
  98       ppcnbsd_fill_reg ((char *) &regs, regno);
  99
 100       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 101                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
 102         perror_with_name ("Couldn't write registers");
 103
 104       if (regno != -1)
 105         return;
 106     }
 107
 108   if (regno == -1 || getfpregs_supplies (regno))
 109     {
 110       struct fpreg fpregs;
 111
 112       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 113                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 114         perror_with_name ("Couldn't get FP registers");
 115
 116       ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
 117
 118       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 119                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 120         perror_with_name ("Couldn't set FP registers");
 121     }
 122 }