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 #include "gdbcore.h"
  29 #include "regcache.h"
  30
  31 #include "ppc-tdep.h"
  32 #include "ppcnbsd-tdep.h"
  33
  34 /* Returns true if PT_GETREGS fetches this register.  */
  35 static int
  36 getregs_supplies (int regno)
  37 {
  38   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  39
  40   return ((regno >= 0 && regno <= 31)
  41           || regno == tdep->ppc_lr_regnum
  42           || regno == tdep->ppc_cr_regnum
  43           || regno == tdep->ppc_xer_regnum
  44           || regno == tdep->ppc_ctr_regnum
  45           || regno == PC_REGNUM);
  46 }
  47
  48 /* Like above, but for PT_GETFPREGS.  */
  49 static int
  50 getfpregs_supplies (int regno)
  51 {
  52   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
  53
  54   return ((regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31)
  55           || regno == tdep->ppc_fpscr_regnum);
  56 }
  57
  58 void
  59 fetch_inferior_registers (int regno)
  60 {
  61   if (regno == -1 || getregs_supplies (regno))
  62     {
  63       struct reg regs;
  64
  65       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  66                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  67         perror_with_name ("Couldn't get registers");
  68
  69       ppcnbsd_supply_reg ((char *) &regs, regno);
  70       if (regno != -1)
  71         return;
  72     }
  73
  74   if (regno == -1 || getfpregs_supplies (regno))
  75     {
  76       struct fpreg fpregs;
  77
  78       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  79                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  80         perror_with_name ("Couldn't get FP registers");
  81
  82       ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
  83       if (regno != -1)
  84         return;
  85     }
  86 }
  87
  88 void
  89 store_inferior_registers (int regno)
  90 {
  91   if (regno == -1 || getregs_supplies (regno))
  92     {
  93       struct reg regs;
  94
  95       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  96                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  97         perror_with_name ("Couldn't get registers");
  98
  99       ppcnbsd_fill_reg ((char *) &regs, regno);
 100
 101       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 102                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
 103         perror_with_name ("Couldn't write registers");
 104
 105       if (regno != -1)
 106         return;
 107     }
 108
 109   if (regno == -1 || getfpregs_supplies (regno))
 110     {
 111       struct fpreg fpregs;
 112
 113       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 114                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 115         perror_with_name ("Couldn't get FP registers");
 116
 117       ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
 118
 119       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 120                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 121         perror_with_name ("Couldn't set FP registers");
 122     }
 123 }