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 >= FP0_REGNUM && regno <= FP0_REGNUM + 31)
  53           || regno == tdep->ppc_fpscr_regnum);
  54 }
  55
  56 void
  57 fetch_inferior_registers (int regno)
  58 {
  59   if (regno == -1 || getregs_supplies (regno))
  60     {
  61       struct reg regs;
  62
  63       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  64                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  65         perror_with_name ("Couldn't get registers");
  66
  67       ppcnbsd_supply_reg ((char *) &regs, regno);
  68       if (regno != -1)
  69         return;
  70     }
  71
  72   if (regno == -1 || getfpregs_supplies (regno))
  73     {
  74       struct fpreg fpregs;
  75
  76       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
  77                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
  78         perror_with_name ("Couldn't get FP registers");
  79
  80       ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
  81       if (regno != -1)
  82         return;
  83     }
  84 }
  85
  86 void
  87 store_inferior_registers (int regno)
  88 {
  89   if (regno == -1 || getregs_supplies (regno))
  90     {
  91       struct reg regs;
  92
  93       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  94                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  95         perror_with_name ("Couldn't get registers");
  96
  97       ppcnbsd_fill_reg ((char *) &regs, regno);
  98
  99       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 100                   (PTRACE_ARG3_TYPE) &regs, 0) == -1)
 101         perror_with_name ("Couldn't write registers");
 102
 103       if (regno != -1)
 104         return;
 105     }
 106
 107   if (regno == -1 || getfpregs_supplies (regno))
 108     {
 109       struct fpreg fpregs;
 110
 111       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 112                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 113         perror_with_name ("Couldn't get FP registers");
 114
 115       ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
 116
 117       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 118                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 119         perror_with_name ("Couldn't set FP registers");
 120     }
 121 }