binutils-gdb/gdb/shnbsd-nat.c

/* Native-dependent code for SuperH running NetBSD, for GDB.
   Copyright 2002 Free Software Foundation, Inc.
   Contributed by Wasabi Systems, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>

#include "defs.h"
#include "inferior.h"

#include "shnbsd-tdep.h"

/* Determine if PT_GETREGS fetches this register. */
#define GETREGS_SUPPLIES(regno) \
  (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
|| (regno) == PC_REGNUM || (regno) == PR_REGNUM \
|| (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
|| (regno) == SR_REGNUM)

void
fetch_inferior_registers (int regno)
{
  if (regno == -1 || GETREGS_SUPPLIES (regno))
    {
      struct reg inferior_registers;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
	perror_with_name ("Couldn't get registers");

      shnbsd_supply_reg ((char *) &inferior_registers, regno);

      if (regno != -1)
	return;
    }
}

void
store_inferior_registers (int regno)
{
  if (regno == -1 || GETREGS_SUPPLIES (regno))
    {
      struct reg inferior_registers;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
	perror_with_name ("Couldn't get registers");

      shnbsd_fill_reg ((char *) &inferior_registers, regno);

      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &inferior_registers, 0) == -1)
	perror_with_name ("Couldn't set registers");

      if (regno != -1)
	return;
    }
}