a68v-nat.c   [plain text]

/* Host-dependent code for Apollo-68ks for GDB, the GNU debugger.
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1999, 2000, 2001
   Free Software Foundation, 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 "defs.h"
#include "inferior.h"
#include "regcache.h"

#ifndef _ISP__M68K
#define _ISP__M68K 1
#endif

#include <ptrace.h>

extern int errno;

void
fetch_inferior_registers (int ignored)
{
  struct ptrace_$data_regs_m68k inferior_registers;
  struct ptrace_$floating_regs_m68k inferior_fp_registers;
  struct ptrace_$control_regs_m68k inferior_control_registers;

  ptrace_$init_control (&inferior_control_registers);
  inferior_fp_registers.size = sizeof (inferior_fp_registers);

  registers_fetched ();

  ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_registers,
	  ptrace_$data_set,
	  (PTRACE_ARG3_TYPE) & inferior_registers,
	  ptrace_$data_set);

  ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k);

  ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k);

  bcopy (&inferior_registers, registers, 16 * 4);
  bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
	 sizeof inferior_fp_registers.regs);
  *(int *) &registers[REGISTER_BYTE (PS_REGNUM)] = inferior_control_registers.sr;
  *(int *) &registers[REGISTER_BYTE (PC_REGNUM)] = inferior_control_registers.pc;
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

void
store_inferior_registers (int regno)
{
  struct ptrace_$data_regs_m68k inferior_registers;
  struct ptrace_$floating_regs_m68k inferior_fp_registers;
  struct ptrace_$control_regs_m68k inferior_control_registers;

  ptrace_$init_control (&inferior_control_registers);
  inferior_fp_registers.size = sizeof (inferior_fp_registers);

  ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k);

  ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k);

  bcopy (registers, &inferior_registers, sizeof (inferior_registers));

  bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)], inferior_fp_registers.regs,
	 sizeof inferior_fp_registers.regs);

  inferior_control_registers.sr = *(int *) &registers[REGISTER_BYTE (PS_REGNUM)];
  inferior_control_registers.pc = *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];

  ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_registers,
	  ptrace_$data_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_registers,
	  ptrace_$data_set_m68k);

  ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers,
	  ptrace_$floating_set_m68k);

  ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k,
	  (PTRACE_ARG3_TYPE) & inferior_control_registers,
	  ptrace_$control_set_m68k);
}