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/* QNX Neutrino specific low level interface, for the remote server
   for GDB.
   Copyright (C) 2009-2013 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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "server.h"
#include "nto-low.h"
#include "regdef.h"
#include "regcache.h"

#include <x86/context.h>


/* Definition auto generated from reg-i386.dep.  */
extern void init_registers_i386 ();
extern struct reg *regs_i386;
extern const struct target_desc *tdesc_i386;

const unsigned char x86_breakpoint[] = { 0xCC };
#define x86_breakpoint_len 1

/* Returns offset in appropriate Neutrino's context structure.
   Defined in x86/context.h.
   GDBREGNO is index into regs_i386 array.  It is autogenerated and
   hopefully doesn't change.  */
static int
nto_x86_register_offset (int gdbregno)
{
  if (gdbregno >= 0 && gdbregno < 16)
    {
      X86_CPU_REGISTERS *dummy = (void*)0;
      /* GPRs  */
      switch (gdbregno)
        {
        case 0: 
          return (int)&(dummy->eax);
        case 1:
          return (int)&(dummy->ecx);
        case 2:
          return (int)&(dummy->edx);
        case 3:
          return (int)&(dummy->ebx);
        case 4:
          return (int)&(dummy->esp);
        case 5:
          return (int)&(dummy->ebp);
        case 6:
          return (int)&(dummy->esi);
        case 7:
          return (int)&(dummy->edi);
        case 8:
          return (int)&(dummy->eip);
        case 9:
          return (int)&(dummy->efl);
        case 10:
          return (int)&(dummy->cs);
        case 11:
          return (int)&(dummy->ss);
#ifdef __SEGMENTS__
        case 12:
          return (int)&(dummy->ds);
        case 13:
          return (int)&(dummy->es);
        case 14:
          return (int)&(dummy->fs);
        case 15:
          return (int)&(dummy->gs);
#endif
        default:
          return -1;
        }
    }
  return -1;
}

static void
nto_x86_arch_setup (void)
{
  init_registers_i386 ();
  the_low_target.num_regs = 16;
  nto_tdesc = tdesc_i386;
}

struct nto_target_ops the_low_target =
{
  nto_x86_arch_setup,
  0, /* num_regs */
  nto_x86_register_offset,
  x86_breakpoint,
  x86_breakpoint_len
};