gdb/gdbserver/nto-x86-low.c

/* QNX Neutrino specific low level interface, for the remote server
   for GDB.
   Copyright (C) 2009, 2010 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 "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;

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;
}

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