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/* Copyright (C) 2007, 2008 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 "win32-low.h"

#ifndef CONTEXT_FLOATING_POINT

#define CONTEXT_FLOATING_POINT 0

#endif

static void

arm_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)

{

  th->context.ContextFlags = \

    CONTEXT_FULL | \

    CONTEXT_FLOATING_POINT;

  GetThreadContext (th->h, &th->context);

}

static void

arm_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)

{

  SetThreadContext (th->h, &th->context);

}

#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))

static const int mappings[] = {

  context_offset (R0),

  context_offset (R1),

  context_offset (R2),

  context_offset (R3),

  context_offset (R4),

  context_offset (R5),

  context_offset (R6),

  context_offset (R7),

  context_offset (R8),

  context_offset (R9),

  context_offset (R10),

  context_offset (R11),

  context_offset (R12),

  context_offset (Sp),

  context_offset (Lr),

  context_offset (Pc),

  -1, /* f0 */

  -1, /* f1 */

  -1, /* f2 */

  -1, /* f3 */

  -1, /* f4 */

  -1, /* f5 */

  -1, /* f6 */

  -1, /* f7 */

  -1, /* fps */

  context_offset (Psr),

};

#undef context_offset

/* Return a pointer into a CONTEXT field indexed by gdb register number.

   Return a pointer to an dummy register holding zero if there is no

   corresponding CONTEXT field for the given register number.  */

static char *

regptr (CONTEXT* c, int r)

{

  if (mappings[r] < 0)

  {

    static ULONG zero;

    /* Always force value to zero, in case the user tried to write

       to this register before.  */

    zero = 0;

    return (char *) &zero;

  }

  else

    return (char *) c + mappings[r];

}

/* Fetch register from gdbserver regcache data.  */

static void

arm_fetch_inferior_register (win32_thread_info *th, int r)

{

  char *context_offset = regptr (&th->context, r);

  supply_register (r, context_offset);

}

/* Store a new register value into the thread context of TH.  */

static void

arm_store_inferior_register (win32_thread_info *th, int r)

{

  collect_register (r, regptr (&th->context, r));

}

/* Correct in either endianness.  We do not support Thumb yet.  */

static const unsigned long arm_wince_breakpoint = 0xe6000010;

#define arm_wince_breakpoint_len 4

struct win32_target_ops the_low_target = {

  sizeof (mappings) / sizeof (mappings[0]),

  NULL, /* initial_stuff */

  arm_get_thread_context,

  arm_set_thread_context,

  NULL, /* thread_added */

  arm_fetch_inferior_register,

  arm_store_inferior_register,

  NULL, /* single_step */

  (const unsigned char *) &arm_wince_breakpoint,

  arm_wince_breakpoint_len,

  "arm" /* arch_string */

};