[deliverable/binutils-gdb.git] / gdb / gdbserver / win32-i386-low.c

/* Copyright (C) 2007-2014 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"
#include "i386-low.h"

#ifndef CONTEXT_EXTENDED_REGISTERS
#define CONTEXT_EXTENDED_REGISTERS 0
#endif

#define FCS_REGNUM 27
#define FOP_REGNUM 31

#define FLAG_TRACE_BIT 0x100

#ifdef __x86_64__
/* Defined in auto-generated file reg-amd64.c.  */
void init_registers_amd64 (void);
extern const struct target_desc *tdesc_amd64;
#else
/* Defined in auto-generated file reg-i386.c.  */
void init_registers_i386 (void);
extern const struct target_desc *tdesc_i386;
#endif

static struct i386_debug_reg_state debug_reg_state;

static int debug_registers_changed = 0;
static int debug_registers_used = 0;

/* Update the inferior's debug register REGNUM from STATE.  */

void
i386_dr_low_set_addr (const struct i386_debug_reg_state *state, int regnum)
{
  if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR))
    fatal ("Invalid debug register %d", regnum);

  /* debug_reg_state.dr_mirror is already set.
     Just notify i386_set_thread_context, i386_thread_added
     that the registers need to be updated.  */
  debug_registers_changed = 1;
  debug_registers_used = 1;
}

CORE_ADDR
i386_dr_low_get_addr (int regnum)
{
  gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);

  return debug_reg_state.dr_mirror[regnum];
}

/* Update the inferior's DR7 debug control register from STATE.  */

void
i386_dr_low_set_control (const struct i386_debug_reg_state *state)
{
  /* debug_reg_state.dr_control_mirror is already set.
     Just notify i386_set_thread_context, i386_thread_added
     that the registers need to be updated.  */
  debug_registers_changed = 1;
  debug_registers_used = 1;
}

unsigned
i386_dr_low_get_control (void)
{
  return debug_reg_state.dr_control_mirror;
}

/* Get the value of the DR6 debug status register from the inferior
   and record it in STATE.  */

unsigned
i386_dr_low_get_status (void)
{
  /* We don't need to do anything here, the last call to thread_rec for
     current_event.dwThreadId id has already set it.  */
  return debug_reg_state.dr_status_mirror;
}

/* Breakpoint/watchpoint support.  */

static int
i386_supports_z_point_type (char z_type)
{
  switch (z_type)
    {
    case Z_PACKET_WRITE_WP:
    case Z_PACKET_ACCESS_WP:
      return 1;
    default:
      return 0;
    }
}

static int
i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
		   int size, struct raw_breakpoint *bp)
{
  switch (type)
    {
    case raw_bkpt_type_write_wp:
    case raw_bkpt_type_access_wp:
      {
	enum target_hw_bp_type hw_type
	  = raw_bkpt_type_to_target_hw_bp_type (type);

	return i386_dr_insert_watchpoint (&debug_reg_state,
					  hw_type, addr, size);
      }
    default:
      /* Unsupported.  */
      return 1;
    }
}

static int
i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
		   int size, struct raw_breakpoint *bp)
{
  switch (type)
    {
    case raw_bkpt_type_write_wp:
    case raw_bkpt_type_access_wp:
      {
	enum target_hw_bp_type hw_type
	  = raw_bkpt_type_to_target_hw_bp_type (type);

	return i386_dr_remove_watchpoint (&debug_reg_state,
					  hw_type, addr, size);
      }
    default:
      /* Unsupported.  */
      return 1;
    }
}

static int
i386_stopped_by_watchpoint (void)
{
  return i386_dr_stopped_by_watchpoint (&debug_reg_state);
}

static CORE_ADDR
i386_stopped_data_address (void)
{
  CORE_ADDR addr;
  if (i386_dr_stopped_data_address (&debug_reg_state, &addr))
    return addr;
  return 0;
}

static void
i386_initial_stuff (void)
{
  i386_low_init_dregs (&debug_reg_state);
  debug_registers_changed = 0;
  debug_registers_used = 0;
}

static void
i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
{
  /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
     the system doesn't support extended registers.  */
  static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;

 again:
  th->context.ContextFlags = (CONTEXT_FULL
			      | CONTEXT_FLOATING_POINT
			      | CONTEXT_DEBUG_REGISTERS
			      | extended_registers);

  if (!GetThreadContext (th->h, &th->context))
    {
      DWORD e = GetLastError ();

      if (extended_registers && e == ERROR_INVALID_PARAMETER)
	{
	  extended_registers = 0;
	  goto again;
	}

      error ("GetThreadContext failure %ld\n", (long) e);
    }

  debug_registers_changed = 0;

  if (th->tid == current_event->dwThreadId)
    {
      /* Copy dr values from the current thread.  */
      struct i386_debug_reg_state *dr = &debug_reg_state;
      dr->dr_mirror[0] = th->context.Dr0;
      dr->dr_mirror[1] = th->context.Dr1;
      dr->dr_mirror[2] = th->context.Dr2;
      dr->dr_mirror[3] = th->context.Dr3;
      dr->dr_status_mirror = th->context.Dr6;
      dr->dr_control_mirror = th->context.Dr7;
    }
}

static void
i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
{
  if (debug_registers_changed)
    {
      struct i386_debug_reg_state *dr = &debug_reg_state;
      th->context.Dr0 = dr->dr_mirror[0];
      th->context.Dr1 = dr->dr_mirror[1];
      th->context.Dr2 = dr->dr_mirror[2];
      th->context.Dr3 = dr->dr_mirror[3];
      /* th->context.Dr6 = dr->dr_status_mirror;
	 FIXME: should we set dr6 also ?? */
      th->context.Dr7 = dr->dr_control_mirror;
    }

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

static void
i386_thread_added (win32_thread_info *th)
{
  /* Set the debug registers for the new thread if they are used.  */
  if (debug_registers_used)
    {
      struct i386_debug_reg_state *dr = &debug_reg_state;
      th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
      GetThreadContext (th->h, &th->context);

      th->context.Dr0 = dr->dr_mirror[0];
      th->context.Dr1 = dr->dr_mirror[1];
      th->context.Dr2 = dr->dr_mirror[2];
      th->context.Dr3 = dr->dr_mirror[3];
      /* th->context.Dr6 = dr->dr_status_mirror;
	 FIXME: should we set dr6 also ?? */
      th->context.Dr7 = dr->dr_control_mirror;

      SetThreadContext (th->h, &th->context);
      th->context.ContextFlags = 0;
    }
}

static void
i386_single_step (win32_thread_info *th)
{
  th->context.EFlags |= FLAG_TRACE_BIT;
}

#ifndef __x86_64__

/* An array of offset mappings into a Win32 Context structure.
   This is a one-to-one mapping which is indexed by gdb's register
   numbers.  It retrieves an offset into the context structure where
   the 4 byte register is located.
   An offset value of -1 indicates that Win32 does not provide this
   register in it's CONTEXT structure.  In this case regptr will return
   a pointer into a dummy register.  */
#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
static const int mappings[] = {
  context_offset (Eax),
  context_offset (Ecx),
  context_offset (Edx),
  context_offset (Ebx),
  context_offset (Esp),
  context_offset (Ebp),
  context_offset (Esi),
  context_offset (Edi),
  context_offset (Eip),
  context_offset (EFlags),
  context_offset (SegCs),
  context_offset (SegSs),
  context_offset (SegDs),
  context_offset (SegEs),
  context_offset (SegFs),
  context_offset (SegGs),
  context_offset (FloatSave.RegisterArea[0 * 10]),
  context_offset (FloatSave.RegisterArea[1 * 10]),
  context_offset (FloatSave.RegisterArea[2 * 10]),
  context_offset (FloatSave.RegisterArea[3 * 10]),
  context_offset (FloatSave.RegisterArea[4 * 10]),
  context_offset (FloatSave.RegisterArea[5 * 10]),
  context_offset (FloatSave.RegisterArea[6 * 10]),
  context_offset (FloatSave.RegisterArea[7 * 10]),
  context_offset (FloatSave.ControlWord),
  context_offset (FloatSave.StatusWord),
  context_offset (FloatSave.TagWord),
  context_offset (FloatSave.ErrorSelector),
  context_offset (FloatSave.ErrorOffset),
  context_offset (FloatSave.DataSelector),
  context_offset (FloatSave.DataOffset),
  context_offset (FloatSave.ErrorSelector),
  /* XMM0-7 */
  context_offset (ExtendedRegisters[10 * 16]),
  context_offset (ExtendedRegisters[11 * 16]),
  context_offset (ExtendedRegisters[12 * 16]),
  context_offset (ExtendedRegisters[13 * 16]),
  context_offset (ExtendedRegisters[14 * 16]),
  context_offset (ExtendedRegisters[15 * 16]),
  context_offset (ExtendedRegisters[16 * 16]),
  context_offset (ExtendedRegisters[17 * 16]),
  /* MXCSR */
  context_offset (ExtendedRegisters[24])
};
#undef context_offset

#else /* __x86_64__ */

#define context_offset(x) (offsetof (CONTEXT, x))
static const int mappings[] =
{
  context_offset (Rax),
  context_offset (Rbx),
  context_offset (Rcx),
  context_offset (Rdx),
  context_offset (Rsi),
  context_offset (Rdi),
  context_offset (Rbp),
  context_offset (Rsp),
  context_offset (R8),
  context_offset (R9),
  context_offset (R10),
  context_offset (R11),
  context_offset (R12),
  context_offset (R13),
  context_offset (R14),
  context_offset (R15),
  context_offset (Rip),
  context_offset (EFlags),
  context_offset (SegCs),
  context_offset (SegSs),
  context_offset (SegDs),
  context_offset (SegEs),
  context_offset (SegFs),
  context_offset (SegGs),
  context_offset (FloatSave.FloatRegisters[0]),
  context_offset (FloatSave.FloatRegisters[1]),
  context_offset (FloatSave.FloatRegisters[2]),
  context_offset (FloatSave.FloatRegisters[3]),
  context_offset (FloatSave.FloatRegisters[4]),
  context_offset (FloatSave.FloatRegisters[5]),
  context_offset (FloatSave.FloatRegisters[6]),
  context_offset (FloatSave.FloatRegisters[7]),
  context_offset (FloatSave.ControlWord),
  context_offset (FloatSave.StatusWord),
  context_offset (FloatSave.TagWord),
  context_offset (FloatSave.ErrorSelector),
  context_offset (FloatSave.ErrorOffset),
  context_offset (FloatSave.DataSelector),
  context_offset (FloatSave.DataOffset),
  context_offset (FloatSave.ErrorSelector)
  /* XMM0-7 */ ,
  context_offset (Xmm0),
  context_offset (Xmm1),
  context_offset (Xmm2),
  context_offset (Xmm3),
  context_offset (Xmm4),
  context_offset (Xmm5),
  context_offset (Xmm6),
  context_offset (Xmm7),
  context_offset (Xmm8),
  context_offset (Xmm9),
  context_offset (Xmm10),
  context_offset (Xmm11),
  context_offset (Xmm12),
  context_offset (Xmm13),
  context_offset (Xmm14),
  context_offset (Xmm15),
  /* MXCSR */
  context_offset (FloatSave.MxCsr)
};
#undef context_offset

#endif /* __x86_64__ */

/* Fetch register from gdbserver regcache data.  */
static void
i386_fetch_inferior_register (struct regcache *regcache,
			      win32_thread_info *th, int r)
{
  char *context_offset = (char *) &th->context + mappings[r];

  long l;
  if (r == FCS_REGNUM)
    {
      l = *((long *) context_offset) & 0xffff;
      supply_register (regcache, r, (char *) &l);
    }
  else if (r == FOP_REGNUM)
    {
      l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
      supply_register (regcache, r, (char *) &l);
    }
  else
    supply_register (regcache, r, context_offset);
}

/* Store a new register value into the thread context of TH.  */
static void
i386_store_inferior_register (struct regcache *regcache,
			      win32_thread_info *th, int r)
{
  char *context_offset = (char *) &th->context + mappings[r];
  collect_register (regcache, r, context_offset);
}

static const unsigned char i386_win32_breakpoint = 0xcc;
#define i386_win32_breakpoint_len 1

static void
i386_arch_setup (void)
{
#ifdef __x86_64__
  init_registers_amd64 ();
  win32_tdesc = tdesc_amd64;
#else
  init_registers_i386 ();
  win32_tdesc = tdesc_i386;
#endif
}

struct win32_target_ops the_low_target = {
  i386_arch_setup,
  sizeof (mappings) / sizeof (mappings[0]),
  i386_initial_stuff,
  i386_get_thread_context,
  i386_set_thread_context,
  i386_thread_added,
  i386_fetch_inferior_register,
  i386_store_inferior_register,
  i386_single_step,
  &i386_win32_breakpoint,
  i386_win32_breakpoint_len,
  i386_supports_z_point_type,
  i386_insert_point,
  i386_remove_point,
  i386_stopped_by_watchpoint,
  i386_stopped_data_address
};
Commit	Line	Data
ecd75fc8	1	/* Copyright (C) 2007-2014 Free Software Foundation, Inc.
68070c10 PA	2
	3	This file is part of GDB.
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
a9762ec7	7	the Free Software Foundation; either version 3 of the License, or
68070c10 PA	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
a9762ec7	16	along with this program. If not, see <http://www.gnu.org/licenses/>. */
68070c10 PA	17
	18	#include "server.h"
	19	#include "win32-low.h"
aa5ca48f	20	#include "i386-low.h"
68070c10	21
54709339 PM	22	#ifndef CONTEXT_EXTENDED_REGISTERS
	23	#define CONTEXT_EXTENDED_REGISTERS 0
	24	#endif
	25
68070c10 PA	26	#define FCS_REGNUM 27
	27	#define FOP_REGNUM 31
	28
	29	#define FLAG_TRACE_BIT 0x100
	30
1c07cc19 PM	31	#ifdef __x86_64__
1c07cc19 PM	32	/* Defined in auto-generated file reg-amd64.c. */
54709339	33	void init_registers_amd64 (void);
3aee8918	34	extern const struct target_desc *tdesc_amd64;
54709339	35	#else
d05b4ac3 UW	36	/* Defined in auto-generated file reg-i386.c. */
d05b4ac3 UW	37	void init_registers_i386 (void);
3aee8918	38	extern const struct target_desc *tdesc_i386;
54709339	39	#endif
d05b4ac3	40
aa5ca48f	41	static struct i386_debug_reg_state debug_reg_state;
68070c10	42
34b34921 PA	43	static int debug_registers_changed = 0;
	44	static int debug_registers_used = 0;
	45
aa5ca48f DE	46	/* Update the inferior's debug register REGNUM from STATE. */
	47
	48	void
	49	i386_dr_low_set_addr (const struct i386_debug_reg_state *state, int regnum)
	50	{
	51	if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR))
	52	fatal ("Invalid debug register %d", regnum);
	53
	54	/* debug_reg_state.dr_mirror is already set.
	55	Just notify i386_set_thread_context, i386_thread_added
	56	that the registers need to be updated. */
	57	debug_registers_changed = 1;
	58	debug_registers_used = 1;
	59	}
	60
964e4306 PA	61	CORE_ADDR
	62	i386_dr_low_get_addr (int regnum)
	63	{
0a5b1e09	64	gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
964e4306 PA	65
	66	return debug_reg_state.dr_mirror[regnum];
	67	}
	68
aa5ca48f DE	69	/* Update the inferior's DR7 debug control register from STATE. */
	70
	71	void
	72	i386_dr_low_set_control (const struct i386_debug_reg_state *state)
	73	{
	74	/* debug_reg_state.dr_control_mirror is already set.
	75	Just notify i386_set_thread_context, i386_thread_added
	76	that the registers need to be updated. */
	77	debug_registers_changed = 1;
	78	debug_registers_used = 1;
	79	}
	80
964e4306 PA	81	unsigned
	82	i386_dr_low_get_control (void)
	83	{
8d26e50c	84	return debug_reg_state.dr_control_mirror;
964e4306 PA	85	}
964e4306 PA	86
aa5ca48f DE	87	/* Get the value of the DR6 debug status register from the inferior
	88	and record it in STATE. */
	89
964e4306 PA	90	unsigned
964e4306 PA	91	i386_dr_low_get_status (void)
aa5ca48f DE	92	{
	93	/* We don't need to do anything here, the last call to thread_rec for
	94	current_event.dwThreadId id has already set it. */
8d26e50c	95	return debug_reg_state.dr_status_mirror;
aa5ca48f DE	96	}
aa5ca48f DE	97
802e8e6d	98	/* Breakpoint/watchpoint support. */
aa5ca48f DE	99
aa5ca48f DE	100	static int
802e8e6d PA	101	i386_supports_z_point_type (char z_type)
	102	{
	103	switch (z_type)
	104	{
	105	case Z_PACKET_WRITE_WP:
	106	case Z_PACKET_ACCESS_WP:
	107	return 1;
	108	default:
	109	return 0;
	110	}
	111	}
	112
	113	static int
	114	i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
	115	int size, struct raw_breakpoint *bp)
aa5ca48f DE	116	{
	117	switch (type)
	118	{
802e8e6d PA	119	case raw_bkpt_type_write_wp:
802e8e6d PA	120	case raw_bkpt_type_access_wp:
a4165e94	121	{
802e8e6d PA	122	enum target_hw_bp_type hw_type
802e8e6d PA	123	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	124
4be83cc2 GB	125	return i386_dr_insert_watchpoint (&debug_reg_state,
4be83cc2 GB	126	hw_type, addr, size);
a4165e94	127	}
aa5ca48f DE	128	default:
	129	/* Unsupported. */
	130	return 1;
	131	}
	132	}
	133
	134	static int
802e8e6d PA	135	i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
802e8e6d PA	136	int size, struct raw_breakpoint *bp)
aa5ca48f DE	137	{
	138	switch (type)
	139	{
802e8e6d PA	140	case raw_bkpt_type_write_wp:
802e8e6d PA	141	case raw_bkpt_type_access_wp:
a4165e94	142	{
802e8e6d PA	143	enum target_hw_bp_type hw_type
802e8e6d PA	144	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	145
4be83cc2 GB	146	return i386_dr_remove_watchpoint (&debug_reg_state,
4be83cc2 GB	147	hw_type, addr, size);
a4165e94	148	}
aa5ca48f DE	149	default:
	150	/* Unsupported. */
	151	return 1;
	152	}
	153	}
	154
	155	static int
	156	i386_stopped_by_watchpoint (void)
	157	{
4be83cc2	158	return i386_dr_stopped_by_watchpoint (&debug_reg_state);
aa5ca48f DE	159	}
	160
	161	static CORE_ADDR
	162	i386_stopped_data_address (void)
	163	{
	164	CORE_ADDR addr;
4be83cc2	165	if (i386_dr_stopped_data_address (&debug_reg_state, &addr))
aa5ca48f DE	166	return addr;
	167	return 0;
	168	}
	169
68070c10	170	static void
34b34921	171	i386_initial_stuff (void)
68070c10	172	{
aa5ca48f	173	i386_low_init_dregs (&debug_reg_state);
34b34921 PA	174	debug_registers_changed = 0;
34b34921 PA	175	debug_registers_used = 0;
68070c10 PA	176	}
	177
	178	static void
34b34921	179	i386_get_thread_context (win32_thread_info th, DEBUG_EVENT current_event)
68070c10	180	{
912cf4ba PA	181	/* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
	182	the system doesn't support extended registers. */
	183	static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;
34b34921	184
912cf4ba PA	185	again:
	186	th->context.ContextFlags = (CONTEXT_FULL
	187	\| CONTEXT_FLOATING_POINT
	188	\| CONTEXT_DEBUG_REGISTERS
	189	\| extended_registers);
	190
	191	if (!GetThreadContext (th->h, &th->context))
	192	{
	193	DWORD e = GetLastError ();
	194
	195	if (extended_registers && e == ERROR_INVALID_PARAMETER)
	196	{
	197	extended_registers = 0;
	198	goto again;
	199	}
	200
	201	error ("GetThreadContext failure %ld\n", (long) e);
	202	}
34b34921 PA	203
	204	debug_registers_changed = 0;
	205
	206	if (th->tid == current_event->dwThreadId)
	207	{
	208	/* Copy dr values from the current thread. */
aa5ca48f DE	209	struct i386_debug_reg_state *dr = &debug_reg_state;
	210	dr->dr_mirror[0] = th->context.Dr0;
	211	dr->dr_mirror[1] = th->context.Dr1;
	212	dr->dr_mirror[2] = th->context.Dr2;
	213	dr->dr_mirror[3] = th->context.Dr3;
8d26e50c JB	214	dr->dr_status_mirror = th->context.Dr6;
8d26e50c JB	215	dr->dr_control_mirror = th->context.Dr7;
34b34921	216	}
68070c10 PA	217	}
	218
	219	static void
34b34921	220	i386_set_thread_context (win32_thread_info th, DEBUG_EVENT current_event)
68070c10	221	{
34b34921 PA	222	if (debug_registers_changed)
34b34921 PA	223	{
aa5ca48f DE	224	struct i386_debug_reg_state *dr = &debug_reg_state;
	225	th->context.Dr0 = dr->dr_mirror[0];
	226	th->context.Dr1 = dr->dr_mirror[1];
	227	th->context.Dr2 = dr->dr_mirror[2];
	228	th->context.Dr3 = dr->dr_mirror[3];
8d26e50c	229	/* th->context.Dr6 = dr->dr_status_mirror;
34b34921	230	FIXME: should we set dr6 also ?? */
8d26e50c	231	th->context.Dr7 = dr->dr_control_mirror;
34b34921 PA	232	}
	233
	234	SetThreadContext (th->h, &th->context);
68070c10 PA	235	}
68070c10 PA	236
68070c10	237	static void
34b34921	238	i386_thread_added (win32_thread_info *th)
68070c10	239	{
34b34921 PA	240	/* Set the debug registers for the new thread if they are used. */
34b34921 PA	241	if (debug_registers_used)
68070c10	242	{
aa5ca48f	243	struct i386_debug_reg_state *dr = &debug_reg_state;
34b34921 PA	244	th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
	245	GetThreadContext (th->h, &th->context);
	246
aa5ca48f DE	247	th->context.Dr0 = dr->dr_mirror[0];
	248	th->context.Dr1 = dr->dr_mirror[1];
	249	th->context.Dr2 = dr->dr_mirror[2];
	250	th->context.Dr3 = dr->dr_mirror[3];
8d26e50c	251	/* th->context.Dr6 = dr->dr_status_mirror;
34b34921	252	FIXME: should we set dr6 also ?? */
8d26e50c	253	th->context.Dr7 = dr->dr_control_mirror;
34b34921 PA	254
	255	SetThreadContext (th->h, &th->context);
	256	th->context.ContextFlags = 0;
68070c10	257	}
68070c10 PA	258	}
	259
	260	static void
34b34921	261	i386_single_step (win32_thread_info *th)
68070c10 PA	262	{
	263	th->context.EFlags \|= FLAG_TRACE_BIT;
	264	}
	265
1c07cc19	266	#ifndef __x86_64__
54709339	267
68070c10 PA	268	/* An array of offset mappings into a Win32 Context structure.
	269	This is a one-to-one mapping which is indexed by gdb's register
	270	numbers. It retrieves an offset into the context structure where
	271	the 4 byte register is located.
	272	An offset value of -1 indicates that Win32 does not provide this
	273	register in it's CONTEXT structure. In this case regptr will return
	274	a pointer into a dummy register. */
	275	#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
	276	static const int mappings[] = {
	277	context_offset (Eax),
	278	context_offset (Ecx),
	279	context_offset (Edx),
	280	context_offset (Ebx),
	281	context_offset (Esp),
	282	context_offset (Ebp),
	283	context_offset (Esi),
	284	context_offset (Edi),
	285	context_offset (Eip),
	286	context_offset (EFlags),
	287	context_offset (SegCs),
	288	context_offset (SegSs),
	289	context_offset (SegDs),
	290	context_offset (SegEs),
	291	context_offset (SegFs),
	292	context_offset (SegGs),
	293	context_offset (FloatSave.RegisterArea[0 * 10]),
	294	context_offset (FloatSave.RegisterArea[1 * 10]),
	295	context_offset (FloatSave.RegisterArea[2 * 10]),
	296	context_offset (FloatSave.RegisterArea[3 * 10]),
	297	context_offset (FloatSave.RegisterArea[4 * 10]),
	298	context_offset (FloatSave.RegisterArea[5 * 10]),
	299	context_offset (FloatSave.RegisterArea[6 * 10]),
	300	context_offset (FloatSave.RegisterArea[7 * 10]),
	301	context_offset (FloatSave.ControlWord),
	302	context_offset (FloatSave.StatusWord),
	303	context_offset (FloatSave.TagWord),
	304	context_offset (FloatSave.ErrorSelector),
	305	context_offset (FloatSave.ErrorOffset),
	306	context_offset (FloatSave.DataSelector),
	307	context_offset (FloatSave.DataOffset),
	308	context_offset (FloatSave.ErrorSelector),
	309	/* XMM0-7 */
	310	context_offset (ExtendedRegisters[10 * 16]),
	311	context_offset (ExtendedRegisters[11 * 16]),
	312	context_offset (ExtendedRegisters[12 * 16]),
	313	context_offset (ExtendedRegisters[13 * 16]),
	314	context_offset (ExtendedRegisters[14 * 16]),
	315	context_offset (ExtendedRegisters[15 * 16]),
	316	context_offset (ExtendedRegisters[16 * 16]),
	317	context_offset (ExtendedRegisters[17 * 16]),
	318	/* MXCSR */
	319	context_offset (ExtendedRegisters[24])
	320	};
	321	#undef context_offset
	322
1c07cc19	323	#else /* __x86_64__ */
54709339 PM	324
	325	#define context_offset(x) (offsetof (CONTEXT, x))
	326	static const int mappings[] =
	327	{
	328	context_offset (Rax),
	329	context_offset (Rbx),
	330	context_offset (Rcx),
	331	context_offset (Rdx),
	332	context_offset (Rsi),
	333	context_offset (Rdi),
	334	context_offset (Rbp),
	335	context_offset (Rsp),
	336	context_offset (R8),
	337	context_offset (R9),
	338	context_offset (R10),
	339	context_offset (R11),
	340	context_offset (R12),
	341	context_offset (R13),
	342	context_offset (R14),
	343	context_offset (R15),
	344	context_offset (Rip),
	345	context_offset (EFlags),
	346	context_offset (SegCs),
	347	context_offset (SegSs),
	348	context_offset (SegDs),
	349	context_offset (SegEs),
	350	context_offset (SegFs),
	351	context_offset (SegGs),
	352	context_offset (FloatSave.FloatRegisters[0]),
	353	context_offset (FloatSave.FloatRegisters[1]),
	354	context_offset (FloatSave.FloatRegisters[2]),
	355	context_offset (FloatSave.FloatRegisters[3]),
	356	context_offset (FloatSave.FloatRegisters[4]),
	357	context_offset (FloatSave.FloatRegisters[5]),
	358	context_offset (FloatSave.FloatRegisters[6]),
	359	context_offset (FloatSave.FloatRegisters[7]),
	360	context_offset (FloatSave.ControlWord),
	361	context_offset (FloatSave.StatusWord),
	362	context_offset (FloatSave.TagWord),
	363	context_offset (FloatSave.ErrorSelector),
	364	context_offset (FloatSave.ErrorOffset),
	365	context_offset (FloatSave.DataSelector),
	366	context_offset (FloatSave.DataOffset),
	367	context_offset (FloatSave.ErrorSelector)
	368	/* XMM0-7 */ ,
	369	context_offset (Xmm0),
	370	context_offset (Xmm1),
	371	context_offset (Xmm2),
	372	context_offset (Xmm3),
	373	context_offset (Xmm4),
	374	context_offset (Xmm5),
	375	context_offset (Xmm6),
	376	context_offset (Xmm7),
	377	context_offset (Xmm8),
	378	context_offset (Xmm9),
	379	context_offset (Xmm10),
	380	context_offset (Xmm11),
	381	context_offset (Xmm12),
	382	context_offset (Xmm13),
	383	context_offset (Xmm14),
	384	context_offset (Xmm15),
	385	/* MXCSR */
	386	context_offset (FloatSave.MxCsr)
	387	};
388	#undef context_offset
389
1c07cc19	390	#endif /* __x86_64__ */
54709339	391
34b34921 PA	392	/* Fetch register from gdbserver regcache data. */
34b34921 PA	393	static void
442ea881 PA	394	i386_fetch_inferior_register (struct regcache *regcache,
442ea881 PA	395	win32_thread_info *th, int r)
34b34921 PA	396	{
	397	char context_offset = (char ) &th->context + mappings[r];
	398
	399	long l;
	400	if (r == FCS_REGNUM)
	401	{
	402	l = ((long ) context_offset) & 0xffff;
442ea881	403	supply_register (regcache, r, (char *) &l);
34b34921 PA	404	}
	405	else if (r == FOP_REGNUM)
	406	{
	407	l = (((long ) context_offset) >> 16) & ((1 << 11) - 1);
442ea881	408	supply_register (regcache, r, (char *) &l);
34b34921 PA	409	}
34b34921 PA	410	else
442ea881	411	supply_register (regcache, r, context_offset);
34b34921 PA	412	}
	413
	414	/* Store a new register value into the thread context of TH. */
	415	static void
442ea881 PA	416	i386_store_inferior_register (struct regcache *regcache,
442ea881 PA	417	win32_thread_info *th, int r)
34b34921 PA	418	{
34b34921 PA	419	char context_offset = (char ) &th->context + mappings[r];
442ea881	420	collect_register (regcache, r, context_offset);
34b34921 PA	421	}
34b34921 PA	422
912cf4ba PA	423	static const unsigned char i386_win32_breakpoint = 0xcc;
	424	#define i386_win32_breakpoint_len 1
	425
54709339	426	static void
3aee8918	427	i386_arch_setup (void)
54709339	428	{
1c07cc19	429	#ifdef __x86_64__
54709339	430	init_registers_amd64 ();
3aee8918	431	win32_tdesc = tdesc_amd64;
54709339 PM	432	#else
54709339 PM	433	init_registers_i386 ();
3aee8918	434	win32_tdesc = tdesc_i386;
54709339 PM	435	#endif
	436	}
	437
68070c10	438	struct win32_target_ops the_low_target = {
3aee8918	439	i386_arch_setup,
68070c10	440	sizeof (mappings) / sizeof (mappings[0]),
34b34921 PA	441	i386_initial_stuff,
	442	i386_get_thread_context,
	443	i386_set_thread_context,
	444	i386_thread_added,
	445	i386_fetch_inferior_register,
	446	i386_store_inferior_register,
	447	i386_single_step,
912cf4ba PA	448	&i386_win32_breakpoint,
912cf4ba PA	449	i386_win32_breakpoint_len,
802e8e6d	450	i386_supports_z_point_type,
aa5ca48f DE	451	i386_insert_point,
	452	i386_remove_point,
	453	i386_stopped_by_watchpoint,
	454	i386_stopped_data_address
68070c10	455	};