[thirdparty/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.  */

static void
i386_dr_low_set_addr (int regnum, CORE_ADDR addr)
{
  gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);

  /* 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;
}

static 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.  */

static void
i386_dr_low_set_control (unsigned long control)
{
  /* 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;
}

static unsigned long
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.  */

static unsigned long
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;
}

/* Low-level function vector.  */
struct i386_dr_low_type i386_dr_low =
  {
    i386_dr_low_set_control,
    i386_dr_low_set_addr,
    i386_dr_low_get_addr,
    i386_dr_low_get_status,
    i386_dr_low_get_control,
    sizeof (void *),
  };

/* 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. */
aa5ca48f DE	47
42995dbd GB	48	static void
42995dbd GB	49	i386_dr_low_set_addr (int regnum, CORE_ADDR addr)
aa5ca48f	50	{
f7160e97	51	gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
aa5ca48f DE	52
	53	/* debug_reg_state.dr_mirror is already set.
	54	Just notify i386_set_thread_context, i386_thread_added
	55	that the registers need to be updated. */
	56	debug_registers_changed = 1;
	57	debug_registers_used = 1;
	58	}
	59
42995dbd	60	static CORE_ADDR
964e4306 PA	61	i386_dr_low_get_addr (int regnum)
964e4306 PA	62	{
0a5b1e09	63	gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
964e4306 PA	64
	65	return debug_reg_state.dr_mirror[regnum];
	66	}
	67
aa5ca48f DE	68	/* Update the inferior's DR7 debug control register from STATE. */
aa5ca48f DE	69
42995dbd GB	70	static void
42995dbd GB	71	i386_dr_low_set_control (unsigned long control)
aa5ca48f DE	72	{
	73	/* debug_reg_state.dr_control_mirror is already set.
	74	Just notify i386_set_thread_context, i386_thread_added
	75	that the registers need to be updated. */
	76	debug_registers_changed = 1;
	77	debug_registers_used = 1;
	78	}
	79
42995dbd	80	static unsigned long
964e4306 PA	81	i386_dr_low_get_control (void)
964e4306 PA	82	{
8d26e50c	83	return debug_reg_state.dr_control_mirror;
964e4306 PA	84	}
964e4306 PA	85
aa5ca48f DE	86	/* Get the value of the DR6 debug status register from the inferior
	87	and record it in STATE. */
	88
42995dbd	89	static unsigned long
964e4306	90	i386_dr_low_get_status (void)
aa5ca48f DE	91	{
	92	/* We don't need to do anything here, the last call to thread_rec for
	93	current_event.dwThreadId id has already set it. */
8d26e50c	94	return debug_reg_state.dr_status_mirror;
aa5ca48f DE	95	}
aa5ca48f DE	96
42995dbd GB	97	/* Low-level function vector. */
	98	struct i386_dr_low_type i386_dr_low =
	99	{
	100	i386_dr_low_set_control,
	101	i386_dr_low_set_addr,
	102	i386_dr_low_get_addr,
	103	i386_dr_low_get_status,
	104	i386_dr_low_get_control,
	105	sizeof (void *),
	106	};
	107
802e8e6d	108	/* Breakpoint/watchpoint support. */
aa5ca48f DE	109
aa5ca48f DE	110	static int
802e8e6d PA	111	i386_supports_z_point_type (char z_type)
	112	{
	113	switch (z_type)
	114	{
	115	case Z_PACKET_WRITE_WP:
	116	case Z_PACKET_ACCESS_WP:
	117	return 1;
	118	default:
	119	return 0;
	120	}
	121	}
	122
	123	static int
	124	i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
	125	int size, struct raw_breakpoint *bp)
aa5ca48f DE	126	{
	127	switch (type)
	128	{
802e8e6d PA	129	case raw_bkpt_type_write_wp:
802e8e6d PA	130	case raw_bkpt_type_access_wp:
a4165e94	131	{
802e8e6d PA	132	enum target_hw_bp_type hw_type
802e8e6d PA	133	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	134
4be83cc2 GB	135	return i386_dr_insert_watchpoint (&debug_reg_state,
4be83cc2 GB	136	hw_type, addr, size);
a4165e94	137	}
aa5ca48f DE	138	default:
	139	/* Unsupported. */
	140	return 1;
	141	}
	142	}
	143
	144	static int
802e8e6d PA	145	i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
802e8e6d PA	146	int size, struct raw_breakpoint *bp)
aa5ca48f DE	147	{
	148	switch (type)
	149	{
802e8e6d PA	150	case raw_bkpt_type_write_wp:
802e8e6d PA	151	case raw_bkpt_type_access_wp:
a4165e94	152	{
802e8e6d PA	153	enum target_hw_bp_type hw_type
802e8e6d PA	154	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	155
4be83cc2 GB	156	return i386_dr_remove_watchpoint (&debug_reg_state,
4be83cc2 GB	157	hw_type, addr, size);
a4165e94	158	}
aa5ca48f DE	159	default:
	160	/* Unsupported. */
	161	return 1;
	162	}
	163	}
	164
	165	static int
	166	i386_stopped_by_watchpoint (void)
	167	{
4be83cc2	168	return i386_dr_stopped_by_watchpoint (&debug_reg_state);
aa5ca48f DE	169	}
	170
	171	static CORE_ADDR
	172	i386_stopped_data_address (void)
	173	{
	174	CORE_ADDR addr;
4be83cc2	175	if (i386_dr_stopped_data_address (&debug_reg_state, &addr))
aa5ca48f DE	176	return addr;
	177	return 0;
	178	}
	179
68070c10	180	static void
34b34921	181	i386_initial_stuff (void)
68070c10	182	{
aa5ca48f	183	i386_low_init_dregs (&debug_reg_state);
34b34921 PA	184	debug_registers_changed = 0;
34b34921 PA	185	debug_registers_used = 0;
68070c10 PA	186	}
	187
	188	static void
34b34921	189	i386_get_thread_context (win32_thread_info th, DEBUG_EVENT current_event)
68070c10	190	{
912cf4ba PA	191	/* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
	192	the system doesn't support extended registers. */
	193	static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;
34b34921	194
912cf4ba PA	195	again:
	196	th->context.ContextFlags = (CONTEXT_FULL
	197	\| CONTEXT_FLOATING_POINT
	198	\| CONTEXT_DEBUG_REGISTERS
	199	\| extended_registers);
	200
	201	if (!GetThreadContext (th->h, &th->context))
	202	{
	203	DWORD e = GetLastError ();
	204
	205	if (extended_registers && e == ERROR_INVALID_PARAMETER)
	206	{
	207	extended_registers = 0;
	208	goto again;
	209	}
	210
	211	error ("GetThreadContext failure %ld\n", (long) e);
	212	}
34b34921 PA	213
	214	debug_registers_changed = 0;
	215
	216	if (th->tid == current_event->dwThreadId)
	217	{
	218	/* Copy dr values from the current thread. */
aa5ca48f DE	219	struct i386_debug_reg_state *dr = &debug_reg_state;
	220	dr->dr_mirror[0] = th->context.Dr0;
	221	dr->dr_mirror[1] = th->context.Dr1;
	222	dr->dr_mirror[2] = th->context.Dr2;
	223	dr->dr_mirror[3] = th->context.Dr3;
8d26e50c JB	224	dr->dr_status_mirror = th->context.Dr6;
8d26e50c JB	225	dr->dr_control_mirror = th->context.Dr7;
34b34921	226	}
68070c10 PA	227	}
	228
	229	static void
34b34921	230	i386_set_thread_context (win32_thread_info th, DEBUG_EVENT current_event)
68070c10	231	{
34b34921 PA	232	if (debug_registers_changed)
34b34921 PA	233	{
aa5ca48f DE	234	struct i386_debug_reg_state *dr = &debug_reg_state;
	235	th->context.Dr0 = dr->dr_mirror[0];
	236	th->context.Dr1 = dr->dr_mirror[1];
	237	th->context.Dr2 = dr->dr_mirror[2];
	238	th->context.Dr3 = dr->dr_mirror[3];
8d26e50c	239	/* th->context.Dr6 = dr->dr_status_mirror;
34b34921	240	FIXME: should we set dr6 also ?? */
8d26e50c	241	th->context.Dr7 = dr->dr_control_mirror;
34b34921 PA	242	}
	243
	244	SetThreadContext (th->h, &th->context);
68070c10 PA	245	}
68070c10 PA	246
68070c10	247	static void
34b34921	248	i386_thread_added (win32_thread_info *th)
68070c10	249	{
34b34921 PA	250	/* Set the debug registers for the new thread if they are used. */
34b34921 PA	251	if (debug_registers_used)
68070c10	252	{
aa5ca48f	253	struct i386_debug_reg_state *dr = &debug_reg_state;
34b34921 PA	254	th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
	255	GetThreadContext (th->h, &th->context);
	256
aa5ca48f DE	257	th->context.Dr0 = dr->dr_mirror[0];
	258	th->context.Dr1 = dr->dr_mirror[1];
	259	th->context.Dr2 = dr->dr_mirror[2];
	260	th->context.Dr3 = dr->dr_mirror[3];
8d26e50c	261	/* th->context.Dr6 = dr->dr_status_mirror;
34b34921	262	FIXME: should we set dr6 also ?? */
8d26e50c	263	th->context.Dr7 = dr->dr_control_mirror;
34b34921 PA	264
	265	SetThreadContext (th->h, &th->context);
	266	th->context.ContextFlags = 0;
68070c10	267	}
68070c10 PA	268	}
	269
	270	static void
34b34921	271	i386_single_step (win32_thread_info *th)
68070c10 PA	272	{
	273	th->context.EFlags \|= FLAG_TRACE_BIT;
	274	}
	275
1c07cc19	276	#ifndef __x86_64__
54709339	277
68070c10 PA	278	/* An array of offset mappings into a Win32 Context structure.
	279	This is a one-to-one mapping which is indexed by gdb's register
	280	numbers. It retrieves an offset into the context structure where
	281	the 4 byte register is located.
	282	An offset value of -1 indicates that Win32 does not provide this
	283	register in it's CONTEXT structure. In this case regptr will return
	284	a pointer into a dummy register. */
	285	#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
	286	static const int mappings[] = {
	287	context_offset (Eax),
	288	context_offset (Ecx),
	289	context_offset (Edx),
	290	context_offset (Ebx),
	291	context_offset (Esp),
	292	context_offset (Ebp),
	293	context_offset (Esi),
	294	context_offset (Edi),
	295	context_offset (Eip),
	296	context_offset (EFlags),
	297	context_offset (SegCs),
	298	context_offset (SegSs),
	299	context_offset (SegDs),
	300	context_offset (SegEs),
	301	context_offset (SegFs),
	302	context_offset (SegGs),
	303	context_offset (FloatSave.RegisterArea[0 * 10]),
	304	context_offset (FloatSave.RegisterArea[1 * 10]),
	305	context_offset (FloatSave.RegisterArea[2 * 10]),
	306	context_offset (FloatSave.RegisterArea[3 * 10]),
	307	context_offset (FloatSave.RegisterArea[4 * 10]),
	308	context_offset (FloatSave.RegisterArea[5 * 10]),
	309	context_offset (FloatSave.RegisterArea[6 * 10]),
	310	context_offset (FloatSave.RegisterArea[7 * 10]),
	311	context_offset (FloatSave.ControlWord),
	312	context_offset (FloatSave.StatusWord),
	313	context_offset (FloatSave.TagWord),
	314	context_offset (FloatSave.ErrorSelector),
	315	context_offset (FloatSave.ErrorOffset),
	316	context_offset (FloatSave.DataSelector),
	317	context_offset (FloatSave.DataOffset),
	318	context_offset (FloatSave.ErrorSelector),
	319	/* XMM0-7 */
	320	context_offset (ExtendedRegisters[10 * 16]),
	321	context_offset (ExtendedRegisters[11 * 16]),
	322	context_offset (ExtendedRegisters[12 * 16]),
	323	context_offset (ExtendedRegisters[13 * 16]),
	324	context_offset (ExtendedRegisters[14 * 16]),
	325	context_offset (ExtendedRegisters[15 * 16]),
	326	context_offset (ExtendedRegisters[16 * 16]),
	327	context_offset (ExtendedRegisters[17 * 16]),
	328	/* MXCSR */
	329	context_offset (ExtendedRegisters[24])
	330	};
	331	#undef context_offset
	332
1c07cc19	333	#else /* __x86_64__ */
54709339 PM	334
	335	#define context_offset(x) (offsetof (CONTEXT, x))
	336	static const int mappings[] =
	337	{
	338	context_offset (Rax),
	339	context_offset (Rbx),
	340	context_offset (Rcx),
	341	context_offset (Rdx),
	342	context_offset (Rsi),
	343	context_offset (Rdi),
	344	context_offset (Rbp),
	345	context_offset (Rsp),
	346	context_offset (R8),
	347	context_offset (R9),
	348	context_offset (R10),
	349	context_offset (R11),
	350	context_offset (R12),
	351	context_offset (R13),
	352	context_offset (R14),
	353	context_offset (R15),
	354	context_offset (Rip),
	355	context_offset (EFlags),
	356	context_offset (SegCs),
	357	context_offset (SegSs),
	358	context_offset (SegDs),
	359	context_offset (SegEs),
	360	context_offset (SegFs),
	361	context_offset (SegGs),
	362	context_offset (FloatSave.FloatRegisters[0]),
	363	context_offset (FloatSave.FloatRegisters[1]),
	364	context_offset (FloatSave.FloatRegisters[2]),
	365	context_offset (FloatSave.FloatRegisters[3]),
	366	context_offset (FloatSave.FloatRegisters[4]),
	367	context_offset (FloatSave.FloatRegisters[5]),
	368	context_offset (FloatSave.FloatRegisters[6]),
	369	context_offset (FloatSave.FloatRegisters[7]),
	370	context_offset (FloatSave.ControlWord),
	371	context_offset (FloatSave.StatusWord),
	372	context_offset (FloatSave.TagWord),
	373	context_offset (FloatSave.ErrorSelector),
	374	context_offset (FloatSave.ErrorOffset),
	375	context_offset (FloatSave.DataSelector),
	376	context_offset (FloatSave.DataOffset),
	377	context_offset (FloatSave.ErrorSelector)
	378	/* XMM0-7 */ ,
	379	context_offset (Xmm0),
	380	context_offset (Xmm1),
	381	context_offset (Xmm2),
	382	context_offset (Xmm3),
	383	context_offset (Xmm4),
	384	context_offset (Xmm5),
	385	context_offset (Xmm6),
	386	context_offset (Xmm7),
	387	context_offset (Xmm8),
	388	context_offset (Xmm9),
	389	context_offset (Xmm10),
	390	context_offset (Xmm11),
	391	context_offset (Xmm12),
	392	context_offset (Xmm13),
	393	context_offset (Xmm14),
	394	context_offset (Xmm15),
	395	/* MXCSR */
	396	context_offset (FloatSave.MxCsr)
	397	};
398	#undef context_offset
399
1c07cc19	400	#endif /* __x86_64__ */
54709339	401
34b34921 PA	402	/* Fetch register from gdbserver regcache data. */
34b34921 PA	403	static void
442ea881 PA	404	i386_fetch_inferior_register (struct regcache *regcache,
442ea881 PA	405	win32_thread_info *th, int r)
34b34921 PA	406	{
	407	char context_offset = (char ) &th->context + mappings[r];
	408
	409	long l;
	410	if (r == FCS_REGNUM)
	411	{
	412	l = ((long ) context_offset) & 0xffff;
442ea881	413	supply_register (regcache, r, (char *) &l);
34b34921 PA	414	}
	415	else if (r == FOP_REGNUM)
	416	{
	417	l = (((long ) context_offset) >> 16) & ((1 << 11) - 1);
442ea881	418	supply_register (regcache, r, (char *) &l);
34b34921 PA	419	}
34b34921 PA	420	else
442ea881	421	supply_register (regcache, r, context_offset);
34b34921 PA	422	}
	423
	424	/* Store a new register value into the thread context of TH. */
	425	static void
442ea881 PA	426	i386_store_inferior_register (struct regcache *regcache,
442ea881 PA	427	win32_thread_info *th, int r)
34b34921 PA	428	{
34b34921 PA	429	char context_offset = (char ) &th->context + mappings[r];
442ea881	430	collect_register (regcache, r, context_offset);
34b34921 PA	431	}
34b34921 PA	432
912cf4ba PA	433	static const unsigned char i386_win32_breakpoint = 0xcc;
	434	#define i386_win32_breakpoint_len 1
	435
54709339	436	static void
3aee8918	437	i386_arch_setup (void)
54709339	438	{
1c07cc19	439	#ifdef __x86_64__
54709339	440	init_registers_amd64 ();
3aee8918	441	win32_tdesc = tdesc_amd64;
54709339 PM	442	#else
54709339 PM	443	init_registers_i386 ();
3aee8918	444	win32_tdesc = tdesc_i386;
54709339 PM	445	#endif
	446	}
	447
68070c10	448	struct win32_target_ops the_low_target = {
3aee8918	449	i386_arch_setup,
68070c10	450	sizeof (mappings) / sizeof (mappings[0]),
34b34921 PA	451	i386_initial_stuff,
	452	i386_get_thread_context,
	453	i386_set_thread_context,
	454	i386_thread_added,
	455	i386_fetch_inferior_register,
	456	i386_store_inferior_register,
	457	i386_single_step,
912cf4ba PA	458	&i386_win32_breakpoint,
912cf4ba PA	459	i386_win32_breakpoint_len,
802e8e6d	460	i386_supports_z_point_type,
aa5ca48f DE	461	i386_insert_point,
	462	i386_remove_point,
	463	i386_stopped_by_watchpoint,
	464	i386_stopped_data_address
68070c10	465	};