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

/* Copyright (C) 2007-2017 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 "x86-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 build-time file gdb/gdbserver/amd64.c.  */
void init_registers_amd64 (void);
extern const struct target_desc *tdesc_amd64;
#else
/* Defined in auto-generated build-time file gdb/gdbserver/i386.c.  */
void init_registers_i386 (void);
extern const struct target_desc *tdesc_i386;
#endif

static struct x86_debug_reg_state debug_reg_state;

static int
update_debug_registers_callback (struct inferior_list_entry *entry,
				 void *pid_p)
{
  struct thread_info *thr = (struct thread_info *) entry;
  win32_thread_info *th = (win32_thread_info *) thread_target_data (thr);
  int pid = *(int *) pid_p;

  /* Only update the threads of this process.  */
  if (pid_of (thr) == pid)
    {
      /* The actual update is done later just before resuming the lwp,
	 we just mark that the registers need updating.  */
      th->debug_registers_changed = 1;
    }

  return 0;
}

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

static void
x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
{
  /* Only update the threads of this process.  */
  int pid = pid_of (current_thread);

  gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);

  find_inferior (&all_threads, update_debug_registers_callback, &pid);
}

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

static void
x86_dr_low_set_control (unsigned long control)
{
  /* Only update the threads of this process.  */
  int pid = pid_of (current_thread);

  find_inferior (&all_threads, update_debug_registers_callback, &pid);
}

/* Return the current value of a DR register of the current thread's
   context.  */

static DWORD64
win32_get_current_dr (int dr)
{
  win32_thread_info *th
    = (win32_thread_info *) thread_target_data (current_thread);

  win32_require_context (th);

#define RET_DR(DR)				\
  case DR:					\
    return th->context.Dr ## DR

  switch (dr)
    {
      RET_DR (0);
      RET_DR (1);
      RET_DR (2);
      RET_DR (3);
      RET_DR (6);
      RET_DR (7);
    }

#undef RET_DR

  gdb_assert_not_reached ("unhandled dr");
}

static CORE_ADDR
x86_dr_low_get_addr (int regnum)
{
  gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);

  return win32_get_current_dr (regnum - DR_FIRSTADDR);
}

static unsigned long
x86_dr_low_get_control (void)
{
  return win32_get_current_dr (7);
}

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

static unsigned long
x86_dr_low_get_status (void)
{
  return win32_get_current_dr (6);
}

/* Low-level function vector.  */
struct x86_dr_low_type x86_dr_low =
  {
    x86_dr_low_set_control,
    x86_dr_low_set_addr,
    x86_dr_low_get_addr,
    x86_dr_low_get_status,
    x86_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 x86_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 x86_dr_remove_watchpoint (&debug_reg_state,
					 hw_type, addr, size);
      }
    default:
      /* Unsupported.  */
      return 1;
    }
}

static int
x86_stopped_by_watchpoint (void)
{
  return x86_dr_stopped_by_watchpoint (&debug_reg_state);
}

static CORE_ADDR
x86_stopped_data_address (void)
{
  CORE_ADDR addr;
  if (x86_dr_stopped_data_address (&debug_reg_state, &addr))
    return addr;
  return 0;
}

static void
i386_initial_stuff (void)
{
  x86_low_init_dregs (&debug_reg_state);
}

static void
i386_get_thread_context (win32_thread_info *th)
{
  /* 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);
    }
}

static void
i386_prepare_to_resume (win32_thread_info *th)
{
  if (th->debug_registers_changed)
    {
      struct x86_debug_reg_state *dr = &debug_reg_state;

      win32_require_context (th);

      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;

      th->debug_registers_changed = 0;
    }
}

static void
i386_thread_added (win32_thread_info *th)
{
  th->debug_registers_changed = 1;
}

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_prepare_to_resume,
  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,
  x86_stopped_by_watchpoint,
  x86_stopped_data_address
};
Commit	Line	Data
61baf725	1	/* Copyright (C) 2007-2017 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"
df7e5265	20	#include "x86-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	31	#ifdef __x86_64__
7dc53023	32	/* Defined in auto-generated build-time file gdb/gdbserver/amd64.c. */
54709339	33	void init_registers_amd64 (void);
3aee8918	34	extern const struct target_desc *tdesc_amd64;
54709339	35	#else
7dc53023	36	/* Defined in auto-generated build-time file gdb/gdbserver/i386.c. */
d05b4ac3	37	void init_registers_i386 (void);
3aee8918	38	extern const struct target_desc *tdesc_i386;
54709339	39	#endif
d05b4ac3	40
df7e5265	41	static struct x86_debug_reg_state debug_reg_state;
68070c10	42
a2abc7de PA	43	static int
	44	update_debug_registers_callback (struct inferior_list_entry *entry,
	45	void *pid_p)
	46	{
	47	struct thread_info thr = (struct thread_info ) entry;
6afd337d	48	win32_thread_info th = (win32_thread_info ) thread_target_data (thr);
a2abc7de PA	49	int pid = (int ) pid_p;
	50
	51	/* Only update the threads of this process. */
	52	if (pid_of (thr) == pid)
	53	{
	54	/* The actual update is done later just before resuming the lwp,
	55	we just mark that the registers need updating. */
	56	th->debug_registers_changed = 1;
	57	}
	58
	59	return 0;
	60	}
34b34921	61
aa5ca48f DE	62	/* Update the inferior's debug register REGNUM from STATE. */
aa5ca48f DE	63
42995dbd	64	static void
df7e5265	65	x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
aa5ca48f	66	{
a2abc7de PA	67	/* Only update the threads of this process. */
a2abc7de PA	68	int pid = pid_of (current_thread);
aa5ca48f	69
0a5b1e09	70	gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
964e4306	71
a2abc7de	72	find_inferior (&all_threads, update_debug_registers_callback, &pid);
964e4306 PA	73	}
964e4306 PA	74
aa5ca48f DE	75	/* Update the inferior's DR7 debug control register from STATE. */
aa5ca48f DE	76
42995dbd	77	static void
df7e5265	78	x86_dr_low_set_control (unsigned long control)
aa5ca48f	79	{
a2abc7de PA	80	/* Only update the threads of this process. */
	81	int pid = pid_of (current_thread);
	82
	83	find_inferior (&all_threads, update_debug_registers_callback, &pid);
	84	}
	85
	86	/* Return the current value of a DR register of the current thread's
	87	context. */
	88
	89	static DWORD64
	90	win32_get_current_dr (int dr)
	91	{
c3de4d92	92	win32_thread_info *th
6afd337d	93	= (win32_thread_info *) thread_target_data (current_thread);
a2abc7de PA	94
	95	win32_require_context (th);
	96
	97	#define RET_DR(DR) \
	98	case DR: \
	99	return th->context.Dr ## DR
	100
	101	switch (dr)
	102	{
	103	RET_DR (0);
	104	RET_DR (1);
	105	RET_DR (2);
	106	RET_DR (3);
	107	RET_DR (6);
	108	RET_DR (7);
	109	}
	110
	111	#undef RET_DR
	112
	113	gdb_assert_not_reached ("unhandled dr");
	114	}
	115
	116	static CORE_ADDR
	117	x86_dr_low_get_addr (int regnum)
	118	{
	119	gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
	120
	121	return win32_get_current_dr (regnum - DR_FIRSTADDR);
aa5ca48f DE	122	}
aa5ca48f DE	123
42995dbd	124	static unsigned long
df7e5265	125	x86_dr_low_get_control (void)
964e4306	126	{
a2abc7de	127	return win32_get_current_dr (7);
964e4306 PA	128	}
964e4306 PA	129
aa5ca48f DE	130	/* Get the value of the DR6 debug status register from the inferior
	131	and record it in STATE. */
	132
42995dbd	133	static unsigned long
df7e5265	134	x86_dr_low_get_status (void)
aa5ca48f	135	{
a2abc7de	136	return win32_get_current_dr (6);
aa5ca48f DE	137	}
aa5ca48f DE	138
42995dbd	139	/* Low-level function vector. */
df7e5265	140	struct x86_dr_low_type x86_dr_low =
42995dbd	141	{
df7e5265 GB	142	x86_dr_low_set_control,
	143	x86_dr_low_set_addr,
	144	x86_dr_low_get_addr,
	145	x86_dr_low_get_status,
	146	x86_dr_low_get_control,
42995dbd GB	147	sizeof (void *),
	148	};
	149
802e8e6d	150	/* Breakpoint/watchpoint support. */
aa5ca48f DE	151
aa5ca48f DE	152	static int
802e8e6d PA	153	i386_supports_z_point_type (char z_type)
	154	{
	155	switch (z_type)
	156	{
	157	case Z_PACKET_WRITE_WP:
	158	case Z_PACKET_ACCESS_WP:
	159	return 1;
	160	default:
	161	return 0;
	162	}
	163	}
	164
	165	static int
	166	i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
	167	int size, struct raw_breakpoint *bp)
aa5ca48f DE	168	{
	169	switch (type)
	170	{
802e8e6d PA	171	case raw_bkpt_type_write_wp:
802e8e6d PA	172	case raw_bkpt_type_access_wp:
a4165e94	173	{
802e8e6d PA	174	enum target_hw_bp_type hw_type
802e8e6d PA	175	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	176
df7e5265 GB	177	return x86_dr_insert_watchpoint (&debug_reg_state,
df7e5265 GB	178	hw_type, addr, size);
a4165e94	179	}
aa5ca48f DE	180	default:
	181	/* Unsupported. */
	182	return 1;
	183	}
	184	}
	185
	186	static int
802e8e6d PA	187	i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
802e8e6d PA	188	int size, struct raw_breakpoint *bp)
aa5ca48f DE	189	{
	190	switch (type)
	191	{
802e8e6d PA	192	case raw_bkpt_type_write_wp:
802e8e6d PA	193	case raw_bkpt_type_access_wp:
a4165e94	194	{
802e8e6d PA	195	enum target_hw_bp_type hw_type
802e8e6d PA	196	= raw_bkpt_type_to_target_hw_bp_type (type);
a4165e94	197
df7e5265 GB	198	return x86_dr_remove_watchpoint (&debug_reg_state,
df7e5265 GB	199	hw_type, addr, size);
a4165e94	200	}
aa5ca48f DE	201	default:
	202	/* Unsupported. */
	203	return 1;
	204	}
	205	}
	206
	207	static int
df7e5265	208	x86_stopped_by_watchpoint (void)
aa5ca48f	209	{
df7e5265	210	return x86_dr_stopped_by_watchpoint (&debug_reg_state);
aa5ca48f DE	211	}
	212
	213	static CORE_ADDR
df7e5265	214	x86_stopped_data_address (void)
aa5ca48f DE	215	{
aa5ca48f DE	216	CORE_ADDR addr;
df7e5265	217	if (x86_dr_stopped_data_address (&debug_reg_state, &addr))
aa5ca48f DE	218	return addr;
	219	return 0;
	220	}
	221
68070c10	222	static void
34b34921	223	i386_initial_stuff (void)
68070c10	224	{
df7e5265	225	x86_low_init_dregs (&debug_reg_state);
68070c10 PA	226	}
	227
	228	static void
a2abc7de	229	i386_get_thread_context (win32_thread_info *th)
68070c10	230	{
912cf4ba PA	231	/* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
	232	the system doesn't support extended registers. */
	233	static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;
34b34921	234
912cf4ba PA	235	again:
	236	th->context.ContextFlags = (CONTEXT_FULL
	237	\| CONTEXT_FLOATING_POINT
	238	\| CONTEXT_DEBUG_REGISTERS
	239	\| extended_registers);
	240
	241	if (!GetThreadContext (th->h, &th->context))
	242	{
	243	DWORD e = GetLastError ();
	244
	245	if (extended_registers && e == ERROR_INVALID_PARAMETER)
	246	{
	247	extended_registers = 0;
	248	goto again;
	249	}
	250
	251	error ("GetThreadContext failure %ld\n", (long) e);
	252	}
68070c10 PA	253	}
	254
	255	static void
a2abc7de	256	i386_prepare_to_resume (win32_thread_info *th)
68070c10	257	{
a2abc7de	258	if (th->debug_registers_changed)
34b34921	259	{
df7e5265	260	struct x86_debug_reg_state *dr = &debug_reg_state;
a2abc7de PA	261
	262	win32_require_context (th);
	263
aa5ca48f DE	264	th->context.Dr0 = dr->dr_mirror[0];
	265	th->context.Dr1 = dr->dr_mirror[1];
	266	th->context.Dr2 = dr->dr_mirror[2];
	267	th->context.Dr3 = dr->dr_mirror[3];
8d26e50c	268	/* th->context.Dr6 = dr->dr_status_mirror;
34b34921	269	FIXME: should we set dr6 also ?? */
8d26e50c	270	th->context.Dr7 = dr->dr_control_mirror;
34b34921	271
a2abc7de PA	272	th->debug_registers_changed = 0;
a2abc7de PA	273	}
68070c10 PA	274	}
68070c10 PA	275
68070c10	276	static void
34b34921	277	i386_thread_added (win32_thread_info *th)
68070c10	278	{
a2abc7de	279	th->debug_registers_changed = 1;
68070c10 PA	280	}
	281
	282	static void
34b34921	283	i386_single_step (win32_thread_info *th)
68070c10 PA	284	{
	285	th->context.EFlags \|= FLAG_TRACE_BIT;
	286	}
	287
1c07cc19	288	#ifndef __x86_64__
54709339	289
68070c10 PA	290	/* An array of offset mappings into a Win32 Context structure.
	291	This is a one-to-one mapping which is indexed by gdb's register
	292	numbers. It retrieves an offset into the context structure where
	293	the 4 byte register is located.
	294	An offset value of -1 indicates that Win32 does not provide this
	295	register in it's CONTEXT structure. In this case regptr will return
	296	a pointer into a dummy register. */
	297	#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
	298	static const int mappings[] = {
	299	context_offset (Eax),
	300	context_offset (Ecx),
	301	context_offset (Edx),
	302	context_offset (Ebx),
	303	context_offset (Esp),
	304	context_offset (Ebp),
	305	context_offset (Esi),
	306	context_offset (Edi),
	307	context_offset (Eip),
	308	context_offset (EFlags),
	309	context_offset (SegCs),
	310	context_offset (SegSs),
	311	context_offset (SegDs),
	312	context_offset (SegEs),
	313	context_offset (SegFs),
	314	context_offset (SegGs),
	315	context_offset (FloatSave.RegisterArea[0 * 10]),
	316	context_offset (FloatSave.RegisterArea[1 * 10]),
	317	context_offset (FloatSave.RegisterArea[2 * 10]),
	318	context_offset (FloatSave.RegisterArea[3 * 10]),
	319	context_offset (FloatSave.RegisterArea[4 * 10]),
	320	context_offset (FloatSave.RegisterArea[5 * 10]),
	321	context_offset (FloatSave.RegisterArea[6 * 10]),
	322	context_offset (FloatSave.RegisterArea[7 * 10]),
	323	context_offset (FloatSave.ControlWord),
	324	context_offset (FloatSave.StatusWord),
	325	context_offset (FloatSave.TagWord),
	326	context_offset (FloatSave.ErrorSelector),
	327	context_offset (FloatSave.ErrorOffset),
	328	context_offset (FloatSave.DataSelector),
	329	context_offset (FloatSave.DataOffset),
	330	context_offset (FloatSave.ErrorSelector),
	331	/* XMM0-7 */
	332	context_offset (ExtendedRegisters[10 * 16]),
	333	context_offset (ExtendedRegisters[11 * 16]),
	334	context_offset (ExtendedRegisters[12 * 16]),
	335	context_offset (ExtendedRegisters[13 * 16]),
	336	context_offset (ExtendedRegisters[14 * 16]),
	337	context_offset (ExtendedRegisters[15 * 16]),
	338	context_offset (ExtendedRegisters[16 * 16]),
	339	context_offset (ExtendedRegisters[17 * 16]),
	340	/* MXCSR */
	341	context_offset (ExtendedRegisters[24])
	342	};
	343	#undef context_offset
	344
1c07cc19	345	#else /* __x86_64__ */
54709339 PM	346
	347	#define context_offset(x) (offsetof (CONTEXT, x))
	348	static const int mappings[] =
	349	{
	350	context_offset (Rax),
	351	context_offset (Rbx),
	352	context_offset (Rcx),
	353	context_offset (Rdx),
	354	context_offset (Rsi),
	355	context_offset (Rdi),
	356	context_offset (Rbp),
	357	context_offset (Rsp),
	358	context_offset (R8),
	359	context_offset (R9),
	360	context_offset (R10),
	361	context_offset (R11),
	362	context_offset (R12),
	363	context_offset (R13),
	364	context_offset (R14),
	365	context_offset (R15),
	366	context_offset (Rip),
	367	context_offset (EFlags),
	368	context_offset (SegCs),
	369	context_offset (SegSs),
	370	context_offset (SegDs),
	371	context_offset (SegEs),
	372	context_offset (SegFs),
	373	context_offset (SegGs),
	374	context_offset (FloatSave.FloatRegisters[0]),
	375	context_offset (FloatSave.FloatRegisters[1]),
	376	context_offset (FloatSave.FloatRegisters[2]),
	377	context_offset (FloatSave.FloatRegisters[3]),
	378	context_offset (FloatSave.FloatRegisters[4]),
	379	context_offset (FloatSave.FloatRegisters[5]),
	380	context_offset (FloatSave.FloatRegisters[6]),
	381	context_offset (FloatSave.FloatRegisters[7]),
	382	context_offset (FloatSave.ControlWord),
	383	context_offset (FloatSave.StatusWord),
	384	context_offset (FloatSave.TagWord),
	385	context_offset (FloatSave.ErrorSelector),
	386	context_offset (FloatSave.ErrorOffset),
	387	context_offset (FloatSave.DataSelector),
	388	context_offset (FloatSave.DataOffset),
	389	context_offset (FloatSave.ErrorSelector)
	390	/* XMM0-7 */ ,
	391	context_offset (Xmm0),
	392	context_offset (Xmm1),
	393	context_offset (Xmm2),
	394	context_offset (Xmm3),
	395	context_offset (Xmm4),
	396	context_offset (Xmm5),
	397	context_offset (Xmm6),
	398	context_offset (Xmm7),
	399	context_offset (Xmm8),
	400	context_offset (Xmm9),
	401	context_offset (Xmm10),
	402	context_offset (Xmm11),
	403	context_offset (Xmm12),
	404	context_offset (Xmm13),
	405	context_offset (Xmm14),
	406	context_offset (Xmm15),
	407	/* MXCSR */
	408	context_offset (FloatSave.MxCsr)
	409	};
410	#undef context_offset
411
1c07cc19	412	#endif /* __x86_64__ */
54709339	413
34b34921 PA	414	/* Fetch register from gdbserver regcache data. */
34b34921 PA	415	static void
442ea881 PA	416	i386_fetch_inferior_register (struct regcache *regcache,
442ea881 PA	417	win32_thread_info *th, int r)
34b34921 PA	418	{
	419	char context_offset = (char ) &th->context + mappings[r];
	420
	421	long l;
	422	if (r == FCS_REGNUM)
	423	{
	424	l = ((long ) context_offset) & 0xffff;
442ea881	425	supply_register (regcache, r, (char *) &l);
34b34921 PA	426	}
	427	else if (r == FOP_REGNUM)
	428	{
	429	l = (((long ) context_offset) >> 16) & ((1 << 11) - 1);
442ea881	430	supply_register (regcache, r, (char *) &l);
34b34921 PA	431	}
34b34921 PA	432	else
442ea881	433	supply_register (regcache, r, context_offset);
34b34921 PA	434	}
	435
	436	/* Store a new register value into the thread context of TH. */
	437	static void
442ea881 PA	438	i386_store_inferior_register (struct regcache *regcache,
442ea881 PA	439	win32_thread_info *th, int r)
34b34921 PA	440	{
34b34921 PA	441	char context_offset = (char ) &th->context + mappings[r];
442ea881	442	collect_register (regcache, r, context_offset);
34b34921 PA	443	}
34b34921 PA	444
912cf4ba PA	445	static const unsigned char i386_win32_breakpoint = 0xcc;
	446	#define i386_win32_breakpoint_len 1
	447
54709339	448	static void
3aee8918	449	i386_arch_setup (void)
54709339	450	{
1c07cc19	451	#ifdef __x86_64__
54709339	452	init_registers_amd64 ();
3aee8918	453	win32_tdesc = tdesc_amd64;
54709339 PM	454	#else
54709339 PM	455	init_registers_i386 ();
3aee8918	456	win32_tdesc = tdesc_i386;
54709339 PM	457	#endif
	458	}
	459
68070c10	460	struct win32_target_ops the_low_target = {
3aee8918	461	i386_arch_setup,
68070c10	462	sizeof (mappings) / sizeof (mappings[0]),
34b34921 PA	463	i386_initial_stuff,
34b34921 PA	464	i386_get_thread_context,
a2abc7de	465	i386_prepare_to_resume,
34b34921 PA	466	i386_thread_added,
	467	i386_fetch_inferior_register,
	468	i386_store_inferior_register,
	469	i386_single_step,
912cf4ba PA	470	&i386_win32_breakpoint,
912cf4ba PA	471	i386_win32_breakpoint_len,
802e8e6d	472	i386_supports_z_point_type,
aa5ca48f DE	473	i386_insert_point,
aa5ca48f DE	474	i386_remove_point,
df7e5265 GB	475	x86_stopped_by_watchpoint,
df7e5265 GB	476	x86_stopped_data_address
68070c10	477	};