[deliverable/binutils-gdb.git] / gdb / i386-darwin-nat.c

/* Darwin support for GDB, the GNU debugger.
   Copyright (C) 1997-2014 Free Software Foundation, Inc.

   Contributed by Apple Computer, 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 "defs.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
#include "symfile.h"
#include "symtab.h"
#include "objfiles.h"
#include "gdbcmd.h"
#include "regcache.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "gdbarch.h"
#include "arch-utils.h"
#include "gdbcore.h"

#include "x86-nat.h"
#include "darwin-nat.h"
#include "i386-darwin-tdep.h"

#ifdef BFD64
#include "amd64-nat.h"
#include "amd64-tdep.h"
#include "amd64-darwin-tdep.h"
#endif

/* Read register values from the inferior process.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */
static void
i386_darwin_fetch_inferior_registers (struct target_ops *ops,
				      struct regcache *regcache, int regno)
{
  thread_t current_thread = ptid_get_tid (inferior_ptid);
  int fetched = 0;
  struct gdbarch *gdbarch = get_regcache_arch (regcache);

#ifdef BFD64
  if (gdbarch_ptr_bit (gdbarch) == 64)
    {
      if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
        {
          x86_thread_state_t gp_regs;
          unsigned int gp_count = x86_THREAD_STATE_COUNT;
          kern_return_t ret;

	  ret = thread_get_state
            (current_thread, x86_THREAD_STATE, (thread_state_t) & gp_regs,
             &gp_count);
	  if (ret != KERN_SUCCESS)
	    {
	      printf_unfiltered (_("Error calling thread_get_state for "
				   "GP registers for thread 0x%lx\n"),
				 (unsigned long) current_thread);
	      MACH_CHECK_ERROR (ret);
	    }
	  amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
          fetched++;
        }

      if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
        {
          x86_float_state_t fp_regs;
          unsigned int fp_count = x86_FLOAT_STATE_COUNT;
          kern_return_t ret;

	  ret = thread_get_state
            (current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
             &fp_count);
	  if (ret != KERN_SUCCESS)
	    {
	      printf_unfiltered (_("Error calling thread_get_state for "
				   "float registers for thread 0x%lx\n"),
				 (unsigned long) current_thread);
	      MACH_CHECK_ERROR (ret);
	    }
          amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);
          fetched++;
        }
    }
  else
#endif
    {
      if (regno == -1 || regno < I386_NUM_GREGS)
        {
          x86_thread_state32_t gp_regs;
          unsigned int gp_count = x86_THREAD_STATE32_COUNT;
          kern_return_t ret;
	  int i;

	  ret = thread_get_state
            (current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
             &gp_count);
	  if (ret != KERN_SUCCESS)
	    {
	      printf_unfiltered (_("Error calling thread_get_state for "
				   "GP registers for thread 0x%lx\n"),
				 (unsigned long) current_thread);
	      MACH_CHECK_ERROR (ret);
	    }
	  for (i = 0; i < I386_NUM_GREGS; i++)
	    regcache_raw_supply
	      (regcache, i,
	       (char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);

          fetched++;
        }

      if (regno == -1
	  || (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
        {
          x86_float_state32_t fp_regs;
          unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
          kern_return_t ret;

	  ret = thread_get_state
            (current_thread, x86_FLOAT_STATE32, (thread_state_t) &fp_regs,
             &fp_count);
	  if (ret != KERN_SUCCESS)
	    {
	      printf_unfiltered (_("Error calling thread_get_state for "
				   "float registers for thread 0x%lx\n"),
				 (unsigned long) current_thread);
	      MACH_CHECK_ERROR (ret);
	    }
          i387_supply_fxsave (regcache, -1, &fp_regs.__fpu_fcw);
          fetched++;
        }
    }

  if (! fetched)
    {
      warning (_("unknown register %d"), regno);
      regcache_raw_supply (regcache, regno, NULL);
    }
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

static void
i386_darwin_store_inferior_registers (struct target_ops *ops,
				      struct regcache *regcache, int regno)
{
  thread_t current_thread = ptid_get_tid (inferior_ptid);
  struct gdbarch *gdbarch = get_regcache_arch (regcache);

#ifdef BFD64
  if (gdbarch_ptr_bit (gdbarch) == 64)
    {
      if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
        {
          x86_thread_state_t gp_regs;
          kern_return_t ret;
	  unsigned int gp_count = x86_THREAD_STATE_COUNT;

	  ret = thread_get_state
	    (current_thread, x86_THREAD_STATE, (thread_state_t) &gp_regs,
	     &gp_count);
          MACH_CHECK_ERROR (ret);
	  gdb_assert (gp_regs.tsh.flavor == x86_THREAD_STATE64);
          gdb_assert (gp_regs.tsh.count == x86_THREAD_STATE64_COUNT);

	  amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);

          ret = thread_set_state (current_thread, x86_THREAD_STATE,
                                  (thread_state_t) &gp_regs,
                                  x86_THREAD_STATE_COUNT);
          MACH_CHECK_ERROR (ret);
        }

      if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
        {
          x86_float_state_t fp_regs;
          kern_return_t ret;
	  unsigned int fp_count = x86_FLOAT_STATE_COUNT;

	  ret = thread_get_state
	    (current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
	     &fp_count);
          MACH_CHECK_ERROR (ret);
          gdb_assert (fp_regs.fsh.flavor == x86_FLOAT_STATE64);
          gdb_assert (fp_regs.fsh.count == x86_FLOAT_STATE64_COUNT);

	  amd64_collect_fxsave (regcache, regno, &fp_regs.ufs.fs64.__fpu_fcw);

	  ret = thread_set_state (current_thread, x86_FLOAT_STATE,
				  (thread_state_t) & fp_regs,
				  x86_FLOAT_STATE_COUNT);
	  MACH_CHECK_ERROR (ret);
        }
    }
  else
#endif
    {
      if (regno == -1 || regno < I386_NUM_GREGS)
        {
          x86_thread_state32_t gp_regs;
          kern_return_t ret;
          unsigned int gp_count = x86_THREAD_STATE32_COUNT;
	  int i;

          ret = thread_get_state
            (current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
             &gp_count);
	  MACH_CHECK_ERROR (ret);

	  for (i = 0; i < I386_NUM_GREGS; i++)
	    if (regno == -1 || regno == i)
	      regcache_raw_collect
		(regcache, i,
		 (char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);

          ret = thread_set_state (current_thread, x86_THREAD_STATE32,
                                  (thread_state_t) &gp_regs,
                                  x86_THREAD_STATE32_COUNT);
          MACH_CHECK_ERROR (ret);
        }

      if (regno == -1
	  || (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
        {
          x86_float_state32_t fp_regs;
          unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
          kern_return_t ret;

	  ret = thread_get_state
            (current_thread, x86_FLOAT_STATE32, (thread_state_t) & fp_regs,
             &fp_count);
	  MACH_CHECK_ERROR (ret);

	  i387_collect_fxsave (regcache, regno, &fp_regs.__fpu_fcw);

	  ret = thread_set_state (current_thread, x86_FLOAT_STATE32,
				  (thread_state_t) &fp_regs,
				  x86_FLOAT_STATE32_COUNT);
	  MACH_CHECK_ERROR (ret);
        }
    }
}

/* Support for debug registers, boosted mostly from i386-linux-nat.c.  */

static void
i386_darwin_dr_set (int regnum, CORE_ADDR value)
{
  int current_pid;
  thread_t current_thread;
  x86_debug_state_t dr_regs;
  kern_return_t ret;
  unsigned int dr_count;

  gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);

  current_thread = ptid_get_tid (inferior_ptid);

  dr_regs.dsh.flavor = x86_DEBUG_STATE;
  dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
  dr_count = x86_DEBUG_STATE_COUNT;
  ret = thread_get_state (current_thread, x86_DEBUG_STATE,
                          (thread_state_t) &dr_regs, &dr_count);
  MACH_CHECK_ERROR (ret);

  switch (dr_regs.dsh.flavor)
    {
    case x86_DEBUG_STATE32:
      switch (regnum)
	{
	case 0:
	  dr_regs.uds.ds32.__dr0 = value;
	  break;
	case 1:
	  dr_regs.uds.ds32.__dr1 = value;
	  break;
	case 2:
	  dr_regs.uds.ds32.__dr2 = value;
	  break;
	case 3:
	  dr_regs.uds.ds32.__dr3 = value;
	  break;
	case 4:
	  dr_regs.uds.ds32.__dr4 = value;
	  break;
	case 5:
	  dr_regs.uds.ds32.__dr5 = value;
	  break;
	case 6:
	  dr_regs.uds.ds32.__dr6 = value;
	  break;
	case 7:
	  dr_regs.uds.ds32.__dr7 = value;
	  break;
	}
      break;
#ifdef BFD64
    case x86_DEBUG_STATE64:
      switch (regnum)
	{
	case 0:
	  dr_regs.uds.ds64.__dr0 = value;
	  break;
	case 1:
	  dr_regs.uds.ds64.__dr1 = value;
	  break;
	case 2:
	  dr_regs.uds.ds64.__dr2 = value;
	  break;
	case 3:
	  dr_regs.uds.ds64.__dr3 = value;
	  break;
	case 4:
	  dr_regs.uds.ds64.__dr4 = value;
	  break;
	case 5:
	  dr_regs.uds.ds64.__dr5 = value;
	  break;
	case 6:
	  dr_regs.uds.ds64.__dr6 = value;
	  break;
	case 7:
	  dr_regs.uds.ds64.__dr7 = value;
	  break;
	}
      break;
#endif
    }

  ret = thread_set_state (current_thread, dr_regs.dsh.flavor,
                          (thread_state_t) &dr_regs.uds, dr_count);

  MACH_CHECK_ERROR (ret);
}

static CORE_ADDR
i386_darwin_dr_get (int regnum)
{
  thread_t current_thread;
  x86_debug_state_t dr_regs;
  kern_return_t ret;
  unsigned int dr_count;

  gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);

  current_thread = ptid_get_tid (inferior_ptid);

  dr_regs.dsh.flavor = x86_DEBUG_STATE;
  dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
  dr_count = x86_DEBUG_STATE_COUNT;
  ret = thread_get_state (current_thread, x86_DEBUG_STATE,
                          (thread_state_t) &dr_regs, &dr_count);
  MACH_CHECK_ERROR (ret);

  switch (dr_regs.dsh.flavor)
    {
    case x86_DEBUG_STATE32:
      switch (regnum)
	{
	case 0:
	  return dr_regs.uds.ds32.__dr0;
	case 1:
	  return dr_regs.uds.ds32.__dr1;
	case 2:
	  return dr_regs.uds.ds32.__dr2;
	case 3:
	  return dr_regs.uds.ds32.__dr3;
	case 4:
	  return dr_regs.uds.ds32.__dr4;
	case 5:
	  return dr_regs.uds.ds32.__dr5;
	case 6:
	  return dr_regs.uds.ds32.__dr6;
	case 7:
	  return dr_regs.uds.ds32.__dr7;
	default:
	  return -1;
	}
      break;
#ifdef BFD64
    case x86_DEBUG_STATE64:
      switch (regnum)
	{
	case 0:
	  return dr_regs.uds.ds64.__dr0;
	case 1:
	  return dr_regs.uds.ds64.__dr1;
	case 2:
	  return dr_regs.uds.ds64.__dr2;
	case 3:
	  return dr_regs.uds.ds64.__dr3;
	case 4:
	  return dr_regs.uds.ds64.__dr4;
	case 5:
	  return dr_regs.uds.ds64.__dr5;
	case 6:
	  return dr_regs.uds.ds64.__dr6;
	case 7:
	  return dr_regs.uds.ds64.__dr7;
	default:
	  return -1;
	}
      break;
#endif
    default:
      return -1;
    }
}

static void
i386_darwin_dr_set_control (unsigned long control)
{
  i386_darwin_dr_set (DR_CONTROL, control);
}

static void
i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
{
  gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);

  i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
}

static CORE_ADDR
i386_darwin_dr_get_addr (int regnum)
{
  return i386_darwin_dr_get (regnum);
}

static unsigned long
i386_darwin_dr_get_status (void)
{
  return i386_darwin_dr_get (DR_STATUS);
}

static unsigned long
i386_darwin_dr_get_control (void)
{
  return i386_darwin_dr_get (DR_CONTROL);
}

void
darwin_check_osabi (darwin_inferior *inf, thread_t thread)
{
  if (gdbarch_osabi (target_gdbarch ()) == GDB_OSABI_UNKNOWN)
    {
      /* Attaching to a process.  Let's figure out what kind it is.  */
      x86_thread_state_t gp_regs;
      struct gdbarch_info info;
      unsigned int gp_count = x86_THREAD_STATE_COUNT;
      kern_return_t ret;

      ret = thread_get_state (thread, x86_THREAD_STATE,
			      (thread_state_t) &gp_regs, &gp_count);
      if (ret != KERN_SUCCESS)
	{
	  MACH_CHECK_ERROR (ret);
	  return;
	}

      gdbarch_info_init (&info);
      gdbarch_info_fill (&info);
      info.byte_order = gdbarch_byte_order (target_gdbarch ());
      info.osabi = GDB_OSABI_DARWIN;
      if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
					      bfd_mach_x86_64);
      else
	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
					      bfd_mach_i386_i386);
      gdbarch_update_p (info);
    }
}

#define X86_EFLAGS_T 0x100UL

/* Returning from a signal trampoline is done by calling a
   special system call (sigreturn).  This system call
   restores the registers that were saved when the signal was
   raised, including %eflags/%rflags.  That means that single-stepping
   won't work.  Instead, we'll have to modify the signal context
   that's about to be restored, and set the trace flag there.  */

static int
i386_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
  static const gdb_byte darwin_syscall[] = { 0xcd, 0x80 }; /* int 0x80 */
  gdb_byte buf[sizeof (darwin_syscall)];

  /* Check if PC is at a sigreturn system call.  */
  if (target_read_memory (regs->uts.ts32.__eip, buf, sizeof (buf)) == 0
      && memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
      && regs->uts.ts32.__eax == 0xb8 /* SYS_sigreturn */)
    {
      ULONGEST uctx_addr;
      ULONGEST mctx_addr;
      ULONGEST flags_addr;
      unsigned int eflags;

      uctx_addr = read_memory_unsigned_integer
		    (regs->uts.ts32.__esp + 4, 4, byte_order);
      mctx_addr = read_memory_unsigned_integer
		    (uctx_addr + 28, 4, byte_order);

      flags_addr = mctx_addr + 12 + 9 * 4;
      read_memory (flags_addr, (gdb_byte *) &eflags, 4);
      eflags |= X86_EFLAGS_T;
      write_memory (flags_addr, (gdb_byte *) &eflags, 4);

      return 1;
    }
  return 0;
}

#ifdef BFD64
static int
amd64_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
  static const gdb_byte darwin_syscall[] = { 0x0f, 0x05 }; /* syscall */
  gdb_byte buf[sizeof (darwin_syscall)];

  /* Check if PC is at a sigreturn system call.  */
  if (target_read_memory (regs->uts.ts64.__rip, buf, sizeof (buf)) == 0
      && memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
      && (regs->uts.ts64.__rax & 0xffffffff) == 0x20000b8 /* SYS_sigreturn */)
    {
      ULONGEST mctx_addr;
      ULONGEST flags_addr;
      unsigned int rflags;

      mctx_addr = read_memory_unsigned_integer
		    (regs->uts.ts64.__rdi + 48, 8, byte_order);
      flags_addr = mctx_addr + 16 + 17 * 8;

      /* AMD64 is little endian.  */
      read_memory (flags_addr, (gdb_byte *) &rflags, 4);
      rflags |= X86_EFLAGS_T;
      write_memory (flags_addr, (gdb_byte *) &rflags, 4);

      return 1;
    }
  return 0;
}
#endif

void
darwin_set_sstep (thread_t thread, int enable)
{
  x86_thread_state_t regs;
  unsigned int count = x86_THREAD_STATE_COUNT;
  kern_return_t kret;

  kret = thread_get_state (thread, x86_THREAD_STATE,
			   (thread_state_t) &regs, &count);
  if (kret != KERN_SUCCESS)
    {
      printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
			 kret, thread);
      return;
    }

  switch (regs.tsh.flavor)
    {
    case x86_THREAD_STATE32:
      {
	__uint32_t bit = enable ? X86_EFLAGS_T : 0;

	if (enable && i386_darwin_sstep_at_sigreturn (&regs))
	  return;
	if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
	  return;
	regs.uts.ts32.__eflags
	  = (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) | bit;
	kret = thread_set_state (thread, x86_THREAD_STATE,
				 (thread_state_t) &regs, count);
	MACH_CHECK_ERROR (kret);
      }
      break;
#ifdef BFD64
    case x86_THREAD_STATE64:
      {
	__uint64_t bit = enable ? X86_EFLAGS_T : 0;

	if (enable && amd64_darwin_sstep_at_sigreturn (&regs))
	  return;
	if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
	  return;
	regs.uts.ts64.__rflags
	  = (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
	kret = thread_set_state (thread, x86_THREAD_STATE,
				 (thread_state_t) &regs, count);
	MACH_CHECK_ERROR (kret);
      }
      break;
#endif
    default:
      error (_("darwin_set_sstep: unknown flavour: %d"), regs.tsh.flavor);
    }
}

void
darwin_complete_target (struct target_ops *target)
{
#ifdef BFD64
  amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
  amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
  amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
  amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;
#endif

  x86_use_watchpoints (target);

  x86_dr_low.set_control = i386_darwin_dr_set_control;
  x86_dr_low.set_addr = i386_darwin_dr_set_addr;
  x86_dr_low.get_addr = i386_darwin_dr_get_addr;
  x86_dr_low.get_status = i386_darwin_dr_get_status;
  x86_dr_low.get_control = i386_darwin_dr_get_control;

  /* Let's assume that the kernel is 64 bits iff the executable is.  */
#ifdef __x86_64__
  x86_set_debug_register_length (8);
#else
  x86_set_debug_register_length (4);
#endif

  target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
  target->to_store_registers = i386_darwin_store_inferior_registers;
}
Commit	Line	Data
a80b95ba	1	/* Darwin support for GDB, the GNU debugger.
ecd75fc8	2	Copyright (C) 1997-2014 Free Software Foundation, Inc.
a80b95ba TG	3
	4	Contributed by Apple Computer, Inc.
	5
	6	This file is part of GDB.
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 3 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	20
	21	#include "defs.h"
	22	#include "frame.h"
	23	#include "inferior.h"
	24	#include "target.h"
	25	#include "symfile.h"
	26	#include "symtab.h"
	27	#include "objfiles.h"
	28	#include "gdbcmd.h"
	29	#include "regcache.h"
a80b95ba	30	#include "i386-tdep.h"
a80b95ba TG	31	#include "i387-tdep.h"
	32	#include "gdbarch.h"
	33	#include "arch-utils.h"
acdb24a9	34	#include "gdbcore.h"
a80b95ba	35
df7e5265	36	#include "x86-nat.h"
a80b95ba TG	37	#include "darwin-nat.h"
	38	#include "i386-darwin-tdep.h"
	39
5cd226f2 TG	40	#ifdef BFD64
5cd226f2 TG	41	#include "amd64-nat.h"
46187dff	42	#include "amd64-tdep.h"
5cd226f2 TG	43	#include "amd64-darwin-tdep.h"
	44	#endif
	45
a80b95ba TG	46	/* Read register values from the inferior process.
	47	If REGNO is -1, do this for all registers.
	48	Otherwise, REGNO specifies which register (so we can save time). */
	49	static void
28439f5e PA	50	i386_darwin_fetch_inferior_registers (struct target_ops *ops,
28439f5e PA	51	struct regcache *regcache, int regno)
a80b95ba TG	52	{
	53	thread_t current_thread = ptid_get_tid (inferior_ptid);
	54	int fetched = 0;
	55	struct gdbarch *gdbarch = get_regcache_arch (regcache);
	56
5cd226f2	57	#ifdef BFD64
a80b95ba TG	58	if (gdbarch_ptr_bit (gdbarch) == 64)
	59	{
	60	if (regno == -1 \|\| amd64_native_gregset_supplies_p (gdbarch, regno))
	61	{
	62	x86_thread_state_t gp_regs;
	63	unsigned int gp_count = x86_THREAD_STATE_COUNT;
	64	kern_return_t ret;
	65
	66	ret = thread_get_state
	67	(current_thread, x86_THREAD_STATE, (thread_state_t) & gp_regs,
	68	&gp_count);
	69	if (ret != KERN_SUCCESS)
	70	{
1777feb0	71	printf_unfiltered (_("Error calling thread_get_state for "
17092398	72	"GP registers for thread 0x%lx\n"),
016b7430	73	(unsigned long) current_thread);
a80b95ba TG	74	MACH_CHECK_ERROR (ret);
	75	}
	76	amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
	77	fetched++;
	78	}
	79
	80	if (regno == -1 \|\| !amd64_native_gregset_supplies_p (gdbarch, regno))
	81	{
	82	x86_float_state_t fp_regs;
	83	unsigned int fp_count = x86_FLOAT_STATE_COUNT;
	84	kern_return_t ret;
	85
	86	ret = thread_get_state
	87	(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
	88	&fp_count);
	89	if (ret != KERN_SUCCESS)
	90	{
1777feb0	91	printf_unfiltered (_("Error calling thread_get_state for "
17092398	92	"float registers for thread 0x%lx\n"),
016b7430	93	(unsigned long) current_thread);
a80b95ba TG	94	MACH_CHECK_ERROR (ret);
a80b95ba TG	95	}
46187dff	96	amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);
a80b95ba TG	97	fetched++;
	98	}
	99	}
	100	else
5cd226f2	101	#endif
a80b95ba TG	102	{
	103	if (regno == -1 \|\| regno < I386_NUM_GREGS)
	104	{
cf9bb588 TG	105	x86_thread_state32_t gp_regs;
cf9bb588 TG	106	unsigned int gp_count = x86_THREAD_STATE32_COUNT;
a80b95ba TG	107	kern_return_t ret;
	108	int i;
	109
	110	ret = thread_get_state
cf9bb588	111	(current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
a80b95ba TG	112	&gp_count);
	113	if (ret != KERN_SUCCESS)
	114	{
1777feb0	115	printf_unfiltered (_("Error calling thread_get_state for "
17092398 TG	116	"GP registers for thread 0x%lx\n"),
17092398 TG	117	(unsigned long) current_thread);
a80b95ba TG	118	MACH_CHECK_ERROR (ret);
	119	}
	120	for (i = 0; i < I386_NUM_GREGS; i++)
	121	regcache_raw_supply
	122	(regcache, i,
	123	(char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
	124
	125	fetched++;
	126	}
	127
	128	if (regno == -1
	129	\|\| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
	130	{
cf9bb588 TG	131	x86_float_state32_t fp_regs;
cf9bb588 TG	132	unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
a80b95ba TG	133	kern_return_t ret;
	134
	135	ret = thread_get_state
cf9bb588	136	(current_thread, x86_FLOAT_STATE32, (thread_state_t) &fp_regs,
a80b95ba TG	137	&fp_count);
	138	if (ret != KERN_SUCCESS)
	139	{
1777feb0	140	printf_unfiltered (_("Error calling thread_get_state for "
17092398 TG	141	"float registers for thread 0x%lx\n"),
17092398 TG	142	(unsigned long) current_thread);
a80b95ba TG	143	MACH_CHECK_ERROR (ret);
	144	}
	145	i387_supply_fxsave (regcache, -1, &fp_regs.__fpu_fcw);
	146	fetched++;
	147	}
	148	}
	149
	150	if (! fetched)
	151	{
	152	warning (_("unknown register %d"), regno);
	153	regcache_raw_supply (regcache, regno, NULL);
	154	}
	155	}
	156
	157	/* Store our register values back into the inferior.
	158	If REGNO is -1, do this for all registers.
	159	Otherwise, REGNO specifies which register (so we can save time). */
	160
	161	static void
28439f5e PA	162	i386_darwin_store_inferior_registers (struct target_ops *ops,
28439f5e PA	163	struct regcache *regcache, int regno)
a80b95ba TG	164	{
	165	thread_t current_thread = ptid_get_tid (inferior_ptid);
	166	struct gdbarch *gdbarch = get_regcache_arch (regcache);
	167
5cd226f2	168	#ifdef BFD64
a80b95ba TG	169	if (gdbarch_ptr_bit (gdbarch) == 64)
	170	{
	171	if (regno == -1 \|\| amd64_native_gregset_supplies_p (gdbarch, regno))
	172	{
	173	x86_thread_state_t gp_regs;
	174	kern_return_t ret;
	175	unsigned int gp_count = x86_THREAD_STATE_COUNT;
	176
	177	ret = thread_get_state
	178	(current_thread, x86_THREAD_STATE, (thread_state_t) &gp_regs,
	179	&gp_count);
	180	MACH_CHECK_ERROR (ret);
	181	gdb_assert (gp_regs.tsh.flavor == x86_THREAD_STATE64);
	182	gdb_assert (gp_regs.tsh.count == x86_THREAD_STATE64_COUNT);
	183
	184	amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);
	185
	186	ret = thread_set_state (current_thread, x86_THREAD_STATE,
	187	(thread_state_t) &gp_regs,
	188	x86_THREAD_STATE_COUNT);
	189	MACH_CHECK_ERROR (ret);
	190	}
	191
	192	if (regno == -1 \|\| !amd64_native_gregset_supplies_p (gdbarch, regno))
	193	{
	194	x86_float_state_t fp_regs;
	195	kern_return_t ret;
	196	unsigned int fp_count = x86_FLOAT_STATE_COUNT;
	197
	198	ret = thread_get_state
	199	(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
	200	&fp_count);
	201	MACH_CHECK_ERROR (ret);
	202	gdb_assert (fp_regs.fsh.flavor == x86_FLOAT_STATE64);
	203	gdb_assert (fp_regs.fsh.count == x86_FLOAT_STATE64_COUNT);
	204
46187dff	205	amd64_collect_fxsave (regcache, regno, &fp_regs.ufs.fs64.__fpu_fcw);
a80b95ba TG	206
	207	ret = thread_set_state (current_thread, x86_FLOAT_STATE,
	208	(thread_state_t) & fp_regs,
	209	x86_FLOAT_STATE_COUNT);
	210	MACH_CHECK_ERROR (ret);
	211	}
	212	}
	213	else
5cd226f2	214	#endif
a80b95ba TG	215	{
	216	if (regno == -1 \|\| regno < I386_NUM_GREGS)
	217	{
cf9bb588	218	x86_thread_state32_t gp_regs;
a80b95ba	219	kern_return_t ret;
cf9bb588	220	unsigned int gp_count = x86_THREAD_STATE32_COUNT;
a80b95ba TG	221	int i;
	222
	223	ret = thread_get_state
cf9bb588	224	(current_thread, x86_THREAD_STATE32, (thread_state_t) &gp_regs,
a80b95ba TG	225	&gp_count);
	226	MACH_CHECK_ERROR (ret);
	227
	228	for (i = 0; i < I386_NUM_GREGS; i++)
	229	if (regno == -1 \|\| regno == i)
	230	regcache_raw_collect
	231	(regcache, i,
	232	(char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
	233
cf9bb588 TG	234	ret = thread_set_state (current_thread, x86_THREAD_STATE32,
	235	(thread_state_t) &gp_regs,
	236	x86_THREAD_STATE32_COUNT);
a80b95ba TG	237	MACH_CHECK_ERROR (ret);
	238	}
	239
	240	if (regno == -1
	241	\|\| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
	242	{
cf9bb588 TG	243	x86_float_state32_t fp_regs;
cf9bb588 TG	244	unsigned int fp_count = x86_FLOAT_STATE32_COUNT;
a80b95ba TG	245	kern_return_t ret;
	246
	247	ret = thread_get_state
cf9bb588	248	(current_thread, x86_FLOAT_STATE32, (thread_state_t) & fp_regs,
a80b95ba TG	249	&fp_count);
	250	MACH_CHECK_ERROR (ret);
	251
	252	i387_collect_fxsave (regcache, regno, &fp_regs.__fpu_fcw);
	253
cf9bb588 TG	254	ret = thread_set_state (current_thread, x86_FLOAT_STATE32,
	255	(thread_state_t) &fp_regs,
	256	x86_FLOAT_STATE32_COUNT);
a80b95ba TG	257	MACH_CHECK_ERROR (ret);
	258	}
	259	}
	260	}
	261
a80b95ba TG	262	/* Support for debug registers, boosted mostly from i386-linux-nat.c. */
a80b95ba TG	263
a80b95ba	264	static void
b1328b1b	265	i386_darwin_dr_set (int regnum, CORE_ADDR value)
a80b95ba TG	266	{
	267	int current_pid;
	268	thread_t current_thread;
	269	x86_debug_state_t dr_regs;
	270	kern_return_t ret;
61d82a0d	271	unsigned int dr_count;
a80b95ba TG	272
	273	gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
	274
	275	current_thread = ptid_get_tid (inferior_ptid);
	276
61d82a0d TG	277	dr_regs.dsh.flavor = x86_DEBUG_STATE;
61d82a0d TG	278	dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
a80b95ba	279	dr_count = x86_DEBUG_STATE_COUNT;
61d82a0d	280	ret = thread_get_state (current_thread, x86_DEBUG_STATE,
a80b95ba	281	(thread_state_t) &dr_regs, &dr_count);
b1328b1b	282	MACH_CHECK_ERROR (ret);
a80b95ba	283
61d82a0d	284	switch (dr_regs.dsh.flavor)
a80b95ba	285	{
61d82a0d TG	286	case x86_DEBUG_STATE32:
	287	switch (regnum)
	288	{
	289	case 0:
	290	dr_regs.uds.ds32.__dr0 = value;
	291	break;
	292	case 1:
	293	dr_regs.uds.ds32.__dr1 = value;
	294	break;
	295	case 2:
	296	dr_regs.uds.ds32.__dr2 = value;
	297	break;
	298	case 3:
	299	dr_regs.uds.ds32.__dr3 = value;
	300	break;
	301	case 4:
	302	dr_regs.uds.ds32.__dr4 = value;
	303	break;
	304	case 5:
	305	dr_regs.uds.ds32.__dr5 = value;
	306	break;
	307	case 6:
	308	dr_regs.uds.ds32.__dr6 = value;
	309	break;
	310	case 7:
	311	dr_regs.uds.ds32.__dr7 = value;
	312	break;
	313	}
	314	break;
	315	#ifdef BFD64
	316	case x86_DEBUG_STATE64:
	317	switch (regnum)
	318	{
	319	case 0:
	320	dr_regs.uds.ds64.__dr0 = value;
	321	break;
	322	case 1:
	323	dr_regs.uds.ds64.__dr1 = value;
	324	break;
	325	case 2:
	326	dr_regs.uds.ds64.__dr2 = value;
	327	break;
	328	case 3:
	329	dr_regs.uds.ds64.__dr3 = value;
	330	break;
	331	case 4:
	332	dr_regs.uds.ds64.__dr4 = value;
	333	break;
	334	case 5:
	335	dr_regs.uds.ds64.__dr5 = value;
	336	break;
	337	case 6:
	338	dr_regs.uds.ds64.__dr6 = value;
	339	break;
	340	case 7:
	341	dr_regs.uds.ds64.__dr7 = value;
	342	break;
	343	}
	344	break;
	345	#endif
a80b95ba TG	346	}
a80b95ba TG	347
b1328b1b TG	348	ret = thread_set_state (current_thread, dr_regs.dsh.flavor,
b1328b1b TG	349	(thread_state_t) &dr_regs.uds, dr_count);
a80b95ba	350
b1328b1b	351	MACH_CHECK_ERROR (ret);
a80b95ba TG	352	}
a80b95ba TG	353
b1328b1b	354	static CORE_ADDR
a80b95ba TG	355	i386_darwin_dr_get (int regnum)
	356	{
	357	thread_t current_thread;
	358	x86_debug_state_t dr_regs;
	359	kern_return_t ret;
61d82a0d	360	unsigned int dr_count;
a80b95ba TG	361
	362	gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
	363
	364	current_thread = ptid_get_tid (inferior_ptid);
	365
61d82a0d TG	366	dr_regs.dsh.flavor = x86_DEBUG_STATE;
61d82a0d TG	367	dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
a80b95ba	368	dr_count = x86_DEBUG_STATE_COUNT;
61d82a0d	369	ret = thread_get_state (current_thread, x86_DEBUG_STATE,
a80b95ba	370	(thread_state_t) &dr_regs, &dr_count);
b1328b1b	371	MACH_CHECK_ERROR (ret);
a80b95ba	372
61d82a0d	373	switch (dr_regs.dsh.flavor)
a80b95ba	374	{
61d82a0d TG	375	case x86_DEBUG_STATE32:
	376	switch (regnum)
	377	{
	378	case 0:
	379	return dr_regs.uds.ds32.__dr0;
	380	case 1:
	381	return dr_regs.uds.ds32.__dr1;
	382	case 2:
	383	return dr_regs.uds.ds32.__dr2;
	384	case 3:
	385	return dr_regs.uds.ds32.__dr3;
	386	case 4:
	387	return dr_regs.uds.ds32.__dr4;
	388	case 5:
	389	return dr_regs.uds.ds32.__dr5;
	390	case 6:
	391	return dr_regs.uds.ds32.__dr6;
	392	case 7:
	393	return dr_regs.uds.ds32.__dr7;
	394	default:
	395	return -1;
	396	}
	397	break;
	398	#ifdef BFD64
	399	case x86_DEBUG_STATE64:
	400	switch (regnum)
	401	{
	402	case 0:
	403	return dr_regs.uds.ds64.__dr0;
	404	case 1:
	405	return dr_regs.uds.ds64.__dr1;
	406	case 2:
	407	return dr_regs.uds.ds64.__dr2;
	408	case 3:
	409	return dr_regs.uds.ds64.__dr3;
	410	case 4:
	411	return dr_regs.uds.ds64.__dr4;
	412	case 5:
	413	return dr_regs.uds.ds64.__dr5;
	414	case 6:
	415	return dr_regs.uds.ds64.__dr6;
	416	case 7:
	417	return dr_regs.uds.ds64.__dr7;
	418	default:
	419	return -1;
	420	}
	421	break;
	422	#endif
	423	default:
	424	return -1;
a80b95ba TG	425	}
	426	}
	427
61d82a0d	428	static void
a80b95ba TG	429	i386_darwin_dr_set_control (unsigned long control)
	430	{
	431	i386_darwin_dr_set (DR_CONTROL, control);
	432	}
	433
61d82a0d	434	static void
a80b95ba TG	435	i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
	436	{
	437	gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
	438
	439	i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
	440	}
	441
61d82a0d	442	static CORE_ADDR
7b50312a	443	i386_darwin_dr_get_addr (int regnum)
a80b95ba	444	{
7b50312a	445	return i386_darwin_dr_get (regnum);
a80b95ba TG	446	}
a80b95ba TG	447
61d82a0d	448	static unsigned long
a80b95ba TG	449	i386_darwin_dr_get_status (void)
	450	{
	451	return i386_darwin_dr_get (DR_STATUS);
	452	}
	453
61d82a0d	454	static unsigned long
7b50312a PA	455	i386_darwin_dr_get_control (void)
	456	{
	457	return i386_darwin_dr_get (DR_CONTROL);
	458	}
	459
a80b95ba TG	460	void
	461	darwin_check_osabi (darwin_inferior *inf, thread_t thread)
	462	{
f5656ead	463	if (gdbarch_osabi (target_gdbarch ()) == GDB_OSABI_UNKNOWN)
a80b95ba TG	464	{
	465	/* Attaching to a process. Let's figure out what kind it is. */
	466	x86_thread_state_t gp_regs;
	467	struct gdbarch_info info;
	468	unsigned int gp_count = x86_THREAD_STATE_COUNT;
	469	kern_return_t ret;
	470
	471	ret = thread_get_state (thread, x86_THREAD_STATE,
	472	(thread_state_t) &gp_regs, &gp_count);
	473	if (ret != KERN_SUCCESS)
	474	{
	475	MACH_CHECK_ERROR (ret);
	476	return;
	477	}
	478
	479	gdbarch_info_init (&info);
	480	gdbarch_info_fill (&info);
f5656ead	481	info.byte_order = gdbarch_byte_order (target_gdbarch ());
a80b95ba TG	482	info.osabi = GDB_OSABI_DARWIN;
	483	if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
	484	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
	485	bfd_mach_x86_64);
	486	else
61d82a0d	487	info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
a80b95ba TG	488	bfd_mach_i386_i386);
	489	gdbarch_update_p (info);
	490	}
	491	}
	492
	493	#define X86_EFLAGS_T 0x100UL
	494
acdb24a9 TG	495	/* Returning from a signal trampoline is done by calling a
	496	special system call (sigreturn). This system call
	497	restores the registers that were saved when the signal was
	498	raised, including %eflags/%rflags. That means that single-stepping
	499	won't work. Instead, we'll have to modify the signal context
	500	that's about to be restored, and set the trace flag there. */
	501
	502	static int
	503	i386_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
	504	{
f5656ead	505	enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
acdb24a9 TG	506	static const gdb_byte darwin_syscall[] = { 0xcd, 0x80 }; /* int 0x80 */
	507	gdb_byte buf[sizeof (darwin_syscall)];
	508
	509	/* Check if PC is at a sigreturn system call. */
	510	if (target_read_memory (regs->uts.ts32.__eip, buf, sizeof (buf)) == 0
	511	&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
	512	&& regs->uts.ts32.__eax == 0xb8 /* SYS_sigreturn */)
	513	{
	514	ULONGEST uctx_addr;
	515	ULONGEST mctx_addr;
	516	ULONGEST flags_addr;
	517	unsigned int eflags;
	518
e17a4113 UW	519	uctx_addr = read_memory_unsigned_integer
	520	(regs->uts.ts32.__esp + 4, 4, byte_order);
	521	mctx_addr = read_memory_unsigned_integer
	522	(uctx_addr + 28, 4, byte_order);
acdb24a9 TG	523
	524	flags_addr = mctx_addr + 12 + 9 * 4;
	525	read_memory (flags_addr, (gdb_byte *) &eflags, 4);
	526	eflags \|= X86_EFLAGS_T;
	527	write_memory (flags_addr, (gdb_byte *) &eflags, 4);
	528
	529	return 1;
	530	}
	531	return 0;
	532	}
	533
5cd226f2	534	#ifdef BFD64
acdb24a9 TG	535	static int
	536	amd64_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
	537	{
f5656ead	538	enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
acdb24a9 TG	539	static const gdb_byte darwin_syscall[] = { 0x0f, 0x05 }; /* syscall */
	540	gdb_byte buf[sizeof (darwin_syscall)];
	541
	542	/* Check if PC is at a sigreturn system call. */
	543	if (target_read_memory (regs->uts.ts64.__rip, buf, sizeof (buf)) == 0
	544	&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
	545	&& (regs->uts.ts64.__rax & 0xffffffff) == 0x20000b8 /* SYS_sigreturn */)
	546	{
	547	ULONGEST mctx_addr;
	548	ULONGEST flags_addr;
	549	unsigned int rflags;
	550
e17a4113 UW	551	mctx_addr = read_memory_unsigned_integer
e17a4113 UW	552	(regs->uts.ts64.__rdi + 48, 8, byte_order);
acdb24a9 TG	553	flags_addr = mctx_addr + 16 + 17 * 8;
	554
	555	/* AMD64 is little endian. */
	556	read_memory (flags_addr, (gdb_byte *) &rflags, 4);
	557	rflags \|= X86_EFLAGS_T;
	558	write_memory (flags_addr, (gdb_byte *) &rflags, 4);
	559
	560	return 1;
	561	}
	562	return 0;
	563	}
5cd226f2	564	#endif
acdb24a9	565
a80b95ba TG	566	void
	567	darwin_set_sstep (thread_t thread, int enable)
	568	{
	569	x86_thread_state_t regs;
	570	unsigned int count = x86_THREAD_STATE_COUNT;
	571	kern_return_t kret;
	572
	573	kret = thread_get_state (thread, x86_THREAD_STATE,
	574	(thread_state_t) &regs, &count);
	575	if (kret != KERN_SUCCESS)
	576	{
	577	printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
	578	kret, thread);
	579	return;
	580	}
acdb24a9	581
a80b95ba TG	582	switch (regs.tsh.flavor)
	583	{
	584	case x86_THREAD_STATE32:
	585	{
	586	__uint32_t bit = enable ? X86_EFLAGS_T : 0;
b1328b1b	587
acdb24a9 TG	588	if (enable && i386_darwin_sstep_at_sigreturn (&regs))
acdb24a9 TG	589	return;
a80b95ba TG	590	if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
a80b95ba TG	591	return;
1777feb0 MS	592	regs.uts.ts32.__eflags
1777feb0 MS	593	= (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) \| bit;
b1328b1b	594	kret = thread_set_state (thread, x86_THREAD_STATE,
a80b95ba TG	595	(thread_state_t) &regs, count);
	596	MACH_CHECK_ERROR (kret);
	597	}
	598	break;
5cd226f2	599	#ifdef BFD64
a80b95ba TG	600	case x86_THREAD_STATE64:
	601	{
	602	__uint64_t bit = enable ? X86_EFLAGS_T : 0;
	603
acdb24a9 TG	604	if (enable && amd64_darwin_sstep_at_sigreturn (&regs))
acdb24a9 TG	605	return;
a80b95ba TG	606	if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
a80b95ba TG	607	return;
1777feb0 MS	608	regs.uts.ts64.__rflags
1777feb0 MS	609	= (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) \| bit;
b1328b1b	610	kret = thread_set_state (thread, x86_THREAD_STATE,
a80b95ba TG	611	(thread_state_t) &regs, count);
	612	MACH_CHECK_ERROR (kret);
	613	}
	614	break;
5cd226f2	615	#endif
a80b95ba	616	default:
b37520b6	617	error (_("darwin_set_sstep: unknown flavour: %d"), regs.tsh.flavor);
a80b95ba TG	618	}
	619	}
	620
	621	void
	622	darwin_complete_target (struct target_ops *target)
	623	{
5cd226f2	624	#ifdef BFD64
a80b95ba TG	625	amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
	626	amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
	627	amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
	628	amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;
5cd226f2	629	#endif
a80b95ba	630
df7e5265	631	x86_use_watchpoints (target);
61d82a0d	632
df7e5265 GB	633	x86_dr_low.set_control = i386_darwin_dr_set_control;
	634	x86_dr_low.set_addr = i386_darwin_dr_set_addr;
	635	x86_dr_low.get_addr = i386_darwin_dr_get_addr;
	636	x86_dr_low.get_status = i386_darwin_dr_get_status;
	637	x86_dr_low.get_control = i386_darwin_dr_get_control;
61d82a0d TG	638
	639	/* Let's assume that the kernel is 64 bits iff the executable is. */
	640	#ifdef __x86_64__
df7e5265	641	x86_set_debug_register_length (8);
61d82a0d	642	#else
df7e5265	643	x86_set_debug_register_length (4);
61d82a0d TG	644	#endif
61d82a0d TG	645
a80b95ba TG	646	target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
	647	target->to_store_registers = i386_darwin_store_inferior_registers;
	648	}