[deliverable/binutils-gdb.git] / gdb / i386m3-nat.c

/* Low level interface to I386 running mach 3.0.
   Copyright (C) 1992 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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "inferior.h"
#include "floatformat.h"

#include <stdio.h>

#include <mach.h>
#include <mach/message.h>
#include <mach/exception.h>
#include <mach_error.h>

/* Hmmm... Should this not be here?
 * Now for i386_float_info() target_has_execution
 */
#include <target.h>

/* This mess is duplicated in bfd/i386mach3.h

 * This is an ugly way to hack around the incorrect
 * definition of UPAGES in i386/machparam.h.
 *
 * The definition should specify the size reserved
 * for "struct user" in core files in PAGES,
 * but instead it gives it in 512-byte core-clicks
 * for i386 and i860.
 */
#include <sys/param.h>
#if UPAGES == 16
#define UAREA_SIZE ctob(UPAGES)
#elif UPAGES == 2
#define UAREA_SIZE (NBPG*UPAGES)
#else
FIXME ! !UPAGES is neither 2 nor 16
#endif

/* @@@ Should move print_387_status() to i387-tdep.c */
extern void print_387_control_word ();		/* i387-tdep.h */
extern void print_387_status_word ();

#define private static
\f

/* Find offsets to thread states at compile time.
 * If your compiler does not grok this, calculate offsets
 * offsets yourself and use them (or get a compatible compiler :-)
 */

#define  REG_OFFSET(reg) (int)(&((struct i386_thread_state *)0)->reg)

/* at reg_offset[i] is the offset to the i386_thread_state
 * location where the gdb registers[i] is stored.
 */

static int reg_offset[] =
{
  REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
  REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi),
  REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss),
  REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
};

#define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])

/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
 * Caller knows that the regs handled in one transaction are of same size.
 */
#define FETCH_REGS(state, regnum, count) \
  memcpy (&registers[REGISTER_BYTE (regnum)], \
	  REG_ADDRESS (state, regnum), \
	  count*REGISTER_SIZE)

/* Store COUNT contiguous registers to thread STATE starting from REGNUM */
#define STORE_REGS(state, regnum, count) \
  memcpy (REG_ADDRESS (state, regnum), \
	  &registers[REGISTER_BYTE (regnum)], \
	  count*REGISTER_SIZE)
\f
/*
 * Fetch inferiors registers for gdb.
 * REGNO specifies which (as gdb views it) register, -1 for all.
 */

void
fetch_inferior_registers (regno)
     int regno;
{
  kern_return_t ret;
  thread_state_data_t state;
  unsigned int stateCnt = i386_THREAD_STATE_COUNT;
  int index;

  if (!MACH_PORT_VALID (current_thread))
    error ("fetch inferior registers: Invalid thread");

  if (must_suspend_thread)
    setup_thread (current_thread, 1);

  ret = thread_get_state (current_thread,
			  i386_THREAD_STATE,
			  state,
			  &stateCnt);

  if (ret != KERN_SUCCESS)
    warning ("fetch_inferior_registers: %s ",
	     mach_error_string (ret));
#if 0
  /* It may be more effective to store validate all of them,
   * since we fetched them all anyway
   */
  else if (regno != -1)
    supply_register (regno, (char *) state + reg_offset[regno]);
#endif
  else
    {
      for (index = 0; index < NUM_REGS; index++)
	supply_register (index, (char *) state + reg_offset[index]);
    }

  if (must_suspend_thread)
    setup_thread (current_thread, 0);
}
\f
/* Store our register values back into the inferior.
 * If REGNO is -1, do this for all registers.
 * Otherwise, REGNO specifies which register
 *
 * On mach3 all registers are always saved in one call.
 */
void
store_inferior_registers (regno)
     int regno;
{
  kern_return_t ret;
  thread_state_data_t state;
  unsigned int stateCnt = i386_THREAD_STATE_COUNT;
  register int index;

  if (!MACH_PORT_VALID (current_thread))
    error ("store inferior registers: Invalid thread");

  if (must_suspend_thread)
    setup_thread (current_thread, 1);

  /* Fetch the state of the current thread */
  ret = thread_get_state (current_thread,
			  i386_THREAD_STATE,
			  state,
			  &stateCnt);

  if (ret != KERN_SUCCESS)
    {
      warning ("store_inferior_registers (get): %s",
	       mach_error_string (ret));
      if (must_suspend_thread)
	setup_thread (current_thread, 0);
      return;
    }

  /* move gdb's registers to thread's state

   * Since we save all registers anyway, save the ones
   * that gdb thinks are valid (e.g. ignore the regno
   * parameter)
   */
#if 0
  if (regno != -1)
    STORE_REGS (state, regno, 1);
  else
#endif
    {
      for (index = 0; index < NUM_REGS; index++)
	STORE_REGS (state, index, 1);
    }

  /* Write gdb's current view of register to the thread
   */
  ret = thread_set_state (current_thread,
			  i386_THREAD_STATE,
			  state,
			  i386_THREAD_STATE_COUNT);

  if (ret != KERN_SUCCESS)
    warning ("store_inferior_registers (set): %s",
	     mach_error_string (ret));

  if (must_suspend_thread)
    setup_thread (current_thread, 0);
}
\f


/* Return the address in the core dump or inferior of register REGNO.
 * BLOCKEND should be the address of the end of the UPAGES area read
 * in memory, but it's not?
 *
 * Currently our UX server dumps the whole thread state to the
 * core file. If your UX does something else, adapt the routine
 * below to return the offset to the given register.
 * 
 * Called by core-aout.c(fetch_core_registers)
 */

CORE_ADDR
register_addr (regno, blockend)
     int regno;
     CORE_ADDR blockend;
{
  CORE_ADDR addr;

  if (regno < 0 || regno >= NUM_REGS)
    error ("Invalid register number %d.", regno);

  /* UAREA_SIZE == 8 kB in i386 */
  addr = (unsigned int) REG_ADDRESS (UAREA_SIZE - sizeof (struct i386_thread_state), regno);

  return addr;
}

/* jtv@hut.fi: I copied and modified this 387 code from
 * gdb/i386-xdep.c. Modifications for Mach 3.0.
 *
 * i387 status dumper. See also i387-tdep.c
 */
struct env387
{
  unsigned short control;
  unsigned short r0;
  unsigned short status;
  unsigned short r1;
  unsigned short tag;
  unsigned short r2;
  unsigned long eip;
  unsigned short code_seg;
  unsigned short opcode;
  unsigned long operand;
  unsigned short operand_seg;
  unsigned short r3;
  unsigned char regs[8][10];
};
/* This routine is machine independent?
 * Should move it to i387-tdep.c but you need to export struct env387
 */
private
print_387_status (status, ep)
     unsigned short status;
     struct env387 *ep;
{
  int i;
  int bothstatus;
  int top;
  int fpreg;
  unsigned char *p;

  bothstatus = ((status != 0) && (ep->status != 0));
  if (status != 0)
    {
      if (bothstatus)
	printf_unfiltered ("u: ");
      print_387_status_word (status);
    }

  if (ep->status != 0)
    {
      if (bothstatus)
	printf_unfiltered ("e: ");
      print_387_status_word (ep->status);
    }

  print_387_control_word (ep->control);
  printf_unfiltered ("last exception: ");
  printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
  printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
  printf_unfiltered ("%s; ", local_hex_string (ep->eip));
  printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
  printf_unfiltered (":%s\n", local_hex_string (ep->operand));

  top = (ep->status >> 11) & 7;

  printf_unfiltered ("regno  tag  msb              lsb  value\n");
  for (fpreg = 7; fpreg >= 0; fpreg--)
    {
      double val;

      printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : "  ", fpreg);

      switch ((ep->tag >> (fpreg * 2)) & 3)
	{
	case 0:
	  printf_unfiltered ("valid ");
	  break;
	case 1:
	  printf_unfiltered ("zero  ");
	  break;
	case 2:
	  printf_unfiltered ("trap  ");
	  break;
	case 3:
	  printf_unfiltered ("empty ");
	  break;
	}
      for (i = 9; i >= 0; i--)
	printf_unfiltered ("%02x", ep->regs[fpreg][i]);

      floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
			     &val);
      printf_unfiltered ("  %g\n", val);
    }
  if (ep->r0)
    printf_unfiltered ("warning: reserved0 is %s\n", local_hex_string (ep->r0));
  if (ep->r1)
    printf_unfiltered ("warning: reserved1 is %s\n", local_hex_string (ep->r1));
  if (ep->r2)
    printf_unfiltered ("warning: reserved2 is %s\n", local_hex_string (ep->r2));
  if (ep->r3)
    printf_unfiltered ("warning: reserved3 is %s\n", local_hex_string (ep->r3));
}

/*
 * values that go into fp_kind (from <i386/fpreg.h>)
 */
#define FP_NO   0		/* no fp chip, no emulator (no fp support)      */
#define FP_SW   1		/* no fp chip, using software emulator          */
#define FP_HW   2		/* chip present bit                             */
#define FP_287  2		/* 80287 chip present                           */
#define FP_387  3		/* 80387 chip present                           */

typedef struct fpstate
{
#if 1
  unsigned char state[FP_STATE_BYTES];	/* "hardware" state */
#else
  struct env387 state;		/* Actually this */
#endif
  int status;			/* Duplicate status */
}
 *fpstate_t;

/* Mach 3 specific routines.
 */
private boolean_t
get_i387_state (fstate)
     struct fpstate *fstate;
{
  kern_return_t ret;
  thread_state_data_t state;
  unsigned int fsCnt = i386_FLOAT_STATE_COUNT;
  struct i386_float_state *fsp;

  ret = thread_get_state (current_thread,
			  i386_FLOAT_STATE,
			  state,
			  &fsCnt);

  if (ret != KERN_SUCCESS)
    {
      warning ("Can not get live floating point state: %s",
	       mach_error_string (ret));
      return FALSE;
    }

  fsp = (struct i386_float_state *) state;
  /* The 387 chip (also 486 counts) or a software emulator? */
  if (!fsp->initialized || (fsp->fpkind != FP_387 && fsp->fpkind != FP_SW))
    return FALSE;

  /* Clear the target then copy thread's float state there.
     Make a copy of the status word, for some reason?
   */
  memset (fstate, 0, sizeof (struct fpstate));

  fstate->status = fsp->exc_status;

  memcpy (fstate->state, (char *) &fsp->hw_state, FP_STATE_BYTES);

  return TRUE;
}

private boolean_t
get_i387_core_state (fstate)
     struct fpstate *fstate;
{
  /* Not implemented yet. Core files do not contain float state. */
  return FALSE;
}

/*
 * This is called by "info float" command
 */
void
i386_mach3_float_info ()
{
  char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
  boolean_t valid = FALSE;
  fpstate_t fps;

  if (target_has_execution)
    valid = get_i387_state (buf);
#if 0
  else if (WE HAVE CORE FILE)	/* @@@@ Core files not supported */
    valid = get_i387_core_state (buf);
#endif

  if (!valid)
    {
      warning ("no floating point status saved");
      return;
    }

  fps = (fpstate_t) buf;

  print_387_status (fps->status, (struct env387 *) fps->state);
}
Commit	Line	Data
c906108c SS	1	/* Low level interface to I386 running mach 3.0.
	2	Copyright (C) 1992 Free Software Foundation, Inc.
	3
c5aa993b	4	This file is part of GDB.
c906108c	5
c5aa993b JM	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
c906108c	10
c5aa993b JM	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
c906108c	15
c5aa993b JM	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
c906108c SS	20
	21	#include "defs.h"
	22	#include "inferior.h"
	23	#include "floatformat.h"
	24
	25	#include <stdio.h>
	26
	27	#include <mach.h>
	28	#include <mach/message.h>
	29	#include <mach/exception.h>
	30	#include <mach_error.h>
	31
	32	/* Hmmm... Should this not be here?
	33	* Now for i386_float_info() target_has_execution
	34	*/
	35	#include <target.h>
	36
	37	/* This mess is duplicated in bfd/i386mach3.h
c5aa993b	38
c906108c SS	39	* This is an ugly way to hack around the incorrect
	40	* definition of UPAGES in i386/machparam.h.
	41	*
	42	* The definition should specify the size reserved
	43	* for "struct user" in core files in PAGES,
	44	* but instead it gives it in 512-byte core-clicks
	45	* for i386 and i860.
	46	*/
	47	#include <sys/param.h>
	48	#if UPAGES == 16
	49	#define UAREA_SIZE ctob(UPAGES)
	50	#elif UPAGES == 2
	51	#define UAREA_SIZE (NBPG*UPAGES)
	52	#else
c5aa993b	53	FIXME ! !UPAGES is neither 2 nor 16
c906108c SS	54	#endif
	55
	56	/* @@@ Should move print_387_status() to i387-tdep.c */
	57	extern void print_387_control_word (); /* i387-tdep.h */
	58	extern void print_387_status_word ();
	59
	60	#define private static
c906108c	61	\f
c5aa993b	62
c906108c SS	63	/* Find offsets to thread states at compile time.
	64	* If your compiler does not grok this, calculate offsets
	65	* offsets yourself and use them (or get a compatible compiler :-)
	66	*/
	67
	68	#define REG_OFFSET(reg) (int)(&((struct i386_thread_state *)0)->reg)
	69
	70	/* at reg_offset[i] is the offset to the i386_thread_state
	71	* location where the gdb registers[i] is stored.
	72	*/
	73
c5aa993b	74	static int reg_offset[] =
c906108c	75	{
c5aa993b JM	76	REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
	77	REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi),
	78	REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss),
	79	REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
c906108c SS	80	};
	81
	82	#define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
	83
	84	/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
	85	* Caller knows that the regs handled in one transaction are of same size.
	86	*/
	87	#define FETCH_REGS(state, regnum, count) \
	88	memcpy (&registers[REGISTER_BYTE (regnum)], \
	89	REG_ADDRESS (state, regnum), \
	90	count*REGISTER_SIZE)
	91
	92	/* Store COUNT contiguous registers to thread STATE starting from REGNUM */
	93	#define STORE_REGS(state, regnum, count) \
	94	memcpy (REG_ADDRESS (state, regnum), \
	95	&registers[REGISTER_BYTE (regnum)], \
	96	count*REGISTER_SIZE)
	97	\f
	98	/*
	99	* Fetch inferiors registers for gdb.
	100	* REGNO specifies which (as gdb views it) register, -1 for all.
	101	*/
	102
	103	void
	104	fetch_inferior_registers (regno)
	105	int regno;
	106	{
	107	kern_return_t ret;
	108	thread_state_data_t state;
	109	unsigned int stateCnt = i386_THREAD_STATE_COUNT;
	110	int index;
c5aa993b JM	111
c5aa993b JM	112	if (!MACH_PORT_VALID (current_thread))
c906108c SS	113	error ("fetch inferior registers: Invalid thread");
	114
	115	if (must_suspend_thread)
	116	setup_thread (current_thread, 1);
	117
	118	ret = thread_get_state (current_thread,
	119	i386_THREAD_STATE,
	120	state,
	121	&stateCnt);
	122
	123	if (ret != KERN_SUCCESS)
	124	warning ("fetch_inferior_registers: %s ",
	125	mach_error_string (ret));
	126	#if 0
	127	/* It may be more effective to store validate all of them,
	128	* since we fetched them all anyway
	129	*/
	130	else if (regno != -1)
c5aa993b	131	supply_register (regno, (char *) state + reg_offset[regno]);
c906108c SS	132	#endif
	133	else
	134	{
c5aa993b JM	135	for (index = 0; index < NUM_REGS; index++)
c5aa993b JM	136	supply_register (index, (char *) state + reg_offset[index]);
c906108c SS	137	}
	138
	139	if (must_suspend_thread)
	140	setup_thread (current_thread, 0);
	141	}
	142	\f
	143	/* Store our register values back into the inferior.
	144	* If REGNO is -1, do this for all registers.
	145	* Otherwise, REGNO specifies which register
	146	*
	147	* On mach3 all registers are always saved in one call.
	148	*/
	149	void
	150	store_inferior_registers (regno)
	151	int regno;
	152	{
	153	kern_return_t ret;
	154	thread_state_data_t state;
	155	unsigned int stateCnt = i386_THREAD_STATE_COUNT;
	156	register int index;
	157
c5aa993b	158	if (!MACH_PORT_VALID (current_thread))
c906108c SS	159	error ("store inferior registers: Invalid thread");
	160
	161	if (must_suspend_thread)
	162	setup_thread (current_thread, 1);
	163
	164	/* Fetch the state of the current thread */
	165	ret = thread_get_state (current_thread,
	166	i386_THREAD_STATE,
	167	state,
	168	&stateCnt);
	169
c5aa993b	170	if (ret != KERN_SUCCESS)
c906108c SS	171	{
	172	warning ("store_inferior_registers (get): %s",
	173	mach_error_string (ret));
	174	if (must_suspend_thread)
	175	setup_thread (current_thread, 0);
	176	return;
	177	}
	178
	179	/* move gdb's registers to thread's state
c5aa993b	180
c906108c SS	181	* Since we save all registers anyway, save the ones
	182	* that gdb thinks are valid (e.g. ignore the regno
	183	* parameter)
	184	*/
	185	#if 0
	186	if (regno != -1)
	187	STORE_REGS (state, regno, 1);
	188	else
	189	#endif
	190	{
c5aa993b	191	for (index = 0; index < NUM_REGS; index++)
c906108c SS	192	STORE_REGS (state, index, 1);
c906108c SS	193	}
c5aa993b	194
c906108c SS	195	/* Write gdb's current view of register to the thread
	196	*/
	197	ret = thread_set_state (current_thread,
	198	i386_THREAD_STATE,
	199	state,
	200	i386_THREAD_STATE_COUNT);
c5aa993b	201
c906108c SS	202	if (ret != KERN_SUCCESS)
	203	warning ("store_inferior_registers (set): %s",
	204	mach_error_string (ret));
	205
	206	if (must_suspend_thread)
	207	setup_thread (current_thread, 0);
	208	}
c906108c SS	209	\f
c906108c SS	210
c5aa993b	211
c906108c SS	212	/* Return the address in the core dump or inferior of register REGNO.
	213	* BLOCKEND should be the address of the end of the UPAGES area read
	214	* in memory, but it's not?
	215	*
	216	* Currently our UX server dumps the whole thread state to the
	217	* core file. If your UX does something else, adapt the routine
	218	* below to return the offset to the given register.
	219	*
	220	* Called by core-aout.c(fetch_core_registers)
	221	*/
	222
	223	CORE_ADDR
	224	register_addr (regno, blockend)
	225	int regno;
	226	CORE_ADDR blockend;
	227	{
	228	CORE_ADDR addr;
	229
	230	if (regno < 0 \|\| regno >= NUM_REGS)
	231	error ("Invalid register number %d.", regno);
	232
	233	/* UAREA_SIZE == 8 kB in i386 */
c5aa993b	234	addr = (unsigned int) REG_ADDRESS (UAREA_SIZE - sizeof (struct i386_thread_state), regno);
c906108c SS	235
	236	return addr;
	237	}
	238
	239	/* jtv@hut.fi: I copied and modified this 387 code from
	240	* gdb/i386-xdep.c. Modifications for Mach 3.0.
	241	*
	242	* i387 status dumper. See also i387-tdep.c
	243	*/
c5aa993b	244	struct env387
c906108c SS	245	{
	246	unsigned short control;
	247	unsigned short r0;
	248	unsigned short status;
	249	unsigned short r1;
	250	unsigned short tag;
	251	unsigned short r2;
	252	unsigned long eip;
	253	unsigned short code_seg;
	254	unsigned short opcode;
	255	unsigned long operand;
	256	unsigned short operand_seg;
	257	unsigned short r3;
	258	unsigned char regs[8][10];
	259	};
	260	/* This routine is machine independent?
	261	* Should move it to i387-tdep.c but you need to export struct env387
	262	*/
	263	private
	264	print_387_status (status, ep)
	265	unsigned short status;
	266	struct env387 *ep;
	267	{
	268	int i;
	269	int bothstatus;
	270	int top;
	271	int fpreg;
	272	unsigned char *p;
c5aa993b	273
c906108c	274	bothstatus = ((status != 0) && (ep->status != 0));
c5aa993b	275	if (status != 0)
c906108c SS	276	{
	277	if (bothstatus)
	278	printf_unfiltered ("u: ");
	279	print_387_status_word (status);
	280	}
c5aa993b JM	281
c5aa993b JM	282	if (ep->status != 0)
c906108c SS	283	{
	284	if (bothstatus)
	285	printf_unfiltered ("e: ");
	286	print_387_status_word (ep->status);
	287	}
c5aa993b	288
c906108c SS	289	print_387_control_word (ep->control);
c906108c SS	290	printf_unfiltered ("last exception: ");
c5aa993b JM	291	printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
	292	printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
	293	printf_unfiltered ("%s; ", local_hex_string (ep->eip));
	294	printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
	295	printf_unfiltered (":%s\n", local_hex_string (ep->operand));
	296
c906108c	297	top = (ep->status >> 11) & 7;
c5aa993b	298
c906108c	299	printf_unfiltered ("regno tag msb lsb value\n");
c5aa993b	300	for (fpreg = 7; fpreg >= 0; fpreg--)
c906108c SS	301	{
c906108c SS	302	double val;
c5aa993b	303
c906108c	304	printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
c5aa993b JM	305
c5aa993b JM	306	switch ((ep->tag >> (fpreg * 2)) & 3)
c906108c	307	{
c5aa993b JM	308	case 0:
	309	printf_unfiltered ("valid ");
	310	break;
	311	case 1:
	312	printf_unfiltered ("zero ");
	313	break;
	314	case 2:
	315	printf_unfiltered ("trap ");
	316	break;
	317	case 3:
	318	printf_unfiltered ("empty ");
	319	break;
c906108c SS	320	}
	321	for (i = 9; i >= 0; i--)
	322	printf_unfiltered ("%02x", ep->regs[fpreg][i]);
c5aa993b JM	323
	324	floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
	325	&val);
c906108c SS	326	printf_unfiltered (" %g\n", val);
	327	}
	328	if (ep->r0)
c5aa993b	329	printf_unfiltered ("warning: reserved0 is %s\n", local_hex_string (ep->r0));
c906108c	330	if (ep->r1)
c5aa993b	331	printf_unfiltered ("warning: reserved1 is %s\n", local_hex_string (ep->r1));
c906108c	332	if (ep->r2)
c5aa993b	333	printf_unfiltered ("warning: reserved2 is %s\n", local_hex_string (ep->r2));
c906108c	334	if (ep->r3)
c5aa993b	335	printf_unfiltered ("warning: reserved3 is %s\n", local_hex_string (ep->r3));
c906108c	336	}
c5aa993b	337
c906108c SS	338	/*
	339	* values that go into fp_kind (from <i386/fpreg.h>)
	340	*/
c5aa993b JM	341	#define FP_NO 0 /* no fp chip, no emulator (no fp support) */
	342	#define FP_SW 1 /* no fp chip, using software emulator */
	343	#define FP_HW 2 /* chip present bit */
	344	#define FP_287 2 /* 80287 chip present */
	345	#define FP_387 3 /* 80387 chip present */
c906108c	346
c5aa993b JM	347	typedef struct fpstate
c5aa993b JM	348	{
c906108c	349	#if 1
c5aa993b	350	unsigned char state[FP_STATE_BYTES]; /* "hardware" state */
c906108c	351	#else
c5aa993b	352	struct env387 state; /* Actually this */
c906108c	353	#endif
c5aa993b JM	354	int status; /* Duplicate status */
	355	}
	356	*fpstate_t;
c906108c SS	357
	358	/* Mach 3 specific routines.
	359	*/
	360	private boolean_t
	361	get_i387_state (fstate)
	362	struct fpstate *fstate;
	363	{
	364	kern_return_t ret;
	365	thread_state_data_t state;
	366	unsigned int fsCnt = i386_FLOAT_STATE_COUNT;
	367	struct i386_float_state *fsp;
c5aa993b	368
c906108c SS	369	ret = thread_get_state (current_thread,
	370	i386_FLOAT_STATE,
	371	state,
	372	&fsCnt);
	373
	374	if (ret != KERN_SUCCESS)
	375	{
	376	warning ("Can not get live floating point state: %s",
	377	mach_error_string (ret));
	378	return FALSE;
	379	}
	380
c5aa993b	381	fsp = (struct i386_float_state *) state;
c906108c SS	382	/* The 387 chip (also 486 counts) or a software emulator? */
	383	if (!fsp->initialized \|\| (fsp->fpkind != FP_387 && fsp->fpkind != FP_SW))
	384	return FALSE;
	385
	386	/* Clear the target then copy thread's float state there.
	387	Make a copy of the status word, for some reason?
	388	*/
	389	memset (fstate, 0, sizeof (struct fpstate));
	390
	391	fstate->status = fsp->exc_status;
	392
c5aa993b	393	memcpy (fstate->state, (char *) &fsp->hw_state, FP_STATE_BYTES);
c906108c SS	394
	395	return TRUE;
	396	}
	397
	398	private boolean_t
	399	get_i387_core_state (fstate)
	400	struct fpstate *fstate;
	401	{
	402	/* Not implemented yet. Core files do not contain float state. */
	403	return FALSE;
	404	}
	405
	406	/*
	407	* This is called by "info float" command
	408	*/
	409	void
c5aa993b	410	i386_mach3_float_info ()
c906108c	411	{
c5aa993b	412	char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
c906108c SS	413	boolean_t valid = FALSE;
c906108c SS	414	fpstate_t fps;
c5aa993b	415
c906108c SS	416	if (target_has_execution)
c906108c SS	417	valid = get_i387_state (buf);
c5aa993b JM	418	#if 0
c5aa993b JM	419	else if (WE HAVE CORE FILE) /* @@@@ Core files not supported */
c906108c	420	valid = get_i387_core_state (buf);
c5aa993b	421	#endif
c906108c	422
c5aa993b	423	if (!valid)
c906108c SS	424	{
	425	warning ("no floating point status saved");
	426	return;
	427	}
c5aa993b	428
c906108c SS	429	fps = (fpstate_t) buf;
c906108c SS	430
c5aa993b	431	print_387_status (fps->status, (struct env387 *) fps->state);
c906108c	432	}