[thirdparty/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
c2d751d5 JK	1	/* Low level interface to I386 running mach 3.0.
	2	Copyright (C) 1992 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
	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.
	10
	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.
	15
	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
6c9638b4	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
c2d751d5 JK	19
	20	#include "defs.h"
	21	#include "inferior.h"
c4ad6b09	22	#include "floatformat.h"
c2d751d5 JK	23
	24	#include <stdio.h>
	25
	26	#include <mach.h>
	27	#include <mach/message.h>
	28	#include <mach/exception.h>
	29	#include <mach_error.h>
	30
	31	/* Hmmm... Should this not be here?
	32	* Now for i386_float_info() target_has_execution
	33	*/
	34	#include <target.h>
	35
	36	/* This mess is duplicated in bfd/i386mach3.h
	37	*
	38	* This is an ugly way to hack around the incorrect
	39	* definition of UPAGES in i386/machparam.h.
	40	*
	41	* The definition should specify the size reserved
	42	* for "struct user" in core files in PAGES,
	43	* but instead it gives it in 512-byte core-clicks
	44	* for i386 and i860.
	45	*/
	46	#include <sys/param.h>
	47	#if UPAGES == 16
	48	#define UAREA_SIZE ctob(UPAGES)
	49	#elif UPAGES == 2
	50	#define UAREA_SIZE (NBPG*UPAGES)
	51	#else
	52	FIXME!! UPAGES is neither 2 nor 16
	53	#endif
	54
	55	/* @@@ Should move print_387_status() to i387-tdep.c */
	56	extern void print_387_control_word (); /* i387-tdep.h */
	57	extern void print_387_status_word ();
	58
c2d751d5 JK	59	#define private static
	60
	61	\f
	62	/* Find offsets to thread states at compile time.
	63	* If your compiler does not grok this, calculate offsets
	64	* offsets yourself and use them (or get a compatible compiler :-)
	65	*/
	66
	67	#define REG_OFFSET(reg) (int)(&((struct i386_thread_state *)0)->reg)
	68
	69	/* at reg_offset[i] is the offset to the i386_thread_state
	70	* location where the gdb registers[i] is stored.
	71	*/
	72
	73	static int reg_offset[] =
	74	{
	75	REG_OFFSET(eax), REG_OFFSET(ecx), REG_OFFSET(edx), REG_OFFSET(ebx),
	76	REG_OFFSET(uesp), REG_OFFSET(ebp), REG_OFFSET(esi), REG_OFFSET(edi),
	77	REG_OFFSET(eip), REG_OFFSET(efl), REG_OFFSET(cs), REG_OFFSET(ss),
	78	REG_OFFSET(ds), REG_OFFSET(es), REG_OFFSET(fs), REG_OFFSET(gs)
	79	};
	80
	81	#define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
	82
	83	/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
	84	* Caller knows that the regs handled in one transaction are of same size.
	85	*/
	86	#define FETCH_REGS(state, regnum, count) \
a6e0dae9 JK	87	memcpy (&registers[REGISTER_BYTE (regnum)], \
a6e0dae9 JK	88	REG_ADDRESS (state, regnum), \
f4f0d174	89	count*REGISTER_SIZE)
c2d751d5 JK	90
	91	/* Store COUNT contiguous registers to thread STATE starting from REGNUM */
	92	#define STORE_REGS(state, regnum, count) \
a6e0dae9 JK	93	memcpy (REG_ADDRESS (state, regnum), \
a6e0dae9 JK	94	&registers[REGISTER_BYTE (regnum)], \
f4f0d174	95	count*REGISTER_SIZE)
c2d751d5 JK	96	\f
	97	/*
	98	* Fetch inferiors registers for gdb.
	99	* REGNO specifies which (as gdb views it) register, -1 for all.
	100	*/
	101
	102	void
	103	fetch_inferior_registers (regno)
	104	int regno;
	105	{
	106	kern_return_t ret;
	107	thread_state_data_t state;
	108	unsigned int stateCnt = i386_THREAD_STATE_COUNT;
	109	int index;
	110
	111	if (! MACH_PORT_VALID (current_thread))
	112	error ("fetch inferior registers: Invalid thread");
	113
	114	if (must_suspend_thread)
	115	setup_thread (current_thread, 1);
	116
	117	ret = thread_get_state (current_thread,
	118	i386_THREAD_STATE,
	119	state,
	120	&stateCnt);
	121
	122	if (ret != KERN_SUCCESS)
493424b1	123	warning ("fetch_inferior_registers: %s ",
c2d751d5 JK	124	mach_error_string (ret));
	125	#if 0
	126	/* It may be more effective to store validate all of them,
	127	* since we fetched them all anyway
	128	*/
	129	else if (regno != -1)
	130	supply_register (regno, (char *)state+reg_offset[regno]);
	131	#endif
	132	else
	133	{
	134	for (index = 0; index < NUM_REGS; index++)
	135	supply_register (index, (char *)state+reg_offset[index]);
	136	}
	137
	138	if (must_suspend_thread)
	139	setup_thread (current_thread, 0);
	140	}
	141	\f
	142	/* Store our register values back into the inferior.
	143	* If REGNO is -1, do this for all registers.
	144	* Otherwise, REGNO specifies which register
	145	*
	146	* On mach3 all registers are always saved in one call.
	147	*/
	148	void
	149	store_inferior_registers (regno)
	150	int regno;
	151	{
	152	kern_return_t ret;
	153	thread_state_data_t state;
	154	unsigned int stateCnt = i386_THREAD_STATE_COUNT;
	155	register int index;
	156
	157	if (! MACH_PORT_VALID (current_thread))
	158	error ("store inferior registers: Invalid thread");
	159
	160	if (must_suspend_thread)
	161	setup_thread (current_thread, 1);
	162
	163	/* Fetch the state of the current thread */
	164	ret = thread_get_state (current_thread,
	165	i386_THREAD_STATE,
	166	state,
	167	&stateCnt);
	168
	169	if (ret != KERN_SUCCESS)
	170	{
493424b1	171	warning ("store_inferior_registers (get): %s",
c2d751d5 JK	172	mach_error_string (ret));
	173	if (must_suspend_thread)
	174	setup_thread (current_thread, 0);
	175	return;
	176	}
	177
	178	/* move gdb's registers to thread's state
	179	*
	180	* Since we save all registers anyway, save the ones
	181	* that gdb thinks are valid (e.g. ignore the regno
	182	* parameter)
	183	*/
	184	#if 0
	185	if (regno != -1)
	186	STORE_REGS (state, regno, 1);
	187	else
	188	#endif
	189	{
	190	for (index = 0; index < NUM_REGS; index++)
	191	STORE_REGS (state, index, 1);
	192	}
	193
	194	/* Write gdb's current view of register to the thread
	195	*/
	196	ret = thread_set_state (current_thread,
	197	i386_THREAD_STATE,
	198	state,
	199	i386_THREAD_STATE_COUNT);
	200
	201	if (ret != KERN_SUCCESS)
493424b1	202	warning ("store_inferior_registers (set): %s",
c2d751d5 JK	203	mach_error_string (ret));
	204
	205	if (must_suspend_thread)
	206	setup_thread (current_thread, 0);
	207	}
	208
	209	\f
	210
	211	/* Return the address in the core dump or inferior of register REGNO.
	212	* BLOCKEND should be the address of the end of the UPAGES area read
	213	* in memory, but it's not?
	214	*
	215	* Currently our UX server dumps the whole thread state to the
	216	* core file. If your UX does something else, adapt the routine
	217	* below to return the offset to the given register.
	218	*
a1df8e78	219	* Called by core-aout.c(fetch_core_registers)
c2d751d5 JK	220	*/
c2d751d5 JK	221
948a9d92	222	CORE_ADDR
c2d751d5 JK	223	register_addr (regno, blockend)
c2d751d5 JK	224	int regno;
948a9d92	225	CORE_ADDR blockend;
c2d751d5	226	{
948a9d92	227	CORE_ADDR addr;
c2d751d5 JK	228
	229	if (regno < 0 \|\| regno >= NUM_REGS)
	230	error ("Invalid register number %d.", regno);
	231
	232	/* UAREA_SIZE == 8 kB in i386 */
	233	addr = (unsigned int)REG_ADDRESS (UAREA_SIZE - sizeof(struct i386_thread_state), regno);
	234
	235	return addr;
	236	}
	237
	238	/* jtv@hut.fi: I copied and modified this 387 code from
	239	* gdb/i386-xdep.c. Modifications for Mach 3.0.
	240	*
	241	* i387 status dumper. See also i387-tdep.c
	242	*/
	243	struct env387
	244	{
	245	unsigned short control;
	246	unsigned short r0;
	247	unsigned short status;
	248	unsigned short r1;
	249	unsigned short tag;
	250	unsigned short r2;
	251	unsigned long eip;
	252	unsigned short code_seg;
	253	unsigned short opcode;
	254	unsigned long operand;
	255	unsigned short operand_seg;
	256	unsigned short r3;
	257	unsigned char regs[8][10];
	258	};
	259	/* This routine is machine independent?
	260	* Should move it to i387-tdep.c but you need to export struct env387
	261	*/
	262	private
	263	print_387_status (status, ep)
	264	unsigned short status;
	265	struct env387 *ep;
	266	{
	267	int i;
	268	int bothstatus;
	269	int top;
	270	int fpreg;
	271	unsigned char *p;
	272
	273	bothstatus = ((status != 0) && (ep->status != 0));
	274	if (status != 0)
	275	{
	276	if (bothstatus)
199b2450	277	printf_unfiltered ("u: ");
c2d751d5 JK	278	print_387_status_word (status);
	279	}
	280
	281	if (ep->status != 0)
	282	{
	283	if (bothstatus)
199b2450	284	printf_unfiltered ("e: ");
c2d751d5 JK	285	print_387_status_word (ep->status);
	286	}
	287
	288	print_387_control_word (ep->control);
199b2450 TL	289	printf_unfiltered ("last exception: ");
	290	printf_unfiltered ("opcode %s; ", local_hex_string(ep->opcode));
	291	printf_unfiltered ("pc %s:", local_hex_string(ep->code_seg));
	292	printf_unfiltered ("%s; ", local_hex_string(ep->eip));
	293	printf_unfiltered ("operand %s", local_hex_string(ep->operand_seg));
	294	printf_unfiltered (":%s\n", local_hex_string(ep->operand));
c2d751d5 JK	295
	296	top = (ep->status >> 11) & 7;
	297
199b2450	298	printf_unfiltered ("regno tag msb lsb value\n");
c2d751d5 JK	299	for (fpreg = 7; fpreg >= 0; fpreg--)
	300	{
	301	double val;
	302
199b2450	303	printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
c2d751d5 JK	304
	305	switch ((ep->tag >> (fpreg * 2)) & 3)
	306	{
199b2450 TL	307	case 0: printf_unfiltered ("valid "); break;
	308	case 1: printf_unfiltered ("zero "); break;
	309	case 2: printf_unfiltered ("trap "); break;
	310	case 3: printf_unfiltered ("empty "); break;
c2d751d5 JK	311	}
c2d751d5 JK	312	for (i = 9; i >= 0; i--)
199b2450	313	printf_unfiltered ("%02x", ep->regs[fpreg][i]);
c2d751d5	314
48792545	315	floatformat_to_double (&floatformat_i387_ext, (char *)ep->regs[fpreg],
c2d751d5	316	&val);
199b2450	317	printf_unfiltered (" %g\n", val);
c2d751d5 JK	318	}
c2d751d5 JK	319	if (ep->r0)
199b2450	320	printf_unfiltered ("warning: reserved0 is %s\n", local_hex_string(ep->r0));
c2d751d5	321	if (ep->r1)
199b2450	322	printf_unfiltered ("warning: reserved1 is %s\n", local_hex_string(ep->r1));
c2d751d5	323	if (ep->r2)
199b2450	324	printf_unfiltered ("warning: reserved2 is %s\n", local_hex_string(ep->r2));
c2d751d5	325	if (ep->r3)
199b2450	326	printf_unfiltered ("warning: reserved3 is %s\n", local_hex_string(ep->r3));
c2d751d5 JK	327	}
	328
	329	/*
	330	* values that go into fp_kind (from <i386/fpreg.h>)
	331	*/
	332	#define FP_NO 0 /* no fp chip, no emulator (no fp support) */
	333	#define FP_SW 1 /* no fp chip, using software emulator */
	334	#define FP_HW 2 /* chip present bit */
	335	#define FP_287 2 /* 80287 chip present */
	336	#define FP_387 3 /* 80387 chip present */
	337
	338	typedef struct fpstate {
	339	#if 1
	340	unsigned char state[FP_STATE_BYTES]; /* "hardware" state */
	341	#else
	342	struct env387 state; /* Actually this */
	343	#endif
	344	int status; /* Duplicate status */
	345	} *fpstate_t;
	346
	347	/* Mach 3 specific routines.
	348	*/
	349	private boolean_t
	350	get_i387_state (fstate)
	351	struct fpstate *fstate;
	352	{
	353	kern_return_t ret;
	354	thread_state_data_t state;
	355	unsigned int fsCnt = i386_FLOAT_STATE_COUNT;
	356	struct i386_float_state *fsp;
	357
	358	ret = thread_get_state (current_thread,
	359	i386_FLOAT_STATE,
	360	state,
	361	&fsCnt);
	362
	363	if (ret != KERN_SUCCESS)
	364	{
493424b1	365	warning ("Can not get live floating point state: %s",
c2d751d5 JK	366	mach_error_string (ret));
	367	return FALSE;
	368	}
	369
	370	fsp = (struct i386_float_state *)state;
	371	/* The 387 chip (also 486 counts) or a software emulator? */
	372	if (!fsp->initialized \|\| (fsp->fpkind != FP_387 && fsp->fpkind != FP_SW))
	373	return FALSE;
	374
	375	/* Clear the target then copy thread's float state there.
	376	Make a copy of the status word, for some reason?
	377	*/
c4ad6b09	378	memset (fstate, 0, sizeof (struct fpstate));
c2d751d5 JK	379
	380	fstate->status = fsp->exc_status;
	381
a6e0dae9	382	memcpy (fstate->state, (char *)&fsp->hw_state, FP_STATE_BYTES);
c2d751d5 JK	383
	384	return TRUE;
	385	}
	386
	387	private boolean_t
	388	get_i387_core_state (fstate)
	389	struct fpstate *fstate;
	390	{
	391	/* Not implemented yet. Core files do not contain float state. */
	392	return FALSE;
	393	}
	394
	395	/*
	396	* This is called by "info float" command
	397	*/
	398	void
	399	i386_mach3_float_info()
	400	{
	401	char buf [sizeof (struct fpstate) + 2 * sizeof (int)];
	402	boolean_t valid = FALSE;
	403	fpstate_t fps;
	404
	405	if (target_has_execution)
	406	valid = get_i387_state (buf);
	407	#if 0
	408	else if (WE HAVE CORE FILE) /* @@@@ Core files not supported */
	409	valid = get_i387_core_state (buf);
	410	#endif
	411
	412	if (!valid)
	413	{
493424b1	414	warning ("no floating point status saved");
c2d751d5 JK	415	return;
	416	}
	417
	418	fps = (fpstate_t) buf;
	419
	420	print_387_status (fps->status, (struct env387 *)fps->state);
	421	}