1 /* Low level interface to I386 running mach 3.0.
2 Copyright (C) 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
23 #include "floatformat.h"
28 #include <mach/message.h>
29 #include <mach/exception.h>
30 #include <mach_error.h>
32 /* Hmmm... Should this not be here?
33 * Now for i386_float_info() target_has_execution
37 /* This mess is duplicated in bfd/i386mach3.h
39 * This is an ugly way to hack around the incorrect
40 * definition of UPAGES in i386/machparam.h.
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
47 #include <sys/param.h>
49 #define UAREA_SIZE ctob(UPAGES)
51 #define UAREA_SIZE (NBPG*UPAGES)
53 FIXME
! !UPAGES is neither
2 nor
16
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 ();
60 #define private static
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 :-)
68 #define REG_OFFSET(reg) (int)(&((struct i386_thread_state *)0)->reg)
70 /* at reg_offset[i] is the offset to the i386_thread_state
71 * location where the gdb registers[i] is stored.
74 static int reg_offset
[] =
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
)
82 #define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
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.
87 #define FETCH_REGS(state, regnum, count) \
88 memcpy (®isters[REGISTER_BYTE (regnum)], \
89 REG_ADDRESS (state, regnum), \
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 ®isters[REGISTER_BYTE (regnum)], \
99 * Fetch inferiors registers for gdb.
100 * REGNO specifies which (as gdb views it) register, -1 for all.
104 fetch_inferior_registers (regno
)
108 thread_state_data_t state
;
109 unsigned int stateCnt
= i386_THREAD_STATE_COUNT
;
112 if (!MACH_PORT_VALID (current_thread
))
113 error ("fetch inferior registers: Invalid thread");
115 if (must_suspend_thread
)
116 setup_thread (current_thread
, 1);
118 ret
= thread_get_state (current_thread
,
123 if (ret
!= KERN_SUCCESS
)
124 warning ("fetch_inferior_registers: %s ",
125 mach_error_string (ret
));
127 /* It may be more effective to store validate all of them,
128 * since we fetched them all anyway
130 else if (regno
!= -1)
131 supply_register (regno
, (char *) state
+ reg_offset
[regno
]);
135 for (index
= 0; index
< NUM_REGS
; index
++)
136 supply_register (index
, (char *) state
+ reg_offset
[index
]);
139 if (must_suspend_thread
)
140 setup_thread (current_thread
, 0);
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
147 * On mach3 all registers are always saved in one call.
150 store_inferior_registers (regno
)
154 thread_state_data_t state
;
155 unsigned int stateCnt
= i386_THREAD_STATE_COUNT
;
158 if (!MACH_PORT_VALID (current_thread
))
159 error ("store inferior registers: Invalid thread");
161 if (must_suspend_thread
)
162 setup_thread (current_thread
, 1);
164 /* Fetch the state of the current thread */
165 ret
= thread_get_state (current_thread
,
170 if (ret
!= KERN_SUCCESS
)
172 warning ("store_inferior_registers (get): %s",
173 mach_error_string (ret
));
174 if (must_suspend_thread
)
175 setup_thread (current_thread
, 0);
179 /* move gdb's registers to thread's state
181 * Since we save all registers anyway, save the ones
182 * that gdb thinks are valid (e.g. ignore the regno
187 STORE_REGS (state
, regno
, 1);
191 for (index
= 0; index
< NUM_REGS
; index
++)
192 STORE_REGS (state
, index
, 1);
195 /* Write gdb's current view of register to the thread
197 ret
= thread_set_state (current_thread
,
200 i386_THREAD_STATE_COUNT
);
202 if (ret
!= KERN_SUCCESS
)
203 warning ("store_inferior_registers (set): %s",
204 mach_error_string (ret
));
206 if (must_suspend_thread
)
207 setup_thread (current_thread
, 0);
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?
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.
220 * Called by core-aout.c(fetch_core_registers)
224 register_addr (regno
, blockend
)
230 if (regno
< 0 || regno
>= NUM_REGS
)
231 error ("Invalid register number %d.", regno
);
233 /* UAREA_SIZE == 8 kB in i386 */
234 addr
= (unsigned int) REG_ADDRESS (UAREA_SIZE
- sizeof (struct i386_thread_state
), regno
);
239 /* jtv@hut.fi: I copied and modified this 387 code from
240 * gdb/i386-xdep.c. Modifications for Mach 3.0.
242 * i387 status dumper. See also i387-tdep.c
246 unsigned short control
;
248 unsigned short status
;
253 unsigned short code_seg
;
254 unsigned short opcode
;
255 unsigned long operand
;
256 unsigned short operand_seg
;
258 unsigned char regs
[8][10];
260 /* This routine is machine independent?
261 * Should move it to i387-tdep.c but you need to export struct env387
264 print_387_status (status
, ep
)
265 unsigned short status
;
274 bothstatus
= ((status
!= 0) && (ep
->status
!= 0));
278 printf_unfiltered ("u: ");
279 print_387_status_word (status
);
285 printf_unfiltered ("e: ");
286 print_387_status_word (ep
->status
);
289 print_387_control_word (ep
->control
);
290 printf_unfiltered ("last exception: ");
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
));
297 top
= (ep
->status
>> 11) & 7;
299 printf_unfiltered ("regno tag msb lsb value\n");
300 for (fpreg
= 7; fpreg
>= 0; fpreg
--)
304 printf_unfiltered ("%s %d: ", fpreg
== top
? "=>" : " ", fpreg
);
306 switch ((ep
->tag
>> (fpreg
* 2)) & 3)
309 printf_unfiltered ("valid ");
312 printf_unfiltered ("zero ");
315 printf_unfiltered ("trap ");
318 printf_unfiltered ("empty ");
321 for (i
= 9; i
>= 0; i
--)
322 printf_unfiltered ("%02x", ep
->regs
[fpreg
][i
]);
324 floatformat_to_double (&floatformat_i387_ext
, (char *) ep
->regs
[fpreg
],
326 printf_unfiltered (" %g\n", val
);
329 printf_unfiltered ("warning: reserved0 is %s\n", local_hex_string (ep
->r0
));
331 printf_unfiltered ("warning: reserved1 is %s\n", local_hex_string (ep
->r1
));
333 printf_unfiltered ("warning: reserved2 is %s\n", local_hex_string (ep
->r2
));
335 printf_unfiltered ("warning: reserved3 is %s\n", local_hex_string (ep
->r3
));
339 * values that go into fp_kind (from <i386/fpreg.h>)
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 */
347 typedef struct fpstate
350 unsigned char state
[FP_STATE_BYTES
]; /* "hardware" state */
352 struct env387 state
; /* Actually this */
354 int status
; /* Duplicate status */
358 /* Mach 3 specific routines.
361 get_i387_state (fstate
)
362 struct fpstate
*fstate
;
365 thread_state_data_t state
;
366 unsigned int fsCnt
= i386_FLOAT_STATE_COUNT
;
367 struct i386_float_state
*fsp
;
369 ret
= thread_get_state (current_thread
,
374 if (ret
!= KERN_SUCCESS
)
376 warning ("Can not get live floating point state: %s",
377 mach_error_string (ret
));
381 fsp
= (struct i386_float_state
*) state
;
382 /* The 387 chip (also 486 counts) or a software emulator? */
383 if (!fsp
->initialized
|| (fsp
->fpkind
!= FP_387
&& fsp
->fpkind
!= FP_SW
))
386 /* Clear the target then copy thread's float state there.
387 Make a copy of the status word, for some reason?
389 memset (fstate
, 0, sizeof (struct fpstate
));
391 fstate
->status
= fsp
->exc_status
;
393 memcpy (fstate
->state
, (char *) &fsp
->hw_state
, FP_STATE_BYTES
);
399 get_i387_core_state (fstate
)
400 struct fpstate
*fstate
;
402 /* Not implemented yet. Core files do not contain float state. */
407 * This is called by "info float" command
410 i386_mach3_float_info ()
412 char buf
[sizeof (struct fpstate
) + 2 * sizeof (int)];
413 boolean_t valid
= FALSE
;
416 if (target_has_execution
)
417 valid
= get_i387_state (buf
);
419 else if (WE HAVE CORE
FILE) /* @@@@ Core files not supported */
420 valid
= get_i387_core_state (buf
);
425 warning ("no floating point status saved");
429 fps
= (fpstate_t
) buf
;
431 print_387_status (fps
->status
, (struct env387
*) fps
->state
);