1 /* Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
3 This file is part of GDB.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "win32-low.h"
22 #ifndef CONTEXT_EXTENDED_REGISTERS
23 #define CONTEXT_EXTENDED_REGISTERS 0
29 #define FLAG_TRACE_BIT 0x100
32 /* Defined in auto-generated file reg-amd64.c. */
33 void init_registers_amd64 (void);
35 /* Defined in auto-generated file reg-i386.c. */
36 void init_registers_i386 (void);
39 static struct i386_debug_reg_state debug_reg_state
;
40 static unsigned dr_status_mirror
;
41 static unsigned dr_control_mirror
;
43 static int debug_registers_changed
= 0;
44 static int debug_registers_used
= 0;
46 /* Update the inferior's debug register REGNUM from STATE. */
49 i386_dr_low_set_addr (const struct i386_debug_reg_state
*state
, int regnum
)
51 if (! (regnum
>= 0 && regnum
<= DR_LASTADDR
- DR_FIRSTADDR
))
52 fatal ("Invalid debug register %d", regnum
);
54 /* debug_reg_state.dr_mirror is already set.
55 Just notify i386_set_thread_context, i386_thread_added
56 that the registers need to be updated. */
57 debug_registers_changed
= 1;
58 debug_registers_used
= 1;
62 i386_dr_low_get_addr (int regnum
)
64 gdb_assert (DR_FIRSTADDR
<= regnum
&& regnum
<= DR_LASTADDR
);
66 return debug_reg_state
.dr_mirror
[regnum
];
69 /* Update the inferior's DR7 debug control register from STATE. */
72 i386_dr_low_set_control (const struct i386_debug_reg_state
*state
)
74 /* debug_reg_state.dr_control_mirror is already set.
75 Just notify i386_set_thread_context, i386_thread_added
76 that the registers need to be updated. */
77 debug_registers_changed
= 1;
78 debug_registers_used
= 1;
82 i386_dr_low_get_control (void)
84 return dr_control_mirror
;
87 /* Get the value of the DR6 debug status register from the inferior
88 and record it in STATE. */
91 i386_dr_low_get_status (void)
93 /* We don't need to do anything here, the last call to thread_rec for
94 current_event.dwThreadId id has already set it. */
95 return dr_status_mirror
;
98 /* Watchpoint support. */
101 i386_insert_point (char type
, CORE_ADDR addr
, int len
)
108 return i386_low_insert_watchpoint (&debug_reg_state
,
117 i386_remove_point (char type
, CORE_ADDR addr
, int len
)
124 return i386_low_remove_watchpoint (&debug_reg_state
,
133 i386_stopped_by_watchpoint (void)
135 return i386_low_stopped_by_watchpoint (&debug_reg_state
);
139 i386_stopped_data_address (void)
142 if (i386_low_stopped_data_address (&debug_reg_state
, &addr
))
148 i386_initial_stuff (void)
150 i386_low_init_dregs (&debug_reg_state
);
151 debug_registers_changed
= 0;
152 debug_registers_used
= 0;
153 dr_status_mirror
= 0;
154 dr_control_mirror
= 0;
158 i386_get_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
160 /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
161 the system doesn't support extended registers. */
162 static DWORD extended_registers
= CONTEXT_EXTENDED_REGISTERS
;
165 th
->context
.ContextFlags
= (CONTEXT_FULL
166 | CONTEXT_FLOATING_POINT
167 | CONTEXT_DEBUG_REGISTERS
168 | extended_registers
);
170 if (!GetThreadContext (th
->h
, &th
->context
))
172 DWORD e
= GetLastError ();
174 if (extended_registers
&& e
== ERROR_INVALID_PARAMETER
)
176 extended_registers
= 0;
180 error ("GetThreadContext failure %ld\n", (long) e
);
183 debug_registers_changed
= 0;
185 if (th
->tid
== current_event
->dwThreadId
)
187 /* Copy dr values from the current thread. */
188 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
189 dr
->dr_mirror
[0] = th
->context
.Dr0
;
190 dr
->dr_mirror
[1] = th
->context
.Dr1
;
191 dr
->dr_mirror
[2] = th
->context
.Dr2
;
192 dr
->dr_mirror
[3] = th
->context
.Dr3
;
193 dr_status_mirror
= th
->context
.Dr6
;
194 dr_control_mirror
= th
->context
.Dr7
;
199 i386_set_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
201 if (debug_registers_changed
)
203 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
204 th
->context
.Dr0
= dr
->dr_mirror
[0];
205 th
->context
.Dr1
= dr
->dr_mirror
[1];
206 th
->context
.Dr2
= dr
->dr_mirror
[2];
207 th
->context
.Dr3
= dr
->dr_mirror
[3];
208 /* th->context.Dr6 = dr_status_mirror;
209 FIXME: should we set dr6 also ?? */
210 th
->context
.Dr7
= dr_control_mirror
;
213 SetThreadContext (th
->h
, &th
->context
);
217 i386_thread_added (win32_thread_info
*th
)
219 /* Set the debug registers for the new thread if they are used. */
220 if (debug_registers_used
)
222 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
223 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
224 GetThreadContext (th
->h
, &th
->context
);
226 th
->context
.Dr0
= dr
->dr_mirror
[0];
227 th
->context
.Dr1
= dr
->dr_mirror
[1];
228 th
->context
.Dr2
= dr
->dr_mirror
[2];
229 th
->context
.Dr3
= dr
->dr_mirror
[3];
230 /* th->context.Dr6 = dr_status_mirror;
231 FIXME: should we set dr6 also ?? */
232 th
->context
.Dr7
= dr_control_mirror
;
234 SetThreadContext (th
->h
, &th
->context
);
235 th
->context
.ContextFlags
= 0;
240 i386_single_step (win32_thread_info
*th
)
242 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
247 /* An array of offset mappings into a Win32 Context structure.
248 This is a one-to-one mapping which is indexed by gdb's register
249 numbers. It retrieves an offset into the context structure where
250 the 4 byte register is located.
251 An offset value of -1 indicates that Win32 does not provide this
252 register in it's CONTEXT structure. In this case regptr will return
253 a pointer into a dummy register. */
254 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
255 static const int mappings
[] = {
256 context_offset (Eax
),
257 context_offset (Ecx
),
258 context_offset (Edx
),
259 context_offset (Ebx
),
260 context_offset (Esp
),
261 context_offset (Ebp
),
262 context_offset (Esi
),
263 context_offset (Edi
),
264 context_offset (Eip
),
265 context_offset (EFlags
),
266 context_offset (SegCs
),
267 context_offset (SegSs
),
268 context_offset (SegDs
),
269 context_offset (SegEs
),
270 context_offset (SegFs
),
271 context_offset (SegGs
),
272 context_offset (FloatSave
.RegisterArea
[0 * 10]),
273 context_offset (FloatSave
.RegisterArea
[1 * 10]),
274 context_offset (FloatSave
.RegisterArea
[2 * 10]),
275 context_offset (FloatSave
.RegisterArea
[3 * 10]),
276 context_offset (FloatSave
.RegisterArea
[4 * 10]),
277 context_offset (FloatSave
.RegisterArea
[5 * 10]),
278 context_offset (FloatSave
.RegisterArea
[6 * 10]),
279 context_offset (FloatSave
.RegisterArea
[7 * 10]),
280 context_offset (FloatSave
.ControlWord
),
281 context_offset (FloatSave
.StatusWord
),
282 context_offset (FloatSave
.TagWord
),
283 context_offset (FloatSave
.ErrorSelector
),
284 context_offset (FloatSave
.ErrorOffset
),
285 context_offset (FloatSave
.DataSelector
),
286 context_offset (FloatSave
.DataOffset
),
287 context_offset (FloatSave
.ErrorSelector
),
289 context_offset (ExtendedRegisters
[10 * 16]),
290 context_offset (ExtendedRegisters
[11 * 16]),
291 context_offset (ExtendedRegisters
[12 * 16]),
292 context_offset (ExtendedRegisters
[13 * 16]),
293 context_offset (ExtendedRegisters
[14 * 16]),
294 context_offset (ExtendedRegisters
[15 * 16]),
295 context_offset (ExtendedRegisters
[16 * 16]),
296 context_offset (ExtendedRegisters
[17 * 16]),
298 context_offset (ExtendedRegisters
[24])
300 #undef context_offset
302 #else /* __x86_64__ */
304 #define context_offset(x) (offsetof (CONTEXT, x))
305 static const int mappings
[] =
307 context_offset (Rax
),
308 context_offset (Rbx
),
309 context_offset (Rcx
),
310 context_offset (Rdx
),
311 context_offset (Rsi
),
312 context_offset (Rdi
),
313 context_offset (Rbp
),
314 context_offset (Rsp
),
317 context_offset (R10
),
318 context_offset (R11
),
319 context_offset (R12
),
320 context_offset (R13
),
321 context_offset (R14
),
322 context_offset (R15
),
323 context_offset (Rip
),
324 context_offset (EFlags
),
325 context_offset (SegCs
),
326 context_offset (SegSs
),
327 context_offset (SegDs
),
328 context_offset (SegEs
),
329 context_offset (SegFs
),
330 context_offset (SegGs
),
331 context_offset (FloatSave
.FloatRegisters
[0]),
332 context_offset (FloatSave
.FloatRegisters
[1]),
333 context_offset (FloatSave
.FloatRegisters
[2]),
334 context_offset (FloatSave
.FloatRegisters
[3]),
335 context_offset (FloatSave
.FloatRegisters
[4]),
336 context_offset (FloatSave
.FloatRegisters
[5]),
337 context_offset (FloatSave
.FloatRegisters
[6]),
338 context_offset (FloatSave
.FloatRegisters
[7]),
339 context_offset (FloatSave
.ControlWord
),
340 context_offset (FloatSave
.StatusWord
),
341 context_offset (FloatSave
.TagWord
),
342 context_offset (FloatSave
.ErrorSelector
),
343 context_offset (FloatSave
.ErrorOffset
),
344 context_offset (FloatSave
.DataSelector
),
345 context_offset (FloatSave
.DataOffset
),
346 context_offset (FloatSave
.ErrorSelector
)
348 context_offset (Xmm0
),
349 context_offset (Xmm1
),
350 context_offset (Xmm2
),
351 context_offset (Xmm3
),
352 context_offset (Xmm4
),
353 context_offset (Xmm5
),
354 context_offset (Xmm6
),
355 context_offset (Xmm7
),
356 context_offset (Xmm8
),
357 context_offset (Xmm9
),
358 context_offset (Xmm10
),
359 context_offset (Xmm11
),
360 context_offset (Xmm12
),
361 context_offset (Xmm13
),
362 context_offset (Xmm14
),
363 context_offset (Xmm15
),
365 context_offset (FloatSave
.MxCsr
)
367 #undef context_offset
369 #endif /* __x86_64__ */
371 /* Fetch register from gdbserver regcache data. */
373 i386_fetch_inferior_register (struct regcache
*regcache
,
374 win32_thread_info
*th
, int r
)
376 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
381 l
= *((long *) context_offset
) & 0xffff;
382 supply_register (regcache
, r
, (char *) &l
);
384 else if (r
== FOP_REGNUM
)
386 l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
387 supply_register (regcache
, r
, (char *) &l
);
390 supply_register (regcache
, r
, context_offset
);
393 /* Store a new register value into the thread context of TH. */
395 i386_store_inferior_register (struct regcache
*regcache
,
396 win32_thread_info
*th
, int r
)
398 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
399 collect_register (regcache
, r
, context_offset
);
402 static const unsigned char i386_win32_breakpoint
= 0xcc;
403 #define i386_win32_breakpoint_len 1
406 init_windows_x86 (void)
409 init_registers_amd64 ();
411 init_registers_i386 ();
415 struct win32_target_ops the_low_target
= {
417 sizeof (mappings
) / sizeof (mappings
[0]),
419 i386_get_thread_context
,
420 i386_set_thread_context
,
422 i386_fetch_inferior_register
,
423 i386_store_inferior_register
,
425 &i386_win32_breakpoint
,
426 i386_win32_breakpoint_len
,
429 i386_stopped_by_watchpoint
,
430 i386_stopped_data_address