1 /* Copyright (C) 2007-2012 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
;
41 static int debug_registers_changed
= 0;
42 static int debug_registers_used
= 0;
44 /* Update the inferior's debug register REGNUM from STATE. */
47 i386_dr_low_set_addr (const struct i386_debug_reg_state
*state
, int regnum
)
49 if (! (regnum
>= 0 && regnum
<= DR_LASTADDR
- DR_FIRSTADDR
))
50 fatal ("Invalid debug register %d", regnum
);
52 /* debug_reg_state.dr_mirror is already set.
53 Just notify i386_set_thread_context, i386_thread_added
54 that the registers need to be updated. */
55 debug_registers_changed
= 1;
56 debug_registers_used
= 1;
60 i386_dr_low_get_addr (int regnum
)
62 gdb_assert (DR_FIRSTADDR
<= regnum
&& regnum
<= DR_LASTADDR
);
64 return debug_reg_state
.dr_mirror
[regnum
];
67 /* Update the inferior's DR7 debug control register from STATE. */
70 i386_dr_low_set_control (const struct i386_debug_reg_state
*state
)
72 /* debug_reg_state.dr_control_mirror is already set.
73 Just notify i386_set_thread_context, i386_thread_added
74 that the registers need to be updated. */
75 debug_registers_changed
= 1;
76 debug_registers_used
= 1;
80 i386_dr_low_get_control (void)
82 return debug_reg_state
.dr_control_mirror
;
85 /* Get the value of the DR6 debug status register from the inferior
86 and record it in STATE. */
89 i386_dr_low_get_status (void)
91 /* We don't need to do anything here, the last call to thread_rec for
92 current_event.dwThreadId id has already set it. */
93 return debug_reg_state
.dr_status_mirror
;
96 /* Watchpoint support. */
99 i386_insert_point (char type
, CORE_ADDR addr
, int len
)
106 return i386_low_insert_watchpoint (&debug_reg_state
,
115 i386_remove_point (char type
, CORE_ADDR addr
, int len
)
122 return i386_low_remove_watchpoint (&debug_reg_state
,
131 i386_stopped_by_watchpoint (void)
133 return i386_low_stopped_by_watchpoint (&debug_reg_state
);
137 i386_stopped_data_address (void)
140 if (i386_low_stopped_data_address (&debug_reg_state
, &addr
))
146 i386_initial_stuff (void)
148 i386_low_init_dregs (&debug_reg_state
);
149 debug_registers_changed
= 0;
150 debug_registers_used
= 0;
154 i386_get_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
156 /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
157 the system doesn't support extended registers. */
158 static DWORD extended_registers
= CONTEXT_EXTENDED_REGISTERS
;
161 th
->context
.ContextFlags
= (CONTEXT_FULL
162 | CONTEXT_FLOATING_POINT
163 | CONTEXT_DEBUG_REGISTERS
164 | extended_registers
);
166 if (!GetThreadContext (th
->h
, &th
->context
))
168 DWORD e
= GetLastError ();
170 if (extended_registers
&& e
== ERROR_INVALID_PARAMETER
)
172 extended_registers
= 0;
176 error ("GetThreadContext failure %ld\n", (long) e
);
179 debug_registers_changed
= 0;
181 if (th
->tid
== current_event
->dwThreadId
)
183 /* Copy dr values from the current thread. */
184 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
185 dr
->dr_mirror
[0] = th
->context
.Dr0
;
186 dr
->dr_mirror
[1] = th
->context
.Dr1
;
187 dr
->dr_mirror
[2] = th
->context
.Dr2
;
188 dr
->dr_mirror
[3] = th
->context
.Dr3
;
189 dr
->dr_status_mirror
= th
->context
.Dr6
;
190 dr
->dr_control_mirror
= th
->context
.Dr7
;
195 i386_set_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
197 if (debug_registers_changed
)
199 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
200 th
->context
.Dr0
= dr
->dr_mirror
[0];
201 th
->context
.Dr1
= dr
->dr_mirror
[1];
202 th
->context
.Dr2
= dr
->dr_mirror
[2];
203 th
->context
.Dr3
= dr
->dr_mirror
[3];
204 /* th->context.Dr6 = dr->dr_status_mirror;
205 FIXME: should we set dr6 also ?? */
206 th
->context
.Dr7
= dr
->dr_control_mirror
;
209 SetThreadContext (th
->h
, &th
->context
);
213 i386_thread_added (win32_thread_info
*th
)
215 /* Set the debug registers for the new thread if they are used. */
216 if (debug_registers_used
)
218 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
219 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
220 GetThreadContext (th
->h
, &th
->context
);
222 th
->context
.Dr0
= dr
->dr_mirror
[0];
223 th
->context
.Dr1
= dr
->dr_mirror
[1];
224 th
->context
.Dr2
= dr
->dr_mirror
[2];
225 th
->context
.Dr3
= dr
->dr_mirror
[3];
226 /* th->context.Dr6 = dr->dr_status_mirror;
227 FIXME: should we set dr6 also ?? */
228 th
->context
.Dr7
= dr
->dr_control_mirror
;
230 SetThreadContext (th
->h
, &th
->context
);
231 th
->context
.ContextFlags
= 0;
236 i386_single_step (win32_thread_info
*th
)
238 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
243 /* An array of offset mappings into a Win32 Context structure.
244 This is a one-to-one mapping which is indexed by gdb's register
245 numbers. It retrieves an offset into the context structure where
246 the 4 byte register is located.
247 An offset value of -1 indicates that Win32 does not provide this
248 register in it's CONTEXT structure. In this case regptr will return
249 a pointer into a dummy register. */
250 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
251 static const int mappings
[] = {
252 context_offset (Eax
),
253 context_offset (Ecx
),
254 context_offset (Edx
),
255 context_offset (Ebx
),
256 context_offset (Esp
),
257 context_offset (Ebp
),
258 context_offset (Esi
),
259 context_offset (Edi
),
260 context_offset (Eip
),
261 context_offset (EFlags
),
262 context_offset (SegCs
),
263 context_offset (SegSs
),
264 context_offset (SegDs
),
265 context_offset (SegEs
),
266 context_offset (SegFs
),
267 context_offset (SegGs
),
268 context_offset (FloatSave
.RegisterArea
[0 * 10]),
269 context_offset (FloatSave
.RegisterArea
[1 * 10]),
270 context_offset (FloatSave
.RegisterArea
[2 * 10]),
271 context_offset (FloatSave
.RegisterArea
[3 * 10]),
272 context_offset (FloatSave
.RegisterArea
[4 * 10]),
273 context_offset (FloatSave
.RegisterArea
[5 * 10]),
274 context_offset (FloatSave
.RegisterArea
[6 * 10]),
275 context_offset (FloatSave
.RegisterArea
[7 * 10]),
276 context_offset (FloatSave
.ControlWord
),
277 context_offset (FloatSave
.StatusWord
),
278 context_offset (FloatSave
.TagWord
),
279 context_offset (FloatSave
.ErrorSelector
),
280 context_offset (FloatSave
.ErrorOffset
),
281 context_offset (FloatSave
.DataSelector
),
282 context_offset (FloatSave
.DataOffset
),
283 context_offset (FloatSave
.ErrorSelector
),
285 context_offset (ExtendedRegisters
[10 * 16]),
286 context_offset (ExtendedRegisters
[11 * 16]),
287 context_offset (ExtendedRegisters
[12 * 16]),
288 context_offset (ExtendedRegisters
[13 * 16]),
289 context_offset (ExtendedRegisters
[14 * 16]),
290 context_offset (ExtendedRegisters
[15 * 16]),
291 context_offset (ExtendedRegisters
[16 * 16]),
292 context_offset (ExtendedRegisters
[17 * 16]),
294 context_offset (ExtendedRegisters
[24])
296 #undef context_offset
298 #else /* __x86_64__ */
300 #define context_offset(x) (offsetof (CONTEXT, x))
301 static const int mappings
[] =
303 context_offset (Rax
),
304 context_offset (Rbx
),
305 context_offset (Rcx
),
306 context_offset (Rdx
),
307 context_offset (Rsi
),
308 context_offset (Rdi
),
309 context_offset (Rbp
),
310 context_offset (Rsp
),
313 context_offset (R10
),
314 context_offset (R11
),
315 context_offset (R12
),
316 context_offset (R13
),
317 context_offset (R14
),
318 context_offset (R15
),
319 context_offset (Rip
),
320 context_offset (EFlags
),
321 context_offset (SegCs
),
322 context_offset (SegSs
),
323 context_offset (SegDs
),
324 context_offset (SegEs
),
325 context_offset (SegFs
),
326 context_offset (SegGs
),
327 context_offset (FloatSave
.FloatRegisters
[0]),
328 context_offset (FloatSave
.FloatRegisters
[1]),
329 context_offset (FloatSave
.FloatRegisters
[2]),
330 context_offset (FloatSave
.FloatRegisters
[3]),
331 context_offset (FloatSave
.FloatRegisters
[4]),
332 context_offset (FloatSave
.FloatRegisters
[5]),
333 context_offset (FloatSave
.FloatRegisters
[6]),
334 context_offset (FloatSave
.FloatRegisters
[7]),
335 context_offset (FloatSave
.ControlWord
),
336 context_offset (FloatSave
.StatusWord
),
337 context_offset (FloatSave
.TagWord
),
338 context_offset (FloatSave
.ErrorSelector
),
339 context_offset (FloatSave
.ErrorOffset
),
340 context_offset (FloatSave
.DataSelector
),
341 context_offset (FloatSave
.DataOffset
),
342 context_offset (FloatSave
.ErrorSelector
)
344 context_offset (Xmm0
),
345 context_offset (Xmm1
),
346 context_offset (Xmm2
),
347 context_offset (Xmm3
),
348 context_offset (Xmm4
),
349 context_offset (Xmm5
),
350 context_offset (Xmm6
),
351 context_offset (Xmm7
),
352 context_offset (Xmm8
),
353 context_offset (Xmm9
),
354 context_offset (Xmm10
),
355 context_offset (Xmm11
),
356 context_offset (Xmm12
),
357 context_offset (Xmm13
),
358 context_offset (Xmm14
),
359 context_offset (Xmm15
),
361 context_offset (FloatSave
.MxCsr
)
363 #undef context_offset
365 #endif /* __x86_64__ */
367 /* Fetch register from gdbserver regcache data. */
369 i386_fetch_inferior_register (struct regcache
*regcache
,
370 win32_thread_info
*th
, int r
)
372 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
377 l
= *((long *) context_offset
) & 0xffff;
378 supply_register (regcache
, r
, (char *) &l
);
380 else if (r
== FOP_REGNUM
)
382 l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
383 supply_register (regcache
, r
, (char *) &l
);
386 supply_register (regcache
, r
, context_offset
);
389 /* Store a new register value into the thread context of TH. */
391 i386_store_inferior_register (struct regcache
*regcache
,
392 win32_thread_info
*th
, int r
)
394 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
395 collect_register (regcache
, r
, context_offset
);
398 static const unsigned char i386_win32_breakpoint
= 0xcc;
399 #define i386_win32_breakpoint_len 1
402 init_windows_x86 (void)
405 init_registers_amd64 ();
407 init_registers_i386 ();
411 struct win32_target_ops the_low_target
= {
413 sizeof (mappings
) / sizeof (mappings
[0]),
415 i386_get_thread_context
,
416 i386_set_thread_context
,
418 i386_fetch_inferior_register
,
419 i386_store_inferior_register
,
421 &i386_win32_breakpoint
,
422 i386_win32_breakpoint_len
,
425 i386_stopped_by_watchpoint
,
426 i386_stopped_data_address