1 /* Copyright (C) 2007, 2008, 2009, 2010 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;
59 /* Update the inferior's DR7 debug control register from STATE. */
62 i386_dr_low_set_control (const struct i386_debug_reg_state
*state
)
64 /* debug_reg_state.dr_control_mirror is already set.
65 Just notify i386_set_thread_context, i386_thread_added
66 that the registers need to be updated. */
67 debug_registers_changed
= 1;
68 debug_registers_used
= 1;
71 /* Get the value of the DR6 debug status register from the inferior
72 and record it in STATE. */
75 i386_dr_low_get_status (struct i386_debug_reg_state
*state
)
77 /* We don't need to do anything here, the last call to thread_rec for
78 current_event.dwThreadId id has already set it. */
81 /* Watchpoint support. */
84 i386_insert_point (char type
, CORE_ADDR addr
, int len
)
91 return i386_low_insert_watchpoint (&debug_reg_state
,
100 i386_remove_point (char type
, CORE_ADDR addr
, int len
)
107 return i386_low_remove_watchpoint (&debug_reg_state
,
116 i386_stopped_by_watchpoint (void)
118 return i386_low_stopped_by_watchpoint (&debug_reg_state
);
122 i386_stopped_data_address (void)
125 if (i386_low_stopped_data_address (&debug_reg_state
, &addr
))
131 i386_initial_stuff (void)
133 i386_low_init_dregs (&debug_reg_state
);
134 debug_registers_changed
= 0;
135 debug_registers_used
= 0;
139 i386_get_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
141 /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
142 the system doesn't support extended registers. */
143 static DWORD extended_registers
= CONTEXT_EXTENDED_REGISTERS
;
146 th
->context
.ContextFlags
= (CONTEXT_FULL
147 | CONTEXT_FLOATING_POINT
148 | CONTEXT_DEBUG_REGISTERS
149 | extended_registers
);
151 if (!GetThreadContext (th
->h
, &th
->context
))
153 DWORD e
= GetLastError ();
155 if (extended_registers
&& e
== ERROR_INVALID_PARAMETER
)
157 extended_registers
= 0;
161 error ("GetThreadContext failure %ld\n", (long) e
);
164 debug_registers_changed
= 0;
166 if (th
->tid
== current_event
->dwThreadId
)
168 /* Copy dr values from the current thread. */
169 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
170 dr
->dr_mirror
[0] = th
->context
.Dr0
;
171 dr
->dr_mirror
[1] = th
->context
.Dr1
;
172 dr
->dr_mirror
[2] = th
->context
.Dr2
;
173 dr
->dr_mirror
[3] = th
->context
.Dr3
;
174 dr
->dr_status_mirror
= th
->context
.Dr6
;
175 dr
->dr_control_mirror
= th
->context
.Dr7
;
180 i386_set_thread_context (win32_thread_info
*th
, DEBUG_EVENT
* current_event
)
182 if (debug_registers_changed
)
184 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
185 th
->context
.Dr0
= dr
->dr_mirror
[0];
186 th
->context
.Dr1
= dr
->dr_mirror
[1];
187 th
->context
.Dr2
= dr
->dr_mirror
[2];
188 th
->context
.Dr3
= dr
->dr_mirror
[3];
189 /* th->context.Dr6 = dr->dr_status_mirror;
190 FIXME: should we set dr6 also ?? */
191 th
->context
.Dr7
= dr
->dr_control_mirror
;
194 SetThreadContext (th
->h
, &th
->context
);
198 i386_thread_added (win32_thread_info
*th
)
200 /* Set the debug registers for the new thread if they are used. */
201 if (debug_registers_used
)
203 struct i386_debug_reg_state
*dr
= &debug_reg_state
;
204 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
205 GetThreadContext (th
->h
, &th
->context
);
207 th
->context
.Dr0
= dr
->dr_mirror
[0];
208 th
->context
.Dr1
= dr
->dr_mirror
[1];
209 th
->context
.Dr2
= dr
->dr_mirror
[2];
210 th
->context
.Dr3
= dr
->dr_mirror
[3];
211 /* th->context.Dr6 = dr->dr_status_mirror;
212 FIXME: should we set dr6 also ?? */
213 th
->context
.Dr7
= dr
->dr_control_mirror
;
215 SetThreadContext (th
->h
, &th
->context
);
216 th
->context
.ContextFlags
= 0;
221 i386_single_step (win32_thread_info
*th
)
223 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
228 /* An array of offset mappings into a Win32 Context structure.
229 This is a one-to-one mapping which is indexed by gdb's register
230 numbers. It retrieves an offset into the context structure where
231 the 4 byte register is located.
232 An offset value of -1 indicates that Win32 does not provide this
233 register in it's CONTEXT structure. In this case regptr will return
234 a pointer into a dummy register. */
235 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
236 static const int mappings
[] = {
237 context_offset (Eax
),
238 context_offset (Ecx
),
239 context_offset (Edx
),
240 context_offset (Ebx
),
241 context_offset (Esp
),
242 context_offset (Ebp
),
243 context_offset (Esi
),
244 context_offset (Edi
),
245 context_offset (Eip
),
246 context_offset (EFlags
),
247 context_offset (SegCs
),
248 context_offset (SegSs
),
249 context_offset (SegDs
),
250 context_offset (SegEs
),
251 context_offset (SegFs
),
252 context_offset (SegGs
),
253 context_offset (FloatSave
.RegisterArea
[0 * 10]),
254 context_offset (FloatSave
.RegisterArea
[1 * 10]),
255 context_offset (FloatSave
.RegisterArea
[2 * 10]),
256 context_offset (FloatSave
.RegisterArea
[3 * 10]),
257 context_offset (FloatSave
.RegisterArea
[4 * 10]),
258 context_offset (FloatSave
.RegisterArea
[5 * 10]),
259 context_offset (FloatSave
.RegisterArea
[6 * 10]),
260 context_offset (FloatSave
.RegisterArea
[7 * 10]),
261 context_offset (FloatSave
.ControlWord
),
262 context_offset (FloatSave
.StatusWord
),
263 context_offset (FloatSave
.TagWord
),
264 context_offset (FloatSave
.ErrorSelector
),
265 context_offset (FloatSave
.ErrorOffset
),
266 context_offset (FloatSave
.DataSelector
),
267 context_offset (FloatSave
.DataOffset
),
268 context_offset (FloatSave
.ErrorSelector
),
270 context_offset (ExtendedRegisters
[10 * 16]),
271 context_offset (ExtendedRegisters
[11 * 16]),
272 context_offset (ExtendedRegisters
[12 * 16]),
273 context_offset (ExtendedRegisters
[13 * 16]),
274 context_offset (ExtendedRegisters
[14 * 16]),
275 context_offset (ExtendedRegisters
[15 * 16]),
276 context_offset (ExtendedRegisters
[16 * 16]),
277 context_offset (ExtendedRegisters
[17 * 16]),
279 context_offset (ExtendedRegisters
[24])
281 #undef context_offset
283 #else /* __x86_64__ */
285 #define context_offset(x) (offsetof (CONTEXT, x))
286 static const int mappings
[] =
288 context_offset (Rax
),
289 context_offset (Rbx
),
290 context_offset (Rcx
),
291 context_offset (Rdx
),
292 context_offset (Rsi
),
293 context_offset (Rdi
),
294 context_offset (Rbp
),
295 context_offset (Rsp
),
298 context_offset (R10
),
299 context_offset (R11
),
300 context_offset (R12
),
301 context_offset (R13
),
302 context_offset (R14
),
303 context_offset (R15
),
304 context_offset (Rip
),
305 context_offset (EFlags
),
306 context_offset (SegCs
),
307 context_offset (SegSs
),
308 context_offset (SegDs
),
309 context_offset (SegEs
),
310 context_offset (SegFs
),
311 context_offset (SegGs
),
312 context_offset (FloatSave
.FloatRegisters
[0]),
313 context_offset (FloatSave
.FloatRegisters
[1]),
314 context_offset (FloatSave
.FloatRegisters
[2]),
315 context_offset (FloatSave
.FloatRegisters
[3]),
316 context_offset (FloatSave
.FloatRegisters
[4]),
317 context_offset (FloatSave
.FloatRegisters
[5]),
318 context_offset (FloatSave
.FloatRegisters
[6]),
319 context_offset (FloatSave
.FloatRegisters
[7]),
320 context_offset (FloatSave
.ControlWord
),
321 context_offset (FloatSave
.StatusWord
),
322 context_offset (FloatSave
.TagWord
),
323 context_offset (FloatSave
.ErrorSelector
),
324 context_offset (FloatSave
.ErrorOffset
),
325 context_offset (FloatSave
.DataSelector
),
326 context_offset (FloatSave
.DataOffset
),
327 context_offset (FloatSave
.ErrorSelector
)
329 context_offset (Xmm0
),
330 context_offset (Xmm1
),
331 context_offset (Xmm2
),
332 context_offset (Xmm3
),
333 context_offset (Xmm4
),
334 context_offset (Xmm5
),
335 context_offset (Xmm6
),
336 context_offset (Xmm7
),
337 context_offset (Xmm8
),
338 context_offset (Xmm9
),
339 context_offset (Xmm10
),
340 context_offset (Xmm11
),
341 context_offset (Xmm12
),
342 context_offset (Xmm13
),
343 context_offset (Xmm14
),
344 context_offset (Xmm15
),
346 context_offset (FloatSave
.MxCsr
)
348 #undef context_offset
350 #endif /* __x86_64__ */
352 /* Fetch register from gdbserver regcache data. */
354 i386_fetch_inferior_register (struct regcache
*regcache
,
355 win32_thread_info
*th
, int r
)
357 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
362 l
= *((long *) context_offset
) & 0xffff;
363 supply_register (regcache
, r
, (char *) &l
);
365 else if (r
== FOP_REGNUM
)
367 l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
368 supply_register (regcache
, r
, (char *) &l
);
371 supply_register (regcache
, r
, context_offset
);
374 /* Store a new register value into the thread context of TH. */
376 i386_store_inferior_register (struct regcache
*regcache
,
377 win32_thread_info
*th
, int r
)
379 char *context_offset
= (char *) &th
->context
+ mappings
[r
];
380 collect_register (regcache
, r
, context_offset
);
383 static const unsigned char i386_win32_breakpoint
= 0xcc;
384 #define i386_win32_breakpoint_len 1
387 init_windows_x86 (void)
390 init_registers_amd64 ();
392 init_registers_i386 ();
396 struct win32_target_ops the_low_target
= {
398 sizeof (mappings
) / sizeof (mappings
[0]),
400 i386_get_thread_context
,
401 i386_set_thread_context
,
403 i386_fetch_inferior_register
,
404 i386_store_inferior_register
,
406 &i386_win32_breakpoint
,
407 i386_win32_breakpoint_len
,
410 i386_stopped_by_watchpoint
,
411 i386_stopped_data_address