1 /* Copyright (C) 2007-2015 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);
34 extern const struct target_desc *tdesc_amd64;
36 /* Defined in auto-generated file reg-i386.c. */
37 void init_registers_i386 (void);
38 extern const struct target_desc *tdesc_i386;
41 static struct x86_debug_reg_state debug_reg_state;
44 update_debug_registers_callback (struct inferior_list_entry *entry,
47 struct thread_info *thr = (struct thread_info *) entry;
48 win32_thread_info *th = inferior_target_data (thr);
49 int pid = *(int *) pid_p;
51 /* Only update the threads of this process. */
52 if (pid_of (thr) == pid)
54 /* The actual update is done later just before resuming the lwp,
55 we just mark that the registers need updating. */
56 th->debug_registers_changed = 1;
62 /* Update the inferior's debug register REGNUM from STATE. */
65 x86_dr_low_set_addr (int regnum, CORE_ADDR addr)
67 /* Only update the threads of this process. */
68 int pid = pid_of (current_thread);
70 gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
72 find_inferior (&all_threads, update_debug_registers_callback, &pid);
75 /* Update the inferior's DR7 debug control register from STATE. */
78 x86_dr_low_set_control (unsigned long control)
80 /* Only update the threads of this process. */
81 int pid = pid_of (current_thread);
83 find_inferior (&all_threads, update_debug_registers_callback, &pid);
86 /* Return the current value of a DR register of the current thread's
90 win32_get_current_dr (int dr)
92 win32_thread_info *th = inferior_target_data (current_thread);
94 win32_require_context (th);
98 return th->context.Dr ## DR
112 gdb_assert_not_reached ("unhandled dr");
116 x86_dr_low_get_addr (int regnum)
118 gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
120 return win32_get_current_dr (regnum - DR_FIRSTADDR);
124 x86_dr_low_get_control (void)
126 return win32_get_current_dr (7);
129 /* Get the value of the DR6 debug status register from the inferior
130 and record it in STATE. */
133 x86_dr_low_get_status (void)
135 return win32_get_current_dr (6);
138 /* Low-level function vector. */
139 struct x86_dr_low_type x86_dr_low =
141 x86_dr_low_set_control,
144 x86_dr_low_get_status,
145 x86_dr_low_get_control,
149 /* Breakpoint/watchpoint support. */
152 i386_supports_z_point_type (char z_type)
156 case Z_PACKET_WRITE_WP:
157 case Z_PACKET_ACCESS_WP:
165 i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
166 int size, struct raw_breakpoint *bp)
170 case raw_bkpt_type_write_wp:
171 case raw_bkpt_type_access_wp:
173 enum target_hw_bp_type hw_type
174 = raw_bkpt_type_to_target_hw_bp_type (type);
176 return x86_dr_insert_watchpoint (&debug_reg_state,
177 hw_type, addr, size);
186 i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
187 int size, struct raw_breakpoint *bp)
191 case raw_bkpt_type_write_wp:
192 case raw_bkpt_type_access_wp:
194 enum target_hw_bp_type hw_type
195 = raw_bkpt_type_to_target_hw_bp_type (type);
197 return x86_dr_remove_watchpoint (&debug_reg_state,
198 hw_type, addr, size);
207 x86_stopped_by_watchpoint (void)
209 return x86_dr_stopped_by_watchpoint (&debug_reg_state);
213 x86_stopped_data_address (void)
216 if (x86_dr_stopped_data_address (&debug_reg_state, &addr))
222 i386_initial_stuff (void)
224 x86_low_init_dregs (&debug_reg_state);
228 i386_get_thread_context (win32_thread_info *th)
230 /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
231 the system doesn't support extended registers. */
232 static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;
235 th->context.ContextFlags = (CONTEXT_FULL
236 | CONTEXT_FLOATING_POINT
237 | CONTEXT_DEBUG_REGISTERS
238 | extended_registers);
240 if (!GetThreadContext (th->h, &th->context))
242 DWORD e = GetLastError ();
244 if (extended_registers && e == ERROR_INVALID_PARAMETER)
246 extended_registers = 0;
250 error ("GetThreadContext failure %ld\n", (long) e);
255 i386_prepare_to_resume (win32_thread_info *th)
257 if (th->debug_registers_changed)
259 struct x86_debug_reg_state *dr = &debug_reg_state;
261 win32_require_context (th);
263 th->context.Dr0 = dr->dr_mirror[0];
264 th->context.Dr1 = dr->dr_mirror[1];
265 th->context.Dr2 = dr->dr_mirror[2];
266 th->context.Dr3 = dr->dr_mirror[3];
267 /* th->context.Dr6 = dr->dr_status_mirror;
268 FIXME: should we set dr6 also ?? */
269 th->context.Dr7 = dr->dr_control_mirror;
271 th->debug_registers_changed = 0;
276 i386_thread_added (win32_thread_info *th)
278 th->debug_registers_changed = 1;
282 i386_single_step (win32_thread_info *th)
284 th->context.EFlags |= FLAG_TRACE_BIT;
289 /* An array of offset mappings into a Win32 Context structure.
290 This is a one-to-one mapping which is indexed by gdb's register
291 numbers. It retrieves an offset into the context structure where
292 the 4 byte register is located.
293 An offset value of -1 indicates that Win32 does not provide this
294 register in it's CONTEXT structure. In this case regptr will return
295 a pointer into a dummy register. */
296 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
297 static const int mappings[] = {
298 context_offset (Eax),
299 context_offset (Ecx),
300 context_offset (Edx),
301 context_offset (Ebx),
302 context_offset (Esp),
303 context_offset (Ebp),
304 context_offset (Esi),
305 context_offset (Edi),
306 context_offset (Eip),
307 context_offset (EFlags),
308 context_offset (SegCs),
309 context_offset (SegSs),
310 context_offset (SegDs),
311 context_offset (SegEs),
312 context_offset (SegFs),
313 context_offset (SegGs),
314 context_offset (FloatSave.RegisterArea[0 * 10]),
315 context_offset (FloatSave.RegisterArea[1 * 10]),
316 context_offset (FloatSave.RegisterArea[2 * 10]),
317 context_offset (FloatSave.RegisterArea[3 * 10]),
318 context_offset (FloatSave.RegisterArea[4 * 10]),
319 context_offset (FloatSave.RegisterArea[5 * 10]),
320 context_offset (FloatSave.RegisterArea[6 * 10]),
321 context_offset (FloatSave.RegisterArea[7 * 10]),
322 context_offset (FloatSave.ControlWord),
323 context_offset (FloatSave.StatusWord),
324 context_offset (FloatSave.TagWord),
325 context_offset (FloatSave.ErrorSelector),
326 context_offset (FloatSave.ErrorOffset),
327 context_offset (FloatSave.DataSelector),
328 context_offset (FloatSave.DataOffset),
329 context_offset (FloatSave.ErrorSelector),
331 context_offset (ExtendedRegisters[10 * 16]),
332 context_offset (ExtendedRegisters[11 * 16]),
333 context_offset (ExtendedRegisters[12 * 16]),
334 context_offset (ExtendedRegisters[13 * 16]),
335 context_offset (ExtendedRegisters[14 * 16]),
336 context_offset (ExtendedRegisters[15 * 16]),
337 context_offset (ExtendedRegisters[16 * 16]),
338 context_offset (ExtendedRegisters[17 * 16]),
340 context_offset (ExtendedRegisters[24])
342 #undef context_offset
344 #else /* __x86_64__ */
346 #define context_offset(x) (offsetof (CONTEXT, x))
347 static const int mappings[] =
349 context_offset (Rax),
350 context_offset (Rbx),
351 context_offset (Rcx),
352 context_offset (Rdx),
353 context_offset (Rsi),
354 context_offset (Rdi),
355 context_offset (Rbp),
356 context_offset (Rsp),
359 context_offset (R10),
360 context_offset (R11),
361 context_offset (R12),
362 context_offset (R13),
363 context_offset (R14),
364 context_offset (R15),
365 context_offset (Rip),
366 context_offset (EFlags),
367 context_offset (SegCs),
368 context_offset (SegSs),
369 context_offset (SegDs),
370 context_offset (SegEs),
371 context_offset (SegFs),
372 context_offset (SegGs),
373 context_offset (FloatSave.FloatRegisters[0]),
374 context_offset (FloatSave.FloatRegisters[1]),
375 context_offset (FloatSave.FloatRegisters[2]),
376 context_offset (FloatSave.FloatRegisters[3]),
377 context_offset (FloatSave.FloatRegisters[4]),
378 context_offset (FloatSave.FloatRegisters[5]),
379 context_offset (FloatSave.FloatRegisters[6]),
380 context_offset (FloatSave.FloatRegisters[7]),
381 context_offset (FloatSave.ControlWord),
382 context_offset (FloatSave.StatusWord),
383 context_offset (FloatSave.TagWord),
384 context_offset (FloatSave.ErrorSelector),
385 context_offset (FloatSave.ErrorOffset),
386 context_offset (FloatSave.DataSelector),
387 context_offset (FloatSave.DataOffset),
388 context_offset (FloatSave.ErrorSelector)
390 context_offset (Xmm0),
391 context_offset (Xmm1),
392 context_offset (Xmm2),
393 context_offset (Xmm3),
394 context_offset (Xmm4),
395 context_offset (Xmm5),
396 context_offset (Xmm6),
397 context_offset (Xmm7),
398 context_offset (Xmm8),
399 context_offset (Xmm9),
400 context_offset (Xmm10),
401 context_offset (Xmm11),
402 context_offset (Xmm12),
403 context_offset (Xmm13),
404 context_offset (Xmm14),
405 context_offset (Xmm15),
407 context_offset (FloatSave.MxCsr)
409 #undef context_offset
411 #endif /* __x86_64__ */
413 /* Fetch register from gdbserver regcache data. */
415 i386_fetch_inferior_register (struct regcache *regcache,
416 win32_thread_info *th, int r)
418 char *context_offset = (char *) &th->context + mappings[r];
423 l = *((long *) context_offset) & 0xffff;
424 supply_register (regcache, r, (char *) &l);
426 else if (r == FOP_REGNUM)
428 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
429 supply_register (regcache, r, (char *) &l);
432 supply_register (regcache, r, context_offset);
435 /* Store a new register value into the thread context of TH. */
437 i386_store_inferior_register (struct regcache *regcache,
438 win32_thread_info *th, int r)
440 char *context_offset = (char *) &th->context + mappings[r];
441 collect_register (regcache, r, context_offset);
444 static const unsigned char i386_win32_breakpoint = 0xcc;
445 #define i386_win32_breakpoint_len 1
448 i386_arch_setup (void)
451 init_registers_amd64 ();
452 win32_tdesc = tdesc_amd64;
454 init_registers_i386 ();
455 win32_tdesc = tdesc_i386;
459 struct win32_target_ops the_low_target = {
461 sizeof (mappings) / sizeof (mappings[0]),
463 i386_get_thread_context,
464 i386_prepare_to_resume,
466 i386_fetch_inferior_register,
467 i386_store_inferior_register,
469 &i386_win32_breakpoint,
470 i386_win32_breakpoint_len,
471 i386_supports_z_point_type,
474 x86_stopped_by_watchpoint,
475 x86_stopped_data_address