1 /* Copyright (C) 2007-2017 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 build-time file gdb/gdbserver/amd64.c. */
33 void init_registers_amd64 (void);
34 extern const struct target_desc *tdesc_amd64;
36 /* Defined in auto-generated build-time file gdb/gdbserver/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 = (win32_thread_info *) 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)
93 = (win32_thread_info *) inferior_target_data (current_thread);
95 win32_require_context (th);
99 return th->context.Dr ## DR
113 gdb_assert_not_reached ("unhandled dr");
117 x86_dr_low_get_addr (int regnum)
119 gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
121 return win32_get_current_dr (regnum - DR_FIRSTADDR);
125 x86_dr_low_get_control (void)
127 return win32_get_current_dr (7);
130 /* Get the value of the DR6 debug status register from the inferior
131 and record it in STATE. */
134 x86_dr_low_get_status (void)
136 return win32_get_current_dr (6);
139 /* Low-level function vector. */
140 struct x86_dr_low_type x86_dr_low =
142 x86_dr_low_set_control,
145 x86_dr_low_get_status,
146 x86_dr_low_get_control,
150 /* Breakpoint/watchpoint support. */
153 i386_supports_z_point_type (char z_type)
157 case Z_PACKET_WRITE_WP:
158 case Z_PACKET_ACCESS_WP:
166 i386_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
167 int size, struct raw_breakpoint *bp)
171 case raw_bkpt_type_write_wp:
172 case raw_bkpt_type_access_wp:
174 enum target_hw_bp_type hw_type
175 = raw_bkpt_type_to_target_hw_bp_type (type);
177 return x86_dr_insert_watchpoint (&debug_reg_state,
178 hw_type, addr, size);
187 i386_remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
188 int size, struct raw_breakpoint *bp)
192 case raw_bkpt_type_write_wp:
193 case raw_bkpt_type_access_wp:
195 enum target_hw_bp_type hw_type
196 = raw_bkpt_type_to_target_hw_bp_type (type);
198 return x86_dr_remove_watchpoint (&debug_reg_state,
199 hw_type, addr, size);
208 x86_stopped_by_watchpoint (void)
210 return x86_dr_stopped_by_watchpoint (&debug_reg_state);
214 x86_stopped_data_address (void)
217 if (x86_dr_stopped_data_address (&debug_reg_state, &addr))
223 i386_initial_stuff (void)
225 x86_low_init_dregs (&debug_reg_state);
229 i386_get_thread_context (win32_thread_info *th)
231 /* Requesting the CONTEXT_EXTENDED_REGISTERS register set fails if
232 the system doesn't support extended registers. */
233 static DWORD extended_registers = CONTEXT_EXTENDED_REGISTERS;
236 th->context.ContextFlags = (CONTEXT_FULL
237 | CONTEXT_FLOATING_POINT
238 | CONTEXT_DEBUG_REGISTERS
239 | extended_registers);
241 if (!GetThreadContext (th->h, &th->context))
243 DWORD e = GetLastError ();
245 if (extended_registers && e == ERROR_INVALID_PARAMETER)
247 extended_registers = 0;
251 error ("GetThreadContext failure %ld\n", (long) e);
256 i386_prepare_to_resume (win32_thread_info *th)
258 if (th->debug_registers_changed)
260 struct x86_debug_reg_state *dr = &debug_reg_state;
262 win32_require_context (th);
264 th->context.Dr0 = dr->dr_mirror[0];
265 th->context.Dr1 = dr->dr_mirror[1];
266 th->context.Dr2 = dr->dr_mirror[2];
267 th->context.Dr3 = dr->dr_mirror[3];
268 /* th->context.Dr6 = dr->dr_status_mirror;
269 FIXME: should we set dr6 also ?? */
270 th->context.Dr7 = dr->dr_control_mirror;
272 th->debug_registers_changed = 0;
277 i386_thread_added (win32_thread_info *th)
279 th->debug_registers_changed = 1;
283 i386_single_step (win32_thread_info *th)
285 th->context.EFlags |= FLAG_TRACE_BIT;
290 /* An array of offset mappings into a Win32 Context structure.
291 This is a one-to-one mapping which is indexed by gdb's register
292 numbers. It retrieves an offset into the context structure where
293 the 4 byte register is located.
294 An offset value of -1 indicates that Win32 does not provide this
295 register in it's CONTEXT structure. In this case regptr will return
296 a pointer into a dummy register. */
297 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
298 static const int mappings[] = {
299 context_offset (Eax),
300 context_offset (Ecx),
301 context_offset (Edx),
302 context_offset (Ebx),
303 context_offset (Esp),
304 context_offset (Ebp),
305 context_offset (Esi),
306 context_offset (Edi),
307 context_offset (Eip),
308 context_offset (EFlags),
309 context_offset (SegCs),
310 context_offset (SegSs),
311 context_offset (SegDs),
312 context_offset (SegEs),
313 context_offset (SegFs),
314 context_offset (SegGs),
315 context_offset (FloatSave.RegisterArea[0 * 10]),
316 context_offset (FloatSave.RegisterArea[1 * 10]),
317 context_offset (FloatSave.RegisterArea[2 * 10]),
318 context_offset (FloatSave.RegisterArea[3 * 10]),
319 context_offset (FloatSave.RegisterArea[4 * 10]),
320 context_offset (FloatSave.RegisterArea[5 * 10]),
321 context_offset (FloatSave.RegisterArea[6 * 10]),
322 context_offset (FloatSave.RegisterArea[7 * 10]),
323 context_offset (FloatSave.ControlWord),
324 context_offset (FloatSave.StatusWord),
325 context_offset (FloatSave.TagWord),
326 context_offset (FloatSave.ErrorSelector),
327 context_offset (FloatSave.ErrorOffset),
328 context_offset (FloatSave.DataSelector),
329 context_offset (FloatSave.DataOffset),
330 context_offset (FloatSave.ErrorSelector),
332 context_offset (ExtendedRegisters[10 * 16]),
333 context_offset (ExtendedRegisters[11 * 16]),
334 context_offset (ExtendedRegisters[12 * 16]),
335 context_offset (ExtendedRegisters[13 * 16]),
336 context_offset (ExtendedRegisters[14 * 16]),
337 context_offset (ExtendedRegisters[15 * 16]),
338 context_offset (ExtendedRegisters[16 * 16]),
339 context_offset (ExtendedRegisters[17 * 16]),
341 context_offset (ExtendedRegisters[24])
343 #undef context_offset
345 #else /* __x86_64__ */
347 #define context_offset(x) (offsetof (CONTEXT, x))
348 static const int mappings[] =
350 context_offset (Rax),
351 context_offset (Rbx),
352 context_offset (Rcx),
353 context_offset (Rdx),
354 context_offset (Rsi),
355 context_offset (Rdi),
356 context_offset (Rbp),
357 context_offset (Rsp),
360 context_offset (R10),
361 context_offset (R11),
362 context_offset (R12),
363 context_offset (R13),
364 context_offset (R14),
365 context_offset (R15),
366 context_offset (Rip),
367 context_offset (EFlags),
368 context_offset (SegCs),
369 context_offset (SegSs),
370 context_offset (SegDs),
371 context_offset (SegEs),
372 context_offset (SegFs),
373 context_offset (SegGs),
374 context_offset (FloatSave.FloatRegisters[0]),
375 context_offset (FloatSave.FloatRegisters[1]),
376 context_offset (FloatSave.FloatRegisters[2]),
377 context_offset (FloatSave.FloatRegisters[3]),
378 context_offset (FloatSave.FloatRegisters[4]),
379 context_offset (FloatSave.FloatRegisters[5]),
380 context_offset (FloatSave.FloatRegisters[6]),
381 context_offset (FloatSave.FloatRegisters[7]),
382 context_offset (FloatSave.ControlWord),
383 context_offset (FloatSave.StatusWord),
384 context_offset (FloatSave.TagWord),
385 context_offset (FloatSave.ErrorSelector),
386 context_offset (FloatSave.ErrorOffset),
387 context_offset (FloatSave.DataSelector),
388 context_offset (FloatSave.DataOffset),
389 context_offset (FloatSave.ErrorSelector)
391 context_offset (Xmm0),
392 context_offset (Xmm1),
393 context_offset (Xmm2),
394 context_offset (Xmm3),
395 context_offset (Xmm4),
396 context_offset (Xmm5),
397 context_offset (Xmm6),
398 context_offset (Xmm7),
399 context_offset (Xmm8),
400 context_offset (Xmm9),
401 context_offset (Xmm10),
402 context_offset (Xmm11),
403 context_offset (Xmm12),
404 context_offset (Xmm13),
405 context_offset (Xmm14),
406 context_offset (Xmm15),
408 context_offset (FloatSave.MxCsr)
410 #undef context_offset
412 #endif /* __x86_64__ */
414 /* Fetch register from gdbserver regcache data. */
416 i386_fetch_inferior_register (struct regcache *regcache,
417 win32_thread_info *th, int r)
419 char *context_offset = (char *) &th->context + mappings[r];
424 l = *((long *) context_offset) & 0xffff;
425 supply_register (regcache, r, (char *) &l);
427 else if (r == FOP_REGNUM)
429 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
430 supply_register (regcache, r, (char *) &l);
433 supply_register (regcache, r, context_offset);
436 /* Store a new register value into the thread context of TH. */
438 i386_store_inferior_register (struct regcache *regcache,
439 win32_thread_info *th, int r)
441 char *context_offset = (char *) &th->context + mappings[r];
442 collect_register (regcache, r, context_offset);
445 static const unsigned char i386_win32_breakpoint = 0xcc;
446 #define i386_win32_breakpoint_len 1
449 i386_arch_setup (void)
452 init_registers_amd64 ();
453 win32_tdesc = tdesc_amd64;
455 init_registers_i386 ();
456 win32_tdesc = tdesc_i386;
460 struct win32_target_ops the_low_target = {
462 sizeof (mappings) / sizeof (mappings[0]),
464 i386_get_thread_context,
465 i386_prepare_to_resume,
467 i386_fetch_inferior_register,
468 i386_store_inferior_register,
470 &i386_win32_breakpoint,
471 i386_win32_breakpoint_len,
472 i386_supports_z_point_type,
475 x86_stopped_by_watchpoint,
476 x86_stopped_data_address