| 1 |
330 |
jeremybenn |
/* Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
|
| 2 |
|
|
|
| 3 |
|
|
This file is part of GDB.
|
| 4 |
|
|
|
| 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.
|
| 9 |
|
|
|
| 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.
|
| 14 |
|
|
|
| 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/>. */
|
| 17 |
|
|
|
| 18 |
|
|
#include "server.h"
|
| 19 |
|
|
#include "win32-low.h"
|
| 20 |
|
|
#include "i386-low.h"
|
| 21 |
|
|
|
| 22 |
|
|
#ifndef CONTEXT_EXTENDED_REGISTERS
|
| 23 |
|
|
#define CONTEXT_EXTENDED_REGISTERS 0
|
| 24 |
|
|
#endif
|
| 25 |
|
|
|
| 26 |
|
|
#define FCS_REGNUM 27
|
| 27 |
|
|
#define FOP_REGNUM 31
|
| 28 |
|
|
|
| 29 |
|
|
#define FLAG_TRACE_BIT 0x100
|
| 30 |
|
|
|
| 31 |
|
|
#ifdef __x86_64__
|
| 32 |
|
|
/* Defined in auto-generated file reg-amd64.c. */
|
| 33 |
|
|
void init_registers_amd64 (void);
|
| 34 |
|
|
#else
|
| 35 |
|
|
/* Defined in auto-generated file reg-i386.c. */
|
| 36 |
|
|
void init_registers_i386 (void);
|
| 37 |
|
|
#endif
|
| 38 |
|
|
|
| 39 |
|
|
static struct i386_debug_reg_state debug_reg_state;
|
| 40 |
|
|
|
| 41 |
|
|
static int debug_registers_changed = 0;
|
| 42 |
|
|
static int debug_registers_used = 0;
|
| 43 |
|
|
|
| 44 |
|
|
/* Update the inferior's debug register REGNUM from STATE. */
|
| 45 |
|
|
|
| 46 |
|
|
void
|
| 47 |
|
|
i386_dr_low_set_addr (const struct i386_debug_reg_state *state, int regnum)
|
| 48 |
|
|
{
|
| 49 |
|
|
if (! (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR))
|
| 50 |
|
|
fatal ("Invalid debug register %d", regnum);
|
| 51 |
|
|
|
| 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;
|
| 57 |
|
|
}
|
| 58 |
|
|
|
| 59 |
|
|
/* Update the inferior's DR7 debug control register from STATE. */
|
| 60 |
|
|
|
| 61 |
|
|
void
|
| 62 |
|
|
i386_dr_low_set_control (const struct i386_debug_reg_state *state)
|
| 63 |
|
|
{
|
| 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;
|
| 69 |
|
|
}
|
| 70 |
|
|
|
| 71 |
|
|
/* Get the value of the DR6 debug status register from the inferior
|
| 72 |
|
|
and record it in STATE. */
|
| 73 |
|
|
|
| 74 |
|
|
void
|
| 75 |
|
|
i386_dr_low_get_status (struct i386_debug_reg_state *state)
|
| 76 |
|
|
{
|
| 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. */
|
| 79 |
|
|
}
|
| 80 |
|
|
|
| 81 |
|
|
/* Watchpoint support. */
|
| 82 |
|
|
|
| 83 |
|
|
static int
|
| 84 |
|
|
i386_insert_point (char type, CORE_ADDR addr, int len)
|
| 85 |
|
|
{
|
| 86 |
|
|
switch (type)
|
| 87 |
|
|
{
|
| 88 |
|
|
case '2':
|
| 89 |
|
|
case '3':
|
| 90 |
|
|
case '4':
|
| 91 |
|
|
return i386_low_insert_watchpoint (&debug_reg_state,
|
| 92 |
|
|
type, addr, len);
|
| 93 |
|
|
default:
|
| 94 |
|
|
/* Unsupported. */
|
| 95 |
|
|
return 1;
|
| 96 |
|
|
}
|
| 97 |
|
|
}
|
| 98 |
|
|
|
| 99 |
|
|
static int
|
| 100 |
|
|
i386_remove_point (char type, CORE_ADDR addr, int len)
|
| 101 |
|
|
{
|
| 102 |
|
|
switch (type)
|
| 103 |
|
|
{
|
| 104 |
|
|
case '2':
|
| 105 |
|
|
case '3':
|
| 106 |
|
|
case '4':
|
| 107 |
|
|
return i386_low_remove_watchpoint (&debug_reg_state,
|
| 108 |
|
|
type, addr, len);
|
| 109 |
|
|
default:
|
| 110 |
|
|
/* Unsupported. */
|
| 111 |
|
|
return 1;
|
| 112 |
|
|
}
|
| 113 |
|
|
}
|
| 114 |
|
|
|
| 115 |
|
|
static int
|
| 116 |
|
|
i386_stopped_by_watchpoint (void)
|
| 117 |
|
|
{
|
| 118 |
|
|
return i386_low_stopped_by_watchpoint (&debug_reg_state);
|
| 119 |
|
|
}
|
| 120 |
|
|
|
| 121 |
|
|
static CORE_ADDR
|
| 122 |
|
|
i386_stopped_data_address (void)
|
| 123 |
|
|
{
|
| 124 |
|
|
CORE_ADDR addr;
|
| 125 |
|
|
if (i386_low_stopped_data_address (&debug_reg_state, &addr))
|
| 126 |
|
|
return addr;
|
| 127 |
|
|
return 0;
|
| 128 |
|
|
}
|
| 129 |
|
|
|
| 130 |
|
|
static void
|
| 131 |
|
|
i386_initial_stuff (void)
|
| 132 |
|
|
{
|
| 133 |
|
|
i386_low_init_dregs (&debug_reg_state);
|
| 134 |
|
|
debug_registers_changed = 0;
|
| 135 |
|
|
debug_registers_used = 0;
|
| 136 |
|
|
}
|
| 137 |
|
|
|
| 138 |
|
|
static void
|
| 139 |
|
|
i386_get_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
|
| 140 |
|
|
{
|
| 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;
|
| 144 |
|
|
|
| 145 |
|
|
again:
|
| 146 |
|
|
th->context.ContextFlags = (CONTEXT_FULL
|
| 147 |
|
|
| CONTEXT_FLOATING_POINT
|
| 148 |
|
|
| CONTEXT_DEBUG_REGISTERS
|
| 149 |
|
|
| extended_registers);
|
| 150 |
|
|
|
| 151 |
|
|
if (!GetThreadContext (th->h, &th->context))
|
| 152 |
|
|
{
|
| 153 |
|
|
DWORD e = GetLastError ();
|
| 154 |
|
|
|
| 155 |
|
|
if (extended_registers && e == ERROR_INVALID_PARAMETER)
|
| 156 |
|
|
{
|
| 157 |
|
|
extended_registers = 0;
|
| 158 |
|
|
goto again;
|
| 159 |
|
|
}
|
| 160 |
|
|
|
| 161 |
|
|
error ("GetThreadContext failure %ld\n", (long) e);
|
| 162 |
|
|
}
|
| 163 |
|
|
|
| 164 |
|
|
debug_registers_changed = 0;
|
| 165 |
|
|
|
| 166 |
|
|
if (th->tid == current_event->dwThreadId)
|
| 167 |
|
|
{
|
| 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;
|
| 176 |
|
|
}
|
| 177 |
|
|
}
|
| 178 |
|
|
|
| 179 |
|
|
static void
|
| 180 |
|
|
i386_set_thread_context (win32_thread_info *th, DEBUG_EVENT* current_event)
|
| 181 |
|
|
{
|
| 182 |
|
|
if (debug_registers_changed)
|
| 183 |
|
|
{
|
| 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;
|
| 192 |
|
|
}
|
| 193 |
|
|
|
| 194 |
|
|
SetThreadContext (th->h, &th->context);
|
| 195 |
|
|
}
|
| 196 |
|
|
|
| 197 |
|
|
static void
|
| 198 |
|
|
i386_thread_added (win32_thread_info *th)
|
| 199 |
|
|
{
|
| 200 |
|
|
/* Set the debug registers for the new thread if they are used. */
|
| 201 |
|
|
if (debug_registers_used)
|
| 202 |
|
|
{
|
| 203 |
|
|
struct i386_debug_reg_state *dr = &debug_reg_state;
|
| 204 |
|
|
th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
|
| 205 |
|
|
GetThreadContext (th->h, &th->context);
|
| 206 |
|
|
|
| 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;
|
| 214 |
|
|
|
| 215 |
|
|
SetThreadContext (th->h, &th->context);
|
| 216 |
|
|
th->context.ContextFlags = 0;
|
| 217 |
|
|
}
|
| 218 |
|
|
}
|
| 219 |
|
|
|
| 220 |
|
|
static void
|
| 221 |
|
|
i386_single_step (win32_thread_info *th)
|
| 222 |
|
|
{
|
| 223 |
|
|
th->context.EFlags |= FLAG_TRACE_BIT;
|
| 224 |
|
|
}
|
| 225 |
|
|
|
| 226 |
|
|
#ifndef __x86_64__
|
| 227 |
|
|
|
| 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),
|
| 269 |
|
|
/* XMM0-7 */
|
| 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]),
|
| 278 |
|
|
/* MXCSR */
|
| 279 |
|
|
context_offset (ExtendedRegisters[24])
|
| 280 |
|
|
};
|
| 281 |
|
|
#undef context_offset
|
| 282 |
|
|
|
| 283 |
|
|
#else /* __x86_64__ */
|
| 284 |
|
|
|
| 285 |
|
|
#define context_offset(x) (offsetof (CONTEXT, x))
|
| 286 |
|
|
static const int mappings[] =
|
| 287 |
|
|
{
|
| 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),
|
| 296 |
|
|
context_offset (R8),
|
| 297 |
|
|
context_offset (R9),
|
| 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)
|
| 328 |
|
|
/* XMM0-7 */ ,
|
| 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),
|
| 345 |
|
|
/* MXCSR */
|
| 346 |
|
|
context_offset (FloatSave.MxCsr)
|
| 347 |
|
|
};
|
| 348 |
|
|
#undef context_offset
|
| 349 |
|
|
|
| 350 |
|
|
#endif /* __x86_64__ */
|
| 351 |
|
|
|
| 352 |
|
|
/* Fetch register from gdbserver regcache data. */
|
| 353 |
|
|
static void
|
| 354 |
|
|
i386_fetch_inferior_register (struct regcache *regcache,
|
| 355 |
|
|
win32_thread_info *th, int r)
|
| 356 |
|
|
{
|
| 357 |
|
|
char *context_offset = (char *) &th->context + mappings[r];
|
| 358 |
|
|
|
| 359 |
|
|
long l;
|
| 360 |
|
|
if (r == FCS_REGNUM)
|
| 361 |
|
|
{
|
| 362 |
|
|
l = *((long *) context_offset) & 0xffff;
|
| 363 |
|
|
supply_register (regcache, r, (char *) &l);
|
| 364 |
|
|
}
|
| 365 |
|
|
else if (r == FOP_REGNUM)
|
| 366 |
|
|
{
|
| 367 |
|
|
l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
|
| 368 |
|
|
supply_register (regcache, r, (char *) &l);
|
| 369 |
|
|
}
|
| 370 |
|
|
else
|
| 371 |
|
|
supply_register (regcache, r, context_offset);
|
| 372 |
|
|
}
|
| 373 |
|
|
|
| 374 |
|
|
/* Store a new register value into the thread context of TH. */
|
| 375 |
|
|
static void
|
| 376 |
|
|
i386_store_inferior_register (struct regcache *regcache,
|
| 377 |
|
|
win32_thread_info *th, int r)
|
| 378 |
|
|
{
|
| 379 |
|
|
char *context_offset = (char *) &th->context + mappings[r];
|
| 380 |
|
|
collect_register (regcache, r, context_offset);
|
| 381 |
|
|
}
|
| 382 |
|
|
|
| 383 |
|
|
static const unsigned char i386_win32_breakpoint = 0xcc;
|
| 384 |
|
|
#define i386_win32_breakpoint_len 1
|
| 385 |
|
|
|
| 386 |
|
|
static void
|
| 387 |
|
|
init_windows_x86 (void)
|
| 388 |
|
|
{
|
| 389 |
|
|
#ifdef __x86_64__
|
| 390 |
|
|
init_registers_amd64 ();
|
| 391 |
|
|
#else
|
| 392 |
|
|
init_registers_i386 ();
|
| 393 |
|
|
#endif
|
| 394 |
|
|
}
|
| 395 |
|
|
|
| 396 |
|
|
struct win32_target_ops the_low_target = {
|
| 397 |
|
|
init_windows_x86,
|
| 398 |
|
|
sizeof (mappings) / sizeof (mappings[0]),
|
| 399 |
|
|
i386_initial_stuff,
|
| 400 |
|
|
i386_get_thread_context,
|
| 401 |
|
|
i386_set_thread_context,
|
| 402 |
|
|
i386_thread_added,
|
| 403 |
|
|
i386_fetch_inferior_register,
|
| 404 |
|
|
i386_store_inferior_register,
|
| 405 |
|
|
i386_single_step,
|
| 406 |
|
|
&i386_win32_breakpoint,
|
| 407 |
|
|
i386_win32_breakpoint_len,
|
| 408 |
|
|
i386_insert_point,
|
| 409 |
|
|
i386_remove_point,
|
| 410 |
|
|
i386_stopped_by_watchpoint,
|
| 411 |
|
|
i386_stopped_data_address
|
| 412 |
|
|
};
|
