gdb/i386m3-nat.c

   1 // OBSOLETE /* Low level interface to I386 running mach 3.0.
   2 // OBSOLETE    Copyright 1992, 1993, 1994, 1996, 2000, 2001
   3 // OBSOLETE    Free Software Foundation, Inc.
   4 // OBSOLETE
   5 // OBSOLETE    This file is part of GDB.
   6 // OBSOLETE
   7 // OBSOLETE    This program is free software; you can redistribute it and/or modify
   8 // OBSOLETE    it under the terms of the GNU General Public License as published by
   9 // OBSOLETE    the Free Software Foundation; either version 2 of the License, or
  10 // OBSOLETE    (at your option) any later version.
  11 // OBSOLETE
  12 // OBSOLETE    This program is distributed in the hope that it will be useful,
  13 // OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // OBSOLETE    GNU General Public License for more details.
  16 // OBSOLETE
  17 // OBSOLETE    You should have received a copy of the GNU General Public License
  18 // OBSOLETE    along with this program; if not, write to the Free Software
  19 // OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330,
  20 // OBSOLETE    Boston, MA 02111-1307, USA.  */
  21 // OBSOLETE
  22 // OBSOLETE #include "defs.h"
  23 // OBSOLETE #include "inferior.h"
  24 // OBSOLETE #include "floatformat.h"
  25 // OBSOLETE #include "regcache.h"
  26 // OBSOLETE
  27 // OBSOLETE #include <stdio.h>
  28 // OBSOLETE
  29 // OBSOLETE #include <mach.h>
  30 // OBSOLETE #include <mach/message.h>
  31 // OBSOLETE #include <mach/exception.h>
  32 // OBSOLETE #include <mach_error.h>
  33 // OBSOLETE
  34 // OBSOLETE /* Hmmm... Should this not be here?
  35 // OBSOLETE  * Now for i386_float_info() target_has_execution
  36 // OBSOLETE  */
  37 // OBSOLETE #include <target.h>
  38 // OBSOLETE
  39 // OBSOLETE /* This mess is duplicated in bfd/i386mach3.h
  40 // OBSOLETE
  41 // OBSOLETE  * This is an ugly way to hack around the incorrect
  42 // OBSOLETE  * definition of UPAGES in i386/machparam.h.
  43 // OBSOLETE  *
  44 // OBSOLETE  * The definition should specify the size reserved
  45 // OBSOLETE  * for "struct user" in core files in PAGES,
  46 // OBSOLETE  * but instead it gives it in 512-byte core-clicks
  47 // OBSOLETE  * for i386 and i860.
  48 // OBSOLETE  */
  49 // OBSOLETE #include <sys/param.h>
  50 // OBSOLETE #if UPAGES == 16
  51 // OBSOLETE #define UAREA_SIZE ctob(UPAGES)
  52 // OBSOLETE #elif UPAGES == 2
  53 // OBSOLETE #define UAREA_SIZE (NBPG*UPAGES)
  54 // OBSOLETE #else
  55 // OBSOLETE FIXME ! !UPAGES is neither 2 nor 16
  56 // OBSOLETE #endif
  57 // OBSOLETE
  58 // OBSOLETE /* @@@ Should move print_387_status() to i387-tdep.c */
  59 // OBSOLETE extern void print_387_control_word ();              /* i387-tdep.h */
  60 // OBSOLETE extern void print_387_status_word ();
  61 // OBSOLETE
  62 // OBSOLETE #define private static
  63 // OBSOLETE \f
  64 // OBSOLETE
  65 // OBSOLETE /* Find offsets to thread states at compile time.
  66 // OBSOLETE  * If your compiler does not grok this, calculate offsets
  67 // OBSOLETE  * offsets yourself and use them (or get a compatible compiler :-)
  68 // OBSOLETE  */
  69 // OBSOLETE
  70 // OBSOLETE #define  REG_OFFSET(reg) (int)(&((struct i386_thread_state *)0)->reg)
  71 // OBSOLETE
  72 // OBSOLETE /* at reg_offset[i] is the offset to the i386_thread_state
  73 // OBSOLETE  * location where the gdb registers[i] is stored.
  74 // OBSOLETE  */
  75 // OBSOLETE
  76 // OBSOLETE static int reg_offset[] =
  77 // OBSOLETE {
  78 // OBSOLETE   REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
  79 // OBSOLETE   REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi),
  80 // OBSOLETE   REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss),
  81 // OBSOLETE   REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
  82 // OBSOLETE };
  83 // OBSOLETE
  84 // OBSOLETE #define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
  85 // OBSOLETE
  86 // OBSOLETE /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
  87 // OBSOLETE  * Caller knows that the regs handled in one transaction are of same size.
  88 // OBSOLETE  */
  89 // OBSOLETE #define FETCH_REGS(state, regnum, count) \
  90 // OBSOLETE   memcpy (&registers[REGISTER_BYTE (regnum)], \
  91 // OBSOLETE       REG_ADDRESS (state, regnum), \
  92 // OBSOLETE       count*REGISTER_SIZE)
  93 // OBSOLETE
  94 // OBSOLETE /* Store COUNT contiguous registers to thread STATE starting from REGNUM */
  95 // OBSOLETE #define STORE_REGS(state, regnum, count) \
  96 // OBSOLETE   memcpy (REG_ADDRESS (state, regnum), \
  97 // OBSOLETE       &registers[REGISTER_BYTE (regnum)], \
  98 // OBSOLETE       count*REGISTER_SIZE)
  99 // OBSOLETE \f
 100 // OBSOLETE /*
 101 // OBSOLETE  * Fetch inferiors registers for gdb.
 102 // OBSOLETE  * REGNO specifies which (as gdb views it) register, -1 for all.
 103 // OBSOLETE  */
 104 // OBSOLETE
 105 // OBSOLETE void
 106 // OBSOLETE fetch_inferior_registers (int regno)
 107 // OBSOLETE {
 108 // OBSOLETE   kern_return_t ret;
 109 // OBSOLETE   thread_state_data_t state;
 110 // OBSOLETE   unsigned int stateCnt = i386_THREAD_STATE_COUNT;
 111 // OBSOLETE   int index;
 112 // OBSOLETE
 113 // OBSOLETE   if (!MACH_PORT_VALID (current_thread))
 114 // OBSOLETE     error ("fetch inferior registers: Invalid thread");
 115 // OBSOLETE
 116 // OBSOLETE   if (must_suspend_thread)
 117 // OBSOLETE     setup_thread (current_thread, 1);
 118 // OBSOLETE
 119 // OBSOLETE   ret = thread_get_state (current_thread,
 120 // OBSOLETE                       i386_THREAD_STATE,
 121 // OBSOLETE                       state,
 122 // OBSOLETE                       &stateCnt);
 123 // OBSOLETE
 124 // OBSOLETE   if (ret != KERN_SUCCESS)
 125 // OBSOLETE     warning ("fetch_inferior_registers: %s ",
 126 // OBSOLETE          mach_error_string (ret));
 127 // OBSOLETE #if 0
 128 // OBSOLETE   /* It may be more effective to store validate all of them,
 129 // OBSOLETE    * since we fetched them all anyway
 130 // OBSOLETE    */
 131 // OBSOLETE   else if (regno != -1)
 132 // OBSOLETE     supply_register (regno, (char *) state + reg_offset[regno]);
 133 // OBSOLETE #endif
 134 // OBSOLETE   else
 135 // OBSOLETE     {
 136 // OBSOLETE       for (index = 0; index < NUM_REGS; index++)
 137 // OBSOLETE     supply_register (index, (char *) state + reg_offset[index]);
 138 // OBSOLETE     }
 139 // OBSOLETE
 140 // OBSOLETE   if (must_suspend_thread)
 141 // OBSOLETE     setup_thread (current_thread, 0);
 142 // OBSOLETE }
 143 // OBSOLETE \f
 144 // OBSOLETE /* Store our register values back into the inferior.
 145 // OBSOLETE  * If REGNO is -1, do this for all registers.
 146 // OBSOLETE  * Otherwise, REGNO specifies which register
 147 // OBSOLETE  *
 148 // OBSOLETE  * On mach3 all registers are always saved in one call.
 149 // OBSOLETE  */
 150 // OBSOLETE void
 151 // OBSOLETE store_inferior_registers (int regno)
 152 // OBSOLETE {
 153 // OBSOLETE   kern_return_t ret;
 154 // OBSOLETE   thread_state_data_t state;
 155 // OBSOLETE   unsigned int stateCnt = i386_THREAD_STATE_COUNT;
 156 // OBSOLETE   register int index;
 157 // OBSOLETE
 158 // OBSOLETE   if (!MACH_PORT_VALID (current_thread))
 159 // OBSOLETE     error ("store inferior registers: Invalid thread");
 160 // OBSOLETE
 161 // OBSOLETE   if (must_suspend_thread)
 162 // OBSOLETE     setup_thread (current_thread, 1);
 163 // OBSOLETE
 164 // OBSOLETE   /* Fetch the state of the current thread */
 165 // OBSOLETE   ret = thread_get_state (current_thread,
 166 // OBSOLETE                       i386_THREAD_STATE,
 167 // OBSOLETE                       state,
 168 // OBSOLETE                       &stateCnt);
 169 // OBSOLETE
 170 // OBSOLETE   if (ret != KERN_SUCCESS)
 171 // OBSOLETE     {
 172 // OBSOLETE       warning ("store_inferior_registers (get): %s",
 173 // OBSOLETE            mach_error_string (ret));
 174 // OBSOLETE       if (must_suspend_thread)
 175 // OBSOLETE     setup_thread (current_thread, 0);
 176 // OBSOLETE       return;
 177 // OBSOLETE     }
 178 // OBSOLETE
 179 // OBSOLETE   /* move gdb's registers to thread's state
 180 // OBSOLETE
 181 // OBSOLETE    * Since we save all registers anyway, save the ones
 182 // OBSOLETE    * that gdb thinks are valid (e.g. ignore the regno
 183 // OBSOLETE    * parameter)
 184 // OBSOLETE    */
 185 // OBSOLETE #if 0
 186 // OBSOLETE   if (regno != -1)
 187 // OBSOLETE     STORE_REGS (state, regno, 1);
 188 // OBSOLETE   else
 189 // OBSOLETE #endif
 190 // OBSOLETE     {
 191 // OBSOLETE       for (index = 0; index < NUM_REGS; index++)
 192 // OBSOLETE     STORE_REGS (state, index, 1);
 193 // OBSOLETE     }
 194 // OBSOLETE
 195 // OBSOLETE   /* Write gdb's current view of register to the thread
 196 // OBSOLETE    */
 197 // OBSOLETE   ret = thread_set_state (current_thread,
 198 // OBSOLETE                       i386_THREAD_STATE,
 199 // OBSOLETE                       state,
 200 // OBSOLETE                       i386_THREAD_STATE_COUNT);
 201 // OBSOLETE
 202 // OBSOLETE   if (ret != KERN_SUCCESS)
 203 // OBSOLETE     warning ("store_inferior_registers (set): %s",
 204 // OBSOLETE          mach_error_string (ret));
 205 // OBSOLETE
 206 // OBSOLETE   if (must_suspend_thread)
 207 // OBSOLETE     setup_thread (current_thread, 0);
 208 // OBSOLETE }
 209 // OBSOLETE \f
 210 // OBSOLETE
 211 // OBSOLETE
 212 // OBSOLETE /* Return the address in the core dump or inferior of register REGNO.
 213 // OBSOLETE  * BLOCKEND should be the address of the end of the UPAGES area read
 214 // OBSOLETE  * in memory, but it's not?
 215 // OBSOLETE  *
 216 // OBSOLETE  * Currently our UX server dumps the whole thread state to the
 217 // OBSOLETE  * core file. If your UX does something else, adapt the routine
 218 // OBSOLETE  * below to return the offset to the given register.
 219 // OBSOLETE  *
 220 // OBSOLETE  * Called by core-aout.c(fetch_core_registers)
 221 // OBSOLETE  */
 222 // OBSOLETE
 223 // OBSOLETE CORE_ADDR
 224 // OBSOLETE register_addr (int regno, CORE_ADDR blockend)
 225 // OBSOLETE {
 226 // OBSOLETE   CORE_ADDR addr;
 227 // OBSOLETE
 228 // OBSOLETE   if (regno < 0 || regno >= NUM_REGS)
 229 // OBSOLETE     error ("Invalid register number %d.", regno);
 230 // OBSOLETE
 231 // OBSOLETE   /* UAREA_SIZE == 8 kB in i386 */
 232 // OBSOLETE   addr = (unsigned int) REG_ADDRESS (UAREA_SIZE - sizeof (struct i386_thread_state), regno);
 233 // OBSOLETE
 234 // OBSOLETE   return addr;
 235 // OBSOLETE }
 236 // OBSOLETE
 237 // OBSOLETE /* jtv@hut.fi: I copied and modified this 387 code from
 238 // OBSOLETE  * gdb/i386-xdep.c. Modifications for Mach 3.0.
 239 // OBSOLETE  *
 240 // OBSOLETE  * i387 status dumper. See also i387-tdep.c
 241 // OBSOLETE  */
 242 // OBSOLETE struct env387
 243 // OBSOLETE {
 244 // OBSOLETE   unsigned short control;
 245 // OBSOLETE   unsigned short r0;
 246 // OBSOLETE   unsigned short status;
 247 // OBSOLETE   unsigned short r1;
 248 // OBSOLETE   unsigned short tag;
 249 // OBSOLETE   unsigned short r2;
 250 // OBSOLETE   unsigned long eip;
 251 // OBSOLETE   unsigned short code_seg;
 252 // OBSOLETE   unsigned short opcode;
 253 // OBSOLETE   unsigned long operand;
 254 // OBSOLETE   unsigned short operand_seg;
 255 // OBSOLETE   unsigned short r3;
 256 // OBSOLETE   unsigned char regs[8][10];
 257 // OBSOLETE };
 258 // OBSOLETE /* This routine is machine independent?
 259 // OBSOLETE  * Should move it to i387-tdep.c but you need to export struct env387
 260 // OBSOLETE  */
 261 // OBSOLETE private
 262 // OBSOLETE print_387_status (unsigned short status, struct env387 *ep)
 263 // OBSOLETE {
 264 // OBSOLETE   int i;
 265 // OBSOLETE   int bothstatus;
 266 // OBSOLETE   int top;
 267 // OBSOLETE   int fpreg;
 268 // OBSOLETE   unsigned char *p;
 269 // OBSOLETE
 270 // OBSOLETE   bothstatus = ((status != 0) && (ep->status != 0));
 271 // OBSOLETE   if (status != 0)
 272 // OBSOLETE     {
 273 // OBSOLETE       if (bothstatus)
 274 // OBSOLETE     printf_unfiltered ("u: ");
 275 // OBSOLETE       print_387_status_word (status);
 276 // OBSOLETE     }
 277 // OBSOLETE
 278 // OBSOLETE   if (ep->status != 0)
 279 // OBSOLETE     {
 280 // OBSOLETE       if (bothstatus)
 281 // OBSOLETE     printf_unfiltered ("e: ");
 282 // OBSOLETE       print_387_status_word (ep->status);
 283 // OBSOLETE     }
 284 // OBSOLETE
 285 // OBSOLETE   print_387_control_word (ep->control);
 286 // OBSOLETE   printf_unfiltered ("last exception: ");
 287 // OBSOLETE   printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
 288 // OBSOLETE   printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
 289 // OBSOLETE   printf_unfiltered ("%s; ", local_hex_string (ep->eip));
 290 // OBSOLETE   printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
 291 // OBSOLETE   printf_unfiltered (":%s\n", local_hex_string (ep->operand));
 292 // OBSOLETE
 293 // OBSOLETE   top = (ep->status >> 11) & 7;
 294 // OBSOLETE
 295 // OBSOLETE   printf_unfiltered ("regno  tag  msb              lsb  value\n");
 296 // OBSOLETE   for (fpreg = 7; fpreg >= 0; fpreg--)
 297 // OBSOLETE     {
 298 // OBSOLETE       double val;
 299 // OBSOLETE
 300 // OBSOLETE       printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : "  ", fpreg);
 301 // OBSOLETE
 302 // OBSOLETE       switch ((ep->tag >> (fpreg * 2)) & 3)
 303 // OBSOLETE     {
 304 // OBSOLETE     case 0:
 305 // OBSOLETE       printf_unfiltered ("valid ");
 306 // OBSOLETE       break;
 307 // OBSOLETE     case 1:
 308 // OBSOLETE       printf_unfiltered ("zero  ");
 309 // OBSOLETE       break;
 310 // OBSOLETE     case 2:
 311 // OBSOLETE       printf_unfiltered ("trap  ");
 312 // OBSOLETE       break;
 313 // OBSOLETE     case 3:
 314 // OBSOLETE       printf_unfiltered ("empty ");
 315 // OBSOLETE       break;
 316 // OBSOLETE     }
 317 // OBSOLETE       for (i = 9; i >= 0; i--)
 318 // OBSOLETE     printf_unfiltered ("%02x", ep->regs[fpreg][i]);
 319 // OBSOLETE
 320 // OBSOLETE       floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
 321 // OBSOLETE                          &val);
 322 // OBSOLETE       printf_unfiltered ("  %g\n", val);
 323 // OBSOLETE     }
 324 // OBSOLETE   if (ep->r0)
 325 // OBSOLETE     printf_unfiltered ("warning: reserved0 is %s\n", local_hex_string (ep->r0));
 326 // OBSOLETE   if (ep->r1)
 327 // OBSOLETE     printf_unfiltered ("warning: reserved1 is %s\n", local_hex_string (ep->r1));
 328 // OBSOLETE   if (ep->r2)
 329 // OBSOLETE     printf_unfiltered ("warning: reserved2 is %s\n", local_hex_string (ep->r2));
 330 // OBSOLETE   if (ep->r3)
 331 // OBSOLETE     printf_unfiltered ("warning: reserved3 is %s\n", local_hex_string (ep->r3));
 332 // OBSOLETE }
 333 // OBSOLETE
 334 // OBSOLETE /*
 335 // OBSOLETE  * values that go into fp_kind (from <i386/fpreg.h>)
 336 // OBSOLETE  */
 337 // OBSOLETE #define FP_NO   0           /* no fp chip, no emulator (no fp support)      */
 338 // OBSOLETE #define FP_SW   1           /* no fp chip, using software emulator          */
 339 // OBSOLETE #define FP_HW   2           /* chip present bit                             */
 340 // OBSOLETE #define FP_287  2           /* 80287 chip present                           */
 341 // OBSOLETE #define FP_387  3           /* 80387 chip present                           */
 342 // OBSOLETE
 343 // OBSOLETE typedef struct fpstate
 344 // OBSOLETE {
 345 // OBSOLETE #if 1
 346 // OBSOLETE   unsigned char state[FP_STATE_BYTES];      /* "hardware" state */
 347 // OBSOLETE #else
 348 // OBSOLETE   struct env387 state;              /* Actually this */
 349 // OBSOLETE #endif
 350 // OBSOLETE   int status;                       /* Duplicate status */
 351 // OBSOLETE }
 352 // OBSOLETE  *fpstate_t;
 353 // OBSOLETE
 354 // OBSOLETE /* Mach 3 specific routines.
 355 // OBSOLETE  */
 356 // OBSOLETE private boolean_t
 357 // OBSOLETE get_i387_state (struct fpstate *fstate)
 358 // OBSOLETE {
 359 // OBSOLETE   kern_return_t ret;
 360 // OBSOLETE   thread_state_data_t state;
 361 // OBSOLETE   unsigned int fsCnt = i386_FLOAT_STATE_COUNT;
 362 // OBSOLETE   struct i386_float_state *fsp;
 363 // OBSOLETE
 364 // OBSOLETE   ret = thread_get_state (current_thread,
 365 // OBSOLETE                       i386_FLOAT_STATE,
 366 // OBSOLETE                       state,
 367 // OBSOLETE                       &fsCnt);
 368 // OBSOLETE
 369 // OBSOLETE   if (ret != KERN_SUCCESS)
 370 // OBSOLETE     {
 371 // OBSOLETE       warning ("Can not get live floating point state: %s",
 372 // OBSOLETE            mach_error_string (ret));
 373 // OBSOLETE       return FALSE;
 374 // OBSOLETE     }
 375 // OBSOLETE
 376 // OBSOLETE   fsp = (struct i386_float_state *) state;
 377 // OBSOLETE   /* The 387 chip (also 486 counts) or a software emulator? */
 378 // OBSOLETE   if (!fsp->initialized || (fsp->fpkind != FP_387 && fsp->fpkind != FP_SW))
 379 // OBSOLETE     return FALSE;
 380 // OBSOLETE
 381 // OBSOLETE   /* Clear the target then copy thread's float state there.
 382 // OBSOLETE      Make a copy of the status word, for some reason?
 383 // OBSOLETE    */
 384 // OBSOLETE   memset (fstate, 0, sizeof (struct fpstate));
 385 // OBSOLETE
 386 // OBSOLETE   fstate->status = fsp->exc_status;
 387 // OBSOLETE
 388 // OBSOLETE   memcpy (fstate->state, (char *) &fsp->hw_state, FP_STATE_BYTES);
 389 // OBSOLETE
 390 // OBSOLETE   return TRUE;
 391 // OBSOLETE }
 392 // OBSOLETE
 393 // OBSOLETE private boolean_t
 394 // OBSOLETE get_i387_core_state (struct fpstate *fstate)
 395 // OBSOLETE {
 396 // OBSOLETE   /* Not implemented yet. Core files do not contain float state. */
 397 // OBSOLETE   return FALSE;
 398 // OBSOLETE }
 399 // OBSOLETE
 400 // OBSOLETE /*
 401 // OBSOLETE  * This is called by "info float" command
 402 // OBSOLETE  */
 403 // OBSOLETE void
 404 // OBSOLETE i386_mach3_float_info (void)
 405 // OBSOLETE {
 406 // OBSOLETE   char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
 407 // OBSOLETE   boolean_t valid = FALSE;
 408 // OBSOLETE   fpstate_t fps;
 409 // OBSOLETE
 410 // OBSOLETE   if (target_has_execution)
 411 // OBSOLETE     valid = get_i387_state (buf);
 412 // OBSOLETE #if 0
 413 // OBSOLETE   else if (WE HAVE CORE FILE)       /* @@@@ Core files not supported */
 414 // OBSOLETE     valid = get_i387_core_state (buf);
 415 // OBSOLETE #endif
 416 // OBSOLETE
 417 // OBSOLETE   if (!valid)
 418 // OBSOLETE     {
 419 // OBSOLETE       warning ("no floating point status saved");
 420 // OBSOLETE       return;
 421 // OBSOLETE     }
 422 // OBSOLETE
 423 // OBSOLETE   fps = (fpstate_t) buf;
 424 // OBSOLETE
 425 // OBSOLETE   print_387_status (fps->status, (struct env387 *) fps->state);
 426 // OBSOLETE }