gdb/mipsm3-nat.c

   1 // OBSOLETE /* Definitions to make GDB run on a mips box under Mach 3.0
   2 // OBSOLETE    Copyright 1992, 1993, 1998, 2000, 2001 Free Software Foundation, Inc.
   3 // OBSOLETE
   4 // OBSOLETE    This file is part of GDB.
   5 // OBSOLETE
   6 // OBSOLETE    This program is free software; you can redistribute it and/or modify
   7 // OBSOLETE    it under the terms of the GNU General Public License as published by
   8 // OBSOLETE    the Free Software Foundation; either version 2 of the License, or
   9 // OBSOLETE    (at your option) any later version.
  10 // OBSOLETE
  11 // OBSOLETE    This program is distributed in the hope that it will be useful,
  12 // OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // OBSOLETE    GNU General Public License for more details.
  15 // OBSOLETE
  16 // OBSOLETE    You should have received a copy of the GNU General Public License
  17 // OBSOLETE    along with this program; if not, write to the Free Software
  18 // OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330,
  19 // OBSOLETE    Boston, MA 02111-1307, USA.  */
  20 // OBSOLETE
  21 // OBSOLETE /* Mach specific routines for little endian mips (e.g. pmax)
  22 // OBSOLETE  * running Mach 3.0
  23 // OBSOLETE  *
  24 // OBSOLETE  * Author: Jukka Virtanen <jtv@hut.fi>
  25 // OBSOLETE  */
  26 // OBSOLETE
  27 // OBSOLETE #include "defs.h"
  28 // OBSOLETE #include "inferior.h"
  29 // OBSOLETE #include "regcache.h"
  30 // OBSOLETE
  31 // OBSOLETE #include <stdio.h>
  32 // OBSOLETE
  33 // OBSOLETE #include <mach.h>
  34 // OBSOLETE #include <mach/message.h>
  35 // OBSOLETE #include <mach/exception.h>
  36 // OBSOLETE #include <mach_error.h>
  37 // OBSOLETE
  38 // OBSOLETE /* Find offsets to thread states at compile time.
  39 // OBSOLETE  * If your compiler does not grok this, check the hand coded
  40 // OBSOLETE  * offsets and use them.
  41 // OBSOLETE  */
  42 // OBSOLETE
  43 // OBSOLETE #if 1
  44 // OBSOLETE
  45 // OBSOLETE #define  REG_OFFSET(reg) (int)(&((struct mips_thread_state *)0)->reg)
  46 // OBSOLETE #define CREG_OFFSET(reg) (int)(&((struct mips_float_state *)0)->reg)
  47 // OBSOLETE #define EREG_OFFSET(reg) (int)(&((struct mips_exc_state *)0)->reg)
  48 // OBSOLETE
  49 // OBSOLETE /* at reg_offset[i] is the offset to the mips_thread_state
  50 // OBSOLETE  * location where the gdb registers[i] is stored.
  51 // OBSOLETE  *
  52 // OBSOLETE  * -1 means mach does not save it anywhere.
  53 // OBSOLETE  */
  54 // OBSOLETE static int reg_offset[] =
  55 // OBSOLETE {
  56 // OBSOLETE   /*  zero              at                v0                v1       */
  57 // OBSOLETE   -1, REG_OFFSET (r1), REG_OFFSET (r2), REG_OFFSET (r3),
  58 // OBSOLETE
  59 // OBSOLETE   /*  a0                a1                a2                a3       */
  60 // OBSOLETE   REG_OFFSET (r4), REG_OFFSET (r5), REG_OFFSET (r6), REG_OFFSET (r7),
  61 // OBSOLETE
  62 // OBSOLETE   /*  t0                t1                t2                t3       */
  63 // OBSOLETE   REG_OFFSET (r8), REG_OFFSET (r9), REG_OFFSET (r10), REG_OFFSET (r11),
  64 // OBSOLETE
  65 // OBSOLETE   /*  t4                t5                t6                t7       */
  66 // OBSOLETE   REG_OFFSET (r12), REG_OFFSET (r13), REG_OFFSET (r14), REG_OFFSET (r15),
  67 // OBSOLETE
  68 // OBSOLETE   /*  s0                s1                s2                s3       */
  69 // OBSOLETE   REG_OFFSET (r16), REG_OFFSET (r17), REG_OFFSET (r18), REG_OFFSET (r19),
  70 // OBSOLETE
  71 // OBSOLETE   /*  s4                s5                s6                s7       */
  72 // OBSOLETE   REG_OFFSET (r20), REG_OFFSET (r21), REG_OFFSET (r22), REG_OFFSET (r23),
  73 // OBSOLETE
  74 // OBSOLETE   /*  t8                t9                k0                k1       */
  75 // OBSOLETE   REG_OFFSET (r24), REG_OFFSET (r25), REG_OFFSET (r26), REG_OFFSET (r27),
  76 // OBSOLETE
  77 // OBSOLETE   /*  gp                sp            s8(30) == fp(72)      ra       */
  78 // OBSOLETE   REG_OFFSET (r28), REG_OFFSET (r29), REG_OFFSET (r30), REG_OFFSET (r31),
  79 // OBSOLETE
  80 // OBSOLETE   /*  sr(32) PS_REGNUM   */
  81 // OBSOLETE   EREG_OFFSET (coproc_state),
  82 // OBSOLETE
  83 // OBSOLETE   /*  lo(33)            hi(34)    */
  84 // OBSOLETE   REG_OFFSET (mdlo), REG_OFFSET (mdhi),
  85 // OBSOLETE
  86 // OBSOLETE   /*  bad(35)                 cause(36)          pc(37)  */
  87 // OBSOLETE   EREG_OFFSET (address), EREG_OFFSET (cause), REG_OFFSET (pc),
  88 // OBSOLETE
  89 // OBSOLETE   /*  f0(38)             f1(39)             f2(40)             f3(41)   */
  90 // OBSOLETE   CREG_OFFSET (r0), CREG_OFFSET (r1), CREG_OFFSET (r2), CREG_OFFSET (r3),
  91 // OBSOLETE   CREG_OFFSET (r4), CREG_OFFSET (r5), CREG_OFFSET (r6), CREG_OFFSET (r7),
  92 // OBSOLETE   CREG_OFFSET (r8), CREG_OFFSET (r9), CREG_OFFSET (r10), CREG_OFFSET (r11),
  93 // OBSOLETE   CREG_OFFSET (r12), CREG_OFFSET (r13), CREG_OFFSET (r14), CREG_OFFSET (r15),
  94 // OBSOLETE   CREG_OFFSET (r16), CREG_OFFSET (r17), CREG_OFFSET (r18), CREG_OFFSET (r19),
  95 // OBSOLETE   CREG_OFFSET (r20), CREG_OFFSET (r21), CREG_OFFSET (r22), CREG_OFFSET (r23),
  96 // OBSOLETE   CREG_OFFSET (r24), CREG_OFFSET (r25), CREG_OFFSET (r26), CREG_OFFSET (r27),
  97 // OBSOLETE   CREG_OFFSET (r28), CREG_OFFSET (r29), CREG_OFFSET (r30), CREG_OFFSET (r31),
  98 // OBSOLETE
  99 // OBSOLETE   /*  fsr(70)           fir(71)         fp(72) == s8(30) */
 100 // OBSOLETE   CREG_OFFSET (csr), CREG_OFFSET (esr), REG_OFFSET (r30)
 101 // OBSOLETE };
 102 // OBSOLETE #else
 103 // OBSOLETE /* If the compiler does not grok the above defines */
 104 // OBSOLETE static int reg_offset[] =
 105 // OBSOLETE {
 106 // OBSOLETE /* mach_thread_state offsets: */
 107 // OBSOLETE   -1, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,
 108 // OBSOLETE   60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120,
 109 // OBSOLETE /*sr, lo, hi,addr,cause,pc   */
 110 // OBSOLETE   8, 124, 128, 4, 0, 132,
 111 // OBSOLETE /* mach_float_state offsets: */
 112 // OBSOLETE   0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
 113 // OBSOLETE   64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
 114 // OBSOLETE /*fsr,fir */
 115 // OBSOLETE   128, 132,
 116 // OBSOLETE /* FP_REGNUM pseudo maps to s8==r30 in mach_thread_state */
 117 // OBSOLETE   116
 118 // OBSOLETE };
 119 // OBSOLETE #endif
 120 // OBSOLETE
 121 // OBSOLETE /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
 122 // OBSOLETE  * Caller knows that the regs handled in one transaction are of same size.
 123 // OBSOLETE  */
 124 // OBSOLETE #define FETCH_REGS(state, regnum, count) \
 125 // OBSOLETE   memcpy (&deprecated_registers[REGISTER_BYTE (regnum)], \
 126 // OBSOLETE       (char *)state+reg_offset[ regnum ], \
 127 // OBSOLETE       count*REGISTER_SIZE)
 128 // OBSOLETE
 129 // OBSOLETE /* Store COUNT contiguous registers to thread STATE starting from REGNUM */
 130 // OBSOLETE #define STORE_REGS(state, regnum, count) \
 131 // OBSOLETE   memcpy ((char *)state+reg_offset[ regnum ], \
 132 // OBSOLETE       &deprecated_registers[REGISTER_BYTE (regnum)], \
 133 // OBSOLETE       count*REGISTER_SIZE)
 134 // OBSOLETE
 135 // OBSOLETE #define REGS_ALL    -1
 136 // OBSOLETE #define REGS_NORMAL  1
 137 // OBSOLETE #define REGS_EXC     2
 138 // OBSOLETE #define REGS_COP1    4
 139 // OBSOLETE
 140 // OBSOLETE /* Hardware regs that matches FP_REGNUM */
 141 // OBSOLETE #define MACH_FP_REGNUM 30
 142 // OBSOLETE
 143 // OBSOLETE /* Fech thread's registers. if regno == -1, fetch all regs */
 144 // OBSOLETE void
 145 // OBSOLETE fetch_inferior_registers (int regno)
 146 // OBSOLETE {
 147 // OBSOLETE   kern_return_t ret;
 148 // OBSOLETE
 149 // OBSOLETE   thread_state_data_t state;
 150 // OBSOLETE   struct mips_exc_state exc_state;
 151 // OBSOLETE
 152 // OBSOLETE   int stateCnt = MIPS_THREAD_STATE_COUNT;
 153 // OBSOLETE
 154 // OBSOLETE   int which_regs = 0;               /* A bit mask */
 155 // OBSOLETE
 156 // OBSOLETE   if (!MACH_PORT_VALID (current_thread))
 157 // OBSOLETE     error ("fetch inferior registers: Invalid thread");
 158 // OBSOLETE
 159 // OBSOLETE   if (regno < -1 || regno >= NUM_REGS)
 160 // OBSOLETE     error ("invalid register %d supplied to fetch_inferior_registers", regno);
 161 // OBSOLETE
 162 // OBSOLETE   if (regno == -1)
 163 // OBSOLETE     which_regs = REGS_ALL;
 164 // OBSOLETE   else if (regno == ZERO_REGNUM)
 165 // OBSOLETE     {
 166 // OBSOLETE       int zero = 0;
 167 // OBSOLETE       supply_register (ZERO_REGNUM, &zero);
 168 // OBSOLETE       return;
 169 // OBSOLETE     }
 170 // OBSOLETE   else if ((ZERO_REGNUM < regno && regno < PS_REGNUM)
 171 // OBSOLETE        || regno == FP_REGNUM
 172 // OBSOLETE        || regno == LO_REGNUM
 173 // OBSOLETE        || regno == HI_REGNUM
 174 // OBSOLETE        || regno == PC_REGNUM)
 175 // OBSOLETE     which_regs = REGS_NORMAL;
 176 // OBSOLETE   else if (FP0_REGNUM <= regno && regno <= FCRIR_REGNUM)
 177 // OBSOLETE     which_regs = REGS_COP1 | REGS_EXC;
 178 // OBSOLETE   else
 179 // OBSOLETE     which_regs = REGS_EXC;
 180 // OBSOLETE
 181 // OBSOLETE   /* fetch regs saved to mips_thread_state */
 182 // OBSOLETE   if (which_regs & REGS_NORMAL)
 183 // OBSOLETE     {
 184 // OBSOLETE       ret = thread_get_state (current_thread,
 185 // OBSOLETE                           MIPS_THREAD_STATE,
 186 // OBSOLETE                           state,
 187 // OBSOLETE                           &stateCnt);
 188 // OBSOLETE       CHK ("fetch inferior registers: thread_get_state", ret);
 189 // OBSOLETE
 190 // OBSOLETE       if (which_regs == REGS_NORMAL)
 191 // OBSOLETE     {
 192 // OBSOLETE       /* Fetch also FP_REGNUM if fetching MACH_FP_REGNUM and vice versa */
 193 // OBSOLETE       if (regno == MACH_FP_REGNUM || regno == FP_REGNUM)
 194 // OBSOLETE         {
 195 // OBSOLETE           supply_register (FP_REGNUM,
 196 // OBSOLETE                            (char *) state + reg_offset[MACH_FP_REGNUM]);
 197 // OBSOLETE           supply_register (MACH_FP_REGNUM,
 198 // OBSOLETE                            (char *) state + reg_offset[MACH_FP_REGNUM]);
 199 // OBSOLETE         }
 200 // OBSOLETE       else
 201 // OBSOLETE         supply_register (regno,
 202 // OBSOLETE                          (char *) state + reg_offset[regno]);
 203 // OBSOLETE       return;
 204 // OBSOLETE     }
 205 // OBSOLETE
 206 // OBSOLETE       /* ZERO_REGNUM is always zero */
 207 // OBSOLETE       *(int *) deprecated_registers = 0;
 208 // OBSOLETE
 209 // OBSOLETE       /* Copy thread saved regs 1..31 to gdb's reg value array
 210 // OBSOLETE        * Luckily, they are contiquous
 211 // OBSOLETE        */
 212 // OBSOLETE       FETCH_REGS (state, 1, 31);
 213 // OBSOLETE
 214 // OBSOLETE       /* Copy mdlo and mdhi */
 215 // OBSOLETE       FETCH_REGS (state, LO_REGNUM, 2);
 216 // OBSOLETE
 217 // OBSOLETE       /* Copy PC */
 218 // OBSOLETE       FETCH_REGS (state, PC_REGNUM, 1);
 219 // OBSOLETE
 220 // OBSOLETE       /* Mach 3.0 saves FP to MACH_FP_REGNUM.
 221 // OBSOLETE        * For some reason gdb wants to assign a pseudo register for it.
 222 // OBSOLETE        */
 223 // OBSOLETE       FETCH_REGS (state, FP_REGNUM, 1);
 224 // OBSOLETE     }
 225 // OBSOLETE
 226 // OBSOLETE   /* Read exc state. Also read if need to fetch floats */
 227 // OBSOLETE   if (which_regs & REGS_EXC)
 228 // OBSOLETE     {
 229 // OBSOLETE       stateCnt = MIPS_EXC_STATE_COUNT;
 230 // OBSOLETE       ret = thread_get_state (current_thread,
 231 // OBSOLETE                           MIPS_EXC_STATE,
 232 // OBSOLETE                           (thread_state_t) & exc_state,
 233 // OBSOLETE                           &stateCnt);
 234 // OBSOLETE       CHK ("fetch inferior regs (exc): thread_get_state", ret);
 235 // OBSOLETE
 236 // OBSOLETE       /* We need to fetch exc_state to see if the floating
 237 // OBSOLETE        * state is valid for the thread.
 238 // OBSOLETE        */
 239 // OBSOLETE
 240 // OBSOLETE       /* cproc_state: Which coprocessors the thread uses */
 241 // OBSOLETE       supply_register (PS_REGNUM,
 242 // OBSOLETE                    (char *) &exc_state + reg_offset[PS_REGNUM]);
 243 // OBSOLETE
 244 // OBSOLETE       if (which_regs == REGS_EXC || which_regs == REGS_ALL)
 245 // OBSOLETE     {
 246 // OBSOLETE       supply_register (BADVADDR_REGNUM,
 247 // OBSOLETE                      (char *) &exc_state + reg_offset[BADVADDR_REGNUM]);
 248 // OBSOLETE
 249 // OBSOLETE       supply_register (CAUSE_REGNUM,
 250 // OBSOLETE                        (char *) &exc_state + reg_offset[CAUSE_REGNUM]);
 251 // OBSOLETE       if (which_regs == REGS_EXC)
 252 // OBSOLETE         return;
 253 // OBSOLETE     }
 254 // OBSOLETE     }
 255 // OBSOLETE
 256 // OBSOLETE
 257 // OBSOLETE   if (which_regs & REGS_COP1)
 258 // OBSOLETE     {
 259 // OBSOLETE       /* If the thread does not have saved COPROC1, set regs to zero */
 260 // OBSOLETE
 261 // OBSOLETE       if (!(exc_state.coproc_state & MIPS_STATUS_USE_COP1))
 262 // OBSOLETE     bzero (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)],
 263 // OBSOLETE            sizeof (struct mips_float_state));
 264 // OBSOLETE       else
 265 // OBSOLETE     {
 266 // OBSOLETE       stateCnt = MIPS_FLOAT_STATE_COUNT;
 267 // OBSOLETE       ret = thread_get_state (current_thread,
 268 // OBSOLETE                               MIPS_FLOAT_STATE,
 269 // OBSOLETE                               state,
 270 // OBSOLETE                               &stateCnt);
 271 // OBSOLETE       CHK ("fetch inferior regs (floats): thread_get_state", ret);
 272 // OBSOLETE
 273 // OBSOLETE       if (regno != -1)
 274 // OBSOLETE         {
 275 // OBSOLETE           supply_register (regno,
 276 // OBSOLETE                            (char *) state + reg_offset[regno]);
 277 // OBSOLETE           return;
 278 // OBSOLETE         }
 279 // OBSOLETE
 280 // OBSOLETE       FETCH_REGS (state, FP0_REGNUM, 34);
 281 // OBSOLETE     }
 282 // OBSOLETE     }
 283 // OBSOLETE
 284 // OBSOLETE   /* All registers are valid, if not returned yet */
 285 // OBSOLETE   deprecated_registers_fetched ();
 286 // OBSOLETE }
 287 // OBSOLETE
 288 // OBSOLETE /* Store gdb's view of registers to the thread.
 289 // OBSOLETE  * All registers are always valid when entering here.
 290 // OBSOLETE  * @@ ahem, maybe that is too strict, we could validate the necessary ones
 291 // OBSOLETE  *    here.
 292 // OBSOLETE  *
 293 // OBSOLETE  * Hmm. It seems that gdb set $reg=value command first reads everything,
 294 // OBSOLETE  * then sets the reg and then stores everything. -> we must make sure
 295 // OBSOLETE  * that the immutable registers are not changed by reading them first.
 296 // OBSOLETE  */
 297 // OBSOLETE
 298 // OBSOLETE void
 299 // OBSOLETE store_inferior_registers (register int regno)
 300 // OBSOLETE {
 301 // OBSOLETE   thread_state_data_t state;
 302 // OBSOLETE   kern_return_t ret;
 303 // OBSOLETE
 304 // OBSOLETE   if (!MACH_PORT_VALID (current_thread))
 305 // OBSOLETE     error ("store inferior registers: Invalid thread");
 306 // OBSOLETE
 307 // OBSOLETE   /* Check for read only regs.
 308 // OBSOLETE    * @@ If some of these is can be changed, fix this
 309 // OBSOLETE    */
 310 // OBSOLETE   if (regno == ZERO_REGNUM ||
 311 // OBSOLETE       regno == PS_REGNUM ||
 312 // OBSOLETE       regno == BADVADDR_REGNUM ||
 313 // OBSOLETE       regno == CAUSE_REGNUM ||
 314 // OBSOLETE       regno == FCRIR_REGNUM)
 315 // OBSOLETE     {
 316 // OBSOLETE       message ("You can not alter read-only register `%s'",
 317 // OBSOLETE            REGISTER_NAME (regno));
 318 // OBSOLETE       fetch_inferior_registers (regno);
 319 // OBSOLETE       return;
 320 // OBSOLETE     }
 321 // OBSOLETE
 322 // OBSOLETE   if (regno == -1)
 323 // OBSOLETE     {
 324 // OBSOLETE       /* Don't allow these to change */
 325 // OBSOLETE
 326 // OBSOLETE       /* ZERO_REGNUM */
 327 // OBSOLETE       *(int *) deprecated_registers = 0;
 328 // OBSOLETE
 329 // OBSOLETE       fetch_inferior_registers (PS_REGNUM);
 330 // OBSOLETE       fetch_inferior_registers (BADVADDR_REGNUM);
 331 // OBSOLETE       fetch_inferior_registers (CAUSE_REGNUM);
 332 // OBSOLETE       fetch_inferior_registers (FCRIR_REGNUM);
 333 // OBSOLETE     }
 334 // OBSOLETE
 335 // OBSOLETE   if (regno == -1 || (ZERO_REGNUM < regno && regno <= PC_REGNUM))
 336 // OBSOLETE     {
 337 // OBSOLETE #if 1
 338 // OBSOLETE       /* Mach 3.0 saves thread's FP to MACH_FP_REGNUM.
 339 // OBSOLETE        * GDB wants assigns a pseudo register FP_REGNUM for frame pointer.
 340 // OBSOLETE        *
 341 // OBSOLETE        * @@@ Here I assume (!) that gdb's FP has the value that
 342 // OBSOLETE        *     should go to threads frame pointer. If not true, this
 343 // OBSOLETE        *     fails badly!!!!!
 344 // OBSOLETE        */
 345 // OBSOLETE       memcpy (&deprecated_registers[REGISTER_BYTE (MACH_FP_REGNUM)],
 346 // OBSOLETE           &deprecated_registers[REGISTER_BYTE (FP_REGNUM)],
 347 // OBSOLETE           REGISTER_RAW_SIZE (FP_REGNUM));
 348 // OBSOLETE #endif
 349 // OBSOLETE
 350 // OBSOLETE       /* Save gdb's regs 1..31 to thread saved regs 1..31
 351 // OBSOLETE        * Luckily, they are contiquous
 352 // OBSOLETE        */
 353 // OBSOLETE       STORE_REGS (state, 1, 31);
 354 // OBSOLETE
 355 // OBSOLETE       /* Save mdlo, mdhi */
 356 // OBSOLETE       STORE_REGS (state, LO_REGNUM, 2);
 357 // OBSOLETE
 358 // OBSOLETE       /* Save PC */
 359 // OBSOLETE       STORE_REGS (state, PC_REGNUM, 1);
 360 // OBSOLETE
 361 // OBSOLETE       ret = thread_set_state (current_thread,
 362 // OBSOLETE                           MIPS_THREAD_STATE,
 363 // OBSOLETE                           state,
 364 // OBSOLETE                           MIPS_FLOAT_STATE_COUNT);
 365 // OBSOLETE       CHK ("store inferior regs : thread_set_state", ret);
 366 // OBSOLETE     }
 367 // OBSOLETE
 368 // OBSOLETE   if (regno == -1 || regno >= FP0_REGNUM)
 369 // OBSOLETE     {
 370 // OBSOLETE       /* If thread has floating state, save it */
 371 // OBSOLETE       if (read_register (PS_REGNUM) & MIPS_STATUS_USE_COP1)
 372 // OBSOLETE     {
 373 // OBSOLETE       /* Do NOT save FCRIR_REGNUM */
 374 // OBSOLETE       STORE_REGS (state, FP0_REGNUM, 33);
 375 // OBSOLETE
 376 // OBSOLETE       ret = thread_set_state (current_thread,
 377 // OBSOLETE                               MIPS_FLOAT_STATE,
 378 // OBSOLETE                               state,
 379 // OBSOLETE                               MIPS_FLOAT_STATE_COUNT);
 380 // OBSOLETE       CHK ("store inferior registers (floats): thread_set_state", ret);
 381 // OBSOLETE     }
 382 // OBSOLETE       else if (regno != -1)
 383 // OBSOLETE     message
 384 // OBSOLETE       ("Thread does not use floating point unit, floating regs not saved");
 385 // OBSOLETE     }
 386 // OBSOLETE }