gdb/cxux-nat.c

   1 /* Native support for Motorola 88k running Harris CX/UX.
   2    Copyright 1988, 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "defs.h"
  21 #include "frame.h"
  22 #include "inferior.h"
  23
  24 #include <sys/types.h>
  25 #include <sys/param.h>
  26 #include <sys/dir.h>
  27 #include <signal.h>
  28 #include "gdbcore.h"
  29 #include <sys/user.h>
  30
  31 #include "bfd.h"
  32 #include "symfile.h"
  33 #include "objfiles.h"
  34 #include "symtab.h"
  35
  36 #ifndef USER                    /* added to support BCS ptrace_user */
  37 #define USER ptrace_user
  38 #endif
  39 #include <sys/ioctl.h>
  40 #include <fcntl.h>
  41 #include <sys/file.h>
  42 #include "gdb_stat.h"
  43
  44 #include "symtab.h"
  45 #include "setjmp.h"
  46 #include "value.h"
  47
  48 #include <sys/ptrace.h>
  49
  50 /* CX/UX provides them already, but as word offsets instead of char offsets */
  51 #define SXIP_OFFSET (PT_SXIP * 4)
  52 #define SNIP_OFFSET (PT_SNIP * 4)
  53 #define SFIP_OFFSET (PT_SFIP * 4)
  54 #define PSR_OFFSET  (PT_PSR  * sizeof(int))
  55 #define FPSR_OFFSET (PT_FPSR * sizeof(int))
  56 #define FPCR_OFFSET (PT_FPCR * sizeof(int))
  57
  58 #define XREGADDR(r) (((char *)&u.pt_x0-(char *)&u) + \
  59                      ((r)-X0_REGNUM)*sizeof(X_REGISTER_RAW_TYPE))
  60
  61 extern int have_symbol_file_p();
  62
  63 extern jmp_buf stack_jmp;
  64
  65 extern int errno;
  66
  67 void
  68 fetch_inferior_registers (regno)
  69      int regno;         /* Original value discarded */
  70 {
  71   register unsigned int regaddr;
  72   char buf[MAX_REGISTER_RAW_SIZE];
  73   register int i;
  74
  75   struct USER u;
  76   unsigned int offset;
  77
  78   offset = (char *) &u.pt_r0 - (char *) &u;
  79   regaddr = offset; /* byte offset to r0;*/
  80
  81 /*  offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
  82   for (regno = 0; regno < PC_REGNUM; regno++)
  83     {
  84       /*regaddr = register_addr (regno, offset);*/
  85         /* 88k enhancement  */
  86
  87       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  88         {
  89           *(int *) &buf[i] = ptrace (3, inferior_pid,
  90                                      (PTRACE_ARG3_TYPE) regaddr, 0);
  91           regaddr += sizeof (int);
  92         }
  93       supply_register (regno, buf);
  94     }
  95     /* now load up registers 32-37; special pc registers */
  96     *(int *) &buf[0] = ptrace (3, inferior_pid,
  97                                (PTRACE_ARG3_TYPE) PSR_OFFSET,0);
  98     supply_register (PSR_REGNUM, buf);
  99     *(int *) &buf[0] = ptrace (3, inferior_pid,
 100                                (PTRACE_ARG3_TYPE) FPSR_OFFSET,0);
 101     supply_register (FPSR_REGNUM, buf);
 102     *(int *) &buf[0] = ptrace (3, inferior_pid,
 103                                (PTRACE_ARG3_TYPE) FPCR_OFFSET,0);
 104     supply_register (FPCR_REGNUM, buf);
 105     *(int *) &buf[0] = ptrace (3,inferior_pid,
 106                                (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
 107     supply_register (SXIP_REGNUM, buf);
 108     *(int *) &buf[0] = ptrace (3, inferior_pid,
 109                                (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
 110     supply_register (SNIP_REGNUM, buf);
 111     *(int *) &buf[0] = ptrace (3, inferior_pid,
 112                                (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
 113     supply_register (SFIP_REGNUM, buf);
 114
 115     if (target_is_m88110)
 116       {
 117         for (regaddr = XREGADDR(X0_REGNUM), regno = X0_REGNUM;
 118              regno < NUM_REGS;
 119              regno++, regaddr += 16)
 120           {
 121             X_REGISTER_RAW_TYPE xval;
 122
 123             *(int *) &xval.w1 = ptrace (3, inferior_pid,
 124                                         (PTRACE_ARG3_TYPE) regaddr, 0);
 125             *(int *) &xval.w2 = ptrace (3, inferior_pid,
 126                                         (PTRACE_ARG3_TYPE) (regaddr+4), 0);
 127             *(int *) &xval.w3 = ptrace (3, inferior_pid,
 128                                         (PTRACE_ARG3_TYPE) (regaddr+8), 0);
 129             *(int *) &xval.w4 = ptrace (3, inferior_pid,
 130                                         (PTRACE_ARG3_TYPE) (regaddr+12), 0);
 131             supply_register(regno, (void *)&xval);
 132           }
 133       }
 134 }
 135
 136 /* Store our register values back into the inferior.
 137    If REGNO is -1, do this for all registers.
 138    Otherwise, REGNO specifies which register (so we can save time).  */
 139
 140 void
 141 store_inferior_registers (regno)
 142      int regno;
 143 {
 144   register unsigned int regaddr;
 145   char buf[80];
 146
 147   struct USER u;
 148
 149   unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
 150
 151   regaddr = offset;
 152
 153   /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
 154      svr3 doesn't run on an 88110, or the kernel isolates the different (not
 155      completely sure this is true, but seems to be.  */
 156   if (regno >= 0)
 157     {
 158       /*      regaddr = register_addr (regno, offset); */
 159       if (regno < PC_REGNUM)
 160         {
 161           regaddr = offset + regno * sizeof (int);
 162           errno = 0;
 163           ptrace (6, inferior_pid,
 164                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 165           if (errno != 0)
 166             {
 167               sprintf (buf, "writing register number %d", regno);
 168               perror_with_name (buf);
 169             }
 170         }
 171       else if (regno == PSR_REGNUM)
 172         ptrace (6, inferior_pid,
 173                 (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
 174       else if (regno == FPSR_REGNUM)
 175         ptrace (6, inferior_pid,
 176                 (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register(regno));
 177       else if (regno == FPCR_REGNUM)
 178         ptrace (6, inferior_pid,
 179                 (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register(regno));
 180       else if (regno == SXIP_REGNUM)
 181         ptrace (6, inferior_pid,
 182                 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
 183       else if (regno == SNIP_REGNUM)
 184         ptrace (6, inferior_pid,
 185                 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
 186       else if (regno == SFIP_REGNUM)
 187         ptrace (6, inferior_pid,
 188                 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
 189       else if (target_is_m88110 && regno < NUM_REGS)
 190         {
 191           X_REGISTER_RAW_TYPE xval;
 192
 193           read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
 194                               sizeof(X_REGISTER_RAW_TYPE));
 195           regaddr = XREGADDR(regno);
 196           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 197           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+4, xval.w2);
 198           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+8, xval.w3);
 199           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+12, xval.w4);
 200         }
 201       else
 202         printf_unfiltered ("Bad register number for store_inferior routine\n");
 203     }
 204   else
 205     {
 206       for (regno = 0; regno < PC_REGNUM; regno++)
 207         {
 208           /*      regaddr = register_addr (regno, offset); */
 209           errno = 0;
 210           regaddr = offset + regno * sizeof (int);
 211           ptrace (6, inferior_pid,
 212                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 213           if (errno != 0)
 214             {
 215               sprintf (buf, "writing register number %d", regno);
 216               perror_with_name (buf);
 217             }
 218         }
 219       ptrace (6, inferior_pid,
 220               (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
 221       ptrace (6, inferior_pid,
 222               (PTRACE_ARG3_TYPE) FPSR_OFFSET,read_register(regno));
 223       ptrace (6, inferior_pid,
 224               (PTRACE_ARG3_TYPE) FPCR_OFFSET,read_register(regno));
 225       ptrace (6,inferior_pid,
 226               (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
 227       ptrace (6,inferior_pid,
 228               (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
 229       ptrace (6,inferior_pid,
 230               (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
 231       if (target_is_m88110)
 232         {
 233           for (regno = X0_REGNUM; regno < NUM_REGS; regno++)
 234             {
 235               X_REGISTER_RAW_TYPE xval;
 236
 237               read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
 238                                   sizeof(X_REGISTER_RAW_TYPE));
 239               regaddr = XREGADDR(regno);
 240               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 241               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+4), xval.w2);
 242               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+8), xval.w3);
 243               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+12), xval.w4);
 244             }
 245         }
 246     }
 247 }
 248
 249 /* blockend is the address of the end of the user structure */
 250
 251 m88k_register_u_addr (blockend, regnum)
 252      int blockend, regnum;
 253 {
 254   struct USER u;
 255   int ustart = blockend - sizeof (struct USER);
 256
 257   if (regnum < PSR_REGNUM)
 258       return (ustart + ((int) &u.pt_r0 - (int) &u) +
 259               REGISTER_SIZE * regnum);
 260   else if (regnum == PSR_REGNUM)
 261       return (ustart + ((int) &u.pt_psr) - (int) &u);
 262   else if (regnum == FPSR_REGNUM)
 263       return (ustart + ((int) &u.pt_fpsr) - (int) &u);
 264   else if (regnum == FPCR_REGNUM)
 265       return (ustart + ((int) &u.pt_fpcr) - (int) &u);
 266   else if (regnum == SXIP_REGNUM)
 267       return (ustart + SXIP_OFFSET);
 268   else if (regnum == SNIP_REGNUM)
 269       return (ustart + SNIP_OFFSET);
 270   else if (regnum == SFIP_REGNUM)
 271       return (ustart + SFIP_OFFSET);
 272   else if (target_is_m88110)
 273       return (ustart + ((int) &u.pt_x0 - (int) &u) +   /* Must be X register */
 274                sizeof(u.pt_x0) * (regnum - X0_REGNUM));
 275   else
 276       return (blockend + REGISTER_SIZE * regnum);
 277 }
 278
 279 #ifdef USE_PROC_FS
 280
 281 #include <sys/procfs.h>
 282
 283 /*  Given a pointer to a general register set in /proc format (gregset_t *),
 284     unpack the register contents and supply them as gdb's idea of the current
 285     register values. */
 286
 287 void
 288 supply_gregset (gregsetp)
 289      gregset_t *gregsetp;
 290 {
 291     register int regi;
 292     register greg_t *regp = (greg_t *) gregsetp;
 293
 294     for (regi=0; regi <= SP_REGNUM; regi++)
 295         supply_register (regi, (char *) (regp + regi));
 296
 297     supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
 298     supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
 299     supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
 300     supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
 301     supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 302     supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 303 }
 304
 305 void
 306 fill_gregset (gregsetp, regno)
 307      gregset_t *gregsetp;
 308      int regno;
 309 {
 310     int regi;
 311     register greg_t *regp = (greg_t *) gregsetp;
 312
 313     for (regi = 0 ; regi <= R_R31 ; regi++)
 314         if ((regno == -1) || (regno == regi))
 315             *(regp + regi) = *(int *) &registers[REGISTER_BYTE(regi)];
 316
 317     if ((regno == -1) || (regno == SXIP_REGNUM))
 318         *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
 319     if ((regno == -1) || (regno == SNIP_REGNUM))
 320         *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
 321     if ((regno == -1) || (regno == SFIP_REGNUM))
 322         *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
 323     if ((regno == -1) || (regno == PSR_REGNUM))
 324         *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
 325     if ((regno == -1) || (regno == FPSR_REGNUM))
 326         *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
 327     if ((regno == -1) || (regno == FPCR_REGNUM))
 328         *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
 329 }
 330
 331 #endif /* USE_PROC_FS */
 332
 333 /* This support adds the equivalent of adb's % command.  When
 334    the `add-shared-symbol-files' command is given, this routine scans
 335    the dynamic linker's link map and reads the minimal symbols
 336    from each shared object file listed in the map. */
 337
 338 struct link_map {
 339   unsigned long l_addr;         /* address at which object is mapped */
 340   char *l_name;                 /* full name of loaded object */
 341   void *l_ld;                   /* dynamic structure of object */
 342   struct link_map *l_next;      /* next link object */
 343   struct link_map *l_prev;      /* previous link object */
 344 };
 345
 346 #define LINKS_MAP_POINTER "_ld_tail"
 347 #define LIBC_FILE "/usr/lib/libc.so.1"
 348 #define SHARED_OFFSET 0xf0001000
 349
 350 #ifndef PATH_MAX
 351 #define PATH_MAX 1023           /* maximum size of path name on OS */
 352 #endif
 353
 354 void
 355 add_shared_symbol_files ()
 356 {
 357   void *desc;
 358   struct link_map *ld_map, *lm, lms;
 359   struct minimal_symbol *minsym;
 360   struct objfile *objfile;
 361   char *path_name;
 362
 363   if (! inferior_pid)
 364     {
 365       warning ("The program has not yet been started.");
 366       return;
 367     }
 368
 369   objfile = symbol_file_add (LIBC_FILE, 0, 0, 0, 0, 1, 0, 0);
 370   minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
 371
 372   ld_map = (struct link_map *)
 373     read_memory_integer (((int)SYMBOL_VALUE_ADDRESS(minsym) + SHARED_OFFSET), 4);
 374   lm = ld_map;
 375   while (lm)
 376     {
 377       int local_errno = 0;
 378
 379       read_memory ((CORE_ADDR)lm, (char*)&lms, sizeof (struct link_map));
 380       if (lms.l_name)
 381         {
 382           if (target_read_string ((CORE_ADDR)lms.l_name, &path_name,
 383                                   PATH_MAX, &local_errno))
 384             {
 385               symbol_file_add (path_name, 1, lms.l_addr, 0, 0, 0, 0, 0);
 386               free(path_name);
 387             }
 388         }
 389       /* traverse links in reverse order so that we get the
 390          the symbols the user actually gets. */
 391       lm = lms.l_prev;
 392     }
 393
 394   /* Getting new symbols may change our opinion about what is
 395      frameless.  */
 396   reinit_frame_cache ();
 397 }
 398
 399 #if defined(_ES_MP)
 400
 401 #include <sys/regset.h>
 402
 403 unsigned int
 404 m88k_harris_core_register_addr (regno, reg_ptr)
 405      int regno, reg_ptr;
 406 {
 407    unsigned int word_offset;
 408
 409    switch (regno)
 410      {
 411      case PSR_REGNUM:
 412        word_offset = R_EPSR;
 413        break;
 414      case FPSR_REGNUM:
 415        word_offset = R_FPSR;
 416        break;
 417      case FPCR_REGNUM:
 418        word_offset = R_FPCR;
 419        break;
 420      case SXIP_REGNUM:
 421        word_offset = R_EXIP;
 422        break;
 423      case SNIP_REGNUM:
 424        word_offset = R_ENIP;
 425        break;
 426      case SFIP_REGNUM:
 427        word_offset = R_EFIP;
 428        break;
 429      default:
 430        if (regno <= FP_REGNUM)
 431          word_offset = regno;
 432        else
 433          word_offset = ((regno - X0_REGNUM) * 4);
 434      }
 435    return (word_offset * 4);
 436 }
 437
 438 #endif /* _ES_MP */
 439
 440 void
 441 _initialize_m88k_nat()
 442 {
 443 #ifdef _ES_MP
 444    /* Enable 88110 support, as we don't support the 88100 under ES/MP.  */
 445
 446    target_is_m88110 = 1;
 447 #elif defined(_CX_UX)
 448    /* Determine whether we're running on an 88100 or an 88110.  */
 449    target_is_m88110 = (sinfo(SYSMACHINE,0) == SYS5800);
 450 #endif /* _CX_UX */
 451 }
 452
 453 #ifdef _ES_MP
 454 /* Given a pointer to a general register set in /proc format (gregset_t *),
 455    unpack the register contents and supply them as gdb's idea of the current
 456    register values. */
 457
 458 void
 459 supply_gregset (gregsetp)
 460      gregset_t *gregsetp;
 461 {
 462   register int regi;
 463   register greg_t *regp = (greg_t *) gregsetp;
 464
 465   for (regi = 0 ; regi < R_R31 ; regi++)
 466     {
 467       supply_register (regi, (char *) (regp + regi));
 468     }
 469   supply_register (PSR_REGNUM,  (char *) (regp + R_EPSR));
 470   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 471   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 472   supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
 473   supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
 474   supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
 475 }
 476
 477 /* Given a pointer to a floating point register set in /proc format
 478    (fpregset_t *), unpack the register contents and supply them as gdb's
 479    idea of the current floating point register values.  */
 480
 481 void
 482 supply_fpregset (fpregsetp)
 483      fpregset_t *fpregsetp;
 484 {
 485   register int regi;
 486   char *from;
 487
 488   for (regi = FP0_REGNUM ; regi <= FPLAST_REGNUM ; regi++)
 489     {
 490       from = (char *) &((*fpregsetp)[regi-FP0_REGNUM]);
 491       supply_register (regi, from);
 492     }
 493 }
 494
 495 #endif /* _ES_MP */
 496
 497 #ifdef _CX_UX
 498
 499 #include <sys/regset.h>
 500
 501 unsigned int m88k_harris_core_register_addr(int regno, int reg_ptr)
 502 {
 503    unsigned int word_offset;
 504
 505    switch (regno) {
 506     case PSR_REGNUM  : word_offset = R_PSR;  break;
 507     case FPSR_REGNUM : word_offset = R_FPSR; break;
 508     case FPCR_REGNUM : word_offset = R_FPCR; break;
 509     case SXIP_REGNUM : word_offset = R_XIP;  break;
 510     case SNIP_REGNUM : word_offset = R_NIP;  break;
 511     case SFIP_REGNUM : word_offset = R_FIP;  break;
 512     default :
 513       if (regno <= FP_REGNUM)
 514             word_offset = regno;
 515       else
 516             word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
 517    }
 518    return (word_offset * 4);
 519 }
 520
 521 #endif /* _CX_UX */