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 extern char registers[REGISTER_BYTES];
  67
  68 void
  69 fetch_inferior_registers (regno)
  70      int regno;         /* Original value discarded */
  71 {
  72   register unsigned int regaddr;
  73   char buf[MAX_REGISTER_RAW_SIZE];
  74   register int i;
  75
  76   struct USER u;
  77   unsigned int offset;
  78
  79   offset = (char *) &u.pt_r0 - (char *) &u;
  80   regaddr = offset; /* byte offset to r0;*/
  81
  82 /*  offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
  83   for (regno = 0; regno < PC_REGNUM; regno++)
  84     {
  85       /*regaddr = register_addr (regno, offset);*/
  86         /* 88k enhancement  */
  87
  88       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  89         {
  90           *(int *) &buf[i] = ptrace (3, inferior_pid,
  91                                      (PTRACE_ARG3_TYPE) regaddr, 0);
  92           regaddr += sizeof (int);
  93         }
  94       supply_register (regno, buf);
  95     }
  96     /* now load up registers 32-37; special pc registers */
  97     *(int *) &buf[0] = ptrace (3, inferior_pid,
  98                                (PTRACE_ARG3_TYPE) PSR_OFFSET,0);
  99     supply_register (PSR_REGNUM, buf);
 100     *(int *) &buf[0] = ptrace (3, inferior_pid,
 101                                (PTRACE_ARG3_TYPE) FPSR_OFFSET,0);
 102     supply_register (FPSR_REGNUM, buf);
 103     *(int *) &buf[0] = ptrace (3, inferior_pid,
 104                                (PTRACE_ARG3_TYPE) FPCR_OFFSET,0);
 105     supply_register (FPCR_REGNUM, buf);
 106     *(int *) &buf[0] = ptrace (3,inferior_pid,
 107                                (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
 108     supply_register (SXIP_REGNUM, buf);
 109     *(int *) &buf[0] = ptrace (3, inferior_pid,
 110                                (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
 111     supply_register (SNIP_REGNUM, buf);
 112     *(int *) &buf[0] = ptrace (3, inferior_pid,
 113                                (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
 114     supply_register (SFIP_REGNUM, buf);
 115
 116     if (target_is_m88110)
 117       {
 118         for (regaddr = XREGADDR(X0_REGNUM), regno = X0_REGNUM;
 119              regno < NUM_REGS;
 120              regno++, regaddr += 16)
 121           {
 122             X_REGISTER_RAW_TYPE xval;
 123
 124             *(int *) &xval.w1 = ptrace (3, inferior_pid,
 125                                         (PTRACE_ARG3_TYPE) regaddr, 0);
 126             *(int *) &xval.w2 = ptrace (3, inferior_pid,
 127                                         (PTRACE_ARG3_TYPE) (regaddr+4), 0);
 128             *(int *) &xval.w3 = ptrace (3, inferior_pid,
 129                                         (PTRACE_ARG3_TYPE) (regaddr+8), 0);
 130             *(int *) &xval.w4 = ptrace (3, inferior_pid,
 131                                         (PTRACE_ARG3_TYPE) (regaddr+12), 0);
 132             supply_register(regno, (void *)&xval);
 133           }
 134       }
 135 }
 136
 137 /* Store our register values back into the inferior.
 138    If REGNO is -1, do this for all registers.
 139    Otherwise, REGNO specifies which register (so we can save time).  */
 140
 141 void
 142 store_inferior_registers (regno)
 143      int regno;
 144 {
 145   register unsigned int regaddr;
 146   char buf[80];
 147
 148   struct USER u;
 149
 150   unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
 151
 152   regaddr = offset;
 153
 154   /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
 155      svr3 doesn't run on an 88110, or the kernel isolates the different (not
 156      completely sure this is true, but seems to be.  */
 157   if (regno >= 0)
 158     {
 159       /*      regaddr = register_addr (regno, offset); */
 160       if (regno < PC_REGNUM)
 161         {
 162           regaddr = offset + regno * sizeof (int);
 163           errno = 0;
 164           ptrace (6, inferior_pid,
 165                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 166           if (errno != 0)
 167             {
 168               sprintf (buf, "writing register number %d", regno);
 169               perror_with_name (buf);
 170             }
 171         }
 172       else if (regno == PSR_REGNUM)
 173         ptrace (6, inferior_pid,
 174                 (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
 175       else if (regno == FPSR_REGNUM)
 176         ptrace (6, inferior_pid,
 177                 (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register(regno));
 178       else if (regno == FPCR_REGNUM)
 179         ptrace (6, inferior_pid,
 180                 (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register(regno));
 181       else if (regno == SXIP_REGNUM)
 182         ptrace (6, inferior_pid,
 183                 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
 184       else if (regno == SNIP_REGNUM)
 185         ptrace (6, inferior_pid,
 186                 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
 187       else if (regno == SFIP_REGNUM)
 188         ptrace (6, inferior_pid,
 189                 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
 190       else if (target_is_m88110 && regno < NUM_REGS)
 191         {
 192           X_REGISTER_RAW_TYPE xval;
 193
 194           read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
 195                               sizeof(X_REGISTER_RAW_TYPE));
 196           regaddr = XREGADDR(regno);
 197           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 198           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+4, xval.w2);
 199           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+8, xval.w3);
 200           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr+12, xval.w4);
 201         }
 202       else
 203         printf_unfiltered ("Bad register number for store_inferior routine\n");
 204     }
 205   else
 206     {
 207       for (regno = 0; regno < PC_REGNUM; regno++)
 208         {
 209           /*      regaddr = register_addr (regno, offset); */
 210           errno = 0;
 211           regaddr = offset + regno * sizeof (int);
 212           ptrace (6, inferior_pid,
 213                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 214           if (errno != 0)
 215             {
 216               sprintf (buf, "writing register number %d", regno);
 217               perror_with_name (buf);
 218             }
 219         }
 220       ptrace (6, inferior_pid,
 221               (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register(regno));
 222       ptrace (6, inferior_pid,
 223               (PTRACE_ARG3_TYPE) FPSR_OFFSET,read_register(regno));
 224       ptrace (6, inferior_pid,
 225               (PTRACE_ARG3_TYPE) FPCR_OFFSET,read_register(regno));
 226       ptrace (6,inferior_pid,
 227               (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
 228       ptrace (6,inferior_pid,
 229               (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
 230       ptrace (6,inferior_pid,
 231               (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
 232       if (target_is_m88110)
 233         {
 234           for (regno = X0_REGNUM; regno < NUM_REGS; regno++)
 235             {
 236               X_REGISTER_RAW_TYPE xval;
 237
 238               read_register_bytes(REGISTER_BYTE(regno), (char *)&xval,
 239                                   sizeof(X_REGISTER_RAW_TYPE));
 240               regaddr = XREGADDR(regno);
 241               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 242               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+4), xval.w2);
 243               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+8), xval.w3);
 244               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr+12), xval.w4);
 245             }
 246         }
 247     }
 248 }
 249
 250 /* blockend is the address of the end of the user structure */
 251
 252 m88k_register_u_addr (blockend, regnum)
 253      int blockend, regnum;
 254 {
 255   struct USER u;
 256   int ustart = blockend - sizeof (struct USER);
 257
 258   if (regnum < PSR_REGNUM)
 259       return (ustart + ((int) &u.pt_r0 - (int) &u) +
 260               REGISTER_SIZE * regnum);
 261   else if (regnum == PSR_REGNUM)
 262       return (ustart + ((int) &u.pt_psr) - (int) &u);
 263   else if (regnum == FPSR_REGNUM)
 264       return (ustart + ((int) &u.pt_fpsr) - (int) &u);
 265   else if (regnum == FPCR_REGNUM)
 266       return (ustart + ((int) &u.pt_fpcr) - (int) &u);
 267   else if (regnum == SXIP_REGNUM)
 268       return (ustart + SXIP_OFFSET);
 269   else if (regnum == SNIP_REGNUM)
 270       return (ustart + SNIP_OFFSET);
 271   else if (regnum == SFIP_REGNUM)
 272       return (ustart + SFIP_OFFSET);
 273   else if (target_is_m88110)
 274       return (ustart + ((int) &u.pt_x0 - (int) &u) +   /* Must be X register */
 275                sizeof(u.pt_x0) * (regnum - X0_REGNUM));
 276   else
 277       return (blockend + REGISTER_SIZE * regnum);
 278 }
 279
 280 #ifdef USE_PROC_FS
 281
 282 #include <sys/procfs.h>
 283
 284 /*  Given a pointer to a general register set in /proc format (gregset_t *),
 285     unpack the register contents and supply them as gdb's idea of the current
 286     register values. */
 287
 288 void
 289 supply_gregset (gregsetp)
 290      gregset_t *gregsetp;
 291 {
 292     register int regi;
 293     register greg_t *regp = (greg_t *) gregsetp;
 294
 295     for (regi=0; regi <= SP_REGNUM; regi++)
 296         supply_register (regi, (char *) (regp + regi));
 297
 298     supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
 299     supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
 300     supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
 301     supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
 302     supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 303     supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 304 }
 305
 306 void
 307 fill_gregset (gregsetp, regno)
 308      gregset_t *gregsetp;
 309      int regno;
 310 {
 311     int regi;
 312     register greg_t *regp = (greg_t *) gregsetp;
 313     extern char registers[];
 314
 315     for (regi = 0 ; regi <= R_R31 ; regi++)
 316         if ((regno == -1) || (regno == regi))
 317             *(regp + regi) = *(int *) &registers[REGISTER_BYTE(regi)];
 318
 319     if ((regno == -1) || (regno == SXIP_REGNUM))
 320         *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
 321     if ((regno == -1) || (regno == SNIP_REGNUM))
 322         *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
 323     if ((regno == -1) || (regno == SFIP_REGNUM))
 324         *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
 325     if ((regno == -1) || (regno == PSR_REGNUM))
 326         *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
 327     if ((regno == -1) || (regno == FPSR_REGNUM))
 328         *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
 329     if ((regno == -1) || (regno == FPCR_REGNUM))
 330         *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
 331 }
 332
 333 #endif /* USE_PROC_FS */
 334
 335 /* This support adds the equivalent of adb's % command.  When
 336    the `add-shared-symbol-files' command is given, this routine scans
 337    the dynamic linker's link map and reads the minimal symbols
 338    from each shared object file listed in the map. */
 339
 340 struct link_map {
 341   unsigned long l_addr;         /* address at which object is mapped */
 342   char *l_name;                 /* full name of loaded object */
 343   void *l_ld;                   /* dynamic structure of object */
 344   struct link_map *l_next;      /* next link object */
 345   struct link_map *l_prev;      /* previous link object */
 346 };
 347
 348 #define LINKS_MAP_POINTER "_ld_tail"
 349 #define LIBC_FILE "/usr/lib/libc.so.1"
 350 #define SHARED_OFFSET 0xf0001000
 351
 352 #ifndef PATH_MAX
 353 #define PATH_MAX 1023           /* maximum size of path name on OS */
 354 #endif
 355
 356 void
 357 add_shared_symbol_files ()
 358 {
 359   void *desc;
 360   struct link_map *ld_map, *lm, lms;
 361   struct minimal_symbol *minsym;
 362   struct objfile *objfile;
 363   char *path_name;
 364
 365   if (! inferior_pid)
 366     {
 367       warning ("The program has not yet been started.");
 368       return;
 369     }
 370
 371   objfile = symbol_file_add (LIBC_FILE, 0, 0, 0, 0, 1, 0, 0);
 372   minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
 373
 374   ld_map = (struct link_map *)
 375     read_memory_integer (((int)SYMBOL_VALUE_ADDRESS(minsym) + SHARED_OFFSET), 4);
 376   lm = ld_map;
 377   while (lm)
 378     {
 379       int local_errno = 0;
 380
 381       read_memory ((CORE_ADDR)lm, (char*)&lms, sizeof (struct link_map));
 382       if (lms.l_name)
 383         {
 384           if (target_read_string ((CORE_ADDR)lms.l_name, &path_name,
 385                                   PATH_MAX, &local_errno))
 386             {
 387               symbol_file_add (path_name, 1, lms.l_addr, 0, 0, 0, 0, 0);
 388               free(path_name);
 389             }
 390         }
 391       /* traverse links in reverse order so that we get the
 392          the symbols the user actually gets. */
 393       lm = lms.l_prev;
 394     }
 395
 396   /* Getting new symbols may change our opinion about what is
 397      frameless.  */
 398   reinit_frame_cache ();
 399 }
 400
 401 #if defined(_ES_MP)
 402
 403 #include <sys/regset.h>
 404
 405 unsigned int
 406 m88k_harris_core_register_addr (regno, reg_ptr)
 407      int regno, reg_ptr;
 408 {
 409    unsigned int word_offset;
 410
 411    switch (regno)
 412      {
 413      case PSR_REGNUM:
 414        word_offset = R_EPSR;
 415        break;
 416      case FPSR_REGNUM:
 417        word_offset = R_FPSR;
 418        break;
 419      case FPCR_REGNUM:
 420        word_offset = R_FPCR;
 421        break;
 422      case SXIP_REGNUM:
 423        word_offset = R_EXIP;
 424        break;
 425      case SNIP_REGNUM:
 426        word_offset = R_ENIP;
 427        break;
 428      case SFIP_REGNUM:
 429        word_offset = R_EFIP;
 430        break;
 431      default:
 432        if (regno <= FP_REGNUM)
 433          word_offset = regno;
 434        else
 435          word_offset = ((regno - X0_REGNUM) * 4);
 436      }
 437    return (word_offset * 4);
 438 }
 439
 440 #endif /* _ES_MP */
 441
 442 void
 443 _initialize_m88k_nat()
 444 {
 445 #ifdef _ES_MP
 446    /* Enable 88110 support, as we don't support the 88100 under ES/MP.  */
 447
 448    target_is_m88110 = 1;
 449 #elif defined(_CX_UX)
 450    /* Determine whether we're running on an 88100 or an 88110.  */
 451    target_is_m88110 = (sinfo(SYSMACHINE,0) == SYS5800);
 452 #endif /* _CX_UX */
 453 }
 454
 455 #ifdef _ES_MP
 456 /* Given a pointer to a general register set in /proc format (gregset_t *),
 457    unpack the register contents and supply them as gdb's idea of the current
 458    register values. */
 459
 460 void
 461 supply_gregset (gregsetp)
 462      gregset_t *gregsetp;
 463 {
 464   register int regi;
 465   register greg_t *regp = (greg_t *) gregsetp;
 466
 467   for (regi = 0 ; regi < R_R31 ; regi++)
 468     {
 469       supply_register (regi, (char *) (regp + regi));
 470     }
 471   supply_register (PSR_REGNUM,  (char *) (regp + R_EPSR));
 472   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 473   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 474   supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
 475   supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
 476   supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
 477 }
 478
 479 /* Given a pointer to a floating point register set in /proc format
 480    (fpregset_t *), unpack the register contents and supply them as gdb's
 481    idea of the current floating point register values.  */
 482
 483 void
 484 supply_fpregset (fpregsetp)
 485      fpregset_t *fpregsetp;
 486 {
 487   register int regi;
 488   char *from;
 489
 490   for (regi = FP0_REGNUM ; regi <= FPLAST_REGNUM ; regi++)
 491     {
 492       from = (char *) &((*fpregsetp)[regi-FP0_REGNUM]);
 493       supply_register (regi, from);
 494     }
 495 }
 496
 497 #endif /* _ES_MP */
 498
 499 #ifdef _CX_UX
 500
 501 #include <sys/regset.h>
 502
 503 unsigned int m88k_harris_core_register_addr(int regno, int reg_ptr)
 504 {
 505    unsigned int word_offset;
 506
 507    switch (regno) {
 508     case PSR_REGNUM  : word_offset = R_PSR;  break;
 509     case FPSR_REGNUM : word_offset = R_FPSR; break;
 510     case FPCR_REGNUM : word_offset = R_FPCR; break;
 511     case SXIP_REGNUM : word_offset = R_XIP;  break;
 512     case SNIP_REGNUM : word_offset = R_NIP;  break;
 513     case SFIP_REGNUM : word_offset = R_FIP;  break;
 514     default :
 515       if (regno <= FP_REGNUM)
 516             word_offset = regno;
 517       else
 518             word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
 519    }
 520    return (word_offset * 4);
 521 }
 522
 523 #endif /* _CX_UX */