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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "inferior.h"
  24
  25 #include <sys/types.h>
  26 #include <sys/param.h>
  27 #include <sys/dir.h>
  28 #include <signal.h>
  29 #include "gdbcore.h"
  30 #include <sys/user.h>
  31
  32 #include "bfd.h"
  33 #include "symfile.h"
  34 #include "objfiles.h"
  35 #include "symtab.h"
  36
  37 #ifndef USER                    /* added to support BCS ptrace_user */
  38 #define USER ptrace_user
  39 #endif
  40 #include <sys/ioctl.h>
  41 #include <fcntl.h>
  42 #include <sys/file.h>
  43 #include "gdb_stat.h"
  44
  45 #include "symtab.h"
  46 #include "setjmp.h"
  47 #include "value.h"
  48
  49 #include <sys/ptrace.h>
  50
  51 /* CX/UX provides them already, but as word offsets instead of char offsets */
  52 #define SXIP_OFFSET (PT_SXIP * 4)
  53 #define SNIP_OFFSET (PT_SNIP * 4)
  54 #define SFIP_OFFSET (PT_SFIP * 4)
  55 #define PSR_OFFSET  (PT_PSR  * sizeof(int))
  56 #define FPSR_OFFSET (PT_FPSR * sizeof(int))
  57 #define FPCR_OFFSET (PT_FPCR * sizeof(int))
  58
  59 #define XREGADDR(r) (((char *)&u.pt_x0-(char *)&u) + \
  60                      ((r)-X0_REGNUM)*sizeof(X_REGISTER_RAW_TYPE))
  61
  62 extern int have_symbol_file_p ();
  63
  64 extern jmp_buf stack_jmp;
  65
  66 extern int errno;
  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 /* Prototypes for supply_gregset etc. */
 285 #include "gregset.h"
 286
 287 /*  Given a pointer to a general register set in /proc format (gregset_t *),
 288    unpack the register contents and supply them as gdb's idea of the current
 289    register values. */
 290
 291 void
 292 supply_gregset (gregsetp)
 293      gregset_t *gregsetp;
 294 {
 295   register int regi;
 296   register greg_t *regp = (greg_t *) gregsetp;
 297
 298   for (regi = 0; regi <= SP_REGNUM; regi++)
 299     supply_register (regi, (char *) (regp + regi));
 300
 301   supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
 302   supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
 303   supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
 304   supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
 305   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 306   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 307 }
 308
 309 void
 310 fill_gregset (gregsetp, regno)
 311      gregset_t *gregsetp;
 312      int regno;
 313 {
 314   int regi;
 315   register greg_t *regp = (greg_t *) gregsetp;
 316
 317   for (regi = 0; regi <= R_R31; regi++)
 318     if ((regno == -1) || (regno == regi))
 319       *(regp + regi) = *(int *) &registers[REGISTER_BYTE (regi)];
 320
 321   if ((regno == -1) || (regno == SXIP_REGNUM))
 322     *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE (SXIP_REGNUM)];
 323   if ((regno == -1) || (regno == SNIP_REGNUM))
 324     *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE (SNIP_REGNUM)];
 325   if ((regno == -1) || (regno == SFIP_REGNUM))
 326     *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE (SFIP_REGNUM)];
 327   if ((regno == -1) || (regno == PSR_REGNUM))
 328     *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE (PSR_REGNUM)];
 329   if ((regno == -1) || (regno == FPSR_REGNUM))
 330     *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE (FPSR_REGNUM)];
 331   if ((regno == -1) || (regno == FPCR_REGNUM))
 332     *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE (FPCR_REGNUM)];
 333 }
 334
 335 #endif /* USE_PROC_FS */
 336
 337 /* This support adds the equivalent of adb's % command.  When
 338    the `add-shared-symbol-files' command is given, this routine scans
 339    the dynamic linker's link map and reads the minimal symbols
 340    from each shared object file listed in the map. */
 341
 342 struct link_map
 343 {
 344   unsigned long l_addr;         /* address at which object is mapped */
 345   char *l_name;                 /* full name of loaded object */
 346   void *l_ld;                   /* dynamic structure of object */
 347   struct link_map *l_next;      /* next link object */
 348   struct link_map *l_prev;      /* previous link object */
 349 };
 350
 351 #define LINKS_MAP_POINTER "_ld_tail"
 352 #define LIBC_FILE "/usr/lib/libc.so.1"
 353 #define SHARED_OFFSET 0xf0001000
 354
 355 #ifndef PATH_MAX
 356 #define PATH_MAX 1023           /* maximum size of path name on OS */
 357 #endif
 358
 359 void
 360 add_shared_symbol_files ()
 361 {
 362   void *desc;
 363   struct link_map *ld_map, *lm, lms;
 364   struct minimal_symbol *minsym;
 365   struct objfile *objfile;
 366   char *path_name;
 367
 368   if (!inferior_pid)
 369     {
 370       warning ("The program has not yet been started.");
 371       return;
 372     }
 373
 374   objfile = symbol_file_add (LIBC_FILE, 0, NULL, 0, OBJF_READNOW);
 375   minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
 376
 377   ld_map = (struct link_map *)
 378     read_memory_integer (((int) SYMBOL_VALUE_ADDRESS (minsym) + SHARED_OFFSET), 4);
 379   lm = ld_map;
 380   while (lm)
 381     {
 382       int local_errno = 0;
 383
 384       read_memory ((CORE_ADDR) lm, (char *) &lms, sizeof (struct link_map));
 385       if (lms.l_name)
 386         {
 387           if (target_read_string ((CORE_ADDR) lms.l_name, &path_name,
 388                                   PATH_MAX, &local_errno))
 389             {
 390               struct section_addr_info section_addrs;
 391               memset (&section_addrs, 0, sizeof (section_addrs));
 392               section_addrs.other[0].addr = lms.l_addr;
 393               section_addrs.other[0].name = ".text";
 394               symbol_file_add (path_name, 1, &section_addrs, 0, 0);
 395               free (path_name);
 396             }
 397         }
 398       /* traverse links in reverse order so that we get the
 399          the symbols the user actually gets. */
 400       lm = lms.l_prev;
 401     }
 402
 403   /* Getting new symbols may change our opinion about what is
 404      frameless.  */
 405   reinit_frame_cache ();
 406 }
 407
 408 #if defined(_ES_MP)
 409
 410 #include <sys/regset.h>
 411
 412 unsigned int
 413 m88k_harris_core_register_addr (regno, reg_ptr)
 414      int regno, reg_ptr;
 415 {
 416   unsigned int word_offset;
 417
 418   switch (regno)
 419     {
 420     case PSR_REGNUM:
 421       word_offset = R_EPSR;
 422       break;
 423     case FPSR_REGNUM:
 424       word_offset = R_FPSR;
 425       break;
 426     case FPCR_REGNUM:
 427       word_offset = R_FPCR;
 428       break;
 429     case SXIP_REGNUM:
 430       word_offset = R_EXIP;
 431       break;
 432     case SNIP_REGNUM:
 433       word_offset = R_ENIP;
 434       break;
 435     case SFIP_REGNUM:
 436       word_offset = R_EFIP;
 437       break;
 438     default:
 439       if (regno <= FP_REGNUM)
 440         word_offset = regno;
 441       else
 442         word_offset = ((regno - X0_REGNUM) * 4);
 443     }
 444   return (word_offset * 4);
 445 }
 446
 447 #endif /* _ES_MP */
 448
 449 void
 450 _initialize_m88k_nat ()
 451 {
 452 #ifdef _ES_MP
 453   /* Enable 88110 support, as we don't support the 88100 under ES/MP.  */
 454
 455   target_is_m88110 = 1;
 456 #elif defined(_CX_UX)
 457   /* Determine whether we're running on an 88100 or an 88110.  */
 458   target_is_m88110 = (sinfo (SYSMACHINE, 0) == SYS5800);
 459 #endif /* _CX_UX */
 460 }
 461
 462 #ifdef _ES_MP
 463 /* Given a pointer to a general register set in /proc format (gregset_t *),
 464    unpack the register contents and supply them as gdb's idea of the current
 465    register values. */
 466
 467 void
 468 supply_gregset (gregsetp)
 469      gregset_t *gregsetp;
 470 {
 471   register int regi;
 472   register greg_t *regp = (greg_t *) gregsetp;
 473
 474   for (regi = 0; regi < R_R31; regi++)
 475     {
 476       supply_register (regi, (char *) (regp + regi));
 477     }
 478   supply_register (PSR_REGNUM, (char *) (regp + R_EPSR));
 479   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 480   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 481   supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
 482   supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
 483   supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
 484 }
 485
 486 /* Given a pointer to a floating point register set in /proc format
 487    (fpregset_t *), unpack the register contents and supply them as gdb's
 488    idea of the current floating point register values.  */
 489
 490 void
 491 supply_fpregset (fpregsetp)
 492      fpregset_t *fpregsetp;
 493 {
 494   register int regi;
 495   char *from;
 496
 497   for (regi = FP0_REGNUM; regi <= FPLAST_REGNUM; regi++)
 498     {
 499       from = (char *) &((*fpregsetp)[regi - FP0_REGNUM]);
 500       supply_register (regi, from);
 501     }
 502 }
 503
 504 #endif /* _ES_MP */
 505
 506 #ifdef _CX_UX
 507
 508 #include <sys/regset.h>
 509
 510 unsigned int
 511 m88k_harris_core_register_addr (int regno, int reg_ptr)
 512 {
 513   unsigned int word_offset;
 514
 515   switch (regno)
 516     {
 517     case PSR_REGNUM:
 518       word_offset = R_PSR;
 519       break;
 520     case FPSR_REGNUM:
 521       word_offset = R_FPSR;
 522       break;
 523     case FPCR_REGNUM:
 524       word_offset = R_FPCR;
 525       break;
 526     case SXIP_REGNUM:
 527       word_offset = R_XIP;
 528       break;
 529     case SNIP_REGNUM:
 530       word_offset = R_NIP;
 531       break;
 532     case SFIP_REGNUM:
 533       word_offset = R_FIP;
 534       break;
 535     default:
 536       if (regno <= FP_REGNUM)
 537         word_offset = regno;
 538       else
 539         word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
 540     }
 541   return (word_offset * 4);
 542 }
 543
 544 #endif /* _CX_UX */