gdb/cxux-nat.c

   1 /* Native support for Motorola 88k running Harris CX/UX.
   2    Copyright 1988, 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000,
   3    2001 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "frame.h"
  24 #include "inferior.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/param.h>
  28 #include <sys/dir.h>
  29 #include <signal.h>
  30 #include "gdbcore.h"
  31 #include <sys/user.h>
  32
  33 #include "bfd.h"
  34 #include "symfile.h"
  35 #include "objfiles.h"
  36 #include "symtab.h"
  37 #include "regcache.h"
  38
  39 #ifndef USER                    /* added to support BCS ptrace_user */
  40 #define USER ptrace_user
  41 #endif
  42 #include <sys/ioctl.h>
  43 #include <fcntl.h>
  44 #include <sys/file.h>
  45 #include "gdb_stat.h"
  46
  47 #include "symtab.h"
  48 #include "setjmp.h"
  49 #include "value.h"
  50
  51 #include <sys/ptrace.h>
  52
  53 /* CX/UX provides them already, but as word offsets instead of char offsets */
  54 #define SXIP_OFFSET (PT_SXIP * 4)
  55 #define SNIP_OFFSET (PT_SNIP * 4)
  56 #define SFIP_OFFSET (PT_SFIP * 4)
  57 #define PSR_OFFSET  (PT_PSR  * sizeof(int))
  58 #define FPSR_OFFSET (PT_FPSR * sizeof(int))
  59 #define FPCR_OFFSET (PT_FPCR * sizeof(int))
  60
  61 #define XREGADDR(r) (((char *)&u.pt_x0-(char *)&u) + \
  62                      ((r)-X0_REGNUM)*sizeof(X_REGISTER_RAW_TYPE))
  63
  64 extern int have_symbol_file_p ();
  65
  66 extern jmp_buf stack_jmp;
  67
  68 extern int errno;
  69
  70 void
  71 fetch_inferior_registers (int regno)
  72 {
  73   register unsigned int regaddr;
  74   char buf[MAX_REGISTER_RAW_SIZE];
  75   register int i;
  76
  77   struct USER u;
  78   unsigned int offset;
  79
  80   offset = (char *) &u.pt_r0 - (char *) &u;
  81   regaddr = offset;             /* byte offset to r0; */
  82
  83 /*  offset = ptrace (3, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
  84   for (regno = 0; regno < PC_REGNUM; regno++)
  85     {
  86       /*regaddr = register_addr (regno, offset); */
  87       /* 88k enhancement  */
  88
  89       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  90         {
  91           *(int *) &buf[i] = ptrace (3, PIDGET (inferior_ptid),
  92                                      (PTRACE_ARG3_TYPE) regaddr, 0);
  93           regaddr += sizeof (int);
  94         }
  95       supply_register (regno, buf);
  96     }
  97   /* now load up registers 32-37; special pc registers */
  98   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
  99                              (PTRACE_ARG3_TYPE) PSR_OFFSET, 0);
 100   supply_register (PSR_REGNUM, buf);
 101   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
 102                              (PTRACE_ARG3_TYPE) FPSR_OFFSET, 0);
 103   supply_register (FPSR_REGNUM, buf);
 104   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
 105                              (PTRACE_ARG3_TYPE) FPCR_OFFSET, 0);
 106   supply_register (FPCR_REGNUM, buf);
 107   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
 108                              (PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
 109   supply_register (SXIP_REGNUM, buf);
 110   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
 111                              (PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
 112   supply_register (SNIP_REGNUM, buf);
 113   *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
 114                              (PTRACE_ARG3_TYPE) SFIP_OFFSET, 0);
 115   supply_register (SFIP_REGNUM, buf);
 116
 117   if (target_is_m88110)
 118     {
 119       for (regaddr = XREGADDR (X0_REGNUM), regno = X0_REGNUM;
 120            regno < NUM_REGS;
 121            regno++, regaddr += 16)
 122         {
 123           X_REGISTER_RAW_TYPE xval;
 124
 125           *(int *) &xval.w1 = ptrace (3, PIDGET (inferior_ptid),
 126                                       (PTRACE_ARG3_TYPE) regaddr, 0);
 127           *(int *) &xval.w2 = ptrace (3, PIDGET (inferior_ptid),
 128                                       (PTRACE_ARG3_TYPE) (regaddr + 4), 0);
 129           *(int *) &xval.w3 = ptrace (3, PIDGET (inferior_ptid),
 130                                       (PTRACE_ARG3_TYPE) (regaddr + 8), 0);
 131           *(int *) &xval.w4 = ptrace (3, PIDGET (inferior_ptid),
 132                                       (PTRACE_ARG3_TYPE) (regaddr + 12), 0);
 133           supply_register (regno, (void *) &xval);
 134         }
 135     }
 136 }
 137
 138 /* Store our register values back into the inferior.
 139    If REGNO is -1, do this for all registers.
 140    Otherwise, REGNO specifies which register (so we can save time).  */
 141
 142 void
 143 store_inferior_registers (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, PIDGET (inferior_ptid),
 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, PIDGET (inferior_ptid),
 174                 (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
 175       else if (regno == FPSR_REGNUM)
 176         ptrace (6, PIDGET (inferior_ptid),
 177                 (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
 178       else if (regno == FPCR_REGNUM)
 179         ptrace (6, PIDGET (inferior_ptid),
 180                 (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
 181       else if (regno == SXIP_REGNUM)
 182         ptrace (6, PIDGET (inferior_ptid),
 183                 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
 184       else if (regno == SNIP_REGNUM)
 185         ptrace (6, PIDGET (inferior_ptid),
 186                 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
 187       else if (regno == SFIP_REGNUM)
 188         ptrace (6, PIDGET (inferior_ptid),
 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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 198           ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr + 4, xval.w2);
 199           ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr + 8, xval.w3);
 200           ptrace (6, PIDGET (inferior_ptid), (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, PIDGET (inferior_ptid),
 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, PIDGET (inferior_ptid),
 221               (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
 222       ptrace (6, PIDGET (inferior_ptid),
 223               (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
 224       ptrace (6, PIDGET (inferior_ptid),
 225               (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
 226       ptrace (6, PIDGET (inferior_ptid),
 227               (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
 228       ptrace (6, PIDGET (inferior_ptid),
 229               (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
 230       ptrace (6, PIDGET (inferior_ptid),
 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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 242               ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) (regaddr + 4), xval.w2);
 243               ptrace (6, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) (regaddr + 8), xval.w3);
 244               ptrace (6, PIDGET (inferior_ptid), (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 (int blockend, int 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 /* Prototypes for supply_gregset etc. */
 284 #include "gregset.h"
 285
 286 /*  Given a pointer to a general register set in /proc format (gregset_t *),
 287    unpack the register contents and supply them as gdb's idea of the current
 288    register values. */
 289
 290 void
 291 supply_gregset (gregset_t *gregsetp)
 292 {
 293   register int regi;
 294   register greg_t *regp = (greg_t *) gregsetp;
 295
 296   for (regi = 0; regi <= SP_REGNUM; regi++)
 297     supply_register (regi, (char *) (regp + regi));
 298
 299   supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
 300   supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
 301   supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
 302   supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
 303   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 304   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 305 }
 306
 307 void
 308 fill_gregset (gregset_t *gregsetp, 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 {
 340   unsigned long l_addr;         /* address at which object is mapped */
 341   char *l_name;                 /* full name of loaded object */
 342   void *l_ld;                   /* dynamic structure of object */
 343   struct link_map *l_next;      /* next link object */
 344   struct link_map *l_prev;      /* previous link object */
 345 };
 346
 347 #define LINKS_MAP_POINTER "_ld_tail"
 348 #define LIBC_FILE "/usr/lib/libc.so.1"
 349 #define SHARED_OFFSET 0xf0001000
 350
 351 #ifndef PATH_MAX
 352 #define PATH_MAX 1023           /* maximum size of path name on OS */
 353 #endif
 354
 355 void
 356 add_shared_symbol_files (void)
 357 {
 358   void *desc;
 359   struct link_map *ld_map, *lm, lms;
 360   struct minimal_symbol *minsym;
 361   struct objfile *objfile;
 362   char *path_name;
 363
 364   if (ptid_equal (inferior_ptid, null_ptid))
 365     {
 366       warning ("The program has not yet been started.");
 367       return;
 368     }
 369
 370   objfile = symbol_file_add (LIBC_FILE, 0, NULL, 0, OBJF_READNOW);
 371   minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
 372
 373   ld_map = (struct link_map *)
 374     read_memory_integer (((int) SYMBOL_VALUE_ADDRESS (minsym) + SHARED_OFFSET), 4);
 375   lm = ld_map;
 376   while (lm)
 377     {
 378       int local_errno = 0;
 379
 380       read_memory ((CORE_ADDR) lm, (char *) &lms, sizeof (struct link_map));
 381       if (lms.l_name)
 382         {
 383           if (target_read_string ((CORE_ADDR) lms.l_name, &path_name,
 384                                   PATH_MAX, &local_errno))
 385             {
 386               struct section_addr_info section_addrs;
 387               memset (&section_addrs, 0, sizeof (section_addrs));
 388               section_addrs.other[0].addr = lms.l_addr;
 389               section_addrs.other[0].name = ".text";
 390               symbol_file_add (path_name, 1, &section_addrs, 0, 0);
 391               xfree (path_name);
 392             }
 393         }
 394       /* traverse links in reverse order so that we get the
 395          the symbols the user actually gets. */
 396       lm = lms.l_prev;
 397     }
 398
 399   /* Getting new symbols may change our opinion about what is
 400      frameless.  */
 401   reinit_frame_cache ();
 402 }
 403
 404 #if defined(_ES_MP)
 405
 406 #include <sys/regset.h>
 407
 408 unsigned int
 409 m88k_harris_core_register_addr (int regno, int reg_ptr)
 410 {
 411   unsigned int word_offset;
 412
 413   switch (regno)
 414     {
 415     case PSR_REGNUM:
 416       word_offset = R_EPSR;
 417       break;
 418     case FPSR_REGNUM:
 419       word_offset = R_FPSR;
 420       break;
 421     case FPCR_REGNUM:
 422       word_offset = R_FPCR;
 423       break;
 424     case SXIP_REGNUM:
 425       word_offset = R_EXIP;
 426       break;
 427     case SNIP_REGNUM:
 428       word_offset = R_ENIP;
 429       break;
 430     case SFIP_REGNUM:
 431       word_offset = R_EFIP;
 432       break;
 433     default:
 434       if (regno <= FP_REGNUM)
 435         word_offset = regno;
 436       else
 437         word_offset = ((regno - X0_REGNUM) * 4);
 438     }
 439   return (word_offset * 4);
 440 }
 441
 442 #endif /* _ES_MP */
 443
 444 void
 445 _initialize_m88k_nat (void)
 446 {
 447 #ifdef _ES_MP
 448   /* Enable 88110 support, as we don't support the 88100 under ES/MP.  */
 449
 450   target_is_m88110 = 1;
 451 #elif defined(_CX_UX)
 452   /* Determine whether we're running on an 88100 or an 88110.  */
 453   target_is_m88110 = (sinfo (SYSMACHINE, 0) == SYS5800);
 454 #endif /* _CX_UX */
 455 }
 456
 457 #ifdef _ES_MP
 458 /* Given a pointer to a general register set in /proc format (gregset_t *),
 459    unpack the register contents and supply them as gdb's idea of the current
 460    register values. */
 461
 462 void
 463 supply_gregset (gregset_t *gregsetp)
 464 {
 465   register int regi;
 466   register greg_t *regp = (greg_t *) gregsetp;
 467
 468   for (regi = 0; regi < R_R31; regi++)
 469     {
 470       supply_register (regi, (char *) (regp + regi));
 471     }
 472   supply_register (PSR_REGNUM, (char *) (regp + R_EPSR));
 473   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 474   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 475   supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
 476   supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
 477   supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
 478 }
 479
 480 /* Given a pointer to a floating point register set in /proc format
 481    (fpregset_t *), unpack the register contents and supply them as gdb's
 482    idea of the current floating point register values.  */
 483
 484 void
 485 supply_fpregset (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
 504 m88k_harris_core_register_addr (int regno, int reg_ptr)
 505 {
 506   unsigned int word_offset;
 507
 508   switch (regno)
 509     {
 510     case PSR_REGNUM:
 511       word_offset = R_PSR;
 512       break;
 513     case FPSR_REGNUM:
 514       word_offset = R_FPSR;
 515       break;
 516     case FPCR_REGNUM:
 517       word_offset = R_FPCR;
 518       break;
 519     case SXIP_REGNUM:
 520       word_offset = R_XIP;
 521       break;
 522     case SNIP_REGNUM:
 523       word_offset = R_NIP;
 524       break;
 525     case SFIP_REGNUM:
 526       word_offset = R_FIP;
 527       break;
 528     default:
 529       if (regno <= FP_REGNUM)
 530         word_offset = regno;
 531       else
 532         word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
 533     }
 534   return (word_offset * 4);
 535 }
 536
 537 #endif /* _CX_UX */