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 (int regno)
  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 (int regno)
 142 {
 143   register unsigned int regaddr;
 144   char buf[80];
 145
 146   struct USER u;
 147
 148   unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
 149
 150   regaddr = offset;
 151
 152   /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
 153      svr3 doesn't run on an 88110, or the kernel isolates the different (not
 154      completely sure this is true, but seems to be.  */
 155   if (regno >= 0)
 156     {
 157       /*      regaddr = register_addr (regno, offset); */
 158       if (regno < PC_REGNUM)
 159         {
 160           regaddr = offset + regno * sizeof (int);
 161           errno = 0;
 162           ptrace (6, inferior_pid,
 163                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 164           if (errno != 0)
 165             {
 166               sprintf (buf, "writing register number %d", regno);
 167               perror_with_name (buf);
 168             }
 169         }
 170       else if (regno == PSR_REGNUM)
 171         ptrace (6, inferior_pid,
 172                 (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
 173       else if (regno == FPSR_REGNUM)
 174         ptrace (6, inferior_pid,
 175                 (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
 176       else if (regno == FPCR_REGNUM)
 177         ptrace (6, inferior_pid,
 178                 (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
 179       else if (regno == SXIP_REGNUM)
 180         ptrace (6, inferior_pid,
 181                 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
 182       else if (regno == SNIP_REGNUM)
 183         ptrace (6, inferior_pid,
 184                 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
 185       else if (regno == SFIP_REGNUM)
 186         ptrace (6, inferior_pid,
 187                 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
 188       else if (target_is_m88110 && regno < NUM_REGS)
 189         {
 190           X_REGISTER_RAW_TYPE xval;
 191
 192           read_register_bytes (REGISTER_BYTE (regno), (char *) &xval,
 193                                sizeof (X_REGISTER_RAW_TYPE));
 194           regaddr = XREGADDR (regno);
 195           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 196           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 4, xval.w2);
 197           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 8, xval.w3);
 198           ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr + 12, xval.w4);
 199         }
 200       else
 201         printf_unfiltered ("Bad register number for store_inferior routine\n");
 202     }
 203   else
 204     {
 205       for (regno = 0; regno < PC_REGNUM; regno++)
 206         {
 207           /*      regaddr = register_addr (regno, offset); */
 208           errno = 0;
 209           regaddr = offset + regno * sizeof (int);
 210           ptrace (6, inferior_pid,
 211                   (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
 212           if (errno != 0)
 213             {
 214               sprintf (buf, "writing register number %d", regno);
 215               perror_with_name (buf);
 216             }
 217         }
 218       ptrace (6, inferior_pid,
 219               (PTRACE_ARG3_TYPE) PSR_OFFSET, read_register (regno));
 220       ptrace (6, inferior_pid,
 221               (PTRACE_ARG3_TYPE) FPSR_OFFSET, read_register (regno));
 222       ptrace (6, inferior_pid,
 223               (PTRACE_ARG3_TYPE) FPCR_OFFSET, read_register (regno));
 224       ptrace (6, inferior_pid,
 225               (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
 226       ptrace (6, inferior_pid,
 227               (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
 228       ptrace (6, inferior_pid,
 229               (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
 230       if (target_is_m88110)
 231         {
 232           for (regno = X0_REGNUM; regno < NUM_REGS; regno++)
 233             {
 234               X_REGISTER_RAW_TYPE xval;
 235
 236               read_register_bytes (REGISTER_BYTE (regno), (char *) &xval,
 237                                    sizeof (X_REGISTER_RAW_TYPE));
 238               regaddr = XREGADDR (regno);
 239               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, xval.w1);
 240               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 4), xval.w2);
 241               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 8), xval.w3);
 242               ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) (regaddr + 12), xval.w4);
 243             }
 244         }
 245     }
 246 }
 247
 248 /* blockend is the address of the end of the user structure */
 249
 250 m88k_register_u_addr (int blockend, int regnum)
 251 {
 252   struct USER u;
 253   int ustart = blockend - sizeof (struct USER);
 254
 255   if (regnum < PSR_REGNUM)
 256     return (ustart + ((int) &u.pt_r0 - (int) &u) +
 257             REGISTER_SIZE * regnum);
 258   else if (regnum == PSR_REGNUM)
 259     return (ustart + ((int) &u.pt_psr) - (int) &u);
 260   else if (regnum == FPSR_REGNUM)
 261     return (ustart + ((int) &u.pt_fpsr) - (int) &u);
 262   else if (regnum == FPCR_REGNUM)
 263     return (ustart + ((int) &u.pt_fpcr) - (int) &u);
 264   else if (regnum == SXIP_REGNUM)
 265     return (ustart + SXIP_OFFSET);
 266   else if (regnum == SNIP_REGNUM)
 267     return (ustart + SNIP_OFFSET);
 268   else if (regnum == SFIP_REGNUM)
 269     return (ustart + SFIP_OFFSET);
 270   else if (target_is_m88110)
 271     return (ustart + ((int) &u.pt_x0 - (int) &u) +      /* Must be X register */
 272             sizeof (u.pt_x0) * (regnum - X0_REGNUM));
 273   else
 274     return (blockend + REGISTER_SIZE * regnum);
 275 }
 276
 277 #ifdef USE_PROC_FS
 278
 279 #include <sys/procfs.h>
 280
 281 /* Prototypes for supply_gregset etc. */
 282 #include "gregset.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 (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 (gregset_t *gregsetp, int regno)
 307 {
 308   int regi;
 309   register greg_t *regp = (greg_t *) gregsetp;
 310
 311   for (regi = 0; regi <= R_R31; regi++)
 312     if ((regno == -1) || (regno == regi))
 313       *(regp + regi) = *(int *) &registers[REGISTER_BYTE (regi)];
 314
 315   if ((regno == -1) || (regno == SXIP_REGNUM))
 316     *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE (SXIP_REGNUM)];
 317   if ((regno == -1) || (regno == SNIP_REGNUM))
 318     *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE (SNIP_REGNUM)];
 319   if ((regno == -1) || (regno == SFIP_REGNUM))
 320     *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE (SFIP_REGNUM)];
 321   if ((regno == -1) || (regno == PSR_REGNUM))
 322     *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE (PSR_REGNUM)];
 323   if ((regno == -1) || (regno == FPSR_REGNUM))
 324     *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE (FPSR_REGNUM)];
 325   if ((regno == -1) || (regno == FPCR_REGNUM))
 326     *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE (FPCR_REGNUM)];
 327 }
 328
 329 #endif /* USE_PROC_FS */
 330
 331 /* This support adds the equivalent of adb's % command.  When
 332    the `add-shared-symbol-files' command is given, this routine scans
 333    the dynamic linker's link map and reads the minimal symbols
 334    from each shared object file listed in the map. */
 335
 336 struct link_map
 337 {
 338   unsigned long l_addr;         /* address at which object is mapped */
 339   char *l_name;                 /* full name of loaded object */
 340   void *l_ld;                   /* dynamic structure of object */
 341   struct link_map *l_next;      /* next link object */
 342   struct link_map *l_prev;      /* previous link object */
 343 };
 344
 345 #define LINKS_MAP_POINTER "_ld_tail"
 346 #define LIBC_FILE "/usr/lib/libc.so.1"
 347 #define SHARED_OFFSET 0xf0001000
 348
 349 #ifndef PATH_MAX
 350 #define PATH_MAX 1023           /* maximum size of path name on OS */
 351 #endif
 352
 353 void
 354 add_shared_symbol_files (void)
 355 {
 356   void *desc;
 357   struct link_map *ld_map, *lm, lms;
 358   struct minimal_symbol *minsym;
 359   struct objfile *objfile;
 360   char *path_name;
 361
 362   if (!inferior_pid)
 363     {
 364       warning ("The program has not yet been started.");
 365       return;
 366     }
 367
 368   objfile = symbol_file_add (LIBC_FILE, 0, NULL, 0, OBJF_READNOW);
 369   minsym = lookup_minimal_symbol (LINKS_MAP_POINTER, objfile);
 370
 371   ld_map = (struct link_map *)
 372     read_memory_integer (((int) SYMBOL_VALUE_ADDRESS (minsym) + SHARED_OFFSET), 4);
 373   lm = ld_map;
 374   while (lm)
 375     {
 376       int local_errno = 0;
 377
 378       read_memory ((CORE_ADDR) lm, (char *) &lms, sizeof (struct link_map));
 379       if (lms.l_name)
 380         {
 381           if (target_read_string ((CORE_ADDR) lms.l_name, &path_name,
 382                                   PATH_MAX, &local_errno))
 383             {
 384               struct section_addr_info section_addrs;
 385               memset (&section_addrs, 0, sizeof (section_addrs));
 386               section_addrs.other[0].addr = lms.l_addr;
 387               section_addrs.other[0].name = ".text";
 388               symbol_file_add (path_name, 1, &section_addrs, 0, 0);
 389               free (path_name);
 390             }
 391         }
 392       /* traverse links in reverse order so that we get the
 393          the symbols the user actually gets. */
 394       lm = lms.l_prev;
 395     }
 396
 397   /* Getting new symbols may change our opinion about what is
 398      frameless.  */
 399   reinit_frame_cache ();
 400 }
 401
 402 #if defined(_ES_MP)
 403
 404 #include <sys/regset.h>
 405
 406 unsigned int
 407 m88k_harris_core_register_addr (int regno, int 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 (void)
 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 (gregset_t *gregsetp)
 462 {
 463   register int regi;
 464   register greg_t *regp = (greg_t *) gregsetp;
 465
 466   for (regi = 0; regi < R_R31; regi++)
 467     {
 468       supply_register (regi, (char *) (regp + regi));
 469     }
 470   supply_register (PSR_REGNUM, (char *) (regp + R_EPSR));
 471   supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
 472   supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
 473   supply_register (SXIP_REGNUM, (char *) (regp + R_EXIP));
 474   supply_register (SNIP_REGNUM, (char *) (regp + R_ENIP));
 475   supply_register (SFIP_REGNUM, (char *) (regp + R_EFIP));
 476 }
 477
 478 /* Given a pointer to a floating point register set in /proc format
 479    (fpregset_t *), unpack the register contents and supply them as gdb's
 480    idea of the current floating point register values.  */
 481
 482 void
 483 supply_fpregset (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
 502 m88k_harris_core_register_addr (int regno, int reg_ptr)
 503 {
 504   unsigned int word_offset;
 505
 506   switch (regno)
 507     {
 508     case PSR_REGNUM:
 509       word_offset = R_PSR;
 510       break;
 511     case FPSR_REGNUM:
 512       word_offset = R_FPSR;
 513       break;
 514     case FPCR_REGNUM:
 515       word_offset = R_FPCR;
 516       break;
 517     case SXIP_REGNUM:
 518       word_offset = R_XIP;
 519       break;
 520     case SNIP_REGNUM:
 521       word_offset = R_NIP;
 522       break;
 523     case SFIP_REGNUM:
 524       word_offset = R_FIP;
 525       break;
 526     default:
 527       if (regno <= FP_REGNUM)
 528         word_offset = regno;
 529       else
 530         word_offset = ((regno - X0_REGNUM) * 4) + R_X0;
 531     }
 532   return (word_offset * 4);
 533 }
 534
 535 #endif /* _CX_UX */