1 /* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and 2 EVAX (openVMS/Alpha) files. 3 Copyright (C) 1996-2016 Free Software Foundation, Inc. 4 5 Miscellaneous functions. 6 7 Written by Klaus K"ampf (kkaempf (at) rmi.de) 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #if __STDC__ 25 #include <stdarg.h> 26 #endif 27 28 #include "sysdep.h" 29 #include "bfd.h" 30 #include "bfdlink.h" 31 #include "libbfd.h" 32 #include "safe-ctype.h" 33 34 #ifdef VMS 35 #define __NEW_STARLET 36 #include <rms.h> 37 #include <unixlib.h> 38 #include <gen64def.h> 39 #include <starlet.h> 40 #define RME$C_SETRFM 0x00000001 41 #include <unistd.h> 42 #endif 43 #include <time.h> 44 45 #include "vms.h" 46 #include "vms/emh.h" 47 48 #if VMS_DEBUG 49 /* Debug functions. */ 50 51 /* Debug function for all vms extensions evaluates environment 52 variable VMS_DEBUG for a numerical value on the first call all 53 error levels below this value are printed: 54 55 Levels: 56 1 toplevel bfd calls (functions from the bfd vector) 57 2 functions called by bfd calls 58 ... 59 9 almost everything 60 61 Level is also indentation level. Indentation is performed 62 if level > 0. */ 63 64 void 65 _bfd_vms_debug (int level, char *format, ...) 66 { 67 static int min_level = -1; 68 static FILE *output = NULL; 69 char *eptr; 70 va_list args; 71 int abslvl = (level > 0) ? level : - level; 72 73 if (min_level == -1) 74 { 75 if ((eptr = getenv ("VMS_DEBUG")) != NULL) 76 { 77 min_level = atoi (eptr); 78 output = stderr; 79 } 80 else 81 min_level = 0; 82 } 83 if (output == NULL) 84 return; 85 if (abslvl > min_level) 86 return; 87 88 while (--level > 0) 89 fprintf (output, " "); 90 va_start (args, format); 91 vfprintf (output, format, args); 92 fflush (output); 93 va_end (args); 94 } 95 96 /* A debug function 97 hex dump 'size' bytes starting at 'ptr'. */ 98 99 void 100 _bfd_hexdump (int level, unsigned char *ptr, int size, int offset) 101 { 102 unsigned char *lptr = ptr; 103 int count = 0; 104 long start = offset; 105 106 while (size-- > 0) 107 { 108 if ((count % 16) == 0) 109 vms_debug (level, "%08lx:", start); 110 vms_debug (-level, " %02x", *ptr++); 111 count++; 112 start++; 113 if (size == 0) 114 { 115 while ((count % 16) != 0) 116 { 117 vms_debug (-level, " "); 118 count++; 119 } 120 } 121 if ((count % 16) == 0) 122 { 123 vms_debug (-level, " "); 124 while (lptr < ptr) 125 { 126 vms_debug (-level, "%c", (*lptr < 32) ? '.' : *lptr); 127 lptr++; 128 } 129 vms_debug (-level, "\n"); 130 } 131 } 132 if ((count % 16) != 0) 133 vms_debug (-level, "\n"); 134 } 135 #endif 136 137 139 /* Copy sized string (string with fixed size) to new allocated area 140 size is string size (size of record) */ 141 142 char * 143 _bfd_vms_save_sized_string (unsigned char *str, int size) 144 { 145 char *newstr = bfd_malloc ((bfd_size_type) size + 1); 146 147 if (newstr == NULL) 148 return NULL; 149 memcpy (newstr, (char *) str, (size_t) size); 150 newstr[size] = 0; 151 152 return newstr; 153 } 154 155 /* Copy counted string (string with size at first byte) to new allocated area 156 ptr points to size byte on entry */ 157 158 char * 159 _bfd_vms_save_counted_string (unsigned char *ptr) 160 { 161 int len = *ptr++; 162 163 return _bfd_vms_save_sized_string (ptr, len); 164 } 165 166 /* Object output routines. */ 168 169 /* Begin new record. 170 Write 2 bytes rectype and 2 bytes record length. */ 171 172 void 173 _bfd_vms_output_begin (struct vms_rec_wr *recwr, int rectype) 174 { 175 vms_debug2 ((6, "_bfd_vms_output_begin (type %d)\n", rectype)); 176 177 /* Record must have been closed. */ 178 BFD_ASSERT (recwr->size == 0); 179 180 _bfd_vms_output_short (recwr, (unsigned int) rectype); 181 182 /* Placeholder for length. */ 183 _bfd_vms_output_short (recwr, 0); 184 } 185 186 /* Begin new sub-record. 187 Write 2 bytes rectype, and 2 bytes record length. */ 188 189 void 190 _bfd_vms_output_begin_subrec (struct vms_rec_wr *recwr, int rectype) 191 { 192 vms_debug2 ((6, "_bfd_vms_output_begin_subrec (type %d)\n", rectype)); 193 194 /* Subrecord must have been closed. */ 195 BFD_ASSERT (recwr->subrec_offset == 0); 196 197 /* Save start of subrecord offset. */ 198 recwr->subrec_offset = recwr->size; 199 200 /* Subrecord type. */ 201 _bfd_vms_output_short (recwr, (unsigned int) rectype); 202 203 /* Placeholder for length. */ 204 _bfd_vms_output_short (recwr, 0); 205 } 206 207 /* Set record/subrecord alignment. */ 208 209 void 210 _bfd_vms_output_alignment (struct vms_rec_wr *recwr, int alignto) 211 { 212 vms_debug2 ((6, "_bfd_vms_output_alignment (%d)\n", alignto)); 213 recwr->align = alignto; 214 } 215 216 /* Align the size of the current record (whose length is LENGTH). 217 Warning: this obviously changes the record (and the possible subrecord) 218 length. */ 219 220 static void 221 _bfd_vms_output_align (struct vms_rec_wr *recwr, unsigned int length) 222 { 223 unsigned int real_size = recwr->size; 224 unsigned int aligncount; 225 226 /* Pad with 0 if alignment is required. */ 227 aligncount = (recwr->align - (length % recwr->align)) % recwr->align; 228 vms_debug2 ((6, "align: adding %d bytes\n", aligncount)); 229 while (aligncount-- > 0) 230 recwr->buf[real_size++] = 0; 231 232 recwr->size = real_size; 233 } 234 235 /* Ends current sub-record. Set length field. */ 236 237 void 238 _bfd_vms_output_end_subrec (struct vms_rec_wr *recwr) 239 { 240 int real_size = recwr->size; 241 int length; 242 243 /* Subrecord must be open. */ 244 BFD_ASSERT (recwr->subrec_offset != 0); 245 246 length = real_size - recwr->subrec_offset; 247 248 if (length == 0) 249 return; 250 251 _bfd_vms_output_align (recwr, length); 252 253 /* Put length to buffer. */ 254 bfd_putl16 ((bfd_vma) (recwr->size - recwr->subrec_offset), 255 recwr->buf + recwr->subrec_offset + 2); 256 257 /* Close the subrecord. */ 258 recwr->subrec_offset = 0; 259 } 260 261 /* Ends current record (and write it). */ 262 263 void 264 _bfd_vms_output_end (bfd *abfd, struct vms_rec_wr *recwr) 265 { 266 vms_debug2 ((6, "_bfd_vms_output_end (size %u)\n", recwr->size)); 267 268 /* Subrecord must have been closed. */ 269 BFD_ASSERT (recwr->subrec_offset == 0); 270 271 if (recwr->size == 0) 272 return; 273 274 _bfd_vms_output_align (recwr, recwr->size); 275 276 /* Write the length word. */ 277 bfd_putl16 ((bfd_vma) recwr->size, recwr->buf + 2); 278 279 /* File is open in undefined (UDF) format on VMS, but ultimately will be 280 converted to variable length (VAR) format. VAR format has a length 281 word first which must be explicitly output in UDF format. */ 282 /* So, first the length word. */ 283 bfd_bwrite (recwr->buf + 2, 2, abfd); 284 285 /* Align. */ 286 if (recwr->size & 1) 287 recwr->buf[recwr->size++] = 0; 288 289 /* Then the record. */ 290 bfd_bwrite (recwr->buf, (size_t) recwr->size, abfd); 291 292 recwr->size = 0; 293 } 294 295 /* Check remaining buffer size. Return what's left. */ 296 297 int 298 _bfd_vms_output_check (struct vms_rec_wr *recwr, int size) 299 { 300 vms_debug2 ((6, "_bfd_vms_output_check (%d)\n", size)); 301 302 return (MAX_OUTREC_SIZE - (recwr->size + size + MIN_OUTREC_LUFT)); 303 } 304 305 /* Output byte (8 bit) value. */ 306 307 void 308 _bfd_vms_output_byte (struct vms_rec_wr *recwr, unsigned int value) 309 { 310 vms_debug2 ((6, "_bfd_vms_output_byte (%02x)\n", value)); 311 312 *(recwr->buf + recwr->size) = value; 313 recwr->size += 1; 314 } 315 316 /* Output short (16 bit) value. */ 317 318 void 319 _bfd_vms_output_short (struct vms_rec_wr *recwr, unsigned int value) 320 { 321 vms_debug2 ((6, "_bfd_vms_output_short (%04x)\n", value)); 322 323 bfd_putl16 ((bfd_vma) value & 0xffff, recwr->buf + recwr->size); 324 recwr->size += 2; 325 } 326 327 /* Output long (32 bit) value. */ 328 329 void 330 _bfd_vms_output_long (struct vms_rec_wr *recwr, unsigned long value) 331 { 332 vms_debug2 ((6, "_bfd_vms_output_long (%08lx)\n", value)); 333 334 bfd_putl32 ((bfd_vma) value, recwr->buf + recwr->size); 335 recwr->size += 4; 336 } 337 338 /* Output quad (64 bit) value. */ 339 340 void 341 _bfd_vms_output_quad (struct vms_rec_wr *recwr, bfd_vma value) 342 { 343 vms_debug2 ((6, "_bfd_vms_output_quad (%08lx)\n", (unsigned long)value)); 344 345 bfd_putl64 (value, recwr->buf + recwr->size); 346 recwr->size += 8; 347 } 348 349 /* Output c-string as counted string. */ 350 351 void 352 _bfd_vms_output_counted (struct vms_rec_wr *recwr, const char *value) 353 { 354 int len; 355 356 vms_debug2 ((6, "_bfd_vms_output_counted (%s)\n", value)); 357 358 len = strlen (value); 359 if (len == 0) 360 { 361 (*_bfd_error_handler) (_("_bfd_vms_output_counted called with zero bytes")); 362 return; 363 } 364 if (len > 255) 365 { 366 (*_bfd_error_handler) (_("_bfd_vms_output_counted called with too many bytes")); 367 return; 368 } 369 _bfd_vms_output_byte (recwr, (unsigned int) len & 0xff); 370 _bfd_vms_output_dump (recwr, (const unsigned char *)value, len); 371 } 372 373 /* Output character area. */ 374 375 void 376 _bfd_vms_output_dump (struct vms_rec_wr *recwr, const unsigned char *data, int len) 377 { 378 vms_debug2 ((6, "_bfd_vms_output_dump (%d)\n", len)); 379 380 if (len == 0) 381 return; 382 383 memcpy (recwr->buf + recwr->size, data, (size_t) len); 384 recwr->size += len; 385 } 386 387 /* Output count bytes of value. */ 388 389 void 390 _bfd_vms_output_fill (struct vms_rec_wr *recwr, int value, int count) 391 { 392 vms_debug2 ((6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count)); 393 394 if (count == 0) 395 return; 396 memset (recwr->buf + recwr->size, value, (size_t) count); 397 recwr->size += count; 398 } 399 400 #ifdef VMS 401 /* Convert the file to variable record length format. This is done 402 using undocumented system call sys$modify(). 403 Pure VMS version. */ 404 405 static void 406 vms_convert_to_var (char * vms_filename) 407 { 408 struct FAB fab = cc$rms_fab; 409 410 fab.fab$l_fna = vms_filename; 411 fab.fab$b_fns = strlen (vms_filename); 412 fab.fab$b_fac = FAB$M_PUT; 413 fab.fab$l_fop = FAB$M_ESC; 414 fab.fab$l_ctx = RME$C_SETRFM; 415 416 sys$open (&fab); 417 418 fab.fab$b_rfm = FAB$C_VAR; 419 420 sys$modify (&fab); 421 sys$close (&fab); 422 } 423 424 static int 425 vms_convert_to_var_1 (char *filename, int type) 426 { 427 if (type != DECC$K_FILE) 428 return FALSE; 429 vms_convert_to_var (filename); 430 return TRUE; 431 } 432 433 /* Convert the file to variable record length format. This is done 434 using undocumented system call sys$modify(). 435 Unix filename version. */ 436 437 int 438 _bfd_vms_convert_to_var_unix_filename (const char *unix_filename) 439 { 440 if (decc$to_vms (unix_filename, &vms_convert_to_var_1, 0, 1) != 1) 441 return FALSE; 442 return TRUE; 443 } 444 #endif /* VMS */ 445 446 /* Manufacture a VMS like time on a unix based system. 447 stolen from obj-vms.c. */ 448 449 unsigned char * 450 get_vms_time_string (void) 451 { 452 static unsigned char tbuf[18]; 453 #ifndef VMS 454 char *pnt; 455 time_t timeb; 456 457 time (& timeb); 458 pnt = ctime (&timeb); 459 pnt[3] = 0; 460 pnt[7] = 0; 461 pnt[10] = 0; 462 pnt[16] = 0; 463 pnt[24] = 0; 464 sprintf ((char *) tbuf, "%2s-%3s-%s %s", 465 pnt + 8, pnt + 4, pnt + 20, pnt + 11); 466 #else 467 struct 468 { 469 int Size; 470 unsigned char *Ptr; 471 } Descriptor; 472 Descriptor.Size = 17; 473 Descriptor.Ptr = tbuf; 474 SYS$ASCTIM (0, &Descriptor, 0, 0); 475 #endif /* not VMS */ 476 477 vms_debug2 ((6, "vmstimestring:'%s'\n", tbuf)); 478 479 return tbuf; 480 } 481 482 /* Create module name from filename (ie, extract the basename and convert it 483 in upper cases). Works on both VMS and UNIX pathes. 484 The result has to be free(). */ 485 486 char * 487 vms_get_module_name (const char *filename, bfd_boolean upcase) 488 { 489 char *fname, *fptr; 490 const char *fout; 491 492 /* Strip VMS path. */ 493 fout = strrchr (filename, ']'); 494 if (fout == NULL) 495 fout = strchr (filename, ':'); 496 if (fout != NULL) 497 fout++; 498 else 499 fout = filename; 500 501 /* Strip UNIX path. */ 502 fptr = strrchr (fout, '/'); 503 if (fptr != NULL) 504 fout = fptr + 1; 505 506 fname = strdup (fout); 507 508 /* Strip suffix. */ 509 fptr = strrchr (fname, '.'); 510 if (fptr != 0) 511 *fptr = 0; 512 513 /* Convert to upper case and truncate at 31 characters. 514 (VMS object file format restricts module name length to 31). */ 515 fptr = fname; 516 for (fptr = fname; *fptr != 0; fptr++) 517 { 518 if (*fptr == ';' || (fptr - fname) >= 31) 519 { 520 *fptr = 0; 521 break; 522 } 523 if (upcase) 524 *fptr = TOUPPER (*fptr); 525 } 526 return fname; 527 } 528 529 /* Compared to usual UNIX time_t, VMS time has less limits: 530 - 64 bit (63 bits in fact as the MSB must be 0) 531 - 100ns granularity 532 - epoch is Nov 17, 1858. 533 Here has the constants and the routines used to convert VMS from/to UNIX time. 534 The conversion routines don't assume 64 bits arithmetic. 535 536 Here we assume that the definition of time_t is the UNIX one, ie integer 537 type, expressing seconds since the epoch. */ 538 539 /* UNIX time granularity for VMS, ie 1s / 100ns. */ 540 #define VMS_TIME_FACTOR 10000000 541 542 /* Number of seconds since VMS epoch of the UNIX epoch. */ 543 #define VMS_TIME_OFFSET 3506716800U 544 545 /* Convert a VMS time to a unix time. */ 546 547 time_t 548 vms_time_to_time_t (unsigned int hi, unsigned int lo) 549 { 550 unsigned int tmp; 551 unsigned int rlo; 552 int i; 553 time_t res; 554 555 /* First convert to seconds. */ 556 tmp = hi % VMS_TIME_FACTOR; 557 hi = hi / VMS_TIME_FACTOR; 558 rlo = 0; 559 for (i = 0; i < 4; i++) 560 { 561 tmp = (tmp << 8) | (lo >> 24); 562 lo <<= 8; 563 564 rlo = (rlo << 8) | (tmp / VMS_TIME_FACTOR); 565 tmp %= VMS_TIME_FACTOR; 566 } 567 lo = rlo; 568 569 /* Return 0 in case of overflow. */ 570 if (hi > 1 571 || (hi == 1 && lo >= VMS_TIME_OFFSET)) 572 return 0; 573 574 /* Return 0 in case of underflow. */ 575 if (hi == 0 && lo < VMS_TIME_OFFSET) 576 return 0; 577 578 res = lo - VMS_TIME_OFFSET; 579 if (res <= 0) 580 return 0; 581 return res; 582 } 583 584 /* Convert a time_t to a VMS time. */ 585 586 void 587 vms_time_t_to_vms_time (time_t ut, unsigned int *hi, unsigned int *lo) 588 { 589 unsigned short val[4]; 590 unsigned short tmp[4]; 591 unsigned int carry; 592 int i; 593 594 /* Put into val. */ 595 val[0] = ut & 0xffff; 596 val[1] = (ut >> 16) & 0xffff; 597 val[2] = sizeof (ut) > 4 ? (ut >> 32) & 0xffff : 0; 598 val[3] = sizeof (ut) > 4 ? (ut >> 48) & 0xffff : 0; 599 600 /* Add offset. */ 601 tmp[0] = VMS_TIME_OFFSET & 0xffff; 602 tmp[1] = VMS_TIME_OFFSET >> 16; 603 tmp[2] = 0; 604 tmp[3] = 0; 605 carry = 0; 606 for (i = 0; i < 4; i++) 607 { 608 carry += tmp[i] + val[i]; 609 val[i] = carry & 0xffff; 610 carry = carry >> 16; 611 } 612 613 /* Multiply by factor, well first by 10000 and then by 1000. */ 614 carry = 0; 615 for (i = 0; i < 4; i++) 616 { 617 carry += val[i] * 10000; 618 val[i] = carry & 0xffff; 619 carry = carry >> 16; 620 } 621 carry = 0; 622 for (i = 0; i < 4; i++) 623 { 624 carry += val[i] * 1000; 625 val[i] = carry & 0xffff; 626 carry = carry >> 16; 627 } 628 629 /* Write the result. */ 630 *lo = val[0] | (val[1] << 16); 631 *hi = val[2] | (val[3] << 16); 632 } 633 634 /* Convert a raw (stored in a buffer) VMS time to a unix time. */ 635 636 time_t 637 vms_rawtime_to_time_t (unsigned char *buf) 638 { 639 unsigned int hi = bfd_getl32 (buf + 4); 640 unsigned int lo = bfd_getl32 (buf + 0); 641 642 return vms_time_to_time_t (hi, lo); 643 } 644 645 void 646 vms_get_time (unsigned int *hi, unsigned int *lo) 647 { 648 #ifdef VMS 649 struct _generic_64 t; 650 651 sys$gettim (&t); 652 *lo = t.gen64$q_quadword; 653 *hi = t.gen64$q_quadword >> 32; 654 #else 655 time_t t; 656 657 time (&t); 658 vms_time_t_to_vms_time (t, hi, lo); 659 #endif 660 } 661 662 /* Get the current time into a raw buffer BUF. */ 663 664 void 665 vms_raw_get_time (unsigned char *buf) 666 { 667 unsigned int hi, lo; 668 669 vms_get_time (&hi, &lo); 670 bfd_putl32 (lo, buf + 0); 671 bfd_putl32 (hi, buf + 4); 672 } 673
