| 1 | /* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and |
| 2 | EVAX (openVMS/Alpha) files. |
| 3 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
| 4 | 2007, 2008, 2009 Free Software Foundation, Inc. |
| 5 | |
| 6 | Miscellaneous functions. |
| 7 | |
| 8 | Written by Klaus K"ampf (kkaempf@rmi.de) |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 23 | MA 02110-1301, USA. */ |
| 24 | |
| 25 | #if __STDC__ |
| 26 | #include <stdarg.h> |
| 27 | #endif |
| 28 | |
| 29 | #include "sysdep.h" |
| 30 | #include "bfd.h" |
| 31 | #include "bfdlink.h" |
| 32 | #include "libbfd.h" |
| 33 | |
| 34 | #include "vms.h" |
| 35 | |
| 36 | #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
| 37 | |
| 38 | static int hash_string PARAMS ((const char *)); |
| 39 | static asymbol *new_symbol PARAMS ((bfd *, char *)); |
| 40 | static void maybe_adjust_record_pointer_for_object PARAMS ((bfd *)); |
| 41 | static int vms_get_remaining_object_record PARAMS ((bfd *, int )); |
| 42 | static int vms_get_remaining_image_record PARAMS ((bfd *, int )); |
| 43 | |
| 44 | #if VMS_DEBUG |
| 45 | /* Debug functions. */ |
| 46 | |
| 47 | /* Debug function for all vms extensions evaluates environment |
| 48 | variable VMS_DEBUG for a numerical value on the first call all |
| 49 | error levels below this value are printed: |
| 50 | |
| 51 | Levels: |
| 52 | 1 toplevel bfd calls (functions from the bfd vector) |
| 53 | 2 functions called by bfd calls |
| 54 | ... |
| 55 | 9 almost everything |
| 56 | |
| 57 | Level is also indentation level. Indentation is performed |
| 58 | if level > 0. */ |
| 59 | |
| 60 | void |
| 61 | _bfd_vms_debug (int level, char *format, ...) |
| 62 | { |
| 63 | static int min_level = -1; |
| 64 | static FILE *output = NULL; |
| 65 | char *eptr; |
| 66 | va_list args; |
| 67 | int abslvl = (level > 0) ? level : - level; |
| 68 | |
| 69 | if (min_level == -1) |
| 70 | { |
| 71 | if ((eptr = getenv ("VMS_DEBUG")) != NULL) |
| 72 | { |
| 73 | min_level = atoi (eptr); |
| 74 | output = stderr; |
| 75 | } |
| 76 | else |
| 77 | min_level = 0; |
| 78 | } |
| 79 | if (output == NULL) |
| 80 | return; |
| 81 | if (abslvl > min_level) |
| 82 | return; |
| 83 | |
| 84 | while (--level>0) |
| 85 | fprintf (output, " "); |
| 86 | va_start (args, format); |
| 87 | vfprintf (output, format, args); |
| 88 | fflush (output); |
| 89 | va_end (args); |
| 90 | } |
| 91 | |
| 92 | /* A debug function |
| 93 | hex dump 'size' bytes starting at 'ptr'. */ |
| 94 | |
| 95 | void |
| 96 | _bfd_hexdump (int level, |
| 97 | unsigned char *ptr, |
| 98 | int size, |
| 99 | int offset) |
| 100 | { |
| 101 | unsigned char *lptr = ptr; |
| 102 | int count = 0; |
| 103 | long start = offset; |
| 104 | |
| 105 | while (size-- > 0) |
| 106 | { |
| 107 | if ((count%16) == 0) |
| 108 | vms_debug (level, "%08lx:", start); |
| 109 | vms_debug (-level, " %02x", *ptr++); |
| 110 | count++; |
| 111 | start++; |
| 112 | if (size == 0) |
| 113 | { |
| 114 | while ((count%16) != 0) |
| 115 | { |
| 116 | vms_debug (-level, " "); |
| 117 | count++; |
| 118 | } |
| 119 | } |
| 120 | if ((count%16) == 0) |
| 121 | { |
| 122 | vms_debug (-level, " "); |
| 123 | while (lptr < ptr) |
| 124 | { |
| 125 | vms_debug (-level, "%c", (*lptr < 32)?'.':*lptr); |
| 126 | lptr++; |
| 127 | } |
| 128 | vms_debug (-level, "\n"); |
| 129 | } |
| 130 | } |
| 131 | if ((count%16) != 0) |
| 132 | vms_debug (-level, "\n"); |
| 133 | } |
| 134 | #endif |
| 135 | \f |
| 136 | /* Hash functions |
| 137 | |
| 138 | These are needed when reading an object file. */ |
| 139 | |
| 140 | /* Allocate new vms_hash_entry |
| 141 | keep the symbol name and a pointer to the bfd symbol in the table. */ |
| 142 | |
| 143 | struct bfd_hash_entry * |
| 144 | _bfd_vms_hash_newfunc (struct bfd_hash_entry *entry, |
| 145 | struct bfd_hash_table *table, |
| 146 | const char *string) |
| 147 | { |
| 148 | vms_symbol_entry *ret; |
| 149 | |
| 150 | #if VMS_DEBUG |
| 151 | vms_debug (5, "_bfd_vms_hash_newfunc (%p, %p, %s)\n", entry, table, string); |
| 152 | #endif |
| 153 | |
| 154 | if (entry == NULL) |
| 155 | { |
| 156 | ret = (vms_symbol_entry *) |
| 157 | bfd_hash_allocate (table, sizeof (vms_symbol_entry)); |
| 158 | if (ret == NULL) |
| 159 | { |
| 160 | bfd_set_error (bfd_error_no_memory); |
| 161 | return NULL; |
| 162 | } |
| 163 | entry = (struct bfd_hash_entry *) ret; |
| 164 | } |
| 165 | |
| 166 | /* Call the allocation method of the base class. */ |
| 167 | ret = (vms_symbol_entry *) bfd_hash_newfunc (entry, table, string); |
| 168 | #if VMS_DEBUG |
| 169 | vms_debug (6, "_bfd_vms_hash_newfunc ret %p\n", ret); |
| 170 | #endif |
| 171 | |
| 172 | ret->symbol = NULL; |
| 173 | |
| 174 | return (struct bfd_hash_entry *)ret; |
| 175 | } |
| 176 | \f |
| 177 | /* Object file input functions. */ |
| 178 | |
| 179 | /* Return type and size from record header (buf) on Alpha. */ |
| 180 | |
| 181 | void |
| 182 | _bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED, |
| 183 | unsigned char *buf, |
| 184 | int *type, |
| 185 | int *size) |
| 186 | { |
| 187 | if (type) |
| 188 | *type = bfd_getl16 (buf); |
| 189 | |
| 190 | if (size) |
| 191 | *size = bfd_getl16 (buf+2); |
| 192 | |
| 193 | #if VMS_DEBUG |
| 194 | vms_debug (10, "_bfd_vms_get_header_values type %x, size %x\n", |
| 195 | type ? *type : 0, size ? *size : 0); |
| 196 | #endif |
| 197 | } |
| 198 | |
| 199 | /* Get next record from object file to vms_buf. |
| 200 | Set PRIV(buf_size) and return it |
| 201 | |
| 202 | This is a little tricky since it should be portable. |
| 203 | |
| 204 | The openVMS object file has 'variable length' which means that |
| 205 | read() returns data in chunks of (hopefully) correct and expected |
| 206 | size. The linker (and other tools on VMS) depend on that. Unix |
| 207 | doesn't know about 'formatted' files, so reading and writing such |
| 208 | an object file in a Unix environment is not trivial. |
| 209 | |
| 210 | With the tool 'file' (available on all VMS FTP sites), one |
| 211 | can view and change the attributes of a file. Changing from |
| 212 | 'variable length' to 'fixed length, 512 bytes' reveals the |
| 213 | record size at the first 2 bytes of every record. The same |
| 214 | may happen during the transfer of object files from VMS to Unix, |
| 215 | at least with UCX, the DEC implementation of TCP/IP. |
| 216 | |
| 217 | The VMS format repeats the size at bytes 2 & 3 of every record. |
| 218 | |
| 219 | On the first call (file_format == FF_UNKNOWN) we check if |
| 220 | the first and the third byte pair (!) of the record match. |
| 221 | If they do it's an object file in an Unix environment or with |
| 222 | wrong attributes (FF_FOREIGN), else we should be in a VMS |
| 223 | environment where read() returns the record size (FF_NATIVE). |
| 224 | |
| 225 | Reading is always done in 2 steps: |
| 226 | 1. first just the record header is read and the size extracted, |
| 227 | 2. then the read buffer is adjusted and the remaining bytes are |
| 228 | read in. |
| 229 | |
| 230 | All file I/O is done on even file positions. */ |
| 231 | |
| 232 | #define VMS_OBJECT_ADJUSTMENT 2 |
| 233 | |
| 234 | static void |
| 235 | maybe_adjust_record_pointer_for_object (bfd *abfd) |
| 236 | { |
| 237 | /* Set the file format once for all on the first invocation. */ |
| 238 | if (PRIV (file_format) == FF_UNKNOWN) |
| 239 | { |
| 240 | if (PRIV (vms_rec)[0] == PRIV (vms_rec)[4] |
| 241 | && PRIV (vms_rec)[1] == PRIV (vms_rec)[5]) |
| 242 | PRIV (file_format) = FF_FOREIGN; |
| 243 | else |
| 244 | PRIV (file_format) = FF_NATIVE; |
| 245 | } |
| 246 | |
| 247 | /* The adjustment is needed only in an Unix environment. */ |
| 248 | if (PRIV (file_format) == FF_FOREIGN) |
| 249 | PRIV (vms_rec) += VMS_OBJECT_ADJUSTMENT; |
| 250 | } |
| 251 | |
| 252 | /* Get first record from file and return the file type. */ |
| 253 | |
| 254 | int |
| 255 | _bfd_vms_get_first_record (bfd *abfd) |
| 256 | { |
| 257 | unsigned int test_len; |
| 258 | |
| 259 | #if VMS_DEBUG |
| 260 | vms_debug (8, "_bfd_vms_get_first_record\n"); |
| 261 | #endif |
| 262 | |
| 263 | if (PRIV (is_vax)) |
| 264 | test_len = 0; |
| 265 | else |
| 266 | /* Minimum is 6 bytes for objects (2 bytes size, 2 bytes record id, |
| 267 | 2 bytes size repeated) and 12 bytes for images (4 bytes major id, |
| 268 | 4 bytes minor id, 4 bytes length). */ |
| 269 | test_len = 12; |
| 270 | |
| 271 | /* Size the main buffer. */ |
| 272 | if (PRIV (buf_size) == 0) |
| 273 | { |
| 274 | /* On VAX there's no size information in the record, so |
| 275 | start with OBJ_S_C_MAXRECSIZ. */ |
| 276 | bfd_size_type amt = (test_len ? test_len : OBJ_S_C_MAXRECSIZ); |
| 277 | PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt); |
| 278 | PRIV (buf_size) = amt; |
| 279 | } |
| 280 | |
| 281 | /* Initialize the record pointer. */ |
| 282 | PRIV (vms_rec) = PRIV (vms_buf); |
| 283 | |
| 284 | /* We only support modules on VAX. */ |
| 285 | if (PRIV (is_vax)) |
| 286 | { |
| 287 | if (vms_get_remaining_object_record (abfd, test_len) <= 0) |
| 288 | return FT_UNKNOWN; |
| 289 | |
| 290 | #if VMS_DEBUG |
| 291 | vms_debug (2, "file type is VAX module\n"); |
| 292 | #endif |
| 293 | |
| 294 | return FT_MODULE; |
| 295 | } |
| 296 | |
| 297 | if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len) |
| 298 | { |
| 299 | bfd_set_error (bfd_error_file_truncated); |
| 300 | return FT_UNKNOWN; |
| 301 | } |
| 302 | |
| 303 | /* Is it an image? */ |
| 304 | if ((bfd_getl32 (PRIV (vms_rec)) == EIHD_S_K_MAJORID) |
| 305 | && (bfd_getl32 (PRIV (vms_rec) + 4) == EIHD_S_K_MINORID)) |
| 306 | { |
| 307 | if (vms_get_remaining_image_record (abfd, test_len) <= 0) |
| 308 | return FT_UNKNOWN; |
| 309 | |
| 310 | #if VMS_DEBUG |
| 311 | vms_debug (2, "file type is image\n"); |
| 312 | #endif |
| 313 | |
| 314 | return FT_IMAGE; |
| 315 | } |
| 316 | |
| 317 | /* Assume it's a module and adjust record pointer if necessary. */ |
| 318 | maybe_adjust_record_pointer_for_object (abfd); |
| 319 | |
| 320 | /* But is it really a module? */ |
| 321 | if (bfd_getl16 (PRIV (vms_rec)) <= EOBJ_S_C_MAXRECTYP |
| 322 | && bfd_getl16 (PRIV (vms_rec) + 2) <= EOBJ_S_C_MAXRECSIZ) |
| 323 | { |
| 324 | if (vms_get_remaining_object_record (abfd, test_len) <= 0) |
| 325 | return FT_UNKNOWN; |
| 326 | |
| 327 | #if VMS_DEBUG |
| 328 | vms_debug (2, "file type is module\n"); |
| 329 | #endif |
| 330 | |
| 331 | return FT_MODULE; |
| 332 | } |
| 333 | |
| 334 | #if VMS_DEBUG |
| 335 | vms_debug (2, "file type is unknown\n"); |
| 336 | #endif |
| 337 | |
| 338 | return FT_UNKNOWN; |
| 339 | } |
| 340 | |
| 341 | /* Implement step #1 of the object record reading procedure. |
| 342 | Return the record type or -1 on failure. */ |
| 343 | |
| 344 | int |
| 345 | _bfd_vms_get_object_record (bfd *abfd) |
| 346 | { |
| 347 | unsigned int test_len; |
| 348 | int type; |
| 349 | |
| 350 | #if VMS_DEBUG |
| 351 | vms_debug (8, "_bfd_vms_get_obj_record\n"); |
| 352 | #endif |
| 353 | |
| 354 | if (PRIV (is_vax)) |
| 355 | test_len = 0; |
| 356 | else |
| 357 | { |
| 358 | int off = 0; |
| 359 | |
| 360 | /* See _bfd_vms_get_first_record. */ |
| 361 | test_len = 6; |
| 362 | |
| 363 | /* Skip odd alignment byte. */ |
| 364 | if (bfd_tell (abfd) & 1) |
| 365 | { |
| 366 | if (bfd_bread (PRIV (vms_buf), 1, abfd) != 1) |
| 367 | { |
| 368 | bfd_set_error (bfd_error_file_truncated); |
| 369 | return -1; |
| 370 | } |
| 371 | /* Alignment byte may be present or not. This is not easy to |
| 372 | detect but all object record types are not 0 (on Alpha VMS). |
| 373 | We also hope that pad byte is 0. */ |
| 374 | if (PRIV (vms_buf)[0]) |
| 375 | off = 1; |
| 376 | } |
| 377 | |
| 378 | /* Read the record header */ |
| 379 | if (bfd_bread (PRIV (vms_buf) + off, test_len - off, abfd) |
| 380 | != test_len - off) |
| 381 | { |
| 382 | bfd_set_error (bfd_error_file_truncated); |
| 383 | return -1; |
| 384 | } |
| 385 | |
| 386 | /* Reset the record pointer. */ |
| 387 | PRIV (vms_rec) = PRIV (vms_buf); |
| 388 | maybe_adjust_record_pointer_for_object (abfd); |
| 389 | } |
| 390 | |
| 391 | if (vms_get_remaining_object_record (abfd, test_len) <= 0) |
| 392 | return -1; |
| 393 | |
| 394 | if (PRIV (is_vax)) |
| 395 | type = PRIV (vms_rec) [0]; |
| 396 | else |
| 397 | type = bfd_getl16 (PRIV (vms_rec)); |
| 398 | |
| 399 | #if VMS_DEBUG |
| 400 | vms_debug (8, "_bfd_vms_get_obj_record: rec %p, size %d, type %d\n", |
| 401 | PRIV (vms_rec), PRIV (rec_size), type); |
| 402 | #endif |
| 403 | |
| 404 | return type; |
| 405 | } |
| 406 | |
| 407 | /* Implement step #2 of the object record reading procedure. |
| 408 | Return the size of the record or 0 on failure. */ |
| 409 | |
| 410 | static int |
| 411 | vms_get_remaining_object_record (bfd *abfd, int read_so_far) |
| 412 | { |
| 413 | #if VMS_DEBUG |
| 414 | vms_debug (8, "vms_get_remaining_obj_record\n"); |
| 415 | #endif |
| 416 | |
| 417 | if (PRIV (is_vax)) |
| 418 | { |
| 419 | if (read_so_far != 0) |
| 420 | abort (); |
| 421 | |
| 422 | PRIV (rec_size) = bfd_bread (PRIV (vms_buf), PRIV (buf_size), abfd); |
| 423 | |
| 424 | if (PRIV (rec_size) <= 0) |
| 425 | { |
| 426 | bfd_set_error (bfd_error_file_truncated); |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | /* Reset the record pointer. */ |
| 431 | PRIV (vms_rec) = PRIV (vms_buf); |
| 432 | } |
| 433 | else |
| 434 | { |
| 435 | unsigned int to_read; |
| 436 | |
| 437 | /* Extract record size. */ |
| 438 | PRIV (rec_size) = bfd_getl16 (PRIV (vms_rec) + 2); |
| 439 | |
| 440 | if (PRIV (rec_size) <= 0) |
| 441 | { |
| 442 | bfd_set_error (bfd_error_file_truncated); |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | /* That's what the linker manual says. */ |
| 447 | if (PRIV (rec_size) > EOBJ_S_C_MAXRECSIZ) |
| 448 | { |
| 449 | bfd_set_error (bfd_error_file_truncated); |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /* Take into account object adjustment. */ |
| 454 | to_read = PRIV (rec_size); |
| 455 | if (PRIV (file_format) == FF_FOREIGN) |
| 456 | to_read += VMS_OBJECT_ADJUSTMENT; |
| 457 | |
| 458 | /* Adjust the buffer. */ |
| 459 | if (to_read > PRIV (buf_size)) |
| 460 | { |
| 461 | PRIV (vms_buf) |
| 462 | = (unsigned char *) bfd_realloc (PRIV (vms_buf), to_read); |
| 463 | if (PRIV (vms_buf) == NULL) |
| 464 | return 0; |
| 465 | PRIV (buf_size) = to_read; |
| 466 | } |
| 467 | |
| 468 | /* Read the remaining record. */ |
| 469 | to_read -= read_so_far; |
| 470 | |
| 471 | #if VMS_DEBUG |
| 472 | vms_debug (8, "vms_get_remaining_obj_record: to_read %d\n", to_read); |
| 473 | #endif |
| 474 | |
| 475 | if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read) |
| 476 | { |
| 477 | bfd_set_error (bfd_error_file_truncated); |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | /* Reset the record pointer. */ |
| 482 | PRIV (vms_rec) = PRIV (vms_buf); |
| 483 | maybe_adjust_record_pointer_for_object (abfd); |
| 484 | } |
| 485 | |
| 486 | #if VMS_DEBUG |
| 487 | vms_debug (8, "vms_get_remaining_obj_record: size %d\n", PRIV (rec_size)); |
| 488 | #endif |
| 489 | |
| 490 | return PRIV (rec_size); |
| 491 | } |
| 492 | |
| 493 | /* Implement step #2 of the record reading procedure for images. |
| 494 | Return the size of the record or 0 on failure. */ |
| 495 | |
| 496 | static int |
| 497 | vms_get_remaining_image_record (bfd *abfd, int read_so_far) |
| 498 | { |
| 499 | unsigned int to_read; |
| 500 | int remaining; |
| 501 | |
| 502 | /* Extract record size. */ |
| 503 | PRIV (rec_size) = bfd_getl32 (PRIV (vms_rec) + EIHD_S_L_SIZE); |
| 504 | |
| 505 | if (PRIV (rec_size) > PRIV (buf_size)) |
| 506 | { |
| 507 | PRIV (vms_buf) = bfd_realloc (PRIV (vms_buf), PRIV (rec_size)); |
| 508 | |
| 509 | if (PRIV (vms_buf) == NULL) |
| 510 | { |
| 511 | bfd_set_error (bfd_error_no_memory); |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | PRIV (buf_size) = PRIV (rec_size); |
| 516 | } |
| 517 | |
| 518 | /* Read the remaining record. */ |
| 519 | remaining = PRIV (rec_size) - read_so_far; |
| 520 | to_read = MIN (VMS_BLOCK_SIZE - read_so_far, remaining); |
| 521 | |
| 522 | while (remaining > 0) |
| 523 | { |
| 524 | if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read) |
| 525 | { |
| 526 | bfd_set_error (bfd_error_file_truncated); |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | read_so_far += to_read; |
| 531 | remaining -= to_read; |
| 532 | |
| 533 | /* Eat trailing 0xff's. */ |
| 534 | if (remaining > 0) |
| 535 | while (PRIV (vms_buf) [read_so_far - 1] == 0xff) |
| 536 | read_so_far--; |
| 537 | |
| 538 | to_read = MIN (VMS_BLOCK_SIZE, remaining); |
| 539 | } |
| 540 | |
| 541 | /* Reset the record pointer. */ |
| 542 | PRIV (vms_rec) = PRIV (vms_buf); |
| 543 | |
| 544 | return PRIV (rec_size); |
| 545 | } |
| 546 | |
| 547 | /* Copy sized string (string with fixed size) to new allocated area |
| 548 | size is string size (size of record) */ |
| 549 | |
| 550 | char * |
| 551 | _bfd_vms_save_sized_string (unsigned char *str, int size) |
| 552 | { |
| 553 | char *newstr = bfd_malloc ((bfd_size_type) size + 1); |
| 554 | |
| 555 | if (newstr == NULL) |
| 556 | return NULL; |
| 557 | strncpy (newstr, (char *) str, (size_t) size); |
| 558 | newstr[size] = 0; |
| 559 | |
| 560 | return newstr; |
| 561 | } |
| 562 | |
| 563 | /* Copy counted string (string with size at first byte) to new allocated area |
| 564 | ptr points to size byte on entry */ |
| 565 | |
| 566 | char * |
| 567 | _bfd_vms_save_counted_string (unsigned char *ptr) |
| 568 | { |
| 569 | int len = *ptr++; |
| 570 | |
| 571 | return _bfd_vms_save_sized_string (ptr, len); |
| 572 | } |
| 573 | \f |
| 574 | /* Stack routines for vms ETIR commands. */ |
| 575 | |
| 576 | /* Push value and section index. */ |
| 577 | |
| 578 | void |
| 579 | _bfd_vms_push (bfd * abfd, uquad val, int psect) |
| 580 | { |
| 581 | static int last_psect; |
| 582 | |
| 583 | #if VMS_DEBUG |
| 584 | vms_debug (4, "<push %016lx (%d) at %d>\n", val, psect, PRIV (stackptr)); |
| 585 | #endif |
| 586 | |
| 587 | if (psect >= 0) |
| 588 | last_psect = psect; |
| 589 | |
| 590 | PRIV (stack[PRIV (stackptr)]).value = val; |
| 591 | PRIV (stack[PRIV (stackptr)]).psect = last_psect; |
| 592 | PRIV (stackptr)++; |
| 593 | if (PRIV (stackptr) >= STACKSIZE) |
| 594 | { |
| 595 | bfd_set_error (bfd_error_bad_value); |
| 596 | (*_bfd_error_handler) (_("Stack overflow (%d) in _bfd_vms_push"), PRIV (stackptr)); |
| 597 | exit (1); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /* Pop value and section index. */ |
| 602 | |
| 603 | uquad |
| 604 | _bfd_vms_pop (bfd * abfd, int *psect) |
| 605 | { |
| 606 | uquad value; |
| 607 | |
| 608 | if (PRIV (stackptr) == 0) |
| 609 | { |
| 610 | bfd_set_error (bfd_error_bad_value); |
| 611 | (*_bfd_error_handler) (_("Stack underflow in _bfd_vms_pop")); |
| 612 | exit (1); |
| 613 | } |
| 614 | PRIV (stackptr)--; |
| 615 | value = PRIV (stack[PRIV (stackptr)]).value; |
| 616 | if ((psect != NULL) && (PRIV (stack[PRIV (stackptr)]).psect >= 0)) |
| 617 | *psect = PRIV (stack[PRIV (stackptr)]).psect; |
| 618 | |
| 619 | #if VMS_DEBUG |
| 620 | vms_debug (4, "<pop %016lx(%d)>\n", value, PRIV (stack[PRIV (stackptr)]).psect); |
| 621 | #endif |
| 622 | |
| 623 | return value; |
| 624 | } |
| 625 | \f |
| 626 | /* Object output routines. */ |
| 627 | |
| 628 | /* Begin new record or record header |
| 629 | write 2 bytes rectype |
| 630 | write 2 bytes record length (filled in at flush) |
| 631 | write 2 bytes header type (ommitted if rechead == -1). */ |
| 632 | |
| 633 | void |
| 634 | _bfd_vms_output_begin (bfd * abfd, int rectype, int rechead) |
| 635 | { |
| 636 | #if VMS_DEBUG |
| 637 | vms_debug (6, "_bfd_vms_output_begin (type %d, head %d)\n", rectype, |
| 638 | rechead); |
| 639 | #endif |
| 640 | |
| 641 | _bfd_vms_output_short (abfd, (unsigned int) rectype); |
| 642 | |
| 643 | /* Save current output position to fill in length later. */ |
| 644 | |
| 645 | if (PRIV (push_level) > 0) |
| 646 | PRIV (length_pos) = PRIV (output_size); |
| 647 | |
| 648 | #if VMS_DEBUG |
| 649 | vms_debug (6, "_bfd_vms_output_begin: length_pos = %d\n", |
| 650 | PRIV (length_pos)); |
| 651 | #endif |
| 652 | |
| 653 | /* Placeholder for length. */ |
| 654 | _bfd_vms_output_short (abfd, 0); |
| 655 | |
| 656 | if (rechead != -1) |
| 657 | _bfd_vms_output_short (abfd, (unsigned int) rechead); |
| 658 | } |
| 659 | |
| 660 | /* Set record/subrecord alignment. */ |
| 661 | |
| 662 | void |
| 663 | _bfd_vms_output_alignment (bfd * abfd, int alignto) |
| 664 | { |
| 665 | #if VMS_DEBUG |
| 666 | vms_debug (6, "_bfd_vms_output_alignment (%d)\n", alignto); |
| 667 | #endif |
| 668 | |
| 669 | PRIV (output_alignment) = alignto; |
| 670 | } |
| 671 | |
| 672 | /* Prepare for subrecord fields. */ |
| 673 | |
| 674 | void |
| 675 | _bfd_vms_output_push (bfd * abfd) |
| 676 | { |
| 677 | #if VMS_DEBUG |
| 678 | vms_debug (6, "vms_output_push (pushed_size = %d)\n", PRIV (output_size)); |
| 679 | #endif |
| 680 | |
| 681 | PRIV (push_level)++; |
| 682 | PRIV (pushed_size) = PRIV (output_size); |
| 683 | } |
| 684 | |
| 685 | /* End of subrecord fields. */ |
| 686 | |
| 687 | void |
| 688 | _bfd_vms_output_pop (bfd * abfd) |
| 689 | { |
| 690 | #if VMS_DEBUG |
| 691 | vms_debug (6, "vms_output_pop (pushed_size = %d)\n", PRIV (pushed_size)); |
| 692 | #endif |
| 693 | |
| 694 | _bfd_vms_output_flush (abfd); |
| 695 | PRIV (length_pos) = 2; |
| 696 | |
| 697 | #if VMS_DEBUG |
| 698 | vms_debug (6, "vms_output_pop: length_pos = %d\n", PRIV (length_pos)); |
| 699 | #endif |
| 700 | |
| 701 | PRIV (pushed_size) = 0; |
| 702 | PRIV (push_level)--; |
| 703 | } |
| 704 | |
| 705 | /* Flush unwritten output, ends current record. */ |
| 706 | |
| 707 | void |
| 708 | _bfd_vms_output_flush (bfd * abfd) |
| 709 | { |
| 710 | int real_size = PRIV (output_size); |
| 711 | int aligncount; |
| 712 | int length; |
| 713 | |
| 714 | #if VMS_DEBUG |
| 715 | vms_debug (6, "_bfd_vms_output_flush (real_size = %d, pushed_size %d at lenpos %d)\n", |
| 716 | real_size, PRIV (pushed_size), PRIV (length_pos)); |
| 717 | #endif |
| 718 | |
| 719 | if (PRIV (push_level) > 0) |
| 720 | length = real_size - PRIV (pushed_size); |
| 721 | else |
| 722 | length = real_size; |
| 723 | |
| 724 | if (length == 0) |
| 725 | return; |
| 726 | aligncount = (PRIV (output_alignment) |
| 727 | - (length % PRIV (output_alignment))) % PRIV (output_alignment); |
| 728 | |
| 729 | #if VMS_DEBUG |
| 730 | vms_debug (6, "align: adding %d bytes\n", aligncount); |
| 731 | #endif |
| 732 | |
| 733 | while (aligncount-- > 0) |
| 734 | { |
| 735 | PRIV (output_buf)[real_size++] = 0; |
| 736 | length++; |
| 737 | } |
| 738 | |
| 739 | /* Put length to buffer. */ |
| 740 | PRIV (output_size) = PRIV (length_pos); |
| 741 | _bfd_vms_output_short (abfd, (unsigned int) length); |
| 742 | |
| 743 | if (PRIV (push_level) == 0) |
| 744 | { |
| 745 | /* File is open in undefined (UDF) format on VMS, but ultimately will be |
| 746 | converted to variable length (VAR) format. VAR format has a length |
| 747 | word first which must be explicitly output in UDF format. */ |
| 748 | bfd_bwrite (PRIV (output_buf) + 2, 2, abfd); |
| 749 | bfd_bwrite (PRIV (output_buf), (size_t) real_size, abfd); |
| 750 | PRIV (output_size) = 0; |
| 751 | } |
| 752 | else |
| 753 | { |
| 754 | PRIV (output_size) = real_size; |
| 755 | PRIV (pushed_size) = PRIV (output_size); |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | /* End record output. */ |
| 760 | |
| 761 | void |
| 762 | _bfd_vms_output_end (bfd * abfd) |
| 763 | { |
| 764 | #if VMS_DEBUG |
| 765 | vms_debug (6, "_bfd_vms_output_end\n"); |
| 766 | #endif |
| 767 | |
| 768 | _bfd_vms_output_flush (abfd); |
| 769 | } |
| 770 | |
| 771 | /* Check remaining buffer size |
| 772 | |
| 773 | Return what's left. */ |
| 774 | |
| 775 | int |
| 776 | _bfd_vms_output_check (bfd * abfd, int size) |
| 777 | { |
| 778 | #if VMS_DEBUG |
| 779 | vms_debug (6, "_bfd_vms_output_check (%d)\n", size); |
| 780 | #endif |
| 781 | |
| 782 | return (MAX_OUTREC_SIZE - (PRIV (output_size) + size + MIN_OUTREC_LUFT)); |
| 783 | } |
| 784 | |
| 785 | /* Output byte (8 bit) value. */ |
| 786 | |
| 787 | void |
| 788 | _bfd_vms_output_byte (bfd * abfd, unsigned int value) |
| 789 | { |
| 790 | #if VMS_DEBUG |
| 791 | vms_debug (6, "_bfd_vms_output_byte (%02x)\n", value); |
| 792 | #endif |
| 793 | |
| 794 | bfd_put_8 (abfd, value & 0xff, PRIV (output_buf) + PRIV (output_size)); |
| 795 | PRIV (output_size) += 1; |
| 796 | } |
| 797 | |
| 798 | /* Output short (16 bit) value. */ |
| 799 | |
| 800 | void |
| 801 | _bfd_vms_output_short (bfd * abfd, unsigned int value) |
| 802 | { |
| 803 | #if VMS_DEBUG |
| 804 | vms_debug (6, "_bfd_vms_output_short (%04x)\n", value); |
| 805 | #endif |
| 806 | |
| 807 | bfd_put_16 (abfd, (bfd_vma) value & 0xffff, |
| 808 | PRIV (output_buf) + PRIV (output_size)); |
| 809 | PRIV (output_size) += 2; |
| 810 | } |
| 811 | |
| 812 | /* Output long (32 bit) value. */ |
| 813 | |
| 814 | void |
| 815 | _bfd_vms_output_long (bfd * abfd, unsigned long value) |
| 816 | { |
| 817 | #if VMS_DEBUG |
| 818 | vms_debug (6, "_bfd_vms_output_long (%08lx)\n", value); |
| 819 | #endif |
| 820 | |
| 821 | bfd_put_32 (abfd, (bfd_vma) value, PRIV (output_buf) + PRIV (output_size)); |
| 822 | PRIV (output_size) += 4; |
| 823 | } |
| 824 | |
| 825 | /* Output quad (64 bit) value. */ |
| 826 | |
| 827 | void |
| 828 | _bfd_vms_output_quad (bfd * abfd, uquad value) |
| 829 | { |
| 830 | #if VMS_DEBUG |
| 831 | vms_debug (6, "_bfd_vms_output_quad (%016lx)\n", value); |
| 832 | #endif |
| 833 | |
| 834 | bfd_put_64(abfd, value, PRIV (output_buf) + PRIV (output_size)); |
| 835 | PRIV (output_size) += 8; |
| 836 | } |
| 837 | |
| 838 | /* Output c-string as counted string. */ |
| 839 | |
| 840 | void |
| 841 | _bfd_vms_output_counted (bfd * abfd, char *value) |
| 842 | { |
| 843 | int len; |
| 844 | |
| 845 | #if VMS_DEBUG |
| 846 | vms_debug (6, "_bfd_vms_output_counted (%s)\n", value); |
| 847 | #endif |
| 848 | |
| 849 | len = strlen (value); |
| 850 | if (len == 0) |
| 851 | { |
| 852 | (*_bfd_error_handler) (_("_bfd_vms_output_counted called with zero bytes")); |
| 853 | return; |
| 854 | } |
| 855 | if (len > 255) |
| 856 | { |
| 857 | (*_bfd_error_handler) (_("_bfd_vms_output_counted called with too many bytes")); |
| 858 | return; |
| 859 | } |
| 860 | _bfd_vms_output_byte (abfd, (unsigned int) len & 0xff); |
| 861 | _bfd_vms_output_dump (abfd, (unsigned char *) value, len); |
| 862 | } |
| 863 | |
| 864 | /* Output character area. */ |
| 865 | |
| 866 | void |
| 867 | _bfd_vms_output_dump (bfd * abfd, |
| 868 | unsigned char *data, |
| 869 | int length) |
| 870 | { |
| 871 | #if VMS_DEBUG |
| 872 | vms_debug (6, "_bfd_vms_output_dump (%d)\n", length); |
| 873 | #endif |
| 874 | |
| 875 | if (length == 0) |
| 876 | return; |
| 877 | |
| 878 | memcpy (PRIV (output_buf) + PRIV (output_size), data, (size_t) length); |
| 879 | PRIV (output_size) += length; |
| 880 | } |
| 881 | |
| 882 | /* Output count bytes of value. */ |
| 883 | |
| 884 | void |
| 885 | _bfd_vms_output_fill (bfd * abfd, |
| 886 | int value, |
| 887 | int count) |
| 888 | { |
| 889 | #if VMS_DEBUG |
| 890 | vms_debug (6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count); |
| 891 | #endif |
| 892 | |
| 893 | if (count == 0) |
| 894 | return; |
| 895 | memset (PRIV (output_buf) + PRIV (output_size), value, (size_t) count); |
| 896 | PRIV (output_size) += count; |
| 897 | } |
| 898 | |
| 899 | /* This hash routine borrowed from GNU-EMACS, and strengthened slightly. ERY. */ |
| 900 | |
| 901 | static int |
| 902 | hash_string (const char *ptr) |
| 903 | { |
| 904 | const unsigned char *p = (unsigned char *) ptr; |
| 905 | const unsigned char *end = p + strlen (ptr); |
| 906 | unsigned char c; |
| 907 | int hash = 0; |
| 908 | |
| 909 | while (p != end) |
| 910 | { |
| 911 | c = *p++; |
| 912 | hash = ((hash << 3) + (hash << 15) + (hash >> 28) + c); |
| 913 | } |
| 914 | return hash; |
| 915 | } |
| 916 | |
| 917 | /* Generate a length-hashed VMS symbol name (limited to maxlen chars). */ |
| 918 | |
| 919 | char * |
| 920 | _bfd_vms_length_hash_symbol (bfd * abfd, const char *in, int maxlen) |
| 921 | { |
| 922 | unsigned long result; |
| 923 | int in_len; |
| 924 | char *new_name; |
| 925 | const char *old_name; |
| 926 | int i; |
| 927 | static char outbuf[EOBJ_S_C_SYMSIZ+1]; |
| 928 | char *out = outbuf; |
| 929 | |
| 930 | #if VMS_DEBUG |
| 931 | vms_debug (4, "_bfd_vms_length_hash_symbol \"%s\"\n", in); |
| 932 | #endif |
| 933 | |
| 934 | if (maxlen > EOBJ_S_C_SYMSIZ) |
| 935 | maxlen = EOBJ_S_C_SYMSIZ; |
| 936 | |
| 937 | /* Save this for later. */ |
| 938 | new_name = out; |
| 939 | |
| 940 | /* We may need to truncate the symbol, save the hash for later. */ |
| 941 | in_len = strlen (in); |
| 942 | |
| 943 | result = (in_len > maxlen) ? hash_string (in) : 0; |
| 944 | |
| 945 | old_name = in; |
| 946 | |
| 947 | /* Do the length checking. */ |
| 948 | if (in_len <= maxlen) |
| 949 | i = in_len; |
| 950 | else |
| 951 | { |
| 952 | if (PRIV (flag_hash_long_names)) |
| 953 | i = maxlen-9; |
| 954 | else |
| 955 | i = maxlen; |
| 956 | } |
| 957 | |
| 958 | strncpy (out, in, (size_t) i); |
| 959 | in += i; |
| 960 | out += i; |
| 961 | |
| 962 | if ((in_len > maxlen) |
| 963 | && PRIV (flag_hash_long_names)) |
| 964 | sprintf (out, "_%08lx", result); |
| 965 | else |
| 966 | *out = 0; |
| 967 | |
| 968 | #if VMS_DEBUG |
| 969 | vms_debug (4, "--> [%d]\"%s\"\n", strlen (outbuf), outbuf); |
| 970 | #endif |
| 971 | |
| 972 | if (in_len > maxlen |
| 973 | && PRIV (flag_hash_long_names) |
| 974 | && PRIV (flag_show_after_trunc)) |
| 975 | printf (_("Symbol %s replaced by %s\n"), old_name, new_name); |
| 976 | |
| 977 | return outbuf; |
| 978 | } |
| 979 | |
| 980 | /* Allocate and initialize a new symbol. */ |
| 981 | |
| 982 | static asymbol * |
| 983 | new_symbol (bfd * abfd, char *name) |
| 984 | { |
| 985 | asymbol *symbol; |
| 986 | |
| 987 | #if VMS_DEBUG |
| 988 | _bfd_vms_debug (7, "new_symbol %s\n", name); |
| 989 | #endif |
| 990 | |
| 991 | symbol = bfd_make_empty_symbol (abfd); |
| 992 | if (symbol == 0) |
| 993 | return symbol; |
| 994 | symbol->name = name; |
| 995 | symbol->section = (asection *)(unsigned long)-1; |
| 996 | |
| 997 | return symbol; |
| 998 | } |
| 999 | |
| 1000 | /* Allocate and enter a new private symbol. */ |
| 1001 | |
| 1002 | vms_symbol_entry * |
| 1003 | _bfd_vms_enter_symbol (bfd * abfd, char *name) |
| 1004 | { |
| 1005 | vms_symbol_entry *entry; |
| 1006 | |
| 1007 | #if VMS_DEBUG |
| 1008 | _bfd_vms_debug (6, "_bfd_vms_enter_symbol %s\n", name); |
| 1009 | #endif |
| 1010 | |
| 1011 | entry = (vms_symbol_entry *) |
| 1012 | bfd_hash_lookup (PRIV (vms_symbol_table), name, FALSE, FALSE); |
| 1013 | if (entry == 0) |
| 1014 | { |
| 1015 | #if VMS_DEBUG |
| 1016 | _bfd_vms_debug (8, "creating hash entry for %s\n", name); |
| 1017 | #endif |
| 1018 | entry = (vms_symbol_entry *) bfd_hash_lookup (PRIV (vms_symbol_table), |
| 1019 | name, TRUE, FALSE); |
| 1020 | if (entry != 0) |
| 1021 | { |
| 1022 | asymbol *symbol; |
| 1023 | symbol = new_symbol (abfd, name); |
| 1024 | if (symbol != 0) |
| 1025 | { |
| 1026 | entry->symbol = symbol; |
| 1027 | PRIV (gsd_sym_count)++; |
| 1028 | abfd->symcount++; |
| 1029 | } |
| 1030 | else |
| 1031 | entry = 0; |
| 1032 | } |
| 1033 | else |
| 1034 | (*_bfd_error_handler) (_("failed to enter %s"), name); |
| 1035 | } |
| 1036 | else |
| 1037 | { |
| 1038 | #if VMS_DEBUG |
| 1039 | _bfd_vms_debug (8, "found hash entry for %s\n", name); |
| 1040 | #endif |
| 1041 | } |
| 1042 | |
| 1043 | #if VMS_DEBUG |
| 1044 | _bfd_vms_debug (7, "-> entry %p, entry->symbol %p\n", entry, entry->symbol); |
| 1045 | #endif |
| 1046 | return entry; |
| 1047 | } |