1 /* BFD back-end for PowerPC Microsoft Portable Executable files. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001 4 Free Software Foundation, Inc. 5 6 Original version pieced together by Kim Knuttila (krk@cygnus.com) 7 8 There is nothing new under the sun. This file draws a lot on other 9 coff files, in particular, those for the rs/6000, alpha, mips, and 10 intel backends, and the PE work for the arm. 11 12 This file is part of BFD, the Binary File Descriptor library. 13 14 This program is free software; you can redistribute it and/or modify 15 it under the terms of the GNU General Public License as published by 16 the Free Software Foundation; either version 2 of the License, or 17 (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 GNU General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, 59 Temple Place - Suite 330, 27 Boston, MA 02111-1307, USA. */ 28 29 /* Current State: 30 - objdump works 31 - relocs generated by gas 32 - ld will link files, but they do not run. 33 - dlltool will not produce correct output in some .reloc cases, and will 34 not produce the right glue code for dll function calls. 35 */ 36 37 #include "bfd.h" 38 #include "sysdep.h" 39 40 #include "libbfd.h" 41 42 #include "coff/powerpc.h" 43 #include "coff/internal.h" 44 45 #include "coff/pe.h" 46 47 #ifdef BADMAG 48 #undef BADMAG 49 #endif 50 51 #define BADMAG(x) PPCBADMAG(x) 52 53 #include "libcoff.h" 54 55 /* This file is compiled more than once, but we only compile the 56 final_link routine once. */ 57 extern boolean ppc_bfd_coff_final_link 58 PARAMS ((bfd *, struct bfd_link_info *)); 59 extern void dump_toc PARAMS ((PTR)); 60 61 /* The toc is a set of bfd_vma fields. We use the fact that valid */ 62 /* addresses are even (i.e. the bit representing "1" is off) to allow */ 63 /* us to encode a little extra information in the field */ 64 /* - Unallocated addresses are intialized to 1. */ 65 /* - Allocated addresses are even numbers. */ 66 /* The first time we actually write a reference to the toc in the bfd, */ 67 /* we want to record that fact in a fixup file (if it is asked for), so */ 68 /* we keep track of whether or not an address has been written by marking */ 69 /* the low order bit with a "1" upon writing */ 70 71 #define SET_UNALLOCATED(x) ((x) = 1) 72 #define IS_UNALLOCATED(x) ((x) == 1) 73 74 #define IS_WRITTEN(x) ((x) & 1) 75 #define MARK_AS_WRITTEN(x) ((x) |= 1) 76 #define MAKE_ADDR_AGAIN(x) ((x) &= ~1) 77 78 /* Turn on this check if you suspect something amiss in the hash tables */ 79 #ifdef DEBUG_HASH 80 81 /* Need a 7 char string for an eye catcher */ 82 #define EYE "krkjunk" 83 84 #define HASH_CHECK_DCL char eye_catcher[8]; 85 #define HASH_CHECK_INIT(ret) strcpy(ret->eye_catcher, EYE) 86 #define HASH_CHECK(addr) \ 87 if (strcmp(addr->eye_catcher, EYE) != 0) \ 88 { \ 89 fprintf (stderr,\ 90 _("File %s, line %d, Hash check failure, bad eye %8s\n"), \ 91 __FILE__, __LINE__, addr->eye_catcher); \ 92 abort (); \ 93 } 94 95 #else 96 97 #define HASH_CHECK_DCL 98 #define HASH_CHECK_INIT(ret) 99 #define HASH_CHECK(addr) 100 101 #endif 102 103 /* In order not to add an int to every hash table item for every coff 104 linker, we define our own hash table, derived from the coff one */ 105 106 /* PE linker hash table entries. */ 107 108 struct ppc_coff_link_hash_entry 109 { 110 struct coff_link_hash_entry root; /* First entry, as required */ 111 112 /* As we wonder around the relocs, we'll keep the assigned toc_offset 113 here */ 114 bfd_vma toc_offset; /* Our addition, as required */ 115 int symbol_is_glue; 116 unsigned long int glue_insn; 117 118 HASH_CHECK_DCL 119 }; 120 121 /* PE linker hash table. */ 122 123 struct ppc_coff_link_hash_table 124 { 125 struct coff_link_hash_table root; /* First entry, as required */ 126 }; 127 128 static struct bfd_hash_entry *ppc_coff_link_hash_newfunc 129 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, 130 const char *)); 131 static boolean ppc_coff_link_hash_table_init 132 PARAMS ((struct ppc_coff_link_hash_table *, bfd *, 133 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 134 struct bfd_hash_table *, 135 const char *))); 136 static struct bfd_link_hash_table *ppc_coff_link_hash_table_create 137 PARAMS ((bfd *)); 138 static boolean coff_ppc_relocate_section 139 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 140 struct internal_reloc *, struct internal_syment *, asection **)); 141 static reloc_howto_type *coff_ppc_rtype_to_howto 142 PARAMS ((bfd *, asection *, struct internal_reloc *, 143 struct coff_link_hash_entry *, struct internal_syment *, 144 bfd_vma *)); 145 146 /* Routine to create an entry in the link hash table. */ 147 148 static struct bfd_hash_entry * 149 ppc_coff_link_hash_newfunc (entry, table, string) 150 struct bfd_hash_entry *entry; 151 struct bfd_hash_table *table; 152 const char *string; 153 { 154 struct ppc_coff_link_hash_entry *ret = 155 (struct ppc_coff_link_hash_entry *) entry; 156 157 /* Allocate the structure if it has not already been allocated by a 158 subclass. */ 159 if (ret == (struct ppc_coff_link_hash_entry *) NULL) 160 ret = (struct ppc_coff_link_hash_entry *) 161 bfd_hash_allocate (table, 162 sizeof (struct ppc_coff_link_hash_entry)); 163 164 if (ret == (struct ppc_coff_link_hash_entry *) NULL) 165 return NULL; 166 167 /* Call the allocation method of the superclass. */ 168 ret = ((struct ppc_coff_link_hash_entry *) 169 _bfd_coff_link_hash_newfunc ((struct bfd_hash_entry *) ret, 170 table, string)); 171 172 if (ret) 173 { 174 /* Initialize the local fields. */ 175 SET_UNALLOCATED(ret->toc_offset); 176 ret->symbol_is_glue = 0; 177 ret->glue_insn = 0; 178 179 HASH_CHECK_INIT(ret); 180 } 181 182 return (struct bfd_hash_entry *) ret; 183 } 184 185 /* Initialize a PE linker hash table. */ 186 187 static boolean 188 ppc_coff_link_hash_table_init (table, abfd, newfunc) 189 struct ppc_coff_link_hash_table *table; 190 bfd *abfd; 191 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, 192 struct bfd_hash_table *, 193 const char *)); 194 { 195 return _bfd_coff_link_hash_table_init (&table->root, abfd, newfunc); 196 } 197 198 /* Create a PE linker hash table. */ 199 200 static struct bfd_link_hash_table * 201 ppc_coff_link_hash_table_create (abfd) 202 bfd *abfd; 203 { 204 struct ppc_coff_link_hash_table *ret; 205 206 ret = ((struct ppc_coff_link_hash_table *) 207 bfd_alloc (abfd, sizeof (struct ppc_coff_link_hash_table))); 208 if (ret == NULL) 209 return NULL; 210 if (! ppc_coff_link_hash_table_init (ret, abfd, 211 ppc_coff_link_hash_newfunc)) 212 { 213 bfd_release (abfd, ret); 214 return (struct bfd_link_hash_table *) NULL; 215 } 216 return &ret->root.root; 217 } 218 219 /* Now, tailor coffcode.h to use our hash stuff */ 220 221 #define coff_bfd_link_hash_table_create ppc_coff_link_hash_table_create 222 223 /* The nt loader points the toc register to &toc + 32768, in order to */ 224 /* use the complete range of a 16-bit displacement. We have to adjust */ 225 /* for this when we fix up loads displaced off the toc reg. */ 226 #define TOC_LOAD_ADJUSTMENT (-32768) 227 #define TOC_SECTION_NAME ".private.toc" 228 229 /* The main body of code is in coffcode.h. */ 230 231 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3) 232 233 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value 234 from smaller values. Start with zero, widen, *then* decrement. */ 235 #define MINUS_ONE (((bfd_vma)0) - 1) 236 237 /* these should definitely go in a header file somewhere... */ 238 239 /* NOP */ 240 #define IMAGE_REL_PPC_ABSOLUTE 0x0000 241 242 /* 64-bit address */ 243 #define IMAGE_REL_PPC_ADDR64 0x0001 244 245 /* 32-bit address */ 246 #define IMAGE_REL_PPC_ADDR32 0x0002 247 248 /* 26-bit address, shifted left 2 (branch absolute) */ 249 #define IMAGE_REL_PPC_ADDR24 0x0003 250 251 /* 16-bit address */ 252 #define IMAGE_REL_PPC_ADDR16 0x0004 253 254 /* 16-bit address, shifted left 2 (load doubleword) */ 255 #define IMAGE_REL_PPC_ADDR14 0x0005 256 257 /* 26-bit PC-relative offset, shifted left 2 (branch relative) */ 258 #define IMAGE_REL_PPC_REL24 0x0006 259 260 /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */ 261 #define IMAGE_REL_PPC_REL14 0x0007 262 263 /* 16-bit offset from TOC base */ 264 #define IMAGE_REL_PPC_TOCREL16 0x0008 265 266 /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */ 267 #define IMAGE_REL_PPC_TOCREL14 0x0009 268 269 /* 32-bit addr w/o image base */ 270 #define IMAGE_REL_PPC_ADDR32NB 0x000A 271 272 /* va of containing section (as in an image sectionhdr) */ 273 #define IMAGE_REL_PPC_SECREL 0x000B 274 275 /* sectionheader number */ 276 #define IMAGE_REL_PPC_SECTION 0x000C 277 278 /* substitute TOC restore instruction iff symbol is glue code */ 279 #define IMAGE_REL_PPC_IFGLUE 0x000D 280 281 /* symbol is glue code; virtual address is TOC restore instruction */ 282 #define IMAGE_REL_PPC_IMGLUE 0x000E 283 284 /* va of containing section (limited to 16 bits) */ 285 #define IMAGE_REL_PPC_SECREL16 0x000F 286 287 /* stuff to handle immediate data when the number of bits in the */ 288 /* data is greater than the number of bits in the immediate field */ 289 /* We need to do (usually) 32 bit arithmetic on 16 bit chunks */ 290 #define IMAGE_REL_PPC_REFHI 0x0010 291 #define IMAGE_REL_PPC_REFLO 0x0011 292 #define IMAGE_REL_PPC_PAIR 0x0012 293 294 /* This is essentially the same as tocrel16, with TOCDEFN assumed */ 295 #define IMAGE_REL_PPC_TOCREL16_DEFN 0x0013 296 297 /* Flag bits in IMAGE_RELOCATION.TYPE */ 298 299 /* subtract reloc value rather than adding it */ 300 #define IMAGE_REL_PPC_NEG 0x0100 301 302 /* fix branch prediction bit to predict branch taken */ 303 #define IMAGE_REL_PPC_BRTAKEN 0x0200 304 305 /* fix branch prediction bit to predict branch not taken */ 306 #define IMAGE_REL_PPC_BRNTAKEN 0x0400 307 308 /* toc slot defined in file (or, data in toc) */ 309 #define IMAGE_REL_PPC_TOCDEFN 0x0800 310 311 /* masks to isolate above values in IMAGE_RELOCATION.Type */ 312 #define IMAGE_REL_PPC_TYPEMASK 0x00FF 313 #define IMAGE_REL_PPC_FLAGMASK 0x0F00 314 315 #define EXTRACT_TYPE(x) ((x) & IMAGE_REL_PPC_TYPEMASK) 316 #define EXTRACT_FLAGS(x) ((x) & IMAGE_REL_PPC_FLAGMASK) 317 #define EXTRACT_JUNK(x) \ 318 ((x) & ~(IMAGE_REL_PPC_TYPEMASK | IMAGE_REL_PPC_FLAGMASK)) 319 320 /* static helper functions to make relocation work */ 321 /* (Work In Progress) */ 322 323 static bfd_reloc_status_type ppc_refhi_reloc PARAMS ((bfd *abfd, 324 arelent *reloc, 325 asymbol *symbol, 326 PTR data, 327 asection *section, 328 bfd *output_bfd, 329 char **error)); 330 #if 0 331 static bfd_reloc_status_type ppc_reflo_reloc PARAMS ((bfd *abfd, 332 arelent *reloc, 333 asymbol *symbol, 334 PTR data, 335 asection *section, 336 bfd *output_bfd, 337 char **error)); 338 #endif 339 static bfd_reloc_status_type ppc_pair_reloc PARAMS ((bfd *abfd, 340 arelent *reloc, 341 asymbol *symbol, 342 PTR data, 343 asection *section, 344 bfd *output_bfd, 345 char **error)); 346 347 static bfd_reloc_status_type ppc_toc16_reloc PARAMS ((bfd *abfd, 348 arelent *reloc, 349 asymbol *symbol, 350 PTR data, 351 asection *section, 352 bfd *output_bfd, 353 char **error)); 354 355 #if 0 356 static bfd_reloc_status_type ppc_addr32nb_reloc PARAMS ((bfd *abfd, 357 arelent *reloc, 358 asymbol *symbol, 359 PTR data, 360 asection *section, 361 bfd *output_bfd, 362 char **error)); 363 #endif 364 static bfd_reloc_status_type ppc_section_reloc PARAMS ((bfd *abfd, 365 arelent *reloc, 366 asymbol *symbol, 367 PTR data, 368 asection *section, 369 bfd *output_bfd, 370 char **error)); 371 372 static bfd_reloc_status_type ppc_secrel_reloc PARAMS ((bfd *abfd, 373 arelent *reloc, 374 asymbol *symbol, 375 PTR data, 376 asection *section, 377 bfd *output_bfd, 378 char **error)); 379 380 static bfd_reloc_status_type ppc_imglue_reloc PARAMS ((bfd *abfd, 381 arelent *reloc, 382 asymbol *symbol, 383 PTR data, 384 asection *section, 385 bfd *output_bfd, 386 char **error)); 387 388 static boolean in_reloc_p PARAMS((bfd *abfd, reloc_howto_type *howto)); 389 390 /* FIXME: It'll take a while to get through all of these. I only need a few to 391 get us started, so those I'll make sure work. Those marked FIXME are either 392 completely unverified or have a specific unknown marked in the comment */ 393 394 /*---------------------------------------------------------------------------*/ 395 /* */ 396 /* Relocation entries for Windows/NT on PowerPC. */ 397 /* */ 398 /* From the document "" we find the following listed as used relocs: */ 399 /* */ 400 /* ABSOLUTE : The noop */ 401 /* ADDR[64|32|16] : fields that hold addresses in data fields or the */ 402 /* 16 bit displacement field on a load/store. */ 403 /* ADDR[24|14] : fields that hold addresses in branch and cond */ 404 /* branches. These represent [26|16] bit addresses. */ 405 /* The low order 2 bits are preserved. */ 406 /* REL[24|14] : branches relative to the Instruction Address */ 407 /* register. These represent [26|16] bit addresses, */ 408 /* as before. The instruction field will be zero, and */ 409 /* the address of the SYM will be inserted at link time. */ 410 /* TOCREL16 : 16 bit displacement field referring to a slot in */ 411 /* toc. */ 412 /* TOCREL14 : 16 bit displacement field, similar to REL14 or ADDR14. */ 413 /* ADDR32NB : 32 bit address relative to the virtual origin. */ 414 /* (On the alpha, this is always a linker generated thunk)*/ 415 /* (i.e. 32bit addr relative to the image base) */ 416 /* SECREL : The value is relative to the start of the section */ 417 /* containing the symbol. */ 418 /* SECTION : access to the header containing the item. Supports the */ 419 /* codeview debugger. */ 420 /* */ 421 /* In particular, note that the document does not indicate that the */ 422 /* relocations listed in the header file are used. */ 423 /* */ 424 /* */ 425 /* */ 426 /*---------------------------------------------------------------------------*/ 427 428 static reloc_howto_type ppc_coff_howto_table[] = 429 { 430 /* IMAGE_REL_PPC_ABSOLUTE 0x0000 NOP */ 431 /* Unused: */ 432 HOWTO (IMAGE_REL_PPC_ABSOLUTE, /* type */ 433 0, /* rightshift */ 434 0, /* size (0 = byte, 1 = short, 2 = long) */ 435 0, /* bitsize */ 436 false, /* pc_relative */ 437 0, /* bitpos */ 438 complain_overflow_dont, /* dont complain_on_overflow */ 439 0, /* special_function */ 440 "ABSOLUTE", /* name */ 441 false, /* partial_inplace */ 442 0x00, /* src_mask */ 443 0x00, /* dst_mask */ 444 false), /* pcrel_offset */ 445 446 /* IMAGE_REL_PPC_ADDR64 0x0001 64-bit address */ 447 /* Unused: */ 448 HOWTO(IMAGE_REL_PPC_ADDR64, /* type */ 449 0, /* rightshift */ 450 3, /* size (0 = byte, 1 = short, 2 = long) */ 451 64, /* bitsize */ 452 false, /* pc_relative */ 453 0, /* bitpos */ 454 complain_overflow_bitfield, /* complain_on_overflow */ 455 0, /* special_function */ 456 "ADDR64", /* name */ 457 true, /* partial_inplace */ 458 MINUS_ONE, /* src_mask */ 459 MINUS_ONE, /* dst_mask */ 460 false), /* pcrel_offset */ 461 462 /* IMAGE_REL_PPC_ADDR32 0x0002 32-bit address */ 463 /* Used: */ 464 HOWTO (IMAGE_REL_PPC_ADDR32, /* type */ 465 0, /* rightshift */ 466 2, /* size (0 = byte, 1 = short, 2 = long) */ 467 32, /* bitsize */ 468 false, /* pc_relative */ 469 0, /* bitpos */ 470 complain_overflow_bitfield, /* complain_on_overflow */ 471 0, /* special_function */ 472 "ADDR32", /* name */ 473 true, /* partial_inplace */ 474 0xffffffff, /* src_mask */ 475 0xffffffff, /* dst_mask */ 476 false), /* pcrel_offset */ 477 478 /* IMAGE_REL_PPC_ADDR24 0x0003 26-bit address, shifted left 2 (branch absolute) */ 479 /* the LI field is in bit 6 through bit 29 is 24 bits, + 2 for the shift */ 480 /* Of course, That's the IBM approved bit numbering, which is not what */ 481 /* anyone else uses.... The li field is in bit 2 thru 25 */ 482 /* Used: */ 483 HOWTO (IMAGE_REL_PPC_ADDR24, /* type */ 484 0, /* rightshift */ 485 2, /* size (0 = byte, 1 = short, 2 = long) */ 486 26, /* bitsize */ 487 false, /* pc_relative */ 488 0, /* bitpos */ 489 complain_overflow_bitfield, /* complain_on_overflow */ 490 0, /* special_function */ 491 "ADDR24", /* name */ 492 true, /* partial_inplace */ 493 0x07fffffc, /* src_mask */ 494 0x07fffffc, /* dst_mask */ 495 false), /* pcrel_offset */ 496 497 /* IMAGE_REL_PPC_ADDR16 0x0004 16-bit address */ 498 /* Used: */ 499 HOWTO (IMAGE_REL_PPC_ADDR16, /* type */ 500 0, /* rightshift */ 501 1, /* size (0 = byte, 1 = short, 2 = long) */ 502 16, /* bitsize */ 503 false, /* pc_relative */ 504 0, /* bitpos */ 505 complain_overflow_signed, /* complain_on_overflow */ 506 0, /* special_function */ 507 "ADDR16", /* name */ 508 true, /* partial_inplace */ 509 0xffff, /* src_mask */ 510 0xffff, /* dst_mask */ 511 false), /* pcrel_offset */ 512 513 /* IMAGE_REL_PPC_ADDR14 0x0005 */ 514 /* 16-bit address, shifted left 2 (load doubleword) */ 515 /* FIXME: the mask is likely wrong, and the bit position may be as well */ 516 /* Unused: */ 517 HOWTO (IMAGE_REL_PPC_ADDR14, /* type */ 518 1, /* rightshift */ 519 1, /* size (0 = byte, 1 = short, 2 = long) */ 520 16, /* bitsize */ 521 false, /* pc_relative */ 522 0, /* bitpos */ 523 complain_overflow_signed, /* complain_on_overflow */ 524 0, /* special_function */ 525 "ADDR16", /* name */ 526 true, /* partial_inplace */ 527 0xffff, /* src_mask */ 528 0xffff, /* dst_mask */ 529 false), /* pcrel_offset */ 530 531 /* IMAGE_REL_PPC_REL24 0x0006 */ 532 /* 26-bit PC-relative offset, shifted left 2 (branch relative) */ 533 /* Used: */ 534 HOWTO (IMAGE_REL_PPC_REL24, /* type */ 535 0, /* rightshift */ 536 2, /* size (0 = byte, 1 = short, 2 = long) */ 537 26, /* bitsize */ 538 true, /* pc_relative */ 539 0, /* bitpos */ 540 complain_overflow_signed, /* complain_on_overflow */ 541 0, /* special_function */ 542 "REL24", /* name */ 543 true, /* partial_inplace */ 544 0x3fffffc, /* src_mask */ 545 0x3fffffc, /* dst_mask */ 546 false), /* pcrel_offset */ 547 548 /* IMAGE_REL_PPC_REL14 0x0007 */ 549 /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */ 550 /* FIXME: the mask is likely wrong, and the bit position may be as well */ 551 /* FIXME: how does it know how far to shift? */ 552 /* Unused: */ 553 HOWTO (IMAGE_REL_PPC_ADDR14, /* type */ 554 1, /* rightshift */ 555 1, /* size (0 = byte, 1 = short, 2 = long) */ 556 16, /* bitsize */ 557 false, /* pc_relative */ 558 0, /* bitpos */ 559 complain_overflow_signed, /* complain_on_overflow */ 560 0, /* special_function */ 561 "ADDR16", /* name */ 562 true, /* partial_inplace */ 563 0xffff, /* src_mask */ 564 0xffff, /* dst_mask */ 565 true), /* pcrel_offset */ 566 567 /* IMAGE_REL_PPC_TOCREL16 0x0008 */ 568 /* 16-bit offset from TOC base */ 569 /* Used: */ 570 HOWTO (IMAGE_REL_PPC_TOCREL16,/* type */ 571 0, /* rightshift */ 572 1, /* size (0 = byte, 1 = short, 2 = long) */ 573 16, /* bitsize */ 574 false, /* pc_relative */ 575 0, /* bitpos */ 576 complain_overflow_dont, /* complain_on_overflow */ 577 ppc_toc16_reloc, /* special_function */ 578 "TOCREL16", /* name */ 579 false, /* partial_inplace */ 580 0xffff, /* src_mask */ 581 0xffff, /* dst_mask */ 582 false), /* pcrel_offset */ 583 584 /* IMAGE_REL_PPC_TOCREL14 0x0009 */ 585 /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */ 586 /* Unused: */ 587 HOWTO (IMAGE_REL_PPC_TOCREL14,/* type */ 588 1, /* rightshift */ 589 1, /* size (0 = byte, 1 = short, 2 = long) */ 590 16, /* bitsize */ 591 false, /* pc_relative */ 592 0, /* bitpos */ 593 complain_overflow_signed, /* complain_on_overflow */ 594 0, /* special_function */ 595 "TOCREL14", /* name */ 596 false, /* partial_inplace */ 597 0xffff, /* src_mask */ 598 0xffff, /* dst_mask */ 599 false), /* pcrel_offset */ 600 601 /* IMAGE_REL_PPC_ADDR32NB 0x000A */ 602 /* 32-bit addr w/ image base */ 603 /* Unused: */ 604 HOWTO (IMAGE_REL_PPC_ADDR32NB,/* type */ 605 0, /* rightshift */ 606 2, /* size (0 = byte, 1 = short, 2 = long) */ 607 32, /* bitsize */ 608 false, /* pc_relative */ 609 0, /* bitpos */ 610 complain_overflow_signed, /* complain_on_overflow */ 611 0, /* special_function */ 612 "ADDR32NB", /* name */ 613 true, /* partial_inplace */ 614 0xffffffff, /* src_mask */ 615 0xffffffff, /* dst_mask */ 616 false), /* pcrel_offset */ 617 618 /* IMAGE_REL_PPC_SECREL 0x000B */ 619 /* va of containing section (as in an image sectionhdr) */ 620 /* Unused: */ 621 HOWTO (IMAGE_REL_PPC_SECREL,/* type */ 622 0, /* rightshift */ 623 2, /* size (0 = byte, 1 = short, 2 = long) */ 624 32, /* bitsize */ 625 false, /* pc_relative */ 626 0, /* bitpos */ 627 complain_overflow_signed, /* complain_on_overflow */ 628 ppc_secrel_reloc, /* special_function */ 629 "SECREL", /* name */ 630 true, /* partial_inplace */ 631 0xffffffff, /* src_mask */ 632 0xffffffff, /* dst_mask */ 633 true), /* pcrel_offset */ 634 635 /* IMAGE_REL_PPC_SECTION 0x000C */ 636 /* sectionheader number */ 637 /* Unused: */ 638 HOWTO (IMAGE_REL_PPC_SECTION,/* type */ 639 0, /* rightshift */ 640 2, /* size (0 = byte, 1 = short, 2 = long) */ 641 32, /* bitsize */ 642 false, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_signed, /* complain_on_overflow */ 645 ppc_section_reloc, /* special_function */ 646 "SECTION", /* name */ 647 true, /* partial_inplace */ 648 0xffffffff, /* src_mask */ 649 0xffffffff, /* dst_mask */ 650 true), /* pcrel_offset */ 651 652 /* IMAGE_REL_PPC_IFGLUE 0x000D */ 653 /* substitute TOC restore instruction iff symbol is glue code */ 654 /* Used: */ 655 HOWTO (IMAGE_REL_PPC_IFGLUE,/* type */ 656 0, /* rightshift */ 657 2, /* size (0 = byte, 1 = short, 2 = long) */ 658 32, /* bitsize */ 659 false, /* pc_relative */ 660 0, /* bitpos */ 661 complain_overflow_signed, /* complain_on_overflow */ 662 0, /* special_function */ 663 "IFGLUE", /* name */ 664 true, /* partial_inplace */ 665 0xffffffff, /* src_mask */ 666 0xffffffff, /* dst_mask */ 667 false), /* pcrel_offset */ 668 669 /* IMAGE_REL_PPC_IMGLUE 0x000E */ 670 /* symbol is glue code; virtual address is TOC restore instruction */ 671 /* Unused: */ 672 HOWTO (IMAGE_REL_PPC_IMGLUE,/* type */ 673 0, /* rightshift */ 674 2, /* size (0 = byte, 1 = short, 2 = long) */ 675 32, /* bitsize */ 676 false, /* pc_relative */ 677 0, /* bitpos */ 678 complain_overflow_dont, /* complain_on_overflow */ 679 ppc_imglue_reloc, /* special_function */ 680 "IMGLUE", /* name */ 681 false, /* partial_inplace */ 682 0xffffffff, /* src_mask */ 683 0xffffffff, /* dst_mask */ 684 false), /* pcrel_offset */ 685 686 /* IMAGE_REL_PPC_SECREL16 0x000F */ 687 /* va of containing section (limited to 16 bits) */ 688 /* Unused: */ 689 HOWTO (IMAGE_REL_PPC_SECREL16,/* type */ 690 0, /* rightshift */ 691 1, /* size (0 = byte, 1 = short, 2 = long) */ 692 16, /* bitsize */ 693 false, /* pc_relative */ 694 0, /* bitpos */ 695 complain_overflow_signed, /* complain_on_overflow */ 696 0, /* special_function */ 697 "SECREL16", /* name */ 698 true, /* partial_inplace */ 699 0xffff, /* src_mask */ 700 0xffff, /* dst_mask */ 701 true), /* pcrel_offset */ 702 703 /* IMAGE_REL_PPC_REFHI 0x0010 */ 704 /* Unused: */ 705 HOWTO (IMAGE_REL_PPC_REFHI, /* type */ 706 0, /* rightshift */ 707 1, /* size (0 = byte, 1 = short, 2 = long) */ 708 16, /* bitsize */ 709 false, /* pc_relative */ 710 0, /* bitpos */ 711 complain_overflow_signed, /* complain_on_overflow */ 712 ppc_refhi_reloc, /* special_function */ 713 "REFHI", /* name */ 714 true, /* partial_inplace */ 715 0xffffffff, /* src_mask */ 716 0xffffffff, /* dst_mask */ 717 false), /* pcrel_offset */ 718 719 /* IMAGE_REL_PPC_REFLO 0x0011 */ 720 /* Unused: */ 721 HOWTO (IMAGE_REL_PPC_REFLO, /* type */ 722 0, /* rightshift */ 723 1, /* size (0 = byte, 1 = short, 2 = long) */ 724 16, /* bitsize */ 725 false, /* pc_relative */ 726 0, /* bitpos */ 727 complain_overflow_signed, /* complain_on_overflow */ 728 ppc_refhi_reloc, /* special_function */ 729 "REFLO", /* name */ 730 true, /* partial_inplace */ 731 0xffffffff, /* src_mask */ 732 0xffffffff, /* dst_mask */ 733 false), /* pcrel_offset */ 734 735 /* IMAGE_REL_PPC_PAIR 0x0012 */ 736 /* Unused: */ 737 HOWTO (IMAGE_REL_PPC_PAIR, /* type */ 738 0, /* rightshift */ 739 1, /* size (0 = byte, 1 = short, 2 = long) */ 740 16, /* bitsize */ 741 false, /* pc_relative */ 742 0, /* bitpos */ 743 complain_overflow_signed, /* complain_on_overflow */ 744 ppc_pair_reloc, /* special_function */ 745 "PAIR", /* name */ 746 true, /* partial_inplace */ 747 0xffffffff, /* src_mask */ 748 0xffffffff, /* dst_mask */ 749 false), /* pcrel_offset */ 750 751 /* IMAGE_REL_PPC_TOCREL16_DEFN 0x0013 */ 752 /* 16-bit offset from TOC base, without causing a definition */ 753 /* Used: */ 754 HOWTO ( (IMAGE_REL_PPC_TOCREL16 | IMAGE_REL_PPC_TOCDEFN), /* type */ 755 0, /* rightshift */ 756 1, /* size (0 = byte, 1 = short, 2 = long) */ 757 16, /* bitsize */ 758 false, /* pc_relative */ 759 0, /* bitpos */ 760 complain_overflow_dont, /* complain_on_overflow */ 761 0, /* special_function */ 762 "TOCREL16, TOCDEFN", /* name */ 763 false, /* partial_inplace */ 764 0xffff, /* src_mask */ 765 0xffff, /* dst_mask */ 766 false), /* pcrel_offset */ 767 768 }; 769 770 /* Some really cheezy macros that can be turned on to test stderr :-) */ 771 772 #ifdef DEBUG_RELOC 773 #define UN_IMPL(x) \ 774 { \ 775 static int i; \ 776 if (i == 0) \ 777 { \ 778 i = 1; \ 779 fprintf (stderr,_("Unimplemented Relocation -- %s\n"),x); \ 780 } \ 781 } 782 783 #define DUMP_RELOC(n,r) \ 784 { \ 785 fprintf (stderr,"%s sym %d, addr %d, addend %d\n", \ 786 n, (*(r->sym_ptr_ptr))->name, \ 787 r->address, r->addend); \ 788 } 789 790 /* Given a reloc name, n, and a pointer to an internal_reloc, 791 dump out interesting information on the contents 792 793 #define n_name _n._n_name 794 #define n_zeroes _n._n_n._n_zeroes 795 #define n_offset _n._n_n._n_offset 796 797 */ 798 799 #define DUMP_RELOC2(n,r) \ 800 { \ 801 fprintf (stderr,"%s sym %d, r_vaddr %d %s\n", \ 802 n, r->r_symndx, r->r_vaddr,\ 803 (((r->r_type) & IMAGE_REL_PPC_TOCDEFN) == 0) \ 804 ?" ":" TOCDEFN" ); \ 805 } 806 807 #else 808 #define UN_IMPL(x) 809 #define DUMP_RELOC(n,r) 810 #define DUMP_RELOC2(n,r) 811 #endif 812 813 /* toc construction and management routines */ 814 815 /* This file is compiled twice, and these variables are defined in one 816 of the compilations. FIXME: This is confusing and weird. Also, 817 BFD should not use global variables. */ 818 extern bfd* bfd_of_toc_owner; 819 extern long int global_toc_size; 820 821 extern long int import_table_size; 822 extern long int first_thunk_address; 823 extern long int thunk_size; 824 825 enum toc_type 826 { 827 default_toc, 828 toc_32, 829 toc_64 830 }; 831 832 enum ref_category 833 { 834 priv, 835 pub, 836 data 837 }; 838 839 struct list_ele 840 { 841 struct list_ele *next; 842 bfd_vma addr; 843 enum ref_category cat; 844 int offset; 845 const char *name; 846 }; 847 848 extern struct list_ele *head; 849 extern struct list_ele *tail; 850 851 static void record_toc 852 PARAMS ((asection *, int, enum ref_category, const char *)); 853 854 static void 855 record_toc (toc_section, our_toc_offset, cat, name) 856 asection *toc_section; 857 int our_toc_offset; 858 enum ref_category cat; 859 const char *name; 860 { 861 /* add this entry to our toc addr-offset-name list */ 862 struct list_ele *t; 863 t = (struct list_ele *) bfd_malloc (sizeof (struct list_ele)); 864 if (t == NULL) 865 abort (); 866 t->next = 0; 867 t->offset = our_toc_offset; 868 t->name = name; 869 t->cat = cat; 870 t->addr = toc_section->output_offset + our_toc_offset; 871 872 if (head == 0) 873 { 874 head = t; 875 tail = t; 876 } 877 else 878 { 879 tail->next = t; 880 tail = t; 881 } 882 } 883 884 #ifdef COFF_IMAGE_WITH_PE 885 886 static boolean ppc_record_toc_entry 887 PARAMS ((bfd *, struct bfd_link_info *, asection *, int, enum toc_type)); 888 static void ppc_mark_symbol_as_glue 889 PARAMS ((bfd *, int, struct internal_reloc *)); 890 891 /* record a toc offset against a symbol */ 892 static boolean 893 ppc_record_toc_entry(abfd, info, sec, sym, toc_kind) 894 bfd *abfd; 895 struct bfd_link_info *info ATTRIBUTE_UNUSED; 896 asection *sec ATTRIBUTE_UNUSED; 897 int sym; 898 enum toc_type toc_kind ATTRIBUTE_UNUSED; 899 { 900 struct ppc_coff_link_hash_entry *h; 901 const char *name; 902 903 int *local_syms; 904 905 h = 0; 906 907 h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]); 908 if (h != 0) 909 { 910 HASH_CHECK(h); 911 } 912 913 if (h == 0) 914 { 915 local_syms = obj_coff_local_toc_table(abfd); 916 if (local_syms == 0) 917 { 918 unsigned int i; 919 /* allocate a table */ 920 local_syms = 921 (int *) bfd_zalloc (abfd, 922 obj_raw_syment_count(abfd) * sizeof (int)); 923 if (local_syms == 0) 924 return false; 925 obj_coff_local_toc_table(abfd) = local_syms; 926 for (i = 0; i < obj_raw_syment_count(abfd); ++i) 927 { 928 SET_UNALLOCATED(local_syms[i]); 929 } 930 } 931 932 if (IS_UNALLOCATED(local_syms[sym])) 933 { 934 local_syms[sym] = global_toc_size; 935 global_toc_size += 4; 936 937 /* The size must fit in a 16bit displacment */ 938 if (global_toc_size > 65535) 939 { 940 (*_bfd_error_handler) (_("TOC overflow")); 941 bfd_set_error (bfd_error_file_too_big); 942 return false; 943 } 944 } 945 } 946 else 947 { 948 name = h->root.root.root.string; 949 950 /* check to see if there's a toc slot allocated. If not, do it 951 here. It will be used in relocate_section */ 952 if (IS_UNALLOCATED(h->toc_offset)) 953 { 954 h->toc_offset = global_toc_size; 955 global_toc_size += 4; 956 957 /* The size must fit in a 16bit displacment */ 958 if (global_toc_size >= 65535) 959 { 960 (*_bfd_error_handler) (_("TOC overflow")); 961 bfd_set_error (bfd_error_file_too_big); 962 return false; 963 } 964 } 965 } 966 967 return true; 968 } 969 970 /* record a toc offset against a symbol */ 971 static void 972 ppc_mark_symbol_as_glue(abfd, sym, rel) 973 bfd *abfd; 974 int sym; 975 struct internal_reloc *rel; 976 { 977 struct ppc_coff_link_hash_entry *h; 978 979 h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]); 980 981 HASH_CHECK(h); 982 983 h->symbol_is_glue = 1; 984 h->glue_insn = bfd_get_32 (abfd, (bfd_byte *) &rel->r_vaddr); 985 986 return; 987 } 988 989 #endif /* COFF_IMAGE_WITH_PE */ 990 991 /* Return true if this relocation should 992 appear in the output .reloc section. */ 993 994 static boolean in_reloc_p(abfd, howto) 995 bfd * abfd ATTRIBUTE_UNUSED; 996 reloc_howto_type *howto; 997 { 998 return 999 (! howto->pc_relative) 1000 && (howto->type != IMAGE_REL_PPC_ADDR32NB) 1001 && (howto->type != IMAGE_REL_PPC_TOCREL16) 1002 && (howto->type != IMAGE_REL_PPC_IMGLUE) 1003 && (howto->type != IMAGE_REL_PPC_IFGLUE) 1004 && (howto->type != IMAGE_REL_PPC_SECREL) 1005 && (howto->type != IMAGE_REL_PPC_SECTION) 1006 && (howto->type != IMAGE_REL_PPC_SECREL16) 1007 && (howto->type != IMAGE_REL_PPC_REFHI) 1008 && (howto->type != IMAGE_REL_PPC_REFLO) 1009 && (howto->type != IMAGE_REL_PPC_PAIR) 1010 && (howto->type != IMAGE_REL_PPC_TOCREL16_DEFN) ; 1011 } 1012 1013 #if 0 1014 1015 /* this function is in charge of performing all the ppc PE relocations */ 1016 /* Don't yet know if we want to do this this particular way ... (krk) */ 1017 /* FIXME: (it is not yet enabled) */ 1018 1019 static bfd_reloc_status_type 1020 pe_ppc_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, 1021 error_message) 1022 bfd *abfd; 1023 arelent *reloc_entry; 1024 asymbol *symbol_in; 1025 PTR data; 1026 asection *input_section; 1027 bfd *output_bfd; 1028 char **error_message; 1029 { 1030 /* the consth relocation comes in two parts, we have to remember 1031 the state between calls, in these variables */ 1032 static boolean part1_consth_active = false; 1033 static unsigned long part1_consth_value; 1034 1035 unsigned long sym_value; 1036 unsigned short r_type; 1037 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ 1038 1039 r_type = reloc_entry->howto->type; 1040 1041 if (output_bfd) 1042 { 1043 /* Partial linking - do nothing */ 1044 reloc_entry->address += input_section->output_offset; 1045 return bfd_reloc_ok; 1046 } 1047 1048 if (symbol_in != NULL 1049 && bfd_is_und_section (symbol_in->section)) 1050 { 1051 /* Keep the state machine happy in case we're called again */ 1052 if (r_type == IMAGE_REL_PPC_REFHI) 1053 { 1054 part1_consth_active = true; 1055 part1_consth_value = 0; 1056 } 1057 return(bfd_reloc_undefined); 1058 } 1059 1060 if ((part1_consth_active) && (r_type != IMAGE_REL_PPC_PAIR)) 1061 { 1062 part1_consth_active = false; 1063 *error_message = (char *) _("Missing PAIR"); 1064 return(bfd_reloc_dangerous); 1065 } 1066 1067 sym_value = get_symbol_value(symbol_in); 1068 1069 return(bfd_reloc_ok); 1070 } 1071 1072 #endif /* 0 */ 1073 1074 /* The reloc processing routine for the optimized COFF linker. */ 1075 1076 static boolean 1077 coff_ppc_relocate_section (output_bfd, info, input_bfd, input_section, 1078 contents, relocs, syms, sections) 1079 bfd *output_bfd; 1080 struct bfd_link_info *info; 1081 bfd *input_bfd; 1082 asection *input_section; 1083 bfd_byte *contents; 1084 struct internal_reloc *relocs; 1085 struct internal_syment *syms; 1086 asection **sections; 1087 { 1088 struct internal_reloc *rel; 1089 struct internal_reloc *relend; 1090 boolean hihalf; 1091 bfd_vma hihalf_val; 1092 asection *toc_section = 0; 1093 bfd_vma relocation; 1094 reloc_howto_type *howto = 0; 1095 1096 /* If we are performing a relocateable link, we don't need to do a 1097 thing. The caller will take care of adjusting the reloc 1098 addresses and symbol indices. */ 1099 if (info->relocateable) 1100 return true; 1101 1102 hihalf = false; 1103 hihalf_val = 0; 1104 1105 rel = relocs; 1106 relend = rel + input_section->reloc_count; 1107 for (; rel < relend; rel++) 1108 { 1109 long symndx; 1110 struct ppc_coff_link_hash_entry *h; 1111 struct internal_syment *sym; 1112 bfd_vma val; 1113 1114 asection *sec; 1115 bfd_reloc_status_type rstat; 1116 bfd_byte *loc; 1117 1118 unsigned short r_type = EXTRACT_TYPE (rel->r_type); 1119 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type); 1120 1121 symndx = rel->r_symndx; 1122 loc = contents + rel->r_vaddr - input_section->vma; 1123 1124 /* FIXME: check bounds on r_type */ 1125 howto = ppc_coff_howto_table + r_type; 1126 1127 if (symndx == -1) 1128 { 1129 h = NULL; 1130 sym = NULL; 1131 } 1132 else 1133 { 1134 h = (struct ppc_coff_link_hash_entry *) 1135 (obj_coff_sym_hashes (input_bfd)[symndx]); 1136 if (h != 0) 1137 { 1138 HASH_CHECK(h); 1139 } 1140 1141 sym = syms + symndx; 1142 } 1143 1144 if (r_type == IMAGE_REL_PPC_IMGLUE && h == 0) 1145 { 1146 /* An IMGLUE reloc must have a name. Something is very wrong. */ 1147 abort (); 1148 } 1149 1150 sec = NULL; 1151 val = 0; 1152 1153 /* FIXME: PAIR unsupported in the following code */ 1154 if (h == NULL) 1155 { 1156 if (symndx == -1) 1157 sec = bfd_abs_section_ptr; 1158 else 1159 { 1160 sec = sections[symndx]; 1161 val = (sec->output_section->vma 1162 + sec->output_offset 1163 + sym->n_value); 1164 if (! obj_pe (output_bfd)) 1165 val -= sec->vma; 1166 } 1167 } 1168 else 1169 { 1170 HASH_CHECK(h); 1171 1172 if (h->root.root.type == bfd_link_hash_defined 1173 || h->root.root.type == bfd_link_hash_defweak) 1174 { 1175 sec = h->root.root.u.def.section; 1176 val = (h->root.root.u.def.value 1177 + sec->output_section->vma 1178 + sec->output_offset); 1179 } 1180 else 1181 { 1182 if (! ((*info->callbacks->undefined_symbol) 1183 (info, h->root.root.root.string, input_bfd, input_section, 1184 rel->r_vaddr - input_section->vma, true))) 1185 return false; 1186 } 1187 } 1188 1189 rstat = bfd_reloc_ok; 1190 1191 /* Each case must do its own relocation, setting rstat appropriately */ 1192 switch (r_type) 1193 { 1194 default: 1195 (*_bfd_error_handler) 1196 (_("%s: unsupported relocation type 0x%02x"), 1197 bfd_get_filename (input_bfd), r_type); 1198 bfd_set_error (bfd_error_bad_value); 1199 return false; 1200 case IMAGE_REL_PPC_TOCREL16: 1201 { 1202 bfd_vma our_toc_offset; 1203 int fixit; 1204 1205 DUMP_RELOC2(howto->name, rel); 1206 1207 if (toc_section == 0) 1208 { 1209 toc_section = bfd_get_section_by_name (bfd_of_toc_owner, 1210 TOC_SECTION_NAME); 1211 1212 if ( toc_section == NULL ) 1213 { 1214 /* There is no toc section. Something is very wrong. */ 1215 abort (); 1216 } 1217 } 1218 1219 /* 1220 * Amazing bit tricks present. As we may have seen earlier, we 1221 * use the 1 bit to tell us whether or not a toc offset has been 1222 * allocated. Now that they've all been allocated, we will use 1223 * the 1 bit to tell us if we've written this particular toc 1224 * entry out. 1225 */ 1226 fixit = false; 1227 if (h == 0) 1228 { /* it is a file local symbol */ 1229 int *local_toc_table; 1230 const char *name; 1231 1232 sym = syms + symndx; 1233 name = sym->_n._n_name; 1234 1235 local_toc_table = obj_coff_local_toc_table(input_bfd); 1236 our_toc_offset = local_toc_table[symndx]; 1237 1238 if (IS_WRITTEN(our_toc_offset)) 1239 { 1240 /* if it has been written out, it is marked with the 1241 1 bit. Fix up our offset, but do not write it out 1242 again. 1243 */ 1244 MAKE_ADDR_AGAIN(our_toc_offset); 1245 } 1246 else 1247 { 1248 /* write out the toc entry */ 1249 record_toc(toc_section, 1250 our_toc_offset, 1251 priv, 1252 strdup(name)); 1253 1254 bfd_put_32 (output_bfd, 1255 val, 1256 toc_section->contents + our_toc_offset); 1257 1258 MARK_AS_WRITTEN(local_toc_table[symndx]); 1259 fixit = true; 1260 } 1261 } 1262 else 1263 { 1264 const char *name = h->root.root.root.string; 1265 our_toc_offset = h->toc_offset; 1266 1267 if ((r_flags & IMAGE_REL_PPC_TOCDEFN) 1268 == IMAGE_REL_PPC_TOCDEFN ) 1269 { 1270 /* This is unbelievable cheese. Some knowledgable asm 1271 hacker has decided to use r2 as a base for loading 1272 a value. He/She does this by setting the tocdefn bit, 1273 and not supplying a toc definition. The behaviour is 1274 then to use the difference between the value of the 1275 symbol and the actual location of the toc as the toc 1276 index. 1277 1278 In fact, what is usually happening is, because the 1279 Import Address Table is mapped immediately following 1280 the toc, some trippy library code trying for speed on 1281 dll linkage, takes advantage of that and considers 1282 the IAT to be part of the toc, thus saving a load. 1283 */ 1284 1285 our_toc_offset = val - 1286 (toc_section->output_section->vma + 1287 toc_section->output_offset); 1288 1289 /* The size must still fit in a 16bit displacment */ 1290 if (our_toc_offset >= 65535) 1291 { 1292 (*_bfd_error_handler) 1293 (_("%s: Relocation for %s of %x exceeds Toc size limit"), 1294 bfd_get_filename (input_bfd), name, our_toc_offset); 1295 bfd_set_error (bfd_error_bad_value); 1296 return false; 1297 } 1298 1299 record_toc(toc_section, our_toc_offset, pub, strdup(name)); 1300 } 1301 else if (IS_WRITTEN(our_toc_offset)) 1302 { 1303 /* if it has been written out, it is marked with the 1304 1 bit. Fix up our offset, but do not write it out 1305 again. 1306 */ 1307 MAKE_ADDR_AGAIN(our_toc_offset); 1308 } 1309 else 1310 { 1311 record_toc(toc_section, our_toc_offset, pub, strdup(name)); 1312 1313 /* write out the toc entry */ 1314 bfd_put_32 (output_bfd, 1315 val, 1316 toc_section->contents + our_toc_offset); 1317 1318 MARK_AS_WRITTEN(h->toc_offset); 1319 /* The tricky part is that this is the address that */ 1320 /* needs a .reloc entry for it */ 1321 fixit = true; 1322 } 1323 } 1324 1325 if (fixit && info->base_file) 1326 { 1327 /* So if this is non pcrelative, and is referenced 1328 to a section or a common symbol, then it needs a reloc */ 1329 1330 /* relocation to a symbol in a section which 1331 isn't absolute - we output the address here 1332 to a file */ 1333 1334 bfd_vma addr = toc_section->output_section->vma 1335 + toc_section->output_offset + our_toc_offset; 1336 1337 if (coff_data(output_bfd)->pe) 1338 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; 1339 1340 fwrite (&addr, 1,4, (FILE *) info->base_file); 1341 } 1342 1343 /* FIXME: this test is conservative */ 1344 if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN && 1345 our_toc_offset > toc_section->_raw_size) 1346 { 1347 (*_bfd_error_handler) 1348 (_("%s: Relocation exceeds allocated TOC (%x)"), 1349 bfd_get_filename (input_bfd), 1350 toc_section->_raw_size); 1351 bfd_set_error (bfd_error_bad_value); 1352 return false; 1353 } 1354 1355 /* Now we know the relocation for this toc reference */ 1356 relocation = our_toc_offset + TOC_LOAD_ADJUSTMENT; 1357 rstat = _bfd_relocate_contents (howto, 1358 input_bfd, 1359 relocation, 1360 loc); 1361 } 1362 break; 1363 case IMAGE_REL_PPC_IFGLUE: 1364 { 1365 /* To solve this, we need to know whether or not the symbol */ 1366 /* appearing on the call instruction is a glue function or not. */ 1367 /* A glue function must announce itself via a IMGLUE reloc, and */ 1368 /* the reloc contains the required toc restore instruction */ 1369 1370 bfd_vma x; 1371 const char *my_name; 1372 DUMP_RELOC2(howto->name, rel); 1373 1374 if (h != 0) 1375 { 1376 my_name = h->root.root.root.string; 1377 if (h->symbol_is_glue == 1) 1378 { 1379 x = bfd_get_32 (input_bfd, loc); 1380 bfd_put_32 (input_bfd, h->glue_insn, loc); 1381 } 1382 } 1383 } 1384 break; 1385 case IMAGE_REL_PPC_SECREL: 1386 /* Unimplemented: codeview debugging information */ 1387 /* For fast access to the header of the section 1388 containing the item. */ 1389 break; 1390 case IMAGE_REL_PPC_SECTION: 1391 /* Unimplemented: codeview debugging information */ 1392 /* Is used to indicate that the value should be relative 1393 to the beginning of the section that contains the 1394 symbol */ 1395 break; 1396 case IMAGE_REL_PPC_ABSOLUTE: 1397 { 1398 const char *my_name; 1399 if (h == 0) 1400 my_name = (syms+symndx)->_n._n_name; 1401 else 1402 { 1403 my_name = h->root.root.root.string; 1404 } 1405 1406 fprintf (stderr, 1407 _("Warning: unsupported reloc %s <file %s, section %s>\n"), 1408 howto->name, 1409 bfd_get_filename(input_bfd), 1410 input_section->name); 1411 1412 fprintf (stderr,"sym %ld (%s), r_vaddr %ld (%lx)\n", 1413 rel->r_symndx, my_name, (long) rel->r_vaddr, 1414 (unsigned long) rel->r_vaddr); 1415 } 1416 break; 1417 case IMAGE_REL_PPC_IMGLUE: 1418 { 1419 /* There is nothing to do now. This reloc was noted in the first 1420 pass over the relocs, and the glue instruction extracted */ 1421 const char *my_name; 1422 if (h->symbol_is_glue == 1) 1423 break; 1424 my_name = h->root.root.root.string; 1425 1426 (*_bfd_error_handler) 1427 (_("%s: Out of order IMGLUE reloc for %s"), 1428 bfd_get_filename (input_bfd), my_name); 1429 bfd_set_error (bfd_error_bad_value); 1430 return false; 1431 } 1432 1433 case IMAGE_REL_PPC_ADDR32NB: 1434 { 1435 struct coff_link_hash_entry *myh = 0; 1436 const char *name = 0; 1437 DUMP_RELOC2(howto->name, rel); 1438 1439 if (strncmp(".idata$2",input_section->name,8) == 0 && first_thunk_address == 0) 1440 { 1441 /* set magic values */ 1442 int idata5offset; 1443 struct coff_link_hash_entry *myh = 0; 1444 myh = coff_link_hash_lookup (coff_hash_table (info), 1445 "__idata5_magic__", 1446 false, false, true); 1447 first_thunk_address = myh->root.u.def.value + 1448 sec->output_section->vma + 1449 sec->output_offset - 1450 pe_data(output_bfd)->pe_opthdr.ImageBase; 1451 1452 idata5offset = myh->root.u.def.value; 1453 myh = coff_link_hash_lookup (coff_hash_table (info), 1454 "__idata6_magic__", 1455 false, false, true); 1456 1457 thunk_size = myh->root.u.def.value - idata5offset; 1458 myh = coff_link_hash_lookup (coff_hash_table (info), 1459 "__idata4_magic__", 1460 false, false, true); 1461 import_table_size = myh->root.u.def.value; 1462 } 1463 1464 if (h == 0) 1465 { /* it is a file local symbol */ 1466 sym = syms + symndx; 1467 name = sym->_n._n_name; 1468 } 1469 else 1470 { 1471 char *target = 0; 1472 1473 name = h->root.root.root.string; 1474 if (strcmp(".idata$2", name) == 0) 1475 target = "__idata2_magic__"; 1476 else if (strcmp(".idata$4", name) == 0) 1477 target = "__idata4_magic__"; 1478 else if (strcmp(".idata$5", name) == 0) 1479 target = "__idata5_magic__"; 1480 1481 if (target != 0) 1482 { 1483 myh = 0; 1484 1485 myh = coff_link_hash_lookup (coff_hash_table (info), 1486 target, 1487 false, false, true); 1488 if (myh == 0) 1489 { 1490 /* Missing magic cookies. Something is very wrong. */ 1491 abort (); 1492 } 1493 1494 val = myh->root.u.def.value + 1495 sec->output_section->vma + sec->output_offset; 1496 if (first_thunk_address == 0) 1497 { 1498 int idata5offset; 1499 myh = coff_link_hash_lookup (coff_hash_table (info), 1500 "__idata5_magic__", 1501 false, false, true); 1502 first_thunk_address = myh->root.u.def.value + 1503 sec->output_section->vma + 1504 sec->output_offset - 1505 pe_data(output_bfd)->pe_opthdr.ImageBase; 1506 1507 idata5offset = myh->root.u.def.value; 1508 myh = coff_link_hash_lookup (coff_hash_table (info), 1509 "__idata6_magic__", 1510 false, false, true); 1511 1512 thunk_size = myh->root.u.def.value - idata5offset; 1513 myh = coff_link_hash_lookup (coff_hash_table (info), 1514 "__idata4_magic__", 1515 false, false, true); 1516 import_table_size = myh->root.u.def.value; 1517 } 1518 } 1519 } 1520 1521 rstat = _bfd_relocate_contents (howto, 1522 input_bfd, 1523 val - 1524 pe_data(output_bfd)->pe_opthdr.ImageBase, 1525 loc); 1526 } 1527 break; 1528 1529 case IMAGE_REL_PPC_REL24: 1530 DUMP_RELOC2(howto->name, rel); 1531 val -= (input_section->output_section->vma 1532 + input_section->output_offset); 1533 1534 rstat = _bfd_relocate_contents (howto, 1535 input_bfd, 1536 val, 1537 loc); 1538 break; 1539 case IMAGE_REL_PPC_ADDR16: 1540 case IMAGE_REL_PPC_ADDR24: 1541 case IMAGE_REL_PPC_ADDR32: 1542 DUMP_RELOC2(howto->name, rel); 1543 rstat = _bfd_relocate_contents (howto, 1544 input_bfd, 1545 val, 1546 loc); 1547 break; 1548 } 1549 1550 if ( info->base_file ) 1551 { 1552 /* So if this is non pcrelative, and is referenced 1553 to a section or a common symbol, then it needs a reloc */ 1554 if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)) 1555 { 1556 /* relocation to a symbol in a section which 1557 isn't absolute - we output the address here 1558 to a file */ 1559 bfd_vma addr = rel->r_vaddr 1560 - input_section->vma 1561 + input_section->output_offset 1562 + input_section->output_section->vma; 1563 1564 if (coff_data(output_bfd)->pe) 1565 { 1566 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; 1567 } 1568 fwrite (&addr, 1,4, (FILE *) info->base_file); 1569 } 1570 } 1571 1572 switch (rstat) 1573 { 1574 default: 1575 abort (); 1576 case bfd_reloc_ok: 1577 break; 1578 case bfd_reloc_overflow: 1579 { 1580 const char *name; 1581 char buf[SYMNMLEN + 1]; 1582 1583 if (symndx == -1) 1584 name = "*ABS*"; 1585 else if (h != NULL) 1586 name = h->root.root.root.string; 1587 else if (sym == NULL) 1588 name = "*unknown*"; 1589 else if (sym->_n._n_n._n_zeroes == 0 1590 && sym->_n._n_n._n_offset != 0) 1591 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; 1592 else 1593 { 1594 strncpy (buf, sym->_n._n_name, SYMNMLEN); 1595 buf[SYMNMLEN] = '\0'; 1596 name = buf; 1597 } 1598 1599 if (! ((*info->callbacks->reloc_overflow) 1600 (info, name, howto->name, 1601 (bfd_vma) 0, input_bfd, 1602 input_section, rel->r_vaddr - input_section->vma))) 1603 { 1604 return false; 1605 } 1606 } 1607 } 1608 1609 } 1610 1611 return true; 1612 } 1613 1614 #ifdef COFF_IMAGE_WITH_PE 1615 1616 /* FIXME: BFD should not use global variables. This file is compiled 1617 twice, and these variables are shared. This is confusing and 1618 weird. */ 1619 1620 long int global_toc_size = 4; 1621 1622 bfd* bfd_of_toc_owner = 0; 1623 1624 long int import_table_size; 1625 long int first_thunk_address; 1626 long int thunk_size; 1627 1628 struct list_ele *head; 1629 struct list_ele *tail; 1630 1631 static char * 1632 h1 = N_("\n\t\t\tTOC MAPPING\n\n"); 1633 static char * 1634 h2 = N_(" TOC disassembly Comments Name\n"); 1635 static char * 1636 h3 = N_(" Offset spelling (if present)\n"); 1637 1638 void 1639 dump_toc (vfile) 1640 PTR vfile; 1641 { 1642 FILE *file = (FILE *) vfile; 1643 struct list_ele *t; 1644 1645 fprintf (file, _(h1)); 1646 fprintf (file, _(h2)); 1647 fprintf (file, _(h3)); 1648 1649 for (t = head; t != 0; t=t->next) 1650 { 1651 const char *cat = ""; 1652 1653 if (t->cat == priv) 1654 cat = _("private "); 1655 else if (t->cat == pub) 1656 cat = _("public "); 1657 else if (t->cat == data) 1658 cat = _("data-in-toc "); 1659 1660 if (t->offset > global_toc_size) 1661 { 1662 if (t->offset <= global_toc_size + thunk_size) 1663 cat = _("IAT reference "); 1664 else 1665 { 1666 fprintf (file, 1667 _("**** global_toc_size %ld(%lx), thunk_size %ld(%lx)\n"), 1668 global_toc_size, global_toc_size, thunk_size, thunk_size); 1669 cat = _("Out of bounds!"); 1670 } 1671 } 1672 1673 fprintf (file, 1674 " %04lx (%d)", (unsigned long) t->offset, t->offset - 32768); 1675 fprintf (file, 1676 " %s %s\n", 1677 cat, t->name); 1678 1679 } 1680 1681 fprintf (file, "\n"); 1682 } 1683 1684 boolean 1685 ppc_allocate_toc_section (info) 1686 struct bfd_link_info *info ATTRIBUTE_UNUSED; 1687 { 1688 asection *s; 1689 bfd_byte *foo; 1690 static char test_char = '1'; 1691 1692 if ( global_toc_size == 0 ) /* FIXME: does this get me in trouble? */ 1693 return true; 1694 1695 if (bfd_of_toc_owner == 0) 1696 { 1697 /* No toc owner? Something is very wrong. */ 1698 abort (); 1699 } 1700 1701 s = bfd_get_section_by_name ( bfd_of_toc_owner , TOC_SECTION_NAME); 1702 if (s == NULL) 1703 { 1704 /* No toc section? Something is very wrong. */ 1705 abort (); 1706 } 1707 1708 foo = (bfd_byte *) bfd_alloc(bfd_of_toc_owner, global_toc_size); 1709 memset(foo, test_char, global_toc_size); 1710 1711 s->_raw_size = s->_cooked_size = global_toc_size; 1712 s->contents = foo; 1713 1714 return true; 1715 } 1716 1717 boolean 1718 ppc_process_before_allocation (abfd, info) 1719 bfd *abfd; 1720 struct bfd_link_info *info; 1721 { 1722 asection *sec; 1723 struct internal_reloc *i, *rel; 1724 1725 /* here we have a bfd that is to be included on the link. We have a hook 1726 to do reloc rummaging, before section sizes are nailed down. */ 1727 1728 _bfd_coff_get_external_symbols(abfd); 1729 1730 /* rummage around all the relocs and map the toc */ 1731 sec = abfd->sections; 1732 1733 if (sec == 0) 1734 { 1735 return true; 1736 } 1737 1738 for (; sec != 0; sec = sec->next) 1739 { 1740 if (sec->reloc_count == 0) 1741 continue; 1742 1743 /* load the relocs */ 1744 /* FIXME: there may be a storage leak here */ 1745 i=_bfd_coff_read_internal_relocs(abfd,sec,1,0,0,0); 1746 1747 if (i == 0) 1748 abort (); 1749 1750 for (rel=i;rel<i+sec->reloc_count;++rel) 1751 { 1752 unsigned short r_type = EXTRACT_TYPE (rel->r_type); 1753 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type); 1754 boolean ok = true; 1755 1756 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); 1757 1758 switch(r_type) 1759 { 1760 case IMAGE_REL_PPC_TOCREL16: 1761 /* if TOCDEFN is on, ignore as someone else has allocated the 1762 toc entry */ 1763 if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN ) 1764 ok = ppc_record_toc_entry(abfd, info, sec, 1765 rel->r_symndx, default_toc); 1766 if (!ok) 1767 return false; 1768 break; 1769 case IMAGE_REL_PPC_IMGLUE: 1770 ppc_mark_symbol_as_glue(abfd, rel->r_symndx, rel); 1771 break; 1772 default: 1773 break; 1774 } 1775 } 1776 } 1777 1778 return true; 1779 } 1780 1781 #endif 1782 1783 static bfd_reloc_status_type 1784 ppc_refhi_reloc (abfd, 1785 reloc_entry, 1786 symbol, 1787 data, 1788 input_section, 1789 output_bfd, 1790 error_message) 1791 bfd *abfd ATTRIBUTE_UNUSED; 1792 arelent *reloc_entry ATTRIBUTE_UNUSED; 1793 asymbol *symbol ATTRIBUTE_UNUSED; 1794 PTR data ATTRIBUTE_UNUSED; 1795 asection *input_section ATTRIBUTE_UNUSED; 1796 bfd *output_bfd; 1797 char **error_message ATTRIBUTE_UNUSED; 1798 { 1799 UN_IMPL("REFHI"); 1800 DUMP_RELOC("REFHI",reloc_entry); 1801 1802 if (output_bfd == (bfd *) NULL) 1803 return bfd_reloc_continue; 1804 1805 return bfd_reloc_undefined; 1806 } 1807 1808 #if 0 1809 1810 static bfd_reloc_status_type 1811 ppc_reflo_reloc (abfd, 1812 reloc_entry, 1813 symbol, 1814 data, 1815 input_section, 1816 output_bfd, 1817 error_message) 1818 bfd *abfd; 1819 arelent *reloc_entry; 1820 asymbol *symbol; 1821 PTR data; 1822 asection *input_section; 1823 bfd *output_bfd; 1824 char **error_message; 1825 { 1826 UN_IMPL("REFLO"); 1827 DUMP_RELOC("REFLO",reloc_entry); 1828 1829 if (output_bfd == (bfd *) NULL) 1830 return bfd_reloc_continue; 1831 1832 return bfd_reloc_undefined; 1833 } 1834 1835 #endif 1836 1837 static bfd_reloc_status_type 1838 ppc_pair_reloc (abfd, 1839 reloc_entry, 1840 symbol, 1841 data, 1842 input_section, 1843 output_bfd, 1844 error_message) 1845 bfd *abfd ATTRIBUTE_UNUSED; 1846 arelent *reloc_entry ATTRIBUTE_UNUSED; 1847 asymbol *symbol ATTRIBUTE_UNUSED; 1848 PTR data ATTRIBUTE_UNUSED; 1849 asection *input_section ATTRIBUTE_UNUSED; 1850 bfd *output_bfd; 1851 char **error_message ATTRIBUTE_UNUSED; 1852 { 1853 UN_IMPL("PAIR"); 1854 DUMP_RELOC("PAIR",reloc_entry); 1855 1856 if (output_bfd == (bfd *) NULL) 1857 return bfd_reloc_continue; 1858 1859 return bfd_reloc_undefined; 1860 } 1861 1862 static bfd_reloc_status_type 1863 ppc_toc16_reloc (abfd, 1864 reloc_entry, 1865 symbol, 1866 data, 1867 input_section, 1868 output_bfd, 1869 error_message) 1870 bfd *abfd ATTRIBUTE_UNUSED; 1871 arelent *reloc_entry ATTRIBUTE_UNUSED; 1872 asymbol *symbol ATTRIBUTE_UNUSED; 1873 PTR data ATTRIBUTE_UNUSED; 1874 asection *input_section ATTRIBUTE_UNUSED; 1875 bfd *output_bfd; 1876 char **error_message ATTRIBUTE_UNUSED; 1877 { 1878 UN_IMPL("TOCREL16"); 1879 DUMP_RELOC("TOCREL16",reloc_entry); 1880 1881 if (output_bfd == (bfd *) NULL) 1882 { 1883 return bfd_reloc_continue; 1884 } 1885 1886 return bfd_reloc_ok; 1887 } 1888 1889 #if 0 1890 1891 /* ADDR32NB : 32 bit address relative to the virtual origin. */ 1892 /* (On the alpha, this is always a linker generated thunk)*/ 1893 /* (i.e. 32bit addr relative to the image base) */ 1894 /* */ 1895 /* */ 1896 1897 static bfd_reloc_status_type 1898 ppc_addr32nb_reloc (abfd, 1899 reloc_entry, 1900 symbol, 1901 data, 1902 input_section, 1903 output_bfd, 1904 error_message) 1905 bfd *abfd; 1906 arelent *reloc_entry; 1907 asymbol *symbol; 1908 PTR data; 1909 asection *input_section; 1910 bfd *output_bfd; 1911 char **error_message; 1912 { 1913 UN_IMPL("ADDR32NB"); 1914 DUMP_RELOC("ADDR32NB",reloc_entry); 1915 1916 return bfd_reloc_ok; 1917 } 1918 1919 #endif 1920 1921 static bfd_reloc_status_type 1922 ppc_secrel_reloc (abfd, 1923 reloc_entry, 1924 symbol, 1925 data, 1926 input_section, 1927 output_bfd, 1928 error_message) 1929 bfd *abfd ATTRIBUTE_UNUSED; 1930 arelent *reloc_entry ATTRIBUTE_UNUSED; 1931 asymbol *symbol ATTRIBUTE_UNUSED; 1932 PTR data ATTRIBUTE_UNUSED; 1933 asection *input_section ATTRIBUTE_UNUSED; 1934 bfd *output_bfd; 1935 char **error_message ATTRIBUTE_UNUSED; 1936 { 1937 UN_IMPL("SECREL"); 1938 DUMP_RELOC("SECREL",reloc_entry); 1939 1940 if (output_bfd == (bfd *) NULL) 1941 return bfd_reloc_continue; 1942 1943 return bfd_reloc_ok; 1944 } 1945 1946 static bfd_reloc_status_type 1947 ppc_section_reloc (abfd, 1948 reloc_entry, 1949 symbol, 1950 data, 1951 input_section, 1952 output_bfd, 1953 error_message) 1954 bfd *abfd ATTRIBUTE_UNUSED; 1955 arelent *reloc_entry ATTRIBUTE_UNUSED; 1956 asymbol *symbol ATTRIBUTE_UNUSED; 1957 PTR data ATTRIBUTE_UNUSED; 1958 asection *input_section ATTRIBUTE_UNUSED; 1959 bfd *output_bfd; 1960 char **error_message ATTRIBUTE_UNUSED; 1961 { 1962 UN_IMPL("SECTION"); 1963 DUMP_RELOC("SECTION",reloc_entry); 1964 1965 if (output_bfd == (bfd *) NULL) 1966 return bfd_reloc_continue; 1967 1968 return bfd_reloc_ok; 1969 } 1970 1971 static bfd_reloc_status_type 1972 ppc_imglue_reloc (abfd, 1973 reloc_entry, 1974 symbol, 1975 data, 1976 input_section, 1977 output_bfd, 1978 error_message) 1979 bfd *abfd ATTRIBUTE_UNUSED; 1980 arelent *reloc_entry ATTRIBUTE_UNUSED; 1981 asymbol *symbol ATTRIBUTE_UNUSED; 1982 PTR data ATTRIBUTE_UNUSED; 1983 asection *input_section ATTRIBUTE_UNUSED; 1984 bfd *output_bfd; 1985 char **error_message ATTRIBUTE_UNUSED; 1986 { 1987 UN_IMPL("IMGLUE"); 1988 DUMP_RELOC("IMGLUE",reloc_entry); 1989 1990 if (output_bfd == (bfd *) NULL) 1991 return bfd_reloc_continue; 1992 1993 return bfd_reloc_ok; 1994 } 1995 1996 #define MAX_RELOC_INDEX \ 1997 (sizeof (ppc_coff_howto_table) / sizeof (ppc_coff_howto_table[0]) - 1) 1998 1999 /* FIXME: There is a possiblity that when we read in a reloc from a file, 2000 that there are some bits encoded in the upper portion of the 2001 type field. Not yet implemented. 2002 */ 2003 static void ppc_coff_rtype2howto PARAMS ((arelent *relent, 2004 struct internal_reloc *internal)); 2005 2006 static void 2007 ppc_coff_rtype2howto (relent, internal) 2008 arelent *relent; 2009 struct internal_reloc *internal; 2010 { 2011 2012 /* We can encode one of three things in the type field, aside from the 2013 type: 2014 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction 2015 value, rather than an addition value 2016 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that 2017 the branch is expected to be taken or not. 2018 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file 2019 For now, we just strip this stuff to find the type, and ignore it other 2020 than that. 2021 */ 2022 reloc_howto_type *howto; 2023 unsigned short r_type = EXTRACT_TYPE (internal->r_type); 2024 unsigned short r_flags = EXTRACT_FLAGS(internal->r_type); 2025 unsigned short junk = EXTRACT_JUNK (internal->r_type); 2026 2027 /* the masking process only slices off the bottom byte for r_type. */ 2028 if ( r_type > MAX_RELOC_INDEX ) 2029 abort (); 2030 2031 /* check for absolute crap */ 2032 if ( junk != 0 ) 2033 abort (); 2034 2035 switch(r_type) 2036 { 2037 case IMAGE_REL_PPC_ADDR16: 2038 case IMAGE_REL_PPC_REL24: 2039 case IMAGE_REL_PPC_ADDR24: 2040 case IMAGE_REL_PPC_ADDR32: 2041 case IMAGE_REL_PPC_IFGLUE: 2042 case IMAGE_REL_PPC_ADDR32NB: 2043 case IMAGE_REL_PPC_SECTION: 2044 case IMAGE_REL_PPC_SECREL: 2045 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal); 2046 howto = ppc_coff_howto_table + r_type; 2047 break; 2048 case IMAGE_REL_PPC_IMGLUE: 2049 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal); 2050 howto = ppc_coff_howto_table + r_type; 2051 break; 2052 case IMAGE_REL_PPC_TOCREL16: 2053 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal); 2054 if (r_flags & IMAGE_REL_PPC_TOCDEFN) 2055 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN; 2056 else 2057 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16; 2058 break; 2059 default: 2060 fprintf (stderr, 2061 _("Warning: Unsupported reloc %s [%d] used -- it may not work.\n"), 2062 ppc_coff_howto_table[r_type].name, 2063 r_type); 2064 howto = ppc_coff_howto_table + r_type; 2065 break; 2066 } 2067 2068 relent->howto = howto; 2069 2070 } 2071 2072 static reloc_howto_type * 2073 coff_ppc_rtype_to_howto (abfd, sec, rel, h, sym, addendp) 2074 bfd *abfd ATTRIBUTE_UNUSED; 2075 asection *sec; 2076 struct internal_reloc *rel; 2077 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; 2078 struct internal_syment *sym ATTRIBUTE_UNUSED; 2079 bfd_vma *addendp; 2080 { 2081 reloc_howto_type *howto; 2082 2083 /* We can encode one of three things in the type field, aside from the 2084 type: 2085 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction 2086 value, rather than an addition value 2087 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that 2088 the branch is expected to be taken or not. 2089 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file 2090 For now, we just strip this stuff to find the type, and ignore it other 2091 than that. 2092 */ 2093 2094 unsigned short r_type = EXTRACT_TYPE (rel->r_type); 2095 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type); 2096 unsigned short junk = EXTRACT_JUNK (rel->r_type); 2097 2098 /* the masking process only slices off the bottom byte for r_type. */ 2099 if ( r_type > MAX_RELOC_INDEX ) 2100 abort (); 2101 2102 /* check for absolute crap */ 2103 if ( junk != 0 ) 2104 abort (); 2105 2106 switch(r_type) 2107 { 2108 case IMAGE_REL_PPC_ADDR32NB: 2109 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); 2110 *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; 2111 howto = ppc_coff_howto_table + r_type; 2112 break; 2113 case IMAGE_REL_PPC_TOCREL16: 2114 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); 2115 if (r_flags & IMAGE_REL_PPC_TOCDEFN) 2116 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN; 2117 else 2118 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16; 2119 break; 2120 case IMAGE_REL_PPC_ADDR16: 2121 case IMAGE_REL_PPC_REL24: 2122 case IMAGE_REL_PPC_ADDR24: 2123 case IMAGE_REL_PPC_ADDR32: 2124 case IMAGE_REL_PPC_IFGLUE: 2125 case IMAGE_REL_PPC_SECTION: 2126 case IMAGE_REL_PPC_SECREL: 2127 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); 2128 howto = ppc_coff_howto_table + r_type; 2129 break; 2130 case IMAGE_REL_PPC_IMGLUE: 2131 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); 2132 howto = ppc_coff_howto_table + r_type; 2133 break; 2134 default: 2135 fprintf (stderr, 2136 _("Warning: Unsupported reloc %s [%d] used -- it may not work.\n"), 2137 ppc_coff_howto_table[r_type].name, 2138 r_type); 2139 howto = ppc_coff_howto_table + r_type; 2140 break; 2141 } 2142 2143 return howto; 2144 } 2145 2146 /* a cheesy little macro to make the code a little more readable */ 2147 #define HOW2MAP(bfd_rtype,ppc_rtype) \ 2148 case bfd_rtype: return &ppc_coff_howto_table[ppc_rtype] 2149 2150 static reloc_howto_type *ppc_coff_reloc_type_lookup 2151 PARAMS ((bfd *, bfd_reloc_code_real_type)); 2152 2153 static reloc_howto_type * 2154 ppc_coff_reloc_type_lookup (abfd, code) 2155 bfd *abfd ATTRIBUTE_UNUSED; 2156 bfd_reloc_code_real_type code; 2157 { 2158 switch (code) 2159 { 2160 HOW2MAP(BFD_RELOC_32_GOTOFF, IMAGE_REL_PPC_IMGLUE); 2161 HOW2MAP(BFD_RELOC_16_GOT_PCREL, IMAGE_REL_PPC_IFGLUE); 2162 HOW2MAP(BFD_RELOC_16, IMAGE_REL_PPC_ADDR16); 2163 HOW2MAP(BFD_RELOC_PPC_B26, IMAGE_REL_PPC_REL24); 2164 HOW2MAP(BFD_RELOC_PPC_BA26, IMAGE_REL_PPC_ADDR24); 2165 HOW2MAP(BFD_RELOC_PPC_TOC16, IMAGE_REL_PPC_TOCREL16); 2166 HOW2MAP(BFD_RELOC_16_GOTOFF, IMAGE_REL_PPC_TOCREL16_DEFN); 2167 HOW2MAP(BFD_RELOC_32, IMAGE_REL_PPC_ADDR32); 2168 HOW2MAP(BFD_RELOC_RVA, IMAGE_REL_PPC_ADDR32NB); 2169 default: 2170 return NULL; 2171 } 2172 /*NOTREACHED*/ 2173 } 2174 2175 #undef HOW2MAP 2176 2177 /* Tailor coffcode.h -- macro heaven. */ 2178 2179 #define RTYPE2HOWTO(cache_ptr, dst) ppc_coff_rtype2howto (cache_ptr, dst) 2180 2181 #ifndef COFF_IMAGE_WITH_PE 2182 static void ppc_coff_swap_sym_in_hook PARAMS ((bfd *, PTR, PTR)); 2183 #endif 2184 2185 /* We use the special COFF backend linker, with our own special touch. */ 2186 2187 #define coff_bfd_reloc_type_lookup ppc_coff_reloc_type_lookup 2188 #define coff_rtype_to_howto coff_ppc_rtype_to_howto 2189 #define coff_relocate_section coff_ppc_relocate_section 2190 #define coff_bfd_final_link ppc_bfd_coff_final_link 2191 2192 #ifndef COFF_IMAGE_WITH_PE 2193 /* FIXME: This no longer works. */ 2194 #define coff_swap_sym_in_hook ppc_coff_swap_sym_in_hook 2195 #endif 2196 2197 #define SELECT_RELOC(internal, howto) {internal.r_type=howto->type;} 2198 2199 #define COFF_PAGE_SIZE 0x1000 2200 2201 /* FIXME: This controls some code that used to be in peicode.h and is 2202 now in peigen.c. It will not control the code in peigen.c. If 2203 anybody wants to get this working, you will need to fix that. */ 2204 #define POWERPC_LE_PE 2205 2206 #define COFF_SECTION_ALIGNMENT_ENTRIES \ 2207 { COFF_SECTION_NAME_EXACT_MATCH (".idata$2"), \ 2208 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \ 2209 { COFF_SECTION_NAME_EXACT_MATCH (".idata$3"), \ 2210 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \ 2211 { COFF_SECTION_NAME_EXACT_MATCH (".idata$4"), \ 2212 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \ 2213 { COFF_SECTION_NAME_EXACT_MATCH (".idata$5"), \ 2214 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \ 2215 { COFF_SECTION_NAME_EXACT_MATCH (".idata$6"), \ 2216 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 1 }, \ 2217 { COFF_SECTION_NAME_EXACT_MATCH (".reloc"), \ 2218 COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 1 } 2219 2220 #include "coffcode.h" 2221 2222 #ifndef COFF_IMAGE_WITH_PE 2223 /* FIXME: 2224 What we're trying to do here is allocate a toc section (early), and attach 2225 it to the last bfd to be processed. This avoids the problem of having a toc 2226 written out before all files have been processed. This code allocates 2227 a toc section for every file, and records the last one seen. There are 2228 at least two problems with this approach: 2229 1. We allocate whole bunches of toc sections that are ignored, but at 2230 at least we will not allocate a toc if no .toc is present. 2231 2. It's not clear to me that being the last bfd read necessarily means 2232 that you are the last bfd closed. 2233 3. Doing it on a "swap in" hook depends on when the "swap in" is called, 2234 and how often, etc. It's not clear to me that there isn't a hole here. 2235 */ 2236 2237 static void 2238 ppc_coff_swap_sym_in_hook (abfd, ext1, in1) 2239 bfd *abfd; 2240 PTR ext1 ATTRIBUTE_UNUSED; 2241 PTR in1; 2242 { 2243 struct internal_syment *in = (struct internal_syment *)in1; 2244 2245 if (bfd_of_toc_owner != 0) /* we already have a toc, so go home */ 2246 return; 2247 2248 if (strcmp(in->_n._n_name, ".toc") == 0) 2249 { 2250 flagword flags; 2251 register asection *s; 2252 2253 s = bfd_get_section_by_name ( abfd , TOC_SECTION_NAME); 2254 if (s != NULL) 2255 { 2256 return; 2257 } 2258 2259 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; 2260 2261 s = bfd_make_section (abfd, TOC_SECTION_NAME); 2262 2263 if (s == NULL 2264 || !bfd_set_section_flags (abfd, s, flags) 2265 || !bfd_set_section_alignment (abfd, s, 2)) 2266 { 2267 /* FIXME: set appropriate bfd error */ 2268 abort (); 2269 } 2270 2271 /* save the bfd for later allocation */ 2272 bfd_of_toc_owner = abfd; 2273 } 2274 2275 return; 2276 } 2277 #endif 2278 2279 #ifndef COFF_IMAGE_WITH_PE 2280 2281 static boolean ppc_do_last PARAMS ((bfd *)); 2282 static bfd *ppc_get_last PARAMS ((void)); 2283 2284 static boolean 2285 ppc_do_last (abfd) 2286 bfd *abfd; 2287 { 2288 if (abfd == bfd_of_toc_owner) 2289 return true; 2290 else 2291 return false; 2292 } 2293 2294 static bfd * 2295 ppc_get_last() 2296 { 2297 return bfd_of_toc_owner; 2298 } 2299 2300 /* this piece of machinery exists only to guarantee that the bfd that holds 2301 the toc section is written last. 2302 2303 This does depend on bfd_make_section attaching a new section to the 2304 end of the section list for the bfd. 2305 2306 This is otherwise intended to be functionally the same as 2307 cofflink.c:_bfd_coff_final_link(). It is specifically different only 2308 where the POWERPC_LE_PE macro modifies the code. It is left in as a 2309 precise form of comment. krk@cygnus.com 2310 */ 2311 2312 /* Do the final link step. */ 2313 2314 boolean 2315 ppc_bfd_coff_final_link (abfd, info) 2316 bfd *abfd; 2317 struct bfd_link_info *info; 2318 { 2319 bfd_size_type symesz; 2320 struct coff_final_link_info finfo; 2321 boolean debug_merge_allocated; 2322 asection *o; 2323 struct bfd_link_order *p; 2324 size_t max_sym_count; 2325 size_t max_lineno_count; 2326 size_t max_reloc_count; 2327 size_t max_output_reloc_count; 2328 size_t max_contents_size; 2329 file_ptr rel_filepos; 2330 unsigned int relsz; 2331 file_ptr line_filepos; 2332 unsigned int linesz; 2333 bfd *sub; 2334 bfd_byte *external_relocs = NULL; 2335 char strbuf[STRING_SIZE_SIZE]; 2336 2337 symesz = bfd_coff_symesz (abfd); 2338 2339 finfo.info = info; 2340 finfo.output_bfd = abfd; 2341 finfo.strtab = NULL; 2342 finfo.section_info = NULL; 2343 finfo.last_file_index = -1; 2344 finfo.last_bf_index = -1; 2345 finfo.internal_syms = NULL; 2346 finfo.sec_ptrs = NULL; 2347 finfo.sym_indices = NULL; 2348 finfo.outsyms = NULL; 2349 finfo.linenos = NULL; 2350 finfo.contents = NULL; 2351 finfo.external_relocs = NULL; 2352 finfo.internal_relocs = NULL; 2353 debug_merge_allocated = false; 2354 2355 coff_data (abfd)->link_info = info; 2356 2357 finfo.strtab = _bfd_stringtab_init (); 2358 if (finfo.strtab == NULL) 2359 goto error_return; 2360 2361 if (! coff_debug_merge_hash_table_init (&finfo.debug_merge)) 2362 goto error_return; 2363 debug_merge_allocated = true; 2364 2365 /* Compute the file positions for all the sections. */ 2366 if (! abfd->output_has_begun) 2367 { 2368 if (! bfd_coff_compute_section_file_positions (abfd)) 2369 return false; 2370 } 2371 2372 /* Count the line numbers and relocation entries required for the 2373 output file. Set the file positions for the relocs. */ 2374 rel_filepos = obj_relocbase (abfd); 2375 relsz = bfd_coff_relsz (abfd); 2376 max_contents_size = 0; 2377 max_lineno_count = 0; 2378 max_reloc_count = 0; 2379 2380 for (o = abfd->sections; o != NULL; o = o->next) 2381 { 2382 o->reloc_count = 0; 2383 o->lineno_count = 0; 2384 for (p = o->link_order_head; p != NULL; p = p->next) 2385 { 2386 2387 if (p->type == bfd_indirect_link_order) 2388 { 2389 asection *sec; 2390 2391 sec = p->u.indirect.section; 2392 2393 /* Mark all sections which are to be included in the 2394 link. This will normally be every section. We need 2395 to do this so that we can identify any sections which 2396 the linker has decided to not include. */ 2397 sec->linker_mark = true; 2398 2399 if (info->strip == strip_none 2400 || info->strip == strip_some) 2401 o->lineno_count += sec->lineno_count; 2402 2403 if (info->relocateable) 2404 o->reloc_count += sec->reloc_count; 2405 2406 if (sec->_raw_size > max_contents_size) 2407 max_contents_size = sec->_raw_size; 2408 if (sec->lineno_count > max_lineno_count) 2409 max_lineno_count = sec->lineno_count; 2410 if (sec->reloc_count > max_reloc_count) 2411 max_reloc_count = sec->reloc_count; 2412 } 2413 else if (info->relocateable 2414 && (p->type == bfd_section_reloc_link_order 2415 || p->type == bfd_symbol_reloc_link_order)) 2416 ++o->reloc_count; 2417 } 2418 if (o->reloc_count == 0) 2419 o->rel_filepos = 0; 2420 else 2421 { 2422 o->flags |= SEC_RELOC; 2423 o->rel_filepos = rel_filepos; 2424 rel_filepos += o->reloc_count * relsz; 2425 } 2426 } 2427 2428 /* If doing a relocateable link, allocate space for the pointers we 2429 need to keep. */ 2430 if (info->relocateable) 2431 { 2432 unsigned int i; 2433 2434 /* We use section_count + 1, rather than section_count, because 2435 the target_index fields are 1 based. */ 2436 finfo.section_info = 2437 ((struct coff_link_section_info *) 2438 bfd_malloc ((abfd->section_count + 1) 2439 * sizeof (struct coff_link_section_info))); 2440 if (finfo.section_info == NULL) 2441 goto error_return; 2442 for (i = 0; i <= abfd->section_count; i++) 2443 { 2444 finfo.section_info[i].relocs = NULL; 2445 finfo.section_info[i].rel_hashes = NULL; 2446 } 2447 } 2448 2449 /* We now know the size of the relocs, so we can determine the file 2450 positions of the line numbers. */ 2451 line_filepos = rel_filepos; 2452 linesz = bfd_coff_linesz (abfd); 2453 max_output_reloc_count = 0; 2454 for (o = abfd->sections; o != NULL; o = o->next) 2455 { 2456 if (o->lineno_count == 0) 2457 o->line_filepos = 0; 2458 else 2459 { 2460 o->line_filepos = line_filepos; 2461 line_filepos += o->lineno_count * linesz; 2462 } 2463 2464 if (o->reloc_count != 0) 2465 { 2466 /* We don't know the indices of global symbols until we have 2467 written out all the local symbols. For each section in 2468 the output file, we keep an array of pointers to hash 2469 table entries. Each entry in the array corresponds to a 2470 reloc. When we find a reloc against a global symbol, we 2471 set the corresponding entry in this array so that we can 2472 fix up the symbol index after we have written out all the 2473 local symbols. 2474 2475 Because of this problem, we also keep the relocs in 2476 memory until the end of the link. This wastes memory, 2477 but only when doing a relocateable link, which is not the 2478 common case. */ 2479 BFD_ASSERT (info->relocateable); 2480 finfo.section_info[o->target_index].relocs = 2481 ((struct internal_reloc *) 2482 bfd_malloc (o->reloc_count * sizeof (struct internal_reloc))); 2483 finfo.section_info[o->target_index].rel_hashes = 2484 ((struct coff_link_hash_entry **) 2485 bfd_malloc (o->reloc_count 2486 * sizeof (struct coff_link_hash_entry *))); 2487 if (finfo.section_info[o->target_index].relocs == NULL 2488 || finfo.section_info[o->target_index].rel_hashes == NULL) 2489 goto error_return; 2490 2491 if (o->reloc_count > max_output_reloc_count) 2492 max_output_reloc_count = o->reloc_count; 2493 } 2494 2495 /* Reset the reloc and lineno counts, so that we can use them to 2496 count the number of entries we have output so far. */ 2497 o->reloc_count = 0; 2498 o->lineno_count = 0; 2499 } 2500 2501 obj_sym_filepos (abfd) = line_filepos; 2502 2503 /* Figure out the largest number of symbols in an input BFD. Take 2504 the opportunity to clear the output_has_begun fields of all the 2505 input BFD's. */ 2506 max_sym_count = 0; 2507 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 2508 { 2509 size_t sz; 2510 2511 sub->output_has_begun = false; 2512 sz = obj_raw_syment_count (sub); 2513 if (sz > max_sym_count) 2514 max_sym_count = sz; 2515 } 2516 2517 /* Allocate some buffers used while linking. */ 2518 finfo.internal_syms = ((struct internal_syment *) 2519 bfd_malloc (max_sym_count 2520 * sizeof (struct internal_syment))); 2521 finfo.sec_ptrs = (asection **) bfd_malloc (max_sym_count 2522 * sizeof (asection *)); 2523 finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); 2524 finfo.outsyms = ((bfd_byte *) 2525 bfd_malloc ((size_t) ((max_sym_count + 1) * symesz))); 2526 finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count 2527 * bfd_coff_linesz (abfd)); 2528 finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); 2529 finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz); 2530 if (! info->relocateable) 2531 finfo.internal_relocs = ((struct internal_reloc *) 2532 bfd_malloc (max_reloc_count 2533 * sizeof (struct internal_reloc))); 2534 if ((finfo.internal_syms == NULL && max_sym_count > 0) 2535 || (finfo.sec_ptrs == NULL && max_sym_count > 0) 2536 || (finfo.sym_indices == NULL && max_sym_count > 0) 2537 || finfo.outsyms == NULL 2538 || (finfo.linenos == NULL && max_lineno_count > 0) 2539 || (finfo.contents == NULL && max_contents_size > 0) 2540 || (finfo.external_relocs == NULL && max_reloc_count > 0) 2541 || (! info->relocateable 2542 && finfo.internal_relocs == NULL 2543 && max_reloc_count > 0)) 2544 goto error_return; 2545 2546 /* We now know the position of everything in the file, except that 2547 we don't know the size of the symbol table and therefore we don't 2548 know where the string table starts. We just build the string 2549 table in memory as we go along. We process all the relocations 2550 for a single input file at once. */ 2551 obj_raw_syment_count (abfd) = 0; 2552 2553 if (coff_backend_info (abfd)->_bfd_coff_start_final_link) 2554 { 2555 if (! bfd_coff_start_final_link (abfd, info)) 2556 goto error_return; 2557 } 2558 2559 for (o = abfd->sections; o != NULL; o = o->next) 2560 { 2561 for (p = o->link_order_head; p != NULL; p = p->next) 2562 { 2563 if (p->type == bfd_indirect_link_order 2564 && (bfd_get_flavour (p->u.indirect.section->owner) 2565 == bfd_target_coff_flavour)) 2566 { 2567 sub = p->u.indirect.section->owner; 2568 #ifdef POWERPC_LE_PE 2569 if (! sub->output_has_begun && !ppc_do_last(sub)) 2570 #else 2571 if (! sub->output_has_begun) 2572 #endif 2573 { 2574 if (! _bfd_coff_link_input_bfd (&finfo, sub)) 2575 goto error_return; 2576 sub->output_has_begun = true; 2577 } 2578 } 2579 else if (p->type == bfd_section_reloc_link_order 2580 || p->type == bfd_symbol_reloc_link_order) 2581 { 2582 if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p)) 2583 goto error_return; 2584 } 2585 else 2586 { 2587 if (! _bfd_default_link_order (abfd, info, o, p)) 2588 goto error_return; 2589 } 2590 } 2591 } 2592 2593 #ifdef POWERPC_LE_PE 2594 { 2595 bfd* last_one = ppc_get_last(); 2596 if (last_one) 2597 { 2598 if (! _bfd_coff_link_input_bfd (&finfo, last_one)) 2599 goto error_return; 2600 } 2601 last_one->output_has_begun = true; 2602 } 2603 #endif 2604 2605 /* Free up the buffers used by _bfd_coff_link_input_bfd. */ 2606 2607 coff_debug_merge_hash_table_free (&finfo.debug_merge); 2608 debug_merge_allocated = false; 2609 2610 if (finfo.internal_syms != NULL) 2611 { 2612 free (finfo.internal_syms); 2613 finfo.internal_syms = NULL; 2614 } 2615 if (finfo.sec_ptrs != NULL) 2616 { 2617 free (finfo.sec_ptrs); 2618 finfo.sec_ptrs = NULL; 2619 } 2620 if (finfo.sym_indices != NULL) 2621 { 2622 free (finfo.sym_indices); 2623 finfo.sym_indices = NULL; 2624 } 2625 if (finfo.linenos != NULL) 2626 { 2627 free (finfo.linenos); 2628 finfo.linenos = NULL; 2629 } 2630 if (finfo.contents != NULL) 2631 { 2632 free (finfo.contents); 2633 finfo.contents = NULL; 2634 } 2635 if (finfo.external_relocs != NULL) 2636 { 2637 free (finfo.external_relocs); 2638 finfo.external_relocs = NULL; 2639 } 2640 if (finfo.internal_relocs != NULL) 2641 { 2642 free (finfo.internal_relocs); 2643 finfo.internal_relocs = NULL; 2644 } 2645 2646 /* The value of the last C_FILE symbol is supposed to be the symbol 2647 index of the first external symbol. Write it out again if 2648 necessary. */ 2649 if (finfo.last_file_index != -1 2650 && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd)) 2651 { 2652 finfo.last_file.n_value = obj_raw_syment_count (abfd); 2653 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, 2654 (PTR) finfo.outsyms); 2655 if (bfd_seek (abfd, 2656 (obj_sym_filepos (abfd) 2657 + finfo.last_file_index * symesz), 2658 SEEK_SET) != 0 2659 || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) 2660 return false; 2661 } 2662 2663 /* Write out the global symbols. */ 2664 finfo.failed = false; 2665 coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_global_sym, 2666 (PTR) &finfo); 2667 if (finfo.failed) 2668 goto error_return; 2669 2670 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */ 2671 if (finfo.outsyms != NULL) 2672 { 2673 free (finfo.outsyms); 2674 finfo.outsyms = NULL; 2675 } 2676 2677 if (info->relocateable) 2678 { 2679 /* Now that we have written out all the global symbols, we know 2680 the symbol indices to use for relocs against them, and we can 2681 finally write out the relocs. */ 2682 external_relocs = ((bfd_byte *) 2683 bfd_malloc (max_output_reloc_count * relsz)); 2684 if (external_relocs == NULL) 2685 goto error_return; 2686 2687 for (o = abfd->sections; o != NULL; o = o->next) 2688 { 2689 struct internal_reloc *irel; 2690 struct internal_reloc *irelend; 2691 struct coff_link_hash_entry **rel_hash; 2692 bfd_byte *erel; 2693 2694 if (o->reloc_count == 0) 2695 continue; 2696 2697 irel = finfo.section_info[o->target_index].relocs; 2698 irelend = irel + o->reloc_count; 2699 rel_hash = finfo.section_info[o->target_index].rel_hashes; 2700 erel = external_relocs; 2701 for (; irel < irelend; irel++, rel_hash++, erel += relsz) 2702 { 2703 if (*rel_hash != NULL) 2704 { 2705 BFD_ASSERT ((*rel_hash)->indx >= 0); 2706 irel->r_symndx = (*rel_hash)->indx; 2707 } 2708 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); 2709 } 2710 2711 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 2712 || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, 2713 abfd) != relsz * o->reloc_count) 2714 goto error_return; 2715 } 2716 2717 free (external_relocs); 2718 external_relocs = NULL; 2719 } 2720 2721 /* Free up the section information. */ 2722 if (finfo.section_info != NULL) 2723 { 2724 unsigned int i; 2725 2726 for (i = 0; i < abfd->section_count; i++) 2727 { 2728 if (finfo.section_info[i].relocs != NULL) 2729 free (finfo.section_info[i].relocs); 2730 if (finfo.section_info[i].rel_hashes != NULL) 2731 free (finfo.section_info[i].rel_hashes); 2732 } 2733 free (finfo.section_info); 2734 finfo.section_info = NULL; 2735 } 2736 2737 /* If we have optimized stabs strings, output them. */ 2738 if (coff_hash_table (info)->stab_info != NULL) 2739 { 2740 if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info)) 2741 return false; 2742 } 2743 2744 /* Write out the string table. */ 2745 if (obj_raw_syment_count (abfd) != 0) 2746 { 2747 if (bfd_seek (abfd, 2748 (obj_sym_filepos (abfd) 2749 + obj_raw_syment_count (abfd) * symesz), 2750 SEEK_SET) != 0) 2751 return false; 2752 2753 #if STRING_SIZE_SIZE == 4 2754 bfd_h_put_32 (abfd, 2755 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, 2756 (bfd_byte *) strbuf); 2757 #else 2758 #error Change bfd_h_put_32 2759 #endif 2760 2761 if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) 2762 return false; 2763 2764 if (! _bfd_stringtab_emit (abfd, finfo.strtab)) 2765 return false; 2766 } 2767 2768 _bfd_stringtab_free (finfo.strtab); 2769 2770 /* Setting bfd_get_symcount to 0 will cause write_object_contents to 2771 not try to write out the symbols. */ 2772 bfd_get_symcount (abfd) = 0; 2773 2774 return true; 2775 2776 error_return: 2777 if (debug_merge_allocated) 2778 coff_debug_merge_hash_table_free (&finfo.debug_merge); 2779 if (finfo.strtab != NULL) 2780 _bfd_stringtab_free (finfo.strtab); 2781 if (finfo.section_info != NULL) 2782 { 2783 unsigned int i; 2784 2785 for (i = 0; i < abfd->section_count; i++) 2786 { 2787 if (finfo.section_info[i].relocs != NULL) 2788 free (finfo.section_info[i].relocs); 2789 if (finfo.section_info[i].rel_hashes != NULL) 2790 free (finfo.section_info[i].rel_hashes); 2791 } 2792 free (finfo.section_info); 2793 } 2794 if (finfo.internal_syms != NULL) 2795 free (finfo.internal_syms); 2796 if (finfo.sec_ptrs != NULL) 2797 free (finfo.sec_ptrs); 2798 if (finfo.sym_indices != NULL) 2799 free (finfo.sym_indices); 2800 if (finfo.outsyms != NULL) 2801 free (finfo.outsyms); 2802 if (finfo.linenos != NULL) 2803 free (finfo.linenos); 2804 if (finfo.contents != NULL) 2805 free (finfo.contents); 2806 if (finfo.external_relocs != NULL) 2807 free (finfo.external_relocs); 2808 if (finfo.internal_relocs != NULL) 2809 free (finfo.internal_relocs); 2810 if (external_relocs != NULL) 2811 free (external_relocs); 2812 return false; 2813 } 2814 #endif 2815 2816 /* Forward declaration for use by alternative_target field. */ 2817 #ifdef TARGET_BIG_SYM 2818 extern const bfd_target TARGET_BIG_SYM; 2819 #endif 2820 2821 /* The transfer vectors that lead the outside world to all of the above. */ 2822 2823 #ifdef TARGET_LITTLE_SYM 2824 const bfd_target TARGET_LITTLE_SYM = 2825 { 2826 TARGET_LITTLE_NAME, /* name or coff-arm-little */ 2827 bfd_target_coff_flavour, 2828 BFD_ENDIAN_LITTLE, /* data byte order is little */ 2829 BFD_ENDIAN_LITTLE, /* header byte order is little */ 2830 2831 (HAS_RELOC | EXEC_P | /* FIXME: object flags */ 2832 HAS_LINENO | HAS_DEBUG | 2833 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 2834 2835 #ifndef COFF_WITH_PE 2836 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 2837 #else 2838 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ 2839 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), 2840 #endif 2841 2842 0, /* leading char */ 2843 '/', /* ar_pad_char */ 2844 15, /* ar_max_namelen??? FIXMEmgo */ 2845 2846 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 2847 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 2848 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ 2849 2850 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 2851 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 2852 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ 2853 2854 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ 2855 bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p }, 2856 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ 2857 bfd_false}, 2858 {bfd_false, coff_write_object_contents, /* bfd_write_contents */ 2859 _bfd_write_archive_contents, bfd_false}, 2860 2861 BFD_JUMP_TABLE_GENERIC (coff), 2862 BFD_JUMP_TABLE_COPY (coff), 2863 BFD_JUMP_TABLE_CORE (_bfd_nocore), 2864 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 2865 BFD_JUMP_TABLE_SYMBOLS (coff), 2866 BFD_JUMP_TABLE_RELOCS (coff), 2867 BFD_JUMP_TABLE_WRITE (coff), 2868 BFD_JUMP_TABLE_LINK (coff), 2869 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 2870 2871 /* Alternative_target. */ 2872 #ifdef TARGET_BIG_SYM 2873 & TARGET_BIG_SYM, 2874 #else 2875 NULL, 2876 #endif 2877 2878 COFF_SWAP_TABLE 2879 }; 2880 #endif 2881 2882 #ifdef TARGET_BIG_SYM 2883 const bfd_target TARGET_BIG_SYM = 2884 { 2885 TARGET_BIG_NAME, 2886 bfd_target_coff_flavour, 2887 BFD_ENDIAN_BIG, /* data byte order is big */ 2888 BFD_ENDIAN_BIG, /* header byte order is big */ 2889 2890 (HAS_RELOC | EXEC_P | /* FIXME: object flags */ 2891 HAS_LINENO | HAS_DEBUG | 2892 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 2893 2894 #ifndef COFF_WITH_PE 2895 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 2896 #else 2897 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ 2898 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), 2899 #endif 2900 2901 0, /* leading char */ 2902 '/', /* ar_pad_char */ 2903 15, /* ar_max_namelen??? FIXMEmgo */ 2904 2905 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 2906 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 2907 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ 2908 2909 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 2910 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 2911 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ 2912 2913 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ 2914 bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p }, 2915 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ 2916 bfd_false}, 2917 {bfd_false, coff_write_object_contents, /* bfd_write_contents */ 2918 _bfd_write_archive_contents, bfd_false}, 2919 2920 BFD_JUMP_TABLE_GENERIC (coff), 2921 BFD_JUMP_TABLE_COPY (coff), 2922 BFD_JUMP_TABLE_CORE (_bfd_nocore), 2923 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 2924 BFD_JUMP_TABLE_SYMBOLS (coff), 2925 BFD_JUMP_TABLE_RELOCS (coff), 2926 BFD_JUMP_TABLE_WRITE (coff), 2927 BFD_JUMP_TABLE_LINK (coff), 2928 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 2929 2930 /* Alternative_target. */ 2931 #ifdef TARGET_LITTLE_SYM 2932 & TARGET_LITTLE_SYM, 2933 #else 2934 NULL, 2935 #endif 2936 2937 COFF_SWAP_TABLE 2938 }; 2939 2940 #endif 2941