reloc.c revision 89857
1/* BFD support for handling relocation entries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7This file is part of BFD, the Binary File Descriptor library. 8 9This program is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2 of the License, or 12(at your option) any later version. 13 14This program is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with this program; if not, write to the Free Software 21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 22 23/* 24SECTION 25 Relocations 26 27 BFD maintains relocations in much the same way it maintains 28 symbols: they are left alone until required, then read in 29 en-masse and translated into an internal form. A common 30 routine <<bfd_perform_relocation>> acts upon the 31 canonical form to do the fixup. 32 33 Relocations are maintained on a per section basis, 34 while symbols are maintained on a per BFD basis. 35 36 All that a back end has to do to fit the BFD interface is to create 37 a <<struct reloc_cache_entry>> for each relocation 38 in a particular section, and fill in the right bits of the structures. 39 40@menu 41@* typedef arelent:: 42@* howto manager:: 43@end menu 44 45*/ 46 47/* DO compile in the reloc_code name table from libbfd.h. */ 48#define _BFD_MAKE_TABLE_bfd_reloc_code_real 49 50#include "bfd.h" 51#include "sysdep.h" 52#include "bfdlink.h" 53#include "libbfd.h" 54/* 55DOCDD 56INODE 57 typedef arelent, howto manager, Relocations, Relocations 58 59SUBSECTION 60 typedef arelent 61 62 This is the structure of a relocation entry: 63 64CODE_FRAGMENT 65. 66.typedef enum bfd_reloc_status 67.{ 68. {* No errors detected *} 69. bfd_reloc_ok, 70. 71. {* The relocation was performed, but there was an overflow. *} 72. bfd_reloc_overflow, 73. 74. {* The address to relocate was not within the section supplied. *} 75. bfd_reloc_outofrange, 76. 77. {* Used by special functions *} 78. bfd_reloc_continue, 79. 80. {* Unsupported relocation size requested. *} 81. bfd_reloc_notsupported, 82. 83. {* Unused *} 84. bfd_reloc_other, 85. 86. {* The symbol to relocate against was undefined. *} 87. bfd_reloc_undefined, 88. 89. {* The relocation was performed, but may not be ok - presently 90. generated only when linking i960 coff files with i960 b.out 91. symbols. If this type is returned, the error_message argument 92. to bfd_perform_relocation will be set. *} 93. bfd_reloc_dangerous 94. } 95. bfd_reloc_status_type; 96. 97. 98.typedef struct reloc_cache_entry 99.{ 100. {* A pointer into the canonical table of pointers *} 101. struct symbol_cache_entry **sym_ptr_ptr; 102. 103. {* offset in section *} 104. bfd_size_type address; 105. 106. {* addend for relocation value *} 107. bfd_vma addend; 108. 109. {* Pointer to how to perform the required relocation *} 110. reloc_howto_type *howto; 111. 112.} arelent; 113 114*/ 115 116/* 117DESCRIPTION 118 119 Here is a description of each of the fields within an <<arelent>>: 120 121 o <<sym_ptr_ptr>> 122 123 The symbol table pointer points to a pointer to the symbol 124 associated with the relocation request. It is 125 the pointer into the table returned by the back end's 126 <<get_symtab>> action. @xref{Symbols}. The symbol is referenced 127 through a pointer to a pointer so that tools like the linker 128 can fix up all the symbols of the same name by modifying only 129 one pointer. The relocation routine looks in the symbol and 130 uses the base of the section the symbol is attached to and the 131 value of the symbol as the initial relocation offset. If the 132 symbol pointer is zero, then the section provided is looked up. 133 134 o <<address>> 135 136 The <<address>> field gives the offset in bytes from the base of 137 the section data which owns the relocation record to the first 138 byte of relocatable information. The actual data relocated 139 will be relative to this point; for example, a relocation 140 type which modifies the bottom two bytes of a four byte word 141 would not touch the first byte pointed to in a big endian 142 world. 143 144 o <<addend>> 145 146 The <<addend>> is a value provided by the back end to be added (!) 147 to the relocation offset. Its interpretation is dependent upon 148 the howto. For example, on the 68k the code: 149 150| char foo[]; 151| main() 152| { 153| return foo[0x12345678]; 154| } 155 156 Could be compiled into: 157 158| linkw fp,#-4 159| moveb @@#12345678,d0 160| extbl d0 161| unlk fp 162| rts 163 164 This could create a reloc pointing to <<foo>>, but leave the 165 offset in the data, something like: 166 167|RELOCATION RECORDS FOR [.text]: 168|offset type value 169|00000006 32 _foo 170| 171|00000000 4e56 fffc ; linkw fp,#-4 172|00000004 1039 1234 5678 ; moveb @@#12345678,d0 173|0000000a 49c0 ; extbl d0 174|0000000c 4e5e ; unlk fp 175|0000000e 4e75 ; rts 176 177 Using coff and an 88k, some instructions don't have enough 178 space in them to represent the full address range, and 179 pointers have to be loaded in two parts. So you'd get something like: 180 181| or.u r13,r0,hi16(_foo+0x12345678) 182| ld.b r2,r13,lo16(_foo+0x12345678) 183| jmp r1 184 185 This should create two relocs, both pointing to <<_foo>>, and with 186 0x12340000 in their addend field. The data would consist of: 187 188|RELOCATION RECORDS FOR [.text]: 189|offset type value 190|00000002 HVRT16 _foo+0x12340000 191|00000006 LVRT16 _foo+0x12340000 192| 193|00000000 5da05678 ; or.u r13,r0,0x5678 194|00000004 1c4d5678 ; ld.b r2,r13,0x5678 195|00000008 f400c001 ; jmp r1 196 197 The relocation routine digs out the value from the data, adds 198 it to the addend to get the original offset, and then adds the 199 value of <<_foo>>. Note that all 32 bits have to be kept around 200 somewhere, to cope with carry from bit 15 to bit 16. 201 202 One further example is the sparc and the a.out format. The 203 sparc has a similar problem to the 88k, in that some 204 instructions don't have room for an entire offset, but on the 205 sparc the parts are created in odd sized lumps. The designers of 206 the a.out format chose to not use the data within the section 207 for storing part of the offset; all the offset is kept within 208 the reloc. Anything in the data should be ignored. 209 210| save %sp,-112,%sp 211| sethi %hi(_foo+0x12345678),%g2 212| ldsb [%g2+%lo(_foo+0x12345678)],%i0 213| ret 214| restore 215 216 Both relocs contain a pointer to <<foo>>, and the offsets 217 contain junk. 218 219|RELOCATION RECORDS FOR [.text]: 220|offset type value 221|00000004 HI22 _foo+0x12345678 222|00000008 LO10 _foo+0x12345678 223| 224|00000000 9de3bf90 ; save %sp,-112,%sp 225|00000004 05000000 ; sethi %hi(_foo+0),%g2 226|00000008 f048a000 ; ldsb [%g2+%lo(_foo+0)],%i0 227|0000000c 81c7e008 ; ret 228|00000010 81e80000 ; restore 229 230 o <<howto>> 231 232 The <<howto>> field can be imagined as a 233 relocation instruction. It is a pointer to a structure which 234 contains information on what to do with all of the other 235 information in the reloc record and data section. A back end 236 would normally have a relocation instruction set and turn 237 relocations into pointers to the correct structure on input - 238 but it would be possible to create each howto field on demand. 239 240*/ 241 242/* 243SUBSUBSECTION 244 <<enum complain_overflow>> 245 246 Indicates what sort of overflow checking should be done when 247 performing a relocation. 248 249CODE_FRAGMENT 250. 251.enum complain_overflow 252.{ 253. {* Do not complain on overflow. *} 254. complain_overflow_dont, 255. 256. {* Complain if the bitfield overflows, whether it is considered 257. as signed or unsigned. *} 258. complain_overflow_bitfield, 259. 260. {* Complain if the value overflows when considered as signed 261. number. *} 262. complain_overflow_signed, 263. 264. {* Complain if the value overflows when considered as an 265. unsigned number. *} 266. complain_overflow_unsigned 267.}; 268 269*/ 270 271/* 272SUBSUBSECTION 273 <<reloc_howto_type>> 274 275 The <<reloc_howto_type>> is a structure which contains all the 276 information that libbfd needs to know to tie up a back end's data. 277 278CODE_FRAGMENT 279.struct symbol_cache_entry; {* Forward declaration *} 280. 281.struct reloc_howto_struct 282.{ 283. {* The type field has mainly a documentary use - the back end can 284. do what it wants with it, though normally the back end's 285. external idea of what a reloc number is stored 286. in this field. For example, a PC relative word relocation 287. in a coff environment has the type 023 - because that's 288. what the outside world calls a R_PCRWORD reloc. *} 289. unsigned int type; 290. 291. {* The value the final relocation is shifted right by. This drops 292. unwanted data from the relocation. *} 293. unsigned int rightshift; 294. 295. {* The size of the item to be relocated. This is *not* a 296. power-of-two measure. To get the number of bytes operated 297. on by a type of relocation, use bfd_get_reloc_size. *} 298. int size; 299. 300. {* The number of bits in the item to be relocated. This is used 301. when doing overflow checking. *} 302. unsigned int bitsize; 303. 304. {* Notes that the relocation is relative to the location in the 305. data section of the addend. The relocation function will 306. subtract from the relocation value the address of the location 307. being relocated. *} 308. boolean pc_relative; 309. 310. {* The bit position of the reloc value in the destination. 311. The relocated value is left shifted by this amount. *} 312. unsigned int bitpos; 313. 314. {* What type of overflow error should be checked for when 315. relocating. *} 316. enum complain_overflow complain_on_overflow; 317. 318. {* If this field is non null, then the supplied function is 319. called rather than the normal function. This allows really 320. strange relocation methods to be accomodated (e.g., i960 callj 321. instructions). *} 322. bfd_reloc_status_type (*special_function) 323. PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR, asection *, 324. bfd *, char **)); 325. 326. {* The textual name of the relocation type. *} 327. char *name; 328. 329. {* Some formats record a relocation addend in the section contents 330. rather than with the relocation. For ELF formats this is the 331. distinction between USE_REL and USE_RELA (though the code checks 332. for USE_REL == 1/0). The value of this field is TRUE if the 333. addend is recorded with the section contents; when performing a 334. partial link (ld -r) the section contents (the data) will be 335. modified. The value of this field is FALSE if addends are 336. recorded with the relocation (in arelent.addend); when performing 337. a partial link the relocation will be modified. 338. All relocations for all ELF USE_RELA targets should set this field 339. to FALSE (values of TRUE should be looked on with suspicion). 340. However, the converse is not true: not all relocations of all ELF 341. USE_REL targets set this field to TRUE. Why this is so is peculiar 342. to each particular target. For relocs that aren't used in partial 343. links (e.g. GOT stuff) it doesn't matter what this is set to. *} 344. boolean partial_inplace; 345. 346. {* The src_mask selects which parts of the read in data 347. are to be used in the relocation sum. E.g., if this was an 8 bit 348. byte of data which we read and relocated, this would be 349. 0x000000ff. When we have relocs which have an addend, such as 350. sun4 extended relocs, the value in the offset part of a 351. relocating field is garbage so we never use it. In this case 352. the mask would be 0x00000000. *} 353. bfd_vma src_mask; 354. 355. {* The dst_mask selects which parts of the instruction are replaced 356. into the instruction. In most cases src_mask == dst_mask, 357. except in the above special case, where dst_mask would be 358. 0x000000ff, and src_mask would be 0x00000000. *} 359. bfd_vma dst_mask; 360. 361. {* When some formats create PC relative instructions, they leave 362. the value of the pc of the place being relocated in the offset 363. slot of the instruction, so that a PC relative relocation can 364. be made just by adding in an ordinary offset (e.g., sun3 a.out). 365. Some formats leave the displacement part of an instruction 366. empty (e.g., m88k bcs); this flag signals the fact. *} 367. boolean pcrel_offset; 368.}; 369 370*/ 371 372/* 373FUNCTION 374 The HOWTO Macro 375 376DESCRIPTION 377 The HOWTO define is horrible and will go away. 378 379.#define HOWTO(C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \ 380. { (unsigned) C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC } 381 382DESCRIPTION 383 And will be replaced with the totally magic way. But for the 384 moment, we are compatible, so do it this way. 385 386.#define NEWHOWTO(FUNCTION, NAME, SIZE, REL, IN) \ 387. HOWTO (0, 0, SIZE, 0, REL, 0, complain_overflow_dont, FUNCTION, \ 388. NAME, false, 0, 0, IN) 389. 390 391DESCRIPTION 392 This is used to fill in an empty howto entry in an array. 393 394.#define EMPTY_HOWTO(C) \ 395. HOWTO ((C), 0, 0, 0, false, 0, complain_overflow_dont, NULL, \ 396. NULL, false, 0, 0, false) 397. 398 399DESCRIPTION 400 Helper routine to turn a symbol into a relocation value. 401 402.#define HOWTO_PREPARE(relocation, symbol) \ 403. { \ 404. if (symbol != (asymbol *) NULL) \ 405. { \ 406. if (bfd_is_com_section (symbol->section)) \ 407. { \ 408. relocation = 0; \ 409. } \ 410. else \ 411. { \ 412. relocation = symbol->value; \ 413. } \ 414. } \ 415. } 416 417*/ 418 419/* 420FUNCTION 421 bfd_get_reloc_size 422 423SYNOPSIS 424 unsigned int bfd_get_reloc_size (reloc_howto_type *); 425 426DESCRIPTION 427 For a reloc_howto_type that operates on a fixed number of bytes, 428 this returns the number of bytes operated on. 429 */ 430 431unsigned int 432bfd_get_reloc_size (howto) 433 reloc_howto_type *howto; 434{ 435 switch (howto->size) 436 { 437 case 0: return 1; 438 case 1: return 2; 439 case 2: return 4; 440 case 3: return 0; 441 case 4: return 8; 442 case 8: return 16; 443 case -2: return 4; 444 default: abort (); 445 } 446} 447 448/* 449TYPEDEF 450 arelent_chain 451 452DESCRIPTION 453 454 How relocs are tied together in an <<asection>>: 455 456.typedef struct relent_chain 457.{ 458. arelent relent; 459. struct relent_chain *next; 460.} arelent_chain; 461 462*/ 463 464/* N_ONES produces N one bits, without overflowing machine arithmetic. */ 465#define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1) 466 467/* 468FUNCTION 469 bfd_check_overflow 470 471SYNOPSIS 472 bfd_reloc_status_type 473 bfd_check_overflow 474 (enum complain_overflow how, 475 unsigned int bitsize, 476 unsigned int rightshift, 477 unsigned int addrsize, 478 bfd_vma relocation); 479 480DESCRIPTION 481 Perform overflow checking on @var{relocation} which has 482 @var{bitsize} significant bits and will be shifted right by 483 @var{rightshift} bits, on a machine with addresses containing 484 @var{addrsize} significant bits. The result is either of 485 @code{bfd_reloc_ok} or @code{bfd_reloc_overflow}. 486 487*/ 488 489bfd_reloc_status_type 490bfd_check_overflow (how, bitsize, rightshift, addrsize, relocation) 491 enum complain_overflow how; 492 unsigned int bitsize; 493 unsigned int rightshift; 494 unsigned int addrsize; 495 bfd_vma relocation; 496{ 497 bfd_vma fieldmask, addrmask, signmask, ss, a; 498 bfd_reloc_status_type flag = bfd_reloc_ok; 499 500 a = relocation; 501 502 /* Note: BITSIZE should always be <= ADDRSIZE, but in case it's not, 503 we'll be permissive: extra bits in the field mask will 504 automatically extend the address mask for purposes of the 505 overflow check. */ 506 fieldmask = N_ONES (bitsize); 507 addrmask = N_ONES (addrsize) | fieldmask; 508 509 switch (how) 510 { 511 case complain_overflow_dont: 512 break; 513 514 case complain_overflow_signed: 515 /* If any sign bits are set, all sign bits must be set. That 516 is, A must be a valid negative address after shifting. */ 517 a = (a & addrmask) >> rightshift; 518 signmask = ~ (fieldmask >> 1); 519 ss = a & signmask; 520 if (ss != 0 && ss != ((addrmask >> rightshift) & signmask)) 521 flag = bfd_reloc_overflow; 522 break; 523 524 case complain_overflow_unsigned: 525 /* We have an overflow if the address does not fit in the field. */ 526 a = (a & addrmask) >> rightshift; 527 if ((a & ~ fieldmask) != 0) 528 flag = bfd_reloc_overflow; 529 break; 530 531 case complain_overflow_bitfield: 532 /* Bitfields are sometimes signed, sometimes unsigned. We 533 explicitly allow an address wrap too, which means a bitfield 534 of n bits is allowed to store -2**n to 2**n-1. Thus overflow 535 if the value has some, but not all, bits set outside the 536 field. */ 537 a >>= rightshift; 538 ss = a & ~ fieldmask; 539 if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & ~ fieldmask)) 540 flag = bfd_reloc_overflow; 541 break; 542 543 default: 544 abort (); 545 } 546 547 return flag; 548} 549 550/* 551FUNCTION 552 bfd_perform_relocation 553 554SYNOPSIS 555 bfd_reloc_status_type 556 bfd_perform_relocation 557 (bfd *abfd, 558 arelent *reloc_entry, 559 PTR data, 560 asection *input_section, 561 bfd *output_bfd, 562 char **error_message); 563 564DESCRIPTION 565 If @var{output_bfd} is supplied to this function, the 566 generated image will be relocatable; the relocations are 567 copied to the output file after they have been changed to 568 reflect the new state of the world. There are two ways of 569 reflecting the results of partial linkage in an output file: 570 by modifying the output data in place, and by modifying the 571 relocation record. Some native formats (e.g., basic a.out and 572 basic coff) have no way of specifying an addend in the 573 relocation type, so the addend has to go in the output data. 574 This is no big deal since in these formats the output data 575 slot will always be big enough for the addend. Complex reloc 576 types with addends were invented to solve just this problem. 577 The @var{error_message} argument is set to an error message if 578 this return @code{bfd_reloc_dangerous}. 579 580*/ 581 582bfd_reloc_status_type 583bfd_perform_relocation (abfd, reloc_entry, data, input_section, output_bfd, 584 error_message) 585 bfd *abfd; 586 arelent *reloc_entry; 587 PTR data; 588 asection *input_section; 589 bfd *output_bfd; 590 char **error_message; 591{ 592 bfd_vma relocation; 593 bfd_reloc_status_type flag = bfd_reloc_ok; 594 bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); 595 bfd_vma output_base = 0; 596 reloc_howto_type *howto = reloc_entry->howto; 597 asection *reloc_target_output_section; 598 asymbol *symbol; 599 600 symbol = *(reloc_entry->sym_ptr_ptr); 601 if (bfd_is_abs_section (symbol->section) 602 && output_bfd != (bfd *) NULL) 603 { 604 reloc_entry->address += input_section->output_offset; 605 return bfd_reloc_ok; 606 } 607 608 /* If we are not producing relocateable output, return an error if 609 the symbol is not defined. An undefined weak symbol is 610 considered to have a value of zero (SVR4 ABI, p. 4-27). */ 611 if (bfd_is_und_section (symbol->section) 612 && (symbol->flags & BSF_WEAK) == 0 613 && output_bfd == (bfd *) NULL) 614 flag = bfd_reloc_undefined; 615 616 /* If there is a function supplied to handle this relocation type, 617 call it. It'll return `bfd_reloc_continue' if further processing 618 can be done. */ 619 if (howto->special_function) 620 { 621 bfd_reloc_status_type cont; 622 cont = howto->special_function (abfd, reloc_entry, symbol, data, 623 input_section, output_bfd, 624 error_message); 625 if (cont != bfd_reloc_continue) 626 return cont; 627 } 628 629 /* Is the address of the relocation really within the section? */ 630 if (reloc_entry->address > (input_section->_cooked_size 631 / bfd_octets_per_byte (abfd))) 632 return bfd_reloc_outofrange; 633 634 /* Work out which section the relocation is targetted at and the 635 initial relocation command value. */ 636 637 /* Get symbol value. (Common symbols are special.) */ 638 if (bfd_is_com_section (symbol->section)) 639 relocation = 0; 640 else 641 relocation = symbol->value; 642 643 reloc_target_output_section = symbol->section->output_section; 644 645 /* Convert input-section-relative symbol value to absolute. */ 646 if (output_bfd && howto->partial_inplace == false) 647 output_base = 0; 648 else 649 output_base = reloc_target_output_section->vma; 650 651 relocation += output_base + symbol->section->output_offset; 652 653 /* Add in supplied addend. */ 654 relocation += reloc_entry->addend; 655 656 /* Here the variable relocation holds the final address of the 657 symbol we are relocating against, plus any addend. */ 658 659 if (howto->pc_relative == true) 660 { 661 /* This is a PC relative relocation. We want to set RELOCATION 662 to the distance between the address of the symbol and the 663 location. RELOCATION is already the address of the symbol. 664 665 We start by subtracting the address of the section containing 666 the location. 667 668 If pcrel_offset is set, we must further subtract the position 669 of the location within the section. Some targets arrange for 670 the addend to be the negative of the position of the location 671 within the section; for example, i386-aout does this. For 672 i386-aout, pcrel_offset is false. Some other targets do not 673 include the position of the location; for example, m88kbcs, 674 or ELF. For those targets, pcrel_offset is true. 675 676 If we are producing relocateable output, then we must ensure 677 that this reloc will be correctly computed when the final 678 relocation is done. If pcrel_offset is false we want to wind 679 up with the negative of the location within the section, 680 which means we must adjust the existing addend by the change 681 in the location within the section. If pcrel_offset is true 682 we do not want to adjust the existing addend at all. 683 684 FIXME: This seems logical to me, but for the case of 685 producing relocateable output it is not what the code 686 actually does. I don't want to change it, because it seems 687 far too likely that something will break. */ 688 689 relocation -= 690 input_section->output_section->vma + input_section->output_offset; 691 692 if (howto->pcrel_offset == true) 693 relocation -= reloc_entry->address; 694 } 695 696 if (output_bfd != (bfd *) NULL) 697 { 698 if (howto->partial_inplace == false) 699 { 700 /* This is a partial relocation, and we want to apply the relocation 701 to the reloc entry rather than the raw data. Modify the reloc 702 inplace to reflect what we now know. */ 703 reloc_entry->addend = relocation; 704 reloc_entry->address += input_section->output_offset; 705 return flag; 706 } 707 else 708 { 709 /* This is a partial relocation, but inplace, so modify the 710 reloc record a bit. 711 712 If we've relocated with a symbol with a section, change 713 into a ref to the section belonging to the symbol. */ 714 715 reloc_entry->address += input_section->output_offset; 716 717 /* WTF?? */ 718 if (abfd->xvec->flavour == bfd_target_coff_flavour 719 && strcmp (abfd->xvec->name, "coff-Intel-little") != 0 720 && strcmp (abfd->xvec->name, "coff-Intel-big") != 0) 721 { 722#if 1 723 /* For m68k-coff, the addend was being subtracted twice during 724 relocation with -r. Removing the line below this comment 725 fixes that problem; see PR 2953. 726 727However, Ian wrote the following, regarding removing the line below, 728which explains why it is still enabled: --djm 729 730If you put a patch like that into BFD you need to check all the COFF 731linkers. I am fairly certain that patch will break coff-i386 (e.g., 732SCO); see coff_i386_reloc in coff-i386.c where I worked around the 733problem in a different way. There may very well be a reason that the 734code works as it does. 735 736Hmmm. The first obvious point is that bfd_perform_relocation should 737not have any tests that depend upon the flavour. It's seem like 738entirely the wrong place for such a thing. The second obvious point 739is that the current code ignores the reloc addend when producing 740relocateable output for COFF. That's peculiar. In fact, I really 741have no idea what the point of the line you want to remove is. 742 743A typical COFF reloc subtracts the old value of the symbol and adds in 744the new value to the location in the object file (if it's a pc 745relative reloc it adds the difference between the symbol value and the 746location). When relocating we need to preserve that property. 747 748BFD handles this by setting the addend to the negative of the old 749value of the symbol. Unfortunately it handles common symbols in a 750non-standard way (it doesn't subtract the old value) but that's a 751different story (we can't change it without losing backward 752compatibility with old object files) (coff-i386 does subtract the old 753value, to be compatible with existing coff-i386 targets, like SCO). 754 755So everything works fine when not producing relocateable output. When 756we are producing relocateable output, logically we should do exactly 757what we do when not producing relocateable output. Therefore, your 758patch is correct. In fact, it should probably always just set 759reloc_entry->addend to 0 for all cases, since it is, in fact, going to 760add the value into the object file. This won't hurt the COFF code, 761which doesn't use the addend; I'm not sure what it will do to other 762formats (the thing to check for would be whether any formats both use 763the addend and set partial_inplace). 764 765When I wanted to make coff-i386 produce relocateable output, I ran 766into the problem that you are running into: I wanted to remove that 767line. Rather than risk it, I made the coff-i386 relocs use a special 768function; it's coff_i386_reloc in coff-i386.c. The function 769specifically adds the addend field into the object file, knowing that 770bfd_perform_relocation is not going to. If you remove that line, then 771coff-i386.c will wind up adding the addend field in twice. It's 772trivial to fix; it just needs to be done. 773 774The problem with removing the line is just that it may break some 775working code. With BFD it's hard to be sure of anything. The right 776way to deal with this is simply to build and test at least all the 777supported COFF targets. It should be straightforward if time and disk 778space consuming. For each target: 779 1) build the linker 780 2) generate some executable, and link it using -r (I would 781 probably use paranoia.o and link against newlib/libc.a, which 782 for all the supported targets would be available in 783 /usr/cygnus/progressive/H-host/target/lib/libc.a). 784 3) make the change to reloc.c 785 4) rebuild the linker 786 5) repeat step 2 787 6) if the resulting object files are the same, you have at least 788 made it no worse 789 7) if they are different you have to figure out which version is 790 right 791*/ 792 relocation -= reloc_entry->addend; 793#endif 794 reloc_entry->addend = 0; 795 } 796 else 797 { 798 reloc_entry->addend = relocation; 799 } 800 } 801 } 802 else 803 { 804 reloc_entry->addend = 0; 805 } 806 807 /* FIXME: This overflow checking is incomplete, because the value 808 might have overflowed before we get here. For a correct check we 809 need to compute the value in a size larger than bitsize, but we 810 can't reasonably do that for a reloc the same size as a host 811 machine word. 812 FIXME: We should also do overflow checking on the result after 813 adding in the value contained in the object file. */ 814 if (howto->complain_on_overflow != complain_overflow_dont 815 && flag == bfd_reloc_ok) 816 flag = bfd_check_overflow (howto->complain_on_overflow, 817 howto->bitsize, 818 howto->rightshift, 819 bfd_arch_bits_per_address (abfd), 820 relocation); 821 822 /* 823 Either we are relocating all the way, or we don't want to apply 824 the relocation to the reloc entry (probably because there isn't 825 any room in the output format to describe addends to relocs) 826 */ 827 828 /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler 829 (OSF version 1.3, compiler version 3.11). It miscompiles the 830 following program: 831 832 struct str 833 { 834 unsigned int i0; 835 } s = { 0 }; 836 837 int 838 main () 839 { 840 unsigned long x; 841 842 x = 0x100000000; 843 x <<= (unsigned long) s.i0; 844 if (x == 0) 845 printf ("failed\n"); 846 else 847 printf ("succeeded (%lx)\n", x); 848 } 849 */ 850 851 relocation >>= (bfd_vma) howto->rightshift; 852 853 /* Shift everything up to where it's going to be used */ 854 855 relocation <<= (bfd_vma) howto->bitpos; 856 857 /* Wait for the day when all have the mask in them */ 858 859 /* What we do: 860 i instruction to be left alone 861 o offset within instruction 862 r relocation offset to apply 863 S src mask 864 D dst mask 865 N ~dst mask 866 A part 1 867 B part 2 868 R result 869 870 Do this: 871 (( i i i i i o o o o o from bfd_get<size> 872 and S S S S S) to get the size offset we want 873 + r r r r r r r r r r) to get the final value to place 874 and D D D D D to chop to right size 875 ----------------------- 876 = A A A A A 877 And this: 878 ( i i i i i o o o o o from bfd_get<size> 879 and N N N N N ) get instruction 880 ----------------------- 881 = B B B B B 882 883 And then: 884 ( B B B B B 885 or A A A A A) 886 ----------------------- 887 = R R R R R R R R R R put into bfd_put<size> 888 */ 889 890#define DOIT(x) \ 891 x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask)) 892 893 switch (howto->size) 894 { 895 case 0: 896 { 897 char x = bfd_get_8 (abfd, (char *) data + octets); 898 DOIT (x); 899 bfd_put_8 (abfd, x, (unsigned char *) data + octets); 900 } 901 break; 902 903 case 1: 904 { 905 short x = bfd_get_16 (abfd, (bfd_byte *) data + octets); 906 DOIT (x); 907 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + octets); 908 } 909 break; 910 case 2: 911 { 912 long x = bfd_get_32 (abfd, (bfd_byte *) data + octets); 913 DOIT (x); 914 bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets); 915 } 916 break; 917 case -2: 918 { 919 long x = bfd_get_32 (abfd, (bfd_byte *) data + octets); 920 relocation = -relocation; 921 DOIT (x); 922 bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets); 923 } 924 break; 925 926 case -1: 927 { 928 long x = bfd_get_16 (abfd, (bfd_byte *) data + octets); 929 relocation = -relocation; 930 DOIT (x); 931 bfd_put_16 (abfd, (bfd_vma) x, (bfd_byte *) data + octets); 932 } 933 break; 934 935 case 3: 936 /* Do nothing */ 937 break; 938 939 case 4: 940#ifdef BFD64 941 { 942 bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data + octets); 943 DOIT (x); 944 bfd_put_64 (abfd, x, (bfd_byte *) data + octets); 945 } 946#else 947 abort (); 948#endif 949 break; 950 default: 951 return bfd_reloc_other; 952 } 953 954 return flag; 955} 956 957/* 958FUNCTION 959 bfd_install_relocation 960 961SYNOPSIS 962 bfd_reloc_status_type 963 bfd_install_relocation 964 (bfd *abfd, 965 arelent *reloc_entry, 966 PTR data, bfd_vma data_start, 967 asection *input_section, 968 char **error_message); 969 970DESCRIPTION 971 This looks remarkably like <<bfd_perform_relocation>>, except it 972 does not expect that the section contents have been filled in. 973 I.e., it's suitable for use when creating, rather than applying 974 a relocation. 975 976 For now, this function should be considered reserved for the 977 assembler. 978 979*/ 980 981bfd_reloc_status_type 982bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset, 983 input_section, error_message) 984 bfd *abfd; 985 arelent *reloc_entry; 986 PTR data_start; 987 bfd_vma data_start_offset; 988 asection *input_section; 989 char **error_message; 990{ 991 bfd_vma relocation; 992 bfd_reloc_status_type flag = bfd_reloc_ok; 993 bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); 994 bfd_vma output_base = 0; 995 reloc_howto_type *howto = reloc_entry->howto; 996 asection *reloc_target_output_section; 997 asymbol *symbol; 998 bfd_byte *data; 999 1000 symbol = *(reloc_entry->sym_ptr_ptr); 1001 if (bfd_is_abs_section (symbol->section)) 1002 { 1003 reloc_entry->address += input_section->output_offset; 1004 return bfd_reloc_ok; 1005 } 1006 1007 /* If there is a function supplied to handle this relocation type, 1008 call it. It'll return `bfd_reloc_continue' if further processing 1009 can be done. */ 1010 if (howto->special_function) 1011 { 1012 bfd_reloc_status_type cont; 1013 1014 /* XXX - The special_function calls haven't been fixed up to deal 1015 with creating new relocations and section contents. */ 1016 cont = howto->special_function (abfd, reloc_entry, symbol, 1017 /* XXX - Non-portable! */ 1018 ((bfd_byte *) data_start 1019 - data_start_offset), 1020 input_section, abfd, error_message); 1021 if (cont != bfd_reloc_continue) 1022 return cont; 1023 } 1024 1025 /* Is the address of the relocation really within the section? */ 1026 if (reloc_entry->address > (input_section->_cooked_size 1027 / bfd_octets_per_byte (abfd))) 1028 return bfd_reloc_outofrange; 1029 1030 /* Work out which section the relocation is targetted at and the 1031 initial relocation command value. */ 1032 1033 /* Get symbol value. (Common symbols are special.) */ 1034 if (bfd_is_com_section (symbol->section)) 1035 relocation = 0; 1036 else 1037 relocation = symbol->value; 1038 1039 reloc_target_output_section = symbol->section->output_section; 1040 1041 /* Convert input-section-relative symbol value to absolute. */ 1042 if (howto->partial_inplace == false) 1043 output_base = 0; 1044 else 1045 output_base = reloc_target_output_section->vma; 1046 1047 relocation += output_base + symbol->section->output_offset; 1048 1049 /* Add in supplied addend. */ 1050 relocation += reloc_entry->addend; 1051 1052 /* Here the variable relocation holds the final address of the 1053 symbol we are relocating against, plus any addend. */ 1054 1055 if (howto->pc_relative == true) 1056 { 1057 /* This is a PC relative relocation. We want to set RELOCATION 1058 to the distance between the address of the symbol and the 1059 location. RELOCATION is already the address of the symbol. 1060 1061 We start by subtracting the address of the section containing 1062 the location. 1063 1064 If pcrel_offset is set, we must further subtract the position 1065 of the location within the section. Some targets arrange for 1066 the addend to be the negative of the position of the location 1067 within the section; for example, i386-aout does this. For 1068 i386-aout, pcrel_offset is false. Some other targets do not 1069 include the position of the location; for example, m88kbcs, 1070 or ELF. For those targets, pcrel_offset is true. 1071 1072 If we are producing relocateable output, then we must ensure 1073 that this reloc will be correctly computed when the final 1074 relocation is done. If pcrel_offset is false we want to wind 1075 up with the negative of the location within the section, 1076 which means we must adjust the existing addend by the change 1077 in the location within the section. If pcrel_offset is true 1078 we do not want to adjust the existing addend at all. 1079 1080 FIXME: This seems logical to me, but for the case of 1081 producing relocateable output it is not what the code 1082 actually does. I don't want to change it, because it seems 1083 far too likely that something will break. */ 1084 1085 relocation -= 1086 input_section->output_section->vma + input_section->output_offset; 1087 1088 if (howto->pcrel_offset == true && howto->partial_inplace == true) 1089 relocation -= reloc_entry->address; 1090 } 1091 1092 if (howto->partial_inplace == false) 1093 { 1094 /* This is a partial relocation, and we want to apply the relocation 1095 to the reloc entry rather than the raw data. Modify the reloc 1096 inplace to reflect what we now know. */ 1097 reloc_entry->addend = relocation; 1098 reloc_entry->address += input_section->output_offset; 1099 return flag; 1100 } 1101 else 1102 { 1103 /* This is a partial relocation, but inplace, so modify the 1104 reloc record a bit. 1105 1106 If we've relocated with a symbol with a section, change 1107 into a ref to the section belonging to the symbol. */ 1108 1109 reloc_entry->address += input_section->output_offset; 1110 1111 /* WTF?? */ 1112 if (abfd->xvec->flavour == bfd_target_coff_flavour 1113 && strcmp (abfd->xvec->name, "coff-Intel-little") != 0 1114 && strcmp (abfd->xvec->name, "coff-Intel-big") != 0) 1115 { 1116#if 1 1117/* For m68k-coff, the addend was being subtracted twice during 1118 relocation with -r. Removing the line below this comment 1119 fixes that problem; see PR 2953. 1120 1121However, Ian wrote the following, regarding removing the line below, 1122which explains why it is still enabled: --djm 1123 1124If you put a patch like that into BFD you need to check all the COFF 1125linkers. I am fairly certain that patch will break coff-i386 (e.g., 1126SCO); see coff_i386_reloc in coff-i386.c where I worked around the 1127problem in a different way. There may very well be a reason that the 1128code works as it does. 1129 1130Hmmm. The first obvious point is that bfd_install_relocation should 1131not have any tests that depend upon the flavour. It's seem like 1132entirely the wrong place for such a thing. The second obvious point 1133is that the current code ignores the reloc addend when producing 1134relocateable output for COFF. That's peculiar. In fact, I really 1135have no idea what the point of the line you want to remove is. 1136 1137A typical COFF reloc subtracts the old value of the symbol and adds in 1138the new value to the location in the object file (if it's a pc 1139relative reloc it adds the difference between the symbol value and the 1140location). When relocating we need to preserve that property. 1141 1142BFD handles this by setting the addend to the negative of the old 1143value of the symbol. Unfortunately it handles common symbols in a 1144non-standard way (it doesn't subtract the old value) but that's a 1145different story (we can't change it without losing backward 1146compatibility with old object files) (coff-i386 does subtract the old 1147value, to be compatible with existing coff-i386 targets, like SCO). 1148 1149So everything works fine when not producing relocateable output. When 1150we are producing relocateable output, logically we should do exactly 1151what we do when not producing relocateable output. Therefore, your 1152patch is correct. In fact, it should probably always just set 1153reloc_entry->addend to 0 for all cases, since it is, in fact, going to 1154add the value into the object file. This won't hurt the COFF code, 1155which doesn't use the addend; I'm not sure what it will do to other 1156formats (the thing to check for would be whether any formats both use 1157the addend and set partial_inplace). 1158 1159When I wanted to make coff-i386 produce relocateable output, I ran 1160into the problem that you are running into: I wanted to remove that 1161line. Rather than risk it, I made the coff-i386 relocs use a special 1162function; it's coff_i386_reloc in coff-i386.c. The function 1163specifically adds the addend field into the object file, knowing that 1164bfd_install_relocation is not going to. If you remove that line, then 1165coff-i386.c will wind up adding the addend field in twice. It's 1166trivial to fix; it just needs to be done. 1167 1168The problem with removing the line is just that it may break some 1169working code. With BFD it's hard to be sure of anything. The right 1170way to deal with this is simply to build and test at least all the 1171supported COFF targets. It should be straightforward if time and disk 1172space consuming. For each target: 1173 1) build the linker 1174 2) generate some executable, and link it using -r (I would 1175 probably use paranoia.o and link against newlib/libc.a, which 1176 for all the supported targets would be available in 1177 /usr/cygnus/progressive/H-host/target/lib/libc.a). 1178 3) make the change to reloc.c 1179 4) rebuild the linker 1180 5) repeat step 2 1181 6) if the resulting object files are the same, you have at least 1182 made it no worse 1183 7) if they are different you have to figure out which version is 1184 right 1185*/ 1186 relocation -= reloc_entry->addend; 1187#endif 1188 reloc_entry->addend = 0; 1189 } 1190 else 1191 { 1192 reloc_entry->addend = relocation; 1193 } 1194 } 1195 1196 /* FIXME: This overflow checking is incomplete, because the value 1197 might have overflowed before we get here. For a correct check we 1198 need to compute the value in a size larger than bitsize, but we 1199 can't reasonably do that for a reloc the same size as a host 1200 machine word. 1201 FIXME: We should also do overflow checking on the result after 1202 adding in the value contained in the object file. */ 1203 if (howto->complain_on_overflow != complain_overflow_dont) 1204 flag = bfd_check_overflow (howto->complain_on_overflow, 1205 howto->bitsize, 1206 howto->rightshift, 1207 bfd_arch_bits_per_address (abfd), 1208 relocation); 1209 1210 /* 1211 Either we are relocating all the way, or we don't want to apply 1212 the relocation to the reloc entry (probably because there isn't 1213 any room in the output format to describe addends to relocs) 1214 */ 1215 1216 /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler 1217 (OSF version 1.3, compiler version 3.11). It miscompiles the 1218 following program: 1219 1220 struct str 1221 { 1222 unsigned int i0; 1223 } s = { 0 }; 1224 1225 int 1226 main () 1227 { 1228 unsigned long x; 1229 1230 x = 0x100000000; 1231 x <<= (unsigned long) s.i0; 1232 if (x == 0) 1233 printf ("failed\n"); 1234 else 1235 printf ("succeeded (%lx)\n", x); 1236 } 1237 */ 1238 1239 relocation >>= (bfd_vma) howto->rightshift; 1240 1241 /* Shift everything up to where it's going to be used */ 1242 1243 relocation <<= (bfd_vma) howto->bitpos; 1244 1245 /* Wait for the day when all have the mask in them */ 1246 1247 /* What we do: 1248 i instruction to be left alone 1249 o offset within instruction 1250 r relocation offset to apply 1251 S src mask 1252 D dst mask 1253 N ~dst mask 1254 A part 1 1255 B part 2 1256 R result 1257 1258 Do this: 1259 (( i i i i i o o o o o from bfd_get<size> 1260 and S S S S S) to get the size offset we want 1261 + r r r r r r r r r r) to get the final value to place 1262 and D D D D D to chop to right size 1263 ----------------------- 1264 = A A A A A 1265 And this: 1266 ( i i i i i o o o o o from bfd_get<size> 1267 and N N N N N ) get instruction 1268 ----------------------- 1269 = B B B B B 1270 1271 And then: 1272 ( B B B B B 1273 or A A A A A) 1274 ----------------------- 1275 = R R R R R R R R R R put into bfd_put<size> 1276 */ 1277 1278#define DOIT(x) \ 1279 x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask)) 1280 1281 data = (bfd_byte *) data_start + (octets - data_start_offset); 1282 1283 switch (howto->size) 1284 { 1285 case 0: 1286 { 1287 char x = bfd_get_8 (abfd, (char *) data); 1288 DOIT (x); 1289 bfd_put_8 (abfd, x, (unsigned char *) data); 1290 } 1291 break; 1292 1293 case 1: 1294 { 1295 short x = bfd_get_16 (abfd, (bfd_byte *) data); 1296 DOIT (x); 1297 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data); 1298 } 1299 break; 1300 case 2: 1301 { 1302 long x = bfd_get_32 (abfd, (bfd_byte *) data); 1303 DOIT (x); 1304 bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data); 1305 } 1306 break; 1307 case -2: 1308 { 1309 long x = bfd_get_32 (abfd, (bfd_byte *) data); 1310 relocation = -relocation; 1311 DOIT (x); 1312 bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data); 1313 } 1314 break; 1315 1316 case 3: 1317 /* Do nothing */ 1318 break; 1319 1320 case 4: 1321 { 1322 bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data); 1323 DOIT (x); 1324 bfd_put_64 (abfd, x, (bfd_byte *) data); 1325 } 1326 break; 1327 default: 1328 return bfd_reloc_other; 1329 } 1330 1331 return flag; 1332} 1333 1334/* This relocation routine is used by some of the backend linkers. 1335 They do not construct asymbol or arelent structures, so there is no 1336 reason for them to use bfd_perform_relocation. Also, 1337 bfd_perform_relocation is so hacked up it is easier to write a new 1338 function than to try to deal with it. 1339 1340 This routine does a final relocation. Whether it is useful for a 1341 relocateable link depends upon how the object format defines 1342 relocations. 1343 1344 FIXME: This routine ignores any special_function in the HOWTO, 1345 since the existing special_function values have been written for 1346 bfd_perform_relocation. 1347 1348 HOWTO is the reloc howto information. 1349 INPUT_BFD is the BFD which the reloc applies to. 1350 INPUT_SECTION is the section which the reloc applies to. 1351 CONTENTS is the contents of the section. 1352 ADDRESS is the address of the reloc within INPUT_SECTION. 1353 VALUE is the value of the symbol the reloc refers to. 1354 ADDEND is the addend of the reloc. */ 1355 1356bfd_reloc_status_type 1357_bfd_final_link_relocate (howto, input_bfd, input_section, contents, address, 1358 value, addend) 1359 reloc_howto_type *howto; 1360 bfd *input_bfd; 1361 asection *input_section; 1362 bfd_byte *contents; 1363 bfd_vma address; 1364 bfd_vma value; 1365 bfd_vma addend; 1366{ 1367 bfd_vma relocation; 1368 1369 /* Sanity check the address. */ 1370 if (address > input_section->_raw_size) 1371 return bfd_reloc_outofrange; 1372 1373 /* This function assumes that we are dealing with a basic relocation 1374 against a symbol. We want to compute the value of the symbol to 1375 relocate to. This is just VALUE, the value of the symbol, plus 1376 ADDEND, any addend associated with the reloc. */ 1377 relocation = value + addend; 1378 1379 /* If the relocation is PC relative, we want to set RELOCATION to 1380 the distance between the symbol (currently in RELOCATION) and the 1381 location we are relocating. Some targets (e.g., i386-aout) 1382 arrange for the contents of the section to be the negative of the 1383 offset of the location within the section; for such targets 1384 pcrel_offset is false. Other targets (e.g., m88kbcs or ELF) 1385 simply leave the contents of the section as zero; for such 1386 targets pcrel_offset is true. If pcrel_offset is false we do not 1387 need to subtract out the offset of the location within the 1388 section (which is just ADDRESS). */ 1389 if (howto->pc_relative) 1390 { 1391 relocation -= (input_section->output_section->vma 1392 + input_section->output_offset); 1393 if (howto->pcrel_offset) 1394 relocation -= address; 1395 } 1396 1397 return _bfd_relocate_contents (howto, input_bfd, relocation, 1398 contents + address); 1399} 1400 1401/* Relocate a given location using a given value and howto. */ 1402 1403bfd_reloc_status_type 1404_bfd_relocate_contents (howto, input_bfd, relocation, location) 1405 reloc_howto_type *howto; 1406 bfd *input_bfd; 1407 bfd_vma relocation; 1408 bfd_byte *location; 1409{ 1410 int size; 1411 bfd_vma x = 0; 1412 bfd_reloc_status_type flag; 1413 unsigned int rightshift = howto->rightshift; 1414 unsigned int bitpos = howto->bitpos; 1415 1416 /* If the size is negative, negate RELOCATION. This isn't very 1417 general. */ 1418 if (howto->size < 0) 1419 relocation = -relocation; 1420 1421 /* Get the value we are going to relocate. */ 1422 size = bfd_get_reloc_size (howto); 1423 switch (size) 1424 { 1425 default: 1426 case 0: 1427 abort (); 1428 case 1: 1429 x = bfd_get_8 (input_bfd, location); 1430 break; 1431 case 2: 1432 x = bfd_get_16 (input_bfd, location); 1433 break; 1434 case 4: 1435 x = bfd_get_32 (input_bfd, location); 1436 break; 1437 case 8: 1438#ifdef BFD64 1439 x = bfd_get_64 (input_bfd, location); 1440#else 1441 abort (); 1442#endif 1443 break; 1444 } 1445 1446 /* Check for overflow. FIXME: We may drop bits during the addition 1447 which we don't check for. We must either check at every single 1448 operation, which would be tedious, or we must do the computations 1449 in a type larger than bfd_vma, which would be inefficient. */ 1450 flag = bfd_reloc_ok; 1451 if (howto->complain_on_overflow != complain_overflow_dont) 1452 { 1453 bfd_vma addrmask, fieldmask, signmask, ss; 1454 bfd_vma a, b, sum; 1455 1456 /* Get the values to be added together. For signed and unsigned 1457 relocations, we assume that all values should be truncated to 1458 the size of an address. For bitfields, all the bits matter. 1459 See also bfd_check_overflow. */ 1460 fieldmask = N_ONES (howto->bitsize); 1461 addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask; 1462 a = relocation; 1463 b = x & howto->src_mask; 1464 1465 switch (howto->complain_on_overflow) 1466 { 1467 case complain_overflow_signed: 1468 a = (a & addrmask) >> rightshift; 1469 1470 /* If any sign bits are set, all sign bits must be set. 1471 That is, A must be a valid negative address after 1472 shifting. */ 1473 signmask = ~ (fieldmask >> 1); 1474 ss = a & signmask; 1475 if (ss != 0 && ss != ((addrmask >> rightshift) & signmask)) 1476 flag = bfd_reloc_overflow; 1477 1478 /* We only need this next bit of code if the sign bit of B 1479 is below the sign bit of A. This would only happen if 1480 SRC_MASK had fewer bits than BITSIZE. Note that if 1481 SRC_MASK has more bits than BITSIZE, we can get into 1482 trouble; we would need to verify that B is in range, as 1483 we do for A above. */ 1484 signmask = ((~ howto->src_mask) >> 1) & howto->src_mask; 1485 1486 /* Set all the bits above the sign bit. */ 1487 b = (b ^ signmask) - signmask; 1488 1489 b = (b & addrmask) >> bitpos; 1490 1491 /* Now we can do the addition. */ 1492 sum = a + b; 1493 1494 /* See if the result has the correct sign. Bits above the 1495 sign bit are junk now; ignore them. If the sum is 1496 positive, make sure we did not have all negative inputs; 1497 if the sum is negative, make sure we did not have all 1498 positive inputs. The test below looks only at the sign 1499 bits, and it really just 1500 SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM) 1501 */ 1502 signmask = (fieldmask >> 1) + 1; 1503 if (((~ (a ^ b)) & (a ^ sum)) & signmask) 1504 flag = bfd_reloc_overflow; 1505 1506 break; 1507 1508 case complain_overflow_unsigned: 1509 /* Checking for an unsigned overflow is relatively easy: 1510 trim the addresses and add, and trim the result as well. 1511 Overflow is normally indicated when the result does not 1512 fit in the field. However, we also need to consider the 1513 case when, e.g., fieldmask is 0x7fffffff or smaller, an 1514 input is 0x80000000, and bfd_vma is only 32 bits; then we 1515 will get sum == 0, but there is an overflow, since the 1516 inputs did not fit in the field. Instead of doing a 1517 separate test, we can check for this by or-ing in the 1518 operands when testing for the sum overflowing its final 1519 field. */ 1520 a = (a & addrmask) >> rightshift; 1521 b = (b & addrmask) >> bitpos; 1522 sum = (a + b) & addrmask; 1523 if ((a | b | sum) & ~ fieldmask) 1524 flag = bfd_reloc_overflow; 1525 1526 break; 1527 1528 case complain_overflow_bitfield: 1529 /* Much like the signed check, but for a field one bit 1530 wider, and no trimming inputs with addrmask. We allow a 1531 bitfield to represent numbers in the range -2**n to 1532 2**n-1, where n is the number of bits in the field. 1533 Note that when bfd_vma is 32 bits, a 32-bit reloc can't 1534 overflow, which is exactly what we want. */ 1535 a >>= rightshift; 1536 1537 signmask = ~ fieldmask; 1538 ss = a & signmask; 1539 if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & signmask)) 1540 flag = bfd_reloc_overflow; 1541 1542 signmask = ((~ howto->src_mask) >> 1) & howto->src_mask; 1543 b = (b ^ signmask) - signmask; 1544 1545 b >>= bitpos; 1546 1547 sum = a + b; 1548 1549 /* We mask with addrmask here to explicitly allow an address 1550 wrap-around. The Linux kernel relies on it, and it is 1551 the only way to write assembler code which can run when 1552 loaded at a location 0x80000000 away from the location at 1553 which it is linked. */ 1554 signmask = fieldmask + 1; 1555 if (((~ (a ^ b)) & (a ^ sum)) & signmask & addrmask) 1556 flag = bfd_reloc_overflow; 1557 1558 break; 1559 1560 default: 1561 abort (); 1562 } 1563 } 1564 1565 /* Put RELOCATION in the right bits. */ 1566 relocation >>= (bfd_vma) rightshift; 1567 relocation <<= (bfd_vma) bitpos; 1568 1569 /* Add RELOCATION to the right bits of X. */ 1570 x = ((x & ~howto->dst_mask) 1571 | (((x & howto->src_mask) + relocation) & howto->dst_mask)); 1572 1573 /* Put the relocated value back in the object file. */ 1574 switch (size) 1575 { 1576 default: 1577 case 0: 1578 abort (); 1579 case 1: 1580 bfd_put_8 (input_bfd, x, location); 1581 break; 1582 case 2: 1583 bfd_put_16 (input_bfd, x, location); 1584 break; 1585 case 4: 1586 bfd_put_32 (input_bfd, x, location); 1587 break; 1588 case 8: 1589#ifdef BFD64 1590 bfd_put_64 (input_bfd, x, location); 1591#else 1592 abort (); 1593#endif 1594 break; 1595 } 1596 1597 return flag; 1598} 1599 1600/* 1601DOCDD 1602INODE 1603 howto manager, , typedef arelent, Relocations 1604 1605SECTION 1606 The howto manager 1607 1608 When an application wants to create a relocation, but doesn't 1609 know what the target machine might call it, it can find out by 1610 using this bit of code. 1611 1612*/ 1613 1614/* 1615TYPEDEF 1616 bfd_reloc_code_type 1617 1618DESCRIPTION 1619 The insides of a reloc code. The idea is that, eventually, there 1620 will be one enumerator for every type of relocation we ever do. 1621 Pass one of these values to <<bfd_reloc_type_lookup>>, and it'll 1622 return a howto pointer. 1623 1624 This does mean that the application must determine the correct 1625 enumerator value; you can't get a howto pointer from a random set 1626 of attributes. 1627 1628SENUM 1629 bfd_reloc_code_real 1630 1631ENUM 1632 BFD_RELOC_64 1633ENUMX 1634 BFD_RELOC_32 1635ENUMX 1636 BFD_RELOC_26 1637ENUMX 1638 BFD_RELOC_24 1639ENUMX 1640 BFD_RELOC_16 1641ENUMX 1642 BFD_RELOC_14 1643ENUMX 1644 BFD_RELOC_8 1645ENUMDOC 1646 Basic absolute relocations of N bits. 1647 1648ENUM 1649 BFD_RELOC_64_PCREL 1650ENUMX 1651 BFD_RELOC_32_PCREL 1652ENUMX 1653 BFD_RELOC_24_PCREL 1654ENUMX 1655 BFD_RELOC_16_PCREL 1656ENUMX 1657 BFD_RELOC_12_PCREL 1658ENUMX 1659 BFD_RELOC_8_PCREL 1660ENUMDOC 1661 PC-relative relocations. Sometimes these are relative to the address 1662of the relocation itself; sometimes they are relative to the start of 1663the section containing the relocation. It depends on the specific target. 1664 1665The 24-bit relocation is used in some Intel 960 configurations. 1666 1667ENUM 1668 BFD_RELOC_32_GOT_PCREL 1669ENUMX 1670 BFD_RELOC_16_GOT_PCREL 1671ENUMX 1672 BFD_RELOC_8_GOT_PCREL 1673ENUMX 1674 BFD_RELOC_32_GOTOFF 1675ENUMX 1676 BFD_RELOC_16_GOTOFF 1677ENUMX 1678 BFD_RELOC_LO16_GOTOFF 1679ENUMX 1680 BFD_RELOC_HI16_GOTOFF 1681ENUMX 1682 BFD_RELOC_HI16_S_GOTOFF 1683ENUMX 1684 BFD_RELOC_8_GOTOFF 1685ENUMX 1686 BFD_RELOC_64_PLT_PCREL 1687ENUMX 1688 BFD_RELOC_32_PLT_PCREL 1689ENUMX 1690 BFD_RELOC_24_PLT_PCREL 1691ENUMX 1692 BFD_RELOC_16_PLT_PCREL 1693ENUMX 1694 BFD_RELOC_8_PLT_PCREL 1695ENUMX 1696 BFD_RELOC_64_PLTOFF 1697ENUMX 1698 BFD_RELOC_32_PLTOFF 1699ENUMX 1700 BFD_RELOC_16_PLTOFF 1701ENUMX 1702 BFD_RELOC_LO16_PLTOFF 1703ENUMX 1704 BFD_RELOC_HI16_PLTOFF 1705ENUMX 1706 BFD_RELOC_HI16_S_PLTOFF 1707ENUMX 1708 BFD_RELOC_8_PLTOFF 1709ENUMDOC 1710 For ELF. 1711 1712ENUM 1713 BFD_RELOC_68K_GLOB_DAT 1714ENUMX 1715 BFD_RELOC_68K_JMP_SLOT 1716ENUMX 1717 BFD_RELOC_68K_RELATIVE 1718ENUMDOC 1719 Relocations used by 68K ELF. 1720 1721ENUM 1722 BFD_RELOC_32_BASEREL 1723ENUMX 1724 BFD_RELOC_16_BASEREL 1725ENUMX 1726 BFD_RELOC_LO16_BASEREL 1727ENUMX 1728 BFD_RELOC_HI16_BASEREL 1729ENUMX 1730 BFD_RELOC_HI16_S_BASEREL 1731ENUMX 1732 BFD_RELOC_8_BASEREL 1733ENUMX 1734 BFD_RELOC_RVA 1735ENUMDOC 1736 Linkage-table relative. 1737 1738ENUM 1739 BFD_RELOC_8_FFnn 1740ENUMDOC 1741 Absolute 8-bit relocation, but used to form an address like 0xFFnn. 1742 1743ENUM 1744 BFD_RELOC_32_PCREL_S2 1745ENUMX 1746 BFD_RELOC_16_PCREL_S2 1747ENUMX 1748 BFD_RELOC_23_PCREL_S2 1749ENUMDOC 1750 These PC-relative relocations are stored as word displacements -- 1751i.e., byte displacements shifted right two bits. The 30-bit word 1752displacement (<<32_PCREL_S2>> -- 32 bits, shifted 2) is used on the 1753SPARC. (SPARC tools generally refer to this as <<WDISP30>>.) The 1754signed 16-bit displacement is used on the MIPS, and the 23-bit 1755displacement is used on the Alpha. 1756 1757ENUM 1758 BFD_RELOC_HI22 1759ENUMX 1760 BFD_RELOC_LO10 1761ENUMDOC 1762 High 22 bits and low 10 bits of 32-bit value, placed into lower bits of 1763the target word. These are used on the SPARC. 1764 1765ENUM 1766 BFD_RELOC_GPREL16 1767ENUMX 1768 BFD_RELOC_GPREL32 1769ENUMDOC 1770 For systems that allocate a Global Pointer register, these are 1771displacements off that register. These relocation types are 1772handled specially, because the value the register will have is 1773decided relatively late. 1774 1775ENUM 1776 BFD_RELOC_I960_CALLJ 1777ENUMDOC 1778 Reloc types used for i960/b.out. 1779 1780ENUM 1781 BFD_RELOC_NONE 1782ENUMX 1783 BFD_RELOC_SPARC_WDISP22 1784ENUMX 1785 BFD_RELOC_SPARC22 1786ENUMX 1787 BFD_RELOC_SPARC13 1788ENUMX 1789 BFD_RELOC_SPARC_GOT10 1790ENUMX 1791 BFD_RELOC_SPARC_GOT13 1792ENUMX 1793 BFD_RELOC_SPARC_GOT22 1794ENUMX 1795 BFD_RELOC_SPARC_PC10 1796ENUMX 1797 BFD_RELOC_SPARC_PC22 1798ENUMX 1799 BFD_RELOC_SPARC_WPLT30 1800ENUMX 1801 BFD_RELOC_SPARC_COPY 1802ENUMX 1803 BFD_RELOC_SPARC_GLOB_DAT 1804ENUMX 1805 BFD_RELOC_SPARC_JMP_SLOT 1806ENUMX 1807 BFD_RELOC_SPARC_RELATIVE 1808ENUMX 1809 BFD_RELOC_SPARC_UA16 1810ENUMX 1811 BFD_RELOC_SPARC_UA32 1812ENUMX 1813 BFD_RELOC_SPARC_UA64 1814ENUMDOC 1815 SPARC ELF relocations. There is probably some overlap with other 1816 relocation types already defined. 1817 1818ENUM 1819 BFD_RELOC_SPARC_BASE13 1820ENUMX 1821 BFD_RELOC_SPARC_BASE22 1822ENUMDOC 1823 I think these are specific to SPARC a.out (e.g., Sun 4). 1824 1825ENUMEQ 1826 BFD_RELOC_SPARC_64 1827 BFD_RELOC_64 1828ENUMX 1829 BFD_RELOC_SPARC_10 1830ENUMX 1831 BFD_RELOC_SPARC_11 1832ENUMX 1833 BFD_RELOC_SPARC_OLO10 1834ENUMX 1835 BFD_RELOC_SPARC_HH22 1836ENUMX 1837 BFD_RELOC_SPARC_HM10 1838ENUMX 1839 BFD_RELOC_SPARC_LM22 1840ENUMX 1841 BFD_RELOC_SPARC_PC_HH22 1842ENUMX 1843 BFD_RELOC_SPARC_PC_HM10 1844ENUMX 1845 BFD_RELOC_SPARC_PC_LM22 1846ENUMX 1847 BFD_RELOC_SPARC_WDISP16 1848ENUMX 1849 BFD_RELOC_SPARC_WDISP19 1850ENUMX 1851 BFD_RELOC_SPARC_7 1852ENUMX 1853 BFD_RELOC_SPARC_6 1854ENUMX 1855 BFD_RELOC_SPARC_5 1856ENUMEQX 1857 BFD_RELOC_SPARC_DISP64 1858 BFD_RELOC_64_PCREL 1859ENUMX 1860 BFD_RELOC_SPARC_PLT32 1861ENUMX 1862 BFD_RELOC_SPARC_PLT64 1863ENUMX 1864 BFD_RELOC_SPARC_HIX22 1865ENUMX 1866 BFD_RELOC_SPARC_LOX10 1867ENUMX 1868 BFD_RELOC_SPARC_H44 1869ENUMX 1870 BFD_RELOC_SPARC_M44 1871ENUMX 1872 BFD_RELOC_SPARC_L44 1873ENUMX 1874 BFD_RELOC_SPARC_REGISTER 1875ENUMDOC 1876 SPARC64 relocations 1877 1878ENUM 1879 BFD_RELOC_SPARC_REV32 1880ENUMDOC 1881 SPARC little endian relocation 1882 1883ENUM 1884 BFD_RELOC_ALPHA_GPDISP_HI16 1885ENUMDOC 1886 Alpha ECOFF and ELF relocations. Some of these treat the symbol or 1887 "addend" in some special way. 1888 For GPDISP_HI16 ("gpdisp") relocations, the symbol is ignored when 1889 writing; when reading, it will be the absolute section symbol. The 1890 addend is the displacement in bytes of the "lda" instruction from 1891 the "ldah" instruction (which is at the address of this reloc). 1892ENUM 1893 BFD_RELOC_ALPHA_GPDISP_LO16 1894ENUMDOC 1895 For GPDISP_LO16 ("ignore") relocations, the symbol is handled as 1896 with GPDISP_HI16 relocs. The addend is ignored when writing the 1897 relocations out, and is filled in with the file's GP value on 1898 reading, for convenience. 1899 1900ENUM 1901 BFD_RELOC_ALPHA_GPDISP 1902ENUMDOC 1903 The ELF GPDISP relocation is exactly the same as the GPDISP_HI16 1904 relocation except that there is no accompanying GPDISP_LO16 1905 relocation. 1906 1907ENUM 1908 BFD_RELOC_ALPHA_LITERAL 1909ENUMX 1910 BFD_RELOC_ALPHA_ELF_LITERAL 1911ENUMX 1912 BFD_RELOC_ALPHA_LITUSE 1913ENUMDOC 1914 The Alpha LITERAL/LITUSE relocs are produced by a symbol reference; 1915 the assembler turns it into a LDQ instruction to load the address of 1916 the symbol, and then fills in a register in the real instruction. 1917 1918 The LITERAL reloc, at the LDQ instruction, refers to the .lita 1919 section symbol. The addend is ignored when writing, but is filled 1920 in with the file's GP value on reading, for convenience, as with the 1921 GPDISP_LO16 reloc. 1922 1923 The ELF_LITERAL reloc is somewhere between 16_GOTOFF and GPDISP_LO16. 1924 It should refer to the symbol to be referenced, as with 16_GOTOFF, 1925 but it generates output not based on the position within the .got 1926 section, but relative to the GP value chosen for the file during the 1927 final link stage. 1928 1929 The LITUSE reloc, on the instruction using the loaded address, gives 1930 information to the linker that it might be able to use to optimize 1931 away some literal section references. The symbol is ignored (read 1932 as the absolute section symbol), and the "addend" indicates the type 1933 of instruction using the register: 1934 1 - "memory" fmt insn 1935 2 - byte-manipulation (byte offset reg) 1936 3 - jsr (target of branch) 1937 1938ENUM 1939 BFD_RELOC_ALPHA_HINT 1940ENUMDOC 1941 The HINT relocation indicates a value that should be filled into the 1942 "hint" field of a jmp/jsr/ret instruction, for possible branch- 1943 prediction logic which may be provided on some processors. 1944 1945ENUM 1946 BFD_RELOC_ALPHA_LINKAGE 1947ENUMDOC 1948 The LINKAGE relocation outputs a linkage pair in the object file, 1949 which is filled by the linker. 1950 1951ENUM 1952 BFD_RELOC_ALPHA_CODEADDR 1953ENUMDOC 1954 The CODEADDR relocation outputs a STO_CA in the object file, 1955 which is filled by the linker. 1956 1957ENUM 1958 BFD_RELOC_ALPHA_GPREL_HI16 1959ENUMX 1960 BFD_RELOC_ALPHA_GPREL_LO16 1961ENUMDOC 1962 The GPREL_HI/LO relocations together form a 32-bit offset from the 1963 GP register. 1964 1965ENUM 1966 BFD_RELOC_MIPS_JMP 1967ENUMDOC 1968 Bits 27..2 of the relocation address shifted right 2 bits; 1969 simple reloc otherwise. 1970 1971ENUM 1972 BFD_RELOC_MIPS16_JMP 1973ENUMDOC 1974 The MIPS16 jump instruction. 1975 1976ENUM 1977 BFD_RELOC_MIPS16_GPREL 1978ENUMDOC 1979 MIPS16 GP relative reloc. 1980 1981ENUM 1982 BFD_RELOC_HI16 1983ENUMDOC 1984 High 16 bits of 32-bit value; simple reloc. 1985ENUM 1986 BFD_RELOC_HI16_S 1987ENUMDOC 1988 High 16 bits of 32-bit value but the low 16 bits will be sign 1989 extended and added to form the final result. If the low 16 1990 bits form a negative number, we need to add one to the high value 1991 to compensate for the borrow when the low bits are added. 1992ENUM 1993 BFD_RELOC_LO16 1994ENUMDOC 1995 Low 16 bits. 1996ENUM 1997 BFD_RELOC_PCREL_HI16_S 1998ENUMDOC 1999 Like BFD_RELOC_HI16_S, but PC relative. 2000ENUM 2001 BFD_RELOC_PCREL_LO16 2002ENUMDOC 2003 Like BFD_RELOC_LO16, but PC relative. 2004 2005ENUM 2006 BFD_RELOC_MIPS_LITERAL 2007ENUMDOC 2008 Relocation against a MIPS literal section. 2009 2010ENUM 2011 BFD_RELOC_MIPS_GOT16 2012ENUMX 2013 BFD_RELOC_MIPS_CALL16 2014ENUMX 2015 BFD_RELOC_MIPS_GOT_HI16 2016ENUMX 2017 BFD_RELOC_MIPS_GOT_LO16 2018ENUMX 2019 BFD_RELOC_MIPS_CALL_HI16 2020ENUMX 2021 BFD_RELOC_MIPS_CALL_LO16 2022ENUMX 2023 BFD_RELOC_MIPS_SUB 2024ENUMX 2025 BFD_RELOC_MIPS_GOT_PAGE 2026ENUMX 2027 BFD_RELOC_MIPS_GOT_OFST 2028ENUMX 2029 BFD_RELOC_MIPS_GOT_DISP 2030ENUMX 2031 BFD_RELOC_MIPS_SHIFT5 2032ENUMX 2033 BFD_RELOC_MIPS_SHIFT6 2034ENUMX 2035 BFD_RELOC_MIPS_INSERT_A 2036ENUMX 2037 BFD_RELOC_MIPS_INSERT_B 2038ENUMX 2039 BFD_RELOC_MIPS_DELETE 2040ENUMX 2041 BFD_RELOC_MIPS_HIGHEST 2042ENUMX 2043 BFD_RELOC_MIPS_HIGHER 2044ENUMX 2045 BFD_RELOC_MIPS_SCN_DISP 2046ENUMX 2047 BFD_RELOC_MIPS_REL16 2048ENUMX 2049 BFD_RELOC_MIPS_RELGOT 2050ENUMX 2051 BFD_RELOC_MIPS_JALR 2052COMMENT 2053ENUMDOC 2054 MIPS ELF relocations. 2055 2056COMMENT 2057 2058ENUM 2059 BFD_RELOC_386_GOT32 2060ENUMX 2061 BFD_RELOC_386_PLT32 2062ENUMX 2063 BFD_RELOC_386_COPY 2064ENUMX 2065 BFD_RELOC_386_GLOB_DAT 2066ENUMX 2067 BFD_RELOC_386_JUMP_SLOT 2068ENUMX 2069 BFD_RELOC_386_RELATIVE 2070ENUMX 2071 BFD_RELOC_386_GOTOFF 2072ENUMX 2073 BFD_RELOC_386_GOTPC 2074ENUMDOC 2075 i386/elf relocations 2076 2077ENUM 2078 BFD_RELOC_X86_64_GOT32 2079ENUMX 2080 BFD_RELOC_X86_64_PLT32 2081ENUMX 2082 BFD_RELOC_X86_64_COPY 2083ENUMX 2084 BFD_RELOC_X86_64_GLOB_DAT 2085ENUMX 2086 BFD_RELOC_X86_64_JUMP_SLOT 2087ENUMX 2088 BFD_RELOC_X86_64_RELATIVE 2089ENUMX 2090 BFD_RELOC_X86_64_GOTPCREL 2091ENUMX 2092 BFD_RELOC_X86_64_32S 2093ENUMDOC 2094 x86-64/elf relocations 2095 2096ENUM 2097 BFD_RELOC_NS32K_IMM_8 2098ENUMX 2099 BFD_RELOC_NS32K_IMM_16 2100ENUMX 2101 BFD_RELOC_NS32K_IMM_32 2102ENUMX 2103 BFD_RELOC_NS32K_IMM_8_PCREL 2104ENUMX 2105 BFD_RELOC_NS32K_IMM_16_PCREL 2106ENUMX 2107 BFD_RELOC_NS32K_IMM_32_PCREL 2108ENUMX 2109 BFD_RELOC_NS32K_DISP_8 2110ENUMX 2111 BFD_RELOC_NS32K_DISP_16 2112ENUMX 2113 BFD_RELOC_NS32K_DISP_32 2114ENUMX 2115 BFD_RELOC_NS32K_DISP_8_PCREL 2116ENUMX 2117 BFD_RELOC_NS32K_DISP_16_PCREL 2118ENUMX 2119 BFD_RELOC_NS32K_DISP_32_PCREL 2120ENUMDOC 2121 ns32k relocations 2122 2123ENUM 2124 BFD_RELOC_PDP11_DISP_8_PCREL 2125ENUMX 2126 BFD_RELOC_PDP11_DISP_6_PCREL 2127ENUMDOC 2128 PDP11 relocations 2129 2130ENUM 2131 BFD_RELOC_PJ_CODE_HI16 2132ENUMX 2133 BFD_RELOC_PJ_CODE_LO16 2134ENUMX 2135 BFD_RELOC_PJ_CODE_DIR16 2136ENUMX 2137 BFD_RELOC_PJ_CODE_DIR32 2138ENUMX 2139 BFD_RELOC_PJ_CODE_REL16 2140ENUMX 2141 BFD_RELOC_PJ_CODE_REL32 2142ENUMDOC 2143 Picojava relocs. Not all of these appear in object files. 2144 2145ENUM 2146 BFD_RELOC_PPC_B26 2147ENUMX 2148 BFD_RELOC_PPC_BA26 2149ENUMX 2150 BFD_RELOC_PPC_TOC16 2151ENUMX 2152 BFD_RELOC_PPC_B16 2153ENUMX 2154 BFD_RELOC_PPC_B16_BRTAKEN 2155ENUMX 2156 BFD_RELOC_PPC_B16_BRNTAKEN 2157ENUMX 2158 BFD_RELOC_PPC_BA16 2159ENUMX 2160 BFD_RELOC_PPC_BA16_BRTAKEN 2161ENUMX 2162 BFD_RELOC_PPC_BA16_BRNTAKEN 2163ENUMX 2164 BFD_RELOC_PPC_COPY 2165ENUMX 2166 BFD_RELOC_PPC_GLOB_DAT 2167ENUMX 2168 BFD_RELOC_PPC_JMP_SLOT 2169ENUMX 2170 BFD_RELOC_PPC_RELATIVE 2171ENUMX 2172 BFD_RELOC_PPC_LOCAL24PC 2173ENUMX 2174 BFD_RELOC_PPC_EMB_NADDR32 2175ENUMX 2176 BFD_RELOC_PPC_EMB_NADDR16 2177ENUMX 2178 BFD_RELOC_PPC_EMB_NADDR16_LO 2179ENUMX 2180 BFD_RELOC_PPC_EMB_NADDR16_HI 2181ENUMX 2182 BFD_RELOC_PPC_EMB_NADDR16_HA 2183ENUMX 2184 BFD_RELOC_PPC_EMB_SDAI16 2185ENUMX 2186 BFD_RELOC_PPC_EMB_SDA2I16 2187ENUMX 2188 BFD_RELOC_PPC_EMB_SDA2REL 2189ENUMX 2190 BFD_RELOC_PPC_EMB_SDA21 2191ENUMX 2192 BFD_RELOC_PPC_EMB_MRKREF 2193ENUMX 2194 BFD_RELOC_PPC_EMB_RELSEC16 2195ENUMX 2196 BFD_RELOC_PPC_EMB_RELST_LO 2197ENUMX 2198 BFD_RELOC_PPC_EMB_RELST_HI 2199ENUMX 2200 BFD_RELOC_PPC_EMB_RELST_HA 2201ENUMX 2202 BFD_RELOC_PPC_EMB_BIT_FLD 2203ENUMX 2204 BFD_RELOC_PPC_EMB_RELSDA 2205ENUMX 2206 BFD_RELOC_PPC64_HIGHER 2207ENUMX 2208 BFD_RELOC_PPC64_HIGHER_S 2209ENUMX 2210 BFD_RELOC_PPC64_HIGHEST 2211ENUMX 2212 BFD_RELOC_PPC64_HIGHEST_S 2213ENUMX 2214 BFD_RELOC_PPC64_TOC16_LO 2215ENUMX 2216 BFD_RELOC_PPC64_TOC16_HI 2217ENUMX 2218 BFD_RELOC_PPC64_TOC16_HA 2219ENUMX 2220 BFD_RELOC_PPC64_TOC 2221ENUMX 2222 BFD_RELOC_PPC64_PLTGOT16 2223ENUMX 2224 BFD_RELOC_PPC64_PLTGOT16_LO 2225ENUMX 2226 BFD_RELOC_PPC64_PLTGOT16_HI 2227ENUMX 2228 BFD_RELOC_PPC64_PLTGOT16_HA 2229ENUMX 2230 BFD_RELOC_PPC64_ADDR16_DS 2231ENUMX 2232 BFD_RELOC_PPC64_ADDR16_LO_DS 2233ENUMX 2234 BFD_RELOC_PPC64_GOT16_DS 2235ENUMX 2236 BFD_RELOC_PPC64_GOT16_LO_DS 2237ENUMX 2238 BFD_RELOC_PPC64_PLT16_LO_DS 2239ENUMX 2240 BFD_RELOC_PPC64_SECTOFF_DS 2241ENUMX 2242 BFD_RELOC_PPC64_SECTOFF_LO_DS 2243ENUMX 2244 BFD_RELOC_PPC64_TOC16_DS 2245ENUMX 2246 BFD_RELOC_PPC64_TOC16_LO_DS 2247ENUMX 2248 BFD_RELOC_PPC64_PLTGOT16_DS 2249ENUMX 2250 BFD_RELOC_PPC64_PLTGOT16_LO_DS 2251ENUMDOC 2252 Power(rs6000) and PowerPC relocations. 2253 2254ENUM 2255 BFD_RELOC_I370_D12 2256ENUMDOC 2257 IBM 370/390 relocations 2258 2259ENUM 2260 BFD_RELOC_CTOR 2261ENUMDOC 2262 The type of reloc used to build a contructor table - at the moment 2263 probably a 32 bit wide absolute relocation, but the target can choose. 2264 It generally does map to one of the other relocation types. 2265 2266ENUM 2267 BFD_RELOC_ARM_PCREL_BRANCH 2268ENUMDOC 2269 ARM 26 bit pc-relative branch. The lowest two bits must be zero and are 2270 not stored in the instruction. 2271ENUM 2272 BFD_RELOC_ARM_PCREL_BLX 2273ENUMDOC 2274 ARM 26 bit pc-relative branch. The lowest bit must be zero and is 2275 not stored in the instruction. The 2nd lowest bit comes from a 1 bit 2276 field in the instruction. 2277ENUM 2278 BFD_RELOC_THUMB_PCREL_BLX 2279ENUMDOC 2280 Thumb 22 bit pc-relative branch. The lowest bit must be zero and is 2281 not stored in the instruction. The 2nd lowest bit comes from a 1 bit 2282 field in the instruction. 2283ENUM 2284 BFD_RELOC_ARM_IMMEDIATE 2285ENUMX 2286 BFD_RELOC_ARM_ADRL_IMMEDIATE 2287ENUMX 2288 BFD_RELOC_ARM_OFFSET_IMM 2289ENUMX 2290 BFD_RELOC_ARM_SHIFT_IMM 2291ENUMX 2292 BFD_RELOC_ARM_SWI 2293ENUMX 2294 BFD_RELOC_ARM_MULTI 2295ENUMX 2296 BFD_RELOC_ARM_CP_OFF_IMM 2297ENUMX 2298 BFD_RELOC_ARM_ADR_IMM 2299ENUMX 2300 BFD_RELOC_ARM_LDR_IMM 2301ENUMX 2302 BFD_RELOC_ARM_LITERAL 2303ENUMX 2304 BFD_RELOC_ARM_IN_POOL 2305ENUMX 2306 BFD_RELOC_ARM_OFFSET_IMM8 2307ENUMX 2308 BFD_RELOC_ARM_HWLITERAL 2309ENUMX 2310 BFD_RELOC_ARM_THUMB_ADD 2311ENUMX 2312 BFD_RELOC_ARM_THUMB_IMM 2313ENUMX 2314 BFD_RELOC_ARM_THUMB_SHIFT 2315ENUMX 2316 BFD_RELOC_ARM_THUMB_OFFSET 2317ENUMX 2318 BFD_RELOC_ARM_GOT12 2319ENUMX 2320 BFD_RELOC_ARM_GOT32 2321ENUMX 2322 BFD_RELOC_ARM_JUMP_SLOT 2323ENUMX 2324 BFD_RELOC_ARM_COPY 2325ENUMX 2326 BFD_RELOC_ARM_GLOB_DAT 2327ENUMX 2328 BFD_RELOC_ARM_PLT32 2329ENUMX 2330 BFD_RELOC_ARM_RELATIVE 2331ENUMX 2332 BFD_RELOC_ARM_GOTOFF 2333ENUMX 2334 BFD_RELOC_ARM_GOTPC 2335ENUMDOC 2336 These relocs are only used within the ARM assembler. They are not 2337 (at present) written to any object files. 2338 2339ENUM 2340 BFD_RELOC_SH_PCDISP8BY2 2341ENUMX 2342 BFD_RELOC_SH_PCDISP12BY2 2343ENUMX 2344 BFD_RELOC_SH_IMM4 2345ENUMX 2346 BFD_RELOC_SH_IMM4BY2 2347ENUMX 2348 BFD_RELOC_SH_IMM4BY4 2349ENUMX 2350 BFD_RELOC_SH_IMM8 2351ENUMX 2352 BFD_RELOC_SH_IMM8BY2 2353ENUMX 2354 BFD_RELOC_SH_IMM8BY4 2355ENUMX 2356 BFD_RELOC_SH_PCRELIMM8BY2 2357ENUMX 2358 BFD_RELOC_SH_PCRELIMM8BY4 2359ENUMX 2360 BFD_RELOC_SH_SWITCH16 2361ENUMX 2362 BFD_RELOC_SH_SWITCH32 2363ENUMX 2364 BFD_RELOC_SH_USES 2365ENUMX 2366 BFD_RELOC_SH_COUNT 2367ENUMX 2368 BFD_RELOC_SH_ALIGN 2369ENUMX 2370 BFD_RELOC_SH_CODE 2371ENUMX 2372 BFD_RELOC_SH_DATA 2373ENUMX 2374 BFD_RELOC_SH_LABEL 2375ENUMX 2376 BFD_RELOC_SH_LOOP_START 2377ENUMX 2378 BFD_RELOC_SH_LOOP_END 2379ENUMX 2380 BFD_RELOC_SH_COPY 2381ENUMX 2382 BFD_RELOC_SH_GLOB_DAT 2383ENUMX 2384 BFD_RELOC_SH_JMP_SLOT 2385ENUMX 2386 BFD_RELOC_SH_RELATIVE 2387ENUMX 2388 BFD_RELOC_SH_GOTPC 2389ENUMDOC 2390 Hitachi SH relocs. Not all of these appear in object files. 2391 2392ENUM 2393 BFD_RELOC_THUMB_PCREL_BRANCH9 2394ENUMX 2395 BFD_RELOC_THUMB_PCREL_BRANCH12 2396ENUMX 2397 BFD_RELOC_THUMB_PCREL_BRANCH23 2398ENUMDOC 2399 Thumb 23-, 12- and 9-bit pc-relative branches. The lowest bit must 2400 be zero and is not stored in the instruction. 2401 2402ENUM 2403 BFD_RELOC_ARC_B22_PCREL 2404ENUMDOC 2405 ARC Cores relocs. 2406 ARC 22 bit pc-relative branch. The lowest two bits must be zero and are 2407 not stored in the instruction. The high 20 bits are installed in bits 26 2408 through 7 of the instruction. 2409ENUM 2410 BFD_RELOC_ARC_B26 2411ENUMDOC 2412 ARC 26 bit absolute branch. The lowest two bits must be zero and are not 2413 stored in the instruction. The high 24 bits are installed in bits 23 2414 through 0. 2415 2416ENUM 2417 BFD_RELOC_D10V_10_PCREL_R 2418ENUMDOC 2419 Mitsubishi D10V relocs. 2420 This is a 10-bit reloc with the right 2 bits 2421 assumed to be 0. 2422ENUM 2423 BFD_RELOC_D10V_10_PCREL_L 2424ENUMDOC 2425 Mitsubishi D10V relocs. 2426 This is a 10-bit reloc with the right 2 bits 2427 assumed to be 0. This is the same as the previous reloc 2428 except it is in the left container, i.e., 2429 shifted left 15 bits. 2430ENUM 2431 BFD_RELOC_D10V_18 2432ENUMDOC 2433 This is an 18-bit reloc with the right 2 bits 2434 assumed to be 0. 2435ENUM 2436 BFD_RELOC_D10V_18_PCREL 2437ENUMDOC 2438 This is an 18-bit reloc with the right 2 bits 2439 assumed to be 0. 2440 2441ENUM 2442 BFD_RELOC_D30V_6 2443ENUMDOC 2444 Mitsubishi D30V relocs. 2445 This is a 6-bit absolute reloc. 2446ENUM 2447 BFD_RELOC_D30V_9_PCREL 2448ENUMDOC 2449 This is a 6-bit pc-relative reloc with 2450 the right 3 bits assumed to be 0. 2451ENUM 2452 BFD_RELOC_D30V_9_PCREL_R 2453ENUMDOC 2454 This is a 6-bit pc-relative reloc with 2455 the right 3 bits assumed to be 0. Same 2456 as the previous reloc but on the right side 2457 of the container. 2458ENUM 2459 BFD_RELOC_D30V_15 2460ENUMDOC 2461 This is a 12-bit absolute reloc with the 2462 right 3 bitsassumed to be 0. 2463ENUM 2464 BFD_RELOC_D30V_15_PCREL 2465ENUMDOC 2466 This is a 12-bit pc-relative reloc with 2467 the right 3 bits assumed to be 0. 2468ENUM 2469 BFD_RELOC_D30V_15_PCREL_R 2470ENUMDOC 2471 This is a 12-bit pc-relative reloc with 2472 the right 3 bits assumed to be 0. Same 2473 as the previous reloc but on the right side 2474 of the container. 2475ENUM 2476 BFD_RELOC_D30V_21 2477ENUMDOC 2478 This is an 18-bit absolute reloc with 2479 the right 3 bits assumed to be 0. 2480ENUM 2481 BFD_RELOC_D30V_21_PCREL 2482ENUMDOC 2483 This is an 18-bit pc-relative reloc with 2484 the right 3 bits assumed to be 0. 2485ENUM 2486 BFD_RELOC_D30V_21_PCREL_R 2487ENUMDOC 2488 This is an 18-bit pc-relative reloc with 2489 the right 3 bits assumed to be 0. Same 2490 as the previous reloc but on the right side 2491 of the container. 2492ENUM 2493 BFD_RELOC_D30V_32 2494ENUMDOC 2495 This is a 32-bit absolute reloc. 2496ENUM 2497 BFD_RELOC_D30V_32_PCREL 2498ENUMDOC 2499 This is a 32-bit pc-relative reloc. 2500 2501ENUM 2502 BFD_RELOC_M32R_24 2503ENUMDOC 2504 Mitsubishi M32R relocs. 2505 This is a 24 bit absolute address. 2506ENUM 2507 BFD_RELOC_M32R_10_PCREL 2508ENUMDOC 2509 This is a 10-bit pc-relative reloc with the right 2 bits assumed to be 0. 2510ENUM 2511 BFD_RELOC_M32R_18_PCREL 2512ENUMDOC 2513 This is an 18-bit reloc with the right 2 bits assumed to be 0. 2514ENUM 2515 BFD_RELOC_M32R_26_PCREL 2516ENUMDOC 2517 This is a 26-bit reloc with the right 2 bits assumed to be 0. 2518ENUM 2519 BFD_RELOC_M32R_HI16_ULO 2520ENUMDOC 2521 This is a 16-bit reloc containing the high 16 bits of an address 2522 used when the lower 16 bits are treated as unsigned. 2523ENUM 2524 BFD_RELOC_M32R_HI16_SLO 2525ENUMDOC 2526 This is a 16-bit reloc containing the high 16 bits of an address 2527 used when the lower 16 bits are treated as signed. 2528ENUM 2529 BFD_RELOC_M32R_LO16 2530ENUMDOC 2531 This is a 16-bit reloc containing the lower 16 bits of an address. 2532ENUM 2533 BFD_RELOC_M32R_SDA16 2534ENUMDOC 2535 This is a 16-bit reloc containing the small data area offset for use in 2536 add3, load, and store instructions. 2537 2538ENUM 2539 BFD_RELOC_V850_9_PCREL 2540ENUMDOC 2541 This is a 9-bit reloc 2542ENUM 2543 BFD_RELOC_V850_22_PCREL 2544ENUMDOC 2545 This is a 22-bit reloc 2546 2547ENUM 2548 BFD_RELOC_V850_SDA_16_16_OFFSET 2549ENUMDOC 2550 This is a 16 bit offset from the short data area pointer. 2551ENUM 2552 BFD_RELOC_V850_SDA_15_16_OFFSET 2553ENUMDOC 2554 This is a 16 bit offset (of which only 15 bits are used) from the 2555 short data area pointer. 2556ENUM 2557 BFD_RELOC_V850_ZDA_16_16_OFFSET 2558ENUMDOC 2559 This is a 16 bit offset from the zero data area pointer. 2560ENUM 2561 BFD_RELOC_V850_ZDA_15_16_OFFSET 2562ENUMDOC 2563 This is a 16 bit offset (of which only 15 bits are used) from the 2564 zero data area pointer. 2565ENUM 2566 BFD_RELOC_V850_TDA_6_8_OFFSET 2567ENUMDOC 2568 This is an 8 bit offset (of which only 6 bits are used) from the 2569 tiny data area pointer. 2570ENUM 2571 BFD_RELOC_V850_TDA_7_8_OFFSET 2572ENUMDOC 2573 This is an 8bit offset (of which only 7 bits are used) from the tiny 2574 data area pointer. 2575ENUM 2576 BFD_RELOC_V850_TDA_7_7_OFFSET 2577ENUMDOC 2578 This is a 7 bit offset from the tiny data area pointer. 2579ENUM 2580 BFD_RELOC_V850_TDA_16_16_OFFSET 2581ENUMDOC 2582 This is a 16 bit offset from the tiny data area pointer. 2583COMMENT 2584ENUM 2585 BFD_RELOC_V850_TDA_4_5_OFFSET 2586ENUMDOC 2587 This is a 5 bit offset (of which only 4 bits are used) from the tiny 2588 data area pointer. 2589ENUM 2590 BFD_RELOC_V850_TDA_4_4_OFFSET 2591ENUMDOC 2592 This is a 4 bit offset from the tiny data area pointer. 2593ENUM 2594 BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET 2595ENUMDOC 2596 This is a 16 bit offset from the short data area pointer, with the 2597 bits placed non-contigously in the instruction. 2598ENUM 2599 BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET 2600ENUMDOC 2601 This is a 16 bit offset from the zero data area pointer, with the 2602 bits placed non-contigously in the instruction. 2603ENUM 2604 BFD_RELOC_V850_CALLT_6_7_OFFSET 2605ENUMDOC 2606 This is a 6 bit offset from the call table base pointer. 2607ENUM 2608 BFD_RELOC_V850_CALLT_16_16_OFFSET 2609ENUMDOC 2610 This is a 16 bit offset from the call table base pointer. 2611COMMENT 2612 2613ENUM 2614 BFD_RELOC_MN10300_32_PCREL 2615ENUMDOC 2616 This is a 32bit pcrel reloc for the mn10300, offset by two bytes in the 2617 instruction. 2618ENUM 2619 BFD_RELOC_MN10300_16_PCREL 2620ENUMDOC 2621 This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the 2622 instruction. 2623 2624ENUM 2625 BFD_RELOC_TIC30_LDP 2626ENUMDOC 2627 This is a 8bit DP reloc for the tms320c30, where the most 2628 significant 8 bits of a 24 bit word are placed into the least 2629 significant 8 bits of the opcode. 2630 2631ENUM 2632 BFD_RELOC_TIC54X_PARTLS7 2633ENUMDOC 2634 This is a 7bit reloc for the tms320c54x, where the least 2635 significant 7 bits of a 16 bit word are placed into the least 2636 significant 7 bits of the opcode. 2637 2638ENUM 2639 BFD_RELOC_TIC54X_PARTMS9 2640ENUMDOC 2641 This is a 9bit DP reloc for the tms320c54x, where the most 2642 significant 9 bits of a 16 bit word are placed into the least 2643 significant 9 bits of the opcode. 2644 2645ENUM 2646 BFD_RELOC_TIC54X_23 2647ENUMDOC 2648 This is an extended address 23-bit reloc for the tms320c54x. 2649 2650ENUM 2651 BFD_RELOC_TIC54X_16_OF_23 2652ENUMDOC 2653 This is a 16-bit reloc for the tms320c54x, where the least 2654 significant 16 bits of a 23-bit extended address are placed into 2655 the opcode. 2656 2657ENUM 2658 BFD_RELOC_TIC54X_MS7_OF_23 2659ENUMDOC 2660 This is a reloc for the tms320c54x, where the most 2661 significant 7 bits of a 23-bit extended address are placed into 2662 the opcode. 2663 2664ENUM 2665 BFD_RELOC_FR30_48 2666ENUMDOC 2667 This is a 48 bit reloc for the FR30 that stores 32 bits. 2668ENUM 2669 BFD_RELOC_FR30_20 2670ENUMDOC 2671 This is a 32 bit reloc for the FR30 that stores 20 bits split up into 2672 two sections. 2673ENUM 2674 BFD_RELOC_FR30_6_IN_4 2675ENUMDOC 2676 This is a 16 bit reloc for the FR30 that stores a 6 bit word offset in 2677 4 bits. 2678ENUM 2679 BFD_RELOC_FR30_8_IN_8 2680ENUMDOC 2681 This is a 16 bit reloc for the FR30 that stores an 8 bit byte offset 2682 into 8 bits. 2683ENUM 2684 BFD_RELOC_FR30_9_IN_8 2685ENUMDOC 2686 This is a 16 bit reloc for the FR30 that stores a 9 bit short offset 2687 into 8 bits. 2688ENUM 2689 BFD_RELOC_FR30_10_IN_8 2690ENUMDOC 2691 This is a 16 bit reloc for the FR30 that stores a 10 bit word offset 2692 into 8 bits. 2693ENUM 2694 BFD_RELOC_FR30_9_PCREL 2695ENUMDOC 2696 This is a 16 bit reloc for the FR30 that stores a 9 bit pc relative 2697 short offset into 8 bits. 2698ENUM 2699 BFD_RELOC_FR30_12_PCREL 2700ENUMDOC 2701 This is a 16 bit reloc for the FR30 that stores a 12 bit pc relative 2702 short offset into 11 bits. 2703 2704ENUM 2705 BFD_RELOC_MCORE_PCREL_IMM8BY4 2706ENUMX 2707 BFD_RELOC_MCORE_PCREL_IMM11BY2 2708ENUMX 2709 BFD_RELOC_MCORE_PCREL_IMM4BY2 2710ENUMX 2711 BFD_RELOC_MCORE_PCREL_32 2712ENUMX 2713 BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2 2714ENUMX 2715 BFD_RELOC_MCORE_RVA 2716ENUMDOC 2717 Motorola Mcore relocations. 2718 2719ENUM 2720 BFD_RELOC_MMIX_GETA 2721ENUMX 2722 BFD_RELOC_MMIX_GETA_1 2723ENUMX 2724 BFD_RELOC_MMIX_GETA_2 2725ENUMX 2726 BFD_RELOC_MMIX_GETA_3 2727ENUMDOC 2728 These are relocations for the GETA instruction. 2729ENUM 2730 BFD_RELOC_MMIX_CBRANCH 2731ENUMX 2732 BFD_RELOC_MMIX_CBRANCH_J 2733ENUMX 2734 BFD_RELOC_MMIX_CBRANCH_1 2735ENUMX 2736 BFD_RELOC_MMIX_CBRANCH_2 2737ENUMX 2738 BFD_RELOC_MMIX_CBRANCH_3 2739ENUMDOC 2740 These are relocations for a conditional branch instruction. 2741ENUM 2742 BFD_RELOC_MMIX_PUSHJ 2743ENUMX 2744 BFD_RELOC_MMIX_PUSHJ_1 2745ENUMX 2746 BFD_RELOC_MMIX_PUSHJ_2 2747ENUMX 2748 BFD_RELOC_MMIX_PUSHJ_3 2749ENUMDOC 2750 These are relocations for the PUSHJ instruction. 2751ENUM 2752 BFD_RELOC_MMIX_JMP 2753ENUMX 2754 BFD_RELOC_MMIX_JMP_1 2755ENUMX 2756 BFD_RELOC_MMIX_JMP_2 2757ENUMX 2758 BFD_RELOC_MMIX_JMP_3 2759ENUMDOC 2760 These are relocations for the JMP instruction. 2761ENUM 2762 BFD_RELOC_MMIX_ADDR19 2763ENUMDOC 2764 This is a relocation for a relative address as in a GETA instruction or 2765 a branch. 2766ENUM 2767 BFD_RELOC_MMIX_ADDR27 2768ENUMDOC 2769 This is a relocation for a relative address as in a JMP instruction. 2770ENUM 2771 BFD_RELOC_MMIX_REG_OR_BYTE 2772ENUMDOC 2773 This is a relocation for an instruction field that may be a general 2774 register or a value 0..255. 2775ENUM 2776 BFD_RELOC_MMIX_REG 2777ENUMDOC 2778 This is a relocation for an instruction field that may be a general 2779 register. 2780ENUM 2781 BFD_RELOC_MMIX_BASE_PLUS_OFFSET 2782ENUMDOC 2783 This is a relocation for two instruction fields holding a register and 2784 an offset, the equivalent of the relocation. 2785ENUM 2786 BFD_RELOC_MMIX_LOCAL 2787ENUMDOC 2788 This relocation is an assertion that the expression is not allocated as 2789 a global register. It does not modify contents. 2790 2791ENUM 2792 BFD_RELOC_AVR_7_PCREL 2793ENUMDOC 2794 This is a 16 bit reloc for the AVR that stores 8 bit pc relative 2795 short offset into 7 bits. 2796ENUM 2797 BFD_RELOC_AVR_13_PCREL 2798ENUMDOC 2799 This is a 16 bit reloc for the AVR that stores 13 bit pc relative 2800 short offset into 12 bits. 2801ENUM 2802 BFD_RELOC_AVR_16_PM 2803ENUMDOC 2804 This is a 16 bit reloc for the AVR that stores 17 bit value (usually 2805 program memory address) into 16 bits. 2806ENUM 2807 BFD_RELOC_AVR_LO8_LDI 2808ENUMDOC 2809 This is a 16 bit reloc for the AVR that stores 8 bit value (usually 2810 data memory address) into 8 bit immediate value of LDI insn. 2811ENUM 2812 BFD_RELOC_AVR_HI8_LDI 2813ENUMDOC 2814 This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit 2815 of data memory address) into 8 bit immediate value of LDI insn. 2816ENUM 2817 BFD_RELOC_AVR_HH8_LDI 2818ENUMDOC 2819 This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit 2820 of program memory address) into 8 bit immediate value of LDI insn. 2821ENUM 2822 BFD_RELOC_AVR_LO8_LDI_NEG 2823ENUMDOC 2824 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2825 (usually data memory address) into 8 bit immediate value of SUBI insn. 2826ENUM 2827 BFD_RELOC_AVR_HI8_LDI_NEG 2828ENUMDOC 2829 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2830 (high 8 bit of data memory address) into 8 bit immediate value of 2831 SUBI insn. 2832ENUM 2833 BFD_RELOC_AVR_HH8_LDI_NEG 2834ENUMDOC 2835 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2836 (most high 8 bit of program memory address) into 8 bit immediate value 2837 of LDI or SUBI insn. 2838ENUM 2839 BFD_RELOC_AVR_LO8_LDI_PM 2840ENUMDOC 2841 This is a 16 bit reloc for the AVR that stores 8 bit value (usually 2842 command address) into 8 bit immediate value of LDI insn. 2843ENUM 2844 BFD_RELOC_AVR_HI8_LDI_PM 2845ENUMDOC 2846 This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit 2847 of command address) into 8 bit immediate value of LDI insn. 2848ENUM 2849 BFD_RELOC_AVR_HH8_LDI_PM 2850ENUMDOC 2851 This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit 2852 of command address) into 8 bit immediate value of LDI insn. 2853ENUM 2854 BFD_RELOC_AVR_LO8_LDI_PM_NEG 2855ENUMDOC 2856 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2857 (usually command address) into 8 bit immediate value of SUBI insn. 2858ENUM 2859 BFD_RELOC_AVR_HI8_LDI_PM_NEG 2860ENUMDOC 2861 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2862 (high 8 bit of 16 bit command address) into 8 bit immediate value 2863 of SUBI insn. 2864ENUM 2865 BFD_RELOC_AVR_HH8_LDI_PM_NEG 2866ENUMDOC 2867 This is a 16 bit reloc for the AVR that stores negated 8 bit value 2868 (high 6 bit of 22 bit command address) into 8 bit immediate 2869 value of SUBI insn. 2870ENUM 2871 BFD_RELOC_AVR_CALL 2872ENUMDOC 2873 This is a 32 bit reloc for the AVR that stores 23 bit value 2874 into 22 bits. 2875 2876ENUM 2877 BFD_RELOC_390_12 2878ENUMDOC 2879 Direct 12 bit. 2880ENUM 2881 BFD_RELOC_390_GOT12 2882ENUMDOC 2883 12 bit GOT offset. 2884ENUM 2885 BFD_RELOC_390_PLT32 2886ENUMDOC 2887 32 bit PC relative PLT address. 2888ENUM 2889 BFD_RELOC_390_COPY 2890ENUMDOC 2891 Copy symbol at runtime. 2892ENUM 2893 BFD_RELOC_390_GLOB_DAT 2894ENUMDOC 2895 Create GOT entry. 2896ENUM 2897 BFD_RELOC_390_JMP_SLOT 2898ENUMDOC 2899 Create PLT entry. 2900ENUM 2901 BFD_RELOC_390_RELATIVE 2902ENUMDOC 2903 Adjust by program base. 2904ENUM 2905 BFD_RELOC_390_GOTPC 2906ENUMDOC 2907 32 bit PC relative offset to GOT. 2908ENUM 2909 BFD_RELOC_390_GOT16 2910ENUMDOC 2911 16 bit GOT offset. 2912ENUM 2913 BFD_RELOC_390_PC16DBL 2914ENUMDOC 2915 PC relative 16 bit shifted by 1. 2916ENUM 2917 BFD_RELOC_390_PLT16DBL 2918ENUMDOC 2919 16 bit PC rel. PLT shifted by 1. 2920ENUM 2921 BFD_RELOC_390_PC32DBL 2922ENUMDOC 2923 PC relative 32 bit shifted by 1. 2924ENUM 2925 BFD_RELOC_390_PLT32DBL 2926ENUMDOC 2927 32 bit PC rel. PLT shifted by 1. 2928ENUM 2929 BFD_RELOC_390_GOTPCDBL 2930ENUMDOC 2931 32 bit PC rel. GOT shifted by 1. 2932ENUM 2933 BFD_RELOC_390_GOT64 2934ENUMDOC 2935 64 bit GOT offset. 2936ENUM 2937 BFD_RELOC_390_PLT64 2938ENUMDOC 2939 64 bit PC relative PLT address. 2940ENUM 2941 BFD_RELOC_390_GOTENT 2942ENUMDOC 2943 32 bit rel. offset to GOT entry. 2944 2945ENUM 2946 BFD_RELOC_VTABLE_INHERIT 2947ENUMX 2948 BFD_RELOC_VTABLE_ENTRY 2949ENUMDOC 2950 These two relocations are used by the linker to determine which of 2951 the entries in a C++ virtual function table are actually used. When 2952 the --gc-sections option is given, the linker will zero out the entries 2953 that are not used, so that the code for those functions need not be 2954 included in the output. 2955 2956 VTABLE_INHERIT is a zero-space relocation used to describe to the 2957 linker the inheritence tree of a C++ virtual function table. The 2958 relocation's symbol should be the parent class' vtable, and the 2959 relocation should be located at the child vtable. 2960 2961 VTABLE_ENTRY is a zero-space relocation that describes the use of a 2962 virtual function table entry. The reloc's symbol should refer to the 2963 table of the class mentioned in the code. Off of that base, an offset 2964 describes the entry that is being used. For Rela hosts, this offset 2965 is stored in the reloc's addend. For Rel hosts, we are forced to put 2966 this offset in the reloc's section offset. 2967 2968ENUM 2969 BFD_RELOC_IA64_IMM14 2970ENUMX 2971 BFD_RELOC_IA64_IMM22 2972ENUMX 2973 BFD_RELOC_IA64_IMM64 2974ENUMX 2975 BFD_RELOC_IA64_DIR32MSB 2976ENUMX 2977 BFD_RELOC_IA64_DIR32LSB 2978ENUMX 2979 BFD_RELOC_IA64_DIR64MSB 2980ENUMX 2981 BFD_RELOC_IA64_DIR64LSB 2982ENUMX 2983 BFD_RELOC_IA64_GPREL22 2984ENUMX 2985 BFD_RELOC_IA64_GPREL64I 2986ENUMX 2987 BFD_RELOC_IA64_GPREL32MSB 2988ENUMX 2989 BFD_RELOC_IA64_GPREL32LSB 2990ENUMX 2991 BFD_RELOC_IA64_GPREL64MSB 2992ENUMX 2993 BFD_RELOC_IA64_GPREL64LSB 2994ENUMX 2995 BFD_RELOC_IA64_LTOFF22 2996ENUMX 2997 BFD_RELOC_IA64_LTOFF64I 2998ENUMX 2999 BFD_RELOC_IA64_PLTOFF22 3000ENUMX 3001 BFD_RELOC_IA64_PLTOFF64I 3002ENUMX 3003 BFD_RELOC_IA64_PLTOFF64MSB 3004ENUMX 3005 BFD_RELOC_IA64_PLTOFF64LSB 3006ENUMX 3007 BFD_RELOC_IA64_FPTR64I 3008ENUMX 3009 BFD_RELOC_IA64_FPTR32MSB 3010ENUMX 3011 BFD_RELOC_IA64_FPTR32LSB 3012ENUMX 3013 BFD_RELOC_IA64_FPTR64MSB 3014ENUMX 3015 BFD_RELOC_IA64_FPTR64LSB 3016ENUMX 3017 BFD_RELOC_IA64_PCREL21B 3018ENUMX 3019 BFD_RELOC_IA64_PCREL21BI 3020ENUMX 3021 BFD_RELOC_IA64_PCREL21M 3022ENUMX 3023 BFD_RELOC_IA64_PCREL21F 3024ENUMX 3025 BFD_RELOC_IA64_PCREL22 3026ENUMX 3027 BFD_RELOC_IA64_PCREL60B 3028ENUMX 3029 BFD_RELOC_IA64_PCREL64I 3030ENUMX 3031 BFD_RELOC_IA64_PCREL32MSB 3032ENUMX 3033 BFD_RELOC_IA64_PCREL32LSB 3034ENUMX 3035 BFD_RELOC_IA64_PCREL64MSB 3036ENUMX 3037 BFD_RELOC_IA64_PCREL64LSB 3038ENUMX 3039 BFD_RELOC_IA64_LTOFF_FPTR22 3040ENUMX 3041 BFD_RELOC_IA64_LTOFF_FPTR64I 3042ENUMX 3043 BFD_RELOC_IA64_LTOFF_FPTR32MSB 3044ENUMX 3045 BFD_RELOC_IA64_LTOFF_FPTR32LSB 3046ENUMX 3047 BFD_RELOC_IA64_LTOFF_FPTR64MSB 3048ENUMX 3049 BFD_RELOC_IA64_LTOFF_FPTR64LSB 3050ENUMX 3051 BFD_RELOC_IA64_SEGREL32MSB 3052ENUMX 3053 BFD_RELOC_IA64_SEGREL32LSB 3054ENUMX 3055 BFD_RELOC_IA64_SEGREL64MSB 3056ENUMX 3057 BFD_RELOC_IA64_SEGREL64LSB 3058ENUMX 3059 BFD_RELOC_IA64_SECREL32MSB 3060ENUMX 3061 BFD_RELOC_IA64_SECREL32LSB 3062ENUMX 3063 BFD_RELOC_IA64_SECREL64MSB 3064ENUMX 3065 BFD_RELOC_IA64_SECREL64LSB 3066ENUMX 3067 BFD_RELOC_IA64_REL32MSB 3068ENUMX 3069 BFD_RELOC_IA64_REL32LSB 3070ENUMX 3071 BFD_RELOC_IA64_REL64MSB 3072ENUMX 3073 BFD_RELOC_IA64_REL64LSB 3074ENUMX 3075 BFD_RELOC_IA64_LTV32MSB 3076ENUMX 3077 BFD_RELOC_IA64_LTV32LSB 3078ENUMX 3079 BFD_RELOC_IA64_LTV64MSB 3080ENUMX 3081 BFD_RELOC_IA64_LTV64LSB 3082ENUMX 3083 BFD_RELOC_IA64_IPLTMSB 3084ENUMX 3085 BFD_RELOC_IA64_IPLTLSB 3086ENUMX 3087 BFD_RELOC_IA64_COPY 3088ENUMX 3089 BFD_RELOC_IA64_TPREL22 3090ENUMX 3091 BFD_RELOC_IA64_TPREL64MSB 3092ENUMX 3093 BFD_RELOC_IA64_TPREL64LSB 3094ENUMX 3095 BFD_RELOC_IA64_LTOFF_TP22 3096ENUMX 3097 BFD_RELOC_IA64_LTOFF22X 3098ENUMX 3099 BFD_RELOC_IA64_LDXMOV 3100ENUMDOC 3101 Intel IA64 Relocations. 3102 3103ENUM 3104 BFD_RELOC_M68HC11_HI8 3105ENUMDOC 3106 Motorola 68HC11 reloc. 3107 This is the 8 bits high part of an absolute address. 3108ENUM 3109 BFD_RELOC_M68HC11_LO8 3110ENUMDOC 3111 Motorola 68HC11 reloc. 3112 This is the 8 bits low part of an absolute address. 3113ENUM 3114 BFD_RELOC_M68HC11_3B 3115ENUMDOC 3116 Motorola 68HC11 reloc. 3117 This is the 3 bits of a value. 3118 3119ENUM 3120 BFD_RELOC_CRIS_BDISP8 3121ENUMX 3122 BFD_RELOC_CRIS_UNSIGNED_5 3123ENUMX 3124 BFD_RELOC_CRIS_SIGNED_6 3125ENUMX 3126 BFD_RELOC_CRIS_UNSIGNED_6 3127ENUMX 3128 BFD_RELOC_CRIS_UNSIGNED_4 3129ENUMDOC 3130 These relocs are only used within the CRIS assembler. They are not 3131 (at present) written to any object files. 3132ENUM 3133 BFD_RELOC_CRIS_COPY 3134ENUMX 3135 BFD_RELOC_CRIS_GLOB_DAT 3136ENUMX 3137 BFD_RELOC_CRIS_JUMP_SLOT 3138ENUMX 3139 BFD_RELOC_CRIS_RELATIVE 3140ENUMDOC 3141 Relocs used in ELF shared libraries for CRIS. 3142ENUM 3143 BFD_RELOC_CRIS_32_GOT 3144ENUMDOC 3145 32-bit offset to symbol-entry within GOT. 3146ENUM 3147 BFD_RELOC_CRIS_16_GOT 3148ENUMDOC 3149 16-bit offset to symbol-entry within GOT. 3150ENUM 3151 BFD_RELOC_CRIS_32_GOTPLT 3152ENUMDOC 3153 32-bit offset to symbol-entry within GOT, with PLT handling. 3154ENUM 3155 BFD_RELOC_CRIS_16_GOTPLT 3156ENUMDOC 3157 16-bit offset to symbol-entry within GOT, with PLT handling. 3158ENUM 3159 BFD_RELOC_CRIS_32_GOTREL 3160ENUMDOC 3161 32-bit offset to symbol, relative to GOT. 3162ENUM 3163 BFD_RELOC_CRIS_32_PLT_GOTREL 3164ENUMDOC 3165 32-bit offset to symbol with PLT entry, relative to GOT. 3166ENUM 3167 BFD_RELOC_CRIS_32_PLT_PCREL 3168ENUMDOC 3169 32-bit offset to symbol with PLT entry, relative to this relocation. 3170 3171ENUM 3172 BFD_RELOC_860_COPY 3173ENUMX 3174 BFD_RELOC_860_GLOB_DAT 3175ENUMX 3176 BFD_RELOC_860_JUMP_SLOT 3177ENUMX 3178 BFD_RELOC_860_RELATIVE 3179ENUMX 3180 BFD_RELOC_860_PC26 3181ENUMX 3182 BFD_RELOC_860_PLT26 3183ENUMX 3184 BFD_RELOC_860_PC16 3185ENUMX 3186 BFD_RELOC_860_LOW0 3187ENUMX 3188 BFD_RELOC_860_SPLIT0 3189ENUMX 3190 BFD_RELOC_860_LOW1 3191ENUMX 3192 BFD_RELOC_860_SPLIT1 3193ENUMX 3194 BFD_RELOC_860_LOW2 3195ENUMX 3196 BFD_RELOC_860_SPLIT2 3197ENUMX 3198 BFD_RELOC_860_LOW3 3199ENUMX 3200 BFD_RELOC_860_LOGOT0 3201ENUMX 3202 BFD_RELOC_860_SPGOT0 3203ENUMX 3204 BFD_RELOC_860_LOGOT1 3205ENUMX 3206 BFD_RELOC_860_SPGOT1 3207ENUMX 3208 BFD_RELOC_860_LOGOTOFF0 3209ENUMX 3210 BFD_RELOC_860_SPGOTOFF0 3211ENUMX 3212 BFD_RELOC_860_LOGOTOFF1 3213ENUMX 3214 BFD_RELOC_860_SPGOTOFF1 3215ENUMX 3216 BFD_RELOC_860_LOGOTOFF2 3217ENUMX 3218 BFD_RELOC_860_LOGOTOFF3 3219ENUMX 3220 BFD_RELOC_860_LOPC 3221ENUMX 3222 BFD_RELOC_860_HIGHADJ 3223ENUMX 3224 BFD_RELOC_860_HAGOT 3225ENUMX 3226 BFD_RELOC_860_HAGOTOFF 3227ENUMX 3228 BFD_RELOC_860_HAPC 3229ENUMX 3230 BFD_RELOC_860_HIGH 3231ENUMX 3232 BFD_RELOC_860_HIGOT 3233ENUMX 3234 BFD_RELOC_860_HIGOTOFF 3235ENUMDOC 3236 Intel i860 Relocations. 3237 3238ENUM 3239 BFD_RELOC_OPENRISC_ABS_26 3240ENUMX 3241 BFD_RELOC_OPENRISC_REL_26 3242ENUMDOC 3243 OpenRISC Relocations. 3244 3245ENUM 3246 BFD_RELOC_H8_DIR16A8 3247ENUMX 3248 BFD_RELOC_H8_DIR16R8 3249ENUMX 3250 BFD_RELOC_H8_DIR24A8 3251ENUMX 3252 BFD_RELOC_H8_DIR24R8 3253ENUMX 3254 BFD_RELOC_H8_DIR32A16 3255ENUMDOC 3256 H8 elf Relocations. 3257 3258ENUM 3259 BFD_RELOC_XSTORMY16_REL_12 3260ENUMX 3261 BFD_RELOC_XSTORMY16_24 3262ENUMX 3263 BFD_RELOC_XSTORMY16_FPTR16 3264ENUMDOC 3265 Sony Xstormy16 Relocations. 3266 3267ENDSENUM 3268 BFD_RELOC_UNUSED 3269CODE_FRAGMENT 3270. 3271.typedef enum bfd_reloc_code_real bfd_reloc_code_real_type; 3272*/ 3273 3274/* 3275FUNCTION 3276 bfd_reloc_type_lookup 3277 3278SYNOPSIS 3279 reloc_howto_type * 3280 bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code); 3281 3282DESCRIPTION 3283 Return a pointer to a howto structure which, when 3284 invoked, will perform the relocation @var{code} on data from the 3285 architecture noted. 3286 3287*/ 3288 3289reloc_howto_type * 3290bfd_reloc_type_lookup (abfd, code) 3291 bfd *abfd; 3292 bfd_reloc_code_real_type code; 3293{ 3294 return BFD_SEND (abfd, reloc_type_lookup, (abfd, code)); 3295} 3296 3297static reloc_howto_type bfd_howto_32 = 3298HOWTO (0, 00, 2, 32, false, 0, complain_overflow_bitfield, 0, "VRT32", false, 0xffffffff, 0xffffffff, true); 3299 3300/* 3301INTERNAL_FUNCTION 3302 bfd_default_reloc_type_lookup 3303 3304SYNOPSIS 3305 reloc_howto_type *bfd_default_reloc_type_lookup 3306 (bfd *abfd, bfd_reloc_code_real_type code); 3307 3308DESCRIPTION 3309 Provides a default relocation lookup routine for any architecture. 3310 3311*/ 3312 3313reloc_howto_type * 3314bfd_default_reloc_type_lookup (abfd, code) 3315 bfd *abfd; 3316 bfd_reloc_code_real_type code; 3317{ 3318 switch (code) 3319 { 3320 case BFD_RELOC_CTOR: 3321 /* The type of reloc used in a ctor, which will be as wide as the 3322 address - so either a 64, 32, or 16 bitter. */ 3323 switch (bfd_get_arch_info (abfd)->bits_per_address) 3324 { 3325 case 64: 3326 BFD_FAIL (); 3327 case 32: 3328 return &bfd_howto_32; 3329 case 16: 3330 BFD_FAIL (); 3331 default: 3332 BFD_FAIL (); 3333 } 3334 default: 3335 BFD_FAIL (); 3336 } 3337 return (reloc_howto_type *) NULL; 3338} 3339 3340/* 3341FUNCTION 3342 bfd_get_reloc_code_name 3343 3344SYNOPSIS 3345 const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code); 3346 3347DESCRIPTION 3348 Provides a printable name for the supplied relocation code. 3349 Useful mainly for printing error messages. 3350*/ 3351 3352const char * 3353bfd_get_reloc_code_name (code) 3354 bfd_reloc_code_real_type code; 3355{ 3356 if (code > BFD_RELOC_UNUSED) 3357 return 0; 3358 return bfd_reloc_code_real_names[(int)code]; 3359} 3360 3361/* 3362INTERNAL_FUNCTION 3363 bfd_generic_relax_section 3364 3365SYNOPSIS 3366 boolean bfd_generic_relax_section 3367 (bfd *abfd, 3368 asection *section, 3369 struct bfd_link_info *, 3370 boolean *); 3371 3372DESCRIPTION 3373 Provides default handling for relaxing for back ends which 3374 don't do relaxing -- i.e., does nothing. 3375*/ 3376 3377/*ARGSUSED*/ 3378boolean 3379bfd_generic_relax_section (abfd, section, link_info, again) 3380 bfd *abfd ATTRIBUTE_UNUSED; 3381 asection *section ATTRIBUTE_UNUSED; 3382 struct bfd_link_info *link_info ATTRIBUTE_UNUSED; 3383 boolean *again; 3384{ 3385 *again = false; 3386 return true; 3387} 3388 3389/* 3390INTERNAL_FUNCTION 3391 bfd_generic_gc_sections 3392 3393SYNOPSIS 3394 boolean bfd_generic_gc_sections 3395 (bfd *, struct bfd_link_info *); 3396 3397DESCRIPTION 3398 Provides default handling for relaxing for back ends which 3399 don't do section gc -- i.e., does nothing. 3400*/ 3401 3402/*ARGSUSED*/ 3403boolean 3404bfd_generic_gc_sections (abfd, link_info) 3405 bfd *abfd ATTRIBUTE_UNUSED; 3406 struct bfd_link_info *link_info ATTRIBUTE_UNUSED; 3407{ 3408 return true; 3409} 3410 3411/* 3412INTERNAL_FUNCTION 3413 bfd_generic_merge_sections 3414 3415SYNOPSIS 3416 boolean bfd_generic_merge_sections 3417 (bfd *, struct bfd_link_info *); 3418 3419DESCRIPTION 3420 Provides default handling for SEC_MERGE section merging for back ends 3421 which don't have SEC_MERGE support -- i.e., does nothing. 3422*/ 3423 3424/*ARGSUSED*/ 3425boolean 3426bfd_generic_merge_sections (abfd, link_info) 3427 bfd *abfd ATTRIBUTE_UNUSED; 3428 struct bfd_link_info *link_info ATTRIBUTE_UNUSED; 3429{ 3430 return true; 3431} 3432 3433/* 3434INTERNAL_FUNCTION 3435 bfd_generic_get_relocated_section_contents 3436 3437SYNOPSIS 3438 bfd_byte * 3439 bfd_generic_get_relocated_section_contents (bfd *abfd, 3440 struct bfd_link_info *link_info, 3441 struct bfd_link_order *link_order, 3442 bfd_byte *data, 3443 boolean relocateable, 3444 asymbol **symbols); 3445 3446DESCRIPTION 3447 Provides default handling of relocation effort for back ends 3448 which can't be bothered to do it efficiently. 3449 3450*/ 3451 3452bfd_byte * 3453bfd_generic_get_relocated_section_contents (abfd, link_info, link_order, data, 3454 relocateable, symbols) 3455 bfd *abfd; 3456 struct bfd_link_info *link_info; 3457 struct bfd_link_order *link_order; 3458 bfd_byte *data; 3459 boolean relocateable; 3460 asymbol **symbols; 3461{ 3462 /* Get enough memory to hold the stuff */ 3463 bfd *input_bfd = link_order->u.indirect.section->owner; 3464 asection *input_section = link_order->u.indirect.section; 3465 3466 long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); 3467 arelent **reloc_vector = NULL; 3468 long reloc_count; 3469 3470 if (reloc_size < 0) 3471 goto error_return; 3472 3473 reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); 3474 if (reloc_vector == NULL && reloc_size != 0) 3475 goto error_return; 3476 3477 /* read in the section */ 3478 if (!bfd_get_section_contents (input_bfd, 3479 input_section, 3480 (PTR) data, 3481 (bfd_vma) 0, 3482 input_section->_raw_size)) 3483 goto error_return; 3484 3485 /* We're not relaxing the section, so just copy the size info */ 3486 input_section->_cooked_size = input_section->_raw_size; 3487 input_section->reloc_done = true; 3488 3489 reloc_count = bfd_canonicalize_reloc (input_bfd, 3490 input_section, 3491 reloc_vector, 3492 symbols); 3493 if (reloc_count < 0) 3494 goto error_return; 3495 3496 if (reloc_count > 0) 3497 { 3498 arelent **parent; 3499 for (parent = reloc_vector; *parent != (arelent *) NULL; 3500 parent++) 3501 { 3502 char *error_message = (char *) NULL; 3503 bfd_reloc_status_type r = 3504 bfd_perform_relocation (input_bfd, 3505 *parent, 3506 (PTR) data, 3507 input_section, 3508 relocateable ? abfd : (bfd *) NULL, 3509 &error_message); 3510 3511 if (relocateable) 3512 { 3513 asection *os = input_section->output_section; 3514 3515 /* A partial link, so keep the relocs */ 3516 os->orelocation[os->reloc_count] = *parent; 3517 os->reloc_count++; 3518 } 3519 3520 if (r != bfd_reloc_ok) 3521 { 3522 switch (r) 3523 { 3524 case bfd_reloc_undefined: 3525 if (!((*link_info->callbacks->undefined_symbol) 3526 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), 3527 input_bfd, input_section, (*parent)->address, 3528 true))) 3529 goto error_return; 3530 break; 3531 case bfd_reloc_dangerous: 3532 BFD_ASSERT (error_message != (char *) NULL); 3533 if (!((*link_info->callbacks->reloc_dangerous) 3534 (link_info, error_message, input_bfd, input_section, 3535 (*parent)->address))) 3536 goto error_return; 3537 break; 3538 case bfd_reloc_overflow: 3539 if (!((*link_info->callbacks->reloc_overflow) 3540 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), 3541 (*parent)->howto->name, (*parent)->addend, 3542 input_bfd, input_section, (*parent)->address))) 3543 goto error_return; 3544 break; 3545 case bfd_reloc_outofrange: 3546 default: 3547 abort (); 3548 break; 3549 } 3550 3551 } 3552 } 3553 } 3554 if (reloc_vector != NULL) 3555 free (reloc_vector); 3556 return data; 3557 3558error_return: 3559 if (reloc_vector != NULL) 3560 free (reloc_vector); 3561 return NULL; 3562} 3563