| 1 | /* BFD back-end for MIPS PE COFF files. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 3 | 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
| 4 | Modified from coff-i386.c by DJ Delorie, dj@cygnus.com |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #define COFF_WITH_PE |
| 23 | #define COFF_LONG_SECTION_NAMES |
| 24 | #define PCRELOFFSET TRUE |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "sysdep.h" |
| 28 | #include "libbfd.h" |
| 29 | |
| 30 | #include "coff/mipspe.h" |
| 31 | |
| 32 | #include "coff/internal.h" |
| 33 | |
| 34 | #include "coff/pe.h" |
| 35 | |
| 36 | #include "libcoff.h" |
| 37 | |
| 38 | static bfd_reloc_status_type coff_mips_reloc |
| 39 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 40 | static reloc_howto_type *coff_mips_rtype_to_howto |
| 41 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
| 42 | struct coff_link_hash_entry *, struct internal_syment *, |
| 43 | bfd_vma *)); |
| 44 | |
| 45 | static bfd_boolean in_reloc_p |
| 46 | PARAMS ((bfd *, reloc_howto_type *)); |
| 47 | static reloc_howto_type * coff_mips_reloc_type_lookup |
| 48 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 49 | static void mips_swap_reloc_in |
| 50 | PARAMS ((bfd *, PTR, PTR)); |
| 51 | static unsigned int mips_swap_reloc_out |
| 52 | PARAMS ((bfd *, PTR, PTR)); |
| 53 | static bfd_boolean coff_pe_mips_relocate_section |
| 54 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 55 | struct internal_reloc *, struct internal_syment *, asection **)); |
| 56 | |
| 57 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| 58 | /* The page size is a guess based on ELF. */ |
| 59 | |
| 60 | #define COFF_PAGE_SIZE 0x1000 |
| 61 | |
| 62 | /* For some reason when using mips COFF the value stored in the .text |
| 63 | section for a reference to a common symbol is the value itself plus |
| 64 | any desired offset. Ian Taylor, Cygnus Support. */ |
| 65 | |
| 66 | /* If we are producing relocatable output, we need to do some |
| 67 | adjustments to the object file that are not done by the |
| 68 | bfd_perform_relocation function. This function is called by every |
| 69 | reloc type to make any required adjustments. */ |
| 70 | |
| 71 | static bfd_reloc_status_type |
| 72 | coff_mips_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, |
| 73 | error_message) |
| 74 | bfd *abfd; |
| 75 | arelent *reloc_entry; |
| 76 | asymbol *symbol; |
| 77 | PTR data; |
| 78 | asection *input_section ATTRIBUTE_UNUSED; |
| 79 | bfd *output_bfd; |
| 80 | char **error_message ATTRIBUTE_UNUSED; |
| 81 | { |
| 82 | symvalue diff; |
| 83 | |
| 84 | if (output_bfd == (bfd *) NULL) |
| 85 | return bfd_reloc_continue; |
| 86 | |
| 87 | if (bfd_is_com_section (symbol->section)) |
| 88 | { |
| 89 | #ifndef COFF_WITH_PE |
| 90 | /* We are relocating a common symbol. The current value in the |
| 91 | object file is ORIG + OFFSET, where ORIG is the value of the |
| 92 | common symbol as seen by the object file when it was compiled |
| 93 | (this may be zero if the symbol was undefined) and OFFSET is |
| 94 | the offset into the common symbol (normally zero, but may be |
| 95 | non-zero when referring to a field in a common structure). |
| 96 | ORIG is the negative of reloc_entry->addend, which is set by |
| 97 | the CALC_ADDEND macro below. We want to replace the value in |
| 98 | the object file with NEW + OFFSET, where NEW is the value of |
| 99 | the common symbol which we are going to put in the final |
| 100 | object file. NEW is symbol->value. */ |
| 101 | diff = symbol->value + reloc_entry->addend; |
| 102 | #else |
| 103 | /* In PE mode, we do not offset the common symbol. */ |
| 104 | diff = reloc_entry->addend; |
| 105 | #endif |
| 106 | } |
| 107 | else |
| 108 | { |
| 109 | /* For some reason bfd_perform_relocation always effectively |
| 110 | ignores the addend for a COFF target when producing |
| 111 | relocatable output. This seems to be always wrong for 386 |
| 112 | COFF, so we handle the addend here instead. */ |
| 113 | diff = reloc_entry->addend; |
| 114 | } |
| 115 | |
| 116 | #define DOIT(x) \ |
| 117 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) |
| 118 | |
| 119 | if (diff != 0) |
| 120 | { |
| 121 | reloc_howto_type *howto = reloc_entry->howto; |
| 122 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; |
| 123 | |
| 124 | switch (howto->size) |
| 125 | { |
| 126 | case 0: |
| 127 | { |
| 128 | char x = bfd_get_8 (abfd, addr); |
| 129 | DOIT (x); |
| 130 | bfd_put_8 (abfd, x, addr); |
| 131 | } |
| 132 | break; |
| 133 | |
| 134 | case 1: |
| 135 | { |
| 136 | short x = bfd_get_16 (abfd, addr); |
| 137 | DOIT (x); |
| 138 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
| 139 | } |
| 140 | break; |
| 141 | |
| 142 | case 2: |
| 143 | { |
| 144 | long x = bfd_get_32 (abfd, addr); |
| 145 | DOIT (x); |
| 146 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
| 147 | } |
| 148 | break; |
| 149 | |
| 150 | default: |
| 151 | abort (); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /* Now let bfd_perform_relocation finish everything up. */ |
| 156 | return bfd_reloc_continue; |
| 157 | } |
| 158 | |
| 159 | #ifdef COFF_WITH_PE |
| 160 | /* Return TRUE if this relocation should |
| 161 | appear in the output .reloc section. */ |
| 162 | |
| 163 | static bfd_boolean |
| 164 | in_reloc_p (abfd, howto) |
| 165 | bfd * abfd ATTRIBUTE_UNUSED; |
| 166 | reloc_howto_type *howto; |
| 167 | { |
| 168 | return ! howto->pc_relative && howto->type != MIPS_R_RVA; |
| 169 | } |
| 170 | #endif |
| 171 | |
| 172 | #ifndef PCRELOFFSET |
| 173 | #define PCRELOFFSET FALSE |
| 174 | #endif |
| 175 | |
| 176 | static reloc_howto_type howto_table[] = |
| 177 | { |
| 178 | /* Reloc type 0 is ignored. The reloc reading code ensures that |
| 179 | this is a reference to the .abs section, which will cause |
| 180 | bfd_perform_relocation to do nothing. */ |
| 181 | HOWTO (MIPS_R_ABSOLUTE, /* type */ |
| 182 | 0, /* rightshift */ |
| 183 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 184 | 8, /* bitsize */ |
| 185 | FALSE, /* pc_relative */ |
| 186 | 0, /* bitpos */ |
| 187 | complain_overflow_dont, /* complain_on_overflow */ |
| 188 | 0, /* special_function */ |
| 189 | "IGNORE", /* name */ |
| 190 | FALSE, /* partial_inplace */ |
| 191 | 0, /* src_mask */ |
| 192 | 0, /* dst_mask */ |
| 193 | FALSE), /* pcrel_offset */ |
| 194 | |
| 195 | /* A 16 bit reference to a symbol, normally from a data section. */ |
| 196 | HOWTO (MIPS_R_REFHALF, /* type */ |
| 197 | 0, /* rightshift */ |
| 198 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 199 | 16, /* bitsize */ |
| 200 | FALSE, /* pc_relative */ |
| 201 | 0, /* bitpos */ |
| 202 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 203 | coff_mips_reloc, /* special_function */ |
| 204 | "REFHALF", /* name */ |
| 205 | TRUE, /* partial_inplace */ |
| 206 | 0xffff, /* src_mask */ |
| 207 | 0xffff, /* dst_mask */ |
| 208 | FALSE), /* pcrel_offset */ |
| 209 | |
| 210 | /* A 32 bit reference to a symbol, normally from a data section. */ |
| 211 | HOWTO (MIPS_R_REFWORD, /* type */ |
| 212 | 0, /* rightshift */ |
| 213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 214 | 32, /* bitsize */ |
| 215 | FALSE, /* pc_relative */ |
| 216 | 0, /* bitpos */ |
| 217 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 218 | coff_mips_reloc, /* special_function */ |
| 219 | "REFWORD", /* name */ |
| 220 | TRUE, /* partial_inplace */ |
| 221 | 0xffffffff, /* src_mask */ |
| 222 | 0xffffffff, /* dst_mask */ |
| 223 | FALSE), /* pcrel_offset */ |
| 224 | |
| 225 | /* A 26 bit absolute jump address. */ |
| 226 | HOWTO (MIPS_R_JMPADDR, /* type */ |
| 227 | 2, /* rightshift */ |
| 228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 229 | 26, /* bitsize */ |
| 230 | FALSE, /* pc_relative */ |
| 231 | 0, /* bitpos */ |
| 232 | complain_overflow_dont, /* complain_on_overflow */ |
| 233 | /* This needs complex overflow |
| 234 | detection, because the upper four |
| 235 | bits must match the PC. */ |
| 236 | coff_mips_reloc, /* special_function */ |
| 237 | "JMPADDR", /* name */ |
| 238 | TRUE, /* partial_inplace */ |
| 239 | 0x3ffffff, /* src_mask */ |
| 240 | 0x3ffffff, /* dst_mask */ |
| 241 | FALSE), /* pcrel_offset */ |
| 242 | |
| 243 | /* The high 16 bits of a symbol value. Handled by the function |
| 244 | mips_refhi_reloc. */ |
| 245 | HOWTO (MIPS_R_REFHI, /* type */ |
| 246 | 16, /* rightshift */ |
| 247 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 248 | 16, /* bitsize */ |
| 249 | FALSE, /* pc_relative */ |
| 250 | 0, /* bitpos */ |
| 251 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 252 | coff_mips_reloc, /* special_function */ |
| 253 | "REFHI", /* name */ |
| 254 | TRUE, /* partial_inplace */ |
| 255 | 0xffff, /* src_mask */ |
| 256 | 0xffff, /* dst_mask */ |
| 257 | FALSE), /* pcrel_offset */ |
| 258 | |
| 259 | /* The low 16 bits of a symbol value. */ |
| 260 | HOWTO (MIPS_R_REFLO, /* type */ |
| 261 | 0, /* rightshift */ |
| 262 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 263 | 16, /* bitsize */ |
| 264 | FALSE, /* pc_relative */ |
| 265 | 0, /* bitpos */ |
| 266 | complain_overflow_dont, /* complain_on_overflow */ |
| 267 | coff_mips_reloc, /* special_function */ |
| 268 | "REFLO", /* name */ |
| 269 | TRUE, /* partial_inplace */ |
| 270 | 0xffff, /* src_mask */ |
| 271 | 0xffff, /* dst_mask */ |
| 272 | FALSE), /* pcrel_offset */ |
| 273 | |
| 274 | /* A reference to an offset from the gp register. Handled by the |
| 275 | function mips_gprel_reloc. */ |
| 276 | HOWTO (MIPS_R_GPREL, /* type */ |
| 277 | 0, /* rightshift */ |
| 278 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 279 | 16, /* bitsize */ |
| 280 | FALSE, /* pc_relative */ |
| 281 | 0, /* bitpos */ |
| 282 | complain_overflow_signed, /* complain_on_overflow */ |
| 283 | coff_mips_reloc, /* special_function */ |
| 284 | "GPREL", /* name */ |
| 285 | TRUE, /* partial_inplace */ |
| 286 | 0xffff, /* src_mask */ |
| 287 | 0xffff, /* dst_mask */ |
| 288 | FALSE), /* pcrel_offset */ |
| 289 | |
| 290 | /* A reference to a literal using an offset from the gp register. |
| 291 | Handled by the function mips_gprel_reloc. */ |
| 292 | HOWTO (MIPS_R_LITERAL, /* type */ |
| 293 | 0, /* rightshift */ |
| 294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 295 | 16, /* bitsize */ |
| 296 | FALSE, /* pc_relative */ |
| 297 | 0, /* bitpos */ |
| 298 | complain_overflow_signed, /* complain_on_overflow */ |
| 299 | coff_mips_reloc, /* special_function */ |
| 300 | "LITERAL", /* name */ |
| 301 | TRUE, /* partial_inplace */ |
| 302 | 0xffff, /* src_mask */ |
| 303 | 0xffff, /* dst_mask */ |
| 304 | FALSE), /* pcrel_offset */ |
| 305 | |
| 306 | EMPTY_HOWTO (8), |
| 307 | EMPTY_HOWTO (9), |
| 308 | EMPTY_HOWTO (10), |
| 309 | EMPTY_HOWTO (11), |
| 310 | EMPTY_HOWTO (12), |
| 311 | EMPTY_HOWTO (13), |
| 312 | EMPTY_HOWTO (14), |
| 313 | EMPTY_HOWTO (15), |
| 314 | EMPTY_HOWTO (16), |
| 315 | EMPTY_HOWTO (17), |
| 316 | EMPTY_HOWTO (18), |
| 317 | EMPTY_HOWTO (19), |
| 318 | EMPTY_HOWTO (20), |
| 319 | EMPTY_HOWTO (21), |
| 320 | EMPTY_HOWTO (22), |
| 321 | EMPTY_HOWTO (23), |
| 322 | EMPTY_HOWTO (24), |
| 323 | EMPTY_HOWTO (25), |
| 324 | EMPTY_HOWTO (26), |
| 325 | EMPTY_HOWTO (27), |
| 326 | EMPTY_HOWTO (28), |
| 327 | EMPTY_HOWTO (29), |
| 328 | EMPTY_HOWTO (30), |
| 329 | EMPTY_HOWTO (31), |
| 330 | EMPTY_HOWTO (32), |
| 331 | EMPTY_HOWTO (33), |
| 332 | HOWTO (MIPS_R_RVA, /* type */ |
| 333 | 0, /* rightshift */ |
| 334 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 335 | 32, /* bitsize */ |
| 336 | FALSE, /* pc_relative */ |
| 337 | 0, /* bitpos */ |
| 338 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 339 | coff_mips_reloc, /* special_function */ |
| 340 | "rva32", /* name */ |
| 341 | TRUE, /* partial_inplace */ |
| 342 | 0xffffffff, /* src_mask */ |
| 343 | 0xffffffff, /* dst_mask */ |
| 344 | FALSE), /* pcrel_offset */ |
| 345 | EMPTY_HOWTO (35), |
| 346 | EMPTY_HOWTO (36), |
| 347 | HOWTO (MIPS_R_PAIR, /* type */ |
| 348 | 0, /* rightshift */ |
| 349 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 350 | 32, /* bitsize */ |
| 351 | FALSE, /* pc_relative */ |
| 352 | 0, /* bitpos */ |
| 353 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 354 | coff_mips_reloc, /* special_function */ |
| 355 | "PAIR", /* name */ |
| 356 | TRUE, /* partial_inplace */ |
| 357 | 0xffffffff, /* src_mask */ |
| 358 | 0xffffffff, /* dst_mask */ |
| 359 | FALSE), /* pcrel_offset */ |
| 360 | }; |
| 361 | |
| 362 | /* Turn a howto into a reloc nunmber */ |
| 363 | |
| 364 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } |
| 365 | #define BADMAG(x) MIPSBADMAG(x) |
| 366 | #define MIPS 1 /* Customize coffcode.h */ |
| 367 | |
| 368 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
| 369 | (cache_ptr)->howto = howto_table + (dst)->r_type; |
| 370 | |
| 371 | /* Compute the addend of a reloc. If the reloc is to a common symbol, |
| 372 | the object file contains the value of the common symbol. By the |
| 373 | time this is called, the linker may be using a different symbol |
| 374 | from a different object file with a different value. Therefore, we |
| 375 | hack wildly to locate the original symbol from this file so that we |
| 376 | can make the correct adjustment. This macro sets coffsym to the |
| 377 | symbol from the original file, and uses it to set the addend value |
| 378 | correctly. If this is not a common symbol, the usual addend |
| 379 | calculation is done, except that an additional tweak is needed for |
| 380 | PC relative relocs. |
| 381 | FIXME: This macro refers to symbols and asect; these are from the |
| 382 | calling function, not the macro arguments. */ |
| 383 | |
| 384 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ |
| 385 | { \ |
| 386 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ |
| 387 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ |
| 388 | coffsym = (obj_symbols (abfd) \ |
| 389 | + (cache_ptr->sym_ptr_ptr - symbols)); \ |
| 390 | else if (ptr) \ |
| 391 | coffsym = coff_symbol_from (abfd, ptr); \ |
| 392 | if (coffsym != (coff_symbol_type *) NULL \ |
| 393 | && coffsym->native->u.syment.n_scnum == 0) \ |
| 394 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ |
| 395 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ |
| 396 | && ptr->section != (asection *) NULL) \ |
| 397 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ |
| 398 | else \ |
| 399 | cache_ptr->addend = 0; \ |
| 400 | if (ptr && howto_table[reloc.r_type].pc_relative) \ |
| 401 | cache_ptr->addend += asect->vma; \ |
| 402 | } |
| 403 | |
| 404 | /* Convert an rtype to howto for the COFF backend linker. */ |
| 405 | |
| 406 | static reloc_howto_type * |
| 407 | coff_mips_rtype_to_howto (abfd, sec, rel, h, sym, addendp) |
| 408 | bfd *abfd ATTRIBUTE_UNUSED; |
| 409 | asection *sec; |
| 410 | struct internal_reloc *rel; |
| 411 | struct coff_link_hash_entry *h; |
| 412 | struct internal_syment *sym; |
| 413 | bfd_vma *addendp; |
| 414 | { |
| 415 | |
| 416 | reloc_howto_type *howto; |
| 417 | |
| 418 | howto = howto_table + rel->r_type; |
| 419 | |
| 420 | #ifdef COFF_WITH_PE |
| 421 | *addendp = 0; |
| 422 | #endif |
| 423 | |
| 424 | if (howto->pc_relative) |
| 425 | *addendp += sec->vma; |
| 426 | |
| 427 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) |
| 428 | { |
| 429 | /* This is a common symbol. The section contents include the |
| 430 | size (sym->n_value) as an addend. The relocate_section |
| 431 | function will be adding in the final value of the symbol. We |
| 432 | need to subtract out the current size in order to get the |
| 433 | correct result. */ |
| 434 | |
| 435 | BFD_ASSERT (h != NULL); |
| 436 | |
| 437 | #ifndef COFF_WITH_PE |
| 438 | /* I think we *do* want to bypass this. If we don't, I have |
| 439 | seen some data parameters get the wrong relocation address. |
| 440 | If I link two versions with and without this section bypassed |
| 441 | and then do a binary comparison, the addresses which are |
| 442 | different can be looked up in the map. The case in which |
| 443 | this section has been bypassed has addresses which correspond |
| 444 | to values I can find in the map. */ |
| 445 | *addendp -= sym->n_value; |
| 446 | #endif |
| 447 | } |
| 448 | |
| 449 | #ifndef COFF_WITH_PE |
| 450 | /* If the output symbol is common (in which case this must be a |
| 451 | relocatable link), we need to add in the final size of the |
| 452 | common symbol. */ |
| 453 | if (h != NULL && h->root.type == bfd_link_hash_common) |
| 454 | *addendp += h->root.u.c.size; |
| 455 | #endif |
| 456 | |
| 457 | #ifdef COFF_WITH_PE |
| 458 | if (howto->pc_relative) |
| 459 | { |
| 460 | *addendp -= 4; |
| 461 | |
| 462 | /* If the symbol is defined, then the generic code is going to |
| 463 | add back the symbol value in order to cancel out an |
| 464 | adjustment it made to the addend. However, we set the addend |
| 465 | to 0 at the start of this function. We need to adjust here, |
| 466 | to avoid the adjustment the generic code will make. FIXME: |
| 467 | This is getting a bit hackish. */ |
| 468 | if (sym != NULL && sym->n_scnum != 0) |
| 469 | *addendp -= sym->n_value; |
| 470 | } |
| 471 | |
| 472 | if (rel->r_type == MIPS_R_RVA) |
| 473 | { |
| 474 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; |
| 475 | } |
| 476 | #endif |
| 477 | |
| 478 | return howto; |
| 479 | } |
| 480 | |
| 481 | #define coff_rtype_to_howto coff_mips_rtype_to_howto |
| 482 | |
| 483 | #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup |
| 484 | |
| 485 | /* Get the howto structure for a generic reloc type. */ |
| 486 | |
| 487 | static reloc_howto_type * |
| 488 | coff_mips_reloc_type_lookup (abfd, code) |
| 489 | bfd *abfd ATTRIBUTE_UNUSED; |
| 490 | bfd_reloc_code_real_type code; |
| 491 | { |
| 492 | int mips_type; |
| 493 | |
| 494 | switch (code) |
| 495 | { |
| 496 | case BFD_RELOC_16: |
| 497 | mips_type = MIPS_R_REFHALF; |
| 498 | break; |
| 499 | case BFD_RELOC_32: |
| 500 | case BFD_RELOC_CTOR: |
| 501 | mips_type = MIPS_R_REFWORD; |
| 502 | break; |
| 503 | case BFD_RELOC_MIPS_JMP: |
| 504 | mips_type = MIPS_R_JMPADDR; |
| 505 | break; |
| 506 | case BFD_RELOC_HI16_S: |
| 507 | mips_type = MIPS_R_REFHI; |
| 508 | break; |
| 509 | case BFD_RELOC_LO16: |
| 510 | mips_type = MIPS_R_REFLO; |
| 511 | break; |
| 512 | case BFD_RELOC_GPREL16: |
| 513 | mips_type = MIPS_R_GPREL; |
| 514 | break; |
| 515 | case BFD_RELOC_MIPS_LITERAL: |
| 516 | mips_type = MIPS_R_LITERAL; |
| 517 | break; |
| 518 | case BFD_RELOC_RVA: |
| 519 | mips_type = MIPS_R_RVA; |
| 520 | break; |
| 521 | default: |
| 522 | return (reloc_howto_type *) NULL; |
| 523 | } |
| 524 | |
| 525 | return &howto_table[mips_type]; |
| 526 | } |
| 527 | |
| 528 | static void |
| 529 | mips_swap_reloc_in (abfd, src, dst) |
| 530 | bfd *abfd; |
| 531 | PTR src; |
| 532 | PTR dst; |
| 533 | { |
| 534 | static struct internal_reloc pair_prev; |
| 535 | RELOC *reloc_src = (RELOC *) src; |
| 536 | struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; |
| 537 | |
| 538 | reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); |
| 539 | reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); |
| 540 | reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); |
| 541 | reloc_dst->r_size = 0; |
| 542 | reloc_dst->r_extern = 0; |
| 543 | reloc_dst->r_offset = 0; |
| 544 | |
| 545 | switch (reloc_dst->r_type) |
| 546 | { |
| 547 | case MIPS_R_REFHI: |
| 548 | pair_prev = *reloc_dst; |
| 549 | break; |
| 550 | case MIPS_R_PAIR: |
| 551 | reloc_dst->r_offset = reloc_dst->r_symndx; |
| 552 | if (reloc_dst->r_offset & 0x8000) |
| 553 | reloc_dst->r_offset -= 0x10000; |
| 554 | /*printf ("dj: pair offset is %08x\n", reloc_dst->r_offset);*/ |
| 555 | reloc_dst->r_symndx = pair_prev.r_symndx; |
| 556 | break; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static unsigned int |
| 561 | mips_swap_reloc_out (abfd, src, dst) |
| 562 | bfd *abfd; |
| 563 | PTR src; |
| 564 | PTR dst; |
| 565 | { |
| 566 | static int prev_offset = 1; |
| 567 | static bfd_vma prev_addr = 0; |
| 568 | struct internal_reloc *reloc_src = (struct internal_reloc *)src; |
| 569 | struct external_reloc *reloc_dst = (struct external_reloc *)dst; |
| 570 | |
| 571 | switch (reloc_src->r_type) |
| 572 | { |
| 573 | case MIPS_R_REFHI: |
| 574 | prev_addr = reloc_src->r_vaddr; |
| 575 | prev_offset = reloc_src->r_offset; |
| 576 | break; |
| 577 | case MIPS_R_REFLO: |
| 578 | if (reloc_src->r_vaddr == prev_addr) |
| 579 | { |
| 580 | /* FIXME: only slightly hackish. If we see a REFLO pointing to |
| 581 | the same address as a REFHI, we assume this is the matching |
| 582 | PAIR reloc and output it accordingly. The symndx is really |
| 583 | the low 16 bits of the addend */ |
| 584 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
| 585 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); |
| 586 | H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type); |
| 587 | return RELSZ; |
| 588 | } |
| 589 | break; |
| 590 | } |
| 591 | |
| 592 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
| 593 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); |
| 594 | |
| 595 | H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); |
| 596 | return RELSZ; |
| 597 | } |
| 598 | |
| 599 | #define coff_swap_reloc_in mips_swap_reloc_in |
| 600 | #define coff_swap_reloc_out mips_swap_reloc_out |
| 601 | #define NO_COFF_RELOCS |
| 602 | |
| 603 | static bfd_boolean |
| 604 | coff_pe_mips_relocate_section (output_bfd, info, input_bfd, |
| 605 | input_section, contents, relocs, syms, |
| 606 | sections) |
| 607 | bfd *output_bfd; |
| 608 | struct bfd_link_info *info; |
| 609 | bfd *input_bfd; |
| 610 | asection *input_section; |
| 611 | bfd_byte *contents; |
| 612 | struct internal_reloc *relocs; |
| 613 | struct internal_syment *syms; |
| 614 | asection **sections; |
| 615 | { |
| 616 | bfd_vma gp; |
| 617 | bfd_boolean gp_undefined; |
| 618 | size_t adjust; |
| 619 | struct internal_reloc *rel; |
| 620 | struct internal_reloc *rel_end; |
| 621 | unsigned int i; |
| 622 | bfd_boolean got_lo; |
| 623 | |
| 624 | if (info->relocatable) |
| 625 | { |
| 626 | (*_bfd_error_handler) |
| 627 | (_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd); |
| 628 | bfd_set_error (bfd_error_bad_value); |
| 629 | return FALSE; |
| 630 | } |
| 631 | |
| 632 | BFD_ASSERT (input_bfd->xvec->byteorder |
| 633 | == output_bfd->xvec->byteorder); |
| 634 | |
| 635 | gp = _bfd_get_gp_value (output_bfd); |
| 636 | if (gp == 0) |
| 637 | gp_undefined = TRUE; |
| 638 | else |
| 639 | gp_undefined = FALSE; |
| 640 | |
| 641 | got_lo = FALSE; |
| 642 | |
| 643 | adjust = 0; |
| 644 | |
| 645 | rel = relocs; |
| 646 | rel_end = rel + input_section->reloc_count; |
| 647 | for (i = 0; rel < rel_end; rel++, i++) |
| 648 | { |
| 649 | long symndx; |
| 650 | struct coff_link_hash_entry *h; |
| 651 | struct internal_syment *sym; |
| 652 | bfd_vma addend = 0; |
| 653 | bfd_vma val, tmp, targ, src, low; |
| 654 | reloc_howto_type *howto; |
| 655 | unsigned char *mem = contents + rel->r_vaddr; |
| 656 | |
| 657 | symndx = rel->r_symndx; |
| 658 | |
| 659 | if (symndx == -1) |
| 660 | { |
| 661 | h = NULL; |
| 662 | sym = NULL; |
| 663 | } |
| 664 | else |
| 665 | { |
| 666 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| 667 | sym = syms + symndx; |
| 668 | } |
| 669 | |
| 670 | /* COFF treats common symbols in one of two ways. Either the |
| 671 | size of the symbol is included in the section contents, or it |
| 672 | is not. We assume that the size is not included, and force |
| 673 | the rtype_to_howto function to adjust the addend as needed. */ |
| 674 | |
| 675 | if (sym != NULL && sym->n_scnum != 0) |
| 676 | addend = - sym->n_value; |
| 677 | else |
| 678 | addend = 0; |
| 679 | |
| 680 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
| 681 | sym, &addend); |
| 682 | if (howto == NULL) |
| 683 | return FALSE; |
| 684 | |
| 685 | /* If we are doing a relocatable link, then we can just ignore |
| 686 | a PC relative reloc that is pcrel_offset. It will already |
| 687 | have the correct value. If this is not a relocatable link, |
| 688 | then we should ignore the symbol value. */ |
| 689 | if (howto->pc_relative && howto->pcrel_offset) |
| 690 | { |
| 691 | if (info->relocatable) |
| 692 | continue; |
| 693 | if (sym != NULL && sym->n_scnum != 0) |
| 694 | addend += sym->n_value; |
| 695 | } |
| 696 | |
| 697 | val = 0; |
| 698 | |
| 699 | if (h == NULL) |
| 700 | { |
| 701 | asection *sec; |
| 702 | |
| 703 | if (symndx == -1) |
| 704 | { |
| 705 | sec = bfd_abs_section_ptr; |
| 706 | val = 0; |
| 707 | } |
| 708 | else |
| 709 | { |
| 710 | sec = sections[symndx]; |
| 711 | val = (sec->output_section->vma |
| 712 | + sec->output_offset |
| 713 | + sym->n_value); |
| 714 | if (! obj_pe (input_bfd)) |
| 715 | val -= sec->vma; |
| 716 | } |
| 717 | } |
| 718 | else |
| 719 | { |
| 720 | if (h->root.type == bfd_link_hash_defined |
| 721 | || h->root.type == bfd_link_hash_defweak) |
| 722 | { |
| 723 | asection *sec; |
| 724 | |
| 725 | sec = h->root.u.def.section; |
| 726 | val = (h->root.u.def.value |
| 727 | + sec->output_section->vma |
| 728 | + sec->output_offset); |
| 729 | } |
| 730 | |
| 731 | else if (! info->relocatable) |
| 732 | { |
| 733 | if (! ((*info->callbacks->undefined_symbol) |
| 734 | (info, h->root.root.string, input_bfd, input_section, |
| 735 | rel->r_vaddr - input_section->vma, TRUE))) |
| 736 | return FALSE; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | src = rel->r_vaddr + input_section->output_section->vma |
| 741 | + input_section->output_offset; |
| 742 | |
| 743 | /* OK, at this point the following variables are set up: |
| 744 | src = VMA of the memory we're fixing up |
| 745 | mem = pointer to memory we're fixing up |
| 746 | val = VMA of what we need to refer to |
| 747 | */ |
| 748 | |
| 749 | #define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \ |
| 750 | input_bfd, x); \ |
| 751 | bfd_set_error (bfd_error_bad_value); |
| 752 | |
| 753 | switch (rel->r_type) |
| 754 | { |
| 755 | case MIPS_R_ABSOLUTE: |
| 756 | /* ignore these */ |
| 757 | break; |
| 758 | |
| 759 | case MIPS_R_REFHALF: |
| 760 | UI("refhalf"); |
| 761 | break; |
| 762 | |
| 763 | case MIPS_R_REFWORD: |
| 764 | tmp = bfd_get_32(input_bfd, mem); |
| 765 | /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
| 766 | tmp += val; |
| 767 | bfd_put_32(input_bfd, tmp, mem); |
| 768 | break; |
| 769 | |
| 770 | case MIPS_R_JMPADDR: |
| 771 | tmp = bfd_get_32(input_bfd, mem); |
| 772 | targ = val + (tmp&0x03ffffff)*4; |
| 773 | if ((src & 0xf0000000) != (targ & 0xf0000000)) |
| 774 | { |
| 775 | (*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd); |
| 776 | bfd_set_error (bfd_error_bad_value); |
| 777 | return FALSE; |
| 778 | } |
| 779 | tmp &= 0xfc000000; |
| 780 | tmp |= (targ/4) & 0x3ffffff; |
| 781 | bfd_put_32(input_bfd, tmp, mem); |
| 782 | break; |
| 783 | |
| 784 | case MIPS_R_REFHI: |
| 785 | tmp = bfd_get_32(input_bfd, mem); |
| 786 | switch (rel[1].r_type) |
| 787 | { |
| 788 | case MIPS_R_PAIR: |
| 789 | /* MS PE object */ |
| 790 | targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); |
| 791 | break; |
| 792 | case MIPS_R_REFLO: |
| 793 | /* GNU COFF object */ |
| 794 | low = bfd_get_32(input_bfd, contents + rel[1].r_vaddr); |
| 795 | low &= 0xffff; |
| 796 | if (low & 0x8000) |
| 797 | low -= 0x10000; |
| 798 | targ = val + low + ((tmp & 0xffff) << 16); |
| 799 | break; |
| 800 | default: |
| 801 | (*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"), |
| 802 | input_bfd); |
| 803 | bfd_set_error (bfd_error_bad_value); |
| 804 | return FALSE; |
| 805 | } |
| 806 | tmp &= 0xffff0000; |
| 807 | tmp |= (targ >> 16) & 0xffff; |
| 808 | bfd_put_32(input_bfd, tmp, mem); |
| 809 | break; |
| 810 | |
| 811 | case MIPS_R_REFLO: |
| 812 | tmp = bfd_get_32(input_bfd, mem); |
| 813 | targ = val + (tmp & 0xffff); |
| 814 | /* printf ("refword: src=%08x targ=%08x\n", src, targ); */ |
| 815 | tmp &= 0xffff0000; |
| 816 | tmp |= targ & 0xffff; |
| 817 | bfd_put_32(input_bfd, tmp, mem); |
| 818 | break; |
| 819 | |
| 820 | case MIPS_R_GPREL: |
| 821 | case MIPS_R_LITERAL: |
| 822 | UI("gprel"); |
| 823 | break; |
| 824 | |
| 825 | case MIPS_R_SECTION: |
| 826 | UI("section"); |
| 827 | break; |
| 828 | |
| 829 | case MIPS_R_SECREL: |
| 830 | UI("secrel"); |
| 831 | break; |
| 832 | |
| 833 | case MIPS_R_SECRELLO: |
| 834 | UI("secrello"); |
| 835 | break; |
| 836 | |
| 837 | case MIPS_R_SECRELHI: |
| 838 | UI("secrelhi"); |
| 839 | break; |
| 840 | |
| 841 | case MIPS_R_RVA: |
| 842 | tmp = bfd_get_32 (input_bfd, mem); |
| 843 | /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
| 844 | tmp += val |
| 845 | - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
| 846 | bfd_put_32 (input_bfd, tmp, mem); |
| 847 | break; |
| 848 | |
| 849 | case MIPS_R_PAIR: |
| 850 | /* ignore these */ |
| 851 | break; |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | return TRUE; |
| 856 | } |
| 857 | |
| 858 | #define coff_relocate_section coff_pe_mips_relocate_section |
| 859 | |
| 860 | #ifdef TARGET_UNDERSCORE |
| 861 | |
| 862 | /* If mips gcc uses underscores for symbol names, then it does not use |
| 863 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined |
| 864 | we treat all symbols starting with L as local. */ |
| 865 | |
| 866 | static bfd_boolean coff_mips_is_local_label_name |
| 867 | PARAMS ((bfd *, const char *)); |
| 868 | |
| 869 | static bfd_boolean |
| 870 | coff_mips_is_local_label_name (abfd, name) |
| 871 | bfd *abfd; |
| 872 | const char *name; |
| 873 | { |
| 874 | if (name[0] == 'L') |
| 875 | return TRUE; |
| 876 | |
| 877 | return _bfd_coff_is_local_label_name (abfd, name); |
| 878 | } |
| 879 | |
| 880 | #define coff_bfd_is_local_label_name coff_mips_is_local_label_name |
| 881 | |
| 882 | #endif /* TARGET_UNDERSCORE */ |
| 883 | |
| 884 | #define COFF_NO_HACK_SCNHDR_SIZE |
| 885 | |
| 886 | #include "coffcode.h" |
| 887 | |
| 888 | const bfd_target |
| 889 | #ifdef TARGET_SYM |
| 890 | TARGET_SYM = |
| 891 | #else |
| 892 | mipslpe_vec = |
| 893 | #endif |
| 894 | { |
| 895 | #ifdef TARGET_NAME |
| 896 | TARGET_NAME, |
| 897 | #else |
| 898 | "pe-mips", /* name */ |
| 899 | #endif |
| 900 | bfd_target_coff_flavour, |
| 901 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 902 | BFD_ENDIAN_LITTLE, /* header byte order is little */ |
| 903 | |
| 904 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 905 | HAS_LINENO | HAS_DEBUG | |
| 906 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 907 | |
| 908 | #ifndef COFF_WITH_PE |
| 909 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
| 910 | | SEC_CODE | SEC_DATA), |
| 911 | #else |
| 912 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
| 913 | | SEC_CODE | SEC_DATA |
| 914 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), |
| 915 | #endif |
| 916 | |
| 917 | #ifdef TARGET_UNDERSCORE |
| 918 | TARGET_UNDERSCORE, /* leading underscore */ |
| 919 | #else |
| 920 | 0, /* leading underscore */ |
| 921 | #endif |
| 922 | '/', /* ar_pad_char */ |
| 923 | 15, /* ar_max_namelen */ |
| 924 | |
| 925 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 926 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 927 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 928 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 929 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 930 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 931 | |
| 932 | /* Note that we allow an object file to be treated as a core file as well. */ |
| 933 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 934 | bfd_generic_archive_p, coff_object_p}, |
| 935 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
| 936 | bfd_false}, |
| 937 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 938 | _bfd_write_archive_contents, bfd_false}, |
| 939 | |
| 940 | BFD_JUMP_TABLE_GENERIC (coff), |
| 941 | BFD_JUMP_TABLE_COPY (coff), |
| 942 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 943 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 944 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 945 | BFD_JUMP_TABLE_RELOCS (coff), |
| 946 | BFD_JUMP_TABLE_WRITE (coff), |
| 947 | BFD_JUMP_TABLE_LINK (coff), |
| 948 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 949 | |
| 950 | NULL, |
| 951 | |
| 952 | COFF_SWAP_TABLE |
| 953 | }; |