| 1 | /* BFD back-end for ALPHA Extended-Coff files. |
| 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 3 | Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and |
| 4 | Ian Lance Taylor <ian@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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include "bfd.h" |
| 25 | #include "bfdlink.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "coff/internal.h" |
| 28 | #include "coff/sym.h" |
| 29 | #include "coff/symconst.h" |
| 30 | #include "coff/ecoff.h" |
| 31 | #include "coff/alpha.h" |
| 32 | #include "aout/ar.h" |
| 33 | #include "libcoff.h" |
| 34 | #include "libecoff.h" |
| 35 | \f |
| 36 | /* Prototypes for static functions. */ |
| 37 | |
| 38 | |
| 39 | \f |
| 40 | /* ECOFF has COFF sections, but the debugging information is stored in |
| 41 | a completely different format. ECOFF targets use some of the |
| 42 | swapping routines from coffswap.h, and some of the generic COFF |
| 43 | routines in coffgen.c, but, unlike the real COFF targets, do not |
| 44 | use coffcode.h itself. |
| 45 | |
| 46 | Get the generic COFF swapping routines, except for the reloc, |
| 47 | symbol, and lineno ones. Give them ecoff names. Define some |
| 48 | accessor macros for the large sizes used for Alpha ECOFF. */ |
| 49 | |
| 50 | #define GET_FILEHDR_SYMPTR H_GET_64 |
| 51 | #define PUT_FILEHDR_SYMPTR H_PUT_64 |
| 52 | #define GET_AOUTHDR_TSIZE H_GET_64 |
| 53 | #define PUT_AOUTHDR_TSIZE H_PUT_64 |
| 54 | #define GET_AOUTHDR_DSIZE H_GET_64 |
| 55 | #define PUT_AOUTHDR_DSIZE H_PUT_64 |
| 56 | #define GET_AOUTHDR_BSIZE H_GET_64 |
| 57 | #define PUT_AOUTHDR_BSIZE H_PUT_64 |
| 58 | #define GET_AOUTHDR_ENTRY H_GET_64 |
| 59 | #define PUT_AOUTHDR_ENTRY H_PUT_64 |
| 60 | #define GET_AOUTHDR_TEXT_START H_GET_64 |
| 61 | #define PUT_AOUTHDR_TEXT_START H_PUT_64 |
| 62 | #define GET_AOUTHDR_DATA_START H_GET_64 |
| 63 | #define PUT_AOUTHDR_DATA_START H_PUT_64 |
| 64 | #define GET_SCNHDR_PADDR H_GET_64 |
| 65 | #define PUT_SCNHDR_PADDR H_PUT_64 |
| 66 | #define GET_SCNHDR_VADDR H_GET_64 |
| 67 | #define PUT_SCNHDR_VADDR H_PUT_64 |
| 68 | #define GET_SCNHDR_SIZE H_GET_64 |
| 69 | #define PUT_SCNHDR_SIZE H_PUT_64 |
| 70 | #define GET_SCNHDR_SCNPTR H_GET_64 |
| 71 | #define PUT_SCNHDR_SCNPTR H_PUT_64 |
| 72 | #define GET_SCNHDR_RELPTR H_GET_64 |
| 73 | #define PUT_SCNHDR_RELPTR H_PUT_64 |
| 74 | #define GET_SCNHDR_LNNOPTR H_GET_64 |
| 75 | #define PUT_SCNHDR_LNNOPTR H_PUT_64 |
| 76 | |
| 77 | #define ALPHAECOFF |
| 78 | |
| 79 | #define NO_COFF_RELOCS |
| 80 | #define NO_COFF_SYMBOLS |
| 81 | #define NO_COFF_LINENOS |
| 82 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in |
| 83 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out |
| 84 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in |
| 85 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out |
| 86 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in |
| 87 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out |
| 88 | #include "coffswap.h" |
| 89 | |
| 90 | /* Get the ECOFF swapping routines. */ |
| 91 | #define ECOFF_64 |
| 92 | #include "ecoffswap.h" |
| 93 | \f |
| 94 | /* How to process the various reloc types. */ |
| 95 | |
| 96 | static bfd_reloc_status_type |
| 97 | reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, |
| 98 | arelent *reloc ATTRIBUTE_UNUSED, |
| 99 | asymbol *sym ATTRIBUTE_UNUSED, |
| 100 | void * data ATTRIBUTE_UNUSED, |
| 101 | asection *sec ATTRIBUTE_UNUSED, |
| 102 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 103 | char **error_message ATTRIBUTE_UNUSED) |
| 104 | { |
| 105 | return bfd_reloc_ok; |
| 106 | } |
| 107 | |
| 108 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 109 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 110 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 111 | |
| 112 | static reloc_howto_type alpha_howto_table[] = |
| 113 | { |
| 114 | /* Reloc type 0 is ignored by itself. However, it appears after a |
| 115 | GPDISP reloc to identify the location where the low order 16 bits |
| 116 | of the gp register are loaded. */ |
| 117 | HOWTO (ALPHA_R_IGNORE, /* type */ |
| 118 | 0, /* rightshift */ |
| 119 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 120 | 8, /* bitsize */ |
| 121 | TRUE, /* pc_relative */ |
| 122 | 0, /* bitpos */ |
| 123 | complain_overflow_dont, /* complain_on_overflow */ |
| 124 | reloc_nil, /* special_function */ |
| 125 | "IGNORE", /* name */ |
| 126 | TRUE, /* partial_inplace */ |
| 127 | 0, /* src_mask */ |
| 128 | 0, /* dst_mask */ |
| 129 | TRUE), /* pcrel_offset */ |
| 130 | |
| 131 | /* A 32 bit reference to a symbol. */ |
| 132 | HOWTO (ALPHA_R_REFLONG, /* type */ |
| 133 | 0, /* rightshift */ |
| 134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 32, /* bitsize */ |
| 136 | FALSE, /* pc_relative */ |
| 137 | 0, /* bitpos */ |
| 138 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 139 | 0, /* special_function */ |
| 140 | "REFLONG", /* name */ |
| 141 | TRUE, /* partial_inplace */ |
| 142 | 0xffffffff, /* src_mask */ |
| 143 | 0xffffffff, /* dst_mask */ |
| 144 | FALSE), /* pcrel_offset */ |
| 145 | |
| 146 | /* A 64 bit reference to a symbol. */ |
| 147 | HOWTO (ALPHA_R_REFQUAD, /* type */ |
| 148 | 0, /* rightshift */ |
| 149 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 150 | 64, /* bitsize */ |
| 151 | FALSE, /* pc_relative */ |
| 152 | 0, /* bitpos */ |
| 153 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 154 | 0, /* special_function */ |
| 155 | "REFQUAD", /* name */ |
| 156 | TRUE, /* partial_inplace */ |
| 157 | MINUS_ONE, /* src_mask */ |
| 158 | MINUS_ONE, /* dst_mask */ |
| 159 | FALSE), /* pcrel_offset */ |
| 160 | |
| 161 | /* A 32 bit GP relative offset. This is just like REFLONG except |
| 162 | that when the value is used the value of the gp register will be |
| 163 | added in. */ |
| 164 | HOWTO (ALPHA_R_GPREL32, /* type */ |
| 165 | 0, /* rightshift */ |
| 166 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 167 | 32, /* bitsize */ |
| 168 | FALSE, /* pc_relative */ |
| 169 | 0, /* bitpos */ |
| 170 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 171 | 0, /* special_function */ |
| 172 | "GPREL32", /* name */ |
| 173 | TRUE, /* partial_inplace */ |
| 174 | 0xffffffff, /* src_mask */ |
| 175 | 0xffffffff, /* dst_mask */ |
| 176 | FALSE), /* pcrel_offset */ |
| 177 | |
| 178 | /* Used for an instruction that refers to memory off the GP |
| 179 | register. The offset is 16 bits of the 32 bit instruction. This |
| 180 | reloc always seems to be against the .lita section. */ |
| 181 | HOWTO (ALPHA_R_LITERAL, /* type */ |
| 182 | 0, /* rightshift */ |
| 183 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 184 | 16, /* bitsize */ |
| 185 | FALSE, /* pc_relative */ |
| 186 | 0, /* bitpos */ |
| 187 | complain_overflow_signed, /* complain_on_overflow */ |
| 188 | 0, /* special_function */ |
| 189 | "LITERAL", /* name */ |
| 190 | TRUE, /* partial_inplace */ |
| 191 | 0xffff, /* src_mask */ |
| 192 | 0xffff, /* dst_mask */ |
| 193 | FALSE), /* pcrel_offset */ |
| 194 | |
| 195 | /* This reloc only appears immediately following a LITERAL reloc. |
| 196 | It identifies a use of the literal. It seems that the linker can |
| 197 | use this to eliminate a portion of the .lita section. The symbol |
| 198 | index is special: 1 means the literal address is in the base |
| 199 | register of a memory format instruction; 2 means the literal |
| 200 | address is in the byte offset register of a byte-manipulation |
| 201 | instruction; 3 means the literal address is in the target |
| 202 | register of a jsr instruction. This does not actually do any |
| 203 | relocation. */ |
| 204 | HOWTO (ALPHA_R_LITUSE, /* type */ |
| 205 | 0, /* rightshift */ |
| 206 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 207 | 32, /* bitsize */ |
| 208 | FALSE, /* pc_relative */ |
| 209 | 0, /* bitpos */ |
| 210 | complain_overflow_dont, /* complain_on_overflow */ |
| 211 | reloc_nil, /* special_function */ |
| 212 | "LITUSE", /* name */ |
| 213 | FALSE, /* partial_inplace */ |
| 214 | 0, /* src_mask */ |
| 215 | 0, /* dst_mask */ |
| 216 | FALSE), /* pcrel_offset */ |
| 217 | |
| 218 | /* Load the gp register. This is always used for a ldah instruction |
| 219 | which loads the upper 16 bits of the gp register. The next reloc |
| 220 | will be an IGNORE reloc which identifies the location of the lda |
| 221 | instruction which loads the lower 16 bits. The symbol index of |
| 222 | the GPDISP instruction appears to actually be the number of bytes |
| 223 | between the ldah and lda instructions. This gives two different |
| 224 | ways to determine where the lda instruction is; I don't know why |
| 225 | both are used. The value to use for the relocation is the |
| 226 | difference between the GP value and the current location; the |
| 227 | load will always be done against a register holding the current |
| 228 | address. */ |
| 229 | HOWTO (ALPHA_R_GPDISP, /* type */ |
| 230 | 16, /* rightshift */ |
| 231 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 232 | 16, /* bitsize */ |
| 233 | TRUE, /* pc_relative */ |
| 234 | 0, /* bitpos */ |
| 235 | complain_overflow_dont, /* complain_on_overflow */ |
| 236 | reloc_nil, /* special_function */ |
| 237 | "GPDISP", /* name */ |
| 238 | TRUE, /* partial_inplace */ |
| 239 | 0xffff, /* src_mask */ |
| 240 | 0xffff, /* dst_mask */ |
| 241 | TRUE), /* pcrel_offset */ |
| 242 | |
| 243 | /* A 21 bit branch. The native assembler generates these for |
| 244 | branches within the text segment, and also fills in the PC |
| 245 | relative offset in the instruction. */ |
| 246 | HOWTO (ALPHA_R_BRADDR, /* type */ |
| 247 | 2, /* rightshift */ |
| 248 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 249 | 21, /* bitsize */ |
| 250 | TRUE, /* pc_relative */ |
| 251 | 0, /* bitpos */ |
| 252 | complain_overflow_signed, /* complain_on_overflow */ |
| 253 | 0, /* special_function */ |
| 254 | "BRADDR", /* name */ |
| 255 | TRUE, /* partial_inplace */ |
| 256 | 0x1fffff, /* src_mask */ |
| 257 | 0x1fffff, /* dst_mask */ |
| 258 | FALSE), /* pcrel_offset */ |
| 259 | |
| 260 | /* A hint for a jump to a register. */ |
| 261 | HOWTO (ALPHA_R_HINT, /* type */ |
| 262 | 2, /* rightshift */ |
| 263 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 264 | 14, /* bitsize */ |
| 265 | TRUE, /* pc_relative */ |
| 266 | 0, /* bitpos */ |
| 267 | complain_overflow_dont, /* complain_on_overflow */ |
| 268 | 0, /* special_function */ |
| 269 | "HINT", /* name */ |
| 270 | TRUE, /* partial_inplace */ |
| 271 | 0x3fff, /* src_mask */ |
| 272 | 0x3fff, /* dst_mask */ |
| 273 | FALSE), /* pcrel_offset */ |
| 274 | |
| 275 | /* 16 bit PC relative offset. */ |
| 276 | HOWTO (ALPHA_R_SREL16, /* type */ |
| 277 | 0, /* rightshift */ |
| 278 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 279 | 16, /* bitsize */ |
| 280 | TRUE, /* pc_relative */ |
| 281 | 0, /* bitpos */ |
| 282 | complain_overflow_signed, /* complain_on_overflow */ |
| 283 | 0, /* special_function */ |
| 284 | "SREL16", /* name */ |
| 285 | TRUE, /* partial_inplace */ |
| 286 | 0xffff, /* src_mask */ |
| 287 | 0xffff, /* dst_mask */ |
| 288 | FALSE), /* pcrel_offset */ |
| 289 | |
| 290 | /* 32 bit PC relative offset. */ |
| 291 | HOWTO (ALPHA_R_SREL32, /* type */ |
| 292 | 0, /* rightshift */ |
| 293 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 294 | 32, /* bitsize */ |
| 295 | TRUE, /* pc_relative */ |
| 296 | 0, /* bitpos */ |
| 297 | complain_overflow_signed, /* complain_on_overflow */ |
| 298 | 0, /* special_function */ |
| 299 | "SREL32", /* name */ |
| 300 | TRUE, /* partial_inplace */ |
| 301 | 0xffffffff, /* src_mask */ |
| 302 | 0xffffffff, /* dst_mask */ |
| 303 | FALSE), /* pcrel_offset */ |
| 304 | |
| 305 | /* A 64 bit PC relative offset. */ |
| 306 | HOWTO (ALPHA_R_SREL64, /* type */ |
| 307 | 0, /* rightshift */ |
| 308 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 309 | 64, /* bitsize */ |
| 310 | TRUE, /* pc_relative */ |
| 311 | 0, /* bitpos */ |
| 312 | complain_overflow_signed, /* complain_on_overflow */ |
| 313 | 0, /* special_function */ |
| 314 | "SREL64", /* name */ |
| 315 | TRUE, /* partial_inplace */ |
| 316 | MINUS_ONE, /* src_mask */ |
| 317 | MINUS_ONE, /* dst_mask */ |
| 318 | FALSE), /* pcrel_offset */ |
| 319 | |
| 320 | /* Push a value on the reloc evaluation stack. */ |
| 321 | HOWTO (ALPHA_R_OP_PUSH, /* type */ |
| 322 | 0, /* rightshift */ |
| 323 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 324 | 0, /* bitsize */ |
| 325 | FALSE, /* pc_relative */ |
| 326 | 0, /* bitpos */ |
| 327 | complain_overflow_dont, /* complain_on_overflow */ |
| 328 | 0, /* special_function */ |
| 329 | "OP_PUSH", /* name */ |
| 330 | FALSE, /* partial_inplace */ |
| 331 | 0, /* src_mask */ |
| 332 | 0, /* dst_mask */ |
| 333 | FALSE), /* pcrel_offset */ |
| 334 | |
| 335 | /* Store the value from the stack at the given address. Store it in |
| 336 | a bitfield of size r_size starting at bit position r_offset. */ |
| 337 | HOWTO (ALPHA_R_OP_STORE, /* type */ |
| 338 | 0, /* rightshift */ |
| 339 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 64, /* bitsize */ |
| 341 | FALSE, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_dont, /* complain_on_overflow */ |
| 344 | 0, /* special_function */ |
| 345 | "OP_STORE", /* name */ |
| 346 | FALSE, /* partial_inplace */ |
| 347 | 0, /* src_mask */ |
| 348 | MINUS_ONE, /* dst_mask */ |
| 349 | FALSE), /* pcrel_offset */ |
| 350 | |
| 351 | /* Subtract the reloc address from the value on the top of the |
| 352 | relocation stack. */ |
| 353 | HOWTO (ALPHA_R_OP_PSUB, /* type */ |
| 354 | 0, /* rightshift */ |
| 355 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 356 | 0, /* bitsize */ |
| 357 | FALSE, /* pc_relative */ |
| 358 | 0, /* bitpos */ |
| 359 | complain_overflow_dont, /* complain_on_overflow */ |
| 360 | 0, /* special_function */ |
| 361 | "OP_PSUB", /* name */ |
| 362 | FALSE, /* partial_inplace */ |
| 363 | 0, /* src_mask */ |
| 364 | 0, /* dst_mask */ |
| 365 | FALSE), /* pcrel_offset */ |
| 366 | |
| 367 | /* Shift the value on the top of the relocation stack right by the |
| 368 | given value. */ |
| 369 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ |
| 370 | 0, /* rightshift */ |
| 371 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 372 | 0, /* bitsize */ |
| 373 | FALSE, /* pc_relative */ |
| 374 | 0, /* bitpos */ |
| 375 | complain_overflow_dont, /* complain_on_overflow */ |
| 376 | 0, /* special_function */ |
| 377 | "OP_PRSHIFT", /* name */ |
| 378 | FALSE, /* partial_inplace */ |
| 379 | 0, /* src_mask */ |
| 380 | 0, /* dst_mask */ |
| 381 | FALSE), /* pcrel_offset */ |
| 382 | |
| 383 | /* Adjust the GP value for a new range in the object file. */ |
| 384 | HOWTO (ALPHA_R_GPVALUE, /* type */ |
| 385 | 0, /* rightshift */ |
| 386 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 387 | 0, /* bitsize */ |
| 388 | FALSE, /* pc_relative */ |
| 389 | 0, /* bitpos */ |
| 390 | complain_overflow_dont, /* complain_on_overflow */ |
| 391 | 0, /* special_function */ |
| 392 | "GPVALUE", /* name */ |
| 393 | FALSE, /* partial_inplace */ |
| 394 | 0, /* src_mask */ |
| 395 | 0, /* dst_mask */ |
| 396 | FALSE) /* pcrel_offset */ |
| 397 | }; |
| 398 | \f |
| 399 | /* Recognize an Alpha ECOFF file. */ |
| 400 | |
| 401 | static const bfd_target * |
| 402 | alpha_ecoff_object_p (bfd *abfd) |
| 403 | { |
| 404 | static const bfd_target *ret; |
| 405 | |
| 406 | ret = coff_object_p (abfd); |
| 407 | |
| 408 | if (ret != NULL) |
| 409 | { |
| 410 | asection *sec; |
| 411 | |
| 412 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the |
| 413 | .pdata section is the number of entries it contains. Each |
| 414 | entry takes up 8 bytes. The number of entries is required |
| 415 | since the section is aligned to a 16 byte boundary. When we |
| 416 | link .pdata sections together, we do not want to include the |
| 417 | alignment bytes. We handle this on input by faking the size |
| 418 | of the .pdata section to remove the unwanted alignment bytes. |
| 419 | On output we will set the lnnoptr field and force the |
| 420 | alignment. */ |
| 421 | sec = bfd_get_section_by_name (abfd, _PDATA); |
| 422 | if (sec != (asection *) NULL) |
| 423 | { |
| 424 | bfd_size_type size; |
| 425 | |
| 426 | size = sec->line_filepos * 8; |
| 427 | BFD_ASSERT (size == sec->size |
| 428 | || size + 8 == sec->size); |
| 429 | if (! bfd_set_section_size (abfd, sec, size)) |
| 430 | return NULL; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | /* See whether the magic number matches. */ |
| 438 | |
| 439 | static bfd_boolean |
| 440 | alpha_ecoff_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 441 | void * filehdr) |
| 442 | { |
| 443 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; |
| 444 | |
| 445 | if (! ALPHA_ECOFF_BADMAG (*internal_f)) |
| 446 | return TRUE; |
| 447 | |
| 448 | if (ALPHA_ECOFF_COMPRESSEDMAG (*internal_f)) |
| 449 | (*_bfd_error_handler) |
| 450 | (_("%B: Cannot handle compressed Alpha binaries.\n" |
| 451 | " Use compiler flags, or objZ, to generate uncompressed binaries."), |
| 452 | abfd); |
| 453 | |
| 454 | return FALSE; |
| 455 | } |
| 456 | |
| 457 | /* This is a hook called by coff_real_object_p to create any backend |
| 458 | specific information. */ |
| 459 | |
| 460 | static void * |
| 461 | alpha_ecoff_mkobject_hook (bfd *abfd, void * filehdr, void * aouthdr) |
| 462 | { |
| 463 | void * ecoff; |
| 464 | |
| 465 | ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr); |
| 466 | |
| 467 | if (ecoff != NULL) |
| 468 | { |
| 469 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; |
| 470 | |
| 471 | /* Set additional BFD flags according to the object type from the |
| 472 | machine specific file header flags. */ |
| 473 | switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK) |
| 474 | { |
| 475 | case F_ALPHA_SHARABLE: |
| 476 | abfd->flags |= DYNAMIC; |
| 477 | break; |
| 478 | case F_ALPHA_CALL_SHARED: |
| 479 | /* Always executable if using shared libraries as the run time |
| 480 | loader might resolve undefined references. */ |
| 481 | abfd->flags |= (DYNAMIC | EXEC_P); |
| 482 | break; |
| 483 | } |
| 484 | } |
| 485 | return ecoff; |
| 486 | } |
| 487 | \f |
| 488 | /* Reloc handling. */ |
| 489 | |
| 490 | /* Swap a reloc in. */ |
| 491 | |
| 492 | static void |
| 493 | alpha_ecoff_swap_reloc_in (bfd *abfd, |
| 494 | void * ext_ptr, |
| 495 | struct internal_reloc *intern) |
| 496 | { |
| 497 | const RELOC *ext = (RELOC *) ext_ptr; |
| 498 | |
| 499 | intern->r_vaddr = H_GET_64 (abfd, ext->r_vaddr); |
| 500 | intern->r_symndx = H_GET_32 (abfd, ext->r_symndx); |
| 501 | |
| 502 | BFD_ASSERT (bfd_header_little_endian (abfd)); |
| 503 | |
| 504 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) |
| 505 | >> RELOC_BITS0_TYPE_SH_LITTLE); |
| 506 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; |
| 507 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) |
| 508 | >> RELOC_BITS1_OFFSET_SH_LITTLE); |
| 509 | /* Ignored the reserved bits. */ |
| 510 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) |
| 511 | >> RELOC_BITS3_SIZE_SH_LITTLE); |
| 512 | |
| 513 | if (intern->r_type == ALPHA_R_LITUSE |
| 514 | || intern->r_type == ALPHA_R_GPDISP) |
| 515 | { |
| 516 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx |
| 517 | value is not actually a symbol index, but is instead a |
| 518 | special code. We put the code in the r_size field, and |
| 519 | clobber the symndx. */ |
| 520 | if (intern->r_size != 0) |
| 521 | abort (); |
| 522 | intern->r_size = intern->r_symndx; |
| 523 | intern->r_symndx = RELOC_SECTION_NONE; |
| 524 | } |
| 525 | else if (intern->r_type == ALPHA_R_IGNORE) |
| 526 | { |
| 527 | /* The IGNORE reloc generally follows a GPDISP reloc, and is |
| 528 | against the .lita section. The section is irrelevant. */ |
| 529 | if (! intern->r_extern && |
| 530 | intern->r_symndx == RELOC_SECTION_ABS) |
| 531 | abort (); |
| 532 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) |
| 533 | intern->r_symndx = RELOC_SECTION_ABS; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | /* Swap a reloc out. */ |
| 538 | |
| 539 | static void |
| 540 | alpha_ecoff_swap_reloc_out (bfd *abfd, |
| 541 | const struct internal_reloc *intern, |
| 542 | void * dst) |
| 543 | { |
| 544 | RELOC *ext = (RELOC *) dst; |
| 545 | long symndx; |
| 546 | unsigned char size; |
| 547 | |
| 548 | /* Undo the hackery done in swap_reloc_in. */ |
| 549 | if (intern->r_type == ALPHA_R_LITUSE |
| 550 | || intern->r_type == ALPHA_R_GPDISP) |
| 551 | { |
| 552 | symndx = intern->r_size; |
| 553 | size = 0; |
| 554 | } |
| 555 | else if (intern->r_type == ALPHA_R_IGNORE |
| 556 | && ! intern->r_extern |
| 557 | && intern->r_symndx == RELOC_SECTION_ABS) |
| 558 | { |
| 559 | symndx = RELOC_SECTION_LITA; |
| 560 | size = intern->r_size; |
| 561 | } |
| 562 | else |
| 563 | { |
| 564 | symndx = intern->r_symndx; |
| 565 | size = intern->r_size; |
| 566 | } |
| 567 | |
| 568 | /* XXX FIXME: The maximum symndx value used to be 14 but this |
| 569 | fails with object files produced by DEC's C++ compiler. |
| 570 | Where does the value 14 (or 15) come from anyway ? */ |
| 571 | BFD_ASSERT (intern->r_extern |
| 572 | || (intern->r_symndx >= 0 && intern->r_symndx <= 15)); |
| 573 | |
| 574 | H_PUT_64 (abfd, intern->r_vaddr, ext->r_vaddr); |
| 575 | H_PUT_32 (abfd, symndx, ext->r_symndx); |
| 576 | |
| 577 | BFD_ASSERT (bfd_header_little_endian (abfd)); |
| 578 | |
| 579 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) |
| 580 | & RELOC_BITS0_TYPE_LITTLE); |
| 581 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) |
| 582 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) |
| 583 | & RELOC_BITS1_OFFSET_LITTLE)); |
| 584 | ext->r_bits[2] = 0; |
| 585 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) |
| 586 | & RELOC_BITS3_SIZE_LITTLE); |
| 587 | } |
| 588 | |
| 589 | /* Finish canonicalizing a reloc. Part of this is generic to all |
| 590 | ECOFF targets, and that part is in ecoff.c. The rest is done in |
| 591 | this backend routine. It must fill in the howto field. */ |
| 592 | |
| 593 | static void |
| 594 | alpha_adjust_reloc_in (bfd *abfd, |
| 595 | const struct internal_reloc *intern, |
| 596 | arelent *rptr) |
| 597 | { |
| 598 | if (intern->r_type > ALPHA_R_GPVALUE) |
| 599 | { |
| 600 | (*_bfd_error_handler) |
| 601 | (_("%B: unknown/unsupported relocation type %d"), |
| 602 | abfd, intern->r_type); |
| 603 | bfd_set_error (bfd_error_bad_value); |
| 604 | rptr->addend = 0; |
| 605 | rptr->howto = NULL; |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | switch (intern->r_type) |
| 610 | { |
| 611 | case ALPHA_R_BRADDR: |
| 612 | case ALPHA_R_SREL16: |
| 613 | case ALPHA_R_SREL32: |
| 614 | case ALPHA_R_SREL64: |
| 615 | /* This relocs appear to be fully resolved when they are against |
| 616 | internal symbols. Against external symbols, BRADDR at least |
| 617 | appears to be resolved against the next instruction. */ |
| 618 | if (! intern->r_extern) |
| 619 | rptr->addend = 0; |
| 620 | else |
| 621 | rptr->addend = - (intern->r_vaddr + 4); |
| 622 | break; |
| 623 | |
| 624 | case ALPHA_R_GPREL32: |
| 625 | case ALPHA_R_LITERAL: |
| 626 | /* Copy the gp value for this object file into the addend, to |
| 627 | ensure that we are not confused by the linker. */ |
| 628 | if (! intern->r_extern) |
| 629 | rptr->addend += ecoff_data (abfd)->gp; |
| 630 | break; |
| 631 | |
| 632 | case ALPHA_R_LITUSE: |
| 633 | case ALPHA_R_GPDISP: |
| 634 | /* The LITUSE and GPDISP relocs do not use a symbol, or an |
| 635 | addend, but they do use a special code. Put this code in the |
| 636 | addend field. */ |
| 637 | rptr->addend = intern->r_size; |
| 638 | break; |
| 639 | |
| 640 | case ALPHA_R_OP_STORE: |
| 641 | /* The STORE reloc needs the size and offset fields. We store |
| 642 | them in the addend. */ |
| 643 | BFD_ASSERT (intern->r_offset <= 256); |
| 644 | rptr->addend = (intern->r_offset << 8) + intern->r_size; |
| 645 | break; |
| 646 | |
| 647 | case ALPHA_R_OP_PUSH: |
| 648 | case ALPHA_R_OP_PSUB: |
| 649 | case ALPHA_R_OP_PRSHIFT: |
| 650 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an |
| 651 | address. I believe that the address supplied is really an |
| 652 | addend. */ |
| 653 | rptr->addend = intern->r_vaddr; |
| 654 | break; |
| 655 | |
| 656 | case ALPHA_R_GPVALUE: |
| 657 | /* Set the addend field to the new GP value. */ |
| 658 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; |
| 659 | break; |
| 660 | |
| 661 | case ALPHA_R_IGNORE: |
| 662 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference |
| 663 | to the absolute section so that the reloc is ignored. For |
| 664 | some reason the address of this reloc type is not adjusted by |
| 665 | the section vma. We record the gp value for this object file |
| 666 | here, for convenience when doing the GPDISP relocation. */ |
| 667 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 668 | rptr->address = intern->r_vaddr; |
| 669 | rptr->addend = ecoff_data (abfd)->gp; |
| 670 | break; |
| 671 | |
| 672 | default: |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | rptr->howto = &alpha_howto_table[intern->r_type]; |
| 677 | } |
| 678 | |
| 679 | /* When writing out a reloc we need to pull some values back out of |
| 680 | the addend field into the reloc. This is roughly the reverse of |
| 681 | alpha_adjust_reloc_in, except that there are several changes we do |
| 682 | not need to undo. */ |
| 683 | |
| 684 | static void |
| 685 | alpha_adjust_reloc_out (bfd *abfd ATTRIBUTE_UNUSED, |
| 686 | const arelent *rel, |
| 687 | struct internal_reloc *intern) |
| 688 | { |
| 689 | switch (intern->r_type) |
| 690 | { |
| 691 | case ALPHA_R_LITUSE: |
| 692 | case ALPHA_R_GPDISP: |
| 693 | intern->r_size = rel->addend; |
| 694 | break; |
| 695 | |
| 696 | case ALPHA_R_OP_STORE: |
| 697 | intern->r_size = rel->addend & 0xff; |
| 698 | intern->r_offset = (rel->addend >> 8) & 0xff; |
| 699 | break; |
| 700 | |
| 701 | case ALPHA_R_OP_PUSH: |
| 702 | case ALPHA_R_OP_PSUB: |
| 703 | case ALPHA_R_OP_PRSHIFT: |
| 704 | intern->r_vaddr = rel->addend; |
| 705 | break; |
| 706 | |
| 707 | case ALPHA_R_IGNORE: |
| 708 | intern->r_vaddr = rel->address; |
| 709 | break; |
| 710 | |
| 711 | default: |
| 712 | break; |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | /* The size of the stack for the relocation evaluator. */ |
| 717 | #define RELOC_STACKSIZE (10) |
| 718 | |
| 719 | /* Alpha ECOFF relocs have a built in expression evaluator as well as |
| 720 | other interdependencies. Rather than use a bunch of special |
| 721 | functions and global variables, we use a single routine to do all |
| 722 | the relocation for a section. I haven't yet worked out how the |
| 723 | assembler is going to handle this. */ |
| 724 | |
| 725 | static bfd_byte * |
| 726 | alpha_ecoff_get_relocated_section_contents (bfd *abfd, |
| 727 | struct bfd_link_info *link_info, |
| 728 | struct bfd_link_order *link_order, |
| 729 | bfd_byte *data, |
| 730 | bfd_boolean relocatable, |
| 731 | asymbol **symbols) |
| 732 | { |
| 733 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 734 | asection *input_section = link_order->u.indirect.section; |
| 735 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 736 | arelent **reloc_vector = NULL; |
| 737 | long reloc_count; |
| 738 | bfd *output_bfd = relocatable ? abfd : (bfd *) NULL; |
| 739 | bfd_vma gp; |
| 740 | bfd_size_type sz; |
| 741 | bfd_boolean gp_undefined; |
| 742 | bfd_vma stack[RELOC_STACKSIZE]; |
| 743 | int tos = 0; |
| 744 | |
| 745 | if (reloc_size < 0) |
| 746 | goto error_return; |
| 747 | reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); |
| 748 | if (reloc_vector == NULL && reloc_size != 0) |
| 749 | goto error_return; |
| 750 | |
| 751 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
| 752 | if (! bfd_get_section_contents (input_bfd, input_section, data, 0, sz)) |
| 753 | goto error_return; |
| 754 | |
| 755 | reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, |
| 756 | reloc_vector, symbols); |
| 757 | if (reloc_count < 0) |
| 758 | goto error_return; |
| 759 | if (reloc_count == 0) |
| 760 | goto successful_return; |
| 761 | |
| 762 | /* Get the GP value for the output BFD. */ |
| 763 | gp_undefined = FALSE; |
| 764 | gp = _bfd_get_gp_value (abfd); |
| 765 | if (gp == 0) |
| 766 | { |
| 767 | if (relocatable) |
| 768 | { |
| 769 | asection *sec; |
| 770 | bfd_vma lo; |
| 771 | |
| 772 | /* Make up a value. */ |
| 773 | lo = (bfd_vma) -1; |
| 774 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
| 775 | { |
| 776 | if (sec->vma < lo |
| 777 | && (strcmp (sec->name, ".sbss") == 0 |
| 778 | || strcmp (sec->name, ".sdata") == 0 |
| 779 | || strcmp (sec->name, ".lit4") == 0 |
| 780 | || strcmp (sec->name, ".lit8") == 0 |
| 781 | || strcmp (sec->name, ".lita") == 0)) |
| 782 | lo = sec->vma; |
| 783 | } |
| 784 | gp = lo + 0x8000; |
| 785 | _bfd_set_gp_value (abfd, gp); |
| 786 | } |
| 787 | else |
| 788 | { |
| 789 | struct bfd_link_hash_entry *h; |
| 790 | |
| 791 | h = bfd_link_hash_lookup (link_info->hash, "_gp", FALSE, FALSE, |
| 792 | TRUE); |
| 793 | if (h == (struct bfd_link_hash_entry *) NULL |
| 794 | || h->type != bfd_link_hash_defined) |
| 795 | gp_undefined = TRUE; |
| 796 | else |
| 797 | { |
| 798 | gp = (h->u.def.value |
| 799 | + h->u.def.section->output_section->vma |
| 800 | + h->u.def.section->output_offset); |
| 801 | _bfd_set_gp_value (abfd, gp); |
| 802 | } |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) |
| 807 | { |
| 808 | arelent *rel; |
| 809 | bfd_reloc_status_type r; |
| 810 | char *err; |
| 811 | |
| 812 | rel = *reloc_vector; |
| 813 | r = bfd_reloc_ok; |
| 814 | switch (rel->howto->type) |
| 815 | { |
| 816 | case ALPHA_R_IGNORE: |
| 817 | rel->address += input_section->output_offset; |
| 818 | break; |
| 819 | |
| 820 | case ALPHA_R_REFLONG: |
| 821 | case ALPHA_R_REFQUAD: |
| 822 | case ALPHA_R_BRADDR: |
| 823 | case ALPHA_R_HINT: |
| 824 | case ALPHA_R_SREL16: |
| 825 | case ALPHA_R_SREL32: |
| 826 | case ALPHA_R_SREL64: |
| 827 | if (relocatable |
| 828 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) |
| 829 | { |
| 830 | rel->address += input_section->output_offset; |
| 831 | break; |
| 832 | } |
| 833 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, |
| 834 | output_bfd, &err); |
| 835 | break; |
| 836 | |
| 837 | case ALPHA_R_GPREL32: |
| 838 | /* This relocation is used in a switch table. It is a 32 |
| 839 | bit offset from the current GP value. We must adjust it |
| 840 | by the different between the original GP value and the |
| 841 | current GP value. The original GP value is stored in the |
| 842 | addend. We adjust the addend and let |
| 843 | bfd_perform_relocation finish the job. */ |
| 844 | rel->addend -= gp; |
| 845 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, |
| 846 | output_bfd, &err); |
| 847 | if (r == bfd_reloc_ok && gp_undefined) |
| 848 | { |
| 849 | r = bfd_reloc_dangerous; |
| 850 | err = (char *) _("GP relative relocation used when GP not defined"); |
| 851 | } |
| 852 | break; |
| 853 | |
| 854 | case ALPHA_R_LITERAL: |
| 855 | /* This is a reference to a literal value, generally |
| 856 | (always?) in the .lita section. This is a 16 bit GP |
| 857 | relative relocation. Sometimes the subsequent reloc is a |
| 858 | LITUSE reloc, which indicates how this reloc is used. |
| 859 | This sometimes permits rewriting the two instructions |
| 860 | referred to by the LITERAL and the LITUSE into different |
| 861 | instructions which do not refer to .lita. This can save |
| 862 | a memory reference, and permits removing a value from |
| 863 | .lita thus saving GP relative space. |
| 864 | |
| 865 | We do not these optimizations. To do them we would need |
| 866 | to arrange to link the .lita section first, so that by |
| 867 | the time we got here we would know the final values to |
| 868 | use. This would not be particularly difficult, but it is |
| 869 | not currently implemented. */ |
| 870 | |
| 871 | { |
| 872 | unsigned long insn; |
| 873 | |
| 874 | /* I believe that the LITERAL reloc will only apply to a |
| 875 | ldq or ldl instruction, so check my assumption. */ |
| 876 | insn = bfd_get_32 (input_bfd, data + rel->address); |
| 877 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 |
| 878 | || ((insn >> 26) & 0x3f) == 0x28); |
| 879 | |
| 880 | rel->addend -= gp; |
| 881 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, |
| 882 | output_bfd, &err); |
| 883 | if (r == bfd_reloc_ok && gp_undefined) |
| 884 | { |
| 885 | r = bfd_reloc_dangerous; |
| 886 | err = |
| 887 | (char *) _("GP relative relocation used when GP not defined"); |
| 888 | } |
| 889 | } |
| 890 | break; |
| 891 | |
| 892 | case ALPHA_R_LITUSE: |
| 893 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It |
| 894 | does not cause anything to happen, itself. */ |
| 895 | rel->address += input_section->output_offset; |
| 896 | break; |
| 897 | |
| 898 | case ALPHA_R_GPDISP: |
| 899 | /* This marks the ldah of an ldah/lda pair which loads the |
| 900 | gp register with the difference of the gp value and the |
| 901 | current location. The second of the pair is r_size bytes |
| 902 | ahead; it used to be marked with an ALPHA_R_IGNORE reloc, |
| 903 | but that no longer happens in OSF/1 3.2. */ |
| 904 | { |
| 905 | unsigned long insn1, insn2; |
| 906 | bfd_vma addend; |
| 907 | |
| 908 | /* Get the two instructions. */ |
| 909 | insn1 = bfd_get_32 (input_bfd, data + rel->address); |
| 910 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); |
| 911 | |
| 912 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ |
| 913 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ |
| 914 | |
| 915 | /* Get the existing addend. We must account for the sign |
| 916 | extension done by lda and ldah. */ |
| 917 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); |
| 918 | if (insn1 & 0x8000) |
| 919 | { |
| 920 | addend -= 0x80000000; |
| 921 | addend -= 0x80000000; |
| 922 | } |
| 923 | if (insn2 & 0x8000) |
| 924 | addend -= 0x10000; |
| 925 | |
| 926 | /* The existing addend includes the different between the |
| 927 | gp of the input BFD and the address in the input BFD. |
| 928 | Subtract this out. */ |
| 929 | addend -= (ecoff_data (input_bfd)->gp |
| 930 | - (input_section->vma + rel->address)); |
| 931 | |
| 932 | /* Now add in the final gp value, and subtract out the |
| 933 | final address. */ |
| 934 | addend += (gp |
| 935 | - (input_section->output_section->vma |
| 936 | + input_section->output_offset |
| 937 | + rel->address)); |
| 938 | |
| 939 | /* Change the instructions, accounting for the sign |
| 940 | extension, and write them out. */ |
| 941 | if (addend & 0x8000) |
| 942 | addend += 0x10000; |
| 943 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); |
| 944 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); |
| 945 | |
| 946 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); |
| 947 | bfd_put_32 (input_bfd, (bfd_vma) insn2, |
| 948 | data + rel->address + rel->addend); |
| 949 | |
| 950 | rel->address += input_section->output_offset; |
| 951 | } |
| 952 | break; |
| 953 | |
| 954 | case ALPHA_R_OP_PUSH: |
| 955 | /* Push a value on the reloc evaluation stack. */ |
| 956 | { |
| 957 | asymbol *symbol; |
| 958 | bfd_vma relocation; |
| 959 | |
| 960 | if (relocatable) |
| 961 | { |
| 962 | rel->address += input_section->output_offset; |
| 963 | break; |
| 964 | } |
| 965 | |
| 966 | /* Figure out the relocation of this symbol. */ |
| 967 | symbol = *rel->sym_ptr_ptr; |
| 968 | |
| 969 | if (bfd_is_und_section (symbol->section)) |
| 970 | r = bfd_reloc_undefined; |
| 971 | |
| 972 | if (bfd_is_com_section (symbol->section)) |
| 973 | relocation = 0; |
| 974 | else |
| 975 | relocation = symbol->value; |
| 976 | relocation += symbol->section->output_section->vma; |
| 977 | relocation += symbol->section->output_offset; |
| 978 | relocation += rel->addend; |
| 979 | |
| 980 | if (tos >= RELOC_STACKSIZE) |
| 981 | abort (); |
| 982 | |
| 983 | stack[tos++] = relocation; |
| 984 | } |
| 985 | break; |
| 986 | |
| 987 | case ALPHA_R_OP_STORE: |
| 988 | /* Store a value from the reloc stack into a bitfield. */ |
| 989 | { |
| 990 | bfd_vma val; |
| 991 | int offset, size; |
| 992 | |
| 993 | if (relocatable) |
| 994 | { |
| 995 | rel->address += input_section->output_offset; |
| 996 | break; |
| 997 | } |
| 998 | |
| 999 | if (tos == 0) |
| 1000 | abort (); |
| 1001 | |
| 1002 | /* The offset and size for this reloc are encoded into the |
| 1003 | addend field by alpha_adjust_reloc_in. */ |
| 1004 | offset = (rel->addend >> 8) & 0xff; |
| 1005 | size = rel->addend & 0xff; |
| 1006 | |
| 1007 | val = bfd_get_64 (abfd, data + rel->address); |
| 1008 | val &=~ (((1 << size) - 1) << offset); |
| 1009 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; |
| 1010 | bfd_put_64 (abfd, val, data + rel->address); |
| 1011 | } |
| 1012 | break; |
| 1013 | |
| 1014 | case ALPHA_R_OP_PSUB: |
| 1015 | /* Subtract a value from the top of the stack. */ |
| 1016 | { |
| 1017 | asymbol *symbol; |
| 1018 | bfd_vma relocation; |
| 1019 | |
| 1020 | if (relocatable) |
| 1021 | { |
| 1022 | rel->address += input_section->output_offset; |
| 1023 | break; |
| 1024 | } |
| 1025 | |
| 1026 | /* Figure out the relocation of this symbol. */ |
| 1027 | symbol = *rel->sym_ptr_ptr; |
| 1028 | |
| 1029 | if (bfd_is_und_section (symbol->section)) |
| 1030 | r = bfd_reloc_undefined; |
| 1031 | |
| 1032 | if (bfd_is_com_section (symbol->section)) |
| 1033 | relocation = 0; |
| 1034 | else |
| 1035 | relocation = symbol->value; |
| 1036 | relocation += symbol->section->output_section->vma; |
| 1037 | relocation += symbol->section->output_offset; |
| 1038 | relocation += rel->addend; |
| 1039 | |
| 1040 | if (tos == 0) |
| 1041 | abort (); |
| 1042 | |
| 1043 | stack[tos - 1] -= relocation; |
| 1044 | } |
| 1045 | break; |
| 1046 | |
| 1047 | case ALPHA_R_OP_PRSHIFT: |
| 1048 | /* Shift the value on the top of the stack. */ |
| 1049 | { |
| 1050 | asymbol *symbol; |
| 1051 | bfd_vma relocation; |
| 1052 | |
| 1053 | if (relocatable) |
| 1054 | { |
| 1055 | rel->address += input_section->output_offset; |
| 1056 | break; |
| 1057 | } |
| 1058 | |
| 1059 | /* Figure out the relocation of this symbol. */ |
| 1060 | symbol = *rel->sym_ptr_ptr; |
| 1061 | |
| 1062 | if (bfd_is_und_section (symbol->section)) |
| 1063 | r = bfd_reloc_undefined; |
| 1064 | |
| 1065 | if (bfd_is_com_section (symbol->section)) |
| 1066 | relocation = 0; |
| 1067 | else |
| 1068 | relocation = symbol->value; |
| 1069 | relocation += symbol->section->output_section->vma; |
| 1070 | relocation += symbol->section->output_offset; |
| 1071 | relocation += rel->addend; |
| 1072 | |
| 1073 | if (tos == 0) |
| 1074 | abort (); |
| 1075 | |
| 1076 | stack[tos - 1] >>= relocation; |
| 1077 | } |
| 1078 | break; |
| 1079 | |
| 1080 | case ALPHA_R_GPVALUE: |
| 1081 | /* I really don't know if this does the right thing. */ |
| 1082 | gp = rel->addend; |
| 1083 | gp_undefined = FALSE; |
| 1084 | break; |
| 1085 | |
| 1086 | default: |
| 1087 | abort (); |
| 1088 | } |
| 1089 | |
| 1090 | if (relocatable) |
| 1091 | { |
| 1092 | asection *os = input_section->output_section; |
| 1093 | |
| 1094 | /* A partial link, so keep the relocs. */ |
| 1095 | os->orelocation[os->reloc_count] = rel; |
| 1096 | os->reloc_count++; |
| 1097 | } |
| 1098 | |
| 1099 | if (r != bfd_reloc_ok) |
| 1100 | { |
| 1101 | switch (r) |
| 1102 | { |
| 1103 | case bfd_reloc_undefined: |
| 1104 | if (! ((*link_info->callbacks->undefined_symbol) |
| 1105 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), |
| 1106 | input_bfd, input_section, rel->address, TRUE))) |
| 1107 | goto error_return; |
| 1108 | break; |
| 1109 | case bfd_reloc_dangerous: |
| 1110 | if (! ((*link_info->callbacks->reloc_dangerous) |
| 1111 | (link_info, err, input_bfd, input_section, |
| 1112 | rel->address))) |
| 1113 | goto error_return; |
| 1114 | break; |
| 1115 | case bfd_reloc_overflow: |
| 1116 | if (! ((*link_info->callbacks->reloc_overflow) |
| 1117 | (link_info, NULL, |
| 1118 | bfd_asymbol_name (*rel->sym_ptr_ptr), |
| 1119 | rel->howto->name, rel->addend, input_bfd, |
| 1120 | input_section, rel->address))) |
| 1121 | goto error_return; |
| 1122 | break; |
| 1123 | case bfd_reloc_outofrange: |
| 1124 | default: |
| 1125 | abort (); |
| 1126 | break; |
| 1127 | } |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | if (tos != 0) |
| 1132 | abort (); |
| 1133 | |
| 1134 | successful_return: |
| 1135 | if (reloc_vector != NULL) |
| 1136 | free (reloc_vector); |
| 1137 | return data; |
| 1138 | |
| 1139 | error_return: |
| 1140 | if (reloc_vector != NULL) |
| 1141 | free (reloc_vector); |
| 1142 | return NULL; |
| 1143 | } |
| 1144 | |
| 1145 | /* Get the howto structure for a generic reloc type. */ |
| 1146 | |
| 1147 | static reloc_howto_type * |
| 1148 | alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1149 | bfd_reloc_code_real_type code) |
| 1150 | { |
| 1151 | int alpha_type; |
| 1152 | |
| 1153 | switch (code) |
| 1154 | { |
| 1155 | case BFD_RELOC_32: |
| 1156 | alpha_type = ALPHA_R_REFLONG; |
| 1157 | break; |
| 1158 | case BFD_RELOC_64: |
| 1159 | case BFD_RELOC_CTOR: |
| 1160 | alpha_type = ALPHA_R_REFQUAD; |
| 1161 | break; |
| 1162 | case BFD_RELOC_GPREL32: |
| 1163 | alpha_type = ALPHA_R_GPREL32; |
| 1164 | break; |
| 1165 | case BFD_RELOC_ALPHA_LITERAL: |
| 1166 | alpha_type = ALPHA_R_LITERAL; |
| 1167 | break; |
| 1168 | case BFD_RELOC_ALPHA_LITUSE: |
| 1169 | alpha_type = ALPHA_R_LITUSE; |
| 1170 | break; |
| 1171 | case BFD_RELOC_ALPHA_GPDISP_HI16: |
| 1172 | alpha_type = ALPHA_R_GPDISP; |
| 1173 | break; |
| 1174 | case BFD_RELOC_ALPHA_GPDISP_LO16: |
| 1175 | alpha_type = ALPHA_R_IGNORE; |
| 1176 | break; |
| 1177 | case BFD_RELOC_23_PCREL_S2: |
| 1178 | alpha_type = ALPHA_R_BRADDR; |
| 1179 | break; |
| 1180 | case BFD_RELOC_ALPHA_HINT: |
| 1181 | alpha_type = ALPHA_R_HINT; |
| 1182 | break; |
| 1183 | case BFD_RELOC_16_PCREL: |
| 1184 | alpha_type = ALPHA_R_SREL16; |
| 1185 | break; |
| 1186 | case BFD_RELOC_32_PCREL: |
| 1187 | alpha_type = ALPHA_R_SREL32; |
| 1188 | break; |
| 1189 | case BFD_RELOC_64_PCREL: |
| 1190 | alpha_type = ALPHA_R_SREL64; |
| 1191 | break; |
| 1192 | default: |
| 1193 | return (reloc_howto_type *) NULL; |
| 1194 | } |
| 1195 | |
| 1196 | return &alpha_howto_table[alpha_type]; |
| 1197 | } |
| 1198 | |
| 1199 | static reloc_howto_type * |
| 1200 | alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1201 | const char *r_name) |
| 1202 | { |
| 1203 | unsigned int i; |
| 1204 | |
| 1205 | for (i = 0; |
| 1206 | i < sizeof (alpha_howto_table) / sizeof (alpha_howto_table[0]); |
| 1207 | i++) |
| 1208 | if (alpha_howto_table[i].name != NULL |
| 1209 | && strcasecmp (alpha_howto_table[i].name, r_name) == 0) |
| 1210 | return &alpha_howto_table[i]; |
| 1211 | |
| 1212 | return NULL; |
| 1213 | } |
| 1214 | \f |
| 1215 | /* A helper routine for alpha_relocate_section which converts an |
| 1216 | external reloc when generating relocatable output. Returns the |
| 1217 | relocation amount. */ |
| 1218 | |
| 1219 | static bfd_vma |
| 1220 | alpha_convert_external_reloc (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 1221 | struct bfd_link_info *info, |
| 1222 | bfd *input_bfd, |
| 1223 | struct external_reloc *ext_rel, |
| 1224 | struct ecoff_link_hash_entry *h) |
| 1225 | { |
| 1226 | unsigned long r_symndx; |
| 1227 | bfd_vma relocation; |
| 1228 | |
| 1229 | BFD_ASSERT (bfd_link_relocatable (info)); |
| 1230 | |
| 1231 | if (h->root.type == bfd_link_hash_defined |
| 1232 | || h->root.type == bfd_link_hash_defweak) |
| 1233 | { |
| 1234 | asection *hsec; |
| 1235 | const char *name; |
| 1236 | |
| 1237 | /* This symbol is defined in the output. Convert the reloc from |
| 1238 | being against the symbol to being against the section. */ |
| 1239 | |
| 1240 | /* Clear the r_extern bit. */ |
| 1241 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; |
| 1242 | |
| 1243 | /* Compute a new r_symndx value. */ |
| 1244 | hsec = h->root.u.def.section; |
| 1245 | name = bfd_get_section_name (output_bfd, hsec->output_section); |
| 1246 | |
| 1247 | r_symndx = (unsigned long) -1; |
| 1248 | switch (name[1]) |
| 1249 | { |
| 1250 | case 'A': |
| 1251 | if (strcmp (name, "*ABS*") == 0) |
| 1252 | r_symndx = RELOC_SECTION_ABS; |
| 1253 | break; |
| 1254 | case 'b': |
| 1255 | if (strcmp (name, ".bss") == 0) |
| 1256 | r_symndx = RELOC_SECTION_BSS; |
| 1257 | break; |
| 1258 | case 'd': |
| 1259 | if (strcmp (name, ".data") == 0) |
| 1260 | r_symndx = RELOC_SECTION_DATA; |
| 1261 | break; |
| 1262 | case 'f': |
| 1263 | if (strcmp (name, ".fini") == 0) |
| 1264 | r_symndx = RELOC_SECTION_FINI; |
| 1265 | break; |
| 1266 | case 'i': |
| 1267 | if (strcmp (name, ".init") == 0) |
| 1268 | r_symndx = RELOC_SECTION_INIT; |
| 1269 | break; |
| 1270 | case 'l': |
| 1271 | if (strcmp (name, ".lita") == 0) |
| 1272 | r_symndx = RELOC_SECTION_LITA; |
| 1273 | else if (strcmp (name, ".lit8") == 0) |
| 1274 | r_symndx = RELOC_SECTION_LIT8; |
| 1275 | else if (strcmp (name, ".lit4") == 0) |
| 1276 | r_symndx = RELOC_SECTION_LIT4; |
| 1277 | break; |
| 1278 | case 'p': |
| 1279 | if (strcmp (name, ".pdata") == 0) |
| 1280 | r_symndx = RELOC_SECTION_PDATA; |
| 1281 | break; |
| 1282 | case 'r': |
| 1283 | if (strcmp (name, ".rdata") == 0) |
| 1284 | r_symndx = RELOC_SECTION_RDATA; |
| 1285 | else if (strcmp (name, ".rconst") == 0) |
| 1286 | r_symndx = RELOC_SECTION_RCONST; |
| 1287 | break; |
| 1288 | case 's': |
| 1289 | if (strcmp (name, ".sdata") == 0) |
| 1290 | r_symndx = RELOC_SECTION_SDATA; |
| 1291 | else if (strcmp (name, ".sbss") == 0) |
| 1292 | r_symndx = RELOC_SECTION_SBSS; |
| 1293 | break; |
| 1294 | case 't': |
| 1295 | if (strcmp (name, ".text") == 0) |
| 1296 | r_symndx = RELOC_SECTION_TEXT; |
| 1297 | break; |
| 1298 | case 'x': |
| 1299 | if (strcmp (name, ".xdata") == 0) |
| 1300 | r_symndx = RELOC_SECTION_XDATA; |
| 1301 | break; |
| 1302 | } |
| 1303 | |
| 1304 | if (r_symndx == (unsigned long) -1) |
| 1305 | abort (); |
| 1306 | |
| 1307 | /* Add the section VMA and the symbol value. */ |
| 1308 | relocation = (h->root.u.def.value |
| 1309 | + hsec->output_section->vma |
| 1310 | + hsec->output_offset); |
| 1311 | } |
| 1312 | else |
| 1313 | { |
| 1314 | /* Change the symndx value to the right one for |
| 1315 | the output BFD. */ |
| 1316 | r_symndx = h->indx; |
| 1317 | if (r_symndx == (unsigned long) -1) |
| 1318 | { |
| 1319 | /* Caller must give an error. */ |
| 1320 | r_symndx = 0; |
| 1321 | } |
| 1322 | relocation = 0; |
| 1323 | } |
| 1324 | |
| 1325 | /* Write out the new r_symndx value. */ |
| 1326 | H_PUT_32 (input_bfd, r_symndx, ext_rel->r_symndx); |
| 1327 | |
| 1328 | return relocation; |
| 1329 | } |
| 1330 | |
| 1331 | /* Relocate a section while linking an Alpha ECOFF file. This is |
| 1332 | quite similar to get_relocated_section_contents. Perhaps they |
| 1333 | could be combined somehow. */ |
| 1334 | |
| 1335 | static bfd_boolean |
| 1336 | alpha_relocate_section (bfd *output_bfd, |
| 1337 | struct bfd_link_info *info, |
| 1338 | bfd *input_bfd, |
| 1339 | asection *input_section, |
| 1340 | bfd_byte *contents, |
| 1341 | void * external_relocs) |
| 1342 | { |
| 1343 | asection **symndx_to_section, *lita_sec; |
| 1344 | struct ecoff_link_hash_entry **sym_hashes; |
| 1345 | bfd_vma gp; |
| 1346 | bfd_boolean gp_undefined; |
| 1347 | bfd_vma stack[RELOC_STACKSIZE]; |
| 1348 | int tos = 0; |
| 1349 | struct external_reloc *ext_rel; |
| 1350 | struct external_reloc *ext_rel_end; |
| 1351 | bfd_size_type amt; |
| 1352 | |
| 1353 | /* We keep a table mapping the symndx found in an internal reloc to |
| 1354 | the appropriate section. This is faster than looking up the |
| 1355 | section by name each time. */ |
| 1356 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; |
| 1357 | if (symndx_to_section == (asection **) NULL) |
| 1358 | { |
| 1359 | amt = NUM_RELOC_SECTIONS * sizeof (asection *); |
| 1360 | symndx_to_section = (asection **) bfd_alloc (input_bfd, amt); |
| 1361 | if (!symndx_to_section) |
| 1362 | return FALSE; |
| 1363 | |
| 1364 | symndx_to_section[RELOC_SECTION_NONE] = NULL; |
| 1365 | symndx_to_section[RELOC_SECTION_TEXT] = |
| 1366 | bfd_get_section_by_name (input_bfd, ".text"); |
| 1367 | symndx_to_section[RELOC_SECTION_RDATA] = |
| 1368 | bfd_get_section_by_name (input_bfd, ".rdata"); |
| 1369 | symndx_to_section[RELOC_SECTION_DATA] = |
| 1370 | bfd_get_section_by_name (input_bfd, ".data"); |
| 1371 | symndx_to_section[RELOC_SECTION_SDATA] = |
| 1372 | bfd_get_section_by_name (input_bfd, ".sdata"); |
| 1373 | symndx_to_section[RELOC_SECTION_SBSS] = |
| 1374 | bfd_get_section_by_name (input_bfd, ".sbss"); |
| 1375 | symndx_to_section[RELOC_SECTION_BSS] = |
| 1376 | bfd_get_section_by_name (input_bfd, ".bss"); |
| 1377 | symndx_to_section[RELOC_SECTION_INIT] = |
| 1378 | bfd_get_section_by_name (input_bfd, ".init"); |
| 1379 | symndx_to_section[RELOC_SECTION_LIT8] = |
| 1380 | bfd_get_section_by_name (input_bfd, ".lit8"); |
| 1381 | symndx_to_section[RELOC_SECTION_LIT4] = |
| 1382 | bfd_get_section_by_name (input_bfd, ".lit4"); |
| 1383 | symndx_to_section[RELOC_SECTION_XDATA] = |
| 1384 | bfd_get_section_by_name (input_bfd, ".xdata"); |
| 1385 | symndx_to_section[RELOC_SECTION_PDATA] = |
| 1386 | bfd_get_section_by_name (input_bfd, ".pdata"); |
| 1387 | symndx_to_section[RELOC_SECTION_FINI] = |
| 1388 | bfd_get_section_by_name (input_bfd, ".fini"); |
| 1389 | symndx_to_section[RELOC_SECTION_LITA] = |
| 1390 | bfd_get_section_by_name (input_bfd, ".lita"); |
| 1391 | symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr; |
| 1392 | symndx_to_section[RELOC_SECTION_RCONST] = |
| 1393 | bfd_get_section_by_name (input_bfd, ".rconst"); |
| 1394 | |
| 1395 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; |
| 1396 | } |
| 1397 | |
| 1398 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; |
| 1399 | |
| 1400 | /* On the Alpha, the .lita section must be addressable by the global |
| 1401 | pointer. To support large programs, we need to allow multiple |
| 1402 | global pointers. This works as long as each input .lita section |
| 1403 | is <64KB big. This implies that when producing relocatable |
| 1404 | output, the .lita section is limited to 64KB. . */ |
| 1405 | |
| 1406 | lita_sec = symndx_to_section[RELOC_SECTION_LITA]; |
| 1407 | gp = _bfd_get_gp_value (output_bfd); |
| 1408 | if (! bfd_link_relocatable (info) && lita_sec != NULL) |
| 1409 | { |
| 1410 | struct ecoff_section_tdata *lita_sec_data; |
| 1411 | |
| 1412 | /* Make sure we have a section data structure to which we can |
| 1413 | hang on to the gp value we pick for the section. */ |
| 1414 | lita_sec_data = ecoff_section_data (input_bfd, lita_sec); |
| 1415 | if (lita_sec_data == NULL) |
| 1416 | { |
| 1417 | amt = sizeof (struct ecoff_section_tdata); |
| 1418 | lita_sec_data = ((struct ecoff_section_tdata *) |
| 1419 | bfd_zalloc (input_bfd, amt)); |
| 1420 | lita_sec->used_by_bfd = lita_sec_data; |
| 1421 | } |
| 1422 | |
| 1423 | if (lita_sec_data->gp != 0) |
| 1424 | { |
| 1425 | /* If we already assigned a gp to this section, we better |
| 1426 | stick with that value. */ |
| 1427 | gp = lita_sec_data->gp; |
| 1428 | } |
| 1429 | else |
| 1430 | { |
| 1431 | bfd_vma lita_vma; |
| 1432 | bfd_size_type lita_size; |
| 1433 | |
| 1434 | lita_vma = lita_sec->output_offset + lita_sec->output_section->vma; |
| 1435 | lita_size = lita_sec->size; |
| 1436 | |
| 1437 | if (gp == 0 |
| 1438 | || lita_vma < gp - 0x8000 |
| 1439 | || lita_vma + lita_size >= gp + 0x8000) |
| 1440 | { |
| 1441 | /* Either gp hasn't been set at all or the current gp |
| 1442 | cannot address this .lita section. In both cases we |
| 1443 | reset the gp to point into the "middle" of the |
| 1444 | current input .lita section. */ |
| 1445 | if (gp && !ecoff_data (output_bfd)->issued_multiple_gp_warning) |
| 1446 | { |
| 1447 | (*info->callbacks->warning) (info, |
| 1448 | _("using multiple gp values"), |
| 1449 | (char *) NULL, output_bfd, |
| 1450 | (asection *) NULL, (bfd_vma) 0); |
| 1451 | ecoff_data (output_bfd)->issued_multiple_gp_warning = TRUE; |
| 1452 | } |
| 1453 | if (lita_vma < gp - 0x8000) |
| 1454 | gp = lita_vma + lita_size - 0x8000; |
| 1455 | else |
| 1456 | gp = lita_vma + 0x8000; |
| 1457 | |
| 1458 | } |
| 1459 | |
| 1460 | lita_sec_data->gp = gp; |
| 1461 | } |
| 1462 | |
| 1463 | _bfd_set_gp_value (output_bfd, gp); |
| 1464 | } |
| 1465 | |
| 1466 | gp_undefined = (gp == 0); |
| 1467 | |
| 1468 | BFD_ASSERT (bfd_header_little_endian (output_bfd)); |
| 1469 | BFD_ASSERT (bfd_header_little_endian (input_bfd)); |
| 1470 | |
| 1471 | ext_rel = (struct external_reloc *) external_relocs; |
| 1472 | ext_rel_end = ext_rel + input_section->reloc_count; |
| 1473 | for (; ext_rel < ext_rel_end; ext_rel++) |
| 1474 | { |
| 1475 | bfd_vma r_vaddr; |
| 1476 | unsigned long r_symndx; |
| 1477 | int r_type; |
| 1478 | int r_extern; |
| 1479 | int r_offset; |
| 1480 | int r_size; |
| 1481 | bfd_boolean relocatep; |
| 1482 | bfd_boolean adjust_addrp; |
| 1483 | bfd_boolean gp_usedp; |
| 1484 | bfd_vma addend; |
| 1485 | |
| 1486 | r_vaddr = H_GET_64 (input_bfd, ext_rel->r_vaddr); |
| 1487 | r_symndx = H_GET_32 (input_bfd, ext_rel->r_symndx); |
| 1488 | |
| 1489 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) |
| 1490 | >> RELOC_BITS0_TYPE_SH_LITTLE); |
| 1491 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; |
| 1492 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) |
| 1493 | >> RELOC_BITS1_OFFSET_SH_LITTLE); |
| 1494 | /* Ignored the reserved bits. */ |
| 1495 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) |
| 1496 | >> RELOC_BITS3_SIZE_SH_LITTLE); |
| 1497 | |
| 1498 | relocatep = FALSE; |
| 1499 | adjust_addrp = TRUE; |
| 1500 | gp_usedp = FALSE; |
| 1501 | addend = 0; |
| 1502 | |
| 1503 | switch (r_type) |
| 1504 | { |
| 1505 | case ALPHA_R_GPRELHIGH: |
| 1506 | (*_bfd_error_handler) |
| 1507 | (_("%B: unsupported relocation: ALPHA_R_GPRELHIGH"), |
| 1508 | input_bfd); |
| 1509 | bfd_set_error (bfd_error_bad_value); |
| 1510 | continue; |
| 1511 | |
| 1512 | case ALPHA_R_GPRELLOW: |
| 1513 | (*_bfd_error_handler) |
| 1514 | (_("%B: unsupported relocation: ALPHA_R_GPRELLOW"), |
| 1515 | input_bfd); |
| 1516 | bfd_set_error (bfd_error_bad_value); |
| 1517 | continue; |
| 1518 | |
| 1519 | default: |
| 1520 | (*_bfd_error_handler) |
| 1521 | (_("%B: unknown relocation type %d"), |
| 1522 | input_bfd, (int) r_type); |
| 1523 | bfd_set_error (bfd_error_bad_value); |
| 1524 | continue; |
| 1525 | |
| 1526 | case ALPHA_R_IGNORE: |
| 1527 | /* This reloc appears after a GPDISP reloc. On earlier |
| 1528 | versions of OSF/1, It marked the position of the second |
| 1529 | instruction to be altered by the GPDISP reloc, but it is |
| 1530 | not otherwise used for anything. For some reason, the |
| 1531 | address of the relocation does not appear to include the |
| 1532 | section VMA, unlike the other relocation types. */ |
| 1533 | if (bfd_link_relocatable (info)) |
| 1534 | H_PUT_64 (input_bfd, input_section->output_offset + r_vaddr, |
| 1535 | ext_rel->r_vaddr); |
| 1536 | adjust_addrp = FALSE; |
| 1537 | break; |
| 1538 | |
| 1539 | case ALPHA_R_REFLONG: |
| 1540 | case ALPHA_R_REFQUAD: |
| 1541 | case ALPHA_R_HINT: |
| 1542 | relocatep = TRUE; |
| 1543 | break; |
| 1544 | |
| 1545 | case ALPHA_R_BRADDR: |
| 1546 | case ALPHA_R_SREL16: |
| 1547 | case ALPHA_R_SREL32: |
| 1548 | case ALPHA_R_SREL64: |
| 1549 | if (r_extern) |
| 1550 | addend += - (r_vaddr + 4); |
| 1551 | relocatep = TRUE; |
| 1552 | break; |
| 1553 | |
| 1554 | case ALPHA_R_GPREL32: |
| 1555 | /* This relocation is used in a switch table. It is a 32 |
| 1556 | bit offset from the current GP value. We must adjust it |
| 1557 | by the different between the original GP value and the |
| 1558 | current GP value. */ |
| 1559 | relocatep = TRUE; |
| 1560 | addend = ecoff_data (input_bfd)->gp - gp; |
| 1561 | gp_usedp = TRUE; |
| 1562 | break; |
| 1563 | |
| 1564 | case ALPHA_R_LITERAL: |
| 1565 | /* This is a reference to a literal value, generally |
| 1566 | (always?) in the .lita section. This is a 16 bit GP |
| 1567 | relative relocation. Sometimes the subsequent reloc is a |
| 1568 | LITUSE reloc, which indicates how this reloc is used. |
| 1569 | This sometimes permits rewriting the two instructions |
| 1570 | referred to by the LITERAL and the LITUSE into different |
| 1571 | instructions which do not refer to .lita. This can save |
| 1572 | a memory reference, and permits removing a value from |
| 1573 | .lita thus saving GP relative space. |
| 1574 | |
| 1575 | We do not these optimizations. To do them we would need |
| 1576 | to arrange to link the .lita section first, so that by |
| 1577 | the time we got here we would know the final values to |
| 1578 | use. This would not be particularly difficult, but it is |
| 1579 | not currently implemented. */ |
| 1580 | |
| 1581 | /* I believe that the LITERAL reloc will only apply to a ldq |
| 1582 | or ldl instruction, so check my assumption. */ |
| 1583 | { |
| 1584 | unsigned long insn; |
| 1585 | |
| 1586 | insn = bfd_get_32 (input_bfd, |
| 1587 | contents + r_vaddr - input_section->vma); |
| 1588 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 |
| 1589 | || ((insn >> 26) & 0x3f) == 0x28); |
| 1590 | } |
| 1591 | |
| 1592 | relocatep = TRUE; |
| 1593 | addend = ecoff_data (input_bfd)->gp - gp; |
| 1594 | gp_usedp = TRUE; |
| 1595 | break; |
| 1596 | |
| 1597 | case ALPHA_R_LITUSE: |
| 1598 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It |
| 1599 | does not cause anything to happen, itself. */ |
| 1600 | break; |
| 1601 | |
| 1602 | case ALPHA_R_GPDISP: |
| 1603 | /* This marks the ldah of an ldah/lda pair which loads the |
| 1604 | gp register with the difference of the gp value and the |
| 1605 | current location. The second of the pair is r_symndx |
| 1606 | bytes ahead. It used to be marked with an ALPHA_R_IGNORE |
| 1607 | reloc, but OSF/1 3.2 no longer does that. */ |
| 1608 | { |
| 1609 | unsigned long insn1, insn2; |
| 1610 | |
| 1611 | /* Get the two instructions. */ |
| 1612 | insn1 = bfd_get_32 (input_bfd, |
| 1613 | contents + r_vaddr - input_section->vma); |
| 1614 | insn2 = bfd_get_32 (input_bfd, |
| 1615 | (contents |
| 1616 | + r_vaddr |
| 1617 | - input_section->vma |
| 1618 | + r_symndx)); |
| 1619 | |
| 1620 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ |
| 1621 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ |
| 1622 | |
| 1623 | /* Get the existing addend. We must account for the sign |
| 1624 | extension done by lda and ldah. */ |
| 1625 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); |
| 1626 | if (insn1 & 0x8000) |
| 1627 | { |
| 1628 | /* This is addend -= 0x100000000 without causing an |
| 1629 | integer overflow on a 32 bit host. */ |
| 1630 | addend -= 0x80000000; |
| 1631 | addend -= 0x80000000; |
| 1632 | } |
| 1633 | if (insn2 & 0x8000) |
| 1634 | addend -= 0x10000; |
| 1635 | |
| 1636 | /* The existing addend includes the difference between the |
| 1637 | gp of the input BFD and the address in the input BFD. |
| 1638 | We want to change this to the difference between the |
| 1639 | final GP and the final address. */ |
| 1640 | addend += (gp |
| 1641 | - ecoff_data (input_bfd)->gp |
| 1642 | + input_section->vma |
| 1643 | - (input_section->output_section->vma |
| 1644 | + input_section->output_offset)); |
| 1645 | |
| 1646 | /* Change the instructions, accounting for the sign |
| 1647 | extension, and write them out. */ |
| 1648 | if (addend & 0x8000) |
| 1649 | addend += 0x10000; |
| 1650 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); |
| 1651 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); |
| 1652 | |
| 1653 | bfd_put_32 (input_bfd, (bfd_vma) insn1, |
| 1654 | contents + r_vaddr - input_section->vma); |
| 1655 | bfd_put_32 (input_bfd, (bfd_vma) insn2, |
| 1656 | contents + r_vaddr - input_section->vma + r_symndx); |
| 1657 | |
| 1658 | gp_usedp = TRUE; |
| 1659 | } |
| 1660 | break; |
| 1661 | |
| 1662 | case ALPHA_R_OP_PUSH: |
| 1663 | case ALPHA_R_OP_PSUB: |
| 1664 | case ALPHA_R_OP_PRSHIFT: |
| 1665 | /* Manipulate values on the reloc evaluation stack. The |
| 1666 | r_vaddr field is not an address in input_section, it is |
| 1667 | the current value (including any addend) of the object |
| 1668 | being used. */ |
| 1669 | if (! r_extern) |
| 1670 | { |
| 1671 | asection *s; |
| 1672 | |
| 1673 | s = symndx_to_section[r_symndx]; |
| 1674 | if (s == (asection *) NULL) |
| 1675 | abort (); |
| 1676 | addend = s->output_section->vma + s->output_offset - s->vma; |
| 1677 | } |
| 1678 | else |
| 1679 | { |
| 1680 | struct ecoff_link_hash_entry *h; |
| 1681 | |
| 1682 | h = sym_hashes[r_symndx]; |
| 1683 | if (h == (struct ecoff_link_hash_entry *) NULL) |
| 1684 | abort (); |
| 1685 | |
| 1686 | if (! bfd_link_relocatable (info)) |
| 1687 | { |
| 1688 | if (h->root.type == bfd_link_hash_defined |
| 1689 | || h->root.type == bfd_link_hash_defweak) |
| 1690 | addend = (h->root.u.def.value |
| 1691 | + h->root.u.def.section->output_section->vma |
| 1692 | + h->root.u.def.section->output_offset); |
| 1693 | else |
| 1694 | { |
| 1695 | /* Note that we pass the address as 0, since we |
| 1696 | do not have a meaningful number for the |
| 1697 | location within the section that is being |
| 1698 | relocated. */ |
| 1699 | if (! ((*info->callbacks->undefined_symbol) |
| 1700 | (info, h->root.root.string, input_bfd, |
| 1701 | input_section, (bfd_vma) 0, TRUE))) |
| 1702 | return FALSE; |
| 1703 | addend = 0; |
| 1704 | } |
| 1705 | } |
| 1706 | else |
| 1707 | { |
| 1708 | if (h->root.type != bfd_link_hash_defined |
| 1709 | && h->root.type != bfd_link_hash_defweak |
| 1710 | && h->indx == -1) |
| 1711 | { |
| 1712 | /* This symbol is not being written out. Pass |
| 1713 | the address as 0, as with undefined_symbol, |
| 1714 | above. */ |
| 1715 | if (! ((*info->callbacks->unattached_reloc) |
| 1716 | (info, h->root.root.string, input_bfd, |
| 1717 | input_section, (bfd_vma) 0))) |
| 1718 | return FALSE; |
| 1719 | } |
| 1720 | |
| 1721 | addend = alpha_convert_external_reloc (output_bfd, info, |
| 1722 | input_bfd, |
| 1723 | ext_rel, h); |
| 1724 | } |
| 1725 | } |
| 1726 | |
| 1727 | addend += r_vaddr; |
| 1728 | |
| 1729 | if (bfd_link_relocatable (info)) |
| 1730 | { |
| 1731 | /* Adjust r_vaddr by the addend. */ |
| 1732 | H_PUT_64 (input_bfd, addend, ext_rel->r_vaddr); |
| 1733 | } |
| 1734 | else |
| 1735 | { |
| 1736 | switch (r_type) |
| 1737 | { |
| 1738 | case ALPHA_R_OP_PUSH: |
| 1739 | if (tos >= RELOC_STACKSIZE) |
| 1740 | abort (); |
| 1741 | stack[tos++] = addend; |
| 1742 | break; |
| 1743 | |
| 1744 | case ALPHA_R_OP_PSUB: |
| 1745 | if (tos == 0) |
| 1746 | abort (); |
| 1747 | stack[tos - 1] -= addend; |
| 1748 | break; |
| 1749 | |
| 1750 | case ALPHA_R_OP_PRSHIFT: |
| 1751 | if (tos == 0) |
| 1752 | abort (); |
| 1753 | stack[tos - 1] >>= addend; |
| 1754 | break; |
| 1755 | } |
| 1756 | } |
| 1757 | |
| 1758 | adjust_addrp = FALSE; |
| 1759 | break; |
| 1760 | |
| 1761 | case ALPHA_R_OP_STORE: |
| 1762 | /* Store a value from the reloc stack into a bitfield. If |
| 1763 | we are generating relocatable output, all we do is |
| 1764 | adjust the address of the reloc. */ |
| 1765 | if (! bfd_link_relocatable (info)) |
| 1766 | { |
| 1767 | bfd_vma mask; |
| 1768 | bfd_vma val; |
| 1769 | |
| 1770 | if (tos == 0) |
| 1771 | abort (); |
| 1772 | |
| 1773 | /* Get the relocation mask. The separate steps and the |
| 1774 | casts to bfd_vma are attempts to avoid a bug in the |
| 1775 | Alpha OSF 1.3 C compiler. See reloc.c for more |
| 1776 | details. */ |
| 1777 | mask = 1; |
| 1778 | mask <<= (bfd_vma) r_size; |
| 1779 | mask -= 1; |
| 1780 | |
| 1781 | /* FIXME: I don't know what kind of overflow checking, |
| 1782 | if any, should be done here. */ |
| 1783 | val = bfd_get_64 (input_bfd, |
| 1784 | contents + r_vaddr - input_section->vma); |
| 1785 | val &=~ mask << (bfd_vma) r_offset; |
| 1786 | val |= (stack[--tos] & mask) << (bfd_vma) r_offset; |
| 1787 | bfd_put_64 (input_bfd, val, |
| 1788 | contents + r_vaddr - input_section->vma); |
| 1789 | } |
| 1790 | break; |
| 1791 | |
| 1792 | case ALPHA_R_GPVALUE: |
| 1793 | /* I really don't know if this does the right thing. */ |
| 1794 | gp = ecoff_data (input_bfd)->gp + r_symndx; |
| 1795 | gp_undefined = FALSE; |
| 1796 | break; |
| 1797 | } |
| 1798 | |
| 1799 | if (relocatep) |
| 1800 | { |
| 1801 | reloc_howto_type *howto; |
| 1802 | struct ecoff_link_hash_entry *h = NULL; |
| 1803 | asection *s = NULL; |
| 1804 | bfd_vma relocation; |
| 1805 | bfd_reloc_status_type r; |
| 1806 | |
| 1807 | /* Perform a relocation. */ |
| 1808 | |
| 1809 | howto = &alpha_howto_table[r_type]; |
| 1810 | |
| 1811 | if (r_extern) |
| 1812 | { |
| 1813 | h = sym_hashes[r_symndx]; |
| 1814 | /* If h is NULL, that means that there is a reloc |
| 1815 | against an external symbol which we thought was just |
| 1816 | a debugging symbol. This should not happen. */ |
| 1817 | if (h == (struct ecoff_link_hash_entry *) NULL) |
| 1818 | abort (); |
| 1819 | } |
| 1820 | else |
| 1821 | { |
| 1822 | if (r_symndx >= NUM_RELOC_SECTIONS) |
| 1823 | s = NULL; |
| 1824 | else |
| 1825 | s = symndx_to_section[r_symndx]; |
| 1826 | |
| 1827 | if (s == (asection *) NULL) |
| 1828 | abort (); |
| 1829 | } |
| 1830 | |
| 1831 | if (bfd_link_relocatable (info)) |
| 1832 | { |
| 1833 | /* We are generating relocatable output, and must |
| 1834 | convert the existing reloc. */ |
| 1835 | if (r_extern) |
| 1836 | { |
| 1837 | if (h->root.type != bfd_link_hash_defined |
| 1838 | && h->root.type != bfd_link_hash_defweak |
| 1839 | && h->indx == -1) |
| 1840 | { |
| 1841 | /* This symbol is not being written out. */ |
| 1842 | if (! ((*info->callbacks->unattached_reloc) |
| 1843 | (info, h->root.root.string, input_bfd, |
| 1844 | input_section, r_vaddr - input_section->vma))) |
| 1845 | return FALSE; |
| 1846 | } |
| 1847 | |
| 1848 | relocation = alpha_convert_external_reloc (output_bfd, |
| 1849 | info, |
| 1850 | input_bfd, |
| 1851 | ext_rel, |
| 1852 | h); |
| 1853 | } |
| 1854 | else |
| 1855 | { |
| 1856 | /* This is a relocation against a section. Adjust |
| 1857 | the value by the amount the section moved. */ |
| 1858 | relocation = (s->output_section->vma |
| 1859 | + s->output_offset |
| 1860 | - s->vma); |
| 1861 | } |
| 1862 | |
| 1863 | /* If this is PC relative, the existing object file |
| 1864 | appears to already have the reloc worked out. We |
| 1865 | must subtract out the old value and add in the new |
| 1866 | one. */ |
| 1867 | if (howto->pc_relative) |
| 1868 | relocation -= (input_section->output_section->vma |
| 1869 | + input_section->output_offset |
| 1870 | - input_section->vma); |
| 1871 | |
| 1872 | /* Put in any addend. */ |
| 1873 | relocation += addend; |
| 1874 | |
| 1875 | /* Adjust the contents. */ |
| 1876 | r = _bfd_relocate_contents (howto, input_bfd, relocation, |
| 1877 | (contents |
| 1878 | + r_vaddr |
| 1879 | - input_section->vma)); |
| 1880 | } |
| 1881 | else |
| 1882 | { |
| 1883 | /* We are producing a final executable. */ |
| 1884 | if (r_extern) |
| 1885 | { |
| 1886 | /* This is a reloc against a symbol. */ |
| 1887 | if (h->root.type == bfd_link_hash_defined |
| 1888 | || h->root.type == bfd_link_hash_defweak) |
| 1889 | { |
| 1890 | asection *hsec; |
| 1891 | |
| 1892 | hsec = h->root.u.def.section; |
| 1893 | relocation = (h->root.u.def.value |
| 1894 | + hsec->output_section->vma |
| 1895 | + hsec->output_offset); |
| 1896 | } |
| 1897 | else |
| 1898 | { |
| 1899 | if (! ((*info->callbacks->undefined_symbol) |
| 1900 | (info, h->root.root.string, input_bfd, |
| 1901 | input_section, |
| 1902 | r_vaddr - input_section->vma, TRUE))) |
| 1903 | return FALSE; |
| 1904 | relocation = 0; |
| 1905 | } |
| 1906 | } |
| 1907 | else |
| 1908 | { |
| 1909 | /* This is a reloc against a section. */ |
| 1910 | relocation = (s->output_section->vma |
| 1911 | + s->output_offset |
| 1912 | - s->vma); |
| 1913 | |
| 1914 | /* Adjust a PC relative relocation by removing the |
| 1915 | reference to the original source section. */ |
| 1916 | if (howto->pc_relative) |
| 1917 | relocation += input_section->vma; |
| 1918 | } |
| 1919 | |
| 1920 | r = _bfd_final_link_relocate (howto, |
| 1921 | input_bfd, |
| 1922 | input_section, |
| 1923 | contents, |
| 1924 | r_vaddr - input_section->vma, |
| 1925 | relocation, |
| 1926 | addend); |
| 1927 | } |
| 1928 | |
| 1929 | if (r != bfd_reloc_ok) |
| 1930 | { |
| 1931 | switch (r) |
| 1932 | { |
| 1933 | default: |
| 1934 | case bfd_reloc_outofrange: |
| 1935 | abort (); |
| 1936 | case bfd_reloc_overflow: |
| 1937 | { |
| 1938 | const char *name; |
| 1939 | |
| 1940 | if (r_extern) |
| 1941 | name = sym_hashes[r_symndx]->root.root.string; |
| 1942 | else |
| 1943 | name = bfd_section_name (input_bfd, |
| 1944 | symndx_to_section[r_symndx]); |
| 1945 | if (! ((*info->callbacks->reloc_overflow) |
| 1946 | (info, NULL, name, |
| 1947 | alpha_howto_table[r_type].name, |
| 1948 | (bfd_vma) 0, input_bfd, input_section, |
| 1949 | r_vaddr - input_section->vma))) |
| 1950 | return FALSE; |
| 1951 | } |
| 1952 | break; |
| 1953 | } |
| 1954 | } |
| 1955 | } |
| 1956 | |
| 1957 | if (bfd_link_relocatable (info) && adjust_addrp) |
| 1958 | { |
| 1959 | /* Change the address of the relocation. */ |
| 1960 | H_PUT_64 (input_bfd, |
| 1961 | (input_section->output_section->vma |
| 1962 | + input_section->output_offset |
| 1963 | - input_section->vma |
| 1964 | + r_vaddr), |
| 1965 | ext_rel->r_vaddr); |
| 1966 | } |
| 1967 | |
| 1968 | if (gp_usedp && gp_undefined) |
| 1969 | { |
| 1970 | if (! ((*info->callbacks->reloc_dangerous) |
| 1971 | (info, _("GP relative relocation used when GP not defined"), |
| 1972 | input_bfd, input_section, r_vaddr - input_section->vma))) |
| 1973 | return FALSE; |
| 1974 | /* Only give the error once per link. */ |
| 1975 | gp = 4; |
| 1976 | _bfd_set_gp_value (output_bfd, gp); |
| 1977 | gp_undefined = FALSE; |
| 1978 | } |
| 1979 | } |
| 1980 | |
| 1981 | if (tos != 0) |
| 1982 | abort (); |
| 1983 | |
| 1984 | return TRUE; |
| 1985 | } |
| 1986 | \f |
| 1987 | /* Do final adjustments to the filehdr and the aouthdr. This routine |
| 1988 | sets the dynamic bits in the file header. */ |
| 1989 | |
| 1990 | static bfd_boolean |
| 1991 | alpha_adjust_headers (bfd *abfd, |
| 1992 | struct internal_filehdr *fhdr, |
| 1993 | struct internal_aouthdr *ahdr ATTRIBUTE_UNUSED) |
| 1994 | { |
| 1995 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == (DYNAMIC | EXEC_P)) |
| 1996 | fhdr->f_flags |= F_ALPHA_CALL_SHARED; |
| 1997 | else if ((abfd->flags & DYNAMIC) != 0) |
| 1998 | fhdr->f_flags |= F_ALPHA_SHARABLE; |
| 1999 | return TRUE; |
| 2000 | } |
| 2001 | \f |
| 2002 | /* Archive handling. In OSF/1 (or Digital Unix) v3.2, Digital |
| 2003 | introduced archive packing, in which the elements in an archive are |
| 2004 | optionally compressed using a simple dictionary scheme. We know |
| 2005 | how to read such archives, but we don't write them. */ |
| 2006 | |
| 2007 | #define alpha_ecoff_slurp_armap _bfd_ecoff_slurp_armap |
| 2008 | #define alpha_ecoff_slurp_extended_name_table \ |
| 2009 | _bfd_ecoff_slurp_extended_name_table |
| 2010 | #define alpha_ecoff_construct_extended_name_table \ |
| 2011 | _bfd_ecoff_construct_extended_name_table |
| 2012 | #define alpha_ecoff_truncate_arname _bfd_ecoff_truncate_arname |
| 2013 | #define alpha_ecoff_write_armap _bfd_ecoff_write_armap |
| 2014 | #define alpha_ecoff_write_ar_hdr _bfd_generic_write_ar_hdr |
| 2015 | #define alpha_ecoff_generic_stat_arch_elt _bfd_ecoff_generic_stat_arch_elt |
| 2016 | #define alpha_ecoff_update_armap_timestamp _bfd_ecoff_update_armap_timestamp |
| 2017 | |
| 2018 | /* A compressed file uses this instead of ARFMAG. */ |
| 2019 | |
| 2020 | #define ARFZMAG "Z\012" |
| 2021 | |
| 2022 | /* Read an archive header. This is like the standard routine, but it |
| 2023 | also accepts ARFZMAG. */ |
| 2024 | |
| 2025 | static void * |
| 2026 | alpha_ecoff_read_ar_hdr (bfd *abfd) |
| 2027 | { |
| 2028 | struct areltdata *ret; |
| 2029 | struct ar_hdr *h; |
| 2030 | |
| 2031 | ret = (struct areltdata *) _bfd_generic_read_ar_hdr_mag (abfd, ARFZMAG); |
| 2032 | if (ret == NULL) |
| 2033 | return NULL; |
| 2034 | |
| 2035 | h = (struct ar_hdr *) ret->arch_header; |
| 2036 | if (strncmp (h->ar_fmag, ARFZMAG, 2) == 0) |
| 2037 | { |
| 2038 | bfd_byte ab[8]; |
| 2039 | |
| 2040 | /* This is a compressed file. We must set the size correctly. |
| 2041 | The size is the eight bytes after the dummy file header. */ |
| 2042 | if (bfd_seek (abfd, (file_ptr) FILHSZ, SEEK_CUR) != 0 |
| 2043 | || bfd_bread (ab, (bfd_size_type) 8, abfd) != 8 |
| 2044 | || bfd_seek (abfd, (file_ptr) (- (FILHSZ + 8)), SEEK_CUR) != 0) |
| 2045 | return NULL; |
| 2046 | |
| 2047 | ret->parsed_size = H_GET_64 (abfd, ab); |
| 2048 | } |
| 2049 | |
| 2050 | return ret; |
| 2051 | } |
| 2052 | |
| 2053 | /* Get an archive element at a specified file position. This is where |
| 2054 | we uncompress the archive element if necessary. */ |
| 2055 | |
| 2056 | static bfd * |
| 2057 | alpha_ecoff_get_elt_at_filepos (bfd *archive, file_ptr filepos) |
| 2058 | { |
| 2059 | bfd *nbfd = NULL; |
| 2060 | struct areltdata *tdata; |
| 2061 | struct ar_hdr *hdr; |
| 2062 | bfd_byte ab[8]; |
| 2063 | bfd_size_type size; |
| 2064 | bfd_byte *buf, *p; |
| 2065 | struct bfd_in_memory *bim; |
| 2066 | |
| 2067 | buf = NULL; |
| 2068 | nbfd = _bfd_get_elt_at_filepos (archive, filepos); |
| 2069 | if (nbfd == NULL) |
| 2070 | goto error_return; |
| 2071 | |
| 2072 | if ((nbfd->flags & BFD_IN_MEMORY) != 0) |
| 2073 | { |
| 2074 | /* We have already expanded this BFD. */ |
| 2075 | return nbfd; |
| 2076 | } |
| 2077 | |
| 2078 | tdata = (struct areltdata *) nbfd->arelt_data; |
| 2079 | hdr = (struct ar_hdr *) tdata->arch_header; |
| 2080 | if (strncmp (hdr->ar_fmag, ARFZMAG, 2) != 0) |
| 2081 | return nbfd; |
| 2082 | |
| 2083 | /* We must uncompress this element. We do this by copying it into a |
| 2084 | memory buffer, and making bfd_bread and bfd_seek use that buffer. |
| 2085 | This can use a lot of memory, but it's simpler than getting a |
| 2086 | temporary file, making that work with the file descriptor caching |
| 2087 | code, and making sure that it is deleted at all appropriate |
| 2088 | times. It can be changed if it ever becomes important. */ |
| 2089 | |
| 2090 | /* The compressed file starts with a dummy ECOFF file header. */ |
| 2091 | if (bfd_seek (nbfd, (file_ptr) FILHSZ, SEEK_SET) != 0) |
| 2092 | goto error_return; |
| 2093 | |
| 2094 | /* The next eight bytes are the real file size. */ |
| 2095 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
| 2096 | goto error_return; |
| 2097 | size = H_GET_64 (nbfd, ab); |
| 2098 | |
| 2099 | if (size != 0) |
| 2100 | { |
| 2101 | bfd_size_type left; |
| 2102 | bfd_byte dict[4096]; |
| 2103 | unsigned int h; |
| 2104 | bfd_byte b; |
| 2105 | |
| 2106 | buf = (bfd_byte *) bfd_malloc (size); |
| 2107 | if (buf == NULL) |
| 2108 | goto error_return; |
| 2109 | p = buf; |
| 2110 | |
| 2111 | left = size; |
| 2112 | |
| 2113 | /* I don't know what the next eight bytes are for. */ |
| 2114 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
| 2115 | goto error_return; |
| 2116 | |
| 2117 | /* This is the uncompression algorithm. It's a simple |
| 2118 | dictionary based scheme in which each character is predicted |
| 2119 | by a hash of the previous three characters. A control byte |
| 2120 | indicates whether the character is predicted or whether it |
| 2121 | appears in the input stream; each control byte manages the |
| 2122 | next eight bytes in the output stream. */ |
| 2123 | memset (dict, 0, sizeof dict); |
| 2124 | h = 0; |
| 2125 | while (bfd_bread (&b, (bfd_size_type) 1, nbfd) == 1) |
| 2126 | { |
| 2127 | unsigned int i; |
| 2128 | |
| 2129 | for (i = 0; i < 8; i++, b >>= 1) |
| 2130 | { |
| 2131 | bfd_byte n; |
| 2132 | |
| 2133 | if ((b & 1) == 0) |
| 2134 | n = dict[h]; |
| 2135 | else |
| 2136 | { |
| 2137 | if (! bfd_bread (&n, (bfd_size_type) 1, nbfd)) |
| 2138 | goto error_return; |
| 2139 | dict[h] = n; |
| 2140 | } |
| 2141 | |
| 2142 | *p++ = n; |
| 2143 | |
| 2144 | --left; |
| 2145 | if (left == 0) |
| 2146 | break; |
| 2147 | |
| 2148 | h <<= 4; |
| 2149 | h ^= n; |
| 2150 | h &= sizeof dict - 1; |
| 2151 | } |
| 2152 | |
| 2153 | if (left == 0) |
| 2154 | break; |
| 2155 | } |
| 2156 | } |
| 2157 | |
| 2158 | /* Now the uncompressed file contents are in buf. */ |
| 2159 | bim = ((struct bfd_in_memory *) |
| 2160 | bfd_malloc ((bfd_size_type) sizeof (struct bfd_in_memory))); |
| 2161 | if (bim == NULL) |
| 2162 | goto error_return; |
| 2163 | bim->size = size; |
| 2164 | bim->buffer = buf; |
| 2165 | |
| 2166 | nbfd->mtime_set = TRUE; |
| 2167 | nbfd->mtime = strtol (hdr->ar_date, (char **) NULL, 10); |
| 2168 | |
| 2169 | nbfd->flags |= BFD_IN_MEMORY; |
| 2170 | nbfd->iostream = bim; |
| 2171 | nbfd->iovec = &_bfd_memory_iovec; |
| 2172 | nbfd->origin = 0; |
| 2173 | BFD_ASSERT (! nbfd->cacheable); |
| 2174 | |
| 2175 | return nbfd; |
| 2176 | |
| 2177 | error_return: |
| 2178 | if (buf != NULL) |
| 2179 | free (buf); |
| 2180 | if (nbfd != NULL) |
| 2181 | bfd_close (nbfd); |
| 2182 | return NULL; |
| 2183 | } |
| 2184 | |
| 2185 | /* Open the next archived file. */ |
| 2186 | |
| 2187 | static bfd * |
| 2188 | alpha_ecoff_openr_next_archived_file (bfd *archive, bfd *last_file) |
| 2189 | { |
| 2190 | ufile_ptr filestart; |
| 2191 | |
| 2192 | if (last_file == NULL) |
| 2193 | filestart = bfd_ardata (archive)->first_file_filepos; |
| 2194 | else |
| 2195 | { |
| 2196 | struct areltdata *t; |
| 2197 | struct ar_hdr *h; |
| 2198 | bfd_size_type size; |
| 2199 | |
| 2200 | /* We can't use arelt_size here, because that uses parsed_size, |
| 2201 | which is the uncompressed size. We need the compressed size. */ |
| 2202 | t = (struct areltdata *) last_file->arelt_data; |
| 2203 | h = (struct ar_hdr *) t->arch_header; |
| 2204 | size = strtol (h->ar_size, (char **) NULL, 10); |
| 2205 | |
| 2206 | /* Pad to an even boundary... |
| 2207 | Note that last_file->origin can be odd in the case of |
| 2208 | BSD-4.4-style element with a long odd size. */ |
| 2209 | filestart = last_file->proxy_origin + size; |
| 2210 | filestart += filestart % 2; |
| 2211 | if (filestart <= last_file->proxy_origin) |
| 2212 | { |
| 2213 | /* Prevent looping. See PR19256. */ |
| 2214 | bfd_set_error (bfd_error_malformed_archive); |
| 2215 | return NULL; |
| 2216 | } |
| 2217 | } |
| 2218 | |
| 2219 | return alpha_ecoff_get_elt_at_filepos (archive, filestart); |
| 2220 | } |
| 2221 | |
| 2222 | /* Open the archive file given an index into the armap. */ |
| 2223 | |
| 2224 | static bfd * |
| 2225 | alpha_ecoff_get_elt_at_index (bfd *abfd, symindex sym_index) |
| 2226 | { |
| 2227 | carsym *entry; |
| 2228 | |
| 2229 | entry = bfd_ardata (abfd)->symdefs + sym_index; |
| 2230 | return alpha_ecoff_get_elt_at_filepos (abfd, entry->file_offset); |
| 2231 | } |
| 2232 | \f |
| 2233 | /* This is the ECOFF backend structure. The backend field of the |
| 2234 | target vector points to this. */ |
| 2235 | |
| 2236 | static const struct ecoff_backend_data alpha_ecoff_backend_data = |
| 2237 | { |
| 2238 | /* COFF backend structure. */ |
| 2239 | { |
| 2240 | (void (*) (bfd *,void *,int,int,int,int,void *)) bfd_void, /* aux_in */ |
| 2241 | (void (*) (bfd *,void *,void *)) bfd_void, /* sym_in */ |
| 2242 | (void (*) (bfd *,void *,void *)) bfd_void, /* lineno_in */ |
| 2243 | (unsigned (*) (bfd *,void *,int,int,int,int,void *)) bfd_void,/*aux_out*/ |
| 2244 | (unsigned (*) (bfd *,void *,void *)) bfd_void, /* sym_out */ |
| 2245 | (unsigned (*) (bfd *,void *,void *)) bfd_void, /* lineno_out */ |
| 2246 | (unsigned (*) (bfd *,void *,void *)) bfd_void, /* reloc_out */ |
| 2247 | alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out, |
| 2248 | alpha_ecoff_swap_scnhdr_out, |
| 2249 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE, |
| 2250 | ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, 32768, |
| 2251 | alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in, |
| 2252 | alpha_ecoff_swap_scnhdr_in, NULL, |
| 2253 | alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook, |
| 2254 | alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags, |
| 2255 | _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table, |
| 2256 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 2257 | NULL, NULL, NULL, NULL |
| 2258 | }, |
| 2259 | /* Supported architecture. */ |
| 2260 | bfd_arch_alpha, |
| 2261 | /* Initial portion of armap string. */ |
| 2262 | "________64", |
| 2263 | /* The page boundary used to align sections in a demand-paged |
| 2264 | executable file. E.g., 0x1000. */ |
| 2265 | 0x2000, |
| 2266 | /* TRUE if the .rdata section is part of the text segment, as on the |
| 2267 | Alpha. FALSE if .rdata is part of the data segment, as on the |
| 2268 | MIPS. */ |
| 2269 | TRUE, |
| 2270 | /* Bitsize of constructor entries. */ |
| 2271 | 64, |
| 2272 | /* Reloc to use for constructor entries. */ |
| 2273 | &alpha_howto_table[ALPHA_R_REFQUAD], |
| 2274 | { |
| 2275 | /* Symbol table magic number. */ |
| 2276 | magicSym2, |
| 2277 | /* Alignment of debugging information. E.g., 4. */ |
| 2278 | 8, |
| 2279 | /* Sizes of external symbolic information. */ |
| 2280 | sizeof (struct hdr_ext), |
| 2281 | sizeof (struct dnr_ext), |
| 2282 | sizeof (struct pdr_ext), |
| 2283 | sizeof (struct sym_ext), |
| 2284 | sizeof (struct opt_ext), |
| 2285 | sizeof (struct fdr_ext), |
| 2286 | sizeof (struct rfd_ext), |
| 2287 | sizeof (struct ext_ext), |
| 2288 | /* Functions to swap in external symbolic data. */ |
| 2289 | ecoff_swap_hdr_in, |
| 2290 | ecoff_swap_dnr_in, |
| 2291 | ecoff_swap_pdr_in, |
| 2292 | ecoff_swap_sym_in, |
| 2293 | ecoff_swap_opt_in, |
| 2294 | ecoff_swap_fdr_in, |
| 2295 | ecoff_swap_rfd_in, |
| 2296 | ecoff_swap_ext_in, |
| 2297 | _bfd_ecoff_swap_tir_in, |
| 2298 | _bfd_ecoff_swap_rndx_in, |
| 2299 | /* Functions to swap out external symbolic data. */ |
| 2300 | ecoff_swap_hdr_out, |
| 2301 | ecoff_swap_dnr_out, |
| 2302 | ecoff_swap_pdr_out, |
| 2303 | ecoff_swap_sym_out, |
| 2304 | ecoff_swap_opt_out, |
| 2305 | ecoff_swap_fdr_out, |
| 2306 | ecoff_swap_rfd_out, |
| 2307 | ecoff_swap_ext_out, |
| 2308 | _bfd_ecoff_swap_tir_out, |
| 2309 | _bfd_ecoff_swap_rndx_out, |
| 2310 | /* Function to read in symbolic data. */ |
| 2311 | _bfd_ecoff_slurp_symbolic_info |
| 2312 | }, |
| 2313 | /* External reloc size. */ |
| 2314 | RELSZ, |
| 2315 | /* Reloc swapping functions. */ |
| 2316 | alpha_ecoff_swap_reloc_in, |
| 2317 | alpha_ecoff_swap_reloc_out, |
| 2318 | /* Backend reloc tweaking. */ |
| 2319 | alpha_adjust_reloc_in, |
| 2320 | alpha_adjust_reloc_out, |
| 2321 | /* Relocate section contents while linking. */ |
| 2322 | alpha_relocate_section, |
| 2323 | /* Do final adjustments to filehdr and aouthdr. */ |
| 2324 | alpha_adjust_headers, |
| 2325 | /* Read an element from an archive at a given file position. */ |
| 2326 | alpha_ecoff_get_elt_at_filepos |
| 2327 | }; |
| 2328 | |
| 2329 | /* Looking up a reloc type is Alpha specific. */ |
| 2330 | #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup |
| 2331 | #define _bfd_ecoff_bfd_reloc_name_lookup \ |
| 2332 | alpha_bfd_reloc_name_lookup |
| 2333 | |
| 2334 | /* So is getting relocated section contents. */ |
| 2335 | #define _bfd_ecoff_bfd_get_relocated_section_contents \ |
| 2336 | alpha_ecoff_get_relocated_section_contents |
| 2337 | |
| 2338 | /* Handling file windows is generic. */ |
| 2339 | #define _bfd_ecoff_get_section_contents_in_window \ |
| 2340 | _bfd_generic_get_section_contents_in_window |
| 2341 | |
| 2342 | /* Input section flag lookup is generic. */ |
| 2343 | #define _bfd_ecoff_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
| 2344 | |
| 2345 | /* Relaxing sections is generic. */ |
| 2346 | #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section |
| 2347 | #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections |
| 2348 | #define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections |
| 2349 | #define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section |
| 2350 | #define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group |
| 2351 | #define _bfd_ecoff_section_already_linked \ |
| 2352 | _bfd_coff_section_already_linked |
| 2353 | #define _bfd_ecoff_bfd_define_common_symbol bfd_generic_define_common_symbol |
| 2354 | |
| 2355 | const bfd_target alpha_ecoff_le_vec = |
| 2356 | { |
| 2357 | "ecoff-littlealpha", /* name */ |
| 2358 | bfd_target_ecoff_flavour, |
| 2359 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 2360 | BFD_ENDIAN_LITTLE, /* header byte order is little */ |
| 2361 | |
| 2362 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 2363 | HAS_LINENO | HAS_DEBUG | |
| 2364 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), |
| 2365 | |
| 2366 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 2367 | 0, /* leading underscore */ |
| 2368 | ' ', /* ar_pad_char */ |
| 2369 | 15, /* ar_max_namelen */ |
| 2370 | 0, /* match priority. */ |
| 2371 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 2372 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 2373 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 2374 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 2375 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 2376 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 2377 | |
| 2378 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ |
| 2379 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 2380 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ |
| 2381 | _bfd_generic_mkarchive, bfd_false}, |
| 2382 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ |
| 2383 | _bfd_write_archive_contents, bfd_false}, |
| 2384 | |
| 2385 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), |
| 2386 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), |
| 2387 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 2388 | BFD_JUMP_TABLE_ARCHIVE (alpha_ecoff), |
| 2389 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), |
| 2390 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), |
| 2391 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), |
| 2392 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), |
| 2393 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 2394 | |
| 2395 | NULL, |
| 2396 | |
| 2397 | & alpha_ecoff_backend_data |
| 2398 | }; |