| 1 | /* Support for 32-bit PowerPC NLM (NetWare Loadable Module) |
| 2 | Copyright 1994, 1995, 2000, 2001, 2002, 2003 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | |
| 25 | /* The format of a PowerPC NLM changed. Define OLDFORMAT to get the |
| 26 | old format. */ |
| 27 | |
| 28 | #define ARCH_SIZE 32 |
| 29 | |
| 30 | #include "nlm/ppc-ext.h" |
| 31 | #define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header |
| 32 | |
| 33 | #include "libnlm.h" |
| 34 | |
| 35 | #ifdef OLDFORMAT |
| 36 | static bfd_boolean nlm_powerpc_backend_object_p |
| 37 | PARAMS ((bfd *)); |
| 38 | static bfd_boolean nlm_powerpc_write_prefix |
| 39 | PARAMS ((bfd *)); |
| 40 | #endif |
| 41 | |
| 42 | static bfd_boolean nlm_powerpc_read_reloc |
| 43 | PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *)); |
| 44 | static bfd_boolean nlm_powerpc_mangle_relocs |
| 45 | PARAMS ((bfd *, asection *, const PTR, bfd_vma, bfd_size_type)); |
| 46 | static bfd_boolean nlm_powerpc_read_import |
| 47 | PARAMS ((bfd *, nlmNAME(symbol_type) *)); |
| 48 | |
| 49 | #ifdef OLDFORMAT |
| 50 | static bfd_boolean nlm_powerpc_write_reloc |
| 51 | PARAMS ((bfd *, asection *, arelent *, int)); |
| 52 | #endif |
| 53 | |
| 54 | static bfd_boolean nlm_powerpc_write_import |
| 55 | PARAMS ((bfd *, asection *, arelent *)); |
| 56 | static bfd_boolean nlm_powerpc_write_external |
| 57 | PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *)); |
| 58 | |
| 59 | #ifndef OLDFORMAT |
| 60 | static bfd_boolean nlm_powerpc_set_public_section |
| 61 | PARAMS ((bfd *, nlmNAME(symbol_type) *)); |
| 62 | static bfd_vma nlm_powerpc_get_public_offset |
| 63 | PARAMS ((bfd *, asymbol *)); |
| 64 | #endif |
| 65 | \f |
| 66 | #ifdef OLDFORMAT |
| 67 | |
| 68 | /* The prefix header is only used in the old format. */ |
| 69 | |
| 70 | /* PowerPC NLM's have a prefix header before the standard NLM. This |
| 71 | function reads it in, verifies the version, and seeks the bfd to |
| 72 | the location before the regular NLM header. */ |
| 73 | |
| 74 | static bfd_boolean |
| 75 | nlm_powerpc_backend_object_p (abfd) |
| 76 | bfd *abfd; |
| 77 | { |
| 78 | struct nlm32_powerpc_external_prefix_header s; |
| 79 | |
| 80 | if (bfd_bread ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| 81 | return FALSE; |
| 82 | |
| 83 | if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0 |
| 84 | || H_GET_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION) |
| 85 | return FALSE; |
| 86 | |
| 87 | return TRUE; |
| 88 | } |
| 89 | |
| 90 | /* Write out the prefix. */ |
| 91 | |
| 92 | static bfd_boolean |
| 93 | nlm_powerpc_write_prefix (abfd) |
| 94 | bfd *abfd; |
| 95 | { |
| 96 | struct nlm32_powerpc_external_prefix_header s; |
| 97 | |
| 98 | memset (&s, 0, sizeof s); |
| 99 | memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature); |
| 100 | H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion); |
| 101 | H_PUT_32 (abfd, 0, s.origins); |
| 102 | |
| 103 | /* FIXME: What should we do about the date? */ |
| 104 | |
| 105 | if (bfd_bwrite ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| 106 | return FALSE; |
| 107 | |
| 108 | return TRUE; |
| 109 | } |
| 110 | |
| 111 | #endif /* OLDFORMAT */ |
| 112 | \f |
| 113 | #ifndef OLDFORMAT |
| 114 | |
| 115 | /* There is only one type of reloc in a PowerPC NLM. */ |
| 116 | |
| 117 | static reloc_howto_type nlm_powerpc_howto = |
| 118 | HOWTO (0, /* type */ |
| 119 | 0, /* rightshift */ |
| 120 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 121 | 32, /* bitsize */ |
| 122 | FALSE, /* pc_relative */ |
| 123 | 0, /* bitpos */ |
| 124 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 125 | 0, /* special_function */ |
| 126 | "32", /* name */ |
| 127 | TRUE, /* partial_inplace */ |
| 128 | 0xffffffff, /* src_mask */ |
| 129 | 0xffffffff, /* dst_mask */ |
| 130 | FALSE); /* pcrel_offset */ |
| 131 | |
| 132 | /* Read a PowerPC NLM reloc. */ |
| 133 | |
| 134 | static bfd_boolean |
| 135 | nlm_powerpc_read_reloc (abfd, sym, secp, rel) |
| 136 | bfd *abfd; |
| 137 | nlmNAME(symbol_type) *sym; |
| 138 | asection **secp; |
| 139 | arelent *rel; |
| 140 | { |
| 141 | bfd_byte temp[4]; |
| 142 | bfd_vma val; |
| 143 | const char *name; |
| 144 | |
| 145 | if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| 146 | return FALSE; |
| 147 | |
| 148 | val = bfd_get_32 (abfd, temp); |
| 149 | |
| 150 | /* The value is a word offset into either the code or data segment. |
| 151 | This is the location which needs to be adjusted. |
| 152 | |
| 153 | The high bit is 0 if the value is an offset into the data |
| 154 | segment, or 1 if the value is an offset into the text segment. |
| 155 | |
| 156 | If this is a relocation fixup rather than an imported symbol (the |
| 157 | sym argument is NULL), then the second most significant bit is 0 |
| 158 | if the address of the data segment should be added to the |
| 159 | location addressed by the value, or 1 if the address of the text |
| 160 | segment should be added. |
| 161 | |
| 162 | If this is an imported symbol, the second most significant bit is |
| 163 | not used and must be 0. */ |
| 164 | |
| 165 | if ((val & NLM_HIBIT) == 0) |
| 166 | name = NLM_INITIALIZED_DATA_NAME; |
| 167 | else |
| 168 | { |
| 169 | name = NLM_CODE_NAME; |
| 170 | val &=~ NLM_HIBIT; |
| 171 | } |
| 172 | *secp = bfd_get_section_by_name (abfd, name); |
| 173 | |
| 174 | if (sym == NULL) |
| 175 | { |
| 176 | if ((val & (NLM_HIBIT >> 1)) == 0) |
| 177 | name = NLM_INITIALIZED_DATA_NAME; |
| 178 | else |
| 179 | { |
| 180 | name = NLM_CODE_NAME; |
| 181 | val &=~ (NLM_HIBIT >> 1); |
| 182 | } |
| 183 | rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr; |
| 184 | } |
| 185 | |
| 186 | rel->howto = &nlm_powerpc_howto; |
| 187 | |
| 188 | rel->address = val << 2; |
| 189 | rel->addend = 0; |
| 190 | |
| 191 | return TRUE; |
| 192 | } |
| 193 | |
| 194 | #else /* OLDFORMAT */ |
| 195 | |
| 196 | /* This reloc handling is only applicable to the old format. */ |
| 197 | |
| 198 | /* How to process the various reloc types. PowerPC NLMs use XCOFF |
| 199 | reloc types, and I have just copied the XCOFF reloc table here. */ |
| 200 | |
| 201 | static reloc_howto_type nlm_powerpc_howto_table[] = |
| 202 | { |
| 203 | /* Standard 32 bit relocation. */ |
| 204 | HOWTO (0, /* 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_bitfield, /* complain_on_overflow */ |
| 211 | 0, /* special_function */ |
| 212 | "R_POS", /* name */ |
| 213 | TRUE, /* partial_inplace */ |
| 214 | 0xffffffff, /* src_mask */ |
| 215 | 0xffffffff, /* dst_mask */ |
| 216 | FALSE), /* pcrel_offset */ |
| 217 | |
| 218 | /* 32 bit relocation, but store negative value. */ |
| 219 | HOWTO (1, /* type */ |
| 220 | 0, /* rightshift */ |
| 221 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 222 | 32, /* bitsize */ |
| 223 | FALSE, /* pc_relative */ |
| 224 | 0, /* bitpos */ |
| 225 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 226 | 0, /* special_function */ |
| 227 | "R_NEG", /* name */ |
| 228 | TRUE, /* partial_inplace */ |
| 229 | 0xffffffff, /* src_mask */ |
| 230 | 0xffffffff, /* dst_mask */ |
| 231 | FALSE), /* pcrel_offset */ |
| 232 | |
| 233 | /* 32 bit PC relative relocation. */ |
| 234 | HOWTO (2, /* type */ |
| 235 | 0, /* rightshift */ |
| 236 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 237 | 32, /* bitsize */ |
| 238 | TRUE, /* pc_relative */ |
| 239 | 0, /* bitpos */ |
| 240 | complain_overflow_signed, /* complain_on_overflow */ |
| 241 | 0, /* special_function */ |
| 242 | "R_REL", /* name */ |
| 243 | TRUE, /* partial_inplace */ |
| 244 | 0xffffffff, /* src_mask */ |
| 245 | 0xffffffff, /* dst_mask */ |
| 246 | FALSE), /* pcrel_offset */ |
| 247 | |
| 248 | /* 16 bit TOC relative relocation. */ |
| 249 | HOWTO (3, /* type */ |
| 250 | 0, /* rightshift */ |
| 251 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 252 | 16, /* bitsize */ |
| 253 | FALSE, /* pc_relative */ |
| 254 | 0, /* bitpos */ |
| 255 | complain_overflow_signed, /* complain_on_overflow */ |
| 256 | 0, /* special_function */ |
| 257 | "R_TOC", /* name */ |
| 258 | TRUE, /* partial_inplace */ |
| 259 | 0xffff, /* src_mask */ |
| 260 | 0xffff, /* dst_mask */ |
| 261 | FALSE), /* pcrel_offset */ |
| 262 | |
| 263 | /* I don't really know what this is. */ |
| 264 | HOWTO (4, /* type */ |
| 265 | 1, /* rightshift */ |
| 266 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 267 | 32, /* bitsize */ |
| 268 | FALSE, /* pc_relative */ |
| 269 | 0, /* bitpos */ |
| 270 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 271 | 0, /* special_function */ |
| 272 | "R_RTB", /* name */ |
| 273 | TRUE, /* partial_inplace */ |
| 274 | 0xffffffff, /* src_mask */ |
| 275 | 0xffffffff, /* dst_mask */ |
| 276 | FALSE), /* pcrel_offset */ |
| 277 | |
| 278 | /* External TOC relative symbol. */ |
| 279 | HOWTO (5, /* type */ |
| 280 | 0, /* rightshift */ |
| 281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 282 | 16, /* bitsize */ |
| 283 | FALSE, /* pc_relative */ |
| 284 | 0, /* bitpos */ |
| 285 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 286 | 0, /* special_function */ |
| 287 | "R_GL", /* name */ |
| 288 | TRUE, /* partial_inplace */ |
| 289 | 0xffff, /* src_mask */ |
| 290 | 0xffff, /* dst_mask */ |
| 291 | FALSE), /* pcrel_offset */ |
| 292 | |
| 293 | /* Local TOC relative symbol. */ |
| 294 | HOWTO (6, /* type */ |
| 295 | 0, /* rightshift */ |
| 296 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 297 | 16, /* bitsize */ |
| 298 | FALSE, /* pc_relative */ |
| 299 | 0, /* bitpos */ |
| 300 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 301 | 0, /* special_function */ |
| 302 | "R_TCL", /* name */ |
| 303 | TRUE, /* partial_inplace */ |
| 304 | 0xffff, /* src_mask */ |
| 305 | 0xffff, /* dst_mask */ |
| 306 | FALSE), /* pcrel_offset */ |
| 307 | |
| 308 | { 7 }, |
| 309 | |
| 310 | /* Non modifiable absolute branch. */ |
| 311 | HOWTO (8, /* type */ |
| 312 | 0, /* rightshift */ |
| 313 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 314 | 26, /* bitsize */ |
| 315 | FALSE, /* pc_relative */ |
| 316 | 0, /* bitpos */ |
| 317 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 318 | 0, /* special_function */ |
| 319 | "R_BA", /* name */ |
| 320 | TRUE, /* partial_inplace */ |
| 321 | 0x3fffffc, /* src_mask */ |
| 322 | 0x3fffffc, /* dst_mask */ |
| 323 | FALSE), /* pcrel_offset */ |
| 324 | |
| 325 | { 9 }, |
| 326 | |
| 327 | /* Non modifiable relative branch. */ |
| 328 | HOWTO (0xa, /* type */ |
| 329 | 0, /* rightshift */ |
| 330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 331 | 26, /* bitsize */ |
| 332 | TRUE, /* pc_relative */ |
| 333 | 0, /* bitpos */ |
| 334 | complain_overflow_signed, /* complain_on_overflow */ |
| 335 | 0, /* special_function */ |
| 336 | "R_BR", /* name */ |
| 337 | TRUE, /* partial_inplace */ |
| 338 | 0x3fffffc, /* src_mask */ |
| 339 | 0x3fffffc, /* dst_mask */ |
| 340 | FALSE), /* pcrel_offset */ |
| 341 | |
| 342 | { 0xb }, |
| 343 | |
| 344 | /* Indirect load. */ |
| 345 | HOWTO (0xc, /* type */ |
| 346 | 0, /* rightshift */ |
| 347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 348 | 16, /* bitsize */ |
| 349 | FALSE, /* pc_relative */ |
| 350 | 0, /* bitpos */ |
| 351 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 352 | 0, /* special_function */ |
| 353 | "R_RL", /* name */ |
| 354 | TRUE, /* partial_inplace */ |
| 355 | 0xffff, /* src_mask */ |
| 356 | 0xffff, /* dst_mask */ |
| 357 | FALSE), /* pcrel_offset */ |
| 358 | |
| 359 | /* Load address. */ |
| 360 | HOWTO (0xd, /* type */ |
| 361 | 0, /* rightshift */ |
| 362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 363 | 16, /* bitsize */ |
| 364 | FALSE, /* pc_relative */ |
| 365 | 0, /* bitpos */ |
| 366 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 367 | 0, /* special_function */ |
| 368 | "R_RLA", /* name */ |
| 369 | TRUE, /* partial_inplace */ |
| 370 | 0xffff, /* src_mask */ |
| 371 | 0xffff, /* dst_mask */ |
| 372 | FALSE), /* pcrel_offset */ |
| 373 | |
| 374 | { 0xe }, |
| 375 | |
| 376 | /* Non-relocating reference. */ |
| 377 | HOWTO (0xf, /* type */ |
| 378 | 0, /* rightshift */ |
| 379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 380 | 32, /* bitsize */ |
| 381 | FALSE, /* pc_relative */ |
| 382 | 0, /* bitpos */ |
| 383 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 384 | 0, /* special_function */ |
| 385 | "R_REF", /* name */ |
| 386 | FALSE, /* partial_inplace */ |
| 387 | 0, /* src_mask */ |
| 388 | 0, /* dst_mask */ |
| 389 | FALSE), /* pcrel_offset */ |
| 390 | |
| 391 | { 0x10 }, |
| 392 | { 0x11 }, |
| 393 | |
| 394 | /* TOC relative indirect load. */ |
| 395 | HOWTO (0x12, /* type */ |
| 396 | 0, /* rightshift */ |
| 397 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 398 | 16, /* bitsize */ |
| 399 | FALSE, /* pc_relative */ |
| 400 | 0, /* bitpos */ |
| 401 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 402 | 0, /* special_function */ |
| 403 | "R_TRL", /* name */ |
| 404 | TRUE, /* partial_inplace */ |
| 405 | 0xffff, /* src_mask */ |
| 406 | 0xffff, /* dst_mask */ |
| 407 | FALSE), /* pcrel_offset */ |
| 408 | |
| 409 | /* TOC relative load address. */ |
| 410 | HOWTO (0x13, /* type */ |
| 411 | 0, /* rightshift */ |
| 412 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 413 | 16, /* bitsize */ |
| 414 | FALSE, /* pc_relative */ |
| 415 | 0, /* bitpos */ |
| 416 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 417 | 0, /* special_function */ |
| 418 | "R_TRLA", /* name */ |
| 419 | TRUE, /* partial_inplace */ |
| 420 | 0xffff, /* src_mask */ |
| 421 | 0xffff, /* dst_mask */ |
| 422 | FALSE), /* pcrel_offset */ |
| 423 | |
| 424 | /* Modifiable relative branch. */ |
| 425 | HOWTO (0x14, /* type */ |
| 426 | 1, /* rightshift */ |
| 427 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 428 | 32, /* bitsize */ |
| 429 | FALSE, /* pc_relative */ |
| 430 | 0, /* bitpos */ |
| 431 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 432 | 0, /* special_function */ |
| 433 | "R_RRTBI", /* name */ |
| 434 | TRUE, /* partial_inplace */ |
| 435 | 0xffffffff, /* src_mask */ |
| 436 | 0xffffffff, /* dst_mask */ |
| 437 | FALSE), /* pcrel_offset */ |
| 438 | |
| 439 | /* Modifiable absolute branch. */ |
| 440 | HOWTO (0x15, /* type */ |
| 441 | 1, /* rightshift */ |
| 442 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 443 | 32, /* bitsize */ |
| 444 | FALSE, /* pc_relative */ |
| 445 | 0, /* bitpos */ |
| 446 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 447 | 0, /* special_function */ |
| 448 | "R_RRTBA", /* name */ |
| 449 | TRUE, /* partial_inplace */ |
| 450 | 0xffffffff, /* src_mask */ |
| 451 | 0xffffffff, /* dst_mask */ |
| 452 | FALSE), /* pcrel_offset */ |
| 453 | |
| 454 | /* Modifiable call absolute indirect. */ |
| 455 | HOWTO (0x16, /* type */ |
| 456 | 0, /* rightshift */ |
| 457 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 458 | 16, /* bitsize */ |
| 459 | FALSE, /* pc_relative */ |
| 460 | 0, /* bitpos */ |
| 461 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 462 | 0, /* special_function */ |
| 463 | "R_CAI", /* name */ |
| 464 | TRUE, /* partial_inplace */ |
| 465 | 0xffff, /* src_mask */ |
| 466 | 0xffff, /* dst_mask */ |
| 467 | FALSE), /* pcrel_offset */ |
| 468 | |
| 469 | /* Modifiable call relative. */ |
| 470 | HOWTO (0x17, /* type */ |
| 471 | 0, /* rightshift */ |
| 472 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 473 | 16, /* bitsize */ |
| 474 | FALSE, /* pc_relative */ |
| 475 | 0, /* bitpos */ |
| 476 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 477 | 0, /* special_function */ |
| 478 | "R_REL", /* name */ |
| 479 | TRUE, /* partial_inplace */ |
| 480 | 0xffff, /* src_mask */ |
| 481 | 0xffff, /* dst_mask */ |
| 482 | FALSE), /* pcrel_offset */ |
| 483 | |
| 484 | /* Modifiable branch absolute. */ |
| 485 | HOWTO (0x18, /* type */ |
| 486 | 0, /* rightshift */ |
| 487 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 488 | 16, /* bitsize */ |
| 489 | FALSE, /* pc_relative */ |
| 490 | 0, /* bitpos */ |
| 491 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 492 | 0, /* special_function */ |
| 493 | "R_RBA", /* name */ |
| 494 | TRUE, /* partial_inplace */ |
| 495 | 0xffff, /* src_mask */ |
| 496 | 0xffff, /* dst_mask */ |
| 497 | FALSE), /* pcrel_offset */ |
| 498 | |
| 499 | /* Modifiable branch absolute. */ |
| 500 | HOWTO (0x19, /* type */ |
| 501 | 0, /* rightshift */ |
| 502 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 503 | 16, /* bitsize */ |
| 504 | FALSE, /* pc_relative */ |
| 505 | 0, /* bitpos */ |
| 506 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 507 | 0, /* special_function */ |
| 508 | "R_RBAC", /* name */ |
| 509 | TRUE, /* partial_inplace */ |
| 510 | 0xffff, /* src_mask */ |
| 511 | 0xffff, /* dst_mask */ |
| 512 | FALSE), /* pcrel_offset */ |
| 513 | |
| 514 | /* Modifiable branch relative. */ |
| 515 | HOWTO (0x1a, /* type */ |
| 516 | 0, /* rightshift */ |
| 517 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 518 | 26, /* bitsize */ |
| 519 | FALSE, /* pc_relative */ |
| 520 | 0, /* bitpos */ |
| 521 | complain_overflow_signed, /* complain_on_overflow */ |
| 522 | 0, /* special_function */ |
| 523 | "R_REL", /* name */ |
| 524 | TRUE, /* partial_inplace */ |
| 525 | 0xffff, /* src_mask */ |
| 526 | 0xffff, /* dst_mask */ |
| 527 | FALSE), /* pcrel_offset */ |
| 528 | |
| 529 | /* Modifiable branch absolute. */ |
| 530 | HOWTO (0x1b, /* type */ |
| 531 | 0, /* rightshift */ |
| 532 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 533 | 16, /* bitsize */ |
| 534 | FALSE, /* pc_relative */ |
| 535 | 0, /* bitpos */ |
| 536 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 537 | 0, /* special_function */ |
| 538 | "R_REL", /* name */ |
| 539 | TRUE, /* partial_inplace */ |
| 540 | 0xffff, /* src_mask */ |
| 541 | 0xffff, /* dst_mask */ |
| 542 | FALSE) /* pcrel_offset */ |
| 543 | }; |
| 544 | |
| 545 | #define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \ |
| 546 | / sizeof nlm_powerpc_howto_table[0]) |
| 547 | |
| 548 | /* Read a PowerPC NLM reloc. */ |
| 549 | |
| 550 | static bfd_boolean |
| 551 | nlm_powerpc_read_reloc (abfd, sym, secp, rel) |
| 552 | bfd *abfd; |
| 553 | nlmNAME(symbol_type) *sym; |
| 554 | asection **secp; |
| 555 | arelent *rel; |
| 556 | { |
| 557 | struct nlm32_powerpc_external_reloc ext; |
| 558 | bfd_vma l_vaddr; |
| 559 | unsigned long l_symndx; |
| 560 | int l_rtype; |
| 561 | int l_rsecnm; |
| 562 | asection *code_sec, *data_sec, *bss_sec; |
| 563 | |
| 564 | /* Read the reloc from the file. */ |
| 565 | if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| 566 | return FALSE; |
| 567 | |
| 568 | /* Swap in the fields. */ |
| 569 | l_vaddr = H_GET_32 (abfd, ext.l_vaddr); |
| 570 | l_symndx = H_GET_32 (abfd, ext.l_symndx); |
| 571 | l_rtype = H_GET_16 (abfd, ext.l_rtype); |
| 572 | l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm); |
| 573 | |
| 574 | /* Get the sections now, for convenience. */ |
| 575 | code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| 576 | data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| 577 | bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| 578 | |
| 579 | /* Work out the arelent fields. */ |
| 580 | if (sym != NULL) |
| 581 | { |
| 582 | /* This is an import. sym_ptr_ptr is filled in by |
| 583 | nlm_canonicalize_reloc. */ |
| 584 | rel->sym_ptr_ptr = NULL; |
| 585 | } |
| 586 | else |
| 587 | { |
| 588 | asection *sec; |
| 589 | |
| 590 | if (l_symndx == 0) |
| 591 | sec = code_sec; |
| 592 | else if (l_symndx == 1) |
| 593 | sec = data_sec; |
| 594 | else if (l_symndx == 2) |
| 595 | sec = bss_sec; |
| 596 | else |
| 597 | { |
| 598 | bfd_set_error (bfd_error_bad_value); |
| 599 | return FALSE; |
| 600 | } |
| 601 | |
| 602 | rel->sym_ptr_ptr = sec->symbol_ptr_ptr; |
| 603 | } |
| 604 | |
| 605 | rel->addend = 0; |
| 606 | |
| 607 | BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT); |
| 608 | |
| 609 | rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff); |
| 610 | |
| 611 | BFD_ASSERT (rel->howto->name != NULL |
| 612 | && ((l_rtype & 0x8000) != 0 |
| 613 | ? (rel->howto->complain_on_overflow |
| 614 | == complain_overflow_signed) |
| 615 | : (rel->howto->complain_on_overflow |
| 616 | == complain_overflow_bitfield)) |
| 617 | && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1); |
| 618 | |
| 619 | if (l_rsecnm == 0) |
| 620 | *secp = code_sec; |
| 621 | else if (l_rsecnm == 1) |
| 622 | { |
| 623 | *secp = data_sec; |
| 624 | l_vaddr -= bfd_section_size (abfd, code_sec); |
| 625 | } |
| 626 | else |
| 627 | { |
| 628 | bfd_set_error (bfd_error_bad_value); |
| 629 | return FALSE; |
| 630 | } |
| 631 | |
| 632 | rel->address = l_vaddr; |
| 633 | |
| 634 | return TRUE; |
| 635 | } |
| 636 | |
| 637 | #endif /* OLDFORMAT */ |
| 638 | |
| 639 | /* Mangle PowerPC NLM relocs for output. */ |
| 640 | |
| 641 | static bfd_boolean |
| 642 | nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count) |
| 643 | bfd *abfd ATTRIBUTE_UNUSED; |
| 644 | asection *sec ATTRIBUTE_UNUSED; |
| 645 | const PTR data ATTRIBUTE_UNUSED; |
| 646 | bfd_vma offset ATTRIBUTE_UNUSED; |
| 647 | bfd_size_type count ATTRIBUTE_UNUSED; |
| 648 | { |
| 649 | return TRUE; |
| 650 | } |
| 651 | |
| 652 | /* Read a PowerPC NLM import record */ |
| 653 | |
| 654 | static bfd_boolean |
| 655 | nlm_powerpc_read_import (abfd, sym) |
| 656 | bfd *abfd; |
| 657 | nlmNAME(symbol_type) *sym; |
| 658 | { |
| 659 | struct nlm_relent *nlm_relocs; /* relocation records for symbol */ |
| 660 | bfd_size_type rcount; /* number of relocs */ |
| 661 | bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */ |
| 662 | unsigned char symlength; /* length of symbol name */ |
| 663 | char *name; |
| 664 | |
| 665 | if (bfd_bread ((PTR) &symlength, (bfd_size_type) sizeof (symlength), abfd) |
| 666 | != sizeof (symlength)) |
| 667 | return FALSE; |
| 668 | sym -> symbol.the_bfd = abfd; |
| 669 | name = bfd_alloc (abfd, (bfd_size_type) symlength + 1); |
| 670 | if (name == NULL) |
| 671 | return FALSE; |
| 672 | if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength) |
| 673 | return FALSE; |
| 674 | name[symlength] = '\0'; |
| 675 | sym -> symbol.name = name; |
| 676 | sym -> symbol.flags = 0; |
| 677 | sym -> symbol.value = 0; |
| 678 | sym -> symbol.section = bfd_und_section_ptr; |
| 679 | if (bfd_bread ((PTR) temp, (bfd_size_type) sizeof (temp), abfd) |
| 680 | != sizeof (temp)) |
| 681 | return FALSE; |
| 682 | rcount = H_GET_32 (abfd, temp); |
| 683 | nlm_relocs = ((struct nlm_relent *) |
| 684 | bfd_alloc (abfd, rcount * sizeof (struct nlm_relent))); |
| 685 | if (nlm_relocs == (struct nlm_relent *) NULL) |
| 686 | return FALSE; |
| 687 | sym -> relocs = nlm_relocs; |
| 688 | sym -> rcnt = 0; |
| 689 | while (sym -> rcnt < rcount) |
| 690 | { |
| 691 | asection *section; |
| 692 | |
| 693 | if (! nlm_powerpc_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc)) |
| 694 | return FALSE; |
| 695 | nlm_relocs -> section = section; |
| 696 | nlm_relocs++; |
| 697 | sym -> rcnt++; |
| 698 | } |
| 699 | return TRUE; |
| 700 | } |
| 701 | |
| 702 | #ifndef OLDFORMAT |
| 703 | |
| 704 | /* Write a PowerPC NLM reloc. */ |
| 705 | |
| 706 | static bfd_boolean |
| 707 | nlm_powerpc_write_import (abfd, sec, rel) |
| 708 | bfd *abfd; |
| 709 | asection *sec; |
| 710 | arelent *rel; |
| 711 | { |
| 712 | asymbol *sym; |
| 713 | bfd_vma val; |
| 714 | bfd_byte temp[4]; |
| 715 | |
| 716 | /* PowerPC NetWare only supports one kind of reloc. */ |
| 717 | if (rel->addend != 0 |
| 718 | || rel->howto == NULL |
| 719 | || rel->howto->rightshift != 0 |
| 720 | || rel->howto->size != 2 |
| 721 | || rel->howto->bitsize != 32 |
| 722 | || rel->howto->bitpos != 0 |
| 723 | || rel->howto->pc_relative |
| 724 | || (rel->howto->src_mask != 0xffffffff && rel->addend != 0) |
| 725 | || rel->howto->dst_mask != 0xffffffff) |
| 726 | { |
| 727 | bfd_set_error (bfd_error_invalid_operation); |
| 728 | return FALSE; |
| 729 | } |
| 730 | |
| 731 | sym = *rel->sym_ptr_ptr; |
| 732 | |
| 733 | /* The value we write out is the offset into the appropriate |
| 734 | segment, rightshifted by two. This offset is the section vma, |
| 735 | adjusted by the vma of the lowest section in that segment, plus |
| 736 | the address of the relocation. */ |
| 737 | val = bfd_get_section_vma (abfd, sec) + rel->address; |
| 738 | if ((val & 3) != 0) |
| 739 | { |
| 740 | bfd_set_error (bfd_error_bad_value); |
| 741 | return FALSE; |
| 742 | } |
| 743 | val >>= 2; |
| 744 | |
| 745 | /* The high bit is 0 if the reloc is in the data section, or 1 if |
| 746 | the reloc is in the code section. */ |
| 747 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA) |
| 748 | val -= nlm_get_data_low (abfd); |
| 749 | else |
| 750 | { |
| 751 | val -= nlm_get_text_low (abfd); |
| 752 | val |= NLM_HIBIT; |
| 753 | } |
| 754 | |
| 755 | if (! bfd_is_und_section (bfd_get_section (sym))) |
| 756 | { |
| 757 | /* This is an internal relocation fixup. The second most |
| 758 | significant bit is 0 if this is a reloc against the data |
| 759 | segment, or 1 if it is a reloc against the text segment. */ |
| 760 | if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE) |
| 761 | val |= NLM_HIBIT >> 1; |
| 762 | } |
| 763 | |
| 764 | bfd_put_32 (abfd, val, temp); |
| 765 | if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| 766 | return FALSE; |
| 767 | |
| 768 | return TRUE; |
| 769 | } |
| 770 | |
| 771 | #else /* OLDFORMAT */ |
| 772 | |
| 773 | /* This is used for the reloc handling in the old format. */ |
| 774 | |
| 775 | /* Write a PowerPC NLM reloc. */ |
| 776 | |
| 777 | static bfd_boolean |
| 778 | nlm_powerpc_write_reloc (abfd, sec, rel, indx) |
| 779 | bfd *abfd; |
| 780 | asection *sec; |
| 781 | arelent *rel; |
| 782 | int indx; |
| 783 | { |
| 784 | struct nlm32_powerpc_external_reloc ext; |
| 785 | asection *code_sec, *data_sec, *bss_sec; |
| 786 | asymbol *sym; |
| 787 | asection *symsec; |
| 788 | unsigned long l_symndx; |
| 789 | int l_rtype; |
| 790 | int l_rsecnm; |
| 791 | reloc_howto_type *howto; |
| 792 | bfd_size_type address; |
| 793 | |
| 794 | /* Get the sections now, for convenience. */ |
| 795 | code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| 796 | data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| 797 | bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| 798 | |
| 799 | sym = *rel->sym_ptr_ptr; |
| 800 | symsec = bfd_get_section (sym); |
| 801 | if (indx != -1) |
| 802 | { |
| 803 | BFD_ASSERT (bfd_is_und_section (symsec)); |
| 804 | l_symndx = indx + 3; |
| 805 | } |
| 806 | else |
| 807 | { |
| 808 | if (symsec == code_sec) |
| 809 | l_symndx = 0; |
| 810 | else if (symsec == data_sec) |
| 811 | l_symndx = 1; |
| 812 | else if (symsec == bss_sec) |
| 813 | l_symndx = 2; |
| 814 | else |
| 815 | { |
| 816 | bfd_set_error (bfd_error_bad_value); |
| 817 | return FALSE; |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | H_PUT_32 (abfd, l_symndx, ext.l_symndx); |
| 822 | |
| 823 | for (howto = nlm_powerpc_howto_table; |
| 824 | howto < nlm_powerpc_howto_table + HOWTO_COUNT; |
| 825 | howto++) |
| 826 | { |
| 827 | if (howto->rightshift == rel->howto->rightshift |
| 828 | && howto->size == rel->howto->size |
| 829 | && howto->bitsize == rel->howto->bitsize |
| 830 | && howto->pc_relative == rel->howto->pc_relative |
| 831 | && howto->bitpos == rel->howto->bitpos |
| 832 | && (howto->partial_inplace == rel->howto->partial_inplace |
| 833 | || (! rel->howto->partial_inplace |
| 834 | && rel->addend == 0)) |
| 835 | && (howto->src_mask == rel->howto->src_mask |
| 836 | || (rel->howto->src_mask == 0 |
| 837 | && rel->addend == 0)) |
| 838 | && howto->dst_mask == rel->howto->dst_mask |
| 839 | && howto->pcrel_offset == rel->howto->pcrel_offset) |
| 840 | break; |
| 841 | } |
| 842 | if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT) |
| 843 | { |
| 844 | bfd_set_error (bfd_error_bad_value); |
| 845 | return FALSE; |
| 846 | } |
| 847 | |
| 848 | l_rtype = howto->type; |
| 849 | if (howto->complain_on_overflow == complain_overflow_signed) |
| 850 | l_rtype |= 0x8000; |
| 851 | l_rtype |= (howto->bitsize - 1) << 8; |
| 852 | H_PUT_16 (abfd, l_rtype, ext.l_rtype); |
| 853 | |
| 854 | address = rel->address; |
| 855 | |
| 856 | if (sec == code_sec) |
| 857 | l_rsecnm = 0; |
| 858 | else if (sec == data_sec) |
| 859 | { |
| 860 | l_rsecnm = 1; |
| 861 | address += bfd_section_size (abfd, code_sec); |
| 862 | } |
| 863 | else |
| 864 | { |
| 865 | bfd_set_error (bfd_error_bad_value); |
| 866 | return FALSE; |
| 867 | } |
| 868 | |
| 869 | H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm); |
| 870 | H_PUT_32 (abfd, address, ext.l_vaddr); |
| 871 | |
| 872 | if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| 873 | return FALSE; |
| 874 | |
| 875 | return TRUE; |
| 876 | } |
| 877 | |
| 878 | /* Write a PowerPC NLM import. */ |
| 879 | |
| 880 | static bfd_boolean |
| 881 | nlm_powerpc_write_import (abfd, sec, rel) |
| 882 | bfd *abfd; |
| 883 | asection *sec; |
| 884 | arelent *rel; |
| 885 | { |
| 886 | return nlm_powerpc_write_reloc (abfd, sec, rel, -1); |
| 887 | } |
| 888 | |
| 889 | #endif /* OLDFORMAT */ |
| 890 | |
| 891 | /* Write a PowerPC NLM external symbol. This routine keeps a static |
| 892 | count of the symbol index. FIXME: I don't know if this is |
| 893 | necessary, and the index never gets reset. */ |
| 894 | |
| 895 | static bfd_boolean |
| 896 | nlm_powerpc_write_external (abfd, count, sym, relocs) |
| 897 | bfd *abfd; |
| 898 | bfd_size_type count; |
| 899 | asymbol *sym; |
| 900 | struct reloc_and_sec *relocs; |
| 901 | { |
| 902 | unsigned int i; |
| 903 | bfd_byte len; |
| 904 | unsigned char temp[NLM_TARGET_LONG_SIZE]; |
| 905 | #ifdef OLDFORMAT |
| 906 | static int indx; |
| 907 | #endif |
| 908 | |
| 909 | len = strlen (sym->name); |
| 910 | if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd) |
| 911 | != sizeof (bfd_byte)) |
| 912 | || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len) |
| 913 | return FALSE; |
| 914 | |
| 915 | bfd_put_32 (abfd, count, temp); |
| 916 | if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| 917 | return FALSE; |
| 918 | |
| 919 | for (i = 0; i < count; i++) |
| 920 | { |
| 921 | #ifndef OLDFORMAT |
| 922 | if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel)) |
| 923 | return FALSE; |
| 924 | #else |
| 925 | if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec, |
| 926 | relocs[i].rel, indx)) |
| 927 | return FALSE; |
| 928 | #endif |
| 929 | } |
| 930 | |
| 931 | #ifdef OLDFORMAT |
| 932 | ++indx; |
| 933 | #endif |
| 934 | |
| 935 | return TRUE; |
| 936 | } |
| 937 | \f |
| 938 | #ifndef OLDFORMAT |
| 939 | |
| 940 | /* PowerPC Netware uses a word offset, not a byte offset, for public |
| 941 | symbols. */ |
| 942 | |
| 943 | /* Set the section for a public symbol. */ |
| 944 | |
| 945 | static bfd_boolean |
| 946 | nlm_powerpc_set_public_section (abfd, sym) |
| 947 | bfd *abfd; |
| 948 | nlmNAME(symbol_type) *sym; |
| 949 | { |
| 950 | if (sym->symbol.value & NLM_HIBIT) |
| 951 | { |
| 952 | sym->symbol.value &= ~NLM_HIBIT; |
| 953 | sym->symbol.flags |= BSF_FUNCTION; |
| 954 | sym->symbol.section = |
| 955 | bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| 956 | } |
| 957 | else |
| 958 | { |
| 959 | sym->symbol.section = |
| 960 | bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| 961 | } |
| 962 | |
| 963 | sym->symbol.value <<= 2; |
| 964 | |
| 965 | return TRUE; |
| 966 | } |
| 967 | |
| 968 | /* Get the offset to write out for a public symbol. */ |
| 969 | |
| 970 | static bfd_vma |
| 971 | nlm_powerpc_get_public_offset (abfd, sym) |
| 972 | bfd *abfd; |
| 973 | asymbol *sym; |
| 974 | { |
| 975 | bfd_vma offset; |
| 976 | asection *sec; |
| 977 | |
| 978 | offset = bfd_asymbol_value (sym); |
| 979 | sec = bfd_get_section (sym); |
| 980 | if (sec->flags & SEC_CODE) |
| 981 | { |
| 982 | offset -= nlm_get_text_low (abfd); |
| 983 | offset |= NLM_HIBIT; |
| 984 | } |
| 985 | else if (sec->flags & (SEC_DATA | SEC_ALLOC)) |
| 986 | { |
| 987 | /* SEC_ALLOC is for the .bss section. */ |
| 988 | offset -= nlm_get_data_low (abfd); |
| 989 | } |
| 990 | else |
| 991 | { |
| 992 | /* We can't handle an exported symbol that is not in the code or |
| 993 | data segment. */ |
| 994 | bfd_set_error (bfd_error_invalid_operation); |
| 995 | /* FIXME: No way to return error. */ |
| 996 | abort (); |
| 997 | } |
| 998 | |
| 999 | return offset; |
| 1000 | } |
| 1001 | |
| 1002 | #endif /* ! defined (OLDFORMAT) */ |
| 1003 | \f |
| 1004 | #include "nlmswap.h" |
| 1005 | |
| 1006 | static const struct nlm_backend_data nlm32_powerpc_backend = |
| 1007 | { |
| 1008 | "NetWare PowerPC Module \032", |
| 1009 | sizeof (Nlm32_powerpc_External_Fixed_Header), |
| 1010 | #ifndef OLDFORMAT |
| 1011 | 0, /* optional_prefix_size */ |
| 1012 | #else |
| 1013 | sizeof (struct nlm32_powerpc_external_prefix_header), |
| 1014 | #endif |
| 1015 | bfd_arch_powerpc, |
| 1016 | 0, |
| 1017 | FALSE, |
| 1018 | #ifndef OLDFORMAT |
| 1019 | 0, /* backend_object_p */ |
| 1020 | 0, /* write_prefix */ |
| 1021 | #else |
| 1022 | nlm_powerpc_backend_object_p, |
| 1023 | nlm_powerpc_write_prefix, |
| 1024 | #endif |
| 1025 | nlm_powerpc_read_reloc, |
| 1026 | nlm_powerpc_mangle_relocs, |
| 1027 | nlm_powerpc_read_import, |
| 1028 | nlm_powerpc_write_import, |
| 1029 | #ifndef OLDFORMAT |
| 1030 | nlm_powerpc_set_public_section, |
| 1031 | nlm_powerpc_get_public_offset, |
| 1032 | #else |
| 1033 | 0, /* set_public_section */ |
| 1034 | 0, /* get_public_offset */ |
| 1035 | #endif |
| 1036 | nlm_swap_fixed_header_in, |
| 1037 | nlm_swap_fixed_header_out, |
| 1038 | nlm_powerpc_write_external, |
| 1039 | 0, /* write_export */ |
| 1040 | }; |
| 1041 | |
| 1042 | #define TARGET_BIG_NAME "nlm32-powerpc" |
| 1043 | #define TARGET_BIG_SYM nlmNAME(powerpc_vec) |
| 1044 | #define TARGET_BACKEND_DATA &nlm32_powerpc_backend |
| 1045 | |
| 1046 | #include "nlm-target.h" |