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| 1 /* Freescale XGATE-specific support for 32-bit ELF |
| 2 Copyright 2010, 2011, 2012 |
| 3 Free Software Foundation, Inc. |
| 4 Contributed by Sean Keys(skeys@ipdatasys.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 "elf-bfd.h" |
| 28 #include "elf32-xgate.h" |
| 29 #include "elf/xgate.h" |
| 30 #include "opcode/xgate.h" |
| 31 #include "libiberty.h" |
| 32 |
| 33 /* Relocation functions. */ |
| 34 static reloc_howto_type * |
| 35 bfd_elf32_bfd_reloc_type_lookup (bfd *, bfd_reloc_code_real_type); |
| 36 static reloc_howto_type * |
| 37 bfd_elf32_bfd_reloc_name_lookup (bfd *, const char *); |
| 38 static void |
| 39 xgate_info_to_howto_rel (bfd *, arelent *, Elf_Internal_Rela *); |
| 40 static bfd_boolean |
| 41 xgate_elf_set_mach_from_flags (bfd *); |
| 42 static struct bfd_hash_entry * |
| 43 stub_hash_newfunc (struct bfd_hash_entry *, struct bfd_hash_table *, |
| 44 const char *); |
| 45 static struct bfd_link_hash_table* |
| 46 xgate_elf_bfd_link_hash_table_create (bfd *); |
| 47 |
| 48 /* Use REL instead of RELA to save space */ |
| 49 #define USE_REL 1 |
| 50 |
| 51 static reloc_howto_type elf_xgate_howto_table[] = |
| 52 { |
| 53 /* This reloc does nothing. */ |
| 54 HOWTO (R_XGATE_NONE, /* type */ |
| 55 0, /* rightshift */ |
| 56 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 57 32, /* bitsize */ |
| 58 FALSE, /* pc_relative */ |
| 59 0, /* bitpos */ |
| 60 complain_overflow_dont,/* complain_on_overflow */ |
| 61 bfd_elf_generic_reloc, /* special_function */ |
| 62 "R_XGATE_NONE", /* name */ |
| 63 FALSE, /* partial_inplace */ |
| 64 0, /* src_mask */ |
| 65 0, /* dst_mask */ |
| 66 FALSE), /* pcrel_offset */ |
| 67 |
| 68 /* A 8 bit absolute relocation. */ |
| 69 HOWTO (R_XGATE_8, /* type */ |
| 70 0, /* rightshift */ |
| 71 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 72 8, /* bitsize */ |
| 73 FALSE, /* pc_relative */ |
| 74 0, /* bitpos */ |
| 75 complain_overflow_bitfield, /* complain_on_overflow */ |
| 76 bfd_elf_generic_reloc, /* special_function */ |
| 77 "R_XGATE_8", /* name */ |
| 78 FALSE, /* partial_inplace */ |
| 79 0x00ff, /* src_mask */ |
| 80 0x00ff, /* dst_mask */ |
| 81 FALSE), /* pcrel_offset */ |
| 82 |
| 83 /* A 8 bit PC-rel relocation. */ |
| 84 HOWTO (R_XGATE_PCREL_8, /* type */ |
| 85 0, /* rightshift */ |
| 86 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 87 8, /* bitsize */ |
| 88 TRUE, /* pc_relative */ |
| 89 0, /* bitpos */ |
| 90 complain_overflow_bitfield, /* complain_on_overflow */ |
| 91 bfd_elf_generic_reloc, /* special_function */ |
| 92 "R_XGATE_PCREL_8", /* name */ |
| 93 FALSE, /* partial_inplace */ |
| 94 0x00ff, /* src_mask */ |
| 95 0x00ff, /* dst_mask */ |
| 96 TRUE), /* pcrel_offset */ |
| 97 |
| 98 /* A 16 bit absolute relocation. */ |
| 99 HOWTO (R_XGATE_16, /* type */ |
| 100 0, /* rightshift */ |
| 101 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 102 16, /* bitsize */ |
| 103 FALSE, /* pc_relative */ |
| 104 0, /* bitpos */ |
| 105 complain_overflow_dont /*bitfield */, /* complain_on_overflow */ |
| 106 bfd_elf_generic_reloc, /* special_function */ |
| 107 "R_XGATE_16", /* name */ |
| 108 FALSE, /* partial_inplace */ |
| 109 0x00ff, /* src_mask */ |
| 110 0x00ff, /* dst_mask */ |
| 111 FALSE), /* pcrel_offset */ |
| 112 |
| 113 /* A 32 bit absolute relocation. This one is never used for the |
| 114 code relocation. It's used by gas for -gstabs generation. */ |
| 115 HOWTO (R_XGATE_32, /* type */ |
| 116 0, /* rightshift */ |
| 117 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 118 32, /* bitsize */ |
| 119 FALSE, /* pc_relative */ |
| 120 0, /* bitpos */ |
| 121 complain_overflow_bitfield, /* complain_on_overflow */ |
| 122 bfd_elf_generic_reloc, /* special_function */ |
| 123 "R_XGATE_32", /* name */ |
| 124 FALSE, /* partial_inplace */ |
| 125 0xffffffff, /* src_mask */ |
| 126 0xffffffff, /* dst_mask */ |
| 127 FALSE), /* pcrel_offset */ |
| 128 |
| 129 /* A 16 bit PC-rel relocation. */ |
| 130 HOWTO (R_XGATE_PCREL_16, /* type */ |
| 131 0, /* rightshift */ |
| 132 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 133 16, /* bitsize */ |
| 134 TRUE, /* pc_relative */ |
| 135 0, /* bitpos */ |
| 136 complain_overflow_dont, /* complain_on_overflow */ |
| 137 bfd_elf_generic_reloc, /* special_function */ |
| 138 "R_XGATE_PCREL_16", /* name */ |
| 139 FALSE, /* partial_inplace */ |
| 140 0xffff, /* src_mask */ |
| 141 0xffff, /* dst_mask */ |
| 142 TRUE), /* pcrel_offset */ |
| 143 |
| 144 /* GNU extension to record C++ vtable hierarchy. */ |
| 145 HOWTO (R_XGATE_GNU_VTINHERIT, /* type */ |
| 146 0, /* rightshift */ |
| 147 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 148 0, /* bitsize */ |
| 149 FALSE, /* pc_relative */ |
| 150 0, /* bitpos */ |
| 151 complain_overflow_dont, /* complain_on_overflow */ |
| 152 NULL, /* special_function */ |
| 153 "R_XGATE_GNU_VTINHERIT", /* name */ |
| 154 FALSE, /* partial_inplace */ |
| 155 0, /* src_mask */ |
| 156 0, /* dst_mask */ |
| 157 FALSE), /* pcrel_offset */ |
| 158 |
| 159 /* GNU extension to record C++ vtable member usage. */ |
| 160 HOWTO (R_XGATE_GNU_VTENTRY, /* type */ |
| 161 0, /* rightshift */ |
| 162 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 163 0, /* bitsize */ |
| 164 FALSE, /* pc_relative */ |
| 165 0, /* bitpos */ |
| 166 complain_overflow_dont, /* complain_on_overflow */ |
| 167 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 168 "R_XGATE_GNU_VTENTRY", /* name */ |
| 169 FALSE, /* partial_inplace */ |
| 170 0, /* src_mask */ |
| 171 0, /* dst_mask */ |
| 172 FALSE), /* pcrel_offset */ |
| 173 |
| 174 /* A 24 bit relocation. */ |
| 175 HOWTO (R_XGATE_24, /* type */ |
| 176 0, /* rightshift */ |
| 177 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 178 16, /* bitsize */ |
| 179 FALSE, /* pc_relative */ |
| 180 0, /* bitpos */ |
| 181 complain_overflow_dont, /* complain_on_overflow */ |
| 182 bfd_elf_generic_reloc, /* special_function */ |
| 183 "R_XGATE_IMM8_LO", /* name */ |
| 184 FALSE, /* partial_inplace */ |
| 185 0x00ff, /* src_mask */ |
| 186 0x00ff, /* dst_mask */ |
| 187 FALSE), /* pcrel_offset */ |
| 188 |
| 189 /* A 16-bit low relocation. */ |
| 190 HOWTO (R_XGATE_LO16, /* type */ |
| 191 8, /* rightshift */ |
| 192 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 193 16, /* bitsize */ |
| 194 FALSE, /* pc_relative */ |
| 195 0, /* bitpos */ |
| 196 complain_overflow_dont, /* complain_on_overflow */ |
| 197 bfd_elf_generic_reloc, /* special_function */ |
| 198 "R_XGATE_IMM8_HI", /* name */ |
| 199 FALSE, /* partial_inplace */ |
| 200 0x00ff, /* src_mask */ |
| 201 0x00ff, /* dst_mask */ |
| 202 FALSE), /* pcrel_offset */ |
| 203 |
| 204 /* A page relocation. */ |
| 205 HOWTO (R_XGATE_GPAGE, /* type */ |
| 206 0, /* rightshift */ |
| 207 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 208 8, /* bitsize */ |
| 209 FALSE, /* pc_relative */ |
| 210 0, /* bitpos */ |
| 211 complain_overflow_dont, /* complain_on_overflow */ |
| 212 xgate_elf_special_reloc,/* special_function */ |
| 213 "R_XGATE_GPAGE", /* name */ |
| 214 FALSE, /* partial_inplace */ |
| 215 0x00ff, /* src_mask */ |
| 216 0x00ff, /* dst_mask */ |
| 217 FALSE), /* pcrel_offset */ |
| 218 |
| 219 /* A 9 bit absolute relocation. */ |
| 220 HOWTO (R_XGATE_PCREL_9, /* type */ |
| 221 0, /* rightshift */ |
| 222 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 223 9, /* bitsize */ |
| 224 TRUE, /* pc_relative */ |
| 225 0, /* bitpos */ |
| 226 complain_overflow_bitfield, /* complain_on_overflow */ |
| 227 bfd_elf_generic_reloc, /* special_function */ |
| 228 "R_XGATE_PCREL_9", /* name */ |
| 229 FALSE, /* partial_inplace */ |
| 230 0xffff, /* src_mask */ |
| 231 0xffff, /* dst_mask */ |
| 232 TRUE), /* pcrel_offset */ |
| 233 |
| 234 /* A 8 bit absolute relocation (upper address). */ |
| 235 HOWTO (R_XGATE_PCREL_10, /* type */ |
| 236 8, /* rightshift */ |
| 237 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 238 10, /* bitsize */ |
| 239 TRUE, /* pc_relative */ |
| 240 0, /* bitpos */ |
| 241 complain_overflow_dont, /* complain_on_overflow */ |
| 242 bfd_elf_generic_reloc, /* special_function */ |
| 243 "R_XGATE_PCREL_10", /* name */ |
| 244 FALSE, /* partial_inplace */ |
| 245 0x00ff, /* src_mask */ |
| 246 0x00ff, /* dst_mask */ |
| 247 TRUE), /* pcrel_offset */ |
| 248 |
| 249 /* A 8 bit absolute relocation. */ |
| 250 HOWTO (R_XGATE_IMM8_LO, /* type */ |
| 251 0, /* rightshift */ |
| 252 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 253 16, /* bitsize */ |
| 254 FALSE, /* pc_relative */ |
| 255 0, /* bitpos */ |
| 256 complain_overflow_dont, /* complain_on_overflow */ |
| 257 bfd_elf_generic_reloc, /* special_function */ |
| 258 "R_XGATE_IMM8_LO", /* name */ |
| 259 FALSE, /* partial_inplace */ |
| 260 0xffff, /* src_mask */ |
| 261 0xffff, /* dst_mask */ |
| 262 FALSE), /* pcrel_offset */ |
| 263 |
| 264 /* A 16 bit absolute relocation (upper address). */ |
| 265 HOWTO (R_XGATE_IMM8_HI, /* type */ |
| 266 8, /* rightshift */ |
| 267 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 268 16, /* bitsize */ |
| 269 FALSE, /* pc_relative */ |
| 270 0, /* bitpos */ |
| 271 complain_overflow_dont, /* complain_on_overflow */ |
| 272 bfd_elf_generic_reloc, /* special_function */ |
| 273 "R_XGATE_IMM8_HI", /* name */ |
| 274 FALSE, /* partial_inplace */ |
| 275 0x00ff, /* src_mask */ |
| 276 0x00ff, /* dst_mask */ |
| 277 FALSE), /* pcrel_offset */ |
| 278 |
| 279 /* A 3 bit absolute relocation. */ |
| 280 HOWTO (R_XGATE_IMM3, /* type */ |
| 281 8, /* rightshift */ |
| 282 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 283 16, /* bitsize */ |
| 284 FALSE, /* pc_relative */ |
| 285 0, /* bitpos */ |
| 286 complain_overflow_dont, /* complain_on_overflow */ |
| 287 bfd_elf_generic_reloc, /* special_function */ |
| 288 "R_XGATE_IMM3", /* name */ |
| 289 FALSE, /* partial_inplace */ |
| 290 0x00ff, /* src_mask */ |
| 291 0x00ff, /* dst_mask */ |
| 292 FALSE), /* pcrel_offset */ |
| 293 |
| 294 /* A 4 bit absolute relocation. */ |
| 295 HOWTO (R_XGATE_IMM4, /* type */ |
| 296 8, /* rightshift */ |
| 297 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 298 16, /* bitsize */ |
| 299 FALSE, /* pc_relative */ |
| 300 0, /* bitpos */ |
| 301 complain_overflow_dont, /* complain_on_overflow */ |
| 302 bfd_elf_generic_reloc, /* special_function */ |
| 303 "R_XGATE_IMM4", /* name */ |
| 304 FALSE, /* partial_inplace */ |
| 305 0x00ff, /* src_mask */ |
| 306 0x00ff, /* dst_mask */ |
| 307 FALSE), /* pcrel_offset */ |
| 308 |
| 309 /* A 5 bit absolute relocation. */ |
| 310 HOWTO (R_XGATE_IMM5, /* type */ |
| 311 8, /* rightshift */ |
| 312 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 313 16, /* bitsize */ |
| 314 FALSE, /* pc_relative */ |
| 315 0, /* bitpos */ |
| 316 complain_overflow_dont, /* complain_on_overflow */ |
| 317 bfd_elf_generic_reloc, /* special_function */ |
| 318 "R_XGATE_IMM5", /* name */ |
| 319 FALSE, /* partial_inplace */ |
| 320 0x00ff, /* src_mask */ |
| 321 0x00ff, /* dst_mask */ |
| 322 FALSE), /* pcrel_offset */ |
| 323 |
| 324 /* Mark beginning of a jump instruction (any form). */ |
| 325 HOWTO (R_XGATE_RL_JUMP, /* type */ |
| 326 0, /* rightshift */ |
| 327 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 328 0, /* bitsize */ |
| 329 FALSE, /* pc_relative */ |
| 330 0, /* bitpos */ |
| 331 complain_overflow_dont, /* complain_on_overflow */ |
| 332 xgate_elf_ignore_reloc, /* special_function */ |
| 333 "R_XGATE_RL_JUMP", /* name */ |
| 334 TRUE, /* partial_inplace */ |
| 335 0, /* src_mask */ |
| 336 0, /* dst_mask */ |
| 337 TRUE), /* pcrel_offset */ |
| 338 |
| 339 /* Mark beginning of Gcc relaxation group instruction. */ |
| 340 HOWTO (R_XGATE_RL_GROUP, /* type */ |
| 341 0, /* rightshift */ |
| 342 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 343 0, /* bitsize */ |
| 344 FALSE, /* pc_relative */ |
| 345 0, /* bitpos */ |
| 346 complain_overflow_dont, /* complain_on_overflow */ |
| 347 xgate_elf_ignore_reloc, /* special_function */ |
| 348 "R_XGATE_RL_GROUP", /* name */ |
| 349 TRUE, /* partial_inplace */ |
| 350 0, /* src_mask */ |
| 351 0, /* dst_mask */ |
| 352 TRUE), /* pcrel_offset */ |
| 353 }; |
| 354 |
| 355 /* Map BFD reloc types to XGATE ELF reloc types. */ |
| 356 |
| 357 struct xgate_reloc_map |
| 358 { |
| 359 bfd_reloc_code_real_type bfd_reloc_val; |
| 360 unsigned char elf_reloc_val; |
| 361 }; |
| 362 |
| 363 static const struct xgate_reloc_map xgate_reloc_map[] = |
| 364 { |
| 365 {BFD_RELOC_NONE, R_XGATE_NONE}, |
| 366 {BFD_RELOC_8, R_XGATE_8}, |
| 367 {BFD_RELOC_8_PCREL, R_XGATE_PCREL_8}, |
| 368 {BFD_RELOC_16_PCREL, R_XGATE_PCREL_16}, |
| 369 {BFD_RELOC_16, R_XGATE_16}, |
| 370 {BFD_RELOC_32, R_XGATE_32}, |
| 371 |
| 372 {BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT}, |
| 373 {BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY}, |
| 374 |
| 375 {BFD_RELOC_XGATE_LO16, R_XGATE_LO16}, |
| 376 {BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE}, |
| 377 {BFD_RELOC_XGATE_24, R_XGATE_24}, |
| 378 {BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9}, |
| 379 {BFD_RELOC_XGATE_PCREL_10, R_XGATE_PCREL_10}, |
| 380 {BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO}, |
| 381 {BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI}, |
| 382 {BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3}, |
| 383 {BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4}, |
| 384 {BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5}, |
| 385 |
| 386 {BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP}, |
| 387 {BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP}, |
| 388 }; |
| 389 |
| 390 static reloc_howto_type * |
| 391 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 392 bfd_reloc_code_real_type code) |
| 393 { |
| 394 unsigned int i; |
| 395 |
| 396 for (i = 0; i < ARRAY_SIZE (xgate_reloc_map); i++) |
| 397 if (xgate_reloc_map[i].bfd_reloc_val == code) |
| 398 return &elf_xgate_howto_table[xgate_reloc_map[i].elf_reloc_val]; |
| 399 |
| 400 return NULL; |
| 401 } |
| 402 |
| 403 static reloc_howto_type * |
| 404 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| 405 { |
| 406 unsigned int i; |
| 407 |
| 408 for (i = 0; i < ARRAY_SIZE (elf_xgate_howto_table); i++) |
| 409 if (elf_xgate_howto_table[i].name != NULL |
| 410 && strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0) |
| 411 return &elf_xgate_howto_table[i]; |
| 412 |
| 413 return NULL; |
| 414 } |
| 415 |
| 416 /* Set the howto pointer for an XGATE ELF reloc. */ |
| 417 |
| 418 static void |
| 419 xgate_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, |
| 420 arelent *cache_ptr, |
| 421 Elf_Internal_Rela *dst) |
| 422 { |
| 423 unsigned int r_type; |
| 424 |
| 425 r_type = ELF32_R_TYPE (dst->r_info); |
| 426 BFD_ASSERT(r_type < (unsigned int) R_XGATE_max); |
| 427 cache_ptr->howto = &elf_xgate_howto_table[r_type]; |
| 428 } |
| 429 |
| 430 /* Free the derived linker hash table. */ |
| 431 |
| 432 void |
| 433 xgate_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash) |
| 434 { |
| 435 struct xgate_elf_link_hash_table *ret = |
| 436 (struct xgate_elf_link_hash_table *) hash; |
| 437 |
| 438 bfd_hash_table_free (ret->stub_hash_table); |
| 439 free (ret->stub_hash_table); |
| 440 _bfd_generic_link_hash_table_free (hash); |
| 441 } |
| 442 |
| 443 /* Create a XGATE ELF linker hash table. */ |
| 444 |
| 445 static struct bfd_link_hash_table* |
| 446 xgate_elf_bfd_link_hash_table_create (bfd *abfd) |
| 447 { |
| 448 struct xgate_elf_link_hash_table *ret; |
| 449 bfd_size_type amt = sizeof(struct xgate_elf_link_hash_table); |
| 450 |
| 451 ret = (struct xgate_elf_link_hash_table *) bfd_malloc (amt); |
| 452 if (ret == (struct xgate_elf_link_hash_table *) NULL) |
| 453 return NULL; |
| 454 |
| 455 memset (ret, 0, amt); |
| 456 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 457 _bfd_elf_link_hash_newfunc, sizeof(struct elf_link_hash_entry), |
| 458 XGATE_ELF_DATA)) |
| 459 { |
| 460 free (ret); |
| 461 return NULL; |
| 462 } |
| 463 |
| 464 /* Init the stub hash table too. */ |
| 465 amt = sizeof(struct bfd_hash_table); |
| 466 ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); |
| 467 if (ret->stub_hash_table == NULL) |
| 468 { |
| 469 free (ret); |
| 470 return NULL; |
| 471 } |
| 472 |
| 473 if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, |
| 474 sizeof(struct elf32_xgate_stub_hash_entry))) |
| 475 return NULL; |
| 476 |
| 477 ret->stub_bfd = NULL; |
| 478 ret->stub_section = 0; |
| 479 ret->add_stub_section = NULL; |
| 480 ret->sym_cache.abfd = NULL; |
| 481 |
| 482 return &ret->root.root; |
| 483 } |
| 484 |
| 485 static bfd_boolean |
| 486 xgate_elf_set_mach_from_flags (bfd *abfd ATTRIBUTE_UNUSED) |
| 487 { |
| 488 return TRUE; |
| 489 } |
| 490 |
| 491 /* Specific sections: |
| 492 - The .page0 is a data section that is mapped in [0x0000..0x00FF]. |
| 493 Page0 accesses are faster on the M68HC12. |
| 494 - The .vectors is the section that represents the interrupt |
| 495 vectors. |
| 496 - The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */ |
| 497 static const struct bfd_elf_special_section elf32_xgate_special_sections[] = |
| 498 { |
| 499 { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 500 { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 501 { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 502 { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 503 /*{ STRING_COMMA_LEN (".xgate"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 504 TODO finish this implementation */ |
| 505 { NULL, 0, 0, 0, 0 } |
| 506 }; |
| 507 |
| 508 struct xgate_scan_param |
| 509 { |
| 510 struct xgate_page_info* pinfo; |
| 511 bfd_boolean use_memory_banks; |
| 512 }; |
| 513 |
| 514 /* Assorted hash table functions. */ |
| 515 |
| 516 /* Initialize an entry in the stub hash table. */ |
| 517 |
| 518 static struct bfd_hash_entry * |
| 519 stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 520 struct bfd_hash_table *table ATTRIBUTE_UNUSED, |
| 521 const char *string ATTRIBUTE_UNUSED) |
| 522 { |
| 523 return entry; |
| 524 } |
| 525 |
| 526 /* Hook called by the linker routine which adds symbols from an object |
| 527 file. */ |
| 528 |
| 529 bfd_boolean |
| 530 elf32_xgate_add_symbol_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 531 struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 532 Elf_Internal_Sym *sym, |
| 533 const char **namep ATTRIBUTE_UNUSED, |
| 534 flagword *flagsp ATTRIBUTE_UNUSED, |
| 535 asection **secp ATTRIBUTE_UNUSED, |
| 536 bfd_vma *valp ATTRIBUTE_UNUSED) |
| 537 { |
| 538 /* For some reason the st_target_internal value is not retained |
| 539 after xgate_frob_symbol is called, hence this temp hack. */ |
| 540 sym->st_target_internal = 1; |
| 541 return TRUE; |
| 542 } |
| 543 |
| 544 /* External entry points for sizing and building linker stubs. */ |
| 545 |
| 546 /* Set up various things so that we can make a list of input sections |
| 547 for each output section included in the link. Returns -1 on error, |
| 548 0 when no stubs will be needed, and 1 on success. */ |
| 549 |
| 550 int |
| 551 elf32_xgate_setup_section_lists (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 552 struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 553 { |
| 554 return 1; |
| 555 } |
| 556 |
| 557 /* Determine and set the size of the stub section for a final link. |
| 558 The basic idea here is to examine all the relocations looking for |
| 559 PC-relative calls to a target that is unreachable with any "9-bit PC-REL" |
| 560 instruction. */ |
| 561 |
| 562 bfd_boolean |
| 563 elf32_xgate_size_stubs (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 564 bfd *stub_bfd ATTRIBUTE_UNUSED, |
| 565 struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 566 asection * (*add_stub_section) (const char*, asection*)
ATTRIBUTE_UNUSED) |
| 567 { |
| 568 return FALSE; |
| 569 } |
| 570 |
| 571 /* Build all the stubs associated with the current output file. The |
| 572 stubs are kept in a hash table attached to the main linker hash |
| 573 table. This function is called via xgateelf_finish in the |
| 574 linker. */ |
| 575 |
| 576 bfd_boolean |
| 577 elf32_xgate_build_stubs (bfd *abfd ATTRIBUTE_UNUSED, |
| 578 struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 579 { |
| 580 return TRUE; |
| 581 } |
| 582 |
| 583 void |
| 584 xgate_elf_get_bank_parameters (struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 585 { |
| 586 return; |
| 587 } |
| 588 |
| 589 /* This function is used for relocs which are only used for relaxing, |
| 590 which the linker should otherwise ignore. */ |
| 591 |
| 592 bfd_reloc_status_type |
| 593 xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 594 arelent *reloc_entry, |
| 595 asymbol *symbol ATTRIBUTE_UNUSED, |
| 596 void *data ATTRIBUTE_UNUSED, |
| 597 asection *input_section, |
| 598 bfd *output_bfd, |
| 599 char **error_message ATTRIBUTE_UNUSED) |
| 600 { |
| 601 if (output_bfd != NULL) |
| 602 reloc_entry->address += input_section->output_offset; |
| 603 return bfd_reloc_ok; |
| 604 } |
| 605 |
| 606 bfd_reloc_status_type |
| 607 xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 608 arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 609 asymbol *symbol ATTRIBUTE_UNUSED, |
| 610 void *data ATTRIBUTE_UNUSED, |
| 611 asection *input_section ATTRIBUTE_UNUSED, |
| 612 bfd *output_bfd ATTRIBUTE_UNUSED, |
| 613 char **error_message ATTRIBUTE_UNUSED) |
| 614 { |
| 615 abort (); |
| 616 } |
| 617 |
| 618 /* Look through the relocs for a section during the first phase. |
| 619 Since we don't do .gots or .plts, we just need to consider the |
| 620 virtual table relocs for gc. */ |
| 621 |
| 622 bfd_boolean |
| 623 elf32_xgate_check_relocs (bfd *abfd ATTRIBUTE_UNUSED, |
| 624 struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 625 asection *sec ATTRIBUTE_UNUSED, |
| 626 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 627 { |
| 628 return TRUE; |
| 629 } |
| 630 |
| 631 /* Relocate a XGATE/S12x ELF section. */ |
| 632 |
| 633 bfd_boolean |
| 634 elf32_xgate_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 635 struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 636 bfd *input_bfd ATTRIBUTE_UNUSED, |
| 637 asection *input_section ATTRIBUTE_UNUSED, |
| 638 bfd_byte *contents ATTRIBUTE_UNUSED, |
| 639 Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED, |
| 640 Elf_Internal_Sym *local_syms ATTRIBUTE_UNUSED, |
| 641 asection **local_sections ATTRIBUTE_UNUSED) |
| 642 { |
| 643 return TRUE; |
| 644 } |
| 645 |
| 646 /* Set and control ELF flags in ELF header. */ |
| 647 |
| 648 bfd_boolean |
| 649 _bfd_xgate_elf_set_private_flags (bfd *abfd ATTRIBUTE_UNUSED, |
| 650 flagword flags ATTRIBUTE_UNUSED) |
| 651 { |
| 652 return TRUE; |
| 653 } |
| 654 |
| 655 /* Merge backend specific data from an object file to the output |
| 656 object file when linking. */ |
| 657 |
| 658 bfd_boolean |
| 659 _bfd_xgate_elf_merge_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| 660 bfd *obfd ATTRIBUTE_UNUSED) |
| 661 { |
| 662 return TRUE; |
| 663 } |
| 664 |
| 665 bfd_boolean |
| 666 _bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| 667 { |
| 668 FILE *file = (FILE *) ptr; |
| 669 |
| 670 BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 671 |
| 672 /* Print normal ELF private data. */ |
| 673 _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 674 |
| 675 /* xgettext:c-format */ |
| 676 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 677 |
| 678 if (elf_elfheader (abfd)->e_flags & E_XGATE_I32) |
| 679 fprintf (file, _("[abi=32-bit int, ")); |
| 680 else |
| 681 fprintf (file, _("[abi=16-bit int, ")); |
| 682 |
| 683 if (elf_elfheader (abfd)->e_flags & E_XGATE_F64) |
| 684 fprintf (file, _("64-bit double, ")); |
| 685 else |
| 686 fprintf (file, _("32-bit double, ")); |
| 687 if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH) |
| 688 fprintf (file, _("cpu=XGATE]")); |
| 689 else |
| 690 fprintf (file, _("error reading cpu type from elf private data")); |
| 691 fputc ('\n', file); |
| 692 |
| 693 return TRUE; |
| 694 } |
| 695 |
| 696 void |
| 697 elf32_xgate_post_process_headers (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_in
fo *link_info ATTRIBUTE_UNUSED) |
| 698 { |
| 699 |
| 700 } |
| 701 |
| 702 #define ELF_ARCH bfd_arch_xgate |
| 703 #define ELF_MACHINE_CODE EM_XGATE |
| 704 #define ELF_TARGET_ID XGATE_ELF_DATA |
| 705 |
| 706 #define ELF_MAXPAGESIZE 0x1000 |
| 707 |
| 708 #define TARGET_BIG_SYM bfd_elf32_xgate_vec |
| 709 #define TARGET_BIG_NAME "elf32-xgate" |
| 710 |
| 711 #define elf_info_to_howto 0 |
| 712 #define elf_info_to_howto_rel xgate_info_to_howto_rel |
| 713 #define elf_backend_check_relocs elf32_xgate_check_relocs |
| 714 #define elf_backend_relocate_section elf32_xgate_relocate_section |
| 715 #define elf_backend_object_p xgate_elf_set_mach_from_flags |
| 716 #define elf_backend_final_write_processing 0 |
| 717 #define elf_backend_can_gc_sections 1 |
| 718 #define elf_backend_special_sections elf32_xgate_special_sections |
| 719 #define elf_backend_post_process_headers elf32_xgate_post_process_headers |
| 720 #define elf_backend_add_symbol_hook elf32_xgate_add_symbol_hook |
| 721 |
| 722 #define bfd_elf32_bfd_link_hash_table_create xgate_elf_bfd_link_hash_table_creat
e |
| 723 #define bfd_elf32_bfd_link_hash_table_free xgate_elf_bfd_link_hash_table_free |
| 724 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_xgate_elf_merge_private_bfd_da
ta |
| 725 #define bfd_elf32_bfd_set_private_flags _bfd_xgate_elf_set_private_flags |
| 726 #define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_da
ta |
| 727 |
| 728 #define xgate_stub_hash_lookup(table, string, create, copy) \ |
| 729 ((struct elf32_xgate_stub_hash_entry *) \ |
| 730 bfd_hash_lookup ((table), (string), (create), (copy))) |
| 731 |
| 732 #include "elf32-target.h" |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 11969036:
Merge GDB 7.5.1 (Closed)
Base URL: http://git.chromium.org/native_client/nacl-gdb.git@master