| 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 | 0xffff, /* src_mask */ |
| 110 | 0xffff, /* 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_elf_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_zmalloc (amt); |
| 452 | if (ret == (struct xgate_elf_link_hash_table *) NULL) |
| 453 | return NULL; |
| 454 | |
| 455 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 456 | _bfd_elf_link_hash_newfunc, sizeof(struct elf_link_hash_entry), |
| 457 | XGATE_ELF_DATA)) |
| 458 | { |
| 459 | free (ret); |
| 460 | return NULL; |
| 461 | } |
| 462 | |
| 463 | /* Init the stub hash table too. */ |
| 464 | amt = sizeof(struct bfd_hash_table); |
| 465 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_zmalloc (amt); |
| 466 | if (ret->stub_hash_table == NULL) |
| 467 | { |
| 468 | free (ret); |
| 469 | return NULL; |
| 470 | } |
| 471 | |
| 472 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, |
| 473 | sizeof(struct elf32_xgate_stub_hash_entry))) |
| 474 | { |
| 475 | free (ret->stub_hash_table); |
| 476 | free (ret); |
| 477 | return NULL; |
| 478 | } |
| 479 | |
| 480 | return &ret->root.root; |
| 481 | } |
| 482 | |
| 483 | static bfd_boolean |
| 484 | xgate_elf_set_mach_from_flags (bfd *abfd ATTRIBUTE_UNUSED) |
| 485 | { |
| 486 | return TRUE; |
| 487 | } |
| 488 | |
| 489 | /* Specific sections: |
| 490 | - The .page0 is a data section that is mapped in [0x0000..0x00FF]. |
| 491 | Page0 accesses are faster on the M68HC12. |
| 492 | - The .vectors is the section that represents the interrupt |
| 493 | vectors. |
| 494 | - The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */ |
| 495 | static const struct bfd_elf_special_section elf32_xgate_special_sections[] = |
| 496 | { |
| 497 | { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 498 | { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 499 | { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 500 | { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 501 | /*{ STRING_COMMA_LEN (".xgate"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 502 | TODO finish this implementation */ |
| 503 | { NULL, 0, 0, 0, 0 } |
| 504 | }; |
| 505 | |
| 506 | struct xgate_scan_param |
| 507 | { |
| 508 | struct xgate_page_info* pinfo; |
| 509 | bfd_boolean use_memory_banks; |
| 510 | }; |
| 511 | |
| 512 | /* Assorted hash table functions. */ |
| 513 | |
| 514 | /* Initialize an entry in the stub hash table. */ |
| 515 | |
| 516 | static struct bfd_hash_entry * |
| 517 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 518 | struct bfd_hash_table *table ATTRIBUTE_UNUSED, |
| 519 | const char *string ATTRIBUTE_UNUSED) |
| 520 | { |
| 521 | return entry; |
| 522 | } |
| 523 | |
| 524 | /* Hook called by the linker routine which adds symbols from an object |
| 525 | file. */ |
| 526 | |
| 527 | bfd_boolean |
| 528 | elf32_xgate_add_symbol_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 529 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 530 | Elf_Internal_Sym *sym, |
| 531 | const char **namep ATTRIBUTE_UNUSED, |
| 532 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 533 | asection **secp ATTRIBUTE_UNUSED, |
| 534 | bfd_vma *valp ATTRIBUTE_UNUSED) |
| 535 | { |
| 536 | /* For some reason the st_target_internal value is not retained |
| 537 | after xgate_frob_symbol is called, hence this temp hack. */ |
| 538 | sym->st_target_internal = 1; |
| 539 | return TRUE; |
| 540 | } |
| 541 | |
| 542 | /* External entry points for sizing and building linker stubs. */ |
| 543 | |
| 544 | /* Set up various things so that we can make a list of input sections |
| 545 | for each output section included in the link. Returns -1 on error, |
| 546 | 0 when no stubs will be needed, and 1 on success. */ |
| 547 | |
| 548 | int |
| 549 | elf32_xgate_setup_section_lists (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 550 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 551 | { |
| 552 | return 1; |
| 553 | } |
| 554 | |
| 555 | /* Determine and set the size of the stub section for a final link. |
| 556 | The basic idea here is to examine all the relocations looking for |
| 557 | PC-relative calls to a target that is unreachable with any "9-bit PC-REL" |
| 558 | instruction. */ |
| 559 | |
| 560 | bfd_boolean |
| 561 | elf32_xgate_size_stubs (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 562 | bfd *stub_bfd ATTRIBUTE_UNUSED, |
| 563 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 564 | asection * (*add_stub_section) (const char*, asection*) ATTRIBUTE_UNUSED) |
| 565 | { |
| 566 | return FALSE; |
| 567 | } |
| 568 | |
| 569 | /* Build all the stubs associated with the current output file. The |
| 570 | stubs are kept in a hash table attached to the main linker hash |
| 571 | table. This function is called via xgateelf_finish in the |
| 572 | linker. */ |
| 573 | |
| 574 | bfd_boolean |
| 575 | elf32_xgate_build_stubs (bfd *abfd ATTRIBUTE_UNUSED, |
| 576 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 577 | { |
| 578 | return TRUE; |
| 579 | } |
| 580 | |
| 581 | void |
| 582 | xgate_elf_get_bank_parameters (struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 583 | { |
| 584 | return; |
| 585 | } |
| 586 | |
| 587 | /* This function is used for relocs which are only used for relaxing, |
| 588 | which the linker should otherwise ignore. */ |
| 589 | |
| 590 | bfd_reloc_status_type |
| 591 | xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 592 | arelent *reloc_entry, |
| 593 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 594 | void *data ATTRIBUTE_UNUSED, |
| 595 | asection *input_section, |
| 596 | bfd *output_bfd, |
| 597 | char **error_message ATTRIBUTE_UNUSED) |
| 598 | { |
| 599 | if (output_bfd != NULL) |
| 600 | reloc_entry->address += input_section->output_offset; |
| 601 | return bfd_reloc_ok; |
| 602 | } |
| 603 | |
| 604 | bfd_reloc_status_type |
| 605 | xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 606 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 607 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 608 | void *data ATTRIBUTE_UNUSED, |
| 609 | asection *input_section ATTRIBUTE_UNUSED, |
| 610 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 611 | char **error_message ATTRIBUTE_UNUSED) |
| 612 | { |
| 613 | abort (); |
| 614 | } |
| 615 | |
| 616 | /* Look through the relocs for a section during the first phase. |
| 617 | Since we don't do .gots or .plts, we just need to consider the |
| 618 | virtual table relocs for gc. */ |
| 619 | |
| 620 | bfd_boolean |
| 621 | elf32_xgate_check_relocs (bfd *abfd ATTRIBUTE_UNUSED, |
| 622 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 623 | asection *sec ATTRIBUTE_UNUSED, |
| 624 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 625 | { |
| 626 | return TRUE; |
| 627 | } |
| 628 | |
| 629 | /* Relocate a XGATE/S12x ELF section. */ |
| 630 | |
| 631 | bfd_boolean |
| 632 | elf32_xgate_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 633 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 634 | bfd *input_bfd ATTRIBUTE_UNUSED, |
| 635 | asection *input_section ATTRIBUTE_UNUSED, |
| 636 | bfd_byte *contents ATTRIBUTE_UNUSED, |
| 637 | Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED, |
| 638 | Elf_Internal_Sym *local_syms ATTRIBUTE_UNUSED, |
| 639 | asection **local_sections ATTRIBUTE_UNUSED) |
| 640 | { |
| 641 | return TRUE; |
| 642 | } |
| 643 | |
| 644 | /* Set and control ELF flags in ELF header. */ |
| 645 | |
| 646 | bfd_boolean |
| 647 | _bfd_xgate_elf_set_private_flags (bfd *abfd ATTRIBUTE_UNUSED, |
| 648 | flagword flags ATTRIBUTE_UNUSED) |
| 649 | { |
| 650 | return TRUE; |
| 651 | } |
| 652 | |
| 653 | /* Merge backend specific data from an object file to the output |
| 654 | object file when linking. */ |
| 655 | |
| 656 | bfd_boolean |
| 657 | _bfd_xgate_elf_merge_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| 658 | bfd *obfd ATTRIBUTE_UNUSED) |
| 659 | { |
| 660 | return TRUE; |
| 661 | } |
| 662 | |
| 663 | bfd_boolean |
| 664 | _bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| 665 | { |
| 666 | FILE *file = (FILE *) ptr; |
| 667 | |
| 668 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 669 | |
| 670 | /* Print normal ELF private data. */ |
| 671 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 672 | |
| 673 | /* xgettext:c-format */ |
| 674 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 675 | |
| 676 | if (elf_elfheader (abfd)->e_flags & E_XGATE_I32) |
| 677 | fprintf (file, _("[abi=32-bit int, ")); |
| 678 | else |
| 679 | fprintf (file, _("[abi=16-bit int, ")); |
| 680 | |
| 681 | if (elf_elfheader (abfd)->e_flags & E_XGATE_F64) |
| 682 | fprintf (file, _("64-bit double, ")); |
| 683 | else |
| 684 | fprintf (file, _("32-bit double, ")); |
| 685 | if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH) |
| 686 | fprintf (file, _("cpu=XGATE]")); |
| 687 | else |
| 688 | fprintf (file, _("error reading cpu type from elf private data")); |
| 689 | fputc ('\n', file); |
| 690 | |
| 691 | return TRUE; |
| 692 | } |
| 693 | |
| 694 | void |
| 695 | elf32_xgate_post_process_headers (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *link_info ATTRIBUTE_UNUSED) |
| 696 | { |
| 697 | |
| 698 | } |
| 699 | |
| 700 | #define ELF_ARCH bfd_arch_xgate |
| 701 | #define ELF_MACHINE_CODE EM_XGATE |
| 702 | #define ELF_TARGET_ID XGATE_ELF_DATA |
| 703 | |
| 704 | #define ELF_MAXPAGESIZE 0x1000 |
| 705 | |
| 706 | #define TARGET_BIG_SYM bfd_elf32_xgate_vec |
| 707 | #define TARGET_BIG_NAME "elf32-xgate" |
| 708 | |
| 709 | #define elf_info_to_howto 0 |
| 710 | #define elf_info_to_howto_rel xgate_info_to_howto_rel |
| 711 | #define elf_backend_check_relocs elf32_xgate_check_relocs |
| 712 | #define elf_backend_relocate_section elf32_xgate_relocate_section |
| 713 | #define elf_backend_object_p xgate_elf_set_mach_from_flags |
| 714 | #define elf_backend_final_write_processing 0 |
| 715 | #define elf_backend_can_gc_sections 1 |
| 716 | #define elf_backend_special_sections elf32_xgate_special_sections |
| 717 | #define elf_backend_post_process_headers elf32_xgate_post_process_headers |
| 718 | #define elf_backend_add_symbol_hook elf32_xgate_add_symbol_hook |
| 719 | |
| 720 | #define bfd_elf32_bfd_link_hash_table_create xgate_elf_bfd_link_hash_table_create |
| 721 | #define bfd_elf32_bfd_link_hash_table_free xgate_elf_bfd_link_hash_table_free |
| 722 | #define bfd_elf32_bfd_merge_private_bfd_data _bfd_xgate_elf_merge_private_bfd_data |
| 723 | #define bfd_elf32_bfd_set_private_flags _bfd_xgate_elf_set_private_flags |
| 724 | #define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data |
| 725 | |
| 726 | #define xgate_stub_hash_lookup(table, string, create, copy) \ |
| 727 | ((struct elf32_xgate_stub_hash_entry *) \ |
| 728 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 729 | |
| 730 | #include "elf32-target.h" |