| 1 | /* Lattice Mico32-specific support for 32-bit ELF |
| 2 | Copyright (C) 2008-2020 Free Software Foundation, Inc. |
| 3 | Contributed by Jon Beniston <jon@beniston.com> |
| 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/lm32.h" |
| 27 | |
| 28 | #define DEFAULT_STACK_SIZE 0x20000 |
| 29 | |
| 30 | #define PLT_ENTRY_SIZE 20 |
| 31 | |
| 32 | #define PLT0_ENTRY_WORD0 0 |
| 33 | #define PLT0_ENTRY_WORD1 0 |
| 34 | #define PLT0_ENTRY_WORD2 0 |
| 35 | #define PLT0_ENTRY_WORD3 0 |
| 36 | #define PLT0_ENTRY_WORD4 0 |
| 37 | |
| 38 | #define PLT0_PIC_ENTRY_WORD0 0 |
| 39 | #define PLT0_PIC_ENTRY_WORD1 0 |
| 40 | #define PLT0_PIC_ENTRY_WORD2 0 |
| 41 | #define PLT0_PIC_ENTRY_WORD3 0 |
| 42 | #define PLT0_PIC_ENTRY_WORD4 0 |
| 43 | |
| 44 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
| 45 | |
| 46 | extern const bfd_target lm32_elf32_fdpic_vec; |
| 47 | |
| 48 | #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) |
| 49 | |
| 50 | static bfd_reloc_status_type lm32_elf_gprel_reloc |
| 51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 52 | |
| 53 | /* lm32 ELF linker hash table. */ |
| 54 | |
| 55 | struct elf_lm32_link_hash_table |
| 56 | { |
| 57 | struct elf_link_hash_table root; |
| 58 | |
| 59 | /* Short-cuts to get to dynamic linker sections. */ |
| 60 | asection *sfixup32; |
| 61 | asection *sdynbss; |
| 62 | asection *srelbss; |
| 63 | |
| 64 | int relocs32; |
| 65 | }; |
| 66 | |
| 67 | /* Get the lm32 ELF linker hash table from a link_info structure. */ |
| 68 | |
| 69 | #define lm32_elf_hash_table(p) \ |
| 70 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 71 | == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL) |
| 72 | |
| 73 | #define lm32fdpic_got_section(info) \ |
| 74 | (lm32_elf_hash_table (info)->root.sgot) |
| 75 | #define lm32fdpic_gotrel_section(info) \ |
| 76 | (lm32_elf_hash_table (info)->root.srelgot) |
| 77 | #define lm32fdpic_fixup32_section(info) \ |
| 78 | (lm32_elf_hash_table (info)->sfixup32) |
| 79 | |
| 80 | struct weak_symbol_list |
| 81 | { |
| 82 | const char *name; |
| 83 | struct weak_symbol_list *next; |
| 84 | }; |
| 85 | |
| 86 | /* Create an lm32 ELF linker hash table. */ |
| 87 | |
| 88 | static struct bfd_link_hash_table * |
| 89 | lm32_elf_link_hash_table_create (bfd *abfd) |
| 90 | { |
| 91 | struct elf_lm32_link_hash_table *ret; |
| 92 | size_t amt = sizeof (struct elf_lm32_link_hash_table); |
| 93 | |
| 94 | ret = bfd_zmalloc (amt); |
| 95 | if (ret == NULL) |
| 96 | return NULL; |
| 97 | |
| 98 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 99 | _bfd_elf_link_hash_newfunc, |
| 100 | sizeof (struct elf_link_hash_entry), |
| 101 | LM32_ELF_DATA)) |
| 102 | { |
| 103 | free (ret); |
| 104 | return NULL; |
| 105 | } |
| 106 | |
| 107 | return &ret->root.root; |
| 108 | } |
| 109 | |
| 110 | /* Add a fixup to the ROFIXUP section. */ |
| 111 | |
| 112 | static bfd_vma |
| 113 | _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) |
| 114 | { |
| 115 | bfd_vma fixup_offset; |
| 116 | |
| 117 | if (rofixup->flags & SEC_EXCLUDE) |
| 118 | return -1; |
| 119 | |
| 120 | fixup_offset = rofixup->reloc_count * 4; |
| 121 | if (rofixup->contents) |
| 122 | { |
| 123 | BFD_ASSERT (fixup_offset < rofixup->size); |
| 124 | if (fixup_offset < rofixup->size) |
| 125 | bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); |
| 126 | } |
| 127 | rofixup->reloc_count++; |
| 128 | |
| 129 | return fixup_offset; |
| 130 | } |
| 131 | |
| 132 | /* Create .rofixup sections in DYNOBJ, and set up |
| 133 | shortcuts to them in our hash table. */ |
| 134 | |
| 135 | static bfd_boolean |
| 136 | create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) |
| 137 | { |
| 138 | struct elf_lm32_link_hash_table *htab; |
| 139 | htab = lm32_elf_hash_table (info); |
| 140 | |
| 141 | if (htab == NULL) |
| 142 | return FALSE; |
| 143 | |
| 144 | /* Fixup section for R_LM32_32 relocs. */ |
| 145 | lm32fdpic_fixup32_section (info) |
| 146 | = bfd_make_section_anyway_with_flags (dynobj, |
| 147 | ".rofixup", |
| 148 | (SEC_ALLOC |
| 149 | | SEC_LOAD |
| 150 | | SEC_HAS_CONTENTS |
| 151 | | SEC_IN_MEMORY |
| 152 | | SEC_LINKER_CREATED |
| 153 | | SEC_READONLY)); |
| 154 | if (lm32fdpic_fixup32_section (info) == NULL |
| 155 | || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2)) |
| 156 | return FALSE; |
| 157 | |
| 158 | return TRUE; |
| 159 | } |
| 160 | |
| 161 | static reloc_howto_type lm32_elf_howto_table [] = |
| 162 | { |
| 163 | /* This reloc does nothing. */ |
| 164 | HOWTO (R_LM32_NONE, /* type */ |
| 165 | 0, /* rightshift */ |
| 166 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 167 | 0, /* bitsize */ |
| 168 | FALSE, /* pc_relative */ |
| 169 | 0, /* bitpos */ |
| 170 | complain_overflow_dont, /* complain_on_overflow */ |
| 171 | bfd_elf_generic_reloc, /* special_function */ |
| 172 | "R_LM32_NONE", /* name */ |
| 173 | FALSE, /* partial_inplace */ |
| 174 | 0, /* src_mask */ |
| 175 | 0, /* dst_mask */ |
| 176 | FALSE), /* pcrel_offset */ |
| 177 | |
| 178 | /* An 8 bit absolute relocation. */ |
| 179 | HOWTO (R_LM32_8, /* type */ |
| 180 | 0, /* rightshift */ |
| 181 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 8, /* bitsize */ |
| 183 | FALSE, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 186 | bfd_elf_generic_reloc, /* special_function */ |
| 187 | "R_LM32_8", /* name */ |
| 188 | FALSE, /* partial_inplace */ |
| 189 | 0, /* src_mask */ |
| 190 | 0xff, /* dst_mask */ |
| 191 | FALSE), /* pcrel_offset */ |
| 192 | |
| 193 | /* A 16 bit absolute relocation. */ |
| 194 | HOWTO (R_LM32_16, /* type */ |
| 195 | 0, /* rightshift */ |
| 196 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 16, /* bitsize */ |
| 198 | FALSE, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_LM32_16", /* name */ |
| 203 | FALSE, /* partial_inplace */ |
| 204 | 0, /* src_mask */ |
| 205 | 0xffff, /* dst_mask */ |
| 206 | FALSE), /* pcrel_offset */ |
| 207 | |
| 208 | /* A 32 bit absolute relocation. */ |
| 209 | HOWTO (R_LM32_32, /* type */ |
| 210 | 0, /* rightshift */ |
| 211 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 212 | 32, /* bitsize */ |
| 213 | FALSE, /* pc_relative */ |
| 214 | 0, /* bitpos */ |
| 215 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 216 | bfd_elf_generic_reloc, /* special_function */ |
| 217 | "R_LM32_32", /* name */ |
| 218 | FALSE, /* partial_inplace */ |
| 219 | 0, /* src_mask */ |
| 220 | 0xffffffff, /* dst_mask */ |
| 221 | FALSE), /* pcrel_offset */ |
| 222 | |
| 223 | HOWTO (R_LM32_HI16, /* type */ |
| 224 | 16, /* rightshift */ |
| 225 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 226 | 16, /* bitsize */ |
| 227 | FALSE, /* pc_relative */ |
| 228 | 0, /* bitpos */ |
| 229 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 230 | bfd_elf_generic_reloc, /* special_function */ |
| 231 | "R_LM32_HI16", /* name */ |
| 232 | FALSE, /* partial_inplace */ |
| 233 | 0, /* src_mask */ |
| 234 | 0xffff, /* dst_mask */ |
| 235 | FALSE), /* pcrel_offset */ |
| 236 | |
| 237 | HOWTO (R_LM32_LO16, /* type */ |
| 238 | 0, /* rightshift */ |
| 239 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 240 | 16, /* bitsize */ |
| 241 | FALSE, /* pc_relative */ |
| 242 | 0, /* bitpos */ |
| 243 | complain_overflow_dont, /* complain_on_overflow */ |
| 244 | bfd_elf_generic_reloc, /* special_function */ |
| 245 | "R_LM32_LO16", /* name */ |
| 246 | FALSE, /* partial_inplace */ |
| 247 | 0, /* src_mask */ |
| 248 | 0xffff, /* dst_mask */ |
| 249 | FALSE), /* pcrel_offset */ |
| 250 | |
| 251 | HOWTO (R_LM32_GPREL16, /* type */ |
| 252 | 0, /* rightshift */ |
| 253 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 254 | 16, /* bitsize */ |
| 255 | FALSE, /* pc_relative */ |
| 256 | 0, /* bitpos */ |
| 257 | complain_overflow_dont, /* complain_on_overflow */ |
| 258 | lm32_elf_gprel_reloc, /* special_function */ |
| 259 | "R_LM32_GPREL16", /* name */ |
| 260 | FALSE, /* partial_inplace */ |
| 261 | 0, /* src_mask */ |
| 262 | 0xffff, /* dst_mask */ |
| 263 | FALSE), /* pcrel_offset */ |
| 264 | |
| 265 | HOWTO (R_LM32_CALL, /* type */ |
| 266 | 2, /* rightshift */ |
| 267 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 268 | 26, /* bitsize */ |
| 269 | TRUE, /* pc_relative */ |
| 270 | 0, /* bitpos */ |
| 271 | complain_overflow_signed, /* complain_on_overflow */ |
| 272 | bfd_elf_generic_reloc, /* special_function */ |
| 273 | "R_LM32_CALL", /* name */ |
| 274 | FALSE, /* partial_inplace */ |
| 275 | 0, /* src_mask */ |
| 276 | 0x3ffffff, /* dst_mask */ |
| 277 | TRUE), /* pcrel_offset */ |
| 278 | |
| 279 | HOWTO (R_LM32_BRANCH, /* type */ |
| 280 | 2, /* rightshift */ |
| 281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 282 | 16, /* bitsize */ |
| 283 | TRUE, /* pc_relative */ |
| 284 | 0, /* bitpos */ |
| 285 | complain_overflow_signed, /* complain_on_overflow */ |
| 286 | bfd_elf_generic_reloc, /* special_function */ |
| 287 | "R_LM32_BRANCH", /* name */ |
| 288 | FALSE, /* partial_inplace */ |
| 289 | 0, /* src_mask */ |
| 290 | 0xffff, /* dst_mask */ |
| 291 | TRUE), /* pcrel_offset */ |
| 292 | |
| 293 | /* GNU extension to record C++ vtable hierarchy. */ |
| 294 | HOWTO (R_LM32_GNU_VTINHERIT, /* type */ |
| 295 | 0, /* rightshift */ |
| 296 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 297 | 0, /* bitsize */ |
| 298 | FALSE, /* pc_relative */ |
| 299 | 0, /* bitpos */ |
| 300 | complain_overflow_dont, /* complain_on_overflow */ |
| 301 | NULL, /* special_function */ |
| 302 | "R_LM32_GNU_VTINHERIT", /* name */ |
| 303 | FALSE, /* partial_inplace */ |
| 304 | 0, /* src_mask */ |
| 305 | 0, /* dst_mask */ |
| 306 | FALSE), /* pcrel_offset */ |
| 307 | |
| 308 | /* GNU extension to record C++ vtable member usage. */ |
| 309 | HOWTO (R_LM32_GNU_VTENTRY, /* type */ |
| 310 | 0, /* rightshift */ |
| 311 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 312 | 0, /* bitsize */ |
| 313 | FALSE, /* pc_relative */ |
| 314 | 0, /* bitpos */ |
| 315 | complain_overflow_dont, /* complain_on_overflow */ |
| 316 | _bfd_elf_rel_vtable_reloc_fn,/* special_function */ |
| 317 | "R_LM32_GNU_VTENTRY", /* name */ |
| 318 | FALSE, /* partial_inplace */ |
| 319 | 0, /* src_mask */ |
| 320 | 0, /* dst_mask */ |
| 321 | FALSE), /* pcrel_offset */ |
| 322 | |
| 323 | HOWTO (R_LM32_16_GOT, /* type */ |
| 324 | 0, /* rightshift */ |
| 325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 326 | 16, /* bitsize */ |
| 327 | FALSE, /* pc_relative */ |
| 328 | 0, /* bitpos */ |
| 329 | complain_overflow_signed, /* complain_on_overflow */ |
| 330 | bfd_elf_generic_reloc, /* special_function */ |
| 331 | "R_LM32_16_GOT", /* name */ |
| 332 | FALSE, /* partial_inplace */ |
| 333 | 0, /* src_mask */ |
| 334 | 0xffff, /* dst_mask */ |
| 335 | FALSE), /* pcrel_offset */ |
| 336 | |
| 337 | HOWTO (R_LM32_GOTOFF_HI16, /* type */ |
| 338 | 16, /* rightshift */ |
| 339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 16, /* bitsize */ |
| 341 | FALSE, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_dont, /* complain_on_overflow */ |
| 344 | bfd_elf_generic_reloc, /* special_function */ |
| 345 | "R_LM32_GOTOFF_HI16", /* name */ |
| 346 | FALSE, /* partial_inplace */ |
| 347 | 0xffff, /* src_mask */ |
| 348 | 0xffff, /* dst_mask */ |
| 349 | FALSE), /* pcrel_offset */ |
| 350 | |
| 351 | HOWTO (R_LM32_GOTOFF_LO16, /* type */ |
| 352 | 0, /* rightshift */ |
| 353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 354 | 16, /* bitsize */ |
| 355 | FALSE, /* pc_relative */ |
| 356 | 0, /* bitpos */ |
| 357 | complain_overflow_dont, /* complain_on_overflow */ |
| 358 | bfd_elf_generic_reloc, /* special_function */ |
| 359 | "R_LM32_GOTOFF_LO16", /* name */ |
| 360 | FALSE, /* partial_inplace */ |
| 361 | 0xffff, /* src_mask */ |
| 362 | 0xffff, /* dst_mask */ |
| 363 | FALSE), /* pcrel_offset */ |
| 364 | |
| 365 | HOWTO (R_LM32_COPY, /* type */ |
| 366 | 0, /* rightshift */ |
| 367 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 368 | 32, /* bitsize */ |
| 369 | FALSE, /* pc_relative */ |
| 370 | 0, /* bitpos */ |
| 371 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 372 | bfd_elf_generic_reloc, /* special_function */ |
| 373 | "R_LM32_COPY", /* name */ |
| 374 | FALSE, /* partial_inplace */ |
| 375 | 0xffffffff, /* src_mask */ |
| 376 | 0xffffffff, /* dst_mask */ |
| 377 | FALSE), /* pcrel_offset */ |
| 378 | |
| 379 | HOWTO (R_LM32_GLOB_DAT, /* type */ |
| 380 | 0, /* rightshift */ |
| 381 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 382 | 32, /* bitsize */ |
| 383 | FALSE, /* pc_relative */ |
| 384 | 0, /* bitpos */ |
| 385 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 386 | bfd_elf_generic_reloc, /* special_function */ |
| 387 | "R_LM32_GLOB_DAT", /* name */ |
| 388 | FALSE, /* partial_inplace */ |
| 389 | 0xffffffff, /* src_mask */ |
| 390 | 0xffffffff, /* dst_mask */ |
| 391 | FALSE), /* pcrel_offset */ |
| 392 | |
| 393 | HOWTO (R_LM32_JMP_SLOT, /* type */ |
| 394 | 0, /* rightshift */ |
| 395 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 396 | 32, /* bitsize */ |
| 397 | FALSE, /* pc_relative */ |
| 398 | 0, /* bitpos */ |
| 399 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 400 | bfd_elf_generic_reloc, /* special_function */ |
| 401 | "R_LM32_JMP_SLOT", /* name */ |
| 402 | FALSE, /* partial_inplace */ |
| 403 | 0xffffffff, /* src_mask */ |
| 404 | 0xffffffff, /* dst_mask */ |
| 405 | FALSE), /* pcrel_offset */ |
| 406 | |
| 407 | HOWTO (R_LM32_RELATIVE, /* type */ |
| 408 | 0, /* rightshift */ |
| 409 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 410 | 32, /* bitsize */ |
| 411 | FALSE, /* pc_relative */ |
| 412 | 0, /* bitpos */ |
| 413 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 414 | bfd_elf_generic_reloc, /* special_function */ |
| 415 | "R_LM32_RELATIVE", /* name */ |
| 416 | FALSE, /* partial_inplace */ |
| 417 | 0xffffffff, /* src_mask */ |
| 418 | 0xffffffff, /* dst_mask */ |
| 419 | FALSE), /* pcrel_offset */ |
| 420 | |
| 421 | }; |
| 422 | |
| 423 | /* Map BFD reloc types to lm32 ELF reloc types. */ |
| 424 | |
| 425 | struct lm32_reloc_map |
| 426 | { |
| 427 | bfd_reloc_code_real_type bfd_reloc_val; |
| 428 | unsigned char elf_reloc_val; |
| 429 | }; |
| 430 | |
| 431 | static const struct lm32_reloc_map lm32_reloc_map[] = |
| 432 | { |
| 433 | { BFD_RELOC_NONE, R_LM32_NONE }, |
| 434 | { BFD_RELOC_8, R_LM32_8 }, |
| 435 | { BFD_RELOC_16, R_LM32_16 }, |
| 436 | { BFD_RELOC_32, R_LM32_32 }, |
| 437 | { BFD_RELOC_HI16, R_LM32_HI16 }, |
| 438 | { BFD_RELOC_LO16, R_LM32_LO16 }, |
| 439 | { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, |
| 440 | { BFD_RELOC_LM32_CALL, R_LM32_CALL }, |
| 441 | { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, |
| 442 | { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, |
| 443 | { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, |
| 444 | { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, |
| 445 | { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, |
| 446 | { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, |
| 447 | { BFD_RELOC_LM32_COPY, R_LM32_COPY }, |
| 448 | { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, |
| 449 | { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, |
| 450 | { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, |
| 451 | }; |
| 452 | |
| 453 | static reloc_howto_type * |
| 454 | lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 455 | bfd_reloc_code_real_type code) |
| 456 | { |
| 457 | unsigned int i; |
| 458 | |
| 459 | for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) |
| 460 | if (lm32_reloc_map[i].bfd_reloc_val == code) |
| 461 | return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; |
| 462 | return NULL; |
| 463 | } |
| 464 | |
| 465 | static reloc_howto_type * |
| 466 | lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 467 | const char *r_name) |
| 468 | { |
| 469 | unsigned int i; |
| 470 | |
| 471 | for (i = 0; |
| 472 | i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); |
| 473 | i++) |
| 474 | if (lm32_elf_howto_table[i].name != NULL |
| 475 | && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) |
| 476 | return &lm32_elf_howto_table[i]; |
| 477 | |
| 478 | return NULL; |
| 479 | } |
| 480 | |
| 481 | |
| 482 | /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ |
| 483 | |
| 484 | static bfd_boolean |
| 485 | lm32_info_to_howto_rela (bfd *abfd, |
| 486 | arelent *cache_ptr, |
| 487 | Elf_Internal_Rela *dst) |
| 488 | { |
| 489 | unsigned int r_type; |
| 490 | |
| 491 | r_type = ELF32_R_TYPE (dst->r_info); |
| 492 | if (r_type >= (unsigned int) R_LM32_max) |
| 493 | { |
| 494 | /* xgettext:c-format */ |
| 495 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 496 | abfd, r_type); |
| 497 | bfd_set_error (bfd_error_bad_value); |
| 498 | return FALSE; |
| 499 | } |
| 500 | cache_ptr->howto = &lm32_elf_howto_table[r_type]; |
| 501 | return TRUE; |
| 502 | } |
| 503 | |
| 504 | /* Set the right machine number for an Lattice Mico32 ELF file. */ |
| 505 | |
| 506 | static bfd_boolean |
| 507 | lm32_elf_object_p (bfd *abfd) |
| 508 | { |
| 509 | return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); |
| 510 | } |
| 511 | |
| 512 | /* Set machine type flags just before file is written out. */ |
| 513 | |
| 514 | static bfd_boolean |
| 515 | lm32_elf_final_write_processing (bfd *abfd) |
| 516 | { |
| 517 | elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; |
| 518 | elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; |
| 519 | switch (bfd_get_mach (abfd)) |
| 520 | { |
| 521 | case bfd_mach_lm32: |
| 522 | elf_elfheader (abfd)->e_flags |= E_LM32_MACH; |
| 523 | break; |
| 524 | default: |
| 525 | abort (); |
| 526 | } |
| 527 | return _bfd_elf_final_write_processing (abfd); |
| 528 | } |
| 529 | |
| 530 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 531 | dangerous relocation. */ |
| 532 | |
| 533 | static bfd_boolean |
| 534 | lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| 535 | { |
| 536 | unsigned int count; |
| 537 | asymbol **sym; |
| 538 | unsigned int i; |
| 539 | |
| 540 | /* If we've already figured out what GP will be, just return it. */ |
| 541 | *pgp = _bfd_get_gp_value (output_bfd); |
| 542 | if (*pgp) |
| 543 | return TRUE; |
| 544 | |
| 545 | count = bfd_get_symcount (output_bfd); |
| 546 | sym = bfd_get_outsymbols (output_bfd); |
| 547 | |
| 548 | /* The linker script will have created a symbol named `_gp' with the |
| 549 | appropriate value. */ |
| 550 | if (sym == NULL) |
| 551 | i = count; |
| 552 | else |
| 553 | { |
| 554 | for (i = 0; i < count; i++, sym++) |
| 555 | { |
| 556 | const char *name; |
| 557 | |
| 558 | name = bfd_asymbol_name (*sym); |
| 559 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 560 | { |
| 561 | *pgp = bfd_asymbol_value (*sym); |
| 562 | _bfd_set_gp_value (output_bfd, *pgp); |
| 563 | break; |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | if (i >= count) |
| 569 | { |
| 570 | /* Only get the error once. */ |
| 571 | *pgp = 4; |
| 572 | _bfd_set_gp_value (output_bfd, *pgp); |
| 573 | return FALSE; |
| 574 | } |
| 575 | |
| 576 | return TRUE; |
| 577 | } |
| 578 | |
| 579 | /* We have to figure out the gp value, so that we can adjust the |
| 580 | symbol value correctly. We look up the symbol _gp in the output |
| 581 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 582 | target data. We don't need to adjust the symbol value for an |
| 583 | external symbol if we are producing relocatable output. */ |
| 584 | |
| 585 | static bfd_reloc_status_type |
| 586 | lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, |
| 587 | char **error_message, bfd_vma *pgp) |
| 588 | { |
| 589 | if (bfd_is_und_section (symbol->section) && !relocatable) |
| 590 | { |
| 591 | *pgp = 0; |
| 592 | return bfd_reloc_undefined; |
| 593 | } |
| 594 | |
| 595 | *pgp = _bfd_get_gp_value (output_bfd); |
| 596 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 597 | { |
| 598 | if (relocatable) |
| 599 | { |
| 600 | /* Make up a value. */ |
| 601 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 602 | _bfd_set_gp_value (output_bfd, *pgp); |
| 603 | } |
| 604 | else if (!lm32_elf_assign_gp (output_bfd, pgp)) |
| 605 | { |
| 606 | *error_message = |
| 607 | (char *) |
| 608 | _("global pointer relative relocation when _gp not defined"); |
| 609 | return bfd_reloc_dangerous; |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | return bfd_reloc_ok; |
| 614 | } |
| 615 | |
| 616 | static bfd_reloc_status_type |
| 617 | lm32_elf_do_gprel_relocate (bfd *abfd, |
| 618 | reloc_howto_type *howto, |
| 619 | asection *input_section ATTRIBUTE_UNUSED, |
| 620 | bfd_byte *data, |
| 621 | bfd_vma offset, |
| 622 | bfd_vma symbol_value, |
| 623 | bfd_vma addend) |
| 624 | { |
| 625 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 626 | data, offset, symbol_value, addend); |
| 627 | } |
| 628 | |
| 629 | static bfd_reloc_status_type |
| 630 | lm32_elf_gprel_reloc (bfd *abfd, |
| 631 | arelent *reloc_entry, |
| 632 | asymbol *symbol, |
| 633 | void *data, |
| 634 | asection *input_section, |
| 635 | bfd *output_bfd, |
| 636 | char **msg) |
| 637 | { |
| 638 | bfd_vma relocation; |
| 639 | bfd_vma gp; |
| 640 | bfd_reloc_status_type r; |
| 641 | |
| 642 | if (output_bfd != (bfd *) NULL |
| 643 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 644 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 645 | { |
| 646 | reloc_entry->address += input_section->output_offset; |
| 647 | return bfd_reloc_ok; |
| 648 | } |
| 649 | |
| 650 | if (output_bfd != NULL) |
| 651 | return bfd_reloc_ok; |
| 652 | |
| 653 | relocation = symbol->value |
| 654 | + symbol->section->output_section->vma + symbol->section->output_offset; |
| 655 | |
| 656 | if ((r = |
| 657 | lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok) |
| 658 | { |
| 659 | relocation = relocation + reloc_entry->addend - gp; |
| 660 | reloc_entry->addend = 0; |
| 661 | if ((signed) relocation < -32768 || (signed) relocation > 32767) |
| 662 | { |
| 663 | *msg = _("global pointer relative address out of range"); |
| 664 | r = bfd_reloc_outofrange; |
| 665 | } |
| 666 | else |
| 667 | { |
| 668 | r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, |
| 669 | input_section, |
| 670 | data, reloc_entry->address, |
| 671 | relocation, reloc_entry->addend); |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | return r; |
| 676 | } |
| 677 | |
| 678 | /* Find the segment number in which OSEC, and output section, is |
| 679 | located. */ |
| 680 | |
| 681 | static unsigned |
| 682 | _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
| 683 | { |
| 684 | struct elf_segment_map *m; |
| 685 | Elf_Internal_Phdr *p; |
| 686 | |
| 687 | /* Find the segment that contains the output_section. */ |
| 688 | for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; |
| 689 | m != NULL; |
| 690 | m = m->next, p++) |
| 691 | { |
| 692 | int i; |
| 693 | |
| 694 | for (i = m->count - 1; i >= 0; i--) |
| 695 | if (m->sections[i] == osec) |
| 696 | break; |
| 697 | |
| 698 | if (i >= 0) |
| 699 | break; |
| 700 | } |
| 701 | |
| 702 | return p - elf_tdata (output_bfd)->phdr; |
| 703 | } |
| 704 | |
| 705 | /* Determine if an output section is read-only. */ |
| 706 | |
| 707 | inline static bfd_boolean |
| 708 | _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
| 709 | { |
| 710 | unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); |
| 711 | |
| 712 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
| 713 | } |
| 714 | |
| 715 | /* Relocate a section */ |
| 716 | |
| 717 | static bfd_boolean |
| 718 | lm32_elf_relocate_section (bfd *output_bfd, |
| 719 | struct bfd_link_info *info, |
| 720 | bfd *input_bfd, |
| 721 | asection *input_section, |
| 722 | bfd_byte *contents, |
| 723 | Elf_Internal_Rela *relocs, |
| 724 | Elf_Internal_Sym *local_syms, |
| 725 | asection **local_sections) |
| 726 | { |
| 727 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 728 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 729 | Elf_Internal_Rela *rel, *relend; |
| 730 | struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); |
| 731 | bfd_vma *local_got_offsets; |
| 732 | asection *sgot; |
| 733 | |
| 734 | if (htab == NULL) |
| 735 | return FALSE; |
| 736 | |
| 737 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 738 | |
| 739 | sgot = htab->root.sgot; |
| 740 | |
| 741 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 742 | sym_hashes = elf_sym_hashes (input_bfd); |
| 743 | |
| 744 | rel = relocs; |
| 745 | relend = relocs + input_section->reloc_count; |
| 746 | for (; rel < relend; rel++) |
| 747 | { |
| 748 | reloc_howto_type *howto; |
| 749 | unsigned int r_type; |
| 750 | unsigned long r_symndx; |
| 751 | Elf_Internal_Sym *sym; |
| 752 | asection *sec; |
| 753 | struct elf_link_hash_entry *h; |
| 754 | bfd_vma relocation; |
| 755 | bfd_vma gp; |
| 756 | bfd_reloc_status_type r; |
| 757 | const char *name = NULL; |
| 758 | |
| 759 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 760 | r_type = ELF32_R_TYPE (rel->r_info); |
| 761 | |
| 762 | if (r_type == R_LM32_GNU_VTENTRY |
| 763 | || r_type == R_LM32_GNU_VTINHERIT ) |
| 764 | continue; |
| 765 | |
| 766 | h = NULL; |
| 767 | sym = NULL; |
| 768 | sec = NULL; |
| 769 | |
| 770 | howto = lm32_elf_howto_table + r_type; |
| 771 | |
| 772 | if (r_symndx < symtab_hdr->sh_info) |
| 773 | { |
| 774 | /* It's a local symbol. */ |
| 775 | sym = local_syms + r_symndx; |
| 776 | sec = local_sections[r_symndx]; |
| 777 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 778 | name = bfd_elf_string_from_elf_section |
| 779 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 780 | name = name == NULL ? bfd_section_name (sec) : name; |
| 781 | } |
| 782 | else |
| 783 | { |
| 784 | /* It's a global symbol. */ |
| 785 | bfd_boolean unresolved_reloc; |
| 786 | bfd_boolean warned, ignored; |
| 787 | |
| 788 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 789 | r_symndx, symtab_hdr, sym_hashes, |
| 790 | h, sec, relocation, |
| 791 | unresolved_reloc, warned, ignored); |
| 792 | name = h->root.root.string; |
| 793 | } |
| 794 | |
| 795 | if (sec != NULL && discarded_section (sec)) |
| 796 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 797 | rel, 1, relend, howto, 0, contents); |
| 798 | |
| 799 | if (bfd_link_relocatable (info)) |
| 800 | { |
| 801 | /* This is a relocatable link. We don't have to change |
| 802 | anything, unless the reloc is against a section symbol, |
| 803 | in which case we have to adjust according to where the |
| 804 | section symbol winds up in the output section. */ |
| 805 | if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 806 | continue; |
| 807 | |
| 808 | /* If partial_inplace, we need to store any additional addend |
| 809 | back in the section. */ |
| 810 | if (! howto->partial_inplace) |
| 811 | continue; |
| 812 | |
| 813 | /* Shouldn't reach here. */ |
| 814 | abort (); |
| 815 | r = bfd_reloc_ok; |
| 816 | } |
| 817 | else |
| 818 | { |
| 819 | switch (howto->type) |
| 820 | { |
| 821 | case R_LM32_GPREL16: |
| 822 | if (!lm32_elf_assign_gp (output_bfd, &gp)) |
| 823 | r = bfd_reloc_dangerous; |
| 824 | else |
| 825 | { |
| 826 | relocation = relocation + rel->r_addend - gp; |
| 827 | rel->r_addend = 0; |
| 828 | if ((signed)relocation < -32768 || (signed)relocation > 32767) |
| 829 | r = bfd_reloc_outofrange; |
| 830 | else |
| 831 | { |
| 832 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 833 | input_section, contents, |
| 834 | rel->r_offset, relocation, |
| 835 | rel->r_addend); |
| 836 | } |
| 837 | } |
| 838 | break; |
| 839 | case R_LM32_16_GOT: |
| 840 | /* Relocation is to the entry for this symbol in the global |
| 841 | offset table. */ |
| 842 | BFD_ASSERT (sgot != NULL); |
| 843 | if (h != NULL) |
| 844 | { |
| 845 | bfd_boolean dyn; |
| 846 | bfd_vma off; |
| 847 | |
| 848 | off = h->got.offset; |
| 849 | BFD_ASSERT (off != (bfd_vma) -1); |
| 850 | |
| 851 | dyn = htab->root.dynamic_sections_created; |
| 852 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 853 | bfd_link_pic (info), |
| 854 | h) |
| 855 | || (bfd_link_pic (info) |
| 856 | && (info->symbolic |
| 857 | || h->dynindx == -1 |
| 858 | || h->forced_local) |
| 859 | && h->def_regular)) |
| 860 | { |
| 861 | /* This is actually a static link, or it is a |
| 862 | -Bsymbolic link and the symbol is defined |
| 863 | locally, or the symbol was forced to be local |
| 864 | because of a version file. We must initialize |
| 865 | this entry in the global offset table. Since the |
| 866 | offset must always be a multiple of 4, we use the |
| 867 | least significant bit to record whether we have |
| 868 | initialized it already. |
| 869 | |
| 870 | When doing a dynamic link, we create a .rela.got |
| 871 | relocation entry to initialize the value. This |
| 872 | is done in the finish_dynamic_symbol routine. */ |
| 873 | if ((off & 1) != 0) |
| 874 | off &= ~1; |
| 875 | else |
| 876 | { |
| 877 | /* Write entry in GOT */ |
| 878 | bfd_put_32 (output_bfd, relocation, |
| 879 | sgot->contents + off); |
| 880 | /* Create entry in .rofixup pointing to GOT entry. */ |
| 881 | if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) |
| 882 | { |
| 883 | _lm32fdpic_add_rofixup (output_bfd, |
| 884 | lm32fdpic_fixup32_section |
| 885 | (info), |
| 886 | sgot->output_section->vma |
| 887 | + sgot->output_offset |
| 888 | + off); |
| 889 | } |
| 890 | /* Mark GOT entry as having been written. */ |
| 891 | h->got.offset |= 1; |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | relocation = sgot->output_offset + off; |
| 896 | } |
| 897 | else |
| 898 | { |
| 899 | bfd_vma off; |
| 900 | bfd_byte *loc; |
| 901 | |
| 902 | BFD_ASSERT (local_got_offsets != NULL |
| 903 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 904 | |
| 905 | /* Get offset into GOT table. */ |
| 906 | off = local_got_offsets[r_symndx]; |
| 907 | |
| 908 | /* The offset must always be a multiple of 4. We use |
| 909 | the least significant bit to record whether we have |
| 910 | already processed this entry. */ |
| 911 | if ((off & 1) != 0) |
| 912 | off &= ~1; |
| 913 | else |
| 914 | { |
| 915 | /* Write entry in GOT. */ |
| 916 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 917 | /* Create entry in .rofixup pointing to GOT entry. */ |
| 918 | if (IS_FDPIC (output_bfd)) |
| 919 | { |
| 920 | _lm32fdpic_add_rofixup (output_bfd, |
| 921 | lm32fdpic_fixup32_section |
| 922 | (info), |
| 923 | sgot->output_section->vma |
| 924 | + sgot->output_offset |
| 925 | + off); |
| 926 | } |
| 927 | |
| 928 | if (bfd_link_pic (info)) |
| 929 | { |
| 930 | asection *srelgot; |
| 931 | Elf_Internal_Rela outrel; |
| 932 | |
| 933 | /* We need to generate a R_LM32_RELATIVE reloc |
| 934 | for the dynamic linker. */ |
| 935 | srelgot = htab->root.srelgot; |
| 936 | BFD_ASSERT (srelgot != NULL); |
| 937 | |
| 938 | outrel.r_offset = (sgot->output_section->vma |
| 939 | + sgot->output_offset |
| 940 | + off); |
| 941 | outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| 942 | outrel.r_addend = relocation; |
| 943 | loc = srelgot->contents; |
| 944 | loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); |
| 945 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); |
| 946 | ++srelgot->reloc_count; |
| 947 | } |
| 948 | |
| 949 | local_got_offsets[r_symndx] |= 1; |
| 950 | } |
| 951 | |
| 952 | |
| 953 | relocation = sgot->output_offset + off; |
| 954 | } |
| 955 | |
| 956 | /* Addend should be zero. */ |
| 957 | if (rel->r_addend != 0) |
| 958 | _bfd_error_handler |
| 959 | (_("internal error: addend should be zero for %s"), |
| 960 | "R_LM32_16_GOT"); |
| 961 | |
| 962 | r = _bfd_final_link_relocate (howto, |
| 963 | input_bfd, |
| 964 | input_section, |
| 965 | contents, |
| 966 | rel->r_offset, |
| 967 | relocation, |
| 968 | rel->r_addend); |
| 969 | break; |
| 970 | |
| 971 | case R_LM32_GOTOFF_LO16: |
| 972 | case R_LM32_GOTOFF_HI16: |
| 973 | /* Relocation is offset from GOT. */ |
| 974 | BFD_ASSERT (sgot != NULL); |
| 975 | relocation -= sgot->output_section->vma; |
| 976 | /* Account for sign-extension. */ |
| 977 | if ((r_type == R_LM32_GOTOFF_HI16) |
| 978 | && ((relocation + rel->r_addend) & 0x8000)) |
| 979 | rel->r_addend += 0x10000; |
| 980 | r = _bfd_final_link_relocate (howto, |
| 981 | input_bfd, |
| 982 | input_section, |
| 983 | contents, |
| 984 | rel->r_offset, |
| 985 | relocation, |
| 986 | rel->r_addend); |
| 987 | break; |
| 988 | |
| 989 | case R_LM32_32: |
| 990 | if (IS_FDPIC (output_bfd)) |
| 991 | { |
| 992 | if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) |
| 993 | { |
| 994 | /* Only create .rofixup entries for relocs in loadable sections. */ |
| 995 | if ((bfd_section_flags (input_section->output_section) |
| 996 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 997 | |
| 998 | { |
| 999 | /* Check address to be modified is writable. */ |
| 1000 | if (_lm32fdpic_osec_readonly_p (output_bfd, |
| 1001 | input_section |
| 1002 | ->output_section)) |
| 1003 | { |
| 1004 | info->callbacks->warning |
| 1005 | (info, |
| 1006 | _("cannot emit dynamic relocations in read-only section"), |
| 1007 | name, input_bfd, input_section, rel->r_offset); |
| 1008 | return FALSE; |
| 1009 | } |
| 1010 | /* Create entry in .rofixup section. */ |
| 1011 | _lm32fdpic_add_rofixup (output_bfd, |
| 1012 | lm32fdpic_fixup32_section (info), |
| 1013 | input_section->output_section->vma |
| 1014 | + input_section->output_offset |
| 1015 | + rel->r_offset); |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | /* Fall through. */ |
| 1020 | |
| 1021 | default: |
| 1022 | r = _bfd_final_link_relocate (howto, |
| 1023 | input_bfd, |
| 1024 | input_section, |
| 1025 | contents, |
| 1026 | rel->r_offset, |
| 1027 | relocation, |
| 1028 | rel->r_addend); |
| 1029 | break; |
| 1030 | } |
| 1031 | } |
| 1032 | |
| 1033 | if (r != bfd_reloc_ok) |
| 1034 | { |
| 1035 | const char *msg = NULL; |
| 1036 | arelent bfd_reloc; |
| 1037 | |
| 1038 | if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel)) |
| 1039 | continue; |
| 1040 | howto = bfd_reloc.howto; |
| 1041 | |
| 1042 | if (h != NULL) |
| 1043 | name = h->root.root.string; |
| 1044 | else |
| 1045 | { |
| 1046 | name = (bfd_elf_string_from_elf_section |
| 1047 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1048 | if (name == NULL || *name == '\0') |
| 1049 | name = bfd_section_name (sec); |
| 1050 | } |
| 1051 | |
| 1052 | switch (r) |
| 1053 | { |
| 1054 | case bfd_reloc_overflow: |
| 1055 | if ((h != NULL) |
| 1056 | && (h->root.type == bfd_link_hash_undefweak)) |
| 1057 | break; |
| 1058 | (*info->callbacks->reloc_overflow) |
| 1059 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1060 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 1061 | break; |
| 1062 | |
| 1063 | case bfd_reloc_undefined: |
| 1064 | (*info->callbacks->undefined_symbol) |
| 1065 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 1066 | break; |
| 1067 | |
| 1068 | case bfd_reloc_outofrange: |
| 1069 | msg = _("internal error: out of range error"); |
| 1070 | goto common_error; |
| 1071 | |
| 1072 | case bfd_reloc_notsupported: |
| 1073 | msg = _("internal error: unsupported relocation error"); |
| 1074 | goto common_error; |
| 1075 | |
| 1076 | case bfd_reloc_dangerous: |
| 1077 | msg = _("internal error: dangerous error"); |
| 1078 | goto common_error; |
| 1079 | |
| 1080 | default: |
| 1081 | msg = _("internal error: unknown error"); |
| 1082 | /* fall through */ |
| 1083 | |
| 1084 | common_error: |
| 1085 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 1086 | input_section, rel->r_offset); |
| 1087 | break; |
| 1088 | } |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | return TRUE; |
| 1093 | } |
| 1094 | |
| 1095 | static asection * |
| 1096 | lm32_elf_gc_mark_hook (asection *sec, |
| 1097 | struct bfd_link_info *info, |
| 1098 | Elf_Internal_Rela *rel, |
| 1099 | struct elf_link_hash_entry *h, |
| 1100 | Elf_Internal_Sym *sym) |
| 1101 | { |
| 1102 | if (h != NULL) |
| 1103 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1104 | { |
| 1105 | case R_LM32_GNU_VTINHERIT: |
| 1106 | case R_LM32_GNU_VTENTRY: |
| 1107 | return NULL; |
| 1108 | } |
| 1109 | |
| 1110 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 1111 | } |
| 1112 | |
| 1113 | /* Look through the relocs for a section during the first phase. */ |
| 1114 | |
| 1115 | static bfd_boolean |
| 1116 | lm32_elf_check_relocs (bfd *abfd, |
| 1117 | struct bfd_link_info *info, |
| 1118 | asection *sec, |
| 1119 | const Elf_Internal_Rela *relocs) |
| 1120 | { |
| 1121 | Elf_Internal_Shdr *symtab_hdr; |
| 1122 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 1123 | const Elf_Internal_Rela *rel; |
| 1124 | const Elf_Internal_Rela *rel_end; |
| 1125 | struct elf_lm32_link_hash_table *htab; |
| 1126 | bfd *dynobj; |
| 1127 | |
| 1128 | if (bfd_link_relocatable (info)) |
| 1129 | return TRUE; |
| 1130 | |
| 1131 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 1132 | In particular, any relocs in such sections should not affect GOT |
| 1133 | and PLT reference counting (ie. we don't allow them to create GOT |
| 1134 | or PLT entries), there's no possibility or desire to optimize TLS |
| 1135 | relocs, and there's not much point in propagating relocs to shared |
| 1136 | libs that the dynamic linker won't relocate. */ |
| 1137 | if ((sec->flags & SEC_ALLOC) == 0) |
| 1138 | return TRUE; |
| 1139 | |
| 1140 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1141 | sym_hashes = elf_sym_hashes (abfd); |
| 1142 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| 1143 | if (!elf_bad_symtab (abfd)) |
| 1144 | sym_hashes_end -= symtab_hdr->sh_info; |
| 1145 | |
| 1146 | htab = lm32_elf_hash_table (info); |
| 1147 | if (htab == NULL) |
| 1148 | return FALSE; |
| 1149 | |
| 1150 | dynobj = htab->root.dynobj; |
| 1151 | |
| 1152 | rel_end = relocs + sec->reloc_count; |
| 1153 | for (rel = relocs; rel < rel_end; rel++) |
| 1154 | { |
| 1155 | int r_type; |
| 1156 | struct elf_link_hash_entry *h; |
| 1157 | unsigned long r_symndx; |
| 1158 | |
| 1159 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1160 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1161 | if (r_symndx < symtab_hdr->sh_info) |
| 1162 | h = NULL; |
| 1163 | else |
| 1164 | { |
| 1165 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1166 | while (h->root.type == bfd_link_hash_indirect |
| 1167 | || h->root.type == bfd_link_hash_warning) |
| 1168 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1169 | } |
| 1170 | |
| 1171 | /* Some relocs require a global offset table. */ |
| 1172 | if (htab->root.sgot == NULL) |
| 1173 | { |
| 1174 | switch (r_type) |
| 1175 | { |
| 1176 | case R_LM32_16_GOT: |
| 1177 | case R_LM32_GOTOFF_HI16: |
| 1178 | case R_LM32_GOTOFF_LO16: |
| 1179 | if (dynobj == NULL) |
| 1180 | htab->root.dynobj = dynobj = abfd; |
| 1181 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1182 | return FALSE; |
| 1183 | break; |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | /* Some relocs require a rofixup table. */ |
| 1188 | if (IS_FDPIC (abfd)) |
| 1189 | { |
| 1190 | switch (r_type) |
| 1191 | { |
| 1192 | case R_LM32_32: |
| 1193 | /* FDPIC requires a GOT if there is a .rofixup section |
| 1194 | (Normal ELF doesn't). */ |
| 1195 | if (dynobj == NULL) |
| 1196 | htab->root.dynobj = dynobj = abfd; |
| 1197 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1198 | return FALSE; |
| 1199 | /* Create .rofixup section */ |
| 1200 | if (htab->sfixup32 == NULL) |
| 1201 | { |
| 1202 | if (! create_rofixup_section (dynobj, info)) |
| 1203 | return FALSE; |
| 1204 | } |
| 1205 | break; |
| 1206 | case R_LM32_16_GOT: |
| 1207 | case R_LM32_GOTOFF_HI16: |
| 1208 | case R_LM32_GOTOFF_LO16: |
| 1209 | /* Create .rofixup section. */ |
| 1210 | if (htab->sfixup32 == NULL) |
| 1211 | { |
| 1212 | if (dynobj == NULL) |
| 1213 | htab->root.dynobj = dynobj = abfd; |
| 1214 | if (! create_rofixup_section (dynobj, info)) |
| 1215 | return FALSE; |
| 1216 | } |
| 1217 | break; |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | switch (r_type) |
| 1222 | { |
| 1223 | case R_LM32_16_GOT: |
| 1224 | if (h != NULL) |
| 1225 | h->got.refcount += 1; |
| 1226 | else |
| 1227 | { |
| 1228 | bfd_signed_vma *local_got_refcounts; |
| 1229 | |
| 1230 | /* This is a global offset table entry for a local symbol. */ |
| 1231 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1232 | if (local_got_refcounts == NULL) |
| 1233 | { |
| 1234 | bfd_size_type size; |
| 1235 | |
| 1236 | size = symtab_hdr->sh_info; |
| 1237 | size *= sizeof (bfd_signed_vma); |
| 1238 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 1239 | if (local_got_refcounts == NULL) |
| 1240 | return FALSE; |
| 1241 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1242 | } |
| 1243 | local_got_refcounts[r_symndx] += 1; |
| 1244 | } |
| 1245 | break; |
| 1246 | |
| 1247 | /* This relocation describes the C++ object vtable hierarchy. |
| 1248 | Reconstruct it for later use during GC. */ |
| 1249 | case R_LM32_GNU_VTINHERIT: |
| 1250 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1251 | return FALSE; |
| 1252 | break; |
| 1253 | |
| 1254 | /* This relocation describes which C++ vtable entries are actually |
| 1255 | used. Record for later use during GC. */ |
| 1256 | case R_LM32_GNU_VTENTRY: |
| 1257 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1258 | return FALSE; |
| 1259 | break; |
| 1260 | |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | return TRUE; |
| 1265 | } |
| 1266 | |
| 1267 | /* Finish up the dynamic sections. */ |
| 1268 | |
| 1269 | static bfd_boolean |
| 1270 | lm32_elf_finish_dynamic_sections (bfd *output_bfd, |
| 1271 | struct bfd_link_info *info) |
| 1272 | { |
| 1273 | struct elf_lm32_link_hash_table *htab; |
| 1274 | bfd *dynobj; |
| 1275 | asection *sdyn; |
| 1276 | asection *sgot; |
| 1277 | |
| 1278 | htab = lm32_elf_hash_table (info); |
| 1279 | if (htab == NULL) |
| 1280 | return FALSE; |
| 1281 | |
| 1282 | dynobj = htab->root.dynobj; |
| 1283 | |
| 1284 | sgot = htab->root.sgotplt; |
| 1285 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 1286 | |
| 1287 | if (htab->root.dynamic_sections_created) |
| 1288 | { |
| 1289 | asection *splt; |
| 1290 | Elf32_External_Dyn *dyncon, *dynconend; |
| 1291 | |
| 1292 | BFD_ASSERT (sgot != NULL && sdyn != NULL); |
| 1293 | |
| 1294 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 1295 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 1296 | |
| 1297 | for (; dyncon < dynconend; dyncon++) |
| 1298 | { |
| 1299 | Elf_Internal_Dyn dyn; |
| 1300 | asection *s; |
| 1301 | |
| 1302 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 1303 | |
| 1304 | switch (dyn.d_tag) |
| 1305 | { |
| 1306 | default: |
| 1307 | break; |
| 1308 | |
| 1309 | case DT_PLTGOT: |
| 1310 | s = htab->root.sgotplt; |
| 1311 | goto get_vma; |
| 1312 | case DT_JMPREL: |
| 1313 | s = htab->root.srelplt; |
| 1314 | get_vma: |
| 1315 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 1316 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1317 | break; |
| 1318 | |
| 1319 | case DT_PLTRELSZ: |
| 1320 | s = htab->root.srelplt; |
| 1321 | dyn.d_un.d_val = s->size; |
| 1322 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1323 | break; |
| 1324 | } |
| 1325 | } |
| 1326 | |
| 1327 | /* Fill in the first entry in the procedure linkage table. */ |
| 1328 | splt = htab->root.splt; |
| 1329 | if (splt && splt->size > 0) |
| 1330 | { |
| 1331 | if (bfd_link_pic (info)) |
| 1332 | { |
| 1333 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); |
| 1334 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); |
| 1335 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); |
| 1336 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); |
| 1337 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); |
| 1338 | } |
| 1339 | else |
| 1340 | { |
| 1341 | unsigned long addr; |
| 1342 | /* addr = .got + 4 */ |
| 1343 | addr = sgot->output_section->vma + sgot->output_offset + 4; |
| 1344 | bfd_put_32 (output_bfd, |
| 1345 | PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), |
| 1346 | splt->contents); |
| 1347 | bfd_put_32 (output_bfd, |
| 1348 | PLT0_ENTRY_WORD1 | (addr & 0xffff), |
| 1349 | splt->contents + 4); |
| 1350 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); |
| 1351 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); |
| 1352 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); |
| 1353 | } |
| 1354 | |
| 1355 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 1356 | PLT_ENTRY_SIZE; |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | /* Fill in the first three entries in the global offset table. */ |
| 1361 | if (sgot && sgot->size > 0) |
| 1362 | { |
| 1363 | if (sdyn == NULL) |
| 1364 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 1365 | else |
| 1366 | bfd_put_32 (output_bfd, |
| 1367 | sdyn->output_section->vma + sdyn->output_offset, |
| 1368 | sgot->contents); |
| 1369 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 1370 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 1371 | |
| 1372 | /* FIXME: This can be null if create_dynamic_sections wasn't called. */ |
| 1373 | if (elf_section_data (sgot->output_section) != NULL) |
| 1374 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 1375 | } |
| 1376 | |
| 1377 | if (lm32fdpic_fixup32_section (info)) |
| 1378 | { |
| 1379 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
| 1380 | bfd_vma got_value = hgot->root.u.def.value |
| 1381 | + hgot->root.u.def.section->output_section->vma |
| 1382 | + hgot->root.u.def.section->output_offset; |
| 1383 | struct bfd_link_hash_entry *hend; |
| 1384 | |
| 1385 | /* Last entry is pointer to GOT. */ |
| 1386 | _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); |
| 1387 | |
| 1388 | /* Check we wrote enough entries. */ |
| 1389 | if (lm32fdpic_fixup32_section (info)->size |
| 1390 | != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) |
| 1391 | { |
| 1392 | _bfd_error_handler |
| 1393 | ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64 |
| 1394 | " != relocs %d", |
| 1395 | (int64_t) (lm32fdpic_fixup32_section (info)->size / 4), |
| 1396 | lm32fdpic_fixup32_section (info)->reloc_count); |
| 1397 | return FALSE; |
| 1398 | } |
| 1399 | |
| 1400 | hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", |
| 1401 | FALSE, FALSE, TRUE); |
| 1402 | if (hend |
| 1403 | && (hend->type == bfd_link_hash_defined |
| 1404 | || hend->type == bfd_link_hash_defweak) |
| 1405 | && hend->u.def.section->output_section != NULL) |
| 1406 | { |
| 1407 | bfd_vma value = |
| 1408 | lm32fdpic_fixup32_section (info)->output_section->vma |
| 1409 | + lm32fdpic_fixup32_section (info)->output_offset |
| 1410 | + lm32fdpic_fixup32_section (info)->size |
| 1411 | - hend->u.def.section->output_section->vma |
| 1412 | - hend->u.def.section->output_offset; |
| 1413 | BFD_ASSERT (hend->u.def.value == value); |
| 1414 | if (hend->u.def.value != value) |
| 1415 | { |
| 1416 | _bfd_error_handler |
| 1417 | ("LINKER BUG: .rofixup section hend->u.def.value != value: %" |
| 1418 | PRId64 " != %" PRId64, |
| 1419 | (int64_t) hend->u.def.value, (int64_t) value); |
| 1420 | return FALSE; |
| 1421 | } |
| 1422 | } |
| 1423 | } |
| 1424 | |
| 1425 | return TRUE; |
| 1426 | } |
| 1427 | |
| 1428 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1429 | dynamic sections here. */ |
| 1430 | |
| 1431 | static bfd_boolean |
| 1432 | lm32_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 1433 | struct bfd_link_info *info, |
| 1434 | struct elf_link_hash_entry *h, |
| 1435 | Elf_Internal_Sym *sym) |
| 1436 | { |
| 1437 | struct elf_lm32_link_hash_table *htab; |
| 1438 | bfd_byte *loc; |
| 1439 | |
| 1440 | htab = lm32_elf_hash_table (info); |
| 1441 | if (htab == NULL) |
| 1442 | return FALSE; |
| 1443 | |
| 1444 | if (h->plt.offset != (bfd_vma) -1) |
| 1445 | { |
| 1446 | asection *splt; |
| 1447 | asection *sgot; |
| 1448 | asection *srela; |
| 1449 | |
| 1450 | bfd_vma plt_index; |
| 1451 | bfd_vma got_offset; |
| 1452 | Elf_Internal_Rela rela; |
| 1453 | |
| 1454 | /* This symbol has an entry in the procedure linkage table. Set |
| 1455 | it up. */ |
| 1456 | BFD_ASSERT (h->dynindx != -1); |
| 1457 | |
| 1458 | splt = htab->root.splt; |
| 1459 | sgot = htab->root.sgotplt; |
| 1460 | srela = htab->root.srelplt; |
| 1461 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| 1462 | |
| 1463 | /* Get the index in the procedure linkage table which |
| 1464 | corresponds to this symbol. This is the index of this symbol |
| 1465 | in all the symbols for which we are making plt entries. The |
| 1466 | first entry in the procedure linkage table is reserved. */ |
| 1467 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1468 | |
| 1469 | /* Get the offset into the .got table of the entry that |
| 1470 | corresponds to this function. Each .got entry is 4 bytes. |
| 1471 | The first three are reserved. */ |
| 1472 | got_offset = (plt_index + 3) * 4; |
| 1473 | |
| 1474 | /* Fill in the entry in the procedure linkage table. */ |
| 1475 | if (! bfd_link_pic (info)) |
| 1476 | { |
| 1477 | /* TODO */ |
| 1478 | } |
| 1479 | else |
| 1480 | { |
| 1481 | /* TODO */ |
| 1482 | } |
| 1483 | |
| 1484 | /* Fill in the entry in the global offset table. */ |
| 1485 | bfd_put_32 (output_bfd, |
| 1486 | (splt->output_section->vma |
| 1487 | + splt->output_offset |
| 1488 | + h->plt.offset |
| 1489 | + 12), /* same offset */ |
| 1490 | sgot->contents + got_offset); |
| 1491 | |
| 1492 | /* Fill in the entry in the .rela.plt section. */ |
| 1493 | rela.r_offset = (sgot->output_section->vma |
| 1494 | + sgot->output_offset |
| 1495 | + got_offset); |
| 1496 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); |
| 1497 | rela.r_addend = 0; |
| 1498 | loc = srela->contents; |
| 1499 | loc += plt_index * sizeof (Elf32_External_Rela); |
| 1500 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1501 | |
| 1502 | if (!h->def_regular) |
| 1503 | { |
| 1504 | /* Mark the symbol as undefined, rather than as defined in |
| 1505 | the .plt section. Leave the value alone. */ |
| 1506 | sym->st_shndx = SHN_UNDEF; |
| 1507 | } |
| 1508 | |
| 1509 | } |
| 1510 | |
| 1511 | if (h->got.offset != (bfd_vma) -1) |
| 1512 | { |
| 1513 | asection *sgot; |
| 1514 | asection *srela; |
| 1515 | Elf_Internal_Rela rela; |
| 1516 | |
| 1517 | /* This symbol has an entry in the global offset table. Set it |
| 1518 | up. */ |
| 1519 | sgot = htab->root.sgot; |
| 1520 | srela = htab->root.srelgot; |
| 1521 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1522 | |
| 1523 | rela.r_offset = (sgot->output_section->vma |
| 1524 | + sgot->output_offset |
| 1525 | + (h->got.offset &~ 1)); |
| 1526 | |
| 1527 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 1528 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 1529 | the symbol was forced to be local because of a version file. |
| 1530 | The entry in the global offset table will already have been |
| 1531 | initialized in the relocate_section function. */ |
| 1532 | if (bfd_link_pic (info) |
| 1533 | && (info->symbolic |
| 1534 | || h->dynindx == -1 |
| 1535 | || h->forced_local) |
| 1536 | && h->def_regular) |
| 1537 | { |
| 1538 | rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| 1539 | rela.r_addend = (h->root.u.def.value |
| 1540 | + h->root.u.def.section->output_section->vma |
| 1541 | + h->root.u.def.section->output_offset); |
| 1542 | } |
| 1543 | else |
| 1544 | { |
| 1545 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 1546 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 1547 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); |
| 1548 | rela.r_addend = 0; |
| 1549 | } |
| 1550 | |
| 1551 | loc = srela->contents; |
| 1552 | loc += srela->reloc_count * sizeof (Elf32_External_Rela); |
| 1553 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1554 | ++srela->reloc_count; |
| 1555 | } |
| 1556 | |
| 1557 | if (h->needs_copy) |
| 1558 | { |
| 1559 | asection *s; |
| 1560 | Elf_Internal_Rela rela; |
| 1561 | |
| 1562 | /* This symbols needs a copy reloc. Set it up. */ |
| 1563 | BFD_ASSERT (h->dynindx != -1 |
| 1564 | && (h->root.type == bfd_link_hash_defined |
| 1565 | || h->root.type == bfd_link_hash_defweak)); |
| 1566 | |
| 1567 | s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); |
| 1568 | BFD_ASSERT (s != NULL); |
| 1569 | |
| 1570 | rela.r_offset = (h->root.u.def.value |
| 1571 | + h->root.u.def.section->output_section->vma |
| 1572 | + h->root.u.def.section->output_offset); |
| 1573 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); |
| 1574 | rela.r_addend = 0; |
| 1575 | loc = s->contents; |
| 1576 | loc += s->reloc_count * sizeof (Elf32_External_Rela); |
| 1577 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1578 | ++s->reloc_count; |
| 1579 | } |
| 1580 | |
| 1581 | /* Mark some specially defined symbols as absolute. */ |
| 1582 | if (h == htab->root.hdynamic || h == htab->root.hgot) |
| 1583 | sym->st_shndx = SHN_ABS; |
| 1584 | |
| 1585 | return TRUE; |
| 1586 | } |
| 1587 | |
| 1588 | static enum elf_reloc_type_class |
| 1589 | lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1590 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 1591 | const Elf_Internal_Rela *rela) |
| 1592 | { |
| 1593 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 1594 | { |
| 1595 | case R_LM32_RELATIVE: return reloc_class_relative; |
| 1596 | case R_LM32_JMP_SLOT: return reloc_class_plt; |
| 1597 | case R_LM32_COPY: return reloc_class_copy; |
| 1598 | default: return reloc_class_normal; |
| 1599 | } |
| 1600 | } |
| 1601 | |
| 1602 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1603 | regular object. The current definition is in some section of the |
| 1604 | dynamic object, but we're not including those sections. We have to |
| 1605 | change the definition to something the rest of the link can |
| 1606 | understand. */ |
| 1607 | |
| 1608 | static bfd_boolean |
| 1609 | lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1610 | struct elf_link_hash_entry *h) |
| 1611 | { |
| 1612 | struct elf_lm32_link_hash_table *htab; |
| 1613 | bfd *dynobj; |
| 1614 | asection *s; |
| 1615 | |
| 1616 | dynobj = elf_hash_table (info)->dynobj; |
| 1617 | |
| 1618 | /* Make sure we know what is going on here. */ |
| 1619 | BFD_ASSERT (dynobj != NULL |
| 1620 | && (h->needs_plt |
| 1621 | || h->is_weakalias |
| 1622 | || (h->def_dynamic |
| 1623 | && h->ref_regular |
| 1624 | && !h->def_regular))); |
| 1625 | |
| 1626 | /* If this is a function, put it in the procedure linkage table. We |
| 1627 | will fill in the contents of the procedure linkage table later, |
| 1628 | when we know the address of the .got section. */ |
| 1629 | if (h->type == STT_FUNC |
| 1630 | || h->needs_plt) |
| 1631 | { |
| 1632 | if (! bfd_link_pic (info) |
| 1633 | && !h->def_dynamic |
| 1634 | && !h->ref_dynamic |
| 1635 | && h->root.type != bfd_link_hash_undefweak |
| 1636 | && h->root.type != bfd_link_hash_undefined) |
| 1637 | { |
| 1638 | /* This case can occur if we saw a PLT reloc in an input |
| 1639 | file, but the symbol was never referred to by a dynamic |
| 1640 | object. In such a case, we don't actually need to build |
| 1641 | a procedure linkage table, and we can just do a PCREL |
| 1642 | reloc instead. */ |
| 1643 | h->plt.offset = (bfd_vma) -1; |
| 1644 | h->needs_plt = 0; |
| 1645 | } |
| 1646 | |
| 1647 | return TRUE; |
| 1648 | } |
| 1649 | else |
| 1650 | h->plt.offset = (bfd_vma) -1; |
| 1651 | |
| 1652 | /* If this is a weak symbol, and there is a real definition, the |
| 1653 | processor independent code will have arranged for us to see the |
| 1654 | real definition first, and we can just use the same value. */ |
| 1655 | if (h->is_weakalias) |
| 1656 | { |
| 1657 | struct elf_link_hash_entry *def = weakdef (h); |
| 1658 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 1659 | h->root.u.def.section = def->root.u.def.section; |
| 1660 | h->root.u.def.value = def->root.u.def.value; |
| 1661 | return TRUE; |
| 1662 | } |
| 1663 | |
| 1664 | /* This is a reference to a symbol defined by a dynamic object which |
| 1665 | is not a function. */ |
| 1666 | |
| 1667 | /* If we are creating a shared library, we must presume that the |
| 1668 | only references to the symbol are via the global offset table. |
| 1669 | For such cases we need not do anything here; the relocations will |
| 1670 | be handled correctly by relocate_section. */ |
| 1671 | if (bfd_link_pic (info)) |
| 1672 | return TRUE; |
| 1673 | |
| 1674 | /* If there are no references to this symbol that do not use the |
| 1675 | GOT, we don't need to generate a copy reloc. */ |
| 1676 | if (!h->non_got_ref) |
| 1677 | return TRUE; |
| 1678 | |
| 1679 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1680 | if (0 && info->nocopyreloc) |
| 1681 | { |
| 1682 | h->non_got_ref = 0; |
| 1683 | return TRUE; |
| 1684 | } |
| 1685 | |
| 1686 | /* If we don't find any dynamic relocs in read-only sections, then |
| 1687 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 1688 | if (0 && !_bfd_elf_readonly_dynrelocs (h)) |
| 1689 | { |
| 1690 | h->non_got_ref = 0; |
| 1691 | return TRUE; |
| 1692 | } |
| 1693 | |
| 1694 | /* We must allocate the symbol in our .dynbss section, which will |
| 1695 | become part of the .bss section of the executable. There will be |
| 1696 | an entry for this symbol in the .dynsym section. The dynamic |
| 1697 | object will contain position independent code, so all references |
| 1698 | from the dynamic object to this symbol will go through the global |
| 1699 | offset table. The dynamic linker will use the .dynsym entry to |
| 1700 | determine the address it must put in the global offset table, so |
| 1701 | both the dynamic object and the regular object will refer to the |
| 1702 | same memory location for the variable. */ |
| 1703 | |
| 1704 | htab = lm32_elf_hash_table (info); |
| 1705 | if (htab == NULL) |
| 1706 | return FALSE; |
| 1707 | |
| 1708 | s = htab->sdynbss; |
| 1709 | BFD_ASSERT (s != NULL); |
| 1710 | |
| 1711 | /* We must generate a R_LM32_COPY reloc to tell the dynamic linker |
| 1712 | to copy the initial value out of the dynamic object and into the |
| 1713 | runtime process image. We need to remember the offset into the |
| 1714 | .rela.bss section we are going to use. */ |
| 1715 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 1716 | { |
| 1717 | asection *srel; |
| 1718 | |
| 1719 | srel = htab->srelbss; |
| 1720 | BFD_ASSERT (srel != NULL); |
| 1721 | srel->size += sizeof (Elf32_External_Rela); |
| 1722 | h->needs_copy = 1; |
| 1723 | } |
| 1724 | |
| 1725 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 1726 | } |
| 1727 | |
| 1728 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1729 | dynamic relocs. */ |
| 1730 | |
| 1731 | static bfd_boolean |
| 1732 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 1733 | { |
| 1734 | struct bfd_link_info *info; |
| 1735 | struct elf_lm32_link_hash_table *htab; |
| 1736 | struct elf_dyn_relocs *p; |
| 1737 | |
| 1738 | if (h->root.type == bfd_link_hash_indirect) |
| 1739 | return TRUE; |
| 1740 | |
| 1741 | info = (struct bfd_link_info *) inf; |
| 1742 | htab = lm32_elf_hash_table (info); |
| 1743 | if (htab == NULL) |
| 1744 | return FALSE; |
| 1745 | |
| 1746 | if (htab->root.dynamic_sections_created |
| 1747 | && h->plt.refcount > 0) |
| 1748 | { |
| 1749 | /* Make sure this symbol is output as a dynamic symbol. |
| 1750 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1751 | if (h->dynindx == -1 |
| 1752 | && !h->forced_local) |
| 1753 | { |
| 1754 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1755 | return FALSE; |
| 1756 | } |
| 1757 | |
| 1758 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
| 1759 | { |
| 1760 | asection *s = htab->root.splt; |
| 1761 | |
| 1762 | /* If this is the first .plt entry, make room for the special |
| 1763 | first entry. */ |
| 1764 | if (s->size == 0) |
| 1765 | s->size += PLT_ENTRY_SIZE; |
| 1766 | |
| 1767 | h->plt.offset = s->size; |
| 1768 | |
| 1769 | /* If this symbol is not defined in a regular file, and we are |
| 1770 | not generating a shared library, then set the symbol to this |
| 1771 | location in the .plt. This is required to make function |
| 1772 | pointers compare as equal between the normal executable and |
| 1773 | the shared library. */ |
| 1774 | if (! bfd_link_pic (info) |
| 1775 | && !h->def_regular) |
| 1776 | { |
| 1777 | h->root.u.def.section = s; |
| 1778 | h->root.u.def.value = h->plt.offset; |
| 1779 | } |
| 1780 | |
| 1781 | /* Make room for this entry. */ |
| 1782 | s->size += PLT_ENTRY_SIZE; |
| 1783 | |
| 1784 | /* We also need to make an entry in the .got.plt section, which |
| 1785 | will be placed in the .got section by the linker script. */ |
| 1786 | htab->root.sgotplt->size += 4; |
| 1787 | |
| 1788 | /* We also need to make an entry in the .rel.plt section. */ |
| 1789 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); |
| 1790 | } |
| 1791 | else |
| 1792 | { |
| 1793 | h->plt.offset = (bfd_vma) -1; |
| 1794 | h->needs_plt = 0; |
| 1795 | } |
| 1796 | } |
| 1797 | else |
| 1798 | { |
| 1799 | h->plt.offset = (bfd_vma) -1; |
| 1800 | h->needs_plt = 0; |
| 1801 | } |
| 1802 | |
| 1803 | if (h->got.refcount > 0) |
| 1804 | { |
| 1805 | asection *s; |
| 1806 | bfd_boolean dyn; |
| 1807 | |
| 1808 | /* Make sure this symbol is output as a dynamic symbol. |
| 1809 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1810 | if (h->dynindx == -1 |
| 1811 | && !h->forced_local) |
| 1812 | { |
| 1813 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1814 | return FALSE; |
| 1815 | } |
| 1816 | |
| 1817 | s = htab->root.sgot; |
| 1818 | |
| 1819 | h->got.offset = s->size; |
| 1820 | s->size += 4; |
| 1821 | dyn = htab->root.dynamic_sections_created; |
| 1822 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) |
| 1823 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 1824 | } |
| 1825 | else |
| 1826 | h->got.offset = (bfd_vma) -1; |
| 1827 | |
| 1828 | if (h->dyn_relocs == NULL) |
| 1829 | return TRUE; |
| 1830 | |
| 1831 | /* In the shared -Bsymbolic case, discard space allocated for |
| 1832 | dynamic pc-relative relocs against symbols which turn out to be |
| 1833 | defined in regular objects. For the normal shared case, discard |
| 1834 | space for pc-relative relocs that have become local due to symbol |
| 1835 | visibility changes. */ |
| 1836 | |
| 1837 | if (bfd_link_pic (info)) |
| 1838 | { |
| 1839 | if (h->def_regular |
| 1840 | && (h->forced_local |
| 1841 | || info->symbolic)) |
| 1842 | { |
| 1843 | struct elf_dyn_relocs **pp; |
| 1844 | |
| 1845 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) |
| 1846 | { |
| 1847 | p->count -= p->pc_count; |
| 1848 | p->pc_count = 0; |
| 1849 | if (p->count == 0) |
| 1850 | *pp = p->next; |
| 1851 | else |
| 1852 | pp = &p->next; |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | /* Also discard relocs on undefined weak syms with non-default |
| 1857 | visibility. */ |
| 1858 | if (h->dyn_relocs != NULL |
| 1859 | && h->root.type == bfd_link_hash_undefweak) |
| 1860 | { |
| 1861 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 1862 | h->dyn_relocs = NULL; |
| 1863 | |
| 1864 | /* Make sure undefined weak symbols are output as a dynamic |
| 1865 | symbol in PIEs. */ |
| 1866 | else if (h->dynindx == -1 |
| 1867 | && !h->forced_local) |
| 1868 | { |
| 1869 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1870 | return FALSE; |
| 1871 | } |
| 1872 | } |
| 1873 | } |
| 1874 | else |
| 1875 | { |
| 1876 | /* For the non-shared case, discard space for relocs against |
| 1877 | symbols which turn out to need copy relocs or are not |
| 1878 | dynamic. */ |
| 1879 | |
| 1880 | if (!h->non_got_ref |
| 1881 | && ((h->def_dynamic |
| 1882 | && !h->def_regular) |
| 1883 | || (htab->root.dynamic_sections_created |
| 1884 | && (h->root.type == bfd_link_hash_undefweak |
| 1885 | || h->root.type == bfd_link_hash_undefined)))) |
| 1886 | { |
| 1887 | /* Make sure this symbol is output as a dynamic symbol. |
| 1888 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1889 | if (h->dynindx == -1 |
| 1890 | && !h->forced_local) |
| 1891 | { |
| 1892 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1893 | return FALSE; |
| 1894 | } |
| 1895 | |
| 1896 | /* If that succeeded, we know we'll be keeping all the |
| 1897 | relocs. */ |
| 1898 | if (h->dynindx != -1) |
| 1899 | goto keep; |
| 1900 | } |
| 1901 | |
| 1902 | h->dyn_relocs = NULL; |
| 1903 | |
| 1904 | keep: ; |
| 1905 | } |
| 1906 | |
| 1907 | /* Finally, allocate space. */ |
| 1908 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
| 1909 | { |
| 1910 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 1911 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 1912 | } |
| 1913 | |
| 1914 | return TRUE; |
| 1915 | } |
| 1916 | |
| 1917 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 1918 | read-only sections. */ |
| 1919 | |
| 1920 | static bfd_boolean |
| 1921 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) |
| 1922 | { |
| 1923 | asection *sec; |
| 1924 | |
| 1925 | if (h->root.type == bfd_link_hash_indirect) |
| 1926 | return TRUE; |
| 1927 | |
| 1928 | sec = _bfd_elf_readonly_dynrelocs (h); |
| 1929 | if (sec != NULL) |
| 1930 | { |
| 1931 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; |
| 1932 | |
| 1933 | info->flags |= DF_TEXTREL; |
| 1934 | info->callbacks->minfo |
| 1935 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), |
| 1936 | sec->owner, h->root.root.string, sec); |
| 1937 | |
| 1938 | /* Not an error, just cut short the traversal. */ |
| 1939 | return FALSE; |
| 1940 | } |
| 1941 | return TRUE; |
| 1942 | } |
| 1943 | |
| 1944 | /* Set the sizes of the dynamic sections. */ |
| 1945 | |
| 1946 | static bfd_boolean |
| 1947 | lm32_elf_size_dynamic_sections (bfd *output_bfd, |
| 1948 | struct bfd_link_info *info) |
| 1949 | { |
| 1950 | struct elf_lm32_link_hash_table *htab; |
| 1951 | bfd *dynobj; |
| 1952 | asection *s; |
| 1953 | bfd_boolean relocs; |
| 1954 | bfd *ibfd; |
| 1955 | |
| 1956 | htab = lm32_elf_hash_table (info); |
| 1957 | if (htab == NULL) |
| 1958 | return FALSE; |
| 1959 | |
| 1960 | dynobj = htab->root.dynobj; |
| 1961 | BFD_ASSERT (dynobj != NULL); |
| 1962 | |
| 1963 | if (htab->root.dynamic_sections_created) |
| 1964 | { |
| 1965 | /* Set the contents of the .interp section to the interpreter. */ |
| 1966 | if (bfd_link_executable (info) && !info->nointerp) |
| 1967 | { |
| 1968 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 1969 | BFD_ASSERT (s != NULL); |
| 1970 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1971 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1972 | } |
| 1973 | } |
| 1974 | |
| 1975 | /* Set up .got offsets for local syms, and space for local dynamic |
| 1976 | relocs. */ |
| 1977 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 1978 | { |
| 1979 | bfd_signed_vma *local_got; |
| 1980 | bfd_signed_vma *end_local_got; |
| 1981 | bfd_size_type locsymcount; |
| 1982 | Elf_Internal_Shdr *symtab_hdr; |
| 1983 | asection *srel; |
| 1984 | |
| 1985 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 1986 | continue; |
| 1987 | |
| 1988 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 1989 | { |
| 1990 | struct elf_dyn_relocs *p; |
| 1991 | |
| 1992 | for (p = ((struct elf_dyn_relocs *) |
| 1993 | elf_section_data (s)->local_dynrel); |
| 1994 | p != NULL; |
| 1995 | p = p->next) |
| 1996 | { |
| 1997 | if (! bfd_is_abs_section (p->sec) |
| 1998 | && bfd_is_abs_section (p->sec->output_section)) |
| 1999 | { |
| 2000 | /* Input section has been discarded, either because |
| 2001 | it is a copy of a linkonce section or due to |
| 2002 | linker script /DISCARD/, so we'll be discarding |
| 2003 | the relocs too. */ |
| 2004 | } |
| 2005 | else if (p->count != 0) |
| 2006 | { |
| 2007 | srel = elf_section_data (p->sec)->sreloc; |
| 2008 | srel->size += p->count * sizeof (Elf32_External_Rela); |
| 2009 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2010 | info->flags |= DF_TEXTREL; |
| 2011 | } |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | local_got = elf_local_got_refcounts (ibfd); |
| 2016 | if (!local_got) |
| 2017 | continue; |
| 2018 | |
| 2019 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2020 | locsymcount = symtab_hdr->sh_info; |
| 2021 | end_local_got = local_got + locsymcount; |
| 2022 | s = htab->root.sgot; |
| 2023 | srel = htab->root.srelgot; |
| 2024 | for (; local_got < end_local_got; ++local_got) |
| 2025 | { |
| 2026 | if (*local_got > 0) |
| 2027 | { |
| 2028 | *local_got = s->size; |
| 2029 | s->size += 4; |
| 2030 | if (bfd_link_pic (info)) |
| 2031 | srel->size += sizeof (Elf32_External_Rela); |
| 2032 | } |
| 2033 | else |
| 2034 | *local_got = (bfd_vma) -1; |
| 2035 | } |
| 2036 | } |
| 2037 | |
| 2038 | /* Allocate global sym .plt and .got entries, and space for global |
| 2039 | sym dynamic relocs. */ |
| 2040 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); |
| 2041 | |
| 2042 | /* We now have determined the sizes of the various dynamic sections. |
| 2043 | Allocate memory for them. */ |
| 2044 | relocs = FALSE; |
| 2045 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2046 | { |
| 2047 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2048 | continue; |
| 2049 | |
| 2050 | if (s == htab->root.splt |
| 2051 | || s == htab->root.sgot |
| 2052 | || s == htab->root.sgotplt |
| 2053 | || s == htab->sdynbss) |
| 2054 | { |
| 2055 | /* Strip this section if we don't need it; see the |
| 2056 | comment below. */ |
| 2057 | } |
| 2058 | else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) |
| 2059 | { |
| 2060 | if (s->size != 0 && s != htab->root.srelplt) |
| 2061 | relocs = TRUE; |
| 2062 | |
| 2063 | /* We use the reloc_count field as a counter if we need |
| 2064 | to copy relocs into the output file. */ |
| 2065 | s->reloc_count = 0; |
| 2066 | } |
| 2067 | else |
| 2068 | /* It's not one of our sections, so don't allocate space. */ |
| 2069 | continue; |
| 2070 | |
| 2071 | if (s->size == 0) |
| 2072 | { |
| 2073 | /* If we don't need this section, strip it from the |
| 2074 | output file. This is mostly to handle .rela.bss and |
| 2075 | .rela.plt. We must create both sections in |
| 2076 | create_dynamic_sections, because they must be created |
| 2077 | before the linker maps input sections to output |
| 2078 | sections. The linker does that before |
| 2079 | adjust_dynamic_symbol is called, and it is that |
| 2080 | function which decides whether anything needs to go |
| 2081 | into these sections. */ |
| 2082 | s->flags |= SEC_EXCLUDE; |
| 2083 | continue; |
| 2084 | } |
| 2085 | |
| 2086 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2087 | continue; |
| 2088 | |
| 2089 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 2090 | here in case unused entries are not reclaimed before the |
| 2091 | section's contents are written out. This should not happen, |
| 2092 | but this way if it does, we get a R_LM32_NONE reloc instead |
| 2093 | of garbage. */ |
| 2094 | s->contents = bfd_zalloc (dynobj, s->size); |
| 2095 | if (s->contents == NULL) |
| 2096 | return FALSE; |
| 2097 | } |
| 2098 | |
| 2099 | if (htab->root.dynamic_sections_created) |
| 2100 | { |
| 2101 | /* Add some entries to the .dynamic section. We fill in the |
| 2102 | values later, in lm32_elf_finish_dynamic_sections, but we |
| 2103 | must add the entries now so that we get the correct size for |
| 2104 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2105 | dynamic linker and used by the debugger. */ |
| 2106 | #define add_dynamic_entry(TAG, VAL) \ |
| 2107 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2108 | |
| 2109 | if (bfd_link_executable (info)) |
| 2110 | { |
| 2111 | if (! add_dynamic_entry (DT_DEBUG, 0)) |
| 2112 | return FALSE; |
| 2113 | } |
| 2114 | |
| 2115 | if (htab->root.splt->size != 0) |
| 2116 | { |
| 2117 | if (! add_dynamic_entry (DT_PLTGOT, 0) |
| 2118 | || ! add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2119 | || ! add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2120 | || ! add_dynamic_entry (DT_JMPREL, 0)) |
| 2121 | return FALSE; |
| 2122 | } |
| 2123 | |
| 2124 | if (relocs) |
| 2125 | { |
| 2126 | if (! add_dynamic_entry (DT_RELA, 0) |
| 2127 | || ! add_dynamic_entry (DT_RELASZ, 0) |
| 2128 | || ! add_dynamic_entry (DT_RELAENT, |
| 2129 | sizeof (Elf32_External_Rela))) |
| 2130 | return FALSE; |
| 2131 | |
| 2132 | /* If any dynamic relocs apply to a read-only section, |
| 2133 | then we need a DT_TEXTREL entry. */ |
| 2134 | if ((info->flags & DF_TEXTREL) == 0) |
| 2135 | elf_link_hash_traverse (&htab->root, maybe_set_textrel, info); |
| 2136 | |
| 2137 | if ((info->flags & DF_TEXTREL) != 0) |
| 2138 | { |
| 2139 | if (! add_dynamic_entry (DT_TEXTREL, 0)) |
| 2140 | return FALSE; |
| 2141 | } |
| 2142 | } |
| 2143 | } |
| 2144 | #undef add_dynamic_entry |
| 2145 | |
| 2146 | /* Allocate .rofixup section. */ |
| 2147 | if (IS_FDPIC (output_bfd)) |
| 2148 | { |
| 2149 | struct weak_symbol_list *list_start = NULL, *list_end = NULL; |
| 2150 | int rgot_weak_count = 0; |
| 2151 | int r32_count = 0; |
| 2152 | int rgot_count = 0; |
| 2153 | /* Look for deleted sections. */ |
| 2154 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 2155 | { |
| 2156 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2157 | { |
| 2158 | if (s->reloc_count) |
| 2159 | { |
| 2160 | /* Count relocs that need .rofixup entires. */ |
| 2161 | Elf_Internal_Rela *internal_relocs, *end; |
| 2162 | internal_relocs = elf_section_data (s)->relocs; |
| 2163 | if (internal_relocs == NULL) |
| 2164 | internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); |
| 2165 | if (internal_relocs != NULL) |
| 2166 | { |
| 2167 | end = internal_relocs + s->reloc_count; |
| 2168 | while (internal_relocs < end) |
| 2169 | { |
| 2170 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2171 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 2172 | unsigned long r_symndx; |
| 2173 | struct elf_link_hash_entry *h; |
| 2174 | |
| 2175 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2176 | sym_hashes = elf_sym_hashes (ibfd); |
| 2177 | r_symndx = ELF32_R_SYM (internal_relocs->r_info); |
| 2178 | h = NULL; |
| 2179 | if (r_symndx < symtab_hdr->sh_info) |
| 2180 | { |
| 2181 | } |
| 2182 | else |
| 2183 | { |
| 2184 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2185 | while (h->root.type == bfd_link_hash_indirect |
| 2186 | || h->root.type == bfd_link_hash_warning) |
| 2187 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2188 | } |
| 2189 | |
| 2190 | /* Don't generate entries for weak symbols. */ |
| 2191 | if (!h || (h && h->root.type != bfd_link_hash_undefweak)) |
| 2192 | { |
| 2193 | if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0)) |
| 2194 | { |
| 2195 | switch (ELF32_R_TYPE (internal_relocs->r_info)) |
| 2196 | { |
| 2197 | case R_LM32_32: |
| 2198 | r32_count++; |
| 2199 | break; |
| 2200 | case R_LM32_16_GOT: |
| 2201 | rgot_count++; |
| 2202 | break; |
| 2203 | } |
| 2204 | } |
| 2205 | } |
| 2206 | else |
| 2207 | { |
| 2208 | struct weak_symbol_list *current, *new_entry; |
| 2209 | /* Is this symbol already in the list? */ |
| 2210 | for (current = list_start; current; current = current->next) |
| 2211 | { |
| 2212 | if (!strcmp (current->name, h->root.root.string)) |
| 2213 | break; |
| 2214 | } |
| 2215 | if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC)) |
| 2216 | { |
| 2217 | /* Will this have an entry in the GOT. */ |
| 2218 | if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) |
| 2219 | { |
| 2220 | /* Create a new entry. */ |
| 2221 | new_entry = malloc (sizeof (struct weak_symbol_list)); |
| 2222 | if (!new_entry) |
| 2223 | return FALSE; |
| 2224 | new_entry->name = h->root.root.string; |
| 2225 | new_entry->next = NULL; |
| 2226 | /* Add to list */ |
| 2227 | if (list_start == NULL) |
| 2228 | { |
| 2229 | list_start = new_entry; |
| 2230 | list_end = new_entry; |
| 2231 | } |
| 2232 | else |
| 2233 | { |
| 2234 | list_end->next = new_entry; |
| 2235 | list_end = new_entry; |
| 2236 | } |
| 2237 | /* Increase count of undefined weak symbols in the got. */ |
| 2238 | rgot_weak_count++; |
| 2239 | } |
| 2240 | } |
| 2241 | } |
| 2242 | internal_relocs++; |
| 2243 | } |
| 2244 | } |
| 2245 | else |
| 2246 | return FALSE; |
| 2247 | } |
| 2248 | } |
| 2249 | } |
| 2250 | /* Free list. */ |
| 2251 | while (list_start) |
| 2252 | { |
| 2253 | list_end = list_start->next; |
| 2254 | free (list_start); |
| 2255 | list_start = list_end; |
| 2256 | } |
| 2257 | |
| 2258 | /* Size sections. */ |
| 2259 | lm32fdpic_fixup32_section (info)->size |
| 2260 | = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4; |
| 2261 | if (lm32fdpic_fixup32_section (info)->size == 0) |
| 2262 | lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; |
| 2263 | else |
| 2264 | { |
| 2265 | lm32fdpic_fixup32_section (info)->contents = |
| 2266 | bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); |
| 2267 | if (lm32fdpic_fixup32_section (info)->contents == NULL) |
| 2268 | return FALSE; |
| 2269 | } |
| 2270 | } |
| 2271 | |
| 2272 | return TRUE; |
| 2273 | } |
| 2274 | |
| 2275 | /* Create dynamic sections when linking against a dynamic object. */ |
| 2276 | |
| 2277 | static bfd_boolean |
| 2278 | lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2279 | { |
| 2280 | struct elf_lm32_link_hash_table *htab; |
| 2281 | flagword flags, pltflags; |
| 2282 | asection *s; |
| 2283 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 2284 | int ptralign = 2; /* 32bit */ |
| 2285 | |
| 2286 | htab = lm32_elf_hash_table (info); |
| 2287 | if (htab == NULL) |
| 2288 | return FALSE; |
| 2289 | |
| 2290 | /* Make sure we have a GOT - For the case where we have a dynamic object |
| 2291 | but none of the relocs in check_relocs */ |
| 2292 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 2293 | return FALSE; |
| 2294 | if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) |
| 2295 | { |
| 2296 | if (! create_rofixup_section (abfd, info)) |
| 2297 | return FALSE; |
| 2298 | } |
| 2299 | |
| 2300 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 2301 | .rel[a].bss sections. */ |
| 2302 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2303 | | SEC_LINKER_CREATED); |
| 2304 | |
| 2305 | pltflags = flags; |
| 2306 | pltflags |= SEC_CODE; |
| 2307 | if (bed->plt_not_loaded) |
| 2308 | pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
| 2309 | if (bed->plt_readonly) |
| 2310 | pltflags |= SEC_READONLY; |
| 2311 | |
| 2312 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
| 2313 | htab->root.splt = s; |
| 2314 | if (s == NULL |
| 2315 | || !bfd_set_section_alignment (s, bed->plt_alignment)) |
| 2316 | return FALSE; |
| 2317 | |
| 2318 | if (bed->want_plt_sym) |
| 2319 | { |
| 2320 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 2321 | .plt section. */ |
| 2322 | struct bfd_link_hash_entry *bh = NULL; |
| 2323 | struct elf_link_hash_entry *h; |
| 2324 | |
| 2325 | if (! (_bfd_generic_link_add_one_symbol |
| 2326 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
| 2327 | (bfd_vma) 0, NULL, FALSE, |
| 2328 | get_elf_backend_data (abfd)->collect, &bh))) |
| 2329 | return FALSE; |
| 2330 | h = (struct elf_link_hash_entry *) bh; |
| 2331 | h->def_regular = 1; |
| 2332 | h->type = STT_OBJECT; |
| 2333 | htab->root.hplt = h; |
| 2334 | |
| 2335 | if (bfd_link_pic (info) |
| 2336 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2337 | return FALSE; |
| 2338 | } |
| 2339 | |
| 2340 | s = bfd_make_section_anyway_with_flags (abfd, |
| 2341 | bed->default_use_rela_p |
| 2342 | ? ".rela.plt" : ".rel.plt", |
| 2343 | flags | SEC_READONLY); |
| 2344 | htab->root.srelplt = s; |
| 2345 | if (s == NULL |
| 2346 | || !bfd_set_section_alignment (s, ptralign)) |
| 2347 | return FALSE; |
| 2348 | |
| 2349 | if (htab->root.sgot == NULL |
| 2350 | && !_bfd_elf_create_got_section (abfd, info)) |
| 2351 | return FALSE; |
| 2352 | |
| 2353 | if (bed->want_dynbss) |
| 2354 | { |
| 2355 | /* The .dynbss section is a place to put symbols which are defined |
| 2356 | by dynamic objects, are referenced by regular objects, and are |
| 2357 | not functions. We must allocate space for them in the process |
| 2358 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 2359 | initialize them at run time. The linker script puts the .dynbss |
| 2360 | section into the .bss section of the final image. */ |
| 2361 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
| 2362 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 2363 | htab->sdynbss = s; |
| 2364 | if (s == NULL) |
| 2365 | return FALSE; |
| 2366 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 2367 | normally needed. We need to create it here, though, so that the |
| 2368 | linker will map it to an output section. We can't just create it |
| 2369 | only if we need it, because we will not know whether we need it |
| 2370 | until we have seen all the input files, and the first time the |
| 2371 | main linker code calls BFD after examining all the input files |
| 2372 | (size_dynamic_sections) the input sections have already been |
| 2373 | mapped to the output sections. If the section turns out not to |
| 2374 | be needed, we can discard it later. We will never need this |
| 2375 | section when generating a shared object, since they do not use |
| 2376 | copy relocs. */ |
| 2377 | if (! bfd_link_pic (info)) |
| 2378 | { |
| 2379 | s = bfd_make_section_anyway_with_flags (abfd, |
| 2380 | (bed->default_use_rela_p |
| 2381 | ? ".rela.bss" : ".rel.bss"), |
| 2382 | flags | SEC_READONLY); |
| 2383 | htab->srelbss = s; |
| 2384 | if (s == NULL |
| 2385 | || !bfd_set_section_alignment (s, ptralign)) |
| 2386 | return FALSE; |
| 2387 | } |
| 2388 | } |
| 2389 | |
| 2390 | return TRUE; |
| 2391 | } |
| 2392 | |
| 2393 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2394 | |
| 2395 | static void |
| 2396 | lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 2397 | struct elf_link_hash_entry *dir, |
| 2398 | struct elf_link_hash_entry *ind) |
| 2399 | { |
| 2400 | if (ind->dyn_relocs != NULL) |
| 2401 | { |
| 2402 | if (dir->dyn_relocs != NULL) |
| 2403 | { |
| 2404 | struct elf_dyn_relocs **pp; |
| 2405 | struct elf_dyn_relocs *p; |
| 2406 | |
| 2407 | /* Add reloc counts against the indirect sym to the direct sym |
| 2408 | list. Merge any entries against the same section. */ |
| 2409 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL;) |
| 2410 | { |
| 2411 | struct elf_dyn_relocs *q; |
| 2412 | |
| 2413 | for (q = dir->dyn_relocs; q != NULL; q = q->next) |
| 2414 | if (q->sec == p->sec) |
| 2415 | { |
| 2416 | q->pc_count += p->pc_count; |
| 2417 | q->count += p->count; |
| 2418 | *pp = p->next; |
| 2419 | break; |
| 2420 | } |
| 2421 | if (q == NULL) |
| 2422 | pp = &p->next; |
| 2423 | } |
| 2424 | *pp = dir->dyn_relocs; |
| 2425 | } |
| 2426 | |
| 2427 | dir->dyn_relocs = ind->dyn_relocs; |
| 2428 | ind->dyn_relocs = NULL; |
| 2429 | } |
| 2430 | |
| 2431 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2432 | } |
| 2433 | |
| 2434 | static bfd_boolean |
| 2435 | lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) |
| 2436 | { |
| 2437 | if (!bfd_link_relocatable (info)) |
| 2438 | { |
| 2439 | if (!bfd_elf_stack_segment_size (output_bfd, info, |
| 2440 | "__stacksize", DEFAULT_STACK_SIZE)) |
| 2441 | return FALSE; |
| 2442 | |
| 2443 | asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); |
| 2444 | if (sec) |
| 2445 | sec->size = info->stacksize >= 0 ? info->stacksize : 0; |
| 2446 | } |
| 2447 | |
| 2448 | return TRUE; |
| 2449 | } |
| 2450 | |
| 2451 | static bfd_boolean |
| 2452 | lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 2453 | { |
| 2454 | unsigned i; |
| 2455 | |
| 2456 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2457 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2458 | return TRUE; |
| 2459 | |
| 2460 | if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) |
| 2461 | return FALSE; |
| 2462 | |
| 2463 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr |
| 2464 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) |
| 2465 | return TRUE; |
| 2466 | |
| 2467 | /* Copy the stack size. */ |
| 2468 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) |
| 2469 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) |
| 2470 | { |
| 2471 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; |
| 2472 | |
| 2473 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) |
| 2474 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) |
| 2475 | { |
| 2476 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); |
| 2477 | |
| 2478 | /* Rewrite the phdrs, since we're only called after they were first written. */ |
| 2479 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) |
| 2480 | ->s->sizeof_ehdr, SEEK_SET) != 0 |
| 2481 | || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, |
| 2482 | elf_elfheader (obfd)->e_phnum) != 0) |
| 2483 | return FALSE; |
| 2484 | break; |
| 2485 | } |
| 2486 | |
| 2487 | break; |
| 2488 | } |
| 2489 | |
| 2490 | return TRUE; |
| 2491 | } |
| 2492 | |
| 2493 | |
| 2494 | #define ELF_ARCH bfd_arch_lm32 |
| 2495 | #define ELF_TARGET_ID LM32_ELF_DATA |
| 2496 | #define ELF_MACHINE_CODE EM_LATTICEMICO32 |
| 2497 | #define ELF_MAXPAGESIZE 0x1000 |
| 2498 | |
| 2499 | #define TARGET_BIG_SYM lm32_elf32_vec |
| 2500 | #define TARGET_BIG_NAME "elf32-lm32" |
| 2501 | |
| 2502 | #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup |
| 2503 | #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup |
| 2504 | #define elf_info_to_howto lm32_info_to_howto_rela |
| 2505 | #define elf_info_to_howto_rel NULL |
| 2506 | #define elf_backend_rela_normal 1 |
| 2507 | #define elf_backend_object_p lm32_elf_object_p |
| 2508 | #define elf_backend_final_write_processing lm32_elf_final_write_processing |
| 2509 | #define elf_backend_stack_align 8 |
| 2510 | #define elf_backend_can_gc_sections 1 |
| 2511 | #define elf_backend_can_refcount 1 |
| 2512 | #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook |
| 2513 | #define elf_backend_plt_readonly 1 |
| 2514 | #define elf_backend_want_got_plt 1 |
| 2515 | #define elf_backend_want_plt_sym 0 |
| 2516 | #define elf_backend_got_header_size 12 |
| 2517 | #define elf_backend_dtrel_excludes_plt 1 |
| 2518 | #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create |
| 2519 | #define elf_backend_check_relocs lm32_elf_check_relocs |
| 2520 | #define elf_backend_reloc_type_class lm32_elf_reloc_type_class |
| 2521 | #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol |
| 2522 | #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections |
| 2523 | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
| 2524 | #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections |
| 2525 | #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections |
| 2526 | #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol |
| 2527 | #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol |
| 2528 | #define elf_backend_relocate_section lm32_elf_relocate_section |
| 2529 | |
| 2530 | #include "elf32-target.h" |
| 2531 | |
| 2532 | #undef ELF_MAXPAGESIZE |
| 2533 | #define ELF_MAXPAGESIZE 0x4000 |
| 2534 | |
| 2535 | |
| 2536 | #undef TARGET_BIG_SYM |
| 2537 | #define TARGET_BIG_SYM lm32_elf32_fdpic_vec |
| 2538 | #undef TARGET_BIG_NAME |
| 2539 | #define TARGET_BIG_NAME "elf32-lm32fdpic" |
| 2540 | #undef elf32_bed |
| 2541 | #define elf32_bed elf32_lm32fdpic_bed |
| 2542 | |
| 2543 | #undef elf_backend_always_size_sections |
| 2544 | #define elf_backend_always_size_sections lm32_elf_always_size_sections |
| 2545 | #undef bfd_elf32_bfd_copy_private_bfd_data |
| 2546 | #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data |
| 2547 | |
| 2548 | #include "elf32-target.h" |