| 1 | /* Matsushita 10300 specific support for 32-bit ELF |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/mn10300.h" |
| 26 | |
| 27 | static bfd_reloc_status_type mn10300_elf_final_link_relocate |
| 28 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
| 29 | bfd_vma, bfd_vma, bfd_vma, |
| 30 | struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *, |
| 31 | asection *, int)); |
| 32 | static bfd_boolean mn10300_elf_relocate_section |
| 33 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 34 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 35 | static bfd_boolean mn10300_elf_relax_section |
| 36 | PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *)); |
| 37 | static bfd_byte * mn10300_elf_get_relocated_section_contents |
| 38 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| 39 | bfd_byte *, bfd_boolean, asymbol **)); |
| 40 | static unsigned long elf_mn10300_mach |
| 41 | PARAMS ((flagword)); |
| 42 | void _bfd_mn10300_elf_final_write_processing |
| 43 | PARAMS ((bfd *, bfd_boolean)); |
| 44 | bfd_boolean _bfd_mn10300_elf_object_p |
| 45 | PARAMS ((bfd *)); |
| 46 | bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data |
| 47 | PARAMS ((bfd *,bfd *)); |
| 48 | |
| 49 | /* The mn10300 linker needs to keep track of the number of relocs that |
| 50 | it decides to copy in check_relocs for each symbol. This is so |
| 51 | that it can discard PC relative relocs if it doesn't need them when |
| 52 | linking with -Bsymbolic. We store the information in a field |
| 53 | extending the regular ELF linker hash table. */ |
| 54 | |
| 55 | /* This structure keeps track of the number of PC relative relocs we |
| 56 | have copied for a given symbol. */ |
| 57 | |
| 58 | struct elf_mn10300_pcrel_relocs_copied |
| 59 | { |
| 60 | /* Next section. */ |
| 61 | struct elf_mn10300_pcrel_relocs_copied * next; |
| 62 | /* A section in dynobj. */ |
| 63 | asection * section; |
| 64 | /* Number of relocs copied in this section. */ |
| 65 | bfd_size_type count; |
| 66 | }; |
| 67 | |
| 68 | struct elf32_mn10300_link_hash_entry { |
| 69 | /* The basic elf link hash table entry. */ |
| 70 | struct elf_link_hash_entry root; |
| 71 | |
| 72 | /* For function symbols, the number of times this function is |
| 73 | called directly (ie by name). */ |
| 74 | unsigned int direct_calls; |
| 75 | |
| 76 | /* For function symbols, the size of this function's stack |
| 77 | (if <= 255 bytes). We stuff this into "call" instructions |
| 78 | to this target when it's valid and profitable to do so. |
| 79 | |
| 80 | This does not include stack allocated by movm! */ |
| 81 | unsigned char stack_size; |
| 82 | |
| 83 | /* For function symbols, arguments (if any) for movm instruction |
| 84 | in the prologue. We stuff this value into "call" instructions |
| 85 | to the target when it's valid and profitable to do so. */ |
| 86 | unsigned char movm_args; |
| 87 | |
| 88 | /* For function symbols, the amount of stack space that would be allocated |
| 89 | by the movm instruction. This is redundant with movm_args, but we |
| 90 | add it to the hash table to avoid computing it over and over. */ |
| 91 | unsigned char movm_stack_size; |
| 92 | |
| 93 | /* Number of PC relative relocs copied for this symbol. */ |
| 94 | struct elf_mn10300_pcrel_relocs_copied * pcrel_relocs_copied; |
| 95 | |
| 96 | /* When set, convert all "call" instructions to this target into "calls" |
| 97 | instructions. */ |
| 98 | #define MN10300_CONVERT_CALL_TO_CALLS 0x1 |
| 99 | |
| 100 | /* Used to mark functions which have had redundant parts of their |
| 101 | prologue deleted. */ |
| 102 | #define MN10300_DELETED_PROLOGUE_BYTES 0x2 |
| 103 | unsigned char flags; |
| 104 | }; |
| 105 | |
| 106 | /* We derive a hash table from the main elf linker hash table so |
| 107 | we can store state variables and a secondary hash table without |
| 108 | resorting to global variables. */ |
| 109 | struct elf32_mn10300_link_hash_table { |
| 110 | /* The main hash table. */ |
| 111 | struct elf_link_hash_table root; |
| 112 | |
| 113 | /* A hash table for static functions. We could derive a new hash table |
| 114 | instead of using the full elf32_mn10300_link_hash_table if we wanted |
| 115 | to save some memory. */ |
| 116 | struct elf32_mn10300_link_hash_table *static_hash_table; |
| 117 | |
| 118 | /* Random linker state flags. */ |
| 119 | #define MN10300_HASH_ENTRIES_INITIALIZED 0x1 |
| 120 | char flags; |
| 121 | }; |
| 122 | |
| 123 | /* For MN10300 linker hash table. */ |
| 124 | |
| 125 | /* Get the MN10300 ELF linker hash table from a link_info structure. */ |
| 126 | |
| 127 | #define elf32_mn10300_hash_table(p) \ |
| 128 | ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) |
| 129 | |
| 130 | #define elf32_mn10300_link_hash_traverse(table, func, info) \ |
| 131 | (elf_link_hash_traverse \ |
| 132 | (&(table)->root, \ |
| 133 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 134 | (info))) |
| 135 | |
| 136 | static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc |
| 137 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 138 | static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create |
| 139 | PARAMS ((bfd *)); |
| 140 | static void elf32_mn10300_link_hash_table_free |
| 141 | PARAMS ((struct bfd_link_hash_table *)); |
| 142 | |
| 143 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| 144 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 145 | static void mn10300_info_to_howto |
| 146 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 147 | static bfd_boolean mn10300_elf_check_relocs |
| 148 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 149 | const Elf_Internal_Rela *)); |
| 150 | static asection *mn10300_elf_gc_mark_hook |
| 151 | PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *, |
| 152 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 153 | static bfd_boolean mn10300_elf_relax_delete_bytes |
| 154 | PARAMS ((bfd *, asection *, bfd_vma, int)); |
| 155 | static bfd_boolean mn10300_elf_symbol_address_p |
| 156 | PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma)); |
| 157 | static bfd_boolean elf32_mn10300_finish_hash_table_entry |
| 158 | PARAMS ((struct bfd_hash_entry *, PTR)); |
| 159 | static void compute_function_info |
| 160 | PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *, |
| 161 | bfd_vma, unsigned char *)); |
| 162 | |
| 163 | static bfd_boolean _bfd_mn10300_elf_create_got_section |
| 164 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 165 | static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections |
| 166 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 167 | static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol |
| 168 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 169 | static bfd_boolean _bfd_mn10300_elf_discard_copies |
| 170 | PARAMS ((struct elf32_mn10300_link_hash_entry *, |
| 171 | struct bfd_link_info *)); |
| 172 | static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections |
| 173 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 174 | static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol |
| 175 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 176 | Elf_Internal_Sym *)); |
| 177 | static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections |
| 178 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 179 | |
| 180 | static reloc_howto_type elf_mn10300_howto_table[] = { |
| 181 | /* Dummy relocation. Does nothing. */ |
| 182 | HOWTO (R_MN10300_NONE, |
| 183 | 0, |
| 184 | 2, |
| 185 | 16, |
| 186 | FALSE, |
| 187 | 0, |
| 188 | complain_overflow_bitfield, |
| 189 | bfd_elf_generic_reloc, |
| 190 | "R_MN10300_NONE", |
| 191 | FALSE, |
| 192 | 0, |
| 193 | 0, |
| 194 | FALSE), |
| 195 | /* Standard 32 bit reloc. */ |
| 196 | HOWTO (R_MN10300_32, |
| 197 | 0, |
| 198 | 2, |
| 199 | 32, |
| 200 | FALSE, |
| 201 | 0, |
| 202 | complain_overflow_bitfield, |
| 203 | bfd_elf_generic_reloc, |
| 204 | "R_MN10300_32", |
| 205 | FALSE, |
| 206 | 0xffffffff, |
| 207 | 0xffffffff, |
| 208 | FALSE), |
| 209 | /* Standard 16 bit reloc. */ |
| 210 | HOWTO (R_MN10300_16, |
| 211 | 0, |
| 212 | 1, |
| 213 | 16, |
| 214 | FALSE, |
| 215 | 0, |
| 216 | complain_overflow_bitfield, |
| 217 | bfd_elf_generic_reloc, |
| 218 | "R_MN10300_16", |
| 219 | FALSE, |
| 220 | 0xffff, |
| 221 | 0xffff, |
| 222 | FALSE), |
| 223 | /* Standard 8 bit reloc. */ |
| 224 | HOWTO (R_MN10300_8, |
| 225 | 0, |
| 226 | 0, |
| 227 | 8, |
| 228 | FALSE, |
| 229 | 0, |
| 230 | complain_overflow_bitfield, |
| 231 | bfd_elf_generic_reloc, |
| 232 | "R_MN10300_8", |
| 233 | FALSE, |
| 234 | 0xff, |
| 235 | 0xff, |
| 236 | FALSE), |
| 237 | /* Standard 32bit pc-relative reloc. */ |
| 238 | HOWTO (R_MN10300_PCREL32, |
| 239 | 0, |
| 240 | 2, |
| 241 | 32, |
| 242 | TRUE, |
| 243 | 0, |
| 244 | complain_overflow_bitfield, |
| 245 | bfd_elf_generic_reloc, |
| 246 | "R_MN10300_PCREL32", |
| 247 | FALSE, |
| 248 | 0xffffffff, |
| 249 | 0xffffffff, |
| 250 | TRUE), |
| 251 | /* Standard 16bit pc-relative reloc. */ |
| 252 | HOWTO (R_MN10300_PCREL16, |
| 253 | 0, |
| 254 | 1, |
| 255 | 16, |
| 256 | TRUE, |
| 257 | 0, |
| 258 | complain_overflow_bitfield, |
| 259 | bfd_elf_generic_reloc, |
| 260 | "R_MN10300_PCREL16", |
| 261 | FALSE, |
| 262 | 0xffff, |
| 263 | 0xffff, |
| 264 | TRUE), |
| 265 | /* Standard 8 pc-relative reloc. */ |
| 266 | HOWTO (R_MN10300_PCREL8, |
| 267 | 0, |
| 268 | 0, |
| 269 | 8, |
| 270 | TRUE, |
| 271 | 0, |
| 272 | complain_overflow_bitfield, |
| 273 | bfd_elf_generic_reloc, |
| 274 | "R_MN10300_PCREL8", |
| 275 | FALSE, |
| 276 | 0xff, |
| 277 | 0xff, |
| 278 | TRUE), |
| 279 | |
| 280 | /* GNU extension to record C++ vtable hierarchy */ |
| 281 | HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ |
| 282 | 0, /* rightshift */ |
| 283 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 284 | 0, /* bitsize */ |
| 285 | FALSE, /* pc_relative */ |
| 286 | 0, /* bitpos */ |
| 287 | complain_overflow_dont, /* complain_on_overflow */ |
| 288 | NULL, /* special_function */ |
| 289 | "R_MN10300_GNU_VTINHERIT", /* name */ |
| 290 | FALSE, /* partial_inplace */ |
| 291 | 0, /* src_mask */ |
| 292 | 0, /* dst_mask */ |
| 293 | FALSE), /* pcrel_offset */ |
| 294 | |
| 295 | /* GNU extension to record C++ vtable member usage */ |
| 296 | HOWTO (R_MN10300_GNU_VTENTRY, /* type */ |
| 297 | 0, /* rightshift */ |
| 298 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 299 | 0, /* bitsize */ |
| 300 | FALSE, /* pc_relative */ |
| 301 | 0, /* bitpos */ |
| 302 | complain_overflow_dont, /* complain_on_overflow */ |
| 303 | NULL, /* special_function */ |
| 304 | "R_MN10300_GNU_VTENTRY", /* name */ |
| 305 | FALSE, /* partial_inplace */ |
| 306 | 0, /* src_mask */ |
| 307 | 0, /* dst_mask */ |
| 308 | FALSE), /* pcrel_offset */ |
| 309 | |
| 310 | /* Standard 24 bit reloc. */ |
| 311 | HOWTO (R_MN10300_24, |
| 312 | 0, |
| 313 | 2, |
| 314 | 24, |
| 315 | FALSE, |
| 316 | 0, |
| 317 | complain_overflow_bitfield, |
| 318 | bfd_elf_generic_reloc, |
| 319 | "R_MN10300_24", |
| 320 | FALSE, |
| 321 | 0xffffff, |
| 322 | 0xffffff, |
| 323 | FALSE), |
| 324 | HOWTO (R_MN10300_GOTPC32, /* type */ |
| 325 | 0, /* rightshift */ |
| 326 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 327 | 32, /* bitsize */ |
| 328 | TRUE, /* pc_relative */ |
| 329 | 0, /* bitpos */ |
| 330 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 331 | bfd_elf_generic_reloc, /* */ |
| 332 | "R_MN10300_GOTPC32", /* name */ |
| 333 | FALSE, /* partial_inplace */ |
| 334 | 0xffffffff, /* src_mask */ |
| 335 | 0xffffffff, /* dst_mask */ |
| 336 | TRUE), /* pcrel_offset */ |
| 337 | |
| 338 | HOWTO (R_MN10300_GOTPC16, /* type */ |
| 339 | 0, /* rightshift */ |
| 340 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 341 | 16, /* bitsize */ |
| 342 | TRUE, /* pc_relative */ |
| 343 | 0, /* bitpos */ |
| 344 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 345 | bfd_elf_generic_reloc, /* */ |
| 346 | "R_MN10300_GOTPC16", /* name */ |
| 347 | FALSE, /* partial_inplace */ |
| 348 | 0xffff, /* src_mask */ |
| 349 | 0xffff, /* dst_mask */ |
| 350 | TRUE), /* pcrel_offset */ |
| 351 | |
| 352 | HOWTO (R_MN10300_GOTOFF32, /* type */ |
| 353 | 0, /* rightshift */ |
| 354 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 355 | 32, /* bitsize */ |
| 356 | FALSE, /* pc_relative */ |
| 357 | 0, /* bitpos */ |
| 358 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 359 | bfd_elf_generic_reloc, /* */ |
| 360 | "R_MN10300_GOTOFF32", /* name */ |
| 361 | FALSE, /* partial_inplace */ |
| 362 | 0xffffffff, /* src_mask */ |
| 363 | 0xffffffff, /* dst_mask */ |
| 364 | FALSE), /* pcrel_offset */ |
| 365 | |
| 366 | HOWTO (R_MN10300_GOTOFF24, /* type */ |
| 367 | 0, /* rightshift */ |
| 368 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 369 | 24, /* bitsize */ |
| 370 | FALSE, /* pc_relative */ |
| 371 | 0, /* bitpos */ |
| 372 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 373 | bfd_elf_generic_reloc, /* */ |
| 374 | "R_MN10300_GOTOFF24", /* name */ |
| 375 | FALSE, /* partial_inplace */ |
| 376 | 0xffffff, /* src_mask */ |
| 377 | 0xffffff, /* dst_mask */ |
| 378 | FALSE), /* pcrel_offset */ |
| 379 | |
| 380 | HOWTO (R_MN10300_GOTOFF16, /* type */ |
| 381 | 0, /* rightshift */ |
| 382 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 383 | 16, /* bitsize */ |
| 384 | FALSE, /* pc_relative */ |
| 385 | 0, /* bitpos */ |
| 386 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 387 | bfd_elf_generic_reloc, /* */ |
| 388 | "R_MN10300_GOTOFF16", /* name */ |
| 389 | FALSE, /* partial_inplace */ |
| 390 | 0xffff, /* src_mask */ |
| 391 | 0xffff, /* dst_mask */ |
| 392 | FALSE), /* pcrel_offset */ |
| 393 | |
| 394 | HOWTO (R_MN10300_PLT32, /* type */ |
| 395 | 0, /* rightshift */ |
| 396 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 397 | 32, /* bitsize */ |
| 398 | TRUE, /* pc_relative */ |
| 399 | 0, /* bitpos */ |
| 400 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 401 | bfd_elf_generic_reloc, /* */ |
| 402 | "R_MN10300_PLT32", /* name */ |
| 403 | FALSE, /* partial_inplace */ |
| 404 | 0xffffffff, /* src_mask */ |
| 405 | 0xffffffff, /* dst_mask */ |
| 406 | TRUE), /* pcrel_offset */ |
| 407 | |
| 408 | HOWTO (R_MN10300_PLT16, /* type */ |
| 409 | 0, /* rightshift */ |
| 410 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 411 | 16, /* bitsize */ |
| 412 | TRUE, /* pc_relative */ |
| 413 | 0, /* bitpos */ |
| 414 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 415 | bfd_elf_generic_reloc, /* */ |
| 416 | "R_MN10300_PLT16", /* name */ |
| 417 | FALSE, /* partial_inplace */ |
| 418 | 0xffff, /* src_mask */ |
| 419 | 0xffff, /* dst_mask */ |
| 420 | TRUE), /* pcrel_offset */ |
| 421 | |
| 422 | HOWTO (R_MN10300_GOT32, /* type */ |
| 423 | 0, /* rightshift */ |
| 424 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 425 | 32, /* bitsize */ |
| 426 | FALSE, /* pc_relative */ |
| 427 | 0, /* bitpos */ |
| 428 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 429 | bfd_elf_generic_reloc, /* */ |
| 430 | "R_MN10300_GOT32", /* name */ |
| 431 | FALSE, /* partial_inplace */ |
| 432 | 0xffffffff, /* src_mask */ |
| 433 | 0xffffffff, /* dst_mask */ |
| 434 | FALSE), /* pcrel_offset */ |
| 435 | |
| 436 | HOWTO (R_MN10300_GOT24, /* type */ |
| 437 | 0, /* rightshift */ |
| 438 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 439 | 24, /* bitsize */ |
| 440 | FALSE, /* pc_relative */ |
| 441 | 0, /* bitpos */ |
| 442 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 443 | bfd_elf_generic_reloc, /* */ |
| 444 | "R_MN10300_GOT24", /* name */ |
| 445 | FALSE, /* partial_inplace */ |
| 446 | 0xffffffff, /* src_mask */ |
| 447 | 0xffffffff, /* dst_mask */ |
| 448 | FALSE), /* pcrel_offset */ |
| 449 | |
| 450 | HOWTO (R_MN10300_GOT16, /* type */ |
| 451 | 0, /* rightshift */ |
| 452 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 453 | 16, /* bitsize */ |
| 454 | FALSE, /* pc_relative */ |
| 455 | 0, /* bitpos */ |
| 456 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 457 | bfd_elf_generic_reloc, /* */ |
| 458 | "R_MN10300_GOT16", /* name */ |
| 459 | FALSE, /* partial_inplace */ |
| 460 | 0xffffffff, /* src_mask */ |
| 461 | 0xffffffff, /* dst_mask */ |
| 462 | FALSE), /* pcrel_offset */ |
| 463 | |
| 464 | HOWTO (R_MN10300_COPY, /* type */ |
| 465 | 0, /* rightshift */ |
| 466 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 467 | 32, /* bitsize */ |
| 468 | FALSE, /* pc_relative */ |
| 469 | 0, /* bitpos */ |
| 470 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 471 | bfd_elf_generic_reloc, /* */ |
| 472 | "R_MN10300_COPY", /* name */ |
| 473 | FALSE, /* partial_inplace */ |
| 474 | 0xffffffff, /* src_mask */ |
| 475 | 0xffffffff, /* dst_mask */ |
| 476 | FALSE), /* pcrel_offset */ |
| 477 | |
| 478 | HOWTO (R_MN10300_GLOB_DAT, /* type */ |
| 479 | 0, /* rightshift */ |
| 480 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 481 | 32, /* bitsize */ |
| 482 | FALSE, /* pc_relative */ |
| 483 | 0, /* bitpos */ |
| 484 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 485 | bfd_elf_generic_reloc, /* */ |
| 486 | "R_MN10300_GLOB_DAT", /* name */ |
| 487 | FALSE, /* partial_inplace */ |
| 488 | 0xffffffff, /* src_mask */ |
| 489 | 0xffffffff, /* dst_mask */ |
| 490 | FALSE), /* pcrel_offset */ |
| 491 | |
| 492 | HOWTO (R_MN10300_JMP_SLOT, /* type */ |
| 493 | 0, /* rightshift */ |
| 494 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 495 | 32, /* bitsize */ |
| 496 | FALSE, /* pc_relative */ |
| 497 | 0, /* bitpos */ |
| 498 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 499 | bfd_elf_generic_reloc, /* */ |
| 500 | "R_MN10300_JMP_SLOT", /* name */ |
| 501 | FALSE, /* partial_inplace */ |
| 502 | 0xffffffff, /* src_mask */ |
| 503 | 0xffffffff, /* dst_mask */ |
| 504 | FALSE), /* pcrel_offset */ |
| 505 | |
| 506 | HOWTO (R_MN10300_RELATIVE, /* type */ |
| 507 | 0, /* rightshift */ |
| 508 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 509 | 32, /* bitsize */ |
| 510 | FALSE, /* pc_relative */ |
| 511 | 0, /* bitpos */ |
| 512 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 513 | bfd_elf_generic_reloc, /* */ |
| 514 | "R_MN10300_RELATIVE", /* name */ |
| 515 | FALSE, /* partial_inplace */ |
| 516 | 0xffffffff, /* src_mask */ |
| 517 | 0xffffffff, /* dst_mask */ |
| 518 | FALSE), /* pcrel_offset */ |
| 519 | |
| 520 | }; |
| 521 | |
| 522 | struct mn10300_reloc_map { |
| 523 | bfd_reloc_code_real_type bfd_reloc_val; |
| 524 | unsigned char elf_reloc_val; |
| 525 | }; |
| 526 | |
| 527 | static const struct mn10300_reloc_map mn10300_reloc_map[] = { |
| 528 | { BFD_RELOC_NONE, R_MN10300_NONE, }, |
| 529 | { BFD_RELOC_32, R_MN10300_32, }, |
| 530 | { BFD_RELOC_16, R_MN10300_16, }, |
| 531 | { BFD_RELOC_8, R_MN10300_8, }, |
| 532 | { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, |
| 533 | { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, |
| 534 | { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, |
| 535 | { BFD_RELOC_24, R_MN10300_24, }, |
| 536 | { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, |
| 537 | { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, |
| 538 | { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 }, |
| 539 | { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 }, |
| 540 | { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 }, |
| 541 | { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 }, |
| 542 | { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 }, |
| 543 | { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 }, |
| 544 | { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 }, |
| 545 | { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 }, |
| 546 | { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 }, |
| 547 | { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 }, |
| 548 | { BFD_RELOC_MN10300_COPY, R_MN10300_COPY }, |
| 549 | { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT }, |
| 550 | { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT }, |
| 551 | { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE }, |
| 552 | }; |
| 553 | |
| 554 | /* Create the GOT section. */ |
| 555 | |
| 556 | static bfd_boolean |
| 557 | _bfd_mn10300_elf_create_got_section (abfd, info) |
| 558 | bfd * abfd; |
| 559 | struct bfd_link_info * info; |
| 560 | { |
| 561 | flagword flags; |
| 562 | flagword pltflags; |
| 563 | asection * s; |
| 564 | struct bfd_link_hash_entry * bh; |
| 565 | struct elf_link_hash_entry * h; |
| 566 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
| 567 | int ptralign; |
| 568 | |
| 569 | /* This function may be called more than once. */ |
| 570 | if (bfd_get_section_by_name (abfd, ".got") != NULL) |
| 571 | return TRUE; |
| 572 | |
| 573 | switch (bed->s->arch_size) |
| 574 | { |
| 575 | case 32: |
| 576 | ptralign = 2; |
| 577 | break; |
| 578 | |
| 579 | case 64: |
| 580 | ptralign = 3; |
| 581 | break; |
| 582 | |
| 583 | default: |
| 584 | bfd_set_error (bfd_error_bad_value); |
| 585 | return FALSE; |
| 586 | } |
| 587 | |
| 588 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 589 | | SEC_LINKER_CREATED); |
| 590 | |
| 591 | pltflags = flags; |
| 592 | pltflags |= SEC_CODE; |
| 593 | if (bed->plt_not_loaded) |
| 594 | pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
| 595 | if (bed->plt_readonly) |
| 596 | pltflags |= SEC_READONLY; |
| 597 | |
| 598 | s = bfd_make_section (abfd, ".plt"); |
| 599 | if (s == NULL |
| 600 | || ! bfd_set_section_flags (abfd, s, pltflags) |
| 601 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
| 602 | return FALSE; |
| 603 | |
| 604 | if (bed->want_plt_sym) |
| 605 | { |
| 606 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 607 | .plt section. */ |
| 608 | bh = NULL; |
| 609 | if (! (_bfd_generic_link_add_one_symbol |
| 610 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
| 611 | (bfd_vma) 0, (const char *) NULL, FALSE, |
| 612 | get_elf_backend_data (abfd)->collect, &bh))) |
| 613 | return FALSE; |
| 614 | h = (struct elf_link_hash_entry *) bh; |
| 615 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 616 | h->type = STT_OBJECT; |
| 617 | |
| 618 | if (info->shared |
| 619 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 620 | return FALSE; |
| 621 | } |
| 622 | |
| 623 | s = bfd_make_section (abfd, ".got"); |
| 624 | if (s == NULL |
| 625 | || ! bfd_set_section_flags (abfd, s, flags) |
| 626 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 627 | return FALSE; |
| 628 | |
| 629 | if (bed->want_got_plt) |
| 630 | { |
| 631 | s = bfd_make_section (abfd, ".got.plt"); |
| 632 | if (s == NULL |
| 633 | || ! bfd_set_section_flags (abfd, s, flags) |
| 634 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 635 | return FALSE; |
| 636 | } |
| 637 | |
| 638 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 639 | (or .got.plt) section. We don't do this in the linker script |
| 640 | because we don't want to define the symbol if we are not creating |
| 641 | a global offset table. */ |
| 642 | bh = NULL; |
| 643 | if (!(_bfd_generic_link_add_one_symbol |
| 644 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, |
| 645 | bed->got_symbol_offset, (const char *) NULL, FALSE, |
| 646 | bed->collect, &bh))) |
| 647 | return FALSE; |
| 648 | h = (struct elf_link_hash_entry *) bh; |
| 649 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 650 | h->type = STT_OBJECT; |
| 651 | |
| 652 | if (info->shared |
| 653 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 654 | return FALSE; |
| 655 | |
| 656 | elf_hash_table (info)->hgot = h; |
| 657 | |
| 658 | /* The first bit of the global offset table is the header. */ |
| 659 | s->_raw_size += bed->got_header_size + bed->got_symbol_offset; |
| 660 | |
| 661 | return TRUE; |
| 662 | } |
| 663 | |
| 664 | static reloc_howto_type * |
| 665 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| 666 | bfd *abfd ATTRIBUTE_UNUSED; |
| 667 | bfd_reloc_code_real_type code; |
| 668 | { |
| 669 | unsigned int i; |
| 670 | |
| 671 | for (i = 0; |
| 672 | i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); |
| 673 | i++) |
| 674 | { |
| 675 | if (mn10300_reloc_map[i].bfd_reloc_val == code) |
| 676 | return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; |
| 677 | } |
| 678 | |
| 679 | return NULL; |
| 680 | } |
| 681 | |
| 682 | /* Set the howto pointer for an MN10300 ELF reloc. */ |
| 683 | |
| 684 | static void |
| 685 | mn10300_info_to_howto (abfd, cache_ptr, dst) |
| 686 | bfd *abfd ATTRIBUTE_UNUSED; |
| 687 | arelent *cache_ptr; |
| 688 | Elf_Internal_Rela *dst; |
| 689 | { |
| 690 | unsigned int r_type; |
| 691 | |
| 692 | r_type = ELF32_R_TYPE (dst->r_info); |
| 693 | BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); |
| 694 | cache_ptr->howto = &elf_mn10300_howto_table[r_type]; |
| 695 | } |
| 696 | |
| 697 | /* Look through the relocs for a section during the first phase. |
| 698 | Since we don't do .gots or .plts, we just need to consider the |
| 699 | virtual table relocs for gc. */ |
| 700 | |
| 701 | static bfd_boolean |
| 702 | mn10300_elf_check_relocs (abfd, info, sec, relocs) |
| 703 | bfd *abfd; |
| 704 | struct bfd_link_info *info; |
| 705 | asection *sec; |
| 706 | const Elf_Internal_Rela *relocs; |
| 707 | { |
| 708 | Elf_Internal_Shdr *symtab_hdr; |
| 709 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 710 | const Elf_Internal_Rela *rel; |
| 711 | const Elf_Internal_Rela *rel_end; |
| 712 | bfd * dynobj; |
| 713 | bfd_vma * local_got_offsets; |
| 714 | asection * sgot; |
| 715 | asection * srelgot; |
| 716 | asection * sreloc; |
| 717 | |
| 718 | sgot = NULL; |
| 719 | srelgot = NULL; |
| 720 | sreloc = NULL; |
| 721 | |
| 722 | if (info->relocatable) |
| 723 | return TRUE; |
| 724 | |
| 725 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 726 | sym_hashes = elf_sym_hashes (abfd); |
| 727 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| 728 | if (!elf_bad_symtab (abfd)) |
| 729 | sym_hashes_end -= symtab_hdr->sh_info; |
| 730 | |
| 731 | dynobj = elf_hash_table (info)->dynobj; |
| 732 | local_got_offsets = elf_local_got_offsets (abfd); |
| 733 | rel_end = relocs + sec->reloc_count; |
| 734 | for (rel = relocs; rel < rel_end; rel++) |
| 735 | { |
| 736 | struct elf_link_hash_entry *h; |
| 737 | unsigned long r_symndx; |
| 738 | |
| 739 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 740 | if (r_symndx < symtab_hdr->sh_info) |
| 741 | h = NULL; |
| 742 | else |
| 743 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 744 | |
| 745 | /* Some relocs require a global offset table. */ |
| 746 | if (dynobj == NULL) |
| 747 | { |
| 748 | switch (ELF32_R_TYPE (rel->r_info)) |
| 749 | { |
| 750 | case R_MN10300_GOT32: |
| 751 | case R_MN10300_GOT24: |
| 752 | case R_MN10300_GOT16: |
| 753 | case R_MN10300_GOTOFF32: |
| 754 | case R_MN10300_GOTOFF24: |
| 755 | case R_MN10300_GOTOFF16: |
| 756 | case R_MN10300_GOTPC32: |
| 757 | case R_MN10300_GOTPC16: |
| 758 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 759 | if (! _bfd_mn10300_elf_create_got_section (dynobj, info)) |
| 760 | return FALSE; |
| 761 | break; |
| 762 | |
| 763 | default: |
| 764 | break; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | switch (ELF32_R_TYPE (rel->r_info)) |
| 769 | { |
| 770 | /* This relocation describes the C++ object vtable hierarchy. |
| 771 | Reconstruct it for later use during GC. */ |
| 772 | case R_MN10300_GNU_VTINHERIT: |
| 773 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 774 | return FALSE; |
| 775 | break; |
| 776 | |
| 777 | /* This relocation describes which C++ vtable entries are actually |
| 778 | used. Record for later use during GC. */ |
| 779 | case R_MN10300_GNU_VTENTRY: |
| 780 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 781 | return FALSE; |
| 782 | break; |
| 783 | case R_MN10300_GOT32: |
| 784 | case R_MN10300_GOT24: |
| 785 | case R_MN10300_GOT16: |
| 786 | /* This symbol requires a global offset table entry. */ |
| 787 | |
| 788 | if (sgot == NULL) |
| 789 | { |
| 790 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 791 | BFD_ASSERT (sgot != NULL); |
| 792 | } |
| 793 | |
| 794 | if (srelgot == NULL |
| 795 | && (h != NULL || info->shared)) |
| 796 | { |
| 797 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 798 | if (srelgot == NULL) |
| 799 | { |
| 800 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 801 | if (srelgot == NULL |
| 802 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 803 | (SEC_ALLOC |
| 804 | | SEC_LOAD |
| 805 | | SEC_HAS_CONTENTS |
| 806 | | SEC_IN_MEMORY |
| 807 | | SEC_LINKER_CREATED |
| 808 | | SEC_READONLY)) |
| 809 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 810 | return FALSE; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | if (h != NULL) |
| 815 | { |
| 816 | if (h->got.offset != (bfd_vma) -1) |
| 817 | /* We have already allocated space in the .got. */ |
| 818 | break; |
| 819 | |
| 820 | h->got.offset = sgot->_raw_size; |
| 821 | |
| 822 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 823 | if (h->dynindx == -1) |
| 824 | { |
| 825 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 826 | return FALSE; |
| 827 | } |
| 828 | |
| 829 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | /* This is a global offset table entry for a local |
| 834 | symbol. */ |
| 835 | if (local_got_offsets == NULL) |
| 836 | { |
| 837 | size_t size; |
| 838 | unsigned int i; |
| 839 | |
| 840 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 841 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 842 | |
| 843 | if (local_got_offsets == NULL) |
| 844 | return FALSE; |
| 845 | elf_local_got_offsets (abfd) = local_got_offsets; |
| 846 | |
| 847 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 848 | local_got_offsets[i] = (bfd_vma) -1; |
| 849 | } |
| 850 | |
| 851 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 852 | /* We have already allocated space in the .got. */ |
| 853 | break; |
| 854 | |
| 855 | local_got_offsets[r_symndx] = sgot->_raw_size; |
| 856 | |
| 857 | if (info->shared) |
| 858 | /* If we are generating a shared object, we need to |
| 859 | output a R_MN10300_RELATIVE reloc so that the dynamic |
| 860 | linker can adjust this GOT entry. */ |
| 861 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 862 | } |
| 863 | |
| 864 | sgot->_raw_size += 4; |
| 865 | |
| 866 | break; |
| 867 | |
| 868 | case R_MN10300_PLT32: |
| 869 | case R_MN10300_PLT16: |
| 870 | /* This symbol requires a procedure linkage table entry. We |
| 871 | actually build the entry in adjust_dynamic_symbol, |
| 872 | because this might be a case of linking PIC code which is |
| 873 | never referenced by a dynamic object, in which case we |
| 874 | don't need to generate a procedure linkage table entry |
| 875 | after all. */ |
| 876 | |
| 877 | /* If this is a local symbol, we resolve it directly without |
| 878 | creating a procedure linkage table entry. */ |
| 879 | if (h == NULL) |
| 880 | continue; |
| 881 | |
| 882 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
| 883 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) |
| 884 | break; |
| 885 | |
| 886 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 887 | |
| 888 | break; |
| 889 | |
| 890 | case R_MN10300_32: |
| 891 | case R_MN10300_24: |
| 892 | case R_MN10300_16: |
| 893 | case R_MN10300_8: |
| 894 | case R_MN10300_PCREL32: |
| 895 | case R_MN10300_PCREL16: |
| 896 | case R_MN10300_PCREL8: |
| 897 | if (h != NULL) |
| 898 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 899 | |
| 900 | /* If we are creating a shared library, and this is a reloc |
| 901 | against a global symbol, or a non PC relative reloc |
| 902 | against a local symbol, then we need to copy the reloc |
| 903 | into the shared library. However, if we are linking with |
| 904 | -Bsymbolic, we do not need to copy a reloc against a |
| 905 | global symbol which is defined in an object we are |
| 906 | including in the link (i.e., DEF_REGULAR is set). At |
| 907 | this point we have not seen all the input files, so it is |
| 908 | possible that DEF_REGULAR is not set now but will be set |
| 909 | later (it is never cleared). We account for that |
| 910 | possibility below by storing information in the |
| 911 | pcrel_relocs_copied field of the hash table entry. */ |
| 912 | if (info->shared |
| 913 | && (sec->flags & SEC_ALLOC) != 0 |
| 914 | && (! (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)] |
| 915 | .pc_relative) |
| 916 | || (h != NULL |
| 917 | && (! info->symbolic |
| 918 | || h->root.type == bfd_link_hash_defweak |
| 919 | || (h->elf_link_hash_flags |
| 920 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 921 | { |
| 922 | /* When creating a shared object, we must copy these |
| 923 | reloc types into the output file. We create a reloc |
| 924 | section in dynobj and make room for this reloc. */ |
| 925 | if (sreloc == NULL) |
| 926 | { |
| 927 | const char * name; |
| 928 | |
| 929 | name = (bfd_elf_string_from_elf_section |
| 930 | (abfd, |
| 931 | elf_elfheader (abfd)->e_shstrndx, |
| 932 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 933 | if (name == NULL) |
| 934 | return FALSE; |
| 935 | |
| 936 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 937 | && strcmp (bfd_get_section_name (abfd, sec), |
| 938 | name + 5) == 0); |
| 939 | |
| 940 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 941 | if (sreloc == NULL) |
| 942 | { |
| 943 | flagword flags; |
| 944 | |
| 945 | sreloc = bfd_make_section (dynobj, name); |
| 946 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 947 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 948 | if ((sec->flags & SEC_ALLOC) != 0) |
| 949 | flags |= SEC_ALLOC | SEC_LOAD; |
| 950 | if (sreloc == NULL |
| 951 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 952 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 953 | return FALSE; |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 958 | |
| 959 | /* If we are linking with -Bsymbolic, and this is a |
| 960 | global symbol, we count the number of PC relative |
| 961 | relocations we have entered for this symbol, so that |
| 962 | we can discard them again if the symbol is later |
| 963 | defined by a regular object. Note that this function |
| 964 | is only called if we are using an elf_sh linker |
| 965 | hash table, which means that h is really a pointer to |
| 966 | an elf32_mn10300_link_hash_entry. */ |
| 967 | if (h != NULL |
| 968 | && (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)] |
| 969 | .pc_relative)) |
| 970 | { |
| 971 | struct elf32_mn10300_link_hash_entry *eh; |
| 972 | struct elf_mn10300_pcrel_relocs_copied *p; |
| 973 | |
| 974 | eh = (struct elf32_mn10300_link_hash_entry *) h; |
| 975 | |
| 976 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) |
| 977 | if (p->section == sreloc) |
| 978 | break; |
| 979 | |
| 980 | if (p == NULL) |
| 981 | { |
| 982 | p = ((struct elf_mn10300_pcrel_relocs_copied *) |
| 983 | bfd_alloc (dynobj, sizeof *p)); |
| 984 | if (p == NULL) |
| 985 | return FALSE; |
| 986 | |
| 987 | p->next = eh->pcrel_relocs_copied; |
| 988 | eh->pcrel_relocs_copied = p; |
| 989 | p->section = sreloc; |
| 990 | p->count = 0; |
| 991 | } |
| 992 | |
| 993 | ++p->count; |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | break; |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | return TRUE; |
| 1002 | } |
| 1003 | |
| 1004 | /* Return the section that should be marked against GC for a given |
| 1005 | relocation. */ |
| 1006 | |
| 1007 | static asection * |
| 1008 | mn10300_elf_gc_mark_hook (sec, info, rel, h, sym) |
| 1009 | asection *sec; |
| 1010 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1011 | Elf_Internal_Rela *rel; |
| 1012 | struct elf_link_hash_entry *h; |
| 1013 | Elf_Internal_Sym *sym; |
| 1014 | { |
| 1015 | if (h != NULL) |
| 1016 | { |
| 1017 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1018 | { |
| 1019 | case R_MN10300_GNU_VTINHERIT: |
| 1020 | case R_MN10300_GNU_VTENTRY: |
| 1021 | break; |
| 1022 | |
| 1023 | default: |
| 1024 | switch (h->root.type) |
| 1025 | { |
| 1026 | case bfd_link_hash_defined: |
| 1027 | case bfd_link_hash_defweak: |
| 1028 | return h->root.u.def.section; |
| 1029 | |
| 1030 | case bfd_link_hash_common: |
| 1031 | return h->root.u.c.p->section; |
| 1032 | |
| 1033 | default: |
| 1034 | break; |
| 1035 | } |
| 1036 | } |
| 1037 | } |
| 1038 | else |
| 1039 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 1040 | |
| 1041 | return NULL; |
| 1042 | } |
| 1043 | |
| 1044 | /* Perform a relocation as part of a final link. */ |
| 1045 | static bfd_reloc_status_type |
| 1046 | mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1047 | input_section, contents, offset, value, |
| 1048 | addend, h, symndx, info, sym_sec, is_local) |
| 1049 | reloc_howto_type *howto; |
| 1050 | bfd *input_bfd; |
| 1051 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 1052 | asection *input_section; |
| 1053 | bfd_byte *contents; |
| 1054 | bfd_vma offset; |
| 1055 | bfd_vma value; |
| 1056 | bfd_vma addend; |
| 1057 | struct elf_link_hash_entry * h; |
| 1058 | unsigned long symndx; |
| 1059 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1060 | asection *sym_sec ATTRIBUTE_UNUSED; |
| 1061 | int is_local ATTRIBUTE_UNUSED; |
| 1062 | { |
| 1063 | unsigned long r_type = howto->type; |
| 1064 | bfd_byte *hit_data = contents + offset; |
| 1065 | bfd * dynobj; |
| 1066 | bfd_vma * local_got_offsets; |
| 1067 | asection * sgot; |
| 1068 | asection * splt; |
| 1069 | asection * sreloc; |
| 1070 | |
| 1071 | dynobj = elf_hash_table (info)->dynobj; |
| 1072 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1073 | |
| 1074 | sgot = NULL; |
| 1075 | splt = NULL; |
| 1076 | sreloc = NULL; |
| 1077 | |
| 1078 | switch (r_type) |
| 1079 | { |
| 1080 | case R_MN10300_NONE: |
| 1081 | return bfd_reloc_ok; |
| 1082 | |
| 1083 | case R_MN10300_32: |
| 1084 | if (info->shared |
| 1085 | && (input_section->flags & SEC_ALLOC) != 0) |
| 1086 | { |
| 1087 | Elf_Internal_Rela outrel; |
| 1088 | bfd_boolean skip, relocate; |
| 1089 | |
| 1090 | /* When generating a shared object, these relocations are |
| 1091 | copied into the output file to be resolved at run |
| 1092 | time. */ |
| 1093 | if (sreloc == NULL) |
| 1094 | { |
| 1095 | const char * name; |
| 1096 | |
| 1097 | name = (bfd_elf_string_from_elf_section |
| 1098 | (input_bfd, |
| 1099 | elf_elfheader (input_bfd)->e_shstrndx, |
| 1100 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 1101 | if (name == NULL) |
| 1102 | return FALSE; |
| 1103 | |
| 1104 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 1105 | && strcmp (bfd_get_section_name (input_bfd, |
| 1106 | input_section), |
| 1107 | name + 5) == 0); |
| 1108 | |
| 1109 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 1110 | BFD_ASSERT (sreloc != NULL); |
| 1111 | } |
| 1112 | |
| 1113 | skip = FALSE; |
| 1114 | |
| 1115 | if (elf_section_data (input_section)->sec_info == NULL |
| 1116 | || (input_section->sec_info_type != ELF_INFO_TYPE_STABS)) |
| 1117 | outrel.r_offset = offset; |
| 1118 | else |
| 1119 | { |
| 1120 | bfd_vma off; |
| 1121 | |
| 1122 | off = (_bfd_stab_section_offset |
| 1123 | (output_bfd, & elf_hash_table (info)->stab_info, |
| 1124 | input_section, |
| 1125 | & elf_section_data (input_section)->sec_info, |
| 1126 | offset)); |
| 1127 | if (off == (bfd_vma) -1) |
| 1128 | skip = TRUE; |
| 1129 | outrel.r_offset = off; |
| 1130 | } |
| 1131 | |
| 1132 | outrel.r_offset += (input_section->output_section->vma |
| 1133 | + input_section->output_offset); |
| 1134 | |
| 1135 | if (skip) |
| 1136 | { |
| 1137 | memset (&outrel, 0, sizeof outrel); |
| 1138 | relocate = FALSE; |
| 1139 | } |
| 1140 | else |
| 1141 | { |
| 1142 | /* h->dynindx may be -1 if this symbol was marked to |
| 1143 | become local. */ |
| 1144 | if (h == NULL |
| 1145 | || ((info->symbolic || h->dynindx == -1) |
| 1146 | && (h->elf_link_hash_flags |
| 1147 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) |
| 1148 | { |
| 1149 | relocate = TRUE; |
| 1150 | outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); |
| 1151 | outrel.r_addend = value + addend; |
| 1152 | } |
| 1153 | else |
| 1154 | { |
| 1155 | BFD_ASSERT (h->dynindx != -1); |
| 1156 | relocate = FALSE; |
| 1157 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32); |
| 1158 | outrel.r_addend = value + addend; |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1163 | (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents) |
| 1164 | + sreloc->reloc_count)); |
| 1165 | ++sreloc->reloc_count; |
| 1166 | |
| 1167 | /* If this reloc is against an external symbol, we do |
| 1168 | not want to fiddle with the addend. Otherwise, we |
| 1169 | need to include the symbol value so that it becomes |
| 1170 | an addend for the dynamic reloc. */ |
| 1171 | if (! relocate) |
| 1172 | return bfd_reloc_ok; |
| 1173 | } |
| 1174 | value += addend; |
| 1175 | bfd_put_32 (input_bfd, value, hit_data); |
| 1176 | return bfd_reloc_ok; |
| 1177 | |
| 1178 | case R_MN10300_24: |
| 1179 | value += addend; |
| 1180 | |
| 1181 | if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1182 | return bfd_reloc_overflow; |
| 1183 | |
| 1184 | bfd_put_8 (input_bfd, value & 0xff, hit_data); |
| 1185 | bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1186 | bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1187 | return bfd_reloc_ok; |
| 1188 | |
| 1189 | case R_MN10300_16: |
| 1190 | value += addend; |
| 1191 | |
| 1192 | if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1193 | return bfd_reloc_overflow; |
| 1194 | |
| 1195 | bfd_put_16 (input_bfd, value, hit_data); |
| 1196 | return bfd_reloc_ok; |
| 1197 | |
| 1198 | case R_MN10300_8: |
| 1199 | value += addend; |
| 1200 | |
| 1201 | if ((long) value > 0x7f || (long) value < -0x80) |
| 1202 | return bfd_reloc_overflow; |
| 1203 | |
| 1204 | bfd_put_8 (input_bfd, value, hit_data); |
| 1205 | return bfd_reloc_ok; |
| 1206 | |
| 1207 | case R_MN10300_PCREL8: |
| 1208 | value -= (input_section->output_section->vma |
| 1209 | + input_section->output_offset); |
| 1210 | value -= offset; |
| 1211 | value += addend; |
| 1212 | |
| 1213 | if ((long) value > 0xff || (long) value < -0x100) |
| 1214 | return bfd_reloc_overflow; |
| 1215 | |
| 1216 | bfd_put_8 (input_bfd, value, hit_data); |
| 1217 | return bfd_reloc_ok; |
| 1218 | |
| 1219 | case R_MN10300_PCREL16: |
| 1220 | value -= (input_section->output_section->vma |
| 1221 | + input_section->output_offset); |
| 1222 | value -= offset; |
| 1223 | value += addend; |
| 1224 | |
| 1225 | if ((long) value > 0xffff || (long) value < -0x10000) |
| 1226 | return bfd_reloc_overflow; |
| 1227 | |
| 1228 | bfd_put_16 (input_bfd, value, hit_data); |
| 1229 | return bfd_reloc_ok; |
| 1230 | |
| 1231 | case R_MN10300_PCREL32: |
| 1232 | if (info->shared |
| 1233 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1234 | && h != NULL |
| 1235 | && h->dynindx != -1 |
| 1236 | && (! info->symbolic |
| 1237 | || (h->elf_link_hash_flags |
| 1238 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1239 | { |
| 1240 | Elf_Internal_Rela outrel; |
| 1241 | bfd_boolean skip; |
| 1242 | |
| 1243 | /* When generating a shared object, these relocations |
| 1244 | are copied into the output file to be resolved at run |
| 1245 | time. */ |
| 1246 | |
| 1247 | if (sreloc == NULL) |
| 1248 | { |
| 1249 | const char * name; |
| 1250 | |
| 1251 | name = (bfd_elf_string_from_elf_section |
| 1252 | (input_bfd, |
| 1253 | elf_elfheader (input_bfd)->e_shstrndx, |
| 1254 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 1255 | if (name == NULL) |
| 1256 | return FALSE; |
| 1257 | |
| 1258 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 1259 | && strcmp (bfd_get_section_name (input_bfd, |
| 1260 | input_section), |
| 1261 | name + 5) == 0); |
| 1262 | |
| 1263 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 1264 | BFD_ASSERT (sreloc != NULL); |
| 1265 | } |
| 1266 | |
| 1267 | skip = FALSE; |
| 1268 | |
| 1269 | if (elf_section_data (input_section)->sec_info == NULL |
| 1270 | || (input_section->sec_info_type != ELF_INFO_TYPE_STABS)) |
| 1271 | outrel.r_offset = offset; |
| 1272 | else |
| 1273 | { |
| 1274 | bfd_vma off; |
| 1275 | |
| 1276 | off = (_bfd_stab_section_offset |
| 1277 | (output_bfd, & elf_hash_table (info)->stab_info, |
| 1278 | input_section, |
| 1279 | & elf_section_data (input_section)->sec_info, |
| 1280 | offset)); |
| 1281 | if (off == (bfd_vma) -1) |
| 1282 | skip = TRUE; |
| 1283 | outrel.r_offset = off; |
| 1284 | } |
| 1285 | |
| 1286 | outrel.r_offset += (input_section->output_section->vma |
| 1287 | + input_section->output_offset); |
| 1288 | |
| 1289 | if (skip) |
| 1290 | memset (&outrel, 0, sizeof outrel); |
| 1291 | else |
| 1292 | { |
| 1293 | BFD_ASSERT (h != NULL && h->dynindx != -1); |
| 1294 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_PCREL32); |
| 1295 | outrel.r_addend = addend; |
| 1296 | } |
| 1297 | |
| 1298 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1299 | (bfd_byte *) (((Elf32_External_Rela *) |
| 1300 | sreloc->contents) |
| 1301 | + sreloc->reloc_count)); |
| 1302 | ++sreloc->reloc_count; |
| 1303 | |
| 1304 | return bfd_reloc_ok; |
| 1305 | } |
| 1306 | |
| 1307 | value -= (input_section->output_section->vma |
| 1308 | + input_section->output_offset); |
| 1309 | value -= offset; |
| 1310 | value += addend; |
| 1311 | |
| 1312 | bfd_put_32 (input_bfd, value, hit_data); |
| 1313 | return bfd_reloc_ok; |
| 1314 | |
| 1315 | case R_MN10300_GNU_VTINHERIT: |
| 1316 | case R_MN10300_GNU_VTENTRY: |
| 1317 | return bfd_reloc_ok; |
| 1318 | |
| 1319 | case R_MN10300_GOTPC32: |
| 1320 | /* Use global offset table as symbol value. */ |
| 1321 | |
| 1322 | value = bfd_get_section_by_name (dynobj, |
| 1323 | ".got")->output_section->vma; |
| 1324 | value -= (input_section->output_section->vma |
| 1325 | + input_section->output_offset); |
| 1326 | value -= offset; |
| 1327 | value += addend; |
| 1328 | |
| 1329 | bfd_put_32 (input_bfd, value, hit_data); |
| 1330 | return bfd_reloc_ok; |
| 1331 | |
| 1332 | case R_MN10300_GOTPC16: |
| 1333 | /* Use global offset table as symbol value. */ |
| 1334 | |
| 1335 | value = bfd_get_section_by_name (dynobj, |
| 1336 | ".got")->output_section->vma; |
| 1337 | value -= (input_section->output_section->vma |
| 1338 | + input_section->output_offset); |
| 1339 | value -= offset; |
| 1340 | value += addend; |
| 1341 | |
| 1342 | if ((long) value > 0xffff || (long) value < -0x10000) |
| 1343 | return bfd_reloc_overflow; |
| 1344 | |
| 1345 | bfd_put_16 (input_bfd, value, hit_data); |
| 1346 | return bfd_reloc_ok; |
| 1347 | |
| 1348 | case R_MN10300_GOTOFF32: |
| 1349 | value -= bfd_get_section_by_name (dynobj, |
| 1350 | ".got")->output_section->vma; |
| 1351 | value += addend; |
| 1352 | |
| 1353 | bfd_put_32 (input_bfd, value, hit_data); |
| 1354 | return bfd_reloc_ok; |
| 1355 | |
| 1356 | case R_MN10300_GOTOFF24: |
| 1357 | value -= bfd_get_section_by_name (dynobj, |
| 1358 | ".got")->output_section->vma; |
| 1359 | value += addend; |
| 1360 | |
| 1361 | if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1362 | return bfd_reloc_overflow; |
| 1363 | |
| 1364 | bfd_put_8 (input_bfd, value, hit_data); |
| 1365 | bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1366 | bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1367 | return bfd_reloc_ok; |
| 1368 | |
| 1369 | case R_MN10300_GOTOFF16: |
| 1370 | value -= bfd_get_section_by_name (dynobj, |
| 1371 | ".got")->output_section->vma; |
| 1372 | value += addend; |
| 1373 | |
| 1374 | if ((long) value > 0xffff || (long) value < -0x10000) |
| 1375 | return bfd_reloc_overflow; |
| 1376 | |
| 1377 | bfd_put_16 (input_bfd, value, hit_data); |
| 1378 | return bfd_reloc_ok; |
| 1379 | |
| 1380 | case R_MN10300_PLT32: |
| 1381 | if (h != NULL |
| 1382 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
| 1383 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
| 1384 | && h->plt.offset != (bfd_vma) -1) |
| 1385 | { |
| 1386 | asection * splt; |
| 1387 | |
| 1388 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1389 | |
| 1390 | value = (splt->output_section->vma |
| 1391 | + splt->output_offset |
| 1392 | + h->plt.offset) - value; |
| 1393 | } |
| 1394 | |
| 1395 | value -= (input_section->output_section->vma |
| 1396 | + input_section->output_offset); |
| 1397 | value -= offset; |
| 1398 | value += addend; |
| 1399 | |
| 1400 | bfd_put_32 (input_bfd, value, hit_data); |
| 1401 | return bfd_reloc_ok; |
| 1402 | |
| 1403 | case R_MN10300_PLT16: |
| 1404 | if (h != NULL |
| 1405 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
| 1406 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
| 1407 | && h->plt.offset != (bfd_vma) -1) |
| 1408 | { |
| 1409 | asection * splt; |
| 1410 | |
| 1411 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1412 | |
| 1413 | value = (splt->output_section->vma |
| 1414 | + splt->output_offset |
| 1415 | + h->plt.offset) - value; |
| 1416 | } |
| 1417 | |
| 1418 | value -= (input_section->output_section->vma |
| 1419 | + input_section->output_offset); |
| 1420 | value -= offset; |
| 1421 | value += addend; |
| 1422 | |
| 1423 | if ((long) value > 0xffff || (long) value < -0x10000) |
| 1424 | return bfd_reloc_overflow; |
| 1425 | |
| 1426 | bfd_put_16 (input_bfd, value, hit_data); |
| 1427 | return bfd_reloc_ok; |
| 1428 | |
| 1429 | case R_MN10300_GOT32: |
| 1430 | case R_MN10300_GOT24: |
| 1431 | case R_MN10300_GOT16: |
| 1432 | { |
| 1433 | asection * sgot; |
| 1434 | |
| 1435 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1436 | |
| 1437 | if (h != NULL) |
| 1438 | { |
| 1439 | bfd_vma off; |
| 1440 | |
| 1441 | off = h->got.offset; |
| 1442 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1443 | |
| 1444 | if (! elf_hash_table (info)->dynamic_sections_created |
| 1445 | || (info->shared |
| 1446 | && (info->symbolic || h->dynindx == -1) |
| 1447 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 1448 | /* This is actually a static link, or it is a |
| 1449 | -Bsymbolic link and the symbol is defined |
| 1450 | locally, or the symbol was forced to be local |
| 1451 | because of a version file. We must initialize |
| 1452 | this entry in the global offset table. |
| 1453 | |
| 1454 | When doing a dynamic link, we create a .rela.got |
| 1455 | relocation entry to initialize the value. This |
| 1456 | is done in the finish_dynamic_symbol routine. */ |
| 1457 | bfd_put_32 (output_bfd, value, |
| 1458 | sgot->contents + off); |
| 1459 | |
| 1460 | value = sgot->output_offset + off; |
| 1461 | } |
| 1462 | else |
| 1463 | { |
| 1464 | bfd_vma off; |
| 1465 | |
| 1466 | off = elf_local_got_offsets (input_bfd)[symndx]; |
| 1467 | |
| 1468 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 1469 | |
| 1470 | if (info->shared) |
| 1471 | { |
| 1472 | asection * srelgot; |
| 1473 | Elf_Internal_Rela outrel; |
| 1474 | |
| 1475 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1476 | BFD_ASSERT (srelgot != NULL); |
| 1477 | |
| 1478 | outrel.r_offset = (sgot->output_section->vma |
| 1479 | + sgot->output_offset |
| 1480 | + off); |
| 1481 | outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); |
| 1482 | outrel.r_addend = value; |
| 1483 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1484 | (bfd_byte *) (((Elf32_External_Rela *) |
| 1485 | srelgot->contents) |
| 1486 | + srelgot->reloc_count)); |
| 1487 | ++ srelgot->reloc_count; |
| 1488 | } |
| 1489 | |
| 1490 | value = sgot->output_offset + off; |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | value += addend; |
| 1495 | |
| 1496 | if (r_type == R_MN10300_GOT32) |
| 1497 | { |
| 1498 | bfd_put_32 (input_bfd, value, hit_data); |
| 1499 | return bfd_reloc_ok; |
| 1500 | } |
| 1501 | else if (r_type == R_MN10300_GOT24) |
| 1502 | { |
| 1503 | if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1504 | return bfd_reloc_overflow; |
| 1505 | |
| 1506 | bfd_put_8 (input_bfd, value & 0xff, hit_data); |
| 1507 | bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1508 | bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1509 | return bfd_reloc_ok; |
| 1510 | } |
| 1511 | else if (r_type == R_MN10300_GOT16) |
| 1512 | { |
| 1513 | if ((long) value > 0xffff || (long) value < -0x10000) |
| 1514 | return bfd_reloc_overflow; |
| 1515 | |
| 1516 | bfd_put_16 (input_bfd, value, hit_data); |
| 1517 | return bfd_reloc_ok; |
| 1518 | } |
| 1519 | /* Fall through. */ |
| 1520 | |
| 1521 | default: |
| 1522 | return bfd_reloc_notsupported; |
| 1523 | } |
| 1524 | } |
| 1525 | \f |
| 1526 | /* Relocate an MN10300 ELF section. */ |
| 1527 | static bfd_boolean |
| 1528 | mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1529 | contents, relocs, local_syms, local_sections) |
| 1530 | bfd *output_bfd; |
| 1531 | struct bfd_link_info *info; |
| 1532 | bfd *input_bfd; |
| 1533 | asection *input_section; |
| 1534 | bfd_byte *contents; |
| 1535 | Elf_Internal_Rela *relocs; |
| 1536 | Elf_Internal_Sym *local_syms; |
| 1537 | asection **local_sections; |
| 1538 | { |
| 1539 | Elf_Internal_Shdr *symtab_hdr; |
| 1540 | struct elf_link_hash_entry **sym_hashes; |
| 1541 | Elf_Internal_Rela *rel, *relend; |
| 1542 | |
| 1543 | if (info->relocatable) |
| 1544 | return TRUE; |
| 1545 | |
| 1546 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1547 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1548 | |
| 1549 | rel = relocs; |
| 1550 | relend = relocs + input_section->reloc_count; |
| 1551 | for (; rel < relend; rel++) |
| 1552 | { |
| 1553 | int r_type; |
| 1554 | reloc_howto_type *howto; |
| 1555 | unsigned long r_symndx; |
| 1556 | Elf_Internal_Sym *sym; |
| 1557 | asection *sec; |
| 1558 | struct elf32_mn10300_link_hash_entry *h; |
| 1559 | bfd_vma relocation; |
| 1560 | bfd_reloc_status_type r; |
| 1561 | |
| 1562 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1563 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1564 | howto = elf_mn10300_howto_table + r_type; |
| 1565 | |
| 1566 | /* Just skip the vtable gc relocs. */ |
| 1567 | if (r_type == R_MN10300_GNU_VTINHERIT |
| 1568 | || r_type == R_MN10300_GNU_VTENTRY) |
| 1569 | continue; |
| 1570 | |
| 1571 | h = NULL; |
| 1572 | sym = NULL; |
| 1573 | sec = NULL; |
| 1574 | if (r_symndx < symtab_hdr->sh_info) |
| 1575 | { |
| 1576 | sym = local_syms + r_symndx; |
| 1577 | sec = local_sections[r_symndx]; |
| 1578 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1579 | } |
| 1580 | else |
| 1581 | { |
| 1582 | bfd_boolean unresolved_reloc; |
| 1583 | bfd_boolean warned; |
| 1584 | struct elf_link_hash_entry *hh; |
| 1585 | |
| 1586 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1587 | r_symndx, symtab_hdr, sym_hashes, |
| 1588 | hh, sec, relocation, |
| 1589 | unresolved_reloc, warned); |
| 1590 | |
| 1591 | h = (struct elf32_mn10300_link_hash_entry *) hh; |
| 1592 | |
| 1593 | if ((h->root.root.type == bfd_link_hash_defined |
| 1594 | || h->root.root.type == bfd_link_hash_defweak) |
| 1595 | && ( r_type == R_MN10300_GOTPC32 |
| 1596 | || r_type == R_MN10300_GOTPC16 |
| 1597 | || (( r_type == R_MN10300_PLT32 |
| 1598 | || r_type == R_MN10300_PLT16) |
| 1599 | && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL |
| 1600 | && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN |
| 1601 | && h->root.plt.offset != (bfd_vma) -1) |
| 1602 | || (( r_type == R_MN10300_GOT32 |
| 1603 | || r_type == R_MN10300_GOT24 |
| 1604 | || r_type == R_MN10300_GOT16) |
| 1605 | && elf_hash_table (info)->dynamic_sections_created |
| 1606 | && (! info->shared |
| 1607 | || (! info->symbolic && h->root.dynindx != -1) |
| 1608 | || (h->root.elf_link_hash_flags |
| 1609 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1610 | || (info->shared |
| 1611 | && ((! info->symbolic && h->root.dynindx != -1) |
| 1612 | || (h->root.elf_link_hash_flags |
| 1613 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1614 | && ( r_type == R_MN10300_32 |
| 1615 | || r_type == R_MN10300_PCREL32) |
| 1616 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 1617 | /* DWARF will emit R_MN10300_32 relocations |
| 1618 | in its sections against symbols defined |
| 1619 | externally in shared libraries. We can't |
| 1620 | do anything with them here. */ |
| 1621 | || ((input_section->flags & SEC_DEBUGGING) != 0 |
| 1622 | && (h->root.elf_link_hash_flags |
| 1623 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0))))) |
| 1624 | /* In these cases, we don't need the relocation |
| 1625 | value. We check specially because in some |
| 1626 | obscure cases sec->output_section will be NULL. */ |
| 1627 | relocation = 0; |
| 1628 | |
| 1629 | else if (unresolved_reloc) |
| 1630 | (*_bfd_error_handler) |
| 1631 | (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), |
| 1632 | bfd_get_filename (input_bfd), h->root.root.root.string, |
| 1633 | bfd_get_section_name (input_bfd, input_section)); |
| 1634 | } |
| 1635 | |
| 1636 | r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1637 | input_section, |
| 1638 | contents, rel->r_offset, |
| 1639 | relocation, rel->r_addend, |
| 1640 | (struct elf_link_hash_entry *)h, |
| 1641 | r_symndx, |
| 1642 | info, sec, h == NULL); |
| 1643 | |
| 1644 | if (r != bfd_reloc_ok) |
| 1645 | { |
| 1646 | const char *name; |
| 1647 | const char *msg = (const char *) 0; |
| 1648 | |
| 1649 | if (h != NULL) |
| 1650 | name = h->root.root.root.string; |
| 1651 | else |
| 1652 | { |
| 1653 | name = (bfd_elf_string_from_elf_section |
| 1654 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1655 | if (name == NULL || *name == '\0') |
| 1656 | name = bfd_section_name (input_bfd, sec); |
| 1657 | } |
| 1658 | |
| 1659 | switch (r) |
| 1660 | { |
| 1661 | case bfd_reloc_overflow: |
| 1662 | if (! ((*info->callbacks->reloc_overflow) |
| 1663 | (info, name, howto->name, (bfd_vma) 0, |
| 1664 | input_bfd, input_section, rel->r_offset))) |
| 1665 | return FALSE; |
| 1666 | break; |
| 1667 | |
| 1668 | case bfd_reloc_undefined: |
| 1669 | if (! ((*info->callbacks->undefined_symbol) |
| 1670 | (info, name, input_bfd, input_section, |
| 1671 | rel->r_offset, TRUE))) |
| 1672 | return FALSE; |
| 1673 | break; |
| 1674 | |
| 1675 | case bfd_reloc_outofrange: |
| 1676 | msg = _("internal error: out of range error"); |
| 1677 | goto common_error; |
| 1678 | |
| 1679 | case bfd_reloc_notsupported: |
| 1680 | msg = _("internal error: unsupported relocation error"); |
| 1681 | goto common_error; |
| 1682 | |
| 1683 | case bfd_reloc_dangerous: |
| 1684 | msg = _("internal error: dangerous error"); |
| 1685 | goto common_error; |
| 1686 | |
| 1687 | default: |
| 1688 | msg = _("internal error: unknown error"); |
| 1689 | /* fall through */ |
| 1690 | |
| 1691 | common_error: |
| 1692 | if (!((*info->callbacks->warning) |
| 1693 | (info, msg, name, input_bfd, input_section, |
| 1694 | rel->r_offset))) |
| 1695 | return FALSE; |
| 1696 | break; |
| 1697 | } |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | return TRUE; |
| 1702 | } |
| 1703 | |
| 1704 | /* Finish initializing one hash table entry. */ |
| 1705 | static bfd_boolean |
| 1706 | elf32_mn10300_finish_hash_table_entry (gen_entry, in_args) |
| 1707 | struct bfd_hash_entry *gen_entry; |
| 1708 | PTR in_args ATTRIBUTE_UNUSED; |
| 1709 | { |
| 1710 | struct elf32_mn10300_link_hash_entry *entry; |
| 1711 | unsigned int byte_count = 0; |
| 1712 | |
| 1713 | entry = (struct elf32_mn10300_link_hash_entry *) gen_entry; |
| 1714 | |
| 1715 | if (entry->root.root.type == bfd_link_hash_warning) |
| 1716 | entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link; |
| 1717 | |
| 1718 | /* If we already know we want to convert "call" to "calls" for calls |
| 1719 | to this symbol, then return now. */ |
| 1720 | if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) |
| 1721 | return TRUE; |
| 1722 | |
| 1723 | /* If there are no named calls to this symbol, or there's nothing we |
| 1724 | can move from the function itself into the "call" instruction, then |
| 1725 | note that all "call" instructions should be converted into "calls" |
| 1726 | instructions and return. */ |
| 1727 | if (entry->direct_calls == 0 |
| 1728 | || (entry->stack_size == 0 && entry->movm_args == 0)) |
| 1729 | { |
| 1730 | /* Make a note that we should convert "call" instructions to "calls" |
| 1731 | instructions for calls to this symbol. */ |
| 1732 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1733 | return TRUE; |
| 1734 | } |
| 1735 | |
| 1736 | /* We may be able to move some instructions from the function itself into |
| 1737 | the "call" instruction. Count how many bytes we might be able to |
| 1738 | eliminate in the function itself. */ |
| 1739 | |
| 1740 | /* A movm instruction is two bytes. */ |
| 1741 | if (entry->movm_args) |
| 1742 | byte_count += 2; |
| 1743 | |
| 1744 | /* Count the insn to allocate stack space too. */ |
| 1745 | if (entry->stack_size > 0) |
| 1746 | { |
| 1747 | if (entry->stack_size <= 128) |
| 1748 | byte_count += 3; |
| 1749 | else |
| 1750 | byte_count += 4; |
| 1751 | } |
| 1752 | |
| 1753 | /* If using "call" will result in larger code, then turn all |
| 1754 | the associated "call" instructions into "calls" instructions. */ |
| 1755 | if (byte_count < entry->direct_calls) |
| 1756 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1757 | |
| 1758 | /* This routine never fails. */ |
| 1759 | return TRUE; |
| 1760 | } |
| 1761 | |
| 1762 | /* This function handles relaxing for the mn10300. |
| 1763 | |
| 1764 | There are quite a few relaxing opportunities available on the mn10300: |
| 1765 | |
| 1766 | * calls:32 -> calls:16 2 bytes |
| 1767 | * call:32 -> call:16 2 bytes |
| 1768 | |
| 1769 | * call:32 -> calls:32 1 byte |
| 1770 | * call:16 -> calls:16 1 byte |
| 1771 | * These are done anytime using "calls" would result |
| 1772 | in smaller code, or when necessary to preserve the |
| 1773 | meaning of the program. |
| 1774 | |
| 1775 | * call:32 varies |
| 1776 | * call:16 |
| 1777 | * In some circumstances we can move instructions |
| 1778 | from a function prologue into a "call" instruction. |
| 1779 | This is only done if the resulting code is no larger |
| 1780 | than the original code. |
| 1781 | |
| 1782 | * jmp:32 -> jmp:16 2 bytes |
| 1783 | * jmp:16 -> bra:8 1 byte |
| 1784 | |
| 1785 | * If the previous instruction is a conditional branch |
| 1786 | around the jump/bra, we may be able to reverse its condition |
| 1787 | and change its target to the jump's target. The jump/bra |
| 1788 | can then be deleted. 2 bytes |
| 1789 | |
| 1790 | * mov abs32 -> mov abs16 1 or 2 bytes |
| 1791 | |
| 1792 | * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes |
| 1793 | - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes |
| 1794 | |
| 1795 | * Most instructions which accept d32 can relax to d16 1 or 2 bytes |
| 1796 | - Most instructions which accept d16 can relax to d8 1 or 2 bytes |
| 1797 | |
| 1798 | We don't handle imm16->imm8 or d16->d8 as they're very rare |
| 1799 | and somewhat more difficult to support. */ |
| 1800 | |
| 1801 | static bfd_boolean |
| 1802 | mn10300_elf_relax_section (abfd, sec, link_info, again) |
| 1803 | bfd *abfd; |
| 1804 | asection *sec; |
| 1805 | struct bfd_link_info *link_info; |
| 1806 | bfd_boolean *again; |
| 1807 | { |
| 1808 | Elf_Internal_Shdr *symtab_hdr; |
| 1809 | Elf_Internal_Rela *internal_relocs = NULL; |
| 1810 | Elf_Internal_Rela *irel, *irelend; |
| 1811 | bfd_byte *contents = NULL; |
| 1812 | Elf_Internal_Sym *isymbuf = NULL; |
| 1813 | struct elf32_mn10300_link_hash_table *hash_table; |
| 1814 | asection *section = sec; |
| 1815 | |
| 1816 | /* Assume nothing changes. */ |
| 1817 | *again = FALSE; |
| 1818 | |
| 1819 | /* We need a pointer to the mn10300 specific hash table. */ |
| 1820 | hash_table = elf32_mn10300_hash_table (link_info); |
| 1821 | |
| 1822 | /* Initialize fields in each hash table entry the first time through. */ |
| 1823 | if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) |
| 1824 | { |
| 1825 | bfd *input_bfd; |
| 1826 | |
| 1827 | /* Iterate over all the input bfds. */ |
| 1828 | for (input_bfd = link_info->input_bfds; |
| 1829 | input_bfd != NULL; |
| 1830 | input_bfd = input_bfd->link_next) |
| 1831 | { |
| 1832 | /* We're going to need all the symbols for each bfd. */ |
| 1833 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1834 | if (symtab_hdr->sh_info != 0) |
| 1835 | { |
| 1836 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1837 | if (isymbuf == NULL) |
| 1838 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 1839 | symtab_hdr->sh_info, 0, |
| 1840 | NULL, NULL, NULL); |
| 1841 | if (isymbuf == NULL) |
| 1842 | goto error_return; |
| 1843 | } |
| 1844 | |
| 1845 | /* Iterate over each section in this bfd. */ |
| 1846 | for (section = input_bfd->sections; |
| 1847 | section != NULL; |
| 1848 | section = section->next) |
| 1849 | { |
| 1850 | struct elf32_mn10300_link_hash_entry *hash; |
| 1851 | Elf_Internal_Sym *sym; |
| 1852 | asection *sym_sec = NULL; |
| 1853 | const char *sym_name; |
| 1854 | char *new_name; |
| 1855 | |
| 1856 | /* If there's nothing to do in this section, skip it. */ |
| 1857 | if (! (((section->flags & SEC_RELOC) != 0 |
| 1858 | && section->reloc_count != 0) |
| 1859 | || (section->flags & SEC_CODE) != 0)) |
| 1860 | continue; |
| 1861 | |
| 1862 | /* Get cached copy of section contents if it exists. */ |
| 1863 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 1864 | contents = elf_section_data (section)->this_hdr.contents; |
| 1865 | else if (section->_raw_size != 0) |
| 1866 | { |
| 1867 | /* Go get them off disk. */ |
| 1868 | contents = (bfd_byte *) bfd_malloc (section->_raw_size); |
| 1869 | if (contents == NULL) |
| 1870 | goto error_return; |
| 1871 | |
| 1872 | if (!bfd_get_section_contents (input_bfd, section, |
| 1873 | contents, (file_ptr) 0, |
| 1874 | section->_raw_size)) |
| 1875 | goto error_return; |
| 1876 | } |
| 1877 | else |
| 1878 | contents = NULL; |
| 1879 | |
| 1880 | /* If there aren't any relocs, then there's nothing to do. */ |
| 1881 | if ((section->flags & SEC_RELOC) != 0 |
| 1882 | && section->reloc_count != 0) |
| 1883 | { |
| 1884 | |
| 1885 | /* Get a copy of the native relocations. */ |
| 1886 | internal_relocs = (_bfd_elf_link_read_relocs |
| 1887 | (input_bfd, section, (PTR) NULL, |
| 1888 | (Elf_Internal_Rela *) NULL, |
| 1889 | link_info->keep_memory)); |
| 1890 | if (internal_relocs == NULL) |
| 1891 | goto error_return; |
| 1892 | |
| 1893 | /* Now examine each relocation. */ |
| 1894 | irel = internal_relocs; |
| 1895 | irelend = irel + section->reloc_count; |
| 1896 | for (; irel < irelend; irel++) |
| 1897 | { |
| 1898 | long r_type; |
| 1899 | unsigned long r_index; |
| 1900 | unsigned char code; |
| 1901 | |
| 1902 | r_type = ELF32_R_TYPE (irel->r_info); |
| 1903 | r_index = ELF32_R_SYM (irel->r_info); |
| 1904 | |
| 1905 | if (r_type < 0 || r_type >= (int) R_MN10300_MAX) |
| 1906 | goto error_return; |
| 1907 | |
| 1908 | /* We need the name and hash table entry of the target |
| 1909 | symbol! */ |
| 1910 | hash = NULL; |
| 1911 | sym = NULL; |
| 1912 | sym_sec = NULL; |
| 1913 | |
| 1914 | if (r_index < symtab_hdr->sh_info) |
| 1915 | { |
| 1916 | /* A local symbol. */ |
| 1917 | Elf_Internal_Sym *isym; |
| 1918 | struct elf_link_hash_table *elftab; |
| 1919 | bfd_size_type amt; |
| 1920 | |
| 1921 | isym = isymbuf + r_index; |
| 1922 | if (isym->st_shndx == SHN_UNDEF) |
| 1923 | sym_sec = bfd_und_section_ptr; |
| 1924 | else if (isym->st_shndx == SHN_ABS) |
| 1925 | sym_sec = bfd_abs_section_ptr; |
| 1926 | else if (isym->st_shndx == SHN_COMMON) |
| 1927 | sym_sec = bfd_com_section_ptr; |
| 1928 | else |
| 1929 | sym_sec |
| 1930 | = bfd_section_from_elf_index (input_bfd, |
| 1931 | isym->st_shndx); |
| 1932 | |
| 1933 | sym_name |
| 1934 | = bfd_elf_string_from_elf_section (input_bfd, |
| 1935 | (symtab_hdr |
| 1936 | ->sh_link), |
| 1937 | isym->st_name); |
| 1938 | |
| 1939 | /* If it isn't a function, then we don't care |
| 1940 | about it. */ |
| 1941 | if (ELF_ST_TYPE (isym->st_info) != STT_FUNC) |
| 1942 | continue; |
| 1943 | |
| 1944 | /* Tack on an ID so we can uniquely identify this |
| 1945 | local symbol in the global hash table. */ |
| 1946 | amt = strlen (sym_name) + 10; |
| 1947 | new_name = bfd_malloc (amt); |
| 1948 | if (new_name == 0) |
| 1949 | goto error_return; |
| 1950 | |
| 1951 | sprintf (new_name, "%s_%08x", |
| 1952 | sym_name, (int) sym_sec); |
| 1953 | sym_name = new_name; |
| 1954 | |
| 1955 | elftab = &hash_table->static_hash_table->root; |
| 1956 | hash = ((struct elf32_mn10300_link_hash_entry *) |
| 1957 | elf_link_hash_lookup (elftab, sym_name, |
| 1958 | TRUE, TRUE, FALSE)); |
| 1959 | free (new_name); |
| 1960 | } |
| 1961 | else |
| 1962 | { |
| 1963 | r_index -= symtab_hdr->sh_info; |
| 1964 | hash = (struct elf32_mn10300_link_hash_entry *) |
| 1965 | elf_sym_hashes (input_bfd)[r_index]; |
| 1966 | } |
| 1967 | |
| 1968 | /* If this is not a "call" instruction, then we |
| 1969 | should convert "call" instructions to "calls" |
| 1970 | instructions. */ |
| 1971 | code = bfd_get_8 (input_bfd, |
| 1972 | contents + irel->r_offset - 1); |
| 1973 | if (code != 0xdd && code != 0xcd) |
| 1974 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1975 | |
| 1976 | /* If this is a jump/call, then bump the |
| 1977 | direct_calls counter. Else force "call" to |
| 1978 | "calls" conversions. */ |
| 1979 | if (r_type == R_MN10300_PCREL32 |
| 1980 | || r_type == R_MN10300_PLT32 |
| 1981 | || r_type == R_MN10300_PLT16 |
| 1982 | || r_type == R_MN10300_PCREL16) |
| 1983 | hash->direct_calls++; |
| 1984 | else |
| 1985 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1986 | } |
| 1987 | } |
| 1988 | |
| 1989 | /* Now look at the actual contents to get the stack size, |
| 1990 | and a list of what registers were saved in the prologue |
| 1991 | (ie movm_args). */ |
| 1992 | if ((section->flags & SEC_CODE) != 0) |
| 1993 | { |
| 1994 | Elf_Internal_Sym *isym, *isymend; |
| 1995 | unsigned int sec_shndx; |
| 1996 | struct elf_link_hash_entry **hashes; |
| 1997 | struct elf_link_hash_entry **end_hashes; |
| 1998 | unsigned int symcount; |
| 1999 | |
| 2000 | sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
| 2001 | section); |
| 2002 | |
| 2003 | /* Look at each function defined in this section and |
| 2004 | update info for that function. */ |
| 2005 | isymend = isymbuf + symtab_hdr->sh_info; |
| 2006 | for (isym = isymbuf; isym < isymend; isym++) |
| 2007 | { |
| 2008 | if (isym->st_shndx == sec_shndx |
| 2009 | && ELF_ST_TYPE (isym->st_info) == STT_FUNC) |
| 2010 | { |
| 2011 | struct elf_link_hash_table *elftab; |
| 2012 | bfd_size_type amt; |
| 2013 | |
| 2014 | if (isym->st_shndx == SHN_UNDEF) |
| 2015 | sym_sec = bfd_und_section_ptr; |
| 2016 | else if (isym->st_shndx == SHN_ABS) |
| 2017 | sym_sec = bfd_abs_section_ptr; |
| 2018 | else if (isym->st_shndx == SHN_COMMON) |
| 2019 | sym_sec = bfd_com_section_ptr; |
| 2020 | else |
| 2021 | sym_sec |
| 2022 | = bfd_section_from_elf_index (input_bfd, |
| 2023 | isym->st_shndx); |
| 2024 | |
| 2025 | sym_name = (bfd_elf_string_from_elf_section |
| 2026 | (input_bfd, symtab_hdr->sh_link, |
| 2027 | isym->st_name)); |
| 2028 | |
| 2029 | /* Tack on an ID so we can uniquely identify this |
| 2030 | local symbol in the global hash table. */ |
| 2031 | amt = strlen (sym_name) + 10; |
| 2032 | new_name = bfd_malloc (amt); |
| 2033 | if (new_name == 0) |
| 2034 | goto error_return; |
| 2035 | |
| 2036 | sprintf (new_name, "%s_%08x", |
| 2037 | sym_name, (int) sym_sec); |
| 2038 | sym_name = new_name; |
| 2039 | |
| 2040 | elftab = &hash_table->static_hash_table->root; |
| 2041 | hash = ((struct elf32_mn10300_link_hash_entry *) |
| 2042 | elf_link_hash_lookup (elftab, sym_name, |
| 2043 | TRUE, TRUE, FALSE)); |
| 2044 | free (new_name); |
| 2045 | compute_function_info (input_bfd, hash, |
| 2046 | isym->st_value, contents); |
| 2047 | } |
| 2048 | } |
| 2049 | |
| 2050 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2051 | - symtab_hdr->sh_info); |
| 2052 | hashes = elf_sym_hashes (input_bfd); |
| 2053 | end_hashes = hashes + symcount; |
| 2054 | for (; hashes < end_hashes; hashes++) |
| 2055 | { |
| 2056 | hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
| 2057 | if ((hash->root.root.type == bfd_link_hash_defined |
| 2058 | || hash->root.root.type == bfd_link_hash_defweak) |
| 2059 | && hash->root.root.u.def.section == section |
| 2060 | && ELF_ST_TYPE (isym->st_info) == STT_FUNC) |
| 2061 | compute_function_info (input_bfd, hash, |
| 2062 | (hash)->root.root.u.def.value, |
| 2063 | contents); |
| 2064 | } |
| 2065 | } |
| 2066 | |
| 2067 | /* Cache or free any memory we allocated for the relocs. */ |
| 2068 | if (internal_relocs != NULL |
| 2069 | && elf_section_data (section)->relocs != internal_relocs) |
| 2070 | free (internal_relocs); |
| 2071 | internal_relocs = NULL; |
| 2072 | |
| 2073 | /* Cache or free any memory we allocated for the contents. */ |
| 2074 | if (contents != NULL |
| 2075 | && elf_section_data (section)->this_hdr.contents != contents) |
| 2076 | { |
| 2077 | if (! link_info->keep_memory) |
| 2078 | free (contents); |
| 2079 | else |
| 2080 | { |
| 2081 | /* Cache the section contents for elf_link_input_bfd. */ |
| 2082 | elf_section_data (section)->this_hdr.contents = contents; |
| 2083 | } |
| 2084 | } |
| 2085 | contents = NULL; |
| 2086 | } |
| 2087 | |
| 2088 | /* Cache or free any memory we allocated for the symbols. */ |
| 2089 | if (isymbuf != NULL |
| 2090 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2091 | { |
| 2092 | if (! link_info->keep_memory) |
| 2093 | free (isymbuf); |
| 2094 | else |
| 2095 | { |
| 2096 | /* Cache the symbols for elf_link_input_bfd. */ |
| 2097 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2098 | } |
| 2099 | } |
| 2100 | isymbuf = NULL; |
| 2101 | } |
| 2102 | |
| 2103 | /* Now iterate on each symbol in the hash table and perform |
| 2104 | the final initialization steps on each. */ |
| 2105 | elf32_mn10300_link_hash_traverse (hash_table, |
| 2106 | elf32_mn10300_finish_hash_table_entry, |
| 2107 | NULL); |
| 2108 | elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, |
| 2109 | elf32_mn10300_finish_hash_table_entry, |
| 2110 | NULL); |
| 2111 | |
| 2112 | /* All entries in the hash table are fully initialized. */ |
| 2113 | hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; |
| 2114 | |
| 2115 | /* Now that everything has been initialized, go through each |
| 2116 | code section and delete any prologue insns which will be |
| 2117 | redundant because their operations will be performed by |
| 2118 | a "call" instruction. */ |
| 2119 | for (input_bfd = link_info->input_bfds; |
| 2120 | input_bfd != NULL; |
| 2121 | input_bfd = input_bfd->link_next) |
| 2122 | { |
| 2123 | /* We're going to need all the local symbols for each bfd. */ |
| 2124 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2125 | if (symtab_hdr->sh_info != 0) |
| 2126 | { |
| 2127 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2128 | if (isymbuf == NULL) |
| 2129 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 2130 | symtab_hdr->sh_info, 0, |
| 2131 | NULL, NULL, NULL); |
| 2132 | if (isymbuf == NULL) |
| 2133 | goto error_return; |
| 2134 | } |
| 2135 | |
| 2136 | /* Walk over each section in this bfd. */ |
| 2137 | for (section = input_bfd->sections; |
| 2138 | section != NULL; |
| 2139 | section = section->next) |
| 2140 | { |
| 2141 | unsigned int sec_shndx; |
| 2142 | Elf_Internal_Sym *isym, *isymend; |
| 2143 | struct elf_link_hash_entry **hashes; |
| 2144 | struct elf_link_hash_entry **end_hashes; |
| 2145 | unsigned int symcount; |
| 2146 | |
| 2147 | /* Skip non-code sections and empty sections. */ |
| 2148 | if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0) |
| 2149 | continue; |
| 2150 | |
| 2151 | if (section->reloc_count != 0) |
| 2152 | { |
| 2153 | /* Get a copy of the native relocations. */ |
| 2154 | internal_relocs = (_bfd_elf_link_read_relocs |
| 2155 | (input_bfd, section, (PTR) NULL, |
| 2156 | (Elf_Internal_Rela *) NULL, |
| 2157 | link_info->keep_memory)); |
| 2158 | if (internal_relocs == NULL) |
| 2159 | goto error_return; |
| 2160 | } |
| 2161 | |
| 2162 | /* Get cached copy of section contents if it exists. */ |
| 2163 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 2164 | contents = elf_section_data (section)->this_hdr.contents; |
| 2165 | else |
| 2166 | { |
| 2167 | /* Go get them off disk. */ |
| 2168 | contents = (bfd_byte *) bfd_malloc (section->_raw_size); |
| 2169 | if (contents == NULL) |
| 2170 | goto error_return; |
| 2171 | |
| 2172 | if (!bfd_get_section_contents (input_bfd, section, |
| 2173 | contents, (file_ptr) 0, |
| 2174 | section->_raw_size)) |
| 2175 | goto error_return; |
| 2176 | } |
| 2177 | |
| 2178 | sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
| 2179 | section); |
| 2180 | |
| 2181 | /* Now look for any function in this section which needs |
| 2182 | insns deleted from its prologue. */ |
| 2183 | isymend = isymbuf + symtab_hdr->sh_info; |
| 2184 | for (isym = isymbuf; isym < isymend; isym++) |
| 2185 | { |
| 2186 | struct elf32_mn10300_link_hash_entry *sym_hash; |
| 2187 | asection *sym_sec = NULL; |
| 2188 | const char *sym_name; |
| 2189 | char *new_name; |
| 2190 | struct elf_link_hash_table *elftab; |
| 2191 | bfd_size_type amt; |
| 2192 | |
| 2193 | if (isym->st_shndx != sec_shndx) |
| 2194 | continue; |
| 2195 | |
| 2196 | if (isym->st_shndx == SHN_UNDEF) |
| 2197 | sym_sec = bfd_und_section_ptr; |
| 2198 | else if (isym->st_shndx == SHN_ABS) |
| 2199 | sym_sec = bfd_abs_section_ptr; |
| 2200 | else if (isym->st_shndx == SHN_COMMON) |
| 2201 | sym_sec = bfd_com_section_ptr; |
| 2202 | else |
| 2203 | sym_sec |
| 2204 | = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 2205 | |
| 2206 | sym_name |
| 2207 | = bfd_elf_string_from_elf_section (input_bfd, |
| 2208 | symtab_hdr->sh_link, |
| 2209 | isym->st_name); |
| 2210 | |
| 2211 | /* Tack on an ID so we can uniquely identify this |
| 2212 | local symbol in the global hash table. */ |
| 2213 | amt = strlen (sym_name) + 10; |
| 2214 | new_name = bfd_malloc (amt); |
| 2215 | if (new_name == 0) |
| 2216 | goto error_return; |
| 2217 | sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); |
| 2218 | sym_name = new_name; |
| 2219 | |
| 2220 | elftab = &hash_table->static_hash_table->root; |
| 2221 | sym_hash = ((struct elf32_mn10300_link_hash_entry *) |
| 2222 | elf_link_hash_lookup (elftab, sym_name, |
| 2223 | FALSE, FALSE, FALSE)); |
| 2224 | |
| 2225 | free (new_name); |
| 2226 | if (sym_hash == NULL) |
| 2227 | continue; |
| 2228 | |
| 2229 | if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) |
| 2230 | && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) |
| 2231 | { |
| 2232 | int bytes = 0; |
| 2233 | |
| 2234 | /* Note that we've changed things. */ |
| 2235 | elf_section_data (section)->relocs = internal_relocs; |
| 2236 | elf_section_data (section)->this_hdr.contents = contents; |
| 2237 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2238 | |
| 2239 | /* Count how many bytes we're going to delete. */ |
| 2240 | if (sym_hash->movm_args) |
| 2241 | bytes += 2; |
| 2242 | |
| 2243 | if (sym_hash->stack_size > 0) |
| 2244 | { |
| 2245 | if (sym_hash->stack_size <= 128) |
| 2246 | bytes += 3; |
| 2247 | else |
| 2248 | bytes += 4; |
| 2249 | } |
| 2250 | |
| 2251 | /* Note that we've deleted prologue bytes for this |
| 2252 | function. */ |
| 2253 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; |
| 2254 | |
| 2255 | /* Actually delete the bytes. */ |
| 2256 | if (!mn10300_elf_relax_delete_bytes (input_bfd, |
| 2257 | section, |
| 2258 | isym->st_value, |
| 2259 | bytes)) |
| 2260 | goto error_return; |
| 2261 | |
| 2262 | /* Something changed. Not strictly necessary, but |
| 2263 | may lead to more relaxing opportunities. */ |
| 2264 | *again = TRUE; |
| 2265 | } |
| 2266 | } |
| 2267 | |
| 2268 | /* Look for any global functions in this section which |
| 2269 | need insns deleted from their prologues. */ |
| 2270 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2271 | - symtab_hdr->sh_info); |
| 2272 | hashes = elf_sym_hashes (input_bfd); |
| 2273 | end_hashes = hashes + symcount; |
| 2274 | for (; hashes < end_hashes; hashes++) |
| 2275 | { |
| 2276 | struct elf32_mn10300_link_hash_entry *sym_hash; |
| 2277 | |
| 2278 | sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
| 2279 | if ((sym_hash->root.root.type == bfd_link_hash_defined |
| 2280 | || sym_hash->root.root.type == bfd_link_hash_defweak) |
| 2281 | && sym_hash->root.root.u.def.section == section |
| 2282 | && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) |
| 2283 | && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) |
| 2284 | { |
| 2285 | int bytes = 0; |
| 2286 | bfd_vma symval; |
| 2287 | |
| 2288 | /* Note that we've changed things. */ |
| 2289 | elf_section_data (section)->relocs = internal_relocs; |
| 2290 | elf_section_data (section)->this_hdr.contents = contents; |
| 2291 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2292 | |
| 2293 | /* Count how many bytes we're going to delete. */ |
| 2294 | if (sym_hash->movm_args) |
| 2295 | bytes += 2; |
| 2296 | |
| 2297 | if (sym_hash->stack_size > 0) |
| 2298 | { |
| 2299 | if (sym_hash->stack_size <= 128) |
| 2300 | bytes += 3; |
| 2301 | else |
| 2302 | bytes += 4; |
| 2303 | } |
| 2304 | |
| 2305 | /* Note that we've deleted prologue bytes for this |
| 2306 | function. */ |
| 2307 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; |
| 2308 | |
| 2309 | /* Actually delete the bytes. */ |
| 2310 | symval = sym_hash->root.root.u.def.value; |
| 2311 | if (!mn10300_elf_relax_delete_bytes (input_bfd, |
| 2312 | section, |
| 2313 | symval, |
| 2314 | bytes)) |
| 2315 | goto error_return; |
| 2316 | |
| 2317 | /* Something changed. Not strictly necessary, but |
| 2318 | may lead to more relaxing opportunities. */ |
| 2319 | *again = TRUE; |
| 2320 | } |
| 2321 | } |
| 2322 | |
| 2323 | /* Cache or free any memory we allocated for the relocs. */ |
| 2324 | if (internal_relocs != NULL |
| 2325 | && elf_section_data (section)->relocs != internal_relocs) |
| 2326 | free (internal_relocs); |
| 2327 | internal_relocs = NULL; |
| 2328 | |
| 2329 | /* Cache or free any memory we allocated for the contents. */ |
| 2330 | if (contents != NULL |
| 2331 | && elf_section_data (section)->this_hdr.contents != contents) |
| 2332 | { |
| 2333 | if (! link_info->keep_memory) |
| 2334 | free (contents); |
| 2335 | else |
| 2336 | { |
| 2337 | /* Cache the section contents for elf_link_input_bfd. */ |
| 2338 | elf_section_data (section)->this_hdr.contents = contents; |
| 2339 | } |
| 2340 | } |
| 2341 | contents = NULL; |
| 2342 | } |
| 2343 | |
| 2344 | /* Cache or free any memory we allocated for the symbols. */ |
| 2345 | if (isymbuf != NULL |
| 2346 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2347 | { |
| 2348 | if (! link_info->keep_memory) |
| 2349 | free (isymbuf); |
| 2350 | else |
| 2351 | { |
| 2352 | /* Cache the symbols for elf_link_input_bfd. */ |
| 2353 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2354 | } |
| 2355 | } |
| 2356 | isymbuf = NULL; |
| 2357 | } |
| 2358 | } |
| 2359 | |
| 2360 | /* (Re)initialize for the basic instruction shortening/relaxing pass. */ |
| 2361 | contents = NULL; |
| 2362 | internal_relocs = NULL; |
| 2363 | isymbuf = NULL; |
| 2364 | /* For error_return. */ |
| 2365 | section = sec; |
| 2366 | |
| 2367 | /* We don't have to do anything for a relocatable link, if |
| 2368 | this section does not have relocs, or if this is not a |
| 2369 | code section. */ |
| 2370 | if (link_info->relocatable |
| 2371 | || (sec->flags & SEC_RELOC) == 0 |
| 2372 | || sec->reloc_count == 0 |
| 2373 | || (sec->flags & SEC_CODE) == 0) |
| 2374 | return TRUE; |
| 2375 | |
| 2376 | /* If this is the first time we have been called for this section, |
| 2377 | initialize the cooked size. */ |
| 2378 | if (sec->_cooked_size == 0) |
| 2379 | sec->_cooked_size = sec->_raw_size; |
| 2380 | |
| 2381 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2382 | |
| 2383 | /* Get a copy of the native relocations. */ |
| 2384 | internal_relocs = (_bfd_elf_link_read_relocs |
| 2385 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 2386 | link_info->keep_memory)); |
| 2387 | if (internal_relocs == NULL) |
| 2388 | goto error_return; |
| 2389 | |
| 2390 | /* Walk through them looking for relaxing opportunities. */ |
| 2391 | irelend = internal_relocs + sec->reloc_count; |
| 2392 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2393 | { |
| 2394 | bfd_vma symval; |
| 2395 | struct elf32_mn10300_link_hash_entry *h = NULL; |
| 2396 | |
| 2397 | /* If this isn't something that can be relaxed, then ignore |
| 2398 | this reloc. */ |
| 2399 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE |
| 2400 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 |
| 2401 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) |
| 2402 | continue; |
| 2403 | |
| 2404 | /* Get the section contents if we haven't done so already. */ |
| 2405 | if (contents == NULL) |
| 2406 | { |
| 2407 | /* Get cached copy if it exists. */ |
| 2408 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2409 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2410 | else |
| 2411 | { |
| 2412 | /* Go get them off disk. */ |
| 2413 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| 2414 | if (contents == NULL) |
| 2415 | goto error_return; |
| 2416 | |
| 2417 | if (! bfd_get_section_contents (abfd, sec, contents, |
| 2418 | (file_ptr) 0, sec->_raw_size)) |
| 2419 | goto error_return; |
| 2420 | } |
| 2421 | } |
| 2422 | |
| 2423 | /* Read this BFD's symbols if we haven't done so already. */ |
| 2424 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 2425 | { |
| 2426 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2427 | if (isymbuf == NULL) |
| 2428 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2429 | symtab_hdr->sh_info, 0, |
| 2430 | NULL, NULL, NULL); |
| 2431 | if (isymbuf == NULL) |
| 2432 | goto error_return; |
| 2433 | } |
| 2434 | |
| 2435 | /* Get the value of the symbol referred to by the reloc. */ |
| 2436 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2437 | { |
| 2438 | Elf_Internal_Sym *isym; |
| 2439 | asection *sym_sec = NULL; |
| 2440 | const char *sym_name; |
| 2441 | char *new_name; |
| 2442 | |
| 2443 | /* A local symbol. */ |
| 2444 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 2445 | if (isym->st_shndx == SHN_UNDEF) |
| 2446 | sym_sec = bfd_und_section_ptr; |
| 2447 | else if (isym->st_shndx == SHN_ABS) |
| 2448 | sym_sec = bfd_abs_section_ptr; |
| 2449 | else if (isym->st_shndx == SHN_COMMON) |
| 2450 | sym_sec = bfd_com_section_ptr; |
| 2451 | else |
| 2452 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2453 | |
| 2454 | symval = (isym->st_value |
| 2455 | + sym_sec->output_section->vma |
| 2456 | + sym_sec->output_offset); |
| 2457 | sym_name = bfd_elf_string_from_elf_section (abfd, |
| 2458 | symtab_hdr->sh_link, |
| 2459 | isym->st_name); |
| 2460 | |
| 2461 | /* Tack on an ID so we can uniquely identify this |
| 2462 | local symbol in the global hash table. */ |
| 2463 | new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10); |
| 2464 | if (new_name == 0) |
| 2465 | goto error_return; |
| 2466 | sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); |
| 2467 | sym_name = new_name; |
| 2468 | |
| 2469 | h = (struct elf32_mn10300_link_hash_entry *) |
| 2470 | elf_link_hash_lookup (&hash_table->static_hash_table->root, |
| 2471 | sym_name, FALSE, FALSE, FALSE); |
| 2472 | free (new_name); |
| 2473 | } |
| 2474 | else |
| 2475 | { |
| 2476 | unsigned long indx; |
| 2477 | |
| 2478 | /* An external symbol. */ |
| 2479 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2480 | h = (struct elf32_mn10300_link_hash_entry *) |
| 2481 | (elf_sym_hashes (abfd)[indx]); |
| 2482 | BFD_ASSERT (h != NULL); |
| 2483 | if (h->root.root.type != bfd_link_hash_defined |
| 2484 | && h->root.root.type != bfd_link_hash_defweak) |
| 2485 | { |
| 2486 | /* This appears to be a reference to an undefined |
| 2487 | symbol. Just ignore it--it will be caught by the |
| 2488 | regular reloc processing. */ |
| 2489 | continue; |
| 2490 | } |
| 2491 | |
| 2492 | symval = (h->root.root.u.def.value |
| 2493 | + h->root.root.u.def.section->output_section->vma |
| 2494 | + h->root.root.u.def.section->output_offset); |
| 2495 | } |
| 2496 | |
| 2497 | /* For simplicity of coding, we are going to modify the section |
| 2498 | contents, the section relocs, and the BFD symbol table. We |
| 2499 | must tell the rest of the code not to free up this |
| 2500 | information. It would be possible to instead create a table |
| 2501 | of changes which have to be made, as is done in coff-mips.c; |
| 2502 | that would be more work, but would require less memory when |
| 2503 | the linker is run. */ |
| 2504 | |
| 2505 | /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative |
| 2506 | branch/call, also deal with "call" -> "calls" conversions and |
| 2507 | insertion of prologue data into "call" instructions. */ |
| 2508 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32 |
| 2509 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32) |
| 2510 | { |
| 2511 | bfd_vma value = symval; |
| 2512 | |
| 2513 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32 |
| 2514 | && h != NULL |
| 2515 | && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL |
| 2516 | && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN |
| 2517 | && h->root.plt.offset != (bfd_vma) -1) |
| 2518 | { |
| 2519 | asection * splt; |
| 2520 | |
| 2521 | splt = bfd_get_section_by_name (elf_hash_table (link_info) |
| 2522 | ->dynobj, ".plt"); |
| 2523 | |
| 2524 | value = ((splt->output_section->vma |
| 2525 | + splt->output_offset |
| 2526 | + h->root.plt.offset) |
| 2527 | - (sec->output_section->vma |
| 2528 | + sec->output_offset |
| 2529 | + irel->r_offset)); |
| 2530 | } |
| 2531 | |
| 2532 | /* If we've got a "call" instruction that needs to be turned |
| 2533 | into a "calls" instruction, do so now. It saves a byte. */ |
| 2534 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) |
| 2535 | { |
| 2536 | unsigned char code; |
| 2537 | |
| 2538 | /* Get the opcode. */ |
| 2539 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2540 | |
| 2541 | /* Make sure we're working with a "call" instruction! */ |
| 2542 | if (code == 0xdd) |
| 2543 | { |
| 2544 | /* Note that we've changed the relocs, section contents, |
| 2545 | etc. */ |
| 2546 | elf_section_data (sec)->relocs = internal_relocs; |
| 2547 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2548 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2549 | |
| 2550 | /* Fix the opcode. */ |
| 2551 | bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); |
| 2552 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); |
| 2553 | |
| 2554 | /* Fix irel->r_offset and irel->r_addend. */ |
| 2555 | irel->r_offset += 1; |
| 2556 | irel->r_addend += 1; |
| 2557 | |
| 2558 | /* Delete one byte of data. */ |
| 2559 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2560 | irel->r_offset + 3, 1)) |
| 2561 | goto error_return; |
| 2562 | |
| 2563 | /* That will change things, so, we should relax again. |
| 2564 | Note that this is not required, and it may be slow. */ |
| 2565 | *again = TRUE; |
| 2566 | } |
| 2567 | } |
| 2568 | else if (h) |
| 2569 | { |
| 2570 | /* We've got a "call" instruction which needs some data |
| 2571 | from target function filled in. */ |
| 2572 | unsigned char code; |
| 2573 | |
| 2574 | /* Get the opcode. */ |
| 2575 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2576 | |
| 2577 | /* Insert data from the target function into the "call" |
| 2578 | instruction if needed. */ |
| 2579 | if (code == 0xdd) |
| 2580 | { |
| 2581 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); |
| 2582 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, |
| 2583 | contents + irel->r_offset + 5); |
| 2584 | } |
| 2585 | } |
| 2586 | |
| 2587 | /* Deal with pc-relative gunk. */ |
| 2588 | value -= (sec->output_section->vma + sec->output_offset); |
| 2589 | value -= irel->r_offset; |
| 2590 | value += irel->r_addend; |
| 2591 | |
| 2592 | /* See if the value will fit in 16 bits, note the high value is |
| 2593 | 0x7fff + 2 as the target will be two bytes closer if we are |
| 2594 | able to relax. */ |
| 2595 | if ((long) value < 0x8001 && (long) value > -0x8000) |
| 2596 | { |
| 2597 | unsigned char code; |
| 2598 | |
| 2599 | /* Get the opcode. */ |
| 2600 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2601 | |
| 2602 | if (code != 0xdc && code != 0xdd && code != 0xff) |
| 2603 | continue; |
| 2604 | |
| 2605 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2606 | elf_section_data (sec)->relocs = internal_relocs; |
| 2607 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2608 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2609 | |
| 2610 | /* Fix the opcode. */ |
| 2611 | if (code == 0xdc) |
| 2612 | bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); |
| 2613 | else if (code == 0xdd) |
| 2614 | bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); |
| 2615 | else if (code == 0xff) |
| 2616 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 2617 | |
| 2618 | /* Fix the relocation's type. */ |
| 2619 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2620 | (ELF32_R_TYPE (irel->r_info) |
| 2621 | == (int) R_MN10300_PLT32) |
| 2622 | ? R_MN10300_PLT16 : |
| 2623 | R_MN10300_PCREL16); |
| 2624 | |
| 2625 | /* Delete two bytes of data. */ |
| 2626 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2627 | irel->r_offset + 1, 2)) |
| 2628 | goto error_return; |
| 2629 | |
| 2630 | /* That will change things, so, we should relax again. |
| 2631 | Note that this is not required, and it may be slow. */ |
| 2632 | *again = TRUE; |
| 2633 | } |
| 2634 | } |
| 2635 | |
| 2636 | /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative |
| 2637 | branch. */ |
| 2638 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) |
| 2639 | { |
| 2640 | bfd_vma value = symval; |
| 2641 | |
| 2642 | /* If we've got a "call" instruction that needs to be turned |
| 2643 | into a "calls" instruction, do so now. It saves a byte. */ |
| 2644 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) |
| 2645 | { |
| 2646 | unsigned char code; |
| 2647 | |
| 2648 | /* Get the opcode. */ |
| 2649 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2650 | |
| 2651 | /* Make sure we're working with a "call" instruction! */ |
| 2652 | if (code == 0xcd) |
| 2653 | { |
| 2654 | /* Note that we've changed the relocs, section contents, |
| 2655 | etc. */ |
| 2656 | elf_section_data (sec)->relocs = internal_relocs; |
| 2657 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2658 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2659 | |
| 2660 | /* Fix the opcode. */ |
| 2661 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); |
| 2662 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); |
| 2663 | |
| 2664 | /* Fix irel->r_offset and irel->r_addend. */ |
| 2665 | irel->r_offset += 1; |
| 2666 | irel->r_addend += 1; |
| 2667 | |
| 2668 | /* Delete one byte of data. */ |
| 2669 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2670 | irel->r_offset + 1, 1)) |
| 2671 | goto error_return; |
| 2672 | |
| 2673 | /* That will change things, so, we should relax again. |
| 2674 | Note that this is not required, and it may be slow. */ |
| 2675 | *again = TRUE; |
| 2676 | } |
| 2677 | } |
| 2678 | else if (h) |
| 2679 | { |
| 2680 | unsigned char code; |
| 2681 | |
| 2682 | /* Get the opcode. */ |
| 2683 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2684 | |
| 2685 | /* Insert data from the target function into the "call" |
| 2686 | instruction if needed. */ |
| 2687 | if (code == 0xcd) |
| 2688 | { |
| 2689 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); |
| 2690 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, |
| 2691 | contents + irel->r_offset + 3); |
| 2692 | } |
| 2693 | } |
| 2694 | |
| 2695 | /* Deal with pc-relative gunk. */ |
| 2696 | value -= (sec->output_section->vma + sec->output_offset); |
| 2697 | value -= irel->r_offset; |
| 2698 | value += irel->r_addend; |
| 2699 | |
| 2700 | /* See if the value will fit in 8 bits, note the high value is |
| 2701 | 0x7f + 1 as the target will be one bytes closer if we are |
| 2702 | able to relax. */ |
| 2703 | if ((long) value < 0x80 && (long) value > -0x80) |
| 2704 | { |
| 2705 | unsigned char code; |
| 2706 | |
| 2707 | /* Get the opcode. */ |
| 2708 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2709 | |
| 2710 | if (code != 0xcc) |
| 2711 | continue; |
| 2712 | |
| 2713 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2714 | elf_section_data (sec)->relocs = internal_relocs; |
| 2715 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2716 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2717 | |
| 2718 | /* Fix the opcode. */ |
| 2719 | bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); |
| 2720 | |
| 2721 | /* Fix the relocation's type. */ |
| 2722 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2723 | R_MN10300_PCREL8); |
| 2724 | |
| 2725 | /* Delete one byte of data. */ |
| 2726 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2727 | irel->r_offset + 1, 1)) |
| 2728 | goto error_return; |
| 2729 | |
| 2730 | /* That will change things, so, we should relax again. |
| 2731 | Note that this is not required, and it may be slow. */ |
| 2732 | *again = TRUE; |
| 2733 | } |
| 2734 | } |
| 2735 | |
| 2736 | /* Try to eliminate an unconditional 8 bit pc-relative branch |
| 2737 | which immediately follows a conditional 8 bit pc-relative |
| 2738 | branch around the unconditional branch. |
| 2739 | |
| 2740 | original: new: |
| 2741 | bCC lab1 bCC' lab2 |
| 2742 | bra lab2 |
| 2743 | lab1: lab1: |
| 2744 | |
| 2745 | This happens when the bCC can't reach lab2 at assembly time, |
| 2746 | but due to other relaxations it can reach at link time. */ |
| 2747 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) |
| 2748 | { |
| 2749 | Elf_Internal_Rela *nrel; |
| 2750 | bfd_vma value = symval; |
| 2751 | unsigned char code; |
| 2752 | |
| 2753 | /* Deal with pc-relative gunk. */ |
| 2754 | value -= (sec->output_section->vma + sec->output_offset); |
| 2755 | value -= irel->r_offset; |
| 2756 | value += irel->r_addend; |
| 2757 | |
| 2758 | /* Do nothing if this reloc is the last byte in the section. */ |
| 2759 | if (irel->r_offset == sec->_cooked_size) |
| 2760 | continue; |
| 2761 | |
| 2762 | /* See if the next instruction is an unconditional pc-relative |
| 2763 | branch, more often than not this test will fail, so we |
| 2764 | test it first to speed things up. */ |
| 2765 | code = bfd_get_8 (abfd, contents + irel->r_offset + 1); |
| 2766 | if (code != 0xca) |
| 2767 | continue; |
| 2768 | |
| 2769 | /* Also make sure the next relocation applies to the next |
| 2770 | instruction and that it's a pc-relative 8 bit branch. */ |
| 2771 | nrel = irel + 1; |
| 2772 | if (nrel == irelend |
| 2773 | || irel->r_offset + 2 != nrel->r_offset |
| 2774 | || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) |
| 2775 | continue; |
| 2776 | |
| 2777 | /* Make sure our destination immediately follows the |
| 2778 | unconditional branch. */ |
| 2779 | if (symval != (sec->output_section->vma + sec->output_offset |
| 2780 | + irel->r_offset + 3)) |
| 2781 | continue; |
| 2782 | |
| 2783 | /* Now make sure we are a conditional branch. This may not |
| 2784 | be necessary, but why take the chance. |
| 2785 | |
| 2786 | Note these checks assume that R_MN10300_PCREL8 relocs |
| 2787 | only occur on bCC and bCCx insns. If they occured |
| 2788 | elsewhere, we'd need to know the start of this insn |
| 2789 | for this check to be accurate. */ |
| 2790 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2791 | if (code != 0xc0 && code != 0xc1 && code != 0xc2 |
| 2792 | && code != 0xc3 && code != 0xc4 && code != 0xc5 |
| 2793 | && code != 0xc6 && code != 0xc7 && code != 0xc8 |
| 2794 | && code != 0xc9 && code != 0xe8 && code != 0xe9 |
| 2795 | && code != 0xea && code != 0xeb) |
| 2796 | continue; |
| 2797 | |
| 2798 | /* We also have to be sure there is no symbol/label |
| 2799 | at the unconditional branch. */ |
| 2800 | if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf, |
| 2801 | irel->r_offset + 1)) |
| 2802 | continue; |
| 2803 | |
| 2804 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2805 | elf_section_data (sec)->relocs = internal_relocs; |
| 2806 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2807 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2808 | |
| 2809 | /* Reverse the condition of the first branch. */ |
| 2810 | switch (code) |
| 2811 | { |
| 2812 | case 0xc8: |
| 2813 | code = 0xc9; |
| 2814 | break; |
| 2815 | case 0xc9: |
| 2816 | code = 0xc8; |
| 2817 | break; |
| 2818 | case 0xc0: |
| 2819 | code = 0xc2; |
| 2820 | break; |
| 2821 | case 0xc2: |
| 2822 | code = 0xc0; |
| 2823 | break; |
| 2824 | case 0xc3: |
| 2825 | code = 0xc1; |
| 2826 | break; |
| 2827 | case 0xc1: |
| 2828 | code = 0xc3; |
| 2829 | break; |
| 2830 | case 0xc4: |
| 2831 | code = 0xc6; |
| 2832 | break; |
| 2833 | case 0xc6: |
| 2834 | code = 0xc4; |
| 2835 | break; |
| 2836 | case 0xc7: |
| 2837 | code = 0xc5; |
| 2838 | break; |
| 2839 | case 0xc5: |
| 2840 | code = 0xc7; |
| 2841 | break; |
| 2842 | case 0xe8: |
| 2843 | code = 0xe9; |
| 2844 | break; |
| 2845 | case 0x9d: |
| 2846 | code = 0xe8; |
| 2847 | break; |
| 2848 | case 0xea: |
| 2849 | code = 0xeb; |
| 2850 | break; |
| 2851 | case 0xeb: |
| 2852 | code = 0xea; |
| 2853 | break; |
| 2854 | } |
| 2855 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 2856 | |
| 2857 | /* Set the reloc type and symbol for the first branch |
| 2858 | from the second branch. */ |
| 2859 | irel->r_info = nrel->r_info; |
| 2860 | |
| 2861 | /* Make the reloc for the second branch a null reloc. */ |
| 2862 | nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), |
| 2863 | R_MN10300_NONE); |
| 2864 | |
| 2865 | /* Delete two bytes of data. */ |
| 2866 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2867 | irel->r_offset + 1, 2)) |
| 2868 | goto error_return; |
| 2869 | |
| 2870 | /* That will change things, so, we should relax again. |
| 2871 | Note that this is not required, and it may be slow. */ |
| 2872 | *again = TRUE; |
| 2873 | } |
| 2874 | |
| 2875 | /* Try to turn a 24 immediate, displacement or absolute address |
| 2876 | into a 8 immediate, displacement or absolute address. */ |
| 2877 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) |
| 2878 | { |
| 2879 | bfd_vma value = symval; |
| 2880 | value += irel->r_addend; |
| 2881 | |
| 2882 | /* See if the value will fit in 8 bits. */ |
| 2883 | if ((long) value < 0x7f && (long) value > -0x80) |
| 2884 | { |
| 2885 | unsigned char code; |
| 2886 | |
| 2887 | /* AM33 insns which have 24 operands are 6 bytes long and |
| 2888 | will have 0xfd as the first byte. */ |
| 2889 | |
| 2890 | /* Get the first opcode. */ |
| 2891 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); |
| 2892 | |
| 2893 | if (code == 0xfd) |
| 2894 | { |
| 2895 | /* Get the second opcode. */ |
| 2896 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 2897 | |
| 2898 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit |
| 2899 | equivalent instructions exists. */ |
| 2900 | if (code != 0x6b && code != 0x7b |
| 2901 | && code != 0x8b && code != 0x9b |
| 2902 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 |
| 2903 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b |
| 2904 | || (code & 0x0f) == 0x0e)) |
| 2905 | { |
| 2906 | /* Not safe if the high bit is on as relaxing may |
| 2907 | move the value out of high mem and thus not fit |
| 2908 | in a signed 8bit value. This is currently over |
| 2909 | conservative. */ |
| 2910 | if ((value & 0x80) == 0) |
| 2911 | { |
| 2912 | /* Note that we've changed the relocation contents, |
| 2913 | etc. */ |
| 2914 | elf_section_data (sec)->relocs = internal_relocs; |
| 2915 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2916 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2917 | |
| 2918 | /* Fix the opcode. */ |
| 2919 | bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); |
| 2920 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 2921 | |
| 2922 | /* Fix the relocation's type. */ |
| 2923 | irel->r_info = |
| 2924 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2925 | R_MN10300_8); |
| 2926 | |
| 2927 | /* Delete two bytes of data. */ |
| 2928 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2929 | irel->r_offset + 1, 2)) |
| 2930 | goto error_return; |
| 2931 | |
| 2932 | /* That will change things, so, we should relax |
| 2933 | again. Note that this is not required, and it |
| 2934 | may be slow. */ |
| 2935 | *again = TRUE; |
| 2936 | break; |
| 2937 | } |
| 2938 | } |
| 2939 | } |
| 2940 | } |
| 2941 | } |
| 2942 | |
| 2943 | /* Try to turn a 32bit immediate, displacement or absolute address |
| 2944 | into a 16bit immediate, displacement or absolute address. */ |
| 2945 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32 |
| 2946 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32 |
| 2947 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32 |
| 2948 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32) |
| 2949 | { |
| 2950 | bfd_vma value = symval; |
| 2951 | |
| 2952 | if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32) |
| 2953 | { |
| 2954 | asection * sgot; |
| 2955 | |
| 2956 | sgot = bfd_get_section_by_name (elf_hash_table (link_info) |
| 2957 | ->dynobj, ".got"); |
| 2958 | |
| 2959 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32) |
| 2960 | { |
| 2961 | value = sgot->output_offset; |
| 2962 | |
| 2963 | if (h) |
| 2964 | value += h->root.got.offset; |
| 2965 | else |
| 2966 | value += (elf_local_got_offsets |
| 2967 | (abfd)[ELF32_R_SYM (irel->r_info)]); |
| 2968 | } |
| 2969 | else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32) |
| 2970 | value -= sgot->output_section->vma; |
| 2971 | else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32) |
| 2972 | value = (sgot->output_section->vma |
| 2973 | - (sec->output_section->vma |
| 2974 | + sec->output_offset |
| 2975 | + irel->r_offset)); |
| 2976 | else |
| 2977 | abort (); |
| 2978 | } |
| 2979 | |
| 2980 | value += irel->r_addend; |
| 2981 | |
| 2982 | /* See if the value will fit in 24 bits. |
| 2983 | We allow any 16bit match here. We prune those we can't |
| 2984 | handle below. */ |
| 2985 | if ((long) value < 0x7fffff && (long) value > -0x800000) |
| 2986 | { |
| 2987 | unsigned char code; |
| 2988 | |
| 2989 | /* AM33 insns which have 32bit operands are 7 bytes long and |
| 2990 | will have 0xfe as the first byte. */ |
| 2991 | |
| 2992 | /* Get the first opcode. */ |
| 2993 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); |
| 2994 | |
| 2995 | if (code == 0xfe) |
| 2996 | { |
| 2997 | /* Get the second opcode. */ |
| 2998 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 2999 | |
| 3000 | /* All the am33 32 -> 24 relaxing possibilities. */ |
| 3001 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit |
| 3002 | equivalent instructions exists. */ |
| 3003 | if (code != 0x6b && code != 0x7b |
| 3004 | && code != 0x8b && code != 0x9b |
| 3005 | && (ELF32_R_TYPE (irel->r_info) |
| 3006 | != (int) R_MN10300_GOTPC32) |
| 3007 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 |
| 3008 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b |
| 3009 | || (code & 0x0f) == 0x0e)) |
| 3010 | { |
| 3011 | /* Not safe if the high bit is on as relaxing may |
| 3012 | move the value out of high mem and thus not fit |
| 3013 | in a signed 16bit value. This is currently over |
| 3014 | conservative. */ |
| 3015 | if ((value & 0x8000) == 0) |
| 3016 | { |
| 3017 | /* Note that we've changed the relocation contents, |
| 3018 | etc. */ |
| 3019 | elf_section_data (sec)->relocs = internal_relocs; |
| 3020 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3021 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3022 | |
| 3023 | /* Fix the opcode. */ |
| 3024 | bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); |
| 3025 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 3026 | |
| 3027 | /* Fix the relocation's type. */ |
| 3028 | irel->r_info = |
| 3029 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3030 | (ELF32_R_TYPE (irel->r_info) |
| 3031 | == (int) R_MN10300_GOTOFF32) |
| 3032 | ? R_MN10300_GOTOFF24 |
| 3033 | : (ELF32_R_TYPE (irel->r_info) |
| 3034 | == (int) R_MN10300_GOT32) |
| 3035 | ? R_MN10300_GOT24 : |
| 3036 | R_MN10300_24); |
| 3037 | |
| 3038 | /* Delete one byte of data. */ |
| 3039 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3040 | irel->r_offset + 3, 1)) |
| 3041 | goto error_return; |
| 3042 | |
| 3043 | /* That will change things, so, we should relax |
| 3044 | again. Note that this is not required, and it |
| 3045 | may be slow. */ |
| 3046 | *again = TRUE; |
| 3047 | break; |
| 3048 | } |
| 3049 | } |
| 3050 | } |
| 3051 | } |
| 3052 | |
| 3053 | /* See if the value will fit in 16 bits. |
| 3054 | We allow any 16bit match here. We prune those we can't |
| 3055 | handle below. */ |
| 3056 | if ((long) value < 0x7fff && (long) value > -0x8000) |
| 3057 | { |
| 3058 | unsigned char code; |
| 3059 | |
| 3060 | /* Most insns which have 32bit operands are 6 bytes long; |
| 3061 | exceptions are pcrel insns and bit insns. |
| 3062 | |
| 3063 | We handle pcrel insns above. We don't bother trying |
| 3064 | to handle the bit insns here. |
| 3065 | |
| 3066 | The first byte of the remaining insns will be 0xfc. */ |
| 3067 | |
| 3068 | /* Get the first opcode. */ |
| 3069 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 3070 | |
| 3071 | if (code != 0xfc) |
| 3072 | continue; |
| 3073 | |
| 3074 | /* Get the second opcode. */ |
| 3075 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3076 | |
| 3077 | if ((code & 0xf0) < 0x80) |
| 3078 | switch (code & 0xf0) |
| 3079 | { |
| 3080 | /* mov (d32,am),dn -> mov (d32,am),dn |
| 3081 | mov dm,(d32,am) -> mov dn,(d32,am) |
| 3082 | mov (d32,am),an -> mov (d32,am),an |
| 3083 | mov dm,(d32,am) -> mov dn,(d32,am) |
| 3084 | movbu (d32,am),dn -> movbu (d32,am),dn |
| 3085 | movbu dm,(d32,am) -> movbu dn,(d32,am) |
| 3086 | movhu (d32,am),dn -> movhu (d32,am),dn |
| 3087 | movhu dm,(d32,am) -> movhu dn,(d32,am) */ |
| 3088 | case 0x00: |
| 3089 | case 0x10: |
| 3090 | case 0x20: |
| 3091 | case 0x30: |
| 3092 | case 0x40: |
| 3093 | case 0x50: |
| 3094 | case 0x60: |
| 3095 | case 0x70: |
| 3096 | /* Not safe if the high bit is on as relaxing may |
| 3097 | move the value out of high mem and thus not fit |
| 3098 | in a signed 16bit value. */ |
| 3099 | if (code == 0xcc |
| 3100 | && (value & 0x8000)) |
| 3101 | continue; |
| 3102 | |
| 3103 | /* Note that we've changed the relocation contents, etc. */ |
| 3104 | elf_section_data (sec)->relocs = internal_relocs; |
| 3105 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3106 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3107 | |
| 3108 | /* Fix the opcode. */ |
| 3109 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 3110 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 3111 | |
| 3112 | /* Fix the relocation's type. */ |
| 3113 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3114 | (ELF32_R_TYPE (irel->r_info) |
| 3115 | == (int) R_MN10300_GOTOFF32) |
| 3116 | ? R_MN10300_GOTOFF16 |
| 3117 | : (ELF32_R_TYPE (irel->r_info) |
| 3118 | == (int) R_MN10300_GOT32) |
| 3119 | ? R_MN10300_GOT16 |
| 3120 | : (ELF32_R_TYPE (irel->r_info) |
| 3121 | == (int) R_MN10300_GOTPC32) |
| 3122 | ? R_MN10300_GOTPC16 : |
| 3123 | R_MN10300_16); |
| 3124 | |
| 3125 | /* Delete two bytes of data. */ |
| 3126 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3127 | irel->r_offset + 2, 2)) |
| 3128 | goto error_return; |
| 3129 | |
| 3130 | /* That will change things, so, we should relax again. |
| 3131 | Note that this is not required, and it may be slow. */ |
| 3132 | *again = TRUE; |
| 3133 | break; |
| 3134 | } |
| 3135 | else if ((code & 0xf0) == 0x80 |
| 3136 | || (code & 0xf0) == 0x90) |
| 3137 | switch (code & 0xf3) |
| 3138 | { |
| 3139 | /* mov dn,(abs32) -> mov dn,(abs16) |
| 3140 | movbu dn,(abs32) -> movbu dn,(abs16) |
| 3141 | movhu dn,(abs32) -> movhu dn,(abs16) */ |
| 3142 | case 0x81: |
| 3143 | case 0x82: |
| 3144 | case 0x83: |
| 3145 | /* Note that we've changed the relocation contents, etc. */ |
| 3146 | elf_section_data (sec)->relocs = internal_relocs; |
| 3147 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3148 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3149 | |
| 3150 | if ((code & 0xf3) == 0x81) |
| 3151 | code = 0x01 + (code & 0x0c); |
| 3152 | else if ((code & 0xf3) == 0x82) |
| 3153 | code = 0x02 + (code & 0x0c); |
| 3154 | else if ((code & 0xf3) == 0x83) |
| 3155 | code = 0x03 + (code & 0x0c); |
| 3156 | else |
| 3157 | abort (); |
| 3158 | |
| 3159 | /* Fix the opcode. */ |
| 3160 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 3161 | |
| 3162 | /* Fix the relocation's type. */ |
| 3163 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3164 | (ELF32_R_TYPE (irel->r_info) |
| 3165 | == (int) R_MN10300_GOTOFF32) |
| 3166 | ? R_MN10300_GOTOFF16 |
| 3167 | : (ELF32_R_TYPE (irel->r_info) |
| 3168 | == (int) R_MN10300_GOT32) |
| 3169 | ? R_MN10300_GOT16 |
| 3170 | : (ELF32_R_TYPE (irel->r_info) |
| 3171 | == (int) R_MN10300_GOTPC32) |
| 3172 | ? R_MN10300_GOTPC16 : |
| 3173 | R_MN10300_16); |
| 3174 | |
| 3175 | /* The opcode got shorter too, so we have to fix the |
| 3176 | addend and offset too! */ |
| 3177 | irel->r_offset -= 1; |
| 3178 | |
| 3179 | /* Delete three bytes of data. */ |
| 3180 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3181 | irel->r_offset + 1, 3)) |
| 3182 | goto error_return; |
| 3183 | |
| 3184 | /* That will change things, so, we should relax again. |
| 3185 | Note that this is not required, and it may be slow. */ |
| 3186 | *again = TRUE; |
| 3187 | break; |
| 3188 | |
| 3189 | /* mov am,(abs32) -> mov am,(abs16) |
| 3190 | mov am,(d32,sp) -> mov am,(d16,sp) |
| 3191 | mov dm,(d32,sp) -> mov dm,(d32,sp) |
| 3192 | movbu dm,(d32,sp) -> movbu dm,(d32,sp) |
| 3193 | movhu dm,(d32,sp) -> movhu dm,(d32,sp) */ |
| 3194 | case 0x80: |
| 3195 | case 0x90: |
| 3196 | case 0x91: |
| 3197 | case 0x92: |
| 3198 | case 0x93: |
| 3199 | /* sp-based offsets are zero-extended. */ |
| 3200 | if (code >= 0x90 && code <= 0x93 |
| 3201 | && (long)value < 0) |
| 3202 | continue; |
| 3203 | |
| 3204 | /* Note that we've changed the relocation contents, etc. */ |
| 3205 | elf_section_data (sec)->relocs = internal_relocs; |
| 3206 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3207 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3208 | |
| 3209 | /* Fix the opcode. */ |
| 3210 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 3211 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 3212 | |
| 3213 | /* Fix the relocation's type. */ |
| 3214 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3215 | (ELF32_R_TYPE (irel->r_info) |
| 3216 | == (int) R_MN10300_GOTOFF32) |
| 3217 | ? R_MN10300_GOTOFF16 |
| 3218 | : (ELF32_R_TYPE (irel->r_info) |
| 3219 | == (int) R_MN10300_GOT32) |
| 3220 | ? R_MN10300_GOT16 |
| 3221 | : (ELF32_R_TYPE (irel->r_info) |
| 3222 | == (int) R_MN10300_GOTPC32) |
| 3223 | ? R_MN10300_GOTPC16 : |
| 3224 | R_MN10300_16); |
| 3225 | |
| 3226 | /* Delete two bytes of data. */ |
| 3227 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3228 | irel->r_offset + 2, 2)) |
| 3229 | goto error_return; |
| 3230 | |
| 3231 | /* That will change things, so, we should relax again. |
| 3232 | Note that this is not required, and it may be slow. */ |
| 3233 | *again = TRUE; |
| 3234 | break; |
| 3235 | } |
| 3236 | else if ((code & 0xf0) < 0xf0) |
| 3237 | switch (code & 0xfc) |
| 3238 | { |
| 3239 | /* mov imm32,dn -> mov imm16,dn |
| 3240 | mov imm32,an -> mov imm16,an |
| 3241 | mov (abs32),dn -> mov (abs16),dn |
| 3242 | movbu (abs32),dn -> movbu (abs16),dn |
| 3243 | movhu (abs32),dn -> movhu (abs16),dn */ |
| 3244 | case 0xcc: |
| 3245 | case 0xdc: |
| 3246 | case 0xa4: |
| 3247 | case 0xa8: |
| 3248 | case 0xac: |
| 3249 | /* Not safe if the high bit is on as relaxing may |
| 3250 | move the value out of high mem and thus not fit |
| 3251 | in a signed 16bit value. */ |
| 3252 | if (code == 0xcc |
| 3253 | && (value & 0x8000)) |
| 3254 | continue; |
| 3255 | |
| 3256 | /* mov imm16, an zero-extends the immediate. */ |
| 3257 | if (code == 0xdc |
| 3258 | && (long)value < 0) |
| 3259 | continue; |
| 3260 | |
| 3261 | /* Note that we've changed the relocation contents, etc. */ |
| 3262 | elf_section_data (sec)->relocs = internal_relocs; |
| 3263 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3264 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3265 | |
| 3266 | if ((code & 0xfc) == 0xcc) |
| 3267 | code = 0x2c + (code & 0x03); |
| 3268 | else if ((code & 0xfc) == 0xdc) |
| 3269 | code = 0x24 + (code & 0x03); |
| 3270 | else if ((code & 0xfc) == 0xa4) |
| 3271 | code = 0x30 + (code & 0x03); |
| 3272 | else if ((code & 0xfc) == 0xa8) |
| 3273 | code = 0x34 + (code & 0x03); |
| 3274 | else if ((code & 0xfc) == 0xac) |
| 3275 | code = 0x38 + (code & 0x03); |
| 3276 | else |
| 3277 | abort (); |
| 3278 | |
| 3279 | /* Fix the opcode. */ |
| 3280 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 3281 | |
| 3282 | /* Fix the relocation's type. */ |
| 3283 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3284 | (ELF32_R_TYPE (irel->r_info) |
| 3285 | == (int) R_MN10300_GOTOFF32) |
| 3286 | ? R_MN10300_GOTOFF16 |
| 3287 | : (ELF32_R_TYPE (irel->r_info) |
| 3288 | == (int) R_MN10300_GOT32) |
| 3289 | ? R_MN10300_GOT16 |
| 3290 | : (ELF32_R_TYPE (irel->r_info) |
| 3291 | == (int) R_MN10300_GOTPC32) |
| 3292 | ? R_MN10300_GOTPC16 : |
| 3293 | R_MN10300_16); |
| 3294 | |
| 3295 | /* The opcode got shorter too, so we have to fix the |
| 3296 | addend and offset too! */ |
| 3297 | irel->r_offset -= 1; |
| 3298 | |
| 3299 | /* Delete three bytes of data. */ |
| 3300 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3301 | irel->r_offset + 1, 3)) |
| 3302 | goto error_return; |
| 3303 | |
| 3304 | /* That will change things, so, we should relax again. |
| 3305 | Note that this is not required, and it may be slow. */ |
| 3306 | *again = TRUE; |
| 3307 | break; |
| 3308 | |
| 3309 | /* mov (abs32),an -> mov (abs16),an |
| 3310 | mov (d32,sp),an -> mov (d16,sp),an |
| 3311 | mov (d32,sp),dn -> mov (d16,sp),dn |
| 3312 | movbu (d32,sp),dn -> movbu (d16,sp),dn |
| 3313 | movhu (d32,sp),dn -> movhu (d16,sp),dn |
| 3314 | add imm32,dn -> add imm16,dn |
| 3315 | cmp imm32,dn -> cmp imm16,dn |
| 3316 | add imm32,an -> add imm16,an |
| 3317 | cmp imm32,an -> cmp imm16,an |
| 3318 | and imm32,dn -> and imm16,dn |
| 3319 | or imm32,dn -> or imm16,dn |
| 3320 | xor imm32,dn -> xor imm16,dn |
| 3321 | btst imm32,dn -> btst imm16,dn */ |
| 3322 | |
| 3323 | case 0xa0: |
| 3324 | case 0xb0: |
| 3325 | case 0xb1: |
| 3326 | case 0xb2: |
| 3327 | case 0xb3: |
| 3328 | case 0xc0: |
| 3329 | case 0xc8: |
| 3330 | |
| 3331 | case 0xd0: |
| 3332 | case 0xd8: |
| 3333 | case 0xe0: |
| 3334 | case 0xe1: |
| 3335 | case 0xe2: |
| 3336 | case 0xe3: |
| 3337 | /* cmp imm16, an zero-extends the immediate. */ |
| 3338 | if (code == 0xdc |
| 3339 | && (long)value < 0) |
| 3340 | continue; |
| 3341 | |
| 3342 | /* So do sp-based offsets. */ |
| 3343 | if (code >= 0xb0 && code <= 0xb3 |
| 3344 | && (long)value < 0) |
| 3345 | continue; |
| 3346 | |
| 3347 | /* Note that we've changed the relocation contents, etc. */ |
| 3348 | elf_section_data (sec)->relocs = internal_relocs; |
| 3349 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3350 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3351 | |
| 3352 | /* Fix the opcode. */ |
| 3353 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 3354 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 3355 | |
| 3356 | /* Fix the relocation's type. */ |
| 3357 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3358 | (ELF32_R_TYPE (irel->r_info) |
| 3359 | == (int) R_MN10300_GOTOFF32) |
| 3360 | ? R_MN10300_GOTOFF16 |
| 3361 | : (ELF32_R_TYPE (irel->r_info) |
| 3362 | == (int) R_MN10300_GOT32) |
| 3363 | ? R_MN10300_GOT16 |
| 3364 | : (ELF32_R_TYPE (irel->r_info) |
| 3365 | == (int) R_MN10300_GOTPC32) |
| 3366 | ? R_MN10300_GOTPC16 : |
| 3367 | R_MN10300_16); |
| 3368 | |
| 3369 | /* Delete two bytes of data. */ |
| 3370 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3371 | irel->r_offset + 2, 2)) |
| 3372 | goto error_return; |
| 3373 | |
| 3374 | /* That will change things, so, we should relax again. |
| 3375 | Note that this is not required, and it may be slow. */ |
| 3376 | *again = TRUE; |
| 3377 | break; |
| 3378 | } |
| 3379 | else if (code == 0xfe) |
| 3380 | { |
| 3381 | /* add imm32,sp -> add imm16,sp */ |
| 3382 | |
| 3383 | /* Note that we've changed the relocation contents, etc. */ |
| 3384 | elf_section_data (sec)->relocs = internal_relocs; |
| 3385 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3386 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3387 | |
| 3388 | /* Fix the opcode. */ |
| 3389 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 3390 | bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1); |
| 3391 | |
| 3392 | /* Fix the relocation's type. */ |
| 3393 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3394 | (ELF32_R_TYPE (irel->r_info) |
| 3395 | == (int) R_MN10300_GOT32) |
| 3396 | ? R_MN10300_GOT16 |
| 3397 | : (ELF32_R_TYPE (irel->r_info) |
| 3398 | == (int) R_MN10300_GOTOFF32) |
| 3399 | ? R_MN10300_GOTOFF16 |
| 3400 | : (ELF32_R_TYPE (irel->r_info) |
| 3401 | == (int) R_MN10300_GOTPC32) |
| 3402 | ? R_MN10300_GOTPC16 : |
| 3403 | R_MN10300_16); |
| 3404 | |
| 3405 | /* Delete two bytes of data. */ |
| 3406 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3407 | irel->r_offset + 2, 2)) |
| 3408 | goto error_return; |
| 3409 | |
| 3410 | /* That will change things, so, we should relax again. |
| 3411 | Note that this is not required, and it may be slow. */ |
| 3412 | *again = TRUE; |
| 3413 | break; |
| 3414 | } |
| 3415 | } |
| 3416 | } |
| 3417 | } |
| 3418 | |
| 3419 | if (isymbuf != NULL |
| 3420 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3421 | { |
| 3422 | if (! link_info->keep_memory) |
| 3423 | free (isymbuf); |
| 3424 | else |
| 3425 | { |
| 3426 | /* Cache the symbols for elf_link_input_bfd. */ |
| 3427 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3428 | } |
| 3429 | } |
| 3430 | |
| 3431 | if (contents != NULL |
| 3432 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 3433 | { |
| 3434 | if (! link_info->keep_memory) |
| 3435 | free (contents); |
| 3436 | else |
| 3437 | { |
| 3438 | /* Cache the section contents for elf_link_input_bfd. */ |
| 3439 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3440 | } |
| 3441 | } |
| 3442 | |
| 3443 | if (internal_relocs != NULL |
| 3444 | && elf_section_data (sec)->relocs != internal_relocs) |
| 3445 | free (internal_relocs); |
| 3446 | |
| 3447 | return TRUE; |
| 3448 | |
| 3449 | error_return: |
| 3450 | if (isymbuf != NULL |
| 3451 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3452 | free (isymbuf); |
| 3453 | if (contents != NULL |
| 3454 | && elf_section_data (section)->this_hdr.contents != contents) |
| 3455 | free (contents); |
| 3456 | if (internal_relocs != NULL |
| 3457 | && elf_section_data (section)->relocs != internal_relocs) |
| 3458 | free (internal_relocs); |
| 3459 | |
| 3460 | return FALSE; |
| 3461 | } |
| 3462 | |
| 3463 | /* Compute the stack size and movm arguments for the function |
| 3464 | referred to by HASH at address ADDR in section with |
| 3465 | contents CONTENTS, store the information in the hash table. */ |
| 3466 | static void |
| 3467 | compute_function_info (abfd, hash, addr, contents) |
| 3468 | bfd *abfd; |
| 3469 | struct elf32_mn10300_link_hash_entry *hash; |
| 3470 | bfd_vma addr; |
| 3471 | unsigned char *contents; |
| 3472 | { |
| 3473 | unsigned char byte1, byte2; |
| 3474 | /* We only care about a very small subset of the possible prologue |
| 3475 | sequences here. Basically we look for: |
| 3476 | |
| 3477 | movm [d2,d3,a2,a3],sp (optional) |
| 3478 | add <size>,sp (optional, and only for sizes which fit in an unsigned |
| 3479 | 8 bit number) |
| 3480 | |
| 3481 | If we find anything else, we quit. */ |
| 3482 | |
| 3483 | /* Look for movm [regs],sp */ |
| 3484 | byte1 = bfd_get_8 (abfd, contents + addr); |
| 3485 | byte2 = bfd_get_8 (abfd, contents + addr + 1); |
| 3486 | |
| 3487 | if (byte1 == 0xcf) |
| 3488 | { |
| 3489 | hash->movm_args = byte2; |
| 3490 | addr += 2; |
| 3491 | byte1 = bfd_get_8 (abfd, contents + addr); |
| 3492 | byte2 = bfd_get_8 (abfd, contents + addr + 1); |
| 3493 | } |
| 3494 | |
| 3495 | /* Now figure out how much stack space will be allocated by the movm |
| 3496 | instruction. We need this kept separate from the function's normal |
| 3497 | stack space. */ |
| 3498 | if (hash->movm_args) |
| 3499 | { |
| 3500 | /* Space for d2. */ |
| 3501 | if (hash->movm_args & 0x80) |
| 3502 | hash->movm_stack_size += 4; |
| 3503 | |
| 3504 | /* Space for d3. */ |
| 3505 | if (hash->movm_args & 0x40) |
| 3506 | hash->movm_stack_size += 4; |
| 3507 | |
| 3508 | /* Space for a2. */ |
| 3509 | if (hash->movm_args & 0x20) |
| 3510 | hash->movm_stack_size += 4; |
| 3511 | |
| 3512 | /* Space for a3. */ |
| 3513 | if (hash->movm_args & 0x10) |
| 3514 | hash->movm_stack_size += 4; |
| 3515 | |
| 3516 | /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ |
| 3517 | if (hash->movm_args & 0x08) |
| 3518 | hash->movm_stack_size += 8 * 4; |
| 3519 | |
| 3520 | if (bfd_get_mach (abfd) == bfd_mach_am33 |
| 3521 | || bfd_get_mach (abfd) == bfd_mach_am33_2) |
| 3522 | { |
| 3523 | /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ |
| 3524 | if (hash->movm_args & 0x1) |
| 3525 | hash->movm_stack_size += 6 * 4; |
| 3526 | |
| 3527 | /* exreg1 space. e4, e5, e6, e7 */ |
| 3528 | if (hash->movm_args & 0x2) |
| 3529 | hash->movm_stack_size += 4 * 4; |
| 3530 | |
| 3531 | /* exreg0 space. e2, e3 */ |
| 3532 | if (hash->movm_args & 0x4) |
| 3533 | hash->movm_stack_size += 2 * 4; |
| 3534 | } |
| 3535 | } |
| 3536 | |
| 3537 | /* Now look for the two stack adjustment variants. */ |
| 3538 | if (byte1 == 0xf8 && byte2 == 0xfe) |
| 3539 | { |
| 3540 | int temp = bfd_get_8 (abfd, contents + addr + 2); |
| 3541 | temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; |
| 3542 | |
| 3543 | hash->stack_size = -temp; |
| 3544 | } |
| 3545 | else if (byte1 == 0xfa && byte2 == 0xfe) |
| 3546 | { |
| 3547 | int temp = bfd_get_16 (abfd, contents + addr + 2); |
| 3548 | temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; |
| 3549 | temp = -temp; |
| 3550 | |
| 3551 | if (temp < 255) |
| 3552 | hash->stack_size = temp; |
| 3553 | } |
| 3554 | |
| 3555 | /* If the total stack to be allocated by the call instruction is more |
| 3556 | than 255 bytes, then we can't remove the stack adjustment by using |
| 3557 | "call" (we might still be able to remove the "movm" instruction. */ |
| 3558 | if (hash->stack_size + hash->movm_stack_size > 255) |
| 3559 | hash->stack_size = 0; |
| 3560 | |
| 3561 | return; |
| 3562 | } |
| 3563 | |
| 3564 | /* Delete some bytes from a section while relaxing. */ |
| 3565 | |
| 3566 | static bfd_boolean |
| 3567 | mn10300_elf_relax_delete_bytes (abfd, sec, addr, count) |
| 3568 | bfd *abfd; |
| 3569 | asection *sec; |
| 3570 | bfd_vma addr; |
| 3571 | int count; |
| 3572 | { |
| 3573 | Elf_Internal_Shdr *symtab_hdr; |
| 3574 | unsigned int sec_shndx; |
| 3575 | bfd_byte *contents; |
| 3576 | Elf_Internal_Rela *irel, *irelend; |
| 3577 | Elf_Internal_Rela *irelalign; |
| 3578 | bfd_vma toaddr; |
| 3579 | Elf_Internal_Sym *isym, *isymend; |
| 3580 | struct elf_link_hash_entry **sym_hashes; |
| 3581 | struct elf_link_hash_entry **end_hashes; |
| 3582 | unsigned int symcount; |
| 3583 | |
| 3584 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 3585 | |
| 3586 | contents = elf_section_data (sec)->this_hdr.contents; |
| 3587 | |
| 3588 | /* The deletion must stop at the next ALIGN reloc for an aligment |
| 3589 | power larger than the number of bytes we are deleting. */ |
| 3590 | |
| 3591 | irelalign = NULL; |
| 3592 | toaddr = sec->_cooked_size; |
| 3593 | |
| 3594 | irel = elf_section_data (sec)->relocs; |
| 3595 | irelend = irel + sec->reloc_count; |
| 3596 | |
| 3597 | /* Actually delete the bytes. */ |
| 3598 | memmove (contents + addr, contents + addr + count, |
| 3599 | (size_t) (toaddr - addr - count)); |
| 3600 | sec->_cooked_size -= count; |
| 3601 | |
| 3602 | /* Adjust all the relocs. */ |
| 3603 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 3604 | { |
| 3605 | /* Get the new reloc address. */ |
| 3606 | if ((irel->r_offset > addr |
| 3607 | && irel->r_offset < toaddr)) |
| 3608 | irel->r_offset -= count; |
| 3609 | } |
| 3610 | |
| 3611 | /* Adjust the local symbols defined in this section. */ |
| 3612 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3613 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3614 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 3615 | { |
| 3616 | if (isym->st_shndx == sec_shndx |
| 3617 | && isym->st_value > addr |
| 3618 | && isym->st_value < toaddr) |
| 3619 | isym->st_value -= count; |
| 3620 | } |
| 3621 | |
| 3622 | /* Now adjust the global symbols defined in this section. */ |
| 3623 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 3624 | - symtab_hdr->sh_info); |
| 3625 | sym_hashes = elf_sym_hashes (abfd); |
| 3626 | end_hashes = sym_hashes + symcount; |
| 3627 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 3628 | { |
| 3629 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 3630 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 3631 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 3632 | && sym_hash->root.u.def.section == sec |
| 3633 | && sym_hash->root.u.def.value > addr |
| 3634 | && sym_hash->root.u.def.value < toaddr) |
| 3635 | { |
| 3636 | sym_hash->root.u.def.value -= count; |
| 3637 | } |
| 3638 | } |
| 3639 | |
| 3640 | return TRUE; |
| 3641 | } |
| 3642 | |
| 3643 | /* Return TRUE if a symbol exists at the given address, else return |
| 3644 | FALSE. */ |
| 3645 | static bfd_boolean |
| 3646 | mn10300_elf_symbol_address_p (abfd, sec, isym, addr) |
| 3647 | bfd *abfd; |
| 3648 | asection *sec; |
| 3649 | Elf_Internal_Sym *isym; |
| 3650 | bfd_vma addr; |
| 3651 | { |
| 3652 | Elf_Internal_Shdr *symtab_hdr; |
| 3653 | unsigned int sec_shndx; |
| 3654 | Elf_Internal_Sym *isymend; |
| 3655 | struct elf_link_hash_entry **sym_hashes; |
| 3656 | struct elf_link_hash_entry **end_hashes; |
| 3657 | unsigned int symcount; |
| 3658 | |
| 3659 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 3660 | |
| 3661 | /* Examine all the symbols. */ |
| 3662 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3663 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 3664 | { |
| 3665 | if (isym->st_shndx == sec_shndx |
| 3666 | && isym->st_value == addr) |
| 3667 | return TRUE; |
| 3668 | } |
| 3669 | |
| 3670 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 3671 | - symtab_hdr->sh_info); |
| 3672 | sym_hashes = elf_sym_hashes (abfd); |
| 3673 | end_hashes = sym_hashes + symcount; |
| 3674 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 3675 | { |
| 3676 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 3677 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 3678 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 3679 | && sym_hash->root.u.def.section == sec |
| 3680 | && sym_hash->root.u.def.value == addr) |
| 3681 | return TRUE; |
| 3682 | } |
| 3683 | |
| 3684 | return FALSE; |
| 3685 | } |
| 3686 | |
| 3687 | /* This is a version of bfd_generic_get_relocated_section_contents |
| 3688 | which uses mn10300_elf_relocate_section. */ |
| 3689 | |
| 3690 | static bfd_byte * |
| 3691 | mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order, |
| 3692 | data, relocatable, symbols) |
| 3693 | bfd *output_bfd; |
| 3694 | struct bfd_link_info *link_info; |
| 3695 | struct bfd_link_order *link_order; |
| 3696 | bfd_byte *data; |
| 3697 | bfd_boolean relocatable; |
| 3698 | asymbol **symbols; |
| 3699 | { |
| 3700 | Elf_Internal_Shdr *symtab_hdr; |
| 3701 | asection *input_section = link_order->u.indirect.section; |
| 3702 | bfd *input_bfd = input_section->owner; |
| 3703 | asection **sections = NULL; |
| 3704 | Elf_Internal_Rela *internal_relocs = NULL; |
| 3705 | Elf_Internal_Sym *isymbuf = NULL; |
| 3706 | |
| 3707 | /* We only need to handle the case of relaxing, or of having a |
| 3708 | particular set of section contents, specially. */ |
| 3709 | if (relocatable |
| 3710 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
| 3711 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| 3712 | link_order, data, |
| 3713 | relocatable, |
| 3714 | symbols); |
| 3715 | |
| 3716 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3717 | |
| 3718 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| 3719 | (size_t) input_section->_raw_size); |
| 3720 | |
| 3721 | if ((input_section->flags & SEC_RELOC) != 0 |
| 3722 | && input_section->reloc_count > 0) |
| 3723 | { |
| 3724 | asection **secpp; |
| 3725 | Elf_Internal_Sym *isym, *isymend; |
| 3726 | bfd_size_type amt; |
| 3727 | |
| 3728 | internal_relocs = (_bfd_elf_link_read_relocs |
| 3729 | (input_bfd, input_section, (PTR) NULL, |
| 3730 | (Elf_Internal_Rela *) NULL, FALSE)); |
| 3731 | if (internal_relocs == NULL) |
| 3732 | goto error_return; |
| 3733 | |
| 3734 | if (symtab_hdr->sh_info != 0) |
| 3735 | { |
| 3736 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3737 | if (isymbuf == NULL) |
| 3738 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 3739 | symtab_hdr->sh_info, 0, |
| 3740 | NULL, NULL, NULL); |
| 3741 | if (isymbuf == NULL) |
| 3742 | goto error_return; |
| 3743 | } |
| 3744 | |
| 3745 | amt = symtab_hdr->sh_info; |
| 3746 | amt *= sizeof (asection *); |
| 3747 | sections = (asection **) bfd_malloc (amt); |
| 3748 | if (sections == NULL && amt != 0) |
| 3749 | goto error_return; |
| 3750 | |
| 3751 | isymend = isymbuf + symtab_hdr->sh_info; |
| 3752 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
| 3753 | { |
| 3754 | asection *isec; |
| 3755 | |
| 3756 | if (isym->st_shndx == SHN_UNDEF) |
| 3757 | isec = bfd_und_section_ptr; |
| 3758 | else if (isym->st_shndx == SHN_ABS) |
| 3759 | isec = bfd_abs_section_ptr; |
| 3760 | else if (isym->st_shndx == SHN_COMMON) |
| 3761 | isec = bfd_com_section_ptr; |
| 3762 | else |
| 3763 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 3764 | |
| 3765 | *secpp = isec; |
| 3766 | } |
| 3767 | |
| 3768 | if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd, |
| 3769 | input_section, data, internal_relocs, |
| 3770 | isymbuf, sections)) |
| 3771 | goto error_return; |
| 3772 | |
| 3773 | if (sections != NULL) |
| 3774 | free (sections); |
| 3775 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3776 | free (isymbuf); |
| 3777 | if (internal_relocs != elf_section_data (input_section)->relocs) |
| 3778 | free (internal_relocs); |
| 3779 | } |
| 3780 | |
| 3781 | return data; |
| 3782 | |
| 3783 | error_return: |
| 3784 | if (sections != NULL) |
| 3785 | free (sections); |
| 3786 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3787 | free (isymbuf); |
| 3788 | if (internal_relocs != NULL |
| 3789 | && internal_relocs != elf_section_data (input_section)->relocs) |
| 3790 | free (internal_relocs); |
| 3791 | return NULL; |
| 3792 | } |
| 3793 | |
| 3794 | /* Assorted hash table functions. */ |
| 3795 | |
| 3796 | /* Initialize an entry in the link hash table. */ |
| 3797 | |
| 3798 | /* Create an entry in an MN10300 ELF linker hash table. */ |
| 3799 | |
| 3800 | static struct bfd_hash_entry * |
| 3801 | elf32_mn10300_link_hash_newfunc (entry, table, string) |
| 3802 | struct bfd_hash_entry *entry; |
| 3803 | struct bfd_hash_table *table; |
| 3804 | const char *string; |
| 3805 | { |
| 3806 | struct elf32_mn10300_link_hash_entry *ret = |
| 3807 | (struct elf32_mn10300_link_hash_entry *) entry; |
| 3808 | |
| 3809 | /* Allocate the structure if it has not already been allocated by a |
| 3810 | subclass. */ |
| 3811 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) |
| 3812 | ret = ((struct elf32_mn10300_link_hash_entry *) |
| 3813 | bfd_hash_allocate (table, |
| 3814 | sizeof (struct elf32_mn10300_link_hash_entry))); |
| 3815 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) |
| 3816 | return (struct bfd_hash_entry *) ret; |
| 3817 | |
| 3818 | /* Call the allocation method of the superclass. */ |
| 3819 | ret = ((struct elf32_mn10300_link_hash_entry *) |
| 3820 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 3821 | table, string)); |
| 3822 | if (ret != (struct elf32_mn10300_link_hash_entry *) NULL) |
| 3823 | { |
| 3824 | ret->direct_calls = 0; |
| 3825 | ret->stack_size = 0; |
| 3826 | ret->movm_args = 0; |
| 3827 | ret->movm_stack_size = 0; |
| 3828 | ret->pcrel_relocs_copied = NULL; |
| 3829 | ret->flags = 0; |
| 3830 | } |
| 3831 | |
| 3832 | return (struct bfd_hash_entry *) ret; |
| 3833 | } |
| 3834 | |
| 3835 | /* Create an mn10300 ELF linker hash table. */ |
| 3836 | |
| 3837 | static struct bfd_link_hash_table * |
| 3838 | elf32_mn10300_link_hash_table_create (abfd) |
| 3839 | bfd *abfd; |
| 3840 | { |
| 3841 | struct elf32_mn10300_link_hash_table *ret; |
| 3842 | bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table); |
| 3843 | |
| 3844 | ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt); |
| 3845 | if (ret == (struct elf32_mn10300_link_hash_table *) NULL) |
| 3846 | return NULL; |
| 3847 | |
| 3848 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 3849 | elf32_mn10300_link_hash_newfunc)) |
| 3850 | { |
| 3851 | free (ret); |
| 3852 | return NULL; |
| 3853 | } |
| 3854 | |
| 3855 | ret->flags = 0; |
| 3856 | amt = sizeof (struct elf_link_hash_table); |
| 3857 | ret->static_hash_table |
| 3858 | = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt); |
| 3859 | if (ret->static_hash_table == NULL) |
| 3860 | { |
| 3861 | free (ret); |
| 3862 | return NULL; |
| 3863 | } |
| 3864 | |
| 3865 | if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, |
| 3866 | elf32_mn10300_link_hash_newfunc)) |
| 3867 | { |
| 3868 | free (ret->static_hash_table); |
| 3869 | free (ret); |
| 3870 | return NULL; |
| 3871 | } |
| 3872 | return &ret->root.root; |
| 3873 | } |
| 3874 | |
| 3875 | /* Free an mn10300 ELF linker hash table. */ |
| 3876 | |
| 3877 | static void |
| 3878 | elf32_mn10300_link_hash_table_free (hash) |
| 3879 | struct bfd_link_hash_table *hash; |
| 3880 | { |
| 3881 | struct elf32_mn10300_link_hash_table *ret |
| 3882 | = (struct elf32_mn10300_link_hash_table *) hash; |
| 3883 | |
| 3884 | _bfd_generic_link_hash_table_free |
| 3885 | ((struct bfd_link_hash_table *) ret->static_hash_table); |
| 3886 | _bfd_generic_link_hash_table_free |
| 3887 | ((struct bfd_link_hash_table *) ret); |
| 3888 | } |
| 3889 | |
| 3890 | static unsigned long |
| 3891 | elf_mn10300_mach (flags) |
| 3892 | flagword flags; |
| 3893 | { |
| 3894 | switch (flags & EF_MN10300_MACH) |
| 3895 | { |
| 3896 | case E_MN10300_MACH_MN10300: |
| 3897 | default: |
| 3898 | return bfd_mach_mn10300; |
| 3899 | |
| 3900 | case E_MN10300_MACH_AM33: |
| 3901 | return bfd_mach_am33; |
| 3902 | |
| 3903 | case E_MN10300_MACH_AM33_2: |
| 3904 | return bfd_mach_am33_2; |
| 3905 | } |
| 3906 | } |
| 3907 | |
| 3908 | /* The final processing done just before writing out a MN10300 ELF object |
| 3909 | file. This gets the MN10300 architecture right based on the machine |
| 3910 | number. */ |
| 3911 | |
| 3912 | void |
| 3913 | _bfd_mn10300_elf_final_write_processing (abfd, linker) |
| 3914 | bfd *abfd; |
| 3915 | bfd_boolean linker ATTRIBUTE_UNUSED; |
| 3916 | { |
| 3917 | unsigned long val; |
| 3918 | |
| 3919 | switch (bfd_get_mach (abfd)) |
| 3920 | { |
| 3921 | default: |
| 3922 | case bfd_mach_mn10300: |
| 3923 | val = E_MN10300_MACH_MN10300; |
| 3924 | break; |
| 3925 | |
| 3926 | case bfd_mach_am33: |
| 3927 | val = E_MN10300_MACH_AM33; |
| 3928 | break; |
| 3929 | |
| 3930 | case bfd_mach_am33_2: |
| 3931 | val = E_MN10300_MACH_AM33_2; |
| 3932 | break; |
| 3933 | } |
| 3934 | |
| 3935 | elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH); |
| 3936 | elf_elfheader (abfd)->e_flags |= val; |
| 3937 | } |
| 3938 | |
| 3939 | bfd_boolean |
| 3940 | _bfd_mn10300_elf_object_p (abfd) |
| 3941 | bfd *abfd; |
| 3942 | { |
| 3943 | bfd_default_set_arch_mach (abfd, bfd_arch_mn10300, |
| 3944 | elf_mn10300_mach (elf_elfheader (abfd)->e_flags)); |
| 3945 | return TRUE; |
| 3946 | } |
| 3947 | |
| 3948 | /* Merge backend specific data from an object file to the output |
| 3949 | object file when linking. */ |
| 3950 | |
| 3951 | bfd_boolean |
| 3952 | _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd) |
| 3953 | bfd *ibfd; |
| 3954 | bfd *obfd; |
| 3955 | { |
| 3956 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 3957 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 3958 | return TRUE; |
| 3959 | |
| 3960 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 3961 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
| 3962 | { |
| 3963 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 3964 | bfd_get_mach (ibfd))) |
| 3965 | return FALSE; |
| 3966 | } |
| 3967 | |
| 3968 | return TRUE; |
| 3969 | } |
| 3970 | |
| 3971 | #define PLT0_ENTRY_SIZE 15 |
| 3972 | #define PLT_ENTRY_SIZE 20 |
| 3973 | #define PIC_PLT_ENTRY_SIZE 24 |
| 3974 | |
| 3975 | static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] = |
| 3976 | { |
| 3977 | 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */ |
| 3978 | 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */ |
| 3979 | 0xf0, 0xf4, /* jmp (a0) */ |
| 3980 | }; |
| 3981 | |
| 3982 | static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] = |
| 3983 | { |
| 3984 | 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */ |
| 3985 | 0xf0, 0xf4, /* jmp (a0) */ |
| 3986 | 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */ |
| 3987 | 0xdc, 0, 0, 0, 0, /* jmp .plt0 */ |
| 3988 | }; |
| 3989 | |
| 3990 | static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] = |
| 3991 | { |
| 3992 | 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */ |
| 3993 | 0xf0, 0xf4, /* jmp (a0) */ |
| 3994 | 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */ |
| 3995 | 0xf8, 0x22, 8, /* mov (8,a2),a0 */ |
| 3996 | 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */ |
| 3997 | 0xf0, 0xf4, /* jmp (a0) */ |
| 3998 | }; |
| 3999 | |
| 4000 | /* Return size of the first PLT entry. */ |
| 4001 | #define elf_mn10300_sizeof_plt0(info) \ |
| 4002 | (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE) |
| 4003 | |
| 4004 | /* Return size of a PLT entry. */ |
| 4005 | #define elf_mn10300_sizeof_plt(info) \ |
| 4006 | (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE) |
| 4007 | |
| 4008 | /* Return offset of the PLT0 address in an absolute PLT entry. */ |
| 4009 | #define elf_mn10300_plt_plt0_offset(info) 16 |
| 4010 | |
| 4011 | /* Return offset of the linker in PLT0 entry. */ |
| 4012 | #define elf_mn10300_plt0_linker_offset(info) 2 |
| 4013 | |
| 4014 | /* Return offset of the GOT id in PLT0 entry. */ |
| 4015 | #define elf_mn10300_plt0_gotid_offset(info) 9 |
| 4016 | |
| 4017 | /* Return offset of the temporary in PLT entry */ |
| 4018 | #define elf_mn10300_plt_temp_offset(info) 8 |
| 4019 | |
| 4020 | /* Return offset of the symbol in PLT entry. */ |
| 4021 | #define elf_mn10300_plt_symbol_offset(info) 2 |
| 4022 | |
| 4023 | /* Return offset of the relocation in PLT entry. */ |
| 4024 | #define elf_mn10300_plt_reloc_offset(info) 11 |
| 4025 | |
| 4026 | /* The name of the dynamic interpreter. This is put in the .interp |
| 4027 | section. */ |
| 4028 | |
| 4029 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 4030 | |
| 4031 | /* Create dynamic sections when linking against a dynamic object. */ |
| 4032 | |
| 4033 | static bfd_boolean |
| 4034 | _bfd_mn10300_elf_create_dynamic_sections (abfd, info) |
| 4035 | bfd *abfd; |
| 4036 | struct bfd_link_info *info; |
| 4037 | { |
| 4038 | flagword flags; |
| 4039 | asection * s; |
| 4040 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
| 4041 | int ptralign = 0; |
| 4042 | |
| 4043 | switch (bed->s->arch_size) |
| 4044 | { |
| 4045 | case 32: |
| 4046 | ptralign = 2; |
| 4047 | break; |
| 4048 | |
| 4049 | case 64: |
| 4050 | ptralign = 3; |
| 4051 | break; |
| 4052 | |
| 4053 | default: |
| 4054 | bfd_set_error (bfd_error_bad_value); |
| 4055 | return FALSE; |
| 4056 | } |
| 4057 | |
| 4058 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 4059 | .rel[a].bss sections. */ |
| 4060 | |
| 4061 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 4062 | | SEC_LINKER_CREATED); |
| 4063 | |
| 4064 | s = bfd_make_section (abfd, |
| 4065 | bed->default_use_rela_p ? ".rela.plt" : ".rel.plt"); |
| 4066 | if (s == NULL |
| 4067 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| 4068 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 4069 | return FALSE; |
| 4070 | |
| 4071 | if (! _bfd_mn10300_elf_create_got_section (abfd, info)) |
| 4072 | return FALSE; |
| 4073 | |
| 4074 | { |
| 4075 | const char * secname; |
| 4076 | char * relname; |
| 4077 | flagword secflags; |
| 4078 | asection * sec; |
| 4079 | |
| 4080 | for (sec = abfd->sections; sec; sec = sec->next) |
| 4081 | { |
| 4082 | secflags = bfd_get_section_flags (abfd, sec); |
| 4083 | if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) |
| 4084 | || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) |
| 4085 | continue; |
| 4086 | |
| 4087 | secname = bfd_get_section_name (abfd, sec); |
| 4088 | relname = (char *) bfd_malloc (strlen (secname) + 6); |
| 4089 | strcpy (relname, ".rela"); |
| 4090 | strcat (relname, secname); |
| 4091 | |
| 4092 | s = bfd_make_section (abfd, relname); |
| 4093 | if (s == NULL |
| 4094 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| 4095 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 4096 | return FALSE; |
| 4097 | } |
| 4098 | } |
| 4099 | |
| 4100 | if (bed->want_dynbss) |
| 4101 | { |
| 4102 | /* The .dynbss section is a place to put symbols which are defined |
| 4103 | by dynamic objects, are referenced by regular objects, and are |
| 4104 | not functions. We must allocate space for them in the process |
| 4105 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 4106 | initialize them at run time. The linker script puts the .dynbss |
| 4107 | section into the .bss section of the final image. */ |
| 4108 | s = bfd_make_section (abfd, ".dynbss"); |
| 4109 | if (s == NULL |
| 4110 | || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) |
| 4111 | return FALSE; |
| 4112 | |
| 4113 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 4114 | normally needed. We need to create it here, though, so that the |
| 4115 | linker will map it to an output section. We can't just create it |
| 4116 | only if we need it, because we will not know whether we need it |
| 4117 | until we have seen all the input files, and the first time the |
| 4118 | main linker code calls BFD after examining all the input files |
| 4119 | (size_dynamic_sections) the input sections have already been |
| 4120 | mapped to the output sections. If the section turns out not to |
| 4121 | be needed, we can discard it later. We will never need this |
| 4122 | section when generating a shared object, since they do not use |
| 4123 | copy relocs. */ |
| 4124 | if (! info->shared) |
| 4125 | { |
| 4126 | s = bfd_make_section (abfd, |
| 4127 | (bed->default_use_rela_p |
| 4128 | ? ".rela.bss" : ".rel.bss")); |
| 4129 | if (s == NULL |
| 4130 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| 4131 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 4132 | return FALSE; |
| 4133 | } |
| 4134 | } |
| 4135 | |
| 4136 | return TRUE; |
| 4137 | } |
| 4138 | \f |
| 4139 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 4140 | regular object. The current definition is in some section of the |
| 4141 | dynamic object, but we're not including those sections. We have to |
| 4142 | change the definition to something the rest of the link can |
| 4143 | understand. */ |
| 4144 | |
| 4145 | static bfd_boolean |
| 4146 | _bfd_mn10300_elf_adjust_dynamic_symbol (info, h) |
| 4147 | struct bfd_link_info * info; |
| 4148 | struct elf_link_hash_entry * h; |
| 4149 | { |
| 4150 | bfd * dynobj; |
| 4151 | asection * s; |
| 4152 | unsigned int power_of_two; |
| 4153 | |
| 4154 | dynobj = elf_hash_table (info)->dynobj; |
| 4155 | |
| 4156 | /* Make sure we know what is going on here. */ |
| 4157 | BFD_ASSERT (dynobj != NULL |
| 4158 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 4159 | || h->weakdef != NULL |
| 4160 | || ((h->elf_link_hash_flags |
| 4161 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 4162 | && (h->elf_link_hash_flags |
| 4163 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 4164 | && (h->elf_link_hash_flags |
| 4165 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 4166 | |
| 4167 | /* If this is a function, put it in the procedure linkage table. We |
| 4168 | will fill in the contents of the procedure linkage table later, |
| 4169 | when we know the address of the .got section. */ |
| 4170 | if (h->type == STT_FUNC |
| 4171 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 4172 | { |
| 4173 | if (! info->shared |
| 4174 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 4175 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) |
| 4176 | { |
| 4177 | /* This case can occur if we saw a PLT reloc in an input |
| 4178 | file, but the symbol was never referred to by a dynamic |
| 4179 | object. In such a case, we don't actually need to build |
| 4180 | a procedure linkage table, and we can just do a REL32 |
| 4181 | reloc instead. */ |
| 4182 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| 4183 | return TRUE; |
| 4184 | } |
| 4185 | |
| 4186 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 4187 | if (h->dynindx == -1) |
| 4188 | { |
| 4189 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4190 | return FALSE; |
| 4191 | } |
| 4192 | |
| 4193 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 4194 | BFD_ASSERT (s != NULL); |
| 4195 | |
| 4196 | /* If this is the first .plt entry, make room for the special |
| 4197 | first entry. */ |
| 4198 | if (s->_raw_size == 0) |
| 4199 | s->_raw_size += elf_mn10300_sizeof_plt0 (info); |
| 4200 | |
| 4201 | /* If this symbol is not defined in a regular file, and we are |
| 4202 | not generating a shared library, then set the symbol to this |
| 4203 | location in the .plt. This is required to make function |
| 4204 | pointers compare as equal between the normal executable and |
| 4205 | the shared library. */ |
| 4206 | if (! info->shared |
| 4207 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 4208 | { |
| 4209 | h->root.u.def.section = s; |
| 4210 | h->root.u.def.value = s->_raw_size; |
| 4211 | } |
| 4212 | |
| 4213 | h->plt.offset = s->_raw_size; |
| 4214 | |
| 4215 | /* Make room for this entry. */ |
| 4216 | s->_raw_size += elf_mn10300_sizeof_plt (info); |
| 4217 | |
| 4218 | /* We also need to make an entry in the .got.plt section, which |
| 4219 | will be placed in the .got section by the linker script. */ |
| 4220 | |
| 4221 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 4222 | BFD_ASSERT (s != NULL); |
| 4223 | s->_raw_size += 4; |
| 4224 | |
| 4225 | /* We also need to make an entry in the .rela.plt section. */ |
| 4226 | |
| 4227 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 4228 | BFD_ASSERT (s != NULL); |
| 4229 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 4230 | |
| 4231 | return TRUE; |
| 4232 | } |
| 4233 | |
| 4234 | /* If this is a weak symbol, and there is a real definition, the |
| 4235 | processor independent code will have arranged for us to see the |
| 4236 | real definition first, and we can just use the same value. */ |
| 4237 | if (h->weakdef != NULL) |
| 4238 | { |
| 4239 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 4240 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 4241 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 4242 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 4243 | return TRUE; |
| 4244 | } |
| 4245 | |
| 4246 | /* This is a reference to a symbol defined by a dynamic object which |
| 4247 | is not a function. */ |
| 4248 | |
| 4249 | /* If we are creating a shared library, we must presume that the |
| 4250 | only references to the symbol are via the global offset table. |
| 4251 | For such cases we need not do anything here; the relocations will |
| 4252 | be handled correctly by relocate_section. */ |
| 4253 | if (info->shared) |
| 4254 | return TRUE; |
| 4255 | |
| 4256 | /* If there are no references to this symbol that do not use the |
| 4257 | GOT, we don't need to generate a copy reloc. */ |
| 4258 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 4259 | return TRUE; |
| 4260 | |
| 4261 | /* We must allocate the symbol in our .dynbss section, which will |
| 4262 | become part of the .bss section of the executable. There will be |
| 4263 | an entry for this symbol in the .dynsym section. The dynamic |
| 4264 | object will contain position independent code, so all references |
| 4265 | from the dynamic object to this symbol will go through the global |
| 4266 | offset table. The dynamic linker will use the .dynsym entry to |
| 4267 | determine the address it must put in the global offset table, so |
| 4268 | both the dynamic object and the regular object will refer to the |
| 4269 | same memory location for the variable. */ |
| 4270 | |
| 4271 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 4272 | BFD_ASSERT (s != NULL); |
| 4273 | |
| 4274 | /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to |
| 4275 | copy the initial value out of the dynamic object and into the |
| 4276 | runtime process image. We need to remember the offset into the |
| 4277 | .rela.bss section we are going to use. */ |
| 4278 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 4279 | { |
| 4280 | asection * srel; |
| 4281 | |
| 4282 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 4283 | BFD_ASSERT (srel != NULL); |
| 4284 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 4285 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 4286 | } |
| 4287 | |
| 4288 | /* We need to figure out the alignment required for this symbol. I |
| 4289 | have no idea how ELF linkers handle this. */ |
| 4290 | power_of_two = bfd_log2 (h->size); |
| 4291 | if (power_of_two > 3) |
| 4292 | power_of_two = 3; |
| 4293 | |
| 4294 | /* Apply the required alignment. */ |
| 4295 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 4296 | (bfd_size_type) (1 << power_of_two)); |
| 4297 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 4298 | { |
| 4299 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 4300 | return FALSE; |
| 4301 | } |
| 4302 | |
| 4303 | /* Define the symbol as being at this point in the section. */ |
| 4304 | h->root.u.def.section = s; |
| 4305 | h->root.u.def.value = s->_raw_size; |
| 4306 | |
| 4307 | /* Increment the section size to make room for the symbol. */ |
| 4308 | s->_raw_size += h->size; |
| 4309 | |
| 4310 | return TRUE; |
| 4311 | } |
| 4312 | |
| 4313 | /* This function is called via elf32_mn10300_link_hash_traverse if we are |
| 4314 | creating a shared object with -Bsymbolic. It discards the space |
| 4315 | allocated to copy PC relative relocs against symbols which are |
| 4316 | defined in regular objects. We allocated space for them in the |
| 4317 | check_relocs routine, but we won't fill them in in the |
| 4318 | relocate_section routine. */ |
| 4319 | |
| 4320 | static bfd_boolean |
| 4321 | _bfd_mn10300_elf_discard_copies (h, info) |
| 4322 | struct elf32_mn10300_link_hash_entry *h; |
| 4323 | struct bfd_link_info *info; |
| 4324 | { |
| 4325 | struct elf_mn10300_pcrel_relocs_copied *s; |
| 4326 | |
| 4327 | /* If a symbol has been forced local or we have found a regular |
| 4328 | definition for the symbolic link case, then we won't be needing |
| 4329 | any relocs. */ |
| 4330 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 4331 | && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 4332 | || info->symbolic)) |
| 4333 | { |
| 4334 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) |
| 4335 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel); |
| 4336 | } |
| 4337 | |
| 4338 | return TRUE; |
| 4339 | } |
| 4340 | |
| 4341 | /* Set the sizes of the dynamic sections. */ |
| 4342 | |
| 4343 | static bfd_boolean |
| 4344 | _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info) |
| 4345 | bfd * output_bfd; |
| 4346 | struct bfd_link_info * info; |
| 4347 | { |
| 4348 | bfd * dynobj; |
| 4349 | asection * s; |
| 4350 | bfd_boolean plt; |
| 4351 | bfd_boolean relocs; |
| 4352 | bfd_boolean reltext; |
| 4353 | |
| 4354 | dynobj = elf_hash_table (info)->dynobj; |
| 4355 | BFD_ASSERT (dynobj != NULL); |
| 4356 | |
| 4357 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4358 | { |
| 4359 | /* Set the contents of the .interp section to the interpreter. */ |
| 4360 | if (info->executable) |
| 4361 | { |
| 4362 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 4363 | BFD_ASSERT (s != NULL); |
| 4364 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 4365 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 4366 | } |
| 4367 | } |
| 4368 | else |
| 4369 | { |
| 4370 | /* We may have created entries in the .rela.got section. |
| 4371 | However, if we are not creating the dynamic sections, we will |
| 4372 | not actually use these entries. Reset the size of .rela.got, |
| 4373 | which will cause it to get stripped from the output file |
| 4374 | below. */ |
| 4375 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 4376 | if (s != NULL) |
| 4377 | s->_raw_size = 0; |
| 4378 | } |
| 4379 | |
| 4380 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 4381 | PC relative relocs against symbols defined in a regular object. |
| 4382 | We allocated space for them in the check_relocs routine, but we |
| 4383 | will not fill them in in the relocate_section routine. */ |
| 4384 | if (info->shared && info->symbolic) |
| 4385 | elf32_mn10300_link_hash_traverse (elf32_mn10300_hash_table (info), |
| 4386 | _bfd_mn10300_elf_discard_copies, |
| 4387 | info); |
| 4388 | |
| 4389 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 4390 | determined the sizes of the various dynamic sections. Allocate |
| 4391 | memory for them. */ |
| 4392 | plt = FALSE; |
| 4393 | relocs = FALSE; |
| 4394 | reltext = FALSE; |
| 4395 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 4396 | { |
| 4397 | const char * name; |
| 4398 | bfd_boolean strip; |
| 4399 | |
| 4400 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 4401 | continue; |
| 4402 | |
| 4403 | /* It's OK to base decisions on the section name, because none |
| 4404 | of the dynobj section names depend upon the input files. */ |
| 4405 | name = bfd_get_section_name (dynobj, s); |
| 4406 | |
| 4407 | strip = FALSE; |
| 4408 | |
| 4409 | if (strcmp (name, ".plt") == 0) |
| 4410 | { |
| 4411 | if (s->_raw_size == 0) |
| 4412 | /* Strip this section if we don't need it; see the |
| 4413 | comment below. */ |
| 4414 | strip = TRUE; |
| 4415 | else |
| 4416 | /* Remember whether there is a PLT. */ |
| 4417 | plt = TRUE; |
| 4418 | } |
| 4419 | else if (strncmp (name, ".rela", 5) == 0) |
| 4420 | { |
| 4421 | if (s->_raw_size == 0) |
| 4422 | { |
| 4423 | /* If we don't need this section, strip it from the |
| 4424 | output file. This is mostly to handle .rela.bss and |
| 4425 | .rela.plt. We must create both sections in |
| 4426 | create_dynamic_sections, because they must be created |
| 4427 | before the linker maps input sections to output |
| 4428 | sections. The linker does that before |
| 4429 | adjust_dynamic_symbol is called, and it is that |
| 4430 | function which decides whether anything needs to go |
| 4431 | into these sections. */ |
| 4432 | strip = TRUE; |
| 4433 | } |
| 4434 | else |
| 4435 | { |
| 4436 | asection * target; |
| 4437 | |
| 4438 | /* Remember whether there are any reloc sections other |
| 4439 | than .rela.plt. */ |
| 4440 | if (strcmp (name, ".rela.plt") != 0) |
| 4441 | { |
| 4442 | const char * outname; |
| 4443 | |
| 4444 | relocs = TRUE; |
| 4445 | |
| 4446 | /* If this relocation section applies to a read only |
| 4447 | section, then we probably need a DT_TEXTREL |
| 4448 | entry. The entries in the .rela.plt section |
| 4449 | really apply to the .got section, which we |
| 4450 | created ourselves and so know is not readonly. */ |
| 4451 | outname = bfd_get_section_name (output_bfd, |
| 4452 | s->output_section); |
| 4453 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 4454 | if (target != NULL |
| 4455 | && (target->flags & SEC_READONLY) != 0 |
| 4456 | && (target->flags & SEC_ALLOC) != 0) |
| 4457 | reltext = TRUE; |
| 4458 | } |
| 4459 | |
| 4460 | /* We use the reloc_count field as a counter if we need |
| 4461 | to copy relocs into the output file. */ |
| 4462 | s->reloc_count = 0; |
| 4463 | } |
| 4464 | } |
| 4465 | else if (strncmp (name, ".got", 4) != 0) |
| 4466 | /* It's not one of our sections, so don't allocate space. */ |
| 4467 | continue; |
| 4468 | |
| 4469 | if (strip) |
| 4470 | { |
| 4471 | _bfd_strip_section_from_output (info, s); |
| 4472 | continue; |
| 4473 | } |
| 4474 | |
| 4475 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 4476 | here in case unused entries are not reclaimed before the |
| 4477 | section's contents are written out. This should not happen, |
| 4478 | but this way if it does, we get a R_MN10300_NONE reloc |
| 4479 | instead of garbage. */ |
| 4480 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 4481 | if (s->contents == NULL && s->_raw_size != 0) |
| 4482 | return FALSE; |
| 4483 | } |
| 4484 | |
| 4485 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4486 | { |
| 4487 | /* Add some entries to the .dynamic section. We fill in the |
| 4488 | values later, in _bfd_mn10300_elf_finish_dynamic_sections, |
| 4489 | but we must add the entries now so that we get the correct |
| 4490 | size for the .dynamic section. The DT_DEBUG entry is filled |
| 4491 | in by the dynamic linker and used by the debugger. */ |
| 4492 | if (! info->shared) |
| 4493 | { |
| 4494 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 4495 | return FALSE; |
| 4496 | } |
| 4497 | |
| 4498 | if (plt) |
| 4499 | { |
| 4500 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 4501 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 4502 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 4503 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 4504 | return FALSE; |
| 4505 | } |
| 4506 | |
| 4507 | if (relocs) |
| 4508 | { |
| 4509 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) |
| 4510 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) |
| 4511 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
| 4512 | sizeof (Elf32_External_Rela))) |
| 4513 | return FALSE; |
| 4514 | } |
| 4515 | |
| 4516 | if (reltext) |
| 4517 | { |
| 4518 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 4519 | return FALSE; |
| 4520 | } |
| 4521 | } |
| 4522 | |
| 4523 | return TRUE; |
| 4524 | } |
| 4525 | |
| 4526 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4527 | dynamic sections here. */ |
| 4528 | |
| 4529 | static bfd_boolean |
| 4530 | _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 4531 | bfd * output_bfd; |
| 4532 | struct bfd_link_info * info; |
| 4533 | struct elf_link_hash_entry * h; |
| 4534 | Elf_Internal_Sym * sym; |
| 4535 | { |
| 4536 | bfd * dynobj; |
| 4537 | |
| 4538 | dynobj = elf_hash_table (info)->dynobj; |
| 4539 | |
| 4540 | if (h->plt.offset != (bfd_vma) -1) |
| 4541 | { |
| 4542 | asection * splt; |
| 4543 | asection * sgot; |
| 4544 | asection * srel; |
| 4545 | bfd_vma plt_index; |
| 4546 | bfd_vma got_offset; |
| 4547 | Elf_Internal_Rela rel; |
| 4548 | |
| 4549 | /* This symbol has an entry in the procedure linkage table. Set |
| 4550 | it up. */ |
| 4551 | |
| 4552 | BFD_ASSERT (h->dynindx != -1); |
| 4553 | |
| 4554 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 4555 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 4556 | srel = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 4557 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); |
| 4558 | |
| 4559 | /* Get the index in the procedure linkage table which |
| 4560 | corresponds to this symbol. This is the index of this symbol |
| 4561 | in all the symbols for which we are making plt entries. The |
| 4562 | first entry in the procedure linkage table is reserved. */ |
| 4563 | plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info)) |
| 4564 | / elf_mn10300_sizeof_plt (info)); |
| 4565 | |
| 4566 | /* Get the offset into the .got table of the entry that |
| 4567 | corresponds to this function. Each .got entry is 4 bytes. |
| 4568 | The first three are reserved. */ |
| 4569 | got_offset = (plt_index + 3) * 4; |
| 4570 | |
| 4571 | /* Fill in the entry in the procedure linkage table. */ |
| 4572 | if (! info->shared) |
| 4573 | { |
| 4574 | memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry, |
| 4575 | elf_mn10300_sizeof_plt (info)); |
| 4576 | bfd_put_32 (output_bfd, |
| 4577 | (sgot->output_section->vma |
| 4578 | + sgot->output_offset |
| 4579 | + got_offset), |
| 4580 | (splt->contents + h->plt.offset |
| 4581 | + elf_mn10300_plt_symbol_offset (info))); |
| 4582 | |
| 4583 | bfd_put_32 (output_bfd, |
| 4584 | (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)), |
| 4585 | (splt->contents + h->plt.offset |
| 4586 | + elf_mn10300_plt_plt0_offset (info))); |
| 4587 | } |
| 4588 | else |
| 4589 | { |
| 4590 | memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry, |
| 4591 | elf_mn10300_sizeof_plt (info)); |
| 4592 | |
| 4593 | bfd_put_32 (output_bfd, got_offset, |
| 4594 | (splt->contents + h->plt.offset |
| 4595 | + elf_mn10300_plt_symbol_offset (info))); |
| 4596 | } |
| 4597 | |
| 4598 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), |
| 4599 | (splt->contents + h->plt.offset |
| 4600 | + elf_mn10300_plt_reloc_offset (info))); |
| 4601 | |
| 4602 | /* Fill in the entry in the global offset table. */ |
| 4603 | bfd_put_32 (output_bfd, |
| 4604 | (splt->output_section->vma |
| 4605 | + splt->output_offset |
| 4606 | + h->plt.offset |
| 4607 | + elf_mn10300_plt_temp_offset (info)), |
| 4608 | sgot->contents + got_offset); |
| 4609 | |
| 4610 | /* Fill in the entry in the .rela.plt section. */ |
| 4611 | rel.r_offset = (sgot->output_section->vma |
| 4612 | + sgot->output_offset |
| 4613 | + got_offset); |
| 4614 | rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT); |
| 4615 | rel.r_addend = 0; |
| 4616 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 4617 | (bfd_byte *) ((Elf32_External_Rela *) srel->contents |
| 4618 | + plt_index)); |
| 4619 | |
| 4620 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 4621 | /* Mark the symbol as undefined, rather than as defined in |
| 4622 | the .plt section. Leave the value alone. */ |
| 4623 | sym->st_shndx = SHN_UNDEF; |
| 4624 | } |
| 4625 | |
| 4626 | if (h->got.offset != (bfd_vma) -1) |
| 4627 | { |
| 4628 | asection * sgot; |
| 4629 | asection * srel; |
| 4630 | Elf_Internal_Rela rel; |
| 4631 | |
| 4632 | /* This symbol has an entry in the global offset table. Set it up. */ |
| 4633 | |
| 4634 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 4635 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 4636 | BFD_ASSERT (sgot != NULL && srel != NULL); |
| 4637 | |
| 4638 | rel.r_offset = (sgot->output_section->vma |
| 4639 | + sgot->output_offset |
| 4640 | + (h->got.offset &~ 1)); |
| 4641 | |
| 4642 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 4643 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 4644 | the symbol was forced to be local because of a version file. |
| 4645 | The entry in the global offset table will already have been |
| 4646 | initialized in the relocate_section function. */ |
| 4647 | if (info->shared |
| 4648 | && (info->symbolic || h->dynindx == -1) |
| 4649 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 4650 | { |
| 4651 | rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); |
| 4652 | rel.r_addend = (h->root.u.def.value |
| 4653 | + h->root.u.def.section->output_section->vma |
| 4654 | + h->root.u.def.section->output_offset); |
| 4655 | } |
| 4656 | else |
| 4657 | { |
| 4658 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 4659 | rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT); |
| 4660 | rel.r_addend = 0; |
| 4661 | } |
| 4662 | |
| 4663 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 4664 | (bfd_byte *) ((Elf32_External_Rela *) srel->contents |
| 4665 | + srel->reloc_count)); |
| 4666 | ++ srel->reloc_count; |
| 4667 | } |
| 4668 | |
| 4669 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 4670 | { |
| 4671 | asection * s; |
| 4672 | Elf_Internal_Rela rel; |
| 4673 | |
| 4674 | /* This symbol needs a copy reloc. Set it up. */ |
| 4675 | BFD_ASSERT (h->dynindx != -1 |
| 4676 | && (h->root.type == bfd_link_hash_defined |
| 4677 | || h->root.type == bfd_link_hash_defweak)); |
| 4678 | |
| 4679 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 4680 | ".rela.bss"); |
| 4681 | BFD_ASSERT (s != NULL); |
| 4682 | |
| 4683 | rel.r_offset = (h->root.u.def.value |
| 4684 | + h->root.u.def.section->output_section->vma |
| 4685 | + h->root.u.def.section->output_offset); |
| 4686 | rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY); |
| 4687 | rel.r_addend = 0; |
| 4688 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 4689 | (bfd_byte *) ((Elf32_External_Rela *) s->contents |
| 4690 | + s->reloc_count)); |
| 4691 | ++ s->reloc_count; |
| 4692 | } |
| 4693 | |
| 4694 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 4695 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 4696 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 4697 | sym->st_shndx = SHN_ABS; |
| 4698 | |
| 4699 | return TRUE; |
| 4700 | } |
| 4701 | |
| 4702 | /* Finish up the dynamic sections. */ |
| 4703 | |
| 4704 | static bfd_boolean |
| 4705 | _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info) |
| 4706 | bfd * output_bfd; |
| 4707 | struct bfd_link_info * info; |
| 4708 | { |
| 4709 | bfd * dynobj; |
| 4710 | asection * sgot; |
| 4711 | asection * sdyn; |
| 4712 | |
| 4713 | dynobj = elf_hash_table (info)->dynobj; |
| 4714 | |
| 4715 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 4716 | BFD_ASSERT (sgot != NULL); |
| 4717 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 4718 | |
| 4719 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4720 | { |
| 4721 | asection * splt; |
| 4722 | Elf32_External_Dyn * dyncon; |
| 4723 | Elf32_External_Dyn * dynconend; |
| 4724 | |
| 4725 | BFD_ASSERT (sdyn != NULL); |
| 4726 | |
| 4727 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4728 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 4729 | |
| 4730 | for (; dyncon < dynconend; dyncon++) |
| 4731 | { |
| 4732 | Elf_Internal_Dyn dyn; |
| 4733 | const char * name; |
| 4734 | asection * s; |
| 4735 | |
| 4736 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4737 | |
| 4738 | switch (dyn.d_tag) |
| 4739 | { |
| 4740 | default: |
| 4741 | break; |
| 4742 | |
| 4743 | case DT_PLTGOT: |
| 4744 | name = ".got"; |
| 4745 | goto get_vma; |
| 4746 | |
| 4747 | case DT_JMPREL: |
| 4748 | name = ".rela.plt"; |
| 4749 | get_vma: |
| 4750 | s = bfd_get_section_by_name (output_bfd, name); |
| 4751 | BFD_ASSERT (s != NULL); |
| 4752 | dyn.d_un.d_ptr = s->vma; |
| 4753 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4754 | break; |
| 4755 | |
| 4756 | case DT_PLTRELSZ: |
| 4757 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 4758 | BFD_ASSERT (s != NULL); |
| 4759 | if (s->_cooked_size != 0) |
| 4760 | dyn.d_un.d_val = s->_cooked_size; |
| 4761 | else |
| 4762 | dyn.d_un.d_val = s->_raw_size; |
| 4763 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4764 | break; |
| 4765 | |
| 4766 | case DT_RELASZ: |
| 4767 | /* My reading of the SVR4 ABI indicates that the |
| 4768 | procedure linkage table relocs (DT_JMPREL) should be |
| 4769 | included in the overall relocs (DT_RELA). This is |
| 4770 | what Solaris does. However, UnixWare can not handle |
| 4771 | that case. Therefore, we override the DT_RELASZ entry |
| 4772 | here to make it not include the JMPREL relocs. Since |
| 4773 | the linker script arranges for .rela.plt to follow all |
| 4774 | other relocation sections, we don't have to worry |
| 4775 | about changing the DT_RELA entry. */ |
| 4776 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 4777 | if (s != NULL) |
| 4778 | { |
| 4779 | if (s->_cooked_size != 0) |
| 4780 | dyn.d_un.d_val -= s->_cooked_size; |
| 4781 | else |
| 4782 | dyn.d_un.d_val -= s->_raw_size; |
| 4783 | } |
| 4784 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4785 | break; |
| 4786 | } |
| 4787 | } |
| 4788 | |
| 4789 | /* Fill in the first entry in the procedure linkage table. */ |
| 4790 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 4791 | if (splt && splt->_raw_size > 0) |
| 4792 | { |
| 4793 | if (info->shared) |
| 4794 | { |
| 4795 | memcpy (splt->contents, elf_mn10300_pic_plt_entry, |
| 4796 | elf_mn10300_sizeof_plt (info)); |
| 4797 | } |
| 4798 | else |
| 4799 | { |
| 4800 | memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE); |
| 4801 | bfd_put_32 (output_bfd, |
| 4802 | sgot->output_section->vma + sgot->output_offset + 4, |
| 4803 | splt->contents + elf_mn10300_plt0_gotid_offset (info)); |
| 4804 | bfd_put_32 (output_bfd, |
| 4805 | sgot->output_section->vma + sgot->output_offset + 8, |
| 4806 | splt->contents + elf_mn10300_plt0_linker_offset (info)); |
| 4807 | } |
| 4808 | |
| 4809 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
| 4810 | really seem like the right value. */ |
| 4811 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; |
| 4812 | } |
| 4813 | } |
| 4814 | |
| 4815 | /* Fill in the first three entries in the global offset table. */ |
| 4816 | if (sgot->_raw_size > 0) |
| 4817 | { |
| 4818 | if (sdyn == NULL) |
| 4819 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 4820 | else |
| 4821 | bfd_put_32 (output_bfd, |
| 4822 | sdyn->output_section->vma + sdyn->output_offset, |
| 4823 | sgot->contents); |
| 4824 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 4825 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 4826 | } |
| 4827 | |
| 4828 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 4829 | |
| 4830 | return TRUE; |
| 4831 | } |
| 4832 | |
| 4833 | #ifndef ELF_ARCH |
| 4834 | #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec |
| 4835 | #define TARGET_LITTLE_NAME "elf32-mn10300" |
| 4836 | #define ELF_ARCH bfd_arch_mn10300 |
| 4837 | #define ELF_MACHINE_CODE EM_MN10300 |
| 4838 | #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300 |
| 4839 | #define ELF_MAXPAGESIZE 0x1000 |
| 4840 | #endif |
| 4841 | |
| 4842 | #define elf_info_to_howto mn10300_info_to_howto |
| 4843 | #define elf_info_to_howto_rel 0 |
| 4844 | #define elf_backend_can_gc_sections 1 |
| 4845 | #define elf_backend_rela_normal 1 |
| 4846 | #define elf_backend_check_relocs mn10300_elf_check_relocs |
| 4847 | #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook |
| 4848 | #define elf_backend_relocate_section mn10300_elf_relocate_section |
| 4849 | #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section |
| 4850 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 4851 | mn10300_elf_get_relocated_section_contents |
| 4852 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 4853 | elf32_mn10300_link_hash_table_create |
| 4854 | #define bfd_elf32_bfd_link_hash_table_free \ |
| 4855 | elf32_mn10300_link_hash_table_free |
| 4856 | |
| 4857 | #ifndef elf_symbol_leading_char |
| 4858 | #define elf_symbol_leading_char '_' |
| 4859 | #endif |
| 4860 | |
| 4861 | /* So we can set bits in e_flags. */ |
| 4862 | #define elf_backend_final_write_processing \ |
| 4863 | _bfd_mn10300_elf_final_write_processing |
| 4864 | #define elf_backend_object_p _bfd_mn10300_elf_object_p |
| 4865 | |
| 4866 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 4867 | _bfd_mn10300_elf_merge_private_bfd_data |
| 4868 | |
| 4869 | #define elf_backend_can_gc_sections 1 |
| 4870 | #define elf_backend_create_dynamic_sections \ |
| 4871 | _bfd_mn10300_elf_create_dynamic_sections |
| 4872 | #define elf_backend_adjust_dynamic_symbol \ |
| 4873 | _bfd_mn10300_elf_adjust_dynamic_symbol |
| 4874 | #define elf_backend_size_dynamic_sections \ |
| 4875 | _bfd_mn10300_elf_size_dynamic_sections |
| 4876 | #define elf_backend_finish_dynamic_symbol \ |
| 4877 | _bfd_mn10300_elf_finish_dynamic_symbol |
| 4878 | #define elf_backend_finish_dynamic_sections \ |
| 4879 | _bfd_mn10300_elf_finish_dynamic_sections |
| 4880 | |
| 4881 | #define elf_backend_want_got_plt 1 |
| 4882 | #define elf_backend_plt_readonly 1 |
| 4883 | #define elf_backend_want_plt_sym 0 |
| 4884 | #define elf_backend_got_header_size 12 |
| 4885 | |
| 4886 | #include "elf32-target.h" |