| 1 | /* SPU specific support for 32-bit ELF |
| 2 | |
| 3 | Copyright 2006, 2007 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 along |
| 18 | with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/spu.h" |
| 27 | #include "elf32-spu.h" |
| 28 | |
| 29 | /* We use RELA style relocs. Don't define USE_REL. */ |
| 30 | |
| 31 | static bfd_reloc_status_type spu_elf_rel9 (bfd *, arelent *, asymbol *, |
| 32 | void *, asection *, |
| 33 | bfd *, char **); |
| 34 | |
| 35 | /* Values of type 'enum elf_spu_reloc_type' are used to index this |
| 36 | array, so it must be declared in the order of that type. */ |
| 37 | |
| 38 | static reloc_howto_type elf_howto_table[] = { |
| 39 | HOWTO (R_SPU_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 40 | bfd_elf_generic_reloc, "SPU_NONE", |
| 41 | FALSE, 0, 0x00000000, FALSE), |
| 42 | HOWTO (R_SPU_ADDR10, 4, 2, 10, FALSE, 14, complain_overflow_bitfield, |
| 43 | bfd_elf_generic_reloc, "SPU_ADDR10", |
| 44 | FALSE, 0, 0x00ffc000, FALSE), |
| 45 | HOWTO (R_SPU_ADDR16, 2, 2, 16, FALSE, 7, complain_overflow_bitfield, |
| 46 | bfd_elf_generic_reloc, "SPU_ADDR16", |
| 47 | FALSE, 0, 0x007fff80, FALSE), |
| 48 | HOWTO (R_SPU_ADDR16_HI, 16, 2, 16, FALSE, 7, complain_overflow_bitfield, |
| 49 | bfd_elf_generic_reloc, "SPU_ADDR16_HI", |
| 50 | FALSE, 0, 0x007fff80, FALSE), |
| 51 | HOWTO (R_SPU_ADDR16_LO, 0, 2, 16, FALSE, 7, complain_overflow_dont, |
| 52 | bfd_elf_generic_reloc, "SPU_ADDR16_LO", |
| 53 | FALSE, 0, 0x007fff80, FALSE), |
| 54 | HOWTO (R_SPU_ADDR18, 0, 2, 18, FALSE, 7, complain_overflow_bitfield, |
| 55 | bfd_elf_generic_reloc, "SPU_ADDR18", |
| 56 | FALSE, 0, 0x01ffff80, FALSE), |
| 57 | HOWTO (R_SPU_ADDR32, 0, 2, 32, FALSE, 0, complain_overflow_dont, |
| 58 | bfd_elf_generic_reloc, "SPU_ADDR32", |
| 59 | FALSE, 0, 0xffffffff, FALSE), |
| 60 | HOWTO (R_SPU_REL16, 2, 2, 16, TRUE, 7, complain_overflow_bitfield, |
| 61 | bfd_elf_generic_reloc, "SPU_REL16", |
| 62 | FALSE, 0, 0x007fff80, TRUE), |
| 63 | HOWTO (R_SPU_ADDR7, 0, 2, 7, FALSE, 14, complain_overflow_dont, |
| 64 | bfd_elf_generic_reloc, "SPU_ADDR7", |
| 65 | FALSE, 0, 0x001fc000, FALSE), |
| 66 | HOWTO (R_SPU_REL9, 2, 2, 9, TRUE, 0, complain_overflow_signed, |
| 67 | spu_elf_rel9, "SPU_REL9", |
| 68 | FALSE, 0, 0x0180007f, TRUE), |
| 69 | HOWTO (R_SPU_REL9I, 2, 2, 9, TRUE, 0, complain_overflow_signed, |
| 70 | spu_elf_rel9, "SPU_REL9I", |
| 71 | FALSE, 0, 0x0000c07f, TRUE), |
| 72 | HOWTO (R_SPU_ADDR10I, 0, 2, 10, FALSE, 14, complain_overflow_signed, |
| 73 | bfd_elf_generic_reloc, "SPU_ADDR10I", |
| 74 | FALSE, 0, 0x00ffc000, FALSE), |
| 75 | HOWTO (R_SPU_ADDR16I, 0, 2, 16, FALSE, 7, complain_overflow_signed, |
| 76 | bfd_elf_generic_reloc, "SPU_ADDR16I", |
| 77 | FALSE, 0, 0x007fff80, FALSE), |
| 78 | HOWTO (R_SPU_REL32, 0, 2, 32, TRUE, 0, complain_overflow_dont, |
| 79 | bfd_elf_generic_reloc, "SPU_REL32", |
| 80 | FALSE, 0, 0xffffffff, TRUE), |
| 81 | }; |
| 82 | |
| 83 | static struct bfd_elf_special_section const spu_elf_special_sections[] = { |
| 84 | { ".toe", 4, 0, SHT_NOBITS, SHF_ALLOC }, |
| 85 | { NULL, 0, 0, 0, 0 } |
| 86 | }; |
| 87 | |
| 88 | static enum elf_spu_reloc_type |
| 89 | spu_elf_bfd_to_reloc_type (bfd_reloc_code_real_type code) |
| 90 | { |
| 91 | switch (code) |
| 92 | { |
| 93 | default: |
| 94 | return R_SPU_NONE; |
| 95 | case BFD_RELOC_SPU_IMM10W: |
| 96 | return R_SPU_ADDR10; |
| 97 | case BFD_RELOC_SPU_IMM16W: |
| 98 | return R_SPU_ADDR16; |
| 99 | case BFD_RELOC_SPU_LO16: |
| 100 | return R_SPU_ADDR16_LO; |
| 101 | case BFD_RELOC_SPU_HI16: |
| 102 | return R_SPU_ADDR16_HI; |
| 103 | case BFD_RELOC_SPU_IMM18: |
| 104 | return R_SPU_ADDR18; |
| 105 | case BFD_RELOC_SPU_PCREL16: |
| 106 | return R_SPU_REL16; |
| 107 | case BFD_RELOC_SPU_IMM7: |
| 108 | return R_SPU_ADDR7; |
| 109 | case BFD_RELOC_SPU_IMM8: |
| 110 | return R_SPU_NONE; |
| 111 | case BFD_RELOC_SPU_PCREL9a: |
| 112 | return R_SPU_REL9; |
| 113 | case BFD_RELOC_SPU_PCREL9b: |
| 114 | return R_SPU_REL9I; |
| 115 | case BFD_RELOC_SPU_IMM10: |
| 116 | return R_SPU_ADDR10I; |
| 117 | case BFD_RELOC_SPU_IMM16: |
| 118 | return R_SPU_ADDR16I; |
| 119 | case BFD_RELOC_32: |
| 120 | return R_SPU_ADDR32; |
| 121 | case BFD_RELOC_32_PCREL: |
| 122 | return R_SPU_REL32; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | static void |
| 127 | spu_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 128 | arelent *cache_ptr, |
| 129 | Elf_Internal_Rela *dst) |
| 130 | { |
| 131 | enum elf_spu_reloc_type r_type; |
| 132 | |
| 133 | r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info); |
| 134 | BFD_ASSERT (r_type < R_SPU_max); |
| 135 | cache_ptr->howto = &elf_howto_table[(int) r_type]; |
| 136 | } |
| 137 | |
| 138 | static reloc_howto_type * |
| 139 | spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 140 | bfd_reloc_code_real_type code) |
| 141 | { |
| 142 | return elf_howto_table + spu_elf_bfd_to_reloc_type (code); |
| 143 | } |
| 144 | |
| 145 | static reloc_howto_type * |
| 146 | spu_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 147 | const char *r_name) |
| 148 | { |
| 149 | unsigned int i; |
| 150 | |
| 151 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) |
| 152 | if (elf_howto_table[i].name != NULL |
| 153 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) |
| 154 | return &elf_howto_table[i]; |
| 155 | |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */ |
| 160 | |
| 161 | static bfd_reloc_status_type |
| 162 | spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 163 | void *data, asection *input_section, |
| 164 | bfd *output_bfd, char **error_message) |
| 165 | { |
| 166 | bfd_size_type octets; |
| 167 | bfd_vma val; |
| 168 | long insn; |
| 169 | |
| 170 | /* If this is a relocatable link (output_bfd test tells us), just |
| 171 | call the generic function. Any adjustment will be done at final |
| 172 | link time. */ |
| 173 | if (output_bfd != NULL) |
| 174 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 175 | input_section, output_bfd, error_message); |
| 176 | |
| 177 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 178 | return bfd_reloc_outofrange; |
| 179 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| 180 | |
| 181 | /* Get symbol value. */ |
| 182 | val = 0; |
| 183 | if (!bfd_is_com_section (symbol->section)) |
| 184 | val = symbol->value; |
| 185 | if (symbol->section->output_section) |
| 186 | val += symbol->section->output_section->vma; |
| 187 | |
| 188 | val += reloc_entry->addend; |
| 189 | |
| 190 | /* Make it pc-relative. */ |
| 191 | val -= input_section->output_section->vma + input_section->output_offset; |
| 192 | |
| 193 | val >>= 2; |
| 194 | if (val + 256 >= 512) |
| 195 | return bfd_reloc_overflow; |
| 196 | |
| 197 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| 198 | |
| 199 | /* Move two high bits of value to REL9I and REL9 position. |
| 200 | The mask will take care of selecting the right field. */ |
| 201 | val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16); |
| 202 | insn &= ~reloc_entry->howto->dst_mask; |
| 203 | insn |= val & reloc_entry->howto->dst_mask; |
| 204 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
| 205 | return bfd_reloc_ok; |
| 206 | } |
| 207 | |
| 208 | static bfd_boolean |
| 209 | spu_elf_new_section_hook (bfd *abfd, asection *sec) |
| 210 | { |
| 211 | if (!sec->used_by_bfd) |
| 212 | { |
| 213 | struct _spu_elf_section_data *sdata; |
| 214 | |
| 215 | sdata = bfd_zalloc (abfd, sizeof (*sdata)); |
| 216 | if (sdata == NULL) |
| 217 | return FALSE; |
| 218 | sec->used_by_bfd = sdata; |
| 219 | } |
| 220 | |
| 221 | return _bfd_elf_new_section_hook (abfd, sec); |
| 222 | } |
| 223 | |
| 224 | /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that |
| 225 | strip --strip-unneeded will not remove them. */ |
| 226 | |
| 227 | static void |
| 228 | spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym) |
| 229 | { |
| 230 | if (sym->name != NULL |
| 231 | && sym->section != bfd_abs_section_ptr |
| 232 | && strncmp (sym->name, "_EAR_", 5) == 0) |
| 233 | sym->flags |= BSF_KEEP; |
| 234 | } |
| 235 | |
| 236 | /* SPU ELF linker hash table. */ |
| 237 | |
| 238 | struct spu_link_hash_table |
| 239 | { |
| 240 | struct elf_link_hash_table elf; |
| 241 | |
| 242 | /* The stub hash table. */ |
| 243 | struct bfd_hash_table stub_hash_table; |
| 244 | |
| 245 | /* Shortcuts to overlay sections. */ |
| 246 | asection *stub; |
| 247 | asection *ovtab; |
| 248 | |
| 249 | struct elf_link_hash_entry *ovly_load; |
| 250 | |
| 251 | /* An array of two output sections per overlay region, chosen such that |
| 252 | the first section vma is the overlay buffer vma (ie. the section has |
| 253 | the lowest vma in the group that occupy the region), and the second |
| 254 | section vma+size specifies the end of the region. We keep pointers |
| 255 | to sections like this because section vmas may change when laying |
| 256 | them out. */ |
| 257 | asection **ovl_region; |
| 258 | |
| 259 | /* Number of overlay buffers. */ |
| 260 | unsigned int num_buf; |
| 261 | |
| 262 | /* Total number of overlays. */ |
| 263 | unsigned int num_overlays; |
| 264 | |
| 265 | /* Set if we should emit symbols for stubs. */ |
| 266 | unsigned int emit_stub_syms:1; |
| 267 | |
| 268 | /* Set if we want stubs on calls out of overlay regions to |
| 269 | non-overlay regions. */ |
| 270 | unsigned int non_overlay_stubs : 1; |
| 271 | |
| 272 | /* Set on error. */ |
| 273 | unsigned int stub_overflow : 1; |
| 274 | }; |
| 275 | |
| 276 | #define spu_hash_table(p) \ |
| 277 | ((struct spu_link_hash_table *) ((p)->hash)) |
| 278 | |
| 279 | struct spu_stub_hash_entry |
| 280 | { |
| 281 | struct bfd_hash_entry root; |
| 282 | |
| 283 | /* Destination of this stub. */ |
| 284 | asection *target_section; |
| 285 | bfd_vma target_off; |
| 286 | |
| 287 | /* Offset of entry in stub section. */ |
| 288 | bfd_vma off; |
| 289 | |
| 290 | /* Offset from this stub to stub that loads the overlay index. */ |
| 291 | bfd_vma delta; |
| 292 | }; |
| 293 | |
| 294 | /* Create an entry in a spu stub hash table. */ |
| 295 | |
| 296 | static struct bfd_hash_entry * |
| 297 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 298 | struct bfd_hash_table *table, |
| 299 | const char *string) |
| 300 | { |
| 301 | /* Allocate the structure if it has not already been allocated by a |
| 302 | subclass. */ |
| 303 | if (entry == NULL) |
| 304 | { |
| 305 | entry = bfd_hash_allocate (table, sizeof (struct spu_stub_hash_entry)); |
| 306 | if (entry == NULL) |
| 307 | return entry; |
| 308 | } |
| 309 | |
| 310 | /* Call the allocation method of the superclass. */ |
| 311 | entry = bfd_hash_newfunc (entry, table, string); |
| 312 | if (entry != NULL) |
| 313 | { |
| 314 | struct spu_stub_hash_entry *sh = (struct spu_stub_hash_entry *) entry; |
| 315 | |
| 316 | sh->target_section = NULL; |
| 317 | sh->target_off = 0; |
| 318 | sh->off = 0; |
| 319 | sh->delta = 0; |
| 320 | } |
| 321 | |
| 322 | return entry; |
| 323 | } |
| 324 | |
| 325 | /* Create a spu ELF linker hash table. */ |
| 326 | |
| 327 | static struct bfd_link_hash_table * |
| 328 | spu_elf_link_hash_table_create (bfd *abfd) |
| 329 | { |
| 330 | struct spu_link_hash_table *htab; |
| 331 | |
| 332 | htab = bfd_malloc (sizeof (*htab)); |
| 333 | if (htab == NULL) |
| 334 | return NULL; |
| 335 | |
| 336 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, |
| 337 | _bfd_elf_link_hash_newfunc, |
| 338 | sizeof (struct elf_link_hash_entry))) |
| 339 | { |
| 340 | free (htab); |
| 341 | return NULL; |
| 342 | } |
| 343 | |
| 344 | /* Init the stub hash table too. */ |
| 345 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, |
| 346 | sizeof (struct spu_stub_hash_entry))) |
| 347 | return NULL; |
| 348 | |
| 349 | memset (&htab->stub, 0, |
| 350 | sizeof (*htab) - offsetof (struct spu_link_hash_table, stub)); |
| 351 | |
| 352 | return &htab->elf.root; |
| 353 | } |
| 354 | |
| 355 | /* Free the derived linker hash table. */ |
| 356 | |
| 357 | static void |
| 358 | spu_elf_link_hash_table_free (struct bfd_link_hash_table *hash) |
| 359 | { |
| 360 | struct spu_link_hash_table *ret = (struct spu_link_hash_table *) hash; |
| 361 | |
| 362 | bfd_hash_table_free (&ret->stub_hash_table); |
| 363 | _bfd_generic_link_hash_table_free (hash); |
| 364 | } |
| 365 | |
| 366 | /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP |
| 367 | to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set |
| 368 | *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */ |
| 369 | |
| 370 | static bfd_boolean |
| 371 | get_sym_h (struct elf_link_hash_entry **hp, |
| 372 | Elf_Internal_Sym **symp, |
| 373 | asection **symsecp, |
| 374 | Elf_Internal_Sym **locsymsp, |
| 375 | unsigned long r_symndx, |
| 376 | bfd *ibfd) |
| 377 | { |
| 378 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 379 | |
| 380 | if (r_symndx >= symtab_hdr->sh_info) |
| 381 | { |
| 382 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 383 | struct elf_link_hash_entry *h; |
| 384 | |
| 385 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 386 | while (h->root.type == bfd_link_hash_indirect |
| 387 | || h->root.type == bfd_link_hash_warning) |
| 388 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 389 | |
| 390 | if (hp != NULL) |
| 391 | *hp = h; |
| 392 | |
| 393 | if (symp != NULL) |
| 394 | *symp = NULL; |
| 395 | |
| 396 | if (symsecp != NULL) |
| 397 | { |
| 398 | asection *symsec = NULL; |
| 399 | if (h->root.type == bfd_link_hash_defined |
| 400 | || h->root.type == bfd_link_hash_defweak) |
| 401 | symsec = h->root.u.def.section; |
| 402 | *symsecp = symsec; |
| 403 | } |
| 404 | } |
| 405 | else |
| 406 | { |
| 407 | Elf_Internal_Sym *sym; |
| 408 | Elf_Internal_Sym *locsyms = *locsymsp; |
| 409 | |
| 410 | if (locsyms == NULL) |
| 411 | { |
| 412 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 413 | if (locsyms == NULL) |
| 414 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 415 | symtab_hdr->sh_info, |
| 416 | 0, NULL, NULL, NULL); |
| 417 | if (locsyms == NULL) |
| 418 | return FALSE; |
| 419 | *locsymsp = locsyms; |
| 420 | } |
| 421 | sym = locsyms + r_symndx; |
| 422 | |
| 423 | if (hp != NULL) |
| 424 | *hp = NULL; |
| 425 | |
| 426 | if (symp != NULL) |
| 427 | *symp = sym; |
| 428 | |
| 429 | if (symsecp != NULL) |
| 430 | { |
| 431 | asection *symsec = NULL; |
| 432 | if ((sym->st_shndx != SHN_UNDEF |
| 433 | && sym->st_shndx < SHN_LORESERVE) |
| 434 | || sym->st_shndx > SHN_HIRESERVE) |
| 435 | symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
| 436 | *symsecp = symsec; |
| 437 | } |
| 438 | } |
| 439 | return TRUE; |
| 440 | } |
| 441 | |
| 442 | /* Build a name for an entry in the stub hash table. We can't use a |
| 443 | local symbol name because ld -r might generate duplicate local symbols. */ |
| 444 | |
| 445 | static char * |
| 446 | spu_stub_name (const asection *sym_sec, |
| 447 | const struct elf_link_hash_entry *h, |
| 448 | const Elf_Internal_Rela *rel) |
| 449 | { |
| 450 | char *stub_name; |
| 451 | bfd_size_type len; |
| 452 | |
| 453 | if (h) |
| 454 | { |
| 455 | len = strlen (h->root.root.string) + 1 + 8 + 1; |
| 456 | stub_name = bfd_malloc (len); |
| 457 | if (stub_name == NULL) |
| 458 | return stub_name; |
| 459 | |
| 460 | sprintf (stub_name, "%s+%x", |
| 461 | h->root.root.string, |
| 462 | (int) rel->r_addend & 0xffffffff); |
| 463 | len -= 8; |
| 464 | } |
| 465 | else |
| 466 | { |
| 467 | len = 8 + 1 + 8 + 1 + 8 + 1; |
| 468 | stub_name = bfd_malloc (len); |
| 469 | if (stub_name == NULL) |
| 470 | return stub_name; |
| 471 | |
| 472 | sprintf (stub_name, "%x:%x+%x", |
| 473 | sym_sec->id & 0xffffffff, |
| 474 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 475 | (int) rel->r_addend & 0xffffffff); |
| 476 | len = strlen (stub_name); |
| 477 | } |
| 478 | |
| 479 | if (stub_name[len - 2] == '+' |
| 480 | && stub_name[len - 1] == '0' |
| 481 | && stub_name[len] == 0) |
| 482 | stub_name[len - 2] = 0; |
| 483 | |
| 484 | return stub_name; |
| 485 | } |
| 486 | |
| 487 | /* Create the note section if not already present. This is done early so |
| 488 | that the linker maps the sections to the right place in the output. */ |
| 489 | |
| 490 | bfd_boolean |
| 491 | spu_elf_create_sections (bfd *output_bfd, struct bfd_link_info *info) |
| 492 | { |
| 493 | bfd *ibfd; |
| 494 | |
| 495 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->next) |
| 496 | if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL) |
| 497 | break; |
| 498 | |
| 499 | if (ibfd == NULL) |
| 500 | { |
| 501 | /* Make SPU_PTNOTE_SPUNAME section. */ |
| 502 | asection *s; |
| 503 | size_t name_len; |
| 504 | size_t size; |
| 505 | bfd_byte *data; |
| 506 | flagword flags; |
| 507 | |
| 508 | ibfd = info->input_bfds; |
| 509 | flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 510 | s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags); |
| 511 | if (s == NULL |
| 512 | || !bfd_set_section_alignment (ibfd, s, 4)) |
| 513 | return FALSE; |
| 514 | |
| 515 | name_len = strlen (bfd_get_filename (output_bfd)) + 1; |
| 516 | size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4); |
| 517 | size += (name_len + 3) & -4; |
| 518 | |
| 519 | if (!bfd_set_section_size (ibfd, s, size)) |
| 520 | return FALSE; |
| 521 | |
| 522 | data = bfd_zalloc (ibfd, size); |
| 523 | if (data == NULL) |
| 524 | return FALSE; |
| 525 | |
| 526 | bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0); |
| 527 | bfd_put_32 (ibfd, name_len, data + 4); |
| 528 | bfd_put_32 (ibfd, 1, data + 8); |
| 529 | memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME)); |
| 530 | memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4), |
| 531 | bfd_get_filename (output_bfd), name_len); |
| 532 | s->contents = data; |
| 533 | } |
| 534 | |
| 535 | return TRUE; |
| 536 | } |
| 537 | |
| 538 | /* Return the section that should be marked against GC for a given |
| 539 | relocation. */ |
| 540 | |
| 541 | static asection * |
| 542 | spu_elf_gc_mark_hook (asection *sec, |
| 543 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 544 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, |
| 545 | struct elf_link_hash_entry *h, |
| 546 | Elf_Internal_Sym *sym) |
| 547 | { |
| 548 | if (h != NULL) |
| 549 | { |
| 550 | switch (h->root.type) |
| 551 | { |
| 552 | case bfd_link_hash_defined: |
| 553 | case bfd_link_hash_defweak: |
| 554 | return h->root.u.def.section; |
| 555 | |
| 556 | case bfd_link_hash_common: |
| 557 | return h->root.u.c.p->section; |
| 558 | |
| 559 | default: |
| 560 | break; |
| 561 | } |
| 562 | } |
| 563 | else |
| 564 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 565 | |
| 566 | return NULL; |
| 567 | } |
| 568 | |
| 569 | /* qsort predicate to sort sections by vma. */ |
| 570 | |
| 571 | static int |
| 572 | sort_sections (const void *a, const void *b) |
| 573 | { |
| 574 | const asection *const *s1 = a; |
| 575 | const asection *const *s2 = b; |
| 576 | bfd_signed_vma delta = (*s1)->vma - (*s2)->vma; |
| 577 | |
| 578 | if (delta != 0) |
| 579 | return delta < 0 ? -1 : 1; |
| 580 | |
| 581 | return (*s1)->index - (*s2)->index; |
| 582 | } |
| 583 | |
| 584 | /* Identify overlays in the output bfd, and number them. */ |
| 585 | |
| 586 | bfd_boolean |
| 587 | spu_elf_find_overlays (bfd *output_bfd, struct bfd_link_info *info) |
| 588 | { |
| 589 | struct spu_link_hash_table *htab = spu_hash_table (info); |
| 590 | asection **alloc_sec; |
| 591 | unsigned int i, n, ovl_index, num_buf; |
| 592 | asection *s; |
| 593 | bfd_vma ovl_end; |
| 594 | |
| 595 | if (output_bfd->section_count < 2) |
| 596 | return FALSE; |
| 597 | |
| 598 | alloc_sec = bfd_malloc (output_bfd->section_count * sizeof (*alloc_sec)); |
| 599 | if (alloc_sec == NULL) |
| 600 | return FALSE; |
| 601 | |
| 602 | /* Pick out all the alloced sections. */ |
| 603 | for (n = 0, s = output_bfd->sections; s != NULL; s = s->next) |
| 604 | if ((s->flags & SEC_ALLOC) != 0 |
| 605 | && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL |
| 606 | && s->size != 0) |
| 607 | alloc_sec[n++] = s; |
| 608 | |
| 609 | if (n == 0) |
| 610 | { |
| 611 | free (alloc_sec); |
| 612 | return FALSE; |
| 613 | } |
| 614 | |
| 615 | /* Sort them by vma. */ |
| 616 | qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections); |
| 617 | |
| 618 | /* Look for overlapping vmas. Any with overlap must be overlays. |
| 619 | Count them. Also count the number of overlay regions and for |
| 620 | each region save a section from that region with the lowest vma |
| 621 | and another section with the highest end vma. */ |
| 622 | ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size; |
| 623 | for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++) |
| 624 | { |
| 625 | s = alloc_sec[i]; |
| 626 | if (s->vma < ovl_end) |
| 627 | { |
| 628 | asection *s0 = alloc_sec[i - 1]; |
| 629 | |
| 630 | if (spu_elf_section_data (s0)->ovl_index == 0) |
| 631 | { |
| 632 | spu_elf_section_data (s0)->ovl_index = ++ovl_index; |
| 633 | alloc_sec[num_buf * 2] = s0; |
| 634 | alloc_sec[num_buf * 2 + 1] = s0; |
| 635 | num_buf++; |
| 636 | } |
| 637 | spu_elf_section_data (s)->ovl_index = ++ovl_index; |
| 638 | if (ovl_end < s->vma + s->size) |
| 639 | { |
| 640 | ovl_end = s->vma + s->size; |
| 641 | alloc_sec[num_buf * 2 - 1] = s; |
| 642 | } |
| 643 | } |
| 644 | else |
| 645 | ovl_end = s->vma + s->size; |
| 646 | } |
| 647 | |
| 648 | htab->num_overlays = ovl_index; |
| 649 | htab->num_buf = num_buf; |
| 650 | if (ovl_index == 0) |
| 651 | { |
| 652 | free (alloc_sec); |
| 653 | return FALSE; |
| 654 | } |
| 655 | |
| 656 | alloc_sec = bfd_realloc (alloc_sec, num_buf * 2 * sizeof (*alloc_sec)); |
| 657 | if (alloc_sec == NULL) |
| 658 | return FALSE; |
| 659 | |
| 660 | htab->ovl_region = alloc_sec; |
| 661 | return TRUE; |
| 662 | } |
| 663 | |
| 664 | /* One of these per stub. */ |
| 665 | #define SIZEOF_STUB1 8 |
| 666 | #define ILA_79 0x4200004f /* ila $79,function_address */ |
| 667 | #define BR 0x32000000 /* br stub2 */ |
| 668 | |
| 669 | /* One of these per overlay. */ |
| 670 | #define SIZEOF_STUB2 8 |
| 671 | #define ILA_78 0x4200004e /* ila $78,overlay_number */ |
| 672 | /* br __ovly_load */ |
| 673 | #define NOP 0x40200000 |
| 674 | |
| 675 | /* Return true for all relative and absolute branch and hint instructions. |
| 676 | bra 00110000 0.. |
| 677 | brasl 00110001 0.. |
| 678 | br 00110010 0.. |
| 679 | brsl 00110011 0.. |
| 680 | brz 00100000 0.. |
| 681 | brnz 00100001 0.. |
| 682 | brhz 00100010 0.. |
| 683 | brhnz 00100011 0.. |
| 684 | hbra 0001000.. |
| 685 | hbrr 0001001.. */ |
| 686 | |
| 687 | static bfd_boolean |
| 688 | is_branch (const unsigned char *insn) |
| 689 | { |
| 690 | return (((insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0) |
| 691 | || (insn[0] & 0xfc) == 0x10); |
| 692 | } |
| 693 | |
| 694 | /* Return TRUE if this reloc symbol should possibly go via an overlay stub. */ |
| 695 | |
| 696 | static bfd_boolean |
| 697 | needs_ovl_stub (const char *sym_name, |
| 698 | asection *sym_sec, |
| 699 | asection *input_section, |
| 700 | struct spu_link_hash_table *htab, |
| 701 | bfd_boolean is_branch) |
| 702 | { |
| 703 | if (htab->num_overlays == 0) |
| 704 | return FALSE; |
| 705 | |
| 706 | if (sym_sec == NULL |
| 707 | || sym_sec->output_section == NULL |
| 708 | || spu_elf_section_data (sym_sec->output_section) == NULL) |
| 709 | return FALSE; |
| 710 | |
| 711 | /* setjmp always goes via an overlay stub, because then the return |
| 712 | and hence the longjmp goes via __ovly_return. That magically |
| 713 | makes setjmp/longjmp between overlays work. */ |
| 714 | if (strncmp (sym_name, "setjmp", 6) == 0 |
| 715 | && (sym_name[6] == '\0' || sym_name[6] == '@')) |
| 716 | return TRUE; |
| 717 | |
| 718 | /* Usually, symbols in non-overlay sections don't need stubs. */ |
| 719 | if (spu_elf_section_data (sym_sec->output_section)->ovl_index == 0 |
| 720 | && !htab->non_overlay_stubs) |
| 721 | return FALSE; |
| 722 | |
| 723 | /* A reference from some other section to a symbol in an overlay |
| 724 | section needs a stub. */ |
| 725 | if (spu_elf_section_data (sym_sec->output_section)->ovl_index |
| 726 | != spu_elf_section_data (input_section->output_section)->ovl_index) |
| 727 | return TRUE; |
| 728 | |
| 729 | /* If this insn isn't a branch then we are possibly taking the |
| 730 | address of a function and passing it out somehow. */ |
| 731 | return !is_branch; |
| 732 | } |
| 733 | |
| 734 | struct stubarr { |
| 735 | struct bfd_hash_table *stub_hash_table; |
| 736 | struct spu_stub_hash_entry **sh; |
| 737 | unsigned int count; |
| 738 | int err; |
| 739 | }; |
| 740 | |
| 741 | /* Called via elf_link_hash_traverse to allocate stubs for any _SPUEAR_ |
| 742 | symbols. */ |
| 743 | |
| 744 | static bfd_boolean |
| 745 | allocate_spuear_stubs (struct elf_link_hash_entry *h, void *inf) |
| 746 | { |
| 747 | /* Symbols starting with _SPUEAR_ need a stub because they may be |
| 748 | invoked by the PPU. */ |
| 749 | if ((h->root.type == bfd_link_hash_defined |
| 750 | || h->root.type == bfd_link_hash_defweak) |
| 751 | && h->def_regular |
| 752 | && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0) |
| 753 | { |
| 754 | struct stubarr *stubs = inf; |
| 755 | static Elf_Internal_Rela zero_rel; |
| 756 | char *stub_name = spu_stub_name (h->root.u.def.section, h, &zero_rel); |
| 757 | struct spu_stub_hash_entry *sh; |
| 758 | |
| 759 | if (stub_name == NULL) |
| 760 | { |
| 761 | stubs->err = 1; |
| 762 | return FALSE; |
| 763 | } |
| 764 | |
| 765 | sh = (struct spu_stub_hash_entry *) |
| 766 | bfd_hash_lookup (stubs->stub_hash_table, stub_name, TRUE, FALSE); |
| 767 | if (sh == NULL) |
| 768 | { |
| 769 | free (stub_name); |
| 770 | return FALSE; |
| 771 | } |
| 772 | |
| 773 | /* If this entry isn't new, we already have a stub. */ |
| 774 | if (sh->target_section != NULL) |
| 775 | { |
| 776 | free (stub_name); |
| 777 | return TRUE; |
| 778 | } |
| 779 | |
| 780 | sh->target_section = h->root.u.def.section; |
| 781 | sh->target_off = h->root.u.def.value; |
| 782 | stubs->count += 1; |
| 783 | } |
| 784 | |
| 785 | return TRUE; |
| 786 | } |
| 787 | |
| 788 | /* Called via bfd_hash_traverse to set up pointers to all symbols |
| 789 | in the stub hash table. */ |
| 790 | |
| 791 | static bfd_boolean |
| 792 | populate_stubs (struct bfd_hash_entry *bh, void *inf) |
| 793 | { |
| 794 | struct stubarr *stubs = inf; |
| 795 | |
| 796 | stubs->sh[--stubs->count] = (struct spu_stub_hash_entry *) bh; |
| 797 | return TRUE; |
| 798 | } |
| 799 | |
| 800 | /* qsort predicate to sort stubs by overlay number. */ |
| 801 | |
| 802 | static int |
| 803 | sort_stubs (const void *a, const void *b) |
| 804 | { |
| 805 | const struct spu_stub_hash_entry *const *sa = a; |
| 806 | const struct spu_stub_hash_entry *const *sb = b; |
| 807 | int i; |
| 808 | bfd_signed_vma d; |
| 809 | |
| 810 | i = spu_elf_section_data ((*sa)->target_section->output_section)->ovl_index; |
| 811 | i -= spu_elf_section_data ((*sb)->target_section->output_section)->ovl_index; |
| 812 | if (i != 0) |
| 813 | return i; |
| 814 | |
| 815 | d = ((*sa)->target_section->output_section->vma |
| 816 | + (*sa)->target_section->output_offset |
| 817 | + (*sa)->target_off |
| 818 | - (*sb)->target_section->output_section->vma |
| 819 | - (*sb)->target_section->output_offset |
| 820 | - (*sb)->target_off); |
| 821 | if (d != 0) |
| 822 | return d < 0 ? -1 : 1; |
| 823 | |
| 824 | /* Two functions at the same address. Aliases perhaps. */ |
| 825 | i = strcmp ((*sb)->root.string, (*sa)->root.string); |
| 826 | BFD_ASSERT (i != 0); |
| 827 | return i; |
| 828 | } |
| 829 | |
| 830 | /* Allocate space for overlay call and return stubs. */ |
| 831 | |
| 832 | bfd_boolean |
| 833 | spu_elf_size_stubs (bfd *output_bfd, |
| 834 | struct bfd_link_info *info, |
| 835 | int non_overlay_stubs, |
| 836 | asection **stub, |
| 837 | asection **ovtab, |
| 838 | asection **toe) |
| 839 | { |
| 840 | struct spu_link_hash_table *htab = spu_hash_table (info); |
| 841 | bfd *ibfd; |
| 842 | struct stubarr stubs; |
| 843 | unsigned i, group; |
| 844 | flagword flags; |
| 845 | |
| 846 | htab->non_overlay_stubs = non_overlay_stubs; |
| 847 | stubs.stub_hash_table = &htab->stub_hash_table; |
| 848 | stubs.count = 0; |
| 849 | stubs.err = 0; |
| 850 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 851 | { |
| 852 | extern const bfd_target bfd_elf32_spu_vec; |
| 853 | Elf_Internal_Shdr *symtab_hdr; |
| 854 | asection *section; |
| 855 | Elf_Internal_Sym *local_syms = NULL; |
| 856 | |
| 857 | if (ibfd->xvec != &bfd_elf32_spu_vec) |
| 858 | continue; |
| 859 | |
| 860 | /* We'll need the symbol table in a second. */ |
| 861 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 862 | if (symtab_hdr->sh_info == 0) |
| 863 | continue; |
| 864 | |
| 865 | /* Walk over each section attached to the input bfd. */ |
| 866 | for (section = ibfd->sections; section != NULL; section = section->next) |
| 867 | { |
| 868 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 869 | |
| 870 | /* If there aren't any relocs, then there's nothing more to do. */ |
| 871 | if ((section->flags & SEC_RELOC) == 0 |
| 872 | || (section->flags & SEC_ALLOC) == 0 |
| 873 | || (section->flags & SEC_LOAD) == 0 |
| 874 | || section->reloc_count == 0) |
| 875 | continue; |
| 876 | |
| 877 | /* If this section is a link-once section that will be |
| 878 | discarded, then don't create any stubs. */ |
| 879 | if (section->output_section == NULL |
| 880 | || section->output_section->owner != output_bfd) |
| 881 | continue; |
| 882 | |
| 883 | /* Get the relocs. */ |
| 884 | internal_relocs |
| 885 | = _bfd_elf_link_read_relocs (ibfd, section, NULL, NULL, |
| 886 | info->keep_memory); |
| 887 | if (internal_relocs == NULL) |
| 888 | goto error_ret_free_local; |
| 889 | |
| 890 | /* Now examine each relocation. */ |
| 891 | irela = internal_relocs; |
| 892 | irelaend = irela + section->reloc_count; |
| 893 | for (; irela < irelaend; irela++) |
| 894 | { |
| 895 | enum elf_spu_reloc_type r_type; |
| 896 | unsigned int r_indx; |
| 897 | asection *sym_sec; |
| 898 | Elf_Internal_Sym *sym; |
| 899 | struct elf_link_hash_entry *h; |
| 900 | const char *sym_name; |
| 901 | char *stub_name; |
| 902 | struct spu_stub_hash_entry *sh; |
| 903 | unsigned int sym_type; |
| 904 | enum _insn_type { non_branch, branch, call } insn_type; |
| 905 | |
| 906 | r_type = ELF32_R_TYPE (irela->r_info); |
| 907 | r_indx = ELF32_R_SYM (irela->r_info); |
| 908 | |
| 909 | if (r_type >= R_SPU_max) |
| 910 | { |
| 911 | bfd_set_error (bfd_error_bad_value); |
| 912 | goto error_ret_free_internal; |
| 913 | } |
| 914 | |
| 915 | /* Determine the reloc target section. */ |
| 916 | if (!get_sym_h (&h, &sym, &sym_sec, &local_syms, r_indx, ibfd)) |
| 917 | goto error_ret_free_internal; |
| 918 | |
| 919 | if (sym_sec == NULL |
| 920 | || sym_sec->output_section == NULL |
| 921 | || sym_sec->output_section->owner != output_bfd) |
| 922 | continue; |
| 923 | |
| 924 | /* Ensure no stubs for user supplied overlay manager syms. */ |
| 925 | if (h != NULL |
| 926 | && (strcmp (h->root.root.string, "__ovly_load") == 0 |
| 927 | || strcmp (h->root.root.string, "__ovly_return") == 0)) |
| 928 | continue; |
| 929 | |
| 930 | insn_type = non_branch; |
| 931 | if (r_type == R_SPU_REL16 |
| 932 | || r_type == R_SPU_ADDR16) |
| 933 | { |
| 934 | unsigned char insn[4]; |
| 935 | |
| 936 | if (!bfd_get_section_contents (ibfd, section, insn, |
| 937 | irela->r_offset, 4)) |
| 938 | goto error_ret_free_internal; |
| 939 | |
| 940 | if (is_branch (insn)) |
| 941 | { |
| 942 | insn_type = branch; |
| 943 | if ((insn[0] & 0xfd) == 0x31) |
| 944 | insn_type = call; |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | /* We are only interested in function symbols. */ |
| 949 | if (h != NULL) |
| 950 | { |
| 951 | sym_type = h->type; |
| 952 | sym_name = h->root.root.string; |
| 953 | } |
| 954 | else |
| 955 | { |
| 956 | sym_type = ELF_ST_TYPE (sym->st_info); |
| 957 | sym_name = bfd_elf_sym_name (sym_sec->owner, |
| 958 | symtab_hdr, |
| 959 | sym, |
| 960 | sym_sec); |
| 961 | } |
| 962 | if (sym_type != STT_FUNC) |
| 963 | { |
| 964 | /* It's common for people to write assembly and forget |
| 965 | to give function symbols the right type. Handle |
| 966 | calls to such symbols, but warn so that (hopefully) |
| 967 | people will fix their code. We need the symbol |
| 968 | type to be correct to distinguish function pointer |
| 969 | initialisation from other pointer initialisation. */ |
| 970 | if (insn_type == call) |
| 971 | (*_bfd_error_handler) (_("warning: call to non-function" |
| 972 | " symbol %s defined in %B"), |
| 973 | sym_sec->owner, sym_name); |
| 974 | else |
| 975 | continue; |
| 976 | } |
| 977 | |
| 978 | if (!needs_ovl_stub (sym_name, sym_sec, section, htab, |
| 979 | insn_type != non_branch)) |
| 980 | continue; |
| 981 | |
| 982 | stub_name = spu_stub_name (sym_sec, h, irela); |
| 983 | if (stub_name == NULL) |
| 984 | goto error_ret_free_internal; |
| 985 | |
| 986 | sh = (struct spu_stub_hash_entry *) |
| 987 | bfd_hash_lookup (&htab->stub_hash_table, stub_name, |
| 988 | TRUE, FALSE); |
| 989 | if (sh == NULL) |
| 990 | { |
| 991 | free (stub_name); |
| 992 | error_ret_free_internal: |
| 993 | if (elf_section_data (section)->relocs != internal_relocs) |
| 994 | free (internal_relocs); |
| 995 | error_ret_free_local: |
| 996 | if (local_syms != NULL |
| 997 | && (symtab_hdr->contents |
| 998 | != (unsigned char *) local_syms)) |
| 999 | free (local_syms); |
| 1000 | return FALSE; |
| 1001 | } |
| 1002 | |
| 1003 | /* If this entry isn't new, we already have a stub. */ |
| 1004 | if (sh->target_section != NULL) |
| 1005 | { |
| 1006 | free (stub_name); |
| 1007 | continue; |
| 1008 | } |
| 1009 | |
| 1010 | sh->target_section = sym_sec; |
| 1011 | if (h != NULL) |
| 1012 | sh->target_off = h->root.u.def.value; |
| 1013 | else |
| 1014 | sh->target_off = sym->st_value; |
| 1015 | sh->target_off += irela->r_addend; |
| 1016 | |
| 1017 | stubs.count += 1; |
| 1018 | } |
| 1019 | |
| 1020 | /* We're done with the internal relocs, free them. */ |
| 1021 | if (elf_section_data (section)->relocs != internal_relocs) |
| 1022 | free (internal_relocs); |
| 1023 | } |
| 1024 | |
| 1025 | if (local_syms != NULL |
| 1026 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 1027 | { |
| 1028 | if (!info->keep_memory) |
| 1029 | free (local_syms); |
| 1030 | else |
| 1031 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | elf_link_hash_traverse (&htab->elf, allocate_spuear_stubs, &stubs); |
| 1036 | if (stubs.err) |
| 1037 | return FALSE; |
| 1038 | |
| 1039 | *stub = NULL; |
| 1040 | if (stubs.count == 0) |
| 1041 | return TRUE; |
| 1042 | |
| 1043 | ibfd = info->input_bfds; |
| 1044 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
| 1045 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); |
| 1046 | htab->stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags); |
| 1047 | *stub = htab->stub; |
| 1048 | if (htab->stub == NULL |
| 1049 | || !bfd_set_section_alignment (ibfd, htab->stub, 2)) |
| 1050 | return FALSE; |
| 1051 | |
| 1052 | flags = (SEC_ALLOC | SEC_LOAD |
| 1053 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); |
| 1054 | htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags); |
| 1055 | *ovtab = htab->ovtab; |
| 1056 | if (htab->ovtab == NULL |
| 1057 | || !bfd_set_section_alignment (ibfd, htab->stub, 4)) |
| 1058 | return FALSE; |
| 1059 | |
| 1060 | *toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC); |
| 1061 | if (*toe == NULL |
| 1062 | || !bfd_set_section_alignment (ibfd, *toe, 4)) |
| 1063 | return FALSE; |
| 1064 | (*toe)->size = 16; |
| 1065 | |
| 1066 | /* Retrieve all the stubs and sort. */ |
| 1067 | stubs.sh = bfd_malloc (stubs.count * sizeof (*stubs.sh)); |
| 1068 | if (stubs.sh == NULL) |
| 1069 | return FALSE; |
| 1070 | i = stubs.count; |
| 1071 | bfd_hash_traverse (&htab->stub_hash_table, populate_stubs, &stubs); |
| 1072 | BFD_ASSERT (stubs.count == 0); |
| 1073 | |
| 1074 | stubs.count = i; |
| 1075 | qsort (stubs.sh, stubs.count, sizeof (*stubs.sh), sort_stubs); |
| 1076 | |
| 1077 | /* Now that the stubs are sorted, place them in the stub section. |
| 1078 | Stubs are grouped per overlay |
| 1079 | . ila $79,func1 |
| 1080 | . br 1f |
| 1081 | . ila $79,func2 |
| 1082 | . br 1f |
| 1083 | . |
| 1084 | . |
| 1085 | . ila $79,funcn |
| 1086 | . nop |
| 1087 | . 1: |
| 1088 | . ila $78,ovl_index |
| 1089 | . br __ovly_load */ |
| 1090 | |
| 1091 | group = 0; |
| 1092 | for (i = 0; i < stubs.count; i++) |
| 1093 | { |
| 1094 | if (spu_elf_section_data (stubs.sh[group]->target_section |
| 1095 | ->output_section)->ovl_index |
| 1096 | != spu_elf_section_data (stubs.sh[i]->target_section |
| 1097 | ->output_section)->ovl_index) |
| 1098 | { |
| 1099 | htab->stub->size += SIZEOF_STUB2; |
| 1100 | for (; group != i; group++) |
| 1101 | stubs.sh[group]->delta |
| 1102 | = stubs.sh[i - 1]->off - stubs.sh[group]->off; |
| 1103 | } |
| 1104 | if (group == i |
| 1105 | || ((stubs.sh[i - 1]->target_section->output_section->vma |
| 1106 | + stubs.sh[i - 1]->target_section->output_offset |
| 1107 | + stubs.sh[i - 1]->target_off) |
| 1108 | != (stubs.sh[i]->target_section->output_section->vma |
| 1109 | + stubs.sh[i]->target_section->output_offset |
| 1110 | + stubs.sh[i]->target_off))) |
| 1111 | { |
| 1112 | stubs.sh[i]->off = htab->stub->size; |
| 1113 | htab->stub->size += SIZEOF_STUB1; |
| 1114 | } |
| 1115 | else |
| 1116 | stubs.sh[i]->off = stubs.sh[i - 1]->off; |
| 1117 | } |
| 1118 | if (group != i) |
| 1119 | htab->stub->size += SIZEOF_STUB2; |
| 1120 | for (; group != i; group++) |
| 1121 | stubs.sh[group]->delta = stubs.sh[i - 1]->off - stubs.sh[group]->off; |
| 1122 | |
| 1123 | /* htab->ovtab consists of two arrays. |
| 1124 | . struct { |
| 1125 | . u32 vma; |
| 1126 | . u32 size; |
| 1127 | . u32 file_off; |
| 1128 | . u32 buf; |
| 1129 | . } _ovly_table[]; |
| 1130 | . |
| 1131 | . struct { |
| 1132 | . u32 mapped; |
| 1133 | . } _ovly_buf_table[]; */ |
| 1134 | |
| 1135 | htab->ovtab->alignment_power = 4; |
| 1136 | htab->ovtab->size = htab->num_overlays * 16 + htab->num_buf * 4; |
| 1137 | |
| 1138 | return TRUE; |
| 1139 | } |
| 1140 | |
| 1141 | /* Functions to handle embedded spu_ovl.o object. */ |
| 1142 | |
| 1143 | static void * |
| 1144 | ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream) |
| 1145 | { |
| 1146 | return stream; |
| 1147 | } |
| 1148 | |
| 1149 | static file_ptr |
| 1150 | ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED, |
| 1151 | void *stream, |
| 1152 | void *buf, |
| 1153 | file_ptr nbytes, |
| 1154 | file_ptr offset) |
| 1155 | { |
| 1156 | struct _ovl_stream *os; |
| 1157 | size_t count; |
| 1158 | size_t max; |
| 1159 | |
| 1160 | os = (struct _ovl_stream *) stream; |
| 1161 | max = (const char *) os->end - (const char *) os->start; |
| 1162 | |
| 1163 | if ((ufile_ptr) offset >= max) |
| 1164 | return 0; |
| 1165 | |
| 1166 | count = nbytes; |
| 1167 | if (count > max - offset) |
| 1168 | count = max - offset; |
| 1169 | |
| 1170 | memcpy (buf, (const char *) os->start + offset, count); |
| 1171 | return count; |
| 1172 | } |
| 1173 | |
| 1174 | bfd_boolean |
| 1175 | spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream) |
| 1176 | { |
| 1177 | *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr", |
| 1178 | "elf32-spu", |
| 1179 | ovl_mgr_open, |
| 1180 | (void *) stream, |
| 1181 | ovl_mgr_pread, |
| 1182 | NULL, |
| 1183 | NULL); |
| 1184 | return *ovl_bfd != NULL; |
| 1185 | } |
| 1186 | |
| 1187 | /* Fill in the ila and br for a stub. On the last stub for a group, |
| 1188 | write the stub that sets the overlay number too. */ |
| 1189 | |
| 1190 | static bfd_boolean |
| 1191 | write_one_stub (struct bfd_hash_entry *bh, void *inf) |
| 1192 | { |
| 1193 | struct spu_stub_hash_entry *ent = (struct spu_stub_hash_entry *) bh; |
| 1194 | struct spu_link_hash_table *htab = inf; |
| 1195 | asection *sec = htab->stub; |
| 1196 | asection *s = ent->target_section; |
| 1197 | unsigned int ovl; |
| 1198 | bfd_vma val; |
| 1199 | |
| 1200 | val = ent->target_off + s->output_offset + s->output_section->vma; |
| 1201 | bfd_put_32 (sec->owner, ILA_79 + ((val << 7) & 0x01ffff80), |
| 1202 | sec->contents + ent->off); |
| 1203 | val = ent->delta + 4; |
| 1204 | bfd_put_32 (sec->owner, BR + ((val << 5) & 0x007fff80), |
| 1205 | sec->contents + ent->off + 4); |
| 1206 | |
| 1207 | /* If this is the last stub of this group, write stub2. */ |
| 1208 | if (ent->delta == 0) |
| 1209 | { |
| 1210 | bfd_put_32 (sec->owner, NOP, |
| 1211 | sec->contents + ent->off + 4); |
| 1212 | |
| 1213 | ovl = spu_elf_section_data (s->output_section)->ovl_index; |
| 1214 | bfd_put_32 (sec->owner, ILA_78 + ((ovl << 7) & 0x01ffff80), |
| 1215 | sec->contents + ent->off + 8); |
| 1216 | |
| 1217 | val = (htab->ovly_load->root.u.def.section->output_section->vma |
| 1218 | + htab->ovly_load->root.u.def.section->output_offset |
| 1219 | + htab->ovly_load->root.u.def.value |
| 1220 | - (sec->output_section->vma |
| 1221 | + sec->output_offset |
| 1222 | + ent->off + 12)); |
| 1223 | |
| 1224 | if (val + 0x20000 >= 0x40000) |
| 1225 | htab->stub_overflow = TRUE; |
| 1226 | |
| 1227 | bfd_put_32 (sec->owner, BR + ((val << 5) & 0x007fff80), |
| 1228 | sec->contents + ent->off + 12); |
| 1229 | } |
| 1230 | |
| 1231 | if (htab->emit_stub_syms) |
| 1232 | { |
| 1233 | struct elf_link_hash_entry *h; |
| 1234 | size_t len1, len2; |
| 1235 | char *name; |
| 1236 | |
| 1237 | len1 = sizeof ("00000000.ovl_call.") - 1; |
| 1238 | len2 = strlen (ent->root.string); |
| 1239 | name = bfd_malloc (len1 + len2 + 1); |
| 1240 | if (name == NULL) |
| 1241 | return FALSE; |
| 1242 | memcpy (name, "00000000.ovl_call.", len1); |
| 1243 | memcpy (name + len1, ent->root.string, len2 + 1); |
| 1244 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 1245 | if (h == NULL) |
| 1246 | return FALSE; |
| 1247 | if (h->root.type == bfd_link_hash_new) |
| 1248 | { |
| 1249 | h->root.type = bfd_link_hash_defined; |
| 1250 | h->root.u.def.section = sec; |
| 1251 | h->root.u.def.value = ent->off; |
| 1252 | h->size = (ent->delta == 0 |
| 1253 | ? SIZEOF_STUB1 + SIZEOF_STUB2 : SIZEOF_STUB1); |
| 1254 | h->type = STT_FUNC; |
| 1255 | h->ref_regular = 1; |
| 1256 | h->def_regular = 1; |
| 1257 | h->ref_regular_nonweak = 1; |
| 1258 | h->forced_local = 1; |
| 1259 | h->non_elf = 0; |
| 1260 | } |
| 1261 | } |
| 1262 | |
| 1263 | return TRUE; |
| 1264 | } |
| 1265 | |
| 1266 | /* Define an STT_OBJECT symbol. */ |
| 1267 | |
| 1268 | static struct elf_link_hash_entry * |
| 1269 | define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name) |
| 1270 | { |
| 1271 | struct elf_link_hash_entry *h; |
| 1272 | |
| 1273 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 1274 | if (h == NULL) |
| 1275 | return NULL; |
| 1276 | |
| 1277 | if (h->root.type != bfd_link_hash_defined |
| 1278 | || !h->def_regular) |
| 1279 | { |
| 1280 | h->root.type = bfd_link_hash_defined; |
| 1281 | h->root.u.def.section = htab->ovtab; |
| 1282 | h->type = STT_OBJECT; |
| 1283 | h->ref_regular = 1; |
| 1284 | h->def_regular = 1; |
| 1285 | h->ref_regular_nonweak = 1; |
| 1286 | h->non_elf = 0; |
| 1287 | } |
| 1288 | else |
| 1289 | { |
| 1290 | (*_bfd_error_handler) (_("%B is not allowed to define %s"), |
| 1291 | h->root.u.def.section->owner, |
| 1292 | h->root.root.string); |
| 1293 | bfd_set_error (bfd_error_bad_value); |
| 1294 | return NULL; |
| 1295 | } |
| 1296 | |
| 1297 | return h; |
| 1298 | } |
| 1299 | |
| 1300 | /* Fill in all stubs and the overlay tables. */ |
| 1301 | |
| 1302 | bfd_boolean |
| 1303 | spu_elf_build_stubs (struct bfd_link_info *info, int emit_syms, asection *toe) |
| 1304 | { |
| 1305 | struct spu_link_hash_table *htab = spu_hash_table (info); |
| 1306 | struct elf_link_hash_entry *h; |
| 1307 | bfd_byte *p; |
| 1308 | asection *s; |
| 1309 | bfd *obfd; |
| 1310 | unsigned int i; |
| 1311 | |
| 1312 | htab->emit_stub_syms = emit_syms; |
| 1313 | htab->stub->contents = bfd_zalloc (htab->stub->owner, htab->stub->size); |
| 1314 | if (htab->stub->contents == NULL) |
| 1315 | return FALSE; |
| 1316 | |
| 1317 | h = elf_link_hash_lookup (&htab->elf, "__ovly_load", FALSE, FALSE, FALSE); |
| 1318 | htab->ovly_load = h; |
| 1319 | BFD_ASSERT (h != NULL |
| 1320 | && (h->root.type == bfd_link_hash_defined |
| 1321 | || h->root.type == bfd_link_hash_defweak) |
| 1322 | && h->def_regular); |
| 1323 | |
| 1324 | s = h->root.u.def.section->output_section; |
| 1325 | if (spu_elf_section_data (s)->ovl_index) |
| 1326 | { |
| 1327 | (*_bfd_error_handler) (_("%s in overlay section"), |
| 1328 | h->root.u.def.section->owner); |
| 1329 | bfd_set_error (bfd_error_bad_value); |
| 1330 | return FALSE; |
| 1331 | } |
| 1332 | |
| 1333 | /* Write out all the stubs. */ |
| 1334 | bfd_hash_traverse (&htab->stub_hash_table, write_one_stub, htab); |
| 1335 | |
| 1336 | if (htab->stub_overflow) |
| 1337 | { |
| 1338 | (*_bfd_error_handler) (_("overlay stub relocation overflow")); |
| 1339 | bfd_set_error (bfd_error_bad_value); |
| 1340 | return FALSE; |
| 1341 | } |
| 1342 | |
| 1343 | htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size); |
| 1344 | if (htab->ovtab->contents == NULL) |
| 1345 | return FALSE; |
| 1346 | |
| 1347 | /* Write out _ovly_table. */ |
| 1348 | p = htab->ovtab->contents; |
| 1349 | obfd = htab->ovtab->output_section->owner; |
| 1350 | for (s = obfd->sections; s != NULL; s = s->next) |
| 1351 | { |
| 1352 | unsigned int ovl_index = spu_elf_section_data (s)->ovl_index; |
| 1353 | |
| 1354 | if (ovl_index != 0) |
| 1355 | { |
| 1356 | unsigned int lo, hi, mid; |
| 1357 | unsigned long off = (ovl_index - 1) * 16; |
| 1358 | bfd_put_32 (htab->ovtab->owner, s->vma, p + off); |
| 1359 | bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16, p + off + 4); |
| 1360 | /* file_off written later in spu_elf_modify_program_headers. */ |
| 1361 | |
| 1362 | lo = 0; |
| 1363 | hi = htab->num_buf; |
| 1364 | while (lo < hi) |
| 1365 | { |
| 1366 | mid = (lo + hi) >> 1; |
| 1367 | if (htab->ovl_region[2 * mid + 1]->vma |
| 1368 | + htab->ovl_region[2 * mid + 1]->size <= s->vma) |
| 1369 | lo = mid + 1; |
| 1370 | else if (htab->ovl_region[2 * mid]->vma > s->vma) |
| 1371 | hi = mid; |
| 1372 | else |
| 1373 | { |
| 1374 | bfd_put_32 (htab->ovtab->owner, mid + 1, p + off + 12); |
| 1375 | break; |
| 1376 | } |
| 1377 | } |
| 1378 | BFD_ASSERT (lo < hi); |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | /* Write out _ovly_buf_table. */ |
| 1383 | p = htab->ovtab->contents + htab->num_overlays * 16; |
| 1384 | for (i = 0; i < htab->num_buf; i++) |
| 1385 | { |
| 1386 | bfd_put_32 (htab->ovtab->owner, 0, p); |
| 1387 | p += 4; |
| 1388 | } |
| 1389 | |
| 1390 | h = define_ovtab_symbol (htab, "_ovly_table"); |
| 1391 | if (h == NULL) |
| 1392 | return FALSE; |
| 1393 | h->root.u.def.value = 0; |
| 1394 | h->size = htab->num_overlays * 16; |
| 1395 | |
| 1396 | h = define_ovtab_symbol (htab, "_ovly_table_end"); |
| 1397 | if (h == NULL) |
| 1398 | return FALSE; |
| 1399 | h->root.u.def.value = htab->num_overlays * 16; |
| 1400 | h->size = 0; |
| 1401 | |
| 1402 | h = define_ovtab_symbol (htab, "_ovly_buf_table"); |
| 1403 | if (h == NULL) |
| 1404 | return FALSE; |
| 1405 | h->root.u.def.value = htab->num_overlays * 16; |
| 1406 | h->size = htab->num_buf * 4; |
| 1407 | |
| 1408 | h = define_ovtab_symbol (htab, "_ovly_buf_table_end"); |
| 1409 | if (h == NULL) |
| 1410 | return FALSE; |
| 1411 | h->root.u.def.value = htab->num_overlays * 16 + htab->num_buf * 4; |
| 1412 | h->size = 0; |
| 1413 | |
| 1414 | h = define_ovtab_symbol (htab, "_EAR_"); |
| 1415 | if (h == NULL) |
| 1416 | return FALSE; |
| 1417 | h->root.u.def.section = toe; |
| 1418 | h->root.u.def.value = 0; |
| 1419 | h->size = 16; |
| 1420 | |
| 1421 | return TRUE; |
| 1422 | } |
| 1423 | |
| 1424 | /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */ |
| 1425 | |
| 1426 | static bfd_boolean |
| 1427 | spu_elf_relocate_section (bfd *output_bfd, |
| 1428 | struct bfd_link_info *info, |
| 1429 | bfd *input_bfd, |
| 1430 | asection *input_section, |
| 1431 | bfd_byte *contents, |
| 1432 | Elf_Internal_Rela *relocs, |
| 1433 | Elf_Internal_Sym *local_syms, |
| 1434 | asection **local_sections) |
| 1435 | { |
| 1436 | Elf_Internal_Shdr *symtab_hdr; |
| 1437 | struct elf_link_hash_entry **sym_hashes; |
| 1438 | Elf_Internal_Rela *rel, *relend; |
| 1439 | struct spu_link_hash_table *htab; |
| 1440 | bfd_boolean ret = TRUE; |
| 1441 | |
| 1442 | htab = spu_hash_table (info); |
| 1443 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1444 | sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd)); |
| 1445 | |
| 1446 | rel = relocs; |
| 1447 | relend = relocs + input_section->reloc_count; |
| 1448 | for (; rel < relend; rel++) |
| 1449 | { |
| 1450 | int r_type; |
| 1451 | reloc_howto_type *howto; |
| 1452 | unsigned long r_symndx; |
| 1453 | Elf_Internal_Sym *sym; |
| 1454 | asection *sec; |
| 1455 | struct elf_link_hash_entry *h; |
| 1456 | const char *sym_name; |
| 1457 | bfd_vma relocation; |
| 1458 | bfd_vma addend; |
| 1459 | bfd_reloc_status_type r; |
| 1460 | bfd_boolean unresolved_reloc; |
| 1461 | bfd_boolean warned; |
| 1462 | |
| 1463 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1464 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1465 | howto = elf_howto_table + r_type; |
| 1466 | unresolved_reloc = FALSE; |
| 1467 | warned = FALSE; |
| 1468 | |
| 1469 | h = NULL; |
| 1470 | sym = NULL; |
| 1471 | sec = NULL; |
| 1472 | if (r_symndx < symtab_hdr->sh_info) |
| 1473 | { |
| 1474 | sym = local_syms + r_symndx; |
| 1475 | sec = local_sections[r_symndx]; |
| 1476 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 1477 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1478 | } |
| 1479 | else |
| 1480 | { |
| 1481 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1482 | r_symndx, symtab_hdr, sym_hashes, |
| 1483 | h, sec, relocation, |
| 1484 | unresolved_reloc, warned); |
| 1485 | sym_name = h->root.root.string; |
| 1486 | } |
| 1487 | |
| 1488 | if (sec != NULL && elf_discarded_section (sec)) |
| 1489 | { |
| 1490 | /* For relocs against symbols from removed linkonce sections, |
| 1491 | or sections discarded by a linker script, we just want the |
| 1492 | section contents zeroed. Avoid any special processing. */ |
| 1493 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 1494 | rel->r_info = 0; |
| 1495 | rel->r_addend = 0; |
| 1496 | continue; |
| 1497 | } |
| 1498 | |
| 1499 | if (info->relocatable) |
| 1500 | continue; |
| 1501 | |
| 1502 | if (unresolved_reloc) |
| 1503 | { |
| 1504 | (*_bfd_error_handler) |
| 1505 | (_("%B(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 1506 | input_bfd, |
| 1507 | bfd_get_section_name (input_bfd, input_section), |
| 1508 | (long) rel->r_offset, |
| 1509 | howto->name, |
| 1510 | sym_name); |
| 1511 | ret = FALSE; |
| 1512 | } |
| 1513 | |
| 1514 | /* If this symbol is in an overlay area, we may need to relocate |
| 1515 | to the overlay stub. */ |
| 1516 | addend = rel->r_addend; |
| 1517 | if (needs_ovl_stub (sym_name, sec, input_section, htab, |
| 1518 | is_branch (contents + rel->r_offset))) |
| 1519 | { |
| 1520 | char *stub_name; |
| 1521 | struct spu_stub_hash_entry *sh; |
| 1522 | |
| 1523 | stub_name = spu_stub_name (sec, h, rel); |
| 1524 | if (stub_name == NULL) |
| 1525 | return FALSE; |
| 1526 | |
| 1527 | sh = (struct spu_stub_hash_entry *) |
| 1528 | bfd_hash_lookup (&htab->stub_hash_table, stub_name, FALSE, FALSE); |
| 1529 | if (sh != NULL) |
| 1530 | { |
| 1531 | relocation = (htab->stub->output_section->vma |
| 1532 | + htab->stub->output_offset |
| 1533 | + sh->off); |
| 1534 | addend = 0; |
| 1535 | } |
| 1536 | free (stub_name); |
| 1537 | } |
| 1538 | |
| 1539 | r = _bfd_final_link_relocate (howto, |
| 1540 | input_bfd, |
| 1541 | input_section, |
| 1542 | contents, |
| 1543 | rel->r_offset, relocation, addend); |
| 1544 | |
| 1545 | if (r != bfd_reloc_ok) |
| 1546 | { |
| 1547 | const char *msg = (const char *) 0; |
| 1548 | |
| 1549 | switch (r) |
| 1550 | { |
| 1551 | case bfd_reloc_overflow: |
| 1552 | if (!((*info->callbacks->reloc_overflow) |
| 1553 | (info, (h ? &h->root : NULL), sym_name, howto->name, |
| 1554 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) |
| 1555 | return FALSE; |
| 1556 | break; |
| 1557 | |
| 1558 | case bfd_reloc_undefined: |
| 1559 | if (!((*info->callbacks->undefined_symbol) |
| 1560 | (info, sym_name, input_bfd, input_section, |
| 1561 | rel->r_offset, TRUE))) |
| 1562 | return FALSE; |
| 1563 | break; |
| 1564 | |
| 1565 | case bfd_reloc_outofrange: |
| 1566 | msg = _("internal error: out of range error"); |
| 1567 | goto common_error; |
| 1568 | |
| 1569 | case bfd_reloc_notsupported: |
| 1570 | msg = _("internal error: unsupported relocation error"); |
| 1571 | goto common_error; |
| 1572 | |
| 1573 | case bfd_reloc_dangerous: |
| 1574 | msg = _("internal error: dangerous error"); |
| 1575 | goto common_error; |
| 1576 | |
| 1577 | default: |
| 1578 | msg = _("internal error: unknown error"); |
| 1579 | /* fall through */ |
| 1580 | |
| 1581 | common_error: |
| 1582 | if (!((*info->callbacks->warning) |
| 1583 | (info, msg, sym_name, input_bfd, input_section, |
| 1584 | rel->r_offset))) |
| 1585 | return FALSE; |
| 1586 | break; |
| 1587 | } |
| 1588 | } |
| 1589 | } |
| 1590 | |
| 1591 | return ret; |
| 1592 | } |
| 1593 | |
| 1594 | /* Adjust _SPUEAR_ syms to point at their overlay stubs. */ |
| 1595 | |
| 1596 | static bfd_boolean |
| 1597 | spu_elf_output_symbol_hook (struct bfd_link_info *info, |
| 1598 | const char *sym_name ATTRIBUTE_UNUSED, |
| 1599 | Elf_Internal_Sym *sym, |
| 1600 | asection *sym_sec ATTRIBUTE_UNUSED, |
| 1601 | struct elf_link_hash_entry *h) |
| 1602 | { |
| 1603 | struct spu_link_hash_table *htab = spu_hash_table (info); |
| 1604 | |
| 1605 | if (!info->relocatable |
| 1606 | && htab->num_overlays != 0 |
| 1607 | && h != NULL |
| 1608 | && (h->root.type == bfd_link_hash_defined |
| 1609 | || h->root.type == bfd_link_hash_defweak) |
| 1610 | && h->def_regular |
| 1611 | && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0) |
| 1612 | { |
| 1613 | static Elf_Internal_Rela zero_rel; |
| 1614 | char *stub_name = spu_stub_name (h->root.u.def.section, h, &zero_rel); |
| 1615 | struct spu_stub_hash_entry *sh; |
| 1616 | |
| 1617 | if (stub_name == NULL) |
| 1618 | return FALSE; |
| 1619 | sh = (struct spu_stub_hash_entry *) |
| 1620 | bfd_hash_lookup (&htab->stub_hash_table, stub_name, FALSE, FALSE); |
| 1621 | free (stub_name); |
| 1622 | if (sh == NULL) |
| 1623 | return TRUE; |
| 1624 | sym->st_shndx |
| 1625 | = _bfd_elf_section_from_bfd_section (htab->stub->output_section->owner, |
| 1626 | htab->stub->output_section); |
| 1627 | sym->st_value = (htab->stub->output_section->vma |
| 1628 | + htab->stub->output_offset |
| 1629 | + sh->off); |
| 1630 | } |
| 1631 | |
| 1632 | return TRUE; |
| 1633 | } |
| 1634 | |
| 1635 | static int spu_plugin = 0; |
| 1636 | |
| 1637 | void |
| 1638 | spu_elf_plugin (int val) |
| 1639 | { |
| 1640 | spu_plugin = val; |
| 1641 | } |
| 1642 | |
| 1643 | /* Set ELF header e_type for plugins. */ |
| 1644 | |
| 1645 | static void |
| 1646 | spu_elf_post_process_headers (bfd *abfd, |
| 1647 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 1648 | { |
| 1649 | if (spu_plugin) |
| 1650 | { |
| 1651 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); |
| 1652 | |
| 1653 | i_ehdrp->e_type = ET_DYN; |
| 1654 | } |
| 1655 | } |
| 1656 | |
| 1657 | /* We may add an extra PT_LOAD segment for .toe. We also need extra |
| 1658 | segments for overlays. */ |
| 1659 | |
| 1660 | static int |
| 1661 | spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info) |
| 1662 | { |
| 1663 | struct spu_link_hash_table *htab = spu_hash_table (info); |
| 1664 | int extra = htab->num_overlays; |
| 1665 | asection *sec; |
| 1666 | |
| 1667 | if (extra) |
| 1668 | ++extra; |
| 1669 | |
| 1670 | sec = bfd_get_section_by_name (abfd, ".toe"); |
| 1671 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 1672 | ++extra; |
| 1673 | |
| 1674 | return extra; |
| 1675 | } |
| 1676 | |
| 1677 | /* Remove .toe section from other PT_LOAD segments and put it in |
| 1678 | a segment of its own. Put overlays in separate segments too. */ |
| 1679 | |
| 1680 | static bfd_boolean |
| 1681 | spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info) |
| 1682 | { |
| 1683 | asection *toe, *s; |
| 1684 | struct elf_segment_map *m; |
| 1685 | unsigned int i; |
| 1686 | |
| 1687 | if (info == NULL) |
| 1688 | return TRUE; |
| 1689 | |
| 1690 | toe = bfd_get_section_by_name (abfd, ".toe"); |
| 1691 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 1692 | if (m->p_type == PT_LOAD && m->count > 1) |
| 1693 | for (i = 0; i < m->count; i++) |
| 1694 | if ((s = m->sections[i]) == toe |
| 1695 | || spu_elf_section_data (s)->ovl_index != 0) |
| 1696 | { |
| 1697 | struct elf_segment_map *m2; |
| 1698 | bfd_vma amt; |
| 1699 | |
| 1700 | if (i + 1 < m->count) |
| 1701 | { |
| 1702 | amt = sizeof (struct elf_segment_map); |
| 1703 | amt += (m->count - (i + 2)) * sizeof (m->sections[0]); |
| 1704 | m2 = bfd_zalloc (abfd, amt); |
| 1705 | if (m2 == NULL) |
| 1706 | return FALSE; |
| 1707 | m2->count = m->count - (i + 1); |
| 1708 | memcpy (m2->sections, m->sections + i + 1, |
| 1709 | m2->count * sizeof (m->sections[0])); |
| 1710 | m2->p_type = PT_LOAD; |
| 1711 | m2->next = m->next; |
| 1712 | m->next = m2; |
| 1713 | } |
| 1714 | m->count = 1; |
| 1715 | if (i != 0) |
| 1716 | { |
| 1717 | m->count = i; |
| 1718 | amt = sizeof (struct elf_segment_map); |
| 1719 | m2 = bfd_zalloc (abfd, amt); |
| 1720 | if (m2 == NULL) |
| 1721 | return FALSE; |
| 1722 | m2->p_type = PT_LOAD; |
| 1723 | m2->count = 1; |
| 1724 | m2->sections[0] = s; |
| 1725 | m2->next = m->next; |
| 1726 | m->next = m2; |
| 1727 | } |
| 1728 | break; |
| 1729 | } |
| 1730 | |
| 1731 | return TRUE; |
| 1732 | } |
| 1733 | |
| 1734 | /* Check that all loadable section VMAs lie in the range |
| 1735 | LO .. HI inclusive. */ |
| 1736 | |
| 1737 | asection * |
| 1738 | spu_elf_check_vma (bfd *abfd, bfd_vma lo, bfd_vma hi) |
| 1739 | { |
| 1740 | struct elf_segment_map *m; |
| 1741 | unsigned int i; |
| 1742 | |
| 1743 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 1744 | if (m->p_type == PT_LOAD) |
| 1745 | for (i = 0; i < m->count; i++) |
| 1746 | if (m->sections[i]->size != 0 |
| 1747 | && (m->sections[i]->vma < lo |
| 1748 | || m->sections[i]->vma > hi |
| 1749 | || m->sections[i]->vma + m->sections[i]->size - 1 > hi)) |
| 1750 | return m->sections[i]; |
| 1751 | |
| 1752 | return NULL; |
| 1753 | } |
| 1754 | |
| 1755 | /* Tweak phdrs before writing them out. */ |
| 1756 | |
| 1757 | static int |
| 1758 | spu_elf_modify_program_headers (bfd *abfd, struct bfd_link_info *info) |
| 1759 | { |
| 1760 | const struct elf_backend_data *bed; |
| 1761 | struct elf_obj_tdata *tdata; |
| 1762 | Elf_Internal_Phdr *phdr, *last; |
| 1763 | struct spu_link_hash_table *htab; |
| 1764 | unsigned int count; |
| 1765 | unsigned int i; |
| 1766 | |
| 1767 | if (info == NULL) |
| 1768 | return TRUE; |
| 1769 | |
| 1770 | bed = get_elf_backend_data (abfd); |
| 1771 | tdata = elf_tdata (abfd); |
| 1772 | phdr = tdata->phdr; |
| 1773 | count = tdata->program_header_size / bed->s->sizeof_phdr; |
| 1774 | htab = spu_hash_table (info); |
| 1775 | if (htab->num_overlays != 0) |
| 1776 | { |
| 1777 | struct elf_segment_map *m; |
| 1778 | unsigned int o; |
| 1779 | |
| 1780 | for (i = 0, m = elf_tdata (abfd)->segment_map; m; ++i, m = m->next) |
| 1781 | if (m->count != 0 |
| 1782 | && (o = spu_elf_section_data (m->sections[0])->ovl_index) != 0) |
| 1783 | { |
| 1784 | /* Mark this as an overlay header. */ |
| 1785 | phdr[i].p_flags |= PF_OVERLAY; |
| 1786 | |
| 1787 | if (htab->ovtab != NULL && htab->ovtab->size != 0) |
| 1788 | { |
| 1789 | bfd_byte *p = htab->ovtab->contents; |
| 1790 | unsigned int off = (o - 1) * 16 + 8; |
| 1791 | |
| 1792 | /* Write file_off into _ovly_table. */ |
| 1793 | bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off); |
| 1794 | } |
| 1795 | } |
| 1796 | } |
| 1797 | |
| 1798 | /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples |
| 1799 | of 16. This should always be possible when using the standard |
| 1800 | linker scripts, but don't create overlapping segments if |
| 1801 | someone is playing games with linker scripts. */ |
| 1802 | last = NULL; |
| 1803 | for (i = count; i-- != 0; ) |
| 1804 | if (phdr[i].p_type == PT_LOAD) |
| 1805 | { |
| 1806 | unsigned adjust; |
| 1807 | |
| 1808 | adjust = -phdr[i].p_filesz & 15; |
| 1809 | if (adjust != 0 |
| 1810 | && last != NULL |
| 1811 | && phdr[i].p_offset + phdr[i].p_filesz > last->p_offset - adjust) |
| 1812 | break; |
| 1813 | |
| 1814 | adjust = -phdr[i].p_memsz & 15; |
| 1815 | if (adjust != 0 |
| 1816 | && last != NULL |
| 1817 | && phdr[i].p_filesz != 0 |
| 1818 | && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust |
| 1819 | && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr) |
| 1820 | break; |
| 1821 | |
| 1822 | if (phdr[i].p_filesz != 0) |
| 1823 | last = &phdr[i]; |
| 1824 | } |
| 1825 | |
| 1826 | if (i == (unsigned int) -1) |
| 1827 | for (i = count; i-- != 0; ) |
| 1828 | if (phdr[i].p_type == PT_LOAD) |
| 1829 | { |
| 1830 | unsigned adjust; |
| 1831 | |
| 1832 | adjust = -phdr[i].p_filesz & 15; |
| 1833 | phdr[i].p_filesz += adjust; |
| 1834 | |
| 1835 | adjust = -phdr[i].p_memsz & 15; |
| 1836 | phdr[i].p_memsz += adjust; |
| 1837 | } |
| 1838 | |
| 1839 | return TRUE; |
| 1840 | } |
| 1841 | |
| 1842 | /* Arrange for our linker created section to be output. */ |
| 1843 | |
| 1844 | static bfd_boolean |
| 1845 | spu_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, |
| 1846 | Elf_Internal_Shdr *i_shdrp) |
| 1847 | { |
| 1848 | asection *sec; |
| 1849 | |
| 1850 | sec = i_shdrp->bfd_section; |
| 1851 | if (sec != NULL |
| 1852 | && (sec->flags & SEC_LINKER_CREATED) != 0 |
| 1853 | && sec->name != NULL |
| 1854 | && strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0) |
| 1855 | i_shdrp->contents = sec->contents; |
| 1856 | |
| 1857 | return TRUE; |
| 1858 | } |
| 1859 | |
| 1860 | #define TARGET_BIG_SYM bfd_elf32_spu_vec |
| 1861 | #define TARGET_BIG_NAME "elf32-spu" |
| 1862 | #define ELF_ARCH bfd_arch_spu |
| 1863 | #define ELF_MACHINE_CODE EM_SPU |
| 1864 | /* This matches the alignment need for DMA. */ |
| 1865 | #define ELF_MAXPAGESIZE 0x80 |
| 1866 | #define elf_backend_rela_normal 1 |
| 1867 | #define elf_backend_can_gc_sections 1 |
| 1868 | |
| 1869 | #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup |
| 1870 | #define bfd_elf32_bfd_reloc_name_lookup spu_elf_reloc_name_lookup |
| 1871 | #define elf_info_to_howto spu_elf_info_to_howto |
| 1872 | #define elf_backend_gc_mark_hook spu_elf_gc_mark_hook |
| 1873 | #define elf_backend_relocate_section spu_elf_relocate_section |
| 1874 | #define elf_backend_symbol_processing spu_elf_backend_symbol_processing |
| 1875 | #define elf_backend_link_output_symbol_hook spu_elf_output_symbol_hook |
| 1876 | #define bfd_elf32_new_section_hook spu_elf_new_section_hook |
| 1877 | #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create |
| 1878 | #define bfd_elf32_bfd_link_hash_table_free spu_elf_link_hash_table_free |
| 1879 | |
| 1880 | #define elf_backend_additional_program_headers spu_elf_additional_program_headers |
| 1881 | #define elf_backend_modify_segment_map spu_elf_modify_segment_map |
| 1882 | #define elf_backend_modify_program_headers spu_elf_modify_program_headers |
| 1883 | #define elf_backend_post_process_headers spu_elf_post_process_headers |
| 1884 | #define elf_backend_section_processing spu_elf_section_processing |
| 1885 | #define elf_backend_special_sections spu_elf_special_sections |
| 1886 | |
| 1887 | #include "elf32-target.h" |