| 1 | /* POWER/PowerPC XCOFF linker support. |
| 2 | Copyright 1995, 1996, 1997 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support. |
| 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 "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "coff/internal.h" |
| 26 | #include "libcoff.h" |
| 27 | |
| 28 | /* This file holds the XCOFF linker code. */ |
| 29 | |
| 30 | #define STRING_SIZE_SIZE (4) |
| 31 | |
| 32 | /* In order to support linking different object file formats into an |
| 33 | XCOFF format, we need to be able to determine whether a particular |
| 34 | bfd_target is an XCOFF vector. FIXME: We need to rethink this |
| 35 | whole approach. */ |
| 36 | #define XCOFF_XVECP(xv) \ |
| 37 | (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \ |
| 38 | || strcmp ((xv)->name, "xcoff-powermac") == 0) |
| 39 | |
| 40 | /* Get the XCOFF hash table entries for a BFD. */ |
| 41 | #define obj_xcoff_sym_hashes(bfd) \ |
| 42 | ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd)) |
| 43 | |
| 44 | /* XCOFF relocation types. These probably belong in a header file |
| 45 | somewhere. The relocations are described in the function |
| 46 | _bfd_ppc_xcoff_relocate_section in this file. */ |
| 47 | |
| 48 | #define R_POS (0x00) |
| 49 | #define R_NEG (0x01) |
| 50 | #define R_REL (0x02) |
| 51 | #define R_TOC (0x03) |
| 52 | #define R_RTB (0x04) |
| 53 | #define R_GL (0x05) |
| 54 | #define R_TCL (0x06) |
| 55 | #define R_BA (0x08) |
| 56 | #define R_BR (0x0a) |
| 57 | #define R_RL (0x0c) |
| 58 | #define R_RLA (0x0d) |
| 59 | #define R_REF (0x0f) |
| 60 | #define R_TRL (0x12) |
| 61 | #define R_TRLA (0x13) |
| 62 | #define R_RRTBI (0x14) |
| 63 | #define R_RRTBA (0x15) |
| 64 | #define R_CAI (0x16) |
| 65 | #define R_CREL (0x17) |
| 66 | #define R_RBA (0x18) |
| 67 | #define R_RBAC (0x19) |
| 68 | #define R_RBR (0x1a) |
| 69 | #define R_RBRC (0x1b) |
| 70 | |
| 71 | /* The first word of global linkage code. This must be modified by |
| 72 | filling in the correct TOC offset. */ |
| 73 | |
| 74 | #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */ |
| 75 | |
| 76 | /* The remaining words of global linkage code. */ |
| 77 | |
| 78 | static unsigned long xcoff_glink_code[] = |
| 79 | { |
| 80 | 0x90410014, /* stw r2,20(r1) */ |
| 81 | 0x800c0000, /* lwz r0,0(r12) */ |
| 82 | 0x804c0004, /* lwz r2,4(r12) */ |
| 83 | 0x7c0903a6, /* mtctr r0 */ |
| 84 | 0x4e800420, /* bctr */ |
| 85 | 0x0, /* start of traceback table */ |
| 86 | 0x000c8000, /* traceback table */ |
| 87 | 0x0 /* traceback table */ |
| 88 | }; |
| 89 | |
| 90 | #define XCOFF_GLINK_SIZE \ |
| 91 | (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4) |
| 92 | |
| 93 | /* We reuse the SEC_ROM flag as a mark flag for garbage collection. |
| 94 | This flag will only be used on input sections. */ |
| 95 | |
| 96 | #define SEC_MARK (SEC_ROM) |
| 97 | |
| 98 | /* The ldhdr structure. This appears at the start of the .loader |
| 99 | section. */ |
| 100 | |
| 101 | struct internal_ldhdr |
| 102 | { |
| 103 | /* The version number: currently always 1. */ |
| 104 | unsigned long l_version; |
| 105 | /* The number of symbol table entries. */ |
| 106 | bfd_size_type l_nsyms; |
| 107 | /* The number of relocation table entries. */ |
| 108 | bfd_size_type l_nreloc; |
| 109 | /* The length of the import file string table. */ |
| 110 | bfd_size_type l_istlen; |
| 111 | /* The number of import files. */ |
| 112 | bfd_size_type l_nimpid; |
| 113 | /* The offset from the start of the .loader section to the first |
| 114 | entry in the import file table. */ |
| 115 | bfd_size_type l_impoff; |
| 116 | /* The length of the string table. */ |
| 117 | bfd_size_type l_stlen; |
| 118 | /* The offset from the start of the .loader section to the first |
| 119 | entry in the string table. */ |
| 120 | bfd_size_type l_stoff; |
| 121 | }; |
| 122 | |
| 123 | struct external_ldhdr |
| 124 | { |
| 125 | bfd_byte l_version[4]; |
| 126 | bfd_byte l_nsyms[4]; |
| 127 | bfd_byte l_nreloc[4]; |
| 128 | bfd_byte l_istlen[4]; |
| 129 | bfd_byte l_nimpid[4]; |
| 130 | bfd_byte l_impoff[4]; |
| 131 | bfd_byte l_stlen[4]; |
| 132 | bfd_byte l_stoff[4]; |
| 133 | }; |
| 134 | |
| 135 | #define LDHDRSZ (8 * 4) |
| 136 | |
| 137 | /* The ldsym structure. This is used to represent a symbol in the |
| 138 | .loader section. */ |
| 139 | |
| 140 | struct internal_ldsym |
| 141 | { |
| 142 | union |
| 143 | { |
| 144 | /* The symbol name if <= SYMNMLEN characters. */ |
| 145 | char _l_name[SYMNMLEN]; |
| 146 | struct |
| 147 | { |
| 148 | /* Zero if the symbol name is more than SYMNMLEN characters. */ |
| 149 | long _l_zeroes; |
| 150 | /* The offset in the string table if the symbol name is more |
| 151 | than SYMNMLEN characters. */ |
| 152 | long _l_offset; |
| 153 | } _l_l; |
| 154 | } _l; |
| 155 | /* The symbol value. */ |
| 156 | bfd_vma l_value; |
| 157 | /* The symbol section number. */ |
| 158 | short l_scnum; |
| 159 | /* The symbol type and flags. */ |
| 160 | char l_smtype; |
| 161 | /* The symbol storage class. */ |
| 162 | char l_smclas; |
| 163 | /* The import file ID. */ |
| 164 | bfd_size_type l_ifile; |
| 165 | /* Offset to the parameter type check string. */ |
| 166 | bfd_size_type l_parm; |
| 167 | }; |
| 168 | |
| 169 | struct external_ldsym |
| 170 | { |
| 171 | union |
| 172 | { |
| 173 | bfd_byte _l_name[SYMNMLEN]; |
| 174 | struct |
| 175 | { |
| 176 | bfd_byte _l_zeroes[4]; |
| 177 | bfd_byte _l_offset[4]; |
| 178 | } _l_l; |
| 179 | } _l; |
| 180 | bfd_byte l_value[4]; |
| 181 | bfd_byte l_scnum[2]; |
| 182 | bfd_byte l_smtype[1]; |
| 183 | bfd_byte l_smclas[1]; |
| 184 | bfd_byte l_ifile[4]; |
| 185 | bfd_byte l_parm[4]; |
| 186 | }; |
| 187 | |
| 188 | #define LDSYMSZ (8 + 3 * 4 + 2 + 2) |
| 189 | |
| 190 | /* These flags are for the l_smtype field (the lower three bits are an |
| 191 | XTY_* value). */ |
| 192 | |
| 193 | /* Imported symbol. */ |
| 194 | #define L_IMPORT (0x40) |
| 195 | /* Entry point. */ |
| 196 | #define L_ENTRY (0x20) |
| 197 | /* Exported symbol. */ |
| 198 | #define L_EXPORT (0x10) |
| 199 | |
| 200 | /* The ldrel structure. This is used to represent a reloc in the |
| 201 | .loader section. */ |
| 202 | |
| 203 | struct internal_ldrel |
| 204 | { |
| 205 | /* The reloc address. */ |
| 206 | bfd_vma l_vaddr; |
| 207 | /* The symbol table index in the .loader section symbol table. */ |
| 208 | bfd_size_type l_symndx; |
| 209 | /* The relocation type and size. */ |
| 210 | short l_rtype; |
| 211 | /* The section number this relocation applies to. */ |
| 212 | short l_rsecnm; |
| 213 | }; |
| 214 | |
| 215 | struct external_ldrel |
| 216 | { |
| 217 | bfd_byte l_vaddr[4]; |
| 218 | bfd_byte l_symndx[4]; |
| 219 | bfd_byte l_rtype[2]; |
| 220 | bfd_byte l_rsecnm[2]; |
| 221 | }; |
| 222 | |
| 223 | #define LDRELSZ (2 * 4 + 2 * 2) |
| 224 | |
| 225 | /* The list of import files. */ |
| 226 | |
| 227 | struct xcoff_import_file |
| 228 | { |
| 229 | /* The next entry in the list. */ |
| 230 | struct xcoff_import_file *next; |
| 231 | /* The path. */ |
| 232 | const char *path; |
| 233 | /* The file name. */ |
| 234 | const char *file; |
| 235 | /* The member name. */ |
| 236 | const char *member; |
| 237 | }; |
| 238 | |
| 239 | /* An entry in the XCOFF linker hash table. */ |
| 240 | |
| 241 | struct xcoff_link_hash_entry |
| 242 | { |
| 243 | struct bfd_link_hash_entry root; |
| 244 | |
| 245 | /* Symbol index in output file. Set to -1 initially. Set to -2 if |
| 246 | there is a reloc against this symbol. */ |
| 247 | long indx; |
| 248 | |
| 249 | /* If we have created a TOC entry for this symbol, this is the .tc |
| 250 | section which holds it. */ |
| 251 | asection *toc_section; |
| 252 | |
| 253 | union |
| 254 | { |
| 255 | /* If we have created a TOC entry (the XCOFF_SET_TOC flag is |
| 256 | set), this is the offset in toc_section. */ |
| 257 | bfd_vma toc_offset; |
| 258 | /* If the TOC entry comes from an input file, this is set to the |
| 259 | symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */ |
| 260 | long toc_indx; |
| 261 | } u; |
| 262 | |
| 263 | /* If this symbol is a function entry point which is called, this |
| 264 | field holds a pointer to the function descriptor. If this symbol |
| 265 | is a function descriptor, this field holds a pointer to the |
| 266 | function entry point. */ |
| 267 | struct xcoff_link_hash_entry *descriptor; |
| 268 | |
| 269 | /* The .loader symbol table entry, if there is one. */ |
| 270 | struct internal_ldsym *ldsym; |
| 271 | |
| 272 | /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table |
| 273 | index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set, |
| 274 | this is the l_ifile value. */ |
| 275 | long ldindx; |
| 276 | |
| 277 | /* Some linker flags. */ |
| 278 | unsigned short flags; |
| 279 | /* Symbol is referenced by a regular object. */ |
| 280 | #define XCOFF_REF_REGULAR (01) |
| 281 | /* Symbol is defined by a regular object. */ |
| 282 | #define XCOFF_DEF_REGULAR (02) |
| 283 | /* Symbol is defined by a dynamic object. */ |
| 284 | #define XCOFF_DEF_DYNAMIC (04) |
| 285 | /* Symbol is used in a reloc being copied into the .loader section. */ |
| 286 | #define XCOFF_LDREL (010) |
| 287 | /* Symbol is the entry point. */ |
| 288 | #define XCOFF_ENTRY (020) |
| 289 | /* Symbol is called; this is, it appears in a R_BR reloc. */ |
| 290 | #define XCOFF_CALLED (040) |
| 291 | /* Symbol needs the TOC entry filled in. */ |
| 292 | #define XCOFF_SET_TOC (0100) |
| 293 | /* Symbol is explicitly imported. */ |
| 294 | #define XCOFF_IMPORT (0200) |
| 295 | /* Symbol is explicitly exported. */ |
| 296 | #define XCOFF_EXPORT (0400) |
| 297 | /* Symbol has been processed by xcoff_build_ldsyms. */ |
| 298 | #define XCOFF_BUILT_LDSYM (01000) |
| 299 | /* Symbol is mentioned by a section which was not garbage collected. */ |
| 300 | #define XCOFF_MARK (02000) |
| 301 | /* Symbol size is recorded in size_list list from hash table. */ |
| 302 | #define XCOFF_HAS_SIZE (04000) |
| 303 | /* Symbol is a function descriptor. */ |
| 304 | #define XCOFF_DESCRIPTOR (010000) |
| 305 | /* Multiple definitions have been for the symbol. */ |
| 306 | #define XCOFF_MULTIPLY_DEFINED (020000) |
| 307 | |
| 308 | /* The storage mapping class. */ |
| 309 | unsigned char smclas; |
| 310 | }; |
| 311 | |
| 312 | /* The XCOFF linker hash table. */ |
| 313 | |
| 314 | struct xcoff_link_hash_table |
| 315 | { |
| 316 | struct bfd_link_hash_table root; |
| 317 | |
| 318 | /* The .debug string hash table. We need to compute this while |
| 319 | reading the input files, so that we know how large the .debug |
| 320 | section will be before we assign section positions. */ |
| 321 | struct bfd_strtab_hash *debug_strtab; |
| 322 | |
| 323 | /* The .debug section we will use for the final output. */ |
| 324 | asection *debug_section; |
| 325 | |
| 326 | /* The .loader section we will use for the final output. */ |
| 327 | asection *loader_section; |
| 328 | |
| 329 | /* A count of non TOC relative relocs which will need to be |
| 330 | allocated in the .loader section. */ |
| 331 | size_t ldrel_count; |
| 332 | |
| 333 | /* The .loader section header. */ |
| 334 | struct internal_ldhdr ldhdr; |
| 335 | |
| 336 | /* The .gl section we use to hold global linkage code. */ |
| 337 | asection *linkage_section; |
| 338 | |
| 339 | /* The .tc section we use to hold toc entries we build for global |
| 340 | linkage code. */ |
| 341 | asection *toc_section; |
| 342 | |
| 343 | /* The .ds section we use to hold function descriptors which we |
| 344 | create for exported symbols. */ |
| 345 | asection *descriptor_section; |
| 346 | |
| 347 | /* The list of import files. */ |
| 348 | struct xcoff_import_file *imports; |
| 349 | |
| 350 | /* Required alignment of sections within the output file. */ |
| 351 | unsigned long file_align; |
| 352 | |
| 353 | /* Whether the .text section must be read-only. */ |
| 354 | boolean textro; |
| 355 | |
| 356 | /* Whether garbage collection was done. */ |
| 357 | boolean gc; |
| 358 | |
| 359 | /* A linked list of symbols for which we have size information. */ |
| 360 | struct xcoff_link_size_list |
| 361 | { |
| 362 | struct xcoff_link_size_list *next; |
| 363 | struct xcoff_link_hash_entry *h; |
| 364 | bfd_size_type size; |
| 365 | } *size_list; |
| 366 | |
| 367 | /* Magic sections: _text, _etext, _data, _edata, _end, end. */ |
| 368 | asection *special_sections[6]; |
| 369 | }; |
| 370 | |
| 371 | /* Information we keep for each section in the output file during the |
| 372 | final link phase. */ |
| 373 | |
| 374 | struct xcoff_link_section_info |
| 375 | { |
| 376 | /* The relocs to be output. */ |
| 377 | struct internal_reloc *relocs; |
| 378 | /* For each reloc against a global symbol whose index was not known |
| 379 | when the reloc was handled, the global hash table entry. */ |
| 380 | struct xcoff_link_hash_entry **rel_hashes; |
| 381 | /* If there is a TOC relative reloc against a global symbol, and the |
| 382 | index of the TOC symbol is not known when the reloc was handled, |
| 383 | an entry is added to this linked list. This is not an array, |
| 384 | like rel_hashes, because this case is quite uncommon. */ |
| 385 | struct xcoff_toc_rel_hash |
| 386 | { |
| 387 | struct xcoff_toc_rel_hash *next; |
| 388 | struct xcoff_link_hash_entry *h; |
| 389 | struct internal_reloc *rel; |
| 390 | } *toc_rel_hashes; |
| 391 | }; |
| 392 | |
| 393 | /* Information that we pass around while doing the final link step. */ |
| 394 | |
| 395 | struct xcoff_final_link_info |
| 396 | { |
| 397 | /* General link information. */ |
| 398 | struct bfd_link_info *info; |
| 399 | /* Output BFD. */ |
| 400 | bfd *output_bfd; |
| 401 | /* Hash table for long symbol names. */ |
| 402 | struct bfd_strtab_hash *strtab; |
| 403 | /* Array of information kept for each output section, indexed by the |
| 404 | target_index field. */ |
| 405 | struct xcoff_link_section_info *section_info; |
| 406 | /* Symbol index of last C_FILE symbol (-1 if none). */ |
| 407 | long last_file_index; |
| 408 | /* Contents of last C_FILE symbol. */ |
| 409 | struct internal_syment last_file; |
| 410 | /* Symbol index of TOC symbol. */ |
| 411 | long toc_symindx; |
| 412 | /* Start of .loader symbols. */ |
| 413 | struct external_ldsym *ldsym; |
| 414 | /* Next .loader reloc to swap out. */ |
| 415 | struct external_ldrel *ldrel; |
| 416 | /* File position of start of line numbers. */ |
| 417 | file_ptr line_filepos; |
| 418 | /* Buffer large enough to hold swapped symbols of any input file. */ |
| 419 | struct internal_syment *internal_syms; |
| 420 | /* Buffer large enough to hold output indices of symbols of any |
| 421 | input file. */ |
| 422 | long *sym_indices; |
| 423 | /* Buffer large enough to hold output symbols for any input file. */ |
| 424 | bfd_byte *outsyms; |
| 425 | /* Buffer large enough to hold external line numbers for any input |
| 426 | section. */ |
| 427 | bfd_byte *linenos; |
| 428 | /* Buffer large enough to hold any input section. */ |
| 429 | bfd_byte *contents; |
| 430 | /* Buffer large enough to hold external relocs of any input section. */ |
| 431 | bfd_byte *external_relocs; |
| 432 | }; |
| 433 | |
| 434 | static void xcoff_swap_ldhdr_in |
| 435 | PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *)); |
| 436 | static void xcoff_swap_ldhdr_out |
| 437 | PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *)); |
| 438 | static void xcoff_swap_ldsym_in |
| 439 | PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *)); |
| 440 | static void xcoff_swap_ldsym_out |
| 441 | PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *)); |
| 442 | static void xcoff_swap_ldrel_in |
| 443 | PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *)); |
| 444 | static void xcoff_swap_ldrel_out |
| 445 | PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *)); |
| 446 | static struct bfd_hash_entry *xcoff_link_hash_newfunc |
| 447 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 448 | static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *)); |
| 449 | static struct internal_reloc *xcoff_read_internal_relocs |
| 450 | PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean, |
| 451 | struct internal_reloc *)); |
| 452 | static boolean xcoff_link_add_object_symbols |
| 453 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 454 | static boolean xcoff_link_check_archive_element |
| 455 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| 456 | static boolean xcoff_link_check_ar_symbols |
| 457 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| 458 | static boolean xcoff_link_check_dynamic_ar_symbols |
| 459 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| 460 | static bfd_size_type xcoff_find_reloc |
| 461 | PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma)); |
| 462 | static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); |
| 463 | static boolean xcoff_link_add_dynamic_symbols |
| 464 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 465 | static boolean xcoff_mark_symbol |
| 466 | PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *)); |
| 467 | static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *)); |
| 468 | static void xcoff_sweep PARAMS ((struct bfd_link_info *)); |
| 469 | static boolean xcoff_build_ldsyms |
| 470 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); |
| 471 | static boolean xcoff_link_input_bfd |
| 472 | PARAMS ((struct xcoff_final_link_info *, bfd *)); |
| 473 | static boolean xcoff_write_global_symbol |
| 474 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); |
| 475 | static boolean xcoff_reloc_link_order |
| 476 | PARAMS ((bfd *, struct xcoff_final_link_info *, asection *, |
| 477 | struct bfd_link_order *)); |
| 478 | static int xcoff_sort_relocs PARAMS ((const PTR, const PTR)); |
| 479 | \f |
| 480 | /* Routines to swap information in the XCOFF .loader section. If we |
| 481 | ever need to write an XCOFF loader, this stuff will need to be |
| 482 | moved to another file shared by the linker (which XCOFF calls the |
| 483 | ``binder'') and the loader. */ |
| 484 | |
| 485 | /* Swap in the ldhdr structure. */ |
| 486 | |
| 487 | static void |
| 488 | xcoff_swap_ldhdr_in (abfd, src, dst) |
| 489 | bfd *abfd; |
| 490 | const struct external_ldhdr *src; |
| 491 | struct internal_ldhdr *dst; |
| 492 | { |
| 493 | dst->l_version = bfd_get_32 (abfd, src->l_version); |
| 494 | dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms); |
| 495 | dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc); |
| 496 | dst->l_istlen = bfd_get_32 (abfd, src->l_istlen); |
| 497 | dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid); |
| 498 | dst->l_impoff = bfd_get_32 (abfd, src->l_impoff); |
| 499 | dst->l_stlen = bfd_get_32 (abfd, src->l_stlen); |
| 500 | dst->l_stoff = bfd_get_32 (abfd, src->l_stoff); |
| 501 | } |
| 502 | |
| 503 | /* Swap out the ldhdr structure. */ |
| 504 | |
| 505 | static void |
| 506 | xcoff_swap_ldhdr_out (abfd, src, dst) |
| 507 | bfd *abfd; |
| 508 | const struct internal_ldhdr *src; |
| 509 | struct external_ldhdr *dst; |
| 510 | { |
| 511 | bfd_put_32 (abfd, src->l_version, dst->l_version); |
| 512 | bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms); |
| 513 | bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc); |
| 514 | bfd_put_32 (abfd, src->l_istlen, dst->l_istlen); |
| 515 | bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid); |
| 516 | bfd_put_32 (abfd, src->l_impoff, dst->l_impoff); |
| 517 | bfd_put_32 (abfd, src->l_stlen, dst->l_stlen); |
| 518 | bfd_put_32 (abfd, src->l_stoff, dst->l_stoff); |
| 519 | } |
| 520 | |
| 521 | /* Swap in the ldsym structure. */ |
| 522 | |
| 523 | static void |
| 524 | xcoff_swap_ldsym_in (abfd, src, dst) |
| 525 | bfd *abfd; |
| 526 | const struct external_ldsym *src; |
| 527 | struct internal_ldsym *dst; |
| 528 | { |
| 529 | if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0) |
| 530 | memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); |
| 531 | else |
| 532 | { |
| 533 | dst->_l._l_l._l_zeroes = 0; |
| 534 | dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset); |
| 535 | } |
| 536 | dst->l_value = bfd_get_32 (abfd, src->l_value); |
| 537 | dst->l_scnum = bfd_get_16 (abfd, src->l_scnum); |
| 538 | dst->l_smtype = bfd_get_8 (abfd, src->l_smtype); |
| 539 | dst->l_smclas = bfd_get_8 (abfd, src->l_smclas); |
| 540 | dst->l_ifile = bfd_get_32 (abfd, src->l_ifile); |
| 541 | dst->l_parm = bfd_get_32 (abfd, src->l_parm); |
| 542 | } |
| 543 | |
| 544 | /* Swap out the ldsym structure. */ |
| 545 | |
| 546 | static void |
| 547 | xcoff_swap_ldsym_out (abfd, src, dst) |
| 548 | bfd *abfd; |
| 549 | const struct internal_ldsym *src; |
| 550 | struct external_ldsym *dst; |
| 551 | { |
| 552 | if (src->_l._l_l._l_zeroes != 0) |
| 553 | memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); |
| 554 | else |
| 555 | { |
| 556 | bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes); |
| 557 | bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset); |
| 558 | } |
| 559 | bfd_put_32 (abfd, src->l_value, dst->l_value); |
| 560 | bfd_put_16 (abfd, src->l_scnum, dst->l_scnum); |
| 561 | bfd_put_8 (abfd, src->l_smtype, dst->l_smtype); |
| 562 | bfd_put_8 (abfd, src->l_smclas, dst->l_smclas); |
| 563 | bfd_put_32 (abfd, src->l_ifile, dst->l_ifile); |
| 564 | bfd_put_32 (abfd, src->l_parm, dst->l_parm); |
| 565 | } |
| 566 | |
| 567 | /* Swap in the ldrel structure. */ |
| 568 | |
| 569 | static void |
| 570 | xcoff_swap_ldrel_in (abfd, src, dst) |
| 571 | bfd *abfd; |
| 572 | const struct external_ldrel *src; |
| 573 | struct internal_ldrel *dst; |
| 574 | { |
| 575 | dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr); |
| 576 | dst->l_symndx = bfd_get_32 (abfd, src->l_symndx); |
| 577 | dst->l_rtype = bfd_get_16 (abfd, src->l_rtype); |
| 578 | dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm); |
| 579 | } |
| 580 | |
| 581 | /* Swap out the ldrel structure. */ |
| 582 | |
| 583 | static void |
| 584 | xcoff_swap_ldrel_out (abfd, src, dst) |
| 585 | bfd *abfd; |
| 586 | const struct internal_ldrel *src; |
| 587 | struct external_ldrel *dst; |
| 588 | { |
| 589 | bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr); |
| 590 | bfd_put_32 (abfd, src->l_symndx, dst->l_symndx); |
| 591 | bfd_put_16 (abfd, src->l_rtype, dst->l_rtype); |
| 592 | bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm); |
| 593 | } |
| 594 | \f |
| 595 | /* Routines to read XCOFF dynamic information. This don't really |
| 596 | belong here, but we already have the ldsym manipulation routines |
| 597 | here. */ |
| 598 | |
| 599 | /* Read the contents of a section. */ |
| 600 | |
| 601 | static boolean |
| 602 | xcoff_get_section_contents (abfd, sec) |
| 603 | bfd *abfd; |
| 604 | asection *sec; |
| 605 | { |
| 606 | if (coff_section_data (abfd, sec) == NULL) |
| 607 | { |
| 608 | sec->used_by_bfd = bfd_zalloc (abfd, |
| 609 | sizeof (struct coff_section_tdata)); |
| 610 | if (sec->used_by_bfd == NULL) |
| 611 | return false; |
| 612 | } |
| 613 | |
| 614 | if (coff_section_data (abfd, sec)->contents == NULL) |
| 615 | { |
| 616 | coff_section_data (abfd, sec)->contents = |
| 617 | (bfd_byte *) bfd_malloc (sec->_raw_size); |
| 618 | if (coff_section_data (abfd, sec)->contents == NULL) |
| 619 | return false; |
| 620 | |
| 621 | if (! bfd_get_section_contents (abfd, sec, |
| 622 | coff_section_data (abfd, sec)->contents, |
| 623 | (file_ptr) 0, sec->_raw_size)) |
| 624 | return false; |
| 625 | } |
| 626 | |
| 627 | return true; |
| 628 | } |
| 629 | |
| 630 | /* Get the size required to hold the dynamic symbols. */ |
| 631 | |
| 632 | long |
| 633 | _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd) |
| 634 | bfd *abfd; |
| 635 | { |
| 636 | asection *lsec; |
| 637 | bfd_byte *contents; |
| 638 | struct internal_ldhdr ldhdr; |
| 639 | |
| 640 | if ((abfd->flags & DYNAMIC) == 0) |
| 641 | { |
| 642 | bfd_set_error (bfd_error_invalid_operation); |
| 643 | return -1; |
| 644 | } |
| 645 | |
| 646 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 647 | if (lsec == NULL) |
| 648 | { |
| 649 | bfd_set_error (bfd_error_no_symbols); |
| 650 | return -1; |
| 651 | } |
| 652 | |
| 653 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 654 | return -1; |
| 655 | contents = coff_section_data (abfd, lsec)->contents; |
| 656 | |
| 657 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| 658 | |
| 659 | return (ldhdr.l_nsyms + 1) * sizeof (asymbol *); |
| 660 | } |
| 661 | |
| 662 | /* Get the dynamic symbols. */ |
| 663 | |
| 664 | long |
| 665 | _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms) |
| 666 | bfd *abfd; |
| 667 | asymbol **psyms; |
| 668 | { |
| 669 | asection *lsec; |
| 670 | bfd_byte *contents; |
| 671 | struct internal_ldhdr ldhdr; |
| 672 | const char *strings; |
| 673 | struct external_ldsym *elsym, *elsymend; |
| 674 | coff_symbol_type *symbuf; |
| 675 | |
| 676 | if ((abfd->flags & DYNAMIC) == 0) |
| 677 | { |
| 678 | bfd_set_error (bfd_error_invalid_operation); |
| 679 | return -1; |
| 680 | } |
| 681 | |
| 682 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 683 | if (lsec == NULL) |
| 684 | { |
| 685 | bfd_set_error (bfd_error_no_symbols); |
| 686 | return -1; |
| 687 | } |
| 688 | |
| 689 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 690 | return -1; |
| 691 | contents = coff_section_data (abfd, lsec)->contents; |
| 692 | |
| 693 | coff_section_data (abfd, lsec)->keep_contents = true; |
| 694 | |
| 695 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| 696 | |
| 697 | strings = (char *) contents + ldhdr.l_stoff; |
| 698 | |
| 699 | symbuf = ((coff_symbol_type *) |
| 700 | bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type))); |
| 701 | if (symbuf == NULL) |
| 702 | return -1; |
| 703 | |
| 704 | elsym = (struct external_ldsym *) (contents + LDHDRSZ); |
| 705 | elsymend = elsym + ldhdr.l_nsyms; |
| 706 | for (; elsym < elsymend; elsym++, symbuf++, psyms++) |
| 707 | { |
| 708 | struct internal_ldsym ldsym; |
| 709 | |
| 710 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 711 | |
| 712 | symbuf->symbol.the_bfd = abfd; |
| 713 | |
| 714 | if (ldsym._l._l_l._l_zeroes == 0) |
| 715 | symbuf->symbol.name = strings + ldsym._l._l_l._l_offset; |
| 716 | else |
| 717 | { |
| 718 | int i; |
| 719 | |
| 720 | for (i = 0; i < SYMNMLEN; i++) |
| 721 | if (ldsym._l._l_name[i] == '\0') |
| 722 | break; |
| 723 | if (i < SYMNMLEN) |
| 724 | symbuf->symbol.name = (char *) elsym->_l._l_name; |
| 725 | else |
| 726 | { |
| 727 | char *c; |
| 728 | |
| 729 | c = bfd_alloc (abfd, SYMNMLEN + 1); |
| 730 | if (c == NULL) |
| 731 | return -1; |
| 732 | memcpy (c, ldsym._l._l_name, SYMNMLEN); |
| 733 | c[SYMNMLEN] = '\0'; |
| 734 | symbuf->symbol.name = c; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | if (ldsym.l_smclas == XMC_XO) |
| 739 | symbuf->symbol.section = bfd_abs_section_ptr; |
| 740 | else |
| 741 | symbuf->symbol.section = coff_section_from_bfd_index (abfd, |
| 742 | ldsym.l_scnum); |
| 743 | symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma; |
| 744 | |
| 745 | symbuf->symbol.flags = BSF_NO_FLAGS; |
| 746 | if ((ldsym.l_smtype & L_EXPORT) != 0) |
| 747 | symbuf->symbol.flags |= BSF_GLOBAL; |
| 748 | |
| 749 | /* FIXME: We have no way to record the other information stored |
| 750 | with the loader symbol. */ |
| 751 | |
| 752 | *psyms = (asymbol *) symbuf; |
| 753 | } |
| 754 | |
| 755 | *psyms = NULL; |
| 756 | |
| 757 | return ldhdr.l_nsyms; |
| 758 | } |
| 759 | |
| 760 | /* Get the size required to hold the dynamic relocs. */ |
| 761 | |
| 762 | long |
| 763 | _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd) |
| 764 | bfd *abfd; |
| 765 | { |
| 766 | asection *lsec; |
| 767 | bfd_byte *contents; |
| 768 | struct internal_ldhdr ldhdr; |
| 769 | |
| 770 | if ((abfd->flags & DYNAMIC) == 0) |
| 771 | { |
| 772 | bfd_set_error (bfd_error_invalid_operation); |
| 773 | return -1; |
| 774 | } |
| 775 | |
| 776 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 777 | if (lsec == NULL) |
| 778 | { |
| 779 | bfd_set_error (bfd_error_no_symbols); |
| 780 | return -1; |
| 781 | } |
| 782 | |
| 783 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 784 | return -1; |
| 785 | contents = coff_section_data (abfd, lsec)->contents; |
| 786 | |
| 787 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| 788 | |
| 789 | return (ldhdr.l_nreloc + 1) * sizeof (arelent *); |
| 790 | } |
| 791 | |
| 792 | /* The typical dynamic reloc. */ |
| 793 | |
| 794 | static reloc_howto_type xcoff_dynamic_reloc = |
| 795 | HOWTO (0, /* type */ |
| 796 | 0, /* rightshift */ |
| 797 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 798 | 32, /* bitsize */ |
| 799 | false, /* pc_relative */ |
| 800 | 0, /* bitpos */ |
| 801 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 802 | 0, /* special_function */ |
| 803 | "R_POS", /* name */ |
| 804 | true, /* partial_inplace */ |
| 805 | 0xffffffff, /* src_mask */ |
| 806 | 0xffffffff, /* dst_mask */ |
| 807 | false); /* pcrel_offset */ |
| 808 | |
| 809 | /* Get the dynamic relocs. */ |
| 810 | |
| 811 | long |
| 812 | _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms) |
| 813 | bfd *abfd; |
| 814 | arelent **prelocs; |
| 815 | asymbol **syms; |
| 816 | { |
| 817 | asection *lsec; |
| 818 | bfd_byte *contents; |
| 819 | struct internal_ldhdr ldhdr; |
| 820 | arelent *relbuf; |
| 821 | struct external_ldrel *elrel, *elrelend; |
| 822 | |
| 823 | if ((abfd->flags & DYNAMIC) == 0) |
| 824 | { |
| 825 | bfd_set_error (bfd_error_invalid_operation); |
| 826 | return -1; |
| 827 | } |
| 828 | |
| 829 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 830 | if (lsec == NULL) |
| 831 | { |
| 832 | bfd_set_error (bfd_error_no_symbols); |
| 833 | return -1; |
| 834 | } |
| 835 | |
| 836 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 837 | return -1; |
| 838 | contents = coff_section_data (abfd, lsec)->contents; |
| 839 | |
| 840 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| 841 | |
| 842 | relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent)); |
| 843 | if (relbuf == NULL) |
| 844 | return -1; |
| 845 | |
| 846 | elrel = ((struct external_ldrel *) |
| 847 | (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ)); |
| 848 | elrelend = elrel + ldhdr.l_nreloc; |
| 849 | for (; elrel < elrelend; elrel++, relbuf++, prelocs++) |
| 850 | { |
| 851 | struct internal_ldrel ldrel; |
| 852 | |
| 853 | xcoff_swap_ldrel_in (abfd, elrel, &ldrel); |
| 854 | |
| 855 | if (ldrel.l_symndx >= 3) |
| 856 | relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3); |
| 857 | else |
| 858 | { |
| 859 | const char *name; |
| 860 | asection *sec; |
| 861 | |
| 862 | switch (ldrel.l_symndx) |
| 863 | { |
| 864 | case 0: |
| 865 | name = ".text"; |
| 866 | break; |
| 867 | case 1: |
| 868 | name = ".data"; |
| 869 | break; |
| 870 | case 2: |
| 871 | name = ".bss"; |
| 872 | break; |
| 873 | default: |
| 874 | abort (); |
| 875 | break; |
| 876 | } |
| 877 | |
| 878 | sec = bfd_get_section_by_name (abfd, name); |
| 879 | if (sec == NULL) |
| 880 | { |
| 881 | bfd_set_error (bfd_error_bad_value); |
| 882 | return -1; |
| 883 | } |
| 884 | |
| 885 | relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr; |
| 886 | } |
| 887 | |
| 888 | relbuf->address = ldrel.l_vaddr; |
| 889 | relbuf->addend = 0; |
| 890 | |
| 891 | /* Most dynamic relocs have the same type. FIXME: This is only |
| 892 | correct if ldrel.l_rtype == 0. In other cases, we should use |
| 893 | a different howto. */ |
| 894 | relbuf->howto = &xcoff_dynamic_reloc; |
| 895 | |
| 896 | /* FIXME: We have no way to record the l_rsecnm field. */ |
| 897 | |
| 898 | *prelocs = relbuf; |
| 899 | } |
| 900 | |
| 901 | *prelocs = NULL; |
| 902 | |
| 903 | return ldhdr.l_nreloc; |
| 904 | } |
| 905 | \f |
| 906 | /* Routine to create an entry in an XCOFF link hash table. */ |
| 907 | |
| 908 | static struct bfd_hash_entry * |
| 909 | xcoff_link_hash_newfunc (entry, table, string) |
| 910 | struct bfd_hash_entry *entry; |
| 911 | struct bfd_hash_table *table; |
| 912 | const char *string; |
| 913 | { |
| 914 | struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry; |
| 915 | |
| 916 | /* Allocate the structure if it has not already been allocated by a |
| 917 | subclass. */ |
| 918 | if (ret == (struct xcoff_link_hash_entry *) NULL) |
| 919 | ret = ((struct xcoff_link_hash_entry *) |
| 920 | bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry))); |
| 921 | if (ret == (struct xcoff_link_hash_entry *) NULL) |
| 922 | return (struct bfd_hash_entry *) ret; |
| 923 | |
| 924 | /* Call the allocation method of the superclass. */ |
| 925 | ret = ((struct xcoff_link_hash_entry *) |
| 926 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 927 | table, string)); |
| 928 | if (ret != NULL) |
| 929 | { |
| 930 | /* Set local fields. */ |
| 931 | ret->indx = -1; |
| 932 | ret->toc_section = NULL; |
| 933 | ret->u.toc_indx = -1; |
| 934 | ret->descriptor = NULL; |
| 935 | ret->ldsym = NULL; |
| 936 | ret->ldindx = -1; |
| 937 | ret->flags = 0; |
| 938 | ret->smclas = XMC_UA; |
| 939 | } |
| 940 | |
| 941 | return (struct bfd_hash_entry *) ret; |
| 942 | } |
| 943 | |
| 944 | /* Create a XCOFF link hash table. */ |
| 945 | |
| 946 | struct bfd_link_hash_table * |
| 947 | _bfd_xcoff_bfd_link_hash_table_create (abfd) |
| 948 | bfd *abfd; |
| 949 | { |
| 950 | struct xcoff_link_hash_table *ret; |
| 951 | |
| 952 | ret = ((struct xcoff_link_hash_table *) |
| 953 | bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table))); |
| 954 | if (ret == (struct xcoff_link_hash_table *) NULL) |
| 955 | return (struct bfd_link_hash_table *) NULL; |
| 956 | if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc)) |
| 957 | { |
| 958 | bfd_release (abfd, ret); |
| 959 | return (struct bfd_link_hash_table *) NULL; |
| 960 | } |
| 961 | |
| 962 | ret->debug_strtab = _bfd_xcoff_stringtab_init (); |
| 963 | ret->debug_section = NULL; |
| 964 | ret->loader_section = NULL; |
| 965 | ret->ldrel_count = 0; |
| 966 | memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr)); |
| 967 | ret->linkage_section = NULL; |
| 968 | ret->toc_section = NULL; |
| 969 | ret->descriptor_section = NULL; |
| 970 | ret->imports = NULL; |
| 971 | ret->file_align = 0; |
| 972 | ret->textro = false; |
| 973 | ret->gc = false; |
| 974 | memset (ret->special_sections, 0, sizeof ret->special_sections); |
| 975 | |
| 976 | /* The linker will always generate a full a.out header. We need to |
| 977 | record that fact now, before the sizeof_headers routine could be |
| 978 | called. */ |
| 979 | xcoff_data (abfd)->full_aouthdr = true; |
| 980 | |
| 981 | return &ret->root; |
| 982 | } |
| 983 | |
| 984 | /* Look up an entry in an XCOFF link hash table. */ |
| 985 | |
| 986 | #define xcoff_link_hash_lookup(table, string, create, copy, follow) \ |
| 987 | ((struct xcoff_link_hash_entry *) \ |
| 988 | bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\ |
| 989 | (follow))) |
| 990 | |
| 991 | /* Traverse an XCOFF link hash table. */ |
| 992 | |
| 993 | #define xcoff_link_hash_traverse(table, func, info) \ |
| 994 | (bfd_link_hash_traverse \ |
| 995 | (&(table)->root, \ |
| 996 | (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ |
| 997 | (info))) |
| 998 | |
| 999 | /* Get the XCOFF link hash table from the info structure. This is |
| 1000 | just a cast. */ |
| 1001 | |
| 1002 | #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash)) |
| 1003 | \f |
| 1004 | /* Read internal relocs for an XCOFF csect. This is a wrapper around |
| 1005 | _bfd_coff_read_internal_relocs which tries to take advantage of any |
| 1006 | relocs which may have been cached for the enclosing section. */ |
| 1007 | |
| 1008 | static struct internal_reloc * |
| 1009 | xcoff_read_internal_relocs (abfd, sec, cache, external_relocs, |
| 1010 | require_internal, internal_relocs) |
| 1011 | bfd *abfd; |
| 1012 | asection *sec; |
| 1013 | boolean cache; |
| 1014 | bfd_byte *external_relocs; |
| 1015 | boolean require_internal; |
| 1016 | struct internal_reloc *internal_relocs; |
| 1017 | { |
| 1018 | if (coff_section_data (abfd, sec) != NULL |
| 1019 | && coff_section_data (abfd, sec)->relocs == NULL |
| 1020 | && xcoff_section_data (abfd, sec) != NULL) |
| 1021 | { |
| 1022 | asection *enclosing; |
| 1023 | |
| 1024 | enclosing = xcoff_section_data (abfd, sec)->enclosing; |
| 1025 | |
| 1026 | if (enclosing != NULL |
| 1027 | && (coff_section_data (abfd, enclosing) == NULL |
| 1028 | || coff_section_data (abfd, enclosing)->relocs == NULL) |
| 1029 | && cache |
| 1030 | && enclosing->reloc_count > 0) |
| 1031 | { |
| 1032 | if (_bfd_coff_read_internal_relocs (abfd, enclosing, true, |
| 1033 | external_relocs, false, |
| 1034 | (struct internal_reloc *) NULL) |
| 1035 | == NULL) |
| 1036 | return NULL; |
| 1037 | } |
| 1038 | |
| 1039 | if (enclosing != NULL |
| 1040 | && coff_section_data (abfd, enclosing) != NULL |
| 1041 | && coff_section_data (abfd, enclosing)->relocs != NULL) |
| 1042 | { |
| 1043 | size_t off; |
| 1044 | |
| 1045 | off = ((sec->rel_filepos - enclosing->rel_filepos) |
| 1046 | / bfd_coff_relsz (abfd)); |
| 1047 | if (! require_internal) |
| 1048 | return coff_section_data (abfd, enclosing)->relocs + off; |
| 1049 | memcpy (internal_relocs, |
| 1050 | coff_section_data (abfd, enclosing)->relocs + off, |
| 1051 | sec->reloc_count * sizeof (struct internal_reloc)); |
| 1052 | return internal_relocs; |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, |
| 1057 | require_internal, internal_relocs); |
| 1058 | } |
| 1059 | \f |
| 1060 | /* Given an XCOFF BFD, add symbols to the global hash table as |
| 1061 | appropriate. */ |
| 1062 | |
| 1063 | boolean |
| 1064 | _bfd_xcoff_bfd_link_add_symbols (abfd, info) |
| 1065 | bfd *abfd; |
| 1066 | struct bfd_link_info *info; |
| 1067 | { |
| 1068 | switch (bfd_get_format (abfd)) |
| 1069 | { |
| 1070 | case bfd_object: |
| 1071 | return xcoff_link_add_object_symbols (abfd, info); |
| 1072 | |
| 1073 | case bfd_archive: |
| 1074 | /* If the archive has a map, do the usual search. We then need |
| 1075 | to check the archive for stripped dynamic objects, because |
| 1076 | they will not appear in the archive map even though they |
| 1077 | should, perhaps, be included. If the archive has no map, we |
| 1078 | just consider each object file in turn, since that apparently |
| 1079 | is what the AIX native linker does. */ |
| 1080 | if (bfd_has_map (abfd)) |
| 1081 | { |
| 1082 | if (! (_bfd_generic_link_add_archive_symbols |
| 1083 | (abfd, info, xcoff_link_check_archive_element))) |
| 1084 | return false; |
| 1085 | } |
| 1086 | |
| 1087 | { |
| 1088 | bfd *member; |
| 1089 | |
| 1090 | member = bfd_openr_next_archived_file (abfd, (bfd *) NULL); |
| 1091 | while (member != NULL) |
| 1092 | { |
| 1093 | if (bfd_check_format (member, bfd_object) |
| 1094 | && (! bfd_has_map (abfd) |
| 1095 | || ((member->flags & DYNAMIC) != 0 |
| 1096 | && (member->flags & HAS_SYMS) == 0))) |
| 1097 | { |
| 1098 | boolean needed; |
| 1099 | |
| 1100 | if (! xcoff_link_check_archive_element (member, info, &needed)) |
| 1101 | return false; |
| 1102 | if (needed) |
| 1103 | member->archive_pass = -1; |
| 1104 | } |
| 1105 | member = bfd_openr_next_archived_file (abfd, member); |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | return true; |
| 1110 | |
| 1111 | default: |
| 1112 | bfd_set_error (bfd_error_wrong_format); |
| 1113 | return false; |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | /* Add symbols from an XCOFF object file. */ |
| 1118 | |
| 1119 | static boolean |
| 1120 | xcoff_link_add_object_symbols (abfd, info) |
| 1121 | bfd *abfd; |
| 1122 | struct bfd_link_info *info; |
| 1123 | { |
| 1124 | if (! _bfd_coff_get_external_symbols (abfd)) |
| 1125 | return false; |
| 1126 | if (! xcoff_link_add_symbols (abfd, info)) |
| 1127 | return false; |
| 1128 | if (! info->keep_memory) |
| 1129 | { |
| 1130 | if (! _bfd_coff_free_symbols (abfd)) |
| 1131 | return false; |
| 1132 | } |
| 1133 | return true; |
| 1134 | } |
| 1135 | |
| 1136 | /* Check a single archive element to see if we need to include it in |
| 1137 | the link. *PNEEDED is set according to whether this element is |
| 1138 | needed in the link or not. This is called via |
| 1139 | _bfd_generic_link_add_archive_symbols. */ |
| 1140 | |
| 1141 | static boolean |
| 1142 | xcoff_link_check_archive_element (abfd, info, pneeded) |
| 1143 | bfd *abfd; |
| 1144 | struct bfd_link_info *info; |
| 1145 | boolean *pneeded; |
| 1146 | { |
| 1147 | if (! _bfd_coff_get_external_symbols (abfd)) |
| 1148 | return false; |
| 1149 | |
| 1150 | if (! xcoff_link_check_ar_symbols (abfd, info, pneeded)) |
| 1151 | return false; |
| 1152 | |
| 1153 | if (*pneeded) |
| 1154 | { |
| 1155 | if (! xcoff_link_add_symbols (abfd, info)) |
| 1156 | return false; |
| 1157 | } |
| 1158 | |
| 1159 | if (! info->keep_memory || ! *pneeded) |
| 1160 | { |
| 1161 | if (! _bfd_coff_free_symbols (abfd)) |
| 1162 | return false; |
| 1163 | } |
| 1164 | |
| 1165 | return true; |
| 1166 | } |
| 1167 | |
| 1168 | /* Look through the symbols to see if this object file should be |
| 1169 | included in the link. */ |
| 1170 | |
| 1171 | static boolean |
| 1172 | xcoff_link_check_ar_symbols (abfd, info, pneeded) |
| 1173 | bfd *abfd; |
| 1174 | struct bfd_link_info *info; |
| 1175 | boolean *pneeded; |
| 1176 | { |
| 1177 | bfd_size_type symesz; |
| 1178 | bfd_byte *esym; |
| 1179 | bfd_byte *esym_end; |
| 1180 | |
| 1181 | *pneeded = false; |
| 1182 | |
| 1183 | if ((abfd->flags & DYNAMIC) != 0 |
| 1184 | && ! info->static_link |
| 1185 | && info->hash->creator == abfd->xvec) |
| 1186 | return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded); |
| 1187 | |
| 1188 | symesz = bfd_coff_symesz (abfd); |
| 1189 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 1190 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; |
| 1191 | while (esym < esym_end) |
| 1192 | { |
| 1193 | struct internal_syment sym; |
| 1194 | |
| 1195 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| 1196 | |
| 1197 | if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF) |
| 1198 | { |
| 1199 | const char *name; |
| 1200 | char buf[SYMNMLEN + 1]; |
| 1201 | struct bfd_link_hash_entry *h; |
| 1202 | |
| 1203 | /* This symbol is externally visible, and is defined by this |
| 1204 | object file. */ |
| 1205 | |
| 1206 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| 1207 | if (name == NULL) |
| 1208 | return false; |
| 1209 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
| 1210 | |
| 1211 | /* We are only interested in symbols that are currently |
| 1212 | undefined. If a symbol is currently known to be common, |
| 1213 | XCOFF linkers do not bring in an object file which |
| 1214 | defines it. We also don't bring in symbols to satisfy |
| 1215 | undefined references in shared objects. */ |
| 1216 | if (h != (struct bfd_link_hash_entry *) NULL |
| 1217 | && h->type == bfd_link_hash_undefined |
| 1218 | && (info->hash->creator != abfd->xvec |
| 1219 | || (((struct xcoff_link_hash_entry *) h)->flags |
| 1220 | & XCOFF_DEF_DYNAMIC) == 0)) |
| 1221 | { |
| 1222 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) |
| 1223 | return false; |
| 1224 | *pneeded = true; |
| 1225 | return true; |
| 1226 | } |
| 1227 | } |
| 1228 | |
| 1229 | esym += (sym.n_numaux + 1) * symesz; |
| 1230 | } |
| 1231 | |
| 1232 | /* We do not need this object file. */ |
| 1233 | return true; |
| 1234 | } |
| 1235 | |
| 1236 | /* Look through the loader symbols to see if this dynamic object |
| 1237 | should be included in the link. The native linker uses the loader |
| 1238 | symbols, not the normal symbol table, so we do too. */ |
| 1239 | |
| 1240 | static boolean |
| 1241 | xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded) |
| 1242 | bfd *abfd; |
| 1243 | struct bfd_link_info *info; |
| 1244 | boolean *pneeded; |
| 1245 | { |
| 1246 | asection *lsec; |
| 1247 | bfd_byte *buf; |
| 1248 | struct internal_ldhdr ldhdr; |
| 1249 | const char *strings; |
| 1250 | struct external_ldsym *elsym, *elsymend; |
| 1251 | |
| 1252 | *pneeded = false; |
| 1253 | |
| 1254 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 1255 | if (lsec == NULL) |
| 1256 | { |
| 1257 | /* There are no symbols, so don't try to include it. */ |
| 1258 | return true; |
| 1259 | } |
| 1260 | |
| 1261 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 1262 | return false; |
| 1263 | buf = coff_section_data (abfd, lsec)->contents; |
| 1264 | |
| 1265 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); |
| 1266 | |
| 1267 | strings = (char *) buf + ldhdr.l_stoff; |
| 1268 | |
| 1269 | elsym = (struct external_ldsym *) (buf + LDHDRSZ); |
| 1270 | elsymend = elsym + ldhdr.l_nsyms; |
| 1271 | for (; elsym < elsymend; elsym++) |
| 1272 | { |
| 1273 | struct internal_ldsym ldsym; |
| 1274 | char nambuf[SYMNMLEN + 1]; |
| 1275 | const char *name; |
| 1276 | struct bfd_link_hash_entry *h; |
| 1277 | |
| 1278 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 1279 | |
| 1280 | /* We are only interested in exported symbols. */ |
| 1281 | if ((ldsym.l_smtype & L_EXPORT) == 0) |
| 1282 | continue; |
| 1283 | |
| 1284 | if (ldsym._l._l_l._l_zeroes == 0) |
| 1285 | name = strings + ldsym._l._l_l._l_offset; |
| 1286 | else |
| 1287 | { |
| 1288 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| 1289 | nambuf[SYMNMLEN] = '\0'; |
| 1290 | name = nambuf; |
| 1291 | } |
| 1292 | |
| 1293 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
| 1294 | |
| 1295 | /* We are only interested in symbols that are currently |
| 1296 | undefined. At this point we know that we are using an XCOFF |
| 1297 | hash table. */ |
| 1298 | if (h != NULL |
| 1299 | && h->type == bfd_link_hash_undefined |
| 1300 | && (((struct xcoff_link_hash_entry *) h)->flags |
| 1301 | & XCOFF_DEF_DYNAMIC) == 0) |
| 1302 | { |
| 1303 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) |
| 1304 | return false; |
| 1305 | *pneeded = true; |
| 1306 | return true; |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | /* We do not need this shared object. */ |
| 1311 | |
| 1312 | if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| 1313 | { |
| 1314 | free (coff_section_data (abfd, lsec)->contents); |
| 1315 | coff_section_data (abfd, lsec)->contents = NULL; |
| 1316 | } |
| 1317 | |
| 1318 | return true; |
| 1319 | } |
| 1320 | |
| 1321 | /* Returns the index of reloc in RELOCS with the least address greater |
| 1322 | than or equal to ADDRESS. The relocs are sorted by address. */ |
| 1323 | |
| 1324 | static bfd_size_type |
| 1325 | xcoff_find_reloc (relocs, count, address) |
| 1326 | struct internal_reloc *relocs; |
| 1327 | bfd_size_type count; |
| 1328 | bfd_vma address; |
| 1329 | { |
| 1330 | bfd_size_type min, max, this; |
| 1331 | |
| 1332 | if (count < 2) |
| 1333 | { |
| 1334 | if (count == 1 && relocs[0].r_vaddr < address) |
| 1335 | return 1; |
| 1336 | else |
| 1337 | return 0; |
| 1338 | } |
| 1339 | |
| 1340 | min = 0; |
| 1341 | max = count; |
| 1342 | |
| 1343 | /* Do a binary search over (min,max]. */ |
| 1344 | while (min + 1 < max) |
| 1345 | { |
| 1346 | bfd_vma raddr; |
| 1347 | |
| 1348 | this = (max + min) / 2; |
| 1349 | raddr = relocs[this].r_vaddr; |
| 1350 | if (raddr > address) |
| 1351 | max = this; |
| 1352 | else if (raddr < address) |
| 1353 | min = this; |
| 1354 | else |
| 1355 | { |
| 1356 | min = this; |
| 1357 | break; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | if (relocs[min].r_vaddr < address) |
| 1362 | return min + 1; |
| 1363 | |
| 1364 | while (min > 0 |
| 1365 | && relocs[min - 1].r_vaddr == address) |
| 1366 | --min; |
| 1367 | |
| 1368 | return min; |
| 1369 | } |
| 1370 | |
| 1371 | /* Add all the symbols from an object file to the hash table. |
| 1372 | |
| 1373 | XCOFF is a weird format. A normal XCOFF .o files will have three |
| 1374 | COFF sections--.text, .data, and .bss--but each COFF section will |
| 1375 | contain many csects. These csects are described in the symbol |
| 1376 | table. From the linker's point of view, each csect must be |
| 1377 | considered a section in its own right. For example, a TOC entry is |
| 1378 | handled as a small XMC_TC csect. The linker must be able to merge |
| 1379 | different TOC entries together, which means that it must be able to |
| 1380 | extract the XMC_TC csects from the .data section of the input .o |
| 1381 | file. |
| 1382 | |
| 1383 | From the point of view of our linker, this is, of course, a hideous |
| 1384 | nightmare. We cope by actually creating sections for each csect, |
| 1385 | and discarding the original sections. We then have to handle the |
| 1386 | relocation entries carefully, since the only way to tell which |
| 1387 | csect they belong to is to examine the address. */ |
| 1388 | |
| 1389 | static boolean |
| 1390 | xcoff_link_add_symbols (abfd, info) |
| 1391 | bfd *abfd; |
| 1392 | struct bfd_link_info *info; |
| 1393 | { |
| 1394 | unsigned int n_tmask; |
| 1395 | unsigned int n_btshft; |
| 1396 | boolean default_copy; |
| 1397 | bfd_size_type symcount; |
| 1398 | struct xcoff_link_hash_entry **sym_hash; |
| 1399 | asection **csect_cache; |
| 1400 | bfd_size_type linesz; |
| 1401 | asection *o; |
| 1402 | asection *last_real; |
| 1403 | boolean keep_syms; |
| 1404 | asection *csect; |
| 1405 | unsigned int csect_index; |
| 1406 | asection *first_csect; |
| 1407 | bfd_size_type symesz; |
| 1408 | bfd_byte *esym; |
| 1409 | bfd_byte *esym_end; |
| 1410 | struct reloc_info_struct |
| 1411 | { |
| 1412 | struct internal_reloc *relocs; |
| 1413 | asection **csects; |
| 1414 | bfd_byte *linenos; |
| 1415 | } *reloc_info = NULL; |
| 1416 | |
| 1417 | keep_syms = obj_coff_keep_syms (abfd); |
| 1418 | |
| 1419 | if ((abfd->flags & DYNAMIC) != 0 |
| 1420 | && ! info->static_link) |
| 1421 | { |
| 1422 | if (! xcoff_link_add_dynamic_symbols (abfd, info)) |
| 1423 | return false; |
| 1424 | } |
| 1425 | |
| 1426 | if (info->hash->creator == abfd->xvec) |
| 1427 | { |
| 1428 | /* We need to build a .loader section, so we do it here. This |
| 1429 | won't work if we're producing an XCOFF output file with no |
| 1430 | XCOFF input files. FIXME. */ |
| 1431 | if (xcoff_hash_table (info)->loader_section == NULL) |
| 1432 | { |
| 1433 | asection *lsec; |
| 1434 | |
| 1435 | lsec = bfd_make_section_anyway (abfd, ".loader"); |
| 1436 | if (lsec == NULL) |
| 1437 | goto error_return; |
| 1438 | xcoff_hash_table (info)->loader_section = lsec; |
| 1439 | lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 1440 | } |
| 1441 | /* Likewise for the linkage section. */ |
| 1442 | if (xcoff_hash_table (info)->linkage_section == NULL) |
| 1443 | { |
| 1444 | asection *lsec; |
| 1445 | |
| 1446 | lsec = bfd_make_section_anyway (abfd, ".gl"); |
| 1447 | if (lsec == NULL) |
| 1448 | goto error_return; |
| 1449 | xcoff_hash_table (info)->linkage_section = lsec; |
| 1450 | lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1451 | | SEC_IN_MEMORY); |
| 1452 | lsec->alignment_power = 2; |
| 1453 | } |
| 1454 | /* Likewise for the TOC section. */ |
| 1455 | if (xcoff_hash_table (info)->toc_section == NULL) |
| 1456 | { |
| 1457 | asection *tsec; |
| 1458 | |
| 1459 | tsec = bfd_make_section_anyway (abfd, ".tc"); |
| 1460 | if (tsec == NULL) |
| 1461 | goto error_return; |
| 1462 | xcoff_hash_table (info)->toc_section = tsec; |
| 1463 | tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1464 | | SEC_IN_MEMORY); |
| 1465 | tsec->alignment_power = 2; |
| 1466 | } |
| 1467 | /* Likewise for the descriptor section. */ |
| 1468 | if (xcoff_hash_table (info)->descriptor_section == NULL) |
| 1469 | { |
| 1470 | asection *dsec; |
| 1471 | |
| 1472 | dsec = bfd_make_section_anyway (abfd, ".ds"); |
| 1473 | if (dsec == NULL) |
| 1474 | goto error_return; |
| 1475 | xcoff_hash_table (info)->descriptor_section = dsec; |
| 1476 | dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1477 | | SEC_IN_MEMORY); |
| 1478 | dsec->alignment_power = 2; |
| 1479 | } |
| 1480 | /* Likewise for the .debug section. */ |
| 1481 | if (xcoff_hash_table (info)->debug_section == NULL |
| 1482 | && info->strip != strip_all) |
| 1483 | { |
| 1484 | asection *dsec; |
| 1485 | |
| 1486 | dsec = bfd_make_section_anyway (abfd, ".debug"); |
| 1487 | if (dsec == NULL) |
| 1488 | goto error_return; |
| 1489 | xcoff_hash_table (info)->debug_section = dsec; |
| 1490 | dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | if ((abfd->flags & DYNAMIC) != 0 |
| 1495 | && ! info->static_link) |
| 1496 | return true; |
| 1497 | |
| 1498 | n_tmask = coff_data (abfd)->local_n_tmask; |
| 1499 | n_btshft = coff_data (abfd)->local_n_btshft; |
| 1500 | |
| 1501 | /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| 1502 | #define N_TMASK n_tmask |
| 1503 | #define N_BTSHFT n_btshft |
| 1504 | |
| 1505 | if (info->keep_memory) |
| 1506 | default_copy = false; |
| 1507 | else |
| 1508 | default_copy = true; |
| 1509 | |
| 1510 | symcount = obj_raw_syment_count (abfd); |
| 1511 | |
| 1512 | /* We keep a list of the linker hash table entries that correspond |
| 1513 | to each external symbol. */ |
| 1514 | sym_hash = ((struct xcoff_link_hash_entry **) |
| 1515 | bfd_alloc (abfd, |
| 1516 | (symcount |
| 1517 | * sizeof (struct xcoff_link_hash_entry *)))); |
| 1518 | if (sym_hash == NULL && symcount != 0) |
| 1519 | goto error_return; |
| 1520 | coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash; |
| 1521 | memset (sym_hash, 0, |
| 1522 | (size_t) symcount * sizeof (struct xcoff_link_hash_entry *)); |
| 1523 | |
| 1524 | /* Because of the weird stuff we are doing with XCOFF csects, we can |
| 1525 | not easily determine which section a symbol is in, so we store |
| 1526 | the information in the tdata for the input file. */ |
| 1527 | csect_cache = ((asection **) |
| 1528 | bfd_alloc (abfd, symcount * sizeof (asection *))); |
| 1529 | if (csect_cache == NULL && symcount != 0) |
| 1530 | goto error_return; |
| 1531 | xcoff_data (abfd)->csects = csect_cache; |
| 1532 | memset (csect_cache, 0, (size_t) symcount * sizeof (asection *)); |
| 1533 | |
| 1534 | /* While splitting sections into csects, we need to assign the |
| 1535 | relocs correctly. The relocs and the csects must both be in |
| 1536 | order by VMA within a given section, so we handle this by |
| 1537 | scanning along the relocs as we process the csects. We index |
| 1538 | into reloc_info using the section target_index. */ |
| 1539 | reloc_info = ((struct reloc_info_struct *) |
| 1540 | bfd_malloc ((abfd->section_count + 1) |
| 1541 | * sizeof (struct reloc_info_struct))); |
| 1542 | if (reloc_info == NULL) |
| 1543 | goto error_return; |
| 1544 | memset ((PTR) reloc_info, 0, |
| 1545 | (abfd->section_count + 1) * sizeof (struct reloc_info_struct)); |
| 1546 | |
| 1547 | /* Read in the relocs and line numbers for each section. */ |
| 1548 | linesz = bfd_coff_linesz (abfd); |
| 1549 | last_real = NULL; |
| 1550 | for (o = abfd->sections; o != NULL; o = o->next) |
| 1551 | { |
| 1552 | last_real = o; |
| 1553 | if ((o->flags & SEC_RELOC) != 0) |
| 1554 | { |
| 1555 | reloc_info[o->target_index].relocs = |
| 1556 | xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL, |
| 1557 | false, (struct internal_reloc *) NULL); |
| 1558 | reloc_info[o->target_index].csects = |
| 1559 | (asection **) bfd_malloc (o->reloc_count * sizeof (asection *)); |
| 1560 | if (reloc_info[o->target_index].csects == NULL) |
| 1561 | goto error_return; |
| 1562 | memset (reloc_info[o->target_index].csects, 0, |
| 1563 | o->reloc_count * sizeof (asection *)); |
| 1564 | } |
| 1565 | |
| 1566 | if ((info->strip == strip_none || info->strip == strip_some) |
| 1567 | && o->lineno_count > 0) |
| 1568 | { |
| 1569 | bfd_byte *linenos; |
| 1570 | |
| 1571 | linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz); |
| 1572 | if (linenos == NULL) |
| 1573 | goto error_return; |
| 1574 | reloc_info[o->target_index].linenos = linenos; |
| 1575 | if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0 |
| 1576 | || (bfd_read (linenos, linesz, o->lineno_count, abfd) |
| 1577 | != linesz * o->lineno_count)) |
| 1578 | goto error_return; |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | /* Don't let the linker relocation routines discard the symbols. */ |
| 1583 | obj_coff_keep_syms (abfd) = true; |
| 1584 | |
| 1585 | csect = NULL; |
| 1586 | csect_index = 0; |
| 1587 | first_csect = NULL; |
| 1588 | |
| 1589 | symesz = bfd_coff_symesz (abfd); |
| 1590 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); |
| 1591 | esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| 1592 | esym_end = esym + symcount * symesz; |
| 1593 | while (esym < esym_end) |
| 1594 | { |
| 1595 | struct internal_syment sym; |
| 1596 | union internal_auxent aux; |
| 1597 | const char *name; |
| 1598 | char buf[SYMNMLEN + 1]; |
| 1599 | int smtyp; |
| 1600 | flagword flags; |
| 1601 | asection *section; |
| 1602 | bfd_vma value; |
| 1603 | struct xcoff_link_hash_entry *set_toc; |
| 1604 | |
| 1605 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| 1606 | |
| 1607 | /* In this pass we are only interested in symbols with csect |
| 1608 | information. */ |
| 1609 | if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT) |
| 1610 | { |
| 1611 | if (sym.n_sclass == C_FILE && csect != NULL) |
| 1612 | { |
| 1613 | xcoff_section_data (abfd, csect)->last_symndx = |
| 1614 | ((esym |
| 1615 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1616 | / symesz); |
| 1617 | csect = NULL; |
| 1618 | } |
| 1619 | |
| 1620 | if (csect != NULL) |
| 1621 | *csect_cache = csect; |
| 1622 | else if (first_csect == NULL || sym.n_sclass == C_FILE) |
| 1623 | *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1624 | else |
| 1625 | *csect_cache = NULL; |
| 1626 | esym += (sym.n_numaux + 1) * symesz; |
| 1627 | sym_hash += sym.n_numaux + 1; |
| 1628 | csect_cache += sym.n_numaux + 1; |
| 1629 | continue; |
| 1630 | } |
| 1631 | |
| 1632 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| 1633 | if (name == NULL) |
| 1634 | goto error_return; |
| 1635 | |
| 1636 | /* If this symbol has line number information attached to it, |
| 1637 | and we're not stripping it, count the number of entries and |
| 1638 | add them to the count for this csect. In the final link pass |
| 1639 | we are going to attach line number information by symbol, |
| 1640 | rather than by section, in order to more easily handle |
| 1641 | garbage collection. */ |
| 1642 | if ((info->strip == strip_none || info->strip == strip_some) |
| 1643 | && sym.n_numaux > 1 |
| 1644 | && csect != NULL |
| 1645 | && ISFCN (sym.n_type)) |
| 1646 | { |
| 1647 | union internal_auxent auxlin; |
| 1648 | |
| 1649 | bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz), |
| 1650 | sym.n_type, sym.n_sclass, |
| 1651 | 0, sym.n_numaux, (PTR) &auxlin); |
| 1652 | if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| 1653 | { |
| 1654 | asection *enclosing; |
| 1655 | bfd_size_type linoff; |
| 1656 | |
| 1657 | enclosing = xcoff_section_data (abfd, csect)->enclosing; |
| 1658 | if (enclosing == NULL) |
| 1659 | { |
| 1660 | (*_bfd_error_handler) |
| 1661 | (_("%s: `%s' has line numbers but no enclosing section"), |
| 1662 | bfd_get_filename (abfd), name); |
| 1663 | bfd_set_error (bfd_error_bad_value); |
| 1664 | goto error_return; |
| 1665 | } |
| 1666 | linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| 1667 | - enclosing->line_filepos); |
| 1668 | if (linoff < enclosing->lineno_count * linesz) |
| 1669 | { |
| 1670 | struct internal_lineno lin; |
| 1671 | bfd_byte *linpstart; |
| 1672 | |
| 1673 | linpstart = (reloc_info[enclosing->target_index].linenos |
| 1674 | + linoff); |
| 1675 | bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin); |
| 1676 | if (lin.l_lnno == 0 |
| 1677 | && ((bfd_size_type) lin.l_addr.l_symndx |
| 1678 | == ((esym |
| 1679 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1680 | / symesz))) |
| 1681 | { |
| 1682 | bfd_byte *linpend, *linp; |
| 1683 | |
| 1684 | linpend = (reloc_info[enclosing->target_index].linenos |
| 1685 | + enclosing->lineno_count * linesz); |
| 1686 | for (linp = linpstart + linesz; |
| 1687 | linp < linpend; |
| 1688 | linp += linesz) |
| 1689 | { |
| 1690 | bfd_coff_swap_lineno_in (abfd, (PTR) linp, |
| 1691 | (PTR) &lin); |
| 1692 | if (lin.l_lnno == 0) |
| 1693 | break; |
| 1694 | } |
| 1695 | csect->lineno_count += (linp - linpstart) / linesz; |
| 1696 | /* The setting of line_filepos will only be |
| 1697 | useful if all the line number entries for a |
| 1698 | csect are contiguous; this only matters for |
| 1699 | error reporting. */ |
| 1700 | if (csect->line_filepos == 0) |
| 1701 | csect->line_filepos = |
| 1702 | auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 1703 | } |
| 1704 | } |
| 1705 | } |
| 1706 | } |
| 1707 | |
| 1708 | /* Pick up the csect auxiliary information. */ |
| 1709 | |
| 1710 | if (sym.n_numaux == 0) |
| 1711 | { |
| 1712 | (*_bfd_error_handler) |
| 1713 | (_("%s: class %d symbol `%s' has no aux entries"), |
| 1714 | bfd_get_filename (abfd), sym.n_sclass, name); |
| 1715 | bfd_set_error (bfd_error_bad_value); |
| 1716 | goto error_return; |
| 1717 | } |
| 1718 | |
| 1719 | bfd_coff_swap_aux_in (abfd, |
| 1720 | (PTR) (esym + symesz * sym.n_numaux), |
| 1721 | sym.n_type, sym.n_sclass, |
| 1722 | sym.n_numaux - 1, sym.n_numaux, |
| 1723 | (PTR) &aux); |
| 1724 | |
| 1725 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| 1726 | |
| 1727 | flags = BSF_GLOBAL; |
| 1728 | section = NULL; |
| 1729 | value = 0; |
| 1730 | set_toc = NULL; |
| 1731 | |
| 1732 | switch (smtyp) |
| 1733 | { |
| 1734 | default: |
| 1735 | (*_bfd_error_handler) |
| 1736 | (_("%s: symbol `%s' has unrecognized csect type %d"), |
| 1737 | bfd_get_filename (abfd), name, smtyp); |
| 1738 | bfd_set_error (bfd_error_bad_value); |
| 1739 | goto error_return; |
| 1740 | |
| 1741 | case XTY_ER: |
| 1742 | /* This is an external reference. */ |
| 1743 | if (sym.n_sclass == C_HIDEXT |
| 1744 | || sym.n_scnum != N_UNDEF |
| 1745 | || aux.x_csect.x_scnlen.l != 0) |
| 1746 | { |
| 1747 | (*_bfd_error_handler) |
| 1748 | (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"), |
| 1749 | bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum, |
| 1750 | aux.x_csect.x_scnlen.l); |
| 1751 | bfd_set_error (bfd_error_bad_value); |
| 1752 | goto error_return; |
| 1753 | } |
| 1754 | |
| 1755 | /* An XMC_XO external reference is actually a reference to |
| 1756 | an absolute location. */ |
| 1757 | if (aux.x_csect.x_smclas != XMC_XO) |
| 1758 | section = bfd_und_section_ptr; |
| 1759 | else |
| 1760 | { |
| 1761 | section = bfd_abs_section_ptr; |
| 1762 | value = sym.n_value; |
| 1763 | } |
| 1764 | break; |
| 1765 | |
| 1766 | case XTY_SD: |
| 1767 | /* This is a csect definition. */ |
| 1768 | |
| 1769 | if (csect != NULL) |
| 1770 | { |
| 1771 | xcoff_section_data (abfd, csect)->last_symndx = |
| 1772 | ((esym |
| 1773 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1774 | / symesz); |
| 1775 | } |
| 1776 | |
| 1777 | csect = NULL; |
| 1778 | csect_index = -1; |
| 1779 | |
| 1780 | /* When we see a TOC anchor, we record the TOC value. */ |
| 1781 | if (aux.x_csect.x_smclas == XMC_TC0) |
| 1782 | { |
| 1783 | if (sym.n_sclass != C_HIDEXT |
| 1784 | || aux.x_csect.x_scnlen.l != 0) |
| 1785 | { |
| 1786 | (*_bfd_error_handler) |
| 1787 | (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"), |
| 1788 | bfd_get_filename (abfd), name, sym.n_sclass, |
| 1789 | aux.x_csect.x_scnlen.l); |
| 1790 | bfd_set_error (bfd_error_bad_value); |
| 1791 | goto error_return; |
| 1792 | } |
| 1793 | xcoff_data (abfd)->toc = sym.n_value; |
| 1794 | } |
| 1795 | |
| 1796 | /* We must merge TOC entries for the same symbol. We can |
| 1797 | merge two TOC entries if they are both C_HIDEXT, they |
| 1798 | both have the same name, they are both 4 bytes long, and |
| 1799 | they both have a relocation table entry for an external |
| 1800 | symbol with the same name. Unfortunately, this means |
| 1801 | that we must look through the relocations. Ick. */ |
| 1802 | if (aux.x_csect.x_smclas == XMC_TC |
| 1803 | && sym.n_sclass == C_HIDEXT |
| 1804 | && aux.x_csect.x_scnlen.l == 4 |
| 1805 | && info->hash->creator == abfd->xvec) |
| 1806 | { |
| 1807 | asection *enclosing; |
| 1808 | struct internal_reloc *relocs; |
| 1809 | bfd_size_type relindx; |
| 1810 | struct internal_reloc *rel; |
| 1811 | |
| 1812 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1813 | if (enclosing == NULL) |
| 1814 | goto error_return; |
| 1815 | |
| 1816 | relocs = reloc_info[enclosing->target_index].relocs; |
| 1817 | relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, |
| 1818 | sym.n_value); |
| 1819 | rel = relocs + relindx; |
| 1820 | if (relindx < enclosing->reloc_count |
| 1821 | && rel->r_vaddr == (bfd_vma) sym.n_value |
| 1822 | && rel->r_size == 31 |
| 1823 | && rel->r_type == R_POS) |
| 1824 | { |
| 1825 | bfd_byte *erelsym; |
| 1826 | struct internal_syment relsym; |
| 1827 | |
| 1828 | erelsym = ((bfd_byte *) obj_coff_external_syms (abfd) |
| 1829 | + rel->r_symndx * symesz); |
| 1830 | bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym); |
| 1831 | if (relsym.n_sclass == C_EXT) |
| 1832 | { |
| 1833 | const char *relname; |
| 1834 | char relbuf[SYMNMLEN + 1]; |
| 1835 | boolean copy; |
| 1836 | struct xcoff_link_hash_entry *h; |
| 1837 | |
| 1838 | /* At this point we know that the TOC entry is |
| 1839 | for an externally visible symbol. */ |
| 1840 | relname = _bfd_coff_internal_syment_name (abfd, &relsym, |
| 1841 | relbuf); |
| 1842 | if (relname == NULL) |
| 1843 | goto error_return; |
| 1844 | |
| 1845 | /* We only merge TOC entries if the TC name is |
| 1846 | the same as the symbol name. This handles |
| 1847 | the normal case, but not common cases like |
| 1848 | SYM.P4 which gcc generates to store SYM + 4 |
| 1849 | in the TOC. FIXME. */ |
| 1850 | if (strcmp (name, relname) == 0) |
| 1851 | { |
| 1852 | copy = (! info->keep_memory |
| 1853 | || relsym._n._n_n._n_zeroes != 0 |
| 1854 | || relsym._n._n_n._n_offset == 0); |
| 1855 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 1856 | relname, true, copy, |
| 1857 | false); |
| 1858 | if (h == NULL) |
| 1859 | goto error_return; |
| 1860 | |
| 1861 | /* At this point h->root.type could be |
| 1862 | bfd_link_hash_new. That should be OK, |
| 1863 | since we know for sure that we will come |
| 1864 | across this symbol as we step through the |
| 1865 | file. */ |
| 1866 | |
| 1867 | /* We store h in *sym_hash for the |
| 1868 | convenience of the relocate_section |
| 1869 | function. */ |
| 1870 | *sym_hash = h; |
| 1871 | |
| 1872 | if (h->toc_section != NULL) |
| 1873 | { |
| 1874 | asection **rel_csects; |
| 1875 | |
| 1876 | /* We already have a TOC entry for this |
| 1877 | symbol, so we can just ignore this |
| 1878 | one. */ |
| 1879 | rel_csects = |
| 1880 | reloc_info[enclosing->target_index].csects; |
| 1881 | rel_csects[relindx] = bfd_und_section_ptr; |
| 1882 | break; |
| 1883 | } |
| 1884 | |
| 1885 | /* We are about to create a TOC entry for |
| 1886 | this symbol. */ |
| 1887 | set_toc = h; |
| 1888 | } |
| 1889 | } |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | /* We need to create a new section. We get the name from |
| 1894 | the csect storage mapping class, so that the linker can |
| 1895 | accumulate similar csects together. */ |
| 1896 | { |
| 1897 | static const char *csect_name_by_class[] = |
| 1898 | { |
| 1899 | ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo", |
| 1900 | ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0", |
| 1901 | ".td" |
| 1902 | }; |
| 1903 | const char *csect_name; |
| 1904 | asection *enclosing; |
| 1905 | |
| 1906 | if ((aux.x_csect.x_smclas >= |
| 1907 | sizeof csect_name_by_class / sizeof csect_name_by_class[0]) |
| 1908 | || csect_name_by_class[aux.x_csect.x_smclas] == NULL) |
| 1909 | { |
| 1910 | (*_bfd_error_handler) |
| 1911 | (_("%s: symbol `%s' has unrecognized smclas %d"), |
| 1912 | bfd_get_filename (abfd), name, aux.x_csect.x_smclas); |
| 1913 | bfd_set_error (bfd_error_bad_value); |
| 1914 | goto error_return; |
| 1915 | } |
| 1916 | |
| 1917 | csect_name = csect_name_by_class[aux.x_csect.x_smclas]; |
| 1918 | csect = bfd_make_section_anyway (abfd, csect_name); |
| 1919 | if (csect == NULL) |
| 1920 | goto error_return; |
| 1921 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| 1922 | if (enclosing == NULL) |
| 1923 | goto error_return; |
| 1924 | if (! bfd_is_abs_section (enclosing) |
| 1925 | && ((bfd_vma) sym.n_value < enclosing->vma |
| 1926 | || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l |
| 1927 | > enclosing->vma + enclosing->_raw_size))) |
| 1928 | { |
| 1929 | (*_bfd_error_handler) |
| 1930 | (_("%s: csect `%s' not in enclosing section"), |
| 1931 | bfd_get_filename (abfd), name); |
| 1932 | bfd_set_error (bfd_error_bad_value); |
| 1933 | goto error_return; |
| 1934 | } |
| 1935 | csect->vma = sym.n_value; |
| 1936 | csect->filepos = (enclosing->filepos |
| 1937 | + sym.n_value |
| 1938 | - enclosing->vma); |
| 1939 | csect->_raw_size = aux.x_csect.x_scnlen.l; |
| 1940 | csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; |
| 1941 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| 1942 | |
| 1943 | /* Record the enclosing section in the tdata for this new |
| 1944 | section. */ |
| 1945 | csect->used_by_bfd = |
| 1946 | (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); |
| 1947 | if (csect->used_by_bfd == NULL) |
| 1948 | goto error_return; |
| 1949 | coff_section_data (abfd, csect)->tdata = |
| 1950 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); |
| 1951 | if (coff_section_data (abfd, csect)->tdata == NULL) |
| 1952 | goto error_return; |
| 1953 | xcoff_section_data (abfd, csect)->enclosing = enclosing; |
| 1954 | xcoff_section_data (abfd, csect)->lineno_count = |
| 1955 | enclosing->lineno_count; |
| 1956 | |
| 1957 | if (enclosing->owner == abfd) |
| 1958 | { |
| 1959 | struct internal_reloc *relocs; |
| 1960 | bfd_size_type relindx; |
| 1961 | struct internal_reloc *rel; |
| 1962 | asection **rel_csect; |
| 1963 | |
| 1964 | relocs = reloc_info[enclosing->target_index].relocs; |
| 1965 | relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, |
| 1966 | csect->vma); |
| 1967 | rel = relocs + relindx; |
| 1968 | rel_csect = (reloc_info[enclosing->target_index].csects |
| 1969 | + relindx); |
| 1970 | csect->rel_filepos = (enclosing->rel_filepos |
| 1971 | + relindx * bfd_coff_relsz (abfd)); |
| 1972 | while (relindx < enclosing->reloc_count |
| 1973 | && *rel_csect == NULL |
| 1974 | && rel->r_vaddr < csect->vma + csect->_raw_size) |
| 1975 | { |
| 1976 | *rel_csect = csect; |
| 1977 | csect->flags |= SEC_RELOC; |
| 1978 | ++csect->reloc_count; |
| 1979 | ++relindx; |
| 1980 | ++rel; |
| 1981 | ++rel_csect; |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | /* There are a number of other fields and section flags |
| 1986 | which we do not bother to set. */ |
| 1987 | |
| 1988 | csect_index = ((esym |
| 1989 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 1990 | / symesz); |
| 1991 | |
| 1992 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| 1993 | |
| 1994 | if (first_csect == NULL) |
| 1995 | first_csect = csect; |
| 1996 | |
| 1997 | /* If this symbol is C_EXT, we treat it as starting at the |
| 1998 | beginning of the newly created section. */ |
| 1999 | if (sym.n_sclass == C_EXT) |
| 2000 | { |
| 2001 | section = csect; |
| 2002 | value = 0; |
| 2003 | } |
| 2004 | |
| 2005 | /* If this is a TOC section for a symbol, record it. */ |
| 2006 | if (set_toc != NULL) |
| 2007 | set_toc->toc_section = csect; |
| 2008 | } |
| 2009 | break; |
| 2010 | |
| 2011 | case XTY_LD: |
| 2012 | /* This is a label definition. The x_scnlen field is the |
| 2013 | symbol index of the csect. I believe that this must |
| 2014 | always follow the appropriate XTY_SD symbol, so I will |
| 2015 | insist on it. */ |
| 2016 | { |
| 2017 | boolean bad; |
| 2018 | |
| 2019 | bad = false; |
| 2020 | if (aux.x_csect.x_scnlen.l < 0 |
| 2021 | || (aux.x_csect.x_scnlen.l |
| 2022 | >= esym - (bfd_byte *) obj_coff_external_syms (abfd))) |
| 2023 | bad = true; |
| 2024 | if (! bad) |
| 2025 | { |
| 2026 | section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l]; |
| 2027 | if (section == NULL |
| 2028 | || (section->flags & SEC_HAS_CONTENTS) == 0) |
| 2029 | bad = true; |
| 2030 | } |
| 2031 | if (bad) |
| 2032 | { |
| 2033 | (*_bfd_error_handler) |
| 2034 | (_("%s: misplaced XTY_LD `%s'"), |
| 2035 | bfd_get_filename (abfd), name); |
| 2036 | bfd_set_error (bfd_error_bad_value); |
| 2037 | goto error_return; |
| 2038 | } |
| 2039 | |
| 2040 | value = sym.n_value - csect->vma; |
| 2041 | } |
| 2042 | break; |
| 2043 | |
| 2044 | case XTY_CM: |
| 2045 | /* This is an unitialized csect. We could base the name on |
| 2046 | the storage mapping class, but we don't bother except for |
| 2047 | an XMC_TD symbol. If this csect is externally visible, |
| 2048 | it is a common symbol. We put XMC_TD symbols in sections |
| 2049 | named .tocbss, and rely on the linker script to put that |
| 2050 | in the TOC area. */ |
| 2051 | |
| 2052 | if (csect != NULL) |
| 2053 | { |
| 2054 | xcoff_section_data (abfd, csect)->last_symndx = |
| 2055 | ((esym |
| 2056 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 2057 | / symesz); |
| 2058 | } |
| 2059 | |
| 2060 | if (aux.x_csect.x_smclas == XMC_TD) |
| 2061 | csect = bfd_make_section_anyway (abfd, ".tocbss"); |
| 2062 | else |
| 2063 | csect = bfd_make_section_anyway (abfd, ".bss"); |
| 2064 | if (csect == NULL) |
| 2065 | goto error_return; |
| 2066 | csect->vma = sym.n_value; |
| 2067 | csect->_raw_size = aux.x_csect.x_scnlen.l; |
| 2068 | csect->flags |= SEC_ALLOC; |
| 2069 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| 2070 | /* There are a number of other fields and section flags |
| 2071 | which we do not bother to set. */ |
| 2072 | |
| 2073 | csect_index = ((esym |
| 2074 | - (bfd_byte *) obj_coff_external_syms (abfd)) |
| 2075 | / symesz); |
| 2076 | |
| 2077 | csect->used_by_bfd = |
| 2078 | (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); |
| 2079 | if (csect->used_by_bfd == NULL) |
| 2080 | goto error_return; |
| 2081 | coff_section_data (abfd, csect)->tdata = |
| 2082 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); |
| 2083 | if (coff_section_data (abfd, csect)->tdata == NULL) |
| 2084 | goto error_return; |
| 2085 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| 2086 | |
| 2087 | if (first_csect == NULL) |
| 2088 | first_csect = csect; |
| 2089 | |
| 2090 | if (sym.n_sclass == C_EXT) |
| 2091 | { |
| 2092 | csect->flags |= SEC_IS_COMMON; |
| 2093 | csect->_raw_size = 0; |
| 2094 | section = csect; |
| 2095 | value = aux.x_csect.x_scnlen.l; |
| 2096 | } |
| 2097 | |
| 2098 | break; |
| 2099 | } |
| 2100 | |
| 2101 | /* Check for magic symbol names. */ |
| 2102 | if ((smtyp == XTY_SD || smtyp == XTY_CM) |
| 2103 | && aux.x_csect.x_smclas != XMC_TC |
| 2104 | && aux.x_csect.x_smclas != XMC_TD) |
| 2105 | { |
| 2106 | int i; |
| 2107 | |
| 2108 | i = -1; |
| 2109 | if (name[0] == '_') |
| 2110 | { |
| 2111 | if (strcmp (name, "_text") == 0) |
| 2112 | i = 0; |
| 2113 | else if (strcmp (name, "_etext") == 0) |
| 2114 | i = 1; |
| 2115 | else if (strcmp (name, "_data") == 0) |
| 2116 | i = 2; |
| 2117 | else if (strcmp (name, "_edata") == 0) |
| 2118 | i = 3; |
| 2119 | else if (strcmp (name, "_end") == 0) |
| 2120 | i = 4; |
| 2121 | } |
| 2122 | else if (name[0] == 'e' && strcmp (name, "end") == 0) |
| 2123 | i = 5; |
| 2124 | |
| 2125 | if (i != -1) |
| 2126 | xcoff_hash_table (info)->special_sections[i] = csect; |
| 2127 | } |
| 2128 | |
| 2129 | /* Now we have enough information to add the symbol to the |
| 2130 | linker hash table. */ |
| 2131 | |
| 2132 | if (sym.n_sclass == C_EXT) |
| 2133 | { |
| 2134 | boolean copy; |
| 2135 | |
| 2136 | BFD_ASSERT (section != NULL); |
| 2137 | |
| 2138 | /* We must copy the name into memory if we got it from the |
| 2139 | syment itself, rather than the string table. */ |
| 2140 | copy = default_copy; |
| 2141 | if (sym._n._n_n._n_zeroes != 0 |
| 2142 | || sym._n._n_n._n_offset == 0) |
| 2143 | copy = true; |
| 2144 | |
| 2145 | /* The AIX linker appears to only detect multiple symbol |
| 2146 | definitions when there is a reference to the symbol. If |
| 2147 | a symbol is defined multiple times, and the only |
| 2148 | references are from the same object file, the AIX linker |
| 2149 | appears to permit it. It does not merge the different |
| 2150 | definitions, but handles them independently. On the |
| 2151 | other hand, if there is a reference, the linker reports |
| 2152 | an error. |
| 2153 | |
| 2154 | This matters because the AIX <net/net_globals.h> header |
| 2155 | file actually defines an initialized array, so we have to |
| 2156 | actually permit that to work. |
| 2157 | |
| 2158 | Just to make matters even more confusing, the AIX linker |
| 2159 | appears to permit multiple symbol definitions whenever |
| 2160 | the second definition is in an archive rather than an |
| 2161 | object file. This may be a consequence of the manner in |
| 2162 | which it handles archives: I think it may load the entire |
| 2163 | archive in as separate csects, and then let garbage |
| 2164 | collection discard symbols. |
| 2165 | |
| 2166 | We also have to handle the case of statically linking a |
| 2167 | shared object, which will cause symbol redefinitions, |
| 2168 | although this is an easier case to detect. */ |
| 2169 | |
| 2170 | if (info->hash->creator == abfd->xvec) |
| 2171 | { |
| 2172 | if (! bfd_is_und_section (section)) |
| 2173 | *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 2174 | name, true, copy, false); |
| 2175 | else |
| 2176 | *sym_hash = ((struct xcoff_link_hash_entry *) |
| 2177 | bfd_wrapped_link_hash_lookup (abfd, info, name, |
| 2178 | true, copy, false)); |
| 2179 | if (*sym_hash == NULL) |
| 2180 | goto error_return; |
| 2181 | if (((*sym_hash)->root.type == bfd_link_hash_defined |
| 2182 | || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| 2183 | && ! bfd_is_und_section (section) |
| 2184 | && ! bfd_is_com_section (section)) |
| 2185 | { |
| 2186 | /* This is a second definition of a defined symbol. */ |
| 2187 | if ((abfd->flags & DYNAMIC) != 0 |
| 2188 | && ((*sym_hash)->smclas != XMC_GL |
| 2189 | || aux.x_csect.x_smclas == XMC_GL |
| 2190 | || ((*sym_hash)->root.u.def.section->owner->flags |
| 2191 | & DYNAMIC) == 0)) |
| 2192 | { |
| 2193 | /* The new symbol is from a shared library, and |
| 2194 | either the existing symbol is not global |
| 2195 | linkage code or this symbol is global linkage |
| 2196 | code. If the existing symbol is global |
| 2197 | linkage code and the new symbol is not, then |
| 2198 | we want to use the new symbol. */ |
| 2199 | section = bfd_und_section_ptr; |
| 2200 | value = 0; |
| 2201 | } |
| 2202 | else if (((*sym_hash)->root.u.def.section->owner->flags |
| 2203 | & DYNAMIC) != 0) |
| 2204 | { |
| 2205 | /* The existing symbol is from a shared library. |
| 2206 | Replace it. */ |
| 2207 | (*sym_hash)->root.type = bfd_link_hash_undefined; |
| 2208 | (*sym_hash)->root.u.undef.abfd = |
| 2209 | (*sym_hash)->root.u.def.section->owner; |
| 2210 | } |
| 2211 | else if (abfd->my_archive != NULL) |
| 2212 | { |
| 2213 | /* This is a redefinition in an object contained |
| 2214 | in an archive. Just ignore it. See the |
| 2215 | comment above. */ |
| 2216 | section = bfd_und_section_ptr; |
| 2217 | value = 0; |
| 2218 | } |
| 2219 | else if ((*sym_hash)->root.next != NULL |
| 2220 | || info->hash->undefs_tail == &(*sym_hash)->root) |
| 2221 | { |
| 2222 | /* This symbol has been referenced. In this |
| 2223 | case, we just continue and permit the |
| 2224 | multiple definition error. See the comment |
| 2225 | above about the behaviour of the AIX linker. */ |
| 2226 | } |
| 2227 | else if ((*sym_hash)->smclas == aux.x_csect.x_smclas) |
| 2228 | { |
| 2229 | /* The symbols are both csects of the same |
| 2230 | class. There is at least a chance that this |
| 2231 | is a semi-legitimate redefinition. */ |
| 2232 | section = bfd_und_section_ptr; |
| 2233 | value = 0; |
| 2234 | (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED; |
| 2235 | } |
| 2236 | } |
| 2237 | else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0 |
| 2238 | && ((*sym_hash)->root.type == bfd_link_hash_defined |
| 2239 | || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| 2240 | && (bfd_is_und_section (section) |
| 2241 | || bfd_is_com_section (section))) |
| 2242 | { |
| 2243 | /* This is a reference to a multiply defined symbol. |
| 2244 | Report the error now. See the comment above |
| 2245 | about the behaviour of the AIX linker. We could |
| 2246 | also do this with warning symbols, but I'm not |
| 2247 | sure the XCOFF linker is wholly prepared to |
| 2248 | handle them, and that would only be a warning, |
| 2249 | not an error. */ |
| 2250 | if (! ((*info->callbacks->multiple_definition) |
| 2251 | (info, (*sym_hash)->root.root.string, |
| 2252 | (bfd *) NULL, (asection *) NULL, 0, |
| 2253 | (*sym_hash)->root.u.def.section->owner, |
| 2254 | (*sym_hash)->root.u.def.section, |
| 2255 | (*sym_hash)->root.u.def.value))) |
| 2256 | goto error_return; |
| 2257 | /* Try not to give this error too many times. */ |
| 2258 | (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED; |
| 2259 | } |
| 2260 | } |
| 2261 | |
| 2262 | /* _bfd_generic_link_add_one_symbol may call the linker to |
| 2263 | generate an error message, and the linker may try to read |
| 2264 | the symbol table to give a good error. Right now, the |
| 2265 | line numbers are in an inconsistent state, since they are |
| 2266 | counted both in the real sections and in the new csects. |
| 2267 | We need to leave the count in the real sections so that |
| 2268 | the linker can report the line number of the error |
| 2269 | correctly, so temporarily clobber the link to the csects |
| 2270 | so that the linker will not try to read the line numbers |
| 2271 | a second time from the csects. */ |
| 2272 | BFD_ASSERT (last_real->next == first_csect); |
| 2273 | last_real->next = NULL; |
| 2274 | if (! (_bfd_generic_link_add_one_symbol |
| 2275 | (info, abfd, name, flags, section, value, |
| 2276 | (const char *) NULL, copy, true, |
| 2277 | (struct bfd_link_hash_entry **) sym_hash))) |
| 2278 | goto error_return; |
| 2279 | last_real->next = first_csect; |
| 2280 | |
| 2281 | if (smtyp == XTY_CM) |
| 2282 | { |
| 2283 | if ((*sym_hash)->root.type != bfd_link_hash_common |
| 2284 | || (*sym_hash)->root.u.c.p->section != csect) |
| 2285 | { |
| 2286 | /* We don't need the common csect we just created. */ |
| 2287 | csect->_raw_size = 0; |
| 2288 | } |
| 2289 | else |
| 2290 | { |
| 2291 | (*sym_hash)->root.u.c.p->alignment_power |
| 2292 | = csect->alignment_power; |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | if (info->hash->creator == abfd->xvec) |
| 2297 | { |
| 2298 | int flag; |
| 2299 | |
| 2300 | if (smtyp == XTY_ER || smtyp == XTY_CM) |
| 2301 | flag = XCOFF_REF_REGULAR; |
| 2302 | else |
| 2303 | flag = XCOFF_DEF_REGULAR; |
| 2304 | (*sym_hash)->flags |= flag; |
| 2305 | |
| 2306 | if ((*sym_hash)->smclas == XMC_UA |
| 2307 | || flag == XCOFF_DEF_REGULAR) |
| 2308 | (*sym_hash)->smclas = aux.x_csect.x_smclas; |
| 2309 | } |
| 2310 | } |
| 2311 | |
| 2312 | *csect_cache = csect; |
| 2313 | |
| 2314 | esym += (sym.n_numaux + 1) * symesz; |
| 2315 | sym_hash += sym.n_numaux + 1; |
| 2316 | csect_cache += sym.n_numaux + 1; |
| 2317 | } |
| 2318 | |
| 2319 | BFD_ASSERT (last_real == NULL || last_real->next == first_csect); |
| 2320 | |
| 2321 | /* Make sure that we have seen all the relocs. */ |
| 2322 | for (o = abfd->sections; o != first_csect; o = o->next) |
| 2323 | { |
| 2324 | /* Reset the section size and the line number count, since the |
| 2325 | data is now attached to the csects. Don't reset the size of |
| 2326 | the .debug section, since we need to read it below in |
| 2327 | bfd_xcoff_size_dynamic_sections. */ |
| 2328 | if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0) |
| 2329 | o->_raw_size = 0; |
| 2330 | o->lineno_count = 0; |
| 2331 | |
| 2332 | if ((o->flags & SEC_RELOC) != 0) |
| 2333 | { |
| 2334 | bfd_size_type i; |
| 2335 | struct internal_reloc *rel; |
| 2336 | asection **rel_csect; |
| 2337 | |
| 2338 | rel = reloc_info[o->target_index].relocs; |
| 2339 | rel_csect = reloc_info[o->target_index].csects; |
| 2340 | for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++) |
| 2341 | { |
| 2342 | if (*rel_csect == NULL) |
| 2343 | { |
| 2344 | (*_bfd_error_handler) |
| 2345 | (_("%s: reloc %s:%d not in csect"), |
| 2346 | bfd_get_filename (abfd), o->name, i); |
| 2347 | bfd_set_error (bfd_error_bad_value); |
| 2348 | goto error_return; |
| 2349 | } |
| 2350 | |
| 2351 | /* We identify all symbols which are called, so that we |
| 2352 | can create glue code for calls to functions imported |
| 2353 | from dynamic objects. */ |
| 2354 | if (info->hash->creator == abfd->xvec |
| 2355 | && *rel_csect != bfd_und_section_ptr |
| 2356 | && (rel->r_type == R_BR |
| 2357 | || rel->r_type == R_RBR) |
| 2358 | && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL) |
| 2359 | { |
| 2360 | struct xcoff_link_hash_entry *h; |
| 2361 | |
| 2362 | h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; |
| 2363 | h->flags |= XCOFF_CALLED; |
| 2364 | /* If the symbol name starts with a period, it is |
| 2365 | the code of a function. If the symbol is |
| 2366 | currently undefined, then add an undefined symbol |
| 2367 | for the function descriptor. This should do no |
| 2368 | harm, because any regular object that defines the |
| 2369 | function should also define the function |
| 2370 | descriptor. It helps, because it means that we |
| 2371 | will identify the function descriptor with a |
| 2372 | dynamic object if a dynamic object defines it. */ |
| 2373 | if (h->root.root.string[0] == '.' |
| 2374 | && h->descriptor == NULL) |
| 2375 | { |
| 2376 | struct xcoff_link_hash_entry *hds; |
| 2377 | |
| 2378 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 2379 | h->root.root.string + 1, |
| 2380 | true, false, true); |
| 2381 | if (hds == NULL) |
| 2382 | goto error_return; |
| 2383 | if (hds->root.type == bfd_link_hash_new) |
| 2384 | { |
| 2385 | if (! (_bfd_generic_link_add_one_symbol |
| 2386 | (info, abfd, hds->root.root.string, |
| 2387 | (flagword) 0, bfd_und_section_ptr, |
| 2388 | (bfd_vma) 0, (const char *) NULL, false, |
| 2389 | true, |
| 2390 | (struct bfd_link_hash_entry **) &hds))) |
| 2391 | goto error_return; |
| 2392 | } |
| 2393 | hds->flags |= XCOFF_DESCRIPTOR; |
| 2394 | BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 |
| 2395 | && (h->flags & XCOFF_DESCRIPTOR) == 0); |
| 2396 | hds->descriptor = h; |
| 2397 | h->descriptor = hds; |
| 2398 | } |
| 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | free (reloc_info[o->target_index].csects); |
| 2403 | reloc_info[o->target_index].csects = NULL; |
| 2404 | |
| 2405 | /* Reset SEC_RELOC and the reloc_count, since the reloc |
| 2406 | information is now attached to the csects. */ |
| 2407 | o->flags &=~ SEC_RELOC; |
| 2408 | o->reloc_count = 0; |
| 2409 | |
| 2410 | /* If we are not keeping memory, free the reloc information. */ |
| 2411 | if (! info->keep_memory |
| 2412 | && coff_section_data (abfd, o) != NULL |
| 2413 | && coff_section_data (abfd, o)->relocs != NULL |
| 2414 | && ! coff_section_data (abfd, o)->keep_relocs) |
| 2415 | { |
| 2416 | free (coff_section_data (abfd, o)->relocs); |
| 2417 | coff_section_data (abfd, o)->relocs = NULL; |
| 2418 | } |
| 2419 | } |
| 2420 | |
| 2421 | /* Free up the line numbers. FIXME: We could cache these |
| 2422 | somewhere for the final link, to avoid reading them again. */ |
| 2423 | if (reloc_info[o->target_index].linenos != NULL) |
| 2424 | { |
| 2425 | free (reloc_info[o->target_index].linenos); |
| 2426 | reloc_info[o->target_index].linenos = NULL; |
| 2427 | } |
| 2428 | } |
| 2429 | |
| 2430 | free (reloc_info); |
| 2431 | |
| 2432 | obj_coff_keep_syms (abfd) = keep_syms; |
| 2433 | |
| 2434 | return true; |
| 2435 | |
| 2436 | error_return: |
| 2437 | if (reloc_info != NULL) |
| 2438 | { |
| 2439 | for (o = abfd->sections; o != NULL; o = o->next) |
| 2440 | { |
| 2441 | if (reloc_info[o->target_index].csects != NULL) |
| 2442 | free (reloc_info[o->target_index].csects); |
| 2443 | if (reloc_info[o->target_index].linenos != NULL) |
| 2444 | free (reloc_info[o->target_index].linenos); |
| 2445 | } |
| 2446 | free (reloc_info); |
| 2447 | } |
| 2448 | obj_coff_keep_syms (abfd) = keep_syms; |
| 2449 | return false; |
| 2450 | } |
| 2451 | |
| 2452 | #undef N_TMASK |
| 2453 | #undef N_BTSHFT |
| 2454 | |
| 2455 | /* This function is used to add symbols from a dynamic object to the |
| 2456 | global symbol table. */ |
| 2457 | |
| 2458 | static boolean |
| 2459 | xcoff_link_add_dynamic_symbols (abfd, info) |
| 2460 | bfd *abfd; |
| 2461 | struct bfd_link_info *info; |
| 2462 | { |
| 2463 | asection *lsec; |
| 2464 | bfd_byte *buf; |
| 2465 | struct internal_ldhdr ldhdr; |
| 2466 | const char *strings; |
| 2467 | struct external_ldsym *elsym, *elsymend; |
| 2468 | struct xcoff_import_file *n; |
| 2469 | const char *bname; |
| 2470 | const char *mname; |
| 2471 | const char *s; |
| 2472 | unsigned int c; |
| 2473 | struct xcoff_import_file **pp; |
| 2474 | |
| 2475 | /* We can only handle a dynamic object if we are generating an XCOFF |
| 2476 | output file. */ |
| 2477 | if (info->hash->creator != abfd->xvec) |
| 2478 | { |
| 2479 | (*_bfd_error_handler) |
| 2480 | (_("%s: XCOFF shared object when not producing XCOFF output"), |
| 2481 | bfd_get_filename (abfd)); |
| 2482 | bfd_set_error (bfd_error_invalid_operation); |
| 2483 | return false; |
| 2484 | } |
| 2485 | |
| 2486 | /* The symbols we use from a dynamic object are not the symbols in |
| 2487 | the normal symbol table, but, rather, the symbols in the export |
| 2488 | table. If there is a global symbol in a dynamic object which is |
| 2489 | not in the export table, the loader will not be able to find it, |
| 2490 | so we don't want to find it either. Also, on AIX 4.1.3, shr.o in |
| 2491 | libc.a has symbols in the export table which are not in the |
| 2492 | symbol table. */ |
| 2493 | |
| 2494 | /* Read in the .loader section. FIXME: We should really use the |
| 2495 | o_snloader field in the a.out header, rather than grabbing the |
| 2496 | section by name. */ |
| 2497 | lsec = bfd_get_section_by_name (abfd, ".loader"); |
| 2498 | if (lsec == NULL) |
| 2499 | { |
| 2500 | (*_bfd_error_handler) |
| 2501 | (_("%s: dynamic object with no .loader section"), |
| 2502 | bfd_get_filename (abfd)); |
| 2503 | bfd_set_error (bfd_error_no_symbols); |
| 2504 | return false; |
| 2505 | } |
| 2506 | |
| 2507 | if (! xcoff_get_section_contents (abfd, lsec)) |
| 2508 | return false; |
| 2509 | buf = coff_section_data (abfd, lsec)->contents; |
| 2510 | |
| 2511 | /* Remove the sections from this object, so that they do not get |
| 2512 | included in the link. */ |
| 2513 | abfd->sections = NULL; |
| 2514 | |
| 2515 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); |
| 2516 | |
| 2517 | strings = (char *) buf + ldhdr.l_stoff; |
| 2518 | |
| 2519 | elsym = (struct external_ldsym *) (buf + LDHDRSZ); |
| 2520 | elsymend = elsym + ldhdr.l_nsyms; |
| 2521 | BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ); |
| 2522 | for (; elsym < elsymend; elsym++) |
| 2523 | { |
| 2524 | struct internal_ldsym ldsym; |
| 2525 | char nambuf[SYMNMLEN + 1]; |
| 2526 | const char *name; |
| 2527 | struct xcoff_link_hash_entry *h; |
| 2528 | |
| 2529 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| 2530 | |
| 2531 | /* We are only interested in exported symbols. */ |
| 2532 | if ((ldsym.l_smtype & L_EXPORT) == 0) |
| 2533 | continue; |
| 2534 | |
| 2535 | if (ldsym._l._l_l._l_zeroes == 0) |
| 2536 | name = strings + ldsym._l._l_l._l_offset; |
| 2537 | else |
| 2538 | { |
| 2539 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| 2540 | nambuf[SYMNMLEN] = '\0'; |
| 2541 | name = nambuf; |
| 2542 | } |
| 2543 | |
| 2544 | /* Normally we could not call xcoff_link_hash_lookup in an add |
| 2545 | symbols routine, since we might not be using an XCOFF hash |
| 2546 | table. However, we verified above that we are using an XCOFF |
| 2547 | hash table. */ |
| 2548 | |
| 2549 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, |
| 2550 | true, true); |
| 2551 | if (h == NULL) |
| 2552 | return false; |
| 2553 | |
| 2554 | h->flags |= XCOFF_DEF_DYNAMIC; |
| 2555 | |
| 2556 | /* If the symbol is undefined, and the BFD it was found in is |
| 2557 | not a dynamic object, change the BFD to this dynamic object, |
| 2558 | so that we can get the correct import file ID. */ |
| 2559 | if ((h->root.type == bfd_link_hash_undefined |
| 2560 | || h->root.type == bfd_link_hash_undefweak) |
| 2561 | && (h->root.u.undef.abfd == NULL |
| 2562 | || (h->root.u.undef.abfd->flags & DYNAMIC) == 0)) |
| 2563 | h->root.u.undef.abfd = abfd; |
| 2564 | |
| 2565 | if (h->root.type == bfd_link_hash_new) |
| 2566 | { |
| 2567 | h->root.type = bfd_link_hash_undefined; |
| 2568 | h->root.u.undef.abfd = abfd; |
| 2569 | /* We do not want to add this to the undefined symbol list. */ |
| 2570 | } |
| 2571 | |
| 2572 | if (h->smclas == XMC_UA |
| 2573 | || h->root.type == bfd_link_hash_undefined |
| 2574 | || h->root.type == bfd_link_hash_undefweak) |
| 2575 | h->smclas = ldsym.l_smclas; |
| 2576 | |
| 2577 | /* Unless this is an XMC_XO symbol, we don't bother to actually |
| 2578 | define it, since we don't have a section to put it in anyhow. |
| 2579 | Instead, the relocation routines handle the DEF_DYNAMIC flag |
| 2580 | correctly. */ |
| 2581 | |
| 2582 | if (h->smclas == XMC_XO |
| 2583 | && (h->root.type == bfd_link_hash_undefined |
| 2584 | || h->root.type == bfd_link_hash_undefweak)) |
| 2585 | { |
| 2586 | /* This symbol has an absolute value. */ |
| 2587 | h->root.type = bfd_link_hash_defined; |
| 2588 | h->root.u.def.section = bfd_abs_section_ptr; |
| 2589 | h->root.u.def.value = ldsym.l_value; |
| 2590 | } |
| 2591 | |
| 2592 | /* If this symbol defines a function descriptor, then it |
| 2593 | implicitly defines the function code as well. */ |
| 2594 | if (h->smclas == XMC_DS |
| 2595 | || (h->smclas == XMC_XO && name[0] != '.')) |
| 2596 | h->flags |= XCOFF_DESCRIPTOR; |
| 2597 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| 2598 | { |
| 2599 | struct xcoff_link_hash_entry *hds; |
| 2600 | |
| 2601 | hds = h->descriptor; |
| 2602 | if (hds == NULL) |
| 2603 | { |
| 2604 | char *dsnm; |
| 2605 | |
| 2606 | dsnm = bfd_malloc (strlen (name) + 2); |
| 2607 | if (dsnm == NULL) |
| 2608 | return false; |
| 2609 | dsnm[0] = '.'; |
| 2610 | strcpy (dsnm + 1, name); |
| 2611 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm, |
| 2612 | true, true, true); |
| 2613 | free (dsnm); |
| 2614 | if (hds == NULL) |
| 2615 | return false; |
| 2616 | |
| 2617 | if (hds->root.type == bfd_link_hash_new) |
| 2618 | { |
| 2619 | hds->root.type = bfd_link_hash_undefined; |
| 2620 | hds->root.u.undef.abfd = abfd; |
| 2621 | /* We do not want to add this to the undefined |
| 2622 | symbol list. */ |
| 2623 | } |
| 2624 | |
| 2625 | hds->descriptor = h; |
| 2626 | h->descriptor = hds; |
| 2627 | } |
| 2628 | |
| 2629 | hds->flags |= XCOFF_DEF_DYNAMIC; |
| 2630 | if (hds->smclas == XMC_UA) |
| 2631 | hds->smclas = XMC_PR; |
| 2632 | |
| 2633 | /* An absolute symbol appears to actually define code, not a |
| 2634 | function descriptor. This is how some math functions are |
| 2635 | implemented on AIX 4.1. */ |
| 2636 | if (h->smclas == XMC_XO |
| 2637 | && (hds->root.type == bfd_link_hash_undefined |
| 2638 | || hds->root.type == bfd_link_hash_undefweak)) |
| 2639 | { |
| 2640 | hds->smclas = XMC_XO; |
| 2641 | hds->root.type = bfd_link_hash_defined; |
| 2642 | hds->root.u.def.section = bfd_abs_section_ptr; |
| 2643 | hds->root.u.def.value = ldsym.l_value; |
| 2644 | } |
| 2645 | } |
| 2646 | } |
| 2647 | |
| 2648 | if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| 2649 | { |
| 2650 | free (coff_section_data (abfd, lsec)->contents); |
| 2651 | coff_section_data (abfd, lsec)->contents = NULL; |
| 2652 | } |
| 2653 | |
| 2654 | /* Record this file in the import files. */ |
| 2655 | |
| 2656 | n = ((struct xcoff_import_file *) |
| 2657 | bfd_alloc (abfd, sizeof (struct xcoff_import_file))); |
| 2658 | if (n == NULL) |
| 2659 | return false; |
| 2660 | n->next = NULL; |
| 2661 | |
| 2662 | /* For some reason, the path entry in the import file list for a |
| 2663 | shared object appears to always be empty. The file name is the |
| 2664 | base name. */ |
| 2665 | n->path = ""; |
| 2666 | if (abfd->my_archive == NULL) |
| 2667 | { |
| 2668 | bname = bfd_get_filename (abfd); |
| 2669 | mname = ""; |
| 2670 | } |
| 2671 | else |
| 2672 | { |
| 2673 | bname = bfd_get_filename (abfd->my_archive); |
| 2674 | mname = bfd_get_filename (abfd); |
| 2675 | } |
| 2676 | s = strrchr (bname, '/'); |
| 2677 | if (s != NULL) |
| 2678 | bname = s + 1; |
| 2679 | n->file = bname; |
| 2680 | n->member = mname; |
| 2681 | |
| 2682 | /* We start c at 1 because the first import file number is reserved |
| 2683 | for LIBPATH. */ |
| 2684 | for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| 2685 | *pp != NULL; |
| 2686 | pp = &(*pp)->next, ++c) |
| 2687 | ; |
| 2688 | *pp = n; |
| 2689 | |
| 2690 | xcoff_data (abfd)->import_file_id = c; |
| 2691 | |
| 2692 | return true; |
| 2693 | } |
| 2694 | \f |
| 2695 | /* Routines that are called after all the input files have been |
| 2696 | handled, but before the sections are laid out in memory. */ |
| 2697 | |
| 2698 | /* Mark a symbol as not being garbage, including the section in which |
| 2699 | it is defined. */ |
| 2700 | |
| 2701 | static INLINE boolean |
| 2702 | xcoff_mark_symbol (info, h) |
| 2703 | struct bfd_link_info *info; |
| 2704 | struct xcoff_link_hash_entry *h; |
| 2705 | { |
| 2706 | if ((h->flags & XCOFF_MARK) != 0) |
| 2707 | return true; |
| 2708 | |
| 2709 | h->flags |= XCOFF_MARK; |
| 2710 | if (h->root.type == bfd_link_hash_defined |
| 2711 | || h->root.type == bfd_link_hash_defweak) |
| 2712 | { |
| 2713 | asection *hsec; |
| 2714 | |
| 2715 | hsec = h->root.u.def.section; |
| 2716 | if (! bfd_is_abs_section (hsec) |
| 2717 | && (hsec->flags & SEC_MARK) == 0) |
| 2718 | { |
| 2719 | if (! xcoff_mark (info, hsec)) |
| 2720 | return false; |
| 2721 | } |
| 2722 | } |
| 2723 | |
| 2724 | if (h->toc_section != NULL |
| 2725 | && (h->toc_section->flags & SEC_MARK) == 0) |
| 2726 | { |
| 2727 | if (! xcoff_mark (info, h->toc_section)) |
| 2728 | return false; |
| 2729 | } |
| 2730 | |
| 2731 | return true; |
| 2732 | } |
| 2733 | |
| 2734 | /* The mark phase of garbage collection. For a given section, mark |
| 2735 | it, and all the sections which define symbols to which it refers. |
| 2736 | Because this function needs to look at the relocs, we also count |
| 2737 | the number of relocs which need to be copied into the .loader |
| 2738 | section. */ |
| 2739 | |
| 2740 | static boolean |
| 2741 | xcoff_mark (info, sec) |
| 2742 | struct bfd_link_info *info; |
| 2743 | asection *sec; |
| 2744 | { |
| 2745 | if (bfd_is_abs_section (sec) |
| 2746 | || (sec->flags & SEC_MARK) != 0) |
| 2747 | return true; |
| 2748 | |
| 2749 | sec->flags |= SEC_MARK; |
| 2750 | |
| 2751 | if (sec->owner->xvec == info->hash->creator |
| 2752 | && coff_section_data (sec->owner, sec) != NULL |
| 2753 | && xcoff_section_data (sec->owner, sec) != NULL) |
| 2754 | { |
| 2755 | register struct xcoff_link_hash_entry **hp, **hpend; |
| 2756 | struct internal_reloc *rel, *relend; |
| 2757 | |
| 2758 | /* Mark all the symbols in this section. */ |
| 2759 | |
| 2760 | hp = (obj_xcoff_sym_hashes (sec->owner) |
| 2761 | + xcoff_section_data (sec->owner, sec)->first_symndx); |
| 2762 | hpend = (obj_xcoff_sym_hashes (sec->owner) |
| 2763 | + xcoff_section_data (sec->owner, sec)->last_symndx); |
| 2764 | for (; hp < hpend; hp++) |
| 2765 | { |
| 2766 | register struct xcoff_link_hash_entry *h; |
| 2767 | |
| 2768 | h = *hp; |
| 2769 | if (h != NULL |
| 2770 | && (h->flags & XCOFF_MARK) == 0) |
| 2771 | { |
| 2772 | if (! xcoff_mark_symbol (info, h)) |
| 2773 | return false; |
| 2774 | } |
| 2775 | } |
| 2776 | |
| 2777 | /* Look through the section relocs. */ |
| 2778 | |
| 2779 | if ((sec->flags & SEC_RELOC) != 0 |
| 2780 | && sec->reloc_count > 0) |
| 2781 | { |
| 2782 | rel = xcoff_read_internal_relocs (sec->owner, sec, true, |
| 2783 | (bfd_byte *) NULL, false, |
| 2784 | (struct internal_reloc *) NULL); |
| 2785 | if (rel == NULL) |
| 2786 | return false; |
| 2787 | relend = rel + sec->reloc_count; |
| 2788 | for (; rel < relend; rel++) |
| 2789 | { |
| 2790 | asection *rsec; |
| 2791 | struct xcoff_link_hash_entry *h; |
| 2792 | |
| 2793 | if ((unsigned int) rel->r_symndx |
| 2794 | > obj_raw_syment_count (sec->owner)) |
| 2795 | continue; |
| 2796 | |
| 2797 | h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx]; |
| 2798 | if (h != NULL |
| 2799 | && (h->flags & XCOFF_MARK) == 0) |
| 2800 | { |
| 2801 | if (! xcoff_mark_symbol (info, h)) |
| 2802 | return false; |
| 2803 | } |
| 2804 | |
| 2805 | rsec = xcoff_data (sec->owner)->csects[rel->r_symndx]; |
| 2806 | if (rsec != NULL |
| 2807 | && (rsec->flags & SEC_MARK) == 0) |
| 2808 | { |
| 2809 | if (! xcoff_mark (info, rsec)) |
| 2810 | return false; |
| 2811 | } |
| 2812 | |
| 2813 | /* See if this reloc needs to be copied into the .loader |
| 2814 | section. */ |
| 2815 | switch (rel->r_type) |
| 2816 | { |
| 2817 | default: |
| 2818 | if (h == NULL |
| 2819 | || h->root.type == bfd_link_hash_defined |
| 2820 | || h->root.type == bfd_link_hash_defweak |
| 2821 | || h->root.type == bfd_link_hash_common |
| 2822 | || ((h->flags & XCOFF_CALLED) != 0 |
| 2823 | && (h->root.type == bfd_link_hash_undefined |
| 2824 | || h->root.type == bfd_link_hash_undefweak) |
| 2825 | && h->root.root.string[0] == '.' |
| 2826 | && h->descriptor != NULL |
| 2827 | && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 |
| 2828 | || ((h->descriptor->flags & XCOFF_IMPORT) != 0 |
| 2829 | && (h->descriptor->flags |
| 2830 | & XCOFF_DEF_REGULAR) == 0)))) |
| 2831 | break; |
| 2832 | /* Fall through. */ |
| 2833 | case R_POS: |
| 2834 | case R_NEG: |
| 2835 | case R_RL: |
| 2836 | case R_RLA: |
| 2837 | ++xcoff_hash_table (info)->ldrel_count; |
| 2838 | if (h != NULL) |
| 2839 | h->flags |= XCOFF_LDREL; |
| 2840 | break; |
| 2841 | case R_TOC: |
| 2842 | case R_GL: |
| 2843 | case R_TCL: |
| 2844 | case R_TRL: |
| 2845 | case R_TRLA: |
| 2846 | /* We should never need a .loader reloc for a TOC |
| 2847 | relative reloc. */ |
| 2848 | break; |
| 2849 | } |
| 2850 | } |
| 2851 | |
| 2852 | if (! info->keep_memory |
| 2853 | && coff_section_data (sec->owner, sec) != NULL |
| 2854 | && coff_section_data (sec->owner, sec)->relocs != NULL |
| 2855 | && ! coff_section_data (sec->owner, sec)->keep_relocs) |
| 2856 | { |
| 2857 | free (coff_section_data (sec->owner, sec)->relocs); |
| 2858 | coff_section_data (sec->owner, sec)->relocs = NULL; |
| 2859 | } |
| 2860 | } |
| 2861 | } |
| 2862 | |
| 2863 | return true; |
| 2864 | } |
| 2865 | |
| 2866 | /* The sweep phase of garbage collection. Remove all garbage |
| 2867 | sections. */ |
| 2868 | |
| 2869 | static void |
| 2870 | xcoff_sweep (info) |
| 2871 | struct bfd_link_info *info; |
| 2872 | { |
| 2873 | bfd *sub; |
| 2874 | |
| 2875 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 2876 | { |
| 2877 | asection *o; |
| 2878 | |
| 2879 | for (o = sub->sections; o != NULL; o = o->next) |
| 2880 | { |
| 2881 | if ((o->flags & SEC_MARK) == 0) |
| 2882 | { |
| 2883 | /* Keep all sections from non-XCOFF input files. Keep |
| 2884 | special sections. Keep .debug sections for the |
| 2885 | moment. */ |
| 2886 | if (sub->xvec != info->hash->creator |
| 2887 | || o == xcoff_hash_table (info)->debug_section |
| 2888 | || o == xcoff_hash_table (info)->loader_section |
| 2889 | || o == xcoff_hash_table (info)->linkage_section |
| 2890 | || o == xcoff_hash_table (info)->toc_section |
| 2891 | || o == xcoff_hash_table (info)->descriptor_section |
| 2892 | || strcmp (o->name, ".debug") == 0) |
| 2893 | o->flags |= SEC_MARK; |
| 2894 | else |
| 2895 | { |
| 2896 | o->_raw_size = 0; |
| 2897 | o->reloc_count = 0; |
| 2898 | o->lineno_count = 0; |
| 2899 | } |
| 2900 | } |
| 2901 | } |
| 2902 | } |
| 2903 | } |
| 2904 | |
| 2905 | /* Record the number of elements in a set. This is used to output the |
| 2906 | correct csect length. */ |
| 2907 | |
| 2908 | boolean |
| 2909 | bfd_xcoff_link_record_set (output_bfd, info, harg, size) |
| 2910 | bfd *output_bfd; |
| 2911 | struct bfd_link_info *info; |
| 2912 | struct bfd_link_hash_entry *harg; |
| 2913 | bfd_size_type size; |
| 2914 | { |
| 2915 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 2916 | struct xcoff_link_size_list *n; |
| 2917 | |
| 2918 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 2919 | return true; |
| 2920 | |
| 2921 | /* This will hardly ever be called. I don't want to burn four bytes |
| 2922 | per global symbol, so instead the size is kept on a linked list |
| 2923 | attached to the hash table. */ |
| 2924 | |
| 2925 | n = ((struct xcoff_link_size_list *) |
| 2926 | bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list))); |
| 2927 | if (n == NULL) |
| 2928 | return false; |
| 2929 | n->next = xcoff_hash_table (info)->size_list; |
| 2930 | n->h = h; |
| 2931 | n->size = size; |
| 2932 | xcoff_hash_table (info)->size_list = n; |
| 2933 | |
| 2934 | h->flags |= XCOFF_HAS_SIZE; |
| 2935 | |
| 2936 | return true; |
| 2937 | } |
| 2938 | |
| 2939 | /* Import a symbol. */ |
| 2940 | |
| 2941 | boolean |
| 2942 | bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile, |
| 2943 | impmember) |
| 2944 | bfd *output_bfd; |
| 2945 | struct bfd_link_info *info; |
| 2946 | struct bfd_link_hash_entry *harg; |
| 2947 | bfd_vma val; |
| 2948 | const char *imppath; |
| 2949 | const char *impfile; |
| 2950 | const char *impmember; |
| 2951 | { |
| 2952 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 2953 | |
| 2954 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 2955 | return true; |
| 2956 | |
| 2957 | /* A symbol name which starts with a period is the code for a |
| 2958 | function. If the symbol is undefined, then add an undefined |
| 2959 | symbol for the function descriptor, and import that instead. */ |
| 2960 | if (h->root.root.string[0] == '.' |
| 2961 | && h->root.type == bfd_link_hash_undefined |
| 2962 | && val == (bfd_vma) -1) |
| 2963 | { |
| 2964 | struct xcoff_link_hash_entry *hds; |
| 2965 | |
| 2966 | hds = h->descriptor; |
| 2967 | if (hds == NULL) |
| 2968 | { |
| 2969 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 2970 | h->root.root.string + 1, |
| 2971 | true, false, true); |
| 2972 | if (hds == NULL) |
| 2973 | return false; |
| 2974 | if (hds->root.type == bfd_link_hash_new) |
| 2975 | { |
| 2976 | hds->root.type = bfd_link_hash_undefined; |
| 2977 | hds->root.u.undef.abfd = h->root.u.undef.abfd; |
| 2978 | } |
| 2979 | hds->flags |= XCOFF_DESCRIPTOR; |
| 2980 | BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 |
| 2981 | && (h->flags & XCOFF_DESCRIPTOR) == 0); |
| 2982 | hds->descriptor = h; |
| 2983 | h->descriptor = hds; |
| 2984 | } |
| 2985 | |
| 2986 | /* Now, if the descriptor is undefined, import the descriptor |
| 2987 | rather than the symbol we were told to import. FIXME: Is |
| 2988 | this correct in all cases? */ |
| 2989 | if (hds->root.type == bfd_link_hash_undefined) |
| 2990 | h = hds; |
| 2991 | } |
| 2992 | |
| 2993 | h->flags |= XCOFF_IMPORT; |
| 2994 | |
| 2995 | if (val != (bfd_vma) -1) |
| 2996 | { |
| 2997 | if (h->root.type == bfd_link_hash_defined |
| 2998 | && (! bfd_is_abs_section (h->root.u.def.section) |
| 2999 | || h->root.u.def.value != val)) |
| 3000 | { |
| 3001 | if (! ((*info->callbacks->multiple_definition) |
| 3002 | (info, h->root.root.string, h->root.u.def.section->owner, |
| 3003 | h->root.u.def.section, h->root.u.def.value, |
| 3004 | output_bfd, bfd_abs_section_ptr, val))) |
| 3005 | return false; |
| 3006 | } |
| 3007 | |
| 3008 | h->root.type = bfd_link_hash_defined; |
| 3009 | h->root.u.def.section = bfd_abs_section_ptr; |
| 3010 | h->root.u.def.value = val; |
| 3011 | } |
| 3012 | |
| 3013 | /* We overload the ldindx field to hold the l_ifile value for this |
| 3014 | symbol. */ |
| 3015 | BFD_ASSERT (h->ldsym == NULL); |
| 3016 | BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0); |
| 3017 | if (imppath == NULL) |
| 3018 | h->ldindx = -1; |
| 3019 | else |
| 3020 | { |
| 3021 | unsigned int c; |
| 3022 | struct xcoff_import_file **pp; |
| 3023 | |
| 3024 | /* We start c at 1 because the first entry in the import list is |
| 3025 | reserved for the library search path. */ |
| 3026 | for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| 3027 | *pp != NULL; |
| 3028 | pp = &(*pp)->next, ++c) |
| 3029 | { |
| 3030 | if (strcmp ((*pp)->path, imppath) == 0 |
| 3031 | && strcmp ((*pp)->file, impfile) == 0 |
| 3032 | && strcmp ((*pp)->member, impmember) == 0) |
| 3033 | break; |
| 3034 | } |
| 3035 | |
| 3036 | if (*pp == NULL) |
| 3037 | { |
| 3038 | struct xcoff_import_file *n; |
| 3039 | |
| 3040 | n = ((struct xcoff_import_file *) |
| 3041 | bfd_alloc (output_bfd, sizeof (struct xcoff_import_file))); |
| 3042 | if (n == NULL) |
| 3043 | return false; |
| 3044 | n->next = NULL; |
| 3045 | n->path = imppath; |
| 3046 | n->file = impfile; |
| 3047 | n->member = impmember; |
| 3048 | *pp = n; |
| 3049 | } |
| 3050 | |
| 3051 | h->ldindx = c; |
| 3052 | } |
| 3053 | |
| 3054 | return true; |
| 3055 | } |
| 3056 | |
| 3057 | /* Export a symbol. */ |
| 3058 | |
| 3059 | boolean |
| 3060 | bfd_xcoff_export_symbol (output_bfd, info, harg, syscall) |
| 3061 | bfd *output_bfd; |
| 3062 | struct bfd_link_info *info; |
| 3063 | struct bfd_link_hash_entry *harg; |
| 3064 | boolean syscall; |
| 3065 | { |
| 3066 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| 3067 | |
| 3068 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 3069 | return true; |
| 3070 | |
| 3071 | h->flags |= XCOFF_EXPORT; |
| 3072 | |
| 3073 | /* FIXME: I'm not at all sure what syscall is supposed to mean, so |
| 3074 | I'm just going to ignore it until somebody explains it. */ |
| 3075 | |
| 3076 | /* See if this is a function descriptor. It may be one even though |
| 3077 | it is not so marked. */ |
| 3078 | if ((h->flags & XCOFF_DESCRIPTOR) == 0 |
| 3079 | && h->root.root.string[0] != '.') |
| 3080 | { |
| 3081 | char *fnname; |
| 3082 | struct xcoff_link_hash_entry *hfn; |
| 3083 | |
| 3084 | fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2); |
| 3085 | if (fnname == NULL) |
| 3086 | return false; |
| 3087 | fnname[0] = '.'; |
| 3088 | strcpy (fnname + 1, h->root.root.string); |
| 3089 | hfn = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| 3090 | fnname, false, false, true); |
| 3091 | free (fnname); |
| 3092 | if (hfn != NULL |
| 3093 | && hfn->smclas == XMC_PR |
| 3094 | && (hfn->root.type == bfd_link_hash_defined |
| 3095 | || hfn->root.type == bfd_link_hash_defweak)) |
| 3096 | { |
| 3097 | h->flags |= XCOFF_DESCRIPTOR; |
| 3098 | h->descriptor = hfn; |
| 3099 | hfn->descriptor = h; |
| 3100 | } |
| 3101 | } |
| 3102 | |
| 3103 | /* Make sure we don't garbage collect this symbol. */ |
| 3104 | if (! xcoff_mark_symbol (info, h)) |
| 3105 | return false; |
| 3106 | |
| 3107 | /* If this is a function descriptor, make sure we don't garbage |
| 3108 | collect the associated function code. We normally don't have to |
| 3109 | worry about this, because the descriptor will be attached to a |
| 3110 | section with relocs, but if we are creating the descriptor |
| 3111 | ourselves those relocs will not be visible to the mark code. */ |
| 3112 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| 3113 | { |
| 3114 | if (! xcoff_mark_symbol (info, h->descriptor)) |
| 3115 | return false; |
| 3116 | } |
| 3117 | |
| 3118 | return true; |
| 3119 | } |
| 3120 | |
| 3121 | /* Count a reloc against a symbol. This is called for relocs |
| 3122 | generated by the linker script, typically for global constructors |
| 3123 | and destructors. */ |
| 3124 | |
| 3125 | boolean |
| 3126 | bfd_xcoff_link_count_reloc (output_bfd, info, name) |
| 3127 | bfd *output_bfd; |
| 3128 | struct bfd_link_info *info; |
| 3129 | const char *name; |
| 3130 | { |
| 3131 | struct xcoff_link_hash_entry *h; |
| 3132 | |
| 3133 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 3134 | return true; |
| 3135 | |
| 3136 | h = ((struct xcoff_link_hash_entry *) |
| 3137 | bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false, |
| 3138 | false)); |
| 3139 | if (h == NULL) |
| 3140 | { |
| 3141 | (*_bfd_error_handler) (_("%s: no such symbol"), name); |
| 3142 | bfd_set_error (bfd_error_no_symbols); |
| 3143 | return false; |
| 3144 | } |
| 3145 | |
| 3146 | h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL; |
| 3147 | ++xcoff_hash_table (info)->ldrel_count; |
| 3148 | |
| 3149 | /* Mark the symbol to avoid garbage collection. */ |
| 3150 | if (! xcoff_mark_symbol (info, h)) |
| 3151 | return false; |
| 3152 | |
| 3153 | return true; |
| 3154 | } |
| 3155 | |
| 3156 | /* This function is called for each symbol to which the linker script |
| 3157 | assigns a value. */ |
| 3158 | |
| 3159 | boolean |
| 3160 | bfd_xcoff_record_link_assignment (output_bfd, info, name) |
| 3161 | bfd *output_bfd; |
| 3162 | struct bfd_link_info *info; |
| 3163 | const char *name; |
| 3164 | { |
| 3165 | struct xcoff_link_hash_entry *h; |
| 3166 | |
| 3167 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 3168 | return true; |
| 3169 | |
| 3170 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true, |
| 3171 | false); |
| 3172 | if (h == NULL) |
| 3173 | return false; |
| 3174 | |
| 3175 | h->flags |= XCOFF_DEF_REGULAR; |
| 3176 | |
| 3177 | return true; |
| 3178 | } |
| 3179 | |
| 3180 | /* This structure is used to pass information through |
| 3181 | xcoff_link_hash_traverse. */ |
| 3182 | |
| 3183 | struct xcoff_loader_info |
| 3184 | { |
| 3185 | /* Set if a problem occurred. */ |
| 3186 | boolean failed; |
| 3187 | /* Output BFD. */ |
| 3188 | bfd *output_bfd; |
| 3189 | /* Link information structure. */ |
| 3190 | struct bfd_link_info *info; |
| 3191 | /* Whether all defined symbols should be exported. */ |
| 3192 | boolean export_defineds; |
| 3193 | /* Number of ldsym structures. */ |
| 3194 | size_t ldsym_count; |
| 3195 | /* Size of string table. */ |
| 3196 | size_t string_size; |
| 3197 | /* String table. */ |
| 3198 | bfd_byte *strings; |
| 3199 | /* Allocated size of string table. */ |
| 3200 | size_t string_alc; |
| 3201 | }; |
| 3202 | |
| 3203 | /* Build the .loader section. This is called by the XCOFF linker |
| 3204 | emulation before_allocation routine. We must set the size of the |
| 3205 | .loader section before the linker lays out the output file. |
| 3206 | LIBPATH is the library path to search for shared objects; this is |
| 3207 | normally built from the -L arguments passed to the linker. ENTRY |
| 3208 | is the name of the entry point symbol (the -e linker option). |
| 3209 | FILE_ALIGN is the alignment to use for sections within the file |
| 3210 | (the -H linker option). MAXSTACK is the maximum stack size (the |
| 3211 | -bmaxstack linker option). MAXDATA is the maximum data size (the |
| 3212 | -bmaxdata linker option). GC is whether to do garbage collection |
| 3213 | (the -bgc linker option). MODTYPE is the module type (the |
| 3214 | -bmodtype linker option). TEXTRO is whether the text section must |
| 3215 | be read only (the -btextro linker option). EXPORT_DEFINEDS is |
| 3216 | whether all defined symbols should be exported (the -unix linker |
| 3217 | option). SPECIAL_SECTIONS is set by this routine to csects with |
| 3218 | magic names like _end. */ |
| 3219 | |
| 3220 | boolean |
| 3221 | bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry, |
| 3222 | file_align, maxstack, maxdata, gc, |
| 3223 | modtype, textro, export_defineds, |
| 3224 | special_sections) |
| 3225 | bfd *output_bfd; |
| 3226 | struct bfd_link_info *info; |
| 3227 | const char *libpath; |
| 3228 | const char *entry; |
| 3229 | unsigned long file_align; |
| 3230 | unsigned long maxstack; |
| 3231 | unsigned long maxdata; |
| 3232 | boolean gc; |
| 3233 | int modtype; |
| 3234 | boolean textro; |
| 3235 | boolean export_defineds; |
| 3236 | asection **special_sections; |
| 3237 | { |
| 3238 | struct xcoff_link_hash_entry *hentry; |
| 3239 | asection *lsec; |
| 3240 | struct xcoff_loader_info ldinfo; |
| 3241 | int i; |
| 3242 | size_t impsize, impcount; |
| 3243 | struct xcoff_import_file *fl; |
| 3244 | struct internal_ldhdr *ldhdr; |
| 3245 | bfd_size_type stoff; |
| 3246 | register char *out; |
| 3247 | asection *sec; |
| 3248 | bfd *sub; |
| 3249 | struct bfd_strtab_hash *debug_strtab; |
| 3250 | bfd_byte *debug_contents = NULL; |
| 3251 | |
| 3252 | if (! XCOFF_XVECP (output_bfd->xvec)) |
| 3253 | { |
| 3254 | for (i = 0; i < 6; i++) |
| 3255 | special_sections[i] = NULL; |
| 3256 | return true; |
| 3257 | } |
| 3258 | |
| 3259 | ldinfo.failed = false; |
| 3260 | ldinfo.output_bfd = output_bfd; |
| 3261 | ldinfo.info = info; |
| 3262 | ldinfo.export_defineds = export_defineds; |
| 3263 | ldinfo.ldsym_count = 0; |
| 3264 | ldinfo.string_size = 0; |
| 3265 | ldinfo.strings = NULL; |
| 3266 | ldinfo.string_alc = 0; |
| 3267 | |
| 3268 | xcoff_data (output_bfd)->maxstack = maxstack; |
| 3269 | xcoff_data (output_bfd)->maxdata = maxdata; |
| 3270 | xcoff_data (output_bfd)->modtype = modtype; |
| 3271 | |
| 3272 | xcoff_hash_table (info)->file_align = file_align; |
| 3273 | xcoff_hash_table (info)->textro = textro; |
| 3274 | |
| 3275 | hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry, |
| 3276 | false, false, true); |
| 3277 | if (hentry != NULL) |
| 3278 | hentry->flags |= XCOFF_ENTRY; |
| 3279 | |
| 3280 | /* Garbage collect unused sections. */ |
| 3281 | if (info->relocateable |
| 3282 | || ! gc |
| 3283 | || hentry == NULL |
| 3284 | || (hentry->root.type != bfd_link_hash_defined |
| 3285 | && hentry->root.type != bfd_link_hash_defweak)) |
| 3286 | { |
| 3287 | gc = false; |
| 3288 | xcoff_hash_table (info)->gc = false; |
| 3289 | |
| 3290 | /* We still need to call xcoff_mark, in order to set ldrel_count |
| 3291 | correctly. */ |
| 3292 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 3293 | { |
| 3294 | asection *o; |
| 3295 | |
| 3296 | for (o = sub->sections; o != NULL; o = o->next) |
| 3297 | { |
| 3298 | if ((o->flags & SEC_MARK) == 0) |
| 3299 | { |
| 3300 | if (! xcoff_mark (info, o)) |
| 3301 | goto error_return; |
| 3302 | } |
| 3303 | } |
| 3304 | } |
| 3305 | } |
| 3306 | else |
| 3307 | { |
| 3308 | if (! xcoff_mark (info, hentry->root.u.def.section)) |
| 3309 | goto error_return; |
| 3310 | xcoff_sweep (info); |
| 3311 | xcoff_hash_table (info)->gc = true; |
| 3312 | } |
| 3313 | |
| 3314 | /* Return special sections to the caller. */ |
| 3315 | for (i = 0; i < 6; i++) |
| 3316 | { |
| 3317 | asection *sec; |
| 3318 | |
| 3319 | sec = xcoff_hash_table (info)->special_sections[i]; |
| 3320 | if (sec != NULL |
| 3321 | && gc |
| 3322 | && (sec->flags & SEC_MARK) == 0) |
| 3323 | sec = NULL; |
| 3324 | special_sections[i] = sec; |
| 3325 | } |
| 3326 | |
| 3327 | if (info->input_bfds == NULL) |
| 3328 | { |
| 3329 | /* I'm not sure what to do in this bizarre case. */ |
| 3330 | return true; |
| 3331 | } |
| 3332 | |
| 3333 | xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms, |
| 3334 | (PTR) &ldinfo); |
| 3335 | if (ldinfo.failed) |
| 3336 | goto error_return; |
| 3337 | |
| 3338 | /* Work out the size of the import file names. Each import file ID |
| 3339 | consists of three null terminated strings: the path, the file |
| 3340 | name, and the archive member name. The first entry in the list |
| 3341 | of names is the path to use to find objects, which the linker has |
| 3342 | passed in as the libpath argument. For some reason, the path |
| 3343 | entry in the other import file names appears to always be empty. */ |
| 3344 | impsize = strlen (libpath) + 3; |
| 3345 | impcount = 1; |
| 3346 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) |
| 3347 | { |
| 3348 | ++impcount; |
| 3349 | impsize += (strlen (fl->path) |
| 3350 | + strlen (fl->file) |
| 3351 | + strlen (fl->member) |
| 3352 | + 3); |
| 3353 | } |
| 3354 | |
| 3355 | /* Set up the .loader section header. */ |
| 3356 | ldhdr = &xcoff_hash_table (info)->ldhdr; |
| 3357 | ldhdr->l_version = 1; |
| 3358 | ldhdr->l_nsyms = ldinfo.ldsym_count; |
| 3359 | ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count; |
| 3360 | ldhdr->l_istlen = impsize; |
| 3361 | ldhdr->l_nimpid = impcount; |
| 3362 | ldhdr->l_impoff = (LDHDRSZ |
| 3363 | + ldhdr->l_nsyms * LDSYMSZ |
| 3364 | + ldhdr->l_nreloc * LDRELSZ); |
| 3365 | ldhdr->l_stlen = ldinfo.string_size; |
| 3366 | stoff = ldhdr->l_impoff + impsize; |
| 3367 | if (ldinfo.string_size == 0) |
| 3368 | ldhdr->l_stoff = 0; |
| 3369 | else |
| 3370 | ldhdr->l_stoff = stoff; |
| 3371 | |
| 3372 | /* We now know the final size of the .loader section. Allocate |
| 3373 | space for it. */ |
| 3374 | lsec = xcoff_hash_table (info)->loader_section; |
| 3375 | lsec->_raw_size = stoff + ldhdr->l_stlen; |
| 3376 | lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size); |
| 3377 | if (lsec->contents == NULL) |
| 3378 | goto error_return; |
| 3379 | |
| 3380 | /* Set up the header. */ |
| 3381 | xcoff_swap_ldhdr_out (output_bfd, ldhdr, |
| 3382 | (struct external_ldhdr *) lsec->contents); |
| 3383 | |
| 3384 | /* Set up the import file names. */ |
| 3385 | out = (char *) lsec->contents + ldhdr->l_impoff; |
| 3386 | strcpy (out, libpath); |
| 3387 | out += strlen (libpath) + 1; |
| 3388 | *out++ = '\0'; |
| 3389 | *out++ = '\0'; |
| 3390 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) |
| 3391 | { |
| 3392 | register const char *s; |
| 3393 | |
| 3394 | s = fl->path; |
| 3395 | while ((*out++ = *s++) != '\0') |
| 3396 | ; |
| 3397 | s = fl->file; |
| 3398 | while ((*out++ = *s++) != '\0') |
| 3399 | ; |
| 3400 | s = fl->member; |
| 3401 | while ((*out++ = *s++) != '\0') |
| 3402 | ; |
| 3403 | } |
| 3404 | |
| 3405 | BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff); |
| 3406 | |
| 3407 | /* Set up the symbol string table. */ |
| 3408 | if (ldinfo.string_size > 0) |
| 3409 | { |
| 3410 | memcpy (out, ldinfo.strings, ldinfo.string_size); |
| 3411 | free (ldinfo.strings); |
| 3412 | ldinfo.strings = NULL; |
| 3413 | } |
| 3414 | |
| 3415 | /* We can't set up the symbol table or the relocs yet, because we |
| 3416 | don't yet know the final position of the various sections. The |
| 3417 | .loader symbols are written out when the corresponding normal |
| 3418 | symbols are written out in xcoff_link_input_bfd or |
| 3419 | xcoff_write_global_symbol. The .loader relocs are written out |
| 3420 | when the corresponding normal relocs are handled in |
| 3421 | xcoff_link_input_bfd. */ |
| 3422 | |
| 3423 | /* Allocate space for the magic sections. */ |
| 3424 | sec = xcoff_hash_table (info)->linkage_section; |
| 3425 | if (sec->_raw_size > 0) |
| 3426 | { |
| 3427 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| 3428 | if (sec->contents == NULL) |
| 3429 | goto error_return; |
| 3430 | } |
| 3431 | sec = xcoff_hash_table (info)->toc_section; |
| 3432 | if (sec->_raw_size > 0) |
| 3433 | { |
| 3434 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| 3435 | if (sec->contents == NULL) |
| 3436 | goto error_return; |
| 3437 | } |
| 3438 | sec = xcoff_hash_table (info)->descriptor_section; |
| 3439 | if (sec->_raw_size > 0) |
| 3440 | { |
| 3441 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| 3442 | if (sec->contents == NULL) |
| 3443 | goto error_return; |
| 3444 | } |
| 3445 | |
| 3446 | /* Now that we've done garbage collection, figure out the contents |
| 3447 | of the .debug section. */ |
| 3448 | debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| 3449 | |
| 3450 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 3451 | { |
| 3452 | asection *subdeb; |
| 3453 | bfd_size_type symcount; |
| 3454 | unsigned long *debug_index; |
| 3455 | asection **csectpp; |
| 3456 | bfd_byte *esym, *esymend; |
| 3457 | bfd_size_type symesz; |
| 3458 | |
| 3459 | if (sub->xvec != info->hash->creator) |
| 3460 | continue; |
| 3461 | subdeb = bfd_get_section_by_name (sub, ".debug"); |
| 3462 | if (subdeb == NULL || subdeb->_raw_size == 0) |
| 3463 | continue; |
| 3464 | |
| 3465 | if (info->strip == strip_all |
| 3466 | || info->strip == strip_debugger |
| 3467 | || info->discard == discard_all) |
| 3468 | { |
| 3469 | subdeb->_raw_size = 0; |
| 3470 | continue; |
| 3471 | } |
| 3472 | |
| 3473 | if (! _bfd_coff_get_external_symbols (sub)) |
| 3474 | goto error_return; |
| 3475 | |
| 3476 | symcount = obj_raw_syment_count (sub); |
| 3477 | debug_index = ((unsigned long *) |
| 3478 | bfd_zalloc (sub, symcount * sizeof (unsigned long))); |
| 3479 | if (debug_index == NULL) |
| 3480 | goto error_return; |
| 3481 | xcoff_data (sub)->debug_indices = debug_index; |
| 3482 | |
| 3483 | /* Grab the contents of the .debug section. We use malloc and |
| 3484 | copy the names into the debug stringtab, rather than |
| 3485 | bfd_alloc, because I expect that, when linking many files |
| 3486 | together, many of the strings will be the same. Storing the |
| 3487 | strings in the hash table should save space in this case. */ |
| 3488 | debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size); |
| 3489 | if (debug_contents == NULL) |
| 3490 | goto error_return; |
| 3491 | if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents, |
| 3492 | (file_ptr) 0, subdeb->_raw_size)) |
| 3493 | goto error_return; |
| 3494 | |
| 3495 | csectpp = xcoff_data (sub)->csects; |
| 3496 | |
| 3497 | symesz = bfd_coff_symesz (sub); |
| 3498 | esym = (bfd_byte *) obj_coff_external_syms (sub); |
| 3499 | esymend = esym + symcount * symesz; |
| 3500 | while (esym < esymend) |
| 3501 | { |
| 3502 | struct internal_syment sym; |
| 3503 | |
| 3504 | bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym); |
| 3505 | |
| 3506 | *debug_index = (unsigned long) -1; |
| 3507 | |
| 3508 | if (sym._n._n_n._n_zeroes == 0 |
| 3509 | && *csectpp != NULL |
| 3510 | && (! gc |
| 3511 | || ((*csectpp)->flags & SEC_MARK) != 0 |
| 3512 | || *csectpp == bfd_abs_section_ptr) |
| 3513 | && bfd_coff_symname_in_debug (sub, &sym)) |
| 3514 | { |
| 3515 | char *name; |
| 3516 | bfd_size_type indx; |
| 3517 | |
| 3518 | name = (char *) debug_contents + sym._n._n_n._n_offset; |
| 3519 | indx = _bfd_stringtab_add (debug_strtab, name, true, true); |
| 3520 | if (indx == (bfd_size_type) -1) |
| 3521 | goto error_return; |
| 3522 | *debug_index = indx; |
| 3523 | } |
| 3524 | |
| 3525 | esym += (sym.n_numaux + 1) * symesz; |
| 3526 | csectpp += sym.n_numaux + 1; |
| 3527 | debug_index += sym.n_numaux + 1; |
| 3528 | } |
| 3529 | |
| 3530 | free (debug_contents); |
| 3531 | debug_contents = NULL; |
| 3532 | |
| 3533 | /* Clear the size of subdeb, so that it is not included directly |
| 3534 | in the output file. */ |
| 3535 | subdeb->_raw_size = 0; |
| 3536 | |
| 3537 | if (! info->keep_memory) |
| 3538 | { |
| 3539 | if (! _bfd_coff_free_symbols (sub)) |
| 3540 | goto error_return; |
| 3541 | } |
| 3542 | } |
| 3543 | |
| 3544 | if (info->strip != strip_all) |
| 3545 | xcoff_hash_table (info)->debug_section->_raw_size = |
| 3546 | _bfd_stringtab_size (debug_strtab); |
| 3547 | |
| 3548 | return true; |
| 3549 | |
| 3550 | error_return: |
| 3551 | if (ldinfo.strings != NULL) |
| 3552 | free (ldinfo.strings); |
| 3553 | if (debug_contents != NULL) |
| 3554 | free (debug_contents); |
| 3555 | return false; |
| 3556 | } |
| 3557 | |
| 3558 | /* Add a symbol to the .loader symbols, if necessary. */ |
| 3559 | |
| 3560 | static boolean |
| 3561 | xcoff_build_ldsyms (h, p) |
| 3562 | struct xcoff_link_hash_entry *h; |
| 3563 | PTR p; |
| 3564 | { |
| 3565 | struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p; |
| 3566 | size_t len; |
| 3567 | |
| 3568 | /* If this is a final link, and the symbol was defined as a common |
| 3569 | symbol in a regular object file, and there was no definition in |
| 3570 | any dynamic object, then the linker will have allocated space for |
| 3571 | the symbol in a common section but the XCOFF_DEF_REGULAR flag |
| 3572 | will not have been set. */ |
| 3573 | if (h->root.type == bfd_link_hash_defined |
| 3574 | && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| 3575 | && (h->flags & XCOFF_REF_REGULAR) != 0 |
| 3576 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| 3577 | && (bfd_is_abs_section (h->root.u.def.section) |
| 3578 | || (h->root.u.def.section->owner->flags & DYNAMIC) == 0)) |
| 3579 | h->flags |= XCOFF_DEF_REGULAR; |
| 3580 | |
| 3581 | /* If all defined symbols should be exported, mark them now. We |
| 3582 | don't want to export the actual functions, just the function |
| 3583 | descriptors. */ |
| 3584 | if (ldinfo->export_defineds |
| 3585 | && (h->flags & XCOFF_DEF_REGULAR) != 0 |
| 3586 | && h->root.root.string[0] != '.') |
| 3587 | { |
| 3588 | boolean export; |
| 3589 | |
| 3590 | /* We don't export a symbol which is being defined by an object |
| 3591 | included from an archive which contains a shared object. The |
| 3592 | rationale is that if an archive contains both an unshared and |
| 3593 | a shared object, then there must be some reason that the |
| 3594 | unshared object is unshared, and we don't want to start |
| 3595 | providing a shared version of it. In particular, this solves |
| 3596 | a bug involving the _savefNN set of functions. gcc will call |
| 3597 | those functions without providing a slot to restore the TOC, |
| 3598 | so it is essential that these functions be linked in directly |
| 3599 | and not from a shared object, which means that a shared |
| 3600 | object which also happens to link them in must not export |
| 3601 | them. This is confusing, but I haven't been able to think of |
| 3602 | a different approach. Note that the symbols can, of course, |
| 3603 | be exported explicitly. */ |
| 3604 | export = true; |
| 3605 | if ((h->root.type == bfd_link_hash_defined |
| 3606 | || h->root.type == bfd_link_hash_defweak) |
| 3607 | && h->root.u.def.section->owner != NULL |
| 3608 | && h->root.u.def.section->owner->my_archive != NULL) |
| 3609 | { |
| 3610 | bfd *arbfd, *member; |
| 3611 | |
| 3612 | arbfd = h->root.u.def.section->owner->my_archive; |
| 3613 | member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL); |
| 3614 | while (member != NULL) |
| 3615 | { |
| 3616 | if ((member->flags & DYNAMIC) != 0) |
| 3617 | { |
| 3618 | export = false; |
| 3619 | break; |
| 3620 | } |
| 3621 | member = bfd_openr_next_archived_file (arbfd, member); |
| 3622 | } |
| 3623 | } |
| 3624 | |
| 3625 | if (export) |
| 3626 | h->flags |= XCOFF_EXPORT; |
| 3627 | } |
| 3628 | |
| 3629 | /* We don't want to garbage collect symbols which are not defined in |
| 3630 | XCOFF files. This is a convenient place to mark them. */ |
| 3631 | if (xcoff_hash_table (ldinfo->info)->gc |
| 3632 | && (h->flags & XCOFF_MARK) == 0 |
| 3633 | && (h->root.type == bfd_link_hash_defined |
| 3634 | || h->root.type == bfd_link_hash_defweak) |
| 3635 | && (h->root.u.def.section->owner == NULL |
| 3636 | || (h->root.u.def.section->owner->xvec |
| 3637 | != ldinfo->info->hash->creator))) |
| 3638 | h->flags |= XCOFF_MARK; |
| 3639 | |
| 3640 | /* If this symbol is called and defined in a dynamic object, or it |
| 3641 | is imported, then we need to set up global linkage code for it. |
| 3642 | (Unless we did garbage collection and we didn't need this |
| 3643 | symbol.) */ |
| 3644 | if ((h->flags & XCOFF_CALLED) != 0 |
| 3645 | && (h->root.type == bfd_link_hash_undefined |
| 3646 | || h->root.type == bfd_link_hash_undefweak) |
| 3647 | && h->root.root.string[0] == '.' |
| 3648 | && h->descriptor != NULL |
| 3649 | && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 |
| 3650 | || ((h->descriptor->flags & XCOFF_IMPORT) != 0 |
| 3651 | && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0)) |
| 3652 | && (! xcoff_hash_table (ldinfo->info)->gc |
| 3653 | || (h->flags & XCOFF_MARK) != 0)) |
| 3654 | { |
| 3655 | asection *sec; |
| 3656 | struct xcoff_link_hash_entry *hds; |
| 3657 | |
| 3658 | sec = xcoff_hash_table (ldinfo->info)->linkage_section; |
| 3659 | h->root.type = bfd_link_hash_defined; |
| 3660 | h->root.u.def.section = sec; |
| 3661 | h->root.u.def.value = sec->_raw_size; |
| 3662 | h->smclas = XMC_GL; |
| 3663 | h->flags |= XCOFF_DEF_REGULAR; |
| 3664 | sec->_raw_size += XCOFF_GLINK_SIZE; |
| 3665 | |
| 3666 | /* The global linkage code requires a TOC entry for the |
| 3667 | descriptor. */ |
| 3668 | hds = h->descriptor; |
| 3669 | BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined |
| 3670 | || hds->root.type == bfd_link_hash_undefweak) |
| 3671 | && (hds->flags & XCOFF_DEF_REGULAR) == 0); |
| 3672 | hds->flags |= XCOFF_MARK; |
| 3673 | if (hds->toc_section == NULL) |
| 3674 | { |
| 3675 | hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section; |
| 3676 | hds->u.toc_offset = hds->toc_section->_raw_size; |
| 3677 | hds->toc_section->_raw_size += 4; |
| 3678 | ++xcoff_hash_table (ldinfo->info)->ldrel_count; |
| 3679 | ++hds->toc_section->reloc_count; |
| 3680 | hds->indx = -2; |
| 3681 | hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL; |
| 3682 | |
| 3683 | /* We need to call xcoff_build_ldsyms recursively here, |
| 3684 | because we may already have passed hds on the traversal. */ |
| 3685 | xcoff_build_ldsyms (hds, p); |
| 3686 | } |
| 3687 | } |
| 3688 | |
| 3689 | /* If this symbol is exported, but not defined, we need to try to |
| 3690 | define it. */ |
| 3691 | if ((h->flags & XCOFF_EXPORT) != 0 |
| 3692 | && (h->flags & XCOFF_IMPORT) == 0 |
| 3693 | && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| 3694 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| 3695 | && (h->root.type == bfd_link_hash_undefined |
| 3696 | || h->root.type == bfd_link_hash_undefweak)) |
| 3697 | { |
| 3698 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| 3699 | && (h->descriptor->root.type == bfd_link_hash_defined |
| 3700 | || h->descriptor->root.type == bfd_link_hash_defweak)) |
| 3701 | { |
| 3702 | asection *sec; |
| 3703 | |
| 3704 | /* This is an undefined function descriptor associated with |
| 3705 | a defined entry point. We can build up a function |
| 3706 | descriptor ourselves. Believe it or not, the AIX linker |
| 3707 | actually does this, and there are cases where we need to |
| 3708 | do it as well. */ |
| 3709 | sec = xcoff_hash_table (ldinfo->info)->descriptor_section; |
| 3710 | h->root.type = bfd_link_hash_defined; |
| 3711 | h->root.u.def.section = sec; |
| 3712 | h->root.u.def.value = sec->_raw_size; |
| 3713 | h->smclas = XMC_DS; |
| 3714 | h->flags |= XCOFF_DEF_REGULAR; |
| 3715 | sec->_raw_size += 12; |
| 3716 | |
| 3717 | /* A function descriptor uses two relocs: one for the |
| 3718 | associated code, and one for the TOC address. */ |
| 3719 | xcoff_hash_table (ldinfo->info)->ldrel_count += 2; |
| 3720 | sec->reloc_count += 2; |
| 3721 | |
| 3722 | /* We handle writing out the contents of the descriptor in |
| 3723 | xcoff_write_global_symbol. */ |
| 3724 | } |
| 3725 | else |
| 3726 | { |
| 3727 | (*_bfd_error_handler) |
| 3728 | (_("warning: attempt to export undefined symbol `%s'"), |
| 3729 | h->root.root.string); |
| 3730 | h->ldsym = NULL; |
| 3731 | return true; |
| 3732 | } |
| 3733 | } |
| 3734 | |
| 3735 | /* If this is still a common symbol, and it wasn't garbage |
| 3736 | collected, we need to actually allocate space for it in the .bss |
| 3737 | section. */ |
| 3738 | if (h->root.type == bfd_link_hash_common |
| 3739 | && (! xcoff_hash_table (ldinfo->info)->gc |
| 3740 | || (h->flags & XCOFF_MARK) != 0) |
| 3741 | && h->root.u.c.p->section->_raw_size == 0) |
| 3742 | { |
| 3743 | BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section)); |
| 3744 | h->root.u.c.p->section->_raw_size = h->root.u.c.size; |
| 3745 | } |
| 3746 | |
| 3747 | /* We need to add a symbol to the .loader section if it is mentioned |
| 3748 | in a reloc which we are copying to the .loader section and it was |
| 3749 | not defined or common, or if it is the entry point, or if it is |
| 3750 | being exported. */ |
| 3751 | |
| 3752 | if (((h->flags & XCOFF_LDREL) == 0 |
| 3753 | || h->root.type == bfd_link_hash_defined |
| 3754 | || h->root.type == bfd_link_hash_defweak |
| 3755 | || h->root.type == bfd_link_hash_common) |
| 3756 | && (h->flags & XCOFF_ENTRY) == 0 |
| 3757 | && (h->flags & XCOFF_EXPORT) == 0) |
| 3758 | { |
| 3759 | h->ldsym = NULL; |
| 3760 | return true; |
| 3761 | } |
| 3762 | |
| 3763 | /* We don't need to add this symbol if we did garbage collection and |
| 3764 | we did not mark this symbol. */ |
| 3765 | if (xcoff_hash_table (ldinfo->info)->gc |
| 3766 | && (h->flags & XCOFF_MARK) == 0) |
| 3767 | { |
| 3768 | h->ldsym = NULL; |
| 3769 | return true; |
| 3770 | } |
| 3771 | |
| 3772 | /* We may have already processed this symbol due to the recursive |
| 3773 | call above. */ |
| 3774 | if ((h->flags & XCOFF_BUILT_LDSYM) != 0) |
| 3775 | return true; |
| 3776 | |
| 3777 | /* We need to add this symbol to the .loader symbols. */ |
| 3778 | |
| 3779 | BFD_ASSERT (h->ldsym == NULL); |
| 3780 | h->ldsym = ((struct internal_ldsym *) |
| 3781 | bfd_zalloc (ldinfo->output_bfd, |
| 3782 | sizeof (struct internal_ldsym))); |
| 3783 | if (h->ldsym == NULL) |
| 3784 | { |
| 3785 | ldinfo->failed = true; |
| 3786 | return false; |
| 3787 | } |
| 3788 | |
| 3789 | if ((h->flags & XCOFF_IMPORT) != 0) |
| 3790 | h->ldsym->l_ifile = h->ldindx; |
| 3791 | |
| 3792 | /* The first 3 symbol table indices are reserved to indicate the |
| 3793 | sections. */ |
| 3794 | h->ldindx = ldinfo->ldsym_count + 3; |
| 3795 | |
| 3796 | ++ldinfo->ldsym_count; |
| 3797 | |
| 3798 | len = strlen (h->root.root.string); |
| 3799 | if (len <= SYMNMLEN) |
| 3800 | strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN); |
| 3801 | else |
| 3802 | { |
| 3803 | if (ldinfo->string_size + len + 3 > ldinfo->string_alc) |
| 3804 | { |
| 3805 | size_t newalc; |
| 3806 | bfd_byte *newstrings; |
| 3807 | |
| 3808 | newalc = ldinfo->string_alc * 2; |
| 3809 | if (newalc == 0) |
| 3810 | newalc = 32; |
| 3811 | while (ldinfo->string_size + len + 3 > newalc) |
| 3812 | newalc *= 2; |
| 3813 | |
| 3814 | newstrings = ((bfd_byte *) |
| 3815 | bfd_realloc ((PTR) ldinfo->strings, newalc)); |
| 3816 | if (newstrings == NULL) |
| 3817 | { |
| 3818 | ldinfo->failed = true; |
| 3819 | return false; |
| 3820 | } |
| 3821 | ldinfo->string_alc = newalc; |
| 3822 | ldinfo->strings = newstrings; |
| 3823 | } |
| 3824 | |
| 3825 | bfd_put_16 (ldinfo->output_bfd, len + 1, |
| 3826 | ldinfo->strings + ldinfo->string_size); |
| 3827 | strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string); |
| 3828 | h->ldsym->_l._l_l._l_zeroes = 0; |
| 3829 | h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2; |
| 3830 | ldinfo->string_size += len + 3; |
| 3831 | } |
| 3832 | |
| 3833 | h->flags |= XCOFF_BUILT_LDSYM; |
| 3834 | |
| 3835 | return true; |
| 3836 | } |
| 3837 | \f |
| 3838 | /* Do the final link step. */ |
| 3839 | |
| 3840 | boolean |
| 3841 | _bfd_xcoff_bfd_final_link (abfd, info) |
| 3842 | bfd *abfd; |
| 3843 | struct bfd_link_info *info; |
| 3844 | { |
| 3845 | bfd_size_type symesz; |
| 3846 | struct xcoff_final_link_info finfo; |
| 3847 | asection *o; |
| 3848 | struct bfd_link_order *p; |
| 3849 | size_t max_contents_size; |
| 3850 | size_t max_sym_count; |
| 3851 | size_t max_lineno_count; |
| 3852 | size_t max_reloc_count; |
| 3853 | size_t max_output_reloc_count; |
| 3854 | file_ptr rel_filepos; |
| 3855 | unsigned int relsz; |
| 3856 | file_ptr line_filepos; |
| 3857 | unsigned int linesz; |
| 3858 | bfd *sub; |
| 3859 | bfd_byte *external_relocs = NULL; |
| 3860 | char strbuf[STRING_SIZE_SIZE]; |
| 3861 | |
| 3862 | if (info->shared) |
| 3863 | abfd->flags |= DYNAMIC; |
| 3864 | |
| 3865 | symesz = bfd_coff_symesz (abfd); |
| 3866 | |
| 3867 | finfo.info = info; |
| 3868 | finfo.output_bfd = abfd; |
| 3869 | finfo.strtab = NULL; |
| 3870 | finfo.section_info = NULL; |
| 3871 | finfo.last_file_index = -1; |
| 3872 | finfo.toc_symindx = -1; |
| 3873 | finfo.internal_syms = NULL; |
| 3874 | finfo.sym_indices = NULL; |
| 3875 | finfo.outsyms = NULL; |
| 3876 | finfo.linenos = NULL; |
| 3877 | finfo.contents = NULL; |
| 3878 | finfo.external_relocs = NULL; |
| 3879 | |
| 3880 | finfo.ldsym = ((struct external_ldsym *) |
| 3881 | (xcoff_hash_table (info)->loader_section->contents |
| 3882 | + LDHDRSZ)); |
| 3883 | finfo.ldrel = ((struct external_ldrel *) |
| 3884 | (xcoff_hash_table (info)->loader_section->contents |
| 3885 | + LDHDRSZ |
| 3886 | + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ)); |
| 3887 | |
| 3888 | xcoff_data (abfd)->coff.link_info = info; |
| 3889 | |
| 3890 | finfo.strtab = _bfd_stringtab_init (); |
| 3891 | if (finfo.strtab == NULL) |
| 3892 | goto error_return; |
| 3893 | |
| 3894 | /* Count the line number and relocation entries required for the |
| 3895 | output file. Determine a few maximum sizes. */ |
| 3896 | max_contents_size = 0; |
| 3897 | max_lineno_count = 0; |
| 3898 | max_reloc_count = 0; |
| 3899 | for (o = abfd->sections; o != NULL; o = o->next) |
| 3900 | { |
| 3901 | o->reloc_count = 0; |
| 3902 | o->lineno_count = 0; |
| 3903 | for (p = o->link_order_head; p != NULL; p = p->next) |
| 3904 | { |
| 3905 | if (p->type == bfd_indirect_link_order) |
| 3906 | { |
| 3907 | asection *sec; |
| 3908 | |
| 3909 | sec = p->u.indirect.section; |
| 3910 | |
| 3911 | /* Mark all sections which are to be included in the |
| 3912 | link. This will normally be every section. We need |
| 3913 | to do this so that we can identify any sections which |
| 3914 | the linker has decided to not include. */ |
| 3915 | sec->linker_mark = true; |
| 3916 | |
| 3917 | if (info->strip == strip_none |
| 3918 | || info->strip == strip_some) |
| 3919 | o->lineno_count += sec->lineno_count; |
| 3920 | |
| 3921 | o->reloc_count += sec->reloc_count; |
| 3922 | |
| 3923 | if (sec->_raw_size > max_contents_size) |
| 3924 | max_contents_size = sec->_raw_size; |
| 3925 | if (sec->lineno_count > max_lineno_count) |
| 3926 | max_lineno_count = sec->lineno_count; |
| 3927 | if (coff_section_data (sec->owner, sec) != NULL |
| 3928 | && xcoff_section_data (sec->owner, sec) != NULL |
| 3929 | && (xcoff_section_data (sec->owner, sec)->lineno_count |
| 3930 | > max_lineno_count)) |
| 3931 | max_lineno_count = |
| 3932 | xcoff_section_data (sec->owner, sec)->lineno_count; |
| 3933 | if (sec->reloc_count > max_reloc_count) |
| 3934 | max_reloc_count = sec->reloc_count; |
| 3935 | } |
| 3936 | else if (p->type == bfd_section_reloc_link_order |
| 3937 | || p->type == bfd_symbol_reloc_link_order) |
| 3938 | ++o->reloc_count; |
| 3939 | } |
| 3940 | } |
| 3941 | |
| 3942 | /* Compute the file positions for all the sections. */ |
| 3943 | if (abfd->output_has_begun) |
| 3944 | { |
| 3945 | if (xcoff_hash_table (info)->file_align != 0) |
| 3946 | abort (); |
| 3947 | } |
| 3948 | else |
| 3949 | { |
| 3950 | bfd_vma file_align; |
| 3951 | |
| 3952 | file_align = xcoff_hash_table (info)->file_align; |
| 3953 | if (file_align != 0) |
| 3954 | { |
| 3955 | boolean saw_contents; |
| 3956 | int indx; |
| 3957 | asection **op; |
| 3958 | file_ptr sofar; |
| 3959 | |
| 3960 | /* Insert .pad sections before every section which has |
| 3961 | contents and is loaded, if it is preceded by some other |
| 3962 | section which has contents and is loaded. */ |
| 3963 | saw_contents = true; |
| 3964 | for (op = &abfd->sections; *op != NULL; op = &(*op)->next) |
| 3965 | { |
| 3966 | if (strcmp ((*op)->name, ".pad") == 0) |
| 3967 | saw_contents = false; |
| 3968 | else if (((*op)->flags & SEC_HAS_CONTENTS) != 0 |
| 3969 | && ((*op)->flags & SEC_LOAD) != 0) |
| 3970 | { |
| 3971 | if (! saw_contents) |
| 3972 | saw_contents = true; |
| 3973 | else |
| 3974 | { |
| 3975 | asection *n, *hold; |
| 3976 | |
| 3977 | hold = *op; |
| 3978 | *op = NULL; |
| 3979 | n = bfd_make_section_anyway (abfd, ".pad"); |
| 3980 | BFD_ASSERT (*op == n); |
| 3981 | n->next = hold; |
| 3982 | n->flags = SEC_HAS_CONTENTS; |
| 3983 | n->alignment_power = 0; |
| 3984 | saw_contents = false; |
| 3985 | } |
| 3986 | } |
| 3987 | } |
| 3988 | |
| 3989 | /* Reset the section indices after inserting the new |
| 3990 | sections. */ |
| 3991 | indx = 0; |
| 3992 | for (o = abfd->sections; o != NULL; o = o->next) |
| 3993 | { |
| 3994 | ++indx; |
| 3995 | o->target_index = indx; |
| 3996 | } |
| 3997 | BFD_ASSERT ((unsigned int) indx == abfd->section_count); |
| 3998 | |
| 3999 | /* Work out appropriate sizes for the .pad sections to force |
| 4000 | each section to land on a page boundary. This bit of |
| 4001 | code knows what compute_section_file_positions is going |
| 4002 | to do. */ |
| 4003 | sofar = bfd_coff_filhsz (abfd); |
| 4004 | sofar += bfd_coff_aoutsz (abfd); |
| 4005 | sofar += abfd->section_count * bfd_coff_scnhsz (abfd); |
| 4006 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4007 | if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff) |
| 4008 | sofar += bfd_coff_scnhsz (abfd); |
| 4009 | |
| 4010 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4011 | { |
| 4012 | if (strcmp (o->name, ".pad") == 0) |
| 4013 | { |
| 4014 | bfd_vma pageoff; |
| 4015 | |
| 4016 | BFD_ASSERT (o->_raw_size == 0); |
| 4017 | pageoff = sofar & (file_align - 1); |
| 4018 | if (pageoff != 0) |
| 4019 | { |
| 4020 | o->_raw_size = file_align - pageoff; |
| 4021 | sofar += file_align - pageoff; |
| 4022 | o->flags |= SEC_HAS_CONTENTS; |
| 4023 | } |
| 4024 | } |
| 4025 | else |
| 4026 | { |
| 4027 | if ((o->flags & SEC_HAS_CONTENTS) != 0) |
| 4028 | sofar += BFD_ALIGN (o->_raw_size, |
| 4029 | 1 << o->alignment_power); |
| 4030 | } |
| 4031 | } |
| 4032 | } |
| 4033 | |
| 4034 | if (! bfd_coff_compute_section_file_positions (abfd)) |
| 4035 | goto error_return; |
| 4036 | } |
| 4037 | |
| 4038 | /* Allocate space for the pointers we need to keep for the relocs. */ |
| 4039 | { |
| 4040 | unsigned int i; |
| 4041 | |
| 4042 | /* We use section_count + 1, rather than section_count, because |
| 4043 | the target_index fields are 1 based. */ |
| 4044 | finfo.section_info = |
| 4045 | ((struct xcoff_link_section_info *) |
| 4046 | bfd_malloc ((abfd->section_count + 1) |
| 4047 | * sizeof (struct xcoff_link_section_info))); |
| 4048 | if (finfo.section_info == NULL) |
| 4049 | goto error_return; |
| 4050 | for (i = 0; i <= abfd->section_count; i++) |
| 4051 | { |
| 4052 | finfo.section_info[i].relocs = NULL; |
| 4053 | finfo.section_info[i].rel_hashes = NULL; |
| 4054 | finfo.section_info[i].toc_rel_hashes = NULL; |
| 4055 | } |
| 4056 | } |
| 4057 | |
| 4058 | /* Set the file positions for the relocs. */ |
| 4059 | rel_filepos = obj_relocbase (abfd); |
| 4060 | relsz = bfd_coff_relsz (abfd); |
| 4061 | max_output_reloc_count = 0; |
| 4062 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4063 | { |
| 4064 | if (o->reloc_count == 0) |
| 4065 | o->rel_filepos = 0; |
| 4066 | else |
| 4067 | { |
| 4068 | /* A stripped file has no relocs. However, we still |
| 4069 | allocate the buffers, so that later code doesn't have to |
| 4070 | worry about whether we are stripping or not. */ |
| 4071 | if (info->strip == strip_all) |
| 4072 | o->rel_filepos = 0; |
| 4073 | else |
| 4074 | { |
| 4075 | o->flags |= SEC_RELOC; |
| 4076 | o->rel_filepos = rel_filepos; |
| 4077 | rel_filepos += o->reloc_count * relsz; |
| 4078 | } |
| 4079 | |
| 4080 | /* We don't know the indices of global symbols until we have |
| 4081 | written out all the local symbols. For each section in |
| 4082 | the output file, we keep an array of pointers to hash |
| 4083 | table entries. Each entry in the array corresponds to a |
| 4084 | reloc. When we find a reloc against a global symbol, we |
| 4085 | set the corresponding entry in this array so that we can |
| 4086 | fix up the symbol index after we have written out all the |
| 4087 | local symbols. |
| 4088 | |
| 4089 | Because of this problem, we also keep the relocs in |
| 4090 | memory until the end of the link. This wastes memory. |
| 4091 | We could backpatch the file later, I suppose, although it |
| 4092 | would be slow. */ |
| 4093 | finfo.section_info[o->target_index].relocs = |
| 4094 | ((struct internal_reloc *) |
| 4095 | bfd_malloc (o->reloc_count * sizeof (struct internal_reloc))); |
| 4096 | finfo.section_info[o->target_index].rel_hashes = |
| 4097 | ((struct xcoff_link_hash_entry **) |
| 4098 | bfd_malloc (o->reloc_count |
| 4099 | * sizeof (struct xcoff_link_hash_entry *))); |
| 4100 | if (finfo.section_info[o->target_index].relocs == NULL |
| 4101 | || finfo.section_info[o->target_index].rel_hashes == NULL) |
| 4102 | goto error_return; |
| 4103 | |
| 4104 | if (o->reloc_count > max_output_reloc_count) |
| 4105 | max_output_reloc_count = o->reloc_count; |
| 4106 | } |
| 4107 | } |
| 4108 | |
| 4109 | /* We now know the size of the relocs, so we can determine the file |
| 4110 | positions of the line numbers. */ |
| 4111 | line_filepos = rel_filepos; |
| 4112 | finfo.line_filepos = line_filepos; |
| 4113 | linesz = bfd_coff_linesz (abfd); |
| 4114 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4115 | { |
| 4116 | if (o->lineno_count == 0) |
| 4117 | o->line_filepos = 0; |
| 4118 | else |
| 4119 | { |
| 4120 | o->line_filepos = line_filepos; |
| 4121 | line_filepos += o->lineno_count * linesz; |
| 4122 | } |
| 4123 | |
| 4124 | /* Reset the reloc and lineno counts, so that we can use them to |
| 4125 | count the number of entries we have output so far. */ |
| 4126 | o->reloc_count = 0; |
| 4127 | o->lineno_count = 0; |
| 4128 | } |
| 4129 | |
| 4130 | obj_sym_filepos (abfd) = line_filepos; |
| 4131 | |
| 4132 | /* Figure out the largest number of symbols in an input BFD. Take |
| 4133 | the opportunity to clear the output_has_begun fields of all the |
| 4134 | input BFD's. We want at least 6 symbols, since that is the |
| 4135 | number which xcoff_write_global_symbol may need. */ |
| 4136 | max_sym_count = 6; |
| 4137 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 4138 | { |
| 4139 | size_t sz; |
| 4140 | |
| 4141 | sub->output_has_begun = false; |
| 4142 | sz = obj_raw_syment_count (sub); |
| 4143 | if (sz > max_sym_count) |
| 4144 | max_sym_count = sz; |
| 4145 | } |
| 4146 | |
| 4147 | /* Allocate some buffers used while linking. */ |
| 4148 | finfo.internal_syms = ((struct internal_syment *) |
| 4149 | bfd_malloc (max_sym_count |
| 4150 | * sizeof (struct internal_syment))); |
| 4151 | finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); |
| 4152 | finfo.outsyms = ((bfd_byte *) |
| 4153 | bfd_malloc ((size_t) ((max_sym_count + 1) * symesz))); |
| 4154 | finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count |
| 4155 | * bfd_coff_linesz (abfd)); |
| 4156 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
| 4157 | finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz); |
| 4158 | if ((finfo.internal_syms == NULL && max_sym_count > 0) |
| 4159 | || (finfo.sym_indices == NULL && max_sym_count > 0) |
| 4160 | || finfo.outsyms == NULL |
| 4161 | || (finfo.linenos == NULL && max_lineno_count > 0) |
| 4162 | || (finfo.contents == NULL && max_contents_size > 0) |
| 4163 | || (finfo.external_relocs == NULL && max_reloc_count > 0)) |
| 4164 | goto error_return; |
| 4165 | |
| 4166 | obj_raw_syment_count (abfd) = 0; |
| 4167 | xcoff_data (abfd)->toc = (bfd_vma) -1; |
| 4168 | |
| 4169 | /* We now know the position of everything in the file, except that |
| 4170 | we don't know the size of the symbol table and therefore we don't |
| 4171 | know where the string table starts. We just build the string |
| 4172 | table in memory as we go along. We process all the relocations |
| 4173 | for a single input file at once. */ |
| 4174 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4175 | { |
| 4176 | for (p = o->link_order_head; p != NULL; p = p->next) |
| 4177 | { |
| 4178 | if (p->type == bfd_indirect_link_order |
| 4179 | && p->u.indirect.section->owner->xvec == abfd->xvec) |
| 4180 | { |
| 4181 | sub = p->u.indirect.section->owner; |
| 4182 | if (! sub->output_has_begun) |
| 4183 | { |
| 4184 | if (! xcoff_link_input_bfd (&finfo, sub)) |
| 4185 | goto error_return; |
| 4186 | sub->output_has_begun = true; |
| 4187 | } |
| 4188 | } |
| 4189 | else if (p->type == bfd_section_reloc_link_order |
| 4190 | || p->type == bfd_symbol_reloc_link_order) |
| 4191 | { |
| 4192 | if (! xcoff_reloc_link_order (abfd, &finfo, o, p)) |
| 4193 | goto error_return; |
| 4194 | } |
| 4195 | else |
| 4196 | { |
| 4197 | if (! _bfd_default_link_order (abfd, info, o, p)) |
| 4198 | goto error_return; |
| 4199 | } |
| 4200 | } |
| 4201 | } |
| 4202 | |
| 4203 | /* Free up the buffers used by xcoff_link_input_bfd. */ |
| 4204 | |
| 4205 | if (finfo.internal_syms != NULL) |
| 4206 | { |
| 4207 | free (finfo.internal_syms); |
| 4208 | finfo.internal_syms = NULL; |
| 4209 | } |
| 4210 | if (finfo.sym_indices != NULL) |
| 4211 | { |
| 4212 | free (finfo.sym_indices); |
| 4213 | finfo.sym_indices = NULL; |
| 4214 | } |
| 4215 | if (finfo.linenos != NULL) |
| 4216 | { |
| 4217 | free (finfo.linenos); |
| 4218 | finfo.linenos = NULL; |
| 4219 | } |
| 4220 | if (finfo.contents != NULL) |
| 4221 | { |
| 4222 | free (finfo.contents); |
| 4223 | finfo.contents = NULL; |
| 4224 | } |
| 4225 | if (finfo.external_relocs != NULL) |
| 4226 | { |
| 4227 | free (finfo.external_relocs); |
| 4228 | finfo.external_relocs = NULL; |
| 4229 | } |
| 4230 | |
| 4231 | /* The value of the last C_FILE symbol is supposed to be -1. Write |
| 4232 | it out again. */ |
| 4233 | if (finfo.last_file_index != -1) |
| 4234 | { |
| 4235 | finfo.last_file.n_value = -1; |
| 4236 | bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, |
| 4237 | (PTR) finfo.outsyms); |
| 4238 | if (bfd_seek (abfd, |
| 4239 | (obj_sym_filepos (abfd) |
| 4240 | + finfo.last_file_index * symesz), |
| 4241 | SEEK_SET) != 0 |
| 4242 | || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) |
| 4243 | goto error_return; |
| 4244 | } |
| 4245 | |
| 4246 | /* Write out all the global symbols which do not come from XCOFF |
| 4247 | input files. */ |
| 4248 | xcoff_link_hash_traverse (xcoff_hash_table (info), |
| 4249 | xcoff_write_global_symbol, |
| 4250 | (PTR) &finfo); |
| 4251 | |
| 4252 | if (finfo.outsyms != NULL) |
| 4253 | { |
| 4254 | free (finfo.outsyms); |
| 4255 | finfo.outsyms = NULL; |
| 4256 | } |
| 4257 | |
| 4258 | /* Now that we have written out all the global symbols, we know the |
| 4259 | symbol indices to use for relocs against them, and we can finally |
| 4260 | write out the relocs. */ |
| 4261 | external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz); |
| 4262 | if (external_relocs == NULL && max_output_reloc_count != 0) |
| 4263 | goto error_return; |
| 4264 | |
| 4265 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4266 | { |
| 4267 | struct internal_reloc *irel; |
| 4268 | struct internal_reloc *irelend; |
| 4269 | struct xcoff_link_hash_entry **rel_hash; |
| 4270 | struct xcoff_toc_rel_hash *toc_rel_hash; |
| 4271 | bfd_byte *erel; |
| 4272 | |
| 4273 | /* A stripped file has no relocs. */ |
| 4274 | if (info->strip == strip_all) |
| 4275 | { |
| 4276 | o->reloc_count = 0; |
| 4277 | continue; |
| 4278 | } |
| 4279 | |
| 4280 | if (o->reloc_count == 0) |
| 4281 | continue; |
| 4282 | |
| 4283 | irel = finfo.section_info[o->target_index].relocs; |
| 4284 | irelend = irel + o->reloc_count; |
| 4285 | rel_hash = finfo.section_info[o->target_index].rel_hashes; |
| 4286 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| 4287 | { |
| 4288 | if (*rel_hash != NULL) |
| 4289 | { |
| 4290 | if ((*rel_hash)->indx < 0) |
| 4291 | { |
| 4292 | if (! ((*info->callbacks->unattached_reloc) |
| 4293 | (info, (*rel_hash)->root.root.string, |
| 4294 | (bfd *) NULL, o, irel->r_vaddr))) |
| 4295 | goto error_return; |
| 4296 | (*rel_hash)->indx = 0; |
| 4297 | } |
| 4298 | irel->r_symndx = (*rel_hash)->indx; |
| 4299 | } |
| 4300 | } |
| 4301 | |
| 4302 | for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes; |
| 4303 | toc_rel_hash != NULL; |
| 4304 | toc_rel_hash = toc_rel_hash->next) |
| 4305 | { |
| 4306 | if (toc_rel_hash->h->u.toc_indx < 0) |
| 4307 | { |
| 4308 | if (! ((*info->callbacks->unattached_reloc) |
| 4309 | (info, toc_rel_hash->h->root.root.string, |
| 4310 | (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr))) |
| 4311 | goto error_return; |
| 4312 | toc_rel_hash->h->u.toc_indx = 0; |
| 4313 | } |
| 4314 | toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx; |
| 4315 | } |
| 4316 | |
| 4317 | /* XCOFF requires that the relocs be sorted by address. We tend |
| 4318 | to produce them in the order in which their containing csects |
| 4319 | appear in the symbol table, which is not necessarily by |
| 4320 | address. So we sort them here. There may be a better way to |
| 4321 | do this. */ |
| 4322 | qsort ((PTR) finfo.section_info[o->target_index].relocs, |
| 4323 | o->reloc_count, sizeof (struct internal_reloc), |
| 4324 | xcoff_sort_relocs); |
| 4325 | |
| 4326 | irel = finfo.section_info[o->target_index].relocs; |
| 4327 | irelend = irel + o->reloc_count; |
| 4328 | erel = external_relocs; |
| 4329 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| 4330 | bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); |
| 4331 | |
| 4332 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 |
| 4333 | || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, |
| 4334 | abfd) != relsz * o->reloc_count) |
| 4335 | goto error_return; |
| 4336 | } |
| 4337 | |
| 4338 | if (external_relocs != NULL) |
| 4339 | { |
| 4340 | free (external_relocs); |
| 4341 | external_relocs = NULL; |
| 4342 | } |
| 4343 | |
| 4344 | /* Free up the section information. */ |
| 4345 | if (finfo.section_info != NULL) |
| 4346 | { |
| 4347 | unsigned int i; |
| 4348 | |
| 4349 | for (i = 0; i < abfd->section_count; i++) |
| 4350 | { |
| 4351 | if (finfo.section_info[i].relocs != NULL) |
| 4352 | free (finfo.section_info[i].relocs); |
| 4353 | if (finfo.section_info[i].rel_hashes != NULL) |
| 4354 | free (finfo.section_info[i].rel_hashes); |
| 4355 | } |
| 4356 | free (finfo.section_info); |
| 4357 | finfo.section_info = NULL; |
| 4358 | } |
| 4359 | |
| 4360 | /* Write out the loader section contents. */ |
| 4361 | BFD_ASSERT ((bfd_byte *) finfo.ldrel |
| 4362 | == (xcoff_hash_table (info)->loader_section->contents |
| 4363 | + xcoff_hash_table (info)->ldhdr.l_impoff)); |
| 4364 | o = xcoff_hash_table (info)->loader_section; |
| 4365 | if (! bfd_set_section_contents (abfd, o->output_section, |
| 4366 | o->contents, o->output_offset, |
| 4367 | o->_raw_size)) |
| 4368 | goto error_return; |
| 4369 | |
| 4370 | /* Write out the magic sections. */ |
| 4371 | o = xcoff_hash_table (info)->linkage_section; |
| 4372 | if (o->_raw_size > 0 |
| 4373 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 4374 | o->output_offset, o->_raw_size)) |
| 4375 | goto error_return; |
| 4376 | o = xcoff_hash_table (info)->toc_section; |
| 4377 | if (o->_raw_size > 0 |
| 4378 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 4379 | o->output_offset, o->_raw_size)) |
| 4380 | goto error_return; |
| 4381 | o = xcoff_hash_table (info)->descriptor_section; |
| 4382 | if (o->_raw_size > 0 |
| 4383 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| 4384 | o->output_offset, o->_raw_size)) |
| 4385 | goto error_return; |
| 4386 | |
| 4387 | /* Write out the string table. */ |
| 4388 | if (bfd_seek (abfd, |
| 4389 | (obj_sym_filepos (abfd) |
| 4390 | + obj_raw_syment_count (abfd) * symesz), |
| 4391 | SEEK_SET) != 0) |
| 4392 | goto error_return; |
| 4393 | bfd_h_put_32 (abfd, |
| 4394 | _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, |
| 4395 | (bfd_byte *) strbuf); |
| 4396 | if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) |
| 4397 | goto error_return; |
| 4398 | if (! _bfd_stringtab_emit (abfd, finfo.strtab)) |
| 4399 | goto error_return; |
| 4400 | |
| 4401 | _bfd_stringtab_free (finfo.strtab); |
| 4402 | |
| 4403 | /* Write out the debugging string table. */ |
| 4404 | o = xcoff_hash_table (info)->debug_section; |
| 4405 | if (o != NULL) |
| 4406 | { |
| 4407 | struct bfd_strtab_hash *debug_strtab; |
| 4408 | |
| 4409 | debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| 4410 | BFD_ASSERT (o->output_section->_raw_size - o->output_offset |
| 4411 | >= _bfd_stringtab_size (debug_strtab)); |
| 4412 | if (bfd_seek (abfd, |
| 4413 | o->output_section->filepos + o->output_offset, |
| 4414 | SEEK_SET) != 0) |
| 4415 | goto error_return; |
| 4416 | if (! _bfd_stringtab_emit (abfd, debug_strtab)) |
| 4417 | goto error_return; |
| 4418 | } |
| 4419 | |
| 4420 | /* Setting bfd_get_symcount to 0 will cause write_object_contents to |
| 4421 | not try to write out the symbols. */ |
| 4422 | bfd_get_symcount (abfd) = 0; |
| 4423 | |
| 4424 | return true; |
| 4425 | |
| 4426 | error_return: |
| 4427 | if (finfo.strtab != NULL) |
| 4428 | _bfd_stringtab_free (finfo.strtab); |
| 4429 | if (finfo.section_info != NULL) |
| 4430 | { |
| 4431 | unsigned int i; |
| 4432 | |
| 4433 | for (i = 0; i < abfd->section_count; i++) |
| 4434 | { |
| 4435 | if (finfo.section_info[i].relocs != NULL) |
| 4436 | free (finfo.section_info[i].relocs); |
| 4437 | if (finfo.section_info[i].rel_hashes != NULL) |
| 4438 | free (finfo.section_info[i].rel_hashes); |
| 4439 | } |
| 4440 | free (finfo.section_info); |
| 4441 | } |
| 4442 | if (finfo.internal_syms != NULL) |
| 4443 | free (finfo.internal_syms); |
| 4444 | if (finfo.sym_indices != NULL) |
| 4445 | free (finfo.sym_indices); |
| 4446 | if (finfo.outsyms != NULL) |
| 4447 | free (finfo.outsyms); |
| 4448 | if (finfo.linenos != NULL) |
| 4449 | free (finfo.linenos); |
| 4450 | if (finfo.contents != NULL) |
| 4451 | free (finfo.contents); |
| 4452 | if (finfo.external_relocs != NULL) |
| 4453 | free (finfo.external_relocs); |
| 4454 | if (external_relocs != NULL) |
| 4455 | free (external_relocs); |
| 4456 | return false; |
| 4457 | } |
| 4458 | |
| 4459 | /* Link an input file into the linker output file. This function |
| 4460 | handles all the sections and relocations of the input file at once. */ |
| 4461 | |
| 4462 | static boolean |
| 4463 | xcoff_link_input_bfd (finfo, input_bfd) |
| 4464 | struct xcoff_final_link_info *finfo; |
| 4465 | bfd *input_bfd; |
| 4466 | { |
| 4467 | bfd *output_bfd; |
| 4468 | const char *strings; |
| 4469 | bfd_size_type syment_base; |
| 4470 | unsigned int n_tmask; |
| 4471 | unsigned int n_btshft; |
| 4472 | boolean copy, hash; |
| 4473 | bfd_size_type isymesz; |
| 4474 | bfd_size_type osymesz; |
| 4475 | bfd_size_type linesz; |
| 4476 | bfd_byte *esym; |
| 4477 | bfd_byte *esym_end; |
| 4478 | struct xcoff_link_hash_entry **sym_hash; |
| 4479 | struct internal_syment *isymp; |
| 4480 | asection **csectpp; |
| 4481 | unsigned long *debug_index; |
| 4482 | long *indexp; |
| 4483 | unsigned long output_index; |
| 4484 | bfd_byte *outsym; |
| 4485 | unsigned int incls; |
| 4486 | asection *oline; |
| 4487 | boolean keep_syms; |
| 4488 | asection *o; |
| 4489 | |
| 4490 | /* We can just skip DYNAMIC files, unless this is a static link. */ |
| 4491 | if ((input_bfd->flags & DYNAMIC) != 0 |
| 4492 | && ! finfo->info->static_link) |
| 4493 | return true; |
| 4494 | |
| 4495 | /* Move all the symbols to the output file. */ |
| 4496 | |
| 4497 | output_bfd = finfo->output_bfd; |
| 4498 | strings = NULL; |
| 4499 | syment_base = obj_raw_syment_count (output_bfd); |
| 4500 | isymesz = bfd_coff_symesz (input_bfd); |
| 4501 | osymesz = bfd_coff_symesz (output_bfd); |
| 4502 | linesz = bfd_coff_linesz (input_bfd); |
| 4503 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); |
| 4504 | |
| 4505 | n_tmask = coff_data (input_bfd)->local_n_tmask; |
| 4506 | n_btshft = coff_data (input_bfd)->local_n_btshft; |
| 4507 | |
| 4508 | /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| 4509 | #define N_TMASK n_tmask |
| 4510 | #define N_BTSHFT n_btshft |
| 4511 | |
| 4512 | copy = false; |
| 4513 | if (! finfo->info->keep_memory) |
| 4514 | copy = true; |
| 4515 | hash = true; |
| 4516 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 4517 | hash = false; |
| 4518 | |
| 4519 | if (! _bfd_coff_get_external_symbols (input_bfd)) |
| 4520 | return false; |
| 4521 | |
| 4522 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 4523 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 4524 | sym_hash = obj_xcoff_sym_hashes (input_bfd); |
| 4525 | csectpp = xcoff_data (input_bfd)->csects; |
| 4526 | debug_index = xcoff_data (input_bfd)->debug_indices; |
| 4527 | isymp = finfo->internal_syms; |
| 4528 | indexp = finfo->sym_indices; |
| 4529 | output_index = syment_base; |
| 4530 | outsym = finfo->outsyms; |
| 4531 | incls = 0; |
| 4532 | oline = NULL; |
| 4533 | |
| 4534 | while (esym < esym_end) |
| 4535 | { |
| 4536 | struct internal_syment isym; |
| 4537 | union internal_auxent aux; |
| 4538 | int smtyp = 0; |
| 4539 | boolean skip; |
| 4540 | boolean require; |
| 4541 | int add; |
| 4542 | |
| 4543 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); |
| 4544 | |
| 4545 | /* If this is a C_EXT or C_HIDEXT symbol, we need the csect |
| 4546 | information. */ |
| 4547 | if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT) |
| 4548 | { |
| 4549 | BFD_ASSERT (isymp->n_numaux > 0); |
| 4550 | bfd_coff_swap_aux_in (input_bfd, |
| 4551 | (PTR) (esym + isymesz * isymp->n_numaux), |
| 4552 | isymp->n_type, isymp->n_sclass, |
| 4553 | isymp->n_numaux - 1, isymp->n_numaux, |
| 4554 | (PTR) &aux); |
| 4555 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| 4556 | } |
| 4557 | |
| 4558 | /* Make a copy of *isymp so that the relocate_section function |
| 4559 | always sees the original values. This is more reliable than |
| 4560 | always recomputing the symbol value even if we are stripping |
| 4561 | the symbol. */ |
| 4562 | isym = *isymp; |
| 4563 | |
| 4564 | /* If this symbol is in the .loader section, swap out the |
| 4565 | .loader symbol information. If this is an external symbol |
| 4566 | reference to a defined symbol, though, then wait until we get |
| 4567 | to the definition. */ |
| 4568 | if (isym.n_sclass == C_EXT |
| 4569 | && *sym_hash != NULL |
| 4570 | && (*sym_hash)->ldsym != NULL |
| 4571 | && (smtyp != XTY_ER |
| 4572 | || (*sym_hash)->root.type == bfd_link_hash_undefined)) |
| 4573 | { |
| 4574 | struct xcoff_link_hash_entry *h; |
| 4575 | struct internal_ldsym *ldsym; |
| 4576 | |
| 4577 | h = *sym_hash; |
| 4578 | ldsym = h->ldsym; |
| 4579 | if (isym.n_scnum > 0) |
| 4580 | { |
| 4581 | ldsym->l_scnum = (*csectpp)->output_section->target_index; |
| 4582 | ldsym->l_value = (isym.n_value |
| 4583 | + (*csectpp)->output_section->vma |
| 4584 | + (*csectpp)->output_offset |
| 4585 | - (*csectpp)->vma); |
| 4586 | } |
| 4587 | else |
| 4588 | { |
| 4589 | ldsym->l_scnum = isym.n_scnum; |
| 4590 | ldsym->l_value = isym.n_value; |
| 4591 | } |
| 4592 | |
| 4593 | ldsym->l_smtype = smtyp; |
| 4594 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| 4595 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 4596 | || (h->flags & XCOFF_IMPORT) != 0) |
| 4597 | ldsym->l_smtype |= L_IMPORT; |
| 4598 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| 4599 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 4600 | || (h->flags & XCOFF_EXPORT) != 0) |
| 4601 | ldsym->l_smtype |= L_EXPORT; |
| 4602 | if ((h->flags & XCOFF_ENTRY) != 0) |
| 4603 | ldsym->l_smtype |= L_ENTRY; |
| 4604 | |
| 4605 | ldsym->l_smclas = aux.x_csect.x_smclas; |
| 4606 | |
| 4607 | if (ldsym->l_ifile == (bfd_size_type) -1) |
| 4608 | ldsym->l_ifile = 0; |
| 4609 | else if (ldsym->l_ifile == 0) |
| 4610 | { |
| 4611 | if ((ldsym->l_smtype & L_IMPORT) == 0) |
| 4612 | ldsym->l_ifile = 0; |
| 4613 | else |
| 4614 | { |
| 4615 | bfd *impbfd; |
| 4616 | |
| 4617 | if (h->root.type == bfd_link_hash_defined |
| 4618 | || h->root.type == bfd_link_hash_defweak) |
| 4619 | impbfd = h->root.u.def.section->owner; |
| 4620 | else if (h->root.type == bfd_link_hash_undefined |
| 4621 | || h->root.type == bfd_link_hash_undefweak) |
| 4622 | impbfd = h->root.u.undef.abfd; |
| 4623 | else |
| 4624 | impbfd = NULL; |
| 4625 | |
| 4626 | if (impbfd == NULL) |
| 4627 | ldsym->l_ifile = 0; |
| 4628 | else |
| 4629 | { |
| 4630 | BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec); |
| 4631 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| 4632 | } |
| 4633 | } |
| 4634 | } |
| 4635 | |
| 4636 | ldsym->l_parm = 0; |
| 4637 | |
| 4638 | BFD_ASSERT (h->ldindx >= 0); |
| 4639 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); |
| 4640 | xcoff_swap_ldsym_out (finfo->output_bfd, ldsym, |
| 4641 | finfo->ldsym + h->ldindx - 3); |
| 4642 | h->ldsym = NULL; |
| 4643 | |
| 4644 | /* Fill in snentry now that we know the target_index. */ |
| 4645 | if ((h->flags & XCOFF_ENTRY) != 0 |
| 4646 | && (h->root.type == bfd_link_hash_defined |
| 4647 | || h->root.type == bfd_link_hash_defweak)) |
| 4648 | xcoff_data (output_bfd)->snentry = |
| 4649 | h->root.u.def.section->output_section->target_index; |
| 4650 | } |
| 4651 | |
| 4652 | *indexp = -1; |
| 4653 | |
| 4654 | skip = false; |
| 4655 | require = false; |
| 4656 | add = 1 + isym.n_numaux; |
| 4657 | |
| 4658 | /* If we are skipping this csect, we want to skip this symbol. */ |
| 4659 | if (*csectpp == NULL) |
| 4660 | skip = true; |
| 4661 | |
| 4662 | /* If we garbage collected this csect, we want to skip this |
| 4663 | symbol. */ |
| 4664 | if (! skip |
| 4665 | && xcoff_hash_table (finfo->info)->gc |
| 4666 | && ((*csectpp)->flags & SEC_MARK) == 0 |
| 4667 | && *csectpp != bfd_abs_section_ptr) |
| 4668 | skip = true; |
| 4669 | |
| 4670 | /* An XCOFF linker always skips C_STAT symbols. */ |
| 4671 | if (! skip |
| 4672 | && isymp->n_sclass == C_STAT) |
| 4673 | skip = true; |
| 4674 | |
| 4675 | /* We skip all but the first TOC anchor. */ |
| 4676 | if (! skip |
| 4677 | && isymp->n_sclass == C_HIDEXT |
| 4678 | && aux.x_csect.x_smclas == XMC_TC0) |
| 4679 | { |
| 4680 | if (finfo->toc_symindx != -1) |
| 4681 | skip = true; |
| 4682 | else |
| 4683 | { |
| 4684 | bfd_vma tocval, tocend; |
| 4685 | |
| 4686 | tocval = ((*csectpp)->output_section->vma |
| 4687 | + (*csectpp)->output_offset |
| 4688 | + isym.n_value |
| 4689 | - (*csectpp)->vma); |
| 4690 | /* We want to find out if tocval is a good value to use |
| 4691 | as the TOC anchor--that is, whether we can access all |
| 4692 | of the TOC using a 16 bit offset from tocval. This |
| 4693 | test assumes that the TOC comes at the end of the |
| 4694 | output section, as it does in the default linker |
| 4695 | script. FIXME: This doesn't handle .tocbss sections |
| 4696 | created from XMC_TD common symbols correctly. */ |
| 4697 | |
| 4698 | tocend = ((*csectpp)->output_section->vma |
| 4699 | + (*csectpp)->output_section->_raw_size); |
| 4700 | |
| 4701 | if (tocval + 0x10000 < tocend) |
| 4702 | { |
| 4703 | (*_bfd_error_handler) |
| 4704 | (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"), |
| 4705 | (unsigned long) (tocend - tocval)); |
| 4706 | bfd_set_error (bfd_error_file_too_big); |
| 4707 | return false; |
| 4708 | } |
| 4709 | |
| 4710 | if (tocval + 0x8000 < tocend) |
| 4711 | { |
| 4712 | bfd_vma tocadd; |
| 4713 | |
| 4714 | tocadd = tocend - (tocval + 0x8000); |
| 4715 | tocval += tocadd; |
| 4716 | isym.n_value += tocadd; |
| 4717 | } |
| 4718 | |
| 4719 | finfo->toc_symindx = output_index; |
| 4720 | xcoff_data (finfo->output_bfd)->toc = tocval; |
| 4721 | xcoff_data (finfo->output_bfd)->sntoc = |
| 4722 | (*csectpp)->output_section->target_index; |
| 4723 | require = true; |
| 4724 | } |
| 4725 | } |
| 4726 | |
| 4727 | /* If we are stripping all symbols, we want to skip this one. */ |
| 4728 | if (! skip |
| 4729 | && finfo->info->strip == strip_all) |
| 4730 | skip = true; |
| 4731 | |
| 4732 | /* We can skip resolved external references. */ |
| 4733 | if (! skip |
| 4734 | && isym.n_sclass == C_EXT |
| 4735 | && smtyp == XTY_ER |
| 4736 | && (*sym_hash)->root.type != bfd_link_hash_undefined) |
| 4737 | skip = true; |
| 4738 | |
| 4739 | /* We can skip common symbols if they got defined somewhere |
| 4740 | else. */ |
| 4741 | if (! skip |
| 4742 | && isym.n_sclass == C_EXT |
| 4743 | && smtyp == XTY_CM |
| 4744 | && ((*sym_hash)->root.type != bfd_link_hash_common |
| 4745 | || (*sym_hash)->root.u.c.p->section != *csectpp) |
| 4746 | && ((*sym_hash)->root.type != bfd_link_hash_defined |
| 4747 | || (*sym_hash)->root.u.def.section != *csectpp)) |
| 4748 | skip = true; |
| 4749 | |
| 4750 | /* Skip local symbols if we are discarding them. */ |
| 4751 | if (! skip |
| 4752 | && finfo->info->discard == discard_all |
| 4753 | && isym.n_sclass != C_EXT |
| 4754 | && (isym.n_sclass != C_HIDEXT |
| 4755 | || smtyp != XTY_SD)) |
| 4756 | skip = true; |
| 4757 | |
| 4758 | /* If we stripping debugging symbols, and this is a debugging |
| 4759 | symbol, then skip it. */ |
| 4760 | if (! skip |
| 4761 | && finfo->info->strip == strip_debugger |
| 4762 | && isym.n_scnum == N_DEBUG) |
| 4763 | skip = true; |
| 4764 | |
| 4765 | /* If some symbols are stripped based on the name, work out the |
| 4766 | name and decide whether to skip this symbol. We don't handle |
| 4767 | this correctly for symbols whose names are in the .debug |
| 4768 | section; to get it right we would need a new bfd_strtab_hash |
| 4769 | function to return the string given the index. */ |
| 4770 | if (! skip |
| 4771 | && (finfo->info->strip == strip_some |
| 4772 | || finfo->info->discard == discard_l) |
| 4773 | && (debug_index == NULL || *debug_index == (unsigned long) -1)) |
| 4774 | { |
| 4775 | const char *name; |
| 4776 | char buf[SYMNMLEN + 1]; |
| 4777 | |
| 4778 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); |
| 4779 | if (name == NULL) |
| 4780 | return false; |
| 4781 | |
| 4782 | if ((finfo->info->strip == strip_some |
| 4783 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, |
| 4784 | false) == NULL)) |
| 4785 | || (finfo->info->discard == discard_l |
| 4786 | && (isym.n_sclass != C_EXT |
| 4787 | && (isym.n_sclass != C_HIDEXT |
| 4788 | || smtyp != XTY_SD)) |
| 4789 | && bfd_is_local_label_name (input_bfd, name))) |
| 4790 | skip = true; |
| 4791 | } |
| 4792 | |
| 4793 | /* We can not skip the first TOC anchor. */ |
| 4794 | if (skip |
| 4795 | && require |
| 4796 | && finfo->info->strip != strip_all) |
| 4797 | skip = false; |
| 4798 | |
| 4799 | /* We now know whether we are to skip this symbol or not. */ |
| 4800 | if (! skip) |
| 4801 | { |
| 4802 | /* Adjust the symbol in order to output it. */ |
| 4803 | |
| 4804 | if (isym._n._n_n._n_zeroes == 0 |
| 4805 | && isym._n._n_n._n_offset != 0) |
| 4806 | { |
| 4807 | /* This symbol has a long name. Enter it in the string |
| 4808 | table we are building. If *debug_index != -1, the |
| 4809 | name has already been entered in the .debug section. */ |
| 4810 | if (debug_index != NULL && *debug_index != (unsigned long) -1) |
| 4811 | isym._n._n_n._n_offset = *debug_index; |
| 4812 | else |
| 4813 | { |
| 4814 | const char *name; |
| 4815 | bfd_size_type indx; |
| 4816 | |
| 4817 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, |
| 4818 | (char *) NULL); |
| 4819 | if (name == NULL) |
| 4820 | return false; |
| 4821 | indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); |
| 4822 | if (indx == (bfd_size_type) -1) |
| 4823 | return false; |
| 4824 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 4825 | } |
| 4826 | } |
| 4827 | |
| 4828 | if (isym.n_sclass != C_BSTAT |
| 4829 | && isym.n_sclass != C_ESTAT |
| 4830 | && isym.n_sclass != C_DECL |
| 4831 | && isym.n_scnum > 0) |
| 4832 | { |
| 4833 | isym.n_scnum = (*csectpp)->output_section->target_index; |
| 4834 | isym.n_value += ((*csectpp)->output_section->vma |
| 4835 | + (*csectpp)->output_offset |
| 4836 | - (*csectpp)->vma); |
| 4837 | } |
| 4838 | |
| 4839 | /* The value of a C_FILE symbol is the symbol index of the |
| 4840 | next C_FILE symbol. The value of the last C_FILE symbol |
| 4841 | is -1. We try to get this right, below, just before we |
| 4842 | write the symbols out, but in the general case we may |
| 4843 | have to write the symbol out twice. */ |
| 4844 | if (isym.n_sclass == C_FILE) |
| 4845 | { |
| 4846 | if (finfo->last_file_index != -1 |
| 4847 | && finfo->last_file.n_value != (long) output_index) |
| 4848 | { |
| 4849 | /* We must correct the value of the last C_FILE entry. */ |
| 4850 | finfo->last_file.n_value = output_index; |
| 4851 | if ((bfd_size_type) finfo->last_file_index >= syment_base) |
| 4852 | { |
| 4853 | /* The last C_FILE symbol is in this input file. */ |
| 4854 | bfd_coff_swap_sym_out (output_bfd, |
| 4855 | (PTR) &finfo->last_file, |
| 4856 | (PTR) (finfo->outsyms |
| 4857 | + ((finfo->last_file_index |
| 4858 | - syment_base) |
| 4859 | * osymesz))); |
| 4860 | } |
| 4861 | else |
| 4862 | { |
| 4863 | /* We have already written out the last C_FILE |
| 4864 | symbol. We need to write it out again. We |
| 4865 | borrow *outsym temporarily. */ |
| 4866 | bfd_coff_swap_sym_out (output_bfd, |
| 4867 | (PTR) &finfo->last_file, |
| 4868 | (PTR) outsym); |
| 4869 | if (bfd_seek (output_bfd, |
| 4870 | (obj_sym_filepos (output_bfd) |
| 4871 | + finfo->last_file_index * osymesz), |
| 4872 | SEEK_SET) != 0 |
| 4873 | || (bfd_write (outsym, osymesz, 1, output_bfd) |
| 4874 | != osymesz)) |
| 4875 | return false; |
| 4876 | } |
| 4877 | } |
| 4878 | |
| 4879 | finfo->last_file_index = output_index; |
| 4880 | finfo->last_file = isym; |
| 4881 | } |
| 4882 | |
| 4883 | /* The value of a C_BINCL or C_EINCL symbol is a file offset |
| 4884 | into the line numbers. We update the symbol values when |
| 4885 | we handle the line numbers. */ |
| 4886 | if (isym.n_sclass == C_BINCL |
| 4887 | || isym.n_sclass == C_EINCL) |
| 4888 | { |
| 4889 | isym.n_value = finfo->line_filepos; |
| 4890 | ++incls; |
| 4891 | } |
| 4892 | |
| 4893 | /* Output the symbol. */ |
| 4894 | |
| 4895 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| 4896 | |
| 4897 | *indexp = output_index; |
| 4898 | |
| 4899 | if (isym.n_sclass == C_EXT) |
| 4900 | { |
| 4901 | long indx; |
| 4902 | struct xcoff_link_hash_entry *h; |
| 4903 | |
| 4904 | indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) |
| 4905 | / isymesz); |
| 4906 | h = obj_xcoff_sym_hashes (input_bfd)[indx]; |
| 4907 | BFD_ASSERT (h != NULL); |
| 4908 | h->indx = output_index; |
| 4909 | } |
| 4910 | |
| 4911 | /* If this is a symbol in the TOC which we may have merged |
| 4912 | (class XMC_TC), remember the symbol index of the TOC |
| 4913 | symbol. */ |
| 4914 | if (isym.n_sclass == C_HIDEXT |
| 4915 | && aux.x_csect.x_smclas == XMC_TC |
| 4916 | && *sym_hash != NULL) |
| 4917 | { |
| 4918 | BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0); |
| 4919 | BFD_ASSERT ((*sym_hash)->toc_section != NULL); |
| 4920 | (*sym_hash)->u.toc_indx = output_index; |
| 4921 | } |
| 4922 | |
| 4923 | output_index += add; |
| 4924 | outsym += add * osymesz; |
| 4925 | } |
| 4926 | |
| 4927 | esym += add * isymesz; |
| 4928 | isymp += add; |
| 4929 | csectpp += add; |
| 4930 | sym_hash += add; |
| 4931 | if (debug_index != NULL) |
| 4932 | debug_index += add; |
| 4933 | ++indexp; |
| 4934 | for (--add; add > 0; --add) |
| 4935 | *indexp++ = -1; |
| 4936 | } |
| 4937 | |
| 4938 | /* Fix up the aux entries and the C_BSTAT symbols. This must be |
| 4939 | done in a separate pass, because we don't know the correct symbol |
| 4940 | indices until we have already decided which symbols we are going |
| 4941 | to keep. */ |
| 4942 | |
| 4943 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| 4944 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| 4945 | isymp = finfo->internal_syms; |
| 4946 | indexp = finfo->sym_indices; |
| 4947 | csectpp = xcoff_data (input_bfd)->csects; |
| 4948 | outsym = finfo->outsyms; |
| 4949 | while (esym < esym_end) |
| 4950 | { |
| 4951 | int add; |
| 4952 | |
| 4953 | add = 1 + isymp->n_numaux; |
| 4954 | |
| 4955 | if (*indexp < 0) |
| 4956 | esym += add * isymesz; |
| 4957 | else |
| 4958 | { |
| 4959 | int i; |
| 4960 | |
| 4961 | if (isymp->n_sclass == C_BSTAT) |
| 4962 | { |
| 4963 | struct internal_syment isym; |
| 4964 | unsigned long indx; |
| 4965 | |
| 4966 | /* The value of a C_BSTAT symbol is the symbol table |
| 4967 | index of the containing csect. */ |
| 4968 | bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym); |
| 4969 | indx = isym.n_value; |
| 4970 | if (indx < obj_raw_syment_count (input_bfd)) |
| 4971 | { |
| 4972 | long symindx; |
| 4973 | |
| 4974 | symindx = finfo->sym_indices[indx]; |
| 4975 | if (symindx < 0) |
| 4976 | isym.n_value = 0; |
| 4977 | else |
| 4978 | isym.n_value = symindx; |
| 4979 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, |
| 4980 | (PTR) outsym); |
| 4981 | } |
| 4982 | } |
| 4983 | |
| 4984 | esym += isymesz; |
| 4985 | outsym += osymesz; |
| 4986 | |
| 4987 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) |
| 4988 | { |
| 4989 | union internal_auxent aux; |
| 4990 | |
| 4991 | bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, |
| 4992 | isymp->n_sclass, i, isymp->n_numaux, |
| 4993 | (PTR) &aux); |
| 4994 | |
| 4995 | if (isymp->n_sclass == C_FILE) |
| 4996 | { |
| 4997 | /* This is the file name (or some comment put in by |
| 4998 | the compiler). If it is long, we must put it in |
| 4999 | the string table. */ |
| 5000 | if (aux.x_file.x_n.x_zeroes == 0 |
| 5001 | && aux.x_file.x_n.x_offset != 0) |
| 5002 | { |
| 5003 | const char *filename; |
| 5004 | bfd_size_type indx; |
| 5005 | |
| 5006 | BFD_ASSERT (aux.x_file.x_n.x_offset |
| 5007 | >= STRING_SIZE_SIZE); |
| 5008 | if (strings == NULL) |
| 5009 | { |
| 5010 | strings = _bfd_coff_read_string_table (input_bfd); |
| 5011 | if (strings == NULL) |
| 5012 | return false; |
| 5013 | } |
| 5014 | filename = strings + aux.x_file.x_n.x_offset; |
| 5015 | indx = _bfd_stringtab_add (finfo->strtab, filename, |
| 5016 | hash, copy); |
| 5017 | if (indx == (bfd_size_type) -1) |
| 5018 | return false; |
| 5019 | aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; |
| 5020 | } |
| 5021 | } |
| 5022 | else if ((isymp->n_sclass == C_EXT |
| 5023 | || isymp->n_sclass == C_HIDEXT) |
| 5024 | && i + 1 == isymp->n_numaux) |
| 5025 | { |
| 5026 | /* We don't support type checking. I don't know if |
| 5027 | anybody does. */ |
| 5028 | aux.x_csect.x_parmhash = 0; |
| 5029 | /* I don't think anybody uses these fields, but we'd |
| 5030 | better clobber them just in case. */ |
| 5031 | aux.x_csect.x_stab = 0; |
| 5032 | aux.x_csect.x_snstab = 0; |
| 5033 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD) |
| 5034 | { |
| 5035 | unsigned long indx; |
| 5036 | |
| 5037 | indx = aux.x_csect.x_scnlen.l; |
| 5038 | if (indx < obj_raw_syment_count (input_bfd)) |
| 5039 | { |
| 5040 | long symindx; |
| 5041 | |
| 5042 | symindx = finfo->sym_indices[indx]; |
| 5043 | if (symindx < 0) |
| 5044 | aux.x_sym.x_tagndx.l = 0; |
| 5045 | else |
| 5046 | aux.x_sym.x_tagndx.l = symindx; |
| 5047 | } |
| 5048 | } |
| 5049 | } |
| 5050 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) |
| 5051 | { |
| 5052 | unsigned long indx; |
| 5053 | |
| 5054 | if (ISFCN (isymp->n_type) |
| 5055 | || ISTAG (isymp->n_sclass) |
| 5056 | || isymp->n_sclass == C_BLOCK |
| 5057 | || isymp->n_sclass == C_FCN) |
| 5058 | { |
| 5059 | indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 5060 | if (indx > 0 |
| 5061 | && indx < obj_raw_syment_count (input_bfd)) |
| 5062 | { |
| 5063 | /* We look forward through the symbol for |
| 5064 | the index of the next symbol we are going |
| 5065 | to include. I don't know if this is |
| 5066 | entirely right. */ |
| 5067 | while (finfo->sym_indices[indx] < 0 |
| 5068 | && indx < obj_raw_syment_count (input_bfd)) |
| 5069 | ++indx; |
| 5070 | if (indx >= obj_raw_syment_count (input_bfd)) |
| 5071 | indx = output_index; |
| 5072 | else |
| 5073 | indx = finfo->sym_indices[indx]; |
| 5074 | aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx; |
| 5075 | } |
| 5076 | } |
| 5077 | |
| 5078 | indx = aux.x_sym.x_tagndx.l; |
| 5079 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) |
| 5080 | { |
| 5081 | long symindx; |
| 5082 | |
| 5083 | symindx = finfo->sym_indices[indx]; |
| 5084 | if (symindx < 0) |
| 5085 | aux.x_sym.x_tagndx.l = 0; |
| 5086 | else |
| 5087 | aux.x_sym.x_tagndx.l = symindx; |
| 5088 | } |
| 5089 | } |
| 5090 | |
| 5091 | /* Copy over the line numbers, unless we are stripping |
| 5092 | them. We do this on a symbol by symbol basis in |
| 5093 | order to more easily handle garbage collection. */ |
| 5094 | if ((isymp->n_sclass == C_EXT |
| 5095 | || isymp->n_sclass == C_HIDEXT) |
| 5096 | && i == 0 |
| 5097 | && isymp->n_numaux > 1 |
| 5098 | && ISFCN (isymp->n_type) |
| 5099 | && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| 5100 | { |
| 5101 | if (finfo->info->strip != strip_none |
| 5102 | && finfo->info->strip != strip_some) |
| 5103 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; |
| 5104 | else |
| 5105 | { |
| 5106 | asection *enclosing; |
| 5107 | unsigned int enc_count; |
| 5108 | bfd_size_type linoff; |
| 5109 | struct internal_lineno lin; |
| 5110 | |
| 5111 | o = *csectpp; |
| 5112 | enclosing = xcoff_section_data (abfd, o)->enclosing; |
| 5113 | enc_count = xcoff_section_data (abfd, o)->lineno_count; |
| 5114 | if (oline != enclosing) |
| 5115 | { |
| 5116 | if (bfd_seek (input_bfd, |
| 5117 | enclosing->line_filepos, |
| 5118 | SEEK_SET) != 0 |
| 5119 | || (bfd_read (finfo->linenos, linesz, |
| 5120 | enc_count, input_bfd) |
| 5121 | != linesz * enc_count)) |
| 5122 | return false; |
| 5123 | oline = enclosing; |
| 5124 | } |
| 5125 | |
| 5126 | linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| 5127 | - enclosing->line_filepos); |
| 5128 | |
| 5129 | bfd_coff_swap_lineno_in (input_bfd, |
| 5130 | (PTR) (finfo->linenos + linoff), |
| 5131 | (PTR) &lin); |
| 5132 | if (lin.l_lnno != 0 |
| 5133 | || ((bfd_size_type) lin.l_addr.l_symndx |
| 5134 | != ((esym |
| 5135 | - isymesz |
| 5136 | - ((bfd_byte *) |
| 5137 | obj_coff_external_syms (input_bfd))) |
| 5138 | / isymesz))) |
| 5139 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; |
| 5140 | else |
| 5141 | { |
| 5142 | bfd_byte *linpend, *linp; |
| 5143 | bfd_vma offset; |
| 5144 | bfd_size_type count; |
| 5145 | |
| 5146 | lin.l_addr.l_symndx = *indexp; |
| 5147 | bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin, |
| 5148 | (PTR) (finfo->linenos |
| 5149 | + linoff)); |
| 5150 | |
| 5151 | linpend = (finfo->linenos |
| 5152 | + enc_count * linesz); |
| 5153 | offset = (o->output_section->vma |
| 5154 | + o->output_offset |
| 5155 | - o->vma); |
| 5156 | for (linp = finfo->linenos + linoff + linesz; |
| 5157 | linp < linpend; |
| 5158 | linp += linesz) |
| 5159 | { |
| 5160 | bfd_coff_swap_lineno_in (input_bfd, (PTR) linp, |
| 5161 | (PTR) &lin); |
| 5162 | if (lin.l_lnno == 0) |
| 5163 | break; |
| 5164 | lin.l_addr.l_paddr += offset; |
| 5165 | bfd_coff_swap_lineno_out (output_bfd, |
| 5166 | (PTR) &lin, |
| 5167 | (PTR) linp); |
| 5168 | } |
| 5169 | |
| 5170 | count = (linp - (finfo->linenos + linoff)) / linesz; |
| 5171 | |
| 5172 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = |
| 5173 | (o->output_section->line_filepos |
| 5174 | + o->output_section->lineno_count * linesz); |
| 5175 | |
| 5176 | if (bfd_seek (output_bfd, |
| 5177 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr, |
| 5178 | SEEK_SET) != 0 |
| 5179 | || (bfd_write (finfo->linenos + linoff, |
| 5180 | linesz, count, output_bfd) |
| 5181 | != linesz * count)) |
| 5182 | return false; |
| 5183 | |
| 5184 | o->output_section->lineno_count += count; |
| 5185 | |
| 5186 | if (incls > 0) |
| 5187 | { |
| 5188 | struct internal_syment *iisp, *iispend; |
| 5189 | long *iindp; |
| 5190 | bfd_byte *oos; |
| 5191 | int iiadd; |
| 5192 | |
| 5193 | /* Update any C_BINCL or C_EINCL symbols |
| 5194 | that refer to a line number in the |
| 5195 | range we just output. */ |
| 5196 | iisp = finfo->internal_syms; |
| 5197 | iispend = (iisp |
| 5198 | + obj_raw_syment_count (input_bfd)); |
| 5199 | iindp = finfo->sym_indices; |
| 5200 | oos = finfo->outsyms; |
| 5201 | while (iisp < iispend) |
| 5202 | { |
| 5203 | if (*iindp >= 0 |
| 5204 | && (iisp->n_sclass == C_BINCL |
| 5205 | || iisp->n_sclass == C_EINCL) |
| 5206 | && ((bfd_size_type) iisp->n_value |
| 5207 | >= enclosing->line_filepos + linoff) |
| 5208 | && ((bfd_size_type) iisp->n_value |
| 5209 | < (enclosing->line_filepos |
| 5210 | + enc_count * linesz))) |
| 5211 | { |
| 5212 | struct internal_syment iis; |
| 5213 | |
| 5214 | bfd_coff_swap_sym_in (output_bfd, |
| 5215 | (PTR) oos, |
| 5216 | (PTR) &iis); |
| 5217 | iis.n_value = |
| 5218 | (iisp->n_value |
| 5219 | - enclosing->line_filepos |
| 5220 | - linoff |
| 5221 | + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr); |
| 5222 | bfd_coff_swap_sym_out (output_bfd, |
| 5223 | (PTR) &iis, |
| 5224 | (PTR) oos); |
| 5225 | --incls; |
| 5226 | } |
| 5227 | |
| 5228 | iiadd = 1 + iisp->n_numaux; |
| 5229 | if (*iindp >= 0) |
| 5230 | oos += iiadd * osymesz; |
| 5231 | iisp += iiadd; |
| 5232 | iindp += iiadd; |
| 5233 | } |
| 5234 | } |
| 5235 | } |
| 5236 | } |
| 5237 | } |
| 5238 | |
| 5239 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type, |
| 5240 | isymp->n_sclass, i, isymp->n_numaux, |
| 5241 | (PTR) outsym); |
| 5242 | outsym += osymesz; |
| 5243 | esym += isymesz; |
| 5244 | } |
| 5245 | } |
| 5246 | |
| 5247 | indexp += add; |
| 5248 | isymp += add; |
| 5249 | csectpp += add; |
| 5250 | } |
| 5251 | |
| 5252 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE |
| 5253 | symbol will be the first symbol in the next input file. In the |
| 5254 | normal case, this will save us from writing out the C_FILE symbol |
| 5255 | again. */ |
| 5256 | if (finfo->last_file_index != -1 |
| 5257 | && (bfd_size_type) finfo->last_file_index >= syment_base) |
| 5258 | { |
| 5259 | finfo->last_file.n_value = output_index; |
| 5260 | bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, |
| 5261 | (PTR) (finfo->outsyms |
| 5262 | + ((finfo->last_file_index - syment_base) |
| 5263 | * osymesz))); |
| 5264 | } |
| 5265 | |
| 5266 | /* Write the modified symbols to the output file. */ |
| 5267 | if (outsym > finfo->outsyms) |
| 5268 | { |
| 5269 | if (bfd_seek (output_bfd, |
| 5270 | obj_sym_filepos (output_bfd) + syment_base * osymesz, |
| 5271 | SEEK_SET) != 0 |
| 5272 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, |
| 5273 | output_bfd) |
| 5274 | != (bfd_size_type) (outsym - finfo->outsyms))) |
| 5275 | return false; |
| 5276 | |
| 5277 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) |
| 5278 | + (outsym - finfo->outsyms) / osymesz) |
| 5279 | == output_index); |
| 5280 | |
| 5281 | obj_raw_syment_count (output_bfd) = output_index; |
| 5282 | } |
| 5283 | |
| 5284 | /* Don't let the linker relocation routines discard the symbols. */ |
| 5285 | keep_syms = obj_coff_keep_syms (input_bfd); |
| 5286 | obj_coff_keep_syms (input_bfd) = true; |
| 5287 | |
| 5288 | /* Relocate the contents of each section. */ |
| 5289 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 5290 | { |
| 5291 | bfd_byte *contents; |
| 5292 | |
| 5293 | if (! o->linker_mark) |
| 5294 | { |
| 5295 | /* This section was omitted from the link. */ |
| 5296 | continue; |
| 5297 | } |
| 5298 | |
| 5299 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
| 5300 | || o->_raw_size == 0 |
| 5301 | || (o->flags & SEC_IN_MEMORY) != 0) |
| 5302 | continue; |
| 5303 | |
| 5304 | /* We have set filepos correctly for the sections we created to |
| 5305 | represent csects, so bfd_get_section_contents should work. */ |
| 5306 | if (coff_section_data (input_bfd, o) != NULL |
| 5307 | && coff_section_data (input_bfd, o)->contents != NULL) |
| 5308 | contents = coff_section_data (input_bfd, o)->contents; |
| 5309 | else |
| 5310 | { |
| 5311 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, |
| 5312 | (file_ptr) 0, o->_raw_size)) |
| 5313 | return false; |
| 5314 | contents = finfo->contents; |
| 5315 | } |
| 5316 | |
| 5317 | if ((o->flags & SEC_RELOC) != 0) |
| 5318 | { |
| 5319 | int target_index; |
| 5320 | struct internal_reloc *internal_relocs; |
| 5321 | struct internal_reloc *irel; |
| 5322 | bfd_vma offset; |
| 5323 | struct internal_reloc *irelend; |
| 5324 | struct xcoff_link_hash_entry **rel_hash; |
| 5325 | long r_symndx; |
| 5326 | |
| 5327 | /* Read in the relocs. */ |
| 5328 | target_index = o->output_section->target_index; |
| 5329 | internal_relocs = (xcoff_read_internal_relocs |
| 5330 | (input_bfd, o, false, finfo->external_relocs, |
| 5331 | true, |
| 5332 | (finfo->section_info[target_index].relocs |
| 5333 | + o->output_section->reloc_count))); |
| 5334 | if (internal_relocs == NULL) |
| 5335 | return false; |
| 5336 | |
| 5337 | /* Call processor specific code to relocate the section |
| 5338 | contents. */ |
| 5339 | if (! bfd_coff_relocate_section (output_bfd, finfo->info, |
| 5340 | input_bfd, o, |
| 5341 | contents, |
| 5342 | internal_relocs, |
| 5343 | finfo->internal_syms, |
| 5344 | xcoff_data (input_bfd)->csects)) |
| 5345 | return false; |
| 5346 | |
| 5347 | offset = o->output_section->vma + o->output_offset - o->vma; |
| 5348 | irel = internal_relocs; |
| 5349 | irelend = irel + o->reloc_count; |
| 5350 | rel_hash = (finfo->section_info[target_index].rel_hashes |
| 5351 | + o->output_section->reloc_count); |
| 5352 | for (; irel < irelend; irel++, rel_hash++) |
| 5353 | { |
| 5354 | struct xcoff_link_hash_entry *h = NULL; |
| 5355 | struct internal_ldrel ldrel; |
| 5356 | boolean quiet; |
| 5357 | |
| 5358 | *rel_hash = NULL; |
| 5359 | |
| 5360 | /* Adjust the reloc address and symbol index. */ |
| 5361 | |
| 5362 | irel->r_vaddr += offset; |
| 5363 | |
| 5364 | r_symndx = irel->r_symndx; |
| 5365 | |
| 5366 | if (r_symndx == -1) |
| 5367 | h = NULL; |
| 5368 | else |
| 5369 | h = obj_xcoff_sym_hashes (input_bfd)[r_symndx]; |
| 5370 | |
| 5371 | if (r_symndx != -1 && finfo->info->strip != strip_all) |
| 5372 | { |
| 5373 | if (h != NULL |
| 5374 | && h->smclas != XMC_TD |
| 5375 | && (irel->r_type == R_TOC |
| 5376 | || irel->r_type == R_GL |
| 5377 | || irel->r_type == R_TCL |
| 5378 | || irel->r_type == R_TRL |
| 5379 | || irel->r_type == R_TRLA)) |
| 5380 | { |
| 5381 | /* This is a TOC relative reloc with a symbol |
| 5382 | attached. The symbol should be the one which |
| 5383 | this reloc is for. We want to make this |
| 5384 | reloc against the TOC address of the symbol, |
| 5385 | not the symbol itself. */ |
| 5386 | BFD_ASSERT (h->toc_section != NULL); |
| 5387 | BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); |
| 5388 | if (h->u.toc_indx != -1) |
| 5389 | irel->r_symndx = h->u.toc_indx; |
| 5390 | else |
| 5391 | { |
| 5392 | struct xcoff_toc_rel_hash *n; |
| 5393 | struct xcoff_link_section_info *si; |
| 5394 | |
| 5395 | n = ((struct xcoff_toc_rel_hash *) |
| 5396 | bfd_alloc (finfo->output_bfd, |
| 5397 | sizeof (struct xcoff_toc_rel_hash))); |
| 5398 | if (n == NULL) |
| 5399 | return false; |
| 5400 | si = finfo->section_info + target_index; |
| 5401 | n->next = si->toc_rel_hashes; |
| 5402 | n->h = h; |
| 5403 | n->rel = irel; |
| 5404 | si->toc_rel_hashes = n; |
| 5405 | } |
| 5406 | } |
| 5407 | else if (h != NULL) |
| 5408 | { |
| 5409 | /* This is a global symbol. */ |
| 5410 | if (h->indx >= 0) |
| 5411 | irel->r_symndx = h->indx; |
| 5412 | else |
| 5413 | { |
| 5414 | /* This symbol is being written at the end |
| 5415 | of the file, and we do not yet know the |
| 5416 | symbol index. We save the pointer to the |
| 5417 | hash table entry in the rel_hash list. |
| 5418 | We set the indx field to -2 to indicate |
| 5419 | that this symbol must not be stripped. */ |
| 5420 | *rel_hash = h; |
| 5421 | h->indx = -2; |
| 5422 | } |
| 5423 | } |
| 5424 | else |
| 5425 | { |
| 5426 | long indx; |
| 5427 | |
| 5428 | indx = finfo->sym_indices[r_symndx]; |
| 5429 | |
| 5430 | if (indx == -1) |
| 5431 | { |
| 5432 | struct internal_syment *is; |
| 5433 | |
| 5434 | /* Relocations against a TC0 TOC anchor are |
| 5435 | automatically transformed to be against |
| 5436 | the TOC anchor in the output file. */ |
| 5437 | is = finfo->internal_syms + r_symndx; |
| 5438 | if (is->n_sclass == C_HIDEXT |
| 5439 | && is->n_numaux > 0) |
| 5440 | { |
| 5441 | PTR auxptr; |
| 5442 | union internal_auxent aux; |
| 5443 | |
| 5444 | auxptr = ((PTR) |
| 5445 | (((bfd_byte *) |
| 5446 | obj_coff_external_syms (input_bfd)) |
| 5447 | + ((r_symndx + is->n_numaux) |
| 5448 | * isymesz))); |
| 5449 | bfd_coff_swap_aux_in (input_bfd, auxptr, |
| 5450 | is->n_type, is->n_sclass, |
| 5451 | is->n_numaux - 1, |
| 5452 | is->n_numaux, |
| 5453 | (PTR) &aux); |
| 5454 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD |
| 5455 | && aux.x_csect.x_smclas == XMC_TC0) |
| 5456 | indx = finfo->toc_symindx; |
| 5457 | } |
| 5458 | } |
| 5459 | |
| 5460 | if (indx != -1) |
| 5461 | irel->r_symndx = indx; |
| 5462 | else |
| 5463 | { |
| 5464 | struct internal_syment *is; |
| 5465 | const char *name; |
| 5466 | char buf[SYMNMLEN + 1]; |
| 5467 | |
| 5468 | /* This reloc is against a symbol we are |
| 5469 | stripping. It would be possible to handle |
| 5470 | this case, but I don't think it's worth it. */ |
| 5471 | is = finfo->internal_syms + r_symndx; |
| 5472 | |
| 5473 | name = (_bfd_coff_internal_syment_name |
| 5474 | (input_bfd, is, buf)); |
| 5475 | if (name == NULL) |
| 5476 | return false; |
| 5477 | |
| 5478 | if (! ((*finfo->info->callbacks->unattached_reloc) |
| 5479 | (finfo->info, name, input_bfd, o, |
| 5480 | irel->r_vaddr))) |
| 5481 | return false; |
| 5482 | } |
| 5483 | } |
| 5484 | } |
| 5485 | |
| 5486 | quiet = false; |
| 5487 | switch (irel->r_type) |
| 5488 | { |
| 5489 | default: |
| 5490 | if (h == NULL |
| 5491 | || h->root.type == bfd_link_hash_defined |
| 5492 | || h->root.type == bfd_link_hash_defweak |
| 5493 | || h->root.type == bfd_link_hash_common) |
| 5494 | break; |
| 5495 | /* Fall through. */ |
| 5496 | case R_POS: |
| 5497 | case R_NEG: |
| 5498 | case R_RL: |
| 5499 | case R_RLA: |
| 5500 | /* This reloc needs to be copied into the .loader |
| 5501 | section. */ |
| 5502 | ldrel.l_vaddr = irel->r_vaddr; |
| 5503 | if (r_symndx == -1) |
| 5504 | ldrel.l_symndx = -1; |
| 5505 | else if (h == NULL |
| 5506 | || (h->root.type == bfd_link_hash_defined |
| 5507 | || h->root.type == bfd_link_hash_defweak |
| 5508 | || h->root.type == bfd_link_hash_common)) |
| 5509 | { |
| 5510 | asection *sec; |
| 5511 | |
| 5512 | if (h == NULL) |
| 5513 | sec = xcoff_data (input_bfd)->csects[r_symndx]; |
| 5514 | else if (h->root.type == bfd_link_hash_common) |
| 5515 | sec = h->root.u.c.p->section; |
| 5516 | else |
| 5517 | sec = h->root.u.def.section; |
| 5518 | sec = sec->output_section; |
| 5519 | |
| 5520 | if (strcmp (sec->name, ".text") == 0) |
| 5521 | ldrel.l_symndx = 0; |
| 5522 | else if (strcmp (sec->name, ".data") == 0) |
| 5523 | ldrel.l_symndx = 1; |
| 5524 | else if (strcmp (sec->name, ".bss") == 0) |
| 5525 | ldrel.l_symndx = 2; |
| 5526 | else |
| 5527 | { |
| 5528 | (*_bfd_error_handler) |
| 5529 | (_("%s: loader reloc in unrecognized section `%s'"), |
| 5530 | bfd_get_filename (input_bfd), |
| 5531 | sec->name); |
| 5532 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 5533 | return false; |
| 5534 | } |
| 5535 | } |
| 5536 | else |
| 5537 | { |
| 5538 | if (! finfo->info->relocateable |
| 5539 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| 5540 | && (h->flags & XCOFF_IMPORT) == 0) |
| 5541 | { |
| 5542 | /* We already called the undefined_symbol |
| 5543 | callback for this relocation, in |
| 5544 | _bfd_ppc_xcoff_relocate_section. Don't |
| 5545 | issue any more warnings. */ |
| 5546 | quiet = true; |
| 5547 | } |
| 5548 | if (h->ldindx < 0 && ! quiet) |
| 5549 | { |
| 5550 | (*_bfd_error_handler) |
| 5551 | (_("%s: `%s' in loader reloc but not loader sym"), |
| 5552 | bfd_get_filename (input_bfd), |
| 5553 | h->root.root.string); |
| 5554 | bfd_set_error (bfd_error_bad_value); |
| 5555 | return false; |
| 5556 | } |
| 5557 | ldrel.l_symndx = h->ldindx; |
| 5558 | } |
| 5559 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
| 5560 | ldrel.l_rsecnm = o->output_section->target_index; |
| 5561 | if (xcoff_hash_table (finfo->info)->textro |
| 5562 | && strcmp (o->output_section->name, ".text") == 0 |
| 5563 | && ! quiet) |
| 5564 | { |
| 5565 | (*_bfd_error_handler) |
| 5566 | (_("%s: loader reloc in read-only section %s"), |
| 5567 | bfd_get_filename (input_bfd), |
| 5568 | bfd_get_section_name (finfo->output_bfd, |
| 5569 | o->output_section)); |
| 5570 | bfd_set_error (bfd_error_invalid_operation); |
| 5571 | return false; |
| 5572 | } |
| 5573 | xcoff_swap_ldrel_out (output_bfd, &ldrel, |
| 5574 | finfo->ldrel); |
| 5575 | BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ); |
| 5576 | ++finfo->ldrel; |
| 5577 | break; |
| 5578 | |
| 5579 | case R_TOC: |
| 5580 | case R_GL: |
| 5581 | case R_TCL: |
| 5582 | case R_TRL: |
| 5583 | case R_TRLA: |
| 5584 | /* We should never need a .loader reloc for a TOC |
| 5585 | relative reloc. */ |
| 5586 | break; |
| 5587 | } |
| 5588 | } |
| 5589 | |
| 5590 | o->output_section->reloc_count += o->reloc_count; |
| 5591 | } |
| 5592 | |
| 5593 | /* Write out the modified section contents. */ |
| 5594 | if (! bfd_set_section_contents (output_bfd, o->output_section, |
| 5595 | contents, o->output_offset, |
| 5596 | (o->_cooked_size != 0 |
| 5597 | ? o->_cooked_size |
| 5598 | : o->_raw_size))) |
| 5599 | return false; |
| 5600 | } |
| 5601 | |
| 5602 | obj_coff_keep_syms (input_bfd) = keep_syms; |
| 5603 | |
| 5604 | if (! finfo->info->keep_memory) |
| 5605 | { |
| 5606 | if (! _bfd_coff_free_symbols (input_bfd)) |
| 5607 | return false; |
| 5608 | } |
| 5609 | |
| 5610 | return true; |
| 5611 | } |
| 5612 | |
| 5613 | #undef N_TMASK |
| 5614 | #undef N_BTSHFT |
| 5615 | |
| 5616 | /* Write out a non-XCOFF global symbol. */ |
| 5617 | |
| 5618 | static boolean |
| 5619 | xcoff_write_global_symbol (h, p) |
| 5620 | struct xcoff_link_hash_entry *h; |
| 5621 | PTR p; |
| 5622 | { |
| 5623 | struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p; |
| 5624 | bfd *output_bfd; |
| 5625 | bfd_byte *outsym; |
| 5626 | struct internal_syment isym; |
| 5627 | union internal_auxent aux; |
| 5628 | |
| 5629 | output_bfd = finfo->output_bfd; |
| 5630 | outsym = finfo->outsyms; |
| 5631 | |
| 5632 | /* If this symbol was garbage collected, just skip it. */ |
| 5633 | if (xcoff_hash_table (finfo->info)->gc |
| 5634 | && (h->flags & XCOFF_MARK) == 0) |
| 5635 | return true; |
| 5636 | |
| 5637 | /* If we need a .loader section entry, write it out. */ |
| 5638 | if (h->ldsym != NULL) |
| 5639 | { |
| 5640 | struct internal_ldsym *ldsym; |
| 5641 | bfd *impbfd; |
| 5642 | |
| 5643 | ldsym = h->ldsym; |
| 5644 | |
| 5645 | if (h->root.type == bfd_link_hash_undefined |
| 5646 | || h->root.type == bfd_link_hash_undefweak) |
| 5647 | { |
| 5648 | ldsym->l_value = 0; |
| 5649 | ldsym->l_scnum = N_UNDEF; |
| 5650 | ldsym->l_smtype = XTY_ER; |
| 5651 | impbfd = h->root.u.undef.abfd; |
| 5652 | } |
| 5653 | else if (h->root.type == bfd_link_hash_defined |
| 5654 | || h->root.type == bfd_link_hash_defweak) |
| 5655 | { |
| 5656 | asection *sec; |
| 5657 | |
| 5658 | sec = h->root.u.def.section; |
| 5659 | ldsym->l_value = (sec->output_section->vma |
| 5660 | + sec->output_offset |
| 5661 | + h->root.u.def.value); |
| 5662 | ldsym->l_scnum = sec->output_section->target_index; |
| 5663 | ldsym->l_smtype = XTY_SD; |
| 5664 | impbfd = sec->owner; |
| 5665 | } |
| 5666 | else |
| 5667 | abort (); |
| 5668 | |
| 5669 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| 5670 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 5671 | || (h->flags & XCOFF_IMPORT) != 0) |
| 5672 | ldsym->l_smtype |= L_IMPORT; |
| 5673 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| 5674 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| 5675 | || (h->flags & XCOFF_EXPORT) != 0) |
| 5676 | ldsym->l_smtype |= L_EXPORT; |
| 5677 | if ((h->flags & XCOFF_ENTRY) != 0) |
| 5678 | ldsym->l_smtype |= L_ENTRY; |
| 5679 | |
| 5680 | ldsym->l_smclas = h->smclas; |
| 5681 | |
| 5682 | if (ldsym->l_ifile == (bfd_size_type) -1) |
| 5683 | ldsym->l_ifile = 0; |
| 5684 | else if (ldsym->l_ifile == 0) |
| 5685 | { |
| 5686 | if ((ldsym->l_smtype & L_IMPORT) == 0) |
| 5687 | ldsym->l_ifile = 0; |
| 5688 | else if (impbfd == NULL) |
| 5689 | ldsym->l_ifile = 0; |
| 5690 | else |
| 5691 | { |
| 5692 | BFD_ASSERT (impbfd->xvec == output_bfd->xvec); |
| 5693 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| 5694 | } |
| 5695 | } |
| 5696 | |
| 5697 | ldsym->l_parm = 0; |
| 5698 | |
| 5699 | BFD_ASSERT (h->ldindx >= 0); |
| 5700 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); |
| 5701 | xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3); |
| 5702 | h->ldsym = NULL; |
| 5703 | } |
| 5704 | |
| 5705 | /* If this symbol needs global linkage code, write it out. */ |
| 5706 | if (h->root.type == bfd_link_hash_defined |
| 5707 | && (h->root.u.def.section |
| 5708 | == xcoff_hash_table (finfo->info)->linkage_section)) |
| 5709 | { |
| 5710 | bfd_byte *p; |
| 5711 | bfd_vma tocoff; |
| 5712 | unsigned int i; |
| 5713 | |
| 5714 | p = h->root.u.def.section->contents + h->root.u.def.value; |
| 5715 | |
| 5716 | /* The first instruction in the global linkage code loads a |
| 5717 | specific TOC element. */ |
| 5718 | tocoff = (h->descriptor->toc_section->output_section->vma |
| 5719 | + h->descriptor->toc_section->output_offset |
| 5720 | - xcoff_data (output_bfd)->toc); |
| 5721 | if ((h->descriptor->flags & XCOFF_SET_TOC) != 0) |
| 5722 | tocoff += h->descriptor->u.toc_offset; |
| 5723 | bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p); |
| 5724 | for (i = 0, p += 4; |
| 5725 | i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]; |
| 5726 | i++, p += 4) |
| 5727 | bfd_put_32 (output_bfd, xcoff_glink_code[i], p); |
| 5728 | } |
| 5729 | |
| 5730 | /* If we created a TOC entry for this symbol, write out the required |
| 5731 | relocs. */ |
| 5732 | if ((h->flags & XCOFF_SET_TOC) != 0) |
| 5733 | { |
| 5734 | asection *tocsec; |
| 5735 | asection *osec; |
| 5736 | int oindx; |
| 5737 | struct internal_reloc *irel; |
| 5738 | struct internal_ldrel ldrel; |
| 5739 | struct internal_syment irsym; |
| 5740 | union internal_auxent iraux; |
| 5741 | |
| 5742 | tocsec = h->toc_section; |
| 5743 | osec = tocsec->output_section; |
| 5744 | oindx = osec->target_index; |
| 5745 | irel = finfo->section_info[oindx].relocs + osec->reloc_count; |
| 5746 | irel->r_vaddr = (osec->vma |
| 5747 | + tocsec->output_offset |
| 5748 | + h->u.toc_offset); |
| 5749 | if (h->indx >= 0) |
| 5750 | irel->r_symndx = h->indx; |
| 5751 | else |
| 5752 | { |
| 5753 | h->indx = -2; |
| 5754 | irel->r_symndx = obj_raw_syment_count (output_bfd); |
| 5755 | } |
| 5756 | irel->r_type = R_POS; |
| 5757 | irel->r_size = 31; |
| 5758 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5759 | ++osec->reloc_count; |
| 5760 | |
| 5761 | BFD_ASSERT (h->ldindx >= 0); |
| 5762 | ldrel.l_vaddr = irel->r_vaddr; |
| 5763 | ldrel.l_symndx = h->ldindx; |
| 5764 | ldrel.l_rtype = (31 << 8) | R_POS; |
| 5765 | ldrel.l_rsecnm = oindx; |
| 5766 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| 5767 | ++finfo->ldrel; |
| 5768 | |
| 5769 | /* We need to emit a symbol to define a csect which holds the |
| 5770 | reloc. */ |
| 5771 | if (finfo->info->strip != strip_all) |
| 5772 | { |
| 5773 | if (strlen (h->root.root.string) <= SYMNMLEN) |
| 5774 | strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN); |
| 5775 | else |
| 5776 | { |
| 5777 | boolean hash; |
| 5778 | bfd_size_type indx; |
| 5779 | |
| 5780 | hash = true; |
| 5781 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 5782 | hash = false; |
| 5783 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, |
| 5784 | hash, false); |
| 5785 | if (indx == (bfd_size_type) -1) |
| 5786 | return false; |
| 5787 | irsym._n._n_n._n_zeroes = 0; |
| 5788 | irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 5789 | } |
| 5790 | |
| 5791 | irsym.n_value = irel->r_vaddr; |
| 5792 | irsym.n_scnum = osec->target_index; |
| 5793 | irsym.n_sclass = C_HIDEXT; |
| 5794 | irsym.n_type = T_NULL; |
| 5795 | irsym.n_numaux = 1; |
| 5796 | |
| 5797 | bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym); |
| 5798 | outsym += bfd_coff_symesz (output_bfd); |
| 5799 | |
| 5800 | memset (&iraux, 0, sizeof iraux); |
| 5801 | iraux.x_csect.x_smtyp = XTY_SD; |
| 5802 | iraux.x_csect.x_scnlen.l = 4; |
| 5803 | iraux.x_csect.x_smclas = XMC_TC; |
| 5804 | |
| 5805 | bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT, |
| 5806 | 0, 1, (PTR) outsym); |
| 5807 | outsym += bfd_coff_auxesz (output_bfd); |
| 5808 | |
| 5809 | if (h->indx >= 0) |
| 5810 | { |
| 5811 | /* We aren't going to write out the symbols below, so we |
| 5812 | need to write them out now. */ |
| 5813 | if (bfd_seek (output_bfd, |
| 5814 | (obj_sym_filepos (output_bfd) |
| 5815 | + (obj_raw_syment_count (output_bfd) |
| 5816 | * bfd_coff_symesz (output_bfd))), |
| 5817 | SEEK_SET) != 0 |
| 5818 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, |
| 5819 | output_bfd) |
| 5820 | != (bfd_size_type) (outsym - finfo->outsyms))) |
| 5821 | return false; |
| 5822 | obj_raw_syment_count (output_bfd) += |
| 5823 | (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); |
| 5824 | |
| 5825 | outsym = finfo->outsyms; |
| 5826 | } |
| 5827 | } |
| 5828 | } |
| 5829 | |
| 5830 | /* If this symbol is a specially defined function descriptor, write |
| 5831 | it out. The first word is the address of the function code |
| 5832 | itself, the second word is the address of the TOC, and the third |
| 5833 | word is zero. */ |
| 5834 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| 5835 | && h->root.type == bfd_link_hash_defined |
| 5836 | && (h->root.u.def.section |
| 5837 | == xcoff_hash_table (finfo->info)->descriptor_section)) |
| 5838 | { |
| 5839 | asection *sec; |
| 5840 | asection *osec; |
| 5841 | int oindx; |
| 5842 | bfd_byte *p; |
| 5843 | struct xcoff_link_hash_entry *hentry; |
| 5844 | asection *esec; |
| 5845 | struct internal_reloc *irel; |
| 5846 | struct internal_ldrel ldrel; |
| 5847 | asection *tsec; |
| 5848 | |
| 5849 | sec = h->root.u.def.section; |
| 5850 | osec = sec->output_section; |
| 5851 | oindx = osec->target_index; |
| 5852 | p = sec->contents + h->root.u.def.value; |
| 5853 | |
| 5854 | hentry = h->descriptor; |
| 5855 | BFD_ASSERT (hentry != NULL |
| 5856 | && (hentry->root.type == bfd_link_hash_defined |
| 5857 | || hentry->root.type == bfd_link_hash_defweak)); |
| 5858 | esec = hentry->root.u.def.section; |
| 5859 | bfd_put_32 (output_bfd, |
| 5860 | (esec->output_section->vma |
| 5861 | + esec->output_offset |
| 5862 | + hentry->root.u.def.value), |
| 5863 | p); |
| 5864 | |
| 5865 | irel = finfo->section_info[oindx].relocs + osec->reloc_count; |
| 5866 | irel->r_vaddr = (osec->vma |
| 5867 | + sec->output_offset |
| 5868 | + h->root.u.def.value); |
| 5869 | irel->r_symndx = esec->output_section->target_index; |
| 5870 | irel->r_type = R_POS; |
| 5871 | irel->r_size = 31; |
| 5872 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5873 | ++osec->reloc_count; |
| 5874 | |
| 5875 | ldrel.l_vaddr = irel->r_vaddr; |
| 5876 | if (strcmp (esec->output_section->name, ".text") == 0) |
| 5877 | ldrel.l_symndx = 0; |
| 5878 | else if (strcmp (esec->output_section->name, ".data") == 0) |
| 5879 | ldrel.l_symndx = 1; |
| 5880 | else if (strcmp (esec->output_section->name, ".bss") == 0) |
| 5881 | ldrel.l_symndx = 2; |
| 5882 | else |
| 5883 | { |
| 5884 | (*_bfd_error_handler) |
| 5885 | (_("%s: loader reloc in unrecognized section `%s'"), |
| 5886 | bfd_get_filename (output_bfd), |
| 5887 | esec->output_section->name); |
| 5888 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 5889 | return false; |
| 5890 | } |
| 5891 | ldrel.l_rtype = (31 << 8) | R_POS; |
| 5892 | ldrel.l_rsecnm = oindx; |
| 5893 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| 5894 | ++finfo->ldrel; |
| 5895 | |
| 5896 | bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4); |
| 5897 | |
| 5898 | tsec = coff_section_from_bfd_index (output_bfd, |
| 5899 | xcoff_data (output_bfd)->sntoc); |
| 5900 | |
| 5901 | ++irel; |
| 5902 | irel->r_vaddr = (osec->vma |
| 5903 | + sec->output_offset |
| 5904 | + h->root.u.def.value |
| 5905 | + 4); |
| 5906 | irel->r_symndx = tsec->output_section->target_index; |
| 5907 | irel->r_type = R_POS; |
| 5908 | irel->r_size = 31; |
| 5909 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| 5910 | ++osec->reloc_count; |
| 5911 | |
| 5912 | ldrel.l_vaddr = irel->r_vaddr; |
| 5913 | if (strcmp (tsec->output_section->name, ".text") == 0) |
| 5914 | ldrel.l_symndx = 0; |
| 5915 | else if (strcmp (tsec->output_section->name, ".data") == 0) |
| 5916 | ldrel.l_symndx = 1; |
| 5917 | else if (strcmp (tsec->output_section->name, ".bss") == 0) |
| 5918 | ldrel.l_symndx = 2; |
| 5919 | else |
| 5920 | { |
| 5921 | (*_bfd_error_handler) |
| 5922 | (_("%s: loader reloc in unrecognized section `%s'"), |
| 5923 | bfd_get_filename (output_bfd), |
| 5924 | tsec->output_section->name); |
| 5925 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 5926 | return false; |
| 5927 | } |
| 5928 | ldrel.l_rtype = (31 << 8) | R_POS; |
| 5929 | ldrel.l_rsecnm = oindx; |
| 5930 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| 5931 | ++finfo->ldrel; |
| 5932 | } |
| 5933 | |
| 5934 | if (h->indx >= 0 || finfo->info->strip == strip_all) |
| 5935 | { |
| 5936 | BFD_ASSERT (outsym == finfo->outsyms); |
| 5937 | return true; |
| 5938 | } |
| 5939 | |
| 5940 | if (h->indx != -2 |
| 5941 | && (finfo->info->strip == strip_all |
| 5942 | || (finfo->info->strip == strip_some |
| 5943 | && (bfd_hash_lookup (finfo->info->keep_hash, |
| 5944 | h->root.root.string, false, false) |
| 5945 | == NULL)))) |
| 5946 | { |
| 5947 | BFD_ASSERT (outsym == finfo->outsyms); |
| 5948 | return true; |
| 5949 | } |
| 5950 | |
| 5951 | if (h->indx != -2 |
| 5952 | && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0) |
| 5953 | { |
| 5954 | BFD_ASSERT (outsym == finfo->outsyms); |
| 5955 | return true; |
| 5956 | } |
| 5957 | |
| 5958 | memset (&aux, 0, sizeof aux); |
| 5959 | |
| 5960 | h->indx = obj_raw_syment_count (output_bfd); |
| 5961 | |
| 5962 | if (strlen (h->root.root.string) <= SYMNMLEN) |
| 5963 | strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); |
| 5964 | else |
| 5965 | { |
| 5966 | boolean hash; |
| 5967 | bfd_size_type indx; |
| 5968 | |
| 5969 | hash = true; |
| 5970 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 5971 | hash = false; |
| 5972 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, |
| 5973 | false); |
| 5974 | if (indx == (bfd_size_type) -1) |
| 5975 | return false; |
| 5976 | isym._n._n_n._n_zeroes = 0; |
| 5977 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| 5978 | } |
| 5979 | |
| 5980 | if (h->root.type == bfd_link_hash_undefined |
| 5981 | || h->root.type == bfd_link_hash_undefweak) |
| 5982 | { |
| 5983 | isym.n_value = 0; |
| 5984 | isym.n_scnum = N_UNDEF; |
| 5985 | isym.n_sclass = C_EXT; |
| 5986 | aux.x_csect.x_smtyp = XTY_ER; |
| 5987 | } |
| 5988 | else if ((h->root.type == bfd_link_hash_defined |
| 5989 | || h->root.type == bfd_link_hash_defweak) |
| 5990 | && h->smclas == XMC_XO) |
| 5991 | { |
| 5992 | BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section)); |
| 5993 | isym.n_value = h->root.u.def.value; |
| 5994 | isym.n_scnum = N_UNDEF; |
| 5995 | isym.n_sclass = C_EXT; |
| 5996 | aux.x_csect.x_smtyp = XTY_ER; |
| 5997 | } |
| 5998 | else if (h->root.type == bfd_link_hash_defined |
| 5999 | || h->root.type == bfd_link_hash_defweak) |
| 6000 | { |
| 6001 | struct xcoff_link_size_list *l; |
| 6002 | |
| 6003 | isym.n_value = (h->root.u.def.section->output_section->vma |
| 6004 | + h->root.u.def.section->output_offset |
| 6005 | + h->root.u.def.value); |
| 6006 | isym.n_scnum = h->root.u.def.section->output_section->target_index; |
| 6007 | isym.n_sclass = C_HIDEXT; |
| 6008 | aux.x_csect.x_smtyp = XTY_SD; |
| 6009 | |
| 6010 | if ((h->flags & XCOFF_HAS_SIZE) != 0) |
| 6011 | { |
| 6012 | for (l = xcoff_hash_table (finfo->info)->size_list; |
| 6013 | l != NULL; |
| 6014 | l = l->next) |
| 6015 | { |
| 6016 | if (l->h == h) |
| 6017 | { |
| 6018 | aux.x_csect.x_scnlen.l = l->size; |
| 6019 | break; |
| 6020 | } |
| 6021 | } |
| 6022 | } |
| 6023 | } |
| 6024 | else if (h->root.type == bfd_link_hash_common) |
| 6025 | { |
| 6026 | isym.n_value = (h->root.u.c.p->section->output_section->vma |
| 6027 | + h->root.u.c.p->section->output_offset); |
| 6028 | isym.n_scnum = h->root.u.c.p->section->output_section->target_index; |
| 6029 | isym.n_sclass = C_EXT; |
| 6030 | aux.x_csect.x_smtyp = XTY_CM; |
| 6031 | aux.x_csect.x_scnlen.l = h->root.u.c.size; |
| 6032 | } |
| 6033 | else |
| 6034 | abort (); |
| 6035 | |
| 6036 | isym.n_type = T_NULL; |
| 6037 | isym.n_numaux = 1; |
| 6038 | |
| 6039 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| 6040 | outsym += bfd_coff_symesz (output_bfd); |
| 6041 | |
| 6042 | aux.x_csect.x_smclas = h->smclas; |
| 6043 | |
| 6044 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1, |
| 6045 | (PTR) outsym); |
| 6046 | outsym += bfd_coff_auxesz (output_bfd); |
| 6047 | |
| 6048 | if ((h->root.type == bfd_link_hash_defined |
| 6049 | || h->root.type == bfd_link_hash_defweak) |
| 6050 | && h->smclas != XMC_XO) |
| 6051 | { |
| 6052 | /* We just output an SD symbol. Now output an LD symbol. */ |
| 6053 | |
| 6054 | h->indx += 2; |
| 6055 | |
| 6056 | isym.n_sclass = C_EXT; |
| 6057 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| 6058 | outsym += bfd_coff_symesz (output_bfd); |
| 6059 | |
| 6060 | aux.x_csect.x_smtyp = XTY_LD; |
| 6061 | aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd); |
| 6062 | |
| 6063 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1, |
| 6064 | (PTR) outsym); |
| 6065 | outsym += bfd_coff_auxesz (output_bfd); |
| 6066 | } |
| 6067 | |
| 6068 | if (bfd_seek (output_bfd, |
| 6069 | (obj_sym_filepos (output_bfd) |
| 6070 | + (obj_raw_syment_count (output_bfd) |
| 6071 | * bfd_coff_symesz (output_bfd))), |
| 6072 | SEEK_SET) != 0 |
| 6073 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd) |
| 6074 | != (bfd_size_type) (outsym - finfo->outsyms))) |
| 6075 | return false; |
| 6076 | obj_raw_syment_count (output_bfd) += |
| 6077 | (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); |
| 6078 | |
| 6079 | return true; |
| 6080 | } |
| 6081 | |
| 6082 | /* Handle a link order which is supposed to generate a reloc. */ |
| 6083 | |
| 6084 | static boolean |
| 6085 | xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order) |
| 6086 | bfd *output_bfd; |
| 6087 | struct xcoff_final_link_info *finfo; |
| 6088 | asection *output_section; |
| 6089 | struct bfd_link_order *link_order; |
| 6090 | { |
| 6091 | reloc_howto_type *howto; |
| 6092 | struct xcoff_link_hash_entry *h; |
| 6093 | asection *hsec; |
| 6094 | bfd_vma hval; |
| 6095 | bfd_vma addend; |
| 6096 | struct internal_reloc *irel; |
| 6097 | struct xcoff_link_hash_entry **rel_hash_ptr; |
| 6098 | struct internal_ldrel ldrel; |
| 6099 | |
| 6100 | if (link_order->type == bfd_section_reloc_link_order) |
| 6101 | { |
| 6102 | /* We need to somehow locate a symbol in the right section. The |
| 6103 | symbol must either have a value of zero, or we must adjust |
| 6104 | the addend by the value of the symbol. FIXME: Write this |
| 6105 | when we need it. The old linker couldn't handle this anyhow. */ |
| 6106 | abort (); |
| 6107 | } |
| 6108 | |
| 6109 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); |
| 6110 | if (howto == NULL) |
| 6111 | { |
| 6112 | bfd_set_error (bfd_error_bad_value); |
| 6113 | return false; |
| 6114 | } |
| 6115 | |
| 6116 | h = ((struct xcoff_link_hash_entry *) |
| 6117 | bfd_wrapped_link_hash_lookup (output_bfd, finfo->info, |
| 6118 | link_order->u.reloc.p->u.name, |
| 6119 | false, false, true)); |
| 6120 | if (h == NULL) |
| 6121 | { |
| 6122 | if (! ((*finfo->info->callbacks->unattached_reloc) |
| 6123 | (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, |
| 6124 | (asection *) NULL, (bfd_vma) 0))) |
| 6125 | return false; |
| 6126 | return true; |
| 6127 | } |
| 6128 | |
| 6129 | if (h->root.type == bfd_link_hash_common) |
| 6130 | { |
| 6131 | hsec = h->root.u.c.p->section; |
| 6132 | hval = 0; |
| 6133 | } |
| 6134 | else if (h->root.type == bfd_link_hash_defined |
| 6135 | || h->root.type == bfd_link_hash_defweak) |
| 6136 | { |
| 6137 | hsec = h->root.u.def.section; |
| 6138 | hval = h->root.u.def.value; |
| 6139 | } |
| 6140 | else |
| 6141 | { |
| 6142 | hsec = NULL; |
| 6143 | hval = 0; |
| 6144 | } |
| 6145 | |
| 6146 | addend = link_order->u.reloc.p->addend; |
| 6147 | if (hsec != NULL) |
| 6148 | addend += (hsec->output_section->vma |
| 6149 | + hsec->output_offset |
| 6150 | + hval); |
| 6151 | |
| 6152 | if (addend != 0) |
| 6153 | { |
| 6154 | bfd_size_type size; |
| 6155 | bfd_byte *buf; |
| 6156 | bfd_reloc_status_type rstat; |
| 6157 | boolean ok; |
| 6158 | |
| 6159 | size = bfd_get_reloc_size (howto); |
| 6160 | buf = (bfd_byte *) bfd_zmalloc (size); |
| 6161 | if (buf == NULL) |
| 6162 | return false; |
| 6163 | |
| 6164 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
| 6165 | switch (rstat) |
| 6166 | { |
| 6167 | case bfd_reloc_ok: |
| 6168 | break; |
| 6169 | default: |
| 6170 | case bfd_reloc_outofrange: |
| 6171 | abort (); |
| 6172 | case bfd_reloc_overflow: |
| 6173 | if (! ((*finfo->info->callbacks->reloc_overflow) |
| 6174 | (finfo->info, link_order->u.reloc.p->u.name, |
| 6175 | howto->name, addend, (bfd *) NULL, (asection *) NULL, |
| 6176 | (bfd_vma) 0))) |
| 6177 | { |
| 6178 | free (buf); |
| 6179 | return false; |
| 6180 | } |
| 6181 | break; |
| 6182 | } |
| 6183 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, |
| 6184 | (file_ptr) link_order->offset, size); |
| 6185 | free (buf); |
| 6186 | if (! ok) |
| 6187 | return false; |
| 6188 | } |
| 6189 | |
| 6190 | /* Store the reloc information in the right place. It will get |
| 6191 | swapped and written out at the end of the final_link routine. */ |
| 6192 | |
| 6193 | irel = (finfo->section_info[output_section->target_index].relocs |
| 6194 | + output_section->reloc_count); |
| 6195 | rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes |
| 6196 | + output_section->reloc_count); |
| 6197 | |
| 6198 | memset (irel, 0, sizeof (struct internal_reloc)); |
| 6199 | *rel_hash_ptr = NULL; |
| 6200 | |
| 6201 | irel->r_vaddr = output_section->vma + link_order->offset; |
| 6202 | |
| 6203 | if (h->indx >= 0) |
| 6204 | irel->r_symndx = h->indx; |
| 6205 | else |
| 6206 | { |
| 6207 | /* Set the index to -2 to force this symbol to get written out. */ |
| 6208 | h->indx = -2; |
| 6209 | *rel_hash_ptr = h; |
| 6210 | irel->r_symndx = 0; |
| 6211 | } |
| 6212 | |
| 6213 | irel->r_type = howto->type; |
| 6214 | irel->r_size = howto->bitsize - 1; |
| 6215 | if (howto->complain_on_overflow == complain_overflow_signed) |
| 6216 | irel->r_size |= 0x80; |
| 6217 | |
| 6218 | ++output_section->reloc_count; |
| 6219 | |
| 6220 | /* Now output the reloc to the .loader section. */ |
| 6221 | |
| 6222 | ldrel.l_vaddr = irel->r_vaddr; |
| 6223 | |
| 6224 | if (hsec != NULL) |
| 6225 | { |
| 6226 | const char *secname; |
| 6227 | |
| 6228 | secname = hsec->output_section->name; |
| 6229 | |
| 6230 | if (strcmp (secname, ".text") == 0) |
| 6231 | ldrel.l_symndx = 0; |
| 6232 | else if (strcmp (secname, ".data") == 0) |
| 6233 | ldrel.l_symndx = 1; |
| 6234 | else if (strcmp (secname, ".bss") == 0) |
| 6235 | ldrel.l_symndx = 2; |
| 6236 | else |
| 6237 | { |
| 6238 | (*_bfd_error_handler) |
| 6239 | (_("%s: loader reloc in unrecognized section `%s'"), |
| 6240 | bfd_get_filename (output_bfd), secname); |
| 6241 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 6242 | return false; |
| 6243 | } |
| 6244 | } |
| 6245 | else |
| 6246 | { |
| 6247 | if (h->ldindx < 0) |
| 6248 | { |
| 6249 | (*_bfd_error_handler) |
| 6250 | (_("%s: `%s' in loader reloc but not loader sym"), |
| 6251 | bfd_get_filename (output_bfd), |
| 6252 | h->root.root.string); |
| 6253 | bfd_set_error (bfd_error_bad_value); |
| 6254 | return false; |
| 6255 | } |
| 6256 | ldrel.l_symndx = h->ldindx; |
| 6257 | } |
| 6258 | |
| 6259 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
| 6260 | ldrel.l_rsecnm = output_section->target_index; |
| 6261 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| 6262 | ++finfo->ldrel; |
| 6263 | |
| 6264 | return true; |
| 6265 | } |
| 6266 | |
| 6267 | /* Sort relocs by VMA. This is called via qsort. */ |
| 6268 | |
| 6269 | static int |
| 6270 | xcoff_sort_relocs (p1, p2) |
| 6271 | const PTR p1; |
| 6272 | const PTR p2; |
| 6273 | { |
| 6274 | const struct internal_reloc *r1 = (const struct internal_reloc *) p1; |
| 6275 | const struct internal_reloc *r2 = (const struct internal_reloc *) p2; |
| 6276 | |
| 6277 | if (r1->r_vaddr > r2->r_vaddr) |
| 6278 | return 1; |
| 6279 | else if (r1->r_vaddr < r2->r_vaddr) |
| 6280 | return -1; |
| 6281 | else |
| 6282 | return 0; |
| 6283 | } |
| 6284 | |
| 6285 | /* This is the relocation function for the RS/6000/POWER/PowerPC. |
| 6286 | This is currently the only processor which uses XCOFF; I hope that |
| 6287 | will never change. */ |
| 6288 | |
| 6289 | boolean |
| 6290 | _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd, |
| 6291 | input_section, contents, relocs, syms, |
| 6292 | sections) |
| 6293 | bfd *output_bfd; |
| 6294 | struct bfd_link_info *info; |
| 6295 | bfd *input_bfd; |
| 6296 | asection *input_section; |
| 6297 | bfd_byte *contents; |
| 6298 | struct internal_reloc *relocs; |
| 6299 | struct internal_syment *syms; |
| 6300 | asection **sections; |
| 6301 | { |
| 6302 | struct internal_reloc *rel; |
| 6303 | struct internal_reloc *relend; |
| 6304 | |
| 6305 | rel = relocs; |
| 6306 | relend = rel + input_section->reloc_count; |
| 6307 | for (; rel < relend; rel++) |
| 6308 | { |
| 6309 | long symndx; |
| 6310 | struct xcoff_link_hash_entry *h; |
| 6311 | struct internal_syment *sym; |
| 6312 | bfd_vma addend; |
| 6313 | bfd_vma val; |
| 6314 | struct reloc_howto_struct howto; |
| 6315 | bfd_reloc_status_type rstat; |
| 6316 | |
| 6317 | /* Relocation type R_REF is a special relocation type which is |
| 6318 | merely used to prevent garbage collection from occurring for |
| 6319 | the csect including the symbol which it references. */ |
| 6320 | if (rel->r_type == R_REF) |
| 6321 | continue; |
| 6322 | |
| 6323 | symndx = rel->r_symndx; |
| 6324 | |
| 6325 | if (symndx == -1) |
| 6326 | { |
| 6327 | h = NULL; |
| 6328 | sym = NULL; |
| 6329 | addend = 0; |
| 6330 | } |
| 6331 | else |
| 6332 | { |
| 6333 | h = obj_xcoff_sym_hashes (input_bfd)[symndx]; |
| 6334 | sym = syms + symndx; |
| 6335 | addend = - sym->n_value; |
| 6336 | } |
| 6337 | |
| 6338 | /* We build the howto information on the fly. */ |
| 6339 | |
| 6340 | howto.type = rel->r_type; |
| 6341 | howto.rightshift = 0; |
| 6342 | howto.size = 2; |
| 6343 | howto.bitsize = (rel->r_size & 0x1f) + 1; |
| 6344 | howto.pc_relative = false; |
| 6345 | howto.bitpos = 0; |
| 6346 | if ((rel->r_size & 0x80) != 0) |
| 6347 | howto.complain_on_overflow = complain_overflow_signed; |
| 6348 | else |
| 6349 | howto.complain_on_overflow = complain_overflow_bitfield; |
| 6350 | howto.special_function = NULL; |
| 6351 | howto.name = "internal"; |
| 6352 | howto.partial_inplace = true; |
| 6353 | if (howto.bitsize == 32) |
| 6354 | howto.src_mask = howto.dst_mask = 0xffffffff; |
| 6355 | else |
| 6356 | { |
| 6357 | howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1; |
| 6358 | if (howto.bitsize == 16) |
| 6359 | howto.size = 1; |
| 6360 | } |
| 6361 | howto.pcrel_offset = false; |
| 6362 | |
| 6363 | val = 0; |
| 6364 | |
| 6365 | if (h == NULL) |
| 6366 | { |
| 6367 | asection *sec; |
| 6368 | |
| 6369 | if (symndx == -1) |
| 6370 | { |
| 6371 | sec = bfd_abs_section_ptr; |
| 6372 | val = 0; |
| 6373 | } |
| 6374 | else |
| 6375 | { |
| 6376 | sec = sections[symndx]; |
| 6377 | /* Hack to make sure we use the right TOC anchor value |
| 6378 | if this reloc is against the TOC anchor. */ |
| 6379 | if (sec->name[3] == '0' |
| 6380 | && strcmp (sec->name, ".tc0") == 0) |
| 6381 | val = xcoff_data (output_bfd)->toc; |
| 6382 | else |
| 6383 | val = (sec->output_section->vma |
| 6384 | + sec->output_offset |
| 6385 | + sym->n_value |
| 6386 | - sec->vma); |
| 6387 | } |
| 6388 | } |
| 6389 | else |
| 6390 | { |
| 6391 | if (h->root.type == bfd_link_hash_defined |
| 6392 | || h->root.type == bfd_link_hash_defweak) |
| 6393 | { |
| 6394 | asection *sec; |
| 6395 | |
| 6396 | sec = h->root.u.def.section; |
| 6397 | val = (h->root.u.def.value |
| 6398 | + sec->output_section->vma |
| 6399 | + sec->output_offset); |
| 6400 | } |
| 6401 | else if (h->root.type == bfd_link_hash_common) |
| 6402 | { |
| 6403 | asection *sec; |
| 6404 | |
| 6405 | sec = h->root.u.c.p->section; |
| 6406 | val = (sec->output_section->vma |
| 6407 | + sec->output_offset); |
| 6408 | } |
| 6409 | else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0 |
| 6410 | || (h->flags & XCOFF_IMPORT) != 0) |
| 6411 | { |
| 6412 | /* Every symbol in a shared object is defined somewhere. */ |
| 6413 | val = 0; |
| 6414 | } |
| 6415 | else if (! info->relocateable) |
| 6416 | { |
| 6417 | if (! ((*info->callbacks->undefined_symbol) |
| 6418 | (info, h->root.root.string, input_bfd, input_section, |
| 6419 | rel->r_vaddr - input_section->vma))) |
| 6420 | return false; |
| 6421 | |
| 6422 | /* Don't try to process the reloc. It can't help, and |
| 6423 | it may generate another error. */ |
| 6424 | continue; |
| 6425 | } |
| 6426 | } |
| 6427 | |
| 6428 | /* I took the relocation type definitions from two documents: |
| 6429 | the PowerPC AIX Version 4 Application Binary Interface, First |
| 6430 | Edition (April 1992), and the PowerOpen ABI, Big-Endian |
| 6431 | 32-Bit Hardware Implementation (June 30, 1994). Differences |
| 6432 | between the documents are noted below. */ |
| 6433 | |
| 6434 | switch (rel->r_type) |
| 6435 | { |
| 6436 | case R_RTB: |
| 6437 | case R_RRTBI: |
| 6438 | case R_RRTBA: |
| 6439 | /* These relocs are defined by the PowerPC ABI to be |
| 6440 | relative branches which use half of the difference |
| 6441 | between the symbol and the program counter. I can't |
| 6442 | quite figure out when this is useful. These relocs are |
| 6443 | not defined by the PowerOpen ABI. */ |
| 6444 | default: |
| 6445 | (*_bfd_error_handler) |
| 6446 | (_("%s: unsupported relocation type 0x%02x"), |
| 6447 | bfd_get_filename (input_bfd), (unsigned int) rel->r_type); |
| 6448 | bfd_set_error (bfd_error_bad_value); |
| 6449 | return false; |
| 6450 | case R_POS: |
| 6451 | /* Simple positive relocation. */ |
| 6452 | break; |
| 6453 | case R_NEG: |
| 6454 | /* Simple negative relocation. */ |
| 6455 | val = - val; |
| 6456 | break; |
| 6457 | case R_REL: |
| 6458 | /* Simple PC relative relocation. */ |
| 6459 | howto.pc_relative = true; |
| 6460 | break; |
| 6461 | case R_TOC: |
| 6462 | /* TOC relative relocation. The value in the instruction in |
| 6463 | the input file is the offset from the input file TOC to |
| 6464 | the desired location. We want the offset from the final |
| 6465 | TOC to the desired location. We have: |
| 6466 | isym = iTOC + in |
| 6467 | iinsn = in + o |
| 6468 | osym = oTOC + on |
| 6469 | oinsn = on + o |
| 6470 | so we must change insn by on - in. |
| 6471 | */ |
| 6472 | case R_GL: |
| 6473 | /* Global linkage relocation. The value of this relocation |
| 6474 | is the address of the entry in the TOC section. */ |
| 6475 | case R_TCL: |
| 6476 | /* Local object TOC address. I can't figure out the |
| 6477 | difference between this and case R_GL. */ |
| 6478 | case R_TRL: |
| 6479 | /* TOC relative relocation. A TOC relative load instruction |
| 6480 | which may be changed to a load address instruction. |
| 6481 | FIXME: We don't currently implement this optimization. */ |
| 6482 | case R_TRLA: |
| 6483 | /* TOC relative relocation. This is a TOC relative load |
| 6484 | address instruction which may be changed to a load |
| 6485 | instruction. FIXME: I don't know if this is the correct |
| 6486 | implementation. */ |
| 6487 | if (h != NULL && h->smclas != XMC_TD) |
| 6488 | { |
| 6489 | if (h->toc_section == NULL) |
| 6490 | { |
| 6491 | (*_bfd_error_handler) |
| 6492 | (_("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry"), |
| 6493 | bfd_get_filename (input_bfd), rel->r_vaddr, |
| 6494 | h->root.root.string); |
| 6495 | bfd_set_error (bfd_error_bad_value); |
| 6496 | return false; |
| 6497 | } |
| 6498 | |
| 6499 | BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); |
| 6500 | val = (h->toc_section->output_section->vma |
| 6501 | + h->toc_section->output_offset); |
| 6502 | } |
| 6503 | |
| 6504 | val = ((val - xcoff_data (output_bfd)->toc) |
| 6505 | - (sym->n_value - xcoff_data (input_bfd)->toc)); |
| 6506 | addend = 0; |
| 6507 | break; |
| 6508 | case R_BA: |
| 6509 | /* Absolute branch. We don't want to mess with the lower |
| 6510 | two bits of the instruction. */ |
| 6511 | case R_CAI: |
| 6512 | /* The PowerPC ABI defines this as an absolute call which |
| 6513 | may be modified to become a relative call. The PowerOpen |
| 6514 | ABI does not define this relocation type. */ |
| 6515 | case R_RBA: |
| 6516 | /* Absolute branch which may be modified to become a |
| 6517 | relative branch. */ |
| 6518 | case R_RBAC: |
| 6519 | /* The PowerPC ABI defines this as an absolute branch to a |
| 6520 | fixed address which may be modified to an absolute branch |
| 6521 | to a symbol. The PowerOpen ABI does not define this |
| 6522 | relocation type. */ |
| 6523 | case R_RBRC: |
| 6524 | /* The PowerPC ABI defines this as an absolute branch to a |
| 6525 | fixed address which may be modified to a relative branch. |
| 6526 | The PowerOpen ABI does not define this relocation type. */ |
| 6527 | howto.src_mask &= ~3; |
| 6528 | howto.dst_mask = howto.src_mask; |
| 6529 | break; |
| 6530 | case R_BR: |
| 6531 | /* Relative branch. We don't want to mess with the lower |
| 6532 | two bits of the instruction. */ |
| 6533 | case R_CREL: |
| 6534 | /* The PowerPC ABI defines this as a relative call which may |
| 6535 | be modified to become an absolute call. The PowerOpen |
| 6536 | ABI does not define this relocation type. */ |
| 6537 | case R_RBR: |
| 6538 | /* A relative branch which may be modified to become an |
| 6539 | absolute branch. FIXME: We don't implement this, |
| 6540 | although we should for symbols of storage mapping class |
| 6541 | XMC_XO. */ |
| 6542 | howto.pc_relative = true; |
| 6543 | howto.src_mask &= ~3; |
| 6544 | howto.dst_mask = howto.src_mask; |
| 6545 | break; |
| 6546 | case R_RL: |
| 6547 | /* The PowerPC AIX ABI describes this as a load which may be |
| 6548 | changed to a load address. The PowerOpen ABI says this |
| 6549 | is the same as case R_POS. */ |
| 6550 | break; |
| 6551 | case R_RLA: |
| 6552 | /* The PowerPC AIX ABI describes this as a load address |
| 6553 | which may be changed to a load. The PowerOpen ABI says |
| 6554 | this is the same as R_POS. */ |
| 6555 | break; |
| 6556 | } |
| 6557 | |
| 6558 | /* If we see an R_BR or R_RBR reloc which is jumping to global |
| 6559 | linkage code, and it is followed by an appropriate cror nop |
| 6560 | instruction, we replace the cror with lwz r2,20(r1). This |
| 6561 | restores the TOC after the glink code. Contrariwise, if the |
| 6562 | call is followed by a lwz r2,20(r1), but the call is not |
| 6563 | going to global linkage code, we can replace the load with a |
| 6564 | cror. */ |
| 6565 | if ((rel->r_type == R_BR || rel->r_type == R_RBR) |
| 6566 | && h != NULL |
| 6567 | && h->root.type == bfd_link_hash_defined |
| 6568 | && (rel->r_vaddr - input_section->vma + 8 |
| 6569 | <= input_section->_cooked_size)) |
| 6570 | { |
| 6571 | bfd_byte *pnext; |
| 6572 | unsigned long next; |
| 6573 | |
| 6574 | pnext = contents + (rel->r_vaddr - input_section->vma) + 4; |
| 6575 | next = bfd_get_32 (input_bfd, pnext); |
| 6576 | |
| 6577 | /* The _ptrgl function is magic. It is used by the AIX |
| 6578 | compiler to call a function through a pointer. */ |
| 6579 | if (h->smclas == XMC_GL |
| 6580 | || strcmp (h->root.root.string, "._ptrgl") == 0) |
| 6581 | { |
| 6582 | if (next == 0x4def7b82 /* cror 15,15,15 */ |
| 6583 | || next == 0x4ffffb82) /* cror 31,31,31 */ |
| 6584 | bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */ |
| 6585 | } |
| 6586 | else |
| 6587 | { |
| 6588 | if (next == 0x80410014) /* lwz r1,20(r1) */ |
| 6589 | bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */ |
| 6590 | } |
| 6591 | } |
| 6592 | |
| 6593 | /* A PC relative reloc includes the section address. */ |
| 6594 | if (howto.pc_relative) |
| 6595 | addend += input_section->vma; |
| 6596 | |
| 6597 | rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section, |
| 6598 | contents, |
| 6599 | rel->r_vaddr - input_section->vma, |
| 6600 | val, addend); |
| 6601 | |
| 6602 | switch (rstat) |
| 6603 | { |
| 6604 | default: |
| 6605 | abort (); |
| 6606 | case bfd_reloc_ok: |
| 6607 | break; |
| 6608 | case bfd_reloc_overflow: |
| 6609 | { |
| 6610 | const char *name; |
| 6611 | char buf[SYMNMLEN + 1]; |
| 6612 | char howto_name[10]; |
| 6613 | |
| 6614 | if (symndx == -1) |
| 6615 | name = "*ABS*"; |
| 6616 | else if (h != NULL) |
| 6617 | name = h->root.root.string; |
| 6618 | else |
| 6619 | { |
| 6620 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); |
| 6621 | if (name == NULL) |
| 6622 | return false; |
| 6623 | } |
| 6624 | sprintf (howto_name, "0x%02x", rel->r_type); |
| 6625 | |
| 6626 | if (! ((*info->callbacks->reloc_overflow) |
| 6627 | (info, name, howto_name, (bfd_vma) 0, input_bfd, |
| 6628 | input_section, rel->r_vaddr - input_section->vma))) |
| 6629 | return false; |
| 6630 | } |
| 6631 | } |
| 6632 | } |
| 6633 | |
| 6634 | return true; |
| 6635 | } |