| 1 | /* BFD back-end for PDP-11 a.out binaries. |
| 2 | Copyright (C) 2001-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | |
| 22 | /* BFD backend for PDP-11, running 2.11BSD in particular. |
| 23 | |
| 24 | This file was hacked up by looking hard at the existing vaxnetbsd |
| 25 | back end and the header files in 2.11BSD. |
| 26 | |
| 27 | TODO |
| 28 | * support for V7 file formats |
| 29 | * support for overlay object files (see 2.11 a.out(5)) |
| 30 | * support for old and very old archives |
| 31 | (see 2.11 ar(5), historical section) |
| 32 | |
| 33 | Search for TODO to find other areas needing more work. */ |
| 34 | |
| 35 | #define BYTES_IN_WORD 2 |
| 36 | #define BYTES_IN_LONG 4 |
| 37 | #define ARCH_SIZE 16 |
| 38 | #undef TARGET_IS_BIG_ENDIAN_P |
| 39 | |
| 40 | #define TARGET_PAGE_SIZE 8192 |
| 41 | #define SEGMENT__SIZE TARGET_PAGE_SIZE |
| 42 | |
| 43 | #define DEFAULT_ARCH bfd_arch_pdp11 |
| 44 | #define DEFAULT_MID M_PDP11 |
| 45 | |
| 46 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not |
| 47 | remove whitespace added here, and thus will fail to concatenate |
| 48 | the tokens. */ |
| 49 | #define MY(OP) CONCAT2 (pdp11_aout_,OP) |
| 50 | |
| 51 | /* This needs to start with a.out so GDB knows it is an a.out variant. */ |
| 52 | #define TARGETNAME "a.out-pdp11" |
| 53 | |
| 54 | /* This is the normal load address for executables. */ |
| 55 | #define TEXT_START_ADDR 0 |
| 56 | |
| 57 | /* The header is not included in the text segment. */ |
| 58 | #define N_HEADER_IN_TEXT(x) 0 |
| 59 | |
| 60 | /* There is no flags field. */ |
| 61 | #define N_FLAGS(execp) 0 |
| 62 | |
| 63 | #define N_SET_FLAGS(execp, flags) do { } while (0) |
| 64 | #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ |
| 65 | && N_MAGIC(x) != NMAGIC \ |
| 66 | && N_MAGIC(x) != IMAGIC \ |
| 67 | && N_MAGIC(x) != ZMAGIC) |
| 68 | |
| 69 | #include "sysdep.h" |
| 70 | #include <limits.h> |
| 71 | #include "bfd.h" |
| 72 | |
| 73 | #define external_exec pdp11_external_exec |
| 74 | struct pdp11_external_exec |
| 75 | { |
| 76 | bfd_byte e_info[2]; /* Magic number. */ |
| 77 | bfd_byte e_text[2]; /* Length of text section in bytes. */ |
| 78 | bfd_byte e_data[2]; /* Length of data section in bytes. */ |
| 79 | bfd_byte e_bss[2]; /* Length of bss area in bytes. */ |
| 80 | bfd_byte e_syms[2]; /* Length of symbol table in bytes. */ |
| 81 | bfd_byte e_entry[2]; /* Start address. */ |
| 82 | bfd_byte e_unused[2]; /* Not used. */ |
| 83 | bfd_byte e_flag[2]; /* Relocation info stripped. */ |
| 84 | bfd_byte e_relocatable; /* Ugly hack. */ |
| 85 | }; |
| 86 | |
| 87 | #define EXEC_BYTES_SIZE (8 * 2) |
| 88 | |
| 89 | #define A_MAGIC1 OMAGIC |
| 90 | #define OMAGIC 0407 /* ...object file or impure executable. */ |
| 91 | #define A_MAGIC2 NMAGIC |
| 92 | #define NMAGIC 0410 /* Pure executable. */ |
| 93 | #define ZMAGIC 0413 /* Demand-paged executable. */ |
| 94 | #define IMAGIC 0411 /* Separated I&D. */ |
| 95 | #define A_MAGIC3 IMAGIC |
| 96 | #define A_MAGIC4 0405 /* Overlay. */ |
| 97 | #define A_MAGIC5 0430 /* Auto-overlay (nonseparate). */ |
| 98 | #define A_MAGIC6 0431 /* Auto-overlay (separate). */ |
| 99 | #define QMAGIC 0 |
| 100 | #define BMAGIC 0 |
| 101 | |
| 102 | #define A_FLAG_RELOC_STRIPPED 0x0001 |
| 103 | |
| 104 | #define external_nlist pdp11_external_nlist |
| 105 | struct pdp11_external_nlist |
| 106 | { |
| 107 | bfd_byte e_unused[2]; /* Unused. */ |
| 108 | bfd_byte e_strx[2]; /* Index into string table of name. */ |
| 109 | bfd_byte e_type[1]; /* Type of symbol. */ |
| 110 | bfd_byte e_ovly[1]; /* Overlay number. */ |
| 111 | bfd_byte e_value[2]; /* Value of symbol. */ |
| 112 | }; |
| 113 | |
| 114 | #define EXTERNAL_NLIST_SIZE 8 |
| 115 | |
| 116 | #define N_TXTOFF(x) (EXEC_BYTES_SIZE) |
| 117 | #define N_DATOFF(x) (N_TXTOFF(x) + (x)->a_text) |
| 118 | #define N_TRELOFF(x) (N_DATOFF(x) + (x)->a_data) |
| 119 | #define N_DRELOFF(x) (N_TRELOFF(x) + (x)->a_trsize) |
| 120 | #define N_SYMOFF(x) (N_DRELOFF(x) + (x)->a_drsize) |
| 121 | #define N_STROFF(x) (N_SYMOFF(x) + (x)->a_syms) |
| 122 | |
| 123 | #define WRITE_HEADERS(abfd, execp) pdp11_aout_write_headers (abfd, execp) |
| 124 | |
| 125 | #include "libbfd.h" |
| 126 | #include "libaout.h" |
| 127 | |
| 128 | #define SWAP_MAGIC(ext) bfd_getl16 (ext) |
| 129 | |
| 130 | #define MY_entry_is_text_address 1 |
| 131 | |
| 132 | #define MY_write_object_contents MY(write_object_contents) |
| 133 | static bfd_boolean MY(write_object_contents) (bfd *); |
| 134 | #define MY_text_includes_header 1 |
| 135 | |
| 136 | #define MY_BFD_TARGET |
| 137 | |
| 138 | #include "aout-target.h" |
| 139 | |
| 140 | /* Start of modified aoutx.h. */ |
| 141 | #define KEEPIT udata.i |
| 142 | |
| 143 | #include <string.h> /* For strchr and friends. */ |
| 144 | #include "bfd.h" |
| 145 | #include "sysdep.h" |
| 146 | #include "safe-ctype.h" |
| 147 | #include "bfdlink.h" |
| 148 | |
| 149 | #include "libaout.h" |
| 150 | #include "aout/aout64.h" |
| 151 | #include "aout/stab_gnu.h" |
| 152 | #include "aout/ar.h" |
| 153 | |
| 154 | #undef N_TYPE |
| 155 | #undef N_UNDF |
| 156 | #undef N_ABS |
| 157 | #undef N_TEXT |
| 158 | #undef N_DATA |
| 159 | #undef N_BSS |
| 160 | #undef N_REG |
| 161 | #undef N_FN |
| 162 | #undef N_EXT |
| 163 | #undef N_STAB |
| 164 | #define N_TYPE 0x1f /* Type mask. */ |
| 165 | #define N_UNDF 0x00 /* Undefined. */ |
| 166 | #define N_ABS 0x01 /* Absolute. */ |
| 167 | #define N_TEXT 0x02 /* Text segment. */ |
| 168 | #define N_DATA 0x03 /* Data segment. */ |
| 169 | #define N_BSS 0x04 /* Bss segment. */ |
| 170 | #define N_REG 0x14 /* Register symbol. */ |
| 171 | #define N_FN 0x1f /* File name. */ |
| 172 | #define N_EXT 0x20 /* External flag. */ |
| 173 | #define N_STAB 0xc0 /* Not relevant; modified aout64.h's 0xe0 to avoid N_EXT. */ |
| 174 | |
| 175 | #define RELOC_SIZE 2 |
| 176 | |
| 177 | #define RELFLG 0x0001 /* PC-relative flag. */ |
| 178 | #define RTYPE 0x000e /* Type mask. */ |
| 179 | #define RIDXMASK 0xfff0 /* Index mask. */ |
| 180 | |
| 181 | #define RABS 0x00 /* Absolute. */ |
| 182 | #define RTEXT 0x02 /* Text. */ |
| 183 | #define RDATA 0x04 /* Data. */ |
| 184 | #define RBSS 0x06 /* Bss. */ |
| 185 | #define REXT 0x08 /* External. */ |
| 186 | |
| 187 | #define RINDEX(x) (((x) & 0xfff0) >> 4) |
| 188 | |
| 189 | #ifndef MY_final_link_relocate |
| 190 | #define MY_final_link_relocate _bfd_final_link_relocate |
| 191 | #endif |
| 192 | |
| 193 | #ifndef MY_relocate_contents |
| 194 | #define MY_relocate_contents _bfd_relocate_contents |
| 195 | #endif |
| 196 | |
| 197 | /* A hash table used for header files with N_BINCL entries. */ |
| 198 | |
| 199 | struct aout_link_includes_table |
| 200 | { |
| 201 | struct bfd_hash_table root; |
| 202 | }; |
| 203 | |
| 204 | /* A linked list of totals that we have found for a particular header |
| 205 | file. */ |
| 206 | |
| 207 | struct aout_link_includes_totals |
| 208 | { |
| 209 | struct aout_link_includes_totals *next; |
| 210 | bfd_vma total; |
| 211 | }; |
| 212 | |
| 213 | /* An entry in the header file hash table. */ |
| 214 | |
| 215 | struct aout_link_includes_entry |
| 216 | { |
| 217 | struct bfd_hash_entry root; |
| 218 | /* List of totals we have found for this file. */ |
| 219 | struct aout_link_includes_totals *totals; |
| 220 | }; |
| 221 | |
| 222 | /* During the final link step we need to pass around a bunch of |
| 223 | information, so we do it in an instance of this structure. */ |
| 224 | |
| 225 | struct aout_final_link_info |
| 226 | { |
| 227 | /* General link information. */ |
| 228 | struct bfd_link_info *info; |
| 229 | /* Output bfd. */ |
| 230 | bfd *output_bfd; |
| 231 | /* Reloc file positions. */ |
| 232 | file_ptr treloff, dreloff; |
| 233 | /* File position of symbols. */ |
| 234 | file_ptr symoff; |
| 235 | /* String table. */ |
| 236 | struct bfd_strtab_hash *strtab; |
| 237 | /* Header file hash table. */ |
| 238 | struct aout_link_includes_table includes; |
| 239 | /* A buffer large enough to hold the contents of any section. */ |
| 240 | bfd_byte *contents; |
| 241 | /* A buffer large enough to hold the relocs of any section. */ |
| 242 | void * relocs; |
| 243 | /* A buffer large enough to hold the symbol map of any input BFD. */ |
| 244 | int *symbol_map; |
| 245 | /* A buffer large enough to hold output symbols of any input BFD. */ |
| 246 | struct external_nlist *output_syms; |
| 247 | }; |
| 248 | |
| 249 | /* Copy of the link_info.separate_code boolean to select the output format with |
| 250 | separate instruction and data spaces selected by --imagic */ |
| 251 | static bfd_boolean separate_i_d = FALSE; |
| 252 | |
| 253 | reloc_howto_type howto_table_pdp11[] = |
| 254 | { |
| 255 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ |
| 256 | HOWTO( 0, 0, 1, 16, FALSE, 0, complain_overflow_signed,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 257 | HOWTO( 1, 0, 1, 16, TRUE, 0, complain_overflow_signed,0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 258 | HOWTO( 2, 0, 2, 32, FALSE, 0, complain_overflow_signed,0,"32", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 259 | }; |
| 260 | |
| 261 | #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0])) |
| 262 | |
| 263 | |
| 264 | static bfd_boolean aout_link_check_archive_element (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, bfd_boolean *); |
| 265 | static bfd_boolean aout_link_add_object_symbols (bfd *, struct bfd_link_info *); |
| 266 | static bfd_boolean aout_link_add_symbols (bfd *, struct bfd_link_info *); |
| 267 | static bfd_boolean aout_link_write_symbols (struct aout_final_link_info *, bfd *); |
| 268 | |
| 269 | |
| 270 | reloc_howto_type * |
| 271 | NAME (aout, reloc_type_lookup) (bfd * abfd ATTRIBUTE_UNUSED, |
| 272 | bfd_reloc_code_real_type code) |
| 273 | { |
| 274 | switch (code) |
| 275 | { |
| 276 | case BFD_RELOC_16: |
| 277 | return &howto_table_pdp11[0]; |
| 278 | case BFD_RELOC_16_PCREL: |
| 279 | return &howto_table_pdp11[1]; |
| 280 | case BFD_RELOC_32: |
| 281 | return &howto_table_pdp11[2]; |
| 282 | default: |
| 283 | return NULL; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | reloc_howto_type * |
| 288 | NAME (aout, reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED, |
| 289 | const char *r_name) |
| 290 | { |
| 291 | unsigned int i; |
| 292 | |
| 293 | for (i = 0; |
| 294 | i < sizeof (howto_table_pdp11) / sizeof (howto_table_pdp11[0]); |
| 295 | i++) |
| 296 | if (howto_table_pdp11[i].name != NULL |
| 297 | && strcasecmp (howto_table_pdp11[i].name, r_name) == 0) |
| 298 | return &howto_table_pdp11[i]; |
| 299 | |
| 300 | return NULL; |
| 301 | } |
| 302 | |
| 303 | static int |
| 304 | pdp11_aout_write_headers (bfd *abfd, struct internal_exec *execp) |
| 305 | { |
| 306 | struct external_exec exec_bytes; |
| 307 | |
| 308 | if (adata(abfd).magic == undecided_magic) |
| 309 | NAME (aout, adjust_sizes_and_vmas) (abfd); |
| 310 | |
| 311 | execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; |
| 312 | execp->a_entry = bfd_get_start_address (abfd); |
| 313 | |
| 314 | if (obj_textsec (abfd)->reloc_count > 0 |
| 315 | || obj_datasec (abfd)->reloc_count > 0) |
| 316 | { |
| 317 | execp->a_trsize = execp->a_text; |
| 318 | execp->a_drsize = execp->a_data; |
| 319 | } |
| 320 | else |
| 321 | { |
| 322 | execp->a_trsize = 0; |
| 323 | execp->a_drsize = 0; |
| 324 | } |
| 325 | |
| 326 | NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes); |
| 327 | |
| 328 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) |
| 329 | return FALSE; |
| 330 | |
| 331 | if (bfd_bwrite ((void *) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd) |
| 332 | != EXEC_BYTES_SIZE) |
| 333 | return FALSE; |
| 334 | |
| 335 | /* Now write out reloc info, followed by syms and strings. */ |
| 336 | if (bfd_get_outsymbols (abfd) != NULL |
| 337 | && bfd_get_symcount (abfd) != 0) |
| 338 | { |
| 339 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (execp)), SEEK_SET) != 0) |
| 340 | return FALSE; |
| 341 | |
| 342 | if (! NAME (aout, write_syms) (abfd)) |
| 343 | return FALSE; |
| 344 | } |
| 345 | |
| 346 | if (obj_textsec (abfd)->reloc_count > 0 |
| 347 | || obj_datasec (abfd)->reloc_count > 0) |
| 348 | { |
| 349 | if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (execp)), SEEK_SET) != 0 |
| 350 | || !NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)) |
| 351 | || bfd_seek (abfd, (file_ptr) (N_DRELOFF (execp)), SEEK_SET) != 0 |
| 352 | || !NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd))) |
| 353 | return FALSE; |
| 354 | } |
| 355 | |
| 356 | return TRUE; |
| 357 | } |
| 358 | |
| 359 | /* Write an object file. |
| 360 | Section contents have already been written. We write the |
| 361 | file header, symbols, and relocation. */ |
| 362 | |
| 363 | static bfd_boolean |
| 364 | MY(write_object_contents) (bfd *abfd) |
| 365 | { |
| 366 | struct internal_exec *execp = exec_hdr (abfd); |
| 367 | |
| 368 | /* We must make certain that the magic number has been set. This |
| 369 | will normally have been done by set_section_contents, but only if |
| 370 | there actually are some section contents. */ |
| 371 | if (! abfd->output_has_begun) |
| 372 | NAME (aout, adjust_sizes_and_vmas) (abfd); |
| 373 | |
| 374 | obj_reloc_entry_size (abfd) = RELOC_SIZE; |
| 375 | |
| 376 | return WRITE_HEADERS (abfd, execp); |
| 377 | } |
| 378 | |
| 379 | /* Swap the information in an executable header @var{raw_bytes} taken |
| 380 | from a raw byte stream memory image into the internal exec header |
| 381 | structure "execp". */ |
| 382 | |
| 383 | #ifndef NAME_swap_exec_header_in |
| 384 | void |
| 385 | NAME (aout, swap_exec_header_in) (bfd *abfd, |
| 386 | struct external_exec *bytes, |
| 387 | struct internal_exec *execp) |
| 388 | { |
| 389 | /* The internal_exec structure has some fields that are unused in this |
| 390 | configuration (IE for i960), so ensure that all such uninitialized |
| 391 | fields are zero'd out. There are places where two of these structs |
| 392 | are memcmp'd, and thus the contents do matter. */ |
| 393 | memset ((void *) execp, 0, sizeof (struct internal_exec)); |
| 394 | /* Now fill in fields in the execp, from the bytes in the raw data. */ |
| 395 | execp->a_info = GET_MAGIC (abfd, bytes->e_info); |
| 396 | execp->a_text = GET_WORD (abfd, bytes->e_text); |
| 397 | execp->a_data = GET_WORD (abfd, bytes->e_data); |
| 398 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); |
| 399 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); |
| 400 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); |
| 401 | |
| 402 | if (GET_WORD (abfd, bytes->e_flag) & A_FLAG_RELOC_STRIPPED) |
| 403 | { |
| 404 | execp->a_trsize = 0; |
| 405 | execp->a_drsize = 0; |
| 406 | } |
| 407 | else |
| 408 | { |
| 409 | execp->a_trsize = execp->a_text; |
| 410 | execp->a_drsize = execp->a_data; |
| 411 | } |
| 412 | } |
| 413 | #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) |
| 414 | #endif |
| 415 | |
| 416 | /* Swap the information in an internal exec header structure |
| 417 | "execp" into the buffer "bytes" ready for writing to disk. */ |
| 418 | void |
| 419 | NAME (aout, swap_exec_header_out) (bfd *abfd, |
| 420 | struct internal_exec *execp, |
| 421 | struct external_exec *bytes) |
| 422 | { |
| 423 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ |
| 424 | PUT_MAGIC (abfd, execp->a_info, bytes->e_info); |
| 425 | PUT_WORD (abfd, execp->a_text, bytes->e_text); |
| 426 | PUT_WORD (abfd, execp->a_data, bytes->e_data); |
| 427 | PUT_WORD (abfd, execp->a_bss, bytes->e_bss); |
| 428 | PUT_WORD (abfd, execp->a_syms, bytes->e_syms); |
| 429 | PUT_WORD (abfd, execp->a_entry, bytes->e_entry); |
| 430 | PUT_WORD (abfd, 0, bytes->e_unused); |
| 431 | |
| 432 | if ((execp->a_trsize == 0 || execp->a_text == 0) |
| 433 | && (execp->a_drsize == 0 || execp->a_data == 0)) |
| 434 | PUT_WORD (abfd, A_FLAG_RELOC_STRIPPED, bytes->e_flag); |
| 435 | else if (execp->a_trsize == execp->a_text |
| 436 | && execp->a_drsize == execp->a_data) |
| 437 | PUT_WORD (abfd, 0, bytes->e_flag); |
| 438 | else |
| 439 | { |
| 440 | /* TODO: print a proper warning message. */ |
| 441 | fprintf (stderr, "BFD:%s:%d: internal error\n", __FILE__, __LINE__); |
| 442 | PUT_WORD (abfd, 0, bytes->e_flag); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /* Make all the section for an a.out file. */ |
| 447 | |
| 448 | bfd_boolean |
| 449 | NAME (aout, make_sections) (bfd *abfd) |
| 450 | { |
| 451 | if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) |
| 452 | return FALSE; |
| 453 | if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) |
| 454 | return FALSE; |
| 455 | if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) |
| 456 | return FALSE; |
| 457 | return TRUE; |
| 458 | } |
| 459 | |
| 460 | /* Some a.out variant thinks that the file open in ABFD |
| 461 | checking is an a.out file. Do some more checking, and set up |
| 462 | for access if it really is. Call back to the calling |
| 463 | environment's "finish up" function just before returning, to |
| 464 | handle any last-minute setup. */ |
| 465 | |
| 466 | bfd_cleanup |
| 467 | NAME (aout, some_aout_object_p) (bfd *abfd, |
| 468 | struct internal_exec *execp, |
| 469 | bfd_cleanup (*callback_to_real_object_p) (bfd *)) |
| 470 | { |
| 471 | struct aout_data_struct *rawptr, *oldrawptr; |
| 472 | bfd_cleanup cleanup; |
| 473 | size_t amt = sizeof (struct aout_data_struct); |
| 474 | |
| 475 | rawptr = bfd_zalloc (abfd, amt); |
| 476 | if (rawptr == NULL) |
| 477 | return 0; |
| 478 | |
| 479 | oldrawptr = abfd->tdata.aout_data; |
| 480 | abfd->tdata.aout_data = rawptr; |
| 481 | |
| 482 | /* Copy the contents of the old tdata struct. */ |
| 483 | if (oldrawptr != NULL) |
| 484 | *abfd->tdata.aout_data = *oldrawptr; |
| 485 | |
| 486 | abfd->tdata.aout_data->a.hdr = &rawptr->e; |
| 487 | *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct. */ |
| 488 | execp = abfd->tdata.aout_data->a.hdr; |
| 489 | |
| 490 | /* Set the file flags. */ |
| 491 | abfd->flags = BFD_NO_FLAGS; |
| 492 | if (execp->a_drsize || execp->a_trsize) |
| 493 | abfd->flags |= HAS_RELOC; |
| 494 | /* Setting of EXEC_P has been deferred to the bottom of this function. */ |
| 495 | if (execp->a_syms) |
| 496 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; |
| 497 | if (N_DYNAMIC (execp)) |
| 498 | abfd->flags |= DYNAMIC; |
| 499 | |
| 500 | if (N_MAGIC (execp) == ZMAGIC) |
| 501 | { |
| 502 | abfd->flags |= D_PAGED | WP_TEXT; |
| 503 | adata (abfd).magic = z_magic; |
| 504 | } |
| 505 | else if (N_MAGIC (execp) == NMAGIC) |
| 506 | { |
| 507 | abfd->flags |= WP_TEXT; |
| 508 | adata (abfd).magic = n_magic; |
| 509 | } |
| 510 | else if (N_MAGIC (execp) == OMAGIC) |
| 511 | adata (abfd).magic = o_magic; |
| 512 | else if (N_MAGIC (execp) == IMAGIC) |
| 513 | adata (abfd).magic = i_magic; |
| 514 | else |
| 515 | { |
| 516 | /* Should have been checked with N_BADMAG before this routine |
| 517 | was called. */ |
| 518 | abort (); |
| 519 | } |
| 520 | |
| 521 | abfd->start_address = execp->a_entry; |
| 522 | |
| 523 | obj_aout_symbols (abfd) = NULL; |
| 524 | abfd->symcount = execp->a_syms / sizeof (struct external_nlist); |
| 525 | |
| 526 | /* The default relocation entry size is that of traditional V7 Unix. */ |
| 527 | obj_reloc_entry_size (abfd) = RELOC_SIZE; |
| 528 | |
| 529 | /* The default symbol entry size is that of traditional Unix. */ |
| 530 | obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; |
| 531 | |
| 532 | #ifdef USE_MMAP |
| 533 | bfd_init_window (&obj_aout_sym_window (abfd)); |
| 534 | bfd_init_window (&obj_aout_string_window (abfd)); |
| 535 | #endif |
| 536 | |
| 537 | obj_aout_external_syms (abfd) = NULL; |
| 538 | obj_aout_external_strings (abfd) = NULL; |
| 539 | obj_aout_sym_hashes (abfd) = NULL; |
| 540 | |
| 541 | if (! NAME (aout, make_sections) (abfd)) |
| 542 | return NULL; |
| 543 | |
| 544 | obj_datasec (abfd)->size = execp->a_data; |
| 545 | obj_bsssec (abfd)->size = execp->a_bss; |
| 546 | |
| 547 | obj_textsec (abfd)->flags = |
| 548 | (execp->a_trsize != 0 |
| 549 | ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) |
| 550 | : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); |
| 551 | obj_datasec (abfd)->flags = |
| 552 | (execp->a_drsize != 0 |
| 553 | ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) |
| 554 | : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); |
| 555 | obj_bsssec (abfd)->flags = SEC_ALLOC; |
| 556 | |
| 557 | #ifdef THIS_IS_ONLY_DOCUMENTATION |
| 558 | /* The common code can't fill in these things because they depend |
| 559 | on either the start address of the text segment, the rounding |
| 560 | up of virtual addresses between segments, or the starting file |
| 561 | position of the text segment -- all of which varies among different |
| 562 | versions of a.out. */ |
| 563 | |
| 564 | /* Call back to the format-dependent code to fill in the rest of the |
| 565 | fields and do any further cleanup. Things that should be filled |
| 566 | in by the callback: */ |
| 567 | struct exec *execp = exec_hdr (abfd); |
| 568 | |
| 569 | obj_textsec (abfd)->size = N_TXTSIZE (execp); |
| 570 | /* Data and bss are already filled in since they're so standard. */ |
| 571 | |
| 572 | /* The virtual memory addresses of the sections. */ |
| 573 | obj_textsec (abfd)->vma = N_TXTADDR (execp); |
| 574 | obj_datasec (abfd)->vma = N_DATADDR (execp); |
| 575 | obj_bsssec (abfd)->vma = N_BSSADDR (execp); |
| 576 | |
| 577 | /* The file offsets of the sections. */ |
| 578 | obj_textsec (abfd)->filepos = N_TXTOFF (execp); |
| 579 | obj_datasec (abfd)->filepos = N_DATOFF (execp); |
| 580 | |
| 581 | /* The file offsets of the relocation info. */ |
| 582 | obj_textsec (abfd)->rel_filepos = N_TRELOFF (execp); |
| 583 | obj_datasec (abfd)->rel_filepos = N_DRELOFF (execp); |
| 584 | |
| 585 | /* The file offsets of the string table and symbol table. */ |
| 586 | obj_str_filepos (abfd) = N_STROFF (execp); |
| 587 | obj_sym_filepos (abfd) = N_SYMOFF (execp); |
| 588 | |
| 589 | /* Determine the architecture and machine type of the object file. */ |
| 590 | abfd->obj_arch = bfd_arch_obscure; |
| 591 | |
| 592 | adata(abfd)->page_size = TARGET_PAGE_SIZE; |
| 593 | adata(abfd)->segment_size = SEGMENT_SIZE; |
| 594 | adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; |
| 595 | |
| 596 | return _bfd_no_cleanup; |
| 597 | |
| 598 | /* The architecture is encoded in various ways in various a.out variants, |
| 599 | or is not encoded at all in some of them. The relocation size depends |
| 600 | on the architecture and the a.out variant. Finally, the return value |
| 601 | is the bfd_target vector in use. If an error occurs, return zero and |
| 602 | set bfd_error to the appropriate error code. |
| 603 | |
| 604 | Formats such as b.out, which have additional fields in the a.out |
| 605 | header, should cope with them in this callback as well. */ |
| 606 | #endif /* DOCUMENTATION */ |
| 607 | |
| 608 | cleanup = (*callback_to_real_object_p)(abfd); |
| 609 | |
| 610 | /* Now that the segment addresses have been worked out, take a better |
| 611 | guess at whether the file is executable. If the entry point |
| 612 | is within the text segment, assume it is. (This makes files |
| 613 | executable even if their entry point address is 0, as long as |
| 614 | their text starts at zero.). |
| 615 | |
| 616 | This test had to be changed to deal with systems where the text segment |
| 617 | runs at a different location than the default. The problem is that the |
| 618 | entry address can appear to be outside the text segment, thus causing an |
| 619 | erroneous conclusion that the file isn't executable. |
| 620 | |
| 621 | To fix this, we now accept any non-zero entry point as an indication of |
| 622 | executability. This will work most of the time, since only the linker |
| 623 | sets the entry point, and that is likely to be non-zero for most systems. */ |
| 624 | |
| 625 | if (execp->a_entry != 0 |
| 626 | || (execp->a_entry >= obj_textsec (abfd)->vma |
| 627 | && execp->a_entry < (obj_textsec (abfd)->vma |
| 628 | + obj_textsec (abfd)->size) |
| 629 | && execp->a_trsize == 0 |
| 630 | && execp->a_drsize == 0)) |
| 631 | abfd->flags |= EXEC_P; |
| 632 | #ifdef STAT_FOR_EXEC |
| 633 | else |
| 634 | { |
| 635 | struct stat stat_buf; |
| 636 | |
| 637 | /* The original heuristic doesn't work in some important cases. |
| 638 | The a.out file has no information about the text start |
| 639 | address. For files (like kernels) linked to non-standard |
| 640 | addresses (ld -Ttext nnn) the entry point may not be between |
| 641 | the default text start (obj_textsec(abfd)->vma) and |
| 642 | (obj_textsec(abfd)->vma) + text size. This is not just a mach |
| 643 | issue. Many kernels are loaded at non standard addresses. */ |
| 644 | if (abfd->iostream != NULL |
| 645 | && (abfd->flags & BFD_IN_MEMORY) == 0 |
| 646 | && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) |
| 647 | && ((stat_buf.st_mode & 0111) != 0)) |
| 648 | abfd->flags |= EXEC_P; |
| 649 | } |
| 650 | #endif /* STAT_FOR_EXEC */ |
| 651 | |
| 652 | if (!cleanup) |
| 653 | { |
| 654 | free (rawptr); |
| 655 | abfd->tdata.aout_data = oldrawptr; |
| 656 | } |
| 657 | return cleanup; |
| 658 | } |
| 659 | |
| 660 | /* Initialize ABFD for use with a.out files. */ |
| 661 | |
| 662 | bfd_boolean |
| 663 | NAME (aout, mkobject) (bfd *abfd) |
| 664 | { |
| 665 | struct aout_data_struct *rawptr; |
| 666 | size_t amt = sizeof (struct aout_data_struct); |
| 667 | |
| 668 | bfd_set_error (bfd_error_system_call); |
| 669 | |
| 670 | /* Use an intermediate variable for clarity. */ |
| 671 | rawptr = bfd_zalloc (abfd, amt); |
| 672 | |
| 673 | if (rawptr == NULL) |
| 674 | return FALSE; |
| 675 | |
| 676 | abfd->tdata.aout_data = rawptr; |
| 677 | exec_hdr (abfd) = &(rawptr->e); |
| 678 | |
| 679 | obj_textsec (abfd) = NULL; |
| 680 | obj_datasec (abfd) = NULL; |
| 681 | obj_bsssec (abfd) = NULL; |
| 682 | |
| 683 | return TRUE; |
| 684 | } |
| 685 | |
| 686 | /* Keep track of machine architecture and machine type for |
| 687 | a.out's. Return the <<machine_type>> for a particular |
| 688 | architecture and machine, or <<M_UNKNOWN>> if that exact architecture |
| 689 | and machine can't be represented in a.out format. |
| 690 | |
| 691 | If the architecture is understood, machine type 0 (default) |
| 692 | is always understood. */ |
| 693 | |
| 694 | enum machine_type |
| 695 | NAME (aout, machine_type) (enum bfd_architecture arch, |
| 696 | unsigned long machine, |
| 697 | bfd_boolean *unknown) |
| 698 | { |
| 699 | enum machine_type arch_flags; |
| 700 | |
| 701 | arch_flags = M_UNKNOWN; |
| 702 | *unknown = TRUE; |
| 703 | |
| 704 | switch (arch) |
| 705 | { |
| 706 | case bfd_arch_sparc: |
| 707 | if (machine == 0 |
| 708 | || machine == bfd_mach_sparc |
| 709 | || machine == bfd_mach_sparc_sparclite |
| 710 | || machine == bfd_mach_sparc_v9) |
| 711 | arch_flags = M_SPARC; |
| 712 | else if (machine == bfd_mach_sparc_sparclet) |
| 713 | arch_flags = M_SPARCLET; |
| 714 | break; |
| 715 | |
| 716 | case bfd_arch_i386: |
| 717 | if (machine == 0 |
| 718 | || machine == bfd_mach_i386_i386 |
| 719 | || machine == bfd_mach_i386_i386_intel_syntax) |
| 720 | arch_flags = M_386; |
| 721 | break; |
| 722 | |
| 723 | case bfd_arch_arm: |
| 724 | if (machine == 0) arch_flags = M_ARM; |
| 725 | break; |
| 726 | |
| 727 | case bfd_arch_mips: |
| 728 | switch (machine) |
| 729 | { |
| 730 | case 0: |
| 731 | case 2000: |
| 732 | case bfd_mach_mips3000: |
| 733 | arch_flags = M_MIPS1; |
| 734 | break; |
| 735 | case bfd_mach_mips4000: /* MIPS3 */ |
| 736 | case bfd_mach_mips4400: |
| 737 | case bfd_mach_mips8000: /* MIPS4 */ |
| 738 | case bfd_mach_mips6000: /* Real MIPS2: */ |
| 739 | arch_flags = M_MIPS2; |
| 740 | break; |
| 741 | default: |
| 742 | arch_flags = M_UNKNOWN; |
| 743 | break; |
| 744 | } |
| 745 | break; |
| 746 | |
| 747 | case bfd_arch_ns32k: |
| 748 | switch (machine) |
| 749 | { |
| 750 | case 0: arch_flags = M_NS32532; break; |
| 751 | case 32032: arch_flags = M_NS32032; break; |
| 752 | case 32532: arch_flags = M_NS32532; break; |
| 753 | default: arch_flags = M_UNKNOWN; break; |
| 754 | } |
| 755 | break; |
| 756 | |
| 757 | case bfd_arch_pdp11: |
| 758 | /* TODO: arch_flags = M_PDP11; */ |
| 759 | *unknown = FALSE; |
| 760 | break; |
| 761 | |
| 762 | case bfd_arch_vax: |
| 763 | *unknown = FALSE; |
| 764 | break; |
| 765 | |
| 766 | default: |
| 767 | arch_flags = M_UNKNOWN; |
| 768 | } |
| 769 | |
| 770 | if (arch_flags != M_UNKNOWN) |
| 771 | *unknown = FALSE; |
| 772 | |
| 773 | return arch_flags; |
| 774 | } |
| 775 | |
| 776 | /* Set the architecture and the machine of the ABFD to the |
| 777 | values ARCH and MACHINE. Verify that @ABFD's format |
| 778 | can support the architecture required. */ |
| 779 | |
| 780 | bfd_boolean |
| 781 | NAME (aout, set_arch_mach) (bfd *abfd, |
| 782 | enum bfd_architecture arch, |
| 783 | unsigned long machine) |
| 784 | { |
| 785 | if (! bfd_default_set_arch_mach (abfd, arch, machine)) |
| 786 | return FALSE; |
| 787 | |
| 788 | if (arch != bfd_arch_unknown) |
| 789 | { |
| 790 | bfd_boolean unknown; |
| 791 | |
| 792 | NAME (aout, machine_type) (arch, machine, &unknown); |
| 793 | if (unknown) |
| 794 | return FALSE; |
| 795 | } |
| 796 | |
| 797 | obj_reloc_entry_size (abfd) = RELOC_SIZE; |
| 798 | |
| 799 | return (*aout_backend_info(abfd)->set_sizes) (abfd); |
| 800 | } |
| 801 | |
| 802 | static void |
| 803 | adjust_o_magic (bfd *abfd, struct internal_exec *execp) |
| 804 | { |
| 805 | file_ptr pos = adata (abfd).exec_bytes_size; |
| 806 | bfd_vma vma = 0; |
| 807 | int pad = 0; |
| 808 | asection *text = obj_textsec (abfd); |
| 809 | asection *data = obj_datasec (abfd); |
| 810 | asection *bss = obj_bsssec (abfd); |
| 811 | |
| 812 | /* Text. */ |
| 813 | text->filepos = pos; |
| 814 | if (!text->user_set_vma) |
| 815 | text->vma = vma; |
| 816 | else |
| 817 | vma = text->vma; |
| 818 | |
| 819 | pos += execp->a_text; |
| 820 | vma += execp->a_text; |
| 821 | |
| 822 | /* Data. */ |
| 823 | if (!data->user_set_vma) |
| 824 | { |
| 825 | pos += pad; |
| 826 | vma += pad; |
| 827 | data->vma = vma; |
| 828 | } |
| 829 | else |
| 830 | vma = data->vma; |
| 831 | execp->a_text += pad; |
| 832 | |
| 833 | data->filepos = pos; |
| 834 | pos += data->size; |
| 835 | vma += data->size; |
| 836 | |
| 837 | /* BSS. */ |
| 838 | if (!bss->user_set_vma) |
| 839 | { |
| 840 | pos += pad; |
| 841 | vma += pad; |
| 842 | bss->vma = vma; |
| 843 | } |
| 844 | else if (data->size > 0 || bss->size > 0) /* PR25677: for objcopy --extract-symbol */ |
| 845 | { |
| 846 | /* The VMA of the .bss section is set by the VMA of the |
| 847 | .data section plus the size of the .data section. We may |
| 848 | need to add padding bytes to make this true. */ |
| 849 | pad = bss->vma - vma; |
| 850 | if (pad < 0) |
| 851 | pad = 0; |
| 852 | pos += pad; |
| 853 | } |
| 854 | execp->a_data = data->size + pad; |
| 855 | bss->filepos = pos; |
| 856 | execp->a_bss = bss->size; |
| 857 | |
| 858 | N_SET_MAGIC (execp, OMAGIC); |
| 859 | } |
| 860 | |
| 861 | static void |
| 862 | adjust_z_magic (bfd *abfd, struct internal_exec *execp) |
| 863 | { |
| 864 | bfd_size_type data_pad, text_pad; |
| 865 | file_ptr text_end; |
| 866 | const struct aout_backend_data *abdp; |
| 867 | /* TRUE if text includes exec header. */ |
| 868 | bfd_boolean ztih; |
| 869 | asection *text = obj_textsec (abfd); |
| 870 | asection *data = obj_datasec (abfd); |
| 871 | asection *bss = obj_bsssec (abfd); |
| 872 | |
| 873 | abdp = aout_backend_info (abfd); |
| 874 | |
| 875 | /* Text. */ |
| 876 | ztih = (abdp != NULL |
| 877 | && (abdp->text_includes_header |
| 878 | || obj_aout_subformat (abfd) == q_magic_format)); |
| 879 | text->filepos = (ztih |
| 880 | ? adata (abfd).exec_bytes_size |
| 881 | : adata (abfd).zmagic_disk_block_size); |
| 882 | if (!text->user_set_vma) |
| 883 | { |
| 884 | /* ?? Do we really need to check for relocs here? */ |
| 885 | text->vma = ((abfd->flags & HAS_RELOC) |
| 886 | ? 0 |
| 887 | : (ztih |
| 888 | ? abdp->default_text_vma + adata (abfd).exec_bytes_size |
| 889 | : abdp->default_text_vma)); |
| 890 | text_pad = 0; |
| 891 | } |
| 892 | else |
| 893 | { |
| 894 | /* The .text section is being loaded at an unusual address. We |
| 895 | may need to pad it such that the .data section starts at a page |
| 896 | boundary. */ |
| 897 | if (ztih) |
| 898 | text_pad = ((text->filepos - text->vma) |
| 899 | & (adata (abfd).page_size - 1)); |
| 900 | else |
| 901 | text_pad = (-text->vma |
| 902 | & (adata (abfd).page_size - 1)); |
| 903 | } |
| 904 | |
| 905 | /* Find start of data. */ |
| 906 | if (ztih) |
| 907 | { |
| 908 | text_end = text->filepos + execp->a_text; |
| 909 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; |
| 910 | } |
| 911 | else |
| 912 | { |
| 913 | /* Note that if page_size == zmagic_disk_block_size, then |
| 914 | filepos == page_size, and this case is the same as the ztih |
| 915 | case. */ |
| 916 | text_end = execp->a_text; |
| 917 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; |
| 918 | text_end += text->filepos; |
| 919 | } |
| 920 | execp->a_text += text_pad; |
| 921 | |
| 922 | /* Data. */ |
| 923 | if (!data->user_set_vma) |
| 924 | { |
| 925 | bfd_vma vma; |
| 926 | vma = text->vma + execp->a_text; |
| 927 | data->vma = BFD_ALIGN (vma, adata (abfd).segment_size); |
| 928 | } |
| 929 | if (abdp && abdp->zmagic_mapped_contiguous) |
| 930 | { |
| 931 | text_pad = data->vma - (text->vma + execp->a_text); |
| 932 | /* Only pad the text section if the data |
| 933 | section is going to be placed after it. */ |
| 934 | if (text_pad > 0) |
| 935 | execp->a_text += text_pad; |
| 936 | } |
| 937 | data->filepos = text->filepos + execp->a_text; |
| 938 | |
| 939 | /* Fix up exec header while we're at it. */ |
| 940 | if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) |
| 941 | execp->a_text += adata (abfd).exec_bytes_size; |
| 942 | N_SET_MAGIC (execp, ZMAGIC); |
| 943 | |
| 944 | /* Spec says data section should be rounded up to page boundary. */ |
| 945 | execp->a_data = align_power (data->size, bss->alignment_power); |
| 946 | execp->a_data = BFD_ALIGN (execp->a_data, adata (abfd).page_size); |
| 947 | data_pad = execp->a_data - data->size; |
| 948 | |
| 949 | /* BSS. */ |
| 950 | if (!bss->user_set_vma) |
| 951 | bss->vma = data->vma + execp->a_data; |
| 952 | /* If the BSS immediately follows the data section and extra space |
| 953 | in the page is left after the data section, fudge data |
| 954 | in the header so that the bss section looks smaller by that |
| 955 | amount. We'll start the bss section there, and lie to the OS. |
| 956 | (Note that a linker script, as well as the above assignment, |
| 957 | could have explicitly set the BSS vma to immediately follow |
| 958 | the data section.) */ |
| 959 | if (align_power (bss->vma, bss->alignment_power) == data->vma + execp->a_data) |
| 960 | execp->a_bss = data_pad > bss->size ? 0 : bss->size - data_pad; |
| 961 | else |
| 962 | execp->a_bss = bss->size; |
| 963 | } |
| 964 | |
| 965 | static void |
| 966 | adjust_n_magic (bfd *abfd, struct internal_exec *execp) |
| 967 | { |
| 968 | file_ptr pos = adata (abfd).exec_bytes_size; |
| 969 | bfd_vma vma = 0; |
| 970 | int pad; |
| 971 | asection *text = obj_textsec (abfd); |
| 972 | asection *data = obj_datasec (abfd); |
| 973 | asection *bss = obj_bsssec (abfd); |
| 974 | |
| 975 | /* Text. */ |
| 976 | text->filepos = pos; |
| 977 | if (!text->user_set_vma) |
| 978 | text->vma = vma; |
| 979 | else |
| 980 | vma = text->vma; |
| 981 | pos += execp->a_text; |
| 982 | vma += execp->a_text; |
| 983 | |
| 984 | /* Data. */ |
| 985 | data->filepos = pos; |
| 986 | if (!data->user_set_vma) |
| 987 | data->vma = BFD_ALIGN (vma, adata (abfd).segment_size); |
| 988 | vma = data->vma; |
| 989 | |
| 990 | /* Since BSS follows data immediately, see if it needs alignment. */ |
| 991 | vma += data->size; |
| 992 | pad = align_power (vma, bss->alignment_power) - vma; |
| 993 | execp->a_data = data->size + pad; |
| 994 | pos += execp->a_data; |
| 995 | |
| 996 | /* BSS. */ |
| 997 | if (!bss->user_set_vma) |
| 998 | bss->vma = vma; |
| 999 | else |
| 1000 | vma = bss->vma; |
| 1001 | |
| 1002 | /* Fix up exec header. */ |
| 1003 | execp->a_bss = bss->size; |
| 1004 | N_SET_MAGIC (execp, NMAGIC); |
| 1005 | } |
| 1006 | |
| 1007 | static void |
| 1008 | adjust_i_magic (bfd *abfd, struct internal_exec *execp) |
| 1009 | { |
| 1010 | file_ptr pos = adata (abfd).exec_bytes_size; |
| 1011 | bfd_vma vma = 0; |
| 1012 | int pad; |
| 1013 | asection *text = obj_textsec (abfd); |
| 1014 | asection *data = obj_datasec (abfd); |
| 1015 | asection *bss = obj_bsssec (abfd); |
| 1016 | |
| 1017 | /* Text. */ |
| 1018 | text->filepos = pos; |
| 1019 | if (!text->user_set_vma) |
| 1020 | text->vma = vma; |
| 1021 | else |
| 1022 | vma = text->vma; |
| 1023 | pos += execp->a_text; |
| 1024 | |
| 1025 | /* Data. */ |
| 1026 | data->filepos = pos; |
| 1027 | if (!data->user_set_vma) |
| 1028 | data->vma = 0; |
| 1029 | vma = data->vma; |
| 1030 | |
| 1031 | /* Since BSS follows data immediately, see if it needs alignment. */ |
| 1032 | vma += data->size; |
| 1033 | pad = align_power (vma, bss->alignment_power) - vma; |
| 1034 | execp->a_data = data->size + pad; |
| 1035 | pos += execp->a_data; |
| 1036 | |
| 1037 | /* BSS. */ |
| 1038 | if (!bss->user_set_vma) |
| 1039 | bss->vma = vma; |
| 1040 | else |
| 1041 | vma = bss->vma; |
| 1042 | |
| 1043 | /* Fix up exec header. */ |
| 1044 | execp->a_bss = bss->size; |
| 1045 | N_SET_MAGIC (execp, IMAGIC); |
| 1046 | } |
| 1047 | |
| 1048 | bfd_boolean |
| 1049 | NAME (aout, adjust_sizes_and_vmas) (bfd *abfd) |
| 1050 | { |
| 1051 | struct internal_exec *execp = exec_hdr (abfd); |
| 1052 | |
| 1053 | if (! NAME (aout, make_sections) (abfd)) |
| 1054 | return FALSE; |
| 1055 | |
| 1056 | if (adata (abfd).magic != undecided_magic) |
| 1057 | return TRUE; |
| 1058 | |
| 1059 | execp->a_text = align_power (obj_textsec (abfd)->size, |
| 1060 | obj_textsec (abfd)->alignment_power); |
| 1061 | |
| 1062 | /* Rule (heuristic) for when to pad to a new page. Note that there |
| 1063 | are (at least) two ways demand-paged (ZMAGIC) files have been |
| 1064 | handled. Most Berkeley-based systems start the text segment at |
| 1065 | (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text |
| 1066 | segment right after the exec header; the latter is counted in the |
| 1067 | text segment size, and is paged in by the kernel with the rest of |
| 1068 | the text. */ |
| 1069 | |
| 1070 | /* This perhaps isn't the right way to do this, but made it simpler for me |
| 1071 | to understand enough to implement it. Better would probably be to go |
| 1072 | right from BFD flags to alignment/positioning characteristics. But the |
| 1073 | old code was sloppy enough about handling the flags, and had enough |
| 1074 | other magic, that it was a little hard for me to understand. I think |
| 1075 | I understand it better now, but I haven't time to do the cleanup this |
| 1076 | minute. */ |
| 1077 | |
| 1078 | if (separate_i_d) |
| 1079 | adata (abfd).magic = i_magic; |
| 1080 | else if (abfd->flags & WP_TEXT) |
| 1081 | adata (abfd).magic = n_magic; |
| 1082 | else |
| 1083 | adata (abfd).magic = o_magic; |
| 1084 | |
| 1085 | #ifdef BFD_AOUT_DEBUG /* requires gcc2 */ |
| 1086 | #if __GNUC__ >= 2 |
| 1087 | fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", |
| 1088 | ({ char *str; |
| 1089 | switch (adata (abfd).magic) |
| 1090 | { |
| 1091 | case n_magic: str = "NMAGIC"; break; |
| 1092 | case o_magic: str = "OMAGIC"; break; |
| 1093 | case i_magic: str = "IMAGIC"; break; |
| 1094 | case z_magic: str = "ZMAGIC"; break; |
| 1095 | default: abort (); |
| 1096 | } |
| 1097 | str; |
| 1098 | }), |
| 1099 | obj_textsec (abfd)->vma, obj_textsec (abfd)->size, |
| 1100 | obj_textsec (abfd)->alignment_power, |
| 1101 | obj_datasec (abfd)->vma, obj_datasec (abfd)->size, |
| 1102 | obj_datasec (abfd)->alignment_power, |
| 1103 | obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size, |
| 1104 | obj_bsssec (abfd)->alignment_power); |
| 1105 | #endif |
| 1106 | #endif |
| 1107 | |
| 1108 | switch (adata (abfd).magic) |
| 1109 | { |
| 1110 | case o_magic: |
| 1111 | adjust_o_magic (abfd, execp); |
| 1112 | break; |
| 1113 | case z_magic: |
| 1114 | adjust_z_magic (abfd, execp); |
| 1115 | break; |
| 1116 | case n_magic: |
| 1117 | adjust_n_magic (abfd, execp); |
| 1118 | break; |
| 1119 | case i_magic: |
| 1120 | adjust_i_magic (abfd, execp); |
| 1121 | break; |
| 1122 | default: |
| 1123 | abort (); |
| 1124 | } |
| 1125 | |
| 1126 | #ifdef BFD_AOUT_DEBUG |
| 1127 | fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", |
| 1128 | obj_textsec (abfd)->vma, execp->a_text, |
| 1129 | obj_textsec (abfd)->filepos, |
| 1130 | obj_datasec (abfd)->vma, execp->a_data, |
| 1131 | obj_datasec (abfd)->filepos, |
| 1132 | obj_bsssec (abfd)->vma, execp->a_bss); |
| 1133 | #endif |
| 1134 | |
| 1135 | return TRUE; |
| 1136 | } |
| 1137 | |
| 1138 | /* Called by the BFD in response to a bfd_make_section request. */ |
| 1139 | |
| 1140 | bfd_boolean |
| 1141 | NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) |
| 1142 | { |
| 1143 | /* Align to double at least. */ |
| 1144 | newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; |
| 1145 | |
| 1146 | if (bfd_get_format (abfd) == bfd_object) |
| 1147 | { |
| 1148 | if (obj_textsec (abfd) == NULL |
| 1149 | && !strcmp (newsect->name, ".text")) |
| 1150 | { |
| 1151 | obj_textsec(abfd)= newsect; |
| 1152 | newsect->target_index = N_TEXT; |
| 1153 | } |
| 1154 | else if (obj_datasec (abfd) == NULL |
| 1155 | && !strcmp (newsect->name, ".data")) |
| 1156 | { |
| 1157 | obj_datasec (abfd) = newsect; |
| 1158 | newsect->target_index = N_DATA; |
| 1159 | } |
| 1160 | else if (obj_bsssec (abfd) == NULL |
| 1161 | && !strcmp (newsect->name, ".bss")) |
| 1162 | { |
| 1163 | obj_bsssec (abfd) = newsect; |
| 1164 | newsect->target_index = N_BSS; |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | /* We allow more than three sections internally. */ |
| 1169 | return _bfd_generic_new_section_hook (abfd, newsect); |
| 1170 | } |
| 1171 | |
| 1172 | bfd_boolean |
| 1173 | NAME (aout, set_section_contents) (bfd *abfd, |
| 1174 | sec_ptr section, |
| 1175 | const void * location, |
| 1176 | file_ptr offset, |
| 1177 | bfd_size_type count) |
| 1178 | { |
| 1179 | if (! abfd->output_has_begun) |
| 1180 | { |
| 1181 | if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) |
| 1182 | return FALSE; |
| 1183 | } |
| 1184 | |
| 1185 | if (section == obj_bsssec (abfd)) |
| 1186 | { |
| 1187 | bfd_set_error (bfd_error_no_contents); |
| 1188 | return FALSE; |
| 1189 | } |
| 1190 | |
| 1191 | if (section != obj_textsec (abfd) |
| 1192 | && section != obj_datasec (abfd)) |
| 1193 | { |
| 1194 | _bfd_error_handler |
| 1195 | /* xgettext:c-format */ |
| 1196 | (_("%pB: can not represent section `%pA' in a.out object file format"), |
| 1197 | abfd, section); |
| 1198 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 1199 | return FALSE; |
| 1200 | } |
| 1201 | |
| 1202 | if (count != 0) |
| 1203 | { |
| 1204 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 |
| 1205 | || bfd_bwrite (location, count, abfd) != count) |
| 1206 | return FALSE; |
| 1207 | } |
| 1208 | |
| 1209 | return TRUE; |
| 1210 | } |
| 1211 | \f |
| 1212 | /* Read the external symbols from an a.out file. */ |
| 1213 | |
| 1214 | static bfd_boolean |
| 1215 | aout_get_external_symbols (bfd *abfd) |
| 1216 | { |
| 1217 | if (obj_aout_external_syms (abfd) == NULL) |
| 1218 | { |
| 1219 | bfd_size_type count; |
| 1220 | struct external_nlist *syms; |
| 1221 | |
| 1222 | count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; |
| 1223 | |
| 1224 | /* PR 17512: file: 011f5a08. */ |
| 1225 | if (count == 0) |
| 1226 | { |
| 1227 | obj_aout_external_syms (abfd) = NULL; |
| 1228 | obj_aout_external_sym_count (abfd) = count; |
| 1229 | return TRUE; |
| 1230 | } |
| 1231 | |
| 1232 | #ifdef USE_MMAP |
| 1233 | if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), |
| 1234 | exec_hdr (abfd)->a_syms, |
| 1235 | &obj_aout_sym_window (abfd), TRUE)) |
| 1236 | return FALSE; |
| 1237 | syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; |
| 1238 | #else |
| 1239 | /* We allocate using malloc to make the values easy to free |
| 1240 | later on. If we put them on the objalloc it might not be |
| 1241 | possible to free them. */ |
| 1242 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
| 1243 | return FALSE; |
| 1244 | syms = (struct external_nlist *) |
| 1245 | _bfd_malloc_and_read (abfd, count * EXTERNAL_NLIST_SIZE, |
| 1246 | count * EXTERNAL_NLIST_SIZE); |
| 1247 | if (syms == NULL) |
| 1248 | return FALSE; |
| 1249 | #endif |
| 1250 | |
| 1251 | obj_aout_external_syms (abfd) = syms; |
| 1252 | obj_aout_external_sym_count (abfd) = count; |
| 1253 | } |
| 1254 | |
| 1255 | if (obj_aout_external_strings (abfd) == NULL |
| 1256 | && exec_hdr (abfd)->a_syms != 0) |
| 1257 | { |
| 1258 | unsigned char string_chars[BYTES_IN_LONG]; |
| 1259 | bfd_size_type stringsize; |
| 1260 | char *strings; |
| 1261 | bfd_size_type amt = BYTES_IN_LONG; |
| 1262 | |
| 1263 | /* Get the size of the strings. */ |
| 1264 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 |
| 1265 | || bfd_bread ((void *) string_chars, amt, abfd) != amt) |
| 1266 | return FALSE; |
| 1267 | stringsize = H_GET_32 (abfd, string_chars); |
| 1268 | if (stringsize == 0) |
| 1269 | stringsize = 1; |
| 1270 | else if (stringsize < BYTES_IN_LONG |
| 1271 | || (size_t) stringsize != stringsize) |
| 1272 | { |
| 1273 | bfd_set_error (bfd_error_bad_value); |
| 1274 | return FALSE; |
| 1275 | } |
| 1276 | |
| 1277 | #ifdef USE_MMAP |
| 1278 | if (stringsize >= BYTES_IN_LONG) |
| 1279 | { |
| 1280 | if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize + 1, |
| 1281 | &obj_aout_string_window (abfd), TRUE)) |
| 1282 | return FALSE; |
| 1283 | strings = (char *) obj_aout_string_window (abfd).data; |
| 1284 | } |
| 1285 | else |
| 1286 | #endif |
| 1287 | { |
| 1288 | strings = (char *) bfd_malloc (stringsize + 1); |
| 1289 | if (strings == NULL) |
| 1290 | return FALSE; |
| 1291 | |
| 1292 | if (stringsize >= BYTES_IN_LONG) |
| 1293 | { |
| 1294 | /* Keep the string count in the buffer for convenience |
| 1295 | when indexing with e_strx. */ |
| 1296 | amt = stringsize - BYTES_IN_LONG; |
| 1297 | if (bfd_bread (strings + BYTES_IN_LONG, amt, abfd) != amt) |
| 1298 | { |
| 1299 | free (strings); |
| 1300 | return FALSE; |
| 1301 | } |
| 1302 | } |
| 1303 | } |
| 1304 | /* Ensure that a zero index yields an empty string. */ |
| 1305 | strings[0] = '\0'; |
| 1306 | |
| 1307 | /* Ensure that the string buffer is NUL terminated. */ |
| 1308 | strings[stringsize] = 0; |
| 1309 | |
| 1310 | obj_aout_external_strings (abfd) = strings; |
| 1311 | obj_aout_external_string_size (abfd) = stringsize; |
| 1312 | } |
| 1313 | |
| 1314 | return TRUE; |
| 1315 | } |
| 1316 | |
| 1317 | /* Translate an a.out symbol into a BFD symbol. The desc, other, type |
| 1318 | and symbol->value fields of CACHE_PTR will be set from the a.out |
| 1319 | nlist structure. This function is responsible for setting |
| 1320 | symbol->flags and symbol->section, and adjusting symbol->value. */ |
| 1321 | |
| 1322 | static bfd_boolean |
| 1323 | translate_from_native_sym_flags (bfd *abfd, |
| 1324 | aout_symbol_type *cache_ptr) |
| 1325 | { |
| 1326 | flagword visible; |
| 1327 | |
| 1328 | if (cache_ptr->type == N_FN) |
| 1329 | { |
| 1330 | asection *sec; |
| 1331 | |
| 1332 | /* This is a debugging symbol. */ |
| 1333 | cache_ptr->symbol.flags = BSF_DEBUGGING; |
| 1334 | |
| 1335 | /* Work out the symbol section. */ |
| 1336 | switch (cache_ptr->type & N_TYPE) |
| 1337 | { |
| 1338 | case N_TEXT: |
| 1339 | case N_FN: |
| 1340 | sec = obj_textsec (abfd); |
| 1341 | break; |
| 1342 | case N_DATA: |
| 1343 | sec = obj_datasec (abfd); |
| 1344 | break; |
| 1345 | case N_BSS: |
| 1346 | sec = obj_bsssec (abfd); |
| 1347 | break; |
| 1348 | default: |
| 1349 | case N_ABS: |
| 1350 | sec = bfd_abs_section_ptr; |
| 1351 | break; |
| 1352 | } |
| 1353 | |
| 1354 | cache_ptr->symbol.section = sec; |
| 1355 | cache_ptr->symbol.value -= sec->vma; |
| 1356 | |
| 1357 | return TRUE; |
| 1358 | } |
| 1359 | |
| 1360 | /* Get the default visibility. This does not apply to all types, so |
| 1361 | we just hold it in a local variable to use if wanted. */ |
| 1362 | if ((cache_ptr->type & N_EXT) == 0) |
| 1363 | visible = BSF_LOCAL; |
| 1364 | else |
| 1365 | visible = BSF_GLOBAL; |
| 1366 | |
| 1367 | switch (cache_ptr->type) |
| 1368 | { |
| 1369 | default: |
| 1370 | case N_ABS: case N_ABS | N_EXT: |
| 1371 | cache_ptr->symbol.section = bfd_abs_section_ptr; |
| 1372 | cache_ptr->symbol.flags = visible; |
| 1373 | break; |
| 1374 | |
| 1375 | case N_UNDF | N_EXT: |
| 1376 | if (cache_ptr->symbol.value != 0) |
| 1377 | { |
| 1378 | /* This is a common symbol. */ |
| 1379 | cache_ptr->symbol.flags = BSF_GLOBAL; |
| 1380 | cache_ptr->symbol.section = bfd_com_section_ptr; |
| 1381 | } |
| 1382 | else |
| 1383 | { |
| 1384 | cache_ptr->symbol.flags = 0; |
| 1385 | cache_ptr->symbol.section = bfd_und_section_ptr; |
| 1386 | } |
| 1387 | break; |
| 1388 | |
| 1389 | case N_TEXT: case N_TEXT | N_EXT: |
| 1390 | cache_ptr->symbol.section = obj_textsec (abfd); |
| 1391 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; |
| 1392 | cache_ptr->symbol.flags = visible; |
| 1393 | break; |
| 1394 | |
| 1395 | case N_DATA: case N_DATA | N_EXT: |
| 1396 | cache_ptr->symbol.section = obj_datasec (abfd); |
| 1397 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; |
| 1398 | cache_ptr->symbol.flags = visible; |
| 1399 | break; |
| 1400 | |
| 1401 | case N_BSS: case N_BSS | N_EXT: |
| 1402 | cache_ptr->symbol.section = obj_bsssec (abfd); |
| 1403 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; |
| 1404 | cache_ptr->symbol.flags = visible; |
| 1405 | break; |
| 1406 | } |
| 1407 | |
| 1408 | return TRUE; |
| 1409 | } |
| 1410 | |
| 1411 | /* Set the fields of SYM_POINTER according to CACHE_PTR. */ |
| 1412 | |
| 1413 | static bfd_boolean |
| 1414 | translate_to_native_sym_flags (bfd *abfd, |
| 1415 | asymbol *cache_ptr, |
| 1416 | struct external_nlist *sym_pointer) |
| 1417 | { |
| 1418 | bfd_vma value = cache_ptr->value; |
| 1419 | asection *sec; |
| 1420 | bfd_vma off; |
| 1421 | |
| 1422 | /* Mask out any existing type bits in case copying from one section |
| 1423 | to another. */ |
| 1424 | sym_pointer->e_type[0] &= ~N_TYPE; |
| 1425 | |
| 1426 | sec = bfd_asymbol_section (cache_ptr); |
| 1427 | off = 0; |
| 1428 | |
| 1429 | if (sec == NULL) |
| 1430 | { |
| 1431 | /* This case occurs, e.g., for the *DEBUG* section of a COFF |
| 1432 | file. */ |
| 1433 | _bfd_error_handler |
| 1434 | /* xgettext:c-format */ |
| 1435 | (_("%pB: can not represent section for symbol `%s' in a.out object file format"), |
| 1436 | abfd, cache_ptr->name != NULL ? cache_ptr->name : "*unknown*"); |
| 1437 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 1438 | return FALSE; |
| 1439 | } |
| 1440 | |
| 1441 | if (sec->output_section != NULL) |
| 1442 | { |
| 1443 | off = sec->output_offset; |
| 1444 | sec = sec->output_section; |
| 1445 | } |
| 1446 | |
| 1447 | if (bfd_is_abs_section (sec)) |
| 1448 | sym_pointer->e_type[0] |= N_ABS; |
| 1449 | else if (sec == obj_textsec (abfd)) |
| 1450 | sym_pointer->e_type[0] |= N_TEXT; |
| 1451 | else if (sec == obj_datasec (abfd)) |
| 1452 | sym_pointer->e_type[0] |= N_DATA; |
| 1453 | else if (sec == obj_bsssec (abfd)) |
| 1454 | sym_pointer->e_type[0] |= N_BSS; |
| 1455 | else if (bfd_is_und_section (sec)) |
| 1456 | sym_pointer->e_type[0] = N_UNDF | N_EXT; |
| 1457 | else if (bfd_is_com_section (sec)) |
| 1458 | sym_pointer->e_type[0] = N_UNDF | N_EXT; |
| 1459 | else |
| 1460 | { |
| 1461 | _bfd_error_handler |
| 1462 | /* xgettext:c-format */ |
| 1463 | (_("%pB: can not represent section `%pA' in a.out object file format"), |
| 1464 | abfd, sec); |
| 1465 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 1466 | return FALSE; |
| 1467 | } |
| 1468 | |
| 1469 | /* Turn the symbol from section relative to absolute again */ |
| 1470 | value += sec->vma + off; |
| 1471 | |
| 1472 | if ((cache_ptr->flags & BSF_DEBUGGING) != 0) |
| 1473 | sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; |
| 1474 | else if ((cache_ptr->flags & BSF_GLOBAL) != 0) |
| 1475 | sym_pointer->e_type[0] |= N_EXT; |
| 1476 | |
| 1477 | PUT_WORD(abfd, value, sym_pointer->e_value); |
| 1478 | |
| 1479 | return TRUE; |
| 1480 | } |
| 1481 | \f |
| 1482 | /* Native-level interface to symbols. */ |
| 1483 | |
| 1484 | asymbol * |
| 1485 | NAME (aout, make_empty_symbol) (bfd *abfd) |
| 1486 | { |
| 1487 | size_t amt = sizeof (aout_symbol_type); |
| 1488 | aout_symbol_type *new_symbol_type = bfd_zalloc (abfd, amt); |
| 1489 | |
| 1490 | if (!new_symbol_type) |
| 1491 | return NULL; |
| 1492 | new_symbol_type->symbol.the_bfd = abfd; |
| 1493 | |
| 1494 | return &new_symbol_type->symbol; |
| 1495 | } |
| 1496 | |
| 1497 | /* Translate a set of internal symbols into external symbols. */ |
| 1498 | |
| 1499 | bfd_boolean |
| 1500 | NAME (aout, translate_symbol_table) (bfd *abfd, |
| 1501 | aout_symbol_type *in, |
| 1502 | struct external_nlist *ext, |
| 1503 | bfd_size_type count, |
| 1504 | char *str, |
| 1505 | bfd_size_type strsize, |
| 1506 | bfd_boolean dynamic) |
| 1507 | { |
| 1508 | struct external_nlist *ext_end; |
| 1509 | |
| 1510 | ext_end = ext + count; |
| 1511 | for (; ext < ext_end; ext++, in++) |
| 1512 | { |
| 1513 | bfd_vma x; |
| 1514 | |
| 1515 | x = GET_WORD (abfd, ext->e_strx); |
| 1516 | in->symbol.the_bfd = abfd; |
| 1517 | |
| 1518 | /* For the normal symbols, the zero index points at the number |
| 1519 | of bytes in the string table but is to be interpreted as the |
| 1520 | null string. For the dynamic symbols, the number of bytes in |
| 1521 | the string table is stored in the __DYNAMIC structure and the |
| 1522 | zero index points at an actual string. */ |
| 1523 | if (x == 0 && ! dynamic) |
| 1524 | in->symbol.name = ""; |
| 1525 | else if (x < strsize) |
| 1526 | in->symbol.name = str + x; |
| 1527 | else |
| 1528 | { |
| 1529 | _bfd_error_handler |
| 1530 | (_("%pB: invalid string offset %" PRIu64 " >= %" PRIu64), |
| 1531 | abfd, (uint64_t) x, (uint64_t) strsize); |
| 1532 | bfd_set_error (bfd_error_bad_value); |
| 1533 | return FALSE; |
| 1534 | } |
| 1535 | |
| 1536 | in->symbol.value = GET_WORD (abfd, ext->e_value); |
| 1537 | /* TODO: is 0 a safe value here? */ |
| 1538 | in->desc = 0; |
| 1539 | in->other = 0; |
| 1540 | in->type = H_GET_8 (abfd, ext->e_type); |
| 1541 | in->symbol.udata.p = NULL; |
| 1542 | |
| 1543 | if (! translate_from_native_sym_flags (abfd, in)) |
| 1544 | return FALSE; |
| 1545 | |
| 1546 | if (dynamic) |
| 1547 | in->symbol.flags |= BSF_DYNAMIC; |
| 1548 | } |
| 1549 | |
| 1550 | return TRUE; |
| 1551 | } |
| 1552 | |
| 1553 | /* We read the symbols into a buffer, which is discarded when this |
| 1554 | function exits. We read the strings into a buffer large enough to |
| 1555 | hold them all plus all the cached symbol entries. */ |
| 1556 | |
| 1557 | bfd_boolean |
| 1558 | NAME (aout, slurp_symbol_table) (bfd *abfd) |
| 1559 | { |
| 1560 | struct external_nlist *old_external_syms; |
| 1561 | aout_symbol_type *cached; |
| 1562 | bfd_size_type cached_size; |
| 1563 | |
| 1564 | /* If there's no work to be done, don't do any. */ |
| 1565 | if (obj_aout_symbols (abfd) != NULL) |
| 1566 | return TRUE; |
| 1567 | |
| 1568 | old_external_syms = obj_aout_external_syms (abfd); |
| 1569 | |
| 1570 | if (! aout_get_external_symbols (abfd)) |
| 1571 | return FALSE; |
| 1572 | |
| 1573 | cached_size = obj_aout_external_sym_count (abfd); |
| 1574 | cached_size *= sizeof (aout_symbol_type); |
| 1575 | cached = bfd_zmalloc (cached_size); |
| 1576 | if (cached == NULL && cached_size != 0) |
| 1577 | return FALSE; |
| 1578 | |
| 1579 | /* Convert from external symbol information to internal. */ |
| 1580 | if (! (NAME (aout, translate_symbol_table) |
| 1581 | (abfd, cached, |
| 1582 | obj_aout_external_syms (abfd), |
| 1583 | obj_aout_external_sym_count (abfd), |
| 1584 | obj_aout_external_strings (abfd), |
| 1585 | obj_aout_external_string_size (abfd), |
| 1586 | FALSE))) |
| 1587 | { |
| 1588 | free (cached); |
| 1589 | return FALSE; |
| 1590 | } |
| 1591 | |
| 1592 | abfd->symcount = obj_aout_external_sym_count (abfd); |
| 1593 | |
| 1594 | obj_aout_symbols (abfd) = cached; |
| 1595 | |
| 1596 | /* It is very likely that anybody who calls this function will not |
| 1597 | want the external symbol information, so if it was allocated |
| 1598 | because of our call to aout_get_external_symbols, we free it up |
| 1599 | right away to save space. */ |
| 1600 | if (old_external_syms == NULL |
| 1601 | && obj_aout_external_syms (abfd) != NULL) |
| 1602 | { |
| 1603 | #ifdef USE_MMAP |
| 1604 | bfd_free_window (&obj_aout_sym_window (abfd)); |
| 1605 | #else |
| 1606 | free (obj_aout_external_syms (abfd)); |
| 1607 | #endif |
| 1608 | obj_aout_external_syms (abfd) = NULL; |
| 1609 | } |
| 1610 | |
| 1611 | return TRUE; |
| 1612 | } |
| 1613 | \f |
| 1614 | /* We use a hash table when writing out symbols so that we only write |
| 1615 | out a particular string once. This helps particularly when the |
| 1616 | linker writes out stabs debugging entries, because each different |
| 1617 | contributing object file tends to have many duplicate stabs |
| 1618 | strings. |
| 1619 | |
| 1620 | This hash table code breaks dbx on SunOS 4.1.3, so we don't do it |
| 1621 | if BFD_TRADITIONAL_FORMAT is set. */ |
| 1622 | |
| 1623 | /* Get the index of a string in a strtab, adding it if it is not |
| 1624 | already present. */ |
| 1625 | |
| 1626 | static inline bfd_size_type |
| 1627 | add_to_stringtab (bfd *abfd, |
| 1628 | struct bfd_strtab_hash *tab, |
| 1629 | const char *str, |
| 1630 | bfd_boolean copy) |
| 1631 | { |
| 1632 | bfd_boolean hash; |
| 1633 | bfd_size_type str_index; |
| 1634 | |
| 1635 | /* An index of 0 always means the empty string. */ |
| 1636 | if (str == 0 || *str == '\0') |
| 1637 | return 0; |
| 1638 | |
| 1639 | /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx |
| 1640 | doesn't understand a hashed string table. */ |
| 1641 | hash = TRUE; |
| 1642 | if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| 1643 | hash = FALSE; |
| 1644 | |
| 1645 | str_index = _bfd_stringtab_add (tab, str, hash, copy); |
| 1646 | |
| 1647 | if (str_index != (bfd_size_type) -1) |
| 1648 | /* Add BYTES_IN_LONG to the return value to account for the |
| 1649 | space taken up by the string table size. */ |
| 1650 | str_index += BYTES_IN_LONG; |
| 1651 | |
| 1652 | return str_index; |
| 1653 | } |
| 1654 | |
| 1655 | /* Write out a strtab. ABFD is already at the right location in the |
| 1656 | file. */ |
| 1657 | |
| 1658 | static bfd_boolean |
| 1659 | emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) |
| 1660 | { |
| 1661 | bfd_byte buffer[BYTES_IN_LONG]; |
| 1662 | |
| 1663 | /* The string table starts with the size. */ |
| 1664 | H_PUT_32 (abfd, _bfd_stringtab_size (tab) + BYTES_IN_LONG, buffer); |
| 1665 | if (bfd_bwrite ((void *) buffer, (bfd_size_type) BYTES_IN_LONG, abfd) |
| 1666 | != BYTES_IN_LONG) |
| 1667 | return FALSE; |
| 1668 | |
| 1669 | return _bfd_stringtab_emit (abfd, tab); |
| 1670 | } |
| 1671 | \f |
| 1672 | bfd_boolean |
| 1673 | NAME (aout, write_syms) (bfd *abfd) |
| 1674 | { |
| 1675 | unsigned int count ; |
| 1676 | asymbol **generic = bfd_get_outsymbols (abfd); |
| 1677 | struct bfd_strtab_hash *strtab; |
| 1678 | |
| 1679 | strtab = _bfd_stringtab_init (); |
| 1680 | if (strtab == NULL) |
| 1681 | return FALSE; |
| 1682 | |
| 1683 | for (count = 0; count < bfd_get_symcount (abfd); count++) |
| 1684 | { |
| 1685 | asymbol *g = generic[count]; |
| 1686 | bfd_size_type indx; |
| 1687 | struct external_nlist nsp; |
| 1688 | |
| 1689 | PUT_WORD (abfd, 0, nsp.e_unused); |
| 1690 | |
| 1691 | indx = add_to_stringtab (abfd, strtab, g->name, FALSE); |
| 1692 | if (indx == (bfd_size_type) -1) |
| 1693 | goto error_return; |
| 1694 | PUT_WORD (abfd, indx, nsp.e_strx); |
| 1695 | |
| 1696 | if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) |
| 1697 | H_PUT_8 (abfd, aout_symbol(g)->type, nsp.e_type); |
| 1698 | else |
| 1699 | H_PUT_8 (abfd, 0, nsp.e_type); |
| 1700 | |
| 1701 | if (! translate_to_native_sym_flags (abfd, g, &nsp)) |
| 1702 | goto error_return; |
| 1703 | |
| 1704 | H_PUT_8 (abfd, 0, nsp.e_ovly); |
| 1705 | |
| 1706 | if (bfd_bwrite ((void *)&nsp, (bfd_size_type) EXTERNAL_NLIST_SIZE, abfd) |
| 1707 | != EXTERNAL_NLIST_SIZE) |
| 1708 | goto error_return; |
| 1709 | |
| 1710 | /* NB: `KEEPIT' currently overlays `udata.p', so set this only |
| 1711 | here, at the end. */ |
| 1712 | g->KEEPIT = count; |
| 1713 | } |
| 1714 | |
| 1715 | if (! emit_stringtab (abfd, strtab)) |
| 1716 | goto error_return; |
| 1717 | |
| 1718 | _bfd_stringtab_free (strtab); |
| 1719 | |
| 1720 | return TRUE; |
| 1721 | |
| 1722 | error_return: |
| 1723 | _bfd_stringtab_free (strtab); |
| 1724 | return FALSE; |
| 1725 | } |
| 1726 | |
| 1727 | \f |
| 1728 | long |
| 1729 | NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) |
| 1730 | { |
| 1731 | unsigned int counter = 0; |
| 1732 | aout_symbol_type *symbase; |
| 1733 | |
| 1734 | if (!NAME (aout, slurp_symbol_table) (abfd)) |
| 1735 | return -1; |
| 1736 | |
| 1737 | for (symbase = obj_aout_symbols (abfd); counter++ < bfd_get_symcount (abfd);) |
| 1738 | *(location++) = (asymbol *)(symbase++); |
| 1739 | *location++ =0; |
| 1740 | return bfd_get_symcount (abfd); |
| 1741 | } |
| 1742 | |
| 1743 | \f |
| 1744 | /* Output extended relocation information to a file in target byte order. */ |
| 1745 | |
| 1746 | static void |
| 1747 | pdp11_aout_swap_reloc_out (bfd *abfd, arelent *g, bfd_byte *natptr) |
| 1748 | { |
| 1749 | int r_index; |
| 1750 | int r_pcrel; |
| 1751 | int reloc_entry; |
| 1752 | int r_type; |
| 1753 | asymbol *sym = *(g->sym_ptr_ptr); |
| 1754 | asection *output_section = sym->section->output_section; |
| 1755 | |
| 1756 | if (g->addend != 0) |
| 1757 | fprintf (stderr, "BFD: can't do this reloc addend stuff\n"); |
| 1758 | |
| 1759 | r_pcrel = g->howto->pc_relative; |
| 1760 | |
| 1761 | if (bfd_is_abs_section (output_section)) |
| 1762 | r_type = RABS; |
| 1763 | else if (output_section == obj_textsec (abfd)) |
| 1764 | r_type = RTEXT; |
| 1765 | else if (output_section == obj_datasec (abfd)) |
| 1766 | r_type = RDATA; |
| 1767 | else if (output_section == obj_bsssec (abfd)) |
| 1768 | r_type = RBSS; |
| 1769 | else if (bfd_is_und_section (output_section)) |
| 1770 | r_type = REXT; |
| 1771 | else if (bfd_is_com_section (output_section)) |
| 1772 | r_type = REXT; |
| 1773 | else |
| 1774 | r_type = -1; |
| 1775 | |
| 1776 | BFD_ASSERT (r_type != -1); |
| 1777 | |
| 1778 | if (r_type == RABS) |
| 1779 | r_index = 0; |
| 1780 | else |
| 1781 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; |
| 1782 | |
| 1783 | reloc_entry = r_index << 4 | r_type | r_pcrel; |
| 1784 | |
| 1785 | PUT_WORD (abfd, reloc_entry, natptr); |
| 1786 | } |
| 1787 | |
| 1788 | /* BFD deals internally with all things based from the section they're |
| 1789 | in. so, something in 10 bytes into a text section with a base of |
| 1790 | 50 would have a symbol (.text+10) and know .text vma was 50. |
| 1791 | |
| 1792 | Aout keeps all it's symbols based from zero, so the symbol would |
| 1793 | contain 60. This macro subs the base of each section from the value |
| 1794 | to give the true offset from the section */ |
| 1795 | |
| 1796 | |
| 1797 | #define MOVE_ADDRESS(ad) \ |
| 1798 | if (r_extern) \ |
| 1799 | { \ |
| 1800 | /* Undefined symbol. */ \ |
| 1801 | cache_ptr->sym_ptr_ptr = symbols + r_index; \ |
| 1802 | cache_ptr->addend = ad; \ |
| 1803 | } \ |
| 1804 | else \ |
| 1805 | { \ |
| 1806 | /* Defined, section relative. replace symbol with pointer to \ |
| 1807 | symbol which points to section. */ \ |
| 1808 | switch (r_index) \ |
| 1809 | { \ |
| 1810 | case N_TEXT: \ |
| 1811 | case N_TEXT | N_EXT: \ |
| 1812 | cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ |
| 1813 | cache_ptr->addend = ad - su->textsec->vma; \ |
| 1814 | break; \ |
| 1815 | case N_DATA: \ |
| 1816 | case N_DATA | N_EXT: \ |
| 1817 | cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ |
| 1818 | cache_ptr->addend = ad - su->datasec->vma; \ |
| 1819 | break; \ |
| 1820 | case N_BSS: \ |
| 1821 | case N_BSS | N_EXT: \ |
| 1822 | cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ |
| 1823 | cache_ptr->addend = ad - su->bsssec->vma; \ |
| 1824 | break; \ |
| 1825 | default: \ |
| 1826 | case N_ABS: \ |
| 1827 | case N_ABS | N_EXT: \ |
| 1828 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ |
| 1829 | cache_ptr->addend = ad; \ |
| 1830 | break; \ |
| 1831 | } \ |
| 1832 | } |
| 1833 | |
| 1834 | static void |
| 1835 | pdp11_aout_swap_reloc_in (bfd * abfd, |
| 1836 | bfd_byte * bytes, |
| 1837 | arelent * cache_ptr, |
| 1838 | bfd_size_type offset, |
| 1839 | asymbol ** symbols, |
| 1840 | bfd_size_type symcount) |
| 1841 | { |
| 1842 | struct aoutdata *su = &(abfd->tdata.aout_data->a); |
| 1843 | unsigned int r_index; |
| 1844 | int reloc_entry; |
| 1845 | int r_extern; |
| 1846 | int r_pcrel; |
| 1847 | |
| 1848 | reloc_entry = GET_WORD (abfd, (void *) bytes); |
| 1849 | |
| 1850 | r_pcrel = reloc_entry & RELFLG; |
| 1851 | |
| 1852 | cache_ptr->address = offset; |
| 1853 | cache_ptr->howto = howto_table_pdp11 + (r_pcrel ? 1 : 0); |
| 1854 | |
| 1855 | if ((reloc_entry & RTYPE) == RABS) |
| 1856 | r_index = N_ABS; |
| 1857 | else |
| 1858 | r_index = RINDEX (reloc_entry); |
| 1859 | |
| 1860 | /* r_extern reflects whether the symbol the reloc is against is |
| 1861 | local or global. */ |
| 1862 | r_extern = (reloc_entry & RTYPE) == REXT; |
| 1863 | |
| 1864 | if (r_extern && r_index >= symcount) |
| 1865 | { |
| 1866 | /* We could arrange to return an error, but it might be useful |
| 1867 | to see the file even if it is bad. FIXME: Of course this |
| 1868 | means that objdump -r *doesn't* see the actual reloc, and |
| 1869 | objcopy silently writes a different reloc. */ |
| 1870 | r_extern = 0; |
| 1871 | r_index = N_ABS; |
| 1872 | } |
| 1873 | |
| 1874 | MOVE_ADDRESS(0); |
| 1875 | } |
| 1876 | |
| 1877 | /* Read and swap the relocs for a section. */ |
| 1878 | |
| 1879 | bfd_boolean |
| 1880 | NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) |
| 1881 | { |
| 1882 | bfd_byte *rptr; |
| 1883 | bfd_size_type count; |
| 1884 | bfd_size_type reloc_size; |
| 1885 | void * relocs; |
| 1886 | arelent *reloc_cache; |
| 1887 | size_t each_size; |
| 1888 | unsigned int counter = 0; |
| 1889 | arelent *cache_ptr; |
| 1890 | |
| 1891 | if (asect->relocation) |
| 1892 | return TRUE; |
| 1893 | |
| 1894 | if (asect->flags & SEC_CONSTRUCTOR) |
| 1895 | return TRUE; |
| 1896 | |
| 1897 | if (asect == obj_datasec (abfd)) |
| 1898 | reloc_size = exec_hdr(abfd)->a_drsize; |
| 1899 | else if (asect == obj_textsec (abfd)) |
| 1900 | reloc_size = exec_hdr(abfd)->a_trsize; |
| 1901 | else if (asect == obj_bsssec (abfd)) |
| 1902 | reloc_size = 0; |
| 1903 | else |
| 1904 | { |
| 1905 | bfd_set_error (bfd_error_invalid_operation); |
| 1906 | return FALSE; |
| 1907 | } |
| 1908 | |
| 1909 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
| 1910 | return FALSE; |
| 1911 | relocs = _bfd_malloc_and_read (abfd, reloc_size, reloc_size); |
| 1912 | if (relocs == NULL && reloc_size != 0) |
| 1913 | return FALSE; |
| 1914 | |
| 1915 | each_size = obj_reloc_entry_size (abfd); |
| 1916 | count = reloc_size / each_size; |
| 1917 | |
| 1918 | /* Count the number of NON-ZERO relocs, this is the count we want. */ |
| 1919 | { |
| 1920 | unsigned int real_count = 0; |
| 1921 | |
| 1922 | for (counter = 0; counter < count; counter++) |
| 1923 | { |
| 1924 | int x; |
| 1925 | |
| 1926 | x = GET_WORD (abfd, (char *) relocs + each_size * counter); |
| 1927 | if (x != 0) |
| 1928 | real_count++; |
| 1929 | } |
| 1930 | |
| 1931 | count = real_count; |
| 1932 | } |
| 1933 | |
| 1934 | reloc_cache = bfd_zmalloc (count * sizeof (arelent)); |
| 1935 | if (reloc_cache == NULL && count != 0) |
| 1936 | return FALSE; |
| 1937 | |
| 1938 | cache_ptr = reloc_cache; |
| 1939 | |
| 1940 | rptr = relocs; |
| 1941 | for (counter = 0; |
| 1942 | counter < count; |
| 1943 | counter++, rptr += RELOC_SIZE, cache_ptr++) |
| 1944 | { |
| 1945 | while (GET_WORD (abfd, (void *) rptr) == 0) |
| 1946 | { |
| 1947 | rptr += RELOC_SIZE; |
| 1948 | if ((char *) rptr >= (char *) relocs + reloc_size) |
| 1949 | goto done; |
| 1950 | } |
| 1951 | |
| 1952 | pdp11_aout_swap_reloc_in (abfd, rptr, cache_ptr, |
| 1953 | (bfd_size_type) ((char *) rptr - (char *) relocs), |
| 1954 | symbols, |
| 1955 | (bfd_size_type) bfd_get_symcount (abfd)); |
| 1956 | } |
| 1957 | done: |
| 1958 | /* Just in case, if rptr >= relocs + reloc_size should happen |
| 1959 | too early. */ |
| 1960 | BFD_ASSERT (counter == count); |
| 1961 | |
| 1962 | free (relocs); |
| 1963 | |
| 1964 | asect->relocation = reloc_cache; |
| 1965 | asect->reloc_count = cache_ptr - reloc_cache; |
| 1966 | |
| 1967 | return TRUE; |
| 1968 | } |
| 1969 | |
| 1970 | /* Write out a relocation section into an object file. */ |
| 1971 | |
| 1972 | bfd_boolean |
| 1973 | NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) |
| 1974 | { |
| 1975 | arelent **generic; |
| 1976 | unsigned char *native; |
| 1977 | unsigned int count = section->reloc_count; |
| 1978 | bfd_size_type natsize; |
| 1979 | |
| 1980 | natsize = section->size; |
| 1981 | native = bfd_zalloc (abfd, natsize); |
| 1982 | if (!native) |
| 1983 | return FALSE; |
| 1984 | |
| 1985 | generic = section->orelocation; |
| 1986 | if (generic != NULL) |
| 1987 | { |
| 1988 | while (count > 0) |
| 1989 | { |
| 1990 | bfd_byte *r; |
| 1991 | |
| 1992 | if ((*generic)->howto == NULL |
| 1993 | || (*generic)->sym_ptr_ptr == NULL) |
| 1994 | { |
| 1995 | bfd_set_error (bfd_error_invalid_operation); |
| 1996 | _bfd_error_handler (_("%pB: attempt to write out " |
| 1997 | "unknown reloc type"), abfd); |
| 1998 | bfd_release (abfd, native); |
| 1999 | return FALSE; |
| 2000 | } |
| 2001 | r = native + (*generic)->address; |
| 2002 | pdp11_aout_swap_reloc_out (abfd, *generic, r); |
| 2003 | count--; |
| 2004 | generic++; |
| 2005 | } |
| 2006 | } |
| 2007 | |
| 2008 | if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) |
| 2009 | { |
| 2010 | bfd_release (abfd, native); |
| 2011 | return FALSE; |
| 2012 | } |
| 2013 | |
| 2014 | bfd_release (abfd, native); |
| 2015 | return TRUE; |
| 2016 | } |
| 2017 | |
| 2018 | /* This is stupid. This function should be a boolean predicate. */ |
| 2019 | |
| 2020 | long |
| 2021 | NAME (aout, canonicalize_reloc) (bfd *abfd, |
| 2022 | sec_ptr section, |
| 2023 | arelent **relptr, |
| 2024 | asymbol **symbols) |
| 2025 | { |
| 2026 | arelent *tblptr = section->relocation; |
| 2027 | unsigned int count; |
| 2028 | |
| 2029 | if (section == obj_bsssec (abfd)) |
| 2030 | { |
| 2031 | *relptr = NULL; |
| 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | if (!(tblptr || NAME (aout, slurp_reloc_table)(abfd, section, symbols))) |
| 2036 | return -1; |
| 2037 | |
| 2038 | if (section->flags & SEC_CONSTRUCTOR) |
| 2039 | { |
| 2040 | arelent_chain *chain = section->constructor_chain; |
| 2041 | |
| 2042 | for (count = 0; count < section->reloc_count; count ++) |
| 2043 | { |
| 2044 | *relptr ++ = &chain->relent; |
| 2045 | chain = chain->next; |
| 2046 | } |
| 2047 | } |
| 2048 | else |
| 2049 | { |
| 2050 | tblptr = section->relocation; |
| 2051 | |
| 2052 | for (count = 0; count++ < section->reloc_count;) |
| 2053 | *relptr++ = tblptr++; |
| 2054 | } |
| 2055 | |
| 2056 | *relptr = 0; |
| 2057 | |
| 2058 | return section->reloc_count; |
| 2059 | } |
| 2060 | |
| 2061 | long |
| 2062 | NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) |
| 2063 | { |
| 2064 | bfd_size_type count; |
| 2065 | |
| 2066 | if (bfd_get_format (abfd) != bfd_object) |
| 2067 | { |
| 2068 | bfd_set_error (bfd_error_invalid_operation); |
| 2069 | return -1; |
| 2070 | } |
| 2071 | |
| 2072 | if (asect->flags & SEC_CONSTRUCTOR) |
| 2073 | count = asect->reloc_count; |
| 2074 | else if (asect == obj_datasec (abfd)) |
| 2075 | count = exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); |
| 2076 | else if (asect == obj_textsec (abfd)) |
| 2077 | count = exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); |
| 2078 | else if (asect == obj_bsssec (abfd)) |
| 2079 | count = 0; |
| 2080 | else |
| 2081 | { |
| 2082 | bfd_set_error (bfd_error_invalid_operation); |
| 2083 | return -1; |
| 2084 | } |
| 2085 | |
| 2086 | if (count >= LONG_MAX / sizeof (arelent *)) |
| 2087 | { |
| 2088 | bfd_set_error (bfd_error_file_too_big); |
| 2089 | return -1; |
| 2090 | } |
| 2091 | return (count + 1) * sizeof (arelent *); |
| 2092 | } |
| 2093 | |
| 2094 | \f |
| 2095 | long |
| 2096 | NAME (aout, get_symtab_upper_bound) (bfd *abfd) |
| 2097 | { |
| 2098 | if (!NAME (aout, slurp_symbol_table) (abfd)) |
| 2099 | return -1; |
| 2100 | |
| 2101 | return (bfd_get_symcount (abfd) + 1) * (sizeof (aout_symbol_type *)); |
| 2102 | } |
| 2103 | |
| 2104 | alent * |
| 2105 | NAME (aout, get_lineno) (bfd * abfd ATTRIBUTE_UNUSED, |
| 2106 | asymbol * symbol ATTRIBUTE_UNUSED) |
| 2107 | { |
| 2108 | return NULL; |
| 2109 | } |
| 2110 | |
| 2111 | void |
| 2112 | NAME (aout, get_symbol_info) (bfd * abfd ATTRIBUTE_UNUSED, |
| 2113 | asymbol *symbol, |
| 2114 | symbol_info *ret) |
| 2115 | { |
| 2116 | bfd_symbol_info (symbol, ret); |
| 2117 | |
| 2118 | if (ret->type == '?') |
| 2119 | { |
| 2120 | int type_code = aout_symbol(symbol)->type & 0xff; |
| 2121 | const char *stab_name = bfd_get_stab_name (type_code); |
| 2122 | static char buf[10]; |
| 2123 | |
| 2124 | if (stab_name == NULL) |
| 2125 | { |
| 2126 | sprintf(buf, "(%d)", type_code); |
| 2127 | stab_name = buf; |
| 2128 | } |
| 2129 | ret->type = '-'; |
| 2130 | ret->stab_type = type_code; |
| 2131 | ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff); |
| 2132 | ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff); |
| 2133 | ret->stab_name = stab_name; |
| 2134 | } |
| 2135 | } |
| 2136 | |
| 2137 | void |
| 2138 | NAME (aout, print_symbol) (bfd * abfd, |
| 2139 | void * afile, |
| 2140 | asymbol *symbol, |
| 2141 | bfd_print_symbol_type how) |
| 2142 | { |
| 2143 | FILE *file = (FILE *) afile; |
| 2144 | |
| 2145 | switch (how) |
| 2146 | { |
| 2147 | case bfd_print_symbol_name: |
| 2148 | if (symbol->name) |
| 2149 | fprintf(file,"%s", symbol->name); |
| 2150 | break; |
| 2151 | case bfd_print_symbol_more: |
| 2152 | fprintf(file,"%4x %2x %2x", |
| 2153 | (unsigned) (aout_symbol (symbol)->desc & 0xffff), |
| 2154 | (unsigned) (aout_symbol (symbol)->other & 0xff), |
| 2155 | (unsigned) (aout_symbol (symbol)->type)); |
| 2156 | break; |
| 2157 | case bfd_print_symbol_all: |
| 2158 | { |
| 2159 | const char *section_name = symbol->section->name; |
| 2160 | |
| 2161 | bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
| 2162 | |
| 2163 | fprintf (file," %-5s %04x %02x %02x", |
| 2164 | section_name, |
| 2165 | (unsigned) (aout_symbol (symbol)->desc & 0xffff), |
| 2166 | (unsigned) (aout_symbol (symbol)->other & 0xff), |
| 2167 | (unsigned) (aout_symbol (symbol)->type & 0xff)); |
| 2168 | if (symbol->name) |
| 2169 | fprintf(file," %s", symbol->name); |
| 2170 | } |
| 2171 | break; |
| 2172 | } |
| 2173 | } |
| 2174 | |
| 2175 | /* If we don't have to allocate more than 1MB to hold the generic |
| 2176 | symbols, we use the generic minisymbol method: it's faster, since |
| 2177 | it only translates the symbols once, not multiple times. */ |
| 2178 | #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) |
| 2179 | |
| 2180 | /* Read minisymbols. For minisymbols, we use the unmodified a.out |
| 2181 | symbols. The minisymbol_to_symbol function translates these into |
| 2182 | BFD asymbol structures. */ |
| 2183 | |
| 2184 | long |
| 2185 | NAME (aout, read_minisymbols) (bfd *abfd, |
| 2186 | bfd_boolean dynamic, |
| 2187 | void * *minisymsp, |
| 2188 | unsigned int *sizep) |
| 2189 | { |
| 2190 | if (dynamic) |
| 2191 | /* We could handle the dynamic symbols here as well, but it's |
| 2192 | easier to hand them off. */ |
| 2193 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); |
| 2194 | |
| 2195 | if (! aout_get_external_symbols (abfd)) |
| 2196 | return -1; |
| 2197 | |
| 2198 | if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) |
| 2199 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); |
| 2200 | |
| 2201 | *minisymsp = (void *) obj_aout_external_syms (abfd); |
| 2202 | |
| 2203 | /* By passing the external symbols back from this routine, we are |
| 2204 | giving up control over the memory block. Clear |
| 2205 | obj_aout_external_syms, so that we do not try to free it |
| 2206 | ourselves. */ |
| 2207 | obj_aout_external_syms (abfd) = NULL; |
| 2208 | |
| 2209 | *sizep = EXTERNAL_NLIST_SIZE; |
| 2210 | return obj_aout_external_sym_count (abfd); |
| 2211 | } |
| 2212 | |
| 2213 | /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an |
| 2214 | unmodified a.out symbol. The SYM argument is a structure returned |
| 2215 | by bfd_make_empty_symbol, which we fill in here. */ |
| 2216 | |
| 2217 | asymbol * |
| 2218 | NAME (aout, minisymbol_to_symbol) (bfd *abfd, |
| 2219 | bfd_boolean dynamic, |
| 2220 | const void * minisym, |
| 2221 | asymbol *sym) |
| 2222 | { |
| 2223 | if (dynamic |
| 2224 | || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) |
| 2225 | return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); |
| 2226 | |
| 2227 | memset (sym, 0, sizeof (aout_symbol_type)); |
| 2228 | |
| 2229 | /* We call translate_symbol_table to translate a single symbol. */ |
| 2230 | if (! (NAME (aout, translate_symbol_table) |
| 2231 | (abfd, |
| 2232 | (aout_symbol_type *) sym, |
| 2233 | (struct external_nlist *) minisym, |
| 2234 | (bfd_size_type) 1, |
| 2235 | obj_aout_external_strings (abfd), |
| 2236 | obj_aout_external_string_size (abfd), |
| 2237 | FALSE))) |
| 2238 | return NULL; |
| 2239 | |
| 2240 | return sym; |
| 2241 | } |
| 2242 | |
| 2243 | /* Provided a BFD, a section and an offset into the section, calculate |
| 2244 | and return the name of the source file and the line nearest to the |
| 2245 | wanted location. */ |
| 2246 | |
| 2247 | bfd_boolean |
| 2248 | NAME (aout, find_nearest_line) (bfd *abfd, |
| 2249 | asymbol **symbols, |
| 2250 | asection *section, |
| 2251 | bfd_vma offset, |
| 2252 | const char **filename_ptr, |
| 2253 | const char **functionname_ptr, |
| 2254 | unsigned int *line_ptr, |
| 2255 | unsigned int *discriminator_ptr) |
| 2256 | { |
| 2257 | /* Run down the file looking for the filename, function and linenumber. */ |
| 2258 | asymbol **p; |
| 2259 | const char *directory_name = NULL; |
| 2260 | const char *main_file_name = NULL; |
| 2261 | const char *current_file_name = NULL; |
| 2262 | const char *line_file_name = NULL; /* Value of current_file_name at line number. */ |
| 2263 | bfd_vma low_line_vma = 0; |
| 2264 | bfd_vma low_func_vma = 0; |
| 2265 | asymbol *func = 0; |
| 2266 | size_t filelen, funclen; |
| 2267 | char *buf; |
| 2268 | |
| 2269 | *filename_ptr = bfd_get_filename (abfd); |
| 2270 | *functionname_ptr = NULL; |
| 2271 | *line_ptr = 0; |
| 2272 | if (discriminator_ptr) |
| 2273 | *discriminator_ptr = 0; |
| 2274 | |
| 2275 | if (symbols != NULL) |
| 2276 | { |
| 2277 | for (p = symbols; *p; p++) |
| 2278 | { |
| 2279 | aout_symbol_type *q = (aout_symbol_type *)(*p); |
| 2280 | next: |
| 2281 | switch (q->type) |
| 2282 | { |
| 2283 | case N_TEXT: |
| 2284 | /* If this looks like a file name symbol, and it comes after |
| 2285 | the line number we have found so far, but before the |
| 2286 | offset, then we have probably not found the right line |
| 2287 | number. */ |
| 2288 | if (q->symbol.value <= offset |
| 2289 | && ((q->symbol.value > low_line_vma |
| 2290 | && (line_file_name != NULL |
| 2291 | || *line_ptr != 0)) |
| 2292 | || (q->symbol.value > low_func_vma |
| 2293 | && func != NULL))) |
| 2294 | { |
| 2295 | const char * symname; |
| 2296 | |
| 2297 | symname = q->symbol.name; |
| 2298 | |
| 2299 | if (symname != NULL |
| 2300 | && strlen (symname) > 2 |
| 2301 | && strcmp (symname + strlen (symname) - 2, ".o") == 0) |
| 2302 | { |
| 2303 | if (q->symbol.value > low_line_vma) |
| 2304 | { |
| 2305 | *line_ptr = 0; |
| 2306 | line_file_name = NULL; |
| 2307 | } |
| 2308 | if (q->symbol.value > low_func_vma) |
| 2309 | func = NULL; |
| 2310 | } |
| 2311 | } |
| 2312 | break; |
| 2313 | |
| 2314 | case N_SO: |
| 2315 | /* If this symbol is less than the offset, but greater than |
| 2316 | the line number we have found so far, then we have not |
| 2317 | found the right line number. */ |
| 2318 | if (q->symbol.value <= offset) |
| 2319 | { |
| 2320 | if (q->symbol.value > low_line_vma) |
| 2321 | { |
| 2322 | *line_ptr = 0; |
| 2323 | line_file_name = NULL; |
| 2324 | } |
| 2325 | if (q->symbol.value > low_func_vma) |
| 2326 | func = NULL; |
| 2327 | } |
| 2328 | |
| 2329 | main_file_name = current_file_name = q->symbol.name; |
| 2330 | /* Look ahead to next symbol to check if that too is an N_SO. */ |
| 2331 | p++; |
| 2332 | if (*p == NULL) |
| 2333 | goto done; |
| 2334 | q = (aout_symbol_type *)(*p); |
| 2335 | if (q->type != (int) N_SO) |
| 2336 | goto next; |
| 2337 | |
| 2338 | /* Found a second N_SO First is directory; second is filename. */ |
| 2339 | directory_name = current_file_name; |
| 2340 | main_file_name = current_file_name = q->symbol.name; |
| 2341 | if (obj_textsec(abfd) != section) |
| 2342 | goto done; |
| 2343 | break; |
| 2344 | case N_SOL: |
| 2345 | current_file_name = q->symbol.name; |
| 2346 | break; |
| 2347 | |
| 2348 | case N_SLINE: |
| 2349 | case N_DSLINE: |
| 2350 | case N_BSLINE: |
| 2351 | /* We'll keep this if it resolves nearer than the one we have |
| 2352 | already. */ |
| 2353 | if (q->symbol.value >= low_line_vma |
| 2354 | && q->symbol.value <= offset) |
| 2355 | { |
| 2356 | *line_ptr = q->desc; |
| 2357 | low_line_vma = q->symbol.value; |
| 2358 | line_file_name = current_file_name; |
| 2359 | } |
| 2360 | break; |
| 2361 | |
| 2362 | case N_FUN: |
| 2363 | { |
| 2364 | /* We'll keep this if it is nearer than the one we have already. */ |
| 2365 | if (q->symbol.value >= low_func_vma && |
| 2366 | q->symbol.value <= offset) |
| 2367 | { |
| 2368 | low_func_vma = q->symbol.value; |
| 2369 | func = (asymbol *) q; |
| 2370 | } |
| 2371 | else if (q->symbol.value > offset) |
| 2372 | goto done; |
| 2373 | } |
| 2374 | break; |
| 2375 | } |
| 2376 | } |
| 2377 | } |
| 2378 | |
| 2379 | done: |
| 2380 | if (*line_ptr != 0) |
| 2381 | main_file_name = line_file_name; |
| 2382 | |
| 2383 | if (main_file_name == NULL |
| 2384 | || main_file_name[0] == '/' |
| 2385 | || directory_name == NULL) |
| 2386 | filelen = 0; |
| 2387 | else |
| 2388 | filelen = strlen (directory_name) + strlen (main_file_name); |
| 2389 | if (func == NULL) |
| 2390 | funclen = 0; |
| 2391 | else |
| 2392 | funclen = strlen (bfd_asymbol_name (func)); |
| 2393 | |
| 2394 | free (adata (abfd).line_buf); |
| 2395 | if (filelen + funclen == 0) |
| 2396 | adata (abfd).line_buf = buf = NULL; |
| 2397 | else |
| 2398 | { |
| 2399 | buf = bfd_malloc ((bfd_size_type) filelen + funclen + 3); |
| 2400 | adata (abfd).line_buf = buf; |
| 2401 | if (buf == NULL) |
| 2402 | return FALSE; |
| 2403 | } |
| 2404 | |
| 2405 | if (main_file_name != NULL) |
| 2406 | { |
| 2407 | if (main_file_name[0] == '/' || directory_name == NULL) |
| 2408 | *filename_ptr = main_file_name; |
| 2409 | else |
| 2410 | { |
| 2411 | if (buf == NULL) |
| 2412 | /* PR binutils/20891: In a corrupt input file both |
| 2413 | main_file_name and directory_name can be empty... */ |
| 2414 | * filename_ptr = NULL; |
| 2415 | else |
| 2416 | { |
| 2417 | snprintf (buf, filelen + 1, "%s%s", directory_name, |
| 2418 | main_file_name); |
| 2419 | *filename_ptr = buf; |
| 2420 | buf += filelen + 1; |
| 2421 | } |
| 2422 | } |
| 2423 | } |
| 2424 | |
| 2425 | if (func) |
| 2426 | { |
| 2427 | const char *function = func->name; |
| 2428 | char *colon; |
| 2429 | |
| 2430 | if (buf == NULL) |
| 2431 | { |
| 2432 | /* PR binutils/20892: In a corrupt input file func can be empty. */ |
| 2433 | * functionname_ptr = NULL; |
| 2434 | return TRUE; |
| 2435 | } |
| 2436 | /* The caller expects a symbol name. We actually have a |
| 2437 | function name, without the leading underscore. Put the |
| 2438 | underscore back in, so that the caller gets a symbol name. */ |
| 2439 | if (bfd_get_symbol_leading_char (abfd) == '\0') |
| 2440 | strcpy (buf, function); |
| 2441 | else |
| 2442 | { |
| 2443 | buf[0] = bfd_get_symbol_leading_char (abfd); |
| 2444 | strcpy (buf + 1, function); |
| 2445 | } |
| 2446 | |
| 2447 | /* Have to remove : stuff. */ |
| 2448 | colon = strchr (buf, ':'); |
| 2449 | if (colon != NULL) |
| 2450 | *colon = '\0'; |
| 2451 | *functionname_ptr = buf; |
| 2452 | } |
| 2453 | |
| 2454 | return TRUE; |
| 2455 | } |
| 2456 | |
| 2457 | int |
| 2458 | NAME (aout, sizeof_headers) (bfd *abfd, |
| 2459 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2460 | { |
| 2461 | return adata (abfd).exec_bytes_size; |
| 2462 | } |
| 2463 | |
| 2464 | /* Free all information we have cached for this BFD. We can always |
| 2465 | read it again later if we need it. */ |
| 2466 | |
| 2467 | bfd_boolean |
| 2468 | NAME (aout, bfd_free_cached_info) (bfd *abfd) |
| 2469 | { |
| 2470 | asection *o; |
| 2471 | |
| 2472 | if (bfd_get_format (abfd) != bfd_object) |
| 2473 | return TRUE; |
| 2474 | |
| 2475 | #define BFCI_FREE(x) do { free (x); x = NULL; } while (0) |
| 2476 | BFCI_FREE (obj_aout_symbols (abfd)); |
| 2477 | |
| 2478 | #ifdef USE_MMAP |
| 2479 | obj_aout_external_syms (abfd) = 0; |
| 2480 | bfd_free_window (&obj_aout_sym_window (abfd)); |
| 2481 | bfd_free_window (&obj_aout_string_window (abfd)); |
| 2482 | obj_aout_external_strings (abfd) = 0; |
| 2483 | #else |
| 2484 | BFCI_FREE (obj_aout_external_syms (abfd)); |
| 2485 | BFCI_FREE (obj_aout_external_strings (abfd)); |
| 2486 | #endif |
| 2487 | for (o = abfd->sections; o != NULL; o = o->next) |
| 2488 | BFCI_FREE (o->relocation); |
| 2489 | #undef BFCI_FREE |
| 2490 | |
| 2491 | return TRUE; |
| 2492 | } |
| 2493 | \f |
| 2494 | /* Routine to create an entry in an a.out link hash table. */ |
| 2495 | |
| 2496 | struct bfd_hash_entry * |
| 2497 | NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, |
| 2498 | struct bfd_hash_table *table, |
| 2499 | const char *string) |
| 2500 | { |
| 2501 | struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; |
| 2502 | |
| 2503 | /* Allocate the structure if it has not already been allocated by a |
| 2504 | subclass. */ |
| 2505 | if (ret == NULL) |
| 2506 | ret = bfd_hash_allocate (table, sizeof (* ret)); |
| 2507 | if (ret == NULL) |
| 2508 | return NULL; |
| 2509 | |
| 2510 | /* Call the allocation method of the superclass. */ |
| 2511 | ret = (struct aout_link_hash_entry *) |
| 2512 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); |
| 2513 | if (ret) |
| 2514 | { |
| 2515 | /* Set local fields. */ |
| 2516 | ret->written = FALSE; |
| 2517 | ret->indx = -1; |
| 2518 | } |
| 2519 | |
| 2520 | return (struct bfd_hash_entry *) ret; |
| 2521 | } |
| 2522 | |
| 2523 | /* Initialize an a.out link hash table. */ |
| 2524 | |
| 2525 | bfd_boolean |
| 2526 | NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, |
| 2527 | bfd *abfd, |
| 2528 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, |
| 2529 | struct bfd_hash_table *, |
| 2530 | const char *), |
| 2531 | unsigned int entsize) |
| 2532 | { |
| 2533 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); |
| 2534 | } |
| 2535 | |
| 2536 | /* Create an a.out link hash table. */ |
| 2537 | |
| 2538 | struct bfd_link_hash_table * |
| 2539 | NAME (aout, link_hash_table_create) (bfd *abfd) |
| 2540 | { |
| 2541 | struct aout_link_hash_table *ret; |
| 2542 | size_t amt = sizeof (struct aout_link_hash_table); |
| 2543 | |
| 2544 | ret = bfd_malloc (amt); |
| 2545 | if (ret == NULL) |
| 2546 | return NULL; |
| 2547 | if (! NAME (aout, link_hash_table_init) (ret, abfd, |
| 2548 | NAME (aout, link_hash_newfunc), |
| 2549 | sizeof (struct aout_link_hash_entry))) |
| 2550 | { |
| 2551 | free (ret); |
| 2552 | return NULL; |
| 2553 | } |
| 2554 | return &ret->root; |
| 2555 | } |
| 2556 | |
| 2557 | /* Free up the internal symbols read from an a.out file. */ |
| 2558 | |
| 2559 | static bfd_boolean |
| 2560 | aout_link_free_symbols (bfd *abfd) |
| 2561 | { |
| 2562 | if (obj_aout_external_syms (abfd) != NULL) |
| 2563 | { |
| 2564 | #ifdef USE_MMAP |
| 2565 | bfd_free_window (&obj_aout_sym_window (abfd)); |
| 2566 | #else |
| 2567 | free ((void *) obj_aout_external_syms (abfd)); |
| 2568 | #endif |
| 2569 | obj_aout_external_syms (abfd) = NULL; |
| 2570 | } |
| 2571 | |
| 2572 | if (obj_aout_external_strings (abfd) != NULL) |
| 2573 | { |
| 2574 | #ifdef USE_MMAP |
| 2575 | bfd_free_window (&obj_aout_string_window (abfd)); |
| 2576 | #else |
| 2577 | free ((void *) obj_aout_external_strings (abfd)); |
| 2578 | #endif |
| 2579 | obj_aout_external_strings (abfd) = NULL; |
| 2580 | } |
| 2581 | return TRUE; |
| 2582 | } |
| 2583 | |
| 2584 | /* Given an a.out BFD, add symbols to the global hash table as |
| 2585 | appropriate. */ |
| 2586 | |
| 2587 | bfd_boolean |
| 2588 | NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) |
| 2589 | { |
| 2590 | switch (bfd_get_format (abfd)) |
| 2591 | { |
| 2592 | case bfd_object: |
| 2593 | return aout_link_add_object_symbols (abfd, info); |
| 2594 | case bfd_archive: |
| 2595 | return _bfd_generic_link_add_archive_symbols |
| 2596 | (abfd, info, aout_link_check_archive_element); |
| 2597 | default: |
| 2598 | bfd_set_error (bfd_error_wrong_format); |
| 2599 | return FALSE; |
| 2600 | } |
| 2601 | } |
| 2602 | |
| 2603 | /* Add symbols from an a.out object file. */ |
| 2604 | |
| 2605 | static bfd_boolean |
| 2606 | aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) |
| 2607 | { |
| 2608 | if (! aout_get_external_symbols (abfd)) |
| 2609 | return FALSE; |
| 2610 | if (! aout_link_add_symbols (abfd, info)) |
| 2611 | return FALSE; |
| 2612 | if (! info->keep_memory) |
| 2613 | { |
| 2614 | if (! aout_link_free_symbols (abfd)) |
| 2615 | return FALSE; |
| 2616 | } |
| 2617 | return TRUE; |
| 2618 | } |
| 2619 | |
| 2620 | /* Look through the internal symbols to see if this object file should |
| 2621 | be included in the link. We should include this object file if it |
| 2622 | defines any symbols which are currently undefined. If this object |
| 2623 | file defines a common symbol, then we may adjust the size of the |
| 2624 | known symbol but we do not include the object file in the link |
| 2625 | (unless there is some other reason to include it). */ |
| 2626 | |
| 2627 | static bfd_boolean |
| 2628 | aout_link_check_ar_symbols (bfd *abfd, |
| 2629 | struct bfd_link_info *info, |
| 2630 | bfd_boolean *pneeded, |
| 2631 | bfd **subsbfd) |
| 2632 | { |
| 2633 | struct external_nlist *p; |
| 2634 | struct external_nlist *pend; |
| 2635 | char *strings; |
| 2636 | |
| 2637 | *pneeded = FALSE; |
| 2638 | |
| 2639 | /* Look through all the symbols. */ |
| 2640 | p = obj_aout_external_syms (abfd); |
| 2641 | pend = p + obj_aout_external_sym_count (abfd); |
| 2642 | strings = obj_aout_external_strings (abfd); |
| 2643 | for (; p < pend; p++) |
| 2644 | { |
| 2645 | int type = H_GET_8 (abfd, p->e_type); |
| 2646 | const char *name; |
| 2647 | struct bfd_link_hash_entry *h; |
| 2648 | |
| 2649 | /* Ignore symbols that are not externally visible. This is an |
| 2650 | optimization only, as we check the type more thoroughly |
| 2651 | below. */ |
| 2652 | if ((type & N_EXT) == 0 |
| 2653 | || type == N_FN) |
| 2654 | continue; |
| 2655 | |
| 2656 | name = strings + GET_WORD (abfd, p->e_strx); |
| 2657 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
| 2658 | |
| 2659 | /* We are only interested in symbols that are currently |
| 2660 | undefined or common. */ |
| 2661 | if (h == NULL |
| 2662 | || (h->type != bfd_link_hash_undefined |
| 2663 | && h->type != bfd_link_hash_common)) |
| 2664 | continue; |
| 2665 | |
| 2666 | if (type == (N_TEXT | N_EXT) |
| 2667 | || type == (N_DATA | N_EXT) |
| 2668 | || type == (N_BSS | N_EXT) |
| 2669 | || type == (N_ABS | N_EXT)) |
| 2670 | { |
| 2671 | /* This object file defines this symbol. We must link it |
| 2672 | in. This is true regardless of whether the current |
| 2673 | definition of the symbol is undefined or common. If the |
| 2674 | current definition is common, we have a case in which we |
| 2675 | have already seen an object file including |
| 2676 | int a; |
| 2677 | and this object file from the archive includes |
| 2678 | int a = 5; |
| 2679 | In such a case we must include this object file. |
| 2680 | |
| 2681 | FIXME: The SunOS 4.1.3 linker will pull in the archive |
| 2682 | element if the symbol is defined in the .data section, |
| 2683 | but not if it is defined in the .text section. That |
| 2684 | seems a bit crazy to me, and I haven't implemented it. |
| 2685 | However, it might be correct. */ |
| 2686 | if (!(*info->callbacks |
| 2687 | ->add_archive_element) (info, abfd, name, subsbfd)) |
| 2688 | continue; |
| 2689 | *pneeded = TRUE; |
| 2690 | return TRUE; |
| 2691 | } |
| 2692 | |
| 2693 | if (type == (N_UNDF | N_EXT)) |
| 2694 | { |
| 2695 | bfd_vma value; |
| 2696 | |
| 2697 | value = GET_WORD (abfd, p->e_value); |
| 2698 | if (value != 0) |
| 2699 | { |
| 2700 | /* This symbol is common in the object from the archive |
| 2701 | file. */ |
| 2702 | if (h->type == bfd_link_hash_undefined) |
| 2703 | { |
| 2704 | bfd *symbfd; |
| 2705 | unsigned int power; |
| 2706 | |
| 2707 | symbfd = h->u.undef.abfd; |
| 2708 | if (symbfd == NULL) |
| 2709 | { |
| 2710 | /* This symbol was created as undefined from |
| 2711 | outside BFD. We assume that we should link |
| 2712 | in the object file. This is done for the -u |
| 2713 | option in the linker. */ |
| 2714 | if (!(*info->callbacks |
| 2715 | ->add_archive_element) (info, abfd, name, subsbfd)) |
| 2716 | return FALSE; |
| 2717 | *pneeded = TRUE; |
| 2718 | return TRUE; |
| 2719 | } |
| 2720 | /* Turn the current link symbol into a common |
| 2721 | symbol. It is already on the undefs list. */ |
| 2722 | h->type = bfd_link_hash_common; |
| 2723 | h->u.c.p = bfd_hash_allocate (&info->hash->table, |
| 2724 | sizeof (struct bfd_link_hash_common_entry)); |
| 2725 | if (h->u.c.p == NULL) |
| 2726 | return FALSE; |
| 2727 | |
| 2728 | h->u.c.size = value; |
| 2729 | |
| 2730 | /* FIXME: This isn't quite right. The maximum |
| 2731 | alignment of a common symbol should be set by the |
| 2732 | architecture of the output file, not of the input |
| 2733 | file. */ |
| 2734 | power = bfd_log2 (value); |
| 2735 | if (power > bfd_get_arch_info (abfd)->section_align_power) |
| 2736 | power = bfd_get_arch_info (abfd)->section_align_power; |
| 2737 | h->u.c.p->alignment_power = power; |
| 2738 | |
| 2739 | h->u.c.p->section = bfd_make_section_old_way (symbfd, |
| 2740 | "COMMON"); |
| 2741 | } |
| 2742 | else |
| 2743 | { |
| 2744 | /* Adjust the size of the common symbol if |
| 2745 | necessary. */ |
| 2746 | if (value > h->u.c.size) |
| 2747 | h->u.c.size = value; |
| 2748 | } |
| 2749 | } |
| 2750 | } |
| 2751 | } |
| 2752 | |
| 2753 | /* We do not need this object file. */ |
| 2754 | return TRUE; |
| 2755 | } |
| 2756 | |
| 2757 | /* Check a single archive element to see if we need to include it in |
| 2758 | the link. *PNEEDED is set according to whether this element is |
| 2759 | needed in the link or not. This is called from |
| 2760 | _bfd_generic_link_add_archive_symbols. */ |
| 2761 | |
| 2762 | static bfd_boolean |
| 2763 | aout_link_check_archive_element (bfd *abfd, |
| 2764 | struct bfd_link_info *info, |
| 2765 | struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED, |
| 2766 | const char *name ATTRIBUTE_UNUSED, |
| 2767 | bfd_boolean *pneeded) |
| 2768 | { |
| 2769 | bfd *oldbfd; |
| 2770 | bfd_boolean needed; |
| 2771 | |
| 2772 | if (!aout_get_external_symbols (abfd)) |
| 2773 | return FALSE; |
| 2774 | |
| 2775 | oldbfd = abfd; |
| 2776 | if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd)) |
| 2777 | return FALSE; |
| 2778 | |
| 2779 | needed = *pneeded; |
| 2780 | if (needed) |
| 2781 | { |
| 2782 | /* Potentially, the add_archive_element hook may have set a |
| 2783 | substitute BFD for us. */ |
| 2784 | if (abfd != oldbfd) |
| 2785 | { |
| 2786 | if (!info->keep_memory |
| 2787 | && !aout_link_free_symbols (oldbfd)) |
| 2788 | return FALSE; |
| 2789 | if (!aout_get_external_symbols (abfd)) |
| 2790 | return FALSE; |
| 2791 | } |
| 2792 | if (!aout_link_add_symbols (abfd, info)) |
| 2793 | return FALSE; |
| 2794 | } |
| 2795 | |
| 2796 | if (!info->keep_memory || !needed) |
| 2797 | { |
| 2798 | if (!aout_link_free_symbols (abfd)) |
| 2799 | return FALSE; |
| 2800 | } |
| 2801 | |
| 2802 | return TRUE; |
| 2803 | } |
| 2804 | |
| 2805 | /* Add all symbols from an object file to the hash table. */ |
| 2806 | |
| 2807 | static bfd_boolean |
| 2808 | aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
| 2809 | { |
| 2810 | bfd_boolean (*add_one_symbol) |
| 2811 | (struct bfd_link_info *, bfd *, const char *, flagword, asection *, |
| 2812 | bfd_vma, const char *, bfd_boolean, bfd_boolean, |
| 2813 | struct bfd_link_hash_entry **); |
| 2814 | struct external_nlist *syms; |
| 2815 | bfd_size_type sym_count; |
| 2816 | char *strings; |
| 2817 | bfd_boolean copy; |
| 2818 | struct aout_link_hash_entry **sym_hash; |
| 2819 | struct external_nlist *p; |
| 2820 | struct external_nlist *pend; |
| 2821 | |
| 2822 | syms = obj_aout_external_syms (abfd); |
| 2823 | sym_count = obj_aout_external_sym_count (abfd); |
| 2824 | strings = obj_aout_external_strings (abfd); |
| 2825 | if (info->keep_memory) |
| 2826 | copy = FALSE; |
| 2827 | else |
| 2828 | copy = TRUE; |
| 2829 | |
| 2830 | if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) |
| 2831 | { |
| 2832 | if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) |
| 2833 | (abfd, info, &syms, &sym_count, &strings))) |
| 2834 | return FALSE; |
| 2835 | } |
| 2836 | |
| 2837 | /* We keep a list of the linker hash table entries that correspond |
| 2838 | to particular symbols. We could just look them up in the hash |
| 2839 | table, but keeping the list is more efficient. Perhaps this |
| 2840 | should be conditional on info->keep_memory. */ |
| 2841 | sym_hash = bfd_alloc (abfd, |
| 2842 | sym_count * sizeof (struct aout_link_hash_entry *)); |
| 2843 | if (sym_hash == NULL && sym_count != 0) |
| 2844 | return FALSE; |
| 2845 | obj_aout_sym_hashes (abfd) = sym_hash; |
| 2846 | |
| 2847 | add_one_symbol = aout_backend_info (abfd)->add_one_symbol; |
| 2848 | if (add_one_symbol == NULL) |
| 2849 | add_one_symbol = _bfd_generic_link_add_one_symbol; |
| 2850 | |
| 2851 | p = syms; |
| 2852 | pend = p + sym_count; |
| 2853 | for (; p < pend; p++, sym_hash++) |
| 2854 | { |
| 2855 | int type; |
| 2856 | const char *name; |
| 2857 | bfd_vma value; |
| 2858 | asection *section; |
| 2859 | flagword flags; |
| 2860 | const char *string; |
| 2861 | |
| 2862 | *sym_hash = NULL; |
| 2863 | |
| 2864 | type = H_GET_8 (abfd, p->e_type); |
| 2865 | |
| 2866 | /* PR 19629: Corrupt binaries can contain illegal string offsets. */ |
| 2867 | if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) |
| 2868 | return FALSE; |
| 2869 | name = strings + GET_WORD (abfd, p->e_strx); |
| 2870 | value = GET_WORD (abfd, p->e_value); |
| 2871 | flags = BSF_GLOBAL; |
| 2872 | string = NULL; |
| 2873 | switch (type) |
| 2874 | { |
| 2875 | default: |
| 2876 | /* Anything else should be a debugging symbol. */ |
| 2877 | BFD_ASSERT ((type & N_STAB) != 0); |
| 2878 | continue; |
| 2879 | |
| 2880 | case N_UNDF: |
| 2881 | case N_ABS: |
| 2882 | case N_TEXT: |
| 2883 | case N_DATA: |
| 2884 | case N_BSS: |
| 2885 | case N_REG: |
| 2886 | case N_FN: |
| 2887 | /* Ignore symbols that are not externally visible. */ |
| 2888 | continue; |
| 2889 | |
| 2890 | case N_UNDF | N_EXT: |
| 2891 | if (value == 0) |
| 2892 | { |
| 2893 | section = bfd_und_section_ptr; |
| 2894 | flags = 0; |
| 2895 | } |
| 2896 | else |
| 2897 | section = bfd_com_section_ptr; |
| 2898 | break; |
| 2899 | case N_ABS | N_EXT: |
| 2900 | section = bfd_abs_section_ptr; |
| 2901 | break; |
| 2902 | case N_TEXT | N_EXT: |
| 2903 | section = obj_textsec (abfd); |
| 2904 | value -= bfd_section_vma (section); |
| 2905 | break; |
| 2906 | case N_DATA | N_EXT: |
| 2907 | /* Treat N_SETV symbols as N_DATA symbol; see comment in |
| 2908 | translate_from_native_sym_flags. */ |
| 2909 | section = obj_datasec (abfd); |
| 2910 | value -= bfd_section_vma (section); |
| 2911 | break; |
| 2912 | case N_BSS | N_EXT: |
| 2913 | section = obj_bsssec (abfd); |
| 2914 | value -= bfd_section_vma (section); |
| 2915 | break; |
| 2916 | } |
| 2917 | |
| 2918 | if (! ((*add_one_symbol) |
| 2919 | (info, abfd, name, flags, section, value, string, copy, FALSE, |
| 2920 | (struct bfd_link_hash_entry **) sym_hash))) |
| 2921 | return FALSE; |
| 2922 | |
| 2923 | /* Restrict the maximum alignment of a common symbol based on |
| 2924 | the architecture, since a.out has no way to represent |
| 2925 | alignment requirements of a section in a .o file. FIXME: |
| 2926 | This isn't quite right: it should use the architecture of the |
| 2927 | output file, not the input files. */ |
| 2928 | if ((*sym_hash)->root.type == bfd_link_hash_common |
| 2929 | && ((*sym_hash)->root.u.c.p->alignment_power > |
| 2930 | bfd_get_arch_info (abfd)->section_align_power)) |
| 2931 | (*sym_hash)->root.u.c.p->alignment_power = |
| 2932 | bfd_get_arch_info (abfd)->section_align_power; |
| 2933 | |
| 2934 | /* If this is a set symbol, and we are not building sets, then |
| 2935 | it is possible for the hash entry to not have been set. In |
| 2936 | such a case, treat the symbol as not globally defined. */ |
| 2937 | if ((*sym_hash)->root.type == bfd_link_hash_new) |
| 2938 | { |
| 2939 | BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); |
| 2940 | *sym_hash = NULL; |
| 2941 | } |
| 2942 | } |
| 2943 | |
| 2944 | return TRUE; |
| 2945 | } |
| 2946 | \f |
| 2947 | /* Look up an entry in an the header file hash table. */ |
| 2948 | |
| 2949 | #define aout_link_includes_lookup(table, string, create, copy) \ |
| 2950 | ((struct aout_link_includes_entry *) \ |
| 2951 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) |
| 2952 | |
| 2953 | /* The function to create a new entry in the header file hash table. */ |
| 2954 | |
| 2955 | static struct bfd_hash_entry * |
| 2956 | aout_link_includes_newfunc (struct bfd_hash_entry *entry, |
| 2957 | struct bfd_hash_table *table, |
| 2958 | const char *string) |
| 2959 | { |
| 2960 | struct aout_link_includes_entry * ret = |
| 2961 | (struct aout_link_includes_entry *) entry; |
| 2962 | |
| 2963 | /* Allocate the structure if it has not already been allocated by a |
| 2964 | subclass. */ |
| 2965 | if (ret == NULL) |
| 2966 | ret = bfd_hash_allocate (table, |
| 2967 | sizeof (struct aout_link_includes_entry)); |
| 2968 | if (ret == NULL) |
| 2969 | return NULL; |
| 2970 | |
| 2971 | /* Call the allocation method of the superclass. */ |
| 2972 | ret = ((struct aout_link_includes_entry *) |
| 2973 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); |
| 2974 | if (ret) |
| 2975 | /* Set local fields. */ |
| 2976 | ret->totals = NULL; |
| 2977 | |
| 2978 | return (struct bfd_hash_entry *) ret; |
| 2979 | } |
| 2980 | |
| 2981 | /* Write out a symbol that was not associated with an a.out input |
| 2982 | object. */ |
| 2983 | |
| 2984 | static bfd_boolean |
| 2985 | aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data) |
| 2986 | { |
| 2987 | struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh; |
| 2988 | struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data; |
| 2989 | bfd *output_bfd; |
| 2990 | int type; |
| 2991 | bfd_vma val; |
| 2992 | struct external_nlist outsym; |
| 2993 | bfd_size_type indx; |
| 2994 | size_t amt; |
| 2995 | |
| 2996 | if (h->root.type == bfd_link_hash_warning) |
| 2997 | { |
| 2998 | h = (struct aout_link_hash_entry *) h->root.u.i.link; |
| 2999 | if (h->root.type == bfd_link_hash_new) |
| 3000 | return TRUE; |
| 3001 | } |
| 3002 | |
| 3003 | output_bfd = flaginfo->output_bfd; |
| 3004 | |
| 3005 | if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) |
| 3006 | { |
| 3007 | if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) |
| 3008 | (output_bfd, flaginfo->info, h))) |
| 3009 | { |
| 3010 | /* FIXME: No way to handle errors. */ |
| 3011 | abort (); |
| 3012 | } |
| 3013 | } |
| 3014 | |
| 3015 | if (h->written) |
| 3016 | return TRUE; |
| 3017 | |
| 3018 | h->written = TRUE; |
| 3019 | |
| 3020 | /* An indx of -2 means the symbol must be written. */ |
| 3021 | if (h->indx != -2 |
| 3022 | && (flaginfo->info->strip == strip_all |
| 3023 | || (flaginfo->info->strip == strip_some |
| 3024 | && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string, |
| 3025 | FALSE, FALSE) == NULL))) |
| 3026 | return TRUE; |
| 3027 | |
| 3028 | switch (h->root.type) |
| 3029 | { |
| 3030 | default: |
| 3031 | abort (); |
| 3032 | /* Avoid variable not initialized warnings. */ |
| 3033 | return TRUE; |
| 3034 | case bfd_link_hash_new: |
| 3035 | /* This can happen for set symbols when sets are not being |
| 3036 | built. */ |
| 3037 | return TRUE; |
| 3038 | case bfd_link_hash_undefined: |
| 3039 | type = N_UNDF | N_EXT; |
| 3040 | val = 0; |
| 3041 | break; |
| 3042 | case bfd_link_hash_defined: |
| 3043 | case bfd_link_hash_defweak: |
| 3044 | { |
| 3045 | asection *sec; |
| 3046 | |
| 3047 | sec = h->root.u.def.section->output_section; |
| 3048 | BFD_ASSERT (bfd_is_abs_section (sec) |
| 3049 | || sec->owner == output_bfd); |
| 3050 | if (sec == obj_textsec (output_bfd)) |
| 3051 | type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; |
| 3052 | else if (sec == obj_datasec (output_bfd)) |
| 3053 | type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; |
| 3054 | else if (sec == obj_bsssec (output_bfd)) |
| 3055 | type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; |
| 3056 | else |
| 3057 | type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; |
| 3058 | type |= N_EXT; |
| 3059 | val = (h->root.u.def.value |
| 3060 | + sec->vma |
| 3061 | + h->root.u.def.section->output_offset); |
| 3062 | } |
| 3063 | break; |
| 3064 | case bfd_link_hash_common: |
| 3065 | type = N_UNDF | N_EXT; |
| 3066 | val = h->root.u.c.size; |
| 3067 | break; |
| 3068 | case bfd_link_hash_undefweak: |
| 3069 | type = N_WEAKU; |
| 3070 | val = 0; |
| 3071 | /* Fall through. */ |
| 3072 | case bfd_link_hash_indirect: |
| 3073 | case bfd_link_hash_warning: |
| 3074 | /* FIXME: Ignore these for now. The circumstances under which |
| 3075 | they should be written out are not clear to me. */ |
| 3076 | return TRUE; |
| 3077 | } |
| 3078 | |
| 3079 | H_PUT_8 (output_bfd, type, outsym.e_type); |
| 3080 | indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string, |
| 3081 | FALSE); |
| 3082 | if (indx == (bfd_size_type) -1) |
| 3083 | /* FIXME: No way to handle errors. */ |
| 3084 | abort (); |
| 3085 | |
| 3086 | PUT_WORD (output_bfd, indx, outsym.e_strx); |
| 3087 | PUT_WORD (output_bfd, val, outsym.e_value); |
| 3088 | |
| 3089 | amt = EXTERNAL_NLIST_SIZE; |
| 3090 | if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0 |
| 3091 | || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) |
| 3092 | /* FIXME: No way to handle errors. */ |
| 3093 | abort (); |
| 3094 | |
| 3095 | flaginfo->symoff += amt; |
| 3096 | h->indx = obj_aout_external_sym_count (output_bfd); |
| 3097 | ++obj_aout_external_sym_count (output_bfd); |
| 3098 | |
| 3099 | return TRUE; |
| 3100 | } |
| 3101 | |
| 3102 | /* Handle a link order which is supposed to generate a reloc. */ |
| 3103 | |
| 3104 | static bfd_boolean |
| 3105 | aout_link_reloc_link_order (struct aout_final_link_info *flaginfo, |
| 3106 | asection *o, |
| 3107 | struct bfd_link_order *p) |
| 3108 | { |
| 3109 | struct bfd_link_order_reloc *pr; |
| 3110 | int r_index; |
| 3111 | int r_extern; |
| 3112 | reloc_howto_type *howto; |
| 3113 | file_ptr *reloff_ptr; |
| 3114 | struct reloc_std_external srel; |
| 3115 | void * rel_ptr; |
| 3116 | bfd_size_type rel_size; |
| 3117 | |
| 3118 | pr = p->u.reloc.p; |
| 3119 | |
| 3120 | if (p->type == bfd_section_reloc_link_order) |
| 3121 | { |
| 3122 | r_extern = 0; |
| 3123 | if (bfd_is_abs_section (pr->u.section)) |
| 3124 | r_index = N_ABS | N_EXT; |
| 3125 | else |
| 3126 | { |
| 3127 | BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd); |
| 3128 | r_index = pr->u.section->target_index; |
| 3129 | } |
| 3130 | } |
| 3131 | else |
| 3132 | { |
| 3133 | struct aout_link_hash_entry *h; |
| 3134 | |
| 3135 | BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); |
| 3136 | r_extern = 1; |
| 3137 | h = ((struct aout_link_hash_entry *) |
| 3138 | bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info, |
| 3139 | pr->u.name, FALSE, FALSE, TRUE)); |
| 3140 | if (h != NULL |
| 3141 | && h->indx >= 0) |
| 3142 | r_index = h->indx; |
| 3143 | else if (h != NULL) |
| 3144 | { |
| 3145 | /* We decided to strip this symbol, but it turns out that we |
| 3146 | can't. Note that we lose the other and desc information |
| 3147 | here. I don't think that will ever matter for a global |
| 3148 | symbol. */ |
| 3149 | h->indx = -2; |
| 3150 | h->written = FALSE; |
| 3151 | if (!aout_link_write_other_symbol (&h->root.root, flaginfo)) |
| 3152 | return FALSE; |
| 3153 | r_index = h->indx; |
| 3154 | } |
| 3155 | else |
| 3156 | { |
| 3157 | (*flaginfo->info->callbacks->unattached_reloc) |
| 3158 | (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0); |
| 3159 | r_index = 0; |
| 3160 | } |
| 3161 | } |
| 3162 | |
| 3163 | howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc); |
| 3164 | if (howto == 0) |
| 3165 | { |
| 3166 | bfd_set_error (bfd_error_bad_value); |
| 3167 | return FALSE; |
| 3168 | } |
| 3169 | |
| 3170 | if (o == obj_textsec (flaginfo->output_bfd)) |
| 3171 | reloff_ptr = &flaginfo->treloff; |
| 3172 | else if (o == obj_datasec (flaginfo->output_bfd)) |
| 3173 | reloff_ptr = &flaginfo->dreloff; |
| 3174 | else |
| 3175 | abort (); |
| 3176 | |
| 3177 | #ifdef MY_put_reloc |
| 3178 | MY_put_reloc(flaginfo->output_bfd, r_extern, r_index, p->offset, howto, |
| 3179 | &srel); |
| 3180 | #else |
| 3181 | { |
| 3182 | int r_pcrel; |
| 3183 | int r_baserel; |
| 3184 | int r_jmptable; |
| 3185 | int r_relative; |
| 3186 | int r_length; |
| 3187 | |
| 3188 | fprintf (stderr, "TODO: line %d in bfd/pdp11.c\n", __LINE__); |
| 3189 | |
| 3190 | r_pcrel = howto->pc_relative; |
| 3191 | r_baserel = (howto->type & 8) != 0; |
| 3192 | r_jmptable = (howto->type & 16) != 0; |
| 3193 | r_relative = (howto->type & 32) != 0; |
| 3194 | r_length = howto->size; |
| 3195 | |
| 3196 | PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address); |
| 3197 | if (bfd_header_big_endian (flaginfo->output_bfd)) |
| 3198 | { |
| 3199 | srel.r_index[0] = r_index >> 16; |
| 3200 | srel.r_index[1] = r_index >> 8; |
| 3201 | srel.r_index[2] = r_index; |
| 3202 | srel.r_type[0] = |
| 3203 | ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) |
| 3204 | | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) |
| 3205 | | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) |
| 3206 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) |
| 3207 | | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) |
| 3208 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); |
| 3209 | } |
| 3210 | else |
| 3211 | { |
| 3212 | srel.r_index[2] = r_index >> 16; |
| 3213 | srel.r_index[1] = r_index >> 8; |
| 3214 | srel.r_index[0] = r_index; |
| 3215 | srel.r_type[0] = |
| 3216 | ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) |
| 3217 | | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) |
| 3218 | | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) |
| 3219 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) |
| 3220 | | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) |
| 3221 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); |
| 3222 | } |
| 3223 | } |
| 3224 | #endif |
| 3225 | rel_ptr = (void *) &srel; |
| 3226 | |
| 3227 | /* We have to write the addend into the object file, since |
| 3228 | standard a.out relocs are in place. It would be more |
| 3229 | reliable if we had the current contents of the file here, |
| 3230 | rather than assuming zeroes, but we can't read the file since |
| 3231 | it was opened using bfd_openw. */ |
| 3232 | if (pr->addend != 0) |
| 3233 | { |
| 3234 | bfd_size_type size; |
| 3235 | bfd_reloc_status_type r; |
| 3236 | bfd_byte *buf; |
| 3237 | bfd_boolean ok; |
| 3238 | |
| 3239 | size = bfd_get_reloc_size (howto); |
| 3240 | buf = bfd_zmalloc (size); |
| 3241 | if (buf == NULL && size != 0) |
| 3242 | return FALSE; |
| 3243 | r = MY_relocate_contents (howto, flaginfo->output_bfd, |
| 3244 | pr->addend, buf); |
| 3245 | switch (r) |
| 3246 | { |
| 3247 | case bfd_reloc_ok: |
| 3248 | break; |
| 3249 | default: |
| 3250 | case bfd_reloc_outofrange: |
| 3251 | abort (); |
| 3252 | case bfd_reloc_overflow: |
| 3253 | (*flaginfo->info->callbacks->reloc_overflow) |
| 3254 | (flaginfo->info, NULL, |
| 3255 | (p->type == bfd_section_reloc_link_order |
| 3256 | ? bfd_section_name (pr->u.section) |
| 3257 | : pr->u.name), |
| 3258 | howto->name, pr->addend, NULL, |
| 3259 | (asection *) NULL, (bfd_vma) 0); |
| 3260 | break; |
| 3261 | } |
| 3262 | ok = bfd_set_section_contents (flaginfo->output_bfd, o, |
| 3263 | (void *) buf, |
| 3264 | (file_ptr) p->offset, |
| 3265 | size); |
| 3266 | free (buf); |
| 3267 | if (! ok) |
| 3268 | return FALSE; |
| 3269 | } |
| 3270 | |
| 3271 | rel_size = obj_reloc_entry_size (flaginfo->output_bfd); |
| 3272 | if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 |
| 3273 | || bfd_bwrite (rel_ptr, rel_size, flaginfo->output_bfd) != rel_size) |
| 3274 | return FALSE; |
| 3275 | |
| 3276 | *reloff_ptr += rel_size; |
| 3277 | |
| 3278 | /* Assert that the relocs have not run into the symbols, and that n |
| 3279 | the text relocs have not run into the data relocs. */ |
| 3280 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) |
| 3281 | && (reloff_ptr != &flaginfo->treloff |
| 3282 | || (*reloff_ptr |
| 3283 | <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); |
| 3284 | |
| 3285 | return TRUE; |
| 3286 | } |
| 3287 | |
| 3288 | /* Get the section corresponding to a reloc index. */ |
| 3289 | |
| 3290 | static inline asection * |
| 3291 | aout_reloc_type_to_section (bfd *abfd, int type) |
| 3292 | { |
| 3293 | switch (type) |
| 3294 | { |
| 3295 | case RTEXT: return obj_textsec (abfd); |
| 3296 | case RDATA: return obj_datasec (abfd); |
| 3297 | case RBSS: return obj_bsssec (abfd); |
| 3298 | case RABS: return bfd_abs_section_ptr; |
| 3299 | case REXT: return bfd_und_section_ptr; |
| 3300 | default: abort (); |
| 3301 | } |
| 3302 | } |
| 3303 | |
| 3304 | static bfd_boolean |
| 3305 | pdp11_aout_link_input_section (struct aout_final_link_info *flaginfo, |
| 3306 | bfd *input_bfd, |
| 3307 | asection *input_section, |
| 3308 | bfd_byte *relocs, |
| 3309 | bfd_size_type rel_size, |
| 3310 | bfd_byte *contents) |
| 3311 | { |
| 3312 | bfd_boolean (*check_dynamic_reloc) |
| 3313 | (struct bfd_link_info *, bfd *, asection *, |
| 3314 | struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, |
| 3315 | bfd_vma *); |
| 3316 | bfd *output_bfd; |
| 3317 | bfd_boolean relocatable; |
| 3318 | struct external_nlist *syms; |
| 3319 | char *strings; |
| 3320 | struct aout_link_hash_entry **sym_hashes; |
| 3321 | int *symbol_map; |
| 3322 | bfd_byte *rel; |
| 3323 | bfd_byte *rel_end; |
| 3324 | |
| 3325 | output_bfd = flaginfo->output_bfd; |
| 3326 | check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; |
| 3327 | |
| 3328 | BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_SIZE); |
| 3329 | BFD_ASSERT (input_bfd->xvec->header_byteorder |
| 3330 | == output_bfd->xvec->header_byteorder); |
| 3331 | |
| 3332 | relocatable = bfd_link_relocatable (flaginfo->info); |
| 3333 | syms = obj_aout_external_syms (input_bfd); |
| 3334 | strings = obj_aout_external_strings (input_bfd); |
| 3335 | sym_hashes = obj_aout_sym_hashes (input_bfd); |
| 3336 | symbol_map = flaginfo->symbol_map; |
| 3337 | |
| 3338 | rel = relocs; |
| 3339 | rel_end = rel + rel_size; |
| 3340 | for (; rel < rel_end; rel += RELOC_SIZE) |
| 3341 | { |
| 3342 | bfd_vma r_addr; |
| 3343 | int r_index; |
| 3344 | int r_type; |
| 3345 | int r_pcrel; |
| 3346 | int r_extern; |
| 3347 | reloc_howto_type *howto; |
| 3348 | struct aout_link_hash_entry *h = NULL; |
| 3349 | bfd_vma relocation; |
| 3350 | bfd_reloc_status_type r; |
| 3351 | int reloc_entry; |
| 3352 | |
| 3353 | reloc_entry = GET_WORD (input_bfd, (void *) rel); |
| 3354 | if (reloc_entry == 0) |
| 3355 | continue; |
| 3356 | |
| 3357 | { |
| 3358 | unsigned int howto_idx; |
| 3359 | |
| 3360 | r_index = (reloc_entry & RIDXMASK) >> 4; |
| 3361 | r_type = reloc_entry & RTYPE; |
| 3362 | r_pcrel = reloc_entry & RELFLG; |
| 3363 | r_addr = (char *) rel - (char *) relocs; |
| 3364 | |
| 3365 | r_extern = (r_type == REXT); |
| 3366 | |
| 3367 | howto_idx = r_pcrel; |
| 3368 | if (howto_idx < TABLE_SIZE (howto_table_pdp11)) |
| 3369 | howto = howto_table_pdp11 + howto_idx; |
| 3370 | else |
| 3371 | { |
| 3372 | _bfd_error_handler (_("%pB: unsupported relocation type"), |
| 3373 | input_bfd); |
| 3374 | bfd_set_error (bfd_error_bad_value); |
| 3375 | return FALSE; |
| 3376 | } |
| 3377 | } |
| 3378 | |
| 3379 | if (relocatable) |
| 3380 | { |
| 3381 | /* We are generating a relocatable output file, and must |
| 3382 | modify the reloc accordingly. */ |
| 3383 | if (r_extern) |
| 3384 | { |
| 3385 | /* If we know the symbol this relocation is against, |
| 3386 | convert it into a relocation against a section. This |
| 3387 | is what the native linker does. */ |
| 3388 | h = sym_hashes[r_index]; |
| 3389 | if (h != NULL |
| 3390 | && (h->root.type == bfd_link_hash_defined |
| 3391 | || h->root.type == bfd_link_hash_defweak)) |
| 3392 | { |
| 3393 | asection *output_section; |
| 3394 | |
| 3395 | /* Compute a new r_index. */ |
| 3396 | output_section = h->root.u.def.section->output_section; |
| 3397 | if (output_section == obj_textsec (output_bfd)) |
| 3398 | r_type = N_TEXT; |
| 3399 | else if (output_section == obj_datasec (output_bfd)) |
| 3400 | r_type = N_DATA; |
| 3401 | else if (output_section == obj_bsssec (output_bfd)) |
| 3402 | r_type = N_BSS; |
| 3403 | else |
| 3404 | r_type = N_ABS; |
| 3405 | |
| 3406 | /* Add the symbol value and the section VMA to the |
| 3407 | addend stored in the contents. */ |
| 3408 | relocation = (h->root.u.def.value |
| 3409 | + output_section->vma |
| 3410 | + h->root.u.def.section->output_offset); |
| 3411 | } |
| 3412 | else |
| 3413 | { |
| 3414 | /* We must change r_index according to the symbol |
| 3415 | map. */ |
| 3416 | r_index = symbol_map[r_index]; |
| 3417 | |
| 3418 | if (r_index == -1) |
| 3419 | { |
| 3420 | if (h != NULL) |
| 3421 | { |
| 3422 | /* We decided to strip this symbol, but it |
| 3423 | turns out that we can't. Note that we |
| 3424 | lose the other and desc information here. |
| 3425 | I don't think that will ever matter for a |
| 3426 | global symbol. */ |
| 3427 | if (h->indx < 0) |
| 3428 | { |
| 3429 | h->indx = -2; |
| 3430 | h->written = FALSE; |
| 3431 | if (!aout_link_write_other_symbol (&h->root.root, |
| 3432 | flaginfo)) |
| 3433 | return FALSE; |
| 3434 | } |
| 3435 | r_index = h->indx; |
| 3436 | } |
| 3437 | else |
| 3438 | { |
| 3439 | const char *name; |
| 3440 | |
| 3441 | name = strings + GET_WORD (input_bfd, |
| 3442 | syms[r_index].e_strx); |
| 3443 | (*flaginfo->info->callbacks->unattached_reloc) |
| 3444 | (flaginfo->info, name, input_bfd, input_section, |
| 3445 | r_addr); |
| 3446 | r_index = 0; |
| 3447 | } |
| 3448 | } |
| 3449 | |
| 3450 | relocation = 0; |
| 3451 | } |
| 3452 | |
| 3453 | /* Write out the new r_index value. */ |
| 3454 | reloc_entry = GET_WORD (input_bfd, rel); |
| 3455 | reloc_entry &= RIDXMASK; |
| 3456 | reloc_entry |= r_index << 4; |
| 3457 | PUT_WORD (input_bfd, reloc_entry, rel); |
| 3458 | } |
| 3459 | else |
| 3460 | { |
| 3461 | asection *section; |
| 3462 | |
| 3463 | /* This is a relocation against a section. We must |
| 3464 | adjust by the amount that the section moved. */ |
| 3465 | section = aout_reloc_type_to_section (input_bfd, r_type); |
| 3466 | relocation = (section->output_section->vma |
| 3467 | + section->output_offset |
| 3468 | - section->vma); |
| 3469 | } |
| 3470 | |
| 3471 | /* Change the address of the relocation. */ |
| 3472 | fprintf (stderr, "TODO: change the address of the relocation\n"); |
| 3473 | |
| 3474 | /* Adjust a PC relative relocation by removing the reference |
| 3475 | to the original address in the section and including the |
| 3476 | reference to the new address. */ |
| 3477 | if (r_pcrel) |
| 3478 | relocation -= (input_section->output_section->vma |
| 3479 | + input_section->output_offset |
| 3480 | - input_section->vma); |
| 3481 | |
| 3482 | #ifdef MY_relocatable_reloc |
| 3483 | MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); |
| 3484 | #endif |
| 3485 | |
| 3486 | if (relocation == 0) |
| 3487 | r = bfd_reloc_ok; |
| 3488 | else |
| 3489 | r = MY_relocate_contents (howto, |
| 3490 | input_bfd, relocation, |
| 3491 | contents + r_addr); |
| 3492 | } |
| 3493 | else |
| 3494 | { |
| 3495 | bfd_boolean hundef; |
| 3496 | |
| 3497 | /* We are generating an executable, and must do a full |
| 3498 | relocation. */ |
| 3499 | hundef = FALSE; |
| 3500 | if (r_extern) |
| 3501 | { |
| 3502 | h = sym_hashes[r_index]; |
| 3503 | |
| 3504 | if (h != NULL |
| 3505 | && (h->root.type == bfd_link_hash_defined |
| 3506 | || h->root.type == bfd_link_hash_defweak)) |
| 3507 | { |
| 3508 | relocation = (h->root.u.def.value |
| 3509 | + h->root.u.def.section->output_section->vma |
| 3510 | + h->root.u.def.section->output_offset); |
| 3511 | } |
| 3512 | else if (h != NULL |
| 3513 | && h->root.type == bfd_link_hash_undefweak) |
| 3514 | relocation = 0; |
| 3515 | else |
| 3516 | { |
| 3517 | hundef = TRUE; |
| 3518 | relocation = 0; |
| 3519 | } |
| 3520 | } |
| 3521 | else |
| 3522 | { |
| 3523 | asection *section; |
| 3524 | |
| 3525 | section = aout_reloc_type_to_section (input_bfd, r_type); |
| 3526 | relocation = (section->output_section->vma |
| 3527 | + section->output_offset |
| 3528 | - section->vma); |
| 3529 | if (r_pcrel) |
| 3530 | relocation += input_section->vma; |
| 3531 | } |
| 3532 | |
| 3533 | if (check_dynamic_reloc != NULL) |
| 3534 | { |
| 3535 | bfd_boolean skip; |
| 3536 | |
| 3537 | if (! ((*check_dynamic_reloc) |
| 3538 | (flaginfo->info, input_bfd, input_section, h, |
| 3539 | (void *) rel, contents, &skip, &relocation))) |
| 3540 | return FALSE; |
| 3541 | if (skip) |
| 3542 | continue; |
| 3543 | } |
| 3544 | |
| 3545 | /* Now warn if a global symbol is undefined. We could not |
| 3546 | do this earlier, because check_dynamic_reloc might want |
| 3547 | to skip this reloc. */ |
| 3548 | if (hundef && ! bfd_link_pic (flaginfo->info)) |
| 3549 | { |
| 3550 | const char *name; |
| 3551 | |
| 3552 | if (h != NULL) |
| 3553 | name = h->root.root.string; |
| 3554 | else |
| 3555 | name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); |
| 3556 | (*flaginfo->info->callbacks->undefined_symbol) |
| 3557 | (flaginfo->info, name, input_bfd, input_section, |
| 3558 | r_addr, TRUE); |
| 3559 | } |
| 3560 | |
| 3561 | r = MY_final_link_relocate (howto, |
| 3562 | input_bfd, input_section, |
| 3563 | contents, r_addr, relocation, |
| 3564 | (bfd_vma) 0); |
| 3565 | } |
| 3566 | |
| 3567 | if (r != bfd_reloc_ok) |
| 3568 | { |
| 3569 | switch (r) |
| 3570 | { |
| 3571 | default: |
| 3572 | case bfd_reloc_outofrange: |
| 3573 | abort (); |
| 3574 | case bfd_reloc_overflow: |
| 3575 | { |
| 3576 | const char *name; |
| 3577 | |
| 3578 | if (h != NULL) |
| 3579 | name = NULL; |
| 3580 | else if (r_extern) |
| 3581 | name = strings + GET_WORD (input_bfd, |
| 3582 | syms[r_index].e_strx); |
| 3583 | else |
| 3584 | { |
| 3585 | asection *s; |
| 3586 | |
| 3587 | s = aout_reloc_type_to_section (input_bfd, r_type); |
| 3588 | name = bfd_section_name (s); |
| 3589 | } |
| 3590 | (*flaginfo->info->callbacks->reloc_overflow) |
| 3591 | (flaginfo->info, (h ? &h->root : NULL), name, howto->name, |
| 3592 | (bfd_vma) 0, input_bfd, input_section, r_addr); |
| 3593 | } |
| 3594 | break; |
| 3595 | } |
| 3596 | } |
| 3597 | } |
| 3598 | |
| 3599 | return TRUE; |
| 3600 | } |
| 3601 | |
| 3602 | /* Link an a.out section into the output file. */ |
| 3603 | |
| 3604 | static bfd_boolean |
| 3605 | aout_link_input_section (struct aout_final_link_info *flaginfo, |
| 3606 | bfd *input_bfd, |
| 3607 | asection *input_section, |
| 3608 | file_ptr *reloff_ptr, |
| 3609 | bfd_size_type rel_size) |
| 3610 | { |
| 3611 | bfd_size_type input_size; |
| 3612 | void * relocs; |
| 3613 | |
| 3614 | /* Get the section contents. */ |
| 3615 | input_size = input_section->size; |
| 3616 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 3617 | (void *) flaginfo->contents, |
| 3618 | (file_ptr) 0, input_size)) |
| 3619 | return FALSE; |
| 3620 | |
| 3621 | /* Read in the relocs if we haven't already done it. */ |
| 3622 | if (aout_section_data (input_section) != NULL |
| 3623 | && aout_section_data (input_section)->relocs != NULL) |
| 3624 | relocs = aout_section_data (input_section)->relocs; |
| 3625 | else |
| 3626 | { |
| 3627 | relocs = flaginfo->relocs; |
| 3628 | if (rel_size > 0) |
| 3629 | { |
| 3630 | if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 |
| 3631 | || bfd_bread (relocs, rel_size, input_bfd) != rel_size) |
| 3632 | return FALSE; |
| 3633 | } |
| 3634 | } |
| 3635 | |
| 3636 | /* Relocate the section contents. */ |
| 3637 | if (! pdp11_aout_link_input_section (flaginfo, input_bfd, input_section, |
| 3638 | (bfd_byte *) relocs, |
| 3639 | rel_size, flaginfo->contents)) |
| 3640 | return FALSE; |
| 3641 | |
| 3642 | /* Write out the section contents. */ |
| 3643 | if (! bfd_set_section_contents (flaginfo->output_bfd, |
| 3644 | input_section->output_section, |
| 3645 | (void *) flaginfo->contents, |
| 3646 | (file_ptr) input_section->output_offset, |
| 3647 | input_size)) |
| 3648 | return FALSE; |
| 3649 | |
| 3650 | /* If we are producing relocatable output, the relocs were |
| 3651 | modified, and we now write them out. */ |
| 3652 | if (bfd_link_relocatable (flaginfo->info) && rel_size > 0) |
| 3653 | { |
| 3654 | if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) |
| 3655 | return FALSE; |
| 3656 | if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size) |
| 3657 | return FALSE; |
| 3658 | *reloff_ptr += rel_size; |
| 3659 | |
| 3660 | /* Assert that the relocs have not run into the symbols, and |
| 3661 | that if these are the text relocs they have not run into the |
| 3662 | data relocs. */ |
| 3663 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) |
| 3664 | && (reloff_ptr != &flaginfo->treloff |
| 3665 | || (*reloff_ptr |
| 3666 | <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); |
| 3667 | } |
| 3668 | |
| 3669 | return TRUE; |
| 3670 | } |
| 3671 | |
| 3672 | /* Link an a.out input BFD into the output file. */ |
| 3673 | |
| 3674 | static bfd_boolean |
| 3675 | aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd) |
| 3676 | { |
| 3677 | BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); |
| 3678 | |
| 3679 | /* If this is a dynamic object, it may need special handling. */ |
| 3680 | if ((input_bfd->flags & DYNAMIC) != 0 |
| 3681 | && aout_backend_info (input_bfd)->link_dynamic_object != NULL) |
| 3682 | return ((*aout_backend_info (input_bfd)->link_dynamic_object) |
| 3683 | (flaginfo->info, input_bfd)); |
| 3684 | |
| 3685 | /* Get the symbols. We probably have them already, unless |
| 3686 | flaginfo->info->keep_memory is FALSE. */ |
| 3687 | if (! aout_get_external_symbols (input_bfd)) |
| 3688 | return FALSE; |
| 3689 | |
| 3690 | /* Write out the symbols and get a map of the new indices. The map |
| 3691 | is placed into flaginfo->symbol_map. */ |
| 3692 | if (! aout_link_write_symbols (flaginfo, input_bfd)) |
| 3693 | return FALSE; |
| 3694 | |
| 3695 | /* Relocate and write out the sections. These functions use the |
| 3696 | symbol map created by aout_link_write_symbols. The linker_mark |
| 3697 | field will be set if these sections are to be included in the |
| 3698 | link, which will normally be the case. */ |
| 3699 | if (obj_textsec (input_bfd)->linker_mark) |
| 3700 | { |
| 3701 | if (! aout_link_input_section (flaginfo, input_bfd, |
| 3702 | obj_textsec (input_bfd), |
| 3703 | &flaginfo->treloff, |
| 3704 | exec_hdr (input_bfd)->a_trsize)) |
| 3705 | return FALSE; |
| 3706 | } |
| 3707 | if (obj_datasec (input_bfd)->linker_mark) |
| 3708 | { |
| 3709 | if (! aout_link_input_section (flaginfo, input_bfd, |
| 3710 | obj_datasec (input_bfd), |
| 3711 | &flaginfo->dreloff, |
| 3712 | exec_hdr (input_bfd)->a_drsize)) |
| 3713 | return FALSE; |
| 3714 | } |
| 3715 | |
| 3716 | /* If we are not keeping memory, we don't need the symbols any |
| 3717 | longer. We still need them if we are keeping memory, because the |
| 3718 | strings in the hash table point into them. */ |
| 3719 | if (! flaginfo->info->keep_memory) |
| 3720 | { |
| 3721 | if (! aout_link_free_symbols (input_bfd)) |
| 3722 | return FALSE; |
| 3723 | } |
| 3724 | |
| 3725 | return TRUE; |
| 3726 | } |
| 3727 | |
| 3728 | /* Do the final link step. This is called on the output BFD. The |
| 3729 | INFO structure should point to a list of BFDs linked through the |
| 3730 | link.next field which can be used to find each BFD which takes part |
| 3731 | in the output. Also, each section in ABFD should point to a list |
| 3732 | of bfd_link_order structures which list all the input sections for |
| 3733 | the output section. */ |
| 3734 | |
| 3735 | bfd_boolean |
| 3736 | NAME (aout, final_link) (bfd *abfd, |
| 3737 | struct bfd_link_info *info, |
| 3738 | void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) |
| 3739 | { |
| 3740 | struct aout_final_link_info aout_info; |
| 3741 | bfd_boolean includes_hash_initialized = FALSE; |
| 3742 | bfd *sub; |
| 3743 | bfd_size_type trsize, drsize; |
| 3744 | bfd_size_type max_contents_size; |
| 3745 | bfd_size_type max_relocs_size; |
| 3746 | bfd_size_type max_sym_count; |
| 3747 | struct bfd_link_order *p; |
| 3748 | asection *o; |
| 3749 | bfd_boolean have_link_order_relocs; |
| 3750 | |
| 3751 | if (bfd_link_pic (info)) |
| 3752 | abfd->flags |= DYNAMIC; |
| 3753 | |
| 3754 | separate_i_d = info->separate_code; |
| 3755 | aout_info.info = info; |
| 3756 | aout_info.output_bfd = abfd; |
| 3757 | aout_info.contents = NULL; |
| 3758 | aout_info.relocs = NULL; |
| 3759 | aout_info.symbol_map = NULL; |
| 3760 | aout_info.output_syms = NULL; |
| 3761 | |
| 3762 | if (!bfd_hash_table_init_n (&aout_info.includes.root, |
| 3763 | aout_link_includes_newfunc, |
| 3764 | sizeof (struct aout_link_includes_entry), |
| 3765 | 251)) |
| 3766 | goto error_return; |
| 3767 | includes_hash_initialized = TRUE; |
| 3768 | |
| 3769 | /* Figure out the largest section size. Also, if generating |
| 3770 | relocatable output, count the relocs. */ |
| 3771 | trsize = 0; |
| 3772 | drsize = 0; |
| 3773 | max_contents_size = 0; |
| 3774 | max_relocs_size = 0; |
| 3775 | max_sym_count = 0; |
| 3776 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3777 | { |
| 3778 | size_t sz; |
| 3779 | |
| 3780 | if (bfd_link_relocatable (info)) |
| 3781 | { |
| 3782 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) |
| 3783 | { |
| 3784 | trsize += exec_hdr (sub)->a_trsize; |
| 3785 | drsize += exec_hdr (sub)->a_drsize; |
| 3786 | } |
| 3787 | else |
| 3788 | { |
| 3789 | /* FIXME: We need to identify the .text and .data sections |
| 3790 | and call get_reloc_upper_bound and canonicalize_reloc to |
| 3791 | work out the number of relocs needed, and then multiply |
| 3792 | by the reloc size. */ |
| 3793 | _bfd_error_handler |
| 3794 | /* xgettext:c-format */ |
| 3795 | (_("%pB: relocatable link from %s to %s not supported"), |
| 3796 | abfd, sub->xvec->name, abfd->xvec->name); |
| 3797 | bfd_set_error (bfd_error_invalid_operation); |
| 3798 | goto error_return; |
| 3799 | } |
| 3800 | } |
| 3801 | |
| 3802 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) |
| 3803 | { |
| 3804 | sz = obj_textsec (sub)->size; |
| 3805 | if (sz > max_contents_size) |
| 3806 | max_contents_size = sz; |
| 3807 | sz = obj_datasec (sub)->size; |
| 3808 | if (sz > max_contents_size) |
| 3809 | max_contents_size = sz; |
| 3810 | |
| 3811 | sz = exec_hdr (sub)->a_trsize; |
| 3812 | if (sz > max_relocs_size) |
| 3813 | max_relocs_size = sz; |
| 3814 | sz = exec_hdr (sub)->a_drsize; |
| 3815 | if (sz > max_relocs_size) |
| 3816 | max_relocs_size = sz; |
| 3817 | |
| 3818 | sz = obj_aout_external_sym_count (sub); |
| 3819 | if (sz > max_sym_count) |
| 3820 | max_sym_count = sz; |
| 3821 | } |
| 3822 | } |
| 3823 | |
| 3824 | if (bfd_link_relocatable (info)) |
| 3825 | { |
| 3826 | if (obj_textsec (abfd) != NULL) |
| 3827 | trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) |
| 3828 | ->map_head.link_order) |
| 3829 | * obj_reloc_entry_size (abfd)); |
| 3830 | if (obj_datasec (abfd) != NULL) |
| 3831 | drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) |
| 3832 | ->map_head.link_order) |
| 3833 | * obj_reloc_entry_size (abfd)); |
| 3834 | } |
| 3835 | |
| 3836 | exec_hdr (abfd)->a_trsize = trsize; |
| 3837 | exec_hdr (abfd)->a_drsize = drsize; |
| 3838 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); |
| 3839 | |
| 3840 | /* Adjust the section sizes and vmas according to the magic number. |
| 3841 | This sets a_text, a_data and a_bss in the exec_hdr and sets the |
| 3842 | filepos for each section. */ |
| 3843 | if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) |
| 3844 | goto error_return; |
| 3845 | |
| 3846 | /* The relocation and symbol file positions differ among a.out |
| 3847 | targets. We are passed a callback routine from the backend |
| 3848 | specific code to handle this. |
| 3849 | FIXME: At this point we do not know how much space the symbol |
| 3850 | table will require. This will not work for any (nonstandard) |
| 3851 | a.out target that needs to know the symbol table size before it |
| 3852 | can compute the relocation file positions. */ |
| 3853 | (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, |
| 3854 | &aout_info.symoff); |
| 3855 | obj_textsec (abfd)->rel_filepos = aout_info.treloff; |
| 3856 | obj_datasec (abfd)->rel_filepos = aout_info.dreloff; |
| 3857 | obj_sym_filepos (abfd) = aout_info.symoff; |
| 3858 | |
| 3859 | /* We keep a count of the symbols as we output them. */ |
| 3860 | obj_aout_external_sym_count (abfd) = 0; |
| 3861 | |
| 3862 | /* We accumulate the string table as we write out the symbols. */ |
| 3863 | aout_info.strtab = _bfd_stringtab_init (); |
| 3864 | if (aout_info.strtab == NULL) |
| 3865 | goto error_return; |
| 3866 | |
| 3867 | /* Allocate buffers to hold section contents and relocs. */ |
| 3868 | aout_info.contents = bfd_malloc (max_contents_size); |
| 3869 | aout_info.relocs = bfd_malloc (max_relocs_size); |
| 3870 | aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *)); |
| 3871 | aout_info.output_syms = bfd_malloc ((max_sym_count + 1) |
| 3872 | * sizeof (struct external_nlist)); |
| 3873 | if ((aout_info.contents == NULL && max_contents_size != 0) |
| 3874 | || (aout_info.relocs == NULL && max_relocs_size != 0) |
| 3875 | || (aout_info.symbol_map == NULL && max_sym_count != 0) |
| 3876 | || aout_info.output_syms == NULL) |
| 3877 | goto error_return; |
| 3878 | |
| 3879 | /* If we have a symbol named __DYNAMIC, force it out now. This is |
| 3880 | required by SunOS. Doing this here rather than in sunos.c is a |
| 3881 | hack, but it's easier than exporting everything which would be |
| 3882 | needed. */ |
| 3883 | { |
| 3884 | struct aout_link_hash_entry *h; |
| 3885 | |
| 3886 | h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", |
| 3887 | FALSE, FALSE, FALSE); |
| 3888 | if (h != NULL) |
| 3889 | aout_link_write_other_symbol (&h->root.root, &aout_info); |
| 3890 | } |
| 3891 | |
| 3892 | /* The most time efficient way to do the link would be to read all |
| 3893 | the input object files into memory and then sort out the |
| 3894 | information into the output file. Unfortunately, that will |
| 3895 | probably use too much memory. Another method would be to step |
| 3896 | through everything that composes the text section and write it |
| 3897 | out, and then everything that composes the data section and write |
| 3898 | it out, and then write out the relocs, and then write out the |
| 3899 | symbols. Unfortunately, that requires reading stuff from each |
| 3900 | input file several times, and we will not be able to keep all the |
| 3901 | input files open simultaneously, and reopening them will be slow. |
| 3902 | |
| 3903 | What we do is basically process one input file at a time. We do |
| 3904 | everything we need to do with an input file once--copy over the |
| 3905 | section contents, handle the relocation information, and write |
| 3906 | out the symbols--and then we throw away the information we read |
| 3907 | from it. This approach requires a lot of lseeks of the output |
| 3908 | file, which is unfortunate but still faster than reopening a lot |
| 3909 | of files. |
| 3910 | |
| 3911 | We use the output_has_begun field of the input BFDs to see |
| 3912 | whether we have already handled it. */ |
| 3913 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3914 | sub->output_has_begun = FALSE; |
| 3915 | |
| 3916 | /* Mark all sections which are to be included in the link. This |
| 3917 | will normally be every section. We need to do this so that we |
| 3918 | can identify any sections which the linker has decided to not |
| 3919 | include. */ |
| 3920 | for (o = abfd->sections; o != NULL; o = o->next) |
| 3921 | { |
| 3922 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 3923 | if (p->type == bfd_indirect_link_order) |
| 3924 | p->u.indirect.section->linker_mark = TRUE; |
| 3925 | } |
| 3926 | |
| 3927 | have_link_order_relocs = FALSE; |
| 3928 | for (o = abfd->sections; o != NULL; o = o->next) |
| 3929 | { |
| 3930 | for (p = o->map_head.link_order; |
| 3931 | p != NULL; |
| 3932 | p = p->next) |
| 3933 | { |
| 3934 | if (p->type == bfd_indirect_link_order |
| 3935 | && (bfd_get_flavour (p->u.indirect.section->owner) |
| 3936 | == bfd_target_aout_flavour)) |
| 3937 | { |
| 3938 | bfd *input_bfd; |
| 3939 | |
| 3940 | input_bfd = p->u.indirect.section->owner; |
| 3941 | if (! input_bfd->output_has_begun) |
| 3942 | { |
| 3943 | if (! aout_link_input_bfd (&aout_info, input_bfd)) |
| 3944 | goto error_return; |
| 3945 | input_bfd->output_has_begun = TRUE; |
| 3946 | } |
| 3947 | } |
| 3948 | else if (p->type == bfd_section_reloc_link_order |
| 3949 | || p->type == bfd_symbol_reloc_link_order) |
| 3950 | /* These are handled below. */ |
| 3951 | have_link_order_relocs = TRUE; |
| 3952 | else |
| 3953 | { |
| 3954 | if (! _bfd_default_link_order (abfd, info, o, p)) |
| 3955 | goto error_return; |
| 3956 | } |
| 3957 | } |
| 3958 | } |
| 3959 | |
| 3960 | /* Write out any symbols that we have not already written out. */ |
| 3961 | bfd_hash_traverse (&info->hash->table, |
| 3962 | aout_link_write_other_symbol, |
| 3963 | &aout_info); |
| 3964 | |
| 3965 | /* Now handle any relocs we were asked to create by the linker. |
| 3966 | These did not come from any input file. We must do these after |
| 3967 | we have written out all the symbols, so that we know the symbol |
| 3968 | indices to use. */ |
| 3969 | if (have_link_order_relocs) |
| 3970 | { |
| 3971 | for (o = abfd->sections; o != NULL; o = o->next) |
| 3972 | { |
| 3973 | for (p = o->map_head.link_order; |
| 3974 | p != NULL; |
| 3975 | p = p->next) |
| 3976 | { |
| 3977 | if (p->type == bfd_section_reloc_link_order |
| 3978 | || p->type == bfd_symbol_reloc_link_order) |
| 3979 | { |
| 3980 | if (! aout_link_reloc_link_order (&aout_info, o, p)) |
| 3981 | goto error_return; |
| 3982 | } |
| 3983 | } |
| 3984 | } |
| 3985 | } |
| 3986 | |
| 3987 | free (aout_info.contents); |
| 3988 | aout_info.contents = NULL; |
| 3989 | free (aout_info.relocs); |
| 3990 | aout_info.relocs = NULL; |
| 3991 | free (aout_info.symbol_map); |
| 3992 | aout_info.symbol_map = NULL; |
| 3993 | free (aout_info.output_syms); |
| 3994 | aout_info.output_syms = NULL; |
| 3995 | if (includes_hash_initialized) |
| 3996 | { |
| 3997 | bfd_hash_table_free (&aout_info.includes.root); |
| 3998 | includes_hash_initialized = FALSE; |
| 3999 | } |
| 4000 | |
| 4001 | /* Finish up any dynamic linking we may be doing. */ |
| 4002 | if (aout_backend_info (abfd)->finish_dynamic_link != NULL) |
| 4003 | { |
| 4004 | if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) |
| 4005 | goto error_return; |
| 4006 | } |
| 4007 | |
| 4008 | /* Update the header information. */ |
| 4009 | abfd->symcount = obj_aout_external_sym_count (abfd); |
| 4010 | exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; |
| 4011 | obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; |
| 4012 | obj_textsec (abfd)->reloc_count = |
| 4013 | exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); |
| 4014 | obj_datasec (abfd)->reloc_count = |
| 4015 | exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); |
| 4016 | |
| 4017 | /* Write out the string table, unless there are no symbols. */ |
| 4018 | if (abfd->symcount > 0) |
| 4019 | { |
| 4020 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 |
| 4021 | || ! emit_stringtab (abfd, aout_info.strtab)) |
| 4022 | goto error_return; |
| 4023 | } |
| 4024 | else if (obj_textsec (abfd)->reloc_count == 0 |
| 4025 | && obj_datasec (abfd)->reloc_count == 0) |
| 4026 | { |
| 4027 | /* The layout of a typical a.out file is header, text, data, |
| 4028 | relocs, symbols, string table. When there are no relocs, |
| 4029 | symbols or string table, the last thing in the file is data |
| 4030 | and a_data may be rounded up. However we may have a smaller |
| 4031 | sized .data section and thus not written final padding. The |
| 4032 | same thing can happen with text if there is no data. Write |
| 4033 | final padding here to extend the file. */ |
| 4034 | file_ptr pos = 0; |
| 4035 | |
| 4036 | if (exec_hdr (abfd)->a_data > obj_datasec (abfd)->size) |
| 4037 | pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data; |
| 4038 | else if (obj_datasec (abfd)->size == 0 |
| 4039 | && exec_hdr (abfd)->a_text > obj_textsec (abfd)->size) |
| 4040 | pos = obj_textsec (abfd)->filepos + exec_hdr (abfd)->a_text; |
| 4041 | if (pos != 0) |
| 4042 | { |
| 4043 | bfd_byte b = 0; |
| 4044 | |
| 4045 | if (bfd_seek (abfd, pos - 1, SEEK_SET) != 0 |
| 4046 | || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) |
| 4047 | goto error_return; |
| 4048 | } |
| 4049 | } |
| 4050 | |
| 4051 | return TRUE; |
| 4052 | |
| 4053 | error_return: |
| 4054 | free (aout_info.contents); |
| 4055 | free (aout_info.relocs); |
| 4056 | free (aout_info.symbol_map); |
| 4057 | free (aout_info.output_syms); |
| 4058 | if (includes_hash_initialized) |
| 4059 | bfd_hash_table_free (&aout_info.includes.root); |
| 4060 | return FALSE; |
| 4061 | } |
| 4062 | |
| 4063 | /* Adjust and write out the symbols for an a.out file. Set the new |
| 4064 | symbol indices into a symbol_map. */ |
| 4065 | |
| 4066 | static bfd_boolean |
| 4067 | aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd) |
| 4068 | { |
| 4069 | bfd *output_bfd; |
| 4070 | bfd_size_type sym_count; |
| 4071 | char *strings; |
| 4072 | enum bfd_link_strip strip; |
| 4073 | enum bfd_link_discard discard; |
| 4074 | struct external_nlist *outsym; |
| 4075 | bfd_size_type strtab_index; |
| 4076 | struct external_nlist *sym; |
| 4077 | struct external_nlist *sym_end; |
| 4078 | struct aout_link_hash_entry **sym_hash; |
| 4079 | int *symbol_map; |
| 4080 | bfd_boolean pass; |
| 4081 | bfd_boolean skip_next; |
| 4082 | |
| 4083 | output_bfd = flaginfo->output_bfd; |
| 4084 | sym_count = obj_aout_external_sym_count (input_bfd); |
| 4085 | strings = obj_aout_external_strings (input_bfd); |
| 4086 | strip = flaginfo->info->strip; |
| 4087 | discard = flaginfo->info->discard; |
| 4088 | outsym = flaginfo->output_syms; |
| 4089 | |
| 4090 | /* First write out a symbol for this object file, unless we are |
| 4091 | discarding such symbols. */ |
| 4092 | if (strip != strip_all |
| 4093 | && (strip != strip_some |
| 4094 | || bfd_hash_lookup (flaginfo->info->keep_hash, |
| 4095 | bfd_get_filename (input_bfd), |
| 4096 | FALSE, FALSE) != NULL) |
| 4097 | && discard != discard_all) |
| 4098 | { |
| 4099 | H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); |
| 4100 | strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, |
| 4101 | bfd_get_filename (input_bfd), FALSE); |
| 4102 | if (strtab_index == (bfd_size_type) -1) |
| 4103 | return FALSE; |
| 4104 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); |
| 4105 | PUT_WORD (output_bfd, |
| 4106 | (bfd_section_vma (obj_textsec (input_bfd)->output_section) |
| 4107 | + obj_textsec (input_bfd)->output_offset), |
| 4108 | outsym->e_value); |
| 4109 | ++obj_aout_external_sym_count (output_bfd); |
| 4110 | ++outsym; |
| 4111 | } |
| 4112 | |
| 4113 | pass = FALSE; |
| 4114 | skip_next = FALSE; |
| 4115 | sym = obj_aout_external_syms (input_bfd); |
| 4116 | sym_end = sym + sym_count; |
| 4117 | sym_hash = obj_aout_sym_hashes (input_bfd); |
| 4118 | symbol_map = flaginfo->symbol_map; |
| 4119 | memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); |
| 4120 | for (; sym < sym_end; sym++, sym_hash++, symbol_map++) |
| 4121 | { |
| 4122 | const char *name; |
| 4123 | int type; |
| 4124 | struct aout_link_hash_entry *h; |
| 4125 | bfd_boolean skip; |
| 4126 | asection *symsec; |
| 4127 | bfd_vma val = 0; |
| 4128 | bfd_boolean copy; |
| 4129 | |
| 4130 | /* We set *symbol_map to 0 above for all symbols. If it has |
| 4131 | already been set to -1 for this symbol, it means that we are |
| 4132 | discarding it because it appears in a duplicate header file. |
| 4133 | See the N_BINCL code below. */ |
| 4134 | if (*symbol_map == -1) |
| 4135 | continue; |
| 4136 | |
| 4137 | /* Initialize *symbol_map to -1, which means that the symbol was |
| 4138 | not copied into the output file. We will change it later if |
| 4139 | we do copy the symbol over. */ |
| 4140 | *symbol_map = -1; |
| 4141 | |
| 4142 | type = H_GET_8 (input_bfd, sym->e_type); |
| 4143 | name = strings + GET_WORD (input_bfd, sym->e_strx); |
| 4144 | |
| 4145 | h = NULL; |
| 4146 | |
| 4147 | if (pass) |
| 4148 | { |
| 4149 | /* Pass this symbol through. It is the target of an |
| 4150 | indirect or warning symbol. */ |
| 4151 | val = GET_WORD (input_bfd, sym->e_value); |
| 4152 | pass = FALSE; |
| 4153 | } |
| 4154 | else if (skip_next) |
| 4155 | { |
| 4156 | /* Skip this symbol, which is the target of an indirect |
| 4157 | symbol that we have changed to no longer be an indirect |
| 4158 | symbol. */ |
| 4159 | skip_next = FALSE; |
| 4160 | continue; |
| 4161 | } |
| 4162 | else |
| 4163 | { |
| 4164 | struct aout_link_hash_entry *hresolve; |
| 4165 | |
| 4166 | /* We have saved the hash table entry for this symbol, if |
| 4167 | there is one. Note that we could just look it up again |
| 4168 | in the hash table, provided we first check that it is an |
| 4169 | external symbol. */ |
| 4170 | h = *sym_hash; |
| 4171 | |
| 4172 | /* Use the name from the hash table, in case the symbol was |
| 4173 | wrapped. */ |
| 4174 | if (h != NULL) |
| 4175 | name = h->root.root.string; |
| 4176 | |
| 4177 | /* If this is an indirect or warning symbol, then change |
| 4178 | hresolve to the base symbol. We also change *sym_hash so |
| 4179 | that the relocation routines relocate against the real |
| 4180 | symbol. */ |
| 4181 | hresolve = h; |
| 4182 | if (h != NULL |
| 4183 | && (h->root.type == bfd_link_hash_indirect |
| 4184 | || h->root.type == bfd_link_hash_warning)) |
| 4185 | { |
| 4186 | hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; |
| 4187 | while (hresolve->root.type == bfd_link_hash_indirect |
| 4188 | || hresolve->root.type == bfd_link_hash_warning) |
| 4189 | hresolve = ((struct aout_link_hash_entry *) |
| 4190 | hresolve->root.u.i.link); |
| 4191 | *sym_hash = hresolve; |
| 4192 | } |
| 4193 | |
| 4194 | /* If the symbol has already been written out, skip it. */ |
| 4195 | if (h != NULL |
| 4196 | && h->root.type != bfd_link_hash_warning |
| 4197 | && h->written) |
| 4198 | { |
| 4199 | if ((type & N_TYPE) == N_INDR |
| 4200 | || type == N_WARNING) |
| 4201 | skip_next = TRUE; |
| 4202 | *symbol_map = h->indx; |
| 4203 | continue; |
| 4204 | } |
| 4205 | |
| 4206 | /* See if we are stripping this symbol. */ |
| 4207 | skip = FALSE; |
| 4208 | switch (strip) |
| 4209 | { |
| 4210 | case strip_none: |
| 4211 | break; |
| 4212 | case strip_debugger: |
| 4213 | if ((type & N_STAB) != 0) |
| 4214 | skip = TRUE; |
| 4215 | break; |
| 4216 | case strip_some: |
| 4217 | if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE) |
| 4218 | == NULL) |
| 4219 | skip = TRUE; |
| 4220 | break; |
| 4221 | case strip_all: |
| 4222 | skip = TRUE; |
| 4223 | break; |
| 4224 | } |
| 4225 | if (skip) |
| 4226 | { |
| 4227 | if (h != NULL) |
| 4228 | h->written = TRUE; |
| 4229 | continue; |
| 4230 | } |
| 4231 | |
| 4232 | /* Get the value of the symbol. */ |
| 4233 | if ((type & N_TYPE) == N_TEXT |
| 4234 | || type == N_WEAKT) |
| 4235 | symsec = obj_textsec (input_bfd); |
| 4236 | else if ((type & N_TYPE) == N_DATA |
| 4237 | || type == N_WEAKD) |
| 4238 | symsec = obj_datasec (input_bfd); |
| 4239 | else if ((type & N_TYPE) == N_BSS |
| 4240 | || type == N_WEAKB) |
| 4241 | symsec = obj_bsssec (input_bfd); |
| 4242 | else if ((type & N_TYPE) == N_ABS |
| 4243 | || type == N_WEAKA) |
| 4244 | symsec = bfd_abs_section_ptr; |
| 4245 | else if (((type & N_TYPE) == N_INDR |
| 4246 | && (hresolve == NULL |
| 4247 | || (hresolve->root.type != bfd_link_hash_defined |
| 4248 | && hresolve->root.type != bfd_link_hash_defweak |
| 4249 | && hresolve->root.type != bfd_link_hash_common))) |
| 4250 | || type == N_WARNING) |
| 4251 | { |
| 4252 | /* Pass the next symbol through unchanged. The |
| 4253 | condition above for indirect symbols is so that if |
| 4254 | the indirect symbol was defined, we output it with |
| 4255 | the correct definition so the debugger will |
| 4256 | understand it. */ |
| 4257 | pass = TRUE; |
| 4258 | val = GET_WORD (input_bfd, sym->e_value); |
| 4259 | symsec = NULL; |
| 4260 | } |
| 4261 | else if ((type & N_STAB) != 0) |
| 4262 | { |
| 4263 | val = GET_WORD (input_bfd, sym->e_value); |
| 4264 | symsec = NULL; |
| 4265 | } |
| 4266 | else |
| 4267 | { |
| 4268 | /* If we get here with an indirect symbol, it means that |
| 4269 | we are outputting it with a real definition. In such |
| 4270 | a case we do not want to output the next symbol, |
| 4271 | which is the target of the indirection. */ |
| 4272 | if ((type & N_TYPE) == N_INDR) |
| 4273 | skip_next = TRUE; |
| 4274 | |
| 4275 | symsec = NULL; |
| 4276 | |
| 4277 | /* We need to get the value from the hash table. We use |
| 4278 | hresolve so that if we have defined an indirect |
| 4279 | symbol we output the final definition. */ |
| 4280 | if (h == NULL) |
| 4281 | { |
| 4282 | switch (type & N_TYPE) |
| 4283 | { |
| 4284 | case N_SETT: |
| 4285 | symsec = obj_textsec (input_bfd); |
| 4286 | break; |
| 4287 | case N_SETD: |
| 4288 | symsec = obj_datasec (input_bfd); |
| 4289 | break; |
| 4290 | case N_SETB: |
| 4291 | symsec = obj_bsssec (input_bfd); |
| 4292 | break; |
| 4293 | case N_SETA: |
| 4294 | symsec = bfd_abs_section_ptr; |
| 4295 | break; |
| 4296 | default: |
| 4297 | val = 0; |
| 4298 | break; |
| 4299 | } |
| 4300 | } |
| 4301 | else if (hresolve->root.type == bfd_link_hash_defined |
| 4302 | || hresolve->root.type == bfd_link_hash_defweak) |
| 4303 | { |
| 4304 | asection *input_section; |
| 4305 | asection *output_section; |
| 4306 | |
| 4307 | /* This case usually means a common symbol which was |
| 4308 | turned into a defined symbol. */ |
| 4309 | input_section = hresolve->root.u.def.section; |
| 4310 | output_section = input_section->output_section; |
| 4311 | BFD_ASSERT (bfd_is_abs_section (output_section) |
| 4312 | || output_section->owner == output_bfd); |
| 4313 | val = (hresolve->root.u.def.value |
| 4314 | + bfd_section_vma (output_section) |
| 4315 | + input_section->output_offset); |
| 4316 | |
| 4317 | /* Get the correct type based on the section. If |
| 4318 | this is a constructed set, force it to be |
| 4319 | globally visible. */ |
| 4320 | if (type == N_SETT |
| 4321 | || type == N_SETD |
| 4322 | || type == N_SETB |
| 4323 | || type == N_SETA) |
| 4324 | type |= N_EXT; |
| 4325 | |
| 4326 | type &=~ N_TYPE; |
| 4327 | |
| 4328 | if (output_section == obj_textsec (output_bfd)) |
| 4329 | type |= (hresolve->root.type == bfd_link_hash_defined |
| 4330 | ? N_TEXT |
| 4331 | : N_WEAKT); |
| 4332 | else if (output_section == obj_datasec (output_bfd)) |
| 4333 | type |= (hresolve->root.type == bfd_link_hash_defined |
| 4334 | ? N_DATA |
| 4335 | : N_WEAKD); |
| 4336 | else if (output_section == obj_bsssec (output_bfd)) |
| 4337 | type |= (hresolve->root.type == bfd_link_hash_defined |
| 4338 | ? N_BSS |
| 4339 | : N_WEAKB); |
| 4340 | else |
| 4341 | type |= (hresolve->root.type == bfd_link_hash_defined |
| 4342 | ? N_ABS |
| 4343 | : N_WEAKA); |
| 4344 | } |
| 4345 | else if (hresolve->root.type == bfd_link_hash_common) |
| 4346 | val = hresolve->root.u.c.size; |
| 4347 | else if (hresolve->root.type == bfd_link_hash_undefweak) |
| 4348 | { |
| 4349 | val = 0; |
| 4350 | type = N_WEAKU; |
| 4351 | } |
| 4352 | else |
| 4353 | val = 0; |
| 4354 | } |
| 4355 | if (symsec != NULL) |
| 4356 | val = (symsec->output_section->vma |
| 4357 | + symsec->output_offset |
| 4358 | + (GET_WORD (input_bfd, sym->e_value) |
| 4359 | - symsec->vma)); |
| 4360 | |
| 4361 | /* If this is a global symbol set the written flag, and if |
| 4362 | it is a local symbol see if we should discard it. */ |
| 4363 | if (h != NULL) |
| 4364 | { |
| 4365 | h->written = TRUE; |
| 4366 | h->indx = obj_aout_external_sym_count (output_bfd); |
| 4367 | } |
| 4368 | else if ((type & N_TYPE) != N_SETT |
| 4369 | && (type & N_TYPE) != N_SETD |
| 4370 | && (type & N_TYPE) != N_SETB |
| 4371 | && (type & N_TYPE) != N_SETA) |
| 4372 | { |
| 4373 | switch (discard) |
| 4374 | { |
| 4375 | case discard_none: |
| 4376 | case discard_sec_merge: |
| 4377 | break; |
| 4378 | case discard_l: |
| 4379 | if ((type & N_STAB) == 0 |
| 4380 | && bfd_is_local_label_name (input_bfd, name)) |
| 4381 | skip = TRUE; |
| 4382 | break; |
| 4383 | case discard_all: |
| 4384 | skip = TRUE; |
| 4385 | break; |
| 4386 | } |
| 4387 | if (skip) |
| 4388 | { |
| 4389 | pass = FALSE; |
| 4390 | continue; |
| 4391 | } |
| 4392 | } |
| 4393 | |
| 4394 | /* An N_BINCL symbol indicates the start of the stabs |
| 4395 | entries for a header file. We need to scan ahead to the |
| 4396 | next N_EINCL symbol, ignoring nesting, adding up all the |
| 4397 | characters in the symbol names, not including the file |
| 4398 | numbers in types (the first number after an open |
| 4399 | parenthesis). */ |
| 4400 | if (type == N_BINCL) |
| 4401 | { |
| 4402 | struct external_nlist *incl_sym; |
| 4403 | int nest; |
| 4404 | struct aout_link_includes_entry *incl_entry; |
| 4405 | struct aout_link_includes_totals *t; |
| 4406 | |
| 4407 | val = 0; |
| 4408 | nest = 0; |
| 4409 | for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) |
| 4410 | { |
| 4411 | int incl_type; |
| 4412 | |
| 4413 | incl_type = H_GET_8 (input_bfd, incl_sym->e_type); |
| 4414 | if (incl_type == N_EINCL) |
| 4415 | { |
| 4416 | if (nest == 0) |
| 4417 | break; |
| 4418 | --nest; |
| 4419 | } |
| 4420 | else if (incl_type == N_BINCL) |
| 4421 | ++nest; |
| 4422 | else if (nest == 0) |
| 4423 | { |
| 4424 | const char *s; |
| 4425 | |
| 4426 | s = strings + GET_WORD (input_bfd, incl_sym->e_strx); |
| 4427 | for (; *s != '\0'; s++) |
| 4428 | { |
| 4429 | val += *s; |
| 4430 | if (*s == '(') |
| 4431 | { |
| 4432 | /* Skip the file number. */ |
| 4433 | ++s; |
| 4434 | while (ISDIGIT (*s)) |
| 4435 | ++s; |
| 4436 | --s; |
| 4437 | } |
| 4438 | } |
| 4439 | } |
| 4440 | } |
| 4441 | |
| 4442 | /* If we have already included a header file with the |
| 4443 | same value, then replace this one with an N_EXCL |
| 4444 | symbol. */ |
| 4445 | copy = ! flaginfo->info->keep_memory; |
| 4446 | incl_entry = aout_link_includes_lookup (&flaginfo->includes, |
| 4447 | name, TRUE, copy); |
| 4448 | if (incl_entry == NULL) |
| 4449 | return FALSE; |
| 4450 | for (t = incl_entry->totals; t != NULL; t = t->next) |
| 4451 | if (t->total == val) |
| 4452 | break; |
| 4453 | if (t == NULL) |
| 4454 | { |
| 4455 | /* This is the first time we have seen this header |
| 4456 | file with this set of stabs strings. */ |
| 4457 | t = bfd_hash_allocate (&flaginfo->includes.root, |
| 4458 | sizeof *t); |
| 4459 | if (t == NULL) |
| 4460 | return FALSE; |
| 4461 | t->total = val; |
| 4462 | t->next = incl_entry->totals; |
| 4463 | incl_entry->totals = t; |
| 4464 | } |
| 4465 | else |
| 4466 | { |
| 4467 | int *incl_map; |
| 4468 | |
| 4469 | /* This is a duplicate header file. We must change |
| 4470 | it to be an N_EXCL entry, and mark all the |
| 4471 | included symbols to prevent outputting them. */ |
| 4472 | type = N_EXCL; |
| 4473 | |
| 4474 | nest = 0; |
| 4475 | for (incl_sym = sym + 1, incl_map = symbol_map + 1; |
| 4476 | incl_sym < sym_end; |
| 4477 | incl_sym++, incl_map++) |
| 4478 | { |
| 4479 | int incl_type; |
| 4480 | |
| 4481 | incl_type = H_GET_8 (input_bfd, incl_sym->e_type); |
| 4482 | if (incl_type == N_EINCL) |
| 4483 | { |
| 4484 | if (nest == 0) |
| 4485 | { |
| 4486 | *incl_map = -1; |
| 4487 | break; |
| 4488 | } |
| 4489 | --nest; |
| 4490 | } |
| 4491 | else if (incl_type == N_BINCL) |
| 4492 | ++nest; |
| 4493 | else if (nest == 0) |
| 4494 | *incl_map = -1; |
| 4495 | } |
| 4496 | } |
| 4497 | } |
| 4498 | } |
| 4499 | |
| 4500 | /* Copy this symbol into the list of symbols we are going to |
| 4501 | write out. */ |
| 4502 | H_PUT_8 (output_bfd, type, outsym->e_type); |
| 4503 | copy = FALSE; |
| 4504 | if (! flaginfo->info->keep_memory) |
| 4505 | { |
| 4506 | /* name points into a string table which we are going to |
| 4507 | free. If there is a hash table entry, use that string. |
| 4508 | Otherwise, copy name into memory. */ |
| 4509 | if (h != NULL) |
| 4510 | name = h->root.root.string; |
| 4511 | else |
| 4512 | copy = TRUE; |
| 4513 | } |
| 4514 | strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, |
| 4515 | name, copy); |
| 4516 | if (strtab_index == (bfd_size_type) -1) |
| 4517 | return FALSE; |
| 4518 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); |
| 4519 | PUT_WORD (output_bfd, val, outsym->e_value); |
| 4520 | *symbol_map = obj_aout_external_sym_count (output_bfd); |
| 4521 | ++obj_aout_external_sym_count (output_bfd); |
| 4522 | ++outsym; |
| 4523 | } |
| 4524 | |
| 4525 | /* Write out the output symbols we have just constructed. */ |
| 4526 | if (outsym > flaginfo->output_syms) |
| 4527 | { |
| 4528 | bfd_size_type size; |
| 4529 | |
| 4530 | if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0) |
| 4531 | return FALSE; |
| 4532 | size = outsym - flaginfo->output_syms; |
| 4533 | size *= EXTERNAL_NLIST_SIZE; |
| 4534 | if (bfd_bwrite ((void *) flaginfo->output_syms, size, output_bfd) != size) |
| 4535 | return FALSE; |
| 4536 | flaginfo->symoff += size; |
| 4537 | } |
| 4538 | |
| 4539 | return TRUE; |
| 4540 | } |
| 4541 | |
| 4542 | /* Write out a symbol that was not associated with an a.out input |
| 4543 | object. */ |
| 4544 | |
| 4545 | static bfd_vma |
| 4546 | bfd_getp32 (const void *p) |
| 4547 | { |
| 4548 | const bfd_byte *addr = p; |
| 4549 | unsigned long v; |
| 4550 | |
| 4551 | v = (unsigned long) addr[1] << 24; |
| 4552 | v |= (unsigned long) addr[0] << 16; |
| 4553 | v |= (unsigned long) addr[3] << 8; |
| 4554 | v |= (unsigned long) addr[2]; |
| 4555 | return v; |
| 4556 | } |
| 4557 | |
| 4558 | #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000) |
| 4559 | |
| 4560 | static bfd_signed_vma |
| 4561 | bfd_getp_signed_32 (const void *p) |
| 4562 | { |
| 4563 | const bfd_byte *addr = p; |
| 4564 | unsigned long v; |
| 4565 | |
| 4566 | v = (unsigned long) addr[1] << 24; |
| 4567 | v |= (unsigned long) addr[0] << 16; |
| 4568 | v |= (unsigned long) addr[3] << 8; |
| 4569 | v |= (unsigned long) addr[2]; |
| 4570 | return COERCE32 (v); |
| 4571 | } |
| 4572 | |
| 4573 | static void |
| 4574 | bfd_putp32 (bfd_vma data, void *p) |
| 4575 | { |
| 4576 | bfd_byte *addr = p; |
| 4577 | |
| 4578 | addr[0] = (data >> 16) & 0xff; |
| 4579 | addr[1] = (data >> 24) & 0xff; |
| 4580 | addr[2] = (data >> 0) & 0xff; |
| 4581 | addr[3] = (data >> 8) & 0xff; |
| 4582 | } |
| 4583 | |
| 4584 | const bfd_target MY (vec) = |
| 4585 | { |
| 4586 | TARGETNAME, /* Name. */ |
| 4587 | bfd_target_aout_flavour, |
| 4588 | BFD_ENDIAN_LITTLE, /* Target byte order (little). */ |
| 4589 | BFD_ENDIAN_LITTLE, /* Target headers byte order (little). */ |
| 4590 | (HAS_RELOC | EXEC_P | /* Object flags. */ |
| 4591 | HAS_LINENO | HAS_DEBUG | |
| 4592 | HAS_SYMS | HAS_LOCALS | WP_TEXT), |
| 4593 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 4594 | MY_symbol_leading_char, |
| 4595 | AR_PAD_CHAR, /* AR_pad_char. */ |
| 4596 | 15, /* AR_max_namelen. */ |
| 4597 | 0, /* match priority. */ |
| 4598 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 4599 | bfd_getp32, bfd_getp_signed_32, bfd_putp32, |
| 4600 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ |
| 4601 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 4602 | bfd_getp32, bfd_getp_signed_32, bfd_putp32, |
| 4603 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */ |
| 4604 | { /* bfd_check_format. */ |
| 4605 | _bfd_dummy_target, |
| 4606 | MY_object_p, |
| 4607 | bfd_generic_archive_p, |
| 4608 | MY_core_file_p |
| 4609 | }, |
| 4610 | { /* bfd_set_format. */ |
| 4611 | _bfd_bool_bfd_false_error, |
| 4612 | MY_mkobject, |
| 4613 | _bfd_generic_mkarchive, |
| 4614 | _bfd_bool_bfd_false_error |
| 4615 | }, |
| 4616 | { /* bfd_write_contents. */ |
| 4617 | _bfd_bool_bfd_false_error, |
| 4618 | MY_write_object_contents, |
| 4619 | _bfd_write_archive_contents, |
| 4620 | _bfd_bool_bfd_false_error |
| 4621 | }, |
| 4622 | |
| 4623 | BFD_JUMP_TABLE_GENERIC (MY), |
| 4624 | BFD_JUMP_TABLE_COPY (MY), |
| 4625 | BFD_JUMP_TABLE_CORE (MY), |
| 4626 | BFD_JUMP_TABLE_ARCHIVE (MY), |
| 4627 | BFD_JUMP_TABLE_SYMBOLS (MY), |
| 4628 | BFD_JUMP_TABLE_RELOCS (MY), |
| 4629 | BFD_JUMP_TABLE_WRITE (MY), |
| 4630 | BFD_JUMP_TABLE_LINK (MY), |
| 4631 | BFD_JUMP_TABLE_DYNAMIC (MY), |
| 4632 | |
| 4633 | /* Alternative_target. */ |
| 4634 | NULL, |
| 4635 | |
| 4636 | (void *) MY_backend_data |
| 4637 | }; |