1 /* BFD semi-generic back-end for a.out binaries. 2 Copyright (C) 1990-2014 Free Software Foundation, Inc. 3 Written by Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 /* 23 SECTION 24 a.out backends 25 26 DESCRIPTION 27 28 BFD supports a number of different flavours of a.out format, 29 though the major differences are only the sizes of the 30 structures on disk, and the shape of the relocation 31 information. 32 33 The support is split into a basic support file @file{aoutx.h} 34 and other files which derive functions from the base. One 35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and 36 adds to the basic a.out functions support for sun3, sun4, 386 37 and 29k a.out files, to create a target jump vector for a 38 specific target. 39 40 This information is further split out into more specific files 41 for each machine, including @file{sunos.c} for sun3 and sun4, 42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a 43 demonstration of a 64 bit a.out format. 44 45 The base file @file{aoutx.h} defines general mechanisms for 46 reading and writing records to and from disk and various 47 other methods which BFD requires. It is included by 48 @file{aout32.c} and @file{aout64.c} to form the names 49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. 50 51 As an example, this is what goes on to make the back end for a 52 sun4, from @file{aout32.c}: 53 54 | #define ARCH_SIZE 32 55 | #include "aoutx.h" 56 57 Which exports names: 58 59 | ... 60 | aout_32_canonicalize_reloc 61 | aout_32_find_nearest_line 62 | aout_32_get_lineno 63 | aout_32_get_reloc_upper_bound 64 | ... 65 66 from @file{sunos.c}: 67 68 | #define TARGET_NAME "a.out-sunos-big" 69 | #define VECNAME sparc_aout_sunos_be_vec 70 | #include "aoutf1.h" 71 72 requires all the names from @file{aout32.c}, and produces the jump vector 73 74 | sparc_aout_sunos_be_vec 75 76 The file @file{host-aout.c} is a special case. It is for a large set 77 of hosts that use ``more or less standard'' a.out files, and 78 for which cross-debugging is not interesting. It uses the 79 standard 32-bit a.out support routines, but determines the 80 file offsets and addresses of the text, data, and BSS 81 sections, the machine architecture and machine type, and the 82 entry point address, in a host-dependent manner. Once these 83 values have been determined, generic code is used to handle 84 the object file. 85 86 When porting it to run on a new system, you must supply: 87 88 | HOST_PAGE_SIZE 89 | HOST_SEGMENT_SIZE 90 | HOST_MACHINE_ARCH (optional) 91 | HOST_MACHINE_MACHINE (optional) 92 | HOST_TEXT_START_ADDR 93 | HOST_STACK_END_ADDR 94 95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These 96 values, plus the structures and macros defined in @file{a.out.h} on 97 your host system, will produce a BFD target that will access 98 ordinary a.out files on your host. To configure a new machine 99 to use @file{host-aout.c}, specify: 100 101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec 102 | TDEPFILES= host-aout.o trad-core.o 103 104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac} 105 to use the 106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your 107 configuration is selected. */ 108 109 /* Some assumptions: 110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa. 111 Doesn't matter what the setting of WP_TEXT is on output, but it'll 112 get set on input. 113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. 114 * Any BFD with both flags clear is OMAGIC. 115 (Just want to make these explicit, so the conditions tested in this 116 file make sense if you're more familiar with a.out than with BFD.) */ 117 118 #define KEEPIT udata.i 119 120 #include "sysdep.h" 121 #include "bfd.h" 122 #include "safe-ctype.h" 123 #include "bfdlink.h" 124 125 #include "libaout.h" 126 #include "libbfd.h" 127 #include "aout/aout64.h" 128 #include "aout/stab_gnu.h" 129 #include "aout/ar.h" 130 131 /* 132 SUBSECTION 133 Relocations 134 135 DESCRIPTION 136 The file @file{aoutx.h} provides for both the @emph{standard} 137 and @emph{extended} forms of a.out relocation records. 138 139 The standard records contain only an 140 address, a symbol index, and a type field. The extended records 141 (used on 29ks and sparcs) also have a full integer for an 142 addend. */ 143 144 #ifndef CTOR_TABLE_RELOC_HOWTO 145 #define CTOR_TABLE_RELOC_IDX 2 146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \ 147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \ 148 ? howto_table_ext : howto_table_std) \ 149 + CTOR_TABLE_RELOC_IDX) 150 #endif 151 152 #ifndef MY_swap_std_reloc_in 153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in) 154 #endif 155 156 #ifndef MY_swap_ext_reloc_in 157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in) 158 #endif 159 160 #ifndef MY_swap_std_reloc_out 161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out) 162 #endif 163 164 #ifndef MY_swap_ext_reloc_out 165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out) 166 #endif 167 168 #ifndef MY_final_link_relocate 169 #define MY_final_link_relocate _bfd_final_link_relocate 170 #endif 171 172 #ifndef MY_relocate_contents 173 #define MY_relocate_contents _bfd_relocate_contents 174 #endif 175 176 #define howto_table_ext NAME (aout, ext_howto_table) 177 #define howto_table_std NAME (aout, std_howto_table) 178 179 reloc_howto_type howto_table_ext[] = 180 { 181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 182 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE), 183 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE), 184 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE), 185 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE), 186 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE), 187 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE), 188 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE), 189 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE), 190 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE), 191 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE), 192 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE), 193 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE), 194 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE), 195 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE), 196 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE), 197 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE), 198 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE), 199 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE), 200 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE), 201 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE), 202 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE), 203 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE), 204 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE), 205 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE), 206 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 207 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 208 #define RELOC_SPARC_REV32 RELOC_WDISP19 209 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE), 210 }; 211 212 /* Convert standard reloc records to "arelent" format (incl byte swap). */ 213 214 reloc_howto_type howto_table_std[] = 215 { 216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 217 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), 218 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 219 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), 220 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE), 221 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), 222 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 223 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), 224 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE), 225 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE), 226 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE), 227 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE), 228 EMPTY_HOWTO (-1), 229 EMPTY_HOWTO (-1), 230 EMPTY_HOWTO (-1), 231 EMPTY_HOWTO (-1), 232 EMPTY_HOWTO (-1), 233 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE), 234 EMPTY_HOWTO (-1), 235 EMPTY_HOWTO (-1), 236 EMPTY_HOWTO (-1), 237 EMPTY_HOWTO (-1), 238 EMPTY_HOWTO (-1), 239 EMPTY_HOWTO (-1), 240 EMPTY_HOWTO (-1), 241 EMPTY_HOWTO (-1), 242 EMPTY_HOWTO (-1), 243 EMPTY_HOWTO (-1), 244 EMPTY_HOWTO (-1), 245 EMPTY_HOWTO (-1), 246 EMPTY_HOWTO (-1), 247 EMPTY_HOWTO (-1), 248 EMPTY_HOWTO (-1), 249 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE), 250 EMPTY_HOWTO (-1), 251 EMPTY_HOWTO (-1), 252 EMPTY_HOWTO (-1), 253 EMPTY_HOWTO (-1), 254 EMPTY_HOWTO (-1), 255 EMPTY_HOWTO (-1), 256 EMPTY_HOWTO (-1), 257 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE), 258 }; 259 260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0])) 261 262 reloc_howto_type * 263 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) 264 { 265 #define EXT(i, j) case i: return & howto_table_ext [j] 266 #define STD(i, j) case i: return & howto_table_std [j] 267 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 268 269 if (code == BFD_RELOC_CTOR) 270 switch (bfd_arch_bits_per_address (abfd)) 271 { 272 case 32: 273 code = BFD_RELOC_32; 274 break; 275 case 64: 276 code = BFD_RELOC_64; 277 break; 278 } 279 280 if (ext) 281 switch (code) 282 { 283 EXT (BFD_RELOC_8, 0); 284 EXT (BFD_RELOC_16, 1); 285 EXT (BFD_RELOC_32, 2); 286 EXT (BFD_RELOC_HI22, 8); 287 EXT (BFD_RELOC_LO10, 11); 288 EXT (BFD_RELOC_32_PCREL_S2, 6); 289 EXT (BFD_RELOC_SPARC_WDISP22, 7); 290 EXT (BFD_RELOC_SPARC13, 10); 291 EXT (BFD_RELOC_SPARC_GOT10, 14); 292 EXT (BFD_RELOC_SPARC_BASE13, 15); 293 EXT (BFD_RELOC_SPARC_GOT13, 15); 294 EXT (BFD_RELOC_SPARC_GOT22, 16); 295 EXT (BFD_RELOC_SPARC_PC10, 17); 296 EXT (BFD_RELOC_SPARC_PC22, 18); 297 EXT (BFD_RELOC_SPARC_WPLT30, 19); 298 EXT (BFD_RELOC_SPARC_REV32, 26); 299 default: 300 return NULL; 301 } 302 else 303 /* std relocs. */ 304 switch (code) 305 { 306 STD (BFD_RELOC_8, 0); 307 STD (BFD_RELOC_16, 1); 308 STD (BFD_RELOC_32, 2); 309 STD (BFD_RELOC_8_PCREL, 4); 310 STD (BFD_RELOC_16_PCREL, 5); 311 STD (BFD_RELOC_32_PCREL, 6); 312 STD (BFD_RELOC_16_BASEREL, 9); 313 STD (BFD_RELOC_32_BASEREL, 10); 314 default: 315 return NULL; 316 } 317 } 318 319 reloc_howto_type * 320 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name) 321 { 322 unsigned int i, size; 323 reloc_howto_type *howto_table; 324 325 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE) 326 { 327 howto_table = howto_table_ext; 328 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]); 329 } 330 else 331 { 332 howto_table = howto_table_std; 333 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]); 334 } 335 336 for (i = 0; i < size; i++) 337 if (howto_table[i].name != NULL 338 && strcasecmp (howto_table[i].name, r_name) == 0) 339 return &howto_table[i]; 340 341 return NULL; 342 } 343 344 /* 345 SUBSECTION 346 Internal entry points 347 348 DESCRIPTION 349 @file{aoutx.h} exports several routines for accessing the 350 contents of an a.out file, which are gathered and exported in 351 turn by various format specific files (eg sunos.c). 352 */ 353 354 /* 355 FUNCTION 356 aout_@var{size}_swap_exec_header_in 357 358 SYNOPSIS 359 void aout_@var{size}_swap_exec_header_in, 360 (bfd *abfd, 361 struct external_exec *bytes, 362 struct internal_exec *execp); 363 364 DESCRIPTION 365 Swap the information in an executable header @var{raw_bytes} taken 366 from a raw byte stream memory image into the internal exec header 367 structure @var{execp}. 368 */ 369 370 #ifndef NAME_swap_exec_header_in 371 void 372 NAME (aout, swap_exec_header_in) (bfd *abfd, 373 struct external_exec *bytes, 374 struct internal_exec *execp) 375 { 376 /* The internal_exec structure has some fields that are unused in this 377 configuration (IE for i960), so ensure that all such uninitialized 378 fields are zero'd out. There are places where two of these structs 379 are memcmp'd, and thus the contents do matter. */ 380 memset ((void *) execp, 0, sizeof (struct internal_exec)); 381 /* Now fill in fields in the execp, from the bytes in the raw data. */ 382 execp->a_info = H_GET_32 (abfd, bytes->e_info); 383 execp->a_text = GET_WORD (abfd, bytes->e_text); 384 execp->a_data = GET_WORD (abfd, bytes->e_data); 385 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 386 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 387 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 388 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 389 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 390 } 391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) 392 #endif 393 394 /* 395 FUNCTION 396 aout_@var{size}_swap_exec_header_out 397 398 SYNOPSIS 399 void aout_@var{size}_swap_exec_header_out 400 (bfd *abfd, 401 struct internal_exec *execp, 402 struct external_exec *raw_bytes); 403 404 DESCRIPTION 405 Swap the information in an internal exec header structure 406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 407 */ 408 void 409 NAME (aout, swap_exec_header_out) (bfd *abfd, 410 struct internal_exec *execp, 411 struct external_exec *bytes) 412 { 413 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 414 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 415 PUT_WORD (abfd, execp->a_text , bytes->e_text); 416 PUT_WORD (abfd, execp->a_data , bytes->e_data); 417 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 418 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 419 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 420 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 421 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 422 } 423 424 /* Make all the section for an a.out file. */ 425 426 bfd_boolean 427 NAME (aout, make_sections) (bfd *abfd) 428 { 429 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) 430 return FALSE; 431 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) 432 return FALSE; 433 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) 434 return FALSE; 435 return TRUE; 436 } 437 438 /* 439 FUNCTION 440 aout_@var{size}_some_aout_object_p 441 442 SYNOPSIS 443 const bfd_target *aout_@var{size}_some_aout_object_p 444 (bfd *abfd, 445 struct internal_exec *execp, 446 const bfd_target *(*callback_to_real_object_p) (bfd *)); 447 448 DESCRIPTION 449 Some a.out variant thinks that the file open in @var{abfd} 450 checking is an a.out file. Do some more checking, and set up 451 for access if it really is. Call back to the calling 452 environment's "finish up" function just before returning, to 453 handle any last-minute setup. 454 */ 455 456 const bfd_target * 457 NAME (aout, some_aout_object_p) (bfd *abfd, 458 struct internal_exec *execp, 459 const bfd_target *(*callback_to_real_object_p) (bfd *)) 460 { 461 struct aout_data_struct *rawptr, *oldrawptr; 462 const bfd_target *result; 463 bfd_size_type amt = sizeof (* rawptr); 464 465 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 466 if (rawptr == NULL) 467 return NULL; 468 469 oldrawptr = abfd->tdata.aout_data; 470 abfd->tdata.aout_data = rawptr; 471 472 /* Copy the contents of the old tdata struct. 473 In particular, we want the subformat, since for hpux it was set in 474 hp300hpux.c:swap_exec_header_in and will be used in 475 hp300hpux.c:callback. */ 476 if (oldrawptr != NULL) 477 *abfd->tdata.aout_data = *oldrawptr; 478 479 abfd->tdata.aout_data->a.hdr = &rawptr->e; 480 /* Copy in the internal_exec struct. */ 481 *(abfd->tdata.aout_data->a.hdr) = *execp; 482 execp = abfd->tdata.aout_data->a.hdr; 483 484 /* Set the file flags. */ 485 abfd->flags = BFD_NO_FLAGS; 486 if (execp->a_drsize || execp->a_trsize) 487 abfd->flags |= HAS_RELOC; 488 /* Setting of EXEC_P has been deferred to the bottom of this function. */ 489 if (execp->a_syms) 490 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 491 if (N_DYNAMIC (*execp)) 492 abfd->flags |= DYNAMIC; 493 494 if (N_MAGIC (*execp) == ZMAGIC) 495 { 496 abfd->flags |= D_PAGED | WP_TEXT; 497 adata (abfd).magic = z_magic; 498 } 499 else if (N_MAGIC (*execp) == QMAGIC) 500 { 501 abfd->flags |= D_PAGED | WP_TEXT; 502 adata (abfd).magic = z_magic; 503 adata (abfd).subformat = q_magic_format; 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 || N_MAGIC (*execp) == BMAGIC) 512 adata (abfd).magic = o_magic; 513 else 514 /* Should have been checked with N_BADMAG before this routine 515 was called. */ 516 abort (); 517 518 bfd_get_start_address (abfd) = execp->a_entry; 519 520 obj_aout_symbols (abfd) = NULL; 521 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 522 523 /* The default relocation entry size is that of traditional V7 Unix. */ 524 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 525 526 /* The default symbol entry size is that of traditional Unix. */ 527 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 528 529 #ifdef USE_MMAP 530 bfd_init_window (&obj_aout_sym_window (abfd)); 531 bfd_init_window (&obj_aout_string_window (abfd)); 532 #endif 533 obj_aout_external_syms (abfd) = NULL; 534 obj_aout_external_strings (abfd) = NULL; 535 obj_aout_sym_hashes (abfd) = NULL; 536 537 if (! NAME (aout, make_sections) (abfd)) 538 goto error_ret; 539 540 obj_datasec (abfd)->size = execp->a_data; 541 obj_bsssec (abfd)->size = execp->a_bss; 542 543 obj_textsec (abfd)->flags = 544 (execp->a_trsize != 0 545 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 546 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 547 obj_datasec (abfd)->flags = 548 (execp->a_drsize != 0 549 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 550 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 551 obj_bsssec (abfd)->flags = SEC_ALLOC; 552 553 #ifdef THIS_IS_ONLY_DOCUMENTATION 554 /* The common code can't fill in these things because they depend 555 on either the start address of the text segment, the rounding 556 up of virtual addresses between segments, or the starting file 557 position of the text segment -- all of which varies among different 558 versions of a.out. */ 559 560 /* Call back to the format-dependent code to fill in the rest of the 561 fields and do any further cleanup. Things that should be filled 562 in by the callback: */ 563 564 struct exec *execp = exec_hdr (abfd); 565 566 obj_textsec (abfd)->size = N_TXTSIZE (*execp); 567 /* Data and bss are already filled in since they're so standard. */ 568 569 /* The virtual memory addresses of the sections. */ 570 obj_textsec (abfd)->vma = N_TXTADDR (*execp); 571 obj_datasec (abfd)->vma = N_DATADDR (*execp); 572 obj_bsssec (abfd)->vma = N_BSSADDR (*execp); 573 574 /* The file offsets of the sections. */ 575 obj_textsec (abfd)->filepos = N_TXTOFF (*execp); 576 obj_datasec (abfd)->filepos = N_DATOFF (*execp); 577 578 /* The file offsets of the relocation info. */ 579 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp); 580 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp); 581 582 /* The file offsets of the string table and symbol table. */ 583 obj_str_filepos (abfd) = N_STROFF (*execp); 584 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 585 586 /* Determine the architecture and machine type of the object file. */ 587 switch (N_MACHTYPE (*exec_hdr (abfd))) 588 { 589 default: 590 abfd->obj_arch = bfd_arch_obscure; 591 break; 592 } 593 594 adata (abfd)->page_size = TARGET_PAGE_SIZE; 595 adata (abfd)->segment_size = SEGMENT_SIZE; 596 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 597 598 return abfd->xvec; 599 600 /* The architecture is encoded in various ways in various a.out variants, 601 or is not encoded at all in some of them. The relocation size depends 602 on the architecture and the a.out variant. Finally, the return value 603 is the bfd_target vector in use. If an error occurs, return zero and 604 set bfd_error to the appropriate error code. 605 606 Formats such as b.out, which have additional fields in the a.out 607 header, should cope with them in this callback as well. */ 608 #endif /* DOCUMENTATION */ 609 610 result = (*callback_to_real_object_p) (abfd); 611 612 /* Now that the segment addresses have been worked out, take a better 613 guess at whether the file is executable. If the entry point 614 is within the text segment, assume it is. (This makes files 615 executable even if their entry point address is 0, as long as 616 their text starts at zero.). 617 618 This test had to be changed to deal with systems where the text segment 619 runs at a different location than the default. The problem is that the 620 entry address can appear to be outside the text segment, thus causing an 621 erroneous conclusion that the file isn't executable. 622 623 To fix this, we now accept any non-zero entry point as an indication of 624 executability. This will work most of the time, since only the linker 625 sets the entry point, and that is likely to be non-zero for most systems. */ 626 627 if (execp->a_entry != 0 628 || (execp->a_entry >= obj_textsec (abfd)->vma 629 && execp->a_entry < (obj_textsec (abfd)->vma 630 + obj_textsec (abfd)->size) 631 && execp->a_trsize == 0 632 && execp->a_drsize == 0)) 633 abfd->flags |= EXEC_P; 634 #ifdef STAT_FOR_EXEC 635 else 636 { 637 struct stat stat_buf; 638 639 /* The original heuristic doesn't work in some important cases. 640 The a.out file has no information about the text start 641 address. For files (like kernels) linked to non-standard 642 addresses (ld -Ttext nnn) the entry point may not be between 643 the default text start (obj_textsec(abfd)->vma) and 644 (obj_textsec(abfd)->vma) + text size. This is not just a mach 645 issue. Many kernels are loaded at non standard addresses. */ 646 if (abfd->iostream != NULL 647 && (abfd->flags & BFD_IN_MEMORY) == 0 648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0) 649 && ((stat_buf.st_mode & 0111) != 0)) 650 abfd->flags |= EXEC_P; 651 } 652 #endif /* STAT_FOR_EXEC */ 653 654 if (result) 655 return result; 656 657 error_ret: 658 bfd_release (abfd, rawptr); 659 abfd->tdata.aout_data = oldrawptr; 660 return NULL; 661 } 662 663 /* 664 FUNCTION 665 aout_@var{size}_mkobject 666 667 SYNOPSIS 668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd); 669 670 DESCRIPTION 671 Initialize BFD @var{abfd} for use with a.out files. 672 */ 673 674 bfd_boolean 675 NAME (aout, mkobject) (bfd *abfd) 676 { 677 struct aout_data_struct *rawptr; 678 bfd_size_type amt = sizeof (* rawptr); 679 680 bfd_set_error (bfd_error_system_call); 681 682 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 683 if (rawptr == NULL) 684 return FALSE; 685 686 abfd->tdata.aout_data = rawptr; 687 exec_hdr (abfd) = &(rawptr->e); 688 689 obj_textsec (abfd) = NULL; 690 obj_datasec (abfd) = NULL; 691 obj_bsssec (abfd) = NULL; 692 693 return TRUE; 694 } 695 696 /* 697 FUNCTION 698 aout_@var{size}_machine_type 699 700 SYNOPSIS 701 enum machine_type aout_@var{size}_machine_type 702 (enum bfd_architecture arch, 703 unsigned long machine, 704 bfd_boolean *unknown); 705 706 DESCRIPTION 707 Keep track of machine architecture and machine type for 708 a.out's. Return the <<machine_type>> for a particular 709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 710 and machine can't be represented in a.out format. 711 712 If the architecture is understood, machine type 0 (default) 713 is always understood. 714 */ 715 716 enum machine_type 717 NAME (aout, machine_type) (enum bfd_architecture arch, 718 unsigned long machine, 719 bfd_boolean *unknown) 720 { 721 enum machine_type arch_flags; 722 723 arch_flags = M_UNKNOWN; 724 *unknown = TRUE; 725 726 switch (arch) 727 { 728 case bfd_arch_sparc: 729 if (machine == 0 730 || machine == bfd_mach_sparc 731 || machine == bfd_mach_sparc_sparclite 732 || machine == bfd_mach_sparc_sparclite_le 733 || machine == bfd_mach_sparc_v8plus 734 || machine == bfd_mach_sparc_v8plusa 735 || machine == bfd_mach_sparc_v8plusb 736 || machine == bfd_mach_sparc_v9 737 || machine == bfd_mach_sparc_v9a 738 || machine == bfd_mach_sparc_v9b) 739 arch_flags = M_SPARC; 740 else if (machine == bfd_mach_sparc_sparclet) 741 arch_flags = M_SPARCLET; 742 break; 743 744 case bfd_arch_m68k: 745 switch (machine) 746 { 747 case 0: arch_flags = M_68010; break; 748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break; 749 case bfd_mach_m68010: arch_flags = M_68010; break; 750 case bfd_mach_m68020: arch_flags = M_68020; break; 751 default: arch_flags = M_UNKNOWN; break; 752 } 753 break; 754 755 case bfd_arch_i386: 756 if (machine == 0 757 || machine == bfd_mach_i386_i386 758 || machine == bfd_mach_i386_i386_intel_syntax) 759 arch_flags = M_386; 760 break; 761 762 case bfd_arch_arm: 763 if (machine == 0) 764 arch_flags = M_ARM; 765 break; 766 767 case bfd_arch_mips: 768 switch (machine) 769 { 770 case 0: 771 case bfd_mach_mips3000: 772 case bfd_mach_mips3900: 773 arch_flags = M_MIPS1; 774 break; 775 case bfd_mach_mips6000: 776 arch_flags = M_MIPS2; 777 break; 778 case bfd_mach_mips4000: 779 case bfd_mach_mips4010: 780 case bfd_mach_mips4100: 781 case bfd_mach_mips4300: 782 case bfd_mach_mips4400: 783 case bfd_mach_mips4600: 784 case bfd_mach_mips4650: 785 case bfd_mach_mips8000: 786 case bfd_mach_mips9000: 787 case bfd_mach_mips10000: 788 case bfd_mach_mips12000: 789 case bfd_mach_mips14000: 790 case bfd_mach_mips16000: 791 case bfd_mach_mips16: 792 case bfd_mach_mipsisa32: 793 case bfd_mach_mipsisa32r2: 794 case bfd_mach_mipsisa32r3: 795 case bfd_mach_mipsisa32r5: 796 case bfd_mach_mipsisa32r6: 797 case bfd_mach_mips5: 798 case bfd_mach_mipsisa64: 799 case bfd_mach_mipsisa64r2: 800 case bfd_mach_mipsisa64r3: 801 case bfd_mach_mipsisa64r5: 802 case bfd_mach_mipsisa64r6: 803 case bfd_mach_mips_sb1: 804 case bfd_mach_mips_xlr: 805 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 806 arch_flags = M_MIPS2; 807 break; 808 default: 809 arch_flags = M_UNKNOWN; 810 break; 811 } 812 break; 813 814 case bfd_arch_ns32k: 815 switch (machine) 816 { 817 case 0: arch_flags = M_NS32532; break; 818 case 32032: arch_flags = M_NS32032; break; 819 case 32532: arch_flags = M_NS32532; break; 820 default: arch_flags = M_UNKNOWN; break; 821 } 822 break; 823 824 case bfd_arch_vax: 825 *unknown = FALSE; 826 break; 827 828 case bfd_arch_cris: 829 if (machine == 0 || machine == 255) 830 arch_flags = M_CRIS; 831 break; 832 833 case bfd_arch_m88k: 834 *unknown = FALSE; 835 break; 836 837 default: 838 arch_flags = M_UNKNOWN; 839 } 840 841 if (arch_flags != M_UNKNOWN) 842 *unknown = FALSE; 843 844 return arch_flags; 845 } 846 847 /* 848 FUNCTION 849 aout_@var{size}_set_arch_mach 850 851 SYNOPSIS 852 bfd_boolean aout_@var{size}_set_arch_mach, 853 (bfd *, 854 enum bfd_architecture arch, 855 unsigned long machine); 856 857 DESCRIPTION 858 Set the architecture and the machine of the BFD @var{abfd} to the 859 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 860 can support the architecture required. 861 */ 862 863 bfd_boolean 864 NAME (aout, set_arch_mach) (bfd *abfd, 865 enum bfd_architecture arch, 866 unsigned long machine) 867 { 868 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 869 return FALSE; 870 871 if (arch != bfd_arch_unknown) 872 { 873 bfd_boolean unknown; 874 875 NAME (aout, machine_type) (arch, machine, &unknown); 876 if (unknown) 877 return FALSE; 878 } 879 880 /* Determine the size of a relocation entry. */ 881 switch (arch) 882 { 883 case bfd_arch_sparc: 884 case bfd_arch_mips: 885 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 886 break; 887 default: 888 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 889 break; 890 } 891 892 return (*aout_backend_info (abfd)->set_sizes) (abfd); 893 } 894 895 static void 896 adjust_o_magic (bfd *abfd, struct internal_exec *execp) 897 { 898 file_ptr pos = adata (abfd).exec_bytes_size; 899 bfd_vma vma = 0; 900 int pad = 0; 901 902 /* Text. */ 903 obj_textsec (abfd)->filepos = pos; 904 if (!obj_textsec (abfd)->user_set_vma) 905 obj_textsec (abfd)->vma = vma; 906 else 907 vma = obj_textsec (abfd)->vma; 908 909 pos += obj_textsec (abfd)->size; 910 vma += obj_textsec (abfd)->size; 911 912 /* Data. */ 913 if (!obj_datasec (abfd)->user_set_vma) 914 { 915 obj_textsec (abfd)->size += pad; 916 pos += pad; 917 vma += pad; 918 obj_datasec (abfd)->vma = vma; 919 } 920 else 921 vma = obj_datasec (abfd)->vma; 922 obj_datasec (abfd)->filepos = pos; 923 pos += obj_datasec (abfd)->size; 924 vma += obj_datasec (abfd)->size; 925 926 /* BSS. */ 927 if (!obj_bsssec (abfd)->user_set_vma) 928 { 929 obj_datasec (abfd)->size += pad; 930 pos += pad; 931 vma += pad; 932 obj_bsssec (abfd)->vma = vma; 933 } 934 else 935 { 936 /* The VMA of the .bss section is set by the VMA of the 937 .data section plus the size of the .data section. We may 938 need to add padding bytes to make this true. */ 939 pad = obj_bsssec (abfd)->vma - vma; 940 if (pad > 0) 941 { 942 obj_datasec (abfd)->size += pad; 943 pos += pad; 944 } 945 } 946 obj_bsssec (abfd)->filepos = pos; 947 948 /* Fix up the exec header. */ 949 execp->a_text = obj_textsec (abfd)->size; 950 execp->a_data = obj_datasec (abfd)->size; 951 execp->a_bss = obj_bsssec (abfd)->size; 952 N_SET_MAGIC (*execp, OMAGIC); 953 } 954 955 static void 956 adjust_z_magic (bfd *abfd, struct internal_exec *execp) 957 { 958 bfd_size_type data_pad, text_pad; 959 file_ptr text_end; 960 const struct aout_backend_data *abdp; 961 /* TRUE if text includes exec header. */ 962 bfd_boolean ztih; 963 964 abdp = aout_backend_info (abfd); 965 966 /* Text. */ 967 ztih = (abdp != NULL 968 && (abdp->text_includes_header 969 || obj_aout_subformat (abfd) == q_magic_format)); 970 obj_textsec (abfd)->filepos = (ztih 971 ? adata (abfd).exec_bytes_size 972 : adata (abfd).zmagic_disk_block_size); 973 if (! obj_textsec (abfd)->user_set_vma) 974 { 975 /* ?? Do we really need to check for relocs here? */ 976 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 977 ? 0 978 : (ztih 979 ? (abdp->default_text_vma 980 + adata (abfd).exec_bytes_size) 981 : abdp->default_text_vma)); 982 text_pad = 0; 983 } 984 else 985 { 986 /* The .text section is being loaded at an unusual address. We 987 may need to pad it such that the .data section starts at a page 988 boundary. */ 989 if (ztih) 990 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 991 & (adata (abfd).page_size - 1)); 992 else 993 text_pad = ((- obj_textsec (abfd)->vma) 994 & (adata (abfd).page_size - 1)); 995 } 996 997 /* Find start of data. */ 998 if (ztih) 999 { 1000 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; 1001 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1002 } 1003 else 1004 { 1005 /* Note that if page_size == zmagic_disk_block_size, then 1006 filepos == page_size, and this case is the same as the ztih 1007 case. */ 1008 text_end = obj_textsec (abfd)->size; 1009 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1010 text_end += obj_textsec (abfd)->filepos; 1011 } 1012 obj_textsec (abfd)->size += text_pad; 1013 text_end += text_pad; 1014 1015 /* Data. */ 1016 if (!obj_datasec (abfd)->user_set_vma) 1017 { 1018 bfd_vma vma; 1019 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size; 1020 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1021 } 1022 if (abdp && abdp->zmagic_mapped_contiguous) 1023 { 1024 asection * text = obj_textsec (abfd); 1025 asection * data = obj_datasec (abfd); 1026 1027 text_pad = data->vma - (text->vma + text->size); 1028 /* Only pad the text section if the data 1029 section is going to be placed after it. */ 1030 if (text_pad > 0) 1031 text->size += text_pad; 1032 } 1033 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1034 + obj_textsec (abfd)->size); 1035 1036 /* Fix up exec header while we're at it. */ 1037 execp->a_text = obj_textsec (abfd)->size; 1038 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1039 execp->a_text += adata (abfd).exec_bytes_size; 1040 if (obj_aout_subformat (abfd) == q_magic_format) 1041 N_SET_MAGIC (*execp, QMAGIC); 1042 else 1043 N_SET_MAGIC (*execp, ZMAGIC); 1044 1045 /* Spec says data section should be rounded up to page boundary. */ 1046 obj_datasec (abfd)->size 1047 = align_power (obj_datasec (abfd)->size, 1048 obj_bsssec (abfd)->alignment_power); 1049 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size, 1050 adata (abfd).page_size); 1051 data_pad = execp->a_data - obj_datasec (abfd)->size; 1052 1053 /* BSS. */ 1054 if (!obj_bsssec (abfd)->user_set_vma) 1055 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1056 + obj_datasec (abfd)->size); 1057 /* If the BSS immediately follows the data section and extra space 1058 in the page is left after the data section, fudge data 1059 in the header so that the bss section looks smaller by that 1060 amount. We'll start the bss section there, and lie to the OS. 1061 (Note that a linker script, as well as the above assignment, 1062 could have explicitly set the BSS vma to immediately follow 1063 the data section.) */ 1064 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1065 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size) 1066 execp->a_bss = (data_pad > obj_bsssec (abfd)->size 1067 ? 0 : obj_bsssec (abfd)->size - data_pad); 1068 else 1069 execp->a_bss = obj_bsssec (abfd)->size; 1070 } 1071 1072 static void 1073 adjust_n_magic (bfd *abfd, struct internal_exec *execp) 1074 { 1075 file_ptr pos = adata (abfd).exec_bytes_size; 1076 bfd_vma vma = 0; 1077 int pad; 1078 1079 /* Text. */ 1080 obj_textsec (abfd)->filepos = pos; 1081 if (!obj_textsec (abfd)->user_set_vma) 1082 obj_textsec (abfd)->vma = vma; 1083 else 1084 vma = obj_textsec (abfd)->vma; 1085 pos += obj_textsec (abfd)->size; 1086 vma += obj_textsec (abfd)->size; 1087 1088 /* Data. */ 1089 obj_datasec (abfd)->filepos = pos; 1090 if (!obj_datasec (abfd)->user_set_vma) 1091 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1092 vma = obj_datasec (abfd)->vma; 1093 1094 /* Since BSS follows data immediately, see if it needs alignment. */ 1095 vma += obj_datasec (abfd)->size; 1096 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1097 obj_datasec (abfd)->size += pad; 1098 pos += obj_datasec (abfd)->size; 1099 1100 /* BSS. */ 1101 if (!obj_bsssec (abfd)->user_set_vma) 1102 obj_bsssec (abfd)->vma = vma; 1103 else 1104 vma = obj_bsssec (abfd)->vma; 1105 1106 /* Fix up exec header. */ 1107 execp->a_text = obj_textsec (abfd)->size; 1108 execp->a_data = obj_datasec (abfd)->size; 1109 execp->a_bss = obj_bsssec (abfd)->size; 1110 N_SET_MAGIC (*execp, NMAGIC); 1111 } 1112 1113 bfd_boolean 1114 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd, 1115 bfd_size_type *text_size, 1116 file_ptr *text_end ATTRIBUTE_UNUSED) 1117 { 1118 struct internal_exec *execp = exec_hdr (abfd); 1119 1120 if (! NAME (aout, make_sections) (abfd)) 1121 return FALSE; 1122 1123 if (adata (abfd).magic != undecided_magic) 1124 return TRUE; 1125 1126 obj_textsec (abfd)->size = 1127 align_power (obj_textsec (abfd)->size, 1128 obj_textsec (abfd)->alignment_power); 1129 1130 *text_size = obj_textsec (abfd)->size; 1131 /* Rule (heuristic) for when to pad to a new page. Note that there 1132 are (at least) two ways demand-paged (ZMAGIC) files have been 1133 handled. Most Berkeley-based systems start the text segment at 1134 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1135 segment right after the exec header; the latter is counted in the 1136 text segment size, and is paged in by the kernel with the rest of 1137 the text. */ 1138 1139 /* This perhaps isn't the right way to do this, but made it simpler for me 1140 to understand enough to implement it. Better would probably be to go 1141 right from BFD flags to alignment/positioning characteristics. But the 1142 old code was sloppy enough about handling the flags, and had enough 1143 other magic, that it was a little hard for me to understand. I think 1144 I understand it better now, but I haven't time to do the cleanup this 1145 minute. */ 1146 1147 if (abfd->flags & D_PAGED) 1148 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1149 adata (abfd).magic = z_magic; 1150 else if (abfd->flags & WP_TEXT) 1151 adata (abfd).magic = n_magic; 1152 else 1153 adata (abfd).magic = o_magic; 1154 1155 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1156 #if __GNUC__ >= 2 1157 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1158 ({ char *str; 1159 switch (adata (abfd).magic) 1160 { 1161 case n_magic: str = "NMAGIC"; break; 1162 case o_magic: str = "OMAGIC"; break; 1163 case z_magic: str = "ZMAGIC"; break; 1164 default: abort (); 1165 } 1166 str; 1167 }), 1168 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1169 obj_textsec (abfd)->alignment_power, 1170 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1171 obj_datasec (abfd)->alignment_power, 1172 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size, 1173 obj_bsssec (abfd)->alignment_power); 1174 #endif 1175 #endif 1176 1177 switch (adata (abfd).magic) 1178 { 1179 case o_magic: 1180 adjust_o_magic (abfd, execp); 1181 break; 1182 case z_magic: 1183 adjust_z_magic (abfd, execp); 1184 break; 1185 case n_magic: 1186 adjust_n_magic (abfd, execp); 1187 break; 1188 default: 1189 abort (); 1190 } 1191 1192 #ifdef BFD_AOUT_DEBUG 1193 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1194 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1195 obj_textsec (abfd)->filepos, 1196 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1197 obj_datasec (abfd)->filepos, 1198 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size); 1199 #endif 1200 1201 return TRUE; 1202 } 1203 1204 /* 1205 FUNCTION 1206 aout_@var{size}_new_section_hook 1207 1208 SYNOPSIS 1209 bfd_boolean aout_@var{size}_new_section_hook, 1210 (bfd *abfd, 1211 asection *newsect); 1212 1213 DESCRIPTION 1214 Called by the BFD in response to a @code{bfd_make_section} 1215 request. 1216 */ 1217 bfd_boolean 1218 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) 1219 { 1220 /* Align to double at least. */ 1221 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power; 1222 1223 if (bfd_get_format (abfd) == bfd_object) 1224 { 1225 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text")) 1226 { 1227 obj_textsec (abfd)= newsect; 1228 newsect->target_index = N_TEXT; 1229 } 1230 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data")) 1231 { 1232 obj_datasec (abfd) = newsect; 1233 newsect->target_index = N_DATA; 1234 } 1235 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss")) 1236 { 1237 obj_bsssec (abfd) = newsect; 1238 newsect->target_index = N_BSS; 1239 } 1240 } 1241 1242 /* We allow more than three sections internally. */ 1243 return _bfd_generic_new_section_hook (abfd, newsect); 1244 } 1245 1246 bfd_boolean 1247 NAME (aout, set_section_contents) (bfd *abfd, 1248 sec_ptr section, 1249 const void * location, 1250 file_ptr offset, 1251 bfd_size_type count) 1252 { 1253 file_ptr text_end; 1254 bfd_size_type text_size; 1255 1256 if (! abfd->output_has_begun) 1257 { 1258 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 1259 return FALSE; 1260 } 1261 1262 if (section == obj_bsssec (abfd)) 1263 { 1264 bfd_set_error (bfd_error_no_contents); 1265 return FALSE; 1266 } 1267 1268 if (section != obj_textsec (abfd) 1269 && section != obj_datasec (abfd)) 1270 { 1271 if (aout_section_merge_with_text_p (abfd, section)) 1272 section->filepos = obj_textsec (abfd)->filepos + 1273 (section->vma - obj_textsec (abfd)->vma); 1274 else 1275 { 1276 (*_bfd_error_handler) 1277 (_("%s: can not represent section `%s' in a.out object file format"), 1278 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1279 bfd_set_error (bfd_error_nonrepresentable_section); 1280 return FALSE; 1281 } 1282 } 1283 1284 if (count != 0) 1285 { 1286 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1287 || bfd_bwrite (location, count, abfd) != count) 1288 return FALSE; 1289 } 1290 1291 return TRUE; 1292 } 1293 1294 /* Read the external symbols from an a.out file. */ 1296 1297 static bfd_boolean 1298 aout_get_external_symbols (bfd *abfd) 1299 { 1300 if (obj_aout_external_syms (abfd) == NULL) 1301 { 1302 bfd_size_type count; 1303 struct external_nlist *syms; 1304 bfd_size_type amt = exec_hdr (abfd)->a_syms; 1305 1306 count = amt / EXTERNAL_NLIST_SIZE; 1307 if (count == 0) 1308 return TRUE; /* Nothing to do. */ 1309 1310 #ifdef USE_MMAP 1311 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), amt, 1312 &obj_aout_sym_window (abfd), TRUE)) 1313 return FALSE; 1314 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1315 #else 1316 /* We allocate using malloc to make the values easy to free 1317 later on. If we put them on the objalloc it might not be 1318 possible to free them. */ 1319 syms = (struct external_nlist *) bfd_malloc (amt); 1320 if (syms == NULL) 1321 return FALSE; 1322 1323 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1324 || bfd_bread (syms, amt, abfd) != amt) 1325 { 1326 free (syms); 1327 return FALSE; 1328 } 1329 #endif 1330 1331 obj_aout_external_syms (abfd) = syms; 1332 obj_aout_external_sym_count (abfd) = count; 1333 } 1334 1335 if (obj_aout_external_strings (abfd) == NULL 1336 && exec_hdr (abfd)->a_syms != 0) 1337 { 1338 unsigned char string_chars[BYTES_IN_WORD]; 1339 bfd_size_type stringsize; 1340 char *strings; 1341 bfd_size_type amt = BYTES_IN_WORD; 1342 1343 /* Get the size of the strings. */ 1344 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1345 || bfd_bread ((void *) string_chars, amt, abfd) != amt) 1346 return FALSE; 1347 stringsize = GET_WORD (abfd, string_chars); 1348 1349 #ifdef USE_MMAP 1350 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1351 &obj_aout_string_window (abfd), TRUE)) 1352 return FALSE; 1353 strings = (char *) obj_aout_string_window (abfd).data; 1354 #else 1355 strings = (char *) bfd_malloc (stringsize + 1); 1356 if (strings == NULL) 1357 return FALSE; 1358 1359 /* Skip space for the string count in the buffer for convenience 1360 when using indexes. */ 1361 amt = stringsize - BYTES_IN_WORD; 1362 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1363 { 1364 free (strings); 1365 return FALSE; 1366 } 1367 #endif 1368 1369 /* Ensure that a zero index yields an empty string. */ 1370 strings[0] = '\0'; 1371 1372 strings[stringsize - 1] = 0; 1373 1374 obj_aout_external_strings (abfd) = strings; 1375 obj_aout_external_string_size (abfd) = stringsize; 1376 } 1377 1378 return TRUE; 1379 } 1380 1381 /* Translate an a.out symbol into a BFD symbol. The desc, other, type 1382 and symbol->value fields of CACHE_PTR will be set from the a.out 1383 nlist structure. This function is responsible for setting 1384 symbol->flags and symbol->section, and adjusting symbol->value. */ 1385 1386 static bfd_boolean 1387 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr) 1388 { 1389 flagword visible; 1390 1391 if ((cache_ptr->type & N_STAB) != 0 1392 || cache_ptr->type == N_FN) 1393 { 1394 asection *sec; 1395 1396 /* This is a debugging symbol. */ 1397 cache_ptr->symbol.flags = BSF_DEBUGGING; 1398 1399 /* Work out the symbol section. */ 1400 switch (cache_ptr->type & N_TYPE) 1401 { 1402 case N_TEXT: 1403 case N_FN: 1404 sec = obj_textsec (abfd); 1405 break; 1406 case N_DATA: 1407 sec = obj_datasec (abfd); 1408 break; 1409 case N_BSS: 1410 sec = obj_bsssec (abfd); 1411 break; 1412 default: 1413 case N_ABS: 1414 sec = bfd_abs_section_ptr; 1415 break; 1416 } 1417 1418 cache_ptr->symbol.section = sec; 1419 cache_ptr->symbol.value -= sec->vma; 1420 1421 return TRUE; 1422 } 1423 1424 /* Get the default visibility. This does not apply to all types, so 1425 we just hold it in a local variable to use if wanted. */ 1426 if ((cache_ptr->type & N_EXT) == 0) 1427 visible = BSF_LOCAL; 1428 else 1429 visible = BSF_GLOBAL; 1430 1431 switch (cache_ptr->type) 1432 { 1433 default: 1434 case N_ABS: case N_ABS | N_EXT: 1435 cache_ptr->symbol.section = bfd_abs_section_ptr; 1436 cache_ptr->symbol.flags = visible; 1437 break; 1438 1439 case N_UNDF | N_EXT: 1440 if (cache_ptr->symbol.value != 0) 1441 { 1442 /* This is a common symbol. */ 1443 cache_ptr->symbol.flags = BSF_GLOBAL; 1444 cache_ptr->symbol.section = bfd_com_section_ptr; 1445 } 1446 else 1447 { 1448 cache_ptr->symbol.flags = 0; 1449 cache_ptr->symbol.section = bfd_und_section_ptr; 1450 } 1451 break; 1452 1453 case N_TEXT: case N_TEXT | N_EXT: 1454 cache_ptr->symbol.section = obj_textsec (abfd); 1455 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1456 cache_ptr->symbol.flags = visible; 1457 break; 1458 1459 /* N_SETV symbols used to represent set vectors placed in the 1460 data section. They are no longer generated. Theoretically, 1461 it was possible to extract the entries and combine them with 1462 new ones, although I don't know if that was ever actually 1463 done. Unless that feature is restored, treat them as data 1464 symbols. */ 1465 case N_SETV: case N_SETV | N_EXT: 1466 case N_DATA: case N_DATA | N_EXT: 1467 cache_ptr->symbol.section = obj_datasec (abfd); 1468 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1469 cache_ptr->symbol.flags = visible; 1470 break; 1471 1472 case N_BSS: case N_BSS | N_EXT: 1473 cache_ptr->symbol.section = obj_bsssec (abfd); 1474 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1475 cache_ptr->symbol.flags = visible; 1476 break; 1477 1478 case N_SETA: case N_SETA | N_EXT: 1479 case N_SETT: case N_SETT | N_EXT: 1480 case N_SETD: case N_SETD | N_EXT: 1481 case N_SETB: case N_SETB | N_EXT: 1482 { 1483 /* This code is no longer needed. It used to be used to make 1484 the linker handle set symbols, but they are now handled in 1485 the add_symbols routine instead. */ 1486 switch (cache_ptr->type & N_TYPE) 1487 { 1488 case N_SETA: 1489 cache_ptr->symbol.section = bfd_abs_section_ptr; 1490 break; 1491 case N_SETT: 1492 cache_ptr->symbol.section = obj_textsec (abfd); 1493 break; 1494 case N_SETD: 1495 cache_ptr->symbol.section = obj_datasec (abfd); 1496 break; 1497 case N_SETB: 1498 cache_ptr->symbol.section = obj_bsssec (abfd); 1499 break; 1500 } 1501 1502 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1503 } 1504 break; 1505 1506 case N_WARNING: 1507 /* This symbol is the text of a warning message. The next 1508 symbol is the symbol to associate the warning with. If a 1509 reference is made to that symbol, a warning is issued. */ 1510 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1511 cache_ptr->symbol.section = bfd_abs_section_ptr; 1512 break; 1513 1514 case N_INDR: case N_INDR | N_EXT: 1515 /* An indirect symbol. This consists of two symbols in a row. 1516 The first symbol is the name of the indirection. The second 1517 symbol is the name of the target. A reference to the first 1518 symbol becomes a reference to the second. */ 1519 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1520 cache_ptr->symbol.section = bfd_ind_section_ptr; 1521 break; 1522 1523 case N_WEAKU: 1524 cache_ptr->symbol.section = bfd_und_section_ptr; 1525 cache_ptr->symbol.flags = BSF_WEAK; 1526 break; 1527 1528 case N_WEAKA: 1529 cache_ptr->symbol.section = bfd_abs_section_ptr; 1530 cache_ptr->symbol.flags = BSF_WEAK; 1531 break; 1532 1533 case N_WEAKT: 1534 cache_ptr->symbol.section = obj_textsec (abfd); 1535 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1536 cache_ptr->symbol.flags = BSF_WEAK; 1537 break; 1538 1539 case N_WEAKD: 1540 cache_ptr->symbol.section = obj_datasec (abfd); 1541 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1542 cache_ptr->symbol.flags = BSF_WEAK; 1543 break; 1544 1545 case N_WEAKB: 1546 cache_ptr->symbol.section = obj_bsssec (abfd); 1547 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1548 cache_ptr->symbol.flags = BSF_WEAK; 1549 break; 1550 } 1551 1552 return TRUE; 1553 } 1554 1555 /* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1556 1557 static bfd_boolean 1558 translate_to_native_sym_flags (bfd *abfd, 1559 asymbol *cache_ptr, 1560 struct external_nlist *sym_pointer) 1561 { 1562 bfd_vma value = cache_ptr->value; 1563 asection *sec; 1564 bfd_vma off; 1565 1566 /* Mask out any existing type bits in case copying from one section 1567 to another. */ 1568 sym_pointer->e_type[0] &= ~N_TYPE; 1569 1570 sec = bfd_get_section (cache_ptr); 1571 off = 0; 1572 1573 if (sec == NULL) 1574 { 1575 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1576 file. */ 1577 (*_bfd_error_handler) 1578 (_("%s: can not represent section for symbol `%s' in a.out object file format"), 1579 bfd_get_filename (abfd), 1580 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1581 bfd_set_error (bfd_error_nonrepresentable_section); 1582 return FALSE; 1583 } 1584 1585 if (sec->output_section != NULL) 1586 { 1587 off = sec->output_offset; 1588 sec = sec->output_section; 1589 } 1590 1591 if (bfd_is_abs_section (sec)) 1592 sym_pointer->e_type[0] |= N_ABS; 1593 else if (sec == obj_textsec (abfd)) 1594 sym_pointer->e_type[0] |= N_TEXT; 1595 else if (sec == obj_datasec (abfd)) 1596 sym_pointer->e_type[0] |= N_DATA; 1597 else if (sec == obj_bsssec (abfd)) 1598 sym_pointer->e_type[0] |= N_BSS; 1599 else if (bfd_is_und_section (sec)) 1600 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1601 else if (bfd_is_ind_section (sec)) 1602 sym_pointer->e_type[0] = N_INDR; 1603 else if (bfd_is_com_section (sec)) 1604 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1605 else 1606 { 1607 if (aout_section_merge_with_text_p (abfd, sec)) 1608 sym_pointer->e_type[0] |= N_TEXT; 1609 else 1610 { 1611 (*_bfd_error_handler) 1612 (_("%s: can not represent section `%s' in a.out object file format"), 1613 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1614 bfd_set_error (bfd_error_nonrepresentable_section); 1615 return FALSE; 1616 } 1617 } 1618 1619 /* Turn the symbol from section relative to absolute again. */ 1620 value += sec->vma + off; 1621 1622 if ((cache_ptr->flags & BSF_WARNING) != 0) 1623 sym_pointer->e_type[0] = N_WARNING; 1624 1625 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1626 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1627 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1628 sym_pointer->e_type[0] |= N_EXT; 1629 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1630 sym_pointer->e_type[0] &= ~N_EXT; 1631 1632 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1633 { 1634 int type = ((aout_symbol_type *) cache_ptr)->type; 1635 1636 switch (type) 1637 { 1638 case N_ABS: type = N_SETA; break; 1639 case N_TEXT: type = N_SETT; break; 1640 case N_DATA: type = N_SETD; break; 1641 case N_BSS: type = N_SETB; break; 1642 } 1643 sym_pointer->e_type[0] = type; 1644 } 1645 1646 if ((cache_ptr->flags & BSF_WEAK) != 0) 1647 { 1648 int type; 1649 1650 switch (sym_pointer->e_type[0] & N_TYPE) 1651 { 1652 default: 1653 case N_ABS: type = N_WEAKA; break; 1654 case N_TEXT: type = N_WEAKT; break; 1655 case N_DATA: type = N_WEAKD; break; 1656 case N_BSS: type = N_WEAKB; break; 1657 case N_UNDF: type = N_WEAKU; break; 1658 } 1659 sym_pointer->e_type[0] = type; 1660 } 1661 1662 PUT_WORD (abfd, value, sym_pointer->e_value); 1663 1664 return TRUE; 1665 } 1666 1667 /* Native-level interface to symbols. */ 1669 1670 asymbol * 1671 NAME (aout, make_empty_symbol) (bfd *abfd) 1672 { 1673 bfd_size_type amt = sizeof (aout_symbol_type); 1674 1675 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt); 1676 if (!new_symbol) 1677 return NULL; 1678 new_symbol->symbol.the_bfd = abfd; 1679 1680 return &new_symbol->symbol; 1681 } 1682 1683 /* Translate a set of internal symbols into external symbols. */ 1684 1685 bfd_boolean 1686 NAME (aout, translate_symbol_table) (bfd *abfd, 1687 aout_symbol_type *in, 1688 struct external_nlist *ext, 1689 bfd_size_type count, 1690 char *str, 1691 bfd_size_type strsize, 1692 bfd_boolean dynamic) 1693 { 1694 struct external_nlist *ext_end; 1695 1696 ext_end = ext + count; 1697 for (; ext < ext_end; ext++, in++) 1698 { 1699 bfd_vma x; 1700 1701 x = GET_WORD (abfd, ext->e_strx); 1702 in->symbol.the_bfd = abfd; 1703 1704 /* For the normal symbols, the zero index points at the number 1705 of bytes in the string table but is to be interpreted as the 1706 null string. For the dynamic symbols, the number of bytes in 1707 the string table is stored in the __DYNAMIC structure and the 1708 zero index points at an actual string. */ 1709 if (x == 0 && ! dynamic) 1710 in->symbol.name = ""; 1711 else if (x < strsize) 1712 in->symbol.name = str + x; 1713 else 1714 return FALSE; 1715 1716 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1717 in->desc = H_GET_16 (abfd, ext->e_desc); 1718 in->other = H_GET_8 (abfd, ext->e_other); 1719 in->type = H_GET_8 (abfd, ext->e_type); 1720 in->symbol.udata.p = NULL; 1721 1722 if (! translate_from_native_sym_flags (abfd, in)) 1723 return FALSE; 1724 1725 if (dynamic) 1726 in->symbol.flags |= BSF_DYNAMIC; 1727 } 1728 1729 return TRUE; 1730 } 1731 1732 /* We read the symbols into a buffer, which is discarded when this 1733 function exits. We read the strings into a buffer large enough to 1734 hold them all plus all the cached symbol entries. */ 1735 1736 bfd_boolean 1737 NAME (aout, slurp_symbol_table) (bfd *abfd) 1738 { 1739 struct external_nlist *old_external_syms; 1740 aout_symbol_type *cached; 1741 bfd_size_type cached_size; 1742 1743 /* If there's no work to be done, don't do any. */ 1744 if (obj_aout_symbols (abfd) != NULL) 1745 return TRUE; 1746 1747 old_external_syms = obj_aout_external_syms (abfd); 1748 1749 if (! aout_get_external_symbols (abfd)) 1750 return FALSE; 1751 1752 cached_size = obj_aout_external_sym_count (abfd); 1753 if (cached_size == 0) 1754 return TRUE; /* Nothing to do. */ 1755 1756 cached_size *= sizeof (aout_symbol_type); 1757 cached = (aout_symbol_type *) bfd_zmalloc (cached_size); 1758 if (cached == NULL) 1759 return FALSE; 1760 1761 /* Convert from external symbol information to internal. */ 1762 if (! (NAME (aout, translate_symbol_table) 1763 (abfd, cached, 1764 obj_aout_external_syms (abfd), 1765 obj_aout_external_sym_count (abfd), 1766 obj_aout_external_strings (abfd), 1767 obj_aout_external_string_size (abfd), 1768 FALSE))) 1769 { 1770 free (cached); 1771 return FALSE; 1772 } 1773 1774 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1775 1776 obj_aout_symbols (abfd) = cached; 1777 1778 /* It is very likely that anybody who calls this function will not 1779 want the external symbol information, so if it was allocated 1780 because of our call to aout_get_external_symbols, we free it up 1781 right away to save space. */ 1782 if (old_external_syms == NULL 1783 && obj_aout_external_syms (abfd) != NULL) 1784 { 1785 #ifdef USE_MMAP 1786 bfd_free_window (&obj_aout_sym_window (abfd)); 1787 #else 1788 free (obj_aout_external_syms (abfd)); 1789 #endif 1790 obj_aout_external_syms (abfd) = NULL; 1791 } 1792 1793 return TRUE; 1794 } 1795 1796 /* We use a hash table when writing out symbols so that we only write 1798 out a particular string once. This helps particularly when the 1799 linker writes out stabs debugging entries, because each different 1800 contributing object file tends to have many duplicate stabs 1801 strings. 1802 1803 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1804 if BFD_TRADITIONAL_FORMAT is set. */ 1805 1806 /* Get the index of a string in a strtab, adding it if it is not 1807 already present. */ 1808 1809 static inline bfd_size_type 1810 add_to_stringtab (bfd *abfd, 1811 struct bfd_strtab_hash *tab, 1812 const char *str, 1813 bfd_boolean copy) 1814 { 1815 bfd_boolean hash; 1816 bfd_size_type str_index; 1817 1818 /* An index of 0 always means the empty string. */ 1819 if (str == 0 || *str == '\0') 1820 return 0; 1821 1822 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1823 doesn't understand a hashed string table. */ 1824 hash = TRUE; 1825 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1826 hash = FALSE; 1827 1828 str_index = _bfd_stringtab_add (tab, str, hash, copy); 1829 1830 if (str_index != (bfd_size_type) -1) 1831 /* Add BYTES_IN_WORD to the return value to account for the 1832 space taken up by the string table size. */ 1833 str_index += BYTES_IN_WORD; 1834 1835 return str_index; 1836 } 1837 1838 /* Write out a strtab. ABFD is already at the right location in the 1839 file. */ 1840 1841 static bfd_boolean 1842 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) 1843 { 1844 bfd_byte buffer[BYTES_IN_WORD]; 1845 bfd_size_type amt = BYTES_IN_WORD; 1846 1847 /* The string table starts with the size. */ 1848 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1849 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt) 1850 return FALSE; 1851 1852 return _bfd_stringtab_emit (abfd, tab); 1853 } 1854 1855 bfd_boolean 1857 NAME (aout, write_syms) (bfd *abfd) 1858 { 1859 unsigned int count ; 1860 asymbol **generic = bfd_get_outsymbols (abfd); 1861 struct bfd_strtab_hash *strtab; 1862 1863 strtab = _bfd_stringtab_init (); 1864 if (strtab == NULL) 1865 return FALSE; 1866 1867 for (count = 0; count < bfd_get_symcount (abfd); count++) 1868 { 1869 asymbol *g = generic[count]; 1870 bfd_size_type indx; 1871 struct external_nlist nsp; 1872 bfd_size_type amt; 1873 1874 indx = add_to_stringtab (abfd, strtab, g->name, FALSE); 1875 if (indx == (bfd_size_type) -1) 1876 goto error_return; 1877 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1878 1879 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1880 { 1881 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1882 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1883 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1884 } 1885 else 1886 { 1887 H_PUT_16 (abfd, 0, nsp.e_desc); 1888 H_PUT_8 (abfd, 0, nsp.e_other); 1889 H_PUT_8 (abfd, 0, nsp.e_type); 1890 } 1891 1892 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1893 goto error_return; 1894 1895 amt = EXTERNAL_NLIST_SIZE; 1896 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt) 1897 goto error_return; 1898 1899 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1900 here, at the end. */ 1901 g->KEEPIT = count; 1902 } 1903 1904 if (! emit_stringtab (abfd, strtab)) 1905 goto error_return; 1906 1907 _bfd_stringtab_free (strtab); 1908 1909 return TRUE; 1910 1911 error_return: 1912 _bfd_stringtab_free (strtab); 1913 return FALSE; 1914 } 1915 1916 long 1918 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) 1919 { 1920 unsigned int counter = 0; 1921 aout_symbol_type *symbase; 1922 1923 if (!NAME (aout, slurp_symbol_table) (abfd)) 1924 return -1; 1925 1926 for (symbase = obj_aout_symbols (abfd); 1927 counter++ < bfd_get_symcount (abfd); 1928 ) 1929 *(location++) = (asymbol *) (symbase++); 1930 *location++ =0; 1931 return bfd_get_symcount (abfd); 1932 } 1933 1934 /* Standard reloc stuff. */ 1936 /* Output standard relocation information to a file in target byte order. */ 1937 1938 extern void NAME (aout, swap_std_reloc_out) 1939 (bfd *, arelent *, struct reloc_std_external *); 1940 1941 void 1942 NAME (aout, swap_std_reloc_out) (bfd *abfd, 1943 arelent *g, 1944 struct reloc_std_external *natptr) 1945 { 1946 int r_index; 1947 asymbol *sym = *(g->sym_ptr_ptr); 1948 int r_extern; 1949 unsigned int r_length; 1950 int r_pcrel; 1951 int r_baserel, r_jmptable, r_relative; 1952 asection *output_section = sym->section->output_section; 1953 1954 PUT_WORD (abfd, g->address, natptr->r_address); 1955 1956 r_length = g->howto->size ; /* Size as a power of two. */ 1957 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 1958 /* XXX This relies on relocs coming from a.out files. */ 1959 r_baserel = (g->howto->type & 8) != 0; 1960 r_jmptable = (g->howto->type & 16) != 0; 1961 r_relative = (g->howto->type & 32) != 0; 1962 1963 /* Name was clobbered by aout_write_syms to be symbol index. */ 1964 1965 /* If this relocation is relative to a symbol then set the 1966 r_index to the symbols index, and the r_extern bit. 1967 1968 Absolute symbols can come in in two ways, either as an offset 1969 from the abs section, or as a symbol which has an abs value. 1970 check for that here. */ 1971 1972 if (bfd_is_com_section (output_section) 1973 || bfd_is_abs_section (output_section) 1974 || bfd_is_und_section (output_section) 1975 /* PR gas/3041 a.out relocs against weak symbols 1976 must be treated as if they were against externs. */ 1977 || (sym->flags & BSF_WEAK)) 1978 { 1979 if (bfd_abs_section_ptr->symbol == sym) 1980 { 1981 /* Whoops, looked like an abs symbol, but is 1982 really an offset from the abs section. */ 1983 r_index = N_ABS; 1984 r_extern = 0; 1985 } 1986 else 1987 { 1988 /* Fill in symbol. */ 1989 r_extern = 1; 1990 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 1991 } 1992 } 1993 else 1994 { 1995 /* Just an ordinary section. */ 1996 r_extern = 0; 1997 r_index = output_section->target_index; 1998 } 1999 2000 /* Now the fun stuff. */ 2001 if (bfd_header_big_endian (abfd)) 2002 { 2003 natptr->r_index[0] = r_index >> 16; 2004 natptr->r_index[1] = r_index >> 8; 2005 natptr->r_index[2] = r_index; 2006 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 2007 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 2008 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 2009 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 2010 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 2011 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 2012 } 2013 else 2014 { 2015 natptr->r_index[2] = r_index >> 16; 2016 natptr->r_index[1] = r_index >> 8; 2017 natptr->r_index[0] = r_index; 2018 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2019 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2020 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2021 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2022 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2023 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2024 } 2025 } 2026 2027 /* Extended stuff. */ 2028 /* Output extended relocation information to a file in target byte order. */ 2029 2030 extern void NAME (aout, swap_ext_reloc_out) 2031 (bfd *, arelent *, struct reloc_ext_external *); 2032 2033 void 2034 NAME (aout, swap_ext_reloc_out) (bfd *abfd, 2035 arelent *g, 2036 struct reloc_ext_external *natptr) 2037 { 2038 int r_index; 2039 int r_extern; 2040 unsigned int r_type; 2041 bfd_vma r_addend; 2042 asymbol *sym = *(g->sym_ptr_ptr); 2043 asection *output_section = sym->section->output_section; 2044 2045 PUT_WORD (abfd, g->address, natptr->r_address); 2046 2047 r_type = (unsigned int) g->howto->type; 2048 2049 r_addend = g->addend; 2050 if ((sym->flags & BSF_SECTION_SYM) != 0) 2051 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2052 2053 /* If this relocation is relative to a symbol then set the 2054 r_index to the symbols index, and the r_extern bit. 2055 2056 Absolute symbols can come in in two ways, either as an offset 2057 from the abs section, or as a symbol which has an abs value. 2058 check for that here. */ 2059 if (bfd_is_abs_section (bfd_get_section (sym))) 2060 { 2061 r_extern = 0; 2062 r_index = N_ABS; 2063 } 2064 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2065 { 2066 if (bfd_is_und_section (bfd_get_section (sym)) 2067 || (sym->flags & BSF_GLOBAL) != 0) 2068 r_extern = 1; 2069 else 2070 r_extern = 0; 2071 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2072 } 2073 else 2074 { 2075 /* Just an ordinary section. */ 2076 r_extern = 0; 2077 r_index = output_section->target_index; 2078 } 2079 2080 /* Now the fun stuff. */ 2081 if (bfd_header_big_endian (abfd)) 2082 { 2083 natptr->r_index[0] = r_index >> 16; 2084 natptr->r_index[1] = r_index >> 8; 2085 natptr->r_index[2] = r_index; 2086 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2087 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2088 } 2089 else 2090 { 2091 natptr->r_index[2] = r_index >> 16; 2092 natptr->r_index[1] = r_index >> 8; 2093 natptr->r_index[0] = r_index; 2094 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2095 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2096 } 2097 2098 PUT_WORD (abfd, r_addend, natptr->r_addend); 2099 } 2100 2101 /* BFD deals internally with all things based from the section they're 2102 in. so, something in 10 bytes into a text section with a base of 2103 50 would have a symbol (.text+10) and know .text vma was 50. 2104 2105 Aout keeps all it's symbols based from zero, so the symbol would 2106 contain 60. This macro subs the base of each section from the value 2107 to give the true offset from the section. */ 2108 2109 #define MOVE_ADDRESS(ad) \ 2110 if (r_extern) \ 2111 { \ 2112 /* Undefined symbol. */ \ 2113 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2114 cache_ptr->addend = ad; \ 2115 } \ 2116 else \ 2117 { \ 2118 /* Defined, section relative. Replace symbol with pointer to \ 2119 symbol which points to section. */ \ 2120 switch (r_index) \ 2121 { \ 2122 case N_TEXT: \ 2123 case N_TEXT | N_EXT: \ 2124 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2125 cache_ptr->addend = ad - su->textsec->vma; \ 2126 break; \ 2127 case N_DATA: \ 2128 case N_DATA | N_EXT: \ 2129 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2130 cache_ptr->addend = ad - su->datasec->vma; \ 2131 break; \ 2132 case N_BSS: \ 2133 case N_BSS | N_EXT: \ 2134 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2135 cache_ptr->addend = ad - su->bsssec->vma; \ 2136 break; \ 2137 default: \ 2138 case N_ABS: \ 2139 case N_ABS | N_EXT: \ 2140 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2141 cache_ptr->addend = ad; \ 2142 break; \ 2143 } \ 2144 } 2145 2146 void 2147 NAME (aout, swap_ext_reloc_in) (bfd *abfd, 2148 struct reloc_ext_external *bytes, 2149 arelent *cache_ptr, 2150 asymbol **symbols, 2151 bfd_size_type symcount) 2152 { 2153 unsigned int r_index; 2154 int r_extern; 2155 unsigned int r_type; 2156 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2157 2158 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2159 2160 /* Now the fun stuff. */ 2161 if (bfd_header_big_endian (abfd)) 2162 { 2163 r_index = (((unsigned int) bytes->r_index[0] << 16) 2164 | ((unsigned int) bytes->r_index[1] << 8) 2165 | bytes->r_index[2]); 2166 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2167 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2168 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2169 } 2170 else 2171 { 2172 r_index = (((unsigned int) bytes->r_index[2] << 16) 2173 | ((unsigned int) bytes->r_index[1] << 8) 2174 | bytes->r_index[0]); 2175 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2176 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2177 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2178 } 2179 2180 if (r_type < TABLE_SIZE (howto_table_ext)) 2181 cache_ptr->howto = howto_table_ext + r_type; 2182 else 2183 cache_ptr->howto = NULL; 2184 2185 /* Base relative relocs are always against the symbol table, 2186 regardless of the setting of r_extern. r_extern just reflects 2187 whether the symbol the reloc is against is local or global. */ 2188 if (r_type == (unsigned int) RELOC_BASE10 2189 || r_type == (unsigned int) RELOC_BASE13 2190 || r_type == (unsigned int) RELOC_BASE22) 2191 r_extern = 1; 2192 2193 if (r_extern && r_index > symcount) 2194 { 2195 /* We could arrange to return an error, but it might be useful 2196 to see the file even if it is bad. */ 2197 r_extern = 0; 2198 r_index = N_ABS; 2199 } 2200 2201 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2202 } 2203 2204 void 2205 NAME (aout, swap_std_reloc_in) (bfd *abfd, 2206 struct reloc_std_external *bytes, 2207 arelent *cache_ptr, 2208 asymbol **symbols, 2209 bfd_size_type symcount) 2210 { 2211 unsigned int r_index; 2212 int r_extern; 2213 unsigned int r_length; 2214 int r_pcrel; 2215 int r_baserel, r_jmptable, r_relative; 2216 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2217 unsigned int howto_idx; 2218 2219 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2220 2221 /* Now the fun stuff. */ 2222 if (bfd_header_big_endian (abfd)) 2223 { 2224 r_index = (((unsigned int) bytes->r_index[0] << 16) 2225 | ((unsigned int) bytes->r_index[1] << 8) 2226 | bytes->r_index[2]); 2227 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2228 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2229 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2230 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2231 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2232 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2233 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2234 } 2235 else 2236 { 2237 r_index = (((unsigned int) bytes->r_index[2] << 16) 2238 | ((unsigned int) bytes->r_index[1] << 8) 2239 | bytes->r_index[0]); 2240 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2241 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2242 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2243 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2244 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2245 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2246 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2247 } 2248 2249 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2250 + 16 * r_jmptable + 32 * r_relative); 2251 if (howto_idx < TABLE_SIZE (howto_table_std)) 2252 { 2253 cache_ptr->howto = howto_table_std + howto_idx; 2254 if (cache_ptr->howto->type == (unsigned int) -1) 2255 cache_ptr->howto = NULL; 2256 } 2257 else 2258 cache_ptr->howto = NULL; 2259 2260 /* Base relative relocs are always against the symbol table, 2261 regardless of the setting of r_extern. r_extern just reflects 2262 whether the symbol the reloc is against is local or global. */ 2263 if (r_baserel) 2264 r_extern = 1; 2265 2266 if (r_extern && r_index > symcount) 2267 { 2268 /* We could arrange to return an error, but it might be useful 2269 to see the file even if it is bad. */ 2270 r_extern = 0; 2271 r_index = N_ABS; 2272 } 2273 2274 MOVE_ADDRESS (0); 2275 } 2276 2277 /* Read and swap the relocs for a section. */ 2278 2279 bfd_boolean 2280 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) 2281 { 2282 bfd_size_type count; 2283 bfd_size_type reloc_size; 2284 void * relocs; 2285 arelent *reloc_cache; 2286 size_t each_size; 2287 unsigned int counter = 0; 2288 arelent *cache_ptr; 2289 bfd_size_type amt; 2290 2291 if (asect->relocation) 2292 return TRUE; 2293 2294 if (asect->flags & SEC_CONSTRUCTOR) 2295 return TRUE; 2296 2297 if (asect == obj_datasec (abfd)) 2298 reloc_size = exec_hdr (abfd)->a_drsize; 2299 else if (asect == obj_textsec (abfd)) 2300 reloc_size = exec_hdr (abfd)->a_trsize; 2301 else if (asect == obj_bsssec (abfd)) 2302 reloc_size = 0; 2303 else 2304 { 2305 bfd_set_error (bfd_error_invalid_operation); 2306 return FALSE; 2307 } 2308 2309 if (reloc_size == 0) 2310 return TRUE; /* Nothing to be done. */ 2311 2312 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2313 return FALSE; 2314 2315 each_size = obj_reloc_entry_size (abfd); 2316 2317 count = reloc_size / each_size; 2318 if (count == 0) 2319 return TRUE; /* Nothing to be done. */ 2320 2321 amt = count * sizeof (arelent); 2322 reloc_cache = (arelent *) bfd_zmalloc (amt); 2323 if (reloc_cache == NULL) 2324 return FALSE; 2325 2326 relocs = bfd_malloc (reloc_size); 2327 if (relocs == NULL) 2328 { 2329 free (reloc_cache); 2330 return FALSE; 2331 } 2332 2333 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2334 { 2335 free (relocs); 2336 free (reloc_cache); 2337 return FALSE; 2338 } 2339 2340 cache_ptr = reloc_cache; 2341 if (each_size == RELOC_EXT_SIZE) 2342 { 2343 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2344 2345 for (; counter < count; counter++, rptr++, cache_ptr++) 2346 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2347 (bfd_size_type) bfd_get_symcount (abfd)); 2348 } 2349 else 2350 { 2351 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2352 2353 for (; counter < count; counter++, rptr++, cache_ptr++) 2354 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2355 (bfd_size_type) bfd_get_symcount (abfd)); 2356 } 2357 2358 free (relocs); 2359 2360 asect->relocation = reloc_cache; 2361 asect->reloc_count = cache_ptr - reloc_cache; 2362 2363 return TRUE; 2364 } 2365 2366 /* Write out a relocation section into an object file. */ 2367 2368 bfd_boolean 2369 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) 2370 { 2371 arelent **generic; 2372 unsigned char *native, *natptr; 2373 size_t each_size; 2374 2375 unsigned int count = section->reloc_count; 2376 bfd_size_type natsize; 2377 2378 if (count == 0 || section->orelocation == NULL) 2379 return TRUE; 2380 2381 each_size = obj_reloc_entry_size (abfd); 2382 natsize = (bfd_size_type) each_size * count; 2383 native = (unsigned char *) bfd_zalloc (abfd, natsize); 2384 if (!native) 2385 return FALSE; 2386 2387 generic = section->orelocation; 2388 2389 if (each_size == RELOC_EXT_SIZE) 2390 { 2391 for (natptr = native; 2392 count != 0; 2393 --count, natptr += each_size, ++generic) 2394 MY_swap_ext_reloc_out (abfd, *generic, 2395 (struct reloc_ext_external *) natptr); 2396 } 2397 else 2398 { 2399 for (natptr = native; 2400 count != 0; 2401 --count, natptr += each_size, ++generic) 2402 MY_swap_std_reloc_out (abfd, *generic, 2403 (struct reloc_std_external *) natptr); 2404 } 2405 2406 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) 2407 { 2408 bfd_release (abfd, native); 2409 return FALSE; 2410 } 2411 bfd_release (abfd, native); 2412 2413 return TRUE; 2414 } 2415 2416 /* This is stupid. This function should be a boolean predicate. */ 2417 2418 long 2419 NAME (aout, canonicalize_reloc) (bfd *abfd, 2420 sec_ptr section, 2421 arelent **relptr, 2422 asymbol **symbols) 2423 { 2424 arelent *tblptr = section->relocation; 2425 unsigned int count; 2426 2427 if (section == obj_bsssec (abfd)) 2428 { 2429 *relptr = NULL; 2430 return 0; 2431 } 2432 2433 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols))) 2434 return -1; 2435 2436 if (section->flags & SEC_CONSTRUCTOR) 2437 { 2438 arelent_chain *chain = section->constructor_chain; 2439 for (count = 0; count < section->reloc_count; count ++) 2440 { 2441 *relptr ++ = &chain->relent; 2442 chain = chain->next; 2443 } 2444 } 2445 else 2446 { 2447 tblptr = section->relocation; 2448 2449 for (count = 0; count++ < section->reloc_count; ) 2450 { 2451 *relptr++ = tblptr++; 2452 } 2453 } 2454 *relptr = 0; 2455 2456 return section->reloc_count; 2457 } 2458 2459 long 2460 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) 2461 { 2462 if (bfd_get_format (abfd) != bfd_object) 2463 { 2464 bfd_set_error (bfd_error_invalid_operation); 2465 return -1; 2466 } 2467 2468 if (asect->flags & SEC_CONSTRUCTOR) 2469 return sizeof (arelent *) * (asect->reloc_count + 1); 2470 2471 if (asect == obj_datasec (abfd)) 2472 return sizeof (arelent *) 2473 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2474 + 1); 2475 2476 if (asect == obj_textsec (abfd)) 2477 return sizeof (arelent *) 2478 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2479 + 1); 2480 2481 if (asect == obj_bsssec (abfd)) 2482 return sizeof (arelent *); 2483 2484 if (asect == obj_bsssec (abfd)) 2485 return 0; 2486 2487 bfd_set_error (bfd_error_invalid_operation); 2488 return -1; 2489 } 2490 2491 long 2493 NAME (aout, get_symtab_upper_bound) (bfd *abfd) 2494 { 2495 if (!NAME (aout, slurp_symbol_table) (abfd)) 2496 return -1; 2497 2498 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2499 } 2500 2501 alent * 2502 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2503 asymbol *ignore_symbol ATTRIBUTE_UNUSED) 2504 { 2505 return NULL; 2506 } 2507 2508 void 2509 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2510 asymbol *symbol, 2511 symbol_info *ret) 2512 { 2513 bfd_symbol_info (symbol, ret); 2514 2515 if (ret->type == '?') 2516 { 2517 int type_code = aout_symbol (symbol)->type & 0xff; 2518 const char *stab_name = bfd_get_stab_name (type_code); 2519 static char buf[10]; 2520 2521 if (stab_name == NULL) 2522 { 2523 sprintf (buf, "(%d)", type_code); 2524 stab_name = buf; 2525 } 2526 ret->type = '-'; 2527 ret->stab_type = type_code; 2528 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2529 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2530 ret->stab_name = stab_name; 2531 } 2532 } 2533 2534 void 2535 NAME (aout, print_symbol) (bfd *abfd, 2536 void * afile, 2537 asymbol *symbol, 2538 bfd_print_symbol_type how) 2539 { 2540 FILE *file = (FILE *)afile; 2541 2542 switch (how) 2543 { 2544 case bfd_print_symbol_name: 2545 if (symbol->name) 2546 fprintf (file,"%s", symbol->name); 2547 break; 2548 case bfd_print_symbol_more: 2549 fprintf (file,"%4x %2x %2x", 2550 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2551 (unsigned) (aout_symbol (symbol)->other & 0xff), 2552 (unsigned) (aout_symbol (symbol)->type)); 2553 break; 2554 case bfd_print_symbol_all: 2555 { 2556 const char *section_name = symbol->section->name; 2557 2558 bfd_print_symbol_vandf (abfd, (void *)file, symbol); 2559 2560 fprintf (file," %-5s %04x %02x %02x", 2561 section_name, 2562 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2563 (unsigned) (aout_symbol (symbol)->other & 0xff), 2564 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2565 if (symbol->name) 2566 fprintf (file," %s", symbol->name); 2567 } 2568 break; 2569 } 2570 } 2571 2572 /* If we don't have to allocate more than 1MB to hold the generic 2573 symbols, we use the generic minisymbol methord: it's faster, since 2574 it only translates the symbols once, not multiple times. */ 2575 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2576 2577 /* Read minisymbols. For minisymbols, we use the unmodified a.out 2578 symbols. The minisymbol_to_symbol function translates these into 2579 BFD asymbol structures. */ 2580 2581 long 2582 NAME (aout, read_minisymbols) (bfd *abfd, 2583 bfd_boolean dynamic, 2584 void * *minisymsp, 2585 unsigned int *sizep) 2586 { 2587 if (dynamic) 2588 /* We could handle the dynamic symbols here as well, but it's 2589 easier to hand them off. */ 2590 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2591 2592 if (! aout_get_external_symbols (abfd)) 2593 return -1; 2594 2595 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2596 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2597 2598 *minisymsp = (void *) obj_aout_external_syms (abfd); 2599 2600 /* By passing the external symbols back from this routine, we are 2601 giving up control over the memory block. Clear 2602 obj_aout_external_syms, so that we do not try to free it 2603 ourselves. */ 2604 obj_aout_external_syms (abfd) = NULL; 2605 2606 *sizep = EXTERNAL_NLIST_SIZE; 2607 return obj_aout_external_sym_count (abfd); 2608 } 2609 2610 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2611 unmodified a.out symbol. The SYM argument is a structure returned 2612 by bfd_make_empty_symbol, which we fill in here. */ 2613 2614 asymbol * 2615 NAME (aout, minisymbol_to_symbol) (bfd *abfd, 2616 bfd_boolean dynamic, 2617 const void * minisym, 2618 asymbol *sym) 2619 { 2620 if (dynamic 2621 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2622 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2623 2624 memset (sym, 0, sizeof (aout_symbol_type)); 2625 2626 /* We call translate_symbol_table to translate a single symbol. */ 2627 if (! (NAME (aout, translate_symbol_table) 2628 (abfd, 2629 (aout_symbol_type *) sym, 2630 (struct external_nlist *) minisym, 2631 (bfd_size_type) 1, 2632 obj_aout_external_strings (abfd), 2633 obj_aout_external_string_size (abfd), 2634 FALSE))) 2635 return NULL; 2636 2637 return sym; 2638 } 2639 2640 /* Provided a BFD, a section and an offset into the section, calculate 2641 and return the name of the source file and the line nearest to the 2642 wanted location. */ 2643 2644 bfd_boolean 2645 NAME (aout, find_nearest_line) (bfd *abfd, 2646 asymbol **symbols, 2647 asection *section, 2648 bfd_vma offset, 2649 const char **filename_ptr, 2650 const char **functionname_ptr, 2651 unsigned int *line_ptr, 2652 unsigned int *disriminator_ptr) 2653 { 2654 /* Run down the file looking for the filename, function and linenumber. */ 2655 asymbol **p; 2656 const char *directory_name = NULL; 2657 const char *main_file_name = NULL; 2658 const char *current_file_name = NULL; 2659 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2660 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2661 bfd_vma low_line_vma = 0; 2662 bfd_vma low_func_vma = 0; 2663 asymbol *func = 0; 2664 bfd_size_type filelen, funclen; 2665 char *buf; 2666 2667 *filename_ptr = abfd->filename; 2668 *functionname_ptr = 0; 2669 *line_ptr = 0; 2670 if (disriminator_ptr) 2671 *disriminator_ptr = 0; 2672 2673 if (symbols != NULL) 2674 { 2675 for (p = symbols; *p; p++) 2676 { 2677 aout_symbol_type *q = (aout_symbol_type *) (*p); 2678 next: 2679 switch (q->type) 2680 { 2681 case N_TEXT: 2682 /* If this looks like a file name symbol, and it comes after 2683 the line number we have found so far, but before the 2684 offset, then we have probably not found the right line 2685 number. */ 2686 if (q->symbol.value <= offset 2687 && ((q->symbol.value > low_line_vma 2688 && (line_file_name != NULL 2689 || *line_ptr != 0)) 2690 || (q->symbol.value > low_func_vma 2691 && func != NULL))) 2692 { 2693 const char *symname; 2694 2695 symname = q->symbol.name; 2696 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2697 { 2698 if (q->symbol.value > low_line_vma) 2699 { 2700 *line_ptr = 0; 2701 line_file_name = NULL; 2702 } 2703 if (q->symbol.value > low_func_vma) 2704 func = NULL; 2705 } 2706 } 2707 break; 2708 2709 case N_SO: 2710 /* If this symbol is less than the offset, but greater than 2711 the line number we have found so far, then we have not 2712 found the right line number. */ 2713 if (q->symbol.value <= offset) 2714 { 2715 if (q->symbol.value > low_line_vma) 2716 { 2717 *line_ptr = 0; 2718 line_file_name = NULL; 2719 } 2720 if (q->symbol.value > low_func_vma) 2721 func = NULL; 2722 } 2723 2724 main_file_name = current_file_name = q->symbol.name; 2725 /* Look ahead to next symbol to check if that too is an N_SO. */ 2726 p++; 2727 if (*p == NULL) 2728 goto done; 2729 q = (aout_symbol_type *) (*p); 2730 if (q->type != (int)N_SO) 2731 goto next; 2732 2733 /* Found a second N_SO First is directory; second is filename. */ 2734 directory_name = current_file_name; 2735 main_file_name = current_file_name = q->symbol.name; 2736 if (obj_textsec (abfd) != section) 2737 goto done; 2738 break; 2739 case N_SOL: 2740 current_file_name = q->symbol.name; 2741 break; 2742 2743 case N_SLINE: 2744 2745 case N_DSLINE: 2746 case N_BSLINE: 2747 /* We'll keep this if it resolves nearer than the one we have 2748 already. */ 2749 if (q->symbol.value >= low_line_vma 2750 && q->symbol.value <= offset) 2751 { 2752 *line_ptr = q->desc; 2753 low_line_vma = q->symbol.value; 2754 line_file_name = current_file_name; 2755 line_directory_name = directory_name; 2756 } 2757 break; 2758 case N_FUN: 2759 { 2760 /* We'll keep this if it is nearer than the one we have already. */ 2761 if (q->symbol.value >= low_func_vma && 2762 q->symbol.value <= offset) 2763 { 2764 low_func_vma = q->symbol.value; 2765 func = (asymbol *)q; 2766 } 2767 else if (q->symbol.value > offset) 2768 goto done; 2769 } 2770 break; 2771 } 2772 } 2773 } 2774 2775 done: 2776 if (*line_ptr != 0) 2777 { 2778 main_file_name = line_file_name; 2779 directory_name = line_directory_name; 2780 } 2781 2782 if (main_file_name == NULL 2783 || IS_ABSOLUTE_PATH (main_file_name) 2784 || directory_name == NULL) 2785 filelen = 0; 2786 else 2787 filelen = strlen (directory_name) + strlen (main_file_name); 2788 2789 if (func == NULL) 2790 funclen = 0; 2791 else 2792 funclen = strlen (bfd_asymbol_name (func)); 2793 2794 if (adata (abfd).line_buf != NULL) 2795 free (adata (abfd).line_buf); 2796 2797 if (filelen + funclen == 0) 2798 adata (abfd).line_buf = buf = NULL; 2799 else 2800 { 2801 buf = (char *) bfd_malloc (filelen + funclen + 3); 2802 adata (abfd).line_buf = buf; 2803 if (buf == NULL) 2804 return FALSE; 2805 } 2806 2807 if (main_file_name != NULL) 2808 { 2809 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2810 *filename_ptr = main_file_name; 2811 else 2812 { 2813 sprintf (buf, "%s%s", directory_name, main_file_name); 2814 *filename_ptr = buf; 2815 buf += filelen + 1; 2816 } 2817 } 2818 2819 if (func) 2820 { 2821 const char *function = func->name; 2822 char *colon; 2823 2824 /* The caller expects a symbol name. We actually have a 2825 function name, without the leading underscore. Put the 2826 underscore back in, so that the caller gets a symbol name. */ 2827 if (bfd_get_symbol_leading_char (abfd) == '\0') 2828 strcpy (buf, function); 2829 else 2830 { 2831 buf[0] = bfd_get_symbol_leading_char (abfd); 2832 strcpy (buf + 1, function); 2833 } 2834 /* Have to remove : stuff. */ 2835 colon = strchr (buf, ':'); 2836 if (colon != NULL) 2837 *colon = '\0'; 2838 *functionname_ptr = buf; 2839 } 2840 2841 return TRUE; 2842 } 2843 2844 int 2845 NAME (aout, sizeof_headers) (bfd *abfd, 2846 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2847 { 2848 return adata (abfd).exec_bytes_size; 2849 } 2850 2851 /* Free all information we have cached for this BFD. We can always 2852 read it again later if we need it. */ 2853 2854 bfd_boolean 2855 NAME (aout, bfd_free_cached_info) (bfd *abfd) 2856 { 2857 asection *o; 2858 2859 if (bfd_get_format (abfd) != bfd_object 2860 || abfd->tdata.aout_data == NULL) 2861 return TRUE; 2862 2863 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2864 BFCI_FREE (obj_aout_symbols (abfd)); 2865 #ifdef USE_MMAP 2866 obj_aout_external_syms (abfd) = 0; 2867 bfd_free_window (&obj_aout_sym_window (abfd)); 2868 bfd_free_window (&obj_aout_string_window (abfd)); 2869 obj_aout_external_strings (abfd) = 0; 2870 #else 2871 BFCI_FREE (obj_aout_external_syms (abfd)); 2872 BFCI_FREE (obj_aout_external_strings (abfd)); 2873 #endif 2874 for (o = abfd->sections; o != NULL; o = o->next) 2875 BFCI_FREE (o->relocation); 2876 #undef BFCI_FREE 2877 2878 return TRUE; 2879 } 2880 2881 /* a.out link code. */ 2883 2884 /* Routine to create an entry in an a.out link hash table. */ 2885 2886 struct bfd_hash_entry * 2887 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, 2888 struct bfd_hash_table *table, 2889 const char *string) 2890 { 2891 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2892 2893 /* Allocate the structure if it has not already been allocated by a 2894 subclass. */ 2895 if (ret == NULL) 2896 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table, 2897 sizeof (* ret)); 2898 if (ret == NULL) 2899 return NULL; 2900 2901 /* Call the allocation method of the superclass. */ 2902 ret = ((struct aout_link_hash_entry *) 2903 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2904 table, string)); 2905 if (ret) 2906 { 2907 /* Set local fields. */ 2908 ret->written = FALSE; 2909 ret->indx = -1; 2910 } 2911 2912 return (struct bfd_hash_entry *) ret; 2913 } 2914 2915 /* Initialize an a.out link hash table. */ 2916 2917 bfd_boolean 2918 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, 2919 bfd *abfd, 2920 struct bfd_hash_entry *(*newfunc) 2921 (struct bfd_hash_entry *, struct bfd_hash_table *, 2922 const char *), 2923 unsigned int entsize) 2924 { 2925 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); 2926 } 2927 2928 /* Create an a.out link hash table. */ 2929 2930 struct bfd_link_hash_table * 2931 NAME (aout, link_hash_table_create) (bfd *abfd) 2932 { 2933 struct aout_link_hash_table *ret; 2934 bfd_size_type amt = sizeof (* ret); 2935 2936 ret = (struct aout_link_hash_table *) bfd_malloc (amt); 2937 if (ret == NULL) 2938 return NULL; 2939 2940 if (!NAME (aout, link_hash_table_init) (ret, abfd, 2941 NAME (aout, link_hash_newfunc), 2942 sizeof (struct aout_link_hash_entry))) 2943 { 2944 free (ret); 2945 return NULL; 2946 } 2947 return &ret->root; 2948 } 2949 2950 /* Add all symbols from an object file to the hash table. */ 2951 2952 static bfd_boolean 2953 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) 2954 { 2955 bfd_boolean (*add_one_symbol) 2956 (struct bfd_link_info *, bfd *, const char *, flagword, asection *, 2957 bfd_vma, const char *, bfd_boolean, bfd_boolean, 2958 struct bfd_link_hash_entry **); 2959 struct external_nlist *syms; 2960 bfd_size_type sym_count; 2961 char *strings; 2962 bfd_boolean copy; 2963 struct aout_link_hash_entry **sym_hash; 2964 struct external_nlist *p; 2965 struct external_nlist *pend; 2966 bfd_size_type amt; 2967 2968 syms = obj_aout_external_syms (abfd); 2969 sym_count = obj_aout_external_sym_count (abfd); 2970 strings = obj_aout_external_strings (abfd); 2971 if (info->keep_memory) 2972 copy = FALSE; 2973 else 2974 copy = TRUE; 2975 2976 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 2977 { 2978 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 2979 (abfd, info, &syms, &sym_count, &strings))) 2980 return FALSE; 2981 } 2982 2983 if (sym_count == 0) 2984 return TRUE; /* Nothing to do. */ 2985 2986 /* We keep a list of the linker hash table entries that correspond 2987 to particular symbols. We could just look them up in the hash 2988 table, but keeping the list is more efficient. Perhaps this 2989 should be conditional on info->keep_memory. */ 2990 amt = sym_count * sizeof (struct aout_link_hash_entry *); 2991 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt); 2992 if (sym_hash == NULL) 2993 return FALSE; 2994 obj_aout_sym_hashes (abfd) = sym_hash; 2995 2996 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 2997 if (add_one_symbol == NULL) 2998 add_one_symbol = _bfd_generic_link_add_one_symbol; 2999 3000 p = syms; 3001 pend = p + sym_count; 3002 for (; p < pend; p++, sym_hash++) 3003 { 3004 int type; 3005 const char *name; 3006 bfd_vma value; 3007 asection *section; 3008 flagword flags; 3009 const char *string; 3010 3011 *sym_hash = NULL; 3012 3013 type = H_GET_8 (abfd, p->e_type); 3014 3015 /* Ignore debugging symbols. */ 3016 if ((type & N_STAB) != 0) 3017 continue; 3018 3019 name = strings + GET_WORD (abfd, p->e_strx); 3020 value = GET_WORD (abfd, p->e_value); 3021 flags = BSF_GLOBAL; 3022 string = NULL; 3023 switch (type) 3024 { 3025 default: 3026 abort (); 3027 3028 case N_UNDF: 3029 case N_ABS: 3030 case N_TEXT: 3031 case N_DATA: 3032 case N_BSS: 3033 case N_FN_SEQ: 3034 case N_COMM: 3035 case N_SETV: 3036 case N_FN: 3037 /* Ignore symbols that are not externally visible. */ 3038 continue; 3039 case N_INDR: 3040 /* Ignore local indirect symbol. */ 3041 ++p; 3042 ++sym_hash; 3043 continue; 3044 3045 case N_UNDF | N_EXT: 3046 if (value == 0) 3047 { 3048 section = bfd_und_section_ptr; 3049 flags = 0; 3050 } 3051 else 3052 section = bfd_com_section_ptr; 3053 break; 3054 case N_ABS | N_EXT: 3055 section = bfd_abs_section_ptr; 3056 break; 3057 case N_TEXT | N_EXT: 3058 section = obj_textsec (abfd); 3059 value -= bfd_get_section_vma (abfd, section); 3060 break; 3061 case N_DATA | N_EXT: 3062 case N_SETV | N_EXT: 3063 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3064 translate_from_native_sym_flags. */ 3065 section = obj_datasec (abfd); 3066 value -= bfd_get_section_vma (abfd, section); 3067 break; 3068 case N_BSS | N_EXT: 3069 section = obj_bsssec (abfd); 3070 value -= bfd_get_section_vma (abfd, section); 3071 break; 3072 case N_INDR | N_EXT: 3073 /* An indirect symbol. The next symbol is the symbol 3074 which this one really is. */ 3075 BFD_ASSERT (p + 1 < pend); 3076 ++p; 3077 string = strings + GET_WORD (abfd, p->e_strx); 3078 section = bfd_ind_section_ptr; 3079 flags |= BSF_INDIRECT; 3080 break; 3081 case N_COMM | N_EXT: 3082 section = bfd_com_section_ptr; 3083 break; 3084 case N_SETA: case N_SETA | N_EXT: 3085 section = bfd_abs_section_ptr; 3086 flags |= BSF_CONSTRUCTOR; 3087 break; 3088 case N_SETT: case N_SETT | N_EXT: 3089 section = obj_textsec (abfd); 3090 flags |= BSF_CONSTRUCTOR; 3091 value -= bfd_get_section_vma (abfd, section); 3092 break; 3093 case N_SETD: case N_SETD | N_EXT: 3094 section = obj_datasec (abfd); 3095 flags |= BSF_CONSTRUCTOR; 3096 value -= bfd_get_section_vma (abfd, section); 3097 break; 3098 case N_SETB: case N_SETB | N_EXT: 3099 section = obj_bsssec (abfd); 3100 flags |= BSF_CONSTRUCTOR; 3101 value -= bfd_get_section_vma (abfd, section); 3102 break; 3103 case N_WARNING: 3104 /* A warning symbol. The next symbol is the one to warn 3105 about. If there is no next symbol, just look away. */ 3106 if (p + 1 >= pend) 3107 return TRUE; 3108 ++p; 3109 string = name; 3110 name = strings + GET_WORD (abfd, p->e_strx); 3111 section = bfd_und_section_ptr; 3112 flags |= BSF_WARNING; 3113 break; 3114 case N_WEAKU: 3115 section = bfd_und_section_ptr; 3116 flags = BSF_WEAK; 3117 break; 3118 case N_WEAKA: 3119 section = bfd_abs_section_ptr; 3120 flags = BSF_WEAK; 3121 break; 3122 case N_WEAKT: 3123 section = obj_textsec (abfd); 3124 value -= bfd_get_section_vma (abfd, section); 3125 flags = BSF_WEAK; 3126 break; 3127 case N_WEAKD: 3128 section = obj_datasec (abfd); 3129 value -= bfd_get_section_vma (abfd, section); 3130 flags = BSF_WEAK; 3131 break; 3132 case N_WEAKB: 3133 section = obj_bsssec (abfd); 3134 value -= bfd_get_section_vma (abfd, section); 3135 flags = BSF_WEAK; 3136 break; 3137 } 3138 3139 if (! ((*add_one_symbol) 3140 (info, abfd, name, flags, section, value, string, copy, FALSE, 3141 (struct bfd_link_hash_entry **) sym_hash))) 3142 return FALSE; 3143 3144 /* Restrict the maximum alignment of a common symbol based on 3145 the architecture, since a.out has no way to represent 3146 alignment requirements of a section in a .o file. FIXME: 3147 This isn't quite right: it should use the architecture of the 3148 output file, not the input files. */ 3149 if ((*sym_hash)->root.type == bfd_link_hash_common 3150 && ((*sym_hash)->root.u.c.p->alignment_power > 3151 bfd_get_arch_info (abfd)->section_align_power)) 3152 (*sym_hash)->root.u.c.p->alignment_power = 3153 bfd_get_arch_info (abfd)->section_align_power; 3154 3155 /* If this is a set symbol, and we are not building sets, then 3156 it is possible for the hash entry to not have been set. In 3157 such a case, treat the symbol as not globally defined. */ 3158 if ((*sym_hash)->root.type == bfd_link_hash_new) 3159 { 3160 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3161 *sym_hash = NULL; 3162 } 3163 3164 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3165 ++sym_hash; 3166 } 3167 3168 return TRUE; 3169 } 3170 3171 /* Free up the internal symbols read from an a.out file. */ 3172 3173 static bfd_boolean 3174 aout_link_free_symbols (bfd *abfd) 3175 { 3176 if (obj_aout_external_syms (abfd) != NULL) 3177 { 3178 #ifdef USE_MMAP 3179 bfd_free_window (&obj_aout_sym_window (abfd)); 3180 #else 3181 free ((void *) obj_aout_external_syms (abfd)); 3182 #endif 3183 obj_aout_external_syms (abfd) = NULL; 3184 } 3185 if (obj_aout_external_strings (abfd) != NULL) 3186 { 3187 #ifdef USE_MMAP 3188 bfd_free_window (&obj_aout_string_window (abfd)); 3189 #else 3190 free ((void *) obj_aout_external_strings (abfd)); 3191 #endif 3192 obj_aout_external_strings (abfd) = NULL; 3193 } 3194 return TRUE; 3195 } 3196 3197 /* Add symbols from an a.out object file. */ 3198 3199 static bfd_boolean 3200 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) 3201 { 3202 if (! aout_get_external_symbols (abfd)) 3203 return FALSE; 3204 if (! aout_link_add_symbols (abfd, info)) 3205 return FALSE; 3206 if (! info->keep_memory) 3207 { 3208 if (! aout_link_free_symbols (abfd)) 3209 return FALSE; 3210 } 3211 return TRUE; 3212 } 3213 3214 /* Look through the internal symbols to see if this object file should 3215 be included in the link. We should include this object file if it 3216 defines any symbols which are currently undefined. If this object 3217 file defines a common symbol, then we may adjust the size of the 3218 known symbol but we do not include the object file in the link 3219 (unless there is some other reason to include it). */ 3220 3221 static bfd_boolean 3222 aout_link_check_ar_symbols (bfd *abfd, 3223 struct bfd_link_info *info, 3224 bfd_boolean *pneeded, 3225 bfd **subsbfd) 3226 { 3227 struct external_nlist *p; 3228 struct external_nlist *pend; 3229 char *strings; 3230 3231 *pneeded = FALSE; 3232 3233 /* Look through all the symbols. */ 3234 p = obj_aout_external_syms (abfd); 3235 pend = p + obj_aout_external_sym_count (abfd); 3236 strings = obj_aout_external_strings (abfd); 3237 for (; p < pend; p++) 3238 { 3239 int type = H_GET_8 (abfd, p->e_type); 3240 const char *name; 3241 struct bfd_link_hash_entry *h; 3242 3243 /* Ignore symbols that are not externally visible. This is an 3244 optimization only, as we check the type more thoroughly 3245 below. */ 3246 if (((type & N_EXT) == 0 3247 || (type & N_STAB) != 0 3248 || type == N_FN) 3249 && type != N_WEAKA 3250 && type != N_WEAKT 3251 && type != N_WEAKD 3252 && type != N_WEAKB) 3253 { 3254 if (type == N_WARNING 3255 || type == N_INDR) 3256 ++p; 3257 continue; 3258 } 3259 3260 name = strings + GET_WORD (abfd, p->e_strx); 3261 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 3262 3263 /* We are only interested in symbols that are currently 3264 undefined or common. */ 3265 if (h == NULL 3266 || (h->type != bfd_link_hash_undefined 3267 && h->type != bfd_link_hash_common)) 3268 { 3269 if (type == (N_INDR | N_EXT)) 3270 ++p; 3271 continue; 3272 } 3273 3274 if (type == (N_TEXT | N_EXT) 3275 || type == (N_DATA | N_EXT) 3276 || type == (N_BSS | N_EXT) 3277 || type == (N_ABS | N_EXT) 3278 || type == (N_INDR | N_EXT)) 3279 { 3280 /* This object file defines this symbol. We must link it 3281 in. This is true regardless of whether the current 3282 definition of the symbol is undefined or common. 3283 3284 If the current definition is common, we have a case in 3285 which we have already seen an object file including: 3286 int a; 3287 and this object file from the archive includes: 3288 int a = 5; 3289 In such a case, whether to include this object is target 3290 dependant for backward compatibility. 3291 3292 FIXME: The SunOS 4.1.3 linker will pull in the archive 3293 element if the symbol is defined in the .data section, 3294 but not if it is defined in the .text section. That 3295 seems a bit crazy to me, and it has not been implemented 3296 yet. However, it might be correct. */ 3297 if (h->type == bfd_link_hash_common) 3298 { 3299 int skip = 0; 3300 3301 switch (info->common_skip_ar_symbols) 3302 { 3303 case bfd_link_common_skip_text: 3304 skip = (type == (N_TEXT | N_EXT)); 3305 break; 3306 case bfd_link_common_skip_data: 3307 skip = (type == (N_DATA | N_EXT)); 3308 break; 3309 default: 3310 case bfd_link_common_skip_all: 3311 skip = 1; 3312 break; 3313 } 3314 3315 if (skip) 3316 continue; 3317 } 3318 3319 if (!(*info->callbacks 3320 ->add_archive_element) (info, abfd, name, subsbfd)) 3321 return FALSE; 3322 *pneeded = TRUE; 3323 return TRUE; 3324 } 3325 3326 if (type == (N_UNDF | N_EXT)) 3327 { 3328 bfd_vma value; 3329 3330 value = GET_WORD (abfd, p->e_value); 3331 if (value != 0) 3332 { 3333 /* This symbol is common in the object from the archive 3334 file. */ 3335 if (h->type == bfd_link_hash_undefined) 3336 { 3337 bfd *symbfd; 3338 unsigned int power; 3339 3340 symbfd = h->u.undef.abfd; 3341 if (symbfd == NULL) 3342 { 3343 /* This symbol was created as undefined from 3344 outside BFD. We assume that we should link 3345 in the object file. This is done for the -u 3346 option in the linker. */ 3347 if (!(*info->callbacks 3348 ->add_archive_element) (info, abfd, name, subsbfd)) 3349 return FALSE; 3350 *pneeded = TRUE; 3351 return TRUE; 3352 } 3353 /* Turn the current link symbol into a common 3354 symbol. It is already on the undefs list. */ 3355 h->type = bfd_link_hash_common; 3356 h->u.c.p = (struct bfd_link_hash_common_entry *) 3357 bfd_hash_allocate (&info->hash->table, 3358 sizeof (struct bfd_link_hash_common_entry)); 3359 if (h->u.c.p == NULL) 3360 return FALSE; 3361 3362 h->u.c.size = value; 3363 3364 /* FIXME: This isn't quite right. The maximum 3365 alignment of a common symbol should be set by the 3366 architecture of the output file, not of the input 3367 file. */ 3368 power = bfd_log2 (value); 3369 if (power > bfd_get_arch_info (abfd)->section_align_power) 3370 power = bfd_get_arch_info (abfd)->section_align_power; 3371 h->u.c.p->alignment_power = power; 3372 3373 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3374 "COMMON"); 3375 } 3376 else 3377 { 3378 /* Adjust the size of the common symbol if 3379 necessary. */ 3380 if (value > h->u.c.size) 3381 h->u.c.size = value; 3382 } 3383 } 3384 } 3385 3386 if (type == N_WEAKA 3387 || type == N_WEAKT 3388 || type == N_WEAKD 3389 || type == N_WEAKB) 3390 { 3391 /* This symbol is weak but defined. We must pull it in if 3392 the current link symbol is undefined, but we don't want 3393 it if the current link symbol is common. */ 3394 if (h->type == bfd_link_hash_undefined) 3395 { 3396 if (!(*info->callbacks 3397 ->add_archive_element) (info, abfd, name, subsbfd)) 3398 return FALSE; 3399 *pneeded = TRUE; 3400 return TRUE; 3401 } 3402 } 3403 } 3404 3405 /* We do not need this object file. */ 3406 return TRUE; 3407 } 3408 /* Check a single archive element to see if we need to include it in 3409 the link. *PNEEDED is set according to whether this element is 3410 needed in the link or not. This is called from 3411 _bfd_generic_link_add_archive_symbols. */ 3412 3413 static bfd_boolean 3414 aout_link_check_archive_element (bfd *abfd, 3415 struct bfd_link_info *info, 3416 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED, 3417 const char *name ATTRIBUTE_UNUSED, 3418 bfd_boolean *pneeded) 3419 { 3420 bfd *oldbfd; 3421 bfd_boolean needed; 3422 3423 if (!aout_get_external_symbols (abfd)) 3424 return FALSE; 3425 3426 oldbfd = abfd; 3427 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd)) 3428 return FALSE; 3429 3430 needed = *pneeded; 3431 if (needed) 3432 { 3433 /* Potentially, the add_archive_element hook may have set a 3434 substitute BFD for us. */ 3435 if (abfd != oldbfd) 3436 { 3437 if (!info->keep_memory 3438 && !aout_link_free_symbols (oldbfd)) 3439 return FALSE; 3440 if (!aout_get_external_symbols (abfd)) 3441 return FALSE; 3442 } 3443 if (!aout_link_add_symbols (abfd, info)) 3444 return FALSE; 3445 } 3446 3447 if (!info->keep_memory || !needed) 3448 { 3449 if (!aout_link_free_symbols (abfd)) 3450 return FALSE; 3451 } 3452 3453 return TRUE; 3454 } 3455 3456 /* Given an a.out BFD, add symbols to the global hash table as 3457 appropriate. */ 3458 3459 bfd_boolean 3460 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) 3461 { 3462 switch (bfd_get_format (abfd)) 3463 { 3464 case bfd_object: 3465 return aout_link_add_object_symbols (abfd, info); 3466 case bfd_archive: 3467 return _bfd_generic_link_add_archive_symbols 3468 (abfd, info, aout_link_check_archive_element); 3469 default: 3470 bfd_set_error (bfd_error_wrong_format); 3471 return FALSE; 3472 } 3473 } 3474 3475 /* A hash table used for header files with N_BINCL entries. */ 3477 3478 struct aout_link_includes_table 3479 { 3480 struct bfd_hash_table root; 3481 }; 3482 3483 /* A linked list of totals that we have found for a particular header 3484 file. */ 3485 3486 struct aout_link_includes_totals 3487 { 3488 struct aout_link_includes_totals *next; 3489 bfd_vma total; 3490 }; 3491 3492 /* An entry in the header file hash table. */ 3493 3494 struct aout_link_includes_entry 3495 { 3496 struct bfd_hash_entry root; 3497 /* List of totals we have found for this file. */ 3498 struct aout_link_includes_totals *totals; 3499 }; 3500 3501 /* Look up an entry in an the header file hash table. */ 3502 3503 #define aout_link_includes_lookup(table, string, create, copy) \ 3504 ((struct aout_link_includes_entry *) \ 3505 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3506 3507 /* During the final link step we need to pass around a bunch of 3508 information, so we do it in an instance of this structure. */ 3509 3510 struct aout_final_link_info 3511 { 3512 /* General link information. */ 3513 struct bfd_link_info *info; 3514 /* Output bfd. */ 3515 bfd *output_bfd; 3516 /* Reloc file positions. */ 3517 file_ptr treloff, dreloff; 3518 /* File position of symbols. */ 3519 file_ptr symoff; 3520 /* String table. */ 3521 struct bfd_strtab_hash *strtab; 3522 /* Header file hash table. */ 3523 struct aout_link_includes_table includes; 3524 /* A buffer large enough to hold the contents of any section. */ 3525 bfd_byte *contents; 3526 /* A buffer large enough to hold the relocs of any section. */ 3527 void * relocs; 3528 /* A buffer large enough to hold the symbol map of any input BFD. */ 3529 int *symbol_map; 3530 /* A buffer large enough to hold output symbols of any input BFD. */ 3531 struct external_nlist *output_syms; 3532 }; 3533 3534 /* The function to create a new entry in the header file hash table. */ 3535 3536 static struct bfd_hash_entry * 3537 aout_link_includes_newfunc (struct bfd_hash_entry *entry, 3538 struct bfd_hash_table *table, 3539 const char *string) 3540 { 3541 struct aout_link_includes_entry *ret = 3542 (struct aout_link_includes_entry *) entry; 3543 3544 /* Allocate the structure if it has not already been allocated by a 3545 subclass. */ 3546 if (ret == NULL) 3547 ret = (struct aout_link_includes_entry *) 3548 bfd_hash_allocate (table, sizeof (* ret)); 3549 if (ret == NULL) 3550 return NULL; 3551 3552 /* Call the allocation method of the superclass. */ 3553 ret = ((struct aout_link_includes_entry *) 3554 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3555 if (ret) 3556 { 3557 /* Set local fields. */ 3558 ret->totals = NULL; 3559 } 3560 3561 return (struct bfd_hash_entry *) ret; 3562 } 3563 3564 /* Write out a symbol that was not associated with an a.out input 3565 object. */ 3566 3567 static bfd_boolean 3568 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data) 3569 { 3570 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh; 3571 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data; 3572 bfd *output_bfd; 3573 int type; 3574 bfd_vma val; 3575 struct external_nlist outsym; 3576 bfd_size_type indx; 3577 bfd_size_type amt; 3578 3579 if (h->root.type == bfd_link_hash_warning) 3580 { 3581 h = (struct aout_link_hash_entry *) h->root.u.i.link; 3582 if (h->root.type == bfd_link_hash_new) 3583 return TRUE; 3584 } 3585 3586 output_bfd = flaginfo->output_bfd; 3587 3588 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 3589 { 3590 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 3591 (output_bfd, flaginfo->info, h))) 3592 { 3593 /* FIXME: No way to handle errors. */ 3594 abort (); 3595 } 3596 } 3597 3598 if (h->written) 3599 return TRUE; 3600 3601 h->written = TRUE; 3602 3603 /* An indx of -2 means the symbol must be written. */ 3604 if (h->indx != -2 3605 && (flaginfo->info->strip == strip_all 3606 || (flaginfo->info->strip == strip_some 3607 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string, 3608 FALSE, FALSE) == NULL))) 3609 return TRUE; 3610 3611 switch (h->root.type) 3612 { 3613 default: 3614 case bfd_link_hash_warning: 3615 abort (); 3616 /* Avoid variable not initialized warnings. */ 3617 return TRUE; 3618 case bfd_link_hash_new: 3619 /* This can happen for set symbols when sets are not being 3620 built. */ 3621 return TRUE; 3622 case bfd_link_hash_undefined: 3623 type = N_UNDF | N_EXT; 3624 val = 0; 3625 break; 3626 case bfd_link_hash_defined: 3627 case bfd_link_hash_defweak: 3628 { 3629 asection *sec; 3630 3631 sec = h->root.u.def.section->output_section; 3632 BFD_ASSERT (bfd_is_abs_section (sec) 3633 || sec->owner == output_bfd); 3634 if (sec == obj_textsec (output_bfd)) 3635 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 3636 else if (sec == obj_datasec (output_bfd)) 3637 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 3638 else if (sec == obj_bsssec (output_bfd)) 3639 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 3640 else 3641 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 3642 type |= N_EXT; 3643 val = (h->root.u.def.value 3644 + sec->vma 3645 + h->root.u.def.section->output_offset); 3646 } 3647 break; 3648 case bfd_link_hash_common: 3649 type = N_UNDF | N_EXT; 3650 val = h->root.u.c.size; 3651 break; 3652 case bfd_link_hash_undefweak: 3653 type = N_WEAKU; 3654 val = 0; 3655 break; 3656 case bfd_link_hash_indirect: 3657 /* We ignore these symbols, since the indirected symbol is 3658 already in the hash table. */ 3659 return TRUE; 3660 } 3661 3662 H_PUT_8 (output_bfd, type, outsym.e_type); 3663 H_PUT_8 (output_bfd, 0, outsym.e_other); 3664 H_PUT_16 (output_bfd, 0, outsym.e_desc); 3665 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string, 3666 FALSE); 3667 if (indx == - (bfd_size_type) 1) 3668 /* FIXME: No way to handle errors. */ 3669 abort (); 3670 3671 PUT_WORD (output_bfd, indx, outsym.e_strx); 3672 PUT_WORD (output_bfd, val, outsym.e_value); 3673 3674 amt = EXTERNAL_NLIST_SIZE; 3675 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0 3676 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) 3677 /* FIXME: No way to handle errors. */ 3678 abort (); 3679 3680 flaginfo->symoff += EXTERNAL_NLIST_SIZE; 3681 h->indx = obj_aout_external_sym_count (output_bfd); 3682 ++obj_aout_external_sym_count (output_bfd); 3683 3684 return TRUE; 3685 } 3686 3687 /* Handle a link order which is supposed to generate a reloc. */ 3688 3689 static bfd_boolean 3690 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo, 3691 asection *o, 3692 struct bfd_link_order *p) 3693 { 3694 struct bfd_link_order_reloc *pr; 3695 int r_index; 3696 int r_extern; 3697 reloc_howto_type *howto; 3698 file_ptr *reloff_ptr = NULL; 3699 struct reloc_std_external srel; 3700 struct reloc_ext_external erel; 3701 void * rel_ptr; 3702 bfd_size_type amt; 3703 3704 pr = p->u.reloc.p; 3705 3706 if (p->type == bfd_section_reloc_link_order) 3707 { 3708 r_extern = 0; 3709 if (bfd_is_abs_section (pr->u.section)) 3710 r_index = N_ABS | N_EXT; 3711 else 3712 { 3713 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd); 3714 r_index = pr->u.section->target_index; 3715 } 3716 } 3717 else 3718 { 3719 struct aout_link_hash_entry *h; 3720 3721 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 3722 r_extern = 1; 3723 h = ((struct aout_link_hash_entry *) 3724 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info, 3725 pr->u.name, FALSE, FALSE, TRUE)); 3726 if (h != NULL 3727 && h->indx >= 0) 3728 r_index = h->indx; 3729 else if (h != NULL) 3730 { 3731 /* We decided to strip this symbol, but it turns out that we 3732 can't. Note that we lose the other and desc information 3733 here. I don't think that will ever matter for a global 3734 symbol. */ 3735 h->indx = -2; 3736 h->written = FALSE; 3737 if (!aout_link_write_other_symbol (&h->root.root, flaginfo)) 3738 return FALSE; 3739 r_index = h->indx; 3740 } 3741 else 3742 { 3743 if (! ((*flaginfo->info->callbacks->unattached_reloc) 3744 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0))) 3745 return FALSE; 3746 r_index = 0; 3747 } 3748 } 3749 3750 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc); 3751 if (howto == 0) 3752 { 3753 bfd_set_error (bfd_error_bad_value); 3754 return FALSE; 3755 } 3756 3757 if (o == obj_textsec (flaginfo->output_bfd)) 3758 reloff_ptr = &flaginfo->treloff; 3759 else if (o == obj_datasec (flaginfo->output_bfd)) 3760 reloff_ptr = &flaginfo->dreloff; 3761 else 3762 abort (); 3763 3764 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE) 3765 { 3766 #ifdef MY_put_reloc 3767 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto, 3768 &srel); 3769 #else 3770 { 3771 int r_pcrel; 3772 int r_baserel; 3773 int r_jmptable; 3774 int r_relative; 3775 int r_length; 3776 3777 r_pcrel = (int) howto->pc_relative; 3778 r_baserel = (howto->type & 8) != 0; 3779 r_jmptable = (howto->type & 16) != 0; 3780 r_relative = (howto->type & 32) != 0; 3781 r_length = howto->size; 3782 3783 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address); 3784 if (bfd_header_big_endian (flaginfo->output_bfd)) 3785 { 3786 srel.r_index[0] = r_index >> 16; 3787 srel.r_index[1] = r_index >> 8; 3788 srel.r_index[2] = r_index; 3789 srel.r_type[0] = 3790 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 3791 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 3792 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 3793 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 3794 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 3795 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 3796 } 3797 else 3798 { 3799 srel.r_index[2] = r_index >> 16; 3800 srel.r_index[1] = r_index >> 8; 3801 srel.r_index[0] = r_index; 3802 srel.r_type[0] = 3803 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 3804 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 3805 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 3806 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 3807 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 3808 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 3809 } 3810 } 3811 #endif 3812 rel_ptr = (void *) &srel; 3813 3814 /* We have to write the addend into the object file, since 3815 standard a.out relocs are in place. It would be more 3816 reliable if we had the current contents of the file here, 3817 rather than assuming zeroes, but we can't read the file since 3818 it was opened using bfd_openw. */ 3819 if (pr->addend != 0) 3820 { 3821 bfd_size_type size; 3822 bfd_reloc_status_type r; 3823 bfd_byte *buf; 3824 bfd_boolean ok; 3825 3826 size = bfd_get_reloc_size (howto); 3827 buf = (bfd_byte *) bfd_zmalloc (size); 3828 if (buf == NULL) 3829 return FALSE; 3830 r = MY_relocate_contents (howto, flaginfo->output_bfd, 3831 (bfd_vma) pr->addend, buf); 3832 switch (r) 3833 { 3834 case bfd_reloc_ok: 3835 break; 3836 default: 3837 case bfd_reloc_outofrange: 3838 abort (); 3839 case bfd_reloc_overflow: 3840 if (! ((*flaginfo->info->callbacks->reloc_overflow) 3841 (flaginfo->info, NULL, 3842 (p->type == bfd_section_reloc_link_order 3843 ? bfd_section_name (flaginfo->output_bfd, 3844 pr->u.section) 3845 : pr->u.name), 3846 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0))) 3847 { 3848 free (buf); 3849 return FALSE; 3850 } 3851 break; 3852 } 3853 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf, 3854 (file_ptr) p->offset, size); 3855 free (buf); 3856 if (! ok) 3857 return FALSE; 3858 } 3859 } 3860 else 3861 { 3862 #ifdef MY_put_ext_reloc 3863 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, 3864 howto, &erel, pr->addend); 3865 #else 3866 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address); 3867 3868 if (bfd_header_big_endian (flaginfo->output_bfd)) 3869 { 3870 erel.r_index[0] = r_index >> 16; 3871 erel.r_index[1] = r_index >> 8; 3872 erel.r_index[2] = r_index; 3873 erel.r_type[0] = 3874 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 3875 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 3876 } 3877 else 3878 { 3879 erel.r_index[2] = r_index >> 16; 3880 erel.r_index[1] = r_index >> 8; 3881 erel.r_index[0] = r_index; 3882 erel.r_type[0] = 3883 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 3884 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 3885 } 3886 3887 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 3888 #endif /* MY_put_ext_reloc */ 3889 3890 rel_ptr = (void *) &erel; 3891 } 3892 3893 amt = obj_reloc_entry_size (flaginfo->output_bfd); 3894 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 3895 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt) 3896 return FALSE; 3897 3898 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd); 3899 3900 /* Assert that the relocs have not run into the symbols, and that n 3901 the text relocs have not run into the data relocs. */ 3902 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 3903 && (reloff_ptr != &flaginfo->treloff 3904 || (*reloff_ptr 3905 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 3906 3907 return TRUE; 3908 } 3909 3910 /* Get the section corresponding to a reloc index. */ 3911 3912 static INLINE asection * 3913 aout_reloc_index_to_section (bfd *abfd, int indx) 3914 { 3915 switch (indx & N_TYPE) 3916 { 3917 case N_TEXT: return obj_textsec (abfd); 3918 case N_DATA: return obj_datasec (abfd); 3919 case N_BSS: return obj_bsssec (abfd); 3920 case N_ABS: 3921 case N_UNDF: return bfd_abs_section_ptr; 3922 default: abort (); 3923 } 3924 return NULL; 3925 } 3926 3927 /* Relocate an a.out section using standard a.out relocs. */ 3928 3929 static bfd_boolean 3930 aout_link_input_section_std (struct aout_final_link_info *flaginfo, 3931 bfd *input_bfd, 3932 asection *input_section, 3933 struct reloc_std_external *relocs, 3934 bfd_size_type rel_size, 3935 bfd_byte *contents) 3936 { 3937 bfd_boolean (*check_dynamic_reloc) 3938 (struct bfd_link_info *, bfd *, asection *, 3939 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 3940 bfd_vma *); 3941 bfd *output_bfd; 3942 bfd_boolean relocatable; 3943 struct external_nlist *syms; 3944 char *strings; 3945 struct aout_link_hash_entry **sym_hashes; 3946 int *symbol_map; 3947 bfd_size_type reloc_count; 3948 struct reloc_std_external *rel; 3949 struct reloc_std_external *rel_end; 3950 3951 output_bfd = flaginfo->output_bfd; 3952 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 3953 3954 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 3955 BFD_ASSERT (input_bfd->xvec->header_byteorder 3956 == output_bfd->xvec->header_byteorder); 3957 3958 relocatable = flaginfo->info->relocatable; 3959 syms = obj_aout_external_syms (input_bfd); 3960 strings = obj_aout_external_strings (input_bfd); 3961 sym_hashes = obj_aout_sym_hashes (input_bfd); 3962 symbol_map = flaginfo->symbol_map; 3963 3964 reloc_count = rel_size / RELOC_STD_SIZE; 3965 rel = relocs; 3966 rel_end = rel + reloc_count; 3967 for (; rel < rel_end; rel++) 3968 { 3969 bfd_vma r_addr; 3970 int r_index; 3971 int r_extern; 3972 int r_pcrel; 3973 int r_baserel = 0; 3974 reloc_howto_type *howto; 3975 struct aout_link_hash_entry *h = NULL; 3976 bfd_vma relocation; 3977 bfd_reloc_status_type r; 3978 3979 r_addr = GET_SWORD (input_bfd, rel->r_address); 3980 3981 #ifdef MY_reloc_howto 3982 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 3983 #else 3984 { 3985 int r_jmptable; 3986 int r_relative; 3987 int r_length; 3988 unsigned int howto_idx; 3989 3990 if (bfd_header_big_endian (input_bfd)) 3991 { 3992 r_index = (((unsigned int) rel->r_index[0] << 16) 3993 | ((unsigned int) rel->r_index[1] << 8) 3994 | rel->r_index[2]); 3995 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 3996 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 3997 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 3998 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 3999 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 4000 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 4001 >> RELOC_STD_BITS_LENGTH_SH_BIG); 4002 } 4003 else 4004 { 4005 r_index = (((unsigned int) rel->r_index[2] << 16) 4006 | ((unsigned int) rel->r_index[1] << 8) 4007 | rel->r_index[0]); 4008 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 4009 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 4010 r_baserel = (0 != (rel->r_type[0] 4011 & RELOC_STD_BITS_BASEREL_LITTLE)); 4012 r_jmptable= (0 != (rel->r_type[0] 4013 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 4014 r_relative= (0 != (rel->r_type[0] 4015 & RELOC_STD_BITS_RELATIVE_LITTLE)); 4016 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 4017 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 4018 } 4019 4020 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 4021 + 16 * r_jmptable + 32 * r_relative); 4022 if (howto_idx < TABLE_SIZE (howto_table_std)) 4023 howto = howto_table_std + howto_idx; 4024 else 4025 howto = NULL; 4026 } 4027 #endif 4028 4029 if (howto == NULL) 4030 { 4031 (*flaginfo->info->callbacks->einfo) 4032 (_("%P: %B: unexpected relocation type\n"), input_bfd); 4033 bfd_set_error (bfd_error_bad_value); 4034 return FALSE; 4035 } 4036 4037 if (relocatable) 4038 { 4039 /* We are generating a relocatable output file, and must 4040 modify the reloc accordingly. */ 4041 if (r_extern) 4042 { 4043 /* If we know the symbol this relocation is against, 4044 convert it into a relocation against a section. This 4045 is what the native linker does. */ 4046 h = sym_hashes[r_index]; 4047 if (h != NULL 4048 && (h->root.type == bfd_link_hash_defined 4049 || h->root.type == bfd_link_hash_defweak)) 4050 { 4051 asection *output_section; 4052 4053 /* Change the r_extern value. */ 4054 if (bfd_header_big_endian (output_bfd)) 4055 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4056 else 4057 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4058 4059 /* Compute a new r_index. */ 4060 output_section = h->root.u.def.section->output_section; 4061 if (output_section == obj_textsec (output_bfd)) 4062 r_index = N_TEXT; 4063 else if (output_section == obj_datasec (output_bfd)) 4064 r_index = N_DATA; 4065 else if (output_section == obj_bsssec (output_bfd)) 4066 r_index = N_BSS; 4067 else 4068 r_index = N_ABS; 4069 4070 /* Add the symbol value and the section VMA to the 4071 addend stored in the contents. */ 4072 relocation = (h->root.u.def.value 4073 + output_section->vma 4074 + h->root.u.def.section->output_offset); 4075 } 4076 else 4077 { 4078 /* We must change r_index according to the symbol 4079 map. */ 4080 r_index = symbol_map[r_index]; 4081 4082 if (r_index == -1) 4083 { 4084 if (h != NULL) 4085 { 4086 /* We decided to strip this symbol, but it 4087 turns out that we can't. Note that we 4088 lose the other and desc information here. 4089 I don't think that will ever matter for a 4090 global symbol. */ 4091 if (h->indx < 0) 4092 { 4093 h->indx = -2; 4094 h->written = FALSE; 4095 if (!aout_link_write_other_symbol (&h->root.root, 4096 flaginfo)) 4097 return FALSE; 4098 } 4099 r_index = h->indx; 4100 } 4101 else 4102 { 4103 const char *name; 4104 4105 name = strings + GET_WORD (input_bfd, 4106 syms[r_index].e_strx); 4107 if (! ((*flaginfo->info->callbacks->unattached_reloc) 4108 (flaginfo->info, name, input_bfd, input_section, 4109 r_addr))) 4110 return FALSE; 4111 r_index = 0; 4112 } 4113 } 4114 4115 relocation = 0; 4116 } 4117 4118 /* Write out the new r_index value. */ 4119 if (bfd_header_big_endian (output_bfd)) 4120 { 4121 rel->r_index[0] = r_index >> 16; 4122 rel->r_index[1] = r_index >> 8; 4123 rel->r_index[2] = r_index; 4124 } 4125 else 4126 { 4127 rel->r_index[2] = r_index >> 16; 4128 rel->r_index[1] = r_index >> 8; 4129 rel->r_index[0] = r_index; 4130 } 4131 } 4132 else 4133 { 4134 asection *section; 4135 4136 /* This is a relocation against a section. We must 4137 adjust by the amount that the section moved. */ 4138 section = aout_reloc_index_to_section (input_bfd, r_index); 4139 relocation = (section->output_section->vma 4140 + section->output_offset 4141 - section->vma); 4142 } 4143 4144 /* Change the address of the relocation. */ 4145 PUT_WORD (output_bfd, 4146 r_addr + input_section->output_offset, 4147 rel->r_address); 4148 4149 /* Adjust a PC relative relocation by removing the reference 4150 to the original address in the section and including the 4151 reference to the new address. */ 4152 if (r_pcrel) 4153 relocation -= (input_section->output_section->vma 4154 + input_section->output_offset 4155 - input_section->vma); 4156 4157 #ifdef MY_relocatable_reloc 4158 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4159 #endif 4160 4161 if (relocation == 0) 4162 r = bfd_reloc_ok; 4163 else 4164 r = MY_relocate_contents (howto, 4165 input_bfd, relocation, 4166 contents + r_addr); 4167 } 4168 else 4169 { 4170 bfd_boolean hundef; 4171 4172 /* We are generating an executable, and must do a full 4173 relocation. */ 4174 hundef = FALSE; 4175 4176 if (r_extern) 4177 { 4178 h = sym_hashes[r_index]; 4179 4180 if (h != NULL 4181 && (h->root.type == bfd_link_hash_defined 4182 || h->root.type == bfd_link_hash_defweak)) 4183 { 4184 relocation = (h->root.u.def.value 4185 + h->root.u.def.section->output_section->vma 4186 + h->root.u.def.section->output_offset); 4187 } 4188 else if (h != NULL 4189 && h->root.type == bfd_link_hash_undefweak) 4190 relocation = 0; 4191 else 4192 { 4193 hundef = TRUE; 4194 relocation = 0; 4195 } 4196 } 4197 else 4198 { 4199 asection *section; 4200 4201 section = aout_reloc_index_to_section (input_bfd, r_index); 4202 relocation = (section->output_section->vma 4203 + section->output_offset 4204 - section->vma); 4205 if (r_pcrel) 4206 relocation += input_section->vma; 4207 } 4208 4209 if (check_dynamic_reloc != NULL) 4210 { 4211 bfd_boolean skip; 4212 4213 if (! ((*check_dynamic_reloc) 4214 (flaginfo->info, input_bfd, input_section, h, 4215 (void *) rel, contents, &skip, &relocation))) 4216 return FALSE; 4217 if (skip) 4218 continue; 4219 } 4220 4221 /* Now warn if a global symbol is undefined. We could not 4222 do this earlier, because check_dynamic_reloc might want 4223 to skip this reloc. */ 4224 if (hundef && ! flaginfo->info->shared && ! r_baserel) 4225 { 4226 const char *name; 4227 4228 if (h != NULL) 4229 name = h->root.root.string; 4230 else 4231 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4232 if (! ((*flaginfo->info->callbacks->undefined_symbol) 4233 (flaginfo->info, name, input_bfd, input_section, 4234 r_addr, TRUE))) 4235 return FALSE; 4236 } 4237 4238 r = MY_final_link_relocate (howto, 4239 input_bfd, input_section, 4240 contents, r_addr, relocation, 4241 (bfd_vma) 0); 4242 } 4243 4244 if (r != bfd_reloc_ok) 4245 { 4246 switch (r) 4247 { 4248 default: 4249 case bfd_reloc_outofrange: 4250 abort (); 4251 case bfd_reloc_overflow: 4252 { 4253 const char *name; 4254 4255 if (h != NULL) 4256 name = NULL; 4257 else if (r_extern) 4258 name = strings + GET_WORD (input_bfd, 4259 syms[r_index].e_strx); 4260 else 4261 { 4262 asection *s; 4263 4264 s = aout_reloc_index_to_section (input_bfd, r_index); 4265 name = bfd_section_name (input_bfd, s); 4266 } 4267 if (! ((*flaginfo->info->callbacks->reloc_overflow) 4268 (flaginfo->info, (h ? &h->root : NULL), name, 4269 howto->name, (bfd_vma) 0, input_bfd, 4270 input_section, r_addr))) 4271 return FALSE; 4272 } 4273 break; 4274 } 4275 } 4276 } 4277 4278 return TRUE; 4279 } 4280 4281 /* Relocate an a.out section using extended a.out relocs. */ 4282 4283 static bfd_boolean 4284 aout_link_input_section_ext (struct aout_final_link_info *flaginfo, 4285 bfd *input_bfd, 4286 asection *input_section, 4287 struct reloc_ext_external *relocs, 4288 bfd_size_type rel_size, 4289 bfd_byte *contents) 4290 { 4291 bfd_boolean (*check_dynamic_reloc) 4292 (struct bfd_link_info *, bfd *, asection *, 4293 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 4294 bfd_vma *); 4295 bfd *output_bfd; 4296 bfd_boolean relocatable; 4297 struct external_nlist *syms; 4298 char *strings; 4299 struct aout_link_hash_entry **sym_hashes; 4300 int *symbol_map; 4301 bfd_size_type reloc_count; 4302 struct reloc_ext_external *rel; 4303 struct reloc_ext_external *rel_end; 4304 4305 output_bfd = flaginfo->output_bfd; 4306 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4307 4308 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 4309 BFD_ASSERT (input_bfd->xvec->header_byteorder 4310 == output_bfd->xvec->header_byteorder); 4311 4312 relocatable = flaginfo->info->relocatable; 4313 syms = obj_aout_external_syms (input_bfd); 4314 strings = obj_aout_external_strings (input_bfd); 4315 sym_hashes = obj_aout_sym_hashes (input_bfd); 4316 symbol_map = flaginfo->symbol_map; 4317 4318 reloc_count = rel_size / RELOC_EXT_SIZE; 4319 rel = relocs; 4320 rel_end = rel + reloc_count; 4321 for (; rel < rel_end; rel++) 4322 { 4323 bfd_vma r_addr; 4324 int r_index; 4325 int r_extern; 4326 unsigned int r_type; 4327 bfd_vma r_addend; 4328 struct aout_link_hash_entry *h = NULL; 4329 asection *r_section = NULL; 4330 bfd_vma relocation; 4331 4332 r_addr = GET_SWORD (input_bfd, rel->r_address); 4333 4334 if (bfd_header_big_endian (input_bfd)) 4335 { 4336 r_index = (((unsigned int) rel->r_index[0] << 16) 4337 | ((unsigned int) rel->r_index[1] << 8) 4338 | rel->r_index[2]); 4339 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 4340 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 4341 >> RELOC_EXT_BITS_TYPE_SH_BIG); 4342 } 4343 else 4344 { 4345 r_index = (((unsigned int) rel->r_index[2] << 16) 4346 | ((unsigned int) rel->r_index[1] << 8) 4347 | rel->r_index[0]); 4348 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 4349 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 4350 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 4351 } 4352 4353 r_addend = GET_SWORD (input_bfd, rel->r_addend); 4354 4355 if (r_type >= TABLE_SIZE (howto_table_ext)) 4356 { 4357 (*flaginfo->info->callbacks->einfo) 4358 (_("%P: %B: unexpected relocation type\n"), input_bfd); 4359 bfd_set_error (bfd_error_bad_value); 4360 return FALSE; 4361 } 4362 4363 if (relocatable) 4364 { 4365 /* We are generating a relocatable output file, and must 4366 modify the reloc accordingly. */ 4367 if (r_extern 4368 || r_type == (unsigned int) RELOC_BASE10 4369 || r_type == (unsigned int) RELOC_BASE13 4370 || r_type == (unsigned int) RELOC_BASE22) 4371 { 4372 /* If we know the symbol this relocation is against, 4373 convert it into a relocation against a section. This 4374 is what the native linker does. */ 4375 if (r_type == (unsigned int) RELOC_BASE10 4376 || r_type == (unsigned int) RELOC_BASE13 4377 || r_type == (unsigned int) RELOC_BASE22) 4378 h = NULL; 4379 else 4380 h = sym_hashes[r_index]; 4381 if (h != NULL 4382 && (h->root.type == bfd_link_hash_defined 4383 || h->root.type == bfd_link_hash_defweak)) 4384 { 4385 asection *output_section; 4386 4387 /* Change the r_extern value. */ 4388 if (bfd_header_big_endian (output_bfd)) 4389 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 4390 else 4391 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 4392 4393 /* Compute a new r_index. */ 4394 output_section = h->root.u.def.section->output_section; 4395 if (output_section == obj_textsec (output_bfd)) 4396 r_index = N_TEXT; 4397 else if (output_section == obj_datasec (output_bfd)) 4398 r_index = N_DATA; 4399 else if (output_section == obj_bsssec (output_bfd)) 4400 r_index = N_BSS; 4401 else 4402 r_index = N_ABS; 4403 4404 /* Add the symbol value and the section VMA to the 4405 addend. */ 4406 relocation = (h->root.u.def.value 4407 + output_section->vma 4408 + h->root.u.def.section->output_offset); 4409 4410 /* Now RELOCATION is the VMA of the final 4411 destination. If this is a PC relative reloc, 4412 then ADDEND is the negative of the source VMA. 4413 We want to set ADDEND to the difference between 4414 the destination VMA and the source VMA, which 4415 means we must adjust RELOCATION by the change in 4416 the source VMA. This is done below. */ 4417 } 4418 else 4419 { 4420 /* We must change r_index according to the symbol 4421 map. */ 4422 r_index = symbol_map[r_index]; 4423 4424 if (r_index == -1) 4425 { 4426 if (h != NULL) 4427 { 4428 /* We decided to strip this symbol, but it 4429 turns out that we can't. Note that we 4430 lose the other and desc information here. 4431 I don't think that will ever matter for a 4432 global symbol. */ 4433 if (h->indx < 0) 4434 { 4435 h->indx = -2; 4436 h->written = FALSE; 4437 if (!aout_link_write_other_symbol (&h->root.root, 4438 flaginfo)) 4439 return FALSE; 4440 } 4441 r_index = h->indx; 4442 } 4443 else 4444 { 4445 const char *name; 4446 4447 name = strings + GET_WORD (input_bfd, 4448 syms[r_index].e_strx); 4449 if (! ((*flaginfo->info->callbacks->unattached_reloc) 4450 (flaginfo->info, name, input_bfd, input_section, 4451 r_addr))) 4452 return FALSE; 4453 r_index = 0; 4454 } 4455 } 4456 4457 relocation = 0; 4458 4459 /* If this is a PC relative reloc, then the addend 4460 is the negative of the source VMA. We must 4461 adjust it by the change in the source VMA. This 4462 is done below. */ 4463 } 4464 4465 /* Write out the new r_index value. */ 4466 if (bfd_header_big_endian (output_bfd)) 4467 { 4468 rel->r_index[0] = r_index >> 16; 4469 rel->r_index[1] = r_index >> 8; 4470 rel->r_index[2] = r_index; 4471 } 4472 else 4473 { 4474 rel->r_index[2] = r_index >> 16; 4475 rel->r_index[1] = r_index >> 8; 4476 rel->r_index[0] = r_index; 4477 } 4478 } 4479 else 4480 { 4481 /* This is a relocation against a section. We must 4482 adjust by the amount that the section moved. */ 4483 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4484 relocation = (r_section->output_section->vma 4485 + r_section->output_offset 4486 - r_section->vma); 4487 4488 /* If this is a PC relative reloc, then the addend is 4489 the difference in VMA between the destination and the 4490 source. We have just adjusted for the change in VMA 4491 of the destination, so we must also adjust by the 4492 change in VMA of the source. This is done below. */ 4493 } 4494 4495 /* As described above, we must always adjust a PC relative 4496 reloc by the change in VMA of the source. However, if 4497 pcrel_offset is set, then the addend does not include the 4498 location within the section, in which case we don't need 4499 to adjust anything. */ 4500 if (howto_table_ext[r_type].pc_relative 4501 && ! howto_table_ext[r_type].pcrel_offset) 4502 relocation -= (input_section->output_section->vma 4503 + input_section->output_offset 4504 - input_section->vma); 4505 4506 /* Change the addend if necessary. */ 4507 if (relocation != 0) 4508 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 4509 4510 /* Change the address of the relocation. */ 4511 PUT_WORD (output_bfd, 4512 r_addr + input_section->output_offset, 4513 rel->r_address); 4514 } 4515 else 4516 { 4517 bfd_boolean hundef; 4518 bfd_reloc_status_type r; 4519 4520 /* We are generating an executable, and must do a full 4521 relocation. */ 4522 hundef = FALSE; 4523 4524 if (r_extern) 4525 { 4526 h = sym_hashes[r_index]; 4527 4528 if (h != NULL 4529 && (h->root.type == bfd_link_hash_defined 4530 || h->root.type == bfd_link_hash_defweak)) 4531 { 4532 relocation = (h->root.u.def.value 4533 + h->root.u.def.section->output_section->vma 4534 + h->root.u.def.section->output_offset); 4535 } 4536 else if (h != NULL 4537 && h->root.type == bfd_link_hash_undefweak) 4538 relocation = 0; 4539 else 4540 { 4541 hundef = TRUE; 4542 relocation = 0; 4543 } 4544 } 4545 else if (r_type == (unsigned int) RELOC_BASE10 4546 || r_type == (unsigned int) RELOC_BASE13 4547 || r_type == (unsigned int) RELOC_BASE22) 4548 { 4549 struct external_nlist *sym; 4550 int type; 4551 4552 /* For base relative relocs, r_index is always an index 4553 into the symbol table, even if r_extern is 0. */ 4554 sym = syms + r_index; 4555 type = H_GET_8 (input_bfd, sym->e_type); 4556 if ((type & N_TYPE) == N_TEXT 4557 || type == N_WEAKT) 4558 r_section = obj_textsec (input_bfd); 4559 else if ((type & N_TYPE) == N_DATA 4560 || type == N_WEAKD) 4561 r_section = obj_datasec (input_bfd); 4562 else if ((type & N_TYPE) == N_BSS 4563 || type == N_WEAKB) 4564 r_section = obj_bsssec (input_bfd); 4565 else if ((type & N_TYPE) == N_ABS 4566 || type == N_WEAKA) 4567 r_section = bfd_abs_section_ptr; 4568 else 4569 abort (); 4570 relocation = (r_section->output_section->vma 4571 + r_section->output_offset 4572 + (GET_WORD (input_bfd, sym->e_value) 4573 - r_section->vma)); 4574 } 4575 else 4576 { 4577 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4578 4579 /* If this is a PC relative reloc, then R_ADDEND is the 4580 difference between the two vmas, or 4581 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 4582 where 4583 old_dest_sec == section->vma 4584 and 4585 old_src_sec == input_section->vma 4586 and 4587 old_src_off == r_addr 4588 4589 _bfd_final_link_relocate expects RELOCATION + 4590 R_ADDEND to be the VMA of the destination minus 4591 r_addr (the minus r_addr is because this relocation 4592 is not pcrel_offset, which is a bit confusing and 4593 should, perhaps, be changed), or 4594 new_dest_sec 4595 where 4596 new_dest_sec == output_section->vma + output_offset 4597 We arrange for this to happen by setting RELOCATION to 4598 new_dest_sec + old_src_sec - old_dest_sec 4599 4600 If this is not a PC relative reloc, then R_ADDEND is 4601 simply the VMA of the destination, so we set 4602 RELOCATION to the change in the destination VMA, or 4603 new_dest_sec - old_dest_sec 4604 */ 4605 relocation = (r_section->output_section->vma 4606 + r_section->output_offset 4607 - r_section->vma); 4608 if (howto_table_ext[r_type].pc_relative) 4609 relocation += input_section->vma; 4610 } 4611 4612 if (check_dynamic_reloc != NULL) 4613 { 4614 bfd_boolean skip; 4615 4616 if (! ((*check_dynamic_reloc) 4617 (flaginfo->info, input_bfd, input_section, h, 4618 (void *) rel, contents, &skip, &relocation))) 4619 return FALSE; 4620 if (skip) 4621 continue; 4622 } 4623 4624 /* Now warn if a global symbol is undefined. We could not 4625 do this earlier, because check_dynamic_reloc might want 4626 to skip this reloc. */ 4627 if (hundef 4628 && ! flaginfo->info->shared 4629 && r_type != (unsigned int) RELOC_BASE10 4630 && r_type != (unsigned int) RELOC_BASE13 4631 && r_type != (unsigned int) RELOC_BASE22) 4632 { 4633 const char *name; 4634 4635 if (h != NULL) 4636 name = h->root.root.string; 4637 else 4638 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4639 if (! ((*flaginfo->info->callbacks->undefined_symbol) 4640 (flaginfo->info, name, input_bfd, input_section, 4641 r_addr, TRUE))) 4642 return FALSE; 4643 } 4644 4645 if (r_type != (unsigned int) RELOC_SPARC_REV32) 4646 r = MY_final_link_relocate (howto_table_ext + r_type, 4647 input_bfd, input_section, 4648 contents, r_addr, relocation, 4649 r_addend); 4650 else 4651 { 4652 bfd_vma x; 4653 4654 x = bfd_get_32 (input_bfd, contents + r_addr); 4655 x = x + relocation + r_addend; 4656 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 4657 r = bfd_reloc_ok; 4658 } 4659 4660 if (r != bfd_reloc_ok) 4661 { 4662 switch (r) 4663 { 4664 default: 4665 case bfd_reloc_outofrange: 4666 abort (); 4667 case bfd_reloc_overflow: 4668 { 4669 const char *name; 4670 4671 if (h != NULL) 4672 name = NULL; 4673 else if (r_extern 4674 || r_type == (unsigned int) RELOC_BASE10 4675 || r_type == (unsigned int) RELOC_BASE13 4676 || r_type == (unsigned int) RELOC_BASE22) 4677 name = strings + GET_WORD (input_bfd, 4678 syms[r_index].e_strx); 4679 else 4680 { 4681 asection *s; 4682 4683 s = aout_reloc_index_to_section (input_bfd, r_index); 4684 name = bfd_section_name (input_bfd, s); 4685 } 4686 if (! ((*flaginfo->info->callbacks->reloc_overflow) 4687 (flaginfo->info, (h ? &h->root : NULL), name, 4688 howto_table_ext[r_type].name, 4689 r_addend, input_bfd, input_section, r_addr))) 4690 return FALSE; 4691 } 4692 break; 4693 } 4694 } 4695 } 4696 } 4697 4698 return TRUE; 4699 } 4700 4701 /* Link an a.out section into the output file. */ 4702 4703 static bfd_boolean 4704 aout_link_input_section (struct aout_final_link_info *flaginfo, 4705 bfd *input_bfd, 4706 asection *input_section, 4707 file_ptr *reloff_ptr, 4708 bfd_size_type rel_size) 4709 { 4710 bfd_size_type input_size; 4711 void * relocs; 4712 4713 /* Get the section contents. */ 4714 input_size = input_section->size; 4715 if (! bfd_get_section_contents (input_bfd, input_section, 4716 (void *) flaginfo->contents, 4717 (file_ptr) 0, input_size)) 4718 return FALSE; 4719 4720 /* Read in the relocs if we haven't already done it. */ 4721 if (aout_section_data (input_section) != NULL 4722 && aout_section_data (input_section)->relocs != NULL) 4723 relocs = aout_section_data (input_section)->relocs; 4724 else 4725 { 4726 relocs = flaginfo->relocs; 4727 if (rel_size > 0) 4728 { 4729 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4730 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4731 return FALSE; 4732 } 4733 } 4734 4735 /* Relocate the section contents. */ 4736 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4737 { 4738 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section, 4739 (struct reloc_std_external *) relocs, 4740 rel_size, flaginfo->contents)) 4741 return FALSE; 4742 } 4743 else 4744 { 4745 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section, 4746 (struct reloc_ext_external *) relocs, 4747 rel_size, flaginfo->contents)) 4748 return FALSE; 4749 } 4750 4751 /* Write out the section contents. */ 4752 if (! bfd_set_section_contents (flaginfo->output_bfd, 4753 input_section->output_section, 4754 (void *) flaginfo->contents, 4755 (file_ptr) input_section->output_offset, 4756 input_size)) 4757 return FALSE; 4758 4759 /* If we are producing relocatable output, the relocs were 4760 modified, and we now write them out. */ 4761 if (flaginfo->info->relocatable && rel_size > 0) 4762 { 4763 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4764 return FALSE; 4765 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size) 4766 return FALSE; 4767 *reloff_ptr += rel_size; 4768 4769 /* Assert that the relocs have not run into the symbols, and 4770 that if these are the text relocs they have not run into the 4771 data relocs. */ 4772 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 4773 && (reloff_ptr != &flaginfo->treloff 4774 || (*reloff_ptr 4775 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 4776 } 4777 4778 return TRUE; 4779 } 4780 4781 /* Adjust and write out the symbols for an a.out file. Set the new 4782 symbol indices into a symbol_map. */ 4783 4784 static bfd_boolean 4785 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd) 4786 { 4787 bfd *output_bfd; 4788 bfd_size_type sym_count; 4789 char *strings; 4790 enum bfd_link_strip strip; 4791 enum bfd_link_discard discard; 4792 struct external_nlist *outsym; 4793 bfd_size_type strtab_index; 4794 struct external_nlist *sym; 4795 struct external_nlist *sym_end; 4796 struct aout_link_hash_entry **sym_hash; 4797 int *symbol_map; 4798 bfd_boolean pass; 4799 bfd_boolean skip_next; 4800 4801 output_bfd = flaginfo->output_bfd; 4802 sym_count = obj_aout_external_sym_count (input_bfd); 4803 strings = obj_aout_external_strings (input_bfd); 4804 strip = flaginfo->info->strip; 4805 discard = flaginfo->info->discard; 4806 outsym = flaginfo->output_syms; 4807 4808 /* First write out a symbol for this object file, unless we are 4809 discarding such symbols. */ 4810 if (strip != strip_all 4811 && (strip != strip_some 4812 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename, 4813 FALSE, FALSE) != NULL) 4814 && discard != discard_all) 4815 { 4816 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4817 H_PUT_8 (output_bfd, 0, outsym->e_other); 4818 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4819 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 4820 input_bfd->filename, FALSE); 4821 if (strtab_index == (bfd_size_type) -1) 4822 return FALSE; 4823 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4824 PUT_WORD (output_bfd, 4825 (bfd_get_section_vma (output_bfd, 4826 obj_textsec (input_bfd)->output_section) 4827 + obj_textsec (input_bfd)->output_offset), 4828 outsym->e_value); 4829 ++obj_aout_external_sym_count (output_bfd); 4830 ++outsym; 4831 } 4832 4833 pass = FALSE; 4834 skip_next = FALSE; 4835 sym = obj_aout_external_syms (input_bfd); 4836 sym_end = sym + sym_count; 4837 sym_hash = obj_aout_sym_hashes (input_bfd); 4838 symbol_map = flaginfo->symbol_map; 4839 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4840 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4841 { 4842 const char *name; 4843 int type; 4844 struct aout_link_hash_entry *h; 4845 bfd_boolean skip; 4846 asection *symsec; 4847 bfd_vma val = 0; 4848 bfd_boolean copy; 4849 4850 /* We set *symbol_map to 0 above for all symbols. If it has 4851 already been set to -1 for this symbol, it means that we are 4852 discarding it because it appears in a duplicate header file. 4853 See the N_BINCL code below. */ 4854 if (*symbol_map == -1) 4855 continue; 4856 4857 /* Initialize *symbol_map to -1, which means that the symbol was 4858 not copied into the output file. We will change it later if 4859 we do copy the symbol over. */ 4860 *symbol_map = -1; 4861 4862 type = H_GET_8 (input_bfd, sym->e_type); 4863 name = strings + GET_WORD (input_bfd, sym->e_strx); 4864 4865 h = NULL; 4866 4867 if (pass) 4868 { 4869 /* Pass this symbol through. It is the target of an 4870 indirect or warning symbol. */ 4871 val = GET_WORD (input_bfd, sym->e_value); 4872 pass = FALSE; 4873 } 4874 else if (skip_next) 4875 { 4876 /* Skip this symbol, which is the target of an indirect 4877 symbol that we have changed to no longer be an indirect 4878 symbol. */ 4879 skip_next = FALSE; 4880 continue; 4881 } 4882 else 4883 { 4884 struct aout_link_hash_entry *hresolve; 4885 4886 /* We have saved the hash table entry for this symbol, if 4887 there is one. Note that we could just look it up again 4888 in the hash table, provided we first check that it is an 4889 external symbol. */ 4890 h = *sym_hash; 4891 4892 /* Use the name from the hash table, in case the symbol was 4893 wrapped. */ 4894 if (h != NULL 4895 && h->root.type != bfd_link_hash_warning) 4896 name = h->root.root.string; 4897 4898 /* If this is an indirect or warning symbol, then change 4899 hresolve to the base symbol. We also change *sym_hash so 4900 that the relocation routines relocate against the real 4901 symbol. */ 4902 hresolve = h; 4903 if (h != (struct aout_link_hash_entry *) NULL 4904 && (h->root.type == bfd_link_hash_indirect 4905 || h->root.type == bfd_link_hash_warning)) 4906 { 4907 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4908 while (hresolve->root.type == bfd_link_hash_indirect 4909 || hresolve->root.type == bfd_link_hash_warning) 4910 hresolve = ((struct aout_link_hash_entry *) 4911 hresolve->root.u.i.link); 4912 *sym_hash = hresolve; 4913 } 4914 4915 /* If the symbol has already been written out, skip it. */ 4916 if (h != NULL 4917 && h->written) 4918 { 4919 if ((type & N_TYPE) == N_INDR 4920 || type == N_WARNING) 4921 skip_next = TRUE; 4922 *symbol_map = h->indx; 4923 continue; 4924 } 4925 4926 /* See if we are stripping this symbol. */ 4927 skip = FALSE; 4928 switch (strip) 4929 { 4930 case strip_none: 4931 break; 4932 case strip_debugger: 4933 if ((type & N_STAB) != 0) 4934 skip = TRUE; 4935 break; 4936 case strip_some: 4937 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE) 4938 == NULL) 4939 skip = TRUE; 4940 break; 4941 case strip_all: 4942 skip = TRUE; 4943 break; 4944 } 4945 if (skip) 4946 { 4947 if (h != NULL) 4948 h->written = TRUE; 4949 continue; 4950 } 4951 4952 /* Get the value of the symbol. */ 4953 if ((type & N_TYPE) == N_TEXT 4954 || type == N_WEAKT) 4955 symsec = obj_textsec (input_bfd); 4956 else if ((type & N_TYPE) == N_DATA 4957 || type == N_WEAKD) 4958 symsec = obj_datasec (input_bfd); 4959 else if ((type & N_TYPE) == N_BSS 4960 || type == N_WEAKB) 4961 symsec = obj_bsssec (input_bfd); 4962 else if ((type & N_TYPE) == N_ABS 4963 || type == N_WEAKA) 4964 symsec = bfd_abs_section_ptr; 4965 else if (((type & N_TYPE) == N_INDR 4966 && (hresolve == NULL 4967 || (hresolve->root.type != bfd_link_hash_defined 4968 && hresolve->root.type != bfd_link_hash_defweak 4969 && hresolve->root.type != bfd_link_hash_common))) 4970 || type == N_WARNING) 4971 { 4972 /* Pass the next symbol through unchanged. The 4973 condition above for indirect symbols is so that if 4974 the indirect symbol was defined, we output it with 4975 the correct definition so the debugger will 4976 understand it. */ 4977 pass = TRUE; 4978 val = GET_WORD (input_bfd, sym->e_value); 4979 symsec = NULL; 4980 } 4981 else if ((type & N_STAB) != 0) 4982 { 4983 val = GET_WORD (input_bfd, sym->e_value); 4984 symsec = NULL; 4985 } 4986 else 4987 { 4988 /* If we get here with an indirect symbol, it means that 4989 we are outputting it with a real definition. In such 4990 a case we do not want to output the next symbol, 4991 which is the target of the indirection. */ 4992 if ((type & N_TYPE) == N_INDR) 4993 skip_next = TRUE; 4994 4995 symsec = NULL; 4996 4997 /* We need to get the value from the hash table. We use 4998 hresolve so that if we have defined an indirect 4999 symbol we output the final definition. */ 5000 if (h == NULL) 5001 { 5002 switch (type & N_TYPE) 5003 { 5004 case N_SETT: 5005 symsec = obj_textsec (input_bfd); 5006 break; 5007 case N_SETD: 5008 symsec = obj_datasec (input_bfd); 5009 break; 5010 case N_SETB: 5011 symsec = obj_bsssec (input_bfd); 5012 break; 5013 case N_SETA: 5014 symsec = bfd_abs_section_ptr; 5015 break; 5016 default: 5017 val = 0; 5018 break; 5019 } 5020 } 5021 else if (hresolve->root.type == bfd_link_hash_defined 5022 || hresolve->root.type == bfd_link_hash_defweak) 5023 { 5024 asection *input_section; 5025 asection *output_section; 5026 5027 /* This case usually means a common symbol which was 5028 turned into a defined symbol. */ 5029 input_section = hresolve->root.u.def.section; 5030 output_section = input_section->output_section; 5031 BFD_ASSERT (bfd_is_abs_section (output_section) 5032 || output_section->owner == output_bfd); 5033 val = (hresolve->root.u.def.value 5034 + bfd_get_section_vma (output_bfd, output_section) 5035 + input_section->output_offset); 5036 5037 /* Get the correct type based on the section. If 5038 this is a constructed set, force it to be 5039 globally visible. */ 5040 if (type == N_SETT 5041 || type == N_SETD 5042 || type == N_SETB 5043 || type == N_SETA) 5044 type |= N_EXT; 5045 5046 type &=~ N_TYPE; 5047 5048 if (output_section == obj_textsec (output_bfd)) 5049 type |= (hresolve->root.type == bfd_link_hash_defined 5050 ? N_TEXT 5051 : N_WEAKT); 5052 else if (output_section == obj_datasec (output_bfd)) 5053 type |= (hresolve->root.type == bfd_link_hash_defined 5054 ? N_DATA 5055 : N_WEAKD); 5056 else if (output_section == obj_bsssec (output_bfd)) 5057 type |= (hresolve->root.type == bfd_link_hash_defined 5058 ? N_BSS 5059 : N_WEAKB); 5060 else 5061 type |= (hresolve->root.type == bfd_link_hash_defined 5062 ? N_ABS 5063 : N_WEAKA); 5064 } 5065 else if (hresolve->root.type == bfd_link_hash_common) 5066 val = hresolve->root.u.c.size; 5067 else if (hresolve->root.type == bfd_link_hash_undefweak) 5068 { 5069 val = 0; 5070 type = N_WEAKU; 5071 } 5072 else 5073 val = 0; 5074 } 5075 if (symsec != NULL) 5076 val = (symsec->output_section->vma 5077 + symsec->output_offset 5078 + (GET_WORD (input_bfd, sym->e_value) 5079 - symsec->vma)); 5080 5081 /* If this is a global symbol set the written flag, and if 5082 it is a local symbol see if we should discard it. */ 5083 if (h != NULL) 5084 { 5085 h->written = TRUE; 5086 h->indx = obj_aout_external_sym_count (output_bfd); 5087 } 5088 else if ((type & N_TYPE) != N_SETT 5089 && (type & N_TYPE) != N_SETD 5090 && (type & N_TYPE) != N_SETB 5091 && (type & N_TYPE) != N_SETA) 5092 { 5093 switch (discard) 5094 { 5095 case discard_none: 5096 case discard_sec_merge: 5097 break; 5098 case discard_l: 5099 if ((type & N_STAB) == 0 5100 && bfd_is_local_label_name (input_bfd, name)) 5101 skip = TRUE; 5102 break; 5103 case discard_all: 5104 skip = TRUE; 5105 break; 5106 } 5107 if (skip) 5108 { 5109 pass = FALSE; 5110 continue; 5111 } 5112 } 5113 5114 /* An N_BINCL symbol indicates the start of the stabs 5115 entries for a header file. We need to scan ahead to the 5116 next N_EINCL symbol, ignoring nesting, adding up all the 5117 characters in the symbol names, not including the file 5118 numbers in types (the first number after an open 5119 parenthesis). */ 5120 if (type == (int) N_BINCL) 5121 { 5122 struct external_nlist *incl_sym; 5123 int nest; 5124 struct aout_link_includes_entry *incl_entry; 5125 struct aout_link_includes_totals *t; 5126 5127 val = 0; 5128 nest = 0; 5129 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 5130 { 5131 int incl_type; 5132 5133 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5134 if (incl_type == (int) N_EINCL) 5135 { 5136 if (nest == 0) 5137 break; 5138 --nest; 5139 } 5140 else if (incl_type == (int) N_BINCL) 5141 ++nest; 5142 else if (nest == 0) 5143 { 5144 const char *s; 5145 5146 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 5147 for (; *s != '\0'; s++) 5148 { 5149 val += *s; 5150 if (*s == '(') 5151 { 5152 /* Skip the file number. */ 5153 ++s; 5154 while (ISDIGIT (*s)) 5155 ++s; 5156 --s; 5157 } 5158 } 5159 } 5160 } 5161 5162 /* If we have already included a header file with the 5163 same value, then replace this one with an N_EXCL 5164 symbol. */ 5165 copy = (bfd_boolean) (! flaginfo->info->keep_memory); 5166 incl_entry = aout_link_includes_lookup (&flaginfo->includes, 5167 name, TRUE, copy); 5168 if (incl_entry == NULL) 5169 return FALSE; 5170 for (t = incl_entry->totals; t != NULL; t = t->next) 5171 if (t->total == val) 5172 break; 5173 if (t == NULL) 5174 { 5175 /* This is the first time we have seen this header 5176 file with this set of stabs strings. */ 5177 t = (struct aout_link_includes_totals *) 5178 bfd_hash_allocate (&flaginfo->includes.root, 5179 sizeof *t); 5180 if (t == NULL) 5181 return FALSE; 5182 t->total = val; 5183 t->next = incl_entry->totals; 5184 incl_entry->totals = t; 5185 } 5186 else 5187 { 5188 int *incl_map; 5189 5190 /* This is a duplicate header file. We must change 5191 it to be an N_EXCL entry, and mark all the 5192 included symbols to prevent outputting them. */ 5193 type = (int) N_EXCL; 5194 5195 nest = 0; 5196 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 5197 incl_sym < sym_end; 5198 incl_sym++, incl_map++) 5199 { 5200 int incl_type; 5201 5202 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5203 if (incl_type == (int) N_EINCL) 5204 { 5205 if (nest == 0) 5206 { 5207 *incl_map = -1; 5208 break; 5209 } 5210 --nest; 5211 } 5212 else if (incl_type == (int) N_BINCL) 5213 ++nest; 5214 else if (nest == 0) 5215 *incl_map = -1; 5216 } 5217 } 5218 } 5219 } 5220 5221 /* Copy this symbol into the list of symbols we are going to 5222 write out. */ 5223 H_PUT_8 (output_bfd, type, outsym->e_type); 5224 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 5225 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 5226 copy = FALSE; 5227 if (! flaginfo->info->keep_memory) 5228 { 5229 /* name points into a string table which we are going to 5230 free. If there is a hash table entry, use that string. 5231 Otherwise, copy name into memory. */ 5232 if (h != NULL) 5233 name = h->root.root.string; 5234 else 5235 copy = TRUE; 5236 } 5237 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 5238 name, copy); 5239 if (strtab_index == (bfd_size_type) -1) 5240 return FALSE; 5241 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 5242 PUT_WORD (output_bfd, val, outsym->e_value); 5243 *symbol_map = obj_aout_external_sym_count (output_bfd); 5244 ++obj_aout_external_sym_count (output_bfd); 5245 ++outsym; 5246 } 5247 5248 /* Write out the output symbols we have just constructed. */ 5249 if (outsym > flaginfo->output_syms) 5250 { 5251 bfd_size_type outsym_size; 5252 5253 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0) 5254 return FALSE; 5255 outsym_size = outsym - flaginfo->output_syms; 5256 outsym_size *= EXTERNAL_NLIST_SIZE; 5257 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd) 5258 != outsym_size) 5259 return FALSE; 5260 flaginfo->symoff += outsym_size; 5261 } 5262 5263 return TRUE; 5264 } 5265 5266 /* Link an a.out input BFD into the output file. */ 5267 5268 static bfd_boolean 5269 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd) 5270 { 5271 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 5272 5273 /* If this is a dynamic object, it may need special handling. */ 5274 if ((input_bfd->flags & DYNAMIC) != 0 5275 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 5276 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 5277 (flaginfo->info, input_bfd)); 5278 5279 /* Get the symbols. We probably have them already, unless 5280 flaginfo->info->keep_memory is FALSE. */ 5281 if (! aout_get_external_symbols (input_bfd)) 5282 return FALSE; 5283 5284 /* Write out the symbols and get a map of the new indices. The map 5285 is placed into flaginfo->symbol_map. */ 5286 if (! aout_link_write_symbols (flaginfo, input_bfd)) 5287 return FALSE; 5288 5289 /* Relocate and write out the sections. These functions use the 5290 symbol map created by aout_link_write_symbols. The linker_mark 5291 field will be set if these sections are to be included in the 5292 link, which will normally be the case. */ 5293 if (obj_textsec (input_bfd)->linker_mark) 5294 { 5295 if (! aout_link_input_section (flaginfo, input_bfd, 5296 obj_textsec (input_bfd), 5297 &flaginfo->treloff, 5298 exec_hdr (input_bfd)->a_trsize)) 5299 return FALSE; 5300 } 5301 if (obj_datasec (input_bfd)->linker_mark) 5302 { 5303 if (! aout_link_input_section (flaginfo, input_bfd, 5304 obj_datasec (input_bfd), 5305 &flaginfo->dreloff, 5306 exec_hdr (input_bfd)->a_drsize)) 5307 return FALSE; 5308 } 5309 5310 /* If we are not keeping memory, we don't need the symbols any 5311 longer. We still need them if we are keeping memory, because the 5312 strings in the hash table point into them. */ 5313 if (! flaginfo->info->keep_memory) 5314 { 5315 if (! aout_link_free_symbols (input_bfd)) 5316 return FALSE; 5317 } 5318 5319 return TRUE; 5320 } 5321 5322 /* Do the final link step. This is called on the output BFD. The 5323 INFO structure should point to a list of BFDs linked through the 5324 link.next field which can be used to find each BFD which takes part 5325 in the output. Also, each section in ABFD should point to a list 5326 of bfd_link_order structures which list all the input sections for 5327 the output section. */ 5328 5329 bfd_boolean 5330 NAME (aout, final_link) (bfd *abfd, 5331 struct bfd_link_info *info, 5332 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) 5333 { 5334 struct aout_final_link_info aout_info; 5335 bfd_boolean includes_hash_initialized = FALSE; 5336 bfd *sub; 5337 bfd_size_type trsize, drsize; 5338 bfd_size_type max_contents_size; 5339 bfd_size_type max_relocs_size; 5340 bfd_size_type max_sym_count; 5341 bfd_size_type text_size; 5342 file_ptr text_end; 5343 struct bfd_link_order *p; 5344 asection *o; 5345 bfd_boolean have_link_order_relocs; 5346 5347 if (info->shared) 5348 abfd->flags |= DYNAMIC; 5349 5350 aout_info.info = info; 5351 aout_info.output_bfd = abfd; 5352 aout_info.contents = NULL; 5353 aout_info.relocs = NULL; 5354 aout_info.symbol_map = NULL; 5355 aout_info.output_syms = NULL; 5356 5357 if (!bfd_hash_table_init_n (&aout_info.includes.root, 5358 aout_link_includes_newfunc, 5359 sizeof (struct aout_link_includes_entry), 5360 251)) 5361 goto error_return; 5362 includes_hash_initialized = TRUE; 5363 5364 /* Figure out the largest section size. Also, if generating 5365 relocatable output, count the relocs. */ 5366 trsize = 0; 5367 drsize = 0; 5368 max_contents_size = 0; 5369 max_relocs_size = 0; 5370 max_sym_count = 0; 5371 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5372 { 5373 bfd_size_type sz; 5374 5375 if (info->relocatable) 5376 { 5377 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5378 { 5379 trsize += exec_hdr (sub)->a_trsize; 5380 drsize += exec_hdr (sub)->a_drsize; 5381 } 5382 else 5383 { 5384 /* FIXME: We need to identify the .text and .data sections 5385 and call get_reloc_upper_bound and canonicalize_reloc to 5386 work out the number of relocs needed, and then multiply 5387 by the reloc size. */ 5388 (*_bfd_error_handler) 5389 (_("%s: relocatable link from %s to %s not supported"), 5390 bfd_get_filename (abfd), 5391 sub->xvec->name, abfd->xvec->name); 5392 bfd_set_error (bfd_error_invalid_operation); 5393 goto error_return; 5394 } 5395 } 5396 5397 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5398 { 5399 sz = obj_textsec (sub)->size; 5400 if (sz > max_contents_size) 5401 max_contents_size = sz; 5402 sz = obj_datasec (sub)->size; 5403 if (sz > max_contents_size) 5404 max_contents_size = sz; 5405 5406 sz = exec_hdr (sub)->a_trsize; 5407 if (sz > max_relocs_size) 5408 max_relocs_size = sz; 5409 sz = exec_hdr (sub)->a_drsize; 5410 if (sz > max_relocs_size) 5411 max_relocs_size = sz; 5412 5413 sz = obj_aout_external_sym_count (sub); 5414 if (sz > max_sym_count) 5415 max_sym_count = sz; 5416 } 5417 } 5418 5419 if (info->relocatable) 5420 { 5421 if (obj_textsec (abfd) != NULL) 5422 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 5423 ->map_head.link_order) 5424 * obj_reloc_entry_size (abfd)); 5425 if (obj_datasec (abfd) != NULL) 5426 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 5427 ->map_head.link_order) 5428 * obj_reloc_entry_size (abfd)); 5429 } 5430 5431 exec_hdr (abfd)->a_trsize = trsize; 5432 exec_hdr (abfd)->a_drsize = drsize; 5433 5434 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 5435 5436 /* Adjust the section sizes and vmas according to the magic number. 5437 This sets a_text, a_data and a_bss in the exec_hdr and sets the 5438 filepos for each section. */ 5439 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 5440 goto error_return; 5441 5442 /* The relocation and symbol file positions differ among a.out 5443 targets. We are passed a callback routine from the backend 5444 specific code to handle this. 5445 FIXME: At this point we do not know how much space the symbol 5446 table will require. This will not work for any (nonstandard) 5447 a.out target that needs to know the symbol table size before it 5448 can compute the relocation file positions. This may or may not 5449 be the case for the hp300hpux target, for example. */ 5450 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 5451 &aout_info.symoff); 5452 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 5453 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 5454 obj_sym_filepos (abfd) = aout_info.symoff; 5455 5456 /* We keep a count of the symbols as we output them. */ 5457 obj_aout_external_sym_count (abfd) = 0; 5458 5459 /* We accumulate the string table as we write out the symbols. */ 5460 aout_info.strtab = _bfd_stringtab_init (); 5461 if (aout_info.strtab == NULL) 5462 goto error_return; 5463 5464 /* Allocate buffers to hold section contents and relocs. */ 5465 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); 5466 aout_info.relocs = bfd_malloc (max_relocs_size); 5467 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int)); 5468 aout_info.output_syms = (struct external_nlist *) 5469 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist)); 5470 if ((aout_info.contents == NULL && max_contents_size != 0) 5471 || (aout_info.relocs == NULL && max_relocs_size != 0) 5472 || (aout_info.symbol_map == NULL && max_sym_count != 0) 5473 || aout_info.output_syms == NULL) 5474 goto error_return; 5475 5476 /* If we have a symbol named __DYNAMIC, force it out now. This is 5477 required by SunOS. Doing this here rather than in sunos.c is a 5478 hack, but it's easier than exporting everything which would be 5479 needed. */ 5480 { 5481 struct aout_link_hash_entry *h; 5482 5483 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 5484 FALSE, FALSE, FALSE); 5485 if (h != NULL) 5486 aout_link_write_other_symbol (&h->root.root, &aout_info); 5487 } 5488 5489 /* The most time efficient way to do the link would be to read all 5490 the input object files into memory and then sort out the 5491 information into the output file. Unfortunately, that will 5492 probably use too much memory. Another method would be to step 5493 through everything that composes the text section and write it 5494 out, and then everything that composes the data section and write 5495 it out, and then write out the relocs, and then write out the 5496 symbols. Unfortunately, that requires reading stuff from each 5497 input file several times, and we will not be able to keep all the 5498 input files open simultaneously, and reopening them will be slow. 5499 5500 What we do is basically process one input file at a time. We do 5501 everything we need to do with an input file once--copy over the 5502 section contents, handle the relocation information, and write 5503 out the symbols--and then we throw away the information we read 5504 from it. This approach requires a lot of lseeks of the output 5505 file, which is unfortunate but still faster than reopening a lot 5506 of files. 5507 5508 We use the output_has_begun field of the input BFDs to see 5509 whether we have already handled it. */ 5510 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5511 sub->output_has_begun = FALSE; 5512 5513 /* Mark all sections which are to be included in the link. This 5514 will normally be every section. We need to do this so that we 5515 can identify any sections which the linker has decided to not 5516 include. */ 5517 for (o = abfd->sections; o != NULL; o = o->next) 5518 { 5519 for (p = o->map_head.link_order; p != NULL; p = p->next) 5520 if (p->type == bfd_indirect_link_order) 5521 p->u.indirect.section->linker_mark = TRUE; 5522 } 5523 5524 have_link_order_relocs = FALSE; 5525 for (o = abfd->sections; o != NULL; o = o->next) 5526 { 5527 for (p = o->map_head.link_order; 5528 p != NULL; 5529 p = p->next) 5530 { 5531 if (p->type == bfd_indirect_link_order 5532 && (bfd_get_flavour (p->u.indirect.section->owner) 5533 == bfd_target_aout_flavour)) 5534 { 5535 bfd *input_bfd; 5536 5537 input_bfd = p->u.indirect.section->owner; 5538 if (! input_bfd->output_has_begun) 5539 { 5540 if (! aout_link_input_bfd (&aout_info, input_bfd)) 5541 goto error_return; 5542 input_bfd->output_has_begun = TRUE; 5543 } 5544 } 5545 else if (p->type == bfd_section_reloc_link_order 5546 || p->type == bfd_symbol_reloc_link_order) 5547 { 5548 /* These are handled below. */ 5549 have_link_order_relocs = TRUE; 5550 } 5551 else 5552 { 5553 if (! _bfd_default_link_order (abfd, info, o, p)) 5554 goto error_return; 5555 } 5556 } 5557 } 5558 5559 /* Write out any symbols that we have not already written out. */ 5560 bfd_hash_traverse (&info->hash->table, 5561 aout_link_write_other_symbol, 5562 &aout_info); 5563 5564 /* Now handle any relocs we were asked to create by the linker. 5565 These did not come from any input file. We must do these after 5566 we have written out all the symbols, so that we know the symbol 5567 indices to use. */ 5568 if (have_link_order_relocs) 5569 { 5570 for (o = abfd->sections; o != NULL; o = o->next) 5571 { 5572 for (p = o->map_head.link_order; 5573 p != NULL; 5574 p = p->next) 5575 { 5576 if (p->type == bfd_section_reloc_link_order 5577 || p->type == bfd_symbol_reloc_link_order) 5578 { 5579 if (! aout_link_reloc_link_order (&aout_info, o, p)) 5580 goto error_return; 5581 } 5582 } 5583 } 5584 } 5585 5586 if (aout_info.contents != NULL) 5587 { 5588 free (aout_info.contents); 5589 aout_info.contents = NULL; 5590 } 5591 if (aout_info.relocs != NULL) 5592 { 5593 free (aout_info.relocs); 5594 aout_info.relocs = NULL; 5595 } 5596 if (aout_info.symbol_map != NULL) 5597 { 5598 free (aout_info.symbol_map); 5599 aout_info.symbol_map = NULL; 5600 } 5601 if (aout_info.output_syms != NULL) 5602 { 5603 free (aout_info.output_syms); 5604 aout_info.output_syms = NULL; 5605 } 5606 if (includes_hash_initialized) 5607 { 5608 bfd_hash_table_free (&aout_info.includes.root); 5609 includes_hash_initialized = FALSE; 5610 } 5611 5612 /* Finish up any dynamic linking we may be doing. */ 5613 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 5614 { 5615 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 5616 goto error_return; 5617 } 5618 5619 /* Update the header information. */ 5620 abfd->symcount = obj_aout_external_sym_count (abfd); 5621 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 5622 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 5623 obj_textsec (abfd)->reloc_count = 5624 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 5625 obj_datasec (abfd)->reloc_count = 5626 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 5627 5628 /* Write out the string table, unless there are no symbols. */ 5629 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0) 5630 goto error_return; 5631 if (abfd->symcount > 0) 5632 { 5633 if (!emit_stringtab (abfd, aout_info.strtab)) 5634 goto error_return; 5635 } 5636 else 5637 { 5638 bfd_byte b[BYTES_IN_WORD]; 5639 5640 memset (b, 0, BYTES_IN_WORD); 5641 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD) 5642 goto error_return; 5643 } 5644 5645 return TRUE; 5646 5647 error_return: 5648 if (aout_info.contents != NULL) 5649 free (aout_info.contents); 5650 if (aout_info.relocs != NULL) 5651 free (aout_info.relocs); 5652 if (aout_info.symbol_map != NULL) 5653 free (aout_info.symbol_map); 5654 if (aout_info.output_syms != NULL) 5655 free (aout_info.output_syms); 5656 if (includes_hash_initialized) 5657 bfd_hash_table_free (&aout_info.includes.root); 5658 return FALSE; 5659 } 5660
