1/* BFD semi-generic back-end for a.out binaries. 2 Copyright (C) 1990-2017 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/* 23SECTION 24 a.out backends 25 26DESCRIPTION 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/* 132SUBSECTION 133 Relocations 134 135DESCRIPTION 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 179reloc_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, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 207 HOWTO (0, 0, 3, 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 214reloc_howto_type howto_table_std[] = 215{ 216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 217HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), 218HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 219HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), 220HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE), 221HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), 222HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 223HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), 224HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE), 225HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE), 226HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE), 227HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE), 228EMPTY_HOWTO (-1), 229EMPTY_HOWTO (-1), 230EMPTY_HOWTO (-1), 231EMPTY_HOWTO (-1), 232EMPTY_HOWTO (-1), 233 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE), 234EMPTY_HOWTO (-1), 235EMPTY_HOWTO (-1), 236EMPTY_HOWTO (-1), 237EMPTY_HOWTO (-1), 238EMPTY_HOWTO (-1), 239EMPTY_HOWTO (-1), 240EMPTY_HOWTO (-1), 241EMPTY_HOWTO (-1), 242EMPTY_HOWTO (-1), 243EMPTY_HOWTO (-1), 244EMPTY_HOWTO (-1), 245EMPTY_HOWTO (-1), 246EMPTY_HOWTO (-1), 247EMPTY_HOWTO (-1), 248EMPTY_HOWTO (-1), 249 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE), 250EMPTY_HOWTO (-1), 251EMPTY_HOWTO (-1), 252EMPTY_HOWTO (-1), 253EMPTY_HOWTO (-1), 254EMPTY_HOWTO (-1), 255EMPTY_HOWTO (-1), 256EMPTY_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 262reloc_howto_type * 263NAME (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 319reloc_howto_type * 320NAME (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/* 345SUBSECTION 346 Internal entry points 347 348DESCRIPTION 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/* 355FUNCTION 356 aout_@var{size}_swap_exec_header_in 357 358SYNOPSIS 359 void aout_@var{size}_swap_exec_header_in, 360 (bfd *abfd, 361 struct external_exec *bytes, 362 struct internal_exec *execp); 363 364DESCRIPTION 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 371void 372NAME (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/* 395FUNCTION 396 aout_@var{size}_swap_exec_header_out 397 398SYNOPSIS 399 void aout_@var{size}_swap_exec_header_out 400 (bfd *abfd, 401 struct internal_exec *execp, 402 struct external_exec *raw_bytes); 403 404DESCRIPTION 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*/ 408void 409NAME (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 426bfd_boolean 427NAME (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/* 439FUNCTION 440 aout_@var{size}_some_aout_object_p 441 442SYNOPSIS 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 448DESCRIPTION 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 456const bfd_target * 457NAME (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/* 664FUNCTION 665 aout_@var{size}_mkobject 666 667SYNOPSIS 668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd); 669 670DESCRIPTION 671 Initialize BFD @var{abfd} for use with a.out files. 672*/ 673 674bfd_boolean 675NAME (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/* 697FUNCTION 698 aout_@var{size}_machine_type 699 700SYNOPSIS 701 enum machine_type aout_@var{size}_machine_type 702 (enum bfd_architecture arch, 703 unsigned long machine, 704 bfd_boolean *unknown); 705 706DESCRIPTION 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 716enum machine_type 717NAME (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_v8plusc 737 || machine == bfd_mach_sparc_v8plusd 738 || machine == bfd_mach_sparc_v8pluse 739 || machine == bfd_mach_sparc_v8plusv 740 || machine == bfd_mach_sparc_v8plusm 741 || machine == bfd_mach_sparc_v9 742 || machine == bfd_mach_sparc_v9a 743 || machine == bfd_mach_sparc_v9b 744 || machine == bfd_mach_sparc_v9c 745 || machine == bfd_mach_sparc_v9d 746 || machine == bfd_mach_sparc_v9e 747 || machine == bfd_mach_sparc_v9v 748 || machine == bfd_mach_sparc_v9m) 749 arch_flags = M_SPARC; 750 else if (machine == bfd_mach_sparc_sparclet) 751 arch_flags = M_SPARCLET; 752 break; 753 754 case bfd_arch_m68k: 755 switch (machine) 756 { 757 case 0: arch_flags = M_68010; break; 758 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break; 759 case bfd_mach_m68010: arch_flags = M_68010; break; 760 case bfd_mach_m68020: arch_flags = M_68020; break; 761 default: arch_flags = M_UNKNOWN; break; 762 } 763 break; 764 765 case bfd_arch_i386: 766 if (machine == 0 767 || machine == bfd_mach_i386_i386 768 || machine == bfd_mach_i386_i386_intel_syntax) 769 arch_flags = M_386; 770 break; 771 772 case bfd_arch_arm: 773 if (machine == 0) 774 arch_flags = M_ARM; 775 break; 776 777 case bfd_arch_mips: 778 switch (machine) 779 { 780 case 0: 781 case bfd_mach_mips3000: 782 case bfd_mach_mips3900: 783 arch_flags = M_MIPS1; 784 break; 785 case bfd_mach_mips6000: 786 arch_flags = M_MIPS2; 787 break; 788 case bfd_mach_mips4000: 789 case bfd_mach_mips4010: 790 case bfd_mach_mips4100: 791 case bfd_mach_mips4300: 792 case bfd_mach_mips4400: 793 case bfd_mach_mips4600: 794 case bfd_mach_mips4650: 795 case bfd_mach_mips8000: 796 case bfd_mach_mips9000: 797 case bfd_mach_mips10000: 798 case bfd_mach_mips12000: 799 case bfd_mach_mips14000: 800 case bfd_mach_mips16000: 801 case bfd_mach_mips16: 802 case bfd_mach_mipsisa32: 803 case bfd_mach_mipsisa32r2: 804 case bfd_mach_mipsisa32r3: 805 case bfd_mach_mipsisa32r5: 806 case bfd_mach_mipsisa32r6: 807 case bfd_mach_mips5: 808 case bfd_mach_mipsisa64: 809 case bfd_mach_mipsisa64r2: 810 case bfd_mach_mipsisa64r3: 811 case bfd_mach_mipsisa64r5: 812 case bfd_mach_mipsisa64r6: 813 case bfd_mach_mips_sb1: 814 case bfd_mach_mips_xlr: 815 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 816 arch_flags = M_MIPS2; 817 break; 818 default: 819 arch_flags = M_UNKNOWN; 820 break; 821 } 822 break; 823 824 case bfd_arch_ns32k: 825 switch (machine) 826 { 827 case 0: arch_flags = M_NS32532; break; 828 case 32032: arch_flags = M_NS32032; break; 829 case 32532: arch_flags = M_NS32532; break; 830 default: arch_flags = M_UNKNOWN; break; 831 } 832 break; 833 834 case bfd_arch_vax: 835 *unknown = FALSE; 836 break; 837 838 case bfd_arch_cris: 839 if (machine == 0 || machine == 255) 840 arch_flags = M_CRIS; 841 break; 842 843 case bfd_arch_m88k: 844 *unknown = FALSE; 845 break; 846 847 default: 848 arch_flags = M_UNKNOWN; 849 } 850 851 if (arch_flags != M_UNKNOWN) 852 *unknown = FALSE; 853 854 return arch_flags; 855} 856 857/* 858FUNCTION 859 aout_@var{size}_set_arch_mach 860 861SYNOPSIS 862 bfd_boolean aout_@var{size}_set_arch_mach, 863 (bfd *, 864 enum bfd_architecture arch, 865 unsigned long machine); 866 867DESCRIPTION 868 Set the architecture and the machine of the BFD @var{abfd} to the 869 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 870 can support the architecture required. 871*/ 872 873bfd_boolean 874NAME (aout, set_arch_mach) (bfd *abfd, 875 enum bfd_architecture arch, 876 unsigned long machine) 877{ 878 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 879 return FALSE; 880 881 if (arch != bfd_arch_unknown) 882 { 883 bfd_boolean unknown; 884 885 NAME (aout, machine_type) (arch, machine, &unknown); 886 if (unknown) 887 return FALSE; 888 } 889 890 /* Determine the size of a relocation entry. */ 891 switch (arch) 892 { 893 case bfd_arch_sparc: 894 case bfd_arch_mips: 895 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 896 break; 897 default: 898 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 899 break; 900 } 901 902 return (*aout_backend_info (abfd)->set_sizes) (abfd); 903} 904 905static void 906adjust_o_magic (bfd *abfd, struct internal_exec *execp) 907{ 908 file_ptr pos = adata (abfd).exec_bytes_size; 909 bfd_vma vma = 0; 910 int pad = 0; 911 912 /* Text. */ 913 obj_textsec (abfd)->filepos = pos; 914 if (!obj_textsec (abfd)->user_set_vma) 915 obj_textsec (abfd)->vma = vma; 916 else 917 vma = obj_textsec (abfd)->vma; 918 919 pos += obj_textsec (abfd)->size; 920 vma += obj_textsec (abfd)->size; 921 922 /* Data. */ 923 if (!obj_datasec (abfd)->user_set_vma) 924 { 925 obj_textsec (abfd)->size += pad; 926 pos += pad; 927 vma += pad; 928 obj_datasec (abfd)->vma = vma; 929 } 930 else 931 vma = obj_datasec (abfd)->vma; 932 obj_datasec (abfd)->filepos = pos; 933 pos += obj_datasec (abfd)->size; 934 vma += obj_datasec (abfd)->size; 935 936 /* BSS. */ 937 if (!obj_bsssec (abfd)->user_set_vma) 938 { 939 obj_datasec (abfd)->size += pad; 940 pos += pad; 941 vma += pad; 942 obj_bsssec (abfd)->vma = vma; 943 } 944 else 945 { 946 /* The VMA of the .bss section is set by the VMA of the 947 .data section plus the size of the .data section. We may 948 need to add padding bytes to make this true. */ 949 pad = obj_bsssec (abfd)->vma - vma; 950 if (pad > 0) 951 { 952 obj_datasec (abfd)->size += pad; 953 pos += pad; 954 } 955 } 956 obj_bsssec (abfd)->filepos = pos; 957 958 /* Fix up the exec header. */ 959 execp->a_text = obj_textsec (abfd)->size; 960 execp->a_data = obj_datasec (abfd)->size; 961 execp->a_bss = obj_bsssec (abfd)->size; 962 N_SET_MAGIC (execp, OMAGIC); 963} 964 965static void 966adjust_z_magic (bfd *abfd, struct internal_exec *execp) 967{ 968 bfd_size_type data_pad, text_pad; 969 file_ptr text_end; 970 const struct aout_backend_data *abdp; 971 /* TRUE if text includes exec header. */ 972 bfd_boolean ztih; 973 974 abdp = aout_backend_info (abfd); 975 976 /* Text. */ 977 ztih = (abdp != NULL 978 && (abdp->text_includes_header 979 || obj_aout_subformat (abfd) == q_magic_format)); 980 obj_textsec (abfd)->filepos = (ztih 981 ? adata (abfd).exec_bytes_size 982 : adata (abfd).zmagic_disk_block_size); 983 if (! obj_textsec (abfd)->user_set_vma) 984 { 985 /* ?? Do we really need to check for relocs here? */ 986 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 987 ? 0 988 : (ztih 989 ? (abdp->default_text_vma 990 + adata (abfd).exec_bytes_size) 991 : abdp->default_text_vma)); 992 text_pad = 0; 993 } 994 else 995 { 996 /* The .text section is being loaded at an unusual address. We 997 may need to pad it such that the .data section starts at a page 998 boundary. */ 999 if (ztih) 1000 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 1001 & (adata (abfd).page_size - 1)); 1002 else 1003 text_pad = ((- obj_textsec (abfd)->vma) 1004 & (adata (abfd).page_size - 1)); 1005 } 1006 1007 /* Find start of data. */ 1008 if (ztih) 1009 { 1010 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; 1011 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1012 } 1013 else 1014 { 1015 /* Note that if page_size == zmagic_disk_block_size, then 1016 filepos == page_size, and this case is the same as the ztih 1017 case. */ 1018 text_end = obj_textsec (abfd)->size; 1019 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1020 text_end += obj_textsec (abfd)->filepos; 1021 } 1022 obj_textsec (abfd)->size += text_pad; 1023 text_end += text_pad; 1024 1025 /* Data. */ 1026 if (!obj_datasec (abfd)->user_set_vma) 1027 { 1028 bfd_vma vma; 1029 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size; 1030 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1031 } 1032 if (abdp && abdp->zmagic_mapped_contiguous) 1033 { 1034 asection * text = obj_textsec (abfd); 1035 asection * data = obj_datasec (abfd); 1036 1037 text_pad = data->vma - (text->vma + text->size); 1038 /* Only pad the text section if the data 1039 section is going to be placed after it. */ 1040 if (text_pad > 0) 1041 text->size += text_pad; 1042 } 1043 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1044 + obj_textsec (abfd)->size); 1045 1046 /* Fix up exec header while we're at it. */ 1047 execp->a_text = obj_textsec (abfd)->size; 1048 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1049 execp->a_text += adata (abfd).exec_bytes_size; 1050 if (obj_aout_subformat (abfd) == q_magic_format) 1051 N_SET_MAGIC (execp, QMAGIC); 1052 else 1053 N_SET_MAGIC (execp, ZMAGIC); 1054 1055 /* Spec says data section should be rounded up to page boundary. */ 1056 obj_datasec (abfd)->size 1057 = align_power (obj_datasec (abfd)->size, 1058 obj_bsssec (abfd)->alignment_power); 1059 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size, 1060 adata (abfd).page_size); 1061 data_pad = execp->a_data - obj_datasec (abfd)->size; 1062 1063 /* BSS. */ 1064 if (!obj_bsssec (abfd)->user_set_vma) 1065 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1066 + obj_datasec (abfd)->size); 1067 /* If the BSS immediately follows the data section and extra space 1068 in the page is left after the data section, fudge data 1069 in the header so that the bss section looks smaller by that 1070 amount. We'll start the bss section there, and lie to the OS. 1071 (Note that a linker script, as well as the above assignment, 1072 could have explicitly set the BSS vma to immediately follow 1073 the data section.) */ 1074 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1075 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size) 1076 execp->a_bss = (data_pad > obj_bsssec (abfd)->size 1077 ? 0 : obj_bsssec (abfd)->size - data_pad); 1078 else 1079 execp->a_bss = obj_bsssec (abfd)->size; 1080} 1081 1082static void 1083adjust_n_magic (bfd *abfd, struct internal_exec *execp) 1084{ 1085 file_ptr pos = adata (abfd).exec_bytes_size; 1086 bfd_vma vma = 0; 1087 int pad; 1088 1089 /* Text. */ 1090 obj_textsec (abfd)->filepos = pos; 1091 if (!obj_textsec (abfd)->user_set_vma) 1092 obj_textsec (abfd)->vma = vma; 1093 else 1094 vma = obj_textsec (abfd)->vma; 1095 pos += obj_textsec (abfd)->size; 1096 vma += obj_textsec (abfd)->size; 1097 1098 /* Data. */ 1099 obj_datasec (abfd)->filepos = pos; 1100 if (!obj_datasec (abfd)->user_set_vma) 1101 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1102 vma = obj_datasec (abfd)->vma; 1103 1104 /* Since BSS follows data immediately, see if it needs alignment. */ 1105 vma += obj_datasec (abfd)->size; 1106 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1107 obj_datasec (abfd)->size += pad; 1108 pos += obj_datasec (abfd)->size; 1109 1110 /* BSS. */ 1111 if (!obj_bsssec (abfd)->user_set_vma) 1112 obj_bsssec (abfd)->vma = vma; 1113 else 1114 vma = obj_bsssec (abfd)->vma; 1115 1116 /* Fix up exec header. */ 1117 execp->a_text = obj_textsec (abfd)->size; 1118 execp->a_data = obj_datasec (abfd)->size; 1119 execp->a_bss = obj_bsssec (abfd)->size; 1120 N_SET_MAGIC (execp, NMAGIC); 1121} 1122 1123bfd_boolean 1124NAME (aout, adjust_sizes_and_vmas) (bfd *abfd) 1125{ 1126 struct internal_exec *execp = exec_hdr (abfd); 1127 1128 if (! NAME (aout, make_sections) (abfd)) 1129 return FALSE; 1130 1131 if (adata (abfd).magic != undecided_magic) 1132 return TRUE; 1133 1134 obj_textsec (abfd)->size = 1135 align_power (obj_textsec (abfd)->size, 1136 obj_textsec (abfd)->alignment_power); 1137 1138 /* Rule (heuristic) for when to pad to a new page. Note that there 1139 are (at least) two ways demand-paged (ZMAGIC) files have been 1140 handled. Most Berkeley-based systems start the text segment at 1141 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1142 segment right after the exec header; the latter is counted in the 1143 text segment size, and is paged in by the kernel with the rest of 1144 the text. */ 1145 1146 /* This perhaps isn't the right way to do this, but made it simpler for me 1147 to understand enough to implement it. Better would probably be to go 1148 right from BFD flags to alignment/positioning characteristics. But the 1149 old code was sloppy enough about handling the flags, and had enough 1150 other magic, that it was a little hard for me to understand. I think 1151 I understand it better now, but I haven't time to do the cleanup this 1152 minute. */ 1153 1154 if (abfd->flags & D_PAGED) 1155 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1156 adata (abfd).magic = z_magic; 1157 else if (abfd->flags & WP_TEXT) 1158 adata (abfd).magic = n_magic; 1159 else 1160 adata (abfd).magic = o_magic; 1161 1162#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1163#if __GNUC__ >= 2 1164 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1165 ({ char *str; 1166 switch (adata (abfd).magic) 1167 { 1168 case n_magic: str = "NMAGIC"; break; 1169 case o_magic: str = "OMAGIC"; break; 1170 case z_magic: str = "ZMAGIC"; break; 1171 default: abort (); 1172 } 1173 str; 1174 }), 1175 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1176 obj_textsec (abfd)->alignment_power, 1177 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1178 obj_datasec (abfd)->alignment_power, 1179 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size, 1180 obj_bsssec (abfd)->alignment_power); 1181#endif 1182#endif 1183 1184 switch (adata (abfd).magic) 1185 { 1186 case o_magic: 1187 adjust_o_magic (abfd, execp); 1188 break; 1189 case z_magic: 1190 adjust_z_magic (abfd, execp); 1191 break; 1192 case n_magic: 1193 adjust_n_magic (abfd, execp); 1194 break; 1195 default: 1196 abort (); 1197 } 1198 1199#ifdef BFD_AOUT_DEBUG 1200 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1201 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1202 obj_textsec (abfd)->filepos, 1203 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1204 obj_datasec (abfd)->filepos, 1205 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size); 1206#endif 1207 1208 return TRUE; 1209} 1210 1211/* 1212FUNCTION 1213 aout_@var{size}_new_section_hook 1214 1215SYNOPSIS 1216 bfd_boolean aout_@var{size}_new_section_hook, 1217 (bfd *abfd, 1218 asection *newsect); 1219 1220DESCRIPTION 1221 Called by the BFD in response to a @code{bfd_make_section} 1222 request. 1223*/ 1224bfd_boolean 1225NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) 1226{ 1227 /* Align to double at least. */ 1228 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power; 1229 1230 if (bfd_get_format (abfd) == bfd_object) 1231 { 1232 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text")) 1233 { 1234 obj_textsec (abfd)= newsect; 1235 newsect->target_index = N_TEXT; 1236 } 1237 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data")) 1238 { 1239 obj_datasec (abfd) = newsect; 1240 newsect->target_index = N_DATA; 1241 } 1242 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss")) 1243 { 1244 obj_bsssec (abfd) = newsect; 1245 newsect->target_index = N_BSS; 1246 } 1247 } 1248 1249 /* We allow more than three sections internally. */ 1250 return _bfd_generic_new_section_hook (abfd, newsect); 1251} 1252 1253bfd_boolean 1254NAME (aout, set_section_contents) (bfd *abfd, 1255 sec_ptr section, 1256 const void * location, 1257 file_ptr offset, 1258 bfd_size_type count) 1259{ 1260 if (! abfd->output_has_begun) 1261 { 1262 if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) 1263 return FALSE; 1264 } 1265 1266 if (section == obj_bsssec (abfd)) 1267 { 1268 bfd_set_error (bfd_error_no_contents); 1269 return FALSE; 1270 } 1271 1272 if (section != obj_textsec (abfd) 1273 && section != obj_datasec (abfd)) 1274 { 1275 if (aout_section_merge_with_text_p (abfd, section)) 1276 section->filepos = obj_textsec (abfd)->filepos + 1277 (section->vma - obj_textsec (abfd)->vma); 1278 else 1279 { 1280 _bfd_error_handler 1281 /* xgettext:c-format */ 1282 (_("%s: can not represent section `%s' in a.out object file format"), 1283 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1284 bfd_set_error (bfd_error_nonrepresentable_section); 1285 return FALSE; 1286 } 1287 } 1288 1289 if (count != 0) 1290 { 1291 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1292 || bfd_bwrite (location, count, abfd) != count) 1293 return FALSE; 1294 } 1295 1296 return TRUE; 1297} 1298 1299/* Read the external symbols from an a.out file. */ 1300 1301static bfd_boolean 1302aout_get_external_symbols (bfd *abfd) 1303{ 1304 if (obj_aout_external_syms (abfd) == NULL) 1305 { 1306 bfd_size_type count; 1307 struct external_nlist *syms; 1308 bfd_size_type amt = exec_hdr (abfd)->a_syms; 1309 1310 count = amt / EXTERNAL_NLIST_SIZE; 1311 if (count == 0) 1312 return TRUE; /* Nothing to do. */ 1313 1314#ifdef USE_MMAP 1315 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), amt, 1316 &obj_aout_sym_window (abfd), TRUE)) 1317 return FALSE; 1318 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1319#else 1320 /* We allocate using malloc to make the values easy to free 1321 later on. If we put them on the objalloc it might not be 1322 possible to free them. */ 1323 syms = (struct external_nlist *) bfd_malloc (amt); 1324 if (syms == NULL) 1325 return FALSE; 1326 1327 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1328 || bfd_bread (syms, amt, abfd) != amt) 1329 { 1330 free (syms); 1331 return FALSE; 1332 } 1333#endif 1334 1335 obj_aout_external_syms (abfd) = syms; 1336 obj_aout_external_sym_count (abfd) = count; 1337 } 1338 1339 if (obj_aout_external_strings (abfd) == NULL 1340 && exec_hdr (abfd)->a_syms != 0) 1341 { 1342 unsigned char string_chars[BYTES_IN_WORD]; 1343 bfd_size_type stringsize; 1344 char *strings; 1345 bfd_size_type amt = BYTES_IN_WORD; 1346 1347 /* Get the size of the strings. */ 1348 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1349 || bfd_bread ((void *) string_chars, amt, abfd) != amt) 1350 return FALSE; 1351 stringsize = GET_WORD (abfd, string_chars); 1352 1353#ifdef USE_MMAP 1354 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1355 &obj_aout_string_window (abfd), TRUE)) 1356 return FALSE; 1357 strings = (char *) obj_aout_string_window (abfd).data; 1358#else 1359 strings = (char *) bfd_malloc (stringsize + 1); 1360 if (strings == NULL) 1361 return FALSE; 1362 1363 /* Skip space for the string count in the buffer for convenience 1364 when using indexes. */ 1365 amt = stringsize - BYTES_IN_WORD; 1366 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1367 { 1368 free (strings); 1369 return FALSE; 1370 } 1371#endif 1372 1373 /* Ensure that a zero index yields an empty string. */ 1374 strings[0] = '\0'; 1375 1376 strings[stringsize - 1] = 0; 1377 1378 obj_aout_external_strings (abfd) = strings; 1379 obj_aout_external_string_size (abfd) = stringsize; 1380 } 1381 1382 return TRUE; 1383} 1384 1385/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1386 and symbol->value fields of CACHE_PTR will be set from the a.out 1387 nlist structure. This function is responsible for setting 1388 symbol->flags and symbol->section, and adjusting symbol->value. */ 1389 1390static bfd_boolean 1391translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr) 1392{ 1393 flagword visible; 1394 1395 if ((cache_ptr->type & N_STAB) != 0 1396 || cache_ptr->type == N_FN) 1397 { 1398 asection *sec; 1399 1400 /* This is a debugging symbol. */ 1401 cache_ptr->symbol.flags = BSF_DEBUGGING; 1402 1403 /* Work out the symbol section. */ 1404 switch (cache_ptr->type & N_TYPE) 1405 { 1406 case N_TEXT: 1407 case N_FN: 1408 sec = obj_textsec (abfd); 1409 break; 1410 case N_DATA: 1411 sec = obj_datasec (abfd); 1412 break; 1413 case N_BSS: 1414 sec = obj_bsssec (abfd); 1415 break; 1416 default: 1417 case N_ABS: 1418 sec = bfd_abs_section_ptr; 1419 break; 1420 } 1421 1422 cache_ptr->symbol.section = sec; 1423 cache_ptr->symbol.value -= sec->vma; 1424 1425 return TRUE; 1426 } 1427 1428 /* Get the default visibility. This does not apply to all types, so 1429 we just hold it in a local variable to use if wanted. */ 1430 if ((cache_ptr->type & N_EXT) == 0) 1431 visible = BSF_LOCAL; 1432 else 1433 visible = BSF_GLOBAL; 1434 1435 switch (cache_ptr->type) 1436 { 1437 default: 1438 case N_ABS: case N_ABS | N_EXT: 1439 cache_ptr->symbol.section = bfd_abs_section_ptr; 1440 cache_ptr->symbol.flags = visible; 1441 break; 1442 1443 case N_UNDF | N_EXT: 1444 if (cache_ptr->symbol.value != 0) 1445 { 1446 /* This is a common symbol. */ 1447 cache_ptr->symbol.flags = BSF_GLOBAL; 1448 cache_ptr->symbol.section = bfd_com_section_ptr; 1449 } 1450 else 1451 { 1452 cache_ptr->symbol.flags = 0; 1453 cache_ptr->symbol.section = bfd_und_section_ptr; 1454 } 1455 break; 1456 1457 case N_TEXT: case N_TEXT | N_EXT: 1458 cache_ptr->symbol.section = obj_textsec (abfd); 1459 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1460 cache_ptr->symbol.flags = visible; 1461 break; 1462 1463 /* N_SETV symbols used to represent set vectors placed in the 1464 data section. They are no longer generated. Theoretically, 1465 it was possible to extract the entries and combine them with 1466 new ones, although I don't know if that was ever actually 1467 done. Unless that feature is restored, treat them as data 1468 symbols. */ 1469 case N_SETV: case N_SETV | N_EXT: 1470 case N_DATA: case N_DATA | N_EXT: 1471 cache_ptr->symbol.section = obj_datasec (abfd); 1472 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1473 cache_ptr->symbol.flags = visible; 1474 break; 1475 1476 case N_BSS: case N_BSS | N_EXT: 1477 cache_ptr->symbol.section = obj_bsssec (abfd); 1478 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1479 cache_ptr->symbol.flags = visible; 1480 break; 1481 1482 case N_SETA: case N_SETA | N_EXT: 1483 case N_SETT: case N_SETT | N_EXT: 1484 case N_SETD: case N_SETD | N_EXT: 1485 case N_SETB: case N_SETB | N_EXT: 1486 { 1487 /* This code is no longer needed. It used to be used to make 1488 the linker handle set symbols, but they are now handled in 1489 the add_symbols routine instead. */ 1490 switch (cache_ptr->type & N_TYPE) 1491 { 1492 case N_SETA: 1493 cache_ptr->symbol.section = bfd_abs_section_ptr; 1494 break; 1495 case N_SETT: 1496 cache_ptr->symbol.section = obj_textsec (abfd); 1497 break; 1498 case N_SETD: 1499 cache_ptr->symbol.section = obj_datasec (abfd); 1500 break; 1501 case N_SETB: 1502 cache_ptr->symbol.section = obj_bsssec (abfd); 1503 break; 1504 } 1505 1506 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1507 } 1508 break; 1509 1510 case N_WARNING: 1511 /* This symbol is the text of a warning message. The next 1512 symbol is the symbol to associate the warning with. If a 1513 reference is made to that symbol, a warning is issued. */ 1514 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1515 cache_ptr->symbol.section = bfd_abs_section_ptr; 1516 break; 1517 1518 case N_INDR: case N_INDR | N_EXT: 1519 /* An indirect symbol. This consists of two symbols in a row. 1520 The first symbol is the name of the indirection. The second 1521 symbol is the name of the target. A reference to the first 1522 symbol becomes a reference to the second. */ 1523 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1524 cache_ptr->symbol.section = bfd_ind_section_ptr; 1525 break; 1526 1527 case N_WEAKU: 1528 cache_ptr->symbol.section = bfd_und_section_ptr; 1529 cache_ptr->symbol.flags = BSF_WEAK; 1530 break; 1531 1532 case N_WEAKA: 1533 cache_ptr->symbol.section = bfd_abs_section_ptr; 1534 cache_ptr->symbol.flags = BSF_WEAK; 1535 break; 1536 1537 case N_WEAKT: 1538 cache_ptr->symbol.section = obj_textsec (abfd); 1539 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1540 cache_ptr->symbol.flags = BSF_WEAK; 1541 break; 1542 1543 case N_WEAKD: 1544 cache_ptr->symbol.section = obj_datasec (abfd); 1545 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1546 cache_ptr->symbol.flags = BSF_WEAK; 1547 break; 1548 1549 case N_WEAKB: 1550 cache_ptr->symbol.section = obj_bsssec (abfd); 1551 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1552 cache_ptr->symbol.flags = BSF_WEAK; 1553 break; 1554 } 1555 1556 return TRUE; 1557} 1558 1559/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1560 1561static bfd_boolean 1562translate_to_native_sym_flags (bfd *abfd, 1563 asymbol *cache_ptr, 1564 struct external_nlist *sym_pointer) 1565{ 1566 bfd_vma value = cache_ptr->value; 1567 asection *sec; 1568 bfd_vma off; 1569 1570 /* Mask out any existing type bits in case copying from one section 1571 to another. */ 1572 sym_pointer->e_type[0] &= ~N_TYPE; 1573 1574 sec = bfd_get_section (cache_ptr); 1575 off = 0; 1576 1577 if (sec == NULL) 1578 { 1579 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1580 file. */ 1581 _bfd_error_handler 1582 /* xgettext:c-format */ 1583 (_("%s: can not represent section for symbol `%s' in a.out " 1584 "object file format"), 1585 bfd_get_filename (abfd), 1586 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1587 bfd_set_error (bfd_error_nonrepresentable_section); 1588 return FALSE; 1589 } 1590 1591 if (sec->output_section != NULL) 1592 { 1593 off = sec->output_offset; 1594 sec = sec->output_section; 1595 } 1596 1597 if (bfd_is_abs_section (sec)) 1598 sym_pointer->e_type[0] |= N_ABS; 1599 else if (sec == obj_textsec (abfd)) 1600 sym_pointer->e_type[0] |= N_TEXT; 1601 else if (sec == obj_datasec (abfd)) 1602 sym_pointer->e_type[0] |= N_DATA; 1603 else if (sec == obj_bsssec (abfd)) 1604 sym_pointer->e_type[0] |= N_BSS; 1605 else if (bfd_is_und_section (sec)) 1606 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1607 else if (bfd_is_ind_section (sec)) 1608 sym_pointer->e_type[0] = N_INDR; 1609 else if (bfd_is_com_section (sec)) 1610 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1611 else 1612 { 1613 if (aout_section_merge_with_text_p (abfd, sec)) 1614 sym_pointer->e_type[0] |= N_TEXT; 1615 else 1616 { 1617 _bfd_error_handler 1618 /* xgettext:c-format */ 1619 (_("%s: can not represent section `%s' in a.out object file format"), 1620 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1621 bfd_set_error (bfd_error_nonrepresentable_section); 1622 return FALSE; 1623 } 1624 } 1625 1626 /* Turn the symbol from section relative to absolute again. */ 1627 value += sec->vma + off; 1628 1629 if ((cache_ptr->flags & BSF_WARNING) != 0) 1630 sym_pointer->e_type[0] = N_WARNING; 1631 1632 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1633 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1634 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1635 sym_pointer->e_type[0] |= N_EXT; 1636 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1637 sym_pointer->e_type[0] &= ~N_EXT; 1638 1639 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1640 { 1641 int type = ((aout_symbol_type *) cache_ptr)->type; 1642 1643 switch (type) 1644 { 1645 case N_ABS: type = N_SETA; break; 1646 case N_TEXT: type = N_SETT; break; 1647 case N_DATA: type = N_SETD; break; 1648 case N_BSS: type = N_SETB; break; 1649 } 1650 sym_pointer->e_type[0] = type; 1651 } 1652 1653 if ((cache_ptr->flags & BSF_WEAK) != 0) 1654 { 1655 int type; 1656 1657 switch (sym_pointer->e_type[0] & N_TYPE) 1658 { 1659 default: 1660 case N_ABS: type = N_WEAKA; break; 1661 case N_TEXT: type = N_WEAKT; break; 1662 case N_DATA: type = N_WEAKD; break; 1663 case N_BSS: type = N_WEAKB; break; 1664 case N_UNDF: type = N_WEAKU; break; 1665 } 1666 sym_pointer->e_type[0] = type; 1667 } 1668 1669 PUT_WORD (abfd, value, sym_pointer->e_value); 1670 1671 return TRUE; 1672} 1673 1674/* Native-level interface to symbols. */ 1675 1676asymbol * 1677NAME (aout, make_empty_symbol) (bfd *abfd) 1678{ 1679 bfd_size_type amt = sizeof (aout_symbol_type); 1680 1681 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt); 1682 if (!new_symbol) 1683 return NULL; 1684 new_symbol->symbol.the_bfd = abfd; 1685 1686 return &new_symbol->symbol; 1687} 1688 1689/* Translate a set of internal symbols into external symbols. */ 1690 1691bfd_boolean 1692NAME (aout, translate_symbol_table) (bfd *abfd, 1693 aout_symbol_type *in, 1694 struct external_nlist *ext, 1695 bfd_size_type count, 1696 char *str, 1697 bfd_size_type strsize, 1698 bfd_boolean dynamic) 1699{ 1700 struct external_nlist *ext_end; 1701 1702 ext_end = ext + count; 1703 for (; ext < ext_end; ext++, in++) 1704 { 1705 bfd_vma x; 1706 1707 x = GET_WORD (abfd, ext->e_strx); 1708 in->symbol.the_bfd = abfd; 1709 1710 /* For the normal symbols, the zero index points at the number 1711 of bytes in the string table but is to be interpreted as the 1712 null string. For the dynamic symbols, the number of bytes in 1713 the string table is stored in the __DYNAMIC structure and the 1714 zero index points at an actual string. */ 1715 if (x == 0 && ! dynamic) 1716 in->symbol.name = ""; 1717 else if (x < strsize) 1718 in->symbol.name = str + x; 1719 else 1720 return FALSE; 1721 1722 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1723 in->desc = H_GET_16 (abfd, ext->e_desc); 1724 in->other = H_GET_8 (abfd, ext->e_other); 1725 in->type = H_GET_8 (abfd, ext->e_type); 1726 in->symbol.udata.p = NULL; 1727 1728 if (! translate_from_native_sym_flags (abfd, in)) 1729 return FALSE; 1730 1731 if (dynamic) 1732 in->symbol.flags |= BSF_DYNAMIC; 1733 } 1734 1735 return TRUE; 1736} 1737 1738/* We read the symbols into a buffer, which is discarded when this 1739 function exits. We read the strings into a buffer large enough to 1740 hold them all plus all the cached symbol entries. */ 1741 1742bfd_boolean 1743NAME (aout, slurp_symbol_table) (bfd *abfd) 1744{ 1745 struct external_nlist *old_external_syms; 1746 aout_symbol_type *cached; 1747 bfd_size_type cached_size; 1748 1749 /* If there's no work to be done, don't do any. */ 1750 if (obj_aout_symbols (abfd) != NULL) 1751 return TRUE; 1752 1753 old_external_syms = obj_aout_external_syms (abfd); 1754 1755 if (! aout_get_external_symbols (abfd)) 1756 return FALSE; 1757 1758 cached_size = obj_aout_external_sym_count (abfd); 1759 if (cached_size == 0) 1760 return TRUE; /* Nothing to do. */ 1761 1762 cached_size *= sizeof (aout_symbol_type); 1763 cached = (aout_symbol_type *) bfd_zmalloc (cached_size); 1764 if (cached == NULL) 1765 return FALSE; 1766 1767 /* Convert from external symbol information to internal. */ 1768 if (! (NAME (aout, translate_symbol_table) 1769 (abfd, cached, 1770 obj_aout_external_syms (abfd), 1771 obj_aout_external_sym_count (abfd), 1772 obj_aout_external_strings (abfd), 1773 obj_aout_external_string_size (abfd), 1774 FALSE))) 1775 { 1776 free (cached); 1777 return FALSE; 1778 } 1779 1780 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1781 1782 obj_aout_symbols (abfd) = cached; 1783 1784 /* It is very likely that anybody who calls this function will not 1785 want the external symbol information, so if it was allocated 1786 because of our call to aout_get_external_symbols, we free it up 1787 right away to save space. */ 1788 if (old_external_syms == NULL 1789 && obj_aout_external_syms (abfd) != NULL) 1790 { 1791#ifdef USE_MMAP 1792 bfd_free_window (&obj_aout_sym_window (abfd)); 1793#else 1794 free (obj_aout_external_syms (abfd)); 1795#endif 1796 obj_aout_external_syms (abfd) = NULL; 1797 } 1798 1799 return TRUE; 1800} 1801 1802/* We use a hash table when writing out symbols so that we only write 1803 out a particular string once. This helps particularly when the 1804 linker writes out stabs debugging entries, because each different 1805 contributing object file tends to have many duplicate stabs 1806 strings. 1807 1808 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1809 if BFD_TRADITIONAL_FORMAT is set. */ 1810 1811/* Get the index of a string in a strtab, adding it if it is not 1812 already present. */ 1813 1814static inline bfd_size_type 1815add_to_stringtab (bfd *abfd, 1816 struct bfd_strtab_hash *tab, 1817 const char *str, 1818 bfd_boolean copy) 1819{ 1820 bfd_boolean hash; 1821 bfd_size_type str_index; 1822 1823 /* An index of 0 always means the empty string. */ 1824 if (str == 0 || *str == '\0') 1825 return 0; 1826 1827 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1828 doesn't understand a hashed string table. */ 1829 hash = TRUE; 1830 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1831 hash = FALSE; 1832 1833 str_index = _bfd_stringtab_add (tab, str, hash, copy); 1834 1835 if (str_index != (bfd_size_type) -1) 1836 /* Add BYTES_IN_WORD to the return value to account for the 1837 space taken up by the string table size. */ 1838 str_index += BYTES_IN_WORD; 1839 1840 return str_index; 1841} 1842 1843/* Write out a strtab. ABFD is already at the right location in the 1844 file. */ 1845 1846static bfd_boolean 1847emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) 1848{ 1849 bfd_byte buffer[BYTES_IN_WORD]; 1850 bfd_size_type amt = BYTES_IN_WORD; 1851 1852 /* The string table starts with the size. */ 1853 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1854 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt) 1855 return FALSE; 1856 1857 return _bfd_stringtab_emit (abfd, tab); 1858} 1859 1860bfd_boolean 1861NAME (aout, write_syms) (bfd *abfd) 1862{ 1863 unsigned int count ; 1864 asymbol **generic = bfd_get_outsymbols (abfd); 1865 struct bfd_strtab_hash *strtab; 1866 1867 strtab = _bfd_stringtab_init (); 1868 if (strtab == NULL) 1869 return FALSE; 1870 1871 for (count = 0; count < bfd_get_symcount (abfd); count++) 1872 { 1873 asymbol *g = generic[count]; 1874 bfd_size_type indx; 1875 struct external_nlist nsp; 1876 bfd_size_type amt; 1877 1878 indx = add_to_stringtab (abfd, strtab, g->name, FALSE); 1879 if (indx == (bfd_size_type) -1) 1880 goto error_return; 1881 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1882 1883 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1884 { 1885 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1886 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1887 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1888 } 1889 else 1890 { 1891 H_PUT_16 (abfd, 0, nsp.e_desc); 1892 H_PUT_8 (abfd, 0, nsp.e_other); 1893 H_PUT_8 (abfd, 0, nsp.e_type); 1894 } 1895 1896 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1897 goto error_return; 1898 1899 amt = EXTERNAL_NLIST_SIZE; 1900 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt) 1901 goto error_return; 1902 1903 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1904 here, at the end. */ 1905 g->KEEPIT = count; 1906 } 1907 1908 if (! emit_stringtab (abfd, strtab)) 1909 goto error_return; 1910 1911 _bfd_stringtab_free (strtab); 1912 1913 return TRUE; 1914 1915error_return: 1916 _bfd_stringtab_free (strtab); 1917 return FALSE; 1918} 1919 1920long 1921NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) 1922{ 1923 unsigned int counter = 0; 1924 aout_symbol_type *symbase; 1925 1926 if (!NAME (aout, slurp_symbol_table) (abfd)) 1927 return -1; 1928 1929 for (symbase = obj_aout_symbols (abfd); 1930 counter++ < bfd_get_symcount (abfd); 1931 ) 1932 *(location++) = (asymbol *) (symbase++); 1933 *location++ =0; 1934 return bfd_get_symcount (abfd); 1935} 1936 1937/* Standard reloc stuff. */ 1938/* Output standard relocation information to a file in target byte order. */ 1939 1940extern void NAME (aout, swap_std_reloc_out) 1941 (bfd *, arelent *, struct reloc_std_external *); 1942 1943void 1944NAME (aout, swap_std_reloc_out) (bfd *abfd, 1945 arelent *g, 1946 struct reloc_std_external *natptr) 1947{ 1948 int r_index; 1949 asymbol *sym = *(g->sym_ptr_ptr); 1950 int r_extern; 1951 unsigned int r_length; 1952 int r_pcrel; 1953 int r_baserel, r_jmptable, r_relative; 1954 asection *output_section = sym->section->output_section; 1955 1956 PUT_WORD (abfd, g->address, natptr->r_address); 1957 1958 BFD_ASSERT (g->howto != NULL); 1959 r_length = g->howto->size ; /* Size as a power of two. */ 1960 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 1961 /* XXX This relies on relocs coming from a.out files. */ 1962 r_baserel = (g->howto->type & 8) != 0; 1963 r_jmptable = (g->howto->type & 16) != 0; 1964 r_relative = (g->howto->type & 32) != 0; 1965 1966 /* Name was clobbered by aout_write_syms to be symbol index. */ 1967 1968 /* If this relocation is relative to a symbol then set the 1969 r_index to the symbols index, and the r_extern bit. 1970 1971 Absolute symbols can come in in two ways, either as an offset 1972 from the abs section, or as a symbol which has an abs value. 1973 check for that here. */ 1974 1975 if (bfd_is_com_section (output_section) 1976 || bfd_is_abs_section (output_section) 1977 || bfd_is_und_section (output_section) 1978 /* PR gas/3041 a.out relocs against weak symbols 1979 must be treated as if they were against externs. */ 1980 || (sym->flags & BSF_WEAK)) 1981 { 1982 if (bfd_abs_section_ptr->symbol == sym) 1983 { 1984 /* Whoops, looked like an abs symbol, but is 1985 really an offset from the abs section. */ 1986 r_index = N_ABS; 1987 r_extern = 0; 1988 } 1989 else 1990 { 1991 /* Fill in symbol. */ 1992 r_extern = 1; 1993 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 1994 } 1995 } 1996 else 1997 { 1998 /* Just an ordinary section. */ 1999 r_extern = 0; 2000 r_index = output_section->target_index; 2001 } 2002 2003 /* Now the fun stuff. */ 2004 if (bfd_header_big_endian (abfd)) 2005 { 2006 natptr->r_index[0] = r_index >> 16; 2007 natptr->r_index[1] = r_index >> 8; 2008 natptr->r_index[2] = r_index; 2009 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 2010 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 2011 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 2012 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 2013 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 2014 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 2015 } 2016 else 2017 { 2018 natptr->r_index[2] = r_index >> 16; 2019 natptr->r_index[1] = r_index >> 8; 2020 natptr->r_index[0] = r_index; 2021 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2022 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2023 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2024 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2025 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2026 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2027 } 2028} 2029 2030/* Extended stuff. */ 2031/* Output extended relocation information to a file in target byte order. */ 2032 2033extern void NAME (aout, swap_ext_reloc_out) 2034 (bfd *, arelent *, struct reloc_ext_external *); 2035 2036void 2037NAME (aout, swap_ext_reloc_out) (bfd *abfd, 2038 arelent *g, 2039 struct reloc_ext_external *natptr) 2040{ 2041 int r_index; 2042 int r_extern; 2043 unsigned int r_type; 2044 bfd_vma r_addend; 2045 asymbol *sym = *(g->sym_ptr_ptr); 2046 asection *output_section = sym->section->output_section; 2047 2048 PUT_WORD (abfd, g->address, natptr->r_address); 2049 2050 r_type = (unsigned int) g->howto->type; 2051 2052 r_addend = g->addend; 2053 if ((sym->flags & BSF_SECTION_SYM) != 0) 2054 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2055 2056 /* If this relocation is relative to a symbol then set the 2057 r_index to the symbols index, and the r_extern bit. 2058 2059 Absolute symbols can come in in two ways, either as an offset 2060 from the abs section, or as a symbol which has an abs value. 2061 check for that here. */ 2062 if (bfd_is_abs_section (bfd_get_section (sym))) 2063 { 2064 r_extern = 0; 2065 r_index = N_ABS; 2066 } 2067 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2068 { 2069 if (bfd_is_und_section (bfd_get_section (sym)) 2070 || (sym->flags & BSF_GLOBAL) != 0) 2071 r_extern = 1; 2072 else 2073 r_extern = 0; 2074 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2075 } 2076 else 2077 { 2078 /* Just an ordinary section. */ 2079 r_extern = 0; 2080 r_index = output_section->target_index; 2081 } 2082 2083 /* Now the fun stuff. */ 2084 if (bfd_header_big_endian (abfd)) 2085 { 2086 natptr->r_index[0] = r_index >> 16; 2087 natptr->r_index[1] = r_index >> 8; 2088 natptr->r_index[2] = r_index; 2089 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2090 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2091 } 2092 else 2093 { 2094 natptr->r_index[2] = r_index >> 16; 2095 natptr->r_index[1] = r_index >> 8; 2096 natptr->r_index[0] = r_index; 2097 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2098 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2099 } 2100 2101 PUT_WORD (abfd, r_addend, natptr->r_addend); 2102} 2103 2104/* BFD deals internally with all things based from the section they're 2105 in. so, something in 10 bytes into a text section with a base of 2106 50 would have a symbol (.text+10) and know .text vma was 50. 2107 2108 Aout keeps all it's symbols based from zero, so the symbol would 2109 contain 60. This macro subs the base of each section from the value 2110 to give the true offset from the section. */ 2111 2112#define MOVE_ADDRESS(ad) \ 2113 if (r_extern) \ 2114 { \ 2115 /* Undefined symbol. */ \ 2116 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2117 cache_ptr->addend = ad; \ 2118 } \ 2119 else \ 2120 { \ 2121 /* Defined, section relative. Replace symbol with pointer to \ 2122 symbol which points to section. */ \ 2123 switch (r_index) \ 2124 { \ 2125 case N_TEXT: \ 2126 case N_TEXT | N_EXT: \ 2127 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2128 cache_ptr->addend = ad - su->textsec->vma; \ 2129 break; \ 2130 case N_DATA: \ 2131 case N_DATA | N_EXT: \ 2132 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2133 cache_ptr->addend = ad - su->datasec->vma; \ 2134 break; \ 2135 case N_BSS: \ 2136 case N_BSS | N_EXT: \ 2137 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2138 cache_ptr->addend = ad - su->bsssec->vma; \ 2139 break; \ 2140 default: \ 2141 case N_ABS: \ 2142 case N_ABS | N_EXT: \ 2143 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2144 cache_ptr->addend = ad; \ 2145 break; \ 2146 } \ 2147 } 2148 2149void 2150NAME (aout, swap_ext_reloc_in) (bfd *abfd, 2151 struct reloc_ext_external *bytes, 2152 arelent *cache_ptr, 2153 asymbol **symbols, 2154 bfd_size_type symcount) 2155{ 2156 unsigned int r_index; 2157 int r_extern; 2158 unsigned int r_type; 2159 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2160 2161 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2162 2163 /* Now the fun stuff. */ 2164 if (bfd_header_big_endian (abfd)) 2165 { 2166 r_index = (((unsigned int) bytes->r_index[0] << 16) 2167 | ((unsigned int) bytes->r_index[1] << 8) 2168 | bytes->r_index[2]); 2169 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2170 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2171 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2172 } 2173 else 2174 { 2175 r_index = (((unsigned int) bytes->r_index[2] << 16) 2176 | ((unsigned int) bytes->r_index[1] << 8) 2177 | bytes->r_index[0]); 2178 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2179 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2180 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2181 } 2182 2183 if (r_type < TABLE_SIZE (howto_table_ext)) 2184 cache_ptr->howto = howto_table_ext + r_type; 2185 else 2186 cache_ptr->howto = NULL; 2187 2188 /* Base relative relocs are always against the symbol table, 2189 regardless of the setting of r_extern. r_extern just reflects 2190 whether the symbol the reloc is against is local or global. */ 2191 if (r_type == (unsigned int) RELOC_BASE10 2192 || r_type == (unsigned int) RELOC_BASE13 2193 || r_type == (unsigned int) RELOC_BASE22) 2194 r_extern = 1; 2195 2196 if (r_extern && r_index > symcount) 2197 { 2198 /* We could arrange to return an error, but it might be useful 2199 to see the file even if it is bad. */ 2200 r_extern = 0; 2201 r_index = N_ABS; 2202 } 2203 2204 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2205} 2206 2207void 2208NAME (aout, swap_std_reloc_in) (bfd *abfd, 2209 struct reloc_std_external *bytes, 2210 arelent *cache_ptr, 2211 asymbol **symbols, 2212 bfd_size_type symcount) 2213{ 2214 unsigned int r_index; 2215 int r_extern; 2216 unsigned int r_length; 2217 int r_pcrel; 2218 int r_baserel, r_jmptable, r_relative; 2219 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2220 unsigned int howto_idx; 2221 2222 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2223 2224 /* Now the fun stuff. */ 2225 if (bfd_header_big_endian (abfd)) 2226 { 2227 r_index = (((unsigned int) bytes->r_index[0] << 16) 2228 | ((unsigned int) bytes->r_index[1] << 8) 2229 | bytes->r_index[2]); 2230 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2231 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2232 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2233 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2234 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2235 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2236 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2237 } 2238 else 2239 { 2240 r_index = (((unsigned int) bytes->r_index[2] << 16) 2241 | ((unsigned int) bytes->r_index[1] << 8) 2242 | bytes->r_index[0]); 2243 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2244 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2245 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2246 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2247 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2248 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2249 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2250 } 2251 2252 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2253 + 16 * r_jmptable + 32 * r_relative); 2254 if (howto_idx < TABLE_SIZE (howto_table_std)) 2255 { 2256 cache_ptr->howto = howto_table_std + howto_idx; 2257 if (cache_ptr->howto->type == (unsigned int) -1) 2258 cache_ptr->howto = NULL; 2259 } 2260 else 2261 cache_ptr->howto = NULL; 2262 2263 /* Base relative relocs are always against the symbol table, 2264 regardless of the setting of r_extern. r_extern just reflects 2265 whether the symbol the reloc is against is local or global. */ 2266 if (r_baserel) 2267 r_extern = 1; 2268 2269 if (r_extern && r_index > symcount) 2270 { 2271 /* We could arrange to return an error, but it might be useful 2272 to see the file even if it is bad. */ 2273 r_extern = 0; 2274 r_index = N_ABS; 2275 } 2276 2277 MOVE_ADDRESS (0); 2278} 2279 2280/* Read and swap the relocs for a section. */ 2281 2282bfd_boolean 2283NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) 2284{ 2285 bfd_size_type count; 2286 bfd_size_type reloc_size; 2287 void * relocs; 2288 arelent *reloc_cache; 2289 size_t each_size; 2290 unsigned int counter = 0; 2291 arelent *cache_ptr; 2292 bfd_size_type amt; 2293 2294 if (asect->relocation) 2295 return TRUE; 2296 2297 if (asect->flags & SEC_CONSTRUCTOR) 2298 return TRUE; 2299 2300 if (asect == obj_datasec (abfd)) 2301 reloc_size = exec_hdr (abfd)->a_drsize; 2302 else if (asect == obj_textsec (abfd)) 2303 reloc_size = exec_hdr (abfd)->a_trsize; 2304 else if (asect == obj_bsssec (abfd)) 2305 reloc_size = 0; 2306 else 2307 { 2308 bfd_set_error (bfd_error_invalid_operation); 2309 return FALSE; 2310 } 2311 2312 if (reloc_size == 0) 2313 return TRUE; /* Nothing to be done. */ 2314 2315 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2316 return FALSE; 2317 2318 each_size = obj_reloc_entry_size (abfd); 2319 2320 count = reloc_size / each_size; 2321 if (count == 0) 2322 return TRUE; /* Nothing to be done. */ 2323 2324 amt = count * sizeof (arelent); 2325 reloc_cache = (arelent *) bfd_zmalloc (amt); 2326 if (reloc_cache == NULL) 2327 return FALSE; 2328 2329 relocs = bfd_malloc (reloc_size); 2330 if (relocs == NULL) 2331 { 2332 free (reloc_cache); 2333 return FALSE; 2334 } 2335 2336 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2337 { 2338 free (relocs); 2339 free (reloc_cache); 2340 return FALSE; 2341 } 2342 2343 cache_ptr = reloc_cache; 2344 if (each_size == RELOC_EXT_SIZE) 2345 { 2346 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2347 2348 for (; counter < count; counter++, rptr++, cache_ptr++) 2349 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2350 (bfd_size_type) bfd_get_symcount (abfd)); 2351 } 2352 else 2353 { 2354 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2355 2356 for (; counter < count; counter++, rptr++, cache_ptr++) 2357 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2358 (bfd_size_type) bfd_get_symcount (abfd)); 2359 } 2360 2361 free (relocs); 2362 2363 asect->relocation = reloc_cache; 2364 asect->reloc_count = cache_ptr - reloc_cache; 2365 2366 return TRUE; 2367} 2368 2369/* Write out a relocation section into an object file. */ 2370 2371bfd_boolean 2372NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) 2373{ 2374 arelent **generic; 2375 unsigned char *native, *natptr; 2376 size_t each_size; 2377 2378 unsigned int count = section->reloc_count; 2379 bfd_size_type natsize; 2380 2381 if (count == 0 || section->orelocation == NULL) 2382 return TRUE; 2383 2384 each_size = obj_reloc_entry_size (abfd); 2385 natsize = (bfd_size_type) each_size * count; 2386 native = (unsigned char *) bfd_zalloc (abfd, natsize); 2387 if (!native) 2388 return FALSE; 2389 2390 generic = section->orelocation; 2391 2392 if (each_size == RELOC_EXT_SIZE) 2393 { 2394 for (natptr = native; 2395 count != 0; 2396 --count, natptr += each_size, ++generic) 2397 { 2398 /* PR 20921: If the howto field has not been initialised then skip 2399 this reloc. 2400 PR 20929: Similarly for the symbol field. */ 2401 if ((*generic)->howto == NULL 2402 || (*generic)->sym_ptr_ptr == NULL) 2403 { 2404 bfd_set_error (bfd_error_invalid_operation); 2405 _bfd_error_handler (_("\ 2406%B: attempt to write out unknown reloc type"), abfd); 2407 return FALSE; 2408 } 2409 MY_swap_ext_reloc_out (abfd, *generic, 2410 (struct reloc_ext_external *) natptr); 2411 } 2412 } 2413 else 2414 { 2415 for (natptr = native; 2416 count != 0; 2417 --count, natptr += each_size, ++generic) 2418 { 2419 if ((*generic)->howto == NULL 2420 || (*generic)->sym_ptr_ptr == NULL) 2421 { 2422 bfd_set_error (bfd_error_invalid_operation); 2423 _bfd_error_handler (_("\ 2424%B: attempt to write out unknown reloc type"), abfd); 2425 return FALSE; 2426 } 2427 MY_swap_std_reloc_out (abfd, *generic, 2428 (struct reloc_std_external *) natptr); 2429 } 2430 } 2431 2432 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) 2433 { 2434 bfd_release (abfd, native); 2435 return FALSE; 2436 } 2437 bfd_release (abfd, native); 2438 2439 return TRUE; 2440} 2441 2442/* This is stupid. This function should be a boolean predicate. */ 2443 2444long 2445NAME (aout, canonicalize_reloc) (bfd *abfd, 2446 sec_ptr section, 2447 arelent **relptr, 2448 asymbol **symbols) 2449{ 2450 arelent *tblptr = section->relocation; 2451 unsigned int count; 2452 2453 if (section == obj_bsssec (abfd)) 2454 { 2455 *relptr = NULL; 2456 return 0; 2457 } 2458 2459 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols))) 2460 return -1; 2461 2462 if (section->flags & SEC_CONSTRUCTOR) 2463 { 2464 arelent_chain *chain = section->constructor_chain; 2465 for (count = 0; count < section->reloc_count; count ++) 2466 { 2467 *relptr ++ = &chain->relent; 2468 chain = chain->next; 2469 } 2470 } 2471 else 2472 { 2473 tblptr = section->relocation; 2474 2475 for (count = 0; count++ < section->reloc_count; ) 2476 { 2477 *relptr++ = tblptr++; 2478 } 2479 } 2480 *relptr = 0; 2481 2482 return section->reloc_count; 2483} 2484 2485long 2486NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) 2487{ 2488 if (bfd_get_format (abfd) != bfd_object) 2489 { 2490 bfd_set_error (bfd_error_invalid_operation); 2491 return -1; 2492 } 2493 2494 if (asect->flags & SEC_CONSTRUCTOR) 2495 return sizeof (arelent *) * (asect->reloc_count + 1); 2496 2497 if (asect == obj_datasec (abfd)) 2498 return sizeof (arelent *) 2499 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2500 + 1); 2501 2502 if (asect == obj_textsec (abfd)) 2503 return sizeof (arelent *) 2504 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2505 + 1); 2506 2507 if (asect == obj_bsssec (abfd)) 2508 return sizeof (arelent *); 2509 2510 if (asect == obj_bsssec (abfd)) 2511 return 0; 2512 2513 bfd_set_error (bfd_error_invalid_operation); 2514 return -1; 2515} 2516 2517long 2518NAME (aout, get_symtab_upper_bound) (bfd *abfd) 2519{ 2520 if (!NAME (aout, slurp_symbol_table) (abfd)) 2521 return -1; 2522 2523 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2524} 2525 2526alent * 2527NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2528 asymbol *ignore_symbol ATTRIBUTE_UNUSED) 2529{ 2530 return NULL; 2531} 2532 2533void 2534NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2535 asymbol *symbol, 2536 symbol_info *ret) 2537{ 2538 bfd_symbol_info (symbol, ret); 2539 2540 if (ret->type == '?') 2541 { 2542 int type_code = aout_symbol (symbol)->type & 0xff; 2543 const char *stab_name = bfd_get_stab_name (type_code); 2544 static char buf[10]; 2545 2546 if (stab_name == NULL) 2547 { 2548 sprintf (buf, "(%d)", type_code); 2549 stab_name = buf; 2550 } 2551 ret->type = '-'; 2552 ret->stab_type = type_code; 2553 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2554 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2555 ret->stab_name = stab_name; 2556 } 2557} 2558 2559void 2560NAME (aout, print_symbol) (bfd *abfd, 2561 void * afile, 2562 asymbol *symbol, 2563 bfd_print_symbol_type how) 2564{ 2565 FILE *file = (FILE *)afile; 2566 2567 switch (how) 2568 { 2569 case bfd_print_symbol_name: 2570 if (symbol->name) 2571 fprintf (file,"%s", symbol->name); 2572 break; 2573 case bfd_print_symbol_more: 2574 fprintf (file,"%4x %2x %2x", 2575 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2576 (unsigned) (aout_symbol (symbol)->other & 0xff), 2577 (unsigned) (aout_symbol (symbol)->type)); 2578 break; 2579 case bfd_print_symbol_all: 2580 { 2581 const char *section_name = symbol->section->name; 2582 2583 bfd_print_symbol_vandf (abfd, (void *)file, symbol); 2584 2585 fprintf (file," %-5s %04x %02x %02x", 2586 section_name, 2587 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2588 (unsigned) (aout_symbol (symbol)->other & 0xff), 2589 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2590 if (symbol->name) 2591 fprintf (file," %s", symbol->name); 2592 } 2593 break; 2594 } 2595} 2596 2597/* If we don't have to allocate more than 1MB to hold the generic 2598 symbols, we use the generic minisymbol methord: it's faster, since 2599 it only translates the symbols once, not multiple times. */ 2600#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2601 2602/* Read minisymbols. For minisymbols, we use the unmodified a.out 2603 symbols. The minisymbol_to_symbol function translates these into 2604 BFD asymbol structures. */ 2605 2606long 2607NAME (aout, read_minisymbols) (bfd *abfd, 2608 bfd_boolean dynamic, 2609 void * *minisymsp, 2610 unsigned int *sizep) 2611{ 2612 if (dynamic) 2613 /* We could handle the dynamic symbols here as well, but it's 2614 easier to hand them off. */ 2615 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2616 2617 if (! aout_get_external_symbols (abfd)) 2618 return -1; 2619 2620 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2621 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2622 2623 *minisymsp = (void *) obj_aout_external_syms (abfd); 2624 2625 /* By passing the external symbols back from this routine, we are 2626 giving up control over the memory block. Clear 2627 obj_aout_external_syms, so that we do not try to free it 2628 ourselves. */ 2629 obj_aout_external_syms (abfd) = NULL; 2630 2631 *sizep = EXTERNAL_NLIST_SIZE; 2632 return obj_aout_external_sym_count (abfd); 2633} 2634 2635/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2636 unmodified a.out symbol. The SYM argument is a structure returned 2637 by bfd_make_empty_symbol, which we fill in here. */ 2638 2639asymbol * 2640NAME (aout, minisymbol_to_symbol) (bfd *abfd, 2641 bfd_boolean dynamic, 2642 const void * minisym, 2643 asymbol *sym) 2644{ 2645 if (dynamic 2646 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2647 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2648 2649 memset (sym, 0, sizeof (aout_symbol_type)); 2650 2651 /* We call translate_symbol_table to translate a single symbol. */ 2652 if (! (NAME (aout, translate_symbol_table) 2653 (abfd, 2654 (aout_symbol_type *) sym, 2655 (struct external_nlist *) minisym, 2656 (bfd_size_type) 1, 2657 obj_aout_external_strings (abfd), 2658 obj_aout_external_string_size (abfd), 2659 FALSE))) 2660 return NULL; 2661 2662 return sym; 2663} 2664 2665/* Provided a BFD, a section and an offset into the section, calculate 2666 and return the name of the source file and the line nearest to the 2667 wanted location. */ 2668 2669bfd_boolean 2670NAME (aout, find_nearest_line) (bfd *abfd, 2671 asymbol **symbols, 2672 asection *section, 2673 bfd_vma offset, 2674 const char **filename_ptr, 2675 const char **functionname_ptr, 2676 unsigned int *line_ptr, 2677 unsigned int *disriminator_ptr) 2678{ 2679 /* Run down the file looking for the filename, function and linenumber. */ 2680 asymbol **p; 2681 const char *directory_name = NULL; 2682 const char *main_file_name = NULL; 2683 const char *current_file_name = NULL; 2684 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2685 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2686 bfd_vma low_line_vma = 0; 2687 bfd_vma low_func_vma = 0; 2688 asymbol *func = 0; 2689 bfd_size_type filelen, funclen; 2690 char *buf; 2691 2692 *filename_ptr = abfd->filename; 2693 *functionname_ptr = NULL; 2694 *line_ptr = 0; 2695 if (disriminator_ptr) 2696 *disriminator_ptr = 0; 2697 2698 if (symbols != NULL) 2699 { 2700 for (p = symbols; *p; p++) 2701 { 2702 aout_symbol_type *q = (aout_symbol_type *) (*p); 2703 next: 2704 switch (q->type) 2705 { 2706 case N_TEXT: 2707 /* If this looks like a file name symbol, and it comes after 2708 the line number we have found so far, but before the 2709 offset, then we have probably not found the right line 2710 number. */ 2711 if (q->symbol.value <= offset 2712 && ((q->symbol.value > low_line_vma 2713 && (line_file_name != NULL 2714 || *line_ptr != 0)) 2715 || (q->symbol.value > low_func_vma 2716 && func != NULL))) 2717 { 2718 const char *symname; 2719 2720 symname = q->symbol.name; 2721 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2722 { 2723 if (q->symbol.value > low_line_vma) 2724 { 2725 *line_ptr = 0; 2726 line_file_name = NULL; 2727 } 2728 if (q->symbol.value > low_func_vma) 2729 func = NULL; 2730 } 2731 } 2732 break; 2733 2734 case N_SO: 2735 /* If this symbol is less than the offset, but greater than 2736 the line number we have found so far, then we have not 2737 found the right line number. */ 2738 if (q->symbol.value <= offset) 2739 { 2740 if (q->symbol.value > low_line_vma) 2741 { 2742 *line_ptr = 0; 2743 line_file_name = NULL; 2744 } 2745 if (q->symbol.value > low_func_vma) 2746 func = NULL; 2747 } 2748 2749 main_file_name = current_file_name = q->symbol.name; 2750 /* Look ahead to next symbol to check if that too is an N_SO. */ 2751 p++; 2752 if (*p == NULL) 2753 goto done; 2754 q = (aout_symbol_type *) (*p); 2755 if (q->type != (int)N_SO) 2756 goto next; 2757 2758 /* Found a second N_SO First is directory; second is filename. */ 2759 directory_name = current_file_name; 2760 main_file_name = current_file_name = q->symbol.name; 2761 if (obj_textsec (abfd) != section) 2762 goto done; 2763 break; 2764 case N_SOL: 2765 current_file_name = q->symbol.name; 2766 break; 2767 2768 case N_SLINE: 2769 2770 case N_DSLINE: 2771 case N_BSLINE: 2772 /* We'll keep this if it resolves nearer than the one we have 2773 already. */ 2774 if (q->symbol.value >= low_line_vma 2775 && q->symbol.value <= offset) 2776 { 2777 *line_ptr = q->desc; 2778 low_line_vma = q->symbol.value; 2779 line_file_name = current_file_name; 2780 line_directory_name = directory_name; 2781 } 2782 break; 2783 case N_FUN: 2784 { 2785 /* We'll keep this if it is nearer than the one we have already. */ 2786 if (q->symbol.value >= low_func_vma && 2787 q->symbol.value <= offset) 2788 { 2789 low_func_vma = q->symbol.value; 2790 func = (asymbol *)q; 2791 } 2792 else if (q->symbol.value > offset) 2793 goto done; 2794 } 2795 break; 2796 } 2797 } 2798 } 2799 2800 done: 2801 if (*line_ptr != 0) 2802 { 2803 main_file_name = line_file_name; 2804 directory_name = line_directory_name; 2805 } 2806 2807 if (main_file_name == NULL 2808 || IS_ABSOLUTE_PATH (main_file_name) 2809 || directory_name == NULL) 2810 filelen = 0; 2811 else 2812 filelen = strlen (directory_name) + strlen (main_file_name); 2813 2814 if (func == NULL) 2815 funclen = 0; 2816 else 2817 funclen = strlen (bfd_asymbol_name (func)); 2818 2819 if (adata (abfd).line_buf != NULL) 2820 free (adata (abfd).line_buf); 2821 2822 if (filelen + funclen == 0) 2823 adata (abfd).line_buf = buf = NULL; 2824 else 2825 { 2826 buf = (char *) bfd_malloc (filelen + funclen + 3); 2827 adata (abfd).line_buf = buf; 2828 if (buf == NULL) 2829 return FALSE; 2830 } 2831 2832 if (main_file_name != NULL) 2833 { 2834 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2835 *filename_ptr = main_file_name; 2836 else 2837 { 2838 if (buf == NULL) 2839 /* PR binutils/20891: In a corrupt input file both 2840 main_file_name and directory_name can be empty... */ 2841 * filename_ptr = NULL; 2842 else 2843 { 2844 snprintf (buf, filelen + 1, "%s%s", directory_name, 2845 main_file_name); 2846 *filename_ptr = buf; 2847 buf += filelen + 1; 2848 } 2849 } 2850 } 2851 2852 if (func) 2853 { 2854 const char *function = func->name; 2855 char *colon; 2856 2857 if (buf == NULL) 2858 { 2859 /* PR binutils/20892: In a corrupt input file func can be empty. */ 2860 * functionname_ptr = NULL; 2861 return TRUE; 2862 } 2863 /* The caller expects a symbol name. We actually have a 2864 function name, without the leading underscore. Put the 2865 underscore back in, so that the caller gets a symbol name. */ 2866 if (bfd_get_symbol_leading_char (abfd) == '\0') 2867 strcpy (buf, function); 2868 else 2869 { 2870 buf[0] = bfd_get_symbol_leading_char (abfd); 2871 strcpy (buf + 1, function); 2872 } 2873 /* Have to remove : stuff. */ 2874 colon = strchr (buf, ':'); 2875 if (colon != NULL) 2876 *colon = '\0'; 2877 *functionname_ptr = buf; 2878 } 2879 2880 return TRUE; 2881} 2882 2883int 2884NAME (aout, sizeof_headers) (bfd *abfd, 2885 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2886{ 2887 return adata (abfd).exec_bytes_size; 2888} 2889 2890/* Free all information we have cached for this BFD. We can always 2891 read it again later if we need it. */ 2892 2893bfd_boolean 2894NAME (aout, bfd_free_cached_info) (bfd *abfd) 2895{ 2896 asection *o; 2897 2898 if (bfd_get_format (abfd) != bfd_object 2899 || abfd->tdata.aout_data == NULL) 2900 return TRUE; 2901 2902#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2903 BFCI_FREE (obj_aout_symbols (abfd)); 2904#ifdef USE_MMAP 2905 obj_aout_external_syms (abfd) = 0; 2906 bfd_free_window (&obj_aout_sym_window (abfd)); 2907 bfd_free_window (&obj_aout_string_window (abfd)); 2908 obj_aout_external_strings (abfd) = 0; 2909#else 2910 BFCI_FREE (obj_aout_external_syms (abfd)); 2911 BFCI_FREE (obj_aout_external_strings (abfd)); 2912#endif 2913 for (o = abfd->sections; o != NULL; o = o->next) 2914 BFCI_FREE (o->relocation); 2915#undef BFCI_FREE 2916 2917 return TRUE; 2918} 2919 2920/* a.out link code. */ 2921 2922/* Routine to create an entry in an a.out link hash table. */ 2923 2924struct bfd_hash_entry * 2925NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, 2926 struct bfd_hash_table *table, 2927 const char *string) 2928{ 2929 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2930 2931 /* Allocate the structure if it has not already been allocated by a 2932 subclass. */ 2933 if (ret == NULL) 2934 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table, 2935 sizeof (* ret)); 2936 if (ret == NULL) 2937 return NULL; 2938 2939 /* Call the allocation method of the superclass. */ 2940 ret = ((struct aout_link_hash_entry *) 2941 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2942 table, string)); 2943 if (ret) 2944 { 2945 /* Set local fields. */ 2946 ret->written = FALSE; 2947 ret->indx = -1; 2948 } 2949 2950 return (struct bfd_hash_entry *) ret; 2951} 2952 2953/* Initialize an a.out link hash table. */ 2954 2955bfd_boolean 2956NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, 2957 bfd *abfd, 2958 struct bfd_hash_entry *(*newfunc) 2959 (struct bfd_hash_entry *, struct bfd_hash_table *, 2960 const char *), 2961 unsigned int entsize) 2962{ 2963 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); 2964} 2965 2966/* Create an a.out link hash table. */ 2967 2968struct bfd_link_hash_table * 2969NAME (aout, link_hash_table_create) (bfd *abfd) 2970{ 2971 struct aout_link_hash_table *ret; 2972 bfd_size_type amt = sizeof (* ret); 2973 2974 ret = (struct aout_link_hash_table *) bfd_malloc (amt); 2975 if (ret == NULL) 2976 return NULL; 2977 2978 if (!NAME (aout, link_hash_table_init) (ret, abfd, 2979 NAME (aout, link_hash_newfunc), 2980 sizeof (struct aout_link_hash_entry))) 2981 { 2982 free (ret); 2983 return NULL; 2984 } 2985 return &ret->root; 2986} 2987 2988/* Add all symbols from an object file to the hash table. */ 2989 2990static bfd_boolean 2991aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) 2992{ 2993 bfd_boolean (*add_one_symbol) 2994 (struct bfd_link_info *, bfd *, const char *, flagword, asection *, 2995 bfd_vma, const char *, bfd_boolean, bfd_boolean, 2996 struct bfd_link_hash_entry **); 2997 struct external_nlist *syms; 2998 bfd_size_type sym_count; 2999 char *strings; 3000 bfd_boolean copy; 3001 struct aout_link_hash_entry **sym_hash; 3002 struct external_nlist *p; 3003 struct external_nlist *pend; 3004 bfd_size_type amt; 3005 3006 syms = obj_aout_external_syms (abfd); 3007 sym_count = obj_aout_external_sym_count (abfd); 3008 strings = obj_aout_external_strings (abfd); 3009 if (info->keep_memory) 3010 copy = FALSE; 3011 else 3012 copy = TRUE; 3013 3014 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 3015 { 3016 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 3017 (abfd, info, &syms, &sym_count, &strings))) 3018 return FALSE; 3019 } 3020 3021 if (sym_count == 0) 3022 return TRUE; /* Nothing to do. */ 3023 3024 /* We keep a list of the linker hash table entries that correspond 3025 to particular symbols. We could just look them up in the hash 3026 table, but keeping the list is more efficient. Perhaps this 3027 should be conditional on info->keep_memory. */ 3028 amt = sym_count * sizeof (struct aout_link_hash_entry *); 3029 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt); 3030 if (sym_hash == NULL) 3031 return FALSE; 3032 obj_aout_sym_hashes (abfd) = sym_hash; 3033 3034 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 3035 if (add_one_symbol == NULL) 3036 add_one_symbol = _bfd_generic_link_add_one_symbol; 3037 3038 p = syms; 3039 pend = p + sym_count; 3040 for (; p < pend; p++, sym_hash++) 3041 { 3042 int type; 3043 const char *name; 3044 bfd_vma value; 3045 asection *section; 3046 flagword flags; 3047 const char *string; 3048 3049 *sym_hash = NULL; 3050 3051 type = H_GET_8 (abfd, p->e_type); 3052 3053 /* Ignore debugging symbols. */ 3054 if ((type & N_STAB) != 0) 3055 continue; 3056 3057 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3058 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3059 return FALSE; 3060 name = strings + GET_WORD (abfd, p->e_strx); 3061 value = GET_WORD (abfd, p->e_value); 3062 flags = BSF_GLOBAL; 3063 string = NULL; 3064 switch (type) 3065 { 3066 default: 3067 abort (); 3068 3069 case N_UNDF: 3070 case N_ABS: 3071 case N_TEXT: 3072 case N_DATA: 3073 case N_BSS: 3074 case N_FN_SEQ: 3075 case N_COMM: 3076 case N_SETV: 3077 case N_FN: 3078 /* Ignore symbols that are not externally visible. */ 3079 continue; 3080 case N_INDR: 3081 /* Ignore local indirect symbol. */ 3082 ++p; 3083 ++sym_hash; 3084 continue; 3085 3086 case N_UNDF | N_EXT: 3087 if (value == 0) 3088 { 3089 section = bfd_und_section_ptr; 3090 flags = 0; 3091 } 3092 else 3093 section = bfd_com_section_ptr; 3094 break; 3095 case N_ABS | N_EXT: 3096 section = bfd_abs_section_ptr; 3097 break; 3098 case N_TEXT | N_EXT: 3099 section = obj_textsec (abfd); 3100 value -= bfd_get_section_vma (abfd, section); 3101 break; 3102 case N_DATA | N_EXT: 3103 case N_SETV | N_EXT: 3104 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3105 translate_from_native_sym_flags. */ 3106 section = obj_datasec (abfd); 3107 value -= bfd_get_section_vma (abfd, section); 3108 break; 3109 case N_BSS | N_EXT: 3110 section = obj_bsssec (abfd); 3111 value -= bfd_get_section_vma (abfd, section); 3112 break; 3113 case N_INDR | N_EXT: 3114 /* An indirect symbol. The next symbol is the symbol 3115 which this one really is. */ 3116 /* See PR 20925 for a reproducer. */ 3117 if (p + 1 >= pend) 3118 return FALSE; 3119 ++p; 3120 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3121 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3122 return FALSE; 3123 string = strings + GET_WORD (abfd, p->e_strx); 3124 section = bfd_ind_section_ptr; 3125 flags |= BSF_INDIRECT; 3126 break; 3127 case N_COMM | N_EXT: 3128 section = bfd_com_section_ptr; 3129 break; 3130 case N_SETA: case N_SETA | N_EXT: 3131 section = bfd_abs_section_ptr; 3132 flags |= BSF_CONSTRUCTOR; 3133 break; 3134 case N_SETT: case N_SETT | N_EXT: 3135 section = obj_textsec (abfd); 3136 flags |= BSF_CONSTRUCTOR; 3137 value -= bfd_get_section_vma (abfd, section); 3138 break; 3139 case N_SETD: case N_SETD | N_EXT: 3140 section = obj_datasec (abfd); 3141 flags |= BSF_CONSTRUCTOR; 3142 value -= bfd_get_section_vma (abfd, section); 3143 break; 3144 case N_SETB: case N_SETB | N_EXT: 3145 section = obj_bsssec (abfd); 3146 flags |= BSF_CONSTRUCTOR; 3147 value -= bfd_get_section_vma (abfd, section); 3148 break; 3149 case N_WARNING: 3150 /* A warning symbol. The next symbol is the one to warn 3151 about. If there is no next symbol, just look away. */ 3152 if (p + 1 >= pend) 3153 return TRUE; 3154 ++p; 3155 string = name; 3156 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3157 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3158 return FALSE; 3159 name = strings + GET_WORD (abfd, p->e_strx); 3160 section = bfd_und_section_ptr; 3161 flags |= BSF_WARNING; 3162 break; 3163 case N_WEAKU: 3164 section = bfd_und_section_ptr; 3165 flags = BSF_WEAK; 3166 break; 3167 case N_WEAKA: 3168 section = bfd_abs_section_ptr; 3169 flags = BSF_WEAK; 3170 break; 3171 case N_WEAKT: 3172 section = obj_textsec (abfd); 3173 value -= bfd_get_section_vma (abfd, section); 3174 flags = BSF_WEAK; 3175 break; 3176 case N_WEAKD: 3177 section = obj_datasec (abfd); 3178 value -= bfd_get_section_vma (abfd, section); 3179 flags = BSF_WEAK; 3180 break; 3181 case N_WEAKB: 3182 section = obj_bsssec (abfd); 3183 value -= bfd_get_section_vma (abfd, section); 3184 flags = BSF_WEAK; 3185 break; 3186 } 3187 3188 if (! ((*add_one_symbol) 3189 (info, abfd, name, flags, section, value, string, copy, FALSE, 3190 (struct bfd_link_hash_entry **) sym_hash))) 3191 return FALSE; 3192 3193 /* Restrict the maximum alignment of a common symbol based on 3194 the architecture, since a.out has no way to represent 3195 alignment requirements of a section in a .o file. FIXME: 3196 This isn't quite right: it should use the architecture of the 3197 output file, not the input files. */ 3198 if ((*sym_hash)->root.type == bfd_link_hash_common 3199 && ((*sym_hash)->root.u.c.p->alignment_power > 3200 bfd_get_arch_info (abfd)->section_align_power)) 3201 (*sym_hash)->root.u.c.p->alignment_power = 3202 bfd_get_arch_info (abfd)->section_align_power; 3203 3204 /* If this is a set symbol, and we are not building sets, then 3205 it is possible for the hash entry to not have been set. In 3206 such a case, treat the symbol as not globally defined. */ 3207 if ((*sym_hash)->root.type == bfd_link_hash_new) 3208 { 3209 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3210 *sym_hash = NULL; 3211 } 3212 3213 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3214 ++sym_hash; 3215 } 3216 3217 return TRUE; 3218} 3219 3220/* Free up the internal symbols read from an a.out file. */ 3221 3222static bfd_boolean 3223aout_link_free_symbols (bfd *abfd) 3224{ 3225 if (obj_aout_external_syms (abfd) != NULL) 3226 { 3227#ifdef USE_MMAP 3228 bfd_free_window (&obj_aout_sym_window (abfd)); 3229#else 3230 free ((void *) obj_aout_external_syms (abfd)); 3231#endif 3232 obj_aout_external_syms (abfd) = NULL; 3233 } 3234 if (obj_aout_external_strings (abfd) != NULL) 3235 { 3236#ifdef USE_MMAP 3237 bfd_free_window (&obj_aout_string_window (abfd)); 3238#else 3239 free ((void *) obj_aout_external_strings (abfd)); 3240#endif 3241 obj_aout_external_strings (abfd) = NULL; 3242 } 3243 return TRUE; 3244} 3245 3246/* Add symbols from an a.out object file. */ 3247 3248static bfd_boolean 3249aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) 3250{ 3251 if (! aout_get_external_symbols (abfd)) 3252 return FALSE; 3253 if (! aout_link_add_symbols (abfd, info)) 3254 return FALSE; 3255 if (! info->keep_memory) 3256 { 3257 if (! aout_link_free_symbols (abfd)) 3258 return FALSE; 3259 } 3260 return TRUE; 3261} 3262 3263/* Look through the internal symbols to see if this object file should 3264 be included in the link. We should include this object file if it 3265 defines any symbols which are currently undefined. If this object 3266 file defines a common symbol, then we may adjust the size of the 3267 known symbol but we do not include the object file in the link 3268 (unless there is some other reason to include it). */ 3269 3270static bfd_boolean 3271aout_link_check_ar_symbols (bfd *abfd, 3272 struct bfd_link_info *info, 3273 bfd_boolean *pneeded, 3274 bfd **subsbfd) 3275{ 3276 struct external_nlist *p; 3277 struct external_nlist *pend; 3278 char *strings; 3279 3280 *pneeded = FALSE; 3281 3282 /* Look through all the symbols. */ 3283 p = obj_aout_external_syms (abfd); 3284 pend = p + obj_aout_external_sym_count (abfd); 3285 strings = obj_aout_external_strings (abfd); 3286 for (; p < pend; p++) 3287 { 3288 int type = H_GET_8 (abfd, p->e_type); 3289 const char *name; 3290 struct bfd_link_hash_entry *h; 3291 3292 /* Ignore symbols that are not externally visible. This is an 3293 optimization only, as we check the type more thoroughly 3294 below. */ 3295 if (((type & N_EXT) == 0 3296 || (type & N_STAB) != 0 3297 || type == N_FN) 3298 && type != N_WEAKA 3299 && type != N_WEAKT 3300 && type != N_WEAKD 3301 && type != N_WEAKB) 3302 { 3303 if (type == N_WARNING 3304 || type == N_INDR) 3305 ++p; 3306 continue; 3307 } 3308 3309 name = strings + GET_WORD (abfd, p->e_strx); 3310 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 3311 3312 /* We are only interested in symbols that are currently 3313 undefined or common. */ 3314 if (h == NULL 3315 || (h->type != bfd_link_hash_undefined 3316 && h->type != bfd_link_hash_common)) 3317 { 3318 if (type == (N_INDR | N_EXT)) 3319 ++p; 3320 continue; 3321 } 3322 3323 if (type == (N_TEXT | N_EXT) 3324 || type == (N_DATA | N_EXT) 3325 || type == (N_BSS | N_EXT) 3326 || type == (N_ABS | N_EXT) 3327 || type == (N_INDR | N_EXT)) 3328 { 3329 /* This object file defines this symbol. We must link it 3330 in. This is true regardless of whether the current 3331 definition of the symbol is undefined or common. 3332 3333 If the current definition is common, we have a case in 3334 which we have already seen an object file including: 3335 int a; 3336 and this object file from the archive includes: 3337 int a = 5; 3338 In such a case, whether to include this object is target 3339 dependant for backward compatibility. 3340 3341 FIXME: The SunOS 4.1.3 linker will pull in the archive 3342 element if the symbol is defined in the .data section, 3343 but not if it is defined in the .text section. That 3344 seems a bit crazy to me, and it has not been implemented 3345 yet. However, it might be correct. */ 3346 if (h->type == bfd_link_hash_common) 3347 { 3348 int skip = 0; 3349 3350 switch (info->common_skip_ar_symbols) 3351 { 3352 case bfd_link_common_skip_text: 3353 skip = (type == (N_TEXT | N_EXT)); 3354 break; 3355 case bfd_link_common_skip_data: 3356 skip = (type == (N_DATA | N_EXT)); 3357 break; 3358 default: 3359 case bfd_link_common_skip_all: 3360 skip = 1; 3361 break; 3362 } 3363 3364 if (skip) 3365 continue; 3366 } 3367 3368 if (!(*info->callbacks 3369 ->add_archive_element) (info, abfd, name, subsbfd)) 3370 return FALSE; 3371 *pneeded = TRUE; 3372 return TRUE; 3373 } 3374 3375 if (type == (N_UNDF | N_EXT)) 3376 { 3377 bfd_vma value; 3378 3379 value = GET_WORD (abfd, p->e_value); 3380 if (value != 0) 3381 { 3382 /* This symbol is common in the object from the archive 3383 file. */ 3384 if (h->type == bfd_link_hash_undefined) 3385 { 3386 bfd *symbfd; 3387 unsigned int power; 3388 3389 symbfd = h->u.undef.abfd; 3390 if (symbfd == NULL) 3391 { 3392 /* This symbol was created as undefined from 3393 outside BFD. We assume that we should link 3394 in the object file. This is done for the -u 3395 option in the linker. */ 3396 if (!(*info->callbacks 3397 ->add_archive_element) (info, abfd, name, subsbfd)) 3398 return FALSE; 3399 *pneeded = TRUE; 3400 return TRUE; 3401 } 3402 /* Turn the current link symbol into a common 3403 symbol. It is already on the undefs list. */ 3404 h->type = bfd_link_hash_common; 3405 h->u.c.p = (struct bfd_link_hash_common_entry *) 3406 bfd_hash_allocate (&info->hash->table, 3407 sizeof (struct bfd_link_hash_common_entry)); 3408 if (h->u.c.p == NULL) 3409 return FALSE; 3410 3411 h->u.c.size = value; 3412 3413 /* FIXME: This isn't quite right. The maximum 3414 alignment of a common symbol should be set by the 3415 architecture of the output file, not of the input 3416 file. */ 3417 power = bfd_log2 (value); 3418 if (power > bfd_get_arch_info (abfd)->section_align_power) 3419 power = bfd_get_arch_info (abfd)->section_align_power; 3420 h->u.c.p->alignment_power = power; 3421 3422 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3423 "COMMON"); 3424 } 3425 else 3426 { 3427 /* Adjust the size of the common symbol if 3428 necessary. */ 3429 if (value > h->u.c.size) 3430 h->u.c.size = value; 3431 } 3432 } 3433 } 3434 3435 if (type == N_WEAKA 3436 || type == N_WEAKT 3437 || type == N_WEAKD 3438 || type == N_WEAKB) 3439 { 3440 /* This symbol is weak but defined. We must pull it in if 3441 the current link symbol is undefined, but we don't want 3442 it if the current link symbol is common. */ 3443 if (h->type == bfd_link_hash_undefined) 3444 { 3445 if (!(*info->callbacks 3446 ->add_archive_element) (info, abfd, name, subsbfd)) 3447 return FALSE; 3448 *pneeded = TRUE; 3449 return TRUE; 3450 } 3451 } 3452 } 3453 3454 /* We do not need this object file. */ 3455 return TRUE; 3456} 3457/* Check a single archive element to see if we need to include it in 3458 the link. *PNEEDED is set according to whether this element is 3459 needed in the link or not. This is called from 3460 _bfd_generic_link_add_archive_symbols. */ 3461 3462static bfd_boolean 3463aout_link_check_archive_element (bfd *abfd, 3464 struct bfd_link_info *info, 3465 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED, 3466 const char *name ATTRIBUTE_UNUSED, 3467 bfd_boolean *pneeded) 3468{ 3469 bfd *oldbfd; 3470 bfd_boolean needed; 3471 3472 if (!aout_get_external_symbols (abfd)) 3473 return FALSE; 3474 3475 oldbfd = abfd; 3476 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd)) 3477 return FALSE; 3478 3479 needed = *pneeded; 3480 if (needed) 3481 { 3482 /* Potentially, the add_archive_element hook may have set a 3483 substitute BFD for us. */ 3484 if (abfd != oldbfd) 3485 { 3486 if (!info->keep_memory 3487 && !aout_link_free_symbols (oldbfd)) 3488 return FALSE; 3489 if (!aout_get_external_symbols (abfd)) 3490 return FALSE; 3491 } 3492 if (!aout_link_add_symbols (abfd, info)) 3493 return FALSE; 3494 } 3495 3496 if (!info->keep_memory || !needed) 3497 { 3498 if (!aout_link_free_symbols (abfd)) 3499 return FALSE; 3500 } 3501 3502 return TRUE; 3503} 3504 3505/* Given an a.out BFD, add symbols to the global hash table as 3506 appropriate. */ 3507 3508bfd_boolean 3509NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) 3510{ 3511 switch (bfd_get_format (abfd)) 3512 { 3513 case bfd_object: 3514 return aout_link_add_object_symbols (abfd, info); 3515 case bfd_archive: 3516 return _bfd_generic_link_add_archive_symbols 3517 (abfd, info, aout_link_check_archive_element); 3518 default: 3519 bfd_set_error (bfd_error_wrong_format); 3520 return FALSE; 3521 } 3522} 3523 3524/* A hash table used for header files with N_BINCL entries. */ 3525 3526struct aout_link_includes_table 3527{ 3528 struct bfd_hash_table root; 3529}; 3530 3531/* A linked list of totals that we have found for a particular header 3532 file. */ 3533 3534struct aout_link_includes_totals 3535{ 3536 struct aout_link_includes_totals *next; 3537 bfd_vma total; 3538}; 3539 3540/* An entry in the header file hash table. */ 3541 3542struct aout_link_includes_entry 3543{ 3544 struct bfd_hash_entry root; 3545 /* List of totals we have found for this file. */ 3546 struct aout_link_includes_totals *totals; 3547}; 3548 3549/* Look up an entry in an the header file hash table. */ 3550 3551#define aout_link_includes_lookup(table, string, create, copy) \ 3552 ((struct aout_link_includes_entry *) \ 3553 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3554 3555/* During the final link step we need to pass around a bunch of 3556 information, so we do it in an instance of this structure. */ 3557 3558struct aout_final_link_info 3559{ 3560 /* General link information. */ 3561 struct bfd_link_info *info; 3562 /* Output bfd. */ 3563 bfd *output_bfd; 3564 /* Reloc file positions. */ 3565 file_ptr treloff, dreloff; 3566 /* File position of symbols. */ 3567 file_ptr symoff; 3568 /* String table. */ 3569 struct bfd_strtab_hash *strtab; 3570 /* Header file hash table. */ 3571 struct aout_link_includes_table includes; 3572 /* A buffer large enough to hold the contents of any section. */ 3573 bfd_byte *contents; 3574 /* A buffer large enough to hold the relocs of any section. */ 3575 void * relocs; 3576 /* A buffer large enough to hold the symbol map of any input BFD. */ 3577 int *symbol_map; 3578 /* A buffer large enough to hold output symbols of any input BFD. */ 3579 struct external_nlist *output_syms; 3580}; 3581 3582/* The function to create a new entry in the header file hash table. */ 3583 3584static struct bfd_hash_entry * 3585aout_link_includes_newfunc (struct bfd_hash_entry *entry, 3586 struct bfd_hash_table *table, 3587 const char *string) 3588{ 3589 struct aout_link_includes_entry *ret = 3590 (struct aout_link_includes_entry *) entry; 3591 3592 /* Allocate the structure if it has not already been allocated by a 3593 subclass. */ 3594 if (ret == NULL) 3595 ret = (struct aout_link_includes_entry *) 3596 bfd_hash_allocate (table, sizeof (* ret)); 3597 if (ret == NULL) 3598 return NULL; 3599 3600 /* Call the allocation method of the superclass. */ 3601 ret = ((struct aout_link_includes_entry *) 3602 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3603 if (ret) 3604 { 3605 /* Set local fields. */ 3606 ret->totals = NULL; 3607 } 3608 3609 return (struct bfd_hash_entry *) ret; 3610} 3611 3612/* Write out a symbol that was not associated with an a.out input 3613 object. */ 3614 3615static bfd_boolean 3616aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data) 3617{ 3618 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh; 3619 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data; 3620 bfd *output_bfd; 3621 int type; 3622 bfd_vma val; 3623 struct external_nlist outsym; 3624 bfd_size_type indx; 3625 bfd_size_type amt; 3626 3627 if (h->root.type == bfd_link_hash_warning) 3628 { 3629 h = (struct aout_link_hash_entry *) h->root.u.i.link; 3630 if (h->root.type == bfd_link_hash_new) 3631 return TRUE; 3632 } 3633 3634 output_bfd = flaginfo->output_bfd; 3635 3636 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 3637 { 3638 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 3639 (output_bfd, flaginfo->info, h))) 3640 { 3641 /* FIXME: No way to handle errors. */ 3642 abort (); 3643 } 3644 } 3645 3646 if (h->written) 3647 return TRUE; 3648 3649 h->written = TRUE; 3650 3651 /* An indx of -2 means the symbol must be written. */ 3652 if (h->indx != -2 3653 && (flaginfo->info->strip == strip_all 3654 || (flaginfo->info->strip == strip_some 3655 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string, 3656 FALSE, FALSE) == NULL))) 3657 return TRUE; 3658 3659 switch (h->root.type) 3660 { 3661 default: 3662 case bfd_link_hash_warning: 3663 abort (); 3664 /* Avoid variable not initialized warnings. */ 3665 return TRUE; 3666 case bfd_link_hash_new: 3667 /* This can happen for set symbols when sets are not being 3668 built. */ 3669 return TRUE; 3670 case bfd_link_hash_undefined: 3671 type = N_UNDF | N_EXT; 3672 val = 0; 3673 break; 3674 case bfd_link_hash_defined: 3675 case bfd_link_hash_defweak: 3676 { 3677 asection *sec; 3678 3679 sec = h->root.u.def.section->output_section; 3680 BFD_ASSERT (bfd_is_abs_section (sec) 3681 || sec->owner == output_bfd); 3682 if (sec == obj_textsec (output_bfd)) 3683 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 3684 else if (sec == obj_datasec (output_bfd)) 3685 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 3686 else if (sec == obj_bsssec (output_bfd)) 3687 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 3688 else 3689 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 3690 type |= N_EXT; 3691 val = (h->root.u.def.value 3692 + sec->vma 3693 + h->root.u.def.section->output_offset); 3694 } 3695 break; 3696 case bfd_link_hash_common: 3697 type = N_UNDF | N_EXT; 3698 val = h->root.u.c.size; 3699 break; 3700 case bfd_link_hash_undefweak: 3701 type = N_WEAKU; 3702 val = 0; 3703 break; 3704 case bfd_link_hash_indirect: 3705 /* We ignore these symbols, since the indirected symbol is 3706 already in the hash table. */ 3707 return TRUE; 3708 } 3709 3710 H_PUT_8 (output_bfd, type, outsym.e_type); 3711 H_PUT_8 (output_bfd, 0, outsym.e_other); 3712 H_PUT_16 (output_bfd, 0, outsym.e_desc); 3713 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string, 3714 FALSE); 3715 if (indx == - (bfd_size_type) 1) 3716 /* FIXME: No way to handle errors. */ 3717 abort (); 3718 3719 PUT_WORD (output_bfd, indx, outsym.e_strx); 3720 PUT_WORD (output_bfd, val, outsym.e_value); 3721 3722 amt = EXTERNAL_NLIST_SIZE; 3723 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0 3724 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) 3725 /* FIXME: No way to handle errors. */ 3726 abort (); 3727 3728 flaginfo->symoff += EXTERNAL_NLIST_SIZE; 3729 h->indx = obj_aout_external_sym_count (output_bfd); 3730 ++obj_aout_external_sym_count (output_bfd); 3731 3732 return TRUE; 3733} 3734 3735/* Handle a link order which is supposed to generate a reloc. */ 3736 3737static bfd_boolean 3738aout_link_reloc_link_order (struct aout_final_link_info *flaginfo, 3739 asection *o, 3740 struct bfd_link_order *p) 3741{ 3742 struct bfd_link_order_reloc *pr; 3743 int r_index; 3744 int r_extern; 3745 reloc_howto_type *howto; 3746 file_ptr *reloff_ptr = NULL; 3747 struct reloc_std_external srel; 3748 struct reloc_ext_external erel; 3749 void * rel_ptr; 3750 bfd_size_type amt; 3751 3752 pr = p->u.reloc.p; 3753 3754 if (p->type == bfd_section_reloc_link_order) 3755 { 3756 r_extern = 0; 3757 if (bfd_is_abs_section (pr->u.section)) 3758 r_index = N_ABS | N_EXT; 3759 else 3760 { 3761 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd); 3762 r_index = pr->u.section->target_index; 3763 } 3764 } 3765 else 3766 { 3767 struct aout_link_hash_entry *h; 3768 3769 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 3770 r_extern = 1; 3771 h = ((struct aout_link_hash_entry *) 3772 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info, 3773 pr->u.name, FALSE, FALSE, TRUE)); 3774 if (h != NULL 3775 && h->indx >= 0) 3776 r_index = h->indx; 3777 else if (h != NULL) 3778 { 3779 /* We decided to strip this symbol, but it turns out that we 3780 can't. Note that we lose the other and desc information 3781 here. I don't think that will ever matter for a global 3782 symbol. */ 3783 h->indx = -2; 3784 h->written = FALSE; 3785 if (!aout_link_write_other_symbol (&h->root.root, flaginfo)) 3786 return FALSE; 3787 r_index = h->indx; 3788 } 3789 else 3790 { 3791 (*flaginfo->info->callbacks->unattached_reloc) 3792 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0); 3793 r_index = 0; 3794 } 3795 } 3796 3797 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc); 3798 if (howto == 0) 3799 { 3800 bfd_set_error (bfd_error_bad_value); 3801 return FALSE; 3802 } 3803 3804 if (o == obj_textsec (flaginfo->output_bfd)) 3805 reloff_ptr = &flaginfo->treloff; 3806 else if (o == obj_datasec (flaginfo->output_bfd)) 3807 reloff_ptr = &flaginfo->dreloff; 3808 else 3809 abort (); 3810 3811 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE) 3812 { 3813#ifdef MY_put_reloc 3814 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto, 3815 &srel); 3816#else 3817 { 3818 int r_pcrel; 3819 int r_baserel; 3820 int r_jmptable; 3821 int r_relative; 3822 int r_length; 3823 3824 r_pcrel = (int) howto->pc_relative; 3825 r_baserel = (howto->type & 8) != 0; 3826 r_jmptable = (howto->type & 16) != 0; 3827 r_relative = (howto->type & 32) != 0; 3828 r_length = howto->size; 3829 3830 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address); 3831 if (bfd_header_big_endian (flaginfo->output_bfd)) 3832 { 3833 srel.r_index[0] = r_index >> 16; 3834 srel.r_index[1] = r_index >> 8; 3835 srel.r_index[2] = r_index; 3836 srel.r_type[0] = 3837 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 3838 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 3839 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 3840 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 3841 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 3842 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 3843 } 3844 else 3845 { 3846 srel.r_index[2] = r_index >> 16; 3847 srel.r_index[1] = r_index >> 8; 3848 srel.r_index[0] = r_index; 3849 srel.r_type[0] = 3850 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 3851 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 3852 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 3853 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 3854 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 3855 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 3856 } 3857 } 3858#endif 3859 rel_ptr = (void *) &srel; 3860 3861 /* We have to write the addend into the object file, since 3862 standard a.out relocs are in place. It would be more 3863 reliable if we had the current contents of the file here, 3864 rather than assuming zeroes, but we can't read the file since 3865 it was opened using bfd_openw. */ 3866 if (pr->addend != 0) 3867 { 3868 bfd_size_type size; 3869 bfd_reloc_status_type r; 3870 bfd_byte *buf; 3871 bfd_boolean ok; 3872 3873 size = bfd_get_reloc_size (howto); 3874 buf = (bfd_byte *) bfd_zmalloc (size); 3875 if (buf == NULL && size != 0) 3876 return FALSE; 3877 r = MY_relocate_contents (howto, flaginfo->output_bfd, 3878 (bfd_vma) pr->addend, buf); 3879 switch (r) 3880 { 3881 case bfd_reloc_ok: 3882 break; 3883 default: 3884 case bfd_reloc_outofrange: 3885 abort (); 3886 case bfd_reloc_overflow: 3887 (*flaginfo->info->callbacks->reloc_overflow) 3888 (flaginfo->info, NULL, 3889 (p->type == bfd_section_reloc_link_order 3890 ? bfd_section_name (flaginfo->output_bfd, 3891 pr->u.section) 3892 : pr->u.name), 3893 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0); 3894 break; 3895 } 3896 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf, 3897 (file_ptr) p->offset, size); 3898 free (buf); 3899 if (! ok) 3900 return FALSE; 3901 } 3902 } 3903 else 3904 { 3905#ifdef MY_put_ext_reloc 3906 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, 3907 howto, &erel, pr->addend); 3908#else 3909 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address); 3910 3911 if (bfd_header_big_endian (flaginfo->output_bfd)) 3912 { 3913 erel.r_index[0] = r_index >> 16; 3914 erel.r_index[1] = r_index >> 8; 3915 erel.r_index[2] = r_index; 3916 erel.r_type[0] = 3917 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 3918 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 3919 } 3920 else 3921 { 3922 erel.r_index[2] = r_index >> 16; 3923 erel.r_index[1] = r_index >> 8; 3924 erel.r_index[0] = r_index; 3925 erel.r_type[0] = 3926 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 3927 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 3928 } 3929 3930 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 3931#endif /* MY_put_ext_reloc */ 3932 3933 rel_ptr = (void *) &erel; 3934 } 3935 3936 amt = obj_reloc_entry_size (flaginfo->output_bfd); 3937 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 3938 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt) 3939 return FALSE; 3940 3941 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd); 3942 3943 /* Assert that the relocs have not run into the symbols, and that n 3944 the text relocs have not run into the data relocs. */ 3945 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 3946 && (reloff_ptr != &flaginfo->treloff 3947 || (*reloff_ptr 3948 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 3949 3950 return TRUE; 3951} 3952 3953/* Get the section corresponding to a reloc index. */ 3954 3955static INLINE asection * 3956aout_reloc_index_to_section (bfd *abfd, int indx) 3957{ 3958 switch (indx & N_TYPE) 3959 { 3960 case N_TEXT: return obj_textsec (abfd); 3961 case N_DATA: return obj_datasec (abfd); 3962 case N_BSS: return obj_bsssec (abfd); 3963 case N_ABS: 3964 case N_UNDF: return bfd_abs_section_ptr; 3965 default: abort (); 3966 } 3967 return NULL; 3968} 3969 3970/* Relocate an a.out section using standard a.out relocs. */ 3971 3972static bfd_boolean 3973aout_link_input_section_std (struct aout_final_link_info *flaginfo, 3974 bfd *input_bfd, 3975 asection *input_section, 3976 struct reloc_std_external *relocs, 3977 bfd_size_type rel_size, 3978 bfd_byte *contents) 3979{ 3980 bfd_boolean (*check_dynamic_reloc) 3981 (struct bfd_link_info *, bfd *, asection *, 3982 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 3983 bfd_vma *); 3984 bfd *output_bfd; 3985 bfd_boolean relocatable; 3986 struct external_nlist *syms; 3987 char *strings; 3988 struct aout_link_hash_entry **sym_hashes; 3989 int *symbol_map; 3990 bfd_size_type reloc_count; 3991 struct reloc_std_external *rel; 3992 struct reloc_std_external *rel_end; 3993 3994 output_bfd = flaginfo->output_bfd; 3995 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 3996 3997 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 3998 BFD_ASSERT (input_bfd->xvec->header_byteorder 3999 == output_bfd->xvec->header_byteorder); 4000 4001 relocatable = bfd_link_relocatable (flaginfo->info); 4002 syms = obj_aout_external_syms (input_bfd); 4003 strings = obj_aout_external_strings (input_bfd); 4004 sym_hashes = obj_aout_sym_hashes (input_bfd); 4005 symbol_map = flaginfo->symbol_map; 4006 4007 reloc_count = rel_size / RELOC_STD_SIZE; 4008 rel = relocs; 4009 rel_end = rel + reloc_count; 4010 for (; rel < rel_end; rel++) 4011 { 4012 bfd_vma r_addr; 4013 int r_index; 4014 int r_extern; 4015 int r_pcrel; 4016 int r_baserel = 0; 4017 reloc_howto_type *howto; 4018 struct aout_link_hash_entry *h = NULL; 4019 bfd_vma relocation; 4020 bfd_reloc_status_type r; 4021 4022 r_addr = GET_SWORD (input_bfd, rel->r_address); 4023 4024#ifdef MY_reloc_howto 4025 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 4026#else 4027 { 4028 int r_jmptable; 4029 int r_relative; 4030 int r_length; 4031 unsigned int howto_idx; 4032 4033 if (bfd_header_big_endian (input_bfd)) 4034 { 4035 r_index = (((unsigned int) rel->r_index[0] << 16) 4036 | ((unsigned int) rel->r_index[1] << 8) 4037 | rel->r_index[2]); 4038 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 4039 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 4040 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 4041 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 4042 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 4043 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 4044 >> RELOC_STD_BITS_LENGTH_SH_BIG); 4045 } 4046 else 4047 { 4048 r_index = (((unsigned int) rel->r_index[2] << 16) 4049 | ((unsigned int) rel->r_index[1] << 8) 4050 | rel->r_index[0]); 4051 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 4052 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 4053 r_baserel = (0 != (rel->r_type[0] 4054 & RELOC_STD_BITS_BASEREL_LITTLE)); 4055 r_jmptable= (0 != (rel->r_type[0] 4056 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 4057 r_relative= (0 != (rel->r_type[0] 4058 & RELOC_STD_BITS_RELATIVE_LITTLE)); 4059 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 4060 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 4061 } 4062 4063 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 4064 + 16 * r_jmptable + 32 * r_relative); 4065 if (howto_idx < TABLE_SIZE (howto_table_std)) 4066 howto = howto_table_std + howto_idx; 4067 else 4068 howto = NULL; 4069 } 4070#endif 4071 4072 if (howto == NULL) 4073 { 4074 (*flaginfo->info->callbacks->einfo) 4075 (_("%P: %B: unexpected relocation type\n"), input_bfd); 4076 bfd_set_error (bfd_error_bad_value); 4077 return FALSE; 4078 } 4079 4080 if (relocatable) 4081 { 4082 /* We are generating a relocatable output file, and must 4083 modify the reloc accordingly. */ 4084 if (r_extern) 4085 { 4086 /* If we know the symbol this relocation is against, 4087 convert it into a relocation against a section. This 4088 is what the native linker does. */ 4089 h = sym_hashes[r_index]; 4090 if (h != NULL 4091 && (h->root.type == bfd_link_hash_defined 4092 || h->root.type == bfd_link_hash_defweak)) 4093 { 4094 asection *output_section; 4095 4096 /* Change the r_extern value. */ 4097 if (bfd_header_big_endian (output_bfd)) 4098 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4099 else 4100 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4101 4102 /* Compute a new r_index. */ 4103 output_section = h->root.u.def.section->output_section; 4104 if (output_section == obj_textsec (output_bfd)) 4105 r_index = N_TEXT; 4106 else if (output_section == obj_datasec (output_bfd)) 4107 r_index = N_DATA; 4108 else if (output_section == obj_bsssec (output_bfd)) 4109 r_index = N_BSS; 4110 else 4111 r_index = N_ABS; 4112 4113 /* Add the symbol value and the section VMA to the 4114 addend stored in the contents. */ 4115 relocation = (h->root.u.def.value 4116 + output_section->vma 4117 + h->root.u.def.section->output_offset); 4118 } 4119 else 4120 { 4121 /* We must change r_index according to the symbol 4122 map. */ 4123 r_index = symbol_map[r_index]; 4124 4125 if (r_index == -1) 4126 { 4127 if (h != NULL) 4128 { 4129 /* We decided to strip this symbol, but it 4130 turns out that we can't. Note that we 4131 lose the other and desc information here. 4132 I don't think that will ever matter for a 4133 global symbol. */ 4134 if (h->indx < 0) 4135 { 4136 h->indx = -2; 4137 h->written = FALSE; 4138 if (!aout_link_write_other_symbol (&h->root.root, 4139 flaginfo)) 4140 return FALSE; 4141 } 4142 r_index = h->indx; 4143 } 4144 else 4145 { 4146 const char *name; 4147 4148 name = strings + GET_WORD (input_bfd, 4149 syms[r_index].e_strx); 4150 (*flaginfo->info->callbacks->unattached_reloc) 4151 (flaginfo->info, name, 4152 input_bfd, input_section, r_addr); 4153 r_index = 0; 4154 } 4155 } 4156 4157 relocation = 0; 4158 } 4159 4160 /* Write out the new r_index value. */ 4161 if (bfd_header_big_endian (output_bfd)) 4162 { 4163 rel->r_index[0] = r_index >> 16; 4164 rel->r_index[1] = r_index >> 8; 4165 rel->r_index[2] = r_index; 4166 } 4167 else 4168 { 4169 rel->r_index[2] = r_index >> 16; 4170 rel->r_index[1] = r_index >> 8; 4171 rel->r_index[0] = r_index; 4172 } 4173 } 4174 else 4175 { 4176 asection *section; 4177 4178 /* This is a relocation against a section. We must 4179 adjust by the amount that the section moved. */ 4180 section = aout_reloc_index_to_section (input_bfd, r_index); 4181 relocation = (section->output_section->vma 4182 + section->output_offset 4183 - section->vma); 4184 } 4185 4186 /* Change the address of the relocation. */ 4187 PUT_WORD (output_bfd, 4188 r_addr + input_section->output_offset, 4189 rel->r_address); 4190 4191 /* Adjust a PC relative relocation by removing the reference 4192 to the original address in the section and including the 4193 reference to the new address. */ 4194 if (r_pcrel) 4195 relocation -= (input_section->output_section->vma 4196 + input_section->output_offset 4197 - input_section->vma); 4198 4199#ifdef MY_relocatable_reloc 4200 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4201#endif 4202 4203 if (relocation == 0) 4204 r = bfd_reloc_ok; 4205 else 4206 r = MY_relocate_contents (howto, 4207 input_bfd, relocation, 4208 contents + r_addr); 4209 } 4210 else 4211 { 4212 bfd_boolean hundef; 4213 4214 /* We are generating an executable, and must do a full 4215 relocation. */ 4216 hundef = FALSE; 4217 4218 if (r_extern) 4219 { 4220 h = sym_hashes[r_index]; 4221 4222 if (h != NULL 4223 && (h->root.type == bfd_link_hash_defined 4224 || h->root.type == bfd_link_hash_defweak)) 4225 { 4226 relocation = (h->root.u.def.value 4227 + h->root.u.def.section->output_section->vma 4228 + h->root.u.def.section->output_offset); 4229 } 4230 else if (h != NULL 4231 && h->root.type == bfd_link_hash_undefweak) 4232 relocation = 0; 4233 else 4234 { 4235 hundef = TRUE; 4236 relocation = 0; 4237 } 4238 } 4239 else 4240 { 4241 asection *section; 4242 4243 section = aout_reloc_index_to_section (input_bfd, r_index); 4244 relocation = (section->output_section->vma 4245 + section->output_offset 4246 - section->vma); 4247 if (r_pcrel) 4248 relocation += input_section->vma; 4249 } 4250 4251 if (check_dynamic_reloc != NULL) 4252 { 4253 bfd_boolean skip; 4254 4255 if (! ((*check_dynamic_reloc) 4256 (flaginfo->info, input_bfd, input_section, h, 4257 (void *) rel, contents, &skip, &relocation))) 4258 return FALSE; 4259 if (skip) 4260 continue; 4261 } 4262 4263 /* Now warn if a global symbol is undefined. We could not 4264 do this earlier, because check_dynamic_reloc might want 4265 to skip this reloc. */ 4266 if (hundef && ! bfd_link_pic (flaginfo->info) && ! r_baserel) 4267 { 4268 const char *name; 4269 4270 if (h != NULL) 4271 name = h->root.root.string; 4272 else 4273 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4274 (*flaginfo->info->callbacks->undefined_symbol) 4275 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE); 4276 } 4277 4278 r = MY_final_link_relocate (howto, 4279 input_bfd, input_section, 4280 contents, r_addr, relocation, 4281 (bfd_vma) 0); 4282 } 4283 4284 if (r != bfd_reloc_ok) 4285 { 4286 switch (r) 4287 { 4288 default: 4289 case bfd_reloc_outofrange: 4290 abort (); 4291 case bfd_reloc_overflow: 4292 { 4293 const char *name; 4294 4295 if (h != NULL) 4296 name = NULL; 4297 else if (r_extern) 4298 name = strings + GET_WORD (input_bfd, 4299 syms[r_index].e_strx); 4300 else 4301 { 4302 asection *s; 4303 4304 s = aout_reloc_index_to_section (input_bfd, r_index); 4305 name = bfd_section_name (input_bfd, s); 4306 } 4307 (*flaginfo->info->callbacks->reloc_overflow) 4308 (flaginfo->info, (h ? &h->root : NULL), name, howto->name, 4309 (bfd_vma) 0, input_bfd, input_section, r_addr); 4310 } 4311 break; 4312 } 4313 } 4314 } 4315 4316 return TRUE; 4317} 4318 4319/* Relocate an a.out section using extended a.out relocs. */ 4320 4321static bfd_boolean 4322aout_link_input_section_ext (struct aout_final_link_info *flaginfo, 4323 bfd *input_bfd, 4324 asection *input_section, 4325 struct reloc_ext_external *relocs, 4326 bfd_size_type rel_size, 4327 bfd_byte *contents) 4328{ 4329 bfd_boolean (*check_dynamic_reloc) 4330 (struct bfd_link_info *, bfd *, asection *, 4331 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 4332 bfd_vma *); 4333 bfd *output_bfd; 4334 bfd_boolean relocatable; 4335 struct external_nlist *syms; 4336 char *strings; 4337 struct aout_link_hash_entry **sym_hashes; 4338 int *symbol_map; 4339 bfd_size_type reloc_count; 4340 struct reloc_ext_external *rel; 4341 struct reloc_ext_external *rel_end; 4342 4343 output_bfd = flaginfo->output_bfd; 4344 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4345 4346 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 4347 BFD_ASSERT (input_bfd->xvec->header_byteorder 4348 == output_bfd->xvec->header_byteorder); 4349 4350 relocatable = bfd_link_relocatable (flaginfo->info); 4351 syms = obj_aout_external_syms (input_bfd); 4352 strings = obj_aout_external_strings (input_bfd); 4353 sym_hashes = obj_aout_sym_hashes (input_bfd); 4354 symbol_map = flaginfo->symbol_map; 4355 4356 reloc_count = rel_size / RELOC_EXT_SIZE; 4357 rel = relocs; 4358 rel_end = rel + reloc_count; 4359 for (; rel < rel_end; rel++) 4360 { 4361 bfd_vma r_addr; 4362 int r_index; 4363 int r_extern; 4364 unsigned int r_type; 4365 bfd_vma r_addend; 4366 struct aout_link_hash_entry *h = NULL; 4367 asection *r_section = NULL; 4368 bfd_vma relocation; 4369 4370 r_addr = GET_SWORD (input_bfd, rel->r_address); 4371 4372 if (bfd_header_big_endian (input_bfd)) 4373 { 4374 r_index = (((unsigned int) rel->r_index[0] << 16) 4375 | ((unsigned int) rel->r_index[1] << 8) 4376 | rel->r_index[2]); 4377 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 4378 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 4379 >> RELOC_EXT_BITS_TYPE_SH_BIG); 4380 } 4381 else 4382 { 4383 r_index = (((unsigned int) rel->r_index[2] << 16) 4384 | ((unsigned int) rel->r_index[1] << 8) 4385 | rel->r_index[0]); 4386 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 4387 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 4388 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 4389 } 4390 4391 r_addend = GET_SWORD (input_bfd, rel->r_addend); 4392 4393 if (r_type >= TABLE_SIZE (howto_table_ext)) 4394 { 4395 (*flaginfo->info->callbacks->einfo) 4396 (_("%P: %B: unexpected relocation type\n"), input_bfd); 4397 bfd_set_error (bfd_error_bad_value); 4398 return FALSE; 4399 } 4400 4401 if (relocatable) 4402 { 4403 /* We are generating a relocatable output file, and must 4404 modify the reloc accordingly. */ 4405 if (r_extern 4406 || r_type == (unsigned int) RELOC_BASE10 4407 || r_type == (unsigned int) RELOC_BASE13 4408 || r_type == (unsigned int) RELOC_BASE22) 4409 { 4410 /* If we know the symbol this relocation is against, 4411 convert it into a relocation against a section. This 4412 is what the native linker does. */ 4413 if (r_type == (unsigned int) RELOC_BASE10 4414 || r_type == (unsigned int) RELOC_BASE13 4415 || r_type == (unsigned int) RELOC_BASE22) 4416 h = NULL; 4417 else 4418 h = sym_hashes[r_index]; 4419 if (h != NULL 4420 && (h->root.type == bfd_link_hash_defined 4421 || h->root.type == bfd_link_hash_defweak)) 4422 { 4423 asection *output_section; 4424 4425 /* Change the r_extern value. */ 4426 if (bfd_header_big_endian (output_bfd)) 4427 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 4428 else 4429 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 4430 4431 /* Compute a new r_index. */ 4432 output_section = h->root.u.def.section->output_section; 4433 if (output_section == obj_textsec (output_bfd)) 4434 r_index = N_TEXT; 4435 else if (output_section == obj_datasec (output_bfd)) 4436 r_index = N_DATA; 4437 else if (output_section == obj_bsssec (output_bfd)) 4438 r_index = N_BSS; 4439 else 4440 r_index = N_ABS; 4441 4442 /* Add the symbol value and the section VMA to the 4443 addend. */ 4444 relocation = (h->root.u.def.value 4445 + output_section->vma 4446 + h->root.u.def.section->output_offset); 4447 4448 /* Now RELOCATION is the VMA of the final 4449 destination. If this is a PC relative reloc, 4450 then ADDEND is the negative of the source VMA. 4451 We want to set ADDEND to the difference between 4452 the destination VMA and the source VMA, which 4453 means we must adjust RELOCATION by the change in 4454 the source VMA. This is done below. */ 4455 } 4456 else 4457 { 4458 /* We must change r_index according to the symbol 4459 map. */ 4460 r_index = symbol_map[r_index]; 4461 4462 if (r_index == -1) 4463 { 4464 if (h != NULL) 4465 { 4466 /* We decided to strip this symbol, but it 4467 turns out that we can't. Note that we 4468 lose the other and desc information here. 4469 I don't think that will ever matter for a 4470 global symbol. */ 4471 if (h->indx < 0) 4472 { 4473 h->indx = -2; 4474 h->written = FALSE; 4475 if (!aout_link_write_other_symbol (&h->root.root, 4476 flaginfo)) 4477 return FALSE; 4478 } 4479 r_index = h->indx; 4480 } 4481 else 4482 { 4483 const char *name; 4484 4485 name = strings + GET_WORD (input_bfd, 4486 syms[r_index].e_strx); 4487 (*flaginfo->info->callbacks->unattached_reloc) 4488 (flaginfo->info, name, 4489 input_bfd, input_section, r_addr); 4490 r_index = 0; 4491 } 4492 } 4493 4494 relocation = 0; 4495 4496 /* If this is a PC relative reloc, then the addend 4497 is the negative of the source VMA. We must 4498 adjust it by the change in the source VMA. This 4499 is done below. */ 4500 } 4501 4502 /* Write out the new r_index value. */ 4503 if (bfd_header_big_endian (output_bfd)) 4504 { 4505 rel->r_index[0] = r_index >> 16; 4506 rel->r_index[1] = r_index >> 8; 4507 rel->r_index[2] = r_index; 4508 } 4509 else 4510 { 4511 rel->r_index[2] = r_index >> 16; 4512 rel->r_index[1] = r_index >> 8; 4513 rel->r_index[0] = r_index; 4514 } 4515 } 4516 else 4517 { 4518 /* This is a relocation against a section. We must 4519 adjust by the amount that the section moved. */ 4520 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4521 relocation = (r_section->output_section->vma 4522 + r_section->output_offset 4523 - r_section->vma); 4524 4525 /* If this is a PC relative reloc, then the addend is 4526 the difference in VMA between the destination and the 4527 source. We have just adjusted for the change in VMA 4528 of the destination, so we must also adjust by the 4529 change in VMA of the source. This is done below. */ 4530 } 4531 4532 /* As described above, we must always adjust a PC relative 4533 reloc by the change in VMA of the source. However, if 4534 pcrel_offset is set, then the addend does not include the 4535 location within the section, in which case we don't need 4536 to adjust anything. */ 4537 if (howto_table_ext[r_type].pc_relative 4538 && ! howto_table_ext[r_type].pcrel_offset) 4539 relocation -= (input_section->output_section->vma 4540 + input_section->output_offset 4541 - input_section->vma); 4542 4543 /* Change the addend if necessary. */ 4544 if (relocation != 0) 4545 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 4546 4547 /* Change the address of the relocation. */ 4548 PUT_WORD (output_bfd, 4549 r_addr + input_section->output_offset, 4550 rel->r_address); 4551 } 4552 else 4553 { 4554 bfd_boolean hundef; 4555 bfd_reloc_status_type r; 4556 4557 /* We are generating an executable, and must do a full 4558 relocation. */ 4559 hundef = FALSE; 4560 4561 if (r_extern) 4562 { 4563 h = sym_hashes[r_index]; 4564 4565 if (h != NULL 4566 && (h->root.type == bfd_link_hash_defined 4567 || h->root.type == bfd_link_hash_defweak)) 4568 { 4569 relocation = (h->root.u.def.value 4570 + h->root.u.def.section->output_section->vma 4571 + h->root.u.def.section->output_offset); 4572 } 4573 else if (h != NULL 4574 && h->root.type == bfd_link_hash_undefweak) 4575 relocation = 0; 4576 else 4577 { 4578 hundef = TRUE; 4579 relocation = 0; 4580 } 4581 } 4582 else if (r_type == (unsigned int) RELOC_BASE10 4583 || r_type == (unsigned int) RELOC_BASE13 4584 || r_type == (unsigned int) RELOC_BASE22) 4585 { 4586 struct external_nlist *sym; 4587 int type; 4588 4589 /* For base relative relocs, r_index is always an index 4590 into the symbol table, even if r_extern is 0. */ 4591 sym = syms + r_index; 4592 type = H_GET_8 (input_bfd, sym->e_type); 4593 if ((type & N_TYPE) == N_TEXT 4594 || type == N_WEAKT) 4595 r_section = obj_textsec (input_bfd); 4596 else if ((type & N_TYPE) == N_DATA 4597 || type == N_WEAKD) 4598 r_section = obj_datasec (input_bfd); 4599 else if ((type & N_TYPE) == N_BSS 4600 || type == N_WEAKB) 4601 r_section = obj_bsssec (input_bfd); 4602 else if ((type & N_TYPE) == N_ABS 4603 || type == N_WEAKA) 4604 r_section = bfd_abs_section_ptr; 4605 else 4606 abort (); 4607 relocation = (r_section->output_section->vma 4608 + r_section->output_offset 4609 + (GET_WORD (input_bfd, sym->e_value) 4610 - r_section->vma)); 4611 } 4612 else 4613 { 4614 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4615 4616 /* If this is a PC relative reloc, then R_ADDEND is the 4617 difference between the two vmas, or 4618 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 4619 where 4620 old_dest_sec == section->vma 4621 and 4622 old_src_sec == input_section->vma 4623 and 4624 old_src_off == r_addr 4625 4626 _bfd_final_link_relocate expects RELOCATION + 4627 R_ADDEND to be the VMA of the destination minus 4628 r_addr (the minus r_addr is because this relocation 4629 is not pcrel_offset, which is a bit confusing and 4630 should, perhaps, be changed), or 4631 new_dest_sec 4632 where 4633 new_dest_sec == output_section->vma + output_offset 4634 We arrange for this to happen by setting RELOCATION to 4635 new_dest_sec + old_src_sec - old_dest_sec 4636 4637 If this is not a PC relative reloc, then R_ADDEND is 4638 simply the VMA of the destination, so we set 4639 RELOCATION to the change in the destination VMA, or 4640 new_dest_sec - old_dest_sec 4641 */ 4642 relocation = (r_section->output_section->vma 4643 + r_section->output_offset 4644 - r_section->vma); 4645 if (howto_table_ext[r_type].pc_relative) 4646 relocation += input_section->vma; 4647 } 4648 4649 if (check_dynamic_reloc != NULL) 4650 { 4651 bfd_boolean skip; 4652 4653 if (! ((*check_dynamic_reloc) 4654 (flaginfo->info, input_bfd, input_section, h, 4655 (void *) rel, contents, &skip, &relocation))) 4656 return FALSE; 4657 if (skip) 4658 continue; 4659 } 4660 4661 /* Now warn if a global symbol is undefined. We could not 4662 do this earlier, because check_dynamic_reloc might want 4663 to skip this reloc. */ 4664 if (hundef 4665 && ! bfd_link_pic (flaginfo->info) 4666 && r_type != (unsigned int) RELOC_BASE10 4667 && r_type != (unsigned int) RELOC_BASE13 4668 && r_type != (unsigned int) RELOC_BASE22) 4669 { 4670 const char *name; 4671 4672 if (h != NULL) 4673 name = h->root.root.string; 4674 else 4675 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4676 (*flaginfo->info->callbacks->undefined_symbol) 4677 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE); 4678 } 4679 4680 if (r_type != (unsigned int) RELOC_SPARC_REV32) 4681 r = MY_final_link_relocate (howto_table_ext + r_type, 4682 input_bfd, input_section, 4683 contents, r_addr, relocation, 4684 r_addend); 4685 else 4686 { 4687 bfd_vma x; 4688 4689 x = bfd_get_32 (input_bfd, contents + r_addr); 4690 x = x + relocation + r_addend; 4691 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 4692 r = bfd_reloc_ok; 4693 } 4694 4695 if (r != bfd_reloc_ok) 4696 { 4697 switch (r) 4698 { 4699 default: 4700 case bfd_reloc_outofrange: 4701 abort (); 4702 case bfd_reloc_overflow: 4703 { 4704 const char *name; 4705 4706 if (h != NULL) 4707 name = NULL; 4708 else if (r_extern 4709 || r_type == (unsigned int) RELOC_BASE10 4710 || r_type == (unsigned int) RELOC_BASE13 4711 || r_type == (unsigned int) RELOC_BASE22) 4712 name = strings + GET_WORD (input_bfd, 4713 syms[r_index].e_strx); 4714 else 4715 { 4716 asection *s; 4717 4718 s = aout_reloc_index_to_section (input_bfd, r_index); 4719 name = bfd_section_name (input_bfd, s); 4720 } 4721 (*flaginfo->info->callbacks->reloc_overflow) 4722 (flaginfo->info, (h ? &h->root : NULL), name, 4723 howto_table_ext[r_type].name, 4724 r_addend, input_bfd, input_section, r_addr); 4725 } 4726 break; 4727 } 4728 } 4729 } 4730 } 4731 4732 return TRUE; 4733} 4734 4735/* Link an a.out section into the output file. */ 4736 4737static bfd_boolean 4738aout_link_input_section (struct aout_final_link_info *flaginfo, 4739 bfd *input_bfd, 4740 asection *input_section, 4741 file_ptr *reloff_ptr, 4742 bfd_size_type rel_size) 4743{ 4744 bfd_size_type input_size; 4745 void * relocs; 4746 4747 /* Get the section contents. */ 4748 input_size = input_section->size; 4749 if (! bfd_get_section_contents (input_bfd, input_section, 4750 (void *) flaginfo->contents, 4751 (file_ptr) 0, input_size)) 4752 return FALSE; 4753 4754 /* Read in the relocs if we haven't already done it. */ 4755 if (aout_section_data (input_section) != NULL 4756 && aout_section_data (input_section)->relocs != NULL) 4757 relocs = aout_section_data (input_section)->relocs; 4758 else 4759 { 4760 relocs = flaginfo->relocs; 4761 if (rel_size > 0) 4762 { 4763 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4764 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4765 return FALSE; 4766 } 4767 } 4768 4769 /* Relocate the section contents. */ 4770 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4771 { 4772 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section, 4773 (struct reloc_std_external *) relocs, 4774 rel_size, flaginfo->contents)) 4775 return FALSE; 4776 } 4777 else 4778 { 4779 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section, 4780 (struct reloc_ext_external *) relocs, 4781 rel_size, flaginfo->contents)) 4782 return FALSE; 4783 } 4784 4785 /* Write out the section contents. */ 4786 if (! bfd_set_section_contents (flaginfo->output_bfd, 4787 input_section->output_section, 4788 (void *) flaginfo->contents, 4789 (file_ptr) input_section->output_offset, 4790 input_size)) 4791 return FALSE; 4792 4793 /* If we are producing relocatable output, the relocs were 4794 modified, and we now write them out. */ 4795 if (bfd_link_relocatable (flaginfo->info) && rel_size > 0) 4796 { 4797 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4798 return FALSE; 4799 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size) 4800 return FALSE; 4801 *reloff_ptr += rel_size; 4802 4803 /* Assert that the relocs have not run into the symbols, and 4804 that if these are the text relocs they have not run into the 4805 data relocs. */ 4806 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 4807 && (reloff_ptr != &flaginfo->treloff 4808 || (*reloff_ptr 4809 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 4810 } 4811 4812 return TRUE; 4813} 4814 4815/* Adjust and write out the symbols for an a.out file. Set the new 4816 symbol indices into a symbol_map. */ 4817 4818static bfd_boolean 4819aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd) 4820{ 4821 bfd *output_bfd; 4822 bfd_size_type sym_count; 4823 char *strings; 4824 enum bfd_link_strip strip; 4825 enum bfd_link_discard discard; 4826 struct external_nlist *outsym; 4827 bfd_size_type strtab_index; 4828 struct external_nlist *sym; 4829 struct external_nlist *sym_end; 4830 struct aout_link_hash_entry **sym_hash; 4831 int *symbol_map; 4832 bfd_boolean pass; 4833 bfd_boolean skip_next; 4834 4835 output_bfd = flaginfo->output_bfd; 4836 sym_count = obj_aout_external_sym_count (input_bfd); 4837 strings = obj_aout_external_strings (input_bfd); 4838 strip = flaginfo->info->strip; 4839 discard = flaginfo->info->discard; 4840 outsym = flaginfo->output_syms; 4841 4842 /* First write out a symbol for this object file, unless we are 4843 discarding such symbols. */ 4844 if (strip != strip_all 4845 && (strip != strip_some 4846 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename, 4847 FALSE, FALSE) != NULL) 4848 && discard != discard_all) 4849 { 4850 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4851 H_PUT_8 (output_bfd, 0, outsym->e_other); 4852 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4853 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 4854 input_bfd->filename, FALSE); 4855 if (strtab_index == (bfd_size_type) -1) 4856 return FALSE; 4857 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4858 PUT_WORD (output_bfd, 4859 (bfd_get_section_vma (output_bfd, 4860 obj_textsec (input_bfd)->output_section) 4861 + obj_textsec (input_bfd)->output_offset), 4862 outsym->e_value); 4863 ++obj_aout_external_sym_count (output_bfd); 4864 ++outsym; 4865 } 4866 4867 pass = FALSE; 4868 skip_next = FALSE; 4869 sym = obj_aout_external_syms (input_bfd); 4870 sym_end = sym + sym_count; 4871 sym_hash = obj_aout_sym_hashes (input_bfd); 4872 symbol_map = flaginfo->symbol_map; 4873 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4874 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4875 { 4876 const char *name; 4877 int type; 4878 struct aout_link_hash_entry *h; 4879 bfd_boolean skip; 4880 asection *symsec; 4881 bfd_vma val = 0; 4882 bfd_boolean copy; 4883 4884 /* We set *symbol_map to 0 above for all symbols. If it has 4885 already been set to -1 for this symbol, it means that we are 4886 discarding it because it appears in a duplicate header file. 4887 See the N_BINCL code below. */ 4888 if (*symbol_map == -1) 4889 continue; 4890 4891 /* Initialize *symbol_map to -1, which means that the symbol was 4892 not copied into the output file. We will change it later if 4893 we do copy the symbol over. */ 4894 *symbol_map = -1; 4895 4896 type = H_GET_8 (input_bfd, sym->e_type); 4897 name = strings + GET_WORD (input_bfd, sym->e_strx); 4898 4899 h = NULL; 4900 4901 if (pass) 4902 { 4903 /* Pass this symbol through. It is the target of an 4904 indirect or warning symbol. */ 4905 val = GET_WORD (input_bfd, sym->e_value); 4906 pass = FALSE; 4907 } 4908 else if (skip_next) 4909 { 4910 /* Skip this symbol, which is the target of an indirect 4911 symbol that we have changed to no longer be an indirect 4912 symbol. */ 4913 skip_next = FALSE; 4914 continue; 4915 } 4916 else 4917 { 4918 struct aout_link_hash_entry *hresolve; 4919 4920 /* We have saved the hash table entry for this symbol, if 4921 there is one. Note that we could just look it up again 4922 in the hash table, provided we first check that it is an 4923 external symbol. */ 4924 h = *sym_hash; 4925 4926 /* Use the name from the hash table, in case the symbol was 4927 wrapped. */ 4928 if (h != NULL 4929 && h->root.type != bfd_link_hash_warning) 4930 name = h->root.root.string; 4931 4932 /* If this is an indirect or warning symbol, then change 4933 hresolve to the base symbol. We also change *sym_hash so 4934 that the relocation routines relocate against the real 4935 symbol. */ 4936 hresolve = h; 4937 if (h != (struct aout_link_hash_entry *) NULL 4938 && (h->root.type == bfd_link_hash_indirect 4939 || h->root.type == bfd_link_hash_warning)) 4940 { 4941 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4942 while (hresolve->root.type == bfd_link_hash_indirect 4943 || hresolve->root.type == bfd_link_hash_warning) 4944 hresolve = ((struct aout_link_hash_entry *) 4945 hresolve->root.u.i.link); 4946 *sym_hash = hresolve; 4947 } 4948 4949 /* If the symbol has already been written out, skip it. */ 4950 if (h != NULL 4951 && h->written) 4952 { 4953 if ((type & N_TYPE) == N_INDR 4954 || type == N_WARNING) 4955 skip_next = TRUE; 4956 *symbol_map = h->indx; 4957 continue; 4958 } 4959 4960 /* See if we are stripping this symbol. */ 4961 skip = FALSE; 4962 switch (strip) 4963 { 4964 case strip_none: 4965 break; 4966 case strip_debugger: 4967 if ((type & N_STAB) != 0) 4968 skip = TRUE; 4969 break; 4970 case strip_some: 4971 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE) 4972 == NULL) 4973 skip = TRUE; 4974 break; 4975 case strip_all: 4976 skip = TRUE; 4977 break; 4978 } 4979 if (skip) 4980 { 4981 if (h != NULL) 4982 h->written = TRUE; 4983 continue; 4984 } 4985 4986 /* Get the value of the symbol. */ 4987 if ((type & N_TYPE) == N_TEXT 4988 || type == N_WEAKT) 4989 symsec = obj_textsec (input_bfd); 4990 else if ((type & N_TYPE) == N_DATA 4991 || type == N_WEAKD) 4992 symsec = obj_datasec (input_bfd); 4993 else if ((type & N_TYPE) == N_BSS 4994 || type == N_WEAKB) 4995 symsec = obj_bsssec (input_bfd); 4996 else if ((type & N_TYPE) == N_ABS 4997 || type == N_WEAKA) 4998 symsec = bfd_abs_section_ptr; 4999 else if (((type & N_TYPE) == N_INDR 5000 && (hresolve == NULL 5001 || (hresolve->root.type != bfd_link_hash_defined 5002 && hresolve->root.type != bfd_link_hash_defweak 5003 && hresolve->root.type != bfd_link_hash_common))) 5004 || type == N_WARNING) 5005 { 5006 /* Pass the next symbol through unchanged. The 5007 condition above for indirect symbols is so that if 5008 the indirect symbol was defined, we output it with 5009 the correct definition so the debugger will 5010 understand it. */ 5011 pass = TRUE; 5012 val = GET_WORD (input_bfd, sym->e_value); 5013 symsec = NULL; 5014 } 5015 else if ((type & N_STAB) != 0) 5016 { 5017 val = GET_WORD (input_bfd, sym->e_value); 5018 symsec = NULL; 5019 } 5020 else 5021 { 5022 /* If we get here with an indirect symbol, it means that 5023 we are outputting it with a real definition. In such 5024 a case we do not want to output the next symbol, 5025 which is the target of the indirection. */ 5026 if ((type & N_TYPE) == N_INDR) 5027 skip_next = TRUE; 5028 5029 symsec = NULL; 5030 5031 /* We need to get the value from the hash table. We use 5032 hresolve so that if we have defined an indirect 5033 symbol we output the final definition. */ 5034 if (h == NULL) 5035 { 5036 switch (type & N_TYPE) 5037 { 5038 case N_SETT: 5039 symsec = obj_textsec (input_bfd); 5040 break; 5041 case N_SETD: 5042 symsec = obj_datasec (input_bfd); 5043 break; 5044 case N_SETB: 5045 symsec = obj_bsssec (input_bfd); 5046 break; 5047 case N_SETA: 5048 symsec = bfd_abs_section_ptr; 5049 break; 5050 default: 5051 val = 0; 5052 break; 5053 } 5054 } 5055 else if (hresolve->root.type == bfd_link_hash_defined 5056 || hresolve->root.type == bfd_link_hash_defweak) 5057 { 5058 asection *input_section; 5059 asection *output_section; 5060 5061 /* This case usually means a common symbol which was 5062 turned into a defined symbol. */ 5063 input_section = hresolve->root.u.def.section; 5064 output_section = input_section->output_section; 5065 BFD_ASSERT (bfd_is_abs_section (output_section) 5066 || output_section->owner == output_bfd); 5067 val = (hresolve->root.u.def.value 5068 + bfd_get_section_vma (output_bfd, output_section) 5069 + input_section->output_offset); 5070 5071 /* Get the correct type based on the section. If 5072 this is a constructed set, force it to be 5073 globally visible. */ 5074 if (type == N_SETT 5075 || type == N_SETD 5076 || type == N_SETB 5077 || type == N_SETA) 5078 type |= N_EXT; 5079 5080 type &=~ N_TYPE; 5081 5082 if (output_section == obj_textsec (output_bfd)) 5083 type |= (hresolve->root.type == bfd_link_hash_defined 5084 ? N_TEXT 5085 : N_WEAKT); 5086 else if (output_section == obj_datasec (output_bfd)) 5087 type |= (hresolve->root.type == bfd_link_hash_defined 5088 ? N_DATA 5089 : N_WEAKD); 5090 else if (output_section == obj_bsssec (output_bfd)) 5091 type |= (hresolve->root.type == bfd_link_hash_defined 5092 ? N_BSS 5093 : N_WEAKB); 5094 else 5095 type |= (hresolve->root.type == bfd_link_hash_defined 5096 ? N_ABS 5097 : N_WEAKA); 5098 } 5099 else if (hresolve->root.type == bfd_link_hash_common) 5100 val = hresolve->root.u.c.size; 5101 else if (hresolve->root.type == bfd_link_hash_undefweak) 5102 { 5103 val = 0; 5104 type = N_WEAKU; 5105 } 5106 else 5107 val = 0; 5108 } 5109 if (symsec != NULL) 5110 val = (symsec->output_section->vma 5111 + symsec->output_offset 5112 + (GET_WORD (input_bfd, sym->e_value) 5113 - symsec->vma)); 5114 5115 /* If this is a global symbol set the written flag, and if 5116 it is a local symbol see if we should discard it. */ 5117 if (h != NULL) 5118 { 5119 h->written = TRUE; 5120 h->indx = obj_aout_external_sym_count (output_bfd); 5121 } 5122 else if ((type & N_TYPE) != N_SETT 5123 && (type & N_TYPE) != N_SETD 5124 && (type & N_TYPE) != N_SETB 5125 && (type & N_TYPE) != N_SETA) 5126 { 5127 switch (discard) 5128 { 5129 case discard_none: 5130 case discard_sec_merge: 5131 break; 5132 case discard_l: 5133 if ((type & N_STAB) == 0 5134 && bfd_is_local_label_name (input_bfd, name)) 5135 skip = TRUE; 5136 break; 5137 case discard_all: 5138 skip = TRUE; 5139 break; 5140 } 5141 if (skip) 5142 { 5143 pass = FALSE; 5144 continue; 5145 } 5146 } 5147 5148 /* An N_BINCL symbol indicates the start of the stabs 5149 entries for a header file. We need to scan ahead to the 5150 next N_EINCL symbol, ignoring nesting, adding up all the 5151 characters in the symbol names, not including the file 5152 numbers in types (the first number after an open 5153 parenthesis). */ 5154 if (type == (int) N_BINCL) 5155 { 5156 struct external_nlist *incl_sym; 5157 int nest; 5158 struct aout_link_includes_entry *incl_entry; 5159 struct aout_link_includes_totals *t; 5160 5161 val = 0; 5162 nest = 0; 5163 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 5164 { 5165 int incl_type; 5166 5167 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5168 if (incl_type == (int) N_EINCL) 5169 { 5170 if (nest == 0) 5171 break; 5172 --nest; 5173 } 5174 else if (incl_type == (int) N_BINCL) 5175 ++nest; 5176 else if (nest == 0) 5177 { 5178 const char *s; 5179 5180 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 5181 for (; *s != '\0'; s++) 5182 { 5183 val += *s; 5184 if (*s == '(') 5185 { 5186 /* Skip the file number. */ 5187 ++s; 5188 while (ISDIGIT (*s)) 5189 ++s; 5190 --s; 5191 } 5192 } 5193 } 5194 } 5195 5196 /* If we have already included a header file with the 5197 same value, then replace this one with an N_EXCL 5198 symbol. */ 5199 copy = (bfd_boolean) (! flaginfo->info->keep_memory); 5200 incl_entry = aout_link_includes_lookup (&flaginfo->includes, 5201 name, TRUE, copy); 5202 if (incl_entry == NULL) 5203 return FALSE; 5204 for (t = incl_entry->totals; t != NULL; t = t->next) 5205 if (t->total == val) 5206 break; 5207 if (t == NULL) 5208 { 5209 /* This is the first time we have seen this header 5210 file with this set of stabs strings. */ 5211 t = (struct aout_link_includes_totals *) 5212 bfd_hash_allocate (&flaginfo->includes.root, 5213 sizeof *t); 5214 if (t == NULL) 5215 return FALSE; 5216 t->total = val; 5217 t->next = incl_entry->totals; 5218 incl_entry->totals = t; 5219 } 5220 else 5221 { 5222 int *incl_map; 5223 5224 /* This is a duplicate header file. We must change 5225 it to be an N_EXCL entry, and mark all the 5226 included symbols to prevent outputting them. */ 5227 type = (int) N_EXCL; 5228 5229 nest = 0; 5230 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 5231 incl_sym < sym_end; 5232 incl_sym++, incl_map++) 5233 { 5234 int incl_type; 5235 5236 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5237 if (incl_type == (int) N_EINCL) 5238 { 5239 if (nest == 0) 5240 { 5241 *incl_map = -1; 5242 break; 5243 } 5244 --nest; 5245 } 5246 else if (incl_type == (int) N_BINCL) 5247 ++nest; 5248 else if (nest == 0) 5249 *incl_map = -1; 5250 } 5251 } 5252 } 5253 } 5254 5255 /* Copy this symbol into the list of symbols we are going to 5256 write out. */ 5257 H_PUT_8 (output_bfd, type, outsym->e_type); 5258 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 5259 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 5260 copy = FALSE; 5261 if (! flaginfo->info->keep_memory) 5262 { 5263 /* name points into a string table which we are going to 5264 free. If there is a hash table entry, use that string. 5265 Otherwise, copy name into memory. */ 5266 if (h != NULL) 5267 name = h->root.root.string; 5268 else 5269 copy = TRUE; 5270 } 5271 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 5272 name, copy); 5273 if (strtab_index == (bfd_size_type) -1) 5274 return FALSE; 5275 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 5276 PUT_WORD (output_bfd, val, outsym->e_value); 5277 *symbol_map = obj_aout_external_sym_count (output_bfd); 5278 ++obj_aout_external_sym_count (output_bfd); 5279 ++outsym; 5280 } 5281 5282 /* Write out the output symbols we have just constructed. */ 5283 if (outsym > flaginfo->output_syms) 5284 { 5285 bfd_size_type outsym_size; 5286 5287 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0) 5288 return FALSE; 5289 outsym_size = outsym - flaginfo->output_syms; 5290 outsym_size *= EXTERNAL_NLIST_SIZE; 5291 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd) 5292 != outsym_size) 5293 return FALSE; 5294 flaginfo->symoff += outsym_size; 5295 } 5296 5297 return TRUE; 5298} 5299 5300/* Link an a.out input BFD into the output file. */ 5301 5302static bfd_boolean 5303aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd) 5304{ 5305 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 5306 5307 /* If this is a dynamic object, it may need special handling. */ 5308 if ((input_bfd->flags & DYNAMIC) != 0 5309 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 5310 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 5311 (flaginfo->info, input_bfd)); 5312 5313 /* Get the symbols. We probably have them already, unless 5314 flaginfo->info->keep_memory is FALSE. */ 5315 if (! aout_get_external_symbols (input_bfd)) 5316 return FALSE; 5317 5318 /* Write out the symbols and get a map of the new indices. The map 5319 is placed into flaginfo->symbol_map. */ 5320 if (! aout_link_write_symbols (flaginfo, input_bfd)) 5321 return FALSE; 5322 5323 /* Relocate and write out the sections. These functions use the 5324 symbol map created by aout_link_write_symbols. The linker_mark 5325 field will be set if these sections are to be included in the 5326 link, which will normally be the case. */ 5327 if (obj_textsec (input_bfd)->linker_mark) 5328 { 5329 if (! aout_link_input_section (flaginfo, input_bfd, 5330 obj_textsec (input_bfd), 5331 &flaginfo->treloff, 5332 exec_hdr (input_bfd)->a_trsize)) 5333 return FALSE; 5334 } 5335 if (obj_datasec (input_bfd)->linker_mark) 5336 { 5337 if (! aout_link_input_section (flaginfo, input_bfd, 5338 obj_datasec (input_bfd), 5339 &flaginfo->dreloff, 5340 exec_hdr (input_bfd)->a_drsize)) 5341 return FALSE; 5342 } 5343 5344 /* If we are not keeping memory, we don't need the symbols any 5345 longer. We still need them if we are keeping memory, because the 5346 strings in the hash table point into them. */ 5347 if (! flaginfo->info->keep_memory) 5348 { 5349 if (! aout_link_free_symbols (input_bfd)) 5350 return FALSE; 5351 } 5352 5353 return TRUE; 5354} 5355 5356/* Do the final link step. This is called on the output BFD. The 5357 INFO structure should point to a list of BFDs linked through the 5358 link.next field which can be used to find each BFD which takes part 5359 in the output. Also, each section in ABFD should point to a list 5360 of bfd_link_order structures which list all the input sections for 5361 the output section. */ 5362 5363bfd_boolean 5364NAME (aout, final_link) (bfd *abfd, 5365 struct bfd_link_info *info, 5366 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) 5367{ 5368 struct aout_final_link_info aout_info; 5369 bfd_boolean includes_hash_initialized = FALSE; 5370 bfd *sub; 5371 bfd_size_type trsize, drsize; 5372 bfd_size_type max_contents_size; 5373 bfd_size_type max_relocs_size; 5374 bfd_size_type max_sym_count; 5375 struct bfd_link_order *p; 5376 asection *o; 5377 bfd_boolean have_link_order_relocs; 5378 5379 if (bfd_link_pic (info)) 5380 abfd->flags |= DYNAMIC; 5381 5382 aout_info.info = info; 5383 aout_info.output_bfd = abfd; 5384 aout_info.contents = NULL; 5385 aout_info.relocs = NULL; 5386 aout_info.symbol_map = NULL; 5387 aout_info.output_syms = NULL; 5388 5389 if (!bfd_hash_table_init_n (&aout_info.includes.root, 5390 aout_link_includes_newfunc, 5391 sizeof (struct aout_link_includes_entry), 5392 251)) 5393 goto error_return; 5394 includes_hash_initialized = TRUE; 5395 5396 /* Figure out the largest section size. Also, if generating 5397 relocatable output, count the relocs. */ 5398 trsize = 0; 5399 drsize = 0; 5400 max_contents_size = 0; 5401 max_relocs_size = 0; 5402 max_sym_count = 0; 5403 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5404 { 5405 bfd_size_type sz; 5406 5407 if (bfd_link_relocatable (info)) 5408 { 5409 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5410 { 5411 trsize += exec_hdr (sub)->a_trsize; 5412 drsize += exec_hdr (sub)->a_drsize; 5413 } 5414 else 5415 { 5416 /* FIXME: We need to identify the .text and .data sections 5417 and call get_reloc_upper_bound and canonicalize_reloc to 5418 work out the number of relocs needed, and then multiply 5419 by the reloc size. */ 5420 _bfd_error_handler 5421 /* xgettext:c-format */ 5422 (_("%s: relocatable link from %s to %s not supported"), 5423 bfd_get_filename (abfd), 5424 sub->xvec->name, abfd->xvec->name); 5425 bfd_set_error (bfd_error_invalid_operation); 5426 goto error_return; 5427 } 5428 } 5429 5430 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5431 { 5432 sz = obj_textsec (sub)->size; 5433 if (sz > max_contents_size) 5434 max_contents_size = sz; 5435 sz = obj_datasec (sub)->size; 5436 if (sz > max_contents_size) 5437 max_contents_size = sz; 5438 5439 sz = exec_hdr (sub)->a_trsize; 5440 if (sz > max_relocs_size) 5441 max_relocs_size = sz; 5442 sz = exec_hdr (sub)->a_drsize; 5443 if (sz > max_relocs_size) 5444 max_relocs_size = sz; 5445 5446 sz = obj_aout_external_sym_count (sub); 5447 if (sz > max_sym_count) 5448 max_sym_count = sz; 5449 } 5450 } 5451 5452 if (bfd_link_relocatable (info)) 5453 { 5454 if (obj_textsec (abfd) != NULL) 5455 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 5456 ->map_head.link_order) 5457 * obj_reloc_entry_size (abfd)); 5458 if (obj_datasec (abfd) != NULL) 5459 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 5460 ->map_head.link_order) 5461 * obj_reloc_entry_size (abfd)); 5462 } 5463 5464 exec_hdr (abfd)->a_trsize = trsize; 5465 exec_hdr (abfd)->a_drsize = drsize; 5466 5467 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 5468 5469 /* Adjust the section sizes and vmas according to the magic number. 5470 This sets a_text, a_data and a_bss in the exec_hdr and sets the 5471 filepos for each section. */ 5472 if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) 5473 goto error_return; 5474 5475 /* The relocation and symbol file positions differ among a.out 5476 targets. We are passed a callback routine from the backend 5477 specific code to handle this. 5478 FIXME: At this point we do not know how much space the symbol 5479 table will require. This will not work for any (nonstandard) 5480 a.out target that needs to know the symbol table size before it 5481 can compute the relocation file positions. This may or may not 5482 be the case for the hp300hpux target, for example. */ 5483 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 5484 &aout_info.symoff); 5485 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 5486 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 5487 obj_sym_filepos (abfd) = aout_info.symoff; 5488 5489 /* We keep a count of the symbols as we output them. */ 5490 obj_aout_external_sym_count (abfd) = 0; 5491 5492 /* We accumulate the string table as we write out the symbols. */ 5493 aout_info.strtab = _bfd_stringtab_init (); 5494 if (aout_info.strtab == NULL) 5495 goto error_return; 5496 5497 /* Allocate buffers to hold section contents and relocs. */ 5498 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); 5499 aout_info.relocs = bfd_malloc (max_relocs_size); 5500 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int)); 5501 aout_info.output_syms = (struct external_nlist *) 5502 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist)); 5503 if ((aout_info.contents == NULL && max_contents_size != 0) 5504 || (aout_info.relocs == NULL && max_relocs_size != 0) 5505 || (aout_info.symbol_map == NULL && max_sym_count != 0) 5506 || aout_info.output_syms == NULL) 5507 goto error_return; 5508 5509 /* If we have a symbol named __DYNAMIC, force it out now. This is 5510 required by SunOS. Doing this here rather than in sunos.c is a 5511 hack, but it's easier than exporting everything which would be 5512 needed. */ 5513 { 5514 struct aout_link_hash_entry *h; 5515 5516 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 5517 FALSE, FALSE, FALSE); 5518 if (h != NULL) 5519 aout_link_write_other_symbol (&h->root.root, &aout_info); 5520 } 5521 5522 /* The most time efficient way to do the link would be to read all 5523 the input object files into memory and then sort out the 5524 information into the output file. Unfortunately, that will 5525 probably use too much memory. Another method would be to step 5526 through everything that composes the text section and write it 5527 out, and then everything that composes the data section and write 5528 it out, and then write out the relocs, and then write out the 5529 symbols. Unfortunately, that requires reading stuff from each 5530 input file several times, and we will not be able to keep all the 5531 input files open simultaneously, and reopening them will be slow. 5532 5533 What we do is basically process one input file at a time. We do 5534 everything we need to do with an input file once--copy over the 5535 section contents, handle the relocation information, and write 5536 out the symbols--and then we throw away the information we read 5537 from it. This approach requires a lot of lseeks of the output 5538 file, which is unfortunate but still faster than reopening a lot 5539 of files. 5540 5541 We use the output_has_begun field of the input BFDs to see 5542 whether we have already handled it. */ 5543 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5544 sub->output_has_begun = FALSE; 5545 5546 /* Mark all sections which are to be included in the link. This 5547 will normally be every section. We need to do this so that we 5548 can identify any sections which the linker has decided to not 5549 include. */ 5550 for (o = abfd->sections; o != NULL; o = o->next) 5551 { 5552 for (p = o->map_head.link_order; p != NULL; p = p->next) 5553 if (p->type == bfd_indirect_link_order) 5554 p->u.indirect.section->linker_mark = TRUE; 5555 } 5556 5557 have_link_order_relocs = FALSE; 5558 for (o = abfd->sections; o != NULL; o = o->next) 5559 { 5560 for (p = o->map_head.link_order; 5561 p != NULL; 5562 p = p->next) 5563 { 5564 if (p->type == bfd_indirect_link_order 5565 && (bfd_get_flavour (p->u.indirect.section->owner) 5566 == bfd_target_aout_flavour)) 5567 { 5568 bfd *input_bfd; 5569 5570 input_bfd = p->u.indirect.section->owner; 5571 if (! input_bfd->output_has_begun) 5572 { 5573 if (! aout_link_input_bfd (&aout_info, input_bfd)) 5574 goto error_return; 5575 input_bfd->output_has_begun = TRUE; 5576 } 5577 } 5578 else if (p->type == bfd_section_reloc_link_order 5579 || p->type == bfd_symbol_reloc_link_order) 5580 { 5581 /* These are handled below. */ 5582 have_link_order_relocs = TRUE; 5583 } 5584 else 5585 { 5586 if (! _bfd_default_link_order (abfd, info, o, p)) 5587 goto error_return; 5588 } 5589 } 5590 } 5591 5592 /* Write out any symbols that we have not already written out. */ 5593 bfd_hash_traverse (&info->hash->table, 5594 aout_link_write_other_symbol, 5595 &aout_info); 5596 5597 /* Now handle any relocs we were asked to create by the linker. 5598 These did not come from any input file. We must do these after 5599 we have written out all the symbols, so that we know the symbol 5600 indices to use. */ 5601 if (have_link_order_relocs) 5602 { 5603 for (o = abfd->sections; o != NULL; o = o->next) 5604 { 5605 for (p = o->map_head.link_order; 5606 p != NULL; 5607 p = p->next) 5608 { 5609 if (p->type == bfd_section_reloc_link_order 5610 || p->type == bfd_symbol_reloc_link_order) 5611 { 5612 if (! aout_link_reloc_link_order (&aout_info, o, p)) 5613 goto error_return; 5614 } 5615 } 5616 } 5617 } 5618 5619 if (aout_info.contents != NULL) 5620 { 5621 free (aout_info.contents); 5622 aout_info.contents = NULL; 5623 } 5624 if (aout_info.relocs != NULL) 5625 { 5626 free (aout_info.relocs); 5627 aout_info.relocs = NULL; 5628 } 5629 if (aout_info.symbol_map != NULL) 5630 { 5631 free (aout_info.symbol_map); 5632 aout_info.symbol_map = NULL; 5633 } 5634 if (aout_info.output_syms != NULL) 5635 { 5636 free (aout_info.output_syms); 5637 aout_info.output_syms = NULL; 5638 } 5639 if (includes_hash_initialized) 5640 { 5641 bfd_hash_table_free (&aout_info.includes.root); 5642 includes_hash_initialized = FALSE; 5643 } 5644 5645 /* Finish up any dynamic linking we may be doing. */ 5646 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 5647 { 5648 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 5649 goto error_return; 5650 } 5651 5652 /* Update the header information. */ 5653 abfd->symcount = obj_aout_external_sym_count (abfd); 5654 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 5655 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 5656 obj_textsec (abfd)->reloc_count = 5657 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 5658 obj_datasec (abfd)->reloc_count = 5659 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 5660 5661 /* Write out the string table, unless there are no symbols. */ 5662 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0) 5663 goto error_return; 5664 if (abfd->symcount > 0) 5665 { 5666 if (!emit_stringtab (abfd, aout_info.strtab)) 5667 goto error_return; 5668 } 5669 else 5670 { 5671 bfd_byte b[BYTES_IN_WORD]; 5672 5673 memset (b, 0, BYTES_IN_WORD); 5674 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD) 5675 goto error_return; 5676 } 5677 5678 return TRUE; 5679 5680 error_return: 5681 if (aout_info.contents != NULL) 5682 free (aout_info.contents); 5683 if (aout_info.relocs != NULL) 5684 free (aout_info.relocs); 5685 if (aout_info.symbol_map != NULL) 5686 free (aout_info.symbol_map); 5687 if (aout_info.output_syms != NULL) 5688 free (aout_info.output_syms); 5689 if (includes_hash_initialized) 5690 bfd_hash_table_free (&aout_info.includes.root); 5691 return FALSE; 5692} 5693