1/* BFD semi-generic back-end for a.out binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23/* 24SECTION 25 a.out backends 26 27DESCRIPTION 28 29 BFD supports a number of different flavours of a.out format, 30 though the major differences are only the sizes of the 31 structures on disk, and the shape of the relocation 32 information. 33 34 The support is split into a basic support file @file{aoutx.h} 35 and other files which derive functions from the base. One 36 derivation file is @file{aoutf1.h} (for a.out flavour 1), and 37 adds to the basic a.out functions support for sun3, sun4, 386 38 and 29k a.out files, to create a target jump vector for a 39 specific target. 40 41 This information is further split out into more specific files 42 for each machine, including @file{sunos.c} for sun3 and sun4, 43 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a 44 demonstration of a 64 bit a.out format. 45 46 The base file @file{aoutx.h} defines general mechanisms for 47 reading and writing records to and from disk and various 48 other methods which BFD requires. It is included by 49 @file{aout32.c} and @file{aout64.c} to form the names 50 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. 51 52 As an example, this is what goes on to make the back end for a 53 sun4, from @file{aout32.c}: 54 55| #define ARCH_SIZE 32 56| #include "aoutx.h" 57 58 Which exports names: 59 60| ... 61| aout_32_canonicalize_reloc 62| aout_32_find_nearest_line 63| aout_32_get_lineno 64| aout_32_get_reloc_upper_bound 65| ... 66 67 from @file{sunos.c}: 68 69| #define TARGET_NAME "a.out-sunos-big" 70| #define VECNAME sunos_big_vec 71| #include "aoutf1.h" 72 73 requires all the names from @file{aout32.c}, and produces the jump vector 74 75| sunos_big_vec 76 77 The file @file{host-aout.c} is a special case. It is for a large set 78 of hosts that use ``more or less standard'' a.out files, and 79 for which cross-debugging is not interesting. It uses the 80 standard 32-bit a.out support routines, but determines the 81 file offsets and addresses of the text, data, and BSS 82 sections, the machine architecture and machine type, and the 83 entry point address, in a host-dependent manner. Once these 84 values have been determined, generic code is used to handle 85 the object file. 86 87 When porting it to run on a new system, you must supply: 88 89| HOST_PAGE_SIZE 90| HOST_SEGMENT_SIZE 91| HOST_MACHINE_ARCH (optional) 92| HOST_MACHINE_MACHINE (optional) 93| HOST_TEXT_START_ADDR 94| HOST_STACK_END_ADDR 95 96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These 97 values, plus the structures and macros defined in @file{a.out.h} on 98 your host system, will produce a BFD target that will access 99 ordinary a.out files on your host. To configure a new machine 100 to use @file{host-aout.c}, specify: 101 102| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec 103| TDEPFILES= host-aout.o trad-core.o 104 105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in} 106 to use the 107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your 108 configuration is selected. */ 109 110/* Some assumptions: 111 * Any BFD with D_PAGED set is ZMAGIC, and vice versa. 112 Doesn't matter what the setting of WP_TEXT is on output, but it'll 113 get set on input. 114 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. 115 * Any BFD with both flags clear is OMAGIC. 116 (Just want to make these explicit, so the conditions tested in this 117 file make sense if you're more familiar with a.out than with BFD.) */ 118 119#define KEEPIT udata.i 120 121#include "sysdep.h" 122#include "bfd.h" 123#include "safe-ctype.h" 124#include "bfdlink.h" 125 126#include "libaout.h" 127#include "libbfd.h" 128#include "aout/aout64.h" 129#include "aout/stab_gnu.h" 130#include "aout/ar.h" 131 132/* 133SUBSECTION 134 Relocations 135 136DESCRIPTION 137 The file @file{aoutx.h} provides for both the @emph{standard} 138 and @emph{extended} forms of a.out relocation records. 139 140 The standard records contain only an 141 address, a symbol index, and a type field. The extended records 142 (used on 29ks and sparcs) also have a full integer for an 143 addend. */ 144 145#ifndef CTOR_TABLE_RELOC_HOWTO 146#define CTOR_TABLE_RELOC_IDX 2 147#define CTOR_TABLE_RELOC_HOWTO(BFD) \ 148 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \ 149 ? howto_table_ext : howto_table_std) \ 150 + CTOR_TABLE_RELOC_IDX) 151#endif 152 153#ifndef MY_swap_std_reloc_in 154#define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in) 155#endif 156 157#ifndef MY_swap_ext_reloc_in 158#define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in) 159#endif 160 161#ifndef MY_swap_std_reloc_out 162#define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out) 163#endif 164 165#ifndef MY_swap_ext_reloc_out 166#define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out) 167#endif 168 169#ifndef MY_final_link_relocate 170#define MY_final_link_relocate _bfd_final_link_relocate 171#endif 172 173#ifndef MY_relocate_contents 174#define MY_relocate_contents _bfd_relocate_contents 175#endif 176 177#define howto_table_ext NAME (aout, ext_howto_table) 178#define howto_table_std NAME (aout, std_howto_table) 179 180reloc_howto_type howto_table_ext[] = 181{ 182 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 183 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE), 184 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE), 185 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE), 186 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE), 187 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE), 188 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE), 189 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE), 190 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE), 191 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE), 192 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE), 193 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE), 194 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE), 195 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE), 196 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE), 197 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE), 198 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE), 199 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE), 200 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE), 201 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE), 202 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE), 203 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE), 204 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE), 205 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE), 206 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE), 207 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 209#define RELOC_SPARC_REV32 RELOC_WDISP19 210 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE), 211}; 212 213/* Convert standard reloc records to "arelent" format (incl byte swap). */ 214 215reloc_howto_type howto_table_std[] = 216{ 217 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 218HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), 219HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 220HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), 221HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE), 222HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), 223HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 224HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), 225HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE), 226HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE), 227HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE), 228HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE), 229EMPTY_HOWTO (-1), 230EMPTY_HOWTO (-1), 231EMPTY_HOWTO (-1), 232EMPTY_HOWTO (-1), 233EMPTY_HOWTO (-1), 234 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE), 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), 249EMPTY_HOWTO (-1), 250 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE), 251EMPTY_HOWTO (-1), 252EMPTY_HOWTO (-1), 253EMPTY_HOWTO (-1), 254EMPTY_HOWTO (-1), 255EMPTY_HOWTO (-1), 256EMPTY_HOWTO (-1), 257EMPTY_HOWTO (-1), 258 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE), 259}; 260 261#define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0])) 262 263reloc_howto_type * 264NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) 265{ 266#define EXT(i, j) case i: return & howto_table_ext [j] 267#define STD(i, j) case i: return & howto_table_std [j] 268 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 269 270 if (code == BFD_RELOC_CTOR) 271 switch (bfd_get_arch_info (abfd)->bits_per_address) 272 { 273 case 32: 274 code = BFD_RELOC_32; 275 break; 276 case 64: 277 code = BFD_RELOC_64; 278 break; 279 } 280 281 if (ext) 282 switch (code) 283 { 284 EXT (BFD_RELOC_8, 0); 285 EXT (BFD_RELOC_16, 1); 286 EXT (BFD_RELOC_32, 2); 287 EXT (BFD_RELOC_HI22, 8); 288 EXT (BFD_RELOC_LO10, 11); 289 EXT (BFD_RELOC_32_PCREL_S2, 6); 290 EXT (BFD_RELOC_SPARC_WDISP22, 7); 291 EXT (BFD_RELOC_SPARC13, 10); 292 EXT (BFD_RELOC_SPARC_GOT10, 14); 293 EXT (BFD_RELOC_SPARC_BASE13, 15); 294 EXT (BFD_RELOC_SPARC_GOT13, 15); 295 EXT (BFD_RELOC_SPARC_GOT22, 16); 296 EXT (BFD_RELOC_SPARC_PC10, 17); 297 EXT (BFD_RELOC_SPARC_PC22, 18); 298 EXT (BFD_RELOC_SPARC_WPLT30, 19); 299 EXT (BFD_RELOC_SPARC_REV32, 26); 300 default: 301 return NULL; 302 } 303 else 304 /* std relocs. */ 305 switch (code) 306 { 307 STD (BFD_RELOC_8, 0); 308 STD (BFD_RELOC_16, 1); 309 STD (BFD_RELOC_32, 2); 310 STD (BFD_RELOC_8_PCREL, 4); 311 STD (BFD_RELOC_16_PCREL, 5); 312 STD (BFD_RELOC_32_PCREL, 6); 313 STD (BFD_RELOC_16_BASEREL, 9); 314 STD (BFD_RELOC_32_BASEREL, 10); 315 default: 316 return NULL; 317 } 318} 319 320reloc_howto_type * 321NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name) 322{ 323 unsigned int i, size; 324 reloc_howto_type *howto_table; 325 326 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE) 327 { 328 howto_table = howto_table_ext; 329 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]); 330 } 331 else 332 { 333 howto_table = howto_table_std; 334 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]); 335 } 336 337 for (i = 0; i < size; i++) 338 if (howto_table[i].name != NULL 339 && strcasecmp (howto_table[i].name, r_name) == 0) 340 return &howto_table[i]; 341 342 return NULL; 343} 344 345/* 346SUBSECTION 347 Internal entry points 348 349DESCRIPTION 350 @file{aoutx.h} exports several routines for accessing the 351 contents of an a.out file, which are gathered and exported in 352 turn by various format specific files (eg sunos.c). 353*/ 354 355/* 356FUNCTION 357 aout_@var{size}_swap_exec_header_in 358 359SYNOPSIS 360 void aout_@var{size}_swap_exec_header_in, 361 (bfd *abfd, 362 struct external_exec *bytes, 363 struct internal_exec *execp); 364 365DESCRIPTION 366 Swap the information in an executable header @var{raw_bytes} taken 367 from a raw byte stream memory image into the internal exec header 368 structure @var{execp}. 369*/ 370 371#ifndef NAME_swap_exec_header_in 372void 373NAME (aout, swap_exec_header_in) (bfd *abfd, 374 struct external_exec *bytes, 375 struct internal_exec *execp) 376{ 377 /* The internal_exec structure has some fields that are unused in this 378 configuration (IE for i960), so ensure that all such uninitialized 379 fields are zero'd out. There are places where two of these structs 380 are memcmp'd, and thus the contents do matter. */ 381 memset ((void *) execp, 0, sizeof (struct internal_exec)); 382 /* Now fill in fields in the execp, from the bytes in the raw data. */ 383 execp->a_info = H_GET_32 (abfd, bytes->e_info); 384 execp->a_text = GET_WORD (abfd, bytes->e_text); 385 execp->a_data = GET_WORD (abfd, bytes->e_data); 386 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 387 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 388 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 389 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 390 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 391} 392#define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) 393#endif 394 395/* 396FUNCTION 397 aout_@var{size}_swap_exec_header_out 398 399SYNOPSIS 400 void aout_@var{size}_swap_exec_header_out 401 (bfd *abfd, 402 struct internal_exec *execp, 403 struct external_exec *raw_bytes); 404 405DESCRIPTION 406 Swap the information in an internal exec header structure 407 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 408*/ 409void 410NAME (aout, swap_exec_header_out) (bfd *abfd, 411 struct internal_exec *execp, 412 struct external_exec *bytes) 413{ 414 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 415 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 416 PUT_WORD (abfd, execp->a_text , bytes->e_text); 417 PUT_WORD (abfd, execp->a_data , bytes->e_data); 418 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 419 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 420 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 421 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 422 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 423} 424 425/* Make all the section for an a.out file. */ 426 427bfd_boolean 428NAME (aout, make_sections) (bfd *abfd) 429{ 430 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) 431 return FALSE; 432 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) 433 return FALSE; 434 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) 435 return FALSE; 436 return TRUE; 437} 438 439/* 440FUNCTION 441 aout_@var{size}_some_aout_object_p 442 443SYNOPSIS 444 const bfd_target *aout_@var{size}_some_aout_object_p 445 (bfd *abfd, 446 struct internal_exec *execp, 447 const bfd_target *(*callback_to_real_object_p) (bfd *)); 448 449DESCRIPTION 450 Some a.out variant thinks that the file open in @var{abfd} 451 checking is an a.out file. Do some more checking, and set up 452 for access if it really is. Call back to the calling 453 environment's "finish up" function just before returning, to 454 handle any last-minute setup. 455*/ 456 457const bfd_target * 458NAME (aout, some_aout_object_p) (bfd *abfd, 459 struct internal_exec *execp, 460 const bfd_target *(*callback_to_real_object_p) (bfd *)) 461{ 462 struct aout_data_struct *rawptr, *oldrawptr; 463 const bfd_target *result; 464 bfd_size_type amt = sizeof (* rawptr); 465 466 rawptr = bfd_zalloc (abfd, amt); 467 if (rawptr == NULL) 468 return NULL; 469 470 oldrawptr = abfd->tdata.aout_data; 471 abfd->tdata.aout_data = rawptr; 472 473 /* Copy the contents of the old tdata struct. 474 In particular, we want the subformat, since for hpux it was set in 475 hp300hpux.c:swap_exec_header_in and will be used in 476 hp300hpux.c:callback. */ 477 if (oldrawptr != NULL) 478 *abfd->tdata.aout_data = *oldrawptr; 479 480 abfd->tdata.aout_data->a.hdr = &rawptr->e; 481 /* Copy in the internal_exec struct. */ 482 *(abfd->tdata.aout_data->a.hdr) = *execp; 483 execp = abfd->tdata.aout_data->a.hdr; 484 485 /* Set the file flags. */ 486 abfd->flags = BFD_NO_FLAGS; 487 if (execp->a_drsize || execp->a_trsize) 488 abfd->flags |= HAS_RELOC; 489 /* Setting of EXEC_P has been deferred to the bottom of this function. */ 490 if (execp->a_syms) 491 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 492 if (N_DYNAMIC (*execp)) 493 abfd->flags |= DYNAMIC; 494 495 if (N_MAGIC (*execp) == ZMAGIC) 496 { 497 abfd->flags |= D_PAGED | WP_TEXT; 498 adata (abfd).magic = z_magic; 499 } 500 else if (N_MAGIC (*execp) == QMAGIC) 501 { 502 abfd->flags |= D_PAGED | WP_TEXT; 503 adata (abfd).magic = z_magic; 504 adata (abfd).subformat = q_magic_format; 505 } 506 else if (N_MAGIC (*execp) == NMAGIC) 507 { 508 abfd->flags |= WP_TEXT; 509 adata (abfd).magic = n_magic; 510 } 511 else if (N_MAGIC (*execp) == OMAGIC 512 || N_MAGIC (*execp) == BMAGIC) 513 adata (abfd).magic = o_magic; 514 else 515 /* Should have been checked with N_BADMAG before this routine 516 was called. */ 517 abort (); 518 519 bfd_get_start_address (abfd) = execp->a_entry; 520 521 obj_aout_symbols (abfd) = NULL; 522 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 523 524 /* The default relocation entry size is that of traditional V7 Unix. */ 525 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 526 527 /* The default symbol entry size is that of traditional Unix. */ 528 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 529 530#ifdef USE_MMAP 531 bfd_init_window (&obj_aout_sym_window (abfd)); 532 bfd_init_window (&obj_aout_string_window (abfd)); 533#endif 534 obj_aout_external_syms (abfd) = NULL; 535 obj_aout_external_strings (abfd) = NULL; 536 obj_aout_sym_hashes (abfd) = NULL; 537 538 if (! NAME (aout, make_sections) (abfd)) 539 goto error_ret; 540 541 obj_datasec (abfd)->size = execp->a_data; 542 obj_bsssec (abfd)->size = execp->a_bss; 543 544 obj_textsec (abfd)->flags = 545 (execp->a_trsize != 0 546 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 547 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 548 obj_datasec (abfd)->flags = 549 (execp->a_drsize != 0 550 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 551 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 552 obj_bsssec (abfd)->flags = SEC_ALLOC; 553 554#ifdef THIS_IS_ONLY_DOCUMENTATION 555 /* The common code can't fill in these things because they depend 556 on either the start address of the text segment, the rounding 557 up of virtual addresses between segments, or the starting file 558 position of the text segment -- all of which varies among different 559 versions of a.out. */ 560 561 /* Call back to the format-dependent code to fill in the rest of the 562 fields and do any further cleanup. Things that should be filled 563 in by the callback: */ 564 565 struct exec *execp = exec_hdr (abfd); 566 567 obj_textsec (abfd)->size = N_TXTSIZE (*execp); 568 /* Data and bss are already filled in since they're so standard. */ 569 570 /* The virtual memory addresses of the sections. */ 571 obj_textsec (abfd)->vma = N_TXTADDR (*execp); 572 obj_datasec (abfd)->vma = N_DATADDR (*execp); 573 obj_bsssec (abfd)->vma = N_BSSADDR (*execp); 574 575 /* The file offsets of the sections. */ 576 obj_textsec (abfd)->filepos = N_TXTOFF (*execp); 577 obj_datasec (abfd)->filepos = N_DATOFF (*execp); 578 579 /* The file offsets of the relocation info. */ 580 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp); 581 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp); 582 583 /* The file offsets of the string table and symbol table. */ 584 obj_str_filepos (abfd) = N_STROFF (*execp); 585 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 586 587 /* Determine the architecture and machine type of the object file. */ 588 switch (N_MACHTYPE (*exec_hdr (abfd))) 589 { 590 default: 591 abfd->obj_arch = bfd_arch_obscure; 592 break; 593 } 594 595 adata (abfd)->page_size = TARGET_PAGE_SIZE; 596 adata (abfd)->segment_size = SEGMENT_SIZE; 597 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 598 599 return abfd->xvec; 600 601 /* The architecture is encoded in various ways in various a.out variants, 602 or is not encoded at all in some of them. The relocation size depends 603 on the architecture and the a.out variant. Finally, the return value 604 is the bfd_target vector in use. If an error occurs, return zero and 605 set bfd_error to the appropriate error code. 606 607 Formats such as b.out, which have additional fields in the a.out 608 header, should cope with them in this callback as well. */ 609#endif /* DOCUMENTATION */ 610 611 result = (*callback_to_real_object_p) (abfd); 612 613 /* Now that the segment addresses have been worked out, take a better 614 guess at whether the file is executable. If the entry point 615 is within the text segment, assume it is. (This makes files 616 executable even if their entry point address is 0, as long as 617 their text starts at zero.). 618 619 This test had to be changed to deal with systems where the text segment 620 runs at a different location than the default. The problem is that the 621 entry address can appear to be outside the text segment, thus causing an 622 erroneous conclusion that the file isn't executable. 623 624 To fix this, we now accept any non-zero entry point as an indication of 625 executability. This will work most of the time, since only the linker 626 sets the entry point, and that is likely to be non-zero for most systems. */ 627 628 if (execp->a_entry != 0 629 || (execp->a_entry >= obj_textsec (abfd)->vma 630 && execp->a_entry < (obj_textsec (abfd)->vma 631 + obj_textsec (abfd)->size))) 632 abfd->flags |= EXEC_P; 633#ifdef STAT_FOR_EXEC 634 else 635 { 636 struct stat stat_buf; 637 638 /* The original heuristic doesn't work in some important cases. 639 The a.out file has no information about the text start 640 address. For files (like kernels) linked to non-standard 641 addresses (ld -Ttext nnn) the entry point may not be between 642 the default text start (obj_textsec(abfd)->vma) and 643 (obj_textsec(abfd)->vma) + text size. This is not just a mach 644 issue. Many kernels are loaded at non standard addresses. */ 645 if (abfd->iostream != NULL 646 && (abfd->flags & BFD_IN_MEMORY) == 0 647 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0) 648 && ((stat_buf.st_mode & 0111) != 0)) 649 abfd->flags |= EXEC_P; 650 } 651#endif /* STAT_FOR_EXEC */ 652 653 if (result) 654 return result; 655 656 error_ret: 657 bfd_release (abfd, rawptr); 658 abfd->tdata.aout_data = oldrawptr; 659 return NULL; 660} 661 662/* 663FUNCTION 664 aout_@var{size}_mkobject 665 666SYNOPSIS 667 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd); 668 669DESCRIPTION 670 Initialize BFD @var{abfd} for use with a.out files. 671*/ 672 673bfd_boolean 674NAME (aout, mkobject) (bfd *abfd) 675{ 676 struct aout_data_struct *rawptr; 677 bfd_size_type amt = sizeof (* rawptr); 678 679 bfd_set_error (bfd_error_system_call); 680 681 rawptr = bfd_zalloc (abfd, amt); 682 if (rawptr == NULL) 683 return FALSE; 684 685 abfd->tdata.aout_data = rawptr; 686 exec_hdr (abfd) = &(rawptr->e); 687 688 obj_textsec (abfd) = NULL; 689 obj_datasec (abfd) = NULL; 690 obj_bsssec (abfd) = NULL; 691 692 return TRUE; 693} 694 695/* 696FUNCTION 697 aout_@var{size}_machine_type 698 699SYNOPSIS 700 enum machine_type aout_@var{size}_machine_type 701 (enum bfd_architecture arch, 702 unsigned long machine, 703 bfd_boolean *unknown); 704 705DESCRIPTION 706 Keep track of machine architecture and machine type for 707 a.out's. Return the <<machine_type>> for a particular 708 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 709 and machine can't be represented in a.out format. 710 711 If the architecture is understood, machine type 0 (default) 712 is always understood. 713*/ 714 715enum machine_type 716NAME (aout, machine_type) (enum bfd_architecture arch, 717 unsigned long machine, 718 bfd_boolean *unknown) 719{ 720 enum machine_type arch_flags; 721 722 arch_flags = M_UNKNOWN; 723 *unknown = TRUE; 724 725 switch (arch) 726 { 727 case bfd_arch_sparc: 728 if (machine == 0 729 || machine == bfd_mach_sparc 730 || machine == bfd_mach_sparc_sparclite 731 || machine == bfd_mach_sparc_sparclite_le 732 || machine == bfd_mach_sparc_v8plus 733 || machine == bfd_mach_sparc_v8plusa 734 || machine == bfd_mach_sparc_v8plusb 735 || machine == bfd_mach_sparc_v9 736 || machine == bfd_mach_sparc_v9a 737 || machine == bfd_mach_sparc_v9b) 738 arch_flags = M_SPARC; 739 else if (machine == bfd_mach_sparc_sparclet) 740 arch_flags = M_SPARCLET; 741 break; 742 743 case bfd_arch_m68k: 744 switch (machine) 745 { 746 case 0: arch_flags = M_68010; break; 747 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break; 748 case bfd_mach_m68010: arch_flags = M_68010; break; 749 case bfd_mach_m68020: arch_flags = M_68020; break; 750 default: arch_flags = M_UNKNOWN; break; 751 } 752 break; 753 754 case bfd_arch_i386: 755 if (machine == 0 756 || machine == bfd_mach_i386_i386 757 || machine == bfd_mach_i386_i386_intel_syntax) 758 arch_flags = M_386; 759 break; 760 761 case bfd_arch_arm: 762 if (machine == 0) 763 arch_flags = M_ARM; 764 break; 765 766 case bfd_arch_mips: 767 switch (machine) 768 { 769 case 0: 770 case bfd_mach_mips3000: 771 case bfd_mach_mips3900: 772 arch_flags = M_MIPS1; 773 break; 774 case bfd_mach_mips6000: 775 arch_flags = M_MIPS2; 776 break; 777 case bfd_mach_mips4000: 778 case bfd_mach_mips4010: 779 case bfd_mach_mips4100: 780 case bfd_mach_mips4300: 781 case bfd_mach_mips4400: 782 case bfd_mach_mips4600: 783 case bfd_mach_mips4650: 784 case bfd_mach_mips8000: 785 case bfd_mach_mips9000: 786 case bfd_mach_mips10000: 787 case bfd_mach_mips12000: 788 case bfd_mach_mips16: 789 case bfd_mach_mipsisa32: 790 case bfd_mach_mipsisa32r2: 791 case bfd_mach_mips5: 792 case bfd_mach_mipsisa64: 793 case bfd_mach_mipsisa64r2: 794 case bfd_mach_mips_sb1: 795 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 796 arch_flags = M_MIPS2; 797 break; 798 default: 799 arch_flags = M_UNKNOWN; 800 break; 801 } 802 break; 803 804 case bfd_arch_ns32k: 805 switch (machine) 806 { 807 case 0: arch_flags = M_NS32532; break; 808 case 32032: arch_flags = M_NS32032; break; 809 case 32532: arch_flags = M_NS32532; break; 810 default: arch_flags = M_UNKNOWN; break; 811 } 812 break; 813 814 case bfd_arch_vax: 815 *unknown = FALSE; 816 break; 817 818 case bfd_arch_cris: 819 if (machine == 0 || machine == 255) 820 arch_flags = M_CRIS; 821 break; 822 823 case bfd_arch_m88k: 824 *unknown = FALSE; 825 break; 826 827 default: 828 arch_flags = M_UNKNOWN; 829 } 830 831 if (arch_flags != M_UNKNOWN) 832 *unknown = FALSE; 833 834 return arch_flags; 835} 836 837/* 838FUNCTION 839 aout_@var{size}_set_arch_mach 840 841SYNOPSIS 842 bfd_boolean aout_@var{size}_set_arch_mach, 843 (bfd *, 844 enum bfd_architecture arch, 845 unsigned long machine); 846 847DESCRIPTION 848 Set the architecture and the machine of the BFD @var{abfd} to the 849 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 850 can support the architecture required. 851*/ 852 853bfd_boolean 854NAME (aout, set_arch_mach) (bfd *abfd, 855 enum bfd_architecture arch, 856 unsigned long machine) 857{ 858 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 859 return FALSE; 860 861 if (arch != bfd_arch_unknown) 862 { 863 bfd_boolean unknown; 864 865 NAME (aout, machine_type) (arch, machine, &unknown); 866 if (unknown) 867 return FALSE; 868 } 869 870 /* Determine the size of a relocation entry. */ 871 switch (arch) 872 { 873 case bfd_arch_sparc: 874 case bfd_arch_mips: 875 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 876 break; 877 default: 878 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 879 break; 880 } 881 882 return (*aout_backend_info (abfd)->set_sizes) (abfd); 883} 884 885static void 886adjust_o_magic (bfd *abfd, struct internal_exec *execp) 887{ 888 file_ptr pos = adata (abfd).exec_bytes_size; 889 bfd_vma vma = 0; 890 int pad = 0; 891 892 /* Text. */ 893 obj_textsec (abfd)->filepos = pos; 894 if (!obj_textsec (abfd)->user_set_vma) 895 obj_textsec (abfd)->vma = vma; 896 else 897 vma = obj_textsec (abfd)->vma; 898 899 pos += obj_textsec (abfd)->size; 900 vma += obj_textsec (abfd)->size; 901 902 /* Data. */ 903 if (!obj_datasec (abfd)->user_set_vma) 904 { 905 obj_textsec (abfd)->size += pad; 906 pos += pad; 907 vma += pad; 908 obj_datasec (abfd)->vma = vma; 909 } 910 else 911 vma = obj_datasec (abfd)->vma; 912 obj_datasec (abfd)->filepos = pos; 913 pos += obj_datasec (abfd)->size; 914 vma += obj_datasec (abfd)->size; 915 916 /* BSS. */ 917 if (!obj_bsssec (abfd)->user_set_vma) 918 { 919 obj_datasec (abfd)->size += pad; 920 pos += pad; 921 vma += pad; 922 obj_bsssec (abfd)->vma = vma; 923 } 924 else 925 { 926 /* The VMA of the .bss section is set by the VMA of the 927 .data section plus the size of the .data section. We may 928 need to add padding bytes to make this true. */ 929 pad = obj_bsssec (abfd)->vma - vma; 930 if (pad > 0) 931 { 932 obj_datasec (abfd)->size += pad; 933 pos += pad; 934 } 935 } 936 obj_bsssec (abfd)->filepos = pos; 937 938 /* Fix up the exec header. */ 939 execp->a_text = obj_textsec (abfd)->size; 940 execp->a_data = obj_datasec (abfd)->size; 941 execp->a_bss = obj_bsssec (abfd)->size; 942 N_SET_MAGIC (*execp, OMAGIC); 943} 944 945static void 946adjust_z_magic (bfd *abfd, struct internal_exec *execp) 947{ 948 bfd_size_type data_pad, text_pad; 949 file_ptr text_end; 950 const struct aout_backend_data *abdp; 951 /* TRUE if text includes exec header. */ 952 bfd_boolean ztih; 953 954 abdp = aout_backend_info (abfd); 955 956 /* Text. */ 957 ztih = (abdp != NULL 958 && (abdp->text_includes_header 959 || obj_aout_subformat (abfd) == q_magic_format)); 960 obj_textsec (abfd)->filepos = (ztih 961 ? adata (abfd).exec_bytes_size 962 : adata (abfd).zmagic_disk_block_size); 963 if (! obj_textsec (abfd)->user_set_vma) 964 { 965 /* ?? Do we really need to check for relocs here? */ 966 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 967 ? 0 968 : (ztih 969 ? (abdp->default_text_vma 970 + adata (abfd).exec_bytes_size) 971 : abdp->default_text_vma)); 972 text_pad = 0; 973 } 974 else 975 { 976 /* The .text section is being loaded at an unusual address. We 977 may need to pad it such that the .data section starts at a page 978 boundary. */ 979 if (ztih) 980 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 981 & (adata (abfd).page_size - 1)); 982 else 983 text_pad = ((- obj_textsec (abfd)->vma) 984 & (adata (abfd).page_size - 1)); 985 } 986 987 /* Find start of data. */ 988 if (ztih) 989 { 990 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; 991 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 992 } 993 else 994 { 995 /* Note that if page_size == zmagic_disk_block_size, then 996 filepos == page_size, and this case is the same as the ztih 997 case. */ 998 text_end = obj_textsec (abfd)->size; 999 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1000 text_end += obj_textsec (abfd)->filepos; 1001 } 1002 obj_textsec (abfd)->size += text_pad; 1003 text_end += text_pad; 1004 1005 /* Data. */ 1006 if (!obj_datasec (abfd)->user_set_vma) 1007 { 1008 bfd_vma vma; 1009 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size; 1010 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1011 } 1012 if (abdp && abdp->zmagic_mapped_contiguous) 1013 { 1014 asection * text = obj_textsec (abfd); 1015 asection * data = obj_datasec (abfd); 1016 1017 text_pad = data->vma - (text->vma + text->size); 1018 /* Only pad the text section if the data 1019 section is going to be placed after it. */ 1020 if (text_pad > 0) 1021 text->size += text_pad; 1022 } 1023 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1024 + obj_textsec (abfd)->size); 1025 1026 /* Fix up exec header while we're at it. */ 1027 execp->a_text = obj_textsec (abfd)->size; 1028 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1029 execp->a_text += adata (abfd).exec_bytes_size; 1030 if (obj_aout_subformat (abfd) == q_magic_format) 1031 N_SET_MAGIC (*execp, QMAGIC); 1032 else 1033 N_SET_MAGIC (*execp, ZMAGIC); 1034 1035 /* Spec says data section should be rounded up to page boundary. */ 1036 obj_datasec (abfd)->size 1037 = align_power (obj_datasec (abfd)->size, 1038 obj_bsssec (abfd)->alignment_power); 1039 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size, 1040 adata (abfd).page_size); 1041 data_pad = execp->a_data - obj_datasec (abfd)->size; 1042 1043 /* BSS. */ 1044 if (!obj_bsssec (abfd)->user_set_vma) 1045 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1046 + obj_datasec (abfd)->size); 1047 /* If the BSS immediately follows the data section and extra space 1048 in the page is left after the data section, fudge data 1049 in the header so that the bss section looks smaller by that 1050 amount. We'll start the bss section there, and lie to the OS. 1051 (Note that a linker script, as well as the above assignment, 1052 could have explicitly set the BSS vma to immediately follow 1053 the data section.) */ 1054 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1055 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size) 1056 execp->a_bss = (data_pad > obj_bsssec (abfd)->size 1057 ? 0 : obj_bsssec (abfd)->size - data_pad); 1058 else 1059 execp->a_bss = obj_bsssec (abfd)->size; 1060} 1061 1062static void 1063adjust_n_magic (bfd *abfd, struct internal_exec *execp) 1064{ 1065 file_ptr pos = adata (abfd).exec_bytes_size; 1066 bfd_vma vma = 0; 1067 int pad; 1068 1069 /* Text. */ 1070 obj_textsec (abfd)->filepos = pos; 1071 if (!obj_textsec (abfd)->user_set_vma) 1072 obj_textsec (abfd)->vma = vma; 1073 else 1074 vma = obj_textsec (abfd)->vma; 1075 pos += obj_textsec (abfd)->size; 1076 vma += obj_textsec (abfd)->size; 1077 1078 /* Data. */ 1079 obj_datasec (abfd)->filepos = pos; 1080 if (!obj_datasec (abfd)->user_set_vma) 1081 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1082 vma = obj_datasec (abfd)->vma; 1083 1084 /* Since BSS follows data immediately, see if it needs alignment. */ 1085 vma += obj_datasec (abfd)->size; 1086 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1087 obj_datasec (abfd)->size += pad; 1088 pos += obj_datasec (abfd)->size; 1089 1090 /* BSS. */ 1091 if (!obj_bsssec (abfd)->user_set_vma) 1092 obj_bsssec (abfd)->vma = vma; 1093 else 1094 vma = obj_bsssec (abfd)->vma; 1095 1096 /* Fix up exec header. */ 1097 execp->a_text = obj_textsec (abfd)->size; 1098 execp->a_data = obj_datasec (abfd)->size; 1099 execp->a_bss = obj_bsssec (abfd)->size; 1100 N_SET_MAGIC (*execp, NMAGIC); 1101} 1102 1103bfd_boolean 1104NAME (aout, adjust_sizes_and_vmas) (bfd *abfd, 1105 bfd_size_type *text_size, 1106 file_ptr *text_end ATTRIBUTE_UNUSED) 1107{ 1108 struct internal_exec *execp = exec_hdr (abfd); 1109 1110 if (! NAME (aout, make_sections) (abfd)) 1111 return FALSE; 1112 1113 if (adata (abfd).magic != undecided_magic) 1114 return TRUE; 1115 1116 obj_textsec (abfd)->size = 1117 align_power (obj_textsec (abfd)->size, 1118 obj_textsec (abfd)->alignment_power); 1119 1120 *text_size = obj_textsec (abfd)->size; 1121 /* Rule (heuristic) for when to pad to a new page. Note that there 1122 are (at least) two ways demand-paged (ZMAGIC) files have been 1123 handled. Most Berkeley-based systems start the text segment at 1124 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1125 segment right after the exec header; the latter is counted in the 1126 text segment size, and is paged in by the kernel with the rest of 1127 the text. */ 1128 1129 /* This perhaps isn't the right way to do this, but made it simpler for me 1130 to understand enough to implement it. Better would probably be to go 1131 right from BFD flags to alignment/positioning characteristics. But the 1132 old code was sloppy enough about handling the flags, and had enough 1133 other magic, that it was a little hard for me to understand. I think 1134 I understand it better now, but I haven't time to do the cleanup this 1135 minute. */ 1136 1137 if (abfd->flags & D_PAGED) 1138 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1139 adata (abfd).magic = z_magic; 1140 else if (abfd->flags & WP_TEXT) 1141 adata (abfd).magic = n_magic; 1142 else 1143 adata (abfd).magic = o_magic; 1144 1145#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1146#if __GNUC__ >= 2 1147 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1148 ({ char *str; 1149 switch (adata (abfd).magic) 1150 { 1151 case n_magic: str = "NMAGIC"; break; 1152 case o_magic: str = "OMAGIC"; break; 1153 case z_magic: str = "ZMAGIC"; break; 1154 default: abort (); 1155 } 1156 str; 1157 }), 1158 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1159 obj_textsec (abfd)->alignment_power, 1160 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1161 obj_datasec (abfd)->alignment_power, 1162 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size, 1163 obj_bsssec (abfd)->alignment_power); 1164#endif 1165#endif 1166 1167 switch (adata (abfd).magic) 1168 { 1169 case o_magic: 1170 adjust_o_magic (abfd, execp); 1171 break; 1172 case z_magic: 1173 adjust_z_magic (abfd, execp); 1174 break; 1175 case n_magic: 1176 adjust_n_magic (abfd, execp); 1177 break; 1178 default: 1179 abort (); 1180 } 1181 1182#ifdef BFD_AOUT_DEBUG 1183 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1184 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1185 obj_textsec (abfd)->filepos, 1186 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1187 obj_datasec (abfd)->filepos, 1188 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size); 1189#endif 1190 1191 return TRUE; 1192} 1193 1194/* 1195FUNCTION 1196 aout_@var{size}_new_section_hook 1197 1198SYNOPSIS 1199 bfd_boolean aout_@var{size}_new_section_hook, 1200 (bfd *abfd, 1201 asection *newsect); 1202 1203DESCRIPTION 1204 Called by the BFD in response to a @code{bfd_make_section} 1205 request. 1206*/ 1207bfd_boolean 1208NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) 1209{ 1210 /* Align to double at least. */ 1211 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power; 1212 1213 if (bfd_get_format (abfd) == bfd_object) 1214 { 1215 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text")) 1216 { 1217 obj_textsec (abfd)= newsect; 1218 newsect->target_index = N_TEXT; 1219 } 1220 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data")) 1221 { 1222 obj_datasec (abfd) = newsect; 1223 newsect->target_index = N_DATA; 1224 } 1225 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss")) 1226 { 1227 obj_bsssec (abfd) = newsect; 1228 newsect->target_index = N_BSS; 1229 } 1230 } 1231 1232 /* We allow more than three sections internally. */ 1233 return _bfd_generic_new_section_hook (abfd, newsect); 1234} 1235 1236bfd_boolean 1237NAME (aout, set_section_contents) (bfd *abfd, 1238 sec_ptr section, 1239 const void * location, 1240 file_ptr offset, 1241 bfd_size_type count) 1242{ 1243 file_ptr text_end; 1244 bfd_size_type text_size; 1245 1246 if (! abfd->output_has_begun) 1247 { 1248 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 1249 return FALSE; 1250 } 1251 1252 if (section == obj_bsssec (abfd)) 1253 { 1254 bfd_set_error (bfd_error_no_contents); 1255 return FALSE; 1256 } 1257 1258 if (section != obj_textsec (abfd) 1259 && section != obj_datasec (abfd)) 1260 { 1261 if (aout_section_merge_with_text_p (abfd, section)) 1262 section->filepos = obj_textsec (abfd)->filepos + 1263 (section->vma - obj_textsec (abfd)->vma); 1264 else 1265 { 1266 (*_bfd_error_handler) 1267 (_("%s: can not represent section `%s' in a.out object file format"), 1268 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1269 bfd_set_error (bfd_error_nonrepresentable_section); 1270 return FALSE; 1271 } 1272 } 1273 1274 if (count != 0) 1275 { 1276 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1277 || bfd_bwrite (location, count, abfd) != count) 1278 return FALSE; 1279 } 1280 1281 return TRUE; 1282} 1283 1284/* Read the external symbols from an a.out file. */ 1285 1286static bfd_boolean 1287aout_get_external_symbols (bfd *abfd) 1288{ 1289 if (obj_aout_external_syms (abfd) == NULL) 1290 { 1291 bfd_size_type count; 1292 struct external_nlist *syms; 1293 bfd_size_type amt; 1294 1295 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; 1296 1297#ifdef USE_MMAP 1298 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), 1299 exec_hdr (abfd)->a_syms, 1300 &obj_aout_sym_window (abfd), TRUE)) 1301 return FALSE; 1302 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1303#else 1304 /* We allocate using malloc to make the values easy to free 1305 later on. If we put them on the objalloc it might not be 1306 possible to free them. */ 1307 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE); 1308 if (syms == NULL && count != 0) 1309 return FALSE; 1310 1311 amt = exec_hdr (abfd)->a_syms; 1312 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1313 || bfd_bread (syms, amt, abfd) != amt) 1314 { 1315 free (syms); 1316 return FALSE; 1317 } 1318#endif 1319 1320 obj_aout_external_syms (abfd) = syms; 1321 obj_aout_external_sym_count (abfd) = count; 1322 } 1323 1324 if (obj_aout_external_strings (abfd) == NULL 1325 && exec_hdr (abfd)->a_syms != 0) 1326 { 1327 unsigned char string_chars[BYTES_IN_WORD]; 1328 bfd_size_type stringsize; 1329 char *strings; 1330 bfd_size_type amt = BYTES_IN_WORD; 1331 1332 /* Get the size of the strings. */ 1333 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1334 || bfd_bread ((void *) string_chars, amt, abfd) != amt) 1335 return FALSE; 1336 stringsize = GET_WORD (abfd, string_chars); 1337 1338#ifdef USE_MMAP 1339 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1340 &obj_aout_string_window (abfd), TRUE)) 1341 return FALSE; 1342 strings = (char *) obj_aout_string_window (abfd).data; 1343#else 1344 strings = bfd_malloc (stringsize + 1); 1345 if (strings == NULL) 1346 return FALSE; 1347 1348 /* Skip space for the string count in the buffer for convenience 1349 when using indexes. */ 1350 amt = stringsize - BYTES_IN_WORD; 1351 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1352 { 1353 free (strings); 1354 return FALSE; 1355 } 1356#endif 1357 1358 /* Ensure that a zero index yields an empty string. */ 1359 strings[0] = '\0'; 1360 1361 strings[stringsize - 1] = 0; 1362 1363 obj_aout_external_strings (abfd) = strings; 1364 obj_aout_external_string_size (abfd) = stringsize; 1365 } 1366 1367 return TRUE; 1368} 1369 1370/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1371 and symbol->value fields of CACHE_PTR will be set from the a.out 1372 nlist structure. This function is responsible for setting 1373 symbol->flags and symbol->section, and adjusting symbol->value. */ 1374 1375static bfd_boolean 1376translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr) 1377{ 1378 flagword visible; 1379 1380 if ((cache_ptr->type & N_STAB) != 0 1381 || cache_ptr->type == N_FN) 1382 { 1383 asection *sec; 1384 1385 /* This is a debugging symbol. */ 1386 cache_ptr->symbol.flags = BSF_DEBUGGING; 1387 1388 /* Work out the symbol section. */ 1389 switch (cache_ptr->type & N_TYPE) 1390 { 1391 case N_TEXT: 1392 case N_FN: 1393 sec = obj_textsec (abfd); 1394 break; 1395 case N_DATA: 1396 sec = obj_datasec (abfd); 1397 break; 1398 case N_BSS: 1399 sec = obj_bsssec (abfd); 1400 break; 1401 default: 1402 case N_ABS: 1403 sec = bfd_abs_section_ptr; 1404 break; 1405 } 1406 1407 cache_ptr->symbol.section = sec; 1408 cache_ptr->symbol.value -= sec->vma; 1409 1410 return TRUE; 1411 } 1412 1413 /* Get the default visibility. This does not apply to all types, so 1414 we just hold it in a local variable to use if wanted. */ 1415 if ((cache_ptr->type & N_EXT) == 0) 1416 visible = BSF_LOCAL; 1417 else 1418 visible = BSF_GLOBAL; 1419 1420 switch (cache_ptr->type) 1421 { 1422 default: 1423 case N_ABS: case N_ABS | N_EXT: 1424 cache_ptr->symbol.section = bfd_abs_section_ptr; 1425 cache_ptr->symbol.flags = visible; 1426 break; 1427 1428 case N_UNDF | N_EXT: 1429 if (cache_ptr->symbol.value != 0) 1430 { 1431 /* This is a common symbol. */ 1432 cache_ptr->symbol.flags = BSF_GLOBAL; 1433 cache_ptr->symbol.section = bfd_com_section_ptr; 1434 } 1435 else 1436 { 1437 cache_ptr->symbol.flags = 0; 1438 cache_ptr->symbol.section = bfd_und_section_ptr; 1439 } 1440 break; 1441 1442 case N_TEXT: case N_TEXT | N_EXT: 1443 cache_ptr->symbol.section = obj_textsec (abfd); 1444 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1445 cache_ptr->symbol.flags = visible; 1446 break; 1447 1448 /* N_SETV symbols used to represent set vectors placed in the 1449 data section. They are no longer generated. Theoretically, 1450 it was possible to extract the entries and combine them with 1451 new ones, although I don't know if that was ever actually 1452 done. Unless that feature is restored, treat them as data 1453 symbols. */ 1454 case N_SETV: case N_SETV | N_EXT: 1455 case N_DATA: case N_DATA | N_EXT: 1456 cache_ptr->symbol.section = obj_datasec (abfd); 1457 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1458 cache_ptr->symbol.flags = visible; 1459 break; 1460 1461 case N_BSS: case N_BSS | N_EXT: 1462 cache_ptr->symbol.section = obj_bsssec (abfd); 1463 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1464 cache_ptr->symbol.flags = visible; 1465 break; 1466 1467 case N_SETA: case N_SETA | N_EXT: 1468 case N_SETT: case N_SETT | N_EXT: 1469 case N_SETD: case N_SETD | N_EXT: 1470 case N_SETB: case N_SETB | N_EXT: 1471 { 1472 /* This code is no longer needed. It used to be used to make 1473 the linker handle set symbols, but they are now handled in 1474 the add_symbols routine instead. */ 1475 switch (cache_ptr->type & N_TYPE) 1476 { 1477 case N_SETA: 1478 cache_ptr->symbol.section = bfd_abs_section_ptr; 1479 break; 1480 case N_SETT: 1481 cache_ptr->symbol.section = obj_textsec (abfd); 1482 break; 1483 case N_SETD: 1484 cache_ptr->symbol.section = obj_datasec (abfd); 1485 break; 1486 case N_SETB: 1487 cache_ptr->symbol.section = obj_bsssec (abfd); 1488 break; 1489 } 1490 1491 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1492 } 1493 break; 1494 1495 case N_WARNING: 1496 /* This symbol is the text of a warning message. The next 1497 symbol is the symbol to associate the warning with. If a 1498 reference is made to that symbol, a warning is issued. */ 1499 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1500 cache_ptr->symbol.section = bfd_abs_section_ptr; 1501 break; 1502 1503 case N_INDR: case N_INDR | N_EXT: 1504 /* An indirect symbol. This consists of two symbols in a row. 1505 The first symbol is the name of the indirection. The second 1506 symbol is the name of the target. A reference to the first 1507 symbol becomes a reference to the second. */ 1508 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1509 cache_ptr->symbol.section = bfd_ind_section_ptr; 1510 break; 1511 1512 case N_WEAKU: 1513 cache_ptr->symbol.section = bfd_und_section_ptr; 1514 cache_ptr->symbol.flags = BSF_WEAK; 1515 break; 1516 1517 case N_WEAKA: 1518 cache_ptr->symbol.section = bfd_abs_section_ptr; 1519 cache_ptr->symbol.flags = BSF_WEAK; 1520 break; 1521 1522 case N_WEAKT: 1523 cache_ptr->symbol.section = obj_textsec (abfd); 1524 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1525 cache_ptr->symbol.flags = BSF_WEAK; 1526 break; 1527 1528 case N_WEAKD: 1529 cache_ptr->symbol.section = obj_datasec (abfd); 1530 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1531 cache_ptr->symbol.flags = BSF_WEAK; 1532 break; 1533 1534 case N_WEAKB: 1535 cache_ptr->symbol.section = obj_bsssec (abfd); 1536 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1537 cache_ptr->symbol.flags = BSF_WEAK; 1538 break; 1539 } 1540 1541 return TRUE; 1542} 1543 1544/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1545 1546static bfd_boolean 1547translate_to_native_sym_flags (bfd *abfd, 1548 asymbol *cache_ptr, 1549 struct external_nlist *sym_pointer) 1550{ 1551 bfd_vma value = cache_ptr->value; 1552 asection *sec; 1553 bfd_vma off; 1554 1555 /* Mask out any existing type bits in case copying from one section 1556 to another. */ 1557 sym_pointer->e_type[0] &= ~N_TYPE; 1558 1559 sec = bfd_get_section (cache_ptr); 1560 off = 0; 1561 1562 if (sec == NULL) 1563 { 1564 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1565 file. */ 1566 (*_bfd_error_handler) 1567 (_("%s: can not represent section for symbol `%s' in a.out object file format"), 1568 bfd_get_filename (abfd), 1569 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1570 bfd_set_error (bfd_error_nonrepresentable_section); 1571 return FALSE; 1572 } 1573 1574 if (sec->output_section != NULL) 1575 { 1576 off = sec->output_offset; 1577 sec = sec->output_section; 1578 } 1579 1580 if (bfd_is_abs_section (sec)) 1581 sym_pointer->e_type[0] |= N_ABS; 1582 else if (sec == obj_textsec (abfd)) 1583 sym_pointer->e_type[0] |= N_TEXT; 1584 else if (sec == obj_datasec (abfd)) 1585 sym_pointer->e_type[0] |= N_DATA; 1586 else if (sec == obj_bsssec (abfd)) 1587 sym_pointer->e_type[0] |= N_BSS; 1588 else if (bfd_is_und_section (sec)) 1589 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1590 else if (bfd_is_ind_section (sec)) 1591 sym_pointer->e_type[0] = N_INDR; 1592 else if (bfd_is_com_section (sec)) 1593 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1594 else 1595 { 1596 if (aout_section_merge_with_text_p (abfd, sec)) 1597 sym_pointer->e_type[0] |= N_TEXT; 1598 else 1599 { 1600 (*_bfd_error_handler) 1601 (_("%s: can not represent section `%s' in a.out object file format"), 1602 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1603 bfd_set_error (bfd_error_nonrepresentable_section); 1604 return FALSE; 1605 } 1606 } 1607 1608 /* Turn the symbol from section relative to absolute again. */ 1609 value += sec->vma + off; 1610 1611 if ((cache_ptr->flags & BSF_WARNING) != 0) 1612 sym_pointer->e_type[0] = N_WARNING; 1613 1614 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1615 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1616 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1617 sym_pointer->e_type[0] |= N_EXT; 1618 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1619 sym_pointer->e_type[0] &= ~N_EXT; 1620 1621 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1622 { 1623 int type = ((aout_symbol_type *) cache_ptr)->type; 1624 1625 switch (type) 1626 { 1627 case N_ABS: type = N_SETA; break; 1628 case N_TEXT: type = N_SETT; break; 1629 case N_DATA: type = N_SETD; break; 1630 case N_BSS: type = N_SETB; break; 1631 } 1632 sym_pointer->e_type[0] = type; 1633 } 1634 1635 if ((cache_ptr->flags & BSF_WEAK) != 0) 1636 { 1637 int type; 1638 1639 switch (sym_pointer->e_type[0] & N_TYPE) 1640 { 1641 default: 1642 case N_ABS: type = N_WEAKA; break; 1643 case N_TEXT: type = N_WEAKT; break; 1644 case N_DATA: type = N_WEAKD; break; 1645 case N_BSS: type = N_WEAKB; break; 1646 case N_UNDF: type = N_WEAKU; break; 1647 } 1648 sym_pointer->e_type[0] = type; 1649 } 1650 1651 PUT_WORD (abfd, value, sym_pointer->e_value); 1652 1653 return TRUE; 1654} 1655 1656/* Native-level interface to symbols. */ 1657 1658asymbol * 1659NAME (aout, make_empty_symbol) (bfd *abfd) 1660{ 1661 bfd_size_type amt = sizeof (aout_symbol_type); 1662 1663 aout_symbol_type *new = bfd_zalloc (abfd, amt); 1664 if (!new) 1665 return NULL; 1666 new->symbol.the_bfd = abfd; 1667 1668 return &new->symbol; 1669} 1670 1671/* Translate a set of internal symbols into external symbols. */ 1672 1673bfd_boolean 1674NAME (aout, translate_symbol_table) (bfd *abfd, 1675 aout_symbol_type *in, 1676 struct external_nlist *ext, 1677 bfd_size_type count, 1678 char *str, 1679 bfd_size_type strsize, 1680 bfd_boolean dynamic) 1681{ 1682 struct external_nlist *ext_end; 1683 1684 ext_end = ext + count; 1685 for (; ext < ext_end; ext++, in++) 1686 { 1687 bfd_vma x; 1688 1689 x = GET_WORD (abfd, ext->e_strx); 1690 in->symbol.the_bfd = abfd; 1691 1692 /* For the normal symbols, the zero index points at the number 1693 of bytes in the string table but is to be interpreted as the 1694 null string. For the dynamic symbols, the number of bytes in 1695 the string table is stored in the __DYNAMIC structure and the 1696 zero index points at an actual string. */ 1697 if (x == 0 && ! dynamic) 1698 in->symbol.name = ""; 1699 else if (x < strsize) 1700 in->symbol.name = str + x; 1701 else 1702 return FALSE; 1703 1704 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1705 in->desc = H_GET_16 (abfd, ext->e_desc); 1706 in->other = H_GET_8 (abfd, ext->e_other); 1707 in->type = H_GET_8 (abfd, ext->e_type); 1708 in->symbol.udata.p = NULL; 1709 1710 if (! translate_from_native_sym_flags (abfd, in)) 1711 return FALSE; 1712 1713 if (dynamic) 1714 in->symbol.flags |= BSF_DYNAMIC; 1715 } 1716 1717 return TRUE; 1718} 1719 1720/* We read the symbols into a buffer, which is discarded when this 1721 function exits. We read the strings into a buffer large enough to 1722 hold them all plus all the cached symbol entries. */ 1723 1724bfd_boolean 1725NAME (aout, slurp_symbol_table) (bfd *abfd) 1726{ 1727 struct external_nlist *old_external_syms; 1728 aout_symbol_type *cached; 1729 bfd_size_type cached_size; 1730 1731 /* If there's no work to be done, don't do any. */ 1732 if (obj_aout_symbols (abfd) != NULL) 1733 return TRUE; 1734 1735 old_external_syms = obj_aout_external_syms (abfd); 1736 1737 if (! aout_get_external_symbols (abfd)) 1738 return FALSE; 1739 1740 cached_size = obj_aout_external_sym_count (abfd); 1741 cached_size *= sizeof (aout_symbol_type); 1742 cached = bfd_zmalloc (cached_size); 1743 if (cached == NULL && cached_size != 0) 1744 return FALSE; 1745 1746 /* Convert from external symbol information to internal. */ 1747 if (! (NAME (aout, translate_symbol_table) 1748 (abfd, cached, 1749 obj_aout_external_syms (abfd), 1750 obj_aout_external_sym_count (abfd), 1751 obj_aout_external_strings (abfd), 1752 obj_aout_external_string_size (abfd), 1753 FALSE))) 1754 { 1755 free (cached); 1756 return FALSE; 1757 } 1758 1759 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1760 1761 obj_aout_symbols (abfd) = cached; 1762 1763 /* It is very likely that anybody who calls this function will not 1764 want the external symbol information, so if it was allocated 1765 because of our call to aout_get_external_symbols, we free it up 1766 right away to save space. */ 1767 if (old_external_syms == NULL 1768 && obj_aout_external_syms (abfd) != NULL) 1769 { 1770#ifdef USE_MMAP 1771 bfd_free_window (&obj_aout_sym_window (abfd)); 1772#else 1773 free (obj_aout_external_syms (abfd)); 1774#endif 1775 obj_aout_external_syms (abfd) = NULL; 1776 } 1777 1778 return TRUE; 1779} 1780 1781/* We use a hash table when writing out symbols so that we only write 1782 out a particular string once. This helps particularly when the 1783 linker writes out stabs debugging entries, because each different 1784 contributing object file tends to have many duplicate stabs 1785 strings. 1786 1787 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1788 if BFD_TRADITIONAL_FORMAT is set. */ 1789 1790/* Get the index of a string in a strtab, adding it if it is not 1791 already present. */ 1792 1793static inline bfd_size_type 1794add_to_stringtab (bfd *abfd, 1795 struct bfd_strtab_hash *tab, 1796 const char *str, 1797 bfd_boolean copy) 1798{ 1799 bfd_boolean hash; 1800 bfd_size_type index; 1801 1802 /* An index of 0 always means the empty string. */ 1803 if (str == 0 || *str == '\0') 1804 return 0; 1805 1806 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1807 doesn't understand a hashed string table. */ 1808 hash = TRUE; 1809 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1810 hash = FALSE; 1811 1812 index = _bfd_stringtab_add (tab, str, hash, copy); 1813 1814 if (index != (bfd_size_type) -1) 1815 /* Add BYTES_IN_WORD to the return value to account for the 1816 space taken up by the string table size. */ 1817 index += BYTES_IN_WORD; 1818 1819 return index; 1820} 1821 1822/* Write out a strtab. ABFD is already at the right location in the 1823 file. */ 1824 1825static bfd_boolean 1826emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) 1827{ 1828 bfd_byte buffer[BYTES_IN_WORD]; 1829 bfd_size_type amt = BYTES_IN_WORD; 1830 1831 /* The string table starts with the size. */ 1832 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1833 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt) 1834 return FALSE; 1835 1836 return _bfd_stringtab_emit (abfd, tab); 1837} 1838 1839bfd_boolean 1840NAME (aout, write_syms) (bfd *abfd) 1841{ 1842 unsigned int count ; 1843 asymbol **generic = bfd_get_outsymbols (abfd); 1844 struct bfd_strtab_hash *strtab; 1845 1846 strtab = _bfd_stringtab_init (); 1847 if (strtab == NULL) 1848 return FALSE; 1849 1850 for (count = 0; count < bfd_get_symcount (abfd); count++) 1851 { 1852 asymbol *g = generic[count]; 1853 bfd_size_type indx; 1854 struct external_nlist nsp; 1855 bfd_size_type amt; 1856 1857 indx = add_to_stringtab (abfd, strtab, g->name, FALSE); 1858 if (indx == (bfd_size_type) -1) 1859 goto error_return; 1860 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1861 1862 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1863 { 1864 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1865 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1866 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1867 } 1868 else 1869 { 1870 H_PUT_16 (abfd, 0, nsp.e_desc); 1871 H_PUT_8 (abfd, 0, nsp.e_other); 1872 H_PUT_8 (abfd, 0, nsp.e_type); 1873 } 1874 1875 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1876 goto error_return; 1877 1878 amt = EXTERNAL_NLIST_SIZE; 1879 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt) 1880 goto error_return; 1881 1882 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1883 here, at the end. */ 1884 g->KEEPIT = count; 1885 } 1886 1887 if (! emit_stringtab (abfd, strtab)) 1888 goto error_return; 1889 1890 _bfd_stringtab_free (strtab); 1891 1892 return TRUE; 1893 1894error_return: 1895 _bfd_stringtab_free (strtab); 1896 return FALSE; 1897} 1898 1899long 1900NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) 1901{ 1902 unsigned int counter = 0; 1903 aout_symbol_type *symbase; 1904 1905 if (!NAME (aout, slurp_symbol_table) (abfd)) 1906 return -1; 1907 1908 for (symbase = obj_aout_symbols (abfd); 1909 counter++ < bfd_get_symcount (abfd); 1910 ) 1911 *(location++) = (asymbol *) (symbase++); 1912 *location++ =0; 1913 return bfd_get_symcount (abfd); 1914} 1915 1916/* Standard reloc stuff. */ 1917/* Output standard relocation information to a file in target byte order. */ 1918 1919extern void NAME (aout, swap_std_reloc_out) 1920 (bfd *, arelent *, struct reloc_std_external *); 1921 1922void 1923NAME (aout, swap_std_reloc_out) (bfd *abfd, 1924 arelent *g, 1925 struct reloc_std_external *natptr) 1926{ 1927 int r_index; 1928 asymbol *sym = *(g->sym_ptr_ptr); 1929 int r_extern; 1930 unsigned int r_length; 1931 int r_pcrel; 1932 int r_baserel, r_jmptable, r_relative; 1933 asection *output_section = sym->section->output_section; 1934 1935 PUT_WORD (abfd, g->address, natptr->r_address); 1936 1937 r_length = g->howto->size ; /* Size as a power of two. */ 1938 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 1939 /* XXX This relies on relocs coming from a.out files. */ 1940 r_baserel = (g->howto->type & 8) != 0; 1941 r_jmptable = (g->howto->type & 16) != 0; 1942 r_relative = (g->howto->type & 32) != 0; 1943 1944 /* Name was clobbered by aout_write_syms to be symbol index. */ 1945 1946 /* If this relocation is relative to a symbol then set the 1947 r_index to the symbols index, and the r_extern bit. 1948 1949 Absolute symbols can come in in two ways, either as an offset 1950 from the abs section, or as a symbol which has an abs value. 1951 check for that here. */ 1952 1953 if (bfd_is_com_section (output_section) 1954 || bfd_is_abs_section (output_section) 1955 || bfd_is_und_section (output_section) 1956 /* PR gas/3041 a.out relocs against weak symbols 1957 must be treated as if they were against externs. */ 1958 || (sym->flags & BSF_WEAK)) 1959 { 1960 if (bfd_abs_section_ptr->symbol == sym) 1961 { 1962 /* Whoops, looked like an abs symbol, but is 1963 really an offset from the abs section. */ 1964 r_index = N_ABS; 1965 r_extern = 0; 1966 } 1967 else 1968 { 1969 /* Fill in symbol. */ 1970 r_extern = 1; 1971 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 1972 } 1973 } 1974 else 1975 { 1976 /* Just an ordinary section. */ 1977 r_extern = 0; 1978 r_index = output_section->target_index; 1979 } 1980 1981 /* Now the fun stuff. */ 1982 if (bfd_header_big_endian (abfd)) 1983 { 1984 natptr->r_index[0] = r_index >> 16; 1985 natptr->r_index[1] = r_index >> 8; 1986 natptr->r_index[2] = r_index; 1987 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 1988 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 1989 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 1990 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 1991 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 1992 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 1993 } 1994 else 1995 { 1996 natptr->r_index[2] = r_index >> 16; 1997 natptr->r_index[1] = r_index >> 8; 1998 natptr->r_index[0] = r_index; 1999 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2000 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2001 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2002 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2003 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2004 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2005 } 2006} 2007 2008/* Extended stuff. */ 2009/* Output extended relocation information to a file in target byte order. */ 2010 2011extern void NAME (aout, swap_ext_reloc_out) 2012 (bfd *, arelent *, struct reloc_ext_external *); 2013 2014void 2015NAME (aout, swap_ext_reloc_out) (bfd *abfd, 2016 arelent *g, 2017 struct reloc_ext_external *natptr) 2018{ 2019 int r_index; 2020 int r_extern; 2021 unsigned int r_type; 2022 bfd_vma r_addend; 2023 asymbol *sym = *(g->sym_ptr_ptr); 2024 asection *output_section = sym->section->output_section; 2025 2026 PUT_WORD (abfd, g->address, natptr->r_address); 2027 2028 r_type = (unsigned int) g->howto->type; 2029 2030 r_addend = g->addend; 2031 if ((sym->flags & BSF_SECTION_SYM) != 0) 2032 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2033 2034 /* If this relocation is relative to a symbol then set the 2035 r_index to the symbols index, and the r_extern bit. 2036 2037 Absolute symbols can come in in two ways, either as an offset 2038 from the abs section, or as a symbol which has an abs value. 2039 check for that here. */ 2040 if (bfd_is_abs_section (bfd_get_section (sym))) 2041 { 2042 r_extern = 0; 2043 r_index = N_ABS; 2044 } 2045 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2046 { 2047 if (bfd_is_und_section (bfd_get_section (sym)) 2048 || (sym->flags & BSF_GLOBAL) != 0) 2049 r_extern = 1; 2050 else 2051 r_extern = 0; 2052 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2053 } 2054 else 2055 { 2056 /* Just an ordinary section. */ 2057 r_extern = 0; 2058 r_index = output_section->target_index; 2059 } 2060 2061 /* Now the fun stuff. */ 2062 if (bfd_header_big_endian (abfd)) 2063 { 2064 natptr->r_index[0] = r_index >> 16; 2065 natptr->r_index[1] = r_index >> 8; 2066 natptr->r_index[2] = r_index; 2067 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2068 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2069 } 2070 else 2071 { 2072 natptr->r_index[2] = r_index >> 16; 2073 natptr->r_index[1] = r_index >> 8; 2074 natptr->r_index[0] = r_index; 2075 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2076 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2077 } 2078 2079 PUT_WORD (abfd, r_addend, natptr->r_addend); 2080} 2081 2082/* BFD deals internally with all things based from the section they're 2083 in. so, something in 10 bytes into a text section with a base of 2084 50 would have a symbol (.text+10) and know .text vma was 50. 2085 2086 Aout keeps all it's symbols based from zero, so the symbol would 2087 contain 60. This macro subs the base of each section from the value 2088 to give the true offset from the section. */ 2089 2090#define MOVE_ADDRESS(ad) \ 2091 if (r_extern) \ 2092 { \ 2093 /* Undefined symbol. */ \ 2094 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2095 cache_ptr->addend = ad; \ 2096 } \ 2097 else \ 2098 { \ 2099 /* Defined, section relative. Replace symbol with pointer to \ 2100 symbol which points to section. */ \ 2101 switch (r_index) \ 2102 { \ 2103 case N_TEXT: \ 2104 case N_TEXT | N_EXT: \ 2105 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2106 cache_ptr->addend = ad - su->textsec->vma; \ 2107 break; \ 2108 case N_DATA: \ 2109 case N_DATA | N_EXT: \ 2110 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2111 cache_ptr->addend = ad - su->datasec->vma; \ 2112 break; \ 2113 case N_BSS: \ 2114 case N_BSS | N_EXT: \ 2115 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2116 cache_ptr->addend = ad - su->bsssec->vma; \ 2117 break; \ 2118 default: \ 2119 case N_ABS: \ 2120 case N_ABS | N_EXT: \ 2121 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2122 cache_ptr->addend = ad; \ 2123 break; \ 2124 } \ 2125 } 2126 2127void 2128NAME (aout, swap_ext_reloc_in) (bfd *abfd, 2129 struct reloc_ext_external *bytes, 2130 arelent *cache_ptr, 2131 asymbol **symbols, 2132 bfd_size_type symcount) 2133{ 2134 unsigned int r_index; 2135 int r_extern; 2136 unsigned int r_type; 2137 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2138 2139 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2140 2141 /* Now the fun stuff. */ 2142 if (bfd_header_big_endian (abfd)) 2143 { 2144 r_index = (((unsigned int) bytes->r_index[0] << 16) 2145 | ((unsigned int) bytes->r_index[1] << 8) 2146 | bytes->r_index[2]); 2147 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2148 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2149 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2150 } 2151 else 2152 { 2153 r_index = (((unsigned int) bytes->r_index[2] << 16) 2154 | ((unsigned int) bytes->r_index[1] << 8) 2155 | bytes->r_index[0]); 2156 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2157 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2158 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2159 } 2160 2161 cache_ptr->howto = howto_table_ext + r_type; 2162 2163 /* Base relative relocs are always against the symbol table, 2164 regardless of the setting of r_extern. r_extern just reflects 2165 whether the symbol the reloc is against is local or global. */ 2166 if (r_type == (unsigned int) RELOC_BASE10 2167 || r_type == (unsigned int) RELOC_BASE13 2168 || r_type == (unsigned int) RELOC_BASE22) 2169 r_extern = 1; 2170 2171 if (r_extern && r_index > symcount) 2172 { 2173 /* We could arrange to return an error, but it might be useful 2174 to see the file even if it is bad. */ 2175 r_extern = 0; 2176 r_index = N_ABS; 2177 } 2178 2179 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2180} 2181 2182void 2183NAME (aout, swap_std_reloc_in) (bfd *abfd, 2184 struct reloc_std_external *bytes, 2185 arelent *cache_ptr, 2186 asymbol **symbols, 2187 bfd_size_type symcount) 2188{ 2189 unsigned int r_index; 2190 int r_extern; 2191 unsigned int r_length; 2192 int r_pcrel; 2193 int r_baserel, r_jmptable, r_relative; 2194 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2195 unsigned int howto_idx; 2196 2197 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2198 2199 /* Now the fun stuff. */ 2200 if (bfd_header_big_endian (abfd)) 2201 { 2202 r_index = (((unsigned int) bytes->r_index[0] << 16) 2203 | ((unsigned int) bytes->r_index[1] << 8) 2204 | bytes->r_index[2]); 2205 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2206 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2207 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2208 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2209 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2210 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2211 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2212 } 2213 else 2214 { 2215 r_index = (((unsigned int) bytes->r_index[2] << 16) 2216 | ((unsigned int) bytes->r_index[1] << 8) 2217 | bytes->r_index[0]); 2218 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2219 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2220 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2221 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2222 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2223 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2224 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2225 } 2226 2227 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2228 + 16 * r_jmptable + 32 * r_relative); 2229 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 2230 cache_ptr->howto = howto_table_std + howto_idx; 2231 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); 2232 2233 /* Base relative relocs are always against the symbol table, 2234 regardless of the setting of r_extern. r_extern just reflects 2235 whether the symbol the reloc is against is local or global. */ 2236 if (r_baserel) 2237 r_extern = 1; 2238 2239 if (r_extern && r_index > symcount) 2240 { 2241 /* We could arrange to return an error, but it might be useful 2242 to see the file even if it is bad. */ 2243 r_extern = 0; 2244 r_index = N_ABS; 2245 } 2246 2247 MOVE_ADDRESS (0); 2248} 2249 2250/* Read and swap the relocs for a section. */ 2251 2252bfd_boolean 2253NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) 2254{ 2255 bfd_size_type count; 2256 bfd_size_type reloc_size; 2257 void * relocs; 2258 arelent *reloc_cache; 2259 size_t each_size; 2260 unsigned int counter = 0; 2261 arelent *cache_ptr; 2262 bfd_size_type amt; 2263 2264 if (asect->relocation) 2265 return TRUE; 2266 2267 if (asect->flags & SEC_CONSTRUCTOR) 2268 return TRUE; 2269 2270 if (asect == obj_datasec (abfd)) 2271 reloc_size = exec_hdr (abfd)->a_drsize; 2272 else if (asect == obj_textsec (abfd)) 2273 reloc_size = exec_hdr (abfd)->a_trsize; 2274 else if (asect == obj_bsssec (abfd)) 2275 reloc_size = 0; 2276 else 2277 { 2278 bfd_set_error (bfd_error_invalid_operation); 2279 return FALSE; 2280 } 2281 2282 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2283 return FALSE; 2284 2285 each_size = obj_reloc_entry_size (abfd); 2286 2287 count = reloc_size / each_size; 2288 2289 amt = count * sizeof (arelent); 2290 reloc_cache = bfd_zmalloc (amt); 2291 if (reloc_cache == NULL && count != 0) 2292 return FALSE; 2293 2294 relocs = bfd_malloc (reloc_size); 2295 if (relocs == NULL && reloc_size != 0) 2296 { 2297 free (reloc_cache); 2298 return FALSE; 2299 } 2300 2301 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2302 { 2303 free (relocs); 2304 free (reloc_cache); 2305 return FALSE; 2306 } 2307 2308 cache_ptr = reloc_cache; 2309 if (each_size == RELOC_EXT_SIZE) 2310 { 2311 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2312 2313 for (; counter < count; counter++, rptr++, cache_ptr++) 2314 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2315 (bfd_size_type) bfd_get_symcount (abfd)); 2316 } 2317 else 2318 { 2319 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2320 2321 for (; counter < count; counter++, rptr++, cache_ptr++) 2322 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2323 (bfd_size_type) bfd_get_symcount (abfd)); 2324 } 2325 2326 free (relocs); 2327 2328 asect->relocation = reloc_cache; 2329 asect->reloc_count = cache_ptr - reloc_cache; 2330 2331 return TRUE; 2332} 2333 2334/* Write out a relocation section into an object file. */ 2335 2336bfd_boolean 2337NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) 2338{ 2339 arelent **generic; 2340 unsigned char *native, *natptr; 2341 size_t each_size; 2342 2343 unsigned int count = section->reloc_count; 2344 bfd_size_type natsize; 2345 2346 if (count == 0 || section->orelocation == NULL) 2347 return TRUE; 2348 2349 each_size = obj_reloc_entry_size (abfd); 2350 natsize = (bfd_size_type) each_size * count; 2351 native = bfd_zalloc (abfd, natsize); 2352 if (!native) 2353 return FALSE; 2354 2355 generic = section->orelocation; 2356 2357 if (each_size == RELOC_EXT_SIZE) 2358 { 2359 for (natptr = native; 2360 count != 0; 2361 --count, natptr += each_size, ++generic) 2362 MY_swap_ext_reloc_out (abfd, *generic, 2363 (struct reloc_ext_external *) natptr); 2364 } 2365 else 2366 { 2367 for (natptr = native; 2368 count != 0; 2369 --count, natptr += each_size, ++generic) 2370 MY_swap_std_reloc_out (abfd, *generic, 2371 (struct reloc_std_external *) natptr); 2372 } 2373 2374 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) 2375 { 2376 bfd_release (abfd, native); 2377 return FALSE; 2378 } 2379 bfd_release (abfd, native); 2380 2381 return TRUE; 2382} 2383 2384/* This is stupid. This function should be a boolean predicate. */ 2385 2386long 2387NAME (aout, canonicalize_reloc) (bfd *abfd, 2388 sec_ptr section, 2389 arelent **relptr, 2390 asymbol **symbols) 2391{ 2392 arelent *tblptr = section->relocation; 2393 unsigned int count; 2394 2395 if (section == obj_bsssec (abfd)) 2396 { 2397 *relptr = NULL; 2398 return 0; 2399 } 2400 2401 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols))) 2402 return -1; 2403 2404 if (section->flags & SEC_CONSTRUCTOR) 2405 { 2406 arelent_chain *chain = section->constructor_chain; 2407 for (count = 0; count < section->reloc_count; count ++) 2408 { 2409 *relptr ++ = &chain->relent; 2410 chain = chain->next; 2411 } 2412 } 2413 else 2414 { 2415 tblptr = section->relocation; 2416 2417 for (count = 0; count++ < section->reloc_count; ) 2418 { 2419 *relptr++ = tblptr++; 2420 } 2421 } 2422 *relptr = 0; 2423 2424 return section->reloc_count; 2425} 2426 2427long 2428NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) 2429{ 2430 if (bfd_get_format (abfd) != bfd_object) 2431 { 2432 bfd_set_error (bfd_error_invalid_operation); 2433 return -1; 2434 } 2435 2436 if (asect->flags & SEC_CONSTRUCTOR) 2437 return sizeof (arelent *) * (asect->reloc_count + 1); 2438 2439 if (asect == obj_datasec (abfd)) 2440 return sizeof (arelent *) 2441 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2442 + 1); 2443 2444 if (asect == obj_textsec (abfd)) 2445 return sizeof (arelent *) 2446 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2447 + 1); 2448 2449 if (asect == obj_bsssec (abfd)) 2450 return sizeof (arelent *); 2451 2452 if (asect == obj_bsssec (abfd)) 2453 return 0; 2454 2455 bfd_set_error (bfd_error_invalid_operation); 2456 return -1; 2457} 2458 2459long 2460NAME (aout, get_symtab_upper_bound) (bfd *abfd) 2461{ 2462 if (!NAME (aout, slurp_symbol_table) (abfd)) 2463 return -1; 2464 2465 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2466} 2467 2468alent * 2469NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2470 asymbol *ignore_symbol ATTRIBUTE_UNUSED) 2471{ 2472 return NULL; 2473} 2474 2475void 2476NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2477 asymbol *symbol, 2478 symbol_info *ret) 2479{ 2480 bfd_symbol_info (symbol, ret); 2481 2482 if (ret->type == '?') 2483 { 2484 int type_code = aout_symbol (symbol)->type & 0xff; 2485 const char *stab_name = bfd_get_stab_name (type_code); 2486 static char buf[10]; 2487 2488 if (stab_name == NULL) 2489 { 2490 sprintf (buf, "(%d)", type_code); 2491 stab_name = buf; 2492 } 2493 ret->type = '-'; 2494 ret->stab_type = type_code; 2495 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2496 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2497 ret->stab_name = stab_name; 2498 } 2499} 2500 2501void 2502NAME (aout, print_symbol) (bfd *abfd, 2503 void * afile, 2504 asymbol *symbol, 2505 bfd_print_symbol_type how) 2506{ 2507 FILE *file = (FILE *)afile; 2508 2509 switch (how) 2510 { 2511 case bfd_print_symbol_name: 2512 if (symbol->name) 2513 fprintf (file,"%s", symbol->name); 2514 break; 2515 case bfd_print_symbol_more: 2516 fprintf (file,"%4x %2x %2x", 2517 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2518 (unsigned) (aout_symbol (symbol)->other & 0xff), 2519 (unsigned) (aout_symbol (symbol)->type)); 2520 break; 2521 case bfd_print_symbol_all: 2522 { 2523 const char *section_name = symbol->section->name; 2524 2525 bfd_print_symbol_vandf (abfd, (void *)file, symbol); 2526 2527 fprintf (file," %-5s %04x %02x %02x", 2528 section_name, 2529 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2530 (unsigned) (aout_symbol (symbol)->other & 0xff), 2531 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2532 if (symbol->name) 2533 fprintf (file," %s", symbol->name); 2534 } 2535 break; 2536 } 2537} 2538 2539/* If we don't have to allocate more than 1MB to hold the generic 2540 symbols, we use the generic minisymbol methord: it's faster, since 2541 it only translates the symbols once, not multiple times. */ 2542#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2543 2544/* Read minisymbols. For minisymbols, we use the unmodified a.out 2545 symbols. The minisymbol_to_symbol function translates these into 2546 BFD asymbol structures. */ 2547 2548long 2549NAME (aout, read_minisymbols) (bfd *abfd, 2550 bfd_boolean dynamic, 2551 void * *minisymsp, 2552 unsigned int *sizep) 2553{ 2554 if (dynamic) 2555 /* We could handle the dynamic symbols here as well, but it's 2556 easier to hand them off. */ 2557 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2558 2559 if (! aout_get_external_symbols (abfd)) 2560 return -1; 2561 2562 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2563 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2564 2565 *minisymsp = (void *) obj_aout_external_syms (abfd); 2566 2567 /* By passing the external symbols back from this routine, we are 2568 giving up control over the memory block. Clear 2569 obj_aout_external_syms, so that we do not try to free it 2570 ourselves. */ 2571 obj_aout_external_syms (abfd) = NULL; 2572 2573 *sizep = EXTERNAL_NLIST_SIZE; 2574 return obj_aout_external_sym_count (abfd); 2575} 2576 2577/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2578 unmodified a.out symbol. The SYM argument is a structure returned 2579 by bfd_make_empty_symbol, which we fill in here. */ 2580 2581asymbol * 2582NAME (aout, minisymbol_to_symbol) (bfd *abfd, 2583 bfd_boolean dynamic, 2584 const void * minisym, 2585 asymbol *sym) 2586{ 2587 if (dynamic 2588 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2589 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2590 2591 memset (sym, 0, sizeof (aout_symbol_type)); 2592 2593 /* We call translate_symbol_table to translate a single symbol. */ 2594 if (! (NAME (aout, translate_symbol_table) 2595 (abfd, 2596 (aout_symbol_type *) sym, 2597 (struct external_nlist *) minisym, 2598 (bfd_size_type) 1, 2599 obj_aout_external_strings (abfd), 2600 obj_aout_external_string_size (abfd), 2601 FALSE))) 2602 return NULL; 2603 2604 return sym; 2605} 2606 2607/* Provided a BFD, a section and an offset into the section, calculate 2608 and return the name of the source file and the line nearest to the 2609 wanted location. */ 2610 2611bfd_boolean 2612NAME (aout, find_nearest_line) (bfd *abfd, 2613 asection *section, 2614 asymbol **symbols, 2615 bfd_vma offset, 2616 const char **filename_ptr, 2617 const char **functionname_ptr, 2618 unsigned int *line_ptr) 2619{ 2620 /* Run down the file looking for the filename, function and linenumber. */ 2621 asymbol **p; 2622 const char *directory_name = NULL; 2623 const char *main_file_name = NULL; 2624 const char *current_file_name = NULL; 2625 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2626 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2627 bfd_vma low_line_vma = 0; 2628 bfd_vma low_func_vma = 0; 2629 asymbol *func = 0; 2630 bfd_size_type filelen, funclen; 2631 char *buf; 2632 2633 *filename_ptr = abfd->filename; 2634 *functionname_ptr = 0; 2635 *line_ptr = 0; 2636 2637 if (symbols != NULL) 2638 { 2639 for (p = symbols; *p; p++) 2640 { 2641 aout_symbol_type *q = (aout_symbol_type *) (*p); 2642 next: 2643 switch (q->type) 2644 { 2645 case N_TEXT: 2646 /* If this looks like a file name symbol, and it comes after 2647 the line number we have found so far, but before the 2648 offset, then we have probably not found the right line 2649 number. */ 2650 if (q->symbol.value <= offset 2651 && ((q->symbol.value > low_line_vma 2652 && (line_file_name != NULL 2653 || *line_ptr != 0)) 2654 || (q->symbol.value > low_func_vma 2655 && func != NULL))) 2656 { 2657 const char *symname; 2658 2659 symname = q->symbol.name; 2660 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2661 { 2662 if (q->symbol.value > low_line_vma) 2663 { 2664 *line_ptr = 0; 2665 line_file_name = NULL; 2666 } 2667 if (q->symbol.value > low_func_vma) 2668 func = NULL; 2669 } 2670 } 2671 break; 2672 2673 case N_SO: 2674 /* If this symbol is less than the offset, but greater than 2675 the line number we have found so far, then we have not 2676 found the right line number. */ 2677 if (q->symbol.value <= offset) 2678 { 2679 if (q->symbol.value > low_line_vma) 2680 { 2681 *line_ptr = 0; 2682 line_file_name = NULL; 2683 } 2684 if (q->symbol.value > low_func_vma) 2685 func = NULL; 2686 } 2687 2688 main_file_name = current_file_name = q->symbol.name; 2689 /* Look ahead to next symbol to check if that too is an N_SO. */ 2690 p++; 2691 if (*p == NULL) 2692 goto done; 2693 q = (aout_symbol_type *) (*p); 2694 if (q->type != (int)N_SO) 2695 goto next; 2696 2697 /* Found a second N_SO First is directory; second is filename. */ 2698 directory_name = current_file_name; 2699 main_file_name = current_file_name = q->symbol.name; 2700 if (obj_textsec (abfd) != section) 2701 goto done; 2702 break; 2703 case N_SOL: 2704 current_file_name = q->symbol.name; 2705 break; 2706 2707 case N_SLINE: 2708 2709 case N_DSLINE: 2710 case N_BSLINE: 2711 /* We'll keep this if it resolves nearer than the one we have 2712 already. */ 2713 if (q->symbol.value >= low_line_vma 2714 && q->symbol.value <= offset) 2715 { 2716 *line_ptr = q->desc; 2717 low_line_vma = q->symbol.value; 2718 line_file_name = current_file_name; 2719 line_directory_name = directory_name; 2720 } 2721 break; 2722 case N_FUN: 2723 { 2724 /* We'll keep this if it is nearer than the one we have already. */ 2725 if (q->symbol.value >= low_func_vma && 2726 q->symbol.value <= offset) 2727 { 2728 low_func_vma = q->symbol.value; 2729 func = (asymbol *)q; 2730 } 2731 else if (q->symbol.value > offset) 2732 goto done; 2733 } 2734 break; 2735 } 2736 } 2737 } 2738 2739 done: 2740 if (*line_ptr != 0) 2741 { 2742 main_file_name = line_file_name; 2743 directory_name = line_directory_name; 2744 } 2745 2746 if (main_file_name == NULL 2747 || IS_ABSOLUTE_PATH (main_file_name) 2748 || directory_name == NULL) 2749 filelen = 0; 2750 else 2751 filelen = strlen (directory_name) + strlen (main_file_name); 2752 2753 if (func == NULL) 2754 funclen = 0; 2755 else 2756 funclen = strlen (bfd_asymbol_name (func)); 2757 2758 if (adata (abfd).line_buf != NULL) 2759 free (adata (abfd).line_buf); 2760 2761 if (filelen + funclen == 0) 2762 adata (abfd).line_buf = buf = NULL; 2763 else 2764 { 2765 buf = bfd_malloc (filelen + funclen + 3); 2766 adata (abfd).line_buf = buf; 2767 if (buf == NULL) 2768 return FALSE; 2769 } 2770 2771 if (main_file_name != NULL) 2772 { 2773 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2774 *filename_ptr = main_file_name; 2775 else 2776 { 2777 sprintf (buf, "%s%s", directory_name, main_file_name); 2778 *filename_ptr = buf; 2779 buf += filelen + 1; 2780 } 2781 } 2782 2783 if (func) 2784 { 2785 const char *function = func->name; 2786 char *colon; 2787 2788 /* The caller expects a symbol name. We actually have a 2789 function name, without the leading underscore. Put the 2790 underscore back in, so that the caller gets a symbol name. */ 2791 if (bfd_get_symbol_leading_char (abfd) == '\0') 2792 strcpy (buf, function); 2793 else 2794 { 2795 buf[0] = bfd_get_symbol_leading_char (abfd); 2796 strcpy (buf + 1, function); 2797 } 2798 /* Have to remove : stuff. */ 2799 colon = strchr (buf, ':'); 2800 if (colon != NULL) 2801 *colon = '\0'; 2802 *functionname_ptr = buf; 2803 } 2804 2805 return TRUE; 2806} 2807 2808int 2809NAME (aout, sizeof_headers) (bfd *abfd, 2810 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2811{ 2812 return adata (abfd).exec_bytes_size; 2813} 2814 2815/* Free all information we have cached for this BFD. We can always 2816 read it again later if we need it. */ 2817 2818bfd_boolean 2819NAME (aout, bfd_free_cached_info) (bfd *abfd) 2820{ 2821 asection *o; 2822 2823 if (bfd_get_format (abfd) != bfd_object 2824 || abfd->tdata.aout_data == NULL) 2825 return TRUE; 2826 2827#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2828 BFCI_FREE (obj_aout_symbols (abfd)); 2829#ifdef USE_MMAP 2830 obj_aout_external_syms (abfd) = 0; 2831 bfd_free_window (&obj_aout_sym_window (abfd)); 2832 bfd_free_window (&obj_aout_string_window (abfd)); 2833 obj_aout_external_strings (abfd) = 0; 2834#else 2835 BFCI_FREE (obj_aout_external_syms (abfd)); 2836 BFCI_FREE (obj_aout_external_strings (abfd)); 2837#endif 2838 for (o = abfd->sections; o != NULL; o = o->next) 2839 BFCI_FREE (o->relocation); 2840#undef BFCI_FREE 2841 2842 return TRUE; 2843} 2844 2845/* a.out link code. */ 2846 2847/* Routine to create an entry in an a.out link hash table. */ 2848 2849struct bfd_hash_entry * 2850NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, 2851 struct bfd_hash_table *table, 2852 const char *string) 2853{ 2854 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2855 2856 /* Allocate the structure if it has not already been allocated by a 2857 subclass. */ 2858 if (ret == NULL) 2859 ret = bfd_hash_allocate (table, sizeof (* ret)); 2860 if (ret == NULL) 2861 return NULL; 2862 2863 /* Call the allocation method of the superclass. */ 2864 ret = ((struct aout_link_hash_entry *) 2865 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2866 table, string)); 2867 if (ret) 2868 { 2869 /* Set local fields. */ 2870 ret->written = FALSE; 2871 ret->indx = -1; 2872 } 2873 2874 return (struct bfd_hash_entry *) ret; 2875} 2876 2877/* Initialize an a.out link hash table. */ 2878 2879bfd_boolean 2880NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, 2881 bfd *abfd, 2882 struct bfd_hash_entry *(*newfunc) 2883 (struct bfd_hash_entry *, struct bfd_hash_table *, 2884 const char *), 2885 unsigned int entsize) 2886{ 2887 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); 2888} 2889 2890/* Create an a.out link hash table. */ 2891 2892struct bfd_link_hash_table * 2893NAME (aout, link_hash_table_create) (bfd *abfd) 2894{ 2895 struct aout_link_hash_table *ret; 2896 bfd_size_type amt = sizeof (* ret); 2897 2898 ret = bfd_malloc (amt); 2899 if (ret == NULL) 2900 return NULL; 2901 2902 if (!NAME (aout, link_hash_table_init) (ret, abfd, 2903 NAME (aout, link_hash_newfunc), 2904 sizeof (struct aout_link_hash_entry))) 2905 { 2906 free (ret); 2907 return NULL; 2908 } 2909 return &ret->root; 2910} 2911 2912/* Add all symbols from an object file to the hash table. */ 2913 2914static bfd_boolean 2915aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) 2916{ 2917 bfd_boolean (*add_one_symbol) 2918 (struct bfd_link_info *, bfd *, const char *, flagword, asection *, 2919 bfd_vma, const char *, bfd_boolean, bfd_boolean, 2920 struct bfd_link_hash_entry **); 2921 struct external_nlist *syms; 2922 bfd_size_type sym_count; 2923 char *strings; 2924 bfd_boolean copy; 2925 struct aout_link_hash_entry **sym_hash; 2926 struct external_nlist *p; 2927 struct external_nlist *pend; 2928 bfd_size_type amt; 2929 2930 syms = obj_aout_external_syms (abfd); 2931 sym_count = obj_aout_external_sym_count (abfd); 2932 strings = obj_aout_external_strings (abfd); 2933 if (info->keep_memory) 2934 copy = FALSE; 2935 else 2936 copy = TRUE; 2937 2938 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 2939 { 2940 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 2941 (abfd, info, &syms, &sym_count, &strings))) 2942 return FALSE; 2943 } 2944 2945 /* We keep a list of the linker hash table entries that correspond 2946 to particular symbols. We could just look them up in the hash 2947 table, but keeping the list is more efficient. Perhaps this 2948 should be conditional on info->keep_memory. */ 2949 amt = sym_count * sizeof (struct aout_link_hash_entry *); 2950 sym_hash = bfd_alloc (abfd, amt); 2951 if (sym_hash == NULL && sym_count != 0) 2952 return FALSE; 2953 obj_aout_sym_hashes (abfd) = sym_hash; 2954 2955 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 2956 if (add_one_symbol == NULL) 2957 add_one_symbol = _bfd_generic_link_add_one_symbol; 2958 2959 p = syms; 2960 pend = p + sym_count; 2961 for (; p < pend; p++, sym_hash++) 2962 { 2963 int type; 2964 const char *name; 2965 bfd_vma value; 2966 asection *section; 2967 flagword flags; 2968 const char *string; 2969 2970 *sym_hash = NULL; 2971 2972 type = H_GET_8 (abfd, p->e_type); 2973 2974 /* Ignore debugging symbols. */ 2975 if ((type & N_STAB) != 0) 2976 continue; 2977 2978 name = strings + GET_WORD (abfd, p->e_strx); 2979 value = GET_WORD (abfd, p->e_value); 2980 flags = BSF_GLOBAL; 2981 string = NULL; 2982 switch (type) 2983 { 2984 default: 2985 abort (); 2986 2987 case N_UNDF: 2988 case N_ABS: 2989 case N_TEXT: 2990 case N_DATA: 2991 case N_BSS: 2992 case N_FN_SEQ: 2993 case N_COMM: 2994 case N_SETV: 2995 case N_FN: 2996 /* Ignore symbols that are not externally visible. */ 2997 continue; 2998 case N_INDR: 2999 /* Ignore local indirect symbol. */ 3000 ++p; 3001 ++sym_hash; 3002 continue; 3003 3004 case N_UNDF | N_EXT: 3005 if (value == 0) 3006 { 3007 section = bfd_und_section_ptr; 3008 flags = 0; 3009 } 3010 else 3011 section = bfd_com_section_ptr; 3012 break; 3013 case N_ABS | N_EXT: 3014 section = bfd_abs_section_ptr; 3015 break; 3016 case N_TEXT | N_EXT: 3017 section = obj_textsec (abfd); 3018 value -= bfd_get_section_vma (abfd, section); 3019 break; 3020 case N_DATA | N_EXT: 3021 case N_SETV | N_EXT: 3022 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3023 translate_from_native_sym_flags. */ 3024 section = obj_datasec (abfd); 3025 value -= bfd_get_section_vma (abfd, section); 3026 break; 3027 case N_BSS | N_EXT: 3028 section = obj_bsssec (abfd); 3029 value -= bfd_get_section_vma (abfd, section); 3030 break; 3031 case N_INDR | N_EXT: 3032 /* An indirect symbol. The next symbol is the symbol 3033 which this one really is. */ 3034 BFD_ASSERT (p + 1 < pend); 3035 ++p; 3036 string = strings + GET_WORD (abfd, p->e_strx); 3037 section = bfd_ind_section_ptr; 3038 flags |= BSF_INDIRECT; 3039 break; 3040 case N_COMM | N_EXT: 3041 section = bfd_com_section_ptr; 3042 break; 3043 case N_SETA: case N_SETA | N_EXT: 3044 section = bfd_abs_section_ptr; 3045 flags |= BSF_CONSTRUCTOR; 3046 break; 3047 case N_SETT: case N_SETT | N_EXT: 3048 section = obj_textsec (abfd); 3049 flags |= BSF_CONSTRUCTOR; 3050 value -= bfd_get_section_vma (abfd, section); 3051 break; 3052 case N_SETD: case N_SETD | N_EXT: 3053 section = obj_datasec (abfd); 3054 flags |= BSF_CONSTRUCTOR; 3055 value -= bfd_get_section_vma (abfd, section); 3056 break; 3057 case N_SETB: case N_SETB | N_EXT: 3058 section = obj_bsssec (abfd); 3059 flags |= BSF_CONSTRUCTOR; 3060 value -= bfd_get_section_vma (abfd, section); 3061 break; 3062 case N_WARNING: 3063 /* A warning symbol. The next symbol is the one to warn 3064 about. If there is no next symbol, just look away. */ 3065 if (p + 1 >= pend) 3066 return TRUE; 3067 ++p; 3068 string = name; 3069 name = strings + GET_WORD (abfd, p->e_strx); 3070 section = bfd_und_section_ptr; 3071 flags |= BSF_WARNING; 3072 break; 3073 case N_WEAKU: 3074 section = bfd_und_section_ptr; 3075 flags = BSF_WEAK; 3076 break; 3077 case N_WEAKA: 3078 section = bfd_abs_section_ptr; 3079 flags = BSF_WEAK; 3080 break; 3081 case N_WEAKT: 3082 section = obj_textsec (abfd); 3083 value -= bfd_get_section_vma (abfd, section); 3084 flags = BSF_WEAK; 3085 break; 3086 case N_WEAKD: 3087 section = obj_datasec (abfd); 3088 value -= bfd_get_section_vma (abfd, section); 3089 flags = BSF_WEAK; 3090 break; 3091 case N_WEAKB: 3092 section = obj_bsssec (abfd); 3093 value -= bfd_get_section_vma (abfd, section); 3094 flags = BSF_WEAK; 3095 break; 3096 } 3097 3098 if (! ((*add_one_symbol) 3099 (info, abfd, name, flags, section, value, string, copy, FALSE, 3100 (struct bfd_link_hash_entry **) sym_hash))) 3101 return FALSE; 3102 3103 /* Restrict the maximum alignment of a common symbol based on 3104 the architecture, since a.out has no way to represent 3105 alignment requirements of a section in a .o file. FIXME: 3106 This isn't quite right: it should use the architecture of the 3107 output file, not the input files. */ 3108 if ((*sym_hash)->root.type == bfd_link_hash_common 3109 && ((*sym_hash)->root.u.c.p->alignment_power > 3110 bfd_get_arch_info (abfd)->section_align_power)) 3111 (*sym_hash)->root.u.c.p->alignment_power = 3112 bfd_get_arch_info (abfd)->section_align_power; 3113 3114 /* If this is a set symbol, and we are not building sets, then 3115 it is possible for the hash entry to not have been set. In 3116 such a case, treat the symbol as not globally defined. */ 3117 if ((*sym_hash)->root.type == bfd_link_hash_new) 3118 { 3119 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3120 *sym_hash = NULL; 3121 } 3122 3123 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3124 ++sym_hash; 3125 } 3126 3127 return TRUE; 3128} 3129 3130/* Free up the internal symbols read from an a.out file. */ 3131 3132static bfd_boolean 3133aout_link_free_symbols (bfd *abfd) 3134{ 3135 if (obj_aout_external_syms (abfd) != NULL) 3136 { 3137#ifdef USE_MMAP 3138 bfd_free_window (&obj_aout_sym_window (abfd)); 3139#else 3140 free ((void *) obj_aout_external_syms (abfd)); 3141#endif 3142 obj_aout_external_syms (abfd) = NULL; 3143 } 3144 if (obj_aout_external_strings (abfd) != NULL) 3145 { 3146#ifdef USE_MMAP 3147 bfd_free_window (&obj_aout_string_window (abfd)); 3148#else 3149 free ((void *) obj_aout_external_strings (abfd)); 3150#endif 3151 obj_aout_external_strings (abfd) = NULL; 3152 } 3153 return TRUE; 3154} 3155 3156/* Add symbols from an a.out object file. */ 3157 3158static bfd_boolean 3159aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) 3160{ 3161 if (! aout_get_external_symbols (abfd)) 3162 return FALSE; 3163 if (! aout_link_add_symbols (abfd, info)) 3164 return FALSE; 3165 if (! info->keep_memory) 3166 { 3167 if (! aout_link_free_symbols (abfd)) 3168 return FALSE; 3169 } 3170 return TRUE; 3171} 3172 3173/* Look through the internal symbols to see if this object file should 3174 be included in the link. We should include this object file if it 3175 defines any symbols which are currently undefined. If this object 3176 file defines a common symbol, then we may adjust the size of the 3177 known symbol but we do not include the object file in the link 3178 (unless there is some other reason to include it). */ 3179 3180static bfd_boolean 3181aout_link_check_ar_symbols (bfd *abfd, 3182 struct bfd_link_info *info, 3183 bfd_boolean *pneeded) 3184{ 3185 struct external_nlist *p; 3186 struct external_nlist *pend; 3187 char *strings; 3188 3189 *pneeded = FALSE; 3190 3191 /* Look through all the symbols. */ 3192 p = obj_aout_external_syms (abfd); 3193 pend = p + obj_aout_external_sym_count (abfd); 3194 strings = obj_aout_external_strings (abfd); 3195 for (; p < pend; p++) 3196 { 3197 int type = H_GET_8 (abfd, p->e_type); 3198 const char *name; 3199 struct bfd_link_hash_entry *h; 3200 3201 /* Ignore symbols that are not externally visible. This is an 3202 optimization only, as we check the type more thoroughly 3203 below. */ 3204 if (((type & N_EXT) == 0 3205 || (type & N_STAB) != 0 3206 || type == N_FN) 3207 && type != N_WEAKA 3208 && type != N_WEAKT 3209 && type != N_WEAKD 3210 && type != N_WEAKB) 3211 { 3212 if (type == N_WARNING 3213 || type == N_INDR) 3214 ++p; 3215 continue; 3216 } 3217 3218 name = strings + GET_WORD (abfd, p->e_strx); 3219 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 3220 3221 /* We are only interested in symbols that are currently 3222 undefined or common. */ 3223 if (h == NULL 3224 || (h->type != bfd_link_hash_undefined 3225 && h->type != bfd_link_hash_common)) 3226 { 3227 if (type == (N_INDR | N_EXT)) 3228 ++p; 3229 continue; 3230 } 3231 3232 if (type == (N_TEXT | N_EXT) 3233 || type == (N_DATA | N_EXT) 3234 || type == (N_BSS | N_EXT) 3235 || type == (N_ABS | N_EXT) 3236 || type == (N_INDR | N_EXT)) 3237 { 3238 /* This object file defines this symbol. We must link it 3239 in. This is true regardless of whether the current 3240 definition of the symbol is undefined or common. 3241 3242 If the current definition is common, we have a case in 3243 which we have already seen an object file including: 3244 int a; 3245 and this object file from the archive includes: 3246 int a = 5; 3247 In such a case, whether to include this object is target 3248 dependant for backward compatibility. 3249 3250 FIXME: The SunOS 4.1.3 linker will pull in the archive 3251 element if the symbol is defined in the .data section, 3252 but not if it is defined in the .text section. That 3253 seems a bit crazy to me, and it has not been implemented 3254 yet. However, it might be correct. */ 3255 if (h->type == bfd_link_hash_common) 3256 { 3257 int skip = 0; 3258 3259 switch (info->common_skip_ar_aymbols) 3260 { 3261 case bfd_link_common_skip_text: 3262 skip = (type == (N_TEXT | N_EXT)); 3263 break; 3264 case bfd_link_common_skip_data: 3265 skip = (type == (N_DATA | N_EXT)); 3266 break; 3267 default: 3268 case bfd_link_common_skip_all: 3269 skip = 1; 3270 break; 3271 } 3272 3273 if (skip) 3274 continue; 3275 } 3276 3277 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3278 return FALSE; 3279 *pneeded = TRUE; 3280 return TRUE; 3281 } 3282 3283 if (type == (N_UNDF | N_EXT)) 3284 { 3285 bfd_vma value; 3286 3287 value = GET_WORD (abfd, p->e_value); 3288 if (value != 0) 3289 { 3290 /* This symbol is common in the object from the archive 3291 file. */ 3292 if (h->type == bfd_link_hash_undefined) 3293 { 3294 bfd *symbfd; 3295 unsigned int power; 3296 3297 symbfd = h->u.undef.abfd; 3298 if (symbfd == NULL) 3299 { 3300 /* This symbol was created as undefined from 3301 outside BFD. We assume that we should link 3302 in the object file. This is done for the -u 3303 option in the linker. */ 3304 if (! (*info->callbacks->add_archive_element) (info, 3305 abfd, 3306 name)) 3307 return FALSE; 3308 *pneeded = TRUE; 3309 return TRUE; 3310 } 3311 /* Turn the current link symbol into a common 3312 symbol. It is already on the undefs list. */ 3313 h->type = bfd_link_hash_common; 3314 h->u.c.p = bfd_hash_allocate (&info->hash->table, 3315 sizeof (struct bfd_link_hash_common_entry)); 3316 if (h->u.c.p == NULL) 3317 return FALSE; 3318 3319 h->u.c.size = value; 3320 3321 /* FIXME: This isn't quite right. The maximum 3322 alignment of a common symbol should be set by the 3323 architecture of the output file, not of the input 3324 file. */ 3325 power = bfd_log2 (value); 3326 if (power > bfd_get_arch_info (abfd)->section_align_power) 3327 power = bfd_get_arch_info (abfd)->section_align_power; 3328 h->u.c.p->alignment_power = power; 3329 3330 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3331 "COMMON"); 3332 } 3333 else 3334 { 3335 /* Adjust the size of the common symbol if 3336 necessary. */ 3337 if (value > h->u.c.size) 3338 h->u.c.size = value; 3339 } 3340 } 3341 } 3342 3343 if (type == N_WEAKA 3344 || type == N_WEAKT 3345 || type == N_WEAKD 3346 || type == N_WEAKB) 3347 { 3348 /* This symbol is weak but defined. We must pull it in if 3349 the current link symbol is undefined, but we don't want 3350 it if the current link symbol is common. */ 3351 if (h->type == bfd_link_hash_undefined) 3352 { 3353 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3354 return FALSE; 3355 *pneeded = TRUE; 3356 return TRUE; 3357 } 3358 } 3359 } 3360 3361 /* We do not need this object file. */ 3362 return TRUE; 3363} 3364/* Check a single archive element to see if we need to include it in 3365 the link. *PNEEDED is set according to whether this element is 3366 needed in the link or not. This is called from 3367 _bfd_generic_link_add_archive_symbols. */ 3368 3369static bfd_boolean 3370aout_link_check_archive_element (bfd *abfd, 3371 struct bfd_link_info *info, 3372 bfd_boolean *pneeded) 3373{ 3374 if (! aout_get_external_symbols (abfd)) 3375 return FALSE; 3376 3377 if (! aout_link_check_ar_symbols (abfd, info, pneeded)) 3378 return FALSE; 3379 3380 if (*pneeded) 3381 { 3382 if (! aout_link_add_symbols (abfd, info)) 3383 return FALSE; 3384 } 3385 3386 if (! info->keep_memory || ! *pneeded) 3387 { 3388 if (! aout_link_free_symbols (abfd)) 3389 return FALSE; 3390 } 3391 3392 return TRUE; 3393} 3394 3395/* Given an a.out BFD, add symbols to the global hash table as 3396 appropriate. */ 3397 3398bfd_boolean 3399NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) 3400{ 3401 switch (bfd_get_format (abfd)) 3402 { 3403 case bfd_object: 3404 return aout_link_add_object_symbols (abfd, info); 3405 case bfd_archive: 3406 return _bfd_generic_link_add_archive_symbols 3407 (abfd, info, aout_link_check_archive_element); 3408 default: 3409 bfd_set_error (bfd_error_wrong_format); 3410 return FALSE; 3411 } 3412} 3413 3414/* A hash table used for header files with N_BINCL entries. */ 3415 3416struct aout_link_includes_table 3417{ 3418 struct bfd_hash_table root; 3419}; 3420 3421/* A linked list of totals that we have found for a particular header 3422 file. */ 3423 3424struct aout_link_includes_totals 3425{ 3426 struct aout_link_includes_totals *next; 3427 bfd_vma total; 3428}; 3429 3430/* An entry in the header file hash table. */ 3431 3432struct aout_link_includes_entry 3433{ 3434 struct bfd_hash_entry root; 3435 /* List of totals we have found for this file. */ 3436 struct aout_link_includes_totals *totals; 3437}; 3438 3439/* Look up an entry in an the header file hash table. */ 3440 3441#define aout_link_includes_lookup(table, string, create, copy) \ 3442 ((struct aout_link_includes_entry *) \ 3443 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3444 3445/* During the final link step we need to pass around a bunch of 3446 information, so we do it in an instance of this structure. */ 3447 3448struct aout_final_link_info 3449{ 3450 /* General link information. */ 3451 struct bfd_link_info *info; 3452 /* Output bfd. */ 3453 bfd *output_bfd; 3454 /* Reloc file positions. */ 3455 file_ptr treloff, dreloff; 3456 /* File position of symbols. */ 3457 file_ptr symoff; 3458 /* String table. */ 3459 struct bfd_strtab_hash *strtab; 3460 /* Header file hash table. */ 3461 struct aout_link_includes_table includes; 3462 /* A buffer large enough to hold the contents of any section. */ 3463 bfd_byte *contents; 3464 /* A buffer large enough to hold the relocs of any section. */ 3465 void * relocs; 3466 /* A buffer large enough to hold the symbol map of any input BFD. */ 3467 int *symbol_map; 3468 /* A buffer large enough to hold output symbols of any input BFD. */ 3469 struct external_nlist *output_syms; 3470}; 3471 3472/* The function to create a new entry in the header file hash table. */ 3473 3474static struct bfd_hash_entry * 3475aout_link_includes_newfunc (struct bfd_hash_entry *entry, 3476 struct bfd_hash_table *table, 3477 const char *string) 3478{ 3479 struct aout_link_includes_entry *ret = 3480 (struct aout_link_includes_entry *) entry; 3481 3482 /* Allocate the structure if it has not already been allocated by a 3483 subclass. */ 3484 if (ret == NULL) 3485 ret = bfd_hash_allocate (table, sizeof (* ret)); 3486 if (ret == NULL) 3487 return NULL; 3488 3489 /* Call the allocation method of the superclass. */ 3490 ret = ((struct aout_link_includes_entry *) 3491 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3492 if (ret) 3493 { 3494 /* Set local fields. */ 3495 ret->totals = NULL; 3496 } 3497 3498 return (struct bfd_hash_entry *) ret; 3499} 3500 3501/* Write out a symbol that was not associated with an a.out input 3502 object. */ 3503 3504static bfd_boolean 3505aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data) 3506{ 3507 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; 3508 bfd *output_bfd; 3509 int type; 3510 bfd_vma val; 3511 struct external_nlist outsym; 3512 bfd_size_type indx; 3513 bfd_size_type amt; 3514 3515 if (h->root.type == bfd_link_hash_warning) 3516 { 3517 h = (struct aout_link_hash_entry *) h->root.u.i.link; 3518 if (h->root.type == bfd_link_hash_new) 3519 return TRUE; 3520 } 3521 3522 output_bfd = finfo->output_bfd; 3523 3524 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 3525 { 3526 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 3527 (output_bfd, finfo->info, h))) 3528 { 3529 /* FIXME: No way to handle errors. */ 3530 abort (); 3531 } 3532 } 3533 3534 if (h->written) 3535 return TRUE; 3536 3537 h->written = TRUE; 3538 3539 /* An indx of -2 means the symbol must be written. */ 3540 if (h->indx != -2 3541 && (finfo->info->strip == strip_all 3542 || (finfo->info->strip == strip_some 3543 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, 3544 FALSE, FALSE) == NULL))) 3545 return TRUE; 3546 3547 switch (h->root.type) 3548 { 3549 default: 3550 case bfd_link_hash_warning: 3551 abort (); 3552 /* Avoid variable not initialized warnings. */ 3553 return TRUE; 3554 case bfd_link_hash_new: 3555 /* This can happen for set symbols when sets are not being 3556 built. */ 3557 return TRUE; 3558 case bfd_link_hash_undefined: 3559 type = N_UNDF | N_EXT; 3560 val = 0; 3561 break; 3562 case bfd_link_hash_defined: 3563 case bfd_link_hash_defweak: 3564 { 3565 asection *sec; 3566 3567 sec = h->root.u.def.section->output_section; 3568 BFD_ASSERT (bfd_is_abs_section (sec) 3569 || sec->owner == output_bfd); 3570 if (sec == obj_textsec (output_bfd)) 3571 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 3572 else if (sec == obj_datasec (output_bfd)) 3573 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 3574 else if (sec == obj_bsssec (output_bfd)) 3575 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 3576 else 3577 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 3578 type |= N_EXT; 3579 val = (h->root.u.def.value 3580 + sec->vma 3581 + h->root.u.def.section->output_offset); 3582 } 3583 break; 3584 case bfd_link_hash_common: 3585 type = N_UNDF | N_EXT; 3586 val = h->root.u.c.size; 3587 break; 3588 case bfd_link_hash_undefweak: 3589 type = N_WEAKU; 3590 val = 0; 3591 case bfd_link_hash_indirect: 3592 /* We ignore these symbols, since the indirected symbol is 3593 already in the hash table. */ 3594 return TRUE; 3595 } 3596 3597 H_PUT_8 (output_bfd, type, outsym.e_type); 3598 H_PUT_8 (output_bfd, 0, outsym.e_other); 3599 H_PUT_16 (output_bfd, 0, outsym.e_desc); 3600 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, 3601 FALSE); 3602 if (indx == - (bfd_size_type) 1) 3603 /* FIXME: No way to handle errors. */ 3604 abort (); 3605 3606 PUT_WORD (output_bfd, indx, outsym.e_strx); 3607 PUT_WORD (output_bfd, val, outsym.e_value); 3608 3609 amt = EXTERNAL_NLIST_SIZE; 3610 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 3611 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) 3612 /* FIXME: No way to handle errors. */ 3613 abort (); 3614 3615 finfo->symoff += EXTERNAL_NLIST_SIZE; 3616 h->indx = obj_aout_external_sym_count (output_bfd); 3617 ++obj_aout_external_sym_count (output_bfd); 3618 3619 return TRUE; 3620} 3621 3622/* Handle a link order which is supposed to generate a reloc. */ 3623 3624static bfd_boolean 3625aout_link_reloc_link_order (struct aout_final_link_info *finfo, 3626 asection *o, 3627 struct bfd_link_order *p) 3628{ 3629 struct bfd_link_order_reloc *pr; 3630 int r_index; 3631 int r_extern; 3632 reloc_howto_type *howto; 3633 file_ptr *reloff_ptr = NULL; 3634 struct reloc_std_external srel; 3635 struct reloc_ext_external erel; 3636 void * rel_ptr; 3637 bfd_size_type amt; 3638 3639 pr = p->u.reloc.p; 3640 3641 if (p->type == bfd_section_reloc_link_order) 3642 { 3643 r_extern = 0; 3644 if (bfd_is_abs_section (pr->u.section)) 3645 r_index = N_ABS | N_EXT; 3646 else 3647 { 3648 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); 3649 r_index = pr->u.section->target_index; 3650 } 3651 } 3652 else 3653 { 3654 struct aout_link_hash_entry *h; 3655 3656 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 3657 r_extern = 1; 3658 h = ((struct aout_link_hash_entry *) 3659 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, 3660 pr->u.name, FALSE, FALSE, TRUE)); 3661 if (h != NULL 3662 && h->indx >= 0) 3663 r_index = h->indx; 3664 else if (h != NULL) 3665 { 3666 /* We decided to strip this symbol, but it turns out that we 3667 can't. Note that we lose the other and desc information 3668 here. I don't think that will ever matter for a global 3669 symbol. */ 3670 h->indx = -2; 3671 h->written = FALSE; 3672 if (! aout_link_write_other_symbol (h, (void *) finfo)) 3673 return FALSE; 3674 r_index = h->indx; 3675 } 3676 else 3677 { 3678 if (! ((*finfo->info->callbacks->unattached_reloc) 3679 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0))) 3680 return FALSE; 3681 r_index = 0; 3682 } 3683 } 3684 3685 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); 3686 if (howto == 0) 3687 { 3688 bfd_set_error (bfd_error_bad_value); 3689 return FALSE; 3690 } 3691 3692 if (o == obj_textsec (finfo->output_bfd)) 3693 reloff_ptr = &finfo->treloff; 3694 else if (o == obj_datasec (finfo->output_bfd)) 3695 reloff_ptr = &finfo->dreloff; 3696 else 3697 abort (); 3698 3699 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) 3700 { 3701#ifdef MY_put_reloc 3702 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto, 3703 &srel); 3704#else 3705 { 3706 int r_pcrel; 3707 int r_baserel; 3708 int r_jmptable; 3709 int r_relative; 3710 int r_length; 3711 3712 r_pcrel = (int) howto->pc_relative; 3713 r_baserel = (howto->type & 8) != 0; 3714 r_jmptable = (howto->type & 16) != 0; 3715 r_relative = (howto->type & 32) != 0; 3716 r_length = howto->size; 3717 3718 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); 3719 if (bfd_header_big_endian (finfo->output_bfd)) 3720 { 3721 srel.r_index[0] = r_index >> 16; 3722 srel.r_index[1] = r_index >> 8; 3723 srel.r_index[2] = r_index; 3724 srel.r_type[0] = 3725 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 3726 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 3727 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 3728 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 3729 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 3730 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 3731 } 3732 else 3733 { 3734 srel.r_index[2] = r_index >> 16; 3735 srel.r_index[1] = r_index >> 8; 3736 srel.r_index[0] = r_index; 3737 srel.r_type[0] = 3738 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 3739 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 3740 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 3741 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 3742 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 3743 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 3744 } 3745 } 3746#endif 3747 rel_ptr = (void *) &srel; 3748 3749 /* We have to write the addend into the object file, since 3750 standard a.out relocs are in place. It would be more 3751 reliable if we had the current contents of the file here, 3752 rather than assuming zeroes, but we can't read the file since 3753 it was opened using bfd_openw. */ 3754 if (pr->addend != 0) 3755 { 3756 bfd_size_type size; 3757 bfd_reloc_status_type r; 3758 bfd_byte *buf; 3759 bfd_boolean ok; 3760 3761 size = bfd_get_reloc_size (howto); 3762 buf = bfd_zmalloc (size); 3763 if (buf == NULL) 3764 return FALSE; 3765 r = MY_relocate_contents (howto, finfo->output_bfd, 3766 (bfd_vma) pr->addend, buf); 3767 switch (r) 3768 { 3769 case bfd_reloc_ok: 3770 break; 3771 default: 3772 case bfd_reloc_outofrange: 3773 abort (); 3774 case bfd_reloc_overflow: 3775 if (! ((*finfo->info->callbacks->reloc_overflow) 3776 (finfo->info, NULL, 3777 (p->type == bfd_section_reloc_link_order 3778 ? bfd_section_name (finfo->output_bfd, 3779 pr->u.section) 3780 : pr->u.name), 3781 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0))) 3782 { 3783 free (buf); 3784 return FALSE; 3785 } 3786 break; 3787 } 3788 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf, 3789 (file_ptr) p->offset, size); 3790 free (buf); 3791 if (! ok) 3792 return FALSE; 3793 } 3794 } 3795 else 3796 { 3797#ifdef MY_put_ext_reloc 3798 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset, 3799 howto, &erel, pr->addend); 3800#else 3801 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); 3802 3803 if (bfd_header_big_endian (finfo->output_bfd)) 3804 { 3805 erel.r_index[0] = r_index >> 16; 3806 erel.r_index[1] = r_index >> 8; 3807 erel.r_index[2] = r_index; 3808 erel.r_type[0] = 3809 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 3810 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 3811 } 3812 else 3813 { 3814 erel.r_index[2] = r_index >> 16; 3815 erel.r_index[1] = r_index >> 8; 3816 erel.r_index[0] = r_index; 3817 erel.r_type[0] = 3818 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 3819 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 3820 } 3821 3822 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 3823#endif /* MY_put_ext_reloc */ 3824 3825 rel_ptr = (void *) &erel; 3826 } 3827 3828 amt = obj_reloc_entry_size (finfo->output_bfd); 3829 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 3830 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt) 3831 return FALSE; 3832 3833 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); 3834 3835 /* Assert that the relocs have not run into the symbols, and that n 3836 the text relocs have not run into the data relocs. */ 3837 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 3838 && (reloff_ptr != &finfo->treloff 3839 || (*reloff_ptr 3840 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 3841 3842 return TRUE; 3843} 3844 3845/* Get the section corresponding to a reloc index. */ 3846 3847static INLINE asection * 3848aout_reloc_index_to_section (bfd *abfd, int indx) 3849{ 3850 switch (indx & N_TYPE) 3851 { 3852 case N_TEXT: return obj_textsec (abfd); 3853 case N_DATA: return obj_datasec (abfd); 3854 case N_BSS: return obj_bsssec (abfd); 3855 case N_ABS: 3856 case N_UNDF: return bfd_abs_section_ptr; 3857 default: abort (); 3858 } 3859 return NULL; 3860} 3861 3862/* Relocate an a.out section using standard a.out relocs. */ 3863 3864static bfd_boolean 3865aout_link_input_section_std (struct aout_final_link_info *finfo, 3866 bfd *input_bfd, 3867 asection *input_section, 3868 struct reloc_std_external *relocs, 3869 bfd_size_type rel_size, 3870 bfd_byte *contents) 3871{ 3872 bfd_boolean (*check_dynamic_reloc) 3873 (struct bfd_link_info *, bfd *, asection *, 3874 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 3875 bfd_vma *); 3876 bfd *output_bfd; 3877 bfd_boolean relocatable; 3878 struct external_nlist *syms; 3879 char *strings; 3880 struct aout_link_hash_entry **sym_hashes; 3881 int *symbol_map; 3882 bfd_size_type reloc_count; 3883 struct reloc_std_external *rel; 3884 struct reloc_std_external *rel_end; 3885 3886 output_bfd = finfo->output_bfd; 3887 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 3888 3889 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 3890 BFD_ASSERT (input_bfd->xvec->header_byteorder 3891 == output_bfd->xvec->header_byteorder); 3892 3893 relocatable = finfo->info->relocatable; 3894 syms = obj_aout_external_syms (input_bfd); 3895 strings = obj_aout_external_strings (input_bfd); 3896 sym_hashes = obj_aout_sym_hashes (input_bfd); 3897 symbol_map = finfo->symbol_map; 3898 3899 reloc_count = rel_size / RELOC_STD_SIZE; 3900 rel = relocs; 3901 rel_end = rel + reloc_count; 3902 for (; rel < rel_end; rel++) 3903 { 3904 bfd_vma r_addr; 3905 int r_index; 3906 int r_extern; 3907 int r_pcrel; 3908 int r_baserel = 0; 3909 reloc_howto_type *howto; 3910 struct aout_link_hash_entry *h = NULL; 3911 bfd_vma relocation; 3912 bfd_reloc_status_type r; 3913 3914 r_addr = GET_SWORD (input_bfd, rel->r_address); 3915 3916#ifdef MY_reloc_howto 3917 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 3918#else 3919 { 3920 int r_jmptable; 3921 int r_relative; 3922 int r_length; 3923 unsigned int howto_idx; 3924 3925 if (bfd_header_big_endian (input_bfd)) 3926 { 3927 r_index = (((unsigned int) rel->r_index[0] << 16) 3928 | ((unsigned int) rel->r_index[1] << 8) 3929 | rel->r_index[2]); 3930 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 3931 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 3932 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 3933 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 3934 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 3935 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 3936 >> RELOC_STD_BITS_LENGTH_SH_BIG); 3937 } 3938 else 3939 { 3940 r_index = (((unsigned int) rel->r_index[2] << 16) 3941 | ((unsigned int) rel->r_index[1] << 8) 3942 | rel->r_index[0]); 3943 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 3944 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 3945 r_baserel = (0 != (rel->r_type[0] 3946 & RELOC_STD_BITS_BASEREL_LITTLE)); 3947 r_jmptable= (0 != (rel->r_type[0] 3948 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 3949 r_relative= (0 != (rel->r_type[0] 3950 & RELOC_STD_BITS_RELATIVE_LITTLE)); 3951 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 3952 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 3953 } 3954 3955 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 3956 + 16 * r_jmptable + 32 * r_relative); 3957 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 3958 howto = howto_table_std + howto_idx; 3959 } 3960#endif 3961 3962 if (relocatable) 3963 { 3964 /* We are generating a relocatable output file, and must 3965 modify the reloc accordingly. */ 3966 if (r_extern) 3967 { 3968 /* If we know the symbol this relocation is against, 3969 convert it into a relocation against a section. This 3970 is what the native linker does. */ 3971 h = sym_hashes[r_index]; 3972 if (h != NULL 3973 && (h->root.type == bfd_link_hash_defined 3974 || h->root.type == bfd_link_hash_defweak)) 3975 { 3976 asection *output_section; 3977 3978 /* Change the r_extern value. */ 3979 if (bfd_header_big_endian (output_bfd)) 3980 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 3981 else 3982 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 3983 3984 /* Compute a new r_index. */ 3985 output_section = h->root.u.def.section->output_section; 3986 if (output_section == obj_textsec (output_bfd)) 3987 r_index = N_TEXT; 3988 else if (output_section == obj_datasec (output_bfd)) 3989 r_index = N_DATA; 3990 else if (output_section == obj_bsssec (output_bfd)) 3991 r_index = N_BSS; 3992 else 3993 r_index = N_ABS; 3994 3995 /* Add the symbol value and the section VMA to the 3996 addend stored in the contents. */ 3997 relocation = (h->root.u.def.value 3998 + output_section->vma 3999 + h->root.u.def.section->output_offset); 4000 } 4001 else 4002 { 4003 /* We must change r_index according to the symbol 4004 map. */ 4005 r_index = symbol_map[r_index]; 4006 4007 if (r_index == -1) 4008 { 4009 if (h != NULL) 4010 { 4011 /* We decided to strip this symbol, but it 4012 turns out that we can't. Note that we 4013 lose the other and desc information here. 4014 I don't think that will ever matter for a 4015 global symbol. */ 4016 if (h->indx < 0) 4017 { 4018 h->indx = -2; 4019 h->written = FALSE; 4020 if (! aout_link_write_other_symbol (h, 4021 (void *) finfo)) 4022 return FALSE; 4023 } 4024 r_index = h->indx; 4025 } 4026 else 4027 { 4028 const char *name; 4029 4030 name = strings + GET_WORD (input_bfd, 4031 syms[r_index].e_strx); 4032 if (! ((*finfo->info->callbacks->unattached_reloc) 4033 (finfo->info, name, input_bfd, input_section, 4034 r_addr))) 4035 return FALSE; 4036 r_index = 0; 4037 } 4038 } 4039 4040 relocation = 0; 4041 } 4042 4043 /* Write out the new r_index value. */ 4044 if (bfd_header_big_endian (output_bfd)) 4045 { 4046 rel->r_index[0] = r_index >> 16; 4047 rel->r_index[1] = r_index >> 8; 4048 rel->r_index[2] = r_index; 4049 } 4050 else 4051 { 4052 rel->r_index[2] = r_index >> 16; 4053 rel->r_index[1] = r_index >> 8; 4054 rel->r_index[0] = r_index; 4055 } 4056 } 4057 else 4058 { 4059 asection *section; 4060 4061 /* This is a relocation against a section. We must 4062 adjust by the amount that the section moved. */ 4063 section = aout_reloc_index_to_section (input_bfd, r_index); 4064 relocation = (section->output_section->vma 4065 + section->output_offset 4066 - section->vma); 4067 } 4068 4069 /* Change the address of the relocation. */ 4070 PUT_WORD (output_bfd, 4071 r_addr + input_section->output_offset, 4072 rel->r_address); 4073 4074 /* Adjust a PC relative relocation by removing the reference 4075 to the original address in the section and including the 4076 reference to the new address. */ 4077 if (r_pcrel) 4078 relocation -= (input_section->output_section->vma 4079 + input_section->output_offset 4080 - input_section->vma); 4081 4082#ifdef MY_relocatable_reloc 4083 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4084#endif 4085 4086 if (relocation == 0) 4087 r = bfd_reloc_ok; 4088 else 4089 r = MY_relocate_contents (howto, 4090 input_bfd, relocation, 4091 contents + r_addr); 4092 } 4093 else 4094 { 4095 bfd_boolean hundef; 4096 4097 /* We are generating an executable, and must do a full 4098 relocation. */ 4099 hundef = FALSE; 4100 4101 if (r_extern) 4102 { 4103 h = sym_hashes[r_index]; 4104 4105 if (h != NULL 4106 && (h->root.type == bfd_link_hash_defined 4107 || h->root.type == bfd_link_hash_defweak)) 4108 { 4109 relocation = (h->root.u.def.value 4110 + h->root.u.def.section->output_section->vma 4111 + h->root.u.def.section->output_offset); 4112 } 4113 else if (h != NULL 4114 && h->root.type == bfd_link_hash_undefweak) 4115 relocation = 0; 4116 else 4117 { 4118 hundef = TRUE; 4119 relocation = 0; 4120 } 4121 } 4122 else 4123 { 4124 asection *section; 4125 4126 section = aout_reloc_index_to_section (input_bfd, r_index); 4127 relocation = (section->output_section->vma 4128 + section->output_offset 4129 - section->vma); 4130 if (r_pcrel) 4131 relocation += input_section->vma; 4132 } 4133 4134 if (check_dynamic_reloc != NULL) 4135 { 4136 bfd_boolean skip; 4137 4138 if (! ((*check_dynamic_reloc) 4139 (finfo->info, input_bfd, input_section, h, 4140 (void *) rel, contents, &skip, &relocation))) 4141 return FALSE; 4142 if (skip) 4143 continue; 4144 } 4145 4146 /* Now warn if a global symbol is undefined. We could not 4147 do this earlier, because check_dynamic_reloc might want 4148 to skip this reloc. */ 4149 if (hundef && ! finfo->info->shared && ! r_baserel) 4150 { 4151 const char *name; 4152 4153 if (h != NULL) 4154 name = h->root.root.string; 4155 else 4156 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4157 if (! ((*finfo->info->callbacks->undefined_symbol) 4158 (finfo->info, name, input_bfd, input_section, 4159 r_addr, TRUE))) 4160 return FALSE; 4161 } 4162 4163 r = MY_final_link_relocate (howto, 4164 input_bfd, input_section, 4165 contents, r_addr, relocation, 4166 (bfd_vma) 0); 4167 } 4168 4169 if (r != bfd_reloc_ok) 4170 { 4171 switch (r) 4172 { 4173 default: 4174 case bfd_reloc_outofrange: 4175 abort (); 4176 case bfd_reloc_overflow: 4177 { 4178 const char *name; 4179 4180 if (h != NULL) 4181 name = NULL; 4182 else if (r_extern) 4183 name = strings + GET_WORD (input_bfd, 4184 syms[r_index].e_strx); 4185 else 4186 { 4187 asection *s; 4188 4189 s = aout_reloc_index_to_section (input_bfd, r_index); 4190 name = bfd_section_name (input_bfd, s); 4191 } 4192 if (! ((*finfo->info->callbacks->reloc_overflow) 4193 (finfo->info, (h ? &h->root : NULL), name, 4194 howto->name, (bfd_vma) 0, input_bfd, 4195 input_section, r_addr))) 4196 return FALSE; 4197 } 4198 break; 4199 } 4200 } 4201 } 4202 4203 return TRUE; 4204} 4205 4206/* Relocate an a.out section using extended a.out relocs. */ 4207 4208static bfd_boolean 4209aout_link_input_section_ext (struct aout_final_link_info *finfo, 4210 bfd *input_bfd, 4211 asection *input_section, 4212 struct reloc_ext_external *relocs, 4213 bfd_size_type rel_size, 4214 bfd_byte *contents) 4215{ 4216 bfd_boolean (*check_dynamic_reloc) 4217 (struct bfd_link_info *, bfd *, asection *, 4218 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 4219 bfd_vma *); 4220 bfd *output_bfd; 4221 bfd_boolean relocatable; 4222 struct external_nlist *syms; 4223 char *strings; 4224 struct aout_link_hash_entry **sym_hashes; 4225 int *symbol_map; 4226 bfd_size_type reloc_count; 4227 struct reloc_ext_external *rel; 4228 struct reloc_ext_external *rel_end; 4229 4230 output_bfd = finfo->output_bfd; 4231 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4232 4233 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 4234 BFD_ASSERT (input_bfd->xvec->header_byteorder 4235 == output_bfd->xvec->header_byteorder); 4236 4237 relocatable = finfo->info->relocatable; 4238 syms = obj_aout_external_syms (input_bfd); 4239 strings = obj_aout_external_strings (input_bfd); 4240 sym_hashes = obj_aout_sym_hashes (input_bfd); 4241 symbol_map = finfo->symbol_map; 4242 4243 reloc_count = rel_size / RELOC_EXT_SIZE; 4244 rel = relocs; 4245 rel_end = rel + reloc_count; 4246 for (; rel < rel_end; rel++) 4247 { 4248 bfd_vma r_addr; 4249 int r_index; 4250 int r_extern; 4251 unsigned int r_type; 4252 bfd_vma r_addend; 4253 struct aout_link_hash_entry *h = NULL; 4254 asection *r_section = NULL; 4255 bfd_vma relocation; 4256 4257 r_addr = GET_SWORD (input_bfd, rel->r_address); 4258 4259 if (bfd_header_big_endian (input_bfd)) 4260 { 4261 r_index = (((unsigned int) rel->r_index[0] << 16) 4262 | ((unsigned int) rel->r_index[1] << 8) 4263 | rel->r_index[2]); 4264 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 4265 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 4266 >> RELOC_EXT_BITS_TYPE_SH_BIG); 4267 } 4268 else 4269 { 4270 r_index = (((unsigned int) rel->r_index[2] << 16) 4271 | ((unsigned int) rel->r_index[1] << 8) 4272 | rel->r_index[0]); 4273 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 4274 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 4275 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 4276 } 4277 4278 r_addend = GET_SWORD (input_bfd, rel->r_addend); 4279 4280 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); 4281 4282 if (relocatable) 4283 { 4284 /* We are generating a relocatable output file, and must 4285 modify the reloc accordingly. */ 4286 if (r_extern 4287 || r_type == (unsigned int) RELOC_BASE10 4288 || r_type == (unsigned int) RELOC_BASE13 4289 || r_type == (unsigned int) RELOC_BASE22) 4290 { 4291 /* If we know the symbol this relocation is against, 4292 convert it into a relocation against a section. This 4293 is what the native linker does. */ 4294 if (r_type == (unsigned int) RELOC_BASE10 4295 || r_type == (unsigned int) RELOC_BASE13 4296 || r_type == (unsigned int) RELOC_BASE22) 4297 h = NULL; 4298 else 4299 h = sym_hashes[r_index]; 4300 if (h != NULL 4301 && (h->root.type == bfd_link_hash_defined 4302 || h->root.type == bfd_link_hash_defweak)) 4303 { 4304 asection *output_section; 4305 4306 /* Change the r_extern value. */ 4307 if (bfd_header_big_endian (output_bfd)) 4308 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 4309 else 4310 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 4311 4312 /* Compute a new r_index. */ 4313 output_section = h->root.u.def.section->output_section; 4314 if (output_section == obj_textsec (output_bfd)) 4315 r_index = N_TEXT; 4316 else if (output_section == obj_datasec (output_bfd)) 4317 r_index = N_DATA; 4318 else if (output_section == obj_bsssec (output_bfd)) 4319 r_index = N_BSS; 4320 else 4321 r_index = N_ABS; 4322 4323 /* Add the symbol value and the section VMA to the 4324 addend. */ 4325 relocation = (h->root.u.def.value 4326 + output_section->vma 4327 + h->root.u.def.section->output_offset); 4328 4329 /* Now RELOCATION is the VMA of the final 4330 destination. If this is a PC relative reloc, 4331 then ADDEND is the negative of the source VMA. 4332 We want to set ADDEND to the difference between 4333 the destination VMA and the source VMA, which 4334 means we must adjust RELOCATION by the change in 4335 the source VMA. This is done below. */ 4336 } 4337 else 4338 { 4339 /* We must change r_index according to the symbol 4340 map. */ 4341 r_index = symbol_map[r_index]; 4342 4343 if (r_index == -1) 4344 { 4345 if (h != NULL) 4346 { 4347 /* We decided to strip this symbol, but it 4348 turns out that we can't. Note that we 4349 lose the other and desc information here. 4350 I don't think that will ever matter for a 4351 global symbol. */ 4352 if (h->indx < 0) 4353 { 4354 h->indx = -2; 4355 h->written = FALSE; 4356 if (! aout_link_write_other_symbol (h, 4357 (void *) finfo)) 4358 return FALSE; 4359 } 4360 r_index = h->indx; 4361 } 4362 else 4363 { 4364 const char *name; 4365 4366 name = strings + GET_WORD (input_bfd, 4367 syms[r_index].e_strx); 4368 if (! ((*finfo->info->callbacks->unattached_reloc) 4369 (finfo->info, name, input_bfd, input_section, 4370 r_addr))) 4371 return FALSE; 4372 r_index = 0; 4373 } 4374 } 4375 4376 relocation = 0; 4377 4378 /* If this is a PC relative reloc, then the addend 4379 is the negative of the source VMA. We must 4380 adjust it by the change in the source VMA. This 4381 is done below. */ 4382 } 4383 4384 /* Write out the new r_index value. */ 4385 if (bfd_header_big_endian (output_bfd)) 4386 { 4387 rel->r_index[0] = r_index >> 16; 4388 rel->r_index[1] = r_index >> 8; 4389 rel->r_index[2] = r_index; 4390 } 4391 else 4392 { 4393 rel->r_index[2] = r_index >> 16; 4394 rel->r_index[1] = r_index >> 8; 4395 rel->r_index[0] = r_index; 4396 } 4397 } 4398 else 4399 { 4400 /* This is a relocation against a section. We must 4401 adjust by the amount that the section moved. */ 4402 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4403 relocation = (r_section->output_section->vma 4404 + r_section->output_offset 4405 - r_section->vma); 4406 4407 /* If this is a PC relative reloc, then the addend is 4408 the difference in VMA between the destination and the 4409 source. We have just adjusted for the change in VMA 4410 of the destination, so we must also adjust by the 4411 change in VMA of the source. This is done below. */ 4412 } 4413 4414 /* As described above, we must always adjust a PC relative 4415 reloc by the change in VMA of the source. However, if 4416 pcrel_offset is set, then the addend does not include the 4417 location within the section, in which case we don't need 4418 to adjust anything. */ 4419 if (howto_table_ext[r_type].pc_relative 4420 && ! howto_table_ext[r_type].pcrel_offset) 4421 relocation -= (input_section->output_section->vma 4422 + input_section->output_offset 4423 - input_section->vma); 4424 4425 /* Change the addend if necessary. */ 4426 if (relocation != 0) 4427 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 4428 4429 /* Change the address of the relocation. */ 4430 PUT_WORD (output_bfd, 4431 r_addr + input_section->output_offset, 4432 rel->r_address); 4433 } 4434 else 4435 { 4436 bfd_boolean hundef; 4437 bfd_reloc_status_type r; 4438 4439 /* We are generating an executable, and must do a full 4440 relocation. */ 4441 hundef = FALSE; 4442 4443 if (r_extern) 4444 { 4445 h = sym_hashes[r_index]; 4446 4447 if (h != NULL 4448 && (h->root.type == bfd_link_hash_defined 4449 || h->root.type == bfd_link_hash_defweak)) 4450 { 4451 relocation = (h->root.u.def.value 4452 + h->root.u.def.section->output_section->vma 4453 + h->root.u.def.section->output_offset); 4454 } 4455 else if (h != NULL 4456 && h->root.type == bfd_link_hash_undefweak) 4457 relocation = 0; 4458 else 4459 { 4460 hundef = TRUE; 4461 relocation = 0; 4462 } 4463 } 4464 else if (r_type == (unsigned int) RELOC_BASE10 4465 || r_type == (unsigned int) RELOC_BASE13 4466 || r_type == (unsigned int) RELOC_BASE22) 4467 { 4468 struct external_nlist *sym; 4469 int type; 4470 4471 /* For base relative relocs, r_index is always an index 4472 into the symbol table, even if r_extern is 0. */ 4473 sym = syms + r_index; 4474 type = H_GET_8 (input_bfd, sym->e_type); 4475 if ((type & N_TYPE) == N_TEXT 4476 || type == N_WEAKT) 4477 r_section = obj_textsec (input_bfd); 4478 else if ((type & N_TYPE) == N_DATA 4479 || type == N_WEAKD) 4480 r_section = obj_datasec (input_bfd); 4481 else if ((type & N_TYPE) == N_BSS 4482 || type == N_WEAKB) 4483 r_section = obj_bsssec (input_bfd); 4484 else if ((type & N_TYPE) == N_ABS 4485 || type == N_WEAKA) 4486 r_section = bfd_abs_section_ptr; 4487 else 4488 abort (); 4489 relocation = (r_section->output_section->vma 4490 + r_section->output_offset 4491 + (GET_WORD (input_bfd, sym->e_value) 4492 - r_section->vma)); 4493 } 4494 else 4495 { 4496 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4497 4498 /* If this is a PC relative reloc, then R_ADDEND is the 4499 difference between the two vmas, or 4500 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 4501 where 4502 old_dest_sec == section->vma 4503 and 4504 old_src_sec == input_section->vma 4505 and 4506 old_src_off == r_addr 4507 4508 _bfd_final_link_relocate expects RELOCATION + 4509 R_ADDEND to be the VMA of the destination minus 4510 r_addr (the minus r_addr is because this relocation 4511 is not pcrel_offset, which is a bit confusing and 4512 should, perhaps, be changed), or 4513 new_dest_sec 4514 where 4515 new_dest_sec == output_section->vma + output_offset 4516 We arrange for this to happen by setting RELOCATION to 4517 new_dest_sec + old_src_sec - old_dest_sec 4518 4519 If this is not a PC relative reloc, then R_ADDEND is 4520 simply the VMA of the destination, so we set 4521 RELOCATION to the change in the destination VMA, or 4522 new_dest_sec - old_dest_sec 4523 */ 4524 relocation = (r_section->output_section->vma 4525 + r_section->output_offset 4526 - r_section->vma); 4527 if (howto_table_ext[r_type].pc_relative) 4528 relocation += input_section->vma; 4529 } 4530 4531 if (check_dynamic_reloc != NULL) 4532 { 4533 bfd_boolean skip; 4534 4535 if (! ((*check_dynamic_reloc) 4536 (finfo->info, input_bfd, input_section, h, 4537 (void *) rel, contents, &skip, &relocation))) 4538 return FALSE; 4539 if (skip) 4540 continue; 4541 } 4542 4543 /* Now warn if a global symbol is undefined. We could not 4544 do this earlier, because check_dynamic_reloc might want 4545 to skip this reloc. */ 4546 if (hundef 4547 && ! finfo->info->shared 4548 && r_type != (unsigned int) RELOC_BASE10 4549 && r_type != (unsigned int) RELOC_BASE13 4550 && r_type != (unsigned int) RELOC_BASE22) 4551 { 4552 const char *name; 4553 4554 if (h != NULL) 4555 name = h->root.root.string; 4556 else 4557 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4558 if (! ((*finfo->info->callbacks->undefined_symbol) 4559 (finfo->info, name, input_bfd, input_section, 4560 r_addr, TRUE))) 4561 return FALSE; 4562 } 4563 4564 if (r_type != (unsigned int) RELOC_SPARC_REV32) 4565 r = MY_final_link_relocate (howto_table_ext + r_type, 4566 input_bfd, input_section, 4567 contents, r_addr, relocation, 4568 r_addend); 4569 else 4570 { 4571 bfd_vma x; 4572 4573 x = bfd_get_32 (input_bfd, contents + r_addr); 4574 x = x + relocation + r_addend; 4575 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 4576 r = bfd_reloc_ok; 4577 } 4578 4579 if (r != bfd_reloc_ok) 4580 { 4581 switch (r) 4582 { 4583 default: 4584 case bfd_reloc_outofrange: 4585 abort (); 4586 case bfd_reloc_overflow: 4587 { 4588 const char *name; 4589 4590 if (h != NULL) 4591 name = NULL; 4592 else if (r_extern 4593 || r_type == (unsigned int) RELOC_BASE10 4594 || r_type == (unsigned int) RELOC_BASE13 4595 || r_type == (unsigned int) RELOC_BASE22) 4596 name = strings + GET_WORD (input_bfd, 4597 syms[r_index].e_strx); 4598 else 4599 { 4600 asection *s; 4601 4602 s = aout_reloc_index_to_section (input_bfd, r_index); 4603 name = bfd_section_name (input_bfd, s); 4604 } 4605 if (! ((*finfo->info->callbacks->reloc_overflow) 4606 (finfo->info, (h ? &h->root : NULL), name, 4607 howto_table_ext[r_type].name, 4608 r_addend, input_bfd, input_section, r_addr))) 4609 return FALSE; 4610 } 4611 break; 4612 } 4613 } 4614 } 4615 } 4616 4617 return TRUE; 4618} 4619 4620/* Link an a.out section into the output file. */ 4621 4622static bfd_boolean 4623aout_link_input_section (struct aout_final_link_info *finfo, 4624 bfd *input_bfd, 4625 asection *input_section, 4626 file_ptr *reloff_ptr, 4627 bfd_size_type rel_size) 4628{ 4629 bfd_size_type input_size; 4630 void * relocs; 4631 4632 /* Get the section contents. */ 4633 input_size = input_section->size; 4634 if (! bfd_get_section_contents (input_bfd, input_section, 4635 (void *) finfo->contents, 4636 (file_ptr) 0, input_size)) 4637 return FALSE; 4638 4639 /* Read in the relocs if we haven't already done it. */ 4640 if (aout_section_data (input_section) != NULL 4641 && aout_section_data (input_section)->relocs != NULL) 4642 relocs = aout_section_data (input_section)->relocs; 4643 else 4644 { 4645 relocs = finfo->relocs; 4646 if (rel_size > 0) 4647 { 4648 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4649 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4650 return FALSE; 4651 } 4652 } 4653 4654 /* Relocate the section contents. */ 4655 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4656 { 4657 if (! aout_link_input_section_std (finfo, input_bfd, input_section, 4658 (struct reloc_std_external *) relocs, 4659 rel_size, finfo->contents)) 4660 return FALSE; 4661 } 4662 else 4663 { 4664 if (! aout_link_input_section_ext (finfo, input_bfd, input_section, 4665 (struct reloc_ext_external *) relocs, 4666 rel_size, finfo->contents)) 4667 return FALSE; 4668 } 4669 4670 /* Write out the section contents. */ 4671 if (! bfd_set_section_contents (finfo->output_bfd, 4672 input_section->output_section, 4673 (void *) finfo->contents, 4674 (file_ptr) input_section->output_offset, 4675 input_size)) 4676 return FALSE; 4677 4678 /* If we are producing relocatable output, the relocs were 4679 modified, and we now write them out. */ 4680 if (finfo->info->relocatable && rel_size > 0) 4681 { 4682 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4683 return FALSE; 4684 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size) 4685 return FALSE; 4686 *reloff_ptr += rel_size; 4687 4688 /* Assert that the relocs have not run into the symbols, and 4689 that if these are the text relocs they have not run into the 4690 data relocs. */ 4691 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 4692 && (reloff_ptr != &finfo->treloff 4693 || (*reloff_ptr 4694 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 4695 } 4696 4697 return TRUE; 4698} 4699 4700/* Adjust and write out the symbols for an a.out file. Set the new 4701 symbol indices into a symbol_map. */ 4702 4703static bfd_boolean 4704aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd) 4705{ 4706 bfd *output_bfd; 4707 bfd_size_type sym_count; 4708 char *strings; 4709 enum bfd_link_strip strip; 4710 enum bfd_link_discard discard; 4711 struct external_nlist *outsym; 4712 bfd_size_type strtab_index; 4713 struct external_nlist *sym; 4714 struct external_nlist *sym_end; 4715 struct aout_link_hash_entry **sym_hash; 4716 int *symbol_map; 4717 bfd_boolean pass; 4718 bfd_boolean skip_next; 4719 4720 output_bfd = finfo->output_bfd; 4721 sym_count = obj_aout_external_sym_count (input_bfd); 4722 strings = obj_aout_external_strings (input_bfd); 4723 strip = finfo->info->strip; 4724 discard = finfo->info->discard; 4725 outsym = finfo->output_syms; 4726 4727 /* First write out a symbol for this object file, unless we are 4728 discarding such symbols. */ 4729 if (strip != strip_all 4730 && (strip != strip_some 4731 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, 4732 FALSE, FALSE) != NULL) 4733 && discard != discard_all) 4734 { 4735 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4736 H_PUT_8 (output_bfd, 0, outsym->e_other); 4737 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4738 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4739 input_bfd->filename, FALSE); 4740 if (strtab_index == (bfd_size_type) -1) 4741 return FALSE; 4742 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4743 PUT_WORD (output_bfd, 4744 (bfd_get_section_vma (output_bfd, 4745 obj_textsec (input_bfd)->output_section) 4746 + obj_textsec (input_bfd)->output_offset), 4747 outsym->e_value); 4748 ++obj_aout_external_sym_count (output_bfd); 4749 ++outsym; 4750 } 4751 4752 pass = FALSE; 4753 skip_next = FALSE; 4754 sym = obj_aout_external_syms (input_bfd); 4755 sym_end = sym + sym_count; 4756 sym_hash = obj_aout_sym_hashes (input_bfd); 4757 symbol_map = finfo->symbol_map; 4758 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4759 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4760 { 4761 const char *name; 4762 int type; 4763 struct aout_link_hash_entry *h; 4764 bfd_boolean skip; 4765 asection *symsec; 4766 bfd_vma val = 0; 4767 bfd_boolean copy; 4768 4769 /* We set *symbol_map to 0 above for all symbols. If it has 4770 already been set to -1 for this symbol, it means that we are 4771 discarding it because it appears in a duplicate header file. 4772 See the N_BINCL code below. */ 4773 if (*symbol_map == -1) 4774 continue; 4775 4776 /* Initialize *symbol_map to -1, which means that the symbol was 4777 not copied into the output file. We will change it later if 4778 we do copy the symbol over. */ 4779 *symbol_map = -1; 4780 4781 type = H_GET_8 (input_bfd, sym->e_type); 4782 name = strings + GET_WORD (input_bfd, sym->e_strx); 4783 4784 h = NULL; 4785 4786 if (pass) 4787 { 4788 /* Pass this symbol through. It is the target of an 4789 indirect or warning symbol. */ 4790 val = GET_WORD (input_bfd, sym->e_value); 4791 pass = FALSE; 4792 } 4793 else if (skip_next) 4794 { 4795 /* Skip this symbol, which is the target of an indirect 4796 symbol that we have changed to no longer be an indirect 4797 symbol. */ 4798 skip_next = FALSE; 4799 continue; 4800 } 4801 else 4802 { 4803 struct aout_link_hash_entry *hresolve; 4804 4805 /* We have saved the hash table entry for this symbol, if 4806 there is one. Note that we could just look it up again 4807 in the hash table, provided we first check that it is an 4808 external symbol. */ 4809 h = *sym_hash; 4810 4811 /* Use the name from the hash table, in case the symbol was 4812 wrapped. */ 4813 if (h != NULL 4814 && h->root.type != bfd_link_hash_warning) 4815 name = h->root.root.string; 4816 4817 /* If this is an indirect or warning symbol, then change 4818 hresolve to the base symbol. We also change *sym_hash so 4819 that the relocation routines relocate against the real 4820 symbol. */ 4821 hresolve = h; 4822 if (h != (struct aout_link_hash_entry *) NULL 4823 && (h->root.type == bfd_link_hash_indirect 4824 || h->root.type == bfd_link_hash_warning)) 4825 { 4826 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4827 while (hresolve->root.type == bfd_link_hash_indirect 4828 || hresolve->root.type == bfd_link_hash_warning) 4829 hresolve = ((struct aout_link_hash_entry *) 4830 hresolve->root.u.i.link); 4831 *sym_hash = hresolve; 4832 } 4833 4834 /* If the symbol has already been written out, skip it. */ 4835 if (h != NULL 4836 && h->written) 4837 { 4838 if ((type & N_TYPE) == N_INDR 4839 || type == N_WARNING) 4840 skip_next = TRUE; 4841 *symbol_map = h->indx; 4842 continue; 4843 } 4844 4845 /* See if we are stripping this symbol. */ 4846 skip = FALSE; 4847 switch (strip) 4848 { 4849 case strip_none: 4850 break; 4851 case strip_debugger: 4852 if ((type & N_STAB) != 0) 4853 skip = TRUE; 4854 break; 4855 case strip_some: 4856 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) 4857 == NULL) 4858 skip = TRUE; 4859 break; 4860 case strip_all: 4861 skip = TRUE; 4862 break; 4863 } 4864 if (skip) 4865 { 4866 if (h != NULL) 4867 h->written = TRUE; 4868 continue; 4869 } 4870 4871 /* Get the value of the symbol. */ 4872 if ((type & N_TYPE) == N_TEXT 4873 || type == N_WEAKT) 4874 symsec = obj_textsec (input_bfd); 4875 else if ((type & N_TYPE) == N_DATA 4876 || type == N_WEAKD) 4877 symsec = obj_datasec (input_bfd); 4878 else if ((type & N_TYPE) == N_BSS 4879 || type == N_WEAKB) 4880 symsec = obj_bsssec (input_bfd); 4881 else if ((type & N_TYPE) == N_ABS 4882 || type == N_WEAKA) 4883 symsec = bfd_abs_section_ptr; 4884 else if (((type & N_TYPE) == N_INDR 4885 && (hresolve == NULL 4886 || (hresolve->root.type != bfd_link_hash_defined 4887 && hresolve->root.type != bfd_link_hash_defweak 4888 && hresolve->root.type != bfd_link_hash_common))) 4889 || type == N_WARNING) 4890 { 4891 /* Pass the next symbol through unchanged. The 4892 condition above for indirect symbols is so that if 4893 the indirect symbol was defined, we output it with 4894 the correct definition so the debugger will 4895 understand it. */ 4896 pass = TRUE; 4897 val = GET_WORD (input_bfd, sym->e_value); 4898 symsec = NULL; 4899 } 4900 else if ((type & N_STAB) != 0) 4901 { 4902 val = GET_WORD (input_bfd, sym->e_value); 4903 symsec = NULL; 4904 } 4905 else 4906 { 4907 /* If we get here with an indirect symbol, it means that 4908 we are outputting it with a real definition. In such 4909 a case we do not want to output the next symbol, 4910 which is the target of the indirection. */ 4911 if ((type & N_TYPE) == N_INDR) 4912 skip_next = TRUE; 4913 4914 symsec = NULL; 4915 4916 /* We need to get the value from the hash table. We use 4917 hresolve so that if we have defined an indirect 4918 symbol we output the final definition. */ 4919 if (h == NULL) 4920 { 4921 switch (type & N_TYPE) 4922 { 4923 case N_SETT: 4924 symsec = obj_textsec (input_bfd); 4925 break; 4926 case N_SETD: 4927 symsec = obj_datasec (input_bfd); 4928 break; 4929 case N_SETB: 4930 symsec = obj_bsssec (input_bfd); 4931 break; 4932 case N_SETA: 4933 symsec = bfd_abs_section_ptr; 4934 break; 4935 default: 4936 val = 0; 4937 break; 4938 } 4939 } 4940 else if (hresolve->root.type == bfd_link_hash_defined 4941 || hresolve->root.type == bfd_link_hash_defweak) 4942 { 4943 asection *input_section; 4944 asection *output_section; 4945 4946 /* This case usually means a common symbol which was 4947 turned into a defined symbol. */ 4948 input_section = hresolve->root.u.def.section; 4949 output_section = input_section->output_section; 4950 BFD_ASSERT (bfd_is_abs_section (output_section) 4951 || output_section->owner == output_bfd); 4952 val = (hresolve->root.u.def.value 4953 + bfd_get_section_vma (output_bfd, output_section) 4954 + input_section->output_offset); 4955 4956 /* Get the correct type based on the section. If 4957 this is a constructed set, force it to be 4958 globally visible. */ 4959 if (type == N_SETT 4960 || type == N_SETD 4961 || type == N_SETB 4962 || type == N_SETA) 4963 type |= N_EXT; 4964 4965 type &=~ N_TYPE; 4966 4967 if (output_section == obj_textsec (output_bfd)) 4968 type |= (hresolve->root.type == bfd_link_hash_defined 4969 ? N_TEXT 4970 : N_WEAKT); 4971 else if (output_section == obj_datasec (output_bfd)) 4972 type |= (hresolve->root.type == bfd_link_hash_defined 4973 ? N_DATA 4974 : N_WEAKD); 4975 else if (output_section == obj_bsssec (output_bfd)) 4976 type |= (hresolve->root.type == bfd_link_hash_defined 4977 ? N_BSS 4978 : N_WEAKB); 4979 else 4980 type |= (hresolve->root.type == bfd_link_hash_defined 4981 ? N_ABS 4982 : N_WEAKA); 4983 } 4984 else if (hresolve->root.type == bfd_link_hash_common) 4985 val = hresolve->root.u.c.size; 4986 else if (hresolve->root.type == bfd_link_hash_undefweak) 4987 { 4988 val = 0; 4989 type = N_WEAKU; 4990 } 4991 else 4992 val = 0; 4993 } 4994 if (symsec != NULL) 4995 val = (symsec->output_section->vma 4996 + symsec->output_offset 4997 + (GET_WORD (input_bfd, sym->e_value) 4998 - symsec->vma)); 4999 5000 /* If this is a global symbol set the written flag, and if 5001 it is a local symbol see if we should discard it. */ 5002 if (h != NULL) 5003 { 5004 h->written = TRUE; 5005 h->indx = obj_aout_external_sym_count (output_bfd); 5006 } 5007 else if ((type & N_TYPE) != N_SETT 5008 && (type & N_TYPE) != N_SETD 5009 && (type & N_TYPE) != N_SETB 5010 && (type & N_TYPE) != N_SETA) 5011 { 5012 switch (discard) 5013 { 5014 case discard_none: 5015 case discard_sec_merge: 5016 break; 5017 case discard_l: 5018 if ((type & N_STAB) == 0 5019 && bfd_is_local_label_name (input_bfd, name)) 5020 skip = TRUE; 5021 break; 5022 case discard_all: 5023 skip = TRUE; 5024 break; 5025 } 5026 if (skip) 5027 { 5028 pass = FALSE; 5029 continue; 5030 } 5031 } 5032 5033 /* An N_BINCL symbol indicates the start of the stabs 5034 entries for a header file. We need to scan ahead to the 5035 next N_EINCL symbol, ignoring nesting, adding up all the 5036 characters in the symbol names, not including the file 5037 numbers in types (the first number after an open 5038 parenthesis). */ 5039 if (type == (int) N_BINCL) 5040 { 5041 struct external_nlist *incl_sym; 5042 int nest; 5043 struct aout_link_includes_entry *incl_entry; 5044 struct aout_link_includes_totals *t; 5045 5046 val = 0; 5047 nest = 0; 5048 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 5049 { 5050 int incl_type; 5051 5052 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5053 if (incl_type == (int) N_EINCL) 5054 { 5055 if (nest == 0) 5056 break; 5057 --nest; 5058 } 5059 else if (incl_type == (int) N_BINCL) 5060 ++nest; 5061 else if (nest == 0) 5062 { 5063 const char *s; 5064 5065 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 5066 for (; *s != '\0'; s++) 5067 { 5068 val += *s; 5069 if (*s == '(') 5070 { 5071 /* Skip the file number. */ 5072 ++s; 5073 while (ISDIGIT (*s)) 5074 ++s; 5075 --s; 5076 } 5077 } 5078 } 5079 } 5080 5081 /* If we have already included a header file with the 5082 same value, then replace this one with an N_EXCL 5083 symbol. */ 5084 copy = (bfd_boolean) (! finfo->info->keep_memory); 5085 incl_entry = aout_link_includes_lookup (&finfo->includes, 5086 name, TRUE, copy); 5087 if (incl_entry == NULL) 5088 return FALSE; 5089 for (t = incl_entry->totals; t != NULL; t = t->next) 5090 if (t->total == val) 5091 break; 5092 if (t == NULL) 5093 { 5094 /* This is the first time we have seen this header 5095 file with this set of stabs strings. */ 5096 t = bfd_hash_allocate (&finfo->includes.root, 5097 sizeof *t); 5098 if (t == NULL) 5099 return FALSE; 5100 t->total = val; 5101 t->next = incl_entry->totals; 5102 incl_entry->totals = t; 5103 } 5104 else 5105 { 5106 int *incl_map; 5107 5108 /* This is a duplicate header file. We must change 5109 it to be an N_EXCL entry, and mark all the 5110 included symbols to prevent outputting them. */ 5111 type = (int) N_EXCL; 5112 5113 nest = 0; 5114 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 5115 incl_sym < sym_end; 5116 incl_sym++, incl_map++) 5117 { 5118 int incl_type; 5119 5120 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5121 if (incl_type == (int) N_EINCL) 5122 { 5123 if (nest == 0) 5124 { 5125 *incl_map = -1; 5126 break; 5127 } 5128 --nest; 5129 } 5130 else if (incl_type == (int) N_BINCL) 5131 ++nest; 5132 else if (nest == 0) 5133 *incl_map = -1; 5134 } 5135 } 5136 } 5137 } 5138 5139 /* Copy this symbol into the list of symbols we are going to 5140 write out. */ 5141 H_PUT_8 (output_bfd, type, outsym->e_type); 5142 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 5143 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 5144 copy = FALSE; 5145 if (! finfo->info->keep_memory) 5146 { 5147 /* name points into a string table which we are going to 5148 free. If there is a hash table entry, use that string. 5149 Otherwise, copy name into memory. */ 5150 if (h != NULL) 5151 name = h->root.root.string; 5152 else 5153 copy = TRUE; 5154 } 5155 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 5156 name, copy); 5157 if (strtab_index == (bfd_size_type) -1) 5158 return FALSE; 5159 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 5160 PUT_WORD (output_bfd, val, outsym->e_value); 5161 *symbol_map = obj_aout_external_sym_count (output_bfd); 5162 ++obj_aout_external_sym_count (output_bfd); 5163 ++outsym; 5164 } 5165 5166 /* Write out the output symbols we have just constructed. */ 5167 if (outsym > finfo->output_syms) 5168 { 5169 bfd_size_type outsym_size; 5170 5171 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) 5172 return FALSE; 5173 outsym_size = outsym - finfo->output_syms; 5174 outsym_size *= EXTERNAL_NLIST_SIZE; 5175 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd) 5176 != outsym_size) 5177 return FALSE; 5178 finfo->symoff += outsym_size; 5179 } 5180 5181 return TRUE; 5182} 5183 5184/* Link an a.out input BFD into the output file. */ 5185 5186static bfd_boolean 5187aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd) 5188{ 5189 bfd_size_type sym_count; 5190 5191 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 5192 5193 /* If this is a dynamic object, it may need special handling. */ 5194 if ((input_bfd->flags & DYNAMIC) != 0 5195 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 5196 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 5197 (finfo->info, input_bfd)); 5198 5199 /* Get the symbols. We probably have them already, unless 5200 finfo->info->keep_memory is FALSE. */ 5201 if (! aout_get_external_symbols (input_bfd)) 5202 return FALSE; 5203 5204 sym_count = obj_aout_external_sym_count (input_bfd); 5205 5206 /* Write out the symbols and get a map of the new indices. The map 5207 is placed into finfo->symbol_map. */ 5208 if (! aout_link_write_symbols (finfo, input_bfd)) 5209 return FALSE; 5210 5211 /* Relocate and write out the sections. These functions use the 5212 symbol map created by aout_link_write_symbols. The linker_mark 5213 field will be set if these sections are to be included in the 5214 link, which will normally be the case. */ 5215 if (obj_textsec (input_bfd)->linker_mark) 5216 { 5217 if (! aout_link_input_section (finfo, input_bfd, 5218 obj_textsec (input_bfd), 5219 &finfo->treloff, 5220 exec_hdr (input_bfd)->a_trsize)) 5221 return FALSE; 5222 } 5223 if (obj_datasec (input_bfd)->linker_mark) 5224 { 5225 if (! aout_link_input_section (finfo, input_bfd, 5226 obj_datasec (input_bfd), 5227 &finfo->dreloff, 5228 exec_hdr (input_bfd)->a_drsize)) 5229 return FALSE; 5230 } 5231 5232 /* If we are not keeping memory, we don't need the symbols any 5233 longer. We still need them if we are keeping memory, because the 5234 strings in the hash table point into them. */ 5235 if (! finfo->info->keep_memory) 5236 { 5237 if (! aout_link_free_symbols (input_bfd)) 5238 return FALSE; 5239 } 5240 5241 return TRUE; 5242} 5243 5244/* Do the final link step. This is called on the output BFD. The 5245 INFO structure should point to a list of BFDs linked through the 5246 link_next field which can be used to find each BFD which takes part 5247 in the output. Also, each section in ABFD should point to a list 5248 of bfd_link_order structures which list all the input sections for 5249 the output section. */ 5250 5251bfd_boolean 5252NAME (aout, final_link) (bfd *abfd, 5253 struct bfd_link_info *info, 5254 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) 5255{ 5256 struct aout_final_link_info aout_info; 5257 bfd_boolean includes_hash_initialized = FALSE; 5258 bfd *sub; 5259 bfd_size_type trsize, drsize; 5260 bfd_size_type max_contents_size; 5261 bfd_size_type max_relocs_size; 5262 bfd_size_type max_sym_count; 5263 bfd_size_type text_size; 5264 file_ptr text_end; 5265 struct bfd_link_order *p; 5266 asection *o; 5267 bfd_boolean have_link_order_relocs; 5268 5269 if (info->shared) 5270 abfd->flags |= DYNAMIC; 5271 5272 aout_info.info = info; 5273 aout_info.output_bfd = abfd; 5274 aout_info.contents = NULL; 5275 aout_info.relocs = NULL; 5276 aout_info.symbol_map = NULL; 5277 aout_info.output_syms = NULL; 5278 5279 if (!bfd_hash_table_init_n (&aout_info.includes.root, 5280 aout_link_includes_newfunc, 5281 sizeof (struct aout_link_includes_entry), 5282 251)) 5283 goto error_return; 5284 includes_hash_initialized = TRUE; 5285 5286 /* Figure out the largest section size. Also, if generating 5287 relocatable output, count the relocs. */ 5288 trsize = 0; 5289 drsize = 0; 5290 max_contents_size = 0; 5291 max_relocs_size = 0; 5292 max_sym_count = 0; 5293 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 5294 { 5295 bfd_size_type sz; 5296 5297 if (info->relocatable) 5298 { 5299 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5300 { 5301 trsize += exec_hdr (sub)->a_trsize; 5302 drsize += exec_hdr (sub)->a_drsize; 5303 } 5304 else 5305 { 5306 /* FIXME: We need to identify the .text and .data sections 5307 and call get_reloc_upper_bound and canonicalize_reloc to 5308 work out the number of relocs needed, and then multiply 5309 by the reloc size. */ 5310 (*_bfd_error_handler) 5311 (_("%s: relocatable link from %s to %s not supported"), 5312 bfd_get_filename (abfd), 5313 sub->xvec->name, abfd->xvec->name); 5314 bfd_set_error (bfd_error_invalid_operation); 5315 goto error_return; 5316 } 5317 } 5318 5319 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5320 { 5321 sz = obj_textsec (sub)->size; 5322 if (sz > max_contents_size) 5323 max_contents_size = sz; 5324 sz = obj_datasec (sub)->size; 5325 if (sz > max_contents_size) 5326 max_contents_size = sz; 5327 5328 sz = exec_hdr (sub)->a_trsize; 5329 if (sz > max_relocs_size) 5330 max_relocs_size = sz; 5331 sz = exec_hdr (sub)->a_drsize; 5332 if (sz > max_relocs_size) 5333 max_relocs_size = sz; 5334 5335 sz = obj_aout_external_sym_count (sub); 5336 if (sz > max_sym_count) 5337 max_sym_count = sz; 5338 } 5339 } 5340 5341 if (info->relocatable) 5342 { 5343 if (obj_textsec (abfd) != NULL) 5344 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 5345 ->map_head.link_order) 5346 * obj_reloc_entry_size (abfd)); 5347 if (obj_datasec (abfd) != NULL) 5348 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 5349 ->map_head.link_order) 5350 * obj_reloc_entry_size (abfd)); 5351 } 5352 5353 exec_hdr (abfd)->a_trsize = trsize; 5354 exec_hdr (abfd)->a_drsize = drsize; 5355 5356 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 5357 5358 /* Adjust the section sizes and vmas according to the magic number. 5359 This sets a_text, a_data and a_bss in the exec_hdr and sets the 5360 filepos for each section. */ 5361 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 5362 goto error_return; 5363 5364 /* The relocation and symbol file positions differ among a.out 5365 targets. We are passed a callback routine from the backend 5366 specific code to handle this. 5367 FIXME: At this point we do not know how much space the symbol 5368 table will require. This will not work for any (nonstandard) 5369 a.out target that needs to know the symbol table size before it 5370 can compute the relocation file positions. This may or may not 5371 be the case for the hp300hpux target, for example. */ 5372 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 5373 &aout_info.symoff); 5374 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 5375 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 5376 obj_sym_filepos (abfd) = aout_info.symoff; 5377 5378 /* We keep a count of the symbols as we output them. */ 5379 obj_aout_external_sym_count (abfd) = 0; 5380 5381 /* We accumulate the string table as we write out the symbols. */ 5382 aout_info.strtab = _bfd_stringtab_init (); 5383 if (aout_info.strtab == NULL) 5384 goto error_return; 5385 5386 /* Allocate buffers to hold section contents and relocs. */ 5387 aout_info.contents = bfd_malloc (max_contents_size); 5388 aout_info.relocs = bfd_malloc (max_relocs_size); 5389 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *)); 5390 aout_info.output_syms = bfd_malloc ((max_sym_count + 1) 5391 * sizeof (struct external_nlist)); 5392 if ((aout_info.contents == NULL && max_contents_size != 0) 5393 || (aout_info.relocs == NULL && max_relocs_size != 0) 5394 || (aout_info.symbol_map == NULL && max_sym_count != 0) 5395 || aout_info.output_syms == NULL) 5396 goto error_return; 5397 5398 /* If we have a symbol named __DYNAMIC, force it out now. This is 5399 required by SunOS. Doing this here rather than in sunos.c is a 5400 hack, but it's easier than exporting everything which would be 5401 needed. */ 5402 { 5403 struct aout_link_hash_entry *h; 5404 5405 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 5406 FALSE, FALSE, FALSE); 5407 if (h != NULL) 5408 aout_link_write_other_symbol (h, &aout_info); 5409 } 5410 5411 /* The most time efficient way to do the link would be to read all 5412 the input object files into memory and then sort out the 5413 information into the output file. Unfortunately, that will 5414 probably use too much memory. Another method would be to step 5415 through everything that composes the text section and write it 5416 out, and then everything that composes the data section and write 5417 it out, and then write out the relocs, and then write out the 5418 symbols. Unfortunately, that requires reading stuff from each 5419 input file several times, and we will not be able to keep all the 5420 input files open simultaneously, and reopening them will be slow. 5421 5422 What we do is basically process one input file at a time. We do 5423 everything we need to do with an input file once--copy over the 5424 section contents, handle the relocation information, and write 5425 out the symbols--and then we throw away the information we read 5426 from it. This approach requires a lot of lseeks of the output 5427 file, which is unfortunate but still faster than reopening a lot 5428 of files. 5429 5430 We use the output_has_begun field of the input BFDs to see 5431 whether we have already handled it. */ 5432 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 5433 sub->output_has_begun = FALSE; 5434 5435 /* Mark all sections which are to be included in the link. This 5436 will normally be every section. We need to do this so that we 5437 can identify any sections which the linker has decided to not 5438 include. */ 5439 for (o = abfd->sections; o != NULL; o = o->next) 5440 { 5441 for (p = o->map_head.link_order; p != NULL; p = p->next) 5442 if (p->type == bfd_indirect_link_order) 5443 p->u.indirect.section->linker_mark = TRUE; 5444 } 5445 5446 have_link_order_relocs = FALSE; 5447 for (o = abfd->sections; o != NULL; o = o->next) 5448 { 5449 for (p = o->map_head.link_order; 5450 p != NULL; 5451 p = p->next) 5452 { 5453 if (p->type == bfd_indirect_link_order 5454 && (bfd_get_flavour (p->u.indirect.section->owner) 5455 == bfd_target_aout_flavour)) 5456 { 5457 bfd *input_bfd; 5458 5459 input_bfd = p->u.indirect.section->owner; 5460 if (! input_bfd->output_has_begun) 5461 { 5462 if (! aout_link_input_bfd (&aout_info, input_bfd)) 5463 goto error_return; 5464 input_bfd->output_has_begun = TRUE; 5465 } 5466 } 5467 else if (p->type == bfd_section_reloc_link_order 5468 || p->type == bfd_symbol_reloc_link_order) 5469 { 5470 /* These are handled below. */ 5471 have_link_order_relocs = TRUE; 5472 } 5473 else 5474 { 5475 if (! _bfd_default_link_order (abfd, info, o, p)) 5476 goto error_return; 5477 } 5478 } 5479 } 5480 5481 /* Write out any symbols that we have not already written out. */ 5482 aout_link_hash_traverse (aout_hash_table (info), 5483 aout_link_write_other_symbol, 5484 (void *) &aout_info); 5485 5486 /* Now handle any relocs we were asked to create by the linker. 5487 These did not come from any input file. We must do these after 5488 we have written out all the symbols, so that we know the symbol 5489 indices to use. */ 5490 if (have_link_order_relocs) 5491 { 5492 for (o = abfd->sections; o != NULL; o = o->next) 5493 { 5494 for (p = o->map_head.link_order; 5495 p != NULL; 5496 p = p->next) 5497 { 5498 if (p->type == bfd_section_reloc_link_order 5499 || p->type == bfd_symbol_reloc_link_order) 5500 { 5501 if (! aout_link_reloc_link_order (&aout_info, o, p)) 5502 goto error_return; 5503 } 5504 } 5505 } 5506 } 5507 5508 if (aout_info.contents != NULL) 5509 { 5510 free (aout_info.contents); 5511 aout_info.contents = NULL; 5512 } 5513 if (aout_info.relocs != NULL) 5514 { 5515 free (aout_info.relocs); 5516 aout_info.relocs = NULL; 5517 } 5518 if (aout_info.symbol_map != NULL) 5519 { 5520 free (aout_info.symbol_map); 5521 aout_info.symbol_map = NULL; 5522 } 5523 if (aout_info.output_syms != NULL) 5524 { 5525 free (aout_info.output_syms); 5526 aout_info.output_syms = NULL; 5527 } 5528 if (includes_hash_initialized) 5529 { 5530 bfd_hash_table_free (&aout_info.includes.root); 5531 includes_hash_initialized = FALSE; 5532 } 5533 5534 /* Finish up any dynamic linking we may be doing. */ 5535 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 5536 { 5537 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 5538 goto error_return; 5539 } 5540 5541 /* Update the header information. */ 5542 abfd->symcount = obj_aout_external_sym_count (abfd); 5543 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 5544 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 5545 obj_textsec (abfd)->reloc_count = 5546 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 5547 obj_datasec (abfd)->reloc_count = 5548 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 5549 5550 /* Write out the string table, unless there are no symbols. */ 5551 if (abfd->symcount > 0) 5552 { 5553 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 5554 || ! emit_stringtab (abfd, aout_info.strtab)) 5555 goto error_return; 5556 } 5557 else if (obj_textsec (abfd)->reloc_count == 0 5558 && obj_datasec (abfd)->reloc_count == 0) 5559 { 5560 bfd_byte b; 5561 file_ptr pos; 5562 5563 b = 0; 5564 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1; 5565 if (bfd_seek (abfd, pos, SEEK_SET) != 0 5566 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) 5567 goto error_return; 5568 } 5569 5570 return TRUE; 5571 5572 error_return: 5573 if (aout_info.contents != NULL) 5574 free (aout_info.contents); 5575 if (aout_info.relocs != NULL) 5576 free (aout_info.relocs); 5577 if (aout_info.symbol_map != NULL) 5578 free (aout_info.symbol_map); 5579 if (aout_info.output_syms != NULL) 5580 free (aout_info.output_syms); 5581 if (includes_hash_initialized) 5582 bfd_hash_table_free (&aout_info.includes.root); 5583 return FALSE; 5584} 5585