aoutx.h revision 1.8
1/* BFD semi-generic back-end for a.out binaries. 2 Copyright (C) 1990-2019 Free Software Foundation, Inc. 3 Written by Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22/* 23SECTION 24 a.out backends 25 26DESCRIPTION 27 28 BFD supports a number of different flavours of a.out format, 29 though the major differences are only the sizes of the 30 structures on disk, and the shape of the relocation 31 information. 32 33 The support is split into a basic support file @file{aoutx.h} 34 and other files which derive functions from the base. One 35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and 36 adds to the basic a.out functions support for sun3, sun4, and 37 386 a.out files, to create a target jump vector for a specific 38 target. 39 40 This information is further split out into more specific files 41 for each machine, including @file{sunos.c} for sun3 and sun4, 42 and @file{demo64.c} for a demonstration of a 64 bit a.out format. 43 44 The base file @file{aoutx.h} defines general mechanisms for 45 reading and writing records to and from disk and various 46 other methods which BFD requires. It is included by 47 @file{aout32.c} and @file{aout64.c} to form the names 48 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. 49 50 As an example, this is what goes on to make the back end for a 51 sun4, from @file{aout32.c}: 52 53| #define ARCH_SIZE 32 54| #include "aoutx.h" 55 56 Which exports names: 57 58| ... 59| aout_32_canonicalize_reloc 60| aout_32_find_nearest_line 61| aout_32_get_lineno 62| aout_32_get_reloc_upper_bound 63| ... 64 65 from @file{sunos.c}: 66 67| #define TARGET_NAME "a.out-sunos-big" 68| #define VECNAME sparc_aout_sunos_be_vec 69| #include "aoutf1.h" 70 71 requires all the names from @file{aout32.c}, and produces the jump vector 72 73| sparc_aout_sunos_be_vec 74 75 The file @file{host-aout.c} is a special case. It is for a large set 76 of hosts that use ``more or less standard'' a.out files, and 77 for which cross-debugging is not interesting. It uses the 78 standard 32-bit a.out support routines, but determines the 79 file offsets and addresses of the text, data, and BSS 80 sections, the machine architecture and machine type, and the 81 entry point address, in a host-dependent manner. Once these 82 values have been determined, generic code is used to handle 83 the object file. 84 85 When porting it to run on a new system, you must supply: 86 87| HOST_PAGE_SIZE 88| HOST_SEGMENT_SIZE 89| HOST_MACHINE_ARCH (optional) 90| HOST_MACHINE_MACHINE (optional) 91| HOST_TEXT_START_ADDR 92| HOST_STACK_END_ADDR 93 94 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These 95 values, plus the structures and macros defined in @file{a.out.h} on 96 your host system, will produce a BFD target that will access 97 ordinary a.out files on your host. To configure a new machine 98 to use @file{host-aout.c}, specify: 99 100| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec 101| TDEPFILES= host-aout.o trad-core.o 102 103 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac} 104 to use the 105 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your 106 configuration is selected. */ 107 108/* Some assumptions: 109 * Any BFD with D_PAGED set is ZMAGIC, and vice versa. 110 Doesn't matter what the setting of WP_TEXT is on output, but it'll 111 get set on input. 112 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. 113 * Any BFD with both flags clear is OMAGIC. 114 (Just want to make these explicit, so the conditions tested in this 115 file make sense if you're more familiar with a.out than with BFD.) */ 116 117#define KEEPIT udata.i 118 119#include "sysdep.h" 120#include <limits.h> 121#include "bfd.h" 122#include "safe-ctype.h" 123#include "bfdlink.h" 124 125#include "libaout.h" 126#include "libbfd.h" 127#include "aout/aout64.h" 128#include "aout/stab_gnu.h" 129#include "aout/ar.h" 130 131/* 132SUBSECTION 133 Relocations 134 135DESCRIPTION 136 The file @file{aoutx.h} provides for both the @emph{standard} 137 and @emph{extended} forms of a.out relocation records. 138 139 The standard records contain only an address, a symbol index, 140 and a type field. The extended records also have a full 141 integer for an addend. */ 142 143#ifndef CTOR_TABLE_RELOC_HOWTO 144#define CTOR_TABLE_RELOC_IDX 2 145#define CTOR_TABLE_RELOC_HOWTO(BFD) \ 146 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \ 147 ? howto_table_ext : howto_table_std) \ 148 + CTOR_TABLE_RELOC_IDX) 149#endif 150 151#ifndef MY_swap_std_reloc_in 152#define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in) 153#endif 154 155#ifndef MY_swap_ext_reloc_in 156#define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in) 157#endif 158 159#ifndef MY_swap_std_reloc_out 160#define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out) 161#endif 162 163#ifndef MY_swap_ext_reloc_out 164#define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out) 165#endif 166 167#ifndef MY_final_link_relocate 168#define MY_final_link_relocate _bfd_final_link_relocate 169#endif 170 171#ifndef MY_relocate_contents 172#define MY_relocate_contents _bfd_relocate_contents 173#endif 174 175#define howto_table_ext NAME (aout, ext_howto_table) 176#define howto_table_std NAME (aout, std_howto_table) 177 178reloc_howto_type howto_table_ext[] = 179{ 180 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 181 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE), 182 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE), 183 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE), 184 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE), 185 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE), 186 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE), 187 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE), 188 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE), 189 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE), 190 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE), 191 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE), 192 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE), 193 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE), 194 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE), 195 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE), 196 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE), 197 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE), 198 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE), 199 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE), 200 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE), 201 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE), 202 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE), 203 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE), 204 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE), 205 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 206 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 207#define RELOC_SPARC_REV32 RELOC_WDISP19 208 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE), 209}; 210 211/* Convert standard reloc records to "arelent" format (incl byte swap). */ 212 213reloc_howto_type howto_table_std[] = 214{ 215 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 216HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), 217HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 218HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), 219HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE), 220HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), 221HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 222HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), 223HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE), 224HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE), 225HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE), 226HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE), 227EMPTY_HOWTO (-1), 228EMPTY_HOWTO (-1), 229EMPTY_HOWTO (-1), 230EMPTY_HOWTO (-1), 231EMPTY_HOWTO (-1), 232 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE), 233EMPTY_HOWTO (-1), 234EMPTY_HOWTO (-1), 235EMPTY_HOWTO (-1), 236EMPTY_HOWTO (-1), 237EMPTY_HOWTO (-1), 238EMPTY_HOWTO (-1), 239EMPTY_HOWTO (-1), 240EMPTY_HOWTO (-1), 241EMPTY_HOWTO (-1), 242EMPTY_HOWTO (-1), 243EMPTY_HOWTO (-1), 244EMPTY_HOWTO (-1), 245EMPTY_HOWTO (-1), 246EMPTY_HOWTO (-1), 247EMPTY_HOWTO (-1), 248 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE), 249EMPTY_HOWTO (-1), 250EMPTY_HOWTO (-1), 251EMPTY_HOWTO (-1), 252EMPTY_HOWTO (-1), 253EMPTY_HOWTO (-1), 254EMPTY_HOWTO (-1), 255EMPTY_HOWTO (-1), 256 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE), 257}; 258 259#define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0])) 260 261reloc_howto_type * 262NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) 263{ 264#define EXT(i, j) case i: return & howto_table_ext [j] 265#define STD(i, j) case i: return & howto_table_std [j] 266 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 267 268 if (code == BFD_RELOC_CTOR) 269 switch (bfd_arch_bits_per_address (abfd)) 270 { 271 case 32: 272 code = BFD_RELOC_32; 273 break; 274 case 64: 275 code = BFD_RELOC_64; 276 break; 277 } 278 279 if (ext) 280 switch (code) 281 { 282 EXT (BFD_RELOC_8, 0); 283 EXT (BFD_RELOC_16, 1); 284 EXT (BFD_RELOC_32, 2); 285 EXT (BFD_RELOC_HI22, 8); 286 EXT (BFD_RELOC_LO10, 11); 287 EXT (BFD_RELOC_32_PCREL_S2, 6); 288 EXT (BFD_RELOC_SPARC_WDISP22, 7); 289 EXT (BFD_RELOC_SPARC13, 10); 290 EXT (BFD_RELOC_SPARC_GOT10, 14); 291 EXT (BFD_RELOC_SPARC_BASE13, 15); 292 EXT (BFD_RELOC_SPARC_GOT13, 15); 293 EXT (BFD_RELOC_SPARC_GOT22, 16); 294 EXT (BFD_RELOC_SPARC_PC10, 17); 295 EXT (BFD_RELOC_SPARC_PC22, 18); 296 EXT (BFD_RELOC_SPARC_WPLT30, 19); 297 EXT (BFD_RELOC_SPARC_REV32, 26); 298 default: 299 return NULL; 300 } 301 else 302 /* std relocs. */ 303 switch (code) 304 { 305 STD (BFD_RELOC_8, 0); 306 STD (BFD_RELOC_16, 1); 307 STD (BFD_RELOC_32, 2); 308 STD (BFD_RELOC_8_PCREL, 4); 309 STD (BFD_RELOC_16_PCREL, 5); 310 STD (BFD_RELOC_32_PCREL, 6); 311 STD (BFD_RELOC_16_BASEREL, 9); 312 STD (BFD_RELOC_32_BASEREL, 10); 313 default: 314 return NULL; 315 } 316} 317 318reloc_howto_type * 319NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name) 320{ 321 unsigned int i, size; 322 reloc_howto_type *howto_table; 323 324 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE) 325 { 326 howto_table = howto_table_ext; 327 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]); 328 } 329 else 330 { 331 howto_table = howto_table_std; 332 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]); 333 } 334 335 for (i = 0; i < size; i++) 336 if (howto_table[i].name != NULL 337 && strcasecmp (howto_table[i].name, r_name) == 0) 338 return &howto_table[i]; 339 340 return NULL; 341} 342 343/* 344SUBSECTION 345 Internal entry points 346 347DESCRIPTION 348 @file{aoutx.h} exports several routines for accessing the 349 contents of an a.out file, which are gathered and exported in 350 turn by various format specific files (eg sunos.c). 351*/ 352 353/* 354FUNCTION 355 aout_@var{size}_swap_exec_header_in 356 357SYNOPSIS 358 void aout_@var{size}_swap_exec_header_in, 359 (bfd *abfd, 360 struct external_exec *bytes, 361 struct internal_exec *execp); 362 363DESCRIPTION 364 Swap the information in an executable header @var{raw_bytes} taken 365 from a raw byte stream memory image into the internal exec header 366 structure @var{execp}. 367*/ 368 369#ifndef NAME_swap_exec_header_in 370void 371NAME (aout, swap_exec_header_in) (bfd *abfd, 372 struct external_exec *bytes, 373 struct internal_exec *execp) 374{ 375 /* The internal_exec structure has some fields that are unused in this 376 configuration (IE for i960), so ensure that all such uninitialized 377 fields are zero'd out. There are places where two of these structs 378 are memcmp'd, and thus the contents do matter. */ 379 memset ((void *) execp, 0, sizeof (struct internal_exec)); 380 /* Now fill in fields in the execp, from the bytes in the raw data. */ 381 execp->a_info = H_GET_32 (abfd, bytes->e_info); 382 execp->a_text = GET_WORD (abfd, bytes->e_text); 383 execp->a_data = GET_WORD (abfd, bytes->e_data); 384 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 385 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 386 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 387 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 388 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 389} 390#define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) 391#endif 392 393/* 394FUNCTION 395 aout_@var{size}_swap_exec_header_out 396 397SYNOPSIS 398 void aout_@var{size}_swap_exec_header_out 399 (bfd *abfd, 400 struct internal_exec *execp, 401 struct external_exec *raw_bytes); 402 403DESCRIPTION 404 Swap the information in an internal exec header structure 405 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 406*/ 407void 408NAME (aout, swap_exec_header_out) (bfd *abfd, 409 struct internal_exec *execp, 410 struct external_exec *bytes) 411{ 412 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 413 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 414 PUT_WORD (abfd, execp->a_text , bytes->e_text); 415 PUT_WORD (abfd, execp->a_data , bytes->e_data); 416 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 417 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 418 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 419 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 420 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 421} 422 423/* Make all the section for an a.out file. */ 424 425bfd_boolean 426NAME (aout, make_sections) (bfd *abfd) 427{ 428 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) 429 return FALSE; 430 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) 431 return FALSE; 432 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) 433 return FALSE; 434 return TRUE; 435} 436 437/* 438FUNCTION 439 aout_@var{size}_some_aout_object_p 440 441SYNOPSIS 442 const bfd_target *aout_@var{size}_some_aout_object_p 443 (bfd *abfd, 444 struct internal_exec *execp, 445 const bfd_target *(*callback_to_real_object_p) (bfd *)); 446 447DESCRIPTION 448 Some a.out variant thinks that the file open in @var{abfd} 449 checking is an a.out file. Do some more checking, and set up 450 for access if it really is. Call back to the calling 451 environment's "finish up" function just before returning, to 452 handle any last-minute setup. 453*/ 454 455const bfd_target * 456NAME (aout, some_aout_object_p) (bfd *abfd, 457 struct internal_exec *execp, 458 const bfd_target *(*callback_to_real_object_p) (bfd *)) 459{ 460 struct aout_data_struct *rawptr, *oldrawptr; 461 const bfd_target *result; 462 bfd_size_type amt = sizeof (* rawptr); 463 464 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 465 if (rawptr == NULL) 466 return NULL; 467 468 oldrawptr = abfd->tdata.aout_data; 469 abfd->tdata.aout_data = rawptr; 470 471 /* Copy the contents of the old tdata struct. */ 472 if (oldrawptr != NULL) 473 *abfd->tdata.aout_data = *oldrawptr; 474 475 abfd->tdata.aout_data->a.hdr = &rawptr->e; 476 /* Copy in the internal_exec struct. */ 477 *(abfd->tdata.aout_data->a.hdr) = *execp; 478 execp = abfd->tdata.aout_data->a.hdr; 479 480 /* Set the file flags. */ 481 abfd->flags = BFD_NO_FLAGS; 482 if (execp->a_drsize || execp->a_trsize) 483 abfd->flags |= HAS_RELOC; 484 /* Setting of EXEC_P has been deferred to the bottom of this function. */ 485 if (execp->a_syms) 486 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 487 if (N_DYNAMIC (execp)) 488 abfd->flags |= DYNAMIC; 489 490 if (N_MAGIC (execp) == ZMAGIC) 491 { 492 abfd->flags |= D_PAGED | WP_TEXT; 493 adata (abfd).magic = z_magic; 494 } 495 else if (N_MAGIC (execp) == QMAGIC) 496 { 497 abfd->flags |= D_PAGED | WP_TEXT; 498 adata (abfd).magic = z_magic; 499 adata (abfd).subformat = q_magic_format; 500 } 501 else if (N_MAGIC (execp) == NMAGIC) 502 { 503 abfd->flags |= WP_TEXT; 504 adata (abfd).magic = n_magic; 505 } 506 else if (N_MAGIC (execp) == OMAGIC 507 || N_MAGIC (execp) == BMAGIC) 508 adata (abfd).magic = o_magic; 509 else 510 /* Should have been checked with N_BADMAG before this routine 511 was called. */ 512 abort (); 513 514 bfd_get_start_address (abfd) = execp->a_entry; 515 516 obj_aout_symbols (abfd) = NULL; 517 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 518 519 /* The default relocation entry size is that of traditional V7 Unix. */ 520 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 521 522 /* The default symbol entry size is that of traditional Unix. */ 523 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 524 525#ifdef USE_MMAP 526 bfd_init_window (&obj_aout_sym_window (abfd)); 527 bfd_init_window (&obj_aout_string_window (abfd)); 528#endif 529 obj_aout_external_syms (abfd) = NULL; 530 obj_aout_external_strings (abfd) = NULL; 531 obj_aout_sym_hashes (abfd) = NULL; 532 533 if (! NAME (aout, make_sections) (abfd)) 534 goto error_ret; 535 536 obj_datasec (abfd)->size = execp->a_data; 537 obj_bsssec (abfd)->size = execp->a_bss; 538 539 obj_textsec (abfd)->flags = 540 (execp->a_trsize != 0 541 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 542 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 543 obj_datasec (abfd)->flags = 544 (execp->a_drsize != 0 545 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 546 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 547 obj_bsssec (abfd)->flags = SEC_ALLOC; 548 549#ifdef THIS_IS_ONLY_DOCUMENTATION 550 /* The common code can't fill in these things because they depend 551 on either the start address of the text segment, the rounding 552 up of virtual addresses between segments, or the starting file 553 position of the text segment -- all of which varies among different 554 versions of a.out. */ 555 556 /* Call back to the format-dependent code to fill in the rest of the 557 fields and do any further cleanup. Things that should be filled 558 in by the callback: */ 559 560 struct exec *execp = exec_hdr (abfd); 561 562 obj_textsec (abfd)->size = N_TXTSIZE (execp); 563 /* Data and bss are already filled in since they're so standard. */ 564 565 /* The virtual memory addresses of the sections. */ 566 obj_textsec (abfd)->vma = N_TXTADDR (execp); 567 obj_datasec (abfd)->vma = N_DATADDR (execp); 568 obj_bsssec (abfd)->vma = N_BSSADDR (execp); 569 570 /* The file offsets of the sections. */ 571 obj_textsec (abfd)->filepos = N_TXTOFF (execp); 572 obj_datasec (abfd)->filepos = N_DATOFF (execp); 573 574 /* The file offsets of the relocation info. */ 575 obj_textsec (abfd)->rel_filepos = N_TRELOFF (execp); 576 obj_datasec (abfd)->rel_filepos = N_DRELOFF (execp); 577 578 /* The file offsets of the string table and symbol table. */ 579 obj_str_filepos (abfd) = N_STROFF (execp); 580 obj_sym_filepos (abfd) = N_SYMOFF (execp); 581 582 /* Determine the architecture and machine type of the object file. */ 583 switch (N_MACHTYPE (exec_hdr (abfd))) 584 { 585 default: 586 abfd->obj_arch = bfd_arch_obscure; 587 break; 588 } 589 590 adata (abfd)->page_size = TARGET_PAGE_SIZE; 591 adata (abfd)->segment_size = SEGMENT_SIZE; 592 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 593 594 return abfd->xvec; 595 596 /* The architecture is encoded in various ways in various a.out variants, 597 or is not encoded at all in some of them. The relocation size depends 598 on the architecture and the a.out variant. Finally, the return value 599 is the bfd_target vector in use. If an error occurs, return zero and 600 set bfd_error to the appropriate error code. 601 602 Formats such as b.out, which have additional fields in the a.out 603 header, should cope with them in this callback as well. */ 604#endif /* DOCUMENTATION */ 605 606 result = (*callback_to_real_object_p) (abfd); 607 608 /* Now that the segment addresses have been worked out, take a better 609 guess at whether the file is executable. If the entry point 610 is within the text segment, assume it is. (This makes files 611 executable even if their entry point address is 0, as long as 612 their text starts at zero.). 613 614 This test had to be changed to deal with systems where the text segment 615 runs at a different location than the default. The problem is that the 616 entry address can appear to be outside the text segment, thus causing an 617 erroneous conclusion that the file isn't executable. 618 619 To fix this, we now accept any non-zero entry point as an indication of 620 executability. This will work most of the time, since only the linker 621 sets the entry point, and that is likely to be non-zero for most systems. */ 622 623 if (execp->a_entry != 0 624 || (execp->a_entry >= obj_textsec (abfd)->vma 625 && execp->a_entry < (obj_textsec (abfd)->vma 626 + obj_textsec (abfd)->size) 627 && execp->a_trsize == 0 628 && execp->a_drsize == 0)) 629 abfd->flags |= EXEC_P; 630#ifdef STAT_FOR_EXEC 631 else 632 { 633 struct stat stat_buf; 634 635 /* The original heuristic doesn't work in some important cases. 636 The a.out file has no information about the text start 637 address. For files (like kernels) linked to non-standard 638 addresses (ld -Ttext nnn) the entry point may not be between 639 the default text start (obj_textsec(abfd)->vma) and 640 (obj_textsec(abfd)->vma) + text size. This is not just a mach 641 issue. Many kernels are loaded at non standard addresses. */ 642 if (abfd->iostream != NULL 643 && (abfd->flags & BFD_IN_MEMORY) == 0 644 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0) 645 && ((stat_buf.st_mode & 0111) != 0)) 646 abfd->flags |= EXEC_P; 647 } 648#endif /* STAT_FOR_EXEC */ 649 650 if (result) 651 return result; 652 653 error_ret: 654 bfd_release (abfd, rawptr); 655 abfd->tdata.aout_data = oldrawptr; 656 return NULL; 657} 658 659/* 660FUNCTION 661 aout_@var{size}_mkobject 662 663SYNOPSIS 664 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd); 665 666DESCRIPTION 667 Initialize BFD @var{abfd} for use with a.out files. 668*/ 669 670bfd_boolean 671NAME (aout, mkobject) (bfd *abfd) 672{ 673 struct aout_data_struct *rawptr; 674 bfd_size_type amt = sizeof (* rawptr); 675 676 bfd_set_error (bfd_error_system_call); 677 678 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 679 if (rawptr == NULL) 680 return FALSE; 681 682 abfd->tdata.aout_data = rawptr; 683 exec_hdr (abfd) = &(rawptr->e); 684 685 obj_textsec (abfd) = NULL; 686 obj_datasec (abfd) = NULL; 687 obj_bsssec (abfd) = NULL; 688 689 return TRUE; 690} 691 692/* 693FUNCTION 694 aout_@var{size}_machine_type 695 696SYNOPSIS 697 enum machine_type aout_@var{size}_machine_type 698 (enum bfd_architecture arch, 699 unsigned long machine, 700 bfd_boolean *unknown); 701 702DESCRIPTION 703 Keep track of machine architecture and machine type for 704 a.out's. Return the <<machine_type>> for a particular 705 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 706 and machine can't be represented in a.out format. 707 708 If the architecture is understood, machine type 0 (default) 709 is always understood. 710*/ 711 712enum machine_type 713NAME (aout, machine_type) (enum bfd_architecture arch, 714 unsigned long machine, 715 bfd_boolean *unknown) 716{ 717 enum machine_type arch_flags; 718 719 arch_flags = M_UNKNOWN; 720 *unknown = TRUE; 721 722 switch (arch) 723 { 724 case bfd_arch_sparc: 725 if (machine == 0 726 || machine == bfd_mach_sparc 727 || machine == bfd_mach_sparc_sparclite 728 || machine == bfd_mach_sparc_sparclite_le 729 || machine == bfd_mach_sparc_v8plus 730 || machine == bfd_mach_sparc_v8plusa 731 || machine == bfd_mach_sparc_v8plusb 732 || machine == bfd_mach_sparc_v8plusc 733 || machine == bfd_mach_sparc_v8plusd 734 || machine == bfd_mach_sparc_v8pluse 735 || machine == bfd_mach_sparc_v8plusv 736 || machine == bfd_mach_sparc_v8plusm 737 || machine == bfd_mach_sparc_v8plusm8 738 || machine == bfd_mach_sparc_v9 739 || machine == bfd_mach_sparc_v9a 740 || machine == bfd_mach_sparc_v9b 741 || machine == bfd_mach_sparc_v9c 742 || machine == bfd_mach_sparc_v9d 743 || machine == bfd_mach_sparc_v9e 744 || machine == bfd_mach_sparc_v9v 745 || machine == bfd_mach_sparc_v9m 746 || machine == bfd_mach_sparc_v9m8) 747 arch_flags = M_SPARC; 748 else if (machine == bfd_mach_sparc_sparclet) 749 arch_flags = M_SPARCLET; 750 break; 751 752 case bfd_arch_i386: 753 if (machine == 0 754 || machine == bfd_mach_i386_i386 755 || machine == bfd_mach_i386_i386_intel_syntax) 756 arch_flags = M_386; 757 break; 758 759 case bfd_arch_arm: 760 if (machine == 0) 761 arch_flags = M_ARM; 762 break; 763 764 case bfd_arch_mips: 765 switch (machine) 766 { 767 case 0: 768 case bfd_mach_mips3000: 769 case bfd_mach_mips3900: 770 arch_flags = M_MIPS1; 771 break; 772 case bfd_mach_mips6000: 773 arch_flags = M_MIPS2; 774 break; 775 case bfd_mach_mips4000: 776 case bfd_mach_mips4010: 777 case bfd_mach_mips4100: 778 case bfd_mach_mips4300: 779 case bfd_mach_mips4400: 780 case bfd_mach_mips4600: 781 case bfd_mach_mips4650: 782 case bfd_mach_mips8000: 783 case bfd_mach_mips9000: 784 case bfd_mach_mips10000: 785 case bfd_mach_mips12000: 786 case bfd_mach_mips14000: 787 case bfd_mach_mips16000: 788 case bfd_mach_mips16: 789 case bfd_mach_mipsisa32: 790 case bfd_mach_mipsisa32r2: 791 case bfd_mach_mipsisa32r3: 792 case bfd_mach_mipsisa32r5: 793 case bfd_mach_mipsisa32r6: 794 case bfd_mach_mips5: 795 case bfd_mach_mipsisa64: 796 case bfd_mach_mipsisa64r2: 797 case bfd_mach_mipsisa64r3: 798 case bfd_mach_mipsisa64r5: 799 case bfd_mach_mipsisa64r6: 800 case bfd_mach_mips_sb1: 801 case bfd_mach_mips_xlr: 802 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 803 arch_flags = M_MIPS2; 804 break; 805 default: 806 arch_flags = M_UNKNOWN; 807 break; 808 } 809 break; 810 811 case bfd_arch_ns32k: 812 switch (machine) 813 { 814 case 0: arch_flags = M_NS32532; break; 815 case 32032: arch_flags = M_NS32032; break; 816 case 32532: arch_flags = M_NS32532; break; 817 default: arch_flags = M_UNKNOWN; break; 818 } 819 break; 820 821 case bfd_arch_vax: 822 *unknown = FALSE; 823 break; 824 825 case bfd_arch_cris: 826 if (machine == 0 || machine == 255) 827 arch_flags = M_CRIS; 828 break; 829 830 default: 831 arch_flags = M_UNKNOWN; 832 } 833 834 if (arch_flags != M_UNKNOWN) 835 *unknown = FALSE; 836 837 return arch_flags; 838} 839 840/* 841FUNCTION 842 aout_@var{size}_set_arch_mach 843 844SYNOPSIS 845 bfd_boolean aout_@var{size}_set_arch_mach, 846 (bfd *, 847 enum bfd_architecture arch, 848 unsigned long machine); 849 850DESCRIPTION 851 Set the architecture and the machine of the BFD @var{abfd} to the 852 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 853 can support the architecture required. 854*/ 855 856bfd_boolean 857NAME (aout, set_arch_mach) (bfd *abfd, 858 enum bfd_architecture arch, 859 unsigned long machine) 860{ 861 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 862 return FALSE; 863 864 if (arch != bfd_arch_unknown) 865 { 866 bfd_boolean unknown; 867 868 NAME (aout, machine_type) (arch, machine, &unknown); 869 if (unknown) 870 return FALSE; 871 } 872 873 /* Determine the size of a relocation entry. */ 874 switch (arch) 875 { 876 case bfd_arch_sparc: 877 case bfd_arch_mips: 878 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 879 break; 880 default: 881 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 882 break; 883 } 884 885 return (*aout_backend_info (abfd)->set_sizes) (abfd); 886} 887 888static void 889adjust_o_magic (bfd *abfd, struct internal_exec *execp) 890{ 891 file_ptr pos = adata (abfd).exec_bytes_size; 892 bfd_vma vma = 0; 893 int pad = 0; 894 895 /* Text. */ 896 obj_textsec (abfd)->filepos = pos; 897 if (!obj_textsec (abfd)->user_set_vma) 898 obj_textsec (abfd)->vma = vma; 899 else 900 vma = obj_textsec (abfd)->vma; 901 902 pos += obj_textsec (abfd)->size; 903 vma += obj_textsec (abfd)->size; 904 905 /* Data. */ 906 if (!obj_datasec (abfd)->user_set_vma) 907 { 908 obj_textsec (abfd)->size += pad; 909 pos += pad; 910 vma += pad; 911 obj_datasec (abfd)->vma = vma; 912 } 913 else 914 vma = obj_datasec (abfd)->vma; 915 obj_datasec (abfd)->filepos = pos; 916 pos += obj_datasec (abfd)->size; 917 vma += obj_datasec (abfd)->size; 918 919 /* BSS. */ 920 if (!obj_bsssec (abfd)->user_set_vma) 921 { 922 obj_datasec (abfd)->size += pad; 923 pos += pad; 924 vma += pad; 925 obj_bsssec (abfd)->vma = vma; 926 } 927 else 928 { 929 /* The VMA of the .bss section is set by the VMA of the 930 .data section plus the size of the .data section. We may 931 need to add padding bytes to make this true. */ 932 pad = obj_bsssec (abfd)->vma - vma; 933 if (pad > 0) 934 { 935 obj_datasec (abfd)->size += pad; 936 pos += pad; 937 } 938 } 939 obj_bsssec (abfd)->filepos = pos; 940 941 /* Fix up the exec header. */ 942 execp->a_text = obj_textsec (abfd)->size; 943 execp->a_data = obj_datasec (abfd)->size; 944 execp->a_bss = obj_bsssec (abfd)->size; 945 N_SET_MAGIC (execp, OMAGIC); 946} 947 948static void 949adjust_z_magic (bfd *abfd, struct internal_exec *execp) 950{ 951 bfd_size_type data_pad, text_pad; 952 file_ptr text_end; 953 const struct aout_backend_data *abdp; 954 /* TRUE if text includes exec header. */ 955 bfd_boolean ztih; 956 957 abdp = aout_backend_info (abfd); 958 959 /* Text. */ 960 ztih = (abdp != NULL 961 && (abdp->text_includes_header 962 || obj_aout_subformat (abfd) == q_magic_format)); 963 obj_textsec (abfd)->filepos = (ztih 964 ? adata (abfd).exec_bytes_size 965 : adata (abfd).zmagic_disk_block_size); 966 if (! obj_textsec (abfd)->user_set_vma) 967 { 968 /* ?? Do we really need to check for relocs here? */ 969 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 970 ? 0 971 : (ztih 972 ? (abdp->default_text_vma 973 + adata (abfd).exec_bytes_size) 974 : abdp->default_text_vma)); 975 text_pad = 0; 976 } 977 else 978 { 979 /* The .text section is being loaded at an unusual address. We 980 may need to pad it such that the .data section starts at a page 981 boundary. */ 982 if (ztih) 983 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 984 & (adata (abfd).page_size - 1)); 985 else 986 text_pad = ((- obj_textsec (abfd)->vma) 987 & (adata (abfd).page_size - 1)); 988 } 989 990 /* Find start of data. */ 991 if (ztih) 992 { 993 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; 994 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 995 } 996 else 997 { 998 /* Note that if page_size == zmagic_disk_block_size, then 999 filepos == page_size, and this case is the same as the ztih 1000 case. */ 1001 text_end = obj_textsec (abfd)->size; 1002 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1003 text_end += obj_textsec (abfd)->filepos; 1004 } 1005 obj_textsec (abfd)->size += text_pad; 1006 text_end += text_pad; 1007 1008 /* Data. */ 1009 if (!obj_datasec (abfd)->user_set_vma) 1010 { 1011 bfd_vma vma; 1012 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size; 1013 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1014 } 1015 if (abdp && abdp->zmagic_mapped_contiguous) 1016 { 1017 asection * text = obj_textsec (abfd); 1018 asection * data = obj_datasec (abfd); 1019 1020 text_pad = data->vma - (text->vma + text->size); 1021 /* Only pad the text section if the data 1022 section is going to be placed after it. */ 1023 if (text_pad > 0) 1024 text->size += text_pad; 1025 } 1026 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1027 + obj_textsec (abfd)->size); 1028 1029 /* Fix up exec header while we're at it. */ 1030 execp->a_text = obj_textsec (abfd)->size; 1031 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1032 execp->a_text += adata (abfd).exec_bytes_size; 1033 if (obj_aout_subformat (abfd) == q_magic_format) 1034 N_SET_MAGIC (execp, QMAGIC); 1035 else 1036 N_SET_MAGIC (execp, ZMAGIC); 1037 1038 /* Spec says data section should be rounded up to page boundary. */ 1039 obj_datasec (abfd)->size 1040 = align_power (obj_datasec (abfd)->size, 1041 obj_bsssec (abfd)->alignment_power); 1042 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size, 1043 adata (abfd).page_size); 1044 data_pad = execp->a_data - obj_datasec (abfd)->size; 1045 1046 /* BSS. */ 1047 if (!obj_bsssec (abfd)->user_set_vma) 1048 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1049 + obj_datasec (abfd)->size); 1050 /* If the BSS immediately follows the data section and extra space 1051 in the page is left after the data section, fudge data 1052 in the header so that the bss section looks smaller by that 1053 amount. We'll start the bss section there, and lie to the OS. 1054 (Note that a linker script, as well as the above assignment, 1055 could have explicitly set the BSS vma to immediately follow 1056 the data section.) */ 1057 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1058 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size) 1059 execp->a_bss = (data_pad > obj_bsssec (abfd)->size 1060 ? 0 : obj_bsssec (abfd)->size - data_pad); 1061 else 1062 execp->a_bss = obj_bsssec (abfd)->size; 1063} 1064 1065static void 1066adjust_n_magic (bfd *abfd, struct internal_exec *execp) 1067{ 1068 file_ptr pos = adata (abfd).exec_bytes_size; 1069 bfd_vma vma = 0; 1070 int pad; 1071 1072 /* Text. */ 1073 obj_textsec (abfd)->filepos = pos; 1074 if (!obj_textsec (abfd)->user_set_vma) 1075 obj_textsec (abfd)->vma = vma; 1076 else 1077 vma = obj_textsec (abfd)->vma; 1078 pos += obj_textsec (abfd)->size; 1079 vma += obj_textsec (abfd)->size; 1080 1081 /* Data. */ 1082 obj_datasec (abfd)->filepos = pos; 1083 if (!obj_datasec (abfd)->user_set_vma) 1084 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1085 vma = obj_datasec (abfd)->vma; 1086 1087 /* Since BSS follows data immediately, see if it needs alignment. */ 1088 vma += obj_datasec (abfd)->size; 1089 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1090 obj_datasec (abfd)->size += pad; 1091 pos += obj_datasec (abfd)->size; 1092 1093 /* BSS. */ 1094 if (!obj_bsssec (abfd)->user_set_vma) 1095 obj_bsssec (abfd)->vma = vma; 1096 else 1097 vma = obj_bsssec (abfd)->vma; 1098 1099 /* Fix up exec header. */ 1100 execp->a_text = obj_textsec (abfd)->size; 1101 execp->a_data = obj_datasec (abfd)->size; 1102 execp->a_bss = obj_bsssec (abfd)->size; 1103 N_SET_MAGIC (execp, NMAGIC); 1104} 1105 1106bfd_boolean 1107NAME (aout, adjust_sizes_and_vmas) (bfd *abfd) 1108{ 1109 struct internal_exec *execp = exec_hdr (abfd); 1110 1111 if (! NAME (aout, make_sections) (abfd)) 1112 return FALSE; 1113 1114 if (adata (abfd).magic != undecided_magic) 1115 return TRUE; 1116 1117 obj_textsec (abfd)->size = 1118 align_power (obj_textsec (abfd)->size, 1119 obj_textsec (abfd)->alignment_power); 1120 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 if (! abfd->output_has_begun) 1244 { 1245 if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) 1246 return FALSE; 1247 } 1248 1249 if (section == obj_bsssec (abfd)) 1250 { 1251 bfd_set_error (bfd_error_no_contents); 1252 return FALSE; 1253 } 1254 1255 if (section != obj_textsec (abfd) 1256 && section != obj_datasec (abfd)) 1257 { 1258 if (aout_section_merge_with_text_p (abfd, section)) 1259 section->filepos = obj_textsec (abfd)->filepos + 1260 (section->vma - obj_textsec (abfd)->vma); 1261 else 1262 { 1263 _bfd_error_handler 1264 /* xgettext:c-format */ 1265 (_("%pB: can not represent section `%pA' in a.out object file format"), 1266 abfd, section); 1267 bfd_set_error (bfd_error_nonrepresentable_section); 1268 return FALSE; 1269 } 1270 } 1271 1272 if (count != 0) 1273 { 1274 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1275 || bfd_bwrite (location, count, abfd) != count) 1276 return FALSE; 1277 } 1278 1279 return TRUE; 1280} 1281 1282/* Read the external symbols from an a.out file. */ 1283 1284static bfd_boolean 1285aout_get_external_symbols (bfd *abfd) 1286{ 1287 if (obj_aout_external_syms (abfd) == NULL) 1288 { 1289 bfd_size_type count; 1290 struct external_nlist *syms; 1291 bfd_size_type amt = exec_hdr (abfd)->a_syms; 1292 1293 count = amt / EXTERNAL_NLIST_SIZE; 1294 if (count == 0) 1295 return TRUE; /* Nothing to do. */ 1296 1297#ifdef USE_MMAP 1298 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), amt, 1299 &obj_aout_sym_window (abfd), TRUE)) 1300 return FALSE; 1301 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1302#else 1303 /* We allocate using malloc to make the values easy to free 1304 later on. If we put them on the objalloc it might not be 1305 possible to free them. */ 1306 syms = (struct external_nlist *) bfd_malloc (amt); 1307 if (syms == NULL) 1308 return FALSE; 1309 1310 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1311 || bfd_bread (syms, amt, abfd) != amt) 1312 { 1313 free (syms); 1314 return FALSE; 1315 } 1316#endif 1317 1318 obj_aout_external_syms (abfd) = syms; 1319 obj_aout_external_sym_count (abfd) = count; 1320 } 1321 1322 if (obj_aout_external_strings (abfd) == NULL 1323 && exec_hdr (abfd)->a_syms != 0) 1324 { 1325 unsigned char string_chars[BYTES_IN_WORD]; 1326 bfd_size_type stringsize; 1327 char *strings; 1328 bfd_size_type amt = BYTES_IN_WORD; 1329 1330 /* Get the size of the strings. */ 1331 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1332 || bfd_bread ((void *) string_chars, amt, abfd) != amt) 1333 return FALSE; 1334 stringsize = GET_WORD (abfd, string_chars); 1335 if (stringsize == 0) 1336 stringsize = 1; 1337 else if (stringsize < BYTES_IN_WORD 1338 || (size_t) stringsize != stringsize) 1339 { 1340 bfd_set_error (bfd_error_bad_value); 1341 return FALSE; 1342 } 1343 1344#ifdef USE_MMAP 1345 if (stringsize >= BYTES_IN_WORD) 1346 { 1347 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize + 1, 1348 &obj_aout_string_window (abfd), TRUE)) 1349 return FALSE; 1350 strings = (char *) obj_aout_string_window (abfd).data; 1351 } 1352 else 1353#endif 1354 { 1355 strings = (char *) bfd_malloc (stringsize + 1); 1356 if (strings == NULL) 1357 return FALSE; 1358 1359 if (stringsize >= BYTES_IN_WORD) 1360 { 1361 /* Keep the string count in the buffer for convenience 1362 when indexing with e_strx. */ 1363 amt = stringsize - BYTES_IN_WORD; 1364 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1365 { 1366 free (strings); 1367 return FALSE; 1368 } 1369 } 1370 } 1371 /* Ensure that a zero index yields an empty string. */ 1372 strings[0] = '\0'; 1373 1374 /* Ensure that the string buffer is NUL terminated. */ 1375 strings[stringsize] = 0; 1376 1377 obj_aout_external_strings (abfd) = strings; 1378 obj_aout_external_string_size (abfd) = stringsize; 1379 } 1380 1381 return TRUE; 1382} 1383 1384/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1385 and symbol->value fields of CACHE_PTR will be set from the a.out 1386 nlist structure. This function is responsible for setting 1387 symbol->flags and symbol->section, and adjusting symbol->value. */ 1388 1389static bfd_boolean 1390translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr) 1391{ 1392 flagword visible; 1393 1394 if ((cache_ptr->type & N_STAB) != 0 1395 || cache_ptr->type == N_FN) 1396 { 1397 asection *sec; 1398 1399 /* This is a debugging symbol. */ 1400 cache_ptr->symbol.flags = BSF_DEBUGGING; 1401 1402 /* Work out the symbol section. */ 1403 switch (cache_ptr->type & N_TYPE) 1404 { 1405 case N_TEXT: 1406 case N_FN: 1407 sec = obj_textsec (abfd); 1408 break; 1409 case N_DATA: 1410 sec = obj_datasec (abfd); 1411 break; 1412 case N_BSS: 1413 sec = obj_bsssec (abfd); 1414 break; 1415 default: 1416 case N_ABS: 1417 sec = bfd_abs_section_ptr; 1418 break; 1419 } 1420 1421 cache_ptr->symbol.section = sec; 1422 cache_ptr->symbol.value -= sec->vma; 1423 1424 return TRUE; 1425 } 1426 1427 /* Get the default visibility. This does not apply to all types, so 1428 we just hold it in a local variable to use if wanted. */ 1429 if ((cache_ptr->type & N_EXT) == 0) 1430 visible = BSF_LOCAL; 1431 else 1432 visible = BSF_GLOBAL; 1433 1434 switch (cache_ptr->type) 1435 { 1436 default: 1437 case N_ABS: case N_ABS | N_EXT: 1438 cache_ptr->symbol.section = bfd_abs_section_ptr; 1439 cache_ptr->symbol.flags = visible; 1440 break; 1441 1442 case N_UNDF | N_EXT: 1443 if (cache_ptr->symbol.value != 0) 1444 { 1445 /* This is a common symbol. */ 1446 cache_ptr->symbol.flags = BSF_GLOBAL; 1447 cache_ptr->symbol.section = bfd_com_section_ptr; 1448 } 1449 else 1450 { 1451 cache_ptr->symbol.flags = 0; 1452 cache_ptr->symbol.section = bfd_und_section_ptr; 1453 } 1454 break; 1455 1456 case N_TEXT: case N_TEXT | N_EXT: 1457 cache_ptr->symbol.section = obj_textsec (abfd); 1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1459 cache_ptr->symbol.flags = visible; 1460 break; 1461 1462 /* N_SETV symbols used to represent set vectors placed in the 1463 data section. They are no longer generated. Theoretically, 1464 it was possible to extract the entries and combine them with 1465 new ones, although I don't know if that was ever actually 1466 done. Unless that feature is restored, treat them as data 1467 symbols. */ 1468 case N_SETV: case N_SETV | N_EXT: 1469 case N_DATA: case N_DATA | N_EXT: 1470 cache_ptr->symbol.section = obj_datasec (abfd); 1471 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1472 cache_ptr->symbol.flags = visible; 1473 break; 1474 1475 case N_BSS: case N_BSS | N_EXT: 1476 cache_ptr->symbol.section = obj_bsssec (abfd); 1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1478 cache_ptr->symbol.flags = visible; 1479 break; 1480 1481 case N_SETA: case N_SETA | N_EXT: 1482 case N_SETT: case N_SETT | N_EXT: 1483 case N_SETD: case N_SETD | N_EXT: 1484 case N_SETB: case N_SETB | N_EXT: 1485 { 1486 /* This code is no longer needed. It used to be used to make 1487 the linker handle set symbols, but they are now handled in 1488 the add_symbols routine instead. */ 1489 switch (cache_ptr->type & N_TYPE) 1490 { 1491 case N_SETA: 1492 cache_ptr->symbol.section = bfd_abs_section_ptr; 1493 break; 1494 case N_SETT: 1495 cache_ptr->symbol.section = obj_textsec (abfd); 1496 break; 1497 case N_SETD: 1498 cache_ptr->symbol.section = obj_datasec (abfd); 1499 break; 1500 case N_SETB: 1501 cache_ptr->symbol.section = obj_bsssec (abfd); 1502 break; 1503 } 1504 1505 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1506 } 1507 break; 1508 1509 case N_WARNING: 1510 /* This symbol is the text of a warning message. The next 1511 symbol is the symbol to associate the warning with. If a 1512 reference is made to that symbol, a warning is issued. */ 1513 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1514 cache_ptr->symbol.section = bfd_abs_section_ptr; 1515 break; 1516 1517 case N_INDR: case N_INDR | N_EXT: 1518 /* An indirect symbol. This consists of two symbols in a row. 1519 The first symbol is the name of the indirection. The second 1520 symbol is the name of the target. A reference to the first 1521 symbol becomes a reference to the second. */ 1522 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1523 cache_ptr->symbol.section = bfd_ind_section_ptr; 1524 break; 1525 1526 case N_WEAKU: 1527 cache_ptr->symbol.section = bfd_und_section_ptr; 1528 cache_ptr->symbol.flags = BSF_WEAK; 1529 break; 1530 1531 case N_WEAKA: 1532 cache_ptr->symbol.section = bfd_abs_section_ptr; 1533 cache_ptr->symbol.flags = BSF_WEAK; 1534 break; 1535 1536 case N_WEAKT: 1537 cache_ptr->symbol.section = obj_textsec (abfd); 1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1539 cache_ptr->symbol.flags = BSF_WEAK; 1540 break; 1541 1542 case N_WEAKD: 1543 cache_ptr->symbol.section = obj_datasec (abfd); 1544 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1545 cache_ptr->symbol.flags = BSF_WEAK; 1546 break; 1547 1548 case N_WEAKB: 1549 cache_ptr->symbol.section = obj_bsssec (abfd); 1550 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1551 cache_ptr->symbol.flags = BSF_WEAK; 1552 break; 1553 } 1554 1555 return TRUE; 1556} 1557 1558/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1559 1560static bfd_boolean 1561translate_to_native_sym_flags (bfd *abfd, 1562 asymbol *cache_ptr, 1563 struct external_nlist *sym_pointer) 1564{ 1565 bfd_vma value = cache_ptr->value; 1566 asection *sec; 1567 bfd_vma off; 1568 1569 /* Mask out any existing type bits in case copying from one section 1570 to another. */ 1571 sym_pointer->e_type[0] &= ~N_TYPE; 1572 1573 sec = bfd_get_section (cache_ptr); 1574 off = 0; 1575 1576 if (sec == NULL) 1577 { 1578 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1579 file. */ 1580 _bfd_error_handler 1581 /* xgettext:c-format */ 1582 (_("%pB: can not represent section for symbol `%s' in a.out " 1583 "object file format"), 1584 abfd, 1585 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1586 bfd_set_error (bfd_error_nonrepresentable_section); 1587 return FALSE; 1588 } 1589 1590 if (sec->output_section != NULL) 1591 { 1592 off = sec->output_offset; 1593 sec = sec->output_section; 1594 } 1595 1596 if (bfd_is_abs_section (sec)) 1597 sym_pointer->e_type[0] |= N_ABS; 1598 else if (sec == obj_textsec (abfd)) 1599 sym_pointer->e_type[0] |= N_TEXT; 1600 else if (sec == obj_datasec (abfd)) 1601 sym_pointer->e_type[0] |= N_DATA; 1602 else if (sec == obj_bsssec (abfd)) 1603 sym_pointer->e_type[0] |= N_BSS; 1604 else if (bfd_is_und_section (sec)) 1605 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1606 else if (bfd_is_ind_section (sec)) 1607 sym_pointer->e_type[0] = N_INDR; 1608 else if (bfd_is_com_section (sec)) 1609 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1610 else 1611 { 1612 if (aout_section_merge_with_text_p (abfd, sec)) 1613 sym_pointer->e_type[0] |= N_TEXT; 1614 else 1615 { 1616 _bfd_error_handler 1617 /* xgettext:c-format */ 1618 (_("%pB: can not represent section `%pA' in a.out object file format"), 1619 abfd, sec); 1620 bfd_set_error (bfd_error_nonrepresentable_section); 1621 return FALSE; 1622 } 1623 } 1624 1625 /* Turn the symbol from section relative to absolute again. */ 1626 value += sec->vma + off; 1627 1628 if ((cache_ptr->flags & BSF_WARNING) != 0) 1629 sym_pointer->e_type[0] = N_WARNING; 1630 1631 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1632 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1633 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1634 sym_pointer->e_type[0] |= N_EXT; 1635 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1636 sym_pointer->e_type[0] &= ~N_EXT; 1637 1638 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1639 { 1640 int type = ((aout_symbol_type *) cache_ptr)->type; 1641 1642 switch (type) 1643 { 1644 case N_ABS: type = N_SETA; break; 1645 case N_TEXT: type = N_SETT; break; 1646 case N_DATA: type = N_SETD; break; 1647 case N_BSS: type = N_SETB; break; 1648 } 1649 sym_pointer->e_type[0] = type; 1650 } 1651 1652 if ((cache_ptr->flags & BSF_WEAK) != 0) 1653 { 1654 int type; 1655 1656 switch (sym_pointer->e_type[0] & N_TYPE) 1657 { 1658 default: 1659 case N_ABS: type = N_WEAKA; break; 1660 case N_TEXT: type = N_WEAKT; break; 1661 case N_DATA: type = N_WEAKD; break; 1662 case N_BSS: type = N_WEAKB; break; 1663 case N_UNDF: type = N_WEAKU; break; 1664 } 1665 sym_pointer->e_type[0] = type; 1666 } 1667 1668 PUT_WORD (abfd, value, sym_pointer->e_value); 1669 1670 return TRUE; 1671} 1672 1673/* Native-level interface to symbols. */ 1674 1675asymbol * 1676NAME (aout, make_empty_symbol) (bfd *abfd) 1677{ 1678 bfd_size_type amt = sizeof (aout_symbol_type); 1679 1680 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt); 1681 if (!new_symbol) 1682 return NULL; 1683 new_symbol->symbol.the_bfd = abfd; 1684 1685 return &new_symbol->symbol; 1686} 1687 1688/* Translate a set of internal symbols into external symbols. */ 1689 1690bfd_boolean 1691NAME (aout, translate_symbol_table) (bfd *abfd, 1692 aout_symbol_type *in, 1693 struct external_nlist *ext, 1694 bfd_size_type count, 1695 char *str, 1696 bfd_size_type strsize, 1697 bfd_boolean dynamic) 1698{ 1699 struct external_nlist *ext_end; 1700 1701 ext_end = ext + count; 1702 for (; ext < ext_end; ext++, in++) 1703 { 1704 bfd_vma x; 1705 1706 x = GET_WORD (abfd, ext->e_strx); 1707 in->symbol.the_bfd = abfd; 1708 1709 /* For the normal symbols, the zero index points at the number 1710 of bytes in the string table but is to be interpreted as the 1711 null string. For the dynamic symbols, the number of bytes in 1712 the string table is stored in the __DYNAMIC structure and the 1713 zero index points at an actual string. */ 1714 if (x == 0 && ! dynamic) 1715 in->symbol.name = ""; 1716 else if (x < strsize) 1717 in->symbol.name = str + x; 1718 else 1719 { 1720 _bfd_error_handler 1721 (_("%pB: invalid string offset %" PRIu64 " >= %" PRIu64), 1722 abfd, (uint64_t) x, (uint64_t) strsize); 1723 bfd_set_error (bfd_error_bad_value); 1724 return FALSE; 1725 } 1726 1727 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1728 in->desc = H_GET_16 (abfd, ext->e_desc); 1729 in->other = H_GET_8 (abfd, ext->e_other); 1730 in->type = H_GET_8 (abfd, ext->e_type); 1731 in->symbol.udata.p = NULL; 1732 1733 if (! translate_from_native_sym_flags (abfd, in)) 1734 return FALSE; 1735 1736 if (dynamic) 1737 in->symbol.flags |= BSF_DYNAMIC; 1738 } 1739 1740 return TRUE; 1741} 1742 1743/* We read the symbols into a buffer, which is discarded when this 1744 function exits. We read the strings into a buffer large enough to 1745 hold them all plus all the cached symbol entries. */ 1746 1747bfd_boolean 1748NAME (aout, slurp_symbol_table) (bfd *abfd) 1749{ 1750 struct external_nlist *old_external_syms; 1751 aout_symbol_type *cached; 1752 bfd_size_type cached_size; 1753 1754 /* If there's no work to be done, don't do any. */ 1755 if (obj_aout_symbols (abfd) != NULL) 1756 return TRUE; 1757 1758 old_external_syms = obj_aout_external_syms (abfd); 1759 1760 if (! aout_get_external_symbols (abfd)) 1761 return FALSE; 1762 1763 cached_size = obj_aout_external_sym_count (abfd); 1764 if (cached_size == 0) 1765 return TRUE; /* Nothing to do. */ 1766 1767 cached_size *= sizeof (aout_symbol_type); 1768 cached = (aout_symbol_type *) bfd_zmalloc (cached_size); 1769 if (cached == NULL) 1770 return FALSE; 1771 1772 /* Convert from external symbol information to internal. */ 1773 if (! (NAME (aout, translate_symbol_table) 1774 (abfd, cached, 1775 obj_aout_external_syms (abfd), 1776 obj_aout_external_sym_count (abfd), 1777 obj_aout_external_strings (abfd), 1778 obj_aout_external_string_size (abfd), 1779 FALSE))) 1780 { 1781 free (cached); 1782 return FALSE; 1783 } 1784 1785 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1786 1787 obj_aout_symbols (abfd) = cached; 1788 1789 /* It is very likely that anybody who calls this function will not 1790 want the external symbol information, so if it was allocated 1791 because of our call to aout_get_external_symbols, we free it up 1792 right away to save space. */ 1793 if (old_external_syms == NULL 1794 && obj_aout_external_syms (abfd) != NULL) 1795 { 1796#ifdef USE_MMAP 1797 bfd_free_window (&obj_aout_sym_window (abfd)); 1798#else 1799 free (obj_aout_external_syms (abfd)); 1800#endif 1801 obj_aout_external_syms (abfd) = NULL; 1802 } 1803 1804 return TRUE; 1805} 1806 1807/* We use a hash table when writing out symbols so that we only write 1808 out a particular string once. This helps particularly when the 1809 linker writes out stabs debugging entries, because each different 1810 contributing object file tends to have many duplicate stabs 1811 strings. 1812 1813 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1814 if BFD_TRADITIONAL_FORMAT is set. */ 1815 1816/* Get the index of a string in a strtab, adding it if it is not 1817 already present. */ 1818 1819static inline bfd_size_type 1820add_to_stringtab (bfd *abfd, 1821 struct bfd_strtab_hash *tab, 1822 const char *str, 1823 bfd_boolean copy) 1824{ 1825 bfd_boolean hash; 1826 bfd_size_type str_index; 1827 1828 /* An index of 0 always means the empty string. */ 1829 if (str == 0 || *str == '\0') 1830 return 0; 1831 1832 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1833 doesn't understand a hashed string table. */ 1834 hash = TRUE; 1835 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1836 hash = FALSE; 1837 1838 str_index = _bfd_stringtab_add (tab, str, hash, copy); 1839 1840 if (str_index != (bfd_size_type) -1) 1841 /* Add BYTES_IN_WORD to the return value to account for the 1842 space taken up by the string table size. */ 1843 str_index += BYTES_IN_WORD; 1844 1845 return str_index; 1846} 1847 1848/* Write out a strtab. ABFD is already at the right location in the 1849 file. */ 1850 1851static bfd_boolean 1852emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) 1853{ 1854 bfd_byte buffer[BYTES_IN_WORD]; 1855 bfd_size_type amt = BYTES_IN_WORD; 1856 1857 /* The string table starts with the size. */ 1858 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1859 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt) 1860 return FALSE; 1861 1862 return _bfd_stringtab_emit (abfd, tab); 1863} 1864 1865bfd_boolean 1866NAME (aout, write_syms) (bfd *abfd) 1867{ 1868 unsigned int count ; 1869 asymbol **generic = bfd_get_outsymbols (abfd); 1870 struct bfd_strtab_hash *strtab; 1871 1872 strtab = _bfd_stringtab_init (); 1873 if (strtab == NULL) 1874 return FALSE; 1875 1876 for (count = 0; count < bfd_get_symcount (abfd); count++) 1877 { 1878 asymbol *g = generic[count]; 1879 bfd_size_type indx; 1880 struct external_nlist nsp; 1881 bfd_size_type amt; 1882 1883 indx = add_to_stringtab (abfd, strtab, g->name, FALSE); 1884 if (indx == (bfd_size_type) -1) 1885 goto error_return; 1886 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1887 1888 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1889 { 1890 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1891 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1892 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1893 } 1894 else 1895 { 1896 H_PUT_16 (abfd, 0, nsp.e_desc); 1897 H_PUT_8 (abfd, 0, nsp.e_other); 1898 H_PUT_8 (abfd, 0, nsp.e_type); 1899 } 1900 1901 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1902 goto error_return; 1903 1904 amt = EXTERNAL_NLIST_SIZE; 1905 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt) 1906 goto error_return; 1907 1908 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1909 here, at the end. */ 1910 g->KEEPIT = count; 1911 } 1912 1913 if (! emit_stringtab (abfd, strtab)) 1914 goto error_return; 1915 1916 _bfd_stringtab_free (strtab); 1917 1918 return TRUE; 1919 1920error_return: 1921 _bfd_stringtab_free (strtab); 1922 return FALSE; 1923} 1924 1925long 1926NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) 1927{ 1928 unsigned int counter = 0; 1929 aout_symbol_type *symbase; 1930 1931 if (!NAME (aout, slurp_symbol_table) (abfd)) 1932 return -1; 1933 1934 for (symbase = obj_aout_symbols (abfd); 1935 counter++ < bfd_get_symcount (abfd); 1936 ) 1937 *(location++) = (asymbol *) (symbase++); 1938 *location++ =0; 1939 return bfd_get_symcount (abfd); 1940} 1941 1942/* Standard reloc stuff. */ 1943/* Output standard relocation information to a file in target byte order. */ 1944 1945extern void NAME (aout, swap_std_reloc_out) 1946 (bfd *, arelent *, struct reloc_std_external *); 1947 1948void 1949NAME (aout, swap_std_reloc_out) (bfd *abfd, 1950 arelent *g, 1951 struct reloc_std_external *natptr) 1952{ 1953 int r_index; 1954 asymbol *sym = *(g->sym_ptr_ptr); 1955 int r_extern; 1956 unsigned int r_length; 1957 int r_pcrel; 1958 int r_baserel, r_jmptable, r_relative; 1959 asection *output_section = sym->section->output_section; 1960 1961 PUT_WORD (abfd, g->address, natptr->r_address); 1962 1963 BFD_ASSERT (g->howto != NULL); 1964 r_length = g->howto->size ; /* Size as a power of two. */ 1965 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 1966 /* XXX This relies on relocs coming from a.out files. */ 1967 r_baserel = (g->howto->type & 8) != 0; 1968 r_jmptable = (g->howto->type & 16) != 0; 1969 r_relative = (g->howto->type & 32) != 0; 1970 1971 /* Name was clobbered by aout_write_syms to be symbol index. */ 1972 1973 /* If this relocation is relative to a symbol then set the 1974 r_index to the symbols index, and the r_extern bit. 1975 1976 Absolute symbols can come in in two ways, either as an offset 1977 from the abs section, or as a symbol which has an abs value. 1978 check for that here. */ 1979 1980 if (bfd_is_com_section (output_section) 1981 || bfd_is_abs_section (output_section) 1982 || bfd_is_und_section (output_section) 1983 /* PR gas/3041 a.out relocs against weak symbols 1984 must be treated as if they were against externs. */ 1985 || (sym->flags & BSF_WEAK)) 1986 { 1987 if (bfd_abs_section_ptr->symbol == sym) 1988 { 1989 /* Whoops, looked like an abs symbol, but is 1990 really an offset from the abs section. */ 1991 r_index = N_ABS; 1992 r_extern = 0; 1993 } 1994 else 1995 { 1996 /* Fill in symbol. */ 1997 r_extern = 1; 1998 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 1999 } 2000 } 2001 else 2002 { 2003 /* Just an ordinary section. */ 2004 r_extern = 0; 2005 r_index = output_section->target_index; 2006 } 2007 2008 /* Now the fun stuff. */ 2009 if (bfd_header_big_endian (abfd)) 2010 { 2011 natptr->r_index[0] = r_index >> 16; 2012 natptr->r_index[1] = r_index >> 8; 2013 natptr->r_index[2] = r_index; 2014 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 2015 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 2016 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 2017 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 2018 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 2019 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 2020 } 2021 else 2022 { 2023 natptr->r_index[2] = r_index >> 16; 2024 natptr->r_index[1] = r_index >> 8; 2025 natptr->r_index[0] = r_index; 2026 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2027 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2028 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2029 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2030 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2031 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2032 } 2033} 2034 2035/* Extended stuff. */ 2036/* Output extended relocation information to a file in target byte order. */ 2037 2038extern void NAME (aout, swap_ext_reloc_out) 2039 (bfd *, arelent *, struct reloc_ext_external *); 2040 2041void 2042NAME (aout, swap_ext_reloc_out) (bfd *abfd, 2043 arelent *g, 2044 struct reloc_ext_external *natptr) 2045{ 2046 int r_index; 2047 int r_extern; 2048 unsigned int r_type; 2049 bfd_vma r_addend; 2050 asymbol *sym = *(g->sym_ptr_ptr); 2051 asection *output_section = sym->section->output_section; 2052 2053 PUT_WORD (abfd, g->address, natptr->r_address); 2054 2055 r_type = (unsigned int) g->howto->type; 2056 2057 r_addend = g->addend; 2058 if ((sym->flags & BSF_SECTION_SYM) != 0) 2059 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2060 2061 /* If this relocation is relative to a symbol then set the 2062 r_index to the symbols index, and the r_extern bit. 2063 2064 Absolute symbols can come in in two ways, either as an offset 2065 from the abs section, or as a symbol which has an abs value. 2066 check for that here. */ 2067 if (bfd_is_abs_section (bfd_get_section (sym))) 2068 { 2069 r_extern = 0; 2070 r_index = N_ABS; 2071 } 2072 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2073 { 2074 if (bfd_is_und_section (bfd_get_section (sym)) 2075 || (sym->flags & BSF_GLOBAL) != 0) 2076 r_extern = 1; 2077 else 2078 r_extern = 0; 2079 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2080 } 2081 else 2082 { 2083 /* Just an ordinary section. */ 2084 r_extern = 0; 2085 r_index = output_section->target_index; 2086 } 2087 2088 /* Now the fun stuff. */ 2089 if (bfd_header_big_endian (abfd)) 2090 { 2091 natptr->r_index[0] = r_index >> 16; 2092 natptr->r_index[1] = r_index >> 8; 2093 natptr->r_index[2] = r_index; 2094 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2095 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2096 } 2097 else 2098 { 2099 natptr->r_index[2] = r_index >> 16; 2100 natptr->r_index[1] = r_index >> 8; 2101 natptr->r_index[0] = r_index; 2102 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2103 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2104 } 2105 2106 PUT_WORD (abfd, r_addend, natptr->r_addend); 2107} 2108 2109/* BFD deals internally with all things based from the section they're 2110 in. so, something in 10 bytes into a text section with a base of 2111 50 would have a symbol (.text+10) and know .text vma was 50. 2112 2113 Aout keeps all it's symbols based from zero, so the symbol would 2114 contain 60. This macro subs the base of each section from the value 2115 to give the true offset from the section. */ 2116 2117#define MOVE_ADDRESS(ad) \ 2118 if (r_extern) \ 2119 { \ 2120 /* Undefined symbol. */ \ 2121 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2122 cache_ptr->addend = ad; \ 2123 } \ 2124 else \ 2125 { \ 2126 /* Defined, section relative. Replace symbol with pointer to \ 2127 symbol which points to section. */ \ 2128 switch (r_index) \ 2129 { \ 2130 case N_TEXT: \ 2131 case N_TEXT | N_EXT: \ 2132 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2133 cache_ptr->addend = ad - su->textsec->vma; \ 2134 break; \ 2135 case N_DATA: \ 2136 case N_DATA | N_EXT: \ 2137 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2138 cache_ptr->addend = ad - su->datasec->vma; \ 2139 break; \ 2140 case N_BSS: \ 2141 case N_BSS | N_EXT: \ 2142 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2143 cache_ptr->addend = ad - su->bsssec->vma; \ 2144 break; \ 2145 default: \ 2146 case N_ABS: \ 2147 case N_ABS | N_EXT: \ 2148 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2149 cache_ptr->addend = ad; \ 2150 break; \ 2151 } \ 2152 } 2153 2154void 2155NAME (aout, swap_ext_reloc_in) (bfd *abfd, 2156 struct reloc_ext_external *bytes, 2157 arelent *cache_ptr, 2158 asymbol **symbols, 2159 bfd_size_type symcount) 2160{ 2161 unsigned int r_index; 2162 int r_extern; 2163 unsigned int r_type; 2164 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2165 2166 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2167 2168 /* Now the fun stuff. */ 2169 if (bfd_header_big_endian (abfd)) 2170 { 2171 r_index = (((unsigned int) bytes->r_index[0] << 16) 2172 | ((unsigned int) bytes->r_index[1] << 8) 2173 | bytes->r_index[2]); 2174 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2175 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2176 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2177 } 2178 else 2179 { 2180 r_index = (((unsigned int) bytes->r_index[2] << 16) 2181 | ((unsigned int) bytes->r_index[1] << 8) 2182 | bytes->r_index[0]); 2183 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2184 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2185 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2186 } 2187 2188 if (r_type < TABLE_SIZE (howto_table_ext)) 2189 cache_ptr->howto = howto_table_ext + r_type; 2190 else 2191 cache_ptr->howto = NULL; 2192 2193 /* Base relative relocs are always against the symbol table, 2194 regardless of the setting of r_extern. r_extern just reflects 2195 whether the symbol the reloc is against is local or global. */ 2196 if (r_type == (unsigned int) RELOC_BASE10 2197 || r_type == (unsigned int) RELOC_BASE13 2198 || r_type == (unsigned int) RELOC_BASE22) 2199 r_extern = 1; 2200 2201 if (r_extern && r_index > symcount) 2202 { 2203 /* We could arrange to return an error, but it might be useful 2204 to see the file even if it is bad. */ 2205 r_extern = 0; 2206 r_index = N_ABS; 2207 } 2208 2209 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2210} 2211 2212void 2213NAME (aout, swap_std_reloc_in) (bfd *abfd, 2214 struct reloc_std_external *bytes, 2215 arelent *cache_ptr, 2216 asymbol **symbols, 2217 bfd_size_type symcount) 2218{ 2219 unsigned int r_index; 2220 int r_extern; 2221 unsigned int r_length; 2222 int r_pcrel; 2223 int r_baserel, r_jmptable, r_relative; 2224 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2225 unsigned int howto_idx; 2226 2227 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2228 2229 /* Now the fun stuff. */ 2230 if (bfd_header_big_endian (abfd)) 2231 { 2232 r_index = (((unsigned int) bytes->r_index[0] << 16) 2233 | ((unsigned int) bytes->r_index[1] << 8) 2234 | bytes->r_index[2]); 2235 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2236 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2237 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2238 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2239 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2240 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2241 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2242 } 2243 else 2244 { 2245 r_index = (((unsigned int) bytes->r_index[2] << 16) 2246 | ((unsigned int) bytes->r_index[1] << 8) 2247 | bytes->r_index[0]); 2248 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2249 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2250 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2251 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2252 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2253 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2254 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2255 } 2256 2257 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2258 + 16 * r_jmptable + 32 * r_relative); 2259 if (howto_idx < TABLE_SIZE (howto_table_std)) 2260 { 2261 cache_ptr->howto = howto_table_std + howto_idx; 2262 if (cache_ptr->howto->type == (unsigned int) -1) 2263 cache_ptr->howto = NULL; 2264 } 2265 else 2266 cache_ptr->howto = NULL; 2267 2268 /* Base relative relocs are always against the symbol table, 2269 regardless of the setting of r_extern. r_extern just reflects 2270 whether the symbol the reloc is against is local or global. */ 2271 if (r_baserel) 2272 r_extern = 1; 2273 2274 if (r_extern && r_index >= symcount) 2275 { 2276 /* We could arrange to return an error, but it might be useful 2277 to see the file even if it is bad. FIXME: Of course this 2278 means that objdump -r *doesn't* see the actual reloc, and 2279 objcopy silently writes a different reloc. */ 2280 r_extern = 0; 2281 r_index = N_ABS; 2282 } 2283 2284 MOVE_ADDRESS (0); 2285} 2286 2287/* Read and swap the relocs for a section. */ 2288 2289bfd_boolean 2290NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) 2291{ 2292 bfd_size_type count; 2293 bfd_size_type reloc_size; 2294 void * relocs; 2295 arelent *reloc_cache; 2296 size_t each_size; 2297 unsigned int counter = 0; 2298 arelent *cache_ptr; 2299 bfd_size_type amt; 2300 2301 if (asect->relocation) 2302 return TRUE; 2303 2304 if (asect->flags & SEC_CONSTRUCTOR) 2305 return TRUE; 2306 2307 if (asect == obj_datasec (abfd)) 2308 reloc_size = exec_hdr (abfd)->a_drsize; 2309 else if (asect == obj_textsec (abfd)) 2310 reloc_size = exec_hdr (abfd)->a_trsize; 2311 else if (asect == obj_bsssec (abfd)) 2312 reloc_size = 0; 2313 else 2314 { 2315 bfd_set_error (bfd_error_invalid_operation); 2316 return FALSE; 2317 } 2318 2319 if (reloc_size == 0) 2320 return TRUE; /* Nothing to be done. */ 2321 2322 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2323 return FALSE; 2324 2325 each_size = obj_reloc_entry_size (abfd); 2326 2327 count = reloc_size / each_size; 2328 if (count == 0) 2329 return TRUE; /* Nothing to be done. */ 2330 2331 amt = count * sizeof (arelent); 2332 reloc_cache = (arelent *) bfd_zmalloc (amt); 2333 if (reloc_cache == NULL) 2334 return FALSE; 2335 2336 relocs = bfd_malloc (reloc_size); 2337 if (relocs == NULL) 2338 { 2339 free (reloc_cache); 2340 return FALSE; 2341 } 2342 2343 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2344 { 2345 free (relocs); 2346 free (reloc_cache); 2347 return FALSE; 2348 } 2349 2350 cache_ptr = reloc_cache; 2351 if (each_size == RELOC_EXT_SIZE) 2352 { 2353 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2354 2355 for (; counter < count; counter++, rptr++, cache_ptr++) 2356 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2357 (bfd_size_type) bfd_get_symcount (abfd)); 2358 } 2359 else 2360 { 2361 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2362 2363 for (; counter < count; counter++, rptr++, cache_ptr++) 2364 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2365 (bfd_size_type) bfd_get_symcount (abfd)); 2366 } 2367 2368 free (relocs); 2369 2370 asect->relocation = reloc_cache; 2371 asect->reloc_count = cache_ptr - reloc_cache; 2372 2373 return TRUE; 2374} 2375 2376/* Write out a relocation section into an object file. */ 2377 2378bfd_boolean 2379NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) 2380{ 2381 arelent **generic; 2382 unsigned char *native, *natptr; 2383 size_t each_size; 2384 2385 unsigned int count = section->reloc_count; 2386 bfd_size_type natsize; 2387 2388 if (count == 0 || section->orelocation == NULL) 2389 return TRUE; 2390 2391 each_size = obj_reloc_entry_size (abfd); 2392 natsize = (bfd_size_type) each_size * count; 2393 native = (unsigned char *) bfd_zalloc (abfd, natsize); 2394 if (!native) 2395 return FALSE; 2396 2397 generic = section->orelocation; 2398 2399 if (each_size == RELOC_EXT_SIZE) 2400 { 2401 for (natptr = native; 2402 count != 0; 2403 --count, natptr += each_size, ++generic) 2404 { 2405 /* PR 20921: If the howto field has not been initialised then skip 2406 this reloc. 2407 PR 20929: Similarly for the symbol field. */ 2408 if ((*generic)->howto == NULL 2409 || (*generic)->sym_ptr_ptr == NULL) 2410 { 2411 bfd_set_error (bfd_error_invalid_operation); 2412 _bfd_error_handler (_("\ 2413%pB: attempt to write out unknown reloc type"), abfd); 2414 return FALSE; 2415 } 2416 MY_swap_ext_reloc_out (abfd, *generic, 2417 (struct reloc_ext_external *) natptr); 2418 } 2419 } 2420 else 2421 { 2422 for (natptr = native; 2423 count != 0; 2424 --count, natptr += each_size, ++generic) 2425 { 2426 if ((*generic)->howto == NULL 2427 || (*generic)->sym_ptr_ptr == NULL) 2428 { 2429 bfd_set_error (bfd_error_invalid_operation); 2430 _bfd_error_handler (_("\ 2431%pB: attempt to write out unknown reloc type"), abfd); 2432 return FALSE; 2433 } 2434 MY_swap_std_reloc_out (abfd, *generic, 2435 (struct reloc_std_external *) natptr); 2436 } 2437 } 2438 2439 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) 2440 { 2441 bfd_release (abfd, native); 2442 return FALSE; 2443 } 2444 bfd_release (abfd, native); 2445 2446 return TRUE; 2447} 2448 2449/* This is stupid. This function should be a boolean predicate. */ 2450 2451long 2452NAME (aout, canonicalize_reloc) (bfd *abfd, 2453 sec_ptr section, 2454 arelent **relptr, 2455 asymbol **symbols) 2456{ 2457 arelent *tblptr = section->relocation; 2458 unsigned int count; 2459 2460 if (section == obj_bsssec (abfd)) 2461 { 2462 *relptr = NULL; 2463 return 0; 2464 } 2465 2466 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols))) 2467 return -1; 2468 2469 if (section->flags & SEC_CONSTRUCTOR) 2470 { 2471 arelent_chain *chain = section->constructor_chain; 2472 for (count = 0; count < section->reloc_count; count ++) 2473 { 2474 *relptr ++ = &chain->relent; 2475 chain = chain->next; 2476 } 2477 } 2478 else 2479 { 2480 tblptr = section->relocation; 2481 2482 for (count = 0; count++ < section->reloc_count; ) 2483 { 2484 *relptr++ = tblptr++; 2485 } 2486 } 2487 *relptr = 0; 2488 2489 return section->reloc_count; 2490} 2491 2492long 2493NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) 2494{ 2495 bfd_size_type count; 2496 2497 if (bfd_get_format (abfd) != bfd_object) 2498 { 2499 bfd_set_error (bfd_error_invalid_operation); 2500 return -1; 2501 } 2502 2503 if (asect->flags & SEC_CONSTRUCTOR) 2504 count = asect->reloc_count; 2505 else if (asect == obj_datasec (abfd)) 2506 count = exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 2507 else if (asect == obj_textsec (abfd)) 2508 count = exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 2509 else if (asect == obj_bsssec (abfd)) 2510 count = 0; 2511 else 2512 { 2513 bfd_set_error (bfd_error_invalid_operation); 2514 return -1; 2515 } 2516 2517 if (count >= LONG_MAX / sizeof (arelent *)) 2518 { 2519 bfd_set_error (bfd_error_file_too_big); 2520 return -1; 2521 } 2522 return (count + 1) * sizeof (arelent *); 2523} 2524 2525long 2526NAME (aout, get_symtab_upper_bound) (bfd *abfd) 2527{ 2528 if (!NAME (aout, slurp_symbol_table) (abfd)) 2529 return -1; 2530 2531 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2532} 2533 2534alent * 2535NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2536 asymbol *ignore_symbol ATTRIBUTE_UNUSED) 2537{ 2538 return NULL; 2539} 2540 2541void 2542NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2543 asymbol *symbol, 2544 symbol_info *ret) 2545{ 2546 bfd_symbol_info (symbol, ret); 2547 2548 if (ret->type == '?') 2549 { 2550 int type_code = aout_symbol (symbol)->type & 0xff; 2551 const char *stab_name = bfd_get_stab_name (type_code); 2552 static char buf[10]; 2553 2554 if (stab_name == NULL) 2555 { 2556 sprintf (buf, "(%d)", type_code); 2557 stab_name = buf; 2558 } 2559 ret->type = '-'; 2560 ret->stab_type = type_code; 2561 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2562 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2563 ret->stab_name = stab_name; 2564 } 2565} 2566 2567void 2568NAME (aout, print_symbol) (bfd *abfd, 2569 void * afile, 2570 asymbol *symbol, 2571 bfd_print_symbol_type how) 2572{ 2573 FILE *file = (FILE *)afile; 2574 2575 switch (how) 2576 { 2577 case bfd_print_symbol_name: 2578 if (symbol->name) 2579 fprintf (file,"%s", symbol->name); 2580 break; 2581 case bfd_print_symbol_more: 2582 fprintf (file,"%4x %2x %2x", 2583 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2584 (unsigned) (aout_symbol (symbol)->other & 0xff), 2585 (unsigned) (aout_symbol (symbol)->type)); 2586 break; 2587 case bfd_print_symbol_all: 2588 { 2589 const char *section_name = symbol->section->name; 2590 2591 bfd_print_symbol_vandf (abfd, (void *)file, symbol); 2592 2593 fprintf (file," %-5s %04x %02x %02x", 2594 section_name, 2595 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2596 (unsigned) (aout_symbol (symbol)->other & 0xff), 2597 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2598 if (symbol->name) 2599 fprintf (file," %s", symbol->name); 2600 } 2601 break; 2602 } 2603} 2604 2605/* If we don't have to allocate more than 1MB to hold the generic 2606 symbols, we use the generic minisymbol methord: it's faster, since 2607 it only translates the symbols once, not multiple times. */ 2608#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2609 2610/* Read minisymbols. For minisymbols, we use the unmodified a.out 2611 symbols. The minisymbol_to_symbol function translates these into 2612 BFD asymbol structures. */ 2613 2614long 2615NAME (aout, read_minisymbols) (bfd *abfd, 2616 bfd_boolean dynamic, 2617 void * *minisymsp, 2618 unsigned int *sizep) 2619{ 2620 if (dynamic) 2621 /* We could handle the dynamic symbols here as well, but it's 2622 easier to hand them off. */ 2623 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2624 2625 if (! aout_get_external_symbols (abfd)) 2626 return -1; 2627 2628 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2629 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2630 2631 *minisymsp = (void *) obj_aout_external_syms (abfd); 2632 2633 /* By passing the external symbols back from this routine, we are 2634 giving up control over the memory block. Clear 2635 obj_aout_external_syms, so that we do not try to free it 2636 ourselves. */ 2637 obj_aout_external_syms (abfd) = NULL; 2638 2639 *sizep = EXTERNAL_NLIST_SIZE; 2640 return obj_aout_external_sym_count (abfd); 2641} 2642 2643/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2644 unmodified a.out symbol. The SYM argument is a structure returned 2645 by bfd_make_empty_symbol, which we fill in here. */ 2646 2647asymbol * 2648NAME (aout, minisymbol_to_symbol) (bfd *abfd, 2649 bfd_boolean dynamic, 2650 const void * minisym, 2651 asymbol *sym) 2652{ 2653 if (dynamic 2654 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2655 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2656 2657 memset (sym, 0, sizeof (aout_symbol_type)); 2658 2659 /* We call translate_symbol_table to translate a single symbol. */ 2660 if (! (NAME (aout, translate_symbol_table) 2661 (abfd, 2662 (aout_symbol_type *) sym, 2663 (struct external_nlist *) minisym, 2664 (bfd_size_type) 1, 2665 obj_aout_external_strings (abfd), 2666 obj_aout_external_string_size (abfd), 2667 FALSE))) 2668 return NULL; 2669 2670 return sym; 2671} 2672 2673/* Provided a BFD, a section and an offset into the section, calculate 2674 and return the name of the source file and the line nearest to the 2675 wanted location. */ 2676 2677bfd_boolean 2678NAME (aout, find_nearest_line) (bfd *abfd, 2679 asymbol **symbols, 2680 asection *section, 2681 bfd_vma offset, 2682 const char **filename_ptr, 2683 const char **functionname_ptr, 2684 unsigned int *line_ptr, 2685 unsigned int *disriminator_ptr) 2686{ 2687 /* Run down the file looking for the filename, function and linenumber. */ 2688 asymbol **p; 2689 const char *directory_name = NULL; 2690 const char *main_file_name = NULL; 2691 const char *current_file_name = NULL; 2692 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2693 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2694 bfd_vma low_line_vma = 0; 2695 bfd_vma low_func_vma = 0; 2696 asymbol *func = 0; 2697 bfd_size_type filelen, funclen; 2698 char *buf; 2699 2700 *filename_ptr = abfd->filename; 2701 *functionname_ptr = NULL; 2702 *line_ptr = 0; 2703 if (disriminator_ptr) 2704 *disriminator_ptr = 0; 2705 2706 if (symbols != NULL) 2707 { 2708 for (p = symbols; *p; p++) 2709 { 2710 aout_symbol_type *q = (aout_symbol_type *) (*p); 2711 next: 2712 switch (q->type) 2713 { 2714 case N_TEXT: 2715 /* If this looks like a file name symbol, and it comes after 2716 the line number we have found so far, but before the 2717 offset, then we have probably not found the right line 2718 number. */ 2719 if (q->symbol.value <= offset 2720 && ((q->symbol.value > low_line_vma 2721 && (line_file_name != NULL 2722 || *line_ptr != 0)) 2723 || (q->symbol.value > low_func_vma 2724 && func != NULL))) 2725 { 2726 const char *symname; 2727 2728 symname = q->symbol.name; 2729 2730 if (symname != NULL 2731 && strlen (symname) > 2 2732 && strcmp (symname + strlen (symname) - 2, ".o") == 0) 2733 { 2734 if (q->symbol.value > low_line_vma) 2735 { 2736 *line_ptr = 0; 2737 line_file_name = NULL; 2738 } 2739 if (q->symbol.value > low_func_vma) 2740 func = NULL; 2741 } 2742 } 2743 break; 2744 2745 case N_SO: 2746 /* If this symbol is less than the offset, but greater than 2747 the line number we have found so far, then we have not 2748 found the right line number. */ 2749 if (q->symbol.value <= offset) 2750 { 2751 if (q->symbol.value > low_line_vma) 2752 { 2753 *line_ptr = 0; 2754 line_file_name = NULL; 2755 } 2756 if (q->symbol.value > low_func_vma) 2757 func = NULL; 2758 } 2759 2760 main_file_name = current_file_name = q->symbol.name; 2761 /* Look ahead to next symbol to check if that too is an N_SO. */ 2762 p++; 2763 if (*p == NULL) 2764 goto done; 2765 q = (aout_symbol_type *) (*p); 2766 if (q->type != (int)N_SO) 2767 goto next; 2768 2769 /* Found a second N_SO First is directory; second is filename. */ 2770 directory_name = current_file_name; 2771 main_file_name = current_file_name = q->symbol.name; 2772 if (obj_textsec (abfd) != section) 2773 goto done; 2774 break; 2775 case N_SOL: 2776 current_file_name = q->symbol.name; 2777 break; 2778 2779 case N_SLINE: 2780 2781 case N_DSLINE: 2782 case N_BSLINE: 2783 /* We'll keep this if it resolves nearer than the one we have 2784 already. */ 2785 if (q->symbol.value >= low_line_vma 2786 && q->symbol.value <= offset) 2787 { 2788 *line_ptr = q->desc; 2789 low_line_vma = q->symbol.value; 2790 line_file_name = current_file_name; 2791 line_directory_name = directory_name; 2792 } 2793 break; 2794 case N_FUN: 2795 { 2796 /* We'll keep this if it is nearer than the one we have already. */ 2797 if (q->symbol.value >= low_func_vma 2798 && q->symbol.value <= offset) 2799 { 2800 low_func_vma = q->symbol.value; 2801 func = (asymbol *)q; 2802 } 2803 else if (q->symbol.value > offset) 2804 goto done; 2805 } 2806 break; 2807 } 2808 } 2809 } 2810 2811 done: 2812 if (*line_ptr != 0) 2813 { 2814 main_file_name = line_file_name; 2815 directory_name = line_directory_name; 2816 } 2817 2818 if (main_file_name == NULL 2819 || IS_ABSOLUTE_PATH (main_file_name) 2820 || directory_name == NULL) 2821 filelen = 0; 2822 else 2823 filelen = strlen (directory_name) + strlen (main_file_name); 2824 2825 if (func == NULL) 2826 funclen = 0; 2827 else 2828 funclen = strlen (bfd_asymbol_name (func)); 2829 2830 if (adata (abfd).line_buf != NULL) 2831 free (adata (abfd).line_buf); 2832 2833 if (filelen + funclen == 0) 2834 adata (abfd).line_buf = buf = NULL; 2835 else 2836 { 2837 buf = (char *) bfd_malloc (filelen + funclen + 3); 2838 adata (abfd).line_buf = buf; 2839 if (buf == NULL) 2840 return FALSE; 2841 } 2842 2843 if (main_file_name != NULL) 2844 { 2845 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2846 *filename_ptr = main_file_name; 2847 else 2848 { 2849 if (buf == NULL) 2850 /* PR binutils/20891: In a corrupt input file both 2851 main_file_name and directory_name can be empty... */ 2852 * filename_ptr = NULL; 2853 else 2854 { 2855 snprintf (buf, filelen + 1, "%s%s", directory_name, 2856 main_file_name); 2857 *filename_ptr = buf; 2858 buf += filelen + 1; 2859 } 2860 } 2861 } 2862 2863 if (func) 2864 { 2865 const char *function = func->name; 2866 char *colon; 2867 2868 if (buf == NULL) 2869 { 2870 /* PR binutils/20892: In a corrupt input file func can be empty. */ 2871 * functionname_ptr = NULL; 2872 return TRUE; 2873 } 2874 /* The caller expects a symbol name. We actually have a 2875 function name, without the leading underscore. Put the 2876 underscore back in, so that the caller gets a symbol name. */ 2877 if (bfd_get_symbol_leading_char (abfd) == '\0') 2878 strcpy (buf, function); 2879 else 2880 { 2881 buf[0] = bfd_get_symbol_leading_char (abfd); 2882 strcpy (buf + 1, function); 2883 } 2884 /* Have to remove : stuff. */ 2885 colon = strchr (buf, ':'); 2886 if (colon != NULL) 2887 *colon = '\0'; 2888 *functionname_ptr = buf; 2889 } 2890 2891 return TRUE; 2892} 2893 2894int 2895NAME (aout, sizeof_headers) (bfd *abfd, 2896 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2897{ 2898 return adata (abfd).exec_bytes_size; 2899} 2900 2901/* Free all information we have cached for this BFD. We can always 2902 read it again later if we need it. */ 2903 2904bfd_boolean 2905NAME (aout, bfd_free_cached_info) (bfd *abfd) 2906{ 2907 asection *o; 2908 2909 if (bfd_get_format (abfd) != bfd_object 2910 || abfd->tdata.aout_data == NULL) 2911 return TRUE; 2912 2913#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2914 BFCI_FREE (obj_aout_symbols (abfd)); 2915#ifdef USE_MMAP 2916 obj_aout_external_syms (abfd) = 0; 2917 bfd_free_window (&obj_aout_sym_window (abfd)); 2918 bfd_free_window (&obj_aout_string_window (abfd)); 2919 obj_aout_external_strings (abfd) = 0; 2920#else 2921 BFCI_FREE (obj_aout_external_syms (abfd)); 2922 BFCI_FREE (obj_aout_external_strings (abfd)); 2923#endif 2924 for (o = abfd->sections; o != NULL; o = o->next) 2925 BFCI_FREE (o->relocation); 2926#undef BFCI_FREE 2927 2928 return TRUE; 2929} 2930 2931/* a.out link code. */ 2932 2933/* Routine to create an entry in an a.out link hash table. */ 2934 2935struct bfd_hash_entry * 2936NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, 2937 struct bfd_hash_table *table, 2938 const char *string) 2939{ 2940 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2941 2942 /* Allocate the structure if it has not already been allocated by a 2943 subclass. */ 2944 if (ret == NULL) 2945 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table, 2946 sizeof (* ret)); 2947 if (ret == NULL) 2948 return NULL; 2949 2950 /* Call the allocation method of the superclass. */ 2951 ret = ((struct aout_link_hash_entry *) 2952 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2953 table, string)); 2954 if (ret) 2955 { 2956 /* Set local fields. */ 2957 ret->written = FALSE; 2958 ret->indx = -1; 2959 } 2960 2961 return (struct bfd_hash_entry *) ret; 2962} 2963 2964/* Initialize an a.out link hash table. */ 2965 2966bfd_boolean 2967NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, 2968 bfd *abfd, 2969 struct bfd_hash_entry *(*newfunc) 2970 (struct bfd_hash_entry *, struct bfd_hash_table *, 2971 const char *), 2972 unsigned int entsize) 2973{ 2974 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); 2975} 2976 2977/* Create an a.out link hash table. */ 2978 2979struct bfd_link_hash_table * 2980NAME (aout, link_hash_table_create) (bfd *abfd) 2981{ 2982 struct aout_link_hash_table *ret; 2983 bfd_size_type amt = sizeof (* ret); 2984 2985 ret = (struct aout_link_hash_table *) bfd_malloc (amt); 2986 if (ret == NULL) 2987 return NULL; 2988 2989 if (!NAME (aout, link_hash_table_init) (ret, abfd, 2990 NAME (aout, link_hash_newfunc), 2991 sizeof (struct aout_link_hash_entry))) 2992 { 2993 free (ret); 2994 return NULL; 2995 } 2996 return &ret->root; 2997} 2998 2999/* Add all symbols from an object file to the hash table. */ 3000 3001static bfd_boolean 3002aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) 3003{ 3004 bfd_boolean (*add_one_symbol) 3005 (struct bfd_link_info *, bfd *, const char *, flagword, asection *, 3006 bfd_vma, const char *, bfd_boolean, bfd_boolean, 3007 struct bfd_link_hash_entry **); 3008 struct external_nlist *syms; 3009 bfd_size_type sym_count; 3010 char *strings; 3011 bfd_boolean copy; 3012 struct aout_link_hash_entry **sym_hash; 3013 struct external_nlist *p; 3014 struct external_nlist *pend; 3015 bfd_size_type amt; 3016 3017 syms = obj_aout_external_syms (abfd); 3018 sym_count = obj_aout_external_sym_count (abfd); 3019 strings = obj_aout_external_strings (abfd); 3020 if (info->keep_memory) 3021 copy = FALSE; 3022 else 3023 copy = TRUE; 3024 3025 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 3026 { 3027 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 3028 (abfd, info, &syms, &sym_count, &strings))) 3029 return FALSE; 3030 } 3031 3032 if (sym_count == 0) 3033 return TRUE; /* Nothing to do. */ 3034 3035 /* We keep a list of the linker hash table entries that correspond 3036 to particular symbols. We could just look them up in the hash 3037 table, but keeping the list is more efficient. Perhaps this 3038 should be conditional on info->keep_memory. */ 3039 amt = sym_count * sizeof (struct aout_link_hash_entry *); 3040 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt); 3041 if (sym_hash == NULL) 3042 return FALSE; 3043 obj_aout_sym_hashes (abfd) = sym_hash; 3044 3045 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 3046 if (add_one_symbol == NULL) 3047 add_one_symbol = _bfd_generic_link_add_one_symbol; 3048 3049 p = syms; 3050 pend = p + sym_count; 3051 for (; p < pend; p++, sym_hash++) 3052 { 3053 int type; 3054 const char *name; 3055 bfd_vma value; 3056 asection *section; 3057 flagword flags; 3058 const char *string; 3059 3060 *sym_hash = NULL; 3061 3062 type = H_GET_8 (abfd, p->e_type); 3063 3064 /* Ignore debugging symbols. */ 3065 if ((type & N_STAB) != 0) 3066 continue; 3067 3068 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3069 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3070 return FALSE; 3071 name = strings + GET_WORD (abfd, p->e_strx); 3072 value = GET_WORD (abfd, p->e_value); 3073 flags = BSF_GLOBAL; 3074 string = NULL; 3075 switch (type) 3076 { 3077 default: 3078 abort (); 3079 3080 case N_UNDF: 3081 case N_ABS: 3082 case N_TEXT: 3083 case N_DATA: 3084 case N_BSS: 3085 case N_FN_SEQ: 3086 case N_COMM: 3087 case N_SETV: 3088 case N_FN: 3089 /* Ignore symbols that are not externally visible. */ 3090 continue; 3091 case N_INDR: 3092 /* Ignore local indirect symbol. */ 3093 ++p; 3094 ++sym_hash; 3095 continue; 3096 3097 case N_UNDF | N_EXT: 3098 if (value == 0) 3099 { 3100 section = bfd_und_section_ptr; 3101 flags = 0; 3102 } 3103 else 3104 section = bfd_com_section_ptr; 3105 break; 3106 case N_ABS | N_EXT: 3107 section = bfd_abs_section_ptr; 3108 break; 3109 case N_TEXT | N_EXT: 3110 section = obj_textsec (abfd); 3111 value -= bfd_get_section_vma (abfd, section); 3112 break; 3113 case N_DATA | N_EXT: 3114 case N_SETV | N_EXT: 3115 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3116 translate_from_native_sym_flags. */ 3117 section = obj_datasec (abfd); 3118 value -= bfd_get_section_vma (abfd, section); 3119 break; 3120 case N_BSS | N_EXT: 3121 section = obj_bsssec (abfd); 3122 value -= bfd_get_section_vma (abfd, section); 3123 break; 3124 case N_INDR | N_EXT: 3125 /* An indirect symbol. The next symbol is the symbol 3126 which this one really is. */ 3127 /* See PR 20925 for a reproducer. */ 3128 if (p + 1 >= pend) 3129 return FALSE; 3130 ++p; 3131 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3132 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3133 return FALSE; 3134 string = strings + GET_WORD (abfd, p->e_strx); 3135 section = bfd_ind_section_ptr; 3136 flags |= BSF_INDIRECT; 3137 break; 3138 case N_COMM | N_EXT: 3139 section = bfd_com_section_ptr; 3140 break; 3141 case N_SETA: case N_SETA | N_EXT: 3142 section = bfd_abs_section_ptr; 3143 flags |= BSF_CONSTRUCTOR; 3144 break; 3145 case N_SETT: case N_SETT | N_EXT: 3146 section = obj_textsec (abfd); 3147 flags |= BSF_CONSTRUCTOR; 3148 value -= bfd_get_section_vma (abfd, section); 3149 break; 3150 case N_SETD: case N_SETD | N_EXT: 3151 section = obj_datasec (abfd); 3152 flags |= BSF_CONSTRUCTOR; 3153 value -= bfd_get_section_vma (abfd, section); 3154 break; 3155 case N_SETB: case N_SETB | N_EXT: 3156 section = obj_bsssec (abfd); 3157 flags |= BSF_CONSTRUCTOR; 3158 value -= bfd_get_section_vma (abfd, section); 3159 break; 3160 case N_WARNING: 3161 /* A warning symbol. The next symbol is the one to warn 3162 about. If there is no next symbol, just look away. */ 3163 if (p + 1 >= pend) 3164 return TRUE; 3165 ++p; 3166 string = name; 3167 /* PR 19629: Corrupt binaries can contain illegal string offsets. */ 3168 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd)) 3169 return FALSE; 3170 name = strings + GET_WORD (abfd, p->e_strx); 3171 section = bfd_und_section_ptr; 3172 flags |= BSF_WARNING; 3173 break; 3174 case N_WEAKU: 3175 section = bfd_und_section_ptr; 3176 flags = BSF_WEAK; 3177 break; 3178 case N_WEAKA: 3179 section = bfd_abs_section_ptr; 3180 flags = BSF_WEAK; 3181 break; 3182 case N_WEAKT: 3183 section = obj_textsec (abfd); 3184 value -= bfd_get_section_vma (abfd, section); 3185 flags = BSF_WEAK; 3186 break; 3187 case N_WEAKD: 3188 section = obj_datasec (abfd); 3189 value -= bfd_get_section_vma (abfd, section); 3190 flags = BSF_WEAK; 3191 break; 3192 case N_WEAKB: 3193 section = obj_bsssec (abfd); 3194 value -= bfd_get_section_vma (abfd, section); 3195 flags = BSF_WEAK; 3196 break; 3197 } 3198 3199 if (! ((*add_one_symbol) 3200 (info, abfd, name, flags, section, value, string, copy, FALSE, 3201 (struct bfd_link_hash_entry **) sym_hash))) 3202 return FALSE; 3203 3204 /* Restrict the maximum alignment of a common symbol based on 3205 the architecture, since a.out has no way to represent 3206 alignment requirements of a section in a .o file. FIXME: 3207 This isn't quite right: it should use the architecture of the 3208 output file, not the input files. */ 3209 if ((*sym_hash)->root.type == bfd_link_hash_common 3210 && ((*sym_hash)->root.u.c.p->alignment_power > 3211 bfd_get_arch_info (abfd)->section_align_power)) 3212 (*sym_hash)->root.u.c.p->alignment_power = 3213 bfd_get_arch_info (abfd)->section_align_power; 3214 3215 /* If this is a set symbol, and we are not building sets, then 3216 it is possible for the hash entry to not have been set. In 3217 such a case, treat the symbol as not globally defined. */ 3218 if ((*sym_hash)->root.type == bfd_link_hash_new) 3219 { 3220 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3221 *sym_hash = NULL; 3222 } 3223 3224 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3225 ++sym_hash; 3226 } 3227 3228 return TRUE; 3229} 3230 3231/* Free up the internal symbols read from an a.out file. */ 3232 3233static bfd_boolean 3234aout_link_free_symbols (bfd *abfd) 3235{ 3236 if (obj_aout_external_syms (abfd) != NULL) 3237 { 3238#ifdef USE_MMAP 3239 bfd_free_window (&obj_aout_sym_window (abfd)); 3240#else 3241 free ((void *) obj_aout_external_syms (abfd)); 3242#endif 3243 obj_aout_external_syms (abfd) = NULL; 3244 } 3245 if (obj_aout_external_strings (abfd) != NULL) 3246 { 3247#ifdef USE_MMAP 3248 bfd_free_window (&obj_aout_string_window (abfd)); 3249#else 3250 free ((void *) obj_aout_external_strings (abfd)); 3251#endif 3252 obj_aout_external_strings (abfd) = NULL; 3253 } 3254 return TRUE; 3255} 3256 3257/* Add symbols from an a.out object file. */ 3258 3259static bfd_boolean 3260aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) 3261{ 3262 if (! aout_get_external_symbols (abfd)) 3263 return FALSE; 3264 if (! aout_link_add_symbols (abfd, info)) 3265 return FALSE; 3266 if (! info->keep_memory) 3267 { 3268 if (! aout_link_free_symbols (abfd)) 3269 return FALSE; 3270 } 3271 return TRUE; 3272} 3273 3274/* Look through the internal symbols to see if this object file should 3275 be included in the link. We should include this object file if it 3276 defines any symbols which are currently undefined. If this object 3277 file defines a common symbol, then we may adjust the size of the 3278 known symbol but we do not include the object file in the link 3279 (unless there is some other reason to include it). */ 3280 3281static bfd_boolean 3282aout_link_check_ar_symbols (bfd *abfd, 3283 struct bfd_link_info *info, 3284 bfd_boolean *pneeded, 3285 bfd **subsbfd) 3286{ 3287 struct external_nlist *p; 3288 struct external_nlist *pend; 3289 char *strings; 3290 3291 *pneeded = FALSE; 3292 3293 /* Look through all the symbols. */ 3294 p = obj_aout_external_syms (abfd); 3295 pend = p + obj_aout_external_sym_count (abfd); 3296 strings = obj_aout_external_strings (abfd); 3297 for (; p < pend; p++) 3298 { 3299 int type = H_GET_8 (abfd, p->e_type); 3300 const char *name; 3301 struct bfd_link_hash_entry *h; 3302 3303 /* Ignore symbols that are not externally visible. This is an 3304 optimization only, as we check the type more thoroughly 3305 below. */ 3306 if (((type & N_EXT) == 0 3307 || (type & N_STAB) != 0 3308 || type == N_FN) 3309 && type != N_WEAKA 3310 && type != N_WEAKT 3311 && type != N_WEAKD 3312 && type != N_WEAKB) 3313 { 3314 if (type == N_WARNING 3315 || type == N_INDR) 3316 ++p; 3317 continue; 3318 } 3319 3320 name = strings + GET_WORD (abfd, p->e_strx); 3321 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 3322 3323 /* We are only interested in symbols that are currently 3324 undefined or common. */ 3325 if (h == NULL 3326 || (h->type != bfd_link_hash_undefined 3327 && h->type != bfd_link_hash_common)) 3328 { 3329 if (type == (N_INDR | N_EXT)) 3330 ++p; 3331 continue; 3332 } 3333 3334 if (type == (N_TEXT | N_EXT) 3335 || type == (N_DATA | N_EXT) 3336 || type == (N_BSS | N_EXT) 3337 || type == (N_ABS | N_EXT) 3338 || type == (N_INDR | N_EXT)) 3339 { 3340 /* This object file defines this symbol. We must link it 3341 in. This is true regardless of whether the current 3342 definition of the symbol is undefined or common. 3343 3344 If the current definition is common, we have a case in 3345 which we have already seen an object file including: 3346 int a; 3347 and this object file from the archive includes: 3348 int a = 5; 3349 In such a case, whether to include this object is target 3350 dependant for backward compatibility. 3351 3352 FIXME: The SunOS 4.1.3 linker will pull in the archive 3353 element if the symbol is defined in the .data section, 3354 but not if it is defined in the .text section. That 3355 seems a bit crazy to me, and it has not been implemented 3356 yet. However, it might be correct. */ 3357 if (h->type == bfd_link_hash_common) 3358 { 3359 int skip = 0; 3360 3361 switch (info->common_skip_ar_symbols) 3362 { 3363 case bfd_link_common_skip_none: 3364 break; 3365 case bfd_link_common_skip_text: 3366 skip = (type == (N_TEXT | N_EXT)); 3367 break; 3368 case bfd_link_common_skip_data: 3369 skip = (type == (N_DATA | N_EXT)); 3370 break; 3371 case bfd_link_common_skip_all: 3372 skip = 1; 3373 break; 3374 } 3375 3376 if (skip) 3377 continue; 3378 } 3379 3380 if (!(*info->callbacks 3381 ->add_archive_element) (info, abfd, name, subsbfd)) 3382 return FALSE; 3383 *pneeded = TRUE; 3384 return TRUE; 3385 } 3386 3387 if (type == (N_UNDF | N_EXT)) 3388 { 3389 bfd_vma value; 3390 3391 value = GET_WORD (abfd, p->e_value); 3392 if (value != 0) 3393 { 3394 /* This symbol is common in the object from the archive 3395 file. */ 3396 if (h->type == bfd_link_hash_undefined) 3397 { 3398 bfd *symbfd; 3399 unsigned int power; 3400 3401 symbfd = h->u.undef.abfd; 3402 if (symbfd == NULL) 3403 { 3404 /* This symbol was created as undefined from 3405 outside BFD. We assume that we should link 3406 in the object file. This is done for the -u 3407 option in the linker. */ 3408 if (!(*info->callbacks 3409 ->add_archive_element) (info, abfd, name, subsbfd)) 3410 return FALSE; 3411 *pneeded = TRUE; 3412 return TRUE; 3413 } 3414 /* Turn the current link symbol into a common 3415 symbol. It is already on the undefs list. */ 3416 h->type = bfd_link_hash_common; 3417 h->u.c.p = (struct bfd_link_hash_common_entry *) 3418 bfd_hash_allocate (&info->hash->table, 3419 sizeof (struct bfd_link_hash_common_entry)); 3420 if (h->u.c.p == NULL) 3421 return FALSE; 3422 3423 h->u.c.size = value; 3424 3425 /* FIXME: This isn't quite right. The maximum 3426 alignment of a common symbol should be set by the 3427 architecture of the output file, not of the input 3428 file. */ 3429 power = bfd_log2 (value); 3430 if (power > bfd_get_arch_info (abfd)->section_align_power) 3431 power = bfd_get_arch_info (abfd)->section_align_power; 3432 h->u.c.p->alignment_power = power; 3433 3434 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3435 "COMMON"); 3436 } 3437 else 3438 { 3439 /* Adjust the size of the common symbol if 3440 necessary. */ 3441 if (value > h->u.c.size) 3442 h->u.c.size = value; 3443 } 3444 } 3445 } 3446 3447 if (type == N_WEAKA 3448 || type == N_WEAKT 3449 || type == N_WEAKD 3450 || type == N_WEAKB) 3451 { 3452 /* This symbol is weak but defined. We must pull it in if 3453 the current link symbol is undefined, but we don't want 3454 it if the current link symbol is common. */ 3455 if (h->type == bfd_link_hash_undefined) 3456 { 3457 if (!(*info->callbacks 3458 ->add_archive_element) (info, abfd, name, subsbfd)) 3459 return FALSE; 3460 *pneeded = TRUE; 3461 return TRUE; 3462 } 3463 } 3464 } 3465 3466 /* We do not need this object file. */ 3467 return TRUE; 3468} 3469/* Check a single archive element to see if we need to include it in 3470 the link. *PNEEDED is set according to whether this element is 3471 needed in the link or not. This is called from 3472 _bfd_generic_link_add_archive_symbols. */ 3473 3474static bfd_boolean 3475aout_link_check_archive_element (bfd *abfd, 3476 struct bfd_link_info *info, 3477 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED, 3478 const char *name ATTRIBUTE_UNUSED, 3479 bfd_boolean *pneeded) 3480{ 3481 bfd *oldbfd; 3482 bfd_boolean needed; 3483 3484 if (!aout_get_external_symbols (abfd)) 3485 return FALSE; 3486 3487 oldbfd = abfd; 3488 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd)) 3489 return FALSE; 3490 3491 needed = *pneeded; 3492 if (needed) 3493 { 3494 /* Potentially, the add_archive_element hook may have set a 3495 substitute BFD for us. */ 3496 if (abfd != oldbfd) 3497 { 3498 if (!info->keep_memory 3499 && !aout_link_free_symbols (oldbfd)) 3500 return FALSE; 3501 if (!aout_get_external_symbols (abfd)) 3502 return FALSE; 3503 } 3504 if (!aout_link_add_symbols (abfd, info)) 3505 return FALSE; 3506 } 3507 3508 if (!info->keep_memory || !needed) 3509 { 3510 if (!aout_link_free_symbols (abfd)) 3511 return FALSE; 3512 } 3513 3514 return TRUE; 3515} 3516 3517/* Given an a.out BFD, add symbols to the global hash table as 3518 appropriate. */ 3519 3520bfd_boolean 3521NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) 3522{ 3523 switch (bfd_get_format (abfd)) 3524 { 3525 case bfd_object: 3526 return aout_link_add_object_symbols (abfd, info); 3527 case bfd_archive: 3528 return _bfd_generic_link_add_archive_symbols 3529 (abfd, info, aout_link_check_archive_element); 3530 default: 3531 bfd_set_error (bfd_error_wrong_format); 3532 return FALSE; 3533 } 3534} 3535 3536/* A hash table used for header files with N_BINCL entries. */ 3537 3538struct aout_link_includes_table 3539{ 3540 struct bfd_hash_table root; 3541}; 3542 3543/* A linked list of totals that we have found for a particular header 3544 file. */ 3545 3546struct aout_link_includes_totals 3547{ 3548 struct aout_link_includes_totals *next; 3549 bfd_vma total; 3550}; 3551 3552/* An entry in the header file hash table. */ 3553 3554struct aout_link_includes_entry 3555{ 3556 struct bfd_hash_entry root; 3557 /* List of totals we have found for this file. */ 3558 struct aout_link_includes_totals *totals; 3559}; 3560 3561/* Look up an entry in an the header file hash table. */ 3562 3563#define aout_link_includes_lookup(table, string, create, copy) \ 3564 ((struct aout_link_includes_entry *) \ 3565 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3566 3567/* During the final link step we need to pass around a bunch of 3568 information, so we do it in an instance of this structure. */ 3569 3570struct aout_final_link_info 3571{ 3572 /* General link information. */ 3573 struct bfd_link_info *info; 3574 /* Output bfd. */ 3575 bfd *output_bfd; 3576 /* Reloc file positions. */ 3577 file_ptr treloff, dreloff; 3578 /* File position of symbols. */ 3579 file_ptr symoff; 3580 /* String table. */ 3581 struct bfd_strtab_hash *strtab; 3582 /* Header file hash table. */ 3583 struct aout_link_includes_table includes; 3584 /* A buffer large enough to hold the contents of any section. */ 3585 bfd_byte *contents; 3586 /* A buffer large enough to hold the relocs of any section. */ 3587 void * relocs; 3588 /* A buffer large enough to hold the symbol map of any input BFD. */ 3589 int *symbol_map; 3590 /* A buffer large enough to hold output symbols of any input BFD. */ 3591 struct external_nlist *output_syms; 3592}; 3593 3594/* The function to create a new entry in the header file hash table. */ 3595 3596static struct bfd_hash_entry * 3597aout_link_includes_newfunc (struct bfd_hash_entry *entry, 3598 struct bfd_hash_table *table, 3599 const char *string) 3600{ 3601 struct aout_link_includes_entry *ret = 3602 (struct aout_link_includes_entry *) entry; 3603 3604 /* Allocate the structure if it has not already been allocated by a 3605 subclass. */ 3606 if (ret == NULL) 3607 ret = (struct aout_link_includes_entry *) 3608 bfd_hash_allocate (table, sizeof (* ret)); 3609 if (ret == NULL) 3610 return NULL; 3611 3612 /* Call the allocation method of the superclass. */ 3613 ret = ((struct aout_link_includes_entry *) 3614 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3615 if (ret) 3616 { 3617 /* Set local fields. */ 3618 ret->totals = NULL; 3619 } 3620 3621 return (struct bfd_hash_entry *) ret; 3622} 3623 3624/* Write out a symbol that was not associated with an a.out input 3625 object. */ 3626 3627static bfd_boolean 3628aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data) 3629{ 3630 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh; 3631 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data; 3632 bfd *output_bfd; 3633 int type; 3634 bfd_vma val; 3635 struct external_nlist outsym; 3636 bfd_size_type indx; 3637 bfd_size_type amt; 3638 3639 if (h->root.type == bfd_link_hash_warning) 3640 { 3641 h = (struct aout_link_hash_entry *) h->root.u.i.link; 3642 if (h->root.type == bfd_link_hash_new) 3643 return TRUE; 3644 } 3645 3646 output_bfd = flaginfo->output_bfd; 3647 3648 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 3649 { 3650 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 3651 (output_bfd, flaginfo->info, h))) 3652 { 3653 /* FIXME: No way to handle errors. */ 3654 abort (); 3655 } 3656 } 3657 3658 if (h->written) 3659 return TRUE; 3660 3661 h->written = TRUE; 3662 3663 /* An indx of -2 means the symbol must be written. */ 3664 if (h->indx != -2 3665 && (flaginfo->info->strip == strip_all 3666 || (flaginfo->info->strip == strip_some 3667 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string, 3668 FALSE, FALSE) == NULL))) 3669 return TRUE; 3670 3671 switch (h->root.type) 3672 { 3673 default: 3674 case bfd_link_hash_warning: 3675 abort (); 3676 /* Avoid variable not initialized warnings. */ 3677 return TRUE; 3678 case bfd_link_hash_new: 3679 /* This can happen for set symbols when sets are not being 3680 built. */ 3681 return TRUE; 3682 case bfd_link_hash_undefined: 3683 type = N_UNDF | N_EXT; 3684 val = 0; 3685 break; 3686 case bfd_link_hash_defined: 3687 case bfd_link_hash_defweak: 3688 { 3689 asection *sec; 3690 3691 sec = h->root.u.def.section->output_section; 3692 BFD_ASSERT (bfd_is_abs_section (sec) 3693 || sec->owner == output_bfd); 3694 if (sec == obj_textsec (output_bfd)) 3695 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 3696 else if (sec == obj_datasec (output_bfd)) 3697 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 3698 else if (sec == obj_bsssec (output_bfd)) 3699 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 3700 else 3701 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 3702 type |= N_EXT; 3703 val = (h->root.u.def.value 3704 + sec->vma 3705 + h->root.u.def.section->output_offset); 3706 } 3707 break; 3708 case bfd_link_hash_common: 3709 type = N_UNDF | N_EXT; 3710 val = h->root.u.c.size; 3711 break; 3712 case bfd_link_hash_undefweak: 3713 type = N_WEAKU; 3714 val = 0; 3715 break; 3716 case bfd_link_hash_indirect: 3717 /* We ignore these symbols, since the indirected symbol is 3718 already in the hash table. */ 3719 return TRUE; 3720 } 3721 3722 H_PUT_8 (output_bfd, type, outsym.e_type); 3723 H_PUT_8 (output_bfd, 0, outsym.e_other); 3724 H_PUT_16 (output_bfd, 0, outsym.e_desc); 3725 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string, 3726 FALSE); 3727 if (indx == - (bfd_size_type) 1) 3728 /* FIXME: No way to handle errors. */ 3729 abort (); 3730 3731 PUT_WORD (output_bfd, indx, outsym.e_strx); 3732 PUT_WORD (output_bfd, val, outsym.e_value); 3733 3734 amt = EXTERNAL_NLIST_SIZE; 3735 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0 3736 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) 3737 /* FIXME: No way to handle errors. */ 3738 abort (); 3739 3740 flaginfo->symoff += EXTERNAL_NLIST_SIZE; 3741 h->indx = obj_aout_external_sym_count (output_bfd); 3742 ++obj_aout_external_sym_count (output_bfd); 3743 3744 return TRUE; 3745} 3746 3747/* Handle a link order which is supposed to generate a reloc. */ 3748 3749static bfd_boolean 3750aout_link_reloc_link_order (struct aout_final_link_info *flaginfo, 3751 asection *o, 3752 struct bfd_link_order *p) 3753{ 3754 struct bfd_link_order_reloc *pr; 3755 int r_index; 3756 int r_extern; 3757 reloc_howto_type *howto; 3758 file_ptr *reloff_ptr = NULL; 3759 struct reloc_std_external srel; 3760 struct reloc_ext_external erel; 3761 void * rel_ptr; 3762 bfd_size_type amt; 3763 3764 pr = p->u.reloc.p; 3765 3766 if (p->type == bfd_section_reloc_link_order) 3767 { 3768 r_extern = 0; 3769 if (bfd_is_abs_section (pr->u.section)) 3770 r_index = N_ABS | N_EXT; 3771 else 3772 { 3773 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd); 3774 r_index = pr->u.section->target_index; 3775 } 3776 } 3777 else 3778 { 3779 struct aout_link_hash_entry *h; 3780 3781 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 3782 r_extern = 1; 3783 h = ((struct aout_link_hash_entry *) 3784 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info, 3785 pr->u.name, FALSE, FALSE, TRUE)); 3786 if (h != NULL 3787 && h->indx >= 0) 3788 r_index = h->indx; 3789 else if (h != NULL) 3790 { 3791 /* We decided to strip this symbol, but it turns out that we 3792 can't. Note that we lose the other and desc information 3793 here. I don't think that will ever matter for a global 3794 symbol. */ 3795 h->indx = -2; 3796 h->written = FALSE; 3797 if (!aout_link_write_other_symbol (&h->root.root, flaginfo)) 3798 return FALSE; 3799 r_index = h->indx; 3800 } 3801 else 3802 { 3803 (*flaginfo->info->callbacks->unattached_reloc) 3804 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0); 3805 r_index = 0; 3806 } 3807 } 3808 3809 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc); 3810 if (howto == 0) 3811 { 3812 bfd_set_error (bfd_error_bad_value); 3813 return FALSE; 3814 } 3815 3816 if (o == obj_textsec (flaginfo->output_bfd)) 3817 reloff_ptr = &flaginfo->treloff; 3818 else if (o == obj_datasec (flaginfo->output_bfd)) 3819 reloff_ptr = &flaginfo->dreloff; 3820 else 3821 abort (); 3822 3823 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE) 3824 { 3825#ifdef MY_put_reloc 3826 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto, 3827 &srel); 3828#else 3829 { 3830 int r_pcrel; 3831 int r_baserel; 3832 int r_jmptable; 3833 int r_relative; 3834 int r_length; 3835 3836 r_pcrel = (int) howto->pc_relative; 3837 r_baserel = (howto->type & 8) != 0; 3838 r_jmptable = (howto->type & 16) != 0; 3839 r_relative = (howto->type & 32) != 0; 3840 r_length = howto->size; 3841 3842 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address); 3843 if (bfd_header_big_endian (flaginfo->output_bfd)) 3844 { 3845 srel.r_index[0] = r_index >> 16; 3846 srel.r_index[1] = r_index >> 8; 3847 srel.r_index[2] = r_index; 3848 srel.r_type[0] = 3849 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 3850 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 3851 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 3852 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 3853 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 3854 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 3855 } 3856 else 3857 { 3858 srel.r_index[2] = r_index >> 16; 3859 srel.r_index[1] = r_index >> 8; 3860 srel.r_index[0] = r_index; 3861 srel.r_type[0] = 3862 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 3863 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 3864 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 3865 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 3866 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 3867 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 3868 } 3869 } 3870#endif 3871 rel_ptr = (void *) &srel; 3872 3873 /* We have to write the addend into the object file, since 3874 standard a.out relocs are in place. It would be more 3875 reliable if we had the current contents of the file here, 3876 rather than assuming zeroes, but we can't read the file since 3877 it was opened using bfd_openw. */ 3878 if (pr->addend != 0) 3879 { 3880 bfd_size_type size; 3881 bfd_reloc_status_type r; 3882 bfd_byte *buf; 3883 bfd_boolean ok; 3884 3885 size = bfd_get_reloc_size (howto); 3886 buf = (bfd_byte *) bfd_zmalloc (size); 3887 if (buf == NULL && size != 0) 3888 return FALSE; 3889 r = MY_relocate_contents (howto, flaginfo->output_bfd, 3890 (bfd_vma) pr->addend, buf); 3891 switch (r) 3892 { 3893 case bfd_reloc_ok: 3894 break; 3895 default: 3896 case bfd_reloc_outofrange: 3897 abort (); 3898 case bfd_reloc_overflow: 3899 (*flaginfo->info->callbacks->reloc_overflow) 3900 (flaginfo->info, NULL, 3901 (p->type == bfd_section_reloc_link_order 3902 ? bfd_section_name (flaginfo->output_bfd, 3903 pr->u.section) 3904 : pr->u.name), 3905 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0); 3906 break; 3907 } 3908 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf, 3909 (file_ptr) p->offset, size); 3910 free (buf); 3911 if (! ok) 3912 return FALSE; 3913 } 3914 } 3915 else 3916 { 3917#ifdef MY_put_ext_reloc 3918 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, 3919 howto, &erel, pr->addend); 3920#else 3921 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address); 3922 3923 if (bfd_header_big_endian (flaginfo->output_bfd)) 3924 { 3925 erel.r_index[0] = r_index >> 16; 3926 erel.r_index[1] = r_index >> 8; 3927 erel.r_index[2] = r_index; 3928 erel.r_type[0] = 3929 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 3930 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 3931 } 3932 else 3933 { 3934 erel.r_index[2] = r_index >> 16; 3935 erel.r_index[1] = r_index >> 8; 3936 erel.r_index[0] = r_index; 3937 erel.r_type[0] = 3938 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 3939 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 3940 } 3941 3942 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 3943#endif /* MY_put_ext_reloc */ 3944 3945 rel_ptr = (void *) &erel; 3946 } 3947 3948 amt = obj_reloc_entry_size (flaginfo->output_bfd); 3949 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 3950 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt) 3951 return FALSE; 3952 3953 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd); 3954 3955 /* Assert that the relocs have not run into the symbols, and that n 3956 the text relocs have not run into the data relocs. */ 3957 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 3958 && (reloff_ptr != &flaginfo->treloff 3959 || (*reloff_ptr 3960 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 3961 3962 return TRUE; 3963} 3964 3965/* Get the section corresponding to a reloc index. */ 3966 3967static INLINE asection * 3968aout_reloc_index_to_section (bfd *abfd, int indx) 3969{ 3970 switch (indx & N_TYPE) 3971 { 3972 case N_TEXT: return obj_textsec (abfd); 3973 case N_DATA: return obj_datasec (abfd); 3974 case N_BSS: return obj_bsssec (abfd); 3975 case N_ABS: 3976 case N_UNDF: return bfd_abs_section_ptr; 3977 default: abort (); 3978 } 3979 return NULL; 3980} 3981 3982/* Relocate an a.out section using standard a.out relocs. */ 3983 3984static bfd_boolean 3985aout_link_input_section_std (struct aout_final_link_info *flaginfo, 3986 bfd *input_bfd, 3987 asection *input_section, 3988 struct reloc_std_external *relocs, 3989 bfd_size_type rel_size, 3990 bfd_byte *contents) 3991{ 3992 bfd_boolean (*check_dynamic_reloc) 3993 (struct bfd_link_info *, bfd *, asection *, 3994 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 3995 bfd_vma *); 3996 bfd *output_bfd; 3997 bfd_boolean relocatable; 3998 struct external_nlist *syms; 3999 char *strings; 4000 struct aout_link_hash_entry **sym_hashes; 4001 int *symbol_map; 4002 bfd_size_type reloc_count; 4003 struct reloc_std_external *rel; 4004 struct reloc_std_external *rel_end; 4005 4006 output_bfd = flaginfo->output_bfd; 4007 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4008 4009 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 4010 BFD_ASSERT (input_bfd->xvec->header_byteorder 4011 == output_bfd->xvec->header_byteorder); 4012 4013 relocatable = bfd_link_relocatable (flaginfo->info); 4014 syms = obj_aout_external_syms (input_bfd); 4015 strings = obj_aout_external_strings (input_bfd); 4016 sym_hashes = obj_aout_sym_hashes (input_bfd); 4017 symbol_map = flaginfo->symbol_map; 4018 4019 reloc_count = rel_size / RELOC_STD_SIZE; 4020 rel = relocs; 4021 rel_end = rel + reloc_count; 4022 for (; rel < rel_end; rel++) 4023 { 4024 bfd_vma r_addr; 4025 int r_index; 4026 int r_extern; 4027 int r_pcrel; 4028 int r_baserel = 0; 4029 reloc_howto_type *howto; 4030 struct aout_link_hash_entry *h = NULL; 4031 bfd_vma relocation; 4032 bfd_reloc_status_type r; 4033 4034 r_addr = GET_SWORD (input_bfd, rel->r_address); 4035 4036#ifdef MY_reloc_howto 4037 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 4038#else 4039 { 4040 int r_jmptable; 4041 int r_relative; 4042 int r_length; 4043 unsigned int howto_idx; 4044 4045 if (bfd_header_big_endian (input_bfd)) 4046 { 4047 r_index = (((unsigned int) rel->r_index[0] << 16) 4048 | ((unsigned int) rel->r_index[1] << 8) 4049 | rel->r_index[2]); 4050 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 4051 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 4052 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 4053 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 4054 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 4055 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 4056 >> RELOC_STD_BITS_LENGTH_SH_BIG); 4057 } 4058 else 4059 { 4060 r_index = (((unsigned int) rel->r_index[2] << 16) 4061 | ((unsigned int) rel->r_index[1] << 8) 4062 | rel->r_index[0]); 4063 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 4064 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 4065 r_baserel = (0 != (rel->r_type[0] 4066 & RELOC_STD_BITS_BASEREL_LITTLE)); 4067 r_jmptable= (0 != (rel->r_type[0] 4068 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 4069 r_relative= (0 != (rel->r_type[0] 4070 & RELOC_STD_BITS_RELATIVE_LITTLE)); 4071 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 4072 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 4073 } 4074 4075 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 4076 + 16 * r_jmptable + 32 * r_relative); 4077 if (howto_idx < TABLE_SIZE (howto_table_std)) 4078 howto = howto_table_std + howto_idx; 4079 else 4080 howto = NULL; 4081 } 4082#endif 4083 4084 if (howto == NULL) 4085 { 4086 _bfd_error_handler (_("%pB: unsupported relocation type"), 4087 input_bfd); 4088 bfd_set_error (bfd_error_bad_value); 4089 return FALSE; 4090 } 4091 4092 if (relocatable) 4093 { 4094 /* We are generating a relocatable output file, and must 4095 modify the reloc accordingly. */ 4096 if (r_extern) 4097 { 4098 /* If we know the symbol this relocation is against, 4099 convert it into a relocation against a section. This 4100 is what the native linker does. */ 4101 h = sym_hashes[r_index]; 4102 if (h != NULL 4103 && (h->root.type == bfd_link_hash_defined 4104 || h->root.type == bfd_link_hash_defweak)) 4105 { 4106 asection *output_section; 4107 4108 /* Change the r_extern value. */ 4109 if (bfd_header_big_endian (output_bfd)) 4110 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4111 else 4112 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4113 4114 /* Compute a new r_index. */ 4115 output_section = h->root.u.def.section->output_section; 4116 if (output_section == obj_textsec (output_bfd)) 4117 r_index = N_TEXT; 4118 else if (output_section == obj_datasec (output_bfd)) 4119 r_index = N_DATA; 4120 else if (output_section == obj_bsssec (output_bfd)) 4121 r_index = N_BSS; 4122 else 4123 r_index = N_ABS; 4124 4125 /* Add the symbol value and the section VMA to the 4126 addend stored in the contents. */ 4127 relocation = (h->root.u.def.value 4128 + output_section->vma 4129 + h->root.u.def.section->output_offset); 4130 } 4131 else 4132 { 4133 /* We must change r_index according to the symbol 4134 map. */ 4135 r_index = symbol_map[r_index]; 4136 4137 if (r_index == -1) 4138 { 4139 if (h != NULL) 4140 { 4141 /* We decided to strip this symbol, but it 4142 turns out that we can't. Note that we 4143 lose the other and desc information here. 4144 I don't think that will ever matter for a 4145 global symbol. */ 4146 if (h->indx < 0) 4147 { 4148 h->indx = -2; 4149 h->written = FALSE; 4150 if (!aout_link_write_other_symbol (&h->root.root, 4151 flaginfo)) 4152 return FALSE; 4153 } 4154 r_index = h->indx; 4155 } 4156 else 4157 { 4158 const char *name; 4159 4160 name = strings + GET_WORD (input_bfd, 4161 syms[r_index].e_strx); 4162 (*flaginfo->info->callbacks->unattached_reloc) 4163 (flaginfo->info, name, 4164 input_bfd, input_section, r_addr); 4165 r_index = 0; 4166 } 4167 } 4168 4169 relocation = 0; 4170 } 4171 4172 /* Write out the new r_index value. */ 4173 if (bfd_header_big_endian (output_bfd)) 4174 { 4175 rel->r_index[0] = r_index >> 16; 4176 rel->r_index[1] = r_index >> 8; 4177 rel->r_index[2] = r_index; 4178 } 4179 else 4180 { 4181 rel->r_index[2] = r_index >> 16; 4182 rel->r_index[1] = r_index >> 8; 4183 rel->r_index[0] = r_index; 4184 } 4185 } 4186 else 4187 { 4188 asection *section; 4189 4190 /* This is a relocation against a section. We must 4191 adjust by the amount that the section moved. */ 4192 section = aout_reloc_index_to_section (input_bfd, r_index); 4193 relocation = (section->output_section->vma 4194 + section->output_offset 4195 - section->vma); 4196 } 4197 4198 /* Change the address of the relocation. */ 4199 PUT_WORD (output_bfd, 4200 r_addr + input_section->output_offset, 4201 rel->r_address); 4202 4203 /* Adjust a PC relative relocation by removing the reference 4204 to the original address in the section and including the 4205 reference to the new address. */ 4206 if (r_pcrel) 4207 relocation -= (input_section->output_section->vma 4208 + input_section->output_offset 4209 - input_section->vma); 4210 4211#ifdef MY_relocatable_reloc 4212 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4213#endif 4214 4215 if (relocation == 0) 4216 r = bfd_reloc_ok; 4217 else 4218 r = MY_relocate_contents (howto, 4219 input_bfd, relocation, 4220 contents + r_addr); 4221 } 4222 else 4223 { 4224 bfd_boolean hundef; 4225 4226 /* We are generating an executable, and must do a full 4227 relocation. */ 4228 hundef = FALSE; 4229 4230 if (r_extern) 4231 { 4232 h = sym_hashes[r_index]; 4233 4234 if (h != NULL 4235 && (h->root.type == bfd_link_hash_defined 4236 || h->root.type == bfd_link_hash_defweak)) 4237 { 4238 relocation = (h->root.u.def.value 4239 + h->root.u.def.section->output_section->vma 4240 + h->root.u.def.section->output_offset); 4241 } 4242 else if (h != NULL 4243 && h->root.type == bfd_link_hash_undefweak) 4244 relocation = 0; 4245 else 4246 { 4247 hundef = TRUE; 4248 relocation = 0; 4249 } 4250 } 4251 else 4252 { 4253 asection *section; 4254 4255 section = aout_reloc_index_to_section (input_bfd, r_index); 4256 relocation = (section->output_section->vma 4257 + section->output_offset 4258 - section->vma); 4259 if (r_pcrel) 4260 relocation += input_section->vma; 4261 } 4262 4263 if (check_dynamic_reloc != NULL) 4264 { 4265 bfd_boolean skip; 4266 4267 if (! ((*check_dynamic_reloc) 4268 (flaginfo->info, input_bfd, input_section, h, 4269 (void *) rel, contents, &skip, &relocation))) 4270 return FALSE; 4271 if (skip) 4272 continue; 4273 } 4274 4275 /* Now warn if a global symbol is undefined. We could not 4276 do this earlier, because check_dynamic_reloc might want 4277 to skip this reloc. */ 4278 if (hundef && ! bfd_link_pic (flaginfo->info) && ! r_baserel) 4279 { 4280 const char *name; 4281 4282 if (h != NULL) 4283 name = h->root.root.string; 4284 else 4285 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4286 (*flaginfo->info->callbacks->undefined_symbol) 4287 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE); 4288 } 4289 4290 r = MY_final_link_relocate (howto, 4291 input_bfd, input_section, 4292 contents, r_addr, relocation, 4293 (bfd_vma) 0); 4294 } 4295 4296 if (r != bfd_reloc_ok) 4297 { 4298 switch (r) 4299 { 4300 default: 4301 case bfd_reloc_outofrange: 4302 abort (); 4303 case bfd_reloc_overflow: 4304 { 4305 const char *name; 4306 4307 if (h != NULL) 4308 name = NULL; 4309 else if (r_extern) 4310 name = strings + GET_WORD (input_bfd, 4311 syms[r_index].e_strx); 4312 else 4313 { 4314 asection *s; 4315 4316 s = aout_reloc_index_to_section (input_bfd, r_index); 4317 name = bfd_section_name (input_bfd, s); 4318 } 4319 (*flaginfo->info->callbacks->reloc_overflow) 4320 (flaginfo->info, (h ? &h->root : NULL), name, howto->name, 4321 (bfd_vma) 0, input_bfd, input_section, r_addr); 4322 } 4323 break; 4324 } 4325 } 4326 } 4327 4328 return TRUE; 4329} 4330 4331/* Relocate an a.out section using extended a.out relocs. */ 4332 4333static bfd_boolean 4334aout_link_input_section_ext (struct aout_final_link_info *flaginfo, 4335 bfd *input_bfd, 4336 asection *input_section, 4337 struct reloc_ext_external *relocs, 4338 bfd_size_type rel_size, 4339 bfd_byte *contents) 4340{ 4341 bfd_boolean (*check_dynamic_reloc) 4342 (struct bfd_link_info *, bfd *, asection *, 4343 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 4344 bfd_vma *); 4345 bfd *output_bfd; 4346 bfd_boolean relocatable; 4347 struct external_nlist *syms; 4348 char *strings; 4349 struct aout_link_hash_entry **sym_hashes; 4350 int *symbol_map; 4351 bfd_size_type reloc_count; 4352 struct reloc_ext_external *rel; 4353 struct reloc_ext_external *rel_end; 4354 4355 output_bfd = flaginfo->output_bfd; 4356 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4357 4358 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 4359 BFD_ASSERT (input_bfd->xvec->header_byteorder 4360 == output_bfd->xvec->header_byteorder); 4361 4362 relocatable = bfd_link_relocatable (flaginfo->info); 4363 syms = obj_aout_external_syms (input_bfd); 4364 strings = obj_aout_external_strings (input_bfd); 4365 sym_hashes = obj_aout_sym_hashes (input_bfd); 4366 symbol_map = flaginfo->symbol_map; 4367 4368 reloc_count = rel_size / RELOC_EXT_SIZE; 4369 rel = relocs; 4370 rel_end = rel + reloc_count; 4371 for (; rel < rel_end; rel++) 4372 { 4373 bfd_vma r_addr; 4374 int r_index; 4375 int r_extern; 4376 unsigned int r_type; 4377 bfd_vma r_addend; 4378 struct aout_link_hash_entry *h = NULL; 4379 asection *r_section = NULL; 4380 bfd_vma relocation; 4381 4382 r_addr = GET_SWORD (input_bfd, rel->r_address); 4383 4384 if (bfd_header_big_endian (input_bfd)) 4385 { 4386 r_index = (((unsigned int) rel->r_index[0] << 16) 4387 | ((unsigned int) rel->r_index[1] << 8) 4388 | rel->r_index[2]); 4389 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 4390 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 4391 >> RELOC_EXT_BITS_TYPE_SH_BIG); 4392 } 4393 else 4394 { 4395 r_index = (((unsigned int) rel->r_index[2] << 16) 4396 | ((unsigned int) rel->r_index[1] << 8) 4397 | rel->r_index[0]); 4398 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 4399 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 4400 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 4401 } 4402 4403 r_addend = GET_SWORD (input_bfd, rel->r_addend); 4404 4405 if (r_type >= TABLE_SIZE (howto_table_ext)) 4406 { 4407 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 4408 input_bfd, r_type); 4409 bfd_set_error (bfd_error_bad_value); 4410 return FALSE; 4411 } 4412 4413 if (relocatable) 4414 { 4415 /* We are generating a relocatable output file, and must 4416 modify the reloc accordingly. */ 4417 if (r_extern 4418 || r_type == (unsigned int) RELOC_BASE10 4419 || r_type == (unsigned int) RELOC_BASE13 4420 || r_type == (unsigned int) RELOC_BASE22) 4421 { 4422 /* If we know the symbol this relocation is against, 4423 convert it into a relocation against a section. This 4424 is what the native linker does. */ 4425 if (r_type == (unsigned int) RELOC_BASE10 4426 || r_type == (unsigned int) RELOC_BASE13 4427 || r_type == (unsigned int) RELOC_BASE22) 4428 h = NULL; 4429 else 4430 h = sym_hashes[r_index]; 4431 if (h != NULL 4432 && (h->root.type == bfd_link_hash_defined 4433 || h->root.type == bfd_link_hash_defweak)) 4434 { 4435 asection *output_section; 4436 4437 /* Change the r_extern value. */ 4438 if (bfd_header_big_endian (output_bfd)) 4439 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 4440 else 4441 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 4442 4443 /* Compute a new r_index. */ 4444 output_section = h->root.u.def.section->output_section; 4445 if (output_section == obj_textsec (output_bfd)) 4446 r_index = N_TEXT; 4447 else if (output_section == obj_datasec (output_bfd)) 4448 r_index = N_DATA; 4449 else if (output_section == obj_bsssec (output_bfd)) 4450 r_index = N_BSS; 4451 else 4452 r_index = N_ABS; 4453 4454 /* Add the symbol value and the section VMA to the 4455 addend. */ 4456 relocation = (h->root.u.def.value 4457 + output_section->vma 4458 + h->root.u.def.section->output_offset); 4459 4460 /* Now RELOCATION is the VMA of the final 4461 destination. If this is a PC relative reloc, 4462 then ADDEND is the negative of the source VMA. 4463 We want to set ADDEND to the difference between 4464 the destination VMA and the source VMA, which 4465 means we must adjust RELOCATION by the change in 4466 the source VMA. This is done below. */ 4467 } 4468 else 4469 { 4470 /* We must change r_index according to the symbol 4471 map. */ 4472 r_index = symbol_map[r_index]; 4473 4474 if (r_index == -1) 4475 { 4476 if (h != NULL) 4477 { 4478 /* We decided to strip this symbol, but it 4479 turns out that we can't. Note that we 4480 lose the other and desc information here. 4481 I don't think that will ever matter for a 4482 global symbol. */ 4483 if (h->indx < 0) 4484 { 4485 h->indx = -2; 4486 h->written = FALSE; 4487 if (!aout_link_write_other_symbol (&h->root.root, 4488 flaginfo)) 4489 return FALSE; 4490 } 4491 r_index = h->indx; 4492 } 4493 else 4494 { 4495 const char *name; 4496 4497 name = strings + GET_WORD (input_bfd, 4498 syms[r_index].e_strx); 4499 (*flaginfo->info->callbacks->unattached_reloc) 4500 (flaginfo->info, name, 4501 input_bfd, input_section, r_addr); 4502 r_index = 0; 4503 } 4504 } 4505 4506 relocation = 0; 4507 4508 /* If this is a PC relative reloc, then the addend 4509 is the negative of the source VMA. We must 4510 adjust it by the change in the source VMA. This 4511 is done below. */ 4512 } 4513 4514 /* Write out the new r_index value. */ 4515 if (bfd_header_big_endian (output_bfd)) 4516 { 4517 rel->r_index[0] = r_index >> 16; 4518 rel->r_index[1] = r_index >> 8; 4519 rel->r_index[2] = r_index; 4520 } 4521 else 4522 { 4523 rel->r_index[2] = r_index >> 16; 4524 rel->r_index[1] = r_index >> 8; 4525 rel->r_index[0] = r_index; 4526 } 4527 } 4528 else 4529 { 4530 /* This is a relocation against a section. We must 4531 adjust by the amount that the section moved. */ 4532 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4533 relocation = (r_section->output_section->vma 4534 + r_section->output_offset 4535 - r_section->vma); 4536 4537 /* If this is a PC relative reloc, then the addend is 4538 the difference in VMA between the destination and the 4539 source. We have just adjusted for the change in VMA 4540 of the destination, so we must also adjust by the 4541 change in VMA of the source. This is done below. */ 4542 } 4543 4544 /* As described above, we must always adjust a PC relative 4545 reloc by the change in VMA of the source. However, if 4546 pcrel_offset is set, then the addend does not include the 4547 location within the section, in which case we don't need 4548 to adjust anything. */ 4549 if (howto_table_ext[r_type].pc_relative 4550 && ! howto_table_ext[r_type].pcrel_offset) 4551 relocation -= (input_section->output_section->vma 4552 + input_section->output_offset 4553 - input_section->vma); 4554 4555 /* Change the addend if necessary. */ 4556 if (relocation != 0) 4557 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 4558 4559 /* Change the address of the relocation. */ 4560 PUT_WORD (output_bfd, 4561 r_addr + input_section->output_offset, 4562 rel->r_address); 4563 } 4564 else 4565 { 4566 bfd_boolean hundef; 4567 bfd_reloc_status_type r; 4568 4569 /* We are generating an executable, and must do a full 4570 relocation. */ 4571 hundef = FALSE; 4572 4573 if (r_extern) 4574 { 4575 h = sym_hashes[r_index]; 4576 4577 if (h != NULL 4578 && (h->root.type == bfd_link_hash_defined 4579 || h->root.type == bfd_link_hash_defweak)) 4580 { 4581 relocation = (h->root.u.def.value 4582 + h->root.u.def.section->output_section->vma 4583 + h->root.u.def.section->output_offset); 4584 } 4585 else if (h != NULL 4586 && h->root.type == bfd_link_hash_undefweak) 4587 relocation = 0; 4588 else 4589 { 4590 hundef = TRUE; 4591 relocation = 0; 4592 } 4593 } 4594 else if (r_type == (unsigned int) RELOC_BASE10 4595 || r_type == (unsigned int) RELOC_BASE13 4596 || r_type == (unsigned int) RELOC_BASE22) 4597 { 4598 struct external_nlist *sym; 4599 int type; 4600 4601 /* For base relative relocs, r_index is always an index 4602 into the symbol table, even if r_extern is 0. */ 4603 sym = syms + r_index; 4604 type = H_GET_8 (input_bfd, sym->e_type); 4605 if ((type & N_TYPE) == N_TEXT 4606 || type == N_WEAKT) 4607 r_section = obj_textsec (input_bfd); 4608 else if ((type & N_TYPE) == N_DATA 4609 || type == N_WEAKD) 4610 r_section = obj_datasec (input_bfd); 4611 else if ((type & N_TYPE) == N_BSS 4612 || type == N_WEAKB) 4613 r_section = obj_bsssec (input_bfd); 4614 else if ((type & N_TYPE) == N_ABS 4615 || type == N_WEAKA) 4616 r_section = bfd_abs_section_ptr; 4617 else 4618 abort (); 4619 relocation = (r_section->output_section->vma 4620 + r_section->output_offset 4621 + (GET_WORD (input_bfd, sym->e_value) 4622 - r_section->vma)); 4623 } 4624 else 4625 { 4626 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4627 4628 /* If this is a PC relative reloc, then R_ADDEND is the 4629 difference between the two vmas, or 4630 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 4631 where 4632 old_dest_sec == section->vma 4633 and 4634 old_src_sec == input_section->vma 4635 and 4636 old_src_off == r_addr 4637 4638 _bfd_final_link_relocate expects RELOCATION + 4639 R_ADDEND to be the VMA of the destination minus 4640 r_addr (the minus r_addr is because this relocation 4641 is not pcrel_offset, which is a bit confusing and 4642 should, perhaps, be changed), or 4643 new_dest_sec 4644 where 4645 new_dest_sec == output_section->vma + output_offset 4646 We arrange for this to happen by setting RELOCATION to 4647 new_dest_sec + old_src_sec - old_dest_sec 4648 4649 If this is not a PC relative reloc, then R_ADDEND is 4650 simply the VMA of the destination, so we set 4651 RELOCATION to the change in the destination VMA, or 4652 new_dest_sec - old_dest_sec 4653 */ 4654 relocation = (r_section->output_section->vma 4655 + r_section->output_offset 4656 - r_section->vma); 4657 if (howto_table_ext[r_type].pc_relative) 4658 relocation += input_section->vma; 4659 } 4660 4661 if (check_dynamic_reloc != NULL) 4662 { 4663 bfd_boolean skip; 4664 4665 if (! ((*check_dynamic_reloc) 4666 (flaginfo->info, input_bfd, input_section, h, 4667 (void *) rel, contents, &skip, &relocation))) 4668 return FALSE; 4669 if (skip) 4670 continue; 4671 } 4672 4673 /* Now warn if a global symbol is undefined. We could not 4674 do this earlier, because check_dynamic_reloc might want 4675 to skip this reloc. */ 4676 if (hundef 4677 && ! bfd_link_pic (flaginfo->info) 4678 && r_type != (unsigned int) RELOC_BASE10 4679 && r_type != (unsigned int) RELOC_BASE13 4680 && r_type != (unsigned int) RELOC_BASE22) 4681 { 4682 const char *name; 4683 4684 if (h != NULL) 4685 name = h->root.root.string; 4686 else 4687 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4688 (*flaginfo->info->callbacks->undefined_symbol) 4689 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE); 4690 } 4691 4692 if (r_type != (unsigned int) RELOC_SPARC_REV32) 4693 r = MY_final_link_relocate (howto_table_ext + r_type, 4694 input_bfd, input_section, 4695 contents, r_addr, relocation, 4696 r_addend); 4697 else 4698 { 4699 bfd_vma x; 4700 4701 x = bfd_get_32 (input_bfd, contents + r_addr); 4702 x = x + relocation + r_addend; 4703 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 4704 r = bfd_reloc_ok; 4705 } 4706 4707 if (r != bfd_reloc_ok) 4708 { 4709 switch (r) 4710 { 4711 default: 4712 case bfd_reloc_outofrange: 4713 abort (); 4714 case bfd_reloc_overflow: 4715 { 4716 const char *name; 4717 4718 if (h != NULL) 4719 name = NULL; 4720 else if (r_extern 4721 || r_type == (unsigned int) RELOC_BASE10 4722 || r_type == (unsigned int) RELOC_BASE13 4723 || r_type == (unsigned int) RELOC_BASE22) 4724 name = strings + GET_WORD (input_bfd, 4725 syms[r_index].e_strx); 4726 else 4727 { 4728 asection *s; 4729 4730 s = aout_reloc_index_to_section (input_bfd, r_index); 4731 name = bfd_section_name (input_bfd, s); 4732 } 4733 (*flaginfo->info->callbacks->reloc_overflow) 4734 (flaginfo->info, (h ? &h->root : NULL), name, 4735 howto_table_ext[r_type].name, 4736 r_addend, input_bfd, input_section, r_addr); 4737 } 4738 break; 4739 } 4740 } 4741 } 4742 } 4743 4744 return TRUE; 4745} 4746 4747/* Link an a.out section into the output file. */ 4748 4749static bfd_boolean 4750aout_link_input_section (struct aout_final_link_info *flaginfo, 4751 bfd *input_bfd, 4752 asection *input_section, 4753 file_ptr *reloff_ptr, 4754 bfd_size_type rel_size) 4755{ 4756 bfd_size_type input_size; 4757 void * relocs; 4758 4759 /* Get the section contents. */ 4760 input_size = input_section->size; 4761 if (! bfd_get_section_contents (input_bfd, input_section, 4762 (void *) flaginfo->contents, 4763 (file_ptr) 0, input_size)) 4764 return FALSE; 4765 4766 /* Read in the relocs if we haven't already done it. */ 4767 if (aout_section_data (input_section) != NULL 4768 && aout_section_data (input_section)->relocs != NULL) 4769 relocs = aout_section_data (input_section)->relocs; 4770 else 4771 { 4772 relocs = flaginfo->relocs; 4773 if (rel_size > 0) 4774 { 4775 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4776 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4777 return FALSE; 4778 } 4779 } 4780 4781 /* Relocate the section contents. */ 4782 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4783 { 4784 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section, 4785 (struct reloc_std_external *) relocs, 4786 rel_size, flaginfo->contents)) 4787 return FALSE; 4788 } 4789 else 4790 { 4791 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section, 4792 (struct reloc_ext_external *) relocs, 4793 rel_size, flaginfo->contents)) 4794 return FALSE; 4795 } 4796 4797 /* Write out the section contents. */ 4798 if (! bfd_set_section_contents (flaginfo->output_bfd, 4799 input_section->output_section, 4800 (void *) flaginfo->contents, 4801 (file_ptr) input_section->output_offset, 4802 input_size)) 4803 return FALSE; 4804 4805 /* If we are producing relocatable output, the relocs were 4806 modified, and we now write them out. */ 4807 if (bfd_link_relocatable (flaginfo->info) && rel_size > 0) 4808 { 4809 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4810 return FALSE; 4811 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size) 4812 return FALSE; 4813 *reloff_ptr += rel_size; 4814 4815 /* Assert that the relocs have not run into the symbols, and 4816 that if these are the text relocs they have not run into the 4817 data relocs. */ 4818 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd) 4819 && (reloff_ptr != &flaginfo->treloff 4820 || (*reloff_ptr 4821 <= obj_datasec (flaginfo->output_bfd)->rel_filepos))); 4822 } 4823 4824 return TRUE; 4825} 4826 4827/* Adjust and write out the symbols for an a.out file. Set the new 4828 symbol indices into a symbol_map. */ 4829 4830static bfd_boolean 4831aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd) 4832{ 4833 bfd *output_bfd; 4834 bfd_size_type sym_count; 4835 char *strings; 4836 enum bfd_link_strip strip; 4837 enum bfd_link_discard discard; 4838 struct external_nlist *outsym; 4839 bfd_size_type strtab_index; 4840 struct external_nlist *sym; 4841 struct external_nlist *sym_end; 4842 struct aout_link_hash_entry **sym_hash; 4843 int *symbol_map; 4844 bfd_boolean pass; 4845 bfd_boolean skip_next; 4846 4847 output_bfd = flaginfo->output_bfd; 4848 sym_count = obj_aout_external_sym_count (input_bfd); 4849 strings = obj_aout_external_strings (input_bfd); 4850 strip = flaginfo->info->strip; 4851 discard = flaginfo->info->discard; 4852 outsym = flaginfo->output_syms; 4853 4854 /* First write out a symbol for this object file, unless we are 4855 discarding such symbols. */ 4856 if (strip != strip_all 4857 && (strip != strip_some 4858 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename, 4859 FALSE, FALSE) != NULL) 4860 && discard != discard_all) 4861 { 4862 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4863 H_PUT_8 (output_bfd, 0, outsym->e_other); 4864 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4865 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 4866 input_bfd->filename, FALSE); 4867 if (strtab_index == (bfd_size_type) -1) 4868 return FALSE; 4869 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4870 PUT_WORD (output_bfd, 4871 (bfd_get_section_vma (output_bfd, 4872 obj_textsec (input_bfd)->output_section) 4873 + obj_textsec (input_bfd)->output_offset), 4874 outsym->e_value); 4875 ++obj_aout_external_sym_count (output_bfd); 4876 ++outsym; 4877 } 4878 4879 pass = FALSE; 4880 skip_next = FALSE; 4881 sym = obj_aout_external_syms (input_bfd); 4882 sym_end = sym + sym_count; 4883 sym_hash = obj_aout_sym_hashes (input_bfd); 4884 symbol_map = flaginfo->symbol_map; 4885 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4886 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4887 { 4888 const char *name; 4889 int type; 4890 struct aout_link_hash_entry *h; 4891 bfd_boolean skip; 4892 asection *symsec; 4893 bfd_vma val = 0; 4894 bfd_boolean copy; 4895 4896 /* We set *symbol_map to 0 above for all symbols. If it has 4897 already been set to -1 for this symbol, it means that we are 4898 discarding it because it appears in a duplicate header file. 4899 See the N_BINCL code below. */ 4900 if (*symbol_map == -1) 4901 continue; 4902 4903 /* Initialize *symbol_map to -1, which means that the symbol was 4904 not copied into the output file. We will change it later if 4905 we do copy the symbol over. */ 4906 *symbol_map = -1; 4907 4908 type = H_GET_8 (input_bfd, sym->e_type); 4909 name = strings + GET_WORD (input_bfd, sym->e_strx); 4910 4911 h = NULL; 4912 4913 if (pass) 4914 { 4915 /* Pass this symbol through. It is the target of an 4916 indirect or warning symbol. */ 4917 val = GET_WORD (input_bfd, sym->e_value); 4918 pass = FALSE; 4919 } 4920 else if (skip_next) 4921 { 4922 /* Skip this symbol, which is the target of an indirect 4923 symbol that we have changed to no longer be an indirect 4924 symbol. */ 4925 skip_next = FALSE; 4926 continue; 4927 } 4928 else 4929 { 4930 struct aout_link_hash_entry *hresolve; 4931 4932 /* We have saved the hash table entry for this symbol, if 4933 there is one. Note that we could just look it up again 4934 in the hash table, provided we first check that it is an 4935 external symbol. */ 4936 h = *sym_hash; 4937 4938 /* Use the name from the hash table, in case the symbol was 4939 wrapped. */ 4940 if (h != NULL 4941 && h->root.type != bfd_link_hash_warning) 4942 name = h->root.root.string; 4943 4944 /* If this is an indirect or warning symbol, then change 4945 hresolve to the base symbol. We also change *sym_hash so 4946 that the relocation routines relocate against the real 4947 symbol. */ 4948 hresolve = h; 4949 if (h != (struct aout_link_hash_entry *) NULL 4950 && (h->root.type == bfd_link_hash_indirect 4951 || h->root.type == bfd_link_hash_warning)) 4952 { 4953 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4954 while (hresolve->root.type == bfd_link_hash_indirect 4955 || hresolve->root.type == bfd_link_hash_warning) 4956 hresolve = ((struct aout_link_hash_entry *) 4957 hresolve->root.u.i.link); 4958 *sym_hash = hresolve; 4959 } 4960 4961 /* If the symbol has already been written out, skip it. */ 4962 if (h != NULL 4963 && h->written) 4964 { 4965 if ((type & N_TYPE) == N_INDR 4966 || type == N_WARNING) 4967 skip_next = TRUE; 4968 *symbol_map = h->indx; 4969 continue; 4970 } 4971 4972 /* See if we are stripping this symbol. */ 4973 skip = FALSE; 4974 switch (strip) 4975 { 4976 case strip_none: 4977 break; 4978 case strip_debugger: 4979 if ((type & N_STAB) != 0) 4980 skip = TRUE; 4981 break; 4982 case strip_some: 4983 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE) 4984 == NULL) 4985 skip = TRUE; 4986 break; 4987 case strip_all: 4988 skip = TRUE; 4989 break; 4990 } 4991 if (skip) 4992 { 4993 if (h != NULL) 4994 h->written = TRUE; 4995 continue; 4996 } 4997 4998 /* Get the value of the symbol. */ 4999 if ((type & N_TYPE) == N_TEXT 5000 || type == N_WEAKT) 5001 symsec = obj_textsec (input_bfd); 5002 else if ((type & N_TYPE) == N_DATA 5003 || type == N_WEAKD) 5004 symsec = obj_datasec (input_bfd); 5005 else if ((type & N_TYPE) == N_BSS 5006 || type == N_WEAKB) 5007 symsec = obj_bsssec (input_bfd); 5008 else if ((type & N_TYPE) == N_ABS 5009 || type == N_WEAKA) 5010 symsec = bfd_abs_section_ptr; 5011 else if (((type & N_TYPE) == N_INDR 5012 && (hresolve == NULL 5013 || (hresolve->root.type != bfd_link_hash_defined 5014 && hresolve->root.type != bfd_link_hash_defweak 5015 && hresolve->root.type != bfd_link_hash_common))) 5016 || type == N_WARNING) 5017 { 5018 /* Pass the next symbol through unchanged. The 5019 condition above for indirect symbols is so that if 5020 the indirect symbol was defined, we output it with 5021 the correct definition so the debugger will 5022 understand it. */ 5023 pass = TRUE; 5024 val = GET_WORD (input_bfd, sym->e_value); 5025 symsec = NULL; 5026 } 5027 else if ((type & N_STAB) != 0) 5028 { 5029 val = GET_WORD (input_bfd, sym->e_value); 5030 symsec = NULL; 5031 } 5032 else 5033 { 5034 /* If we get here with an indirect symbol, it means that 5035 we are outputting it with a real definition. In such 5036 a case we do not want to output the next symbol, 5037 which is the target of the indirection. */ 5038 if ((type & N_TYPE) == N_INDR) 5039 skip_next = TRUE; 5040 5041 symsec = NULL; 5042 5043 /* We need to get the value from the hash table. We use 5044 hresolve so that if we have defined an indirect 5045 symbol we output the final definition. */ 5046 if (h == NULL) 5047 { 5048 switch (type & N_TYPE) 5049 { 5050 case N_SETT: 5051 symsec = obj_textsec (input_bfd); 5052 break; 5053 case N_SETD: 5054 symsec = obj_datasec (input_bfd); 5055 break; 5056 case N_SETB: 5057 symsec = obj_bsssec (input_bfd); 5058 break; 5059 case N_SETA: 5060 symsec = bfd_abs_section_ptr; 5061 break; 5062 default: 5063 val = 0; 5064 break; 5065 } 5066 } 5067 else if (hresolve->root.type == bfd_link_hash_defined 5068 || hresolve->root.type == bfd_link_hash_defweak) 5069 { 5070 asection *input_section; 5071 asection *output_section; 5072 5073 /* This case usually means a common symbol which was 5074 turned into a defined symbol. */ 5075 input_section = hresolve->root.u.def.section; 5076 output_section = input_section->output_section; 5077 BFD_ASSERT (bfd_is_abs_section (output_section) 5078 || output_section->owner == output_bfd); 5079 val = (hresolve->root.u.def.value 5080 + bfd_get_section_vma (output_bfd, output_section) 5081 + input_section->output_offset); 5082 5083 /* Get the correct type based on the section. If 5084 this is a constructed set, force it to be 5085 globally visible. */ 5086 if (type == N_SETT 5087 || type == N_SETD 5088 || type == N_SETB 5089 || type == N_SETA) 5090 type |= N_EXT; 5091 5092 type &=~ N_TYPE; 5093 5094 if (output_section == obj_textsec (output_bfd)) 5095 type |= (hresolve->root.type == bfd_link_hash_defined 5096 ? N_TEXT 5097 : N_WEAKT); 5098 else if (output_section == obj_datasec (output_bfd)) 5099 type |= (hresolve->root.type == bfd_link_hash_defined 5100 ? N_DATA 5101 : N_WEAKD); 5102 else if (output_section == obj_bsssec (output_bfd)) 5103 type |= (hresolve->root.type == bfd_link_hash_defined 5104 ? N_BSS 5105 : N_WEAKB); 5106 else 5107 type |= (hresolve->root.type == bfd_link_hash_defined 5108 ? N_ABS 5109 : N_WEAKA); 5110 } 5111 else if (hresolve->root.type == bfd_link_hash_common) 5112 val = hresolve->root.u.c.size; 5113 else if (hresolve->root.type == bfd_link_hash_undefweak) 5114 { 5115 val = 0; 5116 type = N_WEAKU; 5117 } 5118 else 5119 val = 0; 5120 } 5121 if (symsec != NULL) 5122 val = (symsec->output_section->vma 5123 + symsec->output_offset 5124 + (GET_WORD (input_bfd, sym->e_value) 5125 - symsec->vma)); 5126 5127 /* If this is a global symbol set the written flag, and if 5128 it is a local symbol see if we should discard it. */ 5129 if (h != NULL) 5130 { 5131 h->written = TRUE; 5132 h->indx = obj_aout_external_sym_count (output_bfd); 5133 } 5134 else if ((type & N_TYPE) != N_SETT 5135 && (type & N_TYPE) != N_SETD 5136 && (type & N_TYPE) != N_SETB 5137 && (type & N_TYPE) != N_SETA) 5138 { 5139 switch (discard) 5140 { 5141 case discard_none: 5142 case discard_sec_merge: 5143 break; 5144 case discard_l: 5145 if ((type & N_STAB) == 0 5146 && bfd_is_local_label_name (input_bfd, name)) 5147 skip = TRUE; 5148 break; 5149 case discard_all: 5150 skip = TRUE; 5151 break; 5152 } 5153 if (skip) 5154 { 5155 pass = FALSE; 5156 continue; 5157 } 5158 } 5159 5160 /* An N_BINCL symbol indicates the start of the stabs 5161 entries for a header file. We need to scan ahead to the 5162 next N_EINCL symbol, ignoring nesting, adding up all the 5163 characters in the symbol names, not including the file 5164 numbers in types (the first number after an open 5165 parenthesis). */ 5166 if (type == (int) N_BINCL) 5167 { 5168 struct external_nlist *incl_sym; 5169 int nest; 5170 struct aout_link_includes_entry *incl_entry; 5171 struct aout_link_includes_totals *t; 5172 5173 val = 0; 5174 nest = 0; 5175 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 5176 { 5177 int incl_type; 5178 5179 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5180 if (incl_type == (int) N_EINCL) 5181 { 5182 if (nest == 0) 5183 break; 5184 --nest; 5185 } 5186 else if (incl_type == (int) N_BINCL) 5187 ++nest; 5188 else if (nest == 0) 5189 { 5190 const char *s; 5191 5192 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 5193 for (; *s != '\0'; s++) 5194 { 5195 val += *s; 5196 if (*s == '(') 5197 { 5198 /* Skip the file number. */ 5199 ++s; 5200 while (ISDIGIT (*s)) 5201 ++s; 5202 --s; 5203 } 5204 } 5205 } 5206 } 5207 5208 /* If we have already included a header file with the 5209 same value, then replace this one with an N_EXCL 5210 symbol. */ 5211 copy = (bfd_boolean) (! flaginfo->info->keep_memory); 5212 incl_entry = aout_link_includes_lookup (&flaginfo->includes, 5213 name, TRUE, copy); 5214 if (incl_entry == NULL) 5215 return FALSE; 5216 for (t = incl_entry->totals; t != NULL; t = t->next) 5217 if (t->total == val) 5218 break; 5219 if (t == NULL) 5220 { 5221 /* This is the first time we have seen this header 5222 file with this set of stabs strings. */ 5223 t = (struct aout_link_includes_totals *) 5224 bfd_hash_allocate (&flaginfo->includes.root, 5225 sizeof *t); 5226 if (t == NULL) 5227 return FALSE; 5228 t->total = val; 5229 t->next = incl_entry->totals; 5230 incl_entry->totals = t; 5231 } 5232 else 5233 { 5234 int *incl_map; 5235 5236 /* This is a duplicate header file. We must change 5237 it to be an N_EXCL entry, and mark all the 5238 included symbols to prevent outputting them. */ 5239 type = (int) N_EXCL; 5240 5241 nest = 0; 5242 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 5243 incl_sym < sym_end; 5244 incl_sym++, incl_map++) 5245 { 5246 int incl_type; 5247 5248 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5249 if (incl_type == (int) N_EINCL) 5250 { 5251 if (nest == 0) 5252 { 5253 *incl_map = -1; 5254 break; 5255 } 5256 --nest; 5257 } 5258 else if (incl_type == (int) N_BINCL) 5259 ++nest; 5260 else if (nest == 0) 5261 *incl_map = -1; 5262 } 5263 } 5264 } 5265 } 5266 5267 /* Copy this symbol into the list of symbols we are going to 5268 write out. */ 5269 H_PUT_8 (output_bfd, type, outsym->e_type); 5270 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 5271 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 5272 copy = FALSE; 5273 if (! flaginfo->info->keep_memory) 5274 { 5275 /* name points into a string table which we are going to 5276 free. If there is a hash table entry, use that string. 5277 Otherwise, copy name into memory. */ 5278 if (h != NULL) 5279 name = h->root.root.string; 5280 else 5281 copy = TRUE; 5282 } 5283 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab, 5284 name, copy); 5285 if (strtab_index == (bfd_size_type) -1) 5286 return FALSE; 5287 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 5288 PUT_WORD (output_bfd, val, outsym->e_value); 5289 *symbol_map = obj_aout_external_sym_count (output_bfd); 5290 ++obj_aout_external_sym_count (output_bfd); 5291 ++outsym; 5292 } 5293 5294 /* Write out the output symbols we have just constructed. */ 5295 if (outsym > flaginfo->output_syms) 5296 { 5297 bfd_size_type outsym_size; 5298 5299 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0) 5300 return FALSE; 5301 outsym_size = outsym - flaginfo->output_syms; 5302 outsym_size *= EXTERNAL_NLIST_SIZE; 5303 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd) 5304 != outsym_size) 5305 return FALSE; 5306 flaginfo->symoff += outsym_size; 5307 } 5308 5309 return TRUE; 5310} 5311 5312/* Link an a.out input BFD into the output file. */ 5313 5314static bfd_boolean 5315aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd) 5316{ 5317 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 5318 5319 /* If this is a dynamic object, it may need special handling. */ 5320 if ((input_bfd->flags & DYNAMIC) != 0 5321 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 5322 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 5323 (flaginfo->info, input_bfd)); 5324 5325 /* Get the symbols. We probably have them already, unless 5326 flaginfo->info->keep_memory is FALSE. */ 5327 if (! aout_get_external_symbols (input_bfd)) 5328 return FALSE; 5329 5330 /* Write out the symbols and get a map of the new indices. The map 5331 is placed into flaginfo->symbol_map. */ 5332 if (! aout_link_write_symbols (flaginfo, input_bfd)) 5333 return FALSE; 5334 5335 /* Relocate and write out the sections. These functions use the 5336 symbol map created by aout_link_write_symbols. The linker_mark 5337 field will be set if these sections are to be included in the 5338 link, which will normally be the case. */ 5339 if (obj_textsec (input_bfd)->linker_mark) 5340 { 5341 if (! aout_link_input_section (flaginfo, input_bfd, 5342 obj_textsec (input_bfd), 5343 &flaginfo->treloff, 5344 exec_hdr (input_bfd)->a_trsize)) 5345 return FALSE; 5346 } 5347 if (obj_datasec (input_bfd)->linker_mark) 5348 { 5349 if (! aout_link_input_section (flaginfo, input_bfd, 5350 obj_datasec (input_bfd), 5351 &flaginfo->dreloff, 5352 exec_hdr (input_bfd)->a_drsize)) 5353 return FALSE; 5354 } 5355 5356 /* If we are not keeping memory, we don't need the symbols any 5357 longer. We still need them if we are keeping memory, because the 5358 strings in the hash table point into them. */ 5359 if (! flaginfo->info->keep_memory) 5360 { 5361 if (! aout_link_free_symbols (input_bfd)) 5362 return FALSE; 5363 } 5364 5365 return TRUE; 5366} 5367 5368/* Do the final link step. This is called on the output BFD. The 5369 INFO structure should point to a list of BFDs linked through the 5370 link.next field which can be used to find each BFD which takes part 5371 in the output. Also, each section in ABFD should point to a list 5372 of bfd_link_order structures which list all the input sections for 5373 the output section. */ 5374 5375bfd_boolean 5376NAME (aout, final_link) (bfd *abfd, 5377 struct bfd_link_info *info, 5378 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) 5379{ 5380 struct aout_final_link_info aout_info; 5381 bfd_boolean includes_hash_initialized = FALSE; 5382 bfd *sub; 5383 bfd_size_type trsize, drsize; 5384 bfd_size_type max_contents_size; 5385 bfd_size_type max_relocs_size; 5386 bfd_size_type max_sym_count; 5387 struct bfd_link_order *p; 5388 asection *o; 5389 bfd_boolean have_link_order_relocs; 5390 5391 if (bfd_link_pic (info)) 5392 abfd->flags |= DYNAMIC; 5393 5394 aout_info.info = info; 5395 aout_info.output_bfd = abfd; 5396 aout_info.contents = NULL; 5397 aout_info.relocs = NULL; 5398 aout_info.symbol_map = NULL; 5399 aout_info.output_syms = NULL; 5400 5401 if (!bfd_hash_table_init_n (&aout_info.includes.root, 5402 aout_link_includes_newfunc, 5403 sizeof (struct aout_link_includes_entry), 5404 251)) 5405 goto error_return; 5406 includes_hash_initialized = TRUE; 5407 5408 /* Figure out the largest section size. Also, if generating 5409 relocatable output, count the relocs. */ 5410 trsize = 0; 5411 drsize = 0; 5412 max_contents_size = 0; 5413 max_relocs_size = 0; 5414 max_sym_count = 0; 5415 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5416 { 5417 bfd_size_type sz; 5418 5419 if (bfd_link_relocatable (info)) 5420 { 5421 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5422 { 5423 trsize += exec_hdr (sub)->a_trsize; 5424 drsize += exec_hdr (sub)->a_drsize; 5425 } 5426 else 5427 { 5428 /* FIXME: We need to identify the .text and .data sections 5429 and call get_reloc_upper_bound and canonicalize_reloc to 5430 work out the number of relocs needed, and then multiply 5431 by the reloc size. */ 5432 _bfd_error_handler 5433 /* xgettext:c-format */ 5434 (_("%pB: relocatable link from %s to %s not supported"), 5435 abfd, sub->xvec->name, abfd->xvec->name); 5436 bfd_set_error (bfd_error_invalid_operation); 5437 goto error_return; 5438 } 5439 } 5440 5441 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5442 { 5443 sz = obj_textsec (sub)->size; 5444 if (sz > max_contents_size) 5445 max_contents_size = sz; 5446 sz = obj_datasec (sub)->size; 5447 if (sz > max_contents_size) 5448 max_contents_size = sz; 5449 5450 sz = exec_hdr (sub)->a_trsize; 5451 if (sz > max_relocs_size) 5452 max_relocs_size = sz; 5453 sz = exec_hdr (sub)->a_drsize; 5454 if (sz > max_relocs_size) 5455 max_relocs_size = sz; 5456 5457 sz = obj_aout_external_sym_count (sub); 5458 if (sz > max_sym_count) 5459 max_sym_count = sz; 5460 } 5461 } 5462 5463 if (bfd_link_relocatable (info)) 5464 { 5465 if (obj_textsec (abfd) != NULL) 5466 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 5467 ->map_head.link_order) 5468 * obj_reloc_entry_size (abfd)); 5469 if (obj_datasec (abfd) != NULL) 5470 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 5471 ->map_head.link_order) 5472 * obj_reloc_entry_size (abfd)); 5473 } 5474 5475 exec_hdr (abfd)->a_trsize = trsize; 5476 exec_hdr (abfd)->a_drsize = drsize; 5477 5478 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 5479 5480 /* Adjust the section sizes and vmas according to the magic number. 5481 This sets a_text, a_data and a_bss in the exec_hdr and sets the 5482 filepos for each section. */ 5483 if (! NAME (aout, adjust_sizes_and_vmas) (abfd)) 5484 goto error_return; 5485 5486 /* The relocation and symbol file positions differ among a.out 5487 targets. We are passed a callback routine from the backend 5488 specific code to handle this. 5489 FIXME: At this point we do not know how much space the symbol 5490 table will require. This will not work for any (nonstandard) 5491 a.out target that needs to know the symbol table size before it 5492 can compute the relocation file positions. */ 5493 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 5494 &aout_info.symoff); 5495 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 5496 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 5497 obj_sym_filepos (abfd) = aout_info.symoff; 5498 5499 /* We keep a count of the symbols as we output them. */ 5500 obj_aout_external_sym_count (abfd) = 0; 5501 5502 /* We accumulate the string table as we write out the symbols. */ 5503 aout_info.strtab = _bfd_stringtab_init (); 5504 if (aout_info.strtab == NULL) 5505 goto error_return; 5506 5507 /* Allocate buffers to hold section contents and relocs. */ 5508 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); 5509 aout_info.relocs = bfd_malloc (max_relocs_size); 5510 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int)); 5511 aout_info.output_syms = (struct external_nlist *) 5512 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist)); 5513 if ((aout_info.contents == NULL && max_contents_size != 0) 5514 || (aout_info.relocs == NULL && max_relocs_size != 0) 5515 || (aout_info.symbol_map == NULL && max_sym_count != 0) 5516 || aout_info.output_syms == NULL) 5517 goto error_return; 5518 5519 /* If we have a symbol named __DYNAMIC, force it out now. This is 5520 required by SunOS. Doing this here rather than in sunos.c is a 5521 hack, but it's easier than exporting everything which would be 5522 needed. */ 5523 { 5524 struct aout_link_hash_entry *h; 5525 5526 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 5527 FALSE, FALSE, FALSE); 5528 if (h != NULL) 5529 aout_link_write_other_symbol (&h->root.root, &aout_info); 5530 } 5531 5532 /* The most time efficient way to do the link would be to read all 5533 the input object files into memory and then sort out the 5534 information into the output file. Unfortunately, that will 5535 probably use too much memory. Another method would be to step 5536 through everything that composes the text section and write it 5537 out, and then everything that composes the data section and write 5538 it out, and then write out the relocs, and then write out the 5539 symbols. Unfortunately, that requires reading stuff from each 5540 input file several times, and we will not be able to keep all the 5541 input files open simultaneously, and reopening them will be slow. 5542 5543 What we do is basically process one input file at a time. We do 5544 everything we need to do with an input file once--copy over the 5545 section contents, handle the relocation information, and write 5546 out the symbols--and then we throw away the information we read 5547 from it. This approach requires a lot of lseeks of the output 5548 file, which is unfortunate but still faster than reopening a lot 5549 of files. 5550 5551 We use the output_has_begun field of the input BFDs to see 5552 whether we have already handled it. */ 5553 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) 5554 sub->output_has_begun = FALSE; 5555 5556 /* Mark all sections which are to be included in the link. This 5557 will normally be every section. We need to do this so that we 5558 can identify any sections which the linker has decided to not 5559 include. */ 5560 for (o = abfd->sections; o != NULL; o = o->next) 5561 { 5562 for (p = o->map_head.link_order; p != NULL; p = p->next) 5563 if (p->type == bfd_indirect_link_order) 5564 p->u.indirect.section->linker_mark = TRUE; 5565 } 5566 5567 have_link_order_relocs = FALSE; 5568 for (o = abfd->sections; o != NULL; o = o->next) 5569 { 5570 for (p = o->map_head.link_order; 5571 p != NULL; 5572 p = p->next) 5573 { 5574 if (p->type == bfd_indirect_link_order 5575 && (bfd_get_flavour (p->u.indirect.section->owner) 5576 == bfd_target_aout_flavour)) 5577 { 5578 bfd *input_bfd; 5579 5580 input_bfd = p->u.indirect.section->owner; 5581 if (! input_bfd->output_has_begun) 5582 { 5583 if (! aout_link_input_bfd (&aout_info, input_bfd)) 5584 goto error_return; 5585 input_bfd->output_has_begun = TRUE; 5586 } 5587 } 5588 else if (p->type == bfd_section_reloc_link_order 5589 || p->type == bfd_symbol_reloc_link_order) 5590 { 5591 /* These are handled below. */ 5592 have_link_order_relocs = TRUE; 5593 } 5594 else 5595 { 5596 if (! _bfd_default_link_order (abfd, info, o, p)) 5597 goto error_return; 5598 } 5599 } 5600 } 5601 5602 /* Write out any symbols that we have not already written out. */ 5603 bfd_hash_traverse (&info->hash->table, 5604 aout_link_write_other_symbol, 5605 &aout_info); 5606 5607 /* Now handle any relocs we were asked to create by the linker. 5608 These did not come from any input file. We must do these after 5609 we have written out all the symbols, so that we know the symbol 5610 indices to use. */ 5611 if (have_link_order_relocs) 5612 { 5613 for (o = abfd->sections; o != NULL; o = o->next) 5614 { 5615 for (p = o->map_head.link_order; 5616 p != NULL; 5617 p = p->next) 5618 { 5619 if (p->type == bfd_section_reloc_link_order 5620 || p->type == bfd_symbol_reloc_link_order) 5621 { 5622 if (! aout_link_reloc_link_order (&aout_info, o, p)) 5623 goto error_return; 5624 } 5625 } 5626 } 5627 } 5628 5629 if (aout_info.contents != NULL) 5630 { 5631 free (aout_info.contents); 5632 aout_info.contents = NULL; 5633 } 5634 if (aout_info.relocs != NULL) 5635 { 5636 free (aout_info.relocs); 5637 aout_info.relocs = NULL; 5638 } 5639 if (aout_info.symbol_map != NULL) 5640 { 5641 free (aout_info.symbol_map); 5642 aout_info.symbol_map = NULL; 5643 } 5644 if (aout_info.output_syms != NULL) 5645 { 5646 free (aout_info.output_syms); 5647 aout_info.output_syms = NULL; 5648 } 5649 if (includes_hash_initialized) 5650 { 5651 bfd_hash_table_free (&aout_info.includes.root); 5652 includes_hash_initialized = FALSE; 5653 } 5654 5655 /* Finish up any dynamic linking we may be doing. */ 5656 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 5657 { 5658 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 5659 goto error_return; 5660 } 5661 5662 /* Update the header information. */ 5663 abfd->symcount = obj_aout_external_sym_count (abfd); 5664 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 5665 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 5666 obj_textsec (abfd)->reloc_count = 5667 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 5668 obj_datasec (abfd)->reloc_count = 5669 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 5670 5671 /* Write out the string table, unless there are no symbols. */ 5672 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0) 5673 goto error_return; 5674 if (abfd->symcount > 0) 5675 { 5676 if (!emit_stringtab (abfd, aout_info.strtab)) 5677 goto error_return; 5678 } 5679 else 5680 { 5681 bfd_byte b[BYTES_IN_WORD]; 5682 5683 memset (b, 0, BYTES_IN_WORD); 5684 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD) 5685 goto error_return; 5686 } 5687 5688 return TRUE; 5689 5690 error_return: 5691 if (aout_info.contents != NULL) 5692 free (aout_info.contents); 5693 if (aout_info.relocs != NULL) 5694 free (aout_info.relocs); 5695 if (aout_info.symbol_map != NULL) 5696 free (aout_info.symbol_map); 5697 if (aout_info.output_syms != NULL) 5698 free (aout_info.output_syms); 5699 if (includes_hash_initialized) 5700 bfd_hash_table_free (&aout_info.includes.root); 5701 return FALSE; 5702} 5703