1/* BFD semi-generic back-end for a.out binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24/* 25SECTION 26 a.out backends 27 28DESCRIPTION 29 30 BFD supports a number of different flavours of a.out format, 31 though the major differences are only the sizes of the 32 structures on disk, and the shape of the relocation 33 information. 34 35 The support is split into a basic support file @file{aoutx.h} 36 and other files which derive functions from the base. One 37 derivation file is @file{aoutf1.h} (for a.out flavour 1), and 38 adds to the basic a.out functions support for sun3, sun4, 386 39 and 29k a.out files, to create a target jump vector for a 40 specific target. 41 42 This information is further split out into more specific files 43 for each machine, including @file{sunos.c} for sun3 and sun4, 44 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a 45 demonstration of a 64 bit a.out format. 46 47 The base file @file{aoutx.h} defines general mechanisms for 48 reading and writing records to and from disk and various 49 other methods which BFD requires. It is included by 50 @file{aout32.c} and @file{aout64.c} to form the names 51 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. 52 53 As an example, this is what goes on to make the back end for a 54 sun4, from @file{aout32.c}: 55 56| #define ARCH_SIZE 32 57| #include "aoutx.h" 58 59 Which exports names: 60 61| ... 62| aout_32_canonicalize_reloc 63| aout_32_find_nearest_line 64| aout_32_get_lineno 65| aout_32_get_reloc_upper_bound 66| ... 67 68 from @file{sunos.c}: 69 70| #define TARGET_NAME "a.out-sunos-big" 71| #define VECNAME sunos_big_vec 72| #include "aoutf1.h" 73 74 requires all the names from @file{aout32.c}, and produces the jump vector 75 76| sunos_big_vec 77 78 The file @file{host-aout.c} is a special case. It is for a large set 79 of hosts that use ``more or less standard'' a.out files, and 80 for which cross-debugging is not interesting. It uses the 81 standard 32-bit a.out support routines, but determines the 82 file offsets and addresses of the text, data, and BSS 83 sections, the machine architecture and machine type, and the 84 entry point address, in a host-dependent manner. Once these 85 values have been determined, generic code is used to handle 86 the object file. 87 88 When porting it to run on a new system, you must supply: 89 90| HOST_PAGE_SIZE 91| HOST_SEGMENT_SIZE 92| HOST_MACHINE_ARCH (optional) 93| HOST_MACHINE_MACHINE (optional) 94| HOST_TEXT_START_ADDR 95| HOST_STACK_END_ADDR 96 97 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These 98 values, plus the structures and macros defined in @file{a.out.h} on 99 your host system, will produce a BFD target that will access 100 ordinary a.out files on your host. To configure a new machine 101 to use @file{host-aout.c}, specify: 102 103| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec 104| TDEPFILES= host-aout.o trad-core.o 105 106 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in} 107 to use the 108 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your 109 configuration is selected. */ 110 111/* Some assumptions: 112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa. 113 Doesn't matter what the setting of WP_TEXT is on output, but it'll 114 get set on input. 115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. 116 * Any BFD with both flags clear is OMAGIC. 117 (Just want to make these explicit, so the conditions tested in this 118 file make sense if you're more familiar with a.out than with BFD.) */ 119 120#define KEEPIT udata.i 121 122#include "sysdep.h" 123#include "bfd.h" 124#include "safe-ctype.h" 125#include "bfdlink.h" 126 127#include "libaout.h" 128#include "libbfd.h" 129#include "aout/aout64.h" 130#include "aout/stab_gnu.h" 131#include "aout/ar.h" 132 133/* 134SUBSECTION 135 Relocations 136 137DESCRIPTION 138 The file @file{aoutx.h} provides for both the @emph{standard} 139 and @emph{extended} forms of a.out relocation records. 140 141 The standard records contain only an 142 address, a symbol index, and a type field. The extended records 143 (used on 29ks and sparcs) also have a full integer for an 144 addend. */ 145 146#ifndef CTOR_TABLE_RELOC_HOWTO 147#define CTOR_TABLE_RELOC_IDX 2 148#define CTOR_TABLE_RELOC_HOWTO(BFD) \ 149 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \ 150 ? howto_table_ext : howto_table_std) \ 151 + CTOR_TABLE_RELOC_IDX) 152#endif 153 154#ifndef MY_swap_std_reloc_in 155#define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in) 156#endif 157 158#ifndef MY_swap_ext_reloc_in 159#define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in) 160#endif 161 162#ifndef MY_swap_std_reloc_out 163#define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out) 164#endif 165 166#ifndef MY_swap_ext_reloc_out 167#define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out) 168#endif 169 170#ifndef MY_final_link_relocate 171#define MY_final_link_relocate _bfd_final_link_relocate 172#endif 173 174#ifndef MY_relocate_contents 175#define MY_relocate_contents _bfd_relocate_contents 176#endif 177 178#define howto_table_ext NAME (aout, ext_howto_table) 179#define howto_table_std NAME (aout, std_howto_table) 180 181reloc_howto_type howto_table_ext[] = 182{ 183 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 184 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE), 185 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE), 186 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE), 187 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE), 188 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE), 189 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE), 190 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE), 191 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE), 192 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE), 193 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE), 194 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE), 195 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE), 196 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE), 197 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE), 198 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE), 199 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE), 200 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE), 201 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE), 202 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE), 203 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE), 204 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE), 205 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE), 206 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE), 207 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE), 208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 209 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE), 210#define RELOC_SPARC_REV32 RELOC_WDISP19 211 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE), 212}; 213 214/* Convert standard reloc records to "arelent" format (incl byte swap). */ 215 216reloc_howto_type howto_table_std[] = 217{ 218 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */ 219HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), 220HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 221HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), 222HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE), 223HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), 224HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), 225HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), 226HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE), 227HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE), 228HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE), 229HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE), 230EMPTY_HOWTO (-1), 231EMPTY_HOWTO (-1), 232EMPTY_HOWTO (-1), 233EMPTY_HOWTO (-1), 234EMPTY_HOWTO (-1), 235 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE), 236EMPTY_HOWTO (-1), 237EMPTY_HOWTO (-1), 238EMPTY_HOWTO (-1), 239EMPTY_HOWTO (-1), 240EMPTY_HOWTO (-1), 241EMPTY_HOWTO (-1), 242EMPTY_HOWTO (-1), 243EMPTY_HOWTO (-1), 244EMPTY_HOWTO (-1), 245EMPTY_HOWTO (-1), 246EMPTY_HOWTO (-1), 247EMPTY_HOWTO (-1), 248EMPTY_HOWTO (-1), 249EMPTY_HOWTO (-1), 250EMPTY_HOWTO (-1), 251 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE), 252EMPTY_HOWTO (-1), 253EMPTY_HOWTO (-1), 254EMPTY_HOWTO (-1), 255EMPTY_HOWTO (-1), 256EMPTY_HOWTO (-1), 257EMPTY_HOWTO (-1), 258EMPTY_HOWTO (-1), 259 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE), 260}; 261 262#define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0])) 263 264reloc_howto_type * 265NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) 266{ 267#define EXT(i, j) case i: return & howto_table_ext [j] 268#define STD(i, j) case i: return & howto_table_std [j] 269 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 270 271 if (code == BFD_RELOC_CTOR) 272 switch (bfd_get_arch_info (abfd)->bits_per_address) 273 { 274 case 32: 275 code = BFD_RELOC_32; 276 break; 277 case 64: 278 code = BFD_RELOC_64; 279 break; 280 } 281 282 if (ext) 283 switch (code) 284 { 285 EXT (BFD_RELOC_8, 0); 286 EXT (BFD_RELOC_16, 1); 287 EXT (BFD_RELOC_32, 2); 288 EXT (BFD_RELOC_HI22, 8); 289 EXT (BFD_RELOC_LO10, 11); 290 EXT (BFD_RELOC_32_PCREL_S2, 6); 291 EXT (BFD_RELOC_SPARC_WDISP22, 7); 292 EXT (BFD_RELOC_SPARC13, 10); 293 EXT (BFD_RELOC_SPARC_GOT10, 14); 294 EXT (BFD_RELOC_SPARC_BASE13, 15); 295 EXT (BFD_RELOC_SPARC_GOT13, 15); 296 EXT (BFD_RELOC_SPARC_GOT22, 16); 297 EXT (BFD_RELOC_SPARC_PC10, 17); 298 EXT (BFD_RELOC_SPARC_PC22, 18); 299 EXT (BFD_RELOC_SPARC_WPLT30, 19); 300 EXT (BFD_RELOC_SPARC_REV32, 26); 301 default: 302 return NULL; 303 } 304 else 305 /* std relocs. */ 306 switch (code) 307 { 308 STD (BFD_RELOC_8, 0); 309 STD (BFD_RELOC_16, 1); 310 STD (BFD_RELOC_32, 2); 311 STD (BFD_RELOC_8_PCREL, 4); 312 STD (BFD_RELOC_16_PCREL, 5); 313 STD (BFD_RELOC_32_PCREL, 6); 314 STD (BFD_RELOC_16_BASEREL, 9); 315 STD (BFD_RELOC_32_BASEREL, 10); 316 default: 317 return NULL; 318 } 319} 320 321reloc_howto_type * 322NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name) 323{ 324 unsigned int i, size; 325 reloc_howto_type *howto_table; 326 327 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE) 328 { 329 howto_table = howto_table_ext; 330 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]); 331 } 332 else 333 { 334 howto_table = howto_table_std; 335 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]); 336 } 337 338 for (i = 0; i < size; i++) 339 if (howto_table[i].name != NULL 340 && strcasecmp (howto_table[i].name, r_name) == 0) 341 return &howto_table[i]; 342 343 return NULL; 344} 345 346/* 347SUBSECTION 348 Internal entry points 349 350DESCRIPTION 351 @file{aoutx.h} exports several routines for accessing the 352 contents of an a.out file, which are gathered and exported in 353 turn by various format specific files (eg sunos.c). 354*/ 355 356/* 357FUNCTION 358 aout_@var{size}_swap_exec_header_in 359 360SYNOPSIS 361 void aout_@var{size}_swap_exec_header_in, 362 (bfd *abfd, 363 struct external_exec *bytes, 364 struct internal_exec *execp); 365 366DESCRIPTION 367 Swap the information in an executable header @var{raw_bytes} taken 368 from a raw byte stream memory image into the internal exec header 369 structure @var{execp}. 370*/ 371 372#ifndef NAME_swap_exec_header_in 373void 374NAME (aout, swap_exec_header_in) (bfd *abfd, 375 struct external_exec *bytes, 376 struct internal_exec *execp) 377{ 378 /* The internal_exec structure has some fields that are unused in this 379 configuration (IE for i960), so ensure that all such uninitialized 380 fields are zero'd out. There are places where two of these structs 381 are memcmp'd, and thus the contents do matter. */ 382 memset ((void *) execp, 0, sizeof (struct internal_exec)); 383 /* Now fill in fields in the execp, from the bytes in the raw data. */ 384 execp->a_info = H_GET_32 (abfd, bytes->e_info); 385 execp->a_text = GET_WORD (abfd, bytes->e_text); 386 execp->a_data = GET_WORD (abfd, bytes->e_data); 387 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 388 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 389 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 390 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 391 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 392} 393#define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) 394#endif 395 396/* 397FUNCTION 398 aout_@var{size}_swap_exec_header_out 399 400SYNOPSIS 401 void aout_@var{size}_swap_exec_header_out 402 (bfd *abfd, 403 struct internal_exec *execp, 404 struct external_exec *raw_bytes); 405 406DESCRIPTION 407 Swap the information in an internal exec header structure 408 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 409*/ 410void 411NAME (aout, swap_exec_header_out) (bfd *abfd, 412 struct internal_exec *execp, 413 struct external_exec *bytes) 414{ 415 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 416 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 417 PUT_WORD (abfd, execp->a_text , bytes->e_text); 418 PUT_WORD (abfd, execp->a_data , bytes->e_data); 419 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 420 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 421 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 422 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 423 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 424} 425 426/* Make all the section for an a.out file. */ 427 428bfd_boolean 429NAME (aout, make_sections) (bfd *abfd) 430{ 431 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) 432 return FALSE; 433 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) 434 return FALSE; 435 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) 436 return FALSE; 437 return TRUE; 438} 439 440/* 441FUNCTION 442 aout_@var{size}_some_aout_object_p 443 444SYNOPSIS 445 const bfd_target *aout_@var{size}_some_aout_object_p 446 (bfd *abfd, 447 struct internal_exec *execp, 448 const bfd_target *(*callback_to_real_object_p) (bfd *)); 449 450DESCRIPTION 451 Some a.out variant thinks that the file open in @var{abfd} 452 checking is an a.out file. Do some more checking, and set up 453 for access if it really is. Call back to the calling 454 environment's "finish up" function just before returning, to 455 handle any last-minute setup. 456*/ 457 458const bfd_target * 459NAME (aout, some_aout_object_p) (bfd *abfd, 460 struct internal_exec *execp, 461 const bfd_target *(*callback_to_real_object_p) (bfd *)) 462{ 463 struct aout_data_struct *rawptr, *oldrawptr; 464 const bfd_target *result; 465 bfd_size_type amt = sizeof (* rawptr); 466 467 rawptr = bfd_zalloc (abfd, amt); 468 if (rawptr == NULL) 469 return NULL; 470 471 oldrawptr = abfd->tdata.aout_data; 472 abfd->tdata.aout_data = rawptr; 473 474 /* Copy the contents of the old tdata struct. 475 In particular, we want the subformat, since for hpux it was set in 476 hp300hpux.c:swap_exec_header_in and will be used in 477 hp300hpux.c:callback. */ 478 if (oldrawptr != NULL) 479 *abfd->tdata.aout_data = *oldrawptr; 480 481 abfd->tdata.aout_data->a.hdr = &rawptr->e; 482 /* Copy in the internal_exec struct. */ 483 *(abfd->tdata.aout_data->a.hdr) = *execp; 484 execp = abfd->tdata.aout_data->a.hdr; 485 486 /* Set the file flags. */ 487 abfd->flags = BFD_NO_FLAGS; 488 if (execp->a_drsize || execp->a_trsize) 489 abfd->flags |= HAS_RELOC; 490 /* Setting of EXEC_P has been deferred to the bottom of this function. */ 491 if (execp->a_syms) 492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 493 if (N_DYNAMIC (*execp)) 494 abfd->flags |= DYNAMIC; 495 496 if (N_MAGIC (*execp) == ZMAGIC) 497 { 498 abfd->flags |= D_PAGED | WP_TEXT; 499 adata (abfd).magic = z_magic; 500 } 501 else if (N_MAGIC (*execp) == QMAGIC) 502 { 503 abfd->flags |= D_PAGED | WP_TEXT; 504 adata (abfd).magic = z_magic; 505 adata (abfd).subformat = q_magic_format; 506 } 507 else if (N_MAGIC (*execp) == NMAGIC) 508 { 509 abfd->flags |= WP_TEXT; 510 adata (abfd).magic = n_magic; 511 } 512 else if (N_MAGIC (*execp) == OMAGIC 513 || N_MAGIC (*execp) == BMAGIC) 514 adata (abfd).magic = o_magic; 515 else 516 /* Should have been checked with N_BADMAG before this routine 517 was called. */ 518 abort (); 519 520 bfd_get_start_address (abfd) = execp->a_entry; 521 522 obj_aout_symbols (abfd) = NULL; 523 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 524 525 /* The default relocation entry size is that of traditional V7 Unix. */ 526 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 527 528 /* The default symbol entry size is that of traditional Unix. */ 529 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 530 531#ifdef USE_MMAP 532 bfd_init_window (&obj_aout_sym_window (abfd)); 533 bfd_init_window (&obj_aout_string_window (abfd)); 534#endif 535 obj_aout_external_syms (abfd) = NULL; 536 obj_aout_external_strings (abfd) = NULL; 537 obj_aout_sym_hashes (abfd) = NULL; 538 539 if (! NAME (aout, make_sections) (abfd)) 540 goto error_ret; 541 542 obj_datasec (abfd)->size = execp->a_data; 543 obj_bsssec (abfd)->size = execp->a_bss; 544 545 obj_textsec (abfd)->flags = 546 (execp->a_trsize != 0 547 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 548 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 549 obj_datasec (abfd)->flags = 550 (execp->a_drsize != 0 551 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 552 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 553 obj_bsssec (abfd)->flags = SEC_ALLOC; 554 555#ifdef THIS_IS_ONLY_DOCUMENTATION 556 /* The common code can't fill in these things because they depend 557 on either the start address of the text segment, the rounding 558 up of virtual addresses between segments, or the starting file 559 position of the text segment -- all of which varies among different 560 versions of a.out. */ 561 562 /* Call back to the format-dependent code to fill in the rest of the 563 fields and do any further cleanup. Things that should be filled 564 in by the callback: */ 565 566 struct exec *execp = exec_hdr (abfd); 567 568 obj_textsec (abfd)->size = N_TXTSIZE (*execp); 569 /* Data and bss are already filled in since they're so standard. */ 570 571 /* The virtual memory addresses of the sections. */ 572 obj_textsec (abfd)->vma = N_TXTADDR (*execp); 573 obj_datasec (abfd)->vma = N_DATADDR (*execp); 574 obj_bsssec (abfd)->vma = N_BSSADDR (*execp); 575 576 /* The file offsets of the sections. */ 577 obj_textsec (abfd)->filepos = N_TXTOFF (*execp); 578 obj_datasec (abfd)->filepos = N_DATOFF (*execp); 579 580 /* The file offsets of the relocation info. */ 581 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp); 582 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp); 583 584 /* The file offsets of the string table and symbol table. */ 585 obj_str_filepos (abfd) = N_STROFF (*execp); 586 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 587 588 /* Determine the architecture and machine type of the object file. */ 589 switch (N_MACHTYPE (*exec_hdr (abfd))) 590 { 591 default: 592 abfd->obj_arch = bfd_arch_obscure; 593 break; 594 } 595 596 adata (abfd)->page_size = TARGET_PAGE_SIZE; 597 adata (abfd)->segment_size = SEGMENT_SIZE; 598 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 599 600 return abfd->xvec; 601 602 /* The architecture is encoded in various ways in various a.out variants, 603 or is not encoded at all in some of them. The relocation size depends 604 on the architecture and the a.out variant. Finally, the return value 605 is the bfd_target vector in use. If an error occurs, return zero and 606 set bfd_error to the appropriate error code. 607 608 Formats such as b.out, which have additional fields in the a.out 609 header, should cope with them in this callback as well. */ 610#endif /* DOCUMENTATION */ 611 612 result = (*callback_to_real_object_p) (abfd); 613 614 /* Now that the segment addresses have been worked out, take a better 615 guess at whether the file is executable. If the entry point 616 is within the text segment, assume it is. (This makes files 617 executable even if their entry point address is 0, as long as 618 their text starts at zero.). 619 620 This test had to be changed to deal with systems where the text segment 621 runs at a different location than the default. The problem is that the 622 entry address can appear to be outside the text segment, thus causing an 623 erroneous conclusion that the file isn't executable. 624 625 To fix this, we now accept any non-zero entry point as an indication of 626 executability. This will work most of the time, since only the linker 627 sets the entry point, and that is likely to be non-zero for most systems. */ 628 629 if (execp->a_entry != 0 630 || (execp->a_entry >= obj_textsec (abfd)->vma 631 && execp->a_entry < (obj_textsec (abfd)->vma 632 + obj_textsec (abfd)->size))) 633 abfd->flags |= EXEC_P; 634#ifdef STAT_FOR_EXEC 635 else 636 { 637 struct stat stat_buf; 638 639 /* The original heuristic doesn't work in some important cases. 640 The a.out file has no information about the text start 641 address. For files (like kernels) linked to non-standard 642 addresses (ld -Ttext nnn) the entry point may not be between 643 the default text start (obj_textsec(abfd)->vma) and 644 (obj_textsec(abfd)->vma) + text size. This is not just a mach 645 issue. Many kernels are loaded at non standard addresses. */ 646 if (abfd->iostream != NULL 647 && (abfd->flags & BFD_IN_MEMORY) == 0 648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0) 649 && ((stat_buf.st_mode & 0111) != 0)) 650 abfd->flags |= EXEC_P; 651 } 652#endif /* STAT_FOR_EXEC */ 653 654 if (result) 655 return result; 656 657 error_ret: 658 bfd_release (abfd, rawptr); 659 abfd->tdata.aout_data = oldrawptr; 660 return NULL; 661} 662 663/* 664FUNCTION 665 aout_@var{size}_mkobject 666 667SYNOPSIS 668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd); 669 670DESCRIPTION 671 Initialize BFD @var{abfd} for use with a.out files. 672*/ 673 674bfd_boolean 675NAME (aout, mkobject) (bfd *abfd) 676{ 677 struct aout_data_struct *rawptr; 678 bfd_size_type amt = sizeof (* rawptr); 679 680 bfd_set_error (bfd_error_system_call); 681 682 rawptr = bfd_zalloc (abfd, amt); 683 if (rawptr == NULL) 684 return FALSE; 685 686 abfd->tdata.aout_data = rawptr; 687 exec_hdr (abfd) = &(rawptr->e); 688 689 obj_textsec (abfd) = NULL; 690 obj_datasec (abfd) = NULL; 691 obj_bsssec (abfd) = NULL; 692 693 return TRUE; 694} 695 696/* 697FUNCTION 698 aout_@var{size}_machine_type 699 700SYNOPSIS 701 enum machine_type aout_@var{size}_machine_type 702 (enum bfd_architecture arch, 703 unsigned long machine, 704 bfd_boolean *unknown); 705 706DESCRIPTION 707 Keep track of machine architecture and machine type for 708 a.out's. Return the <<machine_type>> for a particular 709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 710 and machine can't be represented in a.out format. 711 712 If the architecture is understood, machine type 0 (default) 713 is always understood. 714*/ 715 716enum machine_type 717NAME (aout, machine_type) (enum bfd_architecture arch, 718 unsigned long machine, 719 bfd_boolean *unknown) 720{ 721 enum machine_type arch_flags; 722 723 arch_flags = M_UNKNOWN; 724 *unknown = TRUE; 725 726 switch (arch) 727 { 728 case bfd_arch_sparc: 729 if (machine == 0 730 || machine == bfd_mach_sparc 731 || machine == bfd_mach_sparc_sparclite 732 || machine == bfd_mach_sparc_sparclite_le 733 || machine == bfd_mach_sparc_v8plus 734 || machine == bfd_mach_sparc_v8plusa 735 || machine == bfd_mach_sparc_v8plusb 736 || machine == bfd_mach_sparc_v9 737 || machine == bfd_mach_sparc_v9a 738 || machine == bfd_mach_sparc_v9b) 739 arch_flags = M_SPARC; 740 else if (machine == bfd_mach_sparc_sparclet) 741 arch_flags = M_SPARCLET; 742 break; 743 744 case bfd_arch_m68k: 745 switch (machine) 746 { 747 case 0: arch_flags = M_68010; break; 748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break; 749 case bfd_mach_m68010: arch_flags = M_68010; break; 750 case bfd_mach_m68020: arch_flags = M_68020; break; 751 default: arch_flags = M_UNKNOWN; break; 752 } 753 break; 754 755 case bfd_arch_i386: 756 if (machine == 0 757 || machine == bfd_mach_i386_i386 758 || machine == bfd_mach_i386_i386_intel_syntax) 759 arch_flags = M_386; 760 break; 761 762 case bfd_arch_arm: 763 if (machine == 0) 764 arch_flags = M_ARM; 765 break; 766 767 case bfd_arch_mips: 768 switch (machine) 769 { 770 case 0: 771 case bfd_mach_mips3000: 772 case bfd_mach_mips3900: 773 arch_flags = M_MIPS1; 774 break; 775 case bfd_mach_mips6000: 776 arch_flags = M_MIPS2; 777 break; 778 case bfd_mach_mips4000: 779 case bfd_mach_mips4010: 780 case bfd_mach_mips4100: 781 case bfd_mach_mips4300: 782 case bfd_mach_mips4400: 783 case bfd_mach_mips4600: 784 case bfd_mach_mips4650: 785 case bfd_mach_mips8000: 786 case bfd_mach_mips9000: 787 case bfd_mach_mips10000: 788 case bfd_mach_mips12000: 789 case bfd_mach_mips16: 790 case bfd_mach_mipsisa32: 791 case bfd_mach_mipsisa32r2: 792 case bfd_mach_mips5: 793 case bfd_mach_mipsisa64: 794 case bfd_mach_mipsisa64r2: 795 case bfd_mach_mips_sb1: 796 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 797 arch_flags = M_MIPS2; 798 break; 799 default: 800 arch_flags = M_UNKNOWN; 801 break; 802 } 803 break; 804 805 case bfd_arch_ns32k: 806 switch (machine) 807 { 808 case 0: arch_flags = M_NS32532; break; 809 case 32032: arch_flags = M_NS32032; break; 810 case 32532: arch_flags = M_NS32532; break; 811 default: arch_flags = M_UNKNOWN; break; 812 } 813 break; 814 815 case bfd_arch_vax: 816 *unknown = FALSE; 817 break; 818 819 case bfd_arch_cris: 820 if (machine == 0 || machine == 255) 821 arch_flags = M_CRIS; 822 break; 823 824 case bfd_arch_m88k: 825 *unknown = FALSE; 826 break; 827 828 default: 829 arch_flags = M_UNKNOWN; 830 } 831 832 if (arch_flags != M_UNKNOWN) 833 *unknown = FALSE; 834 835 return arch_flags; 836} 837 838/* 839FUNCTION 840 aout_@var{size}_set_arch_mach 841 842SYNOPSIS 843 bfd_boolean aout_@var{size}_set_arch_mach, 844 (bfd *, 845 enum bfd_architecture arch, 846 unsigned long machine); 847 848DESCRIPTION 849 Set the architecture and the machine of the BFD @var{abfd} to the 850 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 851 can support the architecture required. 852*/ 853 854bfd_boolean 855NAME (aout, set_arch_mach) (bfd *abfd, 856 enum bfd_architecture arch, 857 unsigned long machine) 858{ 859 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 860 return FALSE; 861 862 if (arch != bfd_arch_unknown) 863 { 864 bfd_boolean unknown; 865 866 NAME (aout, machine_type) (arch, machine, &unknown); 867 if (unknown) 868 return FALSE; 869 } 870 871 /* Determine the size of a relocation entry. */ 872 switch (arch) 873 { 874 case bfd_arch_sparc: 875 case bfd_arch_mips: 876 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 877 break; 878 default: 879 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 880 break; 881 } 882 883 return (*aout_backend_info (abfd)->set_sizes) (abfd); 884} 885 886static void 887adjust_o_magic (bfd *abfd, struct internal_exec *execp) 888{ 889 file_ptr pos = adata (abfd).exec_bytes_size; 890 bfd_vma vma = 0; 891 int pad = 0; 892 893 /* Text. */ 894 obj_textsec (abfd)->filepos = pos; 895 if (!obj_textsec (abfd)->user_set_vma) 896 obj_textsec (abfd)->vma = vma; 897 else 898 vma = obj_textsec (abfd)->vma; 899 900 pos += obj_textsec (abfd)->size; 901 vma += obj_textsec (abfd)->size; 902 903 /* Data. */ 904 if (!obj_datasec (abfd)->user_set_vma) 905 { 906 obj_textsec (abfd)->size += pad; 907 pos += pad; 908 vma += pad; 909 obj_datasec (abfd)->vma = vma; 910 } 911 else 912 vma = obj_datasec (abfd)->vma; 913 obj_datasec (abfd)->filepos = pos; 914 pos += obj_datasec (abfd)->size; 915 vma += obj_datasec (abfd)->size; 916 917 /* BSS. */ 918 if (!obj_bsssec (abfd)->user_set_vma) 919 { 920 obj_datasec (abfd)->size += pad; 921 pos += pad; 922 vma += pad; 923 obj_bsssec (abfd)->vma = vma; 924 } 925 else 926 { 927 /* The VMA of the .bss section is set by the VMA of the 928 .data section plus the size of the .data section. We may 929 need to add padding bytes to make this true. */ 930 pad = obj_bsssec (abfd)->vma - vma; 931 if (pad > 0) 932 { 933 obj_datasec (abfd)->size += pad; 934 pos += pad; 935 } 936 } 937 obj_bsssec (abfd)->filepos = pos; 938 939 /* Fix up the exec header. */ 940 execp->a_text = obj_textsec (abfd)->size; 941 execp->a_data = obj_datasec (abfd)->size; 942 execp->a_bss = obj_bsssec (abfd)->size; 943 N_SET_MAGIC (*execp, OMAGIC); 944} 945 946static void 947adjust_z_magic (bfd *abfd, struct internal_exec *execp) 948{ 949 bfd_size_type data_pad, text_pad; 950 file_ptr text_end; 951 const struct aout_backend_data *abdp; 952 /* TRUE if text includes exec header. */ 953 bfd_boolean ztih; 954 955 abdp = aout_backend_info (abfd); 956 957 /* Text. */ 958 ztih = (abdp != NULL 959 && (abdp->text_includes_header 960 || obj_aout_subformat (abfd) == q_magic_format)); 961 obj_textsec (abfd)->filepos = (ztih 962 ? adata (abfd).exec_bytes_size 963 : adata (abfd).zmagic_disk_block_size); 964 if (! obj_textsec (abfd)->user_set_vma) 965 { 966 /* ?? Do we really need to check for relocs here? */ 967 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 968 ? 0 969 : (ztih 970 ? (abdp->default_text_vma 971 + adata (abfd).exec_bytes_size) 972 : abdp->default_text_vma)); 973 text_pad = 0; 974 } 975 else 976 { 977 /* The .text section is being loaded at an unusual address. We 978 may need to pad it such that the .data section starts at a page 979 boundary. */ 980 if (ztih) 981 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 982 & (adata (abfd).page_size - 1)); 983 else 984 text_pad = ((- obj_textsec (abfd)->vma) 985 & (adata (abfd).page_size - 1)); 986 } 987 988 /* Find start of data. */ 989 if (ztih) 990 { 991 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; 992 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 993 } 994 else 995 { 996 /* Note that if page_size == zmagic_disk_block_size, then 997 filepos == page_size, and this case is the same as the ztih 998 case. */ 999 text_end = obj_textsec (abfd)->size; 1000 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1001 text_end += obj_textsec (abfd)->filepos; 1002 } 1003 obj_textsec (abfd)->size += text_pad; 1004 text_end += text_pad; 1005 1006 /* Data. */ 1007 if (!obj_datasec (abfd)->user_set_vma) 1008 { 1009 bfd_vma vma; 1010 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size; 1011 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1012 } 1013 if (abdp && abdp->zmagic_mapped_contiguous) 1014 { 1015 asection * text = obj_textsec (abfd); 1016 asection * data = obj_datasec (abfd); 1017 1018 text_pad = data->vma - (text->vma + text->size); 1019 /* Only pad the text section if the data 1020 section is going to be placed after it. */ 1021 if (text_pad > 0) 1022 text->size += text_pad; 1023 } 1024 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1025 + obj_textsec (abfd)->size); 1026 1027 /* Fix up exec header while we're at it. */ 1028 execp->a_text = obj_textsec (abfd)->size; 1029 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1030 execp->a_text += adata (abfd).exec_bytes_size; 1031 if (obj_aout_subformat (abfd) == q_magic_format) 1032 N_SET_MAGIC (*execp, QMAGIC); 1033 else 1034 N_SET_MAGIC (*execp, ZMAGIC); 1035 1036 /* Spec says data section should be rounded up to page boundary. */ 1037 obj_datasec (abfd)->size 1038 = align_power (obj_datasec (abfd)->size, 1039 obj_bsssec (abfd)->alignment_power); 1040 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size, 1041 adata (abfd).page_size); 1042 data_pad = execp->a_data - obj_datasec (abfd)->size; 1043 1044 /* BSS. */ 1045 if (!obj_bsssec (abfd)->user_set_vma) 1046 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1047 + obj_datasec (abfd)->size); 1048 /* If the BSS immediately follows the data section and extra space 1049 in the page is left after the data section, fudge data 1050 in the header so that the bss section looks smaller by that 1051 amount. We'll start the bss section there, and lie to the OS. 1052 (Note that a linker script, as well as the above assignment, 1053 could have explicitly set the BSS vma to immediately follow 1054 the data section.) */ 1055 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1056 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size) 1057 execp->a_bss = (data_pad > obj_bsssec (abfd)->size 1058 ? 0 : obj_bsssec (abfd)->size - data_pad); 1059 else 1060 execp->a_bss = obj_bsssec (abfd)->size; 1061} 1062 1063static void 1064adjust_n_magic (bfd *abfd, struct internal_exec *execp) 1065{ 1066 file_ptr pos = adata (abfd).exec_bytes_size; 1067 bfd_vma vma = 0; 1068 int pad; 1069 1070 /* Text. */ 1071 obj_textsec (abfd)->filepos = pos; 1072 if (!obj_textsec (abfd)->user_set_vma) 1073 obj_textsec (abfd)->vma = vma; 1074 else 1075 vma = obj_textsec (abfd)->vma; 1076 pos += obj_textsec (abfd)->size; 1077 vma += obj_textsec (abfd)->size; 1078 1079 /* Data. */ 1080 obj_datasec (abfd)->filepos = pos; 1081 if (!obj_datasec (abfd)->user_set_vma) 1082 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1083 vma = obj_datasec (abfd)->vma; 1084 1085 /* Since BSS follows data immediately, see if it needs alignment. */ 1086 vma += obj_datasec (abfd)->size; 1087 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1088 obj_datasec (abfd)->size += pad; 1089 pos += obj_datasec (abfd)->size; 1090 1091 /* BSS. */ 1092 if (!obj_bsssec (abfd)->user_set_vma) 1093 obj_bsssec (abfd)->vma = vma; 1094 else 1095 vma = obj_bsssec (abfd)->vma; 1096 1097 /* Fix up exec header. */ 1098 execp->a_text = obj_textsec (abfd)->size; 1099 execp->a_data = obj_datasec (abfd)->size; 1100 execp->a_bss = obj_bsssec (abfd)->size; 1101 N_SET_MAGIC (*execp, NMAGIC); 1102} 1103 1104bfd_boolean 1105NAME (aout, adjust_sizes_and_vmas) (bfd *abfd, 1106 bfd_size_type *text_size, 1107 file_ptr *text_end ATTRIBUTE_UNUSED) 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 *text_size = obj_textsec (abfd)->size; 1122 /* Rule (heuristic) for when to pad to a new page. Note that there 1123 are (at least) two ways demand-paged (ZMAGIC) files have been 1124 handled. Most Berkeley-based systems start the text segment at 1125 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1126 segment right after the exec header; the latter is counted in the 1127 text segment size, and is paged in by the kernel with the rest of 1128 the text. */ 1129 1130 /* This perhaps isn't the right way to do this, but made it simpler for me 1131 to understand enough to implement it. Better would probably be to go 1132 right from BFD flags to alignment/positioning characteristics. But the 1133 old code was sloppy enough about handling the flags, and had enough 1134 other magic, that it was a little hard for me to understand. I think 1135 I understand it better now, but I haven't time to do the cleanup this 1136 minute. */ 1137 1138 if (abfd->flags & D_PAGED) 1139 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1140 adata (abfd).magic = z_magic; 1141 else if (abfd->flags & WP_TEXT) 1142 adata (abfd).magic = n_magic; 1143 else 1144 adata (abfd).magic = o_magic; 1145 1146#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1147#if __GNUC__ >= 2 1148 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1149 ({ char *str; 1150 switch (adata (abfd).magic) 1151 { 1152 case n_magic: str = "NMAGIC"; break; 1153 case o_magic: str = "OMAGIC"; break; 1154 case z_magic: str = "ZMAGIC"; break; 1155 default: abort (); 1156 } 1157 str; 1158 }), 1159 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1160 obj_textsec (abfd)->alignment_power, 1161 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1162 obj_datasec (abfd)->alignment_power, 1163 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size, 1164 obj_bsssec (abfd)->alignment_power); 1165#endif 1166#endif 1167 1168 switch (adata (abfd).magic) 1169 { 1170 case o_magic: 1171 adjust_o_magic (abfd, execp); 1172 break; 1173 case z_magic: 1174 adjust_z_magic (abfd, execp); 1175 break; 1176 case n_magic: 1177 adjust_n_magic (abfd, execp); 1178 break; 1179 default: 1180 abort (); 1181 } 1182 1183#ifdef BFD_AOUT_DEBUG 1184 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1185 obj_textsec (abfd)->vma, obj_textsec (abfd)->size, 1186 obj_textsec (abfd)->filepos, 1187 obj_datasec (abfd)->vma, obj_datasec (abfd)->size, 1188 obj_datasec (abfd)->filepos, 1189 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size); 1190#endif 1191 1192 return TRUE; 1193} 1194 1195/* 1196FUNCTION 1197 aout_@var{size}_new_section_hook 1198 1199SYNOPSIS 1200 bfd_boolean aout_@var{size}_new_section_hook, 1201 (bfd *abfd, 1202 asection *newsect); 1203 1204DESCRIPTION 1205 Called by the BFD in response to a @code{bfd_make_section} 1206 request. 1207*/ 1208bfd_boolean 1209NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) 1210{ 1211 /* Align to double at least. */ 1212 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power; 1213 1214 if (bfd_get_format (abfd) == bfd_object) 1215 { 1216 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text")) 1217 { 1218 obj_textsec (abfd)= newsect; 1219 newsect->target_index = N_TEXT; 1220 } 1221 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data")) 1222 { 1223 obj_datasec (abfd) = newsect; 1224 newsect->target_index = N_DATA; 1225 } 1226 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss")) 1227 { 1228 obj_bsssec (abfd) = newsect; 1229 newsect->target_index = N_BSS; 1230 } 1231 } 1232 1233 /* We allow more than three sections internally. */ 1234 return _bfd_generic_new_section_hook (abfd, newsect); 1235} 1236 1237bfd_boolean 1238NAME (aout, set_section_contents) (bfd *abfd, 1239 sec_ptr section, 1240 const void * location, 1241 file_ptr offset, 1242 bfd_size_type count) 1243{ 1244 file_ptr text_end; 1245 bfd_size_type text_size; 1246 1247 if (! abfd->output_has_begun) 1248 { 1249 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 1250 return FALSE; 1251 } 1252 1253 if (section == obj_bsssec (abfd)) 1254 { 1255 bfd_set_error (bfd_error_no_contents); 1256 return FALSE; 1257 } 1258 1259 if (section != obj_textsec (abfd) 1260 && section != obj_datasec (abfd)) 1261 { 1262 if (aout_section_merge_with_text_p (abfd, section)) 1263 section->filepos = obj_textsec (abfd)->filepos + 1264 (section->vma - obj_textsec (abfd)->vma); 1265 else 1266 { 1267 (*_bfd_error_handler) 1268 (_("%s: can not represent section `%s' in a.out object file format"), 1269 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1270 bfd_set_error (bfd_error_nonrepresentable_section); 1271 return FALSE; 1272 } 1273 } 1274 1275 if (count != 0) 1276 { 1277 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1278 || bfd_bwrite (location, count, abfd) != count) 1279 return FALSE; 1280 } 1281 1282 return TRUE; 1283} 1284 1285/* Read the external symbols from an a.out file. */ 1286 1287static bfd_boolean 1288aout_get_external_symbols (bfd *abfd) 1289{ 1290 if (obj_aout_external_syms (abfd) == NULL) 1291 { 1292 bfd_size_type count; 1293 struct external_nlist *syms; 1294 bfd_size_type amt; 1295 1296 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; 1297 if (count == 0) 1298 return TRUE; /* Nothing to do. */ 1299 1300#ifdef USE_MMAP 1301 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), 1302 exec_hdr (abfd)->a_syms, 1303 &obj_aout_sym_window (abfd), TRUE)) 1304 return FALSE; 1305 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1306#else 1307 /* We allocate using malloc to make the values easy to free 1308 later on. If we put them on the objalloc it might not be 1309 possible to free them. */ 1310 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE); 1311 if (syms == NULL) 1312 return FALSE; 1313 1314 amt = exec_hdr (abfd)->a_syms; 1315 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1316 || bfd_bread (syms, amt, abfd) != amt) 1317 { 1318 free (syms); 1319 return FALSE; 1320 } 1321#endif 1322 1323 obj_aout_external_syms (abfd) = syms; 1324 obj_aout_external_sym_count (abfd) = count; 1325 } 1326 1327 if (obj_aout_external_strings (abfd) == NULL 1328 && exec_hdr (abfd)->a_syms != 0) 1329 { 1330 unsigned char string_chars[BYTES_IN_WORD]; 1331 bfd_size_type stringsize; 1332 char *strings; 1333 bfd_size_type amt = BYTES_IN_WORD; 1334 1335 /* Get the size of the strings. */ 1336 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1337 || bfd_bread ((void *) string_chars, amt, abfd) != amt) 1338 return FALSE; 1339 stringsize = GET_WORD (abfd, string_chars); 1340 1341#ifdef USE_MMAP 1342 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1343 &obj_aout_string_window (abfd), TRUE)) 1344 return FALSE; 1345 strings = (char *) obj_aout_string_window (abfd).data; 1346#else 1347 strings = bfd_malloc (stringsize + 1); 1348 if (strings == NULL) 1349 return FALSE; 1350 1351 /* Skip space for the string count in the buffer for convenience 1352 when using indexes. */ 1353 amt = stringsize - BYTES_IN_WORD; 1354 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1355 { 1356 free (strings); 1357 return FALSE; 1358 } 1359#endif 1360 1361 /* Ensure that a zero index yields an empty string. */ 1362 strings[0] = '\0'; 1363 1364 strings[stringsize - 1] = 0; 1365 1366 obj_aout_external_strings (abfd) = strings; 1367 obj_aout_external_string_size (abfd) = stringsize; 1368 } 1369 1370 return TRUE; 1371} 1372 1373/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1374 and symbol->value fields of CACHE_PTR will be set from the a.out 1375 nlist structure. This function is responsible for setting 1376 symbol->flags and symbol->section, and adjusting symbol->value. */ 1377 1378static bfd_boolean 1379translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr) 1380{ 1381 flagword visible; 1382 1383 if ((cache_ptr->type & N_STAB) != 0 1384 || cache_ptr->type == N_FN) 1385 { 1386 asection *sec; 1387 1388 /* This is a debugging symbol. */ 1389 cache_ptr->symbol.flags = BSF_DEBUGGING; 1390 1391 /* Work out the symbol section. */ 1392 switch (cache_ptr->type & N_TYPE) 1393 { 1394 case N_TEXT: 1395 case N_FN: 1396 sec = obj_textsec (abfd); 1397 break; 1398 case N_DATA: 1399 sec = obj_datasec (abfd); 1400 break; 1401 case N_BSS: 1402 sec = obj_bsssec (abfd); 1403 break; 1404 default: 1405 case N_ABS: 1406 sec = bfd_abs_section_ptr; 1407 break; 1408 } 1409 1410 cache_ptr->symbol.section = sec; 1411 cache_ptr->symbol.value -= sec->vma; 1412 1413 return TRUE; 1414 } 1415 1416 /* Get the default visibility. This does not apply to all types, so 1417 we just hold it in a local variable to use if wanted. */ 1418 if ((cache_ptr->type & N_EXT) == 0) 1419 visible = BSF_LOCAL; 1420 else 1421 visible = BSF_GLOBAL; 1422 1423 switch (cache_ptr->type) 1424 { 1425 default: 1426 case N_ABS: case N_ABS | N_EXT: 1427 cache_ptr->symbol.section = bfd_abs_section_ptr; 1428 cache_ptr->symbol.flags = visible; 1429 break; 1430 1431 case N_UNDF | N_EXT: 1432 if (cache_ptr->symbol.value != 0) 1433 { 1434 /* This is a common symbol. */ 1435 cache_ptr->symbol.flags = BSF_GLOBAL; 1436 cache_ptr->symbol.section = bfd_com_section_ptr; 1437 } 1438 else 1439 { 1440 cache_ptr->symbol.flags = 0; 1441 cache_ptr->symbol.section = bfd_und_section_ptr; 1442 } 1443 break; 1444 1445 case N_TEXT: case N_TEXT | N_EXT: 1446 cache_ptr->symbol.section = obj_textsec (abfd); 1447 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1448 cache_ptr->symbol.flags = visible; 1449 break; 1450 1451 /* N_SETV symbols used to represent set vectors placed in the 1452 data section. They are no longer generated. Theoretically, 1453 it was possible to extract the entries and combine them with 1454 new ones, although I don't know if that was ever actually 1455 done. Unless that feature is restored, treat them as data 1456 symbols. */ 1457 case N_SETV: case N_SETV | N_EXT: 1458 case N_DATA: case N_DATA | N_EXT: 1459 cache_ptr->symbol.section = obj_datasec (abfd); 1460 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1461 cache_ptr->symbol.flags = visible; 1462 break; 1463 1464 case N_BSS: case N_BSS | N_EXT: 1465 cache_ptr->symbol.section = obj_bsssec (abfd); 1466 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1467 cache_ptr->symbol.flags = visible; 1468 break; 1469 1470 case N_SETA: case N_SETA | N_EXT: 1471 case N_SETT: case N_SETT | N_EXT: 1472 case N_SETD: case N_SETD | N_EXT: 1473 case N_SETB: case N_SETB | N_EXT: 1474 { 1475 /* This code is no longer needed. It used to be used to make 1476 the linker handle set symbols, but they are now handled in 1477 the add_symbols routine instead. */ 1478 switch (cache_ptr->type & N_TYPE) 1479 { 1480 case N_SETA: 1481 cache_ptr->symbol.section = bfd_abs_section_ptr; 1482 break; 1483 case N_SETT: 1484 cache_ptr->symbol.section = obj_textsec (abfd); 1485 break; 1486 case N_SETD: 1487 cache_ptr->symbol.section = obj_datasec (abfd); 1488 break; 1489 case N_SETB: 1490 cache_ptr->symbol.section = obj_bsssec (abfd); 1491 break; 1492 } 1493 1494 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1495 } 1496 break; 1497 1498 case N_WARNING: 1499 /* This symbol is the text of a warning message. The next 1500 symbol is the symbol to associate the warning with. If a 1501 reference is made to that symbol, a warning is issued. */ 1502 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1503 cache_ptr->symbol.section = bfd_abs_section_ptr; 1504 break; 1505 1506 case N_INDR: case N_INDR | N_EXT: 1507 /* An indirect symbol. This consists of two symbols in a row. 1508 The first symbol is the name of the indirection. The second 1509 symbol is the name of the target. A reference to the first 1510 symbol becomes a reference to the second. */ 1511 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1512 cache_ptr->symbol.section = bfd_ind_section_ptr; 1513 break; 1514 1515 case N_WEAKU: 1516 cache_ptr->symbol.section = bfd_und_section_ptr; 1517 cache_ptr->symbol.flags = BSF_WEAK; 1518 break; 1519 1520 case N_WEAKA: 1521 cache_ptr->symbol.section = bfd_abs_section_ptr; 1522 cache_ptr->symbol.flags = BSF_WEAK; 1523 break; 1524 1525 case N_WEAKT: 1526 cache_ptr->symbol.section = obj_textsec (abfd); 1527 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1528 cache_ptr->symbol.flags = BSF_WEAK; 1529 break; 1530 1531 case N_WEAKD: 1532 cache_ptr->symbol.section = obj_datasec (abfd); 1533 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1534 cache_ptr->symbol.flags = BSF_WEAK; 1535 break; 1536 1537 case N_WEAKB: 1538 cache_ptr->symbol.section = obj_bsssec (abfd); 1539 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1540 cache_ptr->symbol.flags = BSF_WEAK; 1541 break; 1542 } 1543 1544 return TRUE; 1545} 1546 1547/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1548 1549static bfd_boolean 1550translate_to_native_sym_flags (bfd *abfd, 1551 asymbol *cache_ptr, 1552 struct external_nlist *sym_pointer) 1553{ 1554 bfd_vma value = cache_ptr->value; 1555 asection *sec; 1556 bfd_vma off; 1557 1558 /* Mask out any existing type bits in case copying from one section 1559 to another. */ 1560 sym_pointer->e_type[0] &= ~N_TYPE; 1561 1562 sec = bfd_get_section (cache_ptr); 1563 off = 0; 1564 1565 if (sec == NULL) 1566 { 1567 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1568 file. */ 1569 (*_bfd_error_handler) 1570 (_("%s: can not represent section for symbol `%s' in a.out object file format"), 1571 bfd_get_filename (abfd), 1572 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1573 bfd_set_error (bfd_error_nonrepresentable_section); 1574 return FALSE; 1575 } 1576 1577 if (sec->output_section != NULL) 1578 { 1579 off = sec->output_offset; 1580 sec = sec->output_section; 1581 } 1582 1583 if (bfd_is_abs_section (sec)) 1584 sym_pointer->e_type[0] |= N_ABS; 1585 else if (sec == obj_textsec (abfd)) 1586 sym_pointer->e_type[0] |= N_TEXT; 1587 else if (sec == obj_datasec (abfd)) 1588 sym_pointer->e_type[0] |= N_DATA; 1589 else if (sec == obj_bsssec (abfd)) 1590 sym_pointer->e_type[0] |= N_BSS; 1591 else if (bfd_is_und_section (sec)) 1592 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1593 else if (bfd_is_ind_section (sec)) 1594 sym_pointer->e_type[0] = N_INDR; 1595 else if (bfd_is_com_section (sec)) 1596 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1597 else 1598 { 1599 if (aout_section_merge_with_text_p (abfd, sec)) 1600 sym_pointer->e_type[0] |= N_TEXT; 1601 else 1602 { 1603 (*_bfd_error_handler) 1604 (_("%s: can not represent section `%s' in a.out object file format"), 1605 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1606 bfd_set_error (bfd_error_nonrepresentable_section); 1607 return FALSE; 1608 } 1609 } 1610 1611 /* Turn the symbol from section relative to absolute again. */ 1612 value += sec->vma + off; 1613 1614 if ((cache_ptr->flags & BSF_WARNING) != 0) 1615 sym_pointer->e_type[0] = N_WARNING; 1616 1617 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1618 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1619 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1620 sym_pointer->e_type[0] |= N_EXT; 1621 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1622 sym_pointer->e_type[0] &= ~N_EXT; 1623 1624 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1625 { 1626 int type = ((aout_symbol_type *) cache_ptr)->type; 1627 1628 switch (type) 1629 { 1630 case N_ABS: type = N_SETA; break; 1631 case N_TEXT: type = N_SETT; break; 1632 case N_DATA: type = N_SETD; break; 1633 case N_BSS: type = N_SETB; break; 1634 } 1635 sym_pointer->e_type[0] = type; 1636 } 1637 1638 if ((cache_ptr->flags & BSF_WEAK) != 0) 1639 { 1640 int type; 1641 1642 switch (sym_pointer->e_type[0] & N_TYPE) 1643 { 1644 default: 1645 case N_ABS: type = N_WEAKA; break; 1646 case N_TEXT: type = N_WEAKT; break; 1647 case N_DATA: type = N_WEAKD; break; 1648 case N_BSS: type = N_WEAKB; break; 1649 case N_UNDF: type = N_WEAKU; break; 1650 } 1651 sym_pointer->e_type[0] = type; 1652 } 1653 1654 PUT_WORD (abfd, value, sym_pointer->e_value); 1655 1656 return TRUE; 1657} 1658 1659/* Native-level interface to symbols. */ 1660 1661asymbol * 1662NAME (aout, make_empty_symbol) (bfd *abfd) 1663{ 1664 bfd_size_type amt = sizeof (aout_symbol_type); 1665 1666 aout_symbol_type *new = bfd_zalloc (abfd, amt); 1667 if (!new) 1668 return NULL; 1669 new->symbol.the_bfd = abfd; 1670 1671 return &new->symbol; 1672} 1673 1674/* Translate a set of internal symbols into external symbols. */ 1675 1676bfd_boolean 1677NAME (aout, translate_symbol_table) (bfd *abfd, 1678 aout_symbol_type *in, 1679 struct external_nlist *ext, 1680 bfd_size_type count, 1681 char *str, 1682 bfd_size_type strsize, 1683 bfd_boolean dynamic) 1684{ 1685 struct external_nlist *ext_end; 1686 1687 ext_end = ext + count; 1688 for (; ext < ext_end; ext++, in++) 1689 { 1690 bfd_vma x; 1691 1692 x = GET_WORD (abfd, ext->e_strx); 1693 in->symbol.the_bfd = abfd; 1694 1695 /* For the normal symbols, the zero index points at the number 1696 of bytes in the string table but is to be interpreted as the 1697 null string. For the dynamic symbols, the number of bytes in 1698 the string table is stored in the __DYNAMIC structure and the 1699 zero index points at an actual string. */ 1700 if (x == 0 && ! dynamic) 1701 in->symbol.name = ""; 1702 else if (x < strsize) 1703 in->symbol.name = str + x; 1704 else 1705 return FALSE; 1706 1707 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1708 in->desc = H_GET_16 (abfd, ext->e_desc); 1709 in->other = H_GET_8 (abfd, ext->e_other); 1710 in->type = H_GET_8 (abfd, ext->e_type); 1711 in->symbol.udata.p = NULL; 1712 1713 if (! translate_from_native_sym_flags (abfd, in)) 1714 return FALSE; 1715 1716 if (dynamic) 1717 in->symbol.flags |= BSF_DYNAMIC; 1718 } 1719 1720 return TRUE; 1721} 1722 1723/* We read the symbols into a buffer, which is discarded when this 1724 function exits. We read the strings into a buffer large enough to 1725 hold them all plus all the cached symbol entries. */ 1726 1727bfd_boolean 1728NAME (aout, slurp_symbol_table) (bfd *abfd) 1729{ 1730 struct external_nlist *old_external_syms; 1731 aout_symbol_type *cached; 1732 bfd_size_type cached_size; 1733 1734 /* If there's no work to be done, don't do any. */ 1735 if (obj_aout_symbols (abfd) != NULL) 1736 return TRUE; 1737 1738 old_external_syms = obj_aout_external_syms (abfd); 1739 1740 if (! aout_get_external_symbols (abfd)) 1741 return FALSE; 1742 1743 cached_size = obj_aout_external_sym_count (abfd); 1744 if (cached_size == 0) 1745 return TRUE; /* Nothing to do. */ 1746 1747 cached_size *= sizeof (aout_symbol_type); 1748 cached = bfd_zmalloc (cached_size); 1749 if (cached == NULL) 1750 return FALSE; 1751 1752 /* Convert from external symbol information to internal. */ 1753 if (! (NAME (aout, translate_symbol_table) 1754 (abfd, cached, 1755 obj_aout_external_syms (abfd), 1756 obj_aout_external_sym_count (abfd), 1757 obj_aout_external_strings (abfd), 1758 obj_aout_external_string_size (abfd), 1759 FALSE))) 1760 { 1761 free (cached); 1762 return FALSE; 1763 } 1764 1765 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1766 1767 obj_aout_symbols (abfd) = cached; 1768 1769 /* It is very likely that anybody who calls this function will not 1770 want the external symbol information, so if it was allocated 1771 because of our call to aout_get_external_symbols, we free it up 1772 right away to save space. */ 1773 if (old_external_syms == NULL 1774 && obj_aout_external_syms (abfd) != NULL) 1775 { 1776#ifdef USE_MMAP 1777 bfd_free_window (&obj_aout_sym_window (abfd)); 1778#else 1779 free (obj_aout_external_syms (abfd)); 1780#endif 1781 obj_aout_external_syms (abfd) = NULL; 1782 } 1783 1784 return TRUE; 1785} 1786 1787/* We use a hash table when writing out symbols so that we only write 1788 out a particular string once. This helps particularly when the 1789 linker writes out stabs debugging entries, because each different 1790 contributing object file tends to have many duplicate stabs 1791 strings. 1792 1793 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1794 if BFD_TRADITIONAL_FORMAT is set. */ 1795 1796/* Get the index of a string in a strtab, adding it if it is not 1797 already present. */ 1798 1799static inline bfd_size_type 1800add_to_stringtab (bfd *abfd, 1801 struct bfd_strtab_hash *tab, 1802 const char *str, 1803 bfd_boolean copy) 1804{ 1805 bfd_boolean hash; 1806 bfd_size_type index; 1807 1808 /* An index of 0 always means the empty string. */ 1809 if (str == 0 || *str == '\0') 1810 return 0; 1811 1812 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1813 doesn't understand a hashed string table. */ 1814 hash = TRUE; 1815 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1816 hash = FALSE; 1817 1818 index = _bfd_stringtab_add (tab, str, hash, copy); 1819 1820 if (index != (bfd_size_type) -1) 1821 /* Add BYTES_IN_WORD to the return value to account for the 1822 space taken up by the string table size. */ 1823 index += BYTES_IN_WORD; 1824 1825 return index; 1826} 1827 1828/* Write out a strtab. ABFD is already at the right location in the 1829 file. */ 1830 1831static bfd_boolean 1832emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) 1833{ 1834 bfd_byte buffer[BYTES_IN_WORD]; 1835 bfd_size_type amt = BYTES_IN_WORD; 1836 1837 /* The string table starts with the size. */ 1838 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1839 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt) 1840 return FALSE; 1841 1842 return _bfd_stringtab_emit (abfd, tab); 1843} 1844 1845bfd_boolean 1846NAME (aout, write_syms) (bfd *abfd) 1847{ 1848 unsigned int count ; 1849 asymbol **generic = bfd_get_outsymbols (abfd); 1850 struct bfd_strtab_hash *strtab; 1851 1852 strtab = _bfd_stringtab_init (); 1853 if (strtab == NULL) 1854 return FALSE; 1855 1856 for (count = 0; count < bfd_get_symcount (abfd); count++) 1857 { 1858 asymbol *g = generic[count]; 1859 bfd_size_type indx; 1860 struct external_nlist nsp; 1861 bfd_size_type amt; 1862 1863 indx = add_to_stringtab (abfd, strtab, g->name, FALSE); 1864 if (indx == (bfd_size_type) -1) 1865 goto error_return; 1866 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1867 1868 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1869 { 1870 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1871 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1872 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1873 } 1874 else 1875 { 1876 H_PUT_16 (abfd, 0, nsp.e_desc); 1877 H_PUT_8 (abfd, 0, nsp.e_other); 1878 H_PUT_8 (abfd, 0, nsp.e_type); 1879 } 1880 1881 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1882 goto error_return; 1883 1884 amt = EXTERNAL_NLIST_SIZE; 1885 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt) 1886 goto error_return; 1887 1888 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1889 here, at the end. */ 1890 g->KEEPIT = count; 1891 } 1892 1893 if (! emit_stringtab (abfd, strtab)) 1894 goto error_return; 1895 1896 _bfd_stringtab_free (strtab); 1897 1898 return TRUE; 1899 1900error_return: 1901 _bfd_stringtab_free (strtab); 1902 return FALSE; 1903} 1904 1905long 1906NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) 1907{ 1908 unsigned int counter = 0; 1909 aout_symbol_type *symbase; 1910 1911 if (!NAME (aout, slurp_symbol_table) (abfd)) 1912 return -1; 1913 1914 for (symbase = obj_aout_symbols (abfd); 1915 counter++ < bfd_get_symcount (abfd); 1916 ) 1917 *(location++) = (asymbol *) (symbase++); 1918 *location++ =0; 1919 return bfd_get_symcount (abfd); 1920} 1921 1922/* Standard reloc stuff. */ 1923/* Output standard relocation information to a file in target byte order. */ 1924 1925extern void NAME (aout, swap_std_reloc_out) 1926 (bfd *, arelent *, struct reloc_std_external *); 1927 1928void 1929NAME (aout, swap_std_reloc_out) (bfd *abfd, 1930 arelent *g, 1931 struct reloc_std_external *natptr) 1932{ 1933 int r_index; 1934 asymbol *sym = *(g->sym_ptr_ptr); 1935 int r_extern; 1936 unsigned int r_length; 1937 int r_pcrel; 1938 int r_baserel, r_jmptable, r_relative; 1939 asection *output_section = sym->section->output_section; 1940 1941 PUT_WORD (abfd, g->address, natptr->r_address); 1942 1943 r_length = g->howto->size ; /* Size as a power of two. */ 1944 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 1945 /* XXX This relies on relocs coming from a.out files. */ 1946 r_baserel = (g->howto->type & 8) != 0; 1947 r_jmptable = (g->howto->type & 16) != 0; 1948 r_relative = (g->howto->type & 32) != 0; 1949 1950 /* Name was clobbered by aout_write_syms to be symbol index. */ 1951 1952 /* If this relocation is relative to a symbol then set the 1953 r_index to the symbols index, and the r_extern bit. 1954 1955 Absolute symbols can come in in two ways, either as an offset 1956 from the abs section, or as a symbol which has an abs value. 1957 check for that here. */ 1958 1959 if (bfd_is_com_section (output_section) 1960 || bfd_is_abs_section (output_section) 1961 || bfd_is_und_section (output_section) 1962 /* PR gas/3041 a.out relocs against weak symbols 1963 must be treated as if they were against externs. */ 1964 || (sym->flags & BSF_WEAK)) 1965 { 1966 if (bfd_abs_section_ptr->symbol == sym) 1967 { 1968 /* Whoops, looked like an abs symbol, but is 1969 really an offset from the abs section. */ 1970 r_index = N_ABS; 1971 r_extern = 0; 1972 } 1973 else 1974 { 1975 /* Fill in symbol. */ 1976 r_extern = 1; 1977 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 1978 } 1979 } 1980 else 1981 { 1982 /* Just an ordinary section. */ 1983 r_extern = 0; 1984 r_index = output_section->target_index; 1985 } 1986 1987 /* Now the fun stuff. */ 1988 if (bfd_header_big_endian (abfd)) 1989 { 1990 natptr->r_index[0] = r_index >> 16; 1991 natptr->r_index[1] = r_index >> 8; 1992 natptr->r_index[2] = r_index; 1993 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 1994 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 1995 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 1996 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 1997 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 1998 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 1999 } 2000 else 2001 { 2002 natptr->r_index[2] = r_index >> 16; 2003 natptr->r_index[1] = r_index >> 8; 2004 natptr->r_index[0] = r_index; 2005 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2006 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2007 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2008 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2009 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2010 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2011 } 2012} 2013 2014/* Extended stuff. */ 2015/* Output extended relocation information to a file in target byte order. */ 2016 2017extern void NAME (aout, swap_ext_reloc_out) 2018 (bfd *, arelent *, struct reloc_ext_external *); 2019 2020void 2021NAME (aout, swap_ext_reloc_out) (bfd *abfd, 2022 arelent *g, 2023 struct reloc_ext_external *natptr) 2024{ 2025 int r_index; 2026 int r_extern; 2027 unsigned int r_type; 2028 bfd_vma r_addend; 2029 asymbol *sym = *(g->sym_ptr_ptr); 2030 asection *output_section = sym->section->output_section; 2031 2032 PUT_WORD (abfd, g->address, natptr->r_address); 2033 2034 r_type = (unsigned int) g->howto->type; 2035 2036 r_addend = g->addend; 2037 if ((sym->flags & BSF_SECTION_SYM) != 0) 2038 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2039 2040 /* If this relocation is relative to a symbol then set the 2041 r_index to the symbols index, and the r_extern bit. 2042 2043 Absolute symbols can come in in two ways, either as an offset 2044 from the abs section, or as a symbol which has an abs value. 2045 check for that here. */ 2046 if (bfd_is_abs_section (bfd_get_section (sym))) 2047 { 2048 r_extern = 0; 2049 r_index = N_ABS; 2050 } 2051 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2052 { 2053 if (bfd_is_und_section (bfd_get_section (sym)) 2054 || (sym->flags & BSF_GLOBAL) != 0) 2055 r_extern = 1; 2056 else 2057 r_extern = 0; 2058 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2059 } 2060 else 2061 { 2062 /* Just an ordinary section. */ 2063 r_extern = 0; 2064 r_index = output_section->target_index; 2065 } 2066 2067 /* Now the fun stuff. */ 2068 if (bfd_header_big_endian (abfd)) 2069 { 2070 natptr->r_index[0] = r_index >> 16; 2071 natptr->r_index[1] = r_index >> 8; 2072 natptr->r_index[2] = r_index; 2073 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2074 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2075 } 2076 else 2077 { 2078 natptr->r_index[2] = r_index >> 16; 2079 natptr->r_index[1] = r_index >> 8; 2080 natptr->r_index[0] = r_index; 2081 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2082 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2083 } 2084 2085 PUT_WORD (abfd, r_addend, natptr->r_addend); 2086} 2087 2088/* BFD deals internally with all things based from the section they're 2089 in. so, something in 10 bytes into a text section with a base of 2090 50 would have a symbol (.text+10) and know .text vma was 50. 2091 2092 Aout keeps all it's symbols based from zero, so the symbol would 2093 contain 60. This macro subs the base of each section from the value 2094 to give the true offset from the section. */ 2095 2096#define MOVE_ADDRESS(ad) \ 2097 if (r_extern) \ 2098 { \ 2099 /* Undefined symbol. */ \ 2100 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2101 cache_ptr->addend = ad; \ 2102 } \ 2103 else \ 2104 { \ 2105 /* Defined, section relative. Replace symbol with pointer to \ 2106 symbol which points to section. */ \ 2107 switch (r_index) \ 2108 { \ 2109 case N_TEXT: \ 2110 case N_TEXT | N_EXT: \ 2111 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2112 cache_ptr->addend = ad - su->textsec->vma; \ 2113 break; \ 2114 case N_DATA: \ 2115 case N_DATA | N_EXT: \ 2116 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2117 cache_ptr->addend = ad - su->datasec->vma; \ 2118 break; \ 2119 case N_BSS: \ 2120 case N_BSS | N_EXT: \ 2121 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2122 cache_ptr->addend = ad - su->bsssec->vma; \ 2123 break; \ 2124 default: \ 2125 case N_ABS: \ 2126 case N_ABS | N_EXT: \ 2127 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2128 cache_ptr->addend = ad; \ 2129 break; \ 2130 } \ 2131 } 2132 2133void 2134NAME (aout, swap_ext_reloc_in) (bfd *abfd, 2135 struct reloc_ext_external *bytes, 2136 arelent *cache_ptr, 2137 asymbol **symbols, 2138 bfd_size_type symcount) 2139{ 2140 unsigned int r_index; 2141 int r_extern; 2142 unsigned int r_type; 2143 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2144 2145 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2146 2147 /* Now the fun stuff. */ 2148 if (bfd_header_big_endian (abfd)) 2149 { 2150 r_index = (((unsigned int) bytes->r_index[0] << 16) 2151 | ((unsigned int) bytes->r_index[1] << 8) 2152 | bytes->r_index[2]); 2153 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2154 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2155 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2156 } 2157 else 2158 { 2159 r_index = (((unsigned int) bytes->r_index[2] << 16) 2160 | ((unsigned int) bytes->r_index[1] << 8) 2161 | bytes->r_index[0]); 2162 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2163 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2164 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2165 } 2166 2167 if (r_type < TABLE_SIZE (howto_table_ext)) 2168 cache_ptr->howto = howto_table_ext + r_type; 2169 else 2170 cache_ptr->howto = NULL; 2171 2172 /* Base relative relocs are always against the symbol table, 2173 regardless of the setting of r_extern. r_extern just reflects 2174 whether the symbol the reloc is against is local or global. */ 2175 if (r_type == (unsigned int) RELOC_BASE10 2176 || r_type == (unsigned int) RELOC_BASE13 2177 || r_type == (unsigned int) RELOC_BASE22) 2178 r_extern = 1; 2179 2180 if (r_extern && r_index > symcount) 2181 { 2182 /* We could arrange to return an error, but it might be useful 2183 to see the file even if it is bad. */ 2184 r_extern = 0; 2185 r_index = N_ABS; 2186 } 2187 2188 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2189} 2190 2191void 2192NAME (aout, swap_std_reloc_in) (bfd *abfd, 2193 struct reloc_std_external *bytes, 2194 arelent *cache_ptr, 2195 asymbol **symbols, 2196 bfd_size_type symcount) 2197{ 2198 unsigned int r_index; 2199 int r_extern; 2200 unsigned int r_length; 2201 int r_pcrel; 2202 int r_baserel, r_jmptable, r_relative; 2203 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2204 unsigned int howto_idx; 2205 2206 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2207 2208 /* Now the fun stuff. */ 2209 if (bfd_header_big_endian (abfd)) 2210 { 2211 r_index = (((unsigned int) bytes->r_index[0] << 16) 2212 | ((unsigned int) bytes->r_index[1] << 8) 2213 | bytes->r_index[2]); 2214 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2215 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2216 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2217 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2218 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2219 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2220 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2221 } 2222 else 2223 { 2224 r_index = (((unsigned int) bytes->r_index[2] << 16) 2225 | ((unsigned int) bytes->r_index[1] << 8) 2226 | bytes->r_index[0]); 2227 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2228 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2229 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2230 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2231 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2232 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2233 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2234 } 2235 2236 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2237 + 16 * r_jmptable + 32 * r_relative); 2238 if (howto_idx < TABLE_SIZE (howto_table_std)) 2239 { 2240 cache_ptr->howto = howto_table_std + howto_idx; 2241 if (cache_ptr->howto->type == (unsigned int) -1) 2242 cache_ptr->howto = NULL; 2243 } 2244 else 2245 cache_ptr->howto = NULL; 2246 2247 /* Base relative relocs are always against the symbol table, 2248 regardless of the setting of r_extern. r_extern just reflects 2249 whether the symbol the reloc is against is local or global. */ 2250 if (r_baserel) 2251 r_extern = 1; 2252 2253 if (r_extern && r_index > symcount) 2254 { 2255 /* We could arrange to return an error, but it might be useful 2256 to see the file even if it is bad. */ 2257 r_extern = 0; 2258 r_index = N_ABS; 2259 } 2260 2261 MOVE_ADDRESS (0); 2262} 2263 2264/* Read and swap the relocs for a section. */ 2265 2266bfd_boolean 2267NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) 2268{ 2269 bfd_size_type count; 2270 bfd_size_type reloc_size; 2271 void * relocs; 2272 arelent *reloc_cache; 2273 size_t each_size; 2274 unsigned int counter = 0; 2275 arelent *cache_ptr; 2276 bfd_size_type amt; 2277 2278 if (asect->relocation) 2279 return TRUE; 2280 2281 if (asect->flags & SEC_CONSTRUCTOR) 2282 return TRUE; 2283 2284 if (asect == obj_datasec (abfd)) 2285 reloc_size = exec_hdr (abfd)->a_drsize; 2286 else if (asect == obj_textsec (abfd)) 2287 reloc_size = exec_hdr (abfd)->a_trsize; 2288 else if (asect == obj_bsssec (abfd)) 2289 reloc_size = 0; 2290 else 2291 { 2292 bfd_set_error (bfd_error_invalid_operation); 2293 return FALSE; 2294 } 2295 2296 if (reloc_size == 0) 2297 return TRUE; /* Nothing to be done. */ 2298 2299 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2300 return FALSE; 2301 2302 each_size = obj_reloc_entry_size (abfd); 2303 2304 count = reloc_size / each_size; 2305 if (count == 0) 2306 return TRUE; /* Nothing to be done. */ 2307 2308 amt = count * sizeof (arelent); 2309 reloc_cache = bfd_zmalloc (amt); 2310 if (reloc_cache == NULL) 2311 return FALSE; 2312 2313 relocs = bfd_malloc (reloc_size); 2314 if (relocs == NULL) 2315 { 2316 free (reloc_cache); 2317 return FALSE; 2318 } 2319 2320 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2321 { 2322 free (relocs); 2323 free (reloc_cache); 2324 return FALSE; 2325 } 2326 2327 cache_ptr = reloc_cache; 2328 if (each_size == RELOC_EXT_SIZE) 2329 { 2330 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2331 2332 for (; counter < count; counter++, rptr++, cache_ptr++) 2333 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2334 (bfd_size_type) bfd_get_symcount (abfd)); 2335 } 2336 else 2337 { 2338 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2339 2340 for (; counter < count; counter++, rptr++, cache_ptr++) 2341 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2342 (bfd_size_type) bfd_get_symcount (abfd)); 2343 } 2344 2345 free (relocs); 2346 2347 asect->relocation = reloc_cache; 2348 asect->reloc_count = cache_ptr - reloc_cache; 2349 2350 return TRUE; 2351} 2352 2353/* Write out a relocation section into an object file. */ 2354 2355bfd_boolean 2356NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) 2357{ 2358 arelent **generic; 2359 unsigned char *native, *natptr; 2360 size_t each_size; 2361 2362 unsigned int count = section->reloc_count; 2363 bfd_size_type natsize; 2364 2365 if (count == 0 || section->orelocation == NULL) 2366 return TRUE; 2367 2368 each_size = obj_reloc_entry_size (abfd); 2369 natsize = (bfd_size_type) each_size * count; 2370 native = bfd_zalloc (abfd, natsize); 2371 if (!native) 2372 return FALSE; 2373 2374 generic = section->orelocation; 2375 2376 if (each_size == RELOC_EXT_SIZE) 2377 { 2378 for (natptr = native; 2379 count != 0; 2380 --count, natptr += each_size, ++generic) 2381 MY_swap_ext_reloc_out (abfd, *generic, 2382 (struct reloc_ext_external *) natptr); 2383 } 2384 else 2385 { 2386 for (natptr = native; 2387 count != 0; 2388 --count, natptr += each_size, ++generic) 2389 MY_swap_std_reloc_out (abfd, *generic, 2390 (struct reloc_std_external *) natptr); 2391 } 2392 2393 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) 2394 { 2395 bfd_release (abfd, native); 2396 return FALSE; 2397 } 2398 bfd_release (abfd, native); 2399 2400 return TRUE; 2401} 2402 2403/* This is stupid. This function should be a boolean predicate. */ 2404 2405long 2406NAME (aout, canonicalize_reloc) (bfd *abfd, 2407 sec_ptr section, 2408 arelent **relptr, 2409 asymbol **symbols) 2410{ 2411 arelent *tblptr = section->relocation; 2412 unsigned int count; 2413 2414 if (section == obj_bsssec (abfd)) 2415 { 2416 *relptr = NULL; 2417 return 0; 2418 } 2419 2420 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols))) 2421 return -1; 2422 2423 if (section->flags & SEC_CONSTRUCTOR) 2424 { 2425 arelent_chain *chain = section->constructor_chain; 2426 for (count = 0; count < section->reloc_count; count ++) 2427 { 2428 *relptr ++ = &chain->relent; 2429 chain = chain->next; 2430 } 2431 } 2432 else 2433 { 2434 tblptr = section->relocation; 2435 2436 for (count = 0; count++ < section->reloc_count; ) 2437 { 2438 *relptr++ = tblptr++; 2439 } 2440 } 2441 *relptr = 0; 2442 2443 return section->reloc_count; 2444} 2445 2446long 2447NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) 2448{ 2449 if (bfd_get_format (abfd) != bfd_object) 2450 { 2451 bfd_set_error (bfd_error_invalid_operation); 2452 return -1; 2453 } 2454 2455 if (asect->flags & SEC_CONSTRUCTOR) 2456 return sizeof (arelent *) * (asect->reloc_count + 1); 2457 2458 if (asect == obj_datasec (abfd)) 2459 return sizeof (arelent *) 2460 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2461 + 1); 2462 2463 if (asect == obj_textsec (abfd)) 2464 return sizeof (arelent *) 2465 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2466 + 1); 2467 2468 if (asect == obj_bsssec (abfd)) 2469 return sizeof (arelent *); 2470 2471 if (asect == obj_bsssec (abfd)) 2472 return 0; 2473 2474 bfd_set_error (bfd_error_invalid_operation); 2475 return -1; 2476} 2477 2478long 2479NAME (aout, get_symtab_upper_bound) (bfd *abfd) 2480{ 2481 if (!NAME (aout, slurp_symbol_table) (abfd)) 2482 return -1; 2483 2484 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2485} 2486 2487alent * 2488NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2489 asymbol *ignore_symbol ATTRIBUTE_UNUSED) 2490{ 2491 return NULL; 2492} 2493 2494void 2495NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2496 asymbol *symbol, 2497 symbol_info *ret) 2498{ 2499 bfd_symbol_info (symbol, ret); 2500 2501 if (ret->type == '?') 2502 { 2503 int type_code = aout_symbol (symbol)->type & 0xff; 2504 const char *stab_name = bfd_get_stab_name (type_code); 2505 static char buf[10]; 2506 2507 if (stab_name == NULL) 2508 { 2509 sprintf (buf, "(%d)", type_code); 2510 stab_name = buf; 2511 } 2512 ret->type = '-'; 2513 ret->stab_type = type_code; 2514 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2515 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2516 ret->stab_name = stab_name; 2517 } 2518} 2519 2520void 2521NAME (aout, print_symbol) (bfd *abfd, 2522 void * afile, 2523 asymbol *symbol, 2524 bfd_print_symbol_type how) 2525{ 2526 FILE *file = (FILE *)afile; 2527 2528 switch (how) 2529 { 2530 case bfd_print_symbol_name: 2531 if (symbol->name) 2532 fprintf (file,"%s", symbol->name); 2533 break; 2534 case bfd_print_symbol_more: 2535 fprintf (file,"%4x %2x %2x", 2536 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2537 (unsigned) (aout_symbol (symbol)->other & 0xff), 2538 (unsigned) (aout_symbol (symbol)->type)); 2539 break; 2540 case bfd_print_symbol_all: 2541 { 2542 const char *section_name = symbol->section->name; 2543 2544 bfd_print_symbol_vandf (abfd, (void *)file, symbol); 2545 2546 fprintf (file," %-5s %04x %02x %02x", 2547 section_name, 2548 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2549 (unsigned) (aout_symbol (symbol)->other & 0xff), 2550 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2551 if (symbol->name) 2552 fprintf (file," %s", symbol->name); 2553 } 2554 break; 2555 } 2556} 2557 2558/* If we don't have to allocate more than 1MB to hold the generic 2559 symbols, we use the generic minisymbol methord: it's faster, since 2560 it only translates the symbols once, not multiple times. */ 2561#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2562 2563/* Read minisymbols. For minisymbols, we use the unmodified a.out 2564 symbols. The minisymbol_to_symbol function translates these into 2565 BFD asymbol structures. */ 2566 2567long 2568NAME (aout, read_minisymbols) (bfd *abfd, 2569 bfd_boolean dynamic, 2570 void * *minisymsp, 2571 unsigned int *sizep) 2572{ 2573 if (dynamic) 2574 /* We could handle the dynamic symbols here as well, but it's 2575 easier to hand them off. */ 2576 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2577 2578 if (! aout_get_external_symbols (abfd)) 2579 return -1; 2580 2581 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2582 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2583 2584 *minisymsp = (void *) obj_aout_external_syms (abfd); 2585 2586 /* By passing the external symbols back from this routine, we are 2587 giving up control over the memory block. Clear 2588 obj_aout_external_syms, so that we do not try to free it 2589 ourselves. */ 2590 obj_aout_external_syms (abfd) = NULL; 2591 2592 *sizep = EXTERNAL_NLIST_SIZE; 2593 return obj_aout_external_sym_count (abfd); 2594} 2595 2596/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2597 unmodified a.out symbol. The SYM argument is a structure returned 2598 by bfd_make_empty_symbol, which we fill in here. */ 2599 2600asymbol * 2601NAME (aout, minisymbol_to_symbol) (bfd *abfd, 2602 bfd_boolean dynamic, 2603 const void * minisym, 2604 asymbol *sym) 2605{ 2606 if (dynamic 2607 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2608 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2609 2610 memset (sym, 0, sizeof (aout_symbol_type)); 2611 2612 /* We call translate_symbol_table to translate a single symbol. */ 2613 if (! (NAME (aout, translate_symbol_table) 2614 (abfd, 2615 (aout_symbol_type *) sym, 2616 (struct external_nlist *) minisym, 2617 (bfd_size_type) 1, 2618 obj_aout_external_strings (abfd), 2619 obj_aout_external_string_size (abfd), 2620 FALSE))) 2621 return NULL; 2622 2623 return sym; 2624} 2625 2626/* Provided a BFD, a section and an offset into the section, calculate 2627 and return the name of the source file and the line nearest to the 2628 wanted location. */ 2629 2630bfd_boolean 2631NAME (aout, find_nearest_line) (bfd *abfd, 2632 asection *section, 2633 asymbol **symbols, 2634 bfd_vma offset, 2635 const char **filename_ptr, 2636 const char **functionname_ptr, 2637 unsigned int *line_ptr) 2638{ 2639 /* Run down the file looking for the filename, function and linenumber. */ 2640 asymbol **p; 2641 const char *directory_name = NULL; 2642 const char *main_file_name = NULL; 2643 const char *current_file_name = NULL; 2644 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2645 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2646 bfd_vma low_line_vma = 0; 2647 bfd_vma low_func_vma = 0; 2648 asymbol *func = 0; 2649 bfd_size_type filelen, funclen; 2650 char *buf; 2651 2652 *filename_ptr = abfd->filename; 2653 *functionname_ptr = 0; 2654 *line_ptr = 0; 2655 2656 if (symbols != NULL) 2657 { 2658 for (p = symbols; *p; p++) 2659 { 2660 aout_symbol_type *q = (aout_symbol_type *) (*p); 2661 next: 2662 switch (q->type) 2663 { 2664 case N_TEXT: 2665 /* If this looks like a file name symbol, and it comes after 2666 the line number we have found so far, but before the 2667 offset, then we have probably not found the right line 2668 number. */ 2669 if (q->symbol.value <= offset 2670 && ((q->symbol.value > low_line_vma 2671 && (line_file_name != NULL 2672 || *line_ptr != 0)) 2673 || (q->symbol.value > low_func_vma 2674 && func != NULL))) 2675 { 2676 const char *symname; 2677 2678 symname = q->symbol.name; 2679 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2680 { 2681 if (q->symbol.value > low_line_vma) 2682 { 2683 *line_ptr = 0; 2684 line_file_name = NULL; 2685 } 2686 if (q->symbol.value > low_func_vma) 2687 func = NULL; 2688 } 2689 } 2690 break; 2691 2692 case N_SO: 2693 /* If this symbol is less than the offset, but greater than 2694 the line number we have found so far, then we have not 2695 found the right line number. */ 2696 if (q->symbol.value <= offset) 2697 { 2698 if (q->symbol.value > low_line_vma) 2699 { 2700 *line_ptr = 0; 2701 line_file_name = NULL; 2702 } 2703 if (q->symbol.value > low_func_vma) 2704 func = NULL; 2705 } 2706 2707 main_file_name = current_file_name = q->symbol.name; 2708 /* Look ahead to next symbol to check if that too is an N_SO. */ 2709 p++; 2710 if (*p == NULL) 2711 goto done; 2712 q = (aout_symbol_type *) (*p); 2713 if (q->type != (int)N_SO) 2714 goto next; 2715 2716 /* Found a second N_SO First is directory; second is filename. */ 2717 directory_name = current_file_name; 2718 main_file_name = current_file_name = q->symbol.name; 2719 if (obj_textsec (abfd) != section) 2720 goto done; 2721 break; 2722 case N_SOL: 2723 current_file_name = q->symbol.name; 2724 break; 2725 2726 case N_SLINE: 2727 2728 case N_DSLINE: 2729 case N_BSLINE: 2730 /* We'll keep this if it resolves nearer than the one we have 2731 already. */ 2732 if (q->symbol.value >= low_line_vma 2733 && q->symbol.value <= offset) 2734 { 2735 *line_ptr = q->desc; 2736 low_line_vma = q->symbol.value; 2737 line_file_name = current_file_name; 2738 line_directory_name = directory_name; 2739 } 2740 break; 2741 case N_FUN: 2742 { 2743 /* We'll keep this if it is nearer than the one we have already. */ 2744 if (q->symbol.value >= low_func_vma && 2745 q->symbol.value <= offset) 2746 { 2747 low_func_vma = q->symbol.value; 2748 func = (asymbol *)q; 2749 } 2750 else if (q->symbol.value > offset) 2751 goto done; 2752 } 2753 break; 2754 } 2755 } 2756 } 2757 2758 done: 2759 if (*line_ptr != 0) 2760 { 2761 main_file_name = line_file_name; 2762 directory_name = line_directory_name; 2763 } 2764 2765 if (main_file_name == NULL 2766 || IS_ABSOLUTE_PATH (main_file_name) 2767 || directory_name == NULL) 2768 filelen = 0; 2769 else 2770 filelen = strlen (directory_name) + strlen (main_file_name); 2771 2772 if (func == NULL) 2773 funclen = 0; 2774 else 2775 funclen = strlen (bfd_asymbol_name (func)); 2776 2777 if (adata (abfd).line_buf != NULL) 2778 free (adata (abfd).line_buf); 2779 2780 if (filelen + funclen == 0) 2781 adata (abfd).line_buf = buf = NULL; 2782 else 2783 { 2784 buf = bfd_malloc (filelen + funclen + 3); 2785 adata (abfd).line_buf = buf; 2786 if (buf == NULL) 2787 return FALSE; 2788 } 2789 2790 if (main_file_name != NULL) 2791 { 2792 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2793 *filename_ptr = main_file_name; 2794 else 2795 { 2796 sprintf (buf, "%s%s", directory_name, main_file_name); 2797 *filename_ptr = buf; 2798 buf += filelen + 1; 2799 } 2800 } 2801 2802 if (func) 2803 { 2804 const char *function = func->name; 2805 char *colon; 2806 2807 /* The caller expects a symbol name. We actually have a 2808 function name, without the leading underscore. Put the 2809 underscore back in, so that the caller gets a symbol name. */ 2810 if (bfd_get_symbol_leading_char (abfd) == '\0') 2811 strcpy (buf, function); 2812 else 2813 { 2814 buf[0] = bfd_get_symbol_leading_char (abfd); 2815 strcpy (buf + 1, function); 2816 } 2817 /* Have to remove : stuff. */ 2818 colon = strchr (buf, ':'); 2819 if (colon != NULL) 2820 *colon = '\0'; 2821 *functionname_ptr = buf; 2822 } 2823 2824 return TRUE; 2825} 2826 2827int 2828NAME (aout, sizeof_headers) (bfd *abfd, 2829 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2830{ 2831 return adata (abfd).exec_bytes_size; 2832} 2833 2834/* Free all information we have cached for this BFD. We can always 2835 read it again later if we need it. */ 2836 2837bfd_boolean 2838NAME (aout, bfd_free_cached_info) (bfd *abfd) 2839{ 2840 asection *o; 2841 2842 if (bfd_get_format (abfd) != bfd_object 2843 || abfd->tdata.aout_data == NULL) 2844 return TRUE; 2845 2846#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2847 BFCI_FREE (obj_aout_symbols (abfd)); 2848#ifdef USE_MMAP 2849 obj_aout_external_syms (abfd) = 0; 2850 bfd_free_window (&obj_aout_sym_window (abfd)); 2851 bfd_free_window (&obj_aout_string_window (abfd)); 2852 obj_aout_external_strings (abfd) = 0; 2853#else 2854 BFCI_FREE (obj_aout_external_syms (abfd)); 2855 BFCI_FREE (obj_aout_external_strings (abfd)); 2856#endif 2857 for (o = abfd->sections; o != NULL; o = o->next) 2858 BFCI_FREE (o->relocation); 2859#undef BFCI_FREE 2860 2861 return TRUE; 2862} 2863 2864/* a.out link code. */ 2865 2866/* Routine to create an entry in an a.out link hash table. */ 2867 2868struct bfd_hash_entry * 2869NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, 2870 struct bfd_hash_table *table, 2871 const char *string) 2872{ 2873 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2874 2875 /* Allocate the structure if it has not already been allocated by a 2876 subclass. */ 2877 if (ret == NULL) 2878 ret = bfd_hash_allocate (table, sizeof (* ret)); 2879 if (ret == NULL) 2880 return NULL; 2881 2882 /* Call the allocation method of the superclass. */ 2883 ret = ((struct aout_link_hash_entry *) 2884 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2885 table, string)); 2886 if (ret) 2887 { 2888 /* Set local fields. */ 2889 ret->written = FALSE; 2890 ret->indx = -1; 2891 } 2892 2893 return (struct bfd_hash_entry *) ret; 2894} 2895 2896/* Initialize an a.out link hash table. */ 2897 2898bfd_boolean 2899NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, 2900 bfd *abfd, 2901 struct bfd_hash_entry *(*newfunc) 2902 (struct bfd_hash_entry *, struct bfd_hash_table *, 2903 const char *), 2904 unsigned int entsize) 2905{ 2906 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); 2907} 2908 2909/* Create an a.out link hash table. */ 2910 2911struct bfd_link_hash_table * 2912NAME (aout, link_hash_table_create) (bfd *abfd) 2913{ 2914 struct aout_link_hash_table *ret; 2915 bfd_size_type amt = sizeof (* ret); 2916 2917 ret = bfd_malloc (amt); 2918 if (ret == NULL) 2919 return NULL; 2920 2921 if (!NAME (aout, link_hash_table_init) (ret, abfd, 2922 NAME (aout, link_hash_newfunc), 2923 sizeof (struct aout_link_hash_entry))) 2924 { 2925 free (ret); 2926 return NULL; 2927 } 2928 return &ret->root; 2929} 2930 2931/* Add all symbols from an object file to the hash table. */ 2932 2933static bfd_boolean 2934aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) 2935{ 2936 bfd_boolean (*add_one_symbol) 2937 (struct bfd_link_info *, bfd *, const char *, flagword, asection *, 2938 bfd_vma, const char *, bfd_boolean, bfd_boolean, 2939 struct bfd_link_hash_entry **); 2940 struct external_nlist *syms; 2941 bfd_size_type sym_count; 2942 char *strings; 2943 bfd_boolean copy; 2944 struct aout_link_hash_entry **sym_hash; 2945 struct external_nlist *p; 2946 struct external_nlist *pend; 2947 bfd_size_type amt; 2948 2949 syms = obj_aout_external_syms (abfd); 2950 sym_count = obj_aout_external_sym_count (abfd); 2951 strings = obj_aout_external_strings (abfd); 2952 if (info->keep_memory) 2953 copy = FALSE; 2954 else 2955 copy = TRUE; 2956 2957 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 2958 { 2959 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 2960 (abfd, info, &syms, &sym_count, &strings))) 2961 return FALSE; 2962 } 2963 2964 if (sym_count == 0) 2965 return TRUE; /* Nothing to do. */ 2966 2967 /* We keep a list of the linker hash table entries that correspond 2968 to particular symbols. We could just look them up in the hash 2969 table, but keeping the list is more efficient. Perhaps this 2970 should be conditional on info->keep_memory. */ 2971 amt = sym_count * sizeof (struct aout_link_hash_entry *); 2972 sym_hash = bfd_alloc (abfd, amt); 2973 if (sym_hash == NULL) 2974 return FALSE; 2975 obj_aout_sym_hashes (abfd) = sym_hash; 2976 2977 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 2978 if (add_one_symbol == NULL) 2979 add_one_symbol = _bfd_generic_link_add_one_symbol; 2980 2981 p = syms; 2982 pend = p + sym_count; 2983 for (; p < pend; p++, sym_hash++) 2984 { 2985 int type; 2986 const char *name; 2987 bfd_vma value; 2988 asection *section; 2989 flagword flags; 2990 const char *string; 2991 2992 *sym_hash = NULL; 2993 2994 type = H_GET_8 (abfd, p->e_type); 2995 2996 /* Ignore debugging symbols. */ 2997 if ((type & N_STAB) != 0) 2998 continue; 2999 3000 name = strings + GET_WORD (abfd, p->e_strx); 3001 value = GET_WORD (abfd, p->e_value); 3002 flags = BSF_GLOBAL; 3003 string = NULL; 3004 switch (type) 3005 { 3006 default: 3007 abort (); 3008 3009 case N_UNDF: 3010 case N_ABS: 3011 case N_TEXT: 3012 case N_DATA: 3013 case N_BSS: 3014 case N_FN_SEQ: 3015 case N_COMM: 3016 case N_SETV: 3017 case N_FN: 3018 /* Ignore symbols that are not externally visible. */ 3019 continue; 3020 case N_INDR: 3021 /* Ignore local indirect symbol. */ 3022 ++p; 3023 ++sym_hash; 3024 continue; 3025 3026 case N_UNDF | N_EXT: 3027 if (value == 0) 3028 { 3029 section = bfd_und_section_ptr; 3030 flags = 0; 3031 } 3032 else 3033 section = bfd_com_section_ptr; 3034 break; 3035 case N_ABS | N_EXT: 3036 section = bfd_abs_section_ptr; 3037 break; 3038 case N_TEXT | N_EXT: 3039 section = obj_textsec (abfd); 3040 value -= bfd_get_section_vma (abfd, section); 3041 break; 3042 case N_DATA | N_EXT: 3043 case N_SETV | N_EXT: 3044 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3045 translate_from_native_sym_flags. */ 3046 section = obj_datasec (abfd); 3047 value -= bfd_get_section_vma (abfd, section); 3048 break; 3049 case N_BSS | N_EXT: 3050 section = obj_bsssec (abfd); 3051 value -= bfd_get_section_vma (abfd, section); 3052 break; 3053 case N_INDR | N_EXT: 3054 /* An indirect symbol. The next symbol is the symbol 3055 which this one really is. */ 3056 BFD_ASSERT (p + 1 < pend); 3057 ++p; 3058 string = strings + GET_WORD (abfd, p->e_strx); 3059 section = bfd_ind_section_ptr; 3060 flags |= BSF_INDIRECT; 3061 break; 3062 case N_COMM | N_EXT: 3063 section = bfd_com_section_ptr; 3064 break; 3065 case N_SETA: case N_SETA | N_EXT: 3066 section = bfd_abs_section_ptr; 3067 flags |= BSF_CONSTRUCTOR; 3068 break; 3069 case N_SETT: case N_SETT | N_EXT: 3070 section = obj_textsec (abfd); 3071 flags |= BSF_CONSTRUCTOR; 3072 value -= bfd_get_section_vma (abfd, section); 3073 break; 3074 case N_SETD: case N_SETD | N_EXT: 3075 section = obj_datasec (abfd); 3076 flags |= BSF_CONSTRUCTOR; 3077 value -= bfd_get_section_vma (abfd, section); 3078 break; 3079 case N_SETB: case N_SETB | N_EXT: 3080 section = obj_bsssec (abfd); 3081 flags |= BSF_CONSTRUCTOR; 3082 value -= bfd_get_section_vma (abfd, section); 3083 break; 3084 case N_WARNING: 3085 /* A warning symbol. The next symbol is the one to warn 3086 about. If there is no next symbol, just look away. */ 3087 if (p + 1 >= pend) 3088 return TRUE; 3089 ++p; 3090 string = name; 3091 name = strings + GET_WORD (abfd, p->e_strx); 3092 section = bfd_und_section_ptr; 3093 flags |= BSF_WARNING; 3094 break; 3095 case N_WEAKU: 3096 section = bfd_und_section_ptr; 3097 flags = BSF_WEAK; 3098 break; 3099 case N_WEAKA: 3100 section = bfd_abs_section_ptr; 3101 flags = BSF_WEAK; 3102 break; 3103 case N_WEAKT: 3104 section = obj_textsec (abfd); 3105 value -= bfd_get_section_vma (abfd, section); 3106 flags = BSF_WEAK; 3107 break; 3108 case N_WEAKD: 3109 section = obj_datasec (abfd); 3110 value -= bfd_get_section_vma (abfd, section); 3111 flags = BSF_WEAK; 3112 break; 3113 case N_WEAKB: 3114 section = obj_bsssec (abfd); 3115 value -= bfd_get_section_vma (abfd, section); 3116 flags = BSF_WEAK; 3117 break; 3118 } 3119 3120 if (! ((*add_one_symbol) 3121 (info, abfd, name, flags, section, value, string, copy, FALSE, 3122 (struct bfd_link_hash_entry **) sym_hash))) 3123 return FALSE; 3124 3125 /* Restrict the maximum alignment of a common symbol based on 3126 the architecture, since a.out has no way to represent 3127 alignment requirements of a section in a .o file. FIXME: 3128 This isn't quite right: it should use the architecture of the 3129 output file, not the input files. */ 3130 if ((*sym_hash)->root.type == bfd_link_hash_common 3131 && ((*sym_hash)->root.u.c.p->alignment_power > 3132 bfd_get_arch_info (abfd)->section_align_power)) 3133 (*sym_hash)->root.u.c.p->alignment_power = 3134 bfd_get_arch_info (abfd)->section_align_power; 3135 3136 /* If this is a set symbol, and we are not building sets, then 3137 it is possible for the hash entry to not have been set. In 3138 such a case, treat the symbol as not globally defined. */ 3139 if ((*sym_hash)->root.type == bfd_link_hash_new) 3140 { 3141 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3142 *sym_hash = NULL; 3143 } 3144 3145 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3146 ++sym_hash; 3147 } 3148 3149 return TRUE; 3150} 3151 3152/* Free up the internal symbols read from an a.out file. */ 3153 3154static bfd_boolean 3155aout_link_free_symbols (bfd *abfd) 3156{ 3157 if (obj_aout_external_syms (abfd) != NULL) 3158 { 3159#ifdef USE_MMAP 3160 bfd_free_window (&obj_aout_sym_window (abfd)); 3161#else 3162 free ((void *) obj_aout_external_syms (abfd)); 3163#endif 3164 obj_aout_external_syms (abfd) = NULL; 3165 } 3166 if (obj_aout_external_strings (abfd) != NULL) 3167 { 3168#ifdef USE_MMAP 3169 bfd_free_window (&obj_aout_string_window (abfd)); 3170#else 3171 free ((void *) obj_aout_external_strings (abfd)); 3172#endif 3173 obj_aout_external_strings (abfd) = NULL; 3174 } 3175 return TRUE; 3176} 3177 3178/* Add symbols from an a.out object file. */ 3179 3180static bfd_boolean 3181aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) 3182{ 3183 if (! aout_get_external_symbols (abfd)) 3184 return FALSE; 3185 if (! aout_link_add_symbols (abfd, info)) 3186 return FALSE; 3187 if (! info->keep_memory) 3188 { 3189 if (! aout_link_free_symbols (abfd)) 3190 return FALSE; 3191 } 3192 return TRUE; 3193} 3194 3195/* Look through the internal symbols to see if this object file should 3196 be included in the link. We should include this object file if it 3197 defines any symbols which are currently undefined. If this object 3198 file defines a common symbol, then we may adjust the size of the 3199 known symbol but we do not include the object file in the link 3200 (unless there is some other reason to include it). */ 3201 3202static bfd_boolean 3203aout_link_check_ar_symbols (bfd *abfd, 3204 struct bfd_link_info *info, 3205 bfd_boolean *pneeded) 3206{ 3207 struct external_nlist *p; 3208 struct external_nlist *pend; 3209 char *strings; 3210 3211 *pneeded = FALSE; 3212 3213 /* Look through all the symbols. */ 3214 p = obj_aout_external_syms (abfd); 3215 pend = p + obj_aout_external_sym_count (abfd); 3216 strings = obj_aout_external_strings (abfd); 3217 for (; p < pend; p++) 3218 { 3219 int type = H_GET_8 (abfd, p->e_type); 3220 const char *name; 3221 struct bfd_link_hash_entry *h; 3222 3223 /* Ignore symbols that are not externally visible. This is an 3224 optimization only, as we check the type more thoroughly 3225 below. */ 3226 if (((type & N_EXT) == 0 3227 || (type & N_STAB) != 0 3228 || type == N_FN) 3229 && type != N_WEAKA 3230 && type != N_WEAKT 3231 && type != N_WEAKD 3232 && type != N_WEAKB) 3233 { 3234 if (type == N_WARNING 3235 || type == N_INDR) 3236 ++p; 3237 continue; 3238 } 3239 3240 name = strings + GET_WORD (abfd, p->e_strx); 3241 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 3242 3243 /* We are only interested in symbols that are currently 3244 undefined or common. */ 3245 if (h == NULL 3246 || (h->type != bfd_link_hash_undefined 3247 && h->type != bfd_link_hash_common)) 3248 { 3249 if (type == (N_INDR | N_EXT)) 3250 ++p; 3251 continue; 3252 } 3253 3254 if (type == (N_TEXT | N_EXT) 3255 || type == (N_DATA | N_EXT) 3256 || type == (N_BSS | N_EXT) 3257 || type == (N_ABS | N_EXT) 3258 || type == (N_INDR | N_EXT)) 3259 { 3260 /* This object file defines this symbol. We must link it 3261 in. This is true regardless of whether the current 3262 definition of the symbol is undefined or common. 3263 3264 If the current definition is common, we have a case in 3265 which we have already seen an object file including: 3266 int a; 3267 and this object file from the archive includes: 3268 int a = 5; 3269 In such a case, whether to include this object is target 3270 dependant for backward compatibility. 3271 3272 FIXME: The SunOS 4.1.3 linker will pull in the archive 3273 element if the symbol is defined in the .data section, 3274 but not if it is defined in the .text section. That 3275 seems a bit crazy to me, and it has not been implemented 3276 yet. However, it might be correct. */ 3277 if (h->type == bfd_link_hash_common) 3278 { 3279 int skip = 0; 3280 3281 switch (info->common_skip_ar_aymbols) 3282 { 3283 case bfd_link_common_skip_text: 3284 skip = (type == (N_TEXT | N_EXT)); 3285 break; 3286 case bfd_link_common_skip_data: 3287 skip = (type == (N_DATA | N_EXT)); 3288 break; 3289 default: 3290 case bfd_link_common_skip_all: 3291 skip = 1; 3292 break; 3293 } 3294 3295 if (skip) 3296 continue; 3297 } 3298 3299 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3300 return FALSE; 3301 *pneeded = TRUE; 3302 return TRUE; 3303 } 3304 3305 if (type == (N_UNDF | N_EXT)) 3306 { 3307 bfd_vma value; 3308 3309 value = GET_WORD (abfd, p->e_value); 3310 if (value != 0) 3311 { 3312 /* This symbol is common in the object from the archive 3313 file. */ 3314 if (h->type == bfd_link_hash_undefined) 3315 { 3316 bfd *symbfd; 3317 unsigned int power; 3318 3319 symbfd = h->u.undef.abfd; 3320 if (symbfd == NULL) 3321 { 3322 /* This symbol was created as undefined from 3323 outside BFD. We assume that we should link 3324 in the object file. This is done for the -u 3325 option in the linker. */ 3326 if (! (*info->callbacks->add_archive_element) (info, 3327 abfd, 3328 name)) 3329 return FALSE; 3330 *pneeded = TRUE; 3331 return TRUE; 3332 } 3333 /* Turn the current link symbol into a common 3334 symbol. It is already on the undefs list. */ 3335 h->type = bfd_link_hash_common; 3336 h->u.c.p = bfd_hash_allocate (&info->hash->table, 3337 sizeof (struct bfd_link_hash_common_entry)); 3338 if (h->u.c.p == NULL) 3339 return FALSE; 3340 3341 h->u.c.size = value; 3342 3343 /* FIXME: This isn't quite right. The maximum 3344 alignment of a common symbol should be set by the 3345 architecture of the output file, not of the input 3346 file. */ 3347 power = bfd_log2 (value); 3348 if (power > bfd_get_arch_info (abfd)->section_align_power) 3349 power = bfd_get_arch_info (abfd)->section_align_power; 3350 h->u.c.p->alignment_power = power; 3351 3352 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3353 "COMMON"); 3354 } 3355 else 3356 { 3357 /* Adjust the size of the common symbol if 3358 necessary. */ 3359 if (value > h->u.c.size) 3360 h->u.c.size = value; 3361 } 3362 } 3363 } 3364 3365 if (type == N_WEAKA 3366 || type == N_WEAKT 3367 || type == N_WEAKD 3368 || type == N_WEAKB) 3369 { 3370 /* This symbol is weak but defined. We must pull it in if 3371 the current link symbol is undefined, but we don't want 3372 it if the current link symbol is common. */ 3373 if (h->type == bfd_link_hash_undefined) 3374 { 3375 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3376 return FALSE; 3377 *pneeded = TRUE; 3378 return TRUE; 3379 } 3380 } 3381 } 3382 3383 /* We do not need this object file. */ 3384 return TRUE; 3385} 3386/* Check a single archive element to see if we need to include it in 3387 the link. *PNEEDED is set according to whether this element is 3388 needed in the link or not. This is called from 3389 _bfd_generic_link_add_archive_symbols. */ 3390 3391static bfd_boolean 3392aout_link_check_archive_element (bfd *abfd, 3393 struct bfd_link_info *info, 3394 bfd_boolean *pneeded) 3395{ 3396 if (! aout_get_external_symbols (abfd)) 3397 return FALSE; 3398 3399 if (! aout_link_check_ar_symbols (abfd, info, pneeded)) 3400 return FALSE; 3401 3402 if (*pneeded) 3403 { 3404 if (! aout_link_add_symbols (abfd, info)) 3405 return FALSE; 3406 } 3407 3408 if (! info->keep_memory || ! *pneeded) 3409 { 3410 if (! aout_link_free_symbols (abfd)) 3411 return FALSE; 3412 } 3413 3414 return TRUE; 3415} 3416 3417/* Given an a.out BFD, add symbols to the global hash table as 3418 appropriate. */ 3419 3420bfd_boolean 3421NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) 3422{ 3423 switch (bfd_get_format (abfd)) 3424 { 3425 case bfd_object: 3426 return aout_link_add_object_symbols (abfd, info); 3427 case bfd_archive: 3428 return _bfd_generic_link_add_archive_symbols 3429 (abfd, info, aout_link_check_archive_element); 3430 default: 3431 bfd_set_error (bfd_error_wrong_format); 3432 return FALSE; 3433 } 3434} 3435 3436/* A hash table used for header files with N_BINCL entries. */ 3437 3438struct aout_link_includes_table 3439{ 3440 struct bfd_hash_table root; 3441}; 3442 3443/* A linked list of totals that we have found for a particular header 3444 file. */ 3445 3446struct aout_link_includes_totals 3447{ 3448 struct aout_link_includes_totals *next; 3449 bfd_vma total; 3450}; 3451 3452/* An entry in the header file hash table. */ 3453 3454struct aout_link_includes_entry 3455{ 3456 struct bfd_hash_entry root; 3457 /* List of totals we have found for this file. */ 3458 struct aout_link_includes_totals *totals; 3459}; 3460 3461/* Look up an entry in an the header file hash table. */ 3462 3463#define aout_link_includes_lookup(table, string, create, copy) \ 3464 ((struct aout_link_includes_entry *) \ 3465 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3466 3467/* During the final link step we need to pass around a bunch of 3468 information, so we do it in an instance of this structure. */ 3469 3470struct aout_final_link_info 3471{ 3472 /* General link information. */ 3473 struct bfd_link_info *info; 3474 /* Output bfd. */ 3475 bfd *output_bfd; 3476 /* Reloc file positions. */ 3477 file_ptr treloff, dreloff; 3478 /* File position of symbols. */ 3479 file_ptr symoff; 3480 /* String table. */ 3481 struct bfd_strtab_hash *strtab; 3482 /* Header file hash table. */ 3483 struct aout_link_includes_table includes; 3484 /* A buffer large enough to hold the contents of any section. */ 3485 bfd_byte *contents; 3486 /* A buffer large enough to hold the relocs of any section. */ 3487 void * relocs; 3488 /* A buffer large enough to hold the symbol map of any input BFD. */ 3489 int *symbol_map; 3490 /* A buffer large enough to hold output symbols of any input BFD. */ 3491 struct external_nlist *output_syms; 3492}; 3493 3494/* The function to create a new entry in the header file hash table. */ 3495 3496static struct bfd_hash_entry * 3497aout_link_includes_newfunc (struct bfd_hash_entry *entry, 3498 struct bfd_hash_table *table, 3499 const char *string) 3500{ 3501 struct aout_link_includes_entry *ret = 3502 (struct aout_link_includes_entry *) entry; 3503 3504 /* Allocate the structure if it has not already been allocated by a 3505 subclass. */ 3506 if (ret == NULL) 3507 ret = bfd_hash_allocate (table, sizeof (* ret)); 3508 if (ret == NULL) 3509 return NULL; 3510 3511 /* Call the allocation method of the superclass. */ 3512 ret = ((struct aout_link_includes_entry *) 3513 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3514 if (ret) 3515 { 3516 /* Set local fields. */ 3517 ret->totals = NULL; 3518 } 3519 3520 return (struct bfd_hash_entry *) ret; 3521} 3522 3523/* Write out a symbol that was not associated with an a.out input 3524 object. */ 3525 3526static bfd_boolean 3527aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data) 3528{ 3529 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; 3530 bfd *output_bfd; 3531 int type; 3532 bfd_vma val; 3533 struct external_nlist outsym; 3534 bfd_size_type indx; 3535 bfd_size_type amt; 3536 3537 if (h->root.type == bfd_link_hash_warning) 3538 { 3539 h = (struct aout_link_hash_entry *) h->root.u.i.link; 3540 if (h->root.type == bfd_link_hash_new) 3541 return TRUE; 3542 } 3543 3544 output_bfd = finfo->output_bfd; 3545 3546 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 3547 { 3548 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 3549 (output_bfd, finfo->info, h))) 3550 { 3551 /* FIXME: No way to handle errors. */ 3552 abort (); 3553 } 3554 } 3555 3556 if (h->written) 3557 return TRUE; 3558 3559 h->written = TRUE; 3560 3561 /* An indx of -2 means the symbol must be written. */ 3562 if (h->indx != -2 3563 && (finfo->info->strip == strip_all 3564 || (finfo->info->strip == strip_some 3565 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, 3566 FALSE, FALSE) == NULL))) 3567 return TRUE; 3568 3569 switch (h->root.type) 3570 { 3571 default: 3572 case bfd_link_hash_warning: 3573 abort (); 3574 /* Avoid variable not initialized warnings. */ 3575 return TRUE; 3576 case bfd_link_hash_new: 3577 /* This can happen for set symbols when sets are not being 3578 built. */ 3579 return TRUE; 3580 case bfd_link_hash_undefined: 3581 type = N_UNDF | N_EXT; 3582 val = 0; 3583 break; 3584 case bfd_link_hash_defined: 3585 case bfd_link_hash_defweak: 3586 { 3587 asection *sec; 3588 3589 sec = h->root.u.def.section->output_section; 3590 BFD_ASSERT (bfd_is_abs_section (sec) 3591 || sec->owner == output_bfd); 3592 if (sec == obj_textsec (output_bfd)) 3593 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 3594 else if (sec == obj_datasec (output_bfd)) 3595 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 3596 else if (sec == obj_bsssec (output_bfd)) 3597 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 3598 else 3599 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 3600 type |= N_EXT; 3601 val = (h->root.u.def.value 3602 + sec->vma 3603 + h->root.u.def.section->output_offset); 3604 } 3605 break; 3606 case bfd_link_hash_common: 3607 type = N_UNDF | N_EXT; 3608 val = h->root.u.c.size; 3609 break; 3610 case bfd_link_hash_undefweak: 3611 type = N_WEAKU; 3612 val = 0; 3613 case bfd_link_hash_indirect: 3614 /* We ignore these symbols, since the indirected symbol is 3615 already in the hash table. */ 3616 return TRUE; 3617 } 3618 3619 H_PUT_8 (output_bfd, type, outsym.e_type); 3620 H_PUT_8 (output_bfd, 0, outsym.e_other); 3621 H_PUT_16 (output_bfd, 0, outsym.e_desc); 3622 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, 3623 FALSE); 3624 if (indx == - (bfd_size_type) 1) 3625 /* FIXME: No way to handle errors. */ 3626 abort (); 3627 3628 PUT_WORD (output_bfd, indx, outsym.e_strx); 3629 PUT_WORD (output_bfd, val, outsym.e_value); 3630 3631 amt = EXTERNAL_NLIST_SIZE; 3632 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 3633 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) 3634 /* FIXME: No way to handle errors. */ 3635 abort (); 3636 3637 finfo->symoff += EXTERNAL_NLIST_SIZE; 3638 h->indx = obj_aout_external_sym_count (output_bfd); 3639 ++obj_aout_external_sym_count (output_bfd); 3640 3641 return TRUE; 3642} 3643 3644/* Handle a link order which is supposed to generate a reloc. */ 3645 3646static bfd_boolean 3647aout_link_reloc_link_order (struct aout_final_link_info *finfo, 3648 asection *o, 3649 struct bfd_link_order *p) 3650{ 3651 struct bfd_link_order_reloc *pr; 3652 int r_index; 3653 int r_extern; 3654 reloc_howto_type *howto; 3655 file_ptr *reloff_ptr = NULL; 3656 struct reloc_std_external srel; 3657 struct reloc_ext_external erel; 3658 void * rel_ptr; 3659 bfd_size_type amt; 3660 3661 pr = p->u.reloc.p; 3662 3663 if (p->type == bfd_section_reloc_link_order) 3664 { 3665 r_extern = 0; 3666 if (bfd_is_abs_section (pr->u.section)) 3667 r_index = N_ABS | N_EXT; 3668 else 3669 { 3670 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); 3671 r_index = pr->u.section->target_index; 3672 } 3673 } 3674 else 3675 { 3676 struct aout_link_hash_entry *h; 3677 3678 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 3679 r_extern = 1; 3680 h = ((struct aout_link_hash_entry *) 3681 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, 3682 pr->u.name, FALSE, FALSE, TRUE)); 3683 if (h != NULL 3684 && h->indx >= 0) 3685 r_index = h->indx; 3686 else if (h != NULL) 3687 { 3688 /* We decided to strip this symbol, but it turns out that we 3689 can't. Note that we lose the other and desc information 3690 here. I don't think that will ever matter for a global 3691 symbol. */ 3692 h->indx = -2; 3693 h->written = FALSE; 3694 if (! aout_link_write_other_symbol (h, (void *) finfo)) 3695 return FALSE; 3696 r_index = h->indx; 3697 } 3698 else 3699 { 3700 if (! ((*finfo->info->callbacks->unattached_reloc) 3701 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0))) 3702 return FALSE; 3703 r_index = 0; 3704 } 3705 } 3706 3707 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); 3708 if (howto == 0) 3709 { 3710 bfd_set_error (bfd_error_bad_value); 3711 return FALSE; 3712 } 3713 3714 if (o == obj_textsec (finfo->output_bfd)) 3715 reloff_ptr = &finfo->treloff; 3716 else if (o == obj_datasec (finfo->output_bfd)) 3717 reloff_ptr = &finfo->dreloff; 3718 else 3719 abort (); 3720 3721 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) 3722 { 3723#ifdef MY_put_reloc 3724 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto, 3725 &srel); 3726#else 3727 { 3728 int r_pcrel; 3729 int r_baserel; 3730 int r_jmptable; 3731 int r_relative; 3732 int r_length; 3733 3734 r_pcrel = (int) howto->pc_relative; 3735 r_baserel = (howto->type & 8) != 0; 3736 r_jmptable = (howto->type & 16) != 0; 3737 r_relative = (howto->type & 32) != 0; 3738 r_length = howto->size; 3739 3740 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); 3741 if (bfd_header_big_endian (finfo->output_bfd)) 3742 { 3743 srel.r_index[0] = r_index >> 16; 3744 srel.r_index[1] = r_index >> 8; 3745 srel.r_index[2] = r_index; 3746 srel.r_type[0] = 3747 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 3748 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 3749 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 3750 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 3751 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 3752 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 3753 } 3754 else 3755 { 3756 srel.r_index[2] = r_index >> 16; 3757 srel.r_index[1] = r_index >> 8; 3758 srel.r_index[0] = r_index; 3759 srel.r_type[0] = 3760 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 3761 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 3762 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 3763 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 3764 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 3765 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 3766 } 3767 } 3768#endif 3769 rel_ptr = (void *) &srel; 3770 3771 /* We have to write the addend into the object file, since 3772 standard a.out relocs are in place. It would be more 3773 reliable if we had the current contents of the file here, 3774 rather than assuming zeroes, but we can't read the file since 3775 it was opened using bfd_openw. */ 3776 if (pr->addend != 0) 3777 { 3778 bfd_size_type size; 3779 bfd_reloc_status_type r; 3780 bfd_byte *buf; 3781 bfd_boolean ok; 3782 3783 size = bfd_get_reloc_size (howto); 3784 buf = bfd_zmalloc (size); 3785 if (buf == NULL) 3786 return FALSE; 3787 r = MY_relocate_contents (howto, finfo->output_bfd, 3788 (bfd_vma) pr->addend, buf); 3789 switch (r) 3790 { 3791 case bfd_reloc_ok: 3792 break; 3793 default: 3794 case bfd_reloc_outofrange: 3795 abort (); 3796 case bfd_reloc_overflow: 3797 if (! ((*finfo->info->callbacks->reloc_overflow) 3798 (finfo->info, NULL, 3799 (p->type == bfd_section_reloc_link_order 3800 ? bfd_section_name (finfo->output_bfd, 3801 pr->u.section) 3802 : pr->u.name), 3803 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0))) 3804 { 3805 free (buf); 3806 return FALSE; 3807 } 3808 break; 3809 } 3810 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf, 3811 (file_ptr) p->offset, size); 3812 free (buf); 3813 if (! ok) 3814 return FALSE; 3815 } 3816 } 3817 else 3818 { 3819#ifdef MY_put_ext_reloc 3820 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset, 3821 howto, &erel, pr->addend); 3822#else 3823 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); 3824 3825 if (bfd_header_big_endian (finfo->output_bfd)) 3826 { 3827 erel.r_index[0] = r_index >> 16; 3828 erel.r_index[1] = r_index >> 8; 3829 erel.r_index[2] = r_index; 3830 erel.r_type[0] = 3831 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 3832 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 3833 } 3834 else 3835 { 3836 erel.r_index[2] = r_index >> 16; 3837 erel.r_index[1] = r_index >> 8; 3838 erel.r_index[0] = r_index; 3839 erel.r_type[0] = 3840 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 3841 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 3842 } 3843 3844 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 3845#endif /* MY_put_ext_reloc */ 3846 3847 rel_ptr = (void *) &erel; 3848 } 3849 3850 amt = obj_reloc_entry_size (finfo->output_bfd); 3851 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 3852 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt) 3853 return FALSE; 3854 3855 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); 3856 3857 /* Assert that the relocs have not run into the symbols, and that n 3858 the text relocs have not run into the data relocs. */ 3859 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 3860 && (reloff_ptr != &finfo->treloff 3861 || (*reloff_ptr 3862 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 3863 3864 return TRUE; 3865} 3866 3867/* Get the section corresponding to a reloc index. */ 3868 3869static INLINE asection * 3870aout_reloc_index_to_section (bfd *abfd, int indx) 3871{ 3872 switch (indx & N_TYPE) 3873 { 3874 case N_TEXT: return obj_textsec (abfd); 3875 case N_DATA: return obj_datasec (abfd); 3876 case N_BSS: return obj_bsssec (abfd); 3877 case N_ABS: 3878 case N_UNDF: return bfd_abs_section_ptr; 3879 default: abort (); 3880 } 3881 return NULL; 3882} 3883 3884/* Relocate an a.out section using standard a.out relocs. */ 3885 3886static bfd_boolean 3887aout_link_input_section_std (struct aout_final_link_info *finfo, 3888 bfd *input_bfd, 3889 asection *input_section, 3890 struct reloc_std_external *relocs, 3891 bfd_size_type rel_size, 3892 bfd_byte *contents) 3893{ 3894 bfd_boolean (*check_dynamic_reloc) 3895 (struct bfd_link_info *, bfd *, asection *, 3896 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 3897 bfd_vma *); 3898 bfd *output_bfd; 3899 bfd_boolean relocatable; 3900 struct external_nlist *syms; 3901 char *strings; 3902 struct aout_link_hash_entry **sym_hashes; 3903 int *symbol_map; 3904 bfd_size_type reloc_count; 3905 struct reloc_std_external *rel; 3906 struct reloc_std_external *rel_end; 3907 3908 output_bfd = finfo->output_bfd; 3909 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 3910 3911 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 3912 BFD_ASSERT (input_bfd->xvec->header_byteorder 3913 == output_bfd->xvec->header_byteorder); 3914 3915 relocatable = finfo->info->relocatable; 3916 syms = obj_aout_external_syms (input_bfd); 3917 strings = obj_aout_external_strings (input_bfd); 3918 sym_hashes = obj_aout_sym_hashes (input_bfd); 3919 symbol_map = finfo->symbol_map; 3920 3921 reloc_count = rel_size / RELOC_STD_SIZE; 3922 rel = relocs; 3923 rel_end = rel + reloc_count; 3924 for (; rel < rel_end; rel++) 3925 { 3926 bfd_vma r_addr; 3927 int r_index; 3928 int r_extern; 3929 int r_pcrel; 3930 int r_baserel = 0; 3931 reloc_howto_type *howto; 3932 struct aout_link_hash_entry *h = NULL; 3933 bfd_vma relocation; 3934 bfd_reloc_status_type r; 3935 3936 r_addr = GET_SWORD (input_bfd, rel->r_address); 3937 3938#ifdef MY_reloc_howto 3939 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 3940#else 3941 { 3942 int r_jmptable; 3943 int r_relative; 3944 int r_length; 3945 unsigned int howto_idx; 3946 3947 if (bfd_header_big_endian (input_bfd)) 3948 { 3949 r_index = (((unsigned int) rel->r_index[0] << 16) 3950 | ((unsigned int) rel->r_index[1] << 8) 3951 | rel->r_index[2]); 3952 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 3953 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 3954 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 3955 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 3956 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 3957 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 3958 >> RELOC_STD_BITS_LENGTH_SH_BIG); 3959 } 3960 else 3961 { 3962 r_index = (((unsigned int) rel->r_index[2] << 16) 3963 | ((unsigned int) rel->r_index[1] << 8) 3964 | rel->r_index[0]); 3965 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 3966 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 3967 r_baserel = (0 != (rel->r_type[0] 3968 & RELOC_STD_BITS_BASEREL_LITTLE)); 3969 r_jmptable= (0 != (rel->r_type[0] 3970 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 3971 r_relative= (0 != (rel->r_type[0] 3972 & RELOC_STD_BITS_RELATIVE_LITTLE)); 3973 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 3974 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 3975 } 3976 3977 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 3978 + 16 * r_jmptable + 32 * r_relative); 3979 if (howto_idx < TABLE_SIZE (howto_table_std)) 3980 howto = howto_table_std + howto_idx; 3981 else 3982 howto = NULL; 3983 } 3984#endif 3985 3986 if (howto == NULL) 3987 { 3988 (*finfo->info->callbacks->einfo) 3989 (_("%P: %B: unexpected relocation type\n"), input_bfd); 3990 bfd_set_error (bfd_error_bad_value); 3991 return FALSE; 3992 } 3993 3994 if (relocatable) 3995 { 3996 /* We are generating a relocatable output file, and must 3997 modify the reloc accordingly. */ 3998 if (r_extern) 3999 { 4000 /* If we know the symbol this relocation is against, 4001 convert it into a relocation against a section. This 4002 is what the native linker does. */ 4003 h = sym_hashes[r_index]; 4004 if (h != NULL 4005 && (h->root.type == bfd_link_hash_defined 4006 || h->root.type == bfd_link_hash_defweak)) 4007 { 4008 asection *output_section; 4009 4010 /* Change the r_extern value. */ 4011 if (bfd_header_big_endian (output_bfd)) 4012 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4013 else 4014 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4015 4016 /* Compute a new r_index. */ 4017 output_section = h->root.u.def.section->output_section; 4018 if (output_section == obj_textsec (output_bfd)) 4019 r_index = N_TEXT; 4020 else if (output_section == obj_datasec (output_bfd)) 4021 r_index = N_DATA; 4022 else if (output_section == obj_bsssec (output_bfd)) 4023 r_index = N_BSS; 4024 else 4025 r_index = N_ABS; 4026 4027 /* Add the symbol value and the section VMA to the 4028 addend stored in the contents. */ 4029 relocation = (h->root.u.def.value 4030 + output_section->vma 4031 + h->root.u.def.section->output_offset); 4032 } 4033 else 4034 { 4035 /* We must change r_index according to the symbol 4036 map. */ 4037 r_index = symbol_map[r_index]; 4038 4039 if (r_index == -1) 4040 { 4041 if (h != NULL) 4042 { 4043 /* We decided to strip this symbol, but it 4044 turns out that we can't. Note that we 4045 lose the other and desc information here. 4046 I don't think that will ever matter for a 4047 global symbol. */ 4048 if (h->indx < 0) 4049 { 4050 h->indx = -2; 4051 h->written = FALSE; 4052 if (! aout_link_write_other_symbol (h, 4053 (void *) finfo)) 4054 return FALSE; 4055 } 4056 r_index = h->indx; 4057 } 4058 else 4059 { 4060 const char *name; 4061 4062 name = strings + GET_WORD (input_bfd, 4063 syms[r_index].e_strx); 4064 if (! ((*finfo->info->callbacks->unattached_reloc) 4065 (finfo->info, name, input_bfd, input_section, 4066 r_addr))) 4067 return FALSE; 4068 r_index = 0; 4069 } 4070 } 4071 4072 relocation = 0; 4073 } 4074 4075 /* Write out the new r_index value. */ 4076 if (bfd_header_big_endian (output_bfd)) 4077 { 4078 rel->r_index[0] = r_index >> 16; 4079 rel->r_index[1] = r_index >> 8; 4080 rel->r_index[2] = r_index; 4081 } 4082 else 4083 { 4084 rel->r_index[2] = r_index >> 16; 4085 rel->r_index[1] = r_index >> 8; 4086 rel->r_index[0] = r_index; 4087 } 4088 } 4089 else 4090 { 4091 asection *section; 4092 4093 /* This is a relocation against a section. We must 4094 adjust by the amount that the section moved. */ 4095 section = aout_reloc_index_to_section (input_bfd, r_index); 4096 relocation = (section->output_section->vma 4097 + section->output_offset 4098 - section->vma); 4099 } 4100 4101 /* Change the address of the relocation. */ 4102 PUT_WORD (output_bfd, 4103 r_addr + input_section->output_offset, 4104 rel->r_address); 4105 4106 /* Adjust a PC relative relocation by removing the reference 4107 to the original address in the section and including the 4108 reference to the new address. */ 4109 if (r_pcrel) 4110 relocation -= (input_section->output_section->vma 4111 + input_section->output_offset 4112 - input_section->vma); 4113 4114#ifdef MY_relocatable_reloc 4115 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4116#endif 4117 4118 if (relocation == 0) 4119 r = bfd_reloc_ok; 4120 else 4121 r = MY_relocate_contents (howto, 4122 input_bfd, relocation, 4123 contents + r_addr); 4124 } 4125 else 4126 { 4127 bfd_boolean hundef; 4128 4129 /* We are generating an executable, and must do a full 4130 relocation. */ 4131 hundef = FALSE; 4132 4133 if (r_extern) 4134 { 4135 h = sym_hashes[r_index]; 4136 4137 if (h != NULL 4138 && (h->root.type == bfd_link_hash_defined 4139 || h->root.type == bfd_link_hash_defweak)) 4140 { 4141 relocation = (h->root.u.def.value 4142 + h->root.u.def.section->output_section->vma 4143 + h->root.u.def.section->output_offset); 4144 } 4145 else if (h != NULL 4146 && h->root.type == bfd_link_hash_undefweak) 4147 relocation = 0; 4148 else 4149 { 4150 hundef = TRUE; 4151 relocation = 0; 4152 } 4153 } 4154 else 4155 { 4156 asection *section; 4157 4158 section = aout_reloc_index_to_section (input_bfd, r_index); 4159 relocation = (section->output_section->vma 4160 + section->output_offset 4161 - section->vma); 4162 if (r_pcrel) 4163 relocation += input_section->vma; 4164 } 4165 4166 if (check_dynamic_reloc != NULL) 4167 { 4168 bfd_boolean skip; 4169 4170 if (! ((*check_dynamic_reloc) 4171 (finfo->info, input_bfd, input_section, h, 4172 (void *) rel, contents, &skip, &relocation))) 4173 return FALSE; 4174 if (skip) 4175 continue; 4176 } 4177 4178 /* Now warn if a global symbol is undefined. We could not 4179 do this earlier, because check_dynamic_reloc might want 4180 to skip this reloc. */ 4181 if (hundef && ! finfo->info->shared && ! r_baserel) 4182 { 4183 const char *name; 4184 4185 if (h != NULL) 4186 name = h->root.root.string; 4187 else 4188 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4189 if (! ((*finfo->info->callbacks->undefined_symbol) 4190 (finfo->info, name, input_bfd, input_section, 4191 r_addr, TRUE))) 4192 return FALSE; 4193 } 4194 4195 r = MY_final_link_relocate (howto, 4196 input_bfd, input_section, 4197 contents, r_addr, relocation, 4198 (bfd_vma) 0); 4199 } 4200 4201 if (r != bfd_reloc_ok) 4202 { 4203 switch (r) 4204 { 4205 default: 4206 case bfd_reloc_outofrange: 4207 abort (); 4208 case bfd_reloc_overflow: 4209 { 4210 const char *name; 4211 4212 if (h != NULL) 4213 name = NULL; 4214 else if (r_extern) 4215 name = strings + GET_WORD (input_bfd, 4216 syms[r_index].e_strx); 4217 else 4218 { 4219 asection *s; 4220 4221 s = aout_reloc_index_to_section (input_bfd, r_index); 4222 name = bfd_section_name (input_bfd, s); 4223 } 4224 if (! ((*finfo->info->callbacks->reloc_overflow) 4225 (finfo->info, (h ? &h->root : NULL), name, 4226 howto->name, (bfd_vma) 0, input_bfd, 4227 input_section, r_addr))) 4228 return FALSE; 4229 } 4230 break; 4231 } 4232 } 4233 } 4234 4235 return TRUE; 4236} 4237 4238/* Relocate an a.out section using extended a.out relocs. */ 4239 4240static bfd_boolean 4241aout_link_input_section_ext (struct aout_final_link_info *finfo, 4242 bfd *input_bfd, 4243 asection *input_section, 4244 struct reloc_ext_external *relocs, 4245 bfd_size_type rel_size, 4246 bfd_byte *contents) 4247{ 4248 bfd_boolean (*check_dynamic_reloc) 4249 (struct bfd_link_info *, bfd *, asection *, 4250 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, 4251 bfd_vma *); 4252 bfd *output_bfd; 4253 bfd_boolean relocatable; 4254 struct external_nlist *syms; 4255 char *strings; 4256 struct aout_link_hash_entry **sym_hashes; 4257 int *symbol_map; 4258 bfd_size_type reloc_count; 4259 struct reloc_ext_external *rel; 4260 struct reloc_ext_external *rel_end; 4261 4262 output_bfd = finfo->output_bfd; 4263 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4264 4265 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 4266 BFD_ASSERT (input_bfd->xvec->header_byteorder 4267 == output_bfd->xvec->header_byteorder); 4268 4269 relocatable = finfo->info->relocatable; 4270 syms = obj_aout_external_syms (input_bfd); 4271 strings = obj_aout_external_strings (input_bfd); 4272 sym_hashes = obj_aout_sym_hashes (input_bfd); 4273 symbol_map = finfo->symbol_map; 4274 4275 reloc_count = rel_size / RELOC_EXT_SIZE; 4276 rel = relocs; 4277 rel_end = rel + reloc_count; 4278 for (; rel < rel_end; rel++) 4279 { 4280 bfd_vma r_addr; 4281 int r_index; 4282 int r_extern; 4283 unsigned int r_type; 4284 bfd_vma r_addend; 4285 struct aout_link_hash_entry *h = NULL; 4286 asection *r_section = NULL; 4287 bfd_vma relocation; 4288 4289 r_addr = GET_SWORD (input_bfd, rel->r_address); 4290 4291 if (bfd_header_big_endian (input_bfd)) 4292 { 4293 r_index = (((unsigned int) rel->r_index[0] << 16) 4294 | ((unsigned int) rel->r_index[1] << 8) 4295 | rel->r_index[2]); 4296 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 4297 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 4298 >> RELOC_EXT_BITS_TYPE_SH_BIG); 4299 } 4300 else 4301 { 4302 r_index = (((unsigned int) rel->r_index[2] << 16) 4303 | ((unsigned int) rel->r_index[1] << 8) 4304 | rel->r_index[0]); 4305 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 4306 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 4307 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 4308 } 4309 4310 r_addend = GET_SWORD (input_bfd, rel->r_addend); 4311 4312 if (r_type >= TABLE_SIZE (howto_table_ext)) 4313 { 4314 (*finfo->info->callbacks->einfo) 4315 (_("%P: %B: unexpected relocation type\n"), input_bfd); 4316 bfd_set_error (bfd_error_bad_value); 4317 return FALSE; 4318 } 4319 4320 if (relocatable) 4321 { 4322 /* We are generating a relocatable output file, and must 4323 modify the reloc accordingly. */ 4324 if (r_extern 4325 || r_type == (unsigned int) RELOC_BASE10 4326 || r_type == (unsigned int) RELOC_BASE13 4327 || r_type == (unsigned int) RELOC_BASE22) 4328 { 4329 /* If we know the symbol this relocation is against, 4330 convert it into a relocation against a section. This 4331 is what the native linker does. */ 4332 if (r_type == (unsigned int) RELOC_BASE10 4333 || r_type == (unsigned int) RELOC_BASE13 4334 || r_type == (unsigned int) RELOC_BASE22) 4335 h = NULL; 4336 else 4337 h = sym_hashes[r_index]; 4338 if (h != NULL 4339 && (h->root.type == bfd_link_hash_defined 4340 || h->root.type == bfd_link_hash_defweak)) 4341 { 4342 asection *output_section; 4343 4344 /* Change the r_extern value. */ 4345 if (bfd_header_big_endian (output_bfd)) 4346 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 4347 else 4348 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 4349 4350 /* Compute a new r_index. */ 4351 output_section = h->root.u.def.section->output_section; 4352 if (output_section == obj_textsec (output_bfd)) 4353 r_index = N_TEXT; 4354 else if (output_section == obj_datasec (output_bfd)) 4355 r_index = N_DATA; 4356 else if (output_section == obj_bsssec (output_bfd)) 4357 r_index = N_BSS; 4358 else 4359 r_index = N_ABS; 4360 4361 /* Add the symbol value and the section VMA to the 4362 addend. */ 4363 relocation = (h->root.u.def.value 4364 + output_section->vma 4365 + h->root.u.def.section->output_offset); 4366 4367 /* Now RELOCATION is the VMA of the final 4368 destination. If this is a PC relative reloc, 4369 then ADDEND is the negative of the source VMA. 4370 We want to set ADDEND to the difference between 4371 the destination VMA and the source VMA, which 4372 means we must adjust RELOCATION by the change in 4373 the source VMA. This is done below. */ 4374 } 4375 else 4376 { 4377 /* We must change r_index according to the symbol 4378 map. */ 4379 r_index = symbol_map[r_index]; 4380 4381 if (r_index == -1) 4382 { 4383 if (h != NULL) 4384 { 4385 /* We decided to strip this symbol, but it 4386 turns out that we can't. Note that we 4387 lose the other and desc information here. 4388 I don't think that will ever matter for a 4389 global symbol. */ 4390 if (h->indx < 0) 4391 { 4392 h->indx = -2; 4393 h->written = FALSE; 4394 if (! aout_link_write_other_symbol (h, 4395 (void *) finfo)) 4396 return FALSE; 4397 } 4398 r_index = h->indx; 4399 } 4400 else 4401 { 4402 const char *name; 4403 4404 name = strings + GET_WORD (input_bfd, 4405 syms[r_index].e_strx); 4406 if (! ((*finfo->info->callbacks->unattached_reloc) 4407 (finfo->info, name, input_bfd, input_section, 4408 r_addr))) 4409 return FALSE; 4410 r_index = 0; 4411 } 4412 } 4413 4414 relocation = 0; 4415 4416 /* If this is a PC relative reloc, then the addend 4417 is the negative of the source VMA. We must 4418 adjust it by the change in the source VMA. This 4419 is done below. */ 4420 } 4421 4422 /* Write out the new r_index value. */ 4423 if (bfd_header_big_endian (output_bfd)) 4424 { 4425 rel->r_index[0] = r_index >> 16; 4426 rel->r_index[1] = r_index >> 8; 4427 rel->r_index[2] = r_index; 4428 } 4429 else 4430 { 4431 rel->r_index[2] = r_index >> 16; 4432 rel->r_index[1] = r_index >> 8; 4433 rel->r_index[0] = r_index; 4434 } 4435 } 4436 else 4437 { 4438 /* This is a relocation against a section. We must 4439 adjust by the amount that the section moved. */ 4440 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4441 relocation = (r_section->output_section->vma 4442 + r_section->output_offset 4443 - r_section->vma); 4444 4445 /* If this is a PC relative reloc, then the addend is 4446 the difference in VMA between the destination and the 4447 source. We have just adjusted for the change in VMA 4448 of the destination, so we must also adjust by the 4449 change in VMA of the source. This is done below. */ 4450 } 4451 4452 /* As described above, we must always adjust a PC relative 4453 reloc by the change in VMA of the source. However, if 4454 pcrel_offset is set, then the addend does not include the 4455 location within the section, in which case we don't need 4456 to adjust anything. */ 4457 if (howto_table_ext[r_type].pc_relative 4458 && ! howto_table_ext[r_type].pcrel_offset) 4459 relocation -= (input_section->output_section->vma 4460 + input_section->output_offset 4461 - input_section->vma); 4462 4463 /* Change the addend if necessary. */ 4464 if (relocation != 0) 4465 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 4466 4467 /* Change the address of the relocation. */ 4468 PUT_WORD (output_bfd, 4469 r_addr + input_section->output_offset, 4470 rel->r_address); 4471 } 4472 else 4473 { 4474 bfd_boolean hundef; 4475 bfd_reloc_status_type r; 4476 4477 /* We are generating an executable, and must do a full 4478 relocation. */ 4479 hundef = FALSE; 4480 4481 if (r_extern) 4482 { 4483 h = sym_hashes[r_index]; 4484 4485 if (h != NULL 4486 && (h->root.type == bfd_link_hash_defined 4487 || h->root.type == bfd_link_hash_defweak)) 4488 { 4489 relocation = (h->root.u.def.value 4490 + h->root.u.def.section->output_section->vma 4491 + h->root.u.def.section->output_offset); 4492 } 4493 else if (h != NULL 4494 && h->root.type == bfd_link_hash_undefweak) 4495 relocation = 0; 4496 else 4497 { 4498 hundef = TRUE; 4499 relocation = 0; 4500 } 4501 } 4502 else if (r_type == (unsigned int) RELOC_BASE10 4503 || r_type == (unsigned int) RELOC_BASE13 4504 || r_type == (unsigned int) RELOC_BASE22) 4505 { 4506 struct external_nlist *sym; 4507 int type; 4508 4509 /* For base relative relocs, r_index is always an index 4510 into the symbol table, even if r_extern is 0. */ 4511 sym = syms + r_index; 4512 type = H_GET_8 (input_bfd, sym->e_type); 4513 if ((type & N_TYPE) == N_TEXT 4514 || type == N_WEAKT) 4515 r_section = obj_textsec (input_bfd); 4516 else if ((type & N_TYPE) == N_DATA 4517 || type == N_WEAKD) 4518 r_section = obj_datasec (input_bfd); 4519 else if ((type & N_TYPE) == N_BSS 4520 || type == N_WEAKB) 4521 r_section = obj_bsssec (input_bfd); 4522 else if ((type & N_TYPE) == N_ABS 4523 || type == N_WEAKA) 4524 r_section = bfd_abs_section_ptr; 4525 else 4526 abort (); 4527 relocation = (r_section->output_section->vma 4528 + r_section->output_offset 4529 + (GET_WORD (input_bfd, sym->e_value) 4530 - r_section->vma)); 4531 } 4532 else 4533 { 4534 r_section = aout_reloc_index_to_section (input_bfd, r_index); 4535 4536 /* If this is a PC relative reloc, then R_ADDEND is the 4537 difference between the two vmas, or 4538 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 4539 where 4540 old_dest_sec == section->vma 4541 and 4542 old_src_sec == input_section->vma 4543 and 4544 old_src_off == r_addr 4545 4546 _bfd_final_link_relocate expects RELOCATION + 4547 R_ADDEND to be the VMA of the destination minus 4548 r_addr (the minus r_addr is because this relocation 4549 is not pcrel_offset, which is a bit confusing and 4550 should, perhaps, be changed), or 4551 new_dest_sec 4552 where 4553 new_dest_sec == output_section->vma + output_offset 4554 We arrange for this to happen by setting RELOCATION to 4555 new_dest_sec + old_src_sec - old_dest_sec 4556 4557 If this is not a PC relative reloc, then R_ADDEND is 4558 simply the VMA of the destination, so we set 4559 RELOCATION to the change in the destination VMA, or 4560 new_dest_sec - old_dest_sec 4561 */ 4562 relocation = (r_section->output_section->vma 4563 + r_section->output_offset 4564 - r_section->vma); 4565 if (howto_table_ext[r_type].pc_relative) 4566 relocation += input_section->vma; 4567 } 4568 4569 if (check_dynamic_reloc != NULL) 4570 { 4571 bfd_boolean skip; 4572 4573 if (! ((*check_dynamic_reloc) 4574 (finfo->info, input_bfd, input_section, h, 4575 (void *) rel, contents, &skip, &relocation))) 4576 return FALSE; 4577 if (skip) 4578 continue; 4579 } 4580 4581 /* Now warn if a global symbol is undefined. We could not 4582 do this earlier, because check_dynamic_reloc might want 4583 to skip this reloc. */ 4584 if (hundef 4585 && ! finfo->info->shared 4586 && r_type != (unsigned int) RELOC_BASE10 4587 && r_type != (unsigned int) RELOC_BASE13 4588 && r_type != (unsigned int) RELOC_BASE22) 4589 { 4590 const char *name; 4591 4592 if (h != NULL) 4593 name = h->root.root.string; 4594 else 4595 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 4596 if (! ((*finfo->info->callbacks->undefined_symbol) 4597 (finfo->info, name, input_bfd, input_section, 4598 r_addr, TRUE))) 4599 return FALSE; 4600 } 4601 4602 if (r_type != (unsigned int) RELOC_SPARC_REV32) 4603 r = MY_final_link_relocate (howto_table_ext + r_type, 4604 input_bfd, input_section, 4605 contents, r_addr, relocation, 4606 r_addend); 4607 else 4608 { 4609 bfd_vma x; 4610 4611 x = bfd_get_32 (input_bfd, contents + r_addr); 4612 x = x + relocation + r_addend; 4613 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 4614 r = bfd_reloc_ok; 4615 } 4616 4617 if (r != bfd_reloc_ok) 4618 { 4619 switch (r) 4620 { 4621 default: 4622 case bfd_reloc_outofrange: 4623 abort (); 4624 case bfd_reloc_overflow: 4625 { 4626 const char *name; 4627 4628 if (h != NULL) 4629 name = NULL; 4630 else if (r_extern 4631 || r_type == (unsigned int) RELOC_BASE10 4632 || r_type == (unsigned int) RELOC_BASE13 4633 || r_type == (unsigned int) RELOC_BASE22) 4634 name = strings + GET_WORD (input_bfd, 4635 syms[r_index].e_strx); 4636 else 4637 { 4638 asection *s; 4639 4640 s = aout_reloc_index_to_section (input_bfd, r_index); 4641 name = bfd_section_name (input_bfd, s); 4642 } 4643 if (! ((*finfo->info->callbacks->reloc_overflow) 4644 (finfo->info, (h ? &h->root : NULL), name, 4645 howto_table_ext[r_type].name, 4646 r_addend, input_bfd, input_section, r_addr))) 4647 return FALSE; 4648 } 4649 break; 4650 } 4651 } 4652 } 4653 } 4654 4655 return TRUE; 4656} 4657 4658/* Link an a.out section into the output file. */ 4659 4660static bfd_boolean 4661aout_link_input_section (struct aout_final_link_info *finfo, 4662 bfd *input_bfd, 4663 asection *input_section, 4664 file_ptr *reloff_ptr, 4665 bfd_size_type rel_size) 4666{ 4667 bfd_size_type input_size; 4668 void * relocs; 4669 4670 /* Get the section contents. */ 4671 input_size = input_section->size; 4672 if (! bfd_get_section_contents (input_bfd, input_section, 4673 (void *) finfo->contents, 4674 (file_ptr) 0, input_size)) 4675 return FALSE; 4676 4677 /* Read in the relocs if we haven't already done it. */ 4678 if (aout_section_data (input_section) != NULL 4679 && aout_section_data (input_section)->relocs != NULL) 4680 relocs = aout_section_data (input_section)->relocs; 4681 else 4682 { 4683 relocs = finfo->relocs; 4684 if (rel_size > 0) 4685 { 4686 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4687 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4688 return FALSE; 4689 } 4690 } 4691 4692 /* Relocate the section contents. */ 4693 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4694 { 4695 if (! aout_link_input_section_std (finfo, input_bfd, input_section, 4696 (struct reloc_std_external *) relocs, 4697 rel_size, finfo->contents)) 4698 return FALSE; 4699 } 4700 else 4701 { 4702 if (! aout_link_input_section_ext (finfo, input_bfd, input_section, 4703 (struct reloc_ext_external *) relocs, 4704 rel_size, finfo->contents)) 4705 return FALSE; 4706 } 4707 4708 /* Write out the section contents. */ 4709 if (! bfd_set_section_contents (finfo->output_bfd, 4710 input_section->output_section, 4711 (void *) finfo->contents, 4712 (file_ptr) input_section->output_offset, 4713 input_size)) 4714 return FALSE; 4715 4716 /* If we are producing relocatable output, the relocs were 4717 modified, and we now write them out. */ 4718 if (finfo->info->relocatable && rel_size > 0) 4719 { 4720 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4721 return FALSE; 4722 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size) 4723 return FALSE; 4724 *reloff_ptr += rel_size; 4725 4726 /* Assert that the relocs have not run into the symbols, and 4727 that if these are the text relocs they have not run into the 4728 data relocs. */ 4729 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 4730 && (reloff_ptr != &finfo->treloff 4731 || (*reloff_ptr 4732 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 4733 } 4734 4735 return TRUE; 4736} 4737 4738/* Adjust and write out the symbols for an a.out file. Set the new 4739 symbol indices into a symbol_map. */ 4740 4741static bfd_boolean 4742aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd) 4743{ 4744 bfd *output_bfd; 4745 bfd_size_type sym_count; 4746 char *strings; 4747 enum bfd_link_strip strip; 4748 enum bfd_link_discard discard; 4749 struct external_nlist *outsym; 4750 bfd_size_type strtab_index; 4751 struct external_nlist *sym; 4752 struct external_nlist *sym_end; 4753 struct aout_link_hash_entry **sym_hash; 4754 int *symbol_map; 4755 bfd_boolean pass; 4756 bfd_boolean skip_next; 4757 4758 output_bfd = finfo->output_bfd; 4759 sym_count = obj_aout_external_sym_count (input_bfd); 4760 strings = obj_aout_external_strings (input_bfd); 4761 strip = finfo->info->strip; 4762 discard = finfo->info->discard; 4763 outsym = finfo->output_syms; 4764 4765 /* First write out a symbol for this object file, unless we are 4766 discarding such symbols. */ 4767 if (strip != strip_all 4768 && (strip != strip_some 4769 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, 4770 FALSE, FALSE) != NULL) 4771 && discard != discard_all) 4772 { 4773 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4774 H_PUT_8 (output_bfd, 0, outsym->e_other); 4775 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4776 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4777 input_bfd->filename, FALSE); 4778 if (strtab_index == (bfd_size_type) -1) 4779 return FALSE; 4780 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4781 PUT_WORD (output_bfd, 4782 (bfd_get_section_vma (output_bfd, 4783 obj_textsec (input_bfd)->output_section) 4784 + obj_textsec (input_bfd)->output_offset), 4785 outsym->e_value); 4786 ++obj_aout_external_sym_count (output_bfd); 4787 ++outsym; 4788 } 4789 4790 pass = FALSE; 4791 skip_next = FALSE; 4792 sym = obj_aout_external_syms (input_bfd); 4793 sym_end = sym + sym_count; 4794 sym_hash = obj_aout_sym_hashes (input_bfd); 4795 symbol_map = finfo->symbol_map; 4796 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4797 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4798 { 4799 const char *name; 4800 int type; 4801 struct aout_link_hash_entry *h; 4802 bfd_boolean skip; 4803 asection *symsec; 4804 bfd_vma val = 0; 4805 bfd_boolean copy; 4806 4807 /* We set *symbol_map to 0 above for all symbols. If it has 4808 already been set to -1 for this symbol, it means that we are 4809 discarding it because it appears in a duplicate header file. 4810 See the N_BINCL code below. */ 4811 if (*symbol_map == -1) 4812 continue; 4813 4814 /* Initialize *symbol_map to -1, which means that the symbol was 4815 not copied into the output file. We will change it later if 4816 we do copy the symbol over. */ 4817 *symbol_map = -1; 4818 4819 type = H_GET_8 (input_bfd, sym->e_type); 4820 name = strings + GET_WORD (input_bfd, sym->e_strx); 4821 4822 h = NULL; 4823 4824 if (pass) 4825 { 4826 /* Pass this symbol through. It is the target of an 4827 indirect or warning symbol. */ 4828 val = GET_WORD (input_bfd, sym->e_value); 4829 pass = FALSE; 4830 } 4831 else if (skip_next) 4832 { 4833 /* Skip this symbol, which is the target of an indirect 4834 symbol that we have changed to no longer be an indirect 4835 symbol. */ 4836 skip_next = FALSE; 4837 continue; 4838 } 4839 else 4840 { 4841 struct aout_link_hash_entry *hresolve; 4842 4843 /* We have saved the hash table entry for this symbol, if 4844 there is one. Note that we could just look it up again 4845 in the hash table, provided we first check that it is an 4846 external symbol. */ 4847 h = *sym_hash; 4848 4849 /* Use the name from the hash table, in case the symbol was 4850 wrapped. */ 4851 if (h != NULL 4852 && h->root.type != bfd_link_hash_warning) 4853 name = h->root.root.string; 4854 4855 /* If this is an indirect or warning symbol, then change 4856 hresolve to the base symbol. We also change *sym_hash so 4857 that the relocation routines relocate against the real 4858 symbol. */ 4859 hresolve = h; 4860 if (h != (struct aout_link_hash_entry *) NULL 4861 && (h->root.type == bfd_link_hash_indirect 4862 || h->root.type == bfd_link_hash_warning)) 4863 { 4864 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4865 while (hresolve->root.type == bfd_link_hash_indirect 4866 || hresolve->root.type == bfd_link_hash_warning) 4867 hresolve = ((struct aout_link_hash_entry *) 4868 hresolve->root.u.i.link); 4869 *sym_hash = hresolve; 4870 } 4871 4872 /* If the symbol has already been written out, skip it. */ 4873 if (h != NULL 4874 && h->written) 4875 { 4876 if ((type & N_TYPE) == N_INDR 4877 || type == N_WARNING) 4878 skip_next = TRUE; 4879 *symbol_map = h->indx; 4880 continue; 4881 } 4882 4883 /* See if we are stripping this symbol. */ 4884 skip = FALSE; 4885 switch (strip) 4886 { 4887 case strip_none: 4888 break; 4889 case strip_debugger: 4890 if ((type & N_STAB) != 0) 4891 skip = TRUE; 4892 break; 4893 case strip_some: 4894 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) 4895 == NULL) 4896 skip = TRUE; 4897 break; 4898 case strip_all: 4899 skip = TRUE; 4900 break; 4901 } 4902 if (skip) 4903 { 4904 if (h != NULL) 4905 h->written = TRUE; 4906 continue; 4907 } 4908 4909 /* Get the value of the symbol. */ 4910 if ((type & N_TYPE) == N_TEXT 4911 || type == N_WEAKT) 4912 symsec = obj_textsec (input_bfd); 4913 else if ((type & N_TYPE) == N_DATA 4914 || type == N_WEAKD) 4915 symsec = obj_datasec (input_bfd); 4916 else if ((type & N_TYPE) == N_BSS 4917 || type == N_WEAKB) 4918 symsec = obj_bsssec (input_bfd); 4919 else if ((type & N_TYPE) == N_ABS 4920 || type == N_WEAKA) 4921 symsec = bfd_abs_section_ptr; 4922 else if (((type & N_TYPE) == N_INDR 4923 && (hresolve == NULL 4924 || (hresolve->root.type != bfd_link_hash_defined 4925 && hresolve->root.type != bfd_link_hash_defweak 4926 && hresolve->root.type != bfd_link_hash_common))) 4927 || type == N_WARNING) 4928 { 4929 /* Pass the next symbol through unchanged. The 4930 condition above for indirect symbols is so that if 4931 the indirect symbol was defined, we output it with 4932 the correct definition so the debugger will 4933 understand it. */ 4934 pass = TRUE; 4935 val = GET_WORD (input_bfd, sym->e_value); 4936 symsec = NULL; 4937 } 4938 else if ((type & N_STAB) != 0) 4939 { 4940 val = GET_WORD (input_bfd, sym->e_value); 4941 symsec = NULL; 4942 } 4943 else 4944 { 4945 /* If we get here with an indirect symbol, it means that 4946 we are outputting it with a real definition. In such 4947 a case we do not want to output the next symbol, 4948 which is the target of the indirection. */ 4949 if ((type & N_TYPE) == N_INDR) 4950 skip_next = TRUE; 4951 4952 symsec = NULL; 4953 4954 /* We need to get the value from the hash table. We use 4955 hresolve so that if we have defined an indirect 4956 symbol we output the final definition. */ 4957 if (h == NULL) 4958 { 4959 switch (type & N_TYPE) 4960 { 4961 case N_SETT: 4962 symsec = obj_textsec (input_bfd); 4963 break; 4964 case N_SETD: 4965 symsec = obj_datasec (input_bfd); 4966 break; 4967 case N_SETB: 4968 symsec = obj_bsssec (input_bfd); 4969 break; 4970 case N_SETA: 4971 symsec = bfd_abs_section_ptr; 4972 break; 4973 default: 4974 val = 0; 4975 break; 4976 } 4977 } 4978 else if (hresolve->root.type == bfd_link_hash_defined 4979 || hresolve->root.type == bfd_link_hash_defweak) 4980 { 4981 asection *input_section; 4982 asection *output_section; 4983 4984 /* This case usually means a common symbol which was 4985 turned into a defined symbol. */ 4986 input_section = hresolve->root.u.def.section; 4987 output_section = input_section->output_section; 4988 BFD_ASSERT (bfd_is_abs_section (output_section) 4989 || output_section->owner == output_bfd); 4990 val = (hresolve->root.u.def.value 4991 + bfd_get_section_vma (output_bfd, output_section) 4992 + input_section->output_offset); 4993 4994 /* Get the correct type based on the section. If 4995 this is a constructed set, force it to be 4996 globally visible. */ 4997 if (type == N_SETT 4998 || type == N_SETD 4999 || type == N_SETB 5000 || type == N_SETA) 5001 type |= N_EXT; 5002 5003 type &=~ N_TYPE; 5004 5005 if (output_section == obj_textsec (output_bfd)) 5006 type |= (hresolve->root.type == bfd_link_hash_defined 5007 ? N_TEXT 5008 : N_WEAKT); 5009 else if (output_section == obj_datasec (output_bfd)) 5010 type |= (hresolve->root.type == bfd_link_hash_defined 5011 ? N_DATA 5012 : N_WEAKD); 5013 else if (output_section == obj_bsssec (output_bfd)) 5014 type |= (hresolve->root.type == bfd_link_hash_defined 5015 ? N_BSS 5016 : N_WEAKB); 5017 else 5018 type |= (hresolve->root.type == bfd_link_hash_defined 5019 ? N_ABS 5020 : N_WEAKA); 5021 } 5022 else if (hresolve->root.type == bfd_link_hash_common) 5023 val = hresolve->root.u.c.size; 5024 else if (hresolve->root.type == bfd_link_hash_undefweak) 5025 { 5026 val = 0; 5027 type = N_WEAKU; 5028 } 5029 else 5030 val = 0; 5031 } 5032 if (symsec != NULL) 5033 val = (symsec->output_section->vma 5034 + symsec->output_offset 5035 + (GET_WORD (input_bfd, sym->e_value) 5036 - symsec->vma)); 5037 5038 /* If this is a global symbol set the written flag, and if 5039 it is a local symbol see if we should discard it. */ 5040 if (h != NULL) 5041 { 5042 h->written = TRUE; 5043 h->indx = obj_aout_external_sym_count (output_bfd); 5044 } 5045 else if ((type & N_TYPE) != N_SETT 5046 && (type & N_TYPE) != N_SETD 5047 && (type & N_TYPE) != N_SETB 5048 && (type & N_TYPE) != N_SETA) 5049 { 5050 switch (discard) 5051 { 5052 case discard_none: 5053 case discard_sec_merge: 5054 break; 5055 case discard_l: 5056 if ((type & N_STAB) == 0 5057 && bfd_is_local_label_name (input_bfd, name)) 5058 skip = TRUE; 5059 break; 5060 case discard_all: 5061 skip = TRUE; 5062 break; 5063 } 5064 if (skip) 5065 { 5066 pass = FALSE; 5067 continue; 5068 } 5069 } 5070 5071 /* An N_BINCL symbol indicates the start of the stabs 5072 entries for a header file. We need to scan ahead to the 5073 next N_EINCL symbol, ignoring nesting, adding up all the 5074 characters in the symbol names, not including the file 5075 numbers in types (the first number after an open 5076 parenthesis). */ 5077 if (type == (int) N_BINCL) 5078 { 5079 struct external_nlist *incl_sym; 5080 int nest; 5081 struct aout_link_includes_entry *incl_entry; 5082 struct aout_link_includes_totals *t; 5083 5084 val = 0; 5085 nest = 0; 5086 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 5087 { 5088 int incl_type; 5089 5090 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5091 if (incl_type == (int) N_EINCL) 5092 { 5093 if (nest == 0) 5094 break; 5095 --nest; 5096 } 5097 else if (incl_type == (int) N_BINCL) 5098 ++nest; 5099 else if (nest == 0) 5100 { 5101 const char *s; 5102 5103 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 5104 for (; *s != '\0'; s++) 5105 { 5106 val += *s; 5107 if (*s == '(') 5108 { 5109 /* Skip the file number. */ 5110 ++s; 5111 while (ISDIGIT (*s)) 5112 ++s; 5113 --s; 5114 } 5115 } 5116 } 5117 } 5118 5119 /* If we have already included a header file with the 5120 same value, then replace this one with an N_EXCL 5121 symbol. */ 5122 copy = (bfd_boolean) (! finfo->info->keep_memory); 5123 incl_entry = aout_link_includes_lookup (&finfo->includes, 5124 name, TRUE, copy); 5125 if (incl_entry == NULL) 5126 return FALSE; 5127 for (t = incl_entry->totals; t != NULL; t = t->next) 5128 if (t->total == val) 5129 break; 5130 if (t == NULL) 5131 { 5132 /* This is the first time we have seen this header 5133 file with this set of stabs strings. */ 5134 t = bfd_hash_allocate (&finfo->includes.root, 5135 sizeof *t); 5136 if (t == NULL) 5137 return FALSE; 5138 t->total = val; 5139 t->next = incl_entry->totals; 5140 incl_entry->totals = t; 5141 } 5142 else 5143 { 5144 int *incl_map; 5145 5146 /* This is a duplicate header file. We must change 5147 it to be an N_EXCL entry, and mark all the 5148 included symbols to prevent outputting them. */ 5149 type = (int) N_EXCL; 5150 5151 nest = 0; 5152 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 5153 incl_sym < sym_end; 5154 incl_sym++, incl_map++) 5155 { 5156 int incl_type; 5157 5158 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 5159 if (incl_type == (int) N_EINCL) 5160 { 5161 if (nest == 0) 5162 { 5163 *incl_map = -1; 5164 break; 5165 } 5166 --nest; 5167 } 5168 else if (incl_type == (int) N_BINCL) 5169 ++nest; 5170 else if (nest == 0) 5171 *incl_map = -1; 5172 } 5173 } 5174 } 5175 } 5176 5177 /* Copy this symbol into the list of symbols we are going to 5178 write out. */ 5179 H_PUT_8 (output_bfd, type, outsym->e_type); 5180 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 5181 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 5182 copy = FALSE; 5183 if (! finfo->info->keep_memory) 5184 { 5185 /* name points into a string table which we are going to 5186 free. If there is a hash table entry, use that string. 5187 Otherwise, copy name into memory. */ 5188 if (h != NULL) 5189 name = h->root.root.string; 5190 else 5191 copy = TRUE; 5192 } 5193 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 5194 name, copy); 5195 if (strtab_index == (bfd_size_type) -1) 5196 return FALSE; 5197 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 5198 PUT_WORD (output_bfd, val, outsym->e_value); 5199 *symbol_map = obj_aout_external_sym_count (output_bfd); 5200 ++obj_aout_external_sym_count (output_bfd); 5201 ++outsym; 5202 } 5203 5204 /* Write out the output symbols we have just constructed. */ 5205 if (outsym > finfo->output_syms) 5206 { 5207 bfd_size_type outsym_size; 5208 5209 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) 5210 return FALSE; 5211 outsym_size = outsym - finfo->output_syms; 5212 outsym_size *= EXTERNAL_NLIST_SIZE; 5213 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd) 5214 != outsym_size) 5215 return FALSE; 5216 finfo->symoff += outsym_size; 5217 } 5218 5219 return TRUE; 5220} 5221 5222/* Link an a.out input BFD into the output file. */ 5223 5224static bfd_boolean 5225aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd) 5226{ 5227 bfd_size_type sym_count; 5228 5229 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 5230 5231 /* If this is a dynamic object, it may need special handling. */ 5232 if ((input_bfd->flags & DYNAMIC) != 0 5233 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 5234 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 5235 (finfo->info, input_bfd)); 5236 5237 /* Get the symbols. We probably have them already, unless 5238 finfo->info->keep_memory is FALSE. */ 5239 if (! aout_get_external_symbols (input_bfd)) 5240 return FALSE; 5241 5242 sym_count = obj_aout_external_sym_count (input_bfd); 5243 5244 /* Write out the symbols and get a map of the new indices. The map 5245 is placed into finfo->symbol_map. */ 5246 if (! aout_link_write_symbols (finfo, input_bfd)) 5247 return FALSE; 5248 5249 /* Relocate and write out the sections. These functions use the 5250 symbol map created by aout_link_write_symbols. The linker_mark 5251 field will be set if these sections are to be included in the 5252 link, which will normally be the case. */ 5253 if (obj_textsec (input_bfd)->linker_mark) 5254 { 5255 if (! aout_link_input_section (finfo, input_bfd, 5256 obj_textsec (input_bfd), 5257 &finfo->treloff, 5258 exec_hdr (input_bfd)->a_trsize)) 5259 return FALSE; 5260 } 5261 if (obj_datasec (input_bfd)->linker_mark) 5262 { 5263 if (! aout_link_input_section (finfo, input_bfd, 5264 obj_datasec (input_bfd), 5265 &finfo->dreloff, 5266 exec_hdr (input_bfd)->a_drsize)) 5267 return FALSE; 5268 } 5269 5270 /* If we are not keeping memory, we don't need the symbols any 5271 longer. We still need them if we are keeping memory, because the 5272 strings in the hash table point into them. */ 5273 if (! finfo->info->keep_memory) 5274 { 5275 if (! aout_link_free_symbols (input_bfd)) 5276 return FALSE; 5277 } 5278 5279 return TRUE; 5280} 5281 5282/* Do the final link step. This is called on the output BFD. The 5283 INFO structure should point to a list of BFDs linked through the 5284 link_next field which can be used to find each BFD which takes part 5285 in the output. Also, each section in ABFD should point to a list 5286 of bfd_link_order structures which list all the input sections for 5287 the output section. */ 5288 5289bfd_boolean 5290NAME (aout, final_link) (bfd *abfd, 5291 struct bfd_link_info *info, 5292 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) 5293{ 5294 struct aout_final_link_info aout_info; 5295 bfd_boolean includes_hash_initialized = FALSE; 5296 bfd *sub; 5297 bfd_size_type trsize, drsize; 5298 bfd_size_type max_contents_size; 5299 bfd_size_type max_relocs_size; 5300 bfd_size_type max_sym_count; 5301 bfd_size_type text_size; 5302 file_ptr text_end; 5303 struct bfd_link_order *p; 5304 asection *o; 5305 bfd_boolean have_link_order_relocs; 5306 5307 if (info->shared) 5308 abfd->flags |= DYNAMIC; 5309 5310 aout_info.info = info; 5311 aout_info.output_bfd = abfd; 5312 aout_info.contents = NULL; 5313 aout_info.relocs = NULL; 5314 aout_info.symbol_map = NULL; 5315 aout_info.output_syms = NULL; 5316 5317 if (!bfd_hash_table_init_n (&aout_info.includes.root, 5318 aout_link_includes_newfunc, 5319 sizeof (struct aout_link_includes_entry), 5320 251)) 5321 goto error_return; 5322 includes_hash_initialized = TRUE; 5323 5324 /* Figure out the largest section size. Also, if generating 5325 relocatable output, count the relocs. */ 5326 trsize = 0; 5327 drsize = 0; 5328 max_contents_size = 0; 5329 max_relocs_size = 0; 5330 max_sym_count = 0; 5331 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 5332 { 5333 bfd_size_type sz; 5334 5335 if (info->relocatable) 5336 { 5337 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5338 { 5339 trsize += exec_hdr (sub)->a_trsize; 5340 drsize += exec_hdr (sub)->a_drsize; 5341 } 5342 else 5343 { 5344 /* FIXME: We need to identify the .text and .data sections 5345 and call get_reloc_upper_bound and canonicalize_reloc to 5346 work out the number of relocs needed, and then multiply 5347 by the reloc size. */ 5348 (*_bfd_error_handler) 5349 (_("%s: relocatable link from %s to %s not supported"), 5350 bfd_get_filename (abfd), 5351 sub->xvec->name, abfd->xvec->name); 5352 bfd_set_error (bfd_error_invalid_operation); 5353 goto error_return; 5354 } 5355 } 5356 5357 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 5358 { 5359 sz = obj_textsec (sub)->size; 5360 if (sz > max_contents_size) 5361 max_contents_size = sz; 5362 sz = obj_datasec (sub)->size; 5363 if (sz > max_contents_size) 5364 max_contents_size = sz; 5365 5366 sz = exec_hdr (sub)->a_trsize; 5367 if (sz > max_relocs_size) 5368 max_relocs_size = sz; 5369 sz = exec_hdr (sub)->a_drsize; 5370 if (sz > max_relocs_size) 5371 max_relocs_size = sz; 5372 5373 sz = obj_aout_external_sym_count (sub); 5374 if (sz > max_sym_count) 5375 max_sym_count = sz; 5376 } 5377 } 5378 5379 if (info->relocatable) 5380 { 5381 if (obj_textsec (abfd) != NULL) 5382 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 5383 ->map_head.link_order) 5384 * obj_reloc_entry_size (abfd)); 5385 if (obj_datasec (abfd) != NULL) 5386 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 5387 ->map_head.link_order) 5388 * obj_reloc_entry_size (abfd)); 5389 } 5390 5391 exec_hdr (abfd)->a_trsize = trsize; 5392 exec_hdr (abfd)->a_drsize = drsize; 5393 5394 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 5395 5396 /* Adjust the section sizes and vmas according to the magic number. 5397 This sets a_text, a_data and a_bss in the exec_hdr and sets the 5398 filepos for each section. */ 5399 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 5400 goto error_return; 5401 5402 /* The relocation and symbol file positions differ among a.out 5403 targets. We are passed a callback routine from the backend 5404 specific code to handle this. 5405 FIXME: At this point we do not know how much space the symbol 5406 table will require. This will not work for any (nonstandard) 5407 a.out target that needs to know the symbol table size before it 5408 can compute the relocation file positions. This may or may not 5409 be the case for the hp300hpux target, for example. */ 5410 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 5411 &aout_info.symoff); 5412 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 5413 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 5414 obj_sym_filepos (abfd) = aout_info.symoff; 5415 5416 /* We keep a count of the symbols as we output them. */ 5417 obj_aout_external_sym_count (abfd) = 0; 5418 5419 /* We accumulate the string table as we write out the symbols. */ 5420 aout_info.strtab = _bfd_stringtab_init (); 5421 if (aout_info.strtab == NULL) 5422 goto error_return; 5423 5424 /* Allocate buffers to hold section contents and relocs. */ 5425 aout_info.contents = bfd_malloc (max_contents_size); 5426 aout_info.relocs = bfd_malloc (max_relocs_size); 5427 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *)); 5428 aout_info.output_syms = bfd_malloc ((max_sym_count + 1) 5429 * sizeof (struct external_nlist)); 5430 if ((aout_info.contents == NULL && max_contents_size != 0) 5431 || (aout_info.relocs == NULL && max_relocs_size != 0) 5432 || (aout_info.symbol_map == NULL && max_sym_count != 0) 5433 || aout_info.output_syms == NULL) 5434 goto error_return; 5435 5436 /* If we have a symbol named __DYNAMIC, force it out now. This is 5437 required by SunOS. Doing this here rather than in sunos.c is a 5438 hack, but it's easier than exporting everything which would be 5439 needed. */ 5440 { 5441 struct aout_link_hash_entry *h; 5442 5443 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 5444 FALSE, FALSE, FALSE); 5445 if (h != NULL) 5446 aout_link_write_other_symbol (h, &aout_info); 5447 } 5448 5449 /* The most time efficient way to do the link would be to read all 5450 the input object files into memory and then sort out the 5451 information into the output file. Unfortunately, that will 5452 probably use too much memory. Another method would be to step 5453 through everything that composes the text section and write it 5454 out, and then everything that composes the data section and write 5455 it out, and then write out the relocs, and then write out the 5456 symbols. Unfortunately, that requires reading stuff from each 5457 input file several times, and we will not be able to keep all the 5458 input files open simultaneously, and reopening them will be slow. 5459 5460 What we do is basically process one input file at a time. We do 5461 everything we need to do with an input file once--copy over the 5462 section contents, handle the relocation information, and write 5463 out the symbols--and then we throw away the information we read 5464 from it. This approach requires a lot of lseeks of the output 5465 file, which is unfortunate but still faster than reopening a lot 5466 of files. 5467 5468 We use the output_has_begun field of the input BFDs to see 5469 whether we have already handled it. */ 5470 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 5471 sub->output_has_begun = FALSE; 5472 5473 /* Mark all sections which are to be included in the link. This 5474 will normally be every section. We need to do this so that we 5475 can identify any sections which the linker has decided to not 5476 include. */ 5477 for (o = abfd->sections; o != NULL; o = o->next) 5478 { 5479 for (p = o->map_head.link_order; p != NULL; p = p->next) 5480 if (p->type == bfd_indirect_link_order) 5481 p->u.indirect.section->linker_mark = TRUE; 5482 } 5483 5484 have_link_order_relocs = FALSE; 5485 for (o = abfd->sections; o != NULL; o = o->next) 5486 { 5487 for (p = o->map_head.link_order; 5488 p != NULL; 5489 p = p->next) 5490 { 5491 if (p->type == bfd_indirect_link_order 5492 && (bfd_get_flavour (p->u.indirect.section->owner) 5493 == bfd_target_aout_flavour)) 5494 { 5495 bfd *input_bfd; 5496 5497 input_bfd = p->u.indirect.section->owner; 5498 if (! input_bfd->output_has_begun) 5499 { 5500 if (! aout_link_input_bfd (&aout_info, input_bfd)) 5501 goto error_return; 5502 input_bfd->output_has_begun = TRUE; 5503 } 5504 } 5505 else if (p->type == bfd_section_reloc_link_order 5506 || p->type == bfd_symbol_reloc_link_order) 5507 { 5508 /* These are handled below. */ 5509 have_link_order_relocs = TRUE; 5510 } 5511 else 5512 { 5513 if (! _bfd_default_link_order (abfd, info, o, p)) 5514 goto error_return; 5515 } 5516 } 5517 } 5518 5519 /* Write out any symbols that we have not already written out. */ 5520 aout_link_hash_traverse (aout_hash_table (info), 5521 aout_link_write_other_symbol, 5522 (void *) &aout_info); 5523 5524 /* Now handle any relocs we were asked to create by the linker. 5525 These did not come from any input file. We must do these after 5526 we have written out all the symbols, so that we know the symbol 5527 indices to use. */ 5528 if (have_link_order_relocs) 5529 { 5530 for (o = abfd->sections; o != NULL; o = o->next) 5531 { 5532 for (p = o->map_head.link_order; 5533 p != NULL; 5534 p = p->next) 5535 { 5536 if (p->type == bfd_section_reloc_link_order 5537 || p->type == bfd_symbol_reloc_link_order) 5538 { 5539 if (! aout_link_reloc_link_order (&aout_info, o, p)) 5540 goto error_return; 5541 } 5542 } 5543 } 5544 } 5545 5546 if (aout_info.contents != NULL) 5547 { 5548 free (aout_info.contents); 5549 aout_info.contents = NULL; 5550 } 5551 if (aout_info.relocs != NULL) 5552 { 5553 free (aout_info.relocs); 5554 aout_info.relocs = NULL; 5555 } 5556 if (aout_info.symbol_map != NULL) 5557 { 5558 free (aout_info.symbol_map); 5559 aout_info.symbol_map = NULL; 5560 } 5561 if (aout_info.output_syms != NULL) 5562 { 5563 free (aout_info.output_syms); 5564 aout_info.output_syms = NULL; 5565 } 5566 if (includes_hash_initialized) 5567 { 5568 bfd_hash_table_free (&aout_info.includes.root); 5569 includes_hash_initialized = FALSE; 5570 } 5571 5572 /* Finish up any dynamic linking we may be doing. */ 5573 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 5574 { 5575 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 5576 goto error_return; 5577 } 5578 5579 /* Update the header information. */ 5580 abfd->symcount = obj_aout_external_sym_count (abfd); 5581 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 5582 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 5583 obj_textsec (abfd)->reloc_count = 5584 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 5585 obj_datasec (abfd)->reloc_count = 5586 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 5587 5588 /* Write out the string table, unless there are no symbols. */ 5589 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0) 5590 goto error_return; 5591 if (abfd->symcount > 0) 5592 { 5593 if (!emit_stringtab (abfd, aout_info.strtab)) 5594 goto error_return; 5595 } 5596 else 5597 { 5598 bfd_byte b[BYTES_IN_WORD]; 5599 5600 memset (b, 0, BYTES_IN_WORD); 5601 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD) 5602 goto error_return; 5603 } 5604 5605 return TRUE; 5606 5607 error_return: 5608 if (aout_info.contents != NULL) 5609 free (aout_info.contents); 5610 if (aout_info.relocs != NULL) 5611 free (aout_info.relocs); 5612 if (aout_info.symbol_map != NULL) 5613 free (aout_info.symbol_map); 5614 if (aout_info.output_syms != NULL) 5615 free (aout_info.output_syms); 5616 if (includes_hash_initialized) 5617 bfd_hash_table_free (&aout_info.includes.root); 5618 return FALSE; 5619} 5620