aoutx.h revision 94536
1/* BFD semi-generic back-end for a.out binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 3 2001, 2002 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7This file is part of BFD, the Binary File Descriptor library. 8 9This program is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2 of the License, or 12(at your option) any later version. 13 14This program is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with this program; if not, write to the Free Software 21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 22 23/* 24SECTION 25 a.out backends 26 27DESCRIPTION 28 29 BFD supports a number of different flavours of a.out format, 30 though the major differences are only the sizes of the 31 structures on disk, and the shape of the relocation 32 information. 33 34 The support is split into a basic support file @file{aoutx.h} 35 and other files which derive functions from the base. One 36 derivation file is @file{aoutf1.h} (for a.out flavour 1), and 37 adds to the basic a.out functions support for sun3, sun4, 386 38 and 29k a.out files, to create a target jump vector for a 39 specific target. 40 41 This information is further split out into more specific files 42 for each machine, including @file{sunos.c} for sun3 and sun4, 43 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a 44 demonstration of a 64 bit a.out format. 45 46 The base file @file{aoutx.h} defines general mechanisms for 47 reading and writing records to and from disk and various 48 other methods which BFD requires. It is included by 49 @file{aout32.c} and @file{aout64.c} to form the names 50 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. 51 52 As an example, this is what goes on to make the back end for a 53 sun4, from @file{aout32.c}: 54 55| #define ARCH_SIZE 32 56| #include "aoutx.h" 57 58 Which exports names: 59 60| ... 61| aout_32_canonicalize_reloc 62| aout_32_find_nearest_line 63| aout_32_get_lineno 64| aout_32_get_reloc_upper_bound 65| ... 66 67 from @file{sunos.c}: 68 69| #define TARGET_NAME "a.out-sunos-big" 70| #define VECNAME sunos_big_vec 71| #include "aoutf1.h" 72 73 requires all the names from @file{aout32.c}, and produces the jump vector 74 75| sunos_big_vec 76 77 The file @file{host-aout.c} is a special case. It is for a large set 78 of hosts that use ``more or less standard'' a.out files, and 79 for which cross-debugging is not interesting. It uses the 80 standard 32-bit a.out support routines, but determines the 81 file offsets and addresses of the text, data, and BSS 82 sections, the machine architecture and machine type, and the 83 entry point address, in a host-dependent manner. Once these 84 values have been determined, generic code is used to handle 85 the object file. 86 87 When porting it to run on a new system, you must supply: 88 89| HOST_PAGE_SIZE 90| HOST_SEGMENT_SIZE 91| HOST_MACHINE_ARCH (optional) 92| HOST_MACHINE_MACHINE (optional) 93| HOST_TEXT_START_ADDR 94| HOST_STACK_END_ADDR 95 96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These 97 values, plus the structures and macros defined in @file{a.out.h} on 98 your host system, will produce a BFD target that will access 99 ordinary a.out files on your host. To configure a new machine 100 to use @file{host-aout.c}, specify: 101 102| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec 103| TDEPFILES= host-aout.o trad-core.o 104 105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in} 106 to use the 107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your 108 configuration is selected. 109 110*/ 111 112/* Some assumptions: 113 * Any BFD with D_PAGED set is ZMAGIC, and vice versa. 114 Doesn't matter what the setting of WP_TEXT is on output, but it'll 115 get set on input. 116 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. 117 * Any BFD with both flags clear is OMAGIC. 118 (Just want to make these explicit, so the conditions tested in this 119 file make sense if you're more familiar with a.out than with BFD.) */ 120 121#define KEEPIT udata.i 122 123#include "bfd.h" 124#include "sysdep.h" 125#include "safe-ctype.h" 126#include "bfdlink.h" 127 128#include "libaout.h" 129#include "libbfd.h" 130#include "aout/aout64.h" 131#include "aout/stab_gnu.h" 132#include "aout/ar.h" 133 134static boolean aout_get_external_symbols PARAMS ((bfd *)); 135static boolean translate_from_native_sym_flags 136 PARAMS ((bfd *, aout_symbol_type *)); 137static boolean translate_to_native_sym_flags 138 PARAMS ((bfd *, asymbol *, struct external_nlist *)); 139static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *)); 140static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *)); 141static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *)); 142reloc_howto_type * NAME(aout,reloc_type_lookup) 143 PARAMS ((bfd *, bfd_reloc_code_real_type)); 144 145/* 146SUBSECTION 147 Relocations 148 149DESCRIPTION 150 The file @file{aoutx.h} provides for both the @emph{standard} 151 and @emph{extended} forms of a.out relocation records. 152 153 The standard records contain only an 154 address, a symbol index, and a type field. The extended records 155 (used on 29ks and sparcs) also have a full integer for an 156 addend. 157 158*/ 159#ifndef CTOR_TABLE_RELOC_HOWTO 160#define CTOR_TABLE_RELOC_IDX 2 161#define CTOR_TABLE_RELOC_HOWTO(BFD) \ 162 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \ 163 ? howto_table_ext : howto_table_std) \ 164 + CTOR_TABLE_RELOC_IDX) 165#endif 166 167#ifndef MY_swap_std_reloc_in 168#define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in) 169#endif 170 171#ifndef MY_swap_ext_reloc_in 172#define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in) 173#endif 174 175#ifndef MY_swap_std_reloc_out 176#define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out) 177#endif 178 179#ifndef MY_swap_ext_reloc_out 180#define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out) 181#endif 182 183#ifndef MY_final_link_relocate 184#define MY_final_link_relocate _bfd_final_link_relocate 185#endif 186 187#ifndef MY_relocate_contents 188#define MY_relocate_contents _bfd_relocate_contents 189#endif 190 191#define howto_table_ext NAME(aout,ext_howto_table) 192#define howto_table_std NAME(aout,std_howto_table) 193 194reloc_howto_type howto_table_ext[] = 195{ 196 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ 197 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false), 198 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false), 199 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false), 200 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false), 201 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false), 202 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false), 203 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false), 204 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false), 205 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false), 206 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false), 207 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false), 208 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false), 209 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false), 210 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false), 211 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false), 212 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false), 213 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false), 214 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true), 215 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true), 216 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false), 217 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false), 218 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false), 219 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false), 220 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), 221 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), 222 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), 223#define RELOC_SPARC_REV32 RELOC_WDISP19 224 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false), 225}; 226 227/* Convert standard reloc records to "arelent" format (incl byte swap). */ 228 229reloc_howto_type howto_table_std[] = { 230 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ 231HOWTO ( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false), 232HOWTO ( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false), 233HOWTO ( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false), 234HOWTO ( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false), 235HOWTO ( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false), 236HOWTO ( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false), 237HOWTO ( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false), 238HOWTO ( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false), 239HOWTO ( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false), 240HOWTO ( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false), 241HOWTO (10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false), 242EMPTY_HOWTO (-1), 243EMPTY_HOWTO (-1), 244EMPTY_HOWTO (-1), 245EMPTY_HOWTO (-1), 246EMPTY_HOWTO (-1), 247 HOWTO (16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false), 248EMPTY_HOWTO (-1), 249EMPTY_HOWTO (-1), 250EMPTY_HOWTO (-1), 251EMPTY_HOWTO (-1), 252EMPTY_HOWTO (-1), 253EMPTY_HOWTO (-1), 254EMPTY_HOWTO (-1), 255EMPTY_HOWTO (-1), 256EMPTY_HOWTO (-1), 257EMPTY_HOWTO (-1), 258EMPTY_HOWTO (-1), 259EMPTY_HOWTO (-1), 260EMPTY_HOWTO (-1), 261EMPTY_HOWTO (-1), 262EMPTY_HOWTO (-1), 263 HOWTO (32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), 264EMPTY_HOWTO (-1), 265EMPTY_HOWTO (-1), 266EMPTY_HOWTO (-1), 267EMPTY_HOWTO (-1), 268EMPTY_HOWTO (-1), 269EMPTY_HOWTO (-1), 270EMPTY_HOWTO (-1), 271 HOWTO (40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false), 272}; 273 274#define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0])) 275 276reloc_howto_type * 277NAME(aout,reloc_type_lookup) (abfd,code) 278 bfd *abfd; 279 bfd_reloc_code_real_type code; 280{ 281#define EXT(i, j) case i: return &howto_table_ext[j] 282#define STD(i, j) case i: return &howto_table_std[j] 283 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 284 if (code == BFD_RELOC_CTOR) 285 switch (bfd_get_arch_info (abfd)->bits_per_address) 286 { 287 case 32: 288 code = BFD_RELOC_32; 289 break; 290 case 64: 291 code = BFD_RELOC_64; 292 break; 293 } 294 if (ext) 295 switch (code) 296 { 297 EXT (BFD_RELOC_8, 0); 298 EXT (BFD_RELOC_16, 1); 299 EXT (BFD_RELOC_32, 2); 300 EXT (BFD_RELOC_HI22, 8); 301 EXT (BFD_RELOC_LO10, 11); 302 EXT (BFD_RELOC_32_PCREL_S2, 6); 303 EXT (BFD_RELOC_SPARC_WDISP22, 7); 304 EXT (BFD_RELOC_SPARC13, 10); 305 EXT (BFD_RELOC_SPARC_GOT10, 14); 306 EXT (BFD_RELOC_SPARC_BASE13, 15); 307 EXT (BFD_RELOC_SPARC_GOT13, 15); 308 EXT (BFD_RELOC_SPARC_GOT22, 16); 309 EXT (BFD_RELOC_SPARC_PC10, 17); 310 EXT (BFD_RELOC_SPARC_PC22, 18); 311 EXT (BFD_RELOC_SPARC_WPLT30, 19); 312 EXT (BFD_RELOC_SPARC_REV32, 26); 313 default: return (reloc_howto_type *) NULL; 314 } 315 else 316 /* std relocs */ 317 switch (code) 318 { 319 STD (BFD_RELOC_16, 1); 320 STD (BFD_RELOC_32, 2); 321 STD (BFD_RELOC_8_PCREL, 4); 322 STD (BFD_RELOC_16_PCREL, 5); 323 STD (BFD_RELOC_32_PCREL, 6); 324 STD (BFD_RELOC_16_BASEREL, 9); 325 STD (BFD_RELOC_32_BASEREL, 10); 326 default: return (reloc_howto_type *) NULL; 327 } 328} 329 330/* 331SUBSECTION 332 Internal entry points 333 334DESCRIPTION 335 @file{aoutx.h} exports several routines for accessing the 336 contents of an a.out file, which are gathered and exported in 337 turn by various format specific files (eg sunos.c). 338 339*/ 340 341/* 342FUNCTION 343 aout_@var{size}_swap_exec_header_in 344 345SYNOPSIS 346 void aout_@var{size}_swap_exec_header_in, 347 (bfd *abfd, 348 struct external_exec *raw_bytes, 349 struct internal_exec *execp); 350 351DESCRIPTION 352 Swap the information in an executable header @var{raw_bytes} taken 353 from a raw byte stream memory image into the internal exec header 354 structure @var{execp}. 355*/ 356 357#ifndef NAME_swap_exec_header_in 358void 359NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp) 360 bfd *abfd; 361 struct external_exec *raw_bytes; 362 struct internal_exec *execp; 363{ 364 struct external_exec *bytes = (struct external_exec *)raw_bytes; 365 366 /* The internal_exec structure has some fields that are unused in this 367 configuration (IE for i960), so ensure that all such uninitialized 368 fields are zero'd out. There are places where two of these structs 369 are memcmp'd, and thus the contents do matter. */ 370 memset ((PTR) execp, 0, sizeof (struct internal_exec)); 371 /* Now fill in fields in the execp, from the bytes in the raw data. */ 372 execp->a_info = H_GET_32 (abfd, bytes->e_info); 373 execp->a_text = GET_WORD (abfd, bytes->e_text); 374 execp->a_data = GET_WORD (abfd, bytes->e_data); 375 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 376 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 377 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 378 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 379 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 380} 381#define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in) 382#endif 383 384/* 385FUNCTION 386 aout_@var{size}_swap_exec_header_out 387 388SYNOPSIS 389 void aout_@var{size}_swap_exec_header_out 390 (bfd *abfd, 391 struct internal_exec *execp, 392 struct external_exec *raw_bytes); 393 394DESCRIPTION 395 Swap the information in an internal exec header structure 396 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 397*/ 398void 399NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes) 400 bfd *abfd; 401 struct internal_exec *execp; 402 struct external_exec *raw_bytes; 403{ 404 struct external_exec *bytes = (struct external_exec *)raw_bytes; 405 406 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 407 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 408 PUT_WORD (abfd, execp->a_text , bytes->e_text); 409 PUT_WORD (abfd, execp->a_data , bytes->e_data); 410 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 411 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 412 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 413 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 414 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 415} 416 417/* Make all the section for an a.out file. */ 418 419boolean 420NAME(aout,make_sections) (abfd) 421 bfd *abfd; 422{ 423 if (obj_textsec (abfd) == (asection *) NULL 424 && bfd_make_section (abfd, ".text") == (asection *) NULL) 425 return false; 426 if (obj_datasec (abfd) == (asection *) NULL 427 && bfd_make_section (abfd, ".data") == (asection *) NULL) 428 return false; 429 if (obj_bsssec (abfd) == (asection *) NULL 430 && bfd_make_section (abfd, ".bss") == (asection *) NULL) 431 return false; 432 return true; 433} 434 435/* 436FUNCTION 437 aout_@var{size}_some_aout_object_p 438 439SYNOPSIS 440 const bfd_target *aout_@var{size}_some_aout_object_p 441 (bfd *abfd, 442 const bfd_target *(*callback_to_real_object_p) ()); 443 444DESCRIPTION 445 Some a.out variant thinks that the file open in @var{abfd} 446 checking is an a.out file. Do some more checking, and set up 447 for access if it really is. Call back to the calling 448 environment's "finish up" function just before returning, to 449 handle any last-minute setup. 450*/ 451 452const bfd_target * 453NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p) 454 bfd *abfd; 455 struct internal_exec *execp; 456 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); 457{ 458 struct aout_data_struct *rawptr, *oldrawptr; 459 const bfd_target *result; 460 bfd_size_type amt = sizeof (struct aout_data_struct); 461 462 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 463 if (rawptr == NULL) 464 return 0; 465 466 oldrawptr = abfd->tdata.aout_data; 467 abfd->tdata.aout_data = rawptr; 468 469 /* Copy the contents of the old tdata struct. 470 In particular, we want the subformat, since for hpux it was set in 471 hp300hpux.c:swap_exec_header_in and will be used in 472 hp300hpux.c:callback. */ 473 if (oldrawptr != NULL) 474 *abfd->tdata.aout_data = *oldrawptr; 475 476 abfd->tdata.aout_data->a.hdr = &rawptr->e; 477 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */ 478 execp = abfd->tdata.aout_data->a.hdr; 479 480 /* Set the file flags */ 481 abfd->flags = BFD_NO_FLAGS; 482 if (execp->a_drsize || execp->a_trsize) 483 abfd->flags |= HAS_RELOC; 484 /* Setting of EXEC_P has been deferred to the bottom of this function */ 485 if (execp->a_syms) 486 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 487 if (N_DYNAMIC (*execp)) 488 abfd->flags |= DYNAMIC; 489 490 if (N_MAGIC (*execp) == ZMAGIC) 491 { 492 abfd->flags |= D_PAGED | WP_TEXT; 493 adata (abfd).magic = z_magic; 494 } 495 else if (N_MAGIC (*execp) == QMAGIC) 496 { 497 abfd->flags |= D_PAGED | WP_TEXT; 498 adata (abfd).magic = z_magic; 499 adata (abfd).subformat = q_magic_format; 500 } 501 else if (N_MAGIC (*execp) == NMAGIC) 502 { 503 abfd->flags |= WP_TEXT; 504 adata (abfd).magic = n_magic; 505 } 506 else if (N_MAGIC (*execp) == OMAGIC 507 || N_MAGIC (*execp) == BMAGIC) 508 adata (abfd).magic = o_magic; 509 else 510 { 511 /* Should have been checked with N_BADMAG before this routine 512 was called. */ 513 abort (); 514 } 515 516 bfd_get_start_address (abfd) = execp->a_entry; 517 518 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; 519 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 520 521 /* The default relocation entry size is that of traditional V7 Unix. */ 522 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 523 524 /* The default symbol entry size is that of traditional Unix. */ 525 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 526 527#ifdef USE_MMAP 528 bfd_init_window (&obj_aout_sym_window (abfd)); 529 bfd_init_window (&obj_aout_string_window (abfd)); 530#endif 531 obj_aout_external_syms (abfd) = NULL; 532 obj_aout_external_strings (abfd) = NULL; 533 obj_aout_sym_hashes (abfd) = NULL; 534 535 if (! NAME(aout,make_sections) (abfd)) 536 return NULL; 537 538 obj_datasec (abfd)->_raw_size = execp->a_data; 539 obj_bsssec (abfd)->_raw_size = execp->a_bss; 540 541 obj_textsec (abfd)->flags = 542 (execp->a_trsize != 0 543 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 544 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 545 obj_datasec (abfd)->flags = 546 (execp->a_drsize != 0 547 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 548 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 549 obj_bsssec (abfd)->flags = SEC_ALLOC; 550 551#ifdef THIS_IS_ONLY_DOCUMENTATION 552 /* The common code can't fill in these things because they depend 553 on either the start address of the text segment, the rounding 554 up of virtual addresses between segments, or the starting file 555 position of the text segment -- all of which varies among different 556 versions of a.out. */ 557 558 /* Call back to the format-dependent code to fill in the rest of the 559 fields and do any further cleanup. Things that should be filled 560 in by the callback: */ 561 562 struct exec *execp = exec_hdr (abfd); 563 564 obj_textsec (abfd)->size = N_TXTSIZE (*execp); 565 obj_textsec (abfd)->raw_size = N_TXTSIZE (*execp); 566 /* data and bss are already filled in since they're so standard */ 567 568 /* The virtual memory addresses of the sections */ 569 obj_textsec (abfd)->vma = N_TXTADDR (*execp); 570 obj_datasec (abfd)->vma = N_DATADDR (*execp); 571 obj_bsssec (abfd)->vma = N_BSSADDR (*execp); 572 573 /* The file offsets of the sections */ 574 obj_textsec (abfd)->filepos = N_TXTOFF (*execp); 575 obj_datasec (abfd)->filepos = N_DATOFF (*execp); 576 577 /* The file offsets of the relocation info */ 578 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp); 579 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp); 580 581 /* The file offsets of the string table and symbol table. */ 582 obj_str_filepos (abfd) = N_STROFF (*execp); 583 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 584 585 /* Determine the architecture and machine type of the object file. */ 586 switch (N_MACHTYPE (*exec_hdr (abfd))) 587 { 588 default: 589 abfd->obj_arch = bfd_arch_obscure; 590 break; 591 } 592 593 adata (abfd)->page_size = TARGET_PAGE_SIZE; 594 adata (abfd)->segment_size = SEGMENT_SIZE; 595 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 596 597 return abfd->xvec; 598 599 /* The architecture is encoded in various ways in various a.out variants, 600 or is not encoded at all in some of them. The relocation size depends 601 on the architecture and the a.out variant. Finally, the return value 602 is the bfd_target vector in use. If an error occurs, return zero and 603 set bfd_error to the appropriate error code. 604 605 Formats such as b.out, which have additional fields in the a.out 606 header, should cope with them in this callback as well. */ 607#endif /* DOCUMENTATION */ 608 609 result = (*callback_to_real_object_p) (abfd); 610 611 /* Now that the segment addresses have been worked out, take a better 612 guess at whether the file is executable. If the entry point 613 is within the text segment, assume it is. (This makes files 614 executable even if their entry point address is 0, as long as 615 their text starts at zero.). 616 617 This test had to be changed to deal with systems where the text segment 618 runs at a different location than the default. The problem is that the 619 entry address can appear to be outside the text segment, thus causing an 620 erroneous conclusion that the file isn't executable. 621 622 To fix this, we now accept any non-zero entry point as an indication of 623 executability. This will work most of the time, since only the linker 624 sets the entry point, and that is likely to be non-zero for most systems. */ 625 626 if (execp->a_entry != 0 627 || (execp->a_entry >= obj_textsec (abfd)->vma 628 && execp->a_entry < (obj_textsec (abfd)->vma 629 + obj_textsec (abfd)->_raw_size))) 630 abfd->flags |= EXEC_P; 631#ifdef STAT_FOR_EXEC 632 else 633 { 634 struct stat stat_buf; 635 636 /* The original heuristic doesn't work in some important cases. 637 The a.out file has no information about the text start 638 address. For files (like kernels) linked to non-standard 639 addresses (ld -Ttext nnn) the entry point may not be between 640 the default text start (obj_textsec(abfd)->vma) and 641 (obj_textsec(abfd)->vma) + text size. This is not just a mach 642 issue. Many kernels are loaded at non standard addresses. */ 643 if (abfd->iostream != NULL 644 && (abfd->flags & BFD_IN_MEMORY) == 0 645 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0) 646 && ((stat_buf.st_mode & 0111) != 0)) 647 abfd->flags |= EXEC_P; 648 } 649#endif /* STAT_FOR_EXEC */ 650 651 if (result) 652 { 653#if 0 /* These should be set correctly anyways. */ 654 abfd->sections = obj_textsec (abfd); 655 obj_textsec (abfd)->next = obj_datasec (abfd); 656 obj_datasec (abfd)->next = obj_bsssec (abfd); 657#endif 658 } 659 else 660 { 661 free (rawptr); 662 abfd->tdata.aout_data = oldrawptr; 663 } 664 return result; 665} 666 667/* 668FUNCTION 669 aout_@var{size}_mkobject 670 671SYNOPSIS 672 boolean aout_@var{size}_mkobject, (bfd *abfd); 673 674DESCRIPTION 675 Initialize BFD @var{abfd} for use with a.out files. 676*/ 677 678boolean 679NAME(aout,mkobject) (abfd) 680 bfd *abfd; 681{ 682 struct aout_data_struct *rawptr; 683 bfd_size_type amt = sizeof (struct aout_data_struct); 684 685 bfd_set_error (bfd_error_system_call); 686 687 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); 688 if (rawptr == NULL) 689 return false; 690 691 abfd->tdata.aout_data = rawptr; 692 exec_hdr (abfd) = &(rawptr->e); 693 694 obj_textsec (abfd) = (asection *) NULL; 695 obj_datasec (abfd) = (asection *) NULL; 696 obj_bsssec (abfd) = (asection *) NULL; 697 698 return true; 699} 700 701/* 702FUNCTION 703 aout_@var{size}_machine_type 704 705SYNOPSIS 706 enum machine_type aout_@var{size}_machine_type 707 (enum bfd_architecture arch, 708 unsigned long machine)); 709 710DESCRIPTION 711 Keep track of machine architecture and machine type for 712 a.out's. Return the <<machine_type>> for a particular 713 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 714 and machine can't be represented in a.out format. 715 716 If the architecture is understood, machine type 0 (default) 717 is always understood. 718*/ 719 720enum machine_type 721NAME(aout,machine_type) (arch, machine, unknown) 722 enum bfd_architecture arch; 723 unsigned long machine; 724 boolean *unknown; 725{ 726 enum machine_type arch_flags; 727 728 arch_flags = M_UNKNOWN; 729 *unknown = true; 730 731 switch (arch) 732 { 733 case bfd_arch_sparc: 734 if (machine == 0 735 || machine == bfd_mach_sparc 736 || machine == bfd_mach_sparc_sparclite 737 || machine == bfd_mach_sparc_sparclite_le 738 || machine == bfd_mach_sparc_v9) 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 arch_flags = M_386; 758 break; 759 760 case bfd_arch_a29k: 761 if (machine == 0) 762 arch_flags = M_29K; 763 break; 764 765 case bfd_arch_arm: 766 if (machine == 0) 767 arch_flags = M_ARM; 768 break; 769 770 case bfd_arch_mips: 771 switch (machine) 772 { 773 case 0: 774 case bfd_mach_mips3000: 775 case bfd_mach_mips3900: 776 arch_flags = M_MIPS1; 777 break; 778 case bfd_mach_mips6000: 779 arch_flags = M_MIPS2; 780 break; 781 case bfd_mach_mips4000: 782 case bfd_mach_mips4010: 783 case bfd_mach_mips4100: 784 case bfd_mach_mips4300: 785 case bfd_mach_mips4400: 786 case bfd_mach_mips4600: 787 case bfd_mach_mips4650: 788 case bfd_mach_mips8000: 789 case bfd_mach_mips10000: 790 case bfd_mach_mips12000: 791 case bfd_mach_mips16: 792 case bfd_mach_mipsisa32: 793 case bfd_mach_mips5: 794 case bfd_mach_mipsisa64: 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 default: 825 arch_flags = M_UNKNOWN; 826 } 827 828 if (arch_flags != M_UNKNOWN) 829 *unknown = false; 830 831 return arch_flags; 832} 833 834/* 835FUNCTION 836 aout_@var{size}_set_arch_mach 837 838SYNOPSIS 839 boolean aout_@var{size}_set_arch_mach, 840 (bfd *, 841 enum bfd_architecture arch, 842 unsigned long machine)); 843 844DESCRIPTION 845 Set the architecture and the machine of the BFD @var{abfd} to the 846 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 847 can support the architecture required. 848*/ 849 850boolean 851NAME(aout,set_arch_mach) (abfd, arch, machine) 852 bfd *abfd; 853 enum bfd_architecture arch; 854 unsigned long machine; 855{ 856 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 857 return false; 858 859 if (arch != bfd_arch_unknown) 860 { 861 boolean unknown; 862 863 NAME(aout,machine_type) (arch, machine, &unknown); 864 if (unknown) 865 return false; 866 } 867 868 /* Determine the size of a relocation entry */ 869 switch (arch) 870 { 871 case bfd_arch_sparc: 872 case bfd_arch_a29k: 873 case bfd_arch_mips: 874 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 875 break; 876 default: 877 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 878 break; 879 } 880 881 return (*aout_backend_info (abfd)->set_sizes) (abfd); 882} 883 884static void 885adjust_o_magic (abfd, execp) 886 bfd *abfd; 887 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)->_raw_size; 901 vma += obj_textsec (abfd)->_raw_size; 902 903 /* Data. */ 904 if (!obj_datasec (abfd)->user_set_vma) 905 { 906#if 0 /* ?? Does alignment in the file image really matter? */ 907 pad = align_power (vma, obj_datasec (abfd)->alignment_power) - vma; 908#endif 909 obj_textsec (abfd)->_raw_size += pad; 910 pos += pad; 911 vma += pad; 912 obj_datasec (abfd)->vma = vma; 913 } 914 else 915 vma = obj_datasec (abfd)->vma; 916 obj_datasec (abfd)->filepos = pos; 917 pos += obj_datasec (abfd)->_raw_size; 918 vma += obj_datasec (abfd)->_raw_size; 919 920 /* BSS. */ 921 if (!obj_bsssec (abfd)->user_set_vma) 922 { 923#if 0 924 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 925#endif 926 obj_datasec (abfd)->_raw_size += pad; 927 pos += pad; 928 vma += pad; 929 obj_bsssec (abfd)->vma = vma; 930 } 931 else 932 { 933 /* The VMA of the .bss section is set by the VMA of the 934 .data section plus the size of the .data section. We may 935 need to add padding bytes to make this true. */ 936 pad = obj_bsssec (abfd)->vma - vma; 937 if (pad > 0) 938 { 939 obj_datasec (abfd)->_raw_size += pad; 940 pos += pad; 941 } 942 } 943 obj_bsssec (abfd)->filepos = pos; 944 945 /* Fix up the exec header. */ 946 execp->a_text = obj_textsec (abfd)->_raw_size; 947 execp->a_data = obj_datasec (abfd)->_raw_size; 948 execp->a_bss = obj_bsssec (abfd)->_raw_size; 949 N_SET_MAGIC (*execp, OMAGIC); 950} 951 952static void 953adjust_z_magic (abfd, execp) 954 bfd *abfd; 955 struct internal_exec *execp; 956{ 957 bfd_size_type data_pad, text_pad; 958 file_ptr text_end; 959 const struct aout_backend_data *abdp; 960 int ztih; /* Nonzero if text includes exec header. */ 961 962 abdp = aout_backend_info (abfd); 963 964 /* Text. */ 965 ztih = (abdp != NULL 966 && (abdp->text_includes_header 967 || obj_aout_subformat (abfd) == q_magic_format)); 968 obj_textsec (abfd)->filepos = (ztih 969 ? adata (abfd).exec_bytes_size 970 : adata (abfd).zmagic_disk_block_size); 971 if (! obj_textsec (abfd)->user_set_vma) 972 { 973 /* ?? Do we really need to check for relocs here? */ 974 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC) 975 ? 0 976 : (ztih 977 ? (abdp->default_text_vma 978 + adata (abfd).exec_bytes_size) 979 : abdp->default_text_vma)); 980 text_pad = 0; 981 } 982 else 983 { 984 /* The .text section is being loaded at an unusual address. We 985 may need to pad it such that the .data section starts at a page 986 boundary. */ 987 if (ztih) 988 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 989 & (adata (abfd).page_size - 1)); 990 else 991 text_pad = ((- obj_textsec (abfd)->vma) 992 & (adata (abfd).page_size - 1)); 993 } 994 995 /* Find start of data. */ 996 if (ztih) 997 { 998 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size; 999 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1000 } 1001 else 1002 { 1003 /* Note that if page_size == zmagic_disk_block_size, then 1004 filepos == page_size, and this case is the same as the ztih 1005 case. */ 1006 text_end = obj_textsec (abfd)->_raw_size; 1007 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 1008 text_end += obj_textsec (abfd)->filepos; 1009 } 1010 obj_textsec (abfd)->_raw_size += text_pad; 1011 text_end += text_pad; 1012 1013 /* Data. */ 1014 if (!obj_datasec (abfd)->user_set_vma) 1015 { 1016 bfd_vma vma; 1017 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->_raw_size; 1018 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1019 } 1020 if (abdp && abdp->zmagic_mapped_contiguous) 1021 { 1022 asection * text = obj_textsec (abfd); 1023 asection * data = obj_datasec (abfd); 1024 1025 text_pad = data->vma - (text->vma + text->_raw_size); 1026 /* Only pad the text section if the data 1027 section is going to be placed after it. */ 1028 if (text_pad > 0) 1029 text->_raw_size += text_pad; 1030 } 1031 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos 1032 + obj_textsec (abfd)->_raw_size); 1033 1034 /* Fix up exec header while we're at it. */ 1035 execp->a_text = obj_textsec (abfd)->_raw_size; 1036 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1037 execp->a_text += adata (abfd).exec_bytes_size; 1038 if (obj_aout_subformat (abfd) == q_magic_format) 1039 N_SET_MAGIC (*execp, QMAGIC); 1040 else 1041 N_SET_MAGIC (*execp, ZMAGIC); 1042 1043 /* Spec says data section should be rounded up to page boundary. */ 1044 obj_datasec (abfd)->_raw_size 1045 = align_power (obj_datasec (abfd)->_raw_size, 1046 obj_bsssec (abfd)->alignment_power); 1047 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->_raw_size, 1048 adata (abfd).page_size); 1049 data_pad = execp->a_data - obj_datasec (abfd)->_raw_size; 1050 1051 /* BSS. */ 1052 if (!obj_bsssec (abfd)->user_set_vma) 1053 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma 1054 + obj_datasec (abfd)->_raw_size); 1055 /* If the BSS immediately follows the data section and extra space 1056 in the page is left after the data section, fudge data 1057 in the header so that the bss section looks smaller by that 1058 amount. We'll start the bss section there, and lie to the OS. 1059 (Note that a linker script, as well as the above assignment, 1060 could have explicitly set the BSS vma to immediately follow 1061 the data section.) */ 1062 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power) 1063 == obj_datasec (abfd)->vma + obj_datasec (abfd)->_raw_size) 1064 execp->a_bss = (data_pad > obj_bsssec (abfd)->_raw_size 1065 ? 0 : obj_bsssec (abfd)->_raw_size - data_pad); 1066 else 1067 execp->a_bss = obj_bsssec (abfd)->_raw_size; 1068} 1069 1070static void 1071adjust_n_magic (abfd, execp) 1072 bfd *abfd; 1073 struct internal_exec *execp; 1074{ 1075 file_ptr pos = adata (abfd).exec_bytes_size; 1076 bfd_vma vma = 0; 1077 int pad; 1078 1079 /* Text. */ 1080 obj_textsec (abfd)->filepos = pos; 1081 if (!obj_textsec (abfd)->user_set_vma) 1082 obj_textsec (abfd)->vma = vma; 1083 else 1084 vma = obj_textsec (abfd)->vma; 1085 pos += obj_textsec (abfd)->_raw_size; 1086 vma += obj_textsec (abfd)->_raw_size; 1087 1088 /* Data. */ 1089 obj_datasec (abfd)->filepos = pos; 1090 if (!obj_datasec (abfd)->user_set_vma) 1091 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size); 1092 vma = obj_datasec (abfd)->vma; 1093 1094 /* Since BSS follows data immediately, see if it needs alignment. */ 1095 vma += obj_datasec (abfd)->_raw_size; 1096 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma; 1097 obj_datasec (abfd)->_raw_size += pad; 1098 pos += obj_datasec (abfd)->_raw_size; 1099 1100 /* BSS. */ 1101 if (!obj_bsssec (abfd)->user_set_vma) 1102 obj_bsssec (abfd)->vma = vma; 1103 else 1104 vma = obj_bsssec (abfd)->vma; 1105 1106 /* Fix up exec header. */ 1107 execp->a_text = obj_textsec (abfd)->_raw_size; 1108 execp->a_data = obj_datasec (abfd)->_raw_size; 1109 execp->a_bss = obj_bsssec (abfd)->_raw_size; 1110 N_SET_MAGIC (*execp, NMAGIC); 1111} 1112 1113boolean 1114NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end) 1115 bfd *abfd; 1116 bfd_size_type *text_size; 1117 file_ptr *text_end ATTRIBUTE_UNUSED; 1118{ 1119 struct internal_exec *execp = exec_hdr (abfd); 1120 1121 if (! NAME(aout,make_sections) (abfd)) 1122 return false; 1123 1124 if (adata (abfd).magic != undecided_magic) 1125 return true; 1126 1127 obj_textsec (abfd)->_raw_size = 1128 align_power (obj_textsec (abfd)->_raw_size, 1129 obj_textsec (abfd)->alignment_power); 1130 1131 *text_size = obj_textsec (abfd)->_raw_size; 1132 /* Rule (heuristic) for when to pad to a new page. Note that there 1133 are (at least) two ways demand-paged (ZMAGIC) files have been 1134 handled. Most Berkeley-based systems start the text segment at 1135 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1136 segment right after the exec header; the latter is counted in the 1137 text segment size, and is paged in by the kernel with the rest of 1138 the text. */ 1139 1140 /* This perhaps isn't the right way to do this, but made it simpler for me 1141 to understand enough to implement it. Better would probably be to go 1142 right from BFD flags to alignment/positioning characteristics. But the 1143 old code was sloppy enough about handling the flags, and had enough 1144 other magic, that it was a little hard for me to understand. I think 1145 I understand it better now, but I haven't time to do the cleanup this 1146 minute. */ 1147 1148 if (abfd->flags & D_PAGED) 1149 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1150 adata (abfd).magic = z_magic; 1151 else if (abfd->flags & WP_TEXT) 1152 adata (abfd).magic = n_magic; 1153 else 1154 adata (abfd).magic = o_magic; 1155 1156#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1157#if __GNUC__ >= 2 1158 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1159 ({ char *str; 1160 switch (adata (abfd).magic) 1161 { 1162 case n_magic: str = "NMAGIC"; break; 1163 case o_magic: str = "OMAGIC"; break; 1164 case z_magic: str = "ZMAGIC"; break; 1165 default: abort (); 1166 } 1167 str; 1168 }), 1169 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size, 1170 obj_textsec (abfd)->alignment_power, 1171 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size, 1172 obj_datasec (abfd)->alignment_power, 1173 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size, 1174 obj_bsssec (abfd)->alignment_power); 1175#endif 1176#endif 1177 1178 switch (adata (abfd).magic) 1179 { 1180 case o_magic: 1181 adjust_o_magic (abfd, execp); 1182 break; 1183 case z_magic: 1184 adjust_z_magic (abfd, execp); 1185 break; 1186 case n_magic: 1187 adjust_n_magic (abfd, execp); 1188 break; 1189 default: 1190 abort (); 1191 } 1192 1193#ifdef BFD_AOUT_DEBUG 1194 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1195 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size, 1196 obj_textsec (abfd)->filepos, 1197 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size, 1198 obj_datasec (abfd)->filepos, 1199 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size); 1200#endif 1201 1202 return true; 1203} 1204 1205/* 1206FUNCTION 1207 aout_@var{size}_new_section_hook 1208 1209SYNOPSIS 1210 boolean aout_@var{size}_new_section_hook, 1211 (bfd *abfd, 1212 asection *newsect)); 1213 1214DESCRIPTION 1215 Called by the BFD in response to a @code{bfd_make_section} 1216 request. 1217*/ 1218boolean 1219NAME(aout,new_section_hook) (abfd, newsect) 1220 bfd *abfd; 1221 asection *newsect; 1222{ 1223 /* align to double at least */ 1224 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power; 1225 1226 if (bfd_get_format (abfd) == bfd_object) 1227 { 1228 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text")) 1229 { 1230 obj_textsec (abfd)= newsect; 1231 newsect->target_index = N_TEXT; 1232 return true; 1233 } 1234 1235 if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data")) 1236 { 1237 obj_datasec (abfd) = newsect; 1238 newsect->target_index = N_DATA; 1239 return true; 1240 } 1241 1242 if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss")) 1243 { 1244 obj_bsssec (abfd) = newsect; 1245 newsect->target_index = N_BSS; 1246 return true; 1247 } 1248 1249 } 1250 1251 /* We allow more than three sections internally */ 1252 return true; 1253} 1254 1255boolean 1256NAME(aout,set_section_contents) (abfd, section, location, offset, count) 1257 bfd *abfd; 1258 sec_ptr section; 1259 PTR location; 1260 file_ptr offset; 1261 bfd_size_type count; 1262{ 1263 file_ptr text_end; 1264 bfd_size_type text_size; 1265 1266 if (! abfd->output_has_begun) 1267 { 1268 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 1269 return false; 1270 } 1271 1272 if (section == obj_bsssec (abfd)) 1273 { 1274 bfd_set_error (bfd_error_no_contents); 1275 return false; 1276 } 1277 1278 if (section != obj_textsec (abfd) 1279 && section != obj_datasec (abfd)) 1280 { 1281 (*_bfd_error_handler) 1282 (_("%s: can not represent section `%s' in a.out object file format"), 1283 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1284 bfd_set_error (bfd_error_nonrepresentable_section); 1285 return false; 1286 } 1287 1288 if (count != 0) 1289 { 1290 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1291 || bfd_bwrite (location, count, abfd) != count) 1292 return false; 1293 } 1294 1295 return true; 1296} 1297 1298/* Read the external symbols from an a.out file. */ 1299 1300static boolean 1301aout_get_external_symbols (abfd) 1302 bfd *abfd; 1303{ 1304 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL) 1305 { 1306 bfd_size_type count; 1307 struct external_nlist *syms; 1308 bfd_size_type amt; 1309 1310 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; 1311 1312#ifdef USE_MMAP 1313 if (bfd_get_file_window (abfd, 1314 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms, 1315 &obj_aout_sym_window (abfd), true) == false) 1316 return false; 1317 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1318#else 1319 /* We allocate using malloc to make the values easy to free 1320 later on. If we put them on the objalloc it might not be 1321 possible to free them. */ 1322 syms = ((struct external_nlist *) 1323 bfd_malloc (count * EXTERNAL_NLIST_SIZE)); 1324 if (syms == (struct external_nlist *) NULL && count != 0) 1325 return false; 1326 1327 amt = exec_hdr (abfd)->a_syms; 1328 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1329 || bfd_bread (syms, amt, abfd) != amt) 1330 { 1331 free (syms); 1332 return false; 1333 } 1334#endif 1335 1336 obj_aout_external_syms (abfd) = syms; 1337 obj_aout_external_sym_count (abfd) = count; 1338 } 1339 1340 if (obj_aout_external_strings (abfd) == NULL 1341 && exec_hdr (abfd)->a_syms != 0) 1342 { 1343 unsigned char string_chars[BYTES_IN_WORD]; 1344 bfd_size_type stringsize; 1345 char *strings; 1346 bfd_size_type amt = BYTES_IN_WORD; 1347 1348 /* Get the size of the strings. */ 1349 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1350 || bfd_bread ((PTR) string_chars, amt, abfd) != amt) 1351 return false; 1352 stringsize = GET_WORD (abfd, string_chars); 1353 1354#ifdef USE_MMAP 1355 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1356 &obj_aout_string_window (abfd), true) == false) 1357 return false; 1358 strings = (char *) obj_aout_string_window (abfd).data; 1359#else 1360 strings = (char *) bfd_malloc (stringsize + 1); 1361 if (strings == NULL) 1362 return false; 1363 1364 /* Skip space for the string count in the buffer for convenience 1365 when using indexes. */ 1366 amt = stringsize - BYTES_IN_WORD; 1367 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt) 1368 { 1369 free (strings); 1370 return false; 1371 } 1372#endif 1373 1374 /* Ensure that a zero index yields an empty string. */ 1375 strings[0] = '\0'; 1376 1377 strings[stringsize - 1] = 0; 1378 1379 obj_aout_external_strings (abfd) = strings; 1380 obj_aout_external_string_size (abfd) = stringsize; 1381 } 1382 1383 return true; 1384} 1385 1386/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1387 and symbol->value fields of CACHE_PTR will be set from the a.out 1388 nlist structure. This function is responsible for setting 1389 symbol->flags and symbol->section, and adjusting symbol->value. */ 1390 1391static boolean 1392translate_from_native_sym_flags (abfd, cache_ptr) 1393 bfd *abfd; 1394 aout_symbol_type *cache_ptr; 1395{ 1396 flagword visible; 1397 1398 if ((cache_ptr->type & N_STAB) != 0 1399 || cache_ptr->type == N_FN) 1400 { 1401 asection *sec; 1402 1403 /* This is a debugging symbol. */ 1404 1405 cache_ptr->symbol.flags = BSF_DEBUGGING; 1406 1407 /* Work out the symbol section. */ 1408 switch (cache_ptr->type & N_TYPE) 1409 { 1410 case N_TEXT: 1411 case N_FN: 1412 sec = obj_textsec (abfd); 1413 break; 1414 case N_DATA: 1415 sec = obj_datasec (abfd); 1416 break; 1417 case N_BSS: 1418 sec = obj_bsssec (abfd); 1419 break; 1420 default: 1421 case N_ABS: 1422 sec = bfd_abs_section_ptr; 1423 break; 1424 } 1425 1426 cache_ptr->symbol.section = sec; 1427 cache_ptr->symbol.value -= sec->vma; 1428 1429 return true; 1430 } 1431 1432 /* Get the default visibility. This does not apply to all types, so 1433 we just hold it in a local variable to use if wanted. */ 1434 if ((cache_ptr->type & N_EXT) == 0) 1435 visible = BSF_LOCAL; 1436 else 1437 visible = BSF_GLOBAL; 1438 1439 switch (cache_ptr->type) 1440 { 1441 default: 1442 case N_ABS: case N_ABS | N_EXT: 1443 cache_ptr->symbol.section = bfd_abs_section_ptr; 1444 cache_ptr->symbol.flags = visible; 1445 break; 1446 1447 case N_UNDF | N_EXT: 1448 if (cache_ptr->symbol.value != 0) 1449 { 1450 /* This is a common symbol. */ 1451 cache_ptr->symbol.flags = BSF_GLOBAL; 1452 cache_ptr->symbol.section = bfd_com_section_ptr; 1453 } 1454 else 1455 { 1456 cache_ptr->symbol.flags = 0; 1457 cache_ptr->symbol.section = bfd_und_section_ptr; 1458 } 1459 break; 1460 1461 case N_TEXT: case N_TEXT | N_EXT: 1462 cache_ptr->symbol.section = obj_textsec (abfd); 1463 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1464 cache_ptr->symbol.flags = visible; 1465 break; 1466 1467 /* N_SETV symbols used to represent set vectors placed in the 1468 data section. They are no longer generated. Theoretically, 1469 it was possible to extract the entries and combine them with 1470 new ones, although I don't know if that was ever actually 1471 done. Unless that feature is restored, treat them as data 1472 symbols. */ 1473 case N_SETV: case N_SETV | N_EXT: 1474 case N_DATA: case N_DATA | N_EXT: 1475 cache_ptr->symbol.section = obj_datasec (abfd); 1476 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1477 cache_ptr->symbol.flags = visible; 1478 break; 1479 1480 case N_BSS: case N_BSS | N_EXT: 1481 cache_ptr->symbol.section = obj_bsssec (abfd); 1482 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1483 cache_ptr->symbol.flags = visible; 1484 break; 1485 1486 case N_SETA: case N_SETA | N_EXT: 1487 case N_SETT: case N_SETT | N_EXT: 1488 case N_SETD: case N_SETD | N_EXT: 1489 case N_SETB: case N_SETB | N_EXT: 1490 { 1491 /* This code is no longer needed. It used to be used to make 1492 the linker handle set symbols, but they are now handled in 1493 the add_symbols routine instead. */ 1494#if 0 1495 asection *section; 1496 arelent_chain *reloc; 1497 asection *into_section; 1498 bfd_size_type amt; 1499 1500 /* This is a set symbol. The name of the symbol is the name 1501 of the set (e.g., __CTOR_LIST__). The value of the symbol 1502 is the value to add to the set. We create a section with 1503 the same name as the symbol, and add a reloc to insert the 1504 appropriate value into the section. 1505 1506 This action is actually obsolete; it used to make the 1507 linker do the right thing, but the linker no longer uses 1508 this function. */ 1509 1510 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name); 1511 if (section == NULL) 1512 { 1513 char *copy; 1514 1515 amt = strlen (cache_ptr->symbol.name) + 1; 1516 copy = bfd_alloc (abfd, amt); 1517 if (copy == NULL) 1518 return false; 1519 1520 strcpy (copy, cache_ptr->symbol.name); 1521 section = bfd_make_section (abfd, copy); 1522 if (section == NULL) 1523 return false; 1524 } 1525 1526 amt = sizeof (arelent_chain); 1527 reloc = (arelent_chain *) bfd_alloc (abfd, amt); 1528 if (reloc == NULL) 1529 return false; 1530 1531 /* Build a relocation entry for the constructor. */ 1532 switch (cache_ptr->type & N_TYPE) 1533 { 1534 case N_SETA: 1535 into_section = bfd_abs_section_ptr; 1536 cache_ptr->type = N_ABS; 1537 break; 1538 case N_SETT: 1539 into_section = obj_textsec (abfd); 1540 cache_ptr->type = N_TEXT; 1541 break; 1542 case N_SETD: 1543 into_section = obj_datasec (abfd); 1544 cache_ptr->type = N_DATA; 1545 break; 1546 case N_SETB: 1547 into_section = obj_bsssec (abfd); 1548 cache_ptr->type = N_BSS; 1549 break; 1550 } 1551 1552 /* Build a relocation pointing into the constructor section 1553 pointing at the symbol in the set vector specified. */ 1554 reloc->relent.addend = cache_ptr->symbol.value; 1555 cache_ptr->symbol.section = into_section; 1556 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr; 1557 1558 /* We modify the symbol to belong to a section depending upon 1559 the name of the symbol, and add to the size of the section 1560 to contain a pointer to the symbol. Build a reloc entry to 1561 relocate to this symbol attached to this section. */ 1562 section->flags = SEC_CONSTRUCTOR | SEC_RELOC; 1563 1564 section->reloc_count++; 1565 section->alignment_power = 2; 1566 1567 reloc->next = section->constructor_chain; 1568 section->constructor_chain = reloc; 1569 reloc->relent.address = section->_raw_size; 1570 section->_raw_size += BYTES_IN_WORD; 1571 1572 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO (abfd); 1573 1574#endif /* 0 */ 1575 1576 switch (cache_ptr->type & N_TYPE) 1577 { 1578 case N_SETA: 1579 cache_ptr->symbol.section = bfd_abs_section_ptr; 1580 break; 1581 case N_SETT: 1582 cache_ptr->symbol.section = obj_textsec (abfd); 1583 break; 1584 case N_SETD: 1585 cache_ptr->symbol.section = obj_datasec (abfd); 1586 break; 1587 case N_SETB: 1588 cache_ptr->symbol.section = obj_bsssec (abfd); 1589 break; 1590 } 1591 1592 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1593 } 1594 break; 1595 1596 case N_WARNING: 1597 /* This symbol is the text of a warning message. The next 1598 symbol is the symbol to associate the warning with. If a 1599 reference is made to that symbol, a warning is issued. */ 1600 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1601 cache_ptr->symbol.section = bfd_abs_section_ptr; 1602 break; 1603 1604 case N_INDR: case N_INDR | N_EXT: 1605 /* An indirect symbol. This consists of two symbols in a row. 1606 The first symbol is the name of the indirection. The second 1607 symbol is the name of the target. A reference to the first 1608 symbol becomes a reference to the second. */ 1609 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1610 cache_ptr->symbol.section = bfd_ind_section_ptr; 1611 break; 1612 1613 case N_WEAKU: 1614 cache_ptr->symbol.section = bfd_und_section_ptr; 1615 cache_ptr->symbol.flags = BSF_WEAK; 1616 break; 1617 1618 case N_WEAKA: 1619 cache_ptr->symbol.section = bfd_abs_section_ptr; 1620 cache_ptr->symbol.flags = BSF_WEAK; 1621 break; 1622 1623 case N_WEAKT: 1624 cache_ptr->symbol.section = obj_textsec (abfd); 1625 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1626 cache_ptr->symbol.flags = BSF_WEAK; 1627 break; 1628 1629 case N_WEAKD: 1630 cache_ptr->symbol.section = obj_datasec (abfd); 1631 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1632 cache_ptr->symbol.flags = BSF_WEAK; 1633 break; 1634 1635 case N_WEAKB: 1636 cache_ptr->symbol.section = obj_bsssec (abfd); 1637 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1638 cache_ptr->symbol.flags = BSF_WEAK; 1639 break; 1640 } 1641 1642 return true; 1643} 1644 1645/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1646 1647static boolean 1648translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer) 1649 bfd *abfd; 1650 asymbol *cache_ptr; 1651 struct external_nlist *sym_pointer; 1652{ 1653 bfd_vma value = cache_ptr->value; 1654 asection *sec; 1655 bfd_vma off; 1656 1657 /* Mask out any existing type bits in case copying from one section 1658 to another. */ 1659 sym_pointer->e_type[0] &= ~N_TYPE; 1660 1661 sec = bfd_get_section (cache_ptr); 1662 off = 0; 1663 1664 if (sec == NULL) 1665 { 1666 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1667 file. */ 1668 (*_bfd_error_handler) 1669 (_("%s: can not represent section for symbol `%s' in a.out object file format"), 1670 bfd_get_filename (abfd), 1671 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1672 bfd_set_error (bfd_error_nonrepresentable_section); 1673 return false; 1674 } 1675 1676 if (sec->output_section != NULL) 1677 { 1678 off = sec->output_offset; 1679 sec = sec->output_section; 1680 } 1681 1682 if (bfd_is_abs_section (sec)) 1683 sym_pointer->e_type[0] |= N_ABS; 1684 else if (sec == obj_textsec (abfd)) 1685 sym_pointer->e_type[0] |= N_TEXT; 1686 else if (sec == obj_datasec (abfd)) 1687 sym_pointer->e_type[0] |= N_DATA; 1688 else if (sec == obj_bsssec (abfd)) 1689 sym_pointer->e_type[0] |= N_BSS; 1690 else if (bfd_is_und_section (sec)) 1691 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1692 else if (bfd_is_ind_section (sec)) 1693 sym_pointer->e_type[0] = N_INDR; 1694 else if (bfd_is_com_section (sec)) 1695 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1696 else 1697 { 1698 (*_bfd_error_handler) 1699 (_("%s: can not represent section `%s' in a.out object file format"), 1700 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1701 bfd_set_error (bfd_error_nonrepresentable_section); 1702 return false; 1703 } 1704 1705 /* Turn the symbol from section relative to absolute again */ 1706 value += sec->vma + off; 1707 1708 if ((cache_ptr->flags & BSF_WARNING) != 0) 1709 sym_pointer->e_type[0] = N_WARNING; 1710 1711 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1712 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1713 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1714 sym_pointer->e_type[0] |= N_EXT; 1715 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1716 sym_pointer->e_type[0] &= ~N_EXT; 1717 1718 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1719 { 1720 int type = ((aout_symbol_type *) cache_ptr)->type; 1721 switch (type) 1722 { 1723 case N_ABS: type = N_SETA; break; 1724 case N_TEXT: type = N_SETT; break; 1725 case N_DATA: type = N_SETD; break; 1726 case N_BSS: type = N_SETB; break; 1727 } 1728 sym_pointer->e_type[0] = type; 1729 } 1730 1731 if ((cache_ptr->flags & BSF_WEAK) != 0) 1732 { 1733 int type; 1734 1735 switch (sym_pointer->e_type[0] & N_TYPE) 1736 { 1737 default: 1738 case N_ABS: type = N_WEAKA; break; 1739 case N_TEXT: type = N_WEAKT; break; 1740 case N_DATA: type = N_WEAKD; break; 1741 case N_BSS: type = N_WEAKB; break; 1742 case N_UNDF: type = N_WEAKU; break; 1743 } 1744 sym_pointer->e_type[0] = type; 1745 } 1746 1747 PUT_WORD (abfd, value, sym_pointer->e_value); 1748 1749 return true; 1750} 1751 1752/* Native-level interface to symbols. */ 1753 1754asymbol * 1755NAME(aout,make_empty_symbol) (abfd) 1756 bfd *abfd; 1757{ 1758 bfd_size_type amt = sizeof (aout_symbol_type); 1759 aout_symbol_type *new = (aout_symbol_type *) bfd_zalloc (abfd, amt); 1760 if (!new) 1761 return NULL; 1762 new->symbol.the_bfd = abfd; 1763 1764 return &new->symbol; 1765} 1766 1767/* Translate a set of internal symbols into external symbols. */ 1768 1769boolean 1770NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic) 1771 bfd *abfd; 1772 aout_symbol_type *in; 1773 struct external_nlist *ext; 1774 bfd_size_type count; 1775 char *str; 1776 bfd_size_type strsize; 1777 boolean dynamic; 1778{ 1779 struct external_nlist *ext_end; 1780 1781 ext_end = ext + count; 1782 for (; ext < ext_end; ext++, in++) 1783 { 1784 bfd_vma x; 1785 1786 x = GET_WORD (abfd, ext->e_strx); 1787 in->symbol.the_bfd = abfd; 1788 1789 /* For the normal symbols, the zero index points at the number 1790 of bytes in the string table but is to be interpreted as the 1791 null string. For the dynamic symbols, the number of bytes in 1792 the string table is stored in the __DYNAMIC structure and the 1793 zero index points at an actual string. */ 1794 if (x == 0 && ! dynamic) 1795 in->symbol.name = ""; 1796 else if (x < strsize) 1797 in->symbol.name = str + x; 1798 else 1799 return false; 1800 1801 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1802 in->desc = H_GET_16 (abfd, ext->e_desc); 1803 in->other = H_GET_8 (abfd, ext->e_other); 1804 in->type = H_GET_8 (abfd, ext->e_type); 1805 in->symbol.udata.p = NULL; 1806 1807 if (! translate_from_native_sym_flags (abfd, in)) 1808 return false; 1809 1810 if (dynamic) 1811 in->symbol.flags |= BSF_DYNAMIC; 1812 } 1813 1814 return true; 1815} 1816 1817/* We read the symbols into a buffer, which is discarded when this 1818 function exits. We read the strings into a buffer large enough to 1819 hold them all plus all the cached symbol entries. */ 1820 1821boolean 1822NAME(aout,slurp_symbol_table) (abfd) 1823 bfd *abfd; 1824{ 1825 struct external_nlist *old_external_syms; 1826 aout_symbol_type *cached; 1827 bfd_size_type cached_size; 1828 1829 /* If there's no work to be done, don't do any */ 1830 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) 1831 return true; 1832 1833 old_external_syms = obj_aout_external_syms (abfd); 1834 1835 if (! aout_get_external_symbols (abfd)) 1836 return false; 1837 1838 cached_size = obj_aout_external_sym_count (abfd); 1839 cached_size *= sizeof (aout_symbol_type); 1840 cached = (aout_symbol_type *) bfd_malloc (cached_size); 1841 if (cached == NULL && cached_size != 0) 1842 return false; 1843 if (cached_size != 0) 1844 memset (cached, 0, (size_t) cached_size); 1845 1846 /* Convert from external symbol information to internal. */ 1847 if (! (NAME(aout,translate_symbol_table) 1848 (abfd, cached, 1849 obj_aout_external_syms (abfd), 1850 obj_aout_external_sym_count (abfd), 1851 obj_aout_external_strings (abfd), 1852 obj_aout_external_string_size (abfd), 1853 false))) 1854 { 1855 free (cached); 1856 return false; 1857 } 1858 1859 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1860 1861 obj_aout_symbols (abfd) = cached; 1862 1863 /* It is very likely that anybody who calls this function will not 1864 want the external symbol information, so if it was allocated 1865 because of our call to aout_get_external_symbols, we free it up 1866 right away to save space. */ 1867 if (old_external_syms == (struct external_nlist *) NULL 1868 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) 1869 { 1870#ifdef USE_MMAP 1871 bfd_free_window (&obj_aout_sym_window (abfd)); 1872#else 1873 free (obj_aout_external_syms (abfd)); 1874#endif 1875 obj_aout_external_syms (abfd) = NULL; 1876 } 1877 1878 return true; 1879} 1880 1881/* We use a hash table when writing out symbols so that we only write 1882 out a particular string once. This helps particularly when the 1883 linker writes out stabs debugging entries, because each different 1884 contributing object file tends to have many duplicate stabs 1885 strings. 1886 1887 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1888 if BFD_TRADITIONAL_FORMAT is set. */ 1889 1890static bfd_size_type add_to_stringtab 1891 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean)); 1892static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *)); 1893 1894/* Get the index of a string in a strtab, adding it if it is not 1895 already present. */ 1896 1897static INLINE bfd_size_type 1898add_to_stringtab (abfd, tab, str, copy) 1899 bfd *abfd; 1900 struct bfd_strtab_hash *tab; 1901 const char *str; 1902 boolean copy; 1903{ 1904 boolean hash; 1905 bfd_size_type index; 1906 1907 /* An index of 0 always means the empty string. */ 1908 if (str == 0 || *str == '\0') 1909 return 0; 1910 1911 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1912 doesn't understand a hashed string table. */ 1913 hash = true; 1914 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1915 hash = false; 1916 1917 index = _bfd_stringtab_add (tab, str, hash, copy); 1918 1919 if (index != (bfd_size_type) -1) 1920 { 1921 /* Add BYTES_IN_WORD to the return value to account for the 1922 space taken up by the string table size. */ 1923 index += BYTES_IN_WORD; 1924 } 1925 1926 return index; 1927} 1928 1929/* Write out a strtab. ABFD is already at the right location in the 1930 file. */ 1931 1932static boolean 1933emit_stringtab (abfd, tab) 1934 register bfd *abfd; 1935 struct bfd_strtab_hash *tab; 1936{ 1937 bfd_byte buffer[BYTES_IN_WORD]; 1938 bfd_size_type amt = BYTES_IN_WORD; 1939 1940 /* The string table starts with the size. */ 1941 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1942 if (bfd_bwrite ((PTR) buffer, amt, abfd) != amt) 1943 return false; 1944 1945 return _bfd_stringtab_emit (abfd, tab); 1946} 1947 1948boolean 1949NAME(aout,write_syms) (abfd) 1950 bfd *abfd; 1951{ 1952 unsigned int count ; 1953 asymbol **generic = bfd_get_outsymbols (abfd); 1954 struct bfd_strtab_hash *strtab; 1955 1956 strtab = _bfd_stringtab_init (); 1957 if (strtab == NULL) 1958 return false; 1959 1960 for (count = 0; count < bfd_get_symcount (abfd); count++) 1961 { 1962 asymbol *g = generic[count]; 1963 bfd_size_type indx; 1964 struct external_nlist nsp; 1965 bfd_size_type amt; 1966 1967 indx = add_to_stringtab (abfd, strtab, g->name, false); 1968 if (indx == (bfd_size_type) -1) 1969 goto error_return; 1970 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1971 1972 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour) 1973 { 1974 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc); 1975 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other); 1976 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type); 1977 } 1978 else 1979 { 1980 H_PUT_16 (abfd, 0, nsp.e_desc); 1981 H_PUT_8 (abfd, 0, nsp.e_other); 1982 H_PUT_8 (abfd, 0, nsp.e_type); 1983 } 1984 1985 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1986 goto error_return; 1987 1988 amt = EXTERNAL_NLIST_SIZE; 1989 if (bfd_bwrite ((PTR) &nsp, amt, abfd) != amt) 1990 goto error_return; 1991 1992 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1993 here, at the end. */ 1994 g->KEEPIT = count; 1995 } 1996 1997 if (! emit_stringtab (abfd, strtab)) 1998 goto error_return; 1999 2000 _bfd_stringtab_free (strtab); 2001 2002 return true; 2003 2004error_return: 2005 _bfd_stringtab_free (strtab); 2006 return false; 2007} 2008 2009long 2010NAME(aout,get_symtab) (abfd, location) 2011 bfd *abfd; 2012 asymbol **location; 2013{ 2014 unsigned int counter = 0; 2015 aout_symbol_type *symbase; 2016 2017 if (!NAME(aout,slurp_symbol_table) (abfd)) 2018 return -1; 2019 2020 for (symbase = obj_aout_symbols (abfd); 2021 counter++ < bfd_get_symcount (abfd); 2022 ) 2023 *(location++) = (asymbol *) (symbase++); 2024 *location++ =0; 2025 return bfd_get_symcount (abfd); 2026} 2027 2028/* Standard reloc stuff */ 2029/* Output standard relocation information to a file in target byte order. */ 2030 2031extern void NAME(aout,swap_std_reloc_out) 2032 PARAMS ((bfd *, arelent *, struct reloc_std_external *)); 2033 2034void 2035NAME(aout,swap_std_reloc_out) (abfd, g, natptr) 2036 bfd *abfd; 2037 arelent *g; 2038 struct reloc_std_external *natptr; 2039{ 2040 int r_index; 2041 asymbol *sym = *(g->sym_ptr_ptr); 2042 int r_extern; 2043 unsigned int r_length; 2044 int r_pcrel; 2045 int r_baserel, r_jmptable, r_relative; 2046 asection *output_section = sym->section->output_section; 2047 2048 PUT_WORD (abfd, g->address, natptr->r_address); 2049 2050 r_length = g->howto->size ; /* Size as a power of two */ 2051 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 2052 /* XXX This relies on relocs coming from a.out files. */ 2053 r_baserel = (g->howto->type & 8) != 0; 2054 r_jmptable = (g->howto->type & 16) != 0; 2055 r_relative = (g->howto->type & 32) != 0; 2056 2057#if 0 2058 /* For a standard reloc, the addend is in the object file. */ 2059 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; 2060#endif 2061 2062 /* name was clobbered by aout_write_syms to be symbol index */ 2063 2064 /* If this relocation is relative to a symbol then set the 2065 r_index to the symbols index, and the r_extern bit. 2066 2067 Absolute symbols can come in in two ways, either as an offset 2068 from the abs section, or as a symbol which has an abs value. 2069 check for that here 2070 */ 2071 2072 if (bfd_is_com_section (output_section) 2073 || bfd_is_abs_section (output_section) 2074 || bfd_is_und_section (output_section)) 2075 { 2076 if (bfd_abs_section_ptr->symbol == sym) 2077 { 2078 /* Whoops, looked like an abs symbol, but is really an offset 2079 from the abs section */ 2080 r_index = N_ABS; 2081 r_extern = 0; 2082 } 2083 else 2084 { 2085 /* Fill in symbol */ 2086 r_extern = 1; 2087 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2088 2089 } 2090 } 2091 else 2092 { 2093 /* Just an ordinary section */ 2094 r_extern = 0; 2095 r_index = output_section->target_index; 2096 } 2097 2098 /* now the fun stuff */ 2099 if (bfd_header_big_endian (abfd)) 2100 { 2101 natptr->r_index[0] = r_index >> 16; 2102 natptr->r_index[1] = r_index >> 8; 2103 natptr->r_index[2] = r_index; 2104 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 2105 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 2106 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 2107 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 2108 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 2109 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 2110 } 2111 else 2112 { 2113 natptr->r_index[2] = r_index >> 16; 2114 natptr->r_index[1] = r_index >> 8; 2115 natptr->r_index[0] = r_index; 2116 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 2117 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 2118 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 2119 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 2120 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 2121 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2122 } 2123} 2124 2125/* Extended stuff */ 2126/* Output extended relocation information to a file in target byte order. */ 2127 2128extern void NAME(aout,swap_ext_reloc_out) 2129 PARAMS ((bfd *, arelent *, struct reloc_ext_external *)); 2130 2131void 2132NAME(aout,swap_ext_reloc_out) (abfd, g, natptr) 2133 bfd *abfd; 2134 arelent *g; 2135 register struct reloc_ext_external *natptr; 2136{ 2137 int r_index; 2138 int r_extern; 2139 unsigned int r_type; 2140 bfd_vma r_addend; 2141 asymbol *sym = *(g->sym_ptr_ptr); 2142 asection *output_section = sym->section->output_section; 2143 2144 PUT_WORD (abfd, g->address, natptr->r_address); 2145 2146 r_type = (unsigned int) g->howto->type; 2147 2148 r_addend = g->addend; 2149 if ((sym->flags & BSF_SECTION_SYM) != 0) 2150 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2151 2152 /* If this relocation is relative to a symbol then set the 2153 r_index to the symbols index, and the r_extern bit. 2154 2155 Absolute symbols can come in in two ways, either as an offset 2156 from the abs section, or as a symbol which has an abs value. 2157 check for that here. */ 2158 2159 if (bfd_is_abs_section (bfd_get_section (sym))) 2160 { 2161 r_extern = 0; 2162 r_index = N_ABS; 2163 } 2164 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2165 { 2166 if (bfd_is_und_section (bfd_get_section (sym)) 2167 || (sym->flags & BSF_GLOBAL) != 0) 2168 r_extern = 1; 2169 else 2170 r_extern = 0; 2171 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2172 } 2173 else 2174 { 2175 /* Just an ordinary section */ 2176 r_extern = 0; 2177 r_index = output_section->target_index; 2178 } 2179 2180 /* now the fun stuff */ 2181 if (bfd_header_big_endian (abfd)) 2182 { 2183 natptr->r_index[0] = r_index >> 16; 2184 natptr->r_index[1] = r_index >> 8; 2185 natptr->r_index[2] = r_index; 2186 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 2187 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2188 } 2189 else 2190 { 2191 natptr->r_index[2] = r_index >> 16; 2192 natptr->r_index[1] = r_index >> 8; 2193 natptr->r_index[0] = r_index; 2194 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 2195 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2196 } 2197 2198 PUT_WORD (abfd, r_addend, natptr->r_addend); 2199} 2200 2201/* BFD deals internally with all things based from the section they're 2202 in. so, something in 10 bytes into a text section with a base of 2203 50 would have a symbol (.text+10) and know .text vma was 50. 2204 2205 Aout keeps all it's symbols based from zero, so the symbol would 2206 contain 60. This macro subs the base of each section from the value 2207 to give the true offset from the section. */ 2208 2209#define MOVE_ADDRESS(ad) \ 2210 if (r_extern) \ 2211 { \ 2212 /* Undefined symbol. */ \ 2213 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2214 cache_ptr->addend = ad; \ 2215 } \ 2216 else \ 2217 { \ 2218 /* Defined, section relative. Replace symbol with pointer to \ 2219 symbol which points to section. */ \ 2220 switch (r_index) \ 2221 { \ 2222 case N_TEXT: \ 2223 case N_TEXT | N_EXT: \ 2224 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ 2225 cache_ptr->addend = ad - su->textsec->vma; \ 2226 break; \ 2227 case N_DATA: \ 2228 case N_DATA | N_EXT: \ 2229 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ 2230 cache_ptr->addend = ad - su->datasec->vma; \ 2231 break; \ 2232 case N_BSS: \ 2233 case N_BSS | N_EXT: \ 2234 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ 2235 cache_ptr->addend = ad - su->bsssec->vma; \ 2236 break; \ 2237 default: \ 2238 case N_ABS: \ 2239 case N_ABS | N_EXT: \ 2240 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2241 cache_ptr->addend = ad; \ 2242 break; \ 2243 } \ 2244 } 2245 2246void 2247NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) 2248 bfd *abfd; 2249 struct reloc_ext_external *bytes; 2250 arelent *cache_ptr; 2251 asymbol **symbols; 2252 bfd_size_type symcount; 2253{ 2254 unsigned int r_index; 2255 int r_extern; 2256 unsigned int r_type; 2257 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2258 2259 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2260 2261 /* now the fun stuff */ 2262 if (bfd_header_big_endian (abfd)) 2263 { 2264 r_index = ((bytes->r_index[0] << 16) 2265 | (bytes->r_index[1] << 8) 2266 | bytes->r_index[2]); 2267 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2268 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2269 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2270 } 2271 else 2272 { 2273 r_index = ((bytes->r_index[2] << 16) 2274 | (bytes->r_index[1] << 8) 2275 | bytes->r_index[0]); 2276 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2277 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2278 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2279 } 2280 2281 cache_ptr->howto = howto_table_ext + r_type; 2282 2283 /* Base relative relocs are always against the symbol table, 2284 regardless of the setting of r_extern. r_extern just reflects 2285 whether the symbol the reloc is against is local or global. */ 2286 if (r_type == RELOC_BASE10 2287 || r_type == RELOC_BASE13 2288 || r_type == RELOC_BASE22) 2289 r_extern = 1; 2290 2291 if (r_extern && r_index > symcount) 2292 { 2293 /* We could arrange to return an error, but it might be useful 2294 to see the file even if it is bad. */ 2295 r_extern = 0; 2296 r_index = N_ABS; 2297 } 2298 2299 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); 2300} 2301 2302void 2303NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) 2304 bfd *abfd; 2305 struct reloc_std_external *bytes; 2306 arelent *cache_ptr; 2307 asymbol **symbols; 2308 bfd_size_type symcount; 2309{ 2310 unsigned int r_index; 2311 int r_extern; 2312 unsigned int r_length; 2313 int r_pcrel; 2314 int r_baserel, r_jmptable, r_relative; 2315 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2316 unsigned int howto_idx; 2317 2318 cache_ptr->address = H_GET_32 (abfd, bytes->r_address); 2319 2320 /* now the fun stuff */ 2321 if (bfd_header_big_endian (abfd)) 2322 { 2323 r_index = ((bytes->r_index[0] << 16) 2324 | (bytes->r_index[1] << 8) 2325 | bytes->r_index[2]); 2326 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2327 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2328 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2329 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2330 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2331 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2332 >> RELOC_STD_BITS_LENGTH_SH_BIG); 2333 } 2334 else 2335 { 2336 r_index = ((bytes->r_index[2] << 16) 2337 | (bytes->r_index[1] << 8) 2338 | bytes->r_index[0]); 2339 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2340 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2341 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2342 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2343 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2344 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2345 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 2346 } 2347 2348 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 2349 + 16 * r_jmptable + 32 * r_relative); 2350 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 2351 cache_ptr->howto = howto_table_std + howto_idx; 2352 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); 2353 2354 /* Base relative relocs are always against the symbol table, 2355 regardless of the setting of r_extern. r_extern just reflects 2356 whether the symbol the reloc is against is local or global. */ 2357 if (r_baserel) 2358 r_extern = 1; 2359 2360 if (r_extern && r_index > symcount) 2361 { 2362 /* We could arrange to return an error, but it might be useful 2363 to see the file even if it is bad. */ 2364 r_extern = 0; 2365 r_index = N_ABS; 2366 } 2367 2368 MOVE_ADDRESS (0); 2369} 2370 2371/* Read and swap the relocs for a section. */ 2372 2373boolean 2374NAME(aout,slurp_reloc_table) (abfd, asect, symbols) 2375 bfd *abfd; 2376 sec_ptr asect; 2377 asymbol **symbols; 2378{ 2379 bfd_size_type count; 2380 bfd_size_type reloc_size; 2381 PTR relocs; 2382 arelent *reloc_cache; 2383 size_t each_size; 2384 unsigned int counter = 0; 2385 arelent *cache_ptr; 2386 bfd_size_type amt; 2387 2388 if (asect->relocation) 2389 return true; 2390 2391 if (asect->flags & SEC_CONSTRUCTOR) 2392 return true; 2393 2394 if (asect == obj_datasec (abfd)) 2395 reloc_size = exec_hdr (abfd)->a_drsize; 2396 else if (asect == obj_textsec (abfd)) 2397 reloc_size = exec_hdr (abfd)->a_trsize; 2398 else if (asect == obj_bsssec (abfd)) 2399 reloc_size = 0; 2400 else 2401 { 2402 bfd_set_error (bfd_error_invalid_operation); 2403 return false; 2404 } 2405 2406 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2407 return false; 2408 2409 each_size = obj_reloc_entry_size (abfd); 2410 2411 count = reloc_size / each_size; 2412 2413 amt = count * sizeof (arelent); 2414 reloc_cache = (arelent *) bfd_malloc (amt); 2415 if (reloc_cache == NULL && count != 0) 2416 return false; 2417 memset (reloc_cache, 0, (size_t) amt); 2418 2419 relocs = bfd_malloc (reloc_size); 2420 if (relocs == NULL && reloc_size != 0) 2421 { 2422 free (reloc_cache); 2423 return false; 2424 } 2425 2426 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) 2427 { 2428 free (relocs); 2429 free (reloc_cache); 2430 return false; 2431 } 2432 2433 cache_ptr = reloc_cache; 2434 if (each_size == RELOC_EXT_SIZE) 2435 { 2436 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; 2437 2438 for (; counter < count; counter++, rptr++, cache_ptr++) 2439 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2440 (bfd_size_type) bfd_get_symcount (abfd)); 2441 } 2442 else 2443 { 2444 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs; 2445 2446 for (; counter < count; counter++, rptr++, cache_ptr++) 2447 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2448 (bfd_size_type) bfd_get_symcount (abfd)); 2449 } 2450 2451 free (relocs); 2452 2453 asect->relocation = reloc_cache; 2454 asect->reloc_count = cache_ptr - reloc_cache; 2455 2456 return true; 2457} 2458 2459/* Write out a relocation section into an object file. */ 2460 2461boolean 2462NAME(aout,squirt_out_relocs) (abfd, section) 2463 bfd *abfd; 2464 asection *section; 2465{ 2466 arelent **generic; 2467 unsigned char *native, *natptr; 2468 size_t each_size; 2469 2470 unsigned int count = section->reloc_count; 2471 bfd_size_type natsize; 2472 2473 if (count == 0 || section->orelocation == NULL) 2474 return true; 2475 2476 each_size = obj_reloc_entry_size (abfd); 2477 natsize = (bfd_size_type) each_size * count; 2478 native = (unsigned char *) bfd_zalloc (abfd, natsize); 2479 if (!native) 2480 return false; 2481 2482 generic = section->orelocation; 2483 2484 if (each_size == RELOC_EXT_SIZE) 2485 { 2486 for (natptr = native; 2487 count != 0; 2488 --count, natptr += each_size, ++generic) 2489 MY_swap_ext_reloc_out (abfd, *generic, 2490 (struct reloc_ext_external *) natptr); 2491 } 2492 else 2493 { 2494 for (natptr = native; 2495 count != 0; 2496 --count, natptr += each_size, ++generic) 2497 MY_swap_std_reloc_out (abfd, *generic, 2498 (struct reloc_std_external *) natptr); 2499 } 2500 2501 if (bfd_bwrite ((PTR) native, natsize, abfd) != natsize) 2502 { 2503 bfd_release (abfd, native); 2504 return false; 2505 } 2506 bfd_release (abfd, native); 2507 2508 return true; 2509} 2510 2511/* This is stupid. This function should be a boolean predicate */ 2512long 2513NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols) 2514 bfd *abfd; 2515 sec_ptr section; 2516 arelent **relptr; 2517 asymbol **symbols; 2518{ 2519 arelent *tblptr = section->relocation; 2520 unsigned int count; 2521 2522 if (section == obj_bsssec (abfd)) 2523 { 2524 *relptr = NULL; 2525 return 0; 2526 } 2527 2528 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols))) 2529 return -1; 2530 2531 if (section->flags & SEC_CONSTRUCTOR) 2532 { 2533 arelent_chain *chain = section->constructor_chain; 2534 for (count = 0; count < section->reloc_count; count ++) 2535 { 2536 *relptr ++ = &chain->relent; 2537 chain = chain->next; 2538 } 2539 } 2540 else 2541 { 2542 tblptr = section->relocation; 2543 2544 for (count = 0; count++ < section->reloc_count; ) 2545 { 2546 *relptr++ = tblptr++; 2547 } 2548 } 2549 *relptr = 0; 2550 2551 return section->reloc_count; 2552} 2553 2554long 2555NAME(aout,get_reloc_upper_bound) (abfd, asect) 2556 bfd *abfd; 2557 sec_ptr asect; 2558{ 2559 if (bfd_get_format (abfd) != bfd_object) 2560 { 2561 bfd_set_error (bfd_error_invalid_operation); 2562 return -1; 2563 } 2564 if (asect->flags & SEC_CONSTRUCTOR) 2565 { 2566 return (sizeof (arelent *) * (asect->reloc_count+1)); 2567 } 2568 2569 if (asect == obj_datasec (abfd)) 2570 return (sizeof (arelent *) 2571 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2572 + 1)); 2573 2574 if (asect == obj_textsec (abfd)) 2575 return (sizeof (arelent *) 2576 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2577 + 1)); 2578 2579 if (asect == obj_bsssec (abfd)) 2580 return sizeof (arelent *); 2581 2582 if (asect == obj_bsssec (abfd)) 2583 return 0; 2584 2585 bfd_set_error (bfd_error_invalid_operation); 2586 return -1; 2587} 2588 2589long 2590NAME(aout,get_symtab_upper_bound) (abfd) 2591 bfd *abfd; 2592{ 2593 if (!NAME(aout,slurp_symbol_table) (abfd)) 2594 return -1; 2595 2596 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2597} 2598 2599alent * 2600NAME(aout,get_lineno) (ignore_abfd, ignore_symbol) 2601 bfd *ignore_abfd ATTRIBUTE_UNUSED; 2602 asymbol *ignore_symbol ATTRIBUTE_UNUSED; 2603{ 2604 return (alent *)NULL; 2605} 2606 2607void 2608NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret) 2609 bfd *ignore_abfd ATTRIBUTE_UNUSED; 2610 asymbol *symbol; 2611 symbol_info *ret; 2612{ 2613 bfd_symbol_info (symbol, ret); 2614 2615 if (ret->type == '?') 2616 { 2617 int type_code = aout_symbol (symbol)->type & 0xff; 2618 const char *stab_name = bfd_get_stab_name (type_code); 2619 static char buf[10]; 2620 2621 if (stab_name == NULL) 2622 { 2623 sprintf (buf, "(%d)", type_code); 2624 stab_name = buf; 2625 } 2626 ret->type = '-'; 2627 ret->stab_type = type_code; 2628 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff); 2629 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff); 2630 ret->stab_name = stab_name; 2631 } 2632} 2633 2634void 2635NAME(aout,print_symbol) (abfd, afile, symbol, how) 2636 bfd *abfd; 2637 PTR afile; 2638 asymbol *symbol; 2639 bfd_print_symbol_type how; 2640{ 2641 FILE *file = (FILE *)afile; 2642 2643 switch (how) 2644 { 2645 case bfd_print_symbol_name: 2646 if (symbol->name) 2647 fprintf (file,"%s", symbol->name); 2648 break; 2649 case bfd_print_symbol_more: 2650 fprintf (file,"%4x %2x %2x", 2651 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2652 (unsigned) (aout_symbol (symbol)->other & 0xff), 2653 (unsigned) (aout_symbol (symbol)->type)); 2654 break; 2655 case bfd_print_symbol_all: 2656 { 2657 const char *section_name = symbol->section->name; 2658 2659 bfd_print_symbol_vandf (abfd, (PTR)file, symbol); 2660 2661 fprintf (file," %-5s %04x %02x %02x", 2662 section_name, 2663 (unsigned) (aout_symbol (symbol)->desc & 0xffff), 2664 (unsigned) (aout_symbol (symbol)->other & 0xff), 2665 (unsigned) (aout_symbol (symbol)->type & 0xff)); 2666 if (symbol->name) 2667 fprintf (file," %s", symbol->name); 2668 } 2669 break; 2670 } 2671} 2672 2673/* If we don't have to allocate more than 1MB to hold the generic 2674 symbols, we use the generic minisymbol methord: it's faster, since 2675 it only translates the symbols once, not multiple times. */ 2676#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2677 2678/* Read minisymbols. For minisymbols, we use the unmodified a.out 2679 symbols. The minisymbol_to_symbol function translates these into 2680 BFD asymbol structures. */ 2681 2682long 2683NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep) 2684 bfd *abfd; 2685 boolean dynamic; 2686 PTR *minisymsp; 2687 unsigned int *sizep; 2688{ 2689 if (dynamic) 2690 { 2691 /* We could handle the dynamic symbols here as well, but it's 2692 easier to hand them off. */ 2693 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2694 } 2695 2696 if (! aout_get_external_symbols (abfd)) 2697 return -1; 2698 2699 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2700 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2701 2702 *minisymsp = (PTR) obj_aout_external_syms (abfd); 2703 2704 /* By passing the external symbols back from this routine, we are 2705 giving up control over the memory block. Clear 2706 obj_aout_external_syms, so that we do not try to free it 2707 ourselves. */ 2708 obj_aout_external_syms (abfd) = NULL; 2709 2710 *sizep = EXTERNAL_NLIST_SIZE; 2711 return obj_aout_external_sym_count (abfd); 2712} 2713 2714/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2715 unmodified a.out symbol. The SYM argument is a structure returned 2716 by bfd_make_empty_symbol, which we fill in here. */ 2717 2718asymbol * 2719NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym) 2720 bfd *abfd; 2721 boolean dynamic; 2722 const PTR minisym; 2723 asymbol *sym; 2724{ 2725 if (dynamic 2726 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2727 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2728 2729 memset (sym, 0, sizeof (aout_symbol_type)); 2730 2731 /* We call translate_symbol_table to translate a single symbol. */ 2732 if (! (NAME(aout,translate_symbol_table) 2733 (abfd, 2734 (aout_symbol_type *) sym, 2735 (struct external_nlist *) minisym, 2736 (bfd_size_type) 1, 2737 obj_aout_external_strings (abfd), 2738 obj_aout_external_string_size (abfd), 2739 false))) 2740 return NULL; 2741 2742 return sym; 2743} 2744 2745/* 2746 provided a BFD, a section and an offset into the section, calculate 2747 and return the name of the source file and the line nearest to the 2748 wanted location. 2749*/ 2750 2751boolean 2752NAME(aout,find_nearest_line) 2753 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) 2754 bfd *abfd; 2755 asection *section; 2756 asymbol **symbols; 2757 bfd_vma offset; 2758 const char **filename_ptr; 2759 const char **functionname_ptr; 2760 unsigned int *line_ptr; 2761{ 2762 /* Run down the file looking for the filename, function and linenumber */ 2763 asymbol **p; 2764 const char *directory_name = NULL; 2765 const char *main_file_name = NULL; 2766 const char *current_file_name = NULL; 2767 const char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2768 const char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2769 bfd_vma low_line_vma = 0; 2770 bfd_vma low_func_vma = 0; 2771 asymbol *func = 0; 2772 bfd_size_type filelen, funclen; 2773 char *buf; 2774 2775 *filename_ptr = abfd->filename; 2776 *functionname_ptr = 0; 2777 *line_ptr = 0; 2778 if (symbols != (asymbol **)NULL) 2779 { 2780 for (p = symbols; *p; p++) 2781 { 2782 aout_symbol_type *q = (aout_symbol_type *) (*p); 2783 next: 2784 switch (q->type) 2785 { 2786 case N_TEXT: 2787 /* If this looks like a file name symbol, and it comes after 2788 the line number we have found so far, but before the 2789 offset, then we have probably not found the right line 2790 number. */ 2791 if (q->symbol.value <= offset 2792 && ((q->symbol.value > low_line_vma 2793 && (line_file_name != NULL 2794 || *line_ptr != 0)) 2795 || (q->symbol.value > low_func_vma 2796 && func != NULL))) 2797 { 2798 const char *symname; 2799 2800 symname = q->symbol.name; 2801 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2802 { 2803 if (q->symbol.value > low_line_vma) 2804 { 2805 *line_ptr = 0; 2806 line_file_name = NULL; 2807 } 2808 if (q->symbol.value > low_func_vma) 2809 func = NULL; 2810 } 2811 } 2812 break; 2813 2814 case N_SO: 2815 /* If this symbol is less than the offset, but greater than 2816 the line number we have found so far, then we have not 2817 found the right line number. */ 2818 if (q->symbol.value <= offset) 2819 { 2820 if (q->symbol.value > low_line_vma) 2821 { 2822 *line_ptr = 0; 2823 line_file_name = NULL; 2824 } 2825 if (q->symbol.value > low_func_vma) 2826 func = NULL; 2827 } 2828 2829 main_file_name = current_file_name = q->symbol.name; 2830 /* Look ahead to next symbol to check if that too is an N_SO. */ 2831 p++; 2832 if (*p == NULL) 2833 break; 2834 q = (aout_symbol_type *) (*p); 2835 if (q->type != (int)N_SO) 2836 goto next; 2837 2838 /* Found a second N_SO First is directory; second is filename. */ 2839 directory_name = current_file_name; 2840 main_file_name = current_file_name = q->symbol.name; 2841 if (obj_textsec (abfd) != section) 2842 goto done; 2843 break; 2844 case N_SOL: 2845 current_file_name = q->symbol.name; 2846 break; 2847 2848 case N_SLINE: 2849 2850 case N_DSLINE: 2851 case N_BSLINE: 2852 /* We'll keep this if it resolves nearer than the one we have 2853 already. */ 2854 if (q->symbol.value >= low_line_vma 2855 && q->symbol.value <= offset) 2856 { 2857 *line_ptr = q->desc; 2858 low_line_vma = q->symbol.value; 2859 line_file_name = current_file_name; 2860 line_directory_name = directory_name; 2861 } 2862 break; 2863 case N_FUN: 2864 { 2865 /* We'll keep this if it is nearer than the one we have already */ 2866 if (q->symbol.value >= low_func_vma && 2867 q->symbol.value <= offset) { 2868 low_func_vma = q->symbol.value; 2869 func = (asymbol *)q; 2870 } 2871 else if (q->symbol.value > offset) 2872 goto done; 2873 } 2874 break; 2875 } 2876 } 2877 } 2878 2879 done: 2880 if (*line_ptr != 0) 2881 { 2882 main_file_name = line_file_name; 2883 directory_name = line_directory_name; 2884 } 2885 2886 if (main_file_name == NULL 2887 || IS_ABSOLUTE_PATH (main_file_name) 2888 || directory_name == NULL) 2889 filelen = 0; 2890 else 2891 filelen = strlen (directory_name) + strlen (main_file_name); 2892 if (func == NULL) 2893 funclen = 0; 2894 else 2895 funclen = strlen (bfd_asymbol_name (func)); 2896 2897 if (adata (abfd).line_buf != NULL) 2898 free (adata (abfd).line_buf); 2899 if (filelen + funclen == 0) 2900 adata (abfd).line_buf = buf = NULL; 2901 else 2902 { 2903 buf = (char *) bfd_malloc (filelen + funclen + 3); 2904 adata (abfd).line_buf = buf; 2905 if (buf == NULL) 2906 return false; 2907 } 2908 2909 if (main_file_name != NULL) 2910 { 2911 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2912 *filename_ptr = main_file_name; 2913 else 2914 { 2915 sprintf (buf, "%s%s", directory_name, main_file_name); 2916 *filename_ptr = buf; 2917 buf += filelen + 1; 2918 } 2919 } 2920 2921 if (func) 2922 { 2923 const char *function = func->name; 2924 char *colon; 2925 2926 /* The caller expects a symbol name. We actually have a 2927 function name, without the leading underscore. Put the 2928 underscore back in, so that the caller gets a symbol name. */ 2929 if (bfd_get_symbol_leading_char (abfd) == '\0') 2930 strcpy (buf, function); 2931 else 2932 { 2933 buf[0] = bfd_get_symbol_leading_char (abfd); 2934 strcpy (buf + 1, function); 2935 } 2936 /* Have to remove : stuff */ 2937 colon = strchr (buf, ':'); 2938 if (colon != NULL) 2939 *colon = '\0'; 2940 *functionname_ptr = buf; 2941 } 2942 2943 return true; 2944} 2945 2946int 2947NAME(aout,sizeof_headers) (abfd, execable) 2948 bfd *abfd; 2949 boolean execable ATTRIBUTE_UNUSED; 2950{ 2951 return adata (abfd).exec_bytes_size; 2952} 2953 2954/* Free all information we have cached for this BFD. We can always 2955 read it again later if we need it. */ 2956 2957boolean 2958NAME(aout,bfd_free_cached_info) (abfd) 2959 bfd *abfd; 2960{ 2961 asection *o; 2962 2963 if (bfd_get_format (abfd) != bfd_object 2964 || abfd->tdata.aout_data == NULL) 2965 return true; 2966 2967#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2968 BFCI_FREE (obj_aout_symbols (abfd)); 2969#ifdef USE_MMAP 2970 obj_aout_external_syms (abfd) = 0; 2971 bfd_free_window (&obj_aout_sym_window (abfd)); 2972 bfd_free_window (&obj_aout_string_window (abfd)); 2973 obj_aout_external_strings (abfd) = 0; 2974#else 2975 BFCI_FREE (obj_aout_external_syms (abfd)); 2976 BFCI_FREE (obj_aout_external_strings (abfd)); 2977#endif 2978 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 2979 BFCI_FREE (o->relocation); 2980#undef BFCI_FREE 2981 2982 return true; 2983} 2984 2985/* a.out link code. */ 2986 2987static boolean aout_link_add_object_symbols 2988 PARAMS ((bfd *, struct bfd_link_info *)); 2989static boolean aout_link_check_archive_element 2990 PARAMS ((bfd *, struct bfd_link_info *, boolean *)); 2991static boolean aout_link_free_symbols PARAMS ((bfd *)); 2992static boolean aout_link_check_ar_symbols 2993 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded)); 2994static boolean aout_link_add_symbols 2995 PARAMS ((bfd *, struct bfd_link_info *)); 2996 2997/* Routine to create an entry in an a.out link hash table. */ 2998 2999struct bfd_hash_entry * 3000NAME(aout,link_hash_newfunc) (entry, table, string) 3001 struct bfd_hash_entry *entry; 3002 struct bfd_hash_table *table; 3003 const char *string; 3004{ 3005 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 3006 3007 /* Allocate the structure if it has not already been allocated by a 3008 subclass. */ 3009 if (ret == (struct aout_link_hash_entry *) NULL) 3010 ret = ((struct aout_link_hash_entry *) 3011 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry))); 3012 if (ret == (struct aout_link_hash_entry *) NULL) 3013 return (struct bfd_hash_entry *) ret; 3014 3015 /* Call the allocation method of the superclass. */ 3016 ret = ((struct aout_link_hash_entry *) 3017 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 3018 table, string)); 3019 if (ret) 3020 { 3021 /* Set local fields. */ 3022 ret->written = false; 3023 ret->indx = -1; 3024 } 3025 3026 return (struct bfd_hash_entry *) ret; 3027} 3028 3029/* Initialize an a.out link hash table. */ 3030 3031boolean 3032NAME(aout,link_hash_table_init) (table, abfd, newfunc) 3033 struct aout_link_hash_table *table; 3034 bfd *abfd; 3035 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, 3036 struct bfd_hash_table *, 3037 const char *)); 3038{ 3039 return _bfd_link_hash_table_init (&table->root, abfd, newfunc); 3040} 3041 3042/* Create an a.out link hash table. */ 3043 3044struct bfd_link_hash_table * 3045NAME(aout,link_hash_table_create) (abfd) 3046 bfd *abfd; 3047{ 3048 struct aout_link_hash_table *ret; 3049 bfd_size_type amt = sizeof (struct aout_link_hash_table); 3050 3051 ret = (struct aout_link_hash_table *) bfd_alloc (abfd, amt); 3052 if (ret == NULL) 3053 return (struct bfd_link_hash_table *) NULL; 3054 if (! NAME(aout,link_hash_table_init) (ret, abfd, 3055 NAME(aout,link_hash_newfunc))) 3056 { 3057 free (ret); 3058 return (struct bfd_link_hash_table *) NULL; 3059 } 3060 return &ret->root; 3061} 3062 3063/* Given an a.out BFD, add symbols to the global hash table as 3064 appropriate. */ 3065 3066boolean 3067NAME(aout,link_add_symbols) (abfd, info) 3068 bfd *abfd; 3069 struct bfd_link_info *info; 3070{ 3071 switch (bfd_get_format (abfd)) 3072 { 3073 case bfd_object: 3074 return aout_link_add_object_symbols (abfd, info); 3075 case bfd_archive: 3076 return _bfd_generic_link_add_archive_symbols 3077 (abfd, info, aout_link_check_archive_element); 3078 default: 3079 bfd_set_error (bfd_error_wrong_format); 3080 return false; 3081 } 3082} 3083 3084/* Add symbols from an a.out object file. */ 3085 3086static boolean 3087aout_link_add_object_symbols (abfd, info) 3088 bfd *abfd; 3089 struct bfd_link_info *info; 3090{ 3091 if (! aout_get_external_symbols (abfd)) 3092 return false; 3093 if (! aout_link_add_symbols (abfd, info)) 3094 return false; 3095 if (! info->keep_memory) 3096 { 3097 if (! aout_link_free_symbols (abfd)) 3098 return false; 3099 } 3100 return true; 3101} 3102 3103/* Check a single archive element to see if we need to include it in 3104 the link. *PNEEDED is set according to whether this element is 3105 needed in the link or not. This is called from 3106 _bfd_generic_link_add_archive_symbols. */ 3107 3108static boolean 3109aout_link_check_archive_element (abfd, info, pneeded) 3110 bfd *abfd; 3111 struct bfd_link_info *info; 3112 boolean *pneeded; 3113{ 3114 if (! aout_get_external_symbols (abfd)) 3115 return false; 3116 3117 if (! aout_link_check_ar_symbols (abfd, info, pneeded)) 3118 return false; 3119 3120 if (*pneeded) 3121 { 3122 if (! aout_link_add_symbols (abfd, info)) 3123 return false; 3124 } 3125 3126 if (! info->keep_memory || ! *pneeded) 3127 { 3128 if (! aout_link_free_symbols (abfd)) 3129 return false; 3130 } 3131 3132 return true; 3133} 3134 3135/* Free up the internal symbols read from an a.out file. */ 3136 3137static boolean 3138aout_link_free_symbols (abfd) 3139 bfd *abfd; 3140{ 3141 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) 3142 { 3143#ifdef USE_MMAP 3144 bfd_free_window (&obj_aout_sym_window (abfd)); 3145#else 3146 free ((PTR) obj_aout_external_syms (abfd)); 3147#endif 3148 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL; 3149 } 3150 if (obj_aout_external_strings (abfd) != (char *) NULL) 3151 { 3152#ifdef USE_MMAP 3153 bfd_free_window (&obj_aout_string_window (abfd)); 3154#else 3155 free ((PTR) obj_aout_external_strings (abfd)); 3156#endif 3157 obj_aout_external_strings (abfd) = (char *) NULL; 3158 } 3159 return true; 3160} 3161 3162/* Look through the internal symbols to see if this object file should 3163 be included in the link. We should include this object file if it 3164 defines any symbols which are currently undefined. If this object 3165 file defines a common symbol, then we may adjust the size of the 3166 known symbol but we do not include the object file in the link 3167 (unless there is some other reason to include it). */ 3168 3169static boolean 3170aout_link_check_ar_symbols (abfd, info, pneeded) 3171 bfd *abfd; 3172 struct bfd_link_info *info; 3173 boolean *pneeded; 3174{ 3175 register struct external_nlist *p; 3176 struct external_nlist *pend; 3177 char *strings; 3178 3179 *pneeded = false; 3180 3181 /* Look through all the symbols. */ 3182 p = obj_aout_external_syms (abfd); 3183 pend = p + obj_aout_external_sym_count (abfd); 3184 strings = obj_aout_external_strings (abfd); 3185 for (; p < pend; p++) 3186 { 3187 int type = H_GET_8 (abfd, p->e_type); 3188 const char *name; 3189 struct bfd_link_hash_entry *h; 3190 3191 /* Ignore symbols that are not externally visible. This is an 3192 optimization only, as we check the type more thoroughly 3193 below. */ 3194 if (((type & N_EXT) == 0 3195 || (type & N_STAB) != 0 3196 || type == N_FN) 3197 && type != N_WEAKA 3198 && type != N_WEAKT 3199 && type != N_WEAKD 3200 && type != N_WEAKB) 3201 { 3202 if (type == N_WARNING 3203 || type == N_INDR) 3204 ++p; 3205 continue; 3206 } 3207 3208 name = strings + GET_WORD (abfd, p->e_strx); 3209 h = bfd_link_hash_lookup (info->hash, name, false, false, true); 3210 3211 /* We are only interested in symbols that are currently 3212 undefined or common. */ 3213 if (h == (struct bfd_link_hash_entry *) NULL 3214 || (h->type != bfd_link_hash_undefined 3215 && h->type != bfd_link_hash_common)) 3216 { 3217 if (type == (N_INDR | N_EXT)) 3218 ++p; 3219 continue; 3220 } 3221 3222 if (type == (N_TEXT | N_EXT) 3223 || type == (N_DATA | N_EXT) 3224 || type == (N_BSS | N_EXT) 3225 || type == (N_ABS | N_EXT) 3226 || type == (N_INDR | N_EXT)) 3227 { 3228 /* This object file defines this symbol. We must link it 3229 in. This is true regardless of whether the current 3230 definition of the symbol is undefined or common. If the 3231 current definition is common, we have a case in which we 3232 have already seen an object file including 3233 int a; 3234 and this object file from the archive includes 3235 int a = 5; 3236 In such a case we must include this object file. 3237 3238 FIXME: The SunOS 4.1.3 linker will pull in the archive 3239 element if the symbol is defined in the .data section, 3240 but not if it is defined in the .text section. That 3241 seems a bit crazy to me, and I haven't implemented it. 3242 However, it might be correct. */ 3243 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3244 return false; 3245 *pneeded = true; 3246 return true; 3247 } 3248 3249 if (type == (N_UNDF | N_EXT)) 3250 { 3251 bfd_vma value; 3252 3253 value = GET_WORD (abfd, p->e_value); 3254 if (value != 0) 3255 { 3256 /* This symbol is common in the object from the archive 3257 file. */ 3258 if (h->type == bfd_link_hash_undefined) 3259 { 3260 bfd *symbfd; 3261 unsigned int power; 3262 3263 symbfd = h->u.undef.abfd; 3264 if (symbfd == (bfd *) NULL) 3265 { 3266 /* This symbol was created as undefined from 3267 outside BFD. We assume that we should link 3268 in the object file. This is done for the -u 3269 option in the linker. */ 3270 if (! (*info->callbacks->add_archive_element) (info, 3271 abfd, 3272 name)) 3273 return false; 3274 *pneeded = true; 3275 return true; 3276 } 3277 /* Turn the current link symbol into a common 3278 symbol. It is already on the undefs list. */ 3279 h->type = bfd_link_hash_common; 3280 h->u.c.p = ((struct bfd_link_hash_common_entry *) 3281 bfd_hash_allocate (&info->hash->table, 3282 sizeof (struct bfd_link_hash_common_entry))); 3283 if (h->u.c.p == NULL) 3284 return false; 3285 3286 h->u.c.size = value; 3287 3288 /* FIXME: This isn't quite right. The maximum 3289 alignment of a common symbol should be set by the 3290 architecture of the output file, not of the input 3291 file. */ 3292 power = bfd_log2 (value); 3293 if (power > bfd_get_arch_info (abfd)->section_align_power) 3294 power = bfd_get_arch_info (abfd)->section_align_power; 3295 h->u.c.p->alignment_power = power; 3296 3297 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3298 "COMMON"); 3299 } 3300 else 3301 { 3302 /* Adjust the size of the common symbol if 3303 necessary. */ 3304 if (value > h->u.c.size) 3305 h->u.c.size = value; 3306 } 3307 } 3308 } 3309 3310 if (type == N_WEAKA 3311 || type == N_WEAKT 3312 || type == N_WEAKD 3313 || type == N_WEAKB) 3314 { 3315 /* This symbol is weak but defined. We must pull it in if 3316 the current link symbol is undefined, but we don't want 3317 it if the current link symbol is common. */ 3318 if (h->type == bfd_link_hash_undefined) 3319 { 3320 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3321 return false; 3322 *pneeded = true; 3323 return true; 3324 } 3325 } 3326 } 3327 3328 /* We do not need this object file. */ 3329 return true; 3330} 3331 3332/* Add all symbols from an object file to the hash table. */ 3333 3334static boolean 3335aout_link_add_symbols (abfd, info) 3336 bfd *abfd; 3337 struct bfd_link_info *info; 3338{ 3339 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *, 3340 const char *, flagword, asection *, 3341 bfd_vma, const char *, boolean, 3342 boolean, 3343 struct bfd_link_hash_entry **)); 3344 struct external_nlist *syms; 3345 bfd_size_type sym_count; 3346 char *strings; 3347 boolean copy; 3348 struct aout_link_hash_entry **sym_hash; 3349 register struct external_nlist *p; 3350 struct external_nlist *pend; 3351 bfd_size_type amt; 3352 3353 syms = obj_aout_external_syms (abfd); 3354 sym_count = obj_aout_external_sym_count (abfd); 3355 strings = obj_aout_external_strings (abfd); 3356 if (info->keep_memory) 3357 copy = false; 3358 else 3359 copy = true; 3360 3361 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 3362 { 3363 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 3364 (abfd, info, &syms, &sym_count, &strings))) 3365 return false; 3366 } 3367 3368 /* We keep a list of the linker hash table entries that correspond 3369 to particular symbols. We could just look them up in the hash 3370 table, but keeping the list is more efficient. Perhaps this 3371 should be conditional on info->keep_memory. */ 3372 amt = sym_count * sizeof (struct aout_link_hash_entry *); 3373 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt); 3374 if (sym_hash == NULL && sym_count != 0) 3375 return false; 3376 obj_aout_sym_hashes (abfd) = sym_hash; 3377 3378 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 3379 if (add_one_symbol == NULL) 3380 add_one_symbol = _bfd_generic_link_add_one_symbol; 3381 3382 p = syms; 3383 pend = p + sym_count; 3384 for (; p < pend; p++, sym_hash++) 3385 { 3386 int type; 3387 const char *name; 3388 bfd_vma value; 3389 asection *section; 3390 flagword flags; 3391 const char *string; 3392 3393 *sym_hash = NULL; 3394 3395 type = H_GET_8 (abfd, p->e_type); 3396 3397 /* Ignore debugging symbols. */ 3398 if ((type & N_STAB) != 0) 3399 continue; 3400 3401 name = strings + GET_WORD (abfd, p->e_strx); 3402 value = GET_WORD (abfd, p->e_value); 3403 flags = BSF_GLOBAL; 3404 string = NULL; 3405 switch (type) 3406 { 3407 default: 3408 abort (); 3409 3410 case N_UNDF: 3411 case N_ABS: 3412 case N_TEXT: 3413 case N_DATA: 3414 case N_BSS: 3415 case N_FN_SEQ: 3416 case N_COMM: 3417 case N_SETV: 3418 case N_FN: 3419 /* Ignore symbols that are not externally visible. */ 3420 continue; 3421 case N_INDR: 3422 /* Ignore local indirect symbol. */ 3423 ++p; 3424 ++sym_hash; 3425 continue; 3426 3427 case N_UNDF | N_EXT: 3428 if (value == 0) 3429 { 3430 section = bfd_und_section_ptr; 3431 flags = 0; 3432 } 3433 else 3434 section = bfd_com_section_ptr; 3435 break; 3436 case N_ABS | N_EXT: 3437 section = bfd_abs_section_ptr; 3438 break; 3439 case N_TEXT | N_EXT: 3440 section = obj_textsec (abfd); 3441 value -= bfd_get_section_vma (abfd, section); 3442 break; 3443 case N_DATA | N_EXT: 3444 case N_SETV | N_EXT: 3445 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3446 translate_from_native_sym_flags. */ 3447 section = obj_datasec (abfd); 3448 value -= bfd_get_section_vma (abfd, section); 3449 break; 3450 case N_BSS | N_EXT: 3451 section = obj_bsssec (abfd); 3452 value -= bfd_get_section_vma (abfd, section); 3453 break; 3454 case N_INDR | N_EXT: 3455 /* An indirect symbol. The next symbol is the symbol 3456 which this one really is. */ 3457 BFD_ASSERT (p + 1 < pend); 3458 ++p; 3459 string = strings + GET_WORD (abfd, p->e_strx); 3460 section = bfd_ind_section_ptr; 3461 flags |= BSF_INDIRECT; 3462 break; 3463 case N_COMM | N_EXT: 3464 section = bfd_com_section_ptr; 3465 break; 3466 case N_SETA: case N_SETA | N_EXT: 3467 section = bfd_abs_section_ptr; 3468 flags |= BSF_CONSTRUCTOR; 3469 break; 3470 case N_SETT: case N_SETT | N_EXT: 3471 section = obj_textsec (abfd); 3472 flags |= BSF_CONSTRUCTOR; 3473 value -= bfd_get_section_vma (abfd, section); 3474 break; 3475 case N_SETD: case N_SETD | N_EXT: 3476 section = obj_datasec (abfd); 3477 flags |= BSF_CONSTRUCTOR; 3478 value -= bfd_get_section_vma (abfd, section); 3479 break; 3480 case N_SETB: case N_SETB | N_EXT: 3481 section = obj_bsssec (abfd); 3482 flags |= BSF_CONSTRUCTOR; 3483 value -= bfd_get_section_vma (abfd, section); 3484 break; 3485 case N_WARNING: 3486 /* A warning symbol. The next symbol is the one to warn 3487 about. */ 3488 BFD_ASSERT (p + 1 < pend); 3489 ++p; 3490 string = name; 3491 name = strings + GET_WORD (abfd, p->e_strx); 3492 section = bfd_und_section_ptr; 3493 flags |= BSF_WARNING; 3494 break; 3495 case N_WEAKU: 3496 section = bfd_und_section_ptr; 3497 flags = BSF_WEAK; 3498 break; 3499 case N_WEAKA: 3500 section = bfd_abs_section_ptr; 3501 flags = BSF_WEAK; 3502 break; 3503 case N_WEAKT: 3504 section = obj_textsec (abfd); 3505 value -= bfd_get_section_vma (abfd, section); 3506 flags = BSF_WEAK; 3507 break; 3508 case N_WEAKD: 3509 section = obj_datasec (abfd); 3510 value -= bfd_get_section_vma (abfd, section); 3511 flags = BSF_WEAK; 3512 break; 3513 case N_WEAKB: 3514 section = obj_bsssec (abfd); 3515 value -= bfd_get_section_vma (abfd, section); 3516 flags = BSF_WEAK; 3517 break; 3518 } 3519 3520 if (! ((*add_one_symbol) 3521 (info, abfd, name, flags, section, value, string, copy, false, 3522 (struct bfd_link_hash_entry **) sym_hash))) 3523 return false; 3524 3525 /* Restrict the maximum alignment of a common symbol based on 3526 the architecture, since a.out has no way to represent 3527 alignment requirements of a section in a .o file. FIXME: 3528 This isn't quite right: it should use the architecture of the 3529 output file, not the input files. */ 3530 if ((*sym_hash)->root.type == bfd_link_hash_common 3531 && ((*sym_hash)->root.u.c.p->alignment_power > 3532 bfd_get_arch_info (abfd)->section_align_power)) 3533 (*sym_hash)->root.u.c.p->alignment_power = 3534 bfd_get_arch_info (abfd)->section_align_power; 3535 3536 /* If this is a set symbol, and we are not building sets, then 3537 it is possible for the hash entry to not have been set. In 3538 such a case, treat the symbol as not globally defined. */ 3539 if ((*sym_hash)->root.type == bfd_link_hash_new) 3540 { 3541 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3542 *sym_hash = NULL; 3543 } 3544 3545 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3546 ++sym_hash; 3547 } 3548 3549 return true; 3550} 3551 3552/* A hash table used for header files with N_BINCL entries. */ 3553 3554struct aout_link_includes_table 3555{ 3556 struct bfd_hash_table root; 3557}; 3558 3559/* A linked list of totals that we have found for a particular header 3560 file. */ 3561 3562struct aout_link_includes_totals 3563{ 3564 struct aout_link_includes_totals *next; 3565 bfd_vma total; 3566}; 3567 3568/* An entry in the header file hash table. */ 3569 3570struct aout_link_includes_entry 3571{ 3572 struct bfd_hash_entry root; 3573 /* List of totals we have found for this file. */ 3574 struct aout_link_includes_totals *totals; 3575}; 3576 3577/* Look up an entry in an the header file hash table. */ 3578 3579#define aout_link_includes_lookup(table, string, create, copy) \ 3580 ((struct aout_link_includes_entry *) \ 3581 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3582 3583/* During the final link step we need to pass around a bunch of 3584 information, so we do it in an instance of this structure. */ 3585 3586struct aout_final_link_info 3587{ 3588 /* General link information. */ 3589 struct bfd_link_info *info; 3590 /* Output bfd. */ 3591 bfd *output_bfd; 3592 /* Reloc file positions. */ 3593 file_ptr treloff, dreloff; 3594 /* File position of symbols. */ 3595 file_ptr symoff; 3596 /* String table. */ 3597 struct bfd_strtab_hash *strtab; 3598 /* Header file hash table. */ 3599 struct aout_link_includes_table includes; 3600 /* A buffer large enough to hold the contents of any section. */ 3601 bfd_byte *contents; 3602 /* A buffer large enough to hold the relocs of any section. */ 3603 PTR relocs; 3604 /* A buffer large enough to hold the symbol map of any input BFD. */ 3605 int *symbol_map; 3606 /* A buffer large enough to hold output symbols of any input BFD. */ 3607 struct external_nlist *output_syms; 3608}; 3609 3610static struct bfd_hash_entry *aout_link_includes_newfunc 3611 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 3612static boolean aout_link_input_bfd 3613 PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); 3614static boolean aout_link_write_symbols 3615 PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); 3616static boolean aout_link_write_other_symbol 3617 PARAMS ((struct aout_link_hash_entry *, PTR)); 3618static boolean aout_link_input_section 3619 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3620 asection *input_section, file_ptr *reloff_ptr, 3621 bfd_size_type rel_size)); 3622static boolean aout_link_input_section_std 3623 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3624 asection *input_section, struct reloc_std_external *, 3625 bfd_size_type rel_size, bfd_byte *contents)); 3626static boolean aout_link_input_section_ext 3627 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3628 asection *input_section, struct reloc_ext_external *, 3629 bfd_size_type rel_size, bfd_byte *contents)); 3630static INLINE asection *aout_reloc_index_to_section 3631 PARAMS ((bfd *, int)); 3632static boolean aout_link_reloc_link_order 3633 PARAMS ((struct aout_final_link_info *, asection *, 3634 struct bfd_link_order *)); 3635 3636/* The function to create a new entry in the header file hash table. */ 3637 3638static struct bfd_hash_entry * 3639aout_link_includes_newfunc (entry, table, string) 3640 struct bfd_hash_entry *entry; 3641 struct bfd_hash_table *table; 3642 const char *string; 3643{ 3644 struct aout_link_includes_entry *ret = 3645 (struct aout_link_includes_entry *) entry; 3646 3647 /* Allocate the structure if it has not already been allocated by a 3648 subclass. */ 3649 if (ret == (struct aout_link_includes_entry *) NULL) 3650 ret = ((struct aout_link_includes_entry *) 3651 bfd_hash_allocate (table, 3652 sizeof (struct aout_link_includes_entry))); 3653 if (ret == (struct aout_link_includes_entry *) NULL) 3654 return (struct bfd_hash_entry *) ret; 3655 3656 /* Call the allocation method of the superclass. */ 3657 ret = ((struct aout_link_includes_entry *) 3658 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3659 if (ret) 3660 { 3661 /* Set local fields. */ 3662 ret->totals = NULL; 3663 } 3664 3665 return (struct bfd_hash_entry *) ret; 3666} 3667 3668/* Do the final link step. This is called on the output BFD. The 3669 INFO structure should point to a list of BFDs linked through the 3670 link_next field which can be used to find each BFD which takes part 3671 in the output. Also, each section in ABFD should point to a list 3672 of bfd_link_order structures which list all the input sections for 3673 the output section. */ 3674 3675boolean 3676NAME(aout,final_link) (abfd, info, callback) 3677 bfd *abfd; 3678 struct bfd_link_info *info; 3679 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); 3680{ 3681 struct aout_final_link_info aout_info; 3682 boolean includes_hash_initialized = false; 3683 register bfd *sub; 3684 bfd_size_type trsize, drsize; 3685 bfd_size_type max_contents_size; 3686 bfd_size_type max_relocs_size; 3687 bfd_size_type max_sym_count; 3688 bfd_size_type text_size; 3689 file_ptr text_end; 3690 register struct bfd_link_order *p; 3691 asection *o; 3692 boolean have_link_order_relocs; 3693 3694 if (info->shared) 3695 abfd->flags |= DYNAMIC; 3696 3697 aout_info.info = info; 3698 aout_info.output_bfd = abfd; 3699 aout_info.contents = NULL; 3700 aout_info.relocs = NULL; 3701 aout_info.symbol_map = NULL; 3702 aout_info.output_syms = NULL; 3703 3704 if (! bfd_hash_table_init_n (&aout_info.includes.root, 3705 aout_link_includes_newfunc, 3706 251)) 3707 goto error_return; 3708 includes_hash_initialized = true; 3709 3710 /* Figure out the largest section size. Also, if generating 3711 relocateable output, count the relocs. */ 3712 trsize = 0; 3713 drsize = 0; 3714 max_contents_size = 0; 3715 max_relocs_size = 0; 3716 max_sym_count = 0; 3717 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 3718 { 3719 bfd_size_type sz; 3720 3721 if (info->relocateable) 3722 { 3723 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 3724 { 3725 trsize += exec_hdr (sub)->a_trsize; 3726 drsize += exec_hdr (sub)->a_drsize; 3727 } 3728 else 3729 { 3730 /* FIXME: We need to identify the .text and .data sections 3731 and call get_reloc_upper_bound and canonicalize_reloc to 3732 work out the number of relocs needed, and then multiply 3733 by the reloc size. */ 3734 (*_bfd_error_handler) 3735 (_("%s: relocateable link from %s to %s not supported"), 3736 bfd_get_filename (abfd), 3737 sub->xvec->name, abfd->xvec->name); 3738 bfd_set_error (bfd_error_invalid_operation); 3739 goto error_return; 3740 } 3741 } 3742 3743 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 3744 { 3745 sz = bfd_section_size (sub, obj_textsec (sub)); 3746 if (sz > max_contents_size) 3747 max_contents_size = sz; 3748 sz = bfd_section_size (sub, obj_datasec (sub)); 3749 if (sz > max_contents_size) 3750 max_contents_size = sz; 3751 3752 sz = exec_hdr (sub)->a_trsize; 3753 if (sz > max_relocs_size) 3754 max_relocs_size = sz; 3755 sz = exec_hdr (sub)->a_drsize; 3756 if (sz > max_relocs_size) 3757 max_relocs_size = sz; 3758 3759 sz = obj_aout_external_sym_count (sub); 3760 if (sz > max_sym_count) 3761 max_sym_count = sz; 3762 } 3763 } 3764 3765 if (info->relocateable) 3766 { 3767 if (obj_textsec (abfd) != (asection *) NULL) 3768 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 3769 ->link_order_head) 3770 * obj_reloc_entry_size (abfd)); 3771 if (obj_datasec (abfd) != (asection *) NULL) 3772 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 3773 ->link_order_head) 3774 * obj_reloc_entry_size (abfd)); 3775 } 3776 3777 exec_hdr (abfd)->a_trsize = trsize; 3778 exec_hdr (abfd)->a_drsize = drsize; 3779 3780 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 3781 3782 /* Adjust the section sizes and vmas according to the magic number. 3783 This sets a_text, a_data and a_bss in the exec_hdr and sets the 3784 filepos for each section. */ 3785 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 3786 goto error_return; 3787 3788 /* The relocation and symbol file positions differ among a.out 3789 targets. We are passed a callback routine from the backend 3790 specific code to handle this. 3791 FIXME: At this point we do not know how much space the symbol 3792 table will require. This will not work for any (nonstandard) 3793 a.out target that needs to know the symbol table size before it 3794 can compute the relocation file positions. This may or may not 3795 be the case for the hp300hpux target, for example. */ 3796 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 3797 &aout_info.symoff); 3798 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 3799 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 3800 obj_sym_filepos (abfd) = aout_info.symoff; 3801 3802 /* We keep a count of the symbols as we output them. */ 3803 obj_aout_external_sym_count (abfd) = 0; 3804 3805 /* We accumulate the string table as we write out the symbols. */ 3806 aout_info.strtab = _bfd_stringtab_init (); 3807 if (aout_info.strtab == NULL) 3808 goto error_return; 3809 3810 /* Allocate buffers to hold section contents and relocs. */ 3811 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); 3812 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size); 3813 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *)); 3814 aout_info.output_syms = ((struct external_nlist *) 3815 bfd_malloc ((max_sym_count + 1) 3816 * sizeof (struct external_nlist))); 3817 if ((aout_info.contents == NULL && max_contents_size != 0) 3818 || (aout_info.relocs == NULL && max_relocs_size != 0) 3819 || (aout_info.symbol_map == NULL && max_sym_count != 0) 3820 || aout_info.output_syms == NULL) 3821 goto error_return; 3822 3823 /* If we have a symbol named __DYNAMIC, force it out now. This is 3824 required by SunOS. Doing this here rather than in sunos.c is a 3825 hack, but it's easier than exporting everything which would be 3826 needed. */ 3827 { 3828 struct aout_link_hash_entry *h; 3829 3830 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 3831 false, false, false); 3832 if (h != NULL) 3833 aout_link_write_other_symbol (h, &aout_info); 3834 } 3835 3836 /* The most time efficient way to do the link would be to read all 3837 the input object files into memory and then sort out the 3838 information into the output file. Unfortunately, that will 3839 probably use too much memory. Another method would be to step 3840 through everything that composes the text section and write it 3841 out, and then everything that composes the data section and write 3842 it out, and then write out the relocs, and then write out the 3843 symbols. Unfortunately, that requires reading stuff from each 3844 input file several times, and we will not be able to keep all the 3845 input files open simultaneously, and reopening them will be slow. 3846 3847 What we do is basically process one input file at a time. We do 3848 everything we need to do with an input file once--copy over the 3849 section contents, handle the relocation information, and write 3850 out the symbols--and then we throw away the information we read 3851 from it. This approach requires a lot of lseeks of the output 3852 file, which is unfortunate but still faster than reopening a lot 3853 of files. 3854 3855 We use the output_has_begun field of the input BFDs to see 3856 whether we have already handled it. */ 3857 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next) 3858 sub->output_has_begun = false; 3859 3860 /* Mark all sections which are to be included in the link. This 3861 will normally be every section. We need to do this so that we 3862 can identify any sections which the linker has decided to not 3863 include. */ 3864 for (o = abfd->sections; o != NULL; o = o->next) 3865 { 3866 for (p = o->link_order_head; p != NULL; p = p->next) 3867 { 3868 if (p->type == bfd_indirect_link_order) 3869 p->u.indirect.section->linker_mark = true; 3870 } 3871 } 3872 3873 have_link_order_relocs = false; 3874 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 3875 { 3876 for (p = o->link_order_head; 3877 p != (struct bfd_link_order *) NULL; 3878 p = p->next) 3879 { 3880 if (p->type == bfd_indirect_link_order 3881 && (bfd_get_flavour (p->u.indirect.section->owner) 3882 == bfd_target_aout_flavour)) 3883 { 3884 bfd *input_bfd; 3885 3886 input_bfd = p->u.indirect.section->owner; 3887 if (! input_bfd->output_has_begun) 3888 { 3889 if (! aout_link_input_bfd (&aout_info, input_bfd)) 3890 goto error_return; 3891 input_bfd->output_has_begun = true; 3892 } 3893 } 3894 else if (p->type == bfd_section_reloc_link_order 3895 || p->type == bfd_symbol_reloc_link_order) 3896 { 3897 /* These are handled below. */ 3898 have_link_order_relocs = true; 3899 } 3900 else 3901 { 3902 if (! _bfd_default_link_order (abfd, info, o, p)) 3903 goto error_return; 3904 } 3905 } 3906 } 3907 3908 /* Write out any symbols that we have not already written out. */ 3909 aout_link_hash_traverse (aout_hash_table (info), 3910 aout_link_write_other_symbol, 3911 (PTR) &aout_info); 3912 3913 /* Now handle any relocs we were asked to create by the linker. 3914 These did not come from any input file. We must do these after 3915 we have written out all the symbols, so that we know the symbol 3916 indices to use. */ 3917 if (have_link_order_relocs) 3918 { 3919 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 3920 { 3921 for (p = o->link_order_head; 3922 p != (struct bfd_link_order *) NULL; 3923 p = p->next) 3924 { 3925 if (p->type == bfd_section_reloc_link_order 3926 || p->type == bfd_symbol_reloc_link_order) 3927 { 3928 if (! aout_link_reloc_link_order (&aout_info, o, p)) 3929 goto error_return; 3930 } 3931 } 3932 } 3933 } 3934 3935 if (aout_info.contents != NULL) 3936 { 3937 free (aout_info.contents); 3938 aout_info.contents = NULL; 3939 } 3940 if (aout_info.relocs != NULL) 3941 { 3942 free (aout_info.relocs); 3943 aout_info.relocs = NULL; 3944 } 3945 if (aout_info.symbol_map != NULL) 3946 { 3947 free (aout_info.symbol_map); 3948 aout_info.symbol_map = NULL; 3949 } 3950 if (aout_info.output_syms != NULL) 3951 { 3952 free (aout_info.output_syms); 3953 aout_info.output_syms = NULL; 3954 } 3955 if (includes_hash_initialized) 3956 { 3957 bfd_hash_table_free (&aout_info.includes.root); 3958 includes_hash_initialized = false; 3959 } 3960 3961 /* Finish up any dynamic linking we may be doing. */ 3962 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 3963 { 3964 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 3965 goto error_return; 3966 } 3967 3968 /* Update the header information. */ 3969 abfd->symcount = obj_aout_external_sym_count (abfd); 3970 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 3971 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 3972 obj_textsec (abfd)->reloc_count = 3973 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 3974 obj_datasec (abfd)->reloc_count = 3975 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 3976 3977 /* Write out the string table, unless there are no symbols. */ 3978 if (abfd->symcount > 0) 3979 { 3980 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 3981 || ! emit_stringtab (abfd, aout_info.strtab)) 3982 goto error_return; 3983 } 3984 else if (obj_textsec (abfd)->reloc_count == 0 3985 && obj_datasec (abfd)->reloc_count == 0) 3986 { 3987 bfd_byte b; 3988 file_ptr pos; 3989 3990 b = 0; 3991 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1; 3992 if (bfd_seek (abfd, pos, SEEK_SET) != 0 3993 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) 3994 goto error_return; 3995 } 3996 3997 return true; 3998 3999 error_return: 4000 if (aout_info.contents != NULL) 4001 free (aout_info.contents); 4002 if (aout_info.relocs != NULL) 4003 free (aout_info.relocs); 4004 if (aout_info.symbol_map != NULL) 4005 free (aout_info.symbol_map); 4006 if (aout_info.output_syms != NULL) 4007 free (aout_info.output_syms); 4008 if (includes_hash_initialized) 4009 bfd_hash_table_free (&aout_info.includes.root); 4010 return false; 4011} 4012 4013/* Link an a.out input BFD into the output file. */ 4014 4015static boolean 4016aout_link_input_bfd (finfo, input_bfd) 4017 struct aout_final_link_info *finfo; 4018 bfd *input_bfd; 4019{ 4020 bfd_size_type sym_count; 4021 4022 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 4023 4024 /* If this is a dynamic object, it may need special handling. */ 4025 if ((input_bfd->flags & DYNAMIC) != 0 4026 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 4027 { 4028 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 4029 (finfo->info, input_bfd)); 4030 } 4031 4032 /* Get the symbols. We probably have them already, unless 4033 finfo->info->keep_memory is false. */ 4034 if (! aout_get_external_symbols (input_bfd)) 4035 return false; 4036 4037 sym_count = obj_aout_external_sym_count (input_bfd); 4038 4039 /* Write out the symbols and get a map of the new indices. The map 4040 is placed into finfo->symbol_map. */ 4041 if (! aout_link_write_symbols (finfo, input_bfd)) 4042 return false; 4043 4044 /* Relocate and write out the sections. These functions use the 4045 symbol map created by aout_link_write_symbols. The linker_mark 4046 field will be set if these sections are to be included in the 4047 link, which will normally be the case. */ 4048 if (obj_textsec (input_bfd)->linker_mark) 4049 { 4050 if (! aout_link_input_section (finfo, input_bfd, 4051 obj_textsec (input_bfd), 4052 &finfo->treloff, 4053 exec_hdr (input_bfd)->a_trsize)) 4054 return false; 4055 } 4056 if (obj_datasec (input_bfd)->linker_mark) 4057 { 4058 if (! aout_link_input_section (finfo, input_bfd, 4059 obj_datasec (input_bfd), 4060 &finfo->dreloff, 4061 exec_hdr (input_bfd)->a_drsize)) 4062 return false; 4063 } 4064 4065 /* If we are not keeping memory, we don't need the symbols any 4066 longer. We still need them if we are keeping memory, because the 4067 strings in the hash table point into them. */ 4068 if (! finfo->info->keep_memory) 4069 { 4070 if (! aout_link_free_symbols (input_bfd)) 4071 return false; 4072 } 4073 4074 return true; 4075} 4076 4077/* Adjust and write out the symbols for an a.out file. Set the new 4078 symbol indices into a symbol_map. */ 4079 4080static boolean 4081aout_link_write_symbols (finfo, input_bfd) 4082 struct aout_final_link_info *finfo; 4083 bfd *input_bfd; 4084{ 4085 bfd *output_bfd; 4086 bfd_size_type sym_count; 4087 char *strings; 4088 enum bfd_link_strip strip; 4089 enum bfd_link_discard discard; 4090 struct external_nlist *outsym; 4091 bfd_size_type strtab_index; 4092 register struct external_nlist *sym; 4093 struct external_nlist *sym_end; 4094 struct aout_link_hash_entry **sym_hash; 4095 int *symbol_map; 4096 boolean pass; 4097 boolean skip_next; 4098 4099 output_bfd = finfo->output_bfd; 4100 sym_count = obj_aout_external_sym_count (input_bfd); 4101 strings = obj_aout_external_strings (input_bfd); 4102 strip = finfo->info->strip; 4103 discard = finfo->info->discard; 4104 outsym = finfo->output_syms; 4105 4106 /* First write out a symbol for this object file, unless we are 4107 discarding such symbols. */ 4108 if (strip != strip_all 4109 && (strip != strip_some 4110 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, 4111 false, false) != NULL) 4112 && discard != discard_all) 4113 { 4114 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); 4115 H_PUT_8 (output_bfd, 0, outsym->e_other); 4116 H_PUT_16 (output_bfd, 0, outsym->e_desc); 4117 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4118 input_bfd->filename, false); 4119 if (strtab_index == (bfd_size_type) -1) 4120 return false; 4121 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4122 PUT_WORD (output_bfd, 4123 (bfd_get_section_vma (output_bfd, 4124 obj_textsec (input_bfd)->output_section) 4125 + obj_textsec (input_bfd)->output_offset), 4126 outsym->e_value); 4127 ++obj_aout_external_sym_count (output_bfd); 4128 ++outsym; 4129 } 4130 4131 pass = false; 4132 skip_next = false; 4133 sym = obj_aout_external_syms (input_bfd); 4134 sym_end = sym + sym_count; 4135 sym_hash = obj_aout_sym_hashes (input_bfd); 4136 symbol_map = finfo->symbol_map; 4137 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); 4138 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4139 { 4140 const char *name; 4141 int type; 4142 struct aout_link_hash_entry *h; 4143 boolean skip; 4144 asection *symsec; 4145 bfd_vma val = 0; 4146 boolean copy; 4147 4148 /* We set *symbol_map to 0 above for all symbols. If it has 4149 already been set to -1 for this symbol, it means that we are 4150 discarding it because it appears in a duplicate header file. 4151 See the N_BINCL code below. */ 4152 if (*symbol_map == -1) 4153 continue; 4154 4155 /* Initialize *symbol_map to -1, which means that the symbol was 4156 not copied into the output file. We will change it later if 4157 we do copy the symbol over. */ 4158 *symbol_map = -1; 4159 4160 type = H_GET_8 (input_bfd, sym->e_type); 4161 name = strings + GET_WORD (input_bfd, sym->e_strx); 4162 4163 h = NULL; 4164 4165 if (pass) 4166 { 4167 /* Pass this symbol through. It is the target of an 4168 indirect or warning symbol. */ 4169 val = GET_WORD (input_bfd, sym->e_value); 4170 pass = false; 4171 } 4172 else if (skip_next) 4173 { 4174 /* Skip this symbol, which is the target of an indirect 4175 symbol that we have changed to no longer be an indirect 4176 symbol. */ 4177 skip_next = false; 4178 continue; 4179 } 4180 else 4181 { 4182 struct aout_link_hash_entry *hresolve; 4183 4184 /* We have saved the hash table entry for this symbol, if 4185 there is one. Note that we could just look it up again 4186 in the hash table, provided we first check that it is an 4187 external symbol. */ 4188 h = *sym_hash; 4189 4190 /* Use the name from the hash table, in case the symbol was 4191 wrapped. */ 4192 if (h != NULL) 4193 name = h->root.root.string; 4194 4195 /* If this is an indirect or warning symbol, then change 4196 hresolve to the base symbol. We also change *sym_hash so 4197 that the relocation routines relocate against the real 4198 symbol. */ 4199 hresolve = h; 4200 if (h != (struct aout_link_hash_entry *) NULL 4201 && (h->root.type == bfd_link_hash_indirect 4202 || h->root.type == bfd_link_hash_warning)) 4203 { 4204 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4205 while (hresolve->root.type == bfd_link_hash_indirect 4206 || hresolve->root.type == bfd_link_hash_warning) 4207 hresolve = ((struct aout_link_hash_entry *) 4208 hresolve->root.u.i.link); 4209 *sym_hash = hresolve; 4210 } 4211 4212 /* If the symbol has already been written out, skip it. */ 4213 if (h != (struct aout_link_hash_entry *) NULL 4214 && h->root.type != bfd_link_hash_warning 4215 && h->written) 4216 { 4217 if ((type & N_TYPE) == N_INDR 4218 || type == N_WARNING) 4219 skip_next = true; 4220 *symbol_map = h->indx; 4221 continue; 4222 } 4223 4224 /* See if we are stripping this symbol. */ 4225 skip = false; 4226 switch (strip) 4227 { 4228 case strip_none: 4229 break; 4230 case strip_debugger: 4231 if ((type & N_STAB) != 0) 4232 skip = true; 4233 break; 4234 case strip_some: 4235 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) 4236 == NULL) 4237 skip = true; 4238 break; 4239 case strip_all: 4240 skip = true; 4241 break; 4242 } 4243 if (skip) 4244 { 4245 if (h != (struct aout_link_hash_entry *) NULL) 4246 h->written = true; 4247 continue; 4248 } 4249 4250 /* Get the value of the symbol. */ 4251 if ((type & N_TYPE) == N_TEXT 4252 || type == N_WEAKT) 4253 symsec = obj_textsec (input_bfd); 4254 else if ((type & N_TYPE) == N_DATA 4255 || type == N_WEAKD) 4256 symsec = obj_datasec (input_bfd); 4257 else if ((type & N_TYPE) == N_BSS 4258 || type == N_WEAKB) 4259 symsec = obj_bsssec (input_bfd); 4260 else if ((type & N_TYPE) == N_ABS 4261 || type == N_WEAKA) 4262 symsec = bfd_abs_section_ptr; 4263 else if (((type & N_TYPE) == N_INDR 4264 && (hresolve == (struct aout_link_hash_entry *) NULL 4265 || (hresolve->root.type != bfd_link_hash_defined 4266 && hresolve->root.type != bfd_link_hash_defweak 4267 && hresolve->root.type != bfd_link_hash_common))) 4268 || type == N_WARNING) 4269 { 4270 /* Pass the next symbol through unchanged. The 4271 condition above for indirect symbols is so that if 4272 the indirect symbol was defined, we output it with 4273 the correct definition so the debugger will 4274 understand it. */ 4275 pass = true; 4276 val = GET_WORD (input_bfd, sym->e_value); 4277 symsec = NULL; 4278 } 4279 else if ((type & N_STAB) != 0) 4280 { 4281 val = GET_WORD (input_bfd, sym->e_value); 4282 symsec = NULL; 4283 } 4284 else 4285 { 4286 /* If we get here with an indirect symbol, it means that 4287 we are outputting it with a real definition. In such 4288 a case we do not want to output the next symbol, 4289 which is the target of the indirection. */ 4290 if ((type & N_TYPE) == N_INDR) 4291 skip_next = true; 4292 4293 symsec = NULL; 4294 4295 /* We need to get the value from the hash table. We use 4296 hresolve so that if we have defined an indirect 4297 symbol we output the final definition. */ 4298 if (h == (struct aout_link_hash_entry *) NULL) 4299 { 4300 switch (type & N_TYPE) 4301 { 4302 case N_SETT: 4303 symsec = obj_textsec (input_bfd); 4304 break; 4305 case N_SETD: 4306 symsec = obj_datasec (input_bfd); 4307 break; 4308 case N_SETB: 4309 symsec = obj_bsssec (input_bfd); 4310 break; 4311 case N_SETA: 4312 symsec = bfd_abs_section_ptr; 4313 break; 4314 default: 4315 val = 0; 4316 break; 4317 } 4318 } 4319 else if (hresolve->root.type == bfd_link_hash_defined 4320 || hresolve->root.type == bfd_link_hash_defweak) 4321 { 4322 asection *input_section; 4323 asection *output_section; 4324 4325 /* This case usually means a common symbol which was 4326 turned into a defined symbol. */ 4327 input_section = hresolve->root.u.def.section; 4328 output_section = input_section->output_section; 4329 BFD_ASSERT (bfd_is_abs_section (output_section) 4330 || output_section->owner == output_bfd); 4331 val = (hresolve->root.u.def.value 4332 + bfd_get_section_vma (output_bfd, output_section) 4333 + input_section->output_offset); 4334 4335 /* Get the correct type based on the section. If 4336 this is a constructed set, force it to be 4337 globally visible. */ 4338 if (type == N_SETT 4339 || type == N_SETD 4340 || type == N_SETB 4341 || type == N_SETA) 4342 type |= N_EXT; 4343 4344 type &=~ N_TYPE; 4345 4346 if (output_section == obj_textsec (output_bfd)) 4347 type |= (hresolve->root.type == bfd_link_hash_defined 4348 ? N_TEXT 4349 : N_WEAKT); 4350 else if (output_section == obj_datasec (output_bfd)) 4351 type |= (hresolve->root.type == bfd_link_hash_defined 4352 ? N_DATA 4353 : N_WEAKD); 4354 else if (output_section == obj_bsssec (output_bfd)) 4355 type |= (hresolve->root.type == bfd_link_hash_defined 4356 ? N_BSS 4357 : N_WEAKB); 4358 else 4359 type |= (hresolve->root.type == bfd_link_hash_defined 4360 ? N_ABS 4361 : N_WEAKA); 4362 } 4363 else if (hresolve->root.type == bfd_link_hash_common) 4364 val = hresolve->root.u.c.size; 4365 else if (hresolve->root.type == bfd_link_hash_undefweak) 4366 { 4367 val = 0; 4368 type = N_WEAKU; 4369 } 4370 else 4371 val = 0; 4372 } 4373 if (symsec != (asection *) NULL) 4374 val = (symsec->output_section->vma 4375 + symsec->output_offset 4376 + (GET_WORD (input_bfd, sym->e_value) 4377 - symsec->vma)); 4378 4379 /* If this is a global symbol set the written flag, and if 4380 it is a local symbol see if we should discard it. */ 4381 if (h != (struct aout_link_hash_entry *) NULL) 4382 { 4383 h->written = true; 4384 h->indx = obj_aout_external_sym_count (output_bfd); 4385 } 4386 else if ((type & N_TYPE) != N_SETT 4387 && (type & N_TYPE) != N_SETD 4388 && (type & N_TYPE) != N_SETB 4389 && (type & N_TYPE) != N_SETA) 4390 { 4391 switch (discard) 4392 { 4393 case discard_none: 4394 case discard_sec_merge: 4395 break; 4396 case discard_l: 4397 if ((type & N_STAB) == 0 4398 && bfd_is_local_label_name (input_bfd, name)) 4399 skip = true; 4400 break; 4401 case discard_all: 4402 skip = true; 4403 break; 4404 } 4405 if (skip) 4406 { 4407 pass = false; 4408 continue; 4409 } 4410 } 4411 4412 /* An N_BINCL symbol indicates the start of the stabs 4413 entries for a header file. We need to scan ahead to the 4414 next N_EINCL symbol, ignoring nesting, adding up all the 4415 characters in the symbol names, not including the file 4416 numbers in types (the first number after an open 4417 parenthesis). */ 4418 if (type == N_BINCL) 4419 { 4420 struct external_nlist *incl_sym; 4421 int nest; 4422 struct aout_link_includes_entry *incl_entry; 4423 struct aout_link_includes_totals *t; 4424 4425 val = 0; 4426 nest = 0; 4427 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 4428 { 4429 int incl_type; 4430 4431 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 4432 if (incl_type == N_EINCL) 4433 { 4434 if (nest == 0) 4435 break; 4436 --nest; 4437 } 4438 else if (incl_type == N_BINCL) 4439 ++nest; 4440 else if (nest == 0) 4441 { 4442 const char *s; 4443 4444 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 4445 for (; *s != '\0'; s++) 4446 { 4447 val += *s; 4448 if (*s == '(') 4449 { 4450 /* Skip the file number. */ 4451 ++s; 4452 while (ISDIGIT (*s)) 4453 ++s; 4454 --s; 4455 } 4456 } 4457 } 4458 } 4459 4460 /* If we have already included a header file with the 4461 same value, then replace this one with an N_EXCL 4462 symbol. */ 4463 copy = ! finfo->info->keep_memory; 4464 incl_entry = aout_link_includes_lookup (&finfo->includes, 4465 name, true, copy); 4466 if (incl_entry == NULL) 4467 return false; 4468 for (t = incl_entry->totals; t != NULL; t = t->next) 4469 if (t->total == val) 4470 break; 4471 if (t == NULL) 4472 { 4473 /* This is the first time we have seen this header 4474 file with this set of stabs strings. */ 4475 t = ((struct aout_link_includes_totals *) 4476 bfd_hash_allocate (&finfo->includes.root, 4477 sizeof *t)); 4478 if (t == NULL) 4479 return false; 4480 t->total = val; 4481 t->next = incl_entry->totals; 4482 incl_entry->totals = t; 4483 } 4484 else 4485 { 4486 int *incl_map; 4487 4488 /* This is a duplicate header file. We must change 4489 it to be an N_EXCL entry, and mark all the 4490 included symbols to prevent outputting them. */ 4491 type = N_EXCL; 4492 4493 nest = 0; 4494 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 4495 incl_sym < sym_end; 4496 incl_sym++, incl_map++) 4497 { 4498 int incl_type; 4499 4500 incl_type = H_GET_8 (input_bfd, incl_sym->e_type); 4501 if (incl_type == N_EINCL) 4502 { 4503 if (nest == 0) 4504 { 4505 *incl_map = -1; 4506 break; 4507 } 4508 --nest; 4509 } 4510 else if (incl_type == N_BINCL) 4511 ++nest; 4512 else if (nest == 0) 4513 *incl_map = -1; 4514 } 4515 } 4516 } 4517 } 4518 4519 /* Copy this symbol into the list of symbols we are going to 4520 write out. */ 4521 H_PUT_8 (output_bfd, type, outsym->e_type); 4522 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other); 4523 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc); 4524 copy = false; 4525 if (! finfo->info->keep_memory) 4526 { 4527 /* name points into a string table which we are going to 4528 free. If there is a hash table entry, use that string. 4529 Otherwise, copy name into memory. */ 4530 if (h != (struct aout_link_hash_entry *) NULL) 4531 name = h->root.root.string; 4532 else 4533 copy = true; 4534 } 4535 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4536 name, copy); 4537 if (strtab_index == (bfd_size_type) -1) 4538 return false; 4539 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4540 PUT_WORD (output_bfd, val, outsym->e_value); 4541 *symbol_map = obj_aout_external_sym_count (output_bfd); 4542 ++obj_aout_external_sym_count (output_bfd); 4543 ++outsym; 4544 } 4545 4546 /* Write out the output symbols we have just constructed. */ 4547 if (outsym > finfo->output_syms) 4548 { 4549 bfd_size_type outsym_size; 4550 4551 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) 4552 return false; 4553 outsym_size = outsym - finfo->output_syms; 4554 outsym_size *= EXTERNAL_NLIST_SIZE; 4555 if (bfd_bwrite ((PTR) finfo->output_syms, outsym_size, output_bfd) 4556 != outsym_size) 4557 return false; 4558 finfo->symoff += outsym_size; 4559 } 4560 4561 return true; 4562} 4563 4564/* Write out a symbol that was not associated with an a.out input 4565 object. */ 4566 4567static boolean 4568aout_link_write_other_symbol (h, data) 4569 struct aout_link_hash_entry *h; 4570 PTR data; 4571{ 4572 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; 4573 bfd *output_bfd; 4574 int type; 4575 bfd_vma val; 4576 struct external_nlist outsym; 4577 bfd_size_type indx; 4578 bfd_size_type amt; 4579 4580 if (h->root.type == bfd_link_hash_warning) 4581 { 4582 h = (struct aout_link_hash_entry *) h->root.u.i.link; 4583 if (h->root.type == bfd_link_hash_new) 4584 return true; 4585 } 4586 4587 output_bfd = finfo->output_bfd; 4588 4589 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 4590 { 4591 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 4592 (output_bfd, finfo->info, h))) 4593 { 4594 /* FIXME: No way to handle errors. */ 4595 abort (); 4596 } 4597 } 4598 4599 if (h->written) 4600 return true; 4601 4602 h->written = true; 4603 4604 /* An indx of -2 means the symbol must be written. */ 4605 if (h->indx != -2 4606 && (finfo->info->strip == strip_all 4607 || (finfo->info->strip == strip_some 4608 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, 4609 false, false) == NULL))) 4610 return true; 4611 4612 switch (h->root.type) 4613 { 4614 default: 4615 case bfd_link_hash_warning: 4616 abort (); 4617 /* Avoid variable not initialized warnings. */ 4618 return true; 4619 case bfd_link_hash_new: 4620 /* This can happen for set symbols when sets are not being 4621 built. */ 4622 return true; 4623 case bfd_link_hash_undefined: 4624 type = N_UNDF | N_EXT; 4625 val = 0; 4626 break; 4627 case bfd_link_hash_defined: 4628 case bfd_link_hash_defweak: 4629 { 4630 asection *sec; 4631 4632 sec = h->root.u.def.section->output_section; 4633 BFD_ASSERT (bfd_is_abs_section (sec) 4634 || sec->owner == output_bfd); 4635 if (sec == obj_textsec (output_bfd)) 4636 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 4637 else if (sec == obj_datasec (output_bfd)) 4638 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 4639 else if (sec == obj_bsssec (output_bfd)) 4640 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 4641 else 4642 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 4643 type |= N_EXT; 4644 val = (h->root.u.def.value 4645 + sec->vma 4646 + h->root.u.def.section->output_offset); 4647 } 4648 break; 4649 case bfd_link_hash_common: 4650 type = N_UNDF | N_EXT; 4651 val = h->root.u.c.size; 4652 break; 4653 case bfd_link_hash_undefweak: 4654 type = N_WEAKU; 4655 val = 0; 4656 case bfd_link_hash_indirect: 4657 /* We ignore these symbols, since the indirected symbol is 4658 already in the hash table. */ 4659 return true; 4660 } 4661 4662 H_PUT_8 (output_bfd, type, outsym.e_type); 4663 H_PUT_8 (output_bfd, 0, outsym.e_other); 4664 H_PUT_16 (output_bfd, 0, outsym.e_desc); 4665 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, 4666 false); 4667 if (indx == - (bfd_size_type) 1) 4668 { 4669 /* FIXME: No way to handle errors. */ 4670 abort (); 4671 } 4672 PUT_WORD (output_bfd, indx, outsym.e_strx); 4673 PUT_WORD (output_bfd, val, outsym.e_value); 4674 4675 amt = EXTERNAL_NLIST_SIZE; 4676 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 4677 || bfd_bwrite ((PTR) &outsym, amt, output_bfd) != amt) 4678 { 4679 /* FIXME: No way to handle errors. */ 4680 abort (); 4681 } 4682 4683 finfo->symoff += EXTERNAL_NLIST_SIZE; 4684 h->indx = obj_aout_external_sym_count (output_bfd); 4685 ++obj_aout_external_sym_count (output_bfd); 4686 4687 return true; 4688} 4689 4690/* Link an a.out section into the output file. */ 4691 4692static boolean 4693aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr, 4694 rel_size) 4695 struct aout_final_link_info *finfo; 4696 bfd *input_bfd; 4697 asection *input_section; 4698 file_ptr *reloff_ptr; 4699 bfd_size_type rel_size; 4700{ 4701 bfd_size_type input_size; 4702 PTR relocs; 4703 4704 /* Get the section contents. */ 4705 input_size = bfd_section_size (input_bfd, input_section); 4706 if (! bfd_get_section_contents (input_bfd, input_section, 4707 (PTR) finfo->contents, 4708 (file_ptr) 0, input_size)) 4709 return false; 4710 4711 /* Read in the relocs if we haven't already done it. */ 4712 if (aout_section_data (input_section) != NULL 4713 && aout_section_data (input_section)->relocs != NULL) 4714 relocs = aout_section_data (input_section)->relocs; 4715 else 4716 { 4717 relocs = finfo->relocs; 4718 if (rel_size > 0) 4719 { 4720 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4721 || bfd_bread (relocs, rel_size, input_bfd) != rel_size) 4722 return false; 4723 } 4724 } 4725 4726 /* Relocate the section contents. */ 4727 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4728 { 4729 if (! aout_link_input_section_std (finfo, input_bfd, input_section, 4730 (struct reloc_std_external *) relocs, 4731 rel_size, finfo->contents)) 4732 return false; 4733 } 4734 else 4735 { 4736 if (! aout_link_input_section_ext (finfo, input_bfd, input_section, 4737 (struct reloc_ext_external *) relocs, 4738 rel_size, finfo->contents)) 4739 return false; 4740 } 4741 4742 /* Write out the section contents. */ 4743 if (! bfd_set_section_contents (finfo->output_bfd, 4744 input_section->output_section, 4745 (PTR) finfo->contents, 4746 (file_ptr) input_section->output_offset, 4747 input_size)) 4748 return false; 4749 4750 /* If we are producing relocateable output, the relocs were 4751 modified, and we now write them out. */ 4752 if (finfo->info->relocateable && rel_size > 0) 4753 { 4754 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4755 return false; 4756 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size) 4757 return false; 4758 *reloff_ptr += rel_size; 4759 4760 /* Assert that the relocs have not run into the symbols, and 4761 that if these are the text relocs they have not run into the 4762 data relocs. */ 4763 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 4764 && (reloff_ptr != &finfo->treloff 4765 || (*reloff_ptr 4766 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 4767 } 4768 4769 return true; 4770} 4771 4772/* Get the section corresponding to a reloc index. */ 4773 4774static INLINE asection * 4775aout_reloc_index_to_section (abfd, indx) 4776 bfd *abfd; 4777 int indx; 4778{ 4779 switch (indx & N_TYPE) 4780 { 4781 case N_TEXT: 4782 return obj_textsec (abfd); 4783 case N_DATA: 4784 return obj_datasec (abfd); 4785 case N_BSS: 4786 return obj_bsssec (abfd); 4787 case N_ABS: 4788 case N_UNDF: 4789 return bfd_abs_section_ptr; 4790 default: 4791 abort (); 4792 } 4793 /*NOTREACHED*/ 4794 return NULL; 4795} 4796 4797/* Relocate an a.out section using standard a.out relocs. */ 4798 4799static boolean 4800aout_link_input_section_std (finfo, input_bfd, input_section, relocs, 4801 rel_size, contents) 4802 struct aout_final_link_info *finfo; 4803 bfd *input_bfd; 4804 asection *input_section; 4805 struct reloc_std_external *relocs; 4806 bfd_size_type rel_size; 4807 bfd_byte *contents; 4808{ 4809 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, 4810 bfd *, asection *, 4811 struct aout_link_hash_entry *, 4812 PTR, bfd_byte *, boolean *, 4813 bfd_vma *)); 4814 bfd *output_bfd; 4815 boolean relocateable; 4816 struct external_nlist *syms; 4817 char *strings; 4818 struct aout_link_hash_entry **sym_hashes; 4819 int *symbol_map; 4820 bfd_size_type reloc_count; 4821 register struct reloc_std_external *rel; 4822 struct reloc_std_external *rel_end; 4823 4824 output_bfd = finfo->output_bfd; 4825 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4826 4827 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 4828 BFD_ASSERT (input_bfd->xvec->header_byteorder 4829 == output_bfd->xvec->header_byteorder); 4830 4831 relocateable = finfo->info->relocateable; 4832 syms = obj_aout_external_syms (input_bfd); 4833 strings = obj_aout_external_strings (input_bfd); 4834 sym_hashes = obj_aout_sym_hashes (input_bfd); 4835 symbol_map = finfo->symbol_map; 4836 4837 reloc_count = rel_size / RELOC_STD_SIZE; 4838 rel = relocs; 4839 rel_end = rel + reloc_count; 4840 for (; rel < rel_end; rel++) 4841 { 4842 bfd_vma r_addr; 4843 int r_index; 4844 int r_extern; 4845 int r_pcrel; 4846 int r_baserel = 0; 4847 reloc_howto_type *howto; 4848 struct aout_link_hash_entry *h = NULL; 4849 bfd_vma relocation; 4850 bfd_reloc_status_type r; 4851 4852 r_addr = GET_SWORD (input_bfd, rel->r_address); 4853 4854#ifdef MY_reloc_howto 4855 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel); 4856#else 4857 { 4858 int r_jmptable; 4859 int r_relative; 4860 int r_length; 4861 unsigned int howto_idx; 4862 4863 if (bfd_header_big_endian (input_bfd)) 4864 { 4865 r_index = ((rel->r_index[0] << 16) 4866 | (rel->r_index[1] << 8) 4867 | rel->r_index[2]); 4868 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 4869 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 4870 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 4871 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 4872 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 4873 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 4874 >> RELOC_STD_BITS_LENGTH_SH_BIG); 4875 } 4876 else 4877 { 4878 r_index = ((rel->r_index[2] << 16) 4879 | (rel->r_index[1] << 8) 4880 | rel->r_index[0]); 4881 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 4882 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 4883 r_baserel = (0 != (rel->r_type[0] 4884 & RELOC_STD_BITS_BASEREL_LITTLE)); 4885 r_jmptable= (0 != (rel->r_type[0] 4886 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 4887 r_relative= (0 != (rel->r_type[0] 4888 & RELOC_STD_BITS_RELATIVE_LITTLE)); 4889 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 4890 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 4891 } 4892 4893 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 4894 + 16 * r_jmptable + 32 * r_relative); 4895 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 4896 howto = howto_table_std + howto_idx; 4897 } 4898#endif 4899 4900 if (relocateable) 4901 { 4902 /* We are generating a relocateable output file, and must 4903 modify the reloc accordingly. */ 4904 if (r_extern) 4905 { 4906 /* If we know the symbol this relocation is against, 4907 convert it into a relocation against a section. This 4908 is what the native linker does. */ 4909 h = sym_hashes[r_index]; 4910 if (h != (struct aout_link_hash_entry *) NULL 4911 && (h->root.type == bfd_link_hash_defined 4912 || h->root.type == bfd_link_hash_defweak)) 4913 { 4914 asection *output_section; 4915 4916 /* Change the r_extern value. */ 4917 if (bfd_header_big_endian (output_bfd)) 4918 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4919 else 4920 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4921 4922 /* Compute a new r_index. */ 4923 output_section = h->root.u.def.section->output_section; 4924 if (output_section == obj_textsec (output_bfd)) 4925 r_index = N_TEXT; 4926 else if (output_section == obj_datasec (output_bfd)) 4927 r_index = N_DATA; 4928 else if (output_section == obj_bsssec (output_bfd)) 4929 r_index = N_BSS; 4930 else 4931 r_index = N_ABS; 4932 4933 /* Add the symbol value and the section VMA to the 4934 addend stored in the contents. */ 4935 relocation = (h->root.u.def.value 4936 + output_section->vma 4937 + h->root.u.def.section->output_offset); 4938 } 4939 else 4940 { 4941 /* We must change r_index according to the symbol 4942 map. */ 4943 r_index = symbol_map[r_index]; 4944 4945 if (r_index == -1) 4946 { 4947 if (h != NULL) 4948 { 4949 /* We decided to strip this symbol, but it 4950 turns out that we can't. Note that we 4951 lose the other and desc information here. 4952 I don't think that will ever matter for a 4953 global symbol. */ 4954 if (h->indx < 0) 4955 { 4956 h->indx = -2; 4957 h->written = false; 4958 if (! aout_link_write_other_symbol (h, 4959 (PTR) finfo)) 4960 return false; 4961 } 4962 r_index = h->indx; 4963 } 4964 else 4965 { 4966 const char *name; 4967 4968 name = strings + GET_WORD (input_bfd, 4969 syms[r_index].e_strx); 4970 if (! ((*finfo->info->callbacks->unattached_reloc) 4971 (finfo->info, name, input_bfd, input_section, 4972 r_addr))) 4973 return false; 4974 r_index = 0; 4975 } 4976 } 4977 4978 relocation = 0; 4979 } 4980 4981 /* Write out the new r_index value. */ 4982 if (bfd_header_big_endian (output_bfd)) 4983 { 4984 rel->r_index[0] = r_index >> 16; 4985 rel->r_index[1] = r_index >> 8; 4986 rel->r_index[2] = r_index; 4987 } 4988 else 4989 { 4990 rel->r_index[2] = r_index >> 16; 4991 rel->r_index[1] = r_index >> 8; 4992 rel->r_index[0] = r_index; 4993 } 4994 } 4995 else 4996 { 4997 asection *section; 4998 4999 /* This is a relocation against a section. We must 5000 adjust by the amount that the section moved. */ 5001 section = aout_reloc_index_to_section (input_bfd, r_index); 5002 relocation = (section->output_section->vma 5003 + section->output_offset 5004 - section->vma); 5005 } 5006 5007 /* Change the address of the relocation. */ 5008 PUT_WORD (output_bfd, 5009 r_addr + input_section->output_offset, 5010 rel->r_address); 5011 5012 /* Adjust a PC relative relocation by removing the reference 5013 to the original address in the section and including the 5014 reference to the new address. */ 5015 if (r_pcrel) 5016 relocation -= (input_section->output_section->vma 5017 + input_section->output_offset 5018 - input_section->vma); 5019 5020#ifdef MY_relocatable_reloc 5021 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 5022#endif 5023 5024 if (relocation == 0) 5025 r = bfd_reloc_ok; 5026 else 5027 r = MY_relocate_contents (howto, 5028 input_bfd, relocation, 5029 contents + r_addr); 5030 } 5031 else 5032 { 5033 boolean hundef; 5034 5035 /* We are generating an executable, and must do a full 5036 relocation. */ 5037 hundef = false; 5038 5039 if (r_extern) 5040 { 5041 h = sym_hashes[r_index]; 5042 5043 if (h != (struct aout_link_hash_entry *) NULL 5044 && (h->root.type == bfd_link_hash_defined 5045 || h->root.type == bfd_link_hash_defweak)) 5046 { 5047 relocation = (h->root.u.def.value 5048 + h->root.u.def.section->output_section->vma 5049 + h->root.u.def.section->output_offset); 5050 } 5051 else if (h != (struct aout_link_hash_entry *) NULL 5052 && h->root.type == bfd_link_hash_undefweak) 5053 relocation = 0; 5054 else 5055 { 5056 hundef = true; 5057 relocation = 0; 5058 } 5059 } 5060 else 5061 { 5062 asection *section; 5063 5064 section = aout_reloc_index_to_section (input_bfd, r_index); 5065 relocation = (section->output_section->vma 5066 + section->output_offset 5067 - section->vma); 5068 if (r_pcrel) 5069 relocation += input_section->vma; 5070 } 5071 5072 if (check_dynamic_reloc != NULL) 5073 { 5074 boolean skip; 5075 5076 if (! ((*check_dynamic_reloc) 5077 (finfo->info, input_bfd, input_section, h, 5078 (PTR) rel, contents, &skip, &relocation))) 5079 return false; 5080 if (skip) 5081 continue; 5082 } 5083 5084 /* Now warn if a global symbol is undefined. We could not 5085 do this earlier, because check_dynamic_reloc might want 5086 to skip this reloc. */ 5087 if (hundef && ! finfo->info->shared && ! r_baserel) 5088 { 5089 const char *name; 5090 5091 if (h != NULL) 5092 name = h->root.root.string; 5093 else 5094 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 5095 if (! ((*finfo->info->callbacks->undefined_symbol) 5096 (finfo->info, name, input_bfd, input_section, 5097 r_addr, true))) 5098 return false; 5099 } 5100 5101 r = MY_final_link_relocate (howto, 5102 input_bfd, input_section, 5103 contents, r_addr, relocation, 5104 (bfd_vma) 0); 5105 } 5106 5107 if (r != bfd_reloc_ok) 5108 { 5109 switch (r) 5110 { 5111 default: 5112 case bfd_reloc_outofrange: 5113 abort (); 5114 case bfd_reloc_overflow: 5115 { 5116 const char *name; 5117 5118 if (h != NULL) 5119 name = h->root.root.string; 5120 else if (r_extern) 5121 name = strings + GET_WORD (input_bfd, 5122 syms[r_index].e_strx); 5123 else 5124 { 5125 asection *s; 5126 5127 s = aout_reloc_index_to_section (input_bfd, r_index); 5128 name = bfd_section_name (input_bfd, s); 5129 } 5130 if (! ((*finfo->info->callbacks->reloc_overflow) 5131 (finfo->info, name, howto->name, 5132 (bfd_vma) 0, input_bfd, input_section, r_addr))) 5133 return false; 5134 } 5135 break; 5136 } 5137 } 5138 } 5139 5140 return true; 5141} 5142 5143/* Relocate an a.out section using extended a.out relocs. */ 5144 5145static boolean 5146aout_link_input_section_ext (finfo, input_bfd, input_section, relocs, 5147 rel_size, contents) 5148 struct aout_final_link_info *finfo; 5149 bfd *input_bfd; 5150 asection *input_section; 5151 struct reloc_ext_external *relocs; 5152 bfd_size_type rel_size; 5153 bfd_byte *contents; 5154{ 5155 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, 5156 bfd *, asection *, 5157 struct aout_link_hash_entry *, 5158 PTR, bfd_byte *, boolean *, 5159 bfd_vma *)); 5160 bfd *output_bfd; 5161 boolean relocateable; 5162 struct external_nlist *syms; 5163 char *strings; 5164 struct aout_link_hash_entry **sym_hashes; 5165 int *symbol_map; 5166 bfd_size_type reloc_count; 5167 register struct reloc_ext_external *rel; 5168 struct reloc_ext_external *rel_end; 5169 5170 output_bfd = finfo->output_bfd; 5171 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 5172 5173 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 5174 BFD_ASSERT (input_bfd->xvec->header_byteorder 5175 == output_bfd->xvec->header_byteorder); 5176 5177 relocateable = finfo->info->relocateable; 5178 syms = obj_aout_external_syms (input_bfd); 5179 strings = obj_aout_external_strings (input_bfd); 5180 sym_hashes = obj_aout_sym_hashes (input_bfd); 5181 symbol_map = finfo->symbol_map; 5182 5183 reloc_count = rel_size / RELOC_EXT_SIZE; 5184 rel = relocs; 5185 rel_end = rel + reloc_count; 5186 for (; rel < rel_end; rel++) 5187 { 5188 bfd_vma r_addr; 5189 int r_index; 5190 int r_extern; 5191 unsigned int r_type; 5192 bfd_vma r_addend; 5193 struct aout_link_hash_entry *h = NULL; 5194 asection *r_section = NULL; 5195 bfd_vma relocation; 5196 5197 r_addr = GET_SWORD (input_bfd, rel->r_address); 5198 5199 if (bfd_header_big_endian (input_bfd)) 5200 { 5201 r_index = ((rel->r_index[0] << 16) 5202 | (rel->r_index[1] << 8) 5203 | rel->r_index[2]); 5204 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 5205 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 5206 >> RELOC_EXT_BITS_TYPE_SH_BIG); 5207 } 5208 else 5209 { 5210 r_index = ((rel->r_index[2] << 16) 5211 | (rel->r_index[1] << 8) 5212 | rel->r_index[0]); 5213 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 5214 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 5215 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 5216 } 5217 5218 r_addend = GET_SWORD (input_bfd, rel->r_addend); 5219 5220 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); 5221 5222 if (relocateable) 5223 { 5224 /* We are generating a relocateable output file, and must 5225 modify the reloc accordingly. */ 5226 if (r_extern 5227 || r_type == RELOC_BASE10 5228 || r_type == RELOC_BASE13 5229 || r_type == RELOC_BASE22) 5230 { 5231 /* If we know the symbol this relocation is against, 5232 convert it into a relocation against a section. This 5233 is what the native linker does. */ 5234 if (r_type == RELOC_BASE10 5235 || r_type == RELOC_BASE13 5236 || r_type == RELOC_BASE22) 5237 h = NULL; 5238 else 5239 h = sym_hashes[r_index]; 5240 if (h != (struct aout_link_hash_entry *) NULL 5241 && (h->root.type == bfd_link_hash_defined 5242 || h->root.type == bfd_link_hash_defweak)) 5243 { 5244 asection *output_section; 5245 5246 /* Change the r_extern value. */ 5247 if (bfd_header_big_endian (output_bfd)) 5248 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 5249 else 5250 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 5251 5252 /* Compute a new r_index. */ 5253 output_section = h->root.u.def.section->output_section; 5254 if (output_section == obj_textsec (output_bfd)) 5255 r_index = N_TEXT; 5256 else if (output_section == obj_datasec (output_bfd)) 5257 r_index = N_DATA; 5258 else if (output_section == obj_bsssec (output_bfd)) 5259 r_index = N_BSS; 5260 else 5261 r_index = N_ABS; 5262 5263 /* Add the symbol value and the section VMA to the 5264 addend. */ 5265 relocation = (h->root.u.def.value 5266 + output_section->vma 5267 + h->root.u.def.section->output_offset); 5268 5269 /* Now RELOCATION is the VMA of the final 5270 destination. If this is a PC relative reloc, 5271 then ADDEND is the negative of the source VMA. 5272 We want to set ADDEND to the difference between 5273 the destination VMA and the source VMA, which 5274 means we must adjust RELOCATION by the change in 5275 the source VMA. This is done below. */ 5276 } 5277 else 5278 { 5279 /* We must change r_index according to the symbol 5280 map. */ 5281 r_index = symbol_map[r_index]; 5282 5283 if (r_index == -1) 5284 { 5285 if (h != NULL) 5286 { 5287 /* We decided to strip this symbol, but it 5288 turns out that we can't. Note that we 5289 lose the other and desc information here. 5290 I don't think that will ever matter for a 5291 global symbol. */ 5292 if (h->indx < 0) 5293 { 5294 h->indx = -2; 5295 h->written = false; 5296 if (! aout_link_write_other_symbol (h, 5297 (PTR) finfo)) 5298 return false; 5299 } 5300 r_index = h->indx; 5301 } 5302 else 5303 { 5304 const char *name; 5305 5306 name = strings + GET_WORD (input_bfd, 5307 syms[r_index].e_strx); 5308 if (! ((*finfo->info->callbacks->unattached_reloc) 5309 (finfo->info, name, input_bfd, input_section, 5310 r_addr))) 5311 return false; 5312 r_index = 0; 5313 } 5314 } 5315 5316 relocation = 0; 5317 5318 /* If this is a PC relative reloc, then the addend 5319 is the negative of the source VMA. We must 5320 adjust it by the change in the source VMA. This 5321 is done below. */ 5322 } 5323 5324 /* Write out the new r_index value. */ 5325 if (bfd_header_big_endian (output_bfd)) 5326 { 5327 rel->r_index[0] = r_index >> 16; 5328 rel->r_index[1] = r_index >> 8; 5329 rel->r_index[2] = r_index; 5330 } 5331 else 5332 { 5333 rel->r_index[2] = r_index >> 16; 5334 rel->r_index[1] = r_index >> 8; 5335 rel->r_index[0] = r_index; 5336 } 5337 } 5338 else 5339 { 5340 /* This is a relocation against a section. We must 5341 adjust by the amount that the section moved. */ 5342 r_section = aout_reloc_index_to_section (input_bfd, r_index); 5343 relocation = (r_section->output_section->vma 5344 + r_section->output_offset 5345 - r_section->vma); 5346 5347 /* If this is a PC relative reloc, then the addend is 5348 the difference in VMA between the destination and the 5349 source. We have just adjusted for the change in VMA 5350 of the destination, so we must also adjust by the 5351 change in VMA of the source. This is done below. */ 5352 } 5353 5354 /* As described above, we must always adjust a PC relative 5355 reloc by the change in VMA of the source. However, if 5356 pcrel_offset is set, then the addend does not include the 5357 location within the section, in which case we don't need 5358 to adjust anything. */ 5359 if (howto_table_ext[r_type].pc_relative 5360 && ! howto_table_ext[r_type].pcrel_offset) 5361 relocation -= (input_section->output_section->vma 5362 + input_section->output_offset 5363 - input_section->vma); 5364 5365 /* Change the addend if necessary. */ 5366 if (relocation != 0) 5367 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 5368 5369 /* Change the address of the relocation. */ 5370 PUT_WORD (output_bfd, 5371 r_addr + input_section->output_offset, 5372 rel->r_address); 5373 } 5374 else 5375 { 5376 boolean hundef; 5377 bfd_reloc_status_type r; 5378 5379 /* We are generating an executable, and must do a full 5380 relocation. */ 5381 hundef = false; 5382 5383 if (r_extern) 5384 { 5385 h = sym_hashes[r_index]; 5386 5387 if (h != (struct aout_link_hash_entry *) NULL 5388 && (h->root.type == bfd_link_hash_defined 5389 || h->root.type == bfd_link_hash_defweak)) 5390 { 5391 relocation = (h->root.u.def.value 5392 + h->root.u.def.section->output_section->vma 5393 + h->root.u.def.section->output_offset); 5394 } 5395 else if (h != (struct aout_link_hash_entry *) NULL 5396 && h->root.type == bfd_link_hash_undefweak) 5397 relocation = 0; 5398 else 5399 { 5400 hundef = true; 5401 relocation = 0; 5402 } 5403 } 5404 else if (r_type == RELOC_BASE10 5405 || r_type == RELOC_BASE13 5406 || r_type == RELOC_BASE22) 5407 { 5408 struct external_nlist *sym; 5409 int type; 5410 5411 /* For base relative relocs, r_index is always an index 5412 into the symbol table, even if r_extern is 0. */ 5413 sym = syms + r_index; 5414 type = H_GET_8 (input_bfd, sym->e_type); 5415 if ((type & N_TYPE) == N_TEXT 5416 || type == N_WEAKT) 5417 r_section = obj_textsec (input_bfd); 5418 else if ((type & N_TYPE) == N_DATA 5419 || type == N_WEAKD) 5420 r_section = obj_datasec (input_bfd); 5421 else if ((type & N_TYPE) == N_BSS 5422 || type == N_WEAKB) 5423 r_section = obj_bsssec (input_bfd); 5424 else if ((type & N_TYPE) == N_ABS 5425 || type == N_WEAKA) 5426 r_section = bfd_abs_section_ptr; 5427 else 5428 abort (); 5429 relocation = (r_section->output_section->vma 5430 + r_section->output_offset 5431 + (GET_WORD (input_bfd, sym->e_value) 5432 - r_section->vma)); 5433 } 5434 else 5435 { 5436 r_section = aout_reloc_index_to_section (input_bfd, r_index); 5437 5438 /* If this is a PC relative reloc, then R_ADDEND is the 5439 difference between the two vmas, or 5440 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 5441 where 5442 old_dest_sec == section->vma 5443 and 5444 old_src_sec == input_section->vma 5445 and 5446 old_src_off == r_addr 5447 5448 _bfd_final_link_relocate expects RELOCATION + 5449 R_ADDEND to be the VMA of the destination minus 5450 r_addr (the minus r_addr is because this relocation 5451 is not pcrel_offset, which is a bit confusing and 5452 should, perhaps, be changed), or 5453 new_dest_sec 5454 where 5455 new_dest_sec == output_section->vma + output_offset 5456 We arrange for this to happen by setting RELOCATION to 5457 new_dest_sec + old_src_sec - old_dest_sec 5458 5459 If this is not a PC relative reloc, then R_ADDEND is 5460 simply the VMA of the destination, so we set 5461 RELOCATION to the change in the destination VMA, or 5462 new_dest_sec - old_dest_sec 5463 */ 5464 relocation = (r_section->output_section->vma 5465 + r_section->output_offset 5466 - r_section->vma); 5467 if (howto_table_ext[r_type].pc_relative) 5468 relocation += input_section->vma; 5469 } 5470 5471 if (check_dynamic_reloc != NULL) 5472 { 5473 boolean skip; 5474 5475 if (! ((*check_dynamic_reloc) 5476 (finfo->info, input_bfd, input_section, h, 5477 (PTR) rel, contents, &skip, &relocation))) 5478 return false; 5479 if (skip) 5480 continue; 5481 } 5482 5483 /* Now warn if a global symbol is undefined. We could not 5484 do this earlier, because check_dynamic_reloc might want 5485 to skip this reloc. */ 5486 if (hundef 5487 && ! finfo->info->shared 5488 && r_type != RELOC_BASE10 5489 && r_type != RELOC_BASE13 5490 && r_type != RELOC_BASE22) 5491 { 5492 const char *name; 5493 5494 if (h != NULL) 5495 name = h->root.root.string; 5496 else 5497 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 5498 if (! ((*finfo->info->callbacks->undefined_symbol) 5499 (finfo->info, name, input_bfd, input_section, 5500 r_addr, true))) 5501 return false; 5502 } 5503 5504 if (r_type != RELOC_SPARC_REV32) 5505 r = MY_final_link_relocate (howto_table_ext + r_type, 5506 input_bfd, input_section, 5507 contents, r_addr, relocation, 5508 r_addend); 5509 else 5510 { 5511 bfd_vma x; 5512 5513 x = bfd_get_32 (input_bfd, contents + r_addr); 5514 x = x + relocation + r_addend; 5515 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 5516 r = bfd_reloc_ok; 5517 } 5518 5519 if (r != bfd_reloc_ok) 5520 { 5521 switch (r) 5522 { 5523 default: 5524 case bfd_reloc_outofrange: 5525 abort (); 5526 case bfd_reloc_overflow: 5527 { 5528 const char *name; 5529 5530 if (h != NULL) 5531 name = h->root.root.string; 5532 else if (r_extern 5533 || r_type == RELOC_BASE10 5534 || r_type == RELOC_BASE13 5535 || r_type == RELOC_BASE22) 5536 name = strings + GET_WORD (input_bfd, 5537 syms[r_index].e_strx); 5538 else 5539 { 5540 asection *s; 5541 5542 s = aout_reloc_index_to_section (input_bfd, r_index); 5543 name = bfd_section_name (input_bfd, s); 5544 } 5545 if (! ((*finfo->info->callbacks->reloc_overflow) 5546 (finfo->info, name, howto_table_ext[r_type].name, 5547 r_addend, input_bfd, input_section, r_addr))) 5548 return false; 5549 } 5550 break; 5551 } 5552 } 5553 } 5554 } 5555 5556 return true; 5557} 5558 5559/* Handle a link order which is supposed to generate a reloc. */ 5560 5561static boolean 5562aout_link_reloc_link_order (finfo, o, p) 5563 struct aout_final_link_info *finfo; 5564 asection *o; 5565 struct bfd_link_order *p; 5566{ 5567 struct bfd_link_order_reloc *pr; 5568 int r_index; 5569 int r_extern; 5570 reloc_howto_type *howto; 5571 file_ptr *reloff_ptr = NULL; 5572 struct reloc_std_external srel; 5573 struct reloc_ext_external erel; 5574 PTR rel_ptr; 5575 bfd_size_type amt; 5576 5577 pr = p->u.reloc.p; 5578 5579 if (p->type == bfd_section_reloc_link_order) 5580 { 5581 r_extern = 0; 5582 if (bfd_is_abs_section (pr->u.section)) 5583 r_index = N_ABS | N_EXT; 5584 else 5585 { 5586 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); 5587 r_index = pr->u.section->target_index; 5588 } 5589 } 5590 else 5591 { 5592 struct aout_link_hash_entry *h; 5593 5594 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 5595 r_extern = 1; 5596 h = ((struct aout_link_hash_entry *) 5597 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, 5598 pr->u.name, false, false, true)); 5599 if (h != (struct aout_link_hash_entry *) NULL 5600 && h->indx >= 0) 5601 r_index = h->indx; 5602 else if (h != NULL) 5603 { 5604 /* We decided to strip this symbol, but it turns out that we 5605 can't. Note that we lose the other and desc information 5606 here. I don't think that will ever matter for a global 5607 symbol. */ 5608 h->indx = -2; 5609 h->written = false; 5610 if (! aout_link_write_other_symbol (h, (PTR) finfo)) 5611 return false; 5612 r_index = h->indx; 5613 } 5614 else 5615 { 5616 if (! ((*finfo->info->callbacks->unattached_reloc) 5617 (finfo->info, pr->u.name, (bfd *) NULL, 5618 (asection *) NULL, (bfd_vma) 0))) 5619 return false; 5620 r_index = 0; 5621 } 5622 } 5623 5624 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); 5625 if (howto == 0) 5626 { 5627 bfd_set_error (bfd_error_bad_value); 5628 return false; 5629 } 5630 5631 if (o == obj_textsec (finfo->output_bfd)) 5632 reloff_ptr = &finfo->treloff; 5633 else if (o == obj_datasec (finfo->output_bfd)) 5634 reloff_ptr = &finfo->dreloff; 5635 else 5636 abort (); 5637 5638 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) 5639 { 5640#ifdef MY_put_reloc 5641 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto, 5642 &srel); 5643#else 5644 { 5645 int r_pcrel; 5646 int r_baserel; 5647 int r_jmptable; 5648 int r_relative; 5649 int r_length; 5650 5651 r_pcrel = howto->pc_relative; 5652 r_baserel = (howto->type & 8) != 0; 5653 r_jmptable = (howto->type & 16) != 0; 5654 r_relative = (howto->type & 32) != 0; 5655 r_length = howto->size; 5656 5657 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); 5658 if (bfd_header_big_endian (finfo->output_bfd)) 5659 { 5660 srel.r_index[0] = r_index >> 16; 5661 srel.r_index[1] = r_index >> 8; 5662 srel.r_index[2] = r_index; 5663 srel.r_type[0] = 5664 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 5665 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 5666 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 5667 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 5668 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 5669 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 5670 } 5671 else 5672 { 5673 srel.r_index[2] = r_index >> 16; 5674 srel.r_index[1] = r_index >> 8; 5675 srel.r_index[0] = r_index; 5676 srel.r_type[0] = 5677 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 5678 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 5679 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 5680 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 5681 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 5682 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 5683 } 5684 } 5685#endif 5686 rel_ptr = (PTR) &srel; 5687 5688 /* We have to write the addend into the object file, since 5689 standard a.out relocs are in place. It would be more 5690 reliable if we had the current contents of the file here, 5691 rather than assuming zeroes, but we can't read the file since 5692 it was opened using bfd_openw. */ 5693 if (pr->addend != 0) 5694 { 5695 bfd_size_type size; 5696 bfd_reloc_status_type r; 5697 bfd_byte *buf; 5698 boolean ok; 5699 5700 size = bfd_get_reloc_size (howto); 5701 buf = (bfd_byte *) bfd_zmalloc (size); 5702 if (buf == (bfd_byte *) NULL) 5703 return false; 5704 r = MY_relocate_contents (howto, finfo->output_bfd, 5705 (bfd_vma) pr->addend, buf); 5706 switch (r) 5707 { 5708 case bfd_reloc_ok: 5709 break; 5710 default: 5711 case bfd_reloc_outofrange: 5712 abort (); 5713 case bfd_reloc_overflow: 5714 if (! ((*finfo->info->callbacks->reloc_overflow) 5715 (finfo->info, 5716 (p->type == bfd_section_reloc_link_order 5717 ? bfd_section_name (finfo->output_bfd, 5718 pr->u.section) 5719 : pr->u.name), 5720 howto->name, pr->addend, (bfd *) NULL, 5721 (asection *) NULL, (bfd_vma) 0))) 5722 { 5723 free (buf); 5724 return false; 5725 } 5726 break; 5727 } 5728 ok = bfd_set_section_contents (finfo->output_bfd, o, (PTR) buf, 5729 (file_ptr) p->offset, size); 5730 free (buf); 5731 if (! ok) 5732 return false; 5733 } 5734 } 5735 else 5736 { 5737#ifdef MY_put_ext_reloc 5738 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset, 5739 howto, &erel, pr->addend); 5740#else 5741 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); 5742 5743 if (bfd_header_big_endian (finfo->output_bfd)) 5744 { 5745 erel.r_index[0] = r_index >> 16; 5746 erel.r_index[1] = r_index >> 8; 5747 erel.r_index[2] = r_index; 5748 erel.r_type[0] = 5749 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 5750 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 5751 } 5752 else 5753 { 5754 erel.r_index[2] = r_index >> 16; 5755 erel.r_index[1] = r_index >> 8; 5756 erel.r_index[0] = r_index; 5757 erel.r_type[0] = 5758 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 5759 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 5760 } 5761 5762 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend); 5763#endif /* MY_put_ext_reloc */ 5764 5765 rel_ptr = (PTR) &erel; 5766 } 5767 5768 amt = obj_reloc_entry_size (finfo->output_bfd); 5769 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 5770 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt) 5771 return false; 5772 5773 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); 5774 5775 /* Assert that the relocs have not run into the symbols, and that n 5776 the text relocs have not run into the data relocs. */ 5777 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 5778 && (reloff_ptr != &finfo->treloff 5779 || (*reloff_ptr 5780 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 5781 5782 return true; 5783} 5784