aoutx.h revision 78828
1/* BFD semi-generic back-end for a.out binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 3 2001 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 <ctype.h> 124#include "bfd.h" 125#include "sysdep.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 *)); 142 143/* 144SUBSECTION 145 Relocations 146 147DESCRIPTION 148 The file @file{aoutx.h} provides for both the @emph{standard} 149 and @emph{extended} forms of a.out relocation records. 150 151 The standard records contain only an 152 address, a symbol index, and a type field. The extended records 153 (used on 29ks and sparcs) also have a full integer for an 154 addend. 155 156*/ 157#ifndef CTOR_TABLE_RELOC_HOWTO 158#define CTOR_TABLE_RELOC_IDX 2 159#define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \ 160 ? howto_table_ext : howto_table_std) \ 161 + CTOR_TABLE_RELOC_IDX) 162#endif 163 164#ifndef MY_swap_std_reloc_in 165#define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in) 166#endif 167 168#ifndef MY_swap_ext_reloc_in 169#define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in) 170#endif 171 172#ifndef MY_swap_std_reloc_out 173#define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out) 174#endif 175 176#ifndef MY_swap_ext_reloc_out 177#define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out) 178#endif 179 180#ifndef MY_final_link_relocate 181#define MY_final_link_relocate _bfd_final_link_relocate 182#endif 183 184#ifndef MY_relocate_contents 185#define MY_relocate_contents _bfd_relocate_contents 186#endif 187 188#define howto_table_ext NAME(aout,ext_howto_table) 189#define howto_table_std NAME(aout,std_howto_table) 190 191reloc_howto_type howto_table_ext[] = 192{ 193 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ 194 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false), 195 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false), 196 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false), 197 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false), 198 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false), 199 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false), 200 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false), 201 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false), 202 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false), 203 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false), 204 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false), 205 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false), 206 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false), 207 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false), 208 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false), 209 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false), 210 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false), 211 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true), 212 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true), 213 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false), 214 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false), 215 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false), 216 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false), 217 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), 218 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), 219 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), 220#define RELOC_SPARC_REV32 RELOC_WDISP19 221 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false), 222}; 223 224/* Convert standard reloc records to "arelent" format (incl byte swap). */ 225 226reloc_howto_type howto_table_std[] = { 227 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ 228HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false), 229HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false), 230HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false), 231HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false), 232HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false), 233HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false), 234HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false), 235HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false), 236HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false), 237HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false), 238HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false), 239EMPTY_HOWTO (-1), 240EMPTY_HOWTO (-1), 241EMPTY_HOWTO (-1), 242EMPTY_HOWTO (-1), 243EMPTY_HOWTO (-1), 244 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false), 245EMPTY_HOWTO (-1), 246EMPTY_HOWTO (-1), 247EMPTY_HOWTO (-1), 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), 260 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), 261EMPTY_HOWTO (-1), 262EMPTY_HOWTO (-1), 263EMPTY_HOWTO (-1), 264EMPTY_HOWTO (-1), 265EMPTY_HOWTO (-1), 266EMPTY_HOWTO (-1), 267EMPTY_HOWTO (-1), 268 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false), 269}; 270 271#define TABLE_SIZE(TABLE) (sizeof (TABLE)/sizeof (TABLE[0])) 272 273reloc_howto_type * 274NAME(aout,reloc_type_lookup) (abfd,code) 275 bfd *abfd; 276 bfd_reloc_code_real_type code; 277{ 278#define EXT(i,j) case i: return &howto_table_ext[j] 279#define STD(i,j) case i: return &howto_table_std[j] 280 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; 281 if (code == BFD_RELOC_CTOR) 282 switch (bfd_get_arch_info (abfd)->bits_per_address) 283 { 284 case 32: 285 code = BFD_RELOC_32; 286 break; 287 case 64: 288 code = BFD_RELOC_64; 289 break; 290 } 291 if (ext) 292 switch (code) 293 { 294 EXT (BFD_RELOC_8, 0); 295 EXT (BFD_RELOC_16, 1); 296 EXT (BFD_RELOC_32, 2); 297 EXT (BFD_RELOC_HI22, 8); 298 EXT (BFD_RELOC_LO10, 11); 299 EXT (BFD_RELOC_32_PCREL_S2, 6); 300 EXT (BFD_RELOC_SPARC_WDISP22, 7); 301 EXT (BFD_RELOC_SPARC13, 10); 302 EXT (BFD_RELOC_SPARC_GOT10, 14); 303 EXT (BFD_RELOC_SPARC_BASE13, 15); 304 EXT (BFD_RELOC_SPARC_GOT13, 15); 305 EXT (BFD_RELOC_SPARC_GOT22, 16); 306 EXT (BFD_RELOC_SPARC_PC10, 17); 307 EXT (BFD_RELOC_SPARC_PC22, 18); 308 EXT (BFD_RELOC_SPARC_WPLT30, 19); 309 EXT (BFD_RELOC_SPARC_REV32, 26); 310 default: return (reloc_howto_type *) NULL; 311 } 312 else 313 /* std relocs */ 314 switch (code) 315 { 316 STD (BFD_RELOC_16, 1); 317 STD (BFD_RELOC_32, 2); 318 STD (BFD_RELOC_8_PCREL, 4); 319 STD (BFD_RELOC_16_PCREL, 5); 320 STD (BFD_RELOC_32_PCREL, 6); 321 STD (BFD_RELOC_16_BASEREL, 9); 322 STD (BFD_RELOC_32_BASEREL, 10); 323 default: return (reloc_howto_type *) NULL; 324 } 325} 326 327/* 328SUBSECTION 329 Internal entry points 330 331DESCRIPTION 332 @file{aoutx.h} exports several routines for accessing the 333 contents of an a.out file, which are gathered and exported in 334 turn by various format specific files (eg sunos.c). 335 336*/ 337 338/* 339FUNCTION 340 aout_@var{size}_swap_exec_header_in 341 342SYNOPSIS 343 void aout_@var{size}_swap_exec_header_in, 344 (bfd *abfd, 345 struct external_exec *raw_bytes, 346 struct internal_exec *execp); 347 348DESCRIPTION 349 Swap the information in an executable header @var{raw_bytes} taken 350 from a raw byte stream memory image into the internal exec header 351 structure @var{execp}. 352*/ 353 354#ifndef NAME_swap_exec_header_in 355void 356NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp) 357 bfd *abfd; 358 struct external_exec *raw_bytes; 359 struct internal_exec *execp; 360{ 361 struct external_exec *bytes = (struct external_exec *)raw_bytes; 362 363 /* The internal_exec structure has some fields that are unused in this 364 configuration (IE for i960), so ensure that all such uninitialized 365 fields are zero'd out. There are places where two of these structs 366 are memcmp'd, and thus the contents do matter. */ 367 memset ((PTR) execp, 0, sizeof (struct internal_exec)); 368 /* Now fill in fields in the execp, from the bytes in the raw data. */ 369 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); 370 execp->a_text = GET_WORD (abfd, bytes->e_text); 371 execp->a_data = GET_WORD (abfd, bytes->e_data); 372 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 373 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 374 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 375 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 376 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 377} 378#define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in) 379#endif 380 381/* 382FUNCTION 383 aout_@var{size}_swap_exec_header_out 384 385SYNOPSIS 386 void aout_@var{size}_swap_exec_header_out 387 (bfd *abfd, 388 struct internal_exec *execp, 389 struct external_exec *raw_bytes); 390 391DESCRIPTION 392 Swap the information in an internal exec header structure 393 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. 394*/ 395void 396NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes) 397 bfd *abfd; 398 struct internal_exec *execp; 399 struct external_exec *raw_bytes; 400{ 401 struct external_exec *bytes = (struct external_exec *)raw_bytes; 402 403 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 404 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); 405 PUT_WORD (abfd, execp->a_text , bytes->e_text); 406 PUT_WORD (abfd, execp->a_data , bytes->e_data); 407 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 408 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 409 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 410 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 411 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 412} 413 414/* Make all the section for an a.out file. */ 415 416boolean 417NAME(aout,make_sections) (abfd) 418 bfd *abfd; 419{ 420 if (obj_textsec (abfd) == (asection *) NULL 421 && bfd_make_section (abfd, ".text") == (asection *) NULL) 422 return false; 423 if (obj_datasec (abfd) == (asection *) NULL 424 && bfd_make_section (abfd, ".data") == (asection *) NULL) 425 return false; 426 if (obj_bsssec (abfd) == (asection *) NULL 427 && bfd_make_section (abfd, ".bss") == (asection *) NULL) 428 return false; 429 return true; 430} 431 432/* 433FUNCTION 434 aout_@var{size}_some_aout_object_p 435 436SYNOPSIS 437 const bfd_target *aout_@var{size}_some_aout_object_p 438 (bfd *abfd, 439 const bfd_target *(*callback_to_real_object_p) ()); 440 441DESCRIPTION 442 Some a.out variant thinks that the file open in @var{abfd} 443 checking is an a.out file. Do some more checking, and set up 444 for access if it really is. Call back to the calling 445 environment's "finish up" function just before returning, to 446 handle any last-minute setup. 447*/ 448 449const bfd_target * 450NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p) 451 bfd *abfd; 452 struct internal_exec *execp; 453 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); 454{ 455 struct aout_data_struct *rawptr, *oldrawptr; 456 const bfd_target *result; 457 458 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct )); 459 if (rawptr == NULL) 460 return 0; 461 462 oldrawptr = abfd->tdata.aout_data; 463 abfd->tdata.aout_data = rawptr; 464 465 /* Copy the contents of the old tdata struct. 466 In particular, we want the subformat, since for hpux it was set in 467 hp300hpux.c:swap_exec_header_in and will be used in 468 hp300hpux.c:callback. */ 469 if (oldrawptr != NULL) 470 *abfd->tdata.aout_data = *oldrawptr; 471 472 abfd->tdata.aout_data->a.hdr = &rawptr->e; 473 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */ 474 execp = abfd->tdata.aout_data->a.hdr; 475 476 /* Set the file flags */ 477 abfd->flags = BFD_NO_FLAGS; 478 if (execp->a_drsize || execp->a_trsize) 479 abfd->flags |= HAS_RELOC; 480 /* Setting of EXEC_P has been deferred to the bottom of this function */ 481 if (execp->a_syms) 482 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; 483 if (N_DYNAMIC(*execp)) 484 abfd->flags |= DYNAMIC; 485 486 if (N_MAGIC (*execp) == ZMAGIC) 487 { 488 abfd->flags |= D_PAGED | WP_TEXT; 489 adata (abfd).magic = z_magic; 490 } 491 else if (N_MAGIC (*execp) == QMAGIC) 492 { 493 abfd->flags |= D_PAGED | WP_TEXT; 494 adata (abfd).magic = z_magic; 495 adata (abfd).subformat = q_magic_format; 496 } 497 else if (N_MAGIC (*execp) == NMAGIC) 498 { 499 abfd->flags |= WP_TEXT; 500 adata (abfd).magic = n_magic; 501 } 502 else if (N_MAGIC (*execp) == OMAGIC 503 || N_MAGIC (*execp) == BMAGIC) 504 adata (abfd).magic = o_magic; 505 else 506 { 507 /* Should have been checked with N_BADMAG before this routine 508 was called. */ 509 abort (); 510 } 511 512 bfd_get_start_address (abfd) = execp->a_entry; 513 514 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; 515 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); 516 517 /* The default relocation entry size is that of traditional V7 Unix. */ 518 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 519 520 /* The default symbol entry size is that of traditional Unix. */ 521 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; 522 523#ifdef USE_MMAP 524 bfd_init_window (&obj_aout_sym_window (abfd)); 525 bfd_init_window (&obj_aout_string_window (abfd)); 526#endif 527 obj_aout_external_syms (abfd) = NULL; 528 obj_aout_external_strings (abfd) = NULL; 529 obj_aout_sym_hashes (abfd) = NULL; 530 531 if (! NAME(aout,make_sections) (abfd)) 532 return NULL; 533 534 obj_datasec (abfd)->_raw_size = execp->a_data; 535 obj_bsssec (abfd)->_raw_size = execp->a_bss; 536 537 obj_textsec (abfd)->flags = 538 (execp->a_trsize != 0 539 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) 540 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); 541 obj_datasec (abfd)->flags = 542 (execp->a_drsize != 0 543 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) 544 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); 545 obj_bsssec (abfd)->flags = SEC_ALLOC; 546 547#ifdef THIS_IS_ONLY_DOCUMENTATION 548 /* The common code can't fill in these things because they depend 549 on either the start address of the text segment, the rounding 550 up of virtual addresses between segments, or the starting file 551 position of the text segment -- all of which varies among different 552 versions of a.out. */ 553 554 /* Call back to the format-dependent code to fill in the rest of the 555 fields and do any further cleanup. Things that should be filled 556 in by the callback: */ 557 558 struct exec *execp = exec_hdr (abfd); 559 560 obj_textsec (abfd)->size = N_TXTSIZE(*execp); 561 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp); 562 /* data and bss are already filled in since they're so standard */ 563 564 /* The virtual memory addresses of the sections */ 565 obj_textsec (abfd)->vma = N_TXTADDR(*execp); 566 obj_datasec (abfd)->vma = N_DATADDR(*execp); 567 obj_bsssec (abfd)->vma = N_BSSADDR(*execp); 568 569 /* The file offsets of the sections */ 570 obj_textsec (abfd)->filepos = N_TXTOFF(*execp); 571 obj_datasec (abfd)->filepos = N_DATOFF(*execp); 572 573 /* The file offsets of the relocation info */ 574 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); 575 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); 576 577 /* The file offsets of the string table and symbol table. */ 578 obj_str_filepos (abfd) = N_STROFF (*execp); 579 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 580 581 /* Determine the architecture and machine type of the object file. */ 582 switch (N_MACHTYPE (*exec_hdr (abfd))) { 583 default: 584 abfd->obj_arch = bfd_arch_obscure; 585 break; 586 } 587 588 adata(abfd)->page_size = TARGET_PAGE_SIZE; 589 adata(abfd)->segment_size = SEGMENT_SIZE; 590 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; 591 592 return abfd->xvec; 593 594 /* The architecture is encoded in various ways in various a.out variants, 595 or is not encoded at all in some of them. The relocation size depends 596 on the architecture and the a.out variant. Finally, the return value 597 is the bfd_target vector in use. If an error occurs, return zero and 598 set bfd_error to the appropriate error code. 599 600 Formats such as b.out, which have additional fields in the a.out 601 header, should cope with them in this callback as well. */ 602#endif /* DOCUMENTATION */ 603 604 result = (*callback_to_real_object_p) (abfd); 605 606 /* Now that the segment addresses have been worked out, take a better 607 guess at whether the file is executable. If the entry point 608 is within the text segment, assume it is. (This makes files 609 executable even if their entry point address is 0, as long as 610 their text starts at zero.). 611 612 This test had to be changed to deal with systems where the text segment 613 runs at a different location than the default. The problem is that the 614 entry address can appear to be outside the text segment, thus causing an 615 erroneous conclusion that the file isn't executable. 616 617 To fix this, we now accept any non-zero entry point as an indication of 618 executability. This will work most of the time, since only the linker 619 sets the entry point, and that is likely to be non-zero for most systems. */ 620 621 if (execp->a_entry != 0 622 || (execp->a_entry >= obj_textsec(abfd)->vma 623 && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size)) 624 abfd->flags |= EXEC_P; 625#ifdef STAT_FOR_EXEC 626 else 627 { 628 struct stat stat_buf; 629 630 /* The original heuristic doesn't work in some important cases. 631 The a.out file has no information about the text start 632 address. For files (like kernels) linked to non-standard 633 addresses (ld -Ttext nnn) the entry point may not be between 634 the default text start (obj_textsec(abfd)->vma) and 635 (obj_textsec(abfd)->vma) + text size. This is not just a mach 636 issue. Many kernels are loaded at non standard addresses. */ 637 if (abfd->iostream != NULL 638 && (abfd->flags & BFD_IN_MEMORY) == 0 639 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) 640 && ((stat_buf.st_mode & 0111) != 0)) 641 abfd->flags |= EXEC_P; 642 } 643#endif /* STAT_FOR_EXEC */ 644 645 if (result) 646 { 647#if 0 /* These should be set correctly anyways. */ 648 abfd->sections = obj_textsec (abfd); 649 obj_textsec (abfd)->next = obj_datasec (abfd); 650 obj_datasec (abfd)->next = obj_bsssec (abfd); 651#endif 652 } 653 else 654 { 655 free (rawptr); 656 abfd->tdata.aout_data = oldrawptr; 657 } 658 return result; 659} 660 661/* 662FUNCTION 663 aout_@var{size}_mkobject 664 665SYNOPSIS 666 boolean aout_@var{size}_mkobject, (bfd *abfd); 667 668DESCRIPTION 669 Initialize BFD @var{abfd} for use with a.out files. 670*/ 671 672boolean 673NAME(aout,mkobject) (abfd) 674 bfd *abfd; 675{ 676 struct aout_data_struct *rawptr; 677 678 bfd_set_error (bfd_error_system_call); 679 680 /* Use an intermediate variable for clarity */ 681 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct )); 682 683 if (rawptr == NULL) 684 return false; 685 686 abfd->tdata.aout_data = rawptr; 687 exec_hdr (abfd) = &(rawptr->e); 688 689 obj_textsec (abfd) = (asection *)NULL; 690 obj_datasec (abfd) = (asection *)NULL; 691 obj_bsssec (abfd) = (asection *)NULL; 692 693 return true; 694} 695 696/* 697FUNCTION 698 aout_@var{size}_machine_type 699 700SYNOPSIS 701 enum machine_type aout_@var{size}_machine_type 702 (enum bfd_architecture arch, 703 unsigned long machine)); 704 705DESCRIPTION 706 Keep track of machine architecture and machine type for 707 a.out's. Return the <<machine_type>> for a particular 708 architecture and machine, or <<M_UNKNOWN>> if that exact architecture 709 and machine can't be represented in a.out format. 710 711 If the architecture is understood, machine type 0 (default) 712 is always understood. 713*/ 714 715enum machine_type 716NAME(aout,machine_type) (arch, machine, unknown) 717 enum bfd_architecture arch; 718 unsigned long machine; 719 boolean *unknown; 720{ 721 enum machine_type arch_flags; 722 723 arch_flags = M_UNKNOWN; 724 *unknown = true; 725 726 switch (arch) { 727 case bfd_arch_sparc: 728 if (machine == 0 729 || machine == bfd_mach_sparc 730 || machine == bfd_mach_sparc_sparclite 731 || machine == bfd_mach_sparc_sparclite_le 732 || machine == bfd_mach_sparc_v9) 733 arch_flags = M_SPARC; 734 else if (machine == bfd_mach_sparc_sparclet) 735 arch_flags = M_SPARCLET; 736 break; 737 738 case bfd_arch_m68k: 739 switch (machine) { 740 case 0: arch_flags = M_68010; break; 741 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break; 742 case bfd_mach_m68010: arch_flags = M_68010; break; 743 case bfd_mach_m68020: arch_flags = M_68020; break; 744 default: arch_flags = M_UNKNOWN; break; 745 } 746 break; 747 748 case bfd_arch_i386: 749 if (machine == 0) arch_flags = M_386; 750 break; 751 752 case bfd_arch_a29k: 753 if (machine == 0) arch_flags = M_29K; 754 break; 755 756 case bfd_arch_arm: 757 if (machine == 0) arch_flags = M_ARM; 758 break; 759 760 case bfd_arch_mips: 761 switch (machine) { 762 case 0: 763 case bfd_mach_mips3000: 764 case bfd_mach_mips3900: 765 arch_flags = M_MIPS1; 766 break; 767 case bfd_mach_mips6000: 768 arch_flags = M_MIPS2; 769 break; 770 case bfd_mach_mips4000: 771 case bfd_mach_mips4010: 772 case bfd_mach_mips4100: 773 case bfd_mach_mips4300: 774 case bfd_mach_mips4400: 775 case bfd_mach_mips4600: 776 case bfd_mach_mips4650: 777 case bfd_mach_mips8000: 778 case bfd_mach_mips10000: 779 case bfd_mach_mips12000: 780 case bfd_mach_mips16: 781 case bfd_mach_mips32: 782 case bfd_mach_mips32_4k: 783 case bfd_mach_mips5: 784 case bfd_mach_mips64: 785 case bfd_mach_mips_sb1: 786 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ 787 arch_flags = M_MIPS2; 788 break; 789 default: 790 arch_flags = M_UNKNOWN; 791 break; 792 } 793 break; 794 795 case bfd_arch_ns32k: 796 switch (machine) { 797 case 0: arch_flags = M_NS32532; break; 798 case 32032: arch_flags = M_NS32032; break; 799 case 32532: arch_flags = M_NS32532; break; 800 default: arch_flags = M_UNKNOWN; break; 801 } 802 break; 803 804 case bfd_arch_vax: 805 *unknown = false; 806 break; 807 808 case bfd_arch_cris: 809 if (machine == 0 || machine == 255) arch_flags = M_CRIS; 810 break; 811 812 default: 813 arch_flags = M_UNKNOWN; 814 } 815 816 if (arch_flags != M_UNKNOWN) 817 *unknown = false; 818 819 return arch_flags; 820} 821 822/* 823FUNCTION 824 aout_@var{size}_set_arch_mach 825 826SYNOPSIS 827 boolean aout_@var{size}_set_arch_mach, 828 (bfd *, 829 enum bfd_architecture arch, 830 unsigned long machine)); 831 832DESCRIPTION 833 Set the architecture and the machine of the BFD @var{abfd} to the 834 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format 835 can support the architecture required. 836*/ 837 838boolean 839NAME(aout,set_arch_mach) (abfd, arch, machine) 840 bfd *abfd; 841 enum bfd_architecture arch; 842 unsigned long machine; 843{ 844 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 845 return false; 846 847 if (arch != bfd_arch_unknown) 848 { 849 boolean unknown; 850 851 NAME(aout,machine_type) (arch, machine, &unknown); 852 if (unknown) 853 return false; 854 } 855 856 /* Determine the size of a relocation entry */ 857 switch (arch) { 858 case bfd_arch_sparc: 859 case bfd_arch_a29k: 860 case bfd_arch_mips: 861 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; 862 break; 863 default: 864 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; 865 break; 866 } 867 868 return (*aout_backend_info(abfd)->set_sizes) (abfd); 869} 870 871static void 872adjust_o_magic (abfd, execp) 873 bfd *abfd; 874 struct internal_exec *execp; 875{ 876 file_ptr pos = adata (abfd).exec_bytes_size; 877 bfd_vma vma = 0; 878 int pad = 0; 879 880 /* Text. */ 881 obj_textsec(abfd)->filepos = pos; 882 if (!obj_textsec(abfd)->user_set_vma) 883 obj_textsec(abfd)->vma = vma; 884 else 885 vma = obj_textsec(abfd)->vma; 886 887 pos += obj_textsec(abfd)->_raw_size; 888 vma += obj_textsec(abfd)->_raw_size; 889 890 /* Data. */ 891 if (!obj_datasec(abfd)->user_set_vma) 892 { 893#if 0 /* ?? Does alignment in the file image really matter? */ 894 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma; 895#endif 896 obj_textsec(abfd)->_raw_size += pad; 897 pos += pad; 898 vma += pad; 899 obj_datasec(abfd)->vma = vma; 900 } 901 else 902 vma = obj_datasec(abfd)->vma; 903 obj_datasec(abfd)->filepos = pos; 904 pos += obj_datasec(abfd)->_raw_size; 905 vma += obj_datasec(abfd)->_raw_size; 906 907 /* BSS. */ 908 if (!obj_bsssec(abfd)->user_set_vma) 909 { 910#if 0 911 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; 912#endif 913 obj_datasec(abfd)->_raw_size += pad; 914 pos += pad; 915 vma += pad; 916 obj_bsssec(abfd)->vma = vma; 917 } 918 else 919 { 920 /* The VMA of the .bss section is set by the the VMA of the 921 .data section plus the size of the .data section. We may 922 need to add padding bytes to make this true. */ 923 pad = obj_bsssec (abfd)->vma - vma; 924 if (pad > 0) 925 { 926 obj_datasec (abfd)->_raw_size += pad; 927 pos += pad; 928 } 929 } 930 obj_bsssec(abfd)->filepos = pos; 931 932 /* Fix up the exec header. */ 933 execp->a_text = obj_textsec(abfd)->_raw_size; 934 execp->a_data = obj_datasec(abfd)->_raw_size; 935 execp->a_bss = obj_bsssec(abfd)->_raw_size; 936 N_SET_MAGIC (*execp, OMAGIC); 937} 938 939static void 940adjust_z_magic (abfd, execp) 941 bfd *abfd; 942 struct internal_exec *execp; 943{ 944 bfd_size_type data_pad, text_pad; 945 file_ptr text_end; 946 CONST struct aout_backend_data *abdp; 947 int ztih; /* Nonzero if text includes exec header. */ 948 949 abdp = aout_backend_info (abfd); 950 951 /* Text. */ 952 ztih = (abdp != NULL 953 && (abdp->text_includes_header 954 || obj_aout_subformat (abfd) == q_magic_format)); 955 obj_textsec(abfd)->filepos = (ztih 956 ? adata(abfd).exec_bytes_size 957 : adata(abfd).zmagic_disk_block_size); 958 if (! obj_textsec(abfd)->user_set_vma) 959 { 960 /* ?? Do we really need to check for relocs here? */ 961 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC) 962 ? 0 963 : (ztih 964 ? (abdp->default_text_vma 965 + adata(abfd).exec_bytes_size) 966 : abdp->default_text_vma)); 967 text_pad = 0; 968 } 969 else 970 { 971 /* The .text section is being loaded at an unusual address. We 972 may need to pad it such that the .data section starts at a page 973 boundary. */ 974 if (ztih) 975 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) 976 & (adata (abfd).page_size - 1)); 977 else 978 text_pad = ((- obj_textsec (abfd)->vma) 979 & (adata (abfd).page_size - 1)); 980 } 981 982 /* Find start of data. */ 983 if (ztih) 984 { 985 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size; 986 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 987 } 988 else 989 { 990 /* Note that if page_size == zmagic_disk_block_size, then 991 filepos == page_size, and this case is the same as the ztih 992 case. */ 993 text_end = obj_textsec (abfd)->_raw_size; 994 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; 995 text_end += obj_textsec (abfd)->filepos; 996 } 997 obj_textsec(abfd)->_raw_size += text_pad; 998 text_end += text_pad; 999 1000 /* Data. */ 1001 if (!obj_datasec(abfd)->user_set_vma) 1002 { 1003 bfd_vma vma; 1004 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size; 1005 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); 1006 } 1007 if (abdp && abdp->zmagic_mapped_contiguous) 1008 { 1009 text_pad = (obj_datasec(abfd)->vma 1010 - obj_textsec(abfd)->vma 1011 - obj_textsec(abfd)->_raw_size); 1012 obj_textsec(abfd)->_raw_size += text_pad; 1013 } 1014 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos 1015 + obj_textsec(abfd)->_raw_size); 1016 1017 /* Fix up exec header while we're at it. */ 1018 execp->a_text = obj_textsec(abfd)->_raw_size; 1019 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) 1020 execp->a_text += adata(abfd).exec_bytes_size; 1021 if (obj_aout_subformat (abfd) == q_magic_format) 1022 N_SET_MAGIC (*execp, QMAGIC); 1023 else 1024 N_SET_MAGIC (*execp, ZMAGIC); 1025 1026 /* Spec says data section should be rounded up to page boundary. */ 1027 obj_datasec(abfd)->_raw_size 1028 = align_power (obj_datasec(abfd)->_raw_size, 1029 obj_bsssec(abfd)->alignment_power); 1030 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size, 1031 adata(abfd).page_size); 1032 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size; 1033 1034 /* BSS. */ 1035 if (!obj_bsssec(abfd)->user_set_vma) 1036 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma 1037 + obj_datasec(abfd)->_raw_size); 1038 /* If the BSS immediately follows the data section and extra space 1039 in the page is left after the data section, fudge data 1040 in the header so that the bss section looks smaller by that 1041 amount. We'll start the bss section there, and lie to the OS. 1042 (Note that a linker script, as well as the above assignment, 1043 could have explicitly set the BSS vma to immediately follow 1044 the data section.) */ 1045 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power) 1046 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size) 1047 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 : 1048 obj_bsssec(abfd)->_raw_size - data_pad; 1049 else 1050 execp->a_bss = obj_bsssec(abfd)->_raw_size; 1051} 1052 1053static void 1054adjust_n_magic (abfd, execp) 1055 bfd *abfd; 1056 struct internal_exec *execp; 1057{ 1058 file_ptr pos = adata(abfd).exec_bytes_size; 1059 bfd_vma vma = 0; 1060 int pad; 1061 1062 /* Text. */ 1063 obj_textsec(abfd)->filepos = pos; 1064 if (!obj_textsec(abfd)->user_set_vma) 1065 obj_textsec(abfd)->vma = vma; 1066 else 1067 vma = obj_textsec(abfd)->vma; 1068 pos += obj_textsec(abfd)->_raw_size; 1069 vma += obj_textsec(abfd)->_raw_size; 1070 1071 /* Data. */ 1072 obj_datasec(abfd)->filepos = pos; 1073 if (!obj_datasec(abfd)->user_set_vma) 1074 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); 1075 vma = obj_datasec(abfd)->vma; 1076 1077 /* Since BSS follows data immediately, see if it needs alignment. */ 1078 vma += obj_datasec(abfd)->_raw_size; 1079 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; 1080 obj_datasec(abfd)->_raw_size += pad; 1081 pos += obj_datasec(abfd)->_raw_size; 1082 1083 /* BSS. */ 1084 if (!obj_bsssec(abfd)->user_set_vma) 1085 obj_bsssec(abfd)->vma = vma; 1086 else 1087 vma = obj_bsssec(abfd)->vma; 1088 1089 /* Fix up exec header. */ 1090 execp->a_text = obj_textsec(abfd)->_raw_size; 1091 execp->a_data = obj_datasec(abfd)->_raw_size; 1092 execp->a_bss = obj_bsssec(abfd)->_raw_size; 1093 N_SET_MAGIC (*execp, NMAGIC); 1094} 1095 1096boolean 1097NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end) 1098 bfd *abfd; 1099 bfd_size_type *text_size; 1100 file_ptr *text_end ATTRIBUTE_UNUSED; 1101{ 1102 struct internal_exec *execp = exec_hdr (abfd); 1103 1104 if (! NAME(aout,make_sections) (abfd)) 1105 return false; 1106 1107 if (adata(abfd).magic != undecided_magic) 1108 return true; 1109 1110 obj_textsec(abfd)->_raw_size = 1111 align_power(obj_textsec(abfd)->_raw_size, 1112 obj_textsec(abfd)->alignment_power); 1113 1114 *text_size = obj_textsec (abfd)->_raw_size; 1115 /* Rule (heuristic) for when to pad to a new page. Note that there 1116 are (at least) two ways demand-paged (ZMAGIC) files have been 1117 handled. Most Berkeley-based systems start the text segment at 1118 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text 1119 segment right after the exec header; the latter is counted in the 1120 text segment size, and is paged in by the kernel with the rest of 1121 the text. */ 1122 1123 /* This perhaps isn't the right way to do this, but made it simpler for me 1124 to understand enough to implement it. Better would probably be to go 1125 right from BFD flags to alignment/positioning characteristics. But the 1126 old code was sloppy enough about handling the flags, and had enough 1127 other magic, that it was a little hard for me to understand. I think 1128 I understand it better now, but I haven't time to do the cleanup this 1129 minute. */ 1130 1131 if (abfd->flags & D_PAGED) 1132 /* Whether or not WP_TEXT is set -- let D_PAGED override. */ 1133 adata(abfd).magic = z_magic; 1134 else if (abfd->flags & WP_TEXT) 1135 adata(abfd).magic = n_magic; 1136 else 1137 adata(abfd).magic = o_magic; 1138 1139#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ 1140#if __GNUC__ >= 2 1141 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", 1142 ({ char *str; 1143 switch (adata(abfd).magic) { 1144 case n_magic: str = "NMAGIC"; break; 1145 case o_magic: str = "OMAGIC"; break; 1146 case z_magic: str = "ZMAGIC"; break; 1147 default: abort (); 1148 } 1149 str; 1150 }), 1151 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, 1152 obj_textsec(abfd)->alignment_power, 1153 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, 1154 obj_datasec(abfd)->alignment_power, 1155 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size, 1156 obj_bsssec(abfd)->alignment_power); 1157#endif 1158#endif 1159 1160 switch (adata(abfd).magic) 1161 { 1162 case o_magic: 1163 adjust_o_magic (abfd, execp); 1164 break; 1165 case z_magic: 1166 adjust_z_magic (abfd, execp); 1167 break; 1168 case n_magic: 1169 adjust_n_magic (abfd, execp); 1170 break; 1171 default: 1172 abort (); 1173 } 1174 1175#ifdef BFD_AOUT_DEBUG 1176 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", 1177 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, 1178 obj_textsec(abfd)->filepos, 1179 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, 1180 obj_datasec(abfd)->filepos, 1181 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size); 1182#endif 1183 1184 return true; 1185} 1186 1187/* 1188FUNCTION 1189 aout_@var{size}_new_section_hook 1190 1191SYNOPSIS 1192 boolean aout_@var{size}_new_section_hook, 1193 (bfd *abfd, 1194 asection *newsect)); 1195 1196DESCRIPTION 1197 Called by the BFD in response to a @code{bfd_make_section} 1198 request. 1199*/ 1200boolean 1201NAME(aout,new_section_hook) (abfd, newsect) 1202 bfd *abfd; 1203 asection *newsect; 1204{ 1205 /* align to double at least */ 1206 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; 1207 1208 if (bfd_get_format (abfd) == bfd_object) 1209 { 1210 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) { 1211 obj_textsec(abfd)= newsect; 1212 newsect->target_index = N_TEXT; 1213 return true; 1214 } 1215 1216 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) { 1217 obj_datasec(abfd) = newsect; 1218 newsect->target_index = N_DATA; 1219 return true; 1220 } 1221 1222 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) { 1223 obj_bsssec(abfd) = newsect; 1224 newsect->target_index = N_BSS; 1225 return true; 1226 } 1227 1228 } 1229 1230 /* We allow more than three sections internally */ 1231 return true; 1232} 1233 1234boolean 1235NAME(aout,set_section_contents) (abfd, section, location, offset, count) 1236 bfd *abfd; 1237 sec_ptr section; 1238 PTR location; 1239 file_ptr offset; 1240 bfd_size_type count; 1241{ 1242 file_ptr text_end; 1243 bfd_size_type text_size; 1244 1245 if (! abfd->output_has_begun) 1246 { 1247 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 1248 return false; 1249 } 1250 1251 if (section == obj_bsssec (abfd)) 1252 { 1253 bfd_set_error (bfd_error_no_contents); 1254 return false; 1255 } 1256 1257 if (section != obj_textsec (abfd) 1258 && section != obj_datasec (abfd)) 1259 { 1260 (*_bfd_error_handler) 1261 (_("%s: can not represent section `%s' in a.out object file format"), 1262 bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); 1263 bfd_set_error (bfd_error_nonrepresentable_section); 1264 return false; 1265 } 1266 1267 if (count != 0) 1268 { 1269 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 1270 || bfd_write (location, 1, count, abfd) != count) 1271 return false; 1272 } 1273 1274 return true; 1275} 1276 1277/* Read the external symbols from an a.out file. */ 1278 1279static boolean 1280aout_get_external_symbols (abfd) 1281 bfd *abfd; 1282{ 1283 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL) 1284 { 1285 bfd_size_type count; 1286 struct external_nlist *syms; 1287 1288 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; 1289 1290#ifdef USE_MMAP 1291 if (bfd_get_file_window (abfd, 1292 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms, 1293 &obj_aout_sym_window (abfd), true) == false) 1294 return false; 1295 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; 1296#else 1297 /* We allocate using malloc to make the values easy to free 1298 later on. If we put them on the objalloc it might not be 1299 possible to free them. */ 1300 syms = ((struct external_nlist *) 1301 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE)); 1302 if (syms == (struct external_nlist *) NULL && count != 0) 1303 return false; 1304 1305 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 1306 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd) 1307 != exec_hdr (abfd)->a_syms)) 1308 { 1309 free (syms); 1310 return false; 1311 } 1312#endif 1313 1314 obj_aout_external_syms (abfd) = syms; 1315 obj_aout_external_sym_count (abfd) = count; 1316 } 1317 1318 if (obj_aout_external_strings (abfd) == NULL 1319 && exec_hdr (abfd)->a_syms != 0) 1320 { 1321 unsigned char string_chars[BYTES_IN_WORD]; 1322 bfd_size_type stringsize; 1323 char *strings; 1324 1325 /* Get the size of the strings. */ 1326 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 1327 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd) 1328 != BYTES_IN_WORD)) 1329 return false; 1330 stringsize = GET_WORD (abfd, string_chars); 1331 1332#ifdef USE_MMAP 1333 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, 1334 &obj_aout_string_window (abfd), true) == false) 1335 return false; 1336 strings = (char *) obj_aout_string_window (abfd).data; 1337#else 1338 strings = (char *) bfd_malloc ((size_t) stringsize + 1); 1339 if (strings == NULL) 1340 return false; 1341 1342 /* Skip space for the string count in the buffer for convenience 1343 when using indexes. */ 1344 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD, 1345 abfd) 1346 != stringsize - BYTES_IN_WORD) 1347 { 1348 free (strings); 1349 return false; 1350 } 1351#endif 1352 1353 /* Ensure that a zero index yields an empty string. */ 1354 strings[0] = '\0'; 1355 1356 strings[stringsize - 1] = 0; 1357 1358 obj_aout_external_strings (abfd) = strings; 1359 obj_aout_external_string_size (abfd) = stringsize; 1360 } 1361 1362 return true; 1363} 1364 1365/* Translate an a.out symbol into a BFD symbol. The desc, other, type 1366 and symbol->value fields of CACHE_PTR will be set from the a.out 1367 nlist structure. This function is responsible for setting 1368 symbol->flags and symbol->section, and adjusting symbol->value. */ 1369 1370static boolean 1371translate_from_native_sym_flags (abfd, cache_ptr) 1372 bfd *abfd; 1373 aout_symbol_type *cache_ptr; 1374{ 1375 flagword visible; 1376 1377 if ((cache_ptr->type & N_STAB) != 0 1378 || cache_ptr->type == N_FN) 1379 { 1380 asection *sec; 1381 1382 /* This is a debugging symbol. */ 1383 1384 cache_ptr->symbol.flags = BSF_DEBUGGING; 1385 1386 /* Work out the symbol section. */ 1387 switch (cache_ptr->type & N_TYPE) 1388 { 1389 case N_TEXT: 1390 case N_FN: 1391 sec = obj_textsec (abfd); 1392 break; 1393 case N_DATA: 1394 sec = obj_datasec (abfd); 1395 break; 1396 case N_BSS: 1397 sec = obj_bsssec (abfd); 1398 break; 1399 default: 1400 case N_ABS: 1401 sec = bfd_abs_section_ptr; 1402 break; 1403 } 1404 1405 cache_ptr->symbol.section = sec; 1406 cache_ptr->symbol.value -= sec->vma; 1407 1408 return true; 1409 } 1410 1411 /* Get the default visibility. This does not apply to all types, so 1412 we just hold it in a local variable to use if wanted. */ 1413 if ((cache_ptr->type & N_EXT) == 0) 1414 visible = BSF_LOCAL; 1415 else 1416 visible = BSF_GLOBAL; 1417 1418 switch (cache_ptr->type) 1419 { 1420 default: 1421 case N_ABS: case N_ABS | N_EXT: 1422 cache_ptr->symbol.section = bfd_abs_section_ptr; 1423 cache_ptr->symbol.flags = visible; 1424 break; 1425 1426 case N_UNDF | N_EXT: 1427 if (cache_ptr->symbol.value != 0) 1428 { 1429 /* This is a common symbol. */ 1430 cache_ptr->symbol.flags = BSF_GLOBAL; 1431 cache_ptr->symbol.section = bfd_com_section_ptr; 1432 } 1433 else 1434 { 1435 cache_ptr->symbol.flags = 0; 1436 cache_ptr->symbol.section = bfd_und_section_ptr; 1437 } 1438 break; 1439 1440 case N_TEXT: case N_TEXT | N_EXT: 1441 cache_ptr->symbol.section = obj_textsec (abfd); 1442 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1443 cache_ptr->symbol.flags = visible; 1444 break; 1445 1446 /* N_SETV symbols used to represent set vectors placed in the 1447 data section. They are no longer generated. Theoretically, 1448 it was possible to extract the entries and combine them with 1449 new ones, although I don't know if that was ever actually 1450 done. Unless that feature is restored, treat them as data 1451 symbols. */ 1452 case N_SETV: case N_SETV | N_EXT: 1453 case N_DATA: case N_DATA | N_EXT: 1454 cache_ptr->symbol.section = obj_datasec (abfd); 1455 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1456 cache_ptr->symbol.flags = visible; 1457 break; 1458 1459 case N_BSS: case N_BSS | N_EXT: 1460 cache_ptr->symbol.section = obj_bsssec (abfd); 1461 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1462 cache_ptr->symbol.flags = visible; 1463 break; 1464 1465 case N_SETA: case N_SETA | N_EXT: 1466 case N_SETT: case N_SETT | N_EXT: 1467 case N_SETD: case N_SETD | N_EXT: 1468 case N_SETB: case N_SETB | N_EXT: 1469 { 1470 /* This code is no longer needed. It used to be used to make 1471 the linker handle set symbols, but they are now handled in 1472 the add_symbols routine instead. */ 1473#if 0 1474 asection *section; 1475 arelent_chain *reloc; 1476 asection *into_section; 1477 1478 /* This is a set symbol. The name of the symbol is the name 1479 of the set (e.g., __CTOR_LIST__). The value of the symbol 1480 is the value to add to the set. We create a section with 1481 the same name as the symbol, and add a reloc to insert the 1482 appropriate value into the section. 1483 1484 This action is actually obsolete; it used to make the 1485 linker do the right thing, but the linker no longer uses 1486 this function. */ 1487 1488 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name); 1489 if (section == NULL) 1490 { 1491 char *copy; 1492 1493 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1); 1494 if (copy == NULL) 1495 return false; 1496 1497 strcpy (copy, cache_ptr->symbol.name); 1498 section = bfd_make_section (abfd, copy); 1499 if (section == NULL) 1500 return false; 1501 } 1502 1503 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain)); 1504 if (reloc == NULL) 1505 return false; 1506 1507 /* Build a relocation entry for the constructor. */ 1508 switch (cache_ptr->type & N_TYPE) 1509 { 1510 case N_SETA: 1511 into_section = bfd_abs_section_ptr; 1512 cache_ptr->type = N_ABS; 1513 break; 1514 case N_SETT: 1515 into_section = obj_textsec (abfd); 1516 cache_ptr->type = N_TEXT; 1517 break; 1518 case N_SETD: 1519 into_section = obj_datasec (abfd); 1520 cache_ptr->type = N_DATA; 1521 break; 1522 case N_SETB: 1523 into_section = obj_bsssec (abfd); 1524 cache_ptr->type = N_BSS; 1525 break; 1526 } 1527 1528 /* Build a relocation pointing into the constructor section 1529 pointing at the symbol in the set vector specified. */ 1530 reloc->relent.addend = cache_ptr->symbol.value; 1531 cache_ptr->symbol.section = into_section; 1532 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr; 1533 1534 /* We modify the symbol to belong to a section depending upon 1535 the name of the symbol, and add to the size of the section 1536 to contain a pointer to the symbol. Build a reloc entry to 1537 relocate to this symbol attached to this section. */ 1538 section->flags = SEC_CONSTRUCTOR | SEC_RELOC; 1539 1540 section->reloc_count++; 1541 section->alignment_power = 2; 1542 1543 reloc->next = section->constructor_chain; 1544 section->constructor_chain = reloc; 1545 reloc->relent.address = section->_raw_size; 1546 section->_raw_size += BYTES_IN_WORD; 1547 1548 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd); 1549 1550#endif /* 0 */ 1551 1552 switch (cache_ptr->type & N_TYPE) 1553 { 1554 case N_SETA: 1555 cache_ptr->symbol.section = bfd_abs_section_ptr; 1556 break; 1557 case N_SETT: 1558 cache_ptr->symbol.section = obj_textsec (abfd); 1559 break; 1560 case N_SETD: 1561 cache_ptr->symbol.section = obj_datasec (abfd); 1562 break; 1563 case N_SETB: 1564 cache_ptr->symbol.section = obj_bsssec (abfd); 1565 break; 1566 } 1567 1568 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; 1569 } 1570 break; 1571 1572 case N_WARNING: 1573 /* This symbol is the text of a warning message. The next 1574 symbol is the symbol to associate the warning with. If a 1575 reference is made to that symbol, a warning is issued. */ 1576 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; 1577 cache_ptr->symbol.section = bfd_abs_section_ptr; 1578 break; 1579 1580 case N_INDR: case N_INDR | N_EXT: 1581 /* An indirect symbol. This consists of two symbols in a row. 1582 The first symbol is the name of the indirection. The second 1583 symbol is the name of the target. A reference to the first 1584 symbol becomes a reference to the second. */ 1585 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; 1586 cache_ptr->symbol.section = bfd_ind_section_ptr; 1587 break; 1588 1589 case N_WEAKU: 1590 cache_ptr->symbol.section = bfd_und_section_ptr; 1591 cache_ptr->symbol.flags = BSF_WEAK; 1592 break; 1593 1594 case N_WEAKA: 1595 cache_ptr->symbol.section = bfd_abs_section_ptr; 1596 cache_ptr->symbol.flags = BSF_WEAK; 1597 break; 1598 1599 case N_WEAKT: 1600 cache_ptr->symbol.section = obj_textsec (abfd); 1601 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1602 cache_ptr->symbol.flags = BSF_WEAK; 1603 break; 1604 1605 case N_WEAKD: 1606 cache_ptr->symbol.section = obj_datasec (abfd); 1607 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1608 cache_ptr->symbol.flags = BSF_WEAK; 1609 break; 1610 1611 case N_WEAKB: 1612 cache_ptr->symbol.section = obj_bsssec (abfd); 1613 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; 1614 cache_ptr->symbol.flags = BSF_WEAK; 1615 break; 1616 } 1617 1618 return true; 1619} 1620 1621/* Set the fields of SYM_POINTER according to CACHE_PTR. */ 1622 1623static boolean 1624translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer) 1625 bfd *abfd; 1626 asymbol *cache_ptr; 1627 struct external_nlist *sym_pointer; 1628{ 1629 bfd_vma value = cache_ptr->value; 1630 asection *sec; 1631 bfd_vma off; 1632 1633 /* Mask out any existing type bits in case copying from one section 1634 to another. */ 1635 sym_pointer->e_type[0] &= ~N_TYPE; 1636 1637 sec = bfd_get_section (cache_ptr); 1638 off = 0; 1639 1640 if (sec == NULL) 1641 { 1642 /* This case occurs, e.g., for the *DEBUG* section of a COFF 1643 file. */ 1644 (*_bfd_error_handler) 1645 (_("%s: can not represent section for symbol `%s' in a.out object file format"), 1646 bfd_get_filename (abfd), 1647 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); 1648 bfd_set_error (bfd_error_nonrepresentable_section); 1649 return false; 1650 } 1651 1652 if (sec->output_section != NULL) 1653 { 1654 off = sec->output_offset; 1655 sec = sec->output_section; 1656 } 1657 1658 if (bfd_is_abs_section (sec)) 1659 sym_pointer->e_type[0] |= N_ABS; 1660 else if (sec == obj_textsec (abfd)) 1661 sym_pointer->e_type[0] |= N_TEXT; 1662 else if (sec == obj_datasec (abfd)) 1663 sym_pointer->e_type[0] |= N_DATA; 1664 else if (sec == obj_bsssec (abfd)) 1665 sym_pointer->e_type[0] |= N_BSS; 1666 else if (bfd_is_und_section (sec)) 1667 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1668 else if (bfd_is_ind_section (sec)) 1669 sym_pointer->e_type[0] = N_INDR; 1670 else if (bfd_is_com_section (sec)) 1671 sym_pointer->e_type[0] = N_UNDF | N_EXT; 1672 else 1673 { 1674 (*_bfd_error_handler) 1675 (_("%s: can not represent section `%s' in a.out object file format"), 1676 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); 1677 bfd_set_error (bfd_error_nonrepresentable_section); 1678 return false; 1679 } 1680 1681 /* Turn the symbol from section relative to absolute again */ 1682 value += sec->vma + off; 1683 1684 if ((cache_ptr->flags & BSF_WARNING) != 0) 1685 sym_pointer->e_type[0] = N_WARNING; 1686 1687 if ((cache_ptr->flags & BSF_DEBUGGING) != 0) 1688 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; 1689 else if ((cache_ptr->flags & BSF_GLOBAL) != 0) 1690 sym_pointer->e_type[0] |= N_EXT; 1691 else if ((cache_ptr->flags & BSF_LOCAL) != 0) 1692 sym_pointer->e_type[0] &= ~N_EXT; 1693 1694 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) 1695 { 1696 int type = ((aout_symbol_type *) cache_ptr)->type; 1697 switch (type) 1698 { 1699 case N_ABS: type = N_SETA; break; 1700 case N_TEXT: type = N_SETT; break; 1701 case N_DATA: type = N_SETD; break; 1702 case N_BSS: type = N_SETB; break; 1703 } 1704 sym_pointer->e_type[0] = type; 1705 } 1706 1707 if ((cache_ptr->flags & BSF_WEAK) != 0) 1708 { 1709 int type; 1710 1711 switch (sym_pointer->e_type[0] & N_TYPE) 1712 { 1713 default: 1714 case N_ABS: type = N_WEAKA; break; 1715 case N_TEXT: type = N_WEAKT; break; 1716 case N_DATA: type = N_WEAKD; break; 1717 case N_BSS: type = N_WEAKB; break; 1718 case N_UNDF: type = N_WEAKU; break; 1719 } 1720 sym_pointer->e_type[0] = type; 1721 } 1722 1723 PUT_WORD(abfd, value, sym_pointer->e_value); 1724 1725 return true; 1726} 1727 1728/* Native-level interface to symbols. */ 1729 1730asymbol * 1731NAME(aout,make_empty_symbol) (abfd) 1732 bfd *abfd; 1733{ 1734 aout_symbol_type *new = 1735 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type)); 1736 if (!new) 1737 return NULL; 1738 new->symbol.the_bfd = abfd; 1739 1740 return &new->symbol; 1741} 1742 1743/* Translate a set of internal symbols into external symbols. */ 1744 1745boolean 1746NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic) 1747 bfd *abfd; 1748 aout_symbol_type *in; 1749 struct external_nlist *ext; 1750 bfd_size_type count; 1751 char *str; 1752 bfd_size_type strsize; 1753 boolean dynamic; 1754{ 1755 struct external_nlist *ext_end; 1756 1757 ext_end = ext + count; 1758 for (; ext < ext_end; ext++, in++) 1759 { 1760 bfd_vma x; 1761 1762 x = GET_WORD (abfd, ext->e_strx); 1763 in->symbol.the_bfd = abfd; 1764 1765 /* For the normal symbols, the zero index points at the number 1766 of bytes in the string table but is to be interpreted as the 1767 null string. For the dynamic symbols, the number of bytes in 1768 the string table is stored in the __DYNAMIC structure and the 1769 zero index points at an actual string. */ 1770 if (x == 0 && ! dynamic) 1771 in->symbol.name = ""; 1772 else if (x < strsize) 1773 in->symbol.name = str + x; 1774 else 1775 return false; 1776 1777 in->symbol.value = GET_SWORD (abfd, ext->e_value); 1778 in->desc = bfd_h_get_16 (abfd, ext->e_desc); 1779 in->other = bfd_h_get_8 (abfd, ext->e_other); 1780 in->type = bfd_h_get_8 (abfd, ext->e_type); 1781 in->symbol.udata.p = NULL; 1782 1783 if (! translate_from_native_sym_flags (abfd, in)) 1784 return false; 1785 1786 if (dynamic) 1787 in->symbol.flags |= BSF_DYNAMIC; 1788 } 1789 1790 return true; 1791} 1792 1793/* We read the symbols into a buffer, which is discarded when this 1794 function exits. We read the strings into a buffer large enough to 1795 hold them all plus all the cached symbol entries. */ 1796 1797boolean 1798NAME(aout,slurp_symbol_table) (abfd) 1799 bfd *abfd; 1800{ 1801 struct external_nlist *old_external_syms; 1802 aout_symbol_type *cached; 1803 size_t cached_size; 1804 1805 /* If there's no work to be done, don't do any */ 1806 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) 1807 return true; 1808 1809 old_external_syms = obj_aout_external_syms (abfd); 1810 1811 if (! aout_get_external_symbols (abfd)) 1812 return false; 1813 1814 cached_size = (obj_aout_external_sym_count (abfd) 1815 * sizeof (aout_symbol_type)); 1816 cached = (aout_symbol_type *) bfd_malloc (cached_size); 1817 if (cached == NULL && cached_size != 0) 1818 return false; 1819 if (cached_size != 0) 1820 memset (cached, 0, cached_size); 1821 1822 /* Convert from external symbol information to internal. */ 1823 if (! (NAME(aout,translate_symbol_table) 1824 (abfd, cached, 1825 obj_aout_external_syms (abfd), 1826 obj_aout_external_sym_count (abfd), 1827 obj_aout_external_strings (abfd), 1828 obj_aout_external_string_size (abfd), 1829 false))) 1830 { 1831 free (cached); 1832 return false; 1833 } 1834 1835 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); 1836 1837 obj_aout_symbols (abfd) = cached; 1838 1839 /* It is very likely that anybody who calls this function will not 1840 want the external symbol information, so if it was allocated 1841 because of our call to aout_get_external_symbols, we free it up 1842 right away to save space. */ 1843 if (old_external_syms == (struct external_nlist *) NULL 1844 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) 1845 { 1846#ifdef USE_MMAP 1847 bfd_free_window (&obj_aout_sym_window (abfd)); 1848#else 1849 free (obj_aout_external_syms (abfd)); 1850#endif 1851 obj_aout_external_syms (abfd) = NULL; 1852 } 1853 1854 return true; 1855} 1856 1857/* We use a hash table when writing out symbols so that we only write 1858 out a particular string once. This helps particularly when the 1859 linker writes out stabs debugging entries, because each different 1860 contributing object file tends to have many duplicate stabs 1861 strings. 1862 1863 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it 1864 if BFD_TRADITIONAL_FORMAT is set. */ 1865 1866static bfd_size_type add_to_stringtab 1867 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean)); 1868static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *)); 1869 1870/* Get the index of a string in a strtab, adding it if it is not 1871 already present. */ 1872 1873static INLINE bfd_size_type 1874add_to_stringtab (abfd, tab, str, copy) 1875 bfd *abfd; 1876 struct bfd_strtab_hash *tab; 1877 const char *str; 1878 boolean copy; 1879{ 1880 boolean hash; 1881 bfd_size_type index; 1882 1883 /* An index of 0 always means the empty string. */ 1884 if (str == 0 || *str == '\0') 1885 return 0; 1886 1887 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx 1888 doesn't understand a hashed string table. */ 1889 hash = true; 1890 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) 1891 hash = false; 1892 1893 index = _bfd_stringtab_add (tab, str, hash, copy); 1894 1895 if (index != (bfd_size_type) -1) 1896 { 1897 /* Add BYTES_IN_WORD to the return value to account for the 1898 space taken up by the string table size. */ 1899 index += BYTES_IN_WORD; 1900 } 1901 1902 return index; 1903} 1904 1905/* Write out a strtab. ABFD is already at the right location in the 1906 file. */ 1907 1908static boolean 1909emit_stringtab (abfd, tab) 1910 register bfd *abfd; 1911 struct bfd_strtab_hash *tab; 1912{ 1913 bfd_byte buffer[BYTES_IN_WORD]; 1914 1915 /* The string table starts with the size. */ 1916 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); 1917 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD) 1918 return false; 1919 1920 return _bfd_stringtab_emit (abfd, tab); 1921} 1922 1923boolean 1924NAME(aout,write_syms) (abfd) 1925 bfd *abfd; 1926{ 1927 unsigned int count ; 1928 asymbol **generic = bfd_get_outsymbols (abfd); 1929 struct bfd_strtab_hash *strtab; 1930 1931 strtab = _bfd_stringtab_init (); 1932 if (strtab == NULL) 1933 return false; 1934 1935 for (count = 0; count < bfd_get_symcount (abfd); count++) 1936 { 1937 asymbol *g = generic[count]; 1938 bfd_size_type indx; 1939 struct external_nlist nsp; 1940 1941 indx = add_to_stringtab (abfd, strtab, g->name, false); 1942 if (indx == (bfd_size_type) -1) 1943 goto error_return; 1944 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); 1945 1946 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) 1947 { 1948 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc); 1949 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other); 1950 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type); 1951 } 1952 else 1953 { 1954 bfd_h_put_16(abfd,0, nsp.e_desc); 1955 bfd_h_put_8(abfd, 0, nsp.e_other); 1956 bfd_h_put_8(abfd, 0, nsp.e_type); 1957 } 1958 1959 if (! translate_to_native_sym_flags (abfd, g, &nsp)) 1960 goto error_return; 1961 1962 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd) 1963 != EXTERNAL_NLIST_SIZE) 1964 goto error_return; 1965 1966 /* NB: `KEEPIT' currently overlays `udata.p', so set this only 1967 here, at the end. */ 1968 g->KEEPIT = count; 1969 } 1970 1971 if (! emit_stringtab (abfd, strtab)) 1972 goto error_return; 1973 1974 _bfd_stringtab_free (strtab); 1975 1976 return true; 1977 1978error_return: 1979 _bfd_stringtab_free (strtab); 1980 return false; 1981} 1982 1983long 1984NAME(aout,get_symtab) (abfd, location) 1985 bfd *abfd; 1986 asymbol **location; 1987{ 1988 unsigned int counter = 0; 1989 aout_symbol_type *symbase; 1990 1991 if (!NAME(aout,slurp_symbol_table) (abfd)) 1992 return -1; 1993 1994 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);) 1995 *(location++) = (asymbol *) ( symbase++); 1996 *location++ =0; 1997 return bfd_get_symcount (abfd); 1998} 1999 2000/* Standard reloc stuff */ 2001/* Output standard relocation information to a file in target byte order. */ 2002 2003extern void NAME(aout,swap_std_reloc_out) 2004 PARAMS ((bfd *, arelent *, struct reloc_std_external *)); 2005 2006void 2007NAME(aout,swap_std_reloc_out) (abfd, g, natptr) 2008 bfd *abfd; 2009 arelent *g; 2010 struct reloc_std_external *natptr; 2011{ 2012 int r_index; 2013 asymbol *sym = *(g->sym_ptr_ptr); 2014 int r_extern; 2015 unsigned int r_length; 2016 int r_pcrel; 2017 int r_baserel, r_jmptable, r_relative; 2018 asection *output_section = sym->section->output_section; 2019 2020 PUT_WORD(abfd, g->address, natptr->r_address); 2021 2022 r_length = g->howto->size ; /* Size as a power of two */ 2023 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ 2024 /* XXX This relies on relocs coming from a.out files. */ 2025 r_baserel = (g->howto->type & 8) != 0; 2026 r_jmptable = (g->howto->type & 16) != 0; 2027 r_relative = (g->howto->type & 32) != 0; 2028 2029#if 0 2030 /* For a standard reloc, the addend is in the object file. */ 2031 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; 2032#endif 2033 2034 /* name was clobbered by aout_write_syms to be symbol index */ 2035 2036 /* If this relocation is relative to a symbol then set the 2037 r_index to the symbols index, and the r_extern bit. 2038 2039 Absolute symbols can come in in two ways, either as an offset 2040 from the abs section, or as a symbol which has an abs value. 2041 check for that here 2042 */ 2043 2044 if (bfd_is_com_section (output_section) 2045 || bfd_is_abs_section (output_section) 2046 || bfd_is_und_section (output_section)) 2047 { 2048 if (bfd_abs_section_ptr->symbol == sym) 2049 { 2050 /* Whoops, looked like an abs symbol, but is really an offset 2051 from the abs section */ 2052 r_index = N_ABS; 2053 r_extern = 0; 2054 } 2055 else 2056 { 2057 /* Fill in symbol */ 2058 r_extern = 1; 2059 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2060 2061 } 2062 } 2063 else 2064 { 2065 /* Just an ordinary section */ 2066 r_extern = 0; 2067 r_index = output_section->target_index; 2068 } 2069 2070 /* now the fun stuff */ 2071 if (bfd_header_big_endian (abfd)) { 2072 natptr->r_index[0] = r_index >> 16; 2073 natptr->r_index[1] = r_index >> 8; 2074 natptr->r_index[2] = r_index; 2075 natptr->r_type[0] = 2076 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0) 2077 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0) 2078 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0) 2079 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0) 2080 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0) 2081 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG); 2082 } else { 2083 natptr->r_index[2] = r_index >> 16; 2084 natptr->r_index[1] = r_index >> 8; 2085 natptr->r_index[0] = r_index; 2086 natptr->r_type[0] = 2087 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) 2088 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) 2089 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0) 2090 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0) 2091 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0) 2092 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE); 2093 } 2094} 2095 2096/* Extended stuff */ 2097/* Output extended relocation information to a file in target byte order. */ 2098 2099extern void NAME(aout,swap_ext_reloc_out) 2100 PARAMS ((bfd *, arelent *, struct reloc_ext_external *)); 2101 2102void 2103NAME(aout,swap_ext_reloc_out) (abfd, g, natptr) 2104 bfd *abfd; 2105 arelent *g; 2106 register struct reloc_ext_external *natptr; 2107{ 2108 int r_index; 2109 int r_extern; 2110 unsigned int r_type; 2111 unsigned int r_addend; 2112 asymbol *sym = *(g->sym_ptr_ptr); 2113 asection *output_section = sym->section->output_section; 2114 2115 PUT_WORD (abfd, g->address, natptr->r_address); 2116 2117 r_type = (unsigned int) g->howto->type; 2118 2119 r_addend = g->addend; 2120 if ((sym->flags & BSF_SECTION_SYM) != 0) 2121 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; 2122 2123 /* If this relocation is relative to a symbol then set the 2124 r_index to the symbols index, and the r_extern bit. 2125 2126 Absolute symbols can come in in two ways, either as an offset 2127 from the abs section, or as a symbol which has an abs value. 2128 check for that here. */ 2129 2130 if (bfd_is_abs_section (bfd_get_section (sym))) 2131 { 2132 r_extern = 0; 2133 r_index = N_ABS; 2134 } 2135 else if ((sym->flags & BSF_SECTION_SYM) == 0) 2136 { 2137 if (bfd_is_und_section (bfd_get_section (sym)) 2138 || (sym->flags & BSF_GLOBAL) != 0) 2139 r_extern = 1; 2140 else 2141 r_extern = 0; 2142 r_index = (*(g->sym_ptr_ptr))->KEEPIT; 2143 } 2144 else 2145 { 2146 /* Just an ordinary section */ 2147 r_extern = 0; 2148 r_index = output_section->target_index; 2149 } 2150 2151 /* now the fun stuff */ 2152 if (bfd_header_big_endian (abfd)) { 2153 natptr->r_index[0] = r_index >> 16; 2154 natptr->r_index[1] = r_index >> 8; 2155 natptr->r_index[2] = r_index; 2156 natptr->r_type[0] = 2157 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0) 2158 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); 2159 } else { 2160 natptr->r_index[2] = r_index >> 16; 2161 natptr->r_index[1] = r_index >> 8; 2162 natptr->r_index[0] = r_index; 2163 natptr->r_type[0] = 2164 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0) 2165 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 2166 } 2167 2168 PUT_WORD (abfd, r_addend, natptr->r_addend); 2169} 2170 2171/* BFD deals internally with all things based from the section they're 2172 in. so, something in 10 bytes into a text section with a base of 2173 50 would have a symbol (.text+10) and know .text vma was 50. 2174 2175 Aout keeps all it's symbols based from zero, so the symbol would 2176 contain 60. This macro subs the base of each section from the value 2177 to give the true offset from the section */ 2178 2179#define MOVE_ADDRESS(ad) \ 2180 if (r_extern) { \ 2181 /* undefined symbol */ \ 2182 cache_ptr->sym_ptr_ptr = symbols + r_index; \ 2183 cache_ptr->addend = ad; \ 2184 } else { \ 2185 /* defined, section relative. replace symbol with pointer to \ 2186 symbol which points to section */ \ 2187 switch (r_index) { \ 2188 case N_TEXT: \ 2189 case N_TEXT | N_EXT: \ 2190 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \ 2191 cache_ptr->addend = ad - su->textsec->vma; \ 2192 break; \ 2193 case N_DATA: \ 2194 case N_DATA | N_EXT: \ 2195 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \ 2196 cache_ptr->addend = ad - su->datasec->vma; \ 2197 break; \ 2198 case N_BSS: \ 2199 case N_BSS | N_EXT: \ 2200 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \ 2201 cache_ptr->addend = ad - su->bsssec->vma; \ 2202 break; \ 2203 default: \ 2204 case N_ABS: \ 2205 case N_ABS | N_EXT: \ 2206 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ 2207 cache_ptr->addend = ad; \ 2208 break; \ 2209 } \ 2210 } \ 2211 2212void 2213NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) 2214 bfd *abfd; 2215 struct reloc_ext_external *bytes; 2216 arelent *cache_ptr; 2217 asymbol **symbols; 2218 bfd_size_type symcount; 2219{ 2220 unsigned int r_index; 2221 int r_extern; 2222 unsigned int r_type; 2223 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2224 2225 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); 2226 2227 /* now the fun stuff */ 2228 if (bfd_header_big_endian (abfd)) { 2229 r_index = (bytes->r_index[0] << 16) 2230 | (bytes->r_index[1] << 8) 2231 | bytes->r_index[2]; 2232 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 2233 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2234 >> RELOC_EXT_BITS_TYPE_SH_BIG; 2235 } else { 2236 r_index = (bytes->r_index[2] << 16) 2237 | (bytes->r_index[1] << 8) 2238 | bytes->r_index[0]; 2239 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 2240 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2241 >> RELOC_EXT_BITS_TYPE_SH_LITTLE; 2242 } 2243 2244 cache_ptr->howto = howto_table_ext + r_type; 2245 2246 /* Base relative relocs are always against the symbol table, 2247 regardless of the setting of r_extern. r_extern just reflects 2248 whether the symbol the reloc is against is local or global. */ 2249 if (r_type == RELOC_BASE10 2250 || r_type == RELOC_BASE13 2251 || r_type == RELOC_BASE22) 2252 r_extern = 1; 2253 2254 if (r_extern && r_index > symcount) 2255 { 2256 /* We could arrange to return an error, but it might be useful 2257 to see the file even if it is bad. */ 2258 r_extern = 0; 2259 r_index = N_ABS; 2260 } 2261 2262 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend)); 2263} 2264 2265void 2266NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) 2267 bfd *abfd; 2268 struct reloc_std_external *bytes; 2269 arelent *cache_ptr; 2270 asymbol **symbols; 2271 bfd_size_type symcount; 2272{ 2273 unsigned int r_index; 2274 int r_extern; 2275 unsigned int r_length; 2276 int r_pcrel; 2277 int r_baserel, r_jmptable, r_relative; 2278 struct aoutdata *su = &(abfd->tdata.aout_data->a); 2279 unsigned int howto_idx; 2280 2281 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address); 2282 2283 /* now the fun stuff */ 2284 if (bfd_header_big_endian (abfd)) { 2285 r_index = (bytes->r_index[0] << 16) 2286 | (bytes->r_index[1] << 8) 2287 | bytes->r_index[2]; 2288 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 2289 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2290 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2291 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2292 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 2293 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 2294 >> RELOC_STD_BITS_LENGTH_SH_BIG; 2295 } else { 2296 r_index = (bytes->r_index[2] << 16) 2297 | (bytes->r_index[1] << 8) 2298 | bytes->r_index[0]; 2299 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 2300 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2301 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2302 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2303 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); 2304 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 2305 >> RELOC_STD_BITS_LENGTH_SH_LITTLE; 2306 } 2307 2308 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel 2309 + 16 * r_jmptable + 32 * r_relative; 2310 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 2311 cache_ptr->howto = howto_table_std + howto_idx; 2312 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); 2313 2314 /* Base relative relocs are always against the symbol table, 2315 regardless of the setting of r_extern. r_extern just reflects 2316 whether the symbol the reloc is against is local or global. */ 2317 if (r_baserel) 2318 r_extern = 1; 2319 2320 if (r_extern && r_index > symcount) 2321 { 2322 /* We could arrange to return an error, but it might be useful 2323 to see the file even if it is bad. */ 2324 r_extern = 0; 2325 r_index = N_ABS; 2326 } 2327 2328 MOVE_ADDRESS(0); 2329} 2330 2331/* Read and swap the relocs for a section. */ 2332 2333boolean 2334NAME(aout,slurp_reloc_table) (abfd, asect, symbols) 2335 bfd *abfd; 2336 sec_ptr asect; 2337 asymbol **symbols; 2338{ 2339 unsigned int count; 2340 bfd_size_type reloc_size; 2341 PTR relocs; 2342 arelent *reloc_cache; 2343 size_t each_size; 2344 unsigned int counter = 0; 2345 arelent *cache_ptr; 2346 2347 if (asect->relocation) 2348 return true; 2349 2350 if (asect->flags & SEC_CONSTRUCTOR) 2351 return true; 2352 2353 if (asect == obj_datasec (abfd)) 2354 reloc_size = exec_hdr(abfd)->a_drsize; 2355 else if (asect == obj_textsec (abfd)) 2356 reloc_size = exec_hdr(abfd)->a_trsize; 2357 else if (asect == obj_bsssec (abfd)) 2358 reloc_size = 0; 2359 else 2360 { 2361 bfd_set_error (bfd_error_invalid_operation); 2362 return false; 2363 } 2364 2365 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) 2366 return false; 2367 2368 each_size = obj_reloc_entry_size (abfd); 2369 2370 count = reloc_size / each_size; 2371 2372 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent))); 2373 if (reloc_cache == NULL && count != 0) 2374 return false; 2375 memset (reloc_cache, 0, count * sizeof (arelent)); 2376 2377 relocs = bfd_malloc ((size_t) reloc_size); 2378 if (relocs == NULL && reloc_size != 0) 2379 { 2380 free (reloc_cache); 2381 return false; 2382 } 2383 2384 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) 2385 { 2386 free (relocs); 2387 free (reloc_cache); 2388 return false; 2389 } 2390 2391 cache_ptr = reloc_cache; 2392 if (each_size == RELOC_EXT_SIZE) 2393 { 2394 register struct reloc_ext_external *rptr = 2395 (struct reloc_ext_external *) relocs; 2396 2397 for (; counter < count; counter++, rptr++, cache_ptr++) 2398 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, 2399 bfd_get_symcount (abfd)); 2400 } 2401 else 2402 { 2403 register struct reloc_std_external *rptr = 2404 (struct reloc_std_external *) relocs; 2405 2406 for (; counter < count; counter++, rptr++, cache_ptr++) 2407 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, 2408 bfd_get_symcount (abfd)); 2409 } 2410 2411 free (relocs); 2412 2413 asect->relocation = reloc_cache; 2414 asect->reloc_count = cache_ptr - reloc_cache; 2415 2416 return true; 2417} 2418 2419/* Write out a relocation section into an object file. */ 2420 2421boolean 2422NAME(aout,squirt_out_relocs) (abfd, section) 2423 bfd *abfd; 2424 asection *section; 2425{ 2426 arelent **generic; 2427 unsigned char *native, *natptr; 2428 size_t each_size; 2429 2430 unsigned int count = section->reloc_count; 2431 size_t natsize; 2432 2433 if (count == 0 || section->orelocation == NULL) 2434 return true; 2435 2436 each_size = obj_reloc_entry_size (abfd); 2437 natsize = each_size * count; 2438 native = (unsigned char *) bfd_zalloc (abfd, natsize); 2439 if (!native) 2440 return false; 2441 2442 generic = section->orelocation; 2443 2444 if (each_size == RELOC_EXT_SIZE) 2445 { 2446 for (natptr = native; 2447 count != 0; 2448 --count, natptr += each_size, ++generic) 2449 MY_swap_ext_reloc_out (abfd, *generic, 2450 (struct reloc_ext_external *) natptr); 2451 } 2452 else 2453 { 2454 for (natptr = native; 2455 count != 0; 2456 --count, natptr += each_size, ++generic) 2457 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr); 2458 } 2459 2460 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { 2461 bfd_release(abfd, native); 2462 return false; 2463 } 2464 bfd_release (abfd, native); 2465 2466 return true; 2467} 2468 2469/* This is stupid. This function should be a boolean predicate */ 2470long 2471NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols) 2472 bfd *abfd; 2473 sec_ptr section; 2474 arelent **relptr; 2475 asymbol **symbols; 2476{ 2477 arelent *tblptr = section->relocation; 2478 unsigned int count; 2479 2480 if (section == obj_bsssec (abfd)) 2481 { 2482 *relptr = NULL; 2483 return 0; 2484 } 2485 2486 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols))) 2487 return -1; 2488 2489 if (section->flags & SEC_CONSTRUCTOR) { 2490 arelent_chain *chain = section->constructor_chain; 2491 for (count = 0; count < section->reloc_count; count ++) { 2492 *relptr ++ = &chain->relent; 2493 chain = chain->next; 2494 } 2495 } 2496 else { 2497 tblptr = section->relocation; 2498 2499 for (count = 0; count++ < section->reloc_count;) 2500 { 2501 *relptr++ = tblptr++; 2502 } 2503 } 2504 *relptr = 0; 2505 2506 return section->reloc_count; 2507} 2508 2509long 2510NAME(aout,get_reloc_upper_bound) (abfd, asect) 2511 bfd *abfd; 2512 sec_ptr asect; 2513{ 2514 if (bfd_get_format (abfd) != bfd_object) { 2515 bfd_set_error (bfd_error_invalid_operation); 2516 return -1; 2517 } 2518 if (asect->flags & SEC_CONSTRUCTOR) { 2519 return (sizeof (arelent *) * (asect->reloc_count+1)); 2520 } 2521 2522 if (asect == obj_datasec (abfd)) 2523 return (sizeof (arelent *) 2524 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd)) 2525 + 1)); 2526 2527 if (asect == obj_textsec (abfd)) 2528 return (sizeof (arelent *) 2529 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd)) 2530 + 1)); 2531 2532 if (asect == obj_bsssec (abfd)) 2533 return sizeof (arelent *); 2534 2535 if (asect == obj_bsssec (abfd)) 2536 return 0; 2537 2538 bfd_set_error (bfd_error_invalid_operation); 2539 return -1; 2540} 2541 2542long 2543NAME(aout,get_symtab_upper_bound) (abfd) 2544 bfd *abfd; 2545{ 2546 if (!NAME(aout,slurp_symbol_table) (abfd)) 2547 return -1; 2548 2549 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); 2550} 2551 2552 alent * 2553NAME(aout,get_lineno) (ignore_abfd, ignore_symbol) 2554 bfd *ignore_abfd ATTRIBUTE_UNUSED; 2555 asymbol *ignore_symbol ATTRIBUTE_UNUSED; 2556{ 2557 return (alent *)NULL; 2558} 2559 2560void 2561NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret) 2562 bfd *ignore_abfd ATTRIBUTE_UNUSED; 2563 asymbol *symbol; 2564 symbol_info *ret; 2565{ 2566 bfd_symbol_info (symbol, ret); 2567 2568 if (ret->type == '?') 2569 { 2570 int type_code = aout_symbol(symbol)->type & 0xff; 2571 const char *stab_name = bfd_get_stab_name (type_code); 2572 static char buf[10]; 2573 2574 if (stab_name == NULL) 2575 { 2576 sprintf (buf, "(%d)", type_code); 2577 stab_name = buf; 2578 } 2579 ret->type = '-'; 2580 ret->stab_type = type_code; 2581 ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff); 2582 ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff); 2583 ret->stab_name = stab_name; 2584 } 2585} 2586 2587void 2588NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how) 2589 bfd *ignore_abfd ATTRIBUTE_UNUSED; 2590 PTR afile; 2591 asymbol *symbol; 2592 bfd_print_symbol_type how; 2593{ 2594 FILE *file = (FILE *)afile; 2595 2596 switch (how) { 2597 case bfd_print_symbol_name: 2598 if (symbol->name) 2599 fprintf (file,"%s", symbol->name); 2600 break; 2601 case bfd_print_symbol_more: 2602 fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff), 2603 (unsigned) (aout_symbol(symbol)->other & 0xff), 2604 (unsigned) (aout_symbol(symbol)->type)); 2605 break; 2606 case bfd_print_symbol_all: 2607 { 2608 CONST char *section_name = symbol->section->name; 2609 2610 bfd_print_symbol_vandf((PTR)file,symbol); 2611 2612 fprintf (file," %-5s %04x %02x %02x", 2613 section_name, 2614 (unsigned) (aout_symbol(symbol)->desc & 0xffff), 2615 (unsigned) (aout_symbol(symbol)->other & 0xff), 2616 (unsigned) (aout_symbol(symbol)->type & 0xff)); 2617 if (symbol->name) 2618 fprintf (file," %s", symbol->name); 2619 } 2620 break; 2621 } 2622} 2623 2624/* If we don't have to allocate more than 1MB to hold the generic 2625 symbols, we use the generic minisymbol methord: it's faster, since 2626 it only translates the symbols once, not multiple times. */ 2627#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) 2628 2629/* Read minisymbols. For minisymbols, we use the unmodified a.out 2630 symbols. The minisymbol_to_symbol function translates these into 2631 BFD asymbol structures. */ 2632 2633long 2634NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep) 2635 bfd *abfd; 2636 boolean dynamic; 2637 PTR *minisymsp; 2638 unsigned int *sizep; 2639{ 2640 if (dynamic) 2641 { 2642 /* We could handle the dynamic symbols here as well, but it's 2643 easier to hand them off. */ 2644 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2645 } 2646 2647 if (! aout_get_external_symbols (abfd)) 2648 return -1; 2649 2650 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2651 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); 2652 2653 *minisymsp = (PTR) obj_aout_external_syms (abfd); 2654 2655 /* By passing the external symbols back from this routine, we are 2656 giving up control over the memory block. Clear 2657 obj_aout_external_syms, so that we do not try to free it 2658 ourselves. */ 2659 obj_aout_external_syms (abfd) = NULL; 2660 2661 *sizep = EXTERNAL_NLIST_SIZE; 2662 return obj_aout_external_sym_count (abfd); 2663} 2664 2665/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an 2666 unmodified a.out symbol. The SYM argument is a structure returned 2667 by bfd_make_empty_symbol, which we fill in here. */ 2668 2669asymbol * 2670NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym) 2671 bfd *abfd; 2672 boolean dynamic; 2673 const PTR minisym; 2674 asymbol *sym; 2675{ 2676 if (dynamic 2677 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) 2678 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); 2679 2680 memset (sym, 0, sizeof (aout_symbol_type)); 2681 2682 /* We call translate_symbol_table to translate a single symbol. */ 2683 if (! (NAME(aout,translate_symbol_table) 2684 (abfd, 2685 (aout_symbol_type *) sym, 2686 (struct external_nlist *) minisym, 2687 (bfd_size_type) 1, 2688 obj_aout_external_strings (abfd), 2689 obj_aout_external_string_size (abfd), 2690 false))) 2691 return NULL; 2692 2693 return sym; 2694} 2695 2696/* 2697 provided a BFD, a section and an offset into the section, calculate 2698 and return the name of the source file and the line nearest to the 2699 wanted location. 2700*/ 2701 2702boolean 2703NAME(aout,find_nearest_line) 2704 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) 2705 bfd *abfd; 2706 asection *section; 2707 asymbol **symbols; 2708 bfd_vma offset; 2709 CONST char **filename_ptr; 2710 CONST char **functionname_ptr; 2711 unsigned int *line_ptr; 2712{ 2713 /* Run down the file looking for the filename, function and linenumber */ 2714 asymbol **p; 2715 CONST char *directory_name = NULL; 2716 CONST char *main_file_name = NULL; 2717 CONST char *current_file_name = NULL; 2718 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */ 2719 CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */ 2720 bfd_vma low_line_vma = 0; 2721 bfd_vma low_func_vma = 0; 2722 asymbol *func = 0; 2723 size_t filelen, funclen; 2724 char *buf; 2725 2726 *filename_ptr = abfd->filename; 2727 *functionname_ptr = 0; 2728 *line_ptr = 0; 2729 if (symbols != (asymbol **)NULL) { 2730 for (p = symbols; *p; p++) { 2731 aout_symbol_type *q = (aout_symbol_type *) (*p); 2732 next: 2733 switch (q->type){ 2734 case N_TEXT: 2735 /* If this looks like a file name symbol, and it comes after 2736 the line number we have found so far, but before the 2737 offset, then we have probably not found the right line 2738 number. */ 2739 if (q->symbol.value <= offset 2740 && ((q->symbol.value > low_line_vma 2741 && (line_file_name != NULL 2742 || *line_ptr != 0)) 2743 || (q->symbol.value > low_func_vma 2744 && func != NULL))) 2745 { 2746 const char *symname; 2747 2748 symname = q->symbol.name; 2749 if (strcmp (symname + strlen (symname) - 2, ".o") == 0) 2750 { 2751 if (q->symbol.value > low_line_vma) 2752 { 2753 *line_ptr = 0; 2754 line_file_name = NULL; 2755 } 2756 if (q->symbol.value > low_func_vma) 2757 func = NULL; 2758 } 2759 } 2760 break; 2761 2762 case N_SO: 2763 /* If this symbol is less than the offset, but greater than 2764 the line number we have found so far, then we have not 2765 found the right line number. */ 2766 if (q->symbol.value <= offset) 2767 { 2768 if (q->symbol.value > low_line_vma) 2769 { 2770 *line_ptr = 0; 2771 line_file_name = NULL; 2772 } 2773 if (q->symbol.value > low_func_vma) 2774 func = NULL; 2775 } 2776 2777 main_file_name = current_file_name = q->symbol.name; 2778 /* Look ahead to next symbol to check if that too is an N_SO. */ 2779 p++; 2780 if (*p == NULL) 2781 break; 2782 q = (aout_symbol_type *) (*p); 2783 if (q->type != (int)N_SO) 2784 goto next; 2785 2786 /* Found a second N_SO First is directory; second is filename. */ 2787 directory_name = current_file_name; 2788 main_file_name = current_file_name = q->symbol.name; 2789 if (obj_textsec(abfd) != section) 2790 goto done; 2791 break; 2792 case N_SOL: 2793 current_file_name = q->symbol.name; 2794 break; 2795 2796 case N_SLINE: 2797 2798 case N_DSLINE: 2799 case N_BSLINE: 2800 /* We'll keep this if it resolves nearer than the one we have 2801 already. */ 2802 if (q->symbol.value >= low_line_vma 2803 && q->symbol.value <= offset) 2804 { 2805 *line_ptr = q->desc; 2806 low_line_vma = q->symbol.value; 2807 line_file_name = current_file_name; 2808 line_directory_name = directory_name; 2809 } 2810 break; 2811 case N_FUN: 2812 { 2813 /* We'll keep this if it is nearer than the one we have already */ 2814 if (q->symbol.value >= low_func_vma && 2815 q->symbol.value <= offset) { 2816 low_func_vma = q->symbol.value; 2817 func = (asymbol *)q; 2818 } 2819 else if (q->symbol.value > offset) 2820 goto done; 2821 } 2822 break; 2823 } 2824 } 2825 } 2826 2827 done: 2828 if (*line_ptr != 0) 2829 { 2830 main_file_name = line_file_name; 2831 directory_name = line_directory_name; 2832 } 2833 2834 if (main_file_name == NULL 2835 || IS_ABSOLUTE_PATH (main_file_name) 2836 || directory_name == NULL) 2837 filelen = 0; 2838 else 2839 filelen = strlen (directory_name) + strlen (main_file_name); 2840 if (func == NULL) 2841 funclen = 0; 2842 else 2843 funclen = strlen (bfd_asymbol_name (func)); 2844 2845 if (adata (abfd).line_buf != NULL) 2846 free (adata (abfd).line_buf); 2847 if (filelen + funclen == 0) 2848 adata (abfd).line_buf = buf = NULL; 2849 else 2850 { 2851 buf = (char *) bfd_malloc (filelen + funclen + 3); 2852 adata (abfd).line_buf = buf; 2853 if (buf == NULL) 2854 return false; 2855 } 2856 2857 if (main_file_name != NULL) 2858 { 2859 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) 2860 *filename_ptr = main_file_name; 2861 else 2862 { 2863 sprintf (buf, "%s%s", directory_name, main_file_name); 2864 *filename_ptr = buf; 2865 buf += filelen + 1; 2866 } 2867 } 2868 2869 if (func) 2870 { 2871 const char *function = func->name; 2872 char *p; 2873 2874 /* The caller expects a symbol name. We actually have a 2875 function name, without the leading underscore. Put the 2876 underscore back in, so that the caller gets a symbol name. */ 2877 if (bfd_get_symbol_leading_char (abfd) == '\0') 2878 strcpy (buf, function); 2879 else 2880 { 2881 buf[0] = bfd_get_symbol_leading_char (abfd); 2882 strcpy (buf + 1, function); 2883 } 2884 /* Have to remove : stuff */ 2885 p = strchr (buf, ':'); 2886 if (p != NULL) 2887 *p = '\0'; 2888 *functionname_ptr = buf; 2889 } 2890 2891 return true; 2892} 2893 2894int 2895NAME(aout,sizeof_headers) (abfd, execable) 2896 bfd *abfd; 2897 boolean execable ATTRIBUTE_UNUSED; 2898{ 2899 return adata(abfd).exec_bytes_size; 2900} 2901 2902/* Free all information we have cached for this BFD. We can always 2903 read it again later if we need it. */ 2904 2905boolean 2906NAME(aout,bfd_free_cached_info) (abfd) 2907 bfd *abfd; 2908{ 2909 asection *o; 2910 2911 if (bfd_get_format (abfd) != bfd_object 2912 || abfd->tdata.aout_data == NULL) 2913 return true; 2914 2915#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } 2916 BFCI_FREE (obj_aout_symbols (abfd)); 2917#ifdef USE_MMAP 2918 obj_aout_external_syms (abfd) = 0; 2919 bfd_free_window (&obj_aout_sym_window (abfd)); 2920 bfd_free_window (&obj_aout_string_window (abfd)); 2921 obj_aout_external_strings (abfd) = 0; 2922#else 2923 BFCI_FREE (obj_aout_external_syms (abfd)); 2924 BFCI_FREE (obj_aout_external_strings (abfd)); 2925#endif 2926 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 2927 BFCI_FREE (o->relocation); 2928#undef BFCI_FREE 2929 2930 return true; 2931} 2932 2933/* a.out link code. */ 2934 2935static boolean aout_link_add_object_symbols 2936 PARAMS ((bfd *, struct bfd_link_info *)); 2937static boolean aout_link_check_archive_element 2938 PARAMS ((bfd *, struct bfd_link_info *, boolean *)); 2939static boolean aout_link_free_symbols PARAMS ((bfd *)); 2940static boolean aout_link_check_ar_symbols 2941 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded)); 2942static boolean aout_link_add_symbols 2943 PARAMS ((bfd *, struct bfd_link_info *)); 2944 2945/* Routine to create an entry in an a.out link hash table. */ 2946 2947struct bfd_hash_entry * 2948NAME(aout,link_hash_newfunc) (entry, table, string) 2949 struct bfd_hash_entry *entry; 2950 struct bfd_hash_table *table; 2951 const char *string; 2952{ 2953 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; 2954 2955 /* Allocate the structure if it has not already been allocated by a 2956 subclass. */ 2957 if (ret == (struct aout_link_hash_entry *) NULL) 2958 ret = ((struct aout_link_hash_entry *) 2959 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry))); 2960 if (ret == (struct aout_link_hash_entry *) NULL) 2961 return (struct bfd_hash_entry *) ret; 2962 2963 /* Call the allocation method of the superclass. */ 2964 ret = ((struct aout_link_hash_entry *) 2965 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, 2966 table, string)); 2967 if (ret) 2968 { 2969 /* Set local fields. */ 2970 ret->written = false; 2971 ret->indx = -1; 2972 } 2973 2974 return (struct bfd_hash_entry *) ret; 2975} 2976 2977/* Initialize an a.out link hash table. */ 2978 2979boolean 2980NAME(aout,link_hash_table_init) (table, abfd, newfunc) 2981 struct aout_link_hash_table *table; 2982 bfd *abfd; 2983 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, 2984 struct bfd_hash_table *, 2985 const char *)); 2986{ 2987 return _bfd_link_hash_table_init (&table->root, abfd, newfunc); 2988} 2989 2990/* Create an a.out link hash table. */ 2991 2992struct bfd_link_hash_table * 2993NAME(aout,link_hash_table_create) (abfd) 2994 bfd *abfd; 2995{ 2996 struct aout_link_hash_table *ret; 2997 2998 ret = ((struct aout_link_hash_table *) 2999 bfd_alloc (abfd, sizeof (struct aout_link_hash_table))); 3000 if (ret == NULL) 3001 return (struct bfd_link_hash_table *) NULL; 3002 if (! NAME(aout,link_hash_table_init) (ret, abfd, 3003 NAME(aout,link_hash_newfunc))) 3004 { 3005 free (ret); 3006 return (struct bfd_link_hash_table *) NULL; 3007 } 3008 return &ret->root; 3009} 3010 3011/* Given an a.out BFD, add symbols to the global hash table as 3012 appropriate. */ 3013 3014boolean 3015NAME(aout,link_add_symbols) (abfd, info) 3016 bfd *abfd; 3017 struct bfd_link_info *info; 3018{ 3019 switch (bfd_get_format (abfd)) 3020 { 3021 case bfd_object: 3022 return aout_link_add_object_symbols (abfd, info); 3023 case bfd_archive: 3024 return _bfd_generic_link_add_archive_symbols 3025 (abfd, info, aout_link_check_archive_element); 3026 default: 3027 bfd_set_error (bfd_error_wrong_format); 3028 return false; 3029 } 3030} 3031 3032/* Add symbols from an a.out object file. */ 3033 3034static boolean 3035aout_link_add_object_symbols (abfd, info) 3036 bfd *abfd; 3037 struct bfd_link_info *info; 3038{ 3039 if (! aout_get_external_symbols (abfd)) 3040 return false; 3041 if (! aout_link_add_symbols (abfd, info)) 3042 return false; 3043 if (! info->keep_memory) 3044 { 3045 if (! aout_link_free_symbols (abfd)) 3046 return false; 3047 } 3048 return true; 3049} 3050 3051/* Check a single archive element to see if we need to include it in 3052 the link. *PNEEDED is set according to whether this element is 3053 needed in the link or not. This is called from 3054 _bfd_generic_link_add_archive_symbols. */ 3055 3056static boolean 3057aout_link_check_archive_element (abfd, info, pneeded) 3058 bfd *abfd; 3059 struct bfd_link_info *info; 3060 boolean *pneeded; 3061{ 3062 if (! aout_get_external_symbols (abfd)) 3063 return false; 3064 3065 if (! aout_link_check_ar_symbols (abfd, info, pneeded)) 3066 return false; 3067 3068 if (*pneeded) 3069 { 3070 if (! aout_link_add_symbols (abfd, info)) 3071 return false; 3072 } 3073 3074 if (! info->keep_memory || ! *pneeded) 3075 { 3076 if (! aout_link_free_symbols (abfd)) 3077 return false; 3078 } 3079 3080 return true; 3081} 3082 3083/* Free up the internal symbols read from an a.out file. */ 3084 3085static boolean 3086aout_link_free_symbols (abfd) 3087 bfd *abfd; 3088{ 3089 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) 3090 { 3091#ifdef USE_MMAP 3092 bfd_free_window (&obj_aout_sym_window (abfd)); 3093#else 3094 free ((PTR) obj_aout_external_syms (abfd)); 3095#endif 3096 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL; 3097 } 3098 if (obj_aout_external_strings (abfd) != (char *) NULL) 3099 { 3100#ifdef USE_MMAP 3101 bfd_free_window (&obj_aout_string_window (abfd)); 3102#else 3103 free ((PTR) obj_aout_external_strings (abfd)); 3104#endif 3105 obj_aout_external_strings (abfd) = (char *) NULL; 3106 } 3107 return true; 3108} 3109 3110/* Look through the internal symbols to see if this object file should 3111 be included in the link. We should include this object file if it 3112 defines any symbols which are currently undefined. If this object 3113 file defines a common symbol, then we may adjust the size of the 3114 known symbol but we do not include the object file in the link 3115 (unless there is some other reason to include it). */ 3116 3117static boolean 3118aout_link_check_ar_symbols (abfd, info, pneeded) 3119 bfd *abfd; 3120 struct bfd_link_info *info; 3121 boolean *pneeded; 3122{ 3123 register struct external_nlist *p; 3124 struct external_nlist *pend; 3125 char *strings; 3126 3127 *pneeded = false; 3128 3129 /* Look through all the symbols. */ 3130 p = obj_aout_external_syms (abfd); 3131 pend = p + obj_aout_external_sym_count (abfd); 3132 strings = obj_aout_external_strings (abfd); 3133 for (; p < pend; p++) 3134 { 3135 int type = bfd_h_get_8 (abfd, p->e_type); 3136 const char *name; 3137 struct bfd_link_hash_entry *h; 3138 3139 /* Ignore symbols that are not externally visible. This is an 3140 optimization only, as we check the type more thoroughly 3141 below. */ 3142 if (((type & N_EXT) == 0 3143 || (type & N_STAB) != 0 3144 || type == N_FN) 3145 && type != N_WEAKA 3146 && type != N_WEAKT 3147 && type != N_WEAKD 3148 && type != N_WEAKB) 3149 { 3150 if (type == N_WARNING 3151 || type == N_INDR) 3152 ++p; 3153 continue; 3154 } 3155 3156 name = strings + GET_WORD (abfd, p->e_strx); 3157 h = bfd_link_hash_lookup (info->hash, name, false, false, true); 3158 3159 /* We are only interested in symbols that are currently 3160 undefined or common. */ 3161 if (h == (struct bfd_link_hash_entry *) NULL 3162 || (h->type != bfd_link_hash_undefined 3163 && h->type != bfd_link_hash_common)) 3164 { 3165 if (type == (N_INDR | N_EXT)) 3166 ++p; 3167 continue; 3168 } 3169 3170 if (type == (N_TEXT | N_EXT) 3171 || type == (N_DATA | N_EXT) 3172 || type == (N_BSS | N_EXT) 3173 || type == (N_ABS | N_EXT) 3174 || type == (N_INDR | N_EXT)) 3175 { 3176 /* This object file defines this symbol. We must link it 3177 in. This is true regardless of whether the current 3178 definition of the symbol is undefined or common. If the 3179 current definition is common, we have a case in which we 3180 have already seen an object file including 3181 int a; 3182 and this object file from the archive includes 3183 int a = 5; 3184 In such a case we must include this object file. 3185 3186 FIXME: The SunOS 4.1.3 linker will pull in the archive 3187 element if the symbol is defined in the .data section, 3188 but not if it is defined in the .text section. That 3189 seems a bit crazy to me, and I haven't implemented it. 3190 However, it might be correct. */ 3191 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3192 return false; 3193 *pneeded = true; 3194 return true; 3195 } 3196 3197 if (type == (N_UNDF | N_EXT)) 3198 { 3199 bfd_vma value; 3200 3201 value = GET_WORD (abfd, p->e_value); 3202 if (value != 0) 3203 { 3204 /* This symbol is common in the object from the archive 3205 file. */ 3206 if (h->type == bfd_link_hash_undefined) 3207 { 3208 bfd *symbfd; 3209 unsigned int power; 3210 3211 symbfd = h->u.undef.abfd; 3212 if (symbfd == (bfd *) NULL) 3213 { 3214 /* This symbol was created as undefined from 3215 outside BFD. We assume that we should link 3216 in the object file. This is done for the -u 3217 option in the linker. */ 3218 if (! (*info->callbacks->add_archive_element) (info, 3219 abfd, 3220 name)) 3221 return false; 3222 *pneeded = true; 3223 return true; 3224 } 3225 /* Turn the current link symbol into a common 3226 symbol. It is already on the undefs list. */ 3227 h->type = bfd_link_hash_common; 3228 h->u.c.p = ((struct bfd_link_hash_common_entry *) 3229 bfd_hash_allocate (&info->hash->table, 3230 sizeof (struct bfd_link_hash_common_entry))); 3231 if (h->u.c.p == NULL) 3232 return false; 3233 3234 h->u.c.size = value; 3235 3236 /* FIXME: This isn't quite right. The maximum 3237 alignment of a common symbol should be set by the 3238 architecture of the output file, not of the input 3239 file. */ 3240 power = bfd_log2 (value); 3241 if (power > bfd_get_arch_info (abfd)->section_align_power) 3242 power = bfd_get_arch_info (abfd)->section_align_power; 3243 h->u.c.p->alignment_power = power; 3244 3245 h->u.c.p->section = bfd_make_section_old_way (symbfd, 3246 "COMMON"); 3247 } 3248 else 3249 { 3250 /* Adjust the size of the common symbol if 3251 necessary. */ 3252 if (value > h->u.c.size) 3253 h->u.c.size = value; 3254 } 3255 } 3256 } 3257 3258 if (type == N_WEAKA 3259 || type == N_WEAKT 3260 || type == N_WEAKD 3261 || type == N_WEAKB) 3262 { 3263 /* This symbol is weak but defined. We must pull it in if 3264 the current link symbol is undefined, but we don't want 3265 it if the current link symbol is common. */ 3266 if (h->type == bfd_link_hash_undefined) 3267 { 3268 if (! (*info->callbacks->add_archive_element) (info, abfd, name)) 3269 return false; 3270 *pneeded = true; 3271 return true; 3272 } 3273 } 3274 } 3275 3276 /* We do not need this object file. */ 3277 return true; 3278} 3279 3280/* Add all symbols from an object file to the hash table. */ 3281 3282static boolean 3283aout_link_add_symbols (abfd, info) 3284 bfd *abfd; 3285 struct bfd_link_info *info; 3286{ 3287 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *, 3288 const char *, flagword, asection *, 3289 bfd_vma, const char *, boolean, 3290 boolean, 3291 struct bfd_link_hash_entry **)); 3292 struct external_nlist *syms; 3293 bfd_size_type sym_count; 3294 char *strings; 3295 boolean copy; 3296 struct aout_link_hash_entry **sym_hash; 3297 register struct external_nlist *p; 3298 struct external_nlist *pend; 3299 3300 syms = obj_aout_external_syms (abfd); 3301 sym_count = obj_aout_external_sym_count (abfd); 3302 strings = obj_aout_external_strings (abfd); 3303 if (info->keep_memory) 3304 copy = false; 3305 else 3306 copy = true; 3307 3308 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) 3309 { 3310 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) 3311 (abfd, info, &syms, &sym_count, &strings))) 3312 return false; 3313 } 3314 3315 /* We keep a list of the linker hash table entries that correspond 3316 to particular symbols. We could just look them up in the hash 3317 table, but keeping the list is more efficient. Perhaps this 3318 should be conditional on info->keep_memory. */ 3319 sym_hash = ((struct aout_link_hash_entry **) 3320 bfd_alloc (abfd, 3321 ((size_t) sym_count 3322 * sizeof (struct aout_link_hash_entry *)))); 3323 if (sym_hash == NULL && sym_count != 0) 3324 return false; 3325 obj_aout_sym_hashes (abfd) = sym_hash; 3326 3327 add_one_symbol = aout_backend_info (abfd)->add_one_symbol; 3328 if (add_one_symbol == NULL) 3329 add_one_symbol = _bfd_generic_link_add_one_symbol; 3330 3331 p = syms; 3332 pend = p + sym_count; 3333 for (; p < pend; p++, sym_hash++) 3334 { 3335 int type; 3336 const char *name; 3337 bfd_vma value; 3338 asection *section; 3339 flagword flags; 3340 const char *string; 3341 3342 *sym_hash = NULL; 3343 3344 type = bfd_h_get_8 (abfd, p->e_type); 3345 3346 /* Ignore debugging symbols. */ 3347 if ((type & N_STAB) != 0) 3348 continue; 3349 3350 name = strings + GET_WORD (abfd, p->e_strx); 3351 value = GET_WORD (abfd, p->e_value); 3352 flags = BSF_GLOBAL; 3353 string = NULL; 3354 switch (type) 3355 { 3356 default: 3357 abort (); 3358 3359 case N_UNDF: 3360 case N_ABS: 3361 case N_TEXT: 3362 case N_DATA: 3363 case N_BSS: 3364 case N_FN_SEQ: 3365 case N_COMM: 3366 case N_SETV: 3367 case N_FN: 3368 /* Ignore symbols that are not externally visible. */ 3369 continue; 3370 case N_INDR: 3371 /* Ignore local indirect symbol. */ 3372 ++p; 3373 ++sym_hash; 3374 continue; 3375 3376 case N_UNDF | N_EXT: 3377 if (value == 0) 3378 { 3379 section = bfd_und_section_ptr; 3380 flags = 0; 3381 } 3382 else 3383 section = bfd_com_section_ptr; 3384 break; 3385 case N_ABS | N_EXT: 3386 section = bfd_abs_section_ptr; 3387 break; 3388 case N_TEXT | N_EXT: 3389 section = obj_textsec (abfd); 3390 value -= bfd_get_section_vma (abfd, section); 3391 break; 3392 case N_DATA | N_EXT: 3393 case N_SETV | N_EXT: 3394 /* Treat N_SETV symbols as N_DATA symbol; see comment in 3395 translate_from_native_sym_flags. */ 3396 section = obj_datasec (abfd); 3397 value -= bfd_get_section_vma (abfd, section); 3398 break; 3399 case N_BSS | N_EXT: 3400 section = obj_bsssec (abfd); 3401 value -= bfd_get_section_vma (abfd, section); 3402 break; 3403 case N_INDR | N_EXT: 3404 /* An indirect symbol. The next symbol is the symbol 3405 which this one really is. */ 3406 BFD_ASSERT (p + 1 < pend); 3407 ++p; 3408 string = strings + GET_WORD (abfd, p->e_strx); 3409 section = bfd_ind_section_ptr; 3410 flags |= BSF_INDIRECT; 3411 break; 3412 case N_COMM | N_EXT: 3413 section = bfd_com_section_ptr; 3414 break; 3415 case N_SETA: case N_SETA | N_EXT: 3416 section = bfd_abs_section_ptr; 3417 flags |= BSF_CONSTRUCTOR; 3418 break; 3419 case N_SETT: case N_SETT | N_EXT: 3420 section = obj_textsec (abfd); 3421 flags |= BSF_CONSTRUCTOR; 3422 value -= bfd_get_section_vma (abfd, section); 3423 break; 3424 case N_SETD: case N_SETD | N_EXT: 3425 section = obj_datasec (abfd); 3426 flags |= BSF_CONSTRUCTOR; 3427 value -= bfd_get_section_vma (abfd, section); 3428 break; 3429 case N_SETB: case N_SETB | N_EXT: 3430 section = obj_bsssec (abfd); 3431 flags |= BSF_CONSTRUCTOR; 3432 value -= bfd_get_section_vma (abfd, section); 3433 break; 3434 case N_WARNING: 3435 /* A warning symbol. The next symbol is the one to warn 3436 about. */ 3437 BFD_ASSERT (p + 1 < pend); 3438 ++p; 3439 string = name; 3440 name = strings + GET_WORD (abfd, p->e_strx); 3441 section = bfd_und_section_ptr; 3442 flags |= BSF_WARNING; 3443 break; 3444 case N_WEAKU: 3445 section = bfd_und_section_ptr; 3446 flags = BSF_WEAK; 3447 break; 3448 case N_WEAKA: 3449 section = bfd_abs_section_ptr; 3450 flags = BSF_WEAK; 3451 break; 3452 case N_WEAKT: 3453 section = obj_textsec (abfd); 3454 value -= bfd_get_section_vma (abfd, section); 3455 flags = BSF_WEAK; 3456 break; 3457 case N_WEAKD: 3458 section = obj_datasec (abfd); 3459 value -= bfd_get_section_vma (abfd, section); 3460 flags = BSF_WEAK; 3461 break; 3462 case N_WEAKB: 3463 section = obj_bsssec (abfd); 3464 value -= bfd_get_section_vma (abfd, section); 3465 flags = BSF_WEAK; 3466 break; 3467 } 3468 3469 if (! ((*add_one_symbol) 3470 (info, abfd, name, flags, section, value, string, copy, false, 3471 (struct bfd_link_hash_entry **) sym_hash))) 3472 return false; 3473 3474 /* Restrict the maximum alignment of a common symbol based on 3475 the architecture, since a.out has no way to represent 3476 alignment requirements of a section in a .o file. FIXME: 3477 This isn't quite right: it should use the architecture of the 3478 output file, not the input files. */ 3479 if ((*sym_hash)->root.type == bfd_link_hash_common 3480 && ((*sym_hash)->root.u.c.p->alignment_power > 3481 bfd_get_arch_info (abfd)->section_align_power)) 3482 (*sym_hash)->root.u.c.p->alignment_power = 3483 bfd_get_arch_info (abfd)->section_align_power; 3484 3485 /* If this is a set symbol, and we are not building sets, then 3486 it is possible for the hash entry to not have been set. In 3487 such a case, treat the symbol as not globally defined. */ 3488 if ((*sym_hash)->root.type == bfd_link_hash_new) 3489 { 3490 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); 3491 *sym_hash = NULL; 3492 } 3493 3494 if (type == (N_INDR | N_EXT) || type == N_WARNING) 3495 ++sym_hash; 3496 } 3497 3498 return true; 3499} 3500 3501/* A hash table used for header files with N_BINCL entries. */ 3502 3503struct aout_link_includes_table 3504{ 3505 struct bfd_hash_table root; 3506}; 3507 3508/* A linked list of totals that we have found for a particular header 3509 file. */ 3510 3511struct aout_link_includes_totals 3512{ 3513 struct aout_link_includes_totals *next; 3514 bfd_vma total; 3515}; 3516 3517/* An entry in the header file hash table. */ 3518 3519struct aout_link_includes_entry 3520{ 3521 struct bfd_hash_entry root; 3522 /* List of totals we have found for this file. */ 3523 struct aout_link_includes_totals *totals; 3524}; 3525 3526/* Look up an entry in an the header file hash table. */ 3527 3528#define aout_link_includes_lookup(table, string, create, copy) \ 3529 ((struct aout_link_includes_entry *) \ 3530 bfd_hash_lookup (&(table)->root, (string), (create), (copy))) 3531 3532/* During the final link step we need to pass around a bunch of 3533 information, so we do it in an instance of this structure. */ 3534 3535struct aout_final_link_info 3536{ 3537 /* General link information. */ 3538 struct bfd_link_info *info; 3539 /* Output bfd. */ 3540 bfd *output_bfd; 3541 /* Reloc file positions. */ 3542 file_ptr treloff, dreloff; 3543 /* File position of symbols. */ 3544 file_ptr symoff; 3545 /* String table. */ 3546 struct bfd_strtab_hash *strtab; 3547 /* Header file hash table. */ 3548 struct aout_link_includes_table includes; 3549 /* A buffer large enough to hold the contents of any section. */ 3550 bfd_byte *contents; 3551 /* A buffer large enough to hold the relocs of any section. */ 3552 PTR relocs; 3553 /* A buffer large enough to hold the symbol map of any input BFD. */ 3554 int *symbol_map; 3555 /* A buffer large enough to hold output symbols of any input BFD. */ 3556 struct external_nlist *output_syms; 3557}; 3558 3559static struct bfd_hash_entry *aout_link_includes_newfunc 3560 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 3561static boolean aout_link_input_bfd 3562 PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); 3563static boolean aout_link_write_symbols 3564 PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); 3565static boolean aout_link_write_other_symbol 3566 PARAMS ((struct aout_link_hash_entry *, PTR)); 3567static boolean aout_link_input_section 3568 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3569 asection *input_section, file_ptr *reloff_ptr, 3570 bfd_size_type rel_size)); 3571static boolean aout_link_input_section_std 3572 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3573 asection *input_section, struct reloc_std_external *, 3574 bfd_size_type rel_size, bfd_byte *contents)); 3575static boolean aout_link_input_section_ext 3576 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, 3577 asection *input_section, struct reloc_ext_external *, 3578 bfd_size_type rel_size, bfd_byte *contents)); 3579static INLINE asection *aout_reloc_index_to_section 3580 PARAMS ((bfd *, int)); 3581static boolean aout_link_reloc_link_order 3582 PARAMS ((struct aout_final_link_info *, asection *, 3583 struct bfd_link_order *)); 3584 3585/* The function to create a new entry in the header file hash table. */ 3586 3587static struct bfd_hash_entry * 3588aout_link_includes_newfunc (entry, table, string) 3589 struct bfd_hash_entry *entry; 3590 struct bfd_hash_table *table; 3591 const char *string; 3592{ 3593 struct aout_link_includes_entry *ret = 3594 (struct aout_link_includes_entry *) entry; 3595 3596 /* Allocate the structure if it has not already been allocated by a 3597 subclass. */ 3598 if (ret == (struct aout_link_includes_entry *) NULL) 3599 ret = ((struct aout_link_includes_entry *) 3600 bfd_hash_allocate (table, 3601 sizeof (struct aout_link_includes_entry))); 3602 if (ret == (struct aout_link_includes_entry *) NULL) 3603 return (struct bfd_hash_entry *) ret; 3604 3605 /* Call the allocation method of the superclass. */ 3606 ret = ((struct aout_link_includes_entry *) 3607 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); 3608 if (ret) 3609 { 3610 /* Set local fields. */ 3611 ret->totals = NULL; 3612 } 3613 3614 return (struct bfd_hash_entry *) ret; 3615} 3616 3617/* Do the final link step. This is called on the output BFD. The 3618 INFO structure should point to a list of BFDs linked through the 3619 link_next field which can be used to find each BFD which takes part 3620 in the output. Also, each section in ABFD should point to a list 3621 of bfd_link_order structures which list all the input sections for 3622 the output section. */ 3623 3624boolean 3625NAME(aout,final_link) (abfd, info, callback) 3626 bfd *abfd; 3627 struct bfd_link_info *info; 3628 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); 3629{ 3630 struct aout_final_link_info aout_info; 3631 boolean includes_hash_initialized = false; 3632 register bfd *sub; 3633 bfd_size_type trsize, drsize; 3634 size_t max_contents_size; 3635 size_t max_relocs_size; 3636 size_t max_sym_count; 3637 bfd_size_type text_size; 3638 file_ptr text_end; 3639 register struct bfd_link_order *p; 3640 asection *o; 3641 boolean have_link_order_relocs; 3642 3643 if (info->shared) 3644 abfd->flags |= DYNAMIC; 3645 3646 aout_info.info = info; 3647 aout_info.output_bfd = abfd; 3648 aout_info.contents = NULL; 3649 aout_info.relocs = NULL; 3650 aout_info.symbol_map = NULL; 3651 aout_info.output_syms = NULL; 3652 3653 if (! bfd_hash_table_init_n (&aout_info.includes.root, 3654 aout_link_includes_newfunc, 3655 251)) 3656 goto error_return; 3657 includes_hash_initialized = true; 3658 3659 /* Figure out the largest section size. Also, if generating 3660 relocateable output, count the relocs. */ 3661 trsize = 0; 3662 drsize = 0; 3663 max_contents_size = 0; 3664 max_relocs_size = 0; 3665 max_sym_count = 0; 3666 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 3667 { 3668 size_t sz; 3669 3670 if (info->relocateable) 3671 { 3672 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 3673 { 3674 trsize += exec_hdr (sub)->a_trsize; 3675 drsize += exec_hdr (sub)->a_drsize; 3676 } 3677 else 3678 { 3679 /* FIXME: We need to identify the .text and .data sections 3680 and call get_reloc_upper_bound and canonicalize_reloc to 3681 work out the number of relocs needed, and then multiply 3682 by the reloc size. */ 3683 (*_bfd_error_handler) 3684 (_("%s: relocateable link from %s to %s not supported"), 3685 bfd_get_filename (abfd), 3686 sub->xvec->name, abfd->xvec->name); 3687 bfd_set_error (bfd_error_invalid_operation); 3688 goto error_return; 3689 } 3690 } 3691 3692 if (bfd_get_flavour (sub) == bfd_target_aout_flavour) 3693 { 3694 sz = bfd_section_size (sub, obj_textsec (sub)); 3695 if (sz > max_contents_size) 3696 max_contents_size = sz; 3697 sz = bfd_section_size (sub, obj_datasec (sub)); 3698 if (sz > max_contents_size) 3699 max_contents_size = sz; 3700 3701 sz = exec_hdr (sub)->a_trsize; 3702 if (sz > max_relocs_size) 3703 max_relocs_size = sz; 3704 sz = exec_hdr (sub)->a_drsize; 3705 if (sz > max_relocs_size) 3706 max_relocs_size = sz; 3707 3708 sz = obj_aout_external_sym_count (sub); 3709 if (sz > max_sym_count) 3710 max_sym_count = sz; 3711 } 3712 } 3713 3714 if (info->relocateable) 3715 { 3716 if (obj_textsec (abfd) != (asection *) NULL) 3717 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) 3718 ->link_order_head) 3719 * obj_reloc_entry_size (abfd)); 3720 if (obj_datasec (abfd) != (asection *) NULL) 3721 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) 3722 ->link_order_head) 3723 * obj_reloc_entry_size (abfd)); 3724 } 3725 3726 exec_hdr (abfd)->a_trsize = trsize; 3727 exec_hdr (abfd)->a_drsize = drsize; 3728 3729 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 3730 3731 /* Adjust the section sizes and vmas according to the magic number. 3732 This sets a_text, a_data and a_bss in the exec_hdr and sets the 3733 filepos for each section. */ 3734 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) 3735 goto error_return; 3736 3737 /* The relocation and symbol file positions differ among a.out 3738 targets. We are passed a callback routine from the backend 3739 specific code to handle this. 3740 FIXME: At this point we do not know how much space the symbol 3741 table will require. This will not work for any (nonstandard) 3742 a.out target that needs to know the symbol table size before it 3743 can compute the relocation file positions. This may or may not 3744 be the case for the hp300hpux target, for example. */ 3745 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, 3746 &aout_info.symoff); 3747 obj_textsec (abfd)->rel_filepos = aout_info.treloff; 3748 obj_datasec (abfd)->rel_filepos = aout_info.dreloff; 3749 obj_sym_filepos (abfd) = aout_info.symoff; 3750 3751 /* We keep a count of the symbols as we output them. */ 3752 obj_aout_external_sym_count (abfd) = 0; 3753 3754 /* We accumulate the string table as we write out the symbols. */ 3755 aout_info.strtab = _bfd_stringtab_init (); 3756 if (aout_info.strtab == NULL) 3757 goto error_return; 3758 3759 /* Allocate buffers to hold section contents and relocs. */ 3760 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); 3761 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size); 3762 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *)); 3763 aout_info.output_syms = ((struct external_nlist *) 3764 bfd_malloc ((max_sym_count + 1) 3765 * sizeof (struct external_nlist))); 3766 if ((aout_info.contents == NULL && max_contents_size != 0) 3767 || (aout_info.relocs == NULL && max_relocs_size != 0) 3768 || (aout_info.symbol_map == NULL && max_sym_count != 0) 3769 || aout_info.output_syms == NULL) 3770 goto error_return; 3771 3772 /* If we have a symbol named __DYNAMIC, force it out now. This is 3773 required by SunOS. Doing this here rather than in sunos.c is a 3774 hack, but it's easier than exporting everything which would be 3775 needed. */ 3776 { 3777 struct aout_link_hash_entry *h; 3778 3779 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", 3780 false, false, false); 3781 if (h != NULL) 3782 aout_link_write_other_symbol (h, &aout_info); 3783 } 3784 3785 /* The most time efficient way to do the link would be to read all 3786 the input object files into memory and then sort out the 3787 information into the output file. Unfortunately, that will 3788 probably use too much memory. Another method would be to step 3789 through everything that composes the text section and write it 3790 out, and then everything that composes the data section and write 3791 it out, and then write out the relocs, and then write out the 3792 symbols. Unfortunately, that requires reading stuff from each 3793 input file several times, and we will not be able to keep all the 3794 input files open simultaneously, and reopening them will be slow. 3795 3796 What we do is basically process one input file at a time. We do 3797 everything we need to do with an input file once--copy over the 3798 section contents, handle the relocation information, and write 3799 out the symbols--and then we throw away the information we read 3800 from it. This approach requires a lot of lseeks of the output 3801 file, which is unfortunate but still faster than reopening a lot 3802 of files. 3803 3804 We use the output_has_begun field of the input BFDs to see 3805 whether we have already handled it. */ 3806 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next) 3807 sub->output_has_begun = false; 3808 3809 /* Mark all sections which are to be included in the link. This 3810 will normally be every section. We need to do this so that we 3811 can identify any sections which the linker has decided to not 3812 include. */ 3813 for (o = abfd->sections; o != NULL; o = o->next) 3814 { 3815 for (p = o->link_order_head; p != NULL; p = p->next) 3816 { 3817 if (p->type == bfd_indirect_link_order) 3818 p->u.indirect.section->linker_mark = true; 3819 } 3820 } 3821 3822 have_link_order_relocs = false; 3823 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 3824 { 3825 for (p = o->link_order_head; 3826 p != (struct bfd_link_order *) NULL; 3827 p = p->next) 3828 { 3829 if (p->type == bfd_indirect_link_order 3830 && (bfd_get_flavour (p->u.indirect.section->owner) 3831 == bfd_target_aout_flavour)) 3832 { 3833 bfd *input_bfd; 3834 3835 input_bfd = p->u.indirect.section->owner; 3836 if (! input_bfd->output_has_begun) 3837 { 3838 if (! aout_link_input_bfd (&aout_info, input_bfd)) 3839 goto error_return; 3840 input_bfd->output_has_begun = true; 3841 } 3842 } 3843 else if (p->type == bfd_section_reloc_link_order 3844 || p->type == bfd_symbol_reloc_link_order) 3845 { 3846 /* These are handled below. */ 3847 have_link_order_relocs = true; 3848 } 3849 else 3850 { 3851 if (! _bfd_default_link_order (abfd, info, o, p)) 3852 goto error_return; 3853 } 3854 } 3855 } 3856 3857 /* Write out any symbols that we have not already written out. */ 3858 aout_link_hash_traverse (aout_hash_table (info), 3859 aout_link_write_other_symbol, 3860 (PTR) &aout_info); 3861 3862 /* Now handle any relocs we were asked to create by the linker. 3863 These did not come from any input file. We must do these after 3864 we have written out all the symbols, so that we know the symbol 3865 indices to use. */ 3866 if (have_link_order_relocs) 3867 { 3868 for (o = abfd->sections; o != (asection *) NULL; o = o->next) 3869 { 3870 for (p = o->link_order_head; 3871 p != (struct bfd_link_order *) NULL; 3872 p = p->next) 3873 { 3874 if (p->type == bfd_section_reloc_link_order 3875 || p->type == bfd_symbol_reloc_link_order) 3876 { 3877 if (! aout_link_reloc_link_order (&aout_info, o, p)) 3878 goto error_return; 3879 } 3880 } 3881 } 3882 } 3883 3884 if (aout_info.contents != NULL) 3885 { 3886 free (aout_info.contents); 3887 aout_info.contents = NULL; 3888 } 3889 if (aout_info.relocs != NULL) 3890 { 3891 free (aout_info.relocs); 3892 aout_info.relocs = NULL; 3893 } 3894 if (aout_info.symbol_map != NULL) 3895 { 3896 free (aout_info.symbol_map); 3897 aout_info.symbol_map = NULL; 3898 } 3899 if (aout_info.output_syms != NULL) 3900 { 3901 free (aout_info.output_syms); 3902 aout_info.output_syms = NULL; 3903 } 3904 if (includes_hash_initialized) 3905 { 3906 bfd_hash_table_free (&aout_info.includes.root); 3907 includes_hash_initialized = false; 3908 } 3909 3910 /* Finish up any dynamic linking we may be doing. */ 3911 if (aout_backend_info (abfd)->finish_dynamic_link != NULL) 3912 { 3913 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) 3914 goto error_return; 3915 } 3916 3917 /* Update the header information. */ 3918 abfd->symcount = obj_aout_external_sym_count (abfd); 3919 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; 3920 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; 3921 obj_textsec (abfd)->reloc_count = 3922 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); 3923 obj_datasec (abfd)->reloc_count = 3924 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); 3925 3926 /* Write out the string table, unless there are no symbols. */ 3927 if (abfd->symcount > 0) 3928 { 3929 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 3930 || ! emit_stringtab (abfd, aout_info.strtab)) 3931 goto error_return; 3932 } 3933 else if (obj_textsec (abfd)->reloc_count == 0 3934 && obj_datasec (abfd)->reloc_count == 0) 3935 { 3936 bfd_byte b; 3937 3938 b = 0; 3939 if (bfd_seek (abfd, 3940 (obj_datasec (abfd)->filepos 3941 + exec_hdr (abfd)->a_data 3942 - 1), 3943 SEEK_SET) != 0 3944 || bfd_write (&b, 1, 1, abfd) != 1) 3945 goto error_return; 3946 } 3947 3948 return true; 3949 3950 error_return: 3951 if (aout_info.contents != NULL) 3952 free (aout_info.contents); 3953 if (aout_info.relocs != NULL) 3954 free (aout_info.relocs); 3955 if (aout_info.symbol_map != NULL) 3956 free (aout_info.symbol_map); 3957 if (aout_info.output_syms != NULL) 3958 free (aout_info.output_syms); 3959 if (includes_hash_initialized) 3960 bfd_hash_table_free (&aout_info.includes.root); 3961 return false; 3962} 3963 3964/* Link an a.out input BFD into the output file. */ 3965 3966static boolean 3967aout_link_input_bfd (finfo, input_bfd) 3968 struct aout_final_link_info *finfo; 3969 bfd *input_bfd; 3970{ 3971 bfd_size_type sym_count; 3972 3973 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); 3974 3975 /* If this is a dynamic object, it may need special handling. */ 3976 if ((input_bfd->flags & DYNAMIC) != 0 3977 && aout_backend_info (input_bfd)->link_dynamic_object != NULL) 3978 { 3979 return ((*aout_backend_info (input_bfd)->link_dynamic_object) 3980 (finfo->info, input_bfd)); 3981 } 3982 3983 /* Get the symbols. We probably have them already, unless 3984 finfo->info->keep_memory is false. */ 3985 if (! aout_get_external_symbols (input_bfd)) 3986 return false; 3987 3988 sym_count = obj_aout_external_sym_count (input_bfd); 3989 3990 /* Write out the symbols and get a map of the new indices. The map 3991 is placed into finfo->symbol_map. */ 3992 if (! aout_link_write_symbols (finfo, input_bfd)) 3993 return false; 3994 3995 /* Relocate and write out the sections. These functions use the 3996 symbol map created by aout_link_write_symbols. The linker_mark 3997 field will be set if these sections are to be included in the 3998 link, which will normally be the case. */ 3999 if (obj_textsec (input_bfd)->linker_mark) 4000 { 4001 if (! aout_link_input_section (finfo, input_bfd, 4002 obj_textsec (input_bfd), 4003 &finfo->treloff, 4004 exec_hdr (input_bfd)->a_trsize)) 4005 return false; 4006 } 4007 if (obj_datasec (input_bfd)->linker_mark) 4008 { 4009 if (! aout_link_input_section (finfo, input_bfd, 4010 obj_datasec (input_bfd), 4011 &finfo->dreloff, 4012 exec_hdr (input_bfd)->a_drsize)) 4013 return false; 4014 } 4015 4016 /* If we are not keeping memory, we don't need the symbols any 4017 longer. We still need them if we are keeping memory, because the 4018 strings in the hash table point into them. */ 4019 if (! finfo->info->keep_memory) 4020 { 4021 if (! aout_link_free_symbols (input_bfd)) 4022 return false; 4023 } 4024 4025 return true; 4026} 4027 4028/* Adjust and write out the symbols for an a.out file. Set the new 4029 symbol indices into a symbol_map. */ 4030 4031static boolean 4032aout_link_write_symbols (finfo, input_bfd) 4033 struct aout_final_link_info *finfo; 4034 bfd *input_bfd; 4035{ 4036 bfd *output_bfd; 4037 bfd_size_type sym_count; 4038 char *strings; 4039 enum bfd_link_strip strip; 4040 enum bfd_link_discard discard; 4041 struct external_nlist *outsym; 4042 bfd_size_type strtab_index; 4043 register struct external_nlist *sym; 4044 struct external_nlist *sym_end; 4045 struct aout_link_hash_entry **sym_hash; 4046 int *symbol_map; 4047 boolean pass; 4048 boolean skip_next; 4049 4050 output_bfd = finfo->output_bfd; 4051 sym_count = obj_aout_external_sym_count (input_bfd); 4052 strings = obj_aout_external_strings (input_bfd); 4053 strip = finfo->info->strip; 4054 discard = finfo->info->discard; 4055 outsym = finfo->output_syms; 4056 4057 /* First write out a symbol for this object file, unless we are 4058 discarding such symbols. */ 4059 if (strip != strip_all 4060 && (strip != strip_some 4061 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, 4062 false, false) != NULL) 4063 && discard != discard_all) 4064 { 4065 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type); 4066 bfd_h_put_8 (output_bfd, 0, outsym->e_other); 4067 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc); 4068 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4069 input_bfd->filename, false); 4070 if (strtab_index == (bfd_size_type) -1) 4071 return false; 4072 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4073 PUT_WORD (output_bfd, 4074 (bfd_get_section_vma (output_bfd, 4075 obj_textsec (input_bfd)->output_section) 4076 + obj_textsec (input_bfd)->output_offset), 4077 outsym->e_value); 4078 ++obj_aout_external_sym_count (output_bfd); 4079 ++outsym; 4080 } 4081 4082 pass = false; 4083 skip_next = false; 4084 sym = obj_aout_external_syms (input_bfd); 4085 sym_end = sym + sym_count; 4086 sym_hash = obj_aout_sym_hashes (input_bfd); 4087 symbol_map = finfo->symbol_map; 4088 memset (symbol_map, 0, sym_count * sizeof *symbol_map); 4089 for (; sym < sym_end; sym++, sym_hash++, symbol_map++) 4090 { 4091 const char *name; 4092 int type; 4093 struct aout_link_hash_entry *h; 4094 boolean skip; 4095 asection *symsec; 4096 bfd_vma val = 0; 4097 boolean copy; 4098 4099 /* We set *symbol_map to 0 above for all symbols. If it has 4100 already been set to -1 for this symbol, it means that we are 4101 discarding it because it appears in a duplicate header file. 4102 See the N_BINCL code below. */ 4103 if (*symbol_map == -1) 4104 continue; 4105 4106 /* Initialize *symbol_map to -1, which means that the symbol was 4107 not copied into the output file. We will change it later if 4108 we do copy the symbol over. */ 4109 *symbol_map = -1; 4110 4111 type = bfd_h_get_8 (input_bfd, sym->e_type); 4112 name = strings + GET_WORD (input_bfd, sym->e_strx); 4113 4114 h = NULL; 4115 4116 if (pass) 4117 { 4118 /* Pass this symbol through. It is the target of an 4119 indirect or warning symbol. */ 4120 val = GET_WORD (input_bfd, sym->e_value); 4121 pass = false; 4122 } 4123 else if (skip_next) 4124 { 4125 /* Skip this symbol, which is the target of an indirect 4126 symbol that we have changed to no longer be an indirect 4127 symbol. */ 4128 skip_next = false; 4129 continue; 4130 } 4131 else 4132 { 4133 struct aout_link_hash_entry *hresolve; 4134 4135 /* We have saved the hash table entry for this symbol, if 4136 there is one. Note that we could just look it up again 4137 in the hash table, provided we first check that it is an 4138 external symbol. */ 4139 h = *sym_hash; 4140 4141 /* Use the name from the hash table, in case the symbol was 4142 wrapped. */ 4143 if (h != NULL) 4144 name = h->root.root.string; 4145 4146 /* If this is an indirect or warning symbol, then change 4147 hresolve to the base symbol. We also change *sym_hash so 4148 that the relocation routines relocate against the real 4149 symbol. */ 4150 hresolve = h; 4151 if (h != (struct aout_link_hash_entry *) NULL 4152 && (h->root.type == bfd_link_hash_indirect 4153 || h->root.type == bfd_link_hash_warning)) 4154 { 4155 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; 4156 while (hresolve->root.type == bfd_link_hash_indirect 4157 || hresolve->root.type == bfd_link_hash_warning) 4158 hresolve = ((struct aout_link_hash_entry *) 4159 hresolve->root.u.i.link); 4160 *sym_hash = hresolve; 4161 } 4162 4163 /* If the symbol has already been written out, skip it. */ 4164 if (h != (struct aout_link_hash_entry *) NULL 4165 && h->root.type != bfd_link_hash_warning 4166 && h->written) 4167 { 4168 if ((type & N_TYPE) == N_INDR 4169 || type == N_WARNING) 4170 skip_next = true; 4171 *symbol_map = h->indx; 4172 continue; 4173 } 4174 4175 /* See if we are stripping this symbol. */ 4176 skip = false; 4177 switch (strip) 4178 { 4179 case strip_none: 4180 break; 4181 case strip_debugger: 4182 if ((type & N_STAB) != 0) 4183 skip = true; 4184 break; 4185 case strip_some: 4186 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) 4187 == NULL) 4188 skip = true; 4189 break; 4190 case strip_all: 4191 skip = true; 4192 break; 4193 } 4194 if (skip) 4195 { 4196 if (h != (struct aout_link_hash_entry *) NULL) 4197 h->written = true; 4198 continue; 4199 } 4200 4201 /* Get the value of the symbol. */ 4202 if ((type & N_TYPE) == N_TEXT 4203 || type == N_WEAKT) 4204 symsec = obj_textsec (input_bfd); 4205 else if ((type & N_TYPE) == N_DATA 4206 || type == N_WEAKD) 4207 symsec = obj_datasec (input_bfd); 4208 else if ((type & N_TYPE) == N_BSS 4209 || type == N_WEAKB) 4210 symsec = obj_bsssec (input_bfd); 4211 else if ((type & N_TYPE) == N_ABS 4212 || type == N_WEAKA) 4213 symsec = bfd_abs_section_ptr; 4214 else if (((type & N_TYPE) == N_INDR 4215 && (hresolve == (struct aout_link_hash_entry *) NULL 4216 || (hresolve->root.type != bfd_link_hash_defined 4217 && hresolve->root.type != bfd_link_hash_defweak 4218 && hresolve->root.type != bfd_link_hash_common))) 4219 || type == N_WARNING) 4220 { 4221 /* Pass the next symbol through unchanged. The 4222 condition above for indirect symbols is so that if 4223 the indirect symbol was defined, we output it with 4224 the correct definition so the debugger will 4225 understand it. */ 4226 pass = true; 4227 val = GET_WORD (input_bfd, sym->e_value); 4228 symsec = NULL; 4229 } 4230 else if ((type & N_STAB) != 0) 4231 { 4232 val = GET_WORD (input_bfd, sym->e_value); 4233 symsec = NULL; 4234 } 4235 else 4236 { 4237 /* If we get here with an indirect symbol, it means that 4238 we are outputting it with a real definition. In such 4239 a case we do not want to output the next symbol, 4240 which is the target of the indirection. */ 4241 if ((type & N_TYPE) == N_INDR) 4242 skip_next = true; 4243 4244 symsec = NULL; 4245 4246 /* We need to get the value from the hash table. We use 4247 hresolve so that if we have defined an indirect 4248 symbol we output the final definition. */ 4249 if (h == (struct aout_link_hash_entry *) NULL) 4250 { 4251 switch (type & N_TYPE) 4252 { 4253 case N_SETT: 4254 symsec = obj_textsec (input_bfd); 4255 break; 4256 case N_SETD: 4257 symsec = obj_datasec (input_bfd); 4258 break; 4259 case N_SETB: 4260 symsec = obj_bsssec (input_bfd); 4261 break; 4262 case N_SETA: 4263 symsec = bfd_abs_section_ptr; 4264 break; 4265 default: 4266 val = 0; 4267 break; 4268 } 4269 } 4270 else if (hresolve->root.type == bfd_link_hash_defined 4271 || hresolve->root.type == bfd_link_hash_defweak) 4272 { 4273 asection *input_section; 4274 asection *output_section; 4275 4276 /* This case usually means a common symbol which was 4277 turned into a defined symbol. */ 4278 input_section = hresolve->root.u.def.section; 4279 output_section = input_section->output_section; 4280 BFD_ASSERT (bfd_is_abs_section (output_section) 4281 || output_section->owner == output_bfd); 4282 val = (hresolve->root.u.def.value 4283 + bfd_get_section_vma (output_bfd, output_section) 4284 + input_section->output_offset); 4285 4286 /* Get the correct type based on the section. If 4287 this is a constructed set, force it to be 4288 globally visible. */ 4289 if (type == N_SETT 4290 || type == N_SETD 4291 || type == N_SETB 4292 || type == N_SETA) 4293 type |= N_EXT; 4294 4295 type &=~ N_TYPE; 4296 4297 if (output_section == obj_textsec (output_bfd)) 4298 type |= (hresolve->root.type == bfd_link_hash_defined 4299 ? N_TEXT 4300 : N_WEAKT); 4301 else if (output_section == obj_datasec (output_bfd)) 4302 type |= (hresolve->root.type == bfd_link_hash_defined 4303 ? N_DATA 4304 : N_WEAKD); 4305 else if (output_section == obj_bsssec (output_bfd)) 4306 type |= (hresolve->root.type == bfd_link_hash_defined 4307 ? N_BSS 4308 : N_WEAKB); 4309 else 4310 type |= (hresolve->root.type == bfd_link_hash_defined 4311 ? N_ABS 4312 : N_WEAKA); 4313 } 4314 else if (hresolve->root.type == bfd_link_hash_common) 4315 val = hresolve->root.u.c.size; 4316 else if (hresolve->root.type == bfd_link_hash_undefweak) 4317 { 4318 val = 0; 4319 type = N_WEAKU; 4320 } 4321 else 4322 val = 0; 4323 } 4324 if (symsec != (asection *) NULL) 4325 val = (symsec->output_section->vma 4326 + symsec->output_offset 4327 + (GET_WORD (input_bfd, sym->e_value) 4328 - symsec->vma)); 4329 4330 /* If this is a global symbol set the written flag, and if 4331 it is a local symbol see if we should discard it. */ 4332 if (h != (struct aout_link_hash_entry *) NULL) 4333 { 4334 h->written = true; 4335 h->indx = obj_aout_external_sym_count (output_bfd); 4336 } 4337 else if ((type & N_TYPE) != N_SETT 4338 && (type & N_TYPE) != N_SETD 4339 && (type & N_TYPE) != N_SETB 4340 && (type & N_TYPE) != N_SETA) 4341 { 4342 switch (discard) 4343 { 4344 case discard_none: 4345 break; 4346 case discard_l: 4347 if ((type & N_STAB) == 0 4348 && bfd_is_local_label_name (input_bfd, name)) 4349 skip = true; 4350 break; 4351 case discard_all: 4352 skip = true; 4353 break; 4354 } 4355 if (skip) 4356 { 4357 pass = false; 4358 continue; 4359 } 4360 } 4361 4362 /* An N_BINCL symbol indicates the start of the stabs 4363 entries for a header file. We need to scan ahead to the 4364 next N_EINCL symbol, ignoring nesting, adding up all the 4365 characters in the symbol names, not including the file 4366 numbers in types (the first number after an open 4367 parenthesis). */ 4368 if (type == N_BINCL) 4369 { 4370 struct external_nlist *incl_sym; 4371 int nest; 4372 struct aout_link_includes_entry *incl_entry; 4373 struct aout_link_includes_totals *t; 4374 4375 val = 0; 4376 nest = 0; 4377 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) 4378 { 4379 int incl_type; 4380 4381 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); 4382 if (incl_type == N_EINCL) 4383 { 4384 if (nest == 0) 4385 break; 4386 --nest; 4387 } 4388 else if (incl_type == N_BINCL) 4389 ++nest; 4390 else if (nest == 0) 4391 { 4392 const char *s; 4393 4394 s = strings + GET_WORD (input_bfd, incl_sym->e_strx); 4395 for (; *s != '\0'; s++) 4396 { 4397 val += *s; 4398 if (*s == '(') 4399 { 4400 /* Skip the file number. */ 4401 ++s; 4402 while (isdigit ((unsigned char) *s)) 4403 ++s; 4404 --s; 4405 } 4406 } 4407 } 4408 } 4409 4410 /* If we have already included a header file with the 4411 same value, then replace this one with an N_EXCL 4412 symbol. */ 4413 copy = ! finfo->info->keep_memory; 4414 incl_entry = aout_link_includes_lookup (&finfo->includes, 4415 name, true, copy); 4416 if (incl_entry == NULL) 4417 return false; 4418 for (t = incl_entry->totals; t != NULL; t = t->next) 4419 if (t->total == val) 4420 break; 4421 if (t == NULL) 4422 { 4423 /* This is the first time we have seen this header 4424 file with this set of stabs strings. */ 4425 t = ((struct aout_link_includes_totals *) 4426 bfd_hash_allocate (&finfo->includes.root, 4427 sizeof *t)); 4428 if (t == NULL) 4429 return false; 4430 t->total = val; 4431 t->next = incl_entry->totals; 4432 incl_entry->totals = t; 4433 } 4434 else 4435 { 4436 int *incl_map; 4437 4438 /* This is a duplicate header file. We must change 4439 it to be an N_EXCL entry, and mark all the 4440 included symbols to prevent outputting them. */ 4441 type = N_EXCL; 4442 4443 nest = 0; 4444 for (incl_sym = sym + 1, incl_map = symbol_map + 1; 4445 incl_sym < sym_end; 4446 incl_sym++, incl_map++) 4447 { 4448 int incl_type; 4449 4450 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); 4451 if (incl_type == N_EINCL) 4452 { 4453 if (nest == 0) 4454 { 4455 *incl_map = -1; 4456 break; 4457 } 4458 --nest; 4459 } 4460 else if (incl_type == N_BINCL) 4461 ++nest; 4462 else if (nest == 0) 4463 *incl_map = -1; 4464 } 4465 } 4466 } 4467 } 4468 4469 /* Copy this symbol into the list of symbols we are going to 4470 write out. */ 4471 bfd_h_put_8 (output_bfd, type, outsym->e_type); 4472 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other), 4473 outsym->e_other); 4474 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc), 4475 outsym->e_desc); 4476 copy = false; 4477 if (! finfo->info->keep_memory) 4478 { 4479 /* name points into a string table which we are going to 4480 free. If there is a hash table entry, use that string. 4481 Otherwise, copy name into memory. */ 4482 if (h != (struct aout_link_hash_entry *) NULL) 4483 name = h->root.root.string; 4484 else 4485 copy = true; 4486 } 4487 strtab_index = add_to_stringtab (output_bfd, finfo->strtab, 4488 name, copy); 4489 if (strtab_index == (bfd_size_type) -1) 4490 return false; 4491 PUT_WORD (output_bfd, strtab_index, outsym->e_strx); 4492 PUT_WORD (output_bfd, val, outsym->e_value); 4493 *symbol_map = obj_aout_external_sym_count (output_bfd); 4494 ++obj_aout_external_sym_count (output_bfd); 4495 ++outsym; 4496 } 4497 4498 /* Write out the output symbols we have just constructed. */ 4499 if (outsym > finfo->output_syms) 4500 { 4501 bfd_size_type outsym_count; 4502 4503 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) 4504 return false; 4505 outsym_count = outsym - finfo->output_syms; 4506 if (bfd_write ((PTR) finfo->output_syms, 4507 (bfd_size_type) EXTERNAL_NLIST_SIZE, 4508 (bfd_size_type) outsym_count, output_bfd) 4509 != outsym_count * EXTERNAL_NLIST_SIZE) 4510 return false; 4511 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE; 4512 } 4513 4514 return true; 4515} 4516 4517/* Write out a symbol that was not associated with an a.out input 4518 object. */ 4519 4520static boolean 4521aout_link_write_other_symbol (h, data) 4522 struct aout_link_hash_entry *h; 4523 PTR data; 4524{ 4525 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; 4526 bfd *output_bfd; 4527 int type; 4528 bfd_vma val; 4529 struct external_nlist outsym; 4530 bfd_size_type indx; 4531 4532 output_bfd = finfo->output_bfd; 4533 4534 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) 4535 { 4536 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) 4537 (output_bfd, finfo->info, h))) 4538 { 4539 /* FIXME: No way to handle errors. */ 4540 abort (); 4541 } 4542 } 4543 4544 if (h->written) 4545 return true; 4546 4547 h->written = true; 4548 4549 /* An indx of -2 means the symbol must be written. */ 4550 if (h->indx != -2 4551 && (finfo->info->strip == strip_all 4552 || (finfo->info->strip == strip_some 4553 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, 4554 false, false) == NULL))) 4555 return true; 4556 4557 switch (h->root.type) 4558 { 4559 default: 4560 abort (); 4561 /* Avoid variable not initialized warnings. */ 4562 return true; 4563 case bfd_link_hash_new: 4564 /* This can happen for set symbols when sets are not being 4565 built. */ 4566 return true; 4567 case bfd_link_hash_undefined: 4568 type = N_UNDF | N_EXT; 4569 val = 0; 4570 break; 4571 case bfd_link_hash_defined: 4572 case bfd_link_hash_defweak: 4573 { 4574 asection *sec; 4575 4576 sec = h->root.u.def.section->output_section; 4577 BFD_ASSERT (bfd_is_abs_section (sec) 4578 || sec->owner == output_bfd); 4579 if (sec == obj_textsec (output_bfd)) 4580 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; 4581 else if (sec == obj_datasec (output_bfd)) 4582 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; 4583 else if (sec == obj_bsssec (output_bfd)) 4584 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; 4585 else 4586 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; 4587 type |= N_EXT; 4588 val = (h->root.u.def.value 4589 + sec->vma 4590 + h->root.u.def.section->output_offset); 4591 } 4592 break; 4593 case bfd_link_hash_common: 4594 type = N_UNDF | N_EXT; 4595 val = h->root.u.c.size; 4596 break; 4597 case bfd_link_hash_undefweak: 4598 type = N_WEAKU; 4599 val = 0; 4600 case bfd_link_hash_indirect: 4601 case bfd_link_hash_warning: 4602 /* FIXME: Ignore these for now. The circumstances under which 4603 they should be written out are not clear to me. */ 4604 return true; 4605 } 4606 4607 bfd_h_put_8 (output_bfd, type, outsym.e_type); 4608 bfd_h_put_8 (output_bfd, 0, outsym.e_other); 4609 bfd_h_put_16 (output_bfd, 0, outsym.e_desc); 4610 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, 4611 false); 4612 if (indx == (bfd_size_type) -1) 4613 { 4614 /* FIXME: No way to handle errors. */ 4615 abort (); 4616 } 4617 PUT_WORD (output_bfd, indx, outsym.e_strx); 4618 PUT_WORD (output_bfd, val, outsym.e_value); 4619 4620 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 4621 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE, 4622 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE) 4623 { 4624 /* FIXME: No way to handle errors. */ 4625 abort (); 4626 } 4627 4628 finfo->symoff += EXTERNAL_NLIST_SIZE; 4629 h->indx = obj_aout_external_sym_count (output_bfd); 4630 ++obj_aout_external_sym_count (output_bfd); 4631 4632 return true; 4633} 4634 4635/* Link an a.out section into the output file. */ 4636 4637static boolean 4638aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr, 4639 rel_size) 4640 struct aout_final_link_info *finfo; 4641 bfd *input_bfd; 4642 asection *input_section; 4643 file_ptr *reloff_ptr; 4644 bfd_size_type rel_size; 4645{ 4646 bfd_size_type input_size; 4647 PTR relocs; 4648 4649 /* Get the section contents. */ 4650 input_size = bfd_section_size (input_bfd, input_section); 4651 if (! bfd_get_section_contents (input_bfd, input_section, 4652 (PTR) finfo->contents, 4653 (file_ptr) 0, input_size)) 4654 return false; 4655 4656 /* Read in the relocs if we haven't already done it. */ 4657 if (aout_section_data (input_section) != NULL 4658 && aout_section_data (input_section)->relocs != NULL) 4659 relocs = aout_section_data (input_section)->relocs; 4660 else 4661 { 4662 relocs = finfo->relocs; 4663 if (rel_size > 0) 4664 { 4665 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 4666 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size) 4667 return false; 4668 } 4669 } 4670 4671 /* Relocate the section contents. */ 4672 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 4673 { 4674 if (! aout_link_input_section_std (finfo, input_bfd, input_section, 4675 (struct reloc_std_external *) relocs, 4676 rel_size, finfo->contents)) 4677 return false; 4678 } 4679 else 4680 { 4681 if (! aout_link_input_section_ext (finfo, input_bfd, input_section, 4682 (struct reloc_ext_external *) relocs, 4683 rel_size, finfo->contents)) 4684 return false; 4685 } 4686 4687 /* Write out the section contents. */ 4688 if (! bfd_set_section_contents (finfo->output_bfd, 4689 input_section->output_section, 4690 (PTR) finfo->contents, 4691 input_section->output_offset, 4692 input_size)) 4693 return false; 4694 4695 /* If we are producing relocateable output, the relocs were 4696 modified, and we now write them out. */ 4697 if (finfo->info->relocateable && rel_size > 0) 4698 { 4699 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) 4700 return false; 4701 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd) 4702 != rel_size) 4703 return false; 4704 *reloff_ptr += rel_size; 4705 4706 /* Assert that the relocs have not run into the symbols, and 4707 that if these are the text relocs they have not run into the 4708 data relocs. */ 4709 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 4710 && (reloff_ptr != &finfo->treloff 4711 || (*reloff_ptr 4712 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 4713 } 4714 4715 return true; 4716} 4717 4718/* Get the section corresponding to a reloc index. */ 4719 4720static INLINE asection * 4721aout_reloc_index_to_section (abfd, indx) 4722 bfd *abfd; 4723 int indx; 4724{ 4725 switch (indx & N_TYPE) 4726 { 4727 case N_TEXT: 4728 return obj_textsec (abfd); 4729 case N_DATA: 4730 return obj_datasec (abfd); 4731 case N_BSS: 4732 return obj_bsssec (abfd); 4733 case N_ABS: 4734 case N_UNDF: 4735 return bfd_abs_section_ptr; 4736 default: 4737 abort (); 4738 } 4739 /*NOTREACHED*/ 4740 return NULL; 4741} 4742 4743/* Relocate an a.out section using standard a.out relocs. */ 4744 4745static boolean 4746aout_link_input_section_std (finfo, input_bfd, input_section, relocs, 4747 rel_size, contents) 4748 struct aout_final_link_info *finfo; 4749 bfd *input_bfd; 4750 asection *input_section; 4751 struct reloc_std_external *relocs; 4752 bfd_size_type rel_size; 4753 bfd_byte *contents; 4754{ 4755 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, 4756 bfd *, asection *, 4757 struct aout_link_hash_entry *, 4758 PTR, bfd_byte *, boolean *, 4759 bfd_vma *)); 4760 bfd *output_bfd; 4761 boolean relocateable; 4762 struct external_nlist *syms; 4763 char *strings; 4764 struct aout_link_hash_entry **sym_hashes; 4765 int *symbol_map; 4766 bfd_size_type reloc_count; 4767 register struct reloc_std_external *rel; 4768 struct reloc_std_external *rel_end; 4769 4770 output_bfd = finfo->output_bfd; 4771 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 4772 4773 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); 4774 BFD_ASSERT (input_bfd->xvec->header_byteorder 4775 == output_bfd->xvec->header_byteorder); 4776 4777 relocateable = finfo->info->relocateable; 4778 syms = obj_aout_external_syms (input_bfd); 4779 strings = obj_aout_external_strings (input_bfd); 4780 sym_hashes = obj_aout_sym_hashes (input_bfd); 4781 symbol_map = finfo->symbol_map; 4782 4783 reloc_count = rel_size / RELOC_STD_SIZE; 4784 rel = relocs; 4785 rel_end = rel + reloc_count; 4786 for (; rel < rel_end; rel++) 4787 { 4788 bfd_vma r_addr; 4789 int r_index; 4790 int r_extern; 4791 int r_pcrel; 4792 int r_baserel = 0; 4793 reloc_howto_type *howto; 4794 struct aout_link_hash_entry *h = NULL; 4795 bfd_vma relocation; 4796 bfd_reloc_status_type r; 4797 4798 r_addr = GET_SWORD (input_bfd, rel->r_address); 4799 4800#ifdef MY_reloc_howto 4801 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel); 4802#else 4803 { 4804 int r_jmptable; 4805 int r_relative; 4806 int r_length; 4807 unsigned int howto_idx; 4808 4809 if (bfd_header_big_endian (input_bfd)) 4810 { 4811 r_index = ((rel->r_index[0] << 16) 4812 | (rel->r_index[1] << 8) 4813 | rel->r_index[2]); 4814 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); 4815 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 4816 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 4817 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 4818 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); 4819 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) 4820 >> RELOC_STD_BITS_LENGTH_SH_BIG); 4821 } 4822 else 4823 { 4824 r_index = ((rel->r_index[2] << 16) 4825 | (rel->r_index[1] << 8) 4826 | rel->r_index[0]); 4827 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); 4828 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 4829 r_baserel = (0 != (rel->r_type[0] 4830 & RELOC_STD_BITS_BASEREL_LITTLE)); 4831 r_jmptable= (0 != (rel->r_type[0] 4832 & RELOC_STD_BITS_JMPTABLE_LITTLE)); 4833 r_relative= (0 != (rel->r_type[0] 4834 & RELOC_STD_BITS_RELATIVE_LITTLE)); 4835 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) 4836 >> RELOC_STD_BITS_LENGTH_SH_LITTLE); 4837 } 4838 4839 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel 4840 + 16 * r_jmptable + 32 * r_relative); 4841 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); 4842 howto = howto_table_std + howto_idx; 4843 } 4844#endif 4845 4846 if (relocateable) 4847 { 4848 /* We are generating a relocateable output file, and must 4849 modify the reloc accordingly. */ 4850 if (r_extern) 4851 { 4852 /* If we know the symbol this relocation is against, 4853 convert it into a relocation against a section. This 4854 is what the native linker does. */ 4855 h = sym_hashes[r_index]; 4856 if (h != (struct aout_link_hash_entry *) NULL 4857 && (h->root.type == bfd_link_hash_defined 4858 || h->root.type == bfd_link_hash_defweak)) 4859 { 4860 asection *output_section; 4861 4862 /* Change the r_extern value. */ 4863 if (bfd_header_big_endian (output_bfd)) 4864 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; 4865 else 4866 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; 4867 4868 /* Compute a new r_index. */ 4869 output_section = h->root.u.def.section->output_section; 4870 if (output_section == obj_textsec (output_bfd)) 4871 r_index = N_TEXT; 4872 else if (output_section == obj_datasec (output_bfd)) 4873 r_index = N_DATA; 4874 else if (output_section == obj_bsssec (output_bfd)) 4875 r_index = N_BSS; 4876 else 4877 r_index = N_ABS; 4878 4879 /* Add the symbol value and the section VMA to the 4880 addend stored in the contents. */ 4881 relocation = (h->root.u.def.value 4882 + output_section->vma 4883 + h->root.u.def.section->output_offset); 4884 } 4885 else 4886 { 4887 /* We must change r_index according to the symbol 4888 map. */ 4889 r_index = symbol_map[r_index]; 4890 4891 if (r_index == -1) 4892 { 4893 if (h != NULL) 4894 { 4895 /* We decided to strip this symbol, but it 4896 turns out that we can't. Note that we 4897 lose the other and desc information here. 4898 I don't think that will ever matter for a 4899 global symbol. */ 4900 if (h->indx < 0) 4901 { 4902 h->indx = -2; 4903 h->written = false; 4904 if (! aout_link_write_other_symbol (h, 4905 (PTR) finfo)) 4906 return false; 4907 } 4908 r_index = h->indx; 4909 } 4910 else 4911 { 4912 const char *name; 4913 4914 name = strings + GET_WORD (input_bfd, 4915 syms[r_index].e_strx); 4916 if (! ((*finfo->info->callbacks->unattached_reloc) 4917 (finfo->info, name, input_bfd, input_section, 4918 r_addr))) 4919 return false; 4920 r_index = 0; 4921 } 4922 } 4923 4924 relocation = 0; 4925 } 4926 4927 /* Write out the new r_index value. */ 4928 if (bfd_header_big_endian (output_bfd)) 4929 { 4930 rel->r_index[0] = r_index >> 16; 4931 rel->r_index[1] = r_index >> 8; 4932 rel->r_index[2] = r_index; 4933 } 4934 else 4935 { 4936 rel->r_index[2] = r_index >> 16; 4937 rel->r_index[1] = r_index >> 8; 4938 rel->r_index[0] = r_index; 4939 } 4940 } 4941 else 4942 { 4943 asection *section; 4944 4945 /* This is a relocation against a section. We must 4946 adjust by the amount that the section moved. */ 4947 section = aout_reloc_index_to_section (input_bfd, r_index); 4948 relocation = (section->output_section->vma 4949 + section->output_offset 4950 - section->vma); 4951 } 4952 4953 /* Change the address of the relocation. */ 4954 PUT_WORD (output_bfd, 4955 r_addr + input_section->output_offset, 4956 rel->r_address); 4957 4958 /* Adjust a PC relative relocation by removing the reference 4959 to the original address in the section and including the 4960 reference to the new address. */ 4961 if (r_pcrel) 4962 relocation -= (input_section->output_section->vma 4963 + input_section->output_offset 4964 - input_section->vma); 4965 4966#ifdef MY_relocatable_reloc 4967 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); 4968#endif 4969 4970 if (relocation == 0) 4971 r = bfd_reloc_ok; 4972 else 4973 r = MY_relocate_contents (howto, 4974 input_bfd, relocation, 4975 contents + r_addr); 4976 } 4977 else 4978 { 4979 boolean hundef; 4980 4981 /* We are generating an executable, and must do a full 4982 relocation. */ 4983 hundef = false; 4984 4985 if (r_extern) 4986 { 4987 h = sym_hashes[r_index]; 4988 4989 if (h != (struct aout_link_hash_entry *) NULL 4990 && (h->root.type == bfd_link_hash_defined 4991 || h->root.type == bfd_link_hash_defweak)) 4992 { 4993 relocation = (h->root.u.def.value 4994 + h->root.u.def.section->output_section->vma 4995 + h->root.u.def.section->output_offset); 4996 } 4997 else if (h != (struct aout_link_hash_entry *) NULL 4998 && h->root.type == bfd_link_hash_undefweak) 4999 relocation = 0; 5000 else 5001 { 5002 hundef = true; 5003 relocation = 0; 5004 } 5005 } 5006 else 5007 { 5008 asection *section; 5009 5010 section = aout_reloc_index_to_section (input_bfd, r_index); 5011 relocation = (section->output_section->vma 5012 + section->output_offset 5013 - section->vma); 5014 if (r_pcrel) 5015 relocation += input_section->vma; 5016 } 5017 5018 if (check_dynamic_reloc != NULL) 5019 { 5020 boolean skip; 5021 5022 if (! ((*check_dynamic_reloc) 5023 (finfo->info, input_bfd, input_section, h, 5024 (PTR) rel, contents, &skip, &relocation))) 5025 return false; 5026 if (skip) 5027 continue; 5028 } 5029 5030 /* Now warn if a global symbol is undefined. We could not 5031 do this earlier, because check_dynamic_reloc might want 5032 to skip this reloc. */ 5033 if (hundef && ! finfo->info->shared && ! r_baserel) 5034 { 5035 const char *name; 5036 5037 if (h != NULL) 5038 name = h->root.root.string; 5039 else 5040 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 5041 if (! ((*finfo->info->callbacks->undefined_symbol) 5042 (finfo->info, name, input_bfd, input_section, 5043 r_addr, true))) 5044 return false; 5045 } 5046 5047 r = MY_final_link_relocate (howto, 5048 input_bfd, input_section, 5049 contents, r_addr, relocation, 5050 (bfd_vma) 0); 5051 } 5052 5053 if (r != bfd_reloc_ok) 5054 { 5055 switch (r) 5056 { 5057 default: 5058 case bfd_reloc_outofrange: 5059 abort (); 5060 case bfd_reloc_overflow: 5061 { 5062 const char *name; 5063 5064 if (h != NULL) 5065 name = h->root.root.string; 5066 else if (r_extern) 5067 name = strings + GET_WORD (input_bfd, 5068 syms[r_index].e_strx); 5069 else 5070 { 5071 asection *s; 5072 5073 s = aout_reloc_index_to_section (input_bfd, r_index); 5074 name = bfd_section_name (input_bfd, s); 5075 } 5076 if (! ((*finfo->info->callbacks->reloc_overflow) 5077 (finfo->info, name, howto->name, 5078 (bfd_vma) 0, input_bfd, input_section, r_addr))) 5079 return false; 5080 } 5081 break; 5082 } 5083 } 5084 } 5085 5086 return true; 5087} 5088 5089/* Relocate an a.out section using extended a.out relocs. */ 5090 5091static boolean 5092aout_link_input_section_ext (finfo, input_bfd, input_section, relocs, 5093 rel_size, contents) 5094 struct aout_final_link_info *finfo; 5095 bfd *input_bfd; 5096 asection *input_section; 5097 struct reloc_ext_external *relocs; 5098 bfd_size_type rel_size; 5099 bfd_byte *contents; 5100{ 5101 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, 5102 bfd *, asection *, 5103 struct aout_link_hash_entry *, 5104 PTR, bfd_byte *, boolean *, 5105 bfd_vma *)); 5106 bfd *output_bfd; 5107 boolean relocateable; 5108 struct external_nlist *syms; 5109 char *strings; 5110 struct aout_link_hash_entry **sym_hashes; 5111 int *symbol_map; 5112 bfd_size_type reloc_count; 5113 register struct reloc_ext_external *rel; 5114 struct reloc_ext_external *rel_end; 5115 5116 output_bfd = finfo->output_bfd; 5117 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; 5118 5119 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); 5120 BFD_ASSERT (input_bfd->xvec->header_byteorder 5121 == output_bfd->xvec->header_byteorder); 5122 5123 relocateable = finfo->info->relocateable; 5124 syms = obj_aout_external_syms (input_bfd); 5125 strings = obj_aout_external_strings (input_bfd); 5126 sym_hashes = obj_aout_sym_hashes (input_bfd); 5127 symbol_map = finfo->symbol_map; 5128 5129 reloc_count = rel_size / RELOC_EXT_SIZE; 5130 rel = relocs; 5131 rel_end = rel + reloc_count; 5132 for (; rel < rel_end; rel++) 5133 { 5134 bfd_vma r_addr; 5135 int r_index; 5136 int r_extern; 5137 unsigned int r_type; 5138 bfd_vma r_addend; 5139 struct aout_link_hash_entry *h = NULL; 5140 asection *r_section = NULL; 5141 bfd_vma relocation; 5142 5143 r_addr = GET_SWORD (input_bfd, rel->r_address); 5144 5145 if (bfd_header_big_endian (input_bfd)) 5146 { 5147 r_index = ((rel->r_index[0] << 16) 5148 | (rel->r_index[1] << 8) 5149 | rel->r_index[2]); 5150 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 5151 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 5152 >> RELOC_EXT_BITS_TYPE_SH_BIG); 5153 } 5154 else 5155 { 5156 r_index = ((rel->r_index[2] << 16) 5157 | (rel->r_index[1] << 8) 5158 | rel->r_index[0]); 5159 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 5160 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 5161 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 5162 } 5163 5164 r_addend = GET_SWORD (input_bfd, rel->r_addend); 5165 5166 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); 5167 5168 if (relocateable) 5169 { 5170 /* We are generating a relocateable output file, and must 5171 modify the reloc accordingly. */ 5172 if (r_extern 5173 || r_type == RELOC_BASE10 5174 || r_type == RELOC_BASE13 5175 || r_type == RELOC_BASE22) 5176 { 5177 /* If we know the symbol this relocation is against, 5178 convert it into a relocation against a section. This 5179 is what the native linker does. */ 5180 if (r_type == RELOC_BASE10 5181 || r_type == RELOC_BASE13 5182 || r_type == RELOC_BASE22) 5183 h = NULL; 5184 else 5185 h = sym_hashes[r_index]; 5186 if (h != (struct aout_link_hash_entry *) NULL 5187 && (h->root.type == bfd_link_hash_defined 5188 || h->root.type == bfd_link_hash_defweak)) 5189 { 5190 asection *output_section; 5191 5192 /* Change the r_extern value. */ 5193 if (bfd_header_big_endian (output_bfd)) 5194 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; 5195 else 5196 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; 5197 5198 /* Compute a new r_index. */ 5199 output_section = h->root.u.def.section->output_section; 5200 if (output_section == obj_textsec (output_bfd)) 5201 r_index = N_TEXT; 5202 else if (output_section == obj_datasec (output_bfd)) 5203 r_index = N_DATA; 5204 else if (output_section == obj_bsssec (output_bfd)) 5205 r_index = N_BSS; 5206 else 5207 r_index = N_ABS; 5208 5209 /* Add the symbol value and the section VMA to the 5210 addend. */ 5211 relocation = (h->root.u.def.value 5212 + output_section->vma 5213 + h->root.u.def.section->output_offset); 5214 5215 /* Now RELOCATION is the VMA of the final 5216 destination. If this is a PC relative reloc, 5217 then ADDEND is the negative of the source VMA. 5218 We want to set ADDEND to the difference between 5219 the destination VMA and the source VMA, which 5220 means we must adjust RELOCATION by the change in 5221 the source VMA. This is done below. */ 5222 } 5223 else 5224 { 5225 /* We must change r_index according to the symbol 5226 map. */ 5227 r_index = symbol_map[r_index]; 5228 5229 if (r_index == -1) 5230 { 5231 if (h != NULL) 5232 { 5233 /* We decided to strip this symbol, but it 5234 turns out that we can't. Note that we 5235 lose the other and desc information here. 5236 I don't think that will ever matter for a 5237 global symbol. */ 5238 if (h->indx < 0) 5239 { 5240 h->indx = -2; 5241 h->written = false; 5242 if (! aout_link_write_other_symbol (h, 5243 (PTR) finfo)) 5244 return false; 5245 } 5246 r_index = h->indx; 5247 } 5248 else 5249 { 5250 const char *name; 5251 5252 name = strings + GET_WORD (input_bfd, 5253 syms[r_index].e_strx); 5254 if (! ((*finfo->info->callbacks->unattached_reloc) 5255 (finfo->info, name, input_bfd, input_section, 5256 r_addr))) 5257 return false; 5258 r_index = 0; 5259 } 5260 } 5261 5262 relocation = 0; 5263 5264 /* If this is a PC relative reloc, then the addend 5265 is the negative of the source VMA. We must 5266 adjust it by the change in the source VMA. This 5267 is done below. */ 5268 } 5269 5270 /* Write out the new r_index value. */ 5271 if (bfd_header_big_endian (output_bfd)) 5272 { 5273 rel->r_index[0] = r_index >> 16; 5274 rel->r_index[1] = r_index >> 8; 5275 rel->r_index[2] = r_index; 5276 } 5277 else 5278 { 5279 rel->r_index[2] = r_index >> 16; 5280 rel->r_index[1] = r_index >> 8; 5281 rel->r_index[0] = r_index; 5282 } 5283 } 5284 else 5285 { 5286 /* This is a relocation against a section. We must 5287 adjust by the amount that the section moved. */ 5288 r_section = aout_reloc_index_to_section (input_bfd, r_index); 5289 relocation = (r_section->output_section->vma 5290 + r_section->output_offset 5291 - r_section->vma); 5292 5293 /* If this is a PC relative reloc, then the addend is 5294 the difference in VMA between the destination and the 5295 source. We have just adjusted for the change in VMA 5296 of the destination, so we must also adjust by the 5297 change in VMA of the source. This is done below. */ 5298 } 5299 5300 /* As described above, we must always adjust a PC relative 5301 reloc by the change in VMA of the source. However, if 5302 pcrel_offset is set, then the addend does not include the 5303 location within the section, in which case we don't need 5304 to adjust anything. */ 5305 if (howto_table_ext[r_type].pc_relative 5306 && ! howto_table_ext[r_type].pcrel_offset) 5307 relocation -= (input_section->output_section->vma 5308 + input_section->output_offset 5309 - input_section->vma); 5310 5311 /* Change the addend if necessary. */ 5312 if (relocation != 0) 5313 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); 5314 5315 /* Change the address of the relocation. */ 5316 PUT_WORD (output_bfd, 5317 r_addr + input_section->output_offset, 5318 rel->r_address); 5319 } 5320 else 5321 { 5322 boolean hundef; 5323 bfd_reloc_status_type r; 5324 5325 /* We are generating an executable, and must do a full 5326 relocation. */ 5327 hundef = false; 5328 5329 if (r_extern) 5330 { 5331 h = sym_hashes[r_index]; 5332 5333 if (h != (struct aout_link_hash_entry *) NULL 5334 && (h->root.type == bfd_link_hash_defined 5335 || h->root.type == bfd_link_hash_defweak)) 5336 { 5337 relocation = (h->root.u.def.value 5338 + h->root.u.def.section->output_section->vma 5339 + h->root.u.def.section->output_offset); 5340 } 5341 else if (h != (struct aout_link_hash_entry *) NULL 5342 && h->root.type == bfd_link_hash_undefweak) 5343 relocation = 0; 5344 else 5345 { 5346 hundef = true; 5347 relocation = 0; 5348 } 5349 } 5350 else if (r_type == RELOC_BASE10 5351 || r_type == RELOC_BASE13 5352 || r_type == RELOC_BASE22) 5353 { 5354 struct external_nlist *sym; 5355 int type; 5356 5357 /* For base relative relocs, r_index is always an index 5358 into the symbol table, even if r_extern is 0. */ 5359 sym = syms + r_index; 5360 type = bfd_h_get_8 (input_bfd, sym->e_type); 5361 if ((type & N_TYPE) == N_TEXT 5362 || type == N_WEAKT) 5363 r_section = obj_textsec (input_bfd); 5364 else if ((type & N_TYPE) == N_DATA 5365 || type == N_WEAKD) 5366 r_section = obj_datasec (input_bfd); 5367 else if ((type & N_TYPE) == N_BSS 5368 || type == N_WEAKB) 5369 r_section = obj_bsssec (input_bfd); 5370 else if ((type & N_TYPE) == N_ABS 5371 || type == N_WEAKA) 5372 r_section = bfd_abs_section_ptr; 5373 else 5374 abort (); 5375 relocation = (r_section->output_section->vma 5376 + r_section->output_offset 5377 + (GET_WORD (input_bfd, sym->e_value) 5378 - r_section->vma)); 5379 } 5380 else 5381 { 5382 r_section = aout_reloc_index_to_section (input_bfd, r_index); 5383 5384 /* If this is a PC relative reloc, then R_ADDEND is the 5385 difference between the two vmas, or 5386 old_dest_sec + old_dest_off - (old_src_sec + old_src_off) 5387 where 5388 old_dest_sec == section->vma 5389 and 5390 old_src_sec == input_section->vma 5391 and 5392 old_src_off == r_addr 5393 5394 _bfd_final_link_relocate expects RELOCATION + 5395 R_ADDEND to be the VMA of the destination minus 5396 r_addr (the minus r_addr is because this relocation 5397 is not pcrel_offset, which is a bit confusing and 5398 should, perhaps, be changed), or 5399 new_dest_sec 5400 where 5401 new_dest_sec == output_section->vma + output_offset 5402 We arrange for this to happen by setting RELOCATION to 5403 new_dest_sec + old_src_sec - old_dest_sec 5404 5405 If this is not a PC relative reloc, then R_ADDEND is 5406 simply the VMA of the destination, so we set 5407 RELOCATION to the change in the destination VMA, or 5408 new_dest_sec - old_dest_sec 5409 */ 5410 relocation = (r_section->output_section->vma 5411 + r_section->output_offset 5412 - r_section->vma); 5413 if (howto_table_ext[r_type].pc_relative) 5414 relocation += input_section->vma; 5415 } 5416 5417 if (check_dynamic_reloc != NULL) 5418 { 5419 boolean skip; 5420 5421 if (! ((*check_dynamic_reloc) 5422 (finfo->info, input_bfd, input_section, h, 5423 (PTR) rel, contents, &skip, &relocation))) 5424 return false; 5425 if (skip) 5426 continue; 5427 } 5428 5429 /* Now warn if a global symbol is undefined. We could not 5430 do this earlier, because check_dynamic_reloc might want 5431 to skip this reloc. */ 5432 if (hundef 5433 && ! finfo->info->shared 5434 && r_type != RELOC_BASE10 5435 && r_type != RELOC_BASE13 5436 && r_type != RELOC_BASE22) 5437 { 5438 const char *name; 5439 5440 if (h != NULL) 5441 name = h->root.root.string; 5442 else 5443 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); 5444 if (! ((*finfo->info->callbacks->undefined_symbol) 5445 (finfo->info, name, input_bfd, input_section, 5446 r_addr, true))) 5447 return false; 5448 } 5449 5450 if (r_type != RELOC_SPARC_REV32) 5451 r = MY_final_link_relocate (howto_table_ext + r_type, 5452 input_bfd, input_section, 5453 contents, r_addr, relocation, 5454 r_addend); 5455 else 5456 { 5457 bfd_vma x; 5458 5459 x = bfd_get_32 (input_bfd, contents + r_addr); 5460 x = x + relocation + r_addend; 5461 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); 5462 r = bfd_reloc_ok; 5463 } 5464 5465 if (r != bfd_reloc_ok) 5466 { 5467 switch (r) 5468 { 5469 default: 5470 case bfd_reloc_outofrange: 5471 abort (); 5472 case bfd_reloc_overflow: 5473 { 5474 const char *name; 5475 5476 if (h != NULL) 5477 name = h->root.root.string; 5478 else if (r_extern 5479 || r_type == RELOC_BASE10 5480 || r_type == RELOC_BASE13 5481 || r_type == RELOC_BASE22) 5482 name = strings + GET_WORD (input_bfd, 5483 syms[r_index].e_strx); 5484 else 5485 { 5486 asection *s; 5487 5488 s = aout_reloc_index_to_section (input_bfd, r_index); 5489 name = bfd_section_name (input_bfd, s); 5490 } 5491 if (! ((*finfo->info->callbacks->reloc_overflow) 5492 (finfo->info, name, howto_table_ext[r_type].name, 5493 r_addend, input_bfd, input_section, r_addr))) 5494 return false; 5495 } 5496 break; 5497 } 5498 } 5499 } 5500 } 5501 5502 return true; 5503} 5504 5505/* Handle a link order which is supposed to generate a reloc. */ 5506 5507static boolean 5508aout_link_reloc_link_order (finfo, o, p) 5509 struct aout_final_link_info *finfo; 5510 asection *o; 5511 struct bfd_link_order *p; 5512{ 5513 struct bfd_link_order_reloc *pr; 5514 int r_index; 5515 int r_extern; 5516 reloc_howto_type *howto; 5517 file_ptr *reloff_ptr = NULL; 5518 struct reloc_std_external srel; 5519 struct reloc_ext_external erel; 5520 PTR rel_ptr; 5521 5522 pr = p->u.reloc.p; 5523 5524 if (p->type == bfd_section_reloc_link_order) 5525 { 5526 r_extern = 0; 5527 if (bfd_is_abs_section (pr->u.section)) 5528 r_index = N_ABS | N_EXT; 5529 else 5530 { 5531 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); 5532 r_index = pr->u.section->target_index; 5533 } 5534 } 5535 else 5536 { 5537 struct aout_link_hash_entry *h; 5538 5539 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); 5540 r_extern = 1; 5541 h = ((struct aout_link_hash_entry *) 5542 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, 5543 pr->u.name, false, false, true)); 5544 if (h != (struct aout_link_hash_entry *) NULL 5545 && h->indx >= 0) 5546 r_index = h->indx; 5547 else if (h != NULL) 5548 { 5549 /* We decided to strip this symbol, but it turns out that we 5550 can't. Note that we lose the other and desc information 5551 here. I don't think that will ever matter for a global 5552 symbol. */ 5553 h->indx = -2; 5554 h->written = false; 5555 if (! aout_link_write_other_symbol (h, (PTR) finfo)) 5556 return false; 5557 r_index = h->indx; 5558 } 5559 else 5560 { 5561 if (! ((*finfo->info->callbacks->unattached_reloc) 5562 (finfo->info, pr->u.name, (bfd *) NULL, 5563 (asection *) NULL, (bfd_vma) 0))) 5564 return false; 5565 r_index = 0; 5566 } 5567 } 5568 5569 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); 5570 if (howto == 0) 5571 { 5572 bfd_set_error (bfd_error_bad_value); 5573 return false; 5574 } 5575 5576 if (o == obj_textsec (finfo->output_bfd)) 5577 reloff_ptr = &finfo->treloff; 5578 else if (o == obj_datasec (finfo->output_bfd)) 5579 reloff_ptr = &finfo->dreloff; 5580 else 5581 abort (); 5582 5583 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) 5584 { 5585#ifdef MY_put_reloc 5586 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto, 5587 &srel); 5588#else 5589 { 5590 int r_pcrel; 5591 int r_baserel; 5592 int r_jmptable; 5593 int r_relative; 5594 int r_length; 5595 5596 r_pcrel = howto->pc_relative; 5597 r_baserel = (howto->type & 8) != 0; 5598 r_jmptable = (howto->type & 16) != 0; 5599 r_relative = (howto->type & 32) != 0; 5600 r_length = howto->size; 5601 5602 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); 5603 if (bfd_header_big_endian (finfo->output_bfd)) 5604 { 5605 srel.r_index[0] = r_index >> 16; 5606 srel.r_index[1] = r_index >> 8; 5607 srel.r_index[2] = r_index; 5608 srel.r_type[0] = 5609 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) 5610 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) 5611 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) 5612 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) 5613 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) 5614 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); 5615 } 5616 else 5617 { 5618 srel.r_index[2] = r_index >> 16; 5619 srel.r_index[1] = r_index >> 8; 5620 srel.r_index[0] = r_index; 5621 srel.r_type[0] = 5622 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) 5623 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) 5624 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) 5625 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) 5626 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) 5627 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 5628 } 5629 } 5630#endif 5631 rel_ptr = (PTR) &srel; 5632 5633 /* We have to write the addend into the object file, since 5634 standard a.out relocs are in place. It would be more 5635 reliable if we had the current contents of the file here, 5636 rather than assuming zeroes, but we can't read the file since 5637 it was opened using bfd_openw. */ 5638 if (pr->addend != 0) 5639 { 5640 bfd_size_type size; 5641 bfd_reloc_status_type r; 5642 bfd_byte *buf; 5643 boolean ok; 5644 5645 size = bfd_get_reloc_size (howto); 5646 buf = (bfd_byte *) bfd_zmalloc (size); 5647 if (buf == (bfd_byte *) NULL) 5648 return false; 5649 r = MY_relocate_contents (howto, finfo->output_bfd, 5650 pr->addend, buf); 5651 switch (r) 5652 { 5653 case bfd_reloc_ok: 5654 break; 5655 default: 5656 case bfd_reloc_outofrange: 5657 abort (); 5658 case bfd_reloc_overflow: 5659 if (! ((*finfo->info->callbacks->reloc_overflow) 5660 (finfo->info, 5661 (p->type == bfd_section_reloc_link_order 5662 ? bfd_section_name (finfo->output_bfd, 5663 pr->u.section) 5664 : pr->u.name), 5665 howto->name, pr->addend, (bfd *) NULL, 5666 (asection *) NULL, (bfd_vma) 0))) 5667 { 5668 free (buf); 5669 return false; 5670 } 5671 break; 5672 } 5673 ok = bfd_set_section_contents (finfo->output_bfd, o, 5674 (PTR) buf, 5675 (file_ptr) p->offset, 5676 size); 5677 free (buf); 5678 if (! ok) 5679 return false; 5680 } 5681 } 5682 else 5683 { 5684#ifdef MY_put_ext_reloc 5685 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset, 5686 howto, &erel, pr->addend); 5687#else 5688 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); 5689 5690 if (bfd_header_big_endian (finfo->output_bfd)) 5691 { 5692 erel.r_index[0] = r_index >> 16; 5693 erel.r_index[1] = r_index >> 8; 5694 erel.r_index[2] = r_index; 5695 erel.r_type[0] = 5696 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) 5697 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); 5698 } 5699 else 5700 { 5701 erel.r_index[2] = r_index >> 16; 5702 erel.r_index[1] = r_index >> 8; 5703 erel.r_index[0] = r_index; 5704 erel.r_type[0] = 5705 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) 5706 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); 5707 } 5708 5709 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend); 5710#endif /* MY_put_ext_reloc */ 5711 5712 rel_ptr = (PTR) &erel; 5713 } 5714 5715 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 5716 || (bfd_write (rel_ptr, (bfd_size_type) 1, 5717 obj_reloc_entry_size (finfo->output_bfd), 5718 finfo->output_bfd) 5719 != obj_reloc_entry_size (finfo->output_bfd))) 5720 return false; 5721 5722 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); 5723 5724 /* Assert that the relocs have not run into the symbols, and that n 5725 the text relocs have not run into the data relocs. */ 5726 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) 5727 && (reloff_ptr != &finfo->treloff 5728 || (*reloff_ptr 5729 <= obj_datasec (finfo->output_bfd)->rel_filepos))); 5730 5731 return true; 5732} 5733