1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sunos_big_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected.
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
122 #include <string.h> /* For strchr and friends */
130 #include "aout/aout64.h"
131 #include "aout/stab_gnu.h"
134 static boolean aout_get_external_symbols PARAMS ((bfd *));
135 static boolean translate_from_native_sym_flags
136 PARAMS ((bfd *, aout_symbol_type *));
137 static boolean translate_to_native_sym_flags
138 PARAMS ((bfd *, asymbol *, struct external_nlist *));
145 The file @file{aoutx.h} provides for both the @emph{standard}
146 and @emph{extended} forms of a.out relocation records.
148 The standard records contain only an
149 address, a symbol index, and a type field. The extended records
150 (used on 29ks and sparcs) also have a full integer for an
154 #ifndef CTOR_TABLE_RELOC_HOWTO
155 #define CTOR_TABLE_RELOC_IDX 2
156 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
157 ? howto_table_ext : howto_table_std) \
158 + CTOR_TABLE_RELOC_IDX)
161 #ifndef MY_swap_std_reloc_in
162 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
165 #ifndef MY_swap_std_reloc_out
166 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
169 #ifndef MY_final_link_relocate
170 #define MY_final_link_relocate _bfd_final_link_relocate
173 #ifndef MY_relocate_contents
174 #define MY_relocate_contents _bfd_relocate_contents
177 #define howto_table_ext NAME(aout,ext_howto_table)
178 #define howto_table_std NAME(aout,std_howto_table)
180 reloc_howto_type howto_table_ext[] =
182 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
183 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
184 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
185 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
186 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
187 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
188 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
189 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
190 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
191 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
192 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
193 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
194 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
195 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
196 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
197 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false),
198 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"BASE13", false, 0,0x00001fff, false),
199 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false),
200 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
201 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
202 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
203 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
204 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
205 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
206 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
209 /* Convert standard reloc records to "arelent" format (incl byte swap). */
211 reloc_howto_type howto_table_std[] = {
212 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
213 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
214 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
215 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
216 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
217 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
218 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
219 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
220 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
221 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
222 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
223 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
229 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
237 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
238 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
246 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
249 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
252 NAME(aout,reloc_type_lookup) (abfd,code)
254 bfd_reloc_code_real_type code;
256 #define EXT(i,j) case i: return &howto_table_ext[j]
257 #define STD(i,j) case i: return &howto_table_std[j]
258 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
259 if (code == BFD_RELOC_CTOR)
260 switch (bfd_get_arch_info (abfd)->bits_per_address)
272 EXT (BFD_RELOC_32, 2);
273 EXT (BFD_RELOC_HI22, 8);
274 EXT (BFD_RELOC_LO10, 11);
275 EXT (BFD_RELOC_32_PCREL_S2, 6);
276 EXT (BFD_RELOC_SPARC_WDISP22, 7);
277 EXT (BFD_RELOC_SPARC13, 10);
278 EXT (BFD_RELOC_SPARC_GOT10, 14);
279 EXT (BFD_RELOC_SPARC_BASE13, 15);
280 EXT (BFD_RELOC_SPARC_GOT13, 15);
281 EXT (BFD_RELOC_SPARC_GOT22, 16);
282 EXT (BFD_RELOC_SPARC_PC10, 17);
283 EXT (BFD_RELOC_SPARC_PC22, 18);
284 EXT (BFD_RELOC_SPARC_WPLT30, 19);
285 default: return (reloc_howto_type *) NULL;
291 STD (BFD_RELOC_16, 1);
292 STD (BFD_RELOC_32, 2);
293 STD (BFD_RELOC_8_PCREL, 4);
294 STD (BFD_RELOC_16_PCREL, 5);
295 STD (BFD_RELOC_32_PCREL, 6);
296 STD (BFD_RELOC_16_BASEREL, 9);
297 STD (BFD_RELOC_32_BASEREL, 10);
298 default: return (reloc_howto_type *) NULL;
304 Internal entry points
307 @file{aoutx.h} exports several routines for accessing the
308 contents of an a.out file, which are gathered and exported in
309 turn by various format specific files (eg sunos.c).
315 aout_@var{size}_swap_exec_header_in
318 void aout_@var{size}_swap_exec_header_in,
320 struct external_exec *raw_bytes,
321 struct internal_exec *execp);
324 Swap the information in an executable header @var{raw_bytes} taken
325 from a raw byte stream memory image into the internal exec header
326 structure @var{execp}.
329 #ifndef NAME_swap_exec_header_in
331 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
333 struct external_exec *raw_bytes;
334 struct internal_exec *execp;
336 struct external_exec *bytes = (struct external_exec *)raw_bytes;
338 /* The internal_exec structure has some fields that are unused in this
339 configuration (IE for i960), so ensure that all such uninitialized
340 fields are zero'd out. There are places where two of these structs
341 are memcmp'd, and thus the contents do matter. */
342 memset ((PTR) execp, 0, sizeof (struct internal_exec));
343 /* Now fill in fields in the execp, from the bytes in the raw data. */
344 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
345 execp->a_text = GET_WORD (abfd, bytes->e_text);
346 execp->a_data = GET_WORD (abfd, bytes->e_data);
347 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
348 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
349 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
350 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
351 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
353 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
358 aout_@var{size}_swap_exec_header_out
361 void aout_@var{size}_swap_exec_header_out
363 struct internal_exec *execp,
364 struct external_exec *raw_bytes);
367 Swap the information in an internal exec header structure
368 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
371 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
373 struct internal_exec *execp;
374 struct external_exec *raw_bytes;
376 struct external_exec *bytes = (struct external_exec *)raw_bytes;
378 /* Now fill in fields in the raw data, from the fields in the exec struct. */
379 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
380 PUT_WORD (abfd, execp->a_text , bytes->e_text);
381 PUT_WORD (abfd, execp->a_data , bytes->e_data);
382 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
383 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
384 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
385 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
386 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
389 /* Make all the section for an a.out file. */
392 NAME(aout,make_sections) (abfd)
395 if (obj_textsec (abfd) == (asection *) NULL
396 && bfd_make_section (abfd, ".text") == (asection *) NULL)
398 if (obj_datasec (abfd) == (asection *) NULL
399 && bfd_make_section (abfd, ".data") == (asection *) NULL)
401 if (obj_bsssec (abfd) == (asection *) NULL
402 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
409 aout_@var{size}_some_aout_object_p
412 const bfd_target *aout_@var{size}_some_aout_object_p
414 const bfd_target *(*callback_to_real_object_p)());
417 Some a.out variant thinks that the file open in @var{abfd}
418 checking is an a.out file. Do some more checking, and set up
419 for access if it really is. Call back to the calling
420 environment's "finish up" function just before returning, to
421 handle any last-minute setup.
425 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
427 struct internal_exec *execp;
428 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
430 struct aout_data_struct *rawptr, *oldrawptr;
431 const bfd_target *result;
433 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
437 oldrawptr = abfd->tdata.aout_data;
438 abfd->tdata.aout_data = rawptr;
440 /* Copy the contents of the old tdata struct.
441 In particular, we want the subformat, since for hpux it was set in
442 hp300hpux.c:swap_exec_header_in and will be used in
443 hp300hpux.c:callback. */
444 if (oldrawptr != NULL)
445 *abfd->tdata.aout_data = *oldrawptr;
447 abfd->tdata.aout_data->a.hdr = &rawptr->e;
448 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
449 execp = abfd->tdata.aout_data->a.hdr;
451 /* Set the file flags */
452 abfd->flags = NO_FLAGS;
453 if (execp->a_drsize || execp->a_trsize)
454 abfd->flags |= HAS_RELOC;
455 /* Setting of EXEC_P has been deferred to the bottom of this function */
457 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
458 if (N_DYNAMIC(*execp))
459 abfd->flags |= DYNAMIC;
461 if (N_MAGIC (*execp) == ZMAGIC)
463 abfd->flags |= D_PAGED | WP_TEXT;
464 adata (abfd).magic = z_magic;
466 else if (N_MAGIC (*execp) == QMAGIC)
468 abfd->flags |= D_PAGED | WP_TEXT;
469 adata (abfd).magic = z_magic;
470 adata (abfd).subformat = q_magic_format;
472 else if (N_MAGIC (*execp) == NMAGIC)
474 abfd->flags |= WP_TEXT;
475 adata (abfd).magic = n_magic;
477 else if (N_MAGIC (*execp) == OMAGIC
478 || N_MAGIC (*execp) == BMAGIC)
479 adata (abfd).magic = o_magic;
482 /* Should have been checked with N_BADMAG before this routine
487 bfd_get_start_address (abfd) = execp->a_entry;
489 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
490 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
492 /* The default relocation entry size is that of traditional V7 Unix. */
493 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
495 /* The default symbol entry size is that of traditional Unix. */
496 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
499 bfd_init_window (&obj_aout_sym_window (abfd));
500 bfd_init_window (&obj_aout_string_window (abfd));
502 obj_aout_external_syms (abfd) = NULL;
503 obj_aout_external_strings (abfd) = NULL;
504 obj_aout_sym_hashes (abfd) = NULL;
506 if (! NAME(aout,make_sections) (abfd))
509 obj_datasec (abfd)->_raw_size = execp->a_data;
510 obj_bsssec (abfd)->_raw_size = execp->a_bss;
512 obj_textsec (abfd)->flags =
513 (execp->a_trsize != 0
514 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
515 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
516 obj_datasec (abfd)->flags =
517 (execp->a_drsize != 0
518 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
519 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
520 obj_bsssec (abfd)->flags = SEC_ALLOC;
522 #ifdef THIS_IS_ONLY_DOCUMENTATION
523 /* The common code can't fill in these things because they depend
524 on either the start address of the text segment, the rounding
525 up of virtual addresses between segments, or the starting file
526 position of the text segment -- all of which varies among different
527 versions of a.out. */
529 /* Call back to the format-dependent code to fill in the rest of the
530 fields and do any further cleanup. Things that should be filled
531 in by the callback: */
533 struct exec *execp = exec_hdr (abfd);
535 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
536 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
537 /* data and bss are already filled in since they're so standard */
539 /* The virtual memory addresses of the sections */
540 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
541 obj_datasec (abfd)->vma = N_DATADDR(*execp);
542 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
544 /* The file offsets of the sections */
545 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
546 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
548 /* The file offsets of the relocation info */
549 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
550 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
552 /* The file offsets of the string table and symbol table. */
553 obj_str_filepos (abfd) = N_STROFF (*execp);
554 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
556 /* Determine the architecture and machine type of the object file. */
557 switch (N_MACHTYPE (*exec_hdr (abfd))) {
559 abfd->obj_arch = bfd_arch_obscure;
563 adata(abfd)->page_size = TARGET_PAGE_SIZE;
564 adata(abfd)->segment_size = SEGMENT_SIZE;
565 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
569 /* The architecture is encoded in various ways in various a.out variants,
570 or is not encoded at all in some of them. The relocation size depends
571 on the architecture and the a.out variant. Finally, the return value
572 is the bfd_target vector in use. If an error occurs, return zero and
573 set bfd_error to the appropriate error code.
575 Formats such as b.out, which have additional fields in the a.out
576 header, should cope with them in this callback as well. */
577 #endif /* DOCUMENTATION */
579 result = (*callback_to_real_object_p)(abfd);
581 /* Now that the segment addresses have been worked out, take a better
582 guess at whether the file is executable. If the entry point
583 is within the text segment, assume it is. (This makes files
584 executable even if their entry point address is 0, as long as
585 their text starts at zero.). */
586 if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
587 (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
588 abfd->flags |= EXEC_P;
592 struct stat stat_buf;
594 /* The original heuristic doesn't work in some important cases.
595 The a.out file has no information about the text start
596 address. For files (like kernels) linked to non-standard
597 addresses (ld -Ttext nnn) the entry point may not be between
598 the default text start (obj_textsec(abfd)->vma) and
599 (obj_textsec(abfd)->vma) + text size. This is not just a mach
600 issue. Many kernels are loaded at non standard addresses. */
601 if (abfd->iostream != NULL
602 && (abfd->flags & BFD_IN_MEMORY) == 0
603 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
604 && ((stat_buf.st_mode & 0111) != 0))
605 abfd->flags |= EXEC_P;
607 #endif /* STAT_FOR_EXEC */
611 #if 0 /* These should be set correctly anyways. */
612 abfd->sections = obj_textsec (abfd);
613 obj_textsec (abfd)->next = obj_datasec (abfd);
614 obj_datasec (abfd)->next = obj_bsssec (abfd);
620 abfd->tdata.aout_data = oldrawptr;
627 aout_@var{size}_mkobject
630 boolean aout_@var{size}_mkobject, (bfd *abfd);
633 Initialize BFD @var{abfd} for use with a.out files.
637 NAME(aout,mkobject) (abfd)
640 struct aout_data_struct *rawptr;
642 bfd_set_error (bfd_error_system_call);
644 /* Use an intermediate variable for clarity */
645 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
650 abfd->tdata.aout_data = rawptr;
651 exec_hdr (abfd) = &(rawptr->e);
653 obj_textsec (abfd) = (asection *)NULL;
654 obj_datasec (abfd) = (asection *)NULL;
655 obj_bsssec (abfd) = (asection *)NULL;
663 aout_@var{size}_machine_type
666 enum machine_type aout_@var{size}_machine_type
667 (enum bfd_architecture arch,
668 unsigned long machine));
671 Keep track of machine architecture and machine type for
672 a.out's. Return the <<machine_type>> for a particular
673 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
674 and machine can't be represented in a.out format.
676 If the architecture is understood, machine type 0 (default)
677 is always understood.
681 NAME(aout,machine_type) (arch, machine, unknown)
682 enum bfd_architecture arch;
683 unsigned long machine;
686 enum machine_type arch_flags;
688 arch_flags = M_UNKNOWN;
694 || machine == bfd_mach_sparc
695 || machine == bfd_mach_sparc_sparclite
696 || machine == bfd_mach_sparc_v9)
697 arch_flags = M_SPARC;
698 else if (machine == bfd_mach_sparc_sparclet)
699 arch_flags = M_SPARCLET;
704 case 0: arch_flags = M_68010; break;
705 case 68000: arch_flags = M_UNKNOWN; *unknown = false; break;
706 case 68010: arch_flags = M_68010; break;
707 case 68020: arch_flags = M_68020; break;
708 default: arch_flags = M_UNKNOWN; break;
713 if (machine == 0) arch_flags = M_386;
717 if (machine == 0) arch_flags = M_29K;
721 if (machine == 0) arch_flags = M_ARM;
728 case 3000: arch_flags = M_MIPS1; break;
729 case 4000: /* mips3 */
731 case 8000: /* mips4 */
733 case 6000: arch_flags = M_MIPS2; break;
734 default: arch_flags = M_UNKNOWN; break;
740 case 0: arch_flags = M_NS32532; break;
741 case 32032: arch_flags = M_NS32032; break;
742 case 32532: arch_flags = M_NS32532; break;
743 default: arch_flags = M_UNKNOWN; break;
751 /* start-sanitize-rce */
755 /* end-sanitize-rce */
758 arch_flags = M_UNKNOWN;
761 if (arch_flags != M_UNKNOWN)
770 aout_@var{size}_set_arch_mach
773 boolean aout_@var{size}_set_arch_mach,
775 enum bfd_architecture arch,
776 unsigned long machine));
779 Set the architecture and the machine of the BFD @var{abfd} to the
780 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
781 can support the architecture required.
785 NAME(aout,set_arch_mach) (abfd, arch, machine)
787 enum bfd_architecture arch;
788 unsigned long machine;
790 if (! bfd_default_set_arch_mach (abfd, arch, machine))
793 if (arch != bfd_arch_unknown)
797 NAME(aout,machine_type) (arch, machine, &unknown);
802 /* Determine the size of a relocation entry */
807 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
810 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
814 return (*aout_backend_info(abfd)->set_sizes) (abfd);
818 adjust_o_magic (abfd, execp)
820 struct internal_exec *execp;
822 file_ptr pos = adata (abfd).exec_bytes_size;
827 obj_textsec(abfd)->filepos = pos;
828 if (!obj_textsec(abfd)->user_set_vma)
829 obj_textsec(abfd)->vma = vma;
831 vma = obj_textsec(abfd)->vma;
833 pos += obj_textsec(abfd)->_raw_size;
834 vma += obj_textsec(abfd)->_raw_size;
837 if (!obj_datasec(abfd)->user_set_vma)
839 #if 0 /* ?? Does alignment in the file image really matter? */
840 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
842 obj_textsec(abfd)->_raw_size += pad;
845 obj_datasec(abfd)->vma = vma;
848 vma = obj_datasec(abfd)->vma;
849 obj_datasec(abfd)->filepos = pos;
850 pos += obj_datasec(abfd)->_raw_size;
851 vma += obj_datasec(abfd)->_raw_size;
854 if (!obj_bsssec(abfd)->user_set_vma)
857 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
859 obj_datasec(abfd)->_raw_size += pad;
862 obj_bsssec(abfd)->vma = vma;
866 /* The VMA of the .bss section is set by the the VMA of the
867 .data section plus the size of the .data section. We may
868 need to add padding bytes to make this true. */
869 pad = obj_bsssec (abfd)->vma - vma;
872 obj_datasec (abfd)->_raw_size += pad;
876 obj_bsssec(abfd)->filepos = pos;
878 /* Fix up the exec header. */
879 execp->a_text = obj_textsec(abfd)->_raw_size;
880 execp->a_data = obj_datasec(abfd)->_raw_size;
881 execp->a_bss = obj_bsssec(abfd)->_raw_size;
882 N_SET_MAGIC (*execp, OMAGIC);
886 adjust_z_magic (abfd, execp)
888 struct internal_exec *execp;
890 bfd_size_type data_pad, text_pad;
892 CONST struct aout_backend_data *abdp;
893 int ztih; /* Nonzero if text includes exec header. */
895 abdp = aout_backend_info (abfd);
899 && (abdp->text_includes_header
900 || obj_aout_subformat (abfd) == q_magic_format));
901 obj_textsec(abfd)->filepos = (ztih
902 ? adata(abfd).exec_bytes_size
903 : adata(abfd).zmagic_disk_block_size);
904 if (! obj_textsec(abfd)->user_set_vma)
906 /* ?? Do we really need to check for relocs here? */
907 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
910 ? (abdp->default_text_vma
911 + adata(abfd).exec_bytes_size)
912 : abdp->default_text_vma));
917 /* The .text section is being loaded at an unusual address. We
918 may need to pad it such that the .data section starts at a page
921 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
922 & (adata (abfd).page_size - 1));
924 text_pad = ((- obj_textsec (abfd)->vma)
925 & (adata (abfd).page_size - 1));
928 /* Find start of data. */
931 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
932 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
936 /* Note that if page_size == zmagic_disk_block_size, then
937 filepos == page_size, and this case is the same as the ztih
939 text_end = obj_textsec (abfd)->_raw_size;
940 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
941 text_end += obj_textsec (abfd)->filepos;
943 obj_textsec(abfd)->_raw_size += text_pad;
944 text_end += text_pad;
947 if (!obj_datasec(abfd)->user_set_vma)
950 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
951 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
953 if (abdp && abdp->zmagic_mapped_contiguous)
955 text_pad = (obj_datasec(abfd)->vma
956 - obj_textsec(abfd)->vma
957 - obj_textsec(abfd)->_raw_size);
958 obj_textsec(abfd)->_raw_size += text_pad;
960 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
961 + obj_textsec(abfd)->_raw_size);
963 /* Fix up exec header while we're at it. */
964 execp->a_text = obj_textsec(abfd)->_raw_size;
965 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
966 execp->a_text += adata(abfd).exec_bytes_size;
967 if (obj_aout_subformat (abfd) == q_magic_format)
968 N_SET_MAGIC (*execp, QMAGIC);
970 N_SET_MAGIC (*execp, ZMAGIC);
972 /* Spec says data section should be rounded up to page boundary. */
973 obj_datasec(abfd)->_raw_size
974 = align_power (obj_datasec(abfd)->_raw_size,
975 obj_bsssec(abfd)->alignment_power);
976 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
977 adata(abfd).page_size);
978 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
981 if (!obj_bsssec(abfd)->user_set_vma)
982 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
983 + obj_datasec(abfd)->_raw_size);
984 /* If the BSS immediately follows the data section and extra space
985 in the page is left after the data section, fudge data
986 in the header so that the bss section looks smaller by that
987 amount. We'll start the bss section there, and lie to the OS.
988 (Note that a linker script, as well as the above assignment,
989 could have explicitly set the BSS vma to immediately follow
990 the data section.) */
991 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
992 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
993 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
994 obj_bsssec(abfd)->_raw_size - data_pad;
996 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1000 adjust_n_magic (abfd, execp)
1002 struct internal_exec *execp;
1004 file_ptr pos = adata(abfd).exec_bytes_size;
1009 obj_textsec(abfd)->filepos = pos;
1010 if (!obj_textsec(abfd)->user_set_vma)
1011 obj_textsec(abfd)->vma = vma;
1013 vma = obj_textsec(abfd)->vma;
1014 pos += obj_textsec(abfd)->_raw_size;
1015 vma += obj_textsec(abfd)->_raw_size;
1018 obj_datasec(abfd)->filepos = pos;
1019 if (!obj_datasec(abfd)->user_set_vma)
1020 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1021 vma = obj_datasec(abfd)->vma;
1023 /* Since BSS follows data immediately, see if it needs alignment. */
1024 vma += obj_datasec(abfd)->_raw_size;
1025 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1026 obj_datasec(abfd)->_raw_size += pad;
1027 pos += obj_datasec(abfd)->_raw_size;
1030 if (!obj_bsssec(abfd)->user_set_vma)
1031 obj_bsssec(abfd)->vma = vma;
1033 vma = obj_bsssec(abfd)->vma;
1035 /* Fix up exec header. */
1036 execp->a_text = obj_textsec(abfd)->_raw_size;
1037 execp->a_data = obj_datasec(abfd)->_raw_size;
1038 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1039 N_SET_MAGIC (*execp, NMAGIC);
1043 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1045 bfd_size_type *text_size;
1048 struct internal_exec *execp = exec_hdr (abfd);
1050 if (! NAME(aout,make_sections) (abfd))
1053 if (adata(abfd).magic != undecided_magic)
1056 obj_textsec(abfd)->_raw_size =
1057 align_power(obj_textsec(abfd)->_raw_size,
1058 obj_textsec(abfd)->alignment_power);
1060 *text_size = obj_textsec (abfd)->_raw_size;
1061 /* Rule (heuristic) for when to pad to a new page. Note that there
1062 are (at least) two ways demand-paged (ZMAGIC) files have been
1063 handled. Most Berkeley-based systems start the text segment at
1064 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1065 segment right after the exec header; the latter is counted in the
1066 text segment size, and is paged in by the kernel with the rest of
1069 /* This perhaps isn't the right way to do this, but made it simpler for me
1070 to understand enough to implement it. Better would probably be to go
1071 right from BFD flags to alignment/positioning characteristics. But the
1072 old code was sloppy enough about handling the flags, and had enough
1073 other magic, that it was a little hard for me to understand. I think
1074 I understand it better now, but I haven't time to do the cleanup this
1077 if (abfd->flags & D_PAGED)
1078 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1079 adata(abfd).magic = z_magic;
1080 else if (abfd->flags & WP_TEXT)
1081 adata(abfd).magic = n_magic;
1083 adata(abfd).magic = o_magic;
1085 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1087 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1089 switch (adata(abfd).magic) {
1090 case n_magic: str = "NMAGIC"; break;
1091 case o_magic: str = "OMAGIC"; break;
1092 case z_magic: str = "ZMAGIC"; break;
1097 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1098 obj_textsec(abfd)->alignment_power,
1099 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1100 obj_datasec(abfd)->alignment_power,
1101 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1102 obj_bsssec(abfd)->alignment_power);
1106 switch (adata(abfd).magic)
1109 adjust_o_magic (abfd, execp);
1112 adjust_z_magic (abfd, execp);
1115 adjust_n_magic (abfd, execp);
1121 #ifdef BFD_AOUT_DEBUG
1122 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1123 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1124 obj_textsec(abfd)->filepos,
1125 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1126 obj_datasec(abfd)->filepos,
1127 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1135 aout_@var{size}_new_section_hook
1138 boolean aout_@var{size}_new_section_hook,
1140 asection *newsect));
1143 Called by the BFD in response to a @code{bfd_make_section}
1147 NAME(aout,new_section_hook) (abfd, newsect)
1151 /* align to double at least */
1152 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1155 if (bfd_get_format (abfd) == bfd_object)
1157 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1158 obj_textsec(abfd)= newsect;
1159 newsect->target_index = N_TEXT;
1163 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1164 obj_datasec(abfd) = newsect;
1165 newsect->target_index = N_DATA;
1169 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1170 obj_bsssec(abfd) = newsect;
1171 newsect->target_index = N_BSS;
1177 /* We allow more than three sections internally */
1182 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1187 bfd_size_type count;
1190 bfd_size_type text_size;
1192 if (! abfd->output_has_begun)
1194 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1198 if (section == obj_bsssec (abfd))
1200 bfd_set_error (bfd_error_no_contents);
1204 if (section != obj_textsec (abfd)
1205 && section != obj_datasec (abfd))
1207 (*_bfd_error_handler)
1208 ("%s: can not represent section `%s' in a.out object file format",
1209 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1210 bfd_set_error (bfd_error_nonrepresentable_section);
1216 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1217 || bfd_write (location, 1, count, abfd) != count)
1224 /* Read the external symbols from an a.out file. */
1227 aout_get_external_symbols (abfd)
1230 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1232 bfd_size_type count;
1233 struct external_nlist *syms;
1235 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1238 if (bfd_get_file_window (abfd,
1239 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1240 &obj_aout_sym_window (abfd), true) == false)
1242 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1244 /* We allocate using malloc to make the values easy to free
1245 later on. If we put them on the obstack it might not be
1246 possible to free them. */
1247 syms = ((struct external_nlist *)
1248 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1249 if (syms == (struct external_nlist *) NULL && count != 0)
1252 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1253 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1254 != exec_hdr (abfd)->a_syms))
1261 obj_aout_external_syms (abfd) = syms;
1262 obj_aout_external_sym_count (abfd) = count;
1265 if (obj_aout_external_strings (abfd) == NULL
1266 && exec_hdr (abfd)->a_syms != 0)
1268 unsigned char string_chars[BYTES_IN_WORD];
1269 bfd_size_type stringsize;
1272 /* Get the size of the strings. */
1273 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1274 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1277 stringsize = GET_WORD (abfd, string_chars);
1280 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1281 &obj_aout_string_window (abfd), true) == false)
1283 strings = (char *) obj_aout_string_window (abfd).data;
1285 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1286 if (strings == NULL)
1289 /* Skip space for the string count in the buffer for convenience
1290 when using indexes. */
1291 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1293 != stringsize - BYTES_IN_WORD)
1300 /* Ensure that a zero index yields an empty string. */
1303 strings[stringsize - 1] = 0;
1305 obj_aout_external_strings (abfd) = strings;
1306 obj_aout_external_string_size (abfd) = stringsize;
1312 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1313 and symbol->value fields of CACHE_PTR will be set from the a.out
1314 nlist structure. This function is responsible for setting
1315 symbol->flags and symbol->section, and adjusting symbol->value. */
1318 translate_from_native_sym_flags (abfd, cache_ptr)
1320 aout_symbol_type *cache_ptr;
1324 if ((cache_ptr->type & N_STAB) != 0
1325 || cache_ptr->type == N_FN)
1329 /* This is a debugging symbol. */
1331 cache_ptr->symbol.flags = BSF_DEBUGGING;
1333 /* Work out the symbol section. */
1334 switch (cache_ptr->type & N_TYPE)
1338 sec = obj_textsec (abfd);
1341 sec = obj_datasec (abfd);
1344 sec = obj_bsssec (abfd);
1348 sec = bfd_abs_section_ptr;
1352 cache_ptr->symbol.section = sec;
1353 cache_ptr->symbol.value -= sec->vma;
1358 /* Get the default visibility. This does not apply to all types, so
1359 we just hold it in a local variable to use if wanted. */
1360 if ((cache_ptr->type & N_EXT) == 0)
1361 visible = BSF_LOCAL;
1363 visible = BSF_GLOBAL;
1365 switch (cache_ptr->type)
1368 case N_ABS: case N_ABS | N_EXT:
1369 cache_ptr->symbol.section = bfd_abs_section_ptr;
1370 cache_ptr->symbol.flags = visible;
1373 case N_UNDF | N_EXT:
1374 if (cache_ptr->symbol.value != 0)
1376 /* This is a common symbol. */
1377 cache_ptr->symbol.flags = BSF_GLOBAL;
1378 cache_ptr->symbol.section = bfd_com_section_ptr;
1382 cache_ptr->symbol.flags = 0;
1383 cache_ptr->symbol.section = bfd_und_section_ptr;
1387 case N_TEXT: case N_TEXT | N_EXT:
1388 cache_ptr->symbol.section = obj_textsec (abfd);
1389 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1390 cache_ptr->symbol.flags = visible;
1393 /* N_SETV symbols used to represent set vectors placed in the
1394 data section. They are no longer generated. Theoretically,
1395 it was possible to extract the entries and combine them with
1396 new ones, although I don't know if that was ever actually
1397 done. Unless that feature is restored, treat them as data
1399 case N_SETV: case N_SETV | N_EXT:
1400 case N_DATA: case N_DATA | N_EXT:
1401 cache_ptr->symbol.section = obj_datasec (abfd);
1402 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1403 cache_ptr->symbol.flags = visible;
1406 case N_BSS: case N_BSS | N_EXT:
1407 cache_ptr->symbol.section = obj_bsssec (abfd);
1408 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1409 cache_ptr->symbol.flags = visible;
1412 case N_SETA: case N_SETA | N_EXT:
1413 case N_SETT: case N_SETT | N_EXT:
1414 case N_SETD: case N_SETD | N_EXT:
1415 case N_SETB: case N_SETB | N_EXT:
1418 arelent_chain *reloc;
1419 asection *into_section;
1421 /* This is a set symbol. The name of the symbol is the name
1422 of the set (e.g., __CTOR_LIST__). The value of the symbol
1423 is the value to add to the set. We create a section with
1424 the same name as the symbol, and add a reloc to insert the
1425 appropriate value into the section.
1427 This action is actually obsolete; it used to make the
1428 linker do the right thing, but the linker no longer uses
1431 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1432 if (section == NULL)
1436 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1440 strcpy (copy, cache_ptr->symbol.name);
1441 section = bfd_make_section (abfd, copy);
1442 if (section == NULL)
1446 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1450 /* Build a relocation entry for the constructor. */
1451 switch (cache_ptr->type & N_TYPE)
1454 into_section = bfd_abs_section_ptr;
1455 cache_ptr->type = N_ABS;
1458 into_section = obj_textsec (abfd);
1459 cache_ptr->type = N_TEXT;
1462 into_section = obj_datasec (abfd);
1463 cache_ptr->type = N_DATA;
1466 into_section = obj_bsssec (abfd);
1467 cache_ptr->type = N_BSS;
1471 /* Build a relocation pointing into the constructor section
1472 pointing at the symbol in the set vector specified. */
1473 reloc->relent.addend = cache_ptr->symbol.value;
1474 cache_ptr->symbol.section = into_section;
1475 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1477 /* We modify the symbol to belong to a section depending upon
1478 the name of the symbol, and add to the size of the section
1479 to contain a pointer to the symbol. Build a reloc entry to
1480 relocate to this symbol attached to this section. */
1481 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1483 section->reloc_count++;
1484 section->alignment_power = 2;
1486 reloc->next = section->constructor_chain;
1487 section->constructor_chain = reloc;
1488 reloc->relent.address = section->_raw_size;
1489 section->_raw_size += BYTES_IN_WORD;
1491 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1493 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1498 /* This symbol is the text of a warning message. The next
1499 symbol is the symbol to associate the warning with. If a
1500 reference is made to that symbol, a warning is issued. */
1501 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1502 cache_ptr->symbol.section = bfd_abs_section_ptr;
1505 case N_INDR: case N_INDR | N_EXT:
1506 /* An indirect symbol. This consists of two symbols in a row.
1507 The first symbol is the name of the indirection. The second
1508 symbol is the name of the target. A reference to the first
1509 symbol becomes a reference to the second. */
1510 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1511 cache_ptr->symbol.section = bfd_ind_section_ptr;
1515 cache_ptr->symbol.section = bfd_und_section_ptr;
1516 cache_ptr->symbol.flags = BSF_WEAK;
1520 cache_ptr->symbol.section = bfd_abs_section_ptr;
1521 cache_ptr->symbol.flags = BSF_WEAK;
1525 cache_ptr->symbol.section = obj_textsec (abfd);
1526 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1527 cache_ptr->symbol.flags = BSF_WEAK;
1531 cache_ptr->symbol.section = obj_datasec (abfd);
1532 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1533 cache_ptr->symbol.flags = BSF_WEAK;
1537 cache_ptr->symbol.section = obj_bsssec (abfd);
1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1539 cache_ptr->symbol.flags = BSF_WEAK;
1546 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1549 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1552 struct external_nlist *sym_pointer;
1554 bfd_vma value = cache_ptr->value;
1558 /* Mask out any existing type bits in case copying from one section
1560 sym_pointer->e_type[0] &= ~N_TYPE;
1562 sec = bfd_get_section (cache_ptr);
1567 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1569 (*_bfd_error_handler)
1570 ("%s: can not represent section `%s' in a.out object file format",
1571 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1572 bfd_set_error (bfd_error_nonrepresentable_section);
1576 if (sec->output_section != NULL)
1578 off = sec->output_offset;
1579 sec = sec->output_section;
1582 if (bfd_is_abs_section (sec))
1583 sym_pointer->e_type[0] |= N_ABS;
1584 else if (sec == obj_textsec (abfd))
1585 sym_pointer->e_type[0] |= N_TEXT;
1586 else if (sec == obj_datasec (abfd))
1587 sym_pointer->e_type[0] |= N_DATA;
1588 else if (sec == obj_bsssec (abfd))
1589 sym_pointer->e_type[0] |= N_BSS;
1590 else if (bfd_is_und_section (sec))
1591 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1592 else if (bfd_is_ind_section (sec))
1593 sym_pointer->e_type[0] = N_INDR;
1594 else if (bfd_is_com_section (sec))
1595 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1598 (*_bfd_error_handler)
1599 ("%s: can not represent section `%s' in a.out object file format",
1600 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1601 bfd_set_error (bfd_error_nonrepresentable_section);
1605 /* Turn the symbol from section relative to absolute again */
1606 value += sec->vma + off;
1608 if ((cache_ptr->flags & BSF_WARNING) != 0)
1609 sym_pointer->e_type[0] = N_WARNING;
1611 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1612 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1613 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1614 sym_pointer->e_type[0] |= N_EXT;
1616 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1618 int type = ((aout_symbol_type *) cache_ptr)->type;
1621 case N_ABS: type = N_SETA; break;
1622 case N_TEXT: type = N_SETT; break;
1623 case N_DATA: type = N_SETD; break;
1624 case N_BSS: type = N_SETB; break;
1626 sym_pointer->e_type[0] = type;
1629 if ((cache_ptr->flags & BSF_WEAK) != 0)
1633 switch (sym_pointer->e_type[0] & N_TYPE)
1636 case N_ABS: type = N_WEAKA; break;
1637 case N_TEXT: type = N_WEAKT; break;
1638 case N_DATA: type = N_WEAKD; break;
1639 case N_BSS: type = N_WEAKB; break;
1640 case N_UNDF: type = N_WEAKU; break;
1642 sym_pointer->e_type[0] = type;
1645 PUT_WORD(abfd, value, sym_pointer->e_value);
1650 /* Native-level interface to symbols. */
1653 NAME(aout,make_empty_symbol) (abfd)
1656 aout_symbol_type *new =
1657 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1660 new->symbol.the_bfd = abfd;
1662 return &new->symbol;
1665 /* Translate a set of internal symbols into external symbols. */
1668 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1670 aout_symbol_type *in;
1671 struct external_nlist *ext;
1672 bfd_size_type count;
1674 bfd_size_type strsize;
1677 struct external_nlist *ext_end;
1679 ext_end = ext + count;
1680 for (; ext < ext_end; ext++, in++)
1684 x = GET_WORD (abfd, ext->e_strx);
1685 in->symbol.the_bfd = abfd;
1687 /* For the normal symbols, the zero index points at the number
1688 of bytes in the string table but is to be interpreted as the
1689 null string. For the dynamic symbols, the number of bytes in
1690 the string table is stored in the __DYNAMIC structure and the
1691 zero index points at an actual string. */
1692 if (x == 0 && ! dynamic)
1693 in->symbol.name = "";
1694 else if (x < strsize)
1695 in->symbol.name = str + x;
1699 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1700 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1701 in->other = bfd_h_get_8 (abfd, ext->e_other);
1702 in->type = bfd_h_get_8 (abfd, ext->e_type);
1703 in->symbol.udata.p = NULL;
1705 if (! translate_from_native_sym_flags (abfd, in))
1709 in->symbol.flags |= BSF_DYNAMIC;
1715 /* We read the symbols into a buffer, which is discarded when this
1716 function exits. We read the strings into a buffer large enough to
1717 hold them all plus all the cached symbol entries. */
1720 NAME(aout,slurp_symbol_table) (abfd)
1723 struct external_nlist *old_external_syms;
1724 aout_symbol_type *cached;
1727 /* If there's no work to be done, don't do any */
1728 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1731 old_external_syms = obj_aout_external_syms (abfd);
1733 if (! aout_get_external_symbols (abfd))
1736 cached_size = (obj_aout_external_sym_count (abfd)
1737 * sizeof (aout_symbol_type));
1738 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1739 if (cached == NULL && cached_size != 0)
1741 if (cached_size != 0)
1742 memset (cached, 0, cached_size);
1744 /* Convert from external symbol information to internal. */
1745 if (! (NAME(aout,translate_symbol_table)
1747 obj_aout_external_syms (abfd),
1748 obj_aout_external_sym_count (abfd),
1749 obj_aout_external_strings (abfd),
1750 obj_aout_external_string_size (abfd),
1757 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1759 obj_aout_symbols (abfd) = cached;
1761 /* It is very likely that anybody who calls this function will not
1762 want the external symbol information, so if it was allocated
1763 because of our call to aout_get_external_symbols, we free it up
1764 right away to save space. */
1765 if (old_external_syms == (struct external_nlist *) NULL
1766 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1769 bfd_free_window (&obj_aout_sym_window (abfd));
1771 free (obj_aout_external_syms (abfd));
1773 obj_aout_external_syms (abfd) = NULL;
1779 /* We use a hash table when writing out symbols so that we only write
1780 out a particular string once. This helps particularly when the
1781 linker writes out stabs debugging entries, because each different
1782 contributing object file tends to have many duplicate stabs
1785 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1786 if BFD_TRADITIONAL_FORMAT is set. */
1788 static bfd_size_type add_to_stringtab
1789 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1790 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1792 /* Get the index of a string in a strtab, adding it if it is not
1795 static INLINE bfd_size_type
1796 add_to_stringtab (abfd, tab, str, copy)
1798 struct bfd_strtab_hash *tab;
1803 bfd_size_type index;
1805 /* An index of 0 always means the empty string. */
1806 if (str == 0 || *str == '\0')
1809 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1810 doesn't understand a hashed string table. */
1812 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1815 index = _bfd_stringtab_add (tab, str, hash, copy);
1817 if (index != (bfd_size_type) -1)
1819 /* Add BYTES_IN_WORD to the return value to account for the
1820 space taken up by the string table size. */
1821 index += BYTES_IN_WORD;
1827 /* Write out a strtab. ABFD is already at the right location in the
1831 emit_stringtab (abfd, tab)
1833 struct bfd_strtab_hash *tab;
1835 bfd_byte buffer[BYTES_IN_WORD];
1837 /* The string table starts with the size. */
1838 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1839 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1842 return _bfd_stringtab_emit (abfd, tab);
1846 NAME(aout,write_syms) (abfd)
1849 unsigned int count ;
1850 asymbol **generic = bfd_get_outsymbols (abfd);
1851 struct bfd_strtab_hash *strtab;
1853 strtab = _bfd_stringtab_init ();
1857 for (count = 0; count < bfd_get_symcount (abfd); count++)
1859 asymbol *g = generic[count];
1861 struct external_nlist nsp;
1863 indx = add_to_stringtab (abfd, strtab, g->name, false);
1864 if (indx == (bfd_size_type) -1)
1866 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1868 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1870 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1871 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1872 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1876 bfd_h_put_16(abfd,0, nsp.e_desc);
1877 bfd_h_put_8(abfd, 0, nsp.e_other);
1878 bfd_h_put_8(abfd, 0, nsp.e_type);
1881 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1884 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1885 != EXTERNAL_NLIST_SIZE)
1888 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1889 here, at the end. */
1893 if (! emit_stringtab (abfd, strtab))
1896 _bfd_stringtab_free (strtab);
1901 _bfd_stringtab_free (strtab);
1907 NAME(aout,get_symtab) (abfd, location)
1911 unsigned int counter = 0;
1912 aout_symbol_type *symbase;
1914 if (!NAME(aout,slurp_symbol_table)(abfd))
1917 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1918 *(location++) = (asymbol *)( symbase++);
1920 return bfd_get_symcount (abfd);
1924 /* Standard reloc stuff */
1925 /* Output standard relocation information to a file in target byte order. */
1928 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
1931 struct reloc_std_external *natptr;
1934 asymbol *sym = *(g->sym_ptr_ptr);
1936 unsigned int r_length;
1938 int r_baserel, r_jmptable, r_relative;
1939 asection *output_section = sym->section->output_section;
1941 PUT_WORD(abfd, g->address, natptr->r_address);
1943 r_length = g->howto->size ; /* Size as a power of two */
1944 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1945 /* XXX This relies on relocs coming from a.out files. */
1946 r_baserel = (g->howto->type & 8) != 0;
1947 r_jmptable = (g->howto->type & 16) != 0;
1948 r_relative = (g->howto->type & 32) != 0;
1951 /* For a standard reloc, the addend is in the object file. */
1952 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
1955 /* name was clobbered by aout_write_syms to be symbol index */
1957 /* If this relocation is relative to a symbol then set the
1958 r_index to the symbols index, and the r_extern bit.
1960 Absolute symbols can come in in two ways, either as an offset
1961 from the abs section, or as a symbol which has an abs value.
1966 if (bfd_is_com_section (output_section)
1967 || bfd_is_abs_section (output_section)
1968 || bfd_is_und_section (output_section))
1970 if (bfd_abs_section_ptr->symbol == sym)
1972 /* Whoops, looked like an abs symbol, but is really an offset
1973 from the abs section */
1979 /* Fill in symbol */
1981 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1987 /* Just an ordinary section */
1989 r_index = output_section->target_index;
1992 /* now the fun stuff */
1993 if (bfd_header_big_endian (abfd)) {
1994 natptr->r_index[0] = r_index >> 16;
1995 natptr->r_index[1] = r_index >> 8;
1996 natptr->r_index[2] = r_index;
1998 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
1999 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2000 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2001 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2002 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2003 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2005 natptr->r_index[2] = r_index >> 16;
2006 natptr->r_index[1] = r_index >> 8;
2007 natptr->r_index[0] = r_index;
2009 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2010 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2011 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2012 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2013 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2014 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2019 /* Extended stuff */
2020 /* Output extended relocation information to a file in target byte order. */
2023 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2026 register struct reloc_ext_external *natptr;
2030 unsigned int r_type;
2031 unsigned int r_addend;
2032 asymbol *sym = *(g->sym_ptr_ptr);
2033 asection *output_section = sym->section->output_section;
2035 PUT_WORD (abfd, g->address, natptr->r_address);
2037 r_type = (unsigned int) g->howto->type;
2039 r_addend = g->addend;
2040 if ((sym->flags & BSF_SECTION_SYM) != 0)
2041 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2043 /* If this relocation is relative to a symbol then set the
2044 r_index to the symbols index, and the r_extern bit.
2046 Absolute symbols can come in in two ways, either as an offset
2047 from the abs section, or as a symbol which has an abs value.
2048 check for that here. */
2050 if (bfd_is_abs_section (bfd_get_section (sym)))
2055 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2057 if (bfd_is_und_section (bfd_get_section (sym))
2058 || (sym->flags & BSF_GLOBAL) != 0)
2062 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2066 /* Just an ordinary section */
2068 r_index = output_section->target_index;
2071 /* now the fun stuff */
2072 if (bfd_header_big_endian (abfd)) {
2073 natptr->r_index[0] = r_index >> 16;
2074 natptr->r_index[1] = r_index >> 8;
2075 natptr->r_index[2] = r_index;
2077 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2078 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2080 natptr->r_index[2] = r_index >> 16;
2081 natptr->r_index[1] = r_index >> 8;
2082 natptr->r_index[0] = r_index;
2084 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2085 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2088 PUT_WORD (abfd, r_addend, natptr->r_addend);
2091 /* BFD deals internally with all things based from the section they're
2092 in. so, something in 10 bytes into a text section with a base of
2093 50 would have a symbol (.text+10) and know .text vma was 50.
2095 Aout keeps all it's symbols based from zero, so the symbol would
2096 contain 60. This macro subs the base of each section from the value
2097 to give the true offset from the section */
2100 #define MOVE_ADDRESS(ad) \
2102 /* undefined symbol */ \
2103 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2104 cache_ptr->addend = ad; \
2106 /* defined, section relative. replace symbol with pointer to \
2107 symbol which points to section */ \
2108 switch (r_index) { \
2110 case N_TEXT | N_EXT: \
2111 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2112 cache_ptr->addend = ad - su->textsec->vma; \
2115 case N_DATA | N_EXT: \
2116 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2117 cache_ptr->addend = ad - su->datasec->vma; \
2120 case N_BSS | N_EXT: \
2121 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2122 cache_ptr->addend = ad - su->bsssec->vma; \
2126 case N_ABS | N_EXT: \
2127 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2128 cache_ptr->addend = ad; \
2134 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2136 struct reloc_ext_external *bytes;
2139 bfd_size_type symcount;
2141 unsigned int r_index;
2143 unsigned int r_type;
2144 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2146 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2148 /* now the fun stuff */
2149 if (bfd_header_big_endian (abfd)) {
2150 r_index = (bytes->r_index[0] << 16)
2151 | (bytes->r_index[1] << 8)
2152 | bytes->r_index[2];
2153 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2154 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2155 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2157 r_index = (bytes->r_index[2] << 16)
2158 | (bytes->r_index[1] << 8)
2159 | bytes->r_index[0];
2160 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2161 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2162 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2165 cache_ptr->howto = howto_table_ext + r_type;
2167 /* Base relative relocs are always against the symbol table,
2168 regardless of the setting of r_extern. r_extern just reflects
2169 whether the symbol the reloc is against is local or global. */
2170 if (r_type == RELOC_BASE10
2171 || r_type == RELOC_BASE13
2172 || r_type == RELOC_BASE22)
2175 if (r_extern && r_index > symcount)
2177 /* We could arrange to return an error, but it might be useful
2178 to see the file even if it is bad. */
2183 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2187 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2189 struct reloc_std_external *bytes;
2192 bfd_size_type symcount;
2194 unsigned int r_index;
2196 unsigned int r_length;
2198 int r_baserel, r_jmptable, r_relative;
2199 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2200 unsigned int howto_idx;
2202 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2204 /* now the fun stuff */
2205 if (bfd_header_big_endian (abfd)) {
2206 r_index = (bytes->r_index[0] << 16)
2207 | (bytes->r_index[1] << 8)
2208 | bytes->r_index[2];
2209 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2210 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2211 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2212 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2213 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2214 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2215 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2217 r_index = (bytes->r_index[2] << 16)
2218 | (bytes->r_index[1] << 8)
2219 | bytes->r_index[0];
2220 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2221 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2222 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2223 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2224 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2225 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2226 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2229 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2230 + 16 * r_jmptable + 32 * r_relative;
2231 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2232 cache_ptr->howto = howto_table_std + howto_idx;
2233 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2235 /* Base relative relocs are always against the symbol table,
2236 regardless of the setting of r_extern. r_extern just reflects
2237 whether the symbol the reloc is against is local or global. */
2241 if (r_extern && r_index > symcount)
2243 /* We could arrange to return an error, but it might be useful
2244 to see the file even if it is bad. */
2252 /* Read and swap the relocs for a section. */
2255 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2261 bfd_size_type reloc_size;
2263 arelent *reloc_cache;
2265 unsigned int counter = 0;
2268 if (asect->relocation)
2271 if (asect->flags & SEC_CONSTRUCTOR)
2274 if (asect == obj_datasec (abfd))
2275 reloc_size = exec_hdr(abfd)->a_drsize;
2276 else if (asect == obj_textsec (abfd))
2277 reloc_size = exec_hdr(abfd)->a_trsize;
2278 else if (asect == obj_bsssec (abfd))
2282 bfd_set_error (bfd_error_invalid_operation);
2286 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2289 each_size = obj_reloc_entry_size (abfd);
2291 count = reloc_size / each_size;
2293 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2294 if (reloc_cache == NULL && count != 0)
2296 memset (reloc_cache, 0, count * sizeof (arelent));
2298 relocs = bfd_malloc ((size_t) reloc_size);
2299 if (relocs == NULL && reloc_size != 0)
2305 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2312 cache_ptr = reloc_cache;
2313 if (each_size == RELOC_EXT_SIZE)
2315 register struct reloc_ext_external *rptr =
2316 (struct reloc_ext_external *) relocs;
2318 for (; counter < count; counter++, rptr++, cache_ptr++)
2319 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols,
2320 bfd_get_symcount (abfd));
2324 register struct reloc_std_external *rptr =
2325 (struct reloc_std_external *) relocs;
2327 for (; counter < count; counter++, rptr++, cache_ptr++)
2328 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2329 bfd_get_symcount (abfd));
2334 asect->relocation = reloc_cache;
2335 asect->reloc_count = cache_ptr - reloc_cache;
2340 /* Write out a relocation section into an object file. */
2343 NAME(aout,squirt_out_relocs) (abfd, section)
2348 unsigned char *native, *natptr;
2351 unsigned int count = section->reloc_count;
2354 if (count == 0) return true;
2356 each_size = obj_reloc_entry_size (abfd);
2357 natsize = each_size * count;
2358 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2362 generic = section->orelocation;
2364 if (each_size == RELOC_EXT_SIZE)
2366 for (natptr = native;
2368 --count, natptr += each_size, ++generic)
2369 NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
2373 for (natptr = native;
2375 --count, natptr += each_size, ++generic)
2376 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2379 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2380 bfd_release(abfd, native);
2383 bfd_release (abfd, native);
2388 /* This is stupid. This function should be a boolean predicate */
2390 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2396 arelent *tblptr = section->relocation;
2399 if (section == obj_bsssec (abfd))
2405 if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
2408 if (section->flags & SEC_CONSTRUCTOR) {
2409 arelent_chain *chain = section->constructor_chain;
2410 for (count = 0; count < section->reloc_count; count ++) {
2411 *relptr ++ = &chain->relent;
2412 chain = chain->next;
2416 tblptr = section->relocation;
2418 for (count = 0; count++ < section->reloc_count;)
2420 *relptr++ = tblptr++;
2425 return section->reloc_count;
2429 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2433 if (bfd_get_format (abfd) != bfd_object) {
2434 bfd_set_error (bfd_error_invalid_operation);
2437 if (asect->flags & SEC_CONSTRUCTOR) {
2438 return (sizeof (arelent *) * (asect->reloc_count+1));
2441 if (asect == obj_datasec (abfd))
2442 return (sizeof (arelent *)
2443 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2446 if (asect == obj_textsec (abfd))
2447 return (sizeof (arelent *)
2448 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2451 if (asect == obj_bsssec (abfd))
2452 return sizeof (arelent *);
2454 if (asect == obj_bsssec (abfd))
2457 bfd_set_error (bfd_error_invalid_operation);
2463 NAME(aout,get_symtab_upper_bound) (abfd)
2466 if (!NAME(aout,slurp_symbol_table)(abfd))
2469 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2474 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2476 asymbol *ignore_symbol;
2478 return (alent *)NULL;
2483 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2488 bfd_symbol_info (symbol, ret);
2490 if (ret->type == '?')
2492 int type_code = aout_symbol(symbol)->type & 0xff;
2493 const char *stab_name = bfd_get_stab_name (type_code);
2494 static char buf[10];
2496 if (stab_name == NULL)
2498 sprintf(buf, "(%d)", type_code);
2502 ret->stab_type = type_code;
2503 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2504 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2505 ret->stab_name = stab_name;
2511 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2515 bfd_print_symbol_type how;
2517 FILE *file = (FILE *)afile;
2520 case bfd_print_symbol_name:
2522 fprintf(file,"%s", symbol->name);
2524 case bfd_print_symbol_more:
2525 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2526 (unsigned)(aout_symbol(symbol)->other & 0xff),
2527 (unsigned)(aout_symbol(symbol)->type));
2529 case bfd_print_symbol_all:
2531 CONST char *section_name = symbol->section->name;
2534 bfd_print_symbol_vandf((PTR)file,symbol);
2536 fprintf(file," %-5s %04x %02x %02x",
2538 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2539 (unsigned)(aout_symbol(symbol)->other & 0xff),
2540 (unsigned)(aout_symbol(symbol)->type & 0xff));
2542 fprintf(file," %s", symbol->name);
2548 /* If we don't have to allocate more than 1MB to hold the generic
2549 symbols, we use the generic minisymbol methord: it's faster, since
2550 it only translates the symbols once, not multiple times. */
2551 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2553 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2554 symbols. The minisymbol_to_symbol function translates these into
2555 BFD asymbol structures. */
2558 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2562 unsigned int *sizep;
2566 /* We could handle the dynamic symbols here as well, but it's
2567 easier to hand them off. */
2568 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2571 if (! aout_get_external_symbols (abfd))
2574 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2575 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2577 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2579 /* By passing the external symbols back from this routine, we are
2580 giving up control over the memory block. Clear
2581 obj_aout_external_syms, so that we do not try to free it
2583 obj_aout_external_syms (abfd) = NULL;
2585 *sizep = EXTERNAL_NLIST_SIZE;
2586 return obj_aout_external_sym_count (abfd);
2589 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2590 unmodified a.out symbol. The SYM argument is a structure returned
2591 by bfd_make_empty_symbol, which we fill in here. */
2594 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2601 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2602 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2604 memset (sym, 0, sizeof (aout_symbol_type));
2606 /* We call translate_symbol_table to translate a single symbol. */
2607 if (! (NAME(aout,translate_symbol_table)
2609 (aout_symbol_type *) sym,
2610 (struct external_nlist *) minisym,
2612 obj_aout_external_strings (abfd),
2613 obj_aout_external_string_size (abfd),
2621 provided a BFD, a section and an offset into the section, calculate
2622 and return the name of the source file and the line nearest to the
2627 NAME(aout,find_nearest_line)
2628 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2633 CONST char **filename_ptr;
2634 CONST char **functionname_ptr;
2635 unsigned int *line_ptr;
2637 /* Run down the file looking for the filename, function and linenumber */
2639 CONST char *directory_name = NULL;
2640 CONST char *main_file_name = NULL;
2641 CONST char *current_file_name = NULL;
2642 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2643 bfd_vma low_line_vma = 0;
2644 bfd_vma low_func_vma = 0;
2646 size_t filelen, funclen;
2649 *filename_ptr = abfd->filename;
2650 *functionname_ptr = 0;
2652 if (symbols != (asymbol **)NULL) {
2653 for (p = symbols; *p; p++) {
2654 aout_symbol_type *q = (aout_symbol_type *)(*p);
2658 main_file_name = current_file_name = q->symbol.name;
2659 /* Look ahead to next symbol to check if that too is an N_SO. */
2663 q = (aout_symbol_type *)(*p);
2664 if (q->type != (int)N_SO)
2667 /* Found a second N_SO First is directory; second is filename. */
2668 directory_name = current_file_name;
2669 main_file_name = current_file_name = q->symbol.name;
2670 if (obj_textsec(abfd) != section)
2674 current_file_name = q->symbol.name;
2681 /* We'll keep this if it resolves nearer than the one we have
2683 if (q->symbol.value >= low_line_vma
2684 && q->symbol.value <= offset)
2686 *line_ptr = q->desc;
2687 low_line_vma = q->symbol.value;
2688 line_file_name = current_file_name;
2693 /* We'll keep this if it is nearer than the one we have already */
2694 if (q->symbol.value >= low_func_vma &&
2695 q->symbol.value <= offset) {
2696 low_func_vma = q->symbol.value;
2697 func = (asymbol *)q;
2699 else if (q->symbol.value > offset)
2709 main_file_name = line_file_name;
2711 if (main_file_name == NULL
2712 || main_file_name[0] == '/'
2713 || directory_name == NULL)
2716 filelen = strlen (directory_name) + strlen (main_file_name);
2720 funclen = strlen (bfd_asymbol_name (func));
2722 if (adata (abfd).line_buf != NULL)
2723 free (adata (abfd).line_buf);
2724 if (filelen + funclen == 0)
2725 adata (abfd).line_buf = buf = NULL;
2728 buf = (char *) bfd_malloc (filelen + funclen + 2);
2729 adata (abfd).line_buf = buf;
2734 if (main_file_name != NULL)
2736 if (main_file_name[0] == '/' || directory_name == NULL)
2737 *filename_ptr = main_file_name;
2740 sprintf (buf, "%s%s", directory_name, main_file_name);
2741 *filename_ptr = buf;
2748 const char *function = func->name;
2751 /* The caller expects a symbol name. We actually have a
2752 function name, without the leading underscore. Put the
2753 underscore back in, so that the caller gets a symbol name. */
2754 if (bfd_get_symbol_leading_char (abfd) == '\0')
2755 strcpy (buf, function);
2758 buf[0] = bfd_get_symbol_leading_char (abfd);
2759 strcpy (buf + 1, function);
2761 /* Have to remove : stuff */
2762 p = strchr (buf, ':');
2765 *functionname_ptr = buf;
2773 NAME(aout,sizeof_headers) (abfd, execable)
2777 return adata(abfd).exec_bytes_size;
2780 /* Free all information we have cached for this BFD. We can always
2781 read it again later if we need it. */
2784 NAME(aout,bfd_free_cached_info) (abfd)
2789 if (bfd_get_format (abfd) != bfd_object)
2792 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2793 BFCI_FREE (obj_aout_symbols (abfd));
2795 obj_aout_external_syms (abfd) = 0;
2796 bfd_free_window (&obj_aout_sym_window (abfd));
2797 bfd_free_window (&obj_aout_string_window (abfd));
2798 obj_aout_external_strings (abfd) = 0;
2800 BFCI_FREE (obj_aout_external_syms (abfd));
2801 BFCI_FREE (obj_aout_external_strings (abfd));
2803 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2804 BFCI_FREE (o->relocation);
2810 /* a.out link code. */
2812 static boolean aout_link_add_object_symbols
2813 PARAMS ((bfd *, struct bfd_link_info *));
2814 static boolean aout_link_check_archive_element
2815 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2816 static boolean aout_link_free_symbols PARAMS ((bfd *));
2817 static boolean aout_link_check_ar_symbols
2818 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2819 static boolean aout_link_add_symbols
2820 PARAMS ((bfd *, struct bfd_link_info *));
2822 /* Routine to create an entry in an a.out link hash table. */
2824 struct bfd_hash_entry *
2825 NAME(aout,link_hash_newfunc) (entry, table, string)
2826 struct bfd_hash_entry *entry;
2827 struct bfd_hash_table *table;
2830 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2832 /* Allocate the structure if it has not already been allocated by a
2834 if (ret == (struct aout_link_hash_entry *) NULL)
2835 ret = ((struct aout_link_hash_entry *)
2836 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2837 if (ret == (struct aout_link_hash_entry *) NULL)
2838 return (struct bfd_hash_entry *) ret;
2840 /* Call the allocation method of the superclass. */
2841 ret = ((struct aout_link_hash_entry *)
2842 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2846 /* Set local fields. */
2847 ret->written = false;
2851 return (struct bfd_hash_entry *) ret;
2854 /* Initialize an a.out link hash table. */
2857 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2858 struct aout_link_hash_table *table;
2860 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2861 struct bfd_hash_table *,
2864 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2867 /* Create an a.out link hash table. */
2869 struct bfd_link_hash_table *
2870 NAME(aout,link_hash_table_create) (abfd)
2873 struct aout_link_hash_table *ret;
2875 ret = ((struct aout_link_hash_table *)
2876 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2878 return (struct bfd_link_hash_table *) NULL;
2879 if (! NAME(aout,link_hash_table_init) (ret, abfd,
2880 NAME(aout,link_hash_newfunc)))
2883 return (struct bfd_link_hash_table *) NULL;
2888 /* Given an a.out BFD, add symbols to the global hash table as
2892 NAME(aout,link_add_symbols) (abfd, info)
2894 struct bfd_link_info *info;
2896 switch (bfd_get_format (abfd))
2899 return aout_link_add_object_symbols (abfd, info);
2901 return _bfd_generic_link_add_archive_symbols
2902 (abfd, info, aout_link_check_archive_element);
2904 bfd_set_error (bfd_error_wrong_format);
2909 /* Add symbols from an a.out object file. */
2912 aout_link_add_object_symbols (abfd, info)
2914 struct bfd_link_info *info;
2916 if (! aout_get_external_symbols (abfd))
2918 if (! aout_link_add_symbols (abfd, info))
2920 if (! info->keep_memory)
2922 if (! aout_link_free_symbols (abfd))
2928 /* Check a single archive element to see if we need to include it in
2929 the link. *PNEEDED is set according to whether this element is
2930 needed in the link or not. This is called from
2931 _bfd_generic_link_add_archive_symbols. */
2934 aout_link_check_archive_element (abfd, info, pneeded)
2936 struct bfd_link_info *info;
2939 if (! aout_get_external_symbols (abfd))
2942 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
2947 if (! aout_link_add_symbols (abfd, info))
2951 if (! info->keep_memory || ! *pneeded)
2953 if (! aout_link_free_symbols (abfd))
2960 /* Free up the internal symbols read from an a.out file. */
2963 aout_link_free_symbols (abfd)
2966 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
2969 bfd_free_window (&obj_aout_sym_window (abfd));
2971 free ((PTR) obj_aout_external_syms (abfd));
2973 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2975 if (obj_aout_external_strings (abfd) != (char *) NULL)
2978 bfd_free_window (&obj_aout_string_window (abfd));
2980 free ((PTR) obj_aout_external_strings (abfd));
2982 obj_aout_external_strings (abfd) = (char *) NULL;
2987 /* Look through the internal symbols to see if this object file should
2988 be included in the link. We should include this object file if it
2989 defines any symbols which are currently undefined. If this object
2990 file defines a common symbol, then we may adjust the size of the
2991 known symbol but we do not include the object file in the link
2992 (unless there is some other reason to include it). */
2995 aout_link_check_ar_symbols (abfd, info, pneeded)
2997 struct bfd_link_info *info;
3000 register struct external_nlist *p;
3001 struct external_nlist *pend;
3006 /* Look through all the symbols. */
3007 p = obj_aout_external_syms (abfd);
3008 pend = p + obj_aout_external_sym_count (abfd);
3009 strings = obj_aout_external_strings (abfd);
3010 for (; p < pend; p++)
3012 int type = bfd_h_get_8 (abfd, p->e_type);
3014 struct bfd_link_hash_entry *h;
3016 /* Ignore symbols that are not externally visible. This is an
3017 optimization only, as we check the type more thoroughly
3019 if (((type & N_EXT) == 0
3020 || (type & N_STAB) != 0
3027 if (type == N_WARNING
3033 name = strings + GET_WORD (abfd, p->e_strx);
3034 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3036 /* We are only interested in symbols that are currently
3037 undefined or common. */
3038 if (h == (struct bfd_link_hash_entry *) NULL
3039 || (h->type != bfd_link_hash_undefined
3040 && h->type != bfd_link_hash_common))
3042 if (type == (N_INDR | N_EXT))
3047 if (type == (N_TEXT | N_EXT)
3048 || type == (N_DATA | N_EXT)
3049 || type == (N_BSS | N_EXT)
3050 || type == (N_ABS | N_EXT)
3051 || type == (N_INDR | N_EXT))
3053 /* This object file defines this symbol. We must link it
3054 in. This is true regardless of whether the current
3055 definition of the symbol is undefined or common. If the
3056 current definition is common, we have a case in which we
3057 have already seen an object file including
3059 and this object file from the archive includes
3061 In such a case we must include this object file.
3063 FIXME: The SunOS 4.1.3 linker will pull in the archive
3064 element if the symbol is defined in the .data section,
3065 but not if it is defined in the .text section. That
3066 seems a bit crazy to me, and I haven't implemented it.
3067 However, it might be correct. */
3068 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3074 if (type == (N_UNDF | N_EXT))
3078 value = GET_WORD (abfd, p->e_value);
3081 /* This symbol is common in the object from the archive
3083 if (h->type == bfd_link_hash_undefined)
3088 symbfd = h->u.undef.abfd;
3089 if (symbfd == (bfd *) NULL)
3091 /* This symbol was created as undefined from
3092 outside BFD. We assume that we should link
3093 in the object file. This is done for the -u
3094 option in the linker. */
3095 if (! (*info->callbacks->add_archive_element) (info,
3102 /* Turn the current link symbol into a common
3103 symbol. It is already on the undefs list. */
3104 h->type = bfd_link_hash_common;
3105 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3106 bfd_hash_allocate (&info->hash->table,
3107 sizeof (struct bfd_link_hash_common_entry)));
3108 if (h->u.c.p == NULL)
3111 h->u.c.size = value;
3113 /* FIXME: This isn't quite right. The maximum
3114 alignment of a common symbol should be set by the
3115 architecture of the output file, not of the input
3117 power = bfd_log2 (value);
3118 if (power > bfd_get_arch_info (abfd)->section_align_power)
3119 power = bfd_get_arch_info (abfd)->section_align_power;
3120 h->u.c.p->alignment_power = power;
3122 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3127 /* Adjust the size of the common symbol if
3129 if (value > h->u.c.size)
3130 h->u.c.size = value;
3140 /* This symbol is weak but defined. We must pull it in if
3141 the current link symbol is undefined, but we don't want
3142 it if the current link symbol is common. */
3143 if (h->type == bfd_link_hash_undefined)
3145 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3153 /* We do not need this object file. */
3157 /* Add all symbols from an object file to the hash table. */
3160 aout_link_add_symbols (abfd, info)
3162 struct bfd_link_info *info;
3164 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3165 const char *, flagword, asection *,
3166 bfd_vma, const char *, boolean,
3168 struct bfd_link_hash_entry **));
3169 struct external_nlist *syms;
3170 bfd_size_type sym_count;
3173 struct aout_link_hash_entry **sym_hash;
3174 register struct external_nlist *p;
3175 struct external_nlist *pend;
3177 syms = obj_aout_external_syms (abfd);
3178 sym_count = obj_aout_external_sym_count (abfd);
3179 strings = obj_aout_external_strings (abfd);
3180 if (info->keep_memory)
3185 if ((abfd->flags & DYNAMIC) != 0
3186 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3188 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3189 (abfd, info, &syms, &sym_count, &strings)))
3193 /* We keep a list of the linker hash table entries that correspond
3194 to particular symbols. We could just look them up in the hash
3195 table, but keeping the list is more efficient. Perhaps this
3196 should be conditional on info->keep_memory. */
3197 sym_hash = ((struct aout_link_hash_entry **)
3200 * sizeof (struct aout_link_hash_entry *))));
3201 if (sym_hash == NULL && sym_count != 0)
3203 obj_aout_sym_hashes (abfd) = sym_hash;
3205 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3206 if (add_one_symbol == NULL)
3207 add_one_symbol = _bfd_generic_link_add_one_symbol;
3210 pend = p + sym_count;
3211 for (; p < pend; p++, sym_hash++)
3222 type = bfd_h_get_8 (abfd, p->e_type);
3224 /* Ignore debugging symbols. */
3225 if ((type & N_STAB) != 0)
3228 name = strings + GET_WORD (abfd, p->e_strx);
3229 value = GET_WORD (abfd, p->e_value);
3246 /* Ignore symbols that are not externally visible. */
3249 /* Ignore local indirect symbol. */
3254 case N_UNDF | N_EXT:
3257 section = bfd_und_section_ptr;
3261 section = bfd_com_section_ptr;
3264 section = bfd_abs_section_ptr;
3266 case N_TEXT | N_EXT:
3267 section = obj_textsec (abfd);
3268 value -= bfd_get_section_vma (abfd, section);
3270 case N_DATA | N_EXT:
3271 case N_SETV | N_EXT:
3272 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3273 translate_from_native_sym_flags. */
3274 section = obj_datasec (abfd);
3275 value -= bfd_get_section_vma (abfd, section);
3278 section = obj_bsssec (abfd);
3279 value -= bfd_get_section_vma (abfd, section);
3281 case N_INDR | N_EXT:
3282 /* An indirect symbol. The next symbol is the symbol
3283 which this one really is. */
3284 BFD_ASSERT (p + 1 < pend);
3286 string = strings + GET_WORD (abfd, p->e_strx);
3287 section = bfd_ind_section_ptr;
3288 flags |= BSF_INDIRECT;
3290 case N_COMM | N_EXT:
3291 section = bfd_com_section_ptr;
3293 case N_SETA: case N_SETA | N_EXT:
3294 section = bfd_abs_section_ptr;
3295 flags |= BSF_CONSTRUCTOR;
3297 case N_SETT: case N_SETT | N_EXT:
3298 section = obj_textsec (abfd);
3299 flags |= BSF_CONSTRUCTOR;
3300 value -= bfd_get_section_vma (abfd, section);
3302 case N_SETD: case N_SETD | N_EXT:
3303 section = obj_datasec (abfd);
3304 flags |= BSF_CONSTRUCTOR;
3305 value -= bfd_get_section_vma (abfd, section);
3307 case N_SETB: case N_SETB | N_EXT:
3308 section = obj_bsssec (abfd);
3309 flags |= BSF_CONSTRUCTOR;
3310 value -= bfd_get_section_vma (abfd, section);
3313 /* A warning symbol. The next symbol is the one to warn
3315 BFD_ASSERT (p + 1 < pend);
3318 name = strings + GET_WORD (abfd, p->e_strx);
3319 section = bfd_und_section_ptr;
3320 flags |= BSF_WARNING;
3323 section = bfd_und_section_ptr;
3327 section = bfd_abs_section_ptr;
3331 section = obj_textsec (abfd);
3332 value -= bfd_get_section_vma (abfd, section);
3336 section = obj_datasec (abfd);
3337 value -= bfd_get_section_vma (abfd, section);
3341 section = obj_bsssec (abfd);
3342 value -= bfd_get_section_vma (abfd, section);
3347 if (! ((*add_one_symbol)
3348 (info, abfd, name, flags, section, value, string, copy, false,
3349 (struct bfd_link_hash_entry **) sym_hash)))
3352 /* Restrict the maximum alignment of a common symbol based on
3353 the architecture, since a.out has no way to represent
3354 alignment requirements of a section in a .o file. FIXME:
3355 This isn't quite right: it should use the architecture of the
3356 output file, not the input files. */
3357 if ((*sym_hash)->root.type == bfd_link_hash_common
3358 && ((*sym_hash)->root.u.c.p->alignment_power >
3359 bfd_get_arch_info (abfd)->section_align_power))
3360 (*sym_hash)->root.u.c.p->alignment_power =
3361 bfd_get_arch_info (abfd)->section_align_power;
3363 /* If this is a set symbol, and we are not building sets, then
3364 it is possible for the hash entry to not have been set. In
3365 such a case, treat the symbol as not globally defined. */
3366 if ((*sym_hash)->root.type == bfd_link_hash_new)
3368 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3372 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3379 /* A hash table used for header files with N_BINCL entries. */
3381 struct aout_link_includes_table
3383 struct bfd_hash_table root;
3386 /* A linked list of totals that we have found for a particular header
3389 struct aout_link_includes_totals
3391 struct aout_link_includes_totals *next;
3395 /* An entry in the header file hash table. */
3397 struct aout_link_includes_entry
3399 struct bfd_hash_entry root;
3400 /* List of totals we have found for this file. */
3401 struct aout_link_includes_totals *totals;
3404 /* Look up an entry in an the header file hash table. */
3406 #define aout_link_includes_lookup(table, string, create, copy) \
3407 ((struct aout_link_includes_entry *) \
3408 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3410 /* During the final link step we need to pass around a bunch of
3411 information, so we do it in an instance of this structure. */
3413 struct aout_final_link_info
3415 /* General link information. */
3416 struct bfd_link_info *info;
3419 /* Reloc file positions. */
3420 file_ptr treloff, dreloff;
3421 /* File position of symbols. */
3424 struct bfd_strtab_hash *strtab;
3425 /* Header file hash table. */
3426 struct aout_link_includes_table includes;
3427 /* A buffer large enough to hold the contents of any section. */
3429 /* A buffer large enough to hold the relocs of any section. */
3431 /* A buffer large enough to hold the symbol map of any input BFD. */
3433 /* A buffer large enough to hold output symbols of any input BFD. */
3434 struct external_nlist *output_syms;
3437 static struct bfd_hash_entry *aout_link_includes_newfunc
3438 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3439 static boolean aout_link_input_bfd
3440 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3441 static boolean aout_link_write_symbols
3442 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3443 static boolean aout_link_write_other_symbol
3444 PARAMS ((struct aout_link_hash_entry *, PTR));
3445 static boolean aout_link_input_section
3446 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3447 asection *input_section, file_ptr *reloff_ptr,
3448 bfd_size_type rel_size));
3449 static boolean aout_link_input_section_std
3450 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3451 asection *input_section, struct reloc_std_external *,
3452 bfd_size_type rel_size, bfd_byte *contents));
3453 static boolean aout_link_input_section_ext
3454 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3455 asection *input_section, struct reloc_ext_external *,
3456 bfd_size_type rel_size, bfd_byte *contents));
3457 static INLINE asection *aout_reloc_index_to_section
3458 PARAMS ((bfd *, int));
3459 static boolean aout_link_reloc_link_order
3460 PARAMS ((struct aout_final_link_info *, asection *,
3461 struct bfd_link_order *));
3463 /* The function to create a new entry in the header file hash table. */
3465 static struct bfd_hash_entry *
3466 aout_link_includes_newfunc (entry, table, string)
3467 struct bfd_hash_entry *entry;
3468 struct bfd_hash_table *table;
3471 struct aout_link_includes_entry *ret =
3472 (struct aout_link_includes_entry *) entry;
3474 /* Allocate the structure if it has not already been allocated by a
3476 if (ret == (struct aout_link_includes_entry *) NULL)
3477 ret = ((struct aout_link_includes_entry *)
3478 bfd_hash_allocate (table,
3479 sizeof (struct aout_link_includes_entry)));
3480 if (ret == (struct aout_link_includes_entry *) NULL)
3481 return (struct bfd_hash_entry *) ret;
3483 /* Call the allocation method of the superclass. */
3484 ret = ((struct aout_link_includes_entry *)
3485 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3488 /* Set local fields. */
3492 return (struct bfd_hash_entry *) ret;
3495 /* Do the final link step. This is called on the output BFD. The
3496 INFO structure should point to a list of BFDs linked through the
3497 link_next field which can be used to find each BFD which takes part
3498 in the output. Also, each section in ABFD should point to a list
3499 of bfd_link_order structures which list all the input sections for
3500 the output section. */
3503 NAME(aout,final_link) (abfd, info, callback)
3505 struct bfd_link_info *info;
3506 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3508 struct aout_final_link_info aout_info;
3509 boolean includes_hash_initialized = false;
3511 bfd_size_type trsize, drsize;
3512 size_t max_contents_size;
3513 size_t max_relocs_size;
3514 size_t max_sym_count;
3515 bfd_size_type text_size;
3517 register struct bfd_link_order *p;
3519 boolean have_link_order_relocs;
3522 abfd->flags |= DYNAMIC;
3524 aout_info.info = info;
3525 aout_info.output_bfd = abfd;
3526 aout_info.contents = NULL;
3527 aout_info.relocs = NULL;
3528 aout_info.symbol_map = NULL;
3529 aout_info.output_syms = NULL;
3531 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3532 aout_link_includes_newfunc,
3535 includes_hash_initialized = true;
3537 /* Figure out the largest section size. Also, if generating
3538 relocateable output, count the relocs. */
3541 max_contents_size = 0;
3542 max_relocs_size = 0;
3544 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3548 if (info->relocateable)
3550 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3552 trsize += exec_hdr (sub)->a_trsize;
3553 drsize += exec_hdr (sub)->a_drsize;
3557 /* FIXME: We need to identify the .text and .data sections
3558 and call get_reloc_upper_bound and canonicalize_reloc to
3559 work out the number of relocs needed, and then multiply
3560 by the reloc size. */
3561 (*_bfd_error_handler)
3562 ("%s: relocateable link from %s to %s not supported",
3563 bfd_get_filename (abfd),
3564 sub->xvec->name, abfd->xvec->name);
3565 bfd_set_error (bfd_error_invalid_operation);
3570 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3572 sz = bfd_section_size (sub, obj_textsec (sub));
3573 if (sz > max_contents_size)
3574 max_contents_size = sz;
3575 sz = bfd_section_size (sub, obj_datasec (sub));
3576 if (sz > max_contents_size)
3577 max_contents_size = sz;
3579 sz = exec_hdr (sub)->a_trsize;
3580 if (sz > max_relocs_size)
3581 max_relocs_size = sz;
3582 sz = exec_hdr (sub)->a_drsize;
3583 if (sz > max_relocs_size)
3584 max_relocs_size = sz;
3586 sz = obj_aout_external_sym_count (sub);
3587 if (sz > max_sym_count)
3592 if (info->relocateable)
3594 if (obj_textsec (abfd) != (asection *) NULL)
3595 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3597 * obj_reloc_entry_size (abfd));
3598 if (obj_datasec (abfd) != (asection *) NULL)
3599 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3601 * obj_reloc_entry_size (abfd));
3604 exec_hdr (abfd)->a_trsize = trsize;
3605 exec_hdr (abfd)->a_drsize = drsize;
3607 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3609 /* Adjust the section sizes and vmas according to the magic number.
3610 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3611 filepos for each section. */
3612 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3615 /* The relocation and symbol file positions differ among a.out
3616 targets. We are passed a callback routine from the backend
3617 specific code to handle this.
3618 FIXME: At this point we do not know how much space the symbol
3619 table will require. This will not work for any (nonstandard)
3620 a.out target that needs to know the symbol table size before it
3621 can compute the relocation file positions. This may or may not
3622 be the case for the hp300hpux target, for example. */
3623 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3625 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3626 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3627 obj_sym_filepos (abfd) = aout_info.symoff;
3629 /* We keep a count of the symbols as we output them. */
3630 obj_aout_external_sym_count (abfd) = 0;
3632 /* We accumulate the string table as we write out the symbols. */
3633 aout_info.strtab = _bfd_stringtab_init ();
3634 if (aout_info.strtab == NULL)
3637 /* Allocate buffers to hold section contents and relocs. */
3638 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3639 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3640 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3641 aout_info.output_syms = ((struct external_nlist *)
3642 bfd_malloc ((max_sym_count + 1)
3643 * sizeof (struct external_nlist)));
3644 if ((aout_info.contents == NULL && max_contents_size != 0)
3645 || (aout_info.relocs == NULL && max_relocs_size != 0)
3646 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3647 || aout_info.output_syms == NULL)
3650 /* If we have a symbol named __DYNAMIC, force it out now. This is
3651 required by SunOS. Doing this here rather than in sunos.c is a
3652 hack, but it's easier than exporting everything which would be
3655 struct aout_link_hash_entry *h;
3657 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3658 false, false, false);
3660 aout_link_write_other_symbol (h, &aout_info);
3663 /* The most time efficient way to do the link would be to read all
3664 the input object files into memory and then sort out the
3665 information into the output file. Unfortunately, that will
3666 probably use too much memory. Another method would be to step
3667 through everything that composes the text section and write it
3668 out, and then everything that composes the data section and write
3669 it out, and then write out the relocs, and then write out the
3670 symbols. Unfortunately, that requires reading stuff from each
3671 input file several times, and we will not be able to keep all the
3672 input files open simultaneously, and reopening them will be slow.
3674 What we do is basically process one input file at a time. We do
3675 everything we need to do with an input file once--copy over the
3676 section contents, handle the relocation information, and write
3677 out the symbols--and then we throw away the information we read
3678 from it. This approach requires a lot of lseeks of the output
3679 file, which is unfortunate but still faster than reopening a lot
3682 We use the output_has_begun field of the input BFDs to see
3683 whether we have already handled it. */
3684 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3685 sub->output_has_begun = false;
3687 /* Mark all sections which are to be included in the link. This
3688 will normally be every section. We need to do this so that we
3689 can identify any sections which the linker has decided to not
3691 for (o = abfd->sections; o != NULL; o = o->next)
3693 for (p = o->link_order_head; p != NULL; p = p->next)
3695 if (p->type == bfd_indirect_link_order)
3696 p->u.indirect.section->linker_mark = true;
3700 have_link_order_relocs = false;
3701 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3703 for (p = o->link_order_head;
3704 p != (struct bfd_link_order *) NULL;
3707 if (p->type == bfd_indirect_link_order
3708 && (bfd_get_flavour (p->u.indirect.section->owner)
3709 == bfd_target_aout_flavour))
3713 input_bfd = p->u.indirect.section->owner;
3714 if (! input_bfd->output_has_begun)
3716 if (! aout_link_input_bfd (&aout_info, input_bfd))
3718 input_bfd->output_has_begun = true;
3721 else if (p->type == bfd_section_reloc_link_order
3722 || p->type == bfd_symbol_reloc_link_order)
3724 /* These are handled below. */
3725 have_link_order_relocs = true;
3729 if (! _bfd_default_link_order (abfd, info, o, p))
3735 /* Write out any symbols that we have not already written out. */
3736 aout_link_hash_traverse (aout_hash_table (info),
3737 aout_link_write_other_symbol,
3740 /* Now handle any relocs we were asked to create by the linker.
3741 These did not come from any input file. We must do these after
3742 we have written out all the symbols, so that we know the symbol
3744 if (have_link_order_relocs)
3746 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3748 for (p = o->link_order_head;
3749 p != (struct bfd_link_order *) NULL;
3752 if (p->type == bfd_section_reloc_link_order
3753 || p->type == bfd_symbol_reloc_link_order)
3755 if (! aout_link_reloc_link_order (&aout_info, o, p))
3762 if (aout_info.contents != NULL)
3764 free (aout_info.contents);
3765 aout_info.contents = NULL;
3767 if (aout_info.relocs != NULL)
3769 free (aout_info.relocs);
3770 aout_info.relocs = NULL;
3772 if (aout_info.symbol_map != NULL)
3774 free (aout_info.symbol_map);
3775 aout_info.symbol_map = NULL;
3777 if (aout_info.output_syms != NULL)
3779 free (aout_info.output_syms);
3780 aout_info.output_syms = NULL;
3782 if (includes_hash_initialized)
3784 bfd_hash_table_free (&aout_info.includes.root);
3785 includes_hash_initialized = false;
3788 /* Finish up any dynamic linking we may be doing. */
3789 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3791 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3795 /* Update the header information. */
3796 abfd->symcount = obj_aout_external_sym_count (abfd);
3797 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3798 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3799 obj_textsec (abfd)->reloc_count =
3800 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3801 obj_datasec (abfd)->reloc_count =
3802 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3804 /* Write out the string table. */
3805 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3807 return emit_stringtab (abfd, aout_info.strtab);
3810 if (aout_info.contents != NULL)
3811 free (aout_info.contents);
3812 if (aout_info.relocs != NULL)
3813 free (aout_info.relocs);
3814 if (aout_info.symbol_map != NULL)
3815 free (aout_info.symbol_map);
3816 if (aout_info.output_syms != NULL)
3817 free (aout_info.output_syms);
3818 if (includes_hash_initialized)
3819 bfd_hash_table_free (&aout_info.includes.root);
3823 /* Link an a.out input BFD into the output file. */
3826 aout_link_input_bfd (finfo, input_bfd)
3827 struct aout_final_link_info *finfo;
3830 bfd_size_type sym_count;
3832 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3834 /* If this is a dynamic object, it may need special handling. */
3835 if ((input_bfd->flags & DYNAMIC) != 0
3836 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3838 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3839 (finfo->info, input_bfd));
3842 /* Get the symbols. We probably have them already, unless
3843 finfo->info->keep_memory is false. */
3844 if (! aout_get_external_symbols (input_bfd))
3847 sym_count = obj_aout_external_sym_count (input_bfd);
3849 /* Write out the symbols and get a map of the new indices. The map
3850 is placed into finfo->symbol_map. */
3851 if (! aout_link_write_symbols (finfo, input_bfd))
3854 /* Relocate and write out the sections. These functions use the
3855 symbol map created by aout_link_write_symbols. The linker_mark
3856 field will be set if these sections are to be included in the
3857 link, which will normally be the case. */
3858 if (obj_textsec (input_bfd)->linker_mark)
3860 if (! aout_link_input_section (finfo, input_bfd,
3861 obj_textsec (input_bfd),
3863 exec_hdr (input_bfd)->a_trsize))
3866 if (obj_datasec (input_bfd)->linker_mark)
3868 if (! aout_link_input_section (finfo, input_bfd,
3869 obj_datasec (input_bfd),
3871 exec_hdr (input_bfd)->a_drsize))
3875 /* If we are not keeping memory, we don't need the symbols any
3876 longer. We still need them if we are keeping memory, because the
3877 strings in the hash table point into them. */
3878 if (! finfo->info->keep_memory)
3880 if (! aout_link_free_symbols (input_bfd))
3887 /* Adjust and write out the symbols for an a.out file. Set the new
3888 symbol indices into a symbol_map. */
3891 aout_link_write_symbols (finfo, input_bfd)
3892 struct aout_final_link_info *finfo;
3896 bfd_size_type sym_count;
3898 enum bfd_link_strip strip;
3899 enum bfd_link_discard discard;
3900 struct external_nlist *outsym;
3901 bfd_size_type strtab_index;
3902 register struct external_nlist *sym;
3903 struct external_nlist *sym_end;
3904 struct aout_link_hash_entry **sym_hash;
3909 output_bfd = finfo->output_bfd;
3910 sym_count = obj_aout_external_sym_count (input_bfd);
3911 strings = obj_aout_external_strings (input_bfd);
3912 strip = finfo->info->strip;
3913 discard = finfo->info->discard;
3914 outsym = finfo->output_syms;
3916 /* First write out a symbol for this object file, unless we are
3917 discarding such symbols. */
3918 if (strip != strip_all
3919 && (strip != strip_some
3920 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3921 false, false) != NULL)
3922 && discard != discard_all)
3924 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3925 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3926 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3927 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
3928 input_bfd->filename, false);
3929 if (strtab_index == (bfd_size_type) -1)
3931 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
3932 PUT_WORD (output_bfd,
3933 (bfd_get_section_vma (output_bfd,
3934 obj_textsec (input_bfd)->output_section)
3935 + obj_textsec (input_bfd)->output_offset),
3937 ++obj_aout_external_sym_count (output_bfd);
3943 sym = obj_aout_external_syms (input_bfd);
3944 sym_end = sym + sym_count;
3945 sym_hash = obj_aout_sym_hashes (input_bfd);
3946 symbol_map = finfo->symbol_map;
3947 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
3948 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3952 struct aout_link_hash_entry *h;
3958 /* We set *symbol_map to 0 above for all symbols. If it has
3959 already been set to -1 for this symbol, it means that we are
3960 discarding it because it appears in a duplicate header file.
3961 See the N_BINCL code below. */
3962 if (*symbol_map == -1)
3965 /* Initialize *symbol_map to -1, which means that the symbol was
3966 not copied into the output file. We will change it later if
3967 we do copy the symbol over. */
3970 type = bfd_h_get_8 (input_bfd, sym->e_type);
3971 name = strings + GET_WORD (input_bfd, sym->e_strx);
3977 /* Pass this symbol through. It is the target of an
3978 indirect or warning symbol. */
3979 val = GET_WORD (input_bfd, sym->e_value);
3984 /* Skip this symbol, which is the target of an indirect
3985 symbol that we have changed to no longer be an indirect
3992 struct aout_link_hash_entry *hresolve;
3994 /* We have saved the hash table entry for this symbol, if
3995 there is one. Note that we could just look it up again
3996 in the hash table, provided we first check that it is an
4000 /* Use the name from the hash table, in case the symbol was
4003 name = h->root.root.string;
4005 /* If this is an indirect or warning symbol, then change
4006 hresolve to the base symbol. We also change *sym_hash so
4007 that the relocation routines relocate against the real
4010 if (h != (struct aout_link_hash_entry *) NULL
4011 && (h->root.type == bfd_link_hash_indirect
4012 || h->root.type == bfd_link_hash_warning))
4014 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4015 while (hresolve->root.type == bfd_link_hash_indirect
4016 || hresolve->root.type == bfd_link_hash_warning)
4017 hresolve = ((struct aout_link_hash_entry *)
4018 hresolve->root.u.i.link);
4019 *sym_hash = hresolve;
4022 /* If the symbol has already been written out, skip it. */
4023 if (h != (struct aout_link_hash_entry *) NULL
4024 && h->root.type != bfd_link_hash_warning
4027 if ((type & N_TYPE) == N_INDR
4028 || type == N_WARNING)
4030 *symbol_map = h->indx;
4034 /* See if we are stripping this symbol. */
4040 case strip_debugger:
4041 if ((type & N_STAB) != 0)
4045 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4055 if (h != (struct aout_link_hash_entry *) NULL)
4060 /* Get the value of the symbol. */
4061 if ((type & N_TYPE) == N_TEXT
4063 symsec = obj_textsec (input_bfd);
4064 else if ((type & N_TYPE) == N_DATA
4066 symsec = obj_datasec (input_bfd);
4067 else if ((type & N_TYPE) == N_BSS
4069 symsec = obj_bsssec (input_bfd);
4070 else if ((type & N_TYPE) == N_ABS
4072 symsec = bfd_abs_section_ptr;
4073 else if (((type & N_TYPE) == N_INDR
4074 && (hresolve == (struct aout_link_hash_entry *) NULL
4075 || (hresolve->root.type != bfd_link_hash_defined
4076 && hresolve->root.type != bfd_link_hash_defweak
4077 && hresolve->root.type != bfd_link_hash_common)))
4078 || type == N_WARNING)
4080 /* Pass the next symbol through unchanged. The
4081 condition above for indirect symbols is so that if
4082 the indirect symbol was defined, we output it with
4083 the correct definition so the debugger will
4086 val = GET_WORD (input_bfd, sym->e_value);
4089 else if ((type & N_STAB) != 0)
4091 val = GET_WORD (input_bfd, sym->e_value);
4096 /* If we get here with an indirect symbol, it means that
4097 we are outputting it with a real definition. In such
4098 a case we do not want to output the next symbol,
4099 which is the target of the indirection. */
4100 if ((type & N_TYPE) == N_INDR)
4105 /* We need to get the value from the hash table. We use
4106 hresolve so that if we have defined an indirect
4107 symbol we output the final definition. */
4108 if (h == (struct aout_link_hash_entry *) NULL)
4110 switch (type & N_TYPE)
4113 symsec = obj_textsec (input_bfd);
4116 symsec = obj_datasec (input_bfd);
4119 symsec = obj_bsssec (input_bfd);
4122 symsec = bfd_abs_section_ptr;
4129 else if (hresolve->root.type == bfd_link_hash_defined
4130 || hresolve->root.type == bfd_link_hash_defweak)
4132 asection *input_section;
4133 asection *output_section;
4135 /* This case usually means a common symbol which was
4136 turned into a defined symbol. */
4137 input_section = hresolve->root.u.def.section;
4138 output_section = input_section->output_section;
4139 BFD_ASSERT (bfd_is_abs_section (output_section)
4140 || output_section->owner == output_bfd);
4141 val = (hresolve->root.u.def.value
4142 + bfd_get_section_vma (output_bfd, output_section)
4143 + input_section->output_offset);
4145 /* Get the correct type based on the section. If
4146 this is a constructed set, force it to be
4147 globally visible. */
4156 if (output_section == obj_textsec (output_bfd))
4157 type |= (hresolve->root.type == bfd_link_hash_defined
4160 else if (output_section == obj_datasec (output_bfd))
4161 type |= (hresolve->root.type == bfd_link_hash_defined
4164 else if (output_section == obj_bsssec (output_bfd))
4165 type |= (hresolve->root.type == bfd_link_hash_defined
4169 type |= (hresolve->root.type == bfd_link_hash_defined
4173 else if (hresolve->root.type == bfd_link_hash_common)
4174 val = hresolve->root.u.c.size;
4175 else if (hresolve->root.type == bfd_link_hash_undefweak)
4183 if (symsec != (asection *) NULL)
4184 val = (symsec->output_section->vma
4185 + symsec->output_offset
4186 + (GET_WORD (input_bfd, sym->e_value)
4189 /* If this is a global symbol set the written flag, and if
4190 it is a local symbol see if we should discard it. */
4191 if (h != (struct aout_link_hash_entry *) NULL)
4194 h->indx = obj_aout_external_sym_count (output_bfd);
4196 else if ((type & N_TYPE) != N_SETT
4197 && (type & N_TYPE) != N_SETD
4198 && (type & N_TYPE) != N_SETB
4199 && (type & N_TYPE) != N_SETA)
4206 if (*name == *finfo->info->lprefix
4207 && (finfo->info->lprefix_len == 1
4208 || strncmp (name, finfo->info->lprefix,
4209 finfo->info->lprefix_len) == 0))
4223 /* An N_BINCL symbol indicates the start of the stabs
4224 entries for a header file. We need to scan ahead to the
4225 next N_EINCL symbol, ignoring nesting, adding up all the
4226 characters in the symbol names, not including the file
4227 numbers in types (the first number after an open
4229 if (type == N_BINCL)
4231 struct external_nlist *incl_sym;
4233 struct aout_link_includes_entry *incl_entry;
4234 struct aout_link_includes_totals *t;
4238 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4242 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4243 if (incl_type == N_EINCL)
4249 else if (incl_type == N_BINCL)
4255 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4256 for (; *s != '\0'; s++)
4261 /* Skip the file number. */
4263 while (isdigit ((unsigned char) *s))
4271 /* If we have already included a header file with the
4272 same value, then replace this one with an N_EXCL
4274 copy = ! finfo->info->keep_memory;
4275 incl_entry = aout_link_includes_lookup (&finfo->includes,
4277 if (incl_entry == NULL)
4279 for (t = incl_entry->totals; t != NULL; t = t->next)
4280 if (t->total == val)
4284 /* This is the first time we have seen this header
4285 file with this set of stabs strings. */
4286 t = ((struct aout_link_includes_totals *)
4287 bfd_hash_allocate (&finfo->includes.root,
4292 t->next = incl_entry->totals;
4293 incl_entry->totals = t;
4299 /* This is a duplicate header file. We must change
4300 it to be an N_EXCL entry, and mark all the
4301 included symbols to prevent outputting them. */
4305 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4307 incl_sym++, incl_map++)
4311 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4312 if (incl_type == N_EINCL)
4321 else if (incl_type == N_BINCL)
4330 /* Copy this symbol into the list of symbols we are going to
4332 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4333 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4335 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4338 if (! finfo->info->keep_memory)
4340 /* name points into a string table which we are going to
4341 free. If there is a hash table entry, use that string.
4342 Otherwise, copy name into memory. */
4343 if (h != (struct aout_link_hash_entry *) NULL)
4344 name = h->root.root.string;
4348 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4350 if (strtab_index == (bfd_size_type) -1)
4352 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4353 PUT_WORD (output_bfd, val, outsym->e_value);
4354 *symbol_map = obj_aout_external_sym_count (output_bfd);
4355 ++obj_aout_external_sym_count (output_bfd);
4359 /* Write out the output symbols we have just constructed. */
4360 if (outsym > finfo->output_syms)
4362 bfd_size_type outsym_count;
4364 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4366 outsym_count = outsym - finfo->output_syms;
4367 if (bfd_write ((PTR) finfo->output_syms,
4368 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4369 (bfd_size_type) outsym_count, output_bfd)
4370 != outsym_count * EXTERNAL_NLIST_SIZE)
4372 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4378 /* Write out a symbol that was not associated with an a.out input
4382 aout_link_write_other_symbol (h, data)
4383 struct aout_link_hash_entry *h;
4386 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4390 struct external_nlist outsym;
4393 output_bfd = finfo->output_bfd;
4395 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4397 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4398 (output_bfd, finfo->info, h)))
4400 /* FIXME: No way to handle errors. */
4410 /* An indx of -2 means the symbol must be written. */
4412 && (finfo->info->strip == strip_all
4413 || (finfo->info->strip == strip_some
4414 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4415 false, false) == NULL)))
4418 switch (h->root.type)
4422 /* Avoid variable not initialized warnings. */
4424 case bfd_link_hash_new:
4425 /* This can happen for set symbols when sets are not being
4428 case bfd_link_hash_undefined:
4429 type = N_UNDF | N_EXT;
4432 case bfd_link_hash_defined:
4433 case bfd_link_hash_defweak:
4437 sec = h->root.u.def.section->output_section;
4438 BFD_ASSERT (bfd_is_abs_section (sec)
4439 || sec->owner == output_bfd);
4440 if (sec == obj_textsec (output_bfd))
4441 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4442 else if (sec == obj_datasec (output_bfd))
4443 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4444 else if (sec == obj_bsssec (output_bfd))
4445 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4447 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4449 val = (h->root.u.def.value
4451 + h->root.u.def.section->output_offset);
4454 case bfd_link_hash_common:
4455 type = N_UNDF | N_EXT;
4456 val = h->root.u.c.size;
4458 case bfd_link_hash_undefweak:
4461 case bfd_link_hash_indirect:
4462 case bfd_link_hash_warning:
4463 /* FIXME: Ignore these for now. The circumstances under which
4464 they should be written out are not clear to me. */
4468 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4469 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4470 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4471 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4473 if (indx == (bfd_size_type) -1)
4475 /* FIXME: No way to handle errors. */
4478 PUT_WORD (output_bfd, indx, outsym.e_strx);
4479 PUT_WORD (output_bfd, val, outsym.e_value);
4481 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4482 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4483 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4485 /* FIXME: No way to handle errors. */
4489 finfo->symoff += EXTERNAL_NLIST_SIZE;
4490 h->indx = obj_aout_external_sym_count (output_bfd);
4491 ++obj_aout_external_sym_count (output_bfd);
4496 /* Link an a.out section into the output file. */
4499 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4501 struct aout_final_link_info *finfo;
4503 asection *input_section;
4504 file_ptr *reloff_ptr;
4505 bfd_size_type rel_size;
4507 bfd_size_type input_size;
4510 /* Get the section contents. */
4511 input_size = bfd_section_size (input_bfd, input_section);
4512 if (! bfd_get_section_contents (input_bfd, input_section,
4513 (PTR) finfo->contents,
4514 (file_ptr) 0, input_size))
4517 /* Read in the relocs if we haven't already done it. */
4518 if (aout_section_data (input_section) != NULL
4519 && aout_section_data (input_section)->relocs != NULL)
4520 relocs = aout_section_data (input_section)->relocs;
4523 relocs = finfo->relocs;
4526 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4527 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4532 /* Relocate the section contents. */
4533 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4535 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4536 (struct reloc_std_external *) relocs,
4537 rel_size, finfo->contents))
4542 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4543 (struct reloc_ext_external *) relocs,
4544 rel_size, finfo->contents))
4548 /* Write out the section contents. */
4549 if (! bfd_set_section_contents (finfo->output_bfd,
4550 input_section->output_section,
4551 (PTR) finfo->contents,
4552 input_section->output_offset,
4556 /* If we are producing relocateable output, the relocs were
4557 modified, and we now write them out. */
4558 if (finfo->info->relocateable && rel_size > 0)
4560 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4562 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4565 *reloff_ptr += rel_size;
4567 /* Assert that the relocs have not run into the symbols, and
4568 that if these are the text relocs they have not run into the
4570 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4571 && (reloff_ptr != &finfo->treloff
4573 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4579 /* Get the section corresponding to a reloc index. */
4581 static INLINE asection *
4582 aout_reloc_index_to_section (abfd, indx)
4586 switch (indx & N_TYPE)
4589 return obj_textsec (abfd);
4591 return obj_datasec (abfd);
4593 return obj_bsssec (abfd);
4596 return bfd_abs_section_ptr;
4602 /* Relocate an a.out section using standard a.out relocs. */
4605 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4607 struct aout_final_link_info *finfo;
4609 asection *input_section;
4610 struct reloc_std_external *relocs;
4611 bfd_size_type rel_size;
4614 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4616 struct aout_link_hash_entry *,
4617 PTR, bfd_byte *, boolean *,
4620 boolean relocateable;
4621 struct external_nlist *syms;
4623 struct aout_link_hash_entry **sym_hashes;
4625 bfd_size_type reloc_count;
4626 register struct reloc_std_external *rel;
4627 struct reloc_std_external *rel_end;
4629 output_bfd = finfo->output_bfd;
4630 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4632 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4633 BFD_ASSERT (input_bfd->xvec->header_byteorder
4634 == output_bfd->xvec->header_byteorder);
4636 relocateable = finfo->info->relocateable;
4637 syms = obj_aout_external_syms (input_bfd);
4638 strings = obj_aout_external_strings (input_bfd);
4639 sym_hashes = obj_aout_sym_hashes (input_bfd);
4640 symbol_map = finfo->symbol_map;
4642 reloc_count = rel_size / RELOC_STD_SIZE;
4644 rel_end = rel + reloc_count;
4645 for (; rel < rel_end; rel++)
4652 reloc_howto_type *howto;
4653 struct aout_link_hash_entry *h = NULL;
4655 bfd_reloc_status_type r;
4657 r_addr = GET_SWORD (input_bfd, rel->r_address);
4659 #ifdef MY_reloc_howto
4660 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4666 unsigned int howto_idx;
4668 if (bfd_header_big_endian (input_bfd))
4670 r_index = ((rel->r_index[0] << 16)
4671 | (rel->r_index[1] << 8)
4673 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4674 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4675 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4676 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4677 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4678 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4679 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4683 r_index = ((rel->r_index[2] << 16)
4684 | (rel->r_index[1] << 8)
4686 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4687 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4688 r_baserel = (0 != (rel->r_type[0]
4689 & RELOC_STD_BITS_BASEREL_LITTLE));
4690 r_jmptable= (0 != (rel->r_type[0]
4691 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4692 r_relative= (0 != (rel->r_type[0]
4693 & RELOC_STD_BITS_RELATIVE_LITTLE));
4694 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4695 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4698 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4699 + 16 * r_jmptable + 32 * r_relative);
4700 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4701 howto = howto_table_std + howto_idx;
4707 /* We are generating a relocateable output file, and must
4708 modify the reloc accordingly. */
4711 /* If we know the symbol this relocation is against,
4712 convert it into a relocation against a section. This
4713 is what the native linker does. */
4714 h = sym_hashes[r_index];
4715 if (h != (struct aout_link_hash_entry *) NULL
4716 && (h->root.type == bfd_link_hash_defined
4717 || h->root.type == bfd_link_hash_defweak))
4719 asection *output_section;
4721 /* Change the r_extern value. */
4722 if (bfd_header_big_endian (output_bfd))
4723 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4725 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4727 /* Compute a new r_index. */
4728 output_section = h->root.u.def.section->output_section;
4729 if (output_section == obj_textsec (output_bfd))
4731 else if (output_section == obj_datasec (output_bfd))
4733 else if (output_section == obj_bsssec (output_bfd))
4738 /* Add the symbol value and the section VMA to the
4739 addend stored in the contents. */
4740 relocation = (h->root.u.def.value
4741 + output_section->vma
4742 + h->root.u.def.section->output_offset);
4746 /* We must change r_index according to the symbol
4748 r_index = symbol_map[r_index];
4754 /* We decided to strip this symbol, but it
4755 turns out that we can't. Note that we
4756 lose the other and desc information here.
4757 I don't think that will ever matter for a
4763 if (! aout_link_write_other_symbol (h,
4773 name = strings + GET_WORD (input_bfd,
4774 syms[r_index].e_strx);
4775 if (! ((*finfo->info->callbacks->unattached_reloc)
4776 (finfo->info, name, input_bfd, input_section,
4786 /* Write out the new r_index value. */
4787 if (bfd_header_big_endian (output_bfd))
4789 rel->r_index[0] = r_index >> 16;
4790 rel->r_index[1] = r_index >> 8;
4791 rel->r_index[2] = r_index;
4795 rel->r_index[2] = r_index >> 16;
4796 rel->r_index[1] = r_index >> 8;
4797 rel->r_index[0] = r_index;
4804 /* This is a relocation against a section. We must
4805 adjust by the amount that the section moved. */
4806 section = aout_reloc_index_to_section (input_bfd, r_index);
4807 relocation = (section->output_section->vma
4808 + section->output_offset
4812 /* Change the address of the relocation. */
4813 PUT_WORD (output_bfd,
4814 r_addr + input_section->output_offset,
4817 /* Adjust a PC relative relocation by removing the reference
4818 to the original address in the section and including the
4819 reference to the new address. */
4821 relocation -= (input_section->output_section->vma
4822 + input_section->output_offset
4823 - input_section->vma);
4825 #ifdef MY_relocatable_reloc
4826 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4829 if (relocation == 0)
4832 r = MY_relocate_contents (howto,
4833 input_bfd, relocation,
4840 /* We are generating an executable, and must do a full
4845 h = sym_hashes[r_index];
4847 if (h != (struct aout_link_hash_entry *) NULL
4848 && (h->root.type == bfd_link_hash_defined
4849 || h->root.type == bfd_link_hash_defweak))
4851 relocation = (h->root.u.def.value
4852 + h->root.u.def.section->output_section->vma
4853 + h->root.u.def.section->output_offset);
4855 else if (h != (struct aout_link_hash_entry *) NULL
4856 && h->root.type == bfd_link_hash_undefweak)
4868 section = aout_reloc_index_to_section (input_bfd, r_index);
4869 relocation = (section->output_section->vma
4870 + section->output_offset
4873 relocation += input_section->vma;
4876 if (check_dynamic_reloc != NULL)
4880 if (! ((*check_dynamic_reloc)
4881 (finfo->info, input_bfd, input_section, h,
4882 (PTR) rel, contents, &skip, &relocation)))
4888 /* Now warn if a global symbol is undefined. We could not
4889 do this earlier, because check_dynamic_reloc might want
4890 to skip this reloc. */
4891 if (hundef && ! finfo->info->shared && ! r_baserel)
4896 name = h->root.root.string;
4898 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4899 if (! ((*finfo->info->callbacks->undefined_symbol)
4900 (finfo->info, name, input_bfd, input_section, r_addr)))
4904 r = MY_final_link_relocate (howto,
4905 input_bfd, input_section,
4906 contents, r_addr, relocation,
4910 if (r != bfd_reloc_ok)
4915 case bfd_reloc_outofrange:
4917 case bfd_reloc_overflow:
4922 name = h->root.root.string;
4924 name = strings + GET_WORD (input_bfd,
4925 syms[r_index].e_strx);
4930 s = aout_reloc_index_to_section (input_bfd, r_index);
4931 name = bfd_section_name (input_bfd, s);
4933 if (! ((*finfo->info->callbacks->reloc_overflow)
4934 (finfo->info, name, howto->name,
4935 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4946 /* Relocate an a.out section using extended a.out relocs. */
4949 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4951 struct aout_final_link_info *finfo;
4953 asection *input_section;
4954 struct reloc_ext_external *relocs;
4955 bfd_size_type rel_size;
4958 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4960 struct aout_link_hash_entry *,
4961 PTR, bfd_byte *, boolean *,
4964 boolean relocateable;
4965 struct external_nlist *syms;
4967 struct aout_link_hash_entry **sym_hashes;
4969 bfd_size_type reloc_count;
4970 register struct reloc_ext_external *rel;
4971 struct reloc_ext_external *rel_end;
4973 output_bfd = finfo->output_bfd;
4974 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4976 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4977 BFD_ASSERT (input_bfd->xvec->header_byteorder
4978 == output_bfd->xvec->header_byteorder);
4980 relocateable = finfo->info->relocateable;
4981 syms = obj_aout_external_syms (input_bfd);
4982 strings = obj_aout_external_strings (input_bfd);
4983 sym_hashes = obj_aout_sym_hashes (input_bfd);
4984 symbol_map = finfo->symbol_map;
4986 reloc_count = rel_size / RELOC_EXT_SIZE;
4988 rel_end = rel + reloc_count;
4989 for (; rel < rel_end; rel++)
4994 unsigned int r_type;
4996 struct aout_link_hash_entry *h = NULL;
4997 asection *r_section = NULL;
5000 r_addr = GET_SWORD (input_bfd, rel->r_address);
5002 if (bfd_header_big_endian (input_bfd))
5004 r_index = ((rel->r_index[0] << 16)
5005 | (rel->r_index[1] << 8)
5007 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5008 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5009 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5013 r_index = ((rel->r_index[2] << 16)
5014 | (rel->r_index[1] << 8)
5016 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5017 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5018 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5021 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5023 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5027 /* We are generating a relocateable output file, and must
5028 modify the reloc accordingly. */
5031 /* If we know the symbol this relocation is against,
5032 convert it into a relocation against a section. This
5033 is what the native linker does. */
5034 h = sym_hashes[r_index];
5035 if (h != (struct aout_link_hash_entry *) NULL
5036 && (h->root.type == bfd_link_hash_defined
5037 || h->root.type == bfd_link_hash_defweak))
5039 asection *output_section;
5041 /* Change the r_extern value. */
5042 if (bfd_header_big_endian (output_bfd))
5043 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5045 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5047 /* Compute a new r_index. */
5048 output_section = h->root.u.def.section->output_section;
5049 if (output_section == obj_textsec (output_bfd))
5051 else if (output_section == obj_datasec (output_bfd))
5053 else if (output_section == obj_bsssec (output_bfd))
5058 /* Add the symbol value and the section VMA to the
5060 relocation = (h->root.u.def.value
5061 + output_section->vma
5062 + h->root.u.def.section->output_offset);
5064 /* Now RELOCATION is the VMA of the final
5065 destination. If this is a PC relative reloc,
5066 then ADDEND is the negative of the source VMA.
5067 We want to set ADDEND to the difference between
5068 the destination VMA and the source VMA, which
5069 means we must adjust RELOCATION by the change in
5070 the source VMA. This is done below. */
5074 /* We must change r_index according to the symbol
5076 r_index = symbol_map[r_index];
5082 /* We decided to strip this symbol, but it
5083 turns out that we can't. Note that we
5084 lose the other and desc information here.
5085 I don't think that will ever matter for a
5091 if (! aout_link_write_other_symbol (h,
5101 name = strings + GET_WORD (input_bfd,
5102 syms[r_index].e_strx);
5103 if (! ((*finfo->info->callbacks->unattached_reloc)
5104 (finfo->info, name, input_bfd, input_section,
5113 /* If this is a PC relative reloc, then the addend
5114 is the negative of the source VMA. We must
5115 adjust it by the change in the source VMA. This
5119 /* Write out the new r_index value. */
5120 if (bfd_header_big_endian (output_bfd))
5122 rel->r_index[0] = r_index >> 16;
5123 rel->r_index[1] = r_index >> 8;
5124 rel->r_index[2] = r_index;
5128 rel->r_index[2] = r_index >> 16;
5129 rel->r_index[1] = r_index >> 8;
5130 rel->r_index[0] = r_index;
5135 /* This is a relocation against a section. We must
5136 adjust by the amount that the section moved. */
5137 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5138 relocation = (r_section->output_section->vma
5139 + r_section->output_offset
5142 /* If this is a PC relative reloc, then the addend is
5143 the difference in VMA between the destination and the
5144 source. We have just adjusted for the change in VMA
5145 of the destination, so we must also adjust by the
5146 change in VMA of the source. This is done below. */
5149 /* As described above, we must always adjust a PC relative
5150 reloc by the change in VMA of the source. */
5151 if (howto_table_ext[r_type].pc_relative)
5152 relocation -= (input_section->output_section->vma
5153 + input_section->output_offset
5154 - input_section->vma);
5156 /* Change the addend if necessary. */
5157 if (relocation != 0)
5158 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5160 /* Change the address of the relocation. */
5161 PUT_WORD (output_bfd,
5162 r_addr + input_section->output_offset,
5168 bfd_reloc_status_type r;
5170 /* We are generating an executable, and must do a full
5175 h = sym_hashes[r_index];
5177 if (h != (struct aout_link_hash_entry *) NULL
5178 && (h->root.type == bfd_link_hash_defined
5179 || h->root.type == bfd_link_hash_defweak))
5181 relocation = (h->root.u.def.value
5182 + h->root.u.def.section->output_section->vma
5183 + h->root.u.def.section->output_offset);
5185 else if (h != (struct aout_link_hash_entry *) NULL
5186 && h->root.type == bfd_link_hash_undefweak)
5194 else if (r_type == RELOC_BASE10
5195 || r_type == RELOC_BASE13
5196 || r_type == RELOC_BASE22)
5198 struct external_nlist *sym;
5201 /* For base relative relocs, r_index is always an index
5202 into the symbol table, even if r_extern is 0. */
5203 sym = syms + r_index;
5204 type = bfd_h_get_8 (input_bfd, sym->e_type);
5205 if ((type & N_TYPE) == N_TEXT
5207 r_section = obj_textsec (input_bfd);
5208 else if ((type & N_TYPE) == N_DATA
5210 r_section = obj_datasec (input_bfd);
5211 else if ((type & N_TYPE) == N_BSS
5213 r_section = obj_bsssec (input_bfd);
5214 else if ((type & N_TYPE) == N_ABS
5216 r_section = bfd_abs_section_ptr;
5219 relocation = (r_section->output_section->vma
5220 + r_section->output_offset
5221 + (GET_WORD (input_bfd, sym->e_value)
5226 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5228 /* If this is a PC relative reloc, then R_ADDEND is the
5229 difference between the two vmas, or
5230 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5232 old_dest_sec == section->vma
5234 old_src_sec == input_section->vma
5236 old_src_off == r_addr
5238 _bfd_final_link_relocate expects RELOCATION +
5239 R_ADDEND to be the VMA of the destination minus
5240 r_addr (the minus r_addr is because this relocation
5241 is not pcrel_offset, which is a bit confusing and
5242 should, perhaps, be changed), or
5245 new_dest_sec == output_section->vma + output_offset
5246 We arrange for this to happen by setting RELOCATION to
5247 new_dest_sec + old_src_sec - old_dest_sec
5249 If this is not a PC relative reloc, then R_ADDEND is
5250 simply the VMA of the destination, so we set
5251 RELOCATION to the change in the destination VMA, or
5252 new_dest_sec - old_dest_sec
5254 relocation = (r_section->output_section->vma
5255 + r_section->output_offset
5257 if (howto_table_ext[r_type].pc_relative)
5258 relocation += input_section->vma;
5261 if (check_dynamic_reloc != NULL)
5265 if (! ((*check_dynamic_reloc)
5266 (finfo->info, input_bfd, input_section, h,
5267 (PTR) rel, contents, &skip, &relocation)))
5273 /* Now warn if a global symbol is undefined. We could not
5274 do this earlier, because check_dynamic_reloc might want
5275 to skip this reloc. */
5277 && ! finfo->info->shared
5278 && r_type != RELOC_BASE10
5279 && r_type != RELOC_BASE13
5280 && r_type != RELOC_BASE22)
5285 name = h->root.root.string;
5287 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5288 if (! ((*finfo->info->callbacks->undefined_symbol)
5289 (finfo->info, name, input_bfd, input_section, r_addr)))
5293 r = MY_final_link_relocate (howto_table_ext + r_type,
5294 input_bfd, input_section,
5295 contents, r_addr, relocation,
5297 if (r != bfd_reloc_ok)
5302 case bfd_reloc_outofrange:
5304 case bfd_reloc_overflow:
5309 name = h->root.root.string;
5311 || r_type == RELOC_BASE10
5312 || r_type == RELOC_BASE13
5313 || r_type == RELOC_BASE22)
5314 name = strings + GET_WORD (input_bfd,
5315 syms[r_index].e_strx);
5320 s = aout_reloc_index_to_section (input_bfd, r_index);
5321 name = bfd_section_name (input_bfd, s);
5323 if (! ((*finfo->info->callbacks->reloc_overflow)
5324 (finfo->info, name, howto_table_ext[r_type].name,
5325 r_addend, input_bfd, input_section, r_addr)))
5337 /* Handle a link order which is supposed to generate a reloc. */
5340 aout_link_reloc_link_order (finfo, o, p)
5341 struct aout_final_link_info *finfo;
5343 struct bfd_link_order *p;
5345 struct bfd_link_order_reloc *pr;
5348 reloc_howto_type *howto;
5349 file_ptr *reloff_ptr;
5350 struct reloc_std_external srel;
5351 struct reloc_ext_external erel;
5356 if (p->type == bfd_section_reloc_link_order)
5359 if (bfd_is_abs_section (pr->u.section))
5360 r_index = N_ABS | N_EXT;
5363 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5364 r_index = pr->u.section->target_index;
5369 struct aout_link_hash_entry *h;
5371 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5373 h = ((struct aout_link_hash_entry *)
5374 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5375 pr->u.name, false, false, true));
5376 if (h != (struct aout_link_hash_entry *) NULL
5381 /* We decided to strip this symbol, but it turns out that we
5382 can't. Note that we lose the other and desc information
5383 here. I don't think that will ever matter for a global
5387 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5393 if (! ((*finfo->info->callbacks->unattached_reloc)
5394 (finfo->info, pr->u.name, (bfd *) NULL,
5395 (asection *) NULL, (bfd_vma) 0)))
5401 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5404 bfd_set_error (bfd_error_bad_value);
5408 if (o == obj_textsec (finfo->output_bfd))
5409 reloff_ptr = &finfo->treloff;
5410 else if (o == obj_datasec (finfo->output_bfd))
5411 reloff_ptr = &finfo->dreloff;
5415 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5418 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5428 r_pcrel = howto->pc_relative;
5429 r_baserel = (howto->type & 8) != 0;
5430 r_jmptable = (howto->type & 16) != 0;
5431 r_relative = (howto->type & 32) != 0;
5432 r_length = howto->size;
5434 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5435 if (bfd_header_big_endian (finfo->output_bfd))
5437 srel.r_index[0] = r_index >> 16;
5438 srel.r_index[1] = r_index >> 8;
5439 srel.r_index[2] = r_index;
5441 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5442 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5443 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5444 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5445 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5446 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5450 srel.r_index[2] = r_index >> 16;
5451 srel.r_index[1] = r_index >> 8;
5452 srel.r_index[0] = r_index;
5454 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5455 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5456 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5457 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5458 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5459 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5463 rel_ptr = (PTR) &srel;
5465 /* We have to write the addend into the object file, since
5466 standard a.out relocs are in place. It would be more
5467 reliable if we had the current contents of the file here,
5468 rather than assuming zeroes, but we can't read the file since
5469 it was opened using bfd_openw. */
5470 if (pr->addend != 0)
5473 bfd_reloc_status_type r;
5477 size = bfd_get_reloc_size (howto);
5478 buf = (bfd_byte *) bfd_zmalloc (size);
5479 if (buf == (bfd_byte *) NULL)
5481 r = MY_relocate_contents (howto, finfo->output_bfd,
5488 case bfd_reloc_outofrange:
5490 case bfd_reloc_overflow:
5491 if (! ((*finfo->info->callbacks->reloc_overflow)
5493 (p->type == bfd_section_reloc_link_order
5494 ? bfd_section_name (finfo->output_bfd,
5497 howto->name, pr->addend, (bfd *) NULL,
5498 (asection *) NULL, (bfd_vma) 0)))
5505 ok = bfd_set_section_contents (finfo->output_bfd, o,
5507 (file_ptr) p->offset,
5516 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5518 if (bfd_header_big_endian (finfo->output_bfd))
5520 erel.r_index[0] = r_index >> 16;
5521 erel.r_index[1] = r_index >> 8;
5522 erel.r_index[2] = r_index;
5524 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5525 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5529 erel.r_index[2] = r_index >> 16;
5530 erel.r_index[1] = r_index >> 8;
5531 erel.r_index[0] = r_index;
5533 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5534 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5537 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5539 rel_ptr = (PTR) &erel;
5542 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5543 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5544 obj_reloc_entry_size (finfo->output_bfd),
5546 != obj_reloc_entry_size (finfo->output_bfd)))
5549 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5551 /* Assert that the relocs have not run into the symbols, and that n
5552 the text relocs have not run into the data relocs. */
5553 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5554 && (reloff_ptr != &finfo->treloff
5556 <= obj_datasec (finfo->output_bfd)->rel_filepos)));