1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 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 */
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
133 static boolean aout_get_external_symbols PARAMS ((bfd *));
134 static boolean translate_from_native_sym_flags
135 PARAMS ((bfd *, aout_symbol_type *));
136 static boolean translate_to_native_sym_flags
137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
144 The file @file{aoutx.h} provides for both the @emph{standard}
145 and @emph{extended} forms of a.out relocation records.
147 The standard records contain only an
148 address, a symbol index, and a type field. The extended records
149 (used on 29ks and sparcs) also have a full integer for an
153 #ifndef CTOR_TABLE_RELOC_HOWTO
154 #define CTOR_TABLE_RELOC_IDX 2
155 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
156 ? howto_table_ext : howto_table_std) \
157 + CTOR_TABLE_RELOC_IDX)
160 #ifndef MY_swap_std_reloc_in
161 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
164 #ifndef MY_swap_std_reloc_out
165 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME(aout,ext_howto_table)
177 #define howto_table_std NAME(aout,std_howto_table)
179 reloc_howto_type howto_table_ext[] =
181 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
182 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
183 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
184 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
185 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
186 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
187 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
188 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
189 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
190 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
191 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
192 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
193 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
194 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
195 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
196 HOWTO(RELOC_BASE10, 0, 2, 16, false, 0, complain_overflow_bitfield,0,"BASE10", false, 0,0x0000ffff, false),
197 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"BASE13", false, 0,0x00001fff, false),
198 HOWTO(RELOC_BASE22, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x00000000, false),
199 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
200 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
201 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
202 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
203 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
204 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
205 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
208 /* Convert standard reloc records to "arelent" format (incl byte swap). */
210 reloc_howto_type howto_table_std[] = {
211 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
212 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
213 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
214 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
215 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
216 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
217 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
218 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
219 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
220 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
221 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
222 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
228 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
236 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
237 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
245 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
248 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
251 NAME(aout,reloc_type_lookup) (abfd,code)
253 bfd_reloc_code_real_type code;
255 #define EXT(i,j) case i: return &howto_table_ext[j]
256 #define STD(i,j) case i: return &howto_table_std[j]
257 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
258 if (code == BFD_RELOC_CTOR)
259 switch (bfd_get_arch_info (abfd)->bits_per_address)
271 EXT (BFD_RELOC_32, 2);
272 EXT (BFD_RELOC_HI22, 8);
273 EXT (BFD_RELOC_LO10, 11);
274 EXT (BFD_RELOC_32_PCREL_S2, 6);
275 EXT (BFD_RELOC_SPARC_WDISP22, 7);
276 EXT (BFD_RELOC_SPARC13, 10);
277 EXT (BFD_RELOC_SPARC_GOT10, 14);
278 EXT (BFD_RELOC_SPARC_BASE13, 15);
279 EXT (BFD_RELOC_SPARC_GOT13, 15);
280 EXT (BFD_RELOC_SPARC_GOT22, 16);
281 EXT (BFD_RELOC_SPARC_PC10, 17);
282 EXT (BFD_RELOC_SPARC_PC22, 18);
283 EXT (BFD_RELOC_SPARC_WPLT30, 19);
284 default: return (reloc_howto_type *) NULL;
290 STD (BFD_RELOC_16, 1);
291 STD (BFD_RELOC_32, 2);
292 STD (BFD_RELOC_8_PCREL, 4);
293 STD (BFD_RELOC_16_PCREL, 5);
294 STD (BFD_RELOC_32_PCREL, 6);
295 STD (BFD_RELOC_16_BASEREL, 9);
296 STD (BFD_RELOC_32_BASEREL, 10);
297 default: return (reloc_howto_type *) NULL;
303 Internal entry points
306 @file{aoutx.h} exports several routines for accessing the
307 contents of an a.out file, which are gathered and exported in
308 turn by various format specific files (eg sunos.c).
314 aout_@var{size}_swap_exec_header_in
317 void aout_@var{size}_swap_exec_header_in,
319 struct external_exec *raw_bytes,
320 struct internal_exec *execp);
323 Swap the information in an executable header @var{raw_bytes} taken
324 from a raw byte stream memory image into the internal exec header
325 structure @var{execp}.
328 #ifndef NAME_swap_exec_header_in
330 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
332 struct external_exec *raw_bytes;
333 struct internal_exec *execp;
335 struct external_exec *bytes = (struct external_exec *)raw_bytes;
337 /* The internal_exec structure has some fields that are unused in this
338 configuration (IE for i960), so ensure that all such uninitialized
339 fields are zero'd out. There are places where two of these structs
340 are memcmp'd, and thus the contents do matter. */
341 memset ((PTR) execp, 0, sizeof (struct internal_exec));
342 /* Now fill in fields in the execp, from the bytes in the raw data. */
343 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
344 execp->a_text = GET_WORD (abfd, bytes->e_text);
345 execp->a_data = GET_WORD (abfd, bytes->e_data);
346 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
347 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
348 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
349 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
350 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
352 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
357 aout_@var{size}_swap_exec_header_out
360 void aout_@var{size}_swap_exec_header_out
362 struct internal_exec *execp,
363 struct external_exec *raw_bytes);
366 Swap the information in an internal exec header structure
367 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
370 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
372 struct internal_exec *execp;
373 struct external_exec *raw_bytes;
375 struct external_exec *bytes = (struct external_exec *)raw_bytes;
377 /* Now fill in fields in the raw data, from the fields in the exec struct. */
378 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
379 PUT_WORD (abfd, execp->a_text , bytes->e_text);
380 PUT_WORD (abfd, execp->a_data , bytes->e_data);
381 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
382 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
383 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
384 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
385 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
388 /* Make all the section for an a.out file. */
391 NAME(aout,make_sections) (abfd)
394 if (obj_textsec (abfd) == (asection *) NULL
395 && bfd_make_section (abfd, ".text") == (asection *) NULL)
397 if (obj_datasec (abfd) == (asection *) NULL
398 && bfd_make_section (abfd, ".data") == (asection *) NULL)
400 if (obj_bsssec (abfd) == (asection *) NULL
401 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
408 aout_@var{size}_some_aout_object_p
411 const bfd_target *aout_@var{size}_some_aout_object_p
413 const bfd_target *(*callback_to_real_object_p)());
416 Some a.out variant thinks that the file open in @var{abfd}
417 checking is an a.out file. Do some more checking, and set up
418 for access if it really is. Call back to the calling
419 environment's "finish up" function just before returning, to
420 handle any last-minute setup.
424 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
426 struct internal_exec *execp;
427 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
429 struct aout_data_struct *rawptr, *oldrawptr;
430 const bfd_target *result;
432 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
436 oldrawptr = abfd->tdata.aout_data;
437 abfd->tdata.aout_data = rawptr;
439 /* Copy the contents of the old tdata struct.
440 In particular, we want the subformat, since for hpux it was set in
441 hp300hpux.c:swap_exec_header_in and will be used in
442 hp300hpux.c:callback. */
443 if (oldrawptr != NULL)
444 *abfd->tdata.aout_data = *oldrawptr;
446 abfd->tdata.aout_data->a.hdr = &rawptr->e;
447 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
448 execp = abfd->tdata.aout_data->a.hdr;
450 /* Set the file flags */
451 abfd->flags = NO_FLAGS;
452 if (execp->a_drsize || execp->a_trsize)
453 abfd->flags |= HAS_RELOC;
454 /* Setting of EXEC_P has been deferred to the bottom of this function */
456 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
457 if (N_DYNAMIC(*execp))
458 abfd->flags |= DYNAMIC;
460 if (N_MAGIC (*execp) == ZMAGIC)
462 abfd->flags |= D_PAGED | WP_TEXT;
463 adata (abfd).magic = z_magic;
465 else if (N_MAGIC (*execp) == QMAGIC)
467 abfd->flags |= D_PAGED | WP_TEXT;
468 adata (abfd).magic = z_magic;
469 adata (abfd).subformat = q_magic_format;
471 else if (N_MAGIC (*execp) == NMAGIC)
473 abfd->flags |= WP_TEXT;
474 adata (abfd).magic = n_magic;
476 else if (N_MAGIC (*execp) == OMAGIC
477 || N_MAGIC (*execp) == BMAGIC)
478 adata (abfd).magic = o_magic;
481 /* Should have been checked with N_BADMAG before this routine
486 bfd_get_start_address (abfd) = execp->a_entry;
488 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
489 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
491 /* The default relocation entry size is that of traditional V7 Unix. */
492 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
494 /* The default symbol entry size is that of traditional Unix. */
495 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
498 bfd_init_window (&obj_aout_sym_window (abfd));
499 bfd_init_window (&obj_aout_string_window (abfd));
501 obj_aout_external_syms (abfd) = NULL;
502 obj_aout_external_strings (abfd) = NULL;
503 obj_aout_sym_hashes (abfd) = NULL;
505 if (! NAME(aout,make_sections) (abfd))
508 obj_datasec (abfd)->_raw_size = execp->a_data;
509 obj_bsssec (abfd)->_raw_size = execp->a_bss;
511 obj_textsec (abfd)->flags =
512 (execp->a_trsize != 0
513 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
514 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
515 obj_datasec (abfd)->flags =
516 (execp->a_drsize != 0
517 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
518 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
519 obj_bsssec (abfd)->flags = SEC_ALLOC;
521 #ifdef THIS_IS_ONLY_DOCUMENTATION
522 /* The common code can't fill in these things because they depend
523 on either the start address of the text segment, the rounding
524 up of virtual addresses between segments, or the starting file
525 position of the text segment -- all of which varies among different
526 versions of a.out. */
528 /* Call back to the format-dependent code to fill in the rest of the
529 fields and do any further cleanup. Things that should be filled
530 in by the callback: */
532 struct exec *execp = exec_hdr (abfd);
534 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
535 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
536 /* data and bss are already filled in since they're so standard */
538 /* The virtual memory addresses of the sections */
539 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
540 obj_datasec (abfd)->vma = N_DATADDR(*execp);
541 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
543 /* The file offsets of the sections */
544 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
545 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
547 /* The file offsets of the relocation info */
548 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
549 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
551 /* The file offsets of the string table and symbol table. */
552 obj_str_filepos (abfd) = N_STROFF (*execp);
553 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
555 /* Determine the architecture and machine type of the object file. */
556 switch (N_MACHTYPE (*exec_hdr (abfd))) {
558 abfd->obj_arch = bfd_arch_obscure;
562 adata(abfd)->page_size = TARGET_PAGE_SIZE;
563 adata(abfd)->segment_size = SEGMENT_SIZE;
564 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
568 /* The architecture is encoded in various ways in various a.out variants,
569 or is not encoded at all in some of them. The relocation size depends
570 on the architecture and the a.out variant. Finally, the return value
571 is the bfd_target vector in use. If an error occurs, return zero and
572 set bfd_error to the appropriate error code.
574 Formats such as b.out, which have additional fields in the a.out
575 header, should cope with them in this callback as well. */
576 #endif /* DOCUMENTATION */
578 result = (*callback_to_real_object_p)(abfd);
580 /* Now that the segment addresses have been worked out, take a better
581 guess at whether the file is executable. If the entry point
582 is within the text segment, assume it is. (This makes files
583 executable even if their entry point address is 0, as long as
584 their text starts at zero.). */
585 if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
586 (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
587 abfd->flags |= EXEC_P;
591 struct stat stat_buf;
593 /* The original heuristic doesn't work in some important cases.
594 The a.out file has no information about the text start
595 address. For files (like kernels) linked to non-standard
596 addresses (ld -Ttext nnn) the entry point may not be between
597 the default text start (obj_textsec(abfd)->vma) and
598 (obj_textsec(abfd)->vma) + text size. This is not just a mach
599 issue. Many kernels are loaded at non standard addresses. */
601 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
602 && ((stat_buf.st_mode & 0111) != 0))
603 abfd->flags |= EXEC_P;
605 #endif /* STAT_FOR_EXEC */
609 #if 0 /* These should be set correctly anyways. */
610 abfd->sections = obj_textsec (abfd);
611 obj_textsec (abfd)->next = obj_datasec (abfd);
612 obj_datasec (abfd)->next = obj_bsssec (abfd);
618 abfd->tdata.aout_data = oldrawptr;
625 aout_@var{size}_mkobject
628 boolean aout_@var{size}_mkobject, (bfd *abfd);
631 Initialize BFD @var{abfd} for use with a.out files.
635 NAME(aout,mkobject) (abfd)
638 struct aout_data_struct *rawptr;
640 bfd_set_error (bfd_error_system_call);
642 /* Use an intermediate variable for clarity */
643 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
648 abfd->tdata.aout_data = rawptr;
649 exec_hdr (abfd) = &(rawptr->e);
651 obj_textsec (abfd) = (asection *)NULL;
652 obj_datasec (abfd) = (asection *)NULL;
653 obj_bsssec (abfd) = (asection *)NULL;
661 aout_@var{size}_machine_type
664 enum machine_type aout_@var{size}_machine_type
665 (enum bfd_architecture arch,
666 unsigned long machine));
669 Keep track of machine architecture and machine type for
670 a.out's. Return the <<machine_type>> for a particular
671 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
672 and machine can't be represented in a.out format.
674 If the architecture is understood, machine type 0 (default)
675 is always understood.
679 NAME(aout,machine_type) (arch, machine, unknown)
680 enum bfd_architecture arch;
681 unsigned long machine;
684 enum machine_type arch_flags;
686 arch_flags = M_UNKNOWN;
692 || machine == bfd_mach_sparc
693 || machine == bfd_mach_sparc64)
694 arch_flags = M_SPARC;
699 case 0: arch_flags = M_68010; break;
700 case 68000: arch_flags = M_UNKNOWN; *unknown = false; break;
701 case 68010: arch_flags = M_68010; break;
702 case 68020: arch_flags = M_68020; break;
703 default: arch_flags = M_UNKNOWN; break;
708 if (machine == 0) arch_flags = M_386;
712 if (machine == 0) arch_flags = M_29K;
716 if (machine == 0) arch_flags = M_ARM;
723 case 3000: arch_flags = M_MIPS1; break;
724 case 4000: /* mips3 */
726 case 8000: /* mips4 */
728 case 6000: arch_flags = M_MIPS2; break;
729 default: arch_flags = M_UNKNOWN; break;
735 case 0: arch_flags = M_NS32532; break;
736 case 32032: arch_flags = M_NS32032; break;
737 case 32532: arch_flags = M_NS32532; break;
738 default: arch_flags = M_UNKNOWN; break;
746 /* start-sanitize-rce */
750 /* end-sanitize-rce */
753 arch_flags = M_UNKNOWN;
756 if (arch_flags != M_UNKNOWN)
765 aout_@var{size}_set_arch_mach
768 boolean aout_@var{size}_set_arch_mach,
770 enum bfd_architecture arch,
771 unsigned long machine));
774 Set the architecture and the machine of the BFD @var{abfd} to the
775 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
776 can support the architecture required.
780 NAME(aout,set_arch_mach) (abfd, arch, machine)
782 enum bfd_architecture arch;
783 unsigned long machine;
785 if (! bfd_default_set_arch_mach (abfd, arch, machine))
788 if (arch != bfd_arch_unknown)
792 NAME(aout,machine_type) (arch, machine, &unknown);
797 /* Determine the size of a relocation entry */
802 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
805 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
809 return (*aout_backend_info(abfd)->set_sizes) (abfd);
813 adjust_o_magic (abfd, execp)
815 struct internal_exec *execp;
817 file_ptr pos = adata (abfd).exec_bytes_size;
822 obj_textsec(abfd)->filepos = pos;
823 if (!obj_textsec(abfd)->user_set_vma)
824 obj_textsec(abfd)->vma = vma;
826 vma = obj_textsec(abfd)->vma;
828 pos += obj_textsec(abfd)->_raw_size;
829 vma += obj_textsec(abfd)->_raw_size;
832 if (!obj_datasec(abfd)->user_set_vma)
834 #if 0 /* ?? Does alignment in the file image really matter? */
835 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
837 obj_textsec(abfd)->_raw_size += pad;
840 obj_datasec(abfd)->vma = vma;
843 vma = obj_datasec(abfd)->vma;
844 obj_datasec(abfd)->filepos = pos;
845 pos += obj_datasec(abfd)->_raw_size;
846 vma += obj_datasec(abfd)->_raw_size;
849 if (!obj_bsssec(abfd)->user_set_vma)
852 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
854 obj_datasec(abfd)->_raw_size += pad;
857 obj_bsssec(abfd)->vma = vma;
861 /* The VMA of the .bss section is set by the the VMA of the
862 .data section plus the size of the .data section. We may
863 need to add padding bytes to make this true. */
864 pad = obj_bsssec (abfd)->vma - vma;
867 obj_datasec (abfd)->_raw_size += pad;
871 obj_bsssec(abfd)->filepos = pos;
873 /* Fix up the exec header. */
874 execp->a_text = obj_textsec(abfd)->_raw_size;
875 execp->a_data = obj_datasec(abfd)->_raw_size;
876 execp->a_bss = obj_bsssec(abfd)->_raw_size;
877 N_SET_MAGIC (*execp, OMAGIC);
881 adjust_z_magic (abfd, execp)
883 struct internal_exec *execp;
885 bfd_size_type data_pad, text_pad;
887 CONST struct aout_backend_data *abdp;
888 int ztih; /* Nonzero if text includes exec header. */
890 abdp = aout_backend_info (abfd);
894 && (abdp->text_includes_header
895 || obj_aout_subformat (abfd) == q_magic_format));
896 obj_textsec(abfd)->filepos = (ztih
897 ? adata(abfd).exec_bytes_size
898 : adata(abfd).zmagic_disk_block_size);
899 if (! obj_textsec(abfd)->user_set_vma)
901 /* ?? Do we really need to check for relocs here? */
902 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
905 ? (abdp->default_text_vma
906 + adata(abfd).exec_bytes_size)
907 : abdp->default_text_vma));
912 /* The .text section is being loaded at an unusual address. We
913 may need to pad it such that the .data section starts at a page
916 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
917 & (adata (abfd).page_size - 1));
919 text_pad = ((- obj_textsec (abfd)->vma)
920 & (adata (abfd).page_size - 1));
923 /* Find start of data. */
926 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
927 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
931 /* Note that if page_size == zmagic_disk_block_size, then
932 filepos == page_size, and this case is the same as the ztih
934 text_end = obj_textsec (abfd)->_raw_size;
935 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
936 text_end += obj_textsec (abfd)->filepos;
938 obj_textsec(abfd)->_raw_size += text_pad;
939 text_end += text_pad;
942 if (!obj_datasec(abfd)->user_set_vma)
945 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
946 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
948 if (abdp && abdp->zmagic_mapped_contiguous)
950 text_pad = (obj_datasec(abfd)->vma
951 - obj_textsec(abfd)->vma
952 - obj_textsec(abfd)->_raw_size);
953 obj_textsec(abfd)->_raw_size += text_pad;
955 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
956 + obj_textsec(abfd)->_raw_size);
958 /* Fix up exec header while we're at it. */
959 execp->a_text = obj_textsec(abfd)->_raw_size;
960 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
961 execp->a_text += adata(abfd).exec_bytes_size;
962 if (obj_aout_subformat (abfd) == q_magic_format)
963 N_SET_MAGIC (*execp, QMAGIC);
965 N_SET_MAGIC (*execp, ZMAGIC);
967 /* Spec says data section should be rounded up to page boundary. */
968 obj_datasec(abfd)->_raw_size
969 = align_power (obj_datasec(abfd)->_raw_size,
970 obj_bsssec(abfd)->alignment_power);
971 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
972 adata(abfd).page_size);
973 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
976 if (!obj_bsssec(abfd)->user_set_vma)
977 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
978 + obj_datasec(abfd)->_raw_size);
979 /* If the BSS immediately follows the data section and extra space
980 in the page is left after the data section, fudge data
981 in the header so that the bss section looks smaller by that
982 amount. We'll start the bss section there, and lie to the OS.
983 (Note that a linker script, as well as the above assignment,
984 could have explicitly set the BSS vma to immediately follow
985 the data section.) */
986 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
987 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
988 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
989 obj_bsssec(abfd)->_raw_size - data_pad;
991 execp->a_bss = obj_bsssec(abfd)->_raw_size;
995 adjust_n_magic (abfd, execp)
997 struct internal_exec *execp;
999 file_ptr pos = adata(abfd).exec_bytes_size;
1004 obj_textsec(abfd)->filepos = pos;
1005 if (!obj_textsec(abfd)->user_set_vma)
1006 obj_textsec(abfd)->vma = vma;
1008 vma = obj_textsec(abfd)->vma;
1009 pos += obj_textsec(abfd)->_raw_size;
1010 vma += obj_textsec(abfd)->_raw_size;
1013 obj_datasec(abfd)->filepos = pos;
1014 if (!obj_datasec(abfd)->user_set_vma)
1015 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1016 vma = obj_datasec(abfd)->vma;
1018 /* Since BSS follows data immediately, see if it needs alignment. */
1019 vma += obj_datasec(abfd)->_raw_size;
1020 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1021 obj_datasec(abfd)->_raw_size += pad;
1022 pos += obj_datasec(abfd)->_raw_size;
1025 if (!obj_bsssec(abfd)->user_set_vma)
1026 obj_bsssec(abfd)->vma = vma;
1028 vma = obj_bsssec(abfd)->vma;
1030 /* Fix up exec header. */
1031 execp->a_text = obj_textsec(abfd)->_raw_size;
1032 execp->a_data = obj_datasec(abfd)->_raw_size;
1033 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1034 N_SET_MAGIC (*execp, NMAGIC);
1038 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1040 bfd_size_type *text_size;
1043 struct internal_exec *execp = exec_hdr (abfd);
1045 if (! NAME(aout,make_sections) (abfd))
1048 if (adata(abfd).magic != undecided_magic)
1051 obj_textsec(abfd)->_raw_size =
1052 align_power(obj_textsec(abfd)->_raw_size,
1053 obj_textsec(abfd)->alignment_power);
1055 *text_size = obj_textsec (abfd)->_raw_size;
1056 /* Rule (heuristic) for when to pad to a new page. Note that there
1057 are (at least) two ways demand-paged (ZMAGIC) files have been
1058 handled. Most Berkeley-based systems start the text segment at
1059 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1060 segment right after the exec header; the latter is counted in the
1061 text segment size, and is paged in by the kernel with the rest of
1064 /* This perhaps isn't the right way to do this, but made it simpler for me
1065 to understand enough to implement it. Better would probably be to go
1066 right from BFD flags to alignment/positioning characteristics. But the
1067 old code was sloppy enough about handling the flags, and had enough
1068 other magic, that it was a little hard for me to understand. I think
1069 I understand it better now, but I haven't time to do the cleanup this
1072 if (abfd->flags & D_PAGED)
1073 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1074 adata(abfd).magic = z_magic;
1075 else if (abfd->flags & WP_TEXT)
1076 adata(abfd).magic = n_magic;
1078 adata(abfd).magic = o_magic;
1080 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1082 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1084 switch (adata(abfd).magic) {
1085 case n_magic: str = "NMAGIC"; break;
1086 case o_magic: str = "OMAGIC"; break;
1087 case z_magic: str = "ZMAGIC"; break;
1092 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1093 obj_textsec(abfd)->alignment_power,
1094 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1095 obj_datasec(abfd)->alignment_power,
1096 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1097 obj_bsssec(abfd)->alignment_power);
1101 switch (adata(abfd).magic)
1104 adjust_o_magic (abfd, execp);
1107 adjust_z_magic (abfd, execp);
1110 adjust_n_magic (abfd, execp);
1116 #ifdef BFD_AOUT_DEBUG
1117 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1118 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1119 obj_textsec(abfd)->filepos,
1120 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1121 obj_datasec(abfd)->filepos,
1122 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1130 aout_@var{size}_new_section_hook
1133 boolean aout_@var{size}_new_section_hook,
1135 asection *newsect));
1138 Called by the BFD in response to a @code{bfd_make_section}
1142 NAME(aout,new_section_hook) (abfd, newsect)
1146 /* align to double at least */
1147 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1150 if (bfd_get_format (abfd) == bfd_object)
1152 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1153 obj_textsec(abfd)= newsect;
1154 newsect->target_index = N_TEXT;
1158 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1159 obj_datasec(abfd) = newsect;
1160 newsect->target_index = N_DATA;
1164 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1165 obj_bsssec(abfd) = newsect;
1166 newsect->target_index = N_BSS;
1172 /* We allow more than three sections internally */
1177 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1182 bfd_size_type count;
1185 bfd_size_type text_size;
1187 if (! abfd->output_has_begun)
1189 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1193 if (section == obj_bsssec (abfd))
1195 bfd_set_error (bfd_error_no_contents);
1199 if (section != obj_textsec (abfd)
1200 && section != obj_datasec (abfd))
1202 (*_bfd_error_handler)
1203 ("%s: can not represent section `%s' in a.out object file format",
1204 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1205 bfd_set_error (bfd_error_nonrepresentable_section);
1211 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1212 || bfd_write (location, 1, count, abfd) != count)
1219 /* Read the external symbols from an a.out file. */
1222 aout_get_external_symbols (abfd)
1225 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1227 bfd_size_type count;
1228 struct external_nlist *syms;
1230 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1233 if (bfd_get_file_window (abfd,
1234 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1235 &obj_aout_sym_window (abfd), true) == false)
1237 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1239 /* We allocate using malloc to make the values easy to free
1240 later on. If we put them on the obstack it might not be
1241 possible to free them. */
1242 syms = ((struct external_nlist *)
1243 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1244 if (syms == (struct external_nlist *) NULL && count != 0)
1247 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1248 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1249 != exec_hdr (abfd)->a_syms))
1256 obj_aout_external_syms (abfd) = syms;
1257 obj_aout_external_sym_count (abfd) = count;
1260 if (obj_aout_external_strings (abfd) == NULL
1261 && exec_hdr (abfd)->a_syms != 0)
1263 unsigned char string_chars[BYTES_IN_WORD];
1264 bfd_size_type stringsize;
1267 /* Get the size of the strings. */
1268 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1269 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1272 stringsize = GET_WORD (abfd, string_chars);
1275 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1276 &obj_aout_string_window (abfd), true) == false)
1278 strings = (char *) obj_aout_string_window (abfd).data;
1280 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1281 if (strings == NULL)
1284 /* Skip space for the string count in the buffer for convenience
1285 when using indexes. */
1286 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1288 != stringsize - BYTES_IN_WORD)
1295 /* Ensure that a zero index yields an empty string. */
1298 strings[stringsize - 1] = 0;
1300 obj_aout_external_strings (abfd) = strings;
1301 obj_aout_external_string_size (abfd) = stringsize;
1307 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1308 and symbol->value fields of CACHE_PTR will be set from the a.out
1309 nlist structure. This function is responsible for setting
1310 symbol->flags and symbol->section, and adjusting symbol->value. */
1313 translate_from_native_sym_flags (abfd, cache_ptr)
1315 aout_symbol_type *cache_ptr;
1319 if ((cache_ptr->type & N_STAB) != 0
1320 || cache_ptr->type == N_FN)
1324 /* This is a debugging symbol. */
1326 cache_ptr->symbol.flags = BSF_DEBUGGING;
1328 /* Work out the symbol section. */
1329 switch (cache_ptr->type & N_TYPE)
1333 sec = obj_textsec (abfd);
1336 sec = obj_datasec (abfd);
1339 sec = obj_bsssec (abfd);
1343 sec = bfd_abs_section_ptr;
1347 cache_ptr->symbol.section = sec;
1348 cache_ptr->symbol.value -= sec->vma;
1353 /* Get the default visibility. This does not apply to all types, so
1354 we just hold it in a local variable to use if wanted. */
1355 if ((cache_ptr->type & N_EXT) == 0)
1356 visible = BSF_LOCAL;
1358 visible = BSF_GLOBAL;
1360 switch (cache_ptr->type)
1363 case N_ABS: case N_ABS | N_EXT:
1364 cache_ptr->symbol.section = bfd_abs_section_ptr;
1365 cache_ptr->symbol.flags = visible;
1368 case N_UNDF | N_EXT:
1369 if (cache_ptr->symbol.value != 0)
1371 /* This is a common symbol. */
1372 cache_ptr->symbol.flags = BSF_GLOBAL;
1373 cache_ptr->symbol.section = bfd_com_section_ptr;
1377 cache_ptr->symbol.flags = 0;
1378 cache_ptr->symbol.section = bfd_und_section_ptr;
1382 case N_TEXT: case N_TEXT | N_EXT:
1383 cache_ptr->symbol.section = obj_textsec (abfd);
1384 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1385 cache_ptr->symbol.flags = visible;
1388 /* N_SETV symbols used to represent set vectors placed in the
1389 data section. They are no longer generated. Theoretically,
1390 it was possible to extract the entries and combine them with
1391 new ones, although I don't know if that was ever actually
1392 done. Unless that feature is restored, treat them as data
1394 case N_SETV: case N_SETV | N_EXT:
1395 case N_DATA: case N_DATA | N_EXT:
1396 cache_ptr->symbol.section = obj_datasec (abfd);
1397 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1398 cache_ptr->symbol.flags = visible;
1401 case N_BSS: case N_BSS | N_EXT:
1402 cache_ptr->symbol.section = obj_bsssec (abfd);
1403 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1404 cache_ptr->symbol.flags = visible;
1407 case N_SETA: case N_SETA | N_EXT:
1408 case N_SETT: case N_SETT | N_EXT:
1409 case N_SETD: case N_SETD | N_EXT:
1410 case N_SETB: case N_SETB | N_EXT:
1413 arelent_chain *reloc;
1414 asection *into_section;
1416 /* This is a set symbol. The name of the symbol is the name
1417 of the set (e.g., __CTOR_LIST__). The value of the symbol
1418 is the value to add to the set. We create a section with
1419 the same name as the symbol, and add a reloc to insert the
1420 appropriate value into the section.
1422 This action is actually obsolete; it used to make the
1423 linker do the right thing, but the linker no longer uses
1426 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1427 if (section == NULL)
1431 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1435 strcpy (copy, cache_ptr->symbol.name);
1436 section = bfd_make_section (abfd, copy);
1437 if (section == NULL)
1441 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1445 /* Build a relocation entry for the constructor. */
1446 switch (cache_ptr->type & N_TYPE)
1449 into_section = bfd_abs_section_ptr;
1450 cache_ptr->type = N_ABS;
1453 into_section = obj_textsec (abfd);
1454 cache_ptr->type = N_TEXT;
1457 into_section = obj_datasec (abfd);
1458 cache_ptr->type = N_DATA;
1461 into_section = obj_bsssec (abfd);
1462 cache_ptr->type = N_BSS;
1466 /* Build a relocation pointing into the constructor section
1467 pointing at the symbol in the set vector specified. */
1468 reloc->relent.addend = cache_ptr->symbol.value;
1469 cache_ptr->symbol.section = into_section;
1470 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1472 /* We modify the symbol to belong to a section depending upon
1473 the name of the symbol, and add to the size of the section
1474 to contain a pointer to the symbol. Build a reloc entry to
1475 relocate to this symbol attached to this section. */
1476 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1478 section->reloc_count++;
1479 section->alignment_power = 2;
1481 reloc->next = section->constructor_chain;
1482 section->constructor_chain = reloc;
1483 reloc->relent.address = section->_raw_size;
1484 section->_raw_size += BYTES_IN_WORD;
1486 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1488 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1493 /* This symbol is the text of a warning message. The next
1494 symbol is the symbol to associate the warning with. If a
1495 reference is made to that symbol, a warning is issued. */
1496 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1497 cache_ptr->symbol.section = bfd_abs_section_ptr;
1500 case N_INDR: case N_INDR | N_EXT:
1501 /* An indirect symbol. This consists of two symbols in a row.
1502 The first symbol is the name of the indirection. The second
1503 symbol is the name of the target. A reference to the first
1504 symbol becomes a reference to the second. */
1505 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1506 cache_ptr->symbol.section = bfd_ind_section_ptr;
1510 cache_ptr->symbol.section = bfd_und_section_ptr;
1511 cache_ptr->symbol.flags = BSF_WEAK;
1515 cache_ptr->symbol.section = bfd_abs_section_ptr;
1516 cache_ptr->symbol.flags = BSF_WEAK;
1520 cache_ptr->symbol.section = obj_textsec (abfd);
1521 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1522 cache_ptr->symbol.flags = BSF_WEAK;
1526 cache_ptr->symbol.section = obj_datasec (abfd);
1527 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1528 cache_ptr->symbol.flags = BSF_WEAK;
1532 cache_ptr->symbol.section = obj_bsssec (abfd);
1533 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1534 cache_ptr->symbol.flags = BSF_WEAK;
1541 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1544 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1547 struct external_nlist *sym_pointer;
1549 bfd_vma value = cache_ptr->value;
1553 /* Mask out any existing type bits in case copying from one section
1555 sym_pointer->e_type[0] &= ~N_TYPE;
1557 sec = bfd_get_section (cache_ptr);
1562 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1564 (*_bfd_error_handler)
1565 ("%s: can not represent section `%s' in a.out object file format",
1566 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1567 bfd_set_error (bfd_error_nonrepresentable_section);
1571 if (sec->output_section != NULL)
1573 off = sec->output_offset;
1574 sec = sec->output_section;
1577 if (bfd_is_abs_section (sec))
1578 sym_pointer->e_type[0] |= N_ABS;
1579 else if (sec == obj_textsec (abfd))
1580 sym_pointer->e_type[0] |= N_TEXT;
1581 else if (sec == obj_datasec (abfd))
1582 sym_pointer->e_type[0] |= N_DATA;
1583 else if (sec == obj_bsssec (abfd))
1584 sym_pointer->e_type[0] |= N_BSS;
1585 else if (bfd_is_und_section (sec))
1586 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1587 else if (bfd_is_ind_section (sec))
1588 sym_pointer->e_type[0] = N_INDR;
1589 else if (bfd_is_com_section (sec))
1590 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1593 (*_bfd_error_handler)
1594 ("%s: can not represent section `%s' in a.out object file format",
1595 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1596 bfd_set_error (bfd_error_nonrepresentable_section);
1600 /* Turn the symbol from section relative to absolute again */
1601 value += sec->vma + off;
1603 if ((cache_ptr->flags & BSF_WARNING) != 0)
1604 sym_pointer->e_type[0] = N_WARNING;
1606 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1607 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1608 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1609 sym_pointer->e_type[0] |= N_EXT;
1611 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1613 int type = ((aout_symbol_type *) cache_ptr)->type;
1616 case N_ABS: type = N_SETA; break;
1617 case N_TEXT: type = N_SETT; break;
1618 case N_DATA: type = N_SETD; break;
1619 case N_BSS: type = N_SETB; break;
1621 sym_pointer->e_type[0] = type;
1624 if ((cache_ptr->flags & BSF_WEAK) != 0)
1628 switch (sym_pointer->e_type[0] & N_TYPE)
1631 case N_ABS: type = N_WEAKA; break;
1632 case N_TEXT: type = N_WEAKT; break;
1633 case N_DATA: type = N_WEAKD; break;
1634 case N_BSS: type = N_WEAKB; break;
1635 case N_UNDF: type = N_WEAKU; break;
1637 sym_pointer->e_type[0] = type;
1640 PUT_WORD(abfd, value, sym_pointer->e_value);
1645 /* Native-level interface to symbols. */
1648 NAME(aout,make_empty_symbol) (abfd)
1651 aout_symbol_type *new =
1652 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1655 new->symbol.the_bfd = abfd;
1657 return &new->symbol;
1660 /* Translate a set of internal symbols into external symbols. */
1663 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1665 aout_symbol_type *in;
1666 struct external_nlist *ext;
1667 bfd_size_type count;
1669 bfd_size_type strsize;
1672 struct external_nlist *ext_end;
1674 ext_end = ext + count;
1675 for (; ext < ext_end; ext++, in++)
1679 x = GET_WORD (abfd, ext->e_strx);
1680 in->symbol.the_bfd = abfd;
1682 /* For the normal symbols, the zero index points at the number
1683 of bytes in the string table but is to be interpreted as the
1684 null string. For the dynamic symbols, the number of bytes in
1685 the string table is stored in the __DYNAMIC structure and the
1686 zero index points at an actual string. */
1687 if (x == 0 && ! dynamic)
1688 in->symbol.name = "";
1689 else if (x < strsize)
1690 in->symbol.name = str + x;
1694 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1695 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1696 in->other = bfd_h_get_8 (abfd, ext->e_other);
1697 in->type = bfd_h_get_8 (abfd, ext->e_type);
1698 in->symbol.udata.p = NULL;
1700 if (! translate_from_native_sym_flags (abfd, in))
1704 in->symbol.flags |= BSF_DYNAMIC;
1710 /* We read the symbols into a buffer, which is discarded when this
1711 function exits. We read the strings into a buffer large enough to
1712 hold them all plus all the cached symbol entries. */
1715 NAME(aout,slurp_symbol_table) (abfd)
1718 struct external_nlist *old_external_syms;
1719 aout_symbol_type *cached;
1722 /* If there's no work to be done, don't do any */
1723 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1726 old_external_syms = obj_aout_external_syms (abfd);
1728 if (! aout_get_external_symbols (abfd))
1731 cached_size = (obj_aout_external_sym_count (abfd)
1732 * sizeof (aout_symbol_type));
1733 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1734 if (cached == NULL && cached_size != 0)
1736 if (cached_size != 0)
1737 memset (cached, 0, cached_size);
1739 /* Convert from external symbol information to internal. */
1740 if (! (NAME(aout,translate_symbol_table)
1742 obj_aout_external_syms (abfd),
1743 obj_aout_external_sym_count (abfd),
1744 obj_aout_external_strings (abfd),
1745 obj_aout_external_string_size (abfd),
1752 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1754 obj_aout_symbols (abfd) = cached;
1756 /* It is very likely that anybody who calls this function will not
1757 want the external symbol information, so if it was allocated
1758 because of our call to aout_get_external_symbols, we free it up
1759 right away to save space. */
1760 if (old_external_syms == (struct external_nlist *) NULL
1761 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1764 bfd_free_window (&obj_aout_sym_window (abfd));
1766 free (obj_aout_external_syms (abfd));
1768 obj_aout_external_syms (abfd) = NULL;
1774 /* We use a hash table when writing out symbols so that we only write
1775 out a particular string once. This helps particularly when the
1776 linker writes out stabs debugging entries, because each different
1777 contributing object file tends to have many duplicate stabs
1780 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1781 if BFD_TRADITIONAL_FORMAT is set. */
1783 static bfd_size_type add_to_stringtab
1784 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1785 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1787 /* Get the index of a string in a strtab, adding it if it is not
1790 static INLINE bfd_size_type
1791 add_to_stringtab (abfd, tab, str, copy)
1793 struct bfd_strtab_hash *tab;
1798 bfd_size_type index;
1800 /* An index of 0 always means the empty string. */
1801 if (str == 0 || *str == '\0')
1804 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1805 doesn't understand a hashed string table. */
1807 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1810 index = _bfd_stringtab_add (tab, str, hash, copy);
1812 if (index != (bfd_size_type) -1)
1814 /* Add BYTES_IN_WORD to the return value to account for the
1815 space taken up by the string table size. */
1816 index += BYTES_IN_WORD;
1822 /* Write out a strtab. ABFD is already at the right location in the
1826 emit_stringtab (abfd, tab)
1828 struct bfd_strtab_hash *tab;
1830 bfd_byte buffer[BYTES_IN_WORD];
1832 /* The string table starts with the size. */
1833 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1834 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1837 return _bfd_stringtab_emit (abfd, tab);
1841 NAME(aout,write_syms) (abfd)
1844 unsigned int count ;
1845 asymbol **generic = bfd_get_outsymbols (abfd);
1846 struct bfd_strtab_hash *strtab;
1848 strtab = _bfd_stringtab_init ();
1852 for (count = 0; count < bfd_get_symcount (abfd); count++)
1854 asymbol *g = generic[count];
1856 struct external_nlist nsp;
1858 indx = add_to_stringtab (abfd, strtab, g->name, false);
1859 if (indx == (bfd_size_type) -1)
1861 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1863 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1865 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1866 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1867 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1871 bfd_h_put_16(abfd,0, nsp.e_desc);
1872 bfd_h_put_8(abfd, 0, nsp.e_other);
1873 bfd_h_put_8(abfd, 0, nsp.e_type);
1876 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1879 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1880 != EXTERNAL_NLIST_SIZE)
1883 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1884 here, at the end. */
1888 if (! emit_stringtab (abfd, strtab))
1891 _bfd_stringtab_free (strtab);
1896 _bfd_stringtab_free (strtab);
1902 NAME(aout,get_symtab) (abfd, location)
1906 unsigned int counter = 0;
1907 aout_symbol_type *symbase;
1909 if (!NAME(aout,slurp_symbol_table)(abfd))
1912 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1913 *(location++) = (asymbol *)( symbase++);
1915 return bfd_get_symcount (abfd);
1919 /* Standard reloc stuff */
1920 /* Output standard relocation information to a file in target byte order. */
1923 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
1926 struct reloc_std_external *natptr;
1929 asymbol *sym = *(g->sym_ptr_ptr);
1931 unsigned int r_length;
1933 int r_baserel, r_jmptable, r_relative;
1934 asection *output_section = sym->section->output_section;
1936 PUT_WORD(abfd, g->address, natptr->r_address);
1938 r_length = g->howto->size ; /* Size as a power of two */
1939 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1940 /* XXX This relies on relocs coming from a.out files. */
1941 r_baserel = (g->howto->type & 8) != 0;
1942 r_jmptable = (g->howto->type & 16) != 0;
1943 r_relative = (g->howto->type & 32) != 0;
1946 /* For a standard reloc, the addend is in the object file. */
1947 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
1950 /* name was clobbered by aout_write_syms to be symbol index */
1952 /* If this relocation is relative to a symbol then set the
1953 r_index to the symbols index, and the r_extern bit.
1955 Absolute symbols can come in in two ways, either as an offset
1956 from the abs section, or as a symbol which has an abs value.
1961 if (bfd_is_com_section (output_section)
1962 || bfd_is_abs_section (output_section)
1963 || bfd_is_und_section (output_section))
1965 if (bfd_abs_section_ptr->symbol == sym)
1967 /* Whoops, looked like an abs symbol, but is really an offset
1968 from the abs section */
1974 /* Fill in symbol */
1976 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1982 /* Just an ordinary section */
1984 r_index = output_section->target_index;
1987 /* now the fun stuff */
1988 if (abfd->xvec->header_byteorder_big_p != false) {
1989 natptr->r_index[0] = r_index >> 16;
1990 natptr->r_index[1] = r_index >> 8;
1991 natptr->r_index[2] = r_index;
1993 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
1994 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
1995 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
1996 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
1997 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
1998 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2000 natptr->r_index[2] = r_index >> 16;
2001 natptr->r_index[1] = r_index >> 8;
2002 natptr->r_index[0] = r_index;
2004 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2005 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2006 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2007 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2008 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2009 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2014 /* Extended stuff */
2015 /* Output extended relocation information to a file in target byte order. */
2018 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2021 register struct reloc_ext_external *natptr;
2025 unsigned int r_type;
2026 unsigned int r_addend;
2027 asymbol *sym = *(g->sym_ptr_ptr);
2028 asection *output_section = sym->section->output_section;
2030 PUT_WORD (abfd, g->address, natptr->r_address);
2032 r_type = (unsigned int) g->howto->type;
2034 r_addend = g->addend;
2035 if ((sym->flags & BSF_SECTION_SYM) != 0)
2036 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2038 /* If this relocation is relative to a symbol then set the
2039 r_index to the symbols index, and the r_extern bit.
2041 Absolute symbols can come in in two ways, either as an offset
2042 from the abs section, or as a symbol which has an abs value.
2043 check for that here. */
2045 if (bfd_is_abs_section (bfd_get_section (sym)))
2050 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2052 if (bfd_is_und_section (bfd_get_section (sym))
2053 || (sym->flags & BSF_GLOBAL) != 0)
2057 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2061 /* Just an ordinary section */
2063 r_index = output_section->target_index;
2066 /* now the fun stuff */
2067 if (abfd->xvec->header_byteorder_big_p != false) {
2068 natptr->r_index[0] = r_index >> 16;
2069 natptr->r_index[1] = r_index >> 8;
2070 natptr->r_index[2] = r_index;
2072 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2073 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2075 natptr->r_index[2] = r_index >> 16;
2076 natptr->r_index[1] = r_index >> 8;
2077 natptr->r_index[0] = r_index;
2079 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2080 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2083 PUT_WORD (abfd, r_addend, natptr->r_addend);
2086 /* BFD deals internally with all things based from the section they're
2087 in. so, something in 10 bytes into a text section with a base of
2088 50 would have a symbol (.text+10) and know .text vma was 50.
2090 Aout keeps all it's symbols based from zero, so the symbol would
2091 contain 60. This macro subs the base of each section from the value
2092 to give the true offset from the section */
2095 #define MOVE_ADDRESS(ad) \
2097 /* undefined symbol */ \
2098 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2099 cache_ptr->addend = ad; \
2101 /* defined, section relative. replace symbol with pointer to \
2102 symbol which points to section */ \
2103 switch (r_index) { \
2105 case N_TEXT | N_EXT: \
2106 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2107 cache_ptr->addend = ad - su->textsec->vma; \
2110 case N_DATA | N_EXT: \
2111 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2112 cache_ptr->addend = ad - su->datasec->vma; \
2115 case N_BSS | N_EXT: \
2116 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2117 cache_ptr->addend = ad - su->bsssec->vma; \
2121 case N_ABS | N_EXT: \
2122 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2123 cache_ptr->addend = ad; \
2129 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2131 struct reloc_ext_external *bytes;
2134 bfd_size_type symcount;
2136 unsigned int r_index;
2138 unsigned int r_type;
2139 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2141 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2143 /* now the fun stuff */
2144 if (abfd->xvec->header_byteorder_big_p != false) {
2145 r_index = (bytes->r_index[0] << 16)
2146 | (bytes->r_index[1] << 8)
2147 | bytes->r_index[2];
2148 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2149 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2150 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2152 r_index = (bytes->r_index[2] << 16)
2153 | (bytes->r_index[1] << 8)
2154 | bytes->r_index[0];
2155 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2156 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2157 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2160 cache_ptr->howto = howto_table_ext + r_type;
2162 /* Base relative relocs are always against the symbol table,
2163 regardless of the setting of r_extern. r_extern just reflects
2164 whether the symbol the reloc is against is local or global. */
2165 if (r_type == RELOC_BASE10
2166 || r_type == RELOC_BASE13
2167 || r_type == RELOC_BASE22)
2170 if (r_extern && r_index > symcount)
2172 /* We could arrange to return an error, but it might be useful
2173 to see the file even if it is bad. */
2178 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2182 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2184 struct reloc_std_external *bytes;
2187 bfd_size_type symcount;
2189 unsigned int r_index;
2191 unsigned int r_length;
2193 int r_baserel, r_jmptable, r_relative;
2194 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2195 unsigned int howto_idx;
2197 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2199 /* now the fun stuff */
2200 if (abfd->xvec->header_byteorder_big_p != false) {
2201 r_index = (bytes->r_index[0] << 16)
2202 | (bytes->r_index[1] << 8)
2203 | bytes->r_index[2];
2204 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2205 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2206 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2207 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2208 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2209 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2210 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2212 r_index = (bytes->r_index[2] << 16)
2213 | (bytes->r_index[1] << 8)
2214 | bytes->r_index[0];
2215 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2216 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2217 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2218 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2219 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2220 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2221 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2224 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2225 + 16 * r_jmptable + 32 * r_relative;
2226 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2227 cache_ptr->howto = howto_table_std + howto_idx;
2228 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2230 /* Base relative relocs are always against the symbol table,
2231 regardless of the setting of r_extern. r_extern just reflects
2232 whether the symbol the reloc is against is local or global. */
2236 if (r_extern && r_index > symcount)
2238 /* We could arrange to return an error, but it might be useful
2239 to see the file even if it is bad. */
2247 /* Read and swap the relocs for a section. */
2250 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2256 bfd_size_type reloc_size;
2258 arelent *reloc_cache;
2260 unsigned int counter = 0;
2263 if (asect->relocation)
2266 if (asect->flags & SEC_CONSTRUCTOR)
2269 if (asect == obj_datasec (abfd))
2270 reloc_size = exec_hdr(abfd)->a_drsize;
2271 else if (asect == obj_textsec (abfd))
2272 reloc_size = exec_hdr(abfd)->a_trsize;
2273 else if (asect == obj_bsssec (abfd))
2277 bfd_set_error (bfd_error_invalid_operation);
2281 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2284 each_size = obj_reloc_entry_size (abfd);
2286 count = reloc_size / each_size;
2288 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2289 if (reloc_cache == NULL && count != 0)
2291 memset (reloc_cache, 0, count * sizeof (arelent));
2293 relocs = bfd_malloc ((size_t) reloc_size);
2294 if (relocs == NULL && reloc_size != 0)
2300 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2307 cache_ptr = reloc_cache;
2308 if (each_size == RELOC_EXT_SIZE)
2310 register struct reloc_ext_external *rptr =
2311 (struct reloc_ext_external *) relocs;
2313 for (; counter < count; counter++, rptr++, cache_ptr++)
2314 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols,
2315 bfd_get_symcount (abfd));
2319 register struct reloc_std_external *rptr =
2320 (struct reloc_std_external *) relocs;
2322 for (; counter < count; counter++, rptr++, cache_ptr++)
2323 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2324 bfd_get_symcount (abfd));
2329 asect->relocation = reloc_cache;
2330 asect->reloc_count = cache_ptr - reloc_cache;
2335 /* Write out a relocation section into an object file. */
2338 NAME(aout,squirt_out_relocs) (abfd, section)
2343 unsigned char *native, *natptr;
2346 unsigned int count = section->reloc_count;
2349 if (count == 0) return true;
2351 each_size = obj_reloc_entry_size (abfd);
2352 natsize = each_size * count;
2353 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2357 generic = section->orelocation;
2359 if (each_size == RELOC_EXT_SIZE)
2361 for (natptr = native;
2363 --count, natptr += each_size, ++generic)
2364 NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
2368 for (natptr = native;
2370 --count, natptr += each_size, ++generic)
2371 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2374 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2375 bfd_release(abfd, native);
2378 bfd_release (abfd, native);
2383 /* This is stupid. This function should be a boolean predicate */
2385 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2391 arelent *tblptr = section->relocation;
2394 if (section == obj_bsssec (abfd))
2400 if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
2403 if (section->flags & SEC_CONSTRUCTOR) {
2404 arelent_chain *chain = section->constructor_chain;
2405 for (count = 0; count < section->reloc_count; count ++) {
2406 *relptr ++ = &chain->relent;
2407 chain = chain->next;
2411 tblptr = section->relocation;
2413 for (count = 0; count++ < section->reloc_count;)
2415 *relptr++ = tblptr++;
2420 return section->reloc_count;
2424 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2428 if (bfd_get_format (abfd) != bfd_object) {
2429 bfd_set_error (bfd_error_invalid_operation);
2432 if (asect->flags & SEC_CONSTRUCTOR) {
2433 return (sizeof (arelent *) * (asect->reloc_count+1));
2436 if (asect == obj_datasec (abfd))
2437 return (sizeof (arelent *)
2438 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2441 if (asect == obj_textsec (abfd))
2442 return (sizeof (arelent *)
2443 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2446 if (asect == obj_bsssec (abfd))
2447 return sizeof (arelent *);
2449 if (asect == obj_bsssec (abfd))
2452 bfd_set_error (bfd_error_invalid_operation);
2458 NAME(aout,get_symtab_upper_bound) (abfd)
2461 if (!NAME(aout,slurp_symbol_table)(abfd))
2464 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2469 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2471 asymbol *ignore_symbol;
2473 return (alent *)NULL;
2478 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2483 bfd_symbol_info (symbol, ret);
2485 if (ret->type == '?')
2487 int type_code = aout_symbol(symbol)->type & 0xff;
2488 CONST char *stab_name = aout_stab_name(type_code);
2489 static char buf[10];
2491 if (stab_name == NULL)
2493 sprintf(buf, "(%d)", type_code);
2497 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2498 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2499 ret->stab_name = stab_name;
2505 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2509 bfd_print_symbol_type how;
2511 FILE *file = (FILE *)afile;
2514 case bfd_print_symbol_name:
2516 fprintf(file,"%s", symbol->name);
2518 case bfd_print_symbol_more:
2519 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2520 (unsigned)(aout_symbol(symbol)->other & 0xff),
2521 (unsigned)(aout_symbol(symbol)->type));
2523 case bfd_print_symbol_all:
2525 CONST char *section_name = symbol->section->name;
2528 bfd_print_symbol_vandf((PTR)file,symbol);
2530 fprintf(file," %-5s %04x %02x %02x",
2532 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2533 (unsigned)(aout_symbol(symbol)->other & 0xff),
2534 (unsigned)(aout_symbol(symbol)->type & 0xff));
2536 fprintf(file," %s", symbol->name);
2542 /* If we don't have to allocate more than 1MB to hold the generic
2543 symbols, we use the generic minisymbol methord: it's faster, since
2544 it only translates the symbols once, not multiple times. */
2545 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2547 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2548 symbols. The minisymbol_to_symbol function translates these into
2549 BFD asymbol structures. */
2552 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2556 unsigned int *sizep;
2560 /* We could handle the dynamic symbols here as well, but it's
2561 easier to hand them off. */
2562 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2565 if (! aout_get_external_symbols (abfd))
2568 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2569 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2571 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2573 /* By passing the external symbols back from this routine, we are
2574 giving up control over the memory block. Clear
2575 obj_aout_external_syms, so that we do not try to free it
2577 obj_aout_external_syms (abfd) = NULL;
2579 *sizep = EXTERNAL_NLIST_SIZE;
2580 return obj_aout_external_sym_count (abfd);
2583 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2584 unmodified a.out symbol. The SYM argument is a structure returned
2585 by bfd_make_empty_symbol, which we fill in here. */
2588 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2595 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2596 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2598 memset (sym, 0, sizeof (aout_symbol_type));
2600 /* We call translate_symbol_table to translate a single symbol. */
2601 if (! (NAME(aout,translate_symbol_table)
2603 (aout_symbol_type *) sym,
2604 (struct external_nlist *) minisym,
2606 obj_aout_external_strings (abfd),
2607 obj_aout_external_string_size (abfd),
2615 provided a BFD, a section and an offset into the section, calculate
2616 and return the name of the source file and the line nearest to the
2621 NAME(aout,find_nearest_line)
2622 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2627 CONST char **filename_ptr;
2628 CONST char **functionname_ptr;
2629 unsigned int *line_ptr;
2631 /* Run down the file looking for the filename, function and linenumber */
2633 CONST char *directory_name = NULL;
2634 CONST char *main_file_name = NULL;
2635 CONST char *current_file_name = NULL;
2636 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2637 bfd_vma low_line_vma = 0;
2638 bfd_vma low_func_vma = 0;
2640 size_t filelen, funclen;
2643 *filename_ptr = abfd->filename;
2644 *functionname_ptr = 0;
2646 if (symbols != (asymbol **)NULL) {
2647 for (p = symbols; *p; p++) {
2648 aout_symbol_type *q = (aout_symbol_type *)(*p);
2652 main_file_name = current_file_name = q->symbol.name;
2653 /* Look ahead to next symbol to check if that too is an N_SO. */
2657 q = (aout_symbol_type *)(*p);
2658 if (q->type != (int)N_SO)
2661 /* Found a second N_SO First is directory; second is filename. */
2662 directory_name = current_file_name;
2663 main_file_name = current_file_name = q->symbol.name;
2664 if (obj_textsec(abfd) != section)
2668 current_file_name = q->symbol.name;
2675 /* We'll keep this if it resolves nearer than the one we have
2677 if (q->symbol.value >= low_line_vma
2678 && q->symbol.value <= offset)
2680 *line_ptr = q->desc;
2681 low_line_vma = q->symbol.value;
2682 line_file_name = current_file_name;
2687 /* We'll keep this if it is nearer than the one we have already */
2688 if (q->symbol.value >= low_func_vma &&
2689 q->symbol.value <= offset) {
2690 low_func_vma = q->symbol.value;
2691 func = (asymbol *)q;
2693 else if (q->symbol.value > offset)
2703 main_file_name = line_file_name;
2705 if (main_file_name == NULL
2706 || main_file_name[0] == '/'
2707 || directory_name == NULL)
2710 filelen = strlen (directory_name) + strlen (main_file_name);
2714 funclen = strlen (bfd_asymbol_name (func));
2716 if (adata (abfd).line_buf != NULL)
2717 free (adata (abfd).line_buf);
2718 if (filelen + funclen == 0)
2719 adata (abfd).line_buf = buf = NULL;
2722 buf = (char *) bfd_malloc (filelen + funclen + 2);
2723 adata (abfd).line_buf = buf;
2728 if (main_file_name != NULL)
2730 if (main_file_name[0] == '/' || directory_name == NULL)
2731 *filename_ptr = main_file_name;
2734 sprintf (buf, "%s%s", directory_name, main_file_name);
2735 *filename_ptr = buf;
2742 const char *function = func->name;
2745 /* The caller expects a symbol name. We actually have a
2746 function name, without the leading underscore. Put the
2747 underscore back in, so that the caller gets a symbol name. */
2748 if (bfd_get_symbol_leading_char (abfd) == '\0')
2749 strcpy (buf, function);
2752 buf[0] = bfd_get_symbol_leading_char (abfd);
2753 strcpy (buf + 1, function);
2755 /* Have to remove : stuff */
2756 p = strchr (buf, ':');
2759 *functionname_ptr = buf;
2767 NAME(aout,sizeof_headers) (abfd, execable)
2771 return adata(abfd).exec_bytes_size;
2774 /* Free all information we have cached for this BFD. We can always
2775 read it again later if we need it. */
2778 NAME(aout,bfd_free_cached_info) (abfd)
2783 if (bfd_get_format (abfd) != bfd_object)
2786 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2787 BFCI_FREE (obj_aout_symbols (abfd));
2789 obj_aout_external_syms (abfd) = 0;
2790 bfd_free_window (&obj_aout_sym_window (abfd));
2791 bfd_free_window (&obj_aout_string_window (abfd));
2792 obj_aout_external_strings (abfd) = 0;
2794 BFCI_FREE (obj_aout_external_syms (abfd));
2795 BFCI_FREE (obj_aout_external_strings (abfd));
2797 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2798 BFCI_FREE (o->relocation);
2804 /* a.out link code. */
2806 static boolean aout_link_add_object_symbols
2807 PARAMS ((bfd *, struct bfd_link_info *));
2808 static boolean aout_link_check_archive_element
2809 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2810 static boolean aout_link_free_symbols PARAMS ((bfd *));
2811 static boolean aout_link_check_ar_symbols
2812 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2813 static boolean aout_link_add_symbols
2814 PARAMS ((bfd *, struct bfd_link_info *));
2816 /* Routine to create an entry in an a.out link hash table. */
2818 struct bfd_hash_entry *
2819 NAME(aout,link_hash_newfunc) (entry, table, string)
2820 struct bfd_hash_entry *entry;
2821 struct bfd_hash_table *table;
2824 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2826 /* Allocate the structure if it has not already been allocated by a
2828 if (ret == (struct aout_link_hash_entry *) NULL)
2829 ret = ((struct aout_link_hash_entry *)
2830 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2831 if (ret == (struct aout_link_hash_entry *) NULL)
2832 return (struct bfd_hash_entry *) ret;
2834 /* Call the allocation method of the superclass. */
2835 ret = ((struct aout_link_hash_entry *)
2836 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2840 /* Set local fields. */
2841 ret->written = false;
2845 return (struct bfd_hash_entry *) ret;
2848 /* Initialize an a.out link hash table. */
2851 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2852 struct aout_link_hash_table *table;
2854 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2855 struct bfd_hash_table *,
2858 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2861 /* Create an a.out link hash table. */
2863 struct bfd_link_hash_table *
2864 NAME(aout,link_hash_table_create) (abfd)
2867 struct aout_link_hash_table *ret;
2869 ret = ((struct aout_link_hash_table *)
2870 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2872 return (struct bfd_link_hash_table *) NULL;
2873 if (! NAME(aout,link_hash_table_init) (ret, abfd,
2874 NAME(aout,link_hash_newfunc)))
2877 return (struct bfd_link_hash_table *) NULL;
2882 /* Given an a.out BFD, add symbols to the global hash table as
2886 NAME(aout,link_add_symbols) (abfd, info)
2888 struct bfd_link_info *info;
2890 switch (bfd_get_format (abfd))
2893 return aout_link_add_object_symbols (abfd, info);
2895 return _bfd_generic_link_add_archive_symbols
2896 (abfd, info, aout_link_check_archive_element);
2898 bfd_set_error (bfd_error_wrong_format);
2903 /* Add symbols from an a.out object file. */
2906 aout_link_add_object_symbols (abfd, info)
2908 struct bfd_link_info *info;
2910 if (! aout_get_external_symbols (abfd))
2912 if (! aout_link_add_symbols (abfd, info))
2914 if (! info->keep_memory)
2916 if (! aout_link_free_symbols (abfd))
2922 /* Check a single archive element to see if we need to include it in
2923 the link. *PNEEDED is set according to whether this element is
2924 needed in the link or not. This is called from
2925 _bfd_generic_link_add_archive_symbols. */
2928 aout_link_check_archive_element (abfd, info, pneeded)
2930 struct bfd_link_info *info;
2933 if (! aout_get_external_symbols (abfd))
2936 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
2941 if (! aout_link_add_symbols (abfd, info))
2945 if (! info->keep_memory || ! *pneeded)
2947 if (! aout_link_free_symbols (abfd))
2954 /* Free up the internal symbols read from an a.out file. */
2957 aout_link_free_symbols (abfd)
2960 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
2963 bfd_free_window (&obj_aout_sym_window (abfd));
2965 free ((PTR) obj_aout_external_syms (abfd));
2967 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2969 if (obj_aout_external_strings (abfd) != (char *) NULL)
2972 bfd_free_window (&obj_aout_string_window (abfd));
2974 free ((PTR) obj_aout_external_strings (abfd));
2976 obj_aout_external_strings (abfd) = (char *) NULL;
2981 /* Look through the internal symbols to see if this object file should
2982 be included in the link. We should include this object file if it
2983 defines any symbols which are currently undefined. If this object
2984 file defines a common symbol, then we may adjust the size of the
2985 known symbol but we do not include the object file in the link
2986 (unless there is some other reason to include it). */
2989 aout_link_check_ar_symbols (abfd, info, pneeded)
2991 struct bfd_link_info *info;
2994 register struct external_nlist *p;
2995 struct external_nlist *pend;
3000 /* Look through all the symbols. */
3001 p = obj_aout_external_syms (abfd);
3002 pend = p + obj_aout_external_sym_count (abfd);
3003 strings = obj_aout_external_strings (abfd);
3004 for (; p < pend; p++)
3006 int type = bfd_h_get_8 (abfd, p->e_type);
3008 struct bfd_link_hash_entry *h;
3010 /* Ignore symbols that are not externally visible. This is an
3011 optimization only, as we check the type more thoroughly
3013 if (((type & N_EXT) == 0
3014 || (type & N_STAB) != 0
3021 if (type == N_WARNING
3027 name = strings + GET_WORD (abfd, p->e_strx);
3028 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3030 /* We are only interested in symbols that are currently
3031 undefined or common. */
3032 if (h == (struct bfd_link_hash_entry *) NULL
3033 || (h->type != bfd_link_hash_undefined
3034 && h->type != bfd_link_hash_common))
3036 if (type == (N_INDR | N_EXT))
3041 if (type == (N_TEXT | N_EXT)
3042 || type == (N_DATA | N_EXT)
3043 || type == (N_BSS | N_EXT)
3044 || type == (N_ABS | N_EXT)
3045 || type == (N_INDR | N_EXT))
3047 /* This object file defines this symbol. We must link it
3048 in. This is true regardless of whether the current
3049 definition of the symbol is undefined or common. If the
3050 current definition is common, we have a case in which we
3051 have already seen an object file including
3053 and this object file from the archive includes
3055 In such a case we must include this object file.
3057 FIXME: The SunOS 4.1.3 linker will pull in the archive
3058 element if the symbol is defined in the .data section,
3059 but not if it is defined in the .text section. That
3060 seems a bit crazy to me, and I haven't implemented it.
3061 However, it might be correct. */
3062 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3068 if (type == (N_UNDF | N_EXT))
3072 value = GET_WORD (abfd, p->e_value);
3075 /* This symbol is common in the object from the archive
3077 if (h->type == bfd_link_hash_undefined)
3082 symbfd = h->u.undef.abfd;
3083 if (symbfd == (bfd *) NULL)
3085 /* This symbol was created as undefined from
3086 outside BFD. We assume that we should link
3087 in the object file. This is done for the -u
3088 option in the linker. */
3089 if (! (*info->callbacks->add_archive_element) (info,
3096 /* Turn the current link symbol into a common
3097 symbol. It is already on the undefs list. */
3098 h->type = bfd_link_hash_common;
3099 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3100 bfd_hash_allocate (&info->hash->table,
3101 sizeof (struct bfd_link_hash_common_entry)));
3102 if (h->u.c.p == NULL)
3105 h->u.c.size = value;
3107 /* FIXME: This isn't quite right. The maximum
3108 alignment of a common symbol should be set by the
3109 architecture of the output file, not of the input
3111 power = bfd_log2 (value);
3112 if (power > bfd_get_arch_info (abfd)->section_align_power)
3113 power = bfd_get_arch_info (abfd)->section_align_power;
3114 h->u.c.p->alignment_power = power;
3116 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3121 /* Adjust the size of the common symbol if
3123 if (value > h->u.c.size)
3124 h->u.c.size = value;
3134 /* This symbol is weak but defined. We must pull it in if
3135 the current link symbol is undefined, but we don't want
3136 it if the current link symbol is common. */
3137 if (h->type == bfd_link_hash_undefined)
3139 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3147 /* We do not need this object file. */
3151 /* Add all symbols from an object file to the hash table. */
3154 aout_link_add_symbols (abfd, info)
3156 struct bfd_link_info *info;
3158 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3159 const char *, flagword, asection *,
3160 bfd_vma, const char *, boolean,
3162 struct bfd_link_hash_entry **));
3163 struct external_nlist *syms;
3164 bfd_size_type sym_count;
3167 struct aout_link_hash_entry **sym_hash;
3168 register struct external_nlist *p;
3169 struct external_nlist *pend;
3171 syms = obj_aout_external_syms (abfd);
3172 sym_count = obj_aout_external_sym_count (abfd);
3173 strings = obj_aout_external_strings (abfd);
3174 if (info->keep_memory)
3179 if ((abfd->flags & DYNAMIC) != 0
3180 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3182 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3183 (abfd, info, &syms, &sym_count, &strings)))
3187 /* We keep a list of the linker hash table entries that correspond
3188 to particular symbols. We could just look them up in the hash
3189 table, but keeping the list is more efficient. Perhaps this
3190 should be conditional on info->keep_memory. */
3191 sym_hash = ((struct aout_link_hash_entry **)
3194 * sizeof (struct aout_link_hash_entry *))));
3195 if (sym_hash == NULL && sym_count != 0)
3197 obj_aout_sym_hashes (abfd) = sym_hash;
3199 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3200 if (add_one_symbol == NULL)
3201 add_one_symbol = _bfd_generic_link_add_one_symbol;
3204 pend = p + sym_count;
3205 for (; p < pend; p++, sym_hash++)
3216 type = bfd_h_get_8 (abfd, p->e_type);
3218 /* Ignore debugging symbols. */
3219 if ((type & N_STAB) != 0)
3222 name = strings + GET_WORD (abfd, p->e_strx);
3223 value = GET_WORD (abfd, p->e_value);
3240 /* Ignore symbols that are not externally visible. */
3243 /* Ignore local indirect symbol. */
3248 case N_UNDF | N_EXT:
3251 section = bfd_und_section_ptr;
3255 section = bfd_com_section_ptr;
3258 section = bfd_abs_section_ptr;
3260 case N_TEXT | N_EXT:
3261 section = obj_textsec (abfd);
3262 value -= bfd_get_section_vma (abfd, section);
3264 case N_DATA | N_EXT:
3265 case N_SETV | N_EXT:
3266 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3267 translate_from_native_sym_flags. */
3268 section = obj_datasec (abfd);
3269 value -= bfd_get_section_vma (abfd, section);
3272 section = obj_bsssec (abfd);
3273 value -= bfd_get_section_vma (abfd, section);
3275 case N_INDR | N_EXT:
3276 /* An indirect symbol. The next symbol is the symbol
3277 which this one really is. */
3278 BFD_ASSERT (p + 1 < pend);
3280 string = strings + GET_WORD (abfd, p->e_strx);
3281 section = bfd_ind_section_ptr;
3282 flags |= BSF_INDIRECT;
3284 case N_COMM | N_EXT:
3285 section = bfd_com_section_ptr;
3287 case N_SETA: case N_SETA | N_EXT:
3288 section = bfd_abs_section_ptr;
3289 flags |= BSF_CONSTRUCTOR;
3291 case N_SETT: case N_SETT | N_EXT:
3292 section = obj_textsec (abfd);
3293 flags |= BSF_CONSTRUCTOR;
3294 value -= bfd_get_section_vma (abfd, section);
3296 case N_SETD: case N_SETD | N_EXT:
3297 section = obj_datasec (abfd);
3298 flags |= BSF_CONSTRUCTOR;
3299 value -= bfd_get_section_vma (abfd, section);
3301 case N_SETB: case N_SETB | N_EXT:
3302 section = obj_bsssec (abfd);
3303 flags |= BSF_CONSTRUCTOR;
3304 value -= bfd_get_section_vma (abfd, section);
3307 /* A warning symbol. The next symbol is the one to warn
3309 BFD_ASSERT (p + 1 < pend);
3312 name = strings + GET_WORD (abfd, p->e_strx);
3313 section = bfd_und_section_ptr;
3314 flags |= BSF_WARNING;
3317 section = bfd_und_section_ptr;
3321 section = bfd_abs_section_ptr;
3325 section = obj_textsec (abfd);
3326 value -= bfd_get_section_vma (abfd, section);
3330 section = obj_datasec (abfd);
3331 value -= bfd_get_section_vma (abfd, section);
3335 section = obj_bsssec (abfd);
3336 value -= bfd_get_section_vma (abfd, section);
3341 if (! ((*add_one_symbol)
3342 (info, abfd, name, flags, section, value, string, copy, false,
3343 (struct bfd_link_hash_entry **) sym_hash)))
3346 /* Restrict the maximum alignment of a common symbol based on
3347 the architecture, since a.out has no way to represent
3348 alignment requirements of a section in a .o file. FIXME:
3349 This isn't quite right: it should use the architecture of the
3350 output file, not the input files. */
3351 if ((*sym_hash)->root.type == bfd_link_hash_common
3352 && ((*sym_hash)->root.u.c.p->alignment_power >
3353 bfd_get_arch_info (abfd)->section_align_power))
3354 (*sym_hash)->root.u.c.p->alignment_power =
3355 bfd_get_arch_info (abfd)->section_align_power;
3357 /* If this is a set symbol, and we are not building sets, then
3358 it is possible for the hash entry to not have been set. In
3359 such a case, treat the symbol as not globally defined. */
3360 if ((*sym_hash)->root.type == bfd_link_hash_new)
3362 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3366 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3373 /* During the final link step we need to pass around a bunch of
3374 information, so we do it in an instance of this structure. */
3376 struct aout_final_link_info
3378 /* General link information. */
3379 struct bfd_link_info *info;
3382 /* Reloc file positions. */
3383 file_ptr treloff, dreloff;
3384 /* File position of symbols. */
3387 struct bfd_strtab_hash *strtab;
3388 /* A buffer large enough to hold the contents of any section. */
3390 /* A buffer large enough to hold the relocs of any section. */
3392 /* A buffer large enough to hold the symbol map of any input BFD. */
3394 /* A buffer large enough to hold output symbols of any input BFD. */
3395 struct external_nlist *output_syms;
3398 static boolean aout_link_input_bfd
3399 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3400 static boolean aout_link_write_symbols
3401 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3402 static boolean aout_link_write_other_symbol
3403 PARAMS ((struct aout_link_hash_entry *, PTR));
3404 static boolean aout_link_input_section
3405 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3406 asection *input_section, file_ptr *reloff_ptr,
3407 bfd_size_type rel_size));
3408 static boolean aout_link_input_section_std
3409 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3410 asection *input_section, struct reloc_std_external *,
3411 bfd_size_type rel_size, bfd_byte *contents));
3412 static boolean aout_link_input_section_ext
3413 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3414 asection *input_section, struct reloc_ext_external *,
3415 bfd_size_type rel_size, bfd_byte *contents));
3416 static INLINE asection *aout_reloc_index_to_section
3417 PARAMS ((bfd *, int));
3418 static boolean aout_link_reloc_link_order
3419 PARAMS ((struct aout_final_link_info *, asection *,
3420 struct bfd_link_order *));
3422 /* Do the final link step. This is called on the output BFD. The
3423 INFO structure should point to a list of BFDs linked through the
3424 link_next field which can be used to find each BFD which takes part
3425 in the output. Also, each section in ABFD should point to a list
3426 of bfd_link_order structures which list all the input sections for
3427 the output section. */
3430 NAME(aout,final_link) (abfd, info, callback)
3432 struct bfd_link_info *info;
3433 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3435 struct aout_final_link_info aout_info;
3437 bfd_size_type trsize, drsize;
3438 size_t max_contents_size;
3439 size_t max_relocs_size;
3440 size_t max_sym_count;
3441 bfd_size_type text_size;
3443 register struct bfd_link_order *p;
3445 boolean have_link_order_relocs;
3448 abfd->flags |= DYNAMIC;
3450 aout_info.info = info;
3451 aout_info.output_bfd = abfd;
3452 aout_info.contents = NULL;
3453 aout_info.relocs = NULL;
3455 /* Figure out the largest section size. Also, if generating
3456 relocateable output, count the relocs. */
3459 max_contents_size = 0;
3460 max_relocs_size = 0;
3462 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3466 if (info->relocateable)
3468 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3470 trsize += exec_hdr (sub)->a_trsize;
3471 drsize += exec_hdr (sub)->a_drsize;
3475 /* FIXME: We need to identify the .text and .data sections
3476 and call get_reloc_upper_bound and canonicalize_reloc to
3477 work out the number of relocs needed, and then multiply
3478 by the reloc size. */
3479 (*_bfd_error_handler)
3480 ("%s: relocateable link from %s to %s not supported",
3481 bfd_get_filename (abfd),
3482 sub->xvec->name, abfd->xvec->name);
3483 bfd_set_error (bfd_error_invalid_operation);
3488 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3490 sz = bfd_section_size (sub, obj_textsec (sub));
3491 if (sz > max_contents_size)
3492 max_contents_size = sz;
3493 sz = bfd_section_size (sub, obj_datasec (sub));
3494 if (sz > max_contents_size)
3495 max_contents_size = sz;
3497 sz = exec_hdr (sub)->a_trsize;
3498 if (sz > max_relocs_size)
3499 max_relocs_size = sz;
3500 sz = exec_hdr (sub)->a_drsize;
3501 if (sz > max_relocs_size)
3502 max_relocs_size = sz;
3504 sz = obj_aout_external_sym_count (sub);
3505 if (sz > max_sym_count)
3510 if (info->relocateable)
3512 if (obj_textsec (abfd) != (asection *) NULL)
3513 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3515 * obj_reloc_entry_size (abfd));
3516 if (obj_datasec (abfd) != (asection *) NULL)
3517 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3519 * obj_reloc_entry_size (abfd));
3522 exec_hdr (abfd)->a_trsize = trsize;
3523 exec_hdr (abfd)->a_drsize = drsize;
3525 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3527 /* Adjust the section sizes and vmas according to the magic number.
3528 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3529 filepos for each section. */
3530 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3533 /* The relocation and symbol file positions differ among a.out
3534 targets. We are passed a callback routine from the backend
3535 specific code to handle this.
3536 FIXME: At this point we do not know how much space the symbol
3537 table will require. This will not work for any (nonstandard)
3538 a.out target that needs to know the symbol table size before it
3539 can compute the relocation file positions. This may or may not
3540 be the case for the hp300hpux target, for example. */
3541 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3543 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3544 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3545 obj_sym_filepos (abfd) = aout_info.symoff;
3547 /* We keep a count of the symbols as we output them. */
3548 obj_aout_external_sym_count (abfd) = 0;
3550 /* We accumulate the string table as we write out the symbols. */
3551 aout_info.strtab = _bfd_stringtab_init ();
3552 if (aout_info.strtab == NULL)
3555 /* Allocate buffers to hold section contents and relocs. */
3556 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3557 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3558 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3559 aout_info.output_syms = ((struct external_nlist *)
3560 bfd_malloc ((max_sym_count + 1)
3561 * sizeof (struct external_nlist)));
3562 if ((aout_info.contents == NULL && max_contents_size != 0)
3563 || (aout_info.relocs == NULL && max_relocs_size != 0)
3564 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3565 || aout_info.output_syms == NULL)
3568 /* If we have a symbol named __DYNAMIC, force it out now. This is
3569 required by SunOS. Doing this here rather than in sunos.c is a
3570 hack, but it's easier than exporting everything which would be
3573 struct aout_link_hash_entry *h;
3575 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3576 false, false, false);
3578 aout_link_write_other_symbol (h, &aout_info);
3581 /* The most time efficient way to do the link would be to read all
3582 the input object files into memory and then sort out the
3583 information into the output file. Unfortunately, that will
3584 probably use too much memory. Another method would be to step
3585 through everything that composes the text section and write it
3586 out, and then everything that composes the data section and write
3587 it out, and then write out the relocs, and then write out the
3588 symbols. Unfortunately, that requires reading stuff from each
3589 input file several times, and we will not be able to keep all the
3590 input files open simultaneously, and reopening them will be slow.
3592 What we do is basically process one input file at a time. We do
3593 everything we need to do with an input file once--copy over the
3594 section contents, handle the relocation information, and write
3595 out the symbols--and then we throw away the information we read
3596 from it. This approach requires a lot of lseeks of the output
3597 file, which is unfortunate but still faster than reopening a lot
3600 We use the output_has_begun field of the input BFDs to see
3601 whether we have already handled it. */
3602 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3603 sub->output_has_begun = false;
3605 have_link_order_relocs = false;
3606 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3608 for (p = o->link_order_head;
3609 p != (struct bfd_link_order *) NULL;
3612 if (p->type == bfd_indirect_link_order
3613 && (bfd_get_flavour (p->u.indirect.section->owner)
3614 == bfd_target_aout_flavour))
3618 input_bfd = p->u.indirect.section->owner;
3619 if (! input_bfd->output_has_begun)
3621 if (! aout_link_input_bfd (&aout_info, input_bfd))
3623 input_bfd->output_has_begun = true;
3626 else if (p->type == bfd_section_reloc_link_order
3627 || p->type == bfd_symbol_reloc_link_order)
3629 /* These are handled below. */
3630 have_link_order_relocs = true;
3634 if (! _bfd_default_link_order (abfd, info, o, p))
3640 /* Write out any symbols that we have not already written out. */
3641 aout_link_hash_traverse (aout_hash_table (info),
3642 aout_link_write_other_symbol,
3645 /* Now handle any relocs we were asked to create by the linker.
3646 These did not come from any input file. We must do these after
3647 we have written out all the symbols, so that we know the symbol
3649 if (have_link_order_relocs)
3651 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3653 for (p = o->link_order_head;
3654 p != (struct bfd_link_order *) NULL;
3657 if (p->type == bfd_section_reloc_link_order
3658 || p->type == bfd_symbol_reloc_link_order)
3660 if (! aout_link_reloc_link_order (&aout_info, o, p))
3667 if (aout_info.contents != NULL)
3669 free (aout_info.contents);
3670 aout_info.contents = NULL;
3672 if (aout_info.relocs != NULL)
3674 free (aout_info.relocs);
3675 aout_info.relocs = NULL;
3677 if (aout_info.symbol_map != NULL)
3679 free (aout_info.symbol_map);
3680 aout_info.symbol_map = NULL;
3682 if (aout_info.output_syms != NULL)
3684 free (aout_info.output_syms);
3685 aout_info.output_syms = NULL;
3688 /* Finish up any dynamic linking we may be doing. */
3689 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3691 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3695 /* Update the header information. */
3696 abfd->symcount = obj_aout_external_sym_count (abfd);
3697 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3698 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3699 obj_textsec (abfd)->reloc_count =
3700 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3701 obj_datasec (abfd)->reloc_count =
3702 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3704 /* Write out the string table. */
3705 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3707 return emit_stringtab (abfd, aout_info.strtab);
3710 if (aout_info.contents != NULL)
3711 free (aout_info.contents);
3712 if (aout_info.relocs != NULL)
3713 free (aout_info.relocs);
3714 if (aout_info.symbol_map != NULL)
3715 free (aout_info.symbol_map);
3716 if (aout_info.output_syms != NULL)
3717 free (aout_info.output_syms);
3721 /* Link an a.out input BFD into the output file. */
3724 aout_link_input_bfd (finfo, input_bfd)
3725 struct aout_final_link_info *finfo;
3728 bfd_size_type sym_count;
3730 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3732 /* If this is a dynamic object, it may need special handling. */
3733 if ((input_bfd->flags & DYNAMIC) != 0
3734 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3736 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3737 (finfo->info, input_bfd));
3740 /* Get the symbols. We probably have them already, unless
3741 finfo->info->keep_memory is false. */
3742 if (! aout_get_external_symbols (input_bfd))
3745 sym_count = obj_aout_external_sym_count (input_bfd);
3747 /* Write out the symbols and get a map of the new indices. The map
3748 is placed into finfo->symbol_map. */
3749 if (! aout_link_write_symbols (finfo, input_bfd))
3752 /* Relocate and write out the sections. These functions use the
3753 symbol map created by aout_link_write_symbols. */
3754 if (! aout_link_input_section (finfo, input_bfd,
3755 obj_textsec (input_bfd),
3757 exec_hdr (input_bfd)->a_trsize)
3758 || ! aout_link_input_section (finfo, input_bfd,
3759 obj_datasec (input_bfd),
3761 exec_hdr (input_bfd)->a_drsize))
3764 /* If we are not keeping memory, we don't need the symbols any
3765 longer. We still need them if we are keeping memory, because the
3766 strings in the hash table point into them. */
3767 if (! finfo->info->keep_memory)
3769 if (! aout_link_free_symbols (input_bfd))
3776 /* Adjust and write out the symbols for an a.out file. Set the new
3777 symbol indices into a symbol_map. */
3780 aout_link_write_symbols (finfo, input_bfd)
3781 struct aout_final_link_info *finfo;
3785 bfd_size_type sym_count;
3787 enum bfd_link_strip strip;
3788 enum bfd_link_discard discard;
3789 struct external_nlist *outsym;
3790 bfd_size_type strtab_index;
3791 register struct external_nlist *sym;
3792 struct external_nlist *sym_end;
3793 struct aout_link_hash_entry **sym_hash;
3798 output_bfd = finfo->output_bfd;
3799 sym_count = obj_aout_external_sym_count (input_bfd);
3800 strings = obj_aout_external_strings (input_bfd);
3801 strip = finfo->info->strip;
3802 discard = finfo->info->discard;
3803 outsym = finfo->output_syms;
3805 /* First write out a symbol for this object file, unless we are
3806 discarding such symbols. */
3807 if (strip != strip_all
3808 && (strip != strip_some
3809 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3810 false, false) != NULL)
3811 && discard != discard_all)
3813 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3814 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3815 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3816 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
3817 input_bfd->filename, false);
3818 if (strtab_index == (bfd_size_type) -1)
3820 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
3821 PUT_WORD (output_bfd,
3822 (bfd_get_section_vma (output_bfd,
3823 obj_textsec (input_bfd)->output_section)
3824 + obj_textsec (input_bfd)->output_offset),
3826 ++obj_aout_external_sym_count (output_bfd);
3832 sym = obj_aout_external_syms (input_bfd);
3833 sym_end = sym + sym_count;
3834 sym_hash = obj_aout_sym_hashes (input_bfd);
3835 symbol_map = finfo->symbol_map;
3836 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3840 struct aout_link_hash_entry *h;
3848 type = bfd_h_get_8 (input_bfd, sym->e_type);
3849 name = strings + GET_WORD (input_bfd, sym->e_strx);
3855 /* Pass this symbol through. It is the target of an
3856 indirect or warning symbol. */
3857 val = GET_WORD (input_bfd, sym->e_value);
3862 /* Skip this symbol, which is the target of an indirect
3863 symbol that we have changed to no longer be an indirect
3870 struct aout_link_hash_entry *hresolve;
3872 /* We have saved the hash table entry for this symbol, if
3873 there is one. Note that we could just look it up again
3874 in the hash table, provided we first check that it is an
3878 /* If this is an indirect or warning symbol, then change
3879 hresolve to the base symbol. We also change *sym_hash so
3880 that the relocation routines relocate against the real
3883 if (h != (struct aout_link_hash_entry *) NULL
3884 && (h->root.type == bfd_link_hash_indirect
3885 || h->root.type == bfd_link_hash_warning))
3887 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
3888 while (hresolve->root.type == bfd_link_hash_indirect
3889 || hresolve->root.type == bfd_link_hash_warning)
3890 hresolve = ((struct aout_link_hash_entry *)
3891 hresolve->root.u.i.link);
3892 *sym_hash = hresolve;
3895 /* If the symbol has already been written out, skip it. */
3896 if (h != (struct aout_link_hash_entry *) NULL
3897 && h->root.type != bfd_link_hash_warning
3900 if ((type & N_TYPE) == N_INDR
3901 || type == N_WARNING)
3903 *symbol_map = h->indx;
3907 /* See if we are stripping this symbol. */
3913 case strip_debugger:
3914 if ((type & N_STAB) != 0)
3918 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
3928 if (h != (struct aout_link_hash_entry *) NULL)
3933 /* Get the value of the symbol. */
3934 if ((type & N_TYPE) == N_TEXT
3936 symsec = obj_textsec (input_bfd);
3937 else if ((type & N_TYPE) == N_DATA
3939 symsec = obj_datasec (input_bfd);
3940 else if ((type & N_TYPE) == N_BSS
3942 symsec = obj_bsssec (input_bfd);
3943 else if ((type & N_TYPE) == N_ABS
3945 symsec = bfd_abs_section_ptr;
3946 else if (((type & N_TYPE) == N_INDR
3947 && (hresolve == (struct aout_link_hash_entry *) NULL
3948 || (hresolve->root.type != bfd_link_hash_defined
3949 && hresolve->root.type != bfd_link_hash_defweak
3950 && hresolve->root.type != bfd_link_hash_common)))
3951 || type == N_WARNING)
3953 /* Pass the next symbol through unchanged. The
3954 condition above for indirect symbols is so that if
3955 the indirect symbol was defined, we output it with
3956 the correct definition so the debugger will
3959 val = GET_WORD (input_bfd, sym->e_value);
3962 else if ((type & N_STAB) != 0)
3964 val = GET_WORD (input_bfd, sym->e_value);
3969 /* If we get here with an indirect symbol, it means that
3970 we are outputting it with a real definition. In such
3971 a case we do not want to output the next symbol,
3972 which is the target of the indirection. */
3973 if ((type & N_TYPE) == N_INDR)
3978 /* We need to get the value from the hash table. We use
3979 hresolve so that if we have defined an indirect
3980 symbol we output the final definition. */
3981 if (h == (struct aout_link_hash_entry *) NULL)
3983 switch (type & N_TYPE)
3986 symsec = obj_textsec (input_bfd);
3989 symsec = obj_datasec (input_bfd);
3992 symsec = obj_bsssec (input_bfd);
3995 symsec = bfd_abs_section_ptr;
4002 else if (hresolve->root.type == bfd_link_hash_defined
4003 || hresolve->root.type == bfd_link_hash_defweak)
4005 asection *input_section;
4006 asection *output_section;
4008 /* This case usually means a common symbol which was
4009 turned into a defined symbol. */
4010 input_section = hresolve->root.u.def.section;
4011 output_section = input_section->output_section;
4012 BFD_ASSERT (bfd_is_abs_section (output_section)
4013 || output_section->owner == output_bfd);
4014 val = (hresolve->root.u.def.value
4015 + bfd_get_section_vma (output_bfd, output_section)
4016 + input_section->output_offset);
4018 /* Get the correct type based on the section. If
4019 this is a constructed set, force it to be
4020 globally visible. */
4029 if (output_section == obj_textsec (output_bfd))
4030 type |= (hresolve->root.type == bfd_link_hash_defined
4033 else if (output_section == obj_datasec (output_bfd))
4034 type |= (hresolve->root.type == bfd_link_hash_defined
4037 else if (output_section == obj_bsssec (output_bfd))
4038 type |= (hresolve->root.type == bfd_link_hash_defined
4042 type |= (hresolve->root.type == bfd_link_hash_defined
4046 else if (hresolve->root.type == bfd_link_hash_common)
4047 val = hresolve->root.u.c.size;
4048 else if (hresolve->root.type == bfd_link_hash_undefweak)
4056 if (symsec != (asection *) NULL)
4057 val = (symsec->output_section->vma
4058 + symsec->output_offset
4059 + (GET_WORD (input_bfd, sym->e_value)
4062 /* If this is a global symbol set the written flag, and if
4063 it is a local symbol see if we should discard it. */
4064 if (h != (struct aout_link_hash_entry *) NULL)
4067 h->indx = obj_aout_external_sym_count (output_bfd);
4069 else if ((type & N_TYPE) != N_SETT
4070 && (type & N_TYPE) != N_SETD
4071 && (type & N_TYPE) != N_SETB
4072 && (type & N_TYPE) != N_SETA)
4079 if (*name == *finfo->info->lprefix
4080 && (finfo->info->lprefix_len == 1
4081 || strncmp (name, finfo->info->lprefix,
4082 finfo->info->lprefix_len) == 0))
4097 /* Copy this symbol into the list of symbols we are going to
4099 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4100 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4102 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4105 if (! finfo->info->keep_memory)
4107 /* name points into a string table which we are going to
4108 free. If there is a hash table entry, use that string.
4109 Otherwise, copy name into memory. */
4110 if (h != (struct aout_link_hash_entry *) NULL)
4111 name = h->root.root.string;
4115 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4117 if (strtab_index == (bfd_size_type) -1)
4119 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4120 PUT_WORD (output_bfd, val, outsym->e_value);
4121 *symbol_map = obj_aout_external_sym_count (output_bfd);
4122 ++obj_aout_external_sym_count (output_bfd);
4126 /* Write out the output symbols we have just constructed. */
4127 if (outsym > finfo->output_syms)
4129 bfd_size_type outsym_count;
4131 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4133 outsym_count = outsym - finfo->output_syms;
4134 if (bfd_write ((PTR) finfo->output_syms,
4135 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4136 (bfd_size_type) outsym_count, output_bfd)
4137 != outsym_count * EXTERNAL_NLIST_SIZE)
4139 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4145 /* Write out a symbol that was not associated with an a.out input
4149 aout_link_write_other_symbol (h, data)
4150 struct aout_link_hash_entry *h;
4153 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4157 struct external_nlist outsym;
4160 output_bfd = finfo->output_bfd;
4162 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4164 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4165 (output_bfd, finfo->info, h)))
4167 /* FIXME: No way to handle errors. */
4177 /* An indx of -2 means the symbol must be written. */
4179 && (finfo->info->strip == strip_all
4180 || (finfo->info->strip == strip_some
4181 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4182 false, false) == NULL)))
4185 switch (h->root.type)
4189 /* Avoid variable not initialized warnings. */
4191 case bfd_link_hash_new:
4192 /* This can happen for set symbols when sets are not being
4195 case bfd_link_hash_undefined:
4196 type = N_UNDF | N_EXT;
4199 case bfd_link_hash_defined:
4200 case bfd_link_hash_defweak:
4204 sec = h->root.u.def.section->output_section;
4205 BFD_ASSERT (bfd_is_abs_section (sec)
4206 || sec->owner == output_bfd);
4207 if (sec == obj_textsec (output_bfd))
4208 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4209 else if (sec == obj_datasec (output_bfd))
4210 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4211 else if (sec == obj_bsssec (output_bfd))
4212 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4214 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4216 val = (h->root.u.def.value
4218 + h->root.u.def.section->output_offset);
4221 case bfd_link_hash_common:
4222 type = N_UNDF | N_EXT;
4223 val = h->root.u.c.size;
4225 case bfd_link_hash_undefweak:
4228 case bfd_link_hash_indirect:
4229 case bfd_link_hash_warning:
4230 /* FIXME: Ignore these for now. The circumstances under which
4231 they should be written out are not clear to me. */
4235 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4236 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4237 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4238 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4240 if (indx == (bfd_size_type) -1)
4242 /* FIXME: No way to handle errors. */
4245 PUT_WORD (output_bfd, indx, outsym.e_strx);
4246 PUT_WORD (output_bfd, val, outsym.e_value);
4248 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4249 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4250 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4252 /* FIXME: No way to handle errors. */
4256 finfo->symoff += EXTERNAL_NLIST_SIZE;
4257 h->indx = obj_aout_external_sym_count (output_bfd);
4258 ++obj_aout_external_sym_count (output_bfd);
4263 /* Link an a.out section into the output file. */
4266 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4268 struct aout_final_link_info *finfo;
4270 asection *input_section;
4271 file_ptr *reloff_ptr;
4272 bfd_size_type rel_size;
4274 bfd_size_type input_size;
4277 /* Get the section contents. */
4278 input_size = bfd_section_size (input_bfd, input_section);
4279 if (! bfd_get_section_contents (input_bfd, input_section,
4280 (PTR) finfo->contents,
4281 (file_ptr) 0, input_size))
4284 /* Read in the relocs if we haven't already done it. */
4285 if (aout_section_data (input_section) != NULL
4286 && aout_section_data (input_section)->relocs != NULL)
4287 relocs = aout_section_data (input_section)->relocs;
4290 relocs = finfo->relocs;
4293 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4294 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4299 /* Relocate the section contents. */
4300 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4302 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4303 (struct reloc_std_external *) relocs,
4304 rel_size, finfo->contents))
4309 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4310 (struct reloc_ext_external *) relocs,
4311 rel_size, finfo->contents))
4315 /* Write out the section contents. */
4316 if (! bfd_set_section_contents (finfo->output_bfd,
4317 input_section->output_section,
4318 (PTR) finfo->contents,
4319 input_section->output_offset,
4323 /* If we are producing relocateable output, the relocs were
4324 modified, and we now write them out. */
4325 if (finfo->info->relocateable && rel_size > 0)
4327 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4329 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4332 *reloff_ptr += rel_size;
4334 /* Assert that the relocs have not run into the symbols, and
4335 that if these are the text relocs they have not run into the
4337 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4338 && (reloff_ptr != &finfo->treloff
4340 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4346 /* Get the section corresponding to a reloc index. */
4348 static INLINE asection *
4349 aout_reloc_index_to_section (abfd, indx)
4353 switch (indx & N_TYPE)
4356 return obj_textsec (abfd);
4358 return obj_datasec (abfd);
4360 return obj_bsssec (abfd);
4363 return bfd_abs_section_ptr;
4369 /* Relocate an a.out section using standard a.out relocs. */
4372 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4374 struct aout_final_link_info *finfo;
4376 asection *input_section;
4377 struct reloc_std_external *relocs;
4378 bfd_size_type rel_size;
4381 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4383 struct aout_link_hash_entry *,
4384 PTR, bfd_byte *, boolean *,
4387 boolean relocateable;
4388 struct external_nlist *syms;
4390 struct aout_link_hash_entry **sym_hashes;
4392 bfd_size_type reloc_count;
4393 register struct reloc_std_external *rel;
4394 struct reloc_std_external *rel_end;
4396 output_bfd = finfo->output_bfd;
4397 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4399 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4400 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4401 == output_bfd->xvec->header_byteorder_big_p);
4403 relocateable = finfo->info->relocateable;
4404 syms = obj_aout_external_syms (input_bfd);
4405 strings = obj_aout_external_strings (input_bfd);
4406 sym_hashes = obj_aout_sym_hashes (input_bfd);
4407 symbol_map = finfo->symbol_map;
4409 reloc_count = rel_size / RELOC_STD_SIZE;
4411 rel_end = rel + reloc_count;
4412 for (; rel < rel_end; rel++)
4419 reloc_howto_type *howto;
4420 struct aout_link_hash_entry *h = NULL;
4422 bfd_reloc_status_type r;
4424 r_addr = GET_SWORD (input_bfd, rel->r_address);
4426 #ifdef MY_reloc_howto
4427 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4433 unsigned int howto_idx;
4435 if (input_bfd->xvec->header_byteorder_big_p)
4437 r_index = ((rel->r_index[0] << 16)
4438 | (rel->r_index[1] << 8)
4440 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4441 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4442 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4443 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4444 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4445 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4446 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4450 r_index = ((rel->r_index[2] << 16)
4451 | (rel->r_index[1] << 8)
4453 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4454 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4455 r_baserel = (0 != (rel->r_type[0]
4456 & RELOC_STD_BITS_BASEREL_LITTLE));
4457 r_jmptable= (0 != (rel->r_type[0]
4458 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4459 r_relative= (0 != (rel->r_type[0]
4460 & RELOC_STD_BITS_RELATIVE_LITTLE));
4461 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4462 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4465 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4466 + 16 * r_jmptable + 32 * r_relative);
4467 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4468 howto = howto_table_std + howto_idx;
4474 /* We are generating a relocateable output file, and must
4475 modify the reloc accordingly. */
4478 /* If we know the symbol this relocation is against,
4479 convert it into a relocation against a section. This
4480 is what the native linker does. */
4481 h = sym_hashes[r_index];
4482 if (h != (struct aout_link_hash_entry *) NULL
4483 && (h->root.type == bfd_link_hash_defined
4484 || h->root.type == bfd_link_hash_defweak))
4486 asection *output_section;
4488 /* Change the r_extern value. */
4489 if (output_bfd->xvec->header_byteorder_big_p)
4490 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4492 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4494 /* Compute a new r_index. */
4495 output_section = h->root.u.def.section->output_section;
4496 if (output_section == obj_textsec (output_bfd))
4498 else if (output_section == obj_datasec (output_bfd))
4500 else if (output_section == obj_bsssec (output_bfd))
4505 /* Add the symbol value and the section VMA to the
4506 addend stored in the contents. */
4507 relocation = (h->root.u.def.value
4508 + output_section->vma
4509 + h->root.u.def.section->output_offset);
4513 /* We must change r_index according to the symbol
4515 r_index = symbol_map[r_index];
4521 /* We decided to strip this symbol, but it
4522 turns out that we can't. Note that we
4523 lose the other and desc information here.
4524 I don't think that will ever matter for a
4530 if (! aout_link_write_other_symbol (h,
4540 name = strings + GET_WORD (input_bfd,
4541 syms[r_index].e_strx);
4542 if (! ((*finfo->info->callbacks->unattached_reloc)
4543 (finfo->info, name, input_bfd, input_section,
4553 /* Write out the new r_index value. */
4554 if (output_bfd->xvec->header_byteorder_big_p)
4556 rel->r_index[0] = r_index >> 16;
4557 rel->r_index[1] = r_index >> 8;
4558 rel->r_index[2] = r_index;
4562 rel->r_index[2] = r_index >> 16;
4563 rel->r_index[1] = r_index >> 8;
4564 rel->r_index[0] = r_index;
4571 /* This is a relocation against a section. We must
4572 adjust by the amount that the section moved. */
4573 section = aout_reloc_index_to_section (input_bfd, r_index);
4574 relocation = (section->output_section->vma
4575 + section->output_offset
4579 /* Change the address of the relocation. */
4580 PUT_WORD (output_bfd,
4581 r_addr + input_section->output_offset,
4584 /* Adjust a PC relative relocation by removing the reference
4585 to the original address in the section and including the
4586 reference to the new address. */
4588 relocation -= (input_section->output_section->vma
4589 + input_section->output_offset
4590 - input_section->vma);
4592 #ifdef MY_relocatable_reloc
4593 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4596 if (relocation == 0)
4599 r = MY_relocate_contents (howto,
4600 input_bfd, relocation,
4607 /* We are generating an executable, and must do a full
4612 h = sym_hashes[r_index];
4614 if (h != (struct aout_link_hash_entry *) NULL
4615 && (h->root.type == bfd_link_hash_defined
4616 || h->root.type == bfd_link_hash_defweak))
4618 relocation = (h->root.u.def.value
4619 + h->root.u.def.section->output_section->vma
4620 + h->root.u.def.section->output_offset);
4622 else if (h != (struct aout_link_hash_entry *) NULL
4623 && h->root.type == bfd_link_hash_undefweak)
4635 section = aout_reloc_index_to_section (input_bfd, r_index);
4636 relocation = (section->output_section->vma
4637 + section->output_offset
4640 relocation += input_section->vma;
4643 if (check_dynamic_reloc != NULL)
4647 if (! ((*check_dynamic_reloc)
4648 (finfo->info, input_bfd, input_section, h,
4649 (PTR) rel, contents, &skip, &relocation)))
4655 /* Now warn if a global symbol is undefined. We could not
4656 do this earlier, because check_dynamic_reloc might want
4657 to skip this reloc. */
4658 if (hundef && ! finfo->info->shared && ! r_baserel)
4662 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4663 if (! ((*finfo->info->callbacks->undefined_symbol)
4664 (finfo->info, name, input_bfd, input_section, r_addr)))
4668 r = MY_final_link_relocate (howto,
4669 input_bfd, input_section,
4670 contents, r_addr, relocation,
4674 if (r != bfd_reloc_ok)
4679 case bfd_reloc_outofrange:
4681 case bfd_reloc_overflow:
4686 name = strings + GET_WORD (input_bfd,
4687 syms[r_index].e_strx);
4692 s = aout_reloc_index_to_section (input_bfd, r_index);
4693 name = bfd_section_name (input_bfd, s);
4695 if (! ((*finfo->info->callbacks->reloc_overflow)
4696 (finfo->info, name, howto->name,
4697 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4708 /* Relocate an a.out section using extended a.out relocs. */
4711 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4713 struct aout_final_link_info *finfo;
4715 asection *input_section;
4716 struct reloc_ext_external *relocs;
4717 bfd_size_type rel_size;
4720 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4722 struct aout_link_hash_entry *,
4723 PTR, bfd_byte *, boolean *,
4726 boolean relocateable;
4727 struct external_nlist *syms;
4729 struct aout_link_hash_entry **sym_hashes;
4731 bfd_size_type reloc_count;
4732 register struct reloc_ext_external *rel;
4733 struct reloc_ext_external *rel_end;
4735 output_bfd = finfo->output_bfd;
4736 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4738 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4739 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4740 == output_bfd->xvec->header_byteorder_big_p);
4742 relocateable = finfo->info->relocateable;
4743 syms = obj_aout_external_syms (input_bfd);
4744 strings = obj_aout_external_strings (input_bfd);
4745 sym_hashes = obj_aout_sym_hashes (input_bfd);
4746 symbol_map = finfo->symbol_map;
4748 reloc_count = rel_size / RELOC_EXT_SIZE;
4750 rel_end = rel + reloc_count;
4751 for (; rel < rel_end; rel++)
4756 unsigned int r_type;
4758 struct aout_link_hash_entry *h = NULL;
4759 asection *r_section = NULL;
4762 r_addr = GET_SWORD (input_bfd, rel->r_address);
4764 if (input_bfd->xvec->header_byteorder_big_p)
4766 r_index = ((rel->r_index[0] << 16)
4767 | (rel->r_index[1] << 8)
4769 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4770 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4771 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4775 r_index = ((rel->r_index[2] << 16)
4776 | (rel->r_index[1] << 8)
4778 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4779 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4780 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4783 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4785 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4789 /* We are generating a relocateable output file, and must
4790 modify the reloc accordingly. */
4793 /* If we know the symbol this relocation is against,
4794 convert it into a relocation against a section. This
4795 is what the native linker does. */
4796 h = sym_hashes[r_index];
4797 if (h != (struct aout_link_hash_entry *) NULL
4798 && (h->root.type == bfd_link_hash_defined
4799 || h->root.type == bfd_link_hash_defweak))
4801 asection *output_section;
4803 /* Change the r_extern value. */
4804 if (output_bfd->xvec->header_byteorder_big_p)
4805 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4807 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4809 /* Compute a new r_index. */
4810 output_section = h->root.u.def.section->output_section;
4811 if (output_section == obj_textsec (output_bfd))
4813 else if (output_section == obj_datasec (output_bfd))
4815 else if (output_section == obj_bsssec (output_bfd))
4820 /* Add the symbol value and the section VMA to the
4822 relocation = (h->root.u.def.value
4823 + output_section->vma
4824 + h->root.u.def.section->output_offset);
4826 /* Now RELOCATION is the VMA of the final
4827 destination. If this is a PC relative reloc,
4828 then ADDEND is the negative of the source VMA.
4829 We want to set ADDEND to the difference between
4830 the destination VMA and the source VMA, which
4831 means we must adjust RELOCATION by the change in
4832 the source VMA. This is done below. */
4836 /* We must change r_index according to the symbol
4838 r_index = symbol_map[r_index];
4844 /* We decided to strip this symbol, but it
4845 turns out that we can't. Note that we
4846 lose the other and desc information here.
4847 I don't think that will ever matter for a
4853 if (! aout_link_write_other_symbol (h,
4863 name = strings + GET_WORD (input_bfd,
4864 syms[r_index].e_strx);
4865 if (! ((*finfo->info->callbacks->unattached_reloc)
4866 (finfo->info, name, input_bfd, input_section,
4875 /* If this is a PC relative reloc, then the addend
4876 is the negative of the source VMA. We must
4877 adjust it by the change in the source VMA. This
4881 /* Write out the new r_index value. */
4882 if (output_bfd->xvec->header_byteorder_big_p)
4884 rel->r_index[0] = r_index >> 16;
4885 rel->r_index[1] = r_index >> 8;
4886 rel->r_index[2] = r_index;
4890 rel->r_index[2] = r_index >> 16;
4891 rel->r_index[1] = r_index >> 8;
4892 rel->r_index[0] = r_index;
4897 /* This is a relocation against a section. We must
4898 adjust by the amount that the section moved. */
4899 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4900 relocation = (r_section->output_section->vma
4901 + r_section->output_offset
4904 /* If this is a PC relative reloc, then the addend is
4905 the difference in VMA between the destination and the
4906 source. We have just adjusted for the change in VMA
4907 of the destination, so we must also adjust by the
4908 change in VMA of the source. This is done below. */
4911 /* As described above, we must always adjust a PC relative
4912 reloc by the change in VMA of the source. */
4913 if (howto_table_ext[r_type].pc_relative)
4914 relocation -= (input_section->output_section->vma
4915 + input_section->output_offset
4916 - input_section->vma);
4918 /* Change the addend if necessary. */
4919 if (relocation != 0)
4920 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4922 /* Change the address of the relocation. */
4923 PUT_WORD (output_bfd,
4924 r_addr + input_section->output_offset,
4930 bfd_reloc_status_type r;
4932 /* We are generating an executable, and must do a full
4937 h = sym_hashes[r_index];
4939 if (h != (struct aout_link_hash_entry *) NULL
4940 && (h->root.type == bfd_link_hash_defined
4941 || h->root.type == bfd_link_hash_defweak))
4943 relocation = (h->root.u.def.value
4944 + h->root.u.def.section->output_section->vma
4945 + h->root.u.def.section->output_offset);
4947 else if (h != (struct aout_link_hash_entry *) NULL
4948 && h->root.type == bfd_link_hash_undefweak)
4956 else if (r_type == RELOC_BASE10
4957 || r_type == RELOC_BASE13
4958 || r_type == RELOC_BASE22)
4960 struct external_nlist *sym;
4963 /* For base relative relocs, r_index is always an index
4964 into the symbol table, even if r_extern is 0. */
4965 sym = syms + r_index;
4966 type = bfd_h_get_8 (input_bfd, sym->e_type);
4967 if ((type & N_TYPE) == N_TEXT
4969 r_section = obj_textsec (input_bfd);
4970 else if ((type & N_TYPE) == N_DATA
4972 r_section = obj_datasec (input_bfd);
4973 else if ((type & N_TYPE) == N_BSS
4975 r_section = obj_bsssec (input_bfd);
4976 else if ((type & N_TYPE) == N_ABS
4978 r_section = bfd_abs_section_ptr;
4981 relocation = (r_section->output_section->vma
4982 + r_section->output_offset
4983 + (GET_WORD (input_bfd, sym->e_value)
4988 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4990 /* If this is a PC relative reloc, then R_ADDEND is the
4991 difference between the two vmas, or
4992 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4994 old_dest_sec == section->vma
4996 old_src_sec == input_section->vma
4998 old_src_off == r_addr
5000 _bfd_final_link_relocate expects RELOCATION +
5001 R_ADDEND to be the VMA of the destination minus
5002 r_addr (the minus r_addr is because this relocation
5003 is not pcrel_offset, which is a bit confusing and
5004 should, perhaps, be changed), or
5007 new_dest_sec == output_section->vma + output_offset
5008 We arrange for this to happen by setting RELOCATION to
5009 new_dest_sec + old_src_sec - old_dest_sec
5011 If this is not a PC relative reloc, then R_ADDEND is
5012 simply the VMA of the destination, so we set
5013 RELOCATION to the change in the destination VMA, or
5014 new_dest_sec - old_dest_sec
5016 relocation = (r_section->output_section->vma
5017 + r_section->output_offset
5019 if (howto_table_ext[r_type].pc_relative)
5020 relocation += input_section->vma;
5023 if (check_dynamic_reloc != NULL)
5027 if (! ((*check_dynamic_reloc)
5028 (finfo->info, input_bfd, input_section, h,
5029 (PTR) rel, contents, &skip, &relocation)))
5035 /* Now warn if a global symbol is undefined. We could not
5036 do this earlier, because check_dynamic_reloc might want
5037 to skip this reloc. */
5039 && ! finfo->info->shared
5040 && r_type != RELOC_BASE10
5041 && r_type != RELOC_BASE13
5042 && r_type != RELOC_BASE22)
5046 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5047 if (! ((*finfo->info->callbacks->undefined_symbol)
5048 (finfo->info, name, input_bfd, input_section, r_addr)))
5052 r = MY_final_link_relocate (howto_table_ext + r_type,
5053 input_bfd, input_section,
5054 contents, r_addr, relocation,
5056 if (r != bfd_reloc_ok)
5061 case bfd_reloc_outofrange:
5063 case bfd_reloc_overflow:
5068 || r_type == RELOC_BASE10
5069 || r_type == RELOC_BASE13
5070 || r_type == RELOC_BASE22)
5071 name = strings + GET_WORD (input_bfd,
5072 syms[r_index].e_strx);
5077 s = aout_reloc_index_to_section (input_bfd, r_index);
5078 name = bfd_section_name (input_bfd, s);
5080 if (! ((*finfo->info->callbacks->reloc_overflow)
5081 (finfo->info, name, howto_table_ext[r_type].name,
5082 r_addend, input_bfd, input_section, r_addr)))
5094 /* Handle a link order which is supposed to generate a reloc. */
5097 aout_link_reloc_link_order (finfo, o, p)
5098 struct aout_final_link_info *finfo;
5100 struct bfd_link_order *p;
5102 struct bfd_link_order_reloc *pr;
5105 reloc_howto_type *howto;
5106 file_ptr *reloff_ptr;
5107 struct reloc_std_external srel;
5108 struct reloc_ext_external erel;
5113 if (p->type == bfd_section_reloc_link_order)
5116 if (bfd_is_abs_section (pr->u.section))
5117 r_index = N_ABS | N_EXT;
5120 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5121 r_index = pr->u.section->target_index;
5126 struct aout_link_hash_entry *h;
5128 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5130 h = aout_link_hash_lookup (aout_hash_table (finfo->info),
5131 pr->u.name, false, false, true);
5132 if (h != (struct aout_link_hash_entry *) NULL
5137 /* We decided to strip this symbol, but it turns out that we
5138 can't. Note that we lose the other and desc information
5139 here. I don't think that will ever matter for a global
5143 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5149 if (! ((*finfo->info->callbacks->unattached_reloc)
5150 (finfo->info, pr->u.name, (bfd *) NULL,
5151 (asection *) NULL, (bfd_vma) 0)))
5157 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5160 bfd_set_error (bfd_error_bad_value);
5164 if (o == obj_textsec (finfo->output_bfd))
5165 reloff_ptr = &finfo->treloff;
5166 else if (o == obj_datasec (finfo->output_bfd))
5167 reloff_ptr = &finfo->dreloff;
5171 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5174 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5184 r_pcrel = howto->pc_relative;
5185 r_baserel = (howto->type & 8) != 0;
5186 r_jmptable = (howto->type & 16) != 0;
5187 r_relative = (howto->type & 32) != 0;
5188 r_length = howto->size;
5190 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5191 if (finfo->output_bfd->xvec->header_byteorder_big_p)
5193 srel.r_index[0] = r_index >> 16;
5194 srel.r_index[1] = r_index >> 8;
5195 srel.r_index[2] = r_index;
5197 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5198 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5199 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5200 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5201 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5202 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5206 srel.r_index[2] = r_index >> 16;
5207 srel.r_index[1] = r_index >> 8;
5208 srel.r_index[0] = r_index;
5210 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5211 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5212 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5213 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5214 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5215 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5219 rel_ptr = (PTR) &srel;
5221 /* We have to write the addend into the object file, since
5222 standard a.out relocs are in place. It would be more
5223 reliable if we had the current contents of the file here,
5224 rather than assuming zeroes, but we can't read the file since
5225 it was opened using bfd_openw. */
5226 if (pr->addend != 0)
5229 bfd_reloc_status_type r;
5233 size = bfd_get_reloc_size (howto);
5234 buf = (bfd_byte *) bfd_zmalloc (size);
5235 if (buf == (bfd_byte *) NULL)
5237 r = MY_relocate_contents (howto, finfo->output_bfd,
5244 case bfd_reloc_outofrange:
5246 case bfd_reloc_overflow:
5247 if (! ((*finfo->info->callbacks->reloc_overflow)
5249 (p->type == bfd_section_reloc_link_order
5250 ? bfd_section_name (finfo->output_bfd,
5253 howto->name, pr->addend, (bfd *) NULL,
5254 (asection *) NULL, (bfd_vma) 0)))
5261 ok = bfd_set_section_contents (finfo->output_bfd, o,
5263 (file_ptr) p->offset,
5272 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5274 if (finfo->output_bfd->xvec->header_byteorder_big_p)
5276 erel.r_index[0] = r_index >> 16;
5277 erel.r_index[1] = r_index >> 8;
5278 erel.r_index[2] = r_index;
5280 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5281 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5285 erel.r_index[2] = r_index >> 16;
5286 erel.r_index[1] = r_index >> 8;
5287 erel.r_index[0] = r_index;
5289 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5290 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5293 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5295 rel_ptr = (PTR) &erel;
5298 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5299 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5300 obj_reloc_entry_size (finfo->output_bfd),
5302 != obj_reloc_entry_size (finfo->output_bfd)))
5305 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5307 /* Assert that the relocs have not run into the symbols, and that n
5308 the text relocs have not run into the data relocs. */
5309 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5310 && (reloff_ptr != &finfo->treloff
5312 <= obj_datasec (finfo->output_bfd)->rel_filepos)));