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[binutils.git] / bfd / aoutx.h
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1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
3 2001, 2002, 2003
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 SECTION
25 a.out backends
27 DESCRIPTION
29 BFD supports a number of different flavours of a.out format,
30 though the major differences are only the sizes of the
31 structures on disk, and the shape of the relocation
32 information.
34 The support is split into a basic support file @file{aoutx.h}
35 and other files which derive functions from the base. One
36 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
37 adds to the basic a.out functions support for sun3, sun4, 386
38 and 29k a.out files, to create a target jump vector for a
39 specific target.
41 This information is further split out into more specific files
42 for each machine, including @file{sunos.c} for sun3 and sun4,
43 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
44 demonstration of a 64 bit a.out format.
46 The base file @file{aoutx.h} defines general mechanisms for
47 reading and writing records to and from disk and various
48 other methods which BFD requires. It is included by
49 @file{aout32.c} and @file{aout64.c} to form the names
50 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
52 As an example, this is what goes on to make the back end for a
53 sun4, from @file{aout32.c}:
55 | #define ARCH_SIZE 32
56 | #include "aoutx.h"
58 Which exports names:
60 | ...
61 | aout_32_canonicalize_reloc
62 | aout_32_find_nearest_line
63 | aout_32_get_lineno
64 | aout_32_get_reloc_upper_bound
65 | ...
67 from @file{sunos.c}:
69 | #define TARGET_NAME "a.out-sunos-big"
70 | #define VECNAME sunos_big_vec
71 | #include "aoutf1.h"
73 requires all the names from @file{aout32.c}, and produces the jump vector
75 | sunos_big_vec
77 The file @file{host-aout.c} is a special case. It is for a large set
78 of hosts that use ``more or less standard'' a.out files, and
79 for which cross-debugging is not interesting. It uses the
80 standard 32-bit a.out support routines, but determines the
81 file offsets and addresses of the text, data, and BSS
82 sections, the machine architecture and machine type, and the
83 entry point address, in a host-dependent manner. Once these
84 values have been determined, generic code is used to handle
85 the object file.
87 When porting it to run on a new system, you must supply:
89 | HOST_PAGE_SIZE
90 | HOST_SEGMENT_SIZE
91 | HOST_MACHINE_ARCH (optional)
92 | HOST_MACHINE_MACHINE (optional)
93 | HOST_TEXT_START_ADDR
94 | HOST_STACK_END_ADDR
96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
97 values, plus the structures and macros defined in @file{a.out.h} on
98 your host system, will produce a BFD target that will access
99 ordinary a.out files on your host. To configure a new machine
100 to use @file{host-aout.c}, specify:
102 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
103 | TDEPFILES= host-aout.o trad-core.o
105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 to use the
107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
108 configuration is selected. */
110 /* Some assumptions:
111 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
112 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 get set on input.
114 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
115 * Any BFD with both flags clear is OMAGIC.
116 (Just want to make these explicit, so the conditions tested in this
117 file make sense if you're more familiar with a.out than with BFD.) */
119 #define KEEPIT udata.i
121 #include "bfd.h"
122 #include "sysdep.h"
123 #include "safe-ctype.h"
124 #include "bfdlink.h"
126 #include "libaout.h"
127 #include "libbfd.h"
128 #include "aout/aout64.h"
129 #include "aout/stab_gnu.h"
130 #include "aout/ar.h"
132 static bfd_boolean aout_get_external_symbols
133 PARAMS ((bfd *));
134 static bfd_boolean translate_from_native_sym_flags
135 PARAMS ((bfd *, aout_symbol_type *));
136 static bfd_boolean translate_to_native_sym_flags
137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
138 static void adjust_o_magic
139 PARAMS ((bfd *, struct internal_exec *));
140 static void adjust_z_magic
141 PARAMS ((bfd *, struct internal_exec *));
142 static void adjust_n_magic
143 PARAMS ((bfd *, struct internal_exec *));
144 reloc_howto_type * NAME(aout,reloc_type_lookup)
145 PARAMS ((bfd *, bfd_reloc_code_real_type));
148 SUBSECTION
149 Relocations
151 DESCRIPTION
152 The file @file{aoutx.h} provides for both the @emph{standard}
153 and @emph{extended} forms of a.out relocation records.
155 The standard records contain only an
156 address, a symbol index, and a type field. The extended records
157 (used on 29ks and sparcs) also have a full integer for an
158 addend. */
160 #ifndef CTOR_TABLE_RELOC_HOWTO
161 #define CTOR_TABLE_RELOC_IDX 2
162 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
163 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
164 ? howto_table_ext : howto_table_std) \
165 + CTOR_TABLE_RELOC_IDX)
166 #endif
168 #ifndef MY_swap_std_reloc_in
169 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
170 #endif
172 #ifndef MY_swap_ext_reloc_in
173 #define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in)
174 #endif
176 #ifndef MY_swap_std_reloc_out
177 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
178 #endif
180 #ifndef MY_swap_ext_reloc_out
181 #define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out)
182 #endif
184 #ifndef MY_final_link_relocate
185 #define MY_final_link_relocate _bfd_final_link_relocate
186 #endif
188 #ifndef MY_relocate_contents
189 #define MY_relocate_contents _bfd_relocate_contents
190 #endif
192 #define howto_table_ext NAME(aout,ext_howto_table)
193 #define howto_table_std NAME(aout,std_howto_table)
195 reloc_howto_type howto_table_ext[] =
197 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
198 HOWTO(RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", FALSE, 0,0x000000ff, FALSE),
199 HOWTO(RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", FALSE, 0,0x0000ffff, FALSE),
200 HOWTO(RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", FALSE, 0,0xffffffff, FALSE),
201 HOWTO(RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed,0,"DISP8", FALSE, 0,0x000000ff, FALSE),
202 HOWTO(RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed,0,"DISP16", FALSE, 0,0x0000ffff, FALSE),
203 HOWTO(RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed,0,"DISP32", FALSE, 0,0xffffffff, FALSE),
204 HOWTO(RELOC_WDISP30,2, 2, 30, TRUE, 0, complain_overflow_signed,0,"WDISP30", FALSE, 0,0x3fffffff, FALSE),
205 HOWTO(RELOC_WDISP22,2, 2, 22, TRUE, 0, complain_overflow_signed,0,"WDISP22", FALSE, 0,0x003fffff, FALSE),
206 HOWTO(RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"HI22", FALSE, 0,0x003fffff, FALSE),
207 HOWTO(RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"22", FALSE, 0,0x003fffff, FALSE),
208 HOWTO(RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield,0,"13", FALSE, 0,0x00001fff, FALSE),
209 HOWTO(RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont,0,"LO10", FALSE, 0,0x000003ff, FALSE),
210 HOWTO(RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"SFA_BASE", FALSE, 0,0xffffffff, FALSE),
211 HOWTO(RELOC_SFA_OFF13,0,2, 32, FALSE, 0, complain_overflow_bitfield,0,"SFA_OFF13",FALSE, 0,0xffffffff, FALSE),
212 HOWTO(RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont,0,"BASE10", FALSE, 0,0x000003ff, FALSE),
213 HOWTO(RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed,0,"BASE13", FALSE, 0,0x00001fff, FALSE),
214 HOWTO(RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"BASE22", FALSE, 0,0x003fffff, FALSE),
215 HOWTO(RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont,0,"PC10", FALSE, 0,0x000003ff, TRUE),
216 HOWTO(RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed,0,"PC22", FALSE, 0,0x003fffff, TRUE),
217 HOWTO(RELOC_JMP_TBL,2, 2, 30, TRUE, 0, complain_overflow_signed,0,"JMP_TBL", FALSE, 0,0x3fffffff, FALSE),
218 HOWTO(RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"SEGOFF16", FALSE, 0,0x00000000, FALSE),
219 HOWTO(RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GLOB_DAT", FALSE, 0,0x00000000, FALSE),
220 HOWTO(RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_SLOT", FALSE, 0,0x00000000, FALSE),
221 HOWTO(RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
222 HOWTO(0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE", FALSE,0,0x00000000,TRUE),
223 HOWTO(0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE", FALSE,0,0x00000000,TRUE),
224 #define RELOC_SPARC_REV32 RELOC_WDISP19
225 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont,0,"R_SPARC_REV32", FALSE, 0,0xffffffff, FALSE),
228 /* Convert standard reloc records to "arelent" format (incl byte swap). */
230 reloc_howto_type howto_table_std[] =
232 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
233 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
234 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
235 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
236 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
237 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
238 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
239 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
240 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
241 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
242 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
243 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
244 EMPTY_HOWTO (-1),
245 EMPTY_HOWTO (-1),
246 EMPTY_HOWTO (-1),
247 EMPTY_HOWTO (-1),
248 EMPTY_HOWTO (-1),
249 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
250 EMPTY_HOWTO (-1),
251 EMPTY_HOWTO (-1),
252 EMPTY_HOWTO (-1),
253 EMPTY_HOWTO (-1),
254 EMPTY_HOWTO (-1),
255 EMPTY_HOWTO (-1),
256 EMPTY_HOWTO (-1),
257 EMPTY_HOWTO (-1),
258 EMPTY_HOWTO (-1),
259 EMPTY_HOWTO (-1),
260 EMPTY_HOWTO (-1),
261 EMPTY_HOWTO (-1),
262 EMPTY_HOWTO (-1),
263 EMPTY_HOWTO (-1),
264 EMPTY_HOWTO (-1),
265 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
266 EMPTY_HOWTO (-1),
267 EMPTY_HOWTO (-1),
268 EMPTY_HOWTO (-1),
269 EMPTY_HOWTO (-1),
270 EMPTY_HOWTO (-1),
271 EMPTY_HOWTO (-1),
272 EMPTY_HOWTO (-1),
273 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
276 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
278 reloc_howto_type *
279 NAME(aout,reloc_type_lookup) (abfd,code)
280 bfd *abfd;
281 bfd_reloc_code_real_type code;
283 #define EXT(i, j) case i: return &howto_table_ext[j]
284 #define STD(i, j) case i: return &howto_table_std[j]
285 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
287 if (code == BFD_RELOC_CTOR)
288 switch (bfd_get_arch_info (abfd)->bits_per_address)
290 case 32:
291 code = BFD_RELOC_32;
292 break;
293 case 64:
294 code = BFD_RELOC_64;
295 break;
298 if (ext)
299 switch (code)
301 EXT (BFD_RELOC_8, 0);
302 EXT (BFD_RELOC_16, 1);
303 EXT (BFD_RELOC_32, 2);
304 EXT (BFD_RELOC_HI22, 8);
305 EXT (BFD_RELOC_LO10, 11);
306 EXT (BFD_RELOC_32_PCREL_S2, 6);
307 EXT (BFD_RELOC_SPARC_WDISP22, 7);
308 EXT (BFD_RELOC_SPARC13, 10);
309 EXT (BFD_RELOC_SPARC_GOT10, 14);
310 EXT (BFD_RELOC_SPARC_BASE13, 15);
311 EXT (BFD_RELOC_SPARC_GOT13, 15);
312 EXT (BFD_RELOC_SPARC_GOT22, 16);
313 EXT (BFD_RELOC_SPARC_PC10, 17);
314 EXT (BFD_RELOC_SPARC_PC22, 18);
315 EXT (BFD_RELOC_SPARC_WPLT30, 19);
316 EXT (BFD_RELOC_SPARC_REV32, 26);
317 default: return (reloc_howto_type *) NULL;
319 else
320 /* std relocs. */
321 switch (code)
323 STD (BFD_RELOC_8, 0);
324 STD (BFD_RELOC_16, 1);
325 STD (BFD_RELOC_32, 2);
326 STD (BFD_RELOC_8_PCREL, 4);
327 STD (BFD_RELOC_16_PCREL, 5);
328 STD (BFD_RELOC_32_PCREL, 6);
329 STD (BFD_RELOC_16_BASEREL, 9);
330 STD (BFD_RELOC_32_BASEREL, 10);
331 default: return (reloc_howto_type *) NULL;
336 SUBSECTION
337 Internal entry points
339 DESCRIPTION
340 @file{aoutx.h} exports several routines for accessing the
341 contents of an a.out file, which are gathered and exported in
342 turn by various format specific files (eg sunos.c).
347 FUNCTION
348 aout_@var{size}_swap_exec_header_in
350 SYNOPSIS
351 void aout_@var{size}_swap_exec_header_in,
352 (bfd *abfd,
353 struct external_exec *raw_bytes,
354 struct internal_exec *execp);
356 DESCRIPTION
357 Swap the information in an executable header @var{raw_bytes} taken
358 from a raw byte stream memory image into the internal exec header
359 structure @var{execp}.
362 #ifndef NAME_swap_exec_header_in
363 void
364 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
365 bfd *abfd;
366 struct external_exec *raw_bytes;
367 struct internal_exec *execp;
369 struct external_exec *bytes = (struct external_exec *)raw_bytes;
371 /* The internal_exec structure has some fields that are unused in this
372 configuration (IE for i960), so ensure that all such uninitialized
373 fields are zero'd out. There are places where two of these structs
374 are memcmp'd, and thus the contents do matter. */
375 memset ((PTR) execp, 0, sizeof (struct internal_exec));
376 /* Now fill in fields in the execp, from the bytes in the raw data. */
377 execp->a_info = H_GET_32 (abfd, bytes->e_info);
378 execp->a_text = GET_WORD (abfd, bytes->e_text);
379 execp->a_data = GET_WORD (abfd, bytes->e_data);
380 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
381 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
382 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
383 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
384 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
386 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
387 #endif
390 FUNCTION
391 aout_@var{size}_swap_exec_header_out
393 SYNOPSIS
394 void aout_@var{size}_swap_exec_header_out
395 (bfd *abfd,
396 struct internal_exec *execp,
397 struct external_exec *raw_bytes);
399 DESCRIPTION
400 Swap the information in an internal exec header structure
401 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
403 void
404 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
405 bfd *abfd;
406 struct internal_exec *execp;
407 struct external_exec *raw_bytes;
409 struct external_exec *bytes = (struct external_exec *)raw_bytes;
411 /* Now fill in fields in the raw data, from the fields in the exec struct. */
412 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
413 PUT_WORD (abfd, execp->a_text , bytes->e_text);
414 PUT_WORD (abfd, execp->a_data , bytes->e_data);
415 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
416 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
417 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
418 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
419 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
422 /* Make all the section for an a.out file. */
424 bfd_boolean
425 NAME(aout,make_sections) (abfd)
426 bfd *abfd;
428 if (obj_textsec (abfd) == (asection *) NULL
429 && bfd_make_section (abfd, ".text") == (asection *) NULL)
430 return FALSE;
431 if (obj_datasec (abfd) == (asection *) NULL
432 && bfd_make_section (abfd, ".data") == (asection *) NULL)
433 return FALSE;
434 if (obj_bsssec (abfd) == (asection *) NULL
435 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
436 return FALSE;
437 return TRUE;
441 FUNCTION
442 aout_@var{size}_some_aout_object_p
444 SYNOPSIS
445 const bfd_target *aout_@var{size}_some_aout_object_p
446 (bfd *abfd,
447 const bfd_target *(*callback_to_real_object_p) ());
449 DESCRIPTION
450 Some a.out variant thinks that the file open in @var{abfd}
451 checking is an a.out file. Do some more checking, and set up
452 for access if it really is. Call back to the calling
453 environment's "finish up" function just before returning, to
454 handle any last-minute setup.
457 const bfd_target *
458 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
459 bfd *abfd;
460 struct internal_exec *execp;
461 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
463 struct aout_data_struct *rawptr, *oldrawptr;
464 const bfd_target *result;
465 bfd_size_type amt = sizeof (struct aout_data_struct);
467 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
468 if (rawptr == NULL)
469 return 0;
471 oldrawptr = abfd->tdata.aout_data;
472 abfd->tdata.aout_data = rawptr;
474 /* Copy the contents of the old tdata struct.
475 In particular, we want the subformat, since for hpux it was set in
476 hp300hpux.c:swap_exec_header_in and will be used in
477 hp300hpux.c:callback. */
478 if (oldrawptr != NULL)
479 *abfd->tdata.aout_data = *oldrawptr;
481 abfd->tdata.aout_data->a.hdr = &rawptr->e;
482 /* Copy in the internal_exec struct. */
483 *(abfd->tdata.aout_data->a.hdr) = *execp;
484 execp = abfd->tdata.aout_data->a.hdr;
486 /* Set the file flags. */
487 abfd->flags = BFD_NO_FLAGS;
488 if (execp->a_drsize || execp->a_trsize)
489 abfd->flags |= HAS_RELOC;
490 /* Setting of EXEC_P has been deferred to the bottom of this function. */
491 if (execp->a_syms)
492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
493 if (N_DYNAMIC (*execp))
494 abfd->flags |= DYNAMIC;
496 if (N_MAGIC (*execp) == ZMAGIC)
498 abfd->flags |= D_PAGED | WP_TEXT;
499 adata (abfd).magic = z_magic;
501 else if (N_MAGIC (*execp) == QMAGIC)
503 abfd->flags |= D_PAGED | WP_TEXT;
504 adata (abfd).magic = z_magic;
505 adata (abfd).subformat = q_magic_format;
507 else if (N_MAGIC (*execp) == NMAGIC)
509 abfd->flags |= WP_TEXT;
510 adata (abfd).magic = n_magic;
512 else if (N_MAGIC (*execp) == OMAGIC
513 || N_MAGIC (*execp) == BMAGIC)
514 adata (abfd).magic = o_magic;
515 else
517 /* Should have been checked with N_BADMAG before this routine
518 was called. */
519 abort ();
522 bfd_get_start_address (abfd) = execp->a_entry;
524 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
525 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
527 /* The default relocation entry size is that of traditional V7 Unix. */
528 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
530 /* The default symbol entry size is that of traditional Unix. */
531 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
533 #ifdef USE_MMAP
534 bfd_init_window (&obj_aout_sym_window (abfd));
535 bfd_init_window (&obj_aout_string_window (abfd));
536 #endif
537 obj_aout_external_syms (abfd) = NULL;
538 obj_aout_external_strings (abfd) = NULL;
539 obj_aout_sym_hashes (abfd) = NULL;
541 if (! NAME(aout,make_sections) (abfd))
542 goto error_ret;
544 obj_datasec (abfd)->_raw_size = execp->a_data;
545 obj_bsssec (abfd)->_raw_size = execp->a_bss;
547 obj_textsec (abfd)->flags =
548 (execp->a_trsize != 0
549 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
550 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
551 obj_datasec (abfd)->flags =
552 (execp->a_drsize != 0
553 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
554 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
555 obj_bsssec (abfd)->flags = SEC_ALLOC;
557 #ifdef THIS_IS_ONLY_DOCUMENTATION
558 /* The common code can't fill in these things because they depend
559 on either the start address of the text segment, the rounding
560 up of virtual addresses between segments, or the starting file
561 position of the text segment -- all of which varies among different
562 versions of a.out. */
564 /* Call back to the format-dependent code to fill in the rest of the
565 fields and do any further cleanup. Things that should be filled
566 in by the callback: */
568 struct exec *execp = exec_hdr (abfd);
570 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
571 obj_textsec (abfd)->raw_size = N_TXTSIZE (*execp);
572 /* Data and bss are already filled in since they're so standard. */
574 /* The virtual memory addresses of the sections. */
575 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
576 obj_datasec (abfd)->vma = N_DATADDR (*execp);
577 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
579 /* The file offsets of the sections. */
580 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
581 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
583 /* The file offsets of the relocation info. */
584 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
585 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
587 /* The file offsets of the string table and symbol table. */
588 obj_str_filepos (abfd) = N_STROFF (*execp);
589 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
591 /* Determine the architecture and machine type of the object file. */
592 switch (N_MACHTYPE (*exec_hdr (abfd)))
594 default:
595 abfd->obj_arch = bfd_arch_obscure;
596 break;
599 adata (abfd)->page_size = TARGET_PAGE_SIZE;
600 adata (abfd)->segment_size = SEGMENT_SIZE;
601 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
603 return abfd->xvec;
605 /* The architecture is encoded in various ways in various a.out variants,
606 or is not encoded at all in some of them. The relocation size depends
607 on the architecture and the a.out variant. Finally, the return value
608 is the bfd_target vector in use. If an error occurs, return zero and
609 set bfd_error to the appropriate error code.
611 Formats such as b.out, which have additional fields in the a.out
612 header, should cope with them in this callback as well. */
613 #endif /* DOCUMENTATION */
615 result = (*callback_to_real_object_p) (abfd);
617 /* Now that the segment addresses have been worked out, take a better
618 guess at whether the file is executable. If the entry point
619 is within the text segment, assume it is. (This makes files
620 executable even if their entry point address is 0, as long as
621 their text starts at zero.).
623 This test had to be changed to deal with systems where the text segment
624 runs at a different location than the default. The problem is that the
625 entry address can appear to be outside the text segment, thus causing an
626 erroneous conclusion that the file isn't executable.
628 To fix this, we now accept any non-zero entry point as an indication of
629 executability. This will work most of the time, since only the linker
630 sets the entry point, and that is likely to be non-zero for most systems. */
632 if (execp->a_entry != 0
633 || (execp->a_entry >= obj_textsec (abfd)->vma
634 && execp->a_entry < (obj_textsec (abfd)->vma
635 + obj_textsec (abfd)->_raw_size)))
636 abfd->flags |= EXEC_P;
637 #ifdef STAT_FOR_EXEC
638 else
640 struct stat stat_buf;
642 /* The original heuristic doesn't work in some important cases.
643 The a.out file has no information about the text start
644 address. For files (like kernels) linked to non-standard
645 addresses (ld -Ttext nnn) the entry point may not be between
646 the default text start (obj_textsec(abfd)->vma) and
647 (obj_textsec(abfd)->vma) + text size. This is not just a mach
648 issue. Many kernels are loaded at non standard addresses. */
649 if (abfd->iostream != NULL
650 && (abfd->flags & BFD_IN_MEMORY) == 0
651 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
652 && ((stat_buf.st_mode & 0111) != 0))
653 abfd->flags |= EXEC_P;
655 #endif /* STAT_FOR_EXEC */
657 if (result)
659 #if 0 /* These should be set correctly anyways. */
660 abfd->sections = obj_textsec (abfd);
661 obj_textsec (abfd)->next = obj_datasec (abfd);
662 obj_datasec (abfd)->next = obj_bsssec (abfd);
663 #endif
664 return result;
667 error_ret:
668 bfd_release (abfd, rawptr);
669 abfd->tdata.aout_data = oldrawptr;
670 return NULL;
674 FUNCTION
675 aout_@var{size}_mkobject
677 SYNOPSIS
678 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
680 DESCRIPTION
681 Initialize BFD @var{abfd} for use with a.out files.
684 bfd_boolean
685 NAME(aout,mkobject) (abfd)
686 bfd *abfd;
688 struct aout_data_struct *rawptr;
689 bfd_size_type amt = sizeof (struct aout_data_struct);
691 bfd_set_error (bfd_error_system_call);
693 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
694 if (rawptr == NULL)
695 return FALSE;
697 abfd->tdata.aout_data = rawptr;
698 exec_hdr (abfd) = &(rawptr->e);
700 obj_textsec (abfd) = (asection *) NULL;
701 obj_datasec (abfd) = (asection *) NULL;
702 obj_bsssec (abfd) = (asection *) NULL;
704 return TRUE;
708 FUNCTION
709 aout_@var{size}_machine_type
711 SYNOPSIS
712 enum machine_type aout_@var{size}_machine_type
713 (enum bfd_architecture arch,
714 unsigned long machine));
716 DESCRIPTION
717 Keep track of machine architecture and machine type for
718 a.out's. Return the <<machine_type>> for a particular
719 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
720 and machine can't be represented in a.out format.
722 If the architecture is understood, machine type 0 (default)
723 is always understood.
726 enum machine_type
727 NAME(aout,machine_type) (arch, machine, unknown)
728 enum bfd_architecture arch;
729 unsigned long machine;
730 bfd_boolean *unknown;
732 enum machine_type arch_flags;
734 arch_flags = M_UNKNOWN;
735 *unknown = TRUE;
737 switch (arch)
739 case bfd_arch_sparc:
740 if (machine == 0
741 || machine == bfd_mach_sparc
742 || machine == bfd_mach_sparc_sparclite
743 || machine == bfd_mach_sparc_sparclite_le
744 || machine == bfd_mach_sparc_v9)
745 arch_flags = M_SPARC;
746 else if (machine == bfd_mach_sparc_sparclet)
747 arch_flags = M_SPARCLET;
748 break;
750 case bfd_arch_m68k:
751 switch (machine)
753 case 0: arch_flags = M_68010; break;
754 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
755 case bfd_mach_m68010: arch_flags = M_68010; break;
756 case bfd_mach_m68020: arch_flags = M_68020; break;
757 default: arch_flags = M_UNKNOWN; break;
759 break;
761 case bfd_arch_i386:
762 if (machine == 0
763 || machine == bfd_mach_i386_i386
764 || machine == bfd_mach_i386_i386_intel_syntax)
765 arch_flags = M_386;
766 break;
768 case bfd_arch_a29k:
769 if (machine == 0)
770 arch_flags = M_29K;
771 break;
773 case bfd_arch_arm:
774 if (machine == 0)
775 arch_flags = M_ARM;
776 break;
778 case bfd_arch_mips:
779 switch (machine)
781 case 0:
782 case bfd_mach_mips3000:
783 case bfd_mach_mips3900:
784 arch_flags = M_MIPS1;
785 break;
786 case bfd_mach_mips6000:
787 arch_flags = M_MIPS2;
788 break;
789 case bfd_mach_mips4000:
790 case bfd_mach_mips4010:
791 case bfd_mach_mips4100:
792 case bfd_mach_mips4300:
793 case bfd_mach_mips4400:
794 case bfd_mach_mips4600:
795 case bfd_mach_mips4650:
796 case bfd_mach_mips8000:
797 case bfd_mach_mips10000:
798 case bfd_mach_mips12000:
799 case bfd_mach_mips16:
800 case bfd_mach_mipsisa32:
801 case bfd_mach_mipsisa32r2:
802 case bfd_mach_mips5:
803 case bfd_mach_mipsisa64:
804 case bfd_mach_mipsisa64r2:
805 case bfd_mach_mips_sb1:
806 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
807 arch_flags = M_MIPS2;
808 break;
809 default:
810 arch_flags = M_UNKNOWN;
811 break;
813 break;
815 case bfd_arch_ns32k:
816 switch (machine)
818 case 0: arch_flags = M_NS32532; break;
819 case 32032: arch_flags = M_NS32032; break;
820 case 32532: arch_flags = M_NS32532; break;
821 default: arch_flags = M_UNKNOWN; break;
823 break;
825 case bfd_arch_vax:
826 *unknown = FALSE;
827 break;
829 case bfd_arch_cris:
830 if (machine == 0 || machine == 255)
831 arch_flags = M_CRIS;
832 break;
834 default:
835 arch_flags = M_UNKNOWN;
838 if (arch_flags != M_UNKNOWN)
839 *unknown = FALSE;
841 return arch_flags;
845 FUNCTION
846 aout_@var{size}_set_arch_mach
848 SYNOPSIS
849 bfd_boolean aout_@var{size}_set_arch_mach,
850 (bfd *,
851 enum bfd_architecture arch,
852 unsigned long machine));
854 DESCRIPTION
855 Set the architecture and the machine of the BFD @var{abfd} to the
856 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
857 can support the architecture required.
860 bfd_boolean
861 NAME(aout,set_arch_mach) (abfd, arch, machine)
862 bfd *abfd;
863 enum bfd_architecture arch;
864 unsigned long machine;
866 if (! bfd_default_set_arch_mach (abfd, arch, machine))
867 return FALSE;
869 if (arch != bfd_arch_unknown)
871 bfd_boolean unknown;
873 NAME(aout,machine_type) (arch, machine, &unknown);
874 if (unknown)
875 return FALSE;
878 /* Determine the size of a relocation entry. */
879 switch (arch)
881 case bfd_arch_sparc:
882 case bfd_arch_a29k:
883 case bfd_arch_mips:
884 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
885 break;
886 default:
887 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
888 break;
891 return (*aout_backend_info (abfd)->set_sizes) (abfd);
894 static void
895 adjust_o_magic (abfd, execp)
896 bfd *abfd;
897 struct internal_exec *execp;
899 file_ptr pos = adata (abfd).exec_bytes_size;
900 bfd_vma vma = 0;
901 int pad = 0;
903 /* Text. */
904 obj_textsec (abfd)->filepos = pos;
905 if (!obj_textsec (abfd)->user_set_vma)
906 obj_textsec (abfd)->vma = vma;
907 else
908 vma = obj_textsec (abfd)->vma;
910 pos += obj_textsec (abfd)->_raw_size;
911 vma += obj_textsec (abfd)->_raw_size;
913 /* Data. */
914 if (!obj_datasec (abfd)->user_set_vma)
916 #if 0 /* ?? Does alignment in the file image really matter? */
917 pad = align_power (vma, obj_datasec (abfd)->alignment_power) - vma;
918 #endif
919 obj_textsec (abfd)->_raw_size += pad;
920 pos += pad;
921 vma += pad;
922 obj_datasec (abfd)->vma = vma;
924 else
925 vma = obj_datasec (abfd)->vma;
926 obj_datasec (abfd)->filepos = pos;
927 pos += obj_datasec (abfd)->_raw_size;
928 vma += obj_datasec (abfd)->_raw_size;
930 /* BSS. */
931 if (!obj_bsssec (abfd)->user_set_vma)
933 #if 0
934 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
935 #endif
936 obj_datasec (abfd)->_raw_size += pad;
937 pos += pad;
938 vma += pad;
939 obj_bsssec (abfd)->vma = vma;
941 else
943 /* The VMA of the .bss section is set by the VMA of the
944 .data section plus the size of the .data section. We may
945 need to add padding bytes to make this true. */
946 pad = obj_bsssec (abfd)->vma - vma;
947 if (pad > 0)
949 obj_datasec (abfd)->_raw_size += pad;
950 pos += pad;
953 obj_bsssec (abfd)->filepos = pos;
955 /* Fix up the exec header. */
956 execp->a_text = obj_textsec (abfd)->_raw_size;
957 execp->a_data = obj_datasec (abfd)->_raw_size;
958 execp->a_bss = obj_bsssec (abfd)->_raw_size;
959 N_SET_MAGIC (*execp, OMAGIC);
962 static void
963 adjust_z_magic (abfd, execp)
964 bfd *abfd;
965 struct internal_exec *execp;
967 bfd_size_type data_pad, text_pad;
968 file_ptr text_end;
969 const struct aout_backend_data *abdp;
970 int ztih; /* Nonzero if text includes exec header. */
972 abdp = aout_backend_info (abfd);
974 /* Text. */
975 ztih = (abdp != NULL
976 && (abdp->text_includes_header
977 || obj_aout_subformat (abfd) == q_magic_format));
978 obj_textsec (abfd)->filepos = (ztih
979 ? adata (abfd).exec_bytes_size
980 : adata (abfd).zmagic_disk_block_size);
981 if (! obj_textsec (abfd)->user_set_vma)
983 /* ?? Do we really need to check for relocs here? */
984 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
986 : (ztih
987 ? (abdp->default_text_vma
988 + adata (abfd).exec_bytes_size)
989 : abdp->default_text_vma));
990 text_pad = 0;
992 else
994 /* The .text section is being loaded at an unusual address. We
995 may need to pad it such that the .data section starts at a page
996 boundary. */
997 if (ztih)
998 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
999 & (adata (abfd).page_size - 1));
1000 else
1001 text_pad = ((- obj_textsec (abfd)->vma)
1002 & (adata (abfd).page_size - 1));
1005 /* Find start of data. */
1006 if (ztih)
1008 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
1009 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1011 else
1013 /* Note that if page_size == zmagic_disk_block_size, then
1014 filepos == page_size, and this case is the same as the ztih
1015 case. */
1016 text_end = obj_textsec (abfd)->_raw_size;
1017 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1018 text_end += obj_textsec (abfd)->filepos;
1020 obj_textsec (abfd)->_raw_size += text_pad;
1021 text_end += text_pad;
1023 /* Data. */
1024 if (!obj_datasec (abfd)->user_set_vma)
1026 bfd_vma vma;
1027 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->_raw_size;
1028 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1030 if (abdp && abdp->zmagic_mapped_contiguous)
1032 asection * text = obj_textsec (abfd);
1033 asection * data = obj_datasec (abfd);
1035 text_pad = data->vma - (text->vma + text->_raw_size);
1036 /* Only pad the text section if the data
1037 section is going to be placed after it. */
1038 if (text_pad > 0)
1039 text->_raw_size += text_pad;
1041 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1042 + obj_textsec (abfd)->_raw_size);
1044 /* Fix up exec header while we're at it. */
1045 execp->a_text = obj_textsec (abfd)->_raw_size;
1046 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1047 execp->a_text += adata (abfd).exec_bytes_size;
1048 if (obj_aout_subformat (abfd) == q_magic_format)
1049 N_SET_MAGIC (*execp, QMAGIC);
1050 else
1051 N_SET_MAGIC (*execp, ZMAGIC);
1053 /* Spec says data section should be rounded up to page boundary. */
1054 obj_datasec (abfd)->_raw_size
1055 = align_power (obj_datasec (abfd)->_raw_size,
1056 obj_bsssec (abfd)->alignment_power);
1057 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->_raw_size,
1058 adata (abfd).page_size);
1059 data_pad = execp->a_data - obj_datasec (abfd)->_raw_size;
1061 /* BSS. */
1062 if (!obj_bsssec (abfd)->user_set_vma)
1063 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1064 + obj_datasec (abfd)->_raw_size);
1065 /* If the BSS immediately follows the data section and extra space
1066 in the page is left after the data section, fudge data
1067 in the header so that the bss section looks smaller by that
1068 amount. We'll start the bss section there, and lie to the OS.
1069 (Note that a linker script, as well as the above assignment,
1070 could have explicitly set the BSS vma to immediately follow
1071 the data section.) */
1072 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1073 == obj_datasec (abfd)->vma + obj_datasec (abfd)->_raw_size)
1074 execp->a_bss = (data_pad > obj_bsssec (abfd)->_raw_size
1075 ? 0 : obj_bsssec (abfd)->_raw_size - data_pad);
1076 else
1077 execp->a_bss = obj_bsssec (abfd)->_raw_size;
1080 static void
1081 adjust_n_magic (abfd, execp)
1082 bfd *abfd;
1083 struct internal_exec *execp;
1085 file_ptr pos = adata (abfd).exec_bytes_size;
1086 bfd_vma vma = 0;
1087 int pad;
1089 /* Text. */
1090 obj_textsec (abfd)->filepos = pos;
1091 if (!obj_textsec (abfd)->user_set_vma)
1092 obj_textsec (abfd)->vma = vma;
1093 else
1094 vma = obj_textsec (abfd)->vma;
1095 pos += obj_textsec (abfd)->_raw_size;
1096 vma += obj_textsec (abfd)->_raw_size;
1098 /* Data. */
1099 obj_datasec (abfd)->filepos = pos;
1100 if (!obj_datasec (abfd)->user_set_vma)
1101 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1102 vma = obj_datasec (abfd)->vma;
1104 /* Since BSS follows data immediately, see if it needs alignment. */
1105 vma += obj_datasec (abfd)->_raw_size;
1106 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1107 obj_datasec (abfd)->_raw_size += pad;
1108 pos += obj_datasec (abfd)->_raw_size;
1110 /* BSS. */
1111 if (!obj_bsssec (abfd)->user_set_vma)
1112 obj_bsssec (abfd)->vma = vma;
1113 else
1114 vma = obj_bsssec (abfd)->vma;
1116 /* Fix up exec header. */
1117 execp->a_text = obj_textsec (abfd)->_raw_size;
1118 execp->a_data = obj_datasec (abfd)->_raw_size;
1119 execp->a_bss = obj_bsssec (abfd)->_raw_size;
1120 N_SET_MAGIC (*execp, NMAGIC);
1123 bfd_boolean
1124 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1125 bfd *abfd;
1126 bfd_size_type *text_size;
1127 file_ptr *text_end ATTRIBUTE_UNUSED;
1129 struct internal_exec *execp = exec_hdr (abfd);
1131 if (! NAME(aout,make_sections) (abfd))
1132 return FALSE;
1134 if (adata (abfd).magic != undecided_magic)
1135 return TRUE;
1137 obj_textsec (abfd)->_raw_size =
1138 align_power (obj_textsec (abfd)->_raw_size,
1139 obj_textsec (abfd)->alignment_power);
1141 *text_size = obj_textsec (abfd)->_raw_size;
1142 /* Rule (heuristic) for when to pad to a new page. Note that there
1143 are (at least) two ways demand-paged (ZMAGIC) files have been
1144 handled. Most Berkeley-based systems start the text segment at
1145 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1146 segment right after the exec header; the latter is counted in the
1147 text segment size, and is paged in by the kernel with the rest of
1148 the text. */
1150 /* This perhaps isn't the right way to do this, but made it simpler for me
1151 to understand enough to implement it. Better would probably be to go
1152 right from BFD flags to alignment/positioning characteristics. But the
1153 old code was sloppy enough about handling the flags, and had enough
1154 other magic, that it was a little hard for me to understand. I think
1155 I understand it better now, but I haven't time to do the cleanup this
1156 minute. */
1158 if (abfd->flags & D_PAGED)
1159 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1160 adata (abfd).magic = z_magic;
1161 else if (abfd->flags & WP_TEXT)
1162 adata (abfd).magic = n_magic;
1163 else
1164 adata (abfd).magic = o_magic;
1166 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1167 #if __GNUC__ >= 2
1168 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1169 ({ char *str;
1170 switch (adata (abfd).magic)
1172 case n_magic: str = "NMAGIC"; break;
1173 case o_magic: str = "OMAGIC"; break;
1174 case z_magic: str = "ZMAGIC"; break;
1175 default: abort ();
1177 str;
1179 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size,
1180 obj_textsec (abfd)->alignment_power,
1181 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size,
1182 obj_datasec (abfd)->alignment_power,
1183 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size,
1184 obj_bsssec (abfd)->alignment_power);
1185 #endif
1186 #endif
1188 switch (adata (abfd).magic)
1190 case o_magic:
1191 adjust_o_magic (abfd, execp);
1192 break;
1193 case z_magic:
1194 adjust_z_magic (abfd, execp);
1195 break;
1196 case n_magic:
1197 adjust_n_magic (abfd, execp);
1198 break;
1199 default:
1200 abort ();
1203 #ifdef BFD_AOUT_DEBUG
1204 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1205 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size,
1206 obj_textsec (abfd)->filepos,
1207 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size,
1208 obj_datasec (abfd)->filepos,
1209 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size);
1210 #endif
1212 return TRUE;
1216 FUNCTION
1217 aout_@var{size}_new_section_hook
1219 SYNOPSIS
1220 bfd_boolean aout_@var{size}_new_section_hook,
1221 (bfd *abfd,
1222 asection *newsect));
1224 DESCRIPTION
1225 Called by the BFD in response to a @code{bfd_make_section}
1226 request.
1228 bfd_boolean
1229 NAME(aout,new_section_hook) (abfd, newsect)
1230 bfd *abfd;
1231 asection *newsect;
1233 /* Align to double at least. */
1234 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1236 if (bfd_get_format (abfd) == bfd_object)
1238 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1240 obj_textsec (abfd)= newsect;
1241 newsect->target_index = N_TEXT;
1242 return TRUE;
1245 if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1247 obj_datasec (abfd) = newsect;
1248 newsect->target_index = N_DATA;
1249 return TRUE;
1252 if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1254 obj_bsssec (abfd) = newsect;
1255 newsect->target_index = N_BSS;
1256 return TRUE;
1260 /* We allow more than three sections internally. */
1261 return TRUE;
1264 bfd_boolean
1265 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1266 bfd *abfd;
1267 sec_ptr section;
1268 const PTR location;
1269 file_ptr offset;
1270 bfd_size_type count;
1272 file_ptr text_end;
1273 bfd_size_type text_size;
1275 if (! abfd->output_has_begun)
1277 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1278 return FALSE;
1281 if (section == obj_bsssec (abfd))
1283 bfd_set_error (bfd_error_no_contents);
1284 return FALSE;
1287 if (section != obj_textsec (abfd)
1288 && section != obj_datasec (abfd))
1290 if (aout_section_merge_with_text_p (abfd, section))
1291 section->filepos = obj_textsec (abfd)->filepos +
1292 (section->vma - obj_textsec (abfd)->vma);
1293 else
1295 (*_bfd_error_handler)
1296 (_("%s: can not represent section `%s' in a.out object file format"),
1297 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1298 bfd_set_error (bfd_error_nonrepresentable_section);
1299 return FALSE;
1303 if (count != 0)
1305 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1306 || bfd_bwrite (location, count, abfd) != count)
1307 return FALSE;
1310 return TRUE;
1313 /* Read the external symbols from an a.out file. */
1315 static bfd_boolean
1316 aout_get_external_symbols (abfd)
1317 bfd *abfd;
1319 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1321 bfd_size_type count;
1322 struct external_nlist *syms;
1323 bfd_size_type amt;
1325 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1327 #ifdef USE_MMAP
1328 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1329 exec_hdr (abfd)->a_syms,
1330 &obj_aout_sym_window (abfd), TRUE))
1331 return FALSE;
1332 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1333 #else
1334 /* We allocate using malloc to make the values easy to free
1335 later on. If we put them on the objalloc it might not be
1336 possible to free them. */
1337 syms = ((struct external_nlist *)
1338 bfd_malloc (count * EXTERNAL_NLIST_SIZE));
1339 if (syms == (struct external_nlist *) NULL && count != 0)
1340 return FALSE;
1342 amt = exec_hdr (abfd)->a_syms;
1343 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1344 || bfd_bread (syms, amt, abfd) != amt)
1346 free (syms);
1347 return FALSE;
1349 #endif
1351 obj_aout_external_syms (abfd) = syms;
1352 obj_aout_external_sym_count (abfd) = count;
1355 if (obj_aout_external_strings (abfd) == NULL
1356 && exec_hdr (abfd)->a_syms != 0)
1358 unsigned char string_chars[BYTES_IN_WORD];
1359 bfd_size_type stringsize;
1360 char *strings;
1361 bfd_size_type amt = BYTES_IN_WORD;
1363 /* Get the size of the strings. */
1364 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1365 || bfd_bread ((PTR) string_chars, amt, abfd) != amt)
1366 return FALSE;
1367 stringsize = GET_WORD (abfd, string_chars);
1369 #ifdef USE_MMAP
1370 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1371 &obj_aout_string_window (abfd), TRUE))
1372 return FALSE;
1373 strings = (char *) obj_aout_string_window (abfd).data;
1374 #else
1375 strings = (char *) bfd_malloc (stringsize + 1);
1376 if (strings == NULL)
1377 return FALSE;
1379 /* Skip space for the string count in the buffer for convenience
1380 when using indexes. */
1381 amt = stringsize - BYTES_IN_WORD;
1382 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1384 free (strings);
1385 return FALSE;
1387 #endif
1389 /* Ensure that a zero index yields an empty string. */
1390 strings[0] = '\0';
1392 strings[stringsize - 1] = 0;
1394 obj_aout_external_strings (abfd) = strings;
1395 obj_aout_external_string_size (abfd) = stringsize;
1398 return TRUE;
1401 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1402 and symbol->value fields of CACHE_PTR will be set from the a.out
1403 nlist structure. This function is responsible for setting
1404 symbol->flags and symbol->section, and adjusting symbol->value. */
1406 static bfd_boolean
1407 translate_from_native_sym_flags (abfd, cache_ptr)
1408 bfd *abfd;
1409 aout_symbol_type *cache_ptr;
1411 flagword visible;
1413 if ((cache_ptr->type & N_STAB) != 0
1414 || cache_ptr->type == N_FN)
1416 asection *sec;
1418 /* This is a debugging symbol. */
1419 cache_ptr->symbol.flags = BSF_DEBUGGING;
1421 /* Work out the symbol section. */
1422 switch (cache_ptr->type & N_TYPE)
1424 case N_TEXT:
1425 case N_FN:
1426 sec = obj_textsec (abfd);
1427 break;
1428 case N_DATA:
1429 sec = obj_datasec (abfd);
1430 break;
1431 case N_BSS:
1432 sec = obj_bsssec (abfd);
1433 break;
1434 default:
1435 case N_ABS:
1436 sec = bfd_abs_section_ptr;
1437 break;
1440 cache_ptr->symbol.section = sec;
1441 cache_ptr->symbol.value -= sec->vma;
1443 return TRUE;
1446 /* Get the default visibility. This does not apply to all types, so
1447 we just hold it in a local variable to use if wanted. */
1448 if ((cache_ptr->type & N_EXT) == 0)
1449 visible = BSF_LOCAL;
1450 else
1451 visible = BSF_GLOBAL;
1453 switch (cache_ptr->type)
1455 default:
1456 case N_ABS: case N_ABS | N_EXT:
1457 cache_ptr->symbol.section = bfd_abs_section_ptr;
1458 cache_ptr->symbol.flags = visible;
1459 break;
1461 case N_UNDF | N_EXT:
1462 if (cache_ptr->symbol.value != 0)
1464 /* This is a common symbol. */
1465 cache_ptr->symbol.flags = BSF_GLOBAL;
1466 cache_ptr->symbol.section = bfd_com_section_ptr;
1468 else
1470 cache_ptr->symbol.flags = 0;
1471 cache_ptr->symbol.section = bfd_und_section_ptr;
1473 break;
1475 case N_TEXT: case N_TEXT | N_EXT:
1476 cache_ptr->symbol.section = obj_textsec (abfd);
1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1478 cache_ptr->symbol.flags = visible;
1479 break;
1481 /* N_SETV symbols used to represent set vectors placed in the
1482 data section. They are no longer generated. Theoretically,
1483 it was possible to extract the entries and combine them with
1484 new ones, although I don't know if that was ever actually
1485 done. Unless that feature is restored, treat them as data
1486 symbols. */
1487 case N_SETV: case N_SETV | N_EXT:
1488 case N_DATA: case N_DATA | N_EXT:
1489 cache_ptr->symbol.section = obj_datasec (abfd);
1490 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1491 cache_ptr->symbol.flags = visible;
1492 break;
1494 case N_BSS: case N_BSS | N_EXT:
1495 cache_ptr->symbol.section = obj_bsssec (abfd);
1496 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1497 cache_ptr->symbol.flags = visible;
1498 break;
1500 case N_SETA: case N_SETA | N_EXT:
1501 case N_SETT: case N_SETT | N_EXT:
1502 case N_SETD: case N_SETD | N_EXT:
1503 case N_SETB: case N_SETB | N_EXT:
1505 /* This code is no longer needed. It used to be used to make
1506 the linker handle set symbols, but they are now handled in
1507 the add_symbols routine instead. */
1508 #if 0
1509 asection *section;
1510 arelent_chain *reloc;
1511 asection *into_section;
1512 bfd_size_type amt;
1514 /* This is a set symbol. The name of the symbol is the name
1515 of the set (e.g., __CTOR_LIST__). The value of the symbol
1516 is the value to add to the set. We create a section with
1517 the same name as the symbol, and add a reloc to insert the
1518 appropriate value into the section.
1520 This action is actually obsolete; it used to make the
1521 linker do the right thing, but the linker no longer uses
1522 this function. */
1524 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1525 if (section == NULL)
1527 char *copy;
1529 amt = strlen (cache_ptr->symbol.name) + 1;
1530 copy = bfd_alloc (abfd, amt);
1531 if (copy == NULL)
1532 return FALSE;
1534 strcpy (copy, cache_ptr->symbol.name);
1535 section = bfd_make_section (abfd, copy);
1536 if (section == NULL)
1537 return FALSE;
1540 amt = sizeof (arelent_chain);
1541 reloc = (arelent_chain *) bfd_alloc (abfd, amt);
1542 if (reloc == NULL)
1543 return FALSE;
1545 /* Build a relocation entry for the constructor. */
1546 switch (cache_ptr->type & N_TYPE)
1548 case N_SETA:
1549 into_section = bfd_abs_section_ptr;
1550 cache_ptr->type = N_ABS;
1551 break;
1552 case N_SETT:
1553 into_section = obj_textsec (abfd);
1554 cache_ptr->type = N_TEXT;
1555 break;
1556 case N_SETD:
1557 into_section = obj_datasec (abfd);
1558 cache_ptr->type = N_DATA;
1559 break;
1560 case N_SETB:
1561 into_section = obj_bsssec (abfd);
1562 cache_ptr->type = N_BSS;
1563 break;
1566 /* Build a relocation pointing into the constructor section
1567 pointing at the symbol in the set vector specified. */
1568 reloc->relent.addend = cache_ptr->symbol.value;
1569 cache_ptr->symbol.section = into_section;
1570 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1572 /* We modify the symbol to belong to a section depending upon
1573 the name of the symbol, and add to the size of the section
1574 to contain a pointer to the symbol. Build a reloc entry to
1575 relocate to this symbol attached to this section. */
1576 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1578 section->reloc_count++;
1579 section->alignment_power = 2;
1581 reloc->next = section->constructor_chain;
1582 section->constructor_chain = reloc;
1583 reloc->relent.address = section->_raw_size;
1584 section->_raw_size += BYTES_IN_WORD;
1586 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO (abfd);
1588 #endif /* 0 */
1590 switch (cache_ptr->type & N_TYPE)
1592 case N_SETA:
1593 cache_ptr->symbol.section = bfd_abs_section_ptr;
1594 break;
1595 case N_SETT:
1596 cache_ptr->symbol.section = obj_textsec (abfd);
1597 break;
1598 case N_SETD:
1599 cache_ptr->symbol.section = obj_datasec (abfd);
1600 break;
1601 case N_SETB:
1602 cache_ptr->symbol.section = obj_bsssec (abfd);
1603 break;
1606 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1608 break;
1610 case N_WARNING:
1611 /* This symbol is the text of a warning message. The next
1612 symbol is the symbol to associate the warning with. If a
1613 reference is made to that symbol, a warning is issued. */
1614 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1615 cache_ptr->symbol.section = bfd_abs_section_ptr;
1616 break;
1618 case N_INDR: case N_INDR | N_EXT:
1619 /* An indirect symbol. This consists of two symbols in a row.
1620 The first symbol is the name of the indirection. The second
1621 symbol is the name of the target. A reference to the first
1622 symbol becomes a reference to the second. */
1623 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1624 cache_ptr->symbol.section = bfd_ind_section_ptr;
1625 break;
1627 case N_WEAKU:
1628 cache_ptr->symbol.section = bfd_und_section_ptr;
1629 cache_ptr->symbol.flags = BSF_WEAK;
1630 break;
1632 case N_WEAKA:
1633 cache_ptr->symbol.section = bfd_abs_section_ptr;
1634 cache_ptr->symbol.flags = BSF_WEAK;
1635 break;
1637 case N_WEAKT:
1638 cache_ptr->symbol.section = obj_textsec (abfd);
1639 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1640 cache_ptr->symbol.flags = BSF_WEAK;
1641 break;
1643 case N_WEAKD:
1644 cache_ptr->symbol.section = obj_datasec (abfd);
1645 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1646 cache_ptr->symbol.flags = BSF_WEAK;
1647 break;
1649 case N_WEAKB:
1650 cache_ptr->symbol.section = obj_bsssec (abfd);
1651 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1652 cache_ptr->symbol.flags = BSF_WEAK;
1653 break;
1656 return TRUE;
1659 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1661 static bfd_boolean
1662 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1663 bfd *abfd;
1664 asymbol *cache_ptr;
1665 struct external_nlist *sym_pointer;
1667 bfd_vma value = cache_ptr->value;
1668 asection *sec;
1669 bfd_vma off;
1671 /* Mask out any existing type bits in case copying from one section
1672 to another. */
1673 sym_pointer->e_type[0] &= ~N_TYPE;
1675 sec = bfd_get_section (cache_ptr);
1676 off = 0;
1678 if (sec == NULL)
1680 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1681 file. */
1682 (*_bfd_error_handler)
1683 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1684 bfd_get_filename (abfd),
1685 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1686 bfd_set_error (bfd_error_nonrepresentable_section);
1687 return FALSE;
1690 if (sec->output_section != NULL)
1692 off = sec->output_offset;
1693 sec = sec->output_section;
1696 if (bfd_is_abs_section (sec))
1697 sym_pointer->e_type[0] |= N_ABS;
1698 else if (sec == obj_textsec (abfd))
1699 sym_pointer->e_type[0] |= N_TEXT;
1700 else if (sec == obj_datasec (abfd))
1701 sym_pointer->e_type[0] |= N_DATA;
1702 else if (sec == obj_bsssec (abfd))
1703 sym_pointer->e_type[0] |= N_BSS;
1704 else if (bfd_is_und_section (sec))
1705 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1706 else if (bfd_is_ind_section (sec))
1707 sym_pointer->e_type[0] = N_INDR;
1708 else if (bfd_is_com_section (sec))
1709 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1710 else
1712 if (aout_section_merge_with_text_p (abfd, sec))
1713 sym_pointer->e_type[0] |= N_TEXT;
1714 else
1716 (*_bfd_error_handler)
1717 (_("%s: can not represent section `%s' in a.out object file format"),
1718 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1719 bfd_set_error (bfd_error_nonrepresentable_section);
1720 return FALSE;
1724 /* Turn the symbol from section relative to absolute again. */
1725 value += sec->vma + off;
1727 if ((cache_ptr->flags & BSF_WARNING) != 0)
1728 sym_pointer->e_type[0] = N_WARNING;
1730 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1731 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1732 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1733 sym_pointer->e_type[0] |= N_EXT;
1734 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1735 sym_pointer->e_type[0] &= ~N_EXT;
1737 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1739 int type = ((aout_symbol_type *) cache_ptr)->type;
1741 switch (type)
1743 case N_ABS: type = N_SETA; break;
1744 case N_TEXT: type = N_SETT; break;
1745 case N_DATA: type = N_SETD; break;
1746 case N_BSS: type = N_SETB; break;
1748 sym_pointer->e_type[0] = type;
1751 if ((cache_ptr->flags & BSF_WEAK) != 0)
1753 int type;
1755 switch (sym_pointer->e_type[0] & N_TYPE)
1757 default:
1758 case N_ABS: type = N_WEAKA; break;
1759 case N_TEXT: type = N_WEAKT; break;
1760 case N_DATA: type = N_WEAKD; break;
1761 case N_BSS: type = N_WEAKB; break;
1762 case N_UNDF: type = N_WEAKU; break;
1764 sym_pointer->e_type[0] = type;
1767 PUT_WORD (abfd, value, sym_pointer->e_value);
1769 return TRUE;
1772 /* Native-level interface to symbols. */
1774 asymbol *
1775 NAME(aout,make_empty_symbol) (abfd)
1776 bfd *abfd;
1778 bfd_size_type amt = sizeof (aout_symbol_type);
1779 aout_symbol_type *new = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1780 if (!new)
1781 return NULL;
1782 new->symbol.the_bfd = abfd;
1784 return &new->symbol;
1787 /* Translate a set of internal symbols into external symbols. */
1789 bfd_boolean
1790 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1791 bfd *abfd;
1792 aout_symbol_type *in;
1793 struct external_nlist *ext;
1794 bfd_size_type count;
1795 char *str;
1796 bfd_size_type strsize;
1797 bfd_boolean dynamic;
1799 struct external_nlist *ext_end;
1801 ext_end = ext + count;
1802 for (; ext < ext_end; ext++, in++)
1804 bfd_vma x;
1806 x = GET_WORD (abfd, ext->e_strx);
1807 in->symbol.the_bfd = abfd;
1809 /* For the normal symbols, the zero index points at the number
1810 of bytes in the string table but is to be interpreted as the
1811 null string. For the dynamic symbols, the number of bytes in
1812 the string table is stored in the __DYNAMIC structure and the
1813 zero index points at an actual string. */
1814 if (x == 0 && ! dynamic)
1815 in->symbol.name = "";
1816 else if (x < strsize)
1817 in->symbol.name = str + x;
1818 else
1819 return FALSE;
1821 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1822 in->desc = H_GET_16 (abfd, ext->e_desc);
1823 in->other = H_GET_8 (abfd, ext->e_other);
1824 in->type = H_GET_8 (abfd, ext->e_type);
1825 in->symbol.udata.p = NULL;
1827 if (! translate_from_native_sym_flags (abfd, in))
1828 return FALSE;
1830 if (dynamic)
1831 in->symbol.flags |= BSF_DYNAMIC;
1834 return TRUE;
1837 /* We read the symbols into a buffer, which is discarded when this
1838 function exits. We read the strings into a buffer large enough to
1839 hold them all plus all the cached symbol entries. */
1841 bfd_boolean
1842 NAME(aout,slurp_symbol_table) (abfd)
1843 bfd *abfd;
1845 struct external_nlist *old_external_syms;
1846 aout_symbol_type *cached;
1847 bfd_size_type cached_size;
1849 /* If there's no work to be done, don't do any. */
1850 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1851 return TRUE;
1853 old_external_syms = obj_aout_external_syms (abfd);
1855 if (! aout_get_external_symbols (abfd))
1856 return FALSE;
1858 cached_size = obj_aout_external_sym_count (abfd);
1859 cached_size *= sizeof (aout_symbol_type);
1860 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1861 if (cached == NULL && cached_size != 0)
1862 return FALSE;
1864 /* Convert from external symbol information to internal. */
1865 if (! (NAME(aout,translate_symbol_table)
1866 (abfd, cached,
1867 obj_aout_external_syms (abfd),
1868 obj_aout_external_sym_count (abfd),
1869 obj_aout_external_strings (abfd),
1870 obj_aout_external_string_size (abfd),
1871 FALSE)))
1873 free (cached);
1874 return FALSE;
1877 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1879 obj_aout_symbols (abfd) = cached;
1881 /* It is very likely that anybody who calls this function will not
1882 want the external symbol information, so if it was allocated
1883 because of our call to aout_get_external_symbols, we free it up
1884 right away to save space. */
1885 if (old_external_syms == (struct external_nlist *) NULL
1886 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1888 #ifdef USE_MMAP
1889 bfd_free_window (&obj_aout_sym_window (abfd));
1890 #else
1891 free (obj_aout_external_syms (abfd));
1892 #endif
1893 obj_aout_external_syms (abfd) = NULL;
1896 return TRUE;
1899 /* We use a hash table when writing out symbols so that we only write
1900 out a particular string once. This helps particularly when the
1901 linker writes out stabs debugging entries, because each different
1902 contributing object file tends to have many duplicate stabs
1903 strings.
1905 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1906 if BFD_TRADITIONAL_FORMAT is set. */
1908 static bfd_size_type add_to_stringtab
1909 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, bfd_boolean));
1910 static bfd_boolean emit_stringtab
1911 PARAMS ((bfd *, struct bfd_strtab_hash *));
1913 /* Get the index of a string in a strtab, adding it if it is not
1914 already present. */
1916 static INLINE bfd_size_type
1917 add_to_stringtab (abfd, tab, str, copy)
1918 bfd *abfd;
1919 struct bfd_strtab_hash *tab;
1920 const char *str;
1921 bfd_boolean copy;
1923 bfd_boolean hash;
1924 bfd_size_type index;
1926 /* An index of 0 always means the empty string. */
1927 if (str == 0 || *str == '\0')
1928 return 0;
1930 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1931 doesn't understand a hashed string table. */
1932 hash = TRUE;
1933 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1934 hash = FALSE;
1936 index = _bfd_stringtab_add (tab, str, hash, copy);
1938 if (index != (bfd_size_type) -1)
1940 /* Add BYTES_IN_WORD to the return value to account for the
1941 space taken up by the string table size. */
1942 index += BYTES_IN_WORD;
1945 return index;
1948 /* Write out a strtab. ABFD is already at the right location in the
1949 file. */
1951 static bfd_boolean
1952 emit_stringtab (abfd, tab)
1953 register bfd *abfd;
1954 struct bfd_strtab_hash *tab;
1956 bfd_byte buffer[BYTES_IN_WORD];
1957 bfd_size_type amt = BYTES_IN_WORD;
1959 /* The string table starts with the size. */
1960 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1961 if (bfd_bwrite ((PTR) buffer, amt, abfd) != amt)
1962 return FALSE;
1964 return _bfd_stringtab_emit (abfd, tab);
1967 bfd_boolean
1968 NAME(aout,write_syms) (abfd)
1969 bfd *abfd;
1971 unsigned int count ;
1972 asymbol **generic = bfd_get_outsymbols (abfd);
1973 struct bfd_strtab_hash *strtab;
1975 strtab = _bfd_stringtab_init ();
1976 if (strtab == NULL)
1977 return FALSE;
1979 for (count = 0; count < bfd_get_symcount (abfd); count++)
1981 asymbol *g = generic[count];
1982 bfd_size_type indx;
1983 struct external_nlist nsp;
1984 bfd_size_type amt;
1986 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1987 if (indx == (bfd_size_type) -1)
1988 goto error_return;
1989 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1991 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1993 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1994 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1995 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1997 else
1999 H_PUT_16 (abfd, 0, nsp.e_desc);
2000 H_PUT_8 (abfd, 0, nsp.e_other);
2001 H_PUT_8 (abfd, 0, nsp.e_type);
2004 if (! translate_to_native_sym_flags (abfd, g, &nsp))
2005 goto error_return;
2007 amt = EXTERNAL_NLIST_SIZE;
2008 if (bfd_bwrite ((PTR) &nsp, amt, abfd) != amt)
2009 goto error_return;
2011 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
2012 here, at the end. */
2013 g->KEEPIT = count;
2016 if (! emit_stringtab (abfd, strtab))
2017 goto error_return;
2019 _bfd_stringtab_free (strtab);
2021 return TRUE;
2023 error_return:
2024 _bfd_stringtab_free (strtab);
2025 return FALSE;
2028 long
2029 NAME(aout,canonicalize_symtab) (abfd, location)
2030 bfd *abfd;
2031 asymbol **location;
2033 unsigned int counter = 0;
2034 aout_symbol_type *symbase;
2036 if (!NAME(aout,slurp_symbol_table) (abfd))
2037 return -1;
2039 for (symbase = obj_aout_symbols (abfd);
2040 counter++ < bfd_get_symcount (abfd);
2042 *(location++) = (asymbol *) (symbase++);
2043 *location++ =0;
2044 return bfd_get_symcount (abfd);
2047 /* Standard reloc stuff. */
2048 /* Output standard relocation information to a file in target byte order. */
2050 extern void NAME(aout,swap_std_reloc_out)
2051 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2053 void
2054 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2055 bfd *abfd;
2056 arelent *g;
2057 struct reloc_std_external *natptr;
2059 int r_index;
2060 asymbol *sym = *(g->sym_ptr_ptr);
2061 int r_extern;
2062 unsigned int r_length;
2063 int r_pcrel;
2064 int r_baserel, r_jmptable, r_relative;
2065 asection *output_section = sym->section->output_section;
2067 PUT_WORD (abfd, g->address, natptr->r_address);
2069 r_length = g->howto->size ; /* Size as a power of two. */
2070 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2071 /* XXX This relies on relocs coming from a.out files. */
2072 r_baserel = (g->howto->type & 8) != 0;
2073 r_jmptable = (g->howto->type & 16) != 0;
2074 r_relative = (g->howto->type & 32) != 0;
2076 #if 0
2077 /* For a standard reloc, the addend is in the object file. */
2078 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2079 #endif
2081 /* Name was clobbered by aout_write_syms to be symbol index. */
2083 /* If this relocation is relative to a symbol then set the
2084 r_index to the symbols index, and the r_extern bit.
2086 Absolute symbols can come in in two ways, either as an offset
2087 from the abs section, or as a symbol which has an abs value.
2088 check for that here. */
2090 if (bfd_is_com_section (output_section)
2091 || bfd_is_abs_section (output_section)
2092 || bfd_is_und_section (output_section))
2094 if (bfd_abs_section_ptr->symbol == sym)
2096 /* Whoops, looked like an abs symbol, but is
2097 really an offset from the abs section. */
2098 r_index = N_ABS;
2099 r_extern = 0;
2101 else
2103 /* Fill in symbol. */
2104 r_extern = 1;
2105 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2108 else
2110 /* Just an ordinary section. */
2111 r_extern = 0;
2112 r_index = output_section->target_index;
2115 /* Now the fun stuff. */
2116 if (bfd_header_big_endian (abfd))
2118 natptr->r_index[0] = r_index >> 16;
2119 natptr->r_index[1] = r_index >> 8;
2120 natptr->r_index[2] = r_index;
2121 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2122 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2123 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2124 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2125 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2126 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2128 else
2130 natptr->r_index[2] = r_index >> 16;
2131 natptr->r_index[1] = r_index >> 8;
2132 natptr->r_index[0] = r_index;
2133 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2134 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2135 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2136 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2137 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2138 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2142 /* Extended stuff. */
2143 /* Output extended relocation information to a file in target byte order. */
2145 extern void NAME(aout,swap_ext_reloc_out)
2146 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2148 void
2149 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2150 bfd *abfd;
2151 arelent *g;
2152 register struct reloc_ext_external *natptr;
2154 int r_index;
2155 int r_extern;
2156 unsigned int r_type;
2157 bfd_vma r_addend;
2158 asymbol *sym = *(g->sym_ptr_ptr);
2159 asection *output_section = sym->section->output_section;
2161 PUT_WORD (abfd, g->address, natptr->r_address);
2163 r_type = (unsigned int) g->howto->type;
2165 r_addend = g->addend;
2166 if ((sym->flags & BSF_SECTION_SYM) != 0)
2167 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2169 /* If this relocation is relative to a symbol then set the
2170 r_index to the symbols index, and the r_extern bit.
2172 Absolute symbols can come in in two ways, either as an offset
2173 from the abs section, or as a symbol which has an abs value.
2174 check for that here. */
2175 if (bfd_is_abs_section (bfd_get_section (sym)))
2177 r_extern = 0;
2178 r_index = N_ABS;
2180 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2182 if (bfd_is_und_section (bfd_get_section (sym))
2183 || (sym->flags & BSF_GLOBAL) != 0)
2184 r_extern = 1;
2185 else
2186 r_extern = 0;
2187 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2189 else
2191 /* Just an ordinary section. */
2192 r_extern = 0;
2193 r_index = output_section->target_index;
2196 /* Now the fun stuff. */
2197 if (bfd_header_big_endian (abfd))
2199 natptr->r_index[0] = r_index >> 16;
2200 natptr->r_index[1] = r_index >> 8;
2201 natptr->r_index[2] = r_index;
2202 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2203 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2205 else
2207 natptr->r_index[2] = r_index >> 16;
2208 natptr->r_index[1] = r_index >> 8;
2209 natptr->r_index[0] = r_index;
2210 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2211 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2214 PUT_WORD (abfd, r_addend, natptr->r_addend);
2217 /* BFD deals internally with all things based from the section they're
2218 in. so, something in 10 bytes into a text section with a base of
2219 50 would have a symbol (.text+10) and know .text vma was 50.
2221 Aout keeps all it's symbols based from zero, so the symbol would
2222 contain 60. This macro subs the base of each section from the value
2223 to give the true offset from the section. */
2225 #define MOVE_ADDRESS(ad) \
2226 if (r_extern) \
2228 /* Undefined symbol. */ \
2229 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2230 cache_ptr->addend = ad; \
2232 else \
2234 /* Defined, section relative. Replace symbol with pointer to \
2235 symbol which points to section. */ \
2236 switch (r_index) \
2238 case N_TEXT: \
2239 case N_TEXT | N_EXT: \
2240 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2241 cache_ptr->addend = ad - su->textsec->vma; \
2242 break; \
2243 case N_DATA: \
2244 case N_DATA | N_EXT: \
2245 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2246 cache_ptr->addend = ad - su->datasec->vma; \
2247 break; \
2248 case N_BSS: \
2249 case N_BSS | N_EXT: \
2250 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2251 cache_ptr->addend = ad - su->bsssec->vma; \
2252 break; \
2253 default: \
2254 case N_ABS: \
2255 case N_ABS | N_EXT: \
2256 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2257 cache_ptr->addend = ad; \
2258 break; \
2262 void
2263 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2264 bfd *abfd;
2265 struct reloc_ext_external *bytes;
2266 arelent *cache_ptr;
2267 asymbol **symbols;
2268 bfd_size_type symcount;
2270 unsigned int r_index;
2271 int r_extern;
2272 unsigned int r_type;
2273 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2275 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2277 /* Now the fun stuff. */
2278 if (bfd_header_big_endian (abfd))
2280 r_index = (((unsigned int) bytes->r_index[0] << 16)
2281 | ((unsigned int) bytes->r_index[1] << 8)
2282 | bytes->r_index[2]);
2283 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2284 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2285 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2287 else
2289 r_index = (((unsigned int) bytes->r_index[2] << 16)
2290 | ((unsigned int) bytes->r_index[1] << 8)
2291 | bytes->r_index[0]);
2292 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2293 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2294 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2297 cache_ptr->howto = howto_table_ext + r_type;
2299 /* Base relative relocs are always against the symbol table,
2300 regardless of the setting of r_extern. r_extern just reflects
2301 whether the symbol the reloc is against is local or global. */
2302 if (r_type == (unsigned int) RELOC_BASE10
2303 || r_type == (unsigned int) RELOC_BASE13
2304 || r_type == (unsigned int) RELOC_BASE22)
2305 r_extern = 1;
2307 if (r_extern && r_index > symcount)
2309 /* We could arrange to return an error, but it might be useful
2310 to see the file even if it is bad. */
2311 r_extern = 0;
2312 r_index = N_ABS;
2315 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2318 void
2319 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2320 bfd *abfd;
2321 struct reloc_std_external *bytes;
2322 arelent *cache_ptr;
2323 asymbol **symbols;
2324 bfd_size_type symcount;
2326 unsigned int r_index;
2327 int r_extern;
2328 unsigned int r_length;
2329 int r_pcrel;
2330 int r_baserel, r_jmptable, r_relative;
2331 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2332 unsigned int howto_idx;
2334 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2336 /* Now the fun stuff. */
2337 if (bfd_header_big_endian (abfd))
2339 r_index = (((unsigned int) bytes->r_index[0] << 16)
2340 | ((unsigned int) bytes->r_index[1] << 8)
2341 | bytes->r_index[2]);
2342 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2343 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2344 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2345 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2346 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2347 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2348 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2350 else
2352 r_index = (((unsigned int) bytes->r_index[2] << 16)
2353 | ((unsigned int) bytes->r_index[1] << 8)
2354 | bytes->r_index[0]);
2355 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2356 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2357 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2358 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2359 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2360 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2361 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2364 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2365 + 16 * r_jmptable + 32 * r_relative);
2366 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2367 cache_ptr->howto = howto_table_std + howto_idx;
2368 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2370 /* Base relative relocs are always against the symbol table,
2371 regardless of the setting of r_extern. r_extern just reflects
2372 whether the symbol the reloc is against is local or global. */
2373 if (r_baserel)
2374 r_extern = 1;
2376 if (r_extern && r_index > symcount)
2378 /* We could arrange to return an error, but it might be useful
2379 to see the file even if it is bad. */
2380 r_extern = 0;
2381 r_index = N_ABS;
2384 MOVE_ADDRESS (0);
2387 /* Read and swap the relocs for a section. */
2389 bfd_boolean
2390 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2391 bfd *abfd;
2392 sec_ptr asect;
2393 asymbol **symbols;
2395 bfd_size_type count;
2396 bfd_size_type reloc_size;
2397 PTR relocs;
2398 arelent *reloc_cache;
2399 size_t each_size;
2400 unsigned int counter = 0;
2401 arelent *cache_ptr;
2402 bfd_size_type amt;
2404 if (asect->relocation)
2405 return TRUE;
2407 if (asect->flags & SEC_CONSTRUCTOR)
2408 return TRUE;
2410 if (asect == obj_datasec (abfd))
2411 reloc_size = exec_hdr (abfd)->a_drsize;
2412 else if (asect == obj_textsec (abfd))
2413 reloc_size = exec_hdr (abfd)->a_trsize;
2414 else if (asect == obj_bsssec (abfd))
2415 reloc_size = 0;
2416 else
2418 bfd_set_error (bfd_error_invalid_operation);
2419 return FALSE;
2422 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2423 return FALSE;
2425 each_size = obj_reloc_entry_size (abfd);
2427 count = reloc_size / each_size;
2429 amt = count * sizeof (arelent);
2430 reloc_cache = (arelent *) bfd_zmalloc (amt);
2431 if (reloc_cache == NULL && count != 0)
2432 return FALSE;
2434 relocs = bfd_malloc (reloc_size);
2435 if (relocs == NULL && reloc_size != 0)
2437 free (reloc_cache);
2438 return FALSE;
2441 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2443 free (relocs);
2444 free (reloc_cache);
2445 return FALSE;
2448 cache_ptr = reloc_cache;
2449 if (each_size == RELOC_EXT_SIZE)
2451 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2453 for (; counter < count; counter++, rptr++, cache_ptr++)
2454 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2455 (bfd_size_type) bfd_get_symcount (abfd));
2457 else
2459 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2461 for (; counter < count; counter++, rptr++, cache_ptr++)
2462 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2463 (bfd_size_type) bfd_get_symcount (abfd));
2466 free (relocs);
2468 asect->relocation = reloc_cache;
2469 asect->reloc_count = cache_ptr - reloc_cache;
2471 return TRUE;
2474 /* Write out a relocation section into an object file. */
2476 bfd_boolean
2477 NAME(aout,squirt_out_relocs) (abfd, section)
2478 bfd *abfd;
2479 asection *section;
2481 arelent **generic;
2482 unsigned char *native, *natptr;
2483 size_t each_size;
2485 unsigned int count = section->reloc_count;
2486 bfd_size_type natsize;
2488 if (count == 0 || section->orelocation == NULL)
2489 return TRUE;
2491 each_size = obj_reloc_entry_size (abfd);
2492 natsize = (bfd_size_type) each_size * count;
2493 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2494 if (!native)
2495 return FALSE;
2497 generic = section->orelocation;
2499 if (each_size == RELOC_EXT_SIZE)
2501 for (natptr = native;
2502 count != 0;
2503 --count, natptr += each_size, ++generic)
2504 MY_swap_ext_reloc_out (abfd, *generic,
2505 (struct reloc_ext_external *) natptr);
2507 else
2509 for (natptr = native;
2510 count != 0;
2511 --count, natptr += each_size, ++generic)
2512 MY_swap_std_reloc_out (abfd, *generic,
2513 (struct reloc_std_external *) natptr);
2516 if (bfd_bwrite ((PTR) native, natsize, abfd) != natsize)
2518 bfd_release (abfd, native);
2519 return FALSE;
2521 bfd_release (abfd, native);
2523 return TRUE;
2526 /* This is stupid. This function should be a boolean predicate. */
2528 long
2529 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2530 bfd *abfd;
2531 sec_ptr section;
2532 arelent **relptr;
2533 asymbol **symbols;
2535 arelent *tblptr = section->relocation;
2536 unsigned int count;
2538 if (section == obj_bsssec (abfd))
2540 *relptr = NULL;
2541 return 0;
2544 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
2545 return -1;
2547 if (section->flags & SEC_CONSTRUCTOR)
2549 arelent_chain *chain = section->constructor_chain;
2550 for (count = 0; count < section->reloc_count; count ++)
2552 *relptr ++ = &chain->relent;
2553 chain = chain->next;
2556 else
2558 tblptr = section->relocation;
2560 for (count = 0; count++ < section->reloc_count; )
2562 *relptr++ = tblptr++;
2565 *relptr = 0;
2567 return section->reloc_count;
2570 long
2571 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2572 bfd *abfd;
2573 sec_ptr asect;
2575 if (bfd_get_format (abfd) != bfd_object)
2577 bfd_set_error (bfd_error_invalid_operation);
2578 return -1;
2581 if (asect->flags & SEC_CONSTRUCTOR)
2582 return (sizeof (arelent *) * (asect->reloc_count+1));
2584 if (asect == obj_datasec (abfd))
2585 return (sizeof (arelent *)
2586 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2587 + 1));
2589 if (asect == obj_textsec (abfd))
2590 return (sizeof (arelent *)
2591 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2592 + 1));
2594 if (asect == obj_bsssec (abfd))
2595 return sizeof (arelent *);
2597 if (asect == obj_bsssec (abfd))
2598 return 0;
2600 bfd_set_error (bfd_error_invalid_operation);
2601 return -1;
2604 long
2605 NAME(aout,get_symtab_upper_bound) (abfd)
2606 bfd *abfd;
2608 if (!NAME(aout,slurp_symbol_table) (abfd))
2609 return -1;
2611 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2614 alent *
2615 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2616 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2617 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
2619 return (alent *)NULL;
2622 void
2623 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2624 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2625 asymbol *symbol;
2626 symbol_info *ret;
2628 bfd_symbol_info (symbol, ret);
2630 if (ret->type == '?')
2632 int type_code = aout_symbol (symbol)->type & 0xff;
2633 const char *stab_name = bfd_get_stab_name (type_code);
2634 static char buf[10];
2636 if (stab_name == NULL)
2638 sprintf (buf, "(%d)", type_code);
2639 stab_name = buf;
2641 ret->type = '-';
2642 ret->stab_type = type_code;
2643 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2644 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2645 ret->stab_name = stab_name;
2649 void
2650 NAME(aout,print_symbol) (abfd, afile, symbol, how)
2651 bfd *abfd;
2652 PTR afile;
2653 asymbol *symbol;
2654 bfd_print_symbol_type how;
2656 FILE *file = (FILE *)afile;
2658 switch (how)
2660 case bfd_print_symbol_name:
2661 if (symbol->name)
2662 fprintf (file,"%s", symbol->name);
2663 break;
2664 case bfd_print_symbol_more:
2665 fprintf (file,"%4x %2x %2x",
2666 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2667 (unsigned) (aout_symbol (symbol)->other & 0xff),
2668 (unsigned) (aout_symbol (symbol)->type));
2669 break;
2670 case bfd_print_symbol_all:
2672 const char *section_name = symbol->section->name;
2674 bfd_print_symbol_vandf (abfd, (PTR)file, symbol);
2676 fprintf (file," %-5s %04x %02x %02x",
2677 section_name,
2678 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2679 (unsigned) (aout_symbol (symbol)->other & 0xff),
2680 (unsigned) (aout_symbol (symbol)->type & 0xff));
2681 if (symbol->name)
2682 fprintf (file," %s", symbol->name);
2684 break;
2688 /* If we don't have to allocate more than 1MB to hold the generic
2689 symbols, we use the generic minisymbol methord: it's faster, since
2690 it only translates the symbols once, not multiple times. */
2691 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2693 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2694 symbols. The minisymbol_to_symbol function translates these into
2695 BFD asymbol structures. */
2697 long
2698 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2699 bfd *abfd;
2700 bfd_boolean dynamic;
2701 PTR *minisymsp;
2702 unsigned int *sizep;
2704 if (dynamic)
2706 /* We could handle the dynamic symbols here as well, but it's
2707 easier to hand them off. */
2708 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2711 if (! aout_get_external_symbols (abfd))
2712 return -1;
2714 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2715 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2717 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2719 /* By passing the external symbols back from this routine, we are
2720 giving up control over the memory block. Clear
2721 obj_aout_external_syms, so that we do not try to free it
2722 ourselves. */
2723 obj_aout_external_syms (abfd) = NULL;
2725 *sizep = EXTERNAL_NLIST_SIZE;
2726 return obj_aout_external_sym_count (abfd);
2729 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2730 unmodified a.out symbol. The SYM argument is a structure returned
2731 by bfd_make_empty_symbol, which we fill in here. */
2733 asymbol *
2734 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2735 bfd *abfd;
2736 bfd_boolean dynamic;
2737 const PTR minisym;
2738 asymbol *sym;
2740 if (dynamic
2741 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2742 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2744 memset (sym, 0, sizeof (aout_symbol_type));
2746 /* We call translate_symbol_table to translate a single symbol. */
2747 if (! (NAME(aout,translate_symbol_table)
2748 (abfd,
2749 (aout_symbol_type *) sym,
2750 (struct external_nlist *) minisym,
2751 (bfd_size_type) 1,
2752 obj_aout_external_strings (abfd),
2753 obj_aout_external_string_size (abfd),
2754 FALSE)))
2755 return NULL;
2757 return sym;
2760 /* Provided a BFD, a section and an offset into the section, calculate
2761 and return the name of the source file and the line nearest to the
2762 wanted location. */
2764 bfd_boolean
2765 NAME(aout,find_nearest_line)
2766 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2767 bfd *abfd;
2768 asection *section;
2769 asymbol **symbols;
2770 bfd_vma offset;
2771 const char **filename_ptr;
2772 const char **functionname_ptr;
2773 unsigned int *line_ptr;
2775 /* Run down the file looking for the filename, function and linenumber. */
2776 asymbol **p;
2777 const char *directory_name = NULL;
2778 const char *main_file_name = NULL;
2779 const char *current_file_name = NULL;
2780 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2781 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2782 bfd_vma low_line_vma = 0;
2783 bfd_vma low_func_vma = 0;
2784 asymbol *func = 0;
2785 bfd_size_type filelen, funclen;
2786 char *buf;
2788 *filename_ptr = abfd->filename;
2789 *functionname_ptr = 0;
2790 *line_ptr = 0;
2792 if (symbols != (asymbol **)NULL)
2794 for (p = symbols; *p; p++)
2796 aout_symbol_type *q = (aout_symbol_type *) (*p);
2797 next:
2798 switch (q->type)
2800 case N_TEXT:
2801 /* If this looks like a file name symbol, and it comes after
2802 the line number we have found so far, but before the
2803 offset, then we have probably not found the right line
2804 number. */
2805 if (q->symbol.value <= offset
2806 && ((q->symbol.value > low_line_vma
2807 && (line_file_name != NULL
2808 || *line_ptr != 0))
2809 || (q->symbol.value > low_func_vma
2810 && func != NULL)))
2812 const char *symname;
2814 symname = q->symbol.name;
2815 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2817 if (q->symbol.value > low_line_vma)
2819 *line_ptr = 0;
2820 line_file_name = NULL;
2822 if (q->symbol.value > low_func_vma)
2823 func = NULL;
2826 break;
2828 case N_SO:
2829 /* If this symbol is less than the offset, but greater than
2830 the line number we have found so far, then we have not
2831 found the right line number. */
2832 if (q->symbol.value <= offset)
2834 if (q->symbol.value > low_line_vma)
2836 *line_ptr = 0;
2837 line_file_name = NULL;
2839 if (q->symbol.value > low_func_vma)
2840 func = NULL;
2843 main_file_name = current_file_name = q->symbol.name;
2844 /* Look ahead to next symbol to check if that too is an N_SO. */
2845 p++;
2846 if (*p == NULL)
2847 break;
2848 q = (aout_symbol_type *) (*p);
2849 if (q->type != (int)N_SO)
2850 goto next;
2852 /* Found a second N_SO First is directory; second is filename. */
2853 directory_name = current_file_name;
2854 main_file_name = current_file_name = q->symbol.name;
2855 if (obj_textsec (abfd) != section)
2856 goto done;
2857 break;
2858 case N_SOL:
2859 current_file_name = q->symbol.name;
2860 break;
2862 case N_SLINE:
2864 case N_DSLINE:
2865 case N_BSLINE:
2866 /* We'll keep this if it resolves nearer than the one we have
2867 already. */
2868 if (q->symbol.value >= low_line_vma
2869 && q->symbol.value <= offset)
2871 *line_ptr = q->desc;
2872 low_line_vma = q->symbol.value;
2873 line_file_name = current_file_name;
2874 line_directory_name = directory_name;
2876 break;
2877 case N_FUN:
2879 /* We'll keep this if it is nearer than the one we have already. */
2880 if (q->symbol.value >= low_func_vma &&
2881 q->symbol.value <= offset)
2883 low_func_vma = q->symbol.value;
2884 func = (asymbol *)q;
2886 else if (q->symbol.value > offset)
2887 goto done;
2889 break;
2894 done:
2895 if (*line_ptr != 0)
2897 main_file_name = line_file_name;
2898 directory_name = line_directory_name;
2901 if (main_file_name == NULL
2902 || IS_ABSOLUTE_PATH (main_file_name)
2903 || directory_name == NULL)
2904 filelen = 0;
2905 else
2906 filelen = strlen (directory_name) + strlen (main_file_name);
2908 if (func == NULL)
2909 funclen = 0;
2910 else
2911 funclen = strlen (bfd_asymbol_name (func));
2913 if (adata (abfd).line_buf != NULL)
2914 free (adata (abfd).line_buf);
2916 if (filelen + funclen == 0)
2917 adata (abfd).line_buf = buf = NULL;
2918 else
2920 buf = (char *) bfd_malloc (filelen + funclen + 3);
2921 adata (abfd).line_buf = buf;
2922 if (buf == NULL)
2923 return FALSE;
2926 if (main_file_name != NULL)
2928 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2929 *filename_ptr = main_file_name;
2930 else
2932 sprintf (buf, "%s%s", directory_name, main_file_name);
2933 *filename_ptr = buf;
2934 buf += filelen + 1;
2938 if (func)
2940 const char *function = func->name;
2941 char *colon;
2943 /* The caller expects a symbol name. We actually have a
2944 function name, without the leading underscore. Put the
2945 underscore back in, so that the caller gets a symbol name. */
2946 if (bfd_get_symbol_leading_char (abfd) == '\0')
2947 strcpy (buf, function);
2948 else
2950 buf[0] = bfd_get_symbol_leading_char (abfd);
2951 strcpy (buf + 1, function);
2953 /* Have to remove : stuff. */
2954 colon = strchr (buf, ':');
2955 if (colon != NULL)
2956 *colon = '\0';
2957 *functionname_ptr = buf;
2960 return TRUE;
2964 NAME(aout,sizeof_headers) (abfd, execable)
2965 bfd *abfd;
2966 bfd_boolean execable ATTRIBUTE_UNUSED;
2968 return adata (abfd).exec_bytes_size;
2971 /* Free all information we have cached for this BFD. We can always
2972 read it again later if we need it. */
2974 bfd_boolean
2975 NAME(aout,bfd_free_cached_info) (abfd)
2976 bfd *abfd;
2978 asection *o;
2980 if (bfd_get_format (abfd) != bfd_object
2981 || abfd->tdata.aout_data == NULL)
2982 return TRUE;
2984 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2985 BFCI_FREE (obj_aout_symbols (abfd));
2986 #ifdef USE_MMAP
2987 obj_aout_external_syms (abfd) = 0;
2988 bfd_free_window (&obj_aout_sym_window (abfd));
2989 bfd_free_window (&obj_aout_string_window (abfd));
2990 obj_aout_external_strings (abfd) = 0;
2991 #else
2992 BFCI_FREE (obj_aout_external_syms (abfd));
2993 BFCI_FREE (obj_aout_external_strings (abfd));
2994 #endif
2995 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2996 BFCI_FREE (o->relocation);
2997 #undef BFCI_FREE
2999 return TRUE;
3002 /* a.out link code. */
3004 static bfd_boolean aout_link_add_object_symbols
3005 PARAMS ((bfd *, struct bfd_link_info *));
3006 static bfd_boolean aout_link_check_archive_element
3007 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *));
3008 static bfd_boolean aout_link_free_symbols
3009 PARAMS ((bfd *));
3010 static bfd_boolean aout_link_check_ar_symbols
3011 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *pneeded));
3012 static bfd_boolean aout_link_add_symbols
3013 PARAMS ((bfd *, struct bfd_link_info *));
3015 /* Routine to create an entry in an a.out link hash table. */
3017 struct bfd_hash_entry *
3018 NAME(aout,link_hash_newfunc) (entry, table, string)
3019 struct bfd_hash_entry *entry;
3020 struct bfd_hash_table *table;
3021 const char *string;
3023 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
3025 /* Allocate the structure if it has not already been allocated by a
3026 subclass. */
3027 if (ret == (struct aout_link_hash_entry *) NULL)
3028 ret = ((struct aout_link_hash_entry *)
3029 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
3030 if (ret == (struct aout_link_hash_entry *) NULL)
3031 return (struct bfd_hash_entry *) ret;
3033 /* Call the allocation method of the superclass. */
3034 ret = ((struct aout_link_hash_entry *)
3035 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3036 table, string));
3037 if (ret)
3039 /* Set local fields. */
3040 ret->written = FALSE;
3041 ret->indx = -1;
3044 return (struct bfd_hash_entry *) ret;
3047 /* Initialize an a.out link hash table. */
3049 bfd_boolean
3050 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
3051 struct aout_link_hash_table *table;
3052 bfd *abfd;
3053 struct bfd_hash_entry *(*newfunc)
3054 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
3055 const char *));
3057 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
3060 /* Create an a.out link hash table. */
3062 struct bfd_link_hash_table *
3063 NAME(aout,link_hash_table_create) (abfd)
3064 bfd *abfd;
3066 struct aout_link_hash_table *ret;
3067 bfd_size_type amt = sizeof (struct aout_link_hash_table);
3069 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
3070 if (ret == NULL)
3071 return (struct bfd_link_hash_table *) NULL;
3073 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3074 NAME(aout,link_hash_newfunc)))
3076 free (ret);
3077 return (struct bfd_link_hash_table *) NULL;
3079 return &ret->root;
3082 /* Given an a.out BFD, add symbols to the global hash table as
3083 appropriate. */
3085 bfd_boolean
3086 NAME(aout,link_add_symbols) (abfd, info)
3087 bfd *abfd;
3088 struct bfd_link_info *info;
3090 switch (bfd_get_format (abfd))
3092 case bfd_object:
3093 return aout_link_add_object_symbols (abfd, info);
3094 case bfd_archive:
3095 return _bfd_generic_link_add_archive_symbols
3096 (abfd, info, aout_link_check_archive_element);
3097 default:
3098 bfd_set_error (bfd_error_wrong_format);
3099 return FALSE;
3103 /* Add symbols from an a.out object file. */
3105 static bfd_boolean
3106 aout_link_add_object_symbols (abfd, info)
3107 bfd *abfd;
3108 struct bfd_link_info *info;
3110 if (! aout_get_external_symbols (abfd))
3111 return FALSE;
3112 if (! aout_link_add_symbols (abfd, info))
3113 return FALSE;
3114 if (! info->keep_memory)
3116 if (! aout_link_free_symbols (abfd))
3117 return FALSE;
3119 return TRUE;
3122 /* Check a single archive element to see if we need to include it in
3123 the link. *PNEEDED is set according to whether this element is
3124 needed in the link or not. This is called from
3125 _bfd_generic_link_add_archive_symbols. */
3127 static bfd_boolean
3128 aout_link_check_archive_element (abfd, info, pneeded)
3129 bfd *abfd;
3130 struct bfd_link_info *info;
3131 bfd_boolean *pneeded;
3133 if (! aout_get_external_symbols (abfd))
3134 return FALSE;
3136 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3137 return FALSE;
3139 if (*pneeded)
3141 if (! aout_link_add_symbols (abfd, info))
3142 return FALSE;
3145 if (! info->keep_memory || ! *pneeded)
3147 if (! aout_link_free_symbols (abfd))
3148 return FALSE;
3151 return TRUE;
3154 /* Free up the internal symbols read from an a.out file. */
3156 static bfd_boolean
3157 aout_link_free_symbols (abfd)
3158 bfd *abfd;
3160 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3162 #ifdef USE_MMAP
3163 bfd_free_window (&obj_aout_sym_window (abfd));
3164 #else
3165 free ((PTR) obj_aout_external_syms (abfd));
3166 #endif
3167 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3169 if (obj_aout_external_strings (abfd) != (char *) NULL)
3171 #ifdef USE_MMAP
3172 bfd_free_window (&obj_aout_string_window (abfd));
3173 #else
3174 free ((PTR) obj_aout_external_strings (abfd));
3175 #endif
3176 obj_aout_external_strings (abfd) = (char *) NULL;
3178 return TRUE;
3181 /* Look through the internal symbols to see if this object file should
3182 be included in the link. We should include this object file if it
3183 defines any symbols which are currently undefined. If this object
3184 file defines a common symbol, then we may adjust the size of the
3185 known symbol but we do not include the object file in the link
3186 (unless there is some other reason to include it). */
3188 static bfd_boolean
3189 aout_link_check_ar_symbols (abfd, info, pneeded)
3190 bfd *abfd;
3191 struct bfd_link_info *info;
3192 bfd_boolean *pneeded;
3194 register struct external_nlist *p;
3195 struct external_nlist *pend;
3196 char *strings;
3198 *pneeded = FALSE;
3200 /* Look through all the symbols. */
3201 p = obj_aout_external_syms (abfd);
3202 pend = p + obj_aout_external_sym_count (abfd);
3203 strings = obj_aout_external_strings (abfd);
3204 for (; p < pend; p++)
3206 int type = H_GET_8 (abfd, p->e_type);
3207 const char *name;
3208 struct bfd_link_hash_entry *h;
3210 /* Ignore symbols that are not externally visible. This is an
3211 optimization only, as we check the type more thoroughly
3212 below. */
3213 if (((type & N_EXT) == 0
3214 || (type & N_STAB) != 0
3215 || type == N_FN)
3216 && type != N_WEAKA
3217 && type != N_WEAKT
3218 && type != N_WEAKD
3219 && type != N_WEAKB)
3221 if (type == N_WARNING
3222 || type == N_INDR)
3223 ++p;
3224 continue;
3227 name = strings + GET_WORD (abfd, p->e_strx);
3228 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3230 /* We are only interested in symbols that are currently
3231 undefined or common. */
3232 if (h == (struct bfd_link_hash_entry *) NULL
3233 || (h->type != bfd_link_hash_undefined
3234 && h->type != bfd_link_hash_common))
3236 if (type == (N_INDR | N_EXT))
3237 ++p;
3238 continue;
3241 if (type == (N_TEXT | N_EXT)
3242 || type == (N_DATA | N_EXT)
3243 || type == (N_BSS | N_EXT)
3244 || type == (N_ABS | N_EXT)
3245 || type == (N_INDR | N_EXT))
3247 /* This object file defines this symbol. We must link it
3248 in. This is true regardless of whether the current
3249 definition of the symbol is undefined or common.
3251 If the current definition is common, we have a case in
3252 which we have already seen an object file including:
3253 int a;
3254 and this object file from the archive includes:
3255 int a = 5;
3256 In such a case, whether to include this object is target
3257 dependant for backward compatibility.
3259 FIXME: The SunOS 4.1.3 linker will pull in the archive
3260 element if the symbol is defined in the .data section,
3261 but not if it is defined in the .text section. That
3262 seems a bit crazy to me, and it has not been implemented
3263 yet. However, it might be correct. */
3264 if (h->type == bfd_link_hash_common)
3266 int skip = 0;
3268 switch (info->common_skip_ar_aymbols)
3270 case bfd_link_common_skip_text:
3271 skip = (type == (N_TEXT | N_EXT));
3272 break;
3273 case bfd_link_common_skip_data:
3274 skip = (type == (N_DATA | N_EXT));
3275 break;
3276 default:
3277 case bfd_link_common_skip_all:
3278 skip = 1;
3279 break;
3282 if (skip)
3283 continue;
3286 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3287 return FALSE;
3288 *pneeded = TRUE;
3289 return TRUE;
3292 if (type == (N_UNDF | N_EXT))
3294 bfd_vma value;
3296 value = GET_WORD (abfd, p->e_value);
3297 if (value != 0)
3299 /* This symbol is common in the object from the archive
3300 file. */
3301 if (h->type == bfd_link_hash_undefined)
3303 bfd *symbfd;
3304 unsigned int power;
3306 symbfd = h->u.undef.abfd;
3307 if (symbfd == (bfd *) NULL)
3309 /* This symbol was created as undefined from
3310 outside BFD. We assume that we should link
3311 in the object file. This is done for the -u
3312 option in the linker. */
3313 if (! (*info->callbacks->add_archive_element) (info,
3314 abfd,
3315 name))
3316 return FALSE;
3317 *pneeded = TRUE;
3318 return TRUE;
3320 /* Turn the current link symbol into a common
3321 symbol. It is already on the undefs list. */
3322 h->type = bfd_link_hash_common;
3323 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3324 bfd_hash_allocate (&info->hash->table,
3325 sizeof (struct bfd_link_hash_common_entry)));
3326 if (h->u.c.p == NULL)
3327 return FALSE;
3329 h->u.c.size = value;
3331 /* FIXME: This isn't quite right. The maximum
3332 alignment of a common symbol should be set by the
3333 architecture of the output file, not of the input
3334 file. */
3335 power = bfd_log2 (value);
3336 if (power > bfd_get_arch_info (abfd)->section_align_power)
3337 power = bfd_get_arch_info (abfd)->section_align_power;
3338 h->u.c.p->alignment_power = power;
3340 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3341 "COMMON");
3343 else
3345 /* Adjust the size of the common symbol if
3346 necessary. */
3347 if (value > h->u.c.size)
3348 h->u.c.size = value;
3353 if (type == N_WEAKA
3354 || type == N_WEAKT
3355 || type == N_WEAKD
3356 || type == N_WEAKB)
3358 /* This symbol is weak but defined. We must pull it in if
3359 the current link symbol is undefined, but we don't want
3360 it if the current link symbol is common. */
3361 if (h->type == bfd_link_hash_undefined)
3363 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3364 return FALSE;
3365 *pneeded = TRUE;
3366 return TRUE;
3371 /* We do not need this object file. */
3372 return TRUE;
3375 /* Add all symbols from an object file to the hash table. */
3377 static bfd_boolean
3378 aout_link_add_symbols (abfd, info)
3379 bfd *abfd;
3380 struct bfd_link_info *info;
3382 bfd_boolean (*add_one_symbol)
3383 PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
3384 bfd_vma, const char *, bfd_boolean, bfd_boolean,
3385 struct bfd_link_hash_entry **));
3386 struct external_nlist *syms;
3387 bfd_size_type sym_count;
3388 char *strings;
3389 bfd_boolean copy;
3390 struct aout_link_hash_entry **sym_hash;
3391 register struct external_nlist *p;
3392 struct external_nlist *pend;
3393 bfd_size_type amt;
3395 syms = obj_aout_external_syms (abfd);
3396 sym_count = obj_aout_external_sym_count (abfd);
3397 strings = obj_aout_external_strings (abfd);
3398 if (info->keep_memory)
3399 copy = FALSE;
3400 else
3401 copy = TRUE;
3403 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3405 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3406 (abfd, info, &syms, &sym_count, &strings)))
3407 return FALSE;
3410 /* We keep a list of the linker hash table entries that correspond
3411 to particular symbols. We could just look them up in the hash
3412 table, but keeping the list is more efficient. Perhaps this
3413 should be conditional on info->keep_memory. */
3414 amt = sym_count * sizeof (struct aout_link_hash_entry *);
3415 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
3416 if (sym_hash == NULL && sym_count != 0)
3417 return FALSE;
3418 obj_aout_sym_hashes (abfd) = sym_hash;
3420 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3421 if (add_one_symbol == NULL)
3422 add_one_symbol = _bfd_generic_link_add_one_symbol;
3424 p = syms;
3425 pend = p + sym_count;
3426 for (; p < pend; p++, sym_hash++)
3428 int type;
3429 const char *name;
3430 bfd_vma value;
3431 asection *section;
3432 flagword flags;
3433 const char *string;
3435 *sym_hash = NULL;
3437 type = H_GET_8 (abfd, p->e_type);
3439 /* Ignore debugging symbols. */
3440 if ((type & N_STAB) != 0)
3441 continue;
3443 name = strings + GET_WORD (abfd, p->e_strx);
3444 value = GET_WORD (abfd, p->e_value);
3445 flags = BSF_GLOBAL;
3446 string = NULL;
3447 switch (type)
3449 default:
3450 abort ();
3452 case N_UNDF:
3453 case N_ABS:
3454 case N_TEXT:
3455 case N_DATA:
3456 case N_BSS:
3457 case N_FN_SEQ:
3458 case N_COMM:
3459 case N_SETV:
3460 case N_FN:
3461 /* Ignore symbols that are not externally visible. */
3462 continue;
3463 case N_INDR:
3464 /* Ignore local indirect symbol. */
3465 ++p;
3466 ++sym_hash;
3467 continue;
3469 case N_UNDF | N_EXT:
3470 if (value == 0)
3472 section = bfd_und_section_ptr;
3473 flags = 0;
3475 else
3476 section = bfd_com_section_ptr;
3477 break;
3478 case N_ABS | N_EXT:
3479 section = bfd_abs_section_ptr;
3480 break;
3481 case N_TEXT | N_EXT:
3482 section = obj_textsec (abfd);
3483 value -= bfd_get_section_vma (abfd, section);
3484 break;
3485 case N_DATA | N_EXT:
3486 case N_SETV | N_EXT:
3487 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3488 translate_from_native_sym_flags. */
3489 section = obj_datasec (abfd);
3490 value -= bfd_get_section_vma (abfd, section);
3491 break;
3492 case N_BSS | N_EXT:
3493 section = obj_bsssec (abfd);
3494 value -= bfd_get_section_vma (abfd, section);
3495 break;
3496 case N_INDR | N_EXT:
3497 /* An indirect symbol. The next symbol is the symbol
3498 which this one really is. */
3499 BFD_ASSERT (p + 1 < pend);
3500 ++p;
3501 string = strings + GET_WORD (abfd, p->e_strx);
3502 section = bfd_ind_section_ptr;
3503 flags |= BSF_INDIRECT;
3504 break;
3505 case N_COMM | N_EXT:
3506 section = bfd_com_section_ptr;
3507 break;
3508 case N_SETA: case N_SETA | N_EXT:
3509 section = bfd_abs_section_ptr;
3510 flags |= BSF_CONSTRUCTOR;
3511 break;
3512 case N_SETT: case N_SETT | N_EXT:
3513 section = obj_textsec (abfd);
3514 flags |= BSF_CONSTRUCTOR;
3515 value -= bfd_get_section_vma (abfd, section);
3516 break;
3517 case N_SETD: case N_SETD | N_EXT:
3518 section = obj_datasec (abfd);
3519 flags |= BSF_CONSTRUCTOR;
3520 value -= bfd_get_section_vma (abfd, section);
3521 break;
3522 case N_SETB: case N_SETB | N_EXT:
3523 section = obj_bsssec (abfd);
3524 flags |= BSF_CONSTRUCTOR;
3525 value -= bfd_get_section_vma (abfd, section);
3526 break;
3527 case N_WARNING:
3528 /* A warning symbol. The next symbol is the one to warn
3529 about. */
3530 BFD_ASSERT (p + 1 < pend);
3531 ++p;
3532 string = name;
3533 name = strings + GET_WORD (abfd, p->e_strx);
3534 section = bfd_und_section_ptr;
3535 flags |= BSF_WARNING;
3536 break;
3537 case N_WEAKU:
3538 section = bfd_und_section_ptr;
3539 flags = BSF_WEAK;
3540 break;
3541 case N_WEAKA:
3542 section = bfd_abs_section_ptr;
3543 flags = BSF_WEAK;
3544 break;
3545 case N_WEAKT:
3546 section = obj_textsec (abfd);
3547 value -= bfd_get_section_vma (abfd, section);
3548 flags = BSF_WEAK;
3549 break;
3550 case N_WEAKD:
3551 section = obj_datasec (abfd);
3552 value -= bfd_get_section_vma (abfd, section);
3553 flags = BSF_WEAK;
3554 break;
3555 case N_WEAKB:
3556 section = obj_bsssec (abfd);
3557 value -= bfd_get_section_vma (abfd, section);
3558 flags = BSF_WEAK;
3559 break;
3562 if (! ((*add_one_symbol)
3563 (info, abfd, name, flags, section, value, string, copy, FALSE,
3564 (struct bfd_link_hash_entry **) sym_hash)))
3565 return FALSE;
3567 /* Restrict the maximum alignment of a common symbol based on
3568 the architecture, since a.out has no way to represent
3569 alignment requirements of a section in a .o file. FIXME:
3570 This isn't quite right: it should use the architecture of the
3571 output file, not the input files. */
3572 if ((*sym_hash)->root.type == bfd_link_hash_common
3573 && ((*sym_hash)->root.u.c.p->alignment_power >
3574 bfd_get_arch_info (abfd)->section_align_power))
3575 (*sym_hash)->root.u.c.p->alignment_power =
3576 bfd_get_arch_info (abfd)->section_align_power;
3578 /* If this is a set symbol, and we are not building sets, then
3579 it is possible for the hash entry to not have been set. In
3580 such a case, treat the symbol as not globally defined. */
3581 if ((*sym_hash)->root.type == bfd_link_hash_new)
3583 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3584 *sym_hash = NULL;
3587 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3588 ++sym_hash;
3591 return TRUE;
3594 /* A hash table used for header files with N_BINCL entries. */
3596 struct aout_link_includes_table
3598 struct bfd_hash_table root;
3601 /* A linked list of totals that we have found for a particular header
3602 file. */
3604 struct aout_link_includes_totals
3606 struct aout_link_includes_totals *next;
3607 bfd_vma total;
3610 /* An entry in the header file hash table. */
3612 struct aout_link_includes_entry
3614 struct bfd_hash_entry root;
3615 /* List of totals we have found for this file. */
3616 struct aout_link_includes_totals *totals;
3619 /* Look up an entry in an the header file hash table. */
3621 #define aout_link_includes_lookup(table, string, create, copy) \
3622 ((struct aout_link_includes_entry *) \
3623 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3625 /* During the final link step we need to pass around a bunch of
3626 information, so we do it in an instance of this structure. */
3628 struct aout_final_link_info
3630 /* General link information. */
3631 struct bfd_link_info *info;
3632 /* Output bfd. */
3633 bfd *output_bfd;
3634 /* Reloc file positions. */
3635 file_ptr treloff, dreloff;
3636 /* File position of symbols. */
3637 file_ptr symoff;
3638 /* String table. */
3639 struct bfd_strtab_hash *strtab;
3640 /* Header file hash table. */
3641 struct aout_link_includes_table includes;
3642 /* A buffer large enough to hold the contents of any section. */
3643 bfd_byte *contents;
3644 /* A buffer large enough to hold the relocs of any section. */
3645 PTR relocs;
3646 /* A buffer large enough to hold the symbol map of any input BFD. */
3647 int *symbol_map;
3648 /* A buffer large enough to hold output symbols of any input BFD. */
3649 struct external_nlist *output_syms;
3652 static struct bfd_hash_entry *aout_link_includes_newfunc
3653 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3654 static bfd_boolean aout_link_input_bfd
3655 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3656 static bfd_boolean aout_link_write_symbols
3657 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3658 static bfd_boolean aout_link_write_other_symbol
3659 PARAMS ((struct aout_link_hash_entry *, PTR));
3660 static bfd_boolean aout_link_input_section
3661 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3662 asection *input_section, file_ptr *reloff_ptr,
3663 bfd_size_type rel_size));
3664 static bfd_boolean aout_link_input_section_std
3665 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3666 asection *input_section, struct reloc_std_external *,
3667 bfd_size_type rel_size, bfd_byte *contents));
3668 static bfd_boolean aout_link_input_section_ext
3669 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3670 asection *input_section, struct reloc_ext_external *,
3671 bfd_size_type rel_size, bfd_byte *contents));
3672 static INLINE asection *aout_reloc_index_to_section
3673 PARAMS ((bfd *, int));
3674 static bfd_boolean aout_link_reloc_link_order
3675 PARAMS ((struct aout_final_link_info *, asection *,
3676 struct bfd_link_order *));
3678 /* The function to create a new entry in the header file hash table. */
3680 static struct bfd_hash_entry *
3681 aout_link_includes_newfunc (entry, table, string)
3682 struct bfd_hash_entry *entry;
3683 struct bfd_hash_table *table;
3684 const char *string;
3686 struct aout_link_includes_entry *ret =
3687 (struct aout_link_includes_entry *) entry;
3689 /* Allocate the structure if it has not already been allocated by a
3690 subclass. */
3691 if (ret == (struct aout_link_includes_entry *) NULL)
3692 ret = ((struct aout_link_includes_entry *)
3693 bfd_hash_allocate (table,
3694 sizeof (struct aout_link_includes_entry)));
3695 if (ret == (struct aout_link_includes_entry *) NULL)
3696 return (struct bfd_hash_entry *) ret;
3698 /* Call the allocation method of the superclass. */
3699 ret = ((struct aout_link_includes_entry *)
3700 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3701 if (ret)
3703 /* Set local fields. */
3704 ret->totals = NULL;
3707 return (struct bfd_hash_entry *) ret;
3710 /* Do the final link step. This is called on the output BFD. The
3711 INFO structure should point to a list of BFDs linked through the
3712 link_next field which can be used to find each BFD which takes part
3713 in the output. Also, each section in ABFD should point to a list
3714 of bfd_link_order structures which list all the input sections for
3715 the output section. */
3717 bfd_boolean
3718 NAME(aout,final_link) (abfd, info, callback)
3719 bfd *abfd;
3720 struct bfd_link_info *info;
3721 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3723 struct aout_final_link_info aout_info;
3724 bfd_boolean includes_hash_initialized = FALSE;
3725 register bfd *sub;
3726 bfd_size_type trsize, drsize;
3727 bfd_size_type max_contents_size;
3728 bfd_size_type max_relocs_size;
3729 bfd_size_type max_sym_count;
3730 bfd_size_type text_size;
3731 file_ptr text_end;
3732 register struct bfd_link_order *p;
3733 asection *o;
3734 bfd_boolean have_link_order_relocs;
3736 if (info->shared)
3737 abfd->flags |= DYNAMIC;
3739 aout_info.info = info;
3740 aout_info.output_bfd = abfd;
3741 aout_info.contents = NULL;
3742 aout_info.relocs = NULL;
3743 aout_info.symbol_map = NULL;
3744 aout_info.output_syms = NULL;
3746 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3747 aout_link_includes_newfunc,
3748 251))
3749 goto error_return;
3750 includes_hash_initialized = TRUE;
3752 /* Figure out the largest section size. Also, if generating
3753 relocatable output, count the relocs. */
3754 trsize = 0;
3755 drsize = 0;
3756 max_contents_size = 0;
3757 max_relocs_size = 0;
3758 max_sym_count = 0;
3759 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3761 bfd_size_type sz;
3763 if (info->relocatable)
3765 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3767 trsize += exec_hdr (sub)->a_trsize;
3768 drsize += exec_hdr (sub)->a_drsize;
3770 else
3772 /* FIXME: We need to identify the .text and .data sections
3773 and call get_reloc_upper_bound and canonicalize_reloc to
3774 work out the number of relocs needed, and then multiply
3775 by the reloc size. */
3776 (*_bfd_error_handler)
3777 (_("%s: relocatable link from %s to %s not supported"),
3778 bfd_get_filename (abfd),
3779 sub->xvec->name, abfd->xvec->name);
3780 bfd_set_error (bfd_error_invalid_operation);
3781 goto error_return;
3785 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3787 sz = bfd_section_size (sub, obj_textsec (sub));
3788 if (sz > max_contents_size)
3789 max_contents_size = sz;
3790 sz = bfd_section_size (sub, obj_datasec (sub));
3791 if (sz > max_contents_size)
3792 max_contents_size = sz;
3794 sz = exec_hdr (sub)->a_trsize;
3795 if (sz > max_relocs_size)
3796 max_relocs_size = sz;
3797 sz = exec_hdr (sub)->a_drsize;
3798 if (sz > max_relocs_size)
3799 max_relocs_size = sz;
3801 sz = obj_aout_external_sym_count (sub);
3802 if (sz > max_sym_count)
3803 max_sym_count = sz;
3807 if (info->relocatable)
3809 if (obj_textsec (abfd) != (asection *) NULL)
3810 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3811 ->link_order_head)
3812 * obj_reloc_entry_size (abfd));
3813 if (obj_datasec (abfd) != (asection *) NULL)
3814 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3815 ->link_order_head)
3816 * obj_reloc_entry_size (abfd));
3819 exec_hdr (abfd)->a_trsize = trsize;
3820 exec_hdr (abfd)->a_drsize = drsize;
3822 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3824 /* Adjust the section sizes and vmas according to the magic number.
3825 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3826 filepos for each section. */
3827 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3828 goto error_return;
3830 /* The relocation and symbol file positions differ among a.out
3831 targets. We are passed a callback routine from the backend
3832 specific code to handle this.
3833 FIXME: At this point we do not know how much space the symbol
3834 table will require. This will not work for any (nonstandard)
3835 a.out target that needs to know the symbol table size before it
3836 can compute the relocation file positions. This may or may not
3837 be the case for the hp300hpux target, for example. */
3838 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3839 &aout_info.symoff);
3840 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3841 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3842 obj_sym_filepos (abfd) = aout_info.symoff;
3844 /* We keep a count of the symbols as we output them. */
3845 obj_aout_external_sym_count (abfd) = 0;
3847 /* We accumulate the string table as we write out the symbols. */
3848 aout_info.strtab = _bfd_stringtab_init ();
3849 if (aout_info.strtab == NULL)
3850 goto error_return;
3852 /* Allocate buffers to hold section contents and relocs. */
3853 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3854 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3855 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3856 aout_info.output_syms = ((struct external_nlist *)
3857 bfd_malloc ((max_sym_count + 1)
3858 * sizeof (struct external_nlist)));
3859 if ((aout_info.contents == NULL && max_contents_size != 0)
3860 || (aout_info.relocs == NULL && max_relocs_size != 0)
3861 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3862 || aout_info.output_syms == NULL)
3863 goto error_return;
3865 /* If we have a symbol named __DYNAMIC, force it out now. This is
3866 required by SunOS. Doing this here rather than in sunos.c is a
3867 hack, but it's easier than exporting everything which would be
3868 needed. */
3870 struct aout_link_hash_entry *h;
3872 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3873 FALSE, FALSE, FALSE);
3874 if (h != NULL)
3875 aout_link_write_other_symbol (h, &aout_info);
3878 /* The most time efficient way to do the link would be to read all
3879 the input object files into memory and then sort out the
3880 information into the output file. Unfortunately, that will
3881 probably use too much memory. Another method would be to step
3882 through everything that composes the text section and write it
3883 out, and then everything that composes the data section and write
3884 it out, and then write out the relocs, and then write out the
3885 symbols. Unfortunately, that requires reading stuff from each
3886 input file several times, and we will not be able to keep all the
3887 input files open simultaneously, and reopening them will be slow.
3889 What we do is basically process one input file at a time. We do
3890 everything we need to do with an input file once--copy over the
3891 section contents, handle the relocation information, and write
3892 out the symbols--and then we throw away the information we read
3893 from it. This approach requires a lot of lseeks of the output
3894 file, which is unfortunate but still faster than reopening a lot
3895 of files.
3897 We use the output_has_begun field of the input BFDs to see
3898 whether we have already handled it. */
3899 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3900 sub->output_has_begun = FALSE;
3902 /* Mark all sections which are to be included in the link. This
3903 will normally be every section. We need to do this so that we
3904 can identify any sections which the linker has decided to not
3905 include. */
3906 for (o = abfd->sections; o != NULL; o = o->next)
3908 for (p = o->link_order_head; p != NULL; p = p->next)
3909 if (p->type == bfd_indirect_link_order)
3910 p->u.indirect.section->linker_mark = TRUE;
3913 have_link_order_relocs = FALSE;
3914 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3916 for (p = o->link_order_head;
3917 p != (struct bfd_link_order *) NULL;
3918 p = p->next)
3920 if (p->type == bfd_indirect_link_order
3921 && (bfd_get_flavour (p->u.indirect.section->owner)
3922 == bfd_target_aout_flavour))
3924 bfd *input_bfd;
3926 input_bfd = p->u.indirect.section->owner;
3927 if (! input_bfd->output_has_begun)
3929 if (! aout_link_input_bfd (&aout_info, input_bfd))
3930 goto error_return;
3931 input_bfd->output_has_begun = TRUE;
3934 else if (p->type == bfd_section_reloc_link_order
3935 || p->type == bfd_symbol_reloc_link_order)
3937 /* These are handled below. */
3938 have_link_order_relocs = TRUE;
3940 else
3942 if (! _bfd_default_link_order (abfd, info, o, p))
3943 goto error_return;
3948 /* Write out any symbols that we have not already written out. */
3949 aout_link_hash_traverse (aout_hash_table (info),
3950 aout_link_write_other_symbol,
3951 (PTR) &aout_info);
3953 /* Now handle any relocs we were asked to create by the linker.
3954 These did not come from any input file. We must do these after
3955 we have written out all the symbols, so that we know the symbol
3956 indices to use. */
3957 if (have_link_order_relocs)
3959 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3961 for (p = o->link_order_head;
3962 p != (struct bfd_link_order *) NULL;
3963 p = p->next)
3965 if (p->type == bfd_section_reloc_link_order
3966 || p->type == bfd_symbol_reloc_link_order)
3968 if (! aout_link_reloc_link_order (&aout_info, o, p))
3969 goto error_return;
3975 if (aout_info.contents != NULL)
3977 free (aout_info.contents);
3978 aout_info.contents = NULL;
3980 if (aout_info.relocs != NULL)
3982 free (aout_info.relocs);
3983 aout_info.relocs = NULL;
3985 if (aout_info.symbol_map != NULL)
3987 free (aout_info.symbol_map);
3988 aout_info.symbol_map = NULL;
3990 if (aout_info.output_syms != NULL)
3992 free (aout_info.output_syms);
3993 aout_info.output_syms = NULL;
3995 if (includes_hash_initialized)
3997 bfd_hash_table_free (&aout_info.includes.root);
3998 includes_hash_initialized = FALSE;
4001 /* Finish up any dynamic linking we may be doing. */
4002 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
4004 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
4005 goto error_return;
4008 /* Update the header information. */
4009 abfd->symcount = obj_aout_external_sym_count (abfd);
4010 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
4011 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
4012 obj_textsec (abfd)->reloc_count =
4013 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
4014 obj_datasec (abfd)->reloc_count =
4015 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
4017 /* Write out the string table, unless there are no symbols. */
4018 if (abfd->symcount > 0)
4020 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
4021 || ! emit_stringtab (abfd, aout_info.strtab))
4022 goto error_return;
4024 else if (obj_textsec (abfd)->reloc_count == 0
4025 && obj_datasec (abfd)->reloc_count == 0)
4027 bfd_byte b;
4028 file_ptr pos;
4030 b = 0;
4031 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1;
4032 if (bfd_seek (abfd, pos, SEEK_SET) != 0
4033 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
4034 goto error_return;
4037 return TRUE;
4039 error_return:
4040 if (aout_info.contents != NULL)
4041 free (aout_info.contents);
4042 if (aout_info.relocs != NULL)
4043 free (aout_info.relocs);
4044 if (aout_info.symbol_map != NULL)
4045 free (aout_info.symbol_map);
4046 if (aout_info.output_syms != NULL)
4047 free (aout_info.output_syms);
4048 if (includes_hash_initialized)
4049 bfd_hash_table_free (&aout_info.includes.root);
4050 return FALSE;
4053 /* Link an a.out input BFD into the output file. */
4055 static bfd_boolean
4056 aout_link_input_bfd (finfo, input_bfd)
4057 struct aout_final_link_info *finfo;
4058 bfd *input_bfd;
4060 bfd_size_type sym_count;
4062 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
4064 /* If this is a dynamic object, it may need special handling. */
4065 if ((input_bfd->flags & DYNAMIC) != 0
4066 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
4068 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
4069 (finfo->info, input_bfd));
4072 /* Get the symbols. We probably have them already, unless
4073 finfo->info->keep_memory is FALSE. */
4074 if (! aout_get_external_symbols (input_bfd))
4075 return FALSE;
4077 sym_count = obj_aout_external_sym_count (input_bfd);
4079 /* Write out the symbols and get a map of the new indices. The map
4080 is placed into finfo->symbol_map. */
4081 if (! aout_link_write_symbols (finfo, input_bfd))
4082 return FALSE;
4084 /* Relocate and write out the sections. These functions use the
4085 symbol map created by aout_link_write_symbols. The linker_mark
4086 field will be set if these sections are to be included in the
4087 link, which will normally be the case. */
4088 if (obj_textsec (input_bfd)->linker_mark)
4090 if (! aout_link_input_section (finfo, input_bfd,
4091 obj_textsec (input_bfd),
4092 &finfo->treloff,
4093 exec_hdr (input_bfd)->a_trsize))
4094 return FALSE;
4096 if (obj_datasec (input_bfd)->linker_mark)
4098 if (! aout_link_input_section (finfo, input_bfd,
4099 obj_datasec (input_bfd),
4100 &finfo->dreloff,
4101 exec_hdr (input_bfd)->a_drsize))
4102 return FALSE;
4105 /* If we are not keeping memory, we don't need the symbols any
4106 longer. We still need them if we are keeping memory, because the
4107 strings in the hash table point into them. */
4108 if (! finfo->info->keep_memory)
4110 if (! aout_link_free_symbols (input_bfd))
4111 return FALSE;
4114 return TRUE;
4117 /* Adjust and write out the symbols for an a.out file. Set the new
4118 symbol indices into a symbol_map. */
4120 static bfd_boolean
4121 aout_link_write_symbols (finfo, input_bfd)
4122 struct aout_final_link_info *finfo;
4123 bfd *input_bfd;
4125 bfd *output_bfd;
4126 bfd_size_type sym_count;
4127 char *strings;
4128 enum bfd_link_strip strip;
4129 enum bfd_link_discard discard;
4130 struct external_nlist *outsym;
4131 bfd_size_type strtab_index;
4132 register struct external_nlist *sym;
4133 struct external_nlist *sym_end;
4134 struct aout_link_hash_entry **sym_hash;
4135 int *symbol_map;
4136 bfd_boolean pass;
4137 bfd_boolean skip_next;
4139 output_bfd = finfo->output_bfd;
4140 sym_count = obj_aout_external_sym_count (input_bfd);
4141 strings = obj_aout_external_strings (input_bfd);
4142 strip = finfo->info->strip;
4143 discard = finfo->info->discard;
4144 outsym = finfo->output_syms;
4146 /* First write out a symbol for this object file, unless we are
4147 discarding such symbols. */
4148 if (strip != strip_all
4149 && (strip != strip_some
4150 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4151 FALSE, FALSE) != NULL)
4152 && discard != discard_all)
4154 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4155 H_PUT_8 (output_bfd, 0, outsym->e_other);
4156 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4157 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4158 input_bfd->filename, FALSE);
4159 if (strtab_index == (bfd_size_type) -1)
4160 return FALSE;
4161 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4162 PUT_WORD (output_bfd,
4163 (bfd_get_section_vma (output_bfd,
4164 obj_textsec (input_bfd)->output_section)
4165 + obj_textsec (input_bfd)->output_offset),
4166 outsym->e_value);
4167 ++obj_aout_external_sym_count (output_bfd);
4168 ++outsym;
4171 pass = FALSE;
4172 skip_next = FALSE;
4173 sym = obj_aout_external_syms (input_bfd);
4174 sym_end = sym + sym_count;
4175 sym_hash = obj_aout_sym_hashes (input_bfd);
4176 symbol_map = finfo->symbol_map;
4177 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4178 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4180 const char *name;
4181 int type;
4182 struct aout_link_hash_entry *h;
4183 bfd_boolean skip;
4184 asection *symsec;
4185 bfd_vma val = 0;
4186 bfd_boolean copy;
4188 /* We set *symbol_map to 0 above for all symbols. If it has
4189 already been set to -1 for this symbol, it means that we are
4190 discarding it because it appears in a duplicate header file.
4191 See the N_BINCL code below. */
4192 if (*symbol_map == -1)
4193 continue;
4195 /* Initialize *symbol_map to -1, which means that the symbol was
4196 not copied into the output file. We will change it later if
4197 we do copy the symbol over. */
4198 *symbol_map = -1;
4200 type = H_GET_8 (input_bfd, sym->e_type);
4201 name = strings + GET_WORD (input_bfd, sym->e_strx);
4203 h = NULL;
4205 if (pass)
4207 /* Pass this symbol through. It is the target of an
4208 indirect or warning symbol. */
4209 val = GET_WORD (input_bfd, sym->e_value);
4210 pass = FALSE;
4212 else if (skip_next)
4214 /* Skip this symbol, which is the target of an indirect
4215 symbol that we have changed to no longer be an indirect
4216 symbol. */
4217 skip_next = FALSE;
4218 continue;
4220 else
4222 struct aout_link_hash_entry *hresolve;
4224 /* We have saved the hash table entry for this symbol, if
4225 there is one. Note that we could just look it up again
4226 in the hash table, provided we first check that it is an
4227 external symbol. */
4228 h = *sym_hash;
4230 /* Use the name from the hash table, in case the symbol was
4231 wrapped. */
4232 if (h != NULL
4233 && h->root.type != bfd_link_hash_warning)
4234 name = h->root.root.string;
4236 /* If this is an indirect or warning symbol, then change
4237 hresolve to the base symbol. We also change *sym_hash so
4238 that the relocation routines relocate against the real
4239 symbol. */
4240 hresolve = h;
4241 if (h != (struct aout_link_hash_entry *) NULL
4242 && (h->root.type == bfd_link_hash_indirect
4243 || h->root.type == bfd_link_hash_warning))
4245 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4246 while (hresolve->root.type == bfd_link_hash_indirect
4247 || hresolve->root.type == bfd_link_hash_warning)
4248 hresolve = ((struct aout_link_hash_entry *)
4249 hresolve->root.u.i.link);
4250 *sym_hash = hresolve;
4253 /* If the symbol has already been written out, skip it. */
4254 if (h != (struct aout_link_hash_entry *) NULL
4255 && h->written)
4257 if ((type & N_TYPE) == N_INDR
4258 || type == N_WARNING)
4259 skip_next = TRUE;
4260 *symbol_map = h->indx;
4261 continue;
4264 /* See if we are stripping this symbol. */
4265 skip = FALSE;
4266 switch (strip)
4268 case strip_none:
4269 break;
4270 case strip_debugger:
4271 if ((type & N_STAB) != 0)
4272 skip = TRUE;
4273 break;
4274 case strip_some:
4275 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4276 == NULL)
4277 skip = TRUE;
4278 break;
4279 case strip_all:
4280 skip = TRUE;
4281 break;
4283 if (skip)
4285 if (h != (struct aout_link_hash_entry *) NULL)
4286 h->written = TRUE;
4287 continue;
4290 /* Get the value of the symbol. */
4291 if ((type & N_TYPE) == N_TEXT
4292 || type == N_WEAKT)
4293 symsec = obj_textsec (input_bfd);
4294 else if ((type & N_TYPE) == N_DATA
4295 || type == N_WEAKD)
4296 symsec = obj_datasec (input_bfd);
4297 else if ((type & N_TYPE) == N_BSS
4298 || type == N_WEAKB)
4299 symsec = obj_bsssec (input_bfd);
4300 else if ((type & N_TYPE) == N_ABS
4301 || type == N_WEAKA)
4302 symsec = bfd_abs_section_ptr;
4303 else if (((type & N_TYPE) == N_INDR
4304 && (hresolve == (struct aout_link_hash_entry *) NULL
4305 || (hresolve->root.type != bfd_link_hash_defined
4306 && hresolve->root.type != bfd_link_hash_defweak
4307 && hresolve->root.type != bfd_link_hash_common)))
4308 || type == N_WARNING)
4310 /* Pass the next symbol through unchanged. The
4311 condition above for indirect symbols is so that if
4312 the indirect symbol was defined, we output it with
4313 the correct definition so the debugger will
4314 understand it. */
4315 pass = TRUE;
4316 val = GET_WORD (input_bfd, sym->e_value);
4317 symsec = NULL;
4319 else if ((type & N_STAB) != 0)
4321 val = GET_WORD (input_bfd, sym->e_value);
4322 symsec = NULL;
4324 else
4326 /* If we get here with an indirect symbol, it means that
4327 we are outputting it with a real definition. In such
4328 a case we do not want to output the next symbol,
4329 which is the target of the indirection. */
4330 if ((type & N_TYPE) == N_INDR)
4331 skip_next = TRUE;
4333 symsec = NULL;
4335 /* We need to get the value from the hash table. We use
4336 hresolve so that if we have defined an indirect
4337 symbol we output the final definition. */
4338 if (h == (struct aout_link_hash_entry *) NULL)
4340 switch (type & N_TYPE)
4342 case N_SETT:
4343 symsec = obj_textsec (input_bfd);
4344 break;
4345 case N_SETD:
4346 symsec = obj_datasec (input_bfd);
4347 break;
4348 case N_SETB:
4349 symsec = obj_bsssec (input_bfd);
4350 break;
4351 case N_SETA:
4352 symsec = bfd_abs_section_ptr;
4353 break;
4354 default:
4355 val = 0;
4356 break;
4359 else if (hresolve->root.type == bfd_link_hash_defined
4360 || hresolve->root.type == bfd_link_hash_defweak)
4362 asection *input_section;
4363 asection *output_section;
4365 /* This case usually means a common symbol which was
4366 turned into a defined symbol. */
4367 input_section = hresolve->root.u.def.section;
4368 output_section = input_section->output_section;
4369 BFD_ASSERT (bfd_is_abs_section (output_section)
4370 || output_section->owner == output_bfd);
4371 val = (hresolve->root.u.def.value
4372 + bfd_get_section_vma (output_bfd, output_section)
4373 + input_section->output_offset);
4375 /* Get the correct type based on the section. If
4376 this is a constructed set, force it to be
4377 globally visible. */
4378 if (type == N_SETT
4379 || type == N_SETD
4380 || type == N_SETB
4381 || type == N_SETA)
4382 type |= N_EXT;
4384 type &=~ N_TYPE;
4386 if (output_section == obj_textsec (output_bfd))
4387 type |= (hresolve->root.type == bfd_link_hash_defined
4388 ? N_TEXT
4389 : N_WEAKT);
4390 else if (output_section == obj_datasec (output_bfd))
4391 type |= (hresolve->root.type == bfd_link_hash_defined
4392 ? N_DATA
4393 : N_WEAKD);
4394 else if (output_section == obj_bsssec (output_bfd))
4395 type |= (hresolve->root.type == bfd_link_hash_defined
4396 ? N_BSS
4397 : N_WEAKB);
4398 else
4399 type |= (hresolve->root.type == bfd_link_hash_defined
4400 ? N_ABS
4401 : N_WEAKA);
4403 else if (hresolve->root.type == bfd_link_hash_common)
4404 val = hresolve->root.u.c.size;
4405 else if (hresolve->root.type == bfd_link_hash_undefweak)
4407 val = 0;
4408 type = N_WEAKU;
4410 else
4411 val = 0;
4413 if (symsec != (asection *) NULL)
4414 val = (symsec->output_section->vma
4415 + symsec->output_offset
4416 + (GET_WORD (input_bfd, sym->e_value)
4417 - symsec->vma));
4419 /* If this is a global symbol set the written flag, and if
4420 it is a local symbol see if we should discard it. */
4421 if (h != (struct aout_link_hash_entry *) NULL)
4423 h->written = TRUE;
4424 h->indx = obj_aout_external_sym_count (output_bfd);
4426 else if ((type & N_TYPE) != N_SETT
4427 && (type & N_TYPE) != N_SETD
4428 && (type & N_TYPE) != N_SETB
4429 && (type & N_TYPE) != N_SETA)
4431 switch (discard)
4433 case discard_none:
4434 case discard_sec_merge:
4435 break;
4436 case discard_l:
4437 if ((type & N_STAB) == 0
4438 && bfd_is_local_label_name (input_bfd, name))
4439 skip = TRUE;
4440 break;
4441 case discard_all:
4442 skip = TRUE;
4443 break;
4445 if (skip)
4447 pass = FALSE;
4448 continue;
4452 /* An N_BINCL symbol indicates the start of the stabs
4453 entries for a header file. We need to scan ahead to the
4454 next N_EINCL symbol, ignoring nesting, adding up all the
4455 characters in the symbol names, not including the file
4456 numbers in types (the first number after an open
4457 parenthesis). */
4458 if (type == (int) N_BINCL)
4460 struct external_nlist *incl_sym;
4461 int nest;
4462 struct aout_link_includes_entry *incl_entry;
4463 struct aout_link_includes_totals *t;
4465 val = 0;
4466 nest = 0;
4467 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4469 int incl_type;
4471 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
4472 if (incl_type == (int) N_EINCL)
4474 if (nest == 0)
4475 break;
4476 --nest;
4478 else if (incl_type == (int) N_BINCL)
4479 ++nest;
4480 else if (nest == 0)
4482 const char *s;
4484 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4485 for (; *s != '\0'; s++)
4487 val += *s;
4488 if (*s == '(')
4490 /* Skip the file number. */
4491 ++s;
4492 while (ISDIGIT (*s))
4493 ++s;
4494 --s;
4500 /* If we have already included a header file with the
4501 same value, then replace this one with an N_EXCL
4502 symbol. */
4503 copy = (bfd_boolean) (! finfo->info->keep_memory);
4504 incl_entry = aout_link_includes_lookup (&finfo->includes,
4505 name, TRUE, copy);
4506 if (incl_entry == NULL)
4507 return FALSE;
4508 for (t = incl_entry->totals; t != NULL; t = t->next)
4509 if (t->total == val)
4510 break;
4511 if (t == NULL)
4513 /* This is the first time we have seen this header
4514 file with this set of stabs strings. */
4515 t = ((struct aout_link_includes_totals *)
4516 bfd_hash_allocate (&finfo->includes.root,
4517 sizeof *t));
4518 if (t == NULL)
4519 return FALSE;
4520 t->total = val;
4521 t->next = incl_entry->totals;
4522 incl_entry->totals = t;
4524 else
4526 int *incl_map;
4528 /* This is a duplicate header file. We must change
4529 it to be an N_EXCL entry, and mark all the
4530 included symbols to prevent outputting them. */
4531 type = (int) N_EXCL;
4533 nest = 0;
4534 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4535 incl_sym < sym_end;
4536 incl_sym++, incl_map++)
4538 int incl_type;
4540 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
4541 if (incl_type == (int) N_EINCL)
4543 if (nest == 0)
4545 *incl_map = -1;
4546 break;
4548 --nest;
4550 else if (incl_type == (int) N_BINCL)
4551 ++nest;
4552 else if (nest == 0)
4553 *incl_map = -1;
4559 /* Copy this symbol into the list of symbols we are going to
4560 write out. */
4561 H_PUT_8 (output_bfd, type, outsym->e_type);
4562 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
4563 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
4564 copy = FALSE;
4565 if (! finfo->info->keep_memory)
4567 /* name points into a string table which we are going to
4568 free. If there is a hash table entry, use that string.
4569 Otherwise, copy name into memory. */
4570 if (h != (struct aout_link_hash_entry *) NULL)
4571 name = h->root.root.string;
4572 else
4573 copy = TRUE;
4575 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4576 name, copy);
4577 if (strtab_index == (bfd_size_type) -1)
4578 return FALSE;
4579 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4580 PUT_WORD (output_bfd, val, outsym->e_value);
4581 *symbol_map = obj_aout_external_sym_count (output_bfd);
4582 ++obj_aout_external_sym_count (output_bfd);
4583 ++outsym;
4586 /* Write out the output symbols we have just constructed. */
4587 if (outsym > finfo->output_syms)
4589 bfd_size_type outsym_size;
4591 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4592 return FALSE;
4593 outsym_size = outsym - finfo->output_syms;
4594 outsym_size *= EXTERNAL_NLIST_SIZE;
4595 if (bfd_bwrite ((PTR) finfo->output_syms, outsym_size, output_bfd)
4596 != outsym_size)
4597 return FALSE;
4598 finfo->symoff += outsym_size;
4601 return TRUE;
4604 /* Write out a symbol that was not associated with an a.out input
4605 object. */
4607 static bfd_boolean
4608 aout_link_write_other_symbol (h, data)
4609 struct aout_link_hash_entry *h;
4610 PTR data;
4612 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4613 bfd *output_bfd;
4614 int type;
4615 bfd_vma val;
4616 struct external_nlist outsym;
4617 bfd_size_type indx;
4618 bfd_size_type amt;
4620 if (h->root.type == bfd_link_hash_warning)
4622 h = (struct aout_link_hash_entry *) h->root.u.i.link;
4623 if (h->root.type == bfd_link_hash_new)
4624 return TRUE;
4627 output_bfd = finfo->output_bfd;
4629 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4631 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4632 (output_bfd, finfo->info, h)))
4634 /* FIXME: No way to handle errors. */
4635 abort ();
4639 if (h->written)
4640 return TRUE;
4642 h->written = TRUE;
4644 /* An indx of -2 means the symbol must be written. */
4645 if (h->indx != -2
4646 && (finfo->info->strip == strip_all
4647 || (finfo->info->strip == strip_some
4648 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4649 FALSE, FALSE) == NULL)))
4650 return TRUE;
4652 switch (h->root.type)
4654 default:
4655 case bfd_link_hash_warning:
4656 abort ();
4657 /* Avoid variable not initialized warnings. */
4658 return TRUE;
4659 case bfd_link_hash_new:
4660 /* This can happen for set symbols when sets are not being
4661 built. */
4662 return TRUE;
4663 case bfd_link_hash_undefined:
4664 type = N_UNDF | N_EXT;
4665 val = 0;
4666 break;
4667 case bfd_link_hash_defined:
4668 case bfd_link_hash_defweak:
4670 asection *sec;
4672 sec = h->root.u.def.section->output_section;
4673 BFD_ASSERT (bfd_is_abs_section (sec)
4674 || sec->owner == output_bfd);
4675 if (sec == obj_textsec (output_bfd))
4676 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4677 else if (sec == obj_datasec (output_bfd))
4678 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4679 else if (sec == obj_bsssec (output_bfd))
4680 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4681 else
4682 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4683 type |= N_EXT;
4684 val = (h->root.u.def.value
4685 + sec->vma
4686 + h->root.u.def.section->output_offset);
4688 break;
4689 case bfd_link_hash_common:
4690 type = N_UNDF | N_EXT;
4691 val = h->root.u.c.size;
4692 break;
4693 case bfd_link_hash_undefweak:
4694 type = N_WEAKU;
4695 val = 0;
4696 case bfd_link_hash_indirect:
4697 /* We ignore these symbols, since the indirected symbol is
4698 already in the hash table. */
4699 return TRUE;
4702 H_PUT_8 (output_bfd, type, outsym.e_type);
4703 H_PUT_8 (output_bfd, 0, outsym.e_other);
4704 H_PUT_16 (output_bfd, 0, outsym.e_desc);
4705 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4706 FALSE);
4707 if (indx == - (bfd_size_type) 1)
4709 /* FIXME: No way to handle errors. */
4710 abort ();
4712 PUT_WORD (output_bfd, indx, outsym.e_strx);
4713 PUT_WORD (output_bfd, val, outsym.e_value);
4715 amt = EXTERNAL_NLIST_SIZE;
4716 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4717 || bfd_bwrite ((PTR) &outsym, amt, output_bfd) != amt)
4719 /* FIXME: No way to handle errors. */
4720 abort ();
4723 finfo->symoff += EXTERNAL_NLIST_SIZE;
4724 h->indx = obj_aout_external_sym_count (output_bfd);
4725 ++obj_aout_external_sym_count (output_bfd);
4727 return TRUE;
4730 /* Link an a.out section into the output file. */
4732 static bfd_boolean
4733 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4734 rel_size)
4735 struct aout_final_link_info *finfo;
4736 bfd *input_bfd;
4737 asection *input_section;
4738 file_ptr *reloff_ptr;
4739 bfd_size_type rel_size;
4741 bfd_size_type input_size;
4742 PTR relocs;
4744 /* Get the section contents. */
4745 input_size = bfd_section_size (input_bfd, input_section);
4746 if (! bfd_get_section_contents (input_bfd, input_section,
4747 (PTR) finfo->contents,
4748 (file_ptr) 0, input_size))
4749 return FALSE;
4751 /* Read in the relocs if we haven't already done it. */
4752 if (aout_section_data (input_section) != NULL
4753 && aout_section_data (input_section)->relocs != NULL)
4754 relocs = aout_section_data (input_section)->relocs;
4755 else
4757 relocs = finfo->relocs;
4758 if (rel_size > 0)
4760 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4761 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4762 return FALSE;
4766 /* Relocate the section contents. */
4767 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4769 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4770 (struct reloc_std_external *) relocs,
4771 rel_size, finfo->contents))
4772 return FALSE;
4774 else
4776 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4777 (struct reloc_ext_external *) relocs,
4778 rel_size, finfo->contents))
4779 return FALSE;
4782 /* Write out the section contents. */
4783 if (! bfd_set_section_contents (finfo->output_bfd,
4784 input_section->output_section,
4785 (PTR) finfo->contents,
4786 (file_ptr) input_section->output_offset,
4787 input_size))
4788 return FALSE;
4790 /* If we are producing relocatable output, the relocs were
4791 modified, and we now write them out. */
4792 if (finfo->info->relocatable && rel_size > 0)
4794 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4795 return FALSE;
4796 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4797 return FALSE;
4798 *reloff_ptr += rel_size;
4800 /* Assert that the relocs have not run into the symbols, and
4801 that if these are the text relocs they have not run into the
4802 data relocs. */
4803 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4804 && (reloff_ptr != &finfo->treloff
4805 || (*reloff_ptr
4806 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4809 return TRUE;
4812 /* Get the section corresponding to a reloc index. */
4814 static INLINE asection *
4815 aout_reloc_index_to_section (abfd, indx)
4816 bfd *abfd;
4817 int indx;
4819 switch (indx & N_TYPE)
4821 case N_TEXT:
4822 return obj_textsec (abfd);
4823 case N_DATA:
4824 return obj_datasec (abfd);
4825 case N_BSS:
4826 return obj_bsssec (abfd);
4827 case N_ABS:
4828 case N_UNDF:
4829 return bfd_abs_section_ptr;
4830 default:
4831 abort ();
4833 /*NOTREACHED*/
4834 return NULL;
4837 /* Relocate an a.out section using standard a.out relocs. */
4839 static bfd_boolean
4840 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4841 rel_size, contents)
4842 struct aout_final_link_info *finfo;
4843 bfd *input_bfd;
4844 asection *input_section;
4845 struct reloc_std_external *relocs;
4846 bfd_size_type rel_size;
4847 bfd_byte *contents;
4849 bfd_boolean (*check_dynamic_reloc)
4850 PARAMS ((struct bfd_link_info *, bfd *, asection *,
4851 struct aout_link_hash_entry *, PTR, bfd_byte *, bfd_boolean *,
4852 bfd_vma *));
4853 bfd *output_bfd;
4854 bfd_boolean relocatable;
4855 struct external_nlist *syms;
4856 char *strings;
4857 struct aout_link_hash_entry **sym_hashes;
4858 int *symbol_map;
4859 bfd_size_type reloc_count;
4860 register struct reloc_std_external *rel;
4861 struct reloc_std_external *rel_end;
4863 output_bfd = finfo->output_bfd;
4864 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4866 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4867 BFD_ASSERT (input_bfd->xvec->header_byteorder
4868 == output_bfd->xvec->header_byteorder);
4870 relocatable = finfo->info->relocatable;
4871 syms = obj_aout_external_syms (input_bfd);
4872 strings = obj_aout_external_strings (input_bfd);
4873 sym_hashes = obj_aout_sym_hashes (input_bfd);
4874 symbol_map = finfo->symbol_map;
4876 reloc_count = rel_size / RELOC_STD_SIZE;
4877 rel = relocs;
4878 rel_end = rel + reloc_count;
4879 for (; rel < rel_end; rel++)
4881 bfd_vma r_addr;
4882 int r_index;
4883 int r_extern;
4884 int r_pcrel;
4885 int r_baserel = 0;
4886 reloc_howto_type *howto;
4887 struct aout_link_hash_entry *h = NULL;
4888 bfd_vma relocation;
4889 bfd_reloc_status_type r;
4891 r_addr = GET_SWORD (input_bfd, rel->r_address);
4893 #ifdef MY_reloc_howto
4894 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
4895 #else
4897 int r_jmptable;
4898 int r_relative;
4899 int r_length;
4900 unsigned int howto_idx;
4902 if (bfd_header_big_endian (input_bfd))
4904 r_index = (((unsigned int) rel->r_index[0] << 16)
4905 | ((unsigned int) rel->r_index[1] << 8)
4906 | rel->r_index[2]);
4907 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4908 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4909 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4910 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4911 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4912 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4913 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4915 else
4917 r_index = (((unsigned int) rel->r_index[2] << 16)
4918 | ((unsigned int) rel->r_index[1] << 8)
4919 | rel->r_index[0]);
4920 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4921 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4922 r_baserel = (0 != (rel->r_type[0]
4923 & RELOC_STD_BITS_BASEREL_LITTLE));
4924 r_jmptable= (0 != (rel->r_type[0]
4925 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4926 r_relative= (0 != (rel->r_type[0]
4927 & RELOC_STD_BITS_RELATIVE_LITTLE));
4928 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4929 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4932 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4933 + 16 * r_jmptable + 32 * r_relative);
4934 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4935 howto = howto_table_std + howto_idx;
4937 #endif
4939 if (relocatable)
4941 /* We are generating a relocatable output file, and must
4942 modify the reloc accordingly. */
4943 if (r_extern)
4945 /* If we know the symbol this relocation is against,
4946 convert it into a relocation against a section. This
4947 is what the native linker does. */
4948 h = sym_hashes[r_index];
4949 if (h != (struct aout_link_hash_entry *) NULL
4950 && (h->root.type == bfd_link_hash_defined
4951 || h->root.type == bfd_link_hash_defweak))
4953 asection *output_section;
4955 /* Change the r_extern value. */
4956 if (bfd_header_big_endian (output_bfd))
4957 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4958 else
4959 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4961 /* Compute a new r_index. */
4962 output_section = h->root.u.def.section->output_section;
4963 if (output_section == obj_textsec (output_bfd))
4964 r_index = N_TEXT;
4965 else if (output_section == obj_datasec (output_bfd))
4966 r_index = N_DATA;
4967 else if (output_section == obj_bsssec (output_bfd))
4968 r_index = N_BSS;
4969 else
4970 r_index = N_ABS;
4972 /* Add the symbol value and the section VMA to the
4973 addend stored in the contents. */
4974 relocation = (h->root.u.def.value
4975 + output_section->vma
4976 + h->root.u.def.section->output_offset);
4978 else
4980 /* We must change r_index according to the symbol
4981 map. */
4982 r_index = symbol_map[r_index];
4984 if (r_index == -1)
4986 if (h != NULL)
4988 /* We decided to strip this symbol, but it
4989 turns out that we can't. Note that we
4990 lose the other and desc information here.
4991 I don't think that will ever matter for a
4992 global symbol. */
4993 if (h->indx < 0)
4995 h->indx = -2;
4996 h->written = FALSE;
4997 if (! aout_link_write_other_symbol (h,
4998 (PTR) finfo))
4999 return FALSE;
5001 r_index = h->indx;
5003 else
5005 const char *name;
5007 name = strings + GET_WORD (input_bfd,
5008 syms[r_index].e_strx);
5009 if (! ((*finfo->info->callbacks->unattached_reloc)
5010 (finfo->info, name, input_bfd, input_section,
5011 r_addr)))
5012 return FALSE;
5013 r_index = 0;
5017 relocation = 0;
5020 /* Write out the new r_index value. */
5021 if (bfd_header_big_endian (output_bfd))
5023 rel->r_index[0] = r_index >> 16;
5024 rel->r_index[1] = r_index >> 8;
5025 rel->r_index[2] = r_index;
5027 else
5029 rel->r_index[2] = r_index >> 16;
5030 rel->r_index[1] = r_index >> 8;
5031 rel->r_index[0] = r_index;
5034 else
5036 asection *section;
5038 /* This is a relocation against a section. We must
5039 adjust by the amount that the section moved. */
5040 section = aout_reloc_index_to_section (input_bfd, r_index);
5041 relocation = (section->output_section->vma
5042 + section->output_offset
5043 - section->vma);
5046 /* Change the address of the relocation. */
5047 PUT_WORD (output_bfd,
5048 r_addr + input_section->output_offset,
5049 rel->r_address);
5051 /* Adjust a PC relative relocation by removing the reference
5052 to the original address in the section and including the
5053 reference to the new address. */
5054 if (r_pcrel)
5055 relocation -= (input_section->output_section->vma
5056 + input_section->output_offset
5057 - input_section->vma);
5059 #ifdef MY_relocatable_reloc
5060 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
5061 #endif
5063 if (relocation == 0)
5064 r = bfd_reloc_ok;
5065 else
5066 r = MY_relocate_contents (howto,
5067 input_bfd, relocation,
5068 contents + r_addr);
5070 else
5072 bfd_boolean hundef;
5074 /* We are generating an executable, and must do a full
5075 relocation. */
5076 hundef = FALSE;
5078 if (r_extern)
5080 h = sym_hashes[r_index];
5082 if (h != (struct aout_link_hash_entry *) NULL
5083 && (h->root.type == bfd_link_hash_defined
5084 || h->root.type == bfd_link_hash_defweak))
5086 relocation = (h->root.u.def.value
5087 + h->root.u.def.section->output_section->vma
5088 + h->root.u.def.section->output_offset);
5090 else if (h != (struct aout_link_hash_entry *) NULL
5091 && h->root.type == bfd_link_hash_undefweak)
5092 relocation = 0;
5093 else
5095 hundef = TRUE;
5096 relocation = 0;
5099 else
5101 asection *section;
5103 section = aout_reloc_index_to_section (input_bfd, r_index);
5104 relocation = (section->output_section->vma
5105 + section->output_offset
5106 - section->vma);
5107 if (r_pcrel)
5108 relocation += input_section->vma;
5111 if (check_dynamic_reloc != NULL)
5113 bfd_boolean skip;
5115 if (! ((*check_dynamic_reloc)
5116 (finfo->info, input_bfd, input_section, h,
5117 (PTR) rel, contents, &skip, &relocation)))
5118 return FALSE;
5119 if (skip)
5120 continue;
5123 /* Now warn if a global symbol is undefined. We could not
5124 do this earlier, because check_dynamic_reloc might want
5125 to skip this reloc. */
5126 if (hundef && ! finfo->info->shared && ! r_baserel)
5128 const char *name;
5130 if (h != NULL)
5131 name = h->root.root.string;
5132 else
5133 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5134 if (! ((*finfo->info->callbacks->undefined_symbol)
5135 (finfo->info, name, input_bfd, input_section,
5136 r_addr, TRUE)))
5137 return FALSE;
5140 r = MY_final_link_relocate (howto,
5141 input_bfd, input_section,
5142 contents, r_addr, relocation,
5143 (bfd_vma) 0);
5146 if (r != bfd_reloc_ok)
5148 switch (r)
5150 default:
5151 case bfd_reloc_outofrange:
5152 abort ();
5153 case bfd_reloc_overflow:
5155 const char *name;
5157 if (h != NULL)
5158 name = h->root.root.string;
5159 else if (r_extern)
5160 name = strings + GET_WORD (input_bfd,
5161 syms[r_index].e_strx);
5162 else
5164 asection *s;
5166 s = aout_reloc_index_to_section (input_bfd, r_index);
5167 name = bfd_section_name (input_bfd, s);
5169 if (! ((*finfo->info->callbacks->reloc_overflow)
5170 (finfo->info, name, howto->name,
5171 (bfd_vma) 0, input_bfd, input_section, r_addr)))
5172 return FALSE;
5174 break;
5179 return TRUE;
5182 /* Relocate an a.out section using extended a.out relocs. */
5184 static bfd_boolean
5185 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5186 rel_size, contents)
5187 struct aout_final_link_info *finfo;
5188 bfd *input_bfd;
5189 asection *input_section;
5190 struct reloc_ext_external *relocs;
5191 bfd_size_type rel_size;
5192 bfd_byte *contents;
5194 bfd_boolean (*check_dynamic_reloc)
5195 PARAMS ((struct bfd_link_info *, bfd *, asection *,
5196 struct aout_link_hash_entry *, PTR, bfd_byte *, bfd_boolean *,
5197 bfd_vma *));
5198 bfd *output_bfd;
5199 bfd_boolean relocatable;
5200 struct external_nlist *syms;
5201 char *strings;
5202 struct aout_link_hash_entry **sym_hashes;
5203 int *symbol_map;
5204 bfd_size_type reloc_count;
5205 register struct reloc_ext_external *rel;
5206 struct reloc_ext_external *rel_end;
5208 output_bfd = finfo->output_bfd;
5209 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5211 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5212 BFD_ASSERT (input_bfd->xvec->header_byteorder
5213 == output_bfd->xvec->header_byteorder);
5215 relocatable = finfo->info->relocatable;
5216 syms = obj_aout_external_syms (input_bfd);
5217 strings = obj_aout_external_strings (input_bfd);
5218 sym_hashes = obj_aout_sym_hashes (input_bfd);
5219 symbol_map = finfo->symbol_map;
5221 reloc_count = rel_size / RELOC_EXT_SIZE;
5222 rel = relocs;
5223 rel_end = rel + reloc_count;
5224 for (; rel < rel_end; rel++)
5226 bfd_vma r_addr;
5227 int r_index;
5228 int r_extern;
5229 unsigned int r_type;
5230 bfd_vma r_addend;
5231 struct aout_link_hash_entry *h = NULL;
5232 asection *r_section = NULL;
5233 bfd_vma relocation;
5235 r_addr = GET_SWORD (input_bfd, rel->r_address);
5237 if (bfd_header_big_endian (input_bfd))
5239 r_index = (((unsigned int) rel->r_index[0] << 16)
5240 | ((unsigned int) rel->r_index[1] << 8)
5241 | rel->r_index[2]);
5242 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5243 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5244 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5246 else
5248 r_index = (((unsigned int) rel->r_index[2] << 16)
5249 | ((unsigned int) rel->r_index[1] << 8)
5250 | rel->r_index[0]);
5251 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5252 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5253 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5256 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5258 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5260 if (relocatable)
5262 /* We are generating a relocatable output file, and must
5263 modify the reloc accordingly. */
5264 if (r_extern
5265 || r_type == (unsigned int) RELOC_BASE10
5266 || r_type == (unsigned int) RELOC_BASE13
5267 || r_type == (unsigned int) RELOC_BASE22)
5269 /* If we know the symbol this relocation is against,
5270 convert it into a relocation against a section. This
5271 is what the native linker does. */
5272 if (r_type == (unsigned int) RELOC_BASE10
5273 || r_type == (unsigned int) RELOC_BASE13
5274 || r_type == (unsigned int) RELOC_BASE22)
5275 h = NULL;
5276 else
5277 h = sym_hashes[r_index];
5278 if (h != (struct aout_link_hash_entry *) NULL
5279 && (h->root.type == bfd_link_hash_defined
5280 || h->root.type == bfd_link_hash_defweak))
5282 asection *output_section;
5284 /* Change the r_extern value. */
5285 if (bfd_header_big_endian (output_bfd))
5286 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5287 else
5288 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5290 /* Compute a new r_index. */
5291 output_section = h->root.u.def.section->output_section;
5292 if (output_section == obj_textsec (output_bfd))
5293 r_index = N_TEXT;
5294 else if (output_section == obj_datasec (output_bfd))
5295 r_index = N_DATA;
5296 else if (output_section == obj_bsssec (output_bfd))
5297 r_index = N_BSS;
5298 else
5299 r_index = N_ABS;
5301 /* Add the symbol value and the section VMA to the
5302 addend. */
5303 relocation = (h->root.u.def.value
5304 + output_section->vma
5305 + h->root.u.def.section->output_offset);
5307 /* Now RELOCATION is the VMA of the final
5308 destination. If this is a PC relative reloc,
5309 then ADDEND is the negative of the source VMA.
5310 We want to set ADDEND to the difference between
5311 the destination VMA and the source VMA, which
5312 means we must adjust RELOCATION by the change in
5313 the source VMA. This is done below. */
5315 else
5317 /* We must change r_index according to the symbol
5318 map. */
5319 r_index = symbol_map[r_index];
5321 if (r_index == -1)
5323 if (h != NULL)
5325 /* We decided to strip this symbol, but it
5326 turns out that we can't. Note that we
5327 lose the other and desc information here.
5328 I don't think that will ever matter for a
5329 global symbol. */
5330 if (h->indx < 0)
5332 h->indx = -2;
5333 h->written = FALSE;
5334 if (! aout_link_write_other_symbol (h,
5335 (PTR) finfo))
5336 return FALSE;
5338 r_index = h->indx;
5340 else
5342 const char *name;
5344 name = strings + GET_WORD (input_bfd,
5345 syms[r_index].e_strx);
5346 if (! ((*finfo->info->callbacks->unattached_reloc)
5347 (finfo->info, name, input_bfd, input_section,
5348 r_addr)))
5349 return FALSE;
5350 r_index = 0;
5354 relocation = 0;
5356 /* If this is a PC relative reloc, then the addend
5357 is the negative of the source VMA. We must
5358 adjust it by the change in the source VMA. This
5359 is done below. */
5362 /* Write out the new r_index value. */
5363 if (bfd_header_big_endian (output_bfd))
5365 rel->r_index[0] = r_index >> 16;
5366 rel->r_index[1] = r_index >> 8;
5367 rel->r_index[2] = r_index;
5369 else
5371 rel->r_index[2] = r_index >> 16;
5372 rel->r_index[1] = r_index >> 8;
5373 rel->r_index[0] = r_index;
5376 else
5378 /* This is a relocation against a section. We must
5379 adjust by the amount that the section moved. */
5380 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5381 relocation = (r_section->output_section->vma
5382 + r_section->output_offset
5383 - r_section->vma);
5385 /* If this is a PC relative reloc, then the addend is
5386 the difference in VMA between the destination and the
5387 source. We have just adjusted for the change in VMA
5388 of the destination, so we must also adjust by the
5389 change in VMA of the source. This is done below. */
5392 /* As described above, we must always adjust a PC relative
5393 reloc by the change in VMA of the source. However, if
5394 pcrel_offset is set, then the addend does not include the
5395 location within the section, in which case we don't need
5396 to adjust anything. */
5397 if (howto_table_ext[r_type].pc_relative
5398 && ! howto_table_ext[r_type].pcrel_offset)
5399 relocation -= (input_section->output_section->vma
5400 + input_section->output_offset
5401 - input_section->vma);
5403 /* Change the addend if necessary. */
5404 if (relocation != 0)
5405 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5407 /* Change the address of the relocation. */
5408 PUT_WORD (output_bfd,
5409 r_addr + input_section->output_offset,
5410 rel->r_address);
5412 else
5414 bfd_boolean hundef;
5415 bfd_reloc_status_type r;
5417 /* We are generating an executable, and must do a full
5418 relocation. */
5419 hundef = FALSE;
5421 if (r_extern)
5423 h = sym_hashes[r_index];
5425 if (h != (struct aout_link_hash_entry *) NULL
5426 && (h->root.type == bfd_link_hash_defined
5427 || h->root.type == bfd_link_hash_defweak))
5429 relocation = (h->root.u.def.value
5430 + h->root.u.def.section->output_section->vma
5431 + h->root.u.def.section->output_offset);
5433 else if (h != (struct aout_link_hash_entry *) NULL
5434 && h->root.type == bfd_link_hash_undefweak)
5435 relocation = 0;
5436 else
5438 hundef = TRUE;
5439 relocation = 0;
5442 else if (r_type == (unsigned int) RELOC_BASE10
5443 || r_type == (unsigned int) RELOC_BASE13
5444 || r_type == (unsigned int) RELOC_BASE22)
5446 struct external_nlist *sym;
5447 int type;
5449 /* For base relative relocs, r_index is always an index
5450 into the symbol table, even if r_extern is 0. */
5451 sym = syms + r_index;
5452 type = H_GET_8 (input_bfd, sym->e_type);
5453 if ((type & N_TYPE) == N_TEXT
5454 || type == N_WEAKT)
5455 r_section = obj_textsec (input_bfd);
5456 else if ((type & N_TYPE) == N_DATA
5457 || type == N_WEAKD)
5458 r_section = obj_datasec (input_bfd);
5459 else if ((type & N_TYPE) == N_BSS
5460 || type == N_WEAKB)
5461 r_section = obj_bsssec (input_bfd);
5462 else if ((type & N_TYPE) == N_ABS
5463 || type == N_WEAKA)
5464 r_section = bfd_abs_section_ptr;
5465 else
5466 abort ();
5467 relocation = (r_section->output_section->vma
5468 + r_section->output_offset
5469 + (GET_WORD (input_bfd, sym->e_value)
5470 - r_section->vma));
5472 else
5474 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5476 /* If this is a PC relative reloc, then R_ADDEND is the
5477 difference between the two vmas, or
5478 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5479 where
5480 old_dest_sec == section->vma
5482 old_src_sec == input_section->vma
5484 old_src_off == r_addr
5486 _bfd_final_link_relocate expects RELOCATION +
5487 R_ADDEND to be the VMA of the destination minus
5488 r_addr (the minus r_addr is because this relocation
5489 is not pcrel_offset, which is a bit confusing and
5490 should, perhaps, be changed), or
5491 new_dest_sec
5492 where
5493 new_dest_sec == output_section->vma + output_offset
5494 We arrange for this to happen by setting RELOCATION to
5495 new_dest_sec + old_src_sec - old_dest_sec
5497 If this is not a PC relative reloc, then R_ADDEND is
5498 simply the VMA of the destination, so we set
5499 RELOCATION to the change in the destination VMA, or
5500 new_dest_sec - old_dest_sec
5502 relocation = (r_section->output_section->vma
5503 + r_section->output_offset
5504 - r_section->vma);
5505 if (howto_table_ext[r_type].pc_relative)
5506 relocation += input_section->vma;
5509 if (check_dynamic_reloc != NULL)
5511 bfd_boolean skip;
5513 if (! ((*check_dynamic_reloc)
5514 (finfo->info, input_bfd, input_section, h,
5515 (PTR) rel, contents, &skip, &relocation)))
5516 return FALSE;
5517 if (skip)
5518 continue;
5521 /* Now warn if a global symbol is undefined. We could not
5522 do this earlier, because check_dynamic_reloc might want
5523 to skip this reloc. */
5524 if (hundef
5525 && ! finfo->info->shared
5526 && r_type != (unsigned int) RELOC_BASE10
5527 && r_type != (unsigned int) RELOC_BASE13
5528 && r_type != (unsigned int) RELOC_BASE22)
5530 const char *name;
5532 if (h != NULL)
5533 name = h->root.root.string;
5534 else
5535 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5536 if (! ((*finfo->info->callbacks->undefined_symbol)
5537 (finfo->info, name, input_bfd, input_section,
5538 r_addr, TRUE)))
5539 return FALSE;
5542 if (r_type != (unsigned int) RELOC_SPARC_REV32)
5543 r = MY_final_link_relocate (howto_table_ext + r_type,
5544 input_bfd, input_section,
5545 contents, r_addr, relocation,
5546 r_addend);
5547 else
5549 bfd_vma x;
5551 x = bfd_get_32 (input_bfd, contents + r_addr);
5552 x = x + relocation + r_addend;
5553 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5554 r = bfd_reloc_ok;
5557 if (r != bfd_reloc_ok)
5559 switch (r)
5561 default:
5562 case bfd_reloc_outofrange:
5563 abort ();
5564 case bfd_reloc_overflow:
5566 const char *name;
5568 if (h != NULL)
5569 name = h->root.root.string;
5570 else if (r_extern
5571 || r_type == (unsigned int) RELOC_BASE10
5572 || r_type == (unsigned int) RELOC_BASE13
5573 || r_type == (unsigned int) RELOC_BASE22)
5574 name = strings + GET_WORD (input_bfd,
5575 syms[r_index].e_strx);
5576 else
5578 asection *s;
5580 s = aout_reloc_index_to_section (input_bfd, r_index);
5581 name = bfd_section_name (input_bfd, s);
5583 if (! ((*finfo->info->callbacks->reloc_overflow)
5584 (finfo->info, name, howto_table_ext[r_type].name,
5585 r_addend, input_bfd, input_section, r_addr)))
5586 return FALSE;
5588 break;
5594 return TRUE;
5597 /* Handle a link order which is supposed to generate a reloc. */
5599 static bfd_boolean
5600 aout_link_reloc_link_order (finfo, o, p)
5601 struct aout_final_link_info *finfo;
5602 asection *o;
5603 struct bfd_link_order *p;
5605 struct bfd_link_order_reloc *pr;
5606 int r_index;
5607 int r_extern;
5608 reloc_howto_type *howto;
5609 file_ptr *reloff_ptr = NULL;
5610 struct reloc_std_external srel;
5611 struct reloc_ext_external erel;
5612 PTR rel_ptr;
5613 bfd_size_type amt;
5615 pr = p->u.reloc.p;
5617 if (p->type == bfd_section_reloc_link_order)
5619 r_extern = 0;
5620 if (bfd_is_abs_section (pr->u.section))
5621 r_index = N_ABS | N_EXT;
5622 else
5624 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5625 r_index = pr->u.section->target_index;
5628 else
5630 struct aout_link_hash_entry *h;
5632 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5633 r_extern = 1;
5634 h = ((struct aout_link_hash_entry *)
5635 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5636 pr->u.name, FALSE, FALSE, TRUE));
5637 if (h != (struct aout_link_hash_entry *) NULL
5638 && h->indx >= 0)
5639 r_index = h->indx;
5640 else if (h != NULL)
5642 /* We decided to strip this symbol, but it turns out that we
5643 can't. Note that we lose the other and desc information
5644 here. I don't think that will ever matter for a global
5645 symbol. */
5646 h->indx = -2;
5647 h->written = FALSE;
5648 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5649 return FALSE;
5650 r_index = h->indx;
5652 else
5654 if (! ((*finfo->info->callbacks->unattached_reloc)
5655 (finfo->info, pr->u.name, (bfd *) NULL,
5656 (asection *) NULL, (bfd_vma) 0)))
5657 return FALSE;
5658 r_index = 0;
5662 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5663 if (howto == 0)
5665 bfd_set_error (bfd_error_bad_value);
5666 return FALSE;
5669 if (o == obj_textsec (finfo->output_bfd))
5670 reloff_ptr = &finfo->treloff;
5671 else if (o == obj_datasec (finfo->output_bfd))
5672 reloff_ptr = &finfo->dreloff;
5673 else
5674 abort ();
5676 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5678 #ifdef MY_put_reloc
5679 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
5680 &srel);
5681 #else
5683 int r_pcrel;
5684 int r_baserel;
5685 int r_jmptable;
5686 int r_relative;
5687 int r_length;
5689 r_pcrel = (int) howto->pc_relative;
5690 r_baserel = (howto->type & 8) != 0;
5691 r_jmptable = (howto->type & 16) != 0;
5692 r_relative = (howto->type & 32) != 0;
5693 r_length = howto->size;
5695 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5696 if (bfd_header_big_endian (finfo->output_bfd))
5698 srel.r_index[0] = r_index >> 16;
5699 srel.r_index[1] = r_index >> 8;
5700 srel.r_index[2] = r_index;
5701 srel.r_type[0] =
5702 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5703 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5704 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5705 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5706 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5707 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5709 else
5711 srel.r_index[2] = r_index >> 16;
5712 srel.r_index[1] = r_index >> 8;
5713 srel.r_index[0] = r_index;
5714 srel.r_type[0] =
5715 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5716 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5717 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5718 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5719 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5720 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5723 #endif
5724 rel_ptr = (PTR) &srel;
5726 /* We have to write the addend into the object file, since
5727 standard a.out relocs are in place. It would be more
5728 reliable if we had the current contents of the file here,
5729 rather than assuming zeroes, but we can't read the file since
5730 it was opened using bfd_openw. */
5731 if (pr->addend != 0)
5733 bfd_size_type size;
5734 bfd_reloc_status_type r;
5735 bfd_byte *buf;
5736 bfd_boolean ok;
5738 size = bfd_get_reloc_size (howto);
5739 buf = (bfd_byte *) bfd_zmalloc (size);
5740 if (buf == (bfd_byte *) NULL)
5741 return FALSE;
5742 r = MY_relocate_contents (howto, finfo->output_bfd,
5743 (bfd_vma) pr->addend, buf);
5744 switch (r)
5746 case bfd_reloc_ok:
5747 break;
5748 default:
5749 case bfd_reloc_outofrange:
5750 abort ();
5751 case bfd_reloc_overflow:
5752 if (! ((*finfo->info->callbacks->reloc_overflow)
5753 (finfo->info,
5754 (p->type == bfd_section_reloc_link_order
5755 ? bfd_section_name (finfo->output_bfd,
5756 pr->u.section)
5757 : pr->u.name),
5758 howto->name, pr->addend, (bfd *) NULL,
5759 (asection *) NULL, (bfd_vma) 0)))
5761 free (buf);
5762 return FALSE;
5764 break;
5766 ok = bfd_set_section_contents (finfo->output_bfd, o, (PTR) buf,
5767 (file_ptr) p->offset, size);
5768 free (buf);
5769 if (! ok)
5770 return FALSE;
5773 else
5775 #ifdef MY_put_ext_reloc
5776 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5777 howto, &erel, pr->addend);
5778 #else
5779 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5781 if (bfd_header_big_endian (finfo->output_bfd))
5783 erel.r_index[0] = r_index >> 16;
5784 erel.r_index[1] = r_index >> 8;
5785 erel.r_index[2] = r_index;
5786 erel.r_type[0] =
5787 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5788 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5790 else
5792 erel.r_index[2] = r_index >> 16;
5793 erel.r_index[1] = r_index >> 8;
5794 erel.r_index[0] = r_index;
5795 erel.r_type[0] =
5796 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5797 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5800 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
5801 #endif /* MY_put_ext_reloc */
5803 rel_ptr = (PTR) &erel;
5806 amt = obj_reloc_entry_size (finfo->output_bfd);
5807 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5808 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
5809 return FALSE;
5811 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5813 /* Assert that the relocs have not run into the symbols, and that n
5814 the text relocs have not run into the data relocs. */
5815 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5816 && (reloff_ptr != &finfo->treloff
5817 || (*reloff_ptr
5818 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
5820 return TRUE;