cb0887a4bacb349dec9bbf8c2cdf61dd4d3c2b0d
[deliverable/binutils-gdb.git] / bfd / aoutx.h
1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2014 Free Software Foundation, Inc.
3 Written by Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 /*
23 SECTION
24 a.out backends
25
26 DESCRIPTION
27
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
31 information.
32
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
38 specific target.
39
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
44
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
50
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
53
54 | #define ARCH_SIZE 32
55 | #include "aoutx.h"
56
57 Which exports names:
58
59 | ...
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
62 | aout_32_get_lineno
63 | aout_32_get_reloc_upper_bound
64 | ...
65
66 from @file{sunos.c}:
67
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
70 | #include "aoutf1.h"
71
72 requires all the names from @file{aout32.c}, and produces the jump vector
73
74 | sparc_aout_sunos_be_vec
75
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
84 the object file.
85
86 When porting it to run on a new system, you must supply:
87
88 | HOST_PAGE_SIZE
89 | HOST_SEGMENT_SIZE
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
93 | HOST_STACK_END_ADDR
94
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
100
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
103
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
105 to use the
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
108
109 /* Some assumptions:
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
112 get set on input.
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
117
118 #define KEEPIT udata.i
119
120 #include "sysdep.h"
121 #include "bfd.h"
122 #include "safe-ctype.h"
123 #include "bfdlink.h"
124
125 #include "libaout.h"
126 #include "libbfd.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
129 #include "aout/ar.h"
130
131 /*
132 SUBSECTION
133 Relocations
134
135 DESCRIPTION
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
138
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
142 addend. */
143
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
150 #endif
151
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
154 #endif
155
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
158 #endif
159
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
162 #endif
163
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
166 #endif
167
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
170 #endif
171
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
174 #endif
175
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
178
179 reloc_howto_type howto_table_ext[] =
180 {
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
183 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
184 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
185 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
186 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
187 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
188 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
189 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
190 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
191 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
193 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
194 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
195 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
196 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
197 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
198 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
199 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
200 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
201 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
202 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
203 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
204 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
207 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
210 };
211
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
213
214 reloc_howto_type howto_table_std[] =
215 {
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
218 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
219 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
220 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
221 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
222 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
223 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
224 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
225 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
226 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
227 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
228 EMPTY_HOWTO (-1),
229 EMPTY_HOWTO (-1),
230 EMPTY_HOWTO (-1),
231 EMPTY_HOWTO (-1),
232 EMPTY_HOWTO (-1),
233 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
234 EMPTY_HOWTO (-1),
235 EMPTY_HOWTO (-1),
236 EMPTY_HOWTO (-1),
237 EMPTY_HOWTO (-1),
238 EMPTY_HOWTO (-1),
239 EMPTY_HOWTO (-1),
240 EMPTY_HOWTO (-1),
241 EMPTY_HOWTO (-1),
242 EMPTY_HOWTO (-1),
243 EMPTY_HOWTO (-1),
244 EMPTY_HOWTO (-1),
245 EMPTY_HOWTO (-1),
246 EMPTY_HOWTO (-1),
247 EMPTY_HOWTO (-1),
248 EMPTY_HOWTO (-1),
249 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", 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 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
258 };
259
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
261
262 reloc_howto_type *
263 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
264 {
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
268
269 if (code == BFD_RELOC_CTOR)
270 switch (bfd_arch_bits_per_address (abfd))
271 {
272 case 32:
273 code = BFD_RELOC_32;
274 break;
275 case 64:
276 code = BFD_RELOC_64;
277 break;
278 }
279
280 if (ext)
281 switch (code)
282 {
283 EXT (BFD_RELOC_8, 0);
284 EXT (BFD_RELOC_16, 1);
285 EXT (BFD_RELOC_32, 2);
286 EXT (BFD_RELOC_HI22, 8);
287 EXT (BFD_RELOC_LO10, 11);
288 EXT (BFD_RELOC_32_PCREL_S2, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22, 7);
290 EXT (BFD_RELOC_SPARC13, 10);
291 EXT (BFD_RELOC_SPARC_GOT10, 14);
292 EXT (BFD_RELOC_SPARC_BASE13, 15);
293 EXT (BFD_RELOC_SPARC_GOT13, 15);
294 EXT (BFD_RELOC_SPARC_GOT22, 16);
295 EXT (BFD_RELOC_SPARC_PC10, 17);
296 EXT (BFD_RELOC_SPARC_PC22, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30, 19);
298 EXT (BFD_RELOC_SPARC_REV32, 26);
299 default:
300 return NULL;
301 }
302 else
303 /* std relocs. */
304 switch (code)
305 {
306 STD (BFD_RELOC_8, 0);
307 STD (BFD_RELOC_16, 1);
308 STD (BFD_RELOC_32, 2);
309 STD (BFD_RELOC_8_PCREL, 4);
310 STD (BFD_RELOC_16_PCREL, 5);
311 STD (BFD_RELOC_32_PCREL, 6);
312 STD (BFD_RELOC_16_BASEREL, 9);
313 STD (BFD_RELOC_32_BASEREL, 10);
314 default:
315 return NULL;
316 }
317 }
318
319 reloc_howto_type *
320 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
321 {
322 unsigned int i, size;
323 reloc_howto_type *howto_table;
324
325 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
326 {
327 howto_table = howto_table_ext;
328 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
329 }
330 else
331 {
332 howto_table = howto_table_std;
333 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
334 }
335
336 for (i = 0; i < size; i++)
337 if (howto_table[i].name != NULL
338 && strcasecmp (howto_table[i].name, r_name) == 0)
339 return &howto_table[i];
340
341 return NULL;
342 }
343
344 /*
345 SUBSECTION
346 Internal entry points
347
348 DESCRIPTION
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
352 */
353
354 /*
355 FUNCTION
356 aout_@var{size}_swap_exec_header_in
357
358 SYNOPSIS
359 void aout_@var{size}_swap_exec_header_in,
360 (bfd *abfd,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
363
364 DESCRIPTION
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
368 */
369
370 #ifndef NAME_swap_exec_header_in
371 void
372 NAME (aout, swap_exec_header_in) (bfd *abfd,
373 struct external_exec *bytes,
374 struct internal_exec *execp)
375 {
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp, 0, sizeof (struct internal_exec));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp->a_info = H_GET_32 (abfd, bytes->e_info);
383 execp->a_text = GET_WORD (abfd, bytes->e_text);
384 execp->a_data = GET_WORD (abfd, bytes->e_data);
385 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
386 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
387 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
388 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
389 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
390 }
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
392 #endif
393
394 /*
395 FUNCTION
396 aout_@var{size}_swap_exec_header_out
397
398 SYNOPSIS
399 void aout_@var{size}_swap_exec_header_out
400 (bfd *abfd,
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
403
404 DESCRIPTION
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
407 */
408 void
409 NAME (aout, swap_exec_header_out) (bfd *abfd,
410 struct internal_exec *execp,
411 struct external_exec *bytes)
412 {
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
415 PUT_WORD (abfd, execp->a_text , bytes->e_text);
416 PUT_WORD (abfd, execp->a_data , bytes->e_data);
417 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
418 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
419 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
420 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
421 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
422 }
423
424 /* Make all the section for an a.out file. */
425
426 bfd_boolean
427 NAME (aout, make_sections) (bfd *abfd)
428 {
429 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
430 return FALSE;
431 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
432 return FALSE;
433 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
434 return FALSE;
435 return TRUE;
436 }
437
438 /*
439 FUNCTION
440 aout_@var{size}_some_aout_object_p
441
442 SYNOPSIS
443 const bfd_target *aout_@var{size}_some_aout_object_p
444 (bfd *abfd,
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
447
448 DESCRIPTION
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
454 */
455
456 const bfd_target *
457 NAME (aout, some_aout_object_p) (bfd *abfd,
458 struct internal_exec *execp,
459 const bfd_target *(*callback_to_real_object_p) (bfd *))
460 {
461 struct aout_data_struct *rawptr, *oldrawptr;
462 const bfd_target *result;
463 bfd_size_type amt = sizeof (* rawptr);
464
465 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
466 if (rawptr == NULL)
467 return NULL;
468
469 oldrawptr = abfd->tdata.aout_data;
470 abfd->tdata.aout_data = rawptr;
471
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr != NULL)
477 *abfd->tdata.aout_data = *oldrawptr;
478
479 abfd->tdata.aout_data->a.hdr = &rawptr->e;
480 /* Copy in the internal_exec struct. */
481 *(abfd->tdata.aout_data->a.hdr) = *execp;
482 execp = abfd->tdata.aout_data->a.hdr;
483
484 /* Set the file flags. */
485 abfd->flags = BFD_NO_FLAGS;
486 if (execp->a_drsize || execp->a_trsize)
487 abfd->flags |= HAS_RELOC;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
489 if (execp->a_syms)
490 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
491 if (N_DYNAMIC (*execp))
492 abfd->flags |= DYNAMIC;
493
494 if (N_MAGIC (*execp) == ZMAGIC)
495 {
496 abfd->flags |= D_PAGED | WP_TEXT;
497 adata (abfd).magic = z_magic;
498 }
499 else if (N_MAGIC (*execp) == QMAGIC)
500 {
501 abfd->flags |= D_PAGED | WP_TEXT;
502 adata (abfd).magic = z_magic;
503 adata (abfd).subformat = q_magic_format;
504 }
505 else if (N_MAGIC (*execp) == NMAGIC)
506 {
507 abfd->flags |= WP_TEXT;
508 adata (abfd).magic = n_magic;
509 }
510 else if (N_MAGIC (*execp) == OMAGIC
511 || N_MAGIC (*execp) == BMAGIC)
512 adata (abfd).magic = o_magic;
513 else
514 /* Should have been checked with N_BADMAG before this routine
515 was called. */
516 abort ();
517
518 bfd_get_start_address (abfd) = execp->a_entry;
519
520 obj_aout_symbols (abfd) = NULL;
521 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
522
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
525
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
528
529 #ifdef USE_MMAP
530 bfd_init_window (&obj_aout_sym_window (abfd));
531 bfd_init_window (&obj_aout_string_window (abfd));
532 #endif
533 obj_aout_external_syms (abfd) = NULL;
534 obj_aout_external_strings (abfd) = NULL;
535 obj_aout_sym_hashes (abfd) = NULL;
536
537 if (! NAME (aout, make_sections) (abfd))
538 goto error_ret;
539
540 obj_datasec (abfd)->size = execp->a_data;
541 obj_bsssec (abfd)->size = execp->a_bss;
542
543 obj_textsec (abfd)->flags =
544 (execp->a_trsize != 0
545 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
546 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
547 obj_datasec (abfd)->flags =
548 (execp->a_drsize != 0
549 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
550 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
551 obj_bsssec (abfd)->flags = SEC_ALLOC;
552
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
559
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
563
564 struct exec *execp = exec_hdr (abfd);
565
566 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
567 /* Data and bss are already filled in since they're so standard. */
568
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
571 obj_datasec (abfd)->vma = N_DATADDR (*execp);
572 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
573
574 /* The file offsets of the sections. */
575 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
576 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
577
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
580 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
581
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd) = N_STROFF (*execp);
584 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
585
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (*exec_hdr (abfd)))
588 {
589 default:
590 abfd->obj_arch = bfd_arch_obscure;
591 break;
592 }
593
594 adata (abfd)->page_size = TARGET_PAGE_SIZE;
595 adata (abfd)->segment_size = SEGMENT_SIZE;
596 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
597
598 return abfd->xvec;
599
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
605
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
609
610 result = (*callback_to_real_object_p) (abfd);
611
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
617
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
622
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
626
627 if (execp->a_entry != 0
628 || (execp->a_entry >= obj_textsec (abfd)->vma
629 && execp->a_entry < (obj_textsec (abfd)->vma
630 + obj_textsec (abfd)->size)
631 && execp->a_trsize == 0
632 && execp->a_drsize == 0))
633 abfd->flags |= EXEC_P;
634 #ifdef STAT_FOR_EXEC
635 else
636 {
637 struct stat stat_buf;
638
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd->iostream != NULL
647 && (abfd->flags & BFD_IN_MEMORY) == 0
648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
649 && ((stat_buf.st_mode & 0111) != 0))
650 abfd->flags |= EXEC_P;
651 }
652 #endif /* STAT_FOR_EXEC */
653
654 if (result)
655 return result;
656
657 error_ret:
658 bfd_release (abfd, rawptr);
659 abfd->tdata.aout_data = oldrawptr;
660 return NULL;
661 }
662
663 /*
664 FUNCTION
665 aout_@var{size}_mkobject
666
667 SYNOPSIS
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
669
670 DESCRIPTION
671 Initialize BFD @var{abfd} for use with a.out files.
672 */
673
674 bfd_boolean
675 NAME (aout, mkobject) (bfd *abfd)
676 {
677 struct aout_data_struct *rawptr;
678 bfd_size_type amt = sizeof (* rawptr);
679
680 bfd_set_error (bfd_error_system_call);
681
682 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
683 if (rawptr == NULL)
684 return FALSE;
685
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
688
689 obj_textsec (abfd) = NULL;
690 obj_datasec (abfd) = NULL;
691 obj_bsssec (abfd) = NULL;
692
693 return TRUE;
694 }
695
696 /*
697 FUNCTION
698 aout_@var{size}_machine_type
699
700 SYNOPSIS
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
705
706 DESCRIPTION
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
711
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
714 */
715
716 enum machine_type
717 NAME (aout, machine_type) (enum bfd_architecture arch,
718 unsigned long machine,
719 bfd_boolean *unknown)
720 {
721 enum machine_type arch_flags;
722
723 arch_flags = M_UNKNOWN;
724 *unknown = TRUE;
725
726 switch (arch)
727 {
728 case bfd_arch_sparc:
729 if (machine == 0
730 || machine == bfd_mach_sparc
731 || machine == bfd_mach_sparc_sparclite
732 || machine == bfd_mach_sparc_sparclite_le
733 || machine == bfd_mach_sparc_v8plus
734 || machine == bfd_mach_sparc_v8plusa
735 || machine == bfd_mach_sparc_v8plusb
736 || machine == bfd_mach_sparc_v9
737 || machine == bfd_mach_sparc_v9a
738 || machine == bfd_mach_sparc_v9b)
739 arch_flags = M_SPARC;
740 else if (machine == bfd_mach_sparc_sparclet)
741 arch_flags = M_SPARCLET;
742 break;
743
744 case bfd_arch_m68k:
745 switch (machine)
746 {
747 case 0: arch_flags = M_68010; break;
748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
749 case bfd_mach_m68010: arch_flags = M_68010; break;
750 case bfd_mach_m68020: arch_flags = M_68020; break;
751 default: arch_flags = M_UNKNOWN; break;
752 }
753 break;
754
755 case bfd_arch_i386:
756 if (machine == 0
757 || machine == bfd_mach_i386_i386
758 || machine == bfd_mach_i386_i386_intel_syntax)
759 arch_flags = M_386;
760 break;
761
762 case bfd_arch_arm:
763 if (machine == 0)
764 arch_flags = M_ARM;
765 break;
766
767 case bfd_arch_mips:
768 switch (machine)
769 {
770 case 0:
771 case bfd_mach_mips3000:
772 case bfd_mach_mips3900:
773 arch_flags = M_MIPS1;
774 break;
775 case bfd_mach_mips6000:
776 arch_flags = M_MIPS2;
777 break;
778 case bfd_mach_mips4000:
779 case bfd_mach_mips4010:
780 case bfd_mach_mips4100:
781 case bfd_mach_mips4300:
782 case bfd_mach_mips4400:
783 case bfd_mach_mips4600:
784 case bfd_mach_mips4650:
785 case bfd_mach_mips8000:
786 case bfd_mach_mips9000:
787 case bfd_mach_mips10000:
788 case bfd_mach_mips12000:
789 case bfd_mach_mips14000:
790 case bfd_mach_mips16000:
791 case bfd_mach_mips16:
792 case bfd_mach_mipsisa32:
793 case bfd_mach_mipsisa32r2:
794 case bfd_mach_mipsisa32r3:
795 case bfd_mach_mipsisa32r5:
796 case bfd_mach_mipsisa32r6:
797 case bfd_mach_mips5:
798 case bfd_mach_mipsisa64:
799 case bfd_mach_mipsisa64r2:
800 case bfd_mach_mipsisa64r3:
801 case bfd_mach_mipsisa64r5:
802 case bfd_mach_mipsisa64r6:
803 case bfd_mach_mips_sb1:
804 case bfd_mach_mips_xlr:
805 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
806 arch_flags = M_MIPS2;
807 break;
808 default:
809 arch_flags = M_UNKNOWN;
810 break;
811 }
812 break;
813
814 case bfd_arch_ns32k:
815 switch (machine)
816 {
817 case 0: arch_flags = M_NS32532; break;
818 case 32032: arch_flags = M_NS32032; break;
819 case 32532: arch_flags = M_NS32532; break;
820 default: arch_flags = M_UNKNOWN; break;
821 }
822 break;
823
824 case bfd_arch_vax:
825 *unknown = FALSE;
826 break;
827
828 case bfd_arch_cris:
829 if (machine == 0 || machine == 255)
830 arch_flags = M_CRIS;
831 break;
832
833 case bfd_arch_m88k:
834 *unknown = FALSE;
835 break;
836
837 default:
838 arch_flags = M_UNKNOWN;
839 }
840
841 if (arch_flags != M_UNKNOWN)
842 *unknown = FALSE;
843
844 return arch_flags;
845 }
846
847 /*
848 FUNCTION
849 aout_@var{size}_set_arch_mach
850
851 SYNOPSIS
852 bfd_boolean aout_@var{size}_set_arch_mach,
853 (bfd *,
854 enum bfd_architecture arch,
855 unsigned long machine);
856
857 DESCRIPTION
858 Set the architecture and the machine of the BFD @var{abfd} to the
859 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
860 can support the architecture required.
861 */
862
863 bfd_boolean
864 NAME (aout, set_arch_mach) (bfd *abfd,
865 enum bfd_architecture arch,
866 unsigned long machine)
867 {
868 if (! bfd_default_set_arch_mach (abfd, arch, machine))
869 return FALSE;
870
871 if (arch != bfd_arch_unknown)
872 {
873 bfd_boolean unknown;
874
875 NAME (aout, machine_type) (arch, machine, &unknown);
876 if (unknown)
877 return FALSE;
878 }
879
880 /* Determine the size of a relocation entry. */
881 switch (arch)
882 {
883 case bfd_arch_sparc:
884 case bfd_arch_mips:
885 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
886 break;
887 default:
888 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
889 break;
890 }
891
892 return (*aout_backend_info (abfd)->set_sizes) (abfd);
893 }
894
895 static void
896 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
897 {
898 file_ptr pos = adata (abfd).exec_bytes_size;
899 bfd_vma vma = 0;
900 int pad = 0;
901
902 /* Text. */
903 obj_textsec (abfd)->filepos = pos;
904 if (!obj_textsec (abfd)->user_set_vma)
905 obj_textsec (abfd)->vma = vma;
906 else
907 vma = obj_textsec (abfd)->vma;
908
909 pos += obj_textsec (abfd)->size;
910 vma += obj_textsec (abfd)->size;
911
912 /* Data. */
913 if (!obj_datasec (abfd)->user_set_vma)
914 {
915 obj_textsec (abfd)->size += pad;
916 pos += pad;
917 vma += pad;
918 obj_datasec (abfd)->vma = vma;
919 }
920 else
921 vma = obj_datasec (abfd)->vma;
922 obj_datasec (abfd)->filepos = pos;
923 pos += obj_datasec (abfd)->size;
924 vma += obj_datasec (abfd)->size;
925
926 /* BSS. */
927 if (!obj_bsssec (abfd)->user_set_vma)
928 {
929 obj_datasec (abfd)->size += pad;
930 pos += pad;
931 vma += pad;
932 obj_bsssec (abfd)->vma = vma;
933 }
934 else
935 {
936 /* The VMA of the .bss section is set by the VMA of the
937 .data section plus the size of the .data section. We may
938 need to add padding bytes to make this true. */
939 pad = obj_bsssec (abfd)->vma - vma;
940 if (pad > 0)
941 {
942 obj_datasec (abfd)->size += pad;
943 pos += pad;
944 }
945 }
946 obj_bsssec (abfd)->filepos = pos;
947
948 /* Fix up the exec header. */
949 execp->a_text = obj_textsec (abfd)->size;
950 execp->a_data = obj_datasec (abfd)->size;
951 execp->a_bss = obj_bsssec (abfd)->size;
952 N_SET_MAGIC (*execp, OMAGIC);
953 }
954
955 static void
956 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
957 {
958 bfd_size_type data_pad, text_pad;
959 file_ptr text_end;
960 const struct aout_backend_data *abdp;
961 /* TRUE if text includes exec header. */
962 bfd_boolean ztih;
963
964 abdp = aout_backend_info (abfd);
965
966 /* Text. */
967 ztih = (abdp != NULL
968 && (abdp->text_includes_header
969 || obj_aout_subformat (abfd) == q_magic_format));
970 obj_textsec (abfd)->filepos = (ztih
971 ? adata (abfd).exec_bytes_size
972 : adata (abfd).zmagic_disk_block_size);
973 if (! obj_textsec (abfd)->user_set_vma)
974 {
975 /* ?? Do we really need to check for relocs here? */
976 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
977 ? 0
978 : (ztih
979 ? (abdp->default_text_vma
980 + adata (abfd).exec_bytes_size)
981 : abdp->default_text_vma));
982 text_pad = 0;
983 }
984 else
985 {
986 /* The .text section is being loaded at an unusual address. We
987 may need to pad it such that the .data section starts at a page
988 boundary. */
989 if (ztih)
990 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
991 & (adata (abfd).page_size - 1));
992 else
993 text_pad = ((- obj_textsec (abfd)->vma)
994 & (adata (abfd).page_size - 1));
995 }
996
997 /* Find start of data. */
998 if (ztih)
999 {
1000 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
1001 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1002 }
1003 else
1004 {
1005 /* Note that if page_size == zmagic_disk_block_size, then
1006 filepos == page_size, and this case is the same as the ztih
1007 case. */
1008 text_end = obj_textsec (abfd)->size;
1009 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1010 text_end += obj_textsec (abfd)->filepos;
1011 }
1012 obj_textsec (abfd)->size += text_pad;
1013 text_end += text_pad;
1014
1015 /* Data. */
1016 if (!obj_datasec (abfd)->user_set_vma)
1017 {
1018 bfd_vma vma;
1019 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1020 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1021 }
1022 if (abdp && abdp->zmagic_mapped_contiguous)
1023 {
1024 asection * text = obj_textsec (abfd);
1025 asection * data = obj_datasec (abfd);
1026
1027 text_pad = data->vma - (text->vma + text->size);
1028 /* Only pad the text section if the data
1029 section is going to be placed after it. */
1030 if (text_pad > 0)
1031 text->size += text_pad;
1032 }
1033 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1034 + obj_textsec (abfd)->size);
1035
1036 /* Fix up exec header while we're at it. */
1037 execp->a_text = obj_textsec (abfd)->size;
1038 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1039 execp->a_text += adata (abfd).exec_bytes_size;
1040 if (obj_aout_subformat (abfd) == q_magic_format)
1041 N_SET_MAGIC (*execp, QMAGIC);
1042 else
1043 N_SET_MAGIC (*execp, ZMAGIC);
1044
1045 /* Spec says data section should be rounded up to page boundary. */
1046 obj_datasec (abfd)->size
1047 = align_power (obj_datasec (abfd)->size,
1048 obj_bsssec (abfd)->alignment_power);
1049 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1050 adata (abfd).page_size);
1051 data_pad = execp->a_data - obj_datasec (abfd)->size;
1052
1053 /* BSS. */
1054 if (!obj_bsssec (abfd)->user_set_vma)
1055 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1056 + obj_datasec (abfd)->size);
1057 /* If the BSS immediately follows the data section and extra space
1058 in the page is left after the data section, fudge data
1059 in the header so that the bss section looks smaller by that
1060 amount. We'll start the bss section there, and lie to the OS.
1061 (Note that a linker script, as well as the above assignment,
1062 could have explicitly set the BSS vma to immediately follow
1063 the data section.) */
1064 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1065 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1066 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1067 ? 0 : obj_bsssec (abfd)->size - data_pad);
1068 else
1069 execp->a_bss = obj_bsssec (abfd)->size;
1070 }
1071
1072 static void
1073 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1074 {
1075 file_ptr pos = adata (abfd).exec_bytes_size;
1076 bfd_vma vma = 0;
1077 int pad;
1078
1079 /* Text. */
1080 obj_textsec (abfd)->filepos = pos;
1081 if (!obj_textsec (abfd)->user_set_vma)
1082 obj_textsec (abfd)->vma = vma;
1083 else
1084 vma = obj_textsec (abfd)->vma;
1085 pos += obj_textsec (abfd)->size;
1086 vma += obj_textsec (abfd)->size;
1087
1088 /* Data. */
1089 obj_datasec (abfd)->filepos = pos;
1090 if (!obj_datasec (abfd)->user_set_vma)
1091 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1092 vma = obj_datasec (abfd)->vma;
1093
1094 /* Since BSS follows data immediately, see if it needs alignment. */
1095 vma += obj_datasec (abfd)->size;
1096 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1097 obj_datasec (abfd)->size += pad;
1098 pos += obj_datasec (abfd)->size;
1099
1100 /* BSS. */
1101 if (!obj_bsssec (abfd)->user_set_vma)
1102 obj_bsssec (abfd)->vma = vma;
1103 else
1104 vma = obj_bsssec (abfd)->vma;
1105
1106 /* Fix up exec header. */
1107 execp->a_text = obj_textsec (abfd)->size;
1108 execp->a_data = obj_datasec (abfd)->size;
1109 execp->a_bss = obj_bsssec (abfd)->size;
1110 N_SET_MAGIC (*execp, NMAGIC);
1111 }
1112
1113 bfd_boolean
1114 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1115 bfd_size_type *text_size,
1116 file_ptr *text_end ATTRIBUTE_UNUSED)
1117 {
1118 struct internal_exec *execp = exec_hdr (abfd);
1119
1120 if (! NAME (aout, make_sections) (abfd))
1121 return FALSE;
1122
1123 if (adata (abfd).magic != undecided_magic)
1124 return TRUE;
1125
1126 obj_textsec (abfd)->size =
1127 align_power (obj_textsec (abfd)->size,
1128 obj_textsec (abfd)->alignment_power);
1129
1130 *text_size = obj_textsec (abfd)->size;
1131 /* Rule (heuristic) for when to pad to a new page. Note that there
1132 are (at least) two ways demand-paged (ZMAGIC) files have been
1133 handled. Most Berkeley-based systems start the text segment at
1134 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1135 segment right after the exec header; the latter is counted in the
1136 text segment size, and is paged in by the kernel with the rest of
1137 the text. */
1138
1139 /* This perhaps isn't the right way to do this, but made it simpler for me
1140 to understand enough to implement it. Better would probably be to go
1141 right from BFD flags to alignment/positioning characteristics. But the
1142 old code was sloppy enough about handling the flags, and had enough
1143 other magic, that it was a little hard for me to understand. I think
1144 I understand it better now, but I haven't time to do the cleanup this
1145 minute. */
1146
1147 if (abfd->flags & D_PAGED)
1148 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1149 adata (abfd).magic = z_magic;
1150 else if (abfd->flags & WP_TEXT)
1151 adata (abfd).magic = n_magic;
1152 else
1153 adata (abfd).magic = o_magic;
1154
1155 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1156 #if __GNUC__ >= 2
1157 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1158 ({ char *str;
1159 switch (adata (abfd).magic)
1160 {
1161 case n_magic: str = "NMAGIC"; break;
1162 case o_magic: str = "OMAGIC"; break;
1163 case z_magic: str = "ZMAGIC"; break;
1164 default: abort ();
1165 }
1166 str;
1167 }),
1168 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1169 obj_textsec (abfd)->alignment_power,
1170 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1171 obj_datasec (abfd)->alignment_power,
1172 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1173 obj_bsssec (abfd)->alignment_power);
1174 #endif
1175 #endif
1176
1177 switch (adata (abfd).magic)
1178 {
1179 case o_magic:
1180 adjust_o_magic (abfd, execp);
1181 break;
1182 case z_magic:
1183 adjust_z_magic (abfd, execp);
1184 break;
1185 case n_magic:
1186 adjust_n_magic (abfd, execp);
1187 break;
1188 default:
1189 abort ();
1190 }
1191
1192 #ifdef BFD_AOUT_DEBUG
1193 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1194 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1195 obj_textsec (abfd)->filepos,
1196 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1197 obj_datasec (abfd)->filepos,
1198 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1199 #endif
1200
1201 return TRUE;
1202 }
1203
1204 /*
1205 FUNCTION
1206 aout_@var{size}_new_section_hook
1207
1208 SYNOPSIS
1209 bfd_boolean aout_@var{size}_new_section_hook,
1210 (bfd *abfd,
1211 asection *newsect);
1212
1213 DESCRIPTION
1214 Called by the BFD in response to a @code{bfd_make_section}
1215 request.
1216 */
1217 bfd_boolean
1218 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1219 {
1220 /* Align to double at least. */
1221 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1222
1223 if (bfd_get_format (abfd) == bfd_object)
1224 {
1225 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1226 {
1227 obj_textsec (abfd)= newsect;
1228 newsect->target_index = N_TEXT;
1229 }
1230 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1231 {
1232 obj_datasec (abfd) = newsect;
1233 newsect->target_index = N_DATA;
1234 }
1235 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1236 {
1237 obj_bsssec (abfd) = newsect;
1238 newsect->target_index = N_BSS;
1239 }
1240 }
1241
1242 /* We allow more than three sections internally. */
1243 return _bfd_generic_new_section_hook (abfd, newsect);
1244 }
1245
1246 bfd_boolean
1247 NAME (aout, set_section_contents) (bfd *abfd,
1248 sec_ptr section,
1249 const void * location,
1250 file_ptr offset,
1251 bfd_size_type count)
1252 {
1253 file_ptr text_end;
1254 bfd_size_type text_size;
1255
1256 if (! abfd->output_has_begun)
1257 {
1258 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1259 return FALSE;
1260 }
1261
1262 if (section == obj_bsssec (abfd))
1263 {
1264 bfd_set_error (bfd_error_no_contents);
1265 return FALSE;
1266 }
1267
1268 if (section != obj_textsec (abfd)
1269 && section != obj_datasec (abfd))
1270 {
1271 if (aout_section_merge_with_text_p (abfd, section))
1272 section->filepos = obj_textsec (abfd)->filepos +
1273 (section->vma - obj_textsec (abfd)->vma);
1274 else
1275 {
1276 (*_bfd_error_handler)
1277 (_("%s: can not represent section `%s' in a.out object file format"),
1278 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1279 bfd_set_error (bfd_error_nonrepresentable_section);
1280 return FALSE;
1281 }
1282 }
1283
1284 if (count != 0)
1285 {
1286 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1287 || bfd_bwrite (location, count, abfd) != count)
1288 return FALSE;
1289 }
1290
1291 return TRUE;
1292 }
1293 \f
1294 /* Read the external symbols from an a.out file. */
1295
1296 static bfd_boolean
1297 aout_get_external_symbols (bfd *abfd)
1298 {
1299 if (obj_aout_external_syms (abfd) == NULL)
1300 {
1301 bfd_size_type count;
1302 struct external_nlist *syms;
1303
1304 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1305 if (count == 0)
1306 return TRUE; /* Nothing to do. */
1307
1308 #ifdef USE_MMAP
1309 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1310 exec_hdr (abfd)->a_syms,
1311 &obj_aout_sym_window (abfd), TRUE))
1312 return FALSE;
1313 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1314 #else
1315 /* We allocate using malloc to make the values easy to free
1316 later on. If we put them on the objalloc it might not be
1317 possible to free them. */
1318 syms = (struct external_nlist *) bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1319 if (syms == NULL)
1320 return FALSE;
1321
1322 {
1323 bfd_size_type amt;
1324 amt = exec_hdr (abfd)->a_syms;
1325 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1326 || bfd_bread (syms, amt, abfd) != amt)
1327 {
1328 free (syms);
1329 return FALSE;
1330 }
1331 }
1332 #endif
1333
1334 obj_aout_external_syms (abfd) = syms;
1335 obj_aout_external_sym_count (abfd) = count;
1336 }
1337
1338 if (obj_aout_external_strings (abfd) == NULL
1339 && exec_hdr (abfd)->a_syms != 0)
1340 {
1341 unsigned char string_chars[BYTES_IN_WORD];
1342 bfd_size_type stringsize;
1343 char *strings;
1344 bfd_size_type amt = BYTES_IN_WORD;
1345
1346 /* Get the size of the strings. */
1347 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1348 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1349 return FALSE;
1350 stringsize = GET_WORD (abfd, string_chars);
1351
1352 #ifdef USE_MMAP
1353 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1354 &obj_aout_string_window (abfd), TRUE))
1355 return FALSE;
1356 strings = (char *) obj_aout_string_window (abfd).data;
1357 #else
1358 strings = (char *) bfd_malloc (stringsize + 1);
1359 if (strings == NULL)
1360 return FALSE;
1361
1362 /* Skip space for the string count in the buffer for convenience
1363 when using indexes. */
1364 amt = stringsize - BYTES_IN_WORD;
1365 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1366 {
1367 free (strings);
1368 return FALSE;
1369 }
1370 #endif
1371
1372 /* Ensure that a zero index yields an empty string. */
1373 strings[0] = '\0';
1374
1375 strings[stringsize - 1] = 0;
1376
1377 obj_aout_external_strings (abfd) = strings;
1378 obj_aout_external_string_size (abfd) = stringsize;
1379 }
1380
1381 return TRUE;
1382 }
1383
1384 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1385 and symbol->value fields of CACHE_PTR will be set from the a.out
1386 nlist structure. This function is responsible for setting
1387 symbol->flags and symbol->section, and adjusting symbol->value. */
1388
1389 static bfd_boolean
1390 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1391 {
1392 flagword visible;
1393
1394 if ((cache_ptr->type & N_STAB) != 0
1395 || cache_ptr->type == N_FN)
1396 {
1397 asection *sec;
1398
1399 /* This is a debugging symbol. */
1400 cache_ptr->symbol.flags = BSF_DEBUGGING;
1401
1402 /* Work out the symbol section. */
1403 switch (cache_ptr->type & N_TYPE)
1404 {
1405 case N_TEXT:
1406 case N_FN:
1407 sec = obj_textsec (abfd);
1408 break;
1409 case N_DATA:
1410 sec = obj_datasec (abfd);
1411 break;
1412 case N_BSS:
1413 sec = obj_bsssec (abfd);
1414 break;
1415 default:
1416 case N_ABS:
1417 sec = bfd_abs_section_ptr;
1418 break;
1419 }
1420
1421 cache_ptr->symbol.section = sec;
1422 cache_ptr->symbol.value -= sec->vma;
1423
1424 return TRUE;
1425 }
1426
1427 /* Get the default visibility. This does not apply to all types, so
1428 we just hold it in a local variable to use if wanted. */
1429 if ((cache_ptr->type & N_EXT) == 0)
1430 visible = BSF_LOCAL;
1431 else
1432 visible = BSF_GLOBAL;
1433
1434 switch (cache_ptr->type)
1435 {
1436 default:
1437 case N_ABS: case N_ABS | N_EXT:
1438 cache_ptr->symbol.section = bfd_abs_section_ptr;
1439 cache_ptr->symbol.flags = visible;
1440 break;
1441
1442 case N_UNDF | N_EXT:
1443 if (cache_ptr->symbol.value != 0)
1444 {
1445 /* This is a common symbol. */
1446 cache_ptr->symbol.flags = BSF_GLOBAL;
1447 cache_ptr->symbol.section = bfd_com_section_ptr;
1448 }
1449 else
1450 {
1451 cache_ptr->symbol.flags = 0;
1452 cache_ptr->symbol.section = bfd_und_section_ptr;
1453 }
1454 break;
1455
1456 case N_TEXT: case N_TEXT | N_EXT:
1457 cache_ptr->symbol.section = obj_textsec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1460 break;
1461
1462 /* N_SETV symbols used to represent set vectors placed in the
1463 data section. They are no longer generated. Theoretically,
1464 it was possible to extract the entries and combine them with
1465 new ones, although I don't know if that was ever actually
1466 done. Unless that feature is restored, treat them as data
1467 symbols. */
1468 case N_SETV: case N_SETV | N_EXT:
1469 case N_DATA: case N_DATA | N_EXT:
1470 cache_ptr->symbol.section = obj_datasec (abfd);
1471 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1472 cache_ptr->symbol.flags = visible;
1473 break;
1474
1475 case N_BSS: case N_BSS | N_EXT:
1476 cache_ptr->symbol.section = obj_bsssec (abfd);
1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1478 cache_ptr->symbol.flags = visible;
1479 break;
1480
1481 case N_SETA: case N_SETA | N_EXT:
1482 case N_SETT: case N_SETT | N_EXT:
1483 case N_SETD: case N_SETD | N_EXT:
1484 case N_SETB: case N_SETB | N_EXT:
1485 {
1486 /* This code is no longer needed. It used to be used to make
1487 the linker handle set symbols, but they are now handled in
1488 the add_symbols routine instead. */
1489 switch (cache_ptr->type & N_TYPE)
1490 {
1491 case N_SETA:
1492 cache_ptr->symbol.section = bfd_abs_section_ptr;
1493 break;
1494 case N_SETT:
1495 cache_ptr->symbol.section = obj_textsec (abfd);
1496 break;
1497 case N_SETD:
1498 cache_ptr->symbol.section = obj_datasec (abfd);
1499 break;
1500 case N_SETB:
1501 cache_ptr->symbol.section = obj_bsssec (abfd);
1502 break;
1503 }
1504
1505 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1506 }
1507 break;
1508
1509 case N_WARNING:
1510 /* This symbol is the text of a warning message. The next
1511 symbol is the symbol to associate the warning with. If a
1512 reference is made to that symbol, a warning is issued. */
1513 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1514 cache_ptr->symbol.section = bfd_abs_section_ptr;
1515 break;
1516
1517 case N_INDR: case N_INDR | N_EXT:
1518 /* An indirect symbol. This consists of two symbols in a row.
1519 The first symbol is the name of the indirection. The second
1520 symbol is the name of the target. A reference to the first
1521 symbol becomes a reference to the second. */
1522 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1523 cache_ptr->symbol.section = bfd_ind_section_ptr;
1524 break;
1525
1526 case N_WEAKU:
1527 cache_ptr->symbol.section = bfd_und_section_ptr;
1528 cache_ptr->symbol.flags = BSF_WEAK;
1529 break;
1530
1531 case N_WEAKA:
1532 cache_ptr->symbol.section = bfd_abs_section_ptr;
1533 cache_ptr->symbol.flags = BSF_WEAK;
1534 break;
1535
1536 case N_WEAKT:
1537 cache_ptr->symbol.section = obj_textsec (abfd);
1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1539 cache_ptr->symbol.flags = BSF_WEAK;
1540 break;
1541
1542 case N_WEAKD:
1543 cache_ptr->symbol.section = obj_datasec (abfd);
1544 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1545 cache_ptr->symbol.flags = BSF_WEAK;
1546 break;
1547
1548 case N_WEAKB:
1549 cache_ptr->symbol.section = obj_bsssec (abfd);
1550 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1551 cache_ptr->symbol.flags = BSF_WEAK;
1552 break;
1553 }
1554
1555 return TRUE;
1556 }
1557
1558 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1559
1560 static bfd_boolean
1561 translate_to_native_sym_flags (bfd *abfd,
1562 asymbol *cache_ptr,
1563 struct external_nlist *sym_pointer)
1564 {
1565 bfd_vma value = cache_ptr->value;
1566 asection *sec;
1567 bfd_vma off;
1568
1569 /* Mask out any existing type bits in case copying from one section
1570 to another. */
1571 sym_pointer->e_type[0] &= ~N_TYPE;
1572
1573 sec = bfd_get_section (cache_ptr);
1574 off = 0;
1575
1576 if (sec == NULL)
1577 {
1578 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1579 file. */
1580 (*_bfd_error_handler)
1581 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1582 bfd_get_filename (abfd),
1583 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1584 bfd_set_error (bfd_error_nonrepresentable_section);
1585 return FALSE;
1586 }
1587
1588 if (sec->output_section != NULL)
1589 {
1590 off = sec->output_offset;
1591 sec = sec->output_section;
1592 }
1593
1594 if (bfd_is_abs_section (sec))
1595 sym_pointer->e_type[0] |= N_ABS;
1596 else if (sec == obj_textsec (abfd))
1597 sym_pointer->e_type[0] |= N_TEXT;
1598 else if (sec == obj_datasec (abfd))
1599 sym_pointer->e_type[0] |= N_DATA;
1600 else if (sec == obj_bsssec (abfd))
1601 sym_pointer->e_type[0] |= N_BSS;
1602 else if (bfd_is_und_section (sec))
1603 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1604 else if (bfd_is_ind_section (sec))
1605 sym_pointer->e_type[0] = N_INDR;
1606 else if (bfd_is_com_section (sec))
1607 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1608 else
1609 {
1610 if (aout_section_merge_with_text_p (abfd, sec))
1611 sym_pointer->e_type[0] |= N_TEXT;
1612 else
1613 {
1614 (*_bfd_error_handler)
1615 (_("%s: can not represent section `%s' in a.out object file format"),
1616 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1617 bfd_set_error (bfd_error_nonrepresentable_section);
1618 return FALSE;
1619 }
1620 }
1621
1622 /* Turn the symbol from section relative to absolute again. */
1623 value += sec->vma + off;
1624
1625 if ((cache_ptr->flags & BSF_WARNING) != 0)
1626 sym_pointer->e_type[0] = N_WARNING;
1627
1628 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1629 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1630 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1631 sym_pointer->e_type[0] |= N_EXT;
1632 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1633 sym_pointer->e_type[0] &= ~N_EXT;
1634
1635 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1636 {
1637 int type = ((aout_symbol_type *) cache_ptr)->type;
1638
1639 switch (type)
1640 {
1641 case N_ABS: type = N_SETA; break;
1642 case N_TEXT: type = N_SETT; break;
1643 case N_DATA: type = N_SETD; break;
1644 case N_BSS: type = N_SETB; break;
1645 }
1646 sym_pointer->e_type[0] = type;
1647 }
1648
1649 if ((cache_ptr->flags & BSF_WEAK) != 0)
1650 {
1651 int type;
1652
1653 switch (sym_pointer->e_type[0] & N_TYPE)
1654 {
1655 default:
1656 case N_ABS: type = N_WEAKA; break;
1657 case N_TEXT: type = N_WEAKT; break;
1658 case N_DATA: type = N_WEAKD; break;
1659 case N_BSS: type = N_WEAKB; break;
1660 case N_UNDF: type = N_WEAKU; break;
1661 }
1662 sym_pointer->e_type[0] = type;
1663 }
1664
1665 PUT_WORD (abfd, value, sym_pointer->e_value);
1666
1667 return TRUE;
1668 }
1669 \f
1670 /* Native-level interface to symbols. */
1671
1672 asymbol *
1673 NAME (aout, make_empty_symbol) (bfd *abfd)
1674 {
1675 bfd_size_type amt = sizeof (aout_symbol_type);
1676
1677 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1678 if (!new_symbol)
1679 return NULL;
1680 new_symbol->symbol.the_bfd = abfd;
1681
1682 return &new_symbol->symbol;
1683 }
1684
1685 /* Translate a set of internal symbols into external symbols. */
1686
1687 bfd_boolean
1688 NAME (aout, translate_symbol_table) (bfd *abfd,
1689 aout_symbol_type *in,
1690 struct external_nlist *ext,
1691 bfd_size_type count,
1692 char *str,
1693 bfd_size_type strsize,
1694 bfd_boolean dynamic)
1695 {
1696 struct external_nlist *ext_end;
1697
1698 ext_end = ext + count;
1699 for (; ext < ext_end; ext++, in++)
1700 {
1701 bfd_vma x;
1702
1703 x = GET_WORD (abfd, ext->e_strx);
1704 in->symbol.the_bfd = abfd;
1705
1706 /* For the normal symbols, the zero index points at the number
1707 of bytes in the string table but is to be interpreted as the
1708 null string. For the dynamic symbols, the number of bytes in
1709 the string table is stored in the __DYNAMIC structure and the
1710 zero index points at an actual string. */
1711 if (x == 0 && ! dynamic)
1712 in->symbol.name = "";
1713 else if (x < strsize)
1714 in->symbol.name = str + x;
1715 else
1716 return FALSE;
1717
1718 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1719 in->desc = H_GET_16 (abfd, ext->e_desc);
1720 in->other = H_GET_8 (abfd, ext->e_other);
1721 in->type = H_GET_8 (abfd, ext->e_type);
1722 in->symbol.udata.p = NULL;
1723
1724 if (! translate_from_native_sym_flags (abfd, in))
1725 return FALSE;
1726
1727 if (dynamic)
1728 in->symbol.flags |= BSF_DYNAMIC;
1729 }
1730
1731 return TRUE;
1732 }
1733
1734 /* We read the symbols into a buffer, which is discarded when this
1735 function exits. We read the strings into a buffer large enough to
1736 hold them all plus all the cached symbol entries. */
1737
1738 bfd_boolean
1739 NAME (aout, slurp_symbol_table) (bfd *abfd)
1740 {
1741 struct external_nlist *old_external_syms;
1742 aout_symbol_type *cached;
1743 bfd_size_type cached_size;
1744
1745 /* If there's no work to be done, don't do any. */
1746 if (obj_aout_symbols (abfd) != NULL)
1747 return TRUE;
1748
1749 old_external_syms = obj_aout_external_syms (abfd);
1750
1751 if (! aout_get_external_symbols (abfd))
1752 return FALSE;
1753
1754 cached_size = obj_aout_external_sym_count (abfd);
1755 if (cached_size == 0)
1756 return TRUE; /* Nothing to do. */
1757
1758 cached_size *= sizeof (aout_symbol_type);
1759 if (cached_size >= (bfd_size_type) bfd_get_size (abfd))
1760 return FALSE;
1761 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1762 if (cached == NULL)
1763 return FALSE;
1764
1765 /* Convert from external symbol information to internal. */
1766 if (! (NAME (aout, translate_symbol_table)
1767 (abfd, cached,
1768 obj_aout_external_syms (abfd),
1769 obj_aout_external_sym_count (abfd),
1770 obj_aout_external_strings (abfd),
1771 obj_aout_external_string_size (abfd),
1772 FALSE)))
1773 {
1774 free (cached);
1775 return FALSE;
1776 }
1777
1778 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1779
1780 obj_aout_symbols (abfd) = cached;
1781
1782 /* It is very likely that anybody who calls this function will not
1783 want the external symbol information, so if it was allocated
1784 because of our call to aout_get_external_symbols, we free it up
1785 right away to save space. */
1786 if (old_external_syms == NULL
1787 && obj_aout_external_syms (abfd) != NULL)
1788 {
1789 #ifdef USE_MMAP
1790 bfd_free_window (&obj_aout_sym_window (abfd));
1791 #else
1792 free (obj_aout_external_syms (abfd));
1793 #endif
1794 obj_aout_external_syms (abfd) = NULL;
1795 }
1796
1797 return TRUE;
1798 }
1799 \f
1800 /* We use a hash table when writing out symbols so that we only write
1801 out a particular string once. This helps particularly when the
1802 linker writes out stabs debugging entries, because each different
1803 contributing object file tends to have many duplicate stabs
1804 strings.
1805
1806 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1807 if BFD_TRADITIONAL_FORMAT is set. */
1808
1809 /* Get the index of a string in a strtab, adding it if it is not
1810 already present. */
1811
1812 static inline bfd_size_type
1813 add_to_stringtab (bfd *abfd,
1814 struct bfd_strtab_hash *tab,
1815 const char *str,
1816 bfd_boolean copy)
1817 {
1818 bfd_boolean hash;
1819 bfd_size_type str_index;
1820
1821 /* An index of 0 always means the empty string. */
1822 if (str == 0 || *str == '\0')
1823 return 0;
1824
1825 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1826 doesn't understand a hashed string table. */
1827 hash = TRUE;
1828 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1829 hash = FALSE;
1830
1831 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1832
1833 if (str_index != (bfd_size_type) -1)
1834 /* Add BYTES_IN_WORD to the return value to account for the
1835 space taken up by the string table size. */
1836 str_index += BYTES_IN_WORD;
1837
1838 return str_index;
1839 }
1840
1841 /* Write out a strtab. ABFD is already at the right location in the
1842 file. */
1843
1844 static bfd_boolean
1845 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1846 {
1847 bfd_byte buffer[BYTES_IN_WORD];
1848 bfd_size_type amt = BYTES_IN_WORD;
1849
1850 /* The string table starts with the size. */
1851 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1852 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1853 return FALSE;
1854
1855 return _bfd_stringtab_emit (abfd, tab);
1856 }
1857 \f
1858 bfd_boolean
1859 NAME (aout, write_syms) (bfd *abfd)
1860 {
1861 unsigned int count ;
1862 asymbol **generic = bfd_get_outsymbols (abfd);
1863 struct bfd_strtab_hash *strtab;
1864
1865 strtab = _bfd_stringtab_init ();
1866 if (strtab == NULL)
1867 return FALSE;
1868
1869 for (count = 0; count < bfd_get_symcount (abfd); count++)
1870 {
1871 asymbol *g = generic[count];
1872 bfd_size_type indx;
1873 struct external_nlist nsp;
1874 bfd_size_type amt;
1875
1876 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1877 if (indx == (bfd_size_type) -1)
1878 goto error_return;
1879 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1880
1881 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1882 {
1883 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1884 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1885 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1886 }
1887 else
1888 {
1889 H_PUT_16 (abfd, 0, nsp.e_desc);
1890 H_PUT_8 (abfd, 0, nsp.e_other);
1891 H_PUT_8 (abfd, 0, nsp.e_type);
1892 }
1893
1894 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1895 goto error_return;
1896
1897 amt = EXTERNAL_NLIST_SIZE;
1898 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1899 goto error_return;
1900
1901 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1902 here, at the end. */
1903 g->KEEPIT = count;
1904 }
1905
1906 if (! emit_stringtab (abfd, strtab))
1907 goto error_return;
1908
1909 _bfd_stringtab_free (strtab);
1910
1911 return TRUE;
1912
1913 error_return:
1914 _bfd_stringtab_free (strtab);
1915 return FALSE;
1916 }
1917 \f
1918 long
1919 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1920 {
1921 unsigned int counter = 0;
1922 aout_symbol_type *symbase;
1923
1924 if (!NAME (aout, slurp_symbol_table) (abfd))
1925 return -1;
1926
1927 for (symbase = obj_aout_symbols (abfd);
1928 counter++ < bfd_get_symcount (abfd);
1929 )
1930 *(location++) = (asymbol *) (symbase++);
1931 *location++ =0;
1932 return bfd_get_symcount (abfd);
1933 }
1934 \f
1935 /* Standard reloc stuff. */
1936 /* Output standard relocation information to a file in target byte order. */
1937
1938 extern void NAME (aout, swap_std_reloc_out)
1939 (bfd *, arelent *, struct reloc_std_external *);
1940
1941 void
1942 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1943 arelent *g,
1944 struct reloc_std_external *natptr)
1945 {
1946 int r_index;
1947 asymbol *sym = *(g->sym_ptr_ptr);
1948 int r_extern;
1949 unsigned int r_length;
1950 int r_pcrel;
1951 int r_baserel, r_jmptable, r_relative;
1952 asection *output_section = sym->section->output_section;
1953
1954 PUT_WORD (abfd, g->address, natptr->r_address);
1955
1956 r_length = g->howto->size ; /* Size as a power of two. */
1957 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1958 /* XXX This relies on relocs coming from a.out files. */
1959 r_baserel = (g->howto->type & 8) != 0;
1960 r_jmptable = (g->howto->type & 16) != 0;
1961 r_relative = (g->howto->type & 32) != 0;
1962
1963 /* Name was clobbered by aout_write_syms to be symbol index. */
1964
1965 /* If this relocation is relative to a symbol then set the
1966 r_index to the symbols index, and the r_extern bit.
1967
1968 Absolute symbols can come in in two ways, either as an offset
1969 from the abs section, or as a symbol which has an abs value.
1970 check for that here. */
1971
1972 if (bfd_is_com_section (output_section)
1973 || bfd_is_abs_section (output_section)
1974 || bfd_is_und_section (output_section)
1975 /* PR gas/3041 a.out relocs against weak symbols
1976 must be treated as if they were against externs. */
1977 || (sym->flags & BSF_WEAK))
1978 {
1979 if (bfd_abs_section_ptr->symbol == sym)
1980 {
1981 /* Whoops, looked like an abs symbol, but is
1982 really an offset from the abs section. */
1983 r_index = N_ABS;
1984 r_extern = 0;
1985 }
1986 else
1987 {
1988 /* Fill in symbol. */
1989 r_extern = 1;
1990 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1991 }
1992 }
1993 else
1994 {
1995 /* Just an ordinary section. */
1996 r_extern = 0;
1997 r_index = output_section->target_index;
1998 }
1999
2000 /* Now the fun stuff. */
2001 if (bfd_header_big_endian (abfd))
2002 {
2003 natptr->r_index[0] = r_index >> 16;
2004 natptr->r_index[1] = r_index >> 8;
2005 natptr->r_index[2] = r_index;
2006 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2007 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2008 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2009 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2010 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2011 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2012 }
2013 else
2014 {
2015 natptr->r_index[2] = r_index >> 16;
2016 natptr->r_index[1] = r_index >> 8;
2017 natptr->r_index[0] = r_index;
2018 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2019 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2020 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2021 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2022 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2023 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2024 }
2025 }
2026
2027 /* Extended stuff. */
2028 /* Output extended relocation information to a file in target byte order. */
2029
2030 extern void NAME (aout, swap_ext_reloc_out)
2031 (bfd *, arelent *, struct reloc_ext_external *);
2032
2033 void
2034 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2035 arelent *g,
2036 struct reloc_ext_external *natptr)
2037 {
2038 int r_index;
2039 int r_extern;
2040 unsigned int r_type;
2041 bfd_vma r_addend;
2042 asymbol *sym = *(g->sym_ptr_ptr);
2043 asection *output_section = sym->section->output_section;
2044
2045 PUT_WORD (abfd, g->address, natptr->r_address);
2046
2047 r_type = (unsigned int) g->howto->type;
2048
2049 r_addend = g->addend;
2050 if ((sym->flags & BSF_SECTION_SYM) != 0)
2051 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2052
2053 /* If this relocation is relative to a symbol then set the
2054 r_index to the symbols index, and the r_extern bit.
2055
2056 Absolute symbols can come in in two ways, either as an offset
2057 from the abs section, or as a symbol which has an abs value.
2058 check for that here. */
2059 if (bfd_is_abs_section (bfd_get_section (sym)))
2060 {
2061 r_extern = 0;
2062 r_index = N_ABS;
2063 }
2064 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2065 {
2066 if (bfd_is_und_section (bfd_get_section (sym))
2067 || (sym->flags & BSF_GLOBAL) != 0)
2068 r_extern = 1;
2069 else
2070 r_extern = 0;
2071 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2072 }
2073 else
2074 {
2075 /* Just an ordinary section. */
2076 r_extern = 0;
2077 r_index = output_section->target_index;
2078 }
2079
2080 /* Now the fun stuff. */
2081 if (bfd_header_big_endian (abfd))
2082 {
2083 natptr->r_index[0] = r_index >> 16;
2084 natptr->r_index[1] = r_index >> 8;
2085 natptr->r_index[2] = r_index;
2086 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2087 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2088 }
2089 else
2090 {
2091 natptr->r_index[2] = r_index >> 16;
2092 natptr->r_index[1] = r_index >> 8;
2093 natptr->r_index[0] = r_index;
2094 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2095 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2096 }
2097
2098 PUT_WORD (abfd, r_addend, natptr->r_addend);
2099 }
2100
2101 /* BFD deals internally with all things based from the section they're
2102 in. so, something in 10 bytes into a text section with a base of
2103 50 would have a symbol (.text+10) and know .text vma was 50.
2104
2105 Aout keeps all it's symbols based from zero, so the symbol would
2106 contain 60. This macro subs the base of each section from the value
2107 to give the true offset from the section. */
2108
2109 #define MOVE_ADDRESS(ad) \
2110 if (r_extern) \
2111 { \
2112 /* Undefined symbol. */ \
2113 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2114 cache_ptr->addend = ad; \
2115 } \
2116 else \
2117 { \
2118 /* Defined, section relative. Replace symbol with pointer to \
2119 symbol which points to section. */ \
2120 switch (r_index) \
2121 { \
2122 case N_TEXT: \
2123 case N_TEXT | N_EXT: \
2124 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2125 cache_ptr->addend = ad - su->textsec->vma; \
2126 break; \
2127 case N_DATA: \
2128 case N_DATA | N_EXT: \
2129 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2130 cache_ptr->addend = ad - su->datasec->vma; \
2131 break; \
2132 case N_BSS: \
2133 case N_BSS | N_EXT: \
2134 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2135 cache_ptr->addend = ad - su->bsssec->vma; \
2136 break; \
2137 default: \
2138 case N_ABS: \
2139 case N_ABS | N_EXT: \
2140 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2141 cache_ptr->addend = ad; \
2142 break; \
2143 } \
2144 }
2145
2146 void
2147 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2148 struct reloc_ext_external *bytes,
2149 arelent *cache_ptr,
2150 asymbol **symbols,
2151 bfd_size_type symcount)
2152 {
2153 unsigned int r_index;
2154 int r_extern;
2155 unsigned int r_type;
2156 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2157
2158 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2159
2160 /* Now the fun stuff. */
2161 if (bfd_header_big_endian (abfd))
2162 {
2163 r_index = (((unsigned int) bytes->r_index[0] << 16)
2164 | ((unsigned int) bytes->r_index[1] << 8)
2165 | bytes->r_index[2]);
2166 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2167 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2168 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2169 }
2170 else
2171 {
2172 r_index = (((unsigned int) bytes->r_index[2] << 16)
2173 | ((unsigned int) bytes->r_index[1] << 8)
2174 | bytes->r_index[0]);
2175 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2176 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2177 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2178 }
2179
2180 if (r_type < TABLE_SIZE (howto_table_ext))
2181 cache_ptr->howto = howto_table_ext + r_type;
2182 else
2183 cache_ptr->howto = NULL;
2184
2185 /* Base relative relocs are always against the symbol table,
2186 regardless of the setting of r_extern. r_extern just reflects
2187 whether the symbol the reloc is against is local or global. */
2188 if (r_type == (unsigned int) RELOC_BASE10
2189 || r_type == (unsigned int) RELOC_BASE13
2190 || r_type == (unsigned int) RELOC_BASE22)
2191 r_extern = 1;
2192
2193 if (r_extern && r_index > symcount)
2194 {
2195 /* We could arrange to return an error, but it might be useful
2196 to see the file even if it is bad. */
2197 r_extern = 0;
2198 r_index = N_ABS;
2199 }
2200
2201 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2202 }
2203
2204 void
2205 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2206 struct reloc_std_external *bytes,
2207 arelent *cache_ptr,
2208 asymbol **symbols,
2209 bfd_size_type symcount)
2210 {
2211 unsigned int r_index;
2212 int r_extern;
2213 unsigned int r_length;
2214 int r_pcrel;
2215 int r_baserel, r_jmptable, r_relative;
2216 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2217 unsigned int howto_idx;
2218
2219 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2220
2221 /* Now the fun stuff. */
2222 if (bfd_header_big_endian (abfd))
2223 {
2224 r_index = (((unsigned int) bytes->r_index[0] << 16)
2225 | ((unsigned int) bytes->r_index[1] << 8)
2226 | bytes->r_index[2]);
2227 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2228 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2229 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2230 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2231 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2232 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2233 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2234 }
2235 else
2236 {
2237 r_index = (((unsigned int) bytes->r_index[2] << 16)
2238 | ((unsigned int) bytes->r_index[1] << 8)
2239 | bytes->r_index[0]);
2240 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2241 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2242 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2243 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2244 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2245 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2246 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2247 }
2248
2249 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2250 + 16 * r_jmptable + 32 * r_relative);
2251 if (howto_idx < TABLE_SIZE (howto_table_std))
2252 {
2253 cache_ptr->howto = howto_table_std + howto_idx;
2254 if (cache_ptr->howto->type == (unsigned int) -1)
2255 cache_ptr->howto = NULL;
2256 }
2257 else
2258 cache_ptr->howto = NULL;
2259
2260 /* Base relative relocs are always against the symbol table,
2261 regardless of the setting of r_extern. r_extern just reflects
2262 whether the symbol the reloc is against is local or global. */
2263 if (r_baserel)
2264 r_extern = 1;
2265
2266 if (r_extern && r_index > symcount)
2267 {
2268 /* We could arrange to return an error, but it might be useful
2269 to see the file even if it is bad. */
2270 r_extern = 0;
2271 r_index = N_ABS;
2272 }
2273
2274 MOVE_ADDRESS (0);
2275 }
2276
2277 /* Read and swap the relocs for a section. */
2278
2279 bfd_boolean
2280 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2281 {
2282 bfd_size_type count;
2283 bfd_size_type reloc_size;
2284 void * relocs;
2285 arelent *reloc_cache;
2286 size_t each_size;
2287 unsigned int counter = 0;
2288 arelent *cache_ptr;
2289 bfd_size_type amt;
2290
2291 if (asect->relocation)
2292 return TRUE;
2293
2294 if (asect->flags & SEC_CONSTRUCTOR)
2295 return TRUE;
2296
2297 if (asect == obj_datasec (abfd))
2298 reloc_size = exec_hdr (abfd)->a_drsize;
2299 else if (asect == obj_textsec (abfd))
2300 reloc_size = exec_hdr (abfd)->a_trsize;
2301 else if (asect == obj_bsssec (abfd))
2302 reloc_size = 0;
2303 else
2304 {
2305 bfd_set_error (bfd_error_invalid_operation);
2306 return FALSE;
2307 }
2308
2309 if (reloc_size == 0)
2310 return TRUE; /* Nothing to be done. */
2311
2312 /* PR binutils/17512: Do not even try to
2313 load the relocs if their size is corrupt. */
2314 if (reloc_size + asect->rel_filepos >= (bfd_size_type) bfd_get_size (abfd))
2315 return FALSE;
2316
2317 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2318 return FALSE;
2319
2320 each_size = obj_reloc_entry_size (abfd);
2321
2322 count = reloc_size / each_size;
2323 if (count == 0)
2324 return TRUE; /* Nothing to be done. */
2325
2326 amt = count * sizeof (arelent);
2327 reloc_cache = (arelent *) bfd_zmalloc (amt);
2328 if (reloc_cache == NULL)
2329 return FALSE;
2330
2331 relocs = bfd_malloc (reloc_size);
2332 if (relocs == NULL)
2333 {
2334 free (reloc_cache);
2335 return FALSE;
2336 }
2337
2338 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2339 {
2340 free (relocs);
2341 free (reloc_cache);
2342 return FALSE;
2343 }
2344
2345 cache_ptr = reloc_cache;
2346 if (each_size == RELOC_EXT_SIZE)
2347 {
2348 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2349
2350 for (; counter < count; counter++, rptr++, cache_ptr++)
2351 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2352 (bfd_size_type) bfd_get_symcount (abfd));
2353 }
2354 else
2355 {
2356 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2357
2358 for (; counter < count; counter++, rptr++, cache_ptr++)
2359 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2360 (bfd_size_type) bfd_get_symcount (abfd));
2361 }
2362
2363 free (relocs);
2364
2365 asect->relocation = reloc_cache;
2366 asect->reloc_count = cache_ptr - reloc_cache;
2367
2368 return TRUE;
2369 }
2370
2371 /* Write out a relocation section into an object file. */
2372
2373 bfd_boolean
2374 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2375 {
2376 arelent **generic;
2377 unsigned char *native, *natptr;
2378 size_t each_size;
2379
2380 unsigned int count = section->reloc_count;
2381 bfd_size_type natsize;
2382
2383 if (count == 0 || section->orelocation == NULL)
2384 return TRUE;
2385
2386 each_size = obj_reloc_entry_size (abfd);
2387 natsize = (bfd_size_type) each_size * count;
2388 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2389 if (!native)
2390 return FALSE;
2391
2392 generic = section->orelocation;
2393
2394 if (each_size == RELOC_EXT_SIZE)
2395 {
2396 for (natptr = native;
2397 count != 0;
2398 --count, natptr += each_size, ++generic)
2399 MY_swap_ext_reloc_out (abfd, *generic,
2400 (struct reloc_ext_external *) natptr);
2401 }
2402 else
2403 {
2404 for (natptr = native;
2405 count != 0;
2406 --count, natptr += each_size, ++generic)
2407 MY_swap_std_reloc_out (abfd, *generic,
2408 (struct reloc_std_external *) natptr);
2409 }
2410
2411 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2412 {
2413 bfd_release (abfd, native);
2414 return FALSE;
2415 }
2416 bfd_release (abfd, native);
2417
2418 return TRUE;
2419 }
2420
2421 /* This is stupid. This function should be a boolean predicate. */
2422
2423 long
2424 NAME (aout, canonicalize_reloc) (bfd *abfd,
2425 sec_ptr section,
2426 arelent **relptr,
2427 asymbol **symbols)
2428 {
2429 arelent *tblptr = section->relocation;
2430 unsigned int count;
2431
2432 if (section == obj_bsssec (abfd))
2433 {
2434 *relptr = NULL;
2435 return 0;
2436 }
2437
2438 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2439 return -1;
2440
2441 if (section->flags & SEC_CONSTRUCTOR)
2442 {
2443 arelent_chain *chain = section->constructor_chain;
2444 for (count = 0; count < section->reloc_count; count ++)
2445 {
2446 *relptr ++ = &chain->relent;
2447 chain = chain->next;
2448 }
2449 }
2450 else
2451 {
2452 tblptr = section->relocation;
2453
2454 for (count = 0; count++ < section->reloc_count; )
2455 {
2456 *relptr++ = tblptr++;
2457 }
2458 }
2459 *relptr = 0;
2460
2461 return section->reloc_count;
2462 }
2463
2464 long
2465 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2466 {
2467 if (bfd_get_format (abfd) != bfd_object)
2468 {
2469 bfd_set_error (bfd_error_invalid_operation);
2470 return -1;
2471 }
2472
2473 if (asect->flags & SEC_CONSTRUCTOR)
2474 return sizeof (arelent *) * (asect->reloc_count + 1);
2475
2476 if (asect == obj_datasec (abfd))
2477 return sizeof (arelent *)
2478 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2479 + 1);
2480
2481 if (asect == obj_textsec (abfd))
2482 return sizeof (arelent *)
2483 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2484 + 1);
2485
2486 if (asect == obj_bsssec (abfd))
2487 return sizeof (arelent *);
2488
2489 if (asect == obj_bsssec (abfd))
2490 return 0;
2491
2492 bfd_set_error (bfd_error_invalid_operation);
2493 return -1;
2494 }
2495 \f
2496 long
2497 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2498 {
2499 if (!NAME (aout, slurp_symbol_table) (abfd))
2500 return -1;
2501
2502 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2503 }
2504
2505 alent *
2506 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2507 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2508 {
2509 return NULL;
2510 }
2511
2512 void
2513 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2514 asymbol *symbol,
2515 symbol_info *ret)
2516 {
2517 bfd_symbol_info (symbol, ret);
2518
2519 if (ret->type == '?')
2520 {
2521 int type_code = aout_symbol (symbol)->type & 0xff;
2522 const char *stab_name = bfd_get_stab_name (type_code);
2523 static char buf[10];
2524
2525 if (stab_name == NULL)
2526 {
2527 sprintf (buf, "(%d)", type_code);
2528 stab_name = buf;
2529 }
2530 ret->type = '-';
2531 ret->stab_type = type_code;
2532 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2533 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2534 ret->stab_name = stab_name;
2535 }
2536 }
2537
2538 void
2539 NAME (aout, print_symbol) (bfd *abfd,
2540 void * afile,
2541 asymbol *symbol,
2542 bfd_print_symbol_type how)
2543 {
2544 FILE *file = (FILE *)afile;
2545
2546 switch (how)
2547 {
2548 case bfd_print_symbol_name:
2549 if (symbol->name)
2550 fprintf (file,"%s", symbol->name);
2551 break;
2552 case bfd_print_symbol_more:
2553 fprintf (file,"%4x %2x %2x",
2554 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2555 (unsigned) (aout_symbol (symbol)->other & 0xff),
2556 (unsigned) (aout_symbol (symbol)->type));
2557 break;
2558 case bfd_print_symbol_all:
2559 {
2560 const char *section_name = symbol->section->name;
2561
2562 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2563
2564 fprintf (file," %-5s %04x %02x %02x",
2565 section_name,
2566 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2567 (unsigned) (aout_symbol (symbol)->other & 0xff),
2568 (unsigned) (aout_symbol (symbol)->type & 0xff));
2569 if (symbol->name)
2570 fprintf (file," %s", symbol->name);
2571 }
2572 break;
2573 }
2574 }
2575
2576 /* If we don't have to allocate more than 1MB to hold the generic
2577 symbols, we use the generic minisymbol methord: it's faster, since
2578 it only translates the symbols once, not multiple times. */
2579 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2580
2581 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2582 symbols. The minisymbol_to_symbol function translates these into
2583 BFD asymbol structures. */
2584
2585 long
2586 NAME (aout, read_minisymbols) (bfd *abfd,
2587 bfd_boolean dynamic,
2588 void * *minisymsp,
2589 unsigned int *sizep)
2590 {
2591 if (dynamic)
2592 /* We could handle the dynamic symbols here as well, but it's
2593 easier to hand them off. */
2594 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2595
2596 if (! aout_get_external_symbols (abfd))
2597 return -1;
2598
2599 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2600 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2601
2602 *minisymsp = (void *) obj_aout_external_syms (abfd);
2603
2604 /* By passing the external symbols back from this routine, we are
2605 giving up control over the memory block. Clear
2606 obj_aout_external_syms, so that we do not try to free it
2607 ourselves. */
2608 obj_aout_external_syms (abfd) = NULL;
2609
2610 *sizep = EXTERNAL_NLIST_SIZE;
2611 return obj_aout_external_sym_count (abfd);
2612 }
2613
2614 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2615 unmodified a.out symbol. The SYM argument is a structure returned
2616 by bfd_make_empty_symbol, which we fill in here. */
2617
2618 asymbol *
2619 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2620 bfd_boolean dynamic,
2621 const void * minisym,
2622 asymbol *sym)
2623 {
2624 if (dynamic
2625 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2626 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2627
2628 memset (sym, 0, sizeof (aout_symbol_type));
2629
2630 /* We call translate_symbol_table to translate a single symbol. */
2631 if (! (NAME (aout, translate_symbol_table)
2632 (abfd,
2633 (aout_symbol_type *) sym,
2634 (struct external_nlist *) minisym,
2635 (bfd_size_type) 1,
2636 obj_aout_external_strings (abfd),
2637 obj_aout_external_string_size (abfd),
2638 FALSE)))
2639 return NULL;
2640
2641 return sym;
2642 }
2643
2644 /* Provided a BFD, a section and an offset into the section, calculate
2645 and return the name of the source file and the line nearest to the
2646 wanted location. */
2647
2648 bfd_boolean
2649 NAME (aout, find_nearest_line) (bfd *abfd,
2650 asymbol **symbols,
2651 asection *section,
2652 bfd_vma offset,
2653 const char **filename_ptr,
2654 const char **functionname_ptr,
2655 unsigned int *line_ptr,
2656 unsigned int *disriminator_ptr)
2657 {
2658 /* Run down the file looking for the filename, function and linenumber. */
2659 asymbol **p;
2660 const char *directory_name = NULL;
2661 const char *main_file_name = NULL;
2662 const char *current_file_name = NULL;
2663 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2664 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2665 bfd_vma low_line_vma = 0;
2666 bfd_vma low_func_vma = 0;
2667 asymbol *func = 0;
2668 bfd_size_type filelen, funclen;
2669 char *buf;
2670
2671 *filename_ptr = abfd->filename;
2672 *functionname_ptr = 0;
2673 *line_ptr = 0;
2674 if (disriminator_ptr)
2675 *disriminator_ptr = 0;
2676
2677 if (symbols != NULL)
2678 {
2679 for (p = symbols; *p; p++)
2680 {
2681 aout_symbol_type *q = (aout_symbol_type *) (*p);
2682 next:
2683 switch (q->type)
2684 {
2685 case N_TEXT:
2686 /* If this looks like a file name symbol, and it comes after
2687 the line number we have found so far, but before the
2688 offset, then we have probably not found the right line
2689 number. */
2690 if (q->symbol.value <= offset
2691 && ((q->symbol.value > low_line_vma
2692 && (line_file_name != NULL
2693 || *line_ptr != 0))
2694 || (q->symbol.value > low_func_vma
2695 && func != NULL)))
2696 {
2697 const char *symname;
2698
2699 symname = q->symbol.name;
2700 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2701 {
2702 if (q->symbol.value > low_line_vma)
2703 {
2704 *line_ptr = 0;
2705 line_file_name = NULL;
2706 }
2707 if (q->symbol.value > low_func_vma)
2708 func = NULL;
2709 }
2710 }
2711 break;
2712
2713 case N_SO:
2714 /* If this symbol is less than the offset, but greater than
2715 the line number we have found so far, then we have not
2716 found the right line number. */
2717 if (q->symbol.value <= offset)
2718 {
2719 if (q->symbol.value > low_line_vma)
2720 {
2721 *line_ptr = 0;
2722 line_file_name = NULL;
2723 }
2724 if (q->symbol.value > low_func_vma)
2725 func = NULL;
2726 }
2727
2728 main_file_name = current_file_name = q->symbol.name;
2729 /* Look ahead to next symbol to check if that too is an N_SO. */
2730 p++;
2731 if (*p == NULL)
2732 goto done;
2733 q = (aout_symbol_type *) (*p);
2734 if (q->type != (int)N_SO)
2735 goto next;
2736
2737 /* Found a second N_SO First is directory; second is filename. */
2738 directory_name = current_file_name;
2739 main_file_name = current_file_name = q->symbol.name;
2740 if (obj_textsec (abfd) != section)
2741 goto done;
2742 break;
2743 case N_SOL:
2744 current_file_name = q->symbol.name;
2745 break;
2746
2747 case N_SLINE:
2748
2749 case N_DSLINE:
2750 case N_BSLINE:
2751 /* We'll keep this if it resolves nearer than the one we have
2752 already. */
2753 if (q->symbol.value >= low_line_vma
2754 && q->symbol.value <= offset)
2755 {
2756 *line_ptr = q->desc;
2757 low_line_vma = q->symbol.value;
2758 line_file_name = current_file_name;
2759 line_directory_name = directory_name;
2760 }
2761 break;
2762 case N_FUN:
2763 {
2764 /* We'll keep this if it is nearer than the one we have already. */
2765 if (q->symbol.value >= low_func_vma &&
2766 q->symbol.value <= offset)
2767 {
2768 low_func_vma = q->symbol.value;
2769 func = (asymbol *)q;
2770 }
2771 else if (q->symbol.value > offset)
2772 goto done;
2773 }
2774 break;
2775 }
2776 }
2777 }
2778
2779 done:
2780 if (*line_ptr != 0)
2781 {
2782 main_file_name = line_file_name;
2783 directory_name = line_directory_name;
2784 }
2785
2786 if (main_file_name == NULL
2787 || IS_ABSOLUTE_PATH (main_file_name)
2788 || directory_name == NULL)
2789 filelen = 0;
2790 else
2791 filelen = strlen (directory_name) + strlen (main_file_name);
2792
2793 if (func == NULL)
2794 funclen = 0;
2795 else
2796 funclen = strlen (bfd_asymbol_name (func));
2797
2798 if (adata (abfd).line_buf != NULL)
2799 free (adata (abfd).line_buf);
2800
2801 if (filelen + funclen == 0)
2802 adata (abfd).line_buf = buf = NULL;
2803 else
2804 {
2805 buf = (char *) bfd_malloc (filelen + funclen + 3);
2806 adata (abfd).line_buf = buf;
2807 if (buf == NULL)
2808 return FALSE;
2809 }
2810
2811 if (main_file_name != NULL)
2812 {
2813 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2814 *filename_ptr = main_file_name;
2815 else
2816 {
2817 sprintf (buf, "%s%s", directory_name, main_file_name);
2818 *filename_ptr = buf;
2819 buf += filelen + 1;
2820 }
2821 }
2822
2823 if (func)
2824 {
2825 const char *function = func->name;
2826 char *colon;
2827
2828 /* The caller expects a symbol name. We actually have a
2829 function name, without the leading underscore. Put the
2830 underscore back in, so that the caller gets a symbol name. */
2831 if (bfd_get_symbol_leading_char (abfd) == '\0')
2832 strcpy (buf, function);
2833 else
2834 {
2835 buf[0] = bfd_get_symbol_leading_char (abfd);
2836 strcpy (buf + 1, function);
2837 }
2838 /* Have to remove : stuff. */
2839 colon = strchr (buf, ':');
2840 if (colon != NULL)
2841 *colon = '\0';
2842 *functionname_ptr = buf;
2843 }
2844
2845 return TRUE;
2846 }
2847
2848 int
2849 NAME (aout, sizeof_headers) (bfd *abfd,
2850 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2851 {
2852 return adata (abfd).exec_bytes_size;
2853 }
2854
2855 /* Free all information we have cached for this BFD. We can always
2856 read it again later if we need it. */
2857
2858 bfd_boolean
2859 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2860 {
2861 asection *o;
2862
2863 if (bfd_get_format (abfd) != bfd_object
2864 || abfd->tdata.aout_data == NULL)
2865 return TRUE;
2866
2867 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2868 BFCI_FREE (obj_aout_symbols (abfd));
2869 #ifdef USE_MMAP
2870 obj_aout_external_syms (abfd) = 0;
2871 bfd_free_window (&obj_aout_sym_window (abfd));
2872 bfd_free_window (&obj_aout_string_window (abfd));
2873 obj_aout_external_strings (abfd) = 0;
2874 #else
2875 BFCI_FREE (obj_aout_external_syms (abfd));
2876 BFCI_FREE (obj_aout_external_strings (abfd));
2877 #endif
2878 for (o = abfd->sections; o != NULL; o = o->next)
2879 BFCI_FREE (o->relocation);
2880 #undef BFCI_FREE
2881
2882 return TRUE;
2883 }
2884 \f
2885 /* a.out link code. */
2886
2887 /* Routine to create an entry in an a.out link hash table. */
2888
2889 struct bfd_hash_entry *
2890 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2891 struct bfd_hash_table *table,
2892 const char *string)
2893 {
2894 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2895
2896 /* Allocate the structure if it has not already been allocated by a
2897 subclass. */
2898 if (ret == NULL)
2899 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2900 sizeof (* ret));
2901 if (ret == NULL)
2902 return NULL;
2903
2904 /* Call the allocation method of the superclass. */
2905 ret = ((struct aout_link_hash_entry *)
2906 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2907 table, string));
2908 if (ret)
2909 {
2910 /* Set local fields. */
2911 ret->written = FALSE;
2912 ret->indx = -1;
2913 }
2914
2915 return (struct bfd_hash_entry *) ret;
2916 }
2917
2918 /* Initialize an a.out link hash table. */
2919
2920 bfd_boolean
2921 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2922 bfd *abfd,
2923 struct bfd_hash_entry *(*newfunc)
2924 (struct bfd_hash_entry *, struct bfd_hash_table *,
2925 const char *),
2926 unsigned int entsize)
2927 {
2928 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2929 }
2930
2931 /* Create an a.out link hash table. */
2932
2933 struct bfd_link_hash_table *
2934 NAME (aout, link_hash_table_create) (bfd *abfd)
2935 {
2936 struct aout_link_hash_table *ret;
2937 bfd_size_type amt = sizeof (* ret);
2938
2939 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
2940 if (ret == NULL)
2941 return NULL;
2942
2943 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2944 NAME (aout, link_hash_newfunc),
2945 sizeof (struct aout_link_hash_entry)))
2946 {
2947 free (ret);
2948 return NULL;
2949 }
2950 return &ret->root;
2951 }
2952
2953 /* Add all symbols from an object file to the hash table. */
2954
2955 static bfd_boolean
2956 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2957 {
2958 bfd_boolean (*add_one_symbol)
2959 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2960 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2961 struct bfd_link_hash_entry **);
2962 struct external_nlist *syms;
2963 bfd_size_type sym_count;
2964 char *strings;
2965 bfd_boolean copy;
2966 struct aout_link_hash_entry **sym_hash;
2967 struct external_nlist *p;
2968 struct external_nlist *pend;
2969 bfd_size_type amt;
2970
2971 syms = obj_aout_external_syms (abfd);
2972 sym_count = obj_aout_external_sym_count (abfd);
2973 strings = obj_aout_external_strings (abfd);
2974 if (info->keep_memory)
2975 copy = FALSE;
2976 else
2977 copy = TRUE;
2978
2979 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2980 {
2981 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2982 (abfd, info, &syms, &sym_count, &strings)))
2983 return FALSE;
2984 }
2985
2986 if (sym_count == 0)
2987 return TRUE; /* Nothing to do. */
2988
2989 /* We keep a list of the linker hash table entries that correspond
2990 to particular symbols. We could just look them up in the hash
2991 table, but keeping the list is more efficient. Perhaps this
2992 should be conditional on info->keep_memory. */
2993 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2994 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
2995 if (sym_hash == NULL)
2996 return FALSE;
2997 obj_aout_sym_hashes (abfd) = sym_hash;
2998
2999 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3000 if (add_one_symbol == NULL)
3001 add_one_symbol = _bfd_generic_link_add_one_symbol;
3002
3003 p = syms;
3004 pend = p + sym_count;
3005 for (; p < pend; p++, sym_hash++)
3006 {
3007 int type;
3008 const char *name;
3009 bfd_vma value;
3010 asection *section;
3011 flagword flags;
3012 const char *string;
3013
3014 *sym_hash = NULL;
3015
3016 type = H_GET_8 (abfd, p->e_type);
3017
3018 /* Ignore debugging symbols. */
3019 if ((type & N_STAB) != 0)
3020 continue;
3021
3022 name = strings + GET_WORD (abfd, p->e_strx);
3023 value = GET_WORD (abfd, p->e_value);
3024 flags = BSF_GLOBAL;
3025 string = NULL;
3026 switch (type)
3027 {
3028 default:
3029 abort ();
3030
3031 case N_UNDF:
3032 case N_ABS:
3033 case N_TEXT:
3034 case N_DATA:
3035 case N_BSS:
3036 case N_FN_SEQ:
3037 case N_COMM:
3038 case N_SETV:
3039 case N_FN:
3040 /* Ignore symbols that are not externally visible. */
3041 continue;
3042 case N_INDR:
3043 /* Ignore local indirect symbol. */
3044 ++p;
3045 ++sym_hash;
3046 continue;
3047
3048 case N_UNDF | N_EXT:
3049 if (value == 0)
3050 {
3051 section = bfd_und_section_ptr;
3052 flags = 0;
3053 }
3054 else
3055 section = bfd_com_section_ptr;
3056 break;
3057 case N_ABS | N_EXT:
3058 section = bfd_abs_section_ptr;
3059 break;
3060 case N_TEXT | N_EXT:
3061 section = obj_textsec (abfd);
3062 value -= bfd_get_section_vma (abfd, section);
3063 break;
3064 case N_DATA | N_EXT:
3065 case N_SETV | N_EXT:
3066 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3067 translate_from_native_sym_flags. */
3068 section = obj_datasec (abfd);
3069 value -= bfd_get_section_vma (abfd, section);
3070 break;
3071 case N_BSS | N_EXT:
3072 section = obj_bsssec (abfd);
3073 value -= bfd_get_section_vma (abfd, section);
3074 break;
3075 case N_INDR | N_EXT:
3076 /* An indirect symbol. The next symbol is the symbol
3077 which this one really is. */
3078 BFD_ASSERT (p + 1 < pend);
3079 ++p;
3080 string = strings + GET_WORD (abfd, p->e_strx);
3081 section = bfd_ind_section_ptr;
3082 flags |= BSF_INDIRECT;
3083 break;
3084 case N_COMM | N_EXT:
3085 section = bfd_com_section_ptr;
3086 break;
3087 case N_SETA: case N_SETA | N_EXT:
3088 section = bfd_abs_section_ptr;
3089 flags |= BSF_CONSTRUCTOR;
3090 break;
3091 case N_SETT: case N_SETT | N_EXT:
3092 section = obj_textsec (abfd);
3093 flags |= BSF_CONSTRUCTOR;
3094 value -= bfd_get_section_vma (abfd, section);
3095 break;
3096 case N_SETD: case N_SETD | N_EXT:
3097 section = obj_datasec (abfd);
3098 flags |= BSF_CONSTRUCTOR;
3099 value -= bfd_get_section_vma (abfd, section);
3100 break;
3101 case N_SETB: case N_SETB | N_EXT:
3102 section = obj_bsssec (abfd);
3103 flags |= BSF_CONSTRUCTOR;
3104 value -= bfd_get_section_vma (abfd, section);
3105 break;
3106 case N_WARNING:
3107 /* A warning symbol. The next symbol is the one to warn
3108 about. If there is no next symbol, just look away. */
3109 if (p + 1 >= pend)
3110 return TRUE;
3111 ++p;
3112 string = name;
3113 name = strings + GET_WORD (abfd, p->e_strx);
3114 section = bfd_und_section_ptr;
3115 flags |= BSF_WARNING;
3116 break;
3117 case N_WEAKU:
3118 section = bfd_und_section_ptr;
3119 flags = BSF_WEAK;
3120 break;
3121 case N_WEAKA:
3122 section = bfd_abs_section_ptr;
3123 flags = BSF_WEAK;
3124 break;
3125 case N_WEAKT:
3126 section = obj_textsec (abfd);
3127 value -= bfd_get_section_vma (abfd, section);
3128 flags = BSF_WEAK;
3129 break;
3130 case N_WEAKD:
3131 section = obj_datasec (abfd);
3132 value -= bfd_get_section_vma (abfd, section);
3133 flags = BSF_WEAK;
3134 break;
3135 case N_WEAKB:
3136 section = obj_bsssec (abfd);
3137 value -= bfd_get_section_vma (abfd, section);
3138 flags = BSF_WEAK;
3139 break;
3140 }
3141
3142 if (! ((*add_one_symbol)
3143 (info, abfd, name, flags, section, value, string, copy, FALSE,
3144 (struct bfd_link_hash_entry **) sym_hash)))
3145 return FALSE;
3146
3147 /* Restrict the maximum alignment of a common symbol based on
3148 the architecture, since a.out has no way to represent
3149 alignment requirements of a section in a .o file. FIXME:
3150 This isn't quite right: it should use the architecture of the
3151 output file, not the input files. */
3152 if ((*sym_hash)->root.type == bfd_link_hash_common
3153 && ((*sym_hash)->root.u.c.p->alignment_power >
3154 bfd_get_arch_info (abfd)->section_align_power))
3155 (*sym_hash)->root.u.c.p->alignment_power =
3156 bfd_get_arch_info (abfd)->section_align_power;
3157
3158 /* If this is a set symbol, and we are not building sets, then
3159 it is possible for the hash entry to not have been set. In
3160 such a case, treat the symbol as not globally defined. */
3161 if ((*sym_hash)->root.type == bfd_link_hash_new)
3162 {
3163 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3164 *sym_hash = NULL;
3165 }
3166
3167 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3168 ++sym_hash;
3169 }
3170
3171 return TRUE;
3172 }
3173
3174 /* Free up the internal symbols read from an a.out file. */
3175
3176 static bfd_boolean
3177 aout_link_free_symbols (bfd *abfd)
3178 {
3179 if (obj_aout_external_syms (abfd) != NULL)
3180 {
3181 #ifdef USE_MMAP
3182 bfd_free_window (&obj_aout_sym_window (abfd));
3183 #else
3184 free ((void *) obj_aout_external_syms (abfd));
3185 #endif
3186 obj_aout_external_syms (abfd) = NULL;
3187 }
3188 if (obj_aout_external_strings (abfd) != NULL)
3189 {
3190 #ifdef USE_MMAP
3191 bfd_free_window (&obj_aout_string_window (abfd));
3192 #else
3193 free ((void *) obj_aout_external_strings (abfd));
3194 #endif
3195 obj_aout_external_strings (abfd) = NULL;
3196 }
3197 return TRUE;
3198 }
3199
3200 /* Add symbols from an a.out object file. */
3201
3202 static bfd_boolean
3203 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3204 {
3205 if (! aout_get_external_symbols (abfd))
3206 return FALSE;
3207 if (! aout_link_add_symbols (abfd, info))
3208 return FALSE;
3209 if (! info->keep_memory)
3210 {
3211 if (! aout_link_free_symbols (abfd))
3212 return FALSE;
3213 }
3214 return TRUE;
3215 }
3216
3217 /* Look through the internal symbols to see if this object file should
3218 be included in the link. We should include this object file if it
3219 defines any symbols which are currently undefined. If this object
3220 file defines a common symbol, then we may adjust the size of the
3221 known symbol but we do not include the object file in the link
3222 (unless there is some other reason to include it). */
3223
3224 static bfd_boolean
3225 aout_link_check_ar_symbols (bfd *abfd,
3226 struct bfd_link_info *info,
3227 bfd_boolean *pneeded,
3228 bfd **subsbfd)
3229 {
3230 struct external_nlist *p;
3231 struct external_nlist *pend;
3232 char *strings;
3233
3234 *pneeded = FALSE;
3235
3236 /* Look through all the symbols. */
3237 p = obj_aout_external_syms (abfd);
3238 pend = p + obj_aout_external_sym_count (abfd);
3239 strings = obj_aout_external_strings (abfd);
3240 for (; p < pend; p++)
3241 {
3242 int type = H_GET_8 (abfd, p->e_type);
3243 const char *name;
3244 struct bfd_link_hash_entry *h;
3245
3246 /* Ignore symbols that are not externally visible. This is an
3247 optimization only, as we check the type more thoroughly
3248 below. */
3249 if (((type & N_EXT) == 0
3250 || (type & N_STAB) != 0
3251 || type == N_FN)
3252 && type != N_WEAKA
3253 && type != N_WEAKT
3254 && type != N_WEAKD
3255 && type != N_WEAKB)
3256 {
3257 if (type == N_WARNING
3258 || type == N_INDR)
3259 ++p;
3260 continue;
3261 }
3262
3263 name = strings + GET_WORD (abfd, p->e_strx);
3264 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3265
3266 /* We are only interested in symbols that are currently
3267 undefined or common. */
3268 if (h == NULL
3269 || (h->type != bfd_link_hash_undefined
3270 && h->type != bfd_link_hash_common))
3271 {
3272 if (type == (N_INDR | N_EXT))
3273 ++p;
3274 continue;
3275 }
3276
3277 if (type == (N_TEXT | N_EXT)
3278 || type == (N_DATA | N_EXT)
3279 || type == (N_BSS | N_EXT)
3280 || type == (N_ABS | N_EXT)
3281 || type == (N_INDR | N_EXT))
3282 {
3283 /* This object file defines this symbol. We must link it
3284 in. This is true regardless of whether the current
3285 definition of the symbol is undefined or common.
3286
3287 If the current definition is common, we have a case in
3288 which we have already seen an object file including:
3289 int a;
3290 and this object file from the archive includes:
3291 int a = 5;
3292 In such a case, whether to include this object is target
3293 dependant for backward compatibility.
3294
3295 FIXME: The SunOS 4.1.3 linker will pull in the archive
3296 element if the symbol is defined in the .data section,
3297 but not if it is defined in the .text section. That
3298 seems a bit crazy to me, and it has not been implemented
3299 yet. However, it might be correct. */
3300 if (h->type == bfd_link_hash_common)
3301 {
3302 int skip = 0;
3303
3304 switch (info->common_skip_ar_symbols)
3305 {
3306 case bfd_link_common_skip_text:
3307 skip = (type == (N_TEXT | N_EXT));
3308 break;
3309 case bfd_link_common_skip_data:
3310 skip = (type == (N_DATA | N_EXT));
3311 break;
3312 default:
3313 case bfd_link_common_skip_all:
3314 skip = 1;
3315 break;
3316 }
3317
3318 if (skip)
3319 continue;
3320 }
3321
3322 if (!(*info->callbacks
3323 ->add_archive_element) (info, abfd, name, subsbfd))
3324 return FALSE;
3325 *pneeded = TRUE;
3326 return TRUE;
3327 }
3328
3329 if (type == (N_UNDF | N_EXT))
3330 {
3331 bfd_vma value;
3332
3333 value = GET_WORD (abfd, p->e_value);
3334 if (value != 0)
3335 {
3336 /* This symbol is common in the object from the archive
3337 file. */
3338 if (h->type == bfd_link_hash_undefined)
3339 {
3340 bfd *symbfd;
3341 unsigned int power;
3342
3343 symbfd = h->u.undef.abfd;
3344 if (symbfd == NULL)
3345 {
3346 /* This symbol was created as undefined from
3347 outside BFD. We assume that we should link
3348 in the object file. This is done for the -u
3349 option in the linker. */
3350 if (!(*info->callbacks
3351 ->add_archive_element) (info, abfd, name, subsbfd))
3352 return FALSE;
3353 *pneeded = TRUE;
3354 return TRUE;
3355 }
3356 /* Turn the current link symbol into a common
3357 symbol. It is already on the undefs list. */
3358 h->type = bfd_link_hash_common;
3359 h->u.c.p = (struct bfd_link_hash_common_entry *)
3360 bfd_hash_allocate (&info->hash->table,
3361 sizeof (struct bfd_link_hash_common_entry));
3362 if (h->u.c.p == NULL)
3363 return FALSE;
3364
3365 h->u.c.size = value;
3366
3367 /* FIXME: This isn't quite right. The maximum
3368 alignment of a common symbol should be set by the
3369 architecture of the output file, not of the input
3370 file. */
3371 power = bfd_log2 (value);
3372 if (power > bfd_get_arch_info (abfd)->section_align_power)
3373 power = bfd_get_arch_info (abfd)->section_align_power;
3374 h->u.c.p->alignment_power = power;
3375
3376 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3377 "COMMON");
3378 }
3379 else
3380 {
3381 /* Adjust the size of the common symbol if
3382 necessary. */
3383 if (value > h->u.c.size)
3384 h->u.c.size = value;
3385 }
3386 }
3387 }
3388
3389 if (type == N_WEAKA
3390 || type == N_WEAKT
3391 || type == N_WEAKD
3392 || type == N_WEAKB)
3393 {
3394 /* This symbol is weak but defined. We must pull it in if
3395 the current link symbol is undefined, but we don't want
3396 it if the current link symbol is common. */
3397 if (h->type == bfd_link_hash_undefined)
3398 {
3399 if (!(*info->callbacks
3400 ->add_archive_element) (info, abfd, name, subsbfd))
3401 return FALSE;
3402 *pneeded = TRUE;
3403 return TRUE;
3404 }
3405 }
3406 }
3407
3408 /* We do not need this object file. */
3409 return TRUE;
3410 }
3411 /* Check a single archive element to see if we need to include it in
3412 the link. *PNEEDED is set according to whether this element is
3413 needed in the link or not. This is called from
3414 _bfd_generic_link_add_archive_symbols. */
3415
3416 static bfd_boolean
3417 aout_link_check_archive_element (bfd *abfd,
3418 struct bfd_link_info *info,
3419 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
3420 const char *name ATTRIBUTE_UNUSED,
3421 bfd_boolean *pneeded)
3422 {
3423 bfd *oldbfd;
3424 bfd_boolean needed;
3425
3426 if (!aout_get_external_symbols (abfd))
3427 return FALSE;
3428
3429 oldbfd = abfd;
3430 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3431 return FALSE;
3432
3433 needed = *pneeded;
3434 if (needed)
3435 {
3436 /* Potentially, the add_archive_element hook may have set a
3437 substitute BFD for us. */
3438 if (abfd != oldbfd)
3439 {
3440 if (!info->keep_memory
3441 && !aout_link_free_symbols (oldbfd))
3442 return FALSE;
3443 if (!aout_get_external_symbols (abfd))
3444 return FALSE;
3445 }
3446 if (!aout_link_add_symbols (abfd, info))
3447 return FALSE;
3448 }
3449
3450 if (!info->keep_memory || !needed)
3451 {
3452 if (!aout_link_free_symbols (abfd))
3453 return FALSE;
3454 }
3455
3456 return TRUE;
3457 }
3458
3459 /* Given an a.out BFD, add symbols to the global hash table as
3460 appropriate. */
3461
3462 bfd_boolean
3463 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3464 {
3465 switch (bfd_get_format (abfd))
3466 {
3467 case bfd_object:
3468 return aout_link_add_object_symbols (abfd, info);
3469 case bfd_archive:
3470 return _bfd_generic_link_add_archive_symbols
3471 (abfd, info, aout_link_check_archive_element);
3472 default:
3473 bfd_set_error (bfd_error_wrong_format);
3474 return FALSE;
3475 }
3476 }
3477 \f
3478 /* A hash table used for header files with N_BINCL entries. */
3479
3480 struct aout_link_includes_table
3481 {
3482 struct bfd_hash_table root;
3483 };
3484
3485 /* A linked list of totals that we have found for a particular header
3486 file. */
3487
3488 struct aout_link_includes_totals
3489 {
3490 struct aout_link_includes_totals *next;
3491 bfd_vma total;
3492 };
3493
3494 /* An entry in the header file hash table. */
3495
3496 struct aout_link_includes_entry
3497 {
3498 struct bfd_hash_entry root;
3499 /* List of totals we have found for this file. */
3500 struct aout_link_includes_totals *totals;
3501 };
3502
3503 /* Look up an entry in an the header file hash table. */
3504
3505 #define aout_link_includes_lookup(table, string, create, copy) \
3506 ((struct aout_link_includes_entry *) \
3507 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3508
3509 /* During the final link step we need to pass around a bunch of
3510 information, so we do it in an instance of this structure. */
3511
3512 struct aout_final_link_info
3513 {
3514 /* General link information. */
3515 struct bfd_link_info *info;
3516 /* Output bfd. */
3517 bfd *output_bfd;
3518 /* Reloc file positions. */
3519 file_ptr treloff, dreloff;
3520 /* File position of symbols. */
3521 file_ptr symoff;
3522 /* String table. */
3523 struct bfd_strtab_hash *strtab;
3524 /* Header file hash table. */
3525 struct aout_link_includes_table includes;
3526 /* A buffer large enough to hold the contents of any section. */
3527 bfd_byte *contents;
3528 /* A buffer large enough to hold the relocs of any section. */
3529 void * relocs;
3530 /* A buffer large enough to hold the symbol map of any input BFD. */
3531 int *symbol_map;
3532 /* A buffer large enough to hold output symbols of any input BFD. */
3533 struct external_nlist *output_syms;
3534 };
3535
3536 /* The function to create a new entry in the header file hash table. */
3537
3538 static struct bfd_hash_entry *
3539 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3540 struct bfd_hash_table *table,
3541 const char *string)
3542 {
3543 struct aout_link_includes_entry *ret =
3544 (struct aout_link_includes_entry *) entry;
3545
3546 /* Allocate the structure if it has not already been allocated by a
3547 subclass. */
3548 if (ret == NULL)
3549 ret = (struct aout_link_includes_entry *)
3550 bfd_hash_allocate (table, sizeof (* ret));
3551 if (ret == NULL)
3552 return NULL;
3553
3554 /* Call the allocation method of the superclass. */
3555 ret = ((struct aout_link_includes_entry *)
3556 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3557 if (ret)
3558 {
3559 /* Set local fields. */
3560 ret->totals = NULL;
3561 }
3562
3563 return (struct bfd_hash_entry *) ret;
3564 }
3565
3566 /* Write out a symbol that was not associated with an a.out input
3567 object. */
3568
3569 static bfd_boolean
3570 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3571 {
3572 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3573 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3574 bfd *output_bfd;
3575 int type;
3576 bfd_vma val;
3577 struct external_nlist outsym;
3578 bfd_size_type indx;
3579 bfd_size_type amt;
3580
3581 if (h->root.type == bfd_link_hash_warning)
3582 {
3583 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3584 if (h->root.type == bfd_link_hash_new)
3585 return TRUE;
3586 }
3587
3588 output_bfd = flaginfo->output_bfd;
3589
3590 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3591 {
3592 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3593 (output_bfd, flaginfo->info, h)))
3594 {
3595 /* FIXME: No way to handle errors. */
3596 abort ();
3597 }
3598 }
3599
3600 if (h->written)
3601 return TRUE;
3602
3603 h->written = TRUE;
3604
3605 /* An indx of -2 means the symbol must be written. */
3606 if (h->indx != -2
3607 && (flaginfo->info->strip == strip_all
3608 || (flaginfo->info->strip == strip_some
3609 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3610 FALSE, FALSE) == NULL)))
3611 return TRUE;
3612
3613 switch (h->root.type)
3614 {
3615 default:
3616 case bfd_link_hash_warning:
3617 abort ();
3618 /* Avoid variable not initialized warnings. */
3619 return TRUE;
3620 case bfd_link_hash_new:
3621 /* This can happen for set symbols when sets are not being
3622 built. */
3623 return TRUE;
3624 case bfd_link_hash_undefined:
3625 type = N_UNDF | N_EXT;
3626 val = 0;
3627 break;
3628 case bfd_link_hash_defined:
3629 case bfd_link_hash_defweak:
3630 {
3631 asection *sec;
3632
3633 sec = h->root.u.def.section->output_section;
3634 BFD_ASSERT (bfd_is_abs_section (sec)
3635 || sec->owner == output_bfd);
3636 if (sec == obj_textsec (output_bfd))
3637 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3638 else if (sec == obj_datasec (output_bfd))
3639 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3640 else if (sec == obj_bsssec (output_bfd))
3641 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3642 else
3643 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3644 type |= N_EXT;
3645 val = (h->root.u.def.value
3646 + sec->vma
3647 + h->root.u.def.section->output_offset);
3648 }
3649 break;
3650 case bfd_link_hash_common:
3651 type = N_UNDF | N_EXT;
3652 val = h->root.u.c.size;
3653 break;
3654 case bfd_link_hash_undefweak:
3655 type = N_WEAKU;
3656 val = 0;
3657 break;
3658 case bfd_link_hash_indirect:
3659 /* We ignore these symbols, since the indirected symbol is
3660 already in the hash table. */
3661 return TRUE;
3662 }
3663
3664 H_PUT_8 (output_bfd, type, outsym.e_type);
3665 H_PUT_8 (output_bfd, 0, outsym.e_other);
3666 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3667 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3668 FALSE);
3669 if (indx == - (bfd_size_type) 1)
3670 /* FIXME: No way to handle errors. */
3671 abort ();
3672
3673 PUT_WORD (output_bfd, indx, outsym.e_strx);
3674 PUT_WORD (output_bfd, val, outsym.e_value);
3675
3676 amt = EXTERNAL_NLIST_SIZE;
3677 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3678 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3679 /* FIXME: No way to handle errors. */
3680 abort ();
3681
3682 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3683 h->indx = obj_aout_external_sym_count (output_bfd);
3684 ++obj_aout_external_sym_count (output_bfd);
3685
3686 return TRUE;
3687 }
3688
3689 /* Handle a link order which is supposed to generate a reloc. */
3690
3691 static bfd_boolean
3692 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3693 asection *o,
3694 struct bfd_link_order *p)
3695 {
3696 struct bfd_link_order_reloc *pr;
3697 int r_index;
3698 int r_extern;
3699 reloc_howto_type *howto;
3700 file_ptr *reloff_ptr = NULL;
3701 struct reloc_std_external srel;
3702 struct reloc_ext_external erel;
3703 void * rel_ptr;
3704 bfd_size_type amt;
3705
3706 pr = p->u.reloc.p;
3707
3708 if (p->type == bfd_section_reloc_link_order)
3709 {
3710 r_extern = 0;
3711 if (bfd_is_abs_section (pr->u.section))
3712 r_index = N_ABS | N_EXT;
3713 else
3714 {
3715 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3716 r_index = pr->u.section->target_index;
3717 }
3718 }
3719 else
3720 {
3721 struct aout_link_hash_entry *h;
3722
3723 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3724 r_extern = 1;
3725 h = ((struct aout_link_hash_entry *)
3726 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3727 pr->u.name, FALSE, FALSE, TRUE));
3728 if (h != NULL
3729 && h->indx >= 0)
3730 r_index = h->indx;
3731 else if (h != NULL)
3732 {
3733 /* We decided to strip this symbol, but it turns out that we
3734 can't. Note that we lose the other and desc information
3735 here. I don't think that will ever matter for a global
3736 symbol. */
3737 h->indx = -2;
3738 h->written = FALSE;
3739 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3740 return FALSE;
3741 r_index = h->indx;
3742 }
3743 else
3744 {
3745 if (! ((*flaginfo->info->callbacks->unattached_reloc)
3746 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3747 return FALSE;
3748 r_index = 0;
3749 }
3750 }
3751
3752 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3753 if (howto == 0)
3754 {
3755 bfd_set_error (bfd_error_bad_value);
3756 return FALSE;
3757 }
3758
3759 if (o == obj_textsec (flaginfo->output_bfd))
3760 reloff_ptr = &flaginfo->treloff;
3761 else if (o == obj_datasec (flaginfo->output_bfd))
3762 reloff_ptr = &flaginfo->dreloff;
3763 else
3764 abort ();
3765
3766 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3767 {
3768 #ifdef MY_put_reloc
3769 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3770 &srel);
3771 #else
3772 {
3773 int r_pcrel;
3774 int r_baserel;
3775 int r_jmptable;
3776 int r_relative;
3777 int r_length;
3778
3779 r_pcrel = (int) howto->pc_relative;
3780 r_baserel = (howto->type & 8) != 0;
3781 r_jmptable = (howto->type & 16) != 0;
3782 r_relative = (howto->type & 32) != 0;
3783 r_length = howto->size;
3784
3785 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3786 if (bfd_header_big_endian (flaginfo->output_bfd))
3787 {
3788 srel.r_index[0] = r_index >> 16;
3789 srel.r_index[1] = r_index >> 8;
3790 srel.r_index[2] = r_index;
3791 srel.r_type[0] =
3792 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3793 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3794 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3795 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3796 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3797 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3798 }
3799 else
3800 {
3801 srel.r_index[2] = r_index >> 16;
3802 srel.r_index[1] = r_index >> 8;
3803 srel.r_index[0] = r_index;
3804 srel.r_type[0] =
3805 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3806 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3807 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3808 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3809 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3810 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3811 }
3812 }
3813 #endif
3814 rel_ptr = (void *) &srel;
3815
3816 /* We have to write the addend into the object file, since
3817 standard a.out relocs are in place. It would be more
3818 reliable if we had the current contents of the file here,
3819 rather than assuming zeroes, but we can't read the file since
3820 it was opened using bfd_openw. */
3821 if (pr->addend != 0)
3822 {
3823 bfd_size_type size;
3824 bfd_reloc_status_type r;
3825 bfd_byte *buf;
3826 bfd_boolean ok;
3827
3828 size = bfd_get_reloc_size (howto);
3829 buf = (bfd_byte *) bfd_zmalloc (size);
3830 if (buf == NULL)
3831 return FALSE;
3832 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3833 (bfd_vma) pr->addend, buf);
3834 switch (r)
3835 {
3836 case bfd_reloc_ok:
3837 break;
3838 default:
3839 case bfd_reloc_outofrange:
3840 abort ();
3841 case bfd_reloc_overflow:
3842 if (! ((*flaginfo->info->callbacks->reloc_overflow)
3843 (flaginfo->info, NULL,
3844 (p->type == bfd_section_reloc_link_order
3845 ? bfd_section_name (flaginfo->output_bfd,
3846 pr->u.section)
3847 : pr->u.name),
3848 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3849 {
3850 free (buf);
3851 return FALSE;
3852 }
3853 break;
3854 }
3855 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3856 (file_ptr) p->offset, size);
3857 free (buf);
3858 if (! ok)
3859 return FALSE;
3860 }
3861 }
3862 else
3863 {
3864 #ifdef MY_put_ext_reloc
3865 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3866 howto, &erel, pr->addend);
3867 #else
3868 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3869
3870 if (bfd_header_big_endian (flaginfo->output_bfd))
3871 {
3872 erel.r_index[0] = r_index >> 16;
3873 erel.r_index[1] = r_index >> 8;
3874 erel.r_index[2] = r_index;
3875 erel.r_type[0] =
3876 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3877 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3878 }
3879 else
3880 {
3881 erel.r_index[2] = r_index >> 16;
3882 erel.r_index[1] = r_index >> 8;
3883 erel.r_index[0] = r_index;
3884 erel.r_type[0] =
3885 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3886 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3887 }
3888
3889 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3890 #endif /* MY_put_ext_reloc */
3891
3892 rel_ptr = (void *) &erel;
3893 }
3894
3895 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3896 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3897 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3898 return FALSE;
3899
3900 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3901
3902 /* Assert that the relocs have not run into the symbols, and that n
3903 the text relocs have not run into the data relocs. */
3904 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3905 && (reloff_ptr != &flaginfo->treloff
3906 || (*reloff_ptr
3907 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3908
3909 return TRUE;
3910 }
3911
3912 /* Get the section corresponding to a reloc index. */
3913
3914 static INLINE asection *
3915 aout_reloc_index_to_section (bfd *abfd, int indx)
3916 {
3917 switch (indx & N_TYPE)
3918 {
3919 case N_TEXT: return obj_textsec (abfd);
3920 case N_DATA: return obj_datasec (abfd);
3921 case N_BSS: return obj_bsssec (abfd);
3922 case N_ABS:
3923 case N_UNDF: return bfd_abs_section_ptr;
3924 default: abort ();
3925 }
3926 return NULL;
3927 }
3928
3929 /* Relocate an a.out section using standard a.out relocs. */
3930
3931 static bfd_boolean
3932 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3933 bfd *input_bfd,
3934 asection *input_section,
3935 struct reloc_std_external *relocs,
3936 bfd_size_type rel_size,
3937 bfd_byte *contents)
3938 {
3939 bfd_boolean (*check_dynamic_reloc)
3940 (struct bfd_link_info *, bfd *, asection *,
3941 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3942 bfd_vma *);
3943 bfd *output_bfd;
3944 bfd_boolean relocatable;
3945 struct external_nlist *syms;
3946 char *strings;
3947 struct aout_link_hash_entry **sym_hashes;
3948 int *symbol_map;
3949 bfd_size_type reloc_count;
3950 struct reloc_std_external *rel;
3951 struct reloc_std_external *rel_end;
3952
3953 output_bfd = flaginfo->output_bfd;
3954 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3955
3956 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3957 BFD_ASSERT (input_bfd->xvec->header_byteorder
3958 == output_bfd->xvec->header_byteorder);
3959
3960 relocatable = flaginfo->info->relocatable;
3961 syms = obj_aout_external_syms (input_bfd);
3962 strings = obj_aout_external_strings (input_bfd);
3963 sym_hashes = obj_aout_sym_hashes (input_bfd);
3964 symbol_map = flaginfo->symbol_map;
3965
3966 reloc_count = rel_size / RELOC_STD_SIZE;
3967 rel = relocs;
3968 rel_end = rel + reloc_count;
3969 for (; rel < rel_end; rel++)
3970 {
3971 bfd_vma r_addr;
3972 int r_index;
3973 int r_extern;
3974 int r_pcrel;
3975 int r_baserel = 0;
3976 reloc_howto_type *howto;
3977 struct aout_link_hash_entry *h = NULL;
3978 bfd_vma relocation;
3979 bfd_reloc_status_type r;
3980
3981 r_addr = GET_SWORD (input_bfd, rel->r_address);
3982
3983 #ifdef MY_reloc_howto
3984 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3985 #else
3986 {
3987 int r_jmptable;
3988 int r_relative;
3989 int r_length;
3990 unsigned int howto_idx;
3991
3992 if (bfd_header_big_endian (input_bfd))
3993 {
3994 r_index = (((unsigned int) rel->r_index[0] << 16)
3995 | ((unsigned int) rel->r_index[1] << 8)
3996 | rel->r_index[2]);
3997 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3998 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3999 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4000 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4001 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4002 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4003 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4004 }
4005 else
4006 {
4007 r_index = (((unsigned int) rel->r_index[2] << 16)
4008 | ((unsigned int) rel->r_index[1] << 8)
4009 | rel->r_index[0]);
4010 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4011 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4012 r_baserel = (0 != (rel->r_type[0]
4013 & RELOC_STD_BITS_BASEREL_LITTLE));
4014 r_jmptable= (0 != (rel->r_type[0]
4015 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4016 r_relative= (0 != (rel->r_type[0]
4017 & RELOC_STD_BITS_RELATIVE_LITTLE));
4018 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4019 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4020 }
4021
4022 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4023 + 16 * r_jmptable + 32 * r_relative);
4024 if (howto_idx < TABLE_SIZE (howto_table_std))
4025 howto = howto_table_std + howto_idx;
4026 else
4027 howto = NULL;
4028 }
4029 #endif
4030
4031 if (howto == NULL)
4032 {
4033 (*flaginfo->info->callbacks->einfo)
4034 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4035 bfd_set_error (bfd_error_bad_value);
4036 return FALSE;
4037 }
4038
4039 if (relocatable)
4040 {
4041 /* We are generating a relocatable output file, and must
4042 modify the reloc accordingly. */
4043 if (r_extern)
4044 {
4045 /* If we know the symbol this relocation is against,
4046 convert it into a relocation against a section. This
4047 is what the native linker does. */
4048 h = sym_hashes[r_index];
4049 if (h != NULL
4050 && (h->root.type == bfd_link_hash_defined
4051 || h->root.type == bfd_link_hash_defweak))
4052 {
4053 asection *output_section;
4054
4055 /* Change the r_extern value. */
4056 if (bfd_header_big_endian (output_bfd))
4057 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4058 else
4059 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4060
4061 /* Compute a new r_index. */
4062 output_section = h->root.u.def.section->output_section;
4063 if (output_section == obj_textsec (output_bfd))
4064 r_index = N_TEXT;
4065 else if (output_section == obj_datasec (output_bfd))
4066 r_index = N_DATA;
4067 else if (output_section == obj_bsssec (output_bfd))
4068 r_index = N_BSS;
4069 else
4070 r_index = N_ABS;
4071
4072 /* Add the symbol value and the section VMA to the
4073 addend stored in the contents. */
4074 relocation = (h->root.u.def.value
4075 + output_section->vma
4076 + h->root.u.def.section->output_offset);
4077 }
4078 else
4079 {
4080 /* We must change r_index according to the symbol
4081 map. */
4082 r_index = symbol_map[r_index];
4083
4084 if (r_index == -1)
4085 {
4086 if (h != NULL)
4087 {
4088 /* We decided to strip this symbol, but it
4089 turns out that we can't. Note that we
4090 lose the other and desc information here.
4091 I don't think that will ever matter for a
4092 global symbol. */
4093 if (h->indx < 0)
4094 {
4095 h->indx = -2;
4096 h->written = FALSE;
4097 if (!aout_link_write_other_symbol (&h->root.root,
4098 flaginfo))
4099 return FALSE;
4100 }
4101 r_index = h->indx;
4102 }
4103 else
4104 {
4105 const char *name;
4106
4107 name = strings + GET_WORD (input_bfd,
4108 syms[r_index].e_strx);
4109 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4110 (flaginfo->info, name, input_bfd, input_section,
4111 r_addr)))
4112 return FALSE;
4113 r_index = 0;
4114 }
4115 }
4116
4117 relocation = 0;
4118 }
4119
4120 /* Write out the new r_index value. */
4121 if (bfd_header_big_endian (output_bfd))
4122 {
4123 rel->r_index[0] = r_index >> 16;
4124 rel->r_index[1] = r_index >> 8;
4125 rel->r_index[2] = r_index;
4126 }
4127 else
4128 {
4129 rel->r_index[2] = r_index >> 16;
4130 rel->r_index[1] = r_index >> 8;
4131 rel->r_index[0] = r_index;
4132 }
4133 }
4134 else
4135 {
4136 asection *section;
4137
4138 /* This is a relocation against a section. We must
4139 adjust by the amount that the section moved. */
4140 section = aout_reloc_index_to_section (input_bfd, r_index);
4141 relocation = (section->output_section->vma
4142 + section->output_offset
4143 - section->vma);
4144 }
4145
4146 /* Change the address of the relocation. */
4147 PUT_WORD (output_bfd,
4148 r_addr + input_section->output_offset,
4149 rel->r_address);
4150
4151 /* Adjust a PC relative relocation by removing the reference
4152 to the original address in the section and including the
4153 reference to the new address. */
4154 if (r_pcrel)
4155 relocation -= (input_section->output_section->vma
4156 + input_section->output_offset
4157 - input_section->vma);
4158
4159 #ifdef MY_relocatable_reloc
4160 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4161 #endif
4162
4163 if (relocation == 0)
4164 r = bfd_reloc_ok;
4165 else
4166 r = MY_relocate_contents (howto,
4167 input_bfd, relocation,
4168 contents + r_addr);
4169 }
4170 else
4171 {
4172 bfd_boolean hundef;
4173
4174 /* We are generating an executable, and must do a full
4175 relocation. */
4176 hundef = FALSE;
4177
4178 if (r_extern)
4179 {
4180 h = sym_hashes[r_index];
4181
4182 if (h != NULL
4183 && (h->root.type == bfd_link_hash_defined
4184 || h->root.type == bfd_link_hash_defweak))
4185 {
4186 relocation = (h->root.u.def.value
4187 + h->root.u.def.section->output_section->vma
4188 + h->root.u.def.section->output_offset);
4189 }
4190 else if (h != NULL
4191 && h->root.type == bfd_link_hash_undefweak)
4192 relocation = 0;
4193 else
4194 {
4195 hundef = TRUE;
4196 relocation = 0;
4197 }
4198 }
4199 else
4200 {
4201 asection *section;
4202
4203 section = aout_reloc_index_to_section (input_bfd, r_index);
4204 relocation = (section->output_section->vma
4205 + section->output_offset
4206 - section->vma);
4207 if (r_pcrel)
4208 relocation += input_section->vma;
4209 }
4210
4211 if (check_dynamic_reloc != NULL)
4212 {
4213 bfd_boolean skip;
4214
4215 if (! ((*check_dynamic_reloc)
4216 (flaginfo->info, input_bfd, input_section, h,
4217 (void *) rel, contents, &skip, &relocation)))
4218 return FALSE;
4219 if (skip)
4220 continue;
4221 }
4222
4223 /* Now warn if a global symbol is undefined. We could not
4224 do this earlier, because check_dynamic_reloc might want
4225 to skip this reloc. */
4226 if (hundef && ! flaginfo->info->shared && ! r_baserel)
4227 {
4228 const char *name;
4229
4230 if (h != NULL)
4231 name = h->root.root.string;
4232 else
4233 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4234 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4235 (flaginfo->info, name, input_bfd, input_section,
4236 r_addr, TRUE)))
4237 return FALSE;
4238 }
4239
4240 r = MY_final_link_relocate (howto,
4241 input_bfd, input_section,
4242 contents, r_addr, relocation,
4243 (bfd_vma) 0);
4244 }
4245
4246 if (r != bfd_reloc_ok)
4247 {
4248 switch (r)
4249 {
4250 default:
4251 case bfd_reloc_outofrange:
4252 abort ();
4253 case bfd_reloc_overflow:
4254 {
4255 const char *name;
4256
4257 if (h != NULL)
4258 name = NULL;
4259 else if (r_extern)
4260 name = strings + GET_WORD (input_bfd,
4261 syms[r_index].e_strx);
4262 else
4263 {
4264 asection *s;
4265
4266 s = aout_reloc_index_to_section (input_bfd, r_index);
4267 name = bfd_section_name (input_bfd, s);
4268 }
4269 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4270 (flaginfo->info, (h ? &h->root : NULL), name,
4271 howto->name, (bfd_vma) 0, input_bfd,
4272 input_section, r_addr)))
4273 return FALSE;
4274 }
4275 break;
4276 }
4277 }
4278 }
4279
4280 return TRUE;
4281 }
4282
4283 /* Relocate an a.out section using extended a.out relocs. */
4284
4285 static bfd_boolean
4286 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4287 bfd *input_bfd,
4288 asection *input_section,
4289 struct reloc_ext_external *relocs,
4290 bfd_size_type rel_size,
4291 bfd_byte *contents)
4292 {
4293 bfd_boolean (*check_dynamic_reloc)
4294 (struct bfd_link_info *, bfd *, asection *,
4295 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4296 bfd_vma *);
4297 bfd *output_bfd;
4298 bfd_boolean relocatable;
4299 struct external_nlist *syms;
4300 char *strings;
4301 struct aout_link_hash_entry **sym_hashes;
4302 int *symbol_map;
4303 bfd_size_type reloc_count;
4304 struct reloc_ext_external *rel;
4305 struct reloc_ext_external *rel_end;
4306
4307 output_bfd = flaginfo->output_bfd;
4308 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4309
4310 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4311 BFD_ASSERT (input_bfd->xvec->header_byteorder
4312 == output_bfd->xvec->header_byteorder);
4313
4314 relocatable = flaginfo->info->relocatable;
4315 syms = obj_aout_external_syms (input_bfd);
4316 strings = obj_aout_external_strings (input_bfd);
4317 sym_hashes = obj_aout_sym_hashes (input_bfd);
4318 symbol_map = flaginfo->symbol_map;
4319
4320 reloc_count = rel_size / RELOC_EXT_SIZE;
4321 rel = relocs;
4322 rel_end = rel + reloc_count;
4323 for (; rel < rel_end; rel++)
4324 {
4325 bfd_vma r_addr;
4326 int r_index;
4327 int r_extern;
4328 unsigned int r_type;
4329 bfd_vma r_addend;
4330 struct aout_link_hash_entry *h = NULL;
4331 asection *r_section = NULL;
4332 bfd_vma relocation;
4333
4334 r_addr = GET_SWORD (input_bfd, rel->r_address);
4335
4336 if (bfd_header_big_endian (input_bfd))
4337 {
4338 r_index = (((unsigned int) rel->r_index[0] << 16)
4339 | ((unsigned int) rel->r_index[1] << 8)
4340 | rel->r_index[2]);
4341 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4342 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4343 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4344 }
4345 else
4346 {
4347 r_index = (((unsigned int) rel->r_index[2] << 16)
4348 | ((unsigned int) rel->r_index[1] << 8)
4349 | rel->r_index[0]);
4350 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4351 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4352 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4353 }
4354
4355 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4356
4357 if (r_type >= TABLE_SIZE (howto_table_ext))
4358 {
4359 (*flaginfo->info->callbacks->einfo)
4360 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4361 bfd_set_error (bfd_error_bad_value);
4362 return FALSE;
4363 }
4364
4365 if (relocatable)
4366 {
4367 /* We are generating a relocatable output file, and must
4368 modify the reloc accordingly. */
4369 if (r_extern
4370 || r_type == (unsigned int) RELOC_BASE10
4371 || r_type == (unsigned int) RELOC_BASE13
4372 || r_type == (unsigned int) RELOC_BASE22)
4373 {
4374 /* If we know the symbol this relocation is against,
4375 convert it into a relocation against a section. This
4376 is what the native linker does. */
4377 if (r_type == (unsigned int) RELOC_BASE10
4378 || r_type == (unsigned int) RELOC_BASE13
4379 || r_type == (unsigned int) RELOC_BASE22)
4380 h = NULL;
4381 else
4382 h = sym_hashes[r_index];
4383 if (h != NULL
4384 && (h->root.type == bfd_link_hash_defined
4385 || h->root.type == bfd_link_hash_defweak))
4386 {
4387 asection *output_section;
4388
4389 /* Change the r_extern value. */
4390 if (bfd_header_big_endian (output_bfd))
4391 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4392 else
4393 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4394
4395 /* Compute a new r_index. */
4396 output_section = h->root.u.def.section->output_section;
4397 if (output_section == obj_textsec (output_bfd))
4398 r_index = N_TEXT;
4399 else if (output_section == obj_datasec (output_bfd))
4400 r_index = N_DATA;
4401 else if (output_section == obj_bsssec (output_bfd))
4402 r_index = N_BSS;
4403 else
4404 r_index = N_ABS;
4405
4406 /* Add the symbol value and the section VMA to the
4407 addend. */
4408 relocation = (h->root.u.def.value
4409 + output_section->vma
4410 + h->root.u.def.section->output_offset);
4411
4412 /* Now RELOCATION is the VMA of the final
4413 destination. If this is a PC relative reloc,
4414 then ADDEND is the negative of the source VMA.
4415 We want to set ADDEND to the difference between
4416 the destination VMA and the source VMA, which
4417 means we must adjust RELOCATION by the change in
4418 the source VMA. This is done below. */
4419 }
4420 else
4421 {
4422 /* We must change r_index according to the symbol
4423 map. */
4424 r_index = symbol_map[r_index];
4425
4426 if (r_index == -1)
4427 {
4428 if (h != NULL)
4429 {
4430 /* We decided to strip this symbol, but it
4431 turns out that we can't. Note that we
4432 lose the other and desc information here.
4433 I don't think that will ever matter for a
4434 global symbol. */
4435 if (h->indx < 0)
4436 {
4437 h->indx = -2;
4438 h->written = FALSE;
4439 if (!aout_link_write_other_symbol (&h->root.root,
4440 flaginfo))
4441 return FALSE;
4442 }
4443 r_index = h->indx;
4444 }
4445 else
4446 {
4447 const char *name;
4448
4449 name = strings + GET_WORD (input_bfd,
4450 syms[r_index].e_strx);
4451 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4452 (flaginfo->info, name, input_bfd, input_section,
4453 r_addr)))
4454 return FALSE;
4455 r_index = 0;
4456 }
4457 }
4458
4459 relocation = 0;
4460
4461 /* If this is a PC relative reloc, then the addend
4462 is the negative of the source VMA. We must
4463 adjust it by the change in the source VMA. This
4464 is done below. */
4465 }
4466
4467 /* Write out the new r_index value. */
4468 if (bfd_header_big_endian (output_bfd))
4469 {
4470 rel->r_index[0] = r_index >> 16;
4471 rel->r_index[1] = r_index >> 8;
4472 rel->r_index[2] = r_index;
4473 }
4474 else
4475 {
4476 rel->r_index[2] = r_index >> 16;
4477 rel->r_index[1] = r_index >> 8;
4478 rel->r_index[0] = r_index;
4479 }
4480 }
4481 else
4482 {
4483 /* This is a relocation against a section. We must
4484 adjust by the amount that the section moved. */
4485 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4486 relocation = (r_section->output_section->vma
4487 + r_section->output_offset
4488 - r_section->vma);
4489
4490 /* If this is a PC relative reloc, then the addend is
4491 the difference in VMA between the destination and the
4492 source. We have just adjusted for the change in VMA
4493 of the destination, so we must also adjust by the
4494 change in VMA of the source. This is done below. */
4495 }
4496
4497 /* As described above, we must always adjust a PC relative
4498 reloc by the change in VMA of the source. However, if
4499 pcrel_offset is set, then the addend does not include the
4500 location within the section, in which case we don't need
4501 to adjust anything. */
4502 if (howto_table_ext[r_type].pc_relative
4503 && ! howto_table_ext[r_type].pcrel_offset)
4504 relocation -= (input_section->output_section->vma
4505 + input_section->output_offset
4506 - input_section->vma);
4507
4508 /* Change the addend if necessary. */
4509 if (relocation != 0)
4510 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4511
4512 /* Change the address of the relocation. */
4513 PUT_WORD (output_bfd,
4514 r_addr + input_section->output_offset,
4515 rel->r_address);
4516 }
4517 else
4518 {
4519 bfd_boolean hundef;
4520 bfd_reloc_status_type r;
4521
4522 /* We are generating an executable, and must do a full
4523 relocation. */
4524 hundef = FALSE;
4525
4526 if (r_extern)
4527 {
4528 h = sym_hashes[r_index];
4529
4530 if (h != NULL
4531 && (h->root.type == bfd_link_hash_defined
4532 || h->root.type == bfd_link_hash_defweak))
4533 {
4534 relocation = (h->root.u.def.value
4535 + h->root.u.def.section->output_section->vma
4536 + h->root.u.def.section->output_offset);
4537 }
4538 else if (h != NULL
4539 && h->root.type == bfd_link_hash_undefweak)
4540 relocation = 0;
4541 else
4542 {
4543 hundef = TRUE;
4544 relocation = 0;
4545 }
4546 }
4547 else if (r_type == (unsigned int) RELOC_BASE10
4548 || r_type == (unsigned int) RELOC_BASE13
4549 || r_type == (unsigned int) RELOC_BASE22)
4550 {
4551 struct external_nlist *sym;
4552 int type;
4553
4554 /* For base relative relocs, r_index is always an index
4555 into the symbol table, even if r_extern is 0. */
4556 sym = syms + r_index;
4557 type = H_GET_8 (input_bfd, sym->e_type);
4558 if ((type & N_TYPE) == N_TEXT
4559 || type == N_WEAKT)
4560 r_section = obj_textsec (input_bfd);
4561 else if ((type & N_TYPE) == N_DATA
4562 || type == N_WEAKD)
4563 r_section = obj_datasec (input_bfd);
4564 else if ((type & N_TYPE) == N_BSS
4565 || type == N_WEAKB)
4566 r_section = obj_bsssec (input_bfd);
4567 else if ((type & N_TYPE) == N_ABS
4568 || type == N_WEAKA)
4569 r_section = bfd_abs_section_ptr;
4570 else
4571 abort ();
4572 relocation = (r_section->output_section->vma
4573 + r_section->output_offset
4574 + (GET_WORD (input_bfd, sym->e_value)
4575 - r_section->vma));
4576 }
4577 else
4578 {
4579 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4580
4581 /* If this is a PC relative reloc, then R_ADDEND is the
4582 difference between the two vmas, or
4583 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4584 where
4585 old_dest_sec == section->vma
4586 and
4587 old_src_sec == input_section->vma
4588 and
4589 old_src_off == r_addr
4590
4591 _bfd_final_link_relocate expects RELOCATION +
4592 R_ADDEND to be the VMA of the destination minus
4593 r_addr (the minus r_addr is because this relocation
4594 is not pcrel_offset, which is a bit confusing and
4595 should, perhaps, be changed), or
4596 new_dest_sec
4597 where
4598 new_dest_sec == output_section->vma + output_offset
4599 We arrange for this to happen by setting RELOCATION to
4600 new_dest_sec + old_src_sec - old_dest_sec
4601
4602 If this is not a PC relative reloc, then R_ADDEND is
4603 simply the VMA of the destination, so we set
4604 RELOCATION to the change in the destination VMA, or
4605 new_dest_sec - old_dest_sec
4606 */
4607 relocation = (r_section->output_section->vma
4608 + r_section->output_offset
4609 - r_section->vma);
4610 if (howto_table_ext[r_type].pc_relative)
4611 relocation += input_section->vma;
4612 }
4613
4614 if (check_dynamic_reloc != NULL)
4615 {
4616 bfd_boolean skip;
4617
4618 if (! ((*check_dynamic_reloc)
4619 (flaginfo->info, input_bfd, input_section, h,
4620 (void *) rel, contents, &skip, &relocation)))
4621 return FALSE;
4622 if (skip)
4623 continue;
4624 }
4625
4626 /* Now warn if a global symbol is undefined. We could not
4627 do this earlier, because check_dynamic_reloc might want
4628 to skip this reloc. */
4629 if (hundef
4630 && ! flaginfo->info->shared
4631 && r_type != (unsigned int) RELOC_BASE10
4632 && r_type != (unsigned int) RELOC_BASE13
4633 && r_type != (unsigned int) RELOC_BASE22)
4634 {
4635 const char *name;
4636
4637 if (h != NULL)
4638 name = h->root.root.string;
4639 else
4640 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4641 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4642 (flaginfo->info, name, input_bfd, input_section,
4643 r_addr, TRUE)))
4644 return FALSE;
4645 }
4646
4647 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4648 r = MY_final_link_relocate (howto_table_ext + r_type,
4649 input_bfd, input_section,
4650 contents, r_addr, relocation,
4651 r_addend);
4652 else
4653 {
4654 bfd_vma x;
4655
4656 x = bfd_get_32 (input_bfd, contents + r_addr);
4657 x = x + relocation + r_addend;
4658 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4659 r = bfd_reloc_ok;
4660 }
4661
4662 if (r != bfd_reloc_ok)
4663 {
4664 switch (r)
4665 {
4666 default:
4667 case bfd_reloc_outofrange:
4668 abort ();
4669 case bfd_reloc_overflow:
4670 {
4671 const char *name;
4672
4673 if (h != NULL)
4674 name = NULL;
4675 else if (r_extern
4676 || r_type == (unsigned int) RELOC_BASE10
4677 || r_type == (unsigned int) RELOC_BASE13
4678 || r_type == (unsigned int) RELOC_BASE22)
4679 name = strings + GET_WORD (input_bfd,
4680 syms[r_index].e_strx);
4681 else
4682 {
4683 asection *s;
4684
4685 s = aout_reloc_index_to_section (input_bfd, r_index);
4686 name = bfd_section_name (input_bfd, s);
4687 }
4688 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4689 (flaginfo->info, (h ? &h->root : NULL), name,
4690 howto_table_ext[r_type].name,
4691 r_addend, input_bfd, input_section, r_addr)))
4692 return FALSE;
4693 }
4694 break;
4695 }
4696 }
4697 }
4698 }
4699
4700 return TRUE;
4701 }
4702
4703 /* Link an a.out section into the output file. */
4704
4705 static bfd_boolean
4706 aout_link_input_section (struct aout_final_link_info *flaginfo,
4707 bfd *input_bfd,
4708 asection *input_section,
4709 file_ptr *reloff_ptr,
4710 bfd_size_type rel_size)
4711 {
4712 bfd_size_type input_size;
4713 void * relocs;
4714
4715 /* Get the section contents. */
4716 input_size = input_section->size;
4717 if (! bfd_get_section_contents (input_bfd, input_section,
4718 (void *) flaginfo->contents,
4719 (file_ptr) 0, input_size))
4720 return FALSE;
4721
4722 /* Read in the relocs if we haven't already done it. */
4723 if (aout_section_data (input_section) != NULL
4724 && aout_section_data (input_section)->relocs != NULL)
4725 relocs = aout_section_data (input_section)->relocs;
4726 else
4727 {
4728 relocs = flaginfo->relocs;
4729 if (rel_size > 0)
4730 {
4731 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4732 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4733 return FALSE;
4734 }
4735 }
4736
4737 /* Relocate the section contents. */
4738 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4739 {
4740 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4741 (struct reloc_std_external *) relocs,
4742 rel_size, flaginfo->contents))
4743 return FALSE;
4744 }
4745 else
4746 {
4747 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4748 (struct reloc_ext_external *) relocs,
4749 rel_size, flaginfo->contents))
4750 return FALSE;
4751 }
4752
4753 /* Write out the section contents. */
4754 if (! bfd_set_section_contents (flaginfo->output_bfd,
4755 input_section->output_section,
4756 (void *) flaginfo->contents,
4757 (file_ptr) input_section->output_offset,
4758 input_size))
4759 return FALSE;
4760
4761 /* If we are producing relocatable output, the relocs were
4762 modified, and we now write them out. */
4763 if (flaginfo->info->relocatable && rel_size > 0)
4764 {
4765 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4766 return FALSE;
4767 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4768 return FALSE;
4769 *reloff_ptr += rel_size;
4770
4771 /* Assert that the relocs have not run into the symbols, and
4772 that if these are the text relocs they have not run into the
4773 data relocs. */
4774 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4775 && (reloff_ptr != &flaginfo->treloff
4776 || (*reloff_ptr
4777 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4778 }
4779
4780 return TRUE;
4781 }
4782
4783 /* Adjust and write out the symbols for an a.out file. Set the new
4784 symbol indices into a symbol_map. */
4785
4786 static bfd_boolean
4787 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4788 {
4789 bfd *output_bfd;
4790 bfd_size_type sym_count;
4791 char *strings;
4792 enum bfd_link_strip strip;
4793 enum bfd_link_discard discard;
4794 struct external_nlist *outsym;
4795 bfd_size_type strtab_index;
4796 struct external_nlist *sym;
4797 struct external_nlist *sym_end;
4798 struct aout_link_hash_entry **sym_hash;
4799 int *symbol_map;
4800 bfd_boolean pass;
4801 bfd_boolean skip_next;
4802
4803 output_bfd = flaginfo->output_bfd;
4804 sym_count = obj_aout_external_sym_count (input_bfd);
4805 strings = obj_aout_external_strings (input_bfd);
4806 strip = flaginfo->info->strip;
4807 discard = flaginfo->info->discard;
4808 outsym = flaginfo->output_syms;
4809
4810 /* First write out a symbol for this object file, unless we are
4811 discarding such symbols. */
4812 if (strip != strip_all
4813 && (strip != strip_some
4814 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4815 FALSE, FALSE) != NULL)
4816 && discard != discard_all)
4817 {
4818 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4819 H_PUT_8 (output_bfd, 0, outsym->e_other);
4820 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4821 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4822 input_bfd->filename, FALSE);
4823 if (strtab_index == (bfd_size_type) -1)
4824 return FALSE;
4825 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4826 PUT_WORD (output_bfd,
4827 (bfd_get_section_vma (output_bfd,
4828 obj_textsec (input_bfd)->output_section)
4829 + obj_textsec (input_bfd)->output_offset),
4830 outsym->e_value);
4831 ++obj_aout_external_sym_count (output_bfd);
4832 ++outsym;
4833 }
4834
4835 pass = FALSE;
4836 skip_next = FALSE;
4837 sym = obj_aout_external_syms (input_bfd);
4838 sym_end = sym + sym_count;
4839 sym_hash = obj_aout_sym_hashes (input_bfd);
4840 symbol_map = flaginfo->symbol_map;
4841 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4842 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4843 {
4844 const char *name;
4845 int type;
4846 struct aout_link_hash_entry *h;
4847 bfd_boolean skip;
4848 asection *symsec;
4849 bfd_vma val = 0;
4850 bfd_boolean copy;
4851
4852 /* We set *symbol_map to 0 above for all symbols. If it has
4853 already been set to -1 for this symbol, it means that we are
4854 discarding it because it appears in a duplicate header file.
4855 See the N_BINCL code below. */
4856 if (*symbol_map == -1)
4857 continue;
4858
4859 /* Initialize *symbol_map to -1, which means that the symbol was
4860 not copied into the output file. We will change it later if
4861 we do copy the symbol over. */
4862 *symbol_map = -1;
4863
4864 type = H_GET_8 (input_bfd, sym->e_type);
4865 name = strings + GET_WORD (input_bfd, sym->e_strx);
4866
4867 h = NULL;
4868
4869 if (pass)
4870 {
4871 /* Pass this symbol through. It is the target of an
4872 indirect or warning symbol. */
4873 val = GET_WORD (input_bfd, sym->e_value);
4874 pass = FALSE;
4875 }
4876 else if (skip_next)
4877 {
4878 /* Skip this symbol, which is the target of an indirect
4879 symbol that we have changed to no longer be an indirect
4880 symbol. */
4881 skip_next = FALSE;
4882 continue;
4883 }
4884 else
4885 {
4886 struct aout_link_hash_entry *hresolve;
4887
4888 /* We have saved the hash table entry for this symbol, if
4889 there is one. Note that we could just look it up again
4890 in the hash table, provided we first check that it is an
4891 external symbol. */
4892 h = *sym_hash;
4893
4894 /* Use the name from the hash table, in case the symbol was
4895 wrapped. */
4896 if (h != NULL
4897 && h->root.type != bfd_link_hash_warning)
4898 name = h->root.root.string;
4899
4900 /* If this is an indirect or warning symbol, then change
4901 hresolve to the base symbol. We also change *sym_hash so
4902 that the relocation routines relocate against the real
4903 symbol. */
4904 hresolve = h;
4905 if (h != (struct aout_link_hash_entry *) NULL
4906 && (h->root.type == bfd_link_hash_indirect
4907 || h->root.type == bfd_link_hash_warning))
4908 {
4909 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4910 while (hresolve->root.type == bfd_link_hash_indirect
4911 || hresolve->root.type == bfd_link_hash_warning)
4912 hresolve = ((struct aout_link_hash_entry *)
4913 hresolve->root.u.i.link);
4914 *sym_hash = hresolve;
4915 }
4916
4917 /* If the symbol has already been written out, skip it. */
4918 if (h != NULL
4919 && h->written)
4920 {
4921 if ((type & N_TYPE) == N_INDR
4922 || type == N_WARNING)
4923 skip_next = TRUE;
4924 *symbol_map = h->indx;
4925 continue;
4926 }
4927
4928 /* See if we are stripping this symbol. */
4929 skip = FALSE;
4930 switch (strip)
4931 {
4932 case strip_none:
4933 break;
4934 case strip_debugger:
4935 if ((type & N_STAB) != 0)
4936 skip = TRUE;
4937 break;
4938 case strip_some:
4939 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
4940 == NULL)
4941 skip = TRUE;
4942 break;
4943 case strip_all:
4944 skip = TRUE;
4945 break;
4946 }
4947 if (skip)
4948 {
4949 if (h != NULL)
4950 h->written = TRUE;
4951 continue;
4952 }
4953
4954 /* Get the value of the symbol. */
4955 if ((type & N_TYPE) == N_TEXT
4956 || type == N_WEAKT)
4957 symsec = obj_textsec (input_bfd);
4958 else if ((type & N_TYPE) == N_DATA
4959 || type == N_WEAKD)
4960 symsec = obj_datasec (input_bfd);
4961 else if ((type & N_TYPE) == N_BSS
4962 || type == N_WEAKB)
4963 symsec = obj_bsssec (input_bfd);
4964 else if ((type & N_TYPE) == N_ABS
4965 || type == N_WEAKA)
4966 symsec = bfd_abs_section_ptr;
4967 else if (((type & N_TYPE) == N_INDR
4968 && (hresolve == NULL
4969 || (hresolve->root.type != bfd_link_hash_defined
4970 && hresolve->root.type != bfd_link_hash_defweak
4971 && hresolve->root.type != bfd_link_hash_common)))
4972 || type == N_WARNING)
4973 {
4974 /* Pass the next symbol through unchanged. The
4975 condition above for indirect symbols is so that if
4976 the indirect symbol was defined, we output it with
4977 the correct definition so the debugger will
4978 understand it. */
4979 pass = TRUE;
4980 val = GET_WORD (input_bfd, sym->e_value);
4981 symsec = NULL;
4982 }
4983 else if ((type & N_STAB) != 0)
4984 {
4985 val = GET_WORD (input_bfd, sym->e_value);
4986 symsec = NULL;
4987 }
4988 else
4989 {
4990 /* If we get here with an indirect symbol, it means that
4991 we are outputting it with a real definition. In such
4992 a case we do not want to output the next symbol,
4993 which is the target of the indirection. */
4994 if ((type & N_TYPE) == N_INDR)
4995 skip_next = TRUE;
4996
4997 symsec = NULL;
4998
4999 /* We need to get the value from the hash table. We use
5000 hresolve so that if we have defined an indirect
5001 symbol we output the final definition. */
5002 if (h == NULL)
5003 {
5004 switch (type & N_TYPE)
5005 {
5006 case N_SETT:
5007 symsec = obj_textsec (input_bfd);
5008 break;
5009 case N_SETD:
5010 symsec = obj_datasec (input_bfd);
5011 break;
5012 case N_SETB:
5013 symsec = obj_bsssec (input_bfd);
5014 break;
5015 case N_SETA:
5016 symsec = bfd_abs_section_ptr;
5017 break;
5018 default:
5019 val = 0;
5020 break;
5021 }
5022 }
5023 else if (hresolve->root.type == bfd_link_hash_defined
5024 || hresolve->root.type == bfd_link_hash_defweak)
5025 {
5026 asection *input_section;
5027 asection *output_section;
5028
5029 /* This case usually means a common symbol which was
5030 turned into a defined symbol. */
5031 input_section = hresolve->root.u.def.section;
5032 output_section = input_section->output_section;
5033 BFD_ASSERT (bfd_is_abs_section (output_section)
5034 || output_section->owner == output_bfd);
5035 val = (hresolve->root.u.def.value
5036 + bfd_get_section_vma (output_bfd, output_section)
5037 + input_section->output_offset);
5038
5039 /* Get the correct type based on the section. If
5040 this is a constructed set, force it to be
5041 globally visible. */
5042 if (type == N_SETT
5043 || type == N_SETD
5044 || type == N_SETB
5045 || type == N_SETA)
5046 type |= N_EXT;
5047
5048 type &=~ N_TYPE;
5049
5050 if (output_section == obj_textsec (output_bfd))
5051 type |= (hresolve->root.type == bfd_link_hash_defined
5052 ? N_TEXT
5053 : N_WEAKT);
5054 else if (output_section == obj_datasec (output_bfd))
5055 type |= (hresolve->root.type == bfd_link_hash_defined
5056 ? N_DATA
5057 : N_WEAKD);
5058 else if (output_section == obj_bsssec (output_bfd))
5059 type |= (hresolve->root.type == bfd_link_hash_defined
5060 ? N_BSS
5061 : N_WEAKB);
5062 else
5063 type |= (hresolve->root.type == bfd_link_hash_defined
5064 ? N_ABS
5065 : N_WEAKA);
5066 }
5067 else if (hresolve->root.type == bfd_link_hash_common)
5068 val = hresolve->root.u.c.size;
5069 else if (hresolve->root.type == bfd_link_hash_undefweak)
5070 {
5071 val = 0;
5072 type = N_WEAKU;
5073 }
5074 else
5075 val = 0;
5076 }
5077 if (symsec != NULL)
5078 val = (symsec->output_section->vma
5079 + symsec->output_offset
5080 + (GET_WORD (input_bfd, sym->e_value)
5081 - symsec->vma));
5082
5083 /* If this is a global symbol set the written flag, and if
5084 it is a local symbol see if we should discard it. */
5085 if (h != NULL)
5086 {
5087 h->written = TRUE;
5088 h->indx = obj_aout_external_sym_count (output_bfd);
5089 }
5090 else if ((type & N_TYPE) != N_SETT
5091 && (type & N_TYPE) != N_SETD
5092 && (type & N_TYPE) != N_SETB
5093 && (type & N_TYPE) != N_SETA)
5094 {
5095 switch (discard)
5096 {
5097 case discard_none:
5098 case discard_sec_merge:
5099 break;
5100 case discard_l:
5101 if ((type & N_STAB) == 0
5102 && bfd_is_local_label_name (input_bfd, name))
5103 skip = TRUE;
5104 break;
5105 case discard_all:
5106 skip = TRUE;
5107 break;
5108 }
5109 if (skip)
5110 {
5111 pass = FALSE;
5112 continue;
5113 }
5114 }
5115
5116 /* An N_BINCL symbol indicates the start of the stabs
5117 entries for a header file. We need to scan ahead to the
5118 next N_EINCL symbol, ignoring nesting, adding up all the
5119 characters in the symbol names, not including the file
5120 numbers in types (the first number after an open
5121 parenthesis). */
5122 if (type == (int) N_BINCL)
5123 {
5124 struct external_nlist *incl_sym;
5125 int nest;
5126 struct aout_link_includes_entry *incl_entry;
5127 struct aout_link_includes_totals *t;
5128
5129 val = 0;
5130 nest = 0;
5131 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5132 {
5133 int incl_type;
5134
5135 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5136 if (incl_type == (int) N_EINCL)
5137 {
5138 if (nest == 0)
5139 break;
5140 --nest;
5141 }
5142 else if (incl_type == (int) N_BINCL)
5143 ++nest;
5144 else if (nest == 0)
5145 {
5146 const char *s;
5147
5148 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5149 for (; *s != '\0'; s++)
5150 {
5151 val += *s;
5152 if (*s == '(')
5153 {
5154 /* Skip the file number. */
5155 ++s;
5156 while (ISDIGIT (*s))
5157 ++s;
5158 --s;
5159 }
5160 }
5161 }
5162 }
5163
5164 /* If we have already included a header file with the
5165 same value, then replace this one with an N_EXCL
5166 symbol. */
5167 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5168 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5169 name, TRUE, copy);
5170 if (incl_entry == NULL)
5171 return FALSE;
5172 for (t = incl_entry->totals; t != NULL; t = t->next)
5173 if (t->total == val)
5174 break;
5175 if (t == NULL)
5176 {
5177 /* This is the first time we have seen this header
5178 file with this set of stabs strings. */
5179 t = (struct aout_link_includes_totals *)
5180 bfd_hash_allocate (&flaginfo->includes.root,
5181 sizeof *t);
5182 if (t == NULL)
5183 return FALSE;
5184 t->total = val;
5185 t->next = incl_entry->totals;
5186 incl_entry->totals = t;
5187 }
5188 else
5189 {
5190 int *incl_map;
5191
5192 /* This is a duplicate header file. We must change
5193 it to be an N_EXCL entry, and mark all the
5194 included symbols to prevent outputting them. */
5195 type = (int) N_EXCL;
5196
5197 nest = 0;
5198 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5199 incl_sym < sym_end;
5200 incl_sym++, incl_map++)
5201 {
5202 int incl_type;
5203
5204 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5205 if (incl_type == (int) N_EINCL)
5206 {
5207 if (nest == 0)
5208 {
5209 *incl_map = -1;
5210 break;
5211 }
5212 --nest;
5213 }
5214 else if (incl_type == (int) N_BINCL)
5215 ++nest;
5216 else if (nest == 0)
5217 *incl_map = -1;
5218 }
5219 }
5220 }
5221 }
5222
5223 /* Copy this symbol into the list of symbols we are going to
5224 write out. */
5225 H_PUT_8 (output_bfd, type, outsym->e_type);
5226 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5227 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5228 copy = FALSE;
5229 if (! flaginfo->info->keep_memory)
5230 {
5231 /* name points into a string table which we are going to
5232 free. If there is a hash table entry, use that string.
5233 Otherwise, copy name into memory. */
5234 if (h != NULL)
5235 name = h->root.root.string;
5236 else
5237 copy = TRUE;
5238 }
5239 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5240 name, copy);
5241 if (strtab_index == (bfd_size_type) -1)
5242 return FALSE;
5243 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5244 PUT_WORD (output_bfd, val, outsym->e_value);
5245 *symbol_map = obj_aout_external_sym_count (output_bfd);
5246 ++obj_aout_external_sym_count (output_bfd);
5247 ++outsym;
5248 }
5249
5250 /* Write out the output symbols we have just constructed. */
5251 if (outsym > flaginfo->output_syms)
5252 {
5253 bfd_size_type outsym_size;
5254
5255 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5256 return FALSE;
5257 outsym_size = outsym - flaginfo->output_syms;
5258 outsym_size *= EXTERNAL_NLIST_SIZE;
5259 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5260 != outsym_size)
5261 return FALSE;
5262 flaginfo->symoff += outsym_size;
5263 }
5264
5265 return TRUE;
5266 }
5267
5268 /* Link an a.out input BFD into the output file. */
5269
5270 static bfd_boolean
5271 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5272 {
5273 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5274
5275 /* If this is a dynamic object, it may need special handling. */
5276 if ((input_bfd->flags & DYNAMIC) != 0
5277 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5278 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5279 (flaginfo->info, input_bfd));
5280
5281 /* Get the symbols. We probably have them already, unless
5282 flaginfo->info->keep_memory is FALSE. */
5283 if (! aout_get_external_symbols (input_bfd))
5284 return FALSE;
5285
5286 /* Write out the symbols and get a map of the new indices. The map
5287 is placed into flaginfo->symbol_map. */
5288 if (! aout_link_write_symbols (flaginfo, input_bfd))
5289 return FALSE;
5290
5291 /* Relocate and write out the sections. These functions use the
5292 symbol map created by aout_link_write_symbols. The linker_mark
5293 field will be set if these sections are to be included in the
5294 link, which will normally be the case. */
5295 if (obj_textsec (input_bfd)->linker_mark)
5296 {
5297 if (! aout_link_input_section (flaginfo, input_bfd,
5298 obj_textsec (input_bfd),
5299 &flaginfo->treloff,
5300 exec_hdr (input_bfd)->a_trsize))
5301 return FALSE;
5302 }
5303 if (obj_datasec (input_bfd)->linker_mark)
5304 {
5305 if (! aout_link_input_section (flaginfo, input_bfd,
5306 obj_datasec (input_bfd),
5307 &flaginfo->dreloff,
5308 exec_hdr (input_bfd)->a_drsize))
5309 return FALSE;
5310 }
5311
5312 /* If we are not keeping memory, we don't need the symbols any
5313 longer. We still need them if we are keeping memory, because the
5314 strings in the hash table point into them. */
5315 if (! flaginfo->info->keep_memory)
5316 {
5317 if (! aout_link_free_symbols (input_bfd))
5318 return FALSE;
5319 }
5320
5321 return TRUE;
5322 }
5323
5324 /* Do the final link step. This is called on the output BFD. The
5325 INFO structure should point to a list of BFDs linked through the
5326 link.next field which can be used to find each BFD which takes part
5327 in the output. Also, each section in ABFD should point to a list
5328 of bfd_link_order structures which list all the input sections for
5329 the output section. */
5330
5331 bfd_boolean
5332 NAME (aout, final_link) (bfd *abfd,
5333 struct bfd_link_info *info,
5334 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5335 {
5336 struct aout_final_link_info aout_info;
5337 bfd_boolean includes_hash_initialized = FALSE;
5338 bfd *sub;
5339 bfd_size_type trsize, drsize;
5340 bfd_size_type max_contents_size;
5341 bfd_size_type max_relocs_size;
5342 bfd_size_type max_sym_count;
5343 bfd_size_type text_size;
5344 file_ptr text_end;
5345 struct bfd_link_order *p;
5346 asection *o;
5347 bfd_boolean have_link_order_relocs;
5348
5349 if (info->shared)
5350 abfd->flags |= DYNAMIC;
5351
5352 aout_info.info = info;
5353 aout_info.output_bfd = abfd;
5354 aout_info.contents = NULL;
5355 aout_info.relocs = NULL;
5356 aout_info.symbol_map = NULL;
5357 aout_info.output_syms = NULL;
5358
5359 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5360 aout_link_includes_newfunc,
5361 sizeof (struct aout_link_includes_entry),
5362 251))
5363 goto error_return;
5364 includes_hash_initialized = TRUE;
5365
5366 /* Figure out the largest section size. Also, if generating
5367 relocatable output, count the relocs. */
5368 trsize = 0;
5369 drsize = 0;
5370 max_contents_size = 0;
5371 max_relocs_size = 0;
5372 max_sym_count = 0;
5373 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5374 {
5375 bfd_size_type sz;
5376
5377 if (info->relocatable)
5378 {
5379 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5380 {
5381 trsize += exec_hdr (sub)->a_trsize;
5382 drsize += exec_hdr (sub)->a_drsize;
5383 }
5384 else
5385 {
5386 /* FIXME: We need to identify the .text and .data sections
5387 and call get_reloc_upper_bound and canonicalize_reloc to
5388 work out the number of relocs needed, and then multiply
5389 by the reloc size. */
5390 (*_bfd_error_handler)
5391 (_("%s: relocatable link from %s to %s not supported"),
5392 bfd_get_filename (abfd),
5393 sub->xvec->name, abfd->xvec->name);
5394 bfd_set_error (bfd_error_invalid_operation);
5395 goto error_return;
5396 }
5397 }
5398
5399 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5400 {
5401 sz = obj_textsec (sub)->size;
5402 if (sz > max_contents_size)
5403 max_contents_size = sz;
5404 sz = obj_datasec (sub)->size;
5405 if (sz > max_contents_size)
5406 max_contents_size = sz;
5407
5408 sz = exec_hdr (sub)->a_trsize;
5409 if (sz > max_relocs_size)
5410 max_relocs_size = sz;
5411 sz = exec_hdr (sub)->a_drsize;
5412 if (sz > max_relocs_size)
5413 max_relocs_size = sz;
5414
5415 sz = obj_aout_external_sym_count (sub);
5416 if (sz > max_sym_count)
5417 max_sym_count = sz;
5418 }
5419 }
5420
5421 if (info->relocatable)
5422 {
5423 if (obj_textsec (abfd) != NULL)
5424 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5425 ->map_head.link_order)
5426 * obj_reloc_entry_size (abfd));
5427 if (obj_datasec (abfd) != NULL)
5428 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5429 ->map_head.link_order)
5430 * obj_reloc_entry_size (abfd));
5431 }
5432
5433 exec_hdr (abfd)->a_trsize = trsize;
5434 exec_hdr (abfd)->a_drsize = drsize;
5435
5436 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5437
5438 /* Adjust the section sizes and vmas according to the magic number.
5439 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5440 filepos for each section. */
5441 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5442 goto error_return;
5443
5444 /* The relocation and symbol file positions differ among a.out
5445 targets. We are passed a callback routine from the backend
5446 specific code to handle this.
5447 FIXME: At this point we do not know how much space the symbol
5448 table will require. This will not work for any (nonstandard)
5449 a.out target that needs to know the symbol table size before it
5450 can compute the relocation file positions. This may or may not
5451 be the case for the hp300hpux target, for example. */
5452 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5453 &aout_info.symoff);
5454 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5455 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5456 obj_sym_filepos (abfd) = aout_info.symoff;
5457
5458 /* We keep a count of the symbols as we output them. */
5459 obj_aout_external_sym_count (abfd) = 0;
5460
5461 /* We accumulate the string table as we write out the symbols. */
5462 aout_info.strtab = _bfd_stringtab_init ();
5463 if (aout_info.strtab == NULL)
5464 goto error_return;
5465
5466 /* Allocate buffers to hold section contents and relocs. */
5467 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5468 aout_info.relocs = bfd_malloc (max_relocs_size);
5469 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5470 aout_info.output_syms = (struct external_nlist *)
5471 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5472 if ((aout_info.contents == NULL && max_contents_size != 0)
5473 || (aout_info.relocs == NULL && max_relocs_size != 0)
5474 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5475 || aout_info.output_syms == NULL)
5476 goto error_return;
5477
5478 /* If we have a symbol named __DYNAMIC, force it out now. This is
5479 required by SunOS. Doing this here rather than in sunos.c is a
5480 hack, but it's easier than exporting everything which would be
5481 needed. */
5482 {
5483 struct aout_link_hash_entry *h;
5484
5485 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5486 FALSE, FALSE, FALSE);
5487 if (h != NULL)
5488 aout_link_write_other_symbol (&h->root.root, &aout_info);
5489 }
5490
5491 /* The most time efficient way to do the link would be to read all
5492 the input object files into memory and then sort out the
5493 information into the output file. Unfortunately, that will
5494 probably use too much memory. Another method would be to step
5495 through everything that composes the text section and write it
5496 out, and then everything that composes the data section and write
5497 it out, and then write out the relocs, and then write out the
5498 symbols. Unfortunately, that requires reading stuff from each
5499 input file several times, and we will not be able to keep all the
5500 input files open simultaneously, and reopening them will be slow.
5501
5502 What we do is basically process one input file at a time. We do
5503 everything we need to do with an input file once--copy over the
5504 section contents, handle the relocation information, and write
5505 out the symbols--and then we throw away the information we read
5506 from it. This approach requires a lot of lseeks of the output
5507 file, which is unfortunate but still faster than reopening a lot
5508 of files.
5509
5510 We use the output_has_begun field of the input BFDs to see
5511 whether we have already handled it. */
5512 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5513 sub->output_has_begun = FALSE;
5514
5515 /* Mark all sections which are to be included in the link. This
5516 will normally be every section. We need to do this so that we
5517 can identify any sections which the linker has decided to not
5518 include. */
5519 for (o = abfd->sections; o != NULL; o = o->next)
5520 {
5521 for (p = o->map_head.link_order; p != NULL; p = p->next)
5522 if (p->type == bfd_indirect_link_order)
5523 p->u.indirect.section->linker_mark = TRUE;
5524 }
5525
5526 have_link_order_relocs = FALSE;
5527 for (o = abfd->sections; o != NULL; o = o->next)
5528 {
5529 for (p = o->map_head.link_order;
5530 p != NULL;
5531 p = p->next)
5532 {
5533 if (p->type == bfd_indirect_link_order
5534 && (bfd_get_flavour (p->u.indirect.section->owner)
5535 == bfd_target_aout_flavour))
5536 {
5537 bfd *input_bfd;
5538
5539 input_bfd = p->u.indirect.section->owner;
5540 if (! input_bfd->output_has_begun)
5541 {
5542 if (! aout_link_input_bfd (&aout_info, input_bfd))
5543 goto error_return;
5544 input_bfd->output_has_begun = TRUE;
5545 }
5546 }
5547 else if (p->type == bfd_section_reloc_link_order
5548 || p->type == bfd_symbol_reloc_link_order)
5549 {
5550 /* These are handled below. */
5551 have_link_order_relocs = TRUE;
5552 }
5553 else
5554 {
5555 if (! _bfd_default_link_order (abfd, info, o, p))
5556 goto error_return;
5557 }
5558 }
5559 }
5560
5561 /* Write out any symbols that we have not already written out. */
5562 bfd_hash_traverse (&info->hash->table,
5563 aout_link_write_other_symbol,
5564 &aout_info);
5565
5566 /* Now handle any relocs we were asked to create by the linker.
5567 These did not come from any input file. We must do these after
5568 we have written out all the symbols, so that we know the symbol
5569 indices to use. */
5570 if (have_link_order_relocs)
5571 {
5572 for (o = abfd->sections; o != NULL; o = o->next)
5573 {
5574 for (p = o->map_head.link_order;
5575 p != NULL;
5576 p = p->next)
5577 {
5578 if (p->type == bfd_section_reloc_link_order
5579 || p->type == bfd_symbol_reloc_link_order)
5580 {
5581 if (! aout_link_reloc_link_order (&aout_info, o, p))
5582 goto error_return;
5583 }
5584 }
5585 }
5586 }
5587
5588 if (aout_info.contents != NULL)
5589 {
5590 free (aout_info.contents);
5591 aout_info.contents = NULL;
5592 }
5593 if (aout_info.relocs != NULL)
5594 {
5595 free (aout_info.relocs);
5596 aout_info.relocs = NULL;
5597 }
5598 if (aout_info.symbol_map != NULL)
5599 {
5600 free (aout_info.symbol_map);
5601 aout_info.symbol_map = NULL;
5602 }
5603 if (aout_info.output_syms != NULL)
5604 {
5605 free (aout_info.output_syms);
5606 aout_info.output_syms = NULL;
5607 }
5608 if (includes_hash_initialized)
5609 {
5610 bfd_hash_table_free (&aout_info.includes.root);
5611 includes_hash_initialized = FALSE;
5612 }
5613
5614 /* Finish up any dynamic linking we may be doing. */
5615 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5616 {
5617 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5618 goto error_return;
5619 }
5620
5621 /* Update the header information. */
5622 abfd->symcount = obj_aout_external_sym_count (abfd);
5623 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5624 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5625 obj_textsec (abfd)->reloc_count =
5626 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5627 obj_datasec (abfd)->reloc_count =
5628 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5629
5630 /* Write out the string table, unless there are no symbols. */
5631 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5632 goto error_return;
5633 if (abfd->symcount > 0)
5634 {
5635 if (!emit_stringtab (abfd, aout_info.strtab))
5636 goto error_return;
5637 }
5638 else
5639 {
5640 bfd_byte b[BYTES_IN_WORD];
5641
5642 memset (b, 0, BYTES_IN_WORD);
5643 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5644 goto error_return;
5645 }
5646
5647 return TRUE;
5648
5649 error_return:
5650 if (aout_info.contents != NULL)
5651 free (aout_info.contents);
5652 if (aout_info.relocs != NULL)
5653 free (aout_info.relocs);
5654 if (aout_info.symbol_map != NULL)
5655 free (aout_info.symbol_map);
5656 if (aout_info.output_syms != NULL)
5657 free (aout_info.output_syms);
5658 if (includes_hash_initialized)
5659 bfd_hash_table_free (&aout_info.includes.root);
5660 return FALSE;
5661 }
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