projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Add MIPS V and MIPS 64 machine numbers
[deliverable/binutils-gdb.git] / bfd / aoutx.h
CommitLineData
252b5132 1/* BFD semi-generic back-end for a.out binaries.
5af11cab 2 Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
252b5132
RH		 3 Free Software Foundation, Inc.
4 Written by Cygnus Support.
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22/*
23SECTION
24 a.out backends
25
252b5132
RH		 26DESCRIPTION
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 sunos_big_vec
70| #include "aoutf1.h"
71
72 requires all the names from @file{aout32.c}, and produces the jump vector
73
74| sunos_big_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.in}
105 to use the
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected.
108
109*/
110
111/* Some assumptions:
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
114 get set on input.
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
119
120#define KEEPIT udata.i
121
122#include <ctype.h>
123#include "bfd.h"
124#include "sysdep.h"
125#include "bfdlink.h"
126
127#include "libaout.h"
128#include "libbfd.h"
129#include "aout/aout64.h"
130#include "aout/stab_gnu.h"
131#include "aout/ar.h"
132
133static boolean aout_get_external_symbols PARAMS ((bfd *));
134static boolean translate_from_native_sym_flags
135 PARAMS ((bfd *, aout_symbol_type *));
136static boolean translate_to_native_sym_flags
137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
138static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *));
139static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *));
140static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *));
141
142/*
143SUBSECTION
144 Relocations
145
146DESCRIPTION
147 The file @file{aoutx.h} provides for both the @emph{standard}
148 and @emph{extended} forms of a.out relocation records.
149
150 The standard records contain only an
151 address, a symbol index, and a type field. The extended records
152 (used on 29ks and sparcs) also have a full integer for an
153 addend.
154
155*/
156#ifndef CTOR_TABLE_RELOC_HOWTO
157#define CTOR_TABLE_RELOC_IDX 2
158#define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
159 ? howto_table_ext : howto_table_std) \
160 + CTOR_TABLE_RELOC_IDX)
161#endif
162
163#ifndef MY_swap_std_reloc_in
164#define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
165#endif
166
1642229e
HPN		 167#ifndef MY_swap_ext_reloc_in
168#define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in)
169#endif
170
252b5132
RH		 171#ifndef MY_swap_std_reloc_out
172#define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
173#endif
174
1642229e
HPN		 175#ifndef MY_swap_ext_reloc_out
176#define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out)
177#endif
178
252b5132
RH		 179#ifndef MY_final_link_relocate
180#define MY_final_link_relocate _bfd_final_link_relocate
181#endif
182
183#ifndef MY_relocate_contents
184#define MY_relocate_contents _bfd_relocate_contents
185#endif
186
187#define howto_table_ext NAME(aout,ext_howto_table)
188#define howto_table_std NAME(aout,std_howto_table)
189
190reloc_howto_type howto_table_ext[] =
191{
192 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
193 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
194 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
195 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
196 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
197 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
198 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
199 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
200 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
201 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
202 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
203 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
204 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
205 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
206 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
207 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false),
208 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false),
209 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false),
210 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
211 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
212 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
213 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
214 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
215 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
216 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
217 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
218 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
219#define RELOC_SPARC_REV32 RELOC_WDISP19
220 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false),
221};
222
223/* Convert standard reloc records to "arelent" format (incl byte swap). */
224
225reloc_howto_type howto_table_std[] = {
226 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
227HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
228HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
229HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
230HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
231HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
232HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
233HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
234HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
235HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
236HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
237HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
5f771d47
ILT		 238EMPTY_HOWTO (-1),
239EMPTY_HOWTO (-1),
240EMPTY_HOWTO (-1),
241EMPTY_HOWTO (-1),
242EMPTY_HOWTO (-1),
252b5132 243 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
5f771d47
ILT		 244EMPTY_HOWTO (-1),
245EMPTY_HOWTO (-1),
246EMPTY_HOWTO (-1),
247EMPTY_HOWTO (-1),
248EMPTY_HOWTO (-1),
249EMPTY_HOWTO (-1),
250EMPTY_HOWTO (-1),
251EMPTY_HOWTO (-1),
252EMPTY_HOWTO (-1),
253EMPTY_HOWTO (-1),
254EMPTY_HOWTO (-1),
255EMPTY_HOWTO (-1),
256EMPTY_HOWTO (-1),
257EMPTY_HOWTO (-1),
258EMPTY_HOWTO (-1),
252b5132 259 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
5f771d47
ILT		 260EMPTY_HOWTO (-1),
261EMPTY_HOWTO (-1),
262EMPTY_HOWTO (-1),
263EMPTY_HOWTO (-1),
264EMPTY_HOWTO (-1),
265EMPTY_HOWTO (-1),
266EMPTY_HOWTO (-1),
252b5132
RH		 267 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
268};
269
beb0d161 270#define TABLE_SIZE(TABLE) (sizeof (TABLE)/sizeof (TABLE[0]))
252b5132
RH		 271
272reloc_howto_type *
273NAME(aout,reloc_type_lookup) (abfd,code)
274 bfd *abfd;
275 bfd_reloc_code_real_type code;
276{
277#define EXT(i,j) case i: return &howto_table_ext[j]
278#define STD(i,j) case i: return &howto_table_std[j]
279 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
280 if (code == BFD_RELOC_CTOR)
281 switch (bfd_get_arch_info (abfd)->bits_per_address)
282 {
283 case 32:
284 code = BFD_RELOC_32;
285 break;
286 case 64:
287 code = BFD_RELOC_64;
288 break;
289 }
290 if (ext)
291 switch (code)
292 {
1642229e
HPN		 293 EXT (BFD_RELOC_8, 0);
294 EXT (BFD_RELOC_16, 1);
252b5132
RH		 295 EXT (BFD_RELOC_32, 2);
296 EXT (BFD_RELOC_HI22, 8);
297 EXT (BFD_RELOC_LO10, 11);
298 EXT (BFD_RELOC_32_PCREL_S2, 6);
299 EXT (BFD_RELOC_SPARC_WDISP22, 7);
300 EXT (BFD_RELOC_SPARC13, 10);
301 EXT (BFD_RELOC_SPARC_GOT10, 14);
302 EXT (BFD_RELOC_SPARC_BASE13, 15);
303 EXT (BFD_RELOC_SPARC_GOT13, 15);
304 EXT (BFD_RELOC_SPARC_GOT22, 16);
305 EXT (BFD_RELOC_SPARC_PC10, 17);
306 EXT (BFD_RELOC_SPARC_PC22, 18);
307 EXT (BFD_RELOC_SPARC_WPLT30, 19);
308 EXT (BFD_RELOC_SPARC_REV32, 26);
309 default: return (reloc_howto_type *) NULL;
310 }
311 else
312 /* std relocs */
313 switch (code)
314 {
315 STD (BFD_RELOC_16, 1);
316 STD (BFD_RELOC_32, 2);
317 STD (BFD_RELOC_8_PCREL, 4);
318 STD (BFD_RELOC_16_PCREL, 5);
319 STD (BFD_RELOC_32_PCREL, 6);
320 STD (BFD_RELOC_16_BASEREL, 9);
321 STD (BFD_RELOC_32_BASEREL, 10);
322 default: return (reloc_howto_type *) NULL;
323 }
324}
325
326/*
327SUBSECTION
328 Internal entry points
329
330DESCRIPTION
331 @file{aoutx.h} exports several routines for accessing the
332 contents of an a.out file, which are gathered and exported in
333 turn by various format specific files (eg sunos.c).
334
335*/
336
337/*
338FUNCTION
339 aout_@var{size}_swap_exec_header_in
340
341SYNOPSIS
342 void aout_@var{size}_swap_exec_header_in,
343 (bfd *abfd,
344 struct external_exec *raw_bytes,
345 struct internal_exec *execp);
346
347DESCRIPTION
348 Swap the information in an executable header @var{raw_bytes} taken
349 from a raw byte stream memory image into the internal exec header
350 structure @var{execp}.
351*/
352
353#ifndef NAME_swap_exec_header_in
354void
355NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
356 bfd *abfd;
357 struct external_exec *raw_bytes;
358 struct internal_exec *execp;
359{
360 struct external_exec *bytes = (struct external_exec *)raw_bytes;
361
362 /* The internal_exec structure has some fields that are unused in this
363 configuration (IE for i960), so ensure that all such uninitialized
364 fields are zero'd out. There are places where two of these structs
0ef5a5bd 365 are memcmp'd, and thus the contents do matter. */
252b5132
RH		 366 memset ((PTR) execp, 0, sizeof (struct internal_exec));
367 /* Now fill in fields in the execp, from the bytes in the raw data. */
368 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
369 execp->a_text = GET_WORD (abfd, bytes->e_text);
370 execp->a_data = GET_WORD (abfd, bytes->e_data);
371 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
372 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
373 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
374 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
375 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
376}
377#define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
378#endif
379
380/*
381FUNCTION
382 aout_@var{size}_swap_exec_header_out
383
384SYNOPSIS
385 void aout_@var{size}_swap_exec_header_out
386 (bfd *abfd,
387 struct internal_exec *execp,
388 struct external_exec *raw_bytes);
389
390DESCRIPTION
391 Swap the information in an internal exec header structure
392 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
393*/
394void
395NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
396 bfd *abfd;
397 struct internal_exec *execp;
398 struct external_exec *raw_bytes;
399{
400 struct external_exec *bytes = (struct external_exec *)raw_bytes;
401
0ef5a5bd 402 /* Now fill in fields in the raw data, from the fields in the exec struct. */
252b5132
RH		 403 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
404 PUT_WORD (abfd, execp->a_text , bytes->e_text);
405 PUT_WORD (abfd, execp->a_data , bytes->e_data);
406 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
407 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
408 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
409 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
410 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
411}
412
413/* Make all the section for an a.out file. */
414
415boolean
416NAME(aout,make_sections) (abfd)
417 bfd *abfd;
418{
419 if (obj_textsec (abfd) == (asection *) NULL
420 && bfd_make_section (abfd, ".text") == (asection *) NULL)
421 return false;
422 if (obj_datasec (abfd) == (asection *) NULL
423 && bfd_make_section (abfd, ".data") == (asection *) NULL)
424 return false;
425 if (obj_bsssec (abfd) == (asection *) NULL
426 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
427 return false;
428 return true;
429}
430
431/*
432FUNCTION
433 aout_@var{size}_some_aout_object_p
434
435SYNOPSIS
436 const bfd_target *aout_@var{size}_some_aout_object_p
437 (bfd *abfd,
beb0d161 438 const bfd_target *(*callback_to_real_object_p) ());
252b5132
RH		 439
440DESCRIPTION
441 Some a.out variant thinks that the file open in @var{abfd}
442 checking is an a.out file. Do some more checking, and set up
443 for access if it really is. Call back to the calling
444 environment's "finish up" function just before returning, to
445 handle any last-minute setup.
446*/
447
448const bfd_target *
449NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
450 bfd *abfd;
451 struct internal_exec *execp;
452 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
453{
454 struct aout_data_struct *rawptr, *oldrawptr;
455 const bfd_target *result;
456
457 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
458 if (rawptr == NULL)
459 return 0;
460
461 oldrawptr = abfd->tdata.aout_data;
462 abfd->tdata.aout_data = rawptr;
463
464 /* Copy the contents of the old tdata struct.
465 In particular, we want the subformat, since for hpux it was set in
466 hp300hpux.c:swap_exec_header_in and will be used in
467 hp300hpux.c:callback. */
468 if (oldrawptr != NULL)
469 *abfd->tdata.aout_data = *oldrawptr;
470
471 abfd->tdata.aout_data->a.hdr = &rawptr->e;
472 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
473 execp = abfd->tdata.aout_data->a.hdr;
474
475 /* Set the file flags */
476 abfd->flags = BFD_NO_FLAGS;
477 if (execp->a_drsize || execp->a_trsize)
478 abfd->flags |= HAS_RELOC;
479 /* Setting of EXEC_P has been deferred to the bottom of this function */
480 if (execp->a_syms)
481 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
482 if (N_DYNAMIC(*execp))
483 abfd->flags |= DYNAMIC;
484
485 if (N_MAGIC (*execp) == ZMAGIC)
486 {
487 abfd->flags |= D_PAGED | WP_TEXT;
488 adata (abfd).magic = z_magic;
489 }
490 else if (N_MAGIC (*execp) == QMAGIC)
491 {
492 abfd->flags |= D_PAGED | WP_TEXT;
493 adata (abfd).magic = z_magic;
494 adata (abfd).subformat = q_magic_format;
495 }
496 else if (N_MAGIC (*execp) == NMAGIC)
497 {
498 abfd->flags |= WP_TEXT;
499 adata (abfd).magic = n_magic;
500 }
501 else if (N_MAGIC (*execp) == OMAGIC
502 || N_MAGIC (*execp) == BMAGIC)
503 adata (abfd).magic = o_magic;
504 else
505 {
506 /* Should have been checked with N_BADMAG before this routine
507 was called. */
508 abort ();
509 }
510
511 bfd_get_start_address (abfd) = execp->a_entry;
512
513 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
514 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
515
516 /* The default relocation entry size is that of traditional V7 Unix. */
517 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
518
0ef5a5bd 519 /* The default symbol entry size is that of traditional Unix. */
252b5132
RH		 520 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
521
522#ifdef USE_MMAP
523 bfd_init_window (&obj_aout_sym_window (abfd));
524 bfd_init_window (&obj_aout_string_window (abfd));
525#endif
526 obj_aout_external_syms (abfd) = NULL;
527 obj_aout_external_strings (abfd) = NULL;
528 obj_aout_sym_hashes (abfd) = NULL;
529
530 if (! NAME(aout,make_sections) (abfd))
531 return NULL;
532
533 obj_datasec (abfd)->_raw_size = execp->a_data;
534 obj_bsssec (abfd)->_raw_size = execp->a_bss;
535
536 obj_textsec (abfd)->flags =
537 (execp->a_trsize != 0
538 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
539 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
540 obj_datasec (abfd)->flags =
541 (execp->a_drsize != 0
542 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
543 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
544 obj_bsssec (abfd)->flags = SEC_ALLOC;
545
546#ifdef THIS_IS_ONLY_DOCUMENTATION
547 /* The common code can't fill in these things because they depend
548 on either the start address of the text segment, the rounding
549 up of virtual addresses between segments, or the starting file
550 position of the text segment -- all of which varies among different
551 versions of a.out. */
552
553 /* Call back to the format-dependent code to fill in the rest of the
554 fields and do any further cleanup. Things that should be filled
555 in by the callback: */
556
557 struct exec *execp = exec_hdr (abfd);
558
559 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
560 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
561 /* data and bss are already filled in since they're so standard */
562
563 /* The virtual memory addresses of the sections */
564 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
565 obj_datasec (abfd)->vma = N_DATADDR(*execp);
566 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
567
568 /* The file offsets of the sections */
569 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
570 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
571
572 /* The file offsets of the relocation info */
573 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
574 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
575
576 /* The file offsets of the string table and symbol table. */
577 obj_str_filepos (abfd) = N_STROFF (*execp);
578 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
579
580 /* Determine the architecture and machine type of the object file. */
581 switch (N_MACHTYPE (*exec_hdr (abfd))) {
582 default:
583 abfd->obj_arch = bfd_arch_obscure;
584 break;
585 }
586
587 adata(abfd)->page_size = TARGET_PAGE_SIZE;
588 adata(abfd)->segment_size = SEGMENT_SIZE;
589 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
590
591 return abfd->xvec;
592
593 /* The architecture is encoded in various ways in various a.out variants,
594 or is not encoded at all in some of them. The relocation size depends
595 on the architecture and the a.out variant. Finally, the return value
596 is the bfd_target vector in use. If an error occurs, return zero and
597 set bfd_error to the appropriate error code.
598
599 Formats such as b.out, which have additional fields in the a.out
600 header, should cope with them in this callback as well. */
601#endif /* DOCUMENTATION */
602
beb0d161 603 result = (*callback_to_real_object_p) (abfd);
252b5132
RH		 604
605 /* Now that the segment addresses have been worked out, take a better
606 guess at whether the file is executable. If the entry point
607 is within the text segment, assume it is. (This makes files
608 executable even if their entry point address is 0, as long as
609 their text starts at zero.).
610
611 This test had to be changed to deal with systems where the text segment
612 runs at a different location than the default. The problem is that the
613 entry address can appear to be outside the text segment, thus causing an
614 erroneous conclusion that the file isn't executable.
615
616 To fix this, we now accept any non-zero entry point as an indication of
617 executability. This will work most of the time, since only the linker
0ef5a5bd 618 sets the entry point, and that is likely to be non-zero for most systems. */
252b5132
RH		 619
620 if (execp->a_entry != 0
621 || (execp->a_entry >= obj_textsec(abfd)->vma
622 && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
623 abfd->flags |= EXEC_P;
624#ifdef STAT_FOR_EXEC
625 else
626 {
627 struct stat stat_buf;
628
629 /* The original heuristic doesn't work in some important cases.
630 The a.out file has no information about the text start
631 address. For files (like kernels) linked to non-standard
632 addresses (ld -Ttext nnn) the entry point may not be between
633 the default text start (obj_textsec(abfd)->vma) and
634 (obj_textsec(abfd)->vma) + text size. This is not just a mach
635 issue. Many kernels are loaded at non standard addresses. */
636 if (abfd->iostream != NULL
637 && (abfd->flags & BFD_IN_MEMORY) == 0
638 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
639 && ((stat_buf.st_mode & 0111) != 0))
640 abfd->flags |= EXEC_P;
641 }
642#endif /* STAT_FOR_EXEC */
643
644 if (result)
645 {
646#if 0 /* These should be set correctly anyways. */
647 abfd->sections = obj_textsec (abfd);
648 obj_textsec (abfd)->next = obj_datasec (abfd);
649 obj_datasec (abfd)->next = obj_bsssec (abfd);
650#endif
651 }
652 else
653 {
654 free (rawptr);
655 abfd->tdata.aout_data = oldrawptr;
656 }
657 return result;
658}
659
660/*
661FUNCTION
662 aout_@var{size}_mkobject
663
664SYNOPSIS
665 boolean aout_@var{size}_mkobject, (bfd *abfd);
666
667DESCRIPTION
668 Initialize BFD @var{abfd} for use with a.out files.
669*/
670
671boolean
672NAME(aout,mkobject) (abfd)
673 bfd *abfd;
674{
675 struct aout_data_struct *rawptr;
676
677 bfd_set_error (bfd_error_system_call);
678
679 /* Use an intermediate variable for clarity */
680 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
681
682 if (rawptr == NULL)
683 return false;
684
685 abfd->tdata.aout_data = rawptr;
686 exec_hdr (abfd) = &(rawptr->e);
687
688 obj_textsec (abfd) = (asection *)NULL;
689 obj_datasec (abfd) = (asection *)NULL;
690 obj_bsssec (abfd) = (asection *)NULL;
691
692 return true;
693}
694
252b5132
RH		 695/*
696FUNCTION
697 aout_@var{size}_machine_type
698
699SYNOPSIS
700 enum machine_type aout_@var{size}_machine_type
701 (enum bfd_architecture arch,
702 unsigned long machine));
703
704DESCRIPTION
705 Keep track of machine architecture and machine type for
706 a.out's. Return the <<machine_type>> for a particular
707 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
708 and machine can't be represented in a.out format.
709
710 If the architecture is understood, machine type 0 (default)
711 is always understood.
712*/
713
714enum machine_type
715NAME(aout,machine_type) (arch, machine, unknown)
716 enum bfd_architecture arch;
717 unsigned long machine;
718 boolean *unknown;
719{
720 enum machine_type arch_flags;
721
722 arch_flags = M_UNKNOWN;
723 *unknown = true;
724
725 switch (arch) {
726 case bfd_arch_sparc:
727 if (machine == 0
728 || machine == bfd_mach_sparc
729 || machine == bfd_mach_sparc_sparclite
730 || machine == bfd_mach_sparc_sparclite_le
731 || machine == bfd_mach_sparc_v9)
732 arch_flags = M_SPARC;
733 else if (machine == bfd_mach_sparc_sparclet)
734 arch_flags = M_SPARCLET;
735 break;
736
737 case bfd_arch_m68k:
738 switch (machine) {
739 case 0: arch_flags = M_68010; break;
740 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break;
741 case bfd_mach_m68010: arch_flags = M_68010; break;
742 case bfd_mach_m68020: arch_flags = M_68020; break;
743 default: arch_flags = M_UNKNOWN; break;
744 }
745 break;
746
747 case bfd_arch_i386:
748 if (machine == 0) arch_flags = M_386;
749 break;
750
751 case bfd_arch_a29k:
752 if (machine == 0) arch_flags = M_29K;
753 break;
754
755 case bfd_arch_arm:
756 if (machine == 0) arch_flags = M_ARM;
757 break;
0ef5a5bd 758
252b5132
RH		 759 case bfd_arch_mips:
760 switch (machine) {
761 case 0:
762 case bfd_mach_mips3000:
763 case bfd_mach_mips3900:
764 arch_flags = M_MIPS1;
765 break;
766 case bfd_mach_mips6000:
767 arch_flags = M_MIPS2;
768 break;
769 case bfd_mach_mips4000:
770 case bfd_mach_mips4010:
771 case bfd_mach_mips4100:
772 case bfd_mach_mips4300:
773 case bfd_mach_mips4400:
774 case bfd_mach_mips4600:
775 case bfd_mach_mips4650:
776 case bfd_mach_mips8000:
777 case bfd_mach_mips10000:
778 case bfd_mach_mips16:
e7af610e
NC		 779 case bfd_mach_mips32:
780 case bfd_mach_mips32_4k:
84ea6cf2
NC		 781 case bfd_mach_mips5:
782 case bfd_mach_mips64:
e7af610e 783 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
252b5132
RH		 784 arch_flags = M_MIPS2;
785 break;
786 default:
787 arch_flags = M_UNKNOWN;
788 break;
789 }
790 break;
791
792 case bfd_arch_ns32k:
793 switch (machine) {
794 case 0: arch_flags = M_NS32532; break;
795 case 32032: arch_flags = M_NS32032; break;
796 case 32532: arch_flags = M_NS32532; break;
797 default: arch_flags = M_UNKNOWN; break;
798 }
799 break;
800
801 case bfd_arch_vax:
802 *unknown = false;
803 break;
804
06c15ad7
HPN		 805 case bfd_arch_cris:
806 if (machine == 0 || machine == 255) arch_flags = M_CRIS;
807 break;
808
252b5132
RH		 809 default:
810 arch_flags = M_UNKNOWN;
811 }
812
813 if (arch_flags != M_UNKNOWN)
814 *unknown = false;
815
816 return arch_flags;
817}
818
252b5132
RH		 819/*
820FUNCTION
821 aout_@var{size}_set_arch_mach
822
823SYNOPSIS
824 boolean aout_@var{size}_set_arch_mach,
825 (bfd *,
826 enum bfd_architecture arch,
827 unsigned long machine));
828
829DESCRIPTION
830 Set the architecture and the machine of the BFD @var{abfd} to the
831 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
832 can support the architecture required.
833*/
834
835boolean
836NAME(aout,set_arch_mach) (abfd, arch, machine)
837 bfd *abfd;
838 enum bfd_architecture arch;
839 unsigned long machine;
840{
841 if (! bfd_default_set_arch_mach (abfd, arch, machine))
842 return false;
843
844 if (arch != bfd_arch_unknown)
845 {
846 boolean unknown;
847
848 NAME(aout,machine_type) (arch, machine, &unknown);
849 if (unknown)
850 return false;
851 }
852
853 /* Determine the size of a relocation entry */
854 switch (arch) {
855 case bfd_arch_sparc:
856 case bfd_arch_a29k:
857 case bfd_arch_mips:
858 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
859 break;
860 default:
861 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
862 break;
863 }
864
865 return (*aout_backend_info(abfd)->set_sizes) (abfd);
866}
867
868static void
869adjust_o_magic (abfd, execp)
870 bfd *abfd;
871 struct internal_exec *execp;
872{
873 file_ptr pos = adata (abfd).exec_bytes_size;
874 bfd_vma vma = 0;
875 int pad = 0;
876
877 /* Text. */
878 obj_textsec(abfd)->filepos = pos;
879 if (!obj_textsec(abfd)->user_set_vma)
880 obj_textsec(abfd)->vma = vma;
881 else
882 vma = obj_textsec(abfd)->vma;
883
884 pos += obj_textsec(abfd)->_raw_size;
885 vma += obj_textsec(abfd)->_raw_size;
886
887 /* Data. */
888 if (!obj_datasec(abfd)->user_set_vma)
889 {
890#if 0 /* ?? Does alignment in the file image really matter? */
891 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
892#endif
893 obj_textsec(abfd)->_raw_size += pad;
894 pos += pad;
895 vma += pad;
896 obj_datasec(abfd)->vma = vma;
897 }
898 else
899 vma = obj_datasec(abfd)->vma;
900 obj_datasec(abfd)->filepos = pos;
901 pos += obj_datasec(abfd)->_raw_size;
902 vma += obj_datasec(abfd)->_raw_size;
903
904 /* BSS. */
905 if (!obj_bsssec(abfd)->user_set_vma)
906 {
907#if 0
908 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
909#endif
910 obj_datasec(abfd)->_raw_size += pad;
911 pos += pad;
912 vma += pad;
913 obj_bsssec(abfd)->vma = vma;
914 }
915 else
916 {
917 /* The VMA of the .bss section is set by the the VMA of the
918 .data section plus the size of the .data section. We may
919 need to add padding bytes to make this true. */
920 pad = obj_bsssec (abfd)->vma - vma;
921 if (pad > 0)
922 {
923 obj_datasec (abfd)->_raw_size += pad;
924 pos += pad;
925 }
926 }
927 obj_bsssec(abfd)->filepos = pos;
928
929 /* Fix up the exec header. */
930 execp->a_text = obj_textsec(abfd)->_raw_size;
931 execp->a_data = obj_datasec(abfd)->_raw_size;
932 execp->a_bss = obj_bsssec(abfd)->_raw_size;
933 N_SET_MAGIC (*execp, OMAGIC);
934}
935
936static void
937adjust_z_magic (abfd, execp)
938 bfd *abfd;
939 struct internal_exec *execp;
940{
941 bfd_size_type data_pad, text_pad;
942 file_ptr text_end;
943 CONST struct aout_backend_data *abdp;
944 int ztih; /* Nonzero if text includes exec header. */
0ef5a5bd 945
252b5132
RH		 946 abdp = aout_backend_info (abfd);
947
948 /* Text. */
949 ztih = (abdp != NULL
950 && (abdp->text_includes_header
951 || obj_aout_subformat (abfd) == q_magic_format));
952 obj_textsec(abfd)->filepos = (ztih
953 ? adata(abfd).exec_bytes_size
954 : adata(abfd).zmagic_disk_block_size);
955 if (! obj_textsec(abfd)->user_set_vma)
956 {
957 /* ?? Do we really need to check for relocs here? */
958 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
959 ? 0
960 : (ztih
961 ? (abdp->default_text_vma
962 + adata(abfd).exec_bytes_size)
963 : abdp->default_text_vma));
964 text_pad = 0;
965 }
966 else
967 {
968 /* The .text section is being loaded at an unusual address. We
969 may need to pad it such that the .data section starts at a page
970 boundary. */
971 if (ztih)
972 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
973 & (adata (abfd).page_size - 1));
974 else
975 text_pad = ((- obj_textsec (abfd)->vma)
976 & (adata (abfd).page_size - 1));
977 }
978
979 /* Find start of data. */
980 if (ztih)
981 {
982 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
983 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
984 }
985 else
986 {
987 /* Note that if page_size == zmagic_disk_block_size, then
988 filepos == page_size, and this case is the same as the ztih
989 case. */
990 text_end = obj_textsec (abfd)->_raw_size;
991 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
992 text_end += obj_textsec (abfd)->filepos;
993 }
994 obj_textsec(abfd)->_raw_size += text_pad;
995 text_end += text_pad;
996
997 /* Data. */
998 if (!obj_datasec(abfd)->user_set_vma)
999 {
1000 bfd_vma vma;
1001 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
1002 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1003 }
1004 if (abdp && abdp->zmagic_mapped_contiguous)
1005 {
1006 text_pad = (obj_datasec(abfd)->vma
1007 - obj_textsec(abfd)->vma
1008 - obj_textsec(abfd)->_raw_size);
1009 obj_textsec(abfd)->_raw_size += text_pad;
1010 }
1011 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
1012 + obj_textsec(abfd)->_raw_size);
0ef5a5bd 1013
252b5132
RH		 1014 /* Fix up exec header while we're at it. */
1015 execp->a_text = obj_textsec(abfd)->_raw_size;
1016 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1017 execp->a_text += adata(abfd).exec_bytes_size;
1018 if (obj_aout_subformat (abfd) == q_magic_format)
1019 N_SET_MAGIC (*execp, QMAGIC);
1020 else
1021 N_SET_MAGIC (*execp, ZMAGIC);
1022
1023 /* Spec says data section should be rounded up to page boundary. */
1024 obj_datasec(abfd)->_raw_size
1025 = align_power (obj_datasec(abfd)->_raw_size,
1026 obj_bsssec(abfd)->alignment_power);
1027 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
1028 adata(abfd).page_size);
1029 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
1030
1031 /* BSS. */
1032 if (!obj_bsssec(abfd)->user_set_vma)
1033 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
1034 + obj_datasec(abfd)->_raw_size);
1035 /* If the BSS immediately follows the data section and extra space
1036 in the page is left after the data section, fudge data
1037 in the header so that the bss section looks smaller by that
1038 amount. We'll start the bss section there, and lie to the OS.
1039 (Note that a linker script, as well as the above assignment,
1040 could have explicitly set the BSS vma to immediately follow
1041 the data section.) */
1042 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
1043 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
1044 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
1045 obj_bsssec(abfd)->_raw_size - data_pad;
1046 else
1047 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1048}
1049
1050static void
1051adjust_n_magic (abfd, execp)
1052 bfd *abfd;
1053 struct internal_exec *execp;
1054{
1055 file_ptr pos = adata(abfd).exec_bytes_size;
1056 bfd_vma vma = 0;
1057 int pad;
0ef5a5bd 1058
252b5132
RH		 1059 /* Text. */
1060 obj_textsec(abfd)->filepos = pos;
1061 if (!obj_textsec(abfd)->user_set_vma)
1062 obj_textsec(abfd)->vma = vma;
1063 else
1064 vma = obj_textsec(abfd)->vma;
1065 pos += obj_textsec(abfd)->_raw_size;
1066 vma += obj_textsec(abfd)->_raw_size;
1067
1068 /* Data. */
1069 obj_datasec(abfd)->filepos = pos;
1070 if (!obj_datasec(abfd)->user_set_vma)
1071 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1072 vma = obj_datasec(abfd)->vma;
0ef5a5bd 1073
252b5132
RH		 1074 /* Since BSS follows data immediately, see if it needs alignment. */
1075 vma += obj_datasec(abfd)->_raw_size;
1076 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1077 obj_datasec(abfd)->_raw_size += pad;
1078 pos += obj_datasec(abfd)->_raw_size;
1079
1080 /* BSS. */
1081 if (!obj_bsssec(abfd)->user_set_vma)
1082 obj_bsssec(abfd)->vma = vma;
1083 else
1084 vma = obj_bsssec(abfd)->vma;
1085
1086 /* Fix up exec header. */
1087 execp->a_text = obj_textsec(abfd)->_raw_size;
1088 execp->a_data = obj_datasec(abfd)->_raw_size;
1089 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1090 N_SET_MAGIC (*execp, NMAGIC);
1091}
1092
1093boolean
1094NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1095 bfd *abfd;
1096 bfd_size_type *text_size;
7442e600 1097 file_ptr *text_end ATTRIBUTE_UNUSED;
252b5132
RH		 1098{
1099 struct internal_exec *execp = exec_hdr (abfd);
1100
1101 if (! NAME(aout,make_sections) (abfd))
1102 return false;
1103
1104 if (adata(abfd).magic != undecided_magic)
1105 return true;
1106
1107 obj_textsec(abfd)->_raw_size =
1108 align_power(obj_textsec(abfd)->_raw_size,
1109 obj_textsec(abfd)->alignment_power);
1110
1111 *text_size = obj_textsec (abfd)->_raw_size;
1112 /* Rule (heuristic) for when to pad to a new page. Note that there
1113 are (at least) two ways demand-paged (ZMAGIC) files have been
1114 handled. Most Berkeley-based systems start the text segment at
1115 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1116 segment right after the exec header; the latter is counted in the
1117 text segment size, and is paged in by the kernel with the rest of
0ef5a5bd 1118 the text. */
252b5132
RH		 1119
1120 /* This perhaps isn't the right way to do this, but made it simpler for me
1121 to understand enough to implement it. Better would probably be to go
1122 right from BFD flags to alignment/positioning characteristics. But the
1123 old code was sloppy enough about handling the flags, and had enough
1124 other magic, that it was a little hard for me to understand. I think
1125 I understand it better now, but I haven't time to do the cleanup this
1126 minute. */
1127
1128 if (abfd->flags & D_PAGED)
1129 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1130 adata(abfd).magic = z_magic;
1131 else if (abfd->flags & WP_TEXT)
1132 adata(abfd).magic = n_magic;
1133 else
1134 adata(abfd).magic = o_magic;
1135
1136#ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1137#if __GNUC__ >= 2
1138 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1139 ({ char *str;
1140 switch (adata(abfd).magic) {
1141 case n_magic: str = "NMAGIC"; break;
1142 case o_magic: str = "OMAGIC"; break;
1143 case z_magic: str = "ZMAGIC"; break;
1144 default: abort ();
1145 }
1146 str;
1147 }),
1148 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1149 obj_textsec(abfd)->alignment_power,
1150 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1151 obj_datasec(abfd)->alignment_power,
1152 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1153 obj_bsssec(abfd)->alignment_power);
1154#endif
1155#endif
1156
1157 switch (adata(abfd).magic)
1158 {
1159 case o_magic:
1160 adjust_o_magic (abfd, execp);
1161 break;
1162 case z_magic:
1163 adjust_z_magic (abfd, execp);
1164 break;
1165 case n_magic:
1166 adjust_n_magic (abfd, execp);
1167 break;
1168 default:
1169 abort ();
1170 }
1171
1172#ifdef BFD_AOUT_DEBUG
1173 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1174 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1175 obj_textsec(abfd)->filepos,
1176 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1177 obj_datasec(abfd)->filepos,
1178 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1179#endif
1180
1181 return true;
1182}
1183
1184/*
1185FUNCTION
1186 aout_@var{size}_new_section_hook
1187
1188SYNOPSIS
1189 boolean aout_@var{size}_new_section_hook,
1190 (bfd *abfd,
1191 asection *newsect));
1192
1193DESCRIPTION
1194 Called by the BFD in response to a @code{bfd_make_section}
1195 request.
1196*/
1197boolean
1198NAME(aout,new_section_hook) (abfd, newsect)
1199 bfd *abfd;
1200 asection *newsect;
1201{
1202 /* align to double at least */
1203 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1204
252b5132
RH		 1205 if (bfd_get_format (abfd) == bfd_object)
1206 {
1207 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1208 obj_textsec(abfd)= newsect;
1209 newsect->target_index = N_TEXT;
1210 return true;
1211 }
1212
1213 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1214 obj_datasec(abfd) = newsect;
1215 newsect->target_index = N_DATA;
1216 return true;
1217 }
1218
1219 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1220 obj_bsssec(abfd) = newsect;
1221 newsect->target_index = N_BSS;
1222 return true;
1223 }
1224
1225 }
1226
1227 /* We allow more than three sections internally */
1228 return true;
1229}
1230
1231boolean
1232NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1233 bfd *abfd;
1234 sec_ptr section;
1235 PTR location;
1236 file_ptr offset;
1237 bfd_size_type count;
1238{
1239 file_ptr text_end;
1240 bfd_size_type text_size;
1241
1242 if (! abfd->output_has_begun)
1243 {
1244 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1245 return false;
1246 }
1247
1248 if (section == obj_bsssec (abfd))
1249 {
1250 bfd_set_error (bfd_error_no_contents);
1251 return false;
1252 }
1253
1254 if (section != obj_textsec (abfd)
1255 && section != obj_datasec (abfd))
1256 {
1257 (*_bfd_error_handler)
1258 (_("%s: can not represent section `%s' in a.out object file format"),
1259 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1260 bfd_set_error (bfd_error_nonrepresentable_section);
1261 return false;
1262 }
1263
1264 if (count != 0)
1265 {
1266 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1267 || bfd_write (location, 1, count, abfd) != count)
1268 return false;
1269 }
1270
1271 return true;
1272}
1273\f
1274/* Read the external symbols from an a.out file. */
1275
1276static boolean
1277aout_get_external_symbols (abfd)
1278 bfd *abfd;
1279{
1280 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1281 {
1282 bfd_size_type count;
1283 struct external_nlist *syms;
1284
1285 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1286
1287#ifdef USE_MMAP
1288 if (bfd_get_file_window (abfd,
1289 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1290 &obj_aout_sym_window (abfd), true) == false)
1291 return false;
1292 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1293#else
1294 /* We allocate using malloc to make the values easy to free
1295 later on. If we put them on the objalloc it might not be
1296 possible to free them. */
1297 syms = ((struct external_nlist *)
1298 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1299 if (syms == (struct external_nlist *) NULL && count != 0)
1300 return false;
1301
1302 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1303 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1304 != exec_hdr (abfd)->a_syms))
1305 {
1306 free (syms);
1307 return false;
1308 }
1309#endif
1310
1311 obj_aout_external_syms (abfd) = syms;
1312 obj_aout_external_sym_count (abfd) = count;
1313 }
0ef5a5bd 1314
252b5132
RH		 1315 if (obj_aout_external_strings (abfd) == NULL
1316 && exec_hdr (abfd)->a_syms != 0)
1317 {
1318 unsigned char string_chars[BYTES_IN_WORD];
1319 bfd_size_type stringsize;
1320 char *strings;
1321
1322 /* Get the size of the strings. */
1323 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1324 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1325 != BYTES_IN_WORD))
1326 return false;
1327 stringsize = GET_WORD (abfd, string_chars);
1328
1329#ifdef USE_MMAP
1330 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1331 &obj_aout_string_window (abfd), true) == false)
1332 return false;
1333 strings = (char *) obj_aout_string_window (abfd).data;
1334#else
1335 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1336 if (strings == NULL)
1337 return false;
1338
1339 /* Skip space for the string count in the buffer for convenience
1340 when using indexes. */
1341 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1342 abfd)
1343 != stringsize - BYTES_IN_WORD)
1344 {
1345 free (strings);
1346 return false;
1347 }
1348#endif
1349
1350 /* Ensure that a zero index yields an empty string. */
1351 strings[0] = '\0';
1352
1353 strings[stringsize - 1] = 0;
1354
1355 obj_aout_external_strings (abfd) = strings;
1356 obj_aout_external_string_size (abfd) = stringsize;
1357 }
1358
1359 return true;
1360}
1361
1362/* Translate an a.out symbol into a BFD symbol. The desc, other, type
1363 and symbol->value fields of CACHE_PTR will be set from the a.out
1364 nlist structure. This function is responsible for setting
1365 symbol->flags and symbol->section, and adjusting symbol->value. */
1366
1367static boolean
1368translate_from_native_sym_flags (abfd, cache_ptr)
1369 bfd *abfd;
1370 aout_symbol_type *cache_ptr;
1371{
1372 flagword visible;
1373
1374 if ((cache_ptr->type & N_STAB) != 0
1375 || cache_ptr->type == N_FN)
1376 {
1377 asection *sec;
1378
1379 /* This is a debugging symbol. */
1380
1381 cache_ptr->symbol.flags = BSF_DEBUGGING;
1382
1383 /* Work out the symbol section. */
1384 switch (cache_ptr->type & N_TYPE)
1385 {
1386 case N_TEXT:
1387 case N_FN:
1388 sec = obj_textsec (abfd);
1389 break;
1390 case N_DATA:
1391 sec = obj_datasec (abfd);
1392 break;
1393 case N_BSS:
1394 sec = obj_bsssec (abfd);
1395 break;
1396 default:
1397 case N_ABS:
1398 sec = bfd_abs_section_ptr;
1399 break;
1400 }
1401
1402 cache_ptr->symbol.section = sec;
1403 cache_ptr->symbol.value -= sec->vma;
1404
1405 return true;
1406 }
1407
1408 /* Get the default visibility. This does not apply to all types, so
1409 we just hold it in a local variable to use if wanted. */
1410 if ((cache_ptr->type & N_EXT) == 0)
1411 visible = BSF_LOCAL;
1412 else
1413 visible = BSF_GLOBAL;
1414
1415 switch (cache_ptr->type)
1416 {
1417 default:
1418 case N_ABS: case N_ABS | N_EXT:
1419 cache_ptr->symbol.section = bfd_abs_section_ptr;
1420 cache_ptr->symbol.flags = visible;
1421 break;
1422
1423 case N_UNDF | N_EXT:
1424 if (cache_ptr->symbol.value != 0)
1425 {
1426 /* This is a common symbol. */
1427 cache_ptr->symbol.flags = BSF_GLOBAL;
1428 cache_ptr->symbol.section = bfd_com_section_ptr;
1429 }
1430 else
1431 {
1432 cache_ptr->symbol.flags = 0;
1433 cache_ptr->symbol.section = bfd_und_section_ptr;
1434 }
1435 break;
1436
1437 case N_TEXT: case N_TEXT | N_EXT:
1438 cache_ptr->symbol.section = obj_textsec (abfd);
1439 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1440 cache_ptr->symbol.flags = visible;
1441 break;
1442
1443 /* N_SETV symbols used to represent set vectors placed in the
1444 data section. They are no longer generated. Theoretically,
1445 it was possible to extract the entries and combine them with
1446 new ones, although I don't know if that was ever actually
1447 done. Unless that feature is restored, treat them as data
1448 symbols. */
1449 case N_SETV: case N_SETV | N_EXT:
1450 case N_DATA: case N_DATA | N_EXT:
1451 cache_ptr->symbol.section = obj_datasec (abfd);
1452 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1453 cache_ptr->symbol.flags = visible;
1454 break;
1455
1456 case N_BSS: case N_BSS | N_EXT:
1457 cache_ptr->symbol.section = obj_bsssec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1460 break;
1461
1462 case N_SETA: case N_SETA | N_EXT:
1463 case N_SETT: case N_SETT | N_EXT:
1464 case N_SETD: case N_SETD | N_EXT:
1465 case N_SETB: case N_SETB | N_EXT:
1466 {
1467 /* This code is no longer needed. It used to be used to make
1468 the linker handle set symbols, but they are now handled in
1469 the add_symbols routine instead. */
1470#if 0
1471 asection *section;
1472 arelent_chain *reloc;
1473 asection *into_section;
1474
1475 /* This is a set symbol. The name of the symbol is the name
1476 of the set (e.g., __CTOR_LIST__). The value of the symbol
1477 is the value to add to the set. We create a section with
1478 the same name as the symbol, and add a reloc to insert the
1479 appropriate value into the section.
1480
1481 This action is actually obsolete; it used to make the
1482 linker do the right thing, but the linker no longer uses
1483 this function. */
1484
1485 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1486 if (section == NULL)
1487 {
1488 char *copy;
1489
1490 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1491 if (copy == NULL)
1492 return false;
1493
1494 strcpy (copy, cache_ptr->symbol.name);
1495 section = bfd_make_section (abfd, copy);
1496 if (section == NULL)
1497 return false;
1498 }
1499
1500 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1501 if (reloc == NULL)
1502 return false;
1503
1504 /* Build a relocation entry for the constructor. */
1505 switch (cache_ptr->type & N_TYPE)
1506 {
1507 case N_SETA:
1508 into_section = bfd_abs_section_ptr;
1509 cache_ptr->type = N_ABS;
1510 break;
1511 case N_SETT:
1512 into_section = obj_textsec (abfd);
1513 cache_ptr->type = N_TEXT;
1514 break;
1515 case N_SETD:
1516 into_section = obj_datasec (abfd);
1517 cache_ptr->type = N_DATA;
1518 break;
1519 case N_SETB:
1520 into_section = obj_bsssec (abfd);
1521 cache_ptr->type = N_BSS;
1522 break;
1523 }
1524
1525 /* Build a relocation pointing into the constructor section
1526 pointing at the symbol in the set vector specified. */
1527 reloc->relent.addend = cache_ptr->symbol.value;
1528 cache_ptr->symbol.section = into_section;
1529 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1530
1531 /* We modify the symbol to belong to a section depending upon
1532 the name of the symbol, and add to the size of the section
1533 to contain a pointer to the symbol. Build a reloc entry to
1534 relocate to this symbol attached to this section. */
1535 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1536
1537 section->reloc_count++;
1538 section->alignment_power = 2;
1539
1540 reloc->next = section->constructor_chain;
1541 section->constructor_chain = reloc;
1542 reloc->relent.address = section->_raw_size;
1543 section->_raw_size += BYTES_IN_WORD;
1544
1545 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1546
1547#endif /* 0 */
1548
1549 switch (cache_ptr->type & N_TYPE)
1550 {
1551 case N_SETA:
1552 cache_ptr->symbol.section = bfd_abs_section_ptr;
1553 break;
1554 case N_SETT:
1555 cache_ptr->symbol.section = obj_textsec (abfd);
1556 break;
1557 case N_SETD:
1558 cache_ptr->symbol.section = obj_datasec (abfd);
1559 break;
1560 case N_SETB:
1561 cache_ptr->symbol.section = obj_bsssec (abfd);
1562 break;
1563 }
1564
1565 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1566 }
1567 break;
1568
1569 case N_WARNING:
1570 /* This symbol is the text of a warning message. The next
1571 symbol is the symbol to associate the warning with. If a
1572 reference is made to that symbol, a warning is issued. */
1573 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1574 cache_ptr->symbol.section = bfd_abs_section_ptr;
1575 break;
1576
1577 case N_INDR: case N_INDR | N_EXT:
1578 /* An indirect symbol. This consists of two symbols in a row.
1579 The first symbol is the name of the indirection. The second
1580 symbol is the name of the target. A reference to the first
1581 symbol becomes a reference to the second. */
1582 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1583 cache_ptr->symbol.section = bfd_ind_section_ptr;
1584 break;
1585
1586 case N_WEAKU:
1587 cache_ptr->symbol.section = bfd_und_section_ptr;
1588 cache_ptr->symbol.flags = BSF_WEAK;
1589 break;
1590
1591 case N_WEAKA:
1592 cache_ptr->symbol.section = bfd_abs_section_ptr;
1593 cache_ptr->symbol.flags = BSF_WEAK;
1594 break;
1595
1596 case N_WEAKT:
1597 cache_ptr->symbol.section = obj_textsec (abfd);
1598 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1599 cache_ptr->symbol.flags = BSF_WEAK;
1600 break;
1601
1602 case N_WEAKD:
1603 cache_ptr->symbol.section = obj_datasec (abfd);
1604 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1605 cache_ptr->symbol.flags = BSF_WEAK;
1606 break;
1607
1608 case N_WEAKB:
1609 cache_ptr->symbol.section = obj_bsssec (abfd);
1610 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1611 cache_ptr->symbol.flags = BSF_WEAK;
1612 break;
1613 }
1614
1615 return true;
1616}
1617
1618/* Set the fields of SYM_POINTER according to CACHE_PTR. */
1619
1620static boolean
1621translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1622 bfd *abfd;
1623 asymbol *cache_ptr;
1624 struct external_nlist *sym_pointer;
1625{
1626 bfd_vma value = cache_ptr->value;
1627 asection *sec;
1628 bfd_vma off;
1629
1630 /* Mask out any existing type bits in case copying from one section
1631 to another. */
1632 sym_pointer->e_type[0] &= ~N_TYPE;
1633
1634 sec = bfd_get_section (cache_ptr);
1635 off = 0;
1636
1637 if (sec == NULL)
1638 {
1639 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1640 file. */
1641 (*_bfd_error_handler)
1642 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
0ef5a5bd 1643 bfd_get_filename (abfd),
252b5132
RH		 1644 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1645 bfd_set_error (bfd_error_nonrepresentable_section);
1646 return false;
1647 }
1648
1649 if (sec->output_section != NULL)
1650 {
1651 off = sec->output_offset;
1652 sec = sec->output_section;
1653 }
1654
1655 if (bfd_is_abs_section (sec))
1656 sym_pointer->e_type[0] |= N_ABS;
1657 else if (sec == obj_textsec (abfd))
1658 sym_pointer->e_type[0] |= N_TEXT;
1659 else if (sec == obj_datasec (abfd))
1660 sym_pointer->e_type[0] |= N_DATA;
1661 else if (sec == obj_bsssec (abfd))
1662 sym_pointer->e_type[0] |= N_BSS;
1663 else if (bfd_is_und_section (sec))
1664 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1665 else if (bfd_is_ind_section (sec))
1666 sym_pointer->e_type[0] = N_INDR;
1667 else if (bfd_is_com_section (sec))
1668 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1669 else
1670 {
1671 (*_bfd_error_handler)
1672 (_("%s: can not represent section `%s' in a.out object file format"),
1673 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1674 bfd_set_error (bfd_error_nonrepresentable_section);
1675 return false;
1676 }
1677
1678 /* Turn the symbol from section relative to absolute again */
1679 value += sec->vma + off;
1680
1681 if ((cache_ptr->flags & BSF_WARNING) != 0)
1682 sym_pointer->e_type[0] = N_WARNING;
1683
1684 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1685 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1686 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1687 sym_pointer->e_type[0] |= N_EXT;
930d924d
L		 1688 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1689 sym_pointer->e_type[0] &= ~N_EXT;
252b5132
RH		 1690
1691 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1692 {
1693 int type = ((aout_symbol_type *) cache_ptr)->type;
1694 switch (type)
1695 {
1696 case N_ABS: type = N_SETA; break;
1697 case N_TEXT: type = N_SETT; break;
1698 case N_DATA: type = N_SETD; break;
1699 case N_BSS: type = N_SETB; break;
1700 }
1701 sym_pointer->e_type[0] = type;
1702 }
1703
1704 if ((cache_ptr->flags & BSF_WEAK) != 0)
1705 {
1706 int type;
1707
1708 switch (sym_pointer->e_type[0] & N_TYPE)
1709 {
1710 default:
1711 case N_ABS: type = N_WEAKA; break;
1712 case N_TEXT: type = N_WEAKT; break;
1713 case N_DATA: type = N_WEAKD; break;
1714 case N_BSS: type = N_WEAKB; break;
1715 case N_UNDF: type = N_WEAKU; break;
1716 }
1717 sym_pointer->e_type[0] = type;
1718 }
1719
1720 PUT_WORD(abfd, value, sym_pointer->e_value);
1721
1722 return true;
1723}
1724\f
0ef5a5bd 1725/* Native-level interface to symbols. */
252b5132
RH		 1726
1727asymbol *
1728NAME(aout,make_empty_symbol) (abfd)
1729 bfd *abfd;
1730{
1731 aout_symbol_type *new =
1732 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1733 if (!new)
1734 return NULL;
1735 new->symbol.the_bfd = abfd;
1736
1737 return &new->symbol;
1738}
1739
1740/* Translate a set of internal symbols into external symbols. */
1741
1742boolean
1743NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1744 bfd *abfd;
1745 aout_symbol_type *in;
1746 struct external_nlist *ext;
1747 bfd_size_type count;
1748 char *str;
1749 bfd_size_type strsize;
1750 boolean dynamic;
1751{
1752 struct external_nlist *ext_end;
1753
1754 ext_end = ext + count;
1755 for (; ext < ext_end; ext++, in++)
1756 {
1757 bfd_vma x;
1758
1759 x = GET_WORD (abfd, ext->e_strx);
1760 in->symbol.the_bfd = abfd;
1761
1762 /* For the normal symbols, the zero index points at the number
1763 of bytes in the string table but is to be interpreted as the
1764 null string. For the dynamic symbols, the number of bytes in
1765 the string table is stored in the __DYNAMIC structure and the
1766 zero index points at an actual string. */
1767 if (x == 0 && ! dynamic)
1768 in->symbol.name = "";
1769 else if (x < strsize)
1770 in->symbol.name = str + x;
1771 else
1772 return false;
1773
1774 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1775 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1776 in->other = bfd_h_get_8 (abfd, ext->e_other);
1777 in->type = bfd_h_get_8 (abfd, ext->e_type);
1778 in->symbol.udata.p = NULL;
1779
1780 if (! translate_from_native_sym_flags (abfd, in))
1781 return false;
1782
1783 if (dynamic)
1784 in->symbol.flags |= BSF_DYNAMIC;
1785 }
1786
1787 return true;
1788}
1789
1790/* We read the symbols into a buffer, which is discarded when this
1791 function exits. We read the strings into a buffer large enough to
0ef5a5bd 1792 hold them all plus all the cached symbol entries. */
252b5132
RH		 1793
1794boolean
1795NAME(aout,slurp_symbol_table) (abfd)
1796 bfd *abfd;
1797{
1798 struct external_nlist *old_external_syms;
1799 aout_symbol_type *cached;
1800 size_t cached_size;
1801
1802 /* If there's no work to be done, don't do any */
1803 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1804 return true;
1805
1806 old_external_syms = obj_aout_external_syms (abfd);
1807
1808 if (! aout_get_external_symbols (abfd))
1809 return false;
1810
1811 cached_size = (obj_aout_external_sym_count (abfd)
1812 * sizeof (aout_symbol_type));
1813 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1814 if (cached == NULL && cached_size != 0)
1815 return false;
1816 if (cached_size != 0)
1817 memset (cached, 0, cached_size);
1818
1819 /* Convert from external symbol information to internal. */
1820 if (! (NAME(aout,translate_symbol_table)
1821 (abfd, cached,
1822 obj_aout_external_syms (abfd),
1823 obj_aout_external_sym_count (abfd),
1824 obj_aout_external_strings (abfd),
1825 obj_aout_external_string_size (abfd),
1826 false)))
1827 {
1828 free (cached);
1829 return false;
1830 }
1831
1832 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1833
1834 obj_aout_symbols (abfd) = cached;
1835
1836 /* It is very likely that anybody who calls this function will not
1837 want the external symbol information, so if it was allocated
1838 because of our call to aout_get_external_symbols, we free it up
1839 right away to save space. */
1840 if (old_external_syms == (struct external_nlist *) NULL
1841 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1842 {
1843#ifdef USE_MMAP
1844 bfd_free_window (&obj_aout_sym_window (abfd));
1845#else
1846 free (obj_aout_external_syms (abfd));
1847#endif
1848 obj_aout_external_syms (abfd) = NULL;
1849 }
1850
1851 return true;
1852}
1853\f
1854/* We use a hash table when writing out symbols so that we only write
1855 out a particular string once. This helps particularly when the
1856 linker writes out stabs debugging entries, because each different
1857 contributing object file tends to have many duplicate stabs
1858 strings.
1859
1860 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1861 if BFD_TRADITIONAL_FORMAT is set. */
1862
1863static bfd_size_type add_to_stringtab
1864 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1865static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1866
1867/* Get the index of a string in a strtab, adding it if it is not
1868 already present. */
1869
1870static INLINE bfd_size_type
1871add_to_stringtab (abfd, tab, str, copy)
1872 bfd *abfd;
1873 struct bfd_strtab_hash *tab;
1874 const char *str;
1875 boolean copy;
1876{
1877 boolean hash;
1878 bfd_size_type index;
1879
1880 /* An index of 0 always means the empty string. */
1881 if (str == 0 || *str == '\0')
1882 return 0;
1883
1884 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1885 doesn't understand a hashed string table. */
1886 hash = true;
1887 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1888 hash = false;
1889
1890 index = _bfd_stringtab_add (tab, str, hash, copy);
1891
1892 if (index != (bfd_size_type) -1)
1893 {
1894 /* Add BYTES_IN_WORD to the return value to account for the
1895 space taken up by the string table size. */
1896 index += BYTES_IN_WORD;
1897 }
1898
1899 return index;
1900}
1901
1902/* Write out a strtab. ABFD is already at the right location in the
1903 file. */
1904
1905static boolean
1906emit_stringtab (abfd, tab)
1907 register bfd *abfd;
1908 struct bfd_strtab_hash *tab;
1909{
1910 bfd_byte buffer[BYTES_IN_WORD];
1911
1912 /* The string table starts with the size. */
1913 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1914 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1915 return false;
1916
1917 return _bfd_stringtab_emit (abfd, tab);
1918}
1919\f
1920boolean
1921NAME(aout,write_syms) (abfd)
1922 bfd *abfd;
1923{
1924 unsigned int count ;
1925 asymbol **generic = bfd_get_outsymbols (abfd);
1926 struct bfd_strtab_hash *strtab;
1927
1928 strtab = _bfd_stringtab_init ();
1929 if (strtab == NULL)
1930 return false;
1931
1932 for (count = 0; count < bfd_get_symcount (abfd); count++)
1933 {
1934 asymbol *g = generic[count];
1935 bfd_size_type indx;
1936 struct external_nlist nsp;
1937
1938 indx = add_to_stringtab (abfd, strtab, g->name, false);
1939 if (indx == (bfd_size_type) -1)
1940 goto error_return;
1941 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1942
1943 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1944 {
1945 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1946 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1947 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1948 }
1949 else
1950 {
1951 bfd_h_put_16(abfd,0, nsp.e_desc);
1952 bfd_h_put_8(abfd, 0, nsp.e_other);
1953 bfd_h_put_8(abfd, 0, nsp.e_type);
1954 }
1955
1956 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1957 goto error_return;
1958
1959 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1960 != EXTERNAL_NLIST_SIZE)
1961 goto error_return;
1962
1963 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1964 here, at the end. */
1965 g->KEEPIT = count;
1966 }
1967
1968 if (! emit_stringtab (abfd, strtab))
1969 goto error_return;
1970
1971 _bfd_stringtab_free (strtab);
1972
1973 return true;
1974
1975error_return:
1976 _bfd_stringtab_free (strtab);
1977 return false;
1978}
1979
1980\f
1981long
1982NAME(aout,get_symtab) (abfd, location)
1983 bfd *abfd;
1984 asymbol **location;
1985{
1986 unsigned int counter = 0;
1987 aout_symbol_type *symbase;
1988
beb0d161 1989 if (!NAME(aout,slurp_symbol_table) (abfd))
252b5132
RH		 1990 return -1;
1991
1992 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
beb0d161 1993 *(location++) = (asymbol *) ( symbase++);
252b5132
RH		 1994 *location++ =0;
1995 return bfd_get_symcount (abfd);
1996}
1997
1998\f
1999/* Standard reloc stuff */
0ef5a5bd 2000/* Output standard relocation information to a file in target byte order. */
252b5132
RH		 2001
2002extern void NAME(aout,swap_std_reloc_out)
2003 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2004
2005void
2006NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2007 bfd *abfd;
2008 arelent *g;
2009 struct reloc_std_external *natptr;
2010{
2011 int r_index;
2012 asymbol *sym = *(g->sym_ptr_ptr);
2013 int r_extern;
2014 unsigned int r_length;
2015 int r_pcrel;
2016 int r_baserel, r_jmptable, r_relative;
2017 asection *output_section = sym->section->output_section;
2018
2019 PUT_WORD(abfd, g->address, natptr->r_address);
2020
2021 r_length = g->howto->size ; /* Size as a power of two */
2022 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2023 /* XXX This relies on relocs coming from a.out files. */
2024 r_baserel = (g->howto->type & 8) != 0;
2025 r_jmptable = (g->howto->type & 16) != 0;
2026 r_relative = (g->howto->type & 32) != 0;
2027
2028#if 0
2029 /* For a standard reloc, the addend is in the object file. */
2030 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2031#endif
2032
2033 /* name was clobbered by aout_write_syms to be symbol index */
2034
2035 /* If this relocation is relative to a symbol then set the
2036 r_index to the symbols index, and the r_extern bit.
2037
2038 Absolute symbols can come in in two ways, either as an offset
2039 from the abs section, or as a symbol which has an abs value.
2040 check for that here
2041 */
2042
252b5132
RH		 2043 if (bfd_is_com_section (output_section)
2044 || bfd_is_abs_section (output_section)
2045 || bfd_is_und_section (output_section))
2046 {
2047 if (bfd_abs_section_ptr->symbol == sym)
2048 {
2049 /* Whoops, looked like an abs symbol, but is really an offset
2050 from the abs section */
2051 r_index = N_ABS;
2052 r_extern = 0;
2053 }
2054 else
2055 {
2056 /* Fill in symbol */
2057 r_extern = 1;
2058 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2059
2060 }
2061 }
2062 else
2063 {
2064 /* Just an ordinary section */
2065 r_extern = 0;
2066 r_index = output_section->target_index;
2067 }
2068
2069 /* now the fun stuff */
2070 if (bfd_header_big_endian (abfd)) {
2071 natptr->r_index[0] = r_index >> 16;
2072 natptr->r_index[1] = r_index >> 8;
2073 natptr->r_index[2] = r_index;
2074 natptr->r_type[0] =
2075 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
2076 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2077 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2078 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2079 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2080 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2081 } else {
2082 natptr->r_index[2] = r_index >> 16;
2083 natptr->r_index[1] = r_index >> 8;
2084 natptr->r_index[0] = r_index;
2085 natptr->r_type[0] =
2086 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2087 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2088 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2089 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2090 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2091 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2092 }
2093}
2094
252b5132 2095/* Extended stuff */
0ef5a5bd 2096/* Output extended relocation information to a file in target byte order. */
252b5132
RH		 2097
2098extern void NAME(aout,swap_ext_reloc_out)
2099 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2100
2101void
2102NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2103 bfd *abfd;
2104 arelent *g;
2105 register struct reloc_ext_external *natptr;
2106{
2107 int r_index;
2108 int r_extern;
2109 unsigned int r_type;
2110 unsigned int r_addend;
2111 asymbol *sym = *(g->sym_ptr_ptr);
2112 asection *output_section = sym->section->output_section;
2113
2114 PUT_WORD (abfd, g->address, natptr->r_address);
2115
2116 r_type = (unsigned int) g->howto->type;
2117
2118 r_addend = g->addend;
2119 if ((sym->flags & BSF_SECTION_SYM) != 0)
2120 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2121
2122 /* If this relocation is relative to a symbol then set the
2123 r_index to the symbols index, and the r_extern bit.
2124
2125 Absolute symbols can come in in two ways, either as an offset
2126 from the abs section, or as a symbol which has an abs value.
2127 check for that here. */
2128
2129 if (bfd_is_abs_section (bfd_get_section (sym)))
2130 {
2131 r_extern = 0;
2132 r_index = N_ABS;
2133 }
2134 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2135 {
2136 if (bfd_is_und_section (bfd_get_section (sym))
2137 || (sym->flags & BSF_GLOBAL) != 0)
2138 r_extern = 1;
2139 else
2140 r_extern = 0;
2141 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2142 }
2143 else
2144 {
2145 /* Just an ordinary section */
2146 r_extern = 0;
2147 r_index = output_section->target_index;
2148 }
2149
2150 /* now the fun stuff */
2151 if (bfd_header_big_endian (abfd)) {
2152 natptr->r_index[0] = r_index >> 16;
2153 natptr->r_index[1] = r_index >> 8;
2154 natptr->r_index[2] = r_index;
2155 natptr->r_type[0] =
2156 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2157 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2158 } else {
2159 natptr->r_index[2] = r_index >> 16;
2160 natptr->r_index[1] = r_index >> 8;
2161 natptr->r_index[0] = r_index;
2162 natptr->r_type[0] =
2163 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2164 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2165 }
2166
2167 PUT_WORD (abfd, r_addend, natptr->r_addend);
2168}
2169
2170/* BFD deals internally with all things based from the section they're
2171 in. so, something in 10 bytes into a text section with a base of
2172 50 would have a symbol (.text+10) and know .text vma was 50.
2173
2174 Aout keeps all it's symbols based from zero, so the symbol would
2175 contain 60. This macro subs the base of each section from the value
2176 to give the true offset from the section */
2177
252b5132
RH		 2178#define MOVE_ADDRESS(ad) \
2179 if (r_extern) { \
2180 /* undefined symbol */ \
2181 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2182 cache_ptr->addend = ad; \
2183 } else { \
2184 /* defined, section relative. replace symbol with pointer to \
2185 symbol which points to section */ \
2186 switch (r_index) { \
2187 case N_TEXT: \
2188 case N_TEXT | N_EXT: \
2189 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2190 cache_ptr->addend = ad - su->textsec->vma; \
2191 break; \
2192 case N_DATA: \
2193 case N_DATA | N_EXT: \
2194 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2195 cache_ptr->addend = ad - su->datasec->vma; \
2196 break; \
2197 case N_BSS: \
2198 case N_BSS | N_EXT: \
2199 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2200 cache_ptr->addend = ad - su->bsssec->vma; \
2201 break; \
2202 default: \
2203 case N_ABS: \
2204 case N_ABS | N_EXT: \
2205 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2206 cache_ptr->addend = ad; \
2207 break; \
2208 } \
2209 } \
2210
2211void
2212NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2213 bfd *abfd;
2214 struct reloc_ext_external *bytes;
2215 arelent *cache_ptr;
2216 asymbol **symbols;
2217 bfd_size_type symcount;
2218{
2219 unsigned int r_index;
2220 int r_extern;
2221 unsigned int r_type;
2222 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2223
2224 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2225
2226 /* now the fun stuff */
2227 if (bfd_header_big_endian (abfd)) {
2228 r_index = (bytes->r_index[0] << 16)
2229 | (bytes->r_index[1] << 8)
2230 | bytes->r_index[2];
2231 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2232 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2233 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2234 } else {
2235 r_index = (bytes->r_index[2] << 16)
2236 | (bytes->r_index[1] << 8)
2237 | bytes->r_index[0];
2238 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2239 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2240 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2241 }
2242
2243 cache_ptr->howto = howto_table_ext + r_type;
2244
2245 /* Base relative relocs are always against the symbol table,
2246 regardless of the setting of r_extern. r_extern just reflects
2247 whether the symbol the reloc is against is local or global. */
2248 if (r_type == RELOC_BASE10
2249 || r_type == RELOC_BASE13
2250 || r_type == RELOC_BASE22)
2251 r_extern = 1;
2252
2253 if (r_extern && r_index > symcount)
2254 {
2255 /* We could arrange to return an error, but it might be useful
2256 to see the file even if it is bad. */
2257 r_extern = 0;
2258 r_index = N_ABS;
2259 }
2260
2261 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2262}
2263
2264void
2265NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2266 bfd *abfd;
2267 struct reloc_std_external *bytes;
2268 arelent *cache_ptr;
2269 asymbol **symbols;
2270 bfd_size_type symcount;
2271{
2272 unsigned int r_index;
2273 int r_extern;
2274 unsigned int r_length;
2275 int r_pcrel;
2276 int r_baserel, r_jmptable, r_relative;
2277 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2278 unsigned int howto_idx;
2279
2280 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2281
2282 /* now the fun stuff */
2283 if (bfd_header_big_endian (abfd)) {
2284 r_index = (bytes->r_index[0] << 16)
2285 | (bytes->r_index[1] << 8)
2286 | bytes->r_index[2];
2287 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2288 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2289 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2290 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2291 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2292 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2293 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2294 } else {
2295 r_index = (bytes->r_index[2] << 16)
2296 | (bytes->r_index[1] << 8)
2297 | bytes->r_index[0];
2298 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2299 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2300 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2301 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2302 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2303 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2304 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2305 }
2306
2307 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2308 + 16 * r_jmptable + 32 * r_relative;
2309 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2310 cache_ptr->howto = howto_table_std + howto_idx;
2311 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2312
2313 /* Base relative relocs are always against the symbol table,
2314 regardless of the setting of r_extern. r_extern just reflects
2315 whether the symbol the reloc is against is local or global. */
2316 if (r_baserel)
2317 r_extern = 1;
2318
2319 if (r_extern && r_index > symcount)
2320 {
2321 /* We could arrange to return an error, but it might be useful
2322 to see the file even if it is bad. */
2323 r_extern = 0;
2324 r_index = N_ABS;
2325 }
2326
2327 MOVE_ADDRESS(0);
2328}
2329
2330/* Read and swap the relocs for a section. */
2331
2332boolean
2333NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2334 bfd *abfd;
2335 sec_ptr asect;
2336 asymbol **symbols;
2337{
2338 unsigned int count;
2339 bfd_size_type reloc_size;
2340 PTR relocs;
2341 arelent *reloc_cache;
2342 size_t each_size;
2343 unsigned int counter = 0;
2344 arelent *cache_ptr;
2345
2346 if (asect->relocation)
2347 return true;
2348
2349 if (asect->flags & SEC_CONSTRUCTOR)
2350 return true;
2351
2352 if (asect == obj_datasec (abfd))
2353 reloc_size = exec_hdr(abfd)->a_drsize;
2354 else if (asect == obj_textsec (abfd))
2355 reloc_size = exec_hdr(abfd)->a_trsize;
2356 else if (asect == obj_bsssec (abfd))
2357 reloc_size = 0;
2358 else
2359 {
2360 bfd_set_error (bfd_error_invalid_operation);
2361 return false;
2362 }
2363
2364 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2365 return false;
2366
2367 each_size = obj_reloc_entry_size (abfd);
2368
2369 count = reloc_size / each_size;
2370
2371 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2372 if (reloc_cache == NULL && count != 0)
2373 return false;
2374 memset (reloc_cache, 0, count * sizeof (arelent));
2375
2376 relocs = bfd_malloc ((size_t) reloc_size);
2377 if (relocs == NULL && reloc_size != 0)
2378 {
2379 free (reloc_cache);
2380 return false;
2381 }
2382
2383 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2384 {
2385 free (relocs);
2386 free (reloc_cache);
2387 return false;
2388 }
2389
2390 cache_ptr = reloc_cache;
2391 if (each_size == RELOC_EXT_SIZE)
2392 {
2393 register struct reloc_ext_external *rptr =
2394 (struct reloc_ext_external *) relocs;
2395
2396 for (; counter < count; counter++, rptr++, cache_ptr++)
1642229e
HPN		 2397 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2398 bfd_get_symcount (abfd));
252b5132
RH		 2399 }
2400 else
2401 {
2402 register struct reloc_std_external *rptr =
2403 (struct reloc_std_external *) relocs;
2404
2405 for (; counter < count; counter++, rptr++, cache_ptr++)
2406 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2407 bfd_get_symcount (abfd));
2408 }
2409
2410 free (relocs);
2411
2412 asect->relocation = reloc_cache;
2413 asect->reloc_count = cache_ptr - reloc_cache;
2414
2415 return true;
2416}
2417
2418/* Write out a relocation section into an object file. */
2419
2420boolean
2421NAME(aout,squirt_out_relocs) (abfd, section)
2422 bfd *abfd;
2423 asection *section;
2424{
2425 arelent **generic;
2426 unsigned char *native, *natptr;
2427 size_t each_size;
2428
2429 unsigned int count = section->reloc_count;
2430 size_t natsize;
2431
2432 if (count == 0 || section->orelocation == NULL)
2433 return true;
2434
2435 each_size = obj_reloc_entry_size (abfd);
2436 natsize = each_size * count;
2437 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2438 if (!native)
2439 return false;
2440
2441 generic = section->orelocation;
2442
2443 if (each_size == RELOC_EXT_SIZE)
2444 {
2445 for (natptr = native;
2446 count != 0;
2447 --count, natptr += each_size, ++generic)
1642229e
HPN		 2448 MY_swap_ext_reloc_out (abfd, *generic,
2449 (struct reloc_ext_external *) natptr);
252b5132
RH		 2450 }
2451 else
2452 {
2453 for (natptr = native;
2454 count != 0;
2455 --count, natptr += each_size, ++generic)
2456 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2457 }
2458
2459 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2460 bfd_release(abfd, native);
2461 return false;
2462 }
2463 bfd_release (abfd, native);
2464
2465 return true;
2466}
2467
2468/* This is stupid. This function should be a boolean predicate */
2469long
2470NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2471 bfd *abfd;
2472 sec_ptr section;
2473 arelent **relptr;
2474 asymbol **symbols;
2475{
2476 arelent *tblptr = section->relocation;
2477 unsigned int count;
2478
2479 if (section == obj_bsssec (abfd))
2480 {
2481 *relptr = NULL;
2482 return 0;
2483 }
2484
beb0d161 2485 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
252b5132
RH		 2486 return -1;
2487
2488 if (section->flags & SEC_CONSTRUCTOR) {
2489 arelent_chain *chain = section->constructor_chain;
2490 for (count = 0; count < section->reloc_count; count ++) {
2491 *relptr ++ = &chain->relent;
2492 chain = chain->next;
2493 }
2494 }
2495 else {
2496 tblptr = section->relocation;
2497
2498 for (count = 0; count++ < section->reloc_count;)
2499 {
2500 *relptr++ = tblptr++;
2501 }
2502 }
2503 *relptr = 0;
2504
2505 return section->reloc_count;
2506}
2507
2508long
2509NAME(aout,get_reloc_upper_bound) (abfd, asect)
2510 bfd *abfd;
2511 sec_ptr asect;
2512{
2513 if (bfd_get_format (abfd) != bfd_object) {
2514 bfd_set_error (bfd_error_invalid_operation);
2515 return -1;
2516 }
2517 if (asect->flags & SEC_CONSTRUCTOR) {
2518 return (sizeof (arelent *) * (asect->reloc_count+1));
2519 }
2520
2521 if (asect == obj_datasec (abfd))
2522 return (sizeof (arelent *)
2523 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2524 + 1));
2525
2526 if (asect == obj_textsec (abfd))
2527 return (sizeof (arelent *)
2528 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2529 + 1));
2530
2531 if (asect == obj_bsssec (abfd))
2532 return sizeof (arelent *);
2533
2534 if (asect == obj_bsssec (abfd))
2535 return 0;
2536
2537 bfd_set_error (bfd_error_invalid_operation);
2538 return -1;
2539}
2540
2541\f
2542long
2543NAME(aout,get_symtab_upper_bound) (abfd)
2544 bfd *abfd;
2545{
beb0d161 2546 if (!NAME(aout,slurp_symbol_table) (abfd))
252b5132
RH		 2547 return -1;
2548
2549 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2550}
2551
252b5132
RH		 2552 alent *
2553NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
7442e600
ILT		 2554 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2555 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
252b5132 2556{
7442e600 2557 return (alent *)NULL;
252b5132
RH		 2558}
2559
252b5132
RH		 2560void
2561NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
7442e600 2562 bfd *ignore_abfd ATTRIBUTE_UNUSED;
252b5132
RH		 2563 asymbol *symbol;
2564 symbol_info *ret;
2565{
2566 bfd_symbol_info (symbol, ret);
2567
2568 if (ret->type == '?')
2569 {
2570 int type_code = aout_symbol(symbol)->type & 0xff;
2571 const char *stab_name = bfd_get_stab_name (type_code);
2572 static char buf[10];
2573
2574 if (stab_name == NULL)
2575 {
e60b52c6 2576 sprintf (buf, "(%d)", type_code);
252b5132
RH		 2577 stab_name = buf;
2578 }
2579 ret->type = '-';
2580 ret->stab_type = type_code;
beb0d161
KH		 2581 ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff);
2582 ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff);
252b5132
RH		 2583 ret->stab_name = stab_name;
2584 }
2585}
2586
252b5132
RH		 2587void
2588NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
7442e600 2589 bfd *ignore_abfd ATTRIBUTE_UNUSED;
252b5132
RH		 2590 PTR afile;
2591 asymbol *symbol;
2592 bfd_print_symbol_type how;
2593{
2594 FILE *file = (FILE *)afile;
2595
2596 switch (how) {
2597 case bfd_print_symbol_name:
2598 if (symbol->name)
e60b52c6 2599 fprintf (file,"%s", symbol->name);
252b5132
RH		 2600 break;
2601 case bfd_print_symbol_more:
e60b52c6 2602 fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff),
beb0d161
KH		 2603 (unsigned) (aout_symbol(symbol)->other & 0xff),
2604 (unsigned) (aout_symbol(symbol)->type));
252b5132
RH		 2605 break;
2606 case bfd_print_symbol_all:
2607 {
2608 CONST char *section_name = symbol->section->name;
2609
252b5132
RH		 2610 bfd_print_symbol_vandf((PTR)file,symbol);
2611
e60b52c6 2612 fprintf (file," %-5s %04x %02x %02x",
252b5132 2613 section_name,
beb0d161
KH		 2614 (unsigned) (aout_symbol(symbol)->desc & 0xffff),
2615 (unsigned) (aout_symbol(symbol)->other & 0xff),
2616 (unsigned) (aout_symbol(symbol)->type & 0xff));
252b5132 2617 if (symbol->name)
e60b52c6 2618 fprintf (file," %s", symbol->name);
252b5132
RH		 2619 }
2620 break;
2621 }
2622}
2623
2624/* If we don't have to allocate more than 1MB to hold the generic
2625 symbols, we use the generic minisymbol methord: it's faster, since
2626 it only translates the symbols once, not multiple times. */
2627#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2628
2629/* Read minisymbols. For minisymbols, we use the unmodified a.out
2630 symbols. The minisymbol_to_symbol function translates these into
2631 BFD asymbol structures. */
2632
2633long
2634NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2635 bfd *abfd;
2636 boolean dynamic;
2637 PTR *minisymsp;
2638 unsigned int *sizep;
2639{
2640 if (dynamic)
2641 {
2642 /* We could handle the dynamic symbols here as well, but it's
2643 easier to hand them off. */
2644 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2645 }
2646
2647 if (! aout_get_external_symbols (abfd))
2648 return -1;
2649
2650 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2651 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2652
2653 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2654
2655 /* By passing the external symbols back from this routine, we are
2656 giving up control over the memory block. Clear
2657 obj_aout_external_syms, so that we do not try to free it
2658 ourselves. */
2659 obj_aout_external_syms (abfd) = NULL;
2660
2661 *sizep = EXTERNAL_NLIST_SIZE;
2662 return obj_aout_external_sym_count (abfd);
2663}
2664
2665/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2666 unmodified a.out symbol. The SYM argument is a structure returned
2667 by bfd_make_empty_symbol, which we fill in here. */
2668
2669asymbol *
2670NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2671 bfd *abfd;
2672 boolean dynamic;
2673 const PTR minisym;
2674 asymbol *sym;
2675{
2676 if (dynamic
2677 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2678 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2679
2680 memset (sym, 0, sizeof (aout_symbol_type));
2681
2682 /* We call translate_symbol_table to translate a single symbol. */
2683 if (! (NAME(aout,translate_symbol_table)
2684 (abfd,
2685 (aout_symbol_type *) sym,
2686 (struct external_nlist *) minisym,
2687 (bfd_size_type) 1,
2688 obj_aout_external_strings (abfd),
2689 obj_aout_external_string_size (abfd),
2690 false)))
2691 return NULL;
2692
2693 return sym;
2694}
2695
2696/*
2697 provided a BFD, a section and an offset into the section, calculate
2698 and return the name of the source file and the line nearest to the
2699 wanted location.
2700*/
2701
2702boolean
2703NAME(aout,find_nearest_line)
2704 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2705 bfd *abfd;
2706 asection *section;
2707 asymbol **symbols;
2708 bfd_vma offset;
2709 CONST char **filename_ptr;
2710 CONST char **functionname_ptr;
2711 unsigned int *line_ptr;
2712{
2713 /* Run down the file looking for the filename, function and linenumber */
2714 asymbol **p;
2715 CONST char *directory_name = NULL;
2716 CONST char *main_file_name = NULL;
2717 CONST char *current_file_name = NULL;
0ef5a5bd
KH		 2718 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2719 CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */
252b5132
RH		 2720 bfd_vma low_line_vma = 0;
2721 bfd_vma low_func_vma = 0;
2722 asymbol *func = 0;
2723 size_t filelen, funclen;
2724 char *buf;
2725
2726 *filename_ptr = abfd->filename;
2727 *functionname_ptr = 0;
2728 *line_ptr = 0;
2729 if (symbols != (asymbol **)NULL) {
2730 for (p = symbols; *p; p++) {
beb0d161 2731 aout_symbol_type *q = (aout_symbol_type *) (*p);
252b5132
RH		 2732 next:
2733 switch (q->type){
2734 case N_TEXT:
2735 /* If this looks like a file name symbol, and it comes after
2736 the line number we have found so far, but before the
2737 offset, then we have probably not found the right line
2738 number. */
2739 if (q->symbol.value <= offset
2740 && ((q->symbol.value > low_line_vma
2741 && (line_file_name != NULL
2742 || *line_ptr != 0))
2743 || (q->symbol.value > low_func_vma
2744 && func != NULL)))
2745 {
2746 const char *symname;
2747
2748 symname = q->symbol.name;
2749 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2750 {
2751 if (q->symbol.value > low_line_vma)
2752 {
2753 *line_ptr = 0;
2754 line_file_name = NULL;
2755 }
2756 if (q->symbol.value > low_func_vma)
2757 func = NULL;
2758 }
2759 }
2760 break;
2761
2762 case N_SO:
2763 /* If this symbol is less than the offset, but greater than
2764 the line number we have found so far, then we have not
2765 found the right line number. */
2766 if (q->symbol.value <= offset)
2767 {
2768 if (q->symbol.value > low_line_vma)
2769 {
2770 *line_ptr = 0;
2771 line_file_name = NULL;
2772 }
2773 if (q->symbol.value > low_func_vma)
2774 func = NULL;
2775 }
2776
2777 main_file_name = current_file_name = q->symbol.name;
0ef5a5bd 2778 /* Look ahead to next symbol to check if that too is an N_SO. */
252b5132
RH		 2779 p++;
2780 if (*p == NULL)
2781 break;
beb0d161 2782 q = (aout_symbol_type *) (*p);
252b5132
RH		 2783 if (q->type != (int)N_SO)
2784 goto next;
2785
0ef5a5bd 2786 /* Found a second N_SO First is directory; second is filename. */
252b5132
RH		 2787 directory_name = current_file_name;
2788 main_file_name = current_file_name = q->symbol.name;
2789 if (obj_textsec(abfd) != section)
2790 goto done;
2791 break;
2792 case N_SOL:
2793 current_file_name = q->symbol.name;
2794 break;
2795
2796 case N_SLINE:
2797
2798 case N_DSLINE:
2799 case N_BSLINE:
2800 /* We'll keep this if it resolves nearer than the one we have
2801 already. */
2802 if (q->symbol.value >= low_line_vma
2803 && q->symbol.value <= offset)
2804 {
2805 *line_ptr = q->desc;
2806 low_line_vma = q->symbol.value;
2807 line_file_name = current_file_name;
2808 line_directory_name = directory_name;
2809 }
2810 break;
2811 case N_FUN:
2812 {
2813 /* We'll keep this if it is nearer than the one we have already */
2814 if (q->symbol.value >= low_func_vma &&
2815 q->symbol.value <= offset) {
2816 low_func_vma = q->symbol.value;
2817 func = (asymbol *)q;
2818 }
2819 else if (q->symbol.value > offset)
2820 goto done;
2821 }
2822 break;
2823 }
2824 }
2825 }
2826
2827 done:
2828 if (*line_ptr != 0)
2829 {
2830 main_file_name = line_file_name;
2831 directory_name = line_directory_name;
2832 }
2833
2834 if (main_file_name == NULL
5af11cab 2835 || IS_ABSOLUTE_PATH (main_file_name)
252b5132
RH		 2836 || directory_name == NULL)
2837 filelen = 0;
2838 else
2839 filelen = strlen (directory_name) + strlen (main_file_name);
2840 if (func == NULL)
2841 funclen = 0;
2842 else
2843 funclen = strlen (bfd_asymbol_name (func));
2844
2845 if (adata (abfd).line_buf != NULL)
2846 free (adata (abfd).line_buf);
2847 if (filelen + funclen == 0)
2848 adata (abfd).line_buf = buf = NULL;
2849 else
2850 {
2851 buf = (char *) bfd_malloc (filelen + funclen + 3);
2852 adata (abfd).line_buf = buf;
2853 if (buf == NULL)
2854 return false;
2855 }
2856
2857 if (main_file_name != NULL)
2858 {
5af11cab 2859 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
252b5132
RH		 2860 *filename_ptr = main_file_name;
2861 else
2862 {
2863 sprintf (buf, "%s%s", directory_name, main_file_name);
2864 *filename_ptr = buf;
2865 buf += filelen + 1;
2866 }
2867 }
2868
2869 if (func)
2870 {
2871 const char *function = func->name;
2872 char *p;
2873
2874 /* The caller expects a symbol name. We actually have a
2875 function name, without the leading underscore. Put the
2876 underscore back in, so that the caller gets a symbol name. */
2877 if (bfd_get_symbol_leading_char (abfd) == '\0')
2878 strcpy (buf, function);
2879 else
2880 {
2881 buf[0] = bfd_get_symbol_leading_char (abfd);
2882 strcpy (buf + 1, function);
2883 }
2884 /* Have to remove : stuff */
2885 p = strchr (buf, ':');
2886 if (p != NULL)
2887 *p = '\0';
2888 *functionname_ptr = buf;
2889 }
2890
2891 return true;
2892}
2893
252b5132
RH		 2894int
2895NAME(aout,sizeof_headers) (abfd, execable)
2896 bfd *abfd;
7442e600 2897 boolean execable ATTRIBUTE_UNUSED;
252b5132
RH		 2898{
2899 return adata(abfd).exec_bytes_size;
2900}
2901
2902/* Free all information we have cached for this BFD. We can always
2903 read it again later if we need it. */
2904
2905boolean
2906NAME(aout,bfd_free_cached_info) (abfd)
2907 bfd *abfd;
2908{
2909 asection *o;
2910
2911 if (bfd_get_format (abfd) != bfd_object)
2912 return true;
2913
2914#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2915 BFCI_FREE (obj_aout_symbols (abfd));
2916#ifdef USE_MMAP
2917 obj_aout_external_syms (abfd) = 0;
2918 bfd_free_window (&obj_aout_sym_window (abfd));
2919 bfd_free_window (&obj_aout_string_window (abfd));
2920 obj_aout_external_strings (abfd) = 0;
2921#else
2922 BFCI_FREE (obj_aout_external_syms (abfd));
2923 BFCI_FREE (obj_aout_external_strings (abfd));
2924#endif
2925 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2926 BFCI_FREE (o->relocation);
2927#undef BFCI_FREE
2928
2929 return true;
2930}
2931\f
2932/* a.out link code. */
2933
2934static boolean aout_link_add_object_symbols
2935 PARAMS ((bfd *, struct bfd_link_info *));
2936static boolean aout_link_check_archive_element
2937 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2938static boolean aout_link_free_symbols PARAMS ((bfd *));
2939static boolean aout_link_check_ar_symbols
2940 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2941static boolean aout_link_add_symbols
2942 PARAMS ((bfd *, struct bfd_link_info *));
2943
2944/* Routine to create an entry in an a.out link hash table. */
2945
2946struct bfd_hash_entry *
2947NAME(aout,link_hash_newfunc) (entry, table, string)
2948 struct bfd_hash_entry *entry;
2949 struct bfd_hash_table *table;
2950 const char *string;
2951{
2952 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2953
2954 /* Allocate the structure if it has not already been allocated by a
2955 subclass. */
2956 if (ret == (struct aout_link_hash_entry *) NULL)
2957 ret = ((struct aout_link_hash_entry *)
2958 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2959 if (ret == (struct aout_link_hash_entry *) NULL)
2960 return (struct bfd_hash_entry *) ret;
2961
2962 /* Call the allocation method of the superclass. */
2963 ret = ((struct aout_link_hash_entry *)
2964 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2965 table, string));
2966 if (ret)
2967 {
2968 /* Set local fields. */
2969 ret->written = false;
2970 ret->indx = -1;
2971 }
2972
2973 return (struct bfd_hash_entry *) ret;
2974}
2975
2976/* Initialize an a.out link hash table. */
2977
2978boolean
2979NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2980 struct aout_link_hash_table *table;
2981 bfd *abfd;
2982 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2983 struct bfd_hash_table *,
2984 const char *));
2985{
2986 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2987}
2988
2989/* Create an a.out link hash table. */
2990
2991struct bfd_link_hash_table *
2992NAME(aout,link_hash_table_create) (abfd)
2993 bfd *abfd;
2994{
2995 struct aout_link_hash_table *ret;
2996
2997 ret = ((struct aout_link_hash_table *)
2998 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2999 if (ret == NULL)
3000 return (struct bfd_link_hash_table *) NULL;
3001 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3002 NAME(aout,link_hash_newfunc)))
3003 {
3004 free (ret);
3005 return (struct bfd_link_hash_table *) NULL;
3006 }
3007 return &ret->root;
3008}
3009
3010/* Given an a.out BFD, add symbols to the global hash table as
3011 appropriate. */
3012
3013boolean
3014NAME(aout,link_add_symbols) (abfd, info)
3015 bfd *abfd;
3016 struct bfd_link_info *info;
3017{
3018 switch (bfd_get_format (abfd))
3019 {
3020 case bfd_object:
3021 return aout_link_add_object_symbols (abfd, info);
3022 case bfd_archive:
3023 return _bfd_generic_link_add_archive_symbols
3024 (abfd, info, aout_link_check_archive_element);
3025 default:
3026 bfd_set_error (bfd_error_wrong_format);
3027 return false;
3028 }
3029}
3030
3031/* Add symbols from an a.out object file. */
3032
3033static boolean
3034aout_link_add_object_symbols (abfd, info)
3035 bfd *abfd;
3036 struct bfd_link_info *info;
3037{
3038 if (! aout_get_external_symbols (abfd))
3039 return false;
3040 if (! aout_link_add_symbols (abfd, info))
3041 return false;
3042 if (! info->keep_memory)
3043 {
3044 if (! aout_link_free_symbols (abfd))
3045 return false;
3046 }
3047 return true;
3048}
3049
3050/* Check a single archive element to see if we need to include it in
3051 the link. *PNEEDED is set according to whether this element is
3052 needed in the link or not. This is called from
3053 _bfd_generic_link_add_archive_symbols. */
3054
3055static boolean
3056aout_link_check_archive_element (abfd, info, pneeded)
3057 bfd *abfd;
3058 struct bfd_link_info *info;
3059 boolean *pneeded;
3060{
3061 if (! aout_get_external_symbols (abfd))
3062 return false;
3063
3064 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3065 return false;
3066
3067 if (*pneeded)
3068 {
3069 if (! aout_link_add_symbols (abfd, info))
3070 return false;
3071 }
3072
3073 if (! info->keep_memory || ! *pneeded)
3074 {
3075 if (! aout_link_free_symbols (abfd))
3076 return false;
3077 }
3078
3079 return true;
3080}
3081
3082/* Free up the internal symbols read from an a.out file. */
3083
3084static boolean
3085aout_link_free_symbols (abfd)
3086 bfd *abfd;
3087{
3088 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3089 {
3090#ifdef USE_MMAP
3091 bfd_free_window (&obj_aout_sym_window (abfd));
3092#else
3093 free ((PTR) obj_aout_external_syms (abfd));
3094#endif
3095 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3096 }
3097 if (obj_aout_external_strings (abfd) != (char *) NULL)
3098 {
3099#ifdef USE_MMAP
3100 bfd_free_window (&obj_aout_string_window (abfd));
3101#else
3102 free ((PTR) obj_aout_external_strings (abfd));
3103#endif
3104 obj_aout_external_strings (abfd) = (char *) NULL;
3105 }
3106 return true;
3107}
3108
3109/* Look through the internal symbols to see if this object file should
3110 be included in the link. We should include this object file if it
3111 defines any symbols which are currently undefined. If this object
3112 file defines a common symbol, then we may adjust the size of the
3113 known symbol but we do not include the object file in the link
3114 (unless there is some other reason to include it). */
3115
3116static boolean
3117aout_link_check_ar_symbols (abfd, info, pneeded)
3118 bfd *abfd;
3119 struct bfd_link_info *info;
3120 boolean *pneeded;
3121{
3122 register struct external_nlist *p;
3123 struct external_nlist *pend;
3124 char *strings;
3125
3126 *pneeded = false;
3127
3128 /* Look through all the symbols. */
3129 p = obj_aout_external_syms (abfd);
3130 pend = p + obj_aout_external_sym_count (abfd);
3131 strings = obj_aout_external_strings (abfd);
3132 for (; p < pend; p++)
3133 {
3134 int type = bfd_h_get_8 (abfd, p->e_type);
3135 const char *name;
3136 struct bfd_link_hash_entry *h;
3137
3138 /* Ignore symbols that are not externally visible. This is an
3139 optimization only, as we check the type more thoroughly
3140 below. */
3141 if (((type & N_EXT) == 0
3142 || (type & N_STAB) != 0
3143 || type == N_FN)
3144 && type != N_WEAKA
3145 && type != N_WEAKT
3146 && type != N_WEAKD
3147 && type != N_WEAKB)
3148 {
3149 if (type == N_WARNING
3150 || type == N_INDR)
3151 ++p;
3152 continue;
3153 }
3154
3155 name = strings + GET_WORD (abfd, p->e_strx);
3156 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3157
3158 /* We are only interested in symbols that are currently
3159 undefined or common. */
3160 if (h == (struct bfd_link_hash_entry *) NULL
3161 || (h->type != bfd_link_hash_undefined
3162 && h->type != bfd_link_hash_common))
3163 {
3164 if (type == (N_INDR | N_EXT))
3165 ++p;
3166 continue;
3167 }
3168
3169 if (type == (N_TEXT | N_EXT)
3170 || type == (N_DATA | N_EXT)
3171 || type == (N_BSS | N_EXT)
3172 || type == (N_ABS | N_EXT)
3173 || type == (N_INDR | N_EXT))
3174 {
3175 /* This object file defines this symbol. We must link it
3176 in. This is true regardless of whether the current
3177 definition of the symbol is undefined or common. If the
3178 current definition is common, we have a case in which we
3179 have already seen an object file including
3180 int a;
3181 and this object file from the archive includes
3182 int a = 5;
3183 In such a case we must include this object file.
3184
3185 FIXME: The SunOS 4.1.3 linker will pull in the archive
3186 element if the symbol is defined in the .data section,
3187 but not if it is defined in the .text section. That
3188 seems a bit crazy to me, and I haven't implemented it.
3189 However, it might be correct. */
3190 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3191 return false;
3192 *pneeded = true;
3193 return true;
3194 }
3195
3196 if (type == (N_UNDF | N_EXT))
3197 {
3198 bfd_vma value;
3199
3200 value = GET_WORD (abfd, p->e_value);
3201 if (value != 0)
3202 {
3203 /* This symbol is common in the object from the archive
3204 file. */
3205 if (h->type == bfd_link_hash_undefined)
3206 {
3207 bfd *symbfd;
3208 unsigned int power;
3209
3210 symbfd = h->u.undef.abfd;
3211 if (symbfd == (bfd *) NULL)
3212 {
3213 /* This symbol was created as undefined from
3214 outside BFD. We assume that we should link
3215 in the object file. This is done for the -u
3216 option in the linker. */
3217 if (! (*info->callbacks->add_archive_element) (info,
3218 abfd,
3219 name))
3220 return false;
3221 *pneeded = true;
3222 return true;
3223 }
3224 /* Turn the current link symbol into a common
3225 symbol. It is already on the undefs list. */
3226 h->type = bfd_link_hash_common;
3227 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3228 bfd_hash_allocate (&info->hash->table,
3229 sizeof (struct bfd_link_hash_common_entry)));
3230 if (h->u.c.p == NULL)
3231 return false;
3232
3233 h->u.c.size = value;
3234
3235 /* FIXME: This isn't quite right. The maximum
3236 alignment of a common symbol should be set by the
3237 architecture of the output file, not of the input
3238 file. */
3239 power = bfd_log2 (value);
3240 if (power > bfd_get_arch_info (abfd)->section_align_power)
3241 power = bfd_get_arch_info (abfd)->section_align_power;
3242 h->u.c.p->alignment_power = power;
3243
3244 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3245 "COMMON");
3246 }
3247 else
3248 {
3249 /* Adjust the size of the common symbol if
3250 necessary. */
3251 if (value > h->u.c.size)
3252 h->u.c.size = value;
3253 }
3254 }
3255 }
3256
3257 if (type == N_WEAKA
3258 || type == N_WEAKT
3259 || type == N_WEAKD
3260 || type == N_WEAKB)
3261 {
3262 /* This symbol is weak but defined. We must pull it in if
3263 the current link symbol is undefined, but we don't want
3264 it if the current link symbol is common. */
3265 if (h->type == bfd_link_hash_undefined)
3266 {
3267 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3268 return false;
3269 *pneeded = true;
3270 return true;
3271 }
3272 }
3273 }
3274
3275 /* We do not need this object file. */
3276 return true;
3277}
3278
3279/* Add all symbols from an object file to the hash table. */
3280
3281static boolean
3282aout_link_add_symbols (abfd, info)
3283 bfd *abfd;
3284 struct bfd_link_info *info;
3285{
3286 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3287 const char *, flagword, asection *,
3288 bfd_vma, const char *, boolean,
3289 boolean,
3290 struct bfd_link_hash_entry **));
3291 struct external_nlist *syms;
3292 bfd_size_type sym_count;
3293 char *strings;
3294 boolean copy;
3295 struct aout_link_hash_entry **sym_hash;
3296 register struct external_nlist *p;
3297 struct external_nlist *pend;
3298
3299 syms = obj_aout_external_syms (abfd);
3300 sym_count = obj_aout_external_sym_count (abfd);
3301 strings = obj_aout_external_strings (abfd);
3302 if (info->keep_memory)
3303 copy = false;
3304 else
3305 copy = true;
3306
3307 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3308 {
3309 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3310 (abfd, info, &syms, &sym_count, &strings)))
3311 return false;
3312 }
3313
3314 /* We keep a list of the linker hash table entries that correspond
3315 to particular symbols. We could just look them up in the hash
3316 table, but keeping the list is more efficient. Perhaps this
3317 should be conditional on info->keep_memory. */
3318 sym_hash = ((struct aout_link_hash_entry **)
3319 bfd_alloc (abfd,
3320 ((size_t) sym_count
3321 * sizeof (struct aout_link_hash_entry *))));
3322 if (sym_hash == NULL && sym_count != 0)
3323 return false;
3324 obj_aout_sym_hashes (abfd) = sym_hash;
3325
3326 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3327 if (add_one_symbol == NULL)
3328 add_one_symbol = _bfd_generic_link_add_one_symbol;
3329
3330 p = syms;
3331 pend = p + sym_count;
3332 for (; p < pend; p++, sym_hash++)
3333 {
3334 int type;
3335 const char *name;
3336 bfd_vma value;
3337 asection *section;
3338 flagword flags;
3339 const char *string;
3340
3341 *sym_hash = NULL;
3342
3343 type = bfd_h_get_8 (abfd, p->e_type);
3344
3345 /* Ignore debugging symbols. */
3346 if ((type & N_STAB) != 0)
3347 continue;
3348
3349 name = strings + GET_WORD (abfd, p->e_strx);
3350 value = GET_WORD (abfd, p->e_value);
3351 flags = BSF_GLOBAL;
3352 string = NULL;
3353 switch (type)
3354 {
3355 default:
3356 abort ();
3357
3358 case N_UNDF:
3359 case N_ABS:
3360 case N_TEXT:
3361 case N_DATA:
3362 case N_BSS:
3363 case N_FN_SEQ:
3364 case N_COMM:
3365 case N_SETV:
3366 case N_FN:
3367 /* Ignore symbols that are not externally visible. */
3368 continue;
3369 case N_INDR:
3370 /* Ignore local indirect symbol. */
3371 ++p;
3372 ++sym_hash;
3373 continue;
3374
3375 case N_UNDF | N_EXT:
3376 if (value == 0)
3377 {
3378 section = bfd_und_section_ptr;
3379 flags = 0;
3380 }
3381 else
3382 section = bfd_com_section_ptr;
3383 break;
3384 case N_ABS | N_EXT:
3385 section = bfd_abs_section_ptr;
3386 break;
3387 case N_TEXT | N_EXT:
3388 section = obj_textsec (abfd);
3389 value -= bfd_get_section_vma (abfd, section);
3390 break;
3391 case N_DATA | N_EXT:
3392 case N_SETV | N_EXT:
3393 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3394 translate_from_native_sym_flags. */
3395 section = obj_datasec (abfd);
3396 value -= bfd_get_section_vma (abfd, section);
3397 break;
3398 case N_BSS | N_EXT:
3399 section = obj_bsssec (abfd);
3400 value -= bfd_get_section_vma (abfd, section);
3401 break;
3402 case N_INDR | N_EXT:
3403 /* An indirect symbol. The next symbol is the symbol
3404 which this one really is. */
3405 BFD_ASSERT (p + 1 < pend);
3406 ++p;
3407 string = strings + GET_WORD (abfd, p->e_strx);
3408 section = bfd_ind_section_ptr;
3409 flags |= BSF_INDIRECT;
3410 break;
3411 case N_COMM | N_EXT:
3412 section = bfd_com_section_ptr;
3413 break;
3414 case N_SETA: case N_SETA | N_EXT:
3415 section = bfd_abs_section_ptr;
3416 flags |= BSF_CONSTRUCTOR;
3417 break;
3418 case N_SETT: case N_SETT | N_EXT:
3419 section = obj_textsec (abfd);
3420 flags |= BSF_CONSTRUCTOR;
3421 value -= bfd_get_section_vma (abfd, section);
3422 break;
3423 case N_SETD: case N_SETD | N_EXT:
3424 section = obj_datasec (abfd);
3425 flags |= BSF_CONSTRUCTOR;
3426 value -= bfd_get_section_vma (abfd, section);
3427 break;
3428 case N_SETB: case N_SETB | N_EXT:
3429 section = obj_bsssec (abfd);
3430 flags |= BSF_CONSTRUCTOR;
3431 value -= bfd_get_section_vma (abfd, section);
3432 break;
3433 case N_WARNING:
3434 /* A warning symbol. The next symbol is the one to warn
3435 about. */
3436 BFD_ASSERT (p + 1 < pend);
3437 ++p;
3438 string = name;
3439 name = strings + GET_WORD (abfd, p->e_strx);
3440 section = bfd_und_section_ptr;
3441 flags |= BSF_WARNING;
3442 break;
3443 case N_WEAKU:
3444 section = bfd_und_section_ptr;
3445 flags = BSF_WEAK;
3446 break;
3447 case N_WEAKA:
3448 section = bfd_abs_section_ptr;
3449 flags = BSF_WEAK;
3450 break;
3451 case N_WEAKT:
3452 section = obj_textsec (abfd);
3453 value -= bfd_get_section_vma (abfd, section);
3454 flags = BSF_WEAK;
3455 break;
3456 case N_WEAKD:
3457 section = obj_datasec (abfd);
3458 value -= bfd_get_section_vma (abfd, section);
3459 flags = BSF_WEAK;
3460 break;
3461 case N_WEAKB:
3462 section = obj_bsssec (abfd);
3463 value -= bfd_get_section_vma (abfd, section);
3464 flags = BSF_WEAK;
3465 break;
3466 }
3467
3468 if (! ((*add_one_symbol)
3469 (info, abfd, name, flags, section, value, string, copy, false,
3470 (struct bfd_link_hash_entry **) sym_hash)))
3471 return false;
3472
3473 /* Restrict the maximum alignment of a common symbol based on
3474 the architecture, since a.out has no way to represent
3475 alignment requirements of a section in a .o file. FIXME:
3476 This isn't quite right: it should use the architecture of the
3477 output file, not the input files. */
3478 if ((*sym_hash)->root.type == bfd_link_hash_common
3479 && ((*sym_hash)->root.u.c.p->alignment_power >
3480 bfd_get_arch_info (abfd)->section_align_power))
3481 (*sym_hash)->root.u.c.p->alignment_power =
3482 bfd_get_arch_info (abfd)->section_align_power;
3483
3484 /* If this is a set symbol, and we are not building sets, then
3485 it is possible for the hash entry to not have been set. In
3486 such a case, treat the symbol as not globally defined. */
3487 if ((*sym_hash)->root.type == bfd_link_hash_new)
3488 {
3489 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3490 *sym_hash = NULL;
3491 }
3492
3493 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3494 ++sym_hash;
3495 }
3496
3497 return true;
3498}
3499\f
3500/* A hash table used for header files with N_BINCL entries. */
3501
3502struct aout_link_includes_table
3503{
3504 struct bfd_hash_table root;
3505};
3506
3507/* A linked list of totals that we have found for a particular header
3508 file. */
3509
3510struct aout_link_includes_totals
3511{
3512 struct aout_link_includes_totals *next;
3513 bfd_vma total;
3514};
3515
3516/* An entry in the header file hash table. */
3517
3518struct aout_link_includes_entry
3519{
3520 struct bfd_hash_entry root;
3521 /* List of totals we have found for this file. */
3522 struct aout_link_includes_totals *totals;
3523};
3524
3525/* Look up an entry in an the header file hash table. */
3526
3527#define aout_link_includes_lookup(table, string, create, copy) \
3528 ((struct aout_link_includes_entry *) \
3529 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3530
3531/* During the final link step we need to pass around a bunch of
3532 information, so we do it in an instance of this structure. */
3533
3534struct aout_final_link_info
3535{
3536 /* General link information. */
3537 struct bfd_link_info *info;
3538 /* Output bfd. */
3539 bfd *output_bfd;
3540 /* Reloc file positions. */
3541 file_ptr treloff, dreloff;
3542 /* File position of symbols. */
3543 file_ptr symoff;
3544 /* String table. */
3545 struct bfd_strtab_hash *strtab;
3546 /* Header file hash table. */
3547 struct aout_link_includes_table includes;
3548 /* A buffer large enough to hold the contents of any section. */
3549 bfd_byte *contents;
3550 /* A buffer large enough to hold the relocs of any section. */
3551 PTR relocs;
3552 /* A buffer large enough to hold the symbol map of any input BFD. */
3553 int *symbol_map;
3554 /* A buffer large enough to hold output symbols of any input BFD. */
3555 struct external_nlist *output_syms;
3556};
3557
3558static struct bfd_hash_entry *aout_link_includes_newfunc
3559 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3560static boolean aout_link_input_bfd
3561 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3562static boolean aout_link_write_symbols
3563 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3564static boolean aout_link_write_other_symbol
3565 PARAMS ((struct aout_link_hash_entry *, PTR));
3566static boolean aout_link_input_section
3567 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3568 asection *input_section, file_ptr *reloff_ptr,
3569 bfd_size_type rel_size));
3570static boolean aout_link_input_section_std
3571 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3572 asection *input_section, struct reloc_std_external *,
3573 bfd_size_type rel_size, bfd_byte *contents));
3574static boolean aout_link_input_section_ext
3575 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3576 asection *input_section, struct reloc_ext_external *,
3577 bfd_size_type rel_size, bfd_byte *contents));
3578static INLINE asection *aout_reloc_index_to_section
3579 PARAMS ((bfd *, int));
3580static boolean aout_link_reloc_link_order
3581 PARAMS ((struct aout_final_link_info *, asection *,
3582 struct bfd_link_order *));
3583
3584/* The function to create a new entry in the header file hash table. */
3585
3586static struct bfd_hash_entry *
3587aout_link_includes_newfunc (entry, table, string)
3588 struct bfd_hash_entry *entry;
3589 struct bfd_hash_table *table;
3590 const char *string;
3591{
3592 struct aout_link_includes_entry *ret =
3593 (struct aout_link_includes_entry *) entry;
3594
3595 /* Allocate the structure if it has not already been allocated by a
3596 subclass. */
3597 if (ret == (struct aout_link_includes_entry *) NULL)
3598 ret = ((struct aout_link_includes_entry *)
3599 bfd_hash_allocate (table,
3600 sizeof (struct aout_link_includes_entry)));
3601 if (ret == (struct aout_link_includes_entry *) NULL)
3602 return (struct bfd_hash_entry *) ret;
3603
3604 /* Call the allocation method of the superclass. */
3605 ret = ((struct aout_link_includes_entry *)
3606 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3607 if (ret)
3608 {
3609 /* Set local fields. */
3610 ret->totals = NULL;
3611 }
3612
3613 return (struct bfd_hash_entry *) ret;
3614}
3615
3616/* Do the final link step. This is called on the output BFD. The
3617 INFO structure should point to a list of BFDs linked through the
3618 link_next field which can be used to find each BFD which takes part
3619 in the output. Also, each section in ABFD should point to a list
3620 of bfd_link_order structures which list all the input sections for
3621 the output section. */
3622
3623boolean
3624NAME(aout,final_link) (abfd, info, callback)
3625 bfd *abfd;
3626 struct bfd_link_info *info;
3627 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3628{
3629 struct aout_final_link_info aout_info;
3630 boolean includes_hash_initialized = false;
3631 register bfd *sub;
3632 bfd_size_type trsize, drsize;
3633 size_t max_contents_size;
3634 size_t max_relocs_size;
3635 size_t max_sym_count;
3636 bfd_size_type text_size;
3637 file_ptr text_end;
3638 register struct bfd_link_order *p;
3639 asection *o;
3640 boolean have_link_order_relocs;
3641
3642 if (info->shared)
3643 abfd->flags |= DYNAMIC;
3644
3645 aout_info.info = info;
3646 aout_info.output_bfd = abfd;
3647 aout_info.contents = NULL;
3648 aout_info.relocs = NULL;
3649 aout_info.symbol_map = NULL;
3650 aout_info.output_syms = NULL;
3651
3652 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3653 aout_link_includes_newfunc,
3654 251))
3655 goto error_return;
3656 includes_hash_initialized = true;
3657
3658 /* Figure out the largest section size. Also, if generating
3659 relocateable output, count the relocs. */
3660 trsize = 0;
3661 drsize = 0;
3662 max_contents_size = 0;
3663 max_relocs_size = 0;
3664 max_sym_count = 0;
3665 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3666 {
3667 size_t sz;
3668
3669 if (info->relocateable)
3670 {
3671 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3672 {
3673 trsize += exec_hdr (sub)->a_trsize;
3674 drsize += exec_hdr (sub)->a_drsize;
3675 }
3676 else
3677 {
3678 /* FIXME: We need to identify the .text and .data sections
3679 and call get_reloc_upper_bound and canonicalize_reloc to
3680 work out the number of relocs needed, and then multiply
3681 by the reloc size. */
3682 (*_bfd_error_handler)
3683 (_("%s: relocateable link from %s to %s not supported"),
3684 bfd_get_filename (abfd),
3685 sub->xvec->name, abfd->xvec->name);
3686 bfd_set_error (bfd_error_invalid_operation);
3687 goto error_return;
3688 }
3689 }
3690
3691 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3692 {
3693 sz = bfd_section_size (sub, obj_textsec (sub));
3694 if (sz > max_contents_size)
3695 max_contents_size = sz;
3696 sz = bfd_section_size (sub, obj_datasec (sub));
3697 if (sz > max_contents_size)
3698 max_contents_size = sz;
3699
3700 sz = exec_hdr (sub)->a_trsize;
3701 if (sz > max_relocs_size)
3702 max_relocs_size = sz;
3703 sz = exec_hdr (sub)->a_drsize;
3704 if (sz > max_relocs_size)
3705 max_relocs_size = sz;
3706
3707 sz = obj_aout_external_sym_count (sub);
3708 if (sz > max_sym_count)
3709 max_sym_count = sz;
3710 }
3711 }
3712
3713 if (info->relocateable)
3714 {
3715 if (obj_textsec (abfd) != (asection *) NULL)
3716 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3717 ->link_order_head)
3718 * obj_reloc_entry_size (abfd));
3719 if (obj_datasec (abfd) != (asection *) NULL)
3720 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3721 ->link_order_head)
3722 * obj_reloc_entry_size (abfd));
3723 }
3724
3725 exec_hdr (abfd)->a_trsize = trsize;
3726 exec_hdr (abfd)->a_drsize = drsize;
3727
3728 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3729
3730 /* Adjust the section sizes and vmas according to the magic number.
3731 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3732 filepos for each section. */
3733 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3734 goto error_return;
3735
3736 /* The relocation and symbol file positions differ among a.out
3737 targets. We are passed a callback routine from the backend
3738 specific code to handle this.
3739 FIXME: At this point we do not know how much space the symbol
3740 table will require. This will not work for any (nonstandard)
3741 a.out target that needs to know the symbol table size before it
3742 can compute the relocation file positions. This may or may not
3743 be the case for the hp300hpux target, for example. */
3744 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3745 &aout_info.symoff);
3746 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3747 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3748 obj_sym_filepos (abfd) = aout_info.symoff;
3749
3750 /* We keep a count of the symbols as we output them. */
3751 obj_aout_external_sym_count (abfd) = 0;
3752
3753 /* We accumulate the string table as we write out the symbols. */
3754 aout_info.strtab = _bfd_stringtab_init ();
3755 if (aout_info.strtab == NULL)
3756 goto error_return;
3757
3758 /* Allocate buffers to hold section contents and relocs. */
3759 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3760 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3761 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3762 aout_info.output_syms = ((struct external_nlist *)
3763 bfd_malloc ((max_sym_count + 1)
3764 * sizeof (struct external_nlist)));
3765 if ((aout_info.contents == NULL && max_contents_size != 0)
3766 || (aout_info.relocs == NULL && max_relocs_size != 0)
3767 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3768 || aout_info.output_syms == NULL)
3769 goto error_return;
3770
3771 /* If we have a symbol named __DYNAMIC, force it out now. This is
3772 required by SunOS. Doing this here rather than in sunos.c is a
3773 hack, but it's easier than exporting everything which would be
3774 needed. */
3775 {
3776 struct aout_link_hash_entry *h;
3777
3778 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3779 false, false, false);
3780 if (h != NULL)
3781 aout_link_write_other_symbol (h, &aout_info);
3782 }
3783
3784 /* The most time efficient way to do the link would be to read all
3785 the input object files into memory and then sort out the
3786 information into the output file. Unfortunately, that will
3787 probably use too much memory. Another method would be to step
3788 through everything that composes the text section and write it
3789 out, and then everything that composes the data section and write
3790 it out, and then write out the relocs, and then write out the
3791 symbols. Unfortunately, that requires reading stuff from each
3792 input file several times, and we will not be able to keep all the
3793 input files open simultaneously, and reopening them will be slow.
3794
3795 What we do is basically process one input file at a time. We do
3796 everything we need to do with an input file once--copy over the
3797 section contents, handle the relocation information, and write
3798 out the symbols--and then we throw away the information we read
3799 from it. This approach requires a lot of lseeks of the output
3800 file, which is unfortunate but still faster than reopening a lot
3801 of files.
3802
3803 We use the output_has_begun field of the input BFDs to see
3804 whether we have already handled it. */
3805 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3806 sub->output_has_begun = false;
3807
3808 /* Mark all sections which are to be included in the link. This
3809 will normally be every section. We need to do this so that we
3810 can identify any sections which the linker has decided to not
3811 include. */
3812 for (o = abfd->sections; o != NULL; o = o->next)
3813 {
3814 for (p = o->link_order_head; p != NULL; p = p->next)
3815 {
3816 if (p->type == bfd_indirect_link_order)
3817 p->u.indirect.section->linker_mark = true;
3818 }
3819 }
3820
3821 have_link_order_relocs = false;
3822 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3823 {
3824 for (p = o->link_order_head;
3825 p != (struct bfd_link_order *) NULL;
3826 p = p->next)
3827 {
3828 if (p->type == bfd_indirect_link_order
3829 && (bfd_get_flavour (p->u.indirect.section->owner)
3830 == bfd_target_aout_flavour))
3831 {
3832 bfd *input_bfd;
3833
3834 input_bfd = p->u.indirect.section->owner;
3835 if (! input_bfd->output_has_begun)
3836 {
3837 if (! aout_link_input_bfd (&aout_info, input_bfd))
3838 goto error_return;
3839 input_bfd->output_has_begun = true;
3840 }
3841 }
3842 else if (p->type == bfd_section_reloc_link_order
3843 || p->type == bfd_symbol_reloc_link_order)
3844 {
3845 /* These are handled below. */
3846 have_link_order_relocs = true;
3847 }
3848 else
3849 {
3850 if (! _bfd_default_link_order (abfd, info, o, p))
3851 goto error_return;
3852 }
3853 }
3854 }
3855
3856 /* Write out any symbols that we have not already written out. */
3857 aout_link_hash_traverse (aout_hash_table (info),
3858 aout_link_write_other_symbol,
3859 (PTR) &aout_info);
3860
3861 /* Now handle any relocs we were asked to create by the linker.
3862 These did not come from any input file. We must do these after
3863 we have written out all the symbols, so that we know the symbol
3864 indices to use. */
3865 if (have_link_order_relocs)
3866 {
3867 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3868 {
3869 for (p = o->link_order_head;
3870 p != (struct bfd_link_order *) NULL;
3871 p = p->next)
3872 {
3873 if (p->type == bfd_section_reloc_link_order
3874 || p->type == bfd_symbol_reloc_link_order)
3875 {
3876 if (! aout_link_reloc_link_order (&aout_info, o, p))
3877 goto error_return;
3878 }
3879 }
3880 }
3881 }
3882
3883 if (aout_info.contents != NULL)
3884 {
3885 free (aout_info.contents);
3886 aout_info.contents = NULL;
3887 }
3888 if (aout_info.relocs != NULL)
3889 {
3890 free (aout_info.relocs);
3891 aout_info.relocs = NULL;
3892 }
3893 if (aout_info.symbol_map != NULL)
3894 {
3895 free (aout_info.symbol_map);
3896 aout_info.symbol_map = NULL;
3897 }
3898 if (aout_info.output_syms != NULL)
3899 {
3900 free (aout_info.output_syms);
3901 aout_info.output_syms = NULL;
3902 }
3903 if (includes_hash_initialized)
3904 {
3905 bfd_hash_table_free (&aout_info.includes.root);
3906 includes_hash_initialized = false;
3907 }
3908
3909 /* Finish up any dynamic linking we may be doing. */
3910 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3911 {
3912 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3913 goto error_return;
3914 }
3915
3916 /* Update the header information. */
3917 abfd->symcount = obj_aout_external_sym_count (abfd);
3918 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3919 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3920 obj_textsec (abfd)->reloc_count =
3921 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3922 obj_datasec (abfd)->reloc_count =
3923 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3924
3925 /* Write out the string table, unless there are no symbols. */
3926 if (abfd->symcount > 0)
3927 {
3928 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
3929 || ! emit_stringtab (abfd, aout_info.strtab))
3930 goto error_return;
3931 }
3932 else if (obj_textsec (abfd)->reloc_count == 0
3933 && obj_datasec (abfd)->reloc_count == 0)
3934 {
3935 bfd_byte b;
3936
3937 b = 0;
3938 if (bfd_seek (abfd,
3939 (obj_datasec (abfd)->filepos
3940 + exec_hdr (abfd)->a_data
3941 - 1),
3942 SEEK_SET) != 0
3943 || bfd_write (&b, 1, 1, abfd) != 1)
3944 goto error_return;
3945 }
3946
3947 return true;
3948
3949 error_return:
3950 if (aout_info.contents != NULL)
3951 free (aout_info.contents);
3952 if (aout_info.relocs != NULL)
3953 free (aout_info.relocs);
3954 if (aout_info.symbol_map != NULL)
3955 free (aout_info.symbol_map);
3956 if (aout_info.output_syms != NULL)
3957 free (aout_info.output_syms);
3958 if (includes_hash_initialized)
3959 bfd_hash_table_free (&aout_info.includes.root);
3960 return false;
3961}
3962
3963/* Link an a.out input BFD into the output file. */
3964
3965static boolean
3966aout_link_input_bfd (finfo, input_bfd)
3967 struct aout_final_link_info *finfo;
3968 bfd *input_bfd;
3969{
3970 bfd_size_type sym_count;
3971
3972 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3973
3974 /* If this is a dynamic object, it may need special handling. */
3975 if ((input_bfd->flags & DYNAMIC) != 0
3976 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3977 {
3978 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3979 (finfo->info, input_bfd));
3980 }
3981
3982 /* Get the symbols. We probably have them already, unless
3983 finfo->info->keep_memory is false. */
3984 if (! aout_get_external_symbols (input_bfd))
3985 return false;
3986
3987 sym_count = obj_aout_external_sym_count (input_bfd);
3988
3989 /* Write out the symbols and get a map of the new indices. The map
3990 is placed into finfo->symbol_map. */
3991 if (! aout_link_write_symbols (finfo, input_bfd))
3992 return false;
3993
3994 /* Relocate and write out the sections. These functions use the
3995 symbol map created by aout_link_write_symbols. The linker_mark
3996 field will be set if these sections are to be included in the
3997 link, which will normally be the case. */
3998 if (obj_textsec (input_bfd)->linker_mark)
3999 {
4000 if (! aout_link_input_section (finfo, input_bfd,
4001 obj_textsec (input_bfd),
4002 &finfo->treloff,
4003 exec_hdr (input_bfd)->a_trsize))
4004 return false;
4005 }
4006 if (obj_datasec (input_bfd)->linker_mark)
4007 {
4008 if (! aout_link_input_section (finfo, input_bfd,
4009 obj_datasec (input_bfd),
4010 &finfo->dreloff,
4011 exec_hdr (input_bfd)->a_drsize))
4012 return false;
4013 }
4014
4015 /* If we are not keeping memory, we don't need the symbols any
4016 longer. We still need them if we are keeping memory, because the
4017 strings in the hash table point into them. */
4018 if (! finfo->info->keep_memory)
4019 {
4020 if (! aout_link_free_symbols (input_bfd))
4021 return false;
4022 }
4023
4024 return true;
4025}
4026
4027/* Adjust and write out the symbols for an a.out file. Set the new
4028 symbol indices into a symbol_map. */
4029
4030static boolean
4031aout_link_write_symbols (finfo, input_bfd)
4032 struct aout_final_link_info *finfo;
4033 bfd *input_bfd;
4034{
4035 bfd *output_bfd;
4036 bfd_size_type sym_count;
4037 char *strings;
4038 enum bfd_link_strip strip;
4039 enum bfd_link_discard discard;
4040 struct external_nlist *outsym;
4041 bfd_size_type strtab_index;
4042 register struct external_nlist *sym;
4043 struct external_nlist *sym_end;
4044 struct aout_link_hash_entry **sym_hash;
4045 int *symbol_map;
4046 boolean pass;
4047 boolean skip_next;
4048
4049 output_bfd = finfo->output_bfd;
4050 sym_count = obj_aout_external_sym_count (input_bfd);
4051 strings = obj_aout_external_strings (input_bfd);
4052 strip = finfo->info->strip;
4053 discard = finfo->info->discard;
4054 outsym = finfo->output_syms;
4055
4056 /* First write out a symbol for this object file, unless we are
4057 discarding such symbols. */
4058 if (strip != strip_all
4059 && (strip != strip_some
4060 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4061 false, false) != NULL)
4062 && discard != discard_all)
4063 {
4064 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
4065 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
4066 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
4067 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4068 input_bfd->filename, false);
4069 if (strtab_index == (bfd_size_type) -1)
4070 return false;
4071 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4072 PUT_WORD (output_bfd,
4073 (bfd_get_section_vma (output_bfd,
4074 obj_textsec (input_bfd)->output_section)
4075 + obj_textsec (input_bfd)->output_offset),
4076 outsym->e_value);
4077 ++obj_aout_external_sym_count (output_bfd);
4078 ++outsym;
4079 }
4080
4081 pass = false;
4082 skip_next = false;
4083 sym = obj_aout_external_syms (input_bfd);
4084 sym_end = sym + sym_count;
4085 sym_hash = obj_aout_sym_hashes (input_bfd);
4086 symbol_map = finfo->symbol_map;
4087 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
4088 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4089 {
4090 const char *name;
4091 int type;
4092 struct aout_link_hash_entry *h;
4093 boolean skip;
4094 asection *symsec;
4095 bfd_vma val = 0;
4096 boolean copy;
4097
4098 /* We set *symbol_map to 0 above for all symbols. If it has
4099 already been set to -1 for this symbol, it means that we are
4100 discarding it because it appears in a duplicate header file.
4101 See the N_BINCL code below. */
4102 if (*symbol_map == -1)
4103 continue;
4104
4105 /* Initialize *symbol_map to -1, which means that the symbol was
4106 not copied into the output file. We will change it later if
4107 we do copy the symbol over. */
4108 *symbol_map = -1;
4109
4110 type = bfd_h_get_8 (input_bfd, sym->e_type);
4111 name = strings + GET_WORD (input_bfd, sym->e_strx);
4112
4113 h = NULL;
4114
4115 if (pass)
4116 {
4117 /* Pass this symbol through. It is the target of an
4118 indirect or warning symbol. */
4119 val = GET_WORD (input_bfd, sym->e_value);
4120 pass = false;
4121 }
4122 else if (skip_next)
4123 {
4124 /* Skip this symbol, which is the target of an indirect
4125 symbol that we have changed to no longer be an indirect
4126 symbol. */
4127 skip_next = false;
4128 continue;
4129 }
4130 else
4131 {
4132 struct aout_link_hash_entry *hresolve;
4133
4134 /* We have saved the hash table entry for this symbol, if
4135 there is one. Note that we could just look it up again
4136 in the hash table, provided we first check that it is an
0ef5a5bd 4137 external symbol. */
252b5132
RH		 4138 h = *sym_hash;
4139
4140 /* Use the name from the hash table, in case the symbol was
4141 wrapped. */
4142 if (h != NULL)
4143 name = h->root.root.string;
4144
4145 /* If this is an indirect or warning symbol, then change
4146 hresolve to the base symbol. We also change *sym_hash so
4147 that the relocation routines relocate against the real
4148 symbol. */
4149 hresolve = h;
4150 if (h != (struct aout_link_hash_entry *) NULL
4151 && (h->root.type == bfd_link_hash_indirect
4152 || h->root.type == bfd_link_hash_warning))
4153 {
4154 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4155 while (hresolve->root.type == bfd_link_hash_indirect
4156 || hresolve->root.type == bfd_link_hash_warning)
4157 hresolve = ((struct aout_link_hash_entry *)
4158 hresolve->root.u.i.link);
4159 *sym_hash = hresolve;
4160 }
4161
4162 /* If the symbol has already been written out, skip it. */
4163 if (h != (struct aout_link_hash_entry *) NULL
4164 && h->root.type != bfd_link_hash_warning
4165 && h->written)
4166 {
4167 if ((type & N_TYPE) == N_INDR
4168 || type == N_WARNING)
4169 skip_next = true;
4170 *symbol_map = h->indx;
4171 continue;
4172 }
4173
4174 /* See if we are stripping this symbol. */
4175 skip = false;
4176 switch (strip)
4177 {
4178 case strip_none:
4179 break;
4180 case strip_debugger:
4181 if ((type & N_STAB) != 0)
4182 skip = true;
4183 break;
4184 case strip_some:
4185 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4186 == NULL)
4187 skip = true;
4188 break;
4189 case strip_all:
4190 skip = true;
4191 break;
4192 }
4193 if (skip)
4194 {
4195 if (h != (struct aout_link_hash_entry *) NULL)
4196 h->written = true;
4197 continue;
4198 }
4199
4200 /* Get the value of the symbol. */
4201 if ((type & N_TYPE) == N_TEXT
4202 || type == N_WEAKT)
4203 symsec = obj_textsec (input_bfd);
4204 else if ((type & N_TYPE) == N_DATA
4205 || type == N_WEAKD)
4206 symsec = obj_datasec (input_bfd);
4207 else if ((type & N_TYPE) == N_BSS
4208 || type == N_WEAKB)
4209 symsec = obj_bsssec (input_bfd);
4210 else if ((type & N_TYPE) == N_ABS
4211 || type == N_WEAKA)
4212 symsec = bfd_abs_section_ptr;
4213 else if (((type & N_TYPE) == N_INDR
4214 && (hresolve == (struct aout_link_hash_entry *) NULL
4215 || (hresolve->root.type != bfd_link_hash_defined
4216 && hresolve->root.type != bfd_link_hash_defweak
4217 && hresolve->root.type != bfd_link_hash_common)))
4218 || type == N_WARNING)
4219 {
4220 /* Pass the next symbol through unchanged. The
4221 condition above for indirect symbols is so that if
4222 the indirect symbol was defined, we output it with
4223 the correct definition so the debugger will
4224 understand it. */
4225 pass = true;
4226 val = GET_WORD (input_bfd, sym->e_value);
4227 symsec = NULL;
4228 }
4229 else if ((type & N_STAB) != 0)
4230 {
4231 val = GET_WORD (input_bfd, sym->e_value);
4232 symsec = NULL;
4233 }
4234 else
4235 {
4236 /* If we get here with an indirect symbol, it means that
4237 we are outputting it with a real definition. In such
4238 a case we do not want to output the next symbol,
4239 which is the target of the indirection. */
4240 if ((type & N_TYPE) == N_INDR)
4241 skip_next = true;
4242
4243 symsec = NULL;
4244
4245 /* We need to get the value from the hash table. We use
4246 hresolve so that if we have defined an indirect
4247 symbol we output the final definition. */
4248 if (h == (struct aout_link_hash_entry *) NULL)
4249 {
4250 switch (type & N_TYPE)
4251 {
4252 case N_SETT:
4253 symsec = obj_textsec (input_bfd);
4254 break;
4255 case N_SETD:
4256 symsec = obj_datasec (input_bfd);
4257 break;
4258 case N_SETB:
4259 symsec = obj_bsssec (input_bfd);
4260 break;
4261 case N_SETA:
4262 symsec = bfd_abs_section_ptr;
4263 break;
4264 default:
4265 val = 0;
4266 break;
4267 }
4268 }
4269 else if (hresolve->root.type == bfd_link_hash_defined
4270 || hresolve->root.type == bfd_link_hash_defweak)
4271 {
4272 asection *input_section;
4273 asection *output_section;
4274
4275 /* This case usually means a common symbol which was
4276 turned into a defined symbol. */
4277 input_section = hresolve->root.u.def.section;
4278 output_section = input_section->output_section;
4279 BFD_ASSERT (bfd_is_abs_section (output_section)
4280 || output_section->owner == output_bfd);
4281 val = (hresolve->root.u.def.value
4282 + bfd_get_section_vma (output_bfd, output_section)
4283 + input_section->output_offset);
4284
4285 /* Get the correct type based on the section. If
4286 this is a constructed set, force it to be
4287 globally visible. */
4288 if (type == N_SETT
4289 || type == N_SETD
4290 || type == N_SETB
4291 || type == N_SETA)
4292 type |= N_EXT;
4293
4294 type &=~ N_TYPE;
4295
4296 if (output_section == obj_textsec (output_bfd))
4297 type |= (hresolve->root.type == bfd_link_hash_defined
4298 ? N_TEXT
4299 : N_WEAKT);
4300 else if (output_section == obj_datasec (output_bfd))
4301 type |= (hresolve->root.type == bfd_link_hash_defined
4302 ? N_DATA
4303 : N_WEAKD);
4304 else if (output_section == obj_bsssec (output_bfd))
4305 type |= (hresolve->root.type == bfd_link_hash_defined
4306 ? N_BSS
4307 : N_WEAKB);
4308 else
4309 type |= (hresolve->root.type == bfd_link_hash_defined
4310 ? N_ABS
4311 : N_WEAKA);
4312 }
4313 else if (hresolve->root.type == bfd_link_hash_common)
4314 val = hresolve->root.u.c.size;
4315 else if (hresolve->root.type == bfd_link_hash_undefweak)
4316 {
4317 val = 0;
4318 type = N_WEAKU;
4319 }
4320 else
4321 val = 0;
4322 }
4323 if (symsec != (asection *) NULL)
4324 val = (symsec->output_section->vma
4325 + symsec->output_offset
4326 + (GET_WORD (input_bfd, sym->e_value)
4327 - symsec->vma));
4328
4329 /* If this is a global symbol set the written flag, and if
4330 it is a local symbol see if we should discard it. */
4331 if (h != (struct aout_link_hash_entry *) NULL)
4332 {
4333 h->written = true;
4334 h->indx = obj_aout_external_sym_count (output_bfd);
4335 }
4336 else if ((type & N_TYPE) != N_SETT
4337 && (type & N_TYPE) != N_SETD
4338 && (type & N_TYPE) != N_SETB
4339 && (type & N_TYPE) != N_SETA)
4340 {
4341 switch (discard)
4342 {
4343 case discard_none:
4344 break;
4345 case discard_l:
4346 if ((type & N_STAB) == 0
4347 && bfd_is_local_label_name (input_bfd, name))
4348 skip = true;
4349 break;
4350 case discard_all:
4351 skip = true;
4352 break;
4353 }
4354 if (skip)
4355 {
4356 pass = false;
4357 continue;
4358 }
4359 }
4360
4361 /* An N_BINCL symbol indicates the start of the stabs
4362 entries for a header file. We need to scan ahead to the
4363 next N_EINCL symbol, ignoring nesting, adding up all the
4364 characters in the symbol names, not including the file
4365 numbers in types (the first number after an open
4366 parenthesis). */
4367 if (type == N_BINCL)
4368 {
4369 struct external_nlist *incl_sym;
4370 int nest;
4371 struct aout_link_includes_entry *incl_entry;
4372 struct aout_link_includes_totals *t;
4373
4374 val = 0;
4375 nest = 0;
4376 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4377 {
4378 int incl_type;
4379
4380 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4381 if (incl_type == N_EINCL)
4382 {
4383 if (nest == 0)
4384 break;
4385 --nest;
4386 }
4387 else if (incl_type == N_BINCL)
4388 ++nest;
4389 else if (nest == 0)
4390 {
4391 const char *s;
4392
4393 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4394 for (; *s != '\0'; s++)
4395 {
4396 val += *s;
4397 if (*s == '(')
4398 {
4399 /* Skip the file number. */
4400 ++s;
4401 while (isdigit ((unsigned char) *s))
4402 ++s;
4403 --s;
4404 }
4405 }
4406 }
4407 }
4408
4409 /* If we have already included a header file with the
4410 same value, then replace this one with an N_EXCL
4411 symbol. */
4412 copy = ! finfo->info->keep_memory;
4413 incl_entry = aout_link_includes_lookup (&finfo->includes,
4414 name, true, copy);
4415 if (incl_entry == NULL)
4416 return false;
4417 for (t = incl_entry->totals; t != NULL; t = t->next)
4418 if (t->total == val)
4419 break;
4420 if (t == NULL)
4421 {
4422 /* This is the first time we have seen this header
4423 file with this set of stabs strings. */
4424 t = ((struct aout_link_includes_totals *)
4425 bfd_hash_allocate (&finfo->includes.root,
4426 sizeof *t));
4427 if (t == NULL)
4428 return false;
4429 t->total = val;
4430 t->next = incl_entry->totals;
4431 incl_entry->totals = t;
4432 }
4433 else
4434 {
4435 int *incl_map;
4436
4437 /* This is a duplicate header file. We must change
4438 it to be an N_EXCL entry, and mark all the
4439 included symbols to prevent outputting them. */
4440 type = N_EXCL;
4441
4442 nest = 0;
4443 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4444 incl_sym < sym_end;
4445 incl_sym++, incl_map++)
4446 {
4447 int incl_type;
4448
4449 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4450 if (incl_type == N_EINCL)
4451 {
4452 if (nest == 0)
4453 {
4454 *incl_map = -1;
4455 break;
4456 }
4457 --nest;
4458 }
4459 else if (incl_type == N_BINCL)
4460 ++nest;
4461 else if (nest == 0)
4462 *incl_map = -1;
4463 }
4464 }
4465 }
4466 }
4467
4468 /* Copy this symbol into the list of symbols we are going to
4469 write out. */
4470 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4471 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4472 outsym->e_other);
4473 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4474 outsym->e_desc);
4475 copy = false;
4476 if (! finfo->info->keep_memory)
4477 {
4478 /* name points into a string table which we are going to
4479 free. If there is a hash table entry, use that string.
4480 Otherwise, copy name into memory. */
4481 if (h != (struct aout_link_hash_entry *) NULL)
4482 name = h->root.root.string;
4483 else
4484 copy = true;
4485 }
4486 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4487 name, copy);
4488 if (strtab_index == (bfd_size_type) -1)
4489 return false;
4490 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4491 PUT_WORD (output_bfd, val, outsym->e_value);
4492 *symbol_map = obj_aout_external_sym_count (output_bfd);
4493 ++obj_aout_external_sym_count (output_bfd);
4494 ++outsym;
4495 }
4496
4497 /* Write out the output symbols we have just constructed. */
4498 if (outsym > finfo->output_syms)
4499 {
4500 bfd_size_type outsym_count;
4501
4502 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4503 return false;
4504 outsym_count = outsym - finfo->output_syms;
4505 if (bfd_write ((PTR) finfo->output_syms,
4506 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4507 (bfd_size_type) outsym_count, output_bfd)
4508 != outsym_count * EXTERNAL_NLIST_SIZE)
4509 return false;
4510 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4511 }
4512
4513 return true;
4514}
4515
4516/* Write out a symbol that was not associated with an a.out input
4517 object. */
4518
4519static boolean
4520aout_link_write_other_symbol (h, data)
4521 struct aout_link_hash_entry *h;
4522 PTR data;
4523{
4524 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4525 bfd *output_bfd;
4526 int type;
4527 bfd_vma val;
4528 struct external_nlist outsym;
4529 bfd_size_type indx;
4530
4531 output_bfd = finfo->output_bfd;
4532
4533 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4534 {
4535 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4536 (output_bfd, finfo->info, h)))
4537 {
4538 /* FIXME: No way to handle errors. */
4539 abort ();
4540 }
4541 }
4542
4543 if (h->written)
4544 return true;
4545
4546 h->written = true;
4547
4548 /* An indx of -2 means the symbol must be written. */
4549 if (h->indx != -2
4550 && (finfo->info->strip == strip_all
4551 || (finfo->info->strip == strip_some
4552 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4553 false, false) == NULL)))
4554 return true;
4555
4556 switch (h->root.type)
4557 {
4558 default:
4559 abort ();
4560 /* Avoid variable not initialized warnings. */
4561 return true;
4562 case bfd_link_hash_new:
4563 /* This can happen for set symbols when sets are not being
4564 built. */
4565 return true;
4566 case bfd_link_hash_undefined:
4567 type = N_UNDF | N_EXT;
4568 val = 0;
4569 break;
4570 case bfd_link_hash_defined:
4571 case bfd_link_hash_defweak:
4572 {
4573 asection *sec;
4574
4575 sec = h->root.u.def.section->output_section;
4576 BFD_ASSERT (bfd_is_abs_section (sec)
4577 || sec->owner == output_bfd);
4578 if (sec == obj_textsec (output_bfd))
4579 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4580 else if (sec == obj_datasec (output_bfd))
4581 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4582 else if (sec == obj_bsssec (output_bfd))
4583 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4584 else
4585 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4586 type |= N_EXT;
4587 val = (h->root.u.def.value
4588 + sec->vma
4589 + h->root.u.def.section->output_offset);
4590 }
4591 break;
4592 case bfd_link_hash_common:
4593 type = N_UNDF | N_EXT;
4594 val = h->root.u.c.size;
4595 break;
4596 case bfd_link_hash_undefweak:
4597 type = N_WEAKU;
4598 val = 0;
4599 case bfd_link_hash_indirect:
4600 case bfd_link_hash_warning:
4601 /* FIXME: Ignore these for now. The circumstances under which
4602 they should be written out are not clear to me. */
4603 return true;
4604 }
4605
4606 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4607 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4608 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4609 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4610 false);
4611 if (indx == (bfd_size_type) -1)
4612 {
4613 /* FIXME: No way to handle errors. */
4614 abort ();
4615 }
4616 PUT_WORD (output_bfd, indx, outsym.e_strx);
4617 PUT_WORD (output_bfd, val, outsym.e_value);
4618
4619 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4620 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4621 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4622 {
4623 /* FIXME: No way to handle errors. */
4624 abort ();
4625 }
4626
4627 finfo->symoff += EXTERNAL_NLIST_SIZE;
4628 h->indx = obj_aout_external_sym_count (output_bfd);
4629 ++obj_aout_external_sym_count (output_bfd);
4630
4631 return true;
4632}
4633
4634/* Link an a.out section into the output file. */
4635
4636static boolean
4637aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4638 rel_size)
4639 struct aout_final_link_info *finfo;
4640 bfd *input_bfd;
4641 asection *input_section;
4642 file_ptr *reloff_ptr;
4643 bfd_size_type rel_size;
4644{
4645 bfd_size_type input_size;
4646 PTR relocs;
4647
4648 /* Get the section contents. */
4649 input_size = bfd_section_size (input_bfd, input_section);
4650 if (! bfd_get_section_contents (input_bfd, input_section,
4651 (PTR) finfo->contents,
4652 (file_ptr) 0, input_size))
4653 return false;
4654
4655 /* Read in the relocs if we haven't already done it. */
4656 if (aout_section_data (input_section) != NULL
4657 && aout_section_data (input_section)->relocs != NULL)
4658 relocs = aout_section_data (input_section)->relocs;
4659 else
4660 {
4661 relocs = finfo->relocs;
4662 if (rel_size > 0)
4663 {
4664 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4665 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4666 return false;
4667 }
4668 }
4669
4670 /* Relocate the section contents. */
4671 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4672 {
4673 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4674 (struct reloc_std_external *) relocs,
4675 rel_size, finfo->contents))
4676 return false;
4677 }
4678 else
4679 {
4680 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4681 (struct reloc_ext_external *) relocs,
4682 rel_size, finfo->contents))
4683 return false;
4684 }
4685
4686 /* Write out the section contents. */
4687 if (! bfd_set_section_contents (finfo->output_bfd,
4688 input_section->output_section,
4689 (PTR) finfo->contents,
4690 input_section->output_offset,
4691 input_size))
4692 return false;
4693
4694 /* If we are producing relocateable output, the relocs were
4695 modified, and we now write them out. */
4696 if (finfo->info->relocateable && rel_size > 0)
4697 {
4698 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4699 return false;
4700 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4701 != rel_size)
4702 return false;
4703 *reloff_ptr += rel_size;
4704
4705 /* Assert that the relocs have not run into the symbols, and
4706 that if these are the text relocs they have not run into the
4707 data relocs. */
4708 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4709 && (reloff_ptr != &finfo->treloff
4710 || (*reloff_ptr
4711 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4712 }
4713
4714 return true;
4715}
4716
4717/* Get the section corresponding to a reloc index. */
4718
4719static INLINE asection *
4720aout_reloc_index_to_section (abfd, indx)
4721 bfd *abfd;
4722 int indx;
4723{
4724 switch (indx & N_TYPE)
4725 {
4726 case N_TEXT:
4727 return obj_textsec (abfd);
4728 case N_DATA:
4729 return obj_datasec (abfd);
4730 case N_BSS:
4731 return obj_bsssec (abfd);
4732 case N_ABS:
4733 case N_UNDF:
4734 return bfd_abs_section_ptr;
4735 default:
4736 abort ();
4737 }
7442e600
ILT		 4738 /*NOTREACHED*/
4739 return NULL;
252b5132
RH		 4740}
4741
4742/* Relocate an a.out section using standard a.out relocs. */
4743
4744static boolean
4745aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4746 rel_size, contents)
4747 struct aout_final_link_info *finfo;
4748 bfd *input_bfd;
4749 asection *input_section;
4750 struct reloc_std_external *relocs;
4751 bfd_size_type rel_size;
4752 bfd_byte *contents;
4753{
4754 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4755 bfd *, asection *,
4756 struct aout_link_hash_entry *,
4757 PTR, bfd_byte *, boolean *,
4758 bfd_vma *));
4759 bfd *output_bfd;
4760 boolean relocateable;
4761 struct external_nlist *syms;
4762 char *strings;
4763 struct aout_link_hash_entry **sym_hashes;
4764 int *symbol_map;
4765 bfd_size_type reloc_count;
4766 register struct reloc_std_external *rel;
4767 struct reloc_std_external *rel_end;
4768
4769 output_bfd = finfo->output_bfd;
4770 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4771
4772 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4773 BFD_ASSERT (input_bfd->xvec->header_byteorder
4774 == output_bfd->xvec->header_byteorder);
4775
4776 relocateable = finfo->info->relocateable;
4777 syms = obj_aout_external_syms (input_bfd);
4778 strings = obj_aout_external_strings (input_bfd);
4779 sym_hashes = obj_aout_sym_hashes (input_bfd);
4780 symbol_map = finfo->symbol_map;
4781
4782 reloc_count = rel_size / RELOC_STD_SIZE;
4783 rel = relocs;
4784 rel_end = rel + reloc_count;
4785 for (; rel < rel_end; rel++)
4786 {
4787 bfd_vma r_addr;
4788 int r_index;
4789 int r_extern;
4790 int r_pcrel;
4791 int r_baserel = 0;
4792 reloc_howto_type *howto;
4793 struct aout_link_hash_entry *h = NULL;
4794 bfd_vma relocation;
4795 bfd_reloc_status_type r;
4796
4797 r_addr = GET_SWORD (input_bfd, rel->r_address);
4798
4799#ifdef MY_reloc_howto
4800 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
0ef5a5bd 4801#else
252b5132
RH		 4802 {
4803 int r_jmptable;
4804 int r_relative;
4805 int r_length;
4806 unsigned int howto_idx;
4807
4808 if (bfd_header_big_endian (input_bfd))
4809 {
4810 r_index = ((rel->r_index[0] << 16)
4811 | (rel->r_index[1] << 8)
4812 | rel->r_index[2]);
4813 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4814 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4815 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4816 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4817 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4818 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4819 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4820 }
4821 else
4822 {
4823 r_index = ((rel->r_index[2] << 16)
4824 | (rel->r_index[1] << 8)
4825 | rel->r_index[0]);
4826 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4827 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4828 r_baserel = (0 != (rel->r_type[0]
4829 & RELOC_STD_BITS_BASEREL_LITTLE));
4830 r_jmptable= (0 != (rel->r_type[0]
4831 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4832 r_relative= (0 != (rel->r_type[0]
4833 & RELOC_STD_BITS_RELATIVE_LITTLE));
4834 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4835 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4836 }
4837
4838 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4839 + 16 * r_jmptable + 32 * r_relative);
4840 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4841 howto = howto_table_std + howto_idx;
4842 }
4843#endif
4844
4845 if (relocateable)
4846 {
4847 /* We are generating a relocateable output file, and must
4848 modify the reloc accordingly. */
4849 if (r_extern)
4850 {
4851 /* If we know the symbol this relocation is against,
4852 convert it into a relocation against a section. This
4853 is what the native linker does. */
4854 h = sym_hashes[r_index];
4855 if (h != (struct aout_link_hash_entry *) NULL
4856 && (h->root.type == bfd_link_hash_defined
4857 || h->root.type == bfd_link_hash_defweak))
4858 {
4859 asection *output_section;
4860
4861 /* Change the r_extern value. */
4862 if (bfd_header_big_endian (output_bfd))
4863 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4864 else
4865 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4866
4867 /* Compute a new r_index. */
4868 output_section = h->root.u.def.section->output_section;
4869 if (output_section == obj_textsec (output_bfd))
4870 r_index = N_TEXT;
4871 else if (output_section == obj_datasec (output_bfd))
4872 r_index = N_DATA;
4873 else if (output_section == obj_bsssec (output_bfd))
4874 r_index = N_BSS;
4875 else
4876 r_index = N_ABS;
4877
4878 /* Add the symbol value and the section VMA to the
4879 addend stored in the contents. */
4880 relocation = (h->root.u.def.value
4881 + output_section->vma
4882 + h->root.u.def.section->output_offset);
4883 }
4884 else
4885 {
4886 /* We must change r_index according to the symbol
4887 map. */
4888 r_index = symbol_map[r_index];
4889
4890 if (r_index == -1)
4891 {
4892 if (h != NULL)
4893 {
4894 /* We decided to strip this symbol, but it
4895 turns out that we can't. Note that we
4896 lose the other and desc information here.
4897 I don't think that will ever matter for a
4898 global symbol. */
4899 if (h->indx < 0)
4900 {
4901 h->indx = -2;
4902 h->written = false;
4903 if (! aout_link_write_other_symbol (h,
4904 (PTR) finfo))
4905 return false;
4906 }
4907 r_index = h->indx;
4908 }
4909 else
4910 {
4911 const char *name;
4912
4913 name = strings + GET_WORD (input_bfd,
4914 syms[r_index].e_strx);
4915 if (! ((*finfo->info->callbacks->unattached_reloc)
4916 (finfo->info, name, input_bfd, input_section,
4917 r_addr)))
4918 return false;
4919 r_index = 0;
4920 }
4921 }
4922
4923 relocation = 0;
4924 }
4925
4926 /* Write out the new r_index value. */
4927 if (bfd_header_big_endian (output_bfd))
4928 {
4929 rel->r_index[0] = r_index >> 16;
4930 rel->r_index[1] = r_index >> 8;
4931 rel->r_index[2] = r_index;
4932 }
4933 else
4934 {
4935 rel->r_index[2] = r_index >> 16;
4936 rel->r_index[1] = r_index >> 8;
4937 rel->r_index[0] = r_index;
4938 }
4939 }
4940 else
4941 {
4942 asection *section;
4943
4944 /* This is a relocation against a section. We must
4945 adjust by the amount that the section moved. */
4946 section = aout_reloc_index_to_section (input_bfd, r_index);
4947 relocation = (section->output_section->vma
4948 + section->output_offset
4949 - section->vma);
4950 }
4951
4952 /* Change the address of the relocation. */
4953 PUT_WORD (output_bfd,
4954 r_addr + input_section->output_offset,
4955 rel->r_address);
4956
4957 /* Adjust a PC relative relocation by removing the reference
4958 to the original address in the section and including the
4959 reference to the new address. */
4960 if (r_pcrel)
4961 relocation -= (input_section->output_section->vma
4962 + input_section->output_offset
4963 - input_section->vma);
4964
4965#ifdef MY_relocatable_reloc
4966 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4967#endif
4968
4969 if (relocation == 0)
4970 r = bfd_reloc_ok;
4971 else
4972 r = MY_relocate_contents (howto,
4973 input_bfd, relocation,
4974 contents + r_addr);
4975 }
4976 else
4977 {
4978 boolean hundef;
4979
4980 /* We are generating an executable, and must do a full
4981 relocation. */
4982 hundef = false;
4983
4984 if (r_extern)
4985 {
4986 h = sym_hashes[r_index];
4987
4988 if (h != (struct aout_link_hash_entry *) NULL
4989 && (h->root.type == bfd_link_hash_defined
4990 || h->root.type == bfd_link_hash_defweak))
4991 {
4992 relocation = (h->root.u.def.value
4993 + h->root.u.def.section->output_section->vma
4994 + h->root.u.def.section->output_offset);
4995 }
4996 else if (h != (struct aout_link_hash_entry *) NULL
4997 && h->root.type == bfd_link_hash_undefweak)
4998 relocation = 0;
4999 else
5000 {
5001 hundef = true;
5002 relocation = 0;
5003 }
5004 }
5005 else
5006 {
5007 asection *section;
5008
5009 section = aout_reloc_index_to_section (input_bfd, r_index);
5010 relocation = (section->output_section->vma
5011 + section->output_offset
5012 - section->vma);
5013 if (r_pcrel)
5014 relocation += input_section->vma;
5015 }
5016
5017 if (check_dynamic_reloc != NULL)
5018 {
5019 boolean skip;
5020
5021 if (! ((*check_dynamic_reloc)
5022 (finfo->info, input_bfd, input_section, h,
5023 (PTR) rel, contents, &skip, &relocation)))
5024 return false;
5025 if (skip)
5026 continue;
5027 }
5028
5029 /* Now warn if a global symbol is undefined. We could not
5030 do this earlier, because check_dynamic_reloc might want
5031 to skip this reloc. */
5032 if (hundef && ! finfo->info->shared && ! r_baserel)
5033 {
5034 const char *name;
5035
5036 if (h != NULL)
5037 name = h->root.root.string;
5038 else
5039 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5040 if (! ((*finfo->info->callbacks->undefined_symbol)
5cc7c785
L		 5041 (finfo->info, name, input_bfd, input_section,
5042 r_addr, true)))
252b5132
RH		 5043 return false;
5044 }
5045
5046 r = MY_final_link_relocate (howto,
5047 input_bfd, input_section,
5048 contents, r_addr, relocation,
5049 (bfd_vma) 0);
5050 }
5051
5052 if (r != bfd_reloc_ok)
5053 {
5054 switch (r)
5055 {
5056 default:
5057 case bfd_reloc_outofrange:
5058 abort ();
5059 case bfd_reloc_overflow:
5060 {
5061 const char *name;
5062
5063 if (h != NULL)
5064 name = h->root.root.string;
5065 else if (r_extern)
5066 name = strings + GET_WORD (input_bfd,
5067 syms[r_index].e_strx);
5068 else
5069 {
5070 asection *s;
5071
5072 s = aout_reloc_index_to_section (input_bfd, r_index);
5073 name = bfd_section_name (input_bfd, s);
5074 }
5075 if (! ((*finfo->info->callbacks->reloc_overflow)
5076 (finfo->info, name, howto->name,
5077 (bfd_vma) 0, input_bfd, input_section, r_addr)))
5078 return false;
5079 }
5080 break;
5081 }
5082 }
5083 }
5084
5085 return true;
5086}
5087
5088/* Relocate an a.out section using extended a.out relocs. */
5089
5090static boolean
5091aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5092 rel_size, contents)
5093 struct aout_final_link_info *finfo;
5094 bfd *input_bfd;
5095 asection *input_section;
5096 struct reloc_ext_external *relocs;
5097 bfd_size_type rel_size;
5098 bfd_byte *contents;
5099{
5100 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
5101 bfd *, asection *,
5102 struct aout_link_hash_entry *,
5103 PTR, bfd_byte *, boolean *,
5104 bfd_vma *));
5105 bfd *output_bfd;
5106 boolean relocateable;
5107 struct external_nlist *syms;
5108 char *strings;
5109 struct aout_link_hash_entry **sym_hashes;
5110 int *symbol_map;
5111 bfd_size_type reloc_count;
5112 register struct reloc_ext_external *rel;
5113 struct reloc_ext_external *rel_end;
5114
5115 output_bfd = finfo->output_bfd;
5116 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5117
5118 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5119 BFD_ASSERT (input_bfd->xvec->header_byteorder
5120 == output_bfd->xvec->header_byteorder);
5121
5122 relocateable = finfo->info->relocateable;
5123 syms = obj_aout_external_syms (input_bfd);
5124 strings = obj_aout_external_strings (input_bfd);
5125 sym_hashes = obj_aout_sym_hashes (input_bfd);
5126 symbol_map = finfo->symbol_map;
5127
5128 reloc_count = rel_size / RELOC_EXT_SIZE;
5129 rel = relocs;
5130 rel_end = rel + reloc_count;
5131 for (; rel < rel_end; rel++)
5132 {
5133 bfd_vma r_addr;
5134 int r_index;
5135 int r_extern;
5136 unsigned int r_type;
5137 bfd_vma r_addend;
5138 struct aout_link_hash_entry *h = NULL;
5139 asection *r_section = NULL;
5140 bfd_vma relocation;
5141
5142 r_addr = GET_SWORD (input_bfd, rel->r_address);
5143
5144 if (bfd_header_big_endian (input_bfd))
5145 {
5146 r_index = ((rel->r_index[0] << 16)
5147 | (rel->r_index[1] << 8)
5148 | rel->r_index[2]);
5149 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5150 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5151 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5152 }
5153 else
5154 {
5155 r_index = ((rel->r_index[2] << 16)
5156 | (rel->r_index[1] << 8)
5157 | rel->r_index[0]);
5158 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5159 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5160 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5161 }
5162
5163 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5164
5165 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5166
5167 if (relocateable)
5168 {
5169 /* We are generating a relocateable output file, and must
5170 modify the reloc accordingly. */
5171 if (r_extern
5172 || r_type == RELOC_BASE10
5173 || r_type == RELOC_BASE13
5174 || r_type == RELOC_BASE22)
5175 {
5176 /* If we know the symbol this relocation is against,
5177 convert it into a relocation against a section. This
5178 is what the native linker does. */
5179 if (r_type == RELOC_BASE10
5180 || r_type == RELOC_BASE13
5181 || r_type == RELOC_BASE22)
5182 h = NULL;
5183 else
5184 h = sym_hashes[r_index];
5185 if (h != (struct aout_link_hash_entry *) NULL
5186 && (h->root.type == bfd_link_hash_defined
5187 || h->root.type == bfd_link_hash_defweak))
5188 {
5189 asection *output_section;
5190
5191 /* Change the r_extern value. */
5192 if (bfd_header_big_endian (output_bfd))
5193 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5194 else
5195 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5196
5197 /* Compute a new r_index. */
5198 output_section = h->root.u.def.section->output_section;
5199 if (output_section == obj_textsec (output_bfd))
5200 r_index = N_TEXT;
5201 else if (output_section == obj_datasec (output_bfd))
5202 r_index = N_DATA;
5203 else if (output_section == obj_bsssec (output_bfd))
5204 r_index = N_BSS;
5205 else
5206 r_index = N_ABS;
5207
5208 /* Add the symbol value and the section VMA to the
5209 addend. */
5210 relocation = (h->root.u.def.value
5211 + output_section->vma
5212 + h->root.u.def.section->output_offset);
5213
5214 /* Now RELOCATION is the VMA of the final
5215 destination. If this is a PC relative reloc,
5216 then ADDEND is the negative of the source VMA.
5217 We want to set ADDEND to the difference between
5218 the destination VMA and the source VMA, which
5219 means we must adjust RELOCATION by the change in
5220 the source VMA. This is done below. */
5221 }
5222 else
5223 {
5224 /* We must change r_index according to the symbol
5225 map. */
5226 r_index = symbol_map[r_index];
5227
5228 if (r_index == -1)
5229 {
5230 if (h != NULL)
5231 {
5232 /* We decided to strip this symbol, but it
5233 turns out that we can't. Note that we
5234 lose the other and desc information here.
5235 I don't think that will ever matter for a
5236 global symbol. */
5237 if (h->indx < 0)
5238 {
5239 h->indx = -2;
5240 h->written = false;
5241 if (! aout_link_write_other_symbol (h,
5242 (PTR) finfo))
5243 return false;
5244 }
5245 r_index = h->indx;
5246 }
5247 else
5248 {
5249 const char *name;
5250
5251 name = strings + GET_WORD (input_bfd,
5252 syms[r_index].e_strx);
5253 if (! ((*finfo->info->callbacks->unattached_reloc)
5254 (finfo->info, name, input_bfd, input_section,
5255 r_addr)))
5256 return false;
5257 r_index = 0;
5258 }
5259 }
5260
5261 relocation = 0;
5262
5263 /* If this is a PC relative reloc, then the addend
5264 is the negative of the source VMA. We must
5265 adjust it by the change in the source VMA. This
5266 is done below. */
5267 }
5268
5269 /* Write out the new r_index value. */
5270 if (bfd_header_big_endian (output_bfd))
5271 {
5272 rel->r_index[0] = r_index >> 16;
5273 rel->r_index[1] = r_index >> 8;
5274 rel->r_index[2] = r_index;
5275 }
5276 else
5277 {
5278 rel->r_index[2] = r_index >> 16;
5279 rel->r_index[1] = r_index >> 8;
5280 rel->r_index[0] = r_index;
5281 }
5282 }
5283 else
5284 {
5285 /* This is a relocation against a section. We must
5286 adjust by the amount that the section moved. */
5287 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5288 relocation = (r_section->output_section->vma
5289 + r_section->output_offset
5290 - r_section->vma);
5291
5292 /* If this is a PC relative reloc, then the addend is
5293 the difference in VMA between the destination and the
5294 source. We have just adjusted for the change in VMA
5295 of the destination, so we must also adjust by the
5296 change in VMA of the source. This is done below. */
5297 }
5298
5299 /* As described above, we must always adjust a PC relative
5300 reloc by the change in VMA of the source. However, if
5301 pcrel_offset is set, then the addend does not include the
5302 location within the section, in which case we don't need
5303 to adjust anything. */
5304 if (howto_table_ext[r_type].pc_relative
5305 && ! howto_table_ext[r_type].pcrel_offset)
5306 relocation -= (input_section->output_section->vma
5307 + input_section->output_offset
5308 - input_section->vma);
5309
5310 /* Change the addend if necessary. */
5311 if (relocation != 0)
5312 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5313
5314 /* Change the address of the relocation. */
5315 PUT_WORD (output_bfd,
5316 r_addr + input_section->output_offset,
5317 rel->r_address);
5318 }
5319 else
5320 {
5321 boolean hundef;
5322 bfd_reloc_status_type r;
5323
5324 /* We are generating an executable, and must do a full
5325 relocation. */
5326 hundef = false;
5327
5328 if (r_extern)
5329 {
5330 h = sym_hashes[r_index];
5331
5332 if (h != (struct aout_link_hash_entry *) NULL
5333 && (h->root.type == bfd_link_hash_defined
5334 || h->root.type == bfd_link_hash_defweak))
5335 {
5336 relocation = (h->root.u.def.value
5337 + h->root.u.def.section->output_section->vma
5338 + h->root.u.def.section->output_offset);
5339 }
5340 else if (h != (struct aout_link_hash_entry *) NULL
5341 && h->root.type == bfd_link_hash_undefweak)
5342 relocation = 0;
5343 else
5344 {
5345 hundef = true;
5346 relocation = 0;
5347 }
5348 }
5349 else if (r_type == RELOC_BASE10
5350 || r_type == RELOC_BASE13
5351 || r_type == RELOC_BASE22)
5352 {
5353 struct external_nlist *sym;
5354 int type;
5355
5356 /* For base relative relocs, r_index is always an index
5357 into the symbol table, even if r_extern is 0. */
5358 sym = syms + r_index;
5359 type = bfd_h_get_8 (input_bfd, sym->e_type);
5360 if ((type & N_TYPE) == N_TEXT
5361 || type == N_WEAKT)
5362 r_section = obj_textsec (input_bfd);
5363 else if ((type & N_TYPE) == N_DATA
5364 || type == N_WEAKD)
5365 r_section = obj_datasec (input_bfd);
5366 else if ((type & N_TYPE) == N_BSS
5367 || type == N_WEAKB)
5368 r_section = obj_bsssec (input_bfd);
5369 else if ((type & N_TYPE) == N_ABS
5370 || type == N_WEAKA)
5371 r_section = bfd_abs_section_ptr;
5372 else
5373 abort ();
5374 relocation = (r_section->output_section->vma
5375 + r_section->output_offset
5376 + (GET_WORD (input_bfd, sym->e_value)
5377 - r_section->vma));
5378 }
5379 else
5380 {
5381 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5382
5383 /* If this is a PC relative reloc, then R_ADDEND is the
5384 difference between the two vmas, or
5385 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5386 where
5387 old_dest_sec == section->vma
5388 and
5389 old_src_sec == input_section->vma
5390 and
5391 old_src_off == r_addr
5392
5393 _bfd_final_link_relocate expects RELOCATION +
5394 R_ADDEND to be the VMA of the destination minus
5395 r_addr (the minus r_addr is because this relocation
5396 is not pcrel_offset, which is a bit confusing and
5397 should, perhaps, be changed), or
5398 new_dest_sec
5399 where
5400 new_dest_sec == output_section->vma + output_offset
5401 We arrange for this to happen by setting RELOCATION to
5402 new_dest_sec + old_src_sec - old_dest_sec
5403
5404 If this is not a PC relative reloc, then R_ADDEND is
5405 simply the VMA of the destination, so we set
5406 RELOCATION to the change in the destination VMA, or
5407 new_dest_sec - old_dest_sec
5408 */
5409 relocation = (r_section->output_section->vma
5410 + r_section->output_offset
5411 - r_section->vma);
5412 if (howto_table_ext[r_type].pc_relative)
5413 relocation += input_section->vma;
5414 }
5415
5416 if (check_dynamic_reloc != NULL)
5417 {
5418 boolean skip;
5419
5420 if (! ((*check_dynamic_reloc)
5421 (finfo->info, input_bfd, input_section, h,
5422 (PTR) rel, contents, &skip, &relocation)))
5423 return false;
5424 if (skip)
5425 continue;
5426 }
5427
5428 /* Now warn if a global symbol is undefined. We could not
5429 do this earlier, because check_dynamic_reloc might want
5430 to skip this reloc. */
5431 if (hundef
5432 && ! finfo->info->shared
5433 && r_type != RELOC_BASE10
5434 && r_type != RELOC_BASE13
5435 && r_type != RELOC_BASE22)
5436 {
5437 const char *name;
5438
5439 if (h != NULL)
5440 name = h->root.root.string;
5441 else
5442 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5443 if (! ((*finfo->info->callbacks->undefined_symbol)
5cc7c785
L		 5444 (finfo->info, name, input_bfd, input_section,
5445 r_addr, true)))
252b5132
RH		 5446 return false;
5447 }
5448
5449 if (r_type != RELOC_SPARC_REV32)
5450 r = MY_final_link_relocate (howto_table_ext + r_type,
5451 input_bfd, input_section,
5452 contents, r_addr, relocation,
5453 r_addend);
5454 else
5455 {
5456 bfd_vma x;
5457
5458 x = bfd_get_32 (input_bfd, contents + r_addr);
5459 x = x + relocation + r_addend;
5460 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5461 r = bfd_reloc_ok;
5462 }
5463
5464 if (r != bfd_reloc_ok)
5465 {
5466 switch (r)
5467 {
5468 default:
5469 case bfd_reloc_outofrange:
5470 abort ();
5471 case bfd_reloc_overflow:
5472 {
5473 const char *name;
5474
5475 if (h != NULL)
5476 name = h->root.root.string;
5477 else if (r_extern
5478 || r_type == RELOC_BASE10
5479 || r_type == RELOC_BASE13
5480 || r_type == RELOC_BASE22)
5481 name = strings + GET_WORD (input_bfd,
5482 syms[r_index].e_strx);
5483 else
5484 {
5485 asection *s;
5486
5487 s = aout_reloc_index_to_section (input_bfd, r_index);
5488 name = bfd_section_name (input_bfd, s);
5489 }
5490 if (! ((*finfo->info->callbacks->reloc_overflow)
5491 (finfo->info, name, howto_table_ext[r_type].name,
5492 r_addend, input_bfd, input_section, r_addr)))
5493 return false;
5494 }
5495 break;
5496 }
5497 }
5498 }
5499 }
5500
5501 return true;
5502}
5503
5504/* Handle a link order which is supposed to generate a reloc. */
5505
5506static boolean
5507aout_link_reloc_link_order (finfo, o, p)
5508 struct aout_final_link_info *finfo;
5509 asection *o;
5510 struct bfd_link_order *p;
5511{
5512 struct bfd_link_order_reloc *pr;
5513 int r_index;
5514 int r_extern;
5515 reloc_howto_type *howto;
7442e600 5516 file_ptr *reloff_ptr = NULL;
252b5132
RH		 5517 struct reloc_std_external srel;
5518 struct reloc_ext_external erel;
5519 PTR rel_ptr;
5520
5521 pr = p->u.reloc.p;
5522
5523 if (p->type == bfd_section_reloc_link_order)
5524 {
5525 r_extern = 0;
5526 if (bfd_is_abs_section (pr->u.section))
5527 r_index = N_ABS | N_EXT;
5528 else
5529 {
5530 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5531 r_index = pr->u.section->target_index;
5532 }
5533 }
5534 else
5535 {
5536 struct aout_link_hash_entry *h;
5537
5538 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5539 r_extern = 1;
5540 h = ((struct aout_link_hash_entry *)
5541 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5542 pr->u.name, false, false, true));
5543 if (h != (struct aout_link_hash_entry *) NULL
5544 && h->indx >= 0)
5545 r_index = h->indx;
5546 else if (h != NULL)
5547 {
5548 /* We decided to strip this symbol, but it turns out that we
5549 can't. Note that we lose the other and desc information
5550 here. I don't think that will ever matter for a global
5551 symbol. */
5552 h->indx = -2;
5553 h->written = false;
5554 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5555 return false;
5556 r_index = h->indx;
5557 }
5558 else
5559 {
5560 if (! ((*finfo->info->callbacks->unattached_reloc)
5561 (finfo->info, pr->u.name, (bfd *) NULL,
5562 (asection *) NULL, (bfd_vma) 0)))
5563 return false;
5564 r_index = 0;
5565 }
5566 }
5567
5568 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5569 if (howto == 0)
5570 {
5571 bfd_set_error (bfd_error_bad_value);
5572 return false;
5573 }
5574
5575 if (o == obj_textsec (finfo->output_bfd))
5576 reloff_ptr = &finfo->treloff;
5577 else if (o == obj_datasec (finfo->output_bfd))
5578 reloff_ptr = &finfo->dreloff;
5579 else
5580 abort ();
5581
5582 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5583 {
5584#ifdef MY_put_reloc
5585 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5586 &srel);
5587#else
5588 {
5589 int r_pcrel;
5590 int r_baserel;
5591 int r_jmptable;
5592 int r_relative;
5593 int r_length;
5594
5595 r_pcrel = howto->pc_relative;
5596 r_baserel = (howto->type & 8) != 0;
5597 r_jmptable = (howto->type & 16) != 0;
5598 r_relative = (howto->type & 32) != 0;
5599 r_length = howto->size;
5600
5601 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5602 if (bfd_header_big_endian (finfo->output_bfd))
5603 {
5604 srel.r_index[0] = r_index >> 16;
5605 srel.r_index[1] = r_index >> 8;
5606 srel.r_index[2] = r_index;
5607 srel.r_type[0] =
5608 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5609 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5610 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5611 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5612 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5613 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5614 }
5615 else
5616 {
5617 srel.r_index[2] = r_index >> 16;
5618 srel.r_index[1] = r_index >> 8;
5619 srel.r_index[0] = r_index;
5620 srel.r_type[0] =
5621 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5622 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5623 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5624 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5625 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5626 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5627 }
5628 }
5629#endif
5630 rel_ptr = (PTR) &srel;
5631
5632 /* We have to write the addend into the object file, since
5633 standard a.out relocs are in place. It would be more
5634 reliable if we had the current contents of the file here,
5635 rather than assuming zeroes, but we can't read the file since
5636 it was opened using bfd_openw. */
5637 if (pr->addend != 0)
5638 {
5639 bfd_size_type size;
5640 bfd_reloc_status_type r;
5641 bfd_byte *buf;
5642 boolean ok;
5643
5644 size = bfd_get_reloc_size (howto);
5645 buf = (bfd_byte *) bfd_zmalloc (size);
5646 if (buf == (bfd_byte *) NULL)
5647 return false;
5648 r = MY_relocate_contents (howto, finfo->output_bfd,
5649 pr->addend, buf);
5650 switch (r)
5651 {
5652 case bfd_reloc_ok:
5653 break;
5654 default:
5655 case bfd_reloc_outofrange:
5656 abort ();
5657 case bfd_reloc_overflow:
5658 if (! ((*finfo->info->callbacks->reloc_overflow)
5659 (finfo->info,
5660 (p->type == bfd_section_reloc_link_order
5661 ? bfd_section_name (finfo->output_bfd,
5662 pr->u.section)
5663 : pr->u.name),
5664 howto->name, pr->addend, (bfd *) NULL,
5665 (asection *) NULL, (bfd_vma) 0)))
5666 {
5667 free (buf);
5668 return false;
5669 }
5670 break;
5671 }
5672 ok = bfd_set_section_contents (finfo->output_bfd, o,
5673 (PTR) buf,
5674 (file_ptr) p->offset,
5675 size);
5676 free (buf);
5677 if (! ok)
5678 return false;
5679 }
5680 }
5681 else
5682 {
1642229e
HPN		 5683#ifdef MY_put_ext_reloc
5684 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5685 howto, &erel, pr->addend);
5686#else
252b5132
RH		 5687 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5688
5689 if (bfd_header_big_endian (finfo->output_bfd))
5690 {
5691 erel.r_index[0] = r_index >> 16;
5692 erel.r_index[1] = r_index >> 8;
5693 erel.r_index[2] = r_index;
5694 erel.r_type[0] =
5695 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5696 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5697 }
5698 else
5699 {
5700 erel.r_index[2] = r_index >> 16;
5701 erel.r_index[1] = r_index >> 8;
5702 erel.r_index[0] = r_index;
5703 erel.r_type[0] =
5704 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5705 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5706 }
5707
5708 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
1642229e 5709#endif /* MY_put_ext_reloc */
252b5132
RH		 5710
5711 rel_ptr = (PTR) &erel;
5712 }
5713
5714 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5715 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5716 obj_reloc_entry_size (finfo->output_bfd),
5717 finfo->output_bfd)
5718 != obj_reloc_entry_size (finfo->output_bfd)))
5719 return false;
5720
5721 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5722
5723 /* Assert that the relocs have not run into the symbols, and that n
5724 the text relocs have not run into the data relocs. */
5725 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5726 && (reloff_ptr != &finfo->treloff
5727 || (*reloff_ptr
5728 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
5729
5730 return true;
5731}
GDB Binutils - Deliverables
This page took 0.307916 seconds and 4 git commands to generate.