projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
* listing.c: Convert to ISO-C.
[deliverable/binutils-gdb.git] / bfd / aoutx.h
CommitLineData
252b5132 1/* BFD semi-generic back-end for a.out binaries.
7898deda 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
5ed6aba4 3 2001, 2002, 2003
252b5132
RH		 4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
6
f7c33884 7 This file is part of BFD, the Binary File Descriptor library.
252b5132 8
f7c33884
NC		 9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
252b5132 13
f7c33884
NC		 14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
252b5132 18
f7c33884
NC		 19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
252b5132
RH		 22
23/*
24SECTION
25 a.out backends
26
252b5132
RH		 27DESCRIPTION
28
29 BFD supports a number of different flavours of a.out format,
30 though the major differences are only the sizes of the
31 structures on disk, and the shape of the relocation
32 information.
33
34 The support is split into a basic support file @file{aoutx.h}
35 and other files which derive functions from the base. One
36 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
37 adds to the basic a.out functions support for sun3, sun4, 386
38 and 29k a.out files, to create a target jump vector for a
39 specific target.
40
41 This information is further split out into more specific files
42 for each machine, including @file{sunos.c} for sun3 and sun4,
43 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
44 demonstration of a 64 bit a.out format.
45
46 The base file @file{aoutx.h} defines general mechanisms for
47 reading and writing records to and from disk and various
48 other methods which BFD requires. It is included by
49 @file{aout32.c} and @file{aout64.c} to form the names
50 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51
52 As an example, this is what goes on to make the back end for a
53 sun4, from @file{aout32.c}:
54
55| #define ARCH_SIZE 32
56| #include "aoutx.h"
57
58 Which exports names:
59
60| ...
61| aout_32_canonicalize_reloc
62| aout_32_find_nearest_line
63| aout_32_get_lineno
64| aout_32_get_reloc_upper_bound
65| ...
66
67 from @file{sunos.c}:
68
69| #define TARGET_NAME "a.out-sunos-big"
70| #define VECNAME sunos_big_vec
71| #include "aoutf1.h"
72
73 requires all the names from @file{aout32.c}, and produces the jump vector
74
75| sunos_big_vec
76
77 The file @file{host-aout.c} is a special case. It is for a large set
78 of hosts that use ``more or less standard'' a.out files, and
79 for which cross-debugging is not interesting. It uses the
80 standard 32-bit a.out support routines, but determines the
81 file offsets and addresses of the text, data, and BSS
82 sections, the machine architecture and machine type, and the
83 entry point address, in a host-dependent manner. Once these
84 values have been determined, generic code is used to handle
85 the object file.
86
87 When porting it to run on a new system, you must supply:
88
89| HOST_PAGE_SIZE
90| HOST_SEGMENT_SIZE
91| HOST_MACHINE_ARCH (optional)
92| HOST_MACHINE_MACHINE (optional)
93| HOST_TEXT_START_ADDR
94| HOST_STACK_END_ADDR
95
96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
97 values, plus the structures and macros defined in @file{a.out.h} on
98 your host system, will produce a BFD target that will access
99 ordinary a.out files on your host. To configure a new machine
100 to use @file{host-aout.c}, specify:
101
102| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
103| TDEPFILES= host-aout.o trad-core.o
104
105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 to use the
107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
5ed6aba4 108 configuration is selected. */
252b5132
RH		 109
110/* Some assumptions:
111 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
112 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 get set on input.
114 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
115 * Any BFD with both flags clear is OMAGIC.
116 (Just want to make these explicit, so the conditions tested in this
117 file make sense if you're more familiar with a.out than with BFD.) */
118
119#define KEEPIT udata.i
120
252b5132
RH		 121#include "bfd.h"
122#include "sysdep.h"
3882b010 123#include "safe-ctype.h"
252b5132
RH		 124#include "bfdlink.h"
125
126#include "libaout.h"
127#include "libbfd.h"
128#include "aout/aout64.h"
129#include "aout/stab_gnu.h"
130#include "aout/ar.h"
131
b34976b6
AM		 132static bfd_boolean aout_get_external_symbols
133 PARAMS ((bfd *));
134static bfd_boolean translate_from_native_sym_flags
252b5132 135 PARAMS ((bfd *, aout_symbol_type *));
b34976b6 136static bfd_boolean translate_to_native_sym_flags
252b5132 137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
b34976b6
AM		 138static void adjust_o_magic
139 PARAMS ((bfd *, struct internal_exec *));
140static void adjust_z_magic
141 PARAMS ((bfd *, struct internal_exec *));
142static void adjust_n_magic
143 PARAMS ((bfd *, struct internal_exec *));
923f08ff
AM		 144reloc_howto_type * NAME(aout,reloc_type_lookup)
145 PARAMS ((bfd *, bfd_reloc_code_real_type));
252b5132
RH		 146
147/*
148SUBSECTION
149 Relocations
150
151DESCRIPTION
152 The file @file{aoutx.h} provides for both the @emph{standard}
153 and @emph{extended} forms of a.out relocation records.
154
155 The standard records contain only an
156 address, a symbol index, and a type field. The extended records
157 (used on 29ks and sparcs) also have a full integer for an
5ed6aba4 158 addend. */
252b5132 159
252b5132
RH		 160#ifndef CTOR_TABLE_RELOC_HOWTO
161#define CTOR_TABLE_RELOC_IDX 2
923f08ff
AM		 162#define CTOR_TABLE_RELOC_HOWTO(BFD) \
163 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
164 ? howto_table_ext : howto_table_std) \
165 + CTOR_TABLE_RELOC_IDX)
252b5132
RH		 166#endif
167
168#ifndef MY_swap_std_reloc_in
169#define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
170#endif
171
1642229e
HPN		 172#ifndef MY_swap_ext_reloc_in
173#define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in)
174#endif
175
252b5132
RH		 176#ifndef MY_swap_std_reloc_out
177#define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
178#endif
179
1642229e
HPN		 180#ifndef MY_swap_ext_reloc_out
181#define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out)
182#endif
183
252b5132
RH		 184#ifndef MY_final_link_relocate
185#define MY_final_link_relocate _bfd_final_link_relocate
186#endif
187
188#ifndef MY_relocate_contents
189#define MY_relocate_contents _bfd_relocate_contents
190#endif
191
192#define howto_table_ext NAME(aout,ext_howto_table)
193#define howto_table_std NAME(aout,std_howto_table)
194
195reloc_howto_type howto_table_ext[] =
196{
f7c33884 197 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
b34976b6
AM		 198 HOWTO(RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", FALSE, 0,0x000000ff, FALSE),
199 HOWTO(RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", FALSE, 0,0x0000ffff, FALSE),
200 HOWTO(RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", FALSE, 0,0xffffffff, FALSE),
201 HOWTO(RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed,0,"DISP8", FALSE, 0,0x000000ff, FALSE),
202 HOWTO(RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed,0,"DISP16", FALSE, 0,0x0000ffff, FALSE),
203 HOWTO(RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed,0,"DISP32", FALSE, 0,0xffffffff, FALSE),
204 HOWTO(RELOC_WDISP30,2, 2, 30, TRUE, 0, complain_overflow_signed,0,"WDISP30", FALSE, 0,0x3fffffff, FALSE),
205 HOWTO(RELOC_WDISP22,2, 2, 22, TRUE, 0, complain_overflow_signed,0,"WDISP22", FALSE, 0,0x003fffff, FALSE),
206 HOWTO(RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"HI22", FALSE, 0,0x003fffff, FALSE),
207 HOWTO(RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"22", FALSE, 0,0x003fffff, FALSE),
208 HOWTO(RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield,0,"13", FALSE, 0,0x00001fff, FALSE),
209 HOWTO(RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont,0,"LO10", FALSE, 0,0x000003ff, FALSE),
210 HOWTO(RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"SFA_BASE", FALSE, 0,0xffffffff, FALSE),
211 HOWTO(RELOC_SFA_OFF13,0,2, 32, FALSE, 0, complain_overflow_bitfield,0,"SFA_OFF13",FALSE, 0,0xffffffff, FALSE),
212 HOWTO(RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont,0,"BASE10", FALSE, 0,0x000003ff, FALSE),
213 HOWTO(RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed,0,"BASE13", FALSE, 0,0x00001fff, FALSE),
214 HOWTO(RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield,0,"BASE22", FALSE, 0,0x003fffff, FALSE),
215 HOWTO(RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont,0,"PC10", FALSE, 0,0x000003ff, TRUE),
216 HOWTO(RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed,0,"PC22", FALSE, 0,0x003fffff, TRUE),
217 HOWTO(RELOC_JMP_TBL,2, 2, 30, TRUE, 0, complain_overflow_signed,0,"JMP_TBL", FALSE, 0,0x3fffffff, FALSE),
218 HOWTO(RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"SEGOFF16", FALSE, 0,0x00000000, FALSE),
219 HOWTO(RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GLOB_DAT", FALSE, 0,0x00000000, FALSE),
220 HOWTO(RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_SLOT", FALSE, 0,0x00000000, FALSE),
221 HOWTO(RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
222 HOWTO(0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE", FALSE,0,0x00000000,TRUE),
223 HOWTO(0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE", FALSE,0,0x00000000,TRUE),
252b5132 224#define RELOC_SPARC_REV32 RELOC_WDISP19
b34976b6 225 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont,0,"R_SPARC_REV32", FALSE, 0,0xffffffff, FALSE),
252b5132
RH		 226};
227
228/* Convert standard reloc records to "arelent" format (incl byte swap). */
229
5ed6aba4
NC		 230reloc_howto_type howto_table_std[] =
231{
f7c33884 232 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
b34976b6
AM		 233HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
234HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
235HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
236HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
237HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
238HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
239HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
240HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
241HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
242HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
243HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
5f771d47
ILT		 244EMPTY_HOWTO (-1),
245EMPTY_HOWTO (-1),
246EMPTY_HOWTO (-1),
247EMPTY_HOWTO (-1),
248EMPTY_HOWTO (-1),
b34976b6 249 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
5f771d47
ILT		 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),
259EMPTY_HOWTO (-1),
260EMPTY_HOWTO (-1),
261EMPTY_HOWTO (-1),
262EMPTY_HOWTO (-1),
263EMPTY_HOWTO (-1),
264EMPTY_HOWTO (-1),
b34976b6 265 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
5f771d47
ILT		 266EMPTY_HOWTO (-1),
267EMPTY_HOWTO (-1),
268EMPTY_HOWTO (-1),
269EMPTY_HOWTO (-1),
270EMPTY_HOWTO (-1),
271EMPTY_HOWTO (-1),
272EMPTY_HOWTO (-1),
b34976b6 273 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
252b5132
RH		 274};
275
923f08ff 276#define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
252b5132
RH		 277
278reloc_howto_type *
279NAME(aout,reloc_type_lookup) (abfd,code)
280 bfd *abfd;
281 bfd_reloc_code_real_type code;
282{
923f08ff
AM		 283#define EXT(i, j) case i: return &howto_table_ext[j]
284#define STD(i, j) case i: return &howto_table_std[j]
252b5132 285 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
f7c33884 286
252b5132
RH		 287 if (code == BFD_RELOC_CTOR)
288 switch (bfd_get_arch_info (abfd)->bits_per_address)
289 {
290 case 32:
291 code = BFD_RELOC_32;
292 break;
293 case 64:
294 code = BFD_RELOC_64;
295 break;
296 }
f7c33884 297
252b5132
RH		 298 if (ext)
299 switch (code)
300 {
1642229e
HPN		 301 EXT (BFD_RELOC_8, 0);
302 EXT (BFD_RELOC_16, 1);
252b5132
RH		 303 EXT (BFD_RELOC_32, 2);
304 EXT (BFD_RELOC_HI22, 8);
305 EXT (BFD_RELOC_LO10, 11);
306 EXT (BFD_RELOC_32_PCREL_S2, 6);
307 EXT (BFD_RELOC_SPARC_WDISP22, 7);
308 EXT (BFD_RELOC_SPARC13, 10);
309 EXT (BFD_RELOC_SPARC_GOT10, 14);
310 EXT (BFD_RELOC_SPARC_BASE13, 15);
311 EXT (BFD_RELOC_SPARC_GOT13, 15);
312 EXT (BFD_RELOC_SPARC_GOT22, 16);
313 EXT (BFD_RELOC_SPARC_PC10, 17);
314 EXT (BFD_RELOC_SPARC_PC22, 18);
315 EXT (BFD_RELOC_SPARC_WPLT30, 19);
316 EXT (BFD_RELOC_SPARC_REV32, 26);
317 default: return (reloc_howto_type *) NULL;
318 }
319 else
f7c33884 320 /* std relocs. */
252b5132
RH		 321 switch (code)
322 {
2846975a 323 STD (BFD_RELOC_8, 0);
252b5132
RH		 324 STD (BFD_RELOC_16, 1);
325 STD (BFD_RELOC_32, 2);
326 STD (BFD_RELOC_8_PCREL, 4);
327 STD (BFD_RELOC_16_PCREL, 5);
328 STD (BFD_RELOC_32_PCREL, 6);
329 STD (BFD_RELOC_16_BASEREL, 9);
330 STD (BFD_RELOC_32_BASEREL, 10);
331 default: return (reloc_howto_type *) NULL;
332 }
333}
334
335/*
336SUBSECTION
337 Internal entry points
338
339DESCRIPTION
340 @file{aoutx.h} exports several routines for accessing the
341 contents of an a.out file, which are gathered and exported in
342 turn by various format specific files (eg sunos.c).
343
344*/
345
346/*
347FUNCTION
348 aout_@var{size}_swap_exec_header_in
349
350SYNOPSIS
351 void aout_@var{size}_swap_exec_header_in,
352 (bfd *abfd,
353 struct external_exec *raw_bytes,
354 struct internal_exec *execp);
355
356DESCRIPTION
357 Swap the information in an executable header @var{raw_bytes} taken
358 from a raw byte stream memory image into the internal exec header
359 structure @var{execp}.
360*/
361
362#ifndef NAME_swap_exec_header_in
363void
364NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
365 bfd *abfd;
366 struct external_exec *raw_bytes;
367 struct internal_exec *execp;
368{
369 struct external_exec *bytes = (struct external_exec *)raw_bytes;
370
371 /* The internal_exec structure has some fields that are unused in this
372 configuration (IE for i960), so ensure that all such uninitialized
373 fields are zero'd out. There are places where two of these structs
0ef5a5bd 374 are memcmp'd, and thus the contents do matter. */
252b5132
RH		 375 memset ((PTR) execp, 0, sizeof (struct internal_exec));
376 /* Now fill in fields in the execp, from the bytes in the raw data. */
dc810e39 377 execp->a_info = H_GET_32 (abfd, bytes->e_info);
252b5132
RH		 378 execp->a_text = GET_WORD (abfd, bytes->e_text);
379 execp->a_data = GET_WORD (abfd, bytes->e_data);
380 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
381 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
382 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
383 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
384 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
385}
386#define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
387#endif
388
389/*
390FUNCTION
391 aout_@var{size}_swap_exec_header_out
392
393SYNOPSIS
394 void aout_@var{size}_swap_exec_header_out
395 (bfd *abfd,
396 struct internal_exec *execp,
397 struct external_exec *raw_bytes);
398
399DESCRIPTION
400 Swap the information in an internal exec header structure
401 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
402*/
403void
404NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
405 bfd *abfd;
406 struct internal_exec *execp;
407 struct external_exec *raw_bytes;
408{
409 struct external_exec *bytes = (struct external_exec *)raw_bytes;
410
0ef5a5bd 411 /* Now fill in fields in the raw data, from the fields in the exec struct. */
dc810e39 412 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
252b5132
RH		 413 PUT_WORD (abfd, execp->a_text , bytes->e_text);
414 PUT_WORD (abfd, execp->a_data , bytes->e_data);
415 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
416 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
417 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
418 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
419 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
420}
421
422/* Make all the section for an a.out file. */
423
b34976b6 424bfd_boolean
252b5132
RH		 425NAME(aout,make_sections) (abfd)
426 bfd *abfd;
427{
428 if (obj_textsec (abfd) == (asection *) NULL
429 && bfd_make_section (abfd, ".text") == (asection *) NULL)
b34976b6 430 return FALSE;
252b5132
RH		 431 if (obj_datasec (abfd) == (asection *) NULL
432 && bfd_make_section (abfd, ".data") == (asection *) NULL)
b34976b6 433 return FALSE;
252b5132
RH		 434 if (obj_bsssec (abfd) == (asection *) NULL
435 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
b34976b6
AM		 436 return FALSE;
437 return TRUE;
252b5132
RH		 438}
439
440/*
441FUNCTION
442 aout_@var{size}_some_aout_object_p
443
444SYNOPSIS
445 const bfd_target *aout_@var{size}_some_aout_object_p
446 (bfd *abfd,
beb0d161 447 const bfd_target *(*callback_to_real_object_p) ());
252b5132
RH		 448
449DESCRIPTION
450 Some a.out variant thinks that the file open in @var{abfd}
451 checking is an a.out file. Do some more checking, and set up
452 for access if it really is. Call back to the calling
453 environment's "finish up" function just before returning, to
454 handle any last-minute setup.
455*/
456
457const bfd_target *
458NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
459 bfd *abfd;
460 struct internal_exec *execp;
461 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
462{
463 struct aout_data_struct *rawptr, *oldrawptr;
464 const bfd_target *result;
dc810e39 465 bfd_size_type amt = sizeof (struct aout_data_struct);
252b5132 466
dc810e39 467 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
252b5132
RH		 468 if (rawptr == NULL)
469 return 0;
470
471 oldrawptr = abfd->tdata.aout_data;
472 abfd->tdata.aout_data = rawptr;
473
474 /* Copy the contents of the old tdata struct.
475 In particular, we want the subformat, since for hpux it was set in
476 hp300hpux.c:swap_exec_header_in and will be used in
477 hp300hpux.c:callback. */
478 if (oldrawptr != NULL)
479 *abfd->tdata.aout_data = *oldrawptr;
480
481 abfd->tdata.aout_data->a.hdr = &rawptr->e;
f7c33884
NC		 482 /* Copy in the internal_exec struct. */
483 *(abfd->tdata.aout_data->a.hdr) = *execp;
252b5132
RH		 484 execp = abfd->tdata.aout_data->a.hdr;
485
f7c33884 486 /* Set the file flags. */
252b5132
RH		 487 abfd->flags = BFD_NO_FLAGS;
488 if (execp->a_drsize || execp->a_trsize)
489 abfd->flags |= HAS_RELOC;
f7c33884 490 /* Setting of EXEC_P has been deferred to the bottom of this function. */
252b5132
RH		 491 if (execp->a_syms)
492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
923f08ff 493 if (N_DYNAMIC (*execp))
252b5132
RH		 494 abfd->flags |= DYNAMIC;
495
496 if (N_MAGIC (*execp) == ZMAGIC)
497 {
498 abfd->flags |= D_PAGED | WP_TEXT;
499 adata (abfd).magic = z_magic;
500 }
501 else if (N_MAGIC (*execp) == QMAGIC)
502 {
503 abfd->flags |= D_PAGED | WP_TEXT;
504 adata (abfd).magic = z_magic;
505 adata (abfd).subformat = q_magic_format;
506 }
507 else if (N_MAGIC (*execp) == NMAGIC)
508 {
509 abfd->flags |= WP_TEXT;
510 adata (abfd).magic = n_magic;
511 }
512 else if (N_MAGIC (*execp) == OMAGIC
513 || N_MAGIC (*execp) == BMAGIC)
514 adata (abfd).magic = o_magic;
515 else
516 {
517 /* Should have been checked with N_BADMAG before this routine
518 was called. */
519 abort ();
520 }
521
522 bfd_get_start_address (abfd) = execp->a_entry;
523
524 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
525 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
526
527 /* The default relocation entry size is that of traditional V7 Unix. */
528 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
529
0ef5a5bd 530 /* The default symbol entry size is that of traditional Unix. */
252b5132
RH		 531 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
532
533#ifdef USE_MMAP
534 bfd_init_window (&obj_aout_sym_window (abfd));
535 bfd_init_window (&obj_aout_string_window (abfd));
536#endif
537 obj_aout_external_syms (abfd) = NULL;
538 obj_aout_external_strings (abfd) = NULL;
539 obj_aout_sym_hashes (abfd) = NULL;
540
541 if (! NAME(aout,make_sections) (abfd))
487e54f2 542 goto error_ret;
252b5132
RH		 543
544 obj_datasec (abfd)->_raw_size = execp->a_data;
545 obj_bsssec (abfd)->_raw_size = execp->a_bss;
546
547 obj_textsec (abfd)->flags =
548 (execp->a_trsize != 0
549 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
550 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
551 obj_datasec (abfd)->flags =
552 (execp->a_drsize != 0
553 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
554 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
555 obj_bsssec (abfd)->flags = SEC_ALLOC;
556
557#ifdef THIS_IS_ONLY_DOCUMENTATION
558 /* The common code can't fill in these things because they depend
559 on either the start address of the text segment, the rounding
560 up of virtual addresses between segments, or the starting file
561 position of the text segment -- all of which varies among different
562 versions of a.out. */
563
564 /* Call back to the format-dependent code to fill in the rest of the
565 fields and do any further cleanup. Things that should be filled
566 in by the callback: */
567
568 struct exec *execp = exec_hdr (abfd);
569
923f08ff
AM		 570 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
571 obj_textsec (abfd)->raw_size = N_TXTSIZE (*execp);
f7c33884 572 /* Data and bss are already filled in since they're so standard. */
252b5132 573
f7c33884 574 /* The virtual memory addresses of the sections. */
923f08ff
AM		 575 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
576 obj_datasec (abfd)->vma = N_DATADDR (*execp);
577 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
252b5132 578
f7c33884 579 /* The file offsets of the sections. */
923f08ff
AM		 580 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
581 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
252b5132 582
f7c33884 583 /* The file offsets of the relocation info. */
923f08ff
AM		 584 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
585 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
252b5132
RH		 586
587 /* The file offsets of the string table and symbol table. */
588 obj_str_filepos (abfd) = N_STROFF (*execp);
589 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
590
591 /* Determine the architecture and machine type of the object file. */
923f08ff
AM		 592 switch (N_MACHTYPE (*exec_hdr (abfd)))
593 {
594 default:
595 abfd->obj_arch = bfd_arch_obscure;
596 break;
597 }
252b5132 598
923f08ff
AM		 599 adata (abfd)->page_size = TARGET_PAGE_SIZE;
600 adata (abfd)->segment_size = SEGMENT_SIZE;
601 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
252b5132
RH		 602
603 return abfd->xvec;
604
605 /* The architecture is encoded in various ways in various a.out variants,
606 or is not encoded at all in some of them. The relocation size depends
607 on the architecture and the a.out variant. Finally, the return value
608 is the bfd_target vector in use. If an error occurs, return zero and
609 set bfd_error to the appropriate error code.
610
611 Formats such as b.out, which have additional fields in the a.out
612 header, should cope with them in this callback as well. */
613#endif /* DOCUMENTATION */
614
beb0d161 615 result = (*callback_to_real_object_p) (abfd);
252b5132
RH		 616
617 /* Now that the segment addresses have been worked out, take a better
618 guess at whether the file is executable. If the entry point
619 is within the text segment, assume it is. (This makes files
620 executable even if their entry point address is 0, as long as
621 their text starts at zero.).
622
623 This test had to be changed to deal with systems where the text segment
624 runs at a different location than the default. The problem is that the
625 entry address can appear to be outside the text segment, thus causing an
626 erroneous conclusion that the file isn't executable.
627
628 To fix this, we now accept any non-zero entry point as an indication of
629 executability. This will work most of the time, since only the linker
0ef5a5bd 630 sets the entry point, and that is likely to be non-zero for most systems. */
252b5132
RH		 631
632 if (execp->a_entry != 0
923f08ff
AM		 633 || (execp->a_entry >= obj_textsec (abfd)->vma
634 && execp->a_entry < (obj_textsec (abfd)->vma
635 + obj_textsec (abfd)->_raw_size)))
252b5132
RH		 636 abfd->flags |= EXEC_P;
637#ifdef STAT_FOR_EXEC
638 else
639 {
640 struct stat stat_buf;
641
642 /* The original heuristic doesn't work in some important cases.
643 The a.out file has no information about the text start
644 address. For files (like kernels) linked to non-standard
645 addresses (ld -Ttext nnn) the entry point may not be between
646 the default text start (obj_textsec(abfd)->vma) and
647 (obj_textsec(abfd)->vma) + text size. This is not just a mach
648 issue. Many kernels are loaded at non standard addresses. */
649 if (abfd->iostream != NULL
650 && (abfd->flags & BFD_IN_MEMORY) == 0
923f08ff 651 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
252b5132
RH		 652 && ((stat_buf.st_mode & 0111) != 0))
653 abfd->flags |= EXEC_P;
654 }
655#endif /* STAT_FOR_EXEC */
656
657 if (result)
658 {
659#if 0 /* These should be set correctly anyways. */
660 abfd->sections = obj_textsec (abfd);
661 obj_textsec (abfd)->next = obj_datasec (abfd);
662 obj_datasec (abfd)->next = obj_bsssec (abfd);
663#endif
487e54f2 664 return result;
252b5132 665 }
487e54f2
AM		 666
667 error_ret:
668 bfd_release (abfd, rawptr);
669 abfd->tdata.aout_data = oldrawptr;
670 return NULL;
252b5132
RH		 671}
672
673/*
674FUNCTION
675 aout_@var{size}_mkobject
676
677SYNOPSIS
b34976b6 678 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
252b5132
RH		 679
680DESCRIPTION
681 Initialize BFD @var{abfd} for use with a.out files.
682*/
683
b34976b6 684bfd_boolean
252b5132
RH		 685NAME(aout,mkobject) (abfd)
686 bfd *abfd;
687{
dc810e39
AM		 688 struct aout_data_struct *rawptr;
689 bfd_size_type amt = sizeof (struct aout_data_struct);
252b5132
RH		 690
691 bfd_set_error (bfd_error_system_call);
692
dc810e39 693 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
252b5132 694 if (rawptr == NULL)
b34976b6 695 return FALSE;
252b5132
RH		 696
697 abfd->tdata.aout_data = rawptr;
698 exec_hdr (abfd) = &(rawptr->e);
699
dc810e39
AM		 700 obj_textsec (abfd) = (asection *) NULL;
701 obj_datasec (abfd) = (asection *) NULL;
702 obj_bsssec (abfd) = (asection *) NULL;
252b5132 703
b34976b6 704 return TRUE;
252b5132
RH		 705}
706
252b5132
RH		 707/*
708FUNCTION
709 aout_@var{size}_machine_type
710
711SYNOPSIS
712 enum machine_type aout_@var{size}_machine_type
713 (enum bfd_architecture arch,
714 unsigned long machine));
715
716DESCRIPTION
717 Keep track of machine architecture and machine type for
718 a.out's. Return the <<machine_type>> for a particular
719 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
720 and machine can't be represented in a.out format.
721
722 If the architecture is understood, machine type 0 (default)
723 is always understood.
724*/
725
726enum machine_type
727NAME(aout,machine_type) (arch, machine, unknown)
728 enum bfd_architecture arch;
729 unsigned long machine;
b34976b6 730 bfd_boolean *unknown;
252b5132
RH		 731{
732 enum machine_type arch_flags;
733
734 arch_flags = M_UNKNOWN;
b34976b6 735 *unknown = TRUE;
252b5132 736
923f08ff
AM		 737 switch (arch)
738 {
739 case bfd_arch_sparc:
740 if (machine == 0
741 || machine == bfd_mach_sparc
742 || machine == bfd_mach_sparc_sparclite
743 || machine == bfd_mach_sparc_sparclite_le
744 || machine == bfd_mach_sparc_v9)
745 arch_flags = M_SPARC;
746 else if (machine == bfd_mach_sparc_sparclet)
747 arch_flags = M_SPARCLET;
748 break;
749
750 case bfd_arch_m68k:
751 switch (machine)
752 {
753 case 0: arch_flags = M_68010; break;
b34976b6 754 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
923f08ff
AM		 755 case bfd_mach_m68010: arch_flags = M_68010; break;
756 case bfd_mach_m68020: arch_flags = M_68020; break;
757 default: arch_flags = M_UNKNOWN; break;
758 }
252b5132 759 break;
923f08ff
AM		 760
761 case bfd_arch_i386:
3b77b1d5
AM		 762 if (machine == 0
763 || machine == bfd_mach_i386_i386
764 || machine == bfd_mach_i386_i386_intel_syntax)
923f08ff 765 arch_flags = M_386;
252b5132 766 break;
923f08ff
AM		 767
768 case bfd_arch_a29k:
769 if (machine == 0)
770 arch_flags = M_29K;
252b5132 771 break;
923f08ff
AM		 772
773 case bfd_arch_arm:
774 if (machine == 0)
775 arch_flags = M_ARM;
252b5132 776 break;
252b5132 777
923f08ff
AM		 778 case bfd_arch_mips:
779 switch (machine)
780 {
781 case 0:
782 case bfd_mach_mips3000:
783 case bfd_mach_mips3900:
784 arch_flags = M_MIPS1;
785 break;
786 case bfd_mach_mips6000:
787 arch_flags = M_MIPS2;
788 break;
789 case bfd_mach_mips4000:
790 case bfd_mach_mips4010:
791 case bfd_mach_mips4100:
792 case bfd_mach_mips4300:
793 case bfd_mach_mips4400:
794 case bfd_mach_mips4600:
795 case bfd_mach_mips4650:
796 case bfd_mach_mips8000:
797 case bfd_mach_mips10000:
798 case bfd_mach_mips12000:
799 case bfd_mach_mips16:
800 case bfd_mach_mipsisa32:
af7ee8bf 801 case bfd_mach_mipsisa32r2:
923f08ff
AM		 802 case bfd_mach_mips5:
803 case bfd_mach_mipsisa64:
5f74bc13 804 case bfd_mach_mipsisa64r2:
923f08ff
AM		 805 case bfd_mach_mips_sb1:
806 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
807 arch_flags = M_MIPS2;
808 break;
809 default:
810 arch_flags = M_UNKNOWN;
811 break;
812 }
813 break;
814
815 case bfd_arch_ns32k:
816 switch (machine)
817 {
818 case 0: arch_flags = M_NS32532; break;
819 case 32032: arch_flags = M_NS32032; break;
820 case 32532: arch_flags = M_NS32532; break;
821 default: arch_flags = M_UNKNOWN; break;
822 }
823 break;
252b5132 824
923f08ff 825 case bfd_arch_vax:
b34976b6 826 *unknown = FALSE;
923f08ff 827 break;
06c15ad7 828
923f08ff
AM		 829 case bfd_arch_cris:
830 if (machine == 0 || machine == 255)
831 arch_flags = M_CRIS;
832 break;
833
834 default:
835 arch_flags = M_UNKNOWN;
836 }
252b5132
RH		 837
838 if (arch_flags != M_UNKNOWN)
b34976b6 839 *unknown = FALSE;
252b5132
RH		 840
841 return arch_flags;
842}
843
252b5132
RH		 844/*
845FUNCTION
846 aout_@var{size}_set_arch_mach
847
848SYNOPSIS
b34976b6 849 bfd_boolean aout_@var{size}_set_arch_mach,
252b5132
RH		 850 (bfd *,
851 enum bfd_architecture arch,
852 unsigned long machine));
853
854DESCRIPTION
855 Set the architecture and the machine of the BFD @var{abfd} to the
856 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
857 can support the architecture required.
858*/
859
b34976b6 860bfd_boolean
252b5132
RH		 861NAME(aout,set_arch_mach) (abfd, arch, machine)
862 bfd *abfd;
863 enum bfd_architecture arch;
864 unsigned long machine;
865{
866 if (! bfd_default_set_arch_mach (abfd, arch, machine))
b34976b6 867 return FALSE;
252b5132
RH		 868
869 if (arch != bfd_arch_unknown)
870 {
b34976b6 871 bfd_boolean unknown;
252b5132
RH		 872
873 NAME(aout,machine_type) (arch, machine, &unknown);
874 if (unknown)
b34976b6 875 return FALSE;
252b5132
RH		 876 }
877
f7c33884 878 /* Determine the size of a relocation entry. */
923f08ff
AM		 879 switch (arch)
880 {
881 case bfd_arch_sparc:
882 case bfd_arch_a29k:
883 case bfd_arch_mips:
884 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
885 break;
886 default:
887 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
888 break;
889 }
252b5132 890
923f08ff 891 return (*aout_backend_info (abfd)->set_sizes) (abfd);
252b5132
RH		 892}
893
894static void
895adjust_o_magic (abfd, execp)
896 bfd *abfd;
897 struct internal_exec *execp;
898{
899 file_ptr pos = adata (abfd).exec_bytes_size;
900 bfd_vma vma = 0;
901 int pad = 0;
902
903 /* Text. */
923f08ff
AM		 904 obj_textsec (abfd)->filepos = pos;
905 if (!obj_textsec (abfd)->user_set_vma)
906 obj_textsec (abfd)->vma = vma;
252b5132 907 else
923f08ff 908 vma = obj_textsec (abfd)->vma;
252b5132 909
923f08ff
AM		 910 pos += obj_textsec (abfd)->_raw_size;
911 vma += obj_textsec (abfd)->_raw_size;
252b5132
RH		 912
913 /* Data. */
923f08ff 914 if (!obj_datasec (abfd)->user_set_vma)
252b5132 915 {
f7c33884 916#if 0 /* ?? Does alignment in the file image really matter? */
923f08ff 917 pad = align_power (vma, obj_datasec (abfd)->alignment_power) - vma;
252b5132 918#endif
923f08ff 919 obj_textsec (abfd)->_raw_size += pad;
252b5132
RH		 920 pos += pad;
921 vma += pad;
923f08ff 922 obj_datasec (abfd)->vma = vma;
252b5132
RH		 923 }
924 else
923f08ff
AM		 925 vma = obj_datasec (abfd)->vma;
926 obj_datasec (abfd)->filepos = pos;
927 pos += obj_datasec (abfd)->_raw_size;
928 vma += obj_datasec (abfd)->_raw_size;
252b5132
RH		 929
930 /* BSS. */
923f08ff 931 if (!obj_bsssec (abfd)->user_set_vma)
252b5132
RH		 932 {
933#if 0
923f08ff 934 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
252b5132 935#endif
923f08ff 936 obj_datasec (abfd)->_raw_size += pad;
252b5132
RH		 937 pos += pad;
938 vma += pad;
923f08ff 939 obj_bsssec (abfd)->vma = vma;
252b5132
RH		 940 }
941 else
942 {
08da05b0 943 /* The VMA of the .bss section is set by the VMA of the
252b5132
RH		 944 .data section plus the size of the .data section. We may
945 need to add padding bytes to make this true. */
946 pad = obj_bsssec (abfd)->vma - vma;
947 if (pad > 0)
948 {
949 obj_datasec (abfd)->_raw_size += pad;
950 pos += pad;
951 }
952 }
923f08ff 953 obj_bsssec (abfd)->filepos = pos;
252b5132
RH		 954
955 /* Fix up the exec header. */
923f08ff
AM		 956 execp->a_text = obj_textsec (abfd)->_raw_size;
957 execp->a_data = obj_datasec (abfd)->_raw_size;
958 execp->a_bss = obj_bsssec (abfd)->_raw_size;
252b5132
RH		 959 N_SET_MAGIC (*execp, OMAGIC);
960}
961
962static void
963adjust_z_magic (abfd, execp)
964 bfd *abfd;
965 struct internal_exec *execp;
966{
967 bfd_size_type data_pad, text_pad;
968 file_ptr text_end;
dc810e39 969 const struct aout_backend_data *abdp;
252b5132 970 int ztih; /* Nonzero if text includes exec header. */
0ef5a5bd 971
252b5132
RH		 972 abdp = aout_backend_info (abfd);
973
974 /* Text. */
975 ztih = (abdp != NULL
976 && (abdp->text_includes_header
977 || obj_aout_subformat (abfd) == q_magic_format));
923f08ff
AM		 978 obj_textsec (abfd)->filepos = (ztih
979 ? adata (abfd).exec_bytes_size
980 : adata (abfd).zmagic_disk_block_size);
981 if (! obj_textsec (abfd)->user_set_vma)
252b5132
RH		 982 {
983 /* ?? Do we really need to check for relocs here? */
923f08ff
AM		 984 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
985 ? 0
986 : (ztih
987 ? (abdp->default_text_vma
988 + adata (abfd).exec_bytes_size)
989 : abdp->default_text_vma));
252b5132
RH		 990 text_pad = 0;
991 }
992 else
993 {
994 /* The .text section is being loaded at an unusual address. We
995 may need to pad it such that the .data section starts at a page
996 boundary. */
997 if (ztih)
998 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
999 & (adata (abfd).page_size - 1));
1000 else
1001 text_pad = ((- obj_textsec (abfd)->vma)
1002 & (adata (abfd).page_size - 1));
1003 }
1004
1005 /* Find start of data. */
1006 if (ztih)
1007 {
1008 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
1009 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1010 }
1011 else
1012 {
1013 /* Note that if page_size == zmagic_disk_block_size, then
1014 filepos == page_size, and this case is the same as the ztih
1015 case. */
1016 text_end = obj_textsec (abfd)->_raw_size;
1017 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1018 text_end += obj_textsec (abfd)->filepos;
1019 }
923f08ff 1020 obj_textsec (abfd)->_raw_size += text_pad;
252b5132
RH		 1021 text_end += text_pad;
1022
1023 /* Data. */
923f08ff 1024 if (!obj_datasec (abfd)->user_set_vma)
252b5132
RH		 1025 {
1026 bfd_vma vma;
923f08ff
AM		 1027 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->_raw_size;
1028 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
252b5132
RH		 1029 }
1030 if (abdp && abdp->zmagic_mapped_contiguous)
1031 {
dee0a8f4
NC		 1032 asection * text = obj_textsec (abfd);
1033 asection * data = obj_datasec (abfd);
1034
1035 text_pad = data->vma - (text->vma + text->_raw_size);
1036 /* Only pad the text section if the data
1037 section is going to be placed after it. */
1038 if (text_pad > 0)
1039 text->_raw_size += text_pad;
252b5132 1040 }
923f08ff
AM		 1041 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1042 + obj_textsec (abfd)->_raw_size);
0ef5a5bd 1043
252b5132 1044 /* Fix up exec header while we're at it. */
923f08ff 1045 execp->a_text = obj_textsec (abfd)->_raw_size;
252b5132 1046 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
923f08ff 1047 execp->a_text += adata (abfd).exec_bytes_size;
252b5132
RH		 1048 if (obj_aout_subformat (abfd) == q_magic_format)
1049 N_SET_MAGIC (*execp, QMAGIC);
1050 else
1051 N_SET_MAGIC (*execp, ZMAGIC);
1052
1053 /* Spec says data section should be rounded up to page boundary. */
923f08ff
AM		 1054 obj_datasec (abfd)->_raw_size
1055 = align_power (obj_datasec (abfd)->_raw_size,
1056 obj_bsssec (abfd)->alignment_power);
1057 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->_raw_size,
1058 adata (abfd).page_size);
1059 data_pad = execp->a_data - obj_datasec (abfd)->_raw_size;
252b5132
RH		 1060
1061 /* BSS. */
923f08ff
AM		 1062 if (!obj_bsssec (abfd)->user_set_vma)
1063 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1064 + obj_datasec (abfd)->_raw_size);
252b5132
RH		 1065 /* If the BSS immediately follows the data section and extra space
1066 in the page is left after the data section, fudge data
1067 in the header so that the bss section looks smaller by that
1068 amount. We'll start the bss section there, and lie to the OS.
1069 (Note that a linker script, as well as the above assignment,
1070 could have explicitly set the BSS vma to immediately follow
1071 the data section.) */
923f08ff
AM		 1072 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1073 == obj_datasec (abfd)->vma + obj_datasec (abfd)->_raw_size)
1074 execp->a_bss = (data_pad > obj_bsssec (abfd)->_raw_size
1075 ? 0 : obj_bsssec (abfd)->_raw_size - data_pad);
252b5132 1076 else
923f08ff 1077 execp->a_bss = obj_bsssec (abfd)->_raw_size;
252b5132
RH		 1078}
1079
1080static void
1081adjust_n_magic (abfd, execp)
1082 bfd *abfd;
1083 struct internal_exec *execp;
1084{
923f08ff 1085 file_ptr pos = adata (abfd).exec_bytes_size;
252b5132
RH		 1086 bfd_vma vma = 0;
1087 int pad;
0ef5a5bd 1088
252b5132 1089 /* Text. */
923f08ff
AM		 1090 obj_textsec (abfd)->filepos = pos;
1091 if (!obj_textsec (abfd)->user_set_vma)
1092 obj_textsec (abfd)->vma = vma;
252b5132 1093 else
923f08ff
AM		 1094 vma = obj_textsec (abfd)->vma;
1095 pos += obj_textsec (abfd)->_raw_size;
1096 vma += obj_textsec (abfd)->_raw_size;
252b5132
RH		 1097
1098 /* Data. */
923f08ff
AM		 1099 obj_datasec (abfd)->filepos = pos;
1100 if (!obj_datasec (abfd)->user_set_vma)
1101 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1102 vma = obj_datasec (abfd)->vma;
0ef5a5bd 1103
252b5132 1104 /* Since BSS follows data immediately, see if it needs alignment. */
923f08ff
AM		 1105 vma += obj_datasec (abfd)->_raw_size;
1106 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1107 obj_datasec (abfd)->_raw_size += pad;
1108 pos += obj_datasec (abfd)->_raw_size;
252b5132
RH		 1109
1110 /* BSS. */
923f08ff
AM		 1111 if (!obj_bsssec (abfd)->user_set_vma)
1112 obj_bsssec (abfd)->vma = vma;
252b5132 1113 else
923f08ff 1114 vma = obj_bsssec (abfd)->vma;
252b5132
RH		 1115
1116 /* Fix up exec header. */
923f08ff
AM		 1117 execp->a_text = obj_textsec (abfd)->_raw_size;
1118 execp->a_data = obj_datasec (abfd)->_raw_size;
1119 execp->a_bss = obj_bsssec (abfd)->_raw_size;
252b5132
RH		 1120 N_SET_MAGIC (*execp, NMAGIC);
1121}
1122
b34976b6 1123bfd_boolean
252b5132
RH		 1124NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1125 bfd *abfd;
1126 bfd_size_type *text_size;
7442e600 1127 file_ptr *text_end ATTRIBUTE_UNUSED;
252b5132
RH		 1128{
1129 struct internal_exec *execp = exec_hdr (abfd);
1130
1131 if (! NAME(aout,make_sections) (abfd))
b34976b6 1132 return FALSE;
252b5132 1133
923f08ff 1134 if (adata (abfd).magic != undecided_magic)
b34976b6 1135 return TRUE;
252b5132 1136
923f08ff
AM		 1137 obj_textsec (abfd)->_raw_size =
1138 align_power (obj_textsec (abfd)->_raw_size,
1139 obj_textsec (abfd)->alignment_power);
252b5132
RH		 1140
1141 *text_size = obj_textsec (abfd)->_raw_size;
1142 /* Rule (heuristic) for when to pad to a new page. Note that there
1143 are (at least) two ways demand-paged (ZMAGIC) files have been
1144 handled. Most Berkeley-based systems start the text segment at
1145 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1146 segment right after the exec header; the latter is counted in the
1147 text segment size, and is paged in by the kernel with the rest of
0ef5a5bd 1148 the text. */
252b5132
RH		 1149
1150 /* This perhaps isn't the right way to do this, but made it simpler for me
1151 to understand enough to implement it. Better would probably be to go
1152 right from BFD flags to alignment/positioning characteristics. But the
1153 old code was sloppy enough about handling the flags, and had enough
1154 other magic, that it was a little hard for me to understand. I think
1155 I understand it better now, but I haven't time to do the cleanup this
1156 minute. */
1157
1158 if (abfd->flags & D_PAGED)
1159 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
923f08ff 1160 adata (abfd).magic = z_magic;
252b5132 1161 else if (abfd->flags & WP_TEXT)
923f08ff 1162 adata (abfd).magic = n_magic;
252b5132 1163 else
923f08ff 1164 adata (abfd).magic = o_magic;
252b5132
RH		 1165
1166#ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1167#if __GNUC__ >= 2
1168 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1169 ({ char *str;
923f08ff
AM		 1170 switch (adata (abfd).magic)
1171 {
1172 case n_magic: str = "NMAGIC"; break;
1173 case o_magic: str = "OMAGIC"; break;
1174 case z_magic: str = "ZMAGIC"; break;
1175 default: abort ();
1176 }
252b5132
RH		 1177 str;
1178 }),
923f08ff
AM		 1179 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size,
1180 obj_textsec (abfd)->alignment_power,
1181 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size,
1182 obj_datasec (abfd)->alignment_power,
1183 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size,
1184 obj_bsssec (abfd)->alignment_power);
252b5132
RH		 1185#endif
1186#endif
1187
923f08ff 1188 switch (adata (abfd).magic)
252b5132
RH		 1189 {
1190 case o_magic:
1191 adjust_o_magic (abfd, execp);
1192 break;
1193 case z_magic:
1194 adjust_z_magic (abfd, execp);
1195 break;
1196 case n_magic:
1197 adjust_n_magic (abfd, execp);
1198 break;
1199 default:
1200 abort ();
1201 }
1202
1203#ifdef BFD_AOUT_DEBUG
1204 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
923f08ff
AM		 1205 obj_textsec (abfd)->vma, obj_textsec (abfd)->_raw_size,
1206 obj_textsec (abfd)->filepos,
1207 obj_datasec (abfd)->vma, obj_datasec (abfd)->_raw_size,
1208 obj_datasec (abfd)->filepos,
1209 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->_raw_size);
252b5132
RH		 1210#endif
1211
b34976b6 1212 return TRUE;
252b5132
RH		 1213}
1214
1215/*
1216FUNCTION
1217 aout_@var{size}_new_section_hook
1218
1219SYNOPSIS
b34976b6 1220 bfd_boolean aout_@var{size}_new_section_hook,
252b5132
RH		 1221 (bfd *abfd,
1222 asection *newsect));
1223
1224DESCRIPTION
1225 Called by the BFD in response to a @code{bfd_make_section}
1226 request.
1227*/
b34976b6 1228bfd_boolean
252b5132
RH		 1229NAME(aout,new_section_hook) (abfd, newsect)
1230 bfd *abfd;
1231 asection *newsect;
1232{
f7c33884 1233 /* Align to double at least. */
923f08ff 1234 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
252b5132 1235
252b5132 1236 if (bfd_get_format (abfd) == bfd_object)
f7c33884
NC		 1237 {
1238 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1239 {
1240 obj_textsec (abfd)= newsect;
1241 newsect->target_index = N_TEXT;
b34976b6 1242 return TRUE;
f7c33884 1243 }
252b5132 1244
f7c33884
NC		 1245 if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1246 {
1247 obj_datasec (abfd) = newsect;
1248 newsect->target_index = N_DATA;
b34976b6 1249 return TRUE;
f7c33884 1250 }
252b5132 1251
f7c33884
NC		 1252 if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1253 {
1254 obj_bsssec (abfd) = newsect;
1255 newsect->target_index = N_BSS;
b34976b6 1256 return TRUE;
f7c33884
NC		 1257 }
1258 }
252b5132 1259
f7c33884 1260 /* We allow more than three sections internally. */
b34976b6 1261 return TRUE;
252b5132
RH		 1262}
1263
b34976b6 1264bfd_boolean
252b5132
RH		 1265NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1266 bfd *abfd;
1267 sec_ptr section;
0f867abe 1268 const PTR location;
252b5132
RH		 1269 file_ptr offset;
1270 bfd_size_type count;
1271{
1272 file_ptr text_end;
1273 bfd_size_type text_size;
1274
1275 if (! abfd->output_has_begun)
1276 {
1277 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
b34976b6 1278 return FALSE;
252b5132
RH		 1279 }
1280
1281 if (section == obj_bsssec (abfd))
1282 {
1283 bfd_set_error (bfd_error_no_contents);
b34976b6 1284 return FALSE;
252b5132
RH		 1285 }
1286
1287 if (section != obj_textsec (abfd)
1288 && section != obj_datasec (abfd))
1289 {
e6af3a53
NC		 1290 if (aout_section_merge_with_text_p (abfd, section))
1291 section->filepos = obj_textsec (abfd)->filepos +
1292 (section->vma - obj_textsec (abfd)->vma);
1293 else
1294 {
1295 (*_bfd_error_handler)
1296 (_("%s: can not represent section `%s' in a.out object file format"),
1297 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1298 bfd_set_error (bfd_error_nonrepresentable_section);
1299 return FALSE;
1300 }
252b5132
RH		 1301 }
1302
1303 if (count != 0)
1304 {
1305 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
dc810e39 1306 || bfd_bwrite (location, count, abfd) != count)
b34976b6 1307 return FALSE;
252b5132
RH		 1308 }
1309
b34976b6 1310 return TRUE;
252b5132
RH		 1311}
1312\f
1313/* Read the external symbols from an a.out file. */
1314
b34976b6 1315static bfd_boolean
252b5132
RH		 1316aout_get_external_symbols (abfd)
1317 bfd *abfd;
1318{
1319 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1320 {
1321 bfd_size_type count;
1322 struct external_nlist *syms;
dc810e39 1323 bfd_size_type amt;
252b5132
RH		 1324
1325 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1326
1327#ifdef USE_MMAP
82e51918
AM		 1328 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1329 exec_hdr (abfd)->a_syms,
b34976b6
AM		 1330 &obj_aout_sym_window (abfd), TRUE))
1331 return FALSE;
252b5132
RH		 1332 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1333#else
1334 /* We allocate using malloc to make the values easy to free
1335 later on. If we put them on the objalloc it might not be
1336 possible to free them. */
1337 syms = ((struct external_nlist *)
dc810e39 1338 bfd_malloc (count * EXTERNAL_NLIST_SIZE));
252b5132 1339 if (syms == (struct external_nlist *) NULL && count != 0)
b34976b6 1340 return FALSE;
252b5132 1341
dc810e39 1342 amt = exec_hdr (abfd)->a_syms;
252b5132 1343 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
dc810e39 1344 || bfd_bread (syms, amt, abfd) != amt)
252b5132
RH		 1345 {
1346 free (syms);
b34976b6 1347 return FALSE;
252b5132
RH		 1348 }
1349#endif
1350
1351 obj_aout_external_syms (abfd) = syms;
1352 obj_aout_external_sym_count (abfd) = count;
1353 }
0ef5a5bd 1354
252b5132
RH		 1355 if (obj_aout_external_strings (abfd) == NULL
1356 && exec_hdr (abfd)->a_syms != 0)
1357 {
1358 unsigned char string_chars[BYTES_IN_WORD];
1359 bfd_size_type stringsize;
1360 char *strings;
dc810e39 1361 bfd_size_type amt = BYTES_IN_WORD;
252b5132
RH		 1362
1363 /* Get the size of the strings. */
1364 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
dc810e39 1365 || bfd_bread ((PTR) string_chars, amt, abfd) != amt)
b34976b6 1366 return FALSE;
252b5132
RH		 1367 stringsize = GET_WORD (abfd, string_chars);
1368
1369#ifdef USE_MMAP
82e51918 1370 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
b34976b6
AM		 1371 &obj_aout_string_window (abfd), TRUE))
1372 return FALSE;
252b5132
RH		 1373 strings = (char *) obj_aout_string_window (abfd).data;
1374#else
dc810e39 1375 strings = (char *) bfd_malloc (stringsize + 1);
252b5132 1376 if (strings == NULL)
b34976b6 1377 return FALSE;
252b5132
RH		 1378
1379 /* Skip space for the string count in the buffer for convenience
1380 when using indexes. */
dc810e39
AM		 1381 amt = stringsize - BYTES_IN_WORD;
1382 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
252b5132
RH		 1383 {
1384 free (strings);
b34976b6 1385 return FALSE;
252b5132
RH		 1386 }
1387#endif
1388
1389 /* Ensure that a zero index yields an empty string. */
1390 strings[0] = '\0';
1391
1392 strings[stringsize - 1] = 0;
1393
1394 obj_aout_external_strings (abfd) = strings;
1395 obj_aout_external_string_size (abfd) = stringsize;
1396 }
1397
b34976b6 1398 return TRUE;
252b5132
RH		 1399}
1400
1401/* Translate an a.out symbol into a BFD symbol. The desc, other, type
1402 and symbol->value fields of CACHE_PTR will be set from the a.out
1403 nlist structure. This function is responsible for setting
1404 symbol->flags and symbol->section, and adjusting symbol->value. */
1405
b34976b6 1406static bfd_boolean
252b5132
RH		 1407translate_from_native_sym_flags (abfd, cache_ptr)
1408 bfd *abfd;
1409 aout_symbol_type *cache_ptr;
1410{
1411 flagword visible;
1412
1413 if ((cache_ptr->type & N_STAB) != 0
1414 || cache_ptr->type == N_FN)
1415 {
1416 asection *sec;
1417
1418 /* This is a debugging symbol. */
252b5132
RH		 1419 cache_ptr->symbol.flags = BSF_DEBUGGING;
1420
1421 /* Work out the symbol section. */
1422 switch (cache_ptr->type & N_TYPE)
1423 {
1424 case N_TEXT:
1425 case N_FN:
1426 sec = obj_textsec (abfd);
1427 break;
1428 case N_DATA:
1429 sec = obj_datasec (abfd);
1430 break;
1431 case N_BSS:
1432 sec = obj_bsssec (abfd);
1433 break;
1434 default:
1435 case N_ABS:
1436 sec = bfd_abs_section_ptr;
1437 break;
1438 }
1439
1440 cache_ptr->symbol.section = sec;
1441 cache_ptr->symbol.value -= sec->vma;
1442
b34976b6 1443 return TRUE;
252b5132
RH		 1444 }
1445
1446 /* Get the default visibility. This does not apply to all types, so
1447 we just hold it in a local variable to use if wanted. */
1448 if ((cache_ptr->type & N_EXT) == 0)
1449 visible = BSF_LOCAL;
1450 else
1451 visible = BSF_GLOBAL;
1452
1453 switch (cache_ptr->type)
1454 {
1455 default:
1456 case N_ABS: case N_ABS | N_EXT:
1457 cache_ptr->symbol.section = bfd_abs_section_ptr;
1458 cache_ptr->symbol.flags = visible;
1459 break;
1460
1461 case N_UNDF | N_EXT:
1462 if (cache_ptr->symbol.value != 0)
1463 {
1464 /* This is a common symbol. */
1465 cache_ptr->symbol.flags = BSF_GLOBAL;
1466 cache_ptr->symbol.section = bfd_com_section_ptr;
1467 }
1468 else
1469 {
1470 cache_ptr->symbol.flags = 0;
1471 cache_ptr->symbol.section = bfd_und_section_ptr;
1472 }
1473 break;
1474
1475 case N_TEXT: case N_TEXT | N_EXT:
1476 cache_ptr->symbol.section = obj_textsec (abfd);
1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1478 cache_ptr->symbol.flags = visible;
1479 break;
1480
1481 /* N_SETV symbols used to represent set vectors placed in the
1482 data section. They are no longer generated. Theoretically,
1483 it was possible to extract the entries and combine them with
1484 new ones, although I don't know if that was ever actually
1485 done. Unless that feature is restored, treat them as data
1486 symbols. */
1487 case N_SETV: case N_SETV | N_EXT:
1488 case N_DATA: case N_DATA | N_EXT:
1489 cache_ptr->symbol.section = obj_datasec (abfd);
1490 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1491 cache_ptr->symbol.flags = visible;
1492 break;
1493
1494 case N_BSS: case N_BSS | N_EXT:
1495 cache_ptr->symbol.section = obj_bsssec (abfd);
1496 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1497 cache_ptr->symbol.flags = visible;
1498 break;
1499
1500 case N_SETA: case N_SETA | N_EXT:
1501 case N_SETT: case N_SETT | N_EXT:
1502 case N_SETD: case N_SETD | N_EXT:
1503 case N_SETB: case N_SETB | N_EXT:
1504 {
1505 /* This code is no longer needed. It used to be used to make
1506 the linker handle set symbols, but they are now handled in
1507 the add_symbols routine instead. */
1508#if 0
1509 asection *section;
1510 arelent_chain *reloc;
1511 asection *into_section;
dc810e39 1512 bfd_size_type amt;
252b5132
RH		 1513
1514 /* This is a set symbol. The name of the symbol is the name
1515 of the set (e.g., __CTOR_LIST__). The value of the symbol
1516 is the value to add to the set. We create a section with
1517 the same name as the symbol, and add a reloc to insert the
1518 appropriate value into the section.
1519
1520 This action is actually obsolete; it used to make the
1521 linker do the right thing, but the linker no longer uses
1522 this function. */
1523
1524 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1525 if (section == NULL)
1526 {
1527 char *copy;
1528
dc810e39
AM		 1529 amt = strlen (cache_ptr->symbol.name) + 1;
1530 copy = bfd_alloc (abfd, amt);
252b5132 1531 if (copy == NULL)
b34976b6 1532 return FALSE;
252b5132
RH		 1533
1534 strcpy (copy, cache_ptr->symbol.name);
1535 section = bfd_make_section (abfd, copy);
1536 if (section == NULL)
b34976b6 1537 return FALSE;
252b5132
RH		 1538 }
1539
dc810e39
AM		 1540 amt = sizeof (arelent_chain);
1541 reloc = (arelent_chain *) bfd_alloc (abfd, amt);
252b5132 1542 if (reloc == NULL)
b34976b6 1543 return FALSE;
252b5132
RH		 1544
1545 /* Build a relocation entry for the constructor. */
1546 switch (cache_ptr->type & N_TYPE)
1547 {
1548 case N_SETA:
1549 into_section = bfd_abs_section_ptr;
1550 cache_ptr->type = N_ABS;
1551 break;
1552 case N_SETT:
1553 into_section = obj_textsec (abfd);
1554 cache_ptr->type = N_TEXT;
1555 break;
1556 case N_SETD:
1557 into_section = obj_datasec (abfd);
1558 cache_ptr->type = N_DATA;
1559 break;
1560 case N_SETB:
1561 into_section = obj_bsssec (abfd);
1562 cache_ptr->type = N_BSS;
1563 break;
1564 }
1565
1566 /* Build a relocation pointing into the constructor section
1567 pointing at the symbol in the set vector specified. */
1568 reloc->relent.addend = cache_ptr->symbol.value;
1569 cache_ptr->symbol.section = into_section;
1570 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1571
1572 /* We modify the symbol to belong to a section depending upon
1573 the name of the symbol, and add to the size of the section
1574 to contain a pointer to the symbol. Build a reloc entry to
1575 relocate to this symbol attached to this section. */
1576 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1577
1578 section->reloc_count++;
1579 section->alignment_power = 2;
1580
1581 reloc->next = section->constructor_chain;
1582 section->constructor_chain = reloc;
1583 reloc->relent.address = section->_raw_size;
1584 section->_raw_size += BYTES_IN_WORD;
1585
923f08ff 1586 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO (abfd);
252b5132
RH		 1587
1588#endif /* 0 */
1589
1590 switch (cache_ptr->type & N_TYPE)
1591 {
1592 case N_SETA:
1593 cache_ptr->symbol.section = bfd_abs_section_ptr;
1594 break;
1595 case N_SETT:
1596 cache_ptr->symbol.section = obj_textsec (abfd);
1597 break;
1598 case N_SETD:
1599 cache_ptr->symbol.section = obj_datasec (abfd);
1600 break;
1601 case N_SETB:
1602 cache_ptr->symbol.section = obj_bsssec (abfd);
1603 break;
1604 }
1605
1606 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1607 }
1608 break;
1609
1610 case N_WARNING:
1611 /* This symbol is the text of a warning message. The next
1612 symbol is the symbol to associate the warning with. If a
1613 reference is made to that symbol, a warning is issued. */
1614 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1615 cache_ptr->symbol.section = bfd_abs_section_ptr;
1616 break;
1617
1618 case N_INDR: case N_INDR | N_EXT:
1619 /* An indirect symbol. This consists of two symbols in a row.
1620 The first symbol is the name of the indirection. The second
1621 symbol is the name of the target. A reference to the first
1622 symbol becomes a reference to the second. */
1623 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1624 cache_ptr->symbol.section = bfd_ind_section_ptr;
1625 break;
1626
1627 case N_WEAKU:
1628 cache_ptr->symbol.section = bfd_und_section_ptr;
1629 cache_ptr->symbol.flags = BSF_WEAK;
1630 break;
1631
1632 case N_WEAKA:
1633 cache_ptr->symbol.section = bfd_abs_section_ptr;
1634 cache_ptr->symbol.flags = BSF_WEAK;
1635 break;
1636
1637 case N_WEAKT:
1638 cache_ptr->symbol.section = obj_textsec (abfd);
1639 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1640 cache_ptr->symbol.flags = BSF_WEAK;
1641 break;
1642
1643 case N_WEAKD:
1644 cache_ptr->symbol.section = obj_datasec (abfd);
1645 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1646 cache_ptr->symbol.flags = BSF_WEAK;
1647 break;
1648
1649 case N_WEAKB:
1650 cache_ptr->symbol.section = obj_bsssec (abfd);
1651 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1652 cache_ptr->symbol.flags = BSF_WEAK;
1653 break;
1654 }
1655
b34976b6 1656 return TRUE;
252b5132
RH		 1657}
1658
1659/* Set the fields of SYM_POINTER according to CACHE_PTR. */
1660
b34976b6 1661static bfd_boolean
252b5132
RH		 1662translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1663 bfd *abfd;
1664 asymbol *cache_ptr;
1665 struct external_nlist *sym_pointer;
1666{
1667 bfd_vma value = cache_ptr->value;
1668 asection *sec;
1669 bfd_vma off;
1670
1671 /* Mask out any existing type bits in case copying from one section
1672 to another. */
1673 sym_pointer->e_type[0] &= ~N_TYPE;
1674
1675 sec = bfd_get_section (cache_ptr);
1676 off = 0;
1677
1678 if (sec == NULL)
1679 {
1680 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1681 file. */
1682 (*_bfd_error_handler)
1683 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
0ef5a5bd 1684 bfd_get_filename (abfd),
252b5132
RH		 1685 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1686 bfd_set_error (bfd_error_nonrepresentable_section);
b34976b6 1687 return FALSE;
252b5132
RH		 1688 }
1689
1690 if (sec->output_section != NULL)
1691 {
1692 off = sec->output_offset;
1693 sec = sec->output_section;
1694 }
1695
1696 if (bfd_is_abs_section (sec))
1697 sym_pointer->e_type[0] |= N_ABS;
1698 else if (sec == obj_textsec (abfd))
1699 sym_pointer->e_type[0] |= N_TEXT;
1700 else if (sec == obj_datasec (abfd))
1701 sym_pointer->e_type[0] |= N_DATA;
1702 else if (sec == obj_bsssec (abfd))
1703 sym_pointer->e_type[0] |= N_BSS;
1704 else if (bfd_is_und_section (sec))
1705 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1706 else if (bfd_is_ind_section (sec))
1707 sym_pointer->e_type[0] = N_INDR;
1708 else if (bfd_is_com_section (sec))
1709 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1710 else
1711 {
e6af3a53
NC		 1712 if (aout_section_merge_with_text_p (abfd, sec))
1713 sym_pointer->e_type[0] |= N_TEXT;
1714 else
1715 {
1716 (*_bfd_error_handler)
1717 (_("%s: can not represent section `%s' in a.out object file format"),
1718 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1719 bfd_set_error (bfd_error_nonrepresentable_section);
1720 return FALSE;
1721 }
252b5132
RH		 1722 }
1723
f7c33884 1724 /* Turn the symbol from section relative to absolute again. */
252b5132
RH		 1725 value += sec->vma + off;
1726
1727 if ((cache_ptr->flags & BSF_WARNING) != 0)
1728 sym_pointer->e_type[0] = N_WARNING;
1729
1730 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1731 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1732 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1733 sym_pointer->e_type[0] |= N_EXT;
930d924d
L		 1734 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1735 sym_pointer->e_type[0] &= ~N_EXT;
252b5132
RH		 1736
1737 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1738 {
1739 int type = ((aout_symbol_type *) cache_ptr)->type;
f7c33884 1740
252b5132
RH		 1741 switch (type)
1742 {
1743 case N_ABS: type = N_SETA; break;
1744 case N_TEXT: type = N_SETT; break;
1745 case N_DATA: type = N_SETD; break;
1746 case N_BSS: type = N_SETB; break;
1747 }
1748 sym_pointer->e_type[0] = type;
1749 }
1750
1751 if ((cache_ptr->flags & BSF_WEAK) != 0)
1752 {
1753 int type;
1754
1755 switch (sym_pointer->e_type[0] & N_TYPE)
1756 {
1757 default:
1758 case N_ABS: type = N_WEAKA; break;
1759 case N_TEXT: type = N_WEAKT; break;
1760 case N_DATA: type = N_WEAKD; break;
1761 case N_BSS: type = N_WEAKB; break;
1762 case N_UNDF: type = N_WEAKU; break;
1763 }
1764 sym_pointer->e_type[0] = type;
1765 }
1766
923f08ff 1767 PUT_WORD (abfd, value, sym_pointer->e_value);
252b5132 1768
b34976b6 1769 return TRUE;
252b5132
RH		 1770}
1771\f
0ef5a5bd 1772/* Native-level interface to symbols. */
252b5132
RH		 1773
1774asymbol *
1775NAME(aout,make_empty_symbol) (abfd)
1776 bfd *abfd;
1777{
dc810e39
AM		 1778 bfd_size_type amt = sizeof (aout_symbol_type);
1779 aout_symbol_type *new = (aout_symbol_type *) bfd_zalloc (abfd, amt);
252b5132
RH		 1780 if (!new)
1781 return NULL;
1782 new->symbol.the_bfd = abfd;
1783
1784 return &new->symbol;
1785}
1786
1787/* Translate a set of internal symbols into external symbols. */
1788
b34976b6 1789bfd_boolean
252b5132
RH		 1790NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1791 bfd *abfd;
1792 aout_symbol_type *in;
1793 struct external_nlist *ext;
1794 bfd_size_type count;
1795 char *str;
1796 bfd_size_type strsize;
b34976b6 1797 bfd_boolean dynamic;
252b5132
RH		 1798{
1799 struct external_nlist *ext_end;
1800
1801 ext_end = ext + count;
1802 for (; ext < ext_end; ext++, in++)
1803 {
1804 bfd_vma x;
1805
1806 x = GET_WORD (abfd, ext->e_strx);
1807 in->symbol.the_bfd = abfd;
1808
1809 /* For the normal symbols, the zero index points at the number
1810 of bytes in the string table but is to be interpreted as the
1811 null string. For the dynamic symbols, the number of bytes in
1812 the string table is stored in the __DYNAMIC structure and the
1813 zero index points at an actual string. */
1814 if (x == 0 && ! dynamic)
1815 in->symbol.name = "";
1816 else if (x < strsize)
1817 in->symbol.name = str + x;
1818 else
b34976b6 1819 return FALSE;
252b5132
RH		 1820
1821 in->symbol.value = GET_SWORD (abfd, ext->e_value);
dc810e39
AM		 1822 in->desc = H_GET_16 (abfd, ext->e_desc);
1823 in->other = H_GET_8 (abfd, ext->e_other);
1824 in->type = H_GET_8 (abfd, ext->e_type);
252b5132
RH		 1825 in->symbol.udata.p = NULL;
1826
1827 if (! translate_from_native_sym_flags (abfd, in))
b34976b6 1828 return FALSE;
252b5132
RH		 1829
1830 if (dynamic)
1831 in->symbol.flags |= BSF_DYNAMIC;
1832 }
1833
b34976b6 1834 return TRUE;
252b5132
RH		 1835}
1836
1837/* We read the symbols into a buffer, which is discarded when this
1838 function exits. We read the strings into a buffer large enough to
0ef5a5bd 1839 hold them all plus all the cached symbol entries. */
252b5132 1840
b34976b6 1841bfd_boolean
252b5132
RH		 1842NAME(aout,slurp_symbol_table) (abfd)
1843 bfd *abfd;
1844{
1845 struct external_nlist *old_external_syms;
1846 aout_symbol_type *cached;
dc810e39 1847 bfd_size_type cached_size;
252b5132 1848
f7c33884 1849 /* If there's no work to be done, don't do any. */
252b5132 1850 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
b34976b6 1851 return TRUE;
252b5132
RH		 1852
1853 old_external_syms = obj_aout_external_syms (abfd);
1854
1855 if (! aout_get_external_symbols (abfd))
b34976b6 1856 return FALSE;
252b5132 1857
dc810e39
AM		 1858 cached_size = obj_aout_external_sym_count (abfd);
1859 cached_size *= sizeof (aout_symbol_type);
9bab7074 1860 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
252b5132 1861 if (cached == NULL && cached_size != 0)
b34976b6 1862 return FALSE;
252b5132
RH		 1863
1864 /* Convert from external symbol information to internal. */
1865 if (! (NAME(aout,translate_symbol_table)
1866 (abfd, cached,
1867 obj_aout_external_syms (abfd),
1868 obj_aout_external_sym_count (abfd),
1869 obj_aout_external_strings (abfd),
1870 obj_aout_external_string_size (abfd),
b34976b6 1871 FALSE)))
252b5132
RH		 1872 {
1873 free (cached);
b34976b6 1874 return FALSE;
252b5132
RH		 1875 }
1876
1877 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1878
1879 obj_aout_symbols (abfd) = cached;
1880
1881 /* It is very likely that anybody who calls this function will not
1882 want the external symbol information, so if it was allocated
1883 because of our call to aout_get_external_symbols, we free it up
1884 right away to save space. */
1885 if (old_external_syms == (struct external_nlist *) NULL
1886 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1887 {
1888#ifdef USE_MMAP
1889 bfd_free_window (&obj_aout_sym_window (abfd));
1890#else
1891 free (obj_aout_external_syms (abfd));
1892#endif
1893 obj_aout_external_syms (abfd) = NULL;
1894 }
1895
b34976b6 1896 return TRUE;
252b5132
RH		 1897}
1898\f
1899/* We use a hash table when writing out symbols so that we only write
1900 out a particular string once. This helps particularly when the
1901 linker writes out stabs debugging entries, because each different
1902 contributing object file tends to have many duplicate stabs
1903 strings.
1904
1905 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1906 if BFD_TRADITIONAL_FORMAT is set. */
1907
1908static bfd_size_type add_to_stringtab
b34976b6
AM		 1909 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, bfd_boolean));
1910static bfd_boolean emit_stringtab
1911 PARAMS ((bfd *, struct bfd_strtab_hash *));
252b5132
RH		 1912
1913/* Get the index of a string in a strtab, adding it if it is not
1914 already present. */
1915
1916static INLINE bfd_size_type
1917add_to_stringtab (abfd, tab, str, copy)
1918 bfd *abfd;
1919 struct bfd_strtab_hash *tab;
1920 const char *str;
b34976b6 1921 bfd_boolean copy;
252b5132 1922{
b34976b6 1923 bfd_boolean hash;
252b5132
RH		 1924 bfd_size_type index;
1925
1926 /* An index of 0 always means the empty string. */
1927 if (str == 0 || *str == '\0')
1928 return 0;
1929
1930 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1931 doesn't understand a hashed string table. */
b34976b6 1932 hash = TRUE;
252b5132 1933 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
b34976b6 1934 hash = FALSE;
252b5132
RH		 1935
1936 index = _bfd_stringtab_add (tab, str, hash, copy);
1937
1938 if (index != (bfd_size_type) -1)
1939 {
1940 /* Add BYTES_IN_WORD to the return value to account for the
1941 space taken up by the string table size. */
1942 index += BYTES_IN_WORD;
1943 }
1944
1945 return index;
1946}
1947
1948/* Write out a strtab. ABFD is already at the right location in the
1949 file. */
1950
b34976b6 1951static bfd_boolean
252b5132
RH		 1952emit_stringtab (abfd, tab)
1953 register bfd *abfd;
1954 struct bfd_strtab_hash *tab;
1955{
1956 bfd_byte buffer[BYTES_IN_WORD];
dc810e39 1957 bfd_size_type amt = BYTES_IN_WORD;
252b5132
RH		 1958
1959 /* The string table starts with the size. */
1960 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
dc810e39 1961 if (bfd_bwrite ((PTR) buffer, amt, abfd) != amt)
b34976b6 1962 return FALSE;
252b5132
RH		 1963
1964 return _bfd_stringtab_emit (abfd, tab);
1965}
1966\f
b34976b6 1967bfd_boolean
252b5132
RH		 1968NAME(aout,write_syms) (abfd)
1969 bfd *abfd;
1970{
1971 unsigned int count ;
1972 asymbol **generic = bfd_get_outsymbols (abfd);
1973 struct bfd_strtab_hash *strtab;
1974
1975 strtab = _bfd_stringtab_init ();
1976 if (strtab == NULL)
b34976b6 1977 return FALSE;
252b5132
RH		 1978
1979 for (count = 0; count < bfd_get_symcount (abfd); count++)
1980 {
1981 asymbol *g = generic[count];
1982 bfd_size_type indx;
1983 struct external_nlist nsp;
dc810e39 1984 bfd_size_type amt;
252b5132 1985
b34976b6 1986 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
252b5132
RH		 1987 if (indx == (bfd_size_type) -1)
1988 goto error_return;
1989 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1990
923f08ff 1991 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
252b5132 1992 {
923f08ff
AM		 1993 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1994 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1995 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
252b5132
RH		 1996 }
1997 else
1998 {
dc810e39
AM		 1999 H_PUT_16 (abfd, 0, nsp.e_desc);
2000 H_PUT_8 (abfd, 0, nsp.e_other);
2001 H_PUT_8 (abfd, 0, nsp.e_type);
252b5132
RH		 2002 }
2003
2004 if (! translate_to_native_sym_flags (abfd, g, &nsp))
2005 goto error_return;
2006
dc810e39
AM		 2007 amt = EXTERNAL_NLIST_SIZE;
2008 if (bfd_bwrite ((PTR) &nsp, amt, abfd) != amt)
252b5132
RH		 2009 goto error_return;
2010
2011 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
2012 here, at the end. */
2013 g->KEEPIT = count;
2014 }
2015
2016 if (! emit_stringtab (abfd, strtab))
2017 goto error_return;
2018
2019 _bfd_stringtab_free (strtab);
2020
b34976b6 2021 return TRUE;
252b5132
RH		 2022
2023error_return:
2024 _bfd_stringtab_free (strtab);
b34976b6 2025 return FALSE;
252b5132 2026}
252b5132
RH		 2027\f
2028long
6cee3f79 2029NAME(aout,canonicalize_symtab) (abfd, location)
252b5132
RH		 2030 bfd *abfd;
2031 asymbol **location;
2032{
2033 unsigned int counter = 0;
2034 aout_symbol_type *symbase;
2035
beb0d161 2036 if (!NAME(aout,slurp_symbol_table) (abfd))
252b5132
RH		 2037 return -1;
2038
923f08ff
AM		 2039 for (symbase = obj_aout_symbols (abfd);
2040 counter++ < bfd_get_symcount (abfd);
2041 )
2042 *(location++) = (asymbol *) (symbase++);
252b5132
RH		 2043 *location++ =0;
2044 return bfd_get_symcount (abfd);
2045}
252b5132 2046\f
f7c33884 2047/* Standard reloc stuff. */
0ef5a5bd 2048/* Output standard relocation information to a file in target byte order. */
252b5132
RH		 2049
2050extern void NAME(aout,swap_std_reloc_out)
2051 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2052
2053void
2054NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2055 bfd *abfd;
2056 arelent *g;
2057 struct reloc_std_external *natptr;
2058{
2059 int r_index;
2060 asymbol *sym = *(g->sym_ptr_ptr);
2061 int r_extern;
2062 unsigned int r_length;
2063 int r_pcrel;
2064 int r_baserel, r_jmptable, r_relative;
2065 asection *output_section = sym->section->output_section;
2066
923f08ff 2067 PUT_WORD (abfd, g->address, natptr->r_address);
252b5132 2068
f7c33884
NC		 2069 r_length = g->howto->size ; /* Size as a power of two. */
2070 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
252b5132
RH		 2071 /* XXX This relies on relocs coming from a.out files. */
2072 r_baserel = (g->howto->type & 8) != 0;
2073 r_jmptable = (g->howto->type & 16) != 0;
2074 r_relative = (g->howto->type & 32) != 0;
2075
2076#if 0
2077 /* For a standard reloc, the addend is in the object file. */
2078 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2079#endif
2080
f7c33884 2081 /* Name was clobbered by aout_write_syms to be symbol index. */
252b5132
RH		 2082
2083 /* If this relocation is relative to a symbol then set the
2084 r_index to the symbols index, and the r_extern bit.
2085
2086 Absolute symbols can come in in two ways, either as an offset
2087 from the abs section, or as a symbol which has an abs value.
f7c33884 2088 check for that here. */
252b5132 2089
252b5132
RH		 2090 if (bfd_is_com_section (output_section)
2091 || bfd_is_abs_section (output_section)
2092 || bfd_is_und_section (output_section))
2093 {
2094 if (bfd_abs_section_ptr->symbol == sym)
f7c33884
NC		 2095 {
2096 /* Whoops, looked like an abs symbol, but is
2097 really an offset from the abs section. */
2098 r_index = N_ABS;
2099 r_extern = 0;
2100 }
252b5132 2101 else
f7c33884
NC		 2102 {
2103 /* Fill in symbol. */
2104 r_extern = 1;
2105 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2106 }
252b5132
RH		 2107 }
2108 else
2109 {
f7c33884 2110 /* Just an ordinary section. */
252b5132
RH		 2111 r_extern = 0;
2112 r_index = output_section->target_index;
2113 }
2114
f7c33884 2115 /* Now the fun stuff. */
923f08ff
AM		 2116 if (bfd_header_big_endian (abfd))
2117 {
252b5132
RH		 2118 natptr->r_index[0] = r_index >> 16;
2119 natptr->r_index[1] = r_index >> 8;
2120 natptr->r_index[2] = r_index;
923f08ff
AM		 2121 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2122 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2123 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2124 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2125 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2126 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2127 }
2128 else
2129 {
2130 natptr->r_index[2] = r_index >> 16;
2131 natptr->r_index[1] = r_index >> 8;
2132 natptr->r_index[0] = r_index;
2133 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2134 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2135 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2136 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2137 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2138 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2139 }
252b5132
RH		 2140}
2141
f7c33884 2142/* Extended stuff. */
0ef5a5bd 2143/* Output extended relocation information to a file in target byte order. */
252b5132
RH		 2144
2145extern void NAME(aout,swap_ext_reloc_out)
2146 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2147
2148void
2149NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2150 bfd *abfd;
2151 arelent *g;
2152 register struct reloc_ext_external *natptr;
2153{
2154 int r_index;
2155 int r_extern;
2156 unsigned int r_type;
dc810e39 2157 bfd_vma r_addend;
252b5132
RH		 2158 asymbol *sym = *(g->sym_ptr_ptr);
2159 asection *output_section = sym->section->output_section;
2160
2161 PUT_WORD (abfd, g->address, natptr->r_address);
2162
2163 r_type = (unsigned int) g->howto->type;
2164
2165 r_addend = g->addend;
2166 if ((sym->flags & BSF_SECTION_SYM) != 0)
2167 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2168
2169 /* If this relocation is relative to a symbol then set the
2170 r_index to the symbols index, and the r_extern bit.
2171
2172 Absolute symbols can come in in two ways, either as an offset
2173 from the abs section, or as a symbol which has an abs value.
2174 check for that here. */
252b5132
RH		 2175 if (bfd_is_abs_section (bfd_get_section (sym)))
2176 {
2177 r_extern = 0;
2178 r_index = N_ABS;
2179 }
2180 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2181 {
2182 if (bfd_is_und_section (bfd_get_section (sym))
2183 || (sym->flags & BSF_GLOBAL) != 0)
2184 r_extern = 1;
2185 else
2186 r_extern = 0;
2187 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2188 }
2189 else
2190 {
f7c33884 2191 /* Just an ordinary section. */
252b5132
RH		 2192 r_extern = 0;
2193 r_index = output_section->target_index;
2194 }
2195
f7c33884 2196 /* Now the fun stuff. */
923f08ff
AM		 2197 if (bfd_header_big_endian (abfd))
2198 {
2199 natptr->r_index[0] = r_index >> 16;
2200 natptr->r_index[1] = r_index >> 8;
2201 natptr->r_index[2] = r_index;
2202 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2203 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2204 }
2205 else
2206 {
2207 natptr->r_index[2] = r_index >> 16;
2208 natptr->r_index[1] = r_index >> 8;
2209 natptr->r_index[0] = r_index;
2210 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2211 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2212 }
252b5132
RH		 2213
2214 PUT_WORD (abfd, r_addend, natptr->r_addend);
2215}
2216
2217/* BFD deals internally with all things based from the section they're
2218 in. so, something in 10 bytes into a text section with a base of
2219 50 would have a symbol (.text+10) and know .text vma was 50.
2220
2221 Aout keeps all it's symbols based from zero, so the symbol would
2222 contain 60. This macro subs the base of each section from the value
923f08ff
AM		 2223 to give the true offset from the section. */
2224
2225#define MOVE_ADDRESS(ad) \
2226 if (r_extern) \
2227 { \
2228 /* Undefined symbol. */ \
2229 cache_ptr->sym_ptr_ptr = symbols + r_index; \
252b5132 2230 cache_ptr->addend = ad; \
252b5132 2231 } \
923f08ff
AM		 2232 else \
2233 { \
2234 /* Defined, section relative. Replace symbol with pointer to \
2235 symbol which points to section. */ \
2236 switch (r_index) \
2237 { \
2238 case N_TEXT: \
2239 case N_TEXT | N_EXT: \
2240 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2241 cache_ptr->addend = ad - su->textsec->vma; \
2242 break; \
2243 case N_DATA: \
2244 case N_DATA | N_EXT: \
2245 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2246 cache_ptr->addend = ad - su->datasec->vma; \
2247 break; \
2248 case N_BSS: \
2249 case N_BSS | N_EXT: \
2250 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2251 cache_ptr->addend = ad - su->bsssec->vma; \
2252 break; \
2253 default: \
2254 case N_ABS: \
2255 case N_ABS | N_EXT: \
2256 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2257 cache_ptr->addend = ad; \
2258 break; \
2259 } \
2260 }
252b5132
RH		 2261
2262void
2263NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2264 bfd *abfd;
2265 struct reloc_ext_external *bytes;
2266 arelent *cache_ptr;
2267 asymbol **symbols;
2268 bfd_size_type symcount;
2269{
2270 unsigned int r_index;
2271 int r_extern;
2272 unsigned int r_type;
2273 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2274
2275 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2276
f7c33884 2277 /* Now the fun stuff. */
923f08ff
AM		 2278 if (bfd_header_big_endian (abfd))
2279 {
d45913a0
DA		 2280 r_index = (((unsigned int) bytes->r_index[0] << 16)
2281 | ((unsigned int) bytes->r_index[1] << 8)
923f08ff
AM		 2282 | bytes->r_index[2]);
2283 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2284 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2285 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2286 }
2287 else
2288 {
d45913a0
DA		 2289 r_index = (((unsigned int) bytes->r_index[2] << 16)
2290 | ((unsigned int) bytes->r_index[1] << 8)
923f08ff
AM		 2291 | bytes->r_index[0]);
2292 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2293 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2294 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2295 }
252b5132
RH		 2296
2297 cache_ptr->howto = howto_table_ext + r_type;
2298
2299 /* Base relative relocs are always against the symbol table,
2300 regardless of the setting of r_extern. r_extern just reflects
2301 whether the symbol the reloc is against is local or global. */
d45913a0
DA		 2302 if (r_type == (unsigned int) RELOC_BASE10
2303 || r_type == (unsigned int) RELOC_BASE13
2304 || r_type == (unsigned int) RELOC_BASE22)
252b5132
RH		 2305 r_extern = 1;
2306
2307 if (r_extern && r_index > symcount)
2308 {
2309 /* We could arrange to return an error, but it might be useful
2310 to see the file even if it is bad. */
2311 r_extern = 0;
2312 r_index = N_ABS;
2313 }
2314
923f08ff 2315 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
252b5132
RH		 2316}
2317
2318void
2319NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2320 bfd *abfd;
2321 struct reloc_std_external *bytes;
2322 arelent *cache_ptr;
2323 asymbol **symbols;
2324 bfd_size_type symcount;
2325{
2326 unsigned int r_index;
2327 int r_extern;
2328 unsigned int r_length;
2329 int r_pcrel;
2330 int r_baserel, r_jmptable, r_relative;
2331 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2332 unsigned int howto_idx;
2333
dc810e39 2334 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
252b5132 2335
f7c33884 2336 /* Now the fun stuff. */
923f08ff
AM		 2337 if (bfd_header_big_endian (abfd))
2338 {
d45913a0
DA		 2339 r_index = (((unsigned int) bytes->r_index[0] << 16)
2340 | ((unsigned int) bytes->r_index[1] << 8)
923f08ff
AM		 2341 | bytes->r_index[2]);
2342 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2343 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2344 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2345 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2346 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2347 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2348 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2349 }
2350 else
2351 {
d45913a0
DA		 2352 r_index = (((unsigned int) bytes->r_index[2] << 16)
2353 | ((unsigned int) bytes->r_index[1] << 8)
923f08ff
AM		 2354 | bytes->r_index[0]);
2355 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2356 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2357 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2358 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2359 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2360 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2361 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2362 }
252b5132 2363
923f08ff
AM		 2364 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2365 + 16 * r_jmptable + 32 * r_relative);
252b5132
RH		 2366 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2367 cache_ptr->howto = howto_table_std + howto_idx;
2368 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2369
2370 /* Base relative relocs are always against the symbol table,
2371 regardless of the setting of r_extern. r_extern just reflects
2372 whether the symbol the reloc is against is local or global. */
2373 if (r_baserel)
2374 r_extern = 1;
2375
2376 if (r_extern && r_index > symcount)
2377 {
2378 /* We could arrange to return an error, but it might be useful
2379 to see the file even if it is bad. */
2380 r_extern = 0;
2381 r_index = N_ABS;
2382 }
2383
923f08ff 2384 MOVE_ADDRESS (0);
252b5132
RH		 2385}
2386
2387/* Read and swap the relocs for a section. */
2388
b34976b6 2389bfd_boolean
252b5132
RH		 2390NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2391 bfd *abfd;
2392 sec_ptr asect;
2393 asymbol **symbols;
2394{
dc810e39 2395 bfd_size_type count;
252b5132
RH		 2396 bfd_size_type reloc_size;
2397 PTR relocs;
2398 arelent *reloc_cache;
2399 size_t each_size;
2400 unsigned int counter = 0;
2401 arelent *cache_ptr;
dc810e39 2402 bfd_size_type amt;
252b5132
RH		 2403
2404 if (asect->relocation)
b34976b6 2405 return TRUE;
252b5132
RH		 2406
2407 if (asect->flags & SEC_CONSTRUCTOR)
b34976b6 2408 return TRUE;
252b5132
RH		 2409
2410 if (asect == obj_datasec (abfd))
923f08ff 2411 reloc_size = exec_hdr (abfd)->a_drsize;
252b5132 2412 else if (asect == obj_textsec (abfd))
923f08ff 2413 reloc_size = exec_hdr (abfd)->a_trsize;
252b5132
RH		 2414 else if (asect == obj_bsssec (abfd))
2415 reloc_size = 0;
2416 else
2417 {
2418 bfd_set_error (bfd_error_invalid_operation);
b34976b6 2419 return FALSE;
252b5132
RH		 2420 }
2421
2422 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
b34976b6 2423 return FALSE;
252b5132
RH		 2424
2425 each_size = obj_reloc_entry_size (abfd);
2426
2427 count = reloc_size / each_size;
2428
dc810e39 2429 amt = count * sizeof (arelent);
9bab7074 2430 reloc_cache = (arelent *) bfd_zmalloc (amt);
252b5132 2431 if (reloc_cache == NULL && count != 0)
b34976b6 2432 return FALSE;
252b5132 2433
dc810e39 2434 relocs = bfd_malloc (reloc_size);
252b5132
RH		 2435 if (relocs == NULL && reloc_size != 0)
2436 {
2437 free (reloc_cache);
b34976b6 2438 return FALSE;
252b5132
RH		 2439 }
2440
dc810e39 2441 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
252b5132
RH		 2442 {
2443 free (relocs);
2444 free (reloc_cache);
b34976b6 2445 return FALSE;
252b5132
RH		 2446 }
2447
2448 cache_ptr = reloc_cache;
2449 if (each_size == RELOC_EXT_SIZE)
2450 {
dc810e39 2451 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
252b5132
RH		 2452
2453 for (; counter < count; counter++, rptr++, cache_ptr++)
1642229e 2454 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
dc810e39 2455 (bfd_size_type) bfd_get_symcount (abfd));
252b5132
RH		 2456 }
2457 else
2458 {
dc810e39 2459 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
252b5132
RH		 2460
2461 for (; counter < count; counter++, rptr++, cache_ptr++)
2462 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
dc810e39 2463 (bfd_size_type) bfd_get_symcount (abfd));
252b5132
RH		 2464 }
2465
2466 free (relocs);
2467
2468 asect->relocation = reloc_cache;
2469 asect->reloc_count = cache_ptr - reloc_cache;
2470
b34976b6 2471 return TRUE;
252b5132
RH		 2472}
2473
2474/* Write out a relocation section into an object file. */
2475
b34976b6 2476bfd_boolean
252b5132
RH		 2477NAME(aout,squirt_out_relocs) (abfd, section)
2478 bfd *abfd;
2479 asection *section;
2480{
2481 arelent **generic;
2482 unsigned char *native, *natptr;
2483 size_t each_size;
2484
2485 unsigned int count = section->reloc_count;
dc810e39 2486 bfd_size_type natsize;
252b5132
RH		 2487
2488 if (count == 0 || section->orelocation == NULL)
b34976b6 2489 return TRUE;
252b5132
RH		 2490
2491 each_size = obj_reloc_entry_size (abfd);
dc810e39 2492 natsize = (bfd_size_type) each_size * count;
252b5132
RH		 2493 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2494 if (!native)
b34976b6 2495 return FALSE;
252b5132
RH		 2496
2497 generic = section->orelocation;
2498
2499 if (each_size == RELOC_EXT_SIZE)
2500 {
2501 for (natptr = native;
2502 count != 0;
2503 --count, natptr += each_size, ++generic)
1642229e
HPN		 2504 MY_swap_ext_reloc_out (abfd, *generic,
2505 (struct reloc_ext_external *) natptr);
252b5132
RH		 2506 }
2507 else
2508 {
2509 for (natptr = native;
2510 count != 0;
2511 --count, natptr += each_size, ++generic)
923f08ff
AM		 2512 MY_swap_std_reloc_out (abfd, *generic,
2513 (struct reloc_std_external *) natptr);
252b5132
RH		 2514 }
2515
dc810e39
AM		 2516 if (bfd_bwrite ((PTR) native, natsize, abfd) != natsize)
2517 {
923f08ff 2518 bfd_release (abfd, native);
b34976b6 2519 return FALSE;
dc810e39 2520 }
252b5132
RH		 2521 bfd_release (abfd, native);
2522
b34976b6 2523 return TRUE;
252b5132
RH		 2524}
2525
f7c33884
NC		 2526/* This is stupid. This function should be a boolean predicate. */
2527
252b5132
RH		 2528long
2529NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2530 bfd *abfd;
2531 sec_ptr section;
2532 arelent **relptr;
2533 asymbol **symbols;
2534{
2535 arelent *tblptr = section->relocation;
2536 unsigned int count;
2537
2538 if (section == obj_bsssec (abfd))
2539 {
2540 *relptr = NULL;
2541 return 0;
2542 }
2543
beb0d161 2544 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
252b5132
RH		 2545 return -1;
2546
923f08ff
AM		 2547 if (section->flags & SEC_CONSTRUCTOR)
2548 {
2549 arelent_chain *chain = section->constructor_chain;
2550 for (count = 0; count < section->reloc_count; count ++)
2551 {
2552 *relptr ++ = &chain->relent;
2553 chain = chain->next;
2554 }
252b5132 2555 }
923f08ff
AM		 2556 else
2557 {
2558 tblptr = section->relocation;
252b5132 2559
923f08ff
AM		 2560 for (count = 0; count++ < section->reloc_count; )
2561 {
2562 *relptr++ = tblptr++;
2563 }
2564 }
252b5132
RH		 2565 *relptr = 0;
2566
2567 return section->reloc_count;
2568}
2569
2570long
2571NAME(aout,get_reloc_upper_bound) (abfd, asect)
2572 bfd *abfd;
2573 sec_ptr asect;
2574{
923f08ff
AM		 2575 if (bfd_get_format (abfd) != bfd_object)
2576 {
2577 bfd_set_error (bfd_error_invalid_operation);
2578 return -1;
2579 }
f7c33884 2580
923f08ff 2581 if (asect->flags & SEC_CONSTRUCTOR)
f7c33884 2582 return (sizeof (arelent *) * (asect->reloc_count+1));
252b5132
RH		 2583
2584 if (asect == obj_datasec (abfd))
2585 return (sizeof (arelent *)
923f08ff 2586 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
252b5132
RH		 2587 + 1));
2588
2589 if (asect == obj_textsec (abfd))
2590 return (sizeof (arelent *)
923f08ff 2591 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
252b5132
RH		 2592 + 1));
2593
2594 if (asect == obj_bsssec (abfd))
2595 return sizeof (arelent *);
2596
2597 if (asect == obj_bsssec (abfd))
2598 return 0;
2599
2600 bfd_set_error (bfd_error_invalid_operation);
2601 return -1;
2602}
252b5132
RH		 2603\f
2604long
2605NAME(aout,get_symtab_upper_bound) (abfd)
2606 bfd *abfd;
2607{
beb0d161 2608 if (!NAME(aout,slurp_symbol_table) (abfd))
252b5132
RH		 2609 return -1;
2610
2611 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2612}
2613
1725a96e 2614alent *
252b5132 2615NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
7442e600
ILT		 2616 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2617 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
252b5132 2618{
7442e600 2619 return (alent *)NULL;
252b5132
RH		 2620}
2621
252b5132
RH		 2622void
2623NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
7442e600 2624 bfd *ignore_abfd ATTRIBUTE_UNUSED;
252b5132
RH		 2625 asymbol *symbol;
2626 symbol_info *ret;
2627{
2628 bfd_symbol_info (symbol, ret);
2629
2630 if (ret->type == '?')
2631 {
923f08ff 2632 int type_code = aout_symbol (symbol)->type & 0xff;
252b5132
RH		 2633 const char *stab_name = bfd_get_stab_name (type_code);
2634 static char buf[10];
2635
2636 if (stab_name == NULL)
2637 {
e60b52c6 2638 sprintf (buf, "(%d)", type_code);
252b5132
RH		 2639 stab_name = buf;
2640 }
2641 ret->type = '-';
2642 ret->stab_type = type_code;
923f08ff
AM		 2643 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2644 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
252b5132
RH		 2645 ret->stab_name = stab_name;
2646 }
2647}
2648
252b5132 2649void
60b89a18
L		 2650NAME(aout,print_symbol) (abfd, afile, symbol, how)
2651 bfd *abfd;
252b5132
RH		 2652 PTR afile;
2653 asymbol *symbol;
2654 bfd_print_symbol_type how;
2655{
2656 FILE *file = (FILE *)afile;
2657
923f08ff 2658 switch (how)
252b5132 2659 {
923f08ff
AM		 2660 case bfd_print_symbol_name:
2661 if (symbol->name)
2662 fprintf (file,"%s", symbol->name);
2663 break;
2664 case bfd_print_symbol_more:
2665 fprintf (file,"%4x %2x %2x",
2666 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2667 (unsigned) (aout_symbol (symbol)->other & 0xff),
2668 (unsigned) (aout_symbol (symbol)->type));
2669 break;
2670 case bfd_print_symbol_all:
2671 {
2672 const char *section_name = symbol->section->name;
252b5132 2673
923f08ff 2674 bfd_print_symbol_vandf (abfd, (PTR)file, symbol);
252b5132 2675
923f08ff
AM		 2676 fprintf (file," %-5s %04x %02x %02x",
2677 section_name,
2678 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2679 (unsigned) (aout_symbol (symbol)->other & 0xff),
2680 (unsigned) (aout_symbol (symbol)->type & 0xff));
2681 if (symbol->name)
2682 fprintf (file," %s", symbol->name);
2683 }
2684 break;
252b5132 2685 }
252b5132
RH		 2686}
2687
2688/* If we don't have to allocate more than 1MB to hold the generic
2689 symbols, we use the generic minisymbol methord: it's faster, since
2690 it only translates the symbols once, not multiple times. */
2691#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2692
2693/* Read minisymbols. For minisymbols, we use the unmodified a.out
2694 symbols. The minisymbol_to_symbol function translates these into
2695 BFD asymbol structures. */
2696
2697long
2698NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2699 bfd *abfd;
b34976b6 2700 bfd_boolean dynamic;
252b5132
RH		 2701 PTR *minisymsp;
2702 unsigned int *sizep;
2703{
2704 if (dynamic)
2705 {
2706 /* We could handle the dynamic symbols here as well, but it's
2707 easier to hand them off. */
2708 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2709 }
2710
2711 if (! aout_get_external_symbols (abfd))
2712 return -1;
2713
2714 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2715 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2716
2717 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2718
2719 /* By passing the external symbols back from this routine, we are
2720 giving up control over the memory block. Clear
2721 obj_aout_external_syms, so that we do not try to free it
2722 ourselves. */
2723 obj_aout_external_syms (abfd) = NULL;
2724
2725 *sizep = EXTERNAL_NLIST_SIZE;
2726 return obj_aout_external_sym_count (abfd);
2727}
2728
2729/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2730 unmodified a.out symbol. The SYM argument is a structure returned
2731 by bfd_make_empty_symbol, which we fill in here. */
2732
2733asymbol *
2734NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2735 bfd *abfd;
b34976b6 2736 bfd_boolean dynamic;
252b5132
RH		 2737 const PTR minisym;
2738 asymbol *sym;
2739{
2740 if (dynamic
2741 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2742 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2743
2744 memset (sym, 0, sizeof (aout_symbol_type));
2745
2746 /* We call translate_symbol_table to translate a single symbol. */
2747 if (! (NAME(aout,translate_symbol_table)
2748 (abfd,
2749 (aout_symbol_type *) sym,
2750 (struct external_nlist *) minisym,
2751 (bfd_size_type) 1,
2752 obj_aout_external_strings (abfd),
2753 obj_aout_external_string_size (abfd),
b34976b6 2754 FALSE)))
252b5132
RH		 2755 return NULL;
2756
2757 return sym;
2758}
2759
f7c33884
NC		 2760/* Provided a BFD, a section and an offset into the section, calculate
2761 and return the name of the source file and the line nearest to the
2762 wanted location. */
252b5132 2763
b34976b6 2764bfd_boolean
252b5132
RH		 2765NAME(aout,find_nearest_line)
2766 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2767 bfd *abfd;
2768 asection *section;
2769 asymbol **symbols;
2770 bfd_vma offset;
dc810e39
AM		 2771 const char **filename_ptr;
2772 const char **functionname_ptr;
252b5132
RH		 2773 unsigned int *line_ptr;
2774{
f7c33884 2775 /* Run down the file looking for the filename, function and linenumber. */
252b5132 2776 asymbol **p;
dc810e39
AM		 2777 const char *directory_name = NULL;
2778 const char *main_file_name = NULL;
2779 const char *current_file_name = NULL;
2780 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2781 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
252b5132
RH		 2782 bfd_vma low_line_vma = 0;
2783 bfd_vma low_func_vma = 0;
2784 asymbol *func = 0;
dc810e39 2785 bfd_size_type filelen, funclen;
252b5132
RH		 2786 char *buf;
2787
2788 *filename_ptr = abfd->filename;
2789 *functionname_ptr = 0;
2790 *line_ptr = 0;
f7c33884 2791
923f08ff
AM		 2792 if (symbols != (asymbol **)NULL)
2793 {
2794 for (p = symbols; *p; p++)
2795 {
2796 aout_symbol_type *q = (aout_symbol_type *) (*p);
2797 next:
2798 switch (q->type)
2799 {
2800 case N_TEXT:
2801 /* If this looks like a file name symbol, and it comes after
2802 the line number we have found so far, but before the
2803 offset, then we have probably not found the right line
2804 number. */
2805 if (q->symbol.value <= offset
2806 && ((q->symbol.value > low_line_vma
2807 && (line_file_name != NULL
2808 || *line_ptr != 0))
2809 || (q->symbol.value > low_func_vma
2810 && func != NULL)))
2811 {
2812 const char *symname;
252b5132 2813
923f08ff
AM		 2814 symname = q->symbol.name;
2815 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2816 {
2817 if (q->symbol.value > low_line_vma)
2818 {
2819 *line_ptr = 0;
2820 line_file_name = NULL;
2821 }
2822 if (q->symbol.value > low_func_vma)
2823 func = NULL;
2824 }
2825 }
2826 break;
252b5132 2827
923f08ff
AM		 2828 case N_SO:
2829 /* If this symbol is less than the offset, but greater than
2830 the line number we have found so far, then we have not
2831 found the right line number. */
2832 if (q->symbol.value <= offset)
2833 {
2834 if (q->symbol.value > low_line_vma)
2835 {
2836 *line_ptr = 0;
2837 line_file_name = NULL;
2838 }
2839 if (q->symbol.value > low_func_vma)
2840 func = NULL;
2841 }
252b5132 2842
923f08ff
AM		 2843 main_file_name = current_file_name = q->symbol.name;
2844 /* Look ahead to next symbol to check if that too is an N_SO. */
2845 p++;
2846 if (*p == NULL)
2847 break;
2848 q = (aout_symbol_type *) (*p);
2849 if (q->type != (int)N_SO)
2850 goto next;
2851
2852 /* Found a second N_SO First is directory; second is filename. */
2853 directory_name = current_file_name;
2854 main_file_name = current_file_name = q->symbol.name;
2855 if (obj_textsec (abfd) != section)
2856 goto done;
2857 break;
2858 case N_SOL:
2859 current_file_name = q->symbol.name;
2860 break;
252b5132 2861
923f08ff 2862 case N_SLINE:
252b5132 2863
923f08ff
AM		 2864 case N_DSLINE:
2865 case N_BSLINE:
2866 /* We'll keep this if it resolves nearer than the one we have
2867 already. */
2868 if (q->symbol.value >= low_line_vma
2869 && q->symbol.value <= offset)
2870 {
2871 *line_ptr = q->desc;
2872 low_line_vma = q->symbol.value;
2873 line_file_name = current_file_name;
2874 line_directory_name = directory_name;
2875 }
2876 break;
2877 case N_FUN:
2878 {
f7c33884 2879 /* We'll keep this if it is nearer than the one we have already. */
923f08ff 2880 if (q->symbol.value >= low_func_vma &&
f7c33884
NC		 2881 q->symbol.value <= offset)
2882 {
2883 low_func_vma = q->symbol.value;
2884 func = (asymbol *)q;
2885 }
923f08ff
AM		 2886 else if (q->symbol.value > offset)
2887 goto done;
2888 }
2889 break;
2890 }
252b5132 2891 }
252b5132 2892 }
252b5132
RH		 2893
2894 done:
2895 if (*line_ptr != 0)
2896 {
2897 main_file_name = line_file_name;
2898 directory_name = line_directory_name;
2899 }
2900
2901 if (main_file_name == NULL
5af11cab 2902 || IS_ABSOLUTE_PATH (main_file_name)
252b5132
RH		 2903 || directory_name == NULL)
2904 filelen = 0;
2905 else
2906 filelen = strlen (directory_name) + strlen (main_file_name);
f7c33884 2907
252b5132
RH		 2908 if (func == NULL)
2909 funclen = 0;
2910 else
2911 funclen = strlen (bfd_asymbol_name (func));
2912
2913 if (adata (abfd).line_buf != NULL)
2914 free (adata (abfd).line_buf);
f7c33884 2915
252b5132
RH		 2916 if (filelen + funclen == 0)
2917 adata (abfd).line_buf = buf = NULL;
2918 else
2919 {
2920 buf = (char *) bfd_malloc (filelen + funclen + 3);
2921 adata (abfd).line_buf = buf;
2922 if (buf == NULL)
b34976b6 2923 return FALSE;
252b5132
RH		 2924 }
2925
2926 if (main_file_name != NULL)
2927 {
5af11cab 2928 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
252b5132
RH		 2929 *filename_ptr = main_file_name;
2930 else
2931 {
2932 sprintf (buf, "%s%s", directory_name, main_file_name);
2933 *filename_ptr = buf;
2934 buf += filelen + 1;
2935 }
2936 }
2937
2938 if (func)
2939 {
2940 const char *function = func->name;
dc810e39 2941 char *colon;
252b5132
RH		 2942
2943 /* The caller expects a symbol name. We actually have a
2944 function name, without the leading underscore. Put the
2945 underscore back in, so that the caller gets a symbol name. */
2946 if (bfd_get_symbol_leading_char (abfd) == '\0')
2947 strcpy (buf, function);
2948 else
2949 {
2950 buf[0] = bfd_get_symbol_leading_char (abfd);
2951 strcpy (buf + 1, function);
2952 }
f7c33884 2953 /* Have to remove : stuff. */
dc810e39
AM		 2954 colon = strchr (buf, ':');
2955 if (colon != NULL)
2956 *colon = '\0';
252b5132
RH		 2957 *functionname_ptr = buf;
2958 }
2959
b34976b6 2960 return TRUE;
252b5132
RH		 2961}
2962
252b5132
RH		 2963int
2964NAME(aout,sizeof_headers) (abfd, execable)
2965 bfd *abfd;
b34976b6 2966 bfd_boolean execable ATTRIBUTE_UNUSED;
252b5132 2967{
923f08ff 2968 return adata (abfd).exec_bytes_size;
252b5132
RH		 2969}
2970
2971/* Free all information we have cached for this BFD. We can always
2972 read it again later if we need it. */
2973
b34976b6 2974bfd_boolean
252b5132
RH		 2975NAME(aout,bfd_free_cached_info) (abfd)
2976 bfd *abfd;
2977{
2978 asection *o;
2979
920581c5
L		 2980 if (bfd_get_format (abfd) != bfd_object
2981 || abfd->tdata.aout_data == NULL)
b34976b6 2982 return TRUE;
252b5132
RH		 2983
2984#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2985 BFCI_FREE (obj_aout_symbols (abfd));
2986#ifdef USE_MMAP
2987 obj_aout_external_syms (abfd) = 0;
2988 bfd_free_window (&obj_aout_sym_window (abfd));
2989 bfd_free_window (&obj_aout_string_window (abfd));
2990 obj_aout_external_strings (abfd) = 0;
2991#else
2992 BFCI_FREE (obj_aout_external_syms (abfd));
2993 BFCI_FREE (obj_aout_external_strings (abfd));
2994#endif
2995 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2996 BFCI_FREE (o->relocation);
2997#undef BFCI_FREE
2998
b34976b6 2999 return TRUE;
252b5132
RH		 3000}
3001\f
3002/* a.out link code. */
3003
b34976b6 3004static bfd_boolean aout_link_add_object_symbols
252b5132 3005 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6
AM		 3006static bfd_boolean aout_link_check_archive_element
3007 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *));
3008static bfd_boolean aout_link_free_symbols
3009 PARAMS ((bfd *));
3010static bfd_boolean aout_link_check_ar_symbols
3011 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *pneeded));
3012static bfd_boolean aout_link_add_symbols
252b5132
RH		 3013 PARAMS ((bfd *, struct bfd_link_info *));
3014
3015/* Routine to create an entry in an a.out link hash table. */
3016
3017struct bfd_hash_entry *
3018NAME(aout,link_hash_newfunc) (entry, table, string)
3019 struct bfd_hash_entry *entry;
3020 struct bfd_hash_table *table;
3021 const char *string;
3022{
3023 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
3024
3025 /* Allocate the structure if it has not already been allocated by a
3026 subclass. */
3027 if (ret == (struct aout_link_hash_entry *) NULL)
3028 ret = ((struct aout_link_hash_entry *)
3029 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
3030 if (ret == (struct aout_link_hash_entry *) NULL)
3031 return (struct bfd_hash_entry *) ret;
3032
3033 /* Call the allocation method of the superclass. */
3034 ret = ((struct aout_link_hash_entry *)
3035 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3036 table, string));
3037 if (ret)
3038 {
3039 /* Set local fields. */
b34976b6 3040 ret->written = FALSE;
252b5132
RH		 3041 ret->indx = -1;
3042 }
3043
3044 return (struct bfd_hash_entry *) ret;
3045}
3046
3047/* Initialize an a.out link hash table. */
3048
b34976b6 3049bfd_boolean
252b5132
RH		 3050NAME(aout,link_hash_table_init) (table, abfd, newfunc)
3051 struct aout_link_hash_table *table;
3052 bfd *abfd;
b34976b6
AM		 3053 struct bfd_hash_entry *(*newfunc)
3054 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
3055 const char *));
252b5132
RH		 3056{
3057 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
3058}
3059
3060/* Create an a.out link hash table. */
3061
3062struct bfd_link_hash_table *
3063NAME(aout,link_hash_table_create) (abfd)
3064 bfd *abfd;
3065{
3066 struct aout_link_hash_table *ret;
dc810e39 3067 bfd_size_type amt = sizeof (struct aout_link_hash_table);
252b5132 3068
5ed6aba4 3069 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
252b5132
RH		 3070 if (ret == NULL)
3071 return (struct bfd_link_hash_table *) NULL;
5ed6aba4 3072
252b5132
RH		 3073 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3074 NAME(aout,link_hash_newfunc)))
3075 {
3076 free (ret);
3077 return (struct bfd_link_hash_table *) NULL;
3078 }
3079 return &ret->root;
3080}
3081
3082/* Given an a.out BFD, add symbols to the global hash table as
3083 appropriate. */
3084
b34976b6 3085bfd_boolean
252b5132
RH		 3086NAME(aout,link_add_symbols) (abfd, info)
3087 bfd *abfd;
3088 struct bfd_link_info *info;
3089{
3090 switch (bfd_get_format (abfd))
3091 {
3092 case bfd_object:
3093 return aout_link_add_object_symbols (abfd, info);
3094 case bfd_archive:
3095 return _bfd_generic_link_add_archive_symbols
3096 (abfd, info, aout_link_check_archive_element);
3097 default:
3098 bfd_set_error (bfd_error_wrong_format);
b34976b6 3099 return FALSE;
252b5132
RH		 3100 }
3101}
3102
3103/* Add symbols from an a.out object file. */
3104
b34976b6 3105static bfd_boolean
252b5132
RH		 3106aout_link_add_object_symbols (abfd, info)
3107 bfd *abfd;
3108 struct bfd_link_info *info;
3109{
3110 if (! aout_get_external_symbols (abfd))
b34976b6 3111 return FALSE;
252b5132 3112 if (! aout_link_add_symbols (abfd, info))
b34976b6 3113 return FALSE;
252b5132
RH		 3114 if (! info->keep_memory)
3115 {
3116 if (! aout_link_free_symbols (abfd))
b34976b6 3117 return FALSE;
252b5132 3118 }
b34976b6 3119 return TRUE;
252b5132
RH		 3120}
3121
3122/* Check a single archive element to see if we need to include it in
3123 the link. *PNEEDED is set according to whether this element is
3124 needed in the link or not. This is called from
3125 _bfd_generic_link_add_archive_symbols. */
3126
b34976b6 3127static bfd_boolean
252b5132
RH		 3128aout_link_check_archive_element (abfd, info, pneeded)
3129 bfd *abfd;
3130 struct bfd_link_info *info;
b34976b6 3131 bfd_boolean *pneeded;
252b5132
RH		 3132{
3133 if (! aout_get_external_symbols (abfd))
b34976b6 3134 return FALSE;
252b5132
RH		 3135
3136 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
b34976b6 3137 return FALSE;
252b5132
RH		 3138
3139 if (*pneeded)
3140 {
3141 if (! aout_link_add_symbols (abfd, info))
b34976b6 3142 return FALSE;
252b5132
RH		 3143 }
3144
3145 if (! info->keep_memory || ! *pneeded)
3146 {
3147 if (! aout_link_free_symbols (abfd))
b34976b6 3148 return FALSE;
252b5132
RH		 3149 }
3150
b34976b6 3151 return TRUE;
252b5132
RH		 3152}
3153
3154/* Free up the internal symbols read from an a.out file. */
3155
b34976b6 3156static bfd_boolean
252b5132
RH		 3157aout_link_free_symbols (abfd)
3158 bfd *abfd;
3159{
3160 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3161 {
3162#ifdef USE_MMAP
3163 bfd_free_window (&obj_aout_sym_window (abfd));
3164#else
3165 free ((PTR) obj_aout_external_syms (abfd));
3166#endif
3167 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3168 }
3169 if (obj_aout_external_strings (abfd) != (char *) NULL)
3170 {
3171#ifdef USE_MMAP
3172 bfd_free_window (&obj_aout_string_window (abfd));
3173#else
3174 free ((PTR) obj_aout_external_strings (abfd));
3175#endif
3176 obj_aout_external_strings (abfd) = (char *) NULL;
3177 }
b34976b6 3178 return TRUE;
252b5132
RH		 3179}
3180
3181/* Look through the internal symbols to see if this object file should
3182 be included in the link. We should include this object file if it
3183 defines any symbols which are currently undefined. If this object
3184 file defines a common symbol, then we may adjust the size of the
3185 known symbol but we do not include the object file in the link
3186 (unless there is some other reason to include it). */
3187
b34976b6 3188static bfd_boolean
252b5132
RH		 3189aout_link_check_ar_symbols (abfd, info, pneeded)
3190 bfd *abfd;
3191 struct bfd_link_info *info;
b34976b6 3192 bfd_boolean *pneeded;
252b5132
RH		 3193{
3194 register struct external_nlist *p;
3195 struct external_nlist *pend;
3196 char *strings;
3197
b34976b6 3198 *pneeded = FALSE;
252b5132
RH		 3199
3200 /* Look through all the symbols. */
3201 p = obj_aout_external_syms (abfd);
3202 pend = p + obj_aout_external_sym_count (abfd);
3203 strings = obj_aout_external_strings (abfd);
3204 for (; p < pend; p++)
3205 {
dc810e39 3206 int type = H_GET_8 (abfd, p->e_type);
252b5132
RH		 3207 const char *name;
3208 struct bfd_link_hash_entry *h;
3209
3210 /* Ignore symbols that are not externally visible. This is an
3211 optimization only, as we check the type more thoroughly
3212 below. */
3213 if (((type & N_EXT) == 0
3214 || (type & N_STAB) != 0
3215 || type == N_FN)
3216 && type != N_WEAKA
3217 && type != N_WEAKT
3218 && type != N_WEAKD
3219 && type != N_WEAKB)
3220 {
3221 if (type == N_WARNING
3222 || type == N_INDR)
3223 ++p;
3224 continue;
3225 }
3226
3227 name = strings + GET_WORD (abfd, p->e_strx);
b34976b6 3228 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
252b5132
RH		 3229
3230 /* We are only interested in symbols that are currently
3231 undefined or common. */
3232 if (h == (struct bfd_link_hash_entry *) NULL
3233 || (h->type != bfd_link_hash_undefined
3234 && h->type != bfd_link_hash_common))
3235 {
3236 if (type == (N_INDR | N_EXT))
3237 ++p;
3238 continue;
3239 }
3240
3241 if (type == (N_TEXT | N_EXT)
3242 || type == (N_DATA | N_EXT)
3243 || type == (N_BSS | N_EXT)
3244 || type == (N_ABS | N_EXT)
3245 || type == (N_INDR | N_EXT))
3246 {
3247 /* This object file defines this symbol. We must link it
3248 in. This is true regardless of whether the current
f7c33884
NC		 3249 definition of the symbol is undefined or common.
3250
3251 If the current definition is common, we have a case in
3252 which we have already seen an object file including:
252b5132 3253 int a;
f7c33884 3254 and this object file from the archive includes:
252b5132 3255 int a = 5;
f7c33884
NC		 3256 In such a case, whether to include this object is target
3257 dependant for backward compatability.
252b5132
RH		 3258
3259 FIXME: The SunOS 4.1.3 linker will pull in the archive
3260 element if the symbol is defined in the .data section,
3261 but not if it is defined in the .text section. That
f7c33884
NC		 3262 seems a bit crazy to me, and it has not been implemented
3263 yet. However, it might be correct. */
3264 if (h->type == bfd_link_hash_common)
3265 {
3266 int skip = 0;
3267
3268 switch (info->common_skip_ar_aymbols)
3269 {
3270 case bfd_link_common_skip_text:
3271 skip = (type == (N_TEXT | N_EXT));
3272 break;
3273 case bfd_link_common_skip_data:
3274 skip = (type == (N_DATA | N_EXT));
3275 break;
3276 default:
3277 case bfd_link_common_skip_all:
3278 skip = 1;
3279 break;
3280 }
3281
3282 if (skip)
3283 continue;
3284 }
3285
252b5132 3286 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
b34976b6
AM		 3287 return FALSE;
3288 *pneeded = TRUE;
3289 return TRUE;
252b5132
RH		 3290 }
3291
3292 if (type == (N_UNDF | N_EXT))
3293 {
3294 bfd_vma value;
3295
3296 value = GET_WORD (abfd, p->e_value);
3297 if (value != 0)
3298 {
3299 /* This symbol is common in the object from the archive
3300 file. */
3301 if (h->type == bfd_link_hash_undefined)
3302 {
3303 bfd *symbfd;
3304 unsigned int power;
3305
3306 symbfd = h->u.undef.abfd;
3307 if (symbfd == (bfd *) NULL)
3308 {
3309 /* This symbol was created as undefined from
3310 outside BFD. We assume that we should link
3311 in the object file. This is done for the -u
3312 option in the linker. */
3313 if (! (*info->callbacks->add_archive_element) (info,
3314 abfd,
3315 name))
b34976b6
AM		 3316 return FALSE;
3317 *pneeded = TRUE;
3318 return TRUE;
252b5132
RH		 3319 }
3320 /* Turn the current link symbol into a common
3321 symbol. It is already on the undefs list. */
3322 h->type = bfd_link_hash_common;
3323 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3324 bfd_hash_allocate (&info->hash->table,
3325 sizeof (struct bfd_link_hash_common_entry)));
3326 if (h->u.c.p == NULL)
b34976b6 3327 return FALSE;
252b5132
RH		 3328
3329 h->u.c.size = value;
3330
3331 /* FIXME: This isn't quite right. The maximum
3332 alignment of a common symbol should be set by the
3333 architecture of the output file, not of the input
3334 file. */
3335 power = bfd_log2 (value);
3336 if (power > bfd_get_arch_info (abfd)->section_align_power)
3337 power = bfd_get_arch_info (abfd)->section_align_power;
3338 h->u.c.p->alignment_power = power;
3339
3340 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3341 "COMMON");
3342 }
3343 else
3344 {
3345 /* Adjust the size of the common symbol if
3346 necessary. */
3347 if (value > h->u.c.size)
3348 h->u.c.size = value;
3349 }
3350 }
3351 }
3352
3353 if (type == N_WEAKA
3354 || type == N_WEAKT
3355 || type == N_WEAKD
3356 || type == N_WEAKB)
3357 {
3358 /* This symbol is weak but defined. We must pull it in if
3359 the current link symbol is undefined, but we don't want
3360 it if the current link symbol is common. */
3361 if (h->type == bfd_link_hash_undefined)
3362 {
3363 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
b34976b6
AM		 3364 return FALSE;
3365 *pneeded = TRUE;
3366 return TRUE;
252b5132
RH		 3367 }
3368 }
3369 }
3370
3371 /* We do not need this object file. */
b34976b6 3372 return TRUE;
252b5132
RH		 3373}
3374
3375/* Add all symbols from an object file to the hash table. */
3376
b34976b6 3377static bfd_boolean
252b5132
RH		 3378aout_link_add_symbols (abfd, info)
3379 bfd *abfd;
3380 struct bfd_link_info *info;
3381{
b34976b6
AM		 3382 bfd_boolean (*add_one_symbol)
3383 PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
3384 bfd_vma, const char *, bfd_boolean, bfd_boolean,
3385 struct bfd_link_hash_entry **));
252b5132
RH		 3386 struct external_nlist *syms;
3387 bfd_size_type sym_count;
3388 char *strings;
b34976b6 3389 bfd_boolean copy;
252b5132
RH		 3390 struct aout_link_hash_entry **sym_hash;
3391 register struct external_nlist *p;
3392 struct external_nlist *pend;
dc810e39 3393 bfd_size_type amt;
252b5132
RH		 3394
3395 syms = obj_aout_external_syms (abfd);
3396 sym_count = obj_aout_external_sym_count (abfd);
3397 strings = obj_aout_external_strings (abfd);
3398 if (info->keep_memory)
b34976b6 3399 copy = FALSE;
252b5132 3400 else
b34976b6 3401 copy = TRUE;
252b5132
RH		 3402
3403 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3404 {
3405 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3406 (abfd, info, &syms, &sym_count, &strings)))
b34976b6 3407 return FALSE;
252b5132
RH		 3408 }
3409
3410 /* We keep a list of the linker hash table entries that correspond
3411 to particular symbols. We could just look them up in the hash
3412 table, but keeping the list is more efficient. Perhaps this
3413 should be conditional on info->keep_memory. */
dc810e39
AM		 3414 amt = sym_count * sizeof (struct aout_link_hash_entry *);
3415 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
252b5132 3416 if (sym_hash == NULL && sym_count != 0)
b34976b6 3417 return FALSE;
252b5132
RH		 3418 obj_aout_sym_hashes (abfd) = sym_hash;
3419
3420 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3421 if (add_one_symbol == NULL)
3422 add_one_symbol = _bfd_generic_link_add_one_symbol;
3423
3424 p = syms;
3425 pend = p + sym_count;
3426 for (; p < pend; p++, sym_hash++)
3427 {
3428 int type;
3429 const char *name;
3430 bfd_vma value;
3431 asection *section;
3432 flagword flags;
3433 const char *string;
3434
3435 *sym_hash = NULL;
3436
dc810e39 3437 type = H_GET_8 (abfd, p->e_type);
252b5132
RH		 3438
3439 /* Ignore debugging symbols. */
3440 if ((type & N_STAB) != 0)
3441 continue;
3442
3443 name = strings + GET_WORD (abfd, p->e_strx);
3444 value = GET_WORD (abfd, p->e_value);
3445 flags = BSF_GLOBAL;
3446 string = NULL;
3447 switch (type)
3448 {
3449 default:
3450 abort ();
3451
3452 case N_UNDF:
3453 case N_ABS:
3454 case N_TEXT:
3455 case N_DATA:
3456 case N_BSS:
3457 case N_FN_SEQ:
3458 case N_COMM:
3459 case N_SETV:
3460 case N_FN:
3461 /* Ignore symbols that are not externally visible. */
3462 continue;
3463 case N_INDR:
3464 /* Ignore local indirect symbol. */
3465 ++p;
3466 ++sym_hash;
3467 continue;
3468
3469 case N_UNDF | N_EXT:
3470 if (value == 0)
3471 {
3472 section = bfd_und_section_ptr;
3473 flags = 0;
3474 }
3475 else
3476 section = bfd_com_section_ptr;
3477 break;
3478 case N_ABS | N_EXT:
3479 section = bfd_abs_section_ptr;
3480 break;
3481 case N_TEXT | N_EXT:
3482 section = obj_textsec (abfd);
3483 value -= bfd_get_section_vma (abfd, section);
3484 break;
3485 case N_DATA | N_EXT:
3486 case N_SETV | N_EXT:
3487 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3488 translate_from_native_sym_flags. */
3489 section = obj_datasec (abfd);
3490 value -= bfd_get_section_vma (abfd, section);
3491 break;
3492 case N_BSS | N_EXT:
3493 section = obj_bsssec (abfd);
3494 value -= bfd_get_section_vma (abfd, section);
3495 break;
3496 case N_INDR | N_EXT:
3497 /* An indirect symbol. The next symbol is the symbol
3498 which this one really is. */
3499 BFD_ASSERT (p + 1 < pend);
3500 ++p;
3501 string = strings + GET_WORD (abfd, p->e_strx);
3502 section = bfd_ind_section_ptr;
3503 flags |= BSF_INDIRECT;
3504 break;
3505 case N_COMM | N_EXT:
3506 section = bfd_com_section_ptr;
3507 break;
3508 case N_SETA: case N_SETA | N_EXT:
3509 section = bfd_abs_section_ptr;
3510 flags |= BSF_CONSTRUCTOR;
3511 break;
3512 case N_SETT: case N_SETT | N_EXT:
3513 section = obj_textsec (abfd);
3514 flags |= BSF_CONSTRUCTOR;
3515 value -= bfd_get_section_vma (abfd, section);
3516 break;
3517 case N_SETD: case N_SETD | N_EXT:
3518 section = obj_datasec (abfd);
3519 flags |= BSF_CONSTRUCTOR;
3520 value -= bfd_get_section_vma (abfd, section);
3521 break;
3522 case N_SETB: case N_SETB | N_EXT:
3523 section = obj_bsssec (abfd);
3524 flags |= BSF_CONSTRUCTOR;
3525 value -= bfd_get_section_vma (abfd, section);
3526 break;
3527 case N_WARNING:
3528 /* A warning symbol. The next symbol is the one to warn
3529 about. */
3530 BFD_ASSERT (p + 1 < pend);
3531 ++p;
3532 string = name;
3533 name = strings + GET_WORD (abfd, p->e_strx);
3534 section = bfd_und_section_ptr;
3535 flags |= BSF_WARNING;
3536 break;
3537 case N_WEAKU:
3538 section = bfd_und_section_ptr;
3539 flags = BSF_WEAK;
3540 break;
3541 case N_WEAKA:
3542 section = bfd_abs_section_ptr;
3543 flags = BSF_WEAK;
3544 break;
3545 case N_WEAKT:
3546 section = obj_textsec (abfd);
3547 value -= bfd_get_section_vma (abfd, section);
3548 flags = BSF_WEAK;
3549 break;
3550 case N_WEAKD:
3551 section = obj_datasec (abfd);
3552 value -= bfd_get_section_vma (abfd, section);
3553 flags = BSF_WEAK;
3554 break;
3555 case N_WEAKB:
3556 section = obj_bsssec (abfd);
3557 value -= bfd_get_section_vma (abfd, section);
3558 flags = BSF_WEAK;
3559 break;
3560 }
3561
3562 if (! ((*add_one_symbol)
b34976b6 3563 (info, abfd, name, flags, section, value, string, copy, FALSE,
252b5132 3564 (struct bfd_link_hash_entry **) sym_hash)))
b34976b6 3565 return FALSE;
252b5132
RH		 3566
3567 /* Restrict the maximum alignment of a common symbol based on
3568 the architecture, since a.out has no way to represent
3569 alignment requirements of a section in a .o file. FIXME:
3570 This isn't quite right: it should use the architecture of the
3571 output file, not the input files. */
3572 if ((*sym_hash)->root.type == bfd_link_hash_common
3573 && ((*sym_hash)->root.u.c.p->alignment_power >
3574 bfd_get_arch_info (abfd)->section_align_power))
3575 (*sym_hash)->root.u.c.p->alignment_power =
3576 bfd_get_arch_info (abfd)->section_align_power;
3577
3578 /* If this is a set symbol, and we are not building sets, then
3579 it is possible for the hash entry to not have been set. In
3580 such a case, treat the symbol as not globally defined. */
3581 if ((*sym_hash)->root.type == bfd_link_hash_new)
3582 {
3583 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3584 *sym_hash = NULL;
3585 }
3586
3587 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3588 ++sym_hash;
3589 }
3590
b34976b6 3591 return TRUE;
252b5132
RH		 3592}
3593\f
3594/* A hash table used for header files with N_BINCL entries. */
3595
3596struct aout_link_includes_table
3597{
3598 struct bfd_hash_table root;
3599};
3600
3601/* A linked list of totals that we have found for a particular header
3602 file. */
3603
3604struct aout_link_includes_totals
3605{
3606 struct aout_link_includes_totals *next;
3607 bfd_vma total;
3608};
3609
3610/* An entry in the header file hash table. */
3611
3612struct aout_link_includes_entry
3613{
3614 struct bfd_hash_entry root;
3615 /* List of totals we have found for this file. */
3616 struct aout_link_includes_totals *totals;
3617};
3618
3619/* Look up an entry in an the header file hash table. */
3620
923f08ff
AM		 3621#define aout_link_includes_lookup(table, string, create, copy) \
3622 ((struct aout_link_includes_entry *) \
252b5132
RH		 3623 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3624
3625/* During the final link step we need to pass around a bunch of
3626 information, so we do it in an instance of this structure. */
3627
3628struct aout_final_link_info
3629{
3630 /* General link information. */
3631 struct bfd_link_info *info;
3632 /* Output bfd. */
3633 bfd *output_bfd;
3634 /* Reloc file positions. */
3635 file_ptr treloff, dreloff;
3636 /* File position of symbols. */
3637 file_ptr symoff;
3638 /* String table. */
3639 struct bfd_strtab_hash *strtab;
3640 /* Header file hash table. */
3641 struct aout_link_includes_table includes;
3642 /* A buffer large enough to hold the contents of any section. */
3643 bfd_byte *contents;
3644 /* A buffer large enough to hold the relocs of any section. */
3645 PTR relocs;
3646 /* A buffer large enough to hold the symbol map of any input BFD. */
3647 int *symbol_map;
3648 /* A buffer large enough to hold output symbols of any input BFD. */
3649 struct external_nlist *output_syms;
3650};
3651
3652static struct bfd_hash_entry *aout_link_includes_newfunc
3653 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
b34976b6 3654static bfd_boolean aout_link_input_bfd
252b5132 3655 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
b34976b6 3656static bfd_boolean aout_link_write_symbols
252b5132 3657 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
b34976b6 3658static bfd_boolean aout_link_write_other_symbol
252b5132 3659 PARAMS ((struct aout_link_hash_entry *, PTR));
b34976b6 3660static bfd_boolean aout_link_input_section
252b5132
RH		 3661 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3662 asection *input_section, file_ptr *reloff_ptr,
3663 bfd_size_type rel_size));
b34976b6 3664static bfd_boolean aout_link_input_section_std
252b5132
RH		 3665 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3666 asection *input_section, struct reloc_std_external *,
3667 bfd_size_type rel_size, bfd_byte *contents));
b34976b6 3668static bfd_boolean aout_link_input_section_ext
252b5132
RH		 3669 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3670 asection *input_section, struct reloc_ext_external *,
3671 bfd_size_type rel_size, bfd_byte *contents));
3672static INLINE asection *aout_reloc_index_to_section
3673 PARAMS ((bfd *, int));
b34976b6 3674static bfd_boolean aout_link_reloc_link_order
252b5132
RH		 3675 PARAMS ((struct aout_final_link_info *, asection *,
3676 struct bfd_link_order *));
3677
3678/* The function to create a new entry in the header file hash table. */
3679
3680static struct bfd_hash_entry *
3681aout_link_includes_newfunc (entry, table, string)
3682 struct bfd_hash_entry *entry;
3683 struct bfd_hash_table *table;
3684 const char *string;
3685{
3686 struct aout_link_includes_entry *ret =
3687 (struct aout_link_includes_entry *) entry;
3688
3689 /* Allocate the structure if it has not already been allocated by a
3690 subclass. */
3691 if (ret == (struct aout_link_includes_entry *) NULL)
3692 ret = ((struct aout_link_includes_entry *)
3693 bfd_hash_allocate (table,
3694 sizeof (struct aout_link_includes_entry)));
3695 if (ret == (struct aout_link_includes_entry *) NULL)
3696 return (struct bfd_hash_entry *) ret;
3697
3698 /* Call the allocation method of the superclass. */
3699 ret = ((struct aout_link_includes_entry *)
3700 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3701 if (ret)
3702 {
3703 /* Set local fields. */
3704 ret->totals = NULL;
3705 }
3706
3707 return (struct bfd_hash_entry *) ret;
3708}
3709
3710/* Do the final link step. This is called on the output BFD. The
3711 INFO structure should point to a list of BFDs linked through the
3712 link_next field which can be used to find each BFD which takes part
3713 in the output. Also, each section in ABFD should point to a list
3714 of bfd_link_order structures which list all the input sections for
3715 the output section. */
3716
b34976b6 3717bfd_boolean
252b5132
RH		 3718NAME(aout,final_link) (abfd, info, callback)
3719 bfd *abfd;
3720 struct bfd_link_info *info;
3721 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3722{
3723 struct aout_final_link_info aout_info;
b34976b6 3724 bfd_boolean includes_hash_initialized = FALSE;
252b5132
RH		 3725 register bfd *sub;
3726 bfd_size_type trsize, drsize;
dc810e39
AM		 3727 bfd_size_type max_contents_size;
3728 bfd_size_type max_relocs_size;
3729 bfd_size_type max_sym_count;
252b5132
RH		 3730 bfd_size_type text_size;
3731 file_ptr text_end;
3732 register struct bfd_link_order *p;
3733 asection *o;
b34976b6 3734 bfd_boolean have_link_order_relocs;
252b5132
RH		 3735
3736 if (info->shared)
3737 abfd->flags |= DYNAMIC;
3738
3739 aout_info.info = info;
3740 aout_info.output_bfd = abfd;
3741 aout_info.contents = NULL;
3742 aout_info.relocs = NULL;
3743 aout_info.symbol_map = NULL;
3744 aout_info.output_syms = NULL;
3745
3746 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3747 aout_link_includes_newfunc,
3748 251))
3749 goto error_return;
b34976b6 3750 includes_hash_initialized = TRUE;
252b5132
RH		 3751
3752 /* Figure out the largest section size. Also, if generating
1049f94e 3753 relocatable output, count the relocs. */
252b5132
RH		 3754 trsize = 0;
3755 drsize = 0;
3756 max_contents_size = 0;
3757 max_relocs_size = 0;
3758 max_sym_count = 0;
3759 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3760 {
dc810e39 3761 bfd_size_type sz;
252b5132 3762
1049f94e 3763 if (info->relocatable)
252b5132
RH		 3764 {
3765 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3766 {
3767 trsize += exec_hdr (sub)->a_trsize;
3768 drsize += exec_hdr (sub)->a_drsize;
3769 }
3770 else
3771 {
3772 /* FIXME: We need to identify the .text and .data sections
3773 and call get_reloc_upper_bound and canonicalize_reloc to
3774 work out the number of relocs needed, and then multiply
3775 by the reloc size. */
3776 (*_bfd_error_handler)
1049f94e 3777 (_("%s: relocatable link from %s to %s not supported"),
252b5132
RH		 3778 bfd_get_filename (abfd),
3779 sub->xvec->name, abfd->xvec->name);
3780 bfd_set_error (bfd_error_invalid_operation);
3781 goto error_return;
3782 }
3783 }
3784
3785 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3786 {
3787 sz = bfd_section_size (sub, obj_textsec (sub));
3788 if (sz > max_contents_size)
3789 max_contents_size = sz;
3790 sz = bfd_section_size (sub, obj_datasec (sub));
3791 if (sz > max_contents_size)
3792 max_contents_size = sz;
3793
3794 sz = exec_hdr (sub)->a_trsize;
3795 if (sz > max_relocs_size)
3796 max_relocs_size = sz;
3797 sz = exec_hdr (sub)->a_drsize;
3798 if (sz > max_relocs_size)
3799 max_relocs_size = sz;
3800
3801 sz = obj_aout_external_sym_count (sub);
3802 if (sz > max_sym_count)
3803 max_sym_count = sz;
3804 }
3805 }
3806
1049f94e 3807 if (info->relocatable)
252b5132
RH		 3808 {
3809 if (obj_textsec (abfd) != (asection *) NULL)
3810 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3811 ->link_order_head)
3812 * obj_reloc_entry_size (abfd));
3813 if (obj_datasec (abfd) != (asection *) NULL)
3814 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3815 ->link_order_head)
3816 * obj_reloc_entry_size (abfd));
3817 }
3818
3819 exec_hdr (abfd)->a_trsize = trsize;
3820 exec_hdr (abfd)->a_drsize = drsize;
3821
3822 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3823
3824 /* Adjust the section sizes and vmas according to the magic number.
3825 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3826 filepos for each section. */
3827 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3828 goto error_return;
3829
3830 /* The relocation and symbol file positions differ among a.out
3831 targets. We are passed a callback routine from the backend
3832 specific code to handle this.
3833 FIXME: At this point we do not know how much space the symbol
3834 table will require. This will not work for any (nonstandard)
3835 a.out target that needs to know the symbol table size before it
3836 can compute the relocation file positions. This may or may not
3837 be the case for the hp300hpux target, for example. */
3838 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3839 &aout_info.symoff);
3840 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3841 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3842 obj_sym_filepos (abfd) = aout_info.symoff;
3843
3844 /* We keep a count of the symbols as we output them. */
3845 obj_aout_external_sym_count (abfd) = 0;
3846
3847 /* We accumulate the string table as we write out the symbols. */
3848 aout_info.strtab = _bfd_stringtab_init ();
3849 if (aout_info.strtab == NULL)
3850 goto error_return;
3851
3852 /* Allocate buffers to hold section contents and relocs. */
3853 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3854 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3855 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3856 aout_info.output_syms = ((struct external_nlist *)
3857 bfd_malloc ((max_sym_count + 1)
3858 * sizeof (struct external_nlist)));
3859 if ((aout_info.contents == NULL && max_contents_size != 0)
3860 || (aout_info.relocs == NULL && max_relocs_size != 0)
3861 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3862 || aout_info.output_syms == NULL)
3863 goto error_return;
3864
3865 /* If we have a symbol named __DYNAMIC, force it out now. This is
3866 required by SunOS. Doing this here rather than in sunos.c is a
3867 hack, but it's easier than exporting everything which would be
3868 needed. */
3869 {
3870 struct aout_link_hash_entry *h;
3871
3872 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
b34976b6 3873 FALSE, FALSE, FALSE);
252b5132
RH		 3874 if (h != NULL)
3875 aout_link_write_other_symbol (h, &aout_info);
3876 }
3877
3878 /* The most time efficient way to do the link would be to read all
3879 the input object files into memory and then sort out the
3880 information into the output file. Unfortunately, that will
3881 probably use too much memory. Another method would be to step
3882 through everything that composes the text section and write it
3883 out, and then everything that composes the data section and write
3884 it out, and then write out the relocs, and then write out the
3885 symbols. Unfortunately, that requires reading stuff from each
3886 input file several times, and we will not be able to keep all the
3887 input files open simultaneously, and reopening them will be slow.
3888
3889 What we do is basically process one input file at a time. We do
3890 everything we need to do with an input file once--copy over the
3891 section contents, handle the relocation information, and write
3892 out the symbols--and then we throw away the information we read
3893 from it. This approach requires a lot of lseeks of the output
3894 file, which is unfortunate but still faster than reopening a lot
3895 of files.
3896
3897 We use the output_has_begun field of the input BFDs to see
3898 whether we have already handled it. */
3899 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
b34976b6 3900 sub->output_has_begun = FALSE;
252b5132
RH		 3901
3902 /* Mark all sections which are to be included in the link. This
3903 will normally be every section. We need to do this so that we
3904 can identify any sections which the linker has decided to not
3905 include. */
3906 for (o = abfd->sections; o != NULL; o = o->next)
3907 {
3908 for (p = o->link_order_head; p != NULL; p = p->next)
5ed6aba4
NC		 3909 if (p->type == bfd_indirect_link_order)
3910 p->u.indirect.section->linker_mark = TRUE;
252b5132
RH		 3911 }
3912
b34976b6 3913 have_link_order_relocs = FALSE;
252b5132
RH		 3914 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3915 {
3916 for (p = o->link_order_head;
3917 p != (struct bfd_link_order *) NULL;
3918 p = p->next)
3919 {
3920 if (p->type == bfd_indirect_link_order
3921 && (bfd_get_flavour (p->u.indirect.section->owner)
3922 == bfd_target_aout_flavour))
3923 {
3924 bfd *input_bfd;
3925
3926 input_bfd = p->u.indirect.section->owner;
3927 if (! input_bfd->output_has_begun)
3928 {
3929 if (! aout_link_input_bfd (&aout_info, input_bfd))
3930 goto error_return;
b34976b6 3931 input_bfd->output_has_begun = TRUE;
252b5132
RH		 3932 }
3933 }
3934 else if (p->type == bfd_section_reloc_link_order
3935 || p->type == bfd_symbol_reloc_link_order)
3936 {
3937 /* These are handled below. */
b34976b6 3938 have_link_order_relocs = TRUE;
252b5132
RH		 3939 }
3940 else
3941 {
3942 if (! _bfd_default_link_order (abfd, info, o, p))
3943 goto error_return;
3944 }
3945 }
3946 }
3947
3948 /* Write out any symbols that we have not already written out. */
3949 aout_link_hash_traverse (aout_hash_table (info),
3950 aout_link_write_other_symbol,
3951 (PTR) &aout_info);
3952
3953 /* Now handle any relocs we were asked to create by the linker.
3954 These did not come from any input file. We must do these after
3955 we have written out all the symbols, so that we know the symbol
3956 indices to use. */
3957 if (have_link_order_relocs)
3958 {
3959 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3960 {
3961 for (p = o->link_order_head;
3962 p != (struct bfd_link_order *) NULL;
3963 p = p->next)
3964 {
3965 if (p->type == bfd_section_reloc_link_order
3966 || p->type == bfd_symbol_reloc_link_order)
3967 {
3968 if (! aout_link_reloc_link_order (&aout_info, o, p))
3969 goto error_return;
3970 }
3971 }
3972 }
3973 }
3974
3975 if (aout_info.contents != NULL)
3976 {
3977 free (aout_info.contents);
3978 aout_info.contents = NULL;
3979 }
3980 if (aout_info.relocs != NULL)
3981 {
3982 free (aout_info.relocs);
3983 aout_info.relocs = NULL;
3984 }
3985 if (aout_info.symbol_map != NULL)
3986 {
3987 free (aout_info.symbol_map);
3988 aout_info.symbol_map = NULL;
3989 }
3990 if (aout_info.output_syms != NULL)
3991 {
3992 free (aout_info.output_syms);
3993 aout_info.output_syms = NULL;
3994 }
3995 if (includes_hash_initialized)
3996 {
3997 bfd_hash_table_free (&aout_info.includes.root);
b34976b6 3998 includes_hash_initialized = FALSE;
252b5132
RH		 3999 }
4000
4001 /* Finish up any dynamic linking we may be doing. */
4002 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
4003 {
4004 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
4005 goto error_return;
4006 }
4007
4008 /* Update the header information. */
4009 abfd->symcount = obj_aout_external_sym_count (abfd);
4010 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
4011 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
4012 obj_textsec (abfd)->reloc_count =
4013 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
4014 obj_datasec (abfd)->reloc_count =
4015 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
4016
4017 /* Write out the string table, unless there are no symbols. */
4018 if (abfd->symcount > 0)
4019 {
4020 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
4021 || ! emit_stringtab (abfd, aout_info.strtab))
4022 goto error_return;
4023 }
4024 else if (obj_textsec (abfd)->reloc_count == 0
4025 && obj_datasec (abfd)->reloc_count == 0)
4026 {
4027 bfd_byte b;
dc810e39 4028 file_ptr pos;
252b5132
RH		 4029
4030 b = 0;
dc810e39
AM		 4031 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1;
4032 if (bfd_seek (abfd, pos, SEEK_SET) != 0
4033 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
252b5132
RH		 4034 goto error_return;
4035 }
4036
b34976b6 4037 return TRUE;
252b5132
RH		 4038
4039 error_return:
4040 if (aout_info.contents != NULL)
4041 free (aout_info.contents);
4042 if (aout_info.relocs != NULL)
4043 free (aout_info.relocs);
4044 if (aout_info.symbol_map != NULL)
4045 free (aout_info.symbol_map);
4046 if (aout_info.output_syms != NULL)
4047 free (aout_info.output_syms);
4048 if (includes_hash_initialized)
4049 bfd_hash_table_free (&aout_info.includes.root);
b34976b6 4050 return FALSE;
252b5132
RH		 4051}
4052
4053/* Link an a.out input BFD into the output file. */
4054
b34976b6 4055static bfd_boolean
252b5132
RH		 4056aout_link_input_bfd (finfo, input_bfd)
4057 struct aout_final_link_info *finfo;
4058 bfd *input_bfd;
4059{
4060 bfd_size_type sym_count;
4061
4062 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
4063
4064 /* If this is a dynamic object, it may need special handling. */
4065 if ((input_bfd->flags & DYNAMIC) != 0
4066 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
4067 {
4068 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
4069 (finfo->info, input_bfd));
4070 }
4071
4072 /* Get the symbols. We probably have them already, unless
b34976b6 4073 finfo->info->keep_memory is FALSE. */
252b5132 4074 if (! aout_get_external_symbols (input_bfd))
b34976b6 4075 return FALSE;
252b5132
RH		 4076
4077 sym_count = obj_aout_external_sym_count (input_bfd);
4078
4079 /* Write out the symbols and get a map of the new indices. The map
4080 is placed into finfo->symbol_map. */
4081 if (! aout_link_write_symbols (finfo, input_bfd))
b34976b6 4082 return FALSE;
252b5132
RH		 4083
4084 /* Relocate and write out the sections. These functions use the
4085 symbol map created by aout_link_write_symbols. The linker_mark
4086 field will be set if these sections are to be included in the
4087 link, which will normally be the case. */
4088 if (obj_textsec (input_bfd)->linker_mark)
4089 {
4090 if (! aout_link_input_section (finfo, input_bfd,
4091 obj_textsec (input_bfd),
4092 &finfo->treloff,
4093 exec_hdr (input_bfd)->a_trsize))
b34976b6 4094 return FALSE;
252b5132
RH		 4095 }
4096 if (obj_datasec (input_bfd)->linker_mark)
4097 {
4098 if (! aout_link_input_section (finfo, input_bfd,
4099 obj_datasec (input_bfd),
4100 &finfo->dreloff,
4101 exec_hdr (input_bfd)->a_drsize))
b34976b6 4102 return FALSE;
252b5132
RH		 4103 }
4104
4105 /* If we are not keeping memory, we don't need the symbols any
4106 longer. We still need them if we are keeping memory, because the
4107 strings in the hash table point into them. */
4108 if (! finfo->info->keep_memory)
4109 {
4110 if (! aout_link_free_symbols (input_bfd))
b34976b6 4111 return FALSE;
252b5132
RH		 4112 }
4113
b34976b6 4114 return TRUE;
252b5132
RH		 4115}
4116
4117/* Adjust and write out the symbols for an a.out file. Set the new
4118 symbol indices into a symbol_map. */
4119
b34976b6 4120static bfd_boolean
252b5132
RH		 4121aout_link_write_symbols (finfo, input_bfd)
4122 struct aout_final_link_info *finfo;
4123 bfd *input_bfd;
4124{
4125 bfd *output_bfd;
4126 bfd_size_type sym_count;
4127 char *strings;
4128 enum bfd_link_strip strip;
4129 enum bfd_link_discard discard;
4130 struct external_nlist *outsym;
4131 bfd_size_type strtab_index;
4132 register struct external_nlist *sym;
4133 struct external_nlist *sym_end;
4134 struct aout_link_hash_entry **sym_hash;
4135 int *symbol_map;
b34976b6
AM		 4136 bfd_boolean pass;
4137 bfd_boolean skip_next;
252b5132
RH		 4138
4139 output_bfd = finfo->output_bfd;
4140 sym_count = obj_aout_external_sym_count (input_bfd);
4141 strings = obj_aout_external_strings (input_bfd);
4142 strip = finfo->info->strip;
4143 discard = finfo->info->discard;
4144 outsym = finfo->output_syms;
4145
4146 /* First write out a symbol for this object file, unless we are
4147 discarding such symbols. */
4148 if (strip != strip_all
4149 && (strip != strip_some
4150 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
b34976b6 4151 FALSE, FALSE) != NULL)
252b5132
RH		 4152 && discard != discard_all)
4153 {
dc810e39
AM		 4154 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4155 H_PUT_8 (output_bfd, 0, outsym->e_other);
4156 H_PUT_16 (output_bfd, 0, outsym->e_desc);
252b5132 4157 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
b34976b6 4158 input_bfd->filename, FALSE);
252b5132 4159 if (strtab_index == (bfd_size_type) -1)
b34976b6 4160 return FALSE;
252b5132
RH		 4161 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4162 PUT_WORD (output_bfd,
4163 (bfd_get_section_vma (output_bfd,
4164 obj_textsec (input_bfd)->output_section)
4165 + obj_textsec (input_bfd)->output_offset),
4166 outsym->e_value);
4167 ++obj_aout_external_sym_count (output_bfd);
4168 ++outsym;
4169 }
4170
b34976b6
AM		 4171 pass = FALSE;
4172 skip_next = FALSE;
252b5132
RH		 4173 sym = obj_aout_external_syms (input_bfd);
4174 sym_end = sym + sym_count;
4175 sym_hash = obj_aout_sym_hashes (input_bfd);
4176 symbol_map = finfo->symbol_map;
dc810e39 4177 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
252b5132
RH		 4178 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4179 {
4180 const char *name;
4181 int type;
4182 struct aout_link_hash_entry *h;
b34976b6 4183 bfd_boolean skip;
252b5132
RH		 4184 asection *symsec;
4185 bfd_vma val = 0;
b34976b6 4186 bfd_boolean copy;
252b5132
RH		 4187
4188 /* We set *symbol_map to 0 above for all symbols. If it has
4189 already been set to -1 for this symbol, it means that we are
4190 discarding it because it appears in a duplicate header file.
4191 See the N_BINCL code below. */
4192 if (*symbol_map == -1)
4193 continue;
4194
4195 /* Initialize *symbol_map to -1, which means that the symbol was
4196 not copied into the output file. We will change it later if
4197 we do copy the symbol over. */
4198 *symbol_map = -1;
4199
dc810e39 4200 type = H_GET_8 (input_bfd, sym->e_type);
252b5132
RH		 4201 name = strings + GET_WORD (input_bfd, sym->e_strx);
4202
4203 h = NULL;
4204
4205 if (pass)
4206 {
4207 /* Pass this symbol through. It is the target of an
4208 indirect or warning symbol. */
4209 val = GET_WORD (input_bfd, sym->e_value);
b34976b6 4210 pass = FALSE;
252b5132
RH		 4211 }
4212 else if (skip_next)
4213 {
4214 /* Skip this symbol, which is the target of an indirect
4215 symbol that we have changed to no longer be an indirect
4216 symbol. */
b34976b6 4217 skip_next = FALSE;
252b5132
RH		 4218 continue;
4219 }
4220 else
4221 {
4222 struct aout_link_hash_entry *hresolve;
4223
4224 /* We have saved the hash table entry for this symbol, if
4225 there is one. Note that we could just look it up again
4226 in the hash table, provided we first check that it is an
0ef5a5bd 4227 external symbol. */
252b5132
RH		 4228 h = *sym_hash;
4229
4230 /* Use the name from the hash table, in case the symbol was
4231 wrapped. */
0f3bd64f
AM		 4232 if (h != NULL
4233 && h->root.type != bfd_link_hash_warning)
252b5132
RH		 4234 name = h->root.root.string;
4235
4236 /* If this is an indirect or warning symbol, then change
4237 hresolve to the base symbol. We also change *sym_hash so
4238 that the relocation routines relocate against the real
4239 symbol. */
4240 hresolve = h;
4241 if (h != (struct aout_link_hash_entry *) NULL
4242 && (h->root.type == bfd_link_hash_indirect
4243 || h->root.type == bfd_link_hash_warning))
4244 {
4245 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4246 while (hresolve->root.type == bfd_link_hash_indirect
4247 || hresolve->root.type == bfd_link_hash_warning)
4248 hresolve = ((struct aout_link_hash_entry *)
4249 hresolve->root.u.i.link);
4250 *sym_hash = hresolve;
4251 }
4252
4253 /* If the symbol has already been written out, skip it. */
4254 if (h != (struct aout_link_hash_entry *) NULL
252b5132
RH		 4255 && h->written)
4256 {
4257 if ((type & N_TYPE) == N_INDR
4258 || type == N_WARNING)
b34976b6 4259 skip_next = TRUE;
252b5132
RH		 4260 *symbol_map = h->indx;
4261 continue;
4262 }
4263
4264 /* See if we are stripping this symbol. */
b34976b6 4265 skip = FALSE;
252b5132
RH		 4266 switch (strip)
4267 {
4268 case strip_none:
4269 break;
4270 case strip_debugger:
4271 if ((type & N_STAB) != 0)
b34976b6 4272 skip = TRUE;
252b5132
RH		 4273 break;
4274 case strip_some:
b34976b6 4275 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
252b5132 4276 == NULL)
b34976b6 4277 skip = TRUE;
252b5132
RH		 4278 break;
4279 case strip_all:
b34976b6 4280 skip = TRUE;
252b5132
RH		 4281 break;
4282 }
4283 if (skip)
4284 {
4285 if (h != (struct aout_link_hash_entry *) NULL)
b34976b6 4286 h->written = TRUE;
252b5132
RH		 4287 continue;
4288 }
4289
4290 /* Get the value of the symbol. */
4291 if ((type & N_TYPE) == N_TEXT
4292 || type == N_WEAKT)
4293 symsec = obj_textsec (input_bfd);
4294 else if ((type & N_TYPE) == N_DATA
4295 || type == N_WEAKD)
4296 symsec = obj_datasec (input_bfd);
4297 else if ((type & N_TYPE) == N_BSS
4298 || type == N_WEAKB)
4299 symsec = obj_bsssec (input_bfd);
4300 else if ((type & N_TYPE) == N_ABS
4301 || type == N_WEAKA)
4302 symsec = bfd_abs_section_ptr;
4303 else if (((type & N_TYPE) == N_INDR
4304 && (hresolve == (struct aout_link_hash_entry *) NULL
4305 || (hresolve->root.type != bfd_link_hash_defined
4306 && hresolve->root.type != bfd_link_hash_defweak
4307 && hresolve->root.type != bfd_link_hash_common)))
4308 || type == N_WARNING)
4309 {
4310 /* Pass the next symbol through unchanged. The
4311 condition above for indirect symbols is so that if
4312 the indirect symbol was defined, we output it with
4313 the correct definition so the debugger will
4314 understand it. */
b34976b6 4315 pass = TRUE;
252b5132
RH		 4316 val = GET_WORD (input_bfd, sym->e_value);
4317 symsec = NULL;
4318 }
4319 else if ((type & N_STAB) != 0)
4320 {
4321 val = GET_WORD (input_bfd, sym->e_value);
4322 symsec = NULL;
4323 }
4324 else
4325 {
4326 /* If we get here with an indirect symbol, it means that
4327 we are outputting it with a real definition. In such
4328 a case we do not want to output the next symbol,
4329 which is the target of the indirection. */
4330 if ((type & N_TYPE) == N_INDR)
b34976b6 4331 skip_next = TRUE;
252b5132
RH		 4332
4333 symsec = NULL;
4334
4335 /* We need to get the value from the hash table. We use
4336 hresolve so that if we have defined an indirect
4337 symbol we output the final definition. */
4338 if (h == (struct aout_link_hash_entry *) NULL)
4339 {
4340 switch (type & N_TYPE)
4341 {
4342 case N_SETT:
4343 symsec = obj_textsec (input_bfd);
4344 break;
4345 case N_SETD:
4346 symsec = obj_datasec (input_bfd);
4347 break;
4348 case N_SETB:
4349 symsec = obj_bsssec (input_bfd);
4350 break;
4351 case N_SETA:
4352 symsec = bfd_abs_section_ptr;
4353 break;
4354 default:
4355 val = 0;
4356 break;
4357 }
4358 }
4359 else if (hresolve->root.type == bfd_link_hash_defined
4360 || hresolve->root.type == bfd_link_hash_defweak)
4361 {
4362 asection *input_section;
4363 asection *output_section;
4364
4365 /* This case usually means a common symbol which was
4366 turned into a defined symbol. */
4367 input_section = hresolve->root.u.def.section;
4368 output_section = input_section->output_section;
4369 BFD_ASSERT (bfd_is_abs_section (output_section)
4370 || output_section->owner == output_bfd);
4371 val = (hresolve->root.u.def.value
4372 + bfd_get_section_vma (output_bfd, output_section)
4373 + input_section->output_offset);
4374
4375 /* Get the correct type based on the section. If
4376 this is a constructed set, force it to be
4377 globally visible. */
4378 if (type == N_SETT
4379 || type == N_SETD
4380 || type == N_SETB
4381 || type == N_SETA)
4382 type |= N_EXT;
4383
4384 type &=~ N_TYPE;
4385
4386 if (output_section == obj_textsec (output_bfd))
4387 type |= (hresolve->root.type == bfd_link_hash_defined
4388 ? N_TEXT
4389 : N_WEAKT);
4390 else if (output_section == obj_datasec (output_bfd))
4391 type |= (hresolve->root.type == bfd_link_hash_defined
4392 ? N_DATA
4393 : N_WEAKD);
4394 else if (output_section == obj_bsssec (output_bfd))
4395 type |= (hresolve->root.type == bfd_link_hash_defined
4396 ? N_BSS
4397 : N_WEAKB);
4398 else
4399 type |= (hresolve->root.type == bfd_link_hash_defined
4400 ? N_ABS
4401 : N_WEAKA);
4402 }
4403 else if (hresolve->root.type == bfd_link_hash_common)
4404 val = hresolve->root.u.c.size;
4405 else if (hresolve->root.type == bfd_link_hash_undefweak)
4406 {
4407 val = 0;
4408 type = N_WEAKU;
4409 }
4410 else
4411 val = 0;
4412 }
4413 if (symsec != (asection *) NULL)
4414 val = (symsec->output_section->vma
4415 + symsec->output_offset
4416 + (GET_WORD (input_bfd, sym->e_value)
4417 - symsec->vma));
4418
4419 /* If this is a global symbol set the written flag, and if
4420 it is a local symbol see if we should discard it. */
4421 if (h != (struct aout_link_hash_entry *) NULL)
4422 {
b34976b6 4423 h->written = TRUE;
252b5132
RH		 4424 h->indx = obj_aout_external_sym_count (output_bfd);
4425 }
4426 else if ((type & N_TYPE) != N_SETT
4427 && (type & N_TYPE) != N_SETD
4428 && (type & N_TYPE) != N_SETB
4429 && (type & N_TYPE) != N_SETA)
4430 {
4431 switch (discard)
4432 {
4433 case discard_none:
f5fa8ca2 4434 case discard_sec_merge:
252b5132
RH		 4435 break;
4436 case discard_l:
4437 if ((type & N_STAB) == 0
4438 && bfd_is_local_label_name (input_bfd, name))
b34976b6 4439 skip = TRUE;
252b5132
RH		 4440 break;
4441 case discard_all:
b34976b6 4442 skip = TRUE;
252b5132
RH		 4443 break;
4444 }
4445 if (skip)
4446 {
b34976b6 4447 pass = FALSE;
252b5132
RH		 4448 continue;
4449 }
4450 }
4451
4452 /* An N_BINCL symbol indicates the start of the stabs
4453 entries for a header file. We need to scan ahead to the
4454 next N_EINCL symbol, ignoring nesting, adding up all the
4455 characters in the symbol names, not including the file
4456 numbers in types (the first number after an open
4457 parenthesis). */
d45913a0 4458 if (type == (int) N_BINCL)
252b5132
RH		 4459 {
4460 struct external_nlist *incl_sym;
4461 int nest;
4462 struct aout_link_includes_entry *incl_entry;
4463 struct aout_link_includes_totals *t;
4464
4465 val = 0;
4466 nest = 0;
4467 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4468 {
4469 int incl_type;
4470
dc810e39 4471 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
d45913a0 4472 if (incl_type == (int) N_EINCL)
252b5132
RH		 4473 {
4474 if (nest == 0)
4475 break;
4476 --nest;
4477 }
d45913a0 4478 else if (incl_type == (int) N_BINCL)
252b5132
RH		 4479 ++nest;
4480 else if (nest == 0)
4481 {
4482 const char *s;
4483
4484 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4485 for (; *s != '\0'; s++)
4486 {
4487 val += *s;
4488 if (*s == '(')
4489 {
4490 /* Skip the file number. */
4491 ++s;
3882b010 4492 while (ISDIGIT (*s))
252b5132
RH		 4493 ++s;
4494 --s;
4495 }
4496 }
4497 }
4498 }
4499
4500 /* If we have already included a header file with the
4501 same value, then replace this one with an N_EXCL
4502 symbol. */
b34976b6 4503 copy = (bfd_boolean) (! finfo->info->keep_memory);
252b5132 4504 incl_entry = aout_link_includes_lookup (&finfo->includes,
b34976b6 4505 name, TRUE, copy);
252b5132 4506 if (incl_entry == NULL)
b34976b6 4507 return FALSE;
252b5132
RH		 4508 for (t = incl_entry->totals; t != NULL; t = t->next)
4509 if (t->total == val)
4510 break;
4511 if (t == NULL)
4512 {
4513 /* This is the first time we have seen this header
4514 file with this set of stabs strings. */
4515 t = ((struct aout_link_includes_totals *)
4516 bfd_hash_allocate (&finfo->includes.root,
4517 sizeof *t));
4518 if (t == NULL)
b34976b6 4519 return FALSE;
252b5132
RH		 4520 t->total = val;
4521 t->next = incl_entry->totals;
4522 incl_entry->totals = t;
4523 }
4524 else
4525 {
4526 int *incl_map;
4527
4528 /* This is a duplicate header file. We must change
4529 it to be an N_EXCL entry, and mark all the
4530 included symbols to prevent outputting them. */
d45913a0 4531 type = (int) N_EXCL;
252b5132
RH		 4532
4533 nest = 0;
4534 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4535 incl_sym < sym_end;
4536 incl_sym++, incl_map++)
4537 {
4538 int incl_type;
4539
dc810e39 4540 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
d45913a0 4541 if (incl_type == (int) N_EINCL)
252b5132
RH		 4542 {
4543 if (nest == 0)
4544 {
4545 *incl_map = -1;
4546 break;
4547 }
4548 --nest;
4549 }
d45913a0 4550 else if (incl_type == (int) N_BINCL)
252b5132
RH		 4551 ++nest;
4552 else if (nest == 0)
4553 *incl_map = -1;
4554 }
4555 }
4556 }
4557 }
4558
4559 /* Copy this symbol into the list of symbols we are going to
4560 write out. */
dc810e39
AM		 4561 H_PUT_8 (output_bfd, type, outsym->e_type);
4562 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
4563 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
b34976b6 4564 copy = FALSE;
252b5132
RH		 4565 if (! finfo->info->keep_memory)
4566 {
4567 /* name points into a string table which we are going to
4568 free. If there is a hash table entry, use that string.
4569 Otherwise, copy name into memory. */
4570 if (h != (struct aout_link_hash_entry *) NULL)
4571 name = h->root.root.string;
4572 else
b34976b6 4573 copy = TRUE;
252b5132
RH		 4574 }
4575 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4576 name, copy);
4577 if (strtab_index == (bfd_size_type) -1)
b34976b6 4578 return FALSE;
252b5132
RH		 4579 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4580 PUT_WORD (output_bfd, val, outsym->e_value);
4581 *symbol_map = obj_aout_external_sym_count (output_bfd);
4582 ++obj_aout_external_sym_count (output_bfd);
4583 ++outsym;
4584 }
4585
4586 /* Write out the output symbols we have just constructed. */
4587 if (outsym > finfo->output_syms)
4588 {
dc810e39 4589 bfd_size_type outsym_size;
252b5132
RH		 4590
4591 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
b34976b6 4592 return FALSE;
dc810e39
AM		 4593 outsym_size = outsym - finfo->output_syms;
4594 outsym_size *= EXTERNAL_NLIST_SIZE;
4595 if (bfd_bwrite ((PTR) finfo->output_syms, outsym_size, output_bfd)
4596 != outsym_size)
b34976b6 4597 return FALSE;
dc810e39 4598 finfo->symoff += outsym_size;
252b5132
RH		 4599 }
4600
b34976b6 4601 return TRUE;
252b5132
RH		 4602}
4603
4604/* Write out a symbol that was not associated with an a.out input
4605 object. */
4606
b34976b6 4607static bfd_boolean
252b5132
RH		 4608aout_link_write_other_symbol (h, data)
4609 struct aout_link_hash_entry *h;
4610 PTR data;
4611{
4612 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4613 bfd *output_bfd;
4614 int type;
4615 bfd_vma val;
4616 struct external_nlist outsym;
4617 bfd_size_type indx;
dc810e39 4618 bfd_size_type amt;
252b5132 4619
e92d460e
AM		 4620 if (h->root.type == bfd_link_hash_warning)
4621 {
4622 h = (struct aout_link_hash_entry *) h->root.u.i.link;
4623 if (h->root.type == bfd_link_hash_new)
b34976b6 4624 return TRUE;
e92d460e
AM		 4625 }
4626
252b5132
RH		 4627 output_bfd = finfo->output_bfd;
4628
4629 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4630 {
4631 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4632 (output_bfd, finfo->info, h)))
4633 {
4634 /* FIXME: No way to handle errors. */
4635 abort ();
4636 }
4637 }
4638
4639 if (h->written)
b34976b6 4640 return TRUE;
252b5132 4641
b34976b6 4642 h->written = TRUE;
252b5132
RH		 4643
4644 /* An indx of -2 means the symbol must be written. */
4645 if (h->indx != -2
4646 && (finfo->info->strip == strip_all
4647 || (finfo->info->strip == strip_some
4648 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
b34976b6
AM		 4649 FALSE, FALSE) == NULL)))
4650 return TRUE;
252b5132
RH		 4651
4652 switch (h->root.type)
4653 {
4654 default:
e92d460e 4655 case bfd_link_hash_warning:
252b5132
RH		 4656 abort ();
4657 /* Avoid variable not initialized warnings. */
b34976b6 4658 return TRUE;
252b5132
RH		 4659 case bfd_link_hash_new:
4660 /* This can happen for set symbols when sets are not being
4661 built. */
b34976b6 4662 return TRUE;
252b5132
RH		 4663 case bfd_link_hash_undefined:
4664 type = N_UNDF | N_EXT;
4665 val = 0;
4666 break;
4667 case bfd_link_hash_defined:
4668 case bfd_link_hash_defweak:
4669 {
4670 asection *sec;
4671
4672 sec = h->root.u.def.section->output_section;
4673 BFD_ASSERT (bfd_is_abs_section (sec)
4674 || sec->owner == output_bfd);
4675 if (sec == obj_textsec (output_bfd))
4676 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4677 else if (sec == obj_datasec (output_bfd))
4678 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4679 else if (sec == obj_bsssec (output_bfd))
4680 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4681 else
4682 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4683 type |= N_EXT;
4684 val = (h->root.u.def.value
4685 + sec->vma
4686 + h->root.u.def.section->output_offset);
4687 }
4688 break;
4689 case bfd_link_hash_common:
4690 type = N_UNDF | N_EXT;
4691 val = h->root.u.c.size;
4692 break;
4693 case bfd_link_hash_undefweak:
4694 type = N_WEAKU;
4695 val = 0;
4696 case bfd_link_hash_indirect:
e92d460e
AM		 4697 /* We ignore these symbols, since the indirected symbol is
4698 already in the hash table. */
b34976b6 4699 return TRUE;
252b5132
RH		 4700 }
4701
dc810e39
AM		 4702 H_PUT_8 (output_bfd, type, outsym.e_type);
4703 H_PUT_8 (output_bfd, 0, outsym.e_other);
4704 H_PUT_16 (output_bfd, 0, outsym.e_desc);
252b5132 4705 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
b34976b6 4706 FALSE);
dc810e39 4707 if (indx == - (bfd_size_type) 1)
252b5132
RH		 4708 {
4709 /* FIXME: No way to handle errors. */
4710 abort ();
4711 }
4712 PUT_WORD (output_bfd, indx, outsym.e_strx);
4713 PUT_WORD (output_bfd, val, outsym.e_value);
4714
dc810e39 4715 amt = EXTERNAL_NLIST_SIZE;
252b5132 4716 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
dc810e39 4717 || bfd_bwrite ((PTR) &outsym, amt, output_bfd) != amt)
252b5132
RH		 4718 {
4719 /* FIXME: No way to handle errors. */
4720 abort ();
4721 }
4722
4723 finfo->symoff += EXTERNAL_NLIST_SIZE;
4724 h->indx = obj_aout_external_sym_count (output_bfd);
4725 ++obj_aout_external_sym_count (output_bfd);
4726
b34976b6 4727 return TRUE;
252b5132
RH		 4728}
4729
4730/* Link an a.out section into the output file. */
4731
b34976b6 4732static bfd_boolean
252b5132
RH		 4733aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4734 rel_size)
4735 struct aout_final_link_info *finfo;
4736 bfd *input_bfd;
4737 asection *input_section;
4738 file_ptr *reloff_ptr;
4739 bfd_size_type rel_size;
4740{
4741 bfd_size_type input_size;
4742 PTR relocs;
4743
4744 /* Get the section contents. */
4745 input_size = bfd_section_size (input_bfd, input_section);
4746 if (! bfd_get_section_contents (input_bfd, input_section,
4747 (PTR) finfo->contents,
4748 (file_ptr) 0, input_size))
b34976b6 4749 return FALSE;
252b5132
RH		 4750
4751 /* Read in the relocs if we haven't already done it. */
4752 if (aout_section_data (input_section) != NULL
4753 && aout_section_data (input_section)->relocs != NULL)
4754 relocs = aout_section_data (input_section)->relocs;
4755 else
4756 {
4757 relocs = finfo->relocs;
4758 if (rel_size > 0)
4759 {
4760 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
dc810e39 4761 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
b34976b6 4762 return FALSE;
252b5132
RH		 4763 }
4764 }
4765
4766 /* Relocate the section contents. */
4767 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4768 {
4769 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4770 (struct reloc_std_external *) relocs,
4771 rel_size, finfo->contents))
b34976b6 4772 return FALSE;
252b5132
RH		 4773 }
4774 else
4775 {
4776 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4777 (struct reloc_ext_external *) relocs,
4778 rel_size, finfo->contents))
b34976b6 4779 return FALSE;
252b5132
RH		 4780 }
4781
4782 /* Write out the section contents. */
4783 if (! bfd_set_section_contents (finfo->output_bfd,
4784 input_section->output_section,
4785 (PTR) finfo->contents,
dc810e39 4786 (file_ptr) input_section->output_offset,
252b5132 4787 input_size))
b34976b6 4788 return FALSE;
252b5132 4789
1049f94e 4790 /* If we are producing relocatable output, the relocs were
252b5132 4791 modified, and we now write them out. */
1049f94e 4792 if (finfo->info->relocatable && rel_size > 0)
252b5132
RH		 4793 {
4794 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
b34976b6 4795 return FALSE;
dc810e39 4796 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
b34976b6 4797 return FALSE;
252b5132
RH		 4798 *reloff_ptr += rel_size;
4799
4800 /* Assert that the relocs have not run into the symbols, and
4801 that if these are the text relocs they have not run into the
4802 data relocs. */
4803 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4804 && (reloff_ptr != &finfo->treloff
4805 || (*reloff_ptr
4806 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4807 }
4808
b34976b6 4809 return TRUE;
252b5132
RH		 4810}
4811
4812/* Get the section corresponding to a reloc index. */
4813
4814static INLINE asection *
4815aout_reloc_index_to_section (abfd, indx)
4816 bfd *abfd;
4817 int indx;
4818{
4819 switch (indx & N_TYPE)
4820 {
4821 case N_TEXT:
4822 return obj_textsec (abfd);
4823 case N_DATA:
4824 return obj_datasec (abfd);
4825 case N_BSS:
4826 return obj_bsssec (abfd);
4827 case N_ABS:
4828 case N_UNDF:
4829 return bfd_abs_section_ptr;
4830 default:
4831 abort ();
4832 }
7442e600
ILT		 4833 /*NOTREACHED*/
4834 return NULL;
252b5132
RH		 4835}
4836
4837/* Relocate an a.out section using standard a.out relocs. */
4838
b34976b6 4839static bfd_boolean
252b5132
RH		 4840aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4841 rel_size, contents)
4842 struct aout_final_link_info *finfo;
4843 bfd *input_bfd;
4844 asection *input_section;
4845 struct reloc_std_external *relocs;
4846 bfd_size_type rel_size;
4847 bfd_byte *contents;
4848{
b34976b6
AM		 4849 bfd_boolean (*check_dynamic_reloc)
4850 PARAMS ((struct bfd_link_info *, bfd *, asection *,
4851 struct aout_link_hash_entry *, PTR, bfd_byte *, bfd_boolean *,
4852 bfd_vma *));
252b5132 4853 bfd *output_bfd;
1049f94e 4854 bfd_boolean relocatable;
252b5132
RH		 4855 struct external_nlist *syms;
4856 char *strings;
4857 struct aout_link_hash_entry **sym_hashes;
4858 int *symbol_map;
4859 bfd_size_type reloc_count;
4860 register struct reloc_std_external *rel;
4861 struct reloc_std_external *rel_end;
4862
4863 output_bfd = finfo->output_bfd;
4864 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4865
4866 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4867 BFD_ASSERT (input_bfd->xvec->header_byteorder
4868 == output_bfd->xvec->header_byteorder);
4869
1049f94e 4870 relocatable = finfo->info->relocatable;
252b5132
RH		 4871 syms = obj_aout_external_syms (input_bfd);
4872 strings = obj_aout_external_strings (input_bfd);
4873 sym_hashes = obj_aout_sym_hashes (input_bfd);
4874 symbol_map = finfo->symbol_map;
4875
4876 reloc_count = rel_size / RELOC_STD_SIZE;
4877 rel = relocs;
4878 rel_end = rel + reloc_count;
4879 for (; rel < rel_end; rel++)
4880 {
4881 bfd_vma r_addr;
4882 int r_index;
4883 int r_extern;
4884 int r_pcrel;
4885 int r_baserel = 0;
4886 reloc_howto_type *howto;
4887 struct aout_link_hash_entry *h = NULL;
4888 bfd_vma relocation;
4889 bfd_reloc_status_type r;
4890
4891 r_addr = GET_SWORD (input_bfd, rel->r_address);
4892
4893#ifdef MY_reloc_howto
923f08ff 4894 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
0ef5a5bd 4895#else
252b5132
RH		 4896 {
4897 int r_jmptable;
4898 int r_relative;
4899 int r_length;
4900 unsigned int howto_idx;
4901
4902 if (bfd_header_big_endian (input_bfd))
4903 {
d45913a0
DA		 4904 r_index = (((unsigned int) rel->r_index[0] << 16)
4905 | ((unsigned int) rel->r_index[1] << 8)
252b5132
RH		 4906 | rel->r_index[2]);
4907 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4908 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4909 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4910 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4911 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4912 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4913 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4914 }
4915 else
4916 {
d45913a0
DA		 4917 r_index = (((unsigned int) rel->r_index[2] << 16)
4918 | ((unsigned int) rel->r_index[1] << 8)
252b5132
RH		 4919 | rel->r_index[0]);
4920 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4921 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4922 r_baserel = (0 != (rel->r_type[0]
4923 & RELOC_STD_BITS_BASEREL_LITTLE));
4924 r_jmptable= (0 != (rel->r_type[0]
4925 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4926 r_relative= (0 != (rel->r_type[0]
4927 & RELOC_STD_BITS_RELATIVE_LITTLE));
4928 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4929 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4930 }
4931
4932 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4933 + 16 * r_jmptable + 32 * r_relative);
4934 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4935 howto = howto_table_std + howto_idx;
4936 }
4937#endif
4938
1049f94e 4939 if (relocatable)
252b5132 4940 {
1049f94e 4941 /* We are generating a relocatable output file, and must
252b5132
RH		 4942 modify the reloc accordingly. */
4943 if (r_extern)
4944 {
4945 /* If we know the symbol this relocation is against,
4946 convert it into a relocation against a section. This
4947 is what the native linker does. */
4948 h = sym_hashes[r_index];
4949 if (h != (struct aout_link_hash_entry *) NULL
4950 && (h->root.type == bfd_link_hash_defined
4951 || h->root.type == bfd_link_hash_defweak))
4952 {
4953 asection *output_section;
4954
4955 /* Change the r_extern value. */
4956 if (bfd_header_big_endian (output_bfd))
4957 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4958 else
4959 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4960
4961 /* Compute a new r_index. */
4962 output_section = h->root.u.def.section->output_section;
4963 if (output_section == obj_textsec (output_bfd))
4964 r_index = N_TEXT;
4965 else if (output_section == obj_datasec (output_bfd))
4966 r_index = N_DATA;
4967 else if (output_section == obj_bsssec (output_bfd))
4968 r_index = N_BSS;
4969 else
4970 r_index = N_ABS;
4971
4972 /* Add the symbol value and the section VMA to the
4973 addend stored in the contents. */
4974 relocation = (h->root.u.def.value
4975 + output_section->vma
4976 + h->root.u.def.section->output_offset);
4977 }
4978 else
4979 {
4980 /* We must change r_index according to the symbol
4981 map. */
4982 r_index = symbol_map[r_index];
4983
4984 if (r_index == -1)
4985 {
4986 if (h != NULL)
4987 {
4988 /* We decided to strip this symbol, but it
4989 turns out that we can't. Note that we
4990 lose the other and desc information here.
4991 I don't think that will ever matter for a
4992 global symbol. */
4993 if (h->indx < 0)
4994 {
4995 h->indx = -2;
b34976b6 4996 h->written = FALSE;
252b5132
RH		 4997 if (! aout_link_write_other_symbol (h,
4998 (PTR) finfo))
b34976b6 4999 return FALSE;
252b5132
RH		 5000 }
5001 r_index = h->indx;
5002 }
5003 else
5004 {
5005 const char *name;
5006
5007 name = strings + GET_WORD (input_bfd,
5008 syms[r_index].e_strx);
5009 if (! ((*finfo->info->callbacks->unattached_reloc)
5010 (finfo->info, name, input_bfd, input_section,
5011 r_addr)))
b34976b6 5012 return FALSE;
252b5132
RH		 5013 r_index = 0;
5014 }
5015 }
5016
5017 relocation = 0;
5018 }
5019
5020 /* Write out the new r_index value. */
5021 if (bfd_header_big_endian (output_bfd))
5022 {
5023 rel->r_index[0] = r_index >> 16;
5024 rel->r_index[1] = r_index >> 8;
5025 rel->r_index[2] = r_index;
5026 }
5027 else
5028 {
5029 rel->r_index[2] = r_index >> 16;
5030 rel->r_index[1] = r_index >> 8;
5031 rel->r_index[0] = r_index;
5032 }
5033 }
5034 else
5035 {
5036 asection *section;
5037
5038 /* This is a relocation against a section. We must
5039 adjust by the amount that the section moved. */
5040 section = aout_reloc_index_to_section (input_bfd, r_index);
5041 relocation = (section->output_section->vma
5042 + section->output_offset
5043 - section->vma);
5044 }
5045
5046 /* Change the address of the relocation. */
5047 PUT_WORD (output_bfd,
5048 r_addr + input_section->output_offset,
5049 rel->r_address);
5050
5051 /* Adjust a PC relative relocation by removing the reference
5052 to the original address in the section and including the
5053 reference to the new address. */
5054 if (r_pcrel)
5055 relocation -= (input_section->output_section->vma
5056 + input_section->output_offset
5057 - input_section->vma);
5058
5059#ifdef MY_relocatable_reloc
5060 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
5061#endif
5062
5063 if (relocation == 0)
5064 r = bfd_reloc_ok;
5065 else
5066 r = MY_relocate_contents (howto,
5067 input_bfd, relocation,
5068 contents + r_addr);
5069 }
5070 else
5071 {
b34976b6 5072 bfd_boolean hundef;
252b5132
RH		 5073
5074 /* We are generating an executable, and must do a full
5075 relocation. */
b34976b6 5076 hundef = FALSE;
252b5132
RH		 5077
5078 if (r_extern)
5079 {
5080 h = sym_hashes[r_index];
5081
5082 if (h != (struct aout_link_hash_entry *) NULL
5083 && (h->root.type == bfd_link_hash_defined
5084 || h->root.type == bfd_link_hash_defweak))
5085 {
5086 relocation = (h->root.u.def.value
5087 + h->root.u.def.section->output_section->vma
5088 + h->root.u.def.section->output_offset);
5089 }
5090 else if (h != (struct aout_link_hash_entry *) NULL
5091 && h->root.type == bfd_link_hash_undefweak)
5092 relocation = 0;
5093 else
5094 {
b34976b6 5095 hundef = TRUE;
252b5132
RH		 5096 relocation = 0;
5097 }
5098 }
5099 else
5100 {
5101 asection *section;
5102
5103 section = aout_reloc_index_to_section (input_bfd, r_index);
5104 relocation = (section->output_section->vma
5105 + section->output_offset
5106 - section->vma);
5107 if (r_pcrel)
5108 relocation += input_section->vma;
5109 }
5110
5111 if (check_dynamic_reloc != NULL)
5112 {
b34976b6 5113 bfd_boolean skip;
252b5132
RH		 5114
5115 if (! ((*check_dynamic_reloc)
5116 (finfo->info, input_bfd, input_section, h,
5117 (PTR) rel, contents, &skip, &relocation)))
b34976b6 5118 return FALSE;
252b5132
RH		 5119 if (skip)
5120 continue;
5121 }
5122
5123 /* Now warn if a global symbol is undefined. We could not
5124 do this earlier, because check_dynamic_reloc might want
5125 to skip this reloc. */
5126 if (hundef && ! finfo->info->shared && ! r_baserel)
5127 {
5128 const char *name;
5129
5130 if (h != NULL)
5131 name = h->root.root.string;
5132 else
5133 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5134 if (! ((*finfo->info->callbacks->undefined_symbol)
5cc7c785 5135 (finfo->info, name, input_bfd, input_section,
b34976b6
AM		 5136 r_addr, TRUE)))
5137 return FALSE;
252b5132
RH		 5138 }
5139
5140 r = MY_final_link_relocate (howto,
5141 input_bfd, input_section,
5142 contents, r_addr, relocation,
5143 (bfd_vma) 0);
5144 }
5145
5146 if (r != bfd_reloc_ok)
5147 {
5148 switch (r)
5149 {
5150 default:
5151 case bfd_reloc_outofrange:
5152 abort ();
5153 case bfd_reloc_overflow:
5154 {
5155 const char *name;
5156
5157 if (h != NULL)
5158 name = h->root.root.string;
5159 else if (r_extern)
5160 name = strings + GET_WORD (input_bfd,
5161 syms[r_index].e_strx);
5162 else
5163 {
5164 asection *s;
5165
5166 s = aout_reloc_index_to_section (input_bfd, r_index);
5167 name = bfd_section_name (input_bfd, s);
5168 }
5169 if (! ((*finfo->info->callbacks->reloc_overflow)
5170 (finfo->info, name, howto->name,
5171 (bfd_vma) 0, input_bfd, input_section, r_addr)))
b34976b6 5172 return FALSE;
252b5132
RH		 5173 }
5174 break;
5175 }
5176 }
5177 }
5178
b34976b6 5179 return TRUE;
252b5132
RH		 5180}
5181
5182/* Relocate an a.out section using extended a.out relocs. */
5183
b34976b6 5184static bfd_boolean
252b5132
RH		 5185aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5186 rel_size, contents)
5187 struct aout_final_link_info *finfo;
5188 bfd *input_bfd;
5189 asection *input_section;
5190 struct reloc_ext_external *relocs;
5191 bfd_size_type rel_size;
5192 bfd_byte *contents;
5193{
b34976b6
AM		 5194 bfd_boolean (*check_dynamic_reloc)
5195 PARAMS ((struct bfd_link_info *, bfd *, asection *,
5196 struct aout_link_hash_entry *, PTR, bfd_byte *, bfd_boolean *,
5197 bfd_vma *));
252b5132 5198 bfd *output_bfd;
1049f94e 5199 bfd_boolean relocatable;
252b5132
RH		 5200 struct external_nlist *syms;
5201 char *strings;
5202 struct aout_link_hash_entry **sym_hashes;
5203 int *symbol_map;
5204 bfd_size_type reloc_count;
5205 register struct reloc_ext_external *rel;
5206 struct reloc_ext_external *rel_end;
5207
5208 output_bfd = finfo->output_bfd;
5209 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5210
5211 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5212 BFD_ASSERT (input_bfd->xvec->header_byteorder
5213 == output_bfd->xvec->header_byteorder);
5214
1049f94e 5215 relocatable = finfo->info->relocatable;
252b5132
RH		 5216 syms = obj_aout_external_syms (input_bfd);
5217 strings = obj_aout_external_strings (input_bfd);
5218 sym_hashes = obj_aout_sym_hashes (input_bfd);
5219 symbol_map = finfo->symbol_map;
5220
5221 reloc_count = rel_size / RELOC_EXT_SIZE;
5222 rel = relocs;
5223 rel_end = rel + reloc_count;
5224 for (; rel < rel_end; rel++)
5225 {
5226 bfd_vma r_addr;
5227 int r_index;
5228 int r_extern;
5229 unsigned int r_type;
5230 bfd_vma r_addend;
5231 struct aout_link_hash_entry *h = NULL;
5232 asection *r_section = NULL;
5233 bfd_vma relocation;
5234
5235 r_addr = GET_SWORD (input_bfd, rel->r_address);
5236
5237 if (bfd_header_big_endian (input_bfd))
5238 {
d45913a0
DA		 5239 r_index = (((unsigned int) rel->r_index[0] << 16)
5240 | ((unsigned int) rel->r_index[1] << 8)
252b5132
RH		 5241 | rel->r_index[2]);
5242 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5243 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5244 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5245 }
5246 else
5247 {
d45913a0
DA		 5248 r_index = (((unsigned int) rel->r_index[2] << 16)
5249 | ((unsigned int) rel->r_index[1] << 8)
252b5132
RH		 5250 | rel->r_index[0]);
5251 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5252 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5253 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5254 }
5255
5256 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5257
5258 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5259
1049f94e 5260 if (relocatable)
252b5132 5261 {
1049f94e 5262 /* We are generating a relocatable output file, and must
252b5132
RH		 5263 modify the reloc accordingly. */
5264 if (r_extern
d45913a0
DA		 5265 || r_type == (unsigned int) RELOC_BASE10
5266 || r_type == (unsigned int) RELOC_BASE13
5267 || r_type == (unsigned int) RELOC_BASE22)
252b5132
RH		 5268 {
5269 /* If we know the symbol this relocation is against,
5270 convert it into a relocation against a section. This
5271 is what the native linker does. */
d45913a0
DA		 5272 if (r_type == (unsigned int) RELOC_BASE10
5273 || r_type == (unsigned int) RELOC_BASE13
5274 || r_type == (unsigned int) RELOC_BASE22)
252b5132
RH		 5275 h = NULL;
5276 else
5277 h = sym_hashes[r_index];
5278 if (h != (struct aout_link_hash_entry *) NULL
5279 && (h->root.type == bfd_link_hash_defined
5280 || h->root.type == bfd_link_hash_defweak))
5281 {
5282 asection *output_section;
5283
5284 /* Change the r_extern value. */
5285 if (bfd_header_big_endian (output_bfd))
5286 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5287 else
5288 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5289
5290 /* Compute a new r_index. */
5291 output_section = h->root.u.def.section->output_section;
5292 if (output_section == obj_textsec (output_bfd))
5293 r_index = N_TEXT;
5294 else if (output_section == obj_datasec (output_bfd))
5295 r_index = N_DATA;
5296 else if (output_section == obj_bsssec (output_bfd))
5297 r_index = N_BSS;
5298 else
5299 r_index = N_ABS;
5300
5301 /* Add the symbol value and the section VMA to the
5302 addend. */
5303 relocation = (h->root.u.def.value
5304 + output_section->vma
5305 + h->root.u.def.section->output_offset);
5306
5307 /* Now RELOCATION is the VMA of the final
5308 destination. If this is a PC relative reloc,
5309 then ADDEND is the negative of the source VMA.
5310 We want to set ADDEND to the difference between
5311 the destination VMA and the source VMA, which
5312 means we must adjust RELOCATION by the change in
5313 the source VMA. This is done below. */
5314 }
5315 else
5316 {
5317 /* We must change r_index according to the symbol
5318 map. */
5319 r_index = symbol_map[r_index];
5320
5321 if (r_index == -1)
5322 {
5323 if (h != NULL)
5324 {
5325 /* We decided to strip this symbol, but it
5326 turns out that we can't. Note that we
5327 lose the other and desc information here.
5328 I don't think that will ever matter for a
5329 global symbol. */
5330 if (h->indx < 0)
5331 {
5332 h->indx = -2;
b34976b6 5333 h->written = FALSE;
252b5132
RH		 5334 if (! aout_link_write_other_symbol (h,
5335 (PTR) finfo))
b34976b6 5336 return FALSE;
252b5132
RH		 5337 }
5338 r_index = h->indx;
5339 }
5340 else
5341 {
5342 const char *name;
5343
5344 name = strings + GET_WORD (input_bfd,
5345 syms[r_index].e_strx);
5346 if (! ((*finfo->info->callbacks->unattached_reloc)
5347 (finfo->info, name, input_bfd, input_section,
5348 r_addr)))
b34976b6 5349 return FALSE;
252b5132
RH		 5350 r_index = 0;
5351 }
5352 }
5353
5354 relocation = 0;
5355
5356 /* If this is a PC relative reloc, then the addend
5357 is the negative of the source VMA. We must
5358 adjust it by the change in the source VMA. This
5359 is done below. */
5360 }
5361
5362 /* Write out the new r_index value. */
5363 if (bfd_header_big_endian (output_bfd))
5364 {
5365 rel->r_index[0] = r_index >> 16;
5366 rel->r_index[1] = r_index >> 8;
5367 rel->r_index[2] = r_index;
5368 }
5369 else
5370 {
5371 rel->r_index[2] = r_index >> 16;
5372 rel->r_index[1] = r_index >> 8;
5373 rel->r_index[0] = r_index;
5374 }
5375 }
5376 else
5377 {
5378 /* This is a relocation against a section. We must
5379 adjust by the amount that the section moved. */
5380 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5381 relocation = (r_section->output_section->vma
5382 + r_section->output_offset
5383 - r_section->vma);
5384
5385 /* If this is a PC relative reloc, then the addend is
5386 the difference in VMA between the destination and the
5387 source. We have just adjusted for the change in VMA
5388 of the destination, so we must also adjust by the
5389 change in VMA of the source. This is done below. */
5390 }
5391
5392 /* As described above, we must always adjust a PC relative
5393 reloc by the change in VMA of the source. However, if
5394 pcrel_offset is set, then the addend does not include the
5395 location within the section, in which case we don't need
5396 to adjust anything. */
5397 if (howto_table_ext[r_type].pc_relative
5398 && ! howto_table_ext[r_type].pcrel_offset)
5399 relocation -= (input_section->output_section->vma
5400 + input_section->output_offset
5401 - input_section->vma);
5402
5403 /* Change the addend if necessary. */
5404 if (relocation != 0)
5405 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5406
5407 /* Change the address of the relocation. */
5408 PUT_WORD (output_bfd,
5409 r_addr + input_section->output_offset,
5410 rel->r_address);
5411 }
5412 else
5413 {
b34976b6 5414 bfd_boolean hundef;
252b5132
RH		 5415 bfd_reloc_status_type r;
5416
5417 /* We are generating an executable, and must do a full
5418 relocation. */
b34976b6 5419 hundef = FALSE;
252b5132
RH		 5420
5421 if (r_extern)
5422 {
5423 h = sym_hashes[r_index];
5424
5425 if (h != (struct aout_link_hash_entry *) NULL
5426 && (h->root.type == bfd_link_hash_defined
5427 || h->root.type == bfd_link_hash_defweak))
5428 {
5429 relocation = (h->root.u.def.value
5430 + h->root.u.def.section->output_section->vma
5431 + h->root.u.def.section->output_offset);
5432 }
5433 else if (h != (struct aout_link_hash_entry *) NULL
5434 && h->root.type == bfd_link_hash_undefweak)
5435 relocation = 0;
5436 else
5437 {
b34976b6 5438 hundef = TRUE;
252b5132
RH		 5439 relocation = 0;
5440 }
5441 }
d45913a0
DA		 5442 else if (r_type == (unsigned int) RELOC_BASE10
5443 || r_type == (unsigned int) RELOC_BASE13
5444 || r_type == (unsigned int) RELOC_BASE22)
252b5132
RH		 5445 {
5446 struct external_nlist *sym;
5447 int type;
5448
5449 /* For base relative relocs, r_index is always an index
5450 into the symbol table, even if r_extern is 0. */
5451 sym = syms + r_index;
dc810e39 5452 type = H_GET_8 (input_bfd, sym->e_type);
252b5132
RH		 5453 if ((type & N_TYPE) == N_TEXT
5454 || type == N_WEAKT)
5455 r_section = obj_textsec (input_bfd);
5456 else if ((type & N_TYPE) == N_DATA
5457 || type == N_WEAKD)
5458 r_section = obj_datasec (input_bfd);
5459 else if ((type & N_TYPE) == N_BSS
5460 || type == N_WEAKB)
5461 r_section = obj_bsssec (input_bfd);
5462 else if ((type & N_TYPE) == N_ABS
5463 || type == N_WEAKA)
5464 r_section = bfd_abs_section_ptr;
5465 else
5466 abort ();
5467 relocation = (r_section->output_section->vma
5468 + r_section->output_offset
5469 + (GET_WORD (input_bfd, sym->e_value)
5470 - r_section->vma));
5471 }
5472 else
5473 {
5474 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5475
5476 /* If this is a PC relative reloc, then R_ADDEND is the
5477 difference between the two vmas, or
5478 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5479 where
5480 old_dest_sec == section->vma
5481 and
5482 old_src_sec == input_section->vma
5483 and
5484 old_src_off == r_addr
5485
5486 _bfd_final_link_relocate expects RELOCATION +
5487 R_ADDEND to be the VMA of the destination minus
5488 r_addr (the minus r_addr is because this relocation
5489 is not pcrel_offset, which is a bit confusing and
5490 should, perhaps, be changed), or
5491 new_dest_sec
5492 where
5493 new_dest_sec == output_section->vma + output_offset
5494 We arrange for this to happen by setting RELOCATION to
5495 new_dest_sec + old_src_sec - old_dest_sec
5496
5497 If this is not a PC relative reloc, then R_ADDEND is
5498 simply the VMA of the destination, so we set
5499 RELOCATION to the change in the destination VMA, or
5500 new_dest_sec - old_dest_sec
5501 */
5502 relocation = (r_section->output_section->vma
5503 + r_section->output_offset
5504 - r_section->vma);
5505 if (howto_table_ext[r_type].pc_relative)
5506 relocation += input_section->vma;
5507 }
5508
5509 if (check_dynamic_reloc != NULL)
5510 {
b34976b6 5511 bfd_boolean skip;
252b5132
RH		 5512
5513 if (! ((*check_dynamic_reloc)
5514 (finfo->info, input_bfd, input_section, h,
5515 (PTR) rel, contents, &skip, &relocation)))
b34976b6 5516 return FALSE;
252b5132
RH		 5517 if (skip)
5518 continue;
5519 }
5520
5521 /* Now warn if a global symbol is undefined. We could not
5522 do this earlier, because check_dynamic_reloc might want
5523 to skip this reloc. */
5524 if (hundef
5525 && ! finfo->info->shared
d45913a0
DA		 5526 && r_type != (unsigned int) RELOC_BASE10
5527 && r_type != (unsigned int) RELOC_BASE13
5528 && r_type != (unsigned int) RELOC_BASE22)
252b5132
RH		 5529 {
5530 const char *name;
5531
5532 if (h != NULL)
5533 name = h->root.root.string;
5534 else
5535 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5536 if (! ((*finfo->info->callbacks->undefined_symbol)
5cc7c785 5537 (finfo->info, name, input_bfd, input_section,
b34976b6
AM		 5538 r_addr, TRUE)))
5539 return FALSE;
252b5132
RH		 5540 }
5541
d45913a0 5542 if (r_type != (unsigned int) RELOC_SPARC_REV32)
252b5132
RH		 5543 r = MY_final_link_relocate (howto_table_ext + r_type,
5544 input_bfd, input_section,
5545 contents, r_addr, relocation,
5546 r_addend);
5547 else
5548 {
5549 bfd_vma x;
5550
5551 x = bfd_get_32 (input_bfd, contents + r_addr);
5552 x = x + relocation + r_addend;
5553 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5554 r = bfd_reloc_ok;
5555 }
5556
5557 if (r != bfd_reloc_ok)
5558 {
5559 switch (r)
5560 {
5561 default:
5562 case bfd_reloc_outofrange:
5563 abort ();
5564 case bfd_reloc_overflow:
5565 {
5566 const char *name;
5567
5568 if (h != NULL)
5569 name = h->root.root.string;
5570 else if (r_extern
d45913a0
DA		 5571 || r_type == (unsigned int) RELOC_BASE10
5572 || r_type == (unsigned int) RELOC_BASE13
5573 || r_type == (unsigned int) RELOC_BASE22)
252b5132
RH		 5574 name = strings + GET_WORD (input_bfd,
5575 syms[r_index].e_strx);
5576 else
5577 {
5578 asection *s;
5579
5580 s = aout_reloc_index_to_section (input_bfd, r_index);
5581 name = bfd_section_name (input_bfd, s);
5582 }
5583 if (! ((*finfo->info->callbacks->reloc_overflow)
5584 (finfo->info, name, howto_table_ext[r_type].name,
5585 r_addend, input_bfd, input_section, r_addr)))
b34976b6 5586 return FALSE;
252b5132
RH		 5587 }
5588 break;
5589 }
5590 }
5591 }
5592 }
5593
b34976b6 5594 return TRUE;
252b5132
RH		 5595}
5596
5597/* Handle a link order which is supposed to generate a reloc. */
5598
b34976b6 5599static bfd_boolean
252b5132
RH		 5600aout_link_reloc_link_order (finfo, o, p)
5601 struct aout_final_link_info *finfo;
5602 asection *o;
5603 struct bfd_link_order *p;
5604{
5605 struct bfd_link_order_reloc *pr;
5606 int r_index;
5607 int r_extern;
5608 reloc_howto_type *howto;
7442e600 5609 file_ptr *reloff_ptr = NULL;
252b5132
RH		 5610 struct reloc_std_external srel;
5611 struct reloc_ext_external erel;
5612 PTR rel_ptr;
dc810e39 5613 bfd_size_type amt;
252b5132
RH		 5614
5615 pr = p->u.reloc.p;
5616
5617 if (p->type == bfd_section_reloc_link_order)
5618 {
5619 r_extern = 0;
5620 if (bfd_is_abs_section (pr->u.section))
5621 r_index = N_ABS | N_EXT;
5622 else
5623 {
5624 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5625 r_index = pr->u.section->target_index;
5626 }
5627 }
5628 else
5629 {
5630 struct aout_link_hash_entry *h;
5631
5632 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5633 r_extern = 1;
5634 h = ((struct aout_link_hash_entry *)
5635 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
b34976b6 5636 pr->u.name, FALSE, FALSE, TRUE));
252b5132
RH		 5637 if (h != (struct aout_link_hash_entry *) NULL
5638 && h->indx >= 0)
5639 r_index = h->indx;
5640 else if (h != NULL)
5641 {
5642 /* We decided to strip this symbol, but it turns out that we
5643 can't. Note that we lose the other and desc information
5644 here. I don't think that will ever matter for a global
5645 symbol. */
5646 h->indx = -2;
b34976b6 5647 h->written = FALSE;
252b5132 5648 if (! aout_link_write_other_symbol (h, (PTR) finfo))
b34976b6 5649 return FALSE;
252b5132
RH		 5650 r_index = h->indx;
5651 }
5652 else
5653 {
5654 if (! ((*finfo->info->callbacks->unattached_reloc)
5655 (finfo->info, pr->u.name, (bfd *) NULL,
5656 (asection *) NULL, (bfd_vma) 0)))
b34976b6 5657 return FALSE;
252b5132
RH		 5658 r_index = 0;
5659 }
5660 }
5661
5662 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5663 if (howto == 0)
5664 {
5665 bfd_set_error (bfd_error_bad_value);
b34976b6 5666 return FALSE;
252b5132
RH		 5667 }
5668
5669 if (o == obj_textsec (finfo->output_bfd))
5670 reloff_ptr = &finfo->treloff;
5671 else if (o == obj_datasec (finfo->output_bfd))
5672 reloff_ptr = &finfo->dreloff;
5673 else
5674 abort ();
5675
5676 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5677 {
5678#ifdef MY_put_reloc
923f08ff
AM		 5679 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
5680 &srel);
252b5132
RH		 5681#else
5682 {
5683 int r_pcrel;
5684 int r_baserel;
5685 int r_jmptable;
5686 int r_relative;
5687 int r_length;
5688
d45913a0 5689 r_pcrel = (int) howto->pc_relative;
252b5132
RH		 5690 r_baserel = (howto->type & 8) != 0;
5691 r_jmptable = (howto->type & 16) != 0;
5692 r_relative = (howto->type & 32) != 0;
5693 r_length = howto->size;
5694
5695 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5696 if (bfd_header_big_endian (finfo->output_bfd))
5697 {
5698 srel.r_index[0] = r_index >> 16;
5699 srel.r_index[1] = r_index >> 8;
5700 srel.r_index[2] = r_index;
5701 srel.r_type[0] =
5702 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5703 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5704 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5705 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5706 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5707 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5708 }
5709 else
5710 {
5711 srel.r_index[2] = r_index >> 16;
5712 srel.r_index[1] = r_index >> 8;
5713 srel.r_index[0] = r_index;
5714 srel.r_type[0] =
5715 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5716 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5717 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5718 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5719 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5720 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5721 }
5722 }
5723#endif
5724 rel_ptr = (PTR) &srel;
5725
5726 /* We have to write the addend into the object file, since
5727 standard a.out relocs are in place. It would be more
5728 reliable if we had the current contents of the file here,
5729 rather than assuming zeroes, but we can't read the file since
5730 it was opened using bfd_openw. */
5731 if (pr->addend != 0)
5732 {
5733 bfd_size_type size;
5734 bfd_reloc_status_type r;
5735 bfd_byte *buf;
b34976b6 5736 bfd_boolean ok;
252b5132
RH		 5737
5738 size = bfd_get_reloc_size (howto);
5739 buf = (bfd_byte *) bfd_zmalloc (size);
5740 if (buf == (bfd_byte *) NULL)
b34976b6 5741 return FALSE;
252b5132 5742 r = MY_relocate_contents (howto, finfo->output_bfd,
dc810e39 5743 (bfd_vma) pr->addend, buf);
252b5132
RH		 5744 switch (r)
5745 {
5746 case bfd_reloc_ok:
5747 break;
5748 default:
5749 case bfd_reloc_outofrange:
5750 abort ();
5751 case bfd_reloc_overflow:
5752 if (! ((*finfo->info->callbacks->reloc_overflow)
5753 (finfo->info,
5754 (p->type == bfd_section_reloc_link_order
5755 ? bfd_section_name (finfo->output_bfd,
5756 pr->u.section)
5757 : pr->u.name),
5758 howto->name, pr->addend, (bfd *) NULL,
5759 (asection *) NULL, (bfd_vma) 0)))
5760 {
5761 free (buf);
b34976b6 5762 return FALSE;
252b5132
RH		 5763 }
5764 break;
5765 }
dc810e39
AM		 5766 ok = bfd_set_section_contents (finfo->output_bfd, o, (PTR) buf,
5767 (file_ptr) p->offset, size);
252b5132
RH		 5768 free (buf);
5769 if (! ok)
b34976b6 5770 return FALSE;
252b5132
RH		 5771 }
5772 }
5773 else
5774 {
1642229e
HPN		 5775#ifdef MY_put_ext_reloc
5776 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5777 howto, &erel, pr->addend);
5778#else
252b5132
RH		 5779 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5780
5781 if (bfd_header_big_endian (finfo->output_bfd))
5782 {
5783 erel.r_index[0] = r_index >> 16;
5784 erel.r_index[1] = r_index >> 8;
5785 erel.r_index[2] = r_index;
5786 erel.r_type[0] =
5787 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5788 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5789 }
5790 else
5791 {
5792 erel.r_index[2] = r_index >> 16;
5793 erel.r_index[1] = r_index >> 8;
5794 erel.r_index[0] = r_index;
5795 erel.r_type[0] =
5796 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5797 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5798 }
5799
dc810e39 5800 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
1642229e 5801#endif /* MY_put_ext_reloc */
252b5132
RH		 5802
5803 rel_ptr = (PTR) &erel;
5804 }
5805
dc810e39 5806 amt = obj_reloc_entry_size (finfo->output_bfd);
252b5132 5807 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
dc810e39 5808 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
b34976b6 5809 return FALSE;
252b5132
RH		 5810
5811 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5812
5813 /* Assert that the relocs have not run into the symbols, and that n
5814 the text relocs have not run into the data relocs. */
5815 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5816 && (reloff_ptr != &finfo->treloff
5817 || (*reloff_ptr
5818 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
5819
b34976b6 5820 return TRUE;
252b5132 5821}
GDB Binutils - Deliverables
This page took 0.647835 seconds and 4 git commands to generate.