1 /* BFD back-end for PDP-11 a.out binaries.
2 Copyright (C) 2001-2024 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
22 /* BFD backend for PDP-11, running 2.11BSD in particular.
24 This file was hacked up by looking hard at the existing vaxnetbsd
25 back end and the header files in 2.11BSD. The symbol table format
26 of 2.11BSD has been extended to accommodate .stab symbols. See
27 struct pdp11_external_nlist below for details.
30 * support for V7 file formats
31 * support for overlay object files (see 2.11 a.out(5))
32 * support for old and very old archives
33 (see 2.11 ar(5), historical section)
35 Search for TODO to find other areas needing more work. */
37 #define BYTES_IN_WORD 2
38 #define BYTES_IN_LONG 4
40 #undef TARGET_IS_BIG_ENDIAN_P
42 #define TARGET_PAGE_SIZE 8192
43 #define SEGMENT__SIZE TARGET_PAGE_SIZE
45 #define DEFAULT_ARCH bfd_arch_pdp11
46 #define DEFAULT_MID M_PDP11
48 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
49 remove whitespace added here, and thus will fail to concatenate
51 #define MY(OP) CONCAT2 (pdp11_aout_,OP)
53 /* This needs to start with a.out so GDB knows it is an a.out variant. */
54 #define TARGETNAME "a.out-pdp11"
56 /* This is the normal load address for executables. */
57 #define TEXT_START_ADDR 0
59 /* The header is not included in the text segment. */
60 #define N_HEADER_IN_TEXT(x) 0
62 /* There is no flags field. */
63 #define N_FLAGS(execp) 0
65 #define N_SET_FLAGS(execp, flags) do { } while (0)
66 #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
67 && N_MAGIC(x) != NMAGIC \
68 && N_MAGIC(x) != IMAGIC \
69 && N_MAGIC(x) != ZMAGIC)
75 #define external_exec pdp11_external_exec
76 struct pdp11_external_exec
78 bfd_byte e_info
[2]; /* Magic number. */
79 bfd_byte e_text
[2]; /* Length of text section in bytes. */
80 bfd_byte e_data
[2]; /* Length of data section in bytes. */
81 bfd_byte e_bss
[2]; /* Length of bss area in bytes. */
82 bfd_byte e_syms
[2]; /* Length of symbol table in bytes. */
83 bfd_byte e_entry
[2]; /* Start address. */
84 bfd_byte e_unused
[2]; /* Not used. */
85 bfd_byte e_flag
[2]; /* Relocation info stripped. */
86 bfd_byte e_relocatable
; /* Ugly hack. */
89 #define EXEC_BYTES_SIZE (8 * 2)
91 #define A_MAGIC1 OMAGIC
92 #define OMAGIC 0407 /* ...object file or impure executable. */
93 #define A_MAGIC2 NMAGIC
94 #define NMAGIC 0410 /* Pure executable. */
95 #define ZMAGIC 0413 /* Demand-paged executable. */
96 #define IMAGIC 0411 /* Separated I&D. */
97 #define A_MAGIC3 IMAGIC
98 #define A_MAGIC4 0405 /* Overlay. */
99 #define A_MAGIC5 0430 /* Auto-overlay (nonseparate). */
100 #define A_MAGIC6 0431 /* Auto-overlay (separate). */
104 #define A_FLAG_RELOC_STRIPPED 0x0001
106 /* The following struct defines the format of an entry in the object file
107 symbol table. In the original 2.11BSD struct the index into the string
108 table is stored as a long, but the PDP11 C convention for storing a long in
109 memory placed the most significant word first even though the bytes within a
110 word are stored least significant first. So here the string table index is
111 considered to be just 16 bits and the first two bytes of the struct were
112 previously named e_unused. To extend the symbol table format to accommodate
113 .stab symbols, the e_unused bytes are renamed e_desc to store the desc field
114 of the .stab symbol. The GDP Project's STABS document says that the "other"
115 field is almost always unused and can be set to zero; the only nonzero cases
116 identified were for stabs in their own sections, which does not apply for
117 pdp11 a.out format, and for a special case of GNU Modula2 which is not
118 supported for the PDP11. */
119 #define external_nlist pdp11_external_nlist
120 struct pdp11_external_nlist
122 bfd_byte e_desc
[2]; /* The desc field for .stab symbols, else 0. */
123 bfd_byte e_strx
[2]; /* Index into string table of name. */
124 bfd_byte e_type
[1]; /* Type of symbol. */
125 bfd_byte e_ovly
[1]; /* Overlay number. */
126 bfd_byte e_value
[2]; /* Value of symbol. */
129 #define EXTERNAL_NLIST_SIZE 8
131 #define N_TXTOFF(x) (EXEC_BYTES_SIZE)
132 #define N_DATOFF(x) (N_TXTOFF(x) + (x)->a_text)
133 #define N_TRELOFF(x) (N_DATOFF(x) + (x)->a_data)
134 #define N_DRELOFF(x) (N_TRELOFF(x) + (x)->a_trsize)
135 #define N_SYMOFF(x) (N_DRELOFF(x) + (x)->a_drsize)
136 #define N_STROFF(x) (N_SYMOFF(x) + (x)->a_syms)
138 #define WRITE_HEADERS(abfd, execp) pdp11_aout_write_headers (abfd, execp)
143 #define SWAP_MAGIC(ext) bfd_getl16 (ext)
145 #define MY_entry_is_text_address 1
147 #define MY_write_object_contents MY(write_object_contents)
148 static bool MY(write_object_contents
) (bfd
*);
149 #define MY_text_includes_header 1
151 #define MY_BFD_TARGET
153 #include "aout-target.h"
155 /* Start of modified aoutx.h. */
156 #define KEEPIT udata.i
158 #include <string.h> /* For strchr and friends. */
161 #include "safe-ctype.h"
165 #include "aout/aout64.h"
166 #include "aout/stab_gnu.h"
169 /* The symbol type numbers for the 16-bit a.out format from 2.11BSD differ from
170 those defined in aout64.h so we must redefine them here. N_EXT changes from
171 0x01 to 0x20 which creates a conflict with some .stab values, in particular
172 between undefined externals (N_UNDF+N_EXT) vs. global variables (N_GYSM) and
173 between external bss symbols (N_BSS+N_EXT) vs. function names (N_FUN). We
174 disambiguate those conflicts with a hack in is_stab() to look for the ':' in
175 the global variable or function name string. */
186 #define N_TYPE 0x1f /* Type mask. */
187 #define N_UNDF 0x00 /* Undefined. */
188 #define N_ABS 0x01 /* Absolute. */
189 #define N_TEXT 0x02 /* Text segment. */
190 #define N_DATA 0x03 /* Data segment. */
191 #define N_BSS 0x04 /* Bss segment. */
192 #define N_REG 0x14 /* Register symbol. */
193 #define N_FN 0x1f /* File name. */
194 #define N_EXT 0x20 /* External flag. */
195 /* Type numbers from .stab entries that could conflict:
196 N_GSYM 0x20 Global variable [conflict with external undef]
197 N_FNAME 0x22 Function name (for BSD Fortran) [ignored]
198 N_FUN 0x24 Function name [conflict with external BSS]
199 N_NOMAP 0x34 No DST map for sym. [ext. reg. doesn't exist]
204 #define RELFLG 0x0001 /* PC-relative flag. */
205 #define RTYPE 0x000e /* Type mask. */
206 #define RIDXMASK 0xfff0 /* Index mask. */
208 #define RABS 0x00 /* Absolute. */
209 #define RTEXT 0x02 /* Text. */
210 #define RDATA 0x04 /* Data. */
211 #define RBSS 0x06 /* Bss. */
212 #define REXT 0x08 /* External. */
214 #define RINDEX(x) (((x) & 0xfff0) >> 4)
216 #ifndef MY_final_link_relocate
217 #define MY_final_link_relocate _bfd_final_link_relocate
220 #ifndef MY_relocate_contents
221 #define MY_relocate_contents _bfd_relocate_contents
224 /* A hash table used for header files with N_BINCL entries. */
226 struct aout_link_includes_table
228 struct bfd_hash_table root
;
231 /* A linked list of totals that we have found for a particular header
234 struct aout_link_includes_totals
236 struct aout_link_includes_totals
*next
;
240 /* An entry in the header file hash table. */
242 struct aout_link_includes_entry
244 struct bfd_hash_entry root
;
245 /* List of totals we have found for this file. */
246 struct aout_link_includes_totals
*totals
;
249 /* During the final link step we need to pass around a bunch of
250 information, so we do it in an instance of this structure. */
252 struct aout_final_link_info
254 /* General link information. */
255 struct bfd_link_info
*info
;
258 /* Reloc file positions. */
259 file_ptr treloff
, dreloff
;
260 /* File position of symbols. */
263 struct bfd_strtab_hash
*strtab
;
264 /* Header file hash table. */
265 struct aout_link_includes_table includes
;
266 /* A buffer large enough to hold the contents of any section. */
268 /* A buffer large enough to hold the relocs of any section. */
270 /* A buffer large enough to hold the symbol map of any input BFD. */
272 /* A buffer large enough to hold output symbols of any input BFD. */
273 struct external_nlist
*output_syms
;
276 /* Copy of the link_info.separate_code boolean to select the output format with
277 separate instruction and data spaces selected by --imagic */
278 static bool separate_i_d
= false;
280 reloc_howto_type howto_table_pdp11
[] =
282 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
283 HOWTO( 0, 0, 2, 16, false, 0, complain_overflow_dont
,0,"16", true, 0x0000ffff,0x0000ffff, false),
284 HOWTO( 1, 0, 2, 16, true, 0, complain_overflow_dont
,0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
285 HOWTO( 2, 0, 4, 32, false, 0, complain_overflow_dont
,0,"32", true, 0x0000ffff,0x0000ffff, false),
288 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
291 static bool aout_link_check_archive_element (bfd
*, struct bfd_link_info
*,
292 struct bfd_link_hash_entry
*,
293 const char *, bool *);
294 static bool aout_link_add_object_symbols (bfd
*, struct bfd_link_info
*);
295 static bool aout_link_add_symbols (bfd
*, struct bfd_link_info
*);
296 static bool aout_link_write_symbols (struct aout_final_link_info
*, bfd
*);
300 NAME (aout
, reloc_type_lookup
) (bfd
* abfd ATTRIBUTE_UNUSED
,
301 bfd_reloc_code_real_type code
)
306 return &howto_table_pdp11
[0];
307 case BFD_RELOC_16_PCREL
:
308 return &howto_table_pdp11
[1];
310 return &howto_table_pdp11
[2];
317 NAME (aout
, reloc_name_lookup
) (bfd
*abfd ATTRIBUTE_UNUSED
,
323 i
< sizeof (howto_table_pdp11
) / sizeof (howto_table_pdp11
[0]);
325 if (howto_table_pdp11
[i
].name
!= NULL
326 && strcasecmp (howto_table_pdp11
[i
].name
, r_name
) == 0)
327 return &howto_table_pdp11
[i
];
332 /* Disambiguate conflicts between normal symbol types and .stab symbol types
333 (undefined externals N_UNDF+N_EXT vs. global variables N_GYSM and external
334 bss symbols N_BSS+N_EXT vs. function names N_FUN) with a hack to look for
335 the ':' in the global variable or function name string. */
338 is_stab (int type
, const char *name
)
340 if (type
== N_GSYM
|| type
== N_FUN
)
341 return strchr (name
, ':') != NULL
;
346 pdp11_aout_write_headers (bfd
*abfd
, struct internal_exec
*execp
)
348 struct external_exec exec_bytes
;
350 if (adata(abfd
).magic
== undecided_magic
)
351 NAME (aout
, adjust_sizes_and_vmas
) (abfd
);
353 execp
->a_syms
= bfd_get_symcount (abfd
) * EXTERNAL_NLIST_SIZE
;
354 execp
->a_entry
= bfd_get_start_address (abfd
);
356 if (obj_textsec (abfd
)->reloc_count
> 0
357 || obj_datasec (abfd
)->reloc_count
> 0)
359 execp
->a_trsize
= execp
->a_text
;
360 execp
->a_drsize
= execp
->a_data
;
368 if (!NAME (aout
, swap_exec_header_out
) (abfd
, execp
, & exec_bytes
))
371 if (bfd_seek (abfd
, 0, SEEK_SET
) != 0)
374 if (bfd_write (&exec_bytes
, EXEC_BYTES_SIZE
, abfd
) != EXEC_BYTES_SIZE
)
377 /* Now write out reloc info, followed by syms and strings. */
378 if (bfd_get_outsymbols (abfd
) != NULL
379 && bfd_get_symcount (abfd
) != 0)
381 if (bfd_seek (abfd
, N_SYMOFF (execp
), SEEK_SET
) != 0)
384 if (! NAME (aout
, write_syms
) (abfd
))
388 if (obj_textsec (abfd
)->reloc_count
> 0
389 || obj_datasec (abfd
)->reloc_count
> 0)
391 if (bfd_seek (abfd
, N_TRELOFF (execp
), SEEK_SET
) != 0
392 || !NAME (aout
, squirt_out_relocs
) (abfd
, obj_textsec (abfd
))
393 || bfd_seek (abfd
, N_DRELOFF (execp
), SEEK_SET
) != 0
394 || !NAME (aout
, squirt_out_relocs
) (abfd
, obj_datasec (abfd
)))
401 /* Write an object file.
402 Section contents have already been written. We write the
403 file header, symbols, and relocation. */
406 MY(write_object_contents
) (bfd
*abfd
)
408 struct internal_exec
*execp
= exec_hdr (abfd
);
410 /* We must make certain that the magic number has been set. This
411 will normally have been done by set_section_contents, but only if
412 there actually are some section contents. */
413 if (! abfd
->output_has_begun
)
414 NAME (aout
, adjust_sizes_and_vmas
) (abfd
);
416 obj_reloc_entry_size (abfd
) = RELOC_SIZE
;
418 return WRITE_HEADERS (abfd
, execp
);
421 /* Swap the information in an executable header @var{raw_bytes} taken
422 from a raw byte stream memory image into the internal exec header
423 structure "execp". */
425 #ifndef NAME_swap_exec_header_in
427 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
428 struct external_exec
*bytes
,
429 struct internal_exec
*execp
)
431 /* The internal_exec structure has some fields that are unused in this
432 configuration (IE for i960), so ensure that all such uninitialized
433 fields are zero'd out. There are places where two of these structs
434 are memcmp'd, and thus the contents do matter. */
435 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
436 /* Now fill in fields in the execp, from the bytes in the raw data. */
437 execp
->a_info
= GET_MAGIC (abfd
, bytes
->e_info
);
438 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
439 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
440 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
441 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
442 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
444 if (GET_WORD (abfd
, bytes
->e_flag
) & A_FLAG_RELOC_STRIPPED
)
451 execp
->a_trsize
= execp
->a_text
;
452 execp
->a_drsize
= execp
->a_data
;
455 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
458 /* Swap the information in an internal exec header structure
459 "execp" into the buffer "bytes" ready for writing to disk. */
461 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
462 struct internal_exec
*execp
,
463 struct external_exec
*bytes
)
465 const char *err
= NULL
;
467 #define MAXVAL(x) ((UINT64_C (1) << (8 * sizeof (x) - 1) << 1) - 1)
468 if ((val
= execp
->a_text
) > MAXVAL (bytes
->e_text
))
470 else if ((val
= execp
->a_data
) > MAXVAL (bytes
->e_data
))
472 else if ((val
= execp
->a_bss
) > MAXVAL (bytes
->e_bss
))
474 else if ((val
= execp
->a_syms
) > MAXVAL (bytes
->e_syms
))
476 else if ((val
= execp
->a_entry
) > MAXVAL (bytes
->e_entry
))
481 _bfd_error_handler (_("%pB: %#" PRIx64
" overflows header %s field"),
483 bfd_set_error (bfd_error_file_too_big
);
487 /* Now fill in fields in the raw data, from the fields in the exec struct. */
488 PUT_MAGIC (abfd
, execp
->a_info
, bytes
->e_info
);
489 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
490 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
491 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
492 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
493 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
494 PUT_WORD (abfd
, 0, bytes
->e_unused
);
496 if ((execp
->a_trsize
== 0 || execp
->a_text
== 0)
497 && (execp
->a_drsize
== 0 || execp
->a_data
== 0))
498 PUT_WORD (abfd
, A_FLAG_RELOC_STRIPPED
, bytes
->e_flag
);
499 else if (execp
->a_trsize
== execp
->a_text
500 && execp
->a_drsize
== execp
->a_data
)
501 PUT_WORD (abfd
, 0, bytes
->e_flag
);
504 /* TODO: print a proper warning message. */
505 fprintf (stderr
, "BFD:%s:%d: internal error\n", __FILE__
, __LINE__
);
506 PUT_WORD (abfd
, 0, bytes
->e_flag
);
511 /* Make all the section for an a.out file. */
514 NAME (aout
, make_sections
) (bfd
*abfd
)
516 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
518 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
520 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
525 /* Some a.out variant thinks that the file open in ABFD
526 checking is an a.out file. Do some more checking, and set up
527 for access if it really is. Call back to the calling
528 environment's "finish up" function just before returning, to
529 handle any last-minute setup. */
532 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
533 struct internal_exec
*execp
,
534 bfd_cleanup (*callback_to_real_object_p
) (bfd
*))
536 struct aout_data_struct
*rawptr
, *oldrawptr
;
538 size_t amt
= sizeof (struct aout_data_struct
);
540 rawptr
= bfd_zalloc (abfd
, amt
);
544 oldrawptr
= abfd
->tdata
.aout_data
;
545 abfd
->tdata
.aout_data
= rawptr
;
547 /* Copy the contents of the old tdata struct. */
548 if (oldrawptr
!= NULL
)
549 *abfd
->tdata
.aout_data
= *oldrawptr
;
551 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
552 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
; /* Copy in the internal_exec struct. */
553 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
555 /* Set the file flags. */
556 abfd
->flags
= BFD_NO_FLAGS
;
557 if (execp
->a_drsize
|| execp
->a_trsize
)
558 abfd
->flags
|= HAS_RELOC
;
559 /* Setting of EXEC_P has been deferred to the bottom of this function. */
561 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
562 if (N_DYNAMIC (execp
))
563 abfd
->flags
|= DYNAMIC
;
565 if (N_MAGIC (execp
) == ZMAGIC
)
567 abfd
->flags
|= D_PAGED
| WP_TEXT
;
568 adata (abfd
).magic
= z_magic
;
570 else if (N_MAGIC (execp
) == NMAGIC
)
572 abfd
->flags
|= WP_TEXT
;
573 adata (abfd
).magic
= n_magic
;
575 else if (N_MAGIC (execp
) == OMAGIC
)
576 adata (abfd
).magic
= o_magic
;
577 else if (N_MAGIC (execp
) == IMAGIC
)
578 adata (abfd
).magic
= i_magic
;
581 /* Should have been checked with N_BADMAG before this routine
586 abfd
->start_address
= execp
->a_entry
;
588 obj_aout_symbols (abfd
) = NULL
;
589 abfd
->symcount
= execp
->a_syms
/ sizeof (struct external_nlist
);
591 /* The default relocation entry size is that of traditional V7 Unix. */
592 obj_reloc_entry_size (abfd
) = RELOC_SIZE
;
594 /* The default symbol entry size is that of traditional Unix. */
595 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
598 bfd_init_window (&obj_aout_sym_window (abfd
));
599 bfd_init_window (&obj_aout_string_window (abfd
));
602 obj_aout_external_syms (abfd
) = NULL
;
603 obj_aout_external_strings (abfd
) = NULL
;
604 obj_aout_sym_hashes (abfd
) = NULL
;
606 if (! NAME (aout
, make_sections
) (abfd
))
609 obj_datasec (abfd
)->size
= execp
->a_data
;
610 obj_bsssec (abfd
)->size
= execp
->a_bss
;
612 obj_textsec (abfd
)->flags
=
613 (execp
->a_trsize
!= 0
614 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
615 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
616 obj_datasec (abfd
)->flags
=
617 (execp
->a_drsize
!= 0
618 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
619 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
620 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
622 #ifdef THIS_IS_ONLY_DOCUMENTATION
623 /* The common code can't fill in these things because they depend
624 on either the start address of the text segment, the rounding
625 up of virtual addresses between segments, or the starting file
626 position of the text segment -- all of which varies among different
627 versions of a.out. */
629 /* Call back to the format-dependent code to fill in the rest of the
630 fields and do any further cleanup. Things that should be filled
631 in by the callback: */
632 struct exec
*execp
= exec_hdr (abfd
);
634 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
635 /* Data and bss are already filled in since they're so standard. */
637 /* The virtual memory addresses of the sections. */
638 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
639 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
640 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
642 /* The file offsets of the sections. */
643 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
644 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
646 /* The file offsets of the relocation info. */
647 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
648 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
650 /* The file offsets of the string table and symbol table. */
651 obj_str_filepos (abfd
) = N_STROFF (execp
);
652 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
654 /* Determine the architecture and machine type of the object file. */
655 abfd
->obj_arch
= bfd_arch_obscure
;
657 adata(abfd
)->page_size
= TARGET_PAGE_SIZE
;
658 adata(abfd
)->segment_size
= SEGMENT_SIZE
;
659 adata(abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
661 return _bfd_no_cleanup
;
663 /* The architecture is encoded in various ways in various a.out variants,
664 or is not encoded at all in some of them. The relocation size depends
665 on the architecture and the a.out variant. Finally, the return value
666 is the bfd_target vector in use. If an error occurs, return zero and
667 set bfd_error to the appropriate error code.
669 Formats such as b.out, which have additional fields in the a.out
670 header, should cope with them in this callback as well. */
671 #endif /* DOCUMENTATION */
673 cleanup
= (*callback_to_real_object_p
)(abfd
);
675 /* Now that the segment addresses have been worked out, take a better
676 guess at whether the file is executable. If the entry point
677 is within the text segment, assume it is. (This makes files
678 executable even if their entry point address is 0, as long as
679 their text starts at zero.).
681 This test had to be changed to deal with systems where the text segment
682 runs at a different location than the default. The problem is that the
683 entry address can appear to be outside the text segment, thus causing an
684 erroneous conclusion that the file isn't executable.
686 To fix this, we now accept any non-zero entry point as an indication of
687 executability. This will work most of the time, since only the linker
688 sets the entry point, and that is likely to be non-zero for most systems. */
690 if (execp
->a_entry
!= 0
691 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
692 && execp
->a_entry
< (obj_textsec (abfd
)->vma
693 + obj_textsec (abfd
)->size
)
694 && execp
->a_trsize
== 0
695 && execp
->a_drsize
== 0))
696 abfd
->flags
|= EXEC_P
;
700 struct stat stat_buf
;
702 /* The original heuristic doesn't work in some important cases.
703 The a.out file has no information about the text start
704 address. For files (like kernels) linked to non-standard
705 addresses (ld -Ttext nnn) the entry point may not be between
706 the default text start (obj_textsec(abfd)->vma) and
707 (obj_textsec(abfd)->vma) + text size. This is not just a mach
708 issue. Many kernels are loaded at non standard addresses. */
709 if (abfd
->iostream
!= NULL
710 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
711 && (fstat(fileno((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
712 && ((stat_buf
.st_mode
& 0111) != 0))
713 abfd
->flags
|= EXEC_P
;
715 #endif /* STAT_FOR_EXEC */
720 abfd
->tdata
.aout_data
= oldrawptr
;
725 /* Initialize ABFD for use with a.out files. */
728 NAME (aout
, mkobject
) (bfd
*abfd
)
730 struct aout_data_struct
*rawptr
;
731 size_t amt
= sizeof (struct aout_data_struct
);
733 bfd_set_error (bfd_error_system_call
);
735 /* Use an intermediate variable for clarity. */
736 rawptr
= bfd_zalloc (abfd
, amt
);
741 abfd
->tdata
.aout_data
= rawptr
;
742 exec_hdr (abfd
) = &(rawptr
->e
);
744 obj_textsec (abfd
) = NULL
;
745 obj_datasec (abfd
) = NULL
;
746 obj_bsssec (abfd
) = NULL
;
751 /* Keep track of machine architecture and machine type for
752 a.out's. Return the <<machine_type>> for a particular
753 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
754 and machine can't be represented in a.out format.
756 If the architecture is understood, machine type 0 (default)
757 is always understood. */
760 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
761 unsigned long machine
,
764 enum machine_type arch_flags
;
766 arch_flags
= M_UNKNOWN
;
773 || machine
== bfd_mach_sparc
774 || machine
== bfd_mach_sparc_sparclite
775 || machine
== bfd_mach_sparc_v9
)
776 arch_flags
= M_SPARC
;
777 else if (machine
== bfd_mach_sparc_sparclet
)
778 arch_flags
= M_SPARCLET
;
783 || machine
== bfd_mach_i386_i386
784 || machine
== bfd_mach_i386_i386_intel_syntax
)
789 if (machine
== 0) arch_flags
= M_ARM
;
797 case bfd_mach_mips3000
:
798 arch_flags
= M_MIPS1
;
800 case bfd_mach_mips4000
: /* MIPS3 */
801 case bfd_mach_mips4400
:
802 case bfd_mach_mips8000
: /* MIPS4 */
803 case bfd_mach_mips6000
: /* Real MIPS2: */
804 arch_flags
= M_MIPS2
;
807 arch_flags
= M_UNKNOWN
;
815 case 0: arch_flags
= M_NS32532
; break;
816 case 32032: arch_flags
= M_NS32032
; break;
817 case 32532: arch_flags
= M_NS32532
; break;
818 default: arch_flags
= M_UNKNOWN
; break;
823 /* TODO: arch_flags = M_PDP11; */
832 arch_flags
= M_UNKNOWN
;
835 if (arch_flags
!= M_UNKNOWN
)
841 /* Set the architecture and the machine of the ABFD to the
842 values ARCH and MACHINE. Verify that @ABFD's format
843 can support the architecture required. */
846 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
847 enum bfd_architecture arch
,
848 unsigned long machine
)
850 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
853 if (arch
!= bfd_arch_unknown
)
857 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
862 obj_reloc_entry_size (abfd
) = RELOC_SIZE
;
864 return (*aout_backend_info(abfd
)->set_sizes
) (abfd
);
868 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
870 file_ptr pos
= adata (abfd
).exec_bytes_size
;
873 asection
*text
= obj_textsec (abfd
);
874 asection
*data
= obj_datasec (abfd
);
875 asection
*bss
= obj_bsssec (abfd
);
879 if (!text
->user_set_vma
)
884 pos
+= execp
->a_text
;
885 vma
+= execp
->a_text
;
888 if (!data
->user_set_vma
)
896 execp
->a_text
+= pad
;
903 if (!bss
->user_set_vma
)
909 else if (data
->size
> 0 || bss
->size
> 0) /* PR25677: for objcopy --extract-symbol */
911 /* The VMA of the .bss section is set by the VMA of the
912 .data section plus the size of the .data section. We may
913 need to add padding bytes to make this true. */
914 pad
= bss
->vma
- vma
;
919 execp
->a_data
= data
->size
+ pad
;
921 execp
->a_bss
= bss
->size
;
923 N_SET_MAGIC (execp
, OMAGIC
);
927 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
929 bfd_size_type data_pad
, text_pad
;
931 const struct aout_backend_data
*abdp
;
932 /* TRUE if text includes exec header. */
934 asection
*text
= obj_textsec (abfd
);
935 asection
*data
= obj_datasec (abfd
);
936 asection
*bss
= obj_bsssec (abfd
);
938 abdp
= aout_backend_info (abfd
);
942 && (abdp
->text_includes_header
943 || obj_aout_subformat (abfd
) == q_magic_format
));
944 text
->filepos
= (ztih
945 ? adata (abfd
).exec_bytes_size
946 : adata (abfd
).zmagic_disk_block_size
);
947 if (!text
->user_set_vma
)
949 /* ?? Do we really need to check for relocs here? */
950 text
->vma
= ((abfd
->flags
& HAS_RELOC
)
953 ? abdp
->default_text_vma
+ adata (abfd
).exec_bytes_size
954 : abdp
->default_text_vma
));
959 /* The .text section is being loaded at an unusual address. We
960 may need to pad it such that the .data section starts at a page
963 text_pad
= ((text
->filepos
- text
->vma
)
964 & (adata (abfd
).page_size
- 1));
966 text_pad
= (-text
->vma
967 & (adata (abfd
).page_size
- 1));
970 /* Find start of data. */
973 text_end
= text
->filepos
+ execp
->a_text
;
974 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
978 /* Note that if page_size == zmagic_disk_block_size, then
979 filepos == page_size, and this case is the same as the ztih
981 text_end
= execp
->a_text
;
982 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
983 text_end
+= text
->filepos
;
985 execp
->a_text
+= text_pad
;
988 if (!data
->user_set_vma
)
991 vma
= text
->vma
+ execp
->a_text
;
992 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
994 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
996 text_pad
= data
->vma
- (text
->vma
+ execp
->a_text
);
997 /* Only pad the text section if the data
998 section is going to be placed after it. */
1000 execp
->a_text
+= text_pad
;
1002 data
->filepos
= text
->filepos
+ execp
->a_text
;
1004 /* Fix up exec header while we're at it. */
1005 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1006 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1007 N_SET_MAGIC (execp
, ZMAGIC
);
1009 /* Spec says data section should be rounded up to page boundary. */
1010 execp
->a_data
= align_power (data
->size
, bss
->alignment_power
);
1011 execp
->a_data
= BFD_ALIGN (execp
->a_data
, adata (abfd
).page_size
);
1012 data_pad
= execp
->a_data
- data
->size
;
1015 if (!bss
->user_set_vma
)
1016 bss
->vma
= data
->vma
+ execp
->a_data
;
1017 /* If the BSS immediately follows the data section and extra space
1018 in the page is left after the data section, fudge data
1019 in the header so that the bss section looks smaller by that
1020 amount. We'll start the bss section there, and lie to the OS.
1021 (Note that a linker script, as well as the above assignment,
1022 could have explicitly set the BSS vma to immediately follow
1023 the data section.) */
1024 if (align_power (bss
->vma
, bss
->alignment_power
) == data
->vma
+ execp
->a_data
)
1025 execp
->a_bss
= data_pad
> bss
->size
? 0 : bss
->size
- data_pad
;
1027 execp
->a_bss
= bss
->size
;
1031 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1033 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1036 asection
*text
= obj_textsec (abfd
);
1037 asection
*data
= obj_datasec (abfd
);
1038 asection
*bss
= obj_bsssec (abfd
);
1041 text
->filepos
= pos
;
1042 if (!text
->user_set_vma
)
1046 pos
+= execp
->a_text
;
1047 vma
+= execp
->a_text
;
1050 data
->filepos
= pos
;
1051 if (!data
->user_set_vma
)
1052 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1055 /* Since BSS follows data immediately, see if it needs alignment. */
1057 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1058 execp
->a_data
= data
->size
+ pad
;
1059 pos
+= execp
->a_data
;
1062 if (!bss
->user_set_vma
)
1067 /* Fix up exec header. */
1068 execp
->a_bss
= bss
->size
;
1069 N_SET_MAGIC (execp
, NMAGIC
);
1073 adjust_i_magic (bfd
*abfd
, struct internal_exec
*execp
)
1075 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1078 asection
*text
= obj_textsec (abfd
);
1079 asection
*data
= obj_datasec (abfd
);
1080 asection
*bss
= obj_bsssec (abfd
);
1083 text
->filepos
= pos
;
1084 if (!text
->user_set_vma
)
1088 pos
+= execp
->a_text
;
1091 data
->filepos
= pos
;
1092 if (!data
->user_set_vma
)
1096 /* Since BSS follows data immediately, see if it needs alignment. */
1098 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1099 execp
->a_data
= data
->size
+ pad
;
1100 pos
+= execp
->a_data
;
1103 if (!bss
->user_set_vma
)
1108 /* Fix up exec header. */
1109 execp
->a_bss
= bss
->size
;
1110 N_SET_MAGIC (execp
, IMAGIC
);
1114 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1116 struct internal_exec
*execp
= exec_hdr (abfd
);
1118 if (! NAME (aout
, make_sections
) (abfd
))
1121 if (adata (abfd
).magic
!= undecided_magic
)
1124 execp
->a_text
= align_power (obj_textsec (abfd
)->size
,
1125 obj_textsec (abfd
)->alignment_power
);
1127 /* Rule (heuristic) for when to pad to a new page. Note that there
1128 are (at least) two ways demand-paged (ZMAGIC) files have been
1129 handled. Most Berkeley-based systems start the text segment at
1130 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1131 segment right after the exec header; the latter is counted in the
1132 text segment size, and is paged in by the kernel with the rest of
1135 /* This perhaps isn't the right way to do this, but made it simpler for me
1136 to understand enough to implement it. Better would probably be to go
1137 right from BFD flags to alignment/positioning characteristics. But the
1138 old code was sloppy enough about handling the flags, and had enough
1139 other magic, that it was a little hard for me to understand. I think
1140 I understand it better now, but I haven't time to do the cleanup this
1144 adata (abfd
).magic
= i_magic
;
1145 else if (abfd
->flags
& WP_TEXT
)
1146 adata (abfd
).magic
= n_magic
;
1148 adata (abfd
).magic
= o_magic
;
1150 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1152 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1154 switch (adata (abfd
).magic
)
1156 case n_magic
: str
= "NMAGIC"; break;
1157 case o_magic
: str
= "OMAGIC"; break;
1158 case i_magic
: str
= "IMAGIC"; break;
1159 case z_magic
: str
= "ZMAGIC"; break;
1164 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1165 obj_textsec (abfd
)->alignment_power
,
1166 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1167 obj_datasec (abfd
)->alignment_power
,
1168 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1169 obj_bsssec (abfd
)->alignment_power
);
1173 switch (adata (abfd
).magic
)
1176 adjust_o_magic (abfd
, execp
);
1179 adjust_z_magic (abfd
, execp
);
1182 adjust_n_magic (abfd
, execp
);
1185 adjust_i_magic (abfd
, execp
);
1191 #ifdef BFD_AOUT_DEBUG
1192 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1193 obj_textsec (abfd
)->vma
, execp
->a_text
,
1194 obj_textsec (abfd
)->filepos
,
1195 obj_datasec (abfd
)->vma
, execp
->a_data
,
1196 obj_datasec (abfd
)->filepos
,
1197 obj_bsssec (abfd
)->vma
, execp
->a_bss
);
1203 /* Called by the BFD in response to a bfd_make_section request. */
1206 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1208 /* Align to double at least. */
1209 newsect
->alignment_power
= bfd_get_arch_info(abfd
)->section_align_power
;
1211 if (bfd_get_format (abfd
) == bfd_object
)
1213 if (obj_textsec (abfd
) == NULL
1214 && !strcmp (newsect
->name
, ".text"))
1216 obj_textsec(abfd
)= newsect
;
1217 newsect
->target_index
= N_TEXT
;
1219 else if (obj_datasec (abfd
) == NULL
1220 && !strcmp (newsect
->name
, ".data"))
1222 obj_datasec (abfd
) = newsect
;
1223 newsect
->target_index
= N_DATA
;
1225 else if (obj_bsssec (abfd
) == NULL
1226 && !strcmp (newsect
->name
, ".bss"))
1228 obj_bsssec (abfd
) = newsect
;
1229 newsect
->target_index
= N_BSS
;
1233 /* We allow more than three sections internally. */
1234 return _bfd_generic_new_section_hook (abfd
, newsect
);
1238 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1240 const void * location
,
1242 bfd_size_type count
)
1244 if (! abfd
->output_has_begun
)
1246 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1250 if (section
== obj_bsssec (abfd
))
1252 bfd_set_error (bfd_error_no_contents
);
1256 if (section
!= obj_textsec (abfd
)
1257 && section
!= obj_datasec (abfd
))
1260 /* xgettext:c-format */
1261 (_("%pB: can not represent section `%pA' in a.out object file format"),
1263 bfd_set_error (bfd_error_nonrepresentable_section
);
1269 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1270 || bfd_write (location
, count
, abfd
) != count
)
1277 /* Read the external symbols from an a.out file. */
1280 aout_get_external_symbols (bfd
*abfd
)
1282 if (obj_aout_external_syms (abfd
) == NULL
)
1284 bfd_size_type count
;
1285 struct external_nlist
*syms
;
1287 count
= exec_hdr (abfd
)->a_syms
/ EXTERNAL_NLIST_SIZE
;
1289 /* PR 17512: file: 011f5a08. */
1292 obj_aout_external_syms (abfd
) = NULL
;
1293 obj_aout_external_sym_count (abfd
) = count
;
1298 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
),
1299 exec_hdr (abfd
)->a_syms
,
1300 &obj_aout_sym_window (abfd
), true))
1302 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1304 /* We allocate using malloc to make the values easy to free
1305 later on. If we put them on the objalloc it might not be
1306 possible to free them. */
1307 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0)
1309 syms
= (struct external_nlist
*)
1310 _bfd_malloc_and_read (abfd
, count
* EXTERNAL_NLIST_SIZE
,
1311 count
* EXTERNAL_NLIST_SIZE
);
1316 obj_aout_external_syms (abfd
) = syms
;
1317 obj_aout_external_sym_count (abfd
) = count
;
1320 if (obj_aout_external_strings (abfd
) == NULL
1321 && exec_hdr (abfd
)->a_syms
!= 0)
1323 unsigned char string_chars
[BYTES_IN_LONG
];
1324 bfd_size_type stringsize
;
1326 bfd_size_type amt
= BYTES_IN_LONG
;
1328 /* Get the size of the strings. */
1329 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1330 || bfd_read (string_chars
, amt
, abfd
) != amt
)
1332 stringsize
= H_GET_32 (abfd
, string_chars
);
1333 if (stringsize
== 0)
1335 else if (stringsize
< BYTES_IN_LONG
1336 || (size_t) stringsize
!= stringsize
)
1338 bfd_set_error (bfd_error_bad_value
);
1343 if (stringsize
>= BYTES_IN_LONG
)
1345 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
+ 1,
1346 &obj_aout_string_window (abfd
), true))
1348 strings
= (char *) obj_aout_string_window (abfd
).data
;
1353 strings
= (char *) bfd_malloc (stringsize
+ 1);
1354 if (strings
== NULL
)
1357 if (stringsize
>= BYTES_IN_LONG
)
1359 amt
= stringsize
- BYTES_IN_LONG
;
1360 if (bfd_read (strings
+ BYTES_IN_LONG
, amt
, abfd
) != amt
)
1367 /* Ensure that a zero index yields an empty string. */
1368 if (stringsize
>= BYTES_IN_WORD
)
1369 memset (strings
, 0, BYTES_IN_LONG
);
1371 /* Ensure that the string buffer is NUL terminated. */
1372 strings
[stringsize
] = 0;
1374 obj_aout_external_strings (abfd
) = strings
;
1375 obj_aout_external_string_size (abfd
) = stringsize
;
1381 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1382 and symbol->value fields of CACHE_PTR will be set from the a.out
1383 nlist structure. This function is responsible for setting
1384 symbol->flags and symbol->section, and adjusting symbol->value. */
1387 translate_from_native_sym_flags (bfd
*abfd
,
1388 aout_symbol_type
*cache_ptr
)
1392 if (is_stab (cache_ptr
->type
, cache_ptr
->symbol
.name
))
1396 /* This is a debugging symbol. */
1397 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1399 /* Work out the symbol section. */
1400 switch (cache_ptr
->type
)
1408 sec
= obj_textsec (abfd
);
1412 sec
= obj_datasec (abfd
);
1416 sec
= obj_bsssec (abfd
);
1419 sec
= bfd_abs_section_ptr
;
1423 cache_ptr
->symbol
.section
= sec
;
1424 cache_ptr
->symbol
.value
-= sec
->vma
;
1429 /* Get the default visibility. This does not apply to all types, so
1430 we just hold it in a local variable to use if wanted. */
1431 if ((cache_ptr
->type
& N_EXT
) == 0)
1432 visible
= BSF_LOCAL
;
1434 visible
= BSF_GLOBAL
;
1436 switch (cache_ptr
->type
)
1439 case N_ABS
: case N_ABS
| N_EXT
:
1440 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1441 cache_ptr
->symbol
.flags
= visible
;
1444 case N_UNDF
| N_EXT
:
1445 if (cache_ptr
->symbol
.value
!= 0)
1447 /* This is a common symbol. */
1448 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1449 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1453 cache_ptr
->symbol
.flags
= 0;
1454 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1458 case N_TEXT
: case N_TEXT
| N_EXT
:
1459 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1460 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1461 cache_ptr
->symbol
.flags
= visible
;
1464 case N_DATA
: case N_DATA
| N_EXT
:
1465 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1466 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1467 cache_ptr
->symbol
.flags
= visible
;
1470 case N_BSS
: case N_BSS
| N_EXT
:
1471 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1472 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1473 cache_ptr
->symbol
.flags
= visible
;
1480 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1483 translate_to_native_sym_flags (bfd
*abfd
,
1485 struct external_nlist
*sym_pointer
)
1487 bfd_vma value
= cache_ptr
->value
;
1490 const char *name
= cache_ptr
->name
!= NULL
? cache_ptr
->name
: "*unknown*";
1492 /* Mask out any existing type bits in case copying from one section
1494 if (!is_stab (sym_pointer
->e_type
[0], name
))
1495 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1497 sec
= bfd_asymbol_section (cache_ptr
);
1502 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1505 /* xgettext:c-format */
1506 (_("%pB: can not represent section for symbol `%s' in a.out object file format"),
1508 bfd_set_error (bfd_error_nonrepresentable_section
);
1512 if (sec
->output_section
!= NULL
)
1514 off
= sec
->output_offset
;
1515 sec
= sec
->output_section
;
1518 if (bfd_is_abs_section (sec
))
1519 sym_pointer
->e_type
[0] |= N_ABS
;
1520 else if (sec
== obj_textsec (abfd
))
1521 sym_pointer
->e_type
[0] |= N_TEXT
;
1522 else if (sec
== obj_datasec (abfd
))
1523 sym_pointer
->e_type
[0] |= N_DATA
;
1524 else if (sec
== obj_bsssec (abfd
))
1525 sym_pointer
->e_type
[0] |= N_BSS
;
1526 else if (bfd_is_und_section (sec
))
1527 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1528 else if (bfd_is_com_section (sec
))
1529 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1533 /* xgettext:c-format */
1534 (_("%pB: can not represent section `%pA' in a.out object file format"),
1536 bfd_set_error (bfd_error_nonrepresentable_section
);
1540 /* Turn the symbol from section relative to absolute again */
1541 value
+= sec
->vma
+ off
;
1543 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1544 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1545 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1546 sym_pointer
->e_type
[0] |= N_EXT
;
1548 PUT_WORD(abfd
, value
, sym_pointer
->e_value
);
1553 /* Native-level interface to symbols. */
1556 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1558 size_t amt
= sizeof (aout_symbol_type
);
1559 aout_symbol_type
*new_symbol_type
= bfd_zalloc (abfd
, amt
);
1561 if (!new_symbol_type
)
1563 new_symbol_type
->symbol
.the_bfd
= abfd
;
1565 return &new_symbol_type
->symbol
;
1568 /* Translate a set of external symbols into internal symbols. */
1571 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1572 aout_symbol_type
*in
,
1573 struct external_nlist
*ext
,
1574 bfd_size_type count
,
1576 bfd_size_type strsize
,
1579 struct external_nlist
*ext_end
;
1581 ext_end
= ext
+ count
;
1582 for (; ext
< ext_end
; ext
++, in
++)
1587 x
= GET_WORD (abfd
, ext
->e_strx
);
1588 in
->symbol
.the_bfd
= abfd
;
1590 /* For the normal symbols, the zero index points at the number
1591 of bytes in the string table but is to be interpreted as the
1592 null string. For the dynamic symbols, the number of bytes in
1593 the string table is stored in the __DYNAMIC structure and the
1594 zero index points at an actual string. */
1595 if (x
== 0 && ! dynamic
)
1596 in
->symbol
.name
= "";
1597 else if (x
< strsize
)
1598 in
->symbol
.name
= str
+ x
;
1602 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1603 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1604 bfd_set_error (bfd_error_bad_value
);
1608 ovly
= H_GET_8 (abfd
, ext
->e_ovly
);
1612 (_("%pB: symbol indicates overlay (not supported)"), abfd
);
1613 bfd_set_error (bfd_error_bad_value
);
1617 in
->symbol
.value
= GET_WORD (abfd
, ext
->e_value
);
1618 /* e_desc is zero for normal symbols but for .stab symbols it
1619 carries the desc field in our extended 2.11BSD format. */
1620 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1622 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1623 in
->symbol
.udata
.p
= NULL
;
1625 if (! translate_from_native_sym_flags (abfd
, in
))
1629 in
->symbol
.flags
|= BSF_DYNAMIC
;
1635 /* We read the symbols into a buffer, which is discarded when this
1636 function exits. We read the strings into a buffer large enough to
1637 hold them all plus all the cached symbol entries. */
1640 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1642 struct external_nlist
*old_external_syms
;
1643 aout_symbol_type
*cached
;
1644 bfd_size_type cached_size
;
1646 /* If there's no work to be done, don't do any. */
1647 if (obj_aout_symbols (abfd
) != NULL
)
1650 old_external_syms
= obj_aout_external_syms (abfd
);
1652 if (! aout_get_external_symbols (abfd
))
1655 cached_size
= obj_aout_external_sym_count (abfd
);
1656 cached_size
*= sizeof (aout_symbol_type
);
1657 cached
= bfd_zmalloc (cached_size
);
1658 if (cached
== NULL
&& cached_size
!= 0)
1661 /* Convert from external symbol information to internal. */
1662 if (! (NAME (aout
, translate_symbol_table
)
1664 obj_aout_external_syms (abfd
),
1665 obj_aout_external_sym_count (abfd
),
1666 obj_aout_external_strings (abfd
),
1667 obj_aout_external_string_size (abfd
),
1674 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
1676 obj_aout_symbols (abfd
) = cached
;
1678 /* It is very likely that anybody who calls this function will not
1679 want the external symbol information, so if it was allocated
1680 because of our call to aout_get_external_symbols, we free it up
1681 right away to save space. */
1682 if (old_external_syms
== NULL
1683 && obj_aout_external_syms (abfd
) != NULL
)
1686 bfd_free_window (&obj_aout_sym_window (abfd
));
1688 free (obj_aout_external_syms (abfd
));
1690 obj_aout_external_syms (abfd
) = NULL
;
1696 /* We use a hash table when writing out symbols so that we only write
1697 out a particular string once. This helps particularly when the
1698 linker writes out stabs debugging entries, because each different
1699 contributing object file tends to have many duplicate stabs
1702 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1703 if BFD_TRADITIONAL_FORMAT is set. */
1705 /* Get the index of a string in a strtab, adding it if it is not
1708 static inline bfd_size_type
1709 add_to_stringtab (bfd
*abfd
,
1710 struct bfd_strtab_hash
*tab
,
1715 bfd_size_type str_index
;
1717 /* An index of 0 always means the empty string. */
1718 if (str
== 0 || *str
== '\0')
1721 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1722 doesn't understand a hashed string table. */
1724 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1727 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1729 if (str_index
!= (bfd_size_type
) -1)
1730 /* Add BYTES_IN_LONG to the return value to account for the
1731 space taken up by the string table size. */
1732 str_index
+= BYTES_IN_LONG
;
1737 /* Write out a strtab. ABFD is already at the right location in the
1741 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1743 bfd_byte buffer
[BYTES_IN_LONG
];
1745 /* The string table starts with the size. */
1746 H_PUT_32 (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_LONG
, buffer
);
1747 if (bfd_write (buffer
, BYTES_IN_LONG
, abfd
) != BYTES_IN_LONG
)
1750 return _bfd_stringtab_emit (abfd
, tab
);
1754 NAME (aout
, write_syms
) (bfd
*abfd
)
1756 unsigned int count
;
1757 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1758 struct bfd_strtab_hash
*strtab
;
1760 strtab
= _bfd_stringtab_init ();
1764 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1766 asymbol
*g
= generic
[count
];
1768 struct external_nlist nsp
;
1770 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, false);
1771 if (indx
== (bfd_size_type
) -1)
1773 PUT_WORD (abfd
, indx
, nsp
.e_strx
);
1775 if (bfd_asymbol_flavour(g
) == abfd
->xvec
->flavour
)
1777 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1778 H_PUT_8 (abfd
, 0, nsp
.e_ovly
);
1779 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1783 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1784 H_PUT_8 (abfd
, 0, nsp
.e_ovly
);
1785 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1788 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1791 if (bfd_write (&nsp
, EXTERNAL_NLIST_SIZE
, abfd
) != EXTERNAL_NLIST_SIZE
)
1794 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1795 here, at the end. */
1799 if (! emit_stringtab (abfd
, strtab
))
1802 _bfd_stringtab_free (strtab
);
1807 _bfd_stringtab_free (strtab
);
1813 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1815 unsigned int counter
= 0;
1816 aout_symbol_type
*symbase
;
1818 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1821 for (symbase
= obj_aout_symbols (abfd
); counter
++ < bfd_get_symcount (abfd
);)
1822 *(location
++) = (asymbol
*)(symbase
++);
1824 return bfd_get_symcount (abfd
);
1828 /* Output extended relocation information to a file in target byte order. */
1831 pdp11_aout_swap_reloc_out (bfd
*abfd
, arelent
*g
, bfd_byte
*natptr
)
1837 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1838 asection
*output_section
= sym
->section
->output_section
;
1841 fprintf (stderr
, "BFD: can't do this reloc addend stuff\n");
1843 r_pcrel
= g
->howto
->pc_relative
;
1845 if (bfd_is_abs_section (output_section
))
1847 else if (output_section
== obj_textsec (abfd
))
1849 else if (output_section
== obj_datasec (abfd
))
1851 else if (output_section
== obj_bsssec (abfd
))
1853 else if (bfd_is_und_section (output_section
))
1855 else if (bfd_is_com_section (output_section
))
1860 BFD_ASSERT (r_type
!= -1);
1865 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1867 reloc_entry
= r_index
<< 4 | r_type
| r_pcrel
;
1869 PUT_WORD (abfd
, reloc_entry
, natptr
);
1872 /* BFD deals internally with all things based from the section they're
1873 in. so, something in 10 bytes into a text section with a base of
1874 50 would have a symbol (.text+10) and know .text vma was 50.
1876 Aout keeps all it's symbols based from zero, so the symbol would
1877 contain 60. This macro subs the base of each section from the value
1878 to give the true offset from the section */
1881 #define MOVE_ADDRESS(ad) \
1884 /* Undefined symbol. */ \
1885 if (symbols != NULL && r_index < bfd_get_symcount (abfd)) \
1886 cache_ptr->sym_ptr_ptr = symbols + r_index; \
1888 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
1889 cache_ptr->addend = ad; \
1893 /* Defined, section relative. replace symbol with pointer to \
1894 symbol which points to section. */ \
1898 case N_TEXT | N_EXT: \
1899 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
1900 cache_ptr->addend = ad - su->textsec->vma; \
1903 case N_DATA | N_EXT: \
1904 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
1905 cache_ptr->addend = ad - su->datasec->vma; \
1908 case N_BSS | N_EXT: \
1909 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
1910 cache_ptr->addend = ad - su->bsssec->vma; \
1914 case N_ABS | N_EXT: \
1915 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
1916 cache_ptr->addend = ad; \
1922 pdp11_aout_swap_reloc_in (bfd
* abfd
,
1924 arelent
* cache_ptr
,
1925 bfd_size_type offset
,
1927 bfd_size_type symcount
)
1929 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
1930 unsigned int r_index
;
1935 reloc_entry
= GET_WORD (abfd
, (void *) bytes
);
1937 r_pcrel
= reloc_entry
& RELFLG
;
1939 cache_ptr
->address
= offset
;
1940 cache_ptr
->howto
= howto_table_pdp11
+ (r_pcrel
? 1 : 0);
1942 if ((reloc_entry
& RTYPE
) == RABS
)
1945 r_index
= RINDEX (reloc_entry
);
1947 /* r_extern reflects whether the symbol the reloc is against is
1949 r_extern
= (reloc_entry
& RTYPE
) == REXT
;
1951 if (r_extern
&& r_index
>= symcount
)
1953 /* We could arrange to return an error, but it might be useful
1954 to see the file even if it is bad. FIXME: Of course this
1955 means that objdump -r *doesn't* see the actual reloc, and
1956 objcopy silently writes a different reloc. */
1964 /* Read and swap the relocs for a section. */
1967 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
1970 bfd_size_type count
;
1971 bfd_size_type reloc_size
;
1973 arelent
*reloc_cache
;
1975 unsigned int counter
= 0;
1978 if (asect
->relocation
)
1981 if (asect
->flags
& SEC_CONSTRUCTOR
)
1984 if (asect
== obj_datasec (abfd
))
1985 reloc_size
= exec_hdr(abfd
)->a_drsize
;
1986 else if (asect
== obj_textsec (abfd
))
1987 reloc_size
= exec_hdr(abfd
)->a_trsize
;
1988 else if (asect
== obj_bsssec (abfd
))
1992 bfd_set_error (bfd_error_invalid_operation
);
1996 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
1998 relocs
= _bfd_malloc_and_read (abfd
, reloc_size
, reloc_size
);
1999 if (relocs
== NULL
&& reloc_size
!= 0)
2002 each_size
= obj_reloc_entry_size (abfd
);
2003 count
= reloc_size
/ each_size
;
2005 /* Count the number of NON-ZERO relocs, this is the count we want. */
2007 unsigned int real_count
= 0;
2009 for (counter
= 0; counter
< count
; counter
++)
2013 x
= GET_WORD (abfd
, (char *) relocs
+ each_size
* counter
);
2021 reloc_cache
= bfd_zmalloc (count
* sizeof (arelent
));
2022 if (reloc_cache
== NULL
&& count
!= 0)
2025 cache_ptr
= reloc_cache
;
2030 counter
++, rptr
+= RELOC_SIZE
, cache_ptr
++)
2032 while (GET_WORD (abfd
, (void *) rptr
) == 0)
2035 if ((char *) rptr
>= (char *) relocs
+ reloc_size
)
2039 pdp11_aout_swap_reloc_in (abfd
, rptr
, cache_ptr
,
2040 (bfd_size_type
) ((char *) rptr
- (char *) relocs
),
2042 (bfd_size_type
) bfd_get_symcount (abfd
));
2045 /* Just in case, if rptr >= relocs + reloc_size should happen
2047 BFD_ASSERT (counter
== count
);
2051 asect
->relocation
= reloc_cache
;
2052 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2057 /* Write out a relocation section into an object file. */
2060 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2063 unsigned char *native
;
2064 unsigned int count
= section
->reloc_count
;
2065 bfd_size_type natsize
;
2067 natsize
= section
->size
;
2068 native
= bfd_zalloc (abfd
, natsize
);
2072 generic
= section
->orelocation
;
2073 if (generic
!= NULL
)
2079 if ((*generic
)->howto
== NULL
2080 || (*generic
)->sym_ptr_ptr
== NULL
)
2082 bfd_set_error (bfd_error_invalid_operation
);
2083 _bfd_error_handler (_("%pB: attempt to write out "
2084 "unknown reloc type"), abfd
);
2085 bfd_release (abfd
, native
);
2088 r
= native
+ (*generic
)->address
;
2089 pdp11_aout_swap_reloc_out (abfd
, *generic
, r
);
2095 if (bfd_write (native
, natsize
, abfd
) != natsize
)
2097 bfd_release (abfd
, native
);
2101 bfd_release (abfd
, native
);
2105 /* This is stupid. This function should be a boolean predicate. */
2108 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2113 arelent
*tblptr
= section
->relocation
;
2116 if (section
== obj_bsssec (abfd
))
2122 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
)(abfd
, section
, symbols
)))
2125 if (section
->flags
& SEC_CONSTRUCTOR
)
2127 arelent_chain
*chain
= section
->constructor_chain
;
2129 for (count
= 0; count
< section
->reloc_count
; count
++)
2131 *relptr
++ = &chain
->relent
;
2132 chain
= chain
->next
;
2137 tblptr
= section
->relocation
;
2139 for (count
= 0; count
++ < section
->reloc_count
;)
2140 *relptr
++ = tblptr
++;
2145 return section
->reloc_count
;
2149 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2153 if (asect
->flags
& SEC_CONSTRUCTOR
)
2154 count
= asect
->reloc_count
;
2155 else if (asect
== obj_datasec (abfd
))
2156 count
= exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
2157 else if (asect
== obj_textsec (abfd
))
2158 count
= exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
2159 else if (asect
== obj_bsssec (abfd
))
2163 bfd_set_error (bfd_error_invalid_operation
);
2167 if (count
>= LONG_MAX
/ sizeof (arelent
*)
2168 || _bfd_mul_overflow (count
, obj_reloc_entry_size (abfd
), &raw
))
2170 bfd_set_error (bfd_error_file_too_big
);
2173 if (!bfd_write_p (abfd
))
2175 ufile_ptr filesize
= bfd_get_file_size (abfd
);
2176 if (filesize
!= 0 && raw
> filesize
)
2178 bfd_set_error (bfd_error_file_truncated
);
2182 return (count
+ 1) * sizeof (arelent
*);
2187 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2189 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2192 return (bfd_get_symcount (abfd
) + 1) * (sizeof (aout_symbol_type
*));
2196 NAME (aout
, get_lineno
) (bfd
* abfd ATTRIBUTE_UNUSED
,
2197 asymbol
* symbol ATTRIBUTE_UNUSED
)
2203 NAME (aout
, get_symbol_info
) (bfd
* abfd ATTRIBUTE_UNUSED
,
2207 bfd_symbol_info (symbol
, ret
);
2209 if (ret
->type
== '?')
2211 int type_code
= aout_symbol(symbol
)->type
& 0xff;
2212 const char *stab_name
= bfd_get_stab_name (type_code
);
2213 static char buf
[10];
2215 if (stab_name
== NULL
)
2217 sprintf(buf
, "(%d)", type_code
);
2221 ret
->stab_type
= type_code
;
2222 ret
->stab_other
= (unsigned) (aout_symbol(symbol
)->other
& 0xff);
2223 ret
->stab_desc
= (unsigned) (aout_symbol(symbol
)->desc
& 0xffff);
2224 ret
->stab_name
= stab_name
;
2229 NAME (aout
, print_symbol
) (bfd
* abfd
,
2232 bfd_print_symbol_type how
)
2234 FILE *file
= (FILE *) afile
;
2238 case bfd_print_symbol_name
:
2240 fprintf(file
,"%s", symbol
->name
);
2242 case bfd_print_symbol_more
:
2243 fprintf(file
,"%4x %2x %2x",
2244 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2245 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2246 (unsigned) (aout_symbol (symbol
)->type
));
2248 case bfd_print_symbol_all
:
2250 const char *section_name
= symbol
->section
->name
;
2252 bfd_print_symbol_vandf (abfd
, (void *) file
, symbol
);
2254 fprintf (file
," %-5s %04x %02x %02x",
2256 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2257 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2258 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2260 fprintf(file
," %s", symbol
->name
);
2266 /* If we don't have to allocate more than 1MB to hold the generic
2267 symbols, we use the generic minisymbol method: it's faster, since
2268 it only translates the symbols once, not multiple times. */
2269 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2271 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2272 symbols. The minisymbol_to_symbol function translates these into
2273 BFD asymbol structures. */
2276 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2279 unsigned int *sizep
)
2282 /* We could handle the dynamic symbols here as well, but it's
2283 easier to hand them off. */
2284 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2286 if (! aout_get_external_symbols (abfd
))
2289 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2290 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2292 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2294 /* By passing the external symbols back from this routine, we are
2295 giving up control over the memory block. Clear
2296 obj_aout_external_syms, so that we do not try to free it
2298 obj_aout_external_syms (abfd
) = NULL
;
2300 *sizep
= EXTERNAL_NLIST_SIZE
;
2301 return obj_aout_external_sym_count (abfd
);
2304 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2305 unmodified a.out symbol. The SYM argument is a structure returned
2306 by bfd_make_empty_symbol, which we fill in here. */
2309 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2311 const void * minisym
,
2315 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2316 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2318 memset (sym
, 0, sizeof (aout_symbol_type
));
2320 /* We call translate_symbol_table to translate a single symbol. */
2321 if (! (NAME (aout
, translate_symbol_table
)
2323 (aout_symbol_type
*) sym
,
2324 (struct external_nlist
*) minisym
,
2326 obj_aout_external_strings (abfd
),
2327 obj_aout_external_string_size (abfd
),
2334 /* Provided a BFD, a section and an offset into the section, calculate
2335 and return the name of the source file and the line nearest to the
2339 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2343 const char **filename_ptr
,
2344 const char **functionname_ptr
,
2345 unsigned int *line_ptr
,
2346 unsigned int *discriminator_ptr
)
2348 /* Run down the file looking for the filename, function and linenumber. */
2350 const char *directory_name
= NULL
;
2351 const char *main_file_name
= NULL
;
2352 const char *current_file_name
= NULL
;
2353 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2354 bfd_vma low_line_vma
= 0;
2355 bfd_vma low_func_vma
= 0;
2357 size_t filelen
, funclen
;
2360 *filename_ptr
= bfd_get_filename (abfd
);
2361 *functionname_ptr
= NULL
;
2363 if (discriminator_ptr
)
2364 *discriminator_ptr
= 0;
2366 if (symbols
!= NULL
)
2368 for (p
= symbols
; *p
; p
++)
2370 aout_symbol_type
*q
= (aout_symbol_type
*)(*p
);
2375 /* If this looks like a file name symbol, and it comes after
2376 the line number we have found so far, but before the
2377 offset, then we have probably not found the right line
2379 if (q
->symbol
.value
<= offset
2380 && ((q
->symbol
.value
> low_line_vma
2381 && (line_file_name
!= NULL
2383 || (q
->symbol
.value
> low_func_vma
2386 const char * symname
;
2388 symname
= q
->symbol
.name
;
2391 && strlen (symname
) > 2
2392 && strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2394 if (q
->symbol
.value
> low_line_vma
)
2397 line_file_name
= NULL
;
2399 if (q
->symbol
.value
> low_func_vma
)
2406 /* If this symbol is less than the offset, but greater than
2407 the line number we have found so far, then we have not
2408 found the right line number. */
2409 if (q
->symbol
.value
<= offset
)
2411 if (q
->symbol
.value
> low_line_vma
)
2414 line_file_name
= NULL
;
2416 if (q
->symbol
.value
> low_func_vma
)
2420 main_file_name
= current_file_name
= q
->symbol
.name
;
2421 /* Look ahead to next symbol to check if that too is an N_SO. */
2425 q
= (aout_symbol_type
*)(*p
);
2426 if (q
->type
!= (int) N_SO
)
2429 /* Found a second N_SO First is directory; second is filename. */
2430 directory_name
= current_file_name
;
2431 main_file_name
= current_file_name
= q
->symbol
.name
;
2432 if (obj_textsec(abfd
) != section
)
2436 current_file_name
= q
->symbol
.name
;
2442 /* We'll keep this if it resolves nearer than the one we have
2444 if (q
->symbol
.value
>= low_line_vma
2445 && q
->symbol
.value
<= offset
)
2447 *line_ptr
= q
->desc
;
2448 low_line_vma
= q
->symbol
.value
;
2449 line_file_name
= current_file_name
;
2455 /* We'll keep this if it is nearer than the one we have already. */
2456 if (q
->symbol
.value
>= low_func_vma
&&
2457 q
->symbol
.value
<= offset
)
2459 low_func_vma
= q
->symbol
.value
;
2460 func
= (asymbol
*) q
;
2462 else if (q
->symbol
.value
> offset
)
2472 main_file_name
= line_file_name
;
2474 if (main_file_name
== NULL
2475 || main_file_name
[0] == '/'
2476 || directory_name
== NULL
)
2479 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2483 funclen
= strlen (bfd_asymbol_name (func
));
2485 free (adata (abfd
).line_buf
);
2486 if (filelen
+ funclen
== 0)
2487 adata (abfd
).line_buf
= buf
= NULL
;
2490 buf
= bfd_malloc ((bfd_size_type
) filelen
+ funclen
+ 3);
2491 adata (abfd
).line_buf
= buf
;
2496 if (main_file_name
!= NULL
)
2498 if (main_file_name
[0] == '/' || directory_name
== NULL
)
2499 *filename_ptr
= main_file_name
;
2503 /* PR binutils/20891: In a corrupt input file both
2504 main_file_name and directory_name can be empty... */
2505 * filename_ptr
= NULL
;
2508 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2510 *filename_ptr
= buf
;
2518 const char *function
= func
->name
;
2523 /* PR binutils/20892: In a corrupt input file func can be empty. */
2524 * functionname_ptr
= NULL
;
2527 /* The caller expects a symbol name. We actually have a
2528 function name, without the leading underscore. Put the
2529 underscore back in, so that the caller gets a symbol name. */
2530 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2531 strcpy (buf
, function
);
2534 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2535 strcpy (buf
+ 1, function
);
2538 /* Have to remove : stuff. */
2539 colon
= strchr (buf
, ':');
2542 *functionname_ptr
= buf
;
2549 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2550 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2552 return adata (abfd
).exec_bytes_size
;
2555 /* Throw away most malloc'd and alloc'd information for this BFD. */
2558 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2560 if ((bfd_get_format (abfd
) == bfd_object
2561 || bfd_get_format (abfd
) == bfd_core
)
2562 && abfd
->tdata
.aout_data
!= NULL
)
2564 #define BFCI_FREE(x) do { free (x); x = NULL; } while (0)
2565 BFCI_FREE (adata (abfd
).line_buf
);
2566 BFCI_FREE (obj_aout_symbols (abfd
));
2568 obj_aout_external_syms (abfd
) = 0;
2569 bfd_free_window (&obj_aout_sym_window (abfd
));
2570 bfd_free_window (&obj_aout_string_window (abfd
));
2571 obj_aout_external_strings (abfd
) = 0;
2573 BFCI_FREE (obj_aout_external_syms (abfd
));
2574 BFCI_FREE (obj_aout_external_strings (abfd
));
2576 for (asection
*o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2577 BFCI_FREE (o
->relocation
);
2581 return _bfd_generic_bfd_free_cached_info (abfd
);
2584 /* Routine to create an entry in an a.out link hash table. */
2586 struct bfd_hash_entry
*
2587 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2588 struct bfd_hash_table
*table
,
2591 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2593 /* Allocate the structure if it has not already been allocated by a
2596 ret
= bfd_hash_allocate (table
, sizeof (* ret
));
2600 /* Call the allocation method of the superclass. */
2601 ret
= (struct aout_link_hash_entry
*)
2602 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
);
2605 /* Set local fields. */
2606 ret
->written
= false;
2610 return (struct bfd_hash_entry
*) ret
;
2613 /* Initialize an a.out link hash table. */
2616 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2618 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
2619 struct bfd_hash_table
*,
2621 unsigned int entsize
)
2623 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2626 /* Create an a.out link hash table. */
2628 struct bfd_link_hash_table
*
2629 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2631 struct aout_link_hash_table
*ret
;
2632 size_t amt
= sizeof (struct aout_link_hash_table
);
2634 ret
= bfd_malloc (amt
);
2637 if (! NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2638 NAME (aout
, link_hash_newfunc
),
2639 sizeof (struct aout_link_hash_entry
)))
2647 /* Free up the internal symbols read from an a.out file. */
2650 aout_link_free_symbols (bfd
*abfd
)
2652 if (obj_aout_external_syms (abfd
) != NULL
)
2655 bfd_free_window (&obj_aout_sym_window (abfd
));
2657 free ((void *) obj_aout_external_syms (abfd
));
2659 obj_aout_external_syms (abfd
) = NULL
;
2662 if (obj_aout_external_strings (abfd
) != NULL
)
2665 bfd_free_window (&obj_aout_string_window (abfd
));
2667 free ((void *) obj_aout_external_strings (abfd
));
2669 obj_aout_external_strings (abfd
) = NULL
;
2674 /* Given an a.out BFD, add symbols to the global hash table as
2678 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
2680 switch (bfd_get_format (abfd
))
2683 return aout_link_add_object_symbols (abfd
, info
);
2685 return _bfd_generic_link_add_archive_symbols
2686 (abfd
, info
, aout_link_check_archive_element
);
2688 bfd_set_error (bfd_error_wrong_format
);
2693 /* Add symbols from an a.out object file. */
2696 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2698 if (! aout_get_external_symbols (abfd
))
2700 if (! aout_link_add_symbols (abfd
, info
))
2702 if (! info
->keep_memory
)
2704 if (! aout_link_free_symbols (abfd
))
2710 /* Look through the internal symbols to see if this object file should
2711 be included in the link. We should include this object file if it
2712 defines any symbols which are currently undefined. If this object
2713 file defines a common symbol, then we may adjust the size of the
2714 known symbol but we do not include the object file in the link
2715 (unless there is some other reason to include it). */
2718 aout_link_check_ar_symbols (bfd
*abfd
,
2719 struct bfd_link_info
*info
,
2723 struct external_nlist
*p
;
2724 struct external_nlist
*pend
;
2729 /* Look through all the symbols. */
2730 p
= obj_aout_external_syms (abfd
);
2731 pend
= p
+ obj_aout_external_sym_count (abfd
);
2732 strings
= obj_aout_external_strings (abfd
);
2733 for (; p
< pend
; p
++)
2735 int type
= H_GET_8 (abfd
, p
->e_type
);
2736 const char *name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2737 struct bfd_link_hash_entry
*h
;
2739 /* Ignore symbols that are not externally visible. This is an
2740 optimization only, as we check the type more thoroughly
2742 if ((type
& N_EXT
) == 0
2743 || is_stab(type
, name
)
2747 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2749 /* We are only interested in symbols that are currently
2750 undefined or common. */
2752 || (h
->type
!= bfd_link_hash_undefined
2753 && h
->type
!= bfd_link_hash_common
))
2756 if (type
== (N_TEXT
| N_EXT
)
2757 || type
== (N_DATA
| N_EXT
)
2758 || type
== (N_BSS
| N_EXT
)
2759 || type
== (N_ABS
| N_EXT
))
2761 /* This object file defines this symbol. We must link it
2762 in. This is true regardless of whether the current
2763 definition of the symbol is undefined or common. If the
2764 current definition is common, we have a case in which we
2765 have already seen an object file including
2767 and this object file from the archive includes
2769 In such a case we must include this object file.
2771 FIXME: The SunOS 4.1.3 linker will pull in the archive
2772 element if the symbol is defined in the .data section,
2773 but not if it is defined in the .text section. That
2774 seems a bit crazy to me, and I haven't implemented it.
2775 However, it might be correct. */
2776 if (!(*info
->callbacks
2777 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2783 if (type
== (N_UNDF
| N_EXT
))
2787 value
= GET_WORD (abfd
, p
->e_value
);
2790 /* This symbol is common in the object from the archive
2792 if (h
->type
== bfd_link_hash_undefined
)
2797 symbfd
= h
->u
.undef
.abfd
;
2800 /* This symbol was created as undefined from
2801 outside BFD. We assume that we should link
2802 in the object file. This is done for the -u
2803 option in the linker. */
2804 if (!(*info
->callbacks
2805 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2810 /* Turn the current link symbol into a common
2811 symbol. It is already on the undefs list. */
2812 h
->type
= bfd_link_hash_common
;
2813 h
->u
.c
.p
= bfd_hash_allocate (&info
->hash
->table
,
2814 sizeof (struct bfd_link_hash_common_entry
));
2815 if (h
->u
.c
.p
== NULL
)
2818 h
->u
.c
.size
= value
;
2820 /* FIXME: This isn't quite right. The maximum
2821 alignment of a common symbol should be set by the
2822 architecture of the output file, not of the input
2824 power
= bfd_log2 (value
);
2825 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
2826 power
= bfd_get_arch_info (abfd
)->section_align_power
;
2827 h
->u
.c
.p
->alignment_power
= power
;
2829 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
2834 /* Adjust the size of the common symbol if
2836 if (value
> h
->u
.c
.size
)
2837 h
->u
.c
.size
= value
;
2843 /* We do not need this object file. */
2847 /* Check a single archive element to see if we need to include it in
2848 the link. *PNEEDED is set according to whether this element is
2849 needed in the link or not. This is called from
2850 _bfd_generic_link_add_archive_symbols. */
2853 aout_link_check_archive_element (bfd
*abfd
,
2854 struct bfd_link_info
*info
,
2855 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
2856 const char *name ATTRIBUTE_UNUSED
,
2862 if (!aout_get_external_symbols (abfd
))
2866 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
2872 /* Potentially, the add_archive_element hook may have set a
2873 substitute BFD for us. */
2876 if (!info
->keep_memory
2877 && !aout_link_free_symbols (oldbfd
))
2879 if (!aout_get_external_symbols (abfd
))
2882 if (!aout_link_add_symbols (abfd
, info
))
2886 if (!info
->keep_memory
|| !needed
)
2888 if (!aout_link_free_symbols (abfd
))
2895 /* Add all symbols from an object file to the hash table. */
2898 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2900 bool (*add_one_symbol
)
2901 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2902 bfd_vma
, const char *, bool, bool, struct bfd_link_hash_entry
**);
2903 struct external_nlist
*syms
;
2904 bfd_size_type sym_count
;
2907 struct aout_link_hash_entry
**sym_hash
;
2908 struct external_nlist
*p
;
2909 struct external_nlist
*pend
;
2911 syms
= obj_aout_external_syms (abfd
);
2912 sym_count
= obj_aout_external_sym_count (abfd
);
2913 strings
= obj_aout_external_strings (abfd
);
2914 if (info
->keep_memory
)
2919 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
2921 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
2922 (abfd
, info
, &syms
, &sym_count
, &strings
)))
2926 /* We keep a list of the linker hash table entries that correspond
2927 to particular symbols. We could just look them up in the hash
2928 table, but keeping the list is more efficient. Perhaps this
2929 should be conditional on info->keep_memory. */
2930 sym_hash
= bfd_alloc (abfd
,
2931 sym_count
* sizeof (struct aout_link_hash_entry
*));
2932 if (sym_hash
== NULL
&& sym_count
!= 0)
2934 obj_aout_sym_hashes (abfd
) = sym_hash
;
2936 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
2937 if (add_one_symbol
== NULL
)
2938 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
2941 pend
= p
+ sym_count
;
2942 for (; p
< pend
; p
++, sym_hash
++)
2953 type
= H_GET_8 (abfd
, p
->e_type
);
2955 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
2956 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
2958 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2960 /* Ignore debugging symbols. */
2961 if (is_stab (type
, name
))
2964 value
= GET_WORD (abfd
, p
->e_value
);
2970 /* Shouldn't be any types not covered. */
2981 /* Ignore symbols that are not externally visible. */
2984 case N_UNDF
| N_EXT
:
2987 section
= bfd_und_section_ptr
;
2991 section
= bfd_com_section_ptr
;
2994 section
= bfd_abs_section_ptr
;
2996 case N_TEXT
| N_EXT
:
2997 section
= obj_textsec (abfd
);
2998 value
-= bfd_section_vma (section
);
3000 case N_DATA
| N_EXT
:
3001 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3002 translate_from_native_sym_flags. */
3003 section
= obj_datasec (abfd
);
3004 value
-= bfd_section_vma (section
);
3007 section
= obj_bsssec (abfd
);
3008 value
-= bfd_section_vma (section
);
3012 if (! ((*add_one_symbol
)
3013 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
3014 (struct bfd_link_hash_entry
**) sym_hash
)))
3017 /* Restrict the maximum alignment of a common symbol based on
3018 the architecture, since a.out has no way to represent
3019 alignment requirements of a section in a .o file. FIXME:
3020 This isn't quite right: it should use the architecture of the
3021 output file, not the input files. */
3022 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3023 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3024 bfd_get_arch_info (abfd
)->section_align_power
))
3025 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3026 bfd_get_arch_info (abfd
)->section_align_power
;
3028 /* If this is a set symbol, and we are not building sets, then
3029 it is possible for the hash entry to not have been set. In
3030 such a case, treat the symbol as not globally defined. */
3031 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3033 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3041 /* Look up an entry in an the header file hash table. */
3043 #define aout_link_includes_lookup(table, string, create, copy) \
3044 ((struct aout_link_includes_entry *) \
3045 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3047 /* The function to create a new entry in the header file hash table. */
3049 static struct bfd_hash_entry
*
3050 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3051 struct bfd_hash_table
*table
,
3054 struct aout_link_includes_entry
* ret
=
3055 (struct aout_link_includes_entry
*) entry
;
3057 /* Allocate the structure if it has not already been allocated by a
3060 ret
= bfd_hash_allocate (table
,
3061 sizeof (struct aout_link_includes_entry
));
3065 /* Call the allocation method of the superclass. */
3066 ret
= ((struct aout_link_includes_entry
*)
3067 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3069 /* Set local fields. */
3072 return (struct bfd_hash_entry
*) ret
;
3075 /* Write out a symbol that was not associated with an a.out input
3079 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3081 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3082 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3086 struct external_nlist outsym
;
3090 if (h
->root
.type
== bfd_link_hash_warning
)
3092 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3093 if (h
->root
.type
== bfd_link_hash_new
)
3097 output_bfd
= flaginfo
->output_bfd
;
3099 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3101 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3102 (output_bfd
, flaginfo
->info
, h
)))
3104 /* FIXME: No way to handle errors. */
3114 /* An indx of -2 means the symbol must be written. */
3116 && (flaginfo
->info
->strip
== strip_all
3117 || (flaginfo
->info
->strip
== strip_some
3118 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3119 false, false) == NULL
)))
3122 switch (h
->root
.type
)
3126 /* Avoid variable not initialized warnings. */
3128 case bfd_link_hash_new
:
3129 /* This can happen for set symbols when sets are not being
3132 case bfd_link_hash_undefined
:
3133 type
= N_UNDF
| N_EXT
;
3136 case bfd_link_hash_defined
:
3137 case bfd_link_hash_defweak
:
3141 sec
= h
->root
.u
.def
.section
->output_section
;
3142 BFD_ASSERT (bfd_is_abs_section (sec
)
3143 || sec
->owner
== output_bfd
);
3144 if (sec
== obj_textsec (output_bfd
))
3145 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3146 else if (sec
== obj_datasec (output_bfd
))
3147 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3148 else if (sec
== obj_bsssec (output_bfd
))
3149 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3151 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3153 val
= (h
->root
.u
.def
.value
3155 + h
->root
.u
.def
.section
->output_offset
);
3158 case bfd_link_hash_common
:
3159 type
= N_UNDF
| N_EXT
;
3160 val
= h
->root
.u
.c
.size
;
3162 case bfd_link_hash_undefweak
:
3166 case bfd_link_hash_indirect
:
3167 case bfd_link_hash_warning
:
3168 /* FIXME: Ignore these for now. The circumstances under which
3169 they should be written out are not clear to me. */
3173 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3174 H_PUT_8 (output_bfd
, 0, outsym
.e_ovly
);
3175 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3177 if (indx
== (bfd_size_type
) -1)
3178 /* FIXME: No way to handle errors. */
3181 PUT_WORD (output_bfd
, 0, outsym
.e_desc
);
3182 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3183 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3185 amt
= EXTERNAL_NLIST_SIZE
;
3186 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3187 || bfd_write (&outsym
, amt
, output_bfd
) != amt
)
3188 /* FIXME: No way to handle errors. */
3191 flaginfo
->symoff
+= amt
;
3192 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3193 ++obj_aout_external_sym_count (output_bfd
);
3198 /* Handle a link order which is supposed to generate a reloc. */
3201 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3203 struct bfd_link_order
*p
)
3205 struct bfd_link_order_reloc
*pr
;
3208 reloc_howto_type
*howto
;
3209 file_ptr
*reloff_ptr
;
3210 struct reloc_std_external srel
;
3212 bfd_size_type rel_size
;
3216 if (p
->type
== bfd_section_reloc_link_order
)
3219 if (bfd_is_abs_section (pr
->u
.section
))
3220 r_index
= N_ABS
| N_EXT
;
3223 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3224 r_index
= pr
->u
.section
->target_index
;
3229 struct aout_link_hash_entry
*h
;
3231 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3233 h
= ((struct aout_link_hash_entry
*)
3234 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3235 pr
->u
.name
, false, false, true));
3241 /* We decided to strip this symbol, but it turns out that we
3242 can't. Note that we lose the other and desc information
3243 here. I don't think that will ever matter for a global
3247 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3253 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3254 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3259 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3262 bfd_set_error (bfd_error_bad_value
);
3266 if (o
== obj_textsec (flaginfo
->output_bfd
))
3267 reloff_ptr
= &flaginfo
->treloff
;
3268 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3269 reloff_ptr
= &flaginfo
->dreloff
;
3274 MY_put_reloc(flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3284 fprintf (stderr
, "TODO: line %d in bfd/pdp11.c\n", __LINE__
);
3286 r_pcrel
= howto
->pc_relative
;
3287 r_baserel
= (howto
->type
& 8) != 0;
3288 r_jmptable
= (howto
->type
& 16) != 0;
3289 r_relative
= (howto
->type
& 32) != 0;
3290 r_length
= bfd_log2 (bfd_get_reloc_size (howto
));
3292 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3293 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3295 srel
.r_index
[0] = r_index
>> 16;
3296 srel
.r_index
[1] = r_index
>> 8;
3297 srel
.r_index
[2] = r_index
;
3299 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3300 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3301 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3302 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3303 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3304 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3308 srel
.r_index
[2] = r_index
>> 16;
3309 srel
.r_index
[1] = r_index
>> 8;
3310 srel
.r_index
[0] = r_index
;
3312 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3313 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3314 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3315 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3316 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3317 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3321 rel_ptr
= (void *) &srel
;
3323 /* We have to write the addend into the object file, since
3324 standard a.out relocs are in place. It would be more
3325 reliable if we had the current contents of the file here,
3326 rather than assuming zeroes, but we can't read the file since
3327 it was opened using bfd_openw. */
3328 if (pr
->addend
!= 0)
3331 bfd_reloc_status_type r
;
3335 size
= bfd_get_reloc_size (howto
);
3336 buf
= bfd_zmalloc (size
);
3337 if (buf
== NULL
&& size
!= 0)
3339 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3346 case bfd_reloc_outofrange
:
3348 case bfd_reloc_overflow
:
3349 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3350 (flaginfo
->info
, NULL
,
3351 (p
->type
== bfd_section_reloc_link_order
3352 ? bfd_section_name (pr
->u
.section
)
3354 howto
->name
, pr
->addend
, NULL
,
3355 (asection
*) NULL
, (bfd_vma
) 0);
3358 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
,
3360 (file_ptr
) p
->offset
,
3367 rel_size
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3368 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3369 || bfd_write (rel_ptr
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
3372 *reloff_ptr
+= rel_size
;
3374 /* Assert that the relocs have not run into the symbols, and that n
3375 the text relocs have not run into the data relocs. */
3376 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3377 && (reloff_ptr
!= &flaginfo
->treloff
3379 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3384 /* Get the section corresponding to a reloc index. */
3386 static inline asection
*
3387 aout_reloc_type_to_section (bfd
*abfd
, int type
)
3391 case RTEXT
: return obj_textsec (abfd
);
3392 case RDATA
: return obj_datasec (abfd
);
3393 case RBSS
: return obj_bsssec (abfd
);
3394 case RABS
: return bfd_abs_section_ptr
;
3395 case REXT
: return bfd_und_section_ptr
;
3401 pdp11_aout_link_input_section (struct aout_final_link_info
*flaginfo
,
3403 asection
*input_section
,
3405 bfd_size_type rel_size
,
3408 bool (*check_dynamic_reloc
)
3409 (struct bfd_link_info
*, bfd
*, asection
*,
3410 struct aout_link_hash_entry
*, void *, bfd_byte
*, bool *, bfd_vma
*);
3413 struct external_nlist
*syms
;
3415 struct aout_link_hash_entry
**sym_hashes
;
3420 output_bfd
= flaginfo
->output_bfd
;
3421 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3423 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_SIZE
);
3424 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
3425 == output_bfd
->xvec
->header_byteorder
);
3427 relocatable
= bfd_link_relocatable (flaginfo
->info
);
3428 syms
= obj_aout_external_syms (input_bfd
);
3429 strings
= obj_aout_external_strings (input_bfd
);
3430 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
3431 symbol_map
= flaginfo
->symbol_map
;
3434 rel_end
= rel
+ rel_size
;
3435 for (; rel
< rel_end
; rel
+= RELOC_SIZE
)
3442 reloc_howto_type
*howto
;
3443 struct aout_link_hash_entry
*h
= NULL
;
3445 bfd_reloc_status_type r
;
3448 reloc_entry
= GET_WORD (input_bfd
, (void *) rel
);
3449 if (reloc_entry
== 0)
3453 unsigned int howto_idx
;
3455 r_index
= (reloc_entry
& RIDXMASK
) >> 4;
3456 r_type
= reloc_entry
& RTYPE
;
3457 r_pcrel
= reloc_entry
& RELFLG
;
3458 r_addr
= (char *) rel
- (char *) relocs
;
3460 r_extern
= (r_type
== REXT
);
3462 howto_idx
= r_pcrel
;
3463 if (howto_idx
< TABLE_SIZE (howto_table_pdp11
))
3464 howto
= howto_table_pdp11
+ howto_idx
;
3467 _bfd_error_handler (_("%pB: unsupported relocation type"),
3469 bfd_set_error (bfd_error_bad_value
);
3476 /* We are generating a relocatable output file, and must
3477 modify the reloc accordingly. */
3480 /* If we know the symbol this relocation is against,
3481 convert it into a relocation against a section. This
3482 is what the native linker does. */
3483 h
= sym_hashes
[r_index
];
3485 && (h
->root
.type
== bfd_link_hash_defined
3486 || h
->root
.type
== bfd_link_hash_defweak
))
3488 asection
*output_section
;
3490 /* Compute a new r_index. */
3491 output_section
= h
->root
.u
.def
.section
->output_section
;
3492 if (output_section
== obj_textsec (output_bfd
))
3494 else if (output_section
== obj_datasec (output_bfd
))
3496 else if (output_section
== obj_bsssec (output_bfd
))
3501 /* Add the symbol value and the section VMA to the
3502 addend stored in the contents. */
3503 relocation
= (h
->root
.u
.def
.value
3504 + output_section
->vma
3505 + h
->root
.u
.def
.section
->output_offset
);
3509 /* We must change r_index according to the symbol
3511 r_index
= symbol_map
[r_index
];
3517 /* We decided to strip this symbol, but it
3518 turns out that we can't. Note that we
3519 lose the other and desc information here.
3520 I don't think that will ever matter for a
3526 if (!aout_link_write_other_symbol (&h
->root
.root
,
3536 name
= strings
+ GET_WORD (input_bfd
,
3537 syms
[r_index
].e_strx
);
3538 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3539 (flaginfo
->info
, name
, input_bfd
, input_section
,
3548 /* Write out the new r_index value. */
3549 reloc_entry
= GET_WORD (input_bfd
, rel
);
3550 reloc_entry
&= RIDXMASK
;
3551 reloc_entry
|= r_index
<< 4;
3552 PUT_WORD (input_bfd
, reloc_entry
, rel
);
3558 /* This is a relocation against a section. We must
3559 adjust by the amount that the section moved. */
3560 section
= aout_reloc_type_to_section (input_bfd
, r_type
);
3561 relocation
= (section
->output_section
->vma
3562 + section
->output_offset
3566 /* Change the address of the relocation. */
3567 fprintf (stderr
, "TODO: change the address of the relocation\n");
3569 /* Adjust a PC relative relocation by removing the reference
3570 to the original address in the section and including the
3571 reference to the new address. */
3573 relocation
-= (input_section
->output_section
->vma
3574 + input_section
->output_offset
3575 - input_section
->vma
);
3577 #ifdef MY_relocatable_reloc
3578 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
3581 if (relocation
== 0)
3584 r
= MY_relocate_contents (howto
,
3585 input_bfd
, relocation
,
3592 /* We are generating an executable, and must do a full
3597 h
= sym_hashes
[r_index
];
3600 && (h
->root
.type
== bfd_link_hash_defined
3601 || h
->root
.type
== bfd_link_hash_defweak
))
3603 relocation
= (h
->root
.u
.def
.value
3604 + h
->root
.u
.def
.section
->output_section
->vma
3605 + h
->root
.u
.def
.section
->output_offset
);
3608 && h
->root
.type
== bfd_link_hash_undefweak
)
3620 section
= aout_reloc_type_to_section (input_bfd
, r_type
);
3621 relocation
= (section
->output_section
->vma
3622 + section
->output_offset
3625 relocation
+= input_section
->vma
;
3628 if (check_dynamic_reloc
!= NULL
)
3632 if (! ((*check_dynamic_reloc
)
3633 (flaginfo
->info
, input_bfd
, input_section
, h
,
3634 (void *) rel
, contents
, &skip
, &relocation
)))
3640 /* Now warn if a global symbol is undefined. We could not
3641 do this earlier, because check_dynamic_reloc might want
3642 to skip this reloc. */
3643 if (hundef
&& ! bfd_link_pic (flaginfo
->info
))
3648 name
= h
->root
.root
.string
;
3650 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
3651 (*flaginfo
->info
->callbacks
->undefined_symbol
)
3652 (flaginfo
->info
, name
, input_bfd
, input_section
,
3656 r
= MY_final_link_relocate (howto
,
3657 input_bfd
, input_section
,
3658 contents
, r_addr
, relocation
,
3662 if (r
!= bfd_reloc_ok
)
3667 case bfd_reloc_outofrange
:
3669 case bfd_reloc_overflow
:
3676 name
= strings
+ GET_WORD (input_bfd
,
3677 syms
[r_index
].e_strx
);
3682 s
= aout_reloc_type_to_section (input_bfd
, r_type
);
3683 name
= bfd_section_name (s
);
3685 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3686 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3687 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
3697 /* Link an a.out section into the output file. */
3700 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
3702 asection
*input_section
,
3703 file_ptr
*reloff_ptr
,
3704 bfd_size_type rel_size
)
3706 bfd_size_type input_size
;
3709 /* Get the section contents. */
3710 input_size
= input_section
->size
;
3711 if (! bfd_get_section_contents (input_bfd
, input_section
,
3712 (void *) flaginfo
->contents
,
3713 (file_ptr
) 0, input_size
))
3716 /* Read in the relocs if we haven't already done it. */
3717 if (aout_section_data (input_section
) != NULL
3718 && aout_section_data (input_section
)->relocs
!= NULL
)
3719 relocs
= aout_section_data (input_section
)->relocs
;
3722 relocs
= flaginfo
->relocs
;
3725 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
3726 || bfd_read (relocs
, rel_size
, input_bfd
) != rel_size
)
3731 /* Relocate the section contents. */
3732 if (! pdp11_aout_link_input_section (flaginfo
, input_bfd
, input_section
,
3733 (bfd_byte
*) relocs
,
3734 rel_size
, flaginfo
->contents
))
3737 /* Write out the section contents. */
3738 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
3739 input_section
->output_section
,
3740 (void *) flaginfo
->contents
,
3741 (file_ptr
) input_section
->output_offset
,
3745 /* If we are producing relocatable output, the relocs were
3746 modified, and we now write them out. */
3747 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
3749 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
3751 if (bfd_write (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
3753 *reloff_ptr
+= rel_size
;
3755 /* Assert that the relocs have not run into the symbols, and
3756 that if these are the text relocs they have not run into the
3758 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3759 && (reloff_ptr
!= &flaginfo
->treloff
3761 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3767 /* Link an a.out input BFD into the output file. */
3770 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
3772 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
3774 /* If this is a dynamic object, it may need special handling. */
3775 if ((input_bfd
->flags
& DYNAMIC
) != 0
3776 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
3777 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
3778 (flaginfo
->info
, input_bfd
));
3780 /* Get the symbols. We probably have them already, unless
3781 flaginfo->info->keep_memory is FALSE. */
3782 if (! aout_get_external_symbols (input_bfd
))
3785 /* Write out the symbols and get a map of the new indices. The map
3786 is placed into flaginfo->symbol_map. */
3787 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
3790 /* Relocate and write out the sections. These functions use the
3791 symbol map created by aout_link_write_symbols. The linker_mark
3792 field will be set if these sections are to be included in the
3793 link, which will normally be the case. */
3794 if (obj_textsec (input_bfd
)->linker_mark
)
3796 if (! aout_link_input_section (flaginfo
, input_bfd
,
3797 obj_textsec (input_bfd
),
3799 exec_hdr (input_bfd
)->a_trsize
))
3802 if (obj_datasec (input_bfd
)->linker_mark
)
3804 if (! aout_link_input_section (flaginfo
, input_bfd
,
3805 obj_datasec (input_bfd
),
3807 exec_hdr (input_bfd
)->a_drsize
))
3811 /* If we are not keeping memory, we don't need the symbols any
3812 longer. We still need them if we are keeping memory, because the
3813 strings in the hash table point into them. */
3814 if (! flaginfo
->info
->keep_memory
)
3816 if (! aout_link_free_symbols (input_bfd
))
3823 /* Do the final link step. This is called on the output BFD. The
3824 INFO structure should point to a list of BFDs linked through the
3825 link.next field which can be used to find each BFD which takes part
3826 in the output. Also, each section in ABFD should point to a list
3827 of bfd_link_order structures which list all the input sections for
3828 the output section. */
3831 NAME (aout
, final_link
) (bfd
*abfd
,
3832 struct bfd_link_info
*info
,
3833 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
3835 struct aout_final_link_info aout_info
;
3836 bool includes_hash_initialized
= false;
3838 bfd_size_type trsize
, drsize
;
3839 bfd_size_type max_contents_size
;
3840 bfd_size_type max_relocs_size
;
3841 bfd_size_type max_sym_count
;
3842 struct bfd_link_order
*p
;
3844 bool have_link_order_relocs
;
3846 if (bfd_link_pic (info
))
3847 abfd
->flags
|= DYNAMIC
;
3849 separate_i_d
= info
->separate_code
;
3850 aout_info
.info
= info
;
3851 aout_info
.output_bfd
= abfd
;
3852 aout_info
.contents
= NULL
;
3853 aout_info
.relocs
= NULL
;
3854 aout_info
.symbol_map
= NULL
;
3855 aout_info
.output_syms
= NULL
;
3857 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
3858 aout_link_includes_newfunc
,
3859 sizeof (struct aout_link_includes_entry
),
3862 includes_hash_initialized
= true;
3864 /* Figure out the largest section size. Also, if generating
3865 relocatable output, count the relocs. */
3868 max_contents_size
= 0;
3869 max_relocs_size
= 0;
3871 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3875 if (bfd_link_relocatable (info
))
3877 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3879 trsize
+= exec_hdr (sub
)->a_trsize
;
3880 drsize
+= exec_hdr (sub
)->a_drsize
;
3884 /* FIXME: We need to identify the .text and .data sections
3885 and call get_reloc_upper_bound and canonicalize_reloc to
3886 work out the number of relocs needed, and then multiply
3887 by the reloc size. */
3889 /* xgettext:c-format */
3890 (_("%pB: relocatable link from %s to %s not supported"),
3891 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
3892 bfd_set_error (bfd_error_invalid_operation
);
3897 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3899 sz
= obj_textsec (sub
)->size
;
3900 if (sz
> max_contents_size
)
3901 max_contents_size
= sz
;
3902 sz
= obj_datasec (sub
)->size
;
3903 if (sz
> max_contents_size
)
3904 max_contents_size
= sz
;
3906 sz
= exec_hdr (sub
)->a_trsize
;
3907 if (sz
> max_relocs_size
)
3908 max_relocs_size
= sz
;
3909 sz
= exec_hdr (sub
)->a_drsize
;
3910 if (sz
> max_relocs_size
)
3911 max_relocs_size
= sz
;
3913 sz
= obj_aout_external_sym_count (sub
);
3914 if (sz
> max_sym_count
)
3919 if (bfd_link_relocatable (info
))
3921 if (obj_textsec (abfd
) != NULL
)
3922 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
3923 ->map_head
.link_order
)
3924 * obj_reloc_entry_size (abfd
));
3925 if (obj_datasec (abfd
) != NULL
)
3926 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
3927 ->map_head
.link_order
)
3928 * obj_reloc_entry_size (abfd
));
3931 exec_hdr (abfd
)->a_trsize
= trsize
;
3932 exec_hdr (abfd
)->a_drsize
= drsize
;
3933 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
3935 /* Adjust the section sizes and vmas according to the magic number.
3936 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3937 filepos for each section. */
3938 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
3941 /* The relocation and symbol file positions differ among a.out
3942 targets. We are passed a callback routine from the backend
3943 specific code to handle this.
3944 FIXME: At this point we do not know how much space the symbol
3945 table will require. This will not work for any (nonstandard)
3946 a.out target that needs to know the symbol table size before it
3947 can compute the relocation file positions. */
3948 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
3950 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
3951 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
3952 obj_sym_filepos (abfd
) = aout_info
.symoff
;
3954 /* We keep a count of the symbols as we output them. */
3955 obj_aout_external_sym_count (abfd
) = 0;
3957 /* We accumulate the string table as we write out the symbols. */
3958 aout_info
.strtab
= _bfd_stringtab_init ();
3959 if (aout_info
.strtab
== NULL
)
3962 /* Allocate buffers to hold section contents and relocs. */
3963 aout_info
.contents
= bfd_malloc (max_contents_size
);
3964 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
3965 aout_info
.symbol_map
= bfd_malloc (max_sym_count
* sizeof (int *));
3966 aout_info
.output_syms
= bfd_malloc ((max_sym_count
+ 1)
3967 * sizeof (struct external_nlist
));
3968 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
3969 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
3970 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
3971 || aout_info
.output_syms
== NULL
)
3974 /* If we have a symbol named __DYNAMIC, force it out now. This is
3975 required by SunOS. Doing this here rather than in sunos.c is a
3976 hack, but it's easier than exporting everything which would be
3979 struct aout_link_hash_entry
*h
;
3981 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
3982 false, false, false);
3984 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
3987 /* The most time efficient way to do the link would be to read all
3988 the input object files into memory and then sort out the
3989 information into the output file. Unfortunately, that will
3990 probably use too much memory. Another method would be to step
3991 through everything that composes the text section and write it
3992 out, and then everything that composes the data section and write
3993 it out, and then write out the relocs, and then write out the
3994 symbols. Unfortunately, that requires reading stuff from each
3995 input file several times, and we will not be able to keep all the
3996 input files open simultaneously, and reopening them will be slow.
3998 What we do is basically process one input file at a time. We do
3999 everything we need to do with an input file once--copy over the
4000 section contents, handle the relocation information, and write
4001 out the symbols--and then we throw away the information we read
4002 from it. This approach requires a lot of lseeks of the output
4003 file, which is unfortunate but still faster than reopening a lot
4006 We use the output_has_begun field of the input BFDs to see
4007 whether we have already handled it. */
4008 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
4009 sub
->output_has_begun
= false;
4011 /* Mark all sections which are to be included in the link. This
4012 will normally be every section. We need to do this so that we
4013 can identify any sections which the linker has decided to not
4015 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4017 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
4018 if (p
->type
== bfd_indirect_link_order
)
4019 p
->u
.indirect
.section
->linker_mark
= true;
4022 have_link_order_relocs
= false;
4023 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4025 for (p
= o
->map_head
.link_order
;
4029 if (p
->type
== bfd_indirect_link_order
4030 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
4031 == bfd_target_aout_flavour
))
4035 input_bfd
= p
->u
.indirect
.section
->owner
;
4036 if (! input_bfd
->output_has_begun
)
4038 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
4040 input_bfd
->output_has_begun
= true;
4043 else if (p
->type
== bfd_section_reloc_link_order
4044 || p
->type
== bfd_symbol_reloc_link_order
)
4045 /* These are handled below. */
4046 have_link_order_relocs
= true;
4049 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
4055 /* Write out any symbols that we have not already written out. */
4056 bfd_hash_traverse (&info
->hash
->table
,
4057 aout_link_write_other_symbol
,
4060 /* Now handle any relocs we were asked to create by the linker.
4061 These did not come from any input file. We must do these after
4062 we have written out all the symbols, so that we know the symbol
4064 if (have_link_order_relocs
)
4066 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4068 for (p
= o
->map_head
.link_order
;
4072 if (p
->type
== bfd_section_reloc_link_order
4073 || p
->type
== bfd_symbol_reloc_link_order
)
4075 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
4082 free (aout_info
.contents
);
4083 aout_info
.contents
= NULL
;
4084 free (aout_info
.relocs
);
4085 aout_info
.relocs
= NULL
;
4086 free (aout_info
.symbol_map
);
4087 aout_info
.symbol_map
= NULL
;
4088 free (aout_info
.output_syms
);
4089 aout_info
.output_syms
= NULL
;
4090 if (includes_hash_initialized
)
4092 bfd_hash_table_free (&aout_info
.includes
.root
);
4093 includes_hash_initialized
= false;
4096 /* Finish up any dynamic linking we may be doing. */
4097 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
4099 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
4103 /* Update the header information. */
4104 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
4105 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
4106 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
4107 obj_textsec (abfd
)->reloc_count
=
4108 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
4109 obj_datasec (abfd
)->reloc_count
=
4110 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
4112 /* Write out the string table, unless there are no symbols. */
4113 if (abfd
->symcount
> 0)
4115 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
4116 || ! emit_stringtab (abfd
, aout_info
.strtab
))
4119 else if (obj_textsec (abfd
)->reloc_count
== 0
4120 && obj_datasec (abfd
)->reloc_count
== 0)
4122 /* The layout of a typical a.out file is header, text, data,
4123 relocs, symbols, string table. When there are no relocs,
4124 symbols or string table, the last thing in the file is data
4125 and a_data may be rounded up. However we may have a smaller
4126 sized .data section and thus not written final padding. The
4127 same thing can happen with text if there is no data. Write
4128 final padding here to extend the file. */
4131 if (exec_hdr (abfd
)->a_data
> obj_datasec (abfd
)->size
)
4132 pos
= obj_datasec (abfd
)->filepos
+ exec_hdr (abfd
)->a_data
;
4133 else if (obj_datasec (abfd
)->size
== 0
4134 && exec_hdr (abfd
)->a_text
> obj_textsec (abfd
)->size
)
4135 pos
= obj_textsec (abfd
)->filepos
+ exec_hdr (abfd
)->a_text
;
4140 if (bfd_seek (abfd
, pos
- 1, SEEK_SET
) != 0
4141 || bfd_write (&b
, 1, abfd
) != 1)
4149 free (aout_info
.contents
);
4150 free (aout_info
.relocs
);
4151 free (aout_info
.symbol_map
);
4152 free (aout_info
.output_syms
);
4153 if (includes_hash_initialized
)
4154 bfd_hash_table_free (&aout_info
.includes
.root
);
4158 /* Adjust and write out the symbols for an a.out file. Set the new
4159 symbol indices into a symbol_map. */
4162 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4165 bfd_size_type sym_count
;
4167 enum bfd_link_strip strip
;
4168 enum bfd_link_discard discard
;
4169 struct external_nlist
*outsym
;
4170 bfd_size_type strtab_index
;
4171 struct external_nlist
*sym
;
4172 struct external_nlist
*sym_end
;
4173 struct aout_link_hash_entry
**sym_hash
;
4178 output_bfd
= flaginfo
->output_bfd
;
4179 sym_count
= obj_aout_external_sym_count (input_bfd
);
4180 strings
= obj_aout_external_strings (input_bfd
);
4181 strip
= flaginfo
->info
->strip
;
4182 discard
= flaginfo
->info
->discard
;
4183 outsym
= flaginfo
->output_syms
;
4185 /* First write out a symbol for this object file, unless we are
4186 discarding such symbols. */
4187 if (strip
!= strip_all
4188 && (strip
!= strip_some
4189 || bfd_hash_lookup (flaginfo
->info
->keep_hash
,
4190 bfd_get_filename (input_bfd
),
4191 false, false) != NULL
)
4192 && discard
!= discard_all
)
4194 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4195 H_PUT_8 (output_bfd
, 0, outsym
->e_ovly
);
4196 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4197 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4198 bfd_get_filename (input_bfd
), false);
4199 if (strtab_index
== (bfd_size_type
) -1)
4201 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4202 PUT_WORD (output_bfd
,
4203 (bfd_section_vma (obj_textsec (input_bfd
)->output_section
)
4204 + obj_textsec (input_bfd
)->output_offset
),
4206 ++obj_aout_external_sym_count (output_bfd
);
4212 sym
= obj_aout_external_syms (input_bfd
);
4213 sym_end
= sym
+ sym_count
;
4214 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4215 symbol_map
= flaginfo
->symbol_map
;
4216 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4217 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4221 struct aout_link_hash_entry
*h
;
4227 /* We set *symbol_map to 0 above for all symbols. If it has
4228 already been set to -1 for this symbol, it means that we are
4229 discarding it because it appears in a duplicate header file.
4230 See the N_BINCL code below. */
4231 if (*symbol_map
== -1)
4234 /* Initialize *symbol_map to -1, which means that the symbol was
4235 not copied into the output file. We will change it later if
4236 we do copy the symbol over. */
4239 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4240 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4246 /* Pass this symbol through. It is the target of an
4247 indirect or warning symbol. */
4248 val
= GET_WORD (input_bfd
, sym
->e_value
);
4253 /* Skip this symbol, which is the target of an indirect
4254 symbol that we have changed to no longer be an indirect
4261 struct aout_link_hash_entry
*hresolve
;
4263 /* We have saved the hash table entry for this symbol, if
4264 there is one. Note that we could just look it up again
4265 in the hash table, provided we first check that it is an
4269 /* Use the name from the hash table, in case the symbol was
4272 name
= h
->root
.root
.string
;
4274 /* If this is an indirect or warning symbol, then change
4275 hresolve to the base symbol. We also change *sym_hash so
4276 that the relocation routines relocate against the real
4280 && (h
->root
.type
== bfd_link_hash_indirect
4281 || h
->root
.type
== bfd_link_hash_warning
))
4283 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4284 while (hresolve
->root
.type
== bfd_link_hash_indirect
4285 || hresolve
->root
.type
== bfd_link_hash_warning
)
4286 hresolve
= ((struct aout_link_hash_entry
*)
4287 hresolve
->root
.u
.i
.link
);
4288 *sym_hash
= hresolve
;
4291 /* If the symbol has already been written out, skip it. */
4293 && h
->root
.type
!= bfd_link_hash_warning
4296 if ((type
& N_TYPE
) == N_INDR
4297 || type
== N_WARNING
)
4299 *symbol_map
= h
->indx
;
4303 /* See if we are stripping this symbol. */
4309 case strip_debugger
:
4310 if (is_stab (type
, name
))
4314 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
,
4315 false, false) == NULL
)
4329 /* Get the value of the symbol. */
4330 if (is_stab (type
, name
))
4335 symsec
= bfd_abs_section_ptr
;
4343 symsec
= obj_textsec (input_bfd
);
4347 symsec
= obj_datasec (input_bfd
);
4351 symsec
= obj_bsssec (input_bfd
);
4354 val
= GET_WORD (input_bfd
, sym
->e_value
);
4356 else if ((type
& N_TYPE
) == N_TEXT
4358 symsec
= obj_textsec (input_bfd
);
4359 else if ((type
& N_TYPE
) == N_DATA
4361 symsec
= obj_datasec (input_bfd
);
4362 else if ((type
& N_TYPE
) == N_BSS
4364 symsec
= obj_bsssec (input_bfd
);
4365 else if ((type
& N_TYPE
) == N_ABS
4367 symsec
= bfd_abs_section_ptr
;
4368 else if (((type
& N_TYPE
) == N_INDR
4369 && (hresolve
== NULL
4370 || (hresolve
->root
.type
!= bfd_link_hash_defined
4371 && hresolve
->root
.type
!= bfd_link_hash_defweak
4372 && hresolve
->root
.type
!= bfd_link_hash_common
)))
4373 || type
== N_WARNING
)
4375 /* Pass the next symbol through unchanged. The
4376 condition above for indirect symbols is so that if
4377 the indirect symbol was defined, we output it with
4378 the correct definition so the debugger will
4381 val
= GET_WORD (input_bfd
, sym
->e_value
);
4386 /* If we get here with an indirect symbol, it means that
4387 we are outputting it with a real definition. In such
4388 a case we do not want to output the next symbol,
4389 which is the target of the indirection. */
4390 if ((type
& N_TYPE
) == N_INDR
)
4395 /* We need to get the value from the hash table. We use
4396 hresolve so that if we have defined an indirect
4397 symbol we output the final definition. */
4400 switch (type
& N_TYPE
)
4403 symsec
= obj_textsec (input_bfd
);
4406 symsec
= obj_datasec (input_bfd
);
4409 symsec
= obj_bsssec (input_bfd
);
4412 symsec
= bfd_abs_section_ptr
;
4419 else if (hresolve
->root
.type
== bfd_link_hash_defined
4420 || hresolve
->root
.type
== bfd_link_hash_defweak
)
4422 asection
*input_section
;
4423 asection
*output_section
;
4425 /* This case usually means a common symbol which was
4426 turned into a defined symbol. */
4427 input_section
= hresolve
->root
.u
.def
.section
;
4428 output_section
= input_section
->output_section
;
4429 BFD_ASSERT (bfd_is_abs_section (output_section
)
4430 || output_section
->owner
== output_bfd
);
4431 val
= (hresolve
->root
.u
.def
.value
4432 + bfd_section_vma (output_section
)
4433 + input_section
->output_offset
);
4435 /* Get the correct type based on the section. If
4436 this is a constructed set, force it to be
4437 globally visible. */
4446 if (output_section
== obj_textsec (output_bfd
))
4447 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4450 else if (output_section
== obj_datasec (output_bfd
))
4451 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4454 else if (output_section
== obj_bsssec (output_bfd
))
4455 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4459 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4463 else if (hresolve
->root
.type
== bfd_link_hash_common
)
4464 val
= hresolve
->root
.u
.c
.size
;
4465 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
4474 val
= (symsec
->output_section
->vma
4475 + symsec
->output_offset
4476 + (GET_WORD (input_bfd
, sym
->e_value
)
4479 /* If this is a global symbol set the written flag, and if
4480 it is a local symbol see if we should discard it. */
4484 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4486 else if ((type
& N_TYPE
) != N_SETT
4487 && (type
& N_TYPE
) != N_SETD
4488 && (type
& N_TYPE
) != N_SETB
4489 && (type
& N_TYPE
) != N_SETA
)
4494 case discard_sec_merge
:
4497 if (!is_stab (type
, name
)
4498 && bfd_is_local_label_name (input_bfd
, name
))
4512 /* An N_BINCL symbol indicates the start of the stabs
4513 entries for a header file. We need to scan ahead to the
4514 next N_EINCL symbol, ignoring nesting, adding up all the
4515 characters in the symbol names, not including the file
4516 numbers in types (the first number after an open
4518 if (type
== N_BINCL
)
4520 struct external_nlist
*incl_sym
;
4522 struct aout_link_includes_entry
*incl_entry
;
4523 struct aout_link_includes_totals
*t
;
4527 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
4531 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
4532 if (incl_type
== N_EINCL
)
4538 else if (incl_type
== N_BINCL
)
4544 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
4545 for (; *s
!= '\0'; s
++)
4550 /* Skip the file number. */
4552 while (ISDIGIT (*s
))
4560 /* If we have already included a header file with the
4561 same value, then replace this one with an N_EXCL
4563 copy
= ! flaginfo
->info
->keep_memory
;
4564 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
4566 if (incl_entry
== NULL
)
4568 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
4569 if (t
->total
== val
)
4573 /* This is the first time we have seen this header
4574 file with this set of stabs strings. */
4575 t
= bfd_hash_allocate (&flaginfo
->includes
.root
,
4580 t
->next
= incl_entry
->totals
;
4581 incl_entry
->totals
= t
;
4587 /* This is a duplicate header file. We must change
4588 it to be an N_EXCL entry, and mark all the
4589 included symbols to prevent outputting them. */
4593 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
4595 incl_sym
++, incl_map
++)
4599 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
4600 if (incl_type
== N_EINCL
)
4609 else if (incl_type
== N_BINCL
)
4618 /* Copy this symbol into the list of symbols we are going to
4620 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
4621 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_ovly
), outsym
->e_ovly
);
4622 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
4624 if (! flaginfo
->info
->keep_memory
)
4626 /* name points into a string table which we are going to
4627 free. If there is a hash table entry, use that string.
4628 Otherwise, copy name into memory. */
4630 name
= h
->root
.root
.string
;
4634 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4636 if (strtab_index
== (bfd_size_type
) -1)
4638 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4639 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
4640 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
4641 ++obj_aout_external_sym_count (output_bfd
);
4645 /* Write out the output symbols we have just constructed. */
4646 if (outsym
> flaginfo
->output_syms
)
4650 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
4652 size
= outsym
- flaginfo
->output_syms
;
4653 size
*= EXTERNAL_NLIST_SIZE
;
4654 if (bfd_write (flaginfo
->output_syms
, size
, output_bfd
) != size
)
4656 flaginfo
->symoff
+= size
;
4662 /* Write out a symbol that was not associated with an a.out input
4666 bfd_getp32 (const void *p
)
4668 const bfd_byte
*addr
= p
;
4671 v
= (unsigned long) addr
[1] << 24;
4672 v
|= (unsigned long) addr
[0] << 16;
4673 v
|= (unsigned long) addr
[3] << 8;
4674 v
|= (unsigned long) addr
[2];
4678 #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
4680 static bfd_signed_vma
4681 bfd_getp_signed_32 (const void *p
)
4683 const bfd_byte
*addr
= p
;
4686 v
= (unsigned long) addr
[1] << 24;
4687 v
|= (unsigned long) addr
[0] << 16;
4688 v
|= (unsigned long) addr
[3] << 8;
4689 v
|= (unsigned long) addr
[2];
4690 return COERCE32 (v
);
4694 bfd_putp32 (bfd_vma data
, void *p
)
4698 addr
[0] = (data
>> 16) & 0xff;
4699 addr
[1] = (data
>> 24) & 0xff;
4700 addr
[2] = (data
>> 0) & 0xff;
4701 addr
[3] = (data
>> 8) & 0xff;
4704 const bfd_target
MY (vec
) =
4706 TARGETNAME
, /* Name. */
4707 bfd_target_aout_flavour
,
4708 BFD_ENDIAN_LITTLE
, /* Target byte order (little). */
4709 BFD_ENDIAN_LITTLE
, /* Target headers byte order (little). */
4710 (HAS_RELOC
| EXEC_P
| /* Object flags. */
4711 HAS_LINENO
| HAS_DEBUG
|
4712 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
),
4713 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
4714 MY_symbol_leading_char
,
4715 AR_PAD_CHAR
, /* AR_pad_char. */
4716 15, /* AR_max_namelen. */
4717 0, /* match priority. */
4718 TARGET_KEEP_UNUSED_SECTION_SYMBOLS
, /* keep unused section symbols. */
4719 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
4720 bfd_getp32
, bfd_getp_signed_32
, bfd_putp32
,
4721 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* Data. */
4722 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
4723 bfd_getp32
, bfd_getp_signed_32
, bfd_putp32
,
4724 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* Headers. */
4725 { /* bfd_check_format. */
4728 bfd_generic_archive_p
,
4731 { /* bfd_set_format. */
4732 _bfd_bool_bfd_false_error
,
4734 _bfd_generic_mkarchive
,
4735 _bfd_bool_bfd_false_error
4737 { /* bfd_write_contents. */
4738 _bfd_bool_bfd_false_error
,
4739 MY_write_object_contents
,
4740 _bfd_write_archive_contents
,
4741 _bfd_bool_bfd_false_error
4744 BFD_JUMP_TABLE_GENERIC (MY
),
4745 BFD_JUMP_TABLE_COPY (MY
),
4746 BFD_JUMP_TABLE_CORE (MY
),
4747 BFD_JUMP_TABLE_ARCHIVE (MY
),
4748 BFD_JUMP_TABLE_SYMBOLS (MY
),
4749 BFD_JUMP_TABLE_RELOCS (MY
),
4750 BFD_JUMP_TABLE_WRITE (MY
),
4751 BFD_JUMP_TABLE_LINK (MY
),
4752 BFD_JUMP_TABLE_DYNAMIC (MY
),
4754 /* Alternative_target. */
4757 (void *) MY_backend_data